> On Apr 19, 2021, at 6:01 AM, Kashyap Desai <kashyap.desai@xxxxxxxxxxxx> wrote:
>
> Signed-off-by: Kashyap Desai <kashyap.desai@xxxxxxxxxxxx>
> Reviewed-by: Tomas Henzl <thenzl@xxxxxxxxxx>
> Reviewed-by: Hannes Reinecke <hare@xxxxxxx>
> Cc: sathya.prakash@xxxxxxxxxxxx
> ---
> drivers/scsi/mpi3mr/mpi3mr_os.c | 69 +++++++++++++++++++++++++++++++++
> 1 file changed, 69 insertions(+)
>
> diff --git a/drivers/scsi/mpi3mr/mpi3mr_os.c b/drivers/scsi/mpi3mr/mpi3mr_os.c
> index 01b82bd2e8df..56f1e59e86cc 100644
> --- a/drivers/scsi/mpi3mr/mpi3mr_os.c
> +++ b/drivers/scsi/mpi3mr/mpi3mr_os.c
> @@ -334,6 +334,37 @@ 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
> @@ -2367,6 +2398,43 @@ 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
> @@ -2384,6 +2452,7 @@ static int mpi3mr_eh_host_reset(struct scsi_cmnd *scmd)
> int retval = FAILED, ret;
>
>
> + mpi3mr_print_pending_host_io(mrioc);
> ret = mpi3mr_soft_reset_handler(mrioc,
> MPI3MR_RESET_FROM_EH_HOS, 1);
> if (ret)
> --
> 2.18.1
>
Reviewed-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
--
Himanshu Madhani Oracle Linux Engineering
