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         uint32_t handle;
  42         u32 domain = QXL_GEM_DOMAIN_VRAM;
  43
  44         if (qxl_alloc->size == 0) {
  45                 DRM_ERROR("invalid size %d\n", qxl_alloc->size);
  46                 return -EINVAL;
  47         }
  48         ret = qxl_gem_object_create_with_handle(qdev, file_priv,
  49                                                 domain,
  50                                                 qxl_alloc->size,
  51                                                 NULL,
  52                                                 NULL, &handle);
  53         if (ret) {
  54                 DRM_ERROR("%s: failed to create gem ret=%d\n",
  55                           __func__, ret);
  56                 return -ENOMEM;
  57         }
  58         qxl_alloc->handle = handle;
  59         return 0;
  60 }
  61
  62 int qxl_map_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
  63 {
  64         struct qxl_device *qdev = to_qxl(dev);
  65         struct drm_qxl_map *qxl_map = data;
  66
  67         return drm_gem_ttm_dumb_map_offset(file_priv, &qdev->ddev, qxl_map->handle,
  68                                            &qxl_map->offset);
  69 }
  70
  71 struct 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  */
  84 static void
  85 apply_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
  96 static void
  97 apply_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 */
 111 static 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(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  */
 139 static 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;
 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         }
 161
 162         if (cmd->command_size > PAGE_SIZE - sizeof(union qxl_release_info))
 163                 return -EINVAL;
 164
 165         if (!access_ok(u64_to_user_ptr(cmd->command),
 166                        cmd->command_size))
 167                 return -EFAULT;
 168
 169         reloc_info = kmalloc_array(cmd->relocs_num,
 170                                    sizeof(struct qxl_reloc_info), GFP_KERNEL);
 171         if (!reloc_info)
 172                 return -ENOMEM;
 173
 174         ret = qxl_alloc_release_reserved(qdev,
 175                                          sizeof(union qxl_release_info) +
 176                                          cmd->command_size,
 177                                          release_type,
 178                                          &release,
 179                                          &cmd_bo);
 180         if (ret)
 181                 goto out_free_reloc;
 182
 183         /* TODO copy slow path code from i915 */
 184         fb_cmd = qxl_bo_kmap_atomic_page(qdev, cmd_bo, (release->release_offset & PAGE_MASK));
 185         unwritten = __copy_from_user_inatomic_nocache
 186                 (fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_MASK),
 187                  u64_to_user_ptr(cmd->command), cmd->command_size);
 188
 189         {
 190                 struct qxl_drawable *draw = fb_cmd;
 191
 192                 draw->mm_time = qdev->rom->mm_clock;
 193         }
 194
 195         qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd);
 196         if (unwritten) {
 197                 DRM_ERROR("got unwritten %d\n", unwritten);
 198                 ret = -EFAULT;
 199                 goto out_free_release;
 200         }
 201
 202         /* fill out reloc info structs */
 203         for (i = 0; i < cmd->relocs_num; ++i) {
 204                 struct drm_qxl_reloc reloc;
 205                 struct drm_qxl_reloc __user *u = u64_to_user_ptr(cmd->relocs);
 206
 207                 if (copy_from_user(&reloc, u + i, sizeof(reloc))) {
 208                         ret = -EFAULT;
 209                         goto out_free_bos;
 210                 }
 211
 212                 /* add the bos to the list of bos to validate -
 213                    need to validate first then process relocs? */
 214                 if (reloc.reloc_type != QXL_RELOC_TYPE_BO && reloc.reloc_type != QXL_RELOC_TYPE_SURF) {
 215                         DRM_DEBUG("unknown reloc type %d\n", reloc.reloc_type);
 216
 217                         ret = -EINVAL;
 218                         goto out_free_bos;
 219                 }
 220                 reloc_info[i].type = reloc.reloc_type;
 221
 222                 if (reloc.dst_handle) {
 223                         ret = qxlhw_handle_to_bo(file_priv, reloc.dst_handle, release,
 224                                                  &reloc_info[i].dst_bo);
 225                         if (ret)
 226                                 goto out_free_bos;
 227                         reloc_info[i].dst_offset = reloc.dst_offset;
 228                 } else {
 229                         reloc_info[i].dst_bo = cmd_bo;
 230                         reloc_info[i].dst_offset = reloc.dst_offset + release->release_offset;
 231                 }
 232
 233                 /* reserve and validate the reloc dst bo */
 234                 if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle) {
 235                         ret = qxlhw_handle_to_bo(file_priv, reloc.src_handle, release,
 236                                                  &reloc_info[i].src_bo);
 237                         if (ret)
 238                                 goto out_free_bos;
 239                         reloc_info[i].src_offset = reloc.src_offset;
 240                 } else {
 241                         reloc_info[i].src_bo = NULL;
 242                         reloc_info[i].src_offset = 0;
 243                 }
 244         }
 245
 246         /* validate all buffers */
 247         ret = qxl_release_reserve_list(release, false);
 248         if (ret)
 249                 goto out_free_bos;
 250
 251         for (i = 0; i < cmd->relocs_num; ++i) {
 252                 if (reloc_info[i].type == QXL_RELOC_TYPE_BO)
 253                         apply_reloc(qdev, &reloc_info[i]);
 254                 else if (reloc_info[i].type == QXL_RELOC_TYPE_SURF)
 255                         apply_surf_reloc(qdev, &reloc_info[i]);
 256         }
 257
 258         qxl_release_fence_buffer_objects(release);
 259         ret = qxl_push_command_ring_release(qdev, release, cmd->type, true);
 260
 261 out_free_bos:
 262 out_free_release:
 263         if (ret)
 264                 qxl_release_free(qdev, release);
 265 out_free_reloc:
 266         kfree(reloc_info);
 267         return ret;
 268 }
 269
 270 int qxl_execbuffer_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
 271 {
 272         struct qxl_device *qdev = to_qxl(dev);
 273         struct drm_qxl_execbuffer *execbuffer = data;
 274         struct drm_qxl_command user_cmd;
 275         int cmd_num;
 276         int ret;
 277
 278         for (cmd_num = 0; cmd_num < execbuffer->commands_num; ++cmd_num) {
 279
 280                 struct drm_qxl_command __user *commands =
 281                         u64_to_user_ptr(execbuffer->commands);
 282
 283                 if (copy_from_user(&user_cmd, commands + cmd_num,
 284                                        sizeof(user_cmd)))
 285                         return -EFAULT;
 286
 287                 ret = qxl_process_single_command(qdev, &user_cmd, file_priv);
 288                 if (ret)
 289                         return ret;
 290         }
 291         return 0;
 292 }
 293
 294 int qxl_update_area_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
 295 {
 296         struct qxl_device *qdev = to_qxl(dev);
 297         struct drm_qxl_update_area *update_area = data;
 298         struct qxl_rect area = {.left = update_area->left,
 299                                 .top = update_area->top,
 300                                 .right = update_area->right,
 301                                 .bottom = update_area->bottom};
 302         int ret;
 303         struct drm_gem_object *gobj = NULL;
 304         struct qxl_bo *qobj = NULL;
 305         struct ttm_operation_ctx ctx = { true, false };
 306
 307         if (update_area->left >= update_area->right ||
 308             update_area->top >= update_area->bottom)
 309                 return -EINVAL;
 310
 311         gobj = drm_gem_object_lookup(file, update_area->handle);
 312         if (gobj == NULL)
 313                 return -ENOENT;
 314
 315         qobj = gem_to_qxl_bo(gobj);
 316
 317         ret = qxl_bo_reserve(qobj);
 318         if (ret)
 319                 goto out;
 320
 321         if (!qobj->tbo.pin_count) {
 322                 qxl_ttm_placement_from_domain(qobj, qobj->type);
 323                 ret = ttm_bo_validate(&qobj->tbo, &qobj->placement, &ctx);
 324                 if (unlikely(ret))
 325                         goto out;
 326         }
 327
 328         ret = qxl_bo_check_id(qdev, qobj);
 329         if (ret)
 330                 goto out2;
 331         if (!qobj->surface_id)
 332                 DRM_ERROR("got update area for surface with no id %d\n", update_area->handle);
 333         ret = qxl_io_update_area(qdev, qobj, &area);
 334
 335 out2:
 336         qxl_bo_unreserve(qobj);
 337
 338 out:
 339         drm_gem_object_put(gobj);
 340         return ret;
 341 }
 342
 343 int qxl_getparam_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
 344 {
 345         struct qxl_device *qdev = to_qxl(dev);
 346         struct drm_qxl_getparam *param = data;
 347
 348         switch (param->param) {
 349         case QXL_PARAM_NUM_SURFACES:
 350                 param->value = qdev->rom->n_surfaces;
 351                 break;
 352         case QXL_PARAM_MAX_RELOCS:
 353                 param->value = QXL_MAX_RES;
 354                 break;
 355         default:
 356                 return -EINVAL;
 357         }
 358         return 0;
 359 }
 360
 361 int qxl_clientcap_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
 362 {
 363         struct qxl_device *qdev = to_qxl(dev);
 364         struct pci_dev *pdev = to_pci_dev(dev->dev);
 365         struct drm_qxl_clientcap *param = data;
 366         int byte, idx;
 367
 368         byte = param->index / 8;
 369         idx = param->index % 8;
 370
 371         if (pdev->revision < 4)
 372                 return -ENOSYS;
 373
 374         if (byte >= 58)
 375                 return -ENOSYS;
 376
 377         if (qdev->rom->client_capabilities[byte] & (1 << idx))
 378                 return 0;
 379         return -ENOSYS;
 380 }
 381
 382 int qxl_alloc_surf_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
 383 {
 384         struct qxl_device *qdev = to_qxl(dev);
 385         struct drm_qxl_alloc_surf *param = data;
 386         int handle;
 387         int ret;
 388         int size, actual_stride;
 389         struct qxl_surface surf;
 390
 391         /* work out size allocate bo with handle */
 392         actual_stride = param->stride < 0 ? -param->stride : param->stride;
 393         size = actual_stride * param->height + actual_stride;
 394
 395         surf.format = param->format;
 396         surf.width = param->width;
 397         surf.height = param->height;
 398         surf.stride = param->stride;
 399         surf.data = 0;
 400
 401         ret = qxl_gem_object_create_with_handle(qdev, file,
 402                                                 QXL_GEM_DOMAIN_SURFACE,
 403                                                 size,
 404                                                 &surf,
 405                                                 NULL, &handle);
 406         if (ret) {
 407                 DRM_ERROR("%s: failed to create gem ret=%d\n",
 408                           __func__, ret);
 409                 return -ENOMEM;
 410         } else
 411                 param->handle = handle;
 412         return ret;
 413 }