drm_module.c revision 1.7.2.1
1 1.7.2.1 martin /* $NetBSD: drm_module.c,v 1.7.2.1 2014/11/10 19:45:54 martin Exp $ */ 2 1.2 riastrad 3 1.2 riastrad /*- 4 1.2 riastrad * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 1.2 riastrad * All rights reserved. 6 1.2 riastrad * 7 1.2 riastrad * This code is derived from software contributed to The NetBSD Foundation 8 1.2 riastrad * by Taylor R. Campbell. 9 1.2 riastrad * 10 1.2 riastrad * Redistribution and use in source and binary forms, with or without 11 1.2 riastrad * modification, are permitted provided that the following conditions 12 1.2 riastrad * are met: 13 1.2 riastrad * 1. Redistributions of source code must retain the above copyright 14 1.2 riastrad * notice, this list of conditions and the following disclaimer. 15 1.2 riastrad * 2. Redistributions in binary form must reproduce the above copyright 16 1.2 riastrad * notice, this list of conditions and the following disclaimer in the 17 1.2 riastrad * documentation and/or other materials provided with the distribution. 18 1.2 riastrad * 19 1.2 riastrad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2 riastrad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2 riastrad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2 riastrad * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2 riastrad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2 riastrad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2 riastrad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2 riastrad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2 riastrad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2 riastrad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2 riastrad * POSSIBILITY OF SUCH DAMAGE. 30 1.2 riastrad */ 31 1.2 riastrad 32 1.2 riastrad #include <sys/cdefs.h> 33 1.7.2.1 martin __KERNEL_RCSID(0, "$NetBSD: drm_module.c,v 1.7.2.1 2014/11/10 19:45:54 martin Exp $"); 34 1.2 riastrad 35 1.2 riastrad #include <sys/types.h> 36 1.7.2.1 martin #include <sys/conf.h> 37 1.2 riastrad #include <sys/device.h> 38 1.2 riastrad #include <sys/module.h> 39 1.6 riastrad #ifndef _MODULE 40 1.6 riastrad #include <sys/once.h> 41 1.6 riastrad #endif 42 1.4 riastrad #include <sys/reboot.h> 43 1.2 riastrad #include <sys/systm.h> 44 1.2 riastrad 45 1.6 riastrad #include <linux/mutex.h> 46 1.6 riastrad 47 1.2 riastrad #include <drm/drmP.h> 48 1.2 riastrad 49 1.2 riastrad /* 50 1.2 riastrad * XXX I2C stuff should be moved to a separate drmkms_i2c module. 51 1.2 riastrad */ 52 1.2 riastrad MODULE(MODULE_CLASS_DRIVER, drmkms, "iic,drmkms_linux"); 53 1.2 riastrad 54 1.6 riastrad struct mutex drm_global_mutex; 55 1.6 riastrad 56 1.6 riastrad static int 57 1.6 riastrad drm_init(void) 58 1.6 riastrad { 59 1.6 riastrad extern int linux_guarantee_initialized(void); 60 1.6 riastrad int error; 61 1.6 riastrad 62 1.6 riastrad error = linux_guarantee_initialized(); 63 1.6 riastrad if (error) 64 1.6 riastrad return error; 65 1.6 riastrad 66 1.6 riastrad if (ISSET(boothowto, AB_DEBUG)) 67 1.6 riastrad drm_debug = ~(unsigned int)0; 68 1.6 riastrad 69 1.6 riastrad spin_lock_init(&drm_minor_lock); 70 1.6 riastrad idr_init(&drm_minors_idr); 71 1.6 riastrad linux_mutex_init(&drm_global_mutex); 72 1.6 riastrad drm_connector_ida_init(); 73 1.7 riastrad drm_global_init(); 74 1.6 riastrad 75 1.6 riastrad return 0; 76 1.6 riastrad } 77 1.6 riastrad 78 1.6 riastrad int drm_guarantee_initialized(void); /* XXX */ 79 1.6 riastrad int 80 1.6 riastrad drm_guarantee_initialized(void) 81 1.6 riastrad { 82 1.5 riastrad #ifdef _MODULE 83 1.6 riastrad return 0; 84 1.5 riastrad #else 85 1.6 riastrad static ONCE_DECL(drm_init_once); 86 1.6 riastrad 87 1.6 riastrad return RUN_ONCE(&drm_init_once, &drm_init); 88 1.2 riastrad #endif 89 1.6 riastrad } 90 1.6 riastrad 91 1.6 riastrad static void 92 1.6 riastrad drm_fini(void) 93 1.6 riastrad { 94 1.6 riastrad 95 1.7 riastrad drm_global_release(); 96 1.6 riastrad drm_connector_ida_destroy(); 97 1.6 riastrad linux_mutex_destroy(&drm_global_mutex); 98 1.6 riastrad idr_destroy(&drm_minors_idr); 99 1.6 riastrad spin_lock_destroy(&drm_minor_lock); 100 1.6 riastrad } 101 1.2 riastrad 102 1.2 riastrad static int 103 1.2 riastrad drmkms_modcmd(modcmd_t cmd, void *arg __unused) 104 1.2 riastrad { 105 1.2 riastrad #ifdef _MODULE 106 1.2 riastrad devmajor_t bmajor = NODEVMAJOR, cmajor = NODEVMAJOR; 107 1.6 riastrad #endif 108 1.2 riastrad int error; 109 1.2 riastrad 110 1.2 riastrad switch (cmd) { 111 1.2 riastrad case MODULE_CMD_INIT: 112 1.2 riastrad #ifdef _MODULE 113 1.6 riastrad error = drm_init(); 114 1.6 riastrad #else 115 1.6 riastrad error = drm_guarantee_initialized(); 116 1.6 riastrad #endif 117 1.6 riastrad if (error) 118 1.6 riastrad return error; 119 1.6 riastrad #ifdef _MODULE 120 1.2 riastrad error = devsw_attach("drm", NULL, &bmajor, 121 1.2 riastrad &drm_cdevsw, &cmajor); 122 1.2 riastrad if (error) { 123 1.2 riastrad aprint_error("drmkms: unable to attach devsw: %d\n", 124 1.2 riastrad error); 125 1.6 riastrad return error; 126 1.2 riastrad } 127 1.2 riastrad #endif 128 1.2 riastrad return 0; 129 1.2 riastrad 130 1.2 riastrad case MODULE_CMD_FINI: 131 1.2 riastrad #ifdef _MODULE 132 1.2 riastrad error = devsw_detach(NULL, &drm_cdevsw); 133 1.2 riastrad if (error) 134 1.2 riastrad return error; 135 1.2 riastrad #endif 136 1.6 riastrad drm_fini(); 137 1.2 riastrad return 0; 138 1.2 riastrad 139 1.2 riastrad default: 140 1.2 riastrad return ENOTTY; 141 1.2 riastrad } 142 1.2 riastrad } 143
Indexes created Thu Oct 02 14:10:14 GMT 2025