1 /* 2 * Copyright 2011 Red Hat, Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * on the rights to use, copy, modify, merge, publish, distribute, sub 8 * license, and/or sell copies of the Software, and to permit persons to whom 9 * the Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER 19 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 21 */ 22 #include "qxl_drv.h" 23 #include "qxl_object.h" 24 #include <trace/events/dma_fence.h> 25 26 /* 27 * drawable cmd cache - allocate a bunch of VRAM pages, suballocate 28 * into 256 byte chunks for now - gives 16 cmds per page. 29 * 30 * use an ida to index into the chunks? 31 */ 32 /* manage releaseables */ 33 /* stack them 16 high for now -drawable object is 191 */ 34 #define RELEASE_SIZE 256 35 #define RELEASES_PER_BO (4096 / RELEASE_SIZE) 36 /* put an alloc/dealloc surface cmd into one bo and round up to 128 */ 37 #define SURFACE_RELEASE_SIZE 128 38 #define SURFACE_RELEASES_PER_BO (4096 / SURFACE_RELEASE_SIZE) 39 40 static const int release_size_per_bo[] = { RELEASE_SIZE, SURFACE_RELEASE_SIZE, RELEASE_SIZE }; 41 static const int releases_per_bo[] = { RELEASES_PER_BO, SURFACE_RELEASES_PER_BO, RELEASES_PER_BO }; 42 43 static const char *qxl_get_driver_name(struct dma_fence *fence) 44 { 45 return "qxl"; 46 } 47 48 static const char *qxl_get_timeline_name(struct dma_fence *fence) 49 { 50 return "release"; 51 } 52 53 static long qxl_fence_wait(struct dma_fence *fence, bool intr, 54 signed long timeout) 55 { 56 struct qxl_device *qdev; 57 struct qxl_release *release; 58 int count = 0, sc = 0; 59 bool have_drawable_releases; 60 unsigned long cur, end = jiffies + timeout; 61 62 qdev = container_of(fence->lock, struct qxl_device, release_lock); 63 release = container_of(fence, struct qxl_release, base); 64 have_drawable_releases = release->type == QXL_RELEASE_DRAWABLE; 65 66 retry: 67 sc++; 68 69 if (dma_fence_is_signaled(fence)) 70 goto signaled; 71 72 qxl_io_notify_oom(qdev); 73 74 for (count = 0; count < 11; count++) { 75 if (!qxl_queue_garbage_collect(qdev, true)) 76 break; 77 78 if (dma_fence_is_signaled(fence)) 79 goto signaled; 80 } 81 82 if (dma_fence_is_signaled(fence)) 83 goto signaled; 84 85 if (have_drawable_releases || sc < 4) { 86 if (sc > 2) 87 /* back off */ 88 usleep_range(500, 1000); 89 90 if (time_after(jiffies, end)) 91 return 0; 92 93 if (have_drawable_releases && sc > 300) { 94 DMA_FENCE_WARN(fence, "failed to wait on release %llu " 95 "after spincount %d\n", 96 fence->context & ~0xf0000000, sc); 97 goto signaled; 98 } 99 goto retry; 100 } 101 /* 102 * yeah, original sync_obj_wait gave up after 3 spins when 103 * have_drawable_releases is not set. 104 */ 105 106 signaled: 107 cur = jiffies; 108 if (time_after(cur, end)) 109 return 0; 110 return end - cur; 111 } 112 113 static const struct dma_fence_ops qxl_fence_ops = { 114 .get_driver_name = qxl_get_driver_name, 115 .get_timeline_name = qxl_get_timeline_name, 116 .wait = qxl_fence_wait, 117 }; 118 119 static int 120 qxl_release_alloc(struct qxl_device *qdev, int type, 121 struct qxl_release **ret) 122 { 123 struct qxl_release *release; 124 int handle; 125 size_t size = sizeof(*release); 126 127 release = kmalloc(size, GFP_KERNEL); 128 if (!release) { 129 DRM_ERROR("Out of memory\n"); 130 return -ENOMEM; 131 } 132 release->base.ops = NULL; 133 release->type = type; 134 release->release_offset = 0; 135 release->surface_release_id = 0; 136 INIT_LIST_HEAD(&release->bos); 137 138 idr_preload(GFP_KERNEL); 139 spin_lock(&qdev->release_idr_lock); 140 handle = idr_alloc(&qdev->release_idr, release, 1, 0, GFP_NOWAIT); 141 release->base.seqno = ++qdev->release_seqno; 142 spin_unlock(&qdev->release_idr_lock); 143 idr_preload_end(); 144 if (handle < 0) { 145 kfree(release); 146 *ret = NULL; 147 return handle; 148 } 149 *ret = release; 150 DRM_DEBUG_DRIVER("allocated release %d\n", handle); 151 release->id = handle; 152 return handle; 153 } 154 155 static void 156 qxl_release_free_list(struct qxl_release *release) 157 { 158 while (!list_empty(&release->bos)) { 159 struct qxl_bo_list *entry; 160 struct qxl_bo *bo; 161 162 entry = container_of(release->bos.next, 163 struct qxl_bo_list, tv.head); 164 bo = to_qxl_bo(entry->tv.bo); 165 qxl_bo_unref(&bo); 166 list_del(&entry->tv.head); 167 kfree(entry); 168 } 169 release->release_bo = NULL; 170 } 171 172 void 173 qxl_release_free(struct qxl_device *qdev, 174 struct qxl_release *release) 175 { 176 DRM_DEBUG_DRIVER("release %d, type %d\n", release->id, release->type); 177 178 if (release->surface_release_id) 179 qxl_surface_id_dealloc(qdev, release->surface_release_id); 180 181 spin_lock(&qdev->release_idr_lock); 182 idr_remove(&qdev->release_idr, release->id); 183 spin_unlock(&qdev->release_idr_lock); 184 185 if (release->base.ops) { 186 WARN_ON(list_empty(&release->bos)); 187 qxl_release_free_list(release); 188 189 dma_fence_signal(&release->base); 190 dma_fence_put(&release->base); 191 } else { 192 qxl_release_free_list(release); 193 kfree(release); 194 } 195 } 196 197 static int qxl_release_bo_alloc(struct qxl_device *qdev, 198 struct qxl_bo **bo) 199 { 200 /* pin releases bo's they are too messy to evict */ 201 return qxl_bo_create(qdev, PAGE_SIZE, false, true, 202 QXL_GEM_DOMAIN_VRAM, NULL, bo); 203 } 204 205 int qxl_release_list_add(struct qxl_release *release, struct qxl_bo *bo) 206 { 207 struct qxl_bo_list *entry; 208 209 list_for_each_entry(entry, &release->bos, tv.head) { 210 if (entry->tv.bo == &bo->tbo) 211 return 0; 212 } 213 214 entry = kmalloc(sizeof(struct qxl_bo_list), GFP_KERNEL); 215 if (!entry) 216 return -ENOMEM; 217 218 qxl_bo_ref(bo); 219 entry->tv.bo = &bo->tbo; 220 entry->tv.num_shared = 0; 221 list_add_tail(&entry->tv.head, &release->bos); 222 return 0; 223 } 224 225 static int qxl_release_validate_bo(struct qxl_bo *bo) 226 { 227 struct ttm_operation_ctx ctx = { true, false }; 228 int ret; 229 230 if (!bo->pin_count) { 231 qxl_ttm_placement_from_domain(bo, bo->type, false); 232 ret = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); 233 if (ret) 234 return ret; 235 } 236 237 ret = reservation_object_reserve_shared(bo->tbo.resv, 1); 238 if (ret) 239 return ret; 240 241 /* allocate a surface for reserved + validated buffers */ 242 ret = qxl_bo_check_id(bo->gem_base.dev->dev_private, bo); 243 if (ret) 244 return ret; 245 return 0; 246 } 247 248 int qxl_release_reserve_list(struct qxl_release *release, bool no_intr) 249 { 250 int ret; 251 struct qxl_bo_list *entry; 252 253 /* if only one object on the release its the release itself 254 since these objects are pinned no need to reserve */ 255 if (list_is_singular(&release->bos)) 256 return 0; 257 258 ret = ttm_eu_reserve_buffers(&release->ticket, &release->bos, 259 !no_intr, NULL); 260 if (ret) 261 return ret; 262 263 list_for_each_entry(entry, &release->bos, tv.head) { 264 struct qxl_bo *bo = to_qxl_bo(entry->tv.bo); 265 266 ret = qxl_release_validate_bo(bo); 267 if (ret) { 268 ttm_eu_backoff_reservation(&release->ticket, &release->bos); 269 return ret; 270 } 271 } 272 return 0; 273 } 274 275 void qxl_release_backoff_reserve_list(struct qxl_release *release) 276 { 277 /* if only one object on the release its the release itself 278 since these objects are pinned no need to reserve */ 279 if (list_is_singular(&release->bos)) 280 return; 281 282 ttm_eu_backoff_reservation(&release->ticket, &release->bos); 283 } 284 285 int qxl_alloc_surface_release_reserved(struct qxl_device *qdev, 286 enum qxl_surface_cmd_type surface_cmd_type, 287 struct qxl_release *create_rel, 288 struct qxl_release **release) 289 { 290 if (surface_cmd_type == QXL_SURFACE_CMD_DESTROY && create_rel) { 291 int idr_ret; 292 struct qxl_bo *bo; 293 union qxl_release_info *info; 294 295 /* stash the release after the create command */ 296 idr_ret = qxl_release_alloc(qdev, QXL_RELEASE_SURFACE_CMD, release); 297 if (idr_ret < 0) 298 return idr_ret; 299 bo = create_rel->release_bo; 300 301 (*release)->release_bo = bo; 302 (*release)->release_offset = create_rel->release_offset + 64; 303 304 qxl_release_list_add(*release, bo); 305 306 info = qxl_release_map(qdev, *release); 307 info->id = idr_ret; 308 qxl_release_unmap(qdev, *release, info); 309 return 0; 310 } 311 312 return qxl_alloc_release_reserved(qdev, sizeof(struct qxl_surface_cmd), 313 QXL_RELEASE_SURFACE_CMD, release, NULL); 314 } 315 316 int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size, 317 int type, struct qxl_release **release, 318 struct qxl_bo **rbo) 319 { 320 struct qxl_bo *bo; 321 int idr_ret; 322 int ret = 0; 323 union qxl_release_info *info; 324 int cur_idx; 325 326 if (type == QXL_RELEASE_DRAWABLE) 327 cur_idx = 0; 328 else if (type == QXL_RELEASE_SURFACE_CMD) 329 cur_idx = 1; 330 else if (type == QXL_RELEASE_CURSOR_CMD) 331 cur_idx = 2; 332 else { 333 DRM_ERROR("got illegal type: %d\n", type); 334 return -EINVAL; 335 } 336 337 idr_ret = qxl_release_alloc(qdev, type, release); 338 if (idr_ret < 0) { 339 if (rbo) 340 *rbo = NULL; 341 return idr_ret; 342 } 343 344 mutex_lock(&qdev->release_mutex); 345 if (qdev->current_release_bo_offset[cur_idx] + 1 >= releases_per_bo[cur_idx]) { 346 qxl_bo_unref(&qdev->current_release_bo[cur_idx]); 347 qdev->current_release_bo_offset[cur_idx] = 0; 348 qdev->current_release_bo[cur_idx] = NULL; 349 } 350 if (!qdev->current_release_bo[cur_idx]) { 351 ret = qxl_release_bo_alloc(qdev, &qdev->current_release_bo[cur_idx]); 352 if (ret) { 353 mutex_unlock(&qdev->release_mutex); 354 qxl_release_free(qdev, *release); 355 return ret; 356 } 357 } 358 359 bo = qxl_bo_ref(qdev->current_release_bo[cur_idx]); 360 361 (*release)->release_bo = bo; 362 (*release)->release_offset = qdev->current_release_bo_offset[cur_idx] * release_size_per_bo[cur_idx]; 363 qdev->current_release_bo_offset[cur_idx]++; 364 365 if (rbo) 366 *rbo = bo; 367 368 mutex_unlock(&qdev->release_mutex); 369 370 ret = qxl_release_list_add(*release, bo); 371 qxl_bo_unref(&bo); 372 if (ret) { 373 qxl_release_free(qdev, *release); 374 return ret; 375 } 376 377 info = qxl_release_map(qdev, *release); 378 info->id = idr_ret; 379 qxl_release_unmap(qdev, *release, info); 380 381 return ret; 382 } 383 384 struct qxl_release *qxl_release_from_id_locked(struct qxl_device *qdev, 385 uint64_t id) 386 { 387 struct qxl_release *release; 388 389 spin_lock(&qdev->release_idr_lock); 390 release = idr_find(&qdev->release_idr, id); 391 spin_unlock(&qdev->release_idr_lock); 392 if (!release) { 393 DRM_ERROR("failed to find id in release_idr\n"); 394 return NULL; 395 } 396 397 return release; 398 } 399 400 union qxl_release_info *qxl_release_map(struct qxl_device *qdev, 401 struct qxl_release *release) 402 { 403 void *ptr; 404 union qxl_release_info *info; 405 struct qxl_bo *bo = release->release_bo; 406 407 ptr = qxl_bo_kmap_atomic_page(qdev, bo, release->release_offset & PAGE_MASK); 408 if (!ptr) 409 return NULL; 410 info = ptr + (release->release_offset & ~PAGE_MASK); 411 return info; 412 } 413 414 void qxl_release_unmap(struct qxl_device *qdev, 415 struct qxl_release *release, 416 union qxl_release_info *info) 417 { 418 struct qxl_bo *bo = release->release_bo; 419 void *ptr; 420 421 ptr = ((void *)info) - (release->release_offset & ~PAGE_MASK); 422 qxl_bo_kunmap_atomic_page(qdev, bo, ptr); 423 } 424 425 void qxl_release_fence_buffer_objects(struct qxl_release *release) 426 { 427 struct ttm_buffer_object *bo; 428 struct ttm_bo_global *glob; 429 struct ttm_bo_device *bdev; 430 struct ttm_validate_buffer *entry; 431 struct qxl_device *qdev; 432 433 /* if only one object on the release its the release itself 434 since these objects are pinned no need to reserve */ 435 if (list_is_singular(&release->bos) || list_empty(&release->bos)) 436 return; 437 438 bo = list_first_entry(&release->bos, struct ttm_validate_buffer, head)->bo; 439 bdev = bo->bdev; 440 qdev = container_of(bdev, struct qxl_device, mman.bdev); 441 442 /* 443 * Since we never really allocated a context and we don't want to conflict, 444 * set the highest bits. This will break if we really allow exporting of dma-bufs. 445 */ 446 dma_fence_init(&release->base, &qxl_fence_ops, &qdev->release_lock, 447 release->id | 0xf0000000, release->base.seqno); 448 trace_dma_fence_emit(&release->base); 449 450 glob = bdev->glob; 451 452 spin_lock(&glob->lru_lock); 453 454 list_for_each_entry(entry, &release->bos, head) { 455 bo = entry->bo; 456 457 reservation_object_add_shared_fence(bo->resv, &release->base); 458 ttm_bo_add_to_lru(bo); 459 reservation_object_unlock(bo->resv); 460 } 461 spin_unlock(&glob->lru_lock); 462 ww_acquire_fini(&release->ticket); 463 } 464 465