1 /* $NetBSD: drm_module.c,v 1.11 2015/04/13 22:24:34 pgoyette Exp $ */ 2 3 /*- 4 * Copyright (c) 2013 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: drm_module.c,v 1.11 2015/04/13 22:24:34 pgoyette Exp $"); 34 35 #include <sys/types.h> 36 #include <sys/conf.h> 37 #include <sys/device.h> 38 #include <sys/module.h> 39 #ifndef _MODULE 40 #include <sys/once.h> 41 #endif 42 #include <sys/reboot.h> 43 #include <sys/systm.h> 44 45 #include <linux/mutex.h> 46 47 #include <drm/drmP.h> 48 #include <drm/drm_encoder_slave.h> 49 #include <drm/drm_sysctl.h> 50 51 /* 52 * XXX I2C stuff should be moved to a separate drmkms_i2c module. 53 */ 54 MODULE(MODULE_CLASS_DRIVER, drmkms, "drmkms_linux"); 55 56 struct mutex drm_global_mutex; 57 58 struct drm_sysctl_def drm_def = DRM_SYSCTL_INIT(); 59 60 static int 61 drm_init(void) 62 { 63 extern int linux_guarantee_initialized(void); 64 int error; 65 66 error = linux_guarantee_initialized(); 67 if (error) 68 return error; 69 70 if (ISSET(boothowto, AB_DEBUG)) 71 drm_debug = ~(unsigned int)0; 72 73 spin_lock_init(&drm_minor_lock); 74 idr_init(&drm_minors_idr); 75 linux_mutex_init(&drm_global_mutex); 76 drm_connector_ida_init(); 77 drm_global_init(); 78 drm_sysctl_init(&drm_def); 79 drm_i2c_encoders_init(); 80 81 return 0; 82 } 83 84 int drm_guarantee_initialized(void); /* XXX */ 85 int 86 drm_guarantee_initialized(void) 87 { 88 #ifdef _MODULE 89 return 0; 90 #else 91 static ONCE_DECL(drm_init_once); 92 93 return RUN_ONCE(&drm_init_once, &drm_init); 94 #endif 95 } 96 97 static void 98 drm_fini(void) 99 { 100 101 drm_i2c_encoders_fini(); 102 drm_sysctl_fini(&drm_def); 103 drm_global_release(); 104 drm_connector_ida_destroy(); 105 linux_mutex_destroy(&drm_global_mutex); 106 idr_destroy(&drm_minors_idr); 107 spin_lock_destroy(&drm_minor_lock); 108 } 109 110 static int 111 drmkms_modcmd(modcmd_t cmd, void *arg __unused) 112 { 113 #ifdef _MODULE 114 devmajor_t bmajor = NODEVMAJOR, cmajor = NODEVMAJOR; 115 #endif 116 int error; 117 118 switch (cmd) { 119 case MODULE_CMD_INIT: 120 #ifdef _MODULE 121 error = drm_init(); 122 #else 123 error = drm_guarantee_initialized(); 124 #endif 125 if (error) 126 return error; 127 #ifdef _MODULE 128 error = devsw_attach("drm", NULL, &bmajor, 129 &drm_cdevsw, &cmajor); 130 if (error) { 131 aprint_error("drmkms: unable to attach devsw: %d\n", 132 error); 133 return error; 134 } 135 #endif 136 return 0; 137 138 case MODULE_CMD_FINI: 139 #ifdef _MODULE 140 error = devsw_detach(NULL, &drm_cdevsw); 141 if (error) 142 return error; 143 #endif 144 drm_fini(); 145 return 0; 146 147 default: 148 return ENOTTY; 149 } 150 } 151