diff options
Diffstat (limited to 'drivers/xen/xen-pciback')
| -rw-r--r-- | drivers/xen/xen-pciback/conf_space_header.c | 71 |
1 files changed, 66 insertions, 5 deletions
diff --git a/drivers/xen/xen-pciback/conf_space_header.c b/drivers/xen/xen-pciback/conf_space_header.c index 40166e04a2b..dcd6dd964e3 100644 --- a/drivers/xen/xen-pciback/conf_space_header.c +++ b/drivers/xen/xen-pciback/conf_space_header.c @@ -18,6 +18,25 @@ struct pci_bar_info { #define is_enable_cmd(value) ((value)&(PCI_COMMAND_MEMORY|PCI_COMMAND_IO)) #define is_master_cmd(value) ((value)&PCI_COMMAND_MASTER) +static int command_read(struct pci_dev *dev, int offset, u16 *value, void *data) +{ + int i; + int ret; + + ret = pciback_read_config_word(dev, offset, value, data); + if (!atomic_read(&dev->enable_cnt)) + return ret; + + for (i = 0; i < PCI_ROM_RESOURCE; i++) { + if (dev->resource[i].flags & IORESOURCE_IO) + *value |= PCI_COMMAND_IO; + if (dev->resource[i].flags & IORESOURCE_MEM) + *value |= PCI_COMMAND_MEMORY; + } + + return ret; +} + static int command_write(struct pci_dev *dev, int offset, u16 value, void *data) { int err; @@ -142,10 +161,26 @@ static inline void read_dev_bar(struct pci_dev *dev, struct pci_bar_info *bar_info, int offset, u32 len_mask) { - pci_read_config_dword(dev, offset, &bar_info->val); - pci_write_config_dword(dev, offset, len_mask); - pci_read_config_dword(dev, offset, &bar_info->len_val); - pci_write_config_dword(dev, offset, bar_info->val); + int pos; + struct resource *res = dev->resource; + + if (offset == PCI_ROM_ADDRESS || offset == PCI_ROM_ADDRESS1) + pos = PCI_ROM_RESOURCE; + else { + pos = (offset - PCI_BASE_ADDRESS_0) / 4; + if (pos && ((res[pos - 1].flags & (PCI_BASE_ADDRESS_SPACE | + PCI_BASE_ADDRESS_MEM_TYPE_MASK)) == + (PCI_BASE_ADDRESS_SPACE_MEMORY | + PCI_BASE_ADDRESS_MEM_TYPE_64))) { + bar_info->val = res[pos - 1].start >> 32; + bar_info->len_val = res[pos - 1].end >> 32; + return; + } + } + + bar_info->val = res[pos].start | + (res[pos].flags & PCI_REGION_FLAG_MASK); + bar_info->len_val = res[pos].end - res[pos].start + 1; } static void *bar_init(struct pci_dev *dev, int offset) @@ -186,6 +221,22 @@ static void bar_release(struct pci_dev *dev, int offset, void *data) kfree(data); } +static int pciback_read_vendor(struct pci_dev *dev, int offset, + u16 *value, void *data) +{ + *value = dev->vendor; + + return 0; +} + +static int pciback_read_device(struct pci_dev *dev, int offset, + u16 *value, void *data) +{ + *value = dev->device; + + return 0; +} + static int interrupt_read(struct pci_dev *dev, int offset, u8 * value, void *data) { @@ -213,9 +264,19 @@ out: static const struct config_field header_common[] = { { + .offset = PCI_VENDOR_ID, + .size = 2, + .u.w.read = pciback_read_vendor, + }, + { + .offset = PCI_DEVICE_ID, + .size = 2, + .u.w.read = pciback_read_device, + }, + { .offset = PCI_COMMAND, .size = 2, - .u.w.read = pciback_read_config_word, + .u.w.read = command_read, .u.w.write = command_write, }, { |