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      1 /*	$NetBSD: radeon_module.c,v 1.8 2022/07/17 15:36:59 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2014 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: radeon_module.c,v 1.8 2022/07/17 15:36:59 riastradh Exp $");
     34 
     35 #include <sys/types.h>
     36 #include <sys/module.h>
     37 #ifndef _MODULE
     38 #include <sys/once.h>
     39 #endif
     40 #include <sys/systm.h>
     41 
     42 #include <drm/drm_device.h>
     43 #include <drm/drm_drv.h>
     44 #include <drm/drm_sysctl.h>
     45 
     46 #include "radeon_drv.h"
     47 
     48 MODULE(MODULE_CLASS_DRIVER, radeon, "drmkms,drmkms_pci,drmkms_ttm"); /* XXX drmkms_i2c */
     49 
     50 #ifdef _MODULE
     51 #include "ioconf.c"
     52 #endif
     53 
     54 /* XXX Kludge to get these from radeon_drv.c.  */
     55 extern struct drm_driver *const radeon_drm_driver;
     56 extern int radeon_max_kms_ioctl;
     57 
     58 struct drm_sysctl_def radeon_def = DRM_SYSCTL_INIT();
     59 
     60 static int
     61 radeon_init(void)
     62 {
     63 	int error;
     64 
     65 	error = drm_guarantee_initialized();
     66 	if (error)
     67 		return error;
     68 
     69 	radeon_drm_driver->num_ioctls = radeon_max_kms_ioctl;
     70 	radeon_drm_driver->driver_features |= DRIVER_MODESET;
     71 
     72 	drm_sysctl_init(&radeon_def);
     73 
     74 	return 0;
     75 }
     76 
     77 int	radeon_guarantee_initialized(void); /* XXX */
     78 int
     79 radeon_guarantee_initialized(void)
     80 {
     81 #ifdef _MODULE
     82 	return 0;
     83 #else
     84 	static ONCE_DECL(radeon_init_once);
     85 
     86 	return RUN_ONCE(&radeon_init_once, &radeon_init);
     87 #endif
     88 }
     89 
     90 static void
     91 radeon_fini(void)
     92 {
     93 
     94 	drm_sysctl_fini(&radeon_def);
     95 }
     96 
     97 static int
     98 radeon_modcmd(modcmd_t cmd, void *arg __unused)
     99 {
    100 	int error;
    101 
    102 	switch (cmd) {
    103 	case MODULE_CMD_INIT:
    104 		/* XXX Kludge it up...  Must happen before attachment.  */
    105 #ifdef _MODULE
    106 		error = radeon_init();
    107 #else
    108 		error = radeon_guarantee_initialized();
    109 #endif
    110 		if (error) {
    111 			aprint_error("radeon: failed to initialize: %d\n",
    112 			    error);
    113 			return error;
    114 		}
    115 #ifdef _MODULE
    116 		error = config_init_component(cfdriver_ioconf_radeon,
    117 		    cfattach_ioconf_radeon, cfdata_ioconf_radeon);
    118 		if (error) {
    119 			aprint_error("radeon: failed to init component"
    120 			    ": %d\n", error);
    121 			radeon_fini();
    122 			return error;
    123 		}
    124 #endif
    125 		return 0;
    126 
    127 	case MODULE_CMD_FINI:
    128 #ifdef _MODULE
    129 		error = config_fini_component(cfdriver_ioconf_radeon,
    130 		    cfattach_ioconf_radeon, cfdata_ioconf_radeon);
    131 		if (error) {
    132 			aprint_error("radeon: failed to fini component"
    133 			    ": %d\n", error);
    134 			return error;
    135 		}
    136 #endif
    137 		radeon_fini();
    138 		return 0;
    139 
    140 	default:
    141 		return ENOTTY;
    142 	}
    143 }
    144