diff options
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/msi.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 06100dde0e86..9da5ecb41f0b 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -1270,6 +1270,37 @@ int pci_irq_vector(struct pci_dev *dev, unsigned int nr) } EXPORT_SYMBOL(pci_irq_vector); +/** + * pci_irq_get_affinity - return the affinity of a particular msi vector + * @dev: PCI device to operate on + * @nr: device-relative interrupt vector index (0-based). + */ +const struct cpumask *pci_irq_get_affinity(struct pci_dev *dev, int nr) +{ + if (dev->msix_enabled) { + struct msi_desc *entry; + int i = 0; + + for_each_pci_msi_entry(entry, dev) { + if (i == nr) + return entry->affinity; + i++; + } + WARN_ON_ONCE(1); + return NULL; + } else if (dev->msi_enabled) { + struct msi_desc *entry = first_pci_msi_entry(dev); + + if (WARN_ON_ONCE(!entry || nr >= entry->nvec_used)) + return NULL; + + return &entry->affinity[nr]; + } else { + return cpu_possible_mask; + } +} +EXPORT_SYMBOL(pci_irq_get_affinity); + struct pci_dev *msi_desc_to_pci_dev(struct msi_desc *desc) { return to_pci_dev(desc->dev); |