From 7bd656d12119708b37414bf909ab2995473da818 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Mon, 9 Oct 2006 14:40:38 -0700 Subject: [PATCH] sky2: revert pci express extensions The pci express error handling extensions don't work unless PCI access is via mmconfig. Otherwise, all accesses to pci config registers greater than 256 fail. Since the sky2 driver has other ways of getting to PCI config space, it works around this short coming, but the pci_find_ext_capablity doesn't work. This backs out commit 91aeb3edbcf4e6ed72d138ac8c22fd68e6d717c3 Go back to hardcoding, since we know where the error registers are anyway. Fixes http://bugzilla.kernel.org/show_bug.cgi?id=7222 Signed-off-by: Stephen Hemminger Signed-off-by: Jeff Garzik --- drivers/net/sky2.c | 30 ++++++++---------------------- drivers/net/sky2.h | 45 +++++++++++++++++++++++++++++++++++++++++++-- 2 files changed, 51 insertions(+), 24 deletions(-) diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c index 5a5289b7a885..1f91f30f4c6d 100644 --- a/drivers/net/sky2.c +++ b/drivers/net/sky2.c @@ -2220,8 +2220,7 @@ static void sky2_hw_intr(struct sky2_hw *hw) /* PCI-Express uncorrectable Error occurred */ u32 pex_err; - pex_err = sky2_pci_read32(hw, - hw->err_cap + PCI_ERR_UNCOR_STATUS); + pex_err = sky2_pci_read32(hw, PEX_UNC_ERR_STAT); if (net_ratelimit()) printk(KERN_ERR PFX "%s: pci express error (0x%x)\n", @@ -2229,20 +2228,15 @@ static void sky2_hw_intr(struct sky2_hw *hw) /* clear the interrupt */ sky2_write32(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON); - sky2_pci_write32(hw, - hw->err_cap + PCI_ERR_UNCOR_STATUS, - 0xffffffffUL); + sky2_pci_write32(hw, PEX_UNC_ERR_STAT, + 0xffffffffUL); sky2_write32(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF); - - /* In case of fatal error mask off to keep from getting stuck */ - if (pex_err & (PCI_ERR_UNC_POISON_TLP | PCI_ERR_UNC_FCP - | PCI_ERR_UNC_DLP)) { + if (pex_err & PEX_FATAL_ERRORS) { u32 hwmsk = sky2_read32(hw, B0_HWE_IMSK); hwmsk &= ~Y2_IS_PCI_EXP; sky2_write32(hw, B0_HWE_IMSK, hwmsk); } - } if (status & Y2_HWE_L1_MASK) @@ -2423,7 +2417,6 @@ static int sky2_reset(struct sky2_hw *hw) u16 status; u8 t8; int i; - u32 msk; sky2_write8(hw, B0_CTST, CS_RST_CLR); @@ -2464,13 +2457,9 @@ static int sky2_reset(struct sky2_hw *hw) sky2_write8(hw, B0_CTST, CS_MRST_CLR); /* clear any PEX errors */ - if (pci_find_capability(hw->pdev, PCI_CAP_ID_EXP)) { - hw->err_cap = pci_find_ext_capability(hw->pdev, PCI_EXT_CAP_ID_ERR); - if (hw->err_cap) - sky2_pci_write32(hw, - hw->err_cap + PCI_ERR_UNCOR_STATUS, - 0xffffffffUL); - } + if (pci_find_capability(hw->pdev, PCI_CAP_ID_EXP)) + sky2_pci_write32(hw, PEX_UNC_ERR_STAT, 0xffffffffUL); + hw->pmd_type = sky2_read8(hw, B2_PMD_TYP); hw->ports = 1; @@ -2527,10 +2516,7 @@ static int sky2_reset(struct sky2_hw *hw) sky2_write8(hw, RAM_BUFFER(i, B3_RI_RTO_XS2), SK_RI_TO_53); } - msk = Y2_HWE_ALL_MASK; - if (!hw->err_cap) - msk &= ~Y2_IS_PCI_EXP; - sky2_write32(hw, B0_HWE_IMSK, msk); + sky2_write32(hw, B0_HWE_IMSK, Y2_HWE_ALL_MASK); for (i = 0; i < hw->ports; i++) sky2_gmac_reset(hw, i); diff --git a/drivers/net/sky2.h b/drivers/net/sky2.h index f66109a96d95..43d2accf60e1 100644 --- a/drivers/net/sky2.h +++ b/drivers/net/sky2.h @@ -6,15 +6,24 @@ #define ETH_JUMBO_MTU 9000 /* Maximum MTU supported */ -/* PCI device specific config registers */ +/* PCI config registers */ enum { PCI_DEV_REG1 = 0x40, PCI_DEV_REG2 = 0x44, + PCI_DEV_STATUS = 0x7c, PCI_DEV_REG3 = 0x80, PCI_DEV_REG4 = 0x84, PCI_DEV_REG5 = 0x88, }; +enum { + PEX_DEV_CAP = 0xe4, + PEX_DEV_CTRL = 0xe8, + PEX_DEV_STA = 0xea, + PEX_LNK_STAT = 0xf2, + PEX_UNC_ERR_STAT= 0x104, +}; + /* Yukon-2 */ enum pci_dev_reg_1 { PCI_Y2_PIG_ENA = 1<<31, /* Enable Plug-in-Go (YUKON-2) */ @@ -63,6 +72,39 @@ enum pci_dev_reg_4 { PCI_STATUS_REC_MASTER_ABORT | \ PCI_STATUS_REC_TARGET_ABORT | \ PCI_STATUS_PARITY) + +enum pex_dev_ctrl { + PEX_DC_MAX_RRS_MSK = 7<<12, /* Bit 14..12: Max. Read Request Size */ + PEX_DC_EN_NO_SNOOP = 1<<11,/* Enable No Snoop */ + PEX_DC_EN_AUX_POW = 1<<10,/* Enable AUX Power */ + PEX_DC_EN_PHANTOM = 1<<9, /* Enable Phantom Functions */ + PEX_DC_EN_EXT_TAG = 1<<8, /* Enable Extended Tag Field */ + PEX_DC_MAX_PLS_MSK = 7<<5, /* Bit 7.. 5: Max. Payload Size Mask */ + PEX_DC_EN_REL_ORD = 1<<4, /* Enable Relaxed Ordering */ + PEX_DC_EN_UNS_RQ_RP = 1<<3, /* Enable Unsupported Request Reporting */ + PEX_DC_EN_FAT_ER_RP = 1<<2, /* Enable Fatal Error Reporting */ + PEX_DC_EN_NFA_ER_RP = 1<<1, /* Enable Non-Fatal Error Reporting */ + PEX_DC_EN_COR_ER_RP = 1<<0, /* Enable Correctable Error Reporting */ +}; +#define PEX_DC_MAX_RD_RQ_SIZE(x) (((x)<<12) & PEX_DC_MAX_RRS_MSK) + +/* PEX_UNC_ERR_STAT PEX Uncorrectable Errors Status Register (Yukon-2) */ +enum pex_err { + PEX_UNSUP_REQ = 1<<20, /* Unsupported Request Error */ + + PEX_MALFOR_TLP = 1<<18, /* Malformed TLP */ + + PEX_UNEXP_COMP = 1<<16, /* Unexpected Completion */ + + PEX_COMP_TO = 1<<14, /* Completion Timeout */ + PEX_FLOW_CTRL_P = 1<<13, /* Flow Control Protocol Error */ + PEX_POIS_TLP = 1<<12, /* Poisoned TLP */ + + PEX_DATA_LINK_P = 1<<4, /* Data Link Protocol Error */ + PEX_FATAL_ERRORS= (PEX_MALFOR_TLP | PEX_FLOW_CTRL_P | PEX_DATA_LINK_P), +}; + + enum csr_regs { B0_RAP = 0x0000, B0_CTST = 0x0004, @@ -1836,7 +1878,6 @@ struct sky2_hw { struct net_device *dev[2]; int pm_cap; - int err_cap; u8 chip_id; u8 chip_rev; u8 pmd_type; -- cgit v1.2.3