libpayload/storage/ahci: Use pacc pointer to read device class

The PCI bus gets already scanned while gathering system information.
Therefore, use the pacc pointer from sysinfo_t to read the device class
of PCI devices instead of rescanning the bus.

Change-Id: I4c79e71777e718f5065107ebf780ca9fdb4f1b0c
Signed-off-by: Felix Singer <felix.singer@secunet.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46416
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

1 files changed, 2 insertions, 17 deletions

diff --git a/payloads/libpayload/drivers/storage/ahci.c b/payloads/libpayload/drivers/storage/ahci.c
index ff22b19b71..e54bfbfef0 100644
--- a/payloads/libpayload/drivers/storage/ahci.c
+++ b/payloads/libpayload/drivers/storage/ahci.c
@@ -227,7 +227,8 @@ static u32 working_controllers[] = {
 	0x8086 | 0x5ae3 << 16, /* Apollo Lake */
 };
 #endif
-static void ahci_init_pci(pcidev_t dev)
+
+void ahci_initialize(pcidev_t dev)
 {
 	int i;
 
@@ -282,19 +283,3 @@ static void ahci_init_pci(pcidev_t dev)
 			ahci_port_probe(ctrl, &ports[i], i + 1);
 	}
 }
-
-void ahci_initialize(void)
-{
-	int bus, dev, func;
-
-	for (bus = 0; bus < 256; ++bus) {
-		for (dev = 0; dev < 32; ++dev) {
-			const u16 class =
-				pci_read_config16(PCI_DEV(bus, dev, 0), 0xa);
-			if (class != 0xffff) {
-				for (func = 0; func < 8; ++func)
-					ahci_init_pci(PCI_DEV(bus, dev, func));
-			}
-		}
-	}
-}