1 /* $NetBSD: via_module.c,v 1.2 2015/09/05 23:04:01 dholland Exp $ */ 2 3 /*- 4 * Copyright (c) 2015 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: via_module.c,v 1.2 2015/09/05 23:04:01 dholland Exp $"); 34 35 #include <sys/types.h> 36 #include <sys/module.h> 37 #include <sys/once.h> 38 39 #include <drm/drmP.h> 40 #include <drm/via_drm.h> 41 42 #include "via_drv.h" 43 44 MODULE(MODULE_CLASS_DRIVER, viadrmums, "drmkms,drmkms_pci"); 45 46 #ifdef _MODULE 47 #include "ioconf.c" 48 #endif 49 50 extern struct drm_driver *const via_drm_driver; /* XXX */ 51 52 static int 53 viadrm_init(void) 54 { 55 extern int drm_guarantee_initialized(void); 56 int error; 57 58 via_init_command_verifier(); /* idempotent, no unwind needed */ 59 60 error = drm_guarantee_initialized(); 61 if (error) 62 return error; 63 64 error = drm_pci_init(via_drm_driver, NULL); 65 if (error) { 66 aprint_error("viadrmkms: failed to init pci: %d\n", 67 error); 68 return error; 69 } 70 71 return 0; 72 } 73 74 int viadrm_guarantee_initialized(void); /* XXX */ 75 int 76 viadrm_guarantee_initialized(void) 77 { 78 #ifdef _MODULE 79 return 0; 80 #else 81 static ONCE_DECL(viadrm_init_once); 82 83 return RUN_ONCE(&viadrm_init_once, &viadrm_init); 84 #endif 85 } 86 87 static void 88 viadrm_fini(void) 89 { 90 91 drm_pci_exit(via_drm_driver, NULL); 92 } 93 94 static int 95 viadrmums_modcmd(modcmd_t cmd, void *arg __unused) 96 { 97 int error; 98 99 switch (cmd) { 100 case MODULE_CMD_INIT: 101 #ifdef _MODULE 102 error = viadrm_init(); 103 #else 104 error = viadrm_guarantee_initialized(); 105 #endif 106 if (error) { 107 aprint_error("viadrmums: failed to initialize: %d\n", 108 error); 109 return error; 110 } 111 #ifdef _MODULE 112 error = config_init_component(cfdriver_ioconf_viadrmums, 113 cfattach_ioconf_viadrmums, cfdata_ioconf_viadrmums); 114 if (error) { 115 aprint_error("viadrmums: failed to init component" 116 ": %d\n", error); 117 viadrm_fini(); 118 return error; 119 } 120 #endif 121 return 0; 122 123 case MODULE_CMD_FINI: 124 #ifdef _MODULE 125 error = config_fini_component(cfdriver_ioconf_viadrmums, 126 cfattach_ioconf_viadrmums, cfdata_ioconf_viadrmums); 127 if (error) { 128 aprint_error("viadrmums: failed to fini component" 129 ": %d\n", error); 130 return error; 131 } 132 #endif 133 viadrm_fini(); 134 return 0; 135 136 default: 137 return ENOTTY; 138 } 139 } 140