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