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via_module.c revision 1.1 
      1 /*	$NetBSD: via_module.c,v 1.1 2015/04/29 11:25:36 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2015 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Taylor R. Campbell.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: via_module.c,v 1.1 2015/04/29 11:25:36 riastradh Exp $");
     34 
     35 #include <sys/types.h>
     36 #include <sys/module.h>
     37 #include <sys/once.h>
     38 
     39 #include <drm/drmP.h>
     40 #include <drm/via_drm.h>
     41 
     42 #include "via_drv.h"
     43 
     44 MODULE(MODULE_CLASS_DRIVER, viadrmums, "drmkms,drmkms_pci");
     45 
     46 #ifdef _MODULE
     47 #include "ioconf.c"
     48 #endif
     49 
     50 extern struct drm_driver *const via_drm_driver; /* XXX */
     51 
     52 static int
     53 viadrm_init(void)
     54 {
     55 	extern int drm_guarantee_initialized(void);
     56 	int error;
     57 
     58 	via_init_command_verifier(); /* idempotent, no unwind needed */
     59 
     60 	error = drm_guarantee_initialized();
     61 	if (error)
     62 		return error;
     63 
     64 	error = drm_pci_init(via_drm_driver, NULL);
     65 	if (error) {
     66 		aprint_error("i915drmkms: failed to init pci: %d\n",
     67 		    error);
     68 		return error;
     69 	}
     70 
     71 	return 0;
     72 }
     73 
     74 int	viadrm_guarantee_initialized(void); /* XXX */
     75 int
     76 viadrm_guarantee_initialized(void)
     77 {
     78 #ifdef _MODULE
     79 	return 0;
     80 #else
     81 	static ONCE_DECL(viadrm_init_once);
     82 
     83 	return RUN_ONCE(&viadrm_init_once, &viadrm_init);
     84 #endif
     85 }
     86 
     87 static void
     88 viadrm_fini(void)
     89 {
     90 
     91 	drm_pci_exit(via_drm_driver, NULL);
     92 }
     93 
     94 static int
     95 viadrmums_modcmd(modcmd_t cmd, void *arg __unused)
     96 {
     97 	int error;
     98 
     99 	switch (cmd) {
    100 	case MODULE_CMD_INIT:
    101 #ifdef _MODULE
    102 		error = viadrm_init();
    103 #else
    104 		error = viadrm_guarantee_initialized();
    105 #endif
    106 		if (error) {
    107 			aprint_error("viadrmums: failed to initialize: %d\n",
    108 			    error);
    109 			return error;
    110 		}
    111 #ifdef _MODULE
    112 		error = config_init_component(cfdriver_ioconf_viadrmums,
    113 		    cfattach_ioconf_viadrmums, cfdata_ioconf_viadrmums);
    114 		if (error) {
    115 			aprint_error("viadrmums: failed to init component"
    116 			    ": %d\n", error);
    117 			viadrm_fini();
    118 			return error;
    119 		}
    120 #endif
    121 		return 0;
    122 
    123 	case MODULE_CMD_FINI:
    124 #ifdef _MODULE
    125 		error = config_fini_component(cfdriver_ioconf_viadrmums,
    126 		    cfattach_ioconf_viadrmums, cfdata_ioconf_viadrmums);
    127 		if (error) {
    128 			aprint_error("viadrmums: failed to fini component"
    129 			    ": %d\n", error);
    130 			return error;
    131 		}
    132 #endif
    133 		viadrm_fini();
    134 		return 0;
    135 
    136 	default:
    137 		return ENOTTY;
    138 	}
    139 }
    140