drm/amdgpu: Report ras_num_recs in debugfs

Report the number of records stored in the RAS EEPROM table in debugfs.

This can be used by user-space to calculate the capacity of the RAS EEPROM
table since "bad_page_cnt_threshold" is also reported in the same place in
debugfs.

See commit 7fb640714547 ("drm/amdgpu: Add bad_page_cnt_threshold to debugfs").

ras_num_recs can already be inferred by dumping the RAS EEPROM table, also in
the same debugfs location, see commit reference c65b0805e77919 (drm/amdgpu:
RAS EEPROM table is now in debugfs, 2021-04-08). This commit makes it an
integer value easily shown in a single file.

Cc: Alex Deucher <[email protected]>
Cc: Hawking Zhang <[email protected]>
Cc: Tao Zhou <[email protected]>
Cc: Stanley Yang <[email protected]>
Cc: John Clements <[email protected]>
Signed-off-by: Luben Tuikov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Acked-by: Alex Deucher <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index a6c3265cdbc46c1540cd559428c091da3d4b3132..27a32933cbee3baa6ad1182d5e8f32391a7a9308 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -1491,6 +1491,7 @@ static int amdgpu_ras_sysfs_remove_all(struct amdgpu_device *adev)
 static struct dentry *amdgpu_ras_debugfs_create_ctrl_node(struct amdgpu_device *adev)
 {
        struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
+       struct amdgpu_ras_eeprom_control *eeprom = &con->eeprom_control;
        struct drm_minor  *minor = adev_to_drm(adev)->primary;
        struct dentry     *dir;
 
@@ -1501,6 +1502,7 @@ static struct dentry *amdgpu_ras_debugfs_create_ctrl_node(struct amdgpu_device *
                            &amdgpu_ras_debugfs_eeprom_ops);
        debugfs_create_u32("bad_page_cnt_threshold", 0444, dir,
                           &con->bad_page_cnt_threshold);
+       debugfs_create_u32("ras_num_recs", 0444, dir, &eeprom->ras_num_recs);
        debugfs_create_x32("ras_hw_enabled", 0444, dir, &adev->ras_hw_enabled);
        debugfs_create_x32("ras_enabled", 0444, dir, &adev->ras_enabled);
        debugfs_create_file("ras_eeprom_size", S_IRUGO, dir, adev,