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/dma-buf-map.h> 27 #include <linux/io-mapping.h> 28 29 #include "qxl_drv.h" 30 #include "qxl_object.h" 31 32 static void qxl_ttm_bo_destroy(struct ttm_buffer_object *tbo) 33 { 34 struct qxl_bo *bo; 35 struct qxl_device *qdev; 36 37 bo = to_qxl_bo(tbo); 38 qdev = to_qxl(bo->tbo.base.dev); 39 40 qxl_surface_evict(qdev, bo, false); 41 WARN_ON_ONCE(bo->map_count > 0); 42 mutex_lock(&qdev->gem.mutex); 43 list_del_init(&bo->list); 44 mutex_unlock(&qdev->gem.mutex); 45 drm_gem_object_release(&bo->tbo.base); 46 kfree(bo); 47 } 48 49 bool qxl_ttm_bo_is_qxl_bo(struct ttm_buffer_object *bo) 50 { 51 if (bo->destroy == &qxl_ttm_bo_destroy) 52 return true; 53 return false; 54 } 55 56 void qxl_ttm_placement_from_domain(struct qxl_bo *qbo, u32 domain) 57 { 58 u32 c = 0; 59 u32 pflag = 0; 60 unsigned int i; 61 62 if (qbo->tbo.base.size <= PAGE_SIZE) 63 pflag |= TTM_PL_FLAG_TOPDOWN; 64 65 qbo->placement.placement = qbo->placements; 66 qbo->placement.busy_placement = qbo->placements; 67 if (domain == QXL_GEM_DOMAIN_VRAM) { 68 qbo->placements[c].mem_type = TTM_PL_VRAM; 69 qbo->placements[c++].flags = pflag; 70 } 71 if (domain == QXL_GEM_DOMAIN_SURFACE) { 72 qbo->placements[c].mem_type = TTM_PL_PRIV; 73 qbo->placements[c++].flags = pflag; 74 qbo->placements[c].mem_type = TTM_PL_VRAM; 75 qbo->placements[c++].flags = pflag; 76 } 77 if (domain == QXL_GEM_DOMAIN_CPU) { 78 qbo->placements[c].mem_type = TTM_PL_SYSTEM; 79 qbo->placements[c++].flags = pflag; 80 } 81 if (!c) { 82 qbo->placements[c].mem_type = TTM_PL_SYSTEM; 83 qbo->placements[c++].flags = 0; 84 } 85 qbo->placement.num_placement = c; 86 qbo->placement.num_busy_placement = c; 87 for (i = 0; i < c; ++i) { 88 qbo->placements[i].fpfn = 0; 89 qbo->placements[i].lpfn = 0; 90 } 91 } 92 93 static const struct drm_gem_object_funcs qxl_object_funcs = { 94 .free = qxl_gem_object_free, 95 .open = qxl_gem_object_open, 96 .close = qxl_gem_object_close, 97 .pin = qxl_gem_prime_pin, 98 .unpin = qxl_gem_prime_unpin, 99 .get_sg_table = qxl_gem_prime_get_sg_table, 100 .vmap = qxl_gem_prime_vmap, 101 .vunmap = qxl_gem_prime_vunmap, 102 .mmap = drm_gem_ttm_mmap, 103 .print_info = drm_gem_ttm_print_info, 104 }; 105 106 int qxl_bo_create(struct qxl_device *qdev, 107 unsigned long size, bool kernel, bool pinned, u32 domain, 108 struct qxl_surface *surf, 109 struct qxl_bo **bo_ptr) 110 { 111 struct ttm_operation_ctx ctx = { !kernel, false }; 112 struct qxl_bo *bo; 113 enum ttm_bo_type type; 114 int r; 115 116 if (kernel) 117 type = ttm_bo_type_kernel; 118 else 119 type = ttm_bo_type_device; 120 *bo_ptr = NULL; 121 bo = kzalloc(sizeof(struct qxl_bo), GFP_KERNEL); 122 if (bo == NULL) 123 return -ENOMEM; 124 size = roundup(size, PAGE_SIZE); 125 r = drm_gem_object_init(&qdev->ddev, &bo->tbo.base, size); 126 if (unlikely(r)) { 127 kfree(bo); 128 return r; 129 } 130 bo->tbo.base.funcs = &qxl_object_funcs; 131 bo->type = domain; 132 bo->surface_id = 0; 133 INIT_LIST_HEAD(&bo->list); 134 135 if (surf) 136 bo->surf = *surf; 137 138 qxl_ttm_placement_from_domain(bo, domain); 139 140 r = ttm_bo_init_reserved(&qdev->mman.bdev, &bo->tbo, size, type, 141 &bo->placement, 0, &ctx, size, 142 NULL, NULL, &qxl_ttm_bo_destroy); 143 if (unlikely(r != 0)) { 144 if (r != -ERESTARTSYS) 145 dev_err(qdev->ddev.dev, 146 "object_init failed for (%lu, 0x%08X)\n", 147 size, domain); 148 return r; 149 } 150 if (pinned) 151 ttm_bo_pin(&bo->tbo); 152 ttm_bo_unreserve(&bo->tbo); 153 *bo_ptr = bo; 154 return 0; 155 } 156 157 int qxl_bo_kmap(struct qxl_bo *bo, struct dma_buf_map *map) 158 { 159 int r; 160 161 if (bo->kptr) { 162 bo->map_count++; 163 goto out; 164 } 165 r = ttm_bo_vmap(&bo->tbo, &bo->map); 166 if (r) 167 return r; 168 bo->map_count = 1; 169 170 /* TODO: Remove kptr in favor of map everywhere. */ 171 if (bo->map.is_iomem) 172 bo->kptr = (void *)bo->map.vaddr_iomem; 173 else 174 bo->kptr = bo->map.vaddr; 175 176 out: 177 *map = bo->map; 178 return 0; 179 } 180 181 void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev, 182 struct qxl_bo *bo, int page_offset) 183 { 184 unsigned long offset; 185 void *rptr; 186 int ret; 187 struct io_mapping *map; 188 struct dma_buf_map bo_map; 189 190 if (bo->tbo.mem.mem_type == TTM_PL_VRAM) 191 map = qdev->vram_mapping; 192 else if (bo->tbo.mem.mem_type == TTM_PL_PRIV) 193 map = qdev->surface_mapping; 194 else 195 goto fallback; 196 197 offset = bo->tbo.mem.start << PAGE_SHIFT; 198 return io_mapping_map_atomic_wc(map, offset + page_offset); 199 fallback: 200 if (bo->kptr) { 201 rptr = bo->kptr + (page_offset * PAGE_SIZE); 202 return rptr; 203 } 204 205 ret = qxl_bo_kmap(bo, &bo_map); 206 if (ret) 207 return NULL; 208 rptr = bo_map.vaddr; /* TODO: Use mapping abstraction properly */ 209 210 rptr += page_offset * PAGE_SIZE; 211 return rptr; 212 } 213 214 void qxl_bo_kunmap(struct qxl_bo *bo) 215 { 216 if (bo->kptr == NULL) 217 return; 218 bo->map_count--; 219 if (bo->map_count > 0) 220 return; 221 bo->kptr = NULL; 222 ttm_bo_vunmap(&bo->tbo, &bo->map); 223 } 224 225 void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev, 226 struct qxl_bo *bo, void *pmap) 227 { 228 if ((bo->tbo.mem.mem_type != TTM_PL_VRAM) && 229 (bo->tbo.mem.mem_type != TTM_PL_PRIV)) 230 goto fallback; 231 232 io_mapping_unmap_atomic(pmap); 233 return; 234 fallback: 235 qxl_bo_kunmap(bo); 236 } 237 238 void qxl_bo_unref(struct qxl_bo **bo) 239 { 240 if ((*bo) == NULL) 241 return; 242 243 drm_gem_object_put(&(*bo)->tbo.base); 244 *bo = NULL; 245 } 246 247 struct qxl_bo *qxl_bo_ref(struct qxl_bo *bo) 248 { 249 drm_gem_object_get(&bo->tbo.base); 250 return bo; 251 } 252 253 static int __qxl_bo_pin(struct qxl_bo *bo) 254 { 255 struct ttm_operation_ctx ctx = { false, false }; 256 struct drm_device *ddev = bo->tbo.base.dev; 257 int r; 258 259 if (bo->tbo.pin_count) { 260 ttm_bo_pin(&bo->tbo); 261 return 0; 262 } 263 qxl_ttm_placement_from_domain(bo, bo->type); 264 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); 265 if (likely(r == 0)) 266 ttm_bo_pin(&bo->tbo); 267 if (unlikely(r != 0)) 268 dev_err(ddev->dev, "%p pin failed\n", bo); 269 return r; 270 } 271 272 static void __qxl_bo_unpin(struct qxl_bo *bo) 273 { 274 ttm_bo_unpin(&bo->tbo); 275 } 276 277 /* 278 * Reserve the BO before pinning the object. If the BO was reserved 279 * beforehand, use the internal version directly __qxl_bo_pin. 280 * 281 */ 282 int qxl_bo_pin(struct qxl_bo *bo) 283 { 284 int r; 285 286 r = qxl_bo_reserve(bo); 287 if (r) 288 return r; 289 290 r = __qxl_bo_pin(bo); 291 qxl_bo_unreserve(bo); 292 return r; 293 } 294 295 /* 296 * Reserve the BO before pinning the object. If the BO was reserved 297 * beforehand, use the internal version directly __qxl_bo_unpin. 298 * 299 */ 300 int qxl_bo_unpin(struct qxl_bo *bo) 301 { 302 int r; 303 304 r = qxl_bo_reserve(bo); 305 if (r) 306 return r; 307 308 __qxl_bo_unpin(bo); 309 qxl_bo_unreserve(bo); 310 return 0; 311 } 312 313 void qxl_bo_force_delete(struct qxl_device *qdev) 314 { 315 struct qxl_bo *bo, *n; 316 317 if (list_empty(&qdev->gem.objects)) 318 return; 319 dev_err(qdev->ddev.dev, "Userspace still has active objects !\n"); 320 list_for_each_entry_safe(bo, n, &qdev->gem.objects, list) { 321 dev_err(qdev->ddev.dev, "%p %p %lu %lu force free\n", 322 &bo->tbo.base, bo, (unsigned long)bo->tbo.base.size, 323 *((unsigned long *)&bo->tbo.base.refcount)); 324 mutex_lock(&qdev->gem.mutex); 325 list_del_init(&bo->list); 326 mutex_unlock(&qdev->gem.mutex); 327 /* this should unref the ttm bo */ 328 drm_gem_object_put(&bo->tbo.base); 329 } 330 } 331 332 int qxl_bo_init(struct qxl_device *qdev) 333 { 334 return qxl_ttm_init(qdev); 335 } 336 337 void qxl_bo_fini(struct qxl_device *qdev) 338 { 339 qxl_ttm_fini(qdev); 340 } 341 342 int qxl_bo_check_id(struct qxl_device *qdev, struct qxl_bo *bo) 343 { 344 int ret; 345 346 if (bo->type == QXL_GEM_DOMAIN_SURFACE && bo->surface_id == 0) { 347 /* allocate a surface id for this surface now */ 348 ret = qxl_surface_id_alloc(qdev, bo); 349 if (ret) 350 return ret; 351 352 ret = qxl_hw_surface_alloc(qdev, bo); 353 if (ret) 354 return ret; 355 } 356 return 0; 357 } 358 359 int qxl_surf_evict(struct qxl_device *qdev) 360 { 361 struct ttm_resource_manager *man; 362 363 man = ttm_manager_type(&qdev->mman.bdev, TTM_PL_PRIV); 364 return ttm_resource_manager_evict_all(&qdev->mman.bdev, man); 365 } 366 367 int qxl_vram_evict(struct qxl_device *qdev) 368 { 369 struct ttm_resource_manager *man; 370 371 man = ttm_manager_type(&qdev->mman.bdev, TTM_PL_VRAM); 372 return ttm_resource_manager_evict_all(&qdev->mman.bdev, man); 373 } 374