drivers/gpu/drm/qxl/qxl_ttm.c

   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 <ttm/ttm_bo_api.h>
  27 #include <ttm/ttm_bo_driver.h>
  28 #include <ttm/ttm_placement.h>
  29 #include <ttm/ttm_page_alloc.h>
  30 #include <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 static int qxl_ttm_debugfs_init(struct qxl_device *qdev);
  39
  40 static struct qxl_device *qxl_get_qdev(struct ttm_bo_device *bdev)
  41 {
  42         struct qxl_mman *mman;
  43         struct qxl_device *qdev;
  44
  45         mman = container_of(bdev, struct qxl_mman, bdev);
  46         qdev = container_of(mman, struct qxl_device, mman);
  47         return qdev;
  48 }
  49
  50 static int qxl_ttm_mem_global_init(struct drm_global_reference *ref)
  51 {
  52         return ttm_mem_global_init(ref->object);
  53 }
  54
  55 static void qxl_ttm_mem_global_release(struct drm_global_reference *ref)
  56 {
  57         ttm_mem_global_release(ref->object);
  58 }
  59
  60 static int qxl_ttm_global_init(struct qxl_device *qdev)
  61 {
  62         struct drm_global_reference *global_ref;
  63         int r;
  64
  65         qdev->mman.mem_global_referenced = false;
  66         global_ref = &qdev->mman.mem_global_ref;
  67         global_ref->global_type = DRM_GLOBAL_TTM_MEM;
  68         global_ref->size = sizeof(struct ttm_mem_global);
  69         global_ref->init = &qxl_ttm_mem_global_init;
  70         global_ref->release = &qxl_ttm_mem_global_release;
  71
  72         r = drm_global_item_ref(global_ref);
  73         if (r != 0) {
  74                 DRM_ERROR("Failed setting up TTM memory accounting "
  75                           "subsystem.\n");
  76                 return r;
  77         }
  78
  79         qdev->mman.bo_global_ref.mem_glob =
  80                 qdev->mman.mem_global_ref.object;
  81         global_ref = &qdev->mman.bo_global_ref.ref;
  82         global_ref->global_type = DRM_GLOBAL_TTM_BO;
  83         global_ref->size = sizeof(struct ttm_bo_global);
  84         global_ref->init = &ttm_bo_global_init;
  85         global_ref->release = &ttm_bo_global_release;
  86         r = drm_global_item_ref(global_ref);
  87         if (r != 0) {
  88                 DRM_ERROR("Failed setting up TTM BO subsystem.\n");
  89                 drm_global_item_unref(&qdev->mman.mem_global_ref);
  90                 return r;
  91         }
  92
  93         qdev->mman.mem_global_referenced = true;
  94         return 0;
  95 }
  96
  97 static void qxl_ttm_global_fini(struct qxl_device *qdev)
  98 {
  99         if (qdev->mman.mem_global_referenced) {
 100                 drm_global_item_unref(&qdev->mman.bo_global_ref.ref);
 101                 drm_global_item_unref(&qdev->mman.mem_global_ref);
 102                 qdev->mman.mem_global_referenced = false;
 103         }
 104 }
 105
 106 static struct vm_operations_struct qxl_ttm_vm_ops;
 107 static const struct vm_operations_struct *ttm_vm_ops;
 108
 109 static int qxl_ttm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 110 {
 111         struct ttm_buffer_object *bo;
 112         int r;
 113
 114         bo = (struct ttm_buffer_object *)vma->vm_private_data;
 115         if (bo == NULL)
 116                 return VM_FAULT_NOPAGE;
 117         r = ttm_vm_ops->fault(vma, vmf);
 118         return r;
 119 }
 120
 121 int qxl_mmap(struct file *filp, struct vm_area_struct *vma)
 122 {
 123         struct drm_file *file_priv;
 124         struct qxl_device *qdev;
 125         int r;
 126
 127         if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) {
 128                 pr_info("%s: vma->vm_pgoff (%ld) < DRM_FILE_PAGE_OFFSET\n",
 129                         __func__, vma->vm_pgoff);
 130                 return -EINVAL;
 131         }
 132
 133         file_priv = filp->private_data;
 134         qdev = file_priv->minor->dev->dev_private;
 135         if (qdev == NULL) {
 136                 DRM_ERROR(
 137                  "filp->private_data->minor->dev->dev_private == NULL\n");
 138                 return -EINVAL;
 139         }
 140         QXL_INFO(qdev, "%s: filp->private_data = 0x%p, vma->vm_pgoff = %lx\n",
 141                  __func__, filp->private_data, vma->vm_pgoff);
 142
 143         r = ttm_bo_mmap(filp, vma, &qdev->mman.bdev);
 144         if (unlikely(r != 0))
 145                 return r;
 146         if (unlikely(ttm_vm_ops == NULL)) {
 147                 ttm_vm_ops = vma->vm_ops;
 148                 qxl_ttm_vm_ops = *ttm_vm_ops;
 149                 qxl_ttm_vm_ops.fault = &qxl_ttm_fault;
 150         }
 151         vma->vm_ops = &qxl_ttm_vm_ops;
 152         return 0;
 153 }
 154
 155 static int qxl_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
 156 {
 157         return 0;
 158 }
 159
 160 static int qxl_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 161                              struct ttm_mem_type_manager *man)
 162 {
 163         switch (type) {
 164         case TTM_PL_SYSTEM:
 165                 /* System memory */
 166                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
 167                 man->available_caching = TTM_PL_MASK_CACHING;
 168                 man->default_caching = TTM_PL_FLAG_CACHED;
 169                 break;
 170         case TTM_PL_VRAM:
 171         case TTM_PL_PRIV:
 172                 /* "On-card" video ram */
 173                 man->func = &ttm_bo_manager_func;
 174                 man->gpu_offset = 0;
 175                 man->flags = TTM_MEMTYPE_FLAG_FIXED |
 176                              TTM_MEMTYPE_FLAG_MAPPABLE;
 177                 man->available_caching = TTM_PL_MASK_CACHING;
 178                 man->default_caching = TTM_PL_FLAG_CACHED;
 179                 break;
 180         default:
 181                 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
 182                 return -EINVAL;
 183         }
 184         return 0;
 185 }
 186
 187 static void qxl_evict_flags(struct ttm_buffer_object *bo,
 188                                 struct ttm_placement *placement)
 189 {
 190         struct qxl_bo *qbo;
 191         static struct ttm_place placements = {
 192                 .fpfn = 0,
 193                 .lpfn = 0,
 194                 .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM
 195         };
 196
 197         if (!qxl_ttm_bo_is_qxl_bo(bo)) {
 198                 placement->placement = &placements;
 199                 placement->busy_placement = &placements;
 200                 placement->num_placement = 1;
 201                 placement->num_busy_placement = 1;
 202                 return;
 203         }
 204         qbo = to_qxl_bo(bo);
 205         qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU, false);
 206         *placement = qbo->placement;
 207 }
 208
 209 static int qxl_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 210 {
 211         struct qxl_bo *qbo = to_qxl_bo(bo);
 212
 213         return drm_vma_node_verify_access(&qbo->gem_base.vma_node,
 214                                           filp->private_data);
 215 }
 216
 217 static int qxl_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
 218                                   struct ttm_mem_reg *mem)
 219 {
 220         struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 221         struct qxl_device *qdev = qxl_get_qdev(bdev);
 222
 223         mem->bus.addr = NULL;
 224         mem->bus.offset = 0;
 225         mem->bus.size = mem->num_pages << PAGE_SHIFT;
 226         mem->bus.base = 0;
 227         mem->bus.is_iomem = false;
 228         if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
 229                 return -EINVAL;
 230         switch (mem->mem_type) {
 231         case TTM_PL_SYSTEM:
 232                 /* system memory */
 233                 return 0;
 234         case TTM_PL_VRAM:
 235                 mem->bus.is_iomem = true;
 236                 mem->bus.base = qdev->vram_base;
 237                 mem->bus.offset = mem->start << PAGE_SHIFT;
 238                 break;
 239         case TTM_PL_PRIV:
 240                 mem->bus.is_iomem = true;
 241                 mem->bus.base = qdev->surfaceram_base;
 242                 mem->bus.offset = mem->start << PAGE_SHIFT;
 243                 break;
 244         default:
 245                 return -EINVAL;
 246         }
 247         return 0;
 248 }
 249
 250 static void qxl_ttm_io_mem_free(struct ttm_bo_device *bdev,
 251                                 struct ttm_mem_reg *mem)
 252 {
 253 }
 254
 255 /*
 256  * TTM backend functions.
 257  */
 258 struct qxl_ttm_tt {
 259         struct ttm_dma_tt               ttm;
 260         struct qxl_device               *qdev;
 261         u64                             offset;
 262 };
 263
 264 static int qxl_ttm_backend_bind(struct ttm_tt *ttm,
 265                                 struct ttm_mem_reg *bo_mem)
 266 {
 267         struct qxl_ttm_tt *gtt = (void *)ttm;
 268
 269         gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
 270         if (!ttm->num_pages) {
 271                 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
 272                      ttm->num_pages, bo_mem, ttm);
 273         }
 274         /* Not implemented */
 275         return -1;
 276 }
 277
 278 static int qxl_ttm_backend_unbind(struct ttm_tt *ttm)
 279 {
 280         /* Not implemented */
 281         return -1;
 282 }
 283
 284 static void qxl_ttm_backend_destroy(struct ttm_tt *ttm)
 285 {
 286         struct qxl_ttm_tt *gtt = (void *)ttm;
 287
 288         ttm_dma_tt_fini(&gtt->ttm);
 289         kfree(gtt);
 290 }
 291
 292 static struct ttm_backend_func qxl_backend_func = {
 293         .bind = &qxl_ttm_backend_bind,
 294         .unbind = &qxl_ttm_backend_unbind,
 295         .destroy = &qxl_ttm_backend_destroy,
 296 };
 297
 298 static int qxl_ttm_tt_populate(struct ttm_tt *ttm)
 299 {
 300         int r;
 301
 302         if (ttm->state != tt_unpopulated)
 303                 return 0;
 304
 305         r = ttm_pool_populate(ttm);
 306         if (r)
 307                 return r;
 308
 309         return 0;
 310 }
 311
 312 static void qxl_ttm_tt_unpopulate(struct ttm_tt *ttm)
 313 {
 314         ttm_pool_unpopulate(ttm);
 315 }
 316
 317 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_bo_device *bdev,
 318                                         unsigned long size, uint32_t page_flags,
 319                                         struct page *dummy_read_page)
 320 {
 321         struct qxl_device *qdev;
 322         struct qxl_ttm_tt *gtt;
 323
 324         qdev = qxl_get_qdev(bdev);
 325         gtt = kzalloc(sizeof(struct qxl_ttm_tt), GFP_KERNEL);
 326         if (gtt == NULL)
 327                 return NULL;
 328         gtt->ttm.ttm.func = &qxl_backend_func;
 329         gtt->qdev = qdev;
 330         if (ttm_dma_tt_init(&gtt->ttm, bdev, size, page_flags,
 331                             dummy_read_page)) {
 332                 kfree(gtt);
 333                 return NULL;
 334         }
 335         return &gtt->ttm.ttm;
 336 }
 337
 338 static void qxl_move_null(struct ttm_buffer_object *bo,
 339                              struct ttm_mem_reg *new_mem)
 340 {
 341         struct ttm_mem_reg *old_mem = &bo->mem;
 342
 343         BUG_ON(old_mem->mm_node != NULL);
 344         *old_mem = *new_mem;
 345         new_mem->mm_node = NULL;
 346 }
 347
 348 static int qxl_bo_move(struct ttm_buffer_object *bo,
 349                        bool evict, bool interruptible,
 350                        bool no_wait_gpu,
 351                        struct ttm_mem_reg *new_mem)
 352 {
 353         struct ttm_mem_reg *old_mem = &bo->mem;
 354         int ret;
 355
 356         ret = ttm_bo_wait(bo, interruptible, no_wait_gpu);
 357         if (ret)
 358                 return ret;
 359
 360
 361         if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
 362                 qxl_move_null(bo, new_mem);
 363                 return 0;
 364         }
 365         return ttm_bo_move_memcpy(bo, interruptible, no_wait_gpu,
 366                                   new_mem);
 367 }
 368
 369 static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
 370                                struct ttm_mem_reg *new_mem)
 371 {
 372         struct qxl_bo *qbo;
 373         struct qxl_device *qdev;
 374
 375         if (!qxl_ttm_bo_is_qxl_bo(bo))
 376                 return;
 377         qbo = to_qxl_bo(bo);
 378         qdev = qbo->gem_base.dev->dev_private;
 379
 380         if (bo->mem.mem_type == TTM_PL_PRIV && qbo->surface_id)
 381                 qxl_surface_evict(qdev, qbo, new_mem ? true : false);
 382 }
 383
 384 static struct ttm_bo_driver qxl_bo_driver = {
 385         .ttm_tt_create = &qxl_ttm_tt_create,
 386         .ttm_tt_populate = &qxl_ttm_tt_populate,
 387         .ttm_tt_unpopulate = &qxl_ttm_tt_unpopulate,
 388         .invalidate_caches = &qxl_invalidate_caches,
 389         .init_mem_type = &qxl_init_mem_type,
 390         .evict_flags = &qxl_evict_flags,
 391         .move = &qxl_bo_move,
 392         .verify_access = &qxl_verify_access,
 393         .io_mem_reserve = &qxl_ttm_io_mem_reserve,
 394         .io_mem_free = &qxl_ttm_io_mem_free,
 395         .move_notify = &qxl_bo_move_notify,
 396         .lru_tail = &ttm_bo_default_lru_tail,
 397         .swap_lru_tail = &ttm_bo_default_swap_lru_tail,
 398 };
 399
 400 int qxl_ttm_init(struct qxl_device *qdev)
 401 {
 402         int r;
 403         int num_io_pages; /* != rom->num_io_pages, we include surface0 */
 404
 405         r = qxl_ttm_global_init(qdev);
 406         if (r)
 407                 return r;
 408         /* No others user of address space so set it to 0 */
 409         r = ttm_bo_device_init(&qdev->mman.bdev,
 410                                qdev->mman.bo_global_ref.ref.object,
 411                                &qxl_bo_driver,
 412                                qdev->ddev->anon_inode->i_mapping,
 413                                DRM_FILE_PAGE_OFFSET, 0);
 414         if (r) {
 415                 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
 416                 return r;
 417         }
 418         /* NOTE: this includes the framebuffer (aka surface 0) */
 419         num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE;
 420         r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_VRAM,
 421                            num_io_pages);
 422         if (r) {
 423                 DRM_ERROR("Failed initializing VRAM heap.\n");
 424                 return r;
 425         }
 426         r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_PRIV,
 427                            qdev->surfaceram_size / PAGE_SIZE);
 428         if (r) {
 429                 DRM_ERROR("Failed initializing Surfaces heap.\n");
 430                 return r;
 431         }
 432         DRM_INFO("qxl: %uM of VRAM memory size\n",
 433                  (unsigned)qdev->vram_size / (1024 * 1024));
 434         DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n",
 435                  ((unsigned)num_io_pages * PAGE_SIZE) / (1024 * 1024));
 436         DRM_INFO("qxl: %uM of Surface memory size\n",
 437                  (unsigned)qdev->surfaceram_size / (1024 * 1024));
 438         r = qxl_ttm_debugfs_init(qdev);
 439         if (r) {
 440                 DRM_ERROR("Failed to init debugfs\n");
 441                 return r;
 442         }
 443         return 0;
 444 }
 445
 446 void qxl_ttm_fini(struct qxl_device *qdev)
 447 {
 448         ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_VRAM);
 449         ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_PRIV);
 450         ttm_bo_device_release(&qdev->mman.bdev);
 451         qxl_ttm_global_fini(qdev);
 452         DRM_INFO("qxl: ttm finalized\n");
 453 }
 454
 455
 456 #define QXL_DEBUGFS_MEM_TYPES 2
 457
 458 #if defined(CONFIG_DEBUG_FS)
 459 static int qxl_mm_dump_table(struct seq_file *m, void *data)
 460 {
 461         struct drm_info_node *node = (struct drm_info_node *)m->private;
 462         struct drm_mm *mm = (struct drm_mm *)node->info_ent->data;
 463         struct drm_device *dev = node->minor->dev;
 464         struct qxl_device *rdev = dev->dev_private;
 465         int ret;
 466         struct ttm_bo_global *glob = rdev->mman.bdev.glob;
 467
 468         spin_lock(&glob->lru_lock);
 469         ret = drm_mm_dump_table(m, mm);
 470         spin_unlock(&glob->lru_lock);
 471         return ret;
 472 }
 473 #endif
 474
 475 static int qxl_ttm_debugfs_init(struct qxl_device *qdev)
 476 {
 477 #if defined(CONFIG_DEBUG_FS)
 478         static struct drm_info_list qxl_mem_types_list[QXL_DEBUGFS_MEM_TYPES];
 479         static char qxl_mem_types_names[QXL_DEBUGFS_MEM_TYPES][32];
 480         unsigned i;
 481
 482         for (i = 0; i < QXL_DEBUGFS_MEM_TYPES; i++) {
 483                 if (i == 0)
 484                         sprintf(qxl_mem_types_names[i], "qxl_mem_mm");
 485                 else
 486                         sprintf(qxl_mem_types_names[i], "qxl_surf_mm");
 487                 qxl_mem_types_list[i].name = qxl_mem_types_names[i];
 488                 qxl_mem_types_list[i].show = &qxl_mm_dump_table;
 489                 qxl_mem_types_list[i].driver_features = 0;
 490                 if (i == 0)
 491                         qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_VRAM].priv;
 492                 else
 493                         qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_PRIV].priv;
 494
 495         }
 496         return qxl_debugfs_add_files(qdev, qxl_mem_types_list, i);
 497 #else
 498         return 0;
 499 #endif
 500 }