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