[PATCH] skge: handle pci errors better
When a PCI error occurs, try and report more info.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/skge.c b/drivers/net/skge.c
index 7f8e8dd0..0325fbc 100644
--- a/drivers/net/skge.c
+++ b/drivers/net/skge.c
@@ -2764,17 +2764,6 @@
? GMF_CLI_TX_FC : GMF_CLI_TX_PE);
}
-static void skge_pci_clear(struct skge_hw *hw)
-{
- u16 status;
-
- pci_read_config_word(hw->pdev, PCI_STATUS, &status);
- skge_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
- pci_write_config_word(hw->pdev, PCI_STATUS,
- status | PCI_STATUS_ERROR_BITS);
- skge_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
-}
-
static void skge_mac_intr(struct skge_hw *hw, int port)
{
if (hw->chip_id == CHIP_ID_GENESIS)
@@ -2816,23 +2805,39 @@
if (hwstatus & IS_M2_PAR_ERR)
skge_mac_parity(hw, 1);
- if (hwstatus & IS_R1_PAR_ERR)
+ if (hwstatus & IS_R1_PAR_ERR) {
+ printk(KERN_ERR PFX "%s: receive queue parity error\n",
+ hw->dev[0]->name);
skge_write32(hw, B0_R1_CSR, CSR_IRQ_CL_P);
+ }
- if (hwstatus & IS_R2_PAR_ERR)
+ if (hwstatus & IS_R2_PAR_ERR) {
+ printk(KERN_ERR PFX "%s: receive queue parity error\n",
+ hw->dev[1]->name);
skge_write32(hw, B0_R2_CSR, CSR_IRQ_CL_P);
+ }
if (hwstatus & (IS_IRQ_MST_ERR|IS_IRQ_STAT)) {
- printk(KERN_ERR PFX "hardware error detected (status 0x%x)\n",
- hwstatus);
+ u16 pci_status, pci_cmd;
- skge_pci_clear(hw);
+ pci_read_config_word(hw->pdev, PCI_COMMAND, &pci_cmd);
+ pci_read_config_word(hw->pdev, PCI_STATUS, &pci_status);
+
+ printk(KERN_ERR PFX "%s: PCI error cmd=%#x status=%#x\n",
+ pci_name(hw->pdev), pci_cmd, pci_status);
+
+ /* Write the error bits back to clear them. */
+ pci_status &= PCI_STATUS_ERROR_BITS;
+ skge_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
+ pci_write_config_word(hw->pdev, PCI_COMMAND,
+ pci_cmd | PCI_COMMAND_SERR | PCI_COMMAND_PARITY);
+ pci_write_config_word(hw->pdev, PCI_STATUS, pci_status);
+ skge_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
/* if error still set then just ignore it */
hwstatus = skge_read32(hw, B0_HWE_ISRC);
if (hwstatus & IS_IRQ_STAT) {
- pr_debug("IRQ status %x: still set ignoring hardware errors\n",
- hwstatus);
+ printk(KERN_INFO PFX "unable to clear error (so ignoring them)\n");
hw->intr_mask &= ~IS_HW_ERR;
}
}
@@ -2998,7 +3003,7 @@
static int skge_reset(struct skge_hw *hw)
{
u32 reg;
- u16 ctst;
+ u16 ctst, pci_status;
u8 t8, mac_cfg, pmd_type, phy_type;
int i;
@@ -3009,8 +3014,13 @@
skge_write8(hw, B0_CTST, CS_RST_CLR);
/* clear PCI errors, if any */
- skge_pci_clear(hw);
+ skge_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
+ skge_write8(hw, B2_TST_CTRL2, 0);
+ pci_read_config_word(hw->pdev, PCI_STATUS, &pci_status);
+ pci_write_config_word(hw->pdev, PCI_STATUS,
+ pci_status | PCI_STATUS_ERROR_BITS);
+ skge_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
skge_write8(hw, B0_CTST, CS_MRST_CLR);
/* restore CLK_RUN bits (for Yukon-Lite) */
@@ -3377,7 +3387,6 @@
skge_write32(hw, B0_IMSK, 0);
skge_write16(hw, B0_LED, LED_STAT_OFF);
- skge_pci_clear(hw);
skge_write8(hw, B0_CTST, CS_RST_SET);
tasklet_kill(&hw->ext_tasklet);