drm_module.c revision 1.7.2.2
1 1.7.2.2 snj /* $NetBSD: drm_module.c,v 1.7.2.2 2015/01/11 05:59:17 snj 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 1.7.2.2 snj __KERNEL_RCSID(0, "$NetBSD: drm_module.c,v 1.7.2.2 2015/01/11 05:59:17 snj 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 1.7.2.2 snj #include <drm/drm_sysctl.h> 49 1.2 riastrad 50 1.2 riastrad /* 51 1.2 riastrad * XXX I2C stuff should be moved to a separate drmkms_i2c module. 52 1.2 riastrad */ 53 1.2 riastrad MODULE(MODULE_CLASS_DRIVER, drmkms, "iic,drmkms_linux"); 54 1.2 riastrad 55 1.6 riastrad struct mutex drm_global_mutex; 56 1.6 riastrad 57 1.7.2.2 snj struct drm_sysctl_def drm_def = DRM_SYSCTL_INIT(); 58 1.7.2.2 snj 59 1.6 riastrad static int 60 1.6 riastrad drm_init(void) 61 1.6 riastrad { 62 1.6 riastrad extern int linux_guarantee_initialized(void); 63 1.6 riastrad int error; 64 1.6 riastrad 65 1.6 riastrad error = linux_guarantee_initialized(); 66 1.6 riastrad if (error) 67 1.6 riastrad return error; 68 1.6 riastrad 69 1.6 riastrad if (ISSET(boothowto, AB_DEBUG)) 70 1.6 riastrad drm_debug = ~(unsigned int)0; 71 1.6 riastrad 72 1.6 riastrad spin_lock_init(&drm_minor_lock); 73 1.6 riastrad idr_init(&drm_minors_idr); 74 1.6 riastrad linux_mutex_init(&drm_global_mutex); 75 1.6 riastrad drm_connector_ida_init(); 76 1.7 riastrad drm_global_init(); 77 1.7.2.2 snj drm_sysctl_init(&drm_def); 78 1.6 riastrad 79 1.6 riastrad return 0; 80 1.6 riastrad } 81 1.6 riastrad 82 1.6 riastrad int drm_guarantee_initialized(void); /* XXX */ 83 1.6 riastrad int 84 1.6 riastrad drm_guarantee_initialized(void) 85 1.6 riastrad { 86 1.5 riastrad #ifdef _MODULE 87 1.6 riastrad return 0; 88 1.5 riastrad #else 89 1.6 riastrad static ONCE_DECL(drm_init_once); 90 1.6 riastrad 91 1.6 riastrad return RUN_ONCE(&drm_init_once, &drm_init); 92 1.2 riastrad #endif 93 1.6 riastrad } 94 1.6 riastrad 95 1.6 riastrad static void 96 1.6 riastrad drm_fini(void) 97 1.6 riastrad { 98 1.7.2.2 snj drm_sysctl_fini(&drm_def); 99 1.7 riastrad drm_global_release(); 100 1.6 riastrad drm_connector_ida_destroy(); 101 1.6 riastrad linux_mutex_destroy(&drm_global_mutex); 102 1.6 riastrad idr_destroy(&drm_minors_idr); 103 1.6 riastrad spin_lock_destroy(&drm_minor_lock); 104 1.6 riastrad } 105 1.2 riastrad 106 1.2 riastrad static int 107 1.2 riastrad drmkms_modcmd(modcmd_t cmd, void *arg __unused) 108 1.2 riastrad { 109 1.2 riastrad #ifdef _MODULE 110 1.2 riastrad devmajor_t bmajor = NODEVMAJOR, cmajor = NODEVMAJOR; 111 1.6 riastrad #endif 112 1.2 riastrad int error; 113 1.2 riastrad 114 1.2 riastrad switch (cmd) { 115 1.2 riastrad case MODULE_CMD_INIT: 116 1.2 riastrad #ifdef _MODULE 117 1.6 riastrad error = drm_init(); 118 1.6 riastrad #else 119 1.6 riastrad error = drm_guarantee_initialized(); 120 1.6 riastrad #endif 121 1.6 riastrad if (error) 122 1.6 riastrad return error; 123 1.6 riastrad #ifdef _MODULE 124 1.2 riastrad error = devsw_attach("drm", NULL, &bmajor, 125 1.2 riastrad &drm_cdevsw, &cmajor); 126 1.2 riastrad if (error) { 127 1.2 riastrad aprint_error("drmkms: unable to attach devsw: %d\n", 128 1.2 riastrad error); 129 1.6 riastrad return error; 130 1.2 riastrad } 131 1.2 riastrad #endif 132 1.2 riastrad return 0; 133 1.2 riastrad 134 1.2 riastrad case MODULE_CMD_FINI: 135 1.2 riastrad #ifdef _MODULE 136 1.2 riastrad error = devsw_detach(NULL, &drm_cdevsw); 137 1.2 riastrad if (error) 138 1.2 riastrad return error; 139 1.2 riastrad #endif 140 1.6 riastrad drm_fini(); 141 1.2 riastrad return 0; 142 1.2 riastrad 143 1.2 riastrad default: 144 1.2 riastrad return ENOTTY; 145 1.2 riastrad } 146 1.2 riastrad } 147
Indexes created Thu Oct 02 14:10:14 GMT 2025