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                 .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM
  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, false);
  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.base = qdev->vram_base;
  85                 mem->bus.offset = mem->start << PAGE_SHIFT;
  86                 break;
  87         case TTM_PL_PRIV:
  88                 mem->bus.is_iomem = true;
  89                 mem->bus.base = qdev->surfaceram_base;
  90                 mem->bus.offset = mem->start << PAGE_SHIFT;
  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_tt *ttm,
 108                                 struct ttm_resource *bo_mem)
 109 {
 110         struct qxl_ttm_tt *gtt = (void *)ttm;
 111
 112         gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
 113         if (!ttm->num_pages) {
 114                 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
 115                      ttm->num_pages, bo_mem, ttm);
 116         }
 117         /* Not implemented */
 118         return -1;
 119 }
 120
 121 static void qxl_ttm_backend_unbind(struct ttm_tt *ttm)
 122 {
 123         /* Not implemented */
 124 }
 125
 126 static void qxl_ttm_backend_destroy(struct ttm_tt *ttm)
 127 {
 128         struct qxl_ttm_tt *gtt = (void *)ttm;
 129
 130         ttm_tt_fini(&gtt->ttm);
 131         kfree(gtt);
 132 }
 133
 134 static struct ttm_backend_func qxl_backend_func = {
 135         .bind = &qxl_ttm_backend_bind,
 136         .unbind = &qxl_ttm_backend_unbind,
 137         .destroy = &qxl_ttm_backend_destroy,
 138 };
 139
 140 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_buffer_object *bo,
 141                                         uint32_t page_flags)
 142 {
 143         struct qxl_device *qdev;
 144         struct qxl_ttm_tt *gtt;
 145
 146         qdev = qxl_get_qdev(bo->bdev);
 147         gtt = kzalloc(sizeof(struct qxl_ttm_tt), GFP_KERNEL);
 148         if (gtt == NULL)
 149                 return NULL;
 150         gtt->ttm.func = &qxl_backend_func;
 151         gtt->qdev = qdev;
 152         if (ttm_tt_init(&gtt->ttm, bo, page_flags)) {
 153                 kfree(gtt);
 154                 return NULL;
 155         }
 156         return &gtt->ttm;
 157 }
 158
 159 static void qxl_move_null(struct ttm_buffer_object *bo,
 160                              struct ttm_resource *new_mem)
 161 {
 162         struct ttm_resource *old_mem = &bo->mem;
 163
 164         BUG_ON(old_mem->mm_node != NULL);
 165         *old_mem = *new_mem;
 166         new_mem->mm_node = NULL;
 167 }
 168
 169 static int qxl_bo_move(struct ttm_buffer_object *bo, bool evict,
 170                        struct ttm_operation_ctx *ctx,
 171                        struct ttm_resource *new_mem)
 172 {
 173         struct ttm_resource *old_mem = &bo->mem;
 174         int ret;
 175
 176         ret = ttm_bo_wait(bo, ctx->interruptible, ctx->no_wait_gpu);
 177         if (ret)
 178                 return ret;
 179
 180         if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
 181                 qxl_move_null(bo, new_mem);
 182                 return 0;
 183         }
 184         return ttm_bo_move_memcpy(bo, ctx, new_mem);
 185 }
 186
 187 static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
 188                                bool evict,
 189                                struct ttm_resource *new_mem)
 190 {
 191         struct qxl_bo *qbo;
 192         struct qxl_device *qdev;
 193
 194         if (!qxl_ttm_bo_is_qxl_bo(bo))
 195                 return;
 196         qbo = to_qxl_bo(bo);
 197         qdev = to_qxl(qbo->tbo.base.dev);
 198
 199         if (bo->mem.mem_type == TTM_PL_PRIV && qbo->surface_id)
 200                 qxl_surface_evict(qdev, qbo, new_mem ? true : false);
 201 }
 202
 203 static struct ttm_bo_driver qxl_bo_driver = {
 204         .ttm_tt_create = &qxl_ttm_tt_create,
 205         .eviction_valuable = ttm_bo_eviction_valuable,
 206         .evict_flags = &qxl_evict_flags,
 207         .move = &qxl_bo_move,
 208         .io_mem_reserve = &qxl_ttm_io_mem_reserve,
 209         .move_notify = &qxl_bo_move_notify,
 210 };
 211
 212 static int qxl_ttm_init_mem_type(struct qxl_device *qdev,
 213                                  unsigned int type,
 214                                  uint64_t size)
 215 {
 216         return ttm_range_man_init(&qdev->mman.bdev, type, TTM_PL_MASK_CACHING,
 217                                   TTM_PL_FLAG_CACHED, false, size);
 218 }
 219
 220 int qxl_ttm_init(struct qxl_device *qdev)
 221 {
 222         int r;
 223         int num_io_pages; /* != rom->num_io_pages, we include surface0 */
 224
 225         /* No others user of address space so set it to 0 */
 226         r = ttm_bo_device_init(&qdev->mman.bdev,
 227                                &qxl_bo_driver,
 228                                qdev->ddev.anon_inode->i_mapping,
 229                                qdev->ddev.vma_offset_manager,
 230                                false);
 231         if (r) {
 232                 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
 233                 return r;
 234         }
 235         /* NOTE: this includes the framebuffer (aka surface 0) */
 236         num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE;
 237         r = qxl_ttm_init_mem_type(qdev, TTM_PL_VRAM, num_io_pages);
 238         if (r) {
 239                 DRM_ERROR("Failed initializing VRAM heap.\n");
 240                 return r;
 241         }
 242         r = qxl_ttm_init_mem_type(qdev, TTM_PL_PRIV,
 243                                   qdev->surfaceram_size / PAGE_SIZE);
 244         if (r) {
 245                 DRM_ERROR("Failed initializing Surfaces heap.\n");
 246                 return r;
 247         }
 248         DRM_INFO("qxl: %uM of VRAM memory size\n",
 249                  (unsigned int)qdev->vram_size / (1024 * 1024));
 250         DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n",
 251                  ((unsigned int)num_io_pages * PAGE_SIZE) / (1024 * 1024));
 252         DRM_INFO("qxl: %uM of Surface memory size\n",
 253                  (unsigned int)qdev->surfaceram_size / (1024 * 1024));
 254         return 0;
 255 }
 256
 257 void qxl_ttm_fini(struct qxl_device *qdev)
 258 {
 259         ttm_range_man_fini(&qdev->mman.bdev, TTM_PL_VRAM);
 260         ttm_range_man_fini(&qdev->mman.bdev, TTM_PL_PRIV);
 261         ttm_bo_device_release(&qdev->mman.bdev);
 262         DRM_INFO("qxl: ttm finalized\n");
 263 }
 264
 265 #define QXL_DEBUGFS_MEM_TYPES 2
 266
 267 #if defined(CONFIG_DEBUG_FS)
 268 static int qxl_mm_dump_table(struct seq_file *m, void *data)
 269 {
 270         struct drm_info_node *node = (struct drm_info_node *)m->private;
 271         struct ttm_resource_manager *man = (struct ttm_resource_manager *)node->info_ent->data;
 272         struct drm_printer p = drm_seq_file_printer(m);
 273
 274         ttm_resource_manager_debug(man, &p);
 275         return 0;
 276 }
 277 #endif
 278
 279 void qxl_ttm_debugfs_init(struct qxl_device *qdev)
 280 {
 281 #if defined(CONFIG_DEBUG_FS)
 282         static struct drm_info_list qxl_mem_types_list[QXL_DEBUGFS_MEM_TYPES];
 283         static char qxl_mem_types_names[QXL_DEBUGFS_MEM_TYPES][32];
 284         unsigned int i;
 285
 286         for (i = 0; i < QXL_DEBUGFS_MEM_TYPES; i++) {
 287                 if (i == 0)
 288                         sprintf(qxl_mem_types_names[i], "qxl_mem_mm");
 289                 else
 290                         sprintf(qxl_mem_types_names[i], "qxl_surf_mm");
 291                 qxl_mem_types_list[i].name = qxl_mem_types_names[i];
 292                 qxl_mem_types_list[i].show = &qxl_mm_dump_table;
 293                 qxl_mem_types_list[i].driver_features = 0;
 294                 if (i == 0)
 295                         qxl_mem_types_list[i].data = ttm_manager_type(&qdev->mman.bdev, TTM_PL_VRAM);
 296                 else
 297                         qxl_mem_types_list[i].data = ttm_manager_type(&qdev->mman.bdev, TTM_PL_PRIV);
 298
 299         }
 300         qxl_debugfs_add_files(qdev, qxl_mem_types_list, i);
 301 #endif
 302 }