From: Suneel Garapati <sgarap...@marvell.com>
If ARI capability is found on device, use it to update next function
number in bus scan and also helps to skip unnecessary bdf scans.
Signed-off-by: Suneel Garapati <sgarap...@marvell.com>
---
drivers/pci/pci-uclass.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c
index f9823231b1..b02588b552 100644
--- a/drivers/pci/pci-uclass.c
+++ b/drivers/pci/pci-uclass.c
@@ -773,7 +773,7 @@ int pci_bind_bus_devices(struct udevice *bus)
ulong header_type;
pci_dev_t bdf, end;
bool found_multi;
- int ret;
+ int ret, ari_off;
found_multi = false;
end = PCI_BDF(bus->seq, PCI_MAX_PCI_DEVICES - 1,
@@ -846,6 +846,22 @@ int pci_bind_bus_devices(struct udevice *bus)
pplat->vendor = vendor;
pplat->device = device;
pplat->class = class;
+
+ ari_off = dm_pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ARI);
+ if (ari_off) {
+ u16 ari_cap;
+
+ /* Read Next Function number in ARI Cap Register */
+ dm_pci_read_config16(dev, ari_off + 4, &ari_cap);
+ /* Update next scan on this function number,
+ * subtract 1 in BDF to satisfy loop increment.
+ */
+ if (ari_cap & 0xff00) {
+ bdf = PCI_BDF(PCI_BUS(bdf), PCI_DEV(ari_cap),
+ PCI_FUNC(ari_cap));
+ bdf = bdf - 0x100;
+ }
+ }
}
return 0;
--
2.23.0
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