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author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-06 11:44:36 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-06 11:44:36 -0700 |
commit | 1cfd2bda8c486ae0e7a8005354758ebb68172bca (patch) | |
tree | 76ce15f377d8d6eb3ae4aa8b8b0b415457e38d36 /drivers/pci/msi.c | |
parent | b57bdda58cda0aaf6def042d101dd85977a286ed (diff) | |
parent | 763e9db9994e27a7d2cb3701c8a097a867d0e0b4 (diff) | |
download | linux-1cfd2bda8c486ae0e7a8005354758ebb68172bca.tar.gz linux-1cfd2bda8c486ae0e7a8005354758ebb68172bca.tar.xz |
Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: (30 commits)
PCI: update for owner removal from struct device_attribute
PCI: Fix warnings when CONFIG_DMI unset
PCI: Do not run NVidia quirks related to MSI with MSI disabled
x86/PCI: use for_each_pci_dev()
PCI: use for_each_pci_dev()
PCI: MSI: Restore read_msi_msg_desc(); add get_cached_msi_msg_desc()
PCI: export SMBIOS provided firmware instance and label to sysfs
PCI: Allow read/write access to sysfs I/O port resources
x86/PCI: use host bridge _CRS info on ASRock ALiveSATA2-GLAN
PCI: remove unused HAVE_ARCH_PCI_SET_DMA_MAX_SEGMENT_{SIZE|BOUNDARY}
PCI: disable mmio during bar sizing
PCI: MSI: Remove unsafe and unnecessary hardware access
PCI: Default PCIe ASPM control to on and require !EMBEDDED to disable
PCI: kernel oops on access to pci proc file while hot-removal
PCI: pci-sysfs: remove casts from void*
ACPI: Disable ASPM if the platform won't provide _OSC control for PCIe
PCI hotplug: make sure child bridges are enabled at hotplug time
PCI hotplug: shpchp: Removed check for hotplug of display devices
PCI hotplug: pciehp: Fixed return value sign for pciehp_unconfigure_device
PCI: Don't enable aspm before drivers have had a chance to veto it
...
Diffstat (limited to 'drivers/pci/msi.c')
-rw-r--r-- | drivers/pci/msi.c | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 77b68eaf021e..69b7be33b3a2 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -196,6 +196,9 @@ void unmask_msi_irq(unsigned int irq) void read_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg) { struct msi_desc *entry = get_irq_desc_msi(desc); + + BUG_ON(entry->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; @@ -229,10 +232,32 @@ void read_msi_msg(unsigned int irq, struct msi_msg *msg) read_msi_msg_desc(desc, msg); } +void get_cached_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg) +{ + struct msi_desc *entry = get_irq_desc_msi(desc); + + /* Assert that the cache is valid, assuming that + * valid messages are not all-zeroes. */ + BUG_ON(!(entry->msg.address_hi | entry->msg.address_lo | + entry->msg.data)); + + *msg = entry->msg; +} + +void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg) +{ + struct irq_desc *desc = irq_to_desc(irq); + + get_cached_msi_msg_desc(desc, msg); +} + void write_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg) { struct msi_desc *entry = get_irq_desc_msi(desc); - if (entry->msi_attrib.is_msix) { + + if (entry->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; @@ -435,7 +460,7 @@ static int msi_capability_init(struct pci_dev *dev, int nvec) static void __iomem *msix_map_region(struct pci_dev *dev, unsigned pos, unsigned nr_entries) { - unsigned long phys_addr; + resource_size_t phys_addr; u32 table_offset; u8 bir; |