drm/msm: add basic hangcheck/recovery mechanism
A basic, no-frills recovery mechanism in case the gpu gets wedged. We
could try to be a bit more fancy and restart the next submit after the
one that got wedged, but for now keep it simple. This is enough to
recover things if, for example, the gpu hangs mid way through a piglit
run.
Signed-off-by: Rob Clark <robdclark@gmail.com>
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
index 282163e..a605847 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
@@ -111,6 +111,28 @@
return adreno_gpu->memptrs->fence;
}
+void adreno_recover(struct msm_gpu *gpu)
+{
+ struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
+ struct drm_device *dev = gpu->dev;
+ int ret;
+
+ gpu->funcs->pm_suspend(gpu);
+
+ /* reset ringbuffer: */
+ gpu->rb->cur = gpu->rb->start;
+
+ /* reset completed fence seqno, just discard anything pending: */
+ adreno_gpu->memptrs->fence = gpu->submitted_fence;
+
+ gpu->funcs->pm_resume(gpu);
+ ret = gpu->funcs->hw_init(gpu);
+ if (ret) {
+ dev_err(dev->dev, "gpu hw init failed: %d\n", ret);
+ /* hmm, oh well? */
+ }
+}
+
int adreno_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit,
struct msm_file_private *ctx)
{
@@ -119,8 +141,6 @@
struct msm_ringbuffer *ring = gpu->rb;
unsigned i, ibs = 0;
- adreno_gpu->last_fence = submit->fence;
-
for (i = 0; i < submit->nr_cmds; i++) {
switch (submit->cmd[i].type) {
case MSM_SUBMIT_CMD_IB_TARGET_BUF:
@@ -225,7 +245,7 @@
adreno_gpu->rev.patchid);
seq_printf(m, "fence: %d/%d\n", adreno_gpu->memptrs->fence,
- adreno_gpu->last_fence);
+ gpu->submitted_fence);
seq_printf(m, "rptr: %d\n", adreno_gpu->memptrs->rptr);
seq_printf(m, "wptr: %d\n", adreno_gpu->memptrs->wptr);
seq_printf(m, "rb wptr: %d\n", get_wptr(gpu->rb));