From: Marek Majtyka <marekx.majt...@intel.com>
Signed-off-by: Marek Majtyka <marekx.majt...@intel.com>
---
drivers/edac/axxia_edac-cmc_56xx.c | 87 +++++++++++++++++++++++++++++++++++++-
1 file changed, 86 insertions(+), 1 deletion(-)
diff --git a/drivers/edac/axxia_edac-cmc_56xx.c
b/drivers/edac/axxia_edac-cmc_56xx.c
index 1f5d3aa..9d22279 100644
--- a/drivers/edac/axxia_edac-cmc_56xx.c
+++ b/drivers/edac/axxia_edac-cmc_56xx.c
@@ -31,6 +31,7 @@
#include "edac_core.h"
#include "edac_module.h"
+#define CONFIG_DEBUG_CMEM 1
#define FMT "%s: syscon lookup failed hence using hardcoded register address\n"
#define MPR_FMT2 "\n%3d %#010x %#010x"
@@ -286,6 +287,31 @@ struct __packed cm_56xx_denali_ctl_34
#endif
};
+#ifdef CONFIG_DEBUG_CMEM
+
+#define CM_56XX_DENALI_CTL_62 0xf8
+
+struct __packed cm_56xx_denali_ctl_62
+{
+#ifdef CPU_BIG_ENDIAN
+ unsigned reserved0 : 2;
+ unsigned xor_check_bits : 14;
+ unsigned reserved1 : 7;
+ unsigned fwc : 1;
+ unsigned reserved2 : 7;
+ unsigned ecc_en : 1;
+#else /* Little Endian */
+ unsigned ecc_en : 1;
+ unsigned reserved2 : 7;
+ unsigned fwc : 1;
+ unsigned reserved1 : 7;
+ unsigned xor_check_bits : 14;
+ unsigned reserved0 : 2;
+#endif
+};
+
+#endif
+
struct __packed cm_56xx_denali_ctl_74
{
#ifdef CPU_BIG_ENDIAN
@@ -476,6 +502,47 @@ struct intel_edac_dev_info {
};
#ifdef CONFIG_DEBUG_CMEM
+static int setup_fault_injection(struct intel_edac_dev_info *dev_info,
+ int fault, int enable)
+{
+ struct cm_56xx_denali_ctl_62 denali_ctl_62;
+
+ if (ncr_read(dev_info->cm_region,
+ CM_56XX_DENALI_CTL_62,
+ 4, &denali_ctl_62))
+ goto error_read;
+
+ denali_ctl_62.xor_check_bits = fault;
+
+ if (ncr_write(dev_info->cm_region,
+ CM_56XX_DENALI_CTL_62,
+ 4, (u32 *) &denali_ctl_62))
+ goto error_write;
+
+ if (ncr_read(dev_info->cm_region,
+ CM_56XX_DENALI_CTL_62,
+ 4, &denali_ctl_62))
+ goto error_read;
+
+ denali_ctl_62.fwc = (enable > 0 ? 0x1 : 0x0);
+
+ if (ncr_write(dev_info->cm_region,
+ CM_56XX_DENALI_CTL_62,
+ 4, (u32 *) &denali_ctl_62))
+ goto error_write;
+ return 0;
+
+error_read:
+ printk_ratelimited("%s: Error reading denali_ctl_62\n",
+ dev_name(&dev_info->pdev->dev));
+ return 1;
+
+error_write:
+ printk_ratelimited("%s: Error writing denali_ctl_62\n",
+ dev_name(&dev_info->pdev->dev));
+ return 1;
+}
+
static ssize_t mpr1_dump_show(struct edac_device_ctl_info
*edac_dev, char *data)
{
@@ -1335,7 +1402,15 @@ axxia_cmem_read(struct file *filp, char *buffer, size_t
length, loff_t *offset)
*/
len = snprintf(buf, PAGE_SIZE-1, "Node: 0x%x\n"
"Command available:\n"
- " dump - triggers mpr_page1 dump.\n",
+ " dump - triggers mpr_page1 dump.\n"
+ " cerror - enable correctable error injection.\n"
+ " uerror - enable uncorrectable error injection.\n"
+ " disable - disable errors injection\n"
+ " When error is enabled run a sequence:\n"
+ " ncpWrite -w 32 0x%x.0x0.0x4 0x11223344\n"
+ " ncpRead 0x%x.0x0.0x4\n",
+ (int) dev_info->cm_region >> 16,
+ (int) dev_info->cm_region >> 16,
(int) dev_info->cm_region >> 16);
mutex_unlock(&dev_info->state_machine_lock);
@@ -1376,6 +1451,16 @@ axxia_cmem_write(struct file *file, const char __user
*buffer,
atomic_inc(&dev_info->data->dump_in_progress);
wake_up(&dev_info->data->dump_wq);
}
+ if (!strncmp(buf, "cerror", 6)) {
+ /* 0x75 0x75 */
+ setup_fault_injection(dev_info, 0x3af5, 1);
+ }
+ if (!strncmp(buf, "uerror", 6)) {
+ /* 0x3 0x3 */
+ setup_fault_injection(dev_info, 0x183, 1);
+ }
+ if (!strncmp(buf, "disable", 7))
+ setup_fault_injection(dev_info, 0x0, 0);
kfree(buf);
return count;
--
2.7.4
--
_______________________________________________
linux-yocto mailing list
linux-yocto@yoctoproject.org
https://lists.yoctoproject.org/listinfo/linux-yocto
