1 /* $NetBSD: linux_module.c,v 1.14 2022/09/01 01:54:38 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: linux_module.c,v 1.14 2022/09/01 01:54:38 riastradh Exp $"); 34 35 #include <sys/module.h> 36 #ifndef _MODULE 37 #include <sys/once.h> 38 #endif 39 40 #include <linux/atomic.h> 41 #include <linux/dma-fence.h> 42 #include <linux/highmem.h> 43 #include <linux/idr.h> 44 #include <linux/io.h> 45 #include <linux/irq_work.h> 46 #include <linux/kthread.h> 47 #include <linux/mutex.h> 48 #include <linux/rcupdate.h> 49 #include <linux/tasklet.h> 50 #include <linux/wait_bit.h> 51 #include <linux/workqueue.h> 52 53 MODULE(MODULE_CLASS_MISC, drmkms_linux, "i2cexec"); 54 55 static int 56 linux_init(void) 57 { 58 int error; 59 60 error = linux_idr_module_init(); 61 if (error) { 62 printf("linux: unable to initialize idr: %d\n", error); 63 goto fail0; 64 } 65 66 error = linux_kmap_init(); 67 if (error) { 68 printf("linux: unable to initialize kmap: %d\n", error); 69 goto fail1; 70 } 71 72 error = linux_rcu_gc_init(); 73 if (error) { 74 printf("linux: unable to initialize rcu gc: %d\n", error); 75 goto fail2; 76 } 77 78 error = linux_workqueue_init(); 79 if (error) { 80 printf("linux: unable to initialize workqueues: %d\n", error); 81 goto fail3; 82 } 83 84 error = linux_writecomb_init(); 85 if (error) { 86 printf("linux: unable to initialize write-combining: %d\n", 87 error); 88 goto fail4; 89 } 90 91 error = linux_atomic64_init(); 92 if (error) { 93 printf("linux: unable to initialize atomic64: %d\n", error); 94 goto fail5; 95 } 96 97 error = linux_tasklets_init(); 98 if (error) { 99 printf("linux: unable to initialize tasklets: %d\n", error); 100 goto fail6; 101 } 102 103 error = linux_wait_bit_init(); 104 if (error) { 105 printf("linux: unable to initialize wait_bit: %d\n", error); 106 goto fail7; 107 } 108 109 error = linux_kthread_init(); 110 if (error) { 111 printf("linux: unable to initialize kthread: %d\n", error); 112 goto fail8; 113 } 114 115 linux_irq_work_init(); 116 linux_dma_fences_init(); 117 118 return 0; 119 120 fail9: __unused 121 linux_kthread_fini(); 122 fail8: linux_wait_bit_fini(); 123 fail7: linux_tasklets_fini(); 124 fail6: linux_atomic64_fini(); 125 fail5: linux_writecomb_fini(); 126 fail4: linux_workqueue_fini(); 127 fail3: linux_rcu_gc_fini(); 128 fail2: linux_kmap_fini(); 129 fail1: linux_idr_module_fini(); 130 fail0: return error; 131 } 132 133 int linux_guarantee_initialized(void); /* XXX */ 134 int 135 linux_guarantee_initialized(void) 136 { 137 #ifdef _MODULE 138 return 0; 139 #else 140 static ONCE_DECL(linux_init_once); 141 142 return RUN_ONCE(&linux_init_once, &linux_init); 143 #endif 144 } 145 146 static void 147 linux_fini(void) 148 { 149 150 linux_dma_fences_fini(); 151 linux_irq_work_fini(); 152 linux_kthread_fini(); 153 linux_wait_bit_fini(); 154 linux_tasklets_fini(); 155 linux_atomic64_fini(); 156 linux_writecomb_fini(); 157 linux_workqueue_fini(); 158 linux_rcu_gc_fini(); 159 linux_kmap_fini(); 160 linux_idr_module_fini(); 161 } 162 163 static int 164 drmkms_linux_modcmd(modcmd_t cmd, void *arg __unused) 165 { 166 167 switch (cmd) { 168 case MODULE_CMD_INIT: 169 #ifdef _MODULE 170 return linux_init(); 171 #else 172 return linux_guarantee_initialized(); 173 #endif 174 case MODULE_CMD_FINI: 175 linux_fini(); 176 return 0; 177 default: 178 return ENOTTY; 179 } 180 } 181