From fab4c256a58bcd6877bca5b6afc97afa3b6664ac Mon Sep 17 00:00:00 2001 From: Borislav Petkov Date: Fri, 13 Dec 2013 14:39:56 -0700 Subject: PCI/AER: Add a TLP header print helper ... and call it instead of duplicating the large printk format statement. No functionality change. Signed-off-by: Borislav Petkov Signed-off-by: Bjorn Helgaas --- drivers/pci/pcie/aer/aerdrv_errprint.c | 44 ++++++++++++++++------------------ 1 file changed, 21 insertions(+), 23 deletions(-) (limited to 'drivers/pci/pcie') diff --git a/drivers/pci/pcie/aer/aerdrv_errprint.c b/drivers/pci/pcie/aer/aerdrv_errprint.c index 2c7c9f5f592..32efc5e0d2e 100644 --- a/drivers/pci/pcie/aer/aerdrv_errprint.c +++ b/drivers/pci/pcie/aer/aerdrv_errprint.c @@ -124,6 +124,21 @@ static const char *aer_agent_string[] = { "Transmitter ID" }; +static void __print_tlp_header(struct pci_dev *dev, + struct aer_header_log_regs *t) +{ + unsigned char *tlp = (unsigned char *)&t; + + dev_err(&dev->dev, " TLP Header:" + " %02x%02x%02x%02x %02x%02x%02x%02x" + " %02x%02x%02x%02x %02x%02x%02x%02x\n", + *(tlp + 3), *(tlp + 2), *(tlp + 1), *tlp, + *(tlp + 7), *(tlp + 6), *(tlp + 5), *(tlp + 4), + *(tlp + 11), *(tlp + 10), *(tlp + 9), + *(tlp + 8), *(tlp + 15), *(tlp + 14), + *(tlp + 13), *(tlp + 12)); +} + static void __aer_print_error(struct pci_dev *dev, struct aer_err_info *info) { @@ -178,17 +193,8 @@ void aer_print_error(struct pci_dev *dev, struct aer_err_info *info) __aer_print_error(dev, info); - if (info->tlp_header_valid) { - unsigned char *tlp = (unsigned char *) &info->tlp; - dev_err(&dev->dev, " TLP Header:" - " %02x%02x%02x%02x %02x%02x%02x%02x" - " %02x%02x%02x%02x %02x%02x%02x%02x\n", - *(tlp + 3), *(tlp + 2), *(tlp + 1), *tlp, - *(tlp + 7), *(tlp + 6), *(tlp + 5), *(tlp + 4), - *(tlp + 11), *(tlp + 10), *(tlp + 9), - *(tlp + 8), *(tlp + 15), *(tlp + 14), - *(tlp + 13), *(tlp + 12)); - } + if (info->tlp_header_valid) + __print_tlp_header(dev, &info->tlp); } if (info->id && info->error_dev_num > 1 && info->id == id) @@ -250,18 +256,10 @@ void cper_print_aer(struct pci_dev *dev, int cper_severity, if (aer_severity != AER_CORRECTABLE) dev_err(&dev->dev, "aer_uncor_severity: 0x%08x\n", aer->uncor_severity); - if (tlp_header_valid) { - const unsigned char *tlp; - tlp = (const unsigned char *)&aer->header_log; - dev_err(&dev->dev, "aer_tlp_header:" - " %02x%02x%02x%02x %02x%02x%02x%02x" - " %02x%02x%02x%02x %02x%02x%02x%02x\n", - *(tlp + 3), *(tlp + 2), *(tlp + 1), *tlp, - *(tlp + 7), *(tlp + 6), *(tlp + 5), *(tlp + 4), - *(tlp + 11), *(tlp + 10), *(tlp + 9), - *(tlp + 8), *(tlp + 15), *(tlp + 14), - *(tlp + 13), *(tlp + 12)); - } + + if (tlp_header_valid) + __print_tlp_header(dev, &aer->header_log); + trace_aer_event(dev_name(&dev->dev), (status & ~mask), aer_severity); } -- cgit v1.2.3-70-g09d2 From 1c38108a086f1cca3700765607059a6d865910c2 Mon Sep 17 00:00:00 2001 From: Borislav Petkov Date: Fri, 13 Dec 2013 14:40:03 -0700 Subject: PCI/AER: Clean up error printing code a bit Save one indentation level in aer_print_error() for the generic case where we have info->status of an error, disregard 80 cols rule a bit for the sake of better readability, fix alignment. No functionality change. Signed-off-by: Borislav Petkov Signed-off-by: Bjorn Helgaas --- drivers/pci/pcie/aer/aerdrv_errprint.c | 51 ++++++++++++++++++---------------- 1 file changed, 27 insertions(+), 24 deletions(-) (limited to 'drivers/pci/pcie') diff --git a/drivers/pci/pcie/aer/aerdrv_errprint.c b/drivers/pci/pcie/aer/aerdrv_errprint.c index 32efc5e0d2e..34ff7026440 100644 --- a/drivers/pci/pcie/aer/aerdrv_errprint.c +++ b/drivers/pci/pcie/aer/aerdrv_errprint.c @@ -168,39 +168,39 @@ static void __aer_print_error(struct pci_dev *dev, void aer_print_error(struct pci_dev *dev, struct aer_err_info *info) { + int layer, agent; int id = ((dev->bus->number << 8) | dev->devfn); - if (info->status == 0) { + if (!info->status) { dev_err(&dev->dev, "PCIe Bus Error: severity=%s, type=Unaccessible, " "id=%04x(Unregistered Agent ID)\n", aer_error_severity_string[info->severity], id); - } else { - int layer, agent; + goto out; + } - layer = AER_GET_LAYER_ERROR(info->severity, info->status); - agent = AER_GET_AGENT(info->severity, info->status); + layer = AER_GET_LAYER_ERROR(info->severity, info->status); + agent = AER_GET_AGENT(info->severity, info->status); - dev_err(&dev->dev, - "PCIe Bus Error: severity=%s, type=%s, id=%04x(%s)\n", - aer_error_severity_string[info->severity], - aer_error_layer[layer], id, aer_agent_string[agent]); + dev_err(&dev->dev, + "PCIe Bus Error: severity=%s, type=%s, id=%04x(%s)\n", + aer_error_severity_string[info->severity], + aer_error_layer[layer], id, aer_agent_string[agent]); - dev_err(&dev->dev, - " device [%04x:%04x] error status/mask=%08x/%08x\n", - dev->vendor, dev->device, - info->status, info->mask); + dev_err(&dev->dev, + " device [%04x:%04x] error status/mask=%08x/%08x\n", + dev->vendor, dev->device, + info->status, info->mask); - __aer_print_error(dev, info); + __aer_print_error(dev, info); - if (info->tlp_header_valid) - __print_tlp_header(dev, &info->tlp); - } + if (info->tlp_header_valid) + __print_tlp_header(dev, &info->tlp); +out: if (info->id && info->error_dev_num > 1 && info->id == id) - dev_err(&dev->dev, - " Error of this Agent(%04x) is reported first\n", - id); + dev_err(&dev->dev, " Error of this Agent(%04x) is reported first\n", id); + trace_aer_event(dev_name(&dev->dev), (info->status & ~info->mask), info->severity); } @@ -234,6 +234,7 @@ void cper_print_aer(struct pci_dev *dev, int cper_severity, const char **status_strs; aer_severity = cper_severity_to_aer(cper_severity); + if (aer_severity == AER_CORRECTABLE) { status = aer->cor_status; mask = aer->cor_mask; @@ -246,16 +247,18 @@ void cper_print_aer(struct pci_dev *dev, int cper_severity, status_strs_size = ARRAY_SIZE(aer_uncorrectable_error_string); tlp_header_valid = status & AER_LOG_TLP_MASKS; } + layer = AER_GET_LAYER_ERROR(aer_severity, status); agent = AER_GET_AGENT(aer_severity, status); - dev_err(&dev->dev, "aer_status: 0x%08x, aer_mask: 0x%08x\n", - status, mask); + + dev_err(&dev->dev, "aer_status: 0x%08x, aer_mask: 0x%08x\n", status, mask); cper_print_bits("", status, status_strs, status_strs_size); dev_err(&dev->dev, "aer_layer=%s, aer_agent=%s\n", - aer_error_layer[layer], aer_agent_string[agent]); + aer_error_layer[layer], aer_agent_string[agent]); + if (aer_severity != AER_CORRECTABLE) dev_err(&dev->dev, "aer_uncor_severity: 0x%08x\n", - aer->uncor_severity); + aer->uncor_severity); if (tlp_header_valid) __print_tlp_header(dev, &aer->header_log); -- cgit v1.2.3-70-g09d2 From 8e7f8d0b30d4e3e30007b10eb2916d970b5f8c93 Mon Sep 17 00:00:00 2001 From: Betty Dall Date: Fri, 13 Dec 2013 08:23:16 -0700 Subject: PCI/AER: Ignore non-PCIe AER error sources in aer_hest_parse() aer_set_firmware_first() searches the HEST for an error source descriptor matching the specified PCI device. It uses the apei_hest_parse() iterator to call aer_hest_parse() for every descriptor in the HEST. Previously, aer_hest_parse() incorrectly assumed every descriptor was for a PCIe error source. This patch adds a check to avoid that error. [bhelgaas: factor check into helper, use in aer_hest_parse_aff(), changelog] Signed-off-by: Betty Dall Signed-off-by: Bjorn Helgaas --- drivers/pci/pcie/aer/aerdrv_acpi.c | 25 +++++++++++++++++-------- 1 file changed, 17 insertions(+), 8 deletions(-) (limited to 'drivers/pci/pcie') diff --git a/drivers/pci/pcie/aer/aerdrv_acpi.c b/drivers/pci/pcie/aer/aerdrv_acpi.c index cf611ab2193..a23995749f1 100644 --- a/drivers/pci/pcie/aer/aerdrv_acpi.c +++ b/drivers/pci/pcie/aer/aerdrv_acpi.c @@ -50,12 +50,24 @@ struct aer_hest_parse_info { int firmware_first; }; +static int hest_source_is_pcie_aer(struct acpi_hest_header *hest_hdr) +{ + if (hest_hdr->type == ACPI_HEST_TYPE_AER_ROOT_PORT || + hest_hdr->type == ACPI_HEST_TYPE_AER_ENDPOINT || + hest_hdr->type == ACPI_HEST_TYPE_AER_BRIDGE) + return 1; + return 0; +} + static int aer_hest_parse(struct acpi_hest_header *hest_hdr, void *data) { struct aer_hest_parse_info *info = data; struct acpi_hest_aer_common *p; int ff; + if (!hest_source_is_pcie_aer(hest_hdr)) + return 0; + p = (struct acpi_hest_aer_common *)(hest_hdr + 1); ff = !!(p->flags & ACPI_HEST_FIRMWARE_FIRST); if (p->flags & ACPI_HEST_GLOBAL) { @@ -104,15 +116,12 @@ static int aer_hest_parse_aff(struct acpi_hest_header *hest_hdr, void *data) if (aer_firmware_first) return 0; - switch (hest_hdr->type) { - case ACPI_HEST_TYPE_AER_ROOT_PORT: - case ACPI_HEST_TYPE_AER_ENDPOINT: - case ACPI_HEST_TYPE_AER_BRIDGE: - p = (struct acpi_hest_aer_common *)(hest_hdr + 1); - aer_firmware_first = !!(p->flags & ACPI_HEST_FIRMWARE_FIRST); - default: + if (!hest_source_is_pcie_aer(hest_hdr)) return 0; - } + + p = (struct acpi_hest_aer_common *)(hest_hdr + 1); + aer_firmware_first = !!(p->flags & ACPI_HEST_FIRMWARE_FIRST); + return 0; } /** -- cgit v1.2.3-70-g09d2 From 3620437a73b0ba68bac9c4e8d0fc9b809efca521 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Fri, 13 Dec 2013 15:42:53 -0700 Subject: PCI/AER: Consolidate HEST error source parsers aer_hest_parse() and aer_hest_parse_aff() are almost identical. We use aer_hest_parse() to check the ACPI_HEST_FIRMWARE_FIRST flag for a specific device, and we use aer_hest_parse_aff() to check to see if any device sets the flag. This drops aer_hest_parse_aff() and enhances aer_hest_parse() so it collects the union of the PCIe ACPI_HEST_FIRMWARE_FIRST flag settings when no specific device is supplied. No functional change. Signed-off-by: Bjorn Helgaas Reviewed-by: Betty Dall --- drivers/pci/pcie/aer/aerdrv_acpi.c | 33 +++++++++++++++++---------------- 1 file changed, 17 insertions(+), 16 deletions(-) (limited to 'drivers/pci/pcie') diff --git a/drivers/pci/pcie/aer/aerdrv_acpi.c b/drivers/pci/pcie/aer/aerdrv_acpi.c index a23995749f1..4d6991794fa 100644 --- a/drivers/pci/pcie/aer/aerdrv_acpi.c +++ b/drivers/pci/pcie/aer/aerdrv_acpi.c @@ -70,6 +70,17 @@ static int aer_hest_parse(struct acpi_hest_header *hest_hdr, void *data) p = (struct acpi_hest_aer_common *)(hest_hdr + 1); ff = !!(p->flags & ACPI_HEST_FIRMWARE_FIRST); + + /* + * If no specific device is supplied, determine whether + * FIRMWARE_FIRST is set for *any* PCIe device. + */ + if (!info->pci_dev) { + info->firmware_first |= ff; + return 0; + } + + /* Otherwise, check the specific device */ if (p->flags & ACPI_HEST_GLOBAL) { if (hest_match_type(hest_hdr, info->pci_dev)) info->firmware_first = ff; @@ -109,30 +120,20 @@ int pcie_aer_get_firmware_first(struct pci_dev *dev) static bool aer_firmware_first; -static int aer_hest_parse_aff(struct acpi_hest_header *hest_hdr, void *data) -{ - struct acpi_hest_aer_common *p; - - if (aer_firmware_first) - return 0; - - if (!hest_source_is_pcie_aer(hest_hdr)) - return 0; - - p = (struct acpi_hest_aer_common *)(hest_hdr + 1); - aer_firmware_first = !!(p->flags & ACPI_HEST_FIRMWARE_FIRST); - return 0; -} - /** * aer_acpi_firmware_first - Check if APEI should control AER. */ bool aer_acpi_firmware_first(void) { static bool parsed = false; + struct aer_hest_parse_info info = { + .pci_dev = NULL, /* Check all PCIe devices */ + .firmware_first = 0, + }; if (!parsed) { - apei_hest_parse(aer_hest_parse_aff, NULL); + apei_hest_parse(aer_hest_parse, &info); + aer_firmware_first = info.firmware_first; parsed = true; } return aer_firmware_first; -- cgit v1.2.3-70-g09d2