1 /* $NetBSD: qxl_object.c,v 1.2 2018/08/27 04:58:35 riastradh Exp $ */ 2 3 /* 4 * Copyright 2013 Red Hat Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: Dave Airlie 25 * Alon Levy 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: qxl_object.c,v 1.2 2018/08/27 04:58:35 riastradh Exp $"); 30 31 #include "qxl_drv.h" 32 #include "qxl_object.h" 33 34 #include <linux/io-mapping.h> 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 = container_of(tbo, struct qxl_bo, tbo); 41 qdev = (struct qxl_device *)bo->gem_base.dev->dev_private; 42 43 qxl_surface_evict(qdev, bo, false); 44 mutex_lock(&qdev->gem.mutex); 45 list_del_init(&bo->list); 46 mutex_unlock(&qdev->gem.mutex); 47 drm_gem_object_release(&bo->gem_base); 48 kfree(bo); 49 } 50 51 bool qxl_ttm_bo_is_qxl_bo(struct ttm_buffer_object *bo) 52 { 53 if (bo->destroy == &qxl_ttm_bo_destroy) 54 return true; 55 return false; 56 } 57 58 void qxl_ttm_placement_from_domain(struct qxl_bo *qbo, u32 domain, bool pinned) 59 { 60 u32 c = 0; 61 u32 pflag = pinned ? TTM_PL_FLAG_NO_EVICT : 0; 62 unsigned i; 63 64 qbo->placement.placement = qbo->placements; 65 qbo->placement.busy_placement = qbo->placements; 66 if (domain == QXL_GEM_DOMAIN_VRAM) 67 qbo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_VRAM | pflag; 68 if (domain == QXL_GEM_DOMAIN_SURFACE) 69 qbo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_PRIV0 | pflag; 70 if (domain == QXL_GEM_DOMAIN_CPU) 71 qbo->placements[c++].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM | pflag; 72 if (!c) 73 qbo->placements[c++].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM; 74 qbo->placement.num_placement = c; 75 qbo->placement.num_busy_placement = c; 76 for (i = 0; i < c; ++i) { 77 qbo->placements[i].fpfn = 0; 78 qbo->placements[i].lpfn = 0; 79 } 80 } 81 82 83 int qxl_bo_create(struct qxl_device *qdev, 84 unsigned long size, bool kernel, bool pinned, u32 domain, 85 struct qxl_surface *surf, 86 struct qxl_bo **bo_ptr) 87 { 88 struct qxl_bo *bo; 89 enum ttm_bo_type type; 90 int r; 91 92 if (kernel) 93 type = ttm_bo_type_kernel; 94 else 95 type = ttm_bo_type_device; 96 *bo_ptr = NULL; 97 bo = kzalloc(sizeof(struct qxl_bo), GFP_KERNEL); 98 if (bo == NULL) 99 return -ENOMEM; 100 size = roundup(size, PAGE_SIZE); 101 r = drm_gem_object_init(qdev->ddev, &bo->gem_base, size); 102 if (unlikely(r)) { 103 kfree(bo); 104 return r; 105 } 106 bo->type = domain; 107 bo->pin_count = pinned ? 1 : 0; 108 bo->surface_id = 0; 109 INIT_LIST_HEAD(&bo->list); 110 111 if (surf) 112 bo->surf = *surf; 113 114 qxl_ttm_placement_from_domain(bo, domain, pinned); 115 116 r = ttm_bo_init(&qdev->mman.bdev, &bo->tbo, size, type, 117 &bo->placement, 0, !kernel, NULL, size, 118 NULL, NULL, &qxl_ttm_bo_destroy); 119 if (unlikely(r != 0)) { 120 if (r != -ERESTARTSYS) 121 dev_err(qdev->dev, 122 "object_init failed for (%lu, 0x%08X)\n", 123 size, domain); 124 return r; 125 } 126 *bo_ptr = bo; 127 return 0; 128 } 129 130 int qxl_bo_kmap(struct qxl_bo *bo, void **ptr) 131 { 132 bool is_iomem; 133 int r; 134 135 if (bo->kptr) { 136 if (ptr) 137 *ptr = bo->kptr; 138 return 0; 139 } 140 r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap); 141 if (r) 142 return r; 143 bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem); 144 if (ptr) 145 *ptr = bo->kptr; 146 return 0; 147 } 148 149 void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev, 150 struct qxl_bo *bo, int page_offset) 151 { 152 struct ttm_mem_type_manager *man = &bo->tbo.bdev->man[bo->tbo.mem.mem_type]; 153 void *rptr; 154 int ret; 155 struct io_mapping *map; 156 157 if (bo->tbo.mem.mem_type == TTM_PL_VRAM) 158 map = qdev->vram_mapping; 159 else if (bo->tbo.mem.mem_type == TTM_PL_PRIV0) 160 map = qdev->surface_mapping; 161 else 162 goto fallback; 163 164 (void) ttm_mem_io_lock(man, false); 165 ret = ttm_mem_io_reserve(bo->tbo.bdev, &bo->tbo.mem); 166 ttm_mem_io_unlock(man); 167 168 return io_mapping_map_atomic_wc(map, bo->tbo.mem.bus.offset + page_offset); 169 fallback: 170 if (bo->kptr) { 171 rptr = bo->kptr + (page_offset * PAGE_SIZE); 172 return rptr; 173 } 174 175 ret = qxl_bo_kmap(bo, &rptr); 176 if (ret) 177 return NULL; 178 179 rptr += page_offset * PAGE_SIZE; 180 return rptr; 181 } 182 183 void qxl_bo_kunmap(struct qxl_bo *bo) 184 { 185 if (bo->kptr == NULL) 186 return; 187 bo->kptr = NULL; 188 ttm_bo_kunmap(&bo->kmap); 189 } 190 191 void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev, 192 struct qxl_bo *bo, void *pmap) 193 { 194 struct ttm_mem_type_manager *man = &bo->tbo.bdev->man[bo->tbo.mem.mem_type]; 195 struct io_mapping *map; 196 197 if (bo->tbo.mem.mem_type == TTM_PL_VRAM) 198 map = qdev->vram_mapping; 199 else if (bo->tbo.mem.mem_type == TTM_PL_PRIV0) 200 map = qdev->surface_mapping; 201 else 202 goto fallback; 203 204 io_mapping_unmap_atomic(pmap); 205 206 (void) ttm_mem_io_lock(man, false); 207 ttm_mem_io_free(bo->tbo.bdev, &bo->tbo.mem); 208 ttm_mem_io_unlock(man); 209 return ; 210 fallback: 211 qxl_bo_kunmap(bo); 212 } 213 214 void qxl_bo_unref(struct qxl_bo **bo) 215 { 216 if ((*bo) == NULL) 217 return; 218 219 drm_gem_object_unreference_unlocked(&(*bo)->gem_base); 220 *bo = NULL; 221 } 222 223 struct qxl_bo *qxl_bo_ref(struct qxl_bo *bo) 224 { 225 drm_gem_object_reference(&bo->gem_base); 226 return bo; 227 } 228 229 int qxl_bo_pin(struct qxl_bo *bo, u32 domain, u64 *gpu_addr) 230 { 231 struct qxl_device *qdev = (struct qxl_device *)bo->gem_base.dev->dev_private; 232 int r; 233 234 if (bo->pin_count) { 235 bo->pin_count++; 236 if (gpu_addr) 237 *gpu_addr = qxl_bo_gpu_offset(bo); 238 return 0; 239 } 240 qxl_ttm_placement_from_domain(bo, domain, true); 241 r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false); 242 if (likely(r == 0)) { 243 bo->pin_count = 1; 244 if (gpu_addr != NULL) 245 *gpu_addr = qxl_bo_gpu_offset(bo); 246 } 247 if (unlikely(r != 0)) 248 dev_err(qdev->dev, "%p pin failed\n", bo); 249 return r; 250 } 251 252 int qxl_bo_unpin(struct qxl_bo *bo) 253 { 254 struct qxl_device *qdev = (struct qxl_device *)bo->gem_base.dev->dev_private; 255 int r, i; 256 257 if (!bo->pin_count) { 258 dev_warn(qdev->dev, "%p unpin not necessary\n", bo); 259 return 0; 260 } 261 bo->pin_count--; 262 if (bo->pin_count) 263 return 0; 264 for (i = 0; i < bo->placement.num_placement; i++) 265 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT; 266 r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false); 267 if (unlikely(r != 0)) 268 dev_err(qdev->dev, "%p validate failed for unpin\n", bo); 269 return r; 270 } 271 272 void qxl_bo_force_delete(struct qxl_device *qdev) 273 { 274 struct qxl_bo *bo, *n; 275 276 if (list_empty(&qdev->gem.objects)) 277 return; 278 dev_err(qdev->dev, "Userspace still has active objects !\n"); 279 list_for_each_entry_safe(bo, n, &qdev->gem.objects, list) { 280 dev_err(qdev->dev, "%p %p %lu %lu force free\n", 281 &bo->gem_base, bo, (unsigned long)bo->gem_base.size, 282 *((unsigned long *)&bo->gem_base.refcount)); 283 mutex_lock(&qdev->gem.mutex); 284 list_del_init(&bo->list); 285 mutex_unlock(&qdev->gem.mutex); 286 /* this should unref the ttm bo */ 287 drm_gem_object_unreference_unlocked(&bo->gem_base); 288 } 289 } 290 291 int qxl_bo_init(struct qxl_device *qdev) 292 { 293 return qxl_ttm_init(qdev); 294 } 295 296 void qxl_bo_fini(struct qxl_device *qdev) 297 { 298 qxl_ttm_fini(qdev); 299 } 300 301 int qxl_bo_check_id(struct qxl_device *qdev, struct qxl_bo *bo) 302 { 303 int ret; 304 if (bo->type == QXL_GEM_DOMAIN_SURFACE && bo->surface_id == 0) { 305 /* allocate a surface id for this surface now */ 306 ret = qxl_surface_id_alloc(qdev, bo); 307 if (ret) 308 return ret; 309 310 ret = qxl_hw_surface_alloc(qdev, bo, NULL); 311 if (ret) 312 return ret; 313 } 314 return 0; 315 } 316 317 int qxl_surf_evict(struct qxl_device *qdev) 318 { 319 return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_PRIV0); 320 } 321 322 int qxl_vram_evict(struct qxl_device *qdev) 323 { 324 return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_VRAM); 325 } 326