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 (PAGE_SIZE / 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 (PAGE_SIZE / SURFACE_RELEASE_SIZE) 43 44static const int release_size_per_bo[] = { RELEASE_SIZE, SURFACE_RELEASE_SIZE, RELEASE_SIZE }; 45static const int releases_per_bo[] = { RELEASES_PER_BO, SURFACE_RELEASES_PER_BO, RELEASES_PER_BO }; 46 47static const char *qxl_get_driver_name(struct dma_fence *fence) 48{ 49 return "qxl"; 50} 51 52static const char *qxl_get_timeline_name(struct dma_fence *fence) 53{ 54 return "release"; 55} 56 57static 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 70retry: 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, 99 "failed to wait on release %llu 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 110signaled: 111 cur = jiffies; 112 if (time_after(cur, end)) 113 return 0; 114 return end - cur; 115} 116 117static 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 123static int 124qxl_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 159static void 160qxl_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 176void 177qxl_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 atomic_dec(&qdev->release_count); 200} 201 202static int qxl_release_bo_alloc(struct qxl_device *qdev, 203 struct qxl_bo **bo, 204 u32 priority) 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, priority, NULL, bo); 209} 210 211int 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.num_shared = 0; 227 list_add_tail(&entry->tv.head, &release->bos); 228 return 0; 229} 230 231static 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->tbo.pin_count) { 237 qxl_ttm_placement_from_domain(bo, bo->type); 238 ret = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); 239 if (ret) 240 return ret; 241 } 242 243 ret = dma_resv_reserve_fences(bo->tbo.base.resv, 1); 244 if (ret) 245 return ret; 246 247 /* allocate a surface for reserved + validated buffers */ 248 ret = qxl_bo_check_id(to_qxl(bo->tbo.base.dev), bo); 249 if (ret) 250 return ret; 251 return 0; 252} 253 254int 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 281void 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 291int qxl_alloc_surface_release_reserved(struct qxl_device *qdev, 292 enum qxl_surface_cmd_type surface_cmd_type, 293 struct qxl_release *create_rel, 294 struct qxl_release **release) 295{ 296 if (surface_cmd_type == QXL_SURFACE_CMD_DESTROY && create_rel) { 297 int idr_ret; 298 struct qxl_bo *bo; 299 union qxl_release_info *info; 300 301 /* stash the release after the create command */ 302 idr_ret = qxl_release_alloc(qdev, QXL_RELEASE_SURFACE_CMD, release); 303 if (idr_ret < 0) 304 return idr_ret; 305 bo = create_rel->release_bo; 306 307 (*release)->release_bo = bo; 308 (*release)->release_offset = create_rel->release_offset + 64; 309 310 qxl_release_list_add(*release, bo); 311 312 info = qxl_release_map(qdev, *release); 313 info->id = idr_ret; 314 qxl_release_unmap(qdev, *release, info); 315 return 0; 316 } 317 318 return qxl_alloc_release_reserved(qdev, sizeof(struct qxl_surface_cmd), 319 QXL_RELEASE_SURFACE_CMD, release, NULL); 320} 321 322int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size, 323 int type, struct qxl_release **release, 324 struct qxl_bo **rbo) 325{ 326 struct qxl_bo *bo, *free_bo = NULL; 327 int idr_ret; 328 int ret = 0; 329 union qxl_release_info *info; 330 int cur_idx; 331 u32 priority; 332 333 if (type == QXL_RELEASE_DRAWABLE) { 334 cur_idx = 0; 335 priority = 0; 336 } else if (type == QXL_RELEASE_SURFACE_CMD) { 337 cur_idx = 1; 338 priority = 1; 339 } else if (type == QXL_RELEASE_CURSOR_CMD) { 340 cur_idx = 2; 341 priority = 1; 342 } 343 else { 344 DRM_ERROR("got illegal type: %d\n", type); 345 return -EINVAL; 346 } 347 348 idr_ret = qxl_release_alloc(qdev, type, release); 349 if (idr_ret < 0) { 350 if (rbo) 351 *rbo = NULL; 352 return idr_ret; 353 } 354 atomic_inc(&qdev->release_count); 355 356 mutex_lock(&qdev->release_mutex); 357 if (qdev->current_release_bo_offset[cur_idx] + 1 >= releases_per_bo[cur_idx]) { 358 free_bo = qdev->current_release_bo[cur_idx]; 359 qdev->current_release_bo_offset[cur_idx] = 0; 360 qdev->current_release_bo[cur_idx] = NULL; 361 } 362 if (!qdev->current_release_bo[cur_idx]) { 363 ret = qxl_release_bo_alloc(qdev, &qdev->current_release_bo[cur_idx], priority); 364 if (ret) { 365 mutex_unlock(&qdev->release_mutex); 366 if (free_bo) { 367 qxl_bo_unpin(free_bo); 368 qxl_bo_unref(&free_bo); 369 } 370 qxl_release_free(qdev, *release); 371 return ret; 372 } 373 } 374 375 bo = qxl_bo_ref(qdev->current_release_bo[cur_idx]); 376 377 (*release)->release_bo = bo; 378 (*release)->release_offset = qdev->current_release_bo_offset[cur_idx] * release_size_per_bo[cur_idx]; 379 qdev->current_release_bo_offset[cur_idx]++; 380 381 if (rbo) 382 *rbo = bo; 383 384 mutex_unlock(&qdev->release_mutex); 385 if (free_bo) { 386 qxl_bo_unpin(free_bo); 387 qxl_bo_unref(&free_bo); 388 } 389 390 ret = qxl_release_list_add(*release, bo); 391 qxl_bo_unref(&bo); 392 if (ret) { 393 qxl_release_free(qdev, *release); 394 return ret; 395 } 396 397 info = qxl_release_map(qdev, *release); 398 info->id = idr_ret; 399 qxl_release_unmap(qdev, *release, info); 400 401 return ret; 402} 403 404struct qxl_release *qxl_release_from_id_locked(struct qxl_device *qdev, 405 uint64_t id) 406{ 407 struct qxl_release *release; 408 409 spin_lock(&qdev->release_idr_lock); 410 release = idr_find(&qdev->release_idr, id); 411 spin_unlock(&qdev->release_idr_lock); 412 if (!release) { 413 DRM_ERROR("failed to find id in release_idr\n"); 414 return NULL; 415 } 416 417 return release; 418} 419 420union qxl_release_info *qxl_release_map(struct qxl_device *qdev, 421 struct qxl_release *release) 422{ 423 void *ptr; 424 union qxl_release_info *info; 425 struct qxl_bo *bo = release->release_bo; 426 427 ptr = qxl_bo_kmap_atomic_page(qdev, bo, release->release_offset & PAGE_MASK); 428 if (!ptr) 429 return NULL; 430 info = ptr + (release->release_offset & ~PAGE_MASK); 431 return info; 432} 433 434void qxl_release_unmap(struct qxl_device *qdev, 435 struct qxl_release *release, 436 union qxl_release_info *info) 437{ 438 struct qxl_bo *bo = release->release_bo; 439 void *ptr; 440 441 ptr = ((void *)info) - (release->release_offset & ~PAGE_MASK); 442 qxl_bo_kunmap_atomic_page(qdev, bo, ptr); 443} 444 445void qxl_release_fence_buffer_objects(struct qxl_release *release) 446{ 447 struct ttm_buffer_object *bo; 448 struct ttm_device *bdev; 449 struct ttm_validate_buffer *entry; 450 struct qxl_device *qdev; 451 452 /* if only one object on the release its the release itself 453 since these objects are pinned no need to reserve */ 454 if (list_is_singular(&release->bos) || list_empty(&release->bos)) 455 return; 456 457 bo = list_first_entry(&release->bos, struct ttm_validate_buffer, head)->bo; 458 bdev = bo->bdev; 459 qdev = container_of(bdev, struct qxl_device, mman.bdev); 460 461 /* 462 * Since we never really allocated a context and we don't want to conflict, 463 * set the highest bits. This will break if we really allow exporting of dma-bufs. 464 */ 465 dma_fence_init(&release->base, &qxl_fence_ops, &qdev->release_lock, 466 release->id | 0xf0000000, release->base.seqno); 467 trace_dma_fence_emit(&release->base); 468 469 list_for_each_entry(entry, &release->bos, head) { 470 bo = entry->bo; 471 472 dma_resv_add_fence(bo->base.resv, &release->base, 473 DMA_RESV_USAGE_READ); 474 ttm_bo_move_to_lru_tail_unlocked(bo); 475 dma_resv_unlock(bo->base.resv); 476 } 477 ww_acquire_fini(&release->ticket); 478} 479 480