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Commit b9d64acc authored by Stephen Hemminger's avatar Stephen Hemminger Committed by Jeff Garzik
Browse files

[PATCH] skge: handle pci errors better 



When a PCI error occurs, try and report more info.

Signed-off-by: default avatarStephen Hemminger <shemminger@osdl.org>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent 203babb6

drivers/net/skge.c

+30 −21
Original line number Diff line number Diff line
@@ -2764,17 +2764,6 @@ static void skge_mac_parity(struct skge_hw *hw, int port) 
			    ? 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 @@ static void skge_error_irq(struct skge_hw *hw) 
	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;



		pci_read_config_word(hw->pdev, PCI_COMMAND, &pci_cmd);

		pci_read_config_word(hw->pdev, PCI_STATUS, &pci_status);



		skge_pci_clear(hw);

		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 const char *skge_board_name(const struct skge_hw *hw) 
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 @@ static int skge_reset(struct skge_hw *hw) 
	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 @@ static void __devexit skge_remove(struct pci_dev *pdev) 


	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);