drm/amdgpu: properly embed the IBs into the job

We now have standard macros for that.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -81,14 +81,10 @@ static enum drm_gpu_sched_stat amdgpu_job_timedout(struct drm_sched_job *s_job)
 int amdgpu_job_alloc(struct amdgpu_device *adev, unsigned num_ibs,
 		     struct amdgpu_job **job, struct amdgpu_vm *vm)
 {
-	size_t size = sizeof(struct amdgpu_job);
-
 	if (num_ibs == 0)
 		return -EINVAL;
 
-	size += sizeof(struct amdgpu_ib) * num_ibs;
-
-	*job = kzalloc(size, GFP_KERNEL);
+	*job = kzalloc(struct_size(*job, ibs, num_ibs), GFP_KERNEL);
 	if (!*job)
 		return -ENOMEM;
 
@@ -98,7 +94,6 @@ int amdgpu_job_alloc(struct amdgpu_device *adev, unsigned num_ibs,
 	 */
 	(*job)->base.sched = &adev->rings[0]->sched;
 	(*job)->vm = vm;
-	(*job)->ibs = (void *)&(*job)[1];
 	(*job)->num_ibs = num_ibs;
 
 	amdgpu_sync_create(&(*job)->sync);

drivers/gpu/drm/amd/amdgpu/amdgpu_job.h

@@ -25,6 +25,7 @@
 
 #include <drm/gpu_scheduler.h>
 #include "amdgpu_sync.h"
+#include "amdgpu_ring.h"
 
 /* bit set means command submit involves a preamble IB */
 #define AMDGPU_PREAMBLE_IB_PRESENT          (1 << 0)
@@ -48,12 +49,10 @@ struct amdgpu_job {
 	struct amdgpu_vm	*vm;
 	struct amdgpu_sync	sync;
 	struct amdgpu_sync	sched_sync;
-	struct amdgpu_ib	*ibs;
 	struct dma_fence	hw_fence;
 	struct dma_fence	*external_hw_fence;
 	uint32_t		preamble_status;
 	uint32_t                preemption_status;
-	uint32_t		num_ibs;
 	bool                    vm_needs_flush;
 	uint64_t		vm_pd_addr;
 	unsigned		vmid;
@@ -69,6 +68,9 @@ struct amdgpu_job {
 
 	/* job_run_counter >= 1 means a resubmit job */
 	uint32_t		job_run_counter;
+
+	uint32_t		num_ibs;
+	struct amdgpu_ib	ibs[];
 };
 
 int amdgpu_job_alloc(struct amdgpu_device *adev, unsigned num_ibs,