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authorMichael Chan <mchan@broadcom.com>2005-10-03 14:02:39 -0700
committerDavid S. Miller <davem@davemloft.net>2005-10-03 14:02:39 -0700
commit399de50bbbb2501a6db43daaa8a2dafbc9bcfe0c (patch)
tree1c4e6034b0d5485c4ed3d010acc2d60d52ec2ed8
parenta232f76732e11c91c2215d3a43cf9ebc7f939939 (diff)
[TG3]: Refine AMD K8 write-reorder chipset test.
Test for VIA K8T800 north bridge instead of AMD K8 HyperTransport bridge based on new information from Andi Kleen. The AMD HyperTransport interface is not responsible for PCI transactions and so the re-ordering is more likely done by the VIA north bridge. This code is subject to change if we get more information from AMD or VIA. PCI Express devices are excluded from doing the read flush since all chipsets in the write_reorder list are PCI chipsets. Signed-off-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/tg3.c23
1 files changed, 12 insertions, 11 deletions
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 25f85fb9df4..fee0e6e5ff1 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -9284,8 +9284,8 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
static struct pci_device_id write_reorder_chipsets[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_AMD,
PCI_DEVICE_ID_AMD_FE_GATE_700C) },
- { PCI_DEVICE(PCI_VENDOR_ID_AMD,
- PCI_DEVICE_ID_AMD_K8_NB) },
+ { PCI_DEVICE(PCI_VENDOR_ID_VIA,
+ PCI_DEVICE_ID_VIA_8385_0) },
{ },
};
u32 misc_ctrl_reg;
@@ -9300,15 +9300,6 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
tp->tg3_flags2 |= TG3_FLG2_SUN_570X;
#endif
- /* If we have an AMD 762 or K8 chipset, write
- * reordering to the mailbox registers done by the host
- * controller can cause major troubles. We read back from
- * every mailbox register write to force the writes to be
- * posted to the chip in order.
- */
- if (pci_dev_present(write_reorder_chipsets))
- tp->tg3_flags |= TG3_FLAG_MBOX_WRITE_REORDER;
-
/* Force memory write invalidate off. If we leave it on,
* then on 5700_BX chips we have to enable a workaround.
* The workaround is to set the TG3PCI_DMA_RW_CTRL boundary
@@ -9439,6 +9430,16 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
if (pci_find_capability(tp->pdev, PCI_CAP_ID_EXP) != 0)
tp->tg3_flags2 |= TG3_FLG2_PCI_EXPRESS;
+ /* If we have an AMD 762 or VIA K8T800 chipset, write
+ * reordering to the mailbox registers done by the host
+ * controller can cause major troubles. We read back from
+ * every mailbox register write to force the writes to be
+ * posted to the chip in order.
+ */
+ if (pci_dev_present(write_reorder_chipsets) &&
+ !(tp->tg3_flags2 & TG3_FLG2_PCI_EXPRESS))
+ tp->tg3_flags |= TG3_FLAG_MBOX_WRITE_REORDER;
+
if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5703 &&
tp->pci_lat_timer < 64) {
tp->pci_lat_timer = 64;