diff options
Diffstat (limited to 'drivers/pci/access.c')
| -rw-r--r-- | drivers/pci/access.c | 148 |
1 files changed, 147 insertions, 1 deletions
diff --git a/drivers/pci/access.c b/drivers/pci/access.c index 446c58b5467b..5908d6e3b807 100644 --- a/drivers/pci/access.c +++ b/drivers/pci/access.c @@ -67,6 +67,93 @@ EXPORT_SYMBOL(pci_bus_write_config_byte); EXPORT_SYMBOL(pci_bus_write_config_word); EXPORT_SYMBOL(pci_bus_write_config_dword); +int pci_generic_config_read(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 *val) +{ + void __iomem *addr; + + addr = bus->ops->map_bus(bus, devfn, where); + if (!addr) { + *val = ~0; + return PCIBIOS_DEVICE_NOT_FOUND; + } + + if (size == 1) + *val = readb(addr); + else if (size == 2) + *val = readw(addr); + else + *val = readl(addr); + + return PCIBIOS_SUCCESSFUL; +} +EXPORT_SYMBOL_GPL(pci_generic_config_read); + +int pci_generic_config_write(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 val) +{ + void __iomem *addr; + + addr = bus->ops->map_bus(bus, devfn, where); + if (!addr) + return PCIBIOS_DEVICE_NOT_FOUND; + + if (size == 1) + writeb(val, addr); + else if (size == 2) + writew(val, addr); + else + writel(val, addr); + + return PCIBIOS_SUCCESSFUL; +} +EXPORT_SYMBOL_GPL(pci_generic_config_write); + +int pci_generic_config_read32(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 *val) +{ + void __iomem *addr; + + addr = bus->ops->map_bus(bus, devfn, where & ~0x3); + if (!addr) { + *val = ~0; + return PCIBIOS_DEVICE_NOT_FOUND; + } + + *val = readl(addr); + + if (size <= 2) + *val = (*val >> (8 * (where & 3))) & ((1 << (size * 8)) - 1); + + return PCIBIOS_SUCCESSFUL; +} +EXPORT_SYMBOL_GPL(pci_generic_config_read32); + +int pci_generic_config_write32(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 val) +{ + void __iomem *addr; + u32 mask, tmp; + + addr = bus->ops->map_bus(bus, devfn, where & ~0x3); + if (!addr) + return PCIBIOS_DEVICE_NOT_FOUND; + + if (size == 4) { + writel(val, addr); + return PCIBIOS_SUCCESSFUL; + } else { + mask = ~(((1 << (size * 8)) - 1) << ((where & 0x3) * 8)); + } + + tmp = readl(addr) & mask; + tmp |= val << ((where & 0x3) * 8); + writel(tmp, addr); + + return PCIBIOS_SUCCESSFUL; +} +EXPORT_SYMBOL_GPL(pci_generic_config_write32); + /** * pci_bus_set_ops - Set raw operations of pci bus * @bus: pci bus struct @@ -352,6 +439,56 @@ static const struct pci_vpd_ops pci_vpd_pci22_ops = { .release = pci_vpd_pci22_release, }; +static ssize_t pci_vpd_f0_read(struct pci_dev *dev, loff_t pos, size_t count, + void *arg) +{ + struct pci_dev *tdev = pci_get_slot(dev->bus, PCI_SLOT(dev->devfn)); + ssize_t ret; + + if (!tdev) + return -ENODEV; + + ret = pci_read_vpd(tdev, pos, count, arg); + pci_dev_put(tdev); + return ret; +} + +static ssize_t pci_vpd_f0_write(struct pci_dev *dev, loff_t pos, size_t count, + const void *arg) +{ + struct pci_dev *tdev = pci_get_slot(dev->bus, PCI_SLOT(dev->devfn)); + ssize_t ret; + + if (!tdev) + return -ENODEV; + + ret = pci_write_vpd(tdev, pos, count, arg); + pci_dev_put(tdev); + return ret; +} + +static const struct pci_vpd_ops pci_vpd_f0_ops = { + .read = pci_vpd_f0_read, + .write = pci_vpd_f0_write, + .release = pci_vpd_pci22_release, +}; + +static int pci_vpd_f0_dev_check(struct pci_dev *dev) +{ + struct pci_dev *tdev = pci_get_slot(dev->bus, PCI_SLOT(dev->devfn)); + int ret = 0; + + if (!tdev) + return -ENODEV; + if (!tdev->vpd || !tdev->multifunction || + dev->class != tdev->class || dev->vendor != tdev->vendor || + dev->device != tdev->device) + ret = -ENODEV; + + pci_dev_put(tdev); + return ret; +} + int pci_vpd_pci22_init(struct pci_dev *dev) { struct pci_vpd_pci22 *vpd; @@ -360,12 +497,21 @@ int pci_vpd_pci22_init(struct pci_dev *dev) cap = pci_find_capability(dev, PCI_CAP_ID_VPD); if (!cap) return -ENODEV; + if (dev->dev_flags & PCI_DEV_FLAGS_VPD_REF_F0) { + int ret = pci_vpd_f0_dev_check(dev); + + if (ret) + return ret; + } vpd = kzalloc(sizeof(*vpd), GFP_ATOMIC); if (!vpd) return -ENOMEM; vpd->base.len = PCI_VPD_PCI22_SIZE; - vpd->base.ops = &pci_vpd_pci22_ops; + if (dev->dev_flags & PCI_DEV_FLAGS_VPD_REF_F0) + vpd->base.ops = &pci_vpd_f0_ops; + else + vpd->base.ops = &pci_vpd_pci22_ops; mutex_init(&vpd->lock); vpd->cap = cap; vpd->busy = false; |