drm/amdgpu: adding xgmi error monitoring

monitor xgmi errors via mc pie status through fica registers.

Signed-off-by: Jonathan Kim <Jonathan.Kim@amd.com>
Reviewed-by: Kent Russell <Kent.Russell@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 36 insertions, 2 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
index 4e8d60eec0fe..65aae75f80fd 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
@@ -25,7 +25,7 @@
 #include "amdgpu.h"
 #include "amdgpu_xgmi.h"
 #include "amdgpu_smu.h"
-
+#include "df/df_3_6_offset.h"
 
 static DEFINE_MUTEX(xgmi_mutex);
 
@@ -131,9 +131,37 @@ static ssize_t amdgpu_xgmi_show_device_id(struct device *dev,
 
 }
 
+#define AMDGPU_XGMI_SET_FICAA(o)        ((o) | 0x456801)
+static ssize_t amdgpu_xgmi_show_error(struct device *dev,
+                                      struct device_attribute *attr,
+                                      char *buf)
+{
+        struct drm_device *ddev = dev_get_drvdata(dev);
+        struct amdgpu_device *adev = ddev->dev_private;
+        uint32_t ficaa_pie_ctl_in, ficaa_pie_status_in;
+        uint64_t fica_out;
+        unsigned int error_count = 0;
+
+        ficaa_pie_ctl_in = AMDGPU_XGMI_SET_FICAA(0x200);
+        ficaa_pie_status_in = AMDGPU_XGMI_SET_FICAA(0x208);
 
-static DEVICE_ATTR(xgmi_device_id, S_IRUGO, amdgpu_xgmi_show_device_id, NULL);
+        fica_out = adev->df_funcs->get_fica(adev, ficaa_pie_ctl_in);
+        if (fica_out != 0x1f)
+                pr_err("xGMI error counters not enabled!\n");
+
+        fica_out = adev->df_funcs->get_fica(adev, ficaa_pie_status_in);
+
+        if ((fica_out & 0xffff) == 2)
+                error_count = ((fica_out >> 62) & 0x1) + (fica_out >> 63);
 
+        adev->df_funcs->set_fica(adev, ficaa_pie_status_in, 0, 0);
+
+        return snprintf(buf, PAGE_SIZE, "%d\n", error_count);
+}
+
+
+static DEVICE_ATTR(xgmi_device_id, S_IRUGO, amdgpu_xgmi_show_device_id, NULL);
+static DEVICE_ATTR(xgmi_error, S_IRUGO, amdgpu_xgmi_show_error, NULL);
 
 static int amdgpu_xgmi_sysfs_add_dev_info(struct amdgpu_device *adev,
                                          struct amdgpu_hive_info *hive)
@@ -148,6 +176,12 @@ static int amdgpu_xgmi_sysfs_add_dev_info(struct amdgpu_device *adev,
                 return ret;
         }
 
+        /* Create xgmi error file */
+        ret = device_create_file(adev->dev, &dev_attr_xgmi_error);
+        if (ret)
+                pr_err("failed to create xgmi_error\n");
+
+
         /* Create sysfs link to hive info folder on the first device */
         if (adev != hive->adev) {
                 ret = sysfs_create_link(&adev->dev->kobj, hive->kobj,