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genirq/msi: Add cpumask allocation to alloc_msi_entry

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For irq spreading want to store affinity masks in the msi_entry. Add the
infrastructure for it.

We allocate an array of cpumasks with an array size of the number of used
vectors in the entry, so we can hand in the information per linux interrupt
later.

As we hand in the number of used vectors, we assign them right
away. Convert all the call sites.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: axboe@fb.com
Cc: keith.busch@intel.com
Cc: agordeev@redhat.com
Cc: linux-block@vger.kernel.org
Cc: Christoph Hellwig <hch@lst.de>
Link: http://lkml.kernel.org/r/1473862739-15032-2-git-send-email-hch@lst.de
This commit is contained in:
Thomas Gleixner
2016-09-14 16:18:47 +02:00
parent 9395452b4a
commit 28f4b04143
5 changed files with 31 additions and 12 deletions
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6
drivers/pci/msi.c
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@@ -555,7 +555,7 @@ static struct msi_desc *msi_setup_entry(struct pci_dev *dev, int nvec)
struct msi_desc *entry;
/* MSI Entry Initialization */
entry = alloc_msi_entry(&dev->dev);
entry = alloc_msi_entry(&dev->dev, nvec, NULL);
if (!entry)
return NULL;
@@ -568,7 +568,6 @@ static struct msi_desc *msi_setup_entry(struct pci_dev *dev, int nvec)
entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
entry->msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1;
entry->msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec));
entry->nvec_used = nvec;
entry->affinity = dev->irq_affinity;
if (control & PCI_MSI_FLAGS_64BIT)
@@ -693,7 +692,7 @@ static int msix_setup_entries(struct pci_dev *dev, void __iomem *base,
mask = cpumask_of(cpu);
}
entry = alloc_msi_entry(&dev->dev);
entry = alloc_msi_entry(&dev->dev, 1, NULL);
if (!entry) {
if (!i)
iounmap(base);
@@ -711,7 +710,6 @@ static int msix_setup_entries(struct pci_dev *dev, void __iomem *base,
entry->msi_attrib.entry_nr = i;
entry->msi_attrib.default_irq = dev->irq;
entry->mask_base = base;
entry->nvec_used = 1;
entry->affinity = mask;
list_add_tail(&entry->list, dev_to_msi_list(&dev->dev));