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 <drm/ttm/ttm_bo_api.h>
  27 #include <drm/ttm/ttm_bo_driver.h>
  28 #include <drm/ttm/ttm_placement.h>
  29 #include <drm/ttm/ttm_page_alloc.h>
  30 #include <drm/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
  39 static struct qxl_device *qxl_get_qdev(struct ttm_bo_device *bdev)
  40 {
  41         struct qxl_mman *mman;
  42         struct qxl_device *qdev;
  43
  44         mman = container_of(bdev, struct qxl_mman, bdev);
  45         qdev = container_of(mman, struct qxl_device, mman);
  46         return qdev;
  47 }
  48
  49 static struct vm_operations_struct qxl_ttm_vm_ops;
  50 static const struct vm_operations_struct *ttm_vm_ops;
  51
  52 static vm_fault_t qxl_ttm_fault(struct vm_fault *vmf)
  53 {
  54         struct ttm_buffer_object *bo;
  55         vm_fault_t ret;
  56
  57         bo = (struct ttm_buffer_object *)vmf->vma->vm_private_data;
  58         if (bo == NULL)
  59                 return VM_FAULT_NOPAGE;
  60         ret = ttm_vm_ops->fault(vmf);
  61         return ret;
  62 }
  63
  64 int qxl_mmap(struct file *filp, struct vm_area_struct *vma)
  65 {
  66         int r;
  67         struct drm_file *file_priv = filp->private_data;
  68         struct qxl_device *qdev = file_priv->minor->dev->dev_private;
  69
  70         if (qdev == NULL) {
  71                 DRM_ERROR(
  72                  "filp->private_data->minor->dev->dev_private == NULL\n");
  73                 return -EINVAL;
  74         }
  75         DRM_DEBUG_DRIVER("filp->private_data = 0x%p, vma->vm_pgoff = %lx\n",
  76                   filp->private_data, vma->vm_pgoff);
  77
  78         r = ttm_bo_mmap(filp, vma, &qdev->mman.bdev);
  79         if (unlikely(r != 0))
  80                 return r;
  81         if (unlikely(ttm_vm_ops == NULL)) {
  82                 ttm_vm_ops = vma->vm_ops;
  83                 qxl_ttm_vm_ops = *ttm_vm_ops;
  84                 qxl_ttm_vm_ops.fault = &qxl_ttm_fault;
  85         }
  86         vma->vm_ops = &qxl_ttm_vm_ops;
  87         return 0;
  88 }
  89
  90 static int qxl_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
  91 {
  92         return 0;
  93 }
  94
  95 static int qxl_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
  96                              struct ttm_mem_type_manager *man)
  97 {
  98         struct qxl_device *qdev = qxl_get_qdev(bdev);
  99         unsigned int gpu_offset_shift =
 100                 64 - (qdev->rom->slot_gen_bits + qdev->rom->slot_id_bits + 8);
 101         struct qxl_memslot *slot;
 102
 103         switch (type) {
 104         case TTM_PL_SYSTEM:
 105                 /* System memory */
 106                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
 107                 man->available_caching = TTM_PL_MASK_CACHING;
 108                 man->default_caching = TTM_PL_FLAG_CACHED;
 109                 break;
 110         case TTM_PL_VRAM:
 111         case TTM_PL_PRIV:
 112                 /* "On-card" video ram */
 113                 slot = (type == TTM_PL_VRAM) ?
 114                         &qdev->main_slot : &qdev->surfaces_slot;
 115                 slot->gpu_offset = (uint64_t)type << gpu_offset_shift;
 116                 man->func = &ttm_bo_manager_func;
 117                 man->gpu_offset = slot->gpu_offset;
 118                 man->flags = TTM_MEMTYPE_FLAG_FIXED |
 119                              TTM_MEMTYPE_FLAG_MAPPABLE;
 120                 man->available_caching = TTM_PL_MASK_CACHING;
 121                 man->default_caching = TTM_PL_FLAG_CACHED;
 122                 break;
 123         default:
 124                 DRM_ERROR("Unsupported memory type %u\n", (unsigned int)type);
 125                 return -EINVAL;
 126         }
 127         return 0;
 128 }
 129
 130 static void qxl_evict_flags(struct ttm_buffer_object *bo,
 131                                 struct ttm_placement *placement)
 132 {
 133         struct qxl_bo *qbo;
 134         static const struct ttm_place placements = {
 135                 .fpfn = 0,
 136                 .lpfn = 0,
 137                 .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM
 138         };
 139
 140         if (!qxl_ttm_bo_is_qxl_bo(bo)) {
 141                 placement->placement = &placements;
 142                 placement->busy_placement = &placements;
 143                 placement->num_placement = 1;
 144                 placement->num_busy_placement = 1;
 145                 return;
 146         }
 147         qbo = to_qxl_bo(bo);
 148         qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU, false);
 149         *placement = qbo->placement;
 150 }
 151
 152 static int qxl_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 153 {
 154         struct qxl_bo *qbo = to_qxl_bo(bo);
 155
 156         return drm_vma_node_verify_access(&qbo->gem_base.vma_node,
 157                                           filp->private_data);
 158 }
 159
 160 static int qxl_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
 161                                   struct ttm_mem_reg *mem)
 162 {
 163         struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 164         struct qxl_device *qdev = qxl_get_qdev(bdev);
 165
 166         mem->bus.addr = NULL;
 167         mem->bus.offset = 0;
 168         mem->bus.size = mem->num_pages << PAGE_SHIFT;
 169         mem->bus.base = 0;
 170         mem->bus.is_iomem = false;
 171         if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
 172                 return -EINVAL;
 173         switch (mem->mem_type) {
 174         case TTM_PL_SYSTEM:
 175                 /* system memory */
 176                 return 0;
 177         case TTM_PL_VRAM:
 178                 mem->bus.is_iomem = true;
 179                 mem->bus.base = qdev->vram_base;
 180                 mem->bus.offset = mem->start << PAGE_SHIFT;
 181                 break;
 182         case TTM_PL_PRIV:
 183                 mem->bus.is_iomem = true;
 184                 mem->bus.base = qdev->surfaceram_base;
 185                 mem->bus.offset = mem->start << PAGE_SHIFT;
 186                 break;
 187         default:
 188                 return -EINVAL;
 189         }
 190         return 0;
 191 }
 192
 193 static void qxl_ttm_io_mem_free(struct ttm_bo_device *bdev,
 194                                 struct ttm_mem_reg *mem)
 195 {
 196 }
 197
 198 /*
 199  * TTM backend functions.
 200  */
 201 struct qxl_ttm_tt {
 202         struct ttm_tt                   ttm;
 203         struct qxl_device               *qdev;
 204         u64                             offset;
 205 };
 206
 207 static int qxl_ttm_backend_bind(struct ttm_tt *ttm,
 208                                 struct ttm_mem_reg *bo_mem)
 209 {
 210         struct qxl_ttm_tt *gtt = (void *)ttm;
 211
 212         gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
 213         if (!ttm->num_pages) {
 214                 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
 215                      ttm->num_pages, bo_mem, ttm);
 216         }
 217         /* Not implemented */
 218         return -1;
 219 }
 220
 221 static int qxl_ttm_backend_unbind(struct ttm_tt *ttm)
 222 {
 223         /* Not implemented */
 224         return -1;
 225 }
 226
 227 static void qxl_ttm_backend_destroy(struct ttm_tt *ttm)
 228 {
 229         struct qxl_ttm_tt *gtt = (void *)ttm;
 230
 231         ttm_tt_fini(&gtt->ttm);
 232         kfree(gtt);
 233 }
 234
 235 static struct ttm_backend_func qxl_backend_func = {
 236         .bind = &qxl_ttm_backend_bind,
 237         .unbind = &qxl_ttm_backend_unbind,
 238         .destroy = &qxl_ttm_backend_destroy,
 239 };
 240
 241 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_buffer_object *bo,
 242                                         uint32_t page_flags)
 243 {
 244         struct qxl_device *qdev;
 245         struct qxl_ttm_tt *gtt;
 246
 247         qdev = qxl_get_qdev(bo->bdev);
 248         gtt = kzalloc(sizeof(struct qxl_ttm_tt), GFP_KERNEL);
 249         if (gtt == NULL)
 250                 return NULL;
 251         gtt->ttm.func = &qxl_backend_func;
 252         gtt->qdev = qdev;
 253         if (ttm_tt_init(&gtt->ttm, bo, page_flags)) {
 254                 kfree(gtt);
 255                 return NULL;
 256         }
 257         return &gtt->ttm;
 258 }
 259
 260 static void qxl_move_null(struct ttm_buffer_object *bo,
 261                              struct ttm_mem_reg *new_mem)
 262 {
 263         struct ttm_mem_reg *old_mem = &bo->mem;
 264
 265         BUG_ON(old_mem->mm_node != NULL);
 266         *old_mem = *new_mem;
 267         new_mem->mm_node = NULL;
 268 }
 269
 270 static int qxl_bo_move(struct ttm_buffer_object *bo, bool evict,
 271                        struct ttm_operation_ctx *ctx,
 272                        struct ttm_mem_reg *new_mem)
 273 {
 274         struct ttm_mem_reg *old_mem = &bo->mem;
 275         int ret;
 276
 277         ret = ttm_bo_wait(bo, ctx->interruptible, ctx->no_wait_gpu);
 278         if (ret)
 279                 return ret;
 280
 281         if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
 282                 qxl_move_null(bo, new_mem);
 283                 return 0;
 284         }
 285         return ttm_bo_move_memcpy(bo, ctx, new_mem);
 286 }
 287
 288 static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
 289                                bool evict,
 290                                struct ttm_mem_reg *new_mem)
 291 {
 292         struct qxl_bo *qbo;
 293         struct qxl_device *qdev;
 294
 295         if (!qxl_ttm_bo_is_qxl_bo(bo))
 296                 return;
 297         qbo = to_qxl_bo(bo);
 298         qdev = qbo->gem_base.dev->dev_private;
 299
 300         if (bo->mem.mem_type == TTM_PL_PRIV && qbo->surface_id)
 301                 qxl_surface_evict(qdev, qbo, new_mem ? true : false);
 302 }
 303
 304 static struct ttm_bo_driver qxl_bo_driver = {
 305         .ttm_tt_create = &qxl_ttm_tt_create,
 306         .invalidate_caches = &qxl_invalidate_caches,
 307         .init_mem_type = &qxl_init_mem_type,
 308         .eviction_valuable = ttm_bo_eviction_valuable,
 309         .evict_flags = &qxl_evict_flags,
 310         .move = &qxl_bo_move,
 311         .verify_access = &qxl_verify_access,
 312         .io_mem_reserve = &qxl_ttm_io_mem_reserve,
 313         .io_mem_free = &qxl_ttm_io_mem_free,
 314         .move_notify = &qxl_bo_move_notify,
 315 };
 316
 317 int qxl_ttm_init(struct qxl_device *qdev)
 318 {
 319         int r;
 320         int num_io_pages; /* != rom->num_io_pages, we include surface0 */
 321
 322         /* No others user of address space so set it to 0 */
 323         r = ttm_bo_device_init(&qdev->mman.bdev,
 324                                &qxl_bo_driver,
 325                                qdev->ddev.anon_inode->i_mapping,
 326                                false);
 327         if (r) {
 328                 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
 329                 return r;
 330         }
 331         /* NOTE: this includes the framebuffer (aka surface 0) */
 332         num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE;
 333         r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_VRAM,
 334                            num_io_pages);
 335         if (r) {
 336                 DRM_ERROR("Failed initializing VRAM heap.\n");
 337                 return r;
 338         }
 339         r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_PRIV,
 340                            qdev->surfaceram_size / PAGE_SIZE);
 341         if (r) {
 342                 DRM_ERROR("Failed initializing Surfaces heap.\n");
 343                 return r;
 344         }
 345         DRM_INFO("qxl: %uM of VRAM memory size\n",
 346                  (unsigned int)qdev->vram_size / (1024 * 1024));
 347         DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n",
 348                  ((unsigned int)num_io_pages * PAGE_SIZE) / (1024 * 1024));
 349         DRM_INFO("qxl: %uM of Surface memory size\n",
 350                  (unsigned int)qdev->surfaceram_size / (1024 * 1024));
 351         return 0;
 352 }
 353
 354 void qxl_ttm_fini(struct qxl_device *qdev)
 355 {
 356         ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_VRAM);
 357         ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_PRIV);
 358         ttm_bo_device_release(&qdev->mman.bdev);
 359         DRM_INFO("qxl: ttm finalized\n");
 360 }
 361
 362 #define QXL_DEBUGFS_MEM_TYPES 2
 363
 364 #if defined(CONFIG_DEBUG_FS)
 365 static int qxl_mm_dump_table(struct seq_file *m, void *data)
 366 {
 367         struct drm_info_node *node = (struct drm_info_node *)m->private;
 368         struct drm_mm *mm = (struct drm_mm *)node->info_ent->data;
 369         struct drm_device *dev = node->minor->dev;
 370         struct qxl_device *rdev = dev->dev_private;
 371         struct ttm_bo_global *glob = rdev->mman.bdev.glob;
 372         struct drm_printer p = drm_seq_file_printer(m);
 373
 374         spin_lock(&glob->lru_lock);
 375         drm_mm_print(mm, &p);
 376         spin_unlock(&glob->lru_lock);
 377         return 0;
 378 }
 379 #endif
 380
 381 int qxl_ttm_debugfs_init(struct qxl_device *qdev)
 382 {
 383 #if defined(CONFIG_DEBUG_FS)
 384         static struct drm_info_list qxl_mem_types_list[QXL_DEBUGFS_MEM_TYPES];
 385         static char qxl_mem_types_names[QXL_DEBUGFS_MEM_TYPES][32];
 386         unsigned int i;
 387
 388         for (i = 0; i < QXL_DEBUGFS_MEM_TYPES; i++) {
 389                 if (i == 0)
 390                         sprintf(qxl_mem_types_names[i], "qxl_mem_mm");
 391                 else
 392                         sprintf(qxl_mem_types_names[i], "qxl_surf_mm");
 393                 qxl_mem_types_list[i].name = qxl_mem_types_names[i];
 394                 qxl_mem_types_list[i].show = &qxl_mm_dump_table;
 395                 qxl_mem_types_list[i].driver_features = 0;
 396                 if (i == 0)
 397                         qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_VRAM].priv;
 398                 else
 399                         qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_PRIV].priv;
 400
 401         }
 402         return qxl_debugfs_add_files(qdev, qxl_mem_types_list, i);
 403 #else
 404         return 0;
 405 #endif
 406 }