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 23 #include <linux/delay.h> 24 25 #include <trace/events/dma_fence.h> 26 27 #include "qxl_drv.h" 28 #include "qxl_object.h" 29 30 /* 31 * drawable cmd cache - allocate a bunch of VRAM pages, suballocate 32 * into 256 byte chunks for now - gives 16 cmds per page. 33 * 34 * use an ida to index into the chunks? 35 */ 36 /* manage releaseables */ 37 /* stack them 16 high for now -drawable object is 191 */ 38 #define RELEASE_SIZE 256 39 #define RELEASES_PER_BO (4096 / RELEASE_SIZE) 40 /* put an alloc/dealloc surface cmd into one bo and round up to 128 */ 41 #define SURFACE_RELEASE_SIZE 128 42 #define SURFACE_RELEASES_PER_BO (4096 / SURFACE_RELEASE_SIZE) 43 44 static const int release_size_per_bo[] = { RELEASE_SIZE, SURFACE_RELEASE_SIZE, RELEASE_SIZE }; 45 static const int releases_per_bo[] = { RELEASES_PER_BO, SURFACE_RELEASES_PER_BO, RELEASES_PER_BO }; 46 47 static const char *qxl_get_driver_name(struct dma_fence *fence) 48 { 49 return "qxl"; 50 } 51 52 static const char *qxl_get_timeline_name(struct dma_fence *fence) 53 { 54 return "release"; 55 } 56 57 static long qxl_fence_wait(struct dma_fence *fence, bool intr, 58 signed long timeout) 59 { 60 struct qxl_device *qdev; 61 struct qxl_release *release; 62 int count = 0, sc = 0; 63 bool have_drawable_releases; 64 unsigned long cur, end = jiffies + timeout; 65 66 qdev = container_of(fence->lock, struct qxl_device, release_lock); 67 release = container_of(fence, struct qxl_release, base); 68 have_drawable_releases = release->type == QXL_RELEASE_DRAWABLE; 69 70 retry: 71 sc++; 72 73 if (dma_fence_is_signaled(fence)) 74 goto signaled; 75 76 qxl_io_notify_oom(qdev); 77 78 for (count = 0; count < 11; count++) { 79 if (!qxl_queue_garbage_collect(qdev, true)) 80 break; 81 82 if (dma_fence_is_signaled(fence)) 83 goto signaled; 84 } 85 86 if (dma_fence_is_signaled(fence)) 87 goto signaled; 88 89 if (have_drawable_releases || sc < 4) { 90 if (sc > 2) 91 /* back off */ 92 usleep_range(500, 1000); 93 94 if (time_after(jiffies, end)) 95 return 0; 96 97 if (have_drawable_releases && sc > 300) { 98 DMA_FENCE_WARN(fence, "failed to wait on release %llu " 99 "after spincount %d\n", 100 fence->context & ~0xf0000000, sc); 101 goto signaled; 102 } 103 goto retry; 104 } 105 /* 106 * yeah, original sync_obj_wait gave up after 3 spins when 107 * have_drawable_releases is not set. 108 */ 109 110 signaled: 111 cur = jiffies; 112 if (time_after(cur, end)) 113 return 0; 114 return end - cur; 115 } 116 117 static const struct dma_fence_ops qxl_fence_ops = { 118 .get_driver_name = qxl_get_driver_name, 119 .get_timeline_name = qxl_get_timeline_name, 120 .wait = qxl_fence_wait, 121 }; 122 123 static int 124 qxl_release_alloc(struct qxl_device *qdev, int type, 125 struct qxl_release **ret) 126 { 127 struct qxl_release *release; 128 int handle; 129 size_t size = sizeof(*release); 130 131 release = kmalloc(size, GFP_KERNEL); 132 if (!release) { 133 DRM_ERROR("Out of memory\n"); 134 return -ENOMEM; 135 } 136 release->base.ops = NULL; 137 release->type = type; 138 release->release_offset = 0; 139 release->surface_release_id = 0; 140 INIT_LIST_HEAD(&release->bos); 141 142 idr_preload(GFP_KERNEL); 143 spin_lock(&qdev->release_idr_lock); 144 handle = idr_alloc(&qdev->release_idr, release, 1, 0, GFP_NOWAIT); 145 release->base.seqno = ++qdev->release_seqno; 146 spin_unlock(&qdev->release_idr_lock); 147 idr_preload_end(); 148 if (handle < 0) { 149 kfree(release); 150 *ret = NULL; 151 return handle; 152 } 153 *ret = release; 154 DRM_DEBUG_DRIVER("allocated release %d\n", handle); 155 release->id = handle; 156 return handle; 157 } 158 159 static void 160 qxl_release_free_list(struct qxl_release *release) 161 { 162 while (!list_empty(&release->bos)) { 163 struct qxl_bo_list *entry; 164 struct qxl_bo *bo; 165 166 entry = container_of(release->bos.next, 167 struct qxl_bo_list, tv.head); 168 bo = to_qxl_bo(entry->tv.bo); 169 qxl_bo_unref(&bo); 170 list_del(&entry->tv.head); 171 kfree(entry); 172 } 173 release->release_bo = NULL; 174 } 175 176 void 177 qxl_release_free(struct qxl_device *qdev, 178 struct qxl_release *release) 179 { 180 DRM_DEBUG_DRIVER("release %d, type %d\n", release->id, release->type); 181 182 if (release->surface_release_id) 183 qxl_surface_id_dealloc(qdev, release->surface_release_id); 184 185 spin_lock(&qdev->release_idr_lock); 186 idr_remove(&qdev->release_idr, release->id); 187 spin_unlock(&qdev->release_idr_lock); 188 189 if (release->base.ops) { 190 WARN_ON(list_empty(&release->bos)); 191 qxl_release_free_list(release); 192 193 dma_fence_signal(&release->base); 194 dma_fence_put(&release->base); 195 } else { 196 qxl_release_free_list(release); 197 kfree(release); 198 } 199 } 200 201 static int qxl_release_bo_alloc(struct qxl_device *qdev, 202 struct qxl_bo **bo) 203 { 204 /* pin releases bo's they are too messy to evict */ 205 return qxl_bo_create(qdev, PAGE_SIZE, false, true, 206 QXL_GEM_DOMAIN_VRAM, NULL, bo); 207 } 208 209 int qxl_release_list_add(struct qxl_release *release, struct qxl_bo *bo) 210 { 211 struct qxl_bo_list *entry; 212 213 list_for_each_entry(entry, &release->bos, tv.head) { 214 if (entry->tv.bo == &bo->tbo) 215 return 0; 216 } 217 218 entry = kmalloc(sizeof(struct qxl_bo_list), GFP_KERNEL); 219 if (!entry) 220 return -ENOMEM; 221 222 qxl_bo_ref(bo); 223 entry->tv.bo = &bo->tbo; 224 entry->tv.num_shared = 0; 225 list_add_tail(&entry->tv.head, &release->bos); 226 return 0; 227 } 228 229 static int qxl_release_validate_bo(struct qxl_bo *bo) 230 { 231 struct ttm_operation_ctx ctx = { true, false }; 232 int ret; 233 234 if (!bo->pin_count) { 235 qxl_ttm_placement_from_domain(bo, bo->type, false); 236 ret = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); 237 if (ret) 238 return ret; 239 } 240 241 ret = dma_resv_reserve_shared(bo->tbo.base.resv, 1); 242 if (ret) 243 return ret; 244 245 /* allocate a surface for reserved + validated buffers */ 246 ret = qxl_bo_check_id(to_qxl(bo->tbo.base.dev), bo); 247 if (ret) 248 return ret; 249 return 0; 250 } 251 252 int qxl_release_reserve_list(struct qxl_release *release, bool no_intr) 253 { 254 int ret; 255 struct qxl_bo_list *entry; 256 257 /* if only one object on the release its the release itself 258 since these objects are pinned no need to reserve */ 259 if (list_is_singular(&release->bos)) 260 return 0; 261 262 ret = ttm_eu_reserve_buffers(&release->ticket, &release->bos, 263 !no_intr, NULL); 264 if (ret) 265 return ret; 266 267 list_for_each_entry(entry, &release->bos, tv.head) { 268 struct qxl_bo *bo = to_qxl_bo(entry->tv.bo); 269 270 ret = qxl_release_validate_bo(bo); 271 if (ret) { 272 ttm_eu_backoff_reservation(&release->ticket, &release->bos); 273 return ret; 274 } 275 } 276 return 0; 277 } 278 279 void qxl_release_backoff_reserve_list(struct qxl_release *release) 280 { 281 /* if only one object on the release its the release itself 282 since these objects are pinned no need to reserve */ 283 if (list_is_singular(&release->bos)) 284 return; 285 286 ttm_eu_backoff_reservation(&release->ticket, &release->bos); 287 } 288 289 int qxl_alloc_surface_release_reserved(struct qxl_device *qdev, 290 enum qxl_surface_cmd_type surface_cmd_type, 291 struct qxl_release *create_rel, 292 struct qxl_release **release) 293 { 294 if (surface_cmd_type == QXL_SURFACE_CMD_DESTROY && create_rel) { 295 int idr_ret; 296 struct qxl_bo *bo; 297 union qxl_release_info *info; 298 299 /* stash the release after the create command */ 300 idr_ret = qxl_release_alloc(qdev, QXL_RELEASE_SURFACE_CMD, release); 301 if (idr_ret < 0) 302 return idr_ret; 303 bo = create_rel->release_bo; 304 305 (*release)->release_bo = bo; 306 (*release)->release_offset = create_rel->release_offset + 64; 307 308 qxl_release_list_add(*release, bo); 309 310 info = qxl_release_map(qdev, *release); 311 info->id = idr_ret; 312 qxl_release_unmap(qdev, *release, info); 313 return 0; 314 } 315 316 return qxl_alloc_release_reserved(qdev, sizeof(struct qxl_surface_cmd), 317 QXL_RELEASE_SURFACE_CMD, release, NULL); 318 } 319 320 int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size, 321 int type, struct qxl_release **release, 322 struct qxl_bo **rbo) 323 { 324 struct qxl_bo *bo; 325 int idr_ret; 326 int ret = 0; 327 union qxl_release_info *info; 328 int cur_idx; 329 330 if (type == QXL_RELEASE_DRAWABLE) 331 cur_idx = 0; 332 else if (type == QXL_RELEASE_SURFACE_CMD) 333 cur_idx = 1; 334 else if (type == QXL_RELEASE_CURSOR_CMD) 335 cur_idx = 2; 336 else { 337 DRM_ERROR("got illegal type: %d\n", type); 338 return -EINVAL; 339 } 340 341 idr_ret = qxl_release_alloc(qdev, type, release); 342 if (idr_ret < 0) { 343 if (rbo) 344 *rbo = NULL; 345 return idr_ret; 346 } 347 348 mutex_lock(&qdev->release_mutex); 349 if (qdev->current_release_bo_offset[cur_idx] + 1 >= releases_per_bo[cur_idx]) { 350 qxl_bo_unref(&qdev->current_release_bo[cur_idx]); 351 qdev->current_release_bo_offset[cur_idx] = 0; 352 qdev->current_release_bo[cur_idx] = NULL; 353 } 354 if (!qdev->current_release_bo[cur_idx]) { 355 ret = qxl_release_bo_alloc(qdev, &qdev->current_release_bo[cur_idx]); 356 if (ret) { 357 mutex_unlock(&qdev->release_mutex); 358 qxl_release_free(qdev, *release); 359 return ret; 360 } 361 } 362 363 bo = qxl_bo_ref(qdev->current_release_bo[cur_idx]); 364 365 (*release)->release_bo = bo; 366 (*release)->release_offset = qdev->current_release_bo_offset[cur_idx] * release_size_per_bo[cur_idx]; 367 qdev->current_release_bo_offset[cur_idx]++; 368 369 if (rbo) 370 *rbo = bo; 371 372 mutex_unlock(&qdev->release_mutex); 373 374 ret = qxl_release_list_add(*release, bo); 375 qxl_bo_unref(&bo); 376 if (ret) { 377 qxl_release_free(qdev, *release); 378 return ret; 379 } 380 381 info = qxl_release_map(qdev, *release); 382 info->id = idr_ret; 383 qxl_release_unmap(qdev, *release, info); 384 385 return ret; 386 } 387 388 struct qxl_release *qxl_release_from_id_locked(struct qxl_device *qdev, 389 uint64_t id) 390 { 391 struct qxl_release *release; 392 393 spin_lock(&qdev->release_idr_lock); 394 release = idr_find(&qdev->release_idr, id); 395 spin_unlock(&qdev->release_idr_lock); 396 if (!release) { 397 DRM_ERROR("failed to find id in release_idr\n"); 398 return NULL; 399 } 400 401 return release; 402 } 403 404 union qxl_release_info *qxl_release_map(struct qxl_device *qdev, 405 struct qxl_release *release) 406 { 407 void *ptr; 408 union qxl_release_info *info; 409 struct qxl_bo *bo = release->release_bo; 410 411 ptr = qxl_bo_kmap_atomic_page(qdev, bo, release->release_offset & PAGE_MASK); 412 if (!ptr) 413 return NULL; 414 info = ptr + (release->release_offset & ~PAGE_MASK); 415 return info; 416 } 417 418 void qxl_release_unmap(struct qxl_device *qdev, 419 struct qxl_release *release, 420 union qxl_release_info *info) 421 { 422 struct qxl_bo *bo = release->release_bo; 423 void *ptr; 424 425 ptr = ((void *)info) - (release->release_offset & ~PAGE_MASK); 426 qxl_bo_kunmap_atomic_page(qdev, bo, ptr); 427 } 428 429 void qxl_release_fence_buffer_objects(struct qxl_release *release) 430 { 431 struct ttm_buffer_object *bo; 432 struct ttm_bo_device *bdev; 433 struct ttm_validate_buffer *entry; 434 struct qxl_device *qdev; 435 436 /* if only one object on the release its the release itself 437 since these objects are pinned no need to reserve */ 438 if (list_is_singular(&release->bos) || list_empty(&release->bos)) 439 return; 440 441 bo = list_first_entry(&release->bos, struct ttm_validate_buffer, head)->bo; 442 bdev = bo->bdev; 443 qdev = container_of(bdev, struct qxl_device, mman.bdev); 444 445 /* 446 * Since we never really allocated a context and we don't want to conflict, 447 * set the highest bits. This will break if we really allow exporting of dma-bufs. 448 */ 449 dma_fence_init(&release->base, &qxl_fence_ops, &qdev->release_lock, 450 release->id | 0xf0000000, release->base.seqno); 451 trace_dma_fence_emit(&release->base); 452 453 spin_lock(&ttm_bo_glob.lru_lock); 454 455 list_for_each_entry(entry, &release->bos, head) { 456 bo = entry->bo; 457 458 dma_resv_add_shared_fence(bo->base.resv, &release->base); 459 ttm_bo_move_to_lru_tail(bo, NULL); 460 dma_resv_unlock(bo->base.resv); 461 } 462 spin_unlock(&ttm_bo_glob.lru_lock); 463 ww_acquire_fini(&release->ticket); 464 } 465 466