/* * Usage of execbuffer: * Relocations need to take into account the full QXLDrawable size. * However, the command as passed from user space must *not* contain the initial * QXLReleaseInfo struct (first XXX bytes) */ static int qxl_process_single_command(struct qxl_device *qdev, struct drm_qxl_command *cmd, struct drm_file *file_priv) { struct qxl_reloc_info *reloc_info; int release_type; struct qxl_release *release; struct qxl_bo *cmd_bo; void *fb_cmd; int i, ret, num_relocs; int unwritten; switch (cmd->type) { case QXL_CMD_DRAW: release_type = QXL_RELEASE_DRAWABLE; break; case QXL_CMD_SURFACE: case QXL_CMD_CURSOR: default: DRM_DEBUG("Only draw commands in execbuffers\n"); return -EINVAL; break; } if (cmd->command_size > PAGE_SIZE - sizeof(union qxl_release_info)) return -EINVAL; if (!access_ok(VERIFY_READ, (void *)(unsigned long)cmd->command, cmd->command_size)) return -EFAULT; reloc_info = kmalloc_array(cmd->relocs_num, sizeof(struct qxl_reloc_info), GFP_KERNEL); if (!reloc_info) return -ENOMEM; ret = qxl_alloc_release_reserved(qdev, sizeof(union qxl_release_info) + cmd->command_size, release_type, &release, &cmd_bo); if (ret) goto out_free_reloc; /* TODO copy slow path code from i915 */ fb_cmd = qxl_bo_kmap_atomic_page(qdev, cmd_bo, (release->release_offset & PAGE_SIZE)); unwritten = __copy_from_user_inatomic_nocache(fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_SIZE), (void *)(unsigned long)cmd->command, cmd->command_size); { struct qxl_drawable *draw = fb_cmd; draw->mm_time = qdev->rom->mm_clock; } qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd); if (unwritten) { DRM_ERROR("got unwritten %d\n", unwritten); ret = -EFAULT; goto out_free_release; } /* fill out reloc info structs */ num_relocs = 0; for (i = 0; i < cmd->relocs_num; ++i) { struct drm_qxl_reloc reloc; if (copy_from_user(&reloc, &((struct drm_qxl_reloc *)(uintptr_t)cmd->relocs)[i], sizeof(reloc))) { ret = -EFAULT; goto out_free_bos; } /* add the bos to the list of bos to validate - need to validate first then process relocs? */ if (reloc.reloc_type != QXL_RELOC_TYPE_BO && reloc.reloc_type != QXL_RELOC_TYPE_SURF) { DRM_DEBUG("unknown reloc type %d\n", reloc.reloc_type); ret = -EINVAL; goto out_free_bos; } reloc_info[i].type = reloc.reloc_type; if (reloc.dst_handle) { ret = qxlhw_handle_to_bo(file_priv, reloc.dst_handle, release, &reloc_info[i].dst_bo); if (ret) goto out_free_bos; reloc_info[i].dst_offset = reloc.dst_offset; } else { reloc_info[i].dst_bo = cmd_bo; reloc_info[i].dst_offset = reloc.dst_offset + release->release_offset; } num_relocs++; /* reserve and validate the reloc dst bo */ if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle) { ret = qxlhw_handle_to_bo(file_priv, reloc.src_handle, release, &reloc_info[i].src_bo); if (ret) goto out_free_bos; reloc_info[i].src_offset = reloc.src_offset; } else { reloc_info[i].src_bo = NULL; reloc_info[i].src_offset = 0; } } /* validate all buffers */ ret = qxl_release_reserve_list(release, false); if (ret) goto out_free_bos; for (i = 0; i < cmd->relocs_num; ++i) { if (reloc_info[i].type == QXL_RELOC_TYPE_BO) apply_reloc(qdev, &reloc_info[i]); else if (reloc_info[i].type == QXL_RELOC_TYPE_SURF) apply_surf_reloc(qdev, &reloc_info[i]); } ret = qxl_push_command_ring_release(qdev, release, cmd->type, true); if (ret) qxl_release_backoff_reserve_list(release); else qxl_release_fence_buffer_objects(release); out_free_bos: out_free_release: if (ret) qxl_release_free(qdev, release); out_free_reloc: kfree(reloc_info); return ret; }
/* * Usage of execbuffer: * Relocations need to take into account the full QXLDrawable size. * However, the command as passed from user space must *not* contain the initial * QXLReleaseInfo struct (first XXX bytes) */ static int qxl_execbuffer_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct qxl_device *qdev = dev->dev_private; struct drm_qxl_execbuffer *execbuffer = data; struct drm_qxl_command user_cmd; int cmd_num; struct qxl_bo *reloc_src_bo; struct qxl_bo *reloc_dst_bo; struct drm_qxl_reloc reloc; void *fb_cmd; int i, ret; struct qxl_reloc_list reloc_list; int unwritten; uint32_t reloc_dst_offset; INIT_LIST_HEAD(&reloc_list.bos); for (cmd_num = 0; cmd_num < execbuffer->commands_num; ++cmd_num) { struct qxl_release *release; struct qxl_bo *cmd_bo; int release_type; struct drm_qxl_command *commands = (struct drm_qxl_command *)execbuffer->commands; if (DRM_COPY_FROM_USER(&user_cmd, &commands[cmd_num], sizeof(user_cmd))) return -EFAULT; switch (user_cmd.type) { case QXL_CMD_DRAW: release_type = QXL_RELEASE_DRAWABLE; break; case QXL_CMD_SURFACE: case QXL_CMD_CURSOR: default: DRM_DEBUG("Only draw commands in execbuffers\n"); return -EINVAL; break; } if (user_cmd.command_size > PAGE_SIZE - sizeof(union qxl_release_info)) return -EINVAL; ret = qxl_alloc_release_reserved(qdev, sizeof(union qxl_release_info) + user_cmd.command_size, release_type, &release, &cmd_bo); if (ret) return ret; /* TODO copy slow path code from i915 */ fb_cmd = qxl_bo_kmap_atomic_page(qdev, cmd_bo, (release->release_offset & PAGE_SIZE)); unwritten = __copy_from_user_inatomic_nocache(fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_SIZE), (void *)(unsigned long)user_cmd.command, user_cmd.command_size); qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd); if (unwritten) { DRM_ERROR("got unwritten %d\n", unwritten); qxl_release_unreserve(qdev, release); qxl_release_free(qdev, release); return -EFAULT; } for (i = 0 ; i < user_cmd.relocs_num; ++i) { if (DRM_COPY_FROM_USER(&reloc, &((struct drm_qxl_reloc *)user_cmd.relocs)[i], sizeof(reloc))) { qxl_bo_list_unreserve(&reloc_list, true); qxl_release_unreserve(qdev, release); qxl_release_free(qdev, release); return -EFAULT; } /* add the bos to the list of bos to validate - need to validate first then process relocs? */ if (reloc.dst_handle) { reloc_dst_bo = qxlhw_handle_to_bo(qdev, file_priv, reloc.dst_handle, &reloc_list); if (!reloc_dst_bo) { qxl_bo_list_unreserve(&reloc_list, true); qxl_release_unreserve(qdev, release); qxl_release_free(qdev, release); return -EINVAL; } reloc_dst_offset = 0; } else { reloc_dst_bo = cmd_bo; reloc_dst_offset = release->release_offset; } /* reserve and validate the reloc dst bo */ if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle > 0) { reloc_src_bo = qxlhw_handle_to_bo(qdev, file_priv, reloc.src_handle, &reloc_list); if (!reloc_src_bo) { if (reloc_dst_bo != cmd_bo) drm_gem_object_unreference_unlocked(&reloc_dst_bo->gem_base); qxl_bo_list_unreserve(&reloc_list, true); qxl_release_unreserve(qdev, release); qxl_release_free(qdev, release); return -EINVAL; } } else reloc_src_bo = NULL; if (reloc.reloc_type == QXL_RELOC_TYPE_BO) { apply_reloc(qdev, reloc_dst_bo, reloc_dst_offset + reloc.dst_offset, reloc_src_bo, reloc.src_offset); } else if (reloc.reloc_type == QXL_RELOC_TYPE_SURF) { apply_surf_reloc(qdev, reloc_dst_bo, reloc_dst_offset + reloc.dst_offset, reloc_src_bo); } else { DRM_ERROR("unknown reloc type %d\n", reloc.reloc_type); return -EINVAL; } if (reloc_src_bo && reloc_src_bo != cmd_bo) { qxl_release_add_res(qdev, release, reloc_src_bo); drm_gem_object_unreference_unlocked(&reloc_src_bo->gem_base); } if (reloc_dst_bo != cmd_bo) drm_gem_object_unreference_unlocked(&reloc_dst_bo->gem_base); } qxl_fence_releaseable(qdev, release); ret = qxl_push_command_ring_release(qdev, release, user_cmd.type, true); if (ret == -ERESTARTSYS) { qxl_release_unreserve(qdev, release); qxl_release_free(qdev, release); qxl_bo_list_unreserve(&reloc_list, true); return ret; } qxl_release_unreserve(qdev, release); } qxl_bo_list_unreserve(&reloc_list, 0); return 0; }