1 /* $NetBSD: qxl_ttm.c,v 1.3 2021/12/18 23:45:42 riastradh Exp $ */ 2 3 /* 4 * Copyright 2013 Red Hat Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: Dave Airlie 25 * Alon Levy 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: qxl_ttm.c,v 1.3 2021/12/18 23:45:42 riastradh Exp $"); 30 31 #include <linux/delay.h> 32 33 #include <drm/drm.h> 34 #include <drm/drm_file.h> 35 #include <drm/drm_debugfs.h> 36 #include <drm/qxl_drm.h> 37 #include <drm/ttm/ttm_bo_api.h> 38 #include <drm/ttm/ttm_bo_driver.h> 39 #include <drm/ttm/ttm_module.h> 40 #include <drm/ttm/ttm_page_alloc.h> 41 #include <drm/ttm/ttm_placement.h> 42 43 #include "qxl_drv.h" 44 #include "qxl_object.h" 45 46 static struct qxl_device *qxl_get_qdev(struct ttm_bo_device *bdev) 47 { 48 struct qxl_mman *mman; 49 struct qxl_device *qdev; 50 51 mman = container_of(bdev, struct qxl_mman, bdev); 52 qdev = container_of(mman, struct qxl_device, mman); 53 return qdev; 54 } 55 56 static int qxl_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags) 57 { 58 return 0; 59 } 60 61 static int qxl_init_mem_type(struct ttm_bo_device *bdev, uint32_t type, 62 struct ttm_mem_type_manager *man) 63 { 64 struct qxl_device *qdev = qxl_get_qdev(bdev); 65 unsigned int gpu_offset_shift = 66 64 - (qdev->rom->slot_gen_bits + qdev->rom->slot_id_bits + 8); 67 struct qxl_memslot *slot; 68 69 switch (type) { 70 case TTM_PL_SYSTEM: 71 /* System memory */ 72 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE; 73 man->available_caching = TTM_PL_MASK_CACHING; 74 man->default_caching = TTM_PL_FLAG_CACHED; 75 break; 76 case TTM_PL_VRAM: 77 case TTM_PL_PRIV: 78 /* "On-card" video ram */ 79 slot = (type == TTM_PL_VRAM) ? 80 &qdev->main_slot : &qdev->surfaces_slot; 81 slot->gpu_offset = (uint64_t)type << gpu_offset_shift; 82 man->func = &ttm_bo_manager_func; 83 man->gpu_offset = slot->gpu_offset; 84 man->flags = TTM_MEMTYPE_FLAG_FIXED | 85 TTM_MEMTYPE_FLAG_MAPPABLE; 86 man->available_caching = TTM_PL_MASK_CACHING; 87 man->default_caching = TTM_PL_FLAG_CACHED; 88 break; 89 default: 90 DRM_ERROR("Unsupported memory type %u\n", (unsigned int)type); 91 return -EINVAL; 92 } 93 return 0; 94 } 95 96 static void qxl_evict_flags(struct ttm_buffer_object *bo, 97 struct ttm_placement *placement) 98 { 99 struct qxl_bo *qbo; 100 static const struct ttm_place placements = { 101 .fpfn = 0, 102 .lpfn = 0, 103 .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM 104 }; 105 106 if (!qxl_ttm_bo_is_qxl_bo(bo)) { 107 placement->placement = &placements; 108 placement->busy_placement = &placements; 109 placement->num_placement = 1; 110 placement->num_busy_placement = 1; 111 return; 112 } 113 qbo = to_qxl_bo(bo); 114 qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU, false); 115 *placement = qbo->placement; 116 } 117 118 int qxl_ttm_io_mem_reserve(struct ttm_bo_device *bdev, 119 struct ttm_mem_reg *mem) 120 { 121 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; 122 struct qxl_device *qdev = qxl_get_qdev(bdev); 123 124 mem->bus.addr = NULL; 125 mem->bus.offset = 0; 126 mem->bus.size = mem->num_pages << PAGE_SHIFT; 127 mem->bus.base = 0; 128 mem->bus.is_iomem = false; 129 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE)) 130 return -EINVAL; 131 switch (mem->mem_type) { 132 case TTM_PL_SYSTEM: 133 /* system memory */ 134 return 0; 135 case TTM_PL_VRAM: 136 mem->bus.is_iomem = true; 137 mem->bus.base = qdev->vram_base; 138 mem->bus.offset = mem->start << PAGE_SHIFT; 139 break; 140 case TTM_PL_PRIV: 141 mem->bus.is_iomem = true; 142 mem->bus.base = qdev->surfaceram_base; 143 mem->bus.offset = mem->start << PAGE_SHIFT; 144 break; 145 default: 146 return -EINVAL; 147 } 148 return 0; 149 } 150 151 static void qxl_ttm_io_mem_free(struct ttm_bo_device *bdev, 152 struct ttm_mem_reg *mem) 153 { 154 } 155 156 /* 157 * TTM backend functions. 158 */ 159 struct qxl_ttm_tt { 160 struct ttm_tt ttm; 161 struct qxl_device *qdev; 162 u64 offset; 163 }; 164 165 static int qxl_ttm_backend_bind(struct ttm_tt *ttm, 166 struct ttm_mem_reg *bo_mem) 167 { 168 struct qxl_ttm_tt *gtt = (void *)ttm; 169 170 gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT); 171 if (!ttm->num_pages) { 172 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n", 173 ttm->num_pages, bo_mem, ttm); 174 } 175 /* Not implemented */ 176 return -1; 177 } 178 179 static int qxl_ttm_backend_unbind(struct ttm_tt *ttm) 180 { 181 /* Not implemented */ 182 return -1; 183 } 184 185 static void qxl_ttm_backend_destroy(struct ttm_tt *ttm) 186 { 187 struct qxl_ttm_tt *gtt = (void *)ttm; 188 189 ttm_tt_fini(>t->ttm); 190 kfree(gtt); 191 } 192 193 static struct ttm_backend_func qxl_backend_func = { 194 .bind = &qxl_ttm_backend_bind, 195 .unbind = &qxl_ttm_backend_unbind, 196 .destroy = &qxl_ttm_backend_destroy, 197 }; 198 199 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_buffer_object *bo, 200 uint32_t page_flags) 201 { 202 struct qxl_device *qdev; 203 struct qxl_ttm_tt *gtt; 204 205 qdev = qxl_get_qdev(bo->bdev); 206 gtt = kzalloc(sizeof(struct qxl_ttm_tt), GFP_KERNEL); 207 if (gtt == NULL) 208 return NULL; 209 gtt->ttm.func = &qxl_backend_func; 210 gtt->qdev = qdev; 211 if (ttm_tt_init(>t->ttm, bo, page_flags)) { 212 kfree(gtt); 213 return NULL; 214 } 215 return >t->ttm; 216 } 217 218 static void qxl_move_null(struct ttm_buffer_object *bo, 219 struct ttm_mem_reg *new_mem) 220 { 221 struct ttm_mem_reg *old_mem = &bo->mem; 222 223 BUG_ON(old_mem->mm_node != NULL); 224 *old_mem = *new_mem; 225 new_mem->mm_node = NULL; 226 } 227 228 static int qxl_bo_move(struct ttm_buffer_object *bo, bool evict, 229 struct ttm_operation_ctx *ctx, 230 struct ttm_mem_reg *new_mem) 231 { 232 struct ttm_mem_reg *old_mem = &bo->mem; 233 int ret; 234 235 ret = ttm_bo_wait(bo, ctx->interruptible, ctx->no_wait_gpu); 236 if (ret) 237 return ret; 238 239 if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { 240 qxl_move_null(bo, new_mem); 241 return 0; 242 } 243 return ttm_bo_move_memcpy(bo, ctx, new_mem); 244 } 245 246 static void qxl_bo_move_notify(struct ttm_buffer_object *bo, 247 bool evict, 248 struct ttm_mem_reg *new_mem) 249 { 250 struct qxl_bo *qbo; 251 struct qxl_device *qdev; 252 253 if (!qxl_ttm_bo_is_qxl_bo(bo)) 254 return; 255 qbo = to_qxl_bo(bo); 256 qdev = qbo->tbo.base.dev->dev_private; 257 258 if (bo->mem.mem_type == TTM_PL_PRIV && qbo->surface_id) 259 qxl_surface_evict(qdev, qbo, new_mem ? true : false); 260 } 261 262 static struct ttm_bo_driver qxl_bo_driver = { 263 .ttm_tt_create = &qxl_ttm_tt_create, 264 .invalidate_caches = &qxl_invalidate_caches, 265 .init_mem_type = &qxl_init_mem_type, 266 .eviction_valuable = ttm_bo_eviction_valuable, 267 .evict_flags = &qxl_evict_flags, 268 .move = &qxl_bo_move, 269 .io_mem_reserve = &qxl_ttm_io_mem_reserve, 270 .io_mem_free = &qxl_ttm_io_mem_free, 271 .move_notify = &qxl_bo_move_notify, 272 }; 273 274 int qxl_ttm_init(struct qxl_device *qdev) 275 { 276 int r; 277 int num_io_pages; /* != rom->num_io_pages, we include surface0 */ 278 279 /* No others user of address space so set it to 0 */ 280 r = ttm_bo_device_init(&qdev->mman.bdev, 281 &qxl_bo_driver, 282 qdev->ddev.anon_inode->i_mapping, 283 qdev->ddev.vma_offset_manager, 284 false); 285 if (r) { 286 DRM_ERROR("failed initializing buffer object driver(%d).\n", r); 287 return r; 288 } 289 /* NOTE: this includes the framebuffer (aka surface 0) */ 290 num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE; 291 r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_VRAM, 292 num_io_pages); 293 if (r) { 294 DRM_ERROR("Failed initializing VRAM heap.\n"); 295 return r; 296 } 297 r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_PRIV, 298 qdev->surfaceram_size / PAGE_SIZE); 299 if (r) { 300 DRM_ERROR("Failed initializing Surfaces heap.\n"); 301 return r; 302 } 303 DRM_INFO("qxl: %uM of VRAM memory size\n", 304 (unsigned int)qdev->vram_size / (1024 * 1024)); 305 DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n", 306 ((unsigned int)num_io_pages * PAGE_SIZE) / (1024 * 1024)); 307 DRM_INFO("qxl: %uM of Surface memory size\n", 308 (unsigned int)qdev->surfaceram_size / (1024 * 1024)); 309 return 0; 310 } 311 312 void qxl_ttm_fini(struct qxl_device *qdev) 313 { 314 ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_VRAM); 315 ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_PRIV); 316 ttm_bo_device_release(&qdev->mman.bdev); 317 DRM_INFO("qxl: ttm finalized\n"); 318 } 319 320 #define QXL_DEBUGFS_MEM_TYPES 2 321 322 #if defined(CONFIG_DEBUG_FS) 323 static int qxl_mm_dump_table(struct seq_file *m, void *data) 324 { 325 struct drm_info_node *node = (struct drm_info_node *)m->private; 326 struct drm_mm *mm = (struct drm_mm *)node->info_ent->data; 327 struct drm_printer p = drm_seq_file_printer(m); 328 329 spin_lock(&ttm_bo_glob.lru_lock); 330 drm_mm_print(mm, &p); 331 spin_unlock(&ttm_bo_glob.lru_lock); 332 return 0; 333 } 334 #endif 335 336 int qxl_ttm_debugfs_init(struct qxl_device *qdev) 337 { 338 #if defined(CONFIG_DEBUG_FS) 339 static struct drm_info_list qxl_mem_types_list[QXL_DEBUGFS_MEM_TYPES]; 340 static char qxl_mem_types_names[QXL_DEBUGFS_MEM_TYPES][32]; 341 unsigned int i; 342 343 for (i = 0; i < QXL_DEBUGFS_MEM_TYPES; i++) { 344 if (i == 0) 345 sprintf(qxl_mem_types_names[i], "qxl_mem_mm"); 346 else 347 sprintf(qxl_mem_types_names[i], "qxl_surf_mm"); 348 qxl_mem_types_list[i].name = qxl_mem_types_names[i]; 349 qxl_mem_types_list[i].show = &qxl_mm_dump_table; 350 qxl_mem_types_list[i].driver_features = 0; 351 if (i == 0) 352 qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_VRAM].priv; 353 else 354 qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_PRIV].priv; 355 356 } 357 return qxl_debugfs_add_files(qdev, qxl_mem_types_list, i); 358 #else 359 return 0; 360 #endif 361 } 362
Indexes created Sun Sep 21 14:09:52 GMT 2025