[PATCH] drm/amdgpu: Improve error checking in amdgpu_virt_rlcg_reg_rw (v2)

[Victor Lu]

The current error detection only looks for a timeout.
This should be changed to also check scratch_reg1 for any errors
returned from RLCG.

v2: remove new error value

Signed-off-by: Victor Lu <victorchengchi...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 5 +++--
 drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h | 1 +
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
index 6ff7d3fb2008..7a4eae36778a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
@@ -979,7 +979,7 @@ u32 amdgpu_virt_rlcg_reg_rw(struct amdgpu_device *adev, u32 
offset, u32 v, u32 f
                 * SCRATCH_REG0         = read/write value
                 * SCRATCH_REG1[30:28]  = command
                 * SCRATCH_REG1[19:0]   = address in dword
-                * SCRATCH_REG1[26:24]  = Error reporting
+                * SCRATCH_REG1[27:24]  = Error reporting
                 */
                writel(v, scratch_reg0);
                writel((offset | flag), scratch_reg1);
@@ -993,7 +993,8 @@ u32 amdgpu_virt_rlcg_reg_rw(struct amdgpu_device *adev, u32 
offset, u32 v, u32 f
                        udelay(10);
                }
 
-               if (i >= timeout) {
+               tmp = readl(scratch_reg1);
+               if (i >= timeout || (tmp & AMDGPU_RLCG_SCRATCH1_ERROR_MASK) != 
0) {
                        if (amdgpu_sriov_rlcg_error_report_enabled(adev)) {
                                if (tmp & AMDGPU_RLCG_VFGATE_DISABLED) {
                                        dev_err(adev->dev,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
index fa7be5f277b9..3f59b7b5523f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
@@ -45,6 +45,7 @@
 #define AMDGPU_RLCG_REG_NOT_IN_RANGE           0x1000000
 
 #define AMDGPU_RLCG_SCRATCH1_ADDRESS_MASK      0xFFFFF
+#define AMDGPU_RLCG_SCRATCH1_ERROR_MASK        0xF000000
 
 /* all asic after AI use this offset */
 #define mmRCC_IOV_FUNC_IDENTIFIER 0xDE5
-- 
2.34.1