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Tue, 06 Apr 2021 19:04:55 -0700 (PDT) From: Kashyap Desai To: linux-scsi@vger.kernel.org Cc: Kashyap Desai , sathya.prakash@broadcom.com Subject: [PATCH v2 19/24] mpi3mr: print pending host ios for debug Date: Wed, 7 Apr 2021 07:34:46 +0530 Message-Id: <20210407020451.924822-20-kashyap.desai@broadcom.com> X-Mailer: git-send-email 2.18.1 In-Reply-To: <20210407020451.924822-1-kashyap.desai@broadcom.com> References: <20210407020451.924822-1-kashyap.desai@broadcom.com> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Signed-off-by: Kashyap Desai Reviewed-by: Hannes Reinecke Cc: sathya.prakash@broadcom.com Reviewed-by: Tomas Henzl --- drivers/scsi/mpi3mr/mpi3mr_os.c | 68 +++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) diff --git a/drivers/scsi/mpi3mr/mpi3mr_os.c b/drivers/scsi/mpi3mr/mpi3mr_os.c index 2d6f4b6b9fc6..8cf591a031b5 100644 --- a/drivers/scsi/mpi3mr/mpi3mr_os.c +++ b/drivers/scsi/mpi3mr/mpi3mr_os.c @@ -334,6 +334,36 @@ void mpi3mr_invalidate_devhandles(struct mpi3mr_ioc *mrioc) } } +/** + * mpi3mr_print_scmd - print individual SCSI command + * @rq: Block request + * @data: Adapter instance reference + * + * Print the SCSI command details if it is in LLD scope. + * + * Return: true always. + */ +static bool mpi3mr_print_scmd(struct request *rq, + void *data, bool reserved) +{ + struct mpi3mr_ioc *mrioc = (struct mpi3mr_ioc *)data; + struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); + struct scmd_priv *priv = NULL; + + if (scmd) { + priv = scsi_cmd_priv(scmd); + if (!priv->in_lld_scope) + goto out; + + ioc_info(mrioc, "%s :Host Tag = %d, qid = %d\n", + __func__, priv->host_tag, priv->req_q_idx + 1); + scsi_print_command(scmd); + } + +out: + return(true); +} + /** * mpi3mr_flush_scmd - Flush individual SCSI command @@ -2367,6 +2397,43 @@ static int mpi3mr_map_queues(struct Scsi_Host *shost) mrioc->pdev, mrioc->op_reply_q_offset); } +/** + * mpi3mr_get_fw_pending_ios - Calculate pending I/O count + * @mrioc: Adapter instance reference + * + * Calculate the pending I/Os for the controller and return. + * + * Return: Number of pending I/Os + */ +static inline int mpi3mr_get_fw_pending_ios(struct mpi3mr_ioc *mrioc) +{ + u16 i; + uint pend_ios = 0; + + for (i = 0; i < mrioc->num_op_reply_q; i++) + pend_ios += atomic_read(&mrioc->op_reply_qinfo[i].pend_ios); + return pend_ios; +} + +/** + * mpi3mr_print_pending_host_io - print pending I/Os + * @mrioc: Adapter instance reference + * + * Print number of pending I/Os and each I/O details prior to + * reset for debug purpose. + * + * Return: Nothing + */ +static void mpi3mr_print_pending_host_io(struct mpi3mr_ioc *mrioc) +{ + struct Scsi_Host *shost = mrioc->shost; + + ioc_info(mrioc, "%s :Pending commands prior to reset: %d\n", + __func__, mpi3mr_get_fw_pending_ios(mrioc)); + blk_mq_tagset_busy_iter(&shost->tag_set, + mpi3mr_print_scmd, (void *)mrioc); +} + /** * mpi3mr_eh_host_reset - Host reset error handling callback * @scmd: SCSI command reference @@ -2392,6 +2459,7 @@ static int mpi3mr_eh_host_reset(struct scsi_cmnd *scmd) dev_type = stgt_priv_data->dev_type; } + mpi3mr_print_pending_host_io(mrioc); ret = mpi3mr_soft_reset_handler(mrioc, MPI3MR_RESET_FROM_EH_HOS, 1); if (ret)