drivers/gpu/drm/qxl/qxl_ioctl.c

   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  */
  36 int qxl_alloc_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
  37 {
  38         struct qxl_device *qdev = to_qxl(dev);
  39         struct drm_qxl_alloc *qxl_alloc = data;
  40         int ret;
  41         struct qxl_bo *qobj;
  42         uint32_t handle;
  43         u32 domain = QXL_GEM_DOMAIN_VRAM;
  44
  45         if (qxl_alloc->size == 0) {
  46                 DRM_ERROR("invalid size %d\n", qxl_alloc->size);
  47                 return -EINVAL;
  48         }
  49         ret = qxl_gem_object_create_with_handle(qdev, file_priv,
  50                                                 domain,
  51                                                 qxl_alloc->size,
  52                                                 NULL,
  53                                                 &qobj, &handle);
  54         if (ret) {
  55                 DRM_ERROR("%s: failed to create gem ret=%d\n",
  56                           __func__, ret);
  57                 return -ENOMEM;
  58         }
  59         qxl_alloc->handle = handle;
  60         return 0;
  61 }
  62
  63 int qxl_map_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
  64 {
  65         struct qxl_device *qdev = to_qxl(dev);
  66         struct drm_qxl_map *qxl_map = data;
  67
  68         return drm_gem_ttm_dumb_map_offset(file_priv, &qdev->ddev, qxl_map->handle,
  69                                            &qxl_map->offset);
  70 }
  71
  72 struct qxl_reloc_info {
  73         int type;
  74         struct qxl_bo *dst_bo;
  75         uint32_t dst_offset;
  76         struct qxl_bo *src_bo;
  77         int src_offset;
  78 };
  79
  80 /*
  81  * dst must be validated, i.e. whole bo on vram/surfacesram (right now all bo's
  82  * are on vram).
  83  * *(dst + dst_off) = qxl_bo_physical_address(src, src_off)
  84  */
  85 static void
  86 apply_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
  87 {
  88         void *reloc_page;
  89
  90         reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
  91         *(uint64_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = qxl_bo_physical_address(qdev,
  92                                                                                               info->src_bo,
  93                                                                                               info->src_offset);
  94         qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
  95 }
  96
  97 static void
  98 apply_surf_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
  99 {
 100         uint32_t id = 0;
 101         void *reloc_page;
 102
 103         if (info->src_bo && !info->src_bo->is_primary)
 104                 id = info->src_bo->surface_id;
 105
 106         reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
 107         *(uint32_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = id;
 108         qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
 109 }
 110
 111 /* return holding the reference to this object */
 112 static int qxlhw_handle_to_bo(struct drm_file *file_priv, uint64_t handle,
 113                               struct qxl_release *release, struct qxl_bo **qbo_p)
 114 {
 115         struct drm_gem_object *gobj;
 116         struct qxl_bo *qobj;
 117         int ret;
 118
 119         gobj = drm_gem_object_lookup(file_priv, handle);
 120         if (!gobj)
 121                 return -EINVAL;
 122
 123         qobj = gem_to_qxl_bo(gobj);
 124
 125         ret = qxl_release_list_add(release, qobj);
 126         drm_gem_object_put(gobj);
 127         if (ret)
 128                 return ret;
 129
 130         *qbo_p = qobj;
 131         return 0;
 132 }
 133
 134 /*
 135  * Usage of execbuffer:
 136  * Relocations need to take into account the full QXLDrawable size.
 137  * However, the command as passed from user space must *not* contain the initial
 138  * QXLReleaseInfo struct (first XXX bytes)
 139  */
 140 static int qxl_process_single_command(struct qxl_device *qdev,
 141                                       struct drm_qxl_command *cmd,
 142                                       struct drm_file *file_priv)
 143 {
 144         struct qxl_reloc_info *reloc_info;
 145         int release_type;
 146         struct qxl_release *release;
 147         struct qxl_bo *cmd_bo;
 148         void *fb_cmd;
 149         int i, ret, num_relocs;
 150         int unwritten;
 151
 152         switch (cmd->type) {
 153         case QXL_CMD_DRAW:
 154                 release_type = QXL_RELEASE_DRAWABLE;
 155                 break;
 156         case QXL_CMD_SURFACE:
 157         case QXL_CMD_CURSOR:
 158         default:
 159                 DRM_DEBUG("Only draw commands in execbuffers\n");
 160                 return -EINVAL;
 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         qxl_release_fence_buffer_objects(release);
 262         ret = qxl_push_command_ring_release(qdev, release, cmd->type, true);
 263
 264 out_free_bos:
 265 out_free_release:
 266         if (ret)
 267                 qxl_release_free(qdev, release);
 268 out_free_reloc:
 269         kfree(reloc_info);
 270         return ret;
 271 }
 272
 273 int qxl_execbuffer_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
 274 {
 275         struct qxl_device *qdev = to_qxl(dev);
 276         struct drm_qxl_execbuffer *execbuffer = data;
 277         struct drm_qxl_command user_cmd;
 278         int cmd_num;
 279         int ret;
 280
 281         for (cmd_num = 0; cmd_num < execbuffer->commands_num; ++cmd_num) {
 282
 283                 struct drm_qxl_command __user *commands =
 284                         u64_to_user_ptr(execbuffer->commands);
 285
 286                 if (copy_from_user(&user_cmd, commands + cmd_num,
 287                                        sizeof(user_cmd)))
 288                         return -EFAULT;
 289
 290                 ret = qxl_process_single_command(qdev, &user_cmd, file_priv);
 291                 if (ret)
 292                         return ret;
 293         }
 294         return 0;
 295 }
 296
 297 int qxl_update_area_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
 298 {
 299         struct qxl_device *qdev = to_qxl(dev);
 300         struct drm_qxl_update_area *update_area = data;
 301         struct qxl_rect area = {.left = update_area->left,
 302                                 .top = update_area->top,
 303                                 .right = update_area->right,
 304                                 .bottom = update_area->bottom};
 305         int ret;
 306         struct drm_gem_object *gobj = NULL;
 307         struct qxl_bo *qobj = NULL;
 308         struct ttm_operation_ctx ctx = { true, false };
 309
 310         if (update_area->left >= update_area->right ||
 311             update_area->top >= update_area->bottom)
 312                 return -EINVAL;
 313
 314         gobj = drm_gem_object_lookup(file, update_area->handle);
 315         if (gobj == NULL)
 316                 return -ENOENT;
 317
 318         qobj = gem_to_qxl_bo(gobj);
 319
 320         ret = qxl_bo_reserve(qobj);
 321         if (ret)
 322                 goto out;
 323
 324         if (!qobj->tbo.pin_count) {
 325                 qxl_ttm_placement_from_domain(qobj, qobj->type);
 326                 ret = ttm_bo_validate(&qobj->tbo, &qobj->placement, &ctx);
 327                 if (unlikely(ret))
 328                         goto out;
 329         }
 330
 331         ret = qxl_bo_check_id(qdev, qobj);
 332         if (ret)
 333                 goto out2;
 334         if (!qobj->surface_id)
 335                 DRM_ERROR("got update area for surface with no id %d\n", update_area->handle);
 336         ret = qxl_io_update_area(qdev, qobj, &area);
 337
 338 out2:
 339         qxl_bo_unreserve(qobj);
 340
 341 out:
 342         drm_gem_object_put(gobj);
 343         return ret;
 344 }
 345
 346 int qxl_getparam_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
 347 {
 348         struct qxl_device *qdev = to_qxl(dev);
 349         struct drm_qxl_getparam *param = data;
 350
 351         switch (param->param) {
 352         case QXL_PARAM_NUM_SURFACES:
 353                 param->value = qdev->rom->n_surfaces;
 354                 break;
 355         case QXL_PARAM_MAX_RELOCS:
 356                 param->value = QXL_MAX_RES;
 357                 break;
 358         default:
 359                 return -EINVAL;
 360         }
 361         return 0;
 362 }
 363
 364 int qxl_clientcap_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
 365 {
 366         struct qxl_device *qdev = to_qxl(dev);
 367         struct pci_dev *pdev = to_pci_dev(dev->dev);
 368         struct drm_qxl_clientcap *param = data;
 369         int byte, idx;
 370
 371         byte = param->index / 8;
 372         idx = param->index % 8;
 373
 374         if (pdev->revision < 4)
 375                 return -ENOSYS;
 376
 377         if (byte >= 58)
 378                 return -ENOSYS;
 379
 380         if (qdev->rom->client_capabilities[byte] & (1 << idx))
 381                 return 0;
 382         return -ENOSYS;
 383 }
 384
 385 int qxl_alloc_surf_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
 386 {
 387         struct qxl_device *qdev = to_qxl(dev);
 388         struct drm_qxl_alloc_surf *param = data;
 389         struct qxl_bo *qobj;
 390         int handle;
 391         int ret;
 392         int size, actual_stride;
 393         struct qxl_surface surf;
 394
 395         /* work out size allocate bo with handle */
 396         actual_stride = param->stride < 0 ? -param->stride : param->stride;
 397         size = actual_stride * param->height + actual_stride;
 398
 399         surf.format = param->format;
 400         surf.width = param->width;
 401         surf.height = param->height;
 402         surf.stride = param->stride;
 403         surf.data = 0;
 404
 405         ret = qxl_gem_object_create_with_handle(qdev, file,
 406                                                 QXL_GEM_DOMAIN_SURFACE,
 407                                                 size,
 408                                                 &surf,
 409                                                 &qobj, &handle);
 410         if (ret) {
 411                 DRM_ERROR("%s: failed to create gem ret=%d\n",
 412                           __func__, ret);
 413                 return -ENOMEM;
 414         } else
 415                 param->handle = handle;
 416         return ret;
 417 }