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