| 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 | |