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151 lines
3.7 KiB
C
151 lines
3.7 KiB
C
/* $NetBSD: drm_module.c,v 1.11 2015/04/13 22:24:34 pgoyette Exp $ */
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/*-
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* Copyright (c) 2013 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Taylor R. Campbell.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: drm_module.c,v 1.11 2015/04/13 22:24:34 pgoyette Exp $");
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#include <sys/types.h>
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#include <sys/conf.h>
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#include <sys/device.h>
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#include <sys/module.h>
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#ifndef _MODULE
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#include <sys/once.h>
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#endif
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#include <sys/reboot.h>
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#include <sys/systm.h>
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#include <linux/mutex.h>
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#include <drm/drmP.h>
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#include <drm/drm_encoder_slave.h>
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#include <drm/drm_sysctl.h>
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/*
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* XXX I2C stuff should be moved to a separate drmkms_i2c module.
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*/
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MODULE(MODULE_CLASS_DRIVER, drmkms, "drmkms_linux");
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struct mutex drm_global_mutex;
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struct drm_sysctl_def drm_def = DRM_SYSCTL_INIT();
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static int
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drm_init(void)
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{
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extern int linux_guarantee_initialized(void);
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int error;
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error = linux_guarantee_initialized();
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if (error)
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return error;
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if (ISSET(boothowto, AB_DEBUG))
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drm_debug = ~(unsigned int)0;
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spin_lock_init(&drm_minor_lock);
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idr_init(&drm_minors_idr);
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linux_mutex_init(&drm_global_mutex);
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drm_connector_ida_init();
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drm_global_init();
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drm_sysctl_init(&drm_def);
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drm_i2c_encoders_init();
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return 0;
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}
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int drm_guarantee_initialized(void); /* XXX */
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int
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drm_guarantee_initialized(void)
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{
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#ifdef _MODULE
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return 0;
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#else
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static ONCE_DECL(drm_init_once);
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return RUN_ONCE(&drm_init_once, &drm_init);
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#endif
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}
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static void
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drm_fini(void)
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{
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drm_i2c_encoders_fini();
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drm_sysctl_fini(&drm_def);
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drm_global_release();
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drm_connector_ida_destroy();
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linux_mutex_destroy(&drm_global_mutex);
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idr_destroy(&drm_minors_idr);
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spin_lock_destroy(&drm_minor_lock);
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}
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static int
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drmkms_modcmd(modcmd_t cmd, void *arg __unused)
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{
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#ifdef _MODULE
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devmajor_t bmajor = NODEVMAJOR, cmajor = NODEVMAJOR;
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#endif
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int error;
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switch (cmd) {
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case MODULE_CMD_INIT:
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#ifdef _MODULE
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error = drm_init();
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#else
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error = drm_guarantee_initialized();
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#endif
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if (error)
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return error;
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#ifdef _MODULE
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error = devsw_attach("drm", NULL, &bmajor,
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&drm_cdevsw, &cmajor);
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if (error) {
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aprint_error("drmkms: unable to attach devsw: %d\n",
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error);
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return error;
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}
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#endif
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return 0;
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case MODULE_CMD_FINI:
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#ifdef _MODULE
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error = devsw_detach(NULL, &drm_cdevsw);
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if (error)
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return error;
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#endif
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drm_fini();
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return 0;
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default:
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return ENOTTY;
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}
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}
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