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scsi: smartpqi: switch to pci_alloc_irq_vectors

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Which cleans up a lot of the MSI-X handling, and allows us to use the
PCI IRQ layer provided vector mapping, which we can then expose to
blk-mq.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Acked-by: Don Brace <don.brace@microsemi.com>
Tested-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Christoph Hellwig 2016-11-01 08:12:49 -06:00 committed by Martin K. Petersen
parent 2d9c5c20c9
commit 5219822687
2 changed files with 32 additions and 72 deletions
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2
drivers/scsi/smartpqi/smartpqi.h
View File

@ -929,8 +929,6 @@ struct pqi_ctrl_info {
int max_msix_vectors;
int num_msix_vectors_enabled;
int num_msix_vectors_initialized;
u32 msix_vectors[PQI_MAX_MSIX_VECTORS];
void *intr_data[PQI_MAX_MSIX_VECTORS];
int event_irq;
struct Scsi_Host *scsi_host;

102
drivers/scsi/smartpqi/smartpqi_init.c
View File

@ -25,6 +25,7 @@
#include <linux/rtc.h>
#include <linux/bcd.h>
#include <linux/cciss_ioctl.h>
#include <linux/blk-mq-pci.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
@ -2887,19 +2888,19 @@ static irqreturn_t pqi_irq_handler(int irq, void *data)
static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info)
{
struct pci_dev *pdev = ctrl_info->pci_dev;
int i;
int rc;
ctrl_info->event_irq = ctrl_info->msix_vectors[0];
ctrl_info->event_irq = pci_irq_vector(pdev, 0);
for (i = 0; i < ctrl_info->num_msix_vectors_enabled; i++) {
rc = request_irq(ctrl_info->msix_vectors[i],
pqi_irq_handler, 0,
DRIVER_NAME_SHORT, ctrl_info->intr_data[i]);
rc = request_irq(pci_irq_vector(pdev, i), pqi_irq_handler, 0,
DRIVER_NAME_SHORT, &ctrl_info->queue_groups[i]);
if (rc) {
dev_err(&ctrl_info->pci_dev->dev,
dev_err(&pdev->dev,
"irq %u init failed with error %d\n",
ctrl_info->msix_vectors[i], rc);
pci_irq_vector(pdev, i), rc);
return rc;
}
ctrl_info->num_msix_vectors_initialized++;
@ -2908,72 +2909,23 @@ static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info)
return 0;
}
static void pqi_free_irqs(struct pqi_ctrl_info *ctrl_info)
{
int i;
for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
free_irq(ctrl_info->msix_vectors[i],
ctrl_info->intr_data[i]);
}
static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
{
unsigned int i;
int max_vectors;
int num_vectors_enabled;
struct msix_entry msix_entries[PQI_MAX_MSIX_VECTORS];
int ret;
max_vectors = ctrl_info->num_queue_groups;
for (i = 0; i < max_vectors; i++)
msix_entries[i].entry = i;
num_vectors_enabled = pci_enable_msix_range(ctrl_info->pci_dev,
msix_entries, PQI_MIN_MSIX_VECTORS, max_vectors);
if (num_vectors_enabled < 0) {
ret = pci_alloc_irq_vectors(ctrl_info->pci_dev,
PQI_MIN_MSIX_VECTORS, ctrl_info->num_queue_groups,
PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
if (ret < 0) {
dev_err(&ctrl_info->pci_dev->dev,
"MSI-X init failed with error %d\n",
num_vectors_enabled);
return num_vectors_enabled;
}
ctrl_info->num_msix_vectors_enabled = num_vectors_enabled;
for (i = 0; i < num_vectors_enabled; i++) {
ctrl_info->msix_vectors[i] = msix_entries[i].vector;
ctrl_info->intr_data[i] = &ctrl_info->queue_groups[i];
"MSI-X init failed with error %d\n", ret);
return ret;
}
ctrl_info->num_msix_vectors_enabled = ret;
return 0;
}
static void pqi_irq_set_affinity_hint(struct pqi_ctrl_info *ctrl_info)
{
int i;
int rc;
int cpu;
cpu = cpumask_first(cpu_online_mask);
for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++) {
rc = irq_set_affinity_hint(ctrl_info->msix_vectors[i],
get_cpu_mask(cpu));
if (rc)
dev_err(&ctrl_info->pci_dev->dev,
"error %d setting affinity hint for irq vector %u\n",
rc, ctrl_info->msix_vectors[i]);
cpu = cpumask_next(cpu, cpu_online_mask);
}
}
static void pqi_irq_unset_affinity_hint(struct pqi_ctrl_info *ctrl_info)
{
int i;
for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
irq_set_affinity_hint(ctrl_info->msix_vectors[i], NULL);
}
static int pqi_alloc_operational_queues(struct pqi_ctrl_info *ctrl_info)
{
unsigned int i;
@ -4743,6 +4695,13 @@ static int pqi_slave_configure(struct scsi_device *sdev)
return 0;
}
static int pqi_map_queues(struct Scsi_Host *shost)
{
struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
return blk_mq_pci_map_queues(&shost->tag_set, ctrl_info->pci_dev);
}
static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info,
void __user *arg)
{
@ -5130,6 +5089,7 @@ static struct scsi_host_template pqi_driver_template = {
.ioctl = pqi_ioctl,
.slave_alloc = pqi_slave_alloc,
.slave_configure = pqi_slave_configure,
.map_queues = pqi_map_queues,
.sdev_attrs = pqi_sdev_attrs,
.shost_attrs = pqi_shost_attrs,
};
@ -5159,7 +5119,7 @@ static int pqi_register_scsi(struct pqi_ctrl_info *ctrl_info)
shost->cmd_per_lun = shost->can_queue;
shost->sg_tablesize = ctrl_info->sg_tablesize;
shost->transportt = pqi_sas_transport_template;
shost->irq = ctrl_info->msix_vectors[0];
shost->irq = pci_irq_vector(ctrl_info->pci_dev, 0);
shost->unique_id = shost->irq;
shost->nr_hw_queues = ctrl_info->num_queue_groups;
shost->hostdata[0] = (unsigned long)ctrl_info;
@ -5409,8 +5369,6 @@ static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
if (rc)
return rc;
pqi_irq_set_affinity_hint(ctrl_info);
rc = pqi_create_queues(ctrl_info);
if (rc)
return rc;
@ -5557,10 +5515,14 @@ static inline void pqi_free_ctrl_info(struct pqi_ctrl_info *ctrl_info)
static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info)
{
pqi_irq_unset_affinity_hint(ctrl_info);
pqi_free_irqs(ctrl_info);
if (ctrl_info->num_msix_vectors_enabled)
pci_disable_msix(ctrl_info->pci_dev);
int i;
for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++) {
free_irq(pci_irq_vector(ctrl_info->pci_dev, i),
&ctrl_info->queue_groups[i]);
}
pci_free_irq_vectors(ctrl_info->pci_dev);
}
static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info)