drm/amdgpu: Simplify kgd2kfd interface

After amdkfd is merged into amdgpu module, amdgpu can call amdkfd
functions directly.
Signed-off-by: Amber Lin <Amber.Lin@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c

@@ -61,17 +61,13 @@ int amdgpu_amdkfd_init(void)
 
 void amdgpu_amdkfd_fini(void)
 {
-	if (kgd2kfd)
-		kgd2kfd->exit();
+	kgd2kfd_exit();
 }
 
 void amdgpu_amdkfd_device_probe(struct amdgpu_device *adev)
 {
 	const struct kfd2kgd_calls *kfd2kgd;
 
-	if (!kgd2kfd)
-		return;
-
 	switch (adev->asic_type) {
 #ifdef CONFIG_DRM_AMDGPU_CIK
 	case CHIP_KAVERI:
@@ -98,7 +94,7 @@ void amdgpu_amdkfd_device_probe(struct amdgpu_device *adev)
 		return;
 	}
 
-	adev->kfd.dev = kgd2kfd->probe((struct kgd_dev *)adev,
+	adev->kfd.dev = kgd2kfd_probe((struct kgd_dev *)adev,
 				      adev->pdev, kfd2kgd);
 
 	if (adev->kfd.dev)
@@ -182,7 +178,7 @@ void amdgpu_amdkfd_device_init(struct amdgpu_device *adev)
 				&gpu_resources.doorbell_start_offset);
 
 		if (adev->asic_type < CHIP_VEGA10) {
-			kgd2kfd->device_init(adev->kfd.dev, &gpu_resources);
+			kgd2kfd_device_init(adev->kfd.dev, &gpu_resources);
 			return;
 		}
 
@@ -211,14 +207,14 @@ void amdgpu_amdkfd_device_init(struct amdgpu_device *adev)
 		gpu_resources.reserved_doorbell_mask = 0x1e0;
 		gpu_resources.reserved_doorbell_val  = 0x0e0;
 
-		kgd2kfd->device_init(adev->kfd.dev, &gpu_resources);
+		kgd2kfd_device_init(adev->kfd.dev, &gpu_resources);
 	}
 }
 
 void amdgpu_amdkfd_device_fini(struct amdgpu_device *adev)
 {
 	if (adev->kfd.dev) {
-		kgd2kfd->device_exit(adev->kfd.dev);
+		kgd2kfd_device_exit(adev->kfd.dev);
 		adev->kfd.dev = NULL;
 	}
 }
@@ -227,13 +223,13 @@ void amdgpu_amdkfd_interrupt(struct amdgpu_device *adev,
 		const void *ih_ring_entry)
 {
 	if (adev->kfd.dev)
-		kgd2kfd->interrupt(adev->kfd.dev, ih_ring_entry);
+		kgd2kfd_interrupt(adev->kfd.dev, ih_ring_entry);
 }
 
 void amdgpu_amdkfd_suspend(struct amdgpu_device *adev)
 {
 	if (adev->kfd.dev)
-		kgd2kfd->suspend(adev->kfd.dev);
+		kgd2kfd_suspend(adev->kfd.dev);
 }
 
 int amdgpu_amdkfd_resume(struct amdgpu_device *adev)
@@ -241,7 +237,7 @@ int amdgpu_amdkfd_resume(struct amdgpu_device *adev)
 	int r = 0;
 
 	if (adev->kfd.dev)
-		r = kgd2kfd->resume(adev->kfd.dev);
+		r = kgd2kfd_resume(adev->kfd.dev);
 
 	return r;
 }
@@ -251,7 +247,7 @@ int amdgpu_amdkfd_pre_reset(struct amdgpu_device *adev)
 	int r = 0;
 
 	if (adev->kfd.dev)
-		r = kgd2kfd->pre_reset(adev->kfd.dev);
+		r = kgd2kfd_pre_reset(adev->kfd.dev);
 
 	return r;
 }
@@ -261,7 +257,7 @@ int amdgpu_amdkfd_post_reset(struct amdgpu_device *adev)
 	int r = 0;
 
 	if (adev->kfd.dev)
-		r = kgd2kfd->post_reset(adev->kfd.dev);
+		r = kgd2kfd_post_reset(adev->kfd.dev);
 
 	return r;
 }

drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_fence.c

@@ -31,7 +31,6 @@
 
 static const struct dma_fence_ops amdkfd_fence_ops;
 static atomic_t fence_seq = ATOMIC_INIT(0);
-extern const struct kgd2kfd_calls *kgd2kfd;
 
 /* Eviction Fence
  * Fence helper functions to deal with KFD memory eviction.
@@ -123,7 +122,7 @@ static bool amdkfd_fence_enable_signaling(struct dma_fence *f)
 	if (dma_fence_is_signaled(f))
 		return true;
 
-	if (!kgd2kfd->schedule_evict_and_restore_process(fence->mm, f))
+	if (!kgd2kfd_schedule_evict_and_restore_process(fence->mm, f))
 		return true;
 
 	return false;

drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c

@@ -44,8 +44,6 @@
  */
 #define AMDGPU_USERPTR_RESTORE_DELAY_MS 1
 
-extern const struct kgd2kfd_calls *kgd2kfd;
-
 /* Impose limit on how much memory KFD can use */
 static struct {
 	uint64_t max_system_mem_limit;
@@ -1792,7 +1790,7 @@ int amdgpu_amdkfd_evict_userptr(struct kgd_mem *mem,
 	evicted_bos = atomic_inc_return(&process_info->evicted_bos);
 	if (evicted_bos == 1) {
 		/* First eviction, stop the queues */
-		r = kgd2kfd->quiesce_mm(mm);
+		r = kgd2kfd_quiesce_mm(mm);
 		if (r)
 			pr_err("Failed to quiesce KFD\n");
 		schedule_delayed_work(&process_info->restore_userptr_work,
@@ -2084,7 +2082,7 @@ static void amdgpu_amdkfd_restore_userptr_worker(struct work_struct *work)
 	    evicted_bos)
 		goto unlock_out;
 	evicted_bos = 0;
-	if (kgd2kfd->resume_mm(mm)) {
+	if (kgd2kfd_resume_mm(mm)) {
 		pr_err("%s: Failed to resume KFD\n", __func__);
 		/* No recovery from this failure. Probably the CP is
 		 * hanging. No point trying again.