bnx2x: Obtain Bus Device Function from register
BDF was obtained from kernel but since in virtualized environment
(e.g. physical device assigment in KVM) the function number may
not be the real one, the info must be obtained from the device.
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
index e56b832..115d77a 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
@@ -10546,6 +10546,7 @@
{
struct bnx2x *bp;
int rc;
+ u32 pci_cfg_dword;
bool chip_is_e1x = (board_type == BCM57710 ||
board_type == BCM57711 ||
board_type == BCM57711E);
@@ -10556,7 +10557,6 @@
bp->dev = dev;
bp->pdev = pdev;
bp->flags = 0;
- bp->pf_num = PCI_FUNC(pdev->devfn);
rc = pci_enable_device(pdev);
if (rc) {
@@ -10623,6 +10623,21 @@
goto err_out_release;
}
+ /* In E1/E1H use pci device function given by kernel.
+ * In E2/E3 read physical function from ME register since these chips
+ * support Physical Device Assignment where kernel BDF maybe arbitrary
+ * (depending on hypervisor).
+ */
+ if (chip_is_e1x)
+ bp->pf_num = PCI_FUNC(pdev->devfn);
+ else {/* chip is E2/3*/
+ pci_read_config_dword(bp->pdev,
+ PCICFG_ME_REGISTER, &pci_cfg_dword);
+ bp->pf_num = (u8)((pci_cfg_dword & ME_REG_ABS_PF_NUM) >>
+ ME_REG_ABS_PF_NUM_SHIFT);
+ }
+ DP(BNX2X_MSG_SP, "me reg PF num: %d\n", bp->pf_num);
+
bnx2x_set_power_state(bp, PCI_D0);
/* clean indirect addresses */