From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763639AbZEOM1Z (ORCPT ); Fri, 15 May 2009 08:27:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761937AbZEOMXJ (ORCPT ); Fri, 15 May 2009 08:23:09 -0400 Received: from wa4ehsobe004.messaging.microsoft.com ([216.32.181.14]:35631 "EHLO WA4EHSOBE004.bigfish.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1758858AbZEOMW4 (ORCPT ); Fri, 15 May 2009 08:22:56 -0400 X-BigFish: VPS3(zzzz1202hzzz32i43j64h) X-Spam-TCS-SCL: 3:0 X-WSS-ID: 0KJOQDV-01-0C4-01 From: Borislav Petkov To: , , CC: , , , , , edt@aei.ca, , Doug Thompson , Borislav Petkov Subject: [PATCH 13/22] amd64_edac: add k8-specific methods Date: Fri, 15 May 2009 14:22:24 +0200 Message-ID: <1242390153-24493-14-git-send-email-borislav.petkov@amd.com> X-Mailer: git-send-email 1.6.2.4 In-Reply-To: <1242390153-24493-1-git-send-email-borislav.petkov@amd.com> References: <1242390153-24493-1-git-send-email-borislav.petkov@amd.com> X-OriginalArrivalTime: 15 May 2009 12:22:46.0556 (UTC) FILETIME=[DABE85C0:01C9D557] MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Doug Thompson Borislav: - fix/cleanup/move comments - fix function return value patterns - cleanup debug calls Reviewed-by: Mauro Carvalho Chehab Signed-off-by: Doug Thompson Signed-off-by: Borislav Petkov --- drivers/edac/amd64_edac.c | 173 +++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 173 insertions(+), 0 deletions(-) diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c index 5ec44a4..24c031f 100644 --- a/drivers/edac/amd64_edac.c +++ b/drivers/edac/amd64_edac.c @@ -1013,3 +1013,176 @@ static enum mem_type amd64_determine_memory_type(struct amd64_pvt *pvt) return type; } +/* + * Read the DRAM Configuration Low register. It differs between CG, D & E revs + * and the later RevF memory controllers (DDR vs DDR2) + * + * Return: + * number of memory channels in operation + * Pass back: + * contents of the DCL0_LOW register + */ +static int k8_early_channel_count(struct amd64_pvt *pvt) +{ + int flag, err = 0; + + err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCLR_0, &pvt->dclr0); + if (err) + return err; + + if ((boot_cpu_data.x86_model >> 4) >= OPTERON_CPU_REV_F) { + /* RevF (NPT) and later */ + flag = pvt->dclr0 & F10_WIDTH_128; + } else { + /* RevE and earlier */ + flag = pvt->dclr0 & REVE_WIDTH_128; + } + + /* not used */ + pvt->dclr1 = 0; + + return (flag) ? 2 : 1; +} + +/* extract the ERROR ADDRESS for the K8 CPUs */ +static u64 k8_get_error_address(struct mem_ctl_info *mci, + struct amd64_error_info_regs *info) +{ + return (((u64) (info->nbeah & 0xff)) << 32) + + (info->nbeal & ~0x03); +} + +/* + * Read the Base and Limit registers for K8 based Memory controllers; extract + * fields from the 'raw' reg into separate data fields + * + * Isolates: BASE, LIMIT, IntlvEn, IntlvSel, RW_EN + */ +static void k8_read_dram_base_limit(struct amd64_pvt *pvt, int dram) +{ + u32 low; + u32 off = dram << 3; /* 8 bytes between DRAM entries */ + int err; + + err = pci_read_config_dword(pvt->addr_f1_ctl, + K8_DRAM_BASE_LOW + off, &low); + if (err) + debugf0("Reading K8_DRAM_BASE_LOW failed\n"); + + /* Extract parts into separate data entries */ + pvt->dram_base[dram] = ((u64) low & 0xFFFF0000) << 8; + pvt->dram_IntlvEn[dram] = (low >> 8) & 0x7; + pvt->dram_rw_en[dram] = (low & 0x3); + + err = pci_read_config_dword(pvt->addr_f1_ctl, + K8_DRAM_LIMIT_LOW + off, &low); + if (err) + debugf0("Reading K8_DRAM_LIMIT_LOW failed\n"); + + /* + * Extract parts into separate data entries. Limit is the HIGHEST memory + * location of the region, so lower 24 bits need to be all ones + */ + pvt->dram_limit[dram] = (((u64) low & 0xFFFF0000) << 8) | 0x00FFFFFF; + pvt->dram_IntlvSel[dram] = (low >> 8) & 0x7; + pvt->dram_DstNode[dram] = (low & 0x7); +} + +static void k8_map_sysaddr_to_csrow(struct mem_ctl_info *mci, + struct amd64_error_info_regs *info, + u64 SystemAddress) +{ + struct mem_ctl_info *src_mci; + unsigned short syndrome; + int channel, csrow; + u32 page, offset; + + /* Extract the syndrome parts and form a 16-bit syndrome */ + syndrome = EXTRACT_HIGH_SYNDROME(info->nbsl) << 8; + syndrome |= EXTRACT_LOW_SYNDROME(info->nbsh); + + /* CHIPKILL enabled */ + if (info->nbcfg & K8_NBCFG_CHIPKILL) { + channel = get_channel_from_ecc_syndrome(syndrome); + if (channel < 0) { + /* + * Syndrome didn't map, so we don't know which of the + * 2 DIMMs is in error. So we need to ID 'both' of them + * as suspect. + */ + amd64_mc_printk(mci, KERN_WARNING, + "unknown syndrome 0x%x - possible error " + "reporting race\n", syndrome); + edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR); + return; + } + } else { + /* + * non-chipkill ecc mode + * + * The k8 documentation is unclear about how to determine the + * channel number when using non-chipkill memory. This method + * was obtained from email communication with someone at AMD. + * (Wish the email was placed in this comment - norsk) + */ + channel = ((SystemAddress & BIT(3)) != 0); + } + + /* + * Find out which node the error address belongs to. This may be + * different from the node that detected the error. + */ + src_mci = find_mc_by_sys_addr(mci, SystemAddress); + if (src_mci) { + amd64_mc_printk(mci, KERN_ERR, + "failed to map error address 0x%lx to a node\n", + (unsigned long)SystemAddress); + edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR); + return; + } + + /* Now map the SystemAddress to a CSROW */ + csrow = sys_addr_to_csrow(src_mci, SystemAddress); + if (csrow < 0) { + edac_mc_handle_ce_no_info(src_mci, EDAC_MOD_STR); + } else { + error_address_to_page_and_offset(SystemAddress, &page, &offset); + + edac_mc_handle_ce(src_mci, page, offset, syndrome, csrow, + channel, EDAC_MOD_STR); + } +} + +/* + * determrine the number of PAGES in for this DIMM's size based on its DRAM + * Address Mapping. + * + * First step is to calc the number of bits to shift a value of 1 left to + * indicate show many pages. Start with the DBAM value as the starting bits, + * then proceed to adjust those shift bits, based on CPU rev and the table. + * See BKDG on the DBAM + */ +static int k8_dbam_map_to_pages(struct amd64_pvt *pvt, int dram_map) +{ + int nr_pages; + + if (pvt->ext_model >= OPTERON_CPU_REV_F) { + nr_pages = 1 << (revf_quad_ddr2_shift[dram_map] - PAGE_SHIFT); + } else { + /* + * RevE and less section; this line is tricky. It collapses the + * table used by RevD and later to one that matches revisions CG + * and earlier. + */ + dram_map -= (pvt->ext_model >= OPTERON_CPU_REV_D) ? + (dram_map > 8 ? 4 : (dram_map > 5 ? + 3 : (dram_map > 2 ? 1 : 0))) : 0; + + /* 25 shift is 32MiB minimum DIMM size in RevE and prior */ + nr_pages = 1 << (dram_map + 25 - PAGE_SHIFT); + } + + return nr_pages; +} + + -- 1.6.2.4