diff mbox series

[03/14] scsi: fnic: Add support for fabric based solicited requests and responses

Message ID 20240610215100.673158-4-kartilak@cisco.com
State New
Headers show
Series Introduce support for feature Fabric Discovery and | expand

Commit Message

Karan Tilak Kumar June 10, 2024, 9:50 p.m. UTC 
Add fdls_disc.c to support fabric based solicited requests
and responses.
Clean up obsolete code but keep the function template so
as to not break compilation.
Remove duplicate definitions from header files.
Modify definitions of data members.

Reviewed-by: Sesidhar Baddela <sebaddel@cisco.com>
Reviewed-by: Arulprabhu Ponnusamy <arulponn@cisco.com>
Reviewed-by: Gian Carlo Boffa <gcboffa@cisco.com>
Signed-off-by: Karan Tilak Kumar <kartilak@cisco.com>
---
 drivers/scsi/fnic/Makefile    |    1 +
 drivers/scsi/fnic/fdls_disc.c | 1576 +++++++++++++++++++++++++++++++++
 drivers/scsi/fnic/fnic.h      |   26 +-
 drivers/scsi/fnic/fnic_fcs.c  |  404 +++++----
 drivers/scsi/fnic/fnic_fdls.h |    7 +-
 drivers/scsi/fnic/fnic_io.h   |   11 -
 drivers/scsi/fnic/fnic_main.c |   10 +-
 drivers/scsi/fnic/fnic_scsi.c |    6 +-
 8 files changed, 1849 insertions(+), 192 deletions(-)
 create mode 100644 drivers/scsi/fnic/fdls_disc.c

Comments

Hannes Reinecke June 11, 2024, 7:09 a.m. UTC | #1 
On 6/10/24 23:50, Karan Tilak Kumar wrote:
> Add fdls_disc.c to support fabric based solicited requests
> and responses.
> Clean up obsolete code but keep the function template so
> as to not break compilation.
> Remove duplicate definitions from header files.
> Modify definitions of data members.
> 
> Reviewed-by: Sesidhar Baddela <sebaddel@cisco.com>
> Reviewed-by: Arulprabhu Ponnusamy <arulponn@cisco.com>
> Reviewed-by: Gian Carlo Boffa <gcboffa@cisco.com>
> Signed-off-by: Karan Tilak Kumar <kartilak@cisco.com>
> ---
>   drivers/scsi/fnic/Makefile    |    1 +
>   drivers/scsi/fnic/fdls_disc.c | 1576 +++++++++++++++++++++++++++++++++
>   drivers/scsi/fnic/fnic.h      |   26 +-
>   drivers/scsi/fnic/fnic_fcs.c  |  404 +++++----
>   drivers/scsi/fnic/fnic_fdls.h |    7 +-
>   drivers/scsi/fnic/fnic_io.h   |   11 -
>   drivers/scsi/fnic/fnic_main.c |   10 +-
>   drivers/scsi/fnic/fnic_scsi.c |    6 +-
>   8 files changed, 1849 insertions(+), 192 deletions(-)
>   create mode 100644 drivers/scsi/fnic/fdls_disc.c
> 
> diff --git a/drivers/scsi/fnic/Makefile b/drivers/scsi/fnic/Makefile
> index 6214a6b2e96d..3bd6b1c8b643 100644
> --- a/drivers/scsi/fnic/Makefile
> +++ b/drivers/scsi/fnic/Makefile
> @@ -7,6 +7,7 @@ fnic-y	:= \
>   	fnic_main.o \
>   	fnic_res.o \
>   	fnic_fcs.o \
> +	fdls_disc.o \
>   	fnic_scsi.o \
>   	fnic_trace.o \
>   	fnic_debugfs.o \
> diff --git a/drivers/scsi/fnic/fdls_disc.c b/drivers/scsi/fnic/fdls_disc.c
> new file mode 100644
> index 000000000000..22a2d0c1c78f
> --- /dev/null
> +++ b/drivers/scsi/fnic/fdls_disc.c
> @@ -0,0 +1,1576 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
> + * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
> + */
> +
> +#include <linux/workqueue.h>
> +#include "fnic.h"
> +#include "fdls_fc.h"
> +#include "fnic_fdls.h"
> +#include <scsi/fc/fc_fcp.h>
> +#include <linux/utsname.h>
> +
> +static void fdls_send_rpn_id(struct fnic_iport_s *iport);
> +
> +/* Frame initialization */
> +/*
> + * Variables:
> + * sid
> + */
> +struct fc_els_s fnic_flogi_req = {
> +	.fchdr = {.r_ctl = 0x22, .did = {0xFF,  0xFF,  0xFE},
> +			  .type = 0x01, .f_ctl = FNIC_ELS_REQ_FCTL,
> +			  .ox_id = FNIC_FLOGI_OXID, .rx_id = 0xFFFF},
> +	.command = FC_ELS_FLOGI_REQ,
> +	.u.csp_flogi = {.fc_ph_ver = FNIC_FC_PH_VER,
> +					.b2b_credits = FNIC_FC_B2B_CREDIT,
> +					.b2b_rdf_size = FNIC_FC_B2B_RDF_SZ},
> +	.spc3 = {0x88, 0x00}
> +};
> +
> +/*
> + * Variables:
> + * sid, did(nport logins), ox_id(nport logins), nport_name, node_name
> + */
> +struct fc_els_s fnic_plogi_req = {
> +	.fchdr = {.r_ctl = 0x22, .did = {0xFF, 0xFF, 0xFC}, .type = 0x01,
> +			  .f_ctl = FNIC_ELS_REQ_FCTL, .ox_id = FNIC_PLOGI_FABRIC_OXID,
> +			  .rx_id = 0xFFFF},
> +	.command = FC_ELS_PLOGI_REQ,
> +	.u.csp_plogi = {.fc_ph_ver = FNIC_FC_PH_VER,
> +					.b2b_credits = FNIC_FC_B2B_CREDIT, .features = 0x0080,
> +					.b2b_rdf_size = FNIC_FC_B2B_RDF_SZ,
> +					.total_concur_seqs = FNIC_FC_CONCUR_SEQS,
> +					.ro_info = FNIC_FC_RO_INFO, .e_d_tov = FNIC_E_D_TOV},
> +	.spc3 = {0x88, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0xFF,
> +			 0x00, 0x00, 0x00, 0x01, 0x00, 0x00}
> +};
> +
> +/*
> + * Variables:
> + * sid, port_id, port_name
> + */
> +struct fc_rpn_id_s fnic_rpn_id_req = {
> +	.fchdr = {.r_ctl = 0x02, .did = {0xFF, 0xFF, 0xFC}, .type = 0x20,
> +			  .f_ctl = FNIC_ELS_REQ_FCTL, .ox_id = FNIC_RPN_REQ_OXID,
> +			  .rx_id = 0xFFFF},
> +	.fc_ct_hdr = {.rev = 0x01, .fs_type = 0xFC, .fs_subtype = 0x02,
> +				  .command = FC_CT_RPN_CMD}
> +};
> +
> +/*
> + * Variables:
> + * fh_s_id, port_id, port_name
> + */
> +struct fc_rft_id fnic_rft_id_req = {
> +	.fchdr = {.r_ctl = 0x02, .did = {0xFF, 0xFF, 0xFC}, .type = 0x20,
> +			  .f_ctl = FNIC_ELS_REQ_FCTL, .ox_id = FNIC_RFT_REQ_OXID,
> +			  .rx_id = 0xFFFF},
> +	.fc_ct_hdr = {.rev = 0x01, .fs_type = 0xFC, .fs_subtype = 0x02,
> +				  .command = FC_CT_RFT_CMD}
> +};
> +
> +/*
> + * Variables:
> + * fh_s_id, port_id, port_name
> + */
> +struct fc_rff_id fnic_rff_id_req = {
> +	.fchdr = {.r_ctl = 0x02, .did = {0xFF, 0xFF, 0xFC}, .type = 0x20,
> +			  .f_ctl = FNIC_ELS_REQ_FCTL, .ox_id = FNIC_RFF_REQ_OXID,
> +			  .rx_id = 0xFFFF},
> +	.fc_ct_hdr = {.rev = 0x01, .fs_type = 0xFC, .fs_subtype = 0x02,
> +				  .command = FC_CT_RFF_CMD},
> +	.tgt = 0x2,
> +	.fc4_type = 0x28
> +};
> +
> +/*
> + * Variables:
> + * sid
> + */
> +struct fc_gpn_ft_s fnic_gpn_ft_req = {
> +	.fchdr = {.r_ctl = 0x02, .did = {0xFF, 0xFF, 0xFC}, .type = 0x20,
> +			  .f_ctl = FNIC_ELS_REQ_FCTL, .ox_id = FNIC_GPN_FT_OXID,
> +			  .rx_id = 0xFFFF},
> +	.fc_ct_hdr = {.rev = 0x01, .fs_type = 0xFC, .fs_subtype = 0x02,
> +				  .command = FC_CT_GPN_FT_CMD},
> +	.fc4_type = 0x08
> +};
> +
> +/*
> + * Variables:
> + * sid
> + */
> +struct fc_scr_s fnic_scr_req = {
> +	.fchdr = {.r_ctl = 0x22, .did = {0xFF, 0xFF, 0xFD}, .type = 0x01,
> +			  .f_ctl = FNIC_ELS_REQ_FCTL, .ox_id = FNIC_SCR_REQ_OXID,
> +			  .rx_id = 0xFFFF},
> +	.command = FC_ELS_SCR,
> +	.reg_func = 0x03
> +};
> +
> +/*
> + * Variables:
> + * did, ox_id, rx_id, fcid, wwpn
> + */
> +struct fc_logo_req_s fnic_logo_req = {
> +	.fchdr = {.r_ctl = 0x22, .type = 0x01,
> +			  .f_ctl = FNIC_ELS_REQ_FCTL},
> +	.command = FC_ELS_LOGO,
> +};
> +
> +#define RETRIES_EXHAUSTED(iport)      \
> +	(iport->fabric.retry_counter == FABRIC_LOGO_MAX_RETRY)
> +
> +static void fdls_process_flogi_rsp(struct fnic_iport_s *iport,
> +		   struct fc_hdr_s *fchdr, void *rx_frame);
> +static void fnic_fdls_start_plogi(struct fnic_iport_s *iport);
> +static void fdls_start_fabric_timer(struct fnic_iport_s *iport,
> +			int timeout);
> +
> +static void
> +fdls_start_fabric_timer(struct fnic_iport_s *iport, int timeout)
> +{
> +	u64 fabric_tov;
> +	struct fnic *fnic = iport->fnic;
> +
> +	if (iport->fabric.timer_pending) {
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "iport fcid: 0x%x: Canceling fabric disc timer\n",
> +					 iport->fcid);
> +		fnic_del_fabric_timer_sync();
> +		iport->fabric.timer_pending = 0;
> +	}
> +
> +	if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED))
> +		iport->fabric.retry_counter++;
> +
> +	fabric_tov = jiffies + msecs_to_jiffies(timeout);
> +	mod_timer(&iport->fabric.retry_timer, round_jiffies(fabric_tov));
> +	iport->fabric.timer_pending = 1;
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "fabric timer is %d ", timeout);
> +}
> +
> +static void fdls_send_fabric_abts(struct fnic_iport_s *iport)
> +{
> +	uint8_t fcid[3];
> +	struct fnic *fnic = iport->fnic;
> +	struct fc_hdr_s fc_abts_s = {
> +		.r_ctl = 0x81,			/* ABTS */
> +		.did = {0xFF, 0xFF, 0xFF}, .sid = {0x00, 0x00, 0x00}, .cs_ctl =
> +			0x00, .type = 0x00, .f_ctl = FNIC_REQ_ABTS_FCTL, .seq_id =
> +			0x00, .df_ctl = 0x00, .seq_cnt = 0x0000, .rx_id = 0xFFFF,
> +		.param = 0x00000000,	/* bit:0 = 0 Abort a exchange */
> +	};
> +
You have a list of global static frame definitions above, and yet you 
define another static frame here within the function.
Please be consistent, and either make this a global definition, too, or 
move the global definitions into the caller.

> +	struct fc_hdr_s *pfc_abts = &fc_abts_s;
> +
> +	switch (iport->fabric.state) {
> +	case FDLS_STATE_FABRIC_LOGO:
> +		fc_abts_s.ox_id = FNIC_FLOGO_REQ_OXID;
> +		fc_abts_s.did[2] = 0xFE;
> +		break;
> +	case FDLS_STATE_FABRIC_FLOGI:
> +		fc_abts_s.ox_id = FNIC_FLOGI_OXID;
> +		fc_abts_s.did[2] = 0xFE;
> +		break;
> +
OMG. I was right. Static oxids.

Not that I am in any position to judge, but having static
OXIDs for command types feels decidedly ... odd.
I do see the motivation behind it (these OXIDs can't be used
for anything else), yet it also means that you can have only _one_
of these commands running at any given time.
And the biggest problem here is that you _cannot_ resend the
command if you run into a timeout; you have to wait for RA_TOV
(or worse) to trigger, and essentially have to tear down the
entire link just to ensure you can re-used the OXID.

In general I would _strongly_ discourage using static OXIDs.
Please use a pool of OXIDs, and allocate one from there.

> +	case FDLS_STATE_FABRIC_PLOGI:
> +		hton24(fcid, iport->fcid);
> +		FNIC_SET_S_ID(pfc_abts, fcid);
> +		fc_abts_s.ox_id = FNIC_PLOGI_FABRIC_OXID;
> +		fc_abts_s.did[2] = 0xFC;
> +		break;
> +
> +	case FDLS_STATE_RPN_ID:
> +		hton24(fcid, iport->fcid);
> +		FNIC_SET_S_ID(pfc_abts, fcid);
> +		fc_abts_s.ox_id = FNIC_RPN_REQ_OXID;
> +		fc_abts_s.did[2] = 0xFC;
> +		break;
> +
> +	case FDLS_STATE_SCR:
> +		hton24(fcid, iport->fcid);
> +		FNIC_SET_S_ID(pfc_abts, fcid);
> +		fc_abts_s.ox_id = FNIC_SCR_REQ_OXID;
> +		fc_abts_s.did[2] = 0xFD;
> +		break;
> +
> +	case FDLS_STATE_REGISTER_FC4_TYPES:
> +		hton24(fcid, iport->fcid);
> +		FNIC_SET_S_ID(pfc_abts, fcid);
> +		fc_abts_s.ox_id = FNIC_RFT_REQ_OXID;
> +		fc_abts_s.did[2] = 0xFC;
> +		break;
> +
> +	case FDLS_STATE_REGISTER_FC4_FEATURES:
> +		hton24(fcid, iport->fcid);
> +		FNIC_SET_S_ID(pfc_abts, fcid);
> +		fc_abts_s.ox_id = FNIC_RFF_REQ_OXID;
> +		fc_abts_s.did[2] = 0xFC;
> +		break;
> +
> +	case FDLS_STATE_GPN_FT:
> +		hton24(fcid, iport->fcid);
> +		FNIC_SET_S_ID(pfc_abts, fcid);
> +		fc_abts_s.ox_id = FNIC_GPN_FT_OXID;
> +		fc_abts_s.did[2] = 0xFC;
> +		break;
> +	default:
> +		return;
> +	}
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "FDLS sending fabric abts. iport->fabric.state: %d",
> +				 iport->fabric.state);
> +
> +	iport->fabric.flags |= FNIC_FDLS_FABRIC_ABORT_ISSUED;
> +	fnic_send_fcoe_frame(iport, &fc_abts_s, sizeof(struct fc_hdr_s));
> +	/* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */
> +
> +	fdls_start_fabric_timer(iport, 2 * iport->r_a_tov);
> +	iport->fabric.timer_pending = 1;
> +}
> +
> +static void fdls_send_fabric_flogi(struct fnic_iport_s *iport)
> +{
> +	struct fc_els_s flogi;
> +	struct fnic *fnic = iport->fnic;
> +
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "0x%x: FDLS send fabric FLOGI", iport->fcid);
> +
> +	memcpy(&flogi, &fnic_flogi_req, sizeof(struct fc_els_s));
> +	FNIC_SET_NPORT_NAME(flogi, iport->wwpn);
> +	FNIC_SET_NODE_NAME(flogi, iport->wwnn);
> +	FNIC_SET_RDF_SIZE(flogi.u.csp_flogi, iport->max_payload_size);
> +	FNIC_SET_R_A_TOV(flogi.u.csp_flogi, iport->r_a_tov);
> +	FNIC_SET_E_D_TOV(flogi.u.csp_flogi, iport->e_d_tov);
> +
> +	fnic_send_fcoe_frame(iport, &flogi, sizeof(struct fc_els_s));
> +	/* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */
> +	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
> +}
> +
> +
Double newline.

> +static void fdls_send_fabric_plogi(struct fnic_iport_s *iport)
> +{
> +	struct fc_els_s plogi;
> +	struct fc_hdr_s *fchdr = &plogi.fchdr;
> +	uint8_t fcid[3];
> +	struct fnic *fnic = iport->fnic;
> +
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "0x%x: FDLS send fabric PLOGI", iport->fcid);
> +
> +	memcpy(&plogi, &fnic_plogi_req, sizeof(struct fc_els_s));
> +
> +	hton24(fcid, iport->fcid);
> +
> +	FNIC_SET_S_ID(fchdr, fcid);
> +	FNIC_SET_NPORT_NAME(plogi, iport->wwpn);
> +	FNIC_SET_NODE_NAME(plogi, iport->wwnn);
> +	FNIC_SET_RDF_SIZE(plogi.u.csp_plogi, iport->max_payload_size);
> +
> +	fnic_send_fcoe_frame(iport, &plogi, sizeof(struct fc_els_s));
> +	/* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */
> +	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
> +}
> +
> +static void fdls_send_rpn_id(struct fnic_iport_s *iport)
> +{
> +	struct fc_rpn_id_s rpn_id;
> +	uint8_t fcid[3];
> +	struct fnic *fnic = iport->fnic;
> +
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "0x%x: FDLS send RPN ID", iport->fcid);
> +
> +	memcpy(&rpn_id, &fnic_rpn_id_req, sizeof(struct fc_rpn_id_s));
> +
> +	hton24(fcid, iport->fcid);
> +
> +	FNIC_SET_S_ID((&rpn_id.fchdr), fcid);
> +	FNIC_SET_RPN_PORT_ID((&rpn_id), fcid);
> +	FNIC_SET_RPN_PORT_NAME((&rpn_id), iport->wwpn);
> +
> +	fnic_send_fcoe_frame(iport, &rpn_id, sizeof(struct fc_rpn_id_s));
> +	/* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */
> +	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
> +}
> +
> +static void fdls_send_scr(struct fnic_iport_s *iport)
> +{
> +	struct fc_scr_s scr_req;
> +	uint8_t fcid[3];
> +	struct fnic *fnic = iport->fnic;
> +
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "0x%x: FDLS send SCR", iport->fcid);
> +
> +	memcpy(&scr_req, &fnic_scr_req, sizeof(struct fc_scr_s));
> +
> +	hton24(fcid, iport->fcid);
> +	FNIC_SET_S_ID((&scr_req.fchdr), fcid);
> +
> +	fnic_send_fcoe_frame(iport, &scr_req, sizeof(struct fc_scr_s));
> +	/* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */
> +	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
> +}
> +
> +static void fdls_send_gpn_ft(struct fnic_iport_s *iport, int fdls_state)
> +{
> +	struct fc_gpn_ft_s gpn_ft;
> +	uint8_t fcid[3];
> +	struct fnic *fnic = iport->fnic;
> +
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "0x%x: FDLS send GPN FT", iport->fcid);
> +
> +	memcpy(&gpn_ft, &fnic_gpn_ft_req, sizeof(struct fc_gpn_ft_s));
> +
> +	hton24(fcid, iport->fcid);
> +	FNIC_SET_S_ID((&gpn_ft.fchdr), fcid);
> +	fnic_send_fcoe_frame(iport, &gpn_ft, sizeof(struct fc_gpn_ft_s));
> +	/* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */
> +	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
> +	fdls_set_state((&iport->fabric), fdls_state);
> +}
> +
> +static void fdls_send_register_fc4_types(struct fnic_iport_s *iport)
> +{
> +	struct fc_rft_id rft_id;
> +	uint8_t fcid[3];
> +	struct fnic *fnic = iport->fnic;
> +
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "0x%x: FDLS sending FC4 Types", iport->fcid);
> +
> +	memset(&rft_id, 0, sizeof(struct fc_rft_id));
> +	memcpy(&rft_id, &fnic_rft_id_req, sizeof(struct fc_rft_id));
> +	hton24(fcid, iport->fcid);
> +
> +	FNIC_SET_S_ID((&rft_id.fchdr), fcid);
> +	FNIC_SET_PORT_ID((&rft_id), fcid);
> +	if (IS_FNIC_FCP_INITIATOR(fnic))
> +		rft_id.fc4_types[2] = 1;
> +
> +	rft_id.fc4_types[7] = 1;
> +	fnic_send_fcoe_frame(iport, &rft_id, sizeof(struct fc_rft_id));
> +	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
> +}
> +
> +static void fdls_send_register_fc4_features(struct fnic_iport_s *iport)
> +{
> +	struct fc_rff_id rff_id;
> +	uint8_t fcid[3];
> +	struct fnic *fnic = iport->fnic;
> +
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "0x%x: FDLS sending FC4 features", iport->fcid);
> +	memcpy(&rff_id, &fnic_rff_id_req, sizeof(struct fc_rff_id));
> +
> +	hton24(fcid, iport->fcid);
> +
> +	FNIC_SET_S_ID((&rff_id.fchdr), fcid);
> +	FNIC_SET_PORT_ID((&rff_id), fcid);
> +
> +	if (IS_FNIC_FCP_INITIATOR(fnic)) {
> +		rff_id.fc4_type = 0x08;
> +	} else {
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "0x%x: Unknown type", iport->fcid);
> +	}
> +
> +	fnic_send_fcoe_frame(iport, &rff_id, sizeof(struct fc_rff_id));
> +	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
> +}
> +
> +/***********************************************************************
> + * fdls_send_fabric_logo
> + *
> + * \brief Send flogo to the fcf
> + *
> + * \param[in]  iport   Handle to fnic iport.
> + *
> + * \param[in]  start_timer  1 if we want to start a perodic timer else 0
> + *
> + * \retval void
> + *
> + * \locks Currently this assumes to be called with fnic lock held
> + *
> + * \note This function does not change or check the fabric state.
> + *       It the caller responsibility to set the appropriate iport fabric
> + *       state when this is called. Normall its FDLS_STATE_FABRIC_LOGO.
> + *       fdls_set_state((&iport->fabric), FDLS_STATE_FABRIC_LOGO)
> + * \note Locking can be changed and made bit granuler in future
> + *
> + ***********************************************************************/
Please use the correct kernel-doc format.

> +void fdls_send_fabric_logo(struct fnic_iport_s *iport)
> +{
> +	struct fc_logo_req_s logo;
> +	uint8_t s_id[3];
> +	uint8_t d_id[3] = { 0xFF, 0xFF, 0xFE };
> +	struct fnic *fnic = iport->fnic;
> +
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "Sending logo to fabric from iport->fcid: 0x%x",
> +				 iport->fcid);
> +	memcpy(&logo, &fnic_logo_req, sizeof(struct fc_logo_req_s));
> +
> +	hton24(s_id, iport->fcid);
> +
> +	FNIC_SET_S_ID((&logo.fchdr), s_id);
> +	FNIC_SET_D_ID((&logo.fchdr), d_id);
> +	FNIC_SET_OX_ID((&logo.fchdr), FNIC_FLOGO_REQ_OXID);
> +
> +	memcpy(&logo.fcid, s_id, 3);
> +	logo.wwpn = htonll(iport->wwpn);
> +
> +	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
> +
> +	iport->fabric.flags &= ~FNIC_FDLS_FABRIC_ABORT_ISSUED;
> +	fnic_send_fcoe_frame(iport, &logo, sizeof(struct fc_logo_req_s));
> +}
> +
> +void fdls_fabric_timer_callback(struct timer_list *t)
> +{
> +	struct fnic_fdls_fabric_s *fabric = from_timer(fabric, t, retry_timer);
> +	struct fnic_iport_s *iport =
> +		container_of(fabric, struct fnic_iport_s, fabric);
> +	struct fnic *fnic = iport->fnic;
> +	unsigned long flags;
> +
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +		 "tp: %d fab state: %d fab retry counter: %d max_flogi_retries: %d",
> +		 iport->fabric.timer_pending, iport->fabric.state,
> +		 iport->fabric.retry_counter, iport->max_flogi_retries);
> +
> +	spin_lock_irqsave(&fnic->fnic_lock, flags);
> +
> +	if (!iport->fabric.timer_pending) {
> +		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> +		return;
> +	}
> +
> +	if (iport->fabric.del_timer_inprogress) {
> +		iport->fabric.del_timer_inprogress = 0;
> +		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "fabric_del_timer inprogress(%d). Skip timer cb",
> +					 iport->fabric.del_timer_inprogress);
> +		return;
> +	}
> +
> +	iport->fabric.timer_pending = 0;
> +
> +	/* The fabric state indicates which frames have time out, and we retry */
> +	switch (iport->fabric.state) {
> +	case FDLS_STATE_FABRIC_FLOGI:
> +		/* Flogi received a LS_RJT with busy we retry from here */
> +		if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME)
> +			&& (iport->fabric.retry_counter < iport->max_flogi_retries)) {
> +			iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME;
> +			fdls_send_fabric_flogi(iport);
> +			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> +			return;
> +		}
> +		/* Flogi has time out 2*ed_tov send abts */
> +		if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) {
> +			fdls_send_fabric_abts(iport);
> +		} else {
> +			/* Flogi ABTS has timed out and we have waited
> +			 * (2 * ra_tov), we can retry safely with same
> +			 * exchange id
> +			 */
> +			if (iport->fabric.retry_counter < iport->max_flogi_retries) {
> +				iport->fabric.flags &= ~FNIC_FDLS_FABRIC_ABORT_ISSUED;
> +				fdls_send_fabric_flogi(iport);
> +			} else
> +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +							 "Exceeded max FLOGI retries");
> +		}
> +		break;
> +	case FDLS_STATE_FABRIC_PLOGI:
> +		/* Plogi received a LS_RJT with busy we retry from here */
> +		if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME)
> +			&& (iport->fabric.retry_counter < iport->max_plogi_retries)) {
> +			iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME;
> +			fdls_send_fabric_plogi(iport);
> +			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> +			return;
> +		}
> +		/* Plogi has timed out 2*ed_tov send abts */
> +		if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) {
> +			fdls_send_fabric_abts(iport);
> +		} else {
> +			/* plogi ABTS has timed out and we have waited
> +			 * (2 * ra_tov) can retry safely with same
> +			 * exchange id
> +			 */
> +			if (iport->fabric.retry_counter < iport->max_plogi_retries) {
> +				iport->fabric.flags &= ~FNIC_FDLS_FABRIC_ABORT_ISSUED;
> +				fdls_send_fabric_plogi(iport);
> +			} else
> +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +							 "Exceeded max PLOGI retries");
> +		}
> +		break;
> +	case FDLS_STATE_RPN_ID:
> +		/* Rpn_id received a LS_RJT with busy we retry from here */
> +		if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME)
> +			&& (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) {
> +			iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME;
> +			fdls_send_rpn_id(iport);
> +			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> +			return;
> +		}
> +		/* RPN have timed out send abts */
> +		if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED))
> +			fdls_send_fabric_abts(iport);
> +		else
> +			/* ABTS has timed out (2*ra_tov) */
> +			fnic_fdls_start_plogi(iport);	/* go back to fabric Plogi */
> +		break;
> +	case FDLS_STATE_SCR:
> +		/* scr received a LS_RJT with busy we retry from here */
> +		if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME)
> +			&& (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) {
> +			iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME;
> +			fdls_send_scr(iport);
> +			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> +			return;
> +		}
> +		/* scr have timed out send abts */
> +		if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED))
> +			fdls_send_fabric_abts(iport);
> +		else {
> +			/* ABTS has timed out (2*ra_tov), we give up */
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +						 "ABTS timed out. Starting PLOGI: %p", iport);
> +			fnic_fdls_start_plogi(iport);
> +		}
> +		break;
> +	case FDLS_STATE_REGISTER_FC4_TYPES:
> +		/* scr received a LS_RJT with busy we retry from here */
> +		if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME)
> +			&& (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) {
> +			iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME;
> +			fdls_send_register_fc4_types(iport);
> +			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> +			return;
> +		}
> +		/* RFT_ID timed out send abts */
> +		if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) {
> +			fdls_send_fabric_abts(iport);
> +		} else {
> +			/* ABTS has timed out (2*ra_tov), we give up */
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +						 "ABTS timed out. Starting PLOGI: %p", iport);
> +			fnic_fdls_start_plogi(iport);	/* go back to fabric Plogi */
> +		}
> +		break;
> +	case FDLS_STATE_REGISTER_FC4_FEATURES:
> +		/* scr received a LS_RJT with busy we retry from here */
> +		if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME)
> +			&& (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) {
> +			iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME;
> +			fdls_send_register_fc4_features(iport);
> +			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> +			return;
> +		}
> +		/* scr have timed out send abts */
> +		if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED))
> +			fdls_send_fabric_abts(iport);
> +		else {
> +			/* ABTS has timed out (2*ra_tov), we give up */
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +						 "ABTS timed out. Starting PLOGI %p", iport);
> +			fnic_fdls_start_plogi(iport);	/* go back to fabric Plogi */
> +		}
> +		break;
> +	case FDLS_STATE_RSCN_GPN_FT:
> +	case FDLS_STATE_SEND_GPNFT:
> +	case FDLS_STATE_GPN_FT:
> +		/* GPN_FT received a LS_RJT with busy we retry from here */
> +		if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME)
> +			&& (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) {
> +			iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME;
> +			fdls_send_gpn_ft(iport, iport->fabric.state);
> +			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> +			return;
> +		}
> +		/* gpn_gt have timed out send abts */
> +		if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) {
> +			fdls_send_fabric_abts(iport);
> +		} else {
> +			/*
> +			 * ABTS has timed out have waited (2*ra_tov) can
> +			 * retry safely with same exchange id
> +			 */
> +			if (iport->fabric.retry_counter < FDLS_RETRY_COUNT) {
> +				fdls_send_gpn_ft(iport, iport->fabric.state);
> +			} else {
> +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "ABTS timeout for fabric GPN_FT. Check name server: %p",
> +					 iport);
> +			}
> +		}
> +		break;
> +	default:
> +		break;
> +	}
> +	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> +}
> +
> +static void fnic_fdls_start_flogi(struct fnic_iport_s *iport)
> +{
> +	iport->fabric.retry_counter = 0;
> +	fdls_send_fabric_flogi(iport);
> +	fdls_set_state((&iport->fabric), FDLS_STATE_FABRIC_FLOGI);
> +	iport->fabric.flags = 0;
> +}
> +
> +static void fnic_fdls_start_plogi(struct fnic_iport_s *iport)
> +{
> +	iport->fabric.retry_counter = 0;
> +	fdls_send_fabric_plogi(iport);
> +	fdls_set_state((&iport->fabric), FDLS_STATE_FABRIC_PLOGI);
> +	iport->fabric.flags &= ~FNIC_FDLS_FABRIC_ABORT_ISSUED;
> +}
> +
> +static void
> +fdls_process_rff_id_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr)
> +{
> +	struct fnic *fnic = iport->fnic;
> +	struct fnic_fdls_fabric_s *fdls = &iport->fabric;
> +	struct fc_rff_id *rff_rsp = (struct fc_rff_id *) fchdr;
> +	uint16_t rsp;
> +	uint8_t reason_code;
> +
> +	if (fdls_get_state(fdls) != FDLS_STATE_REGISTER_FC4_FEATURES) {
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "RFF_ID resp recvd in state(%d). Dropping.",
> +					 fdls_get_state(fdls));
> +		return;
> +	}
> +
> +	rsp = FNIC_GET_FC_CT_CMD((&rff_rsp->fc_ct_hdr));
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "0x%x: FDLS process RFF ID response: 0x%04x", iport->fcid,
> +				 (uint32_t) rsp);
> +
> +	switch (rsp) {
> +	case FC_CT_ACC:
> +		if (iport->fabric.timer_pending) {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +						 "Canceling fabric disc timer %p\n", iport);
> +			fnic_del_fabric_timer_sync();
> +		}
> +		iport->fabric.timer_pending = 0;
> +		fdls->retry_counter = 0;
> +		fdls_set_state((&iport->fabric), FDLS_STATE_SCR);
> +		fdls_send_scr(iport);
> +		break;
> +	case FC_CT_REJ:
> +		reason_code = rff_rsp->fc_ct_hdr.reason_code;
> +		if (((reason_code == FC_CT_RJT_LOGICAL_BUSY)
> +			 || (reason_code == FC_CT_RJT_BUSY))
> +			&& (fdls->retry_counter < FDLS_RETRY_COUNT)) {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "RFF_ID ret FC_LS_REJ BUSY. Retry from timer routine %p",
> +					 iport);
> +
> +			/* Retry again from the timer routine */
> +			fdls->flags |= FNIC_FDLS_RETRY_FRAME;
> +		} else {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "RFF_ID returned FC_LS_REJ. Halting discovery %p", iport);
> +			if (iport->fabric.timer_pending) {
> +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +							 "Canceling fabric disc timer %p\n", iport);
> +				fnic_del_fabric_timer_sync();
> +			}
> +			fdls->timer_pending = 0;
> +			fdls->retry_counter = 0;
> +		}
> +		break;
> +	default:
> +		break;
> +	}
> +}
> +
> +static void
> +fdls_process_rft_id_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr)
> +{
> +	struct fnic_fdls_fabric_s *fdls = &iport->fabric;
> +	struct fc_rft_id *rft_rsp = (struct fc_rft_id *) fchdr;
> +	uint16_t rsp;
> +	uint8_t reason_code;
> +	struct fnic *fnic = iport->fnic;
> +
> +	if (fdls_get_state(fdls) != FDLS_STATE_REGISTER_FC4_TYPES) {
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "RFT_ID resp recvd in state(%d). Dropping.",
> +					 fdls_get_state(fdls));
> +		return;
> +	}
> +
> +	rsp = FNIC_GET_FC_CT_CMD((&rft_rsp->fc_ct_hdr));
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "0x%x: FDLS process RFT ID response: 0x%04x", iport->fcid,
> +				 (uint32_t) rsp);
> +
> +	switch (rsp) {
> +	case FC_CT_ACC:
> +		if (iport->fabric.timer_pending) {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +						 "Canceling fabric disc timer %p\n", iport);
> +			fnic_del_fabric_timer_sync();
> +		}
> +		iport->fabric.timer_pending = 0;
> +		fdls->retry_counter = 0;
> +		fdls_send_register_fc4_features(iport);
> +		fdls_set_state((&iport->fabric), FDLS_STATE_REGISTER_FC4_FEATURES);
> +		break;
> +	case FC_CT_REJ:
> +		reason_code = rft_rsp->fc_ct_hdr.reason_code;
> +		if (((reason_code == FC_CT_RJT_LOGICAL_BUSY)
> +			 || (reason_code == FC_CT_RJT_BUSY))
> +			&& (fdls->retry_counter < FDLS_RETRY_COUNT)) {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "0x%x: RFT_ID ret FC_LS_REJ BUSY. Retry from timer routine",
> +				 iport->fcid);
> +
> +			/* Retry again from the timer routine */
> +			fdls->flags |= FNIC_FDLS_RETRY_FRAME;
> +		} else {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "0x%x: RFT_ID REJ. Halting discovery reason %d expl %d",
> +				 iport->fcid, reason_code,
> +				 rft_rsp->fc_ct_hdr.reason_expl);
> +			if (iport->fabric.timer_pending) {
> +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +							 "Canceling fabric disc timer %p\n", iport);
> +				fnic_del_fabric_timer_sync();
> +			}
> +			fdls->timer_pending = 0;
> +			fdls->retry_counter = 0;
> +		}
> +		break;
> +	default:
> +		break;
> +	}
> +}
> +
> +static void
> +fdls_process_rpn_id_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr)
> +{
> +	struct fnic_fdls_fabric_s *fdls = &iport->fabric;
> +	struct fc_rpn_id_s *rpn_rsp = (struct fc_rpn_id_s *) fchdr;
> +	uint16_t rsp;
> +	uint8_t reason_code;
> +	struct fnic *fnic = iport->fnic;
> +
> +	if (fdls_get_state(fdls) != FDLS_STATE_RPN_ID) {
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "RPN_ID resp recvd in state(%d). Dropping.",
> +					 fdls_get_state(fdls));
> +		return;
> +	}
> +
> +	rsp = FNIC_GET_FC_CT_CMD((&rpn_rsp->fc_ct_hdr));
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "0x%x: FDLS process RPN ID response: 0x%04x", iport->fcid,
> +				 (uint32_t) rsp);
> +
> +	switch (rsp) {
> +	case FC_CT_ACC:
> +		if (iport->fabric.timer_pending) {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +						 "Canceling fabric disc timer %p\n", iport);
> +			fnic_del_fabric_timer_sync();
> +		}
> +		iport->fabric.timer_pending = 0;
> +		fdls->retry_counter = 0;
> +		fdls_send_register_fc4_types(iport);
> +		fdls_set_state((&iport->fabric), FDLS_STATE_REGISTER_FC4_TYPES);
> +		break;
> +	case FC_CT_REJ:
> +		reason_code = rpn_rsp->fc_ct_hdr.reason_code;
> +		if (((reason_code == FC_CT_RJT_LOGICAL_BUSY)
> +			 || (reason_code == FC_CT_RJT_BUSY))
> +			&& (fdls->retry_counter < FDLS_RETRY_COUNT)) {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "RPN_ID returned REJ BUSY. Retry from timer routine %p",
> +					 iport);
> +
> +			/* Retry again from the timer routine */
> +			fdls->flags |= FNIC_FDLS_RETRY_FRAME;
> +		} else {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +						 "RPN_ID FC_LS_REJ. Halting discovery %p", iport);
> +			if (iport->fabric.timer_pending) {
> +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +							 "Canceling fabric disc timer %p\n", iport);
> +				fnic_del_fabric_timer_sync();
> +			}
> +			fdls->timer_pending = 0;
> +			fdls->retry_counter = 0;
> +		}
> +		break;
> +	default:
> +		break;
> +	}
> +}
> +
> +static void
> +fdls_process_scr_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr)
> +{
> +	struct fnic_fdls_fabric_s *fdls = &iport->fabric;
> +	struct fc_scr_s *scr_rsp = (struct fc_scr_s *) fchdr;
> +	struct fc_els_reject_s *els_rjt = (struct fc_els_reject_s *) fchdr;
> +	struct fnic *fnic = iport->fnic;
> +
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "FDLS process SCR response: 0x%04x",
> +				 (uint32_t) scr_rsp->command);
> +
> +	if (fdls_get_state(fdls) != FDLS_STATE_SCR) {
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "SCR resp recvd in state(%d). Dropping.",
> +					 fdls_get_state(fdls));
> +		return;
> +	}
> +
> +	switch (scr_rsp->command) {
> +	case FC_LS_ACC:
> +		if (iport->fabric.timer_pending) {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +						 "Canceling fabric disc timer %p\n", iport);
> +			fnic_del_fabric_timer_sync();
> +		}
> +		iport->fabric.timer_pending = 0;
> +		iport->fabric.retry_counter = 0;
> +		fdls_send_gpn_ft(iport, FDLS_STATE_GPN_FT);
> +		break;
> +
> +	case FC_LS_REJ:
> +		if (((els_rjt->reason_code == FC_ELS_RJT_LOGICAL_BUSY)
> +			 || (els_rjt->reason_code == FC_ELS_RJT_BUSY))
> +			&& (fdls->retry_counter < FDLS_RETRY_COUNT)) {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +						 "SCR FC_LS_REJ BUSY. Retry from timer routine %p",
> +						 iport);
> +			/* Retry again from the timer routine */
> +			fdls->flags |= FNIC_FDLS_RETRY_FRAME;
> +		} else {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +						 "SCR returned FC_LS_REJ. Halting discovery %p",
> +						 iport);
> +			if (iport->fabric.timer_pending) {
> +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +							 "Canceling fabric disc timer %p\n", iport);
> +				fnic_del_fabric_timer_sync();
> +			}
> +			fdls->timer_pending = 0;
> +			fdls->retry_counter = 0;
> +		}
> +		break;
> +
> +	default:
> +		break;
> +	}
> +}
> +
> +static void
> +fdls_process_gpn_ft_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr,
> +						int len)
> +{
> +	struct fnic_fdls_fabric_s *fdls = &iport->fabric;
> +	struct fc_gpn_ft_s *gpn_ft_rsp = (struct fc_gpn_ft_s *) fchdr;
> +	uint16_t rsp;
> +	uint8_t reason_code;
> +	struct fnic *fnic = iport->fnic;
> +
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "FDLS process GPN_FT response: iport state: %d len: %d",
> +				 iport->state, len);
> +
> +	/*
> +	 * GPNFT response :-
> +	 *  FDLS_STATE_GPN_FT      : GPNFT send after SCR state
> +	 *  during fabric discovery(FNIC_IPORT_STATE_FABRIC_DISC)
> +	 *  FDLS_STATE_RSCN_GPN_FT : GPNFT send in response to RSCN
> +	 *  FDLS_STATE_SEND_GPNFT  : GPNFT send after deleting a Target,
> +	 *  e.g. after receiving Target LOGO
> +	 *  FDLS_STATE_TGT_DISCOVERY :Target discovery is currently in progress
> +	 *  from previous GPNFT response,a new GPNFT response has come.
> +	 */
> +	if (!(((iport->state == FNIC_IPORT_STATE_FABRIC_DISC)
> +		   && (fdls_get_state(fdls) == FDLS_STATE_GPN_FT))
> +		  || ((iport->state == FNIC_IPORT_STATE_READY)
> +			  && ((fdls_get_state(fdls) == FDLS_STATE_RSCN_GPN_FT)
> +				  || (fdls_get_state(fdls) == FDLS_STATE_SEND_GPNFT)
> +				  || (fdls_get_state(fdls) == FDLS_STATE_TGT_DISCOVERY))))) {
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +			 "GPNFT resp recvd in fab state(%d) iport_state(%d). Dropping.",
> +			 fdls_get_state(fdls), iport->state);
> +		return;
> +	}
> +
> +	iport->state = FNIC_IPORT_STATE_READY;
> +	rsp = FNIC_GET_FC_CT_CMD((&gpn_ft_rsp->fc_ct_hdr));
> +
> +	switch (rsp) {
> +
> +	case FC_CT_ACC:
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "0x%x: GPNFT_RSP accept", iport->fcid);
> +		break;
> +
> +	case FC_CT_REJ:
> +		reason_code = gpn_ft_rsp->fc_ct_hdr.reason_code;
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "0x%x: GPNFT_RSP Reject", iport->fcid);
> +		break;
> +
> +	default:
> +		break;
> +	}
> +}
> +
> +/***********************************************************************
> + * fdls_process_fabric_logo_rsp
> + *
> + * \brief Handles a flogo response from the fcf
> + *
> + * \param[in]  iport   Handle to fnic iport.
> + *
> + * \param[in]  fchdr   Incoming frame
> + *
> + * \retval void
> + *
> + *
> + ***********************************************************************/
Again, please use correct kernel-doc format.

> +static void
> +fdls_process_fabric_logo_rsp(struct fnic_iport_s *iport,
> +							 struct fc_hdr_s *fchdr)
> +{
> +	struct fc_els_s *flogo_rsp = (struct fc_els_s *) fchdr;
> +	struct fnic *fnic = iport->fnic;
> +
> +	switch (flogo_rsp->command) {
> +	case FC_LS_ACC:
> +		if (iport->fabric.state != FDLS_STATE_FABRIC_LOGO) {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "Flogo response. Fabric not in LOGO state. Dropping! %p",
> +				 iport);
> +			return;
> +		}
> +
> +		iport->fabric.state = FDLS_STATE_FLOGO_DONE;
> +		iport->state = FNIC_IPORT_STATE_LINK_WAIT;
> +
> +		if (iport->fabric.timer_pending) {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +						 "lport 0x%p Canceling fabric disc timer\n",
> +						 iport);
> +			fnic_del_fabric_timer_sync();
> +		}
> +		iport->fabric.timer_pending = 0;
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "Flogo response from Fabric for did: 0x%x",
> +					 ntoh24(fchdr->did));
> +		return;
> +
> +	case FC_LS_REJ:
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +			 "Flogo response from Fabric for did: 0x%x returned FC_LS_REJ",
> +			 ntoh24(fchdr->did));
> +		return;
> +
> +	default:
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "FLOGO response not accepted or rejected: 0x%x",
> +					 flogo_rsp->command);
> +	}
> +}
> +
> +static void
> +fdls_process_flogi_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr,
> +					   void *rx_frame)
> +{
> +	struct fnic_fdls_fabric_s *fabric = &iport->fabric;
> +	struct fc_els_s *flogi_rsp = (struct fc_els_s *) fchdr;
> +	uint8_t *fcid;
> +	int rdf_size;
> +	struct fc_els_reject_s *els_rjt;
> +	uint8_t fcmac[6] = { 0x0E, 0XFC, 0x00, 0x00, 0x00, 0x00 };
> +	struct fnic *fnic = iport->fnic;
> +
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "0x%x: FDLS processing FLOGI response", iport->fcid);
> +
> +	if (fdls_get_state(fabric) != FDLS_STATE_FABRIC_FLOGI) {
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "FLOGI response received in state (%d). Dropping frame",
> +					 fdls_get_state(fabric));
> +		return;
> +	}
> +
> +	switch (flogi_rsp->command) {
> +	case FC_LS_ACC:
> +		if (iport->fabric.timer_pending) {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +						 "iport fcid: 0x%x Canceling fabric disc timer\n",
> +						 iport->fcid);
> +			fnic_del_fabric_timer_sync();
> +		}
> +
> +		iport->fabric.timer_pending = 0;
> +		iport->fabric.retry_counter = 0;
> +		fcid = FNIC_GET_D_ID(fchdr);
> +		iport->fcid = ntoh24(fcid);
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "0x%x: FLOGI response accepted", iport->fcid);
> +
> +		/* Learn the Service Params */
> +		rdf_size = ntohs(flogi_rsp->u.csp_flogi.b2b_rdf_size);
> +		if ((rdf_size >= FNIC_MIN_DATA_FIELD_SIZE)
> +			&& (rdf_size < FNIC_FC_MAX_PAYLOAD_LEN))
> +			iport->max_payload_size = MIN(rdf_size,
> +								  iport->max_payload_size);
> +
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "max_payload_size from fabric: %d set: %d", rdf_size,
> +					 iport->max_payload_size);
> +
> +		iport->r_a_tov = ntohl(flogi_rsp->u.csp_flogi.r_a_tov);
> +		iport->e_d_tov = ntohl(flogi_rsp->u.csp_flogi.e_d_tov);
> +
> +		if (flogi_rsp->u.csp_flogi.features & FNIC_FC_EDTOV_NSEC)
> +			iport->e_d_tov = iport->e_d_tov / FNIC_NSEC_TO_MSEC;
> +
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "From fabric: R_A_TOV: %d E_D_TOV: %d",
> +					 iport->r_a_tov, iport->e_d_tov);
> +
> +		if (IS_FNIC_FCP_INITIATOR(fnic)) {
> +			fc_host_fabric_name(iport->fnic->lport->host) =
> +				get_unaligned_be64(&flogi_rsp->node_name);
> +			fc_host_port_id(iport->fnic->lport->host) = iport->fcid;
> +		}
> +
> +		fnic_fdls_learn_fcoe_macs(iport, rx_frame, fcid);
> +
> +		memcpy(&fcmac[3], fcid, 3);
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +			 "Adding vNIC device MAC addr: %02x:%02x:%02x:%02x:%02x:%02x",
> +			 fcmac[0], fcmac[1], fcmac[2], fcmac[3], fcmac[4],
> +			 fcmac[5]);
> +		vnic_dev_add_addr(iport->fnic->vdev, fcmac);
> +
> +		if (fdls_get_state(fabric) == FDLS_STATE_FABRIC_FLOGI) {
> +			fnic_fdls_start_plogi(iport);
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +						 "FLOGI response received. Starting PLOGI");
> +		} else {
> +			/* From FDLS_STATE_FABRIC_FLOGI state fabric can only go to
> +			 * FDLS_STATE_LINKDOWN
> +			 * state, hence we don't have to worry about undoing:
> +			 * the fnic_fdls_register_portid and vnic_dev_add_addr
> +			 */
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "FLOGI response received in state (%d). Dropping frame",
> +				 fdls_get_state(fabric));
> +		}
> +		break;
> +
> +	case FC_LS_REJ:
> +		els_rjt = (struct fc_els_reject_s *) fchdr;
> +		if (fabric->retry_counter < iport->max_flogi_retries) {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "FLOGI returned FC_LS_REJ BUSY. Retry from timer routine %p",
> +				 iport);
> +
> +			/* Retry Flogi again from the timer routine. */
> +			fabric->flags |= FNIC_FDLS_RETRY_FRAME;
> +
> +		} else {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "FLOGI returned FC_LS_REJ. Halting discovery %p", iport);
> +			if (iport->fabric.timer_pending) {
> +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +							 "iport 0x%p Canceling fabric disc timer\n",
> +							 iport);
> +				fnic_del_fabric_timer_sync();
> +			}
> +			fabric->timer_pending = 0;
> +			fabric->retry_counter = 0;
> +		}
> +		break;
> +
> +	default:
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "FLOGI response not accepted: 0x%x",
> +					 flogi_rsp->command);
> +		break;
> +	}
> +}
> +
> +static void
> +fdls_process_fabric_plogi_rsp(struct fnic_iport_s *iport,
> +							  struct fc_hdr_s *fchdr)
> +{
> +	struct fc_els_s *plogi_rsp = (struct fc_els_s *) fchdr;
> +	struct fc_els_reject_s *els_rjt = (struct fc_els_reject_s *) fchdr;
> +	struct fnic *fnic = iport->fnic;
> +
> +	if (fdls_get_state((&iport->fabric)) != FDLS_STATE_FABRIC_PLOGI) {
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +			 "Fabric PLOGI response received in state (%d). Dropping frame",
> +			 fdls_get_state(&iport->fabric));
> +		return;
> +	}
> +
> +	switch (plogi_rsp->command) {
> +	case FC_LS_ACC:
> +		if (iport->fabric.timer_pending) {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "iport fcid: 0x%x fabric PLOGI response: Accepted\n",
> +				 iport->fcid);
> +			fnic_del_fabric_timer_sync();
> +		}
> +		iport->fabric.timer_pending = 0;
> +		iport->fabric.retry_counter = 0;
> +		fdls_set_state(&iport->fabric, FDLS_STATE_RPN_ID);
> +		fdls_send_rpn_id(iport);
> +		break;
> +	case FC_LS_REJ:
> +		if (((els_rjt->reason_code == FC_ELS_RJT_LOGICAL_BUSY)
> +			 || (els_rjt->reason_code == FC_ELS_RJT_BUSY))
> +			&& (iport->fabric.retry_counter < iport->max_plogi_retries)) {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "0x%x: Fabric PLOGI FC_LS_REJ BUSY. Retry from timer routine",
> +				 iport->fcid);
> +		} else {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "0x%x: Fabric PLOGI FC_LS_REJ. Halting discovery",
> +				 iport->fcid);
> +			if (iport->fabric.timer_pending) {
> +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +							 "iport fcid: 0x%x Canceling fabric disc timer\n",
> +							 iport->fcid);
> +				fnic_del_fabric_timer_sync();
> +			}
> +			iport->fabric.timer_pending = 0;
> +			iport->fabric.retry_counter = 0;
> +			return;
> +		}
> +		break;
> +	default:
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "PLOGI response not accepted: 0x%x",
> +					 plogi_rsp->command);
> +		break;
> +	}
> +}
> +
> +static void
> +fdls_process_fabric_abts_rsp(struct fnic_iport_s *iport,
> +							 struct fc_hdr_s *fchdr)
> +{
> +	uint32_t s_id;
> +	struct fc_abts_ba_acc_s *ba_acc = (struct fc_abts_ba_acc_s *) fchdr;
> +	struct fc_abts_ba_rjt_s *ba_rjt;
> +	uint32_t fabric_state = iport->fabric.state;
> +	struct fnic *fnic = iport->fnic;
> +
> +	s_id = ntoh24(fchdr->sid);
> +	ba_rjt = (struct fc_abts_ba_rjt_s *) fchdr;
> +
> +	if (!((s_id == FC_DIR_SERVER) || (s_id == FC_DOMAIN_CONTR)
> +		  || (s_id == FC_FABRIC_CONTROLLER))) {
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +			 "Received abts rsp with invalid SID: 0x%x. Dropping frame",
> +			 s_id);
> +		return;
> +	}
> +
> +	if (iport->fabric.timer_pending) {
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "Canceling fabric disc timer %p\n", iport);
> +		fnic_del_fabric_timer_sync();
> +	}
> +	iport->fabric.timer_pending = 0;
> +	iport->fabric.flags &= ~FNIC_FDLS_FABRIC_ABORT_ISSUED;
> +
> +	if (fchdr->r_ctl == FNIC_BA_ACC_RCTL) {
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +			 "Received abts rsp BA_ACC for fabric_state: %d OX_ID: 0x%x",
> +			 fabric_state, ba_acc->ox_id);
> +	} else if (fchdr->r_ctl == FNIC_BA_RJT_RCTL) {
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +			 "BA_RJT fs: %d OX_ID: 0x%x rc: 0x%x rce: 0x%x",
> +			 fabric_state, ba_rjt->fchdr.ox_id,
> +			 ba_rjt->reason_code, ba_rjt->reason_explanation);
> +	}
> +
> +	/* currently error handling/retry logic is same for ABTS BA_ACC & BA_RJT */
> +	switch (fabric_state) {
> +	case FDLS_STATE_FABRIC_FLOGI:
> +		if (fchdr->ox_id == FNIC_FLOGI_OXID) {
> +			if (iport->fabric.retry_counter < iport->max_flogi_retries)
> +				fdls_send_fabric_flogi(iport);
> +			else
> +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +						 "Exceeded max FLOGI retries");
> +		} else {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "Unknown abts rsp OX_ID: 0x%x FABRIC_FLOGI state. Drop frame",
> +				 fchdr->ox_id);
> +		}
> +		break;
> +	case FDLS_STATE_FABRIC_LOGO:
> +		if (fchdr->ox_id == FNIC_FLOGO_REQ_OXID) {
> +			if (!RETRIES_EXHAUSTED(iport))
> +				fdls_send_fabric_logo(iport);
> +		} else {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "Unknown abts rsp OX_ID: 0x%x FABRIC_FLOGI state. Drop frame",
> +				 fchdr->ox_id);
> +		}
> +		break;
> +	case FDLS_STATE_FABRIC_PLOGI:
> +		if (fchdr->ox_id == FNIC_PLOGI_FABRIC_OXID) {
> +			if (iport->fabric.retry_counter < iport->max_plogi_retries)
> +				fdls_send_fabric_plogi(iport);
> +			else
> +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "Exceeded max PLOGI retries");
> +		} else {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "Unknown abts rsp OX_ID: 0x%x FABRIC_PLOGI state. Drop frame",
> +				 fchdr->ox_id);
> +		}
> +		break;
> +
> +	case FDLS_STATE_RPN_ID:
> +		if (fchdr->ox_id == FNIC_RPN_REQ_OXID) {
> +			if (iport->fabric.retry_counter < FDLS_RETRY_COUNT) {
> +				fdls_send_rpn_id(iport);
> +			} else {
> +				/* go back to fabric Plogi */
> +				fnic_fdls_start_plogi(iport);
> +			}
> +		} else {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "Unknown abts rsp OX_ID: 0x%x RPN_ID state. Drop frame",
> +				 fchdr->ox_id);
> +		}
> +		break;
> +
> +	case FDLS_STATE_SCR:
> +		if (fchdr->ox_id == FNIC_SCR_REQ_OXID) {
> +			if (iport->fabric.retry_counter <= FDLS_RETRY_COUNT)
> +				fdls_send_scr(iport);
> +			else {
> +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "abts rsp fab SCR after two tries. Start fabric PLOGI %p",
> +					 iport);
> +				fnic_fdls_start_plogi(iport);	/* go back to fabric Plogi */
> +			}
> +		} else {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "Unknown abts rsp OX_ID: 0x%x SCR state. Drop frame",
> +				 fchdr->ox_id);
> +		}
> +		break;
> +	case FDLS_STATE_REGISTER_FC4_TYPES:
> +		if (fchdr->ox_id == FNIC_RFT_REQ_OXID) {
> +			if (iport->fabric.retry_counter <= FDLS_RETRY_COUNT) {
> +				fdls_send_register_fc4_types(iport);
> +			} else {
> +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "abts rsp fab RFT_ID two tries. Start fabric PLOGI %p",
> +					 iport);
> +				fnic_fdls_start_plogi(iport);	/* go back to fabric Plogi */
> +			}
> +		} else {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "Unknown abts rsp OX_ID: 0x%x RFT state. Drop frame",
> +				 fchdr->ox_id);
> +		}
> +		break;
> +	case FDLS_STATE_REGISTER_FC4_FEATURES:
> +		if (fchdr->ox_id == FNIC_RFF_REQ_OXID) {
> +			if (iport->fabric.retry_counter <= FDLS_RETRY_COUNT)
> +				fdls_send_register_fc4_features(iport);
> +			else {
> +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "abts rsp fab SCR after two tries. Start fabric PLOGI %p",
> +					 iport);
> +				fnic_fdls_start_plogi(iport);	/* go back to fabric Plogi */
> +			}
> +		} else {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "Unknown abts rsp OX_ID: 0x%x RFF state. Drop frame",
> +				 fchdr->ox_id);
> +		}
> +		break;
> +
> +	case FDLS_STATE_GPN_FT:
> +		if (fchdr->ox_id == FNIC_GPN_FT_OXID) {
> +			if (iport->fabric.retry_counter <= FDLS_RETRY_COUNT) {
> +				fdls_send_gpn_ft(iport, fabric_state);
> +			} else {
> +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "abts rsp fab GPN_FT after two tries %p",
> +					 iport);
> +			}
> +		} else {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "Unknown abts rsp OX_ID: 0x%x GPN_FT state. Drop frame",
> +				 fchdr->ox_id);
> +		}
> +		break;
> +
> +	default:
> +		return;
> +	}
> +}
> +
> +/*
> + * Performs a validation for all FCOE frames and return the frame type
> + */
> +int
> +fnic_fdls_validate_and_get_frame_type(struct fnic_iport_s *iport,
> +									  void *rx_frame, int len,
> +									  int fchdr_offset)
> +{
> +	struct fc_hdr_s *fchdr;
> +	uint8_t type;
> +	uint8_t *fc_payload;
> +	uint16_t oxid;
> +	uint32_t s_id;
> +	uint32_t d_id;
> +	struct fnic *fnic = iport->fnic;
> +	struct fnic_fdls_fabric_s *fabric = &iport->fabric;
> +
> +	fchdr = (struct fc_hdr_s *) ((uint8_t *) rx_frame + fchdr_offset);
> +	oxid = FNIC_GET_OX_ID(fchdr);
> +	fc_payload = (uint8_t *) fchdr + sizeof(struct fc_hdr_s);
> +	type = *fc_payload;
> +	s_id = ntoh24(fchdr->sid);
> +	d_id = ntoh24(fchdr->did);
> +
> +	/* some common validation */
> +	if (iport->fcid)
> +		if (fdls_get_state(fabric) > FDLS_STATE_FABRIC_FLOGI) {
> +			if ((iport->fcid != d_id) || (!FNIC_FC_FRAME_CS_CTL(fchdr))) {
> +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +							 "invalid frame received. Dropping frame");
> +				return -1;
> +			}
> +		}
> +
> +	/*  ABTS response */
> +	if ((fchdr->r_ctl == FNIC_BA_ACC_RCTL)
> +		|| (fchdr->r_ctl == FNIC_BA_RJT_RCTL)) {
> +		if (!(FNIC_FC_FRAME_TYPE_BLS(fchdr))) {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +						 "Received ABTS invalid frame. Dropping frame");
> +			return -1;
> +
> +		}
> +		return FNIC_BLS_ABTS_RSP;
> +	}
> +	if ((fchdr->r_ctl == FC_ABTS_RCTL) && (FNIC_FC_FRAME_TYPE_BLS(fchdr))) {
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "Receiving Abort Request from s_id: 0x%x", s_id);
> +		return FNIC_BLS_ABTS_REQ;
> +	}
> +
> +	/* unsolicited requests frames */
> +	if (FNIC_FC_FRAME_UNSOLICITED(fchdr)) {
> +		switch (type) {
> +		case FC_ELS_LOGO:
> +			if ((!FNIC_FC_FRAME_FCTL_FIRST_LAST_SEQINIT(fchdr))
> +				|| (!FNIC_FC_FRAME_UNSOLICITED(fchdr))
> +				|| (!FNIC_FC_FRAME_TYPE_ELS(fchdr))) {
> +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +							 "Received LOGO invalid frame. Dropping frame");
> +				return -1;
> +			}
> +			return FNIC_ELS_LOGO_REQ;
> +		case FC_ELS_RSCN:
> +			if ((!FNIC_FC_FRAME_FCTL_FIRST_LAST_SEQINIT(fchdr))
> +				|| (!FNIC_FC_FRAME_TYPE_ELS(fchdr))
> +				|| (!FNIC_FC_FRAME_UNSOLICITED(fchdr))) {
> +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +						 "Received RSCN invalid FCTL. Dropping frame");
> +				return -1;
> +			}
> +			if (s_id != FC_FABRIC_CONTROLLER)
> +				return FNIC_ELS_RSCN_REQ;
> +			break;
> +		case FC_ELS_PLOGI_REQ:
> +			return FNIC_ELS_PLOGI_REQ;
> +		case FC_ELS_ECHO_REQ:
> +			return FNIC_ELS_ECHO_REQ;
> +		case FNIC_ELS_ADISC_REQ:
> +			return FNIC_ELS_ADISC;
> +		case FC_ELS_RLS_REQ:
> +			return FNIC_ELS_RLS;
> +		case FC_ELS_RRQ_REQ:
> +			return FNIC_ELS_RRQ;
> +		default:
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "Unsupported frame (type:0x%02x) from fcid: 0x%x",
> +				 type, s_id);
> +			return FNIC_ELS_UNSUPPORTED_REQ;
> +		}
> +	}
> +
> +	/*response from fabric */
> +	switch (oxid) {
> +
> +	case FNIC_FLOGO_REQ_OXID:
> +		return FNIC_FABRIC_LOGO_RSP;
> +
> +	case FNIC_FLOGI_OXID:
> +		if (type == FC_LS_ACC) {
> +			if ((s_id != FC_DOMAIN_CONTR)
> +				|| (!FNIC_FC_FRAME_TYPE_ELS(fchdr))) {
> +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "Received unknown frame. Dropping frame");
> +				return -1;
> +			}
> +		}
> +		return FNIC_FABRIC_FLOGI_RSP;
> +
> +	case FNIC_PLOGI_FABRIC_OXID:
> +		if (type == FC_LS_ACC) {
> +			if ((s_id != FC_DIR_SERVER)
> +				|| (!FNIC_FC_FRAME_TYPE_ELS(fchdr))) {
> +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "Received unknown frame. Dropping frame");
> +				return -1;
> +			}
> +		}
> +		return FNIC_FABRIC_PLOGI_RSP;
> +
> +	case FNIC_SCR_REQ_OXID:
> +		if (type == FC_LS_ACC) {
> +			if ((s_id != FC_FABRIC_CONTROLLER)
> +				|| (!FNIC_FC_FRAME_TYPE_ELS(fchdr))) {
> +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "Received unknown frame. Dropping frame");
> +				return -1;
> +			}
> +		}
> +		return FNIC_FABRIC_SCR_RSP;
> +
> +	case FNIC_RPN_REQ_OXID:
> +		if ((s_id != FC_DIR_SERVER) || (!FNIC_FC_FRAME_TYPE_FC_GS(fchdr))) {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "Received unknown frame. Dropping frame");
> +			return -1;
> +		}
> +		return FNIC_FABRIC_RPN_RSP;
> +	case FNIC_RFT_REQ_OXID:
> +		if ((s_id != FC_DIR_SERVER) || (!FNIC_FC_FRAME_TYPE_FC_GS(fchdr))) {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "Received unknown frame. Dropping frame");
> +			return -1;
> +		}
> +		return FNIC_FABRIC_RFT_RSP;
> +	case FNIC_RFF_REQ_OXID:
> +		if ((s_id != FC_DIR_SERVER) || (!FNIC_FC_FRAME_TYPE_FC_GS(fchdr))) {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "Received unknown frame. Dropping frame");
> +			return -1;
> +		}
> +		return FNIC_FABRIC_RFF_RSP;
> +
> +	case FNIC_GPN_FT_OXID:
> +		if ((s_id != FC_DIR_SERVER) || (!FNIC_FC_FRAME_TYPE_FC_GS(fchdr))) {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "Received unknown frame. Dropping frame");
> +			return -1;
> +		}
> +		return FNIC_FABRIC_GPN_FT_RSP;
> +
> +	default:
> +		/* Drop the Rx frame and log/stats it */
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "Solicited response: unknown OXID: 0x%x", oxid);
> +		return -1;
> +	}
> +	return -1;
> +}
> +
> +void fnic_fdls_recv_frame(struct fnic_iport_s *iport, void *rx_frame,
> +						  int len, int fchdr_offset)
> +{
> +	uint16_t oxid;
> +	struct fc_hdr_s *fchdr;
> +	uint32_t s_id = 0;
> +	uint32_t d_id = 0;
> +	struct fnic *fnic = iport->fnic;
> +	int frame_type;
> +
> +	fchdr = (struct fc_hdr_s *) ((uint8_t *) rx_frame + fchdr_offset);
> +	s_id = ntoh24(fchdr->sid);
> +	d_id = ntoh24(fchdr->did);
> +
> +	frame_type =
> +		fnic_fdls_validate_and_get_frame_type(iport, rx_frame, len,
> +					  fchdr_offset);
> +
> +	/*if we are in flogo drop everything else */
> +	if (iport->fabric.state == FDLS_STATE_FABRIC_LOGO &&
> +		frame_type != FNIC_FABRIC_LOGO_RSP)
> +		return;
> +
> +	switch (frame_type) {
> +	case FNIC_FABRIC_FLOGI_RSP:
> +		fdls_process_flogi_rsp(iport, fchdr, rx_frame);
> +		break;
> +	case FNIC_FABRIC_PLOGI_RSP:
> +		fdls_process_fabric_plogi_rsp(iport, fchdr);
> +		break;
> +	case FNIC_FABRIC_RPN_RSP:
> +		fdls_process_rpn_id_rsp(iport, fchdr);
> +		break;
> +	case FNIC_FABRIC_RFT_RSP:
> +		fdls_process_rft_id_rsp(iport, fchdr);
> +		break;
> +	case FNIC_FABRIC_RFF_RSP:
> +		fdls_process_rff_id_rsp(iport, fchdr);
> +		break;
> +	case FNIC_FABRIC_SCR_RSP:
> +		fdls_process_scr_rsp(iport, fchdr);
> +		break;
> +	case FNIC_FABRIC_GPN_FT_RSP:
> +		fdls_process_gpn_ft_rsp(iport, fchdr, len);
> +		break;
> +	case FNIC_FABRIC_LOGO_RSP:
> +		fdls_process_fabric_logo_rsp(iport, fchdr);
> +		break;
> +
> +	case FNIC_BLS_ABTS_RSP:
> +		oxid = FNIC_GET_OX_ID(fchdr);
> +		if ((iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)
> +			&& (oxid >= FNIC_FLOGI_OXID && oxid <= FNIC_RFF_REQ_OXID)) {
> +			fdls_process_fabric_abts_rsp(iport, fchdr);
> +		}
> +		break;
> +	default:
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +			 "Received unknown FCoE frame of len: %d. Dropping frame", len);
> +		break;
> +	}
> +}
> diff --git a/drivers/scsi/fnic/fnic.h b/drivers/scsi/fnic/fnic.h
> index ce73f08ee889..2d5f438f2cc4 100644
> --- a/drivers/scsi/fnic/fnic.h
> +++ b/drivers/scsi/fnic/fnic.h
> @@ -24,6 +24,7 @@
>   #include "vnic_intr.h"
>   #include "vnic_stats.h"
>   #include "vnic_scsi.h"
> +#include "fnic_fdls.h"
>   
>   #define DRV_NAME		"fnic"
>   #define DRV_DESCRIPTION		"Cisco FCoE HBA Driver"
> @@ -31,6 +32,7 @@
>   #define PFX			DRV_NAME ": "
>   #define DFX                     DRV_NAME "%d: "
>   
> +#define FABRIC_LOGO_MAX_RETRY 3
>   #define DESC_CLEAN_LOW_WATERMARK 8
>   #define FNIC_UCSM_DFLT_THROTTLE_CNT_BLD	16 /* UCSM default throttle count */
>   #define FNIC_MIN_IO_REQ			256 /* Min IO throttle count */
> @@ -75,6 +77,8 @@
>   #define FNIC_DEV_RST_TERM_DONE          BIT(20)
>   #define FNIC_DEV_RST_ABTS_PENDING       BIT(21)
>   
> +#define IS_FNIC_FCP_INITIATOR(fnic) (fnic->role == FNIC_ROLE_FCP_INITIATOR)
> +
>   /*
>    * fnic private data per SCSI command.
>    * These fields are locked by the hashed io_req_lock.
> @@ -213,12 +217,26 @@ enum fnic_state {
>   
>   struct mempool;
>   
> +enum fnic_role_e {
> +	FNIC_ROLE_FCP_INITIATOR = 0,
> +};
> +
>   enum fnic_evt {
>   	FNIC_EVT_START_VLAN_DISC = 1,
>   	FNIC_EVT_START_FCF_DISC = 2,
>   	FNIC_EVT_MAX,
>   };
>   
> +struct fnic_frame_list {
> +	/*
> +	 * Link to frame lists
> +	 */
> +	struct list_head links;
> +	void *fp;
> +	int frame_len;
> +	int rx_ethhdr_stripped;
> +};
> +
>   struct fnic_event {
>   	struct list_head list;
>   	struct fnic *fnic;
> @@ -235,6 +253,8 @@ struct fnic_cpy_wq {
>   /* Per-instance private data structure */
>   struct fnic {
>   	int fnic_num;
> +	enum fnic_role_e role;
> +	struct fnic_iport_s iport;
>   	struct fc_lport *lport;
>   	struct fcoe_ctlr ctlr;		/* FIP FCoE controller structure */
>   	struct vnic_dev_bar bar0;
> @@ -278,6 +298,7 @@ struct fnic {
>   	unsigned long state_flags;	/* protected by host lock */
>   	enum fnic_state state;
>   	spinlock_t fnic_lock;
> +	unsigned long lock_flags;
>   
>   	u16 vlan_id;	                /* VLAN tag including priority */
>   	u8 data_src_addr[ETH_ALEN];
> @@ -307,7 +328,7 @@ struct fnic {
>   	struct work_struct frame_work;
>   	struct work_struct flush_work;
>   	struct sk_buff_head frame_queue;
> -	struct sk_buff_head tx_queue;
> +	struct list_head tx_queue;
>   
>   	/*** FIP related data members  -- start ***/
>   	void (*set_vlan)(struct fnic *, u16 vlan);
> @@ -397,7 +418,6 @@ void fnic_handle_fip_frame(struct work_struct *work);
>   void fnic_handle_fip_event(struct fnic *fnic);
>   void fnic_fcoe_reset_vlans(struct fnic *fnic);
>   void fnic_fcoe_evlist_free(struct fnic *fnic);
> -extern void fnic_handle_fip_timer(struct fnic *fnic);
>   
>   static inline int
>   fnic_chk_state_flags_locked(struct fnic *fnic, unsigned long st_flags)
> @@ -406,4 +426,6 @@ fnic_chk_state_flags_locked(struct fnic *fnic, unsigned long st_flags)
>   }
>   void __fnic_set_state_flags(struct fnic *, unsigned long, unsigned long);
>   void fnic_dump_fchost_stats(struct Scsi_Host *, struct fc_host_statistics *);
> +void fnic_free_txq(struct list_head *head);
> +
>   #endif /* _FNIC_H_ */
> diff --git a/drivers/scsi/fnic/fnic_fcs.c b/drivers/scsi/fnic/fnic_fcs.c
> index a08293b2ad9f..90d0c4c8920c 100644
> --- a/drivers/scsi/fnic/fnic_fcs.c
> +++ b/drivers/scsi/fnic/fnic_fcs.c
> @@ -20,6 +20,8 @@
>   #include "fnic_io.h"
>   #include "fnic.h"
>   #include "fnic_fip.h"
> +#include "fnic_fdls.h"
> +#include "fdls_fc.h"
>   #include "cq_enet_desc.h"
>   #include "cq_exch_desc.h"
>   
> @@ -28,12 +30,90 @@ struct workqueue_struct *fnic_fip_queue;
>   struct workqueue_struct *fnic_event_queue;
>   
>   static void fnic_set_eth_mode(struct fnic *);
> -static void fnic_fcoe_send_vlan_req(struct fnic *fnic);
>   static void fnic_fcoe_start_fcf_disc(struct fnic *fnic);
>   static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *);
>   static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag);
>   static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb);
>   
> +/* Frame initialization */
> +/*
> + * Variables:
> + * dst_mac, src_mac
> + */
> +struct fnic_eth_hdr_s fnic_eth_hdr_fcoe = {
> +	.ether_type = 0x0689
> +};
> +
> +/*
> + * Variables:
> + * None
> + */
> +struct fnic_fcoe_hdr_s fnic_fcoe_hdr = {
> +	.sof = 0x2E
> +};
> +
> +uint8_t FCOE_ALL_FCF_MAC[6] = { 0x0e, 0xfc, 0x00, 0xff, 0xff, 0xfe };
> +
> +/*
> + * Internal Functions
> + * This function will initialize the src_mac address to be
> + * used in outgoing frames
> + */
> +static inline void fnic_fdls_set_fcoe_srcmac(struct fnic *fnic,
> +							 uint8_t *src_mac)
> +{
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "Setting src mac: %02x:%02x:%02x:%02x:%02x:%02x",
> +				 src_mac[0], src_mac[1], src_mac[2], src_mac[3],
> +				 src_mac[4], src_mac[5]);
> +
> +	memcpy(fnic->iport.fpma, src_mac, 6);
> +}
> +
> +/*
> + * This function will initialize the dst_mac address to be
> + * used in outgoing frames
> + */
> +static inline  void fnic_fdls_set_fcoe_dstmac(struct fnic *fnic,
> +							 uint8_t *dst_mac)
> +{
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "Setting dst mac: %02x:%02x:%02x:%02x:%02x:%02x",
> +				 dst_mac[0], dst_mac[1], dst_mac[2], dst_mac[3],
> +				 dst_mac[4], dst_mac[5]);
> +
> +	memcpy(fnic->iport.fcfmac, dst_mac, 6);
> +}
> +
> +/*
> + * FPMA can be either taken from ethhdr(dst_mac) or flogi resp
> + * or derive from FC_MAP and FCID combination. While it should be
> + * same, revisit this if there is any possibility of not-correct.
> + */
> +void fnic_fdls_learn_fcoe_macs(struct fnic_iport_s *iport, void *rx_frame,
> +							   uint8_t *fcid)
> +{
> +	struct fnic *fnic = iport->fnic;
> +	struct fnic_eth_hdr_s *ethhdr = (struct fnic_eth_hdr_s *) rx_frame;
> +	uint8_t fcmac[6] = { 0x0E, 0xFC, 0x00, 0x00, 0x00, 0x00 };
> +
> +	memcpy(&fcmac[3], fcid, 3);
> +
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "learn fcoe: dst_mac: %02x:%02x:%02x:%02x:%02x:%02x",
> +				 ethhdr->dst_mac[0], ethhdr->dst_mac[1],
> +				 ethhdr->dst_mac[2], ethhdr->dst_mac[3],
> +				 ethhdr->dst_mac[4], ethhdr->dst_mac[5]);
> +
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "learn fcoe: fc_mac: %02x:%02x:%02x:%02x:%02x:%02x",
> +				 fcmac[0], fcmac[1], fcmac[2], fcmac[3], fcmac[4],
> +				 fcmac[5]);
> +
> +	fnic_fdls_set_fcoe_srcmac(fnic, fcmac);
> +	fnic_fdls_set_fcoe_dstmac(fnic, ethhdr->src_mac);
> +}
> +
>   void fnic_handle_link(struct work_struct *work)
>   {
>   	struct fnic *fnic = container_of(work, struct fnic, link_work);
> @@ -363,7 +443,7 @@ static inline int is_fnic_fip_flogi_reject(struct fcoe_ctlr *fip,
>   	return 0;
>   }
>   
> -static void fnic_fcoe_send_vlan_req(struct fnic *fnic)
> +void fnic_fcoe_send_vlan_req(struct fnic *fnic)
>   {
>   	struct fcoe_ctlr *fip = &fnic->ctlr;
>   	struct fnic_stats *fnic_stats = &fnic->fnic_stats;
> @@ -1068,116 +1148,125 @@ void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
>   /*
>    * Send FC frame.
>    */
> -static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp)
> +static int fnic_send_frame(struct fnic *fnic, void *frame, int frame_len)
>   {
>   	struct vnic_wq *wq = &fnic->wq[0];
> -	struct sk_buff *skb;
>   	dma_addr_t pa;
> -	struct ethhdr *eth_hdr;
> -	struct vlan_ethhdr *vlan_hdr;
> -	struct fcoe_hdr *fcoe_hdr;
> -	struct fc_frame_header *fh;
> -	u32 tot_len, eth_hdr_len;
>   	int ret = 0;
>   	unsigned long flags;
>   
> -	fh = fc_frame_header_get(fp);
> -	skb = fp_skb(fp);
> +	pa = dma_map_single(&fnic->pdev->dev, frame, frame_len, DMA_TO_DEVICE);
>   
> -	if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
> -	    fcoe_ctlr_els_send(&fnic->ctlr, fnic->lport, skb))
> -		return 0;
> +	if ((fnic_fc_trace_set_data(fnic->fnic_num,
> +								FNIC_FC_SEND | 0x80, (char *) frame,
> +								frame_len)) != 0) {

Indentation running amok...

> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "fnic ctlr frame trace error");
> +	}
>   
> -	if (!fnic->vlan_hw_insert) {
> -		eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr);
> -		vlan_hdr = skb_push(skb, eth_hdr_len);
> -		eth_hdr = (struct ethhdr *)vlan_hdr;
> -		vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
> -		vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE);
> -		vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
> -		fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1);
> -	} else {
> -		eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr);
> -		eth_hdr = skb_push(skb, eth_hdr_len);
> -		eth_hdr->h_proto = htons(ETH_P_FCOE);
> -		fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1);
> +	spin_lock_irqsave(&fnic->wq_lock[0], flags);
> +
> +	if (!vnic_wq_desc_avail(wq)) {
> +		dma_unmap_single(&fnic->pdev->dev, pa, frame_len, DMA_TO_DEVICE);
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "vnic work queue descriptor is not available");
> +		ret = -1;
> +		goto fnic_send_frame_end;
>   	}
>   
> -	if (fnic->ctlr.map_dest)
> -		fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
> -	else
> -		memcpy(eth_hdr->h_dest, fnic->ctlr.dest_addr, ETH_ALEN);
> -	memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN);
> +	/* hw inserts cos value */
> +	fnic_queue_wq_desc(wq, frame, pa, frame_len, FNIC_FCOE_EOF,
> +					   0, fnic->vlan_id, 1, 1, 1);
>   
> -	tot_len = skb->len;
> -	BUG_ON(tot_len % 4);
> +fnic_send_frame_end:
> +	spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
> +	return ret;
> +}
>   
> -	memset(fcoe_hdr, 0, sizeof(*fcoe_hdr));
> -	fcoe_hdr->fcoe_sof = fr_sof(fp);
> -	if (FC_FCOE_VER)
> -		FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER);
> +static int
> +fdls_send_fcoe_frame(struct fnic *fnic, void *payload, int payload_sz,
> +					 uint8_t *srcmac, uint8_t *dstmac)
> +{
> +	uint8_t *frame;
> +	struct fnic_eth_hdr_s *ethhdr;
> +	struct fnic_frame_list *frame_elem;
> +	int max_framesz = FNIC_FCOE_FRAME_MAXSZ;
> +	int len = 0;
> +	int ret;
>   
> -	pa = dma_map_single(&fnic->pdev->dev, eth_hdr, tot_len, DMA_TO_DEVICE);
> -	if (dma_mapping_error(&fnic->pdev->dev, pa)) {
> -		ret = -ENOMEM;
> -		printk(KERN_ERR "DMA map failed with error %d\n", ret);
> -		goto free_skb_on_err;
> +	frame = kmalloc(max_framesz, GFP_ATOMIC);
> +	if (!frame) {
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "Failed to allocate frame for flogi\n");
> +		return -ENOMEM;
>   	}
> +	memset(frame, 0, max_framesz);
> +	ethhdr = (struct fnic_eth_hdr_s *) frame;
>   
> -	if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_SEND,
> -				(char *)eth_hdr, tot_len)) != 0) {
> -		printk(KERN_ERR "fnic ctlr frame trace error!!!");
> -	}
> +	memcpy(frame, (uint8_t *) &fnic_eth_hdr_fcoe,
> +		   sizeof(struct fnic_eth_hdr_s));
> +	len = sizeof(struct fnic_eth_hdr_s);
>   
> -	spin_lock_irqsave(&fnic->wq_lock[0], flags);
> +	memcpy(ethhdr->src_mac, srcmac, ETH_ALEN);
> +	memcpy(ethhdr->dst_mac, dstmac, ETH_ALEN);
>   
> -	if (!vnic_wq_desc_avail(wq)) {
> -		dma_unmap_single(&fnic->pdev->dev, pa, tot_len, DMA_TO_DEVICE);
> -		ret = -1;
> -		goto irq_restore;
> -	}
> +	memcpy(frame + len, (uint8_t *) &fnic_fcoe_hdr,
> +		   sizeof(struct fnic_fcoe_hdr_s));
> +	len += sizeof(struct fnic_fcoe_hdr_s);
>   
> -	fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp),
> -			   0 /* hw inserts cos value */,
> -			   fnic->vlan_id, 1, 1, 1);
> +	memcpy(frame + len, (uint8_t *) payload, payload_sz);
> +	len += payload_sz;
>   
> -irq_restore:
> -	spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
> +	/*
> +	 * Queue frame if in a transitional state.
> +	 * This occurs while registering the Port_ID / MAC address after FLOGI.
> +	 */
> +	if ((fnic->state != FNIC_IN_FC_MODE)
> +		&& (fnic->state != FNIC_IN_ETH_MODE)) {
> +		frame_elem = kmalloc(sizeof(struct fnic_frame_list), GFP_ATOMIC);
> +		if (!frame_elem) {
> +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +						 "Failed to allocate memory for fnic_frame_list: %ld\n",
> +						 sizeof(struct fnic_frame_list));
> +			return -ENOMEM;
> +		}
> +		memset(frame_elem, 0, sizeof(struct fnic_frame_list));
>   
> -free_skb_on_err:
> -	if (ret)
> -		dev_kfree_skb_any(fp_skb(fp));
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "Queuing frame: 0x%p\n", frame);
>   
> +		frame_elem->fp = frame;
> +		frame_elem->frame_len = len;
> +		list_add_tail(&frame_elem->links, &fnic->tx_queue);
> +		return 0;
> +	}
> +
> +	ret = fnic_send_frame(fnic, frame, len);
>   	return ret;
>   }
>   
> -/*
> - * fnic_send
> - * Routine to send a raw frame
> - */
> -int fnic_send(struct fc_lport *lp, struct fc_frame *fp)
> +int fnic_send_fcoe_frame(struct fnic_iport_s *iport, void *payload,
> +						 int payload_sz)
>   {
> -	struct fnic *fnic = lport_priv(lp);
> -	unsigned long flags;
> +	struct fnic *fnic = iport->fnic;
> +	uint8_t *dstmac, *srcmac;
> +	int ret = 0;
>   
> +	/* If module unload is in-progress, don't send */
>   	if (fnic->in_remove) {
> -		dev_kfree_skb(fp_skb(fp));
>   		return -1;
>   	}
>   
> -	/*
> -	 * Queue frame if in a transitional state.
> -	 * This occurs while registering the Port_ID / MAC address after FLOGI.
> -	 */
> -	spin_lock_irqsave(&fnic->fnic_lock, flags);
> -	if (fnic->state != FNIC_IN_FC_MODE && fnic->state != FNIC_IN_ETH_MODE) {
> -		skb_queue_tail(&fnic->tx_queue, fp_skb(fp));
> -		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> -		return 0;
> +	if (iport->fabric.flags & FNIC_FDLS_FPMA_LEARNT) {
> +		srcmac = iport->fpma;
> +		dstmac = iport->fcfmac;
> +	} else {
> +		srcmac = iport->hwmac;
> +		dstmac = FCOE_ALL_FCF_MAC;
>   	}
> -	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
>   
> -	return fnic_send_frame(fnic, fp);
> +	ret = fdls_send_fcoe_frame(fnic, payload, payload_sz, srcmac, dstmac);
> +	return ret;
>   }
>   
>   /**
> @@ -1193,13 +1282,64 @@ int fnic_send(struct fc_lport *lp, struct fc_frame *fp)
>   void fnic_flush_tx(struct work_struct *work)
>   {
>   	struct fnic *fnic = container_of(work, struct fnic, flush_work);
> -	struct sk_buff *skb;
>   	struct fc_frame *fp;
> +	struct fnic_frame_list *cur_frame, *next;
>   
> -	while ((skb = skb_dequeue(&fnic->tx_queue))) {
> -		fp = (struct fc_frame *)skb;
> -		fnic_send_frame(fnic, fp);
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "Flush queued frames");
> +
> +	list_for_each_entry_safe(cur_frame, next, &fnic->tx_queue, links) {
> +		fp = cur_frame->fp;
> +		list_del(&cur_frame->links);
> +		fnic_send_frame(fnic, fp, cur_frame->frame_len);
> +	}
> +}
> +
> +int
> +fnic_fdls_register_portid(struct fnic_iport_s *iport, u32 port_id,
> +						  void *fp)
> +{
> +	struct fnic *fnic = iport->fnic;
> +	struct fnic_eth_hdr_s *ethhdr;
> +	int ret;
> +
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "Setting port id: 0x%x fp: 0x%p fnic state: %d", port_id,
> +				 fp, fnic->state);
> +
> +	if (fp) {
> +		ethhdr = (struct fnic_eth_hdr_s *) fp;
> +		vnic_dev_add_addr(fnic->vdev, ethhdr->dst_mac);
> +	}
> +
> +	/* Change state to reflect transition to FC mode */
> +	if (fnic->state == FNIC_IN_ETH_MODE || fnic->state == FNIC_IN_FC_MODE)
> +		fnic->state = FNIC_IN_ETH_TRANS_FC_MODE;
> +	else {
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +			 "Unexpected fnic state while processing FLOGI response\n");
> +		return -1;
>   	}
> +
> +	/*
> +	 * Send FLOGI registration to firmware to set up FC mode.
> +	 * The new address will be set up when registration completes.
> +	 */
> +	ret = fnic_flogi_reg_handler(fnic, port_id);
> +	if (ret < 0) {
> +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +					 "FLOGI registration error ret: %d fnic state: %d\n",
> +					 ret, fnic->state);
> +		if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE)
> +			fnic->state = FNIC_IN_ETH_MODE;
> +
> +		return -1;
> +	}
> +	iport->fabric.flags |= FNIC_FDLS_FPMA_LEARNT;
> +
> +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> +				 "FLOGI registration success\n");
> +	return 0;
>   }
>   
>   /**
> @@ -1240,6 +1380,17 @@ static void fnic_set_eth_mode(struct fnic *fnic)
>   	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
>   }
>   
> +void fnic_free_txq(struct list_head *head)
> +{
> +	struct fnic_frame_list *cur_frame, *next;
> +
> +	list_for_each_entry_safe(cur_frame, next, head, links) {
> +		list_del(&cur_frame->links);
> +		kfree(cur_frame->fp);
> +		kfree(cur_frame);
> +	}
> +}
> +
>   static void fnic_wq_complete_frame_send(struct vnic_wq *wq,
>   					struct cq_desc *cq_desc,
>   					struct vnic_wq_buf *buf, void *opaque)
> @@ -1319,88 +1470,3 @@ void fnic_fcoe_reset_vlans(struct fnic *fnic)
>   	spin_unlock_irqrestore(&fnic->vlans_lock, flags);
>   }
>   
> -void fnic_handle_fip_timer(struct fnic *fnic)
> -{
> -	unsigned long flags;
> -	struct fcoe_vlan *vlan;
> -	struct fnic_stats *fnic_stats = &fnic->fnic_stats;
> -	u64 sol_time;
> -
> -	spin_lock_irqsave(&fnic->fnic_lock, flags);
> -	if (fnic->stop_rx_link_events) {
> -		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> -		return;
> -	}
> -	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> -
> -	if (fnic->ctlr.mode == FIP_MODE_NON_FIP)
> -		return;
> -
> -	spin_lock_irqsave(&fnic->vlans_lock, flags);
> -	if (list_empty(&fnic->vlans)) {
> -		spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> -		/* no vlans available, try again */
> -		if (unlikely(fnic_log_level & FNIC_FCS_LOGGING))
> -			if (printk_ratelimit())
> -				shost_printk(KERN_DEBUG, fnic->lport->host,
> -						"Start VLAN Discovery\n");
> -		fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
> -		return;
> -	}
> -
> -	vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
> -	FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
> -		  "fip_timer: vlan %d state %d sol_count %d\n",
> -		  vlan->vid, vlan->state, vlan->sol_count);
> -	switch (vlan->state) {
> -	case FIP_VLAN_USED:
> -		FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
> -			  "FIP VLAN is selected for FC transaction\n");
> -		spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> -		break;
> -	case FIP_VLAN_FAILED:
> -		spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> -		/* if all vlans are in failed state, restart vlan disc */
> -		if (unlikely(fnic_log_level & FNIC_FCS_LOGGING))
> -			if (printk_ratelimit())
> -				shost_printk(KERN_DEBUG, fnic->lport->host,
> -					  "Start VLAN Discovery\n");
> -		fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
> -		break;
> -	case FIP_VLAN_SENT:
> -		if (vlan->sol_count >= FCOE_CTLR_MAX_SOL) {
> -			/*
> -			 * no response on this vlan, remove  from the list.
> -			 * Try the next vlan
> -			 */
> -			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> -				  "Dequeue this VLAN ID %d from list\n",
> -				  vlan->vid);
> -			list_del(&vlan->list);
> -			kfree(vlan);
> -			vlan = NULL;
> -			if (list_empty(&fnic->vlans)) {
> -				/* we exhausted all vlans, restart vlan disc */
> -				spin_unlock_irqrestore(&fnic->vlans_lock,
> -							flags);
> -				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> -					  "fip_timer: vlan list empty, "
> -					  "trigger vlan disc\n");
> -				fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
> -				return;
> -			}
> -			/* check the next vlan */
> -			vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan,
> -							list);
> -			fnic->set_vlan(fnic, vlan->vid);
> -			vlan->state = FIP_VLAN_SENT; /* sent now */
> -		}
> -		spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> -		atomic64_inc(&fnic_stats->vlan_stats.sol_expiry_count);
> -		vlan->sol_count++;
> -		sol_time = jiffies + msecs_to_jiffies
> -					(FCOE_CTLR_START_DELAY);
> -		mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
> -		break;
> -	}
> -}
> diff --git a/drivers/scsi/fnic/fnic_fdls.h b/drivers/scsi/fnic/fnic_fdls.h
> index fddb9390d022..095275698716 100644
> --- a/drivers/scsi/fnic/fnic_fdls.h
> +++ b/drivers/scsi/fnic/fnic_fdls.h
> @@ -321,17 +321,20 @@ void fnic_fdls_recv_frame(struct fnic_iport_s *iport, void *rx_frame, int len,
>   void fnic_fdls_link_down(struct fnic_iport_s *iport);
>   void fdls_init_tgt_oxid_pool(struct fnic_iport_s *iport);
>   void fdls_tgt_logout(struct fnic_iport_s *iport, struct fnic_tport_s *tport);
> +void fdls_send_fabric_logo(struct fnic_iport_s *iport);
> +int fnic_fdls_validate_and_get_frame_type(struct fnic_iport_s *iport,
> +								  void *rx_frame, int len,
> +								  int fchdr_offset);
>   
>   /* fnic_fcs.c */
>   void fnic_fdls_init(struct fnic *fnic, int usefip);
>   int fnic_send_fcoe_frame(struct fnic_iport_s *iport, void *payload,
>   	int payload_sz);
> -
> +void fnic_fcoe_send_vlan_req(struct fnic *fnic);
>   int fnic_send_fip_frame(struct fnic_iport_s *iport,
>   	void *payload, int payload_sz);
>   void fnic_fdls_learn_fcoe_macs(struct fnic_iport_s *iport, void *rx_frame,
>   	uint8_t *fcid);
> -
>   void fnic_fdls_add_tport(struct fnic_iport_s *iport,
>   		struct fnic_tport_s *tport, unsigned long flags);
>   void fnic_fdls_remove_tport(struct fnic_iport_s *iport,
> diff --git a/drivers/scsi/fnic/fnic_io.h b/drivers/scsi/fnic/fnic_io.h
> index 5895ead20e14..6fe642cb387b 100644
> --- a/drivers/scsi/fnic/fnic_io.h
> +++ b/drivers/scsi/fnic/fnic_io.h
> @@ -55,15 +55,4 @@ struct fnic_io_req {
>   	unsigned int tag;
>   	struct scsi_cmnd *sc; /* midlayer's cmd pointer */
>   };
> -
> -enum fnic_port_speeds {
> -	DCEM_PORTSPEED_NONE = 0,
> -	DCEM_PORTSPEED_1G    = 1000,
> -	DCEM_PORTSPEED_10G   = 10000,
> -	DCEM_PORTSPEED_20G   = 20000,
> -	DCEM_PORTSPEED_25G   = 25000,
> -	DCEM_PORTSPEED_40G   = 40000,
> -	DCEM_PORTSPEED_4x10G = 41000,
> -	DCEM_PORTSPEED_100G  = 100000,
> -};
>   #endif /* _FNIC_IO_H_ */
> diff --git a/drivers/scsi/fnic/fnic_main.c b/drivers/scsi/fnic/fnic_main.c
> index 08730bdf8b03..577048e30c12 100644
> --- a/drivers/scsi/fnic/fnic_main.c
> +++ b/drivers/scsi/fnic/fnic_main.c
> @@ -31,6 +31,8 @@
>   #include "fnic_io.h"
>   #include "fnic_fip.h"
>   #include "fnic.h"
> +#include "fnic_fdls.h"
> +#include "fdls_fc.h"
>   
>   #define PCI_DEVICE_ID_CISCO_FNIC	0x0045
>   
> @@ -80,7 +82,6 @@ module_param(fnic_max_qdepth, uint, S_IRUGO|S_IWUSR);
>   MODULE_PARM_DESC(fnic_max_qdepth, "Queue depth to report for each LUN");
>   
>   static struct libfc_function_template fnic_transport_template = {
> -	.frame_send = fnic_send,
>   	.lport_set_port_id = fnic_set_port_id,
>   	.fcp_abort_io = fnic_empty_scsi_cleanup,
>   	.fcp_cleanup = fnic_empty_scsi_cleanup,
> @@ -413,7 +414,7 @@ static void fnic_fip_notify_timer(struct timer_list *t)
>   {
>   	struct fnic *fnic = from_timer(fnic, t, fip_timer);
>   
> -	fnic_handle_fip_timer(fnic);
> +	/* Placeholder function */
>   }
>   
>   static void fnic_notify_timer_start(struct fnic *fnic)
> @@ -921,7 +922,7 @@ static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
>   	INIT_WORK(&fnic->link_work, fnic_handle_link);
>   	INIT_WORK(&fnic->frame_work, fnic_handle_frame);
>   	skb_queue_head_init(&fnic->frame_queue);
> -	skb_queue_head_init(&fnic->tx_queue);
> +	INIT_LIST_HEAD(&fnic->tx_queue);
>   
>   	fc_fabric_login(lp);
>   
> @@ -1004,7 +1005,7 @@ static void fnic_remove(struct pci_dev *pdev)
>   	 */
>   	flush_workqueue(fnic_event_queue);
>   	skb_queue_purge(&fnic->frame_queue);
> -	skb_queue_purge(&fnic->tx_queue);
> +	fnic_free_txq(&fnic->tx_queue);
>   
>   	if (fnic->config.flags & VFCF_FIP_CAPABLE) {
>   		del_timer_sync(&fnic->fip_timer);
> @@ -1036,7 +1037,6 @@ static void fnic_remove(struct pci_dev *pdev)
>   	fnic_cleanup(fnic);
>   
>   	BUG_ON(!skb_queue_empty(&fnic->frame_queue));
> -	BUG_ON(!skb_queue_empty(&fnic->tx_queue));
>   
>   	spin_lock_irqsave(&fnic_list_lock, flags);
>   	list_del(&fnic->list);
> diff --git a/drivers/scsi/fnic/fnic_scsi.c b/drivers/scsi/fnic/fnic_scsi.c
> index 2ba61dba4569..295dcda4ec16 100644
> --- a/drivers/scsi/fnic/fnic_scsi.c
> +++ b/drivers/scsi/fnic/fnic_scsi.c
> @@ -184,7 +184,7 @@ int fnic_fw_reset_handler(struct fnic *fnic)
>   	fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET);
>   
>   	skb_queue_purge(&fnic->frame_queue);
> -	skb_queue_purge(&fnic->tx_queue);
> +	fnic_free_txq(&fnic->tx_queue);
>   
>   	/* wait for io cmpl */
>   	while (atomic_read(&fnic->in_flight))
> @@ -674,7 +674,7 @@ static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
>   	 */
>   	if (fnic->remove_wait || ret) {
>   		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> -		skb_queue_purge(&fnic->tx_queue);
> +		fnic_free_txq(&fnic->tx_queue);
>   		goto reset_cmpl_handler_end;
>   	}
>   
> @@ -1717,7 +1717,7 @@ static bool fnic_rport_abort_io_iter(struct scsi_cmnd *sc, void *data)
>   	return true;
>   }
>   
> -static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
> +void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
>   {
>   	struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
>   	struct fnic_rport_abort_io_iter_data iter_data = {

Cheers,

Hannes
kernel test robot June 11, 2024, 4:12 p.m. UTC | #2 
Hi Karan,

kernel test robot noticed the following build warnings:

[auto build test WARNING on mkp-scsi/for-next]
[also build test WARNING on jejb-scsi/for-next linus/master v6.10-rc3 next-20240611]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Karan-Tilak-Kumar/scsi-fnic-Replace-shost_printk-with-pr_info-pr_err/20240611-060227
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git for-next
patch link:    https://lore.kernel.org/r/20240610215100.673158-4-kartilak%40cisco.com
patch subject: [PATCH 03/14] scsi: fnic: Add support for fabric based solicited requests and responses
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20240611/202406112309.8GiDUvIM-lkp@intel.com/config)
compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240611/202406112309.8GiDUvIM-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202406112309.8GiDUvIM-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/scsi/fnic/fdls_disc.c:894:10: warning: variable 'reason_code' set but not used [-Wunused-but-set-variable]
     894 |         uint8_t reason_code;
         |                 ^
>> drivers/scsi/fnic/fdls_disc.c:1009:26: warning: variable 'els_rjt' set but not used [-Wunused-but-set-variable]
    1009 |         struct fc_els_reject_s *els_rjt;
         |                                 ^
>> drivers/scsi/fnic/fdls_disc.c:1520:11: warning: variable 's_id' set but not used [-Wunused-but-set-variable]
    1520 |         uint32_t s_id = 0;
         |                  ^
>> drivers/scsi/fnic/fdls_disc.c:1521:11: warning: variable 'd_id' set but not used [-Wunused-but-set-variable]
    1521 |         uint32_t d_id = 0;
         |                  ^
   drivers/scsi/fnic/fdls_disc.c:627:13: warning: unused function 'fnic_fdls_start_flogi' [-Wunused-function]
     627 | static void fnic_fdls_start_flogi(struct fnic_iport_s *iport)
         |             ^~~~~~~~~~~~~~~~~~~~~
   5 warnings generated.


vim +/els_rjt +1009 drivers/scsi/fnic/fdls_disc.c

  1000	
  1001	static void
  1002	fdls_process_flogi_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr,
  1003						   void *rx_frame)
  1004	{
  1005		struct fnic_fdls_fabric_s *fabric = &iport->fabric;
  1006		struct fc_els_s *flogi_rsp = (struct fc_els_s *) fchdr;
  1007		uint8_t *fcid;
  1008		int rdf_size;
> 1009		struct fc_els_reject_s *els_rjt;
  1010		uint8_t fcmac[6] = { 0x0E, 0XFC, 0x00, 0x00, 0x00, 0x00 };
  1011		struct fnic *fnic = iport->fnic;
  1012	
  1013		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
  1014					 "0x%x: FDLS processing FLOGI response", iport->fcid);
  1015	
  1016		if (fdls_get_state(fabric) != FDLS_STATE_FABRIC_FLOGI) {
  1017			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
  1018						 "FLOGI response received in state (%d). Dropping frame",
  1019						 fdls_get_state(fabric));
  1020			return;
  1021		}
  1022	
  1023		switch (flogi_rsp->command) {
  1024		case FC_LS_ACC:
  1025			if (iport->fabric.timer_pending) {
  1026				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
  1027							 "iport fcid: 0x%x Canceling fabric disc timer\n",
  1028							 iport->fcid);
  1029				fnic_del_fabric_timer_sync();
  1030			}
  1031	
  1032			iport->fabric.timer_pending = 0;
  1033			iport->fabric.retry_counter = 0;
  1034			fcid = FNIC_GET_D_ID(fchdr);
  1035			iport->fcid = ntoh24(fcid);
  1036			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
  1037						 "0x%x: FLOGI response accepted", iport->fcid);
  1038	
  1039			/* Learn the Service Params */
  1040			rdf_size = ntohs(flogi_rsp->u.csp_flogi.b2b_rdf_size);
  1041			if ((rdf_size >= FNIC_MIN_DATA_FIELD_SIZE)
  1042				&& (rdf_size < FNIC_FC_MAX_PAYLOAD_LEN))
  1043				iport->max_payload_size = MIN(rdf_size,
  1044									  iport->max_payload_size);
  1045	
  1046			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
  1047						 "max_payload_size from fabric: %d set: %d", rdf_size,
  1048						 iport->max_payload_size);
  1049	
  1050			iport->r_a_tov = ntohl(flogi_rsp->u.csp_flogi.r_a_tov);
  1051			iport->e_d_tov = ntohl(flogi_rsp->u.csp_flogi.e_d_tov);
  1052	
  1053			if (flogi_rsp->u.csp_flogi.features & FNIC_FC_EDTOV_NSEC)
  1054				iport->e_d_tov = iport->e_d_tov / FNIC_NSEC_TO_MSEC;
  1055	
  1056			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
  1057						 "From fabric: R_A_TOV: %d E_D_TOV: %d",
  1058						 iport->r_a_tov, iport->e_d_tov);
  1059	
  1060			if (IS_FNIC_FCP_INITIATOR(fnic)) {
  1061				fc_host_fabric_name(iport->fnic->lport->host) =
  1062					get_unaligned_be64(&flogi_rsp->node_name);
  1063				fc_host_port_id(iport->fnic->lport->host) = iport->fcid;
  1064			}
  1065	
  1066			fnic_fdls_learn_fcoe_macs(iport, rx_frame, fcid);
  1067	
  1068			memcpy(&fcmac[3], fcid, 3);
  1069			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
  1070				 "Adding vNIC device MAC addr: %02x:%02x:%02x:%02x:%02x:%02x",
  1071				 fcmac[0], fcmac[1], fcmac[2], fcmac[3], fcmac[4],
  1072				 fcmac[5]);
  1073			vnic_dev_add_addr(iport->fnic->vdev, fcmac);
  1074	
  1075			if (fdls_get_state(fabric) == FDLS_STATE_FABRIC_FLOGI) {
  1076				fnic_fdls_start_plogi(iport);
  1077				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
  1078							 "FLOGI response received. Starting PLOGI");
  1079			} else {
  1080				/* From FDLS_STATE_FABRIC_FLOGI state fabric can only go to
  1081				 * FDLS_STATE_LINKDOWN
  1082				 * state, hence we don't have to worry about undoing:
  1083				 * the fnic_fdls_register_portid and vnic_dev_add_addr
  1084				 */
  1085				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
  1086					 "FLOGI response received in state (%d). Dropping frame",
  1087					 fdls_get_state(fabric));
  1088			}
  1089			break;
  1090	
  1091		case FC_LS_REJ:
  1092			els_rjt = (struct fc_els_reject_s *) fchdr;
  1093			if (fabric->retry_counter < iport->max_flogi_retries) {
  1094				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
  1095					 "FLOGI returned FC_LS_REJ BUSY. Retry from timer routine %p",
  1096					 iport);
  1097	
  1098				/* Retry Flogi again from the timer routine. */
  1099				fabric->flags |= FNIC_FDLS_RETRY_FRAME;
  1100	
  1101			} else {
  1102				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
  1103						 "FLOGI returned FC_LS_REJ. Halting discovery %p", iport);
  1104				if (iport->fabric.timer_pending) {
  1105					FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
  1106								 "iport 0x%p Canceling fabric disc timer\n",
  1107								 iport);
  1108					fnic_del_fabric_timer_sync();
  1109				}
  1110				fabric->timer_pending = 0;
  1111				fabric->retry_counter = 0;
  1112			}
  1113			break;
  1114	
  1115		default:
  1116			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
  1117						 "FLOGI response not accepted: 0x%x",
  1118						 flogi_rsp->command);
  1119			break;
  1120		}
  1121	}
  1122
kernel test robot June 11, 2024, 6:38 p.m. UTC | #3 
Hi Karan,

kernel test robot noticed the following build warnings:

[auto build test WARNING on mkp-scsi/for-next]
[also build test WARNING on jejb-scsi/for-next linus/master v6.10-rc3 next-20240611]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Karan-Tilak-Kumar/scsi-fnic-Replace-shost_printk-with-pr_info-pr_err/20240611-060227
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git for-next
patch link:    https://lore.kernel.org/r/20240610215100.673158-4-kartilak%40cisco.com
patch subject: [PATCH 03/14] scsi: fnic: Add support for fabric based solicited requests and responses
config: i386-allmodconfig (https://download.01.org/0day-ci/archive/20240612/202406120201.VakI9Dly-lkp@intel.com/config)
compiler: gcc-13 (Ubuntu 13.2.0-4ubuntu3) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240612/202406120201.VakI9Dly-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202406120201.VakI9Dly-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/scsi/fnic/fnic_fcs.c:21:
   drivers/scsi/fnic/fnic_fcs.c: In function 'fdls_send_fcoe_frame':
>> drivers/scsi/fnic/fnic.h:159:33: warning: format '%ld' expects argument of type 'long int', but argument 7 has type 'unsigned int' [-Wformat=]
     159 |                                 "fnic<%d>: %s: %d: " fmt, fnic_num,\
         |                                 ^~~~~~~~~~~~~~~~~~~~
   drivers/scsi/fnic/fnic.h:146:25: note: in definition of macro 'FNIC_CHECK_LOGGING'
     146 |                         CMD;                                    \
         |                         ^~~
   include/scsi/scsi_host.h:738:9: note: in expansion of macro 'dev_printk'
     738 |         dev_printk(prefix, &(shost)->shost_gendev, fmt, ##a)
         |         ^~~~~~~~~~
   drivers/scsi/fnic/fnic.h:158:26: note: in expansion of macro 'shost_printk'
     158 |                          shost_printk(kern_level, host,                 \
         |                          ^~~~~~~~~~~~
   drivers/scsi/fnic/fnic_fcs.c:1228:25: note: in expansion of macro 'FNIC_FCS_DBG'
    1228 |                         FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
         |                         ^~~~~~~~~~~~


vim +159 drivers/scsi/fnic/fnic.h

5df6d737dd4b0fe Abhijeet Joglekar 2009-04-17  149  
3df9dd0d51c2e4b Karan Tilak Kumar 2023-12-11  150  #define FNIC_MAIN_DBG(kern_level, host, fnic_num, fmt, args...)		\
5df6d737dd4b0fe Abhijeet Joglekar 2009-04-17  151  	FNIC_CHECK_LOGGING(FNIC_MAIN_LOGGING,			\
3df9dd0d51c2e4b Karan Tilak Kumar 2023-12-11  152  			 shost_printk(kern_level, host,			\
3df9dd0d51c2e4b Karan Tilak Kumar 2023-12-11  153  				"fnic<%d>: %s: %d: " fmt, fnic_num,\
3df9dd0d51c2e4b Karan Tilak Kumar 2023-12-11  154  				__func__, __LINE__, ##args);)
5df6d737dd4b0fe Abhijeet Joglekar 2009-04-17  155  
3df9dd0d51c2e4b Karan Tilak Kumar 2023-12-11  156  #define FNIC_FCS_DBG(kern_level, host, fnic_num, fmt, args...)		\
5df6d737dd4b0fe Abhijeet Joglekar 2009-04-17  157  	FNIC_CHECK_LOGGING(FNIC_FCS_LOGGING,			\
3df9dd0d51c2e4b Karan Tilak Kumar 2023-12-11  158  			 shost_printk(kern_level, host,			\
3df9dd0d51c2e4b Karan Tilak Kumar 2023-12-11 @159  				"fnic<%d>: %s: %d: " fmt, fnic_num,\
3df9dd0d51c2e4b Karan Tilak Kumar 2023-12-11  160  				__func__, __LINE__, ##args);)
5df6d737dd4b0fe Abhijeet Joglekar 2009-04-17  161
Karan Tilak Kumar June 17, 2024, 7:36 p.m. UTC | #4 
On Tuesday, June 11, 2024 12:09 AM, Hannes Reinecke <hare@suse.de> wrote:
> 
> On 6/10/24 23:50, Karan Tilak Kumar wrote:
> > Add fdls_disc.c to support fabric based solicited requests
> > and responses.
> > Clean up obsolete code but keep the function template so
> > as to not break compilation.
> > Remove duplicate definitions from header files.
> > Modify definitions of data members.
> > 
> > Reviewed-by: Sesidhar Baddela <sebaddel@cisco.com>
> > Reviewed-by: Arulprabhu Ponnusamy <arulponn@cisco.com>
> > Reviewed-by: Gian Carlo Boffa <gcboffa@cisco.com>
> > Signed-off-by: Karan Tilak Kumar <kartilak@cisco.com>
> > ---
> >   drivers/scsi/fnic/Makefile    |    1 +
> >   drivers/scsi/fnic/fdls_disc.c | 1576 +++++++++++++++++++++++++++++++++
> >   drivers/scsi/fnic/fnic.h      |   26 +-
> >   drivers/scsi/fnic/fnic_fcs.c  |  404 +++++----
> >   drivers/scsi/fnic/fnic_fdls.h |    7 +-
> >   drivers/scsi/fnic/fnic_io.h   |   11 -
> >   drivers/scsi/fnic/fnic_main.c |   10 +-
> >   drivers/scsi/fnic/fnic_scsi.c |    6 +-
> >   8 files changed, 1849 insertions(+), 192 deletions(-)
> >   create mode 100644 drivers/scsi/fnic/fdls_disc.c
> > 
> > diff --git a/drivers/scsi/fnic/Makefile b/drivers/scsi/fnic/Makefile
> > index 6214a6b2e96d..3bd6b1c8b643 100644
> > --- a/drivers/scsi/fnic/Makefile
> > +++ b/drivers/scsi/fnic/Makefile
> > @@ -7,6 +7,7 @@ fnic-y	:= \
> >   	fnic_main.o \
> >   	fnic_res.o \
> >   	fnic_fcs.o \
> > +	fdls_disc.o \
> >   	fnic_scsi.o \
> >   	fnic_trace.o \
> >   	fnic_debugfs.o \
> > diff --git a/drivers/scsi/fnic/fdls_disc.c b/drivers/scsi/fnic/fdls_disc.c
> > new file mode 100644
> > index 000000000000..22a2d0c1c78f
> > --- /dev/null
> > +++ b/drivers/scsi/fnic/fdls_disc.c
> > @@ -0,0 +1,1576 @@
> > +// SPDX-License-Identifier: GPL-2.0-only
> > +/*
> > + * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
> > + * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
> > + */
> > +
> > +#include <linux/workqueue.h>
> > +#include "fnic.h"
> > +#include "fdls_fc.h"
> > +#include "fnic_fdls.h"
> > +#include <scsi/fc/fc_fcp.h>
> > +#include <linux/utsname.h>
> > +
> > +static void fdls_send_rpn_id(struct fnic_iport_s *iport);
> > +
> > +/* Frame initialization */
> > +/*
> > + * Variables:
> > + * sid
> > + */
> > +struct fc_els_s fnic_flogi_req = {
> > +	.fchdr = {.r_ctl = 0x22, .did = {0xFF,  0xFF,  0xFE},
> > +			  .type = 0x01, .f_ctl = FNIC_ELS_REQ_FCTL,
> > +			  .ox_id = FNIC_FLOGI_OXID, .rx_id = 0xFFFF},
> > +	.command = FC_ELS_FLOGI_REQ,
> > +	.u.csp_flogi = {.fc_ph_ver = FNIC_FC_PH_VER,
> > +					.b2b_credits = FNIC_FC_B2B_CREDIT,
> > +					.b2b_rdf_size = FNIC_FC_B2B_RDF_SZ},
> > +	.spc3 = {0x88, 0x00}
> > +};
> > +
> > +/*
> > + * Variables:
> > + * sid, did(nport logins), ox_id(nport logins), nport_name, node_name
> > + */
> > +struct fc_els_s fnic_plogi_req = {
> > +	.fchdr = {.r_ctl = 0x22, .did = {0xFF, 0xFF, 0xFC}, .type = 0x01,
> > +			  .f_ctl = FNIC_ELS_REQ_FCTL, .ox_id = FNIC_PLOGI_FABRIC_OXID,
> > +			  .rx_id = 0xFFFF},
> > +	.command = FC_ELS_PLOGI_REQ,
> > +	.u.csp_plogi = {.fc_ph_ver = FNIC_FC_PH_VER,
> > +					.b2b_credits = FNIC_FC_B2B_CREDIT, .features = 0x0080,
> > +					.b2b_rdf_size = FNIC_FC_B2B_RDF_SZ,
> > +					.total_concur_seqs = FNIC_FC_CONCUR_SEQS,
> > +					.ro_info = FNIC_FC_RO_INFO, .e_d_tov = FNIC_E_D_TOV},
> > +	.spc3 = {0x88, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0xFF,
> > +			 0x00, 0x00, 0x00, 0x01, 0x00, 0x00}
> > +};
> > +
> > +/*
> > + * Variables:
> > + * sid, port_id, port_name
> > + */
> > +struct fc_rpn_id_s fnic_rpn_id_req = {
> > +	.fchdr = {.r_ctl = 0x02, .did = {0xFF, 0xFF, 0xFC}, .type = 0x20,
> > +			  .f_ctl = FNIC_ELS_REQ_FCTL, .ox_id = FNIC_RPN_REQ_OXID,
> > +			  .rx_id = 0xFFFF},
> > +	.fc_ct_hdr = {.rev = 0x01, .fs_type = 0xFC, .fs_subtype = 0x02,
> > +				  .command = FC_CT_RPN_CMD}
> > +};
> > +
> > +/*
> > + * Variables:
> > + * fh_s_id, port_id, port_name
> > + */
> > +struct fc_rft_id fnic_rft_id_req = {
> > +	.fchdr = {.r_ctl = 0x02, .did = {0xFF, 0xFF, 0xFC}, .type = 0x20,
> > +			  .f_ctl = FNIC_ELS_REQ_FCTL, .ox_id = FNIC_RFT_REQ_OXID,
> > +			  .rx_id = 0xFFFF},
> > +	.fc_ct_hdr = {.rev = 0x01, .fs_type = 0xFC, .fs_subtype = 0x02,
> > +				  .command = FC_CT_RFT_CMD}
> > +};
> > +
> > +/*
> > + * Variables:
> > + * fh_s_id, port_id, port_name
> > + */
> > +struct fc_rff_id fnic_rff_id_req = {
> > +	.fchdr = {.r_ctl = 0x02, .did = {0xFF, 0xFF, 0xFC}, .type = 0x20,
> > +			  .f_ctl = FNIC_ELS_REQ_FCTL, .ox_id = FNIC_RFF_REQ_OXID,
> > +			  .rx_id = 0xFFFF},
> > +	.fc_ct_hdr = {.rev = 0x01, .fs_type = 0xFC, .fs_subtype = 0x02,
> > +				  .command = FC_CT_RFF_CMD},
> > +	.tgt = 0x2,
> > +	.fc4_type = 0x28
> > +};
> > +
> > +/*
> > + * Variables:
> > + * sid
> > + */
> > +struct fc_gpn_ft_s fnic_gpn_ft_req = {
> > +	.fchdr = {.r_ctl = 0x02, .did = {0xFF, 0xFF, 0xFC}, .type = 0x20,
> > +			  .f_ctl = FNIC_ELS_REQ_FCTL, .ox_id = FNIC_GPN_FT_OXID,
> > +			  .rx_id = 0xFFFF},
> > +	.fc_ct_hdr = {.rev = 0x01, .fs_type = 0xFC, .fs_subtype = 0x02,
> > +				  .command = FC_CT_GPN_FT_CMD},
> > +	.fc4_type = 0x08
> > +};
> > +
> > +/*
> > + * Variables:
> > + * sid
> > + */
> > +struct fc_scr_s fnic_scr_req = {
> > +	.fchdr = {.r_ctl = 0x22, .did = {0xFF, 0xFF, 0xFD}, .type = 0x01,
> > +			  .f_ctl = FNIC_ELS_REQ_FCTL, .ox_id = FNIC_SCR_REQ_OXID,
> > +			  .rx_id = 0xFFFF},
> > +	.command = FC_ELS_SCR,
> > +	.reg_func = 0x03
> > +};
> > +
> > +/*
> > + * Variables:
> > + * did, ox_id, rx_id, fcid, wwpn
> > + */
> > +struct fc_logo_req_s fnic_logo_req = {
> > +	.fchdr = {.r_ctl = 0x22, .type = 0x01,
> > +			  .f_ctl = FNIC_ELS_REQ_FCTL},
> > +	.command = FC_ELS_LOGO,
> > +};
> > +
> > +#define RETRIES_EXHAUSTED(iport)      \
> > +	(iport->fabric.retry_counter == FABRIC_LOGO_MAX_RETRY)
> > +
> > +static void fdls_process_flogi_rsp(struct fnic_iport_s *iport,
> > +		   struct fc_hdr_s *fchdr, void *rx_frame);
> > +static void fnic_fdls_start_plogi(struct fnic_iport_s *iport);
> > +static void fdls_start_fabric_timer(struct fnic_iport_s *iport,
> > +			int timeout);
> > +
> > +static void
> > +fdls_start_fabric_timer(struct fnic_iport_s *iport, int timeout)
> > +{
> > +	u64 fabric_tov;
> > +	struct fnic *fnic = iport->fnic;
> > +
> > +	if (iport->fabric.timer_pending) {
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "iport fcid: 0x%x: Canceling fabric disc timer\n",
> > +					 iport->fcid);
> > +		fnic_del_fabric_timer_sync();
> > +		iport->fabric.timer_pending = 0;
> > +	}
> > +
> > +	if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED))
> > +		iport->fabric.retry_counter++;
> > +
> > +	fabric_tov = jiffies + msecs_to_jiffies(timeout);
> > +	mod_timer(&iport->fabric.retry_timer, round_jiffies(fabric_tov));
> > +	iport->fabric.timer_pending = 1;
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "fabric timer is %d ", timeout);
> > +}
> > +
> > +static void fdls_send_fabric_abts(struct fnic_iport_s *iport)
> > +{
> > +	uint8_t fcid[3];
> > +	struct fnic *fnic = iport->fnic;
> > +	struct fc_hdr_s fc_abts_s = {
> > +		.r_ctl = 0x81,			/* ABTS */
> > +		.did = {0xFF, 0xFF, 0xFF}, .sid = {0x00, 0x00, 0x00}, .cs_ctl =
> > +			0x00, .type = 0x00, .f_ctl = FNIC_REQ_ABTS_FCTL, .seq_id =
> > +			0x00, .df_ctl = 0x00, .seq_cnt = 0x0000, .rx_id = 0xFFFF,
> > +		.param = 0x00000000,	/* bit:0 = 0 Abort a exchange */
> > +	};
> > +
> You have a list of global static frame definitions above, and yet you 
> define another static frame here within the function.
> Please be consistent, and either make this a global definition, too, or 
> move the global definitions into the caller.

Thanks for pointing this out, Hannes. 
I'll make it a global frame  in the next version of changes.

> > +	struct fc_hdr_s *pfc_abts = &fc_abts_s;
> > +
> > +	switch (iport->fabric.state) {
> > +	case FDLS_STATE_FABRIC_LOGO:
> > +		fc_abts_s.ox_id = FNIC_FLOGO_REQ_OXID;
> > +		fc_abts_s.did[2] = 0xFE;
> > +		break;
> > +	case FDLS_STATE_FABRIC_FLOGI:
> > +		fc_abts_s.ox_id = FNIC_FLOGI_OXID;
> > +		fc_abts_s.did[2] = 0xFE;
> > +		break;
> > +
> OMG. I was right. Static oxids.
> 
> Not that I am in any position to judge, but having static
> OXIDs for command types feels decidedly ... odd.
> I do see the motivation behind it (these OXIDs can't be used
> for anything else), yet it also means that you can have only _one_
> of these commands running at any given time.
> And the biggest problem here is that you _cannot_ resend the
> command if you run into a timeout; you have to wait for RA_TOV
> (or worse) to trigger, and essentially have to tear down the
> entire link just to ensure you can re-used the OXID.
> 
> In general I would _strongly_ discourage using static OXIDs.
> Please use a pool of OXIDs, and allocate one from there.

Thanks Hannes. The Cisco team is evaluating a pool-based OXID
approach in the next version of changes.

> > +	case FDLS_STATE_FABRIC_PLOGI:
> > +		hton24(fcid, iport->fcid);
> > +		FNIC_SET_S_ID(pfc_abts, fcid);
> > +		fc_abts_s.ox_id = FNIC_PLOGI_FABRIC_OXID;
> > +		fc_abts_s.did[2] = 0xFC;
> > +		break;
> > +
> > +	case FDLS_STATE_RPN_ID:
> > +		hton24(fcid, iport->fcid);
> > +		FNIC_SET_S_ID(pfc_abts, fcid);
> > +		fc_abts_s.ox_id = FNIC_RPN_REQ_OXID;
> > +		fc_abts_s.did[2] = 0xFC;
> > +		break;
> > +
> > +	case FDLS_STATE_SCR:
> > +		hton24(fcid, iport->fcid);
> > +		FNIC_SET_S_ID(pfc_abts, fcid);
> > +		fc_abts_s.ox_id = FNIC_SCR_REQ_OXID;
> > +		fc_abts_s.did[2] = 0xFD;
> > +		break;
> > +
> > +	case FDLS_STATE_REGISTER_FC4_TYPES:
> > +		hton24(fcid, iport->fcid);
> > +		FNIC_SET_S_ID(pfc_abts, fcid);
> > +		fc_abts_s.ox_id = FNIC_RFT_REQ_OXID;
> > +		fc_abts_s.did[2] = 0xFC;
> > +		break;
> > +
> > +	case FDLS_STATE_REGISTER_FC4_FEATURES:
> > +		hton24(fcid, iport->fcid);
> > +		FNIC_SET_S_ID(pfc_abts, fcid);
> > +		fc_abts_s.ox_id = FNIC_RFF_REQ_OXID;
> > +		fc_abts_s.did[2] = 0xFC;
> > +		break;
> > +
> > +	case FDLS_STATE_GPN_FT:
> > +		hton24(fcid, iport->fcid);
> > +		FNIC_SET_S_ID(pfc_abts, fcid);
> > +		fc_abts_s.ox_id = FNIC_GPN_FT_OXID;
> > +		fc_abts_s.did[2] = 0xFC;
> > +		break;
> > +	default:
> > +		return;
> > +	}
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "FDLS sending fabric abts. iport->fabric.state: %d",
> > +				 iport->fabric.state);
> > +
> > +	iport->fabric.flags |= FNIC_FDLS_FABRIC_ABORT_ISSUED;
> > +	fnic_send_fcoe_frame(iport, &fc_abts_s, sizeof(struct fc_hdr_s));
> > +	/* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */
> > +
> > +	fdls_start_fabric_timer(iport, 2 * iport->r_a_tov);
> > +	iport->fabric.timer_pending = 1;
> > +}
> > +
> > +static void fdls_send_fabric_flogi(struct fnic_iport_s *iport)
> > +{
> > +	struct fc_els_s flogi;
> > +	struct fnic *fnic = iport->fnic;
> > +
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "0x%x: FDLS send fabric FLOGI", iport->fcid);
> > +
> > +	memcpy(&flogi, &fnic_flogi_req, sizeof(struct fc_els_s));
> > +	FNIC_SET_NPORT_NAME(flogi, iport->wwpn);
> > +	FNIC_SET_NODE_NAME(flogi, iport->wwnn);
> > +	FNIC_SET_RDF_SIZE(flogi.u.csp_flogi, iport->max_payload_size);
> > +	FNIC_SET_R_A_TOV(flogi.u.csp_flogi, iport->r_a_tov);
> > +	FNIC_SET_E_D_TOV(flogi.u.csp_flogi, iport->e_d_tov);
> > +
> > +	fnic_send_fcoe_frame(iport, &flogi, sizeof(struct fc_els_s));
> > +	/* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */
> > +	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
> > +}
> > +
> > +
> Double newline.

Sure. I'll fix this in the next version.

> > +static void fdls_send_fabric_plogi(struct fnic_iport_s *iport)
> > +{
> > +	struct fc_els_s plogi;
> > +	struct fc_hdr_s *fchdr = &plogi.fchdr;
> > +	uint8_t fcid[3];
> > +	struct fnic *fnic = iport->fnic;
> > +
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "0x%x: FDLS send fabric PLOGI", iport->fcid);
> > +
> > +	memcpy(&plogi, &fnic_plogi_req, sizeof(struct fc_els_s));
> > +
> > +	hton24(fcid, iport->fcid);
> > +
> > +	FNIC_SET_S_ID(fchdr, fcid);
> > +	FNIC_SET_NPORT_NAME(plogi, iport->wwpn);
> > +	FNIC_SET_NODE_NAME(plogi, iport->wwnn);
> > +	FNIC_SET_RDF_SIZE(plogi.u.csp_plogi, iport->max_payload_size);
> > +
> > +	fnic_send_fcoe_frame(iport, &plogi, sizeof(struct fc_els_s));
> > +	/* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */
> > +	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
> > +}
> > +
> > +static void fdls_send_rpn_id(struct fnic_iport_s *iport)
> > +{
> > +	struct fc_rpn_id_s rpn_id;
> > +	uint8_t fcid[3];
> > +	struct fnic *fnic = iport->fnic;
> > +
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "0x%x: FDLS send RPN ID", iport->fcid);
> > +
> > +	memcpy(&rpn_id, &fnic_rpn_id_req, sizeof(struct fc_rpn_id_s));
> > +
> > +	hton24(fcid, iport->fcid);
> > +
> > +	FNIC_SET_S_ID((&rpn_id.fchdr), fcid);
> > +	FNIC_SET_RPN_PORT_ID((&rpn_id), fcid);
> > +	FNIC_SET_RPN_PORT_NAME((&rpn_id), iport->wwpn);
> > +
> > +	fnic_send_fcoe_frame(iport, &rpn_id, sizeof(struct fc_rpn_id_s));
> > +	/* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */
> > +	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
> > +}
> > +
> > +static void fdls_send_scr(struct fnic_iport_s *iport)
> > +{
> > +	struct fc_scr_s scr_req;
> > +	uint8_t fcid[3];
> > +	struct fnic *fnic = iport->fnic;
> > +
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "0x%x: FDLS send SCR", iport->fcid);
> > +
> > +	memcpy(&scr_req, &fnic_scr_req, sizeof(struct fc_scr_s));
> > +
> > +	hton24(fcid, iport->fcid);
> > +	FNIC_SET_S_ID((&scr_req.fchdr), fcid);
> > +
> > +	fnic_send_fcoe_frame(iport, &scr_req, sizeof(struct fc_scr_s));
> > +	/* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */
> > +	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
> > +}
> > +
> > +static void fdls_send_gpn_ft(struct fnic_iport_s *iport, int fdls_state)
> > +{
> > +	struct fc_gpn_ft_s gpn_ft;
> > +	uint8_t fcid[3];
> > +	struct fnic *fnic = iport->fnic;
> > +
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "0x%x: FDLS send GPN FT", iport->fcid);
> > +
> > +	memcpy(&gpn_ft, &fnic_gpn_ft_req, sizeof(struct fc_gpn_ft_s));
> > +
> > +	hton24(fcid, iport->fcid);
> > +	FNIC_SET_S_ID((&gpn_ft.fchdr), fcid);
> > +	fnic_send_fcoe_frame(iport, &gpn_ft, sizeof(struct fc_gpn_ft_s));
> > +	/* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */
> > +	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
> > +	fdls_set_state((&iport->fabric), fdls_state);
> > +}
> > +
> > +static void fdls_send_register_fc4_types(struct fnic_iport_s *iport)
> > +{
> > +	struct fc_rft_id rft_id;
> > +	uint8_t fcid[3];
> > +	struct fnic *fnic = iport->fnic;
> > +
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "0x%x: FDLS sending FC4 Types", iport->fcid);
> > +
> > +	memset(&rft_id, 0, sizeof(struct fc_rft_id));
> > +	memcpy(&rft_id, &fnic_rft_id_req, sizeof(struct fc_rft_id));
> > +	hton24(fcid, iport->fcid);
> > +
> > +	FNIC_SET_S_ID((&rft_id.fchdr), fcid);
> > +	FNIC_SET_PORT_ID((&rft_id), fcid);
> > +	if (IS_FNIC_FCP_INITIATOR(fnic))
> > +		rft_id.fc4_types[2] = 1;
> > +
> > +	rft_id.fc4_types[7] = 1;
> > +	fnic_send_fcoe_frame(iport, &rft_id, sizeof(struct fc_rft_id));
> > +	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
> > +}
> > +
> > +static void fdls_send_register_fc4_features(struct fnic_iport_s *iport)
> > +{
> > +	struct fc_rff_id rff_id;
> > +	uint8_t fcid[3];
> > +	struct fnic *fnic = iport->fnic;
> > +
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "0x%x: FDLS sending FC4 features", iport->fcid);
> > +	memcpy(&rff_id, &fnic_rff_id_req, sizeof(struct fc_rff_id));
> > +
> > +	hton24(fcid, iport->fcid);
> > +
> > +	FNIC_SET_S_ID((&rff_id.fchdr), fcid);
> > +	FNIC_SET_PORT_ID((&rff_id), fcid);
> > +
> > +	if (IS_FNIC_FCP_INITIATOR(fnic)) {
> > +		rff_id.fc4_type = 0x08;
> > +	} else {
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "0x%x: Unknown type", iport->fcid);
> > +	}
> > +
> > +	fnic_send_fcoe_frame(iport, &rff_id, sizeof(struct fc_rff_id));
> > +	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
> > +}
> > +
> > +/***********************************************************************
> > + * fdls_send_fabric_logo
> > + *
> > + * \brief Send flogo to the fcf
> > + *
> > + * \param[in]  iport   Handle to fnic iport.
> > + *
> > + * \param[in]  start_timer  1 if we want to start a perodic timer else 0
> > + *
> > + * \retval void
> > + *
> > + * \locks Currently this assumes to be called with fnic lock held
> > + *
> > + * \note This function does not change or check the fabric state.
> > + *       It the caller responsibility to set the appropriate iport fabric
> > + *       state when this is called. Normall its FDLS_STATE_FABRIC_LOGO.
> > + *       fdls_set_state((&iport->fabric), FDLS_STATE_FABRIC_LOGO)
> > + * \note Locking can be changed and made bit granuler in future
> > + *
> > + ***********************************************************************/
> Please use the correct kernel-doc format.

Sure. I'll fix this in the next version.

> > +void fdls_send_fabric_logo(struct fnic_iport_s *iport)
> > +{
> > +	struct fc_logo_req_s logo;
> > +	uint8_t s_id[3];
> > +	uint8_t d_id[3] = { 0xFF, 0xFF, 0xFE };
> > +	struct fnic *fnic = iport->fnic;
> > +
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "Sending logo to fabric from iport->fcid: 0x%x",
> > +				 iport->fcid);
> > +	memcpy(&logo, &fnic_logo_req, sizeof(struct fc_logo_req_s));
> > +
> > +	hton24(s_id, iport->fcid);
> > +
> > +	FNIC_SET_S_ID((&logo.fchdr), s_id);
> > +	FNIC_SET_D_ID((&logo.fchdr), d_id);
> > +	FNIC_SET_OX_ID((&logo.fchdr), FNIC_FLOGO_REQ_OXID);
> > +
> > +	memcpy(&logo.fcid, s_id, 3);
> > +	logo.wwpn = htonll(iport->wwpn);
> > +
> > +	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
> > +
> > +	iport->fabric.flags &= ~FNIC_FDLS_FABRIC_ABORT_ISSUED;
> > +	fnic_send_fcoe_frame(iport, &logo, sizeof(struct fc_logo_req_s));
> > +}
> > +
> > +void fdls_fabric_timer_callback(struct timer_list *t)
> > +{
> > +	struct fnic_fdls_fabric_s *fabric = from_timer(fabric, t, retry_timer);
> > +	struct fnic_iport_s *iport =
> > +		container_of(fabric, struct fnic_iport_s, fabric);
> > +	struct fnic *fnic = iport->fnic;
> > +	unsigned long flags;
> > +
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +		 "tp: %d fab state: %d fab retry counter: %d max_flogi_retries: %d",
> > +		 iport->fabric.timer_pending, iport->fabric.state,
> > +		 iport->fabric.retry_counter, iport->max_flogi_retries);
> > +
> > +	spin_lock_irqsave(&fnic->fnic_lock, flags);
> > +
> > +	if (!iport->fabric.timer_pending) {
> > +		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > +		return;
> > +	}
> > +
> > +	if (iport->fabric.del_timer_inprogress) {
> > +		iport->fabric.del_timer_inprogress = 0;
> > +		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "fabric_del_timer inprogress(%d). Skip timer cb",
> > +					 iport->fabric.del_timer_inprogress);
> > +		return;
> > +	}
> > +
> > +	iport->fabric.timer_pending = 0;
> > +
> > +	/* The fabric state indicates which frames have time out, and we retry */
> > +	switch (iport->fabric.state) {
> > +	case FDLS_STATE_FABRIC_FLOGI:
> > +		/* Flogi received a LS_RJT with busy we retry from here */
> > +		if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME)
> > +			&& (iport->fabric.retry_counter < iport->max_flogi_retries)) {
> > +			iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME;
> > +			fdls_send_fabric_flogi(iport);
> > +			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > +			return;
> > +		}
> > +		/* Flogi has time out 2*ed_tov send abts */
> > +		if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) {
> > +			fdls_send_fabric_abts(iport);
> > +		} else {
> > +			/* Flogi ABTS has timed out and we have waited
> > +			 * (2 * ra_tov), we can retry safely with same
> > +			 * exchange id
> > +			 */
> > +			if (iport->fabric.retry_counter < iport->max_flogi_retries) {
> > +				iport->fabric.flags &= ~FNIC_FDLS_FABRIC_ABORT_ISSUED;
> > +				fdls_send_fabric_flogi(iport);
> > +			} else
> > +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +							 "Exceeded max FLOGI retries");
> > +		}
> > +		break;
> > +	case FDLS_STATE_FABRIC_PLOGI:
> > +		/* Plogi received a LS_RJT with busy we retry from here */
> > +		if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME)
> > +			&& (iport->fabric.retry_counter < iport->max_plogi_retries)) {
> > +			iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME;
> > +			fdls_send_fabric_plogi(iport);
> > +			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > +			return;
> > +		}
> > +		/* Plogi has timed out 2*ed_tov send abts */
> > +		if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) {
> > +			fdls_send_fabric_abts(iport);
> > +		} else {
> > +			/* plogi ABTS has timed out and we have waited
> > +			 * (2 * ra_tov) can retry safely with same
> > +			 * exchange id
> > +			 */
> > +			if (iport->fabric.retry_counter < iport->max_plogi_retries) {
> > +				iport->fabric.flags &= ~FNIC_FDLS_FABRIC_ABORT_ISSUED;
> > +				fdls_send_fabric_plogi(iport);
> > +			} else
> > +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +							 "Exceeded max PLOGI retries");
> > +		}
> > +		break;
> > +	case FDLS_STATE_RPN_ID:
> > +		/* Rpn_id received a LS_RJT with busy we retry from here */
> > +		if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME)
> > +			&& (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) {
> > +			iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME;
> > +			fdls_send_rpn_id(iport);
> > +			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > +			return;
> > +		}
> > +		/* RPN have timed out send abts */
> > +		if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED))
> > +			fdls_send_fabric_abts(iport);
> > +		else
> > +			/* ABTS has timed out (2*ra_tov) */
> > +			fnic_fdls_start_plogi(iport);	/* go back to fabric Plogi */
> > +		break;
> > +	case FDLS_STATE_SCR:
> > +		/* scr received a LS_RJT with busy we retry from here */
> > +		if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME)
> > +			&& (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) {
> > +			iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME;
> > +			fdls_send_scr(iport);
> > +			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > +			return;
> > +		}
> > +		/* scr have timed out send abts */
> > +		if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED))
> > +			fdls_send_fabric_abts(iport);
> > +		else {
> > +			/* ABTS has timed out (2*ra_tov), we give up */
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +						 "ABTS timed out. Starting PLOGI: %p", iport);
> > +			fnic_fdls_start_plogi(iport);
> > +		}
> > +		break;
> > +	case FDLS_STATE_REGISTER_FC4_TYPES:
> > +		/* scr received a LS_RJT with busy we retry from here */
> > +		if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME)
> > +			&& (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) {
> > +			iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME;
> > +			fdls_send_register_fc4_types(iport);
> > +			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > +			return;
> > +		}
> > +		/* RFT_ID timed out send abts */
> > +		if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) {
> > +			fdls_send_fabric_abts(iport);
> > +		} else {
> > +			/* ABTS has timed out (2*ra_tov), we give up */
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +						 "ABTS timed out. Starting PLOGI: %p", iport);
> > +			fnic_fdls_start_plogi(iport);	/* go back to fabric Plogi */
> > +		}
> > +		break;
> > +	case FDLS_STATE_REGISTER_FC4_FEATURES:
> > +		/* scr received a LS_RJT with busy we retry from here */
> > +		if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME)
> > +			&& (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) {
> > +			iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME;
> > +			fdls_send_register_fc4_features(iport);
> > +			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > +			return;
> > +		}
> > +		/* scr have timed out send abts */
> > +		if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED))
> > +			fdls_send_fabric_abts(iport);
> > +		else {
> > +			/* ABTS has timed out (2*ra_tov), we give up */
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +						 "ABTS timed out. Starting PLOGI %p", iport);
> > +			fnic_fdls_start_plogi(iport);	/* go back to fabric Plogi */
> > +		}
> > +		break;
> > +	case FDLS_STATE_RSCN_GPN_FT:
> > +	case FDLS_STATE_SEND_GPNFT:
> > +	case FDLS_STATE_GPN_FT:
> > +		/* GPN_FT received a LS_RJT with busy we retry from here */
> > +		if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME)
> > +			&& (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) {
> > +			iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME;
> > +			fdls_send_gpn_ft(iport, iport->fabric.state);
> > +			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > +			return;
> > +		}
> > +		/* gpn_gt have timed out send abts */
> > +		if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) {
> > +			fdls_send_fabric_abts(iport);
> > +		} else {
> > +			/*
> > +			 * ABTS has timed out have waited (2*ra_tov) can
> > +			 * retry safely with same exchange id
> > +			 */
> > +			if (iport->fabric.retry_counter < FDLS_RETRY_COUNT) {
> > +				fdls_send_gpn_ft(iport, iport->fabric.state);
> > +			} else {
> > +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "ABTS timeout for fabric GPN_FT. Check name server: %p",
> > +					 iport);
> > +			}
> > +		}
> > +		break;
> > +	default:
> > +		break;
> > +	}
> > +	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > +}
> > +
> > +static void fnic_fdls_start_flogi(struct fnic_iport_s *iport)
> > +{
> > +	iport->fabric.retry_counter = 0;
> > +	fdls_send_fabric_flogi(iport);
> > +	fdls_set_state((&iport->fabric), FDLS_STATE_FABRIC_FLOGI);
> > +	iport->fabric.flags = 0;
> > +}
> > +
> > +static void fnic_fdls_start_plogi(struct fnic_iport_s *iport)
> > +{
> > +	iport->fabric.retry_counter = 0;
> > +	fdls_send_fabric_plogi(iport);
> > +	fdls_set_state((&iport->fabric), FDLS_STATE_FABRIC_PLOGI);
> > +	iport->fabric.flags &= ~FNIC_FDLS_FABRIC_ABORT_ISSUED;
> > +}
> > +
> > +static void
> > +fdls_process_rff_id_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr)
> > +{
> > +	struct fnic *fnic = iport->fnic;
> > +	struct fnic_fdls_fabric_s *fdls = &iport->fabric;
> > +	struct fc_rff_id *rff_rsp = (struct fc_rff_id *) fchdr;
> > +	uint16_t rsp;
> > +	uint8_t reason_code;
> > +
> > +	if (fdls_get_state(fdls) != FDLS_STATE_REGISTER_FC4_FEATURES) {
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "RFF_ID resp recvd in state(%d). Dropping.",
> > +					 fdls_get_state(fdls));
> > +		return;
> > +	}
> > +
> > +	rsp = FNIC_GET_FC_CT_CMD((&rff_rsp->fc_ct_hdr));
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "0x%x: FDLS process RFF ID response: 0x%04x", iport->fcid,
> > +				 (uint32_t) rsp);
> > +
> > +	switch (rsp) {
> > +	case FC_CT_ACC:
> > +		if (iport->fabric.timer_pending) {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +						 "Canceling fabric disc timer %p\n", iport);
> > +			fnic_del_fabric_timer_sync();
> > +		}
> > +		iport->fabric.timer_pending = 0;
> > +		fdls->retry_counter = 0;
> > +		fdls_set_state((&iport->fabric), FDLS_STATE_SCR);
> > +		fdls_send_scr(iport);
> > +		break;
> > +	case FC_CT_REJ:
> > +		reason_code = rff_rsp->fc_ct_hdr.reason_code;
> > +		if (((reason_code == FC_CT_RJT_LOGICAL_BUSY)
> > +			 || (reason_code == FC_CT_RJT_BUSY))
> > +			&& (fdls->retry_counter < FDLS_RETRY_COUNT)) {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "RFF_ID ret FC_LS_REJ BUSY. Retry from timer routine %p",
> > +					 iport);
> > +
> > +			/* Retry again from the timer routine */
> > +			fdls->flags |= FNIC_FDLS_RETRY_FRAME;
> > +		} else {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "RFF_ID returned FC_LS_REJ. Halting discovery %p", iport);
> > +			if (iport->fabric.timer_pending) {
> > +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +							 "Canceling fabric disc timer %p\n", iport);
> > +				fnic_del_fabric_timer_sync();
> > +			}
> > +			fdls->timer_pending = 0;
> > +			fdls->retry_counter = 0;
> > +		}
> > +		break;
> > +	default:
> > +		break;
> > +	}
> > +}
> > +
> > +static void
> > +fdls_process_rft_id_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr)
> > +{
> > +	struct fnic_fdls_fabric_s *fdls = &iport->fabric;
> > +	struct fc_rft_id *rft_rsp = (struct fc_rft_id *) fchdr;
> > +	uint16_t rsp;
> > +	uint8_t reason_code;
> > +	struct fnic *fnic = iport->fnic;
> > +
> > +	if (fdls_get_state(fdls) != FDLS_STATE_REGISTER_FC4_TYPES) {
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "RFT_ID resp recvd in state(%d). Dropping.",
> > +					 fdls_get_state(fdls));
> > +		return;
> > +	}
> > +
> > +	rsp = FNIC_GET_FC_CT_CMD((&rft_rsp->fc_ct_hdr));
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "0x%x: FDLS process RFT ID response: 0x%04x", iport->fcid,
> > +				 (uint32_t) rsp);
> > +
> > +	switch (rsp) {
> > +	case FC_CT_ACC:
> > +		if (iport->fabric.timer_pending) {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +						 "Canceling fabric disc timer %p\n", iport);
> > +			fnic_del_fabric_timer_sync();
> > +		}
> > +		iport->fabric.timer_pending = 0;
> > +		fdls->retry_counter = 0;
> > +		fdls_send_register_fc4_features(iport);
> > +		fdls_set_state((&iport->fabric), FDLS_STATE_REGISTER_FC4_FEATURES);
> > +		break;
> > +	case FC_CT_REJ:
> > +		reason_code = rft_rsp->fc_ct_hdr.reason_code;
> > +		if (((reason_code == FC_CT_RJT_LOGICAL_BUSY)
> > +			 || (reason_code == FC_CT_RJT_BUSY))
> > +			&& (fdls->retry_counter < FDLS_RETRY_COUNT)) {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "0x%x: RFT_ID ret FC_LS_REJ BUSY. Retry from timer routine",
> > +				 iport->fcid);
> > +
> > +			/* Retry again from the timer routine */
> > +			fdls->flags |= FNIC_FDLS_RETRY_FRAME;
> > +		} else {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "0x%x: RFT_ID REJ. Halting discovery reason %d expl %d",
> > +				 iport->fcid, reason_code,
> > +				 rft_rsp->fc_ct_hdr.reason_expl);
> > +			if (iport->fabric.timer_pending) {
> > +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +							 "Canceling fabric disc timer %p\n", iport);
> > +				fnic_del_fabric_timer_sync();
> > +			}
> > +			fdls->timer_pending = 0;
> > +			fdls->retry_counter = 0;
> > +		}
> > +		break;
> > +	default:
> > +		break;
> > +	}
> > +}
> > +
> > +static void
> > +fdls_process_rpn_id_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr)
> > +{
> > +	struct fnic_fdls_fabric_s *fdls = &iport->fabric;
> > +	struct fc_rpn_id_s *rpn_rsp = (struct fc_rpn_id_s *) fchdr;
> > +	uint16_t rsp;
> > +	uint8_t reason_code;
> > +	struct fnic *fnic = iport->fnic;
> > +
> > +	if (fdls_get_state(fdls) != FDLS_STATE_RPN_ID) {
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "RPN_ID resp recvd in state(%d). Dropping.",
> > +					 fdls_get_state(fdls));
> > +		return;
> > +	}
> > +
> > +	rsp = FNIC_GET_FC_CT_CMD((&rpn_rsp->fc_ct_hdr));
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "0x%x: FDLS process RPN ID response: 0x%04x", iport->fcid,
> > +				 (uint32_t) rsp);
> > +
> > +	switch (rsp) {
> > +	case FC_CT_ACC:
> > +		if (iport->fabric.timer_pending) {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +						 "Canceling fabric disc timer %p\n", iport);
> > +			fnic_del_fabric_timer_sync();
> > +		}
> > +		iport->fabric.timer_pending = 0;
> > +		fdls->retry_counter = 0;
> > +		fdls_send_register_fc4_types(iport);
> > +		fdls_set_state((&iport->fabric), FDLS_STATE_REGISTER_FC4_TYPES);
> > +		break;
> > +	case FC_CT_REJ:
> > +		reason_code = rpn_rsp->fc_ct_hdr.reason_code;
> > +		if (((reason_code == FC_CT_RJT_LOGICAL_BUSY)
> > +			 || (reason_code == FC_CT_RJT_BUSY))
> > +			&& (fdls->retry_counter < FDLS_RETRY_COUNT)) {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "RPN_ID returned REJ BUSY. Retry from timer routine %p",
> > +					 iport);
> > +
> > +			/* Retry again from the timer routine */
> > +			fdls->flags |= FNIC_FDLS_RETRY_FRAME;
> > +		} else {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +						 "RPN_ID FC_LS_REJ. Halting discovery %p", iport);
> > +			if (iport->fabric.timer_pending) {
> > +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +							 "Canceling fabric disc timer %p\n", iport);
> > +				fnic_del_fabric_timer_sync();
> > +			}
> > +			fdls->timer_pending = 0;
> > +			fdls->retry_counter = 0;
> > +		}
> > +		break;
> > +	default:
> > +		break;
> > +	}
> > +}
> > +
> > +static void
> > +fdls_process_scr_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr)
> > +{
> > +	struct fnic_fdls_fabric_s *fdls = &iport->fabric;
> > +	struct fc_scr_s *scr_rsp = (struct fc_scr_s *) fchdr;
> > +	struct fc_els_reject_s *els_rjt = (struct fc_els_reject_s *) fchdr;
> > +	struct fnic *fnic = iport->fnic;
> > +
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "FDLS process SCR response: 0x%04x",
> > +				 (uint32_t) scr_rsp->command);
> > +
> > +	if (fdls_get_state(fdls) != FDLS_STATE_SCR) {
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "SCR resp recvd in state(%d). Dropping.",
> > +					 fdls_get_state(fdls));
> > +		return;
> > +	}
> > +
> > +	switch (scr_rsp->command) {
> > +	case FC_LS_ACC:
> > +		if (iport->fabric.timer_pending) {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +						 "Canceling fabric disc timer %p\n", iport);
> > +			fnic_del_fabric_timer_sync();
> > +		}
> > +		iport->fabric.timer_pending = 0;
> > +		iport->fabric.retry_counter = 0;
> > +		fdls_send_gpn_ft(iport, FDLS_STATE_GPN_FT);
> > +		break;
> > +
> > +	case FC_LS_REJ:
> > +		if (((els_rjt->reason_code == FC_ELS_RJT_LOGICAL_BUSY)
> > +			 || (els_rjt->reason_code == FC_ELS_RJT_BUSY))
> > +			&& (fdls->retry_counter < FDLS_RETRY_COUNT)) {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +						 "SCR FC_LS_REJ BUSY. Retry from timer routine %p",
> > +						 iport);
> > +			/* Retry again from the timer routine */
> > +			fdls->flags |= FNIC_FDLS_RETRY_FRAME;
> > +		} else {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +						 "SCR returned FC_LS_REJ. Halting discovery %p",
> > +						 iport);
> > +			if (iport->fabric.timer_pending) {
> > +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +							 "Canceling fabric disc timer %p\n", iport);
> > +				fnic_del_fabric_timer_sync();
> > +			}
> > +			fdls->timer_pending = 0;
> > +			fdls->retry_counter = 0;
> > +		}
> > +		break;
> > +
> > +	default:
> > +		break;
> > +	}
> > +}
> > +
> > +static void
> > +fdls_process_gpn_ft_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr,
> > +						int len)
> > +{
> > +	struct fnic_fdls_fabric_s *fdls = &iport->fabric;
> > +	struct fc_gpn_ft_s *gpn_ft_rsp = (struct fc_gpn_ft_s *) fchdr;
> > +	uint16_t rsp;
> > +	uint8_t reason_code;
> > +	struct fnic *fnic = iport->fnic;
> > +
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "FDLS process GPN_FT response: iport state: %d len: %d",
> > +				 iport->state, len);
> > +
> > +	/*
> > +	 * GPNFT response :-
> > +	 *  FDLS_STATE_GPN_FT      : GPNFT send after SCR state
> > +	 *  during fabric discovery(FNIC_IPORT_STATE_FABRIC_DISC)
> > +	 *  FDLS_STATE_RSCN_GPN_FT : GPNFT send in response to RSCN
> > +	 *  FDLS_STATE_SEND_GPNFT  : GPNFT send after deleting a Target,
> > +	 *  e.g. after receiving Target LOGO
> > +	 *  FDLS_STATE_TGT_DISCOVERY :Target discovery is currently in progress
> > +	 *  from previous GPNFT response,a new GPNFT response has come.
> > +	 */
> > +	if (!(((iport->state == FNIC_IPORT_STATE_FABRIC_DISC)
> > +		   && (fdls_get_state(fdls) == FDLS_STATE_GPN_FT))
> > +		  || ((iport->state == FNIC_IPORT_STATE_READY)
> > +			  && ((fdls_get_state(fdls) == FDLS_STATE_RSCN_GPN_FT)
> > +				  || (fdls_get_state(fdls) == FDLS_STATE_SEND_GPNFT)
> > +				  || (fdls_get_state(fdls) == FDLS_STATE_TGT_DISCOVERY))))) {
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +			 "GPNFT resp recvd in fab state(%d) iport_state(%d). Dropping.",
> > +			 fdls_get_state(fdls), iport->state);
> > +		return;
> > +	}
> > +
> > +	iport->state = FNIC_IPORT_STATE_READY;
> > +	rsp = FNIC_GET_FC_CT_CMD((&gpn_ft_rsp->fc_ct_hdr));
> > +
> > +	switch (rsp) {
> > +
> > +	case FC_CT_ACC:
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "0x%x: GPNFT_RSP accept", iport->fcid);
> > +		break;
> > +
> > +	case FC_CT_REJ:
> > +		reason_code = gpn_ft_rsp->fc_ct_hdr.reason_code;
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "0x%x: GPNFT_RSP Reject", iport->fcid);
> > +		break;
> > +
> > +	default:
> > +		break;
> > +	}
> > +}
> > +
> > +/***********************************************************************
> > + * fdls_process_fabric_logo_rsp
> > + *
> > + * \brief Handles a flogo response from the fcf
> > + *
> > + * \param[in]  iport   Handle to fnic iport.
> > + *
> > + * \param[in]  fchdr   Incoming frame
> > + *
> > + * \retval void
> > + *
> > + *
> > + ***********************************************************************/
> Again, please use correct kernel-doc format.

Sure. I'll fix this in the next version.

> > +static void
> > +fdls_process_fabric_logo_rsp(struct fnic_iport_s *iport,
> > +							 struct fc_hdr_s *fchdr)
> > +{
> > +	struct fc_els_s *flogo_rsp = (struct fc_els_s *) fchdr;
> > +	struct fnic *fnic = iport->fnic;
> > +
> > +	switch (flogo_rsp->command) {
> > +	case FC_LS_ACC:
> > +		if (iport->fabric.state != FDLS_STATE_FABRIC_LOGO) {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "Flogo response. Fabric not in LOGO state. Dropping! %p",
> > +				 iport);
> > +			return;
> > +		}
> > +
> > +		iport->fabric.state = FDLS_STATE_FLOGO_DONE;
> > +		iport->state = FNIC_IPORT_STATE_LINK_WAIT;
> > +
> > +		if (iport->fabric.timer_pending) {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +						 "lport 0x%p Canceling fabric disc timer\n",
> > +						 iport);
> > +			fnic_del_fabric_timer_sync();
> > +		}
> > +		iport->fabric.timer_pending = 0;
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "Flogo response from Fabric for did: 0x%x",
> > +					 ntoh24(fchdr->did));
> > +		return;
> > +
> > +	case FC_LS_REJ:
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +			 "Flogo response from Fabric for did: 0x%x returned FC_LS_REJ",
> > +			 ntoh24(fchdr->did));
> > +		return;
> > +
> > +	default:
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "FLOGO response not accepted or rejected: 0x%x",
> > +					 flogo_rsp->command);
> > +	}
> > +}
> > +
> > +static void
> > +fdls_process_flogi_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr,
> > +					   void *rx_frame)
> > +{
> > +	struct fnic_fdls_fabric_s *fabric = &iport->fabric;
> > +	struct fc_els_s *flogi_rsp = (struct fc_els_s *) fchdr;
> > +	uint8_t *fcid;
> > +	int rdf_size;
> > +	struct fc_els_reject_s *els_rjt;
> > +	uint8_t fcmac[6] = { 0x0E, 0XFC, 0x00, 0x00, 0x00, 0x00 };
> > +	struct fnic *fnic = iport->fnic;
> > +
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "0x%x: FDLS processing FLOGI response", iport->fcid);
> > +
> > +	if (fdls_get_state(fabric) != FDLS_STATE_FABRIC_FLOGI) {
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "FLOGI response received in state (%d). Dropping frame",
> > +					 fdls_get_state(fabric));
> > +		return;
> > +	}
> > +
> > +	switch (flogi_rsp->command) {
> > +	case FC_LS_ACC:
> > +		if (iport->fabric.timer_pending) {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +						 "iport fcid: 0x%x Canceling fabric disc timer\n",
> > +						 iport->fcid);
> > +			fnic_del_fabric_timer_sync();
> > +		}
> > +
> > +		iport->fabric.timer_pending = 0;
> > +		iport->fabric.retry_counter = 0;
> > +		fcid = FNIC_GET_D_ID(fchdr);
> > +		iport->fcid = ntoh24(fcid);
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "0x%x: FLOGI response accepted", iport->fcid);
> > +
> > +		/* Learn the Service Params */
> > +		rdf_size = ntohs(flogi_rsp->u.csp_flogi.b2b_rdf_size);
> > +		if ((rdf_size >= FNIC_MIN_DATA_FIELD_SIZE)
> > +			&& (rdf_size < FNIC_FC_MAX_PAYLOAD_LEN))
> > +			iport->max_payload_size = MIN(rdf_size,
> > +								  iport->max_payload_size);
> > +
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "max_payload_size from fabric: %d set: %d", rdf_size,
> > +					 iport->max_payload_size);
> > +
> > +		iport->r_a_tov = ntohl(flogi_rsp->u.csp_flogi.r_a_tov);
> > +		iport->e_d_tov = ntohl(flogi_rsp->u.csp_flogi.e_d_tov);
> > +
> > +		if (flogi_rsp->u.csp_flogi.features & FNIC_FC_EDTOV_NSEC)
> > +			iport->e_d_tov = iport->e_d_tov / FNIC_NSEC_TO_MSEC;
> > +
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "From fabric: R_A_TOV: %d E_D_TOV: %d",
> > +					 iport->r_a_tov, iport->e_d_tov);
> > +
> > +		if (IS_FNIC_FCP_INITIATOR(fnic)) {
> > +			fc_host_fabric_name(iport->fnic->lport->host) =
> > +				get_unaligned_be64(&flogi_rsp->node_name);
> > +			fc_host_port_id(iport->fnic->lport->host) = iport->fcid;
> > +		}
> > +
> > +		fnic_fdls_learn_fcoe_macs(iport, rx_frame, fcid);
> > +
> > +		memcpy(&fcmac[3], fcid, 3);
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +			 "Adding vNIC device MAC addr: %02x:%02x:%02x:%02x:%02x:%02x",
> > +			 fcmac[0], fcmac[1], fcmac[2], fcmac[3], fcmac[4],
> > +			 fcmac[5]);
> > +		vnic_dev_add_addr(iport->fnic->vdev, fcmac);
> > +
> > +		if (fdls_get_state(fabric) == FDLS_STATE_FABRIC_FLOGI) {
> > +			fnic_fdls_start_plogi(iport);
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +						 "FLOGI response received. Starting PLOGI");
> > +		} else {
> > +			/* From FDLS_STATE_FABRIC_FLOGI state fabric can only go to
> > +			 * FDLS_STATE_LINKDOWN
> > +			 * state, hence we don't have to worry about undoing:
> > +			 * the fnic_fdls_register_portid and vnic_dev_add_addr
> > +			 */
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "FLOGI response received in state (%d). Dropping frame",
> > +				 fdls_get_state(fabric));
> > +		}
> > +		break;
> > +
> > +	case FC_LS_REJ:
> > +		els_rjt = (struct fc_els_reject_s *) fchdr;
> > +		if (fabric->retry_counter < iport->max_flogi_retries) {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "FLOGI returned FC_LS_REJ BUSY. Retry from timer routine %p",
> > +				 iport);
> > +
> > +			/* Retry Flogi again from the timer routine. */
> > +			fabric->flags |= FNIC_FDLS_RETRY_FRAME;
> > +
> > +		} else {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "FLOGI returned FC_LS_REJ. Halting discovery %p", iport);
> > +			if (iport->fabric.timer_pending) {
> > +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +							 "iport 0x%p Canceling fabric disc timer\n",
> > +							 iport);
> > +				fnic_del_fabric_timer_sync();
> > +			}
> > +			fabric->timer_pending = 0;
> > +			fabric->retry_counter = 0;
> > +		}
> > +		break;
> > +
> > +	default:
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "FLOGI response not accepted: 0x%x",
> > +					 flogi_rsp->command);
> > +		break;
> > +	}
> > +}
> > +
> > +static void
> > +fdls_process_fabric_plogi_rsp(struct fnic_iport_s *iport,
> > +							  struct fc_hdr_s *fchdr)
> > +{
> > +	struct fc_els_s *plogi_rsp = (struct fc_els_s *) fchdr;
> > +	struct fc_els_reject_s *els_rjt = (struct fc_els_reject_s *) fchdr;
> > +	struct fnic *fnic = iport->fnic;
> > +
> > +	if (fdls_get_state((&iport->fabric)) != FDLS_STATE_FABRIC_PLOGI) {
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +			 "Fabric PLOGI response received in state (%d). Dropping frame",
> > +			 fdls_get_state(&iport->fabric));
> > +		return;
> > +	}
> > +
> > +	switch (plogi_rsp->command) {
> > +	case FC_LS_ACC:
> > +		if (iport->fabric.timer_pending) {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "iport fcid: 0x%x fabric PLOGI response: Accepted\n",
> > +				 iport->fcid);
> > +			fnic_del_fabric_timer_sync();
> > +		}
> > +		iport->fabric.timer_pending = 0;
> > +		iport->fabric.retry_counter = 0;
> > +		fdls_set_state(&iport->fabric, FDLS_STATE_RPN_ID);
> > +		fdls_send_rpn_id(iport);
> > +		break;
> > +	case FC_LS_REJ:
> > +		if (((els_rjt->reason_code == FC_ELS_RJT_LOGICAL_BUSY)
> > +			 || (els_rjt->reason_code == FC_ELS_RJT_BUSY))
> > +			&& (iport->fabric.retry_counter < iport->max_plogi_retries)) {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "0x%x: Fabric PLOGI FC_LS_REJ BUSY. Retry from timer routine",
> > +				 iport->fcid);
> > +		} else {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "0x%x: Fabric PLOGI FC_LS_REJ. Halting discovery",
> > +				 iport->fcid);
> > +			if (iport->fabric.timer_pending) {
> > +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +							 "iport fcid: 0x%x Canceling fabric disc timer\n",
> > +							 iport->fcid);
> > +				fnic_del_fabric_timer_sync();
> > +			}
> > +			iport->fabric.timer_pending = 0;
> > +			iport->fabric.retry_counter = 0;
> > +			return;
> > +		}
> > +		break;
> > +	default:
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "PLOGI response not accepted: 0x%x",
> > +					 plogi_rsp->command);
> > +		break;
> > +	}
> > +}
> > +
> > +static void
> > +fdls_process_fabric_abts_rsp(struct fnic_iport_s *iport,
> > +							 struct fc_hdr_s *fchdr)
> > +{
> > +	uint32_t s_id;
> > +	struct fc_abts_ba_acc_s *ba_acc = (struct fc_abts_ba_acc_s *) fchdr;
> > +	struct fc_abts_ba_rjt_s *ba_rjt;
> > +	uint32_t fabric_state = iport->fabric.state;
> > +	struct fnic *fnic = iport->fnic;
> > +
> > +	s_id = ntoh24(fchdr->sid);
> > +	ba_rjt = (struct fc_abts_ba_rjt_s *) fchdr;
> > +
> > +	if (!((s_id == FC_DIR_SERVER) || (s_id == FC_DOMAIN_CONTR)
> > +		  || (s_id == FC_FABRIC_CONTROLLER))) {
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +			 "Received abts rsp with invalid SID: 0x%x. Dropping frame",
> > +			 s_id);
> > +		return;
> > +	}
> > +
> > +	if (iport->fabric.timer_pending) {
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "Canceling fabric disc timer %p\n", iport);
> > +		fnic_del_fabric_timer_sync();
> > +	}
> > +	iport->fabric.timer_pending = 0;
> > +	iport->fabric.flags &= ~FNIC_FDLS_FABRIC_ABORT_ISSUED;
> > +
> > +	if (fchdr->r_ctl == FNIC_BA_ACC_RCTL) {
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +			 "Received abts rsp BA_ACC for fabric_state: %d OX_ID: 0x%x",
> > +			 fabric_state, ba_acc->ox_id);
> > +	} else if (fchdr->r_ctl == FNIC_BA_RJT_RCTL) {
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +			 "BA_RJT fs: %d OX_ID: 0x%x rc: 0x%x rce: 0x%x",
> > +			 fabric_state, ba_rjt->fchdr.ox_id,
> > +			 ba_rjt->reason_code, ba_rjt->reason_explanation);
> > +	}
> > +
> > +	/* currently error handling/retry logic is same for ABTS BA_ACC & BA_RJT */
> > +	switch (fabric_state) {
> > +	case FDLS_STATE_FABRIC_FLOGI:
> > +		if (fchdr->ox_id == FNIC_FLOGI_OXID) {
> > +			if (iport->fabric.retry_counter < iport->max_flogi_retries)
> > +				fdls_send_fabric_flogi(iport);
> > +			else
> > +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +						 "Exceeded max FLOGI retries");
> > +		} else {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "Unknown abts rsp OX_ID: 0x%x FABRIC_FLOGI state. Drop frame",
> > +				 fchdr->ox_id);
> > +		}
> > +		break;
> > +	case FDLS_STATE_FABRIC_LOGO:
> > +		if (fchdr->ox_id == FNIC_FLOGO_REQ_OXID) {
> > +			if (!RETRIES_EXHAUSTED(iport))
> > +				fdls_send_fabric_logo(iport);
> > +		} else {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "Unknown abts rsp OX_ID: 0x%x FABRIC_FLOGI state. Drop frame",
> > +				 fchdr->ox_id);
> > +		}
> > +		break;
> > +	case FDLS_STATE_FABRIC_PLOGI:
> > +		if (fchdr->ox_id == FNIC_PLOGI_FABRIC_OXID) {
> > +			if (iport->fabric.retry_counter < iport->max_plogi_retries)
> > +				fdls_send_fabric_plogi(iport);
> > +			else
> > +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "Exceeded max PLOGI retries");
> > +		} else {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "Unknown abts rsp OX_ID: 0x%x FABRIC_PLOGI state. Drop frame",
> > +				 fchdr->ox_id);
> > +		}
> > +		break;
> > +
> > +	case FDLS_STATE_RPN_ID:
> > +		if (fchdr->ox_id == FNIC_RPN_REQ_OXID) {
> > +			if (iport->fabric.retry_counter < FDLS_RETRY_COUNT) {
> > +				fdls_send_rpn_id(iport);
> > +			} else {
> > +				/* go back to fabric Plogi */
> > +				fnic_fdls_start_plogi(iport);
> > +			}
> > +		} else {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "Unknown abts rsp OX_ID: 0x%x RPN_ID state. Drop frame",
> > +				 fchdr->ox_id);
> > +		}
> > +		break;
> > +
> > +	case FDLS_STATE_SCR:
> > +		if (fchdr->ox_id == FNIC_SCR_REQ_OXID) {
> > +			if (iport->fabric.retry_counter <= FDLS_RETRY_COUNT)
> > +				fdls_send_scr(iport);
> > +			else {
> > +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "abts rsp fab SCR after two tries. Start fabric PLOGI %p",
> > +					 iport);
> > +				fnic_fdls_start_plogi(iport);	/* go back to fabric Plogi */
> > +			}
> > +		} else {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "Unknown abts rsp OX_ID: 0x%x SCR state. Drop frame",
> > +				 fchdr->ox_id);
> > +		}
> > +		break;
> > +	case FDLS_STATE_REGISTER_FC4_TYPES:
> > +		if (fchdr->ox_id == FNIC_RFT_REQ_OXID) {
> > +			if (iport->fabric.retry_counter <= FDLS_RETRY_COUNT) {
> > +				fdls_send_register_fc4_types(iport);
> > +			} else {
> > +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "abts rsp fab RFT_ID two tries. Start fabric PLOGI %p",
> > +					 iport);
> > +				fnic_fdls_start_plogi(iport);	/* go back to fabric Plogi */
> > +			}
> > +		} else {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "Unknown abts rsp OX_ID: 0x%x RFT state. Drop frame",
> > +				 fchdr->ox_id);
> > +		}
> > +		break;
> > +	case FDLS_STATE_REGISTER_FC4_FEATURES:
> > +		if (fchdr->ox_id == FNIC_RFF_REQ_OXID) {
> > +			if (iport->fabric.retry_counter <= FDLS_RETRY_COUNT)
> > +				fdls_send_register_fc4_features(iport);
> > +			else {
> > +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "abts rsp fab SCR after two tries. Start fabric PLOGI %p",
> > +					 iport);
> > +				fnic_fdls_start_plogi(iport);	/* go back to fabric Plogi */
> > +			}
> > +		} else {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "Unknown abts rsp OX_ID: 0x%x RFF state. Drop frame",
> > +				 fchdr->ox_id);
> > +		}
> > +		break;
> > +
> > +	case FDLS_STATE_GPN_FT:
> > +		if (fchdr->ox_id == FNIC_GPN_FT_OXID) {
> > +			if (iport->fabric.retry_counter <= FDLS_RETRY_COUNT) {
> > +				fdls_send_gpn_ft(iport, fabric_state);
> > +			} else {
> > +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "abts rsp fab GPN_FT after two tries %p",
> > +					 iport);
> > +			}
> > +		} else {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "Unknown abts rsp OX_ID: 0x%x GPN_FT state. Drop frame",
> > +				 fchdr->ox_id);
> > +		}
> > +		break;
> > +
> > +	default:
> > +		return;
> > +	}
> > +}
> > +
> > +/*
> > + * Performs a validation for all FCOE frames and return the frame type
> > + */
> > +int
> > +fnic_fdls_validate_and_get_frame_type(struct fnic_iport_s *iport,
> > +									  void *rx_frame, int len,
> > +									  int fchdr_offset)
> > +{
> > +	struct fc_hdr_s *fchdr;
> > +	uint8_t type;
> > +	uint8_t *fc_payload;
> > +	uint16_t oxid;
> > +	uint32_t s_id;
> > +	uint32_t d_id;
> > +	struct fnic *fnic = iport->fnic;
> > +	struct fnic_fdls_fabric_s *fabric = &iport->fabric;
> > +
> > +	fchdr = (struct fc_hdr_s *) ((uint8_t *) rx_frame + fchdr_offset);
> > +	oxid = FNIC_GET_OX_ID(fchdr);
> > +	fc_payload = (uint8_t *) fchdr + sizeof(struct fc_hdr_s);
> > +	type = *fc_payload;
> > +	s_id = ntoh24(fchdr->sid);
> > +	d_id = ntoh24(fchdr->did);
> > +
> > +	/* some common validation */
> > +	if (iport->fcid)
> > +		if (fdls_get_state(fabric) > FDLS_STATE_FABRIC_FLOGI) {
> > +			if ((iport->fcid != d_id) || (!FNIC_FC_FRAME_CS_CTL(fchdr))) {
> > +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +							 "invalid frame received. Dropping frame");
> > +				return -1;
> > +			}
> > +		}
> > +
> > +	/*  ABTS response */
> > +	if ((fchdr->r_ctl == FNIC_BA_ACC_RCTL)
> > +		|| (fchdr->r_ctl == FNIC_BA_RJT_RCTL)) {
> > +		if (!(FNIC_FC_FRAME_TYPE_BLS(fchdr))) {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +						 "Received ABTS invalid frame. Dropping frame");
> > +			return -1;
> > +
> > +		}
> > +		return FNIC_BLS_ABTS_RSP;
> > +	}
> > +	if ((fchdr->r_ctl == FC_ABTS_RCTL) && (FNIC_FC_FRAME_TYPE_BLS(fchdr))) {
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "Receiving Abort Request from s_id: 0x%x", s_id);
> > +		return FNIC_BLS_ABTS_REQ;
> > +	}
> > +
> > +	/* unsolicited requests frames */
> > +	if (FNIC_FC_FRAME_UNSOLICITED(fchdr)) {
> > +		switch (type) {
> > +		case FC_ELS_LOGO:
> > +			if ((!FNIC_FC_FRAME_FCTL_FIRST_LAST_SEQINIT(fchdr))
> > +				|| (!FNIC_FC_FRAME_UNSOLICITED(fchdr))
> > +				|| (!FNIC_FC_FRAME_TYPE_ELS(fchdr))) {
> > +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +							 "Received LOGO invalid frame. Dropping frame");
> > +				return -1;
> > +			}
> > +			return FNIC_ELS_LOGO_REQ;
> > +		case FC_ELS_RSCN:
> > +			if ((!FNIC_FC_FRAME_FCTL_FIRST_LAST_SEQINIT(fchdr))
> > +				|| (!FNIC_FC_FRAME_TYPE_ELS(fchdr))
> > +				|| (!FNIC_FC_FRAME_UNSOLICITED(fchdr))) {
> > +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +						 "Received RSCN invalid FCTL. Dropping frame");
> > +				return -1;
> > +			}
> > +			if (s_id != FC_FABRIC_CONTROLLER)
> > +				return FNIC_ELS_RSCN_REQ;
> > +			break;
> > +		case FC_ELS_PLOGI_REQ:
> > +			return FNIC_ELS_PLOGI_REQ;
> > +		case FC_ELS_ECHO_REQ:
> > +			return FNIC_ELS_ECHO_REQ;
> > +		case FNIC_ELS_ADISC_REQ:
> > +			return FNIC_ELS_ADISC;
> > +		case FC_ELS_RLS_REQ:
> > +			return FNIC_ELS_RLS;
> > +		case FC_ELS_RRQ_REQ:
> > +			return FNIC_ELS_RRQ;
> > +		default:
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "Unsupported frame (type:0x%02x) from fcid: 0x%x",
> > +				 type, s_id);
> > +			return FNIC_ELS_UNSUPPORTED_REQ;
> > +		}
> > +	}
> > +
> > +	/*response from fabric */
> > +	switch (oxid) {
> > +
> > +	case FNIC_FLOGO_REQ_OXID:
> > +		return FNIC_FABRIC_LOGO_RSP;
> > +
> > +	case FNIC_FLOGI_OXID:
> > +		if (type == FC_LS_ACC) {
> > +			if ((s_id != FC_DOMAIN_CONTR)
> > +				|| (!FNIC_FC_FRAME_TYPE_ELS(fchdr))) {
> > +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "Received unknown frame. Dropping frame");
> > +				return -1;
> > +			}
> > +		}
> > +		return FNIC_FABRIC_FLOGI_RSP;
> > +
> > +	case FNIC_PLOGI_FABRIC_OXID:
> > +		if (type == FC_LS_ACC) {
> > +			if ((s_id != FC_DIR_SERVER)
> > +				|| (!FNIC_FC_FRAME_TYPE_ELS(fchdr))) {
> > +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "Received unknown frame. Dropping frame");
> > +				return -1;
> > +			}
> > +		}
> > +		return FNIC_FABRIC_PLOGI_RSP;
> > +
> > +	case FNIC_SCR_REQ_OXID:
> > +		if (type == FC_LS_ACC) {
> > +			if ((s_id != FC_FABRIC_CONTROLLER)
> > +				|| (!FNIC_FC_FRAME_TYPE_ELS(fchdr))) {
> > +				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "Received unknown frame. Dropping frame");
> > +				return -1;
> > +			}
> > +		}
> > +		return FNIC_FABRIC_SCR_RSP;
> > +
> > +	case FNIC_RPN_REQ_OXID:
> > +		if ((s_id != FC_DIR_SERVER) || (!FNIC_FC_FRAME_TYPE_FC_GS(fchdr))) {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "Received unknown frame. Dropping frame");
> > +			return -1;
> > +		}
> > +		return FNIC_FABRIC_RPN_RSP;
> > +	case FNIC_RFT_REQ_OXID:
> > +		if ((s_id != FC_DIR_SERVER) || (!FNIC_FC_FRAME_TYPE_FC_GS(fchdr))) {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "Received unknown frame. Dropping frame");
> > +			return -1;
> > +		}
> > +		return FNIC_FABRIC_RFT_RSP;
> > +	case FNIC_RFF_REQ_OXID:
> > +		if ((s_id != FC_DIR_SERVER) || (!FNIC_FC_FRAME_TYPE_FC_GS(fchdr))) {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "Received unknown frame. Dropping frame");
> > +			return -1;
> > +		}
> > +		return FNIC_FABRIC_RFF_RSP;
> > +
> > +	case FNIC_GPN_FT_OXID:
> > +		if ((s_id != FC_DIR_SERVER) || (!FNIC_FC_FRAME_TYPE_FC_GS(fchdr))) {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "Received unknown frame. Dropping frame");
> > +			return -1;
> > +		}
> > +		return FNIC_FABRIC_GPN_FT_RSP;
> > +
> > +	default:
> > +		/* Drop the Rx frame and log/stats it */
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "Solicited response: unknown OXID: 0x%x", oxid);
> > +		return -1;
> > +	}
> > +	return -1;
> > +}
> > +
> > +void fnic_fdls_recv_frame(struct fnic_iport_s *iport, void *rx_frame,
> > +						  int len, int fchdr_offset)
> > +{
> > +	uint16_t oxid;
> > +	struct fc_hdr_s *fchdr;
> > +	uint32_t s_id = 0;
> > +	uint32_t d_id = 0;
> > +	struct fnic *fnic = iport->fnic;
> > +	int frame_type;
> > +
> > +	fchdr = (struct fc_hdr_s *) ((uint8_t *) rx_frame + fchdr_offset);
> > +	s_id = ntoh24(fchdr->sid);
> > +	d_id = ntoh24(fchdr->did);
> > +
> > +	frame_type =
> > +		fnic_fdls_validate_and_get_frame_type(iport, rx_frame, len,
> > +					  fchdr_offset);
> > +
> > +	/*if we are in flogo drop everything else */
> > +	if (iport->fabric.state == FDLS_STATE_FABRIC_LOGO &&
> > +		frame_type != FNIC_FABRIC_LOGO_RSP)
> > +		return;
> > +
> > +	switch (frame_type) {
> > +	case FNIC_FABRIC_FLOGI_RSP:
> > +		fdls_process_flogi_rsp(iport, fchdr, rx_frame);
> > +		break;
> > +	case FNIC_FABRIC_PLOGI_RSP:
> > +		fdls_process_fabric_plogi_rsp(iport, fchdr);
> > +		break;
> > +	case FNIC_FABRIC_RPN_RSP:
> > +		fdls_process_rpn_id_rsp(iport, fchdr);
> > +		break;
> > +	case FNIC_FABRIC_RFT_RSP:
> > +		fdls_process_rft_id_rsp(iport, fchdr);
> > +		break;
> > +	case FNIC_FABRIC_RFF_RSP:
> > +		fdls_process_rff_id_rsp(iport, fchdr);
> > +		break;
> > +	case FNIC_FABRIC_SCR_RSP:
> > +		fdls_process_scr_rsp(iport, fchdr);
> > +		break;
> > +	case FNIC_FABRIC_GPN_FT_RSP:
> > +		fdls_process_gpn_ft_rsp(iport, fchdr, len);
> > +		break;
> > +	case FNIC_FABRIC_LOGO_RSP:
> > +		fdls_process_fabric_logo_rsp(iport, fchdr);
> > +		break;
> > +
> > +	case FNIC_BLS_ABTS_RSP:
> > +		oxid = FNIC_GET_OX_ID(fchdr);
> > +		if ((iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)
> > +			&& (oxid >= FNIC_FLOGI_OXID && oxid <= FNIC_RFF_REQ_OXID)) {
> > +			fdls_process_fabric_abts_rsp(iport, fchdr);
> > +		}
> > +		break;
> > +	default:
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +			 "Received unknown FCoE frame of len: %d. Dropping frame", len);
> > +		break;
> > +	}
> > +}
> > diff --git a/drivers/scsi/fnic/fnic.h b/drivers/scsi/fnic/fnic.h
> > index ce73f08ee889..2d5f438f2cc4 100644
> > --- a/drivers/scsi/fnic/fnic.h
> > +++ b/drivers/scsi/fnic/fnic.h
> > @@ -24,6 +24,7 @@
> >   #include "vnic_intr.h"
> >   #include "vnic_stats.h"
> >   #include "vnic_scsi.h"
> > +#include "fnic_fdls.h"
> >   
> >   #define DRV_NAME		"fnic"
> >   #define DRV_DESCRIPTION		"Cisco FCoE HBA Driver"
> > @@ -31,6 +32,7 @@
> >   #define PFX			DRV_NAME ": "
> >   #define DFX                     DRV_NAME "%d: "
> >   
> > +#define FABRIC_LOGO_MAX_RETRY 3
> >   #define DESC_CLEAN_LOW_WATERMARK 8
> >   #define FNIC_UCSM_DFLT_THROTTLE_CNT_BLD	16 /* UCSM default throttle count */
> >   #define FNIC_MIN_IO_REQ			256 /* Min IO throttle count */
> > @@ -75,6 +77,8 @@
> >   #define FNIC_DEV_RST_TERM_DONE          BIT(20)
> >   #define FNIC_DEV_RST_ABTS_PENDING       BIT(21)
> >   
> > +#define IS_FNIC_FCP_INITIATOR(fnic) (fnic->role == FNIC_ROLE_FCP_INITIATOR)
> > +
> >   /*
> >    * fnic private data per SCSI command.
> >    * These fields are locked by the hashed io_req_lock.
> > @@ -213,12 +217,26 @@ enum fnic_state {
> >   
> >   struct mempool;
> >   
> > +enum fnic_role_e {
> > +	FNIC_ROLE_FCP_INITIATOR = 0,
> > +};
> > +
> >   enum fnic_evt {
> >   	FNIC_EVT_START_VLAN_DISC = 1,
> >   	FNIC_EVT_START_FCF_DISC = 2,
> >   	FNIC_EVT_MAX,
> >   };
> >   
> > +struct fnic_frame_list {
> > +	/*
> > +	 * Link to frame lists
> > +	 */
> > +	struct list_head links;
> > +	void *fp;
> > +	int frame_len;
> > +	int rx_ethhdr_stripped;
> > +};
> > +
> >   struct fnic_event {
> >   	struct list_head list;
> >   	struct fnic *fnic;
> > @@ -235,6 +253,8 @@ struct fnic_cpy_wq {
> >   /* Per-instance private data structure */
> >   struct fnic {
> >   	int fnic_num;
> > +	enum fnic_role_e role;
> > +	struct fnic_iport_s iport;
> >   	struct fc_lport *lport;
> >   	struct fcoe_ctlr ctlr;		/* FIP FCoE controller structure */
> >   	struct vnic_dev_bar bar0;
> > @@ -278,6 +298,7 @@ struct fnic {
> >   	unsigned long state_flags;	/* protected by host lock */
> >   	enum fnic_state state;
> >   	spinlock_t fnic_lock;
> > +	unsigned long lock_flags;
> >   
> >   	u16 vlan_id;	                /* VLAN tag including priority */
> >   	u8 data_src_addr[ETH_ALEN];
> > @@ -307,7 +328,7 @@ struct fnic {
> >   	struct work_struct frame_work;
> >   	struct work_struct flush_work;
> >   	struct sk_buff_head frame_queue;
> > -	struct sk_buff_head tx_queue;
> > +	struct list_head tx_queue;
> >   
> >   	/*** FIP related data members  -- start ***/
> >   	void (*set_vlan)(struct fnic *, u16 vlan);
> > @@ -397,7 +418,6 @@ void fnic_handle_fip_frame(struct work_struct *work);
> >   void fnic_handle_fip_event(struct fnic *fnic);
> >   void fnic_fcoe_reset_vlans(struct fnic *fnic);
> >   void fnic_fcoe_evlist_free(struct fnic *fnic);
> > -extern void fnic_handle_fip_timer(struct fnic *fnic);
> >   
> >   static inline int
> >   fnic_chk_state_flags_locked(struct fnic *fnic, unsigned long st_flags)
> > @@ -406,4 +426,6 @@ fnic_chk_state_flags_locked(struct fnic *fnic, unsigned long st_flags)
> >   }
> >   void __fnic_set_state_flags(struct fnic *, unsigned long, unsigned long);
> >   void fnic_dump_fchost_stats(struct Scsi_Host *, struct fc_host_statistics *);
> > +void fnic_free_txq(struct list_head *head);
> > +
> >   #endif /* _FNIC_H_ */
> > diff --git a/drivers/scsi/fnic/fnic_fcs.c b/drivers/scsi/fnic/fnic_fcs.c
> > index a08293b2ad9f..90d0c4c8920c 100644
> > --- a/drivers/scsi/fnic/fnic_fcs.c
> > +++ b/drivers/scsi/fnic/fnic_fcs.c
> > @@ -20,6 +20,8 @@
> >   #include "fnic_io.h"
> >   #include "fnic.h"
> >   #include "fnic_fip.h"
> > +#include "fnic_fdls.h"
> > +#include "fdls_fc.h"
> >   #include "cq_enet_desc.h"
> >   #include "cq_exch_desc.h"
> >   
> > @@ -28,12 +30,90 @@ struct workqueue_struct *fnic_fip_queue;
> >   struct workqueue_struct *fnic_event_queue;
> >   
> >   static void fnic_set_eth_mode(struct fnic *);
> > -static void fnic_fcoe_send_vlan_req(struct fnic *fnic);
> >   static void fnic_fcoe_start_fcf_disc(struct fnic *fnic);
> >   static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *);
> >   static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag);
> >   static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb);
> >   
> > +/* Frame initialization */
> > +/*
> > + * Variables:
> > + * dst_mac, src_mac
> > + */
> > +struct fnic_eth_hdr_s fnic_eth_hdr_fcoe = {
> > +	.ether_type = 0x0689
> > +};
> > +
> > +/*
> > + * Variables:
> > + * None
> > + */
> > +struct fnic_fcoe_hdr_s fnic_fcoe_hdr = {
> > +	.sof = 0x2E
> > +};
> > +
> > +uint8_t FCOE_ALL_FCF_MAC[6] = { 0x0e, 0xfc, 0x00, 0xff, 0xff, 0xfe };
> > +
> > +/*
> > + * Internal Functions
> > + * This function will initialize the src_mac address to be
> > + * used in outgoing frames
> > + */
> > +static inline void fnic_fdls_set_fcoe_srcmac(struct fnic *fnic,
> > +							 uint8_t *src_mac)
> > +{
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "Setting src mac: %02x:%02x:%02x:%02x:%02x:%02x",
> > +				 src_mac[0], src_mac[1], src_mac[2], src_mac[3],
> > +				 src_mac[4], src_mac[5]);
> > +
> > +	memcpy(fnic->iport.fpma, src_mac, 6);
> > +}
> > +
> > +/*
> > + * This function will initialize the dst_mac address to be
> > + * used in outgoing frames
> > + */
> > +static inline  void fnic_fdls_set_fcoe_dstmac(struct fnic *fnic,
> > +							 uint8_t *dst_mac)
> > +{
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "Setting dst mac: %02x:%02x:%02x:%02x:%02x:%02x",
> > +				 dst_mac[0], dst_mac[1], dst_mac[2], dst_mac[3],
> > +				 dst_mac[4], dst_mac[5]);
> > +
> > +	memcpy(fnic->iport.fcfmac, dst_mac, 6);
> > +}
> > +
> > +/*
> > + * FPMA can be either taken from ethhdr(dst_mac) or flogi resp
> > + * or derive from FC_MAP and FCID combination. While it should be
> > + * same, revisit this if there is any possibility of not-correct.
> > + */
> > +void fnic_fdls_learn_fcoe_macs(struct fnic_iport_s *iport, void *rx_frame,
> > +							   uint8_t *fcid)
> > +{
> > +	struct fnic *fnic = iport->fnic;
> > +	struct fnic_eth_hdr_s *ethhdr = (struct fnic_eth_hdr_s *) rx_frame;
> > +	uint8_t fcmac[6] = { 0x0E, 0xFC, 0x00, 0x00, 0x00, 0x00 };
> > +
> > +	memcpy(&fcmac[3], fcid, 3);
> > +
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "learn fcoe: dst_mac: %02x:%02x:%02x:%02x:%02x:%02x",
> > +				 ethhdr->dst_mac[0], ethhdr->dst_mac[1],
> > +				 ethhdr->dst_mac[2], ethhdr->dst_mac[3],
> > +				 ethhdr->dst_mac[4], ethhdr->dst_mac[5]);
> > +
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "learn fcoe: fc_mac: %02x:%02x:%02x:%02x:%02x:%02x",
> > +				 fcmac[0], fcmac[1], fcmac[2], fcmac[3], fcmac[4],
> > +				 fcmac[5]);
> > +
> > +	fnic_fdls_set_fcoe_srcmac(fnic, fcmac);
> > +	fnic_fdls_set_fcoe_dstmac(fnic, ethhdr->src_mac);
> > +}
> > +
> >   void fnic_handle_link(struct work_struct *work)
> >   {
> >   	struct fnic *fnic = container_of(work, struct fnic, link_work);
> > @@ -363,7 +443,7 @@ static inline int is_fnic_fip_flogi_reject(struct fcoe_ctlr *fip,
> >   	return 0;
> >   }
> >   
> > -static void fnic_fcoe_send_vlan_req(struct fnic *fnic)
> > +void fnic_fcoe_send_vlan_req(struct fnic *fnic)
> >   {
> >   	struct fcoe_ctlr *fip = &fnic->ctlr;
> >   	struct fnic_stats *fnic_stats = &fnic->fnic_stats;
> > @@ -1068,116 +1148,125 @@ void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
> >   /*
> >    * Send FC frame.
> >    */
> > -static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp)
> > +static int fnic_send_frame(struct fnic *fnic, void *frame, int frame_len)
> >   {
> >   	struct vnic_wq *wq = &fnic->wq[0];
> > -	struct sk_buff *skb;
> >   	dma_addr_t pa;
> > -	struct ethhdr *eth_hdr;
> > -	struct vlan_ethhdr *vlan_hdr;
> > -	struct fcoe_hdr *fcoe_hdr;
> > -	struct fc_frame_header *fh;
> > -	u32 tot_len, eth_hdr_len;
> >   	int ret = 0;
> >   	unsigned long flags;
> >   
> > -	fh = fc_frame_header_get(fp);
> > -	skb = fp_skb(fp);
> > +	pa = dma_map_single(&fnic->pdev->dev, frame, frame_len, DMA_TO_DEVICE);
> >   
> > -	if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
> > -	    fcoe_ctlr_els_send(&fnic->ctlr, fnic->lport, skb))
> > -		return 0;
> > +	if ((fnic_fc_trace_set_data(fnic->fnic_num,
> > +								FNIC_FC_SEND | 0x80, (char *) frame,
> > +								frame_len)) != 0) {
> 
> Indentation running amok...

Sure. I'll fix this in the next version.

> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "fnic ctlr frame trace error");
> > +	}
> >   
> > -	if (!fnic->vlan_hw_insert) {
> > -		eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr);
> > -		vlan_hdr = skb_push(skb, eth_hdr_len);
> > -		eth_hdr = (struct ethhdr *)vlan_hdr;
> > -		vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
> > -		vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE);
> > -		vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
> > -		fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1);
> > -	} else {
> > -		eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr);
> > -		eth_hdr = skb_push(skb, eth_hdr_len);
> > -		eth_hdr->h_proto = htons(ETH_P_FCOE);
> > -		fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1);
> > +	spin_lock_irqsave(&fnic->wq_lock[0], flags);
> > +
> > +	if (!vnic_wq_desc_avail(wq)) {
> > +		dma_unmap_single(&fnic->pdev->dev, pa, frame_len, DMA_TO_DEVICE);
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "vnic work queue descriptor is not available");
> > +		ret = -1;
> > +		goto fnic_send_frame_end;
> >   	}
> >   
> > -	if (fnic->ctlr.map_dest)
> > -		fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
> > -	else
> > -		memcpy(eth_hdr->h_dest, fnic->ctlr.dest_addr, ETH_ALEN);
> > -	memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN);
> > +	/* hw inserts cos value */
> > +	fnic_queue_wq_desc(wq, frame, pa, frame_len, FNIC_FCOE_EOF,
> > +					   0, fnic->vlan_id, 1, 1, 1);
> >   
> > -	tot_len = skb->len;
> > -	BUG_ON(tot_len % 4);
> > +fnic_send_frame_end:
> > +	spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
> > +	return ret;
> > +}
> >   
> > -	memset(fcoe_hdr, 0, sizeof(*fcoe_hdr));
> > -	fcoe_hdr->fcoe_sof = fr_sof(fp);
> > -	if (FC_FCOE_VER)
> > -		FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER);
> > +static int
> > +fdls_send_fcoe_frame(struct fnic *fnic, void *payload, int payload_sz,
> > +					 uint8_t *srcmac, uint8_t *dstmac)
> > +{
> > +	uint8_t *frame;
> > +	struct fnic_eth_hdr_s *ethhdr;
> > +	struct fnic_frame_list *frame_elem;
> > +	int max_framesz = FNIC_FCOE_FRAME_MAXSZ;
> > +	int len = 0;
> > +	int ret;
> >   
> > -	pa = dma_map_single(&fnic->pdev->dev, eth_hdr, tot_len, DMA_TO_DEVICE);
> > -	if (dma_mapping_error(&fnic->pdev->dev, pa)) {
> > -		ret = -ENOMEM;
> > -		printk(KERN_ERR "DMA map failed with error %d\n", ret);
> > -		goto free_skb_on_err;
> > +	frame = kmalloc(max_framesz, GFP_ATOMIC);
> > +	if (!frame) {
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "Failed to allocate frame for flogi\n");
> > +		return -ENOMEM;
> >   	}
> > +	memset(frame, 0, max_framesz);
> > +	ethhdr = (struct fnic_eth_hdr_s *) frame;
> >   
> > -	if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_SEND,
> > -				(char *)eth_hdr, tot_len)) != 0) {
> > -		printk(KERN_ERR "fnic ctlr frame trace error!!!");
> > -	}
> > +	memcpy(frame, (uint8_t *) &fnic_eth_hdr_fcoe,
> > +		   sizeof(struct fnic_eth_hdr_s));
> > +	len = sizeof(struct fnic_eth_hdr_s);
> >   
> > -	spin_lock_irqsave(&fnic->wq_lock[0], flags);
> > +	memcpy(ethhdr->src_mac, srcmac, ETH_ALEN);
> > +	memcpy(ethhdr->dst_mac, dstmac, ETH_ALEN);
> >   
> > -	if (!vnic_wq_desc_avail(wq)) {
> > -		dma_unmap_single(&fnic->pdev->dev, pa, tot_len, DMA_TO_DEVICE);
> > -		ret = -1;
> > -		goto irq_restore;
> > -	}
> > +	memcpy(frame + len, (uint8_t *) &fnic_fcoe_hdr,
> > +		   sizeof(struct fnic_fcoe_hdr_s));
> > +	len += sizeof(struct fnic_fcoe_hdr_s);
> >   
> > -	fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp),
> > -			   0 /* hw inserts cos value */,
> > -			   fnic->vlan_id, 1, 1, 1);
> > +	memcpy(frame + len, (uint8_t *) payload, payload_sz);
> > +	len += payload_sz;
> >   
> > -irq_restore:
> > -	spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
> > +	/*
> > +	 * Queue frame if in a transitional state.
> > +	 * This occurs while registering the Port_ID / MAC address after FLOGI.
> > +	 */
> > +	if ((fnic->state != FNIC_IN_FC_MODE)
> > +		&& (fnic->state != FNIC_IN_ETH_MODE)) {
> > +		frame_elem = kmalloc(sizeof(struct fnic_frame_list), GFP_ATOMIC);
> > +		if (!frame_elem) {
> > +			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +						 "Failed to allocate memory for fnic_frame_list: %ld\n",
> > +						 sizeof(struct fnic_frame_list));
> > +			return -ENOMEM;
> > +		}
> > +		memset(frame_elem, 0, sizeof(struct fnic_frame_list));
> >   
> > -free_skb_on_err:
> > -	if (ret)
> > -		dev_kfree_skb_any(fp_skb(fp));
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "Queuing frame: 0x%p\n", frame);
> >   
> > +		frame_elem->fp = frame;
> > +		frame_elem->frame_len = len;
> > +		list_add_tail(&frame_elem->links, &fnic->tx_queue);
> > +		return 0;
> > +	}
> > +
> > +	ret = fnic_send_frame(fnic, frame, len);
> >   	return ret;
> >   }
> >   
> > -/*
> > - * fnic_send
> > - * Routine to send a raw frame
> > - */
> > -int fnic_send(struct fc_lport *lp, struct fc_frame *fp)
> > +int fnic_send_fcoe_frame(struct fnic_iport_s *iport, void *payload,
> > +						 int payload_sz)
> >   {
> > -	struct fnic *fnic = lport_priv(lp);
> > -	unsigned long flags;
> > +	struct fnic *fnic = iport->fnic;
> > +	uint8_t *dstmac, *srcmac;
> > +	int ret = 0;
> >   
> > +	/* If module unload is in-progress, don't send */
> >   	if (fnic->in_remove) {
> > -		dev_kfree_skb(fp_skb(fp));
> >   		return -1;
> >   	}
> >   
> > -	/*
> > -	 * Queue frame if in a transitional state.
> > -	 * This occurs while registering the Port_ID / MAC address after FLOGI.
> > -	 */
> > -	spin_lock_irqsave(&fnic->fnic_lock, flags);
> > -	if (fnic->state != FNIC_IN_FC_MODE && fnic->state != FNIC_IN_ETH_MODE) {
> > -		skb_queue_tail(&fnic->tx_queue, fp_skb(fp));
> > -		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > -		return 0;
> > +	if (iport->fabric.flags & FNIC_FDLS_FPMA_LEARNT) {
> > +		srcmac = iport->fpma;
> > +		dstmac = iport->fcfmac;
> > +	} else {
> > +		srcmac = iport->hwmac;
> > +		dstmac = FCOE_ALL_FCF_MAC;
> >   	}
> > -	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> >   
> > -	return fnic_send_frame(fnic, fp);
> > +	ret = fdls_send_fcoe_frame(fnic, payload, payload_sz, srcmac, dstmac);
> > +	return ret;
> >   }
> >   
> >   /**
> > @@ -1193,13 +1282,64 @@ int fnic_send(struct fc_lport *lp, struct fc_frame *fp)
> >   void fnic_flush_tx(struct work_struct *work)
> >   {
> >   	struct fnic *fnic = container_of(work, struct fnic, flush_work);
> > -	struct sk_buff *skb;
> >   	struct fc_frame *fp;
> > +	struct fnic_frame_list *cur_frame, *next;
> >   
> > -	while ((skb = skb_dequeue(&fnic->tx_queue))) {
> > -		fp = (struct fc_frame *)skb;
> > -		fnic_send_frame(fnic, fp);
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "Flush queued frames");
> > +
> > +	list_for_each_entry_safe(cur_frame, next, &fnic->tx_queue, links) {
> > +		fp = cur_frame->fp;
> > +		list_del(&cur_frame->links);
> > +		fnic_send_frame(fnic, fp, cur_frame->frame_len);
> > +	}
> > +}
> > +
> > +int
> > +fnic_fdls_register_portid(struct fnic_iport_s *iport, u32 port_id,
> > +						  void *fp)
> > +{
> > +	struct fnic *fnic = iport->fnic;
> > +	struct fnic_eth_hdr_s *ethhdr;
> > +	int ret;
> > +
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "Setting port id: 0x%x fp: 0x%p fnic state: %d", port_id,
> > +				 fp, fnic->state);
> > +
> > +	if (fp) {
> > +		ethhdr = (struct fnic_eth_hdr_s *) fp;
> > +		vnic_dev_add_addr(fnic->vdev, ethhdr->dst_mac);
> > +	}
> > +
> > +	/* Change state to reflect transition to FC mode */
> > +	if (fnic->state == FNIC_IN_ETH_MODE || fnic->state == FNIC_IN_FC_MODE)
> > +		fnic->state = FNIC_IN_ETH_TRANS_FC_MODE;
> > +	else {
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +			 "Unexpected fnic state while processing FLOGI response\n");
> > +		return -1;
> >   	}
> > +
> > +	/*
> > +	 * Send FLOGI registration to firmware to set up FC mode.
> > +	 * The new address will be set up when registration completes.
> > +	 */
> > +	ret = fnic_flogi_reg_handler(fnic, port_id);
> > +	if (ret < 0) {
> > +		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +					 "FLOGI registration error ret: %d fnic state: %d\n",
> > +					 ret, fnic->state);
> > +		if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE)
> > +			fnic->state = FNIC_IN_ETH_MODE;
> > +
> > +		return -1;
> > +	}
> > +	iport->fabric.flags |= FNIC_FDLS_FPMA_LEARNT;
> > +
> > +	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > +				 "FLOGI registration success\n");
> > +	return 0;
> >   }
> >   
> >   /**
> > @@ -1240,6 +1380,17 @@ static void fnic_set_eth_mode(struct fnic *fnic)
> >   	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> >   }
> >   
> > +void fnic_free_txq(struct list_head *head)
> > +{
> > +	struct fnic_frame_list *cur_frame, *next;
> > +
> > +	list_for_each_entry_safe(cur_frame, next, head, links) {
> > +		list_del(&cur_frame->links);
> > +		kfree(cur_frame->fp);
> > +		kfree(cur_frame);
> > +	}
> > +}
> > +
> >   static void fnic_wq_complete_frame_send(struct vnic_wq *wq,
> >   					struct cq_desc *cq_desc,
> >   					struct vnic_wq_buf *buf, void *opaque)
> > @@ -1319,88 +1470,3 @@ void fnic_fcoe_reset_vlans(struct fnic *fnic)
> >   	spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> >   }
> >   
> > -void fnic_handle_fip_timer(struct fnic *fnic)
> > -{
> > -	unsigned long flags;
> > -	struct fcoe_vlan *vlan;
> > -	struct fnic_stats *fnic_stats = &fnic->fnic_stats;
> > -	u64 sol_time;
> > -
> > -	spin_lock_irqsave(&fnic->fnic_lock, flags);
> > -	if (fnic->stop_rx_link_events) {
> > -		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > -		return;
> > -	}
> > -	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > -
> > -	if (fnic->ctlr.mode == FIP_MODE_NON_FIP)
> > -		return;
> > -
> > -	spin_lock_irqsave(&fnic->vlans_lock, flags);
> > -	if (list_empty(&fnic->vlans)) {
> > -		spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> > -		/* no vlans available, try again */
> > -		if (unlikely(fnic_log_level & FNIC_FCS_LOGGING))
> > -			if (printk_ratelimit())
> > -				shost_printk(KERN_DEBUG, fnic->lport->host,
> > -						"Start VLAN Discovery\n");
> > -		fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
> > -		return;
> > -	}
> > -
> > -	vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
> > -	FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
> > -		  "fip_timer: vlan %d state %d sol_count %d\n",
> > -		  vlan->vid, vlan->state, vlan->sol_count);
> > -	switch (vlan->state) {
> > -	case FIP_VLAN_USED:
> > -		FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
> > -			  "FIP VLAN is selected for FC transaction\n");
> > -		spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> > -		break;
> > -	case FIP_VLAN_FAILED:
> > -		spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> > -		/* if all vlans are in failed state, restart vlan disc */
> > -		if (unlikely(fnic_log_level & FNIC_FCS_LOGGING))
> > -			if (printk_ratelimit())
> > -				shost_printk(KERN_DEBUG, fnic->lport->host,
> > -					  "Start VLAN Discovery\n");
> > -		fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
> > -		break;
> > -	case FIP_VLAN_SENT:
> > -		if (vlan->sol_count >= FCOE_CTLR_MAX_SOL) {
> > -			/*
> > -			 * no response on this vlan, remove  from the list.
> > -			 * Try the next vlan
> > -			 */
> > -			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > -				  "Dequeue this VLAN ID %d from list\n",
> > -				  vlan->vid);
> > -			list_del(&vlan->list);
> > -			kfree(vlan);
> > -			vlan = NULL;
> > -			if (list_empty(&fnic->vlans)) {
> > -				/* we exhausted all vlans, restart vlan disc */
> > -				spin_unlock_irqrestore(&fnic->vlans_lock,
> > -							flags);
> > -				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > -					  "fip_timer: vlan list empty, "
> > -					  "trigger vlan disc\n");
> > -				fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
> > -				return;
> > -			}
> > -			/* check the next vlan */
> > -			vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan,
> > -							list);
> > -			fnic->set_vlan(fnic, vlan->vid);
> > -			vlan->state = FIP_VLAN_SENT; /* sent now */
> > -		}
> > -		spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> > -		atomic64_inc(&fnic_stats->vlan_stats.sol_expiry_count);
> > -		vlan->sol_count++;
> > -		sol_time = jiffies + msecs_to_jiffies
> > -					(FCOE_CTLR_START_DELAY);
> > -		mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
> > -		break;
> > -	}
> > -}
> > diff --git a/drivers/scsi/fnic/fnic_fdls.h b/drivers/scsi/fnic/fnic_fdls.h
> > index fddb9390d022..095275698716 100644
> > --- a/drivers/scsi/fnic/fnic_fdls.h
> > +++ b/drivers/scsi/fnic/fnic_fdls.h
> > @@ -321,17 +321,20 @@ void fnic_fdls_recv_frame(struct fnic_iport_s *iport, void *rx_frame, int len,
> >   void fnic_fdls_link_down(struct fnic_iport_s *iport);
> >   void fdls_init_tgt_oxid_pool(struct fnic_iport_s *iport);
> >   void fdls_tgt_logout(struct fnic_iport_s *iport, struct fnic_tport_s *tport);
> > +void fdls_send_fabric_logo(struct fnic_iport_s *iport);
> > +int fnic_fdls_validate_and_get_frame_type(struct fnic_iport_s *iport,
> > +								  void *rx_frame, int len,
> > +								  int fchdr_offset);
> >   
> >   /* fnic_fcs.c */
> >   void fnic_fdls_init(struct fnic *fnic, int usefip);
> >   int fnic_send_fcoe_frame(struct fnic_iport_s *iport, void *payload,
> >   	int payload_sz);
> > -
> > +void fnic_fcoe_send_vlan_req(struct fnic *fnic);
> >   int fnic_send_fip_frame(struct fnic_iport_s *iport,
> >   	void *payload, int payload_sz);
> >   void fnic_fdls_learn_fcoe_macs(struct fnic_iport_s *iport, void *rx_frame,
> >   	uint8_t *fcid);
> > -
> >   void fnic_fdls_add_tport(struct fnic_iport_s *iport,
> >   		struct fnic_tport_s *tport, unsigned long flags);
> >   void fnic_fdls_remove_tport(struct fnic_iport_s *iport,
> > diff --git a/drivers/scsi/fnic/fnic_io.h b/drivers/scsi/fnic/fnic_io.h
> > index 5895ead20e14..6fe642cb387b 100644
> > --- a/drivers/scsi/fnic/fnic_io.h
> > +++ b/drivers/scsi/fnic/fnic_io.h
> > @@ -55,15 +55,4 @@ struct fnic_io_req {
> >   	unsigned int tag;
> >   	struct scsi_cmnd *sc; /* midlayer's cmd pointer */
> >   };
> > -
> > -enum fnic_port_speeds {
> > -	DCEM_PORTSPEED_NONE = 0,
> > -	DCEM_PORTSPEED_1G    = 1000,
> > -	DCEM_PORTSPEED_10G   = 10000,
> > -	DCEM_PORTSPEED_20G   = 20000,
> > -	DCEM_PORTSPEED_25G   = 25000,
> > -	DCEM_PORTSPEED_40G   = 40000,
> > -	DCEM_PORTSPEED_4x10G = 41000,
> > -	DCEM_PORTSPEED_100G  = 100000,
> > -};
> >   #endif /* _FNIC_IO_H_ */
> > diff --git a/drivers/scsi/fnic/fnic_main.c b/drivers/scsi/fnic/fnic_main.c
> > index 08730bdf8b03..577048e30c12 100644
> > --- a/drivers/scsi/fnic/fnic_main.c
> > +++ b/drivers/scsi/fnic/fnic_main.c
> > @@ -31,6 +31,8 @@
> >   #include "fnic_io.h"
> >   #include "fnic_fip.h"
> >   #include "fnic.h"
> > +#include "fnic_fdls.h"
> > +#include "fdls_fc.h"
> >   
> >   #define PCI_DEVICE_ID_CISCO_FNIC	0x0045
> >   
> > @@ -80,7 +82,6 @@ module_param(fnic_max_qdepth, uint, S_IRUGO|S_IWUSR);
> >   MODULE_PARM_DESC(fnic_max_qdepth, "Queue depth to report for each LUN");
> >   
> >   static struct libfc_function_template fnic_transport_template = {
> > -	.frame_send = fnic_send,
> >   	.lport_set_port_id = fnic_set_port_id,
> >   	.fcp_abort_io = fnic_empty_scsi_cleanup,
> >   	.fcp_cleanup = fnic_empty_scsi_cleanup,
> > @@ -413,7 +414,7 @@ static void fnic_fip_notify_timer(struct timer_list *t)
> >   {
> >   	struct fnic *fnic = from_timer(fnic, t, fip_timer);
> >   
> > -	fnic_handle_fip_timer(fnic);
> > +	/* Placeholder function */
> >   }
> >   
> >   static void fnic_notify_timer_start(struct fnic *fnic)
> > @@ -921,7 +922,7 @@ static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
> >   	INIT_WORK(&fnic->link_work, fnic_handle_link);
> >   	INIT_WORK(&fnic->frame_work, fnic_handle_frame);
> >   	skb_queue_head_init(&fnic->frame_queue);
> > -	skb_queue_head_init(&fnic->tx_queue);
> > +	INIT_LIST_HEAD(&fnic->tx_queue);
> >   
> >   	fc_fabric_login(lp);
> >   
> > @@ -1004,7 +1005,7 @@ static void fnic_remove(struct pci_dev *pdev)
> >   	 */
> >   	flush_workqueue(fnic_event_queue);
> >   	skb_queue_purge(&fnic->frame_queue);
> > -	skb_queue_purge(&fnic->tx_queue);
> > +	fnic_free_txq(&fnic->tx_queue);
> >   
> >   	if (fnic->config.flags & VFCF_FIP_CAPABLE) {
> >   		del_timer_sync(&fnic->fip_timer);
> > @@ -1036,7 +1037,6 @@ static void fnic_remove(struct pci_dev *pdev)
> >   	fnic_cleanup(fnic);
> >   
> >   	BUG_ON(!skb_queue_empty(&fnic->frame_queue));
> > -	BUG_ON(!skb_queue_empty(&fnic->tx_queue));
> >   
> >   	spin_lock_irqsave(&fnic_list_lock, flags);
> >   	list_del(&fnic->list);
> > diff --git a/drivers/scsi/fnic/fnic_scsi.c b/drivers/scsi/fnic/fnic_scsi.c
> > index 2ba61dba4569..295dcda4ec16 100644
> > --- a/drivers/scsi/fnic/fnic_scsi.c
> > +++ b/drivers/scsi/fnic/fnic_scsi.c
> > @@ -184,7 +184,7 @@ int fnic_fw_reset_handler(struct fnic *fnic)
> >   	fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET);
> >   
> >   	skb_queue_purge(&fnic->frame_queue);
> > -	skb_queue_purge(&fnic->tx_queue);
> > +	fnic_free_txq(&fnic->tx_queue);
> >   
> >   	/* wait for io cmpl */
> >   	while (atomic_read(&fnic->in_flight))
> > @@ -674,7 +674,7 @@ static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
> >   	 */
> >   	if (fnic->remove_wait || ret) {
> >   		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > -		skb_queue_purge(&fnic->tx_queue);
> > +		fnic_free_txq(&fnic->tx_queue);
> >   		goto reset_cmpl_handler_end;
> >   	}
> >   
> > @@ -1717,7 +1717,7 @@ static bool fnic_rport_abort_io_iter(struct scsi_cmnd *sc, void *data)
> >   	return true;
> >   }
> >   
> > -static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
> > +void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
> >   {
> >   	struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
> >   	struct fnic_rport_abort_io_iter_data iter_data = {
> 
> Cheers,
> 
> Hannes
> -- 
> Dr. Hannes Reinecke                  Kernel Storage Architect
> hare@suse.de                                +49 911 74053 688
> SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg
> HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich
> 

Regards,
Karan
diff mbox series

Patch

diff --git a/drivers/scsi/fnic/Makefile b/drivers/scsi/fnic/Makefile
index 6214a6b2e96d..3bd6b1c8b643 100644
--- a/drivers/scsi/fnic/Makefile
+++ b/drivers/scsi/fnic/Makefile
@@ -7,6 +7,7 @@  fnic-y	:= \
 	fnic_main.o \
 	fnic_res.o \
 	fnic_fcs.o \
+	fdls_disc.o \
 	fnic_scsi.o \
 	fnic_trace.o \
 	fnic_debugfs.o \
diff --git a/drivers/scsi/fnic/fdls_disc.c b/drivers/scsi/fnic/fdls_disc.c
new file mode 100644
index 000000000000..22a2d0c1c78f
--- /dev/null
+++ b/drivers/scsi/fnic/fdls_disc.c
@@ -0,0 +1,1576 @@ 
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ */
+
+#include <linux/workqueue.h>
+#include "fnic.h"
+#include "fdls_fc.h"
+#include "fnic_fdls.h"
+#include <scsi/fc/fc_fcp.h>
+#include <linux/utsname.h>
+
+static void fdls_send_rpn_id(struct fnic_iport_s *iport);
+
+/* Frame initialization */
+/*
+ * Variables:
+ * sid
+ */
+struct fc_els_s fnic_flogi_req = {
+	.fchdr = {.r_ctl = 0x22, .did = {0xFF,  0xFF,  0xFE},
+			  .type = 0x01, .f_ctl = FNIC_ELS_REQ_FCTL,
+			  .ox_id = FNIC_FLOGI_OXID, .rx_id = 0xFFFF},
+	.command = FC_ELS_FLOGI_REQ,
+	.u.csp_flogi = {.fc_ph_ver = FNIC_FC_PH_VER,
+					.b2b_credits = FNIC_FC_B2B_CREDIT,
+					.b2b_rdf_size = FNIC_FC_B2B_RDF_SZ},
+	.spc3 = {0x88, 0x00}
+};
+
+/*
+ * Variables:
+ * sid, did(nport logins), ox_id(nport logins), nport_name, node_name
+ */
+struct fc_els_s fnic_plogi_req = {
+	.fchdr = {.r_ctl = 0x22, .did = {0xFF, 0xFF, 0xFC}, .type = 0x01,
+			  .f_ctl = FNIC_ELS_REQ_FCTL, .ox_id = FNIC_PLOGI_FABRIC_OXID,
+			  .rx_id = 0xFFFF},
+	.command = FC_ELS_PLOGI_REQ,
+	.u.csp_plogi = {.fc_ph_ver = FNIC_FC_PH_VER,
+					.b2b_credits = FNIC_FC_B2B_CREDIT, .features = 0x0080,
+					.b2b_rdf_size = FNIC_FC_B2B_RDF_SZ,
+					.total_concur_seqs = FNIC_FC_CONCUR_SEQS,
+					.ro_info = FNIC_FC_RO_INFO, .e_d_tov = FNIC_E_D_TOV},
+	.spc3 = {0x88, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0xFF,
+			 0x00, 0x00, 0x00, 0x01, 0x00, 0x00}
+};
+
+/*
+ * Variables:
+ * sid, port_id, port_name
+ */
+struct fc_rpn_id_s fnic_rpn_id_req = {
+	.fchdr = {.r_ctl = 0x02, .did = {0xFF, 0xFF, 0xFC}, .type = 0x20,
+			  .f_ctl = FNIC_ELS_REQ_FCTL, .ox_id = FNIC_RPN_REQ_OXID,
+			  .rx_id = 0xFFFF},
+	.fc_ct_hdr = {.rev = 0x01, .fs_type = 0xFC, .fs_subtype = 0x02,
+				  .command = FC_CT_RPN_CMD}
+};
+
+/*
+ * Variables:
+ * fh_s_id, port_id, port_name
+ */
+struct fc_rft_id fnic_rft_id_req = {
+	.fchdr = {.r_ctl = 0x02, .did = {0xFF, 0xFF, 0xFC}, .type = 0x20,
+			  .f_ctl = FNIC_ELS_REQ_FCTL, .ox_id = FNIC_RFT_REQ_OXID,
+			  .rx_id = 0xFFFF},
+	.fc_ct_hdr = {.rev = 0x01, .fs_type = 0xFC, .fs_subtype = 0x02,
+				  .command = FC_CT_RFT_CMD}
+};
+
+/*
+ * Variables:
+ * fh_s_id, port_id, port_name
+ */
+struct fc_rff_id fnic_rff_id_req = {
+	.fchdr = {.r_ctl = 0x02, .did = {0xFF, 0xFF, 0xFC}, .type = 0x20,
+			  .f_ctl = FNIC_ELS_REQ_FCTL, .ox_id = FNIC_RFF_REQ_OXID,
+			  .rx_id = 0xFFFF},
+	.fc_ct_hdr = {.rev = 0x01, .fs_type = 0xFC, .fs_subtype = 0x02,
+				  .command = FC_CT_RFF_CMD},
+	.tgt = 0x2,
+	.fc4_type = 0x28
+};
+
+/*
+ * Variables:
+ * sid
+ */
+struct fc_gpn_ft_s fnic_gpn_ft_req = {
+	.fchdr = {.r_ctl = 0x02, .did = {0xFF, 0xFF, 0xFC}, .type = 0x20,
+			  .f_ctl = FNIC_ELS_REQ_FCTL, .ox_id = FNIC_GPN_FT_OXID,
+			  .rx_id = 0xFFFF},
+	.fc_ct_hdr = {.rev = 0x01, .fs_type = 0xFC, .fs_subtype = 0x02,
+				  .command = FC_CT_GPN_FT_CMD},
+	.fc4_type = 0x08
+};
+
+/*
+ * Variables:
+ * sid
+ */
+struct fc_scr_s fnic_scr_req = {
+	.fchdr = {.r_ctl = 0x22, .did = {0xFF, 0xFF, 0xFD}, .type = 0x01,
+			  .f_ctl = FNIC_ELS_REQ_FCTL, .ox_id = FNIC_SCR_REQ_OXID,
+			  .rx_id = 0xFFFF},
+	.command = FC_ELS_SCR,
+	.reg_func = 0x03
+};
+
+/*
+ * Variables:
+ * did, ox_id, rx_id, fcid, wwpn
+ */
+struct fc_logo_req_s fnic_logo_req = {
+	.fchdr = {.r_ctl = 0x22, .type = 0x01,
+			  .f_ctl = FNIC_ELS_REQ_FCTL},
+	.command = FC_ELS_LOGO,
+};
+
+#define RETRIES_EXHAUSTED(iport)      \
+	(iport->fabric.retry_counter == FABRIC_LOGO_MAX_RETRY)
+
+static void fdls_process_flogi_rsp(struct fnic_iport_s *iport,
+		   struct fc_hdr_s *fchdr, void *rx_frame);
+static void fnic_fdls_start_plogi(struct fnic_iport_s *iport);
+static void fdls_start_fabric_timer(struct fnic_iport_s *iport,
+			int timeout);
+
+static void
+fdls_start_fabric_timer(struct fnic_iport_s *iport, int timeout)
+{
+	u64 fabric_tov;
+	struct fnic *fnic = iport->fnic;
+
+	if (iport->fabric.timer_pending) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "iport fcid: 0x%x: Canceling fabric disc timer\n",
+					 iport->fcid);
+		fnic_del_fabric_timer_sync();
+		iport->fabric.timer_pending = 0;
+	}
+
+	if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED))
+		iport->fabric.retry_counter++;
+
+	fabric_tov = jiffies + msecs_to_jiffies(timeout);
+	mod_timer(&iport->fabric.retry_timer, round_jiffies(fabric_tov));
+	iport->fabric.timer_pending = 1;
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "fabric timer is %d ", timeout);
+}
+
+static void fdls_send_fabric_abts(struct fnic_iport_s *iport)
+{
+	uint8_t fcid[3];
+	struct fnic *fnic = iport->fnic;
+	struct fc_hdr_s fc_abts_s = {
+		.r_ctl = 0x81,			/* ABTS */
+		.did = {0xFF, 0xFF, 0xFF}, .sid = {0x00, 0x00, 0x00}, .cs_ctl =
+			0x00, .type = 0x00, .f_ctl = FNIC_REQ_ABTS_FCTL, .seq_id =
+			0x00, .df_ctl = 0x00, .seq_cnt = 0x0000, .rx_id = 0xFFFF,
+		.param = 0x00000000,	/* bit:0 = 0 Abort a exchange */
+	};
+
+	struct fc_hdr_s *pfc_abts = &fc_abts_s;
+
+	switch (iport->fabric.state) {
+	case FDLS_STATE_FABRIC_LOGO:
+		fc_abts_s.ox_id = FNIC_FLOGO_REQ_OXID;
+		fc_abts_s.did[2] = 0xFE;
+		break;
+	case FDLS_STATE_FABRIC_FLOGI:
+		fc_abts_s.ox_id = FNIC_FLOGI_OXID;
+		fc_abts_s.did[2] = 0xFE;
+		break;
+
+	case FDLS_STATE_FABRIC_PLOGI:
+		hton24(fcid, iport->fcid);
+		FNIC_SET_S_ID(pfc_abts, fcid);
+		fc_abts_s.ox_id = FNIC_PLOGI_FABRIC_OXID;
+		fc_abts_s.did[2] = 0xFC;
+		break;
+
+	case FDLS_STATE_RPN_ID:
+		hton24(fcid, iport->fcid);
+		FNIC_SET_S_ID(pfc_abts, fcid);
+		fc_abts_s.ox_id = FNIC_RPN_REQ_OXID;
+		fc_abts_s.did[2] = 0xFC;
+		break;
+
+	case FDLS_STATE_SCR:
+		hton24(fcid, iport->fcid);
+		FNIC_SET_S_ID(pfc_abts, fcid);
+		fc_abts_s.ox_id = FNIC_SCR_REQ_OXID;
+		fc_abts_s.did[2] = 0xFD;
+		break;
+
+	case FDLS_STATE_REGISTER_FC4_TYPES:
+		hton24(fcid, iport->fcid);
+		FNIC_SET_S_ID(pfc_abts, fcid);
+		fc_abts_s.ox_id = FNIC_RFT_REQ_OXID;
+		fc_abts_s.did[2] = 0xFC;
+		break;
+
+	case FDLS_STATE_REGISTER_FC4_FEATURES:
+		hton24(fcid, iport->fcid);
+		FNIC_SET_S_ID(pfc_abts, fcid);
+		fc_abts_s.ox_id = FNIC_RFF_REQ_OXID;
+		fc_abts_s.did[2] = 0xFC;
+		break;
+
+	case FDLS_STATE_GPN_FT:
+		hton24(fcid, iport->fcid);
+		FNIC_SET_S_ID(pfc_abts, fcid);
+		fc_abts_s.ox_id = FNIC_GPN_FT_OXID;
+		fc_abts_s.did[2] = 0xFC;
+		break;
+	default:
+		return;
+	}
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "FDLS sending fabric abts. iport->fabric.state: %d",
+				 iport->fabric.state);
+
+	iport->fabric.flags |= FNIC_FDLS_FABRIC_ABORT_ISSUED;
+	fnic_send_fcoe_frame(iport, &fc_abts_s, sizeof(struct fc_hdr_s));
+	/* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */
+
+	fdls_start_fabric_timer(iport, 2 * iport->r_a_tov);
+	iport->fabric.timer_pending = 1;
+}
+
+static void fdls_send_fabric_flogi(struct fnic_iport_s *iport)
+{
+	struct fc_els_s flogi;
+	struct fnic *fnic = iport->fnic;
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "0x%x: FDLS send fabric FLOGI", iport->fcid);
+
+	memcpy(&flogi, &fnic_flogi_req, sizeof(struct fc_els_s));
+	FNIC_SET_NPORT_NAME(flogi, iport->wwpn);
+	FNIC_SET_NODE_NAME(flogi, iport->wwnn);
+	FNIC_SET_RDF_SIZE(flogi.u.csp_flogi, iport->max_payload_size);
+	FNIC_SET_R_A_TOV(flogi.u.csp_flogi, iport->r_a_tov);
+	FNIC_SET_E_D_TOV(flogi.u.csp_flogi, iport->e_d_tov);
+
+	fnic_send_fcoe_frame(iport, &flogi, sizeof(struct fc_els_s));
+	/* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */
+	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
+}
+
+
+static void fdls_send_fabric_plogi(struct fnic_iport_s *iport)
+{
+	struct fc_els_s plogi;
+	struct fc_hdr_s *fchdr = &plogi.fchdr;
+	uint8_t fcid[3];
+	struct fnic *fnic = iport->fnic;
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "0x%x: FDLS send fabric PLOGI", iport->fcid);
+
+	memcpy(&plogi, &fnic_plogi_req, sizeof(struct fc_els_s));
+
+	hton24(fcid, iport->fcid);
+
+	FNIC_SET_S_ID(fchdr, fcid);
+	FNIC_SET_NPORT_NAME(plogi, iport->wwpn);
+	FNIC_SET_NODE_NAME(plogi, iport->wwnn);
+	FNIC_SET_RDF_SIZE(plogi.u.csp_plogi, iport->max_payload_size);
+
+	fnic_send_fcoe_frame(iport, &plogi, sizeof(struct fc_els_s));
+	/* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */
+	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
+}
+
+static void fdls_send_rpn_id(struct fnic_iport_s *iport)
+{
+	struct fc_rpn_id_s rpn_id;
+	uint8_t fcid[3];
+	struct fnic *fnic = iport->fnic;
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "0x%x: FDLS send RPN ID", iport->fcid);
+
+	memcpy(&rpn_id, &fnic_rpn_id_req, sizeof(struct fc_rpn_id_s));
+
+	hton24(fcid, iport->fcid);
+
+	FNIC_SET_S_ID((&rpn_id.fchdr), fcid);
+	FNIC_SET_RPN_PORT_ID((&rpn_id), fcid);
+	FNIC_SET_RPN_PORT_NAME((&rpn_id), iport->wwpn);
+
+	fnic_send_fcoe_frame(iport, &rpn_id, sizeof(struct fc_rpn_id_s));
+	/* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */
+	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
+}
+
+static void fdls_send_scr(struct fnic_iport_s *iport)
+{
+	struct fc_scr_s scr_req;
+	uint8_t fcid[3];
+	struct fnic *fnic = iport->fnic;
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "0x%x: FDLS send SCR", iport->fcid);
+
+	memcpy(&scr_req, &fnic_scr_req, sizeof(struct fc_scr_s));
+
+	hton24(fcid, iport->fcid);
+	FNIC_SET_S_ID((&scr_req.fchdr), fcid);
+
+	fnic_send_fcoe_frame(iport, &scr_req, sizeof(struct fc_scr_s));
+	/* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */
+	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
+}
+
+static void fdls_send_gpn_ft(struct fnic_iport_s *iport, int fdls_state)
+{
+	struct fc_gpn_ft_s gpn_ft;
+	uint8_t fcid[3];
+	struct fnic *fnic = iport->fnic;
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "0x%x: FDLS send GPN FT", iport->fcid);
+
+	memcpy(&gpn_ft, &fnic_gpn_ft_req, sizeof(struct fc_gpn_ft_s));
+
+	hton24(fcid, iport->fcid);
+	FNIC_SET_S_ID((&gpn_ft.fchdr), fcid);
+	fnic_send_fcoe_frame(iport, &gpn_ft, sizeof(struct fc_gpn_ft_s));
+	/* Even if fnic_send_fcoe_frame() fails we want to retry after timeout */
+	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
+	fdls_set_state((&iport->fabric), fdls_state);
+}
+
+static void fdls_send_register_fc4_types(struct fnic_iport_s *iport)
+{
+	struct fc_rft_id rft_id;
+	uint8_t fcid[3];
+	struct fnic *fnic = iport->fnic;
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "0x%x: FDLS sending FC4 Types", iport->fcid);
+
+	memset(&rft_id, 0, sizeof(struct fc_rft_id));
+	memcpy(&rft_id, &fnic_rft_id_req, sizeof(struct fc_rft_id));
+	hton24(fcid, iport->fcid);
+
+	FNIC_SET_S_ID((&rft_id.fchdr), fcid);
+	FNIC_SET_PORT_ID((&rft_id), fcid);
+	if (IS_FNIC_FCP_INITIATOR(fnic))
+		rft_id.fc4_types[2] = 1;
+
+	rft_id.fc4_types[7] = 1;
+	fnic_send_fcoe_frame(iport, &rft_id, sizeof(struct fc_rft_id));
+	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
+}
+
+static void fdls_send_register_fc4_features(struct fnic_iport_s *iport)
+{
+	struct fc_rff_id rff_id;
+	uint8_t fcid[3];
+	struct fnic *fnic = iport->fnic;
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "0x%x: FDLS sending FC4 features", iport->fcid);
+	memcpy(&rff_id, &fnic_rff_id_req, sizeof(struct fc_rff_id));
+
+	hton24(fcid, iport->fcid);
+
+	FNIC_SET_S_ID((&rff_id.fchdr), fcid);
+	FNIC_SET_PORT_ID((&rff_id), fcid);
+
+	if (IS_FNIC_FCP_INITIATOR(fnic)) {
+		rff_id.fc4_type = 0x08;
+	} else {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "0x%x: Unknown type", iport->fcid);
+	}
+
+	fnic_send_fcoe_frame(iport, &rff_id, sizeof(struct fc_rff_id));
+	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
+}
+
+/***********************************************************************
+ * fdls_send_fabric_logo
+ *
+ * \brief Send flogo to the fcf
+ *
+ * \param[in]  iport   Handle to fnic iport.
+ *
+ * \param[in]  start_timer  1 if we want to start a perodic timer else 0
+ *
+ * \retval void
+ *
+ * \locks Currently this assumes to be called with fnic lock held
+ *
+ * \note This function does not change or check the fabric state.
+ *       It the caller responsibility to set the appropriate iport fabric
+ *       state when this is called. Normall its FDLS_STATE_FABRIC_LOGO.
+ *       fdls_set_state((&iport->fabric), FDLS_STATE_FABRIC_LOGO)
+ * \note Locking can be changed and made bit granuler in future
+ *
+ ***********************************************************************/
+void fdls_send_fabric_logo(struct fnic_iport_s *iport)
+{
+	struct fc_logo_req_s logo;
+	uint8_t s_id[3];
+	uint8_t d_id[3] = { 0xFF, 0xFF, 0xFE };
+	struct fnic *fnic = iport->fnic;
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "Sending logo to fabric from iport->fcid: 0x%x",
+				 iport->fcid);
+	memcpy(&logo, &fnic_logo_req, sizeof(struct fc_logo_req_s));
+
+	hton24(s_id, iport->fcid);
+
+	FNIC_SET_S_ID((&logo.fchdr), s_id);
+	FNIC_SET_D_ID((&logo.fchdr), d_id);
+	FNIC_SET_OX_ID((&logo.fchdr), FNIC_FLOGO_REQ_OXID);
+
+	memcpy(&logo.fcid, s_id, 3);
+	logo.wwpn = htonll(iport->wwpn);
+
+	fdls_start_fabric_timer(iport, 2 * iport->e_d_tov);
+
+	iport->fabric.flags &= ~FNIC_FDLS_FABRIC_ABORT_ISSUED;
+	fnic_send_fcoe_frame(iport, &logo, sizeof(struct fc_logo_req_s));
+}
+
+void fdls_fabric_timer_callback(struct timer_list *t)
+{
+	struct fnic_fdls_fabric_s *fabric = from_timer(fabric, t, retry_timer);
+	struct fnic_iport_s *iport =
+		container_of(fabric, struct fnic_iport_s, fabric);
+	struct fnic *fnic = iport->fnic;
+	unsigned long flags;
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+		 "tp: %d fab state: %d fab retry counter: %d max_flogi_retries: %d",
+		 iport->fabric.timer_pending, iport->fabric.state,
+		 iport->fabric.retry_counter, iport->max_flogi_retries);
+
+	spin_lock_irqsave(&fnic->fnic_lock, flags);
+
+	if (!iport->fabric.timer_pending) {
+		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+		return;
+	}
+
+	if (iport->fabric.del_timer_inprogress) {
+		iport->fabric.del_timer_inprogress = 0;
+		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "fabric_del_timer inprogress(%d). Skip timer cb",
+					 iport->fabric.del_timer_inprogress);
+		return;
+	}
+
+	iport->fabric.timer_pending = 0;
+
+	/* The fabric state indicates which frames have time out, and we retry */
+	switch (iport->fabric.state) {
+	case FDLS_STATE_FABRIC_FLOGI:
+		/* Flogi received a LS_RJT with busy we retry from here */
+		if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME)
+			&& (iport->fabric.retry_counter < iport->max_flogi_retries)) {
+			iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME;
+			fdls_send_fabric_flogi(iport);
+			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+			return;
+		}
+		/* Flogi has time out 2*ed_tov send abts */
+		if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) {
+			fdls_send_fabric_abts(iport);
+		} else {
+			/* Flogi ABTS has timed out and we have waited
+			 * (2 * ra_tov), we can retry safely with same
+			 * exchange id
+			 */
+			if (iport->fabric.retry_counter < iport->max_flogi_retries) {
+				iport->fabric.flags &= ~FNIC_FDLS_FABRIC_ABORT_ISSUED;
+				fdls_send_fabric_flogi(iport);
+			} else
+				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+							 "Exceeded max FLOGI retries");
+		}
+		break;
+	case FDLS_STATE_FABRIC_PLOGI:
+		/* Plogi received a LS_RJT with busy we retry from here */
+		if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME)
+			&& (iport->fabric.retry_counter < iport->max_plogi_retries)) {
+			iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME;
+			fdls_send_fabric_plogi(iport);
+			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+			return;
+		}
+		/* Plogi has timed out 2*ed_tov send abts */
+		if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) {
+			fdls_send_fabric_abts(iport);
+		} else {
+			/* plogi ABTS has timed out and we have waited
+			 * (2 * ra_tov) can retry safely with same
+			 * exchange id
+			 */
+			if (iport->fabric.retry_counter < iport->max_plogi_retries) {
+				iport->fabric.flags &= ~FNIC_FDLS_FABRIC_ABORT_ISSUED;
+				fdls_send_fabric_plogi(iport);
+			} else
+				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+							 "Exceeded max PLOGI retries");
+		}
+		break;
+	case FDLS_STATE_RPN_ID:
+		/* Rpn_id received a LS_RJT with busy we retry from here */
+		if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME)
+			&& (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) {
+			iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME;
+			fdls_send_rpn_id(iport);
+			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+			return;
+		}
+		/* RPN have timed out send abts */
+		if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED))
+			fdls_send_fabric_abts(iport);
+		else
+			/* ABTS has timed out (2*ra_tov) */
+			fnic_fdls_start_plogi(iport);	/* go back to fabric Plogi */
+		break;
+	case FDLS_STATE_SCR:
+		/* scr received a LS_RJT with busy we retry from here */
+		if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME)
+			&& (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) {
+			iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME;
+			fdls_send_scr(iport);
+			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+			return;
+		}
+		/* scr have timed out send abts */
+		if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED))
+			fdls_send_fabric_abts(iport);
+		else {
+			/* ABTS has timed out (2*ra_tov), we give up */
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+						 "ABTS timed out. Starting PLOGI: %p", iport);
+			fnic_fdls_start_plogi(iport);
+		}
+		break;
+	case FDLS_STATE_REGISTER_FC4_TYPES:
+		/* scr received a LS_RJT with busy we retry from here */
+		if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME)
+			&& (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) {
+			iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME;
+			fdls_send_register_fc4_types(iport);
+			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+			return;
+		}
+		/* RFT_ID timed out send abts */
+		if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) {
+			fdls_send_fabric_abts(iport);
+		} else {
+			/* ABTS has timed out (2*ra_tov), we give up */
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+						 "ABTS timed out. Starting PLOGI: %p", iport);
+			fnic_fdls_start_plogi(iport);	/* go back to fabric Plogi */
+		}
+		break;
+	case FDLS_STATE_REGISTER_FC4_FEATURES:
+		/* scr received a LS_RJT with busy we retry from here */
+		if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME)
+			&& (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) {
+			iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME;
+			fdls_send_register_fc4_features(iport);
+			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+			return;
+		}
+		/* scr have timed out send abts */
+		if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED))
+			fdls_send_fabric_abts(iport);
+		else {
+			/* ABTS has timed out (2*ra_tov), we give up */
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+						 "ABTS timed out. Starting PLOGI %p", iport);
+			fnic_fdls_start_plogi(iport);	/* go back to fabric Plogi */
+		}
+		break;
+	case FDLS_STATE_RSCN_GPN_FT:
+	case FDLS_STATE_SEND_GPNFT:
+	case FDLS_STATE_GPN_FT:
+		/* GPN_FT received a LS_RJT with busy we retry from here */
+		if ((iport->fabric.flags & FNIC_FDLS_RETRY_FRAME)
+			&& (iport->fabric.retry_counter < FDLS_RETRY_COUNT)) {
+			iport->fabric.flags &= ~FNIC_FDLS_RETRY_FRAME;
+			fdls_send_gpn_ft(iport, iport->fabric.state);
+			spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+			return;
+		}
+		/* gpn_gt have timed out send abts */
+		if (!(iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)) {
+			fdls_send_fabric_abts(iport);
+		} else {
+			/*
+			 * ABTS has timed out have waited (2*ra_tov) can
+			 * retry safely with same exchange id
+			 */
+			if (iport->fabric.retry_counter < FDLS_RETRY_COUNT) {
+				fdls_send_gpn_ft(iport, iport->fabric.state);
+			} else {
+				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "ABTS timeout for fabric GPN_FT. Check name server: %p",
+					 iport);
+			}
+		}
+		break;
+	default:
+		break;
+	}
+	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+}
+
+static void fnic_fdls_start_flogi(struct fnic_iport_s *iport)
+{
+	iport->fabric.retry_counter = 0;
+	fdls_send_fabric_flogi(iport);
+	fdls_set_state((&iport->fabric), FDLS_STATE_FABRIC_FLOGI);
+	iport->fabric.flags = 0;
+}
+
+static void fnic_fdls_start_plogi(struct fnic_iport_s *iport)
+{
+	iport->fabric.retry_counter = 0;
+	fdls_send_fabric_plogi(iport);
+	fdls_set_state((&iport->fabric), FDLS_STATE_FABRIC_PLOGI);
+	iport->fabric.flags &= ~FNIC_FDLS_FABRIC_ABORT_ISSUED;
+}
+
+static void
+fdls_process_rff_id_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr)
+{
+	struct fnic *fnic = iport->fnic;
+	struct fnic_fdls_fabric_s *fdls = &iport->fabric;
+	struct fc_rff_id *rff_rsp = (struct fc_rff_id *) fchdr;
+	uint16_t rsp;
+	uint8_t reason_code;
+
+	if (fdls_get_state(fdls) != FDLS_STATE_REGISTER_FC4_FEATURES) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "RFF_ID resp recvd in state(%d). Dropping.",
+					 fdls_get_state(fdls));
+		return;
+	}
+
+	rsp = FNIC_GET_FC_CT_CMD((&rff_rsp->fc_ct_hdr));
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "0x%x: FDLS process RFF ID response: 0x%04x", iport->fcid,
+				 (uint32_t) rsp);
+
+	switch (rsp) {
+	case FC_CT_ACC:
+		if (iport->fabric.timer_pending) {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+						 "Canceling fabric disc timer %p\n", iport);
+			fnic_del_fabric_timer_sync();
+		}
+		iport->fabric.timer_pending = 0;
+		fdls->retry_counter = 0;
+		fdls_set_state((&iport->fabric), FDLS_STATE_SCR);
+		fdls_send_scr(iport);
+		break;
+	case FC_CT_REJ:
+		reason_code = rff_rsp->fc_ct_hdr.reason_code;
+		if (((reason_code == FC_CT_RJT_LOGICAL_BUSY)
+			 || (reason_code == FC_CT_RJT_BUSY))
+			&& (fdls->retry_counter < FDLS_RETRY_COUNT)) {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "RFF_ID ret FC_LS_REJ BUSY. Retry from timer routine %p",
+					 iport);
+
+			/* Retry again from the timer routine */
+			fdls->flags |= FNIC_FDLS_RETRY_FRAME;
+		} else {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "RFF_ID returned FC_LS_REJ. Halting discovery %p", iport);
+			if (iport->fabric.timer_pending) {
+				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+							 "Canceling fabric disc timer %p\n", iport);
+				fnic_del_fabric_timer_sync();
+			}
+			fdls->timer_pending = 0;
+			fdls->retry_counter = 0;
+		}
+		break;
+	default:
+		break;
+	}
+}
+
+static void
+fdls_process_rft_id_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr)
+{
+	struct fnic_fdls_fabric_s *fdls = &iport->fabric;
+	struct fc_rft_id *rft_rsp = (struct fc_rft_id *) fchdr;
+	uint16_t rsp;
+	uint8_t reason_code;
+	struct fnic *fnic = iport->fnic;
+
+	if (fdls_get_state(fdls) != FDLS_STATE_REGISTER_FC4_TYPES) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "RFT_ID resp recvd in state(%d). Dropping.",
+					 fdls_get_state(fdls));
+		return;
+	}
+
+	rsp = FNIC_GET_FC_CT_CMD((&rft_rsp->fc_ct_hdr));
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "0x%x: FDLS process RFT ID response: 0x%04x", iport->fcid,
+				 (uint32_t) rsp);
+
+	switch (rsp) {
+	case FC_CT_ACC:
+		if (iport->fabric.timer_pending) {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+						 "Canceling fabric disc timer %p\n", iport);
+			fnic_del_fabric_timer_sync();
+		}
+		iport->fabric.timer_pending = 0;
+		fdls->retry_counter = 0;
+		fdls_send_register_fc4_features(iport);
+		fdls_set_state((&iport->fabric), FDLS_STATE_REGISTER_FC4_FEATURES);
+		break;
+	case FC_CT_REJ:
+		reason_code = rft_rsp->fc_ct_hdr.reason_code;
+		if (((reason_code == FC_CT_RJT_LOGICAL_BUSY)
+			 || (reason_code == FC_CT_RJT_BUSY))
+			&& (fdls->retry_counter < FDLS_RETRY_COUNT)) {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "0x%x: RFT_ID ret FC_LS_REJ BUSY. Retry from timer routine",
+				 iport->fcid);
+
+			/* Retry again from the timer routine */
+			fdls->flags |= FNIC_FDLS_RETRY_FRAME;
+		} else {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "0x%x: RFT_ID REJ. Halting discovery reason %d expl %d",
+				 iport->fcid, reason_code,
+				 rft_rsp->fc_ct_hdr.reason_expl);
+			if (iport->fabric.timer_pending) {
+				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+							 "Canceling fabric disc timer %p\n", iport);
+				fnic_del_fabric_timer_sync();
+			}
+			fdls->timer_pending = 0;
+			fdls->retry_counter = 0;
+		}
+		break;
+	default:
+		break;
+	}
+}
+
+static void
+fdls_process_rpn_id_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr)
+{
+	struct fnic_fdls_fabric_s *fdls = &iport->fabric;
+	struct fc_rpn_id_s *rpn_rsp = (struct fc_rpn_id_s *) fchdr;
+	uint16_t rsp;
+	uint8_t reason_code;
+	struct fnic *fnic = iport->fnic;
+
+	if (fdls_get_state(fdls) != FDLS_STATE_RPN_ID) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "RPN_ID resp recvd in state(%d). Dropping.",
+					 fdls_get_state(fdls));
+		return;
+	}
+
+	rsp = FNIC_GET_FC_CT_CMD((&rpn_rsp->fc_ct_hdr));
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "0x%x: FDLS process RPN ID response: 0x%04x", iport->fcid,
+				 (uint32_t) rsp);
+
+	switch (rsp) {
+	case FC_CT_ACC:
+		if (iport->fabric.timer_pending) {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+						 "Canceling fabric disc timer %p\n", iport);
+			fnic_del_fabric_timer_sync();
+		}
+		iport->fabric.timer_pending = 0;
+		fdls->retry_counter = 0;
+		fdls_send_register_fc4_types(iport);
+		fdls_set_state((&iport->fabric), FDLS_STATE_REGISTER_FC4_TYPES);
+		break;
+	case FC_CT_REJ:
+		reason_code = rpn_rsp->fc_ct_hdr.reason_code;
+		if (((reason_code == FC_CT_RJT_LOGICAL_BUSY)
+			 || (reason_code == FC_CT_RJT_BUSY))
+			&& (fdls->retry_counter < FDLS_RETRY_COUNT)) {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "RPN_ID returned REJ BUSY. Retry from timer routine %p",
+					 iport);
+
+			/* Retry again from the timer routine */
+			fdls->flags |= FNIC_FDLS_RETRY_FRAME;
+		} else {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+						 "RPN_ID FC_LS_REJ. Halting discovery %p", iport);
+			if (iport->fabric.timer_pending) {
+				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+							 "Canceling fabric disc timer %p\n", iport);
+				fnic_del_fabric_timer_sync();
+			}
+			fdls->timer_pending = 0;
+			fdls->retry_counter = 0;
+		}
+		break;
+	default:
+		break;
+	}
+}
+
+static void
+fdls_process_scr_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr)
+{
+	struct fnic_fdls_fabric_s *fdls = &iport->fabric;
+	struct fc_scr_s *scr_rsp = (struct fc_scr_s *) fchdr;
+	struct fc_els_reject_s *els_rjt = (struct fc_els_reject_s *) fchdr;
+	struct fnic *fnic = iport->fnic;
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "FDLS process SCR response: 0x%04x",
+				 (uint32_t) scr_rsp->command);
+
+	if (fdls_get_state(fdls) != FDLS_STATE_SCR) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "SCR resp recvd in state(%d). Dropping.",
+					 fdls_get_state(fdls));
+		return;
+	}
+
+	switch (scr_rsp->command) {
+	case FC_LS_ACC:
+		if (iport->fabric.timer_pending) {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+						 "Canceling fabric disc timer %p\n", iport);
+			fnic_del_fabric_timer_sync();
+		}
+		iport->fabric.timer_pending = 0;
+		iport->fabric.retry_counter = 0;
+		fdls_send_gpn_ft(iport, FDLS_STATE_GPN_FT);
+		break;
+
+	case FC_LS_REJ:
+		if (((els_rjt->reason_code == FC_ELS_RJT_LOGICAL_BUSY)
+			 || (els_rjt->reason_code == FC_ELS_RJT_BUSY))
+			&& (fdls->retry_counter < FDLS_RETRY_COUNT)) {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+						 "SCR FC_LS_REJ BUSY. Retry from timer routine %p",
+						 iport);
+			/* Retry again from the timer routine */
+			fdls->flags |= FNIC_FDLS_RETRY_FRAME;
+		} else {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+						 "SCR returned FC_LS_REJ. Halting discovery %p",
+						 iport);
+			if (iport->fabric.timer_pending) {
+				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+							 "Canceling fabric disc timer %p\n", iport);
+				fnic_del_fabric_timer_sync();
+			}
+			fdls->timer_pending = 0;
+			fdls->retry_counter = 0;
+		}
+		break;
+
+	default:
+		break;
+	}
+}
+
+static void
+fdls_process_gpn_ft_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr,
+						int len)
+{
+	struct fnic_fdls_fabric_s *fdls = &iport->fabric;
+	struct fc_gpn_ft_s *gpn_ft_rsp = (struct fc_gpn_ft_s *) fchdr;
+	uint16_t rsp;
+	uint8_t reason_code;
+	struct fnic *fnic = iport->fnic;
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "FDLS process GPN_FT response: iport state: %d len: %d",
+				 iport->state, len);
+
+	/*
+	 * GPNFT response :-
+	 *  FDLS_STATE_GPN_FT      : GPNFT send after SCR state
+	 *  during fabric discovery(FNIC_IPORT_STATE_FABRIC_DISC)
+	 *  FDLS_STATE_RSCN_GPN_FT : GPNFT send in response to RSCN
+	 *  FDLS_STATE_SEND_GPNFT  : GPNFT send after deleting a Target,
+	 *  e.g. after receiving Target LOGO
+	 *  FDLS_STATE_TGT_DISCOVERY :Target discovery is currently in progress
+	 *  from previous GPNFT response,a new GPNFT response has come.
+	 */
+	if (!(((iport->state == FNIC_IPORT_STATE_FABRIC_DISC)
+		   && (fdls_get_state(fdls) == FDLS_STATE_GPN_FT))
+		  || ((iport->state == FNIC_IPORT_STATE_READY)
+			  && ((fdls_get_state(fdls) == FDLS_STATE_RSCN_GPN_FT)
+				  || (fdls_get_state(fdls) == FDLS_STATE_SEND_GPNFT)
+				  || (fdls_get_state(fdls) == FDLS_STATE_TGT_DISCOVERY))))) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+			 "GPNFT resp recvd in fab state(%d) iport_state(%d). Dropping.",
+			 fdls_get_state(fdls), iport->state);
+		return;
+	}
+
+	iport->state = FNIC_IPORT_STATE_READY;
+	rsp = FNIC_GET_FC_CT_CMD((&gpn_ft_rsp->fc_ct_hdr));
+
+	switch (rsp) {
+
+	case FC_CT_ACC:
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "0x%x: GPNFT_RSP accept", iport->fcid);
+		break;
+
+	case FC_CT_REJ:
+		reason_code = gpn_ft_rsp->fc_ct_hdr.reason_code;
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "0x%x: GPNFT_RSP Reject", iport->fcid);
+		break;
+
+	default:
+		break;
+	}
+}
+
+/***********************************************************************
+ * fdls_process_fabric_logo_rsp
+ *
+ * \brief Handles a flogo response from the fcf
+ *
+ * \param[in]  iport   Handle to fnic iport.
+ *
+ * \param[in]  fchdr   Incoming frame
+ *
+ * \retval void
+ *
+ *
+ ***********************************************************************/
+static void
+fdls_process_fabric_logo_rsp(struct fnic_iport_s *iport,
+							 struct fc_hdr_s *fchdr)
+{
+	struct fc_els_s *flogo_rsp = (struct fc_els_s *) fchdr;
+	struct fnic *fnic = iport->fnic;
+
+	switch (flogo_rsp->command) {
+	case FC_LS_ACC:
+		if (iport->fabric.state != FDLS_STATE_FABRIC_LOGO) {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "Flogo response. Fabric not in LOGO state. Dropping! %p",
+				 iport);
+			return;
+		}
+
+		iport->fabric.state = FDLS_STATE_FLOGO_DONE;
+		iport->state = FNIC_IPORT_STATE_LINK_WAIT;
+
+		if (iport->fabric.timer_pending) {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+						 "lport 0x%p Canceling fabric disc timer\n",
+						 iport);
+			fnic_del_fabric_timer_sync();
+		}
+		iport->fabric.timer_pending = 0;
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "Flogo response from Fabric for did: 0x%x",
+					 ntoh24(fchdr->did));
+		return;
+
+	case FC_LS_REJ:
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+			 "Flogo response from Fabric for did: 0x%x returned FC_LS_REJ",
+			 ntoh24(fchdr->did));
+		return;
+
+	default:
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "FLOGO response not accepted or rejected: 0x%x",
+					 flogo_rsp->command);
+	}
+}
+
+static void
+fdls_process_flogi_rsp(struct fnic_iport_s *iport, struct fc_hdr_s *fchdr,
+					   void *rx_frame)
+{
+	struct fnic_fdls_fabric_s *fabric = &iport->fabric;
+	struct fc_els_s *flogi_rsp = (struct fc_els_s *) fchdr;
+	uint8_t *fcid;
+	int rdf_size;
+	struct fc_els_reject_s *els_rjt;
+	uint8_t fcmac[6] = { 0x0E, 0XFC, 0x00, 0x00, 0x00, 0x00 };
+	struct fnic *fnic = iport->fnic;
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "0x%x: FDLS processing FLOGI response", iport->fcid);
+
+	if (fdls_get_state(fabric) != FDLS_STATE_FABRIC_FLOGI) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "FLOGI response received in state (%d). Dropping frame",
+					 fdls_get_state(fabric));
+		return;
+	}
+
+	switch (flogi_rsp->command) {
+	case FC_LS_ACC:
+		if (iport->fabric.timer_pending) {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+						 "iport fcid: 0x%x Canceling fabric disc timer\n",
+						 iport->fcid);
+			fnic_del_fabric_timer_sync();
+		}
+
+		iport->fabric.timer_pending = 0;
+		iport->fabric.retry_counter = 0;
+		fcid = FNIC_GET_D_ID(fchdr);
+		iport->fcid = ntoh24(fcid);
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "0x%x: FLOGI response accepted", iport->fcid);
+
+		/* Learn the Service Params */
+		rdf_size = ntohs(flogi_rsp->u.csp_flogi.b2b_rdf_size);
+		if ((rdf_size >= FNIC_MIN_DATA_FIELD_SIZE)
+			&& (rdf_size < FNIC_FC_MAX_PAYLOAD_LEN))
+			iport->max_payload_size = MIN(rdf_size,
+								  iport->max_payload_size);
+
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "max_payload_size from fabric: %d set: %d", rdf_size,
+					 iport->max_payload_size);
+
+		iport->r_a_tov = ntohl(flogi_rsp->u.csp_flogi.r_a_tov);
+		iport->e_d_tov = ntohl(flogi_rsp->u.csp_flogi.e_d_tov);
+
+		if (flogi_rsp->u.csp_flogi.features & FNIC_FC_EDTOV_NSEC)
+			iport->e_d_tov = iport->e_d_tov / FNIC_NSEC_TO_MSEC;
+
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "From fabric: R_A_TOV: %d E_D_TOV: %d",
+					 iport->r_a_tov, iport->e_d_tov);
+
+		if (IS_FNIC_FCP_INITIATOR(fnic)) {
+			fc_host_fabric_name(iport->fnic->lport->host) =
+				get_unaligned_be64(&flogi_rsp->node_name);
+			fc_host_port_id(iport->fnic->lport->host) = iport->fcid;
+		}
+
+		fnic_fdls_learn_fcoe_macs(iport, rx_frame, fcid);
+
+		memcpy(&fcmac[3], fcid, 3);
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+			 "Adding vNIC device MAC addr: %02x:%02x:%02x:%02x:%02x:%02x",
+			 fcmac[0], fcmac[1], fcmac[2], fcmac[3], fcmac[4],
+			 fcmac[5]);
+		vnic_dev_add_addr(iport->fnic->vdev, fcmac);
+
+		if (fdls_get_state(fabric) == FDLS_STATE_FABRIC_FLOGI) {
+			fnic_fdls_start_plogi(iport);
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+						 "FLOGI response received. Starting PLOGI");
+		} else {
+			/* From FDLS_STATE_FABRIC_FLOGI state fabric can only go to
+			 * FDLS_STATE_LINKDOWN
+			 * state, hence we don't have to worry about undoing:
+			 * the fnic_fdls_register_portid and vnic_dev_add_addr
+			 */
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "FLOGI response received in state (%d). Dropping frame",
+				 fdls_get_state(fabric));
+		}
+		break;
+
+	case FC_LS_REJ:
+		els_rjt = (struct fc_els_reject_s *) fchdr;
+		if (fabric->retry_counter < iport->max_flogi_retries) {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "FLOGI returned FC_LS_REJ BUSY. Retry from timer routine %p",
+				 iport);
+
+			/* Retry Flogi again from the timer routine. */
+			fabric->flags |= FNIC_FDLS_RETRY_FRAME;
+
+		} else {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "FLOGI returned FC_LS_REJ. Halting discovery %p", iport);
+			if (iport->fabric.timer_pending) {
+				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+							 "iport 0x%p Canceling fabric disc timer\n",
+							 iport);
+				fnic_del_fabric_timer_sync();
+			}
+			fabric->timer_pending = 0;
+			fabric->retry_counter = 0;
+		}
+		break;
+
+	default:
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "FLOGI response not accepted: 0x%x",
+					 flogi_rsp->command);
+		break;
+	}
+}
+
+static void
+fdls_process_fabric_plogi_rsp(struct fnic_iport_s *iport,
+							  struct fc_hdr_s *fchdr)
+{
+	struct fc_els_s *plogi_rsp = (struct fc_els_s *) fchdr;
+	struct fc_els_reject_s *els_rjt = (struct fc_els_reject_s *) fchdr;
+	struct fnic *fnic = iport->fnic;
+
+	if (fdls_get_state((&iport->fabric)) != FDLS_STATE_FABRIC_PLOGI) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+			 "Fabric PLOGI response received in state (%d). Dropping frame",
+			 fdls_get_state(&iport->fabric));
+		return;
+	}
+
+	switch (plogi_rsp->command) {
+	case FC_LS_ACC:
+		if (iport->fabric.timer_pending) {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "iport fcid: 0x%x fabric PLOGI response: Accepted\n",
+				 iport->fcid);
+			fnic_del_fabric_timer_sync();
+		}
+		iport->fabric.timer_pending = 0;
+		iport->fabric.retry_counter = 0;
+		fdls_set_state(&iport->fabric, FDLS_STATE_RPN_ID);
+		fdls_send_rpn_id(iport);
+		break;
+	case FC_LS_REJ:
+		if (((els_rjt->reason_code == FC_ELS_RJT_LOGICAL_BUSY)
+			 || (els_rjt->reason_code == FC_ELS_RJT_BUSY))
+			&& (iport->fabric.retry_counter < iport->max_plogi_retries)) {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "0x%x: Fabric PLOGI FC_LS_REJ BUSY. Retry from timer routine",
+				 iport->fcid);
+		} else {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "0x%x: Fabric PLOGI FC_LS_REJ. Halting discovery",
+				 iport->fcid);
+			if (iport->fabric.timer_pending) {
+				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+							 "iport fcid: 0x%x Canceling fabric disc timer\n",
+							 iport->fcid);
+				fnic_del_fabric_timer_sync();
+			}
+			iport->fabric.timer_pending = 0;
+			iport->fabric.retry_counter = 0;
+			return;
+		}
+		break;
+	default:
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "PLOGI response not accepted: 0x%x",
+					 plogi_rsp->command);
+		break;
+	}
+}
+
+static void
+fdls_process_fabric_abts_rsp(struct fnic_iport_s *iport,
+							 struct fc_hdr_s *fchdr)
+{
+	uint32_t s_id;
+	struct fc_abts_ba_acc_s *ba_acc = (struct fc_abts_ba_acc_s *) fchdr;
+	struct fc_abts_ba_rjt_s *ba_rjt;
+	uint32_t fabric_state = iport->fabric.state;
+	struct fnic *fnic = iport->fnic;
+
+	s_id = ntoh24(fchdr->sid);
+	ba_rjt = (struct fc_abts_ba_rjt_s *) fchdr;
+
+	if (!((s_id == FC_DIR_SERVER) || (s_id == FC_DOMAIN_CONTR)
+		  || (s_id == FC_FABRIC_CONTROLLER))) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+			 "Received abts rsp with invalid SID: 0x%x. Dropping frame",
+			 s_id);
+		return;
+	}
+
+	if (iport->fabric.timer_pending) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "Canceling fabric disc timer %p\n", iport);
+		fnic_del_fabric_timer_sync();
+	}
+	iport->fabric.timer_pending = 0;
+	iport->fabric.flags &= ~FNIC_FDLS_FABRIC_ABORT_ISSUED;
+
+	if (fchdr->r_ctl == FNIC_BA_ACC_RCTL) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+			 "Received abts rsp BA_ACC for fabric_state: %d OX_ID: 0x%x",
+			 fabric_state, ba_acc->ox_id);
+	} else if (fchdr->r_ctl == FNIC_BA_RJT_RCTL) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+			 "BA_RJT fs: %d OX_ID: 0x%x rc: 0x%x rce: 0x%x",
+			 fabric_state, ba_rjt->fchdr.ox_id,
+			 ba_rjt->reason_code, ba_rjt->reason_explanation);
+	}
+
+	/* currently error handling/retry logic is same for ABTS BA_ACC & BA_RJT */
+	switch (fabric_state) {
+	case FDLS_STATE_FABRIC_FLOGI:
+		if (fchdr->ox_id == FNIC_FLOGI_OXID) {
+			if (iport->fabric.retry_counter < iport->max_flogi_retries)
+				fdls_send_fabric_flogi(iport);
+			else
+				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+						 "Exceeded max FLOGI retries");
+		} else {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "Unknown abts rsp OX_ID: 0x%x FABRIC_FLOGI state. Drop frame",
+				 fchdr->ox_id);
+		}
+		break;
+	case FDLS_STATE_FABRIC_LOGO:
+		if (fchdr->ox_id == FNIC_FLOGO_REQ_OXID) {
+			if (!RETRIES_EXHAUSTED(iport))
+				fdls_send_fabric_logo(iport);
+		} else {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "Unknown abts rsp OX_ID: 0x%x FABRIC_FLOGI state. Drop frame",
+				 fchdr->ox_id);
+		}
+		break;
+	case FDLS_STATE_FABRIC_PLOGI:
+		if (fchdr->ox_id == FNIC_PLOGI_FABRIC_OXID) {
+			if (iport->fabric.retry_counter < iport->max_plogi_retries)
+				fdls_send_fabric_plogi(iport);
+			else
+				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "Exceeded max PLOGI retries");
+		} else {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "Unknown abts rsp OX_ID: 0x%x FABRIC_PLOGI state. Drop frame",
+				 fchdr->ox_id);
+		}
+		break;
+
+	case FDLS_STATE_RPN_ID:
+		if (fchdr->ox_id == FNIC_RPN_REQ_OXID) {
+			if (iport->fabric.retry_counter < FDLS_RETRY_COUNT) {
+				fdls_send_rpn_id(iport);
+			} else {
+				/* go back to fabric Plogi */
+				fnic_fdls_start_plogi(iport);
+			}
+		} else {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "Unknown abts rsp OX_ID: 0x%x RPN_ID state. Drop frame",
+				 fchdr->ox_id);
+		}
+		break;
+
+	case FDLS_STATE_SCR:
+		if (fchdr->ox_id == FNIC_SCR_REQ_OXID) {
+			if (iport->fabric.retry_counter <= FDLS_RETRY_COUNT)
+				fdls_send_scr(iport);
+			else {
+				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "abts rsp fab SCR after two tries. Start fabric PLOGI %p",
+					 iport);
+				fnic_fdls_start_plogi(iport);	/* go back to fabric Plogi */
+			}
+		} else {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "Unknown abts rsp OX_ID: 0x%x SCR state. Drop frame",
+				 fchdr->ox_id);
+		}
+		break;
+	case FDLS_STATE_REGISTER_FC4_TYPES:
+		if (fchdr->ox_id == FNIC_RFT_REQ_OXID) {
+			if (iport->fabric.retry_counter <= FDLS_RETRY_COUNT) {
+				fdls_send_register_fc4_types(iport);
+			} else {
+				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "abts rsp fab RFT_ID two tries. Start fabric PLOGI %p",
+					 iport);
+				fnic_fdls_start_plogi(iport);	/* go back to fabric Plogi */
+			}
+		} else {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "Unknown abts rsp OX_ID: 0x%x RFT state. Drop frame",
+				 fchdr->ox_id);
+		}
+		break;
+	case FDLS_STATE_REGISTER_FC4_FEATURES:
+		if (fchdr->ox_id == FNIC_RFF_REQ_OXID) {
+			if (iport->fabric.retry_counter <= FDLS_RETRY_COUNT)
+				fdls_send_register_fc4_features(iport);
+			else {
+				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "abts rsp fab SCR after two tries. Start fabric PLOGI %p",
+					 iport);
+				fnic_fdls_start_plogi(iport);	/* go back to fabric Plogi */
+			}
+		} else {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "Unknown abts rsp OX_ID: 0x%x RFF state. Drop frame",
+				 fchdr->ox_id);
+		}
+		break;
+
+	case FDLS_STATE_GPN_FT:
+		if (fchdr->ox_id == FNIC_GPN_FT_OXID) {
+			if (iport->fabric.retry_counter <= FDLS_RETRY_COUNT) {
+				fdls_send_gpn_ft(iport, fabric_state);
+			} else {
+				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "abts rsp fab GPN_FT after two tries %p",
+					 iport);
+			}
+		} else {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "Unknown abts rsp OX_ID: 0x%x GPN_FT state. Drop frame",
+				 fchdr->ox_id);
+		}
+		break;
+
+	default:
+		return;
+	}
+}
+
+/*
+ * Performs a validation for all FCOE frames and return the frame type
+ */
+int
+fnic_fdls_validate_and_get_frame_type(struct fnic_iport_s *iport,
+									  void *rx_frame, int len,
+									  int fchdr_offset)
+{
+	struct fc_hdr_s *fchdr;
+	uint8_t type;
+	uint8_t *fc_payload;
+	uint16_t oxid;
+	uint32_t s_id;
+	uint32_t d_id;
+	struct fnic *fnic = iport->fnic;
+	struct fnic_fdls_fabric_s *fabric = &iport->fabric;
+
+	fchdr = (struct fc_hdr_s *) ((uint8_t *) rx_frame + fchdr_offset);
+	oxid = FNIC_GET_OX_ID(fchdr);
+	fc_payload = (uint8_t *) fchdr + sizeof(struct fc_hdr_s);
+	type = *fc_payload;
+	s_id = ntoh24(fchdr->sid);
+	d_id = ntoh24(fchdr->did);
+
+	/* some common validation */
+	if (iport->fcid)
+		if (fdls_get_state(fabric) > FDLS_STATE_FABRIC_FLOGI) {
+			if ((iport->fcid != d_id) || (!FNIC_FC_FRAME_CS_CTL(fchdr))) {
+				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+							 "invalid frame received. Dropping frame");
+				return -1;
+			}
+		}
+
+	/*  ABTS response */
+	if ((fchdr->r_ctl == FNIC_BA_ACC_RCTL)
+		|| (fchdr->r_ctl == FNIC_BA_RJT_RCTL)) {
+		if (!(FNIC_FC_FRAME_TYPE_BLS(fchdr))) {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+						 "Received ABTS invalid frame. Dropping frame");
+			return -1;
+
+		}
+		return FNIC_BLS_ABTS_RSP;
+	}
+	if ((fchdr->r_ctl == FC_ABTS_RCTL) && (FNIC_FC_FRAME_TYPE_BLS(fchdr))) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "Receiving Abort Request from s_id: 0x%x", s_id);
+		return FNIC_BLS_ABTS_REQ;
+	}
+
+	/* unsolicited requests frames */
+	if (FNIC_FC_FRAME_UNSOLICITED(fchdr)) {
+		switch (type) {
+		case FC_ELS_LOGO:
+			if ((!FNIC_FC_FRAME_FCTL_FIRST_LAST_SEQINIT(fchdr))
+				|| (!FNIC_FC_FRAME_UNSOLICITED(fchdr))
+				|| (!FNIC_FC_FRAME_TYPE_ELS(fchdr))) {
+				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+							 "Received LOGO invalid frame. Dropping frame");
+				return -1;
+			}
+			return FNIC_ELS_LOGO_REQ;
+		case FC_ELS_RSCN:
+			if ((!FNIC_FC_FRAME_FCTL_FIRST_LAST_SEQINIT(fchdr))
+				|| (!FNIC_FC_FRAME_TYPE_ELS(fchdr))
+				|| (!FNIC_FC_FRAME_UNSOLICITED(fchdr))) {
+				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+						 "Received RSCN invalid FCTL. Dropping frame");
+				return -1;
+			}
+			if (s_id != FC_FABRIC_CONTROLLER)
+				return FNIC_ELS_RSCN_REQ;
+			break;
+		case FC_ELS_PLOGI_REQ:
+			return FNIC_ELS_PLOGI_REQ;
+		case FC_ELS_ECHO_REQ:
+			return FNIC_ELS_ECHO_REQ;
+		case FNIC_ELS_ADISC_REQ:
+			return FNIC_ELS_ADISC;
+		case FC_ELS_RLS_REQ:
+			return FNIC_ELS_RLS;
+		case FC_ELS_RRQ_REQ:
+			return FNIC_ELS_RRQ;
+		default:
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "Unsupported frame (type:0x%02x) from fcid: 0x%x",
+				 type, s_id);
+			return FNIC_ELS_UNSUPPORTED_REQ;
+		}
+	}
+
+	/*response from fabric */
+	switch (oxid) {
+
+	case FNIC_FLOGO_REQ_OXID:
+		return FNIC_FABRIC_LOGO_RSP;
+
+	case FNIC_FLOGI_OXID:
+		if (type == FC_LS_ACC) {
+			if ((s_id != FC_DOMAIN_CONTR)
+				|| (!FNIC_FC_FRAME_TYPE_ELS(fchdr))) {
+				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "Received unknown frame. Dropping frame");
+				return -1;
+			}
+		}
+		return FNIC_FABRIC_FLOGI_RSP;
+
+	case FNIC_PLOGI_FABRIC_OXID:
+		if (type == FC_LS_ACC) {
+			if ((s_id != FC_DIR_SERVER)
+				|| (!FNIC_FC_FRAME_TYPE_ELS(fchdr))) {
+				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "Received unknown frame. Dropping frame");
+				return -1;
+			}
+		}
+		return FNIC_FABRIC_PLOGI_RSP;
+
+	case FNIC_SCR_REQ_OXID:
+		if (type == FC_LS_ACC) {
+			if ((s_id != FC_FABRIC_CONTROLLER)
+				|| (!FNIC_FC_FRAME_TYPE_ELS(fchdr))) {
+				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "Received unknown frame. Dropping frame");
+				return -1;
+			}
+		}
+		return FNIC_FABRIC_SCR_RSP;
+
+	case FNIC_RPN_REQ_OXID:
+		if ((s_id != FC_DIR_SERVER) || (!FNIC_FC_FRAME_TYPE_FC_GS(fchdr))) {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "Received unknown frame. Dropping frame");
+			return -1;
+		}
+		return FNIC_FABRIC_RPN_RSP;
+	case FNIC_RFT_REQ_OXID:
+		if ((s_id != FC_DIR_SERVER) || (!FNIC_FC_FRAME_TYPE_FC_GS(fchdr))) {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "Received unknown frame. Dropping frame");
+			return -1;
+		}
+		return FNIC_FABRIC_RFT_RSP;
+	case FNIC_RFF_REQ_OXID:
+		if ((s_id != FC_DIR_SERVER) || (!FNIC_FC_FRAME_TYPE_FC_GS(fchdr))) {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "Received unknown frame. Dropping frame");
+			return -1;
+		}
+		return FNIC_FABRIC_RFF_RSP;
+
+	case FNIC_GPN_FT_OXID:
+		if ((s_id != FC_DIR_SERVER) || (!FNIC_FC_FRAME_TYPE_FC_GS(fchdr))) {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "Received unknown frame. Dropping frame");
+			return -1;
+		}
+		return FNIC_FABRIC_GPN_FT_RSP;
+
+	default:
+		/* Drop the Rx frame and log/stats it */
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "Solicited response: unknown OXID: 0x%x", oxid);
+		return -1;
+	}
+	return -1;
+}
+
+void fnic_fdls_recv_frame(struct fnic_iport_s *iport, void *rx_frame,
+						  int len, int fchdr_offset)
+{
+	uint16_t oxid;
+	struct fc_hdr_s *fchdr;
+	uint32_t s_id = 0;
+	uint32_t d_id = 0;
+	struct fnic *fnic = iport->fnic;
+	int frame_type;
+
+	fchdr = (struct fc_hdr_s *) ((uint8_t *) rx_frame + fchdr_offset);
+	s_id = ntoh24(fchdr->sid);
+	d_id = ntoh24(fchdr->did);
+
+	frame_type =
+		fnic_fdls_validate_and_get_frame_type(iport, rx_frame, len,
+					  fchdr_offset);
+
+	/*if we are in flogo drop everything else */
+	if (iport->fabric.state == FDLS_STATE_FABRIC_LOGO &&
+		frame_type != FNIC_FABRIC_LOGO_RSP)
+		return;
+
+	switch (frame_type) {
+	case FNIC_FABRIC_FLOGI_RSP:
+		fdls_process_flogi_rsp(iport, fchdr, rx_frame);
+		break;
+	case FNIC_FABRIC_PLOGI_RSP:
+		fdls_process_fabric_plogi_rsp(iport, fchdr);
+		break;
+	case FNIC_FABRIC_RPN_RSP:
+		fdls_process_rpn_id_rsp(iport, fchdr);
+		break;
+	case FNIC_FABRIC_RFT_RSP:
+		fdls_process_rft_id_rsp(iport, fchdr);
+		break;
+	case FNIC_FABRIC_RFF_RSP:
+		fdls_process_rff_id_rsp(iport, fchdr);
+		break;
+	case FNIC_FABRIC_SCR_RSP:
+		fdls_process_scr_rsp(iport, fchdr);
+		break;
+	case FNIC_FABRIC_GPN_FT_RSP:
+		fdls_process_gpn_ft_rsp(iport, fchdr, len);
+		break;
+	case FNIC_FABRIC_LOGO_RSP:
+		fdls_process_fabric_logo_rsp(iport, fchdr);
+		break;
+
+	case FNIC_BLS_ABTS_RSP:
+		oxid = FNIC_GET_OX_ID(fchdr);
+		if ((iport->fabric.flags & FNIC_FDLS_FABRIC_ABORT_ISSUED)
+			&& (oxid >= FNIC_FLOGI_OXID && oxid <= FNIC_RFF_REQ_OXID)) {
+			fdls_process_fabric_abts_rsp(iport, fchdr);
+		}
+		break;
+	default:
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+			 "Received unknown FCoE frame of len: %d. Dropping frame", len);
+		break;
+	}
+}
diff --git a/drivers/scsi/fnic/fnic.h b/drivers/scsi/fnic/fnic.h
index ce73f08ee889..2d5f438f2cc4 100644
--- a/drivers/scsi/fnic/fnic.h
+++ b/drivers/scsi/fnic/fnic.h
@@ -24,6 +24,7 @@ 
 #include "vnic_intr.h"
 #include "vnic_stats.h"
 #include "vnic_scsi.h"
+#include "fnic_fdls.h"
 
 #define DRV_NAME		"fnic"
 #define DRV_DESCRIPTION		"Cisco FCoE HBA Driver"
@@ -31,6 +32,7 @@ 
 #define PFX			DRV_NAME ": "
 #define DFX                     DRV_NAME "%d: "
 
+#define FABRIC_LOGO_MAX_RETRY 3
 #define DESC_CLEAN_LOW_WATERMARK 8
 #define FNIC_UCSM_DFLT_THROTTLE_CNT_BLD	16 /* UCSM default throttle count */
 #define FNIC_MIN_IO_REQ			256 /* Min IO throttle count */
@@ -75,6 +77,8 @@ 
 #define FNIC_DEV_RST_TERM_DONE          BIT(20)
 #define FNIC_DEV_RST_ABTS_PENDING       BIT(21)
 
+#define IS_FNIC_FCP_INITIATOR(fnic) (fnic->role == FNIC_ROLE_FCP_INITIATOR)
+
 /*
  * fnic private data per SCSI command.
  * These fields are locked by the hashed io_req_lock.
@@ -213,12 +217,26 @@  enum fnic_state {
 
 struct mempool;
 
+enum fnic_role_e {
+	FNIC_ROLE_FCP_INITIATOR = 0,
+};
+
 enum fnic_evt {
 	FNIC_EVT_START_VLAN_DISC = 1,
 	FNIC_EVT_START_FCF_DISC = 2,
 	FNIC_EVT_MAX,
 };
 
+struct fnic_frame_list {
+	/*
+	 * Link to frame lists
+	 */
+	struct list_head links;
+	void *fp;
+	int frame_len;
+	int rx_ethhdr_stripped;
+};
+
 struct fnic_event {
 	struct list_head list;
 	struct fnic *fnic;
@@ -235,6 +253,8 @@  struct fnic_cpy_wq {
 /* Per-instance private data structure */
 struct fnic {
 	int fnic_num;
+	enum fnic_role_e role;
+	struct fnic_iport_s iport;
 	struct fc_lport *lport;
 	struct fcoe_ctlr ctlr;		/* FIP FCoE controller structure */
 	struct vnic_dev_bar bar0;
@@ -278,6 +298,7 @@  struct fnic {
 	unsigned long state_flags;	/* protected by host lock */
 	enum fnic_state state;
 	spinlock_t fnic_lock;
+	unsigned long lock_flags;
 
 	u16 vlan_id;	                /* VLAN tag including priority */
 	u8 data_src_addr[ETH_ALEN];
@@ -307,7 +328,7 @@  struct fnic {
 	struct work_struct frame_work;
 	struct work_struct flush_work;
 	struct sk_buff_head frame_queue;
-	struct sk_buff_head tx_queue;
+	struct list_head tx_queue;
 
 	/*** FIP related data members  -- start ***/
 	void (*set_vlan)(struct fnic *, u16 vlan);
@@ -397,7 +418,6 @@  void fnic_handle_fip_frame(struct work_struct *work);
 void fnic_handle_fip_event(struct fnic *fnic);
 void fnic_fcoe_reset_vlans(struct fnic *fnic);
 void fnic_fcoe_evlist_free(struct fnic *fnic);
-extern void fnic_handle_fip_timer(struct fnic *fnic);
 
 static inline int
 fnic_chk_state_flags_locked(struct fnic *fnic, unsigned long st_flags)
@@ -406,4 +426,6 @@  fnic_chk_state_flags_locked(struct fnic *fnic, unsigned long st_flags)
 }
 void __fnic_set_state_flags(struct fnic *, unsigned long, unsigned long);
 void fnic_dump_fchost_stats(struct Scsi_Host *, struct fc_host_statistics *);
+void fnic_free_txq(struct list_head *head);
+
 #endif /* _FNIC_H_ */
diff --git a/drivers/scsi/fnic/fnic_fcs.c b/drivers/scsi/fnic/fnic_fcs.c
index a08293b2ad9f..90d0c4c8920c 100644
--- a/drivers/scsi/fnic/fnic_fcs.c
+++ b/drivers/scsi/fnic/fnic_fcs.c
@@ -20,6 +20,8 @@ 
 #include "fnic_io.h"
 #include "fnic.h"
 #include "fnic_fip.h"
+#include "fnic_fdls.h"
+#include "fdls_fc.h"
 #include "cq_enet_desc.h"
 #include "cq_exch_desc.h"
 
@@ -28,12 +30,90 @@  struct workqueue_struct *fnic_fip_queue;
 struct workqueue_struct *fnic_event_queue;
 
 static void fnic_set_eth_mode(struct fnic *);
-static void fnic_fcoe_send_vlan_req(struct fnic *fnic);
 static void fnic_fcoe_start_fcf_disc(struct fnic *fnic);
 static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *);
 static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag);
 static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb);
 
+/* Frame initialization */
+/*
+ * Variables:
+ * dst_mac, src_mac
+ */
+struct fnic_eth_hdr_s fnic_eth_hdr_fcoe = {
+	.ether_type = 0x0689
+};
+
+/*
+ * Variables:
+ * None
+ */
+struct fnic_fcoe_hdr_s fnic_fcoe_hdr = {
+	.sof = 0x2E
+};
+
+uint8_t FCOE_ALL_FCF_MAC[6] = { 0x0e, 0xfc, 0x00, 0xff, 0xff, 0xfe };
+
+/*
+ * Internal Functions
+ * This function will initialize the src_mac address to be
+ * used in outgoing frames
+ */
+static inline void fnic_fdls_set_fcoe_srcmac(struct fnic *fnic,
+							 uint8_t *src_mac)
+{
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "Setting src mac: %02x:%02x:%02x:%02x:%02x:%02x",
+				 src_mac[0], src_mac[1], src_mac[2], src_mac[3],
+				 src_mac[4], src_mac[5]);
+
+	memcpy(fnic->iport.fpma, src_mac, 6);
+}
+
+/*
+ * This function will initialize the dst_mac address to be
+ * used in outgoing frames
+ */
+static inline  void fnic_fdls_set_fcoe_dstmac(struct fnic *fnic,
+							 uint8_t *dst_mac)
+{
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "Setting dst mac: %02x:%02x:%02x:%02x:%02x:%02x",
+				 dst_mac[0], dst_mac[1], dst_mac[2], dst_mac[3],
+				 dst_mac[4], dst_mac[5]);
+
+	memcpy(fnic->iport.fcfmac, dst_mac, 6);
+}
+
+/*
+ * FPMA can be either taken from ethhdr(dst_mac) or flogi resp
+ * or derive from FC_MAP and FCID combination. While it should be
+ * same, revisit this if there is any possibility of not-correct.
+ */
+void fnic_fdls_learn_fcoe_macs(struct fnic_iport_s *iport, void *rx_frame,
+							   uint8_t *fcid)
+{
+	struct fnic *fnic = iport->fnic;
+	struct fnic_eth_hdr_s *ethhdr = (struct fnic_eth_hdr_s *) rx_frame;
+	uint8_t fcmac[6] = { 0x0E, 0xFC, 0x00, 0x00, 0x00, 0x00 };
+
+	memcpy(&fcmac[3], fcid, 3);
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "learn fcoe: dst_mac: %02x:%02x:%02x:%02x:%02x:%02x",
+				 ethhdr->dst_mac[0], ethhdr->dst_mac[1],
+				 ethhdr->dst_mac[2], ethhdr->dst_mac[3],
+				 ethhdr->dst_mac[4], ethhdr->dst_mac[5]);
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "learn fcoe: fc_mac: %02x:%02x:%02x:%02x:%02x:%02x",
+				 fcmac[0], fcmac[1], fcmac[2], fcmac[3], fcmac[4],
+				 fcmac[5]);
+
+	fnic_fdls_set_fcoe_srcmac(fnic, fcmac);
+	fnic_fdls_set_fcoe_dstmac(fnic, ethhdr->src_mac);
+}
+
 void fnic_handle_link(struct work_struct *work)
 {
 	struct fnic *fnic = container_of(work, struct fnic, link_work);
@@ -363,7 +443,7 @@  static inline int is_fnic_fip_flogi_reject(struct fcoe_ctlr *fip,
 	return 0;
 }
 
-static void fnic_fcoe_send_vlan_req(struct fnic *fnic)
+void fnic_fcoe_send_vlan_req(struct fnic *fnic)
 {
 	struct fcoe_ctlr *fip = &fnic->ctlr;
 	struct fnic_stats *fnic_stats = &fnic->fnic_stats;
@@ -1068,116 +1148,125 @@  void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
 /*
  * Send FC frame.
  */
-static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp)
+static int fnic_send_frame(struct fnic *fnic, void *frame, int frame_len)
 {
 	struct vnic_wq *wq = &fnic->wq[0];
-	struct sk_buff *skb;
 	dma_addr_t pa;
-	struct ethhdr *eth_hdr;
-	struct vlan_ethhdr *vlan_hdr;
-	struct fcoe_hdr *fcoe_hdr;
-	struct fc_frame_header *fh;
-	u32 tot_len, eth_hdr_len;
 	int ret = 0;
 	unsigned long flags;
 
-	fh = fc_frame_header_get(fp);
-	skb = fp_skb(fp);
+	pa = dma_map_single(&fnic->pdev->dev, frame, frame_len, DMA_TO_DEVICE);
 
-	if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
-	    fcoe_ctlr_els_send(&fnic->ctlr, fnic->lport, skb))
-		return 0;
+	if ((fnic_fc_trace_set_data(fnic->fnic_num,
+								FNIC_FC_SEND | 0x80, (char *) frame,
+								frame_len)) != 0) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "fnic ctlr frame trace error");
+	}
 
-	if (!fnic->vlan_hw_insert) {
-		eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr);
-		vlan_hdr = skb_push(skb, eth_hdr_len);
-		eth_hdr = (struct ethhdr *)vlan_hdr;
-		vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
-		vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE);
-		vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
-		fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1);
-	} else {
-		eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr);
-		eth_hdr = skb_push(skb, eth_hdr_len);
-		eth_hdr->h_proto = htons(ETH_P_FCOE);
-		fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1);
+	spin_lock_irqsave(&fnic->wq_lock[0], flags);
+
+	if (!vnic_wq_desc_avail(wq)) {
+		dma_unmap_single(&fnic->pdev->dev, pa, frame_len, DMA_TO_DEVICE);
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "vnic work queue descriptor is not available");
+		ret = -1;
+		goto fnic_send_frame_end;
 	}
 
-	if (fnic->ctlr.map_dest)
-		fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
-	else
-		memcpy(eth_hdr->h_dest, fnic->ctlr.dest_addr, ETH_ALEN);
-	memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN);
+	/* hw inserts cos value */
+	fnic_queue_wq_desc(wq, frame, pa, frame_len, FNIC_FCOE_EOF,
+					   0, fnic->vlan_id, 1, 1, 1);
 
-	tot_len = skb->len;
-	BUG_ON(tot_len % 4);
+fnic_send_frame_end:
+	spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
+	return ret;
+}
 
-	memset(fcoe_hdr, 0, sizeof(*fcoe_hdr));
-	fcoe_hdr->fcoe_sof = fr_sof(fp);
-	if (FC_FCOE_VER)
-		FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER);
+static int
+fdls_send_fcoe_frame(struct fnic *fnic, void *payload, int payload_sz,
+					 uint8_t *srcmac, uint8_t *dstmac)
+{
+	uint8_t *frame;
+	struct fnic_eth_hdr_s *ethhdr;
+	struct fnic_frame_list *frame_elem;
+	int max_framesz = FNIC_FCOE_FRAME_MAXSZ;
+	int len = 0;
+	int ret;
 
-	pa = dma_map_single(&fnic->pdev->dev, eth_hdr, tot_len, DMA_TO_DEVICE);
-	if (dma_mapping_error(&fnic->pdev->dev, pa)) {
-		ret = -ENOMEM;
-		printk(KERN_ERR "DMA map failed with error %d\n", ret);
-		goto free_skb_on_err;
+	frame = kmalloc(max_framesz, GFP_ATOMIC);
+	if (!frame) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "Failed to allocate frame for flogi\n");
+		return -ENOMEM;
 	}
+	memset(frame, 0, max_framesz);
+	ethhdr = (struct fnic_eth_hdr_s *) frame;
 
-	if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_SEND,
-				(char *)eth_hdr, tot_len)) != 0) {
-		printk(KERN_ERR "fnic ctlr frame trace error!!!");
-	}
+	memcpy(frame, (uint8_t *) &fnic_eth_hdr_fcoe,
+		   sizeof(struct fnic_eth_hdr_s));
+	len = sizeof(struct fnic_eth_hdr_s);
 
-	spin_lock_irqsave(&fnic->wq_lock[0], flags);
+	memcpy(ethhdr->src_mac, srcmac, ETH_ALEN);
+	memcpy(ethhdr->dst_mac, dstmac, ETH_ALEN);
 
-	if (!vnic_wq_desc_avail(wq)) {
-		dma_unmap_single(&fnic->pdev->dev, pa, tot_len, DMA_TO_DEVICE);
-		ret = -1;
-		goto irq_restore;
-	}
+	memcpy(frame + len, (uint8_t *) &fnic_fcoe_hdr,
+		   sizeof(struct fnic_fcoe_hdr_s));
+	len += sizeof(struct fnic_fcoe_hdr_s);
 
-	fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp),
-			   0 /* hw inserts cos value */,
-			   fnic->vlan_id, 1, 1, 1);
+	memcpy(frame + len, (uint8_t *) payload, payload_sz);
+	len += payload_sz;
 
-irq_restore:
-	spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
+	/*
+	 * Queue frame if in a transitional state.
+	 * This occurs while registering the Port_ID / MAC address after FLOGI.
+	 */
+	if ((fnic->state != FNIC_IN_FC_MODE)
+		&& (fnic->state != FNIC_IN_ETH_MODE)) {
+		frame_elem = kmalloc(sizeof(struct fnic_frame_list), GFP_ATOMIC);
+		if (!frame_elem) {
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+						 "Failed to allocate memory for fnic_frame_list: %ld\n",
+						 sizeof(struct fnic_frame_list));
+			return -ENOMEM;
+		}
+		memset(frame_elem, 0, sizeof(struct fnic_frame_list));
 
-free_skb_on_err:
-	if (ret)
-		dev_kfree_skb_any(fp_skb(fp));
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "Queuing frame: 0x%p\n", frame);
 
+		frame_elem->fp = frame;
+		frame_elem->frame_len = len;
+		list_add_tail(&frame_elem->links, &fnic->tx_queue);
+		return 0;
+	}
+
+	ret = fnic_send_frame(fnic, frame, len);
 	return ret;
 }
 
-/*
- * fnic_send
- * Routine to send a raw frame
- */
-int fnic_send(struct fc_lport *lp, struct fc_frame *fp)
+int fnic_send_fcoe_frame(struct fnic_iport_s *iport, void *payload,
+						 int payload_sz)
 {
-	struct fnic *fnic = lport_priv(lp);
-	unsigned long flags;
+	struct fnic *fnic = iport->fnic;
+	uint8_t *dstmac, *srcmac;
+	int ret = 0;
 
+	/* If module unload is in-progress, don't send */
 	if (fnic->in_remove) {
-		dev_kfree_skb(fp_skb(fp));
 		return -1;
 	}
 
-	/*
-	 * Queue frame if in a transitional state.
-	 * This occurs while registering the Port_ID / MAC address after FLOGI.
-	 */
-	spin_lock_irqsave(&fnic->fnic_lock, flags);
-	if (fnic->state != FNIC_IN_FC_MODE && fnic->state != FNIC_IN_ETH_MODE) {
-		skb_queue_tail(&fnic->tx_queue, fp_skb(fp));
-		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
-		return 0;
+	if (iport->fabric.flags & FNIC_FDLS_FPMA_LEARNT) {
+		srcmac = iport->fpma;
+		dstmac = iport->fcfmac;
+	} else {
+		srcmac = iport->hwmac;
+		dstmac = FCOE_ALL_FCF_MAC;
 	}
-	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 
-	return fnic_send_frame(fnic, fp);
+	ret = fdls_send_fcoe_frame(fnic, payload, payload_sz, srcmac, dstmac);
+	return ret;
 }
 
 /**
@@ -1193,13 +1282,64 @@  int fnic_send(struct fc_lport *lp, struct fc_frame *fp)
 void fnic_flush_tx(struct work_struct *work)
 {
 	struct fnic *fnic = container_of(work, struct fnic, flush_work);
-	struct sk_buff *skb;
 	struct fc_frame *fp;
+	struct fnic_frame_list *cur_frame, *next;
 
-	while ((skb = skb_dequeue(&fnic->tx_queue))) {
-		fp = (struct fc_frame *)skb;
-		fnic_send_frame(fnic, fp);
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "Flush queued frames");
+
+	list_for_each_entry_safe(cur_frame, next, &fnic->tx_queue, links) {
+		fp = cur_frame->fp;
+		list_del(&cur_frame->links);
+		fnic_send_frame(fnic, fp, cur_frame->frame_len);
+	}
+}
+
+int
+fnic_fdls_register_portid(struct fnic_iport_s *iport, u32 port_id,
+						  void *fp)
+{
+	struct fnic *fnic = iport->fnic;
+	struct fnic_eth_hdr_s *ethhdr;
+	int ret;
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "Setting port id: 0x%x fp: 0x%p fnic state: %d", port_id,
+				 fp, fnic->state);
+
+	if (fp) {
+		ethhdr = (struct fnic_eth_hdr_s *) fp;
+		vnic_dev_add_addr(fnic->vdev, ethhdr->dst_mac);
+	}
+
+	/* Change state to reflect transition to FC mode */
+	if (fnic->state == FNIC_IN_ETH_MODE || fnic->state == FNIC_IN_FC_MODE)
+		fnic->state = FNIC_IN_ETH_TRANS_FC_MODE;
+	else {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+			 "Unexpected fnic state while processing FLOGI response\n");
+		return -1;
 	}
+
+	/*
+	 * Send FLOGI registration to firmware to set up FC mode.
+	 * The new address will be set up when registration completes.
+	 */
+	ret = fnic_flogi_reg_handler(fnic, port_id);
+	if (ret < 0) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "FLOGI registration error ret: %d fnic state: %d\n",
+					 ret, fnic->state);
+		if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE)
+			fnic->state = FNIC_IN_ETH_MODE;
+
+		return -1;
+	}
+	iport->fabric.flags |= FNIC_FDLS_FPMA_LEARNT;
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "FLOGI registration success\n");
+	return 0;
 }
 
 /**
@@ -1240,6 +1380,17 @@  static void fnic_set_eth_mode(struct fnic *fnic)
 	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 }
 
+void fnic_free_txq(struct list_head *head)
+{
+	struct fnic_frame_list *cur_frame, *next;
+
+	list_for_each_entry_safe(cur_frame, next, head, links) {
+		list_del(&cur_frame->links);
+		kfree(cur_frame->fp);
+		kfree(cur_frame);
+	}
+}
+
 static void fnic_wq_complete_frame_send(struct vnic_wq *wq,
 					struct cq_desc *cq_desc,
 					struct vnic_wq_buf *buf, void *opaque)
@@ -1319,88 +1470,3 @@  void fnic_fcoe_reset_vlans(struct fnic *fnic)
 	spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 }
 
-void fnic_handle_fip_timer(struct fnic *fnic)
-{
-	unsigned long flags;
-	struct fcoe_vlan *vlan;
-	struct fnic_stats *fnic_stats = &fnic->fnic_stats;
-	u64 sol_time;
-
-	spin_lock_irqsave(&fnic->fnic_lock, flags);
-	if (fnic->stop_rx_link_events) {
-		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
-		return;
-	}
-	spin_unlock_irqrestore(&fnic->fnic_lock, flags);
-
-	if (fnic->ctlr.mode == FIP_MODE_NON_FIP)
-		return;
-
-	spin_lock_irqsave(&fnic->vlans_lock, flags);
-	if (list_empty(&fnic->vlans)) {
-		spin_unlock_irqrestore(&fnic->vlans_lock, flags);
-		/* no vlans available, try again */
-		if (unlikely(fnic_log_level & FNIC_FCS_LOGGING))
-			if (printk_ratelimit())
-				shost_printk(KERN_DEBUG, fnic->lport->host,
-						"Start VLAN Discovery\n");
-		fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
-		return;
-	}
-
-	vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
-	FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
-		  "fip_timer: vlan %d state %d sol_count %d\n",
-		  vlan->vid, vlan->state, vlan->sol_count);
-	switch (vlan->state) {
-	case FIP_VLAN_USED:
-		FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
-			  "FIP VLAN is selected for FC transaction\n");
-		spin_unlock_irqrestore(&fnic->vlans_lock, flags);
-		break;
-	case FIP_VLAN_FAILED:
-		spin_unlock_irqrestore(&fnic->vlans_lock, flags);
-		/* if all vlans are in failed state, restart vlan disc */
-		if (unlikely(fnic_log_level & FNIC_FCS_LOGGING))
-			if (printk_ratelimit())
-				shost_printk(KERN_DEBUG, fnic->lport->host,
-					  "Start VLAN Discovery\n");
-		fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
-		break;
-	case FIP_VLAN_SENT:
-		if (vlan->sol_count >= FCOE_CTLR_MAX_SOL) {
-			/*
-			 * no response on this vlan, remove  from the list.
-			 * Try the next vlan
-			 */
-			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
-				  "Dequeue this VLAN ID %d from list\n",
-				  vlan->vid);
-			list_del(&vlan->list);
-			kfree(vlan);
-			vlan = NULL;
-			if (list_empty(&fnic->vlans)) {
-				/* we exhausted all vlans, restart vlan disc */
-				spin_unlock_irqrestore(&fnic->vlans_lock,
-							flags);
-				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
-					  "fip_timer: vlan list empty, "
-					  "trigger vlan disc\n");
-				fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
-				return;
-			}
-			/* check the next vlan */
-			vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan,
-							list);
-			fnic->set_vlan(fnic, vlan->vid);
-			vlan->state = FIP_VLAN_SENT; /* sent now */
-		}
-		spin_unlock_irqrestore(&fnic->vlans_lock, flags);
-		atomic64_inc(&fnic_stats->vlan_stats.sol_expiry_count);
-		vlan->sol_count++;
-		sol_time = jiffies + msecs_to_jiffies
-					(FCOE_CTLR_START_DELAY);
-		mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
-		break;
-	}
-}
diff --git a/drivers/scsi/fnic/fnic_fdls.h b/drivers/scsi/fnic/fnic_fdls.h
index fddb9390d022..095275698716 100644
--- a/drivers/scsi/fnic/fnic_fdls.h
+++ b/drivers/scsi/fnic/fnic_fdls.h
@@ -321,17 +321,20 @@  void fnic_fdls_recv_frame(struct fnic_iport_s *iport, void *rx_frame, int len,
 void fnic_fdls_link_down(struct fnic_iport_s *iport);
 void fdls_init_tgt_oxid_pool(struct fnic_iport_s *iport);
 void fdls_tgt_logout(struct fnic_iport_s *iport, struct fnic_tport_s *tport);
+void fdls_send_fabric_logo(struct fnic_iport_s *iport);
+int fnic_fdls_validate_and_get_frame_type(struct fnic_iport_s *iport,
+								  void *rx_frame, int len,
+								  int fchdr_offset);
 
 /* fnic_fcs.c */
 void fnic_fdls_init(struct fnic *fnic, int usefip);
 int fnic_send_fcoe_frame(struct fnic_iport_s *iport, void *payload,
 	int payload_sz);
-
+void fnic_fcoe_send_vlan_req(struct fnic *fnic);
 int fnic_send_fip_frame(struct fnic_iport_s *iport,
 	void *payload, int payload_sz);
 void fnic_fdls_learn_fcoe_macs(struct fnic_iport_s *iport, void *rx_frame,
 	uint8_t *fcid);
-
 void fnic_fdls_add_tport(struct fnic_iport_s *iport,
 		struct fnic_tport_s *tport, unsigned long flags);
 void fnic_fdls_remove_tport(struct fnic_iport_s *iport,
diff --git a/drivers/scsi/fnic/fnic_io.h b/drivers/scsi/fnic/fnic_io.h
index 5895ead20e14..6fe642cb387b 100644
--- a/drivers/scsi/fnic/fnic_io.h
+++ b/drivers/scsi/fnic/fnic_io.h
@@ -55,15 +55,4 @@  struct fnic_io_req {
 	unsigned int tag;
 	struct scsi_cmnd *sc; /* midlayer's cmd pointer */
 };
-
-enum fnic_port_speeds {
-	DCEM_PORTSPEED_NONE = 0,
-	DCEM_PORTSPEED_1G    = 1000,
-	DCEM_PORTSPEED_10G   = 10000,
-	DCEM_PORTSPEED_20G   = 20000,
-	DCEM_PORTSPEED_25G   = 25000,
-	DCEM_PORTSPEED_40G   = 40000,
-	DCEM_PORTSPEED_4x10G = 41000,
-	DCEM_PORTSPEED_100G  = 100000,
-};
 #endif /* _FNIC_IO_H_ */
diff --git a/drivers/scsi/fnic/fnic_main.c b/drivers/scsi/fnic/fnic_main.c
index 08730bdf8b03..577048e30c12 100644
--- a/drivers/scsi/fnic/fnic_main.c
+++ b/drivers/scsi/fnic/fnic_main.c
@@ -31,6 +31,8 @@ 
 #include "fnic_io.h"
 #include "fnic_fip.h"
 #include "fnic.h"
+#include "fnic_fdls.h"
+#include "fdls_fc.h"
 
 #define PCI_DEVICE_ID_CISCO_FNIC	0x0045
 
@@ -80,7 +82,6 @@  module_param(fnic_max_qdepth, uint, S_IRUGO|S_IWUSR);
 MODULE_PARM_DESC(fnic_max_qdepth, "Queue depth to report for each LUN");
 
 static struct libfc_function_template fnic_transport_template = {
-	.frame_send = fnic_send,
 	.lport_set_port_id = fnic_set_port_id,
 	.fcp_abort_io = fnic_empty_scsi_cleanup,
 	.fcp_cleanup = fnic_empty_scsi_cleanup,
@@ -413,7 +414,7 @@  static void fnic_fip_notify_timer(struct timer_list *t)
 {
 	struct fnic *fnic = from_timer(fnic, t, fip_timer);
 
-	fnic_handle_fip_timer(fnic);
+	/* Placeholder function */
 }
 
 static void fnic_notify_timer_start(struct fnic *fnic)
@@ -921,7 +922,7 @@  static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	INIT_WORK(&fnic->link_work, fnic_handle_link);
 	INIT_WORK(&fnic->frame_work, fnic_handle_frame);
 	skb_queue_head_init(&fnic->frame_queue);
-	skb_queue_head_init(&fnic->tx_queue);
+	INIT_LIST_HEAD(&fnic->tx_queue);
 
 	fc_fabric_login(lp);
 
@@ -1004,7 +1005,7 @@  static void fnic_remove(struct pci_dev *pdev)
 	 */
 	flush_workqueue(fnic_event_queue);
 	skb_queue_purge(&fnic->frame_queue);
-	skb_queue_purge(&fnic->tx_queue);
+	fnic_free_txq(&fnic->tx_queue);
 
 	if (fnic->config.flags & VFCF_FIP_CAPABLE) {
 		del_timer_sync(&fnic->fip_timer);
@@ -1036,7 +1037,6 @@  static void fnic_remove(struct pci_dev *pdev)
 	fnic_cleanup(fnic);
 
 	BUG_ON(!skb_queue_empty(&fnic->frame_queue));
-	BUG_ON(!skb_queue_empty(&fnic->tx_queue));
 
 	spin_lock_irqsave(&fnic_list_lock, flags);
 	list_del(&fnic->list);
diff --git a/drivers/scsi/fnic/fnic_scsi.c b/drivers/scsi/fnic/fnic_scsi.c
index 2ba61dba4569..295dcda4ec16 100644
--- a/drivers/scsi/fnic/fnic_scsi.c
+++ b/drivers/scsi/fnic/fnic_scsi.c
@@ -184,7 +184,7 @@  int fnic_fw_reset_handler(struct fnic *fnic)
 	fnic_set_state_flags(fnic, FNIC_FLAGS_FWRESET);
 
 	skb_queue_purge(&fnic->frame_queue);
-	skb_queue_purge(&fnic->tx_queue);
+	fnic_free_txq(&fnic->tx_queue);
 
 	/* wait for io cmpl */
 	while (atomic_read(&fnic->in_flight))
@@ -674,7 +674,7 @@  static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
 	 */
 	if (fnic->remove_wait || ret) {
 		spin_unlock_irqrestore(&fnic->fnic_lock, flags);
-		skb_queue_purge(&fnic->tx_queue);
+		fnic_free_txq(&fnic->tx_queue);
 		goto reset_cmpl_handler_end;
 	}
 
@@ -1717,7 +1717,7 @@  static bool fnic_rport_abort_io_iter(struct scsi_cmnd *sc, void *data)
 	return true;
 }
 
-static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
+void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
 {
 	struct terminate_stats *term_stats = &fnic->fnic_stats.term_stats;
 	struct fnic_rport_abort_io_iter_data iter_data = {