drivers/gpu/drm/qxl/qxl_object.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 "qxl_drv.h"
  27 #include "qxl_object.h"
  28
  29 #include <linux/io-mapping.h>
  30 static void qxl_ttm_bo_destroy(struct ttm_buffer_object *tbo)
  31 {
  32         struct qxl_bo *bo;
  33         struct qxl_device *qdev;
  34
  35         bo = container_of(tbo, struct qxl_bo, tbo);
  36         qdev = (struct qxl_device *)bo->gem_base.dev->dev_private;
  37
  38         qxl_surface_evict(qdev, bo, false);
  39         qxl_fence_fini(&bo->fence);
  40         mutex_lock(&qdev->gem.mutex);
  41         list_del_init(&bo->list);
  42         mutex_unlock(&qdev->gem.mutex);
  43         drm_gem_object_release(&bo->gem_base);
  44         kfree(bo);
  45 }
  46
  47 bool qxl_ttm_bo_is_qxl_bo(struct ttm_buffer_object *bo)
  48 {
  49         if (bo->destroy == &qxl_ttm_bo_destroy)
  50                 return true;
  51         return false;
  52 }
  53
  54 void qxl_ttm_placement_from_domain(struct qxl_bo *qbo, u32 domain, bool pinned)
  55 {
  56         u32 c = 0;
  57         u32 pflag = pinned ? TTM_PL_FLAG_NO_EVICT : 0;
  58
  59         qbo->placement.fpfn = 0;
  60         qbo->placement.lpfn = 0;
  61         qbo->placement.placement = qbo->placements;
  62         qbo->placement.busy_placement = qbo->placements;
  63         if (domain == QXL_GEM_DOMAIN_VRAM)
  64                 qbo->placements[c++] = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_VRAM | pflag;
  65         if (domain == QXL_GEM_DOMAIN_SURFACE)
  66                 qbo->placements[c++] = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_PRIV0 | pflag;
  67         if (domain == QXL_GEM_DOMAIN_CPU)
  68                 qbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM | pflag;
  69         if (!c)
  70                 qbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
  71         qbo->placement.num_placement = c;
  72         qbo->placement.num_busy_placement = c;
  73 }
  74
  75
  76 int qxl_bo_create(struct qxl_device *qdev,
  77                   unsigned long size, bool kernel, bool pinned, u32 domain,
  78                   struct qxl_surface *surf,
  79                   struct qxl_bo **bo_ptr)
  80 {
  81         struct qxl_bo *bo;
  82         enum ttm_bo_type type;
  83         int r;
  84
  85         if (unlikely(qdev->mman.bdev.dev_mapping == NULL))
  86                 qdev->mman.bdev.dev_mapping = qdev->ddev->dev_mapping;
  87         if (kernel)
  88                 type = ttm_bo_type_kernel;
  89         else
  90                 type = ttm_bo_type_device;
  91         *bo_ptr = NULL;
  92         bo = kzalloc(sizeof(struct qxl_bo), GFP_KERNEL);
  93         if (bo == NULL)
  94                 return -ENOMEM;
  95         size = roundup(size, PAGE_SIZE);
  96         r = drm_gem_object_init(qdev->ddev, &bo->gem_base, size);
  97         if (unlikely(r)) {
  98                 kfree(bo);
  99                 return r;
 100         }
 101         bo->gem_base.driver_private = NULL;
 102         bo->type = domain;
 103         bo->pin_count = pinned ? 1 : 0;
 104         bo->surface_id = 0;
 105         qxl_fence_init(qdev, &bo->fence);
 106         INIT_LIST_HEAD(&bo->list);
 107
 108         if (surf)
 109                 bo->surf = *surf;
 110
 111         qxl_ttm_placement_from_domain(bo, domain, pinned);
 112
 113         r = ttm_bo_init(&qdev->mman.bdev, &bo->tbo, size, type,
 114                         &bo->placement, 0, !kernel, NULL, size,
 115                         NULL, &qxl_ttm_bo_destroy);
 116         if (unlikely(r != 0)) {
 117                 if (r != -ERESTARTSYS)
 118                         dev_err(qdev->dev,
 119                                 "object_init failed for (%lu, 0x%08X)\n",
 120                                 size, domain);
 121                 return r;
 122         }
 123         *bo_ptr = bo;
 124         return 0;
 125 }
 126
 127 int qxl_bo_kmap(struct qxl_bo *bo, void **ptr)
 128 {
 129         bool is_iomem;
 130         int r;
 131
 132         if (bo->kptr) {
 133                 if (ptr)
 134                         *ptr = bo->kptr;
 135                 return 0;
 136         }
 137         r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
 138         if (r)
 139                 return r;
 140         bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
 141         if (ptr)
 142                 *ptr = bo->kptr;
 143         return 0;
 144 }
 145
 146 void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
 147                               struct qxl_bo *bo, int page_offset)
 148 {
 149         struct ttm_mem_type_manager *man = &bo->tbo.bdev->man[bo->tbo.mem.mem_type];
 150         void *rptr;
 151         int ret;
 152         struct io_mapping *map;
 153
 154         if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
 155                 map = qdev->vram_mapping;
 156         else if (bo->tbo.mem.mem_type == TTM_PL_PRIV0)
 157                 map = qdev->surface_mapping;
 158         else
 159                 goto fallback;
 160
 161         (void) ttm_mem_io_lock(man, false);
 162         ret = ttm_mem_io_reserve(bo->tbo.bdev, &bo->tbo.mem);
 163         ttm_mem_io_unlock(man);
 164
 165         return io_mapping_map_atomic_wc(map, bo->tbo.mem.bus.offset + page_offset);
 166 fallback:
 167         if (bo->kptr) {
 168                 rptr = bo->kptr + (page_offset * PAGE_SIZE);
 169                 return rptr;
 170         }
 171
 172         ret = qxl_bo_kmap(bo, &rptr);
 173         if (ret)
 174                 return NULL;
 175
 176         rptr += page_offset * PAGE_SIZE;
 177         return rptr;
 178 }
 179
 180 void qxl_bo_kunmap(struct qxl_bo *bo)
 181 {
 182         if (bo->kptr == NULL)
 183                 return;
 184         bo->kptr = NULL;
 185         ttm_bo_kunmap(&bo->kmap);
 186 }
 187
 188 void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev,
 189                                struct qxl_bo *bo, void *pmap)
 190 {
 191         struct ttm_mem_type_manager *man = &bo->tbo.bdev->man[bo->tbo.mem.mem_type];
 192         struct io_mapping *map;
 193
 194         if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
 195                 map = qdev->vram_mapping;
 196         else if (bo->tbo.mem.mem_type == TTM_PL_PRIV0)
 197                 map = qdev->surface_mapping;
 198         else
 199                 goto fallback;
 200
 201         io_mapping_unmap_atomic(pmap);
 202
 203         (void) ttm_mem_io_lock(man, false);
 204         ttm_mem_io_free(bo->tbo.bdev, &bo->tbo.mem);
 205         ttm_mem_io_unlock(man);
 206         return ;
 207  fallback:
 208         qxl_bo_kunmap(bo);
 209 }
 210
 211 void qxl_bo_unref(struct qxl_bo **bo)
 212 {
 213         struct ttm_buffer_object *tbo;
 214
 215         if ((*bo) == NULL)
 216                 return;
 217         tbo = &((*bo)->tbo);
 218         ttm_bo_unref(&tbo);
 219         if (tbo == NULL)
 220                 *bo = NULL;
 221 }
 222
 223 struct qxl_bo *qxl_bo_ref(struct qxl_bo *bo)
 224 {
 225         ttm_bo_reference(&bo->tbo);
 226         return bo;
 227 }
 228
 229 int qxl_bo_pin(struct qxl_bo *bo, u32 domain, u64 *gpu_addr)
 230 {
 231         struct qxl_device *qdev = (struct qxl_device *)bo->gem_base.dev->dev_private;
 232         int r;
 233
 234         if (bo->pin_count) {
 235                 bo->pin_count++;
 236                 if (gpu_addr)
 237                         *gpu_addr = qxl_bo_gpu_offset(bo);
 238                 return 0;
 239         }
 240         qxl_ttm_placement_from_domain(bo, domain, true);
 241         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 242         if (likely(r == 0)) {
 243                 bo->pin_count = 1;
 244                 if (gpu_addr != NULL)
 245                         *gpu_addr = qxl_bo_gpu_offset(bo);
 246         }
 247         if (unlikely(r != 0))
 248                 dev_err(qdev->dev, "%p pin failed\n", bo);
 249         return r;
 250 }
 251
 252 int qxl_bo_unpin(struct qxl_bo *bo)
 253 {
 254         struct qxl_device *qdev = (struct qxl_device *)bo->gem_base.dev->dev_private;
 255         int r, i;
 256
 257         if (!bo->pin_count) {
 258                 dev_warn(qdev->dev, "%p unpin not necessary\n", bo);
 259                 return 0;
 260         }
 261         bo->pin_count--;
 262         if (bo->pin_count)
 263                 return 0;
 264         for (i = 0; i < bo->placement.num_placement; i++)
 265                 bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
 266         r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 267         if (unlikely(r != 0))
 268                 dev_err(qdev->dev, "%p validate failed for unpin\n", bo);
 269         return r;
 270 }
 271
 272 void qxl_bo_force_delete(struct qxl_device *qdev)
 273 {
 274         struct qxl_bo *bo, *n;
 275
 276         if (list_empty(&qdev->gem.objects))
 277                 return;
 278         dev_err(qdev->dev, "Userspace still has active objects !\n");
 279         list_for_each_entry_safe(bo, n, &qdev->gem.objects, list) {
 280                 mutex_lock(&qdev->ddev->struct_mutex);
 281                 dev_err(qdev->dev, "%p %p %lu %lu force free\n",
 282                         &bo->gem_base, bo, (unsigned long)bo->gem_base.size,
 283                         *((unsigned long *)&bo->gem_base.refcount));
 284                 mutex_lock(&qdev->gem.mutex);
 285                 list_del_init(&bo->list);
 286                 mutex_unlock(&qdev->gem.mutex);
 287                 /* this should unref the ttm bo */
 288                 drm_gem_object_unreference(&bo->gem_base);
 289                 mutex_unlock(&qdev->ddev->struct_mutex);
 290         }
 291 }
 292
 293 int qxl_bo_init(struct qxl_device *qdev)
 294 {
 295         return qxl_ttm_init(qdev);
 296 }
 297
 298 void qxl_bo_fini(struct qxl_device *qdev)
 299 {
 300         qxl_ttm_fini(qdev);
 301 }
 302
 303 int qxl_bo_check_id(struct qxl_device *qdev, struct qxl_bo *bo)
 304 {
 305         int ret;
 306         if (bo->type == QXL_GEM_DOMAIN_SURFACE && bo->surface_id == 0) {
 307                 /* allocate a surface id for this surface now */
 308                 ret = qxl_surface_id_alloc(qdev, bo);
 309                 if (ret)
 310                         return ret;
 311
 312                 ret = qxl_hw_surface_alloc(qdev, bo, NULL);
 313                 if (ret)
 314                         return ret;
 315         }
 316         return 0;
 317 }
 318
 319 int qxl_surf_evict(struct qxl_device *qdev)
 320 {
 321         return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_PRIV0);
 322 }
 323
 324 int qxl_vram_evict(struct qxl_device *qdev)
 325 {
 326         return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_VRAM);
 327 }