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| author | Christoph Hellwig <hch@lst.de> | 2016-07-12 18:20:14 +0900 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2016-07-21 15:04:24 -0500 |
| commit | 5eb6d660193ccc471b415d6f31e17312a63de167 (patch) | |
| tree | 904684139e077310120e0ef52732d15d691a5af8 /drivers/pci/msi.c | |
| parent | 5e385a6ef31fbbf2acbda770aecc2bc2ff933d17 (diff) | |
| download | linux-5eb6d660193ccc471b415d6f31e17312a63de167.tar.gz linux-5eb6d660193ccc471b415d6f31e17312a63de167.tar.bz2 linux-5eb6d660193ccc471b415d6f31e17312a63de167.zip | |
PCI: Add pci_msix_desc_addr() helper
Add a pci_msix_desc_addr() helper to factor out the calculation of the base
address for a given MSI-X vector.
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 'drivers/pci/msi.c')
| -rw-r--r-- | drivers/pci/msi.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index a080f4496fe2..0d94fbf95ba6 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -207,6 +207,12 @@ static void msi_mask_irq(struct msi_desc *desc, u32 mask, u32 flag) desc->masked = __pci_msi_desc_mask_irq(desc, mask, flag); } +static void __iomem *pci_msix_desc_addr(struct msi_desc *desc) +{ + return desc->mask_base + + desc->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE; +} + /* * This internal function does not flush PCI writes to the device. * All users must ensure that they read from the device before either @@ -217,8 +223,6 @@ static void msi_mask_irq(struct msi_desc *desc, u32 mask, u32 flag) u32 __pci_msix_desc_mask_irq(struct msi_desc *desc, u32 flag) { u32 mask_bits = desc->masked; - unsigned offset = desc->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE + - PCI_MSIX_ENTRY_VECTOR_CTRL; if (pci_msi_ignore_mask) return 0; @@ -226,7 +230,7 @@ u32 __pci_msix_desc_mask_irq(struct msi_desc *desc, u32 flag) mask_bits &= ~PCI_MSIX_ENTRY_CTRL_MASKBIT; if (flag) mask_bits |= PCI_MSIX_ENTRY_CTRL_MASKBIT; - writel(mask_bits, desc->mask_base + offset); + writel(mask_bits, pci_msix_desc_addr(desc) + PCI_MSIX_ENTRY_VECTOR_CTRL); return mask_bits; } @@ -284,8 +288,7 @@ void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg) BUG_ON(dev->current_state != PCI_D0); if (entry->msi_attrib.is_msix) { - void __iomem *base = entry->mask_base + - entry->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE; + void __iomem *base = pci_msix_desc_addr(entry); msg->address_lo = readl(base + PCI_MSIX_ENTRY_LOWER_ADDR); msg->address_hi = readl(base + PCI_MSIX_ENTRY_UPPER_ADDR); @@ -315,9 +318,7 @@ void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg) if (dev->current_state != PCI_D0) { /* Don't touch the hardware now */ } else if (entry->msi_attrib.is_msix) { - void __iomem *base; - base = entry->mask_base + - entry->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE; + void __iomem *base = pci_msix_desc_addr(entry); writel(msg->address_lo, base + PCI_MSIX_ENTRY_LOWER_ADDR); writel(msg->address_hi, base + PCI_MSIX_ENTRY_UPPER_ADDR); |