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 <linux/dma-buf-map.h>
  27 #include <linux/io-mapping.h>
  28
  29 #include "qxl_drv.h"
  30 #include "qxl_object.h"
  31
  32 static void qxl_ttm_bo_destroy(struct ttm_buffer_object *tbo)
  33 {
  34         struct qxl_bo *bo;
  35         struct qxl_device *qdev;
  36
  37         bo = to_qxl_bo(tbo);
  38         qdev = to_qxl(bo->tbo.base.dev);
  39
  40         qxl_surface_evict(qdev, bo, false);
  41         WARN_ON_ONCE(bo->map_count > 0);
  42         mutex_lock(&qdev->gem.mutex);
  43         list_del_init(&bo->list);
  44         mutex_unlock(&qdev->gem.mutex);
  45         drm_gem_object_release(&bo->tbo.base);
  46         kfree(bo);
  47 }
  48
  49 bool qxl_ttm_bo_is_qxl_bo(struct ttm_buffer_object *bo)
  50 {
  51         if (bo->destroy == &qxl_ttm_bo_destroy)
  52                 return true;
  53         return false;
  54 }
  55
  56 void qxl_ttm_placement_from_domain(struct qxl_bo *qbo, u32 domain)
  57 {
  58         u32 c = 0;
  59         u32 pflag = 0;
  60         unsigned int i;
  61
  62         if (qbo->tbo.base.size <= PAGE_SIZE)
  63                 pflag |= TTM_PL_FLAG_TOPDOWN;
  64
  65         qbo->placement.placement = qbo->placements;
  66         qbo->placement.busy_placement = qbo->placements;
  67         if (domain == QXL_GEM_DOMAIN_VRAM) {
  68                 qbo->placements[c].mem_type = TTM_PL_VRAM;
  69                 qbo->placements[c++].flags = pflag;
  70         }
  71         if (domain == QXL_GEM_DOMAIN_SURFACE) {
  72                 qbo->placements[c].mem_type = TTM_PL_PRIV;
  73                 qbo->placements[c++].flags = pflag;
  74                 qbo->placements[c].mem_type = TTM_PL_VRAM;
  75                 qbo->placements[c++].flags = pflag;
  76         }
  77         if (domain == QXL_GEM_DOMAIN_CPU) {
  78                 qbo->placements[c].mem_type = TTM_PL_SYSTEM;
  79                 qbo->placements[c++].flags = pflag;
  80         }
  81         if (!c) {
  82                 qbo->placements[c].mem_type = TTM_PL_SYSTEM;
  83                 qbo->placements[c++].flags = 0;
  84         }
  85         qbo->placement.num_placement = c;
  86         qbo->placement.num_busy_placement = c;
  87         for (i = 0; i < c; ++i) {
  88                 qbo->placements[i].fpfn = 0;
  89                 qbo->placements[i].lpfn = 0;
  90         }
  91 }
  92
  93 static const struct drm_gem_object_funcs qxl_object_funcs = {
  94         .free = qxl_gem_object_free,
  95         .open = qxl_gem_object_open,
  96         .close = qxl_gem_object_close,
  97         .pin = qxl_gem_prime_pin,
  98         .unpin = qxl_gem_prime_unpin,
  99         .get_sg_table = qxl_gem_prime_get_sg_table,
 100         .vmap = qxl_gem_prime_vmap,
 101         .vunmap = qxl_gem_prime_vunmap,
 102         .mmap = drm_gem_ttm_mmap,
 103         .print_info = drm_gem_ttm_print_info,
 104 };
 105
 106 int qxl_bo_create(struct qxl_device *qdev, unsigned long size,
 107                   bool kernel, bool pinned, u32 domain, u32 priority,
 108                   struct qxl_surface *surf,
 109                   struct qxl_bo **bo_ptr)
 110 {
 111         struct ttm_operation_ctx ctx = { !kernel, false };
 112         struct qxl_bo *bo;
 113         enum ttm_bo_type type;
 114         int r;
 115
 116         if (kernel)
 117                 type = ttm_bo_type_kernel;
 118         else
 119                 type = ttm_bo_type_device;
 120         *bo_ptr = NULL;
 121         bo = kzalloc(sizeof(struct qxl_bo), GFP_KERNEL);
 122         if (bo == NULL)
 123                 return -ENOMEM;
 124         size = roundup(size, PAGE_SIZE);
 125         r = drm_gem_object_init(&qdev->ddev, &bo->tbo.base, size);
 126         if (unlikely(r)) {
 127                 kfree(bo);
 128                 return r;
 129         }
 130         bo->tbo.base.funcs = &qxl_object_funcs;
 131         bo->type = domain;
 132         bo->surface_id = 0;
 133         INIT_LIST_HEAD(&bo->list);
 134
 135         if (surf)
 136                 bo->surf = *surf;
 137
 138         qxl_ttm_placement_from_domain(bo, domain);
 139
 140         bo->tbo.priority = priority;
 141         r = ttm_bo_init_reserved(&qdev->mman.bdev, &bo->tbo, size, type,
 142                                  &bo->placement, 0, &ctx, size,
 143                                  NULL, NULL, &qxl_ttm_bo_destroy);
 144         if (unlikely(r != 0)) {
 145                 if (r != -ERESTARTSYS)
 146                         dev_err(qdev->ddev.dev,
 147                                 "object_init failed for (%lu, 0x%08X)\n",
 148                                 size, domain);
 149                 return r;
 150         }
 151         if (pinned)
 152                 ttm_bo_pin(&bo->tbo);
 153         ttm_bo_unreserve(&bo->tbo);
 154         *bo_ptr = bo;
 155         return 0;
 156 }
 157
 158 int qxl_bo_kmap(struct qxl_bo *bo, struct dma_buf_map *map)
 159 {
 160         int r;
 161
 162         if (bo->kptr) {
 163                 bo->map_count++;
 164                 goto out;
 165         }
 166         r = ttm_bo_vmap(&bo->tbo, &bo->map);
 167         if (r)
 168                 return r;
 169         bo->map_count = 1;
 170
 171         /* TODO: Remove kptr in favor of map everywhere. */
 172         if (bo->map.is_iomem)
 173                 bo->kptr = (void *)bo->map.vaddr_iomem;
 174         else
 175                 bo->kptr = bo->map.vaddr;
 176
 177 out:
 178         *map = bo->map;
 179         return 0;
 180 }
 181
 182 void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
 183                               struct qxl_bo *bo, int page_offset)
 184 {
 185         unsigned long offset;
 186         void *rptr;
 187         int ret;
 188         struct io_mapping *map;
 189         struct dma_buf_map bo_map;
 190
 191         if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
 192                 map = qdev->vram_mapping;
 193         else if (bo->tbo.mem.mem_type == TTM_PL_PRIV)
 194                 map = qdev->surface_mapping;
 195         else
 196                 goto fallback;
 197
 198         offset = bo->tbo.mem.start << PAGE_SHIFT;
 199         return io_mapping_map_atomic_wc(map, offset + page_offset);
 200 fallback:
 201         if (bo->kptr) {
 202                 rptr = bo->kptr + (page_offset * PAGE_SIZE);
 203                 return rptr;
 204         }
 205
 206         ret = qxl_bo_kmap(bo, &bo_map);
 207         if (ret)
 208                 return NULL;
 209         rptr = bo_map.vaddr; /* TODO: Use mapping abstraction properly */
 210
 211         rptr += page_offset * PAGE_SIZE;
 212         return rptr;
 213 }
 214
 215 void qxl_bo_kunmap(struct qxl_bo *bo)
 216 {
 217         if (bo->kptr == NULL)
 218                 return;
 219         bo->map_count--;
 220         if (bo->map_count > 0)
 221                 return;
 222         bo->kptr = NULL;
 223         ttm_bo_vunmap(&bo->tbo, &bo->map);
 224 }
 225
 226 void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev,
 227                                struct qxl_bo *bo, void *pmap)
 228 {
 229         if ((bo->tbo.mem.mem_type != TTM_PL_VRAM) &&
 230             (bo->tbo.mem.mem_type != TTM_PL_PRIV))
 231                 goto fallback;
 232
 233         io_mapping_unmap_atomic(pmap);
 234         return;
 235  fallback:
 236         qxl_bo_kunmap(bo);
 237 }
 238
 239 void qxl_bo_unref(struct qxl_bo **bo)
 240 {
 241         if ((*bo) == NULL)
 242                 return;
 243
 244         drm_gem_object_put(&(*bo)->tbo.base);
 245         *bo = NULL;
 246 }
 247
 248 struct qxl_bo *qxl_bo_ref(struct qxl_bo *bo)
 249 {
 250         drm_gem_object_get(&bo->tbo.base);
 251         return bo;
 252 }
 253
 254 static int __qxl_bo_pin(struct qxl_bo *bo)
 255 {
 256         struct ttm_operation_ctx ctx = { false, false };
 257         struct drm_device *ddev = bo->tbo.base.dev;
 258         int r;
 259
 260         if (bo->tbo.pin_count) {
 261                 ttm_bo_pin(&bo->tbo);
 262                 return 0;
 263         }
 264         qxl_ttm_placement_from_domain(bo, bo->type);
 265         r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
 266         if (likely(r == 0))
 267                 ttm_bo_pin(&bo->tbo);
 268         if (unlikely(r != 0))
 269                 dev_err(ddev->dev, "%p pin failed\n", bo);
 270         return r;
 271 }
 272
 273 static void __qxl_bo_unpin(struct qxl_bo *bo)
 274 {
 275         ttm_bo_unpin(&bo->tbo);
 276 }
 277
 278 /*
 279  * Reserve the BO before pinning the object.  If the BO was reserved
 280  * beforehand, use the internal version directly __qxl_bo_pin.
 281  *
 282  */
 283 int qxl_bo_pin(struct qxl_bo *bo)
 284 {
 285         int r;
 286
 287         r = qxl_bo_reserve(bo);
 288         if (r)
 289                 return r;
 290
 291         r = __qxl_bo_pin(bo);
 292         qxl_bo_unreserve(bo);
 293         return r;
 294 }
 295
 296 /*
 297  * Reserve the BO before pinning the object.  If the BO was reserved
 298  * beforehand, use the internal version directly __qxl_bo_unpin.
 299  *
 300  */
 301 int qxl_bo_unpin(struct qxl_bo *bo)
 302 {
 303         int r;
 304
 305         r = qxl_bo_reserve(bo);
 306         if (r)
 307                 return r;
 308
 309         __qxl_bo_unpin(bo);
 310         qxl_bo_unreserve(bo);
 311         return 0;
 312 }
 313
 314 void qxl_bo_force_delete(struct qxl_device *qdev)
 315 {
 316         struct qxl_bo *bo, *n;
 317
 318         if (list_empty(&qdev->gem.objects))
 319                 return;
 320         dev_err(qdev->ddev.dev, "Userspace still has active objects !\n");
 321         list_for_each_entry_safe(bo, n, &qdev->gem.objects, list) {
 322                 dev_err(qdev->ddev.dev, "%p %p %lu %lu force free\n",
 323                         &bo->tbo.base, bo, (unsigned long)bo->tbo.base.size,
 324                         *((unsigned long *)&bo->tbo.base.refcount));
 325                 mutex_lock(&qdev->gem.mutex);
 326                 list_del_init(&bo->list);
 327                 mutex_unlock(&qdev->gem.mutex);
 328                 /* this should unref the ttm bo */
 329                 drm_gem_object_put(&bo->tbo.base);
 330         }
 331 }
 332
 333 int qxl_bo_init(struct qxl_device *qdev)
 334 {
 335         return qxl_ttm_init(qdev);
 336 }
 337
 338 void qxl_bo_fini(struct qxl_device *qdev)
 339 {
 340         qxl_ttm_fini(qdev);
 341 }
 342
 343 int qxl_bo_check_id(struct qxl_device *qdev, struct qxl_bo *bo)
 344 {
 345         int ret;
 346
 347         if (bo->type == QXL_GEM_DOMAIN_SURFACE && bo->surface_id == 0) {
 348                 /* allocate a surface id for this surface now */
 349                 ret = qxl_surface_id_alloc(qdev, bo);
 350                 if (ret)
 351                         return ret;
 352
 353                 ret = qxl_hw_surface_alloc(qdev, bo);
 354                 if (ret)
 355                         return ret;
 356         }
 357         return 0;
 358 }
 359
 360 int qxl_surf_evict(struct qxl_device *qdev)
 361 {
 362         struct ttm_resource_manager *man;
 363
 364         man = ttm_manager_type(&qdev->mman.bdev, TTM_PL_PRIV);
 365         return ttm_resource_manager_evict_all(&qdev->mman.bdev, man);
 366 }
 367
 368 int qxl_vram_evict(struct qxl_device *qdev)
 369 {
 370         struct ttm_resource_manager *man;
 371
 372         man = ttm_manager_type(&qdev->mman.bdev, TTM_PL_VRAM);
 373         return ttm_resource_manager_evict_all(&qdev->mman.bdev, man);
 374 }