예제 #1
0
/**
 * amdgpu_ib_schedule - schedule an IB (Indirect Buffer) on the ring
 *
 * @adev: amdgpu_device pointer
 * @num_ibs: number of IBs to schedule
 * @ibs: IB objects to schedule
 * @f: fence created during this submission
 *
 * Schedule an IB on the associated ring (all asics).
 * Returns 0 on success, error on failure.
 *
 * On SI, there are two parallel engines fed from the primary ring,
 * the CE (Constant Engine) and the DE (Drawing Engine).  Since
 * resource descriptors have moved to memory, the CE allows you to
 * prime the caches while the DE is updating register state so that
 * the resource descriptors will be already in cache when the draw is
 * processed.  To accomplish this, the userspace driver submits two
 * IBs, one for the CE and one for the DE.  If there is a CE IB (called
 * a CONST_IB), it will be put on the ring prior to the DE IB.  Prior
 * to SI there was just a DE IB.
 */
int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs,
		       struct amdgpu_ib *ibs, struct amdgpu_job *job,
		       struct dma_fence **f)
{
	struct amdgpu_device *adev = ring->adev;
	struct amdgpu_ib *ib = &ibs[0];
	struct dma_fence *tmp = NULL;
	bool skip_preamble, need_ctx_switch;
	unsigned patch_offset = ~0;
	struct amdgpu_vm *vm;
	uint64_t fence_ctx;
	uint32_t status = 0, alloc_size;
	unsigned fence_flags = 0;

	unsigned i;
	int r = 0;
	bool need_pipe_sync = false;

	if (num_ibs == 0)
		return -EINVAL;

	/* ring tests don't use a job */
	if (job) {
		vm = job->vm;
		fence_ctx = job->base.s_fence->scheduled.context;
	} else {
		vm = NULL;
		fence_ctx = 0;
	}

	if (!ring->sched.ready) {
		dev_err(adev->dev, "couldn't schedule ib on ring <%s>\n", ring->name);
		return -EINVAL;
	}

	if (vm && !job->vmid) {
		dev_err(adev->dev, "VM IB without ID\n");
		return -EINVAL;
	}

	alloc_size = ring->funcs->emit_frame_size + num_ibs *
		ring->funcs->emit_ib_size;

	r = amdgpu_ring_alloc(ring, alloc_size);
	if (r) {
		dev_err(adev->dev, "scheduling IB failed (%d).\n", r);
		return r;
	}

	need_ctx_switch = ring->current_ctx != fence_ctx;
	if (ring->funcs->emit_pipeline_sync && job &&
	    ((tmp = amdgpu_sync_get_fence(&job->sched_sync, NULL)) ||
	     (amdgpu_sriov_vf(adev) && need_ctx_switch) ||
	     amdgpu_vm_need_pipeline_sync(ring, job))) {
		need_pipe_sync = true;

		if (tmp)
			trace_amdgpu_ib_pipe_sync(job, tmp);

		dma_fence_put(tmp);
	}

	if (ring->funcs->insert_start)
		ring->funcs->insert_start(ring);

	if (job) {
		r = amdgpu_vm_flush(ring, job, need_pipe_sync);
		if (r) {
			amdgpu_ring_undo(ring);
			return r;
		}
	}

	if (job && ring->funcs->init_cond_exec)
		patch_offset = amdgpu_ring_init_cond_exec(ring);

#ifdef CONFIG_X86_64
	if (!(adev->flags & AMD_IS_APU))
#endif
	{
		if (ring->funcs->emit_hdp_flush)
			amdgpu_ring_emit_hdp_flush(ring);
		else
			amdgpu_asic_flush_hdp(adev, ring);
	}

	if (need_ctx_switch)
		status |= AMDGPU_HAVE_CTX_SWITCH;

	skip_preamble = ring->current_ctx == fence_ctx;
	if (job && ring->funcs->emit_cntxcntl) {
		status |= job->preamble_status;
		amdgpu_ring_emit_cntxcntl(ring, status);
	}

	for (i = 0; i < num_ibs; ++i) {
		ib = &ibs[i];

		/* drop preamble IBs if we don't have a context switch */
		if ((ib->flags & AMDGPU_IB_FLAG_PREAMBLE) &&
			skip_preamble &&
			!(status & AMDGPU_PREAMBLE_IB_PRESENT_FIRST) &&
			!amdgpu_sriov_vf(adev)) /* for SRIOV preemption, Preamble CE ib must be inserted anyway */
			continue;

		amdgpu_ring_emit_ib(ring, job, ib, status);
		status &= ~AMDGPU_HAVE_CTX_SWITCH;
	}

	if (ring->funcs->emit_tmz)
		amdgpu_ring_emit_tmz(ring, false);

#ifdef CONFIG_X86_64
	if (!(adev->flags & AMD_IS_APU))
#endif
		amdgpu_asic_invalidate_hdp(adev, ring);

	if (ib->flags & AMDGPU_IB_FLAG_TC_WB_NOT_INVALIDATE)
		fence_flags |= AMDGPU_FENCE_FLAG_TC_WB_ONLY;

	/* wrap the last IB with fence */
	if (job && job->uf_addr) {
		amdgpu_ring_emit_fence(ring, job->uf_addr, job->uf_sequence,
				       fence_flags | AMDGPU_FENCE_FLAG_64BIT);
	}

	r = amdgpu_fence_emit(ring, f, fence_flags);
	if (r) {
		dev_err(adev->dev, "failed to emit fence (%d)\n", r);
		if (job && job->vmid)
			amdgpu_vmid_reset(adev, ring->funcs->vmhub, job->vmid);
		amdgpu_ring_undo(ring);
		return r;
	}

	if (ring->funcs->insert_end)
		ring->funcs->insert_end(ring);

	if (patch_offset != ~0 && ring->funcs->patch_cond_exec)
		amdgpu_ring_patch_cond_exec(ring, patch_offset);

	ring->current_ctx = fence_ctx;
	if (vm && ring->funcs->emit_switch_buffer)
		amdgpu_ring_emit_switch_buffer(ring);
	amdgpu_ring_commit(ring);
	return 0;
}
예제 #2
0
파일: amdgpu_ib.c 프로젝트: 513855417/linux
/**
 * amdgpu_ib_schedule - schedule an IB (Indirect Buffer) on the ring
 *
 * @adev: amdgpu_device pointer
 * @num_ibs: number of IBs to schedule
 * @ibs: IB objects to schedule
 * @f: fence created during this submission
 *
 * Schedule an IB on the associated ring (all asics).
 * Returns 0 on success, error on failure.
 *
 * On SI, there are two parallel engines fed from the primary ring,
 * the CE (Constant Engine) and the DE (Drawing Engine).  Since
 * resource descriptors have moved to memory, the CE allows you to
 * prime the caches while the DE is updating register state so that
 * the resource descriptors will be already in cache when the draw is
 * processed.  To accomplish this, the userspace driver submits two
 * IBs, one for the CE and one for the DE.  If there is a CE IB (called
 * a CONST_IB), it will be put on the ring prior to the DE IB.  Prior
 * to SI there was just a DE IB.
 */
int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs,
		       struct amdgpu_ib *ibs, struct fence *last_vm_update,
		       struct amdgpu_job *job, struct fence **f)
{
	struct amdgpu_device *adev = ring->adev;
	struct amdgpu_ib *ib = &ibs[0];
	bool skip_preamble, need_ctx_switch;
	unsigned patch_offset = ~0;
	struct amdgpu_vm *vm;
	struct fence *hwf;
	uint64_t ctx;

	unsigned i;
	int r = 0;

	if (num_ibs == 0)
		return -EINVAL;

	/* ring tests don't use a job */
	if (job) {
		vm = job->vm;
		ctx = job->ctx;
	} else {
		vm = NULL;
		ctx = 0;
	}

	if (!ring->ready) {
		dev_err(adev->dev, "couldn't schedule ib\n");
		return -EINVAL;
	}

	if (vm && !job->vm_id) {
		dev_err(adev->dev, "VM IB without ID\n");
		return -EINVAL;
	}

	r = amdgpu_ring_alloc(ring, 256 * num_ibs);
	if (r) {
		dev_err(adev->dev, "scheduling IB failed (%d).\n", r);
		return r;
	}

	if (ring->type == AMDGPU_RING_TYPE_SDMA && ring->funcs->init_cond_exec)
		patch_offset = amdgpu_ring_init_cond_exec(ring);

	if (vm) {
		r = amdgpu_vm_flush(ring, job->vm_id, job->vm_pd_addr,
				    job->gds_base, job->gds_size,
				    job->gws_base, job->gws_size,
				    job->oa_base, job->oa_size);
		if (r) {
			amdgpu_ring_undo(ring);
			return r;
		}
	}

	if (ring->funcs->emit_hdp_flush)
		amdgpu_ring_emit_hdp_flush(ring);

	/* always set cond_exec_polling to CONTINUE */
	*ring->cond_exe_cpu_addr = 1;

	skip_preamble = ring->current_ctx == ctx;
	need_ctx_switch = ring->current_ctx != ctx;
	for (i = 0; i < num_ibs; ++i) {
		ib = &ibs[i];

		/* drop preamble IBs if we don't have a context switch */
		if ((ib->flags & AMDGPU_IB_FLAG_PREAMBLE) && skip_preamble)
			continue;

		amdgpu_ring_emit_ib(ring, ib, job ? job->vm_id : 0,
				    need_ctx_switch);
		need_ctx_switch = false;
	}

	if (ring->funcs->emit_hdp_invalidate)
		amdgpu_ring_emit_hdp_invalidate(ring);

	r = amdgpu_fence_emit(ring, &hwf);
	if (r) {
		dev_err(adev->dev, "failed to emit fence (%d)\n", r);
		if (job && job->vm_id)
			amdgpu_vm_reset_id(adev, job->vm_id);
		amdgpu_ring_undo(ring);
		return r;
	}

	/* wrap the last IB with fence */
	if (job && job->uf_bo) {
		uint64_t addr = amdgpu_bo_gpu_offset(job->uf_bo);

		addr += job->uf_offset;
		amdgpu_ring_emit_fence(ring, addr, job->uf_sequence,
				       AMDGPU_FENCE_FLAG_64BIT);
	}

	if (f)
		*f = fence_get(hwf);

	if (patch_offset != ~0 && ring->funcs->patch_cond_exec)
		amdgpu_ring_patch_cond_exec(ring, patch_offset);

	ring->current_ctx = ctx;
	amdgpu_ring_commit(ring);
	return 0;
}