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110 lines
3.0 KiB
C
110 lines
3.0 KiB
C
/* $NetBSD: drm_pci_module.c,v 1.4 2015/03/06 01:24:24 riastradh 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_pci_module.c,v 1.4 2015/03/06 01:24:24 riastradh Exp $");
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#include <sys/module.h>
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#include <sys/once.h>
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#include <drm/drmP.h>
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MODULE(MODULE_CLASS_MISC, drmkms_pci, "drmkms,pci");
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const struct drm_agp_hooks drmkms_pci_agp_hooks = {
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.agph_acquire_ioctl = &drm_agp_acquire_ioctl,
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.agph_release_ioctl = &drm_agp_release_ioctl,
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.agph_enable_ioctl = &drm_agp_enable_ioctl,
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.agph_info_ioctl = &drm_agp_info_ioctl,
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.agph_alloc_ioctl = &drm_agp_alloc_ioctl,
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.agph_free_ioctl = &drm_agp_free_ioctl,
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.agph_bind_ioctl = &drm_agp_bind_ioctl,
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.agph_unbind_ioctl = &drm_agp_unbind_ioctl,
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.agph_release = &drm_agp_release,
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.agph_clear = &drm_agp_clear,
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};
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static int
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drmkms_pci_agp_init(void)
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{
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int error;
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error = drm_agp_register(&drmkms_pci_agp_hooks);
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if (error)
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return error;
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return 0;
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}
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int
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drmkms_pci_agp_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(drmkms_pci_agp_init_once);
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return RUN_ONCE(&drmkms_pci_agp_init_once, &drmkms_pci_agp_init);
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#endif
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}
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static void
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drmkms_pci_agp_fini(void)
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{
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drm_agp_deregister(&drmkms_pci_agp_hooks);
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}
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static int
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drmkms_pci_modcmd(modcmd_t cmd, void *arg __unused)
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{
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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 = drmkms_pci_agp_init();
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#else
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error = drmkms_pci_agp_guarantee_initialized();
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#endif
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if (error)
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return error;
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return 0;
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case MODULE_CMD_FINI:
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drmkms_pci_agp_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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