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