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Fri, 12 Jul 2019 15:49:14 +1200 Received: from chrisp-dl.ws.atlnz.lc (chrisp-dl.ws.atlnz.lc [10.33.22.30]) by smtp (Postfix) with ESMTP id 20ACE13EF9D; Fri, 12 Jul 2019 15:49:16 +1200 (NZST) Received: by chrisp-dl.ws.atlnz.lc (Postfix, from userid 1030) id 585901E1D7A; Fri, 12 Jul 2019 15:49:14 +1200 (NZST) From: Chris Packham To: bp@alien8.de, robh+dt@kernel.org, mark.rutland@arm.com, linux@armlinux.org.uk, patches@armlinux.org.uk, mchehab@kernel.org, james.morse@arm.com, jlu@pengutronix.de Subject: [PATCH v9 7/8] EDAC: Add driver for the Marvell Armada XP SDRAM and L2 cache ECC Date: Fri, 12 Jul 2019 15:49:03 +1200 Message-Id: <20190712034904.5747-8-chris.packham@alliedtelesis.co.nz> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190712034904.5747-1-chris.packham@alliedtelesis.co.nz> References: <20190712034904.5747-1-chris.packham@alliedtelesis.co.nz> MIME-Version: 1.0 x-atlnz-ls: pat X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190711_204927_897067_F935F12A X-CRM114-Status: GOOD ( 17.81 ) 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: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Chris Packham , Borislav Petkov , linux-arm-kernel@lists.infradead.org, linux-edac@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Jan Luebbe Add support for the ECC functionality as found in the DDR RAM and L2 cache controllers on the MV78230/MV78x60 SoCs. This driver has been tested on the MV78460 (on a custom board with a DDR3 ECC DIMM). Signed-off-by: Jan Luebbe [cp use SPDX license] Signed-off-by: Chris Packham Reviewed-by: Borislav Petkov --- MAINTAINERS | 6 + drivers/edac/Kconfig | 7 + drivers/edac/Makefile | 1 + drivers/edac/armada_xp_edac.c | 630 ++++++++++++++++++++++++++++++++++ 4 files changed, 644 insertions(+) create mode 100644 drivers/edac/armada_xp_edac.c diff --git a/MAINTAINERS b/MAINTAINERS index 618e4979960b..d6cf0771c998 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -5697,6 +5697,12 @@ L: linux-edac@vger.kernel.org S: Maintained F: drivers/edac/amd64_edac* +EDAC-ARMADA +M: Jan Luebbe +L: linux-edac@vger.kernel.org +S: Maintained +F: drivers/edac/armada_xp_* + EDAC-AST2500 M: Stefan Schaeckeler S: Supported diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig index 200c04ce5b0e..39c58b37b889 100644 --- a/drivers/edac/Kconfig +++ b/drivers/edac/Kconfig @@ -466,6 +466,13 @@ config EDAC_SIFIVE help Support for error detection and correction on the SiFive SoCs. +config EDAC_ARMADA_XP + bool "Marvell Armada XP DDR and L2 Cache ECC" + depends on MACH_MVEBU_V7 + help + Support for error correction and detection on the Marvell Aramada XP + DDR RAM and L2 cache controllers. + config EDAC_SYNOPSYS tristate "Synopsys DDR Memory Controller" depends on ARCH_ZYNQ || ARCH_ZYNQMP diff --git a/drivers/edac/Makefile b/drivers/edac/Makefile index 165ca65e1a3a..7b6348339a3b 100644 --- a/drivers/edac/Makefile +++ b/drivers/edac/Makefile @@ -80,6 +80,7 @@ obj-$(CONFIG_EDAC_THUNDERX) += thunderx_edac.o obj-$(CONFIG_EDAC_ALTERA) += altera_edac.o obj-$(CONFIG_EDAC_SIFIVE) += sifive_edac.o +obj-$(CONFIG_EDAC_ARMADA_XP) += armada_xp_edac.o obj-$(CONFIG_EDAC_SYNOPSYS) += synopsys_edac.o obj-$(CONFIG_EDAC_XGENE) += xgene_edac.o obj-$(CONFIG_EDAC_TI) += ti_edac.o diff --git a/drivers/edac/armada_xp_edac.c b/drivers/edac/armada_xp_edac.c new file mode 100644 index 000000000000..3759a4fbbdee --- /dev/null +++ b/drivers/edac/armada_xp_edac.c @@ -0,0 +1,630 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2017 Pengutronix, Jan Luebbe + */ + +#include +#include +#include + +#include +#include + +#include "edac_mc.h" +#include "edac_device.h" +#include "edac_module.h" + +/************************ EDAC MC (DDR RAM) ********************************/ + +#define SDRAM_NUM_CS 4 + +#define SDRAM_CONFIG_REG 0x0 +#define SDRAM_CONFIG_ECC_MASK BIT(18) +#define SDRAM_CONFIG_REGISTERED_MASK BIT(17) +#define SDRAM_CONFIG_BUS_WIDTH_MASK BIT(15) + +#define SDRAM_ADDR_CTRL_REG 0x10 +#define SDRAM_ADDR_CTRL_SIZE_HIGH_OFFSET(cs) (20+cs) +#define SDRAM_ADDR_CTRL_SIZE_HIGH_MASK(cs) (0x1 << SDRAM_ADDR_CTRL_SIZE_HIGH_OFFSET(cs)) +#define SDRAM_ADDR_CTRL_ADDR_SEL_MASK(cs) BIT(16+cs) +#define SDRAM_ADDR_CTRL_SIZE_LOW_OFFSET(cs) (cs*4+2) +#define SDRAM_ADDR_CTRL_SIZE_LOW_MASK(cs) (0x3 << SDRAM_ADDR_CTRL_SIZE_LOW_OFFSET(cs)) +#define SDRAM_ADDR_CTRL_STRUCT_OFFSET(cs) (cs*4) +#define SDRAM_ADDR_CTRL_STRUCT_MASK(cs) (0x3 << SDRAM_ADDR_CTRL_STRUCT_OFFSET(cs)) + +#define SDRAM_ERR_DATA_H_REG 0x40 +#define SDRAM_ERR_DATA_L_REG 0x44 + +#define SDRAM_ERR_RECV_ECC_REG 0x48 +#define SDRAM_ERR_RECV_ECC_VALUE_MASK 0xff + +#define SDRAM_ERR_CALC_ECC_REG 0x4c +#define SDRAM_ERR_CALC_ECC_ROW_OFFSET 8 +#define SDRAM_ERR_CALC_ECC_ROW_MASK (0xffff << SDRAM_ERR_CALC_ECC_ROW_OFFSET) +#define SDRAM_ERR_CALC_ECC_VALUE_MASK 0xff + +#define SDRAM_ERR_ADDR_REG 0x50 +#define SDRAM_ERR_ADDR_BANK_OFFSET 23 +#define SDRAM_ERR_ADDR_BANK_MASK (0x7 << SDRAM_ERR_ADDR_BANK_OFFSET) +#define SDRAM_ERR_ADDR_COL_OFFSET 8 +#define SDRAM_ERR_ADDR_COL_MASK (0x7fff << SDRAM_ERR_ADDR_COL_OFFSET) +#define SDRAM_ERR_ADDR_CS_OFFSET 1 +#define SDRAM_ERR_ADDR_CS_MASK (0x3 << SDRAM_ERR_ADDR_CS_OFFSET) +#define SDRAM_ERR_ADDR_TYPE_MASK BIT(0) + +#define SDRAM_ERR_CTRL_REG 0x54 +#define SDRAM_ERR_CTRL_THR_OFFSET 16 +#define SDRAM_ERR_CTRL_THR_MASK (0xff << SDRAM_ERR_CTRL_THR_OFFSET) +#define SDRAM_ERR_CTRL_PROP_MASK BIT(9) + +#define SDRAM_ERR_SBE_COUNT_REG 0x58 +#define SDRAM_ERR_DBE_COUNT_REG 0x5c + +#define SDRAM_ERR_CAUSE_ERR_REG 0xd0 +#define SDRAM_ERR_CAUSE_MSG_REG 0xd8 +#define SDRAM_ERR_CAUSE_DBE_MASK BIT(1) +#define SDRAM_ERR_CAUSE_SBE_MASK BIT(0) + +#define SDRAM_RANK_CTRL_REG 0x1e0 +#define SDRAM_RANK_CTRL_EXIST_MASK(cs) BIT(cs) + +struct axp_mc_drvdata { + void __iomem *base; + /* width in bytes */ + unsigned int width; + /* bank interleaving */ + bool cs_addr_sel[SDRAM_NUM_CS]; + + char msg[128]; +}; + +/* derived from "DRAM Address Multiplexing" in the ARAMDA XP Functional Spec */ +static uint32_t axp_mc_calc_address(struct axp_mc_drvdata *drvdata, + uint8_t cs, uint8_t bank, uint16_t row, + uint16_t col) +{ + if (drvdata->width == 8) { + /* 64 bit */ + if (drvdata->cs_addr_sel[cs]) + /* bank interleaved */ + return (((row & 0xfff8) << 16) | + ((bank & 0x7) << 16) | + ((row & 0x7) << 13) | + ((col & 0x3ff) << 3)); + else + return (((row & 0xffff << 16) | + ((bank & 0x7) << 13) | + ((col & 0x3ff)) << 3)); + } else if (drvdata->width == 4) { + /* 32 bit */ + if (drvdata->cs_addr_sel[cs]) + /* bank interleaved */ + return (((row & 0xfff0) << 15) | + ((bank & 0x7) << 16) | + ((row & 0xf) << 12) | + ((col & 0x3ff) << 2)); + else + return (((row & 0xffff << 15) | + ((bank & 0x7) << 12) | + ((col & 0x3ff)) << 2)); + } else { + /* 16 bit */ + if (drvdata->cs_addr_sel[cs]) + /* bank interleaved */ + return (((row & 0xffe0) << 14) | + ((bank & 0x7) << 16) | + ((row & 0x1f) << 11) | + ((col & 0x3ff) << 1)); + else + return (((row & 0xffff << 14) | + ((bank & 0x7) << 11) | + ((col & 0x3ff)) << 1)); + } +} + +static void axp_mc_check(struct mem_ctl_info *mci) +{ + struct axp_mc_drvdata *drvdata = mci->pvt_info; + uint32_t data_h, data_l, recv_ecc, calc_ecc, addr; + uint32_t cnt_sbe, cnt_dbe, cause_err, cause_msg; + uint32_t row_val, col_val, bank_val, addr_val; + uint8_t syndrome_val, cs_val; + char *msg = drvdata->msg; + + data_h = readl(drvdata->base + SDRAM_ERR_DATA_H_REG); + data_l = readl(drvdata->base + SDRAM_ERR_DATA_L_REG); + recv_ecc = readl(drvdata->base + SDRAM_ERR_RECV_ECC_REG); + calc_ecc = readl(drvdata->base + SDRAM_ERR_CALC_ECC_REG); + addr = readl(drvdata->base + SDRAM_ERR_ADDR_REG); + cnt_sbe = readl(drvdata->base + SDRAM_ERR_SBE_COUNT_REG); + cnt_dbe = readl(drvdata->base + SDRAM_ERR_DBE_COUNT_REG); + cause_err = readl(drvdata->base + SDRAM_ERR_CAUSE_ERR_REG); + cause_msg = readl(drvdata->base + SDRAM_ERR_CAUSE_MSG_REG); + + /* clear cause registers */ + writel(~(SDRAM_ERR_CAUSE_DBE_MASK | SDRAM_ERR_CAUSE_SBE_MASK), + drvdata->base + SDRAM_ERR_CAUSE_ERR_REG); + writel(~(SDRAM_ERR_CAUSE_DBE_MASK | SDRAM_ERR_CAUSE_SBE_MASK), + drvdata->base + SDRAM_ERR_CAUSE_MSG_REG); + + /* clear error counter registers */ + if (cnt_sbe) + writel(0, drvdata->base + SDRAM_ERR_SBE_COUNT_REG); + if (cnt_dbe) + writel(0, drvdata->base + SDRAM_ERR_DBE_COUNT_REG); + + if (!cnt_sbe && !cnt_dbe) + return; + + if (!(addr & SDRAM_ERR_ADDR_TYPE_MASK)) { + if (cnt_sbe) + cnt_sbe--; + else + dev_warn(mci->pdev, "inconsistent SBE count detected"); + } else { + if (cnt_dbe) + cnt_dbe--; + else + dev_warn(mci->pdev, "inconsistent DBE count detected"); + } + + /* report earlier errors */ + if (cnt_sbe) + edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, + cnt_sbe, /* error count */ + 0, 0, 0, /* pfn, offset, syndrome */ + -1, -1, -1, /* top, mid, low layer */ + mci->ctl_name, + "details unavailable (multiple errors)"); + if (cnt_dbe) + edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, + cnt_sbe, /* error count */ + 0, 0, 0, /* pfn, offset, syndrome */ + -1, -1, -1, /* top, mid, low layer */ + mci->ctl_name, + "details unavailable (multiple errors)"); + + /* report details for most recent error */ + cs_val = (addr & SDRAM_ERR_ADDR_CS_MASK) >> SDRAM_ERR_ADDR_CS_OFFSET; + bank_val = (addr & SDRAM_ERR_ADDR_BANK_MASK) >> SDRAM_ERR_ADDR_BANK_OFFSET; + row_val = (calc_ecc & SDRAM_ERR_CALC_ECC_ROW_MASK) >> SDRAM_ERR_CALC_ECC_ROW_OFFSET; + col_val = (addr & SDRAM_ERR_ADDR_COL_MASK) >> SDRAM_ERR_ADDR_COL_OFFSET; + syndrome_val = (recv_ecc ^ calc_ecc) & 0xff; + addr_val = axp_mc_calc_address(drvdata, cs_val, bank_val, row_val, + col_val); + msg += sprintf(msg, "row=0x%04x ", row_val); /* 11 chars */ + msg += sprintf(msg, "bank=0x%x ", bank_val); /* 9 chars */ + msg += sprintf(msg, "col=0x%04x ", col_val); /* 11 chars */ + msg += sprintf(msg, "cs=%d", cs_val); /* 4 chars */ + + if (!(addr & SDRAM_ERR_ADDR_TYPE_MASK)) { + edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, + 1, /* error count */ + addr_val >> PAGE_SHIFT, + addr_val & ~PAGE_MASK, + syndrome_val, + cs_val, -1, -1, /* top, mid, low layer */ + mci->ctl_name, drvdata->msg); + } else { + edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, + 1, /* error count */ + addr_val >> PAGE_SHIFT, + addr_val & ~PAGE_MASK, + syndrome_val, + cs_val, -1, -1, /* top, mid, low layer */ + mci->ctl_name, drvdata->msg); + } +} + +static void axp_mc_read_config(struct mem_ctl_info *mci) +{ + struct axp_mc_drvdata *drvdata = mci->pvt_info; + uint32_t config, addr_ctrl, rank_ctrl; + unsigned int i, cs_struct, cs_size; + struct dimm_info *dimm; + + config = readl(drvdata->base + SDRAM_CONFIG_REG); + if (config & SDRAM_CONFIG_BUS_WIDTH_MASK) + /* 64 bit */ + drvdata->width = 8; + else + /* 32 bit */ + drvdata->width = 4; + + addr_ctrl = readl(drvdata->base + SDRAM_ADDR_CTRL_REG); + rank_ctrl = readl(drvdata->base + SDRAM_RANK_CTRL_REG); + for (i = 0; i < SDRAM_NUM_CS; i++) { + dimm = mci->dimms[i]; + + if (!(rank_ctrl & SDRAM_RANK_CTRL_EXIST_MASK(i))) + continue; + + drvdata->cs_addr_sel[i] = + !!(addr_ctrl & SDRAM_ADDR_CTRL_ADDR_SEL_MASK(i)); + + cs_struct = (addr_ctrl & SDRAM_ADDR_CTRL_STRUCT_MASK(i)) >> SDRAM_ADDR_CTRL_STRUCT_OFFSET(i); + cs_size = ((addr_ctrl & SDRAM_ADDR_CTRL_SIZE_HIGH_MASK(i)) >> (SDRAM_ADDR_CTRL_SIZE_HIGH_OFFSET(i) - 2) | + ((addr_ctrl & SDRAM_ADDR_CTRL_SIZE_LOW_MASK(i)) >> SDRAM_ADDR_CTRL_SIZE_LOW_OFFSET(i))); + + switch (cs_size) { + case 0: /* 2GBit */ + dimm->nr_pages = 524288; + break; + case 1: /* 256MBit */ + dimm->nr_pages = 65536; + break; + case 2: /* 512MBit */ + dimm->nr_pages = 131072; + break; + case 3: /* 1GBit */ + dimm->nr_pages = 262144; + break; + case 4: /* 4GBit */ + dimm->nr_pages = 1048576; + break; + case 5: /* 8GBit */ + dimm->nr_pages = 2097152; + break; + } + dimm->grain = 8; + dimm->dtype = cs_struct ? DEV_X16 : DEV_X8; + dimm->mtype = (config & SDRAM_CONFIG_REGISTERED_MASK) ? + MEM_RDDR3 : MEM_DDR3; + dimm->edac_mode = EDAC_SECDED; + } +} + +static const struct of_device_id axp_mc_of_match[] = { + {.compatible = "marvell,armada-xp-sdram-controller",}, + {}, +}; +MODULE_DEVICE_TABLE(of, axp_mc_of_match); + +static int axp_mc_probe(struct platform_device *pdev) +{ + struct axp_mc_drvdata *drvdata; + struct edac_mc_layer layers[1]; + const struct of_device_id *id; + struct mem_ctl_info *mci; + struct resource *r; + void __iomem *base; + uint32_t config; + + r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!r) { + dev_err(&pdev->dev, "Unable to get mem resource\n"); + return -ENODEV; + } + + base = devm_ioremap_resource(&pdev->dev, r); + if (IS_ERR(base)) { + dev_err(&pdev->dev, "Unable to map regs\n"); + return PTR_ERR(base); + } + + config = readl(base + SDRAM_CONFIG_REG); + if (!(config & SDRAM_CONFIG_ECC_MASK)) { + dev_warn(&pdev->dev, "SDRAM ECC is not enabled"); + return -EINVAL; + } + + layers[0].type = EDAC_MC_LAYER_CHIP_SELECT; + layers[0].size = SDRAM_NUM_CS; + layers[0].is_virt_csrow = true; + + mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers, sizeof(*drvdata)); + if (!mci) + return -ENOMEM; + + drvdata = mci->pvt_info; + drvdata->base = base; + mci->pdev = &pdev->dev; + platform_set_drvdata(pdev, mci); + + id = of_match_device(axp_mc_of_match, &pdev->dev); + mci->edac_check = axp_mc_check; + mci->mtype_cap = MEM_FLAG_DDR3; + mci->edac_cap = EDAC_FLAG_SECDED; + mci->mod_name = pdev->dev.driver->name; + mci->ctl_name = id ? id->compatible : "unknown"; + mci->dev_name = dev_name(&pdev->dev); + mci->scrub_mode = SCRUB_NONE; + + axp_mc_read_config(mci); + + /* configure SBE threshold */ + /* it seems that SBEs are not captured otherwise */ + writel(1 << SDRAM_ERR_CTRL_THR_OFFSET, drvdata->base + SDRAM_ERR_CTRL_REG); + + /* clear cause registers */ + writel(~(SDRAM_ERR_CAUSE_DBE_MASK | SDRAM_ERR_CAUSE_SBE_MASK), drvdata->base + SDRAM_ERR_CAUSE_ERR_REG); + writel(~(SDRAM_ERR_CAUSE_DBE_MASK | SDRAM_ERR_CAUSE_SBE_MASK), drvdata->base + SDRAM_ERR_CAUSE_MSG_REG); + + /* clear counter registers */ + writel(0, drvdata->base + SDRAM_ERR_SBE_COUNT_REG); + writel(0, drvdata->base + SDRAM_ERR_DBE_COUNT_REG); + + if (edac_mc_add_mc(mci)) { + edac_mc_free(mci); + return -EINVAL; + } + edac_op_state = EDAC_OPSTATE_POLL; + + return 0; +} + +static int axp_mc_remove(struct platform_device *pdev) +{ + struct mem_ctl_info *mci = platform_get_drvdata(pdev); + + edac_mc_del_mc(&pdev->dev); + edac_mc_free(mci); + platform_set_drvdata(pdev, NULL); + + return 0; +} + +static struct platform_driver axp_mc_driver = { + .probe = axp_mc_probe, + .remove = axp_mc_remove, + .driver = { + .name = "armada_xp_mc_edac", + .of_match_table = of_match_ptr(axp_mc_of_match), + }, +}; + +/************************ EDAC Device (L2 Cache) ***************************/ + +struct aurora_l2_drvdata { + void __iomem *base; + + char msg[128]; + + /* error injection via debugfs */ + uint32_t inject_addr; + uint32_t inject_mask; + uint8_t inject_ctl; + + struct dentry *debugfs; +}; + +#ifdef CONFIG_EDAC_DEBUG +static void aurora_l2_inject(struct aurora_l2_drvdata *drvdata) +{ + drvdata->inject_addr &= AURORA_ERR_INJECT_CTL_ADDR_MASK; + drvdata->inject_ctl &= AURORA_ERR_INJECT_CTL_EN_MASK; + writel(0, drvdata->base + AURORA_ERR_INJECT_CTL_REG); + writel(drvdata->inject_mask, drvdata->base + AURORA_ERR_INJECT_MASK_REG); + writel(drvdata->inject_addr | drvdata->inject_ctl, drvdata->base + AURORA_ERR_INJECT_CTL_REG); +} +#endif + +static void aurora_l2_check(struct edac_device_ctl_info *dci) +{ + struct aurora_l2_drvdata *drvdata = dci->pvt_info; + uint32_t cnt, src, txn, err, attr_cap, addr_cap, way_cap; + unsigned int cnt_ce, cnt_ue; + char *msg = drvdata->msg; + size_t size = sizeof(drvdata->msg); + size_t len = 0; + + cnt = readl(drvdata->base + AURORA_ERR_CNT_REG); + attr_cap = readl(drvdata->base + AURORA_ERR_ATTR_CAP_REG); + addr_cap = readl(drvdata->base + AURORA_ERR_ADDR_CAP_REG); + way_cap = readl(drvdata->base + AURORA_ERR_WAY_CAP_REG); + + cnt_ce = (cnt & AURORA_ERR_CNT_CE_MASK) >> AURORA_ERR_CNT_CE_OFFSET; + cnt_ue = (cnt & AURORA_ERR_CNT_UE_MASK) >> AURORA_ERR_CNT_UE_OFFSET; + /* clear error counter registers */ + if (cnt_ce || cnt_ue) + writel(AURORA_ERR_CNT_CLR, drvdata->base + AURORA_ERR_CNT_REG); + + if (!(attr_cap & AURORA_ERR_ATTR_CAP_VALID)) + goto clear_remaining; + + src = (attr_cap & AURORA_ERR_ATTR_SRC_MSK) >> AURORA_ERR_ATTR_SRC_OFF; + if (src <= 3) + len += snprintf(msg+len, size-len, "src=CPU%d ", src); + else + len += snprintf(msg+len, size-len, "src=IO "); + + txn = (attr_cap & AURORA_ERR_ATTR_TXN_MSK) >> AURORA_ERR_ATTR_TXN_OFF; + switch (txn) { + case 0: + len += snprintf(msg+len, size-len, "txn=Data-Read "); + break; + case 1: + len += snprintf(msg+len, size-len, "txn=Isn-Read "); + break; + case 2: + len += snprintf(msg+len, size-len, "txn=Clean-Flush "); + break; + case 3: + len += snprintf(msg+len, size-len, "txn=Eviction "); + break; + case 4: + len += snprintf(msg+len, size-len, + "txn=Read-Modify-Write "); + break; + } + + err = (attr_cap & AURORA_ERR_ATTR_ERR_MSK) >> AURORA_ERR_ATTR_ERR_OFF; + switch (err) { + case 0: + len += snprintf(msg+len, size-len, "err=CorrECC "); + break; + case 1: + len += snprintf(msg+len, size-len, "err=UnCorrECC "); + break; + case 2: + len += snprintf(msg+len, size-len, "err=TagParity "); + break; + } + + len += snprintf(msg+len, size-len, "addr=0x%x ", addr_cap & AURORA_ERR_ADDR_CAP_ADDR_MASK); + len += snprintf(msg+len, size-len, "index=0x%x ", (way_cap & AURORA_ERR_WAY_IDX_MSK) >> AURORA_ERR_WAY_IDX_OFF); + len += snprintf(msg+len, size-len, "way=0x%x", (way_cap & AURORA_ERR_WAY_CAP_WAY_MASK) >> AURORA_ERR_WAY_CAP_WAY_OFFSET); + + /* clear error capture registers */ + writel(AURORA_ERR_ATTR_CAP_VALID, drvdata->base + AURORA_ERR_ATTR_CAP_REG); + if (err) { + /* UnCorrECC or TagParity */ + if (cnt_ue) + cnt_ue--; + edac_device_handle_ue(dci, 0, 0, drvdata->msg); + } else { + if (cnt_ce) + cnt_ce--; + edac_device_handle_ce(dci, 0, 0, drvdata->msg); + } + +clear_remaining: + /* report remaining errors */ + while (cnt_ue--) + edac_device_handle_ue(dci, 0, 0, "details unavailable (multiple errors)"); + while (cnt_ce--) + edac_device_handle_ue(dci, 0, 0, "details unavailable (multiple errors)"); +} + +static void aurora_l2_poll(struct edac_device_ctl_info *dci) +{ +#ifdef CONFIG_EDAC_DEBUG + struct aurora_l2_drvdata *drvdata = dci->pvt_info; +#endif + + aurora_l2_check(dci); +#ifdef CONFIG_EDAC_DEBUG + aurora_l2_inject(drvdata); +#endif +} + +static const struct of_device_id aurora_l2_of_match[] = { + {.compatible = "marvell,aurora-system-cache",}, + {}, +}; +MODULE_DEVICE_TABLE(of, aurora_l2_of_match); + +static int aurora_l2_probe(struct platform_device *pdev) +{ + struct aurora_l2_drvdata *drvdata; + struct edac_device_ctl_info *dci; + const struct of_device_id *id; + uint32_t l2x0_aux_ctrl; + void __iomem *base; + struct resource *r; + + r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!r) { + dev_err(&pdev->dev, "Unable to get mem resource\n"); + return -ENODEV; + } + + base = devm_ioremap_resource(&pdev->dev, r); + if (IS_ERR(base)) { + dev_err(&pdev->dev, "Unable to map regs\n"); + return PTR_ERR(base); + } + + l2x0_aux_ctrl = readl(base + L2X0_AUX_CTRL); + if (!(l2x0_aux_ctrl & AURORA_ACR_PARITY_EN)) + dev_warn(&pdev->dev, "tag parity is not enabled"); + if (!(l2x0_aux_ctrl & AURORA_ACR_ECC_EN)) + dev_warn(&pdev->dev, "data ECC is not enabled"); + + dci = edac_device_alloc_ctl_info(sizeof(*drvdata), + "cpu", 1, "L", 1, 2, NULL, 0, 0); + if (!dci) + return -ENOMEM; + + drvdata = dci->pvt_info; + drvdata->base = base; + dci->dev = &pdev->dev; + platform_set_drvdata(pdev, dci); + + id = of_match_device(aurora_l2_of_match, &pdev->dev); + dci->edac_check = aurora_l2_poll; + dci->mod_name = pdev->dev.driver->name; + dci->ctl_name = id ? id->compatible : "unknown"; + dci->dev_name = dev_name(&pdev->dev); + + /* clear registers */ + writel(AURORA_ERR_CNT_CLR, drvdata->base + AURORA_ERR_CNT_REG); + writel(AURORA_ERR_ATTR_CAP_VALID, drvdata->base + AURORA_ERR_ATTR_CAP_REG); + + if (edac_device_add_device(dci)) { + edac_device_free_ctl_info(dci); + return -EINVAL; + } + +#ifdef CONFIG_EDAC_DEBUG + drvdata->debugfs = edac_debugfs_create_dir(dev_name(&pdev->dev)); + if (drvdata->debugfs) { + edac_debugfs_create_x32("inject_addr", 0644, + drvdata->debugfs, + &drvdata->inject_addr); + edac_debugfs_create_x32("inject_mask", 0644, + drvdata->debugfs, + &drvdata->inject_mask); + edac_debugfs_create_x8("inject_ctl", 0644, + drvdata->debugfs, &drvdata->inject_ctl); + } +#endif + + return 0; +} + +static int aurora_l2_remove(struct platform_device *pdev) +{ + struct edac_device_ctl_info *dci = platform_get_drvdata(pdev); +#ifdef CONFIG_EDAC_DEBUG + struct aurora_l2_drvdata *drvdata = dci->pvt_info; + + edac_debugfs_remove_recursive(drvdata->debugfs); +#endif + edac_device_del_device(&pdev->dev); + edac_device_free_ctl_info(dci); + platform_set_drvdata(pdev, NULL); + + return 0; +} + +static struct platform_driver aurora_l2_driver = { + .probe = aurora_l2_probe, + .remove = aurora_l2_remove, + .driver = { + .name = "aurora_l2_edac", + .of_match_table = of_match_ptr(aurora_l2_of_match), + }, +}; + +/************************ Driver registration ******************************/ + +static struct platform_driver * const drivers[] = { + &axp_mc_driver, + &aurora_l2_driver, +}; + +static int __init armada_xp_edac_init(void) +{ + int res; + + /* only polling is supported */ + edac_op_state = EDAC_OPSTATE_POLL; + + res = platform_register_drivers(drivers, ARRAY_SIZE(drivers)); + if (res) + pr_warn("Aramda XP EDAC drivers fail to register\n"); + + return 0; +} +module_init(armada_xp_edac_init); + +static void __exit armada_xp_edac_exit(void) +{ + platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); +} +module_exit(armada_xp_edac_exit); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Pengutronix"); +MODULE_DESCRIPTION("EDAC Drivers for Marvell Armada XP SDRAM and L2 Cache Controller"); -- 2.22.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel