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 bool qxl_nop_signaling(struct dma_fence *fence) 54 { 55 /* fences are always automatically signaled, so just pretend we did this.. */ 56 return true; 57 } 58 59 static long qxl_fence_wait(struct dma_fence *fence, bool intr, 60 signed long timeout) 61 { 62 struct qxl_device *qdev; 63 struct qxl_release *release; 64 int count = 0, sc = 0; 65 bool have_drawable_releases; 66 unsigned long cur, end = jiffies + timeout; 67 68 qdev = container_of(fence->lock, struct qxl_device, release_lock); 69 release = container_of(fence, struct qxl_release, base); 70 have_drawable_releases = release->type == QXL_RELEASE_DRAWABLE; 71 72 retry: 73 sc++; 74 75 if (dma_fence_is_signaled(fence)) 76 goto signaled; 77 78 qxl_io_notify_oom(qdev); 79 80 for (count = 0; count < 11; count++) { 81 if (!qxl_queue_garbage_collect(qdev, true)) 82 break; 83 84 if (dma_fence_is_signaled(fence)) 85 goto signaled; 86 } 87 88 if (dma_fence_is_signaled(fence)) 89 goto signaled; 90 91 if (have_drawable_releases || sc < 4) { 92 if (sc > 2) 93 /* back off */ 94 usleep_range(500, 1000); 95 96 if (time_after(jiffies, end)) 97 return 0; 98 99 if (have_drawable_releases && sc > 300) { 100 DMA_FENCE_WARN(fence, "failed to wait on release %llu " 101 "after spincount %d\n", 102 fence->context & ~0xf0000000, sc); 103 goto signaled; 104 } 105 goto retry; 106 } 107 /* 108 * yeah, original sync_obj_wait gave up after 3 spins when 109 * have_drawable_releases is not set. 110 */ 111 112 signaled: 113 cur = jiffies; 114 if (time_after(cur, end)) 115 return 0; 116 return end - cur; 117 } 118 119 static const struct dma_fence_ops qxl_fence_ops = { 120 .get_driver_name = qxl_get_driver_name, 121 .get_timeline_name = qxl_get_timeline_name, 122 .enable_signaling = qxl_nop_signaling, 123 .wait = qxl_fence_wait, 124 }; 125 126 static int 127 qxl_release_alloc(struct qxl_device *qdev, int type, 128 struct qxl_release **ret) 129 { 130 struct qxl_release *release; 131 int handle; 132 size_t size = sizeof(*release); 133 134 release = kmalloc(size, GFP_KERNEL); 135 if (!release) { 136 DRM_ERROR("Out of memory\n"); 137 return -ENOMEM; 138 } 139 release->base.ops = NULL; 140 release->type = type; 141 release->release_offset = 0; 142 release->surface_release_id = 0; 143 INIT_LIST_HEAD(&release->bos); 144 145 idr_preload(GFP_KERNEL); 146 spin_lock(&qdev->release_idr_lock); 147 handle = idr_alloc(&qdev->release_idr, release, 1, 0, GFP_NOWAIT); 148 release->base.seqno = ++qdev->release_seqno; 149 spin_unlock(&qdev->release_idr_lock); 150 idr_preload_end(); 151 if (handle < 0) { 152 kfree(release); 153 *ret = NULL; 154 return handle; 155 } 156 *ret = release; 157 DRM_DEBUG_DRIVER("allocated release %d\n", handle); 158 release->id = handle; 159 return handle; 160 } 161 162 static void 163 qxl_release_free_list(struct qxl_release *release) 164 { 165 while (!list_empty(&release->bos)) { 166 struct qxl_bo_list *entry; 167 struct qxl_bo *bo; 168 169 entry = container_of(release->bos.next, 170 struct qxl_bo_list, tv.head); 171 bo = to_qxl_bo(entry->tv.bo); 172 qxl_bo_unref(&bo); 173 list_del(&entry->tv.head); 174 kfree(entry); 175 } 176 } 177 178 void 179 qxl_release_free(struct qxl_device *qdev, 180 struct qxl_release *release) 181 { 182 DRM_DEBUG_DRIVER("release %d, type %d\n", release->id, release->type); 183 184 if (release->surface_release_id) 185 qxl_surface_id_dealloc(qdev, release->surface_release_id); 186 187 spin_lock(&qdev->release_idr_lock); 188 idr_remove(&qdev->release_idr, release->id); 189 spin_unlock(&qdev->release_idr_lock); 190 191 if (release->base.ops) { 192 WARN_ON(list_empty(&release->bos)); 193 qxl_release_free_list(release); 194 195 dma_fence_signal(&release->base); 196 dma_fence_put(&release->base); 197 } else { 198 qxl_release_free_list(release); 199 kfree(release); 200 } 201 } 202 203 static int qxl_release_bo_alloc(struct qxl_device *qdev, 204 struct qxl_bo **bo) 205 { 206 /* pin releases bo's they are too messy to evict */ 207 return qxl_bo_create(qdev, PAGE_SIZE, false, true, 208 QXL_GEM_DOMAIN_VRAM, NULL, bo); 209 } 210 211 int qxl_release_list_add(struct qxl_release *release, struct qxl_bo *bo) 212 { 213 struct qxl_bo_list *entry; 214 215 list_for_each_entry(entry, &release->bos, tv.head) { 216 if (entry->tv.bo == &bo->tbo) 217 return 0; 218 } 219 220 entry = kmalloc(sizeof(struct qxl_bo_list), GFP_KERNEL); 221 if (!entry) 222 return -ENOMEM; 223 224 qxl_bo_ref(bo); 225 entry->tv.bo = &bo->tbo; 226 entry->tv.shared = false; 227 list_add_tail(&entry->tv.head, &release->bos); 228 return 0; 229 } 230 231 static int qxl_release_validate_bo(struct qxl_bo *bo) 232 { 233 struct ttm_operation_ctx ctx = { true, false }; 234 int ret; 235 236 if (!bo->pin_count) { 237 qxl_ttm_placement_from_domain(bo, bo->type, false); 238 ret = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); 239 if (ret) 240 return ret; 241 } 242 243 ret = reservation_object_reserve_shared(bo->tbo.resv); 244 if (ret) 245 return ret; 246 247 /* allocate a surface for reserved + validated buffers */ 248 ret = qxl_bo_check_id(bo->gem_base.dev->dev_private, bo); 249 if (ret) 250 return ret; 251 return 0; 252 } 253 254 int qxl_release_reserve_list(struct qxl_release *release, bool no_intr) 255 { 256 int ret; 257 struct qxl_bo_list *entry; 258 259 /* if only one object on the release its the release itself 260 since these objects are pinned no need to reserve */ 261 if (list_is_singular(&release->bos)) 262 return 0; 263 264 ret = ttm_eu_reserve_buffers(&release->ticket, &release->bos, 265 !no_intr, NULL); 266 if (ret) 267 return ret; 268 269 list_for_each_entry(entry, &release->bos, tv.head) { 270 struct qxl_bo *bo = to_qxl_bo(entry->tv.bo); 271 272 ret = qxl_release_validate_bo(bo); 273 if (ret) { 274 ttm_eu_backoff_reservation(&release->ticket, &release->bos); 275 return ret; 276 } 277 } 278 return 0; 279 } 280 281 void qxl_release_backoff_reserve_list(struct qxl_release *release) 282 { 283 /* if only one object on the release its the release itself 284 since these objects are pinned no need to reserve */ 285 if (list_is_singular(&release->bos)) 286 return; 287 288 ttm_eu_backoff_reservation(&release->ticket, &release->bos); 289 } 290 291 292 int qxl_alloc_surface_release_reserved(struct qxl_device *qdev, 293 enum qxl_surface_cmd_type surface_cmd_type, 294 struct qxl_release *create_rel, 295 struct qxl_release **release) 296 { 297 if (surface_cmd_type == QXL_SURFACE_CMD_DESTROY && create_rel) { 298 int idr_ret; 299 struct qxl_bo_list *entry = list_first_entry(&create_rel->bos, struct qxl_bo_list, tv.head); 300 struct qxl_bo *bo; 301 union qxl_release_info *info; 302 303 /* stash the release after the create command */ 304 idr_ret = qxl_release_alloc(qdev, QXL_RELEASE_SURFACE_CMD, release); 305 if (idr_ret < 0) 306 return idr_ret; 307 bo = to_qxl_bo(entry->tv.bo); 308 309 (*release)->release_offset = create_rel->release_offset + 64; 310 311 qxl_release_list_add(*release, bo); 312 313 info = qxl_release_map(qdev, *release); 314 info->id = idr_ret; 315 qxl_release_unmap(qdev, *release, info); 316 return 0; 317 } 318 319 return qxl_alloc_release_reserved(qdev, sizeof(struct qxl_surface_cmd), 320 QXL_RELEASE_SURFACE_CMD, release, NULL); 321 } 322 323 int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size, 324 int type, struct qxl_release **release, 325 struct qxl_bo **rbo) 326 { 327 struct qxl_bo *bo; 328 int idr_ret; 329 int ret = 0; 330 union qxl_release_info *info; 331 int cur_idx; 332 333 if (type == QXL_RELEASE_DRAWABLE) 334 cur_idx = 0; 335 else if (type == QXL_RELEASE_SURFACE_CMD) 336 cur_idx = 1; 337 else if (type == QXL_RELEASE_CURSOR_CMD) 338 cur_idx = 2; 339 else { 340 DRM_ERROR("got illegal type: %d\n", type); 341 return -EINVAL; 342 } 343 344 idr_ret = qxl_release_alloc(qdev, type, release); 345 if (idr_ret < 0) { 346 if (rbo) 347 *rbo = NULL; 348 return idr_ret; 349 } 350 351 mutex_lock(&qdev->release_mutex); 352 if (qdev->current_release_bo_offset[cur_idx] + 1 >= releases_per_bo[cur_idx]) { 353 qxl_bo_unref(&qdev->current_release_bo[cur_idx]); 354 qdev->current_release_bo_offset[cur_idx] = 0; 355 qdev->current_release_bo[cur_idx] = NULL; 356 } 357 if (!qdev->current_release_bo[cur_idx]) { 358 ret = qxl_release_bo_alloc(qdev, &qdev->current_release_bo[cur_idx]); 359 if (ret) { 360 mutex_unlock(&qdev->release_mutex); 361 qxl_release_free(qdev, *release); 362 return ret; 363 } 364 } 365 366 bo = qxl_bo_ref(qdev->current_release_bo[cur_idx]); 367 368 (*release)->release_offset = qdev->current_release_bo_offset[cur_idx] * release_size_per_bo[cur_idx]; 369 qdev->current_release_bo_offset[cur_idx]++; 370 371 if (rbo) 372 *rbo = bo; 373 374 mutex_unlock(&qdev->release_mutex); 375 376 ret = qxl_release_list_add(*release, bo); 377 qxl_bo_unref(&bo); 378 if (ret) { 379 qxl_release_free(qdev, *release); 380 return ret; 381 } 382 383 info = qxl_release_map(qdev, *release); 384 info->id = idr_ret; 385 qxl_release_unmap(qdev, *release, info); 386 387 return ret; 388 } 389 390 struct qxl_release *qxl_release_from_id_locked(struct qxl_device *qdev, 391 uint64_t id) 392 { 393 struct qxl_release *release; 394 395 spin_lock(&qdev->release_idr_lock); 396 release = idr_find(&qdev->release_idr, id); 397 spin_unlock(&qdev->release_idr_lock); 398 if (!release) { 399 DRM_ERROR("failed to find id in release_idr\n"); 400 return NULL; 401 } 402 403 return release; 404 } 405 406 union qxl_release_info *qxl_release_map(struct qxl_device *qdev, 407 struct qxl_release *release) 408 { 409 void *ptr; 410 union qxl_release_info *info; 411 struct qxl_bo_list *entry = list_first_entry(&release->bos, struct qxl_bo_list, tv.head); 412 struct qxl_bo *bo = to_qxl_bo(entry->tv.bo); 413 414 ptr = qxl_bo_kmap_atomic_page(qdev, bo, release->release_offset & PAGE_SIZE); 415 if (!ptr) 416 return NULL; 417 info = ptr + (release->release_offset & ~PAGE_SIZE); 418 return info; 419 } 420 421 void qxl_release_unmap(struct qxl_device *qdev, 422 struct qxl_release *release, 423 union qxl_release_info *info) 424 { 425 struct qxl_bo_list *entry = list_first_entry(&release->bos, struct qxl_bo_list, tv.head); 426 struct qxl_bo *bo = to_qxl_bo(entry->tv.bo); 427 void *ptr; 428 429 ptr = ((void *)info) - (release->release_offset & ~PAGE_SIZE); 430 qxl_bo_kunmap_atomic_page(qdev, bo, ptr); 431 } 432 433 void qxl_release_fence_buffer_objects(struct qxl_release *release) 434 { 435 struct ttm_buffer_object *bo; 436 struct ttm_bo_global *glob; 437 struct ttm_bo_device *bdev; 438 struct ttm_bo_driver *driver; 439 struct qxl_bo *qbo; 440 struct ttm_validate_buffer *entry; 441 struct qxl_device *qdev; 442 443 /* if only one object on the release its the release itself 444 since these objects are pinned no need to reserve */ 445 if (list_is_singular(&release->bos) || list_empty(&release->bos)) 446 return; 447 448 bo = list_first_entry(&release->bos, struct ttm_validate_buffer, head)->bo; 449 bdev = bo->bdev; 450 qdev = container_of(bdev, struct qxl_device, mman.bdev); 451 452 /* 453 * Since we never really allocated a context and we don't want to conflict, 454 * set the highest bits. This will break if we really allow exporting of dma-bufs. 455 */ 456 dma_fence_init(&release->base, &qxl_fence_ops, &qdev->release_lock, 457 release->id | 0xf0000000, release->base.seqno); 458 trace_dma_fence_emit(&release->base); 459 460 driver = bdev->driver; 461 glob = bo->glob; 462 463 spin_lock(&glob->lru_lock); 464 465 list_for_each_entry(entry, &release->bos, head) { 466 bo = entry->bo; 467 qbo = to_qxl_bo(bo); 468 469 reservation_object_add_shared_fence(bo->resv, &release->base); 470 ttm_bo_add_to_lru(bo); 471 reservation_object_unlock(bo->resv); 472 } 473 spin_unlock(&glob->lru_lock); 474 ww_acquire_fini(&release->ticket); 475 } 476 477