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.h>
  33 #include <drm/ttm/ttm_placement.h>
  34 #include <drm/ttm/ttm_range_manager.h>
  35 #include <drm/ttm/ttm_tt.h>
  36
  37 #include "qxl_drv.h"
  38 #include "qxl_object.h"
  39
  40 static struct qxl_device *qxl_get_qdev(struct ttm_device *bdev)
  41 {
  42         struct qxl_mman *mman;
  43         struct qxl_device *qdev;
  44
  45         mman = container_of(bdev, struct qxl_mman, bdev);
  46         qdev = container_of(mman, struct qxl_device, mman);
  47         return qdev;
  48 }
  49
  50 static void qxl_evict_flags(struct ttm_buffer_object *bo,
  51                                 struct ttm_placement *placement)
  52 {
  53         struct qxl_bo *qbo;
  54         static const struct ttm_place placements = {
  55                 .fpfn = 0,
  56                 .lpfn = 0,
  57                 .mem_type = TTM_PL_SYSTEM,
  58                 .flags = 0
  59         };
  60
  61         if (!qxl_ttm_bo_is_qxl_bo(bo)) {
  62                 placement->placement = &placements;
  63                 placement->busy_placement = &placements;
  64                 placement->num_placement = 1;
  65                 placement->num_busy_placement = 1;
  66                 return;
  67         }
  68         qbo = to_qxl_bo(bo);
  69         qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU);
  70         *placement = qbo->placement;
  71 }
  72
  73 int qxl_ttm_io_mem_reserve(struct ttm_device *bdev,
  74                            struct ttm_resource *mem)
  75 {
  76         struct qxl_device *qdev = qxl_get_qdev(bdev);
  77
  78         switch (mem->mem_type) {
  79         case TTM_PL_SYSTEM:
  80                 /* system memory */
  81                 return 0;
  82         case TTM_PL_VRAM:
  83                 mem->bus.is_iomem = true;
  84                 mem->bus.offset = (mem->start << PAGE_SHIFT) + qdev->vram_base;
  85                 mem->bus.caching = ttm_write_combined;
  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                 mem->bus.caching = ttm_write_combined;
  92                 break;
  93         default:
  94                 return -EINVAL;
  95         }
  96         return 0;
  97 }
  98
  99 /*
 100  * TTM backend functions.
 101  */
 102 static void qxl_ttm_backend_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)
 103 {
 104         ttm_tt_fini(ttm);
 105         kfree(ttm);
 106 }
 107
 108 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_buffer_object *bo,
 109                                         uint32_t page_flags)
 110 {
 111         struct ttm_tt *ttm;
 112
 113         ttm = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
 114         if (ttm == NULL)
 115                 return NULL;
 116         if (ttm_tt_init(ttm, bo, page_flags, ttm_cached, 0)) {
 117                 kfree(ttm);
 118                 return NULL;
 119         }
 120         return ttm;
 121 }
 122
 123 static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
 124                                struct ttm_resource *new_mem)
 125 {
 126         struct qxl_bo *qbo;
 127         struct qxl_device *qdev;
 128
 129         if (!qxl_ttm_bo_is_qxl_bo(bo) || !bo->resource)
 130                 return;
 131         qbo = to_qxl_bo(bo);
 132         qdev = to_qxl(qbo->tbo.base.dev);
 133
 134         if (bo->resource->mem_type == TTM_PL_PRIV && qbo->surface_id)
 135                 qxl_surface_evict(qdev, qbo, new_mem ? true : false);
 136 }
 137
 138 static int qxl_bo_move(struct ttm_buffer_object *bo, bool evict,
 139                        struct ttm_operation_ctx *ctx,
 140                        struct ttm_resource *new_mem,
 141                        struct ttm_place *hop)
 142 {
 143         struct ttm_resource *old_mem = bo->resource;
 144         int ret;
 145
 146         if (!old_mem) {
 147                 if (new_mem->mem_type != TTM_PL_SYSTEM) {
 148                         hop->mem_type = TTM_PL_SYSTEM;
 149                         hop->flags = TTM_PL_FLAG_TEMPORARY;
 150                         return -EMULTIHOP;
 151                 }
 152
 153                 ttm_bo_move_null(bo, new_mem);
 154                 return 0;
 155         }
 156
 157         qxl_bo_move_notify(bo, new_mem);
 158
 159         ret = ttm_bo_wait_ctx(bo, ctx);
 160         if (ret)
 161                 return ret;
 162
 163         if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
 164                 ttm_bo_move_null(bo, new_mem);
 165                 return 0;
 166         }
 167         return ttm_bo_move_memcpy(bo, ctx, new_mem);
 168 }
 169
 170 static void qxl_bo_delete_mem_notify(struct ttm_buffer_object *bo)
 171 {
 172         qxl_bo_move_notify(bo, NULL);
 173 }
 174
 175 static struct ttm_device_funcs qxl_bo_driver = {
 176         .ttm_tt_create = &qxl_ttm_tt_create,
 177         .ttm_tt_destroy = &qxl_ttm_backend_destroy,
 178         .eviction_valuable = ttm_bo_eviction_valuable,
 179         .evict_flags = &qxl_evict_flags,
 180         .move = &qxl_bo_move,
 181         .io_mem_reserve = &qxl_ttm_io_mem_reserve,
 182         .delete_mem_notify = &qxl_bo_delete_mem_notify,
 183 };
 184
 185 static int qxl_ttm_init_mem_type(struct qxl_device *qdev,
 186                                  unsigned int type,
 187                                  uint64_t size)
 188 {
 189         return ttm_range_man_init(&qdev->mman.bdev, type, false, size);
 190 }
 191
 192 int qxl_ttm_init(struct qxl_device *qdev)
 193 {
 194         int r;
 195         int num_io_pages; /* != rom->num_io_pages, we include surface0 */
 196
 197         /* No others user of address space so set it to 0 */
 198         r = ttm_device_init(&qdev->mman.bdev, &qxl_bo_driver, NULL,
 199                             qdev->ddev.anon_inode->i_mapping,
 200                             qdev->ddev.vma_offset_manager,
 201                             false, false);
 202         if (r) {
 203                 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
 204                 return r;
 205         }
 206         /* NOTE: this includes the framebuffer (aka surface 0) */
 207         num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE;
 208         r = qxl_ttm_init_mem_type(qdev, TTM_PL_VRAM, num_io_pages);
 209         if (r) {
 210                 DRM_ERROR("Failed initializing VRAM heap.\n");
 211                 return r;
 212         }
 213         r = qxl_ttm_init_mem_type(qdev, TTM_PL_PRIV,
 214                                   qdev->surfaceram_size / PAGE_SIZE);
 215         if (r) {
 216                 DRM_ERROR("Failed initializing Surfaces heap.\n");
 217                 return r;
 218         }
 219         DRM_INFO("qxl: %uM of VRAM memory size\n",
 220                  (unsigned int)qdev->vram_size / (1024 * 1024));
 221         DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n",
 222                  ((unsigned int)num_io_pages * PAGE_SIZE) / (1024 * 1024));
 223         DRM_INFO("qxl: %uM of Surface memory size\n",
 224                  (unsigned int)qdev->surfaceram_size / (1024 * 1024));
 225         return 0;
 226 }
 227
 228 void qxl_ttm_fini(struct qxl_device *qdev)
 229 {
 230         ttm_range_man_fini(&qdev->mman.bdev, TTM_PL_VRAM);
 231         ttm_range_man_fini(&qdev->mman.bdev, TTM_PL_PRIV);
 232         ttm_device_fini(&qdev->mman.bdev);
 233         DRM_INFO("qxl: ttm finalized\n");
 234 }
 235
 236 void qxl_ttm_debugfs_init(struct qxl_device *qdev)
 237 {
 238 #if defined(CONFIG_DEBUG_FS)
 239         ttm_resource_manager_create_debugfs(ttm_manager_type(&qdev->mman.bdev,
 240                                                              TTM_PL_VRAM),
 241                                             qdev->ddev.primary->debugfs_root, "qxl_mem_mm");
 242         ttm_resource_manager_create_debugfs(ttm_manager_type(&qdev->mman.bdev,
 243                                                              TTM_PL_PRIV),
 244                                             qdev->ddev.primary->debugfs_root, "qxl_surf_mm");
 245 #endif
 246 }