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| author | Christoph Hellwig <hch@lst.de> | 2016-07-12 18:20:18 +0900 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2016-07-21 15:57:03 -0500 |
| commit | 4ef33685aa0957d771e068b60a5f3ca6b47ade1c (patch) | |
| tree | 34e9fee3bd177657e18f56a4d5d0701f6f3c20f5 /include/linux/pci.h | |
| parent | aff171641d181ea573380efc3f559c9de4741fc5 (diff) | |
| download | linux-4ef33685aa0957d771e068b60a5f3ca6b47ade1c.tar.gz linux-4ef33685aa0957d771e068b60a5f3ca6b47ade1c.tar.bz2 linux-4ef33685aa0957d771e068b60a5f3ca6b47ade1c.zip | |
PCI: Spread interrupt vectors in pci_alloc_irq_vectors()
Set the affinity_mask in the PCI device before allocating vectors so that
the affinity can be propagated through the MSI descriptor structures to the
core IRQ code. To facilitate this, new __pci_enable_msi_range() and
__pci_enable_msix_range() helpers are factored out of their not prefixed
variants which assigning the new IRQ affinity mask in the PCI device so
that the low-level interrupt code can perform the interrupt affinity
assignment and do node-local allocations.
A new PCI_IRQ_NOAFFINITY flag is added to pci_alloc_irq_vectors() so that
this function can also be used by drivers that don't wish to use the
automatic affinity assignment.
[bhelgaas: omit "else" after "return" consistently]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alexander Gordeev <agordeev@redhat.com>
Diffstat (limited to 'include/linux/pci.h')
| -rw-r--r-- | include/linux/pci.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h index 52ecd49e8049..f1406619f868 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -320,6 +320,7 @@ struct pci_dev { * directly, use the values stored here. They might be different! */ unsigned int irq; + struct cpumask *irq_affinity; struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */ bool match_driver; /* Skip attaching driver */ @@ -1240,6 +1241,7 @@ int pci_set_vga_state(struct pci_dev *pdev, bool decode, #define PCI_IRQ_NOLEGACY (1 << 0) /* don't use legacy interrupts */ #define PCI_IRQ_NOMSI (1 << 1) /* don't use MSI interrupts */ #define PCI_IRQ_NOMSIX (1 << 2) /* don't use MSI-X interrupts */ +#define PCI_IRQ_NOAFFINITY (1 << 3) /* don't auto-assign affinity */ /* kmem_cache style wrapper around pci_alloc_consistent() */ |