diff mbox series

[v2,11/15] mpi3mr: Add SAS SATA end devices to STL

Message ID 20220804131226.16653-12-sreekanth.reddy@broadcom.com
State New
Headers show
Series mpi3mr: Added Support for SAS Transport | expand

Commit Message

Sreekanth Reddy Aug. 4, 2022, 1:12 p.m. UTC 
Register/unregister the SAS, SATA devices to
SCSI Transport Layer(STL) whenever the corresponding device
is added/removed from topology.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
---
 drivers/scsi/mpi3mr/mpi3mr.h           |  10 ++
 drivers/scsi/mpi3mr/mpi3mr_os.c        |  84 ++++++++++---
 drivers/scsi/mpi3mr/mpi3mr_transport.c | 158 +++++++++++++++++++++++++
 3 files changed, 235 insertions(+), 17 deletions(-)

Comments

Himanshu Madhani Aug. 9, 2022, 5:03 p.m. UTC | #1 
> On Aug 4, 2022, at 6:12 AM, Sreekanth Reddy <sreekanth.reddy@broadcom.com> wrote:
> 
> Register/unregister the SAS, SATA devices to
> SCSI Transport Layer(STL) whenever the corresponding device
> is added/removed from topology.
> 
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
> ---
> drivers/scsi/mpi3mr/mpi3mr.h           |  10 ++
> drivers/scsi/mpi3mr/mpi3mr_os.c        |  84 ++++++++++---
> drivers/scsi/mpi3mr/mpi3mr_transport.c | 158 +++++++++++++++++++++++++
> 3 files changed, 235 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/scsi/mpi3mr/mpi3mr.h b/drivers/scsi/mpi3mr/mpi3mr.h
> index a91a57b..21ea021 100644
> --- a/drivers/scsi/mpi3mr/mpi3mr.h
> +++ b/drivers/scsi/mpi3mr/mpi3mr.h
> @@ -569,7 +569,10 @@ struct mpi3mr_enclosure_node {
>  * information cached from firmware given data
>  *
>  * @sas_address: World wide unique SAS address
> + * @sas_address_parent: Sas address of parent expander or host
>  * @dev_info: Device information bits
> + * @phy_id: Phy identifier provided in device page 0
> + * @attached_phy_id: Attached phy identifier provided in device page 0
>  * @sas_transport_attached: Is this device exposed to transport
>  * @pend_sas_rphy_add: Flag to check device is in process of add
>  * @hba_port: HBA port entry
> @@ -577,7 +580,10 @@ struct mpi3mr_enclosure_node {
>  */
> struct tgt_dev_sas_sata {
> 	u64 sas_address;
> +	u64 sas_address_parent;
> 	u16 dev_info;
> +	u8 phy_id;
> +	u8 attached_phy_id;
> 	u8 sas_transport_attached;
> 	u8 pend_sas_rphy_add;
> 	struct mpi3mr_hba_port *hba_port;
> @@ -1357,6 +1363,10 @@ void mpi3mr_update_links(struct mpi3mr_ioc *mrioc,
> 	struct mpi3mr_hba_port *hba_port);
> void mpi3mr_remove_tgtdev_from_host(struct mpi3mr_ioc *mrioc,
> 	struct mpi3mr_tgt_dev *tgtdev);
> +int mpi3mr_report_tgtdev_to_sas_transport(struct mpi3mr_ioc *mrioc,
> +	struct mpi3mr_tgt_dev *tgtdev);
> +void mpi3mr_remove_tgtdev_from_sas_transport(struct mpi3mr_ioc *mrioc,
> +	struct mpi3mr_tgt_dev *tgtdev);
> struct mpi3mr_tgt_dev *__mpi3mr_get_tgtdev_by_addr_and_rphy(
> 	struct mpi3mr_ioc *mrioc, u64 sas_address, struct sas_rphy *rphy);
> void mpi3mr_print_device_event_notice(struct mpi3mr_ioc *mrioc,
> diff --git a/drivers/scsi/mpi3mr/mpi3mr_os.c b/drivers/scsi/mpi3mr/mpi3mr_os.c
> index aed9b60..8b1b912 100644
> --- a/drivers/scsi/mpi3mr/mpi3mr_os.c
> +++ b/drivers/scsi/mpi3mr/mpi3mr_os.c
> @@ -836,19 +836,25 @@ void mpi3mr_remove_tgtdev_from_host(struct mpi3mr_ioc *mrioc,
> 		tgt_priv->dev_handle = MPI3MR_INVALID_DEV_HANDLE;
> 	}
> 
> -	if (tgtdev->starget) {
> -		if (mrioc->current_event)
> -			mrioc->current_event->pending_at_sml = 1;
> -		scsi_remove_target(&tgtdev->starget->dev);
> -		tgtdev->host_exposed = 0;
> -		if (mrioc->current_event) {
> -			mrioc->current_event->pending_at_sml = 0;
> -			if (mrioc->current_event->discard) {
> -				mpi3mr_print_device_event_notice(mrioc, false);
> -				return;
> +	if (!mrioc->sas_transport_enabled || (tgtdev->dev_type !=
> +	    MPI3_DEVICE_DEVFORM_SAS_SATA) || tgtdev->non_stl) {
> +		if (tgtdev->starget) {
> +			if (mrioc->current_event)
> +				mrioc->current_event->pending_at_sml = 1;
> +			scsi_remove_target(&tgtdev->starget->dev);
> +			tgtdev->host_exposed = 0;
> +			if (mrioc->current_event) {
> +				mrioc->current_event->pending_at_sml = 0;
> +				if (mrioc->current_event->discard) {
> +					mpi3mr_print_device_event_notice(mrioc,
> +					    false);
> +					return;
> +				}
> 			}
> 		}
> -	}
> +	} else
> +		mpi3mr_remove_tgtdev_from_sas_transport(mrioc, tgtdev);
> +
> 	ioc_info(mrioc, "%s :Removed handle(0x%04x), wwid(0x%016llx)\n",
> 	    __func__, tgtdev->dev_handle, (unsigned long long)tgtdev->wwid);
> }
> @@ -870,21 +876,25 @@ static int mpi3mr_report_tgtdev_to_host(struct mpi3mr_ioc *mrioc,
> 	int retval = 0;
> 	struct mpi3mr_tgt_dev *tgtdev;
> 
> +	if (mrioc->reset_in_progress)
> +		return -1;
> +
> 	tgtdev = mpi3mr_get_tgtdev_by_perst_id(mrioc, perst_id);
> 	if (!tgtdev) {
> 		retval = -1;
> 		goto out;
> 	}
> -	if (tgtdev->is_hidden) {
> +	if (tgtdev->is_hidden || tgtdev->host_exposed) {
> 		retval = -1;
> 		goto out;
> 	}
> -	if (!tgtdev->host_exposed && !mrioc->reset_in_progress) {
> +	if (!mrioc->sas_transport_enabled || (tgtdev->dev_type !=
> +	    MPI3_DEVICE_DEVFORM_SAS_SATA) || tgtdev->non_stl){
> 		tgtdev->host_exposed = 1;
> 		if (mrioc->current_event)
> 			mrioc->current_event->pending_at_sml = 1;
> -		scsi_scan_target(&mrioc->shost->shost_gendev, 0,
> -		    tgtdev->perst_id,
> +		scsi_scan_target(&mrioc->shost->shost_gendev,
> +		    mrioc->scsi_device_channel, tgtdev->perst_id,
> 		    SCAN_WILD_CARD, SCSI_SCAN_INITIAL);
> 		if (!tgtdev->starget)
> 			tgtdev->host_exposed = 0;
> @@ -895,7 +905,8 @@ static int mpi3mr_report_tgtdev_to_host(struct mpi3mr_ioc *mrioc,
> 				goto out;
> 			}
> 		}
> -	}
> +	} else
> +		mpi3mr_report_tgtdev_to_sas_transport(mrioc, tgtdev);
> out:
> 	if (tgtdev)
> 		mpi3mr_tgtdev_put(tgtdev);
> @@ -1087,6 +1098,9 @@ static void mpi3mr_update_tgtdev(struct mpi3mr_ioc *mrioc,
> 		tgtdev->dev_spec.sas_sata_inf.dev_info = dev_info;
> 		tgtdev->dev_spec.sas_sata_inf.sas_address =
> 		    le64_to_cpu(sasinf->sas_address);
> +		tgtdev->dev_spec.sas_sata_inf.phy_id = sasinf->phy_num;
> +		tgtdev->dev_spec.sas_sata_inf.attached_phy_id =
> +		    sasinf->attached_phy_identifier;
> 		if ((dev_info & MPI3_SAS_DEVICE_INFO_DEVICE_TYPE_MASK) !=
> 		    MPI3_SAS_DEVICE_INFO_DEVICE_TYPE_END_DEVICE)
> 			tgtdev->is_hidden = 1;
> @@ -1494,12 +1508,30 @@ static void mpi3mr_sastopochg_evt_bh(struct mpi3mr_ioc *mrioc,
> 	int i;
> 	u16 handle;
> 	u8 reason_code;
> -	u64 exp_sas_address = 0;
> +	u64 exp_sas_address = 0, parent_sas_address = 0;
> 	struct mpi3mr_hba_port *hba_port = NULL;
> 	struct mpi3mr_tgt_dev *tgtdev = NULL;
> 	struct mpi3mr_sas_node *sas_expander = NULL;
> +	unsigned long flags;
> +	u8 link_rate, prev_link_rate, parent_phy_number;
> 
> 	mpi3mr_sastopochg_evt_debug(mrioc, event_data);
> +	if (mrioc->sas_transport_enabled) {
> +		hba_port = mpi3mr_get_hba_port_by_id(mrioc,
> +		    event_data->io_unit_port);
> +		if (le16_to_cpu(event_data->expander_dev_handle)) {
> +			spin_lock_irqsave(&mrioc->sas_node_lock, flags);
> +			sas_expander = __mpi3mr_expander_find_by_handle(mrioc,
> +			    le16_to_cpu(event_data->expander_dev_handle));
> +			if (sas_expander) {
> +				exp_sas_address = sas_expander->sas_address;
> +				hba_port = sas_expander->hba_port;
> +			}
> +			spin_unlock_irqrestore(&mrioc->sas_node_lock, flags);
> +			parent_sas_address = exp_sas_address;
> +		} else
> +			parent_sas_address = mrioc->sas_hba.sas_address;
> +	}
> 
> 	for (i = 0; i < event_data->num_entries; i++) {
> 		if (fwevt->discard)
> @@ -1521,6 +1553,24 @@ static void mpi3mr_sastopochg_evt_bh(struct mpi3mr_ioc *mrioc,
> 			mpi3mr_tgtdev_del_from_list(mrioc, tgtdev);
> 			mpi3mr_tgtdev_put(tgtdev);
> 			break;
> +		case MPI3_EVENT_SAS_TOPO_PHY_RC_RESPONDING:
> +		case MPI3_EVENT_SAS_TOPO_PHY_RC_PHY_CHANGED:
> +		case MPI3_EVENT_SAS_TOPO_PHY_RC_NO_CHANGE:
> +		{
> +			if (!mrioc->sas_transport_enabled || tgtdev->non_stl
> +			    || tgtdev->is_hidden)
> +				break;
> +			link_rate = event_data->phy_entry[i].link_rate >> 4;
> +			prev_link_rate = event_data->phy_entry[i].link_rate & 0xF;
> +			if (link_rate == prev_link_rate)
> +				break;
> +			if (!parent_sas_address)
> +				break;
> +			parent_phy_number = event_data->start_phy_num + i;
> +			mpi3mr_update_links(mrioc, parent_sas_address, handle,
> +			    parent_phy_number, link_rate, hba_port);
> +			break;
> +		}
> 		default:
> 			break;
> 		}
> diff --git a/drivers/scsi/mpi3mr/mpi3mr_transport.c b/drivers/scsi/mpi3mr/mpi3mr_transport.c
> index 48cee03..706c6e6 100644
> --- a/drivers/scsi/mpi3mr/mpi3mr_transport.c
> +++ b/drivers/scsi/mpi3mr/mpi3mr_transport.c
> @@ -1652,3 +1652,161 @@ void mpi3mr_expander_remove(struct mpi3mr_ioc *mrioc, u64 sas_address,
> 		mpi3mr_expander_node_remove(mrioc, sas_expander);
> 
> }
> +
> +/**
> + * mpi3mr_get_sas_negotiated_logical_linkrate - get linkrate
> + * @mrioc: Adapter instance reference
> + * @tgtdev: Target device
> + *
> + * This function identifies whether the target device is
> + * attached directly or through expander and issues sas phy
> + * page0 or expander phy page1 and gets the link rate, if there
> + * is any failure in reading the pages then this returns link
> + * rate of 1.5.
> + *
> + * Return: logical link rate.
> + */
> +static u8 mpi3mr_get_sas_negotiated_logical_linkrate(struct mpi3mr_ioc *mrioc,
> +	struct mpi3mr_tgt_dev *tgtdev)
> +{
> +	u8 link_rate = MPI3_SAS_NEG_LINK_RATE_1_5, phy_number;
> +	struct mpi3_sas_expander_page1 expander_pg1;
> +	struct mpi3_sas_phy_page0 phy_pg0;
> +	u32 phynum_handle;
> +	u16 ioc_status;
> +
> +	phy_number = tgtdev->dev_spec.sas_sata_inf.phy_id;
> +	if (!(tgtdev->devpg0_flag & MPI3_DEVICE0_FLAGS_ATT_METHOD_DIR_ATTACHED)) {
> +		phynum_handle = ((phy_number<<MPI3_SAS_EXPAND_PGAD_PHYNUM_SHIFT)
> +				 | tgtdev->parent_handle);
> +		if (mpi3mr_cfg_get_sas_exp_pg1(mrioc, &ioc_status,
> +		    &expander_pg1, sizeof(expander_pg1),
> +		    MPI3_SAS_EXPAND_PGAD_FORM_HANDLE_PHY_NUM,
> +		    phynum_handle)) {
> +			ioc_err(mrioc, "failure at %s:%d/%s()!\n",
> +			    __FILE__, __LINE__, __func__);
> +			goto out;
> +		}
> +		if (ioc_status != MPI3_IOCSTATUS_SUCCESS) {
> +			ioc_err(mrioc, "failure at %s:%d/%s()!\n",
> +			    __FILE__, __LINE__, __func__);
> +			goto out;
> +		}
> +		link_rate = (expander_pg1.negotiated_link_rate &
> +			     MPI3_SAS_NEG_LINK_RATE_LOGICAL_MASK) >>
> +			MPI3_SAS_NEG_LINK_RATE_LOGICAL_SHIFT;
> +		goto out;
> +	}
> +	if (mpi3mr_cfg_get_sas_phy_pg0(mrioc, &ioc_status, &phy_pg0,
> +	    sizeof(struct mpi3_sas_phy_page0),
> +	    MPI3_SAS_PHY_PGAD_FORM_PHY_NUMBER, phy_number)) {
> +		ioc_err(mrioc, "failure at %s:%d/%s()!\n",
> +		    __FILE__, __LINE__, __func__);
> +		goto out;
> +	}
> +	if (ioc_status != MPI3_IOCSTATUS_SUCCESS) {
> +		ioc_err(mrioc, "failure at %s:%d/%s()!\n",
> +		    __FILE__, __LINE__, __func__);
> +		goto out;
> +	}
> +	link_rate = (phy_pg0.negotiated_link_rate &
> +		     MPI3_SAS_NEG_LINK_RATE_LOGICAL_MASK) >>
> +		MPI3_SAS_NEG_LINK_RATE_LOGICAL_SHIFT;
> +out:
> +	return link_rate;
> +}
> +
> +/**
> + * mpi3mr_report_tgtdev_to_sas_transport - expose dev to SAS TL
> + * @mrioc: Adapter instance reference
> + * @tgtdev: Target device
> + *
> + * This function exposes the target device after
> + * preparing host_phy, setting up link rate etc.
> + *
> + * Return: 0 on success, non-zero for failure.
> + */
> +int mpi3mr_report_tgtdev_to_sas_transport(struct mpi3mr_ioc *mrioc,
> +	struct mpi3mr_tgt_dev *tgtdev)
> +{
> +	int retval = 0;
> +	u8 link_rate, parent_phy_number;
> +	u64 sas_address_parent, sas_address;
> +	struct mpi3mr_hba_port *hba_port;
> +	u8 port_id;
> +
> +	if ((tgtdev->dev_type != MPI3_DEVICE_DEVFORM_SAS_SATA) ||
> +	    !mrioc->sas_transport_enabled)
> +		return -1;
> +
> +	sas_address = tgtdev->dev_spec.sas_sata_inf.sas_address;
> +	if (!mrioc->sas_hba.num_phys)
> +		mpi3mr_sas_host_add(mrioc);
> +	else
> +		mpi3mr_sas_host_refresh(mrioc);
> +
> +	if (mpi3mr_get_sas_address(mrioc, tgtdev->parent_handle,
> +	    &sas_address_parent) != 0) {
> +		ioc_err(mrioc, "failure at %s:%d/%s()!\n",
> +		    __FILE__, __LINE__, __func__);
> +		return -1;
> +	}
> +	tgtdev->dev_spec.sas_sata_inf.sas_address_parent = sas_address_parent;
> +
> +	parent_phy_number = tgtdev->dev_spec.sas_sata_inf.phy_id;
> +	port_id = tgtdev->io_unit_port;
> +
> +	hba_port = mpi3mr_get_hba_port_by_id(mrioc, port_id);
> +	if (!hba_port) {
> +		ioc_err(mrioc, "failure at %s:%d/%s()!\n",
> +		    __FILE__, __LINE__, __func__);
> +		return -1;
> +	}
> +	tgtdev->dev_spec.sas_sata_inf.hba_port = hba_port;
> +
> +	link_rate = mpi3mr_get_sas_negotiated_logical_linkrate(mrioc, tgtdev);
> +
> +	mpi3mr_update_links(mrioc, sas_address_parent, tgtdev->dev_handle,
> +	    parent_phy_number, link_rate, hba_port);
> +
> +	tgtdev->host_exposed = 1;
> +	if (!mpi3mr_sas_port_add(mrioc, tgtdev->dev_handle,
> +	    sas_address_parent, hba_port)) {
> +		tgtdev->host_exposed = 0;
> +		retval = -1;
> +	} else if ((!tgtdev->starget)) {
> +		if (!mrioc->is_driver_loading)
> +			mpi3mr_sas_port_remove(mrioc, sas_address,
> +			    sas_address_parent, hba_port);
> +		tgtdev->host_exposed = 0;
> +		retval = -1;
> +	}
> +	return retval;
> +}
> +
> +/**
> + * mpi3mr_remove_tgtdev_from_sas_transport - remove from SAS TL
> + * @mrioc: Adapter instance reference
> + * @tgtdev: Target device
> + *
> + * This function removes the target device
> + *
> + * Return: None.
> + */
> +void mpi3mr_remove_tgtdev_from_sas_transport(struct mpi3mr_ioc *mrioc,
> +	struct mpi3mr_tgt_dev *tgtdev)
> +{
> +	u64 sas_address_parent, sas_address;
> +	struct mpi3mr_hba_port *hba_port;
> +
> +	if ((tgtdev->dev_type != MPI3_DEVICE_DEVFORM_SAS_SATA) ||
> +	    !mrioc->sas_transport_enabled)
> +		return;
> +
> +	hba_port = tgtdev->dev_spec.sas_sata_inf.hba_port;
> +	sas_address = tgtdev->dev_spec.sas_sata_inf.sas_address;
> +	sas_address_parent = tgtdev->dev_spec.sas_sata_inf.sas_address_parent;
> +	mpi3mr_sas_port_remove(mrioc, sas_address, sas_address_parent,
> +	    hba_port);
> +	tgtdev->host_exposed = 0;
> +}
> -- 
> 2.27.0
> 

Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>

— 
Himanshu Madhani	Oracle Linux Engineering
diff mbox series

Patch

diff --git a/drivers/scsi/mpi3mr/mpi3mr.h b/drivers/scsi/mpi3mr/mpi3mr.h
index a91a57b..21ea021 100644
--- a/drivers/scsi/mpi3mr/mpi3mr.h
+++ b/drivers/scsi/mpi3mr/mpi3mr.h
@@ -569,7 +569,10 @@  struct mpi3mr_enclosure_node {
  * information cached from firmware given data
  *
  * @sas_address: World wide unique SAS address
+ * @sas_address_parent: Sas address of parent expander or host
  * @dev_info: Device information bits
+ * @phy_id: Phy identifier provided in device page 0
+ * @attached_phy_id: Attached phy identifier provided in device page 0
  * @sas_transport_attached: Is this device exposed to transport
  * @pend_sas_rphy_add: Flag to check device is in process of add
  * @hba_port: HBA port entry
@@ -577,7 +580,10 @@  struct mpi3mr_enclosure_node {
  */
 struct tgt_dev_sas_sata {
 	u64 sas_address;
+	u64 sas_address_parent;
 	u16 dev_info;
+	u8 phy_id;
+	u8 attached_phy_id;
 	u8 sas_transport_attached;
 	u8 pend_sas_rphy_add;
 	struct mpi3mr_hba_port *hba_port;
@@ -1357,6 +1363,10 @@  void mpi3mr_update_links(struct mpi3mr_ioc *mrioc,
 	struct mpi3mr_hba_port *hba_port);
 void mpi3mr_remove_tgtdev_from_host(struct mpi3mr_ioc *mrioc,
 	struct mpi3mr_tgt_dev *tgtdev);
+int mpi3mr_report_tgtdev_to_sas_transport(struct mpi3mr_ioc *mrioc,
+	struct mpi3mr_tgt_dev *tgtdev);
+void mpi3mr_remove_tgtdev_from_sas_transport(struct mpi3mr_ioc *mrioc,
+	struct mpi3mr_tgt_dev *tgtdev);
 struct mpi3mr_tgt_dev *__mpi3mr_get_tgtdev_by_addr_and_rphy(
 	struct mpi3mr_ioc *mrioc, u64 sas_address, struct sas_rphy *rphy);
 void mpi3mr_print_device_event_notice(struct mpi3mr_ioc *mrioc,
diff --git a/drivers/scsi/mpi3mr/mpi3mr_os.c b/drivers/scsi/mpi3mr/mpi3mr_os.c
index aed9b60..8b1b912 100644
--- a/drivers/scsi/mpi3mr/mpi3mr_os.c
+++ b/drivers/scsi/mpi3mr/mpi3mr_os.c
@@ -836,19 +836,25 @@  void mpi3mr_remove_tgtdev_from_host(struct mpi3mr_ioc *mrioc,
 		tgt_priv->dev_handle = MPI3MR_INVALID_DEV_HANDLE;
 	}
 
-	if (tgtdev->starget) {
-		if (mrioc->current_event)
-			mrioc->current_event->pending_at_sml = 1;
-		scsi_remove_target(&tgtdev->starget->dev);
-		tgtdev->host_exposed = 0;
-		if (mrioc->current_event) {
-			mrioc->current_event->pending_at_sml = 0;
-			if (mrioc->current_event->discard) {
-				mpi3mr_print_device_event_notice(mrioc, false);
-				return;
+	if (!mrioc->sas_transport_enabled || (tgtdev->dev_type !=
+	    MPI3_DEVICE_DEVFORM_SAS_SATA) || tgtdev->non_stl) {
+		if (tgtdev->starget) {
+			if (mrioc->current_event)
+				mrioc->current_event->pending_at_sml = 1;
+			scsi_remove_target(&tgtdev->starget->dev);
+			tgtdev->host_exposed = 0;
+			if (mrioc->current_event) {
+				mrioc->current_event->pending_at_sml = 0;
+				if (mrioc->current_event->discard) {
+					mpi3mr_print_device_event_notice(mrioc,
+					    false);
+					return;
+				}
 			}
 		}
-	}
+	} else
+		mpi3mr_remove_tgtdev_from_sas_transport(mrioc, tgtdev);
+
 	ioc_info(mrioc, "%s :Removed handle(0x%04x), wwid(0x%016llx)\n",
 	    __func__, tgtdev->dev_handle, (unsigned long long)tgtdev->wwid);
 }
@@ -870,21 +876,25 @@  static int mpi3mr_report_tgtdev_to_host(struct mpi3mr_ioc *mrioc,
 	int retval = 0;
 	struct mpi3mr_tgt_dev *tgtdev;
 
+	if (mrioc->reset_in_progress)
+		return -1;
+
 	tgtdev = mpi3mr_get_tgtdev_by_perst_id(mrioc, perst_id);
 	if (!tgtdev) {
 		retval = -1;
 		goto out;
 	}
-	if (tgtdev->is_hidden) {
+	if (tgtdev->is_hidden || tgtdev->host_exposed) {
 		retval = -1;
 		goto out;
 	}
-	if (!tgtdev->host_exposed && !mrioc->reset_in_progress) {
+	if (!mrioc->sas_transport_enabled || (tgtdev->dev_type !=
+	    MPI3_DEVICE_DEVFORM_SAS_SATA) || tgtdev->non_stl){
 		tgtdev->host_exposed = 1;
 		if (mrioc->current_event)
 			mrioc->current_event->pending_at_sml = 1;
-		scsi_scan_target(&mrioc->shost->shost_gendev, 0,
-		    tgtdev->perst_id,
+		scsi_scan_target(&mrioc->shost->shost_gendev,
+		    mrioc->scsi_device_channel, tgtdev->perst_id,
 		    SCAN_WILD_CARD, SCSI_SCAN_INITIAL);
 		if (!tgtdev->starget)
 			tgtdev->host_exposed = 0;
@@ -895,7 +905,8 @@  static int mpi3mr_report_tgtdev_to_host(struct mpi3mr_ioc *mrioc,
 				goto out;
 			}
 		}
-	}
+	} else
+		mpi3mr_report_tgtdev_to_sas_transport(mrioc, tgtdev);
 out:
 	if (tgtdev)
 		mpi3mr_tgtdev_put(tgtdev);
@@ -1087,6 +1098,9 @@  static void mpi3mr_update_tgtdev(struct mpi3mr_ioc *mrioc,
 		tgtdev->dev_spec.sas_sata_inf.dev_info = dev_info;
 		tgtdev->dev_spec.sas_sata_inf.sas_address =
 		    le64_to_cpu(sasinf->sas_address);
+		tgtdev->dev_spec.sas_sata_inf.phy_id = sasinf->phy_num;
+		tgtdev->dev_spec.sas_sata_inf.attached_phy_id =
+		    sasinf->attached_phy_identifier;
 		if ((dev_info & MPI3_SAS_DEVICE_INFO_DEVICE_TYPE_MASK) !=
 		    MPI3_SAS_DEVICE_INFO_DEVICE_TYPE_END_DEVICE)
 			tgtdev->is_hidden = 1;
@@ -1494,12 +1508,30 @@  static void mpi3mr_sastopochg_evt_bh(struct mpi3mr_ioc *mrioc,
 	int i;
 	u16 handle;
 	u8 reason_code;
-	u64 exp_sas_address = 0;
+	u64 exp_sas_address = 0, parent_sas_address = 0;
 	struct mpi3mr_hba_port *hba_port = NULL;
 	struct mpi3mr_tgt_dev *tgtdev = NULL;
 	struct mpi3mr_sas_node *sas_expander = NULL;
+	unsigned long flags;
+	u8 link_rate, prev_link_rate, parent_phy_number;
 
 	mpi3mr_sastopochg_evt_debug(mrioc, event_data);
+	if (mrioc->sas_transport_enabled) {
+		hba_port = mpi3mr_get_hba_port_by_id(mrioc,
+		    event_data->io_unit_port);
+		if (le16_to_cpu(event_data->expander_dev_handle)) {
+			spin_lock_irqsave(&mrioc->sas_node_lock, flags);
+			sas_expander = __mpi3mr_expander_find_by_handle(mrioc,
+			    le16_to_cpu(event_data->expander_dev_handle));
+			if (sas_expander) {
+				exp_sas_address = sas_expander->sas_address;
+				hba_port = sas_expander->hba_port;
+			}
+			spin_unlock_irqrestore(&mrioc->sas_node_lock, flags);
+			parent_sas_address = exp_sas_address;
+		} else
+			parent_sas_address = mrioc->sas_hba.sas_address;
+	}
 
 	for (i = 0; i < event_data->num_entries; i++) {
 		if (fwevt->discard)
@@ -1521,6 +1553,24 @@  static void mpi3mr_sastopochg_evt_bh(struct mpi3mr_ioc *mrioc,
 			mpi3mr_tgtdev_del_from_list(mrioc, tgtdev);
 			mpi3mr_tgtdev_put(tgtdev);
 			break;
+		case MPI3_EVENT_SAS_TOPO_PHY_RC_RESPONDING:
+		case MPI3_EVENT_SAS_TOPO_PHY_RC_PHY_CHANGED:
+		case MPI3_EVENT_SAS_TOPO_PHY_RC_NO_CHANGE:
+		{
+			if (!mrioc->sas_transport_enabled || tgtdev->non_stl
+			    || tgtdev->is_hidden)
+				break;
+			link_rate = event_data->phy_entry[i].link_rate >> 4;
+			prev_link_rate = event_data->phy_entry[i].link_rate & 0xF;
+			if (link_rate == prev_link_rate)
+				break;
+			if (!parent_sas_address)
+				break;
+			parent_phy_number = event_data->start_phy_num + i;
+			mpi3mr_update_links(mrioc, parent_sas_address, handle,
+			    parent_phy_number, link_rate, hba_port);
+			break;
+		}
 		default:
 			break;
 		}
diff --git a/drivers/scsi/mpi3mr/mpi3mr_transport.c b/drivers/scsi/mpi3mr/mpi3mr_transport.c
index 48cee03..706c6e6 100644
--- a/drivers/scsi/mpi3mr/mpi3mr_transport.c
+++ b/drivers/scsi/mpi3mr/mpi3mr_transport.c
@@ -1652,3 +1652,161 @@  void mpi3mr_expander_remove(struct mpi3mr_ioc *mrioc, u64 sas_address,
 		mpi3mr_expander_node_remove(mrioc, sas_expander);
 
 }
+
+/**
+ * mpi3mr_get_sas_negotiated_logical_linkrate - get linkrate
+ * @mrioc: Adapter instance reference
+ * @tgtdev: Target device
+ *
+ * This function identifies whether the target device is
+ * attached directly or through expander and issues sas phy
+ * page0 or expander phy page1 and gets the link rate, if there
+ * is any failure in reading the pages then this returns link
+ * rate of 1.5.
+ *
+ * Return: logical link rate.
+ */
+static u8 mpi3mr_get_sas_negotiated_logical_linkrate(struct mpi3mr_ioc *mrioc,
+	struct mpi3mr_tgt_dev *tgtdev)
+{
+	u8 link_rate = MPI3_SAS_NEG_LINK_RATE_1_5, phy_number;
+	struct mpi3_sas_expander_page1 expander_pg1;
+	struct mpi3_sas_phy_page0 phy_pg0;
+	u32 phynum_handle;
+	u16 ioc_status;
+
+	phy_number = tgtdev->dev_spec.sas_sata_inf.phy_id;
+	if (!(tgtdev->devpg0_flag & MPI3_DEVICE0_FLAGS_ATT_METHOD_DIR_ATTACHED)) {
+		phynum_handle = ((phy_number<<MPI3_SAS_EXPAND_PGAD_PHYNUM_SHIFT)
+				 | tgtdev->parent_handle);
+		if (mpi3mr_cfg_get_sas_exp_pg1(mrioc, &ioc_status,
+		    &expander_pg1, sizeof(expander_pg1),
+		    MPI3_SAS_EXPAND_PGAD_FORM_HANDLE_PHY_NUM,
+		    phynum_handle)) {
+			ioc_err(mrioc, "failure at %s:%d/%s()!\n",
+			    __FILE__, __LINE__, __func__);
+			goto out;
+		}
+		if (ioc_status != MPI3_IOCSTATUS_SUCCESS) {
+			ioc_err(mrioc, "failure at %s:%d/%s()!\n",
+			    __FILE__, __LINE__, __func__);
+			goto out;
+		}
+		link_rate = (expander_pg1.negotiated_link_rate &
+			     MPI3_SAS_NEG_LINK_RATE_LOGICAL_MASK) >>
+			MPI3_SAS_NEG_LINK_RATE_LOGICAL_SHIFT;
+		goto out;
+	}
+	if (mpi3mr_cfg_get_sas_phy_pg0(mrioc, &ioc_status, &phy_pg0,
+	    sizeof(struct mpi3_sas_phy_page0),
+	    MPI3_SAS_PHY_PGAD_FORM_PHY_NUMBER, phy_number)) {
+		ioc_err(mrioc, "failure at %s:%d/%s()!\n",
+		    __FILE__, __LINE__, __func__);
+		goto out;
+	}
+	if (ioc_status != MPI3_IOCSTATUS_SUCCESS) {
+		ioc_err(mrioc, "failure at %s:%d/%s()!\n",
+		    __FILE__, __LINE__, __func__);
+		goto out;
+	}
+	link_rate = (phy_pg0.negotiated_link_rate &
+		     MPI3_SAS_NEG_LINK_RATE_LOGICAL_MASK) >>
+		MPI3_SAS_NEG_LINK_RATE_LOGICAL_SHIFT;
+out:
+	return link_rate;
+}
+
+/**
+ * mpi3mr_report_tgtdev_to_sas_transport - expose dev to SAS TL
+ * @mrioc: Adapter instance reference
+ * @tgtdev: Target device
+ *
+ * This function exposes the target device after
+ * preparing host_phy, setting up link rate etc.
+ *
+ * Return: 0 on success, non-zero for failure.
+ */
+int mpi3mr_report_tgtdev_to_sas_transport(struct mpi3mr_ioc *mrioc,
+	struct mpi3mr_tgt_dev *tgtdev)
+{
+	int retval = 0;
+	u8 link_rate, parent_phy_number;
+	u64 sas_address_parent, sas_address;
+	struct mpi3mr_hba_port *hba_port;
+	u8 port_id;
+
+	if ((tgtdev->dev_type != MPI3_DEVICE_DEVFORM_SAS_SATA) ||
+	    !mrioc->sas_transport_enabled)
+		return -1;
+
+	sas_address = tgtdev->dev_spec.sas_sata_inf.sas_address;
+	if (!mrioc->sas_hba.num_phys)
+		mpi3mr_sas_host_add(mrioc);
+	else
+		mpi3mr_sas_host_refresh(mrioc);
+
+	if (mpi3mr_get_sas_address(mrioc, tgtdev->parent_handle,
+	    &sas_address_parent) != 0) {
+		ioc_err(mrioc, "failure at %s:%d/%s()!\n",
+		    __FILE__, __LINE__, __func__);
+		return -1;
+	}
+	tgtdev->dev_spec.sas_sata_inf.sas_address_parent = sas_address_parent;
+
+	parent_phy_number = tgtdev->dev_spec.sas_sata_inf.phy_id;
+	port_id = tgtdev->io_unit_port;
+
+	hba_port = mpi3mr_get_hba_port_by_id(mrioc, port_id);
+	if (!hba_port) {
+		ioc_err(mrioc, "failure at %s:%d/%s()!\n",
+		    __FILE__, __LINE__, __func__);
+		return -1;
+	}
+	tgtdev->dev_spec.sas_sata_inf.hba_port = hba_port;
+
+	link_rate = mpi3mr_get_sas_negotiated_logical_linkrate(mrioc, tgtdev);
+
+	mpi3mr_update_links(mrioc, sas_address_parent, tgtdev->dev_handle,
+	    parent_phy_number, link_rate, hba_port);
+
+	tgtdev->host_exposed = 1;
+	if (!mpi3mr_sas_port_add(mrioc, tgtdev->dev_handle,
+	    sas_address_parent, hba_port)) {
+		tgtdev->host_exposed = 0;
+		retval = -1;
+	} else if ((!tgtdev->starget)) {
+		if (!mrioc->is_driver_loading)
+			mpi3mr_sas_port_remove(mrioc, sas_address,
+			    sas_address_parent, hba_port);
+		tgtdev->host_exposed = 0;
+		retval = -1;
+	}
+	return retval;
+}
+
+/**
+ * mpi3mr_remove_tgtdev_from_sas_transport - remove from SAS TL
+ * @mrioc: Adapter instance reference
+ * @tgtdev: Target device
+ *
+ * This function removes the target device
+ *
+ * Return: None.
+ */
+void mpi3mr_remove_tgtdev_from_sas_transport(struct mpi3mr_ioc *mrioc,
+	struct mpi3mr_tgt_dev *tgtdev)
+{
+	u64 sas_address_parent, sas_address;
+	struct mpi3mr_hba_port *hba_port;
+
+	if ((tgtdev->dev_type != MPI3_DEVICE_DEVFORM_SAS_SATA) ||
+	    !mrioc->sas_transport_enabled)
+		return;
+
+	hba_port = tgtdev->dev_spec.sas_sata_inf.hba_port;
+	sas_address = tgtdev->dev_spec.sas_sata_inf.sas_address;
+	sas_address_parent = tgtdev->dev_spec.sas_sata_inf.sas_address_parent;
+	mpi3mr_sas_port_remove(mrioc, sas_address, sas_address_parent,
+	    hba_port);
+	tgtdev->host_exposed = 0;
+}