#define ECCW0_FLIP_CTRL 0x109C
#define ECCW0_FLIP0_OFFSET 0x10A0
+#define ECCW0_FLIP0_BITS 31
+#define ECCW0_FLIP1_OFFSET 0x10A4
#define ECCW1_FLIP_CTRL 0x10AC
#define ECCW1_FLIP0_OFFSET 0x10B0
+#define ECCW1_FLIP1_OFFSET 0x10B4
#define ECCR0_CERR_STAT_OFFSET 0x10BC
#define ECCR0_CE_ADDR_LO_OFFSET 0x10C0
#define ECCR0_CE_ADDR_HI_OFFSET 0x10C4
#define XDDR_BUS_WIDTH_32 1
#define XDDR_BUS_WIDTH_16 2
-#define ECC_CEPOISON_MASK 0x1
-#define ECC_UEPOISON_MASK 0x3
-
#define XDDR_MAX_ROW_CNT 18
#define XDDR_MAX_COL_CNT 10
#define XDDR_MAX_RANK_CNT 2
* https://docs.xilinx.com/r/en-US/am012-versal-register-reference/PCSR_LOCK-XRAM_SLCR-Register
*/
#define PCSR_UNLOCK_VAL 0xF9E8D7C6
+#define PCSR_LOCK_VAL 1
#define XDDR_ERR_TYPE_CE 0
#define XDDR_ERR_TYPE_UE 1
#define XILINX_DRAM_SIZE_12G 3
#define XILINX_DRAM_SIZE_16G 4
#define XILINX_DRAM_SIZE_32G 5
+#define NUM_UE_BITPOS 2
/**
* struct ecc_error_info - ECC error log information.
writel(regval, priv->ddrmc_baseaddr + XDDR_ISR_OFFSET);
/* Lock the PCSR registers */
- writel(1, priv->ddrmc_baseaddr + XDDR_PCSR_OFFSET);
+ writel(PCSR_LOCK_VAL, priv->ddrmc_baseaddr + XDDR_PCSR_OFFSET);
edac_dbg(3, "Total error count CE %d UE %d\n",
priv->ce_cnt, priv->ue_cnt);
}
writel(XDDR_IRQ_UE_MASK,
priv->ddrmc_baseaddr + XDDR_IRQ1_EN_OFFSET);
/* Lock the PCSR registers */
- writel(1, priv->ddrmc_baseaddr + XDDR_PCSR_OFFSET);
+ writel(PCSR_LOCK_VAL, priv->ddrmc_baseaddr + XDDR_PCSR_OFFSET);
}
static void disable_intr(struct edac_priv *priv)
priv->ddrmc_baseaddr + XDDR_IRQ_DIS_OFFSET);
/* Lock the PCSR registers */
- writel(1, priv->ddrmc_baseaddr + XDDR_PCSR_OFFSET);
+ writel(PCSR_LOCK_VAL, priv->ddrmc_baseaddr + XDDR_PCSR_OFFSET);
}
#define to_mci(k) container_of(k, struct mem_ctl_info, dev)
writel(regval, priv->ddrmc_noc_baseaddr + XDDR_NOC_REG_ADEC15_OFFSET);
}
-static ssize_t xddr_inject_data_poison_store(struct mem_ctl_info *mci,
- const char __user *data)
+static void xddr_inject_data_ce_store(struct mem_ctl_info *mci, u8 ce_bitpos)
{
+ u32 ecc0_flip0, ecc1_flip0, ecc0_flip1, ecc1_flip1;
struct edac_priv *priv = mci->pvt_info;
- writel(0, priv->ddrmc_baseaddr + ECCW0_FLIP0_OFFSET);
- writel(0, priv->ddrmc_baseaddr + ECCW1_FLIP0_OFFSET);
-
- if (strncmp(data, "CE", 2) == 0) {
- writel(ECC_CEPOISON_MASK, priv->ddrmc_baseaddr +
- ECCW0_FLIP0_OFFSET);
- writel(ECC_CEPOISON_MASK, priv->ddrmc_baseaddr +
- ECCW1_FLIP0_OFFSET);
+ if (ce_bitpos < ECCW0_FLIP0_BITS) {
+ ecc0_flip0 = BIT(ce_bitpos);
+ ecc1_flip0 = BIT(ce_bitpos);
+ ecc0_flip1 = 0;
+ ecc1_flip1 = 0;
} else {
- writel(ECC_UEPOISON_MASK, priv->ddrmc_baseaddr +
- ECCW0_FLIP0_OFFSET);
- writel(ECC_UEPOISON_MASK, priv->ddrmc_baseaddr +
- ECCW1_FLIP0_OFFSET);
+ ce_bitpos = ce_bitpos - ECCW0_FLIP0_BITS;
+ ecc0_flip1 = BIT(ce_bitpos);
+ ecc1_flip1 = BIT(ce_bitpos);
+ ecc0_flip0 = 0;
+ ecc1_flip0 = 0;
}
- /* Lock the PCSR registers */
- writel(1, priv->ddrmc_baseaddr + XDDR_PCSR_OFFSET);
-
- return 0;
+ writel(ecc0_flip0, priv->ddrmc_baseaddr + ECCW0_FLIP0_OFFSET);
+ writel(ecc1_flip0, priv->ddrmc_baseaddr + ECCW1_FLIP0_OFFSET);
+ writel(ecc0_flip1, priv->ddrmc_baseaddr + ECCW0_FLIP1_OFFSET);
+ writel(ecc1_flip1, priv->ddrmc_baseaddr + ECCW1_FLIP1_OFFSET);
}
-static ssize_t inject_data_poison_store(struct file *file, const char __user *data,
- size_t count, loff_t *ppos)
+/*
+ * To inject a correctable error, the following steps are needed:
+ *
+ * - Write the correctable error bit position value:
+ * echo <bit_pos val> > /sys/kernel/debug/edac/<controller instance>/inject_ce
+ *
+ * poison_setup() derives the row, column, bank, group and rank and
+ * writes to the ADEC registers based on the address given by the user.
+ *
+ * The ADEC12 and ADEC13 are mask registers; write 0 to make sure default
+ * configuration is there and no addresses are masked.
+ *
+ * The row, column, bank, group and rank registers are written to the
+ * match ADEC bit to generate errors at the particular address. ADEC14
+ * and ADEC15 have the match bits.
+ *
+ * xddr_inject_data_ce_store() updates the ECC FLIP registers with the
+ * bits to be corrupted based on the bit position given by the user.
+ *
+ * Upon doing a read to the address the errors are injected.
+ */
+static ssize_t inject_data_ce_store(struct file *file, const char __user *data,
+ size_t count, loff_t *ppos)
{
struct device *dev = file->private_data;
struct mem_ctl_info *mci = to_mci(dev);
struct edac_priv *priv = mci->pvt_info;
+ u8 ce_bitpos;
+ int ret;
+
+ ret = kstrtou8_from_user(data, count, 0, &ce_bitpos);
+ if (ret)
+ return ret;
/* Unlock the PCSR registers */
writel(PCSR_UNLOCK_VAL, priv->ddrmc_baseaddr + XDDR_PCSR_OFFSET);
poison_setup(priv);
+ xddr_inject_data_ce_store(mci, ce_bitpos);
+ ret = count;
+
/* Lock the PCSR registers */
- writel(1, priv->ddrmc_noc_baseaddr + XDDR_PCSR_OFFSET);
+ writel(PCSR_LOCK_VAL, priv->ddrmc_baseaddr + XDDR_PCSR_OFFSET);
+ writel(PCSR_LOCK_VAL, priv->ddrmc_noc_baseaddr + XDDR_PCSR_OFFSET);
+
+ return ret;
+}
+
+static const struct file_operations xddr_inject_ce_fops = {
+ .open = simple_open,
+ .write = inject_data_ce_store,
+ .llseek = generic_file_llseek,
+};
+
+static void xddr_inject_data_ue_store(struct mem_ctl_info *mci, u32 val0, u32 val1)
+{
+ struct edac_priv *priv = mci->pvt_info;
+
+ writel(val0, priv->ddrmc_baseaddr + ECCW0_FLIP0_OFFSET);
+ writel(val0, priv->ddrmc_baseaddr + ECCW0_FLIP1_OFFSET);
+ writel(val1, priv->ddrmc_baseaddr + ECCW1_FLIP1_OFFSET);
+ writel(val1, priv->ddrmc_baseaddr + ECCW1_FLIP1_OFFSET);
+}
+
+/*
+ * To inject an uncorrectable error, the following steps are needed:
+ * echo <bit_pos val> > /sys/kernel/debug/edac/<controller instance>/inject_ue
+ *
+ * poison_setup() derives the row, column, bank, group and rank and
+ * writes to the ADEC registers based on the address given by the user.
+ *
+ * The ADEC12 and ADEC13 are mask registers; write 0 so that none of the
+ * addresses are masked. The row, column, bank, group and rank registers
+ * are written to the match ADEC bit to generate errors at the
+ * particular address. ADEC14 and ADEC15 have the match bits.
+ *
+ * xddr_inject_data_ue_store() updates the ECC FLIP registers with the
+ * bits to be corrupted based on the bit position given by the user. For
+ * uncorrectable errors
+ * 2 bit errors are injected.
+ *
+ * Upon doing a read to the address the errors are injected.
+ */
+static ssize_t inject_data_ue_store(struct file *file, const char __user *data,
+ size_t count, loff_t *ppos)
+{
+ struct device *dev = file->private_data;
+ struct mem_ctl_info *mci = to_mci(dev);
+ struct edac_priv *priv = mci->pvt_info;
+ char buf[6], *pbuf, *token[2];
+ u32 val0 = 0, val1 = 0;
+ u8 len, ue0, ue1;
+ int i, ret;
+
+ len = min_t(size_t, count, sizeof(buf));
+ if (copy_from_user(buf, data, len))
+ return -EFAULT;
+
+ buf[len] = '\0';
+ pbuf = &buf[0];
+ for (i = 0; i < NUM_UE_BITPOS; i++)
+ token[i] = strsep(&pbuf, ",");
+
+ ret = kstrtou8(token[0], 0, &ue0);
+ if (ret)
+ return ret;
+
+ ret = kstrtou8(token[1], 0, &ue1);
+ if (ret)
+ return ret;
+
+ if (ue0 < ECCW0_FLIP0_BITS) {
+ val0 = BIT(ue0);
+ } else {
+ ue0 = ue0 - ECCW0_FLIP0_BITS;
+ val1 = BIT(ue0);
+ }
+
+ if (ue1 < ECCW0_FLIP0_BITS) {
+ val0 |= BIT(ue1);
+ } else {
+ ue1 = ue1 - ECCW0_FLIP0_BITS;
+ val1 |= BIT(ue1);
+ }
- xddr_inject_data_poison_store(mci, data);
+ /* Unlock the PCSR registers */
+ writel(PCSR_UNLOCK_VAL, priv->ddrmc_baseaddr + XDDR_PCSR_OFFSET);
+ writel(PCSR_UNLOCK_VAL, priv->ddrmc_noc_baseaddr + XDDR_PCSR_OFFSET);
+ poison_setup(priv);
+
+ xddr_inject_data_ue_store(mci, val0, val1);
+
+ /* Lock the PCSR registers */
+ writel(PCSR_LOCK_VAL, priv->ddrmc_noc_baseaddr + XDDR_PCSR_OFFSET);
+ writel(PCSR_LOCK_VAL, priv->ddrmc_baseaddr + XDDR_PCSR_OFFSET);
return count;
}
-static const struct file_operations xddr_inject_enable_fops = {
+static const struct file_operations xddr_inject_ue_fops = {
.open = simple_open,
- .write = inject_data_poison_store,
+ .write = inject_data_ue_store,
.llseek = generic_file_llseek,
};
if (!priv->debugfs)
return;
- edac_debugfs_create_file("inject_error", 0200, priv->debugfs,
- &mci->dev, &xddr_inject_enable_fops);
+ if (!edac_debugfs_create_file("inject_ce", 0200, priv->debugfs,
+ &mci->dev, &xddr_inject_ce_fops)) {
+ debugfs_remove_recursive(priv->debugfs);
+ return;
+ }
+
+ if (!edac_debugfs_create_file("inject_ue", 0200, priv->debugfs,
+ &mci->dev, &xddr_inject_ue_fops)) {
+ debugfs_remove_recursive(priv->debugfs);
+ return;
+ }
debugfs_create_x64("address", 0600, priv->debugfs,
&priv->err_inject_addr);
mci->debugfs = priv->debugfs;
return rc;
}
-static int mc_remove(struct platform_device *pdev)
+static void mc_remove(struct platform_device *pdev)
{
struct mem_ctl_info *mci = platform_get_drvdata(pdev);
struct edac_priv *priv = mci->pvt_info;
XPM_EVENT_ERROR_MASK_DDRMC_NCR, err_callback, mci);
edac_mc_del_mc(&pdev->dev);
edac_mc_free(mci);
-
- return 0;
}
static struct platform_driver xilinx_ddr_edac_mc_driver = {
.of_match_table = xlnx_edac_match,
},
.probe = mc_probe,
- .remove = mc_remove,
+ .remove_new = mc_remove,
};
module_platform_driver(xilinx_ddr_edac_mc_driver);
projects / linux-2.6-microblaze.git / blobdiff