LXR linux/drivers/gpu/drm/qxl/qxl

   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/*
  30 * TODO: allocating a new gem(in qxl_bo) for each request.
  31 * This is wasteful since bo's are page aligned.
  32 */
  33static int qxl_alloc_ioctl(struct drm_device *dev, void *data,
  34                           struct drm_file *file_priv)
  35{
  36        struct qxl_device *qdev = dev->dev_private;
  37        struct drm_qxl_alloc *qxl_alloc = data;
  38        int ret;
  39        struct qxl_bo *qobj;
  40        uint32_t handle;
  41        u32 domain = QXL_GEM_DOMAIN_VRAM;
  42
  43        if (qxl_alloc->size == 0) {
  44                DRM_ERROR("invalid size %d\n", qxl_alloc->size);
  45                return -EINVAL;
  46        }
  47        ret = qxl_gem_object_create_with_handle(qdev, file_priv,
  48                                                domain,
  49                                                qxl_alloc->size,
  50                                                NULL,
  51                                                &qobj, &handle);
  52        if (ret) {
  53                DRM_ERROR("%s: failed to create gem ret=%d\n",
  54                          __func__, ret);
  55                return -ENOMEM;
  56        }
  57        qxl_alloc->handle = handle;
  58        return 0;
  59}
  60
  61static int qxl_map_ioctl(struct drm_device *dev, void *data,
  62                         struct drm_file *file_priv)
  63{
  64        struct qxl_device *qdev = dev->dev_private;
  65        struct drm_qxl_map *qxl_map = data;
  66
  67        return qxl_mode_dumb_mmap(file_priv, qdev->ddev, qxl_map->handle,
  68                                  &qxl_map->offset);
  69}
  70
  71/*
  72 * dst must be validated, i.e. whole bo on vram/surfacesram (right now all bo's
  73 * are on vram).
  74 * *(dst + dst_off) = qxl_bo_physical_address(src, src_off)
  75 */
  76static void
  77apply_reloc(struct qxl_device *qdev, struct qxl_bo *dst, uint64_t dst_off,
  78            struct qxl_bo *src, uint64_t src_off)
  79{
  80        void *reloc_page;
  81
  82        reloc_page = qxl_bo_kmap_atomic_page(qdev, dst, dst_off & PAGE_MASK);
  83        *(uint64_t *)(reloc_page + (dst_off & ~PAGE_MASK)) = qxl_bo_physical_address(qdev,
  84                                                                     src, src_off);
  85        qxl_bo_kunmap_atomic_page(qdev, dst, reloc_page);
  86}
  87
  88static void
  89apply_surf_reloc(struct qxl_device *qdev, struct qxl_bo *dst, uint64_t dst_off,
  90                 struct qxl_bo *src)
  91{
  92        uint32_t id = 0;
  93        void *reloc_page;
  94
  95        if (src && !src->is_primary)
  96                id = src->surface_id;
  97
  98        reloc_page = qxl_bo_kmap_atomic_page(qdev, dst, dst_off & PAGE_MASK);
  99        *(uint32_t *)(reloc_page + (dst_off & ~PAGE_MASK)) = id;
 100        qxl_bo_kunmap_atomic_page(qdev, dst, reloc_page);
 101}
 102
 103/* return holding the reference to this object */
 104static struct qxl_bo *qxlhw_handle_to_bo(struct qxl_device *qdev,
 105                                         struct drm_file *file_priv, uint64_t handle,
 106                                         struct qxl_reloc_list *reloc_list)
 107{
 108        struct drm_gem_object *gobj;
 109        struct qxl_bo *qobj;
 110        int ret;
 111
 112        gobj = drm_gem_object_lookup(qdev->ddev, file_priv, handle);
 113        if (!gobj) {
 114                DRM_ERROR("bad bo handle %lld\n", handle);
 115                return NULL;
 116        }
 117        qobj = gem_to_qxl_bo(gobj);
 118
 119        ret = qxl_bo_list_add(reloc_list, qobj);
 120        if (ret)
 121                return NULL;
 122
 123        return qobj;
 124}
 125
 126/*
 127 * Usage of execbuffer:
 128 * Relocations need to take into account the full QXLDrawable size.
 129 * However, the command as passed from user space must *not* contain the initial
 130 * QXLReleaseInfo struct (first XXX bytes)
 131 */
 132static int qxl_execbuffer_ioctl(struct drm_device *dev, void *data,
 133                                struct drm_file *file_priv)
 134{
 135        struct qxl_device *qdev = dev->dev_private;
 136        struct drm_qxl_execbuffer *execbuffer = data;
 137        struct drm_qxl_command user_cmd;
 138        int cmd_num;
 139        struct qxl_bo *reloc_src_bo;
 140        struct qxl_bo *reloc_dst_bo;
 141        struct drm_qxl_reloc reloc;
 142        void *fb_cmd;
 143        int i, ret;
 144        struct qxl_reloc_list reloc_list;
 145        int unwritten;
 146        uint32_t reloc_dst_offset;
 147        INIT_LIST_HEAD(&reloc_list.bos);
 148
 149        for (cmd_num = 0; cmd_num < execbuffer->commands_num; ++cmd_num) {
 150                struct qxl_release *release;
 151                struct qxl_bo *cmd_bo;
 152                int release_type;
 153                struct drm_qxl_command *commands =
 154                        (struct drm_qxl_command *)(uintptr_t)execbuffer->commands;
 155
 156                if (DRM_COPY_FROM_USER(&user_cmd, &commands[cmd_num],
 157                                       sizeof(user_cmd)))
 158                        return -EFAULT;
 159                switch (user_cmd.type) {
 160                case QXL_CMD_DRAW:
 161                        release_type = QXL_RELEASE_DRAWABLE;
 162                        break;
 163                case QXL_CMD_SURFACE:
 164                case QXL_CMD_CURSOR:
 165                default:
 166                        DRM_DEBUG("Only draw commands in execbuffers\n");
 167                        return -EINVAL;
 168                        break;
 169                }
 170
 171                if (user_cmd.command_size > PAGE_SIZE - sizeof(union qxl_release_info))
 172                        return -EINVAL;
 173
 174                if (!access_ok(VERIFY_READ,
 175                               (void *)(unsigned long)user_cmd.command,
 176                               user_cmd.command_size))
 177                        return -EFAULT;
 178
 179                ret = qxl_alloc_release_reserved(qdev,
 180                                                 sizeof(union qxl_release_info) +
 181                                                 user_cmd.command_size,
 182                                                 release_type,
 183                                                 &release,
 184                                                 &cmd_bo);
 185                if (ret)
 186                        return ret;
 187
 188                /* TODO copy slow path code from i915 */
 189                fb_cmd = qxl_bo_kmap_atomic_page(qdev, cmd_bo, (release->release_offset & PAGE_SIZE));
 190                unwritten = __copy_from_user_inatomic_nocache(fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_SIZE), (void *)(unsigned long)user_cmd.command, user_cmd.command_size);
 191                qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd);
 192                if (unwritten) {
 193                        DRM_ERROR("got unwritten %d\n", unwritten);
 194                        qxl_release_unreserve(qdev, release);
 195                        qxl_release_free(qdev, release);
 196                        return -EFAULT;
 197                }
 198
 199                for (i = 0 ; i < user_cmd.relocs_num; ++i) {
 200                        if (DRM_COPY_FROM_USER(&reloc,
 201                                               &((struct drm_qxl_reloc *)(uintptr_t)user_cmd.relocs)[i],
 202                                               sizeof(reloc))) {
 203                                qxl_bo_list_unreserve(&reloc_list, true);
 204                                qxl_release_unreserve(qdev, release);
 205                                qxl_release_free(qdev, release);
 206                                return -EFAULT;
 207                        }
 208
 209                        /* add the bos to the list of bos to validate -
 210                           need to validate first then process relocs? */
 211                        if (reloc.dst_handle) {
 212                                reloc_dst_bo = qxlhw_handle_to_bo(qdev, file_priv,
 213                                                                  reloc.dst_handle, &reloc_list);
 214                                if (!reloc_dst_bo) {
 215                                        qxl_bo_list_unreserve(&reloc_list, true);
 216                                        qxl_release_unreserve(qdev, release);
 217                                        qxl_release_free(qdev, release);
 218                                        return -EINVAL;
 219                                }
 220                                reloc_dst_offset = 0;
 221                        } else {
 222                                reloc_dst_bo = cmd_bo;
 223                                reloc_dst_offset = release->release_offset;
 224                        }
 225
 226                        /* reserve and validate the reloc dst bo */
 227                        if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle > 0) {
 228                                reloc_src_bo =
 229                                        qxlhw_handle_to_bo(qdev, file_priv,
 230                                                           reloc.src_handle, &reloc_list);
 231                                if (!reloc_src_bo) {
 232                                        if (reloc_dst_bo != cmd_bo)
 233                                                drm_gem_object_unreference_unlocked(&reloc_dst_bo->gem_base);
 234                                        qxl_bo_list_unreserve(&reloc_list, true);
 235                                        qxl_release_unreserve(qdev, release);
 236                                        qxl_release_free(qdev, release);
 237                                        return -EINVAL;
 238                                }
 239                        } else
 240                                reloc_src_bo = NULL;
 241                        if (reloc.reloc_type == QXL_RELOC_TYPE_BO) {
 242                                apply_reloc(qdev, reloc_dst_bo, reloc_dst_offset + reloc.dst_offset,
 243                                            reloc_src_bo, reloc.src_offset);
 244                        } else if (reloc.reloc_type == QXL_RELOC_TYPE_SURF) {
 245                                apply_surf_reloc(qdev, reloc_dst_bo, reloc_dst_offset + reloc.dst_offset, reloc_src_bo);
 246                        } else {
 247                                DRM_ERROR("unknown reloc type %d\n", reloc.reloc_type);
 248                                return -EINVAL;
 249                        }
 250
 251                        if (reloc_src_bo && reloc_src_bo != cmd_bo) {
 252                                qxl_release_add_res(qdev, release, reloc_src_bo);
 253                                drm_gem_object_unreference_unlocked(&reloc_src_bo->gem_base);
 254                        }
 255
 256                        if (reloc_dst_bo != cmd_bo)
 257                                drm_gem_object_unreference_unlocked(&reloc_dst_bo->gem_base);
 258                }
 259                qxl_fence_releaseable(qdev, release);
 260
 261                ret = qxl_push_command_ring_release(qdev, release, user_cmd.type, true);
 262                if (ret == -ERESTARTSYS) {
 263                        qxl_release_unreserve(qdev, release);
 264                        qxl_release_free(qdev, release);
 265                        qxl_bo_list_unreserve(&reloc_list, true);
 266                        return ret;
 267                }
 268                qxl_release_unreserve(qdev, release);
 269        }
 270        qxl_bo_list_unreserve(&reloc_list, 0);
 271        return 0;
 272}
 273
 274static int qxl_update_area_ioctl(struct drm_device *dev, void *data,
 275                                 struct drm_file *file)
 276{
 277        struct qxl_device *qdev = dev->dev_private;
 278        struct drm_qxl_update_area *update_area = data;
 279        struct qxl_rect area = {.left = update_area->left,
 280                                .top = update_area->top,
 281                                .right = update_area->right,
 282                                .bottom = update_area->bottom};
 283        int ret;
 284        struct drm_gem_object *gobj = NULL;
 285        struct qxl_bo *qobj = NULL;
 286
 287        if (update_area->left >= update_area->right ||
 288            update_area->top >= update_area->bottom)
 289                return -EINVAL;
 290
 291        gobj = drm_gem_object_lookup(dev, file, update_area->handle);
 292        if (gobj == NULL)
 293                return -ENOENT;
 294
 295        qobj = gem_to_qxl_bo(gobj);
 296
 297        ret = qxl_bo_reserve(qobj, false);
 298        if (ret)
 299                goto out;
 300
 301        if (!qobj->pin_count) {
 302                qxl_ttm_placement_from_domain(qobj, qobj->type);
 303                ret = ttm_bo_validate(&qobj->tbo, &qobj->placement,
 304                                      true, false);
 305                if (unlikely(ret))
 306                        goto out;
 307        }
 308
 309        ret = qxl_bo_check_id(qdev, qobj);
 310        if (ret)
 311                goto out2;
 312        if (!qobj->surface_id)
 313                DRM_ERROR("got update area for surface with no id %d\n", update_area->handle);
 314        ret = qxl_io_update_area(qdev, qobj, &area);
 315
 316out2:
 317        qxl_bo_unreserve(qobj);
 318
 319out:
 320        drm_gem_object_unreference_unlocked(gobj);
 321        return ret;
 322}
 323
 324static int qxl_getparam_ioctl(struct drm_device *dev, void *data,
 325                       struct drm_file *file_priv)
 326{
 327        struct qxl_device *qdev = dev->dev_private;
 328        struct drm_qxl_getparam *param = data;
 329
 330        switch (param->param) {
 331        case QXL_PARAM_NUM_SURFACES:
 332                param->value = qdev->rom->n_surfaces;
 333                break;
 334        case QXL_PARAM_MAX_RELOCS:
 335                param->value = QXL_MAX_RES;
 336                break;
 337        default:
 338                return -EINVAL;
 339        }
 340        return 0;
 341}
 342
 343static int qxl_clientcap_ioctl(struct drm_device *dev, void *data,
 344                                  struct drm_file *file_priv)
 345{
 346        struct qxl_device *qdev = dev->dev_private;
 347        struct drm_qxl_clientcap *param = data;
 348        int byte, idx;
 349
 350        byte = param->index / 8;
 351        idx = param->index % 8;
 352
 353        if (qdev->pdev->revision < 4)
 354                return -ENOSYS;
 355
 356        if (byte >= 58)
 357                return -ENOSYS;
 358
 359        if (qdev->rom->client_capabilities[byte] & (1 << idx))
 360                return 0;
 361        return -ENOSYS;
 362}
 363
 364static int qxl_alloc_surf_ioctl(struct drm_device *dev, void *data,
 365                                struct drm_file *file)
 366{
 367        struct qxl_device *qdev = dev->dev_private;
 368        struct drm_qxl_alloc_surf *param = data;
 369        struct qxl_bo *qobj;
 370        int handle;
 371        int ret;
 372        int size, actual_stride;
 373        struct qxl_surface surf;
 374
 375        /* work out size allocate bo with handle */
 376        actual_stride = param->stride < 0 ? -param->stride : param->stride;
 377        size = actual_stride * param->height + actual_stride;
 378
 379        surf.format = param->format;
 380        surf.width = param->width;
 381        surf.height = param->height;
 382        surf.stride = param->stride;
 383        surf.data = 0;
 384
 385        ret = qxl_gem_object_create_with_handle(qdev, file,
 386                                                QXL_GEM_DOMAIN_SURFACE,
 387                                                size,
 388                                                &surf,
 389                                                &qobj, &handle);
 390        if (ret) {
 391                DRM_ERROR("%s: failed to create gem ret=%d\n",
 392                          __func__, ret);
 393                return -ENOMEM;
 394        } else
 395                param->handle = handle;
 396        return ret;
 397}
 398
 399struct drm_ioctl_desc qxl_ioctls[] = {
 400        DRM_IOCTL_DEF_DRV(QXL_ALLOC, qxl_alloc_ioctl, DRM_AUTH|DRM_UNLOCKED),
 401
 402        DRM_IOCTL_DEF_DRV(QXL_MAP, qxl_map_ioctl, DRM_AUTH|DRM_UNLOCKED),
 403
 404        DRM_IOCTL_DEF_DRV(QXL_EXECBUFFER, qxl_execbuffer_ioctl,
 405                                                        DRM_AUTH|DRM_UNLOCKED),
 406        DRM_IOCTL_DEF_DRV(QXL_UPDATE_AREA, qxl_update_area_ioctl,
 407                                                        DRM_AUTH|DRM_UNLOCKED),
 408        DRM_IOCTL_DEF_DRV(QXL_GETPARAM, qxl_getparam_ioctl,
 409                                                        DRM_AUTH|DRM_UNLOCKED),
 410        DRM_IOCTL_DEF_DRV(QXL_CLIENTCAP, qxl_clientcap_ioctl,
 411                                                        DRM_AUTH|DRM_UNLOCKED),
 412
 413        DRM_IOCTL_DEF_DRV(QXL_ALLOC_SURF, qxl_alloc_surf_ioctl,
 414                          DRM_AUTH|DRM_UNLOCKED),
 415};
 416
 417int qxl_max_ioctls = DRM_ARRAY_SIZE(qxl_ioctls);
 418