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[BNX2]: Disable MSI on 5706 if AMD 8132 bridge is present.

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MSI is defined to be 32-bit write.  The 5706 does 64-bit MSI writes
with byte enables disabled on the unused 32-bit word.  This is legal
but causes problems on the AMD 8132 which will eventually stop
responding after a while.

Without this patch, the MSI test done by the driver during open will
pass, but MSI will eventually stop working after a few MSIs are
written by the device.

AMD believes this incompatibility is unique to the 5706, and
prefers to locally disable MSI rather than globally disabling it
using pci_msi_quirk.

Update version to 1.4.45.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan 2006-09-29 17:06:23 -07:00 committed by David S. Miller
parent 95d4e6be25
commit f9317a40c4
2 changed files with 31 additions and 2 deletions
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32
drivers/net/bnx2.c
View File

@ -56,8 +56,8 @@
#define DRV_MODULE_NAME "bnx2"
#define PFX DRV_MODULE_NAME ": "
#define DRV_MODULE_VERSION "1.4.44"
#define DRV_MODULE_RELDATE "August 10, 2006"
#define DRV_MODULE_VERSION "1.4.45"
#define DRV_MODULE_RELDATE "September 29, 2006"
#define RUN_AT(x) (jiffies + (x))
@ -5805,6 +5805,34 @@ bnx2_init_board(struct pci_dev *pdev, struct net_device *dev)
bp->cmd_ticks_int = bp->cmd_ticks;
}
/* Disable MSI on 5706 if AMD 8132 bridge is found.
*
* MSI is defined to be 32-bit write. The 5706 does 64-bit MSI writes
* with byte enables disabled on the unused 32-bit word. This is legal
* but causes problems on the AMD 8132 which will eventually stop
* responding after a while.
*
* AMD believes this incompatibility is unique to the 5706, and
* prefers to locally disable MSI rather than globally disabling it
* using pci_msi_quirk.
*/
if (CHIP_NUM(bp) == CHIP_NUM_5706 && disable_msi == 0) {
struct pci_dev *amd_8132 = NULL;
while ((amd_8132 = pci_get_device(PCI_VENDOR_ID_AMD,
PCI_DEVICE_ID_AMD_8132_BRIDGE,
amd_8132))) {
u8 rev;
pci_read_config_byte(amd_8132, PCI_REVISION_ID, &rev);
if (rev >= 0x10 && rev <= 0x13) {
disable_msi = 1;
pci_dev_put(amd_8132);
break;
}
}
}
bp->autoneg = AUTONEG_SPEED | AUTONEG_FLOW_CTRL;
bp->req_line_speed = 0;
if (bp->phy_flags & PHY_SERDES_FLAG) {

1
include/linux/pci_ids.h
View File

@ -507,6 +507,7 @@
#define PCI_DEVICE_ID_AMD_8151_0 0x7454
#define PCI_DEVICE_ID_AMD_8131_BRIDGE 0x7450
#define PCI_DEVICE_ID_AMD_8131_APIC 0x7451
#define PCI_DEVICE_ID_AMD_8132_BRIDGE 0x7458
#define PCI_DEVICE_ID_AMD_CS5536_ISA 0x2090
#define PCI_DEVICE_ID_AMD_CS5536_FLASH 0x2091
#define PCI_DEVICE_ID_AMD_CS5536_AUDIO 0x2093