github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-31 02:24:24 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

scsi: mpi3mr: Add queue-full tracking for operational request queues

Browse Source 
Track queue-full conditions on operational request queues in the driver.
Record the last host tag returned to the SCSI mid-layer and count I/Os
affected by queue-full conditions.

Signed-off-by: Ranjan Kumar <ranjan.kumar@broadcom.com>
Link: https://patch.msgid.link/20260320090326.47544-3-ranjan.kumar@broadcom.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Ranjan Kumar 2026-03-20 14:33:25 +05:30 committed by Martin K. Petersen
parent 31693fbbfa
commit 9d660e4820
2 changed files with 28 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/scsi/mpi3mr/mpi3mr.h
View File

@ -429,6 +429,14 @@ struct segments {
* @q_segments: Segment descriptor pointer
* @q_segment_list: Segment list base virtual address
* @q_segment_list_dma: Segment list base DMA address
* @last_full_host_tag: Hosttag of last IO returned to SML
* due to queue full
* @qfull_io_count: Number of IOs returned back to SML
* due to queue full
* @qfull_instances: Total queue full occurrences.One occurrence
* starts with queue full detection and ends
* with queue full breaks.
*
*/
struct op_req_qinfo {
u16 ci;
@ -442,6 +450,10 @@ struct op_req_qinfo {
struct segments *q_segments;
void *q_segment_list;
dma_addr_t q_segment_list_dma;
u16 last_full_host_tag;
u64 qfull_io_count;
u32 qfull_instances;
};
/**

16
drivers/scsi/mpi3mr/mpi3mr_fw.c
View File

@ -2362,6 +2362,9 @@ static int mpi3mr_create_op_req_q(struct mpi3mr_ioc *mrioc, u16 idx,
op_req_q->ci = 0;
op_req_q->pi = 0;
op_req_q->reply_qid = reply_qid;
op_req_q->last_full_host_tag = MPI3MR_HOSTTAG_INVALID;
op_req_q->qfull_io_count = 0;
op_req_q->qfull_instances = 0;
spin_lock_init(&op_req_q->q_lock);
if (!op_req_q->q_segments) {
@ -2548,6 +2551,8 @@ int mpi3mr_op_request_post(struct mpi3mr_ioc *mrioc,
u16 req_sz = mrioc->facts.op_req_sz;
struct segments *segments = op_req_q->q_segments;
struct op_reply_qinfo *op_reply_q = NULL;
struct mpi3_scsi_io_request *scsiio_req =
(struct mpi3_scsi_io_request *)req;
reply_qidx = op_req_q->reply_qid - 1;
op_reply_q = mrioc->op_reply_qinfo + reply_qidx;
@ -2565,11 +2570,21 @@ int mpi3mr_op_request_post(struct mpi3mr_ioc *mrioc,
mpi3mr_process_op_reply_q(mrioc, mrioc->intr_info[midx].op_reply_q);
if (mpi3mr_check_req_qfull(op_req_q)) {
if (op_req_q->last_full_host_tag ==
MPI3MR_HOSTTAG_INVALID)
op_req_q->qfull_instances++;
op_req_q->last_full_host_tag = scsiio_req->host_tag;
op_req_q->qfull_io_count++;
retval = -EAGAIN;
goto out;
}
}
if (op_req_q->last_full_host_tag != MPI3MR_HOSTTAG_INVALID)
op_req_q->last_full_host_tag = MPI3MR_HOSTTAG_INVALID;
if (mrioc->reset_in_progress) {
ioc_err(mrioc, "OpReqQ submit reset in progress\n");
retval = -EAGAIN;
@ -4827,6 +4842,7 @@ void mpi3mr_memset_buffers(struct mpi3mr_ioc *mrioc)
mrioc->req_qinfo[i].qid = 0;
mrioc->req_qinfo[i].reply_qid = 0;
spin_lock_init(&mrioc->req_qinfo[i].q_lock);
mrioc->req_qinfo[i].last_full_host_tag = 0;
mpi3mr_memset_op_req_q_buffers(mrioc, i);
}