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bh=Y9FXKmqyesmiQqWT1Pfd+FqM5Z7D+OH329eg/fLNhB4=; b=sqtdYCi/uh95jnecTYlEt6XDB51PjdgWFTcy+vBgjNzBJ7ekxp03U9SeUin/bZgLZE 2RjcMJBOje3m5T25jAmfX+Jl4Q8+37YpHBUxZ/afw9ojyXosKvmKd+dqnj4rHaYAMw7D fJ4gbsfCs6Ok41Egp2QUwPMFpFUHs0+l/s3cLyC6/vXBfB2x4U8w6wVCiFKfzCpIVlPI pttdas2jKe4omNSPMHEY1qvVeKXJ3+2nGgB+v30mUVnfPTorjVoFDL+ANwsibXcNoYYx HJ0acawQ7bWU0vTPBobpHKw3wXcfnrDP2hqKUqu/Q0Ec1BpDdmiuW9ODGC8dB39KiIRj Vtjg== X-Gm-Message-State: AOAM531goZhJI5nhOM0RdNFsyY5s2HK3yQwQtqIVUALj/Zfm8eqXPWLJ Ws4KjrAel+Qugp4Qiq8E23Dqmw== X-Google-Smtp-Source: ABdhPJzI+S6ukmQQ+R/ravYO3K1ZogEokzd2Ho+ltsG1vwtSKBXC2VvVnG/BUHQ8ssrGYRILJropCw== X-Received: by 2002:a63:ed0b:: with SMTP id d11mr19559963pgi.261.1606770729561; Mon, 30 Nov 2020 13:12:09 -0800 (PST) Received: from stbsrv-and-01.and.broadcom.net ([192.19.231.250]) by smtp.gmail.com with ESMTPSA id m7sm18320441pfh.72.2020.11.30.13.12.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Nov 2020 13:12:08 -0800 (PST) From: Jim Quinlan To: linux-pci@vger.kernel.org, Nicolas Saenz Julienne , broonie@kernel.org, bcm-kernel-feedback-list@broadcom.com, james.quinlan@broadcom.com Subject: [PATCH v2 5/6] PCI: brcmstb: Add panic/die handler to RC driver Date: Mon, 30 Nov 2020 16:11:42 -0500 Message-Id: <20201130211145.3012-6-james.quinlan@broadcom.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201130211145.3012-1-james.quinlan@broadcom.com> References: <20201130211145.3012-1-james.quinlan@broadcom.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201130_161211_897591_DF66A296 X-CRM114-Status: GOOD ( 18.91 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rob Herring , Lorenzo Pieralisi , open list , Florian Fainelli , "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" , Bjorn Helgaas , "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="===============3470053119583431700==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============3470053119583431700== Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="00000000000097f4d605b55976a5" --00000000000097f4d605b55976a5 Whereas most PCIe HW returns 0xffffffff on illegal accesses and the like, by default Broadcom's STB PCIe controller effects an abort. This simple handler determines if the PCIe controller was the cause of the abort and if so, prints out diagnostic info. Example output: brcm-pcie 8b20000.pcie: Error: Mem Acc: 32bit, Read, @0x38000000 brcm-pcie 8b20000.pcie: Type: TO=0 Abt=0 UnspReq=1 AccDsble=0 BadAddr=0 Signed-off-by: Jim Quinlan --- drivers/pci/controller/pcie-brcmstb.c | 124 ++++++++++++++++++++++++++ 1 file changed, 124 insertions(+) diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c index 989e4231d136..3983d6c80769 100644 --- a/drivers/pci/controller/pcie-brcmstb.c +++ b/drivers/pci/controller/pcie-brcmstb.c @@ -12,11 +12,13 @@ #include #include #include +#include #include #include #include #include #include +#include #include #include #include @@ -187,6 +189,39 @@ #define PCIE_DVT_PMU_PCIE_PHY_CTRL_DAST_PWRDN_MASK 0x1 #define PCIE_DVT_PMU_PCIE_PHY_CTRL_DAST_PWRDN_SHIFT 0x0 +/* Error report regiseters */ +#define PCIE_OUTB_ERR_TREAT 0x6000 +#define PCIE_OUTB_ERR_TREAT_CONFIG_MASK 0x1 +#define PCIE_OUTB_ERR_TREAT_MEM_MASK 0x2 +#define PCIE_OUTB_ERR_VALID 0x6004 +#define PCIE_OUTB_ERR_CLEAR 0x6008 +#define PCIE_OUTB_ERR_ACC_INFO 0x600c +#define PCIE_OUTB_ERR_ACC_INFO_CFG_ERR_MASK 0x01 +#define PCIE_OUTB_ERR_ACC_INFO_MEM_ERR_MASK 0x02 +#define PCIE_OUTB_ERR_ACC_INFO_TYPE_64_MASK 0x04 +#define PCIE_OUTB_ERR_ACC_INFO_DIR_WRITE_MASK 0x10 +#define PCIE_OUTB_ERR_ACC_INFO_BYTE_LANES_MASK 0xff00 +#define PCIE_OUTB_ERR_ACC_ADDR 0x6010 +#define PCIE_OUTB_ERR_ACC_ADDR_BUS_MASK 0xff00000 +#define PCIE_OUTB_ERR_ACC_ADDR_DEV_MASK 0xf8000 +#define PCIE_OUTB_ERR_ACC_ADDR_FUNC_MASK 0x7000 +#define PCIE_OUTB_ERR_ACC_ADDR_REG_MASK 0xfff +#define PCIE_OUTB_ERR_CFG_CAUSE 0x6014 +#define PCIE_OUTB_ERR_CFG_CAUSE_TIMEOUT_MASK 0x40 +#define PCIE_OUTB_ERR_CFG_CAUSE_ABORT_MASK 0x20 +#define PCIE_OUTB_ERR_CFG_CAUSE_UNSUPP_REQ_MASK 0x10 +#define PCIE_OUTB_ERR_CFG_CAUSE_ACC_TIMEOUT_MASK 0x4 +#define PCIE_OUTB_ERR_CFG_CAUSE_ACC_DISABLED_MASK 0x2 +#define PCIE_OUTB_ERR_CFG_CAUSE_ACC_64BIT__MASK 0x1 +#define PCIE_OUTB_ERR_MEM_ADDR_LO 0x6018 +#define PCIE_OUTB_ERR_MEM_ADDR_HI 0x601c +#define PCIE_OUTB_ERR_MEM_CAUSE 0x6020 +#define PCIE_OUTB_ERR_MEM_CAUSE_TIMEOUT_MASK 0x40 +#define PCIE_OUTB_ERR_MEM_CAUSE_ABORT_MASK 0x20 +#define PCIE_OUTB_ERR_MEM_CAUSE_UNSUPP_REQ_MASK 0x10 +#define PCIE_OUTB_ERR_MEM_CAUSE_ACC_DISABLED_MASK 0x2 +#define PCIE_OUTB_ERR_MEM_CAUSE_BAD_ADDR_MASK 0x1 + /* Forward declarations */ struct brcm_pcie; static inline void brcm_pcie_bridge_sw_init_set_7278(struct brcm_pcie *pcie, u32 val); @@ -221,6 +256,7 @@ struct pcie_cfg_data { const enum pcie_type type; void (*perst_set)(struct brcm_pcie *pcie, u32 val); void (*bridge_sw_init_set)(struct brcm_pcie *pcie, u32 val); + const bool has_err_report; }; static const int pcie_offsets[] = { @@ -261,6 +297,7 @@ static const struct pcie_cfg_data bcm7216_cfg = { .type = BCM7278, .perst_set = brcm_pcie_perst_set_7278, .bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_7278, + .has_err_report = true, }; struct brcm_msi { @@ -302,8 +339,89 @@ struct brcm_pcie { void (*bridge_sw_init_set)(struct brcm_pcie *pcie, u32 val); struct regulator_bulk_data supplies[ARRAY_SIZE(ep_regulator_names)]; bool ep_wakeup_capable; + bool has_err_report; + struct notifier_block die_notifier; }; +/* + * Dump out pcie errors on die or panic. + */ +static int dump_pcie_error(struct notifier_block *self, unsigned long v, void *p) +{ + const struct brcm_pcie *pcie = container_of(self, struct brcm_pcie, die_notifier); + void __iomem *base = pcie->base; + int i, is_cfg_err, is_mem_err, lanes; + char *width_str, *direction_str, lanes_str[9]; + u32 info; + + if (readl(base + PCIE_OUTB_ERR_VALID) == 0) + return NOTIFY_DONE; + info = readl(base + PCIE_OUTB_ERR_ACC_INFO); + + + is_cfg_err = !!(info & PCIE_OUTB_ERR_ACC_INFO_CFG_ERR_MASK); + is_mem_err = !!(info & PCIE_OUTB_ERR_ACC_INFO_MEM_ERR_MASK); + width_str = (info & PCIE_OUTB_ERR_ACC_INFO_TYPE_64_MASK) ? "64bit" : "32bit"; + direction_str = (info & PCIE_OUTB_ERR_ACC_INFO_DIR_WRITE_MASK) ? "Write" : "Read"; + lanes = FIELD_GET(PCIE_OUTB_ERR_ACC_INFO_BYTE_LANES_MASK, info); + for (i = 0, lanes_str[8] = 0; i < 8; i++) + lanes_str[i] = (lanes & (1 << i)) ? '1' : '0'; + + if (is_cfg_err) { + u32 cfg_addr = readl(base + PCIE_OUTB_ERR_ACC_ADDR); + u32 cause = readl(base + PCIE_OUTB_ERR_CFG_CAUSE); + int bus = FIELD_GET(PCIE_OUTB_ERR_ACC_ADDR_BUS_MASK, cfg_addr); + int dev = FIELD_GET(PCIE_OUTB_ERR_ACC_ADDR_DEV_MASK, cfg_addr); + int func = FIELD_GET(PCIE_OUTB_ERR_ACC_ADDR_FUNC_MASK, cfg_addr); + int reg = FIELD_GET(PCIE_OUTB_ERR_ACC_ADDR_REG_MASK, cfg_addr); + + dev_err(pcie->dev, "Error: CFG Acc, %s, %s, Bus=%d, Dev=%d, Fun=%d, Reg=0x%x, lanes=%s\n", + width_str, direction_str, bus, dev, func, reg, lanes_str); + dev_err(pcie->dev, " Type: TO=%d Abt=%d UnsupReq=%d AccTO=%d AccDsbld=%d Acc64bit=%d\n", + !!(cause & PCIE_OUTB_ERR_CFG_CAUSE_TIMEOUT_MASK), + !!(cause & PCIE_OUTB_ERR_CFG_CAUSE_ABORT_MASK), + !!(cause & PCIE_OUTB_ERR_CFG_CAUSE_UNSUPP_REQ_MASK), + !!(cause & PCIE_OUTB_ERR_CFG_CAUSE_ACC_TIMEOUT_MASK), + !!(cause & PCIE_OUTB_ERR_CFG_CAUSE_ACC_DISABLED_MASK), + !!(cause & PCIE_OUTB_ERR_CFG_CAUSE_ACC_64BIT__MASK)); + } + + if (is_mem_err) { + u32 cause = readl(base + PCIE_OUTB_ERR_MEM_CAUSE); + u32 lo = readl(base + PCIE_OUTB_ERR_MEM_ADDR_LO); + u32 hi = readl(base + PCIE_OUTB_ERR_MEM_ADDR_HI); + u64 addr = ((u64)hi << 32) | (u64)lo; + + dev_err(pcie->dev, "Error: Mem Acc, %s, %s, @0x%llx, lanes=%s\n", + width_str, direction_str, addr, lanes_str); + dev_err(pcie->dev, " Type: TO=%d Abt=%d UnsupReq=%d AccDsble=%d BadAddr=%d\n", + !!(cause & PCIE_OUTB_ERR_MEM_CAUSE_TIMEOUT_MASK), + !!(cause & PCIE_OUTB_ERR_MEM_CAUSE_ABORT_MASK), + !!(cause & PCIE_OUTB_ERR_MEM_CAUSE_UNSUPP_REQ_MASK), + !!(cause & PCIE_OUTB_ERR_MEM_CAUSE_ACC_DISABLED_MASK), + !!(cause & PCIE_OUTB_ERR_MEM_CAUSE_BAD_ADDR_MASK)); + } + + /* Clear the error */ + writel(1, base + PCIE_OUTB_ERR_CLEAR); + + return NOTIFY_DONE; +} + +static void brcm_register_die_notifiers(struct brcm_pcie *pcie) +{ + pcie->die_notifier.notifier_call = dump_pcie_error; + register_die_notifier(&pcie->die_notifier); + atomic_notifier_chain_register(&panic_notifier_list, &pcie->die_notifier); +} + +static void brcm_unregister_die_notifiers(struct brcm_pcie *pcie) +{ + unregister_die_notifier(&pcie->die_notifier); + atomic_notifier_chain_unregister(&panic_notifier_list, &pcie->die_notifier); + pcie->die_notifier.notifier_call = NULL; +} + static int pci_dev_may_wakeup(struct pci_dev *dev, void *data) { bool *ret = data; @@ -1273,6 +1391,8 @@ static int brcm_pcie_remove(struct platform_device *pdev) struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie); pci_stop_root_bus(bridge->bus); + if (pcie->has_err_report) + brcm_unregister_die_notifiers(pcie); pci_remove_root_bus(bridge->bus); __brcm_pcie_remove(pcie); @@ -1311,6 +1431,7 @@ static int brcm_pcie_probe(struct platform_device *pdev) pcie->np = np; pcie->reg_offsets = data->offsets; pcie->type = data->type; + pcie->has_err_report = data->has_err_report; pcie->perst_set = data->perst_set; pcie->bridge_sw_init_set = data->bridge_sw_init_set; @@ -1380,6 +1501,9 @@ static int brcm_pcie_probe(struct platform_device *pdev) platform_set_drvdata(pdev, pcie); + if (pcie->has_err_report) + brcm_register_die_notifiers(pcie); + return pci_host_probe(bridge); fail: __brcm_pcie_remove(pcie); -- 2.17.1 --00000000000097f4d605b55976a5 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQQwYJKoZIhvcNAQcCoIIQNDCCEDACAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg gg2YMIIE6DCCA9CgAwIBAgIOSBtqCRO9gCTKXSLwFPMwDQYJKoZIhvcNAQELBQAwTDEgMB4GA1UE CxMXR2xvYmFsU2lnbiBSb290IENBIC0gUjMxEzARBgNVBAoTCkdsb2JhbFNpZ24xEzARBgNVBAMT Ckdsb2JhbFNpZ24wHhcNMTYwNjE1MDAwMDAwWhcNMjQwNjE1MDAwMDAwWjBdMQswCQYDVQQGEwJC RTEZMBcGA1UEChMQR2xvYmFsU2lnbiBudi1zYTEzMDEGA1UEAxMqR2xvYmFsU2lnbiBQZXJzb25h bFNpZ24gMiBDQSAtIFNIQTI1NiAtIEczMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA tpZok2X9LAHsYqMNVL+Ly6RDkaKar7GD8rVtb9nw6tzPFnvXGeOEA4X5xh9wjx9sScVpGR5wkTg1 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