Am 19.07.24 um 11:16 schrieb Jack Xiao:
wait memory room until enough before writing mes packets
to avoid ring buffer overflow.
Signed-off-by: Jack Xiao <Jack.Xiao@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/mes_v11_0.c | 18 ++++++++++++++----
drivers/gpu/drm/amd/amdgpu/mes_v12_0.c | 18 ++++++++++++++----
2 files changed, 28 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
index 8ce51b9236c1..68c74adf79f1 100644
--- a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
@@ -168,7 +168,7 @@ static int mes_v11_0_submit_pkt_and_poll_completion(struct amdgpu_mes *mes,
const char *op_str, *misc_op_str;
unsigned long flags;
u64 status_gpu_addr;
- u32 status_offset;
+ u32 seq, status_offset;
u64 *status_ptr;
signed long r;
int ret;
@@ -196,6 +196,13 @@ static int mes_v11_0_submit_pkt_and_poll_completion(struct amdgpu_mes *mes,
if (r)
goto error_unlock_free;
+ seq = ++ring->fence_drv.sync_seq;
+ r = amdgpu_fence_wait_polling(ring,
+ seq - ring->fence_drv.num_fences_mask,
+ timeout);
+ if (r < 1)
+ goto error_undo;
+
api_status = (struct MES_API_STATUS *)((char *)pkt + api_status_off);
api_status->api_completion_fence_addr = status_gpu_addr;
api_status->api_completion_fence_value = 1;
@@ -208,8 +215,7 @@ static int mes_v11_0_submit_pkt_and_poll_completion(struct amdgpu_mes *mes,
mes_status_pkt.header.dwsize = API_FRAME_SIZE_IN_DWORDS;
mes_status_pkt.api_status.api_completion_fence_addr =
ring->fence_drv.gpu_addr;
- mes_status_pkt.api_status.api_completion_fence_value =
- ++ring->fence_drv.sync_seq;
+ mes_status_pkt.api_status.api_completion_fence_value = seq;
amdgpu_ring_write_multiple(ring, &mes_status_pkt,
sizeof(mes_status_pkt) / 4);
@@ -229,7 +235,7 @@ static int mes_v11_0_submit_pkt_and_poll_completion(struct amdgpu_mes *mes,
dev_dbg(adev->dev, "MES msg=%d was emitted\n",
x_pkt->header.opcode);
- r = amdgpu_fence_wait_polling(ring, ring->fence_drv.sync_seq, timeout);
+ r = amdgpu_fence_wait_polling(ring, seq, timeout);
if (r < 1 || !*status_ptr) {
if (misc_op_str)
@@ -252,6 +258,10 @@ static int mes_v11_0_submit_pkt_and_poll_completion(struct amdgpu_mes *mes,
amdgpu_device_wb_free(adev, status_offset);
return 0;
+error_undo:
+ dev_err(adev->dev, "MES ring buffer is full.\n");
+ amdgpu_ring_undo(ring);
+
error_unlock_free:
spin_unlock_irqrestore(&mes->ring_lock, flags);
diff --git a/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c b/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c
index c9f74231ad59..48e01206bcc4 100644
--- a/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c
@@ -154,7 +154,7 @@ static int mes_v12_0_submit_pkt_and_poll_completion(struct amdgpu_mes *mes,
const char *op_str, *misc_op_str;
unsigned long flags;
u64 status_gpu_addr;
- u32 status_offset;
+ u32 seq, status_offset;
u64 *status_ptr;
signed long r;
int ret;
@@ -182,6 +182,13 @@ static int mes_v12_0_submit_pkt_and_poll_completion(struct amdgpu_mes *mes,
if (r)
goto error_unlock_free;
+ seq = ++ring->fence_drv.sync_seq;
+ r = amdgpu_fence_wait_polling(ring,
+ seq - ring->fence_drv.num_fences_mask,
That's what's amdgpu_fence_emit_polling() does anyway.
So this here just moves the polling a bit earlier.
I think we rather need to increase the MES ring size instead.
Regards,
Christian.
+ timeout);
+ if (r < 1)
+ goto error_undo;
+
api_status = (struct MES_API_STATUS *)((char *)pkt + api_status_off);
api_status->api_completion_fence_addr = status_gpu_addr;
api_status->api_completion_fence_value = 1;
@@ -194,8 +201,7 @@ static int mes_v12_0_submit_pkt_and_poll_completion(struct amdgpu_mes *mes,
mes_status_pkt.header.dwsize = API_FRAME_SIZE_IN_DWORDS;
mes_status_pkt.api_status.api_completion_fence_addr =
ring->fence_drv.gpu_addr;
- mes_status_pkt.api_status.api_completion_fence_value =
- ++ring->fence_drv.sync_seq;
+ mes_status_pkt.api_status.api_completion_fence_value = seq;
amdgpu_ring_write_multiple(ring, &mes_status_pkt,
sizeof(mes_status_pkt) / 4);
@@ -215,7 +221,7 @@ static int mes_v12_0_submit_pkt_and_poll_completion(struct amdgpu_mes *mes,
dev_dbg(adev->dev, "MES msg=%d was emitted\n",
x_pkt->header.opcode);
- r = amdgpu_fence_wait_polling(ring, ring->fence_drv.sync_seq, timeout);
+ r = amdgpu_fence_wait_polling(ring, seq, timeout);
if (r < 1 || !*status_ptr) {
if (misc_op_str)
@@ -238,6 +244,10 @@ static int mes_v12_0_submit_pkt_and_poll_completion(struct amdgpu_mes *mes,
amdgpu_device_wb_free(adev, status_offset);
return 0;
+error_undo:
+ dev_err(adev->dev, "MES ring buffer is full.\n");
+ amdgpu_ring_undo(ring);
+
error_unlock_free:
spin_unlock_irqrestore(&mes->ring_lock, flags);
