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