Let's provide a more general way to scan PCI bars, rather than read the
config registers every time.
Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
---
lib/pci.c | 14 ++++++++++++++
lib/pci.h | 3 +++
2 files changed, 17 insertions(+)
diff --git a/lib/pci.c b/lib/pci.c
index bb41e0f..95a6581 100644
--- a/lib/pci.c
+++ b/lib/pci.c
@@ -35,6 +35,20 @@ int pci_find_dev(struct pci_dev *pci_dev, uint16_t vendor_id, uint16_t device_id
return -1;
}
+void pci_scan_bars(struct pci_dev *dev)
+{
+ int i = 0;
+
+ for (i = 0; i < PCI_BAR_NUM; i++) {
+ if (!pci_bar_is_valid(dev, i))
+ continue;
+ dev->pci_bar[i] = pci_bar_get_addr(dev, i);
+ printf("PCI: init dev 0x%04x BAR %d [%s] addr 0x%lx\n",
+ dev->pci_bdf, i, pci_bar_is_memory(dev, i) ?
+ "MEM" : "IO", dev->pci_bar[i]);
+ }
+}
+
uint32_t pci_bar_mask(uint32_t bar)
{
return (bar & PCI_BASE_ADDRESS_SPACE_IO) ?
diff --git a/lib/pci.h b/lib/pci.h
index af20dc5..56b49f0 100644
--- a/lib/pci.h
+++ b/lib/pci.h
@@ -15,13 +15,16 @@ enum {
PCIDEVADDR_INVALID = 0xffff,
};
+#define PCI_BAR_NUM (6)
#define PCI_DEVFN_MAX (256)
struct pci_dev {
uint16_t pci_bdf;
+ phys_addr_t pci_bar[PCI_BAR_NUM];
};
void pci_dev_init(struct pci_dev *dev, pcidevaddr_t bdf);
+void pci_scan_bars(struct pci_dev *dev);
extern bool pci_probe(void);
extern void pci_print(void);
--
2.7.4
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
