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