/* * 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. * * Author Rickard E. (Rik) Faith * Author Gareth Hughes * * 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. */ #include #include /* for TIOCSGRP */ #include #include #ifdef __linux__ #include #include "drm_legacy.h" #endif #include "drm_internal.h" #include "drm_crtc_internal.h" #include #include #include int drm_setunique(struct drm_device *, void *, struct drm_file *); /** * DOC: getunique and setversion story * * BEWARE THE DRAGONS! MIND THE TRAPDOORS! * * In an attempt to warn anyone else who's trying to figure out what's going * on here, I'll try to summarize the story. First things first, let's clear up * the names, because the kernel internals, libdrm and the ioctls are all named * differently: * * - GET_UNIQUE ioctl, implemented by drm_getunique is wrapped up in libdrm * through the drmGetBusid function. * - The libdrm drmSetBusid function is backed by the SET_UNIQUE ioctl. All * that code is nerved in the kernel with drm_invalid_op(). * - The internal set_busid kernel functions and driver callbacks are * exclusively use by the SET_VERSION ioctl, because only drm 1.0 (which is * nerved) allowed userspace to set the busid through the above ioctl. * - Other ioctls and functions involved are named consistently. * * For anyone wondering what's the difference between drm 1.1 and 1.4: Correctly * handling pci domains in the busid on ppc. Doing this correctly was only * implemented in libdrm in 2010, hence can't be nerved yet. No one knows what's * special with drm 1.2 and 1.3. * * Now the actual horror story of how device lookup in drm works. At large, * there's 2 different ways, either by busid, or by device driver name. * * Opening by busid is fairly simple: * * 1. First call SET_VERSION to make sure pci domains are handled properly. As a * side-effect this fills out the unique name in the master structure. * 2. Call GET_UNIQUE to read out the unique name from the master structure, * which matches the busid thanks to step 1. If it doesn't, proceed to try * the next device node. * * Opening by name is slightly different: * * 1. Directly call VERSION to get the version and to match against the driver * name returned by that ioctl. Note that SET_VERSION is not called, which * means the the unique name for the master node just opening is _not_ filled * out. This despite that with current drm device nodes are always bound to * one device, and can't be runtime assigned like with drm 1.0. * 2. Match driver name. If it mismatches, proceed to the next device node. * 3. Call GET_UNIQUE, and check whether the unique name has length zero (by * checking that the first byte in the string is 0). If that's not the case * libdrm skips and proceeds to the next device node. Probably this is just * copypasta from drm 1.0 times where a set unique name meant that the driver * was in use already, but that's just conjecture. * * Long story short: To keep the open by name logic working, GET_UNIQUE must * _not_ return a unique string when SET_VERSION hasn't been called yet, * otherwise libdrm breaks. Even when that unique string can't ever change, and * is totally irrelevant for actually opening the device because runtime * assignable device instances were only support in drm 1.0, which is long dead. * But the libdrm code in drmOpenByName somehow survived, hence this can't be * broken. */ /* * 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; } /* * 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; /* * Hollowed-out getclient ioctl to keep some dead old drm tests/tools * not breaking completely. Userspace tools stop enumerating one they * get -EINVAL, hence this is the return value we need to hand back for * no clients tracked. * * Unfortunately some clients (*cough* libva *cough*) use this in a fun * attempt to figure out whether they're authenticated or not. Since * that's the only thing they care about, give it to the directly * instead of walking one giant list. */ if (client->idx == 0) { client->auth = file_priv->authenticated; #ifdef __linux__ client->pid = task_pid_vnr(current); client->uid = overflowuid; #else client->pid = curproc->p_p->ps_pid; client->uid = 0xfffe; #endif client->magic = 0; client->iocs = 0; return 0; } else { 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. */ static int drm_getstats(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_stats *stats = data; /* Clear stats to prevent userspace from eating its stack garbage. */ memset(stats, 0, sizeof(*stats)); return 0; } /* * Get device/driver capabilities */ static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_get_cap *req = data; struct drm_crtc *crtc; req->value = 0; /* Only some caps make sense with UMS/render-only drivers. */ switch (req->capability) { case DRM_CAP_TIMESTAMP_MONOTONIC: req->value = 1; return 0; case DRM_CAP_PRIME: req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0; req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0; return 0; case DRM_CAP_SYNCOBJ: req->value = drm_core_check_feature(dev, DRIVER_SYNCOBJ); return 0; } /* Other caps only work with KMS drivers */ if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -ENOTSUPP; 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_ASYNC_PAGE_FLIP: req->value = dev->mode_config.async_page_flip; break; case DRM_CAP_PAGE_FLIP_TARGET: req->value = 1; drm_for_each_crtc(crtc, dev) { if (!crtc->funcs->page_flip_target) req->value = 0; } break; case DRM_CAP_CURSOR_WIDTH: if (dev->mode_config.cursor_width) req->value = dev->mode_config.cursor_width; else req->value = 64; break; case DRM_CAP_CURSOR_HEIGHT: if (dev->mode_config.cursor_height) req->value = dev->mode_config.cursor_height; else req->value = 64; break; case DRM_CAP_ADDFB2_MODIFIERS: req->value = dev->mode_config.allow_fb_modifiers; break; case DRM_CAP_CRTC_IN_VBLANK_EVENT: req->value = 1; break; default: return -EINVAL; } return 0; } /* * Set device/driver capabilities */ static int drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_set_client_cap *req = data; switch (req->capability) { case DRM_CLIENT_CAP_STEREO_3D: if (req->value > 1) return -EINVAL; file_priv->stereo_allowed = req->value; break; case DRM_CLIENT_CAP_UNIVERSAL_PLANES: if (req->value > 1) return -EINVAL; file_priv->universal_planes = req->value; break; case DRM_CLIENT_CAP_ATOMIC: if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) return -EINVAL; if (req->value > 1) return -EINVAL; file_priv->atomic = req->value; file_priv->universal_planes = req->value; /* * No atomic user-space blows up on aspect ratio mode bits. */ file_priv->aspect_ratio_allowed = req->value; break; case DRM_CLIENT_CAP_ASPECT_RATIO: if (req->value > 1) return -EINVAL; file_priv->aspect_ratio_allowed = req->value; break; #ifdef notyet case DRM_CLIENT_CAP_WRITEBACK_CONNECTORS: if (!file_priv->atomic) return -EINVAL; if (req->value > 1) return -EINVAL; file_priv->writeback_connectors = req->value; break; #endif 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 */ static int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_set_version ver, *sv = data; int if_version; /* 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; /* * We no longer support interface versions less than 1.1, so error * out if the xserver is too old. 1.1 always ties the drm to a * certain busid, this was done on attach */ if (ver.drm_di_major != -1) { if (ver.drm_di_major != DRM_IF_MAJOR || ver.drm_di_minor < 1 || 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 = imax(if_version, dev->if_version); } 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; } /** * drm_noop - DRM no-op ioctl implemntation * @dev: DRM device for the ioctl * @data: data pointer for the ioctl * @file_priv: DRM file for the ioctl call * * This no-op implementation for drm ioctls is useful for deprecated * functionality where we can't return a failure code because existing userspace * checks the result of the ioctl, but doesn't care about the action. * * Always returns successfully with 0. */ int drm_noop(struct drm_device *dev, void *data, struct drm_file *file_priv) { return 0; } EXPORT_SYMBOL(drm_noop); /** * drm_invalid_op - DRM invalid ioctl implemntation * @dev: DRM device for the ioctl * @data: data pointer for the ioctl * @file_priv: DRM file for the ioctl call * * This no-op implementation for drm ioctls is useful for deprecated * functionality where we really don't want to allow userspace to call the ioctl * any more. This is the case for old ums interfaces for drivers that * transitioned to kms gradually and so kept the old legacy tables around. This * only applies to radeon and i915 kms drivers, other drivers shouldn't need to * use this function. * * Always fails with a return value of -EINVAL. */ int drm_invalid_op(struct drm_device *dev, void *data, struct drm_file *file_priv) { return -EINVAL; } EXPORT_SYMBOL(drm_invalid_op); /* * Get version information * * \param inode device inode. * \param filp file pointer. * \param cmd command. * \param arg user argument, pointing to a drm_version structure. * \return zero on success or negative number on failure. * * Fills in the version information in \p arg. */ int drm_version(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_version *version = data; int len; #define DRM_COPY(name, value) \ len = strlen( value ); \ if ( len > name##_len ) len = name##_len; \ name##_len = strlen( value ); \ if ( len && name ) { \ if ( DRM_COPY_TO_USER( name, value, len ) ) \ return -EFAULT; \ } version->version_major = dev->driver->major; version->version_minor = dev->driver->minor; version->version_patchlevel = dev->driver->patchlevel; DRM_COPY(version->name, dev->driver->name); DRM_COPY(version->date, dev->driver->date); DRM_COPY(version->desc, dev->driver->desc); return 0; } #define DRM_IOCTL_DEF(ioctl, _func, _flags) \ [DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0} /* Ioctl table */ static const struct drm_ioctl_desc drm_ioctls[] = { DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, DRM_UNLOCKED), #ifdef __linux__ DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_legacy_getmap_ioctl, DRM_UNLOCKED), #endif DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_UNLOCKED | DRM_MASTER), DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_invalid_op, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_UNLOCKED|DRM_MASTER), #ifdef __linux__ DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_legacy_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_legacy_rmmap_ioctl, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_legacy_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_legacy_getsareactx, DRM_AUTH), #else DRM_IOCTL_DEF(DRM_IOCTL_GET_PCIINFO, drm_getpciinfo, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_noop, DRM_AUTH), #endif #ifdef __linux__ DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_UNLOCKED|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_UNLOCKED|DRM_ROOT_ONLY), #else /* On OpenBSD xorg privdrop has already occurred before this point */ DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_noop, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_noop, DRM_UNLOCKED|DRM_RENDER_ALLOW), #endif #ifdef __linux__ DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_legacy_addctx, DRM_AUTH|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_legacy_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), #endif DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), #ifdef __linux__ DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_legacy_getctx, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_legacy_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_legacy_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), #else DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), #endif #ifdef __linux__ DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_legacy_resctx, DRM_AUTH), #endif DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), #ifdef __linux__ DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_legacy_lock, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_legacy_unlock, DRM_AUTH), #endif DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH), #ifdef __linux__ DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_legacy_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_legacy_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_legacy_infobufs, DRM_AUTH), #else DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_noop, DRM_AUTH), #endif #ifdef __linux__ DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_legacy_mapbufs, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_legacy_freebufs, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_legacy_dma_ioctl, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_legacy_irq_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), #if IS_ENABLED(CONFIG_AGP) DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH), DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), #endif DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_legacy_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_legacy_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), #endif DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank_ioctl, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_legacy_modeset_ctl_ioctl, 0), DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_connector_property_set_ioctl, DRM_MASTER|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb_ioctl, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb_ioctl, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATOMIC, drm_mode_atomic_ioctl, DRM_MASTER|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATEPROPBLOB, drm_mode_createblob_ioctl, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROYPROPBLOB, drm_mode_destroyblob_ioctl, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_CREATE, drm_syncobj_create_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_DESTROY, drm_syncobj_destroy_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_HANDLE_TO_FD, drm_syncobj_handle_to_fd_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_FD_TO_HANDLE, drm_syncobj_fd_to_handle_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_WAIT, drm_syncobj_wait_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_RESET, drm_syncobj_reset_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_SIGNAL, drm_syncobj_signal_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF(DRM_IOCTL_CRTC_GET_SEQUENCE, drm_crtc_get_sequence_ioctl, DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_CRTC_QUEUE_SEQUENCE, drm_crtc_queue_sequence_ioctl, DRM_UNLOCKED), #ifdef __linux__ DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_LEASE, drm_mode_create_lease_ioctl, DRM_MASTER|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_LIST_LESSEES, drm_mode_list_lessees_ioctl, DRM_MASTER|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_GET_LEASE, drm_mode_get_lease_ioctl, DRM_MASTER|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_REVOKE_LEASE, drm_mode_revoke_lease_ioctl, DRM_MASTER|DRM_UNLOCKED), #endif }; #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls ) int pledge_ioctl_drm(struct proc *p, long com, dev_t device) { struct drm_device *dev = drm_get_device_from_kdev(device); unsigned int nr = DRM_IOCTL_NR(com); const struct drm_ioctl_desc *ioctl; if (dev == NULL) return EPERM; if (nr < DRM_CORE_IOCTL_COUNT && ((nr < DRM_COMMAND_BASE || nr >= DRM_COMMAND_END))) ioctl = &drm_ioctls[nr]; else if (nr >= DRM_COMMAND_BASE && nr < DRM_COMMAND_END && nr < DRM_COMMAND_BASE + dev->driver->num_ioctls) ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE]; else return EPERM; if (ioctl->flags & DRM_RENDER_ALLOW) return 0; /* * These are dangerous, but we have to allow them until we * have prime/dma-buf support. */ switch (com) { case DRM_IOCTL_GET_MAGIC: case DRM_IOCTL_GEM_OPEN: return 0; } return EPERM; } int drm_setunique(struct drm_device *dev, void *data, struct drm_file *file_priv) { /* * Deprecated in DRM version 1.1, and will return EBUSY * when setversion has * requested version 1.1 or greater. */ return (-EBUSY); } int drm_do_ioctl(struct drm_device *dev, int minor, u_long cmd, caddr_t data) { struct drm_file *file_priv; const struct drm_ioctl_desc *ioctl; drm_ioctl_t *func; unsigned int nr = DRM_IOCTL_NR(cmd); int retcode = -EINVAL; unsigned int usize, asize; mutex_lock(&dev->struct_mutex); file_priv = drm_find_file_by_minor(dev, minor); mutex_unlock(&dev->struct_mutex); if (file_priv == NULL) { DRM_ERROR("can't find authenticator\n"); return -EINVAL; } DRM_DEBUG("pid=%d, cmd=0x%02lx, nr=0x%02x, dev 0x%lx, auth=%d\n", DRM_CURRENTPID, cmd, (u_int)DRM_IOCTL_NR(cmd), (long)&dev->dev, file_priv->authenticated); switch (cmd) { case FIONBIO: case FIOASYNC: return 0; case TIOCSPGRP: dev->buf_pgid = *(int *)data; return 0; case TIOCGPGRP: *(int *)data = dev->buf_pgid; return 0; } if ((nr >= DRM_CORE_IOCTL_COUNT) && ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END))) return (-EINVAL); if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) && (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) { uint32_t drv_size; ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE]; drv_size = IOCPARM_LEN(ioctl->cmd_drv); usize = asize = IOCPARM_LEN(cmd); if (drv_size > asize) asize = drv_size; } else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) { uint32_t drv_size; ioctl = &drm_ioctls[nr]; drv_size = IOCPARM_LEN(ioctl->cmd_drv); usize = asize = IOCPARM_LEN(cmd); if (drv_size > asize) asize = drv_size; cmd = ioctl->cmd; } else return (-EINVAL); func = ioctl->func; if (!func) { DRM_DEBUG("no function\n"); return (-EINVAL); } /* ROOT_ONLY is only for CAP_SYS_ADMIN */ if ((ioctl->flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)) return -EACCES; /* AUTH is only for authenticated or render client */ if ((ioctl->flags & DRM_AUTH) && !drm_is_render_client(file_priv) && !file_priv->authenticated) return -EACCES; /* MASTER is only for master or control clients */ if ((ioctl->flags & DRM_MASTER) && !file_priv->is_master) return -EACCES; /* Render clients must be explicitly allowed */ if (!(ioctl->flags & DRM_RENDER_ALLOW) && drm_is_render_client(file_priv)) return -EACCES; if (ioctl->flags & DRM_UNLOCKED) retcode = func(dev, data, file_priv); else { /* XXX lock */ retcode = func(dev, data, file_priv); /* XXX unlock */ } return (retcode); } /* drmioctl is called whenever a process performs an ioctl on /dev/drm. */ int drmioctl(dev_t kdev, u_long cmd, caddr_t data, int flags, struct proc *p) { struct drm_device *dev = drm_get_device_from_kdev(kdev); int error; if (dev == NULL) return ENODEV; mtx_enter(&dev->quiesce_mtx); while (dev->quiesce) msleep(&dev->quiesce, &dev->quiesce_mtx, PZERO, "drmioc", 0); dev->quiesce_count++; mtx_leave(&dev->quiesce_mtx); error = -drm_do_ioctl(dev, minor(kdev), cmd, data); if (error < 0 && error != ERESTART && error != EJUSTRETURN) printf("%s: cmd 0x%lx errno %d\n", __func__, cmd, error); mtx_enter(&dev->quiesce_mtx); dev->quiesce_count--; if (dev->quiesce) wakeup(&dev->quiesce_count); mtx_leave(&dev->quiesce_mtx); return (error); }