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