Commit 71e80106 authored by Kashyap Desai's avatar Kashyap Desai Committed by Martin K. Petersen
Browse files

scsi: mpi3mr: Print pending host I/Os for debugging 

Link: https://lore.kernel.org/r/20210520152545.2710479-20-kashyap.desai@broadcom.com


Cc: sathya.prakash@broadcom.com
Reviewed-by: default avatarTomas Henzl <thenzl@redhat.com>
Reviewed-by: default avatarHannes Reinecke <hare@suse.de>
Reviewed-by: default avatarHimanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: default avatarKashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent f061178e

drivers/scsi/mpi3mr/mpi3mr_os.c

+69 −0
Original line number Diff line number Diff line
@@ -333,6 +333,37 @@ void mpi3mr_invalidate_devhandles(struct mpi3mr_ioc *mrioc) 
	}

}



/**

 * mpi3mr_print_scmd - print individual SCSI command

 * @rq: Block request

 * @data: Adapter instance reference

 * @reserved: N/A. Currently not used

 *

 * 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

 * @rq: Block request
@@ -2341,6 +2372,43 @@ 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
@@ -2357,6 +2425,7 @@ static int mpi3mr_eh_host_reset(struct scsi_cmnd *scmd) 
	struct mpi3mr_ioc *mrioc = shost_priv(scmd->device->host);

	int retval = FAILED, ret;



	mpi3mr_print_pending_host_io(mrioc);

	ret = mpi3mr_soft_reset_handler(mrioc,

	    MPI3MR_RESET_FROM_EH_HOS, 1);

	if (ret)