This patch converts over hpsa to use the pci_alloc_irq_vectors including
the PCI_IRQ_AFFINITY flag that automatically assigns spread out
irq affinity to the I/O queues.
It also cleans up the per-ctrl interrupt state due to the use of the
pci_irq_vector and pci_free_irq_vectors helpers that don't need to know
the exact irq type. Additionally it changes a little oddity in the
existing code that was using different array indixes into the per-vector
arrays depending on wether a controller is using a single INTx or single
MSI irq.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
drivers/scsi/hpsa.c | 143 ++++++++++++++++++----------------------------------
drivers/scsi/hpsa.h | 6 +--
2 files changed, 52 insertions(+), 97 deletions(-)
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index d007ec1..dce8f80 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -1001,7 +1001,7 @@ static void set_performant_mode(struct ctlr_info *h, struct CommandList *c,
{
if (likely(h->transMethod & CFGTBL_Trans_Performant)) {
c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
- if (unlikely(!h->msix_vector))
+ if (unlikely(!h->msix_vectors))
return;
if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
c->Header.ReplyQueue =
@@ -5618,7 +5618,7 @@ static int hpsa_scsi_host_alloc(struct ctlr_info *h)
sh->sg_tablesize = h->maxsgentries;
sh->transportt = hpsa_sas_transport_template;
sh->hostdata[0] = (unsigned long) h;
- sh->irq = h->intr[h->intr_mode];
+ sh->irq = pci_irq_vector(h->pdev, 0);
sh->unique_id = sh->irq;
h->scsi_host = sh;
@@ -7652,67 +7652,41 @@ static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
static void hpsa_disable_interrupt_mode(struct ctlr_info *h)
{
- if (h->msix_vector) {
- if (h->pdev->msix_enabled)
- pci_disable_msix(h->pdev);
- h->msix_vector = 0;
- } else if (h->msi_vector) {
- if (h->pdev->msi_enabled)
- pci_disable_msi(h->pdev);
- h->msi_vector = 0;
- }
+ pci_free_irq_vectors(h->pdev);
+ h->msix_vectors = 0;
}
/* If MSI/MSI-X is supported by the kernel we will try to enable it on
* controllers that are capable. If not, we use legacy INTx mode.
*/
-static void hpsa_interrupt_mode(struct ctlr_info *h)
+static int hpsa_interrupt_mode(struct ctlr_info *h)
{
-#ifdef CONFIG_PCI_MSI
- int err, i;
- struct msix_entry hpsa_msix_entries[MAX_REPLY_QUEUES];
-
- for (i = 0; i < MAX_REPLY_QUEUES; i++) {
- hpsa_msix_entries[i].vector = 0;
- hpsa_msix_entries[i].entry = i;
- }
+ unsigned int flags = PCI_IRQ_LEGACY;
+ int ret;
/* Some boards advertise MSI but don't really support it */
- if ((h->board_id == 0x40700E11) || (h->board_id == 0x40800E11) ||
- (h->board_id == 0x40820E11) || (h->board_id == 0x40830E11))
- goto default_int_mode;
- if (pci_find_capability(h->pdev, PCI_CAP_ID_MSIX)) {
- dev_info(&h->pdev->dev, "MSI-X capable controller\n");
- h->msix_vector = MAX_REPLY_QUEUES;
- if (h->msix_vector > num_online_cpus())
- h->msix_vector = num_online_cpus();
- err = pci_enable_msix_range(h->pdev, hpsa_msix_entries,
- 1, h->msix_vector);
- if (err < 0) {
- dev_warn(&h->pdev->dev, "MSI-X init failed %d\n", err);
- h->msix_vector = 0;
- goto single_msi_mode;
- } else if (err < h->msix_vector) {
- dev_warn(&h->pdev->dev, "only %d MSI-X vectors "
- "available\n", err);
+ switch (h->board_id) {
+ case 0x40700E11:
+ case 0x40800E11:
+ case 0x40820E11:
+ case 0x40830E11:
+ break;
+ default:
+ ret = pci_alloc_irq_vectors(h->pdev, 1, MAX_REPLY_QUEUES,
+ PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
+ if (ret > 0) {
+ h->msix_vectors = ret;
+ return 0;
}
- h->msix_vector = err;
- for (i = 0; i < h->msix_vector; i++)
- h->intr[i] = hpsa_msix_entries[i].vector;
- return;
- }
-single_msi_mode:
- if (pci_find_capability(h->pdev, PCI_CAP_ID_MSI)) {
- dev_info(&h->pdev->dev, "MSI capable controller\n");
- if (!pci_enable_msi(h->pdev))
- h->msi_vector = 1;
- else
- dev_warn(&h->pdev->dev, "MSI init failed\n");
+
+ flags |= PCI_IRQ_MSI;
+ break;
}
-default_int_mode:
-#endif /* CONFIG_PCI_MSI */
- /* if we get here we're going to use the default interrupt mode */
- h->intr[h->intr_mode] = h->pdev->irq;
+
+ ret = pci_alloc_irq_vectors(h->pdev, 1, 1, flags);
+ if (ret < 0)
+ return ret;
+ return 0;
}
static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
@@ -8068,7 +8042,9 @@ static int hpsa_pci_init(struct ctlr_info *h)
pci_set_master(h->pdev);
- hpsa_interrupt_mode(h);
+ err = hpsa_interrupt_mode(h);
+ if (err)
+ goto clean1;
err = hpsa_pci_find_memory_BAR(h->pdev, &h->paddr);
if (err)
goto clean2; /* intmode+region, pci */
@@ -8104,6 +8080,7 @@ static int hpsa_pci_init(struct ctlr_info *h)
h->vaddr = NULL;
clean2: /* intmode+region, pci */
hpsa_disable_interrupt_mode(h);
+clean1:
/*
* call pci_disable_device before pci_release_regions per
* Documentation/PCI/pci.txt
@@ -8237,34 +8214,20 @@ static int hpsa_alloc_cmd_pool(struct ctlr_info *h)
return -ENOMEM;
}
-static void hpsa_irq_affinity_hints(struct ctlr_info *h)
-{
- int i, cpu;
-
- cpu = cpumask_first(cpu_online_mask);
- for (i = 0; i < h->msix_vector; i++) {
- irq_set_affinity_hint(h->intr[i], get_cpu_mask(cpu));
- cpu = cpumask_next(cpu, cpu_online_mask);
- }
-}
-
/* clear affinity hints and free MSI-X, MSI, or legacy INTx vectors */
static void hpsa_free_irqs(struct ctlr_info *h)
{
int i;
- if (!h->msix_vector || h->intr_mode != PERF_MODE_INT) {
+ if (!h->msix_vectors || h->intr_mode != PERF_MODE_INT) {
/* Single reply queue, only one irq to free */
- i = h->intr_mode;
- irq_set_affinity_hint(h->intr[i], NULL);
- free_irq(h->intr[i], &h->q[i]);
- h->q[i] = 0;
+ free_irq(pci_irq_vector(h->pdev, 0), &h->q[i]);
+ h->q[h->intr_mode] = 0;
return;
}
- for (i = 0; i < h->msix_vector; i++) {
- irq_set_affinity_hint(h->intr[i], NULL);
- free_irq(h->intr[i], &h->q[i]);
+ for (i = 0; i < h->msix_vectors; i++) {
+ free_irq(pci_irq_vector(h->pdev, i), &h->q[i]);
h->q[i] = 0;
}
for (; i < MAX_REPLY_QUEUES; i++)
@@ -8285,11 +8248,11 @@ static int hpsa_request_irqs(struct ctlr_info *h,
for (i = 0; i < MAX_REPLY_QUEUES; i++)
h->q[i] = (u8) i;
- if (h->intr_mode == PERF_MODE_INT && h->msix_vector > 0) {
+ if (h->intr_mode == PERF_MODE_INT && h->msix_vectors > 0) {
/* If performant mode and MSI-X, use multiple reply queues */
- for (i = 0; i < h->msix_vector; i++) {
+ for (i = 0; i < h->msix_vectors; i++) {
sprintf(h->intrname[i], "%s-msix%d", h->devname, i);
- rc = request_irq(h->intr[i], msixhandler,
+ rc = request_irq(pci_irq_vector(h->pdev, i), msixhandler,
0, h->intrname[i],
&h->q[i]);
if (rc) {
@@ -8297,9 +8260,9 @@ static int hpsa_request_irqs(struct ctlr_info *h,
dev_err(&h->pdev->dev,
"failed to get irq %d for %s\n",
- h->intr[i], h->devname);
+ pci_irq_vector(h->pdev, i), h->devname);
for (j = 0; j < i; j++) {
- free_irq(h->intr[j], &h->q[j]);
+ free_irq(pci_irq_vector(h->pdev, j), &h->q[j]);
h->q[j] = 0;
}
for (; j < MAX_REPLY_QUEUES; j++)
@@ -8307,33 +8270,27 @@ static int hpsa_request_irqs(struct ctlr_info *h,
return rc;
}
}
- hpsa_irq_affinity_hints(h);
} else {
/* Use single reply pool */
- if (h->msix_vector > 0 || h->msi_vector) {
- if (h->msix_vector)
- sprintf(h->intrname[h->intr_mode],
- "%s-msix", h->devname);
- else
- sprintf(h->intrname[h->intr_mode],
- "%s-msi", h->devname);
- rc = request_irq(h->intr[h->intr_mode],
+ if (h->msix_vectors > 0 || h->pdev->msi_enabled) {
+ sprintf(h->intrname[0], "%s-msi%s", h->devname,
+ h->msix_vectors ? "x" : "");
+ rc = request_irq(pci_irq_vector(h->pdev, 0),
msixhandler, 0,
- h->intrname[h->intr_mode],
+ h->intrname[0],
&h->q[h->intr_mode]);
} else {
sprintf(h->intrname[h->intr_mode],
"%s-intx", h->devname);
- rc = request_irq(h->intr[h->intr_mode],
+ rc = request_irq(pci_irq_vector(h->pdev, 0),
intxhandler, IRQF_SHARED,
- h->intrname[h->intr_mode],
+ h->intrname[0],
&h->q[h->intr_mode]);
}
- irq_set_affinity_hint(h->intr[h->intr_mode], NULL);
}
if (rc) {
dev_err(&h->pdev->dev, "failed to get irq %d for %s\n",
- h->intr[h->intr_mode], h->devname);
+ pci_irq_vector(h->pdev, 0), h->devname);
hpsa_free_irqs(h);
return -ENODEV;
}
@@ -9519,7 +9476,7 @@ static int hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h)
return rc;
}
- h->nreply_queues = h->msix_vector > 0 ? h->msix_vector : 1;
+ h->nreply_queues = h->msix_vectors > 0 ? h->msix_vectors : 1;
hpsa_get_max_perf_mode_cmds(h);
/* Performant mode ring buffer and supporting data structures */
h->reply_queue_size = h->max_commands * sizeof(u64);
diff --git a/drivers/scsi/hpsa.h b/drivers/scsi/hpsa.h
index 82cdfad..3faf6cf 100644
--- a/drivers/scsi/hpsa.h
+++ b/drivers/scsi/hpsa.h
@@ -175,9 +175,7 @@ struct ctlr_info {
# define DOORBELL_INT 1
# define SIMPLE_MODE_INT 2
# define MEMQ_MODE_INT 3
- unsigned int intr[MAX_REPLY_QUEUES];
- unsigned int msix_vector;
- unsigned int msi_vector;
+ unsigned int msix_vectors;
int intr_mode; /* either PERF_MODE_INT or SIMPLE_MODE_INT */
struct access_method access;
@@ -464,7 +462,7 @@ static unsigned long SA5_performant_completed(struct ctlr_info *h, u8 q)
unsigned long register_value = FIFO_EMPTY;
/* msi auto clears the interrupt pending bit. */
- if (unlikely(!(h->msi_vector || h->msix_vector))) {
+ if (unlikely(!(h->pdev->msi_enabled || h->msix_vectors))) {
/* flush the controller write of the reply queue by reading
* outbound doorbell status register.
*/
--
2.1.4
--
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