mirror of https://gitee.com/openkylin/linux.git
drm: merge drm_drv.c into drm_ioctl.c
All that is left in drm_drv.c is ioctl management. Merge it into drm_ioctl.c so we have all ioctl management in one file (and the name is much more fitting). Maybe we should now rename drm_stub.c to drm_drv.c again? Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
This commit is contained in:
David Herrmann
parent
1b7199fe98
commit
ec8f112db2
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@ -6,7 +6,7 @@ ccflags-y := -Iinclude/drm
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drm-y := drm_auth.o drm_buffer.o drm_bufs.o drm_cache.o \
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drm_context.o drm_dma.o \
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drm_drv.o drm_fops.o drm_gem.o drm_ioctl.o drm_irq.o \
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drm_fops.o drm_gem.o drm_ioctl.o drm_irq.o \
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drm_lock.o drm_memory.o drm_stub.o drm_vm.o \
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drm_agpsupport.o drm_scatter.o drm_pci.o \
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drm_platform.o drm_sysfs.o drm_hashtab.o drm_mm.o \
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@ -1,412 +0,0 @@
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/**
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* \file drm_drv.c
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* Generic driver template
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*
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* \author Rickard E. (Rik) Faith <faith@valinux.com>
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* \author Gareth Hughes <gareth@valinux.com>
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*
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* To use this template, you must at least define the following (samples
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* given for the MGA driver):
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*
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* \code
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* #define DRIVER_AUTHOR "VA Linux Systems, Inc."
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*
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* #define DRIVER_NAME "mga"
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* #define DRIVER_DESC "Matrox G200/G400"
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* #define DRIVER_DATE "20001127"
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*
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* #define drm_x mga_##x
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* \endcode
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*/
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/*
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* Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com
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*
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* Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <linux/debugfs.h>
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#include <linux/slab.h>
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#include <linux/export.h>
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#include <drm/drmP.h>
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#include <drm/drm_core.h>
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static int drm_version(struct drm_device *dev, void *data,
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struct drm_file *file_priv);
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#define DRM_IOCTL_DEF(ioctl, _func, _flags) \
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[DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl}
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/** Ioctl table */
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static const struct drm_ioctl_desc drm_ioctls[] = {
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DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED|DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
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DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
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DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0),
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DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
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DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER),
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DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
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DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
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DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
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DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
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DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
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DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
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DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
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DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
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DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
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DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
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DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma_ioctl, DRM_AUTH),
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DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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#if __OS_HAS_AGP
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DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
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DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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#endif
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DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
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DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
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};
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#define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
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/**
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* Copy and IOCTL return string to user space
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*/
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static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value)
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{
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int len;
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/* don't overflow userbuf */
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len = strlen(value);
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if (len > *buf_len)
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len = *buf_len;
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/* let userspace know exact length of driver value (which could be
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* larger than the userspace-supplied buffer) */
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*buf_len = strlen(value);
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/* finally, try filling in the userbuf */
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if (len && buf)
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if (copy_to_user(buf, value, len))
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return -EFAULT;
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return 0;
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}
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/**
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* Get version information
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*
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* \param inode device inode.
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* \param filp file pointer.
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* \param cmd command.
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* \param arg user argument, pointing to a drm_version structure.
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* \return zero on success or negative number on failure.
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*
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* Fills in the version information in \p arg.
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*/
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static int drm_version(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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struct drm_version *version = data;
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int err;
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version->version_major = dev->driver->major;
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version->version_minor = dev->driver->minor;
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version->version_patchlevel = dev->driver->patchlevel;
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err = drm_copy_field(version->name, &version->name_len,
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dev->driver->name);
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if (!err)
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err = drm_copy_field(version->date, &version->date_len,
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dev->driver->date);
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if (!err)
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err = drm_copy_field(version->desc, &version->desc_len,
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dev->driver->desc);
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return err;
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}
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/**
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* drm_ioctl_permit - Check ioctl permissions against caller
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*
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* @flags: ioctl permission flags.
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* @file_priv: Pointer to struct drm_file identifying the caller.
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*
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* Checks whether the caller is allowed to run an ioctl with the
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* indicated permissions. If so, returns zero. Otherwise returns an
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* error code suitable for ioctl return.
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*/
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static int drm_ioctl_permit(u32 flags, struct drm_file *file_priv)
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{
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/* ROOT_ONLY is only for CAP_SYS_ADMIN */
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if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)))
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return -EACCES;
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/* AUTH is only for authenticated or render client */
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if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) &&
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!file_priv->authenticated))
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return -EACCES;
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/* MASTER is only for master or control clients */
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if (unlikely((flags & DRM_MASTER) && !drm_is_master(file_priv) &&
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!drm_is_control_client(file_priv)))
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return -EACCES;
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/* Control clients must be explicitly allowed */
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if (unlikely(!(flags & DRM_CONTROL_ALLOW) &&
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drm_is_control_client(file_priv)))
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return -EACCES;
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/* Render clients must be explicitly allowed */
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if (unlikely(!(flags & DRM_RENDER_ALLOW) &&
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drm_is_render_client(file_priv)))
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return -EACCES;
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return 0;
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}
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/**
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* Called whenever a process performs an ioctl on /dev/drm.
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*
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* \param inode device inode.
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* \param file_priv DRM file private.
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* \param cmd command.
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* \param arg user argument.
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* \return zero on success or negative number on failure.
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*
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* Looks up the ioctl function in the ::ioctls table, checking for root
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* previleges if so required, and dispatches to the respective function.
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*/
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long drm_ioctl(struct file *filp,
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unsigned int cmd, unsigned long arg)
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{
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struct drm_file *file_priv = filp->private_data;
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struct drm_device *dev;
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const struct drm_ioctl_desc *ioctl = NULL;
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drm_ioctl_t *func;
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unsigned int nr = DRM_IOCTL_NR(cmd);
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int retcode = -EINVAL;
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char stack_kdata[128];
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char *kdata = NULL;
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unsigned int usize, asize;
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dev = file_priv->minor->dev;
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if (drm_device_is_unplugged(dev))
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return -ENODEV;
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if ((nr >= DRM_CORE_IOCTL_COUNT) &&
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((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END)))
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goto err_i1;
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if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) &&
|
||||
(nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) {
|
||||
u32 drv_size;
|
||||
ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
|
||||
drv_size = _IOC_SIZE(ioctl->cmd_drv);
|
||||
usize = asize = _IOC_SIZE(cmd);
|
||||
if (drv_size > asize)
|
||||
asize = drv_size;
|
||||
cmd = ioctl->cmd_drv;
|
||||
}
|
||||
else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) {
|
||||
u32 drv_size;
|
||||
|
||||
ioctl = &drm_ioctls[nr];
|
||||
|
||||
drv_size = _IOC_SIZE(ioctl->cmd);
|
||||
usize = asize = _IOC_SIZE(cmd);
|
||||
if (drv_size > asize)
|
||||
asize = drv_size;
|
||||
|
||||
cmd = ioctl->cmd;
|
||||
} else
|
||||
goto err_i1;
|
||||
|
||||
DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
|
||||
task_pid_nr(current),
|
||||
(long)old_encode_dev(file_priv->minor->kdev->devt),
|
||||
file_priv->authenticated, ioctl->name);
|
||||
|
||||
/* Do not trust userspace, use our own definition */
|
||||
func = ioctl->func;
|
||||
|
||||
if (unlikely(!func)) {
|
||||
DRM_DEBUG("no function\n");
|
||||
retcode = -EINVAL;
|
||||
goto err_i1;
|
||||
}
|
||||
|
||||
retcode = drm_ioctl_permit(ioctl->flags, file_priv);
|
||||
if (unlikely(retcode))
|
||||
goto err_i1;
|
||||
|
||||
if (cmd & (IOC_IN | IOC_OUT)) {
|
||||
if (asize <= sizeof(stack_kdata)) {
|
||||
kdata = stack_kdata;
|
||||
} else {
|
||||
kdata = kmalloc(asize, GFP_KERNEL);
|
||||
if (!kdata) {
|
||||
retcode = -ENOMEM;
|
||||
goto err_i1;
|
||||
}
|
||||
}
|
||||
if (asize > usize)
|
||||
memset(kdata + usize, 0, asize - usize);
|
||||
}
|
||||
|
||||
if (cmd & IOC_IN) {
|
||||
if (copy_from_user(kdata, (void __user *)arg,
|
||||
usize) != 0) {
|
||||
retcode = -EFAULT;
|
||||
goto err_i1;
|
||||
}
|
||||
} else if (cmd & IOC_OUT) {
|
||||
memset(kdata, 0, usize);
|
||||
}
|
||||
|
||||
if (ioctl->flags & DRM_UNLOCKED)
|
||||
retcode = func(dev, kdata, file_priv);
|
||||
else {
|
||||
mutex_lock(&drm_global_mutex);
|
||||
retcode = func(dev, kdata, file_priv);
|
||||
mutex_unlock(&drm_global_mutex);
|
||||
}
|
||||
|
||||
if (cmd & IOC_OUT) {
|
||||
if (copy_to_user((void __user *)arg, kdata,
|
||||
usize) != 0)
|
||||
retcode = -EFAULT;
|
||||
}
|
||||
|
||||
err_i1:
|
||||
if (!ioctl)
|
||||
DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n",
|
||||
task_pid_nr(current),
|
||||
(long)old_encode_dev(file_priv->minor->kdev->devt),
|
||||
file_priv->authenticated, cmd, nr);
|
||||
|
||||
if (kdata != stack_kdata)
|
||||
kfree(kdata);
|
||||
if (retcode)
|
||||
DRM_DEBUG("ret = %d\n", retcode);
|
||||
return retcode;
|
||||
}
|
||||
EXPORT_SYMBOL(drm_ioctl);
|
||||
|
||||
/**
|
||||
* drm_ioctl_flags - Check for core ioctl and return ioctl permission flags
|
||||
*
|
||||
* @nr: Ioctl number.
|
||||
* @flags: Where to return the ioctl permission flags
|
||||
*/
|
||||
bool drm_ioctl_flags(unsigned int nr, unsigned int *flags)
|
||||
{
|
||||
if ((nr >= DRM_COMMAND_END && nr < DRM_CORE_IOCTL_COUNT) ||
|
||||
(nr < DRM_COMMAND_BASE)) {
|
||||
*flags = drm_ioctls[nr].flags;
|
||||
return true;
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
EXPORT_SYMBOL(drm_ioctl_flags);
|
||||
|
|
@ -1,11 +1,3 @@
|
|||
/**
|
||||
* \file drm_ioctl.c
|
||||
* IOCTL processing for DRM
|
||||
*
|
||||
* \author Rickard E. (Rik) Faith <faith@valinux.com>
|
||||
* \author Gareth Hughes <gareth@valinux.com>
|
||||
*/
|
||||
|
||||
/*
|
||||
* Created: Fri Jan 8 09:01:26 1999 by faith@valinux.com
|
||||
*
|
||||
|
|
@ -13,6 +5,9 @@
|
|||
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
|
||||
* All Rights Reserved.
|
||||
*
|
||||
* Author Rickard E. (Rik) Faith <faith@valinux.com>
|
||||
* Author Gareth Hughes <gareth@valinux.com>
|
||||
*
|
||||
* 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
|
||||
|
|
@ -42,6 +37,124 @@
|
|||
#include <asm/mtrr.h>
|
||||
#endif
|
||||
|
||||
static int drm_version(struct drm_device *dev, void *data,
|
||||
struct drm_file *file_priv);
|
||||
|
||||
#define DRM_IOCTL_DEF(ioctl, _func, _flags) \
|
||||
[DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl}
|
||||
|
||||
/** 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, 0),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, DRM_UNLOCKED),
|
||||
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, 0),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
|
||||
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, 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_MASTER),
|
||||
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
|
||||
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
|
||||
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
|
||||
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
|
||||
|
||||
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),
|
||||
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
|
||||
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
|
||||
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma_ioctl, DRM_AUTH),
|
||||
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
||||
|
||||
#if __OS_HAS_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_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
||||
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED),
|
||||
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 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_CONTROL_ALLOW|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_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|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_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
||||
};
|
||||
|
||||
#define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
|
||||
|
||||
/**
|
||||
* Get the bus id.
|
||||
*
|
||||
|
|
@ -415,3 +528,243 @@ int drm_noop(struct drm_device *dev, void *data,
|
|||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(drm_noop);
|
||||
|
||||
/**
|
||||
* Copy and IOCTL return string to user space
|
||||
*/
|
||||
static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value)
|
||||
{
|
||||
int len;
|
||||
|
||||
/* don't overflow userbuf */
|
||||
len = strlen(value);
|
||||
if (len > *buf_len)
|
||||
len = *buf_len;
|
||||
|
||||
/* let userspace know exact length of driver value (which could be
|
||||
* larger than the userspace-supplied buffer) */
|
||||
*buf_len = strlen(value);
|
||||
|
||||
/* finally, try filling in the userbuf */
|
||||
if (len && buf)
|
||||
if (copy_to_user(buf, value, len))
|
||||
return -EFAULT;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* 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.
|
||||
*/
|
||||
static int drm_version(struct drm_device *dev, void *data,
|
||||
struct drm_file *file_priv)
|
||||
{
|
||||
struct drm_version *version = data;
|
||||
int err;
|
||||
|
||||
version->version_major = dev->driver->major;
|
||||
version->version_minor = dev->driver->minor;
|
||||
version->version_patchlevel = dev->driver->patchlevel;
|
||||
err = drm_copy_field(version->name, &version->name_len,
|
||||
dev->driver->name);
|
||||
if (!err)
|
||||
err = drm_copy_field(version->date, &version->date_len,
|
||||
dev->driver->date);
|
||||
if (!err)
|
||||
err = drm_copy_field(version->desc, &version->desc_len,
|
||||
dev->driver->desc);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
/**
|
||||
* drm_ioctl_permit - Check ioctl permissions against caller
|
||||
*
|
||||
* @flags: ioctl permission flags.
|
||||
* @file_priv: Pointer to struct drm_file identifying the caller.
|
||||
*
|
||||
* Checks whether the caller is allowed to run an ioctl with the
|
||||
* indicated permissions. If so, returns zero. Otherwise returns an
|
||||
* error code suitable for ioctl return.
|
||||
*/
|
||||
static int drm_ioctl_permit(u32 flags, struct drm_file *file_priv)
|
||||
{
|
||||
/* ROOT_ONLY is only for CAP_SYS_ADMIN */
|
||||
if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)))
|
||||
return -EACCES;
|
||||
|
||||
/* AUTH is only for authenticated or render client */
|
||||
if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) &&
|
||||
!file_priv->authenticated))
|
||||
return -EACCES;
|
||||
|
||||
/* MASTER is only for master or control clients */
|
||||
if (unlikely((flags & DRM_MASTER) && !drm_is_master(file_priv) &&
|
||||
!drm_is_control_client(file_priv)))
|
||||
return -EACCES;
|
||||
|
||||
/* Control clients must be explicitly allowed */
|
||||
if (unlikely(!(flags & DRM_CONTROL_ALLOW) &&
|
||||
drm_is_control_client(file_priv)))
|
||||
return -EACCES;
|
||||
|
||||
/* Render clients must be explicitly allowed */
|
||||
if (unlikely(!(flags & DRM_RENDER_ALLOW) &&
|
||||
drm_is_render_client(file_priv)))
|
||||
return -EACCES;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Called whenever a process performs an ioctl on /dev/drm.
|
||||
*
|
||||
* \param inode device inode.
|
||||
* \param file_priv DRM file private.
|
||||
* \param cmd command.
|
||||
* \param arg user argument.
|
||||
* \return zero on success or negative number on failure.
|
||||
*
|
||||
* Looks up the ioctl function in the ::ioctls table, checking for root
|
||||
* previleges if so required, and dispatches to the respective function.
|
||||
*/
|
||||
long drm_ioctl(struct file *filp,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
struct drm_file *file_priv = filp->private_data;
|
||||
struct drm_device *dev;
|
||||
const struct drm_ioctl_desc *ioctl = NULL;
|
||||
drm_ioctl_t *func;
|
||||
unsigned int nr = DRM_IOCTL_NR(cmd);
|
||||
int retcode = -EINVAL;
|
||||
char stack_kdata[128];
|
||||
char *kdata = NULL;
|
||||
unsigned int usize, asize;
|
||||
|
||||
dev = file_priv->minor->dev;
|
||||
|
||||
if (drm_device_is_unplugged(dev))
|
||||
return -ENODEV;
|
||||
|
||||
if ((nr >= DRM_CORE_IOCTL_COUNT) &&
|
||||
((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END)))
|
||||
goto err_i1;
|
||||
if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) &&
|
||||
(nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) {
|
||||
u32 drv_size;
|
||||
ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
|
||||
drv_size = _IOC_SIZE(ioctl->cmd_drv);
|
||||
usize = asize = _IOC_SIZE(cmd);
|
||||
if (drv_size > asize)
|
||||
asize = drv_size;
|
||||
cmd = ioctl->cmd_drv;
|
||||
}
|
||||
else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) {
|
||||
u32 drv_size;
|
||||
|
||||
ioctl = &drm_ioctls[nr];
|
||||
|
||||
drv_size = _IOC_SIZE(ioctl->cmd);
|
||||
usize = asize = _IOC_SIZE(cmd);
|
||||
if (drv_size > asize)
|
||||
asize = drv_size;
|
||||
|
||||
cmd = ioctl->cmd;
|
||||
} else
|
||||
goto err_i1;
|
||||
|
||||
DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
|
||||
task_pid_nr(current),
|
||||
(long)old_encode_dev(file_priv->minor->kdev->devt),
|
||||
file_priv->authenticated, ioctl->name);
|
||||
|
||||
/* Do not trust userspace, use our own definition */
|
||||
func = ioctl->func;
|
||||
|
||||
if (unlikely(!func)) {
|
||||
DRM_DEBUG("no function\n");
|
||||
retcode = -EINVAL;
|
||||
goto err_i1;
|
||||
}
|
||||
|
||||
retcode = drm_ioctl_permit(ioctl->flags, file_priv);
|
||||
if (unlikely(retcode))
|
||||
goto err_i1;
|
||||
|
||||
if (cmd & (IOC_IN | IOC_OUT)) {
|
||||
if (asize <= sizeof(stack_kdata)) {
|
||||
kdata = stack_kdata;
|
||||
} else {
|
||||
kdata = kmalloc(asize, GFP_KERNEL);
|
||||
if (!kdata) {
|
||||
retcode = -ENOMEM;
|
||||
goto err_i1;
|
||||
}
|
||||
}
|
||||
if (asize > usize)
|
||||
memset(kdata + usize, 0, asize - usize);
|
||||
}
|
||||
|
||||
if (cmd & IOC_IN) {
|
||||
if (copy_from_user(kdata, (void __user *)arg,
|
||||
usize) != 0) {
|
||||
retcode = -EFAULT;
|
||||
goto err_i1;
|
||||
}
|
||||
} else if (cmd & IOC_OUT) {
|
||||
memset(kdata, 0, usize);
|
||||
}
|
||||
|
||||
if (ioctl->flags & DRM_UNLOCKED)
|
||||
retcode = func(dev, kdata, file_priv);
|
||||
else {
|
||||
mutex_lock(&drm_global_mutex);
|
||||
retcode = func(dev, kdata, file_priv);
|
||||
mutex_unlock(&drm_global_mutex);
|
||||
}
|
||||
|
||||
if (cmd & IOC_OUT) {
|
||||
if (copy_to_user((void __user *)arg, kdata,
|
||||
usize) != 0)
|
||||
retcode = -EFAULT;
|
||||
}
|
||||
|
||||
err_i1:
|
||||
if (!ioctl)
|
||||
DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n",
|
||||
task_pid_nr(current),
|
||||
(long)old_encode_dev(file_priv->minor->kdev->devt),
|
||||
file_priv->authenticated, cmd, nr);
|
||||
|
||||
if (kdata != stack_kdata)
|
||||
kfree(kdata);
|
||||
if (retcode)
|
||||
DRM_DEBUG("ret = %d\n", retcode);
|
||||
return retcode;
|
||||
}
|
||||
EXPORT_SYMBOL(drm_ioctl);
|
||||
|
||||
/**
|
||||
* drm_ioctl_flags - Check for core ioctl and return ioctl permission flags
|
||||
*
|
||||
* @nr: Ioctl number.
|
||||
* @flags: Where to return the ioctl permission flags
|
||||
*/
|
||||
bool drm_ioctl_flags(unsigned int nr, unsigned int *flags)
|
||||
{
|
||||
if ((nr >= DRM_COMMAND_END && nr < DRM_CORE_IOCTL_COUNT) ||
|
||||
(nr < DRM_COMMAND_BASE)) {
|
||||
*flags = drm_ioctls[nr].flags;
|
||||
return true;
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
EXPORT_SYMBOL(drm_ioctl_flags);
|
||||
|
|
|
|||
Loading…
Reference in New Issue