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1 | /* |
2 | * Copyright 2008 Advanced Micro Devices, Inc. | |
3 | * Copyright 2008 Red Hat Inc. | |
4 | * Copyright 2009 Jerome Glisse. | |
5 | * | |
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: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
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. | |
23 | * | |
24 | * Authors: Dave Airlie | |
25 | * Alex Deucher | |
26 | * Jerome Glisse | |
27 | * Christian König | |
28 | */ | |
29 | #include <drm/drmP.h> | |
30 | #include "radeon.h" | |
31 | ||
32 | /* | |
33 | * IB | |
34 | * IBs (Indirect Buffers) and areas of GPU accessible memory where | |
35 | * commands are stored. You can put a pointer to the IB in the | |
36 | * command ring and the hw will fetch the commands from the IB | |
37 | * and execute them. Generally userspace acceleration drivers | |
38 | * produce command buffers which are send to the kernel and | |
39 | * put in IBs for execution by the requested ring. | |
40 | */ | |
41 | static int radeon_debugfs_sa_init(struct radeon_device *rdev); | |
42 | ||
43 | /** | |
44 | * radeon_ib_get - request an IB (Indirect Buffer) | |
45 | * | |
46 | * @rdev: radeon_device pointer | |
47 | * @ring: ring index the IB is associated with | |
48 | * @ib: IB object returned | |
49 | * @size: requested IB size | |
50 | * | |
51 | * Request an IB (all asics). IBs are allocated using the | |
52 | * suballocator. | |
53 | * Returns 0 on success, error on failure. | |
54 | */ | |
55 | int radeon_ib_get(struct radeon_device *rdev, int ring, | |
56 | struct radeon_ib *ib, struct radeon_vm *vm, | |
57 | unsigned size) | |
58 | { | |
59 | int r; | |
60 | ||
61 | r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo, &ib->sa_bo, size, 256); | |
62 | if (r) { | |
63 | dev_err(rdev->dev, "failed to get a new IB (%d)\n", r); | |
64 | return r; | |
65 | } | |
66 | ||
67 | r = radeon_semaphore_create(rdev, &ib->semaphore); | |
68 | if (r) { | |
69 | return r; | |
70 | } | |
71 | ||
72 | ib->ring = ring; | |
73 | ib->fence = NULL; | |
74 | ib->ptr = radeon_sa_bo_cpu_addr(ib->sa_bo); | |
75 | ib->vm = vm; | |
76 | if (vm) { | |
77 | /* ib pool is bound at RADEON_VA_IB_OFFSET in virtual address | |
78 | * space and soffset is the offset inside the pool bo | |
79 | */ | |
80 | ib->gpu_addr = ib->sa_bo->soffset + RADEON_VA_IB_OFFSET; | |
81 | } else { | |
82 | ib->gpu_addr = radeon_sa_bo_gpu_addr(ib->sa_bo); | |
83 | } | |
84 | ib->is_const_ib = false; | |
85 | ||
86 | return 0; | |
87 | } | |
88 | ||
89 | /** | |
90 | * radeon_ib_free - free an IB (Indirect Buffer) | |
91 | * | |
92 | * @rdev: radeon_device pointer | |
93 | * @ib: IB object to free | |
94 | * | |
95 | * Free an IB (all asics). | |
96 | */ | |
97 | void radeon_ib_free(struct radeon_device *rdev, struct radeon_ib *ib) | |
98 | { | |
99 | radeon_semaphore_free(rdev, &ib->semaphore, ib->fence); | |
100 | radeon_sa_bo_free(rdev, &ib->sa_bo, ib->fence); | |
101 | radeon_fence_unref(&ib->fence); | |
102 | } | |
103 | ||
104 | /** | |
105 | * radeon_ib_schedule - schedule an IB (Indirect Buffer) on the ring | |
106 | * | |
107 | * @rdev: radeon_device pointer | |
108 | * @ib: IB object to schedule | |
109 | * @const_ib: Const IB to schedule (SI only) | |
110 | * | |
111 | * Schedule an IB on the associated ring (all asics). | |
112 | * Returns 0 on success, error on failure. | |
113 | * | |
114 | * On SI, there are two parallel engines fed from the primary ring, | |
115 | * the CE (Constant Engine) and the DE (Drawing Engine). Since | |
116 | * resource descriptors have moved to memory, the CE allows you to | |
117 | * prime the caches while the DE is updating register state so that | |
118 | * the resource descriptors will be already in cache when the draw is | |
119 | * processed. To accomplish this, the userspace driver submits two | |
120 | * IBs, one for the CE and one for the DE. If there is a CE IB (called | |
121 | * a CONST_IB), it will be put on the ring prior to the DE IB. Prior | |
122 | * to SI there was just a DE IB. | |
123 | */ | |
124 | int radeon_ib_schedule(struct radeon_device *rdev, struct radeon_ib *ib, | |
125 | struct radeon_ib *const_ib) | |
126 | { | |
127 | struct radeon_ring *ring = &rdev->ring[ib->ring]; | |
128 | int r = 0; | |
129 | ||
130 | if (!ib->length_dw || !ring->ready) { | |
131 | /* TODO: Nothings in the ib we should report. */ | |
132 | dev_err(rdev->dev, "couldn't schedule ib\n"); | |
133 | return -EINVAL; | |
134 | } | |
135 | ||
136 | /* 64 dwords should be enough for fence too */ | |
137 | r = radeon_ring_lock(rdev, ring, 64 + RADEON_NUM_SYNCS * 8); | |
138 | if (r) { | |
139 | dev_err(rdev->dev, "scheduling IB failed (%d).\n", r); | |
140 | return r; | |
141 | } | |
142 | ||
143 | /* grab a vm id if necessary */ | |
144 | if (ib->vm) { | |
145 | struct radeon_fence *vm_id_fence; | |
146 | vm_id_fence = radeon_vm_grab_id(rdev, ib->vm, ib->ring); | |
147 | radeon_semaphore_sync_to(ib->semaphore, vm_id_fence); | |
148 | } | |
149 | ||
150 | /* sync with other rings */ | |
151 | r = radeon_semaphore_sync_rings(rdev, ib->semaphore, ib->ring); | |
152 | if (r) { | |
153 | dev_err(rdev->dev, "failed to sync rings (%d)\n", r); | |
154 | radeon_ring_unlock_undo(rdev, ring); | |
155 | return r; | |
156 | } | |
157 | ||
158 | if (ib->vm) | |
159 | radeon_vm_flush(rdev, ib->vm, ib->ring); | |
160 | ||
161 | if (const_ib) { | |
162 | radeon_ring_ib_execute(rdev, const_ib->ring, const_ib); | |
163 | radeon_semaphore_free(rdev, &const_ib->semaphore, NULL); | |
164 | } | |
165 | radeon_ring_ib_execute(rdev, ib->ring, ib); | |
166 | r = radeon_fence_emit(rdev, &ib->fence, ib->ring); | |
167 | if (r) { | |
168 | dev_err(rdev->dev, "failed to emit fence for new IB (%d)\n", r); | |
169 | radeon_ring_unlock_undo(rdev, ring); | |
170 | return r; | |
171 | } | |
172 | if (const_ib) { | |
173 | const_ib->fence = radeon_fence_ref(ib->fence); | |
174 | } | |
175 | ||
176 | if (ib->vm) | |
177 | radeon_vm_fence(rdev, ib->vm, ib->fence); | |
178 | ||
179 | radeon_ring_unlock_commit(rdev, ring); | |
180 | return 0; | |
181 | } | |
182 | ||
183 | /** | |
184 | * radeon_ib_pool_init - Init the IB (Indirect Buffer) pool | |
185 | * | |
186 | * @rdev: radeon_device pointer | |
187 | * | |
188 | * Initialize the suballocator to manage a pool of memory | |
189 | * for use as IBs (all asics). | |
190 | * Returns 0 on success, error on failure. | |
191 | */ | |
192 | int radeon_ib_pool_init(struct radeon_device *rdev) | |
193 | { | |
194 | int r; | |
195 | ||
196 | if (rdev->ib_pool_ready) { | |
197 | return 0; | |
198 | } | |
199 | ||
200 | if (rdev->family >= CHIP_BONAIRE) { | |
201 | r = radeon_sa_bo_manager_init(rdev, &rdev->ring_tmp_bo, | |
202 | RADEON_IB_POOL_SIZE*64*1024, | |
203 | RADEON_GPU_PAGE_SIZE, | |
204 | RADEON_GEM_DOMAIN_GTT, | |
205 | RADEON_GEM_GTT_WC); | |
206 | } else { | |
207 | /* Before CIK, it's better to stick to cacheable GTT due | |
208 | * to the command stream checking | |
209 | */ | |
210 | r = radeon_sa_bo_manager_init(rdev, &rdev->ring_tmp_bo, | |
211 | RADEON_IB_POOL_SIZE*64*1024, | |
212 | RADEON_GPU_PAGE_SIZE, | |
213 | RADEON_GEM_DOMAIN_GTT, 0); | |
214 | } | |
215 | if (r) { | |
216 | return r; | |
217 | } | |
218 | ||
219 | r = radeon_sa_bo_manager_start(rdev, &rdev->ring_tmp_bo); | |
220 | if (r) { | |
221 | return r; | |
222 | } | |
223 | ||
224 | rdev->ib_pool_ready = true; | |
225 | if (radeon_debugfs_sa_init(rdev)) { | |
226 | dev_err(rdev->dev, "failed to register debugfs file for SA\n"); | |
227 | } | |
228 | return 0; | |
229 | } | |
230 | ||
231 | /** | |
232 | * radeon_ib_pool_fini - Free the IB (Indirect Buffer) pool | |
233 | * | |
234 | * @rdev: radeon_device pointer | |
235 | * | |
236 | * Tear down the suballocator managing the pool of memory | |
237 | * for use as IBs (all asics). | |
238 | */ | |
239 | void radeon_ib_pool_fini(struct radeon_device *rdev) | |
240 | { | |
241 | if (rdev->ib_pool_ready) { | |
242 | radeon_sa_bo_manager_suspend(rdev, &rdev->ring_tmp_bo); | |
243 | radeon_sa_bo_manager_fini(rdev, &rdev->ring_tmp_bo); | |
244 | rdev->ib_pool_ready = false; | |
245 | } | |
246 | } | |
247 | ||
248 | /** | |
249 | * radeon_ib_ring_tests - test IBs on the rings | |
250 | * | |
251 | * @rdev: radeon_device pointer | |
252 | * | |
253 | * Test an IB (Indirect Buffer) on each ring. | |
254 | * If the test fails, disable the ring. | |
255 | * Returns 0 on success, error if the primary GFX ring | |
256 | * IB test fails. | |
257 | */ | |
258 | int radeon_ib_ring_tests(struct radeon_device *rdev) | |
259 | { | |
260 | unsigned i; | |
261 | int r; | |
262 | ||
263 | for (i = 0; i < RADEON_NUM_RINGS; ++i) { | |
264 | struct radeon_ring *ring = &rdev->ring[i]; | |
265 | ||
266 | if (!ring->ready) | |
267 | continue; | |
268 | ||
269 | r = radeon_ib_test(rdev, i, ring); | |
270 | if (r) { | |
271 | ring->ready = false; | |
272 | rdev->needs_reset = false; | |
273 | ||
274 | if (i == RADEON_RING_TYPE_GFX_INDEX) { | |
275 | /* oh, oh, that's really bad */ | |
276 | DRM_ERROR("radeon: failed testing IB on GFX ring (%d).\n", r); | |
277 | rdev->accel_working = false; | |
278 | return r; | |
279 | ||
280 | } else { | |
281 | /* still not good, but we can live with it */ | |
282 | DRM_ERROR("radeon: failed testing IB on ring %d (%d).\n", i, r); | |
283 | } | |
284 | } | |
285 | } | |
286 | return 0; | |
287 | } | |
288 | ||
289 | /* | |
290 | * Debugfs info | |
291 | */ | |
292 | #if defined(CONFIG_DEBUG_FS) | |
293 | ||
294 | static int radeon_debugfs_sa_info(struct seq_file *m, void *data) | |
295 | { | |
296 | struct drm_info_node *node = (struct drm_info_node *) m->private; | |
297 | struct drm_device *dev = node->minor->dev; | |
298 | struct radeon_device *rdev = dev->dev_private; | |
299 | ||
300 | radeon_sa_bo_dump_debug_info(&rdev->ring_tmp_bo, m); | |
301 | ||
302 | return 0; | |
303 | ||
304 | } | |
305 | ||
306 | static struct drm_info_list radeon_debugfs_sa_list[] = { | |
307 | {"radeon_sa_info", &radeon_debugfs_sa_info, 0, NULL}, | |
308 | }; | |
309 | ||
310 | #endif | |
311 | ||
312 | static int radeon_debugfs_sa_init(struct radeon_device *rdev) | |
313 | { | |
314 | #if defined(CONFIG_DEBUG_FS) | |
315 | return radeon_debugfs_add_files(rdev, radeon_debugfs_sa_list, 1); | |
316 | #else | |
317 | return 0; | |
318 | #endif | |
319 | } |