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authorStephen Hemminger <shemminger@linux-foundation.org>2007-11-05 15:52:13 -0800
committerJeff Garzik <jeff@garzik.org>2007-11-10 04:25:09 -0500
commitcf06ffb4df5314d240a002e3e1c63722e9362070 (patch)
tree2c96afb706f9a87129c95f2631aeab7d21acd6bb
parentab1a145638addee40587daf12c98ec6a30029f0a (diff)
downloadop-kernel-dev-cf06ffb4df5314d240a002e3e1c63722e9362070.zip
op-kernel-dev-cf06ffb4df5314d240a002e3e1c63722e9362070.tar.gz
sky2: handle advanced error recovery config issues
The PCI AER support may not work for a couple of reasons. It may not be configured into the kernel or there may be a BIOS bug that prevents MMCONFIG from working. If MMCONFIG doesn't work then the PCI registers that control AER will not be accessible via pci_read_config functions; luckly there is another window to access PCI space in the device, so use that. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
-rw-r--r--drivers/net/sky2.c34
-rw-r--r--drivers/net/sky2.h3
2 files changed, 30 insertions, 7 deletions
diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 76038bb..a6ccd11 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -2435,13 +2435,26 @@ static void sky2_hw_intr(struct sky2_hw *hw)
if (status & Y2_IS_PCI_EXP) {
/* PCI-Express uncorrectable Error occurred */
- int pos = pci_find_aer_capability(hw->pdev);
+ int aer = pci_find_aer_capability(hw->pdev);
u32 err;
- pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_STATUS, &err);
+ if (aer) {
+ pci_read_config_dword(pdev, aer + PCI_ERR_UNCOR_STATUS,
+ &err);
+ pci_cleanup_aer_uncorrect_error_status(pdev);
+ } else {
+ /* Either AER not configured, or not working
+ * because of bad MMCONFIG, so just do recover
+ * manually.
+ */
+ err = sky2_read32(hw, Y2_CFG_AER + PCI_ERR_UNCOR_STATUS);
+ sky2_write32(hw, Y2_CFG_AER + PCI_ERR_UNCOR_STATUS,
+ 0xfffffffful);
+ }
+
if (net_ratelimit())
dev_err(&pdev->dev, "PCI Express error (0x%x)\n", err);
- pci_cleanup_aer_uncorrect_error_status(pdev);
+
}
if (status & Y2_HWE_L1_MASK)
@@ -2799,9 +2812,18 @@ static void sky2_reset(struct sky2_hw *hw)
cap = pci_find_capability(pdev, PCI_CAP_ID_EXP);
if (cap) {
- /* Check for advanced error reporting */
- pci_cleanup_aer_uncorrect_error_status(pdev);
- pci_cleanup_aer_correct_error_status(pdev);
+ if (pci_find_aer_capability(pdev)) {
+ /* Check for advanced error reporting */
+ pci_cleanup_aer_uncorrect_error_status(pdev);
+ pci_cleanup_aer_correct_error_status(pdev);
+ } else {
+ dev_warn(&pdev->dev,
+ "PCI Express Advanced Error Reporting"
+ " not configured or MMCONFIG problem?\n");
+
+ sky2_write32(hw, Y2_CFG_AER + PCI_ERR_UNCOR_STATUS,
+ 0xfffffffful);
+ }
/* If error bit is stuck on ignore it */
if (sky2_read32(hw, B0_HWE_ISRC) & Y2_IS_PCI_EXP)
diff --git a/drivers/net/sky2.h b/drivers/net/sky2.h
index 49ee264..69525fd 100644
--- a/drivers/net/sky2.h
+++ b/drivers/net/sky2.h
@@ -247,7 +247,8 @@ enum csr_regs {
B3_PA_CTRL = 0x01f0,
B3_PA_TEST = 0x01f2,
- Y2_CFG_SPC = 0x1c00,
+ Y2_CFG_SPC = 0x1c00, /* PCI config space region */
+ Y2_CFG_AER = 0x1d00, /* PCI Advanced Error Report region */
};
/* B0_CTST 16 bit Control/Status register */
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