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