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 <linux/pci.h>
  27#include <linux/uaccess.h>
  28
  29#include "qxl_drv.h"
  30#include "qxl_object.h"
  31
  32/*
  33 * TODO: allocating a new gem(in qxl_bo) for each request.
  34 * This is wasteful since bo's are page aligned.
  35 */
  36static int qxl_alloc_ioctl(struct drm_device *dev, void *data,
  37                           struct drm_file *file_priv)
  38{
  39        struct qxl_device *qdev = to_qxl(dev);
  40        struct drm_qxl_alloc *qxl_alloc = data;
  41        int ret;
  42        struct qxl_bo *qobj;
  43        uint32_t handle;
  44        u32 domain = QXL_GEM_DOMAIN_VRAM;
  45
  46        if (qxl_alloc->size == 0) {
  47                DRM_ERROR("invalid size %d\n", qxl_alloc->size);
  48                return -EINVAL;
  49        }
  50        ret = qxl_gem_object_create_with_handle(qdev, file_priv,
  51                                                domain,
  52                                                qxl_alloc->size,
  53                                                NULL,
  54                                                &qobj, &handle);
  55        if (ret) {
  56                DRM_ERROR("%s: failed to create gem ret=%d\n",
  57                          __func__, ret);
  58                return -ENOMEM;
  59        }
  60        qxl_alloc->handle = handle;
  61        return 0;
  62}
  63
  64static int qxl_map_ioctl(struct drm_device *dev, void *data,
  65                         struct drm_file *file_priv)
  66{
  67        struct qxl_device *qdev = to_qxl(dev);
  68        struct drm_qxl_map *qxl_map = data;
  69
  70        return drm_gem_ttm_dumb_map_offset(file_priv, &qdev->ddev, qxl_map->handle,
  71                                           &qxl_map->offset);
  72}
  73
  74struct qxl_reloc_info {
  75        int type;
  76        struct qxl_bo *dst_bo;
  77        uint32_t dst_offset;
  78        struct qxl_bo *src_bo;
  79        int src_offset;
  80};
  81
  82/*
  83 * dst must be validated, i.e. whole bo on vram/surfacesram (right now all bo's
  84 * are on vram).
  85 * *(dst + dst_off) = qxl_bo_physical_address(src, src_off)
  86 */
  87static void
  88apply_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
  89{
  90        void *reloc_page;
  91
  92        reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
  93        *(uint64_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = qxl_bo_physical_address(qdev,
  94                                                                                              info->src_bo,
  95                                                                                              info->src_offset);
  96        qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
  97}
  98
  99static void
 100apply_surf_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
 101{
 102        uint32_t id = 0;
 103        void *reloc_page;
 104
 105        if (info->src_bo && !info->src_bo->is_primary)
 106                id = info->src_bo->surface_id;
 107
 108        reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
 109        *(uint32_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = id;
 110        qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
 111}
 112
 113/* return holding the reference to this object */
 114static int qxlhw_handle_to_bo(struct drm_file *file_priv, uint64_t handle,
 115                              struct qxl_release *release, struct qxl_bo **qbo_p)
 116{
 117        struct drm_gem_object *gobj;
 118        struct qxl_bo *qobj;
 119        int ret;
 120
 121        gobj = drm_gem_object_lookup(file_priv, handle);
 122        if (!gobj)
 123                return -EINVAL;
 124
 125        qobj = gem_to_qxl_bo(gobj);
 126
 127        ret = qxl_release_list_add(release, qobj);
 128        drm_gem_object_put(gobj);
 129        if (ret)
 130                return ret;
 131
 132        *qbo_p = qobj;
 133        return 0;
 134}
 135
 136/*
 137 * Usage of execbuffer:
 138 * Relocations need to take into account the full QXLDrawable size.
 139 * However, the command as passed from user space must *not* contain the initial
 140 * QXLReleaseInfo struct (first XXX bytes)
 141 */
 142static int qxl_process_single_command(struct qxl_device *qdev,
 143                                      struct drm_qxl_command *cmd,
 144                                      struct drm_file *file_priv)
 145{
 146        struct qxl_reloc_info *reloc_info;
 147        int release_type;
 148        struct qxl_release *release;
 149        struct qxl_bo *cmd_bo;
 150        void *fb_cmd;
 151        int i, ret, num_relocs;
 152        int unwritten;
 153
 154        switch (cmd->type) {
 155        case QXL_CMD_DRAW:
 156                release_type = QXL_RELEASE_DRAWABLE;
 157                break;
 158        case QXL_CMD_SURFACE:
 159        case QXL_CMD_CURSOR:
 160        default:
 161                DRM_DEBUG("Only draw commands in execbuffers\n");
 162                return -EINVAL;
 163        }
 164
 165        if (cmd->command_size > PAGE_SIZE - sizeof(union qxl_release_info))
 166                return -EINVAL;
 167
 168        if (!access_ok(u64_to_user_ptr(cmd->command),
 169                       cmd->command_size))
 170                return -EFAULT;
 171
 172        reloc_info = kmalloc_array(cmd->relocs_num,
 173                                   sizeof(struct qxl_reloc_info), GFP_KERNEL);
 174        if (!reloc_info)
 175                return -ENOMEM;
 176
 177        ret = qxl_alloc_release_reserved(qdev,
 178                                         sizeof(union qxl_release_info) +
 179                                         cmd->command_size,
 180                                         release_type,
 181                                         &release,
 182                                         &cmd_bo);
 183        if (ret)
 184                goto out_free_reloc;
 185
 186        /* TODO copy slow path code from i915 */
 187        fb_cmd = qxl_bo_kmap_atomic_page(qdev, cmd_bo, (release->release_offset & PAGE_MASK));
 188        unwritten = __copy_from_user_inatomic_nocache
 189                (fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_MASK),
 190                 u64_to_user_ptr(cmd->command), cmd->command_size);
 191
 192        {
 193                struct qxl_drawable *draw = fb_cmd;
 194
 195                draw->mm_time = qdev->rom->mm_clock;
 196        }
 197
 198        qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd);
 199        if (unwritten) {
 200                DRM_ERROR("got unwritten %d\n", unwritten);
 201                ret = -EFAULT;
 202                goto out_free_release;
 203        }
 204
 205        /* fill out reloc info structs */
 206        num_relocs = 0;
 207        for (i = 0; i < cmd->relocs_num; ++i) {
 208                struct drm_qxl_reloc reloc;
 209                struct drm_qxl_reloc __user *u = u64_to_user_ptr(cmd->relocs);
 210
 211                if (copy_from_user(&reloc, u + i, sizeof(reloc))) {
 212                        ret = -EFAULT;
 213                        goto out_free_bos;
 214                }
 215
 216                /* add the bos to the list of bos to validate -
 217                   need to validate first then process relocs? */
 218                if (reloc.reloc_type != QXL_RELOC_TYPE_BO && reloc.reloc_type != QXL_RELOC_TYPE_SURF) {
 219                        DRM_DEBUG("unknown reloc type %d\n", reloc.reloc_type);
 220
 221                        ret = -EINVAL;
 222                        goto out_free_bos;
 223                }
 224                reloc_info[i].type = reloc.reloc_type;
 225
 226                if (reloc.dst_handle) {
 227                        ret = qxlhw_handle_to_bo(file_priv, reloc.dst_handle, release,
 228                                                 &reloc_info[i].dst_bo);
 229                        if (ret)
 230                                goto out_free_bos;
 231                        reloc_info[i].dst_offset = reloc.dst_offset;
 232                } else {
 233                        reloc_info[i].dst_bo = cmd_bo;
 234                        reloc_info[i].dst_offset = reloc.dst_offset + release->release_offset;
 235                }
 236                num_relocs++;
 237
 238                /* reserve and validate the reloc dst bo */
 239                if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle) {
 240                        ret = qxlhw_handle_to_bo(file_priv, reloc.src_handle, release,
 241                                                 &reloc_info[i].src_bo);
 242                        if (ret)
 243                                goto out_free_bos;
 244                        reloc_info[i].src_offset = reloc.src_offset;
 245                } else {
 246                        reloc_info[i].src_bo = NULL;
 247                        reloc_info[i].src_offset = 0;
 248                }
 249        }
 250
 251        /* validate all buffers */
 252        ret = qxl_release_reserve_list(release, false);
 253        if (ret)
 254                goto out_free_bos;
 255
 256        for (i = 0; i < cmd->relocs_num; ++i) {
 257                if (reloc_info[i].type == QXL_RELOC_TYPE_BO)
 258                        apply_reloc(qdev, &reloc_info[i]);
 259                else if (reloc_info[i].type == QXL_RELOC_TYPE_SURF)
 260                        apply_surf_reloc(qdev, &reloc_info[i]);
 261        }
 262
 263        qxl_release_fence_buffer_objects(release);
 264        ret = qxl_push_command_ring_release(qdev, release, cmd->type, true);
 265
 266out_free_bos:
 267out_free_release:
 268        if (ret)
 269                qxl_release_free(qdev, release);
 270out_free_reloc:
 271        kfree(reloc_info);
 272        return ret;
 273}
 274
 275static int qxl_execbuffer_ioctl(struct drm_device *dev, void *data,
 276                                struct drm_file *file_priv)
 277{
 278        struct qxl_device *qdev = to_qxl(dev);
 279        struct drm_qxl_execbuffer *execbuffer = data;
 280        struct drm_qxl_command user_cmd;
 281        int cmd_num;
 282        int ret;
 283
 284        for (cmd_num = 0; cmd_num < execbuffer->commands_num; ++cmd_num) {
 285
 286                struct drm_qxl_command __user *commands =
 287                        u64_to_user_ptr(execbuffer->commands);
 288
 289                if (copy_from_user(&user_cmd, commands + cmd_num,
 290                                       sizeof(user_cmd)))
 291                        return -EFAULT;
 292
 293                ret = qxl_process_single_command(qdev, &user_cmd, file_priv);
 294                if (ret)
 295                        return ret;
 296        }
 297        return 0;
 298}
 299
 300static int qxl_update_area_ioctl(struct drm_device *dev, void *data,
 301                                 struct drm_file *file)
 302{
 303        struct qxl_device *qdev = to_qxl(dev);
 304        struct drm_qxl_update_area *update_area = data;
 305        struct qxl_rect area = {.left = update_area->left,
 306                                .top = update_area->top,
 307                                .right = update_area->right,
 308                                .bottom = update_area->bottom};
 309        int ret;
 310        struct drm_gem_object *gobj = NULL;
 311        struct qxl_bo *qobj = NULL;
 312        struct ttm_operation_ctx ctx = { true, false };
 313
 314        if (update_area->left >= update_area->right ||
 315            update_area->top >= update_area->bottom)
 316                return -EINVAL;
 317
 318        gobj = drm_gem_object_lookup(file, update_area->handle);
 319        if (gobj == NULL)
 320                return -ENOENT;
 321
 322        qobj = gem_to_qxl_bo(gobj);
 323
 324        ret = qxl_bo_reserve(qobj);
 325        if (ret)
 326                goto out;
 327
 328        if (!qobj->tbo.pin_count) {
 329                qxl_ttm_placement_from_domain(qobj, qobj->type);
 330                ret = ttm_bo_validate(&qobj->tbo, &qobj->placement, &ctx);
 331                if (unlikely(ret))
 332                        goto out;
 333        }
 334
 335        ret = qxl_bo_check_id(qdev, qobj);
 336        if (ret)
 337                goto out2;
 338        if (!qobj->surface_id)
 339                DRM_ERROR("got update area for surface with no id %d\n", update_area->handle);
 340        ret = qxl_io_update_area(qdev, qobj, &area);
 341
 342out2:
 343        qxl_bo_unreserve(qobj);
 344
 345out:
 346        drm_gem_object_put(gobj);
 347        return ret;
 348}
 349
 350static int qxl_getparam_ioctl(struct drm_device *dev, void *data,
 351                       struct drm_file *file_priv)
 352{
 353        struct qxl_device *qdev = to_qxl(dev);
 354        struct drm_qxl_getparam *param = data;
 355
 356        switch (param->param) {
 357        case QXL_PARAM_NUM_SURFACES:
 358                param->value = qdev->rom->n_surfaces;
 359                break;
 360        case QXL_PARAM_MAX_RELOCS:
 361                param->value = QXL_MAX_RES;
 362                break;
 363        default:
 364                return -EINVAL;
 365        }
 366        return 0;
 367}
 368
 369static int qxl_clientcap_ioctl(struct drm_device *dev, void *data,
 370                                  struct drm_file *file_priv)
 371{
 372        struct qxl_device *qdev = to_qxl(dev);
 373        struct pci_dev *pdev = to_pci_dev(dev->dev);
 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 (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 = to_qxl(dev);
 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