/** * \file drm_ioctl.c * IOCTL processing for DRM * * \author Rickard E. (Rik) Faith * \author Gareth Hughes */ /* * Created: Fri Jan 8 09:01:26 1999 by faith@valinux.com * * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * 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. * * $FreeBSD: src/sys/dev/drm2/drm_ioctl.c,v 1.1 2012/05/22 11:07:44 kib Exp $ */ #include #include #include /** * 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; if (u->unique_len >= dev->unique_len) { if (DRM_COPY_TO_USER(u->unique, dev->unique, dev->unique_len)) return EFAULT; } u->unique_len = dev->unique_len; return 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; int domain, bus, slot, func, ret; char *busid; /* Check and copy in the submitted Bus ID */ if (!u->unique_len || u->unique_len > 1024) return EINVAL; busid = kmalloc(u->unique_len + 1, M_DRM, M_WAITOK); if (busid == NULL) return ENOMEM; if (DRM_COPY_FROM_USER(busid, u->unique, u->unique_len)) { drm_free(busid, M_DRM); return EFAULT; } busid[u->unique_len] = '\0'; /* Return error if the busid submitted doesn't match the device's actual * busid. */ ret = ksscanf(busid, "PCI:%d:%d:%d", &bus, &slot, &func); if (ret != 3) { drm_free(busid, M_DRM); return EINVAL; } domain = bus >> 8; bus &= 0xff; if ((domain != dev->pci_domain) || (bus != dev->pci_bus) || (slot != dev->pci_slot) || (func != dev->pci_func)) { drm_free(busid, M_DRM); return EINVAL; } /* Actually set the device's busid now. */ DRM_LOCK(dev); if (dev->unique_len || dev->unique) { DRM_UNLOCK(dev); return EBUSY; } dev->unique_len = u->unique_len; dev->unique = busid; DRM_UNLOCK(dev); return 0; } static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv) { DRM_LOCK(dev); dev->unique_len = 20; dev->unique = kmalloc(dev->unique_len + 1, M_DRM, M_WAITOK | M_NULLOK); if (dev->unique == NULL) { DRM_UNLOCK(dev); return ENOMEM; } ksnprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%1x", dev->pci_domain, dev->pci_bus, dev->pci_slot, dev->pci_func); DRM_UNLOCK(dev); return 0; } /** * 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; if (idx < 0) { return EINVAL; } i = 0; DRM_LOCK(dev); 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) { DRM_UNLOCK(dev); 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 = r_list->map->handle; map->mtrr = r_list->map->mtrr; DRM_UNLOCK(dev); 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 = 0; idx = client->idx; DRM_LOCK(dev); 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; DRM_UNLOCK(dev); return 0; } } DRM_UNLOCK(dev); 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(struct drm_stats)); DRM_LOCK(dev); for (i = 0; i < dev->counters; i++) { if (dev->types[i] == _DRM_STAT_LOCK) stats->data[i].value = (dev->lock.hw_lock ? dev->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; DRM_UNLOCK(dev); 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; case DRM_CAP_DUMB_PREFERRED_DEPTH: req->value = dev->mode_config.preferred_depth; break; case DRM_CAP_DUMB_PREFER_SHADOW: req->value = dev->mode_config.prefer_shadow; break; case DRM_CAP_TIMESTAMP_MONOTONIC: req->value = drm_timestamp_monotonic; 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; struct drm_set_version ver; int if_version, retcode = 0; /* Save the incoming data, and set the response before continuing * any further. */ ver = *sv; 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; if (ver.drm_di_major != -1) { if (ver.drm_di_major != DRM_IF_MAJOR || ver.drm_di_minor < 0 || ver.drm_di_minor > DRM_IF_MINOR) { return EINVAL; } if_version = DRM_IF_VERSION(ver.drm_di_major, ver.drm_dd_minor); dev->if_version = DRM_MAX(if_version, dev->if_version); if (ver.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) return retcode; } } if (ver.drm_dd_major != -1) { if (ver.drm_dd_major != dev->driver->major || ver.drm_dd_minor < 0 || ver.drm_dd_minor > dev->driver->minor) { return EINVAL; } } return 0; } /** No-op ioctl. */ int drm_noop(struct drm_device *dev, void *data, struct drm_file *file_priv) { DRM_DEBUG("\n"); return 0; } EXPORT_SYMBOL(drm_noop);