amdgpu: add semaphore support
the semaphore is a binary semaphore. the work flow is:
1. create sem
2. signal sem
3. wait sem, reset sem after signalled
4. destroy sem.
Signed-off-by: Chunming Zhou <david1.zhou@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
diff --git a/amdgpu/amdgpu_internal.h b/amdgpu/amdgpu_internal.h
index 7dd5c1c..557ba1f 100644
--- a/amdgpu/amdgpu_internal.h
+++ b/amdgpu/amdgpu_internal.h
@@ -111,8 +111,23 @@
struct amdgpu_context {
struct amdgpu_device *dev;
+ /** Mutex for accessing fences and to maintain command submissions
+ in good sequence. */
+ pthread_mutex_t sequence_mutex;
/* context id*/
uint32_t id;
+ uint64_t last_seq[AMDGPU_HW_IP_NUM][AMDGPU_HW_IP_INSTANCE_MAX_COUNT][AMDGPU_CS_MAX_RINGS];
+ struct list_head sem_list[AMDGPU_HW_IP_NUM][AMDGPU_HW_IP_INSTANCE_MAX_COUNT][AMDGPU_CS_MAX_RINGS];
+};
+
+/**
+ * Structure describing sw semaphore based on scheduler
+ *
+ */
+struct amdgpu_semaphore {
+ atomic_t refcount;
+ struct list_head list;
+ struct amdgpu_cs_fence signal_fence;
};
/**