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