Am 11.03.24 um 13:22 schrieb Sunil Khatri:
Add relevant ringbuffer information such as
rptr, wptr, ring name, ring size and also
the ring contents for each ring on a gpu reset.
Signed-off-by: Sunil Khatri <sunil.khatri@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
index 6d059f853adc..1992760039da 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
@@ -215,6 +215,27 @@ amdgpu_devcoredump_read(char *buffer, loff_t offset, size_t count,
fault_info->status);
}
+ drm_printf(&p, "Ring buffer information\n");
+ for (int i = 0; i < coredump->adev->num_rings; i++) {
+ int j = 0;
+ struct amdgpu_ring *ring = coredump->adev->rings[i];
+
+ drm_printf(&p, "ring name: %s\n", ring->name);
+ drm_printf(&p, "Rptr: 0x%llx Wptr: 0x%llx\n",
+ amdgpu_ring_get_rptr(ring) & ring->buf_mask,
+ amdgpu_ring_get_wptr(ring) & ring->buf_mask);
Don't apply the mask here. We do have some use cases where the rptr and
wptr are outside the ring buffer.
+ drm_printf(&p, "Ring size in dwords: %d\n",
+ ring->ring_size / 4);
Rather print the mask as additional value here.
+ drm_printf(&p, "Ring contents\n");
+ drm_printf(&p, "Offset \t Value\n");
+
+ while (j < ring->ring_size) {
+ drm_printf(&p, "0x%x \t 0x%x\n", j, ring->ring[j/4]);
+ j += 4;
+ }
+ drm_printf(&p, "Ring dumped\n");
That seems superfluous.
Regards,
Christian.
+ }
+
if (coredump->reset_vram_lost)
drm_printf(&p, "VRAM is lost due to GPU reset!\n");
if (coredump->adev->reset_info.num_regs) {
