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/** * \file drm_ioctl.c * IOCTL processing for DRM * * */ /* * * * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. */ #include "drmP.h" #include "drm_core.h" #include "linux/pci.h" /** * Get the bus id. * * \param inode device inode. * \param file_priv DRM file private. * \param cmd command. * \param arg user argument, pointing to a drm_unique structure. * \return zero on success or a negative number on failure. * * Copies the bus id from drm_device::unique into user space. */ int drm_getunique(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_unique *u = data; struct drm_master *master = file_priv->master; if (u->unique_len >= master->unique_len) { if (copy_to_user(u->unique, master->unique, master->unique_len)) return -EFAULT; } u->unique_len = master->unique_len; return 0; } static void drm_unset_busid(struct drm_device *dev, struct drm_master *master) { kfree(dev->devname); dev->devname = NULL; kfree(master->unique); master->unique = NULL; master->unique_len = 0; master->unique_size = 0; } /** * Set the bus id. * * \param inode device inode. * \param file_priv DRM file private. * \param cmd command. * \param arg user argument, pointing to a drm_unique structure. * \return zero on success or a negative number on failure. * * Copies the bus id from userspace into drm_device::unique, and verifies that * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated * in interface version 1.1 and will return EBUSY when setversion has requested * version 1.1 or greater. */ int drm_setunique(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_unique *u = data; struct drm_master *master = file_priv->master; int ret; if (master->unique_len || master->unique) return -EBUSY; if (!u->unique_len || u->unique_len > 1024) return -EINVAL; if (!dev->driver->bus->set_unique) return -EINVAL; ret = dev->driver->bus->set_unique(dev, master, u); if (ret) goto err; return 0; err: drm_unset_busid(dev, master); return ret; } static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv) { struct drm_master *master = file_priv->master; int ret; if (master->unique != NULL) drm_unset_busid(dev, master); ret = dev->driver->bus->set_busid(dev, master); if (ret) goto err; return 0; err: drm_unset_busid(dev, master); return ret; } /** * Get a mapping information. * * \param inode device inode. * \param file_priv DRM file private. * \param cmd command. * \param arg user argument, pointing to a drm_map structure. * * \return zero on success or a negative number on failure. * * Searches for the mapping with the specified offset and copies its information * into userspace */ int drm_getmap(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_map *map = data; struct drm_map_list *r_list = NULL; struct list_head *list; int idx; int i; idx = map->offset; mutex_lock(&dev->struct_mutex); if (idx < 0) { mutex_unlock(&dev->struct_mutex); return -EINVAL; } i = 0; list_for_each(list, &dev->maplist) { if (i == idx) { r_list = list_entry(list, struct drm_map_list, head); break; } i++; } if (!r_list || !r_list->map) { mutex_unlock(&dev->struct_mutex); return -EINVAL; } map->offset = r_list->map->offset; map->size = r_list->map->size; map->type = r_list->map->type; map->flags = r_list->map->flags; map->handle = (void *)(unsigned long) r_list->user_token; map->mtrr = r_list->map->mtrr; mutex_unlock(&dev->struct_mutex); return 0; } /** * Get client information. * * \param inode device inode. * \param file_priv DRM file private. * \param cmd command. * \param arg user argument, pointing to a drm_client structure. * * \return zero on success or a negative number on failure. * * Searches for the client with the specified index and copies its information * into userspace */ int drm_getclient(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_client *client = data; struct drm_file *pt; int idx; int i; idx = client->idx; mutex_lock(&dev->struct_mutex); i = 0; list_for_each_entry(pt, &dev->filelist, lhead) { if (i++ >= idx) { client->auth = pt->authenticated; client->pid = pt->pid; client->uid = pt->uid; client->magic = pt->magic; client->iocs = pt->ioctl_count; mutex_unlock(&dev->struct_mutex); return 0; } } mutex_unlock(&dev->struct_mutex); return -EINVAL; } /** * Get statistics information. * * \param inode device inode. * \param file_priv DRM file private. * \param cmd command. * \param arg user argument, pointing to a drm_stats structure. * * \return zero on success or a negative number on failure. */ int drm_getstats(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_stats *stats = data; int i; memset(stats, 0, sizeof(*stats)); mutex_lock(&dev->struct_mutex); for (i = 0; i < dev->counters; i++) { if (dev->types[i] == _DRM_STAT_LOCK) stats->data[i].value = (file_priv->master->lock.hw_lock ? file_priv->master->lock.hw_lock->lock : 0); else stats->data[i].value = atomic_read(&dev->counts[i]); stats->data[i].type = dev->types[i]; } stats->count = dev->counters; mutex_unlock(&dev->struct_mutex); return 0; } /** * Get device/driver capabilities */ int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_get_cap *req = data; req->value = 0; switch (req->capability) { case DRM_CAP_DUMB_BUFFER: if (dev->driver->dumb_create) req->value = 1; break; case DRM_CAP_VBLANK_HIGH_CRTC: req->value = 1; break; default: return -EINVAL; } return 0; } /** * Setversion ioctl. * * \param inode device inode. * \param file_priv DRM file private. * \param cmd command. * \param arg user argument, pointing to a drm_lock structure. * \return zero on success or negative number on failure. * * Sets the requested interface version */ int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_set_version *sv = data; int if_version, retcode = 0; if (sv->drm_di_major != -1) { if (sv->drm_di_major != DRM_IF_MAJOR || sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) { retcode = -EINVAL; goto done; } if_version = DRM_IF_VERSION(sv->drm_di_major, sv->drm_di_minor); dev->if_version = max(if_version, dev->if_version); if (sv->drm_di_minor >= 1) { /* * Version 1.1 includes tying of DRM to specific device * Version 1.4 has proper PCI domain support */ retcode = drm_set_busid(dev, file_priv); if (retcode) goto done; } } if (sv->drm_dd_major != -1) { if (sv->drm_dd_major != dev->driver->major || sv->drm_dd_minor < 0 || sv->drm_dd_minor > dev->driver->minor) { retcode = -EINVAL; goto done; } if (dev->driver->set_version) dev->driver->set_version(dev, sv); } done: sv->drm_di_major = DRM_IF_MAJOR; sv->drm_di_minor = DRM_IF_MINOR; sv->drm_dd_major = dev->driver->major; sv->drm_dd_minor = dev->driver->minor; return retcode; } /** No-op ioctl. */ int drm_noop(struct drm_device *dev, void *data, struct drm_file *file_priv) { DRM_DEBUG("\n"); return 0; }