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Subject[PATCH v9 7/8] EDAC: Add driver for the Marvell Armada XP SDRAM and L2 cache ECC
Date
From: Jan Luebbe <jlu@pengutronix.de>

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 <jlu@pengutronix.de>
[cp use SPDX license]
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Borislav Petkov <bp@suse.de>
---
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 <jlu@pengutronix.de>
+L: linux-edac@vger.kernel.org
+S: Maintained
+F: drivers/edac/armada_xp_*
+
EDAC-AST2500
M: Stefan Schaeckeler <sschaeck@cisco.com>
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 <kernel@pengutronix.de>
+ */
+
+#include <linux/kernel.h>
+#include <linux/edac.h>
+#include <linux/of_platform.h>
+
+#include <asm/hardware/cache-l2x0.h>
+#include <asm/hardware/cache-aurora-l2.h>
+
+#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
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