[PATCH v2 19/24] mpi3mr: print pending host ios for debug

Kashyap Desai
2021-04-07T02:05:04Z

[-- Attachment #1: Type: text/plain, Size: 2775 bytes --]

Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Cc: sathya.prakash@broadcom.com
---
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)
--
2.18.1