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 <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 struct vm_operations_struct qxl_ttm_vm_ops;
  52 static const struct vm_operations_struct *ttm_vm_ops;
  53
  54 static vm_fault_t qxl_ttm_fault(struct vm_fault *vmf)
  55 {
  56         struct ttm_buffer_object *bo;
  57         vm_fault_t ret;
  58
  59         bo = (struct ttm_buffer_object *)vmf->vma->vm_private_data;
  60         if (bo == NULL)
  61                 return VM_FAULT_NOPAGE;
  62         ret = ttm_vm_ops->fault(vmf);
  63         return ret;
  64 }
  65
  66 int qxl_mmap(struct file *filp, struct vm_area_struct *vma)
  67 {
  68         int r;
  69         struct drm_file *file_priv = filp->private_data;
  70         struct qxl_device *qdev = file_priv->minor->dev->dev_private;
  71
  72         if (qdev == NULL) {
  73                 DRM_ERROR(
  74                  "filp->private_data->minor->dev->dev_private == NULL\n");
  75                 return -EINVAL;
  76         }
  77         DRM_DEBUG_DRIVER("filp->private_data = 0x%p, vma->vm_pgoff = %lx\n",
  78                   filp->private_data, vma->vm_pgoff);
  79
  80         r = ttm_bo_mmap(filp, vma, &qdev->mman.bdev);
  81         if (unlikely(r != 0))
  82                 return r;
  83         if (unlikely(ttm_vm_ops == NULL)) {
  84                 ttm_vm_ops = vma->vm_ops;
  85                 qxl_ttm_vm_ops = *ttm_vm_ops;
  86                 qxl_ttm_vm_ops.fault = &qxl_ttm_fault;
  87         }
  88         vma->vm_ops = &qxl_ttm_vm_ops;
  89         return 0;
  90 }
  91
  92 static int qxl_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
  93 {
  94         return 0;
  95 }
  96
  97 static int qxl_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
  98                              struct ttm_mem_type_manager *man)
  99 {
 100         struct qxl_device *qdev = qxl_get_qdev(bdev);
 101         unsigned int gpu_offset_shift =
 102                 64 - (qdev->rom->slot_gen_bits + qdev->rom->slot_id_bits + 8);
 103         struct qxl_memslot *slot;
 104
 105         switch (type) {
 106         case TTM_PL_SYSTEM:
 107                 /* System memory */
 108                 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
 109                 man->available_caching = TTM_PL_MASK_CACHING;
 110                 man->default_caching = TTM_PL_FLAG_CACHED;
 111                 break;
 112         case TTM_PL_VRAM:
 113         case TTM_PL_PRIV:
 114                 /* "On-card" video ram */
 115                 slot = (type == TTM_PL_VRAM) ?
 116                         &qdev->main_slot : &qdev->surfaces_slot;
 117                 slot->gpu_offset = (uint64_t)type << gpu_offset_shift;
 118                 man->func = &ttm_bo_manager_func;
 119                 man->gpu_offset = slot->gpu_offset;
 120                 man->flags = TTM_MEMTYPE_FLAG_FIXED |
 121                              TTM_MEMTYPE_FLAG_MAPPABLE;
 122                 man->available_caching = TTM_PL_MASK_CACHING;
 123                 man->default_caching = TTM_PL_FLAG_CACHED;
 124                 break;
 125         default:
 126                 DRM_ERROR("Unsupported memory type %u\n", (unsigned int)type);
 127                 return -EINVAL;
 128         }
 129         return 0;
 130 }
 131
 132 static void qxl_evict_flags(struct ttm_buffer_object *bo,
 133                                 struct ttm_placement *placement)
 134 {
 135         struct qxl_bo *qbo;
 136         static const struct ttm_place placements = {
 137                 .fpfn = 0,
 138                 .lpfn = 0,
 139                 .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM
 140         };
 141
 142         if (!qxl_ttm_bo_is_qxl_bo(bo)) {
 143                 placement->placement = &placements;
 144                 placement->busy_placement = &placements;
 145                 placement->num_placement = 1;
 146                 placement->num_busy_placement = 1;
 147                 return;
 148         }
 149         qbo = to_qxl_bo(bo);
 150         qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU, false);
 151         *placement = qbo->placement;
 152 }
 153
 154 static int qxl_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 155 {
 156         struct qxl_bo *qbo = to_qxl_bo(bo);
 157
 158         return drm_vma_node_verify_access(&qbo->tbo.base.vma_node,
 159                                           filp->private_data);
 160 }
 161
 162 static int qxl_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
 163                                   struct ttm_mem_reg *mem)
 164 {
 165         struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 166         struct qxl_device *qdev = qxl_get_qdev(bdev);
 167
 168         mem->bus.addr = NULL;
 169         mem->bus.offset = 0;
 170         mem->bus.size = mem->num_pages << PAGE_SHIFT;
 171         mem->bus.base = 0;
 172         mem->bus.is_iomem = false;
 173         if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
 174                 return -EINVAL;
 175         switch (mem->mem_type) {
 176         case TTM_PL_SYSTEM:
 177                 /* system memory */
 178                 return 0;
 179         case TTM_PL_VRAM:
 180                 mem->bus.is_iomem = true;
 181                 mem->bus.base = qdev->vram_base;
 182                 mem->bus.offset = mem->start << PAGE_SHIFT;
 183                 break;
 184         case TTM_PL_PRIV:
 185                 mem->bus.is_iomem = true;
 186                 mem->bus.base = qdev->surfaceram_base;
 187                 mem->bus.offset = mem->start << PAGE_SHIFT;
 188                 break;
 189         default:
 190                 return -EINVAL;
 191         }
 192         return 0;
 193 }
 194
 195 static void qxl_ttm_io_mem_free(struct ttm_bo_device *bdev,
 196                                 struct ttm_mem_reg *mem)
 197 {
 198 }
 199
 200 /*
 201  * TTM backend functions.
 202  */
 203 struct qxl_ttm_tt {
 204         struct ttm_tt                   ttm;
 205         struct qxl_device               *qdev;
 206         u64                             offset;
 207 };
 208
 209 static int qxl_ttm_backend_bind(struct ttm_tt *ttm,
 210                                 struct ttm_mem_reg *bo_mem)
 211 {
 212         struct qxl_ttm_tt *gtt = (void *)ttm;
 213
 214         gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
 215         if (!ttm->num_pages) {
 216                 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
 217                      ttm->num_pages, bo_mem, ttm);
 218         }
 219         /* Not implemented */
 220         return -1;
 221 }
 222
 223 static int qxl_ttm_backend_unbind(struct ttm_tt *ttm)
 224 {
 225         /* Not implemented */
 226         return -1;
 227 }
 228
 229 static void qxl_ttm_backend_destroy(struct ttm_tt *ttm)
 230 {
 231         struct qxl_ttm_tt *gtt = (void *)ttm;
 232
 233         ttm_tt_fini(&gtt->ttm);
 234         kfree(gtt);
 235 }
 236
 237 static struct ttm_backend_func qxl_backend_func = {
 238         .bind = &qxl_ttm_backend_bind,
 239         .unbind = &qxl_ttm_backend_unbind,
 240         .destroy = &qxl_ttm_backend_destroy,
 241 };
 242
 243 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_buffer_object *bo,
 244                                         uint32_t page_flags)
 245 {
 246         struct qxl_device *qdev;
 247         struct qxl_ttm_tt *gtt;
 248
 249         qdev = qxl_get_qdev(bo->bdev);
 250         gtt = kzalloc(sizeof(struct qxl_ttm_tt), GFP_KERNEL);
 251         if (gtt == NULL)
 252                 return NULL;
 253         gtt->ttm.func = &qxl_backend_func;
 254         gtt->qdev = qdev;
 255         if (ttm_tt_init(&gtt->ttm, bo, page_flags)) {
 256                 kfree(gtt);
 257                 return NULL;
 258         }
 259         return &gtt->ttm;
 260 }
 261
 262 static void qxl_move_null(struct ttm_buffer_object *bo,
 263                              struct ttm_mem_reg *new_mem)
 264 {
 265         struct ttm_mem_reg *old_mem = &bo->mem;
 266
 267         BUG_ON(old_mem->mm_node != NULL);
 268         *old_mem = *new_mem;
 269         new_mem->mm_node = NULL;
 270 }
 271
 272 static int qxl_bo_move(struct ttm_buffer_object *bo, bool evict,
 273                        struct ttm_operation_ctx *ctx,
 274                        struct ttm_mem_reg *new_mem)
 275 {
 276         struct ttm_mem_reg *old_mem = &bo->mem;
 277         int ret;
 278
 279         ret = ttm_bo_wait(bo, ctx->interruptible, ctx->no_wait_gpu);
 280         if (ret)
 281                 return ret;
 282
 283         if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
 284                 qxl_move_null(bo, new_mem);
 285                 return 0;
 286         }
 287         return ttm_bo_move_memcpy(bo, ctx, new_mem);
 288 }
 289
 290 static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
 291                                bool evict,
 292                                struct ttm_mem_reg *new_mem)
 293 {
 294         struct qxl_bo *qbo;
 295         struct qxl_device *qdev;
 296
 297         if (!qxl_ttm_bo_is_qxl_bo(bo))
 298                 return;
 299         qbo = to_qxl_bo(bo);
 300         qdev = qbo->tbo.base.dev->dev_private;
 301
 302         if (bo->mem.mem_type == TTM_PL_PRIV && qbo->surface_id)
 303                 qxl_surface_evict(qdev, qbo, new_mem ? true : false);
 304 }
 305
 306 static struct ttm_bo_driver qxl_bo_driver = {
 307         .ttm_tt_create = &qxl_ttm_tt_create,
 308         .invalidate_caches = &qxl_invalidate_caches,
 309         .init_mem_type = &qxl_init_mem_type,
 310         .eviction_valuable = ttm_bo_eviction_valuable,
 311         .evict_flags = &qxl_evict_flags,
 312         .move = &qxl_bo_move,
 313         .verify_access = &qxl_verify_access,
 314         .io_mem_reserve = &qxl_ttm_io_mem_reserve,
 315         .io_mem_free = &qxl_ttm_io_mem_free,
 316         .move_notify = &qxl_bo_move_notify,
 317 };
 318
 319 int qxl_ttm_init(struct qxl_device *qdev)
 320 {
 321         int r;
 322         int num_io_pages; /* != rom->num_io_pages, we include surface0 */
 323
 324         /* No others user of address space so set it to 0 */
 325         r = ttm_bo_device_init(&qdev->mman.bdev,
 326                                &qxl_bo_driver,
 327                                qdev->ddev.anon_inode->i_mapping,
 328                                false);
 329         if (r) {
 330                 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
 331                 return r;
 332         }
 333         /* NOTE: this includes the framebuffer (aka surface 0) */
 334         num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE;
 335         r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_VRAM,
 336                            num_io_pages);
 337         if (r) {
 338                 DRM_ERROR("Failed initializing VRAM heap.\n");
 339                 return r;
 340         }
 341         r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_PRIV,
 342                            qdev->surfaceram_size / PAGE_SIZE);
 343         if (r) {
 344                 DRM_ERROR("Failed initializing Surfaces heap.\n");
 345                 return r;
 346         }
 347         DRM_INFO("qxl: %uM of VRAM memory size\n",
 348                  (unsigned int)qdev->vram_size / (1024 * 1024));
 349         DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n",
 350                  ((unsigned int)num_io_pages * PAGE_SIZE) / (1024 * 1024));
 351         DRM_INFO("qxl: %uM of Surface memory size\n",
 352                  (unsigned int)qdev->surfaceram_size / (1024 * 1024));
 353         return 0;
 354 }
 355
 356 void qxl_ttm_fini(struct qxl_device *qdev)
 357 {
 358         ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_VRAM);
 359         ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_PRIV);
 360         ttm_bo_device_release(&qdev->mman.bdev);
 361         DRM_INFO("qxl: ttm finalized\n");
 362 }
 363
 364 #define QXL_DEBUGFS_MEM_TYPES 2
 365
 366 #if defined(CONFIG_DEBUG_FS)
 367 static int qxl_mm_dump_table(struct seq_file *m, void *data)
 368 {
 369         struct drm_info_node *node = (struct drm_info_node *)m->private;
 370         struct drm_mm *mm = (struct drm_mm *)node->info_ent->data;
 371         struct drm_device *dev = node->minor->dev;
 372         struct qxl_device *rdev = dev->dev_private;
 373         struct ttm_bo_global *glob = rdev->mman.bdev.glob;
 374         struct drm_printer p = drm_seq_file_printer(m);
 375
 376         spin_lock(&glob->lru_lock);
 377         drm_mm_print(mm, &p);
 378         spin_unlock(&glob->lru_lock);
 379         return 0;
 380 }
 381 #endif
 382
 383 int qxl_ttm_debugfs_init(struct qxl_device *qdev)
 384 {
 385 #if defined(CONFIG_DEBUG_FS)
 386         static struct drm_info_list qxl_mem_types_list[QXL_DEBUGFS_MEM_TYPES];
 387         static char qxl_mem_types_names[QXL_DEBUGFS_MEM_TYPES][32];
 388         unsigned int i;
 389
 390         for (i = 0; i < QXL_DEBUGFS_MEM_TYPES; i++) {
 391                 if (i == 0)
 392                         sprintf(qxl_mem_types_names[i], "qxl_mem_mm");
 393                 else
 394                         sprintf(qxl_mem_types_names[i], "qxl_surf_mm");
 395                 qxl_mem_types_list[i].name = qxl_mem_types_names[i];
 396                 qxl_mem_types_list[i].show = &qxl_mm_dump_table;
 397                 qxl_mem_types_list[i].driver_features = 0;
 398                 if (i == 0)
 399                         qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_VRAM].priv;
 400                 else
 401                         qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_PRIV].priv;
 402
 403         }
 404         return qxl_debugfs_add_files(qdev, qxl_mem_types_list, i);
 405 #else
 406         return 0;
 407 #endif
 408 }