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scsi: qla2xxx: Fix Target mode handling with Multiqueue changes. 

- Fix race condition between dpc_thread accessing Multiqueue resources
  and qla2x00_remove_one thread trying to free resource.
- Fix out of order free for Multiqueue resources. Also, Multiqueue
  interrupts needs a workqueue. Interrupt needed to stop before
  the wq can be destroyed.

Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Quinn Tran 2016-12-12 14:40:09 -08:00 committed by Martin K. Petersen
parent 5601236b6f
commit 093df73771
4 changed files with 50 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/scsi/qla2xxx/qla_def.h
View File

@ -2734,7 +2734,8 @@ struct isp_operations {
#define QLA_MSIX_DEFAULT 0x00
#define QLA_MSIX_RSP_Q 0x01
#define QLA_MSIX_QPAIR_MULTIQ_RSP_Q 0x02
#define QLA_ATIO_VECTOR 0x02
#define QLA_MSIX_QPAIR_MULTIQ_RSP_Q 0x03
#define QLA_MIDX_DEFAULT 0
#define QLA_MIDX_RSP_Q 1

2
drivers/scsi/qla2xxx/qla_init.c
View File

@ -6764,7 +6764,7 @@ struct qla_qpair *qla2xxx_create_qpair(struct scsi_qla_host *vha, int qos, int v
qpair->vp_idx = vp_idx;
for (i = 0; i < ha->msix_count; i++) {
msix = &ha->msix_entries[i + 2];
msix = &ha->msix_entries[i];
if (msix->in_use)
continue;
qpair->msix = msix;

20
drivers/scsi/qla2xxx/qla_isr.c
View File

@ -3005,6 +3005,7 @@ struct qla_init_msix_entry {
static struct qla_init_msix_entry msix_entries[] = {
{ "qla2xxx (default)", qla24xx_msix_default },
{ "qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
{ "qla2xxx (atio_q)", qla83xx_msix_atio_q },
{ "qla2xxx (qpair_multiq)", qla2xxx_msix_rsp_q },
};
@ -3013,17 +3014,10 @@ static struct qla_init_msix_entry qla82xx_msix_entries[] = {
{ "qla2xxx (rsp_q)", qla82xx_msix_rsp_q },
};
static struct qla_init_msix_entry qla83xx_msix_entries[] = {
{ "qla2xxx (default)", qla24xx_msix_default },
{ "qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
{ "qla2xxx (atio_q)", qla83xx_msix_atio_q },
};
static int
qla24xx_enable_msix(struct qla_hw_data *ha, struct rsp_que *rsp)
{
#define MIN_MSIX_COUNT 2
#define ATIO_VECTOR 2
int i, ret;
struct qla_msix_entry *qentry;
scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
@ -3080,7 +3074,7 @@ qla24xx_enable_msix(struct qla_hw_data *ha, struct rsp_que *rsp)
}
/* Enable MSI-X vectors for the base queue */
for (i = 0; i < 2; i++) {
for (i = 0; i < (QLA_MSIX_RSP_Q + 1); i++) {
qentry = &ha->msix_entries[i];
qentry->handle = rsp;
rsp->msix = qentry;
@ -3097,6 +3091,7 @@ qla24xx_enable_msix(struct qla_hw_data *ha, struct rsp_que *rsp)
if (ret)
goto msix_register_fail;
qentry->have_irq = 1;
qentry->in_use = 1;
/* Register for CPU affinity notification. */
irq_set_affinity_notifier(qentry->vector, &qentry->irq_notify);
@ -3116,14 +3111,15 @@ qla24xx_enable_msix(struct qla_hw_data *ha, struct rsp_que *rsp)
* queue.
*/
if (QLA_TGT_MODE_ENABLED() && IS_ATIO_MSIX_CAPABLE(ha)) {
qentry = &ha->msix_entries[ATIO_VECTOR];
qentry = &ha->msix_entries[QLA_ATIO_VECTOR];
rsp->msix = qentry;
qentry->handle = rsp;
scnprintf(qentry->name, sizeof(qentry->name),
qla83xx_msix_entries[ATIO_VECTOR].name);
msix_entries[QLA_ATIO_VECTOR].name);
qentry->in_use = 1;
ret = request_irq(qentry->vector,
qla83xx_msix_entries[ATIO_VECTOR].handler,
0, qla83xx_msix_entries[ATIO_VECTOR].name, rsp);
msix_entries[QLA_ATIO_VECTOR].handler,
0, msix_entries[QLA_ATIO_VECTOR].name, rsp);
qentry->have_irq = 1;
}

53
drivers/scsi/qla2xxx/qla_os.c
View File

@ -439,24 +439,41 @@ static void qla2x00_free_queues(struct qla_hw_data *ha)
struct req_que *req;
struct rsp_que *rsp;
int cnt;
unsigned long flags;
spin_lock_irqsave(&ha->hardware_lock, flags);
for (cnt = 0; cnt < ha->max_req_queues; cnt++) {
if (!test_bit(cnt, ha->req_qid_map))
continue;
req = ha->req_q_map[cnt];
clear_bit(cnt, ha->req_qid_map);
ha->req_q_map[cnt] = NULL;
spin_unlock_irqrestore(&ha->hardware_lock, flags);
qla2x00_free_req_que(ha, req);
spin_lock_irqsave(&ha->hardware_lock, flags);
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
kfree(ha->req_q_map);
ha->req_q_map = NULL;
spin_lock_irqsave(&ha->hardware_lock, flags);
for (cnt = 0; cnt < ha->max_rsp_queues; cnt++) {
if (!test_bit(cnt, ha->rsp_qid_map))
continue;
rsp = ha->rsp_q_map[cnt];
clear_bit(cnt, ha->req_qid_map);
ha->rsp_q_map[cnt] = NULL;
spin_unlock_irqrestore(&ha->hardware_lock, flags);
qla2x00_free_rsp_que(ha, rsp);
spin_lock_irqsave(&ha->hardware_lock, flags);
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
kfree(ha->rsp_q_map);
ha->rsp_q_map = NULL;
}
@ -1890,17 +1907,22 @@ qla83xx_iospace_config(struct qla_hw_data *ha)
pci_read_config_word(ha->pdev,
QLA_83XX_PCI_MSIX_CONTROL, &msix);
ha->msix_count = msix + 1;
/* Max queues are bounded by available msix vectors */
/* queue 0 uses two msix vectors */
/*
* By default, driver uses at least two msix vectors
* (default & rspq)
*/
if (ql2xmqsupport) {
/* MB interrupt uses 1 vector */
ha->max_req_queues = ha->msix_count - 1;
ha->max_rsp_queues = ha->max_req_queues;
/* ATIOQ needs 1 vector. That's 1 less QPair */
if (QLA_TGT_MODE_ENABLED())
ha->max_req_queues--;
/* Queue pairs is the max value minus
* the base queue pair */
ha->max_qpairs = ha->max_req_queues - 1;
ql_dbg_pci(ql_dbg_multiq, ha->pdev, 0xc010,
"Max no of queues pairs: %d.\n", ha->max_qpairs);
ql_dbg_pci(ql_dbg_init, ha->pdev, 0x0190,
"Max no of queues pairs: %d.\n", ha->max_qpairs);
}
@ -1912,6 +1934,8 @@ qla83xx_iospace_config(struct qla_hw_data *ha)
mqiobase_exit:
ha->msix_count = ha->max_rsp_queues + 1;
if (QLA_TGT_MODE_ENABLED())
ha->msix_count++;
qlt_83xx_iospace_config(ha);
@ -2989,7 +3013,7 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
host->can_queue, base_vha->req,
base_vha->mgmt_svr_loop_id, host->sg_tablesize);
if (ha->mqenable) {
if (ha->mqenable && qla_ini_mode_enabled(base_vha)) {
ha->wq = alloc_workqueue("qla2xxx_wq", WQ_MEM_RECLAIM, 1);
/* Create start of day qpairs for Block MQ */
if (shost_use_blk_mq(host)) {
@ -3263,13 +3287,6 @@ qla2x00_delete_all_vps(struct qla_hw_data *ha, scsi_qla_host_t *base_vha)
static void
qla2x00_destroy_deferred_work(struct qla_hw_data *ha)
{
/* Flush the work queue and remove it */
if (ha->wq) {
flush_workqueue(ha->wq);
destroy_workqueue(ha->wq);
ha->wq = NULL;
}
/* Cancel all work and destroy DPC workqueues */
if (ha->dpc_lp_wq) {
cancel_work_sync(&ha->idc_aen);
@ -3465,9 +3482,17 @@ qla2x00_free_device(scsi_qla_host_t *vha)
ha->isp_ops->disable_intrs(ha);
}
qla2x00_free_fcports(vha);
qla2x00_free_irqs(vha);
qla2x00_free_fcports(vha);
/* Flush the work queue and remove it */
if (ha->wq) {
flush_workqueue(ha->wq);
destroy_workqueue(ha->wq);
ha->wq = NULL;
}
qla2x00_mem_free(ha);
@ -5187,8 +5212,8 @@ qla2x00_disable_board_on_pci_error(struct work_struct *work)
base_vha->flags.init_done = 0;
qla25xx_delete_queues(base_vha);
qla2x00_free_irqs(base_vha);
qla2x00_free_fcports(base_vha);
qla2x00_free_irqs(base_vha);
qla2x00_mem_free(ha);
qla82xx_md_free(base_vha);
qla2x00_free_queues(ha);