diff options
Diffstat (limited to 'drivers/pci/setup-res.c')
| -rw-r--r-- | drivers/pci/setup-res.c | 48 |
1 files changed, 34 insertions, 14 deletions
diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c index 9526e341988b..4bc589ee78d0 100644 --- a/drivers/pci/setup-res.c +++ b/drivers/pci/setup-res.c @@ -25,21 +25,18 @@ #include <linux/slab.h> #include "pci.h" - -void pci_update_resource(struct pci_dev *dev, int resno) +static void pci_std_update_resource(struct pci_dev *dev, int resno) { struct pci_bus_region region; bool disable; u16 cmd; u32 new, check, mask; int reg; - enum pci_bar_type type; struct resource *res = dev->resource + resno; - if (dev->is_virtfn) { - dev_warn(&dev->dev, "can't update VF BAR%d\n", resno); + /* Per SR-IOV spec 3.4.1.11, VF BARs are RO zero */ + if (dev->is_virtfn) return; - } /* * Ignore resources for unimplemented BARs and unused resource slots @@ -60,21 +57,34 @@ void pci_update_resource(struct pci_dev *dev, int resno) return; pcibios_resource_to_bus(dev->bus, ®ion, res); + new = region.start; - new = region.start | (res->flags & PCI_REGION_FLAG_MASK); - if (res->flags & IORESOURCE_IO) + if (res->flags & IORESOURCE_IO) { mask = (u32)PCI_BASE_ADDRESS_IO_MASK; - else + new |= res->flags & ~PCI_BASE_ADDRESS_IO_MASK; + } else if (resno == PCI_ROM_RESOURCE) { + mask = (u32)PCI_ROM_ADDRESS_MASK; + } else { mask = (u32)PCI_BASE_ADDRESS_MEM_MASK; + new |= res->flags & ~PCI_BASE_ADDRESS_MEM_MASK; + } - reg = pci_resource_bar(dev, resno, &type); - if (!reg) - return; - if (type != pci_bar_unknown) { + if (resno < PCI_ROM_RESOURCE) { + reg = PCI_BASE_ADDRESS_0 + 4 * resno; + } else if (resno == PCI_ROM_RESOURCE) { + + /* + * Apparently some Matrox devices have ROM BARs that read + * as zero when disabled, so don't update ROM BARs unless + * they're enabled. See https://lkml.org/lkml/2005/8/30/138. + */ if (!(res->flags & IORESOURCE_ROM_ENABLE)) return; + + reg = dev->rom_base_reg; new |= PCI_ROM_ADDRESS_ENABLE; - } + } else + return; /* * We can't update a 64-bit BAR atomically, so when possible, @@ -110,6 +120,16 @@ void pci_update_resource(struct pci_dev *dev, int resno) pci_write_config_word(dev, PCI_COMMAND, cmd); } +void pci_update_resource(struct pci_dev *dev, int resno) +{ + if (resno <= PCI_ROM_RESOURCE) + pci_std_update_resource(dev, resno); +#ifdef CONFIG_PCI_IOV + else if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END) + pci_iov_update_resource(dev, resno); +#endif +} + int pci_claim_resource(struct pci_dev *dev, int resource) { struct resource *res = &dev->resource[resource]; |