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 "qxl_drv.h" 27 #include "qxl_object.h" 28 29 #include <linux/io-mapping.h> 30 static void qxl_ttm_bo_destroy(struct ttm_buffer_object *tbo) 31 { 32 struct qxl_bo *bo; 33 struct qxl_device *qdev; 34 35 bo = to_qxl_bo(tbo); 36 qdev = to_qxl(bo->tbo.base.dev); 37 38 qxl_surface_evict(qdev, bo, false); 39 WARN_ON_ONCE(bo->map_count > 0); 40 mutex_lock(&qdev->gem.mutex); 41 list_del_init(&bo->list); 42 mutex_unlock(&qdev->gem.mutex); 43 drm_gem_object_release(&bo->tbo.base); 44 kfree(bo); 45 } 46 47 bool qxl_ttm_bo_is_qxl_bo(struct ttm_buffer_object *bo) 48 { 49 if (bo->destroy == &qxl_ttm_bo_destroy) 50 return true; 51 return false; 52 } 53 54 void qxl_ttm_placement_from_domain(struct qxl_bo *qbo, u32 domain, bool pinned) 55 { 56 u32 c = 0; 57 u32 pflag = 0; 58 unsigned int i; 59 60 if (pinned) 61 pflag |= TTM_PL_FLAG_NO_EVICT; 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 = TTM_PL_FLAG_CACHED | pflag; 70 } 71 if (domain == QXL_GEM_DOMAIN_SURFACE) { 72 qbo->placements[c].mem_type = TTM_PL_PRIV; 73 qbo->placements[c++].flags = TTM_PL_FLAG_CACHED | pflag; 74 qbo->placements[c].mem_type = TTM_PL_VRAM; 75 qbo->placements[c++].flags = TTM_PL_FLAG_CACHED | pflag; 76 } 77 if (domain == QXL_GEM_DOMAIN_CPU) { 78 qbo->placements[c].mem_type = TTM_PL_SYSTEM; 79 qbo->placements[c++].flags = TTM_PL_MASK_CACHING | pflag; 80 } 81 if (!c) { 82 qbo->placements[c].mem_type = TTM_PL_SYSTEM; 83 qbo->placements[c++].flags = TTM_PL_MASK_CACHING; 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 qxl_bo *bo; 112 enum ttm_bo_type type; 113 int r; 114 115 if (kernel) 116 type = ttm_bo_type_kernel; 117 else 118 type = ttm_bo_type_device; 119 *bo_ptr = NULL; 120 bo = kzalloc(sizeof(struct qxl_bo), GFP_KERNEL); 121 if (bo == NULL) 122 return -ENOMEM; 123 size = roundup(size, PAGE_SIZE); 124 r = drm_gem_object_init(&qdev->ddev, &bo->tbo.base, size); 125 if (unlikely(r)) { 126 kfree(bo); 127 return r; 128 } 129 bo->tbo.base.funcs = &qxl_object_funcs; 130 bo->type = domain; 131 bo->pin_count = pinned ? 1 : 0; 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, pinned); 139 140 r = ttm_bo_init(&qdev->mman.bdev, &bo->tbo, size, type, 141 &bo->placement, 0, !kernel, 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 *bo_ptr = bo; 151 return 0; 152 } 153 154 int qxl_bo_kmap(struct qxl_bo *bo, void **ptr) 155 { 156 bool is_iomem; 157 int r; 158 159 if (bo->kptr) { 160 if (ptr) 161 *ptr = bo->kptr; 162 bo->map_count++; 163 return 0; 164 } 165 r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap); 166 if (r) 167 return r; 168 bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem); 169 if (ptr) 170 *ptr = bo->kptr; 171 bo->map_count = 1; 172 return 0; 173 } 174 175 void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev, 176 struct qxl_bo *bo, int page_offset) 177 { 178 unsigned long offset; 179 void *rptr; 180 int ret; 181 struct io_mapping *map; 182 183 if (bo->tbo.mem.mem_type == TTM_PL_VRAM) 184 map = qdev->vram_mapping; 185 else if (bo->tbo.mem.mem_type == TTM_PL_PRIV) 186 map = qdev->surface_mapping; 187 else 188 goto fallback; 189 190 offset = bo->tbo.mem.start << PAGE_SHIFT; 191 return io_mapping_map_atomic_wc(map, offset + page_offset); 192 fallback: 193 if (bo->kptr) { 194 rptr = bo->kptr + (page_offset * PAGE_SIZE); 195 return rptr; 196 } 197 198 ret = qxl_bo_kmap(bo, &rptr); 199 if (ret) 200 return NULL; 201 202 rptr += page_offset * PAGE_SIZE; 203 return rptr; 204 } 205 206 void qxl_bo_kunmap(struct qxl_bo *bo) 207 { 208 if (bo->kptr == NULL) 209 return; 210 bo->map_count--; 211 if (bo->map_count > 0) 212 return; 213 bo->kptr = NULL; 214 ttm_bo_kunmap(&bo->kmap); 215 } 216 217 void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev, 218 struct qxl_bo *bo, void *pmap) 219 { 220 if ((bo->tbo.mem.mem_type != TTM_PL_VRAM) && 221 (bo->tbo.mem.mem_type != TTM_PL_PRIV)) 222 goto fallback; 223 224 io_mapping_unmap_atomic(pmap); 225 return; 226 fallback: 227 qxl_bo_kunmap(bo); 228 } 229 230 void qxl_bo_unref(struct qxl_bo **bo) 231 { 232 if ((*bo) == NULL) 233 return; 234 235 drm_gem_object_put(&(*bo)->tbo.base); 236 *bo = NULL; 237 } 238 239 struct qxl_bo *qxl_bo_ref(struct qxl_bo *bo) 240 { 241 drm_gem_object_get(&bo->tbo.base); 242 return bo; 243 } 244 245 static int __qxl_bo_pin(struct qxl_bo *bo) 246 { 247 struct ttm_operation_ctx ctx = { false, false }; 248 struct drm_device *ddev = bo->tbo.base.dev; 249 int r; 250 251 if (bo->pin_count) { 252 bo->pin_count++; 253 return 0; 254 } 255 qxl_ttm_placement_from_domain(bo, bo->type, true); 256 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); 257 if (likely(r == 0)) { 258 bo->pin_count = 1; 259 } 260 if (unlikely(r != 0)) 261 dev_err(ddev->dev, "%p pin failed\n", bo); 262 return r; 263 } 264 265 static int __qxl_bo_unpin(struct qxl_bo *bo) 266 { 267 struct ttm_operation_ctx ctx = { false, false }; 268 struct drm_device *ddev = bo->tbo.base.dev; 269 int r, i; 270 271 if (!bo->pin_count) { 272 dev_warn(ddev->dev, "%p unpin not necessary\n", bo); 273 return 0; 274 } 275 bo->pin_count--; 276 if (bo->pin_count) 277 return 0; 278 for (i = 0; i < bo->placement.num_placement; i++) 279 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT; 280 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); 281 if (unlikely(r != 0)) 282 dev_err(ddev->dev, "%p validate failed for unpin\n", bo); 283 return r; 284 } 285 286 /* 287 * Reserve the BO before pinning the object. If the BO was reserved 288 * beforehand, use the internal version directly __qxl_bo_pin. 289 * 290 */ 291 int qxl_bo_pin(struct qxl_bo *bo) 292 { 293 int r; 294 295 r = qxl_bo_reserve(bo); 296 if (r) 297 return r; 298 299 r = __qxl_bo_pin(bo); 300 qxl_bo_unreserve(bo); 301 return r; 302 } 303 304 /* 305 * Reserve the BO before pinning the object. If the BO was reserved 306 * beforehand, use the internal version directly __qxl_bo_unpin. 307 * 308 */ 309 int qxl_bo_unpin(struct qxl_bo *bo) 310 { 311 int r; 312 313 r = qxl_bo_reserve(bo); 314 if (r) 315 return r; 316 317 r = __qxl_bo_unpin(bo); 318 qxl_bo_unreserve(bo); 319 return r; 320 } 321 322 void qxl_bo_force_delete(struct qxl_device *qdev) 323 { 324 struct qxl_bo *bo, *n; 325 326 if (list_empty(&qdev->gem.objects)) 327 return; 328 dev_err(qdev->ddev.dev, "Userspace still has active objects !\n"); 329 list_for_each_entry_safe(bo, n, &qdev->gem.objects, list) { 330 dev_err(qdev->ddev.dev, "%p %p %lu %lu force free\n", 331 &bo->tbo.base, bo, (unsigned long)bo->tbo.base.size, 332 *((unsigned long *)&bo->tbo.base.refcount)); 333 mutex_lock(&qdev->gem.mutex); 334 list_del_init(&bo->list); 335 mutex_unlock(&qdev->gem.mutex); 336 /* this should unref the ttm bo */ 337 drm_gem_object_put(&bo->tbo.base); 338 } 339 } 340 341 int qxl_bo_init(struct qxl_device *qdev) 342 { 343 return qxl_ttm_init(qdev); 344 } 345 346 void qxl_bo_fini(struct qxl_device *qdev) 347 { 348 qxl_ttm_fini(qdev); 349 } 350 351 int qxl_bo_check_id(struct qxl_device *qdev, struct qxl_bo *bo) 352 { 353 int ret; 354 355 if (bo->type == QXL_GEM_DOMAIN_SURFACE && bo->surface_id == 0) { 356 /* allocate a surface id for this surface now */ 357 ret = qxl_surface_id_alloc(qdev, bo); 358 if (ret) 359 return ret; 360 361 ret = qxl_hw_surface_alloc(qdev, bo); 362 if (ret) 363 return ret; 364 } 365 return 0; 366 } 367 368 int qxl_surf_evict(struct qxl_device *qdev) 369 { 370 return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_PRIV); 371 } 372 373 int qxl_vram_evict(struct qxl_device *qdev) 374 { 375 return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_VRAM); 376 } 377