From 4d3c4f4f7f22670ae7163b5f9bd6cfea28c2efc6 Mon Sep 17 00:00:00 2001 From: "Jesse.zhang@amd.com" Date: Thu, 13 Feb 2025 10:30:07 +0800 Subject: [PATCH 2185/5403] drm/amdgpu: Introduce cached_rptr and is_guilty callback in amdgpu_ring This patch introduces the following changes: - Add `cached_rptr` to the `amdgpu_ring` structure to store the read pointer before a reset. - Add `is_guilty` callback to the `amdgpu_ring_funcs` structure to check if a ring is guilty of causing a timeout. Suggested-by: Alex Deucher Signed-off-by: Jesse Zhang Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c | 2 ++ drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h | 3 +++ 2 files changed, 5 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c index f53887e2f528..81a7d4faac9c 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c @@ -349,6 +349,8 @@ int amdgpu_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring, ring->buf_mask = (ring->ring_size / 4) - 1; ring->ptr_mask = ring->funcs->support_64bit_ptrs ? 0xffffffffffffffff : ring->buf_mask; + /* Initialize cached_rptr to 0 */ + ring->cached_rptr = 0; /* Allocate ring buffer */ if (ring->is_mes_queue) { diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h index 7372e4aed6b0..52f7a9a79e7b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h @@ -238,6 +238,7 @@ struct amdgpu_ring_funcs { void (*patch_de)(struct amdgpu_ring *ring, unsigned offset); int (*reset)(struct amdgpu_ring *ring, unsigned int vmid); void (*emit_cleaner_shader)(struct amdgpu_ring *ring); + bool (*is_guilty)(struct amdgpu_ring *ring); }; struct amdgpu_ring { @@ -307,6 +308,8 @@ struct amdgpu_ring { bool is_sw_ring; unsigned int entry_index; + /* store the cached rptr to restore after reset */ + uint64_t cached_rptr; }; -- 2.54.0