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         struct drm_file *file_priv;
  67         struct qxl_device *qdev;
  68         int r;
  69
  70         if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
  71                 return -EINVAL;
  72
  73         file_priv = filp->private_data;
  74         qdev = file_priv->minor->dev->dev_private;
  75         if (qdev == NULL) {
  76                 DRM_ERROR(
  77                  "filp->private_data->minor->dev->dev_private == NULL\n");
  78                 return -EINVAL;
  79         }
  80         DRM_DEBUG_DRIVER("filp->private_data = 0x%p, vma->vm_pgoff = %lx\n",
  81                   filp->private_data, vma->vm_pgoff);
  82
  83         r = ttm_bo_mmap(filp, vma, &qdev->mman.bdev);
  84         if (unlikely(r != 0))
  85                 return r;
  86         if (unlikely(ttm_vm_ops == NULL)) {
  87                 ttm_vm_ops = vma->vm_ops;
  88                 qxl_ttm_vm_ops = *ttm_vm_ops;
  89                 qxl_ttm_vm_ops.fault = &qxl_ttm_fault;
  90         }
  91         vma->vm_ops = &qxl_ttm_vm_ops;
  92         return 0;
  93 }
  94
  95 static int qxl_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
  96 {
  97         return 0;
  98 }
  99
 100 static int qxl_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 101                              struct ttm_mem_type_manager *man)
 102 {
 103         struct qxl_device *qdev = qxl_get_qdev(bdev);
 104         unsigned int gpu_offset_shift =
 105                 64 - (qdev->rom->slot_gen_bits + qdev->rom->slot_id_bits + 8);
 106         struct qxl_memslot *slot;
 107
 108         switch (type) {
 109         case TTM_PL_SYSTEM:
 110                 /* System memory */
 111                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
 112                 man->available_caching = TTM_PL_MASK_CACHING;
 113                 man->default_caching = TTM_PL_FLAG_CACHED;
 114                 break;
 115         case TTM_PL_VRAM:
 116         case TTM_PL_PRIV:
 117                 /* "On-card" video ram */
 118                 slot = (type == TTM_PL_VRAM) ?
 119                         &qdev->main_slot : &qdev->surfaces_slot;
 120                 slot->gpu_offset = (uint64_t)type << gpu_offset_shift;
 121                 man->func = &ttm_bo_manager_func;
 122                 man->gpu_offset = slot->gpu_offset;
 123                 man->flags = TTM_MEMTYPE_FLAG_FIXED |
 124                              TTM_MEMTYPE_FLAG_MAPPABLE;
 125                 man->available_caching = TTM_PL_MASK_CACHING;
 126                 man->default_caching = TTM_PL_FLAG_CACHED;
 127                 break;
 128         default:
 129                 DRM_ERROR("Unsupported memory type %u\n", (unsigned int)type);
 130                 return -EINVAL;
 131         }
 132         return 0;
 133 }
 134
 135 static void qxl_evict_flags(struct ttm_buffer_object *bo,
 136                                 struct ttm_placement *placement)
 137 {
 138         struct qxl_bo *qbo;
 139         static const struct ttm_place placements = {
 140                 .fpfn = 0,
 141                 .lpfn = 0,
 142                 .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM
 143         };
 144
 145         if (!qxl_ttm_bo_is_qxl_bo(bo)) {
 146                 placement->placement = &placements;
 147                 placement->busy_placement = &placements;
 148                 placement->num_placement = 1;
 149                 placement->num_busy_placement = 1;
 150                 return;
 151         }
 152         qbo = to_qxl_bo(bo);
 153         qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU, false);
 154         *placement = qbo->placement;
 155 }
 156
 157 static int qxl_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 158 {
 159         struct qxl_bo *qbo = to_qxl_bo(bo);
 160
 161         return drm_vma_node_verify_access(&qbo->gem_base.vma_node,
 162                                           filp->private_data);
 163 }
 164
 165 static int qxl_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
 166                                   struct ttm_mem_reg *mem)
 167 {
 168         struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 169         struct qxl_device *qdev = qxl_get_qdev(bdev);
 170
 171         mem->bus.addr = NULL;
 172         mem->bus.offset = 0;
 173         mem->bus.size = mem->num_pages << PAGE_SHIFT;
 174         mem->bus.base = 0;
 175         mem->bus.is_iomem = false;
 176         if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
 177                 return -EINVAL;
 178         switch (mem->mem_type) {
 179         case TTM_PL_SYSTEM:
 180                 /* system memory */
 181                 return 0;
 182         case TTM_PL_VRAM:
 183                 mem->bus.is_iomem = true;
 184                 mem->bus.base = qdev->vram_base;
 185                 mem->bus.offset = mem->start << PAGE_SHIFT;
 186                 break;
 187         case TTM_PL_PRIV:
 188                 mem->bus.is_iomem = true;
 189                 mem->bus.base = qdev->surfaceram_base;
 190                 mem->bus.offset = mem->start << PAGE_SHIFT;
 191                 break;
 192         default:
 193                 return -EINVAL;
 194         }
 195         return 0;
 196 }
 197
 198 static void qxl_ttm_io_mem_free(struct ttm_bo_device *bdev,
 199                                 struct ttm_mem_reg *mem)
 200 {
 201 }
 202
 203 /*
 204  * TTM backend functions.
 205  */
 206 struct qxl_ttm_tt {
 207         struct ttm_tt                   ttm;
 208         struct qxl_device               *qdev;
 209         u64                             offset;
 210 };
 211
 212 static int qxl_ttm_backend_bind(struct ttm_tt *ttm,
 213                                 struct ttm_mem_reg *bo_mem)
 214 {
 215         struct qxl_ttm_tt *gtt = (void *)ttm;
 216
 217         gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
 218         if (!ttm->num_pages) {
 219                 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
 220                      ttm->num_pages, bo_mem, ttm);
 221         }
 222         /* Not implemented */
 223         return -1;
 224 }
 225
 226 static int qxl_ttm_backend_unbind(struct ttm_tt *ttm)
 227 {
 228         /* Not implemented */
 229         return -1;
 230 }
 231
 232 static void qxl_ttm_backend_destroy(struct ttm_tt *ttm)
 233 {
 234         struct qxl_ttm_tt *gtt = (void *)ttm;
 235
 236         ttm_tt_fini(&gtt->ttm);
 237         kfree(gtt);
 238 }
 239
 240 static struct ttm_backend_func qxl_backend_func = {
 241         .bind = &qxl_ttm_backend_bind,
 242         .unbind = &qxl_ttm_backend_unbind,
 243         .destroy = &qxl_ttm_backend_destroy,
 244 };
 245
 246 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_buffer_object *bo,
 247                                         uint32_t page_flags)
 248 {
 249         struct qxl_device *qdev;
 250         struct qxl_ttm_tt *gtt;
 251
 252         qdev = qxl_get_qdev(bo->bdev);
 253         gtt = kzalloc(sizeof(struct qxl_ttm_tt), GFP_KERNEL);
 254         if (gtt == NULL)
 255                 return NULL;
 256         gtt->ttm.func = &qxl_backend_func;
 257         gtt->qdev = qdev;
 258         if (ttm_tt_init(&gtt->ttm, bo, page_flags)) {
 259                 kfree(gtt);
 260                 return NULL;
 261         }
 262         return &gtt->ttm;
 263 }
 264
 265 static void qxl_move_null(struct ttm_buffer_object *bo,
 266                              struct ttm_mem_reg *new_mem)
 267 {
 268         struct ttm_mem_reg *old_mem = &bo->mem;
 269
 270         BUG_ON(old_mem->mm_node != NULL);
 271         *old_mem = *new_mem;
 272         new_mem->mm_node = NULL;
 273 }
 274
 275 static int qxl_bo_move(struct ttm_buffer_object *bo, bool evict,
 276                        struct ttm_operation_ctx *ctx,
 277                        struct ttm_mem_reg *new_mem)
 278 {
 279         struct ttm_mem_reg *old_mem = &bo->mem;
 280         int ret;
 281
 282         ret = ttm_bo_wait(bo, ctx->interruptible, ctx->no_wait_gpu);
 283         if (ret)
 284                 return ret;
 285
 286         if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
 287                 qxl_move_null(bo, new_mem);
 288                 return 0;
 289         }
 290         return ttm_bo_move_memcpy(bo, ctx, new_mem);
 291 }
 292
 293 static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
 294                                bool evict,
 295                                struct ttm_mem_reg *new_mem)
 296 {
 297         struct qxl_bo *qbo;
 298         struct qxl_device *qdev;
 299
 300         if (!qxl_ttm_bo_is_qxl_bo(bo))
 301                 return;
 302         qbo = to_qxl_bo(bo);
 303         qdev = qbo->gem_base.dev->dev_private;
 304
 305         if (bo->mem.mem_type == TTM_PL_PRIV && qbo->surface_id)
 306                 qxl_surface_evict(qdev, qbo, new_mem ? true : false);
 307 }
 308
 309 static struct ttm_bo_driver qxl_bo_driver = {
 310         .ttm_tt_create = &qxl_ttm_tt_create,
 311         .invalidate_caches = &qxl_invalidate_caches,
 312         .init_mem_type = &qxl_init_mem_type,
 313         .eviction_valuable = ttm_bo_eviction_valuable,
 314         .evict_flags = &qxl_evict_flags,
 315         .move = &qxl_bo_move,
 316         .verify_access = &qxl_verify_access,
 317         .io_mem_reserve = &qxl_ttm_io_mem_reserve,
 318         .io_mem_free = &qxl_ttm_io_mem_free,
 319         .move_notify = &qxl_bo_move_notify,
 320 };
 321
 322 int qxl_ttm_init(struct qxl_device *qdev)
 323 {
 324         int r;
 325         int num_io_pages; /* != rom->num_io_pages, we include surface0 */
 326
 327         /* No others user of address space so set it to 0 */
 328         r = ttm_bo_device_init(&qdev->mman.bdev,
 329                                &qxl_bo_driver,
 330                                qdev->ddev.anon_inode->i_mapping,
 331                                DRM_FILE_PAGE_OFFSET, 0);
 332         if (r) {
 333                 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
 334                 return r;
 335         }
 336         /* NOTE: this includes the framebuffer (aka surface 0) */
 337         num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE;
 338         r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_VRAM,
 339                            num_io_pages);
 340         if (r) {
 341                 DRM_ERROR("Failed initializing VRAM heap.\n");
 342                 return r;
 343         }
 344         r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_PRIV,
 345                            qdev->surfaceram_size / PAGE_SIZE);
 346         if (r) {
 347                 DRM_ERROR("Failed initializing Surfaces heap.\n");
 348                 return r;
 349         }
 350         DRM_INFO("qxl: %uM of VRAM memory size\n",
 351                  (unsigned int)qdev->vram_size / (1024 * 1024));
 352         DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n",
 353                  ((unsigned int)num_io_pages * PAGE_SIZE) / (1024 * 1024));
 354         DRM_INFO("qxl: %uM of Surface memory size\n",
 355                  (unsigned int)qdev->surfaceram_size / (1024 * 1024));
 356         return 0;
 357 }
 358
 359 void qxl_ttm_fini(struct qxl_device *qdev)
 360 {
 361         ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_VRAM);
 362         ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_PRIV);
 363         ttm_bo_device_release(&qdev->mman.bdev);
 364         DRM_INFO("qxl: ttm finalized\n");
 365 }
 366
 367 #define QXL_DEBUGFS_MEM_TYPES 2
 368
 369 #if defined(CONFIG_DEBUG_FS)
 370 static int qxl_mm_dump_table(struct seq_file *m, void *data)
 371 {
 372         struct drm_info_node *node = (struct drm_info_node *)m->private;
 373         struct drm_mm *mm = (struct drm_mm *)node->info_ent->data;
 374         struct drm_device *dev = node->minor->dev;
 375         struct qxl_device *rdev = dev->dev_private;
 376         struct ttm_bo_global *glob = rdev->mman.bdev.glob;
 377         struct drm_printer p = drm_seq_file_printer(m);
 378
 379         spin_lock(&glob->lru_lock);
 380         drm_mm_print(mm, &p);
 381         spin_unlock(&glob->lru_lock);
 382         return 0;
 383 }
 384 #endif
 385
 386 int qxl_ttm_debugfs_init(struct qxl_device *qdev)
 387 {
 388 #if defined(CONFIG_DEBUG_FS)
 389         static struct drm_info_list qxl_mem_types_list[QXL_DEBUGFS_MEM_TYPES];
 390         static char qxl_mem_types_names[QXL_DEBUGFS_MEM_TYPES][32];
 391         unsigned int i;
 392
 393         for (i = 0; i < QXL_DEBUGFS_MEM_TYPES; i++) {
 394                 if (i == 0)
 395                         sprintf(qxl_mem_types_names[i], "qxl_mem_mm");
 396                 else
 397                         sprintf(qxl_mem_types_names[i], "qxl_surf_mm");
 398                 qxl_mem_types_list[i].name = qxl_mem_types_names[i];
 399                 qxl_mem_types_list[i].show = &qxl_mm_dump_table;
 400                 qxl_mem_types_list[i].driver_features = 0;
 401                 if (i == 0)
 402                         qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_VRAM].priv;
 403                 else
 404                         qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_PRIV].priv;
 405
 406         }
 407         return qxl_debugfs_add_files(qdev, qxl_mem_types_list, i);
 408 #else
 409         return 0;
 410 #endif
 411 }