linux_module.c revision 1.2.2.1
1 1.2.2.1 tls /* $NetBSD: linux_module.c,v 1.2.2.1 2014/08/10 06:55:40 tls Exp $ */ 2 1.2 riastrad 3 1.2 riastrad /*- 4 1.2 riastrad * Copyright (c) 2014 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 1.2.2.1 tls __KERNEL_RCSID(0, "$NetBSD: linux_module.c,v 1.2.2.1 2014/08/10 06:55:40 tls Exp $"); 34 1.2 riastrad 35 1.2 riastrad #include <sys/module.h> 36 1.2.2.1 tls #ifndef _MODULE 37 1.2.2.1 tls #include <sys/once.h> 38 1.2.2.1 tls #endif 39 1.2 riastrad 40 1.2 riastrad #include <linux/highmem.h> 41 1.2.2.1 tls #include <linux/idr.h> 42 1.2.2.1 tls #include <linux/io.h> 43 1.2 riastrad #include <linux/mutex.h> 44 1.2.2.1 tls #include <linux/reservation.h> 45 1.2 riastrad #include <linux/workqueue.h> 46 1.2 riastrad 47 1.2 riastrad MODULE(MODULE_CLASS_MISC, drmkms_linux, NULL); 48 1.2 riastrad 49 1.2.2.1 tls DEFINE_WW_CLASS(reservation_ww_class __cacheline_aligned); 50 1.2.2.1 tls 51 1.2.2.1 tls static int 52 1.2.2.1 tls linux_init(void) 53 1.2.2.1 tls { 54 1.2.2.1 tls int error; 55 1.2.2.1 tls 56 1.2.2.1 tls error = linux_idr_module_init(); 57 1.2.2.1 tls if (error) { 58 1.2.2.1 tls printf("linux: unable to initialize idr: %d\n", error); 59 1.2.2.1 tls goto fail0; 60 1.2.2.1 tls } 61 1.2.2.1 tls 62 1.2.2.1 tls error = linux_kmap_init(); 63 1.2.2.1 tls if (error) { 64 1.2.2.1 tls printf("linux: unable to initialize kmap: %d\n", error); 65 1.2.2.1 tls goto fail1; 66 1.2.2.1 tls } 67 1.2.2.1 tls 68 1.2.2.1 tls error = linux_workqueue_init(); 69 1.2.2.1 tls if (error) { 70 1.2.2.1 tls printf("linux: unable to initialize workqueues: %d\n", error); 71 1.2.2.1 tls goto fail2; 72 1.2.2.1 tls } 73 1.2.2.1 tls 74 1.2.2.1 tls error = linux_writecomb_init(); 75 1.2.2.1 tls if (error) { 76 1.2.2.1 tls printf("linux: unable to initialize write-combining: %d\n", 77 1.2.2.1 tls error); 78 1.2.2.1 tls goto fail3; 79 1.2.2.1 tls } 80 1.2.2.1 tls 81 1.2.2.1 tls return 0; 82 1.2.2.1 tls 83 1.2.2.1 tls fail4: __unused 84 1.2.2.1 tls linux_writecomb_fini(); 85 1.2.2.1 tls fail3: linux_workqueue_fini(); 86 1.2.2.1 tls fail2: linux_kmap_fini(); 87 1.2.2.1 tls fail1: linux_idr_module_fini(); 88 1.2.2.1 tls fail0: return error; 89 1.2.2.1 tls } 90 1.2.2.1 tls 91 1.2.2.1 tls int linux_guarantee_initialized(void); /* XXX */ 92 1.2.2.1 tls int 93 1.2.2.1 tls linux_guarantee_initialized(void) 94 1.2.2.1 tls { 95 1.2.2.1 tls #ifdef _MODULE 96 1.2.2.1 tls return 0; 97 1.2.2.1 tls #else 98 1.2.2.1 tls static ONCE_DECL(linux_init_once); 99 1.2.2.1 tls 100 1.2.2.1 tls return RUN_ONCE(&linux_init_once, &linux_init); 101 1.2 riastrad #endif 102 1.2.2.1 tls } 103 1.2.2.1 tls 104 1.2.2.1 tls static void 105 1.2.2.1 tls linux_fini(void) 106 1.2.2.1 tls { 107 1.2.2.1 tls 108 1.2.2.1 tls linux_writecomb_fini(); 109 1.2.2.1 tls linux_workqueue_fini(); 110 1.2.2.1 tls linux_kmap_fini(); 111 1.2.2.1 tls } 112 1.2 riastrad 113 1.2 riastrad static int 114 1.2 riastrad drmkms_linux_modcmd(modcmd_t cmd, void *arg __unused) 115 1.2 riastrad { 116 1.2 riastrad 117 1.2 riastrad switch (cmd) { 118 1.2 riastrad case MODULE_CMD_INIT: 119 1.2.2.1 tls #ifdef _MODULE 120 1.2.2.1 tls return linux_init(); 121 1.2.2.1 tls #else 122 1.2.2.1 tls return linux_guarantee_initialized(); 123 1.2 riastrad #endif 124 1.2 riastrad case MODULE_CMD_FINI: 125 1.2.2.1 tls linux_fini(); 126 1.2 riastrad return 0; 127 1.2 riastrad default: 128 1.2 riastrad return ENOTTY; 129 1.2 riastrad } 130 1.2 riastrad } 131
Indexes created Tue Sep 23 20:09:58 GMT 2025