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>
36 #define AMDGPU_IB_TEST_TIMEOUT msecs_to_jiffies(1000)
40 * IBs (Indirect Buffers) and areas of GPU accessible memory where
41 * commands are stored. You can put a pointer to the IB in the
42 * command ring and the hw will fetch the commands from the IB
43 * and execute them. Generally userspace acceleration drivers
44 * produce command buffers which are send to the kernel and
45 * put in IBs for execution by the requested ring.
47 static int amdgpu_debugfs_sa_init(struct amdgpu_device *adev);
50 * amdgpu_ib_get - request an IB (Indirect Buffer)
52 * @ring: ring index the IB is associated with
53 * @size: requested IB size
54 * @ib: IB object returned
56 * Request an IB (all asics). IBs are allocated using the
58 * Returns 0 on success, error on failure.
60 int amdgpu_ib_get(struct amdgpu_device *adev, struct amdgpu_vm *vm,
61 unsigned size, struct amdgpu_ib *ib)
66 r = amdgpu_sa_bo_new(&adev->ring_tmp_bo,
67 &ib->sa_bo, size, 256);
69 dev_err(adev->dev, "failed to get a new IB (%d)\n", r);
73 ib->ptr = amdgpu_sa_bo_cpu_addr(ib->sa_bo);
76 ib->gpu_addr = amdgpu_sa_bo_gpu_addr(ib->sa_bo);
83 * amdgpu_ib_free - free an IB (Indirect Buffer)
85 * @adev: amdgpu_device pointer
86 * @ib: IB object to free
87 * @f: the fence SA bo need wait on for the ib alloation
89 * Free an IB (all asics).
91 void amdgpu_ib_free(struct amdgpu_device *adev, struct amdgpu_ib *ib,
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 dma_fence *last_vm_update,
120 struct amdgpu_job *job, struct dma_fence **f)
122 struct amdgpu_device *adev = ring->adev;
123 struct amdgpu_ib *ib = &ibs[0];
124 bool skip_preamble, need_ctx_switch;
125 unsigned patch_offset = ~0;
126 struct amdgpu_vm *vm;
128 uint32_t status = 0, alloc_size;
136 /* ring tests don't use a job */
139 fence_ctx = job->fence_ctx;
146 dev_err(adev->dev, "couldn't schedule ib on ring <%s>\n", ring->name);
150 if (vm && !job->vm_id) {
151 dev_err(adev->dev, "VM IB without ID\n");
155 alloc_size = ring->funcs->emit_frame_size + num_ibs *
156 ring->funcs->emit_ib_size;
158 r = amdgpu_ring_alloc(ring, alloc_size);
160 dev_err(adev->dev, "scheduling IB failed (%d).\n", r);
164 if (ring->funcs->init_cond_exec)
165 patch_offset = amdgpu_ring_init_cond_exec(ring);
168 r = amdgpu_vm_flush(ring, job);
170 amdgpu_ring_undo(ring);
175 if (ring->funcs->emit_hdp_flush)
176 amdgpu_ring_emit_hdp_flush(ring);
178 /* always set cond_exec_polling to CONTINUE */
179 *ring->cond_exe_cpu_addr = 1;
181 skip_preamble = ring->current_ctx == fence_ctx;
182 need_ctx_switch = ring->current_ctx != fence_ctx;
183 if (job && ring->funcs->emit_cntxcntl) {
185 status |= AMDGPU_HAVE_CTX_SWITCH;
186 status |= job->preamble_status;
187 amdgpu_ring_emit_cntxcntl(ring, status);
190 for (i = 0; i < num_ibs; ++i) {
193 /* drop preamble IBs if we don't have a context switch */
194 if ((ib->flags & AMDGPU_IB_FLAG_PREAMBLE) &&
196 !(status & AMDGPU_PREAMBLE_IB_PRESENT_FIRST))
199 amdgpu_ring_emit_ib(ring, ib, job ? job->vm_id : 0,
201 need_ctx_switch = false;
204 if (ring->funcs->emit_hdp_invalidate)
205 amdgpu_ring_emit_hdp_invalidate(ring);
207 r = amdgpu_fence_emit(ring, f);
209 dev_err(adev->dev, "failed to emit fence (%d)\n", r);
210 if (job && job->vm_id)
211 amdgpu_vm_reset_id(adev, job->vm_id);
212 amdgpu_ring_undo(ring);
216 /* wrap the last IB with fence */
217 if (job && job->uf_addr) {
218 amdgpu_ring_emit_fence(ring, job->uf_addr, job->uf_sequence,
219 AMDGPU_FENCE_FLAG_64BIT);
222 if (patch_offset != ~0 && ring->funcs->patch_cond_exec)
223 amdgpu_ring_patch_cond_exec(ring, patch_offset);
225 ring->current_ctx = fence_ctx;
226 if (ring->funcs->emit_switch_buffer)
227 amdgpu_ring_emit_switch_buffer(ring);
228 amdgpu_ring_commit(ring);
233 * amdgpu_ib_pool_init - Init the IB (Indirect Buffer) pool
235 * @adev: amdgpu_device pointer
237 * Initialize the suballocator to manage a pool of memory
238 * for use as IBs (all asics).
239 * Returns 0 on success, error on failure.
241 int amdgpu_ib_pool_init(struct amdgpu_device *adev)
245 if (adev->ib_pool_ready) {
248 r = amdgpu_sa_bo_manager_init(adev, &adev->ring_tmp_bo,
249 AMDGPU_IB_POOL_SIZE*64*1024,
250 AMDGPU_GPU_PAGE_SIZE,
251 AMDGPU_GEM_DOMAIN_GTT);
256 r = amdgpu_sa_bo_manager_start(adev, &adev->ring_tmp_bo);
261 adev->ib_pool_ready = true;
262 if (amdgpu_debugfs_sa_init(adev)) {
263 dev_err(adev->dev, "failed to register debugfs file for SA\n");
269 * amdgpu_ib_pool_fini - Free the IB (Indirect Buffer) pool
271 * @adev: amdgpu_device pointer
273 * Tear down the suballocator managing the pool of memory
274 * for use as IBs (all asics).
276 void amdgpu_ib_pool_fini(struct amdgpu_device *adev)
278 if (adev->ib_pool_ready) {
279 amdgpu_sa_bo_manager_suspend(adev, &adev->ring_tmp_bo);
280 amdgpu_sa_bo_manager_fini(adev, &adev->ring_tmp_bo);
281 adev->ib_pool_ready = false;
286 * amdgpu_ib_ring_tests - test IBs on the rings
288 * @adev: amdgpu_device pointer
290 * Test an IB (Indirect Buffer) on each ring.
291 * If the test fails, disable the ring.
292 * Returns 0 on success, error if the primary GFX ring
295 int amdgpu_ib_ring_tests(struct amdgpu_device *adev)
300 for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
301 struct amdgpu_ring *ring = adev->rings[i];
303 if (!ring || !ring->ready)
306 r = amdgpu_ring_test_ib(ring, AMDGPU_IB_TEST_TIMEOUT);
310 if (ring == &adev->gfx.gfx_ring[0]) {
311 /* oh, oh, that's really bad */
312 DRM_ERROR("amdgpu: failed testing IB on GFX ring (%d).\n", r);
313 adev->accel_working = false;
317 /* still not good, but we can live with it */
318 DRM_ERROR("amdgpu: failed testing IB on ring %d (%d).\n", i, r);
329 #if defined(CONFIG_DEBUG_FS)
331 static int amdgpu_debugfs_sa_info(struct seq_file *m, void *data)
333 struct drm_info_node *node = (struct drm_info_node *) m->private;
334 struct drm_device *dev = node->minor->dev;
335 struct amdgpu_device *adev = dev->dev_private;
337 amdgpu_sa_bo_dump_debug_info(&adev->ring_tmp_bo, m);
343 static const struct drm_info_list amdgpu_debugfs_sa_list[] = {
344 {"amdgpu_sa_info", &amdgpu_debugfs_sa_info, 0, NULL},
349 static int amdgpu_debugfs_sa_init(struct amdgpu_device *adev)
351 #if defined(CONFIG_DEBUG_FS)
352 return amdgpu_debugfs_add_files(adev, amdgpu_debugfs_sa_list, 1);