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PCI/MSI: Propagate IRQ affinity description through the MSI code

Browse Source 
No API change yet, just pass it down all the way from
pci_alloc_irq_vectors() to the core MSI code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Link: http://lkml.kernel.org/r/1478654107-7384-5-git-send-email-hch@lst.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Christoph Hellwig 2016-11-08 17:15:04 -08:00 committed by Thomas Gleixner
parent 67c93c218d
commit 61e1c59052
1 changed files with 33 additions and 33 deletions
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66
drivers/pci/msi.c
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@ -551,15 +551,14 @@ static int populate_msi_sysfs(struct pci_dev *pdev)
}
static struct msi_desc *
msi_setup_entry(struct pci_dev *dev, int nvec, bool affinity)
msi_setup_entry(struct pci_dev *dev, int nvec, const struct irq_affinity *affd)
{
static const struct irq_affinity default_affd;
struct cpumask *masks = NULL;
struct msi_desc *entry;
u16 control;
if (affinity) {
masks = irq_create_affinity_masks(nvec, &default_affd);
if (affd) {
masks = irq_create_affinity_masks(nvec, affd);
if (!masks)
pr_err("Unable to allocate affinity masks, ignoring\n");
}
@ -619,7 +618,8 @@ static int msi_verify_entries(struct pci_dev *dev)
* an error, and a positive return value indicates the number of interrupts
* which could have been allocated.
*/
static int msi_capability_init(struct pci_dev *dev, int nvec, bool affinity)
static int msi_capability_init(struct pci_dev *dev, int nvec,
const struct irq_affinity *affd)
{
struct msi_desc *entry;
int ret;
@ -627,7 +627,7 @@ static int msi_capability_init(struct pci_dev *dev, int nvec, bool affinity)
pci_msi_set_enable(dev, 0); /* Disable MSI during set up */
entry = msi_setup_entry(dev, nvec, affinity);
entry = msi_setup_entry(dev, nvec, affd);
if (!entry)
return -ENOMEM;
@ -691,15 +691,14 @@ static void __iomem *msix_map_region(struct pci_dev *dev, unsigned nr_entries)
static int msix_setup_entries(struct pci_dev *dev, void __iomem *base,
struct msix_entry *entries, int nvec,
bool affinity)
const struct irq_affinity *affd)
{
static const struct irq_affinity default_affd;
struct cpumask *curmsk, *masks = NULL;
struct msi_desc *entry;
int ret, i;
if (affinity) {
masks = irq_create_affinity_masks(nvec, &default_affd);
if (affd) {
masks = irq_create_affinity_masks(nvec, affd);
if (!masks)
pr_err("Unable to allocate affinity masks, ignoring\n");
}
@ -755,14 +754,14 @@ static void msix_program_entries(struct pci_dev *dev,
* @dev: pointer to the pci_dev data structure of MSI-X device function
* @entries: pointer to an array of struct msix_entry entries
* @nvec: number of @entries
* @affinity: flag to indicate cpu irq affinity mask should be set
* @affd: Optional pointer to enable automatic affinity assignement
*
* Setup the MSI-X capability structure of device function with a
* single MSI-X irq. A return of zero indicates the successful setup of
* requested MSI-X entries with allocated irqs or non-zero for otherwise.
**/
static int msix_capability_init(struct pci_dev *dev, struct msix_entry *entries,
int nvec, bool affinity)
int nvec, const struct irq_affinity *affd)
{
int ret;
u16 control;
@ -777,7 +776,7 @@ static int msix_capability_init(struct pci_dev *dev, struct msix_entry *entries,
if (!base)
return -ENOMEM;
ret = msix_setup_entries(dev, base, entries, nvec, affinity);
ret = msix_setup_entries(dev, base, entries, nvec, affd);
if (ret)
return ret;
@ -958,7 +957,7 @@ int pci_msix_vec_count(struct pci_dev *dev)
EXPORT_SYMBOL(pci_msix_vec_count);
static int __pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries,
int nvec, bool affinity)
int nvec, const struct irq_affinity *affd)
{
int nr_entries;
int i, j;
@ -990,7 +989,7 @@ static int __pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries,
dev_info(&dev->dev, "can't enable MSI-X (MSI IRQ already assigned)\n");
return -EINVAL;
}
return msix_capability_init(dev, entries, nvec, affinity);
return msix_capability_init(dev, entries, nvec, affd);
}
/**
@ -1010,7 +1009,7 @@ static int __pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries,
**/
int pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, int nvec)
{
return __pci_enable_msix(dev, entries, nvec, false);
return __pci_enable_msix(dev, entries, nvec, NULL);
}
EXPORT_SYMBOL(pci_enable_msix);
@ -1061,10 +1060,8 @@ int pci_msi_enabled(void)
EXPORT_SYMBOL(pci_msi_enabled);
static int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec,
unsigned int flags)
const struct irq_affinity *affd)
{
static const struct irq_affinity default_affd;
bool affinity = flags & PCI_IRQ_AFFINITY;
int nvec;
int rc;
@ -1093,13 +1090,13 @@ static int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec,
nvec = maxvec;
for (;;) {
if (affinity) {
nvec = irq_calc_affinity_vectors(nvec, &default_affd);
if (affd) {
nvec = irq_calc_affinity_vectors(nvec, affd);
if (nvec < minvec)
return -ENOSPC;
}
rc = msi_capability_init(dev, nvec, affinity);
rc = msi_capability_init(dev, nvec, affd);
if (rc == 0)
return nvec;
@ -1126,29 +1123,27 @@ static int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec,
**/
int pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec)
{
return __pci_enable_msi_range(dev, minvec, maxvec, 0);
return __pci_enable_msi_range(dev, minvec, maxvec, NULL);
}
EXPORT_SYMBOL(pci_enable_msi_range);
static int __pci_enable_msix_range(struct pci_dev *dev,
struct msix_entry *entries, int minvec, int maxvec,
unsigned int flags)
struct msix_entry *entries, int minvec,
int maxvec, const struct irq_affinity *affd)
{
static const struct irq_affinity default_affd;
bool affinity = flags & PCI_IRQ_AFFINITY;
int rc, nvec = maxvec;
if (maxvec < minvec)
return -ERANGE;
for (;;) {
if (affinity) {
nvec = irq_calc_affinity_vectors(nvec, &default_affd);
if (affd) {
nvec = irq_calc_affinity_vectors(nvec, affd);
if (nvec < minvec)
return -ENOSPC;
}
rc = __pci_enable_msix(dev, entries, nvec, affinity);
rc = __pci_enable_msix(dev, entries, nvec, affd);
if (rc == 0)
return nvec;
@ -1179,7 +1174,7 @@ static int __pci_enable_msix_range(struct pci_dev *dev,
int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
int minvec, int maxvec)
{
return __pci_enable_msix_range(dev, entries, minvec, maxvec, 0);
return __pci_enable_msix_range(dev, entries, minvec, maxvec, NULL);
}
EXPORT_SYMBOL(pci_enable_msix_range);
@ -1203,17 +1198,22 @@ EXPORT_SYMBOL(pci_enable_msix_range);
int pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
unsigned int max_vecs, unsigned int flags)
{
static const struct irq_affinity msi_default_affd;
const struct irq_affinity *affd = NULL;
int vecs = -ENOSPC;
if (flags & PCI_IRQ_AFFINITY)
affd = &msi_default_affd;
if (flags & PCI_IRQ_MSIX) {
vecs = __pci_enable_msix_range(dev, NULL, min_vecs, max_vecs,
flags);
affd);
if (vecs > 0)
return vecs;
}
if (flags & PCI_IRQ_MSI) {
vecs = __pci_enable_msi_range(dev, min_vecs, max_vecs, flags);
vecs = __pci_enable_msi_range(dev, min_vecs, max_vecs, affd);
if (vecs > 0)
return vecs;
}