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
  71struct qxl_reloc_info {
  72        int type;
  73        struct qxl_bo *dst_bo;
  74        uint32_t dst_offset;
  75        struct qxl_bo *src_bo;
  76        int src_offset;
  77};
  78
  79/*
  80 * dst must be validated, i.e. whole bo on vram/surfacesram (right now all bo's
  81 * are on vram).
  82 * *(dst + dst_off) = qxl_bo_physical_address(src, src_off)
  83 */
  84static void
  85apply_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
  86{
  87        void *reloc_page;
  88        reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
  89        *(uint64_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = qxl_bo_physical_address(qdev,
  90                                                                                              info->src_bo,
  91                                                                                              info->src_offset);
  92        qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
  93}
  94
  95static void
  96apply_surf_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
  97{
  98        uint32_t id = 0;
  99        void *reloc_page;
 100
 101        if (info->src_bo && !info->src_bo->is_primary)
 102                id = info->src_bo->surface_id;
 103
 104        reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
 105        *(uint32_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = id;
 106        qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
 107}
 108
 109/* return holding the reference to this object */
 110static struct qxl_bo *qxlhw_handle_to_bo(struct qxl_device *qdev,
 111                                         struct drm_file *file_priv, uint64_t handle,
 112                                         struct qxl_release *release)
 113{
 114        struct drm_gem_object *gobj;
 115        struct qxl_bo *qobj;
 116        int ret;
 117
 118        gobj = drm_gem_object_lookup(qdev->ddev, file_priv, handle);
 119        if (!gobj)
 120                return NULL;
 121
 122        qobj = gem_to_qxl_bo(gobj);
 123
 124        ret = qxl_release_list_add(release, qobj);
 125        if (ret)
 126                return NULL;
 127
 128        return qobj;
 129}
 130
 131/*
 132 * Usage of execbuffer:
 133 * Relocations need to take into account the full QXLDrawable size.
 134 * However, the command as passed from user space must *not* contain the initial
 135 * QXLReleaseInfo struct (first XXX bytes)
 136 */
 137static int qxl_process_single_command(struct qxl_device *qdev,
 138                                      struct drm_qxl_command *cmd,
 139                                      struct drm_file *file_priv)
 140{
 141        struct qxl_reloc_info *reloc_info;
 142        int release_type;
 143        struct qxl_release *release;
 144        struct qxl_bo *cmd_bo;
 145        void *fb_cmd;
 146        int i, j, ret, num_relocs;
 147        int unwritten;
 148
 149        switch (cmd->type) {
 150        case QXL_CMD_DRAW:
 151                release_type = QXL_RELEASE_DRAWABLE;
 152                break;
 153        case QXL_CMD_SURFACE:
 154        case QXL_CMD_CURSOR:
 155        default:
 156                DRM_DEBUG("Only draw commands in execbuffers\n");
 157                return -EINVAL;
 158                break;
 159        }
 160
 161        if (cmd->command_size > PAGE_SIZE - sizeof(union qxl_release_info))
 162                return -EINVAL;
 163
 164        if (!access_ok(VERIFY_READ,
 165                       (void *)(unsigned long)cmd->command,
 166                       cmd->command_size))
 167                return -EFAULT;
 168
 169        reloc_info = kmalloc(sizeof(struct qxl_reloc_info) * cmd->relocs_num, GFP_KERNEL);
 170        if (!reloc_info)
 171                return -ENOMEM;
 172
 173        ret = qxl_alloc_release_reserved(qdev,
 174                                         sizeof(union qxl_release_info) +
 175                                         cmd->command_size,
 176                                         release_type,
 177                                         &release,
 178                                         &cmd_bo);
 179        if (ret)
 180                goto out_free_reloc;
 181
 182        /* TODO copy slow path code from i915 */
 183        fb_cmd = qxl_bo_kmap_atomic_page(qdev, cmd_bo, (release->release_offset & PAGE_SIZE));
 184        unwritten = __copy_from_user_inatomic_nocache(fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_SIZE), (void *)(unsigned long)cmd->command, cmd->command_size);
 185
 186        {
 187                struct qxl_drawable *draw = fb_cmd;
 188                draw->mm_time = qdev->rom->mm_clock;
 189        }
 190
 191        qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd);
 192        if (unwritten) {
 193                DRM_ERROR("got unwritten %d\n", unwritten);
 194                ret = -EFAULT;
 195                goto out_free_release;
 196        }
 197
 198        /* fill out reloc info structs */
 199        num_relocs = 0;
 200        for (i = 0; i < cmd->relocs_num; ++i) {
 201                struct drm_qxl_reloc reloc;
 202
 203                if (copy_from_user(&reloc,
 204                                       &((struct drm_qxl_reloc *)(uintptr_t)cmd->relocs)[i],
 205                                       sizeof(reloc))) {
 206                        ret = -EFAULT;
 207                        goto out_free_bos;
 208                }
 209
 210                /* add the bos to the list of bos to validate -
 211                   need to validate first then process relocs? */
 212                if (reloc.reloc_type != QXL_RELOC_TYPE_BO && reloc.reloc_type != QXL_RELOC_TYPE_SURF) {
 213                        DRM_DEBUG("unknown reloc type %d\n", reloc_info[i].type);
 214
 215                        ret = -EINVAL;
 216                        goto out_free_bos;
 217                }
 218                reloc_info[i].type = reloc.reloc_type;
 219
 220                if (reloc.dst_handle) {
 221                        reloc_info[i].dst_bo = qxlhw_handle_to_bo(qdev, file_priv,
 222                                                                  reloc.dst_handle, release);
 223                        if (!reloc_info[i].dst_bo) {
 224                                ret = -EINVAL;
 225                                reloc_info[i].src_bo = NULL;
 226                                goto out_free_bos;
 227                        }
 228                        reloc_info[i].dst_offset = reloc.dst_offset;
 229                } else {
 230                        reloc_info[i].dst_bo = cmd_bo;
 231                        reloc_info[i].dst_offset = reloc.dst_offset + release->release_offset;
 232                }
 233                num_relocs++;
 234
 235                /* reserve and validate the reloc dst bo */
 236                if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle > 0) {
 237                        reloc_info[i].src_bo =
 238                                qxlhw_handle_to_bo(qdev, file_priv,
 239                                                   reloc.src_handle, release);
 240                        if (!reloc_info[i].src_bo) {
 241                                if (reloc_info[i].dst_bo != cmd_bo)
 242                                        drm_gem_object_unreference_unlocked(&reloc_info[i].dst_bo->gem_base);
 243                                ret = -EINVAL;
 244                                goto out_free_bos;
 245                        }
 246                        reloc_info[i].src_offset = reloc.src_offset;
 247                } else {
 248                        reloc_info[i].src_bo = NULL;
 249                        reloc_info[i].src_offset = 0;
 250                }
 251        }
 252
 253        /* validate all buffers */
 254        ret = qxl_release_reserve_list(release, false);
 255        if (ret)
 256                goto out_free_bos;
 257
 258        for (i = 0; i < cmd->relocs_num; ++i) {
 259                if (reloc_info[i].type == QXL_RELOC_TYPE_BO)
 260                        apply_reloc(qdev, &reloc_info[i]);
 261                else if (reloc_info[i].type == QXL_RELOC_TYPE_SURF)
 262                        apply_surf_reloc(qdev, &reloc_info[i]);
 263        }
 264
 265        ret = qxl_push_command_ring_release(qdev, release, cmd->type, true);
 266        if (ret)
 267                qxl_release_backoff_reserve_list(release);
 268        else
 269                qxl_release_fence_buffer_objects(release);
 270
 271out_free_bos:
 272        for (j = 0; j < num_relocs; j++) {
 273                if (reloc_info[j].dst_bo != cmd_bo)
 274                        drm_gem_object_unreference_unlocked(&reloc_info[j].dst_bo->gem_base);
 275                if (reloc_info[j].src_bo && reloc_info[j].src_bo != cmd_bo)
 276                        drm_gem_object_unreference_unlocked(&reloc_info[j].src_bo->gem_base);
 277        }
 278out_free_release:
 279        if (ret)
 280                qxl_release_free(qdev, release);
 281out_free_reloc:
 282        kfree(reloc_info);
 283        return ret;
 284}
 285
 286static int qxl_execbuffer_ioctl(struct drm_device *dev, void *data,
 287                                struct drm_file *file_priv)
 288{
 289        struct qxl_device *qdev = dev->dev_private;
 290        struct drm_qxl_execbuffer *execbuffer = data;
 291        struct drm_qxl_command user_cmd;
 292        int cmd_num;
 293        int ret;
 294
 295        for (cmd_num = 0; cmd_num < execbuffer->commands_num; ++cmd_num) {
 296
 297                struct drm_qxl_command *commands =
 298                        (struct drm_qxl_command *)(uintptr_t)execbuffer->commands;
 299
 300                if (copy_from_user(&user_cmd, &commands[cmd_num],
 301                                       sizeof(user_cmd)))
 302                        return -EFAULT;
 303
 304                ret = qxl_process_single_command(qdev, &user_cmd, file_priv);
 305                if (ret)
 306                        return ret;
 307        }
 308        return 0;
 309}
 310
 311static int qxl_update_area_ioctl(struct drm_device *dev, void *data,
 312                                 struct drm_file *file)
 313{
 314        struct qxl_device *qdev = dev->dev_private;
 315        struct drm_qxl_update_area *update_area = data;
 316        struct qxl_rect area = {.left = update_area->left,
 317                                .top = update_area->top,
 318                                .right = update_area->right,
 319                                .bottom = update_area->bottom};
 320        int ret;
 321        struct drm_gem_object *gobj = NULL;
 322        struct qxl_bo *qobj = NULL;
 323
 324        if (update_area->left >= update_area->right ||
 325            update_area->top >= update_area->bottom)
 326                return -EINVAL;
 327
 328        gobj = drm_gem_object_lookup(dev, file, update_area->handle);
 329        if (gobj == NULL)
 330                return -ENOENT;
 331
 332        qobj = gem_to_qxl_bo(gobj);
 333
 334        ret = qxl_bo_reserve(qobj, false);
 335        if (ret)
 336                goto out;
 337
 338        if (!qobj->pin_count) {
 339                qxl_ttm_placement_from_domain(qobj, qobj->type, false);
 340                ret = ttm_bo_validate(&qobj->tbo, &qobj->placement,
 341                                      true, false);
 342                if (unlikely(ret))
 343                        goto out;
 344        }
 345
 346        ret = qxl_bo_check_id(qdev, qobj);
 347        if (ret)
 348                goto out2;
 349        if (!qobj->surface_id)
 350                DRM_ERROR("got update area for surface with no id %d\n", update_area->handle);
 351        ret = qxl_io_update_area(qdev, qobj, &area);
 352
 353out2:
 354        qxl_bo_unreserve(qobj);
 355
 356out:
 357        drm_gem_object_unreference_unlocked(gobj);
 358        return ret;
 359}
 360
 361static int qxl_getparam_ioctl(struct drm_device *dev, void *data,
 362                       struct drm_file *file_priv)
 363{
 364        struct qxl_device *qdev = dev->dev_private;
 365        struct drm_qxl_getparam *param = data;
 366
 367        switch (param->param) {
 368        case QXL_PARAM_NUM_SURFACES:
 369                param->value = qdev->rom->n_surfaces;
 370                break;
 371        case QXL_PARAM_MAX_RELOCS:
 372                param->value = QXL_MAX_RES;
 373                break;
 374        default:
 375                return -EINVAL;
 376        }
 377        return 0;
 378}
 379
 380static int qxl_clientcap_ioctl(struct drm_device *dev, void *data,
 381                                  struct drm_file *file_priv)
 382{
 383        struct qxl_device *qdev = dev->dev_private;
 384        struct drm_qxl_clientcap *param = data;
 385        int byte, idx;
 386
 387        byte = param->index / 8;
 388        idx = param->index % 8;
 389
 390        if (qdev->pdev->revision < 4)
 391                return -ENOSYS;
 392
 393        if (byte >= 58)
 394                return -ENOSYS;
 395
 396        if (qdev->rom->client_capabilities[byte] & (1 << idx))
 397                return 0;
 398        return -ENOSYS;
 399}
 400
 401static int qxl_alloc_surf_ioctl(struct drm_device *dev, void *data,
 402                                struct drm_file *file)
 403{
 404        struct qxl_device *qdev = dev->dev_private;
 405        struct drm_qxl_alloc_surf *param = data;
 406        struct qxl_bo *qobj;
 407        int handle;
 408        int ret;
 409        int size, actual_stride;
 410        struct qxl_surface surf;
 411
 412        /* work out size allocate bo with handle */
 413        actual_stride = param->stride < 0 ? -param->stride : param->stride;
 414        size = actual_stride * param->height + actual_stride;
 415
 416        surf.format = param->format;
 417        surf.width = param->width;
 418        surf.height = param->height;
 419        surf.stride = param->stride;
 420        surf.data = 0;
 421
 422        ret = qxl_gem_object_create_with_handle(qdev, file,
 423                                                QXL_GEM_DOMAIN_SURFACE,
 424                                                size,
 425                                                &surf,
 426                                                &qobj, &handle);
 427        if (ret) {
 428                DRM_ERROR("%s: failed to create gem ret=%d\n",
 429                          __func__, ret);
 430                return -ENOMEM;
 431        } else
 432                param->handle = handle;
 433        return ret;
 434}
 435
 436const struct drm_ioctl_desc qxl_ioctls[] = {
 437        DRM_IOCTL_DEF_DRV(QXL_ALLOC, qxl_alloc_ioctl, DRM_AUTH|DRM_UNLOCKED),
 438
 439        DRM_IOCTL_DEF_DRV(QXL_MAP, qxl_map_ioctl, DRM_AUTH|DRM_UNLOCKED),
 440
 441        DRM_IOCTL_DEF_DRV(QXL_EXECBUFFER, qxl_execbuffer_ioctl,
 442                                                        DRM_AUTH|DRM_UNLOCKED),
 443        DRM_IOCTL_DEF_DRV(QXL_UPDATE_AREA, qxl_update_area_ioctl,
 444                                                        DRM_AUTH|DRM_UNLOCKED),
 445        DRM_IOCTL_DEF_DRV(QXL_GETPARAM, qxl_getparam_ioctl,
 446                                                        DRM_AUTH|DRM_UNLOCKED),
 447        DRM_IOCTL_DEF_DRV(QXL_CLIENTCAP, qxl_clientcap_ioctl,
 448                                                        DRM_AUTH|DRM_UNLOCKED),
 449
 450        DRM_IOCTL_DEF_DRV(QXL_ALLOC_SURF, qxl_alloc_surf_ioctl,
 451                          DRM_AUTH|DRM_UNLOCKED),
 452};
 453
 454int qxl_max_ioctls = ARRAY_SIZE(qxl_ioctls);
 455