Add SR-IOV support for PV guest.
Signed-off-by: Yu Zhao <yu.zhao@xxxxxxxxx>
diff -r 6b4452adda52 -r 6ae4d1fd7e17 drivers/xen/pciback/conf_space_header.c
--- a/drivers/xen/pciback/conf_space_header.c Sat Sep 27 01:28:05 2008 -0400
+++ b/drivers/xen/pciback/conf_space_header.c Sat Sep 27 01:30:04 2008 -0400
@@ -17,6 +17,25 @@
#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 (!dev->is_enabled)
+ 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)
{
@@ -141,10 +160,26 @@
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)
@@ -185,6 +220,22 @@
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)
{
@@ -212,9 +263,19 @@
static 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,
},
{
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