2 * Copyright 2008 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
4 * Copyright 2009 Jerome Glisse.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
24 * Authors: Dave Airlie
29 #include <linux/seq_file.h>
30 #include <linux/slab.h>
32 #include <drm/amdgpu_drm.h>
38 * IBs (Indirect Buffers) and areas of GPU accessible memory where
39 * commands are stored. You can put a pointer to the IB in the
40 * command ring and the hw will fetch the commands from the IB
41 * and execute them. Generally userspace acceleration drivers
42 * produce command buffers which are send to the kernel and
43 * put in IBs for execution by the requested ring.
45 static int amdgpu_debugfs_sa_init(struct amdgpu_device *adev);
48 * amdgpu_ib_get - request an IB (Indirect Buffer)
50 * @ring: ring index the IB is associated with
51 * @size: requested IB size
52 * @ib: IB object returned
54 * Request an IB (all asics). IBs are allocated using the
56 * Returns 0 on success, error on failure.
58 int amdgpu_ib_get(struct amdgpu_device *adev, struct amdgpu_vm *vm,
59 unsigned size, struct amdgpu_ib *ib)
64 r = amdgpu_sa_bo_new(&adev->ring_tmp_bo,
65 &ib->sa_bo, size, 256);
67 dev_err(adev->dev, "failed to get a new IB (%d)\n", r);
71 ib->ptr = amdgpu_sa_bo_cpu_addr(ib->sa_bo);
74 ib->gpu_addr = amdgpu_sa_bo_gpu_addr(ib->sa_bo);
84 * amdgpu_ib_free - free an IB (Indirect Buffer)
86 * @adev: amdgpu_device pointer
87 * @ib: IB object to free
88 * @f: the fence SA bo need wait on for the ib alloation
90 * Free an IB (all asics).
92 void amdgpu_ib_free(struct amdgpu_device *adev, struct amdgpu_ib *ib, struct fence *f)
94 amdgpu_sa_bo_free(adev, &ib->sa_bo, f);
98 * amdgpu_ib_schedule - schedule an IB (Indirect Buffer) on the ring
100 * @adev: amdgpu_device pointer
101 * @num_ibs: number of IBs to schedule
102 * @ibs: IB objects to schedule
103 * @f: fence created during this submission
105 * Schedule an IB on the associated ring (all asics).
106 * Returns 0 on success, error on failure.
108 * On SI, there are two parallel engines fed from the primary ring,
109 * the CE (Constant Engine) and the DE (Drawing Engine). Since
110 * resource descriptors have moved to memory, the CE allows you to
111 * prime the caches while the DE is updating register state so that
112 * the resource descriptors will be already in cache when the draw is
113 * processed. To accomplish this, the userspace driver submits two
114 * IBs, one for the CE and one for the DE. If there is a CE IB (called
115 * a CONST_IB), it will be put on the ring prior to the DE IB. Prior
116 * to SI there was just a DE IB.
118 int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs,
119 struct amdgpu_ib *ibs, struct fence *last_vm_update,
122 struct amdgpu_device *adev = ring->adev;
123 struct amdgpu_ib *ib = &ibs[0];
124 struct amdgpu_ctx *ctx, *old_ctx;
125 struct amdgpu_vm *vm;
137 dev_err(adev->dev, "couldn't schedule ib\n");
141 if (vm && !ibs->vm_id) {
142 dev_err(adev->dev, "VM IB without ID\n");
146 r = amdgpu_ring_alloc(ring, 256 * num_ibs);
148 dev_err(adev->dev, "scheduling IB failed (%d).\n", r);
153 /* do context switch */
154 amdgpu_vm_flush(ring, ib->vm_id, ib->vm_pd_addr,
155 ib->gds_base, ib->gds_size,
156 ib->gws_base, ib->gws_size,
157 ib->oa_base, ib->oa_size);
159 if (ring->funcs->emit_hdp_flush)
160 amdgpu_ring_emit_hdp_flush(ring);
163 old_ctx = ring->current_ctx;
164 for (i = 0; i < num_ibs; ++i) {
167 if (ib->ctx != ctx || ib->vm != vm) {
168 ring->current_ctx = old_ctx;
170 amdgpu_vm_reset_id(adev, ib->vm_id);
171 amdgpu_ring_undo(ring);
174 amdgpu_ring_emit_ib(ring, ib);
175 ring->current_ctx = ctx;
179 if (ring->funcs->emit_hdp_invalidate)
180 amdgpu_ring_emit_hdp_invalidate(ring);
183 r = amdgpu_fence_emit(ring, &hwf);
185 dev_err(adev->dev, "failed to emit fence (%d)\n", r);
186 ring->current_ctx = old_ctx;
188 amdgpu_vm_reset_id(adev, ib->vm_id);
189 amdgpu_ring_undo(ring);
193 /* wrap the last IB with fence */
195 uint64_t addr = amdgpu_bo_gpu_offset(ib->user->bo);
196 addr += ib->user->offset;
197 amdgpu_ring_emit_fence(ring, addr, ib->sequence,
198 AMDGPU_FENCE_FLAG_64BIT);
204 amdgpu_ring_commit(ring);
209 * amdgpu_ib_pool_init - Init the IB (Indirect Buffer) pool
211 * @adev: amdgpu_device pointer
213 * Initialize the suballocator to manage a pool of memory
214 * for use as IBs (all asics).
215 * Returns 0 on success, error on failure.
217 int amdgpu_ib_pool_init(struct amdgpu_device *adev)
221 if (adev->ib_pool_ready) {
224 r = amdgpu_sa_bo_manager_init(adev, &adev->ring_tmp_bo,
225 AMDGPU_IB_POOL_SIZE*64*1024,
226 AMDGPU_GPU_PAGE_SIZE,
227 AMDGPU_GEM_DOMAIN_GTT);
232 r = amdgpu_sa_bo_manager_start(adev, &adev->ring_tmp_bo);
237 adev->ib_pool_ready = true;
238 if (amdgpu_debugfs_sa_init(adev)) {
239 dev_err(adev->dev, "failed to register debugfs file for SA\n");
245 * amdgpu_ib_pool_fini - Free the IB (Indirect Buffer) pool
247 * @adev: amdgpu_device pointer
249 * Tear down the suballocator managing the pool of memory
250 * for use as IBs (all asics).
252 void amdgpu_ib_pool_fini(struct amdgpu_device *adev)
254 if (adev->ib_pool_ready) {
255 amdgpu_sa_bo_manager_suspend(adev, &adev->ring_tmp_bo);
256 amdgpu_sa_bo_manager_fini(adev, &adev->ring_tmp_bo);
257 adev->ib_pool_ready = false;
262 * amdgpu_ib_ring_tests - test IBs on the rings
264 * @adev: amdgpu_device pointer
266 * Test an IB (Indirect Buffer) on each ring.
267 * If the test fails, disable the ring.
268 * Returns 0 on success, error if the primary GFX ring
271 int amdgpu_ib_ring_tests(struct amdgpu_device *adev)
276 for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
277 struct amdgpu_ring *ring = adev->rings[i];
279 if (!ring || !ring->ready)
282 r = amdgpu_ring_test_ib(ring);
286 if (ring == &adev->gfx.gfx_ring[0]) {
287 /* oh, oh, that's really bad */
288 DRM_ERROR("amdgpu: failed testing IB on GFX ring (%d).\n", r);
289 adev->accel_working = false;
293 /* still not good, but we can live with it */
294 DRM_ERROR("amdgpu: failed testing IB on ring %d (%d).\n", i, r);
304 #if defined(CONFIG_DEBUG_FS)
306 static int amdgpu_debugfs_sa_info(struct seq_file *m, void *data)
308 struct drm_info_node *node = (struct drm_info_node *) m->private;
309 struct drm_device *dev = node->minor->dev;
310 struct amdgpu_device *adev = dev->dev_private;
312 amdgpu_sa_bo_dump_debug_info(&adev->ring_tmp_bo, m);
318 static struct drm_info_list amdgpu_debugfs_sa_list[] = {
319 {"amdgpu_sa_info", &amdgpu_debugfs_sa_info, 0, NULL},
324 static int amdgpu_debugfs_sa_init(struct amdgpu_device *adev)
326 #if defined(CONFIG_DEBUG_FS)
327 return amdgpu_debugfs_add_files(adev, amdgpu_debugfs_sa_list, 1);