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scsi: mpi3mr: Avoid reply queue full condition

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[ Upstream commit f08b24d82749117ce779cc66689e8594341130d3 ]

To avoid reply queue full condition, update the driver to check IOCFacts
capabilities for qfull.

Update the operational reply queue's Consumer Index after processing 100
replies. If pending I/Os on a reply queue exceeds a threshold
(reply_queue_depth - 200), then return I/O back to OS to retry.

Also increase default admin reply queue size to 2K.

Signed-off-by: Sumit Saxena <sumit.saxena@broadcom.com>
Signed-off-by: Ranjan Kumar <ranjan.kumar@broadcom.com>
Link: https://lore.kernel.org/r/20250129100850.25430-2-ranjan.kumar@broadcom.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ranjan Kumar
2025-01-29 15:38:47 +05:30
committed by Greg Kroah-Hartman
parent b1e0b4f494
commit 6a35449df8
3 changed files with 63 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

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

@@ -81,13 +81,14 @@ extern atomic64_t event_counter;
/* Admin queue management definitions */
#define MPI3MR_ADMIN_REQ_Q_SIZE (2 * MPI3MR_PAGE_SIZE_4K)
#define MPI3MR_ADMIN_REPLY_Q_SIZE (4 * MPI3MR_PAGE_SIZE_4K)
#define MPI3MR_ADMIN_REPLY_Q_SIZE (8 * MPI3MR_PAGE_SIZE_4K)
#define MPI3MR_ADMIN_REQ_FRAME_SZ 128
#define MPI3MR_ADMIN_REPLY_FRAME_SZ 16
/* Operational queue management definitions */
#define MPI3MR_OP_REQ_Q_QD 512
#define MPI3MR_OP_REP_Q_QD 1024
#define MPI3MR_OP_REP_Q_QD2K 2048
#define MPI3MR_OP_REP_Q_QD4K 4096
#define MPI3MR_OP_REQ_Q_SEG_SIZE 4096
#define MPI3MR_OP_REP_Q_SEG_SIZE 4096
@@ -329,6 +330,7 @@ enum mpi3mr_reset_reason {
#define MPI3MR_RESET_REASON_OSTYPE_SHIFT 28
#define MPI3MR_RESET_REASON_IOCNUM_SHIFT 20
/* Queue type definitions */
enum queue_type {
MPI3MR_DEFAULT_QUEUE = 0,
@@ -388,6 +390,7 @@ struct mpi3mr_ioc_facts {
u16 max_msix_vectors;
u8 personality;
u8 dma_mask;
bool max_req_limit;
u8 protocol_flags;
u8 sge_mod_mask;
u8 sge_mod_value;
@@ -457,6 +460,8 @@ struct op_req_qinfo {
* @enable_irq_poll: Flag to indicate polling is enabled
* @in_use: Queue is handled by poll/ISR
* @qtype: Type of queue (types defined in enum queue_type)
* @qfull_watermark: Watermark defined in reply queue to avoid
* reply queue full
*/
struct op_reply_qinfo {
u16 ci;
@@ -472,6 +477,7 @@ struct op_reply_qinfo {
bool enable_irq_poll;
atomic_t in_use;
enum queue_type qtype;
u16 qfull_watermark;
};
/**
@@ -1154,6 +1160,8 @@ struct scmd_priv {
* @snapdump_trigger_active: Snapdump trigger active flag
* @pci_err_recovery: PCI error recovery in progress
* @block_on_pci_err: Block IO during PCI error recovery
* @reply_qfull_count: Occurences of reply queue full avoidance kicking-in
* @prevent_reply_qfull: Enable reply queue prevention
*/
struct mpi3mr_ioc {
struct list_head list;
@@ -1352,6 +1360,8 @@ struct mpi3mr_ioc {
bool fw_release_trigger_active;
bool pci_err_recovery;
bool block_on_pci_err;
atomic_t reply_qfull_count;
bool prevent_reply_qfull;
};
/**

24
drivers/scsi/mpi3mr/mpi3mr_app.c
View File

@@ -3060,6 +3060,29 @@ reply_queue_count_show(struct device *dev, struct device_attribute *attr,
static DEVICE_ATTR_RO(reply_queue_count);
/**
* reply_qfull_count_show - Show reply qfull count
* @dev: class device
* @attr: Device attributes
* @buf: Buffer to copy
*
* Retrieves the current value of the reply_qfull_count from the mrioc structure and
* formats it as a string for display.
*
* Return: sysfs_emit() return
*/
static ssize_t
reply_qfull_count_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct Scsi_Host *shost = class_to_shost(dev);
struct mpi3mr_ioc *mrioc = shost_priv(shost);
return sysfs_emit(buf, "%u\n", atomic_read(&mrioc->reply_qfull_count));
}
static DEVICE_ATTR_RO(reply_qfull_count);
/**
* logging_level_show - Show controller debug level
* @dev: class device
@@ -3152,6 +3175,7 @@ static struct attribute *mpi3mr_host_attrs[] = {
&dev_attr_fw_queue_depth.attr,
&dev_attr_op_req_q_count.attr,
&dev_attr_reply_queue_count.attr,
&dev_attr_reply_qfull_count.attr,
&dev_attr_logging_level.attr,
&dev_attr_adp_state.attr,
NULL,

32
drivers/scsi/mpi3mr/mpi3mr_fw.c
View File

@@ -2104,15 +2104,22 @@ static int mpi3mr_create_op_reply_q(struct mpi3mr_ioc *mrioc, u16 qidx)
}
reply_qid = qidx + 1;
op_reply_q->num_replies = MPI3MR_OP_REP_Q_QD;
if ((mrioc->pdev->device == MPI3_MFGPAGE_DEVID_SAS4116) &&
!mrioc->pdev->revision)
op_reply_q->num_replies = MPI3MR_OP_REP_Q_QD4K;
if (mrioc->pdev->device == MPI3_MFGPAGE_DEVID_SAS4116) {
if (mrioc->pdev->revision)
op_reply_q->num_replies = MPI3MR_OP_REP_Q_QD;
else
op_reply_q->num_replies = MPI3MR_OP_REP_Q_QD4K;
} else
op_reply_q->num_replies = MPI3MR_OP_REP_Q_QD2K;
op_reply_q->ci = 0;
op_reply_q->ephase = 1;
atomic_set(&op_reply_q->pend_ios, 0);
atomic_set(&op_reply_q->in_use, 0);
op_reply_q->enable_irq_poll = false;
op_reply_q->qfull_watermark =
op_reply_q->num_replies - (MPI3MR_THRESHOLD_REPLY_COUNT * 2);
if (!op_reply_q->q_segments) {
retval = mpi3mr_alloc_op_reply_q_segments(mrioc, qidx);
@@ -2416,8 +2423,10 @@ int mpi3mr_op_request_post(struct mpi3mr_ioc *mrioc,
void *segment_base_addr;
u16 req_sz = mrioc->facts.op_req_sz;
struct segments *segments = op_req_q->q_segments;
struct op_reply_qinfo *op_reply_q = NULL;
reply_qidx = op_req_q->reply_qid - 1;
op_reply_q = mrioc->op_reply_qinfo + reply_qidx;
if (mrioc->unrecoverable)
return -EFAULT;
@@ -2448,6 +2457,15 @@ int mpi3mr_op_request_post(struct mpi3mr_ioc *mrioc,
goto out;
}
/* Reply queue is nearing to get full, push back IOs to SML */
if ((mrioc->prevent_reply_qfull == true) &&
(atomic_read(&op_reply_q->pend_ios) >
(op_reply_q->qfull_watermark))) {
atomic_inc(&mrioc->reply_qfull_count);
retval = -EAGAIN;
goto out;
}
segment_base_addr = segments[pi / op_req_q->segment_qd].segment;
req_entry = (u8 *)segment_base_addr +
((pi % op_req_q->segment_qd) * req_sz);
@@ -3091,6 +3109,9 @@ static void mpi3mr_process_factsdata(struct mpi3mr_ioc *mrioc,
mrioc->facts.dma_mask = (facts_flags &
MPI3_IOCFACTS_FLAGS_DMA_ADDRESS_WIDTH_MASK) >>
MPI3_IOCFACTS_FLAGS_DMA_ADDRESS_WIDTH_SHIFT;
mrioc->facts.dma_mask = (facts_flags &
MPI3_IOCFACTS_FLAGS_DMA_ADDRESS_WIDTH_MASK) >>
MPI3_IOCFACTS_FLAGS_DMA_ADDRESS_WIDTH_SHIFT;
mrioc->facts.protocol_flags = facts_data->protocol_flags;
mrioc->facts.mpi_version = le32_to_cpu(facts_data->mpi_version.word);
mrioc->facts.max_reqs = le16_to_cpu(facts_data->max_outstanding_requests);
@@ -4214,6 +4235,9 @@ retry_init:
mrioc->shost->transportt = mpi3mr_transport_template;
}
if (mrioc->facts.max_req_limit)
mrioc->prevent_reply_qfull = true;
mrioc->reply_sz = mrioc->facts.reply_sz;
retval = mpi3mr_check_reset_dma_mask(mrioc);