/* * Copyright 2008 Advanced Micro Devices, Inc. * Copyright 2008 Red Hat Inc. * Copyright 2009 Jerome Glisse. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Authors: Dave Airlie *          Alex Deucher *          Jerome Glisse *          Christian König */#include <linux/seq_file.h>#include <linux/slab.h>#include <drm/drmP.h>#include <drm/amdgpu_drm.h>#include "amdgpu.h"#include "atom.h" #define AMDGPU_IB_TEST_TIMEOUT	msecs_to_jiffies(1000) /* * IB * IBs (Indirect Buffers) and areas of GPU accessible memory where * commands are stored.  You can put a pointer to the IB in the * command ring and the hw will fetch the commands from the IB * and execute them.  Generally userspace acceleration drivers * produce command buffers which are send to the kernel and * put in IBs for execution by the requested ring. */static int amdgpu_debugfs_sa_init(struct amdgpu_device *adev); /** * amdgpu_ib_get - request an IB (Indirect Buffer) * * @ring: ring index the IB is associated with * @size: requested IB size * @ib: IB object returned * * Request an IB (all asics).  IBs are allocated using the * suballocator. * Returns 0 on success, error on failure. */int amdgpu_ib_get(struct amdgpu_device *adev, struct amdgpu_vm *vm,		  unsigned size, struct amdgpu_ib *ib){	int r; 	if (size) {		r = amdgpu_sa_bo_new(&adev->ring_tmp_bo,				      &ib->sa_bo, size, 256);		if (r) {			dev_err(adev->dev, "failed to get a new IB (%d)\n", r);			return r;		} 		ib->ptr = amdgpu_sa_bo_cpu_addr(ib->sa_bo); 		if (!vm)			ib->gpu_addr = amdgpu_sa_bo_gpu_addr(ib->sa_bo);	} 	return 0;} /** * amdgpu_ib_free - free an IB (Indirect Buffer) * * @adev: amdgpu_device pointer * @ib: IB object to free * @f: the fence SA bo need wait on for the ib alloation * * Free an IB (all asics). */void amdgpu_ib_free(struct amdgpu_device *adev, struct amdgpu_ib *ib,		    struct dma_fence *f){	amdgpu_sa_bo_free(adev, &ib->sa_bo, f);} /** * 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 i;	int r = 0; 	if (num_ibs == 0)		return -EINVAL; 	/* ring tests don't use a job */	if (job) {		vm = job->vm;		fence_ctx = job->fence_ctx;	} else {		vm = NULL;		fence_ctx = 0;	} 	if (!ring->ready) {		dev_err(adev->dev, "couldn't schedule ib on ring <%s>\n", ring->name);		return -EINVAL;	} 	if (vm && !job->vm_id) {		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;	} 	if (ring->funcs->emit_pipeline_sync && job &&	    ((tmp = amdgpu_sync_get_fence(&job->sched_sync)) ||	     amdgpu_vm_need_pipeline_sync(ring, job))) {		amdgpu_ring_emit_pipeline_sync(ring);		dma_fence_put(tmp);	} 	if (ring->funcs->insert_start)		ring->funcs->insert_start(ring); 	if (vm) {		r = amdgpu_vm_flush(ring, job);		if (r) {			amdgpu_ring_undo(ring);			return r;		}	} 	if (ring->funcs->init_cond_exec)		patch_offset = amdgpu_ring_init_cond_exec(ring); 	if (ring->funcs->emit_hdp_flush#ifdef CONFIG_X86_64	    && !(adev->flags & AMD_IS_APU)#endif	   )		amdgpu_ring_emit_hdp_flush(ring); 	skip_preamble = ring->current_ctx == fence_ctx;	need_ctx_switch = ring->current_ctx != fence_ctx;	if (job && ring->funcs->emit_cntxcntl) {		if (need_ctx_switch)			status |= AMDGPU_HAVE_CTX_SWITCH;		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, ib, job ? job->vm_id : 0,				    need_ctx_switch);		need_ctx_switch = false;	} 	if (ring->funcs->emit_tmz)		amdgpu_ring_emit_tmz(ring, false); 	if (ring->funcs->emit_hdp_invalidate#ifdef CONFIG_X86_64	    && !(adev->flags & AMD_IS_APU)#endif	   )		amdgpu_ring_emit_hdp_invalidate(ring); 	r = amdgpu_fence_emit(ring, f);	if (r) {		dev_err(adev->dev, "failed to emit fence (%d)\n", r);		if (job && job->vm_id)			amdgpu_vm_reset_id(adev, ring->funcs->vmhub,					   job->vm_id);		amdgpu_ring_undo(ring);		return r;	} 	if (ring->funcs->insert_end)		ring->funcs->insert_end(ring); 	/* wrap the last IB with fence */	if (job && job->uf_addr) {		amdgpu_ring_emit_fence(ring, job->uf_addr, job->uf_sequence,				       AMDGPU_FENCE_FLAG_64BIT);	} 	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;} /** * amdgpu_ib_pool_init - Init the IB (Indirect Buffer) pool * * @adev: amdgpu_device pointer * * Initialize the suballocator to manage a pool of memory * for use as IBs (all asics). * Returns 0 on success, error on failure. */int amdgpu_ib_pool_init(struct amdgpu_device *adev){	int r; 	if (adev->ib_pool_ready) {		return 0;	}	r = amdgpu_sa_bo_manager_init(adev, &adev->ring_tmp_bo,				      AMDGPU_IB_POOL_SIZE*64*1024,				      AMDGPU_GPU_PAGE_SIZE,				      AMDGPU_GEM_DOMAIN_GTT);	if (r) {		return r;	} 	r = amdgpu_sa_bo_manager_start(adev, &adev->ring_tmp_bo);	if (r) {		return r;	} 	adev->ib_pool_ready = true;	if (amdgpu_debugfs_sa_init(adev)) {		dev_err(adev->dev, "failed to register debugfs file for SA\n");	}	return 0;} /** * amdgpu_ib_pool_fini - Free the IB (Indirect Buffer) pool * * @adev: amdgpu_device pointer * * Tear down the suballocator managing the pool of memory * for use as IBs (all asics). */void amdgpu_ib_pool_fini(struct amdgpu_device *adev){	if (adev->ib_pool_ready) {		amdgpu_sa_bo_manager_suspend(adev, &adev->ring_tmp_bo);		amdgpu_sa_bo_manager_fini(adev, &adev->ring_tmp_bo);		adev->ib_pool_ready = false;	}} /** * amdgpu_ib_ring_tests - test IBs on the rings * * @adev: amdgpu_device pointer * * Test an IB (Indirect Buffer) on each ring. * If the test fails, disable the ring. * Returns 0 on success, error if the primary GFX ring * IB test fails. */int amdgpu_ib_ring_tests(struct amdgpu_device *adev){	unsigned i;	int r, ret = 0; 	for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {		struct amdgpu_ring *ring = adev->rings[i]; 		if (!ring || !ring->ready)			continue; 		r = amdgpu_ring_test_ib(ring, AMDGPU_IB_TEST_TIMEOUT);		if (r) {			ring->ready = false; 			if (ring == &adev->gfx.gfx_ring[0]) {				/* oh, oh, that's really bad */				DRM_ERROR("amdgpu: failed testing IB on GFX ring (%d).\n", r);				adev->accel_working = false;				return r; 			} else {				/* still not good, but we can live with it */				DRM_ERROR("amdgpu: failed testing IB on ring %d (%d).\n", i, r);				ret = r;			}		}	}	return ret;} /* * Debugfs info */#if defined(CONFIG_DEBUG_FS) static int amdgpu_debugfs_sa_info(struct seq_file *m, void *data){	struct drm_info_node *node = (struct drm_info_node *) m->private;	struct drm_device *dev = node->minor->dev;	struct amdgpu_device *adev = dev->dev_private; 	amdgpu_sa_bo_dump_debug_info(&adev->ring_tmp_bo, m); 	return 0; } static const struct drm_info_list amdgpu_debugfs_sa_list[] = {	{"amdgpu_sa_info", &amdgpu_debugfs_sa_info, 0, NULL},}; #endif static int amdgpu_debugfs_sa_init(struct amdgpu_device *adev){#if defined(CONFIG_DEBUG_FS)	return amdgpu_debugfs_add_files(adev, amdgpu_debugfs_sa_list, 1);#else	return 0;#endif}