1 /* 2 * Copyright 2013 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 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: Dave Airlie 23 * Alon Levy 24 */ 25 26 #include <linux/iosys-map.h> 27 #include <linux/io-mapping.h> 28 29 #include "qxl_drv.h" 30 #include "qxl_object.h" 31 32 static int __qxl_bo_pin(struct qxl_bo *bo); 33 static void __qxl_bo_unpin(struct qxl_bo *bo); 34 35 static void qxl_ttm_bo_destroy(struct ttm_buffer_object *tbo) 36 { 37 struct qxl_bo *bo; 38 struct qxl_device *qdev; 39 40 bo = to_qxl_bo(tbo); 41 qdev = to_qxl(bo->tbo.base.dev); 42 43 qxl_surface_evict(qdev, bo, false); 44 WARN_ON_ONCE(bo->map_count > 0); 45 mutex_lock(&qdev->gem.mutex); 46 list_del_init(&bo->list); 47 mutex_unlock(&qdev->gem.mutex); 48 drm_gem_object_release(&bo->tbo.base); 49 kfree(bo); 50 } 51 52 bool qxl_ttm_bo_is_qxl_bo(struct ttm_buffer_object *bo) 53 { 54 if (bo->destroy == &qxl_ttm_bo_destroy) 55 return true; 56 return false; 57 } 58 59 void qxl_ttm_placement_from_domain(struct qxl_bo *qbo, u32 domain) 60 { 61 u32 c = 0; 62 u32 pflag = 0; 63 unsigned int i; 64 65 if (qbo->tbo.base.size <= PAGE_SIZE) 66 pflag |= TTM_PL_FLAG_TOPDOWN; 67 68 qbo->placement.placement = qbo->placements; 69 qbo->placement.busy_placement = qbo->placements; 70 if (domain == QXL_GEM_DOMAIN_VRAM) { 71 qbo->placements[c].mem_type = TTM_PL_VRAM; 72 qbo->placements[c++].flags = pflag; 73 } 74 if (domain == QXL_GEM_DOMAIN_SURFACE) { 75 qbo->placements[c].mem_type = TTM_PL_PRIV; 76 qbo->placements[c++].flags = pflag; 77 qbo->placements[c].mem_type = TTM_PL_VRAM; 78 qbo->placements[c++].flags = pflag; 79 } 80 if (domain == QXL_GEM_DOMAIN_CPU) { 81 qbo->placements[c].mem_type = TTM_PL_SYSTEM; 82 qbo->placements[c++].flags = pflag; 83 } 84 if (!c) { 85 qbo->placements[c].mem_type = TTM_PL_SYSTEM; 86 qbo->placements[c++].flags = 0; 87 } 88 qbo->placement.num_placement = c; 89 qbo->placement.num_busy_placement = c; 90 for (i = 0; i < c; ++i) { 91 qbo->placements[i].fpfn = 0; 92 qbo->placements[i].lpfn = 0; 93 } 94 } 95 96 static const struct drm_gem_object_funcs qxl_object_funcs = { 97 .free = qxl_gem_object_free, 98 .open = qxl_gem_object_open, 99 .close = qxl_gem_object_close, 100 .pin = qxl_gem_prime_pin, 101 .unpin = qxl_gem_prime_unpin, 102 .get_sg_table = qxl_gem_prime_get_sg_table, 103 .vmap = qxl_gem_prime_vmap, 104 .vunmap = qxl_gem_prime_vunmap, 105 .mmap = drm_gem_ttm_mmap, 106 .print_info = drm_gem_ttm_print_info, 107 }; 108 109 int qxl_bo_create(struct qxl_device *qdev, unsigned long size, 110 bool kernel, bool pinned, u32 domain, u32 priority, 111 struct qxl_surface *surf, 112 struct qxl_bo **bo_ptr) 113 { 114 struct ttm_operation_ctx ctx = { !kernel, false }; 115 struct qxl_bo *bo; 116 enum ttm_bo_type type; 117 int r; 118 119 if (kernel) 120 type = ttm_bo_type_kernel; 121 else 122 type = ttm_bo_type_device; 123 *bo_ptr = NULL; 124 bo = kzalloc(sizeof(struct qxl_bo), GFP_KERNEL); 125 if (bo == NULL) 126 return -ENOMEM; 127 size = roundup(size, PAGE_SIZE); 128 r = drm_gem_object_init(&qdev->ddev, &bo->tbo.base, size); 129 if (unlikely(r)) { 130 kfree(bo); 131 return r; 132 } 133 bo->tbo.base.funcs = &qxl_object_funcs; 134 bo->type = domain; 135 bo->surface_id = 0; 136 INIT_LIST_HEAD(&bo->list); 137 138 if (surf) 139 bo->surf = *surf; 140 141 qxl_ttm_placement_from_domain(bo, domain); 142 143 bo->tbo.priority = priority; 144 r = ttm_bo_init_reserved(&qdev->mman.bdev, &bo->tbo, type, 145 &bo->placement, 0, &ctx, NULL, NULL, 146 &qxl_ttm_bo_destroy); 147 if (unlikely(r != 0)) { 148 if (r != -ERESTARTSYS) 149 dev_err(qdev->ddev.dev, 150 "object_init failed for (%lu, 0x%08X)\n", 151 size, domain); 152 return r; 153 } 154 if (pinned) 155 ttm_bo_pin(&bo->tbo); 156 ttm_bo_unreserve(&bo->tbo); 157 *bo_ptr = bo; 158 return 0; 159 } 160 161 int qxl_bo_vmap_locked(struct qxl_bo *bo, struct iosys_map *map) 162 { 163 int r; 164 165 dma_resv_assert_held(bo->tbo.base.resv); 166 167 if (bo->kptr) { 168 bo->map_count++; 169 goto out; 170 } 171 172 r = __qxl_bo_pin(bo); 173 if (r) 174 return r; 175 176 r = ttm_bo_vmap(&bo->tbo, &bo->map); 177 if (r) { 178 __qxl_bo_unpin(bo); 179 return r; 180 } 181 bo->map_count = 1; 182 183 /* TODO: Remove kptr in favor of map everywhere. */ 184 if (bo->map.is_iomem) 185 bo->kptr = (void *)bo->map.vaddr_iomem; 186 else 187 bo->kptr = bo->map.vaddr; 188 189 out: 190 *map = bo->map; 191 return 0; 192 } 193 194 int qxl_bo_vmap(struct qxl_bo *bo, struct iosys_map *map) 195 { 196 int r; 197 198 r = qxl_bo_reserve(bo); 199 if (r) 200 return r; 201 202 r = qxl_bo_vmap_locked(bo, map); 203 qxl_bo_unreserve(bo); 204 return r; 205 } 206 207 void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev, 208 struct qxl_bo *bo, int page_offset) 209 { 210 unsigned long offset; 211 void *rptr; 212 int ret; 213 struct io_mapping *map; 214 struct iosys_map bo_map; 215 216 if (bo->tbo.resource->mem_type == TTM_PL_VRAM) 217 map = qdev->vram_mapping; 218 else if (bo->tbo.resource->mem_type == TTM_PL_PRIV) 219 map = qdev->surface_mapping; 220 else 221 goto fallback; 222 223 offset = bo->tbo.resource->start << PAGE_SHIFT; 224 return io_mapping_map_atomic_wc(map, offset + page_offset); 225 fallback: 226 if (bo->kptr) { 227 rptr = bo->kptr + (page_offset * PAGE_SIZE); 228 return rptr; 229 } 230 231 ret = qxl_bo_vmap_locked(bo, &bo_map); 232 if (ret) 233 return NULL; 234 rptr = bo_map.vaddr; /* TODO: Use mapping abstraction properly */ 235 236 rptr += page_offset * PAGE_SIZE; 237 return rptr; 238 } 239 240 void qxl_bo_vunmap_locked(struct qxl_bo *bo) 241 { 242 dma_resv_assert_held(bo->tbo.base.resv); 243 244 if (bo->kptr == NULL) 245 return; 246 bo->map_count--; 247 if (bo->map_count > 0) 248 return; 249 bo->kptr = NULL; 250 ttm_bo_vunmap(&bo->tbo, &bo->map); 251 __qxl_bo_unpin(bo); 252 } 253 254 int qxl_bo_vunmap(struct qxl_bo *bo) 255 { 256 int r; 257 258 r = qxl_bo_reserve(bo); 259 if (r) 260 return r; 261 262 qxl_bo_vunmap_locked(bo); 263 qxl_bo_unreserve(bo); 264 return 0; 265 } 266 267 void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev, 268 struct qxl_bo *bo, void *pmap) 269 { 270 if ((bo->tbo.resource->mem_type != TTM_PL_VRAM) && 271 (bo->tbo.resource->mem_type != TTM_PL_PRIV)) 272 goto fallback; 273 274 io_mapping_unmap_atomic(pmap); 275 return; 276 fallback: 277 qxl_bo_vunmap_locked(bo); 278 } 279 280 void qxl_bo_unref(struct qxl_bo **bo) 281 { 282 if ((*bo) == NULL) 283 return; 284 285 drm_gem_object_put(&(*bo)->tbo.base); 286 *bo = NULL; 287 } 288 289 struct qxl_bo *qxl_bo_ref(struct qxl_bo *bo) 290 { 291 drm_gem_object_get(&bo->tbo.base); 292 return bo; 293 } 294 295 static int __qxl_bo_pin(struct qxl_bo *bo) 296 { 297 struct ttm_operation_ctx ctx = { false, false }; 298 struct drm_device *ddev = bo->tbo.base.dev; 299 int r; 300 301 if (bo->tbo.pin_count) { 302 ttm_bo_pin(&bo->tbo); 303 return 0; 304 } 305 qxl_ttm_placement_from_domain(bo, bo->type); 306 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); 307 if (likely(r == 0)) 308 ttm_bo_pin(&bo->tbo); 309 if (unlikely(r != 0)) 310 dev_err(ddev->dev, "%p pin failed\n", bo); 311 return r; 312 } 313 314 static void __qxl_bo_unpin(struct qxl_bo *bo) 315 { 316 ttm_bo_unpin(&bo->tbo); 317 } 318 319 /* 320 * Reserve the BO before pinning the object. If the BO was reserved 321 * beforehand, use the internal version directly __qxl_bo_pin. 322 * 323 */ 324 int qxl_bo_pin(struct qxl_bo *bo) 325 { 326 int r; 327 328 r = qxl_bo_reserve(bo); 329 if (r) 330 return r; 331 332 r = __qxl_bo_pin(bo); 333 qxl_bo_unreserve(bo); 334 return r; 335 } 336 337 /* 338 * Reserve the BO before pinning the object. If the BO was reserved 339 * beforehand, use the internal version directly __qxl_bo_unpin. 340 * 341 */ 342 int qxl_bo_unpin(struct qxl_bo *bo) 343 { 344 int r; 345 346 r = qxl_bo_reserve(bo); 347 if (r) 348 return r; 349 350 __qxl_bo_unpin(bo); 351 qxl_bo_unreserve(bo); 352 return 0; 353 } 354 355 void qxl_bo_force_delete(struct qxl_device *qdev) 356 { 357 struct qxl_bo *bo, *n; 358 359 if (list_empty(&qdev->gem.objects)) 360 return; 361 dev_err(qdev->ddev.dev, "Userspace still has active objects !\n"); 362 list_for_each_entry_safe(bo, n, &qdev->gem.objects, list) { 363 dev_err(qdev->ddev.dev, "%p %p %lu %lu force free\n", 364 &bo->tbo.base, bo, (unsigned long)bo->tbo.base.size, 365 *((unsigned long *)&bo->tbo.base.refcount)); 366 mutex_lock(&qdev->gem.mutex); 367 list_del_init(&bo->list); 368 mutex_unlock(&qdev->gem.mutex); 369 /* this should unref the ttm bo */ 370 drm_gem_object_put(&bo->tbo.base); 371 } 372 } 373 374 int qxl_bo_init(struct qxl_device *qdev) 375 { 376 return qxl_ttm_init(qdev); 377 } 378 379 void qxl_bo_fini(struct qxl_device *qdev) 380 { 381 qxl_ttm_fini(qdev); 382 } 383 384 int qxl_bo_check_id(struct qxl_device *qdev, struct qxl_bo *bo) 385 { 386 int ret; 387 388 if (bo->type == QXL_GEM_DOMAIN_SURFACE && bo->surface_id == 0) { 389 /* allocate a surface id for this surface now */ 390 ret = qxl_surface_id_alloc(qdev, bo); 391 if (ret) 392 return ret; 393 394 ret = qxl_hw_surface_alloc(qdev, bo); 395 if (ret) 396 return ret; 397 } 398 return 0; 399 } 400 401 int qxl_surf_evict(struct qxl_device *qdev) 402 { 403 struct ttm_resource_manager *man; 404 405 man = ttm_manager_type(&qdev->mman.bdev, TTM_PL_PRIV); 406 return ttm_resource_manager_evict_all(&qdev->mman.bdev, man); 407 } 408 409 int qxl_vram_evict(struct qxl_device *qdev) 410 { 411 struct ttm_resource_manager *man; 412 413 man = ttm_manager_type(&qdev->mman.bdev, TTM_PL_VRAM); 414 return ttm_resource_manager_evict_all(&qdev->mman.bdev, man); 415 } 416