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
  89        reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
  90        *(uint64_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = qxl_bo_physical_address(qdev,
  91                                                                                              info->src_bo,
  92                                                                                              info->src_offset);
  93        qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
  94}
  95
  96static void
  97apply_surf_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
  98{
  99        uint32_t id = 0;
 100        void *reloc_page;
 101
 102        if (info->src_bo && !info->src_bo->is_primary)
 103                id = info->src_bo->surface_id;
 104
 105        reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
 106        *(uint32_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = id;
 107        qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
 108}
 109
 110/* return holding the reference to this object */
 111static int qxlhw_handle_to_bo(struct drm_file *file_priv, uint64_t handle,
 112                              struct qxl_release *release, struct qxl_bo **qbo_p)
 113{
 114        struct drm_gem_object *gobj;
 115        struct qxl_bo *qobj;
 116        int ret;
 117
 118        gobj = drm_gem_object_lookup(file_priv, handle);
 119        if (!gobj)
 120                return -EINVAL;
 121
 122        qobj = gem_to_qxl_bo(gobj);
 123
 124        ret = qxl_release_list_add(release, qobj);
 125        drm_gem_object_put_unlocked(gobj);
 126        if (ret)
 127                return ret;
 128
 129        *qbo_p = qobj;
 130        return 0;
 131}
 132
 133/*
 134 * Usage of execbuffer:
 135 * Relocations need to take into account the full QXLDrawable size.
 136 * However, the command as passed from user space must *not* contain the initial
 137 * QXLReleaseInfo struct (first XXX bytes)
 138 */
 139static int qxl_process_single_command(struct qxl_device *qdev,
 140                                      struct drm_qxl_command *cmd,
 141                                      struct drm_file *file_priv)
 142{
 143        struct qxl_reloc_info *reloc_info;
 144        int release_type;
 145        struct qxl_release *release;
 146        struct qxl_bo *cmd_bo;
 147        void *fb_cmd;
 148        int i, ret, num_relocs;
 149        int unwritten;
 150
 151        switch (cmd->type) {
 152        case QXL_CMD_DRAW:
 153                release_type = QXL_RELEASE_DRAWABLE;
 154                break;
 155        case QXL_CMD_SURFACE:
 156        case QXL_CMD_CURSOR:
 157        default:
 158                DRM_DEBUG("Only draw commands in execbuffers\n");
 159                return -EINVAL;
 160                break;
 161        }
 162
 163        if (cmd->command_size > PAGE_SIZE - sizeof(union qxl_release_info))
 164                return -EINVAL;
 165
 166        if (!access_ok(VERIFY_READ,
 167                       u64_to_user_ptr(cmd->command),
 168                       cmd->command_size))
 169                return -EFAULT;
 170
 171        reloc_info = kmalloc_array(cmd->relocs_num,
 172                                   sizeof(struct qxl_reloc_info), GFP_KERNEL);
 173        if (!reloc_info)
 174                return -ENOMEM;
 175
 176        ret = qxl_alloc_release_reserved(qdev,
 177                                         sizeof(union qxl_release_info) +
 178                                         cmd->command_size,
 179                                         release_type,
 180                                         &release,
 181                                         &cmd_bo);
 182        if (ret)
 183                goto out_free_reloc;
 184
 185        /* TODO copy slow path code from i915 */
 186        fb_cmd = qxl_bo_kmap_atomic_page(qdev, cmd_bo, (release->release_offset & PAGE_MASK));
 187        unwritten = __copy_from_user_inatomic_nocache
 188                (fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_MASK),
 189                 u64_to_user_ptr(cmd->command), cmd->command_size);
 190
 191        {
 192                struct qxl_drawable *draw = fb_cmd;
 193
 194                draw->mm_time = qdev->rom->mm_clock;
 195        }
 196
 197        qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd);
 198        if (unwritten) {
 199                DRM_ERROR("got unwritten %d\n", unwritten);
 200                ret = -EFAULT;
 201                goto out_free_release;
 202        }
 203
 204        /* fill out reloc info structs */
 205        num_relocs = 0;
 206        for (i = 0; i < cmd->relocs_num; ++i) {
 207                struct drm_qxl_reloc reloc;
 208                struct drm_qxl_reloc __user *u = u64_to_user_ptr(cmd->relocs);
 209
 210                if (copy_from_user(&reloc, u + i, sizeof(reloc))) {
 211                        ret = -EFAULT;
 212                        goto out_free_bos;
 213                }
 214
 215                /* add the bos to the list of bos to validate -
 216                   need to validate first then process relocs? */
 217                if (reloc.reloc_type != QXL_RELOC_TYPE_BO && reloc.reloc_type != QXL_RELOC_TYPE_SURF) {
 218                        DRM_DEBUG("unknown reloc type %d\n", reloc.reloc_type);
 219
 220                        ret = -EINVAL;
 221                        goto out_free_bos;
 222                }
 223                reloc_info[i].type = reloc.reloc_type;
 224
 225                if (reloc.dst_handle) {
 226                        ret = qxlhw_handle_to_bo(file_priv, reloc.dst_handle, release,
 227                                                 &reloc_info[i].dst_bo);
 228                        if (ret)
 229                                goto out_free_bos;
 230                        reloc_info[i].dst_offset = reloc.dst_offset;
 231                } else {
 232                        reloc_info[i].dst_bo = cmd_bo;
 233                        reloc_info[i].dst_offset = reloc.dst_offset + release->release_offset;
 234                }
 235                num_relocs++;
 236
 237                /* reserve and validate the reloc dst bo */
 238                if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle) {
 239                        ret = qxlhw_handle_to_bo(file_priv, reloc.src_handle, release,
 240                                                 &reloc_info[i].src_bo);
 241                        if (ret)
 242                                goto out_free_bos;
 243                        reloc_info[i].src_offset = reloc.src_offset;
 244                } else {
 245                        reloc_info[i].src_bo = NULL;
 246                        reloc_info[i].src_offset = 0;
 247                }
 248        }
 249
 250        /* validate all buffers */
 251        ret = qxl_release_reserve_list(release, false);
 252        if (ret)
 253                goto out_free_bos;
 254
 255        for (i = 0; i < cmd->relocs_num; ++i) {
 256                if (reloc_info[i].type == QXL_RELOC_TYPE_BO)
 257                        apply_reloc(qdev, &reloc_info[i]);
 258                else if (reloc_info[i].type == QXL_RELOC_TYPE_SURF)
 259                        apply_surf_reloc(qdev, &reloc_info[i]);
 260        }
 261
 262        ret = qxl_push_command_ring_release(qdev, release, cmd->type, true);
 263        if (ret)
 264                qxl_release_backoff_reserve_list(release);
 265        else
 266                qxl_release_fence_buffer_objects(release);
 267
 268out_free_bos:
 269out_free_release:
 270        if (ret)
 271                qxl_release_free(qdev, release);
 272out_free_reloc:
 273        kfree(reloc_info);
 274        return ret;
 275}
 276
 277static int qxl_execbuffer_ioctl(struct drm_device *dev, void *data,
 278                                struct drm_file *file_priv)
 279{
 280        struct qxl_device *qdev = dev->dev_private;
 281        struct drm_qxl_execbuffer *execbuffer = data;
 282        struct drm_qxl_command user_cmd;
 283        int cmd_num;
 284        int ret;
 285
 286        for (cmd_num = 0; cmd_num < execbuffer->commands_num; ++cmd_num) {
 287
 288                struct drm_qxl_command __user *commands =
 289                        u64_to_user_ptr(execbuffer->commands);
 290
 291                if (copy_from_user(&user_cmd, commands + cmd_num,
 292                                       sizeof(user_cmd)))
 293                        return -EFAULT;
 294
 295                ret = qxl_process_single_command(qdev, &user_cmd, file_priv);
 296                if (ret)
 297                        return ret;
 298        }
 299        return 0;
 300}
 301
 302static int qxl_update_area_ioctl(struct drm_device *dev, void *data,
 303                                 struct drm_file *file)
 304{
 305        struct qxl_device *qdev = dev->dev_private;
 306        struct drm_qxl_update_area *update_area = data;
 307        struct qxl_rect area = {.left = update_area->left,
 308                                .top = update_area->top,
 309                                .right = update_area->right,
 310                                .bottom = update_area->bottom};
 311        int ret;
 312        struct drm_gem_object *gobj = NULL;
 313        struct qxl_bo *qobj = NULL;
 314        struct ttm_operation_ctx ctx = { true, false };
 315
 316        if (update_area->left >= update_area->right ||
 317            update_area->top >= update_area->bottom)
 318                return -EINVAL;
 319
 320        gobj = drm_gem_object_lookup(file, update_area->handle);
 321        if (gobj == NULL)
 322                return -ENOENT;
 323
 324        qobj = gem_to_qxl_bo(gobj);
 325
 326        ret = qxl_bo_reserve(qobj, false);
 327        if (ret)
 328                goto out;
 329
 330        if (!qobj->pin_count) {
 331                qxl_ttm_placement_from_domain(qobj, qobj->type, false);
 332                ret = ttm_bo_validate(&qobj->tbo, &qobj->placement, &ctx);
 333                if (unlikely(ret))
 334                        goto out;
 335        }
 336
 337        ret = qxl_bo_check_id(qdev, qobj);
 338        if (ret)
 339                goto out2;
 340        if (!qobj->surface_id)
 341                DRM_ERROR("got update area for surface with no id %d\n", update_area->handle);
 342        ret = qxl_io_update_area(qdev, qobj, &area);
 343
 344out2:
 345        qxl_bo_unreserve(qobj);
 346
 347out:
 348        drm_gem_object_put_unlocked(gobj);
 349        return ret;
 350}
 351
 352static int qxl_getparam_ioctl(struct drm_device *dev, void *data,
 353                       struct drm_file *file_priv)
 354{
 355        struct qxl_device *qdev = dev->dev_private;
 356        struct drm_qxl_getparam *param = data;
 357
 358        switch (param->param) {
 359        case QXL_PARAM_NUM_SURFACES:
 360                param->value = qdev->rom->n_surfaces;
 361                break;
 362        case QXL_PARAM_MAX_RELOCS:
 363                param->value = QXL_MAX_RES;
 364                break;
 365        default:
 366                return -EINVAL;
 367        }
 368        return 0;
 369}
 370
 371static int qxl_clientcap_ioctl(struct drm_device *dev, void *data,
 372                                  struct drm_file *file_priv)
 373{
 374        struct qxl_device *qdev = dev->dev_private;
 375        struct drm_qxl_clientcap *param = data;
 376        int byte, idx;
 377
 378        byte = param->index / 8;
 379        idx = param->index % 8;
 380
 381        if (dev->pdev->revision < 4)
 382                return -ENOSYS;
 383
 384        if (byte >= 58)
 385                return -ENOSYS;
 386
 387        if (qdev->rom->client_capabilities[byte] & (1 << idx))
 388                return 0;
 389        return -ENOSYS;
 390}
 391
 392static int qxl_alloc_surf_ioctl(struct drm_device *dev, void *data,
 393                                struct drm_file *file)
 394{
 395        struct qxl_device *qdev = dev->dev_private;
 396        struct drm_qxl_alloc_surf *param = data;
 397        struct qxl_bo *qobj;
 398        int handle;
 399        int ret;
 400        int size, actual_stride;
 401        struct qxl_surface surf;
 402
 403        /* work out size allocate bo with handle */
 404        actual_stride = param->stride < 0 ? -param->stride : param->stride;
 405        size = actual_stride * param->height + actual_stride;
 406
 407        surf.format = param->format;
 408        surf.width = param->width;
 409        surf.height = param->height;
 410        surf.stride = param->stride;
 411        surf.data = 0;
 412
 413        ret = qxl_gem_object_create_with_handle(qdev, file,
 414                                                QXL_GEM_DOMAIN_SURFACE,
 415                                                size,
 416                                                &surf,
 417                                                &qobj, &handle);
 418        if (ret) {
 419                DRM_ERROR("%s: failed to create gem ret=%d\n",
 420                          __func__, ret);
 421                return -ENOMEM;
 422        } else
 423                param->handle = handle;
 424        return ret;
 425}
 426
 427const struct drm_ioctl_desc qxl_ioctls[] = {
 428        DRM_IOCTL_DEF_DRV(QXL_ALLOC, qxl_alloc_ioctl, DRM_AUTH),
 429
 430        DRM_IOCTL_DEF_DRV(QXL_MAP, qxl_map_ioctl, DRM_AUTH),
 431
 432        DRM_IOCTL_DEF_DRV(QXL_EXECBUFFER, qxl_execbuffer_ioctl,
 433                                                        DRM_AUTH),
 434        DRM_IOCTL_DEF_DRV(QXL_UPDATE_AREA, qxl_update_area_ioctl,
 435                                                        DRM_AUTH),
 436        DRM_IOCTL_DEF_DRV(QXL_GETPARAM, qxl_getparam_ioctl,
 437                                                        DRM_AUTH),
 438        DRM_IOCTL_DEF_DRV(QXL_CLIENTCAP, qxl_clientcap_ioctl,
 439                                                        DRM_AUTH),
 440
 441        DRM_IOCTL_DEF_DRV(QXL_ALLOC_SURF, qxl_alloc_surf_ioctl,
 442                          DRM_AUTH),
 443};
 444
 445int qxl_max_ioctls = ARRAY_SIZE(qxl_ioctls);
 446