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 <drm/ttm/ttm_bo_api.h> 27 #include <drm/ttm/ttm_bo_driver.h> 28 #include <drm/ttm/ttm_placement.h> 29 #include <drm/ttm/ttm_page_alloc.h> 30 #include <drm/ttm/ttm_module.h> 31 #include <drm/drmP.h> 32 #include <drm/drm.h> 33 #include <drm/qxl_drm.h> 34 #include "qxl_drv.h" 35 #include "qxl_object.h" 36 37 #include <linux/delay.h> 38 39 static struct qxl_device *qxl_get_qdev(struct ttm_bo_device *bdev) 40 { 41 struct qxl_mman *mman; 42 struct qxl_device *qdev; 43 44 mman = container_of(bdev, struct qxl_mman, bdev); 45 qdev = container_of(mman, struct qxl_device, mman); 46 return qdev; 47 } 48 49 static struct vm_operations_struct qxl_ttm_vm_ops; 50 static const struct vm_operations_struct *ttm_vm_ops; 51 52 static vm_fault_t qxl_ttm_fault(struct vm_fault *vmf) 53 { 54 struct ttm_buffer_object *bo; 55 vm_fault_t ret; 56 57 bo = (struct ttm_buffer_object *)vmf->vma->vm_private_data; 58 if (bo == NULL) 59 return VM_FAULT_NOPAGE; 60 ret = ttm_vm_ops->fault(vmf); 61 return ret; 62 } 63 64 int qxl_mmap(struct file *filp, struct vm_area_struct *vma) 65 { 66 struct drm_file *file_priv; 67 struct qxl_device *qdev; 68 int r; 69 70 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) 71 return -EINVAL; 72 73 file_priv = filp->private_data; 74 qdev = file_priv->minor->dev->dev_private; 75 if (qdev == NULL) { 76 DRM_ERROR( 77 "filp->private_data->minor->dev->dev_private == NULL\n"); 78 return -EINVAL; 79 } 80 DRM_DEBUG_DRIVER("filp->private_data = 0x%p, vma->vm_pgoff = %lx\n", 81 filp->private_data, vma->vm_pgoff); 82 83 r = ttm_bo_mmap(filp, vma, &qdev->mman.bdev); 84 if (unlikely(r != 0)) 85 return r; 86 if (unlikely(ttm_vm_ops == NULL)) { 87 ttm_vm_ops = vma->vm_ops; 88 qxl_ttm_vm_ops = *ttm_vm_ops; 89 qxl_ttm_vm_ops.fault = &qxl_ttm_fault; 90 } 91 vma->vm_ops = &qxl_ttm_vm_ops; 92 return 0; 93 } 94 95 static int qxl_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags) 96 { 97 return 0; 98 } 99 100 static int qxl_init_mem_type(struct ttm_bo_device *bdev, uint32_t type, 101 struct ttm_mem_type_manager *man) 102 { 103 struct qxl_device *qdev = qxl_get_qdev(bdev); 104 unsigned int gpu_offset_shift = 105 64 - (qdev->rom->slot_gen_bits + qdev->rom->slot_id_bits + 8); 106 struct qxl_memslot *slot; 107 108 switch (type) { 109 case TTM_PL_SYSTEM: 110 /* System memory */ 111 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE; 112 man->available_caching = TTM_PL_MASK_CACHING; 113 man->default_caching = TTM_PL_FLAG_CACHED; 114 break; 115 case TTM_PL_VRAM: 116 case TTM_PL_PRIV: 117 /* "On-card" video ram */ 118 slot = (type == TTM_PL_VRAM) ? 119 &qdev->main_slot : &qdev->surfaces_slot; 120 slot->gpu_offset = (uint64_t)type << gpu_offset_shift; 121 man->func = &ttm_bo_manager_func; 122 man->gpu_offset = slot->gpu_offset; 123 man->flags = TTM_MEMTYPE_FLAG_FIXED | 124 TTM_MEMTYPE_FLAG_MAPPABLE; 125 man->available_caching = TTM_PL_MASK_CACHING; 126 man->default_caching = TTM_PL_FLAG_CACHED; 127 break; 128 default: 129 DRM_ERROR("Unsupported memory type %u\n", (unsigned int)type); 130 return -EINVAL; 131 } 132 return 0; 133 } 134 135 static void qxl_evict_flags(struct ttm_buffer_object *bo, 136 struct ttm_placement *placement) 137 { 138 struct qxl_bo *qbo; 139 static const struct ttm_place placements = { 140 .fpfn = 0, 141 .lpfn = 0, 142 .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM 143 }; 144 145 if (!qxl_ttm_bo_is_qxl_bo(bo)) { 146 placement->placement = &placements; 147 placement->busy_placement = &placements; 148 placement->num_placement = 1; 149 placement->num_busy_placement = 1; 150 return; 151 } 152 qbo = to_qxl_bo(bo); 153 qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU, false); 154 *placement = qbo->placement; 155 } 156 157 static int qxl_verify_access(struct ttm_buffer_object *bo, struct file *filp) 158 { 159 struct qxl_bo *qbo = to_qxl_bo(bo); 160 161 return drm_vma_node_verify_access(&qbo->gem_base.vma_node, 162 filp->private_data); 163 } 164 165 static int qxl_ttm_io_mem_reserve(struct ttm_bo_device *bdev, 166 struct ttm_mem_reg *mem) 167 { 168 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; 169 struct qxl_device *qdev = qxl_get_qdev(bdev); 170 171 mem->bus.addr = NULL; 172 mem->bus.offset = 0; 173 mem->bus.size = mem->num_pages << PAGE_SHIFT; 174 mem->bus.base = 0; 175 mem->bus.is_iomem = false; 176 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE)) 177 return -EINVAL; 178 switch (mem->mem_type) { 179 case TTM_PL_SYSTEM: 180 /* system memory */ 181 return 0; 182 case TTM_PL_VRAM: 183 mem->bus.is_iomem = true; 184 mem->bus.base = qdev->vram_base; 185 mem->bus.offset = mem->start << PAGE_SHIFT; 186 break; 187 case TTM_PL_PRIV: 188 mem->bus.is_iomem = true; 189 mem->bus.base = qdev->surfaceram_base; 190 mem->bus.offset = mem->start << PAGE_SHIFT; 191 break; 192 default: 193 return -EINVAL; 194 } 195 return 0; 196 } 197 198 static void qxl_ttm_io_mem_free(struct ttm_bo_device *bdev, 199 struct ttm_mem_reg *mem) 200 { 201 } 202 203 /* 204 * TTM backend functions. 205 */ 206 struct qxl_ttm_tt { 207 struct ttm_tt ttm; 208 struct qxl_device *qdev; 209 u64 offset; 210 }; 211 212 static int qxl_ttm_backend_bind(struct ttm_tt *ttm, 213 struct ttm_mem_reg *bo_mem) 214 { 215 struct qxl_ttm_tt *gtt = (void *)ttm; 216 217 gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT); 218 if (!ttm->num_pages) { 219 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n", 220 ttm->num_pages, bo_mem, ttm); 221 } 222 /* Not implemented */ 223 return -1; 224 } 225 226 static int qxl_ttm_backend_unbind(struct ttm_tt *ttm) 227 { 228 /* Not implemented */ 229 return -1; 230 } 231 232 static void qxl_ttm_backend_destroy(struct ttm_tt *ttm) 233 { 234 struct qxl_ttm_tt *gtt = (void *)ttm; 235 236 ttm_tt_fini(>t->ttm); 237 kfree(gtt); 238 } 239 240 static struct ttm_backend_func qxl_backend_func = { 241 .bind = &qxl_ttm_backend_bind, 242 .unbind = &qxl_ttm_backend_unbind, 243 .destroy = &qxl_ttm_backend_destroy, 244 }; 245 246 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_buffer_object *bo, 247 uint32_t page_flags) 248 { 249 struct qxl_device *qdev; 250 struct qxl_ttm_tt *gtt; 251 252 qdev = qxl_get_qdev(bo->bdev); 253 gtt = kzalloc(sizeof(struct qxl_ttm_tt), GFP_KERNEL); 254 if (gtt == NULL) 255 return NULL; 256 gtt->ttm.func = &qxl_backend_func; 257 gtt->qdev = qdev; 258 if (ttm_tt_init(>t->ttm, bo, page_flags)) { 259 kfree(gtt); 260 return NULL; 261 } 262 return >t->ttm; 263 } 264 265 static void qxl_move_null(struct ttm_buffer_object *bo, 266 struct ttm_mem_reg *new_mem) 267 { 268 struct ttm_mem_reg *old_mem = &bo->mem; 269 270 BUG_ON(old_mem->mm_node != NULL); 271 *old_mem = *new_mem; 272 new_mem->mm_node = NULL; 273 } 274 275 static int qxl_bo_move(struct ttm_buffer_object *bo, bool evict, 276 struct ttm_operation_ctx *ctx, 277 struct ttm_mem_reg *new_mem) 278 { 279 struct ttm_mem_reg *old_mem = &bo->mem; 280 int ret; 281 282 ret = ttm_bo_wait(bo, ctx->interruptible, ctx->no_wait_gpu); 283 if (ret) 284 return ret; 285 286 if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { 287 qxl_move_null(bo, new_mem); 288 return 0; 289 } 290 return ttm_bo_move_memcpy(bo, ctx, new_mem); 291 } 292 293 static void qxl_bo_move_notify(struct ttm_buffer_object *bo, 294 bool evict, 295 struct ttm_mem_reg *new_mem) 296 { 297 struct qxl_bo *qbo; 298 struct qxl_device *qdev; 299 300 if (!qxl_ttm_bo_is_qxl_bo(bo)) 301 return; 302 qbo = to_qxl_bo(bo); 303 qdev = qbo->gem_base.dev->dev_private; 304 305 if (bo->mem.mem_type == TTM_PL_PRIV && qbo->surface_id) 306 qxl_surface_evict(qdev, qbo, new_mem ? true : false); 307 } 308 309 static struct ttm_bo_driver qxl_bo_driver = { 310 .ttm_tt_create = &qxl_ttm_tt_create, 311 .invalidate_caches = &qxl_invalidate_caches, 312 .init_mem_type = &qxl_init_mem_type, 313 .eviction_valuable = ttm_bo_eviction_valuable, 314 .evict_flags = &qxl_evict_flags, 315 .move = &qxl_bo_move, 316 .verify_access = &qxl_verify_access, 317 .io_mem_reserve = &qxl_ttm_io_mem_reserve, 318 .io_mem_free = &qxl_ttm_io_mem_free, 319 .move_notify = &qxl_bo_move_notify, 320 }; 321 322 int qxl_ttm_init(struct qxl_device *qdev) 323 { 324 int r; 325 int num_io_pages; /* != rom->num_io_pages, we include surface0 */ 326 327 /* No others user of address space so set it to 0 */ 328 r = ttm_bo_device_init(&qdev->mman.bdev, 329 &qxl_bo_driver, 330 qdev->ddev.anon_inode->i_mapping, 331 DRM_FILE_PAGE_OFFSET, 0); 332 if (r) { 333 DRM_ERROR("failed initializing buffer object driver(%d).\n", r); 334 return r; 335 } 336 /* NOTE: this includes the framebuffer (aka surface 0) */ 337 num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE; 338 r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_VRAM, 339 num_io_pages); 340 if (r) { 341 DRM_ERROR("Failed initializing VRAM heap.\n"); 342 return r; 343 } 344 r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_PRIV, 345 qdev->surfaceram_size / PAGE_SIZE); 346 if (r) { 347 DRM_ERROR("Failed initializing Surfaces heap.\n"); 348 return r; 349 } 350 DRM_INFO("qxl: %uM of VRAM memory size\n", 351 (unsigned int)qdev->vram_size / (1024 * 1024)); 352 DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n", 353 ((unsigned int)num_io_pages * PAGE_SIZE) / (1024 * 1024)); 354 DRM_INFO("qxl: %uM of Surface memory size\n", 355 (unsigned int)qdev->surfaceram_size / (1024 * 1024)); 356 return 0; 357 } 358 359 void qxl_ttm_fini(struct qxl_device *qdev) 360 { 361 ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_VRAM); 362 ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_PRIV); 363 ttm_bo_device_release(&qdev->mman.bdev); 364 DRM_INFO("qxl: ttm finalized\n"); 365 } 366 367 #define QXL_DEBUGFS_MEM_TYPES 2 368 369 #if defined(CONFIG_DEBUG_FS) 370 static int qxl_mm_dump_table(struct seq_file *m, void *data) 371 { 372 struct drm_info_node *node = (struct drm_info_node *)m->private; 373 struct drm_mm *mm = (struct drm_mm *)node->info_ent->data; 374 struct drm_device *dev = node->minor->dev; 375 struct qxl_device *rdev = dev->dev_private; 376 struct ttm_bo_global *glob = rdev->mman.bdev.glob; 377 struct drm_printer p = drm_seq_file_printer(m); 378 379 spin_lock(&glob->lru_lock); 380 drm_mm_print(mm, &p); 381 spin_unlock(&glob->lru_lock); 382 return 0; 383 } 384 #endif 385 386 int qxl_ttm_debugfs_init(struct qxl_device *qdev) 387 { 388 #if defined(CONFIG_DEBUG_FS) 389 static struct drm_info_list qxl_mem_types_list[QXL_DEBUGFS_MEM_TYPES]; 390 static char qxl_mem_types_names[QXL_DEBUGFS_MEM_TYPES][32]; 391 unsigned int i; 392 393 for (i = 0; i < QXL_DEBUGFS_MEM_TYPES; i++) { 394 if (i == 0) 395 sprintf(qxl_mem_types_names[i], "qxl_mem_mm"); 396 else 397 sprintf(qxl_mem_types_names[i], "qxl_surf_mm"); 398 qxl_mem_types_list[i].name = qxl_mem_types_names[i]; 399 qxl_mem_types_list[i].show = &qxl_mm_dump_table; 400 qxl_mem_types_list[i].driver_features = 0; 401 if (i == 0) 402 qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_VRAM].priv; 403 else 404 qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_PRIV].priv; 405 406 } 407 return qxl_debugfs_add_files(qdev, qxl_mem_types_list, i); 408 #else 409 return 0; 410 #endif 411 } 412