507 строки
16 KiB
C
507 строки
16 KiB
C
/**
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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 "drmP.h"
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#include "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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/** Ioctl table */
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static struct drm_ioctl_desc drm_ioctls[] = {
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DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, 0),
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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, 0),
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DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, 0),
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DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, 0),
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DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER|DRM_ROOT_ONLY),
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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|DRM_ROOT_ONLY),
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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_modctx, 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_adddraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_rmdraw, 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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/* The DRM_IOCTL_DMA ioctl should be defined by the driver. */
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DRM_IOCTL_DEF(DRM_IOCTL_DMA, NULL, 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_ioctl, 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, 0),
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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_update_drawable_info, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, 0),
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DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH),
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DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_MASTER|DRM_CONTROL_ALLOW),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_MASTER|DRM_CONTROL_ALLOW),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_MASTER),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_MASTER|DRM_CONTROL_ALLOW),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_MASTER|DRM_CONTROL_ALLOW),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_mode_attachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_mode_detachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_MASTER | DRM_CONTROL_ALLOW),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_MASTER|DRM_CONTROL_ALLOW),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_MASTER|DRM_CONTROL_ALLOW),
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DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_MASTER|DRM_CONTROL_ALLOW),
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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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* Take down the DRM device.
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*
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* \param dev DRM device structure.
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*
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* Frees every resource in \p dev.
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*
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* \sa drm_device
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*/
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int drm_lastclose(struct drm_device * dev)
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{
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struct drm_vma_entry *vma, *vma_temp;
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int i;
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DRM_DEBUG("\n");
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if (dev->driver->lastclose)
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dev->driver->lastclose(dev);
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DRM_DEBUG("driver lastclose completed\n");
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if (dev->irq_enabled && !drm_core_check_feature(dev, DRIVER_MODESET))
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drm_irq_uninstall(dev);
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mutex_lock(&dev->struct_mutex);
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/* Free drawable information memory */
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drm_drawable_free_all(dev);
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del_timer(&dev->timer);
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/* Clear AGP information */
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if (drm_core_has_AGP(dev) && dev->agp &&
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!drm_core_check_feature(dev, DRIVER_MODESET)) {
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struct drm_agp_mem *entry, *tempe;
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/* Remove AGP resources, but leave dev->agp
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intact until drv_cleanup is called. */
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list_for_each_entry_safe(entry, tempe, &dev->agp->memory, head) {
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if (entry->bound)
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drm_unbind_agp(entry->memory);
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drm_free_agp(entry->memory, entry->pages);
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kfree(entry);
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}
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INIT_LIST_HEAD(&dev->agp->memory);
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if (dev->agp->acquired)
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drm_agp_release(dev);
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dev->agp->acquired = 0;
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dev->agp->enabled = 0;
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}
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if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg &&
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!drm_core_check_feature(dev, DRIVER_MODESET)) {
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drm_sg_cleanup(dev->sg);
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dev->sg = NULL;
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}
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/* Clear vma list (only built for debugging) */
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list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) {
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list_del(&vma->head);
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kfree(vma);
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}
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if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) && dev->queuelist) {
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for (i = 0; i < dev->queue_count; i++) {
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kfree(dev->queuelist[i]);
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dev->queuelist[i] = NULL;
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}
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kfree(dev->queuelist);
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dev->queuelist = NULL;
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}
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dev->queue_count = 0;
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if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
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!drm_core_check_feature(dev, DRIVER_MODESET))
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drm_dma_takedown(dev);
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dev->dev_mapping = NULL;
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mutex_unlock(&dev->struct_mutex);
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DRM_DEBUG("lastclose completed\n");
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return 0;
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}
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/**
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* Module initialization. Called via init_module at module load time, or via
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* linux/init/main.c (this is not currently supported).
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*
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* \return zero on success or a negative number on failure.
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*
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* Initializes an array of drm_device structures, and attempts to
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* initialize all available devices, using consecutive minors, registering the
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* stubs and initializing the AGP device.
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*
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* Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
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* after the initialization for driver customization.
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*/
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int drm_init(struct drm_driver *driver)
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{
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struct pci_dev *pdev = NULL;
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const struct pci_device_id *pid;
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int i;
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DRM_DEBUG("\n");
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INIT_LIST_HEAD(&driver->device_list);
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if (driver->driver_features & DRIVER_MODESET)
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return pci_register_driver(&driver->pci_driver);
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/* If not using KMS, fall back to stealth mode manual scanning. */
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for (i = 0; driver->pci_driver.id_table[i].vendor != 0; i++) {
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pid = &driver->pci_driver.id_table[i];
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/* Loop around setting up a DRM device for each PCI device
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* matching our ID and device class. If we had the internal
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* function that pci_get_subsys and pci_get_class used, we'd
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* be able to just pass pid in instead of doing a two-stage
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* thing.
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*/
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pdev = NULL;
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while ((pdev =
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pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
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pid->subdevice, pdev)) != NULL) {
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if ((pdev->class & pid->class_mask) != pid->class)
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continue;
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/* stealth mode requires a manual probe */
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pci_dev_get(pdev);
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drm_get_dev(pdev, pid, driver);
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}
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}
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return 0;
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}
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EXPORT_SYMBOL(drm_init);
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void drm_exit(struct drm_driver *driver)
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{
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struct drm_device *dev, *tmp;
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DRM_DEBUG("\n");
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if (driver->driver_features & DRIVER_MODESET) {
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pci_unregister_driver(&driver->pci_driver);
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} else {
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list_for_each_entry_safe(dev, tmp, &driver->device_list, driver_item)
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drm_put_dev(dev);
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}
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DRM_INFO("Module unloaded\n");
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}
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EXPORT_SYMBOL(drm_exit);
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/** File operations structure */
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static const struct file_operations drm_stub_fops = {
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.owner = THIS_MODULE,
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.open = drm_stub_open
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};
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static int __init drm_core_init(void)
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{
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int ret = -ENOMEM;
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idr_init(&drm_minors_idr);
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if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops))
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goto err_p1;
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drm_class = drm_sysfs_create(THIS_MODULE, "drm");
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if (IS_ERR(drm_class)) {
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printk(KERN_ERR "DRM: Error creating drm class.\n");
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ret = PTR_ERR(drm_class);
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goto err_p2;
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}
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drm_proc_root = proc_mkdir("dri", NULL);
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if (!drm_proc_root) {
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DRM_ERROR("Cannot create /proc/dri\n");
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ret = -1;
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goto err_p3;
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}
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drm_debugfs_root = debugfs_create_dir("dri", NULL);
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if (!drm_debugfs_root) {
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DRM_ERROR("Cannot create /sys/kernel/debug/dri\n");
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ret = -1;
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goto err_p3;
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}
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DRM_INFO("Initialized %s %d.%d.%d %s\n",
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CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE);
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return 0;
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err_p3:
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drm_sysfs_destroy();
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err_p2:
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unregister_chrdev(DRM_MAJOR, "drm");
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idr_destroy(&drm_minors_idr);
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err_p1:
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return ret;
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}
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static void __exit drm_core_exit(void)
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{
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remove_proc_entry("dri", NULL);
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debugfs_remove(drm_debugfs_root);
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drm_sysfs_destroy();
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unregister_chrdev(DRM_MAJOR, "drm");
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idr_destroy(&drm_minors_idr);
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}
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module_init(drm_core_init);
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module_exit(drm_core_exit);
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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 len;
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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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DRM_COPY(version->name, dev->driver->name);
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DRM_COPY(version->date, dev->driver->date);
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DRM_COPY(version->desc, dev->driver->desc);
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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.
|
|
*/
|
|
int drm_ioctl(struct inode *inode, struct file *filp,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct drm_file *file_priv = filp->private_data;
|
|
struct drm_device *dev = file_priv->minor->dev;
|
|
struct drm_ioctl_desc *ioctl;
|
|
drm_ioctl_t *func;
|
|
unsigned int nr = DRM_IOCTL_NR(cmd);
|
|
int retcode = -EINVAL;
|
|
char stack_kdata[128];
|
|
char *kdata = NULL;
|
|
|
|
atomic_inc(&dev->ioctl_count);
|
|
atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
|
|
++file_priv->ioctl_count;
|
|
|
|
DRM_DEBUG("pid=%d, cmd=0x%02x, nr=0x%02x, dev 0x%lx, auth=%d\n",
|
|
task_pid_nr(current), cmd, nr,
|
|
(long)old_encode_dev(file_priv->minor->device),
|
|
file_priv->authenticated);
|
|
|
|
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))
|
|
ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
|
|
else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) {
|
|
ioctl = &drm_ioctls[nr];
|
|
cmd = ioctl->cmd;
|
|
} else
|
|
goto err_i1;
|
|
|
|
/* Do not trust userspace, use our own definition */
|
|
func = ioctl->func;
|
|
/* is there a local override? */
|
|
if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl)
|
|
func = dev->driver->dma_ioctl;
|
|
|
|
if (!func) {
|
|
DRM_DEBUG("no function\n");
|
|
retcode = -EINVAL;
|
|
} else if (((ioctl->flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)) ||
|
|
((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) ||
|
|
((ioctl->flags & DRM_MASTER) && !file_priv->is_master) ||
|
|
(!(ioctl->flags & DRM_CONTROL_ALLOW) && (file_priv->minor->type == DRM_MINOR_CONTROL))) {
|
|
retcode = -EACCES;
|
|
} else {
|
|
if (cmd & (IOC_IN | IOC_OUT)) {
|
|
if (_IOC_SIZE(cmd) <= sizeof(stack_kdata)) {
|
|
kdata = stack_kdata;
|
|
} else {
|
|
kdata = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
|
|
if (!kdata) {
|
|
retcode = -ENOMEM;
|
|
goto err_i1;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (cmd & IOC_IN) {
|
|
if (copy_from_user(kdata, (void __user *)arg,
|
|
_IOC_SIZE(cmd)) != 0) {
|
|
retcode = -EFAULT;
|
|
goto err_i1;
|
|
}
|
|
}
|
|
retcode = func(dev, kdata, file_priv);
|
|
|
|
if (cmd & IOC_OUT) {
|
|
if (copy_to_user((void __user *)arg, kdata,
|
|
_IOC_SIZE(cmd)) != 0)
|
|
retcode = -EFAULT;
|
|
}
|
|
}
|
|
|
|
err_i1:
|
|
if (kdata != stack_kdata)
|
|
kfree(kdata);
|
|
atomic_dec(&dev->ioctl_count);
|
|
if (retcode)
|
|
DRM_DEBUG("ret = %x\n", retcode);
|
|
return retcode;
|
|
}
|
|
|
|
EXPORT_SYMBOL(drm_ioctl);
|
|
|
|
struct drm_local_map *drm_getsarea(struct drm_device *dev)
|
|
{
|
|
struct drm_map_list *entry;
|
|
|
|
list_for_each_entry(entry, &dev->maplist, head) {
|
|
if (entry->map && entry->map->type == _DRM_SHM &&
|
|
(entry->map->flags & _DRM_CONTAINS_LOCK)) {
|
|
return entry->map;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(drm_getsarea);
|