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_placement.h>
  36
  37 #include "qxl_drv.h"
  38 #include "qxl_object.h"
  39
  40 static struct qxl_device *qxl_get_qdev(struct ttm_bo_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_bo_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_cached;
  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_cached;
  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_bo_device *bdev,
 103                                     struct ttm_tt *ttm)
 104 {
 105         ttm_tt_destroy_common(bdev, ttm);
 106         ttm_tt_fini(ttm);
 107         kfree(ttm);
 108 }
 109
 110 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_buffer_object *bo,
 111                                         uint32_t page_flags)
 112 {
 113         struct ttm_tt *ttm;
 114
 115         ttm = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
 116         if (ttm == NULL)
 117                 return NULL;
 118         if (ttm_tt_init(ttm, bo, page_flags, ttm_cached)) {
 119                 kfree(ttm);
 120                 return NULL;
 121         }
 122         return ttm;
 123 }
 124
 125 static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
 126                                bool evict,
 127                                struct ttm_resource *new_mem)
 128 {
 129         struct qxl_bo *qbo;
 130         struct qxl_device *qdev;
 131
 132         if (!qxl_ttm_bo_is_qxl_bo(bo))
 133                 return;
 134         qbo = to_qxl_bo(bo);
 135         qdev = to_qxl(qbo->tbo.base.dev);
 136
 137         if (bo->mem.mem_type == TTM_PL_PRIV && qbo->surface_id)
 138                 qxl_surface_evict(qdev, qbo, new_mem ? true : false);
 139 }
 140
 141 static int qxl_bo_move(struct ttm_buffer_object *bo, bool evict,
 142                        struct ttm_operation_ctx *ctx,
 143                        struct ttm_resource *new_mem,
 144                        struct ttm_place *hop)
 145 {
 146         struct ttm_resource *old_mem = &bo->mem;
 147         int ret;
 148
 149         qxl_bo_move_notify(bo, evict, new_mem);
 150
 151         ret = ttm_bo_wait_ctx(bo, ctx);
 152         if (ret)
 153                 goto out;
 154
 155         if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
 156                 ttm_bo_move_null(bo, new_mem);
 157                 return 0;
 158         }
 159         ret = ttm_bo_move_memcpy(bo, ctx, new_mem);
 160 out:
 161         if (ret) {
 162                 swap(*new_mem, bo->mem);
 163                 qxl_bo_move_notify(bo, false, new_mem);
 164                 swap(*new_mem, bo->mem);
 165         }
 166         return ret;
 167 }
 168
 169 static void qxl_bo_delete_mem_notify(struct ttm_buffer_object *bo)
 170 {
 171         qxl_bo_move_notify(bo, false, NULL);
 172 }
 173
 174 static struct ttm_bo_driver qxl_bo_driver = {
 175         .ttm_tt_create = &qxl_ttm_tt_create,
 176         .ttm_tt_destroy = &qxl_ttm_backend_destroy,
 177         .eviction_valuable = ttm_bo_eviction_valuable,
 178         .evict_flags = &qxl_evict_flags,
 179         .move = &qxl_bo_move,
 180         .io_mem_reserve = &qxl_ttm_io_mem_reserve,
 181         .delete_mem_notify = &qxl_bo_delete_mem_notify,
 182 };
 183
 184 static int qxl_ttm_init_mem_type(struct qxl_device *qdev,
 185                                  unsigned int type,
 186                                  uint64_t size)
 187 {
 188         return ttm_range_man_init(&qdev->mman.bdev, type, false, size);
 189 }
 190
 191 int qxl_ttm_init(struct qxl_device *qdev)
 192 {
 193         int r;
 194         int num_io_pages; /* != rom->num_io_pages, we include surface0 */
 195
 196         /* No others user of address space so set it to 0 */
 197         r = ttm_bo_device_init(&qdev->mman.bdev, &qxl_bo_driver, NULL,
 198                                qdev->ddev.anon_inode->i_mapping,
 199                                qdev->ddev.vma_offset_manager,
 200                                false, false);
 201         if (r) {
 202                 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
 203                 return r;
 204         }
 205         /* NOTE: this includes the framebuffer (aka surface 0) */
 206         num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE;
 207         r = qxl_ttm_init_mem_type(qdev, TTM_PL_VRAM, num_io_pages);
 208         if (r) {
 209                 DRM_ERROR("Failed initializing VRAM heap.\n");
 210                 return r;
 211         }
 212         r = qxl_ttm_init_mem_type(qdev, TTM_PL_PRIV,
 213                                   qdev->surfaceram_size / PAGE_SIZE);
 214         if (r) {
 215                 DRM_ERROR("Failed initializing Surfaces heap.\n");
 216                 return r;
 217         }
 218         DRM_INFO("qxl: %uM of VRAM memory size\n",
 219                  (unsigned int)qdev->vram_size / (1024 * 1024));
 220         DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n",
 221                  ((unsigned int)num_io_pages * PAGE_SIZE) / (1024 * 1024));
 222         DRM_INFO("qxl: %uM of Surface memory size\n",
 223                  (unsigned int)qdev->surfaceram_size / (1024 * 1024));
 224         return 0;
 225 }
 226
 227 void qxl_ttm_fini(struct qxl_device *qdev)
 228 {
 229         ttm_range_man_fini(&qdev->mman.bdev, TTM_PL_VRAM);
 230         ttm_range_man_fini(&qdev->mman.bdev, TTM_PL_PRIV);
 231         ttm_bo_device_release(&qdev->mman.bdev);
 232         DRM_INFO("qxl: ttm finalized\n");
 233 }
 234
 235 #define QXL_DEBUGFS_MEM_TYPES 2
 236
 237 #if defined(CONFIG_DEBUG_FS)
 238 static int qxl_mm_dump_table(struct seq_file *m, void *data)
 239 {
 240         struct drm_info_node *node = (struct drm_info_node *)m->private;
 241         struct ttm_resource_manager *man = (struct ttm_resource_manager *)node->info_ent->data;
 242         struct drm_printer p = drm_seq_file_printer(m);
 243
 244         ttm_resource_manager_debug(man, &p);
 245         return 0;
 246 }
 247 #endif
 248
 249 void qxl_ttm_debugfs_init(struct qxl_device *qdev)
 250 {
 251 #if defined(CONFIG_DEBUG_FS)
 252         static struct drm_info_list qxl_mem_types_list[QXL_DEBUGFS_MEM_TYPES];
 253         static char qxl_mem_types_names[QXL_DEBUGFS_MEM_TYPES][32];
 254         unsigned int i;
 255
 256         for (i = 0; i < QXL_DEBUGFS_MEM_TYPES; i++) {
 257                 if (i == 0)
 258                         sprintf(qxl_mem_types_names[i], "qxl_mem_mm");
 259                 else
 260                         sprintf(qxl_mem_types_names[i], "qxl_surf_mm");
 261                 qxl_mem_types_list[i].name = qxl_mem_types_names[i];
 262                 qxl_mem_types_list[i].show = &qxl_mm_dump_table;
 263                 qxl_mem_types_list[i].driver_features = 0;
 264                 if (i == 0)
 265                         qxl_mem_types_list[i].data = ttm_manager_type(&qdev->mman.bdev, TTM_PL_VRAM);
 266                 else
 267                         qxl_mem_types_list[i].data = ttm_manager_type(&qdev->mman.bdev, TTM_PL_PRIV);
 268
 269         }
 270         qxl_debugfs_add_files(qdev, qxl_mem_types_list, i);
 271 #endif
 272 }