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