drm/amdgpu:don't change ctx->reset_couner upon query

reset_counter marks the reset counter number once the context
is created, shouldn't be changed due to query.

To keep U/K interface on the ctx_query and keep ctx's reset_counter
logic compatible with GPU RESET feature, now use another var named
"reset_counter_query" to replace the original checked & updated in
amdgpu_ctx_query.

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 64a0d38..34268aa 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -735,6 +735,7 @@ struct amdgpu_ctx {
        struct amdgpu_device    *adev;
        struct amdgpu_queue_mgr queue_mgr;
        unsigned                reset_counter;
+       unsigned        reset_counter_query;
        uint32_t                vram_lost_counter;
        spinlock_t              ring_lock;
        struct dma_fence        **fences;

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
index 1bf4cdc..c539fb6 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
@@ -75,6 +75,7 @@ static int amdgpu_ctx_init(struct amdgpu_device *adev,
        }
 
        ctx->reset_counter = atomic_read(&adev->gpu_reset_counter);
+       ctx->reset_counter_query = ctx->reset_counter;
        ctx->vram_lost_counter = atomic_read(&adev->vram_lost_counter);
        ctx->init_priority = priority;
        ctx->override_priority = AMD_SCHED_PRIORITY_UNSET;
@@ -216,11 +217,11 @@ static int amdgpu_ctx_query(struct amdgpu_device *adev,
        /* determine if a GPU reset has occured since the last call */
        reset_counter = atomic_read(&adev->gpu_reset_counter);
        /* TODO: this should ideally return NO, GUILTY, or INNOCENT. */
-       if (ctx->reset_counter == reset_counter)
+       if (ctx->reset_counter_query == reset_counter)
                out->state.reset_status = AMDGPU_CTX_NO_RESET;
        else
                out->state.reset_status = AMDGPU_CTX_UNKNOWN_RESET;
-       ctx->reset_counter = reset_counter;
+       ctx->reset_counter_query = reset_counter;
 
        mutex_unlock(&mgr->lock);
        return 0;