linux/drivers/gpu/drm/qxl/qxl_object.c
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   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>
  30static 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
  46bool 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
  53void 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_PRIV | 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
  78int 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->ddev.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
 125int 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
 144void *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_PRIV)
 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);
 164fallback:
 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
 178void 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
 186void 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_PRIV)
 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
 209void 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
 218struct qxl_bo *qxl_bo_ref(struct qxl_bo *bo)
 219{
 220        drm_gem_object_reference(&bo->gem_base);
 221        return bo;
 222}
 223
 224static int __qxl_bo_pin(struct qxl_bo *bo, u32 domain, u64 *gpu_addr)
 225{
 226        struct drm_device *ddev = bo->gem_base.dev;
 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(ddev->dev, "%p pin failed\n", bo);
 244        return r;
 245}
 246
 247static int __qxl_bo_unpin(struct qxl_bo *bo)
 248{
 249        struct drm_device *ddev = bo->gem_base.dev;
 250        int r, i;
 251
 252        if (!bo->pin_count) {
 253                dev_warn(ddev->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(ddev->dev, "%p validate failed for unpin\n", bo);
 264        return r;
 265}
 266
 267
 268/*
 269 * Reserve the BO before pinning the object.  If the BO was reserved
 270 * beforehand, use the internal version directly __qxl_bo_pin.
 271 *
 272 */
 273int qxl_bo_pin(struct qxl_bo *bo, u32 domain, u64 *gpu_addr)
 274{
 275        int r;
 276
 277        r = qxl_bo_reserve(bo, false);
 278        if (r)
 279                return r;
 280
 281        r = __qxl_bo_pin(bo, bo->type, NULL);
 282        qxl_bo_unreserve(bo);
 283        return r;
 284}
 285
 286/*
 287 * Reserve the BO before pinning the object.  If the BO was reserved
 288 * beforehand, use the internal version directly __qxl_bo_unpin.
 289 *
 290 */
 291int qxl_bo_unpin(struct qxl_bo *bo)
 292{
 293        int r;
 294
 295        r = qxl_bo_reserve(bo, false);
 296        if (r)
 297                return r;
 298
 299        r = __qxl_bo_unpin(bo);
 300        qxl_bo_unreserve(bo);
 301        return r;
 302}
 303
 304void qxl_bo_force_delete(struct qxl_device *qdev)
 305{
 306        struct qxl_bo *bo, *n;
 307
 308        if (list_empty(&qdev->gem.objects))
 309                return;
 310        dev_err(qdev->ddev.dev, "Userspace still has active objects !\n");
 311        list_for_each_entry_safe(bo, n, &qdev->gem.objects, list) {
 312                dev_err(qdev->ddev.dev, "%p %p %lu %lu force free\n",
 313                        &bo->gem_base, bo, (unsigned long)bo->gem_base.size,
 314                        *((unsigned long *)&bo->gem_base.refcount));
 315                mutex_lock(&qdev->gem.mutex);
 316                list_del_init(&bo->list);
 317                mutex_unlock(&qdev->gem.mutex);
 318                /* this should unref the ttm bo */
 319                drm_gem_object_unreference_unlocked(&bo->gem_base);
 320        }
 321}
 322
 323int qxl_bo_init(struct qxl_device *qdev)
 324{
 325        return qxl_ttm_init(qdev);
 326}
 327
 328void qxl_bo_fini(struct qxl_device *qdev)
 329{
 330        qxl_ttm_fini(qdev);
 331}
 332
 333int qxl_bo_check_id(struct qxl_device *qdev, struct qxl_bo *bo)
 334{
 335        int ret;
 336        if (bo->type == QXL_GEM_DOMAIN_SURFACE && bo->surface_id == 0) {
 337                /* allocate a surface id for this surface now */
 338                ret = qxl_surface_id_alloc(qdev, bo);
 339                if (ret)
 340                        return ret;
 341
 342                ret = qxl_hw_surface_alloc(qdev, bo, NULL);
 343                if (ret)
 344                        return ret;
 345        }
 346        return 0;
 347}
 348
 349int qxl_surf_evict(struct qxl_device *qdev)
 350{
 351        return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_PRIV);
 352}
 353
 354int qxl_vram_evict(struct qxl_device *qdev)
 355{
 356        return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_VRAM);
 357}
 358