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 void qxl_evict_flags(struct ttm_buffer_object *bo,
  52                                 struct ttm_placement *placement)
  53 {
  54         struct qxl_bo *qbo;
  55         static const struct ttm_place placements = {
  56                 .fpfn = 0,
  57                 .lpfn = 0,
  58                 .mem_type = TTM_PL_SYSTEM,
  59                 .flags = TTM_PL_MASK_CACHING
  60         };
  61
  62         if (!qxl_ttm_bo_is_qxl_bo(bo)) {
  63                 placement->placement = &placements;
  64                 placement->busy_placement = &placements;
  65                 placement->num_placement = 1;
  66                 placement->num_busy_placement = 1;
  67                 return;
  68         }
  69         qbo = to_qxl_bo(bo);
  70         qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU, false);
  71         *placement = qbo->placement;
  72 }
  73
  74 int qxl_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
  75                            struct ttm_resource *mem)
  76 {
  77         struct qxl_device *qdev = qxl_get_qdev(bdev);
  78
  79         switch (mem->mem_type) {
  80         case TTM_PL_SYSTEM:
  81                 /* system memory */
  82                 return 0;
  83         case TTM_PL_VRAM:
  84                 mem->bus.is_iomem = true;
  85                 mem->bus.offset = (mem->start << PAGE_SHIFT) + qdev->vram_base;
  86                 break;
  87         case TTM_PL_PRIV:
  88                 mem->bus.is_iomem = true;
  89                 mem->bus.offset = (mem->start << PAGE_SHIFT) +
  90                         qdev->surfaceram_base;
  91                 break;
  92         default:
  93                 return -EINVAL;
  94         }
  95         return 0;
  96 }
  97
  98 /*
  99  * TTM backend functions.
 100  */
 101 struct qxl_ttm_tt {
 102         struct ttm_tt                   ttm;
 103         struct qxl_device               *qdev;
 104         u64                             offset;
 105 };
 106
 107 static int qxl_ttm_backend_bind(struct ttm_bo_device *bdev,
 108                                 struct ttm_tt *ttm,
 109                                 struct ttm_resource *bo_mem)
 110 {
 111         struct qxl_ttm_tt *gtt = (void *)ttm;
 112
 113         gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
 114         if (!ttm->num_pages) {
 115                 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
 116                      ttm->num_pages, bo_mem, ttm);
 117         }
 118         /* Not implemented */
 119         return -1;
 120 }
 121
 122 static void qxl_ttm_backend_unbind(struct ttm_bo_device *bdev,
 123                                    struct ttm_tt *ttm)
 124 {
 125         /* Not implemented */
 126 }
 127
 128 static void qxl_ttm_backend_destroy(struct ttm_bo_device *bdev,
 129                                     struct ttm_tt *ttm)
 130 {
 131         struct qxl_ttm_tt *gtt = (void *)ttm;
 132
 133         ttm_tt_destroy_common(bdev, ttm);
 134         ttm_tt_fini(&gtt->ttm);
 135         kfree(gtt);
 136 }
 137
 138 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_buffer_object *bo,
 139                                         uint32_t page_flags)
 140 {
 141         struct qxl_device *qdev;
 142         struct qxl_ttm_tt *gtt;
 143
 144         qdev = qxl_get_qdev(bo->bdev);
 145         gtt = kzalloc(sizeof(struct qxl_ttm_tt), GFP_KERNEL);
 146         if (gtt == NULL)
 147                 return NULL;
 148         gtt->qdev = qdev;
 149         if (ttm_tt_init(&gtt->ttm, bo, page_flags)) {
 150                 kfree(gtt);
 151                 return NULL;
 152         }
 153         return &gtt->ttm;
 154 }
 155
 156 static int qxl_bo_move(struct ttm_buffer_object *bo, bool evict,
 157                        struct ttm_operation_ctx *ctx,
 158                        struct ttm_resource *new_mem)
 159 {
 160         struct ttm_resource *old_mem = &bo->mem;
 161         int ret;
 162
 163         ret = ttm_bo_wait(bo, ctx->interruptible, ctx->no_wait_gpu);
 164         if (ret)
 165                 return ret;
 166
 167         if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
 168                 ttm_bo_move_null(bo, new_mem);
 169                 return 0;
 170         }
 171         return ttm_bo_move_memcpy(bo, ctx, new_mem);
 172 }
 173
 174 static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
 175                                bool evict,
 176                                struct ttm_resource *new_mem)
 177 {
 178         struct qxl_bo *qbo;
 179         struct qxl_device *qdev;
 180
 181         if (!qxl_ttm_bo_is_qxl_bo(bo))
 182                 return;
 183         qbo = to_qxl_bo(bo);
 184         qdev = to_qxl(qbo->tbo.base.dev);
 185
 186         if (bo->mem.mem_type == TTM_PL_PRIV && qbo->surface_id)
 187                 qxl_surface_evict(qdev, qbo, new_mem ? true : false);
 188 }
 189
 190 static struct ttm_bo_driver qxl_bo_driver = {
 191         .ttm_tt_create = &qxl_ttm_tt_create,
 192         .ttm_tt_bind = &qxl_ttm_backend_bind,
 193         .ttm_tt_destroy = &qxl_ttm_backend_destroy,
 194         .ttm_tt_unbind = &qxl_ttm_backend_unbind,
 195         .eviction_valuable = ttm_bo_eviction_valuable,
 196         .evict_flags = &qxl_evict_flags,
 197         .move = &qxl_bo_move,
 198         .io_mem_reserve = &qxl_ttm_io_mem_reserve,
 199         .move_notify = &qxl_bo_move_notify,
 200 };
 201
 202 static int qxl_ttm_init_mem_type(struct qxl_device *qdev,
 203                                  unsigned int type,
 204                                  uint64_t size)
 205 {
 206         return ttm_range_man_init(&qdev->mman.bdev, type, false, size);
 207 }
 208
 209 int qxl_ttm_init(struct qxl_device *qdev)
 210 {
 211         int r;
 212         int num_io_pages; /* != rom->num_io_pages, we include surface0 */
 213
 214         /* No others user of address space so set it to 0 */
 215         r = ttm_bo_device_init(&qdev->mman.bdev,
 216                                &qxl_bo_driver,
 217                                qdev->ddev.anon_inode->i_mapping,
 218                                qdev->ddev.vma_offset_manager,
 219                                false);
 220         if (r) {
 221                 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
 222                 return r;
 223         }
 224         /* NOTE: this includes the framebuffer (aka surface 0) */
 225         num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE;
 226         r = qxl_ttm_init_mem_type(qdev, TTM_PL_VRAM, num_io_pages);
 227         if (r) {
 228                 DRM_ERROR("Failed initializing VRAM heap.\n");
 229                 return r;
 230         }
 231         r = qxl_ttm_init_mem_type(qdev, TTM_PL_PRIV,
 232                                   qdev->surfaceram_size / PAGE_SIZE);
 233         if (r) {
 234                 DRM_ERROR("Failed initializing Surfaces heap.\n");
 235                 return r;
 236         }
 237         DRM_INFO("qxl: %uM of VRAM memory size\n",
 238                  (unsigned int)qdev->vram_size / (1024 * 1024));
 239         DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n",
 240                  ((unsigned int)num_io_pages * PAGE_SIZE) / (1024 * 1024));
 241         DRM_INFO("qxl: %uM of Surface memory size\n",
 242                  (unsigned int)qdev->surfaceram_size / (1024 * 1024));
 243         return 0;
 244 }
 245
 246 void qxl_ttm_fini(struct qxl_device *qdev)
 247 {
 248         ttm_range_man_fini(&qdev->mman.bdev, TTM_PL_VRAM);
 249         ttm_range_man_fini(&qdev->mman.bdev, TTM_PL_PRIV);
 250         ttm_bo_device_release(&qdev->mman.bdev);
 251         DRM_INFO("qxl: ttm finalized\n");
 252 }
 253
 254 #define QXL_DEBUGFS_MEM_TYPES 2
 255
 256 #if defined(CONFIG_DEBUG_FS)
 257 static int qxl_mm_dump_table(struct seq_file *m, void *data)
 258 {
 259         struct drm_info_node *node = (struct drm_info_node *)m->private;
 260         struct ttm_resource_manager *man = (struct ttm_resource_manager *)node->info_ent->data;
 261         struct drm_printer p = drm_seq_file_printer(m);
 262
 263         ttm_resource_manager_debug(man, &p);
 264         return 0;
 265 }
 266 #endif
 267
 268 void qxl_ttm_debugfs_init(struct qxl_device *qdev)
 269 {
 270 #if defined(CONFIG_DEBUG_FS)
 271         static struct drm_info_list qxl_mem_types_list[QXL_DEBUGFS_MEM_TYPES];
 272         static char qxl_mem_types_names[QXL_DEBUGFS_MEM_TYPES][32];
 273         unsigned int i;
 274
 275         for (i = 0; i < QXL_DEBUGFS_MEM_TYPES; i++) {
 276                 if (i == 0)
 277                         sprintf(qxl_mem_types_names[i], "qxl_mem_mm");
 278                 else
 279                         sprintf(qxl_mem_types_names[i], "qxl_surf_mm");
 280                 qxl_mem_types_list[i].name = qxl_mem_types_names[i];
 281                 qxl_mem_types_list[i].show = &qxl_mm_dump_table;
 282                 qxl_mem_types_list[i].driver_features = 0;
 283                 if (i == 0)
 284                         qxl_mem_types_list[i].data = ttm_manager_type(&qdev->mman.bdev, TTM_PL_VRAM);
 285                 else
 286                         qxl_mem_types_list[i].data = ttm_manager_type(&qdev->mman.bdev, TTM_PL_PRIV);
 287
 288         }
 289         qxl_debugfs_add_files(qdev, qxl_mem_types_list, i);
 290 #endif
 291 }