1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* 30 * Xen network backend - ioemu version. 31 * 32 * HVM guest domains use an emulated network device (typically the 33 * rtl8139) to access the physical network via IO emulation running in 34 * a backend domain (generally domain 0). 35 * 36 * The IO emulation code sends and receives packets using DLPI, usually 37 * through a virtual NIC (vnic). 38 * 39 * The creation of the relevant vnic to correspond to the network interface 40 * in the guest domain requires the use of 'hotplug' scripts in the backend 41 * domain. This driver ensures that the hotplug scripts are run when 42 * such guest domains are created. 43 * 44 * It is used as a result of the 'compatible' property associated with 45 * IO emulated devices. See /etc/driver_aliases and common/xen/os/xvdi.c. 46 */ 47 48 #ifdef DEBUG 49 #define XNBE_DEBUG 1 50 #endif /* DEBUG */ 51 52 #include <sys/types.h> 53 #include <sys/conf.h> 54 #include <sys/sunddi.h> 55 #include <sys/modctl.h> 56 #include <xen/sys/xendev.h> 57 #ifdef XNBE_DEBUG 58 #include <sys/cmn_err.h> 59 #endif /* XNBE_DEBUG */ 60 61 #ifdef XNBE_DEBUG 62 int xnbe_debug = 0; 63 #endif /* XNBE_DEBUG */ 64 65 static int 66 xnbe_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 67 { 68 #ifdef XNBE_DEBUG 69 if (xnbe_debug > 0) 70 cmn_err(CE_NOTE, "xnbe_attach: dip 0x%p, cmd %d", 71 (void *)dip, cmd); 72 #endif /* XNBE_DEBUG */ 73 74 switch (cmd) { 75 case DDI_ATTACH: 76 break; 77 case DDI_RESUME: 78 return (DDI_SUCCESS); 79 default: 80 return (DDI_FAILURE); 81 } 82 83 (void) xvdi_post_event(dip, XEN_HP_ADD); 84 85 return (DDI_SUCCESS); 86 } 87 88 static int 89 xnbe_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 90 { 91 #ifdef XNBE_DEBUG 92 if (xnbe_debug > 0) 93 cmn_err(CE_NOTE, "detach: dip 0x%p, cmd %d", 94 (void *)dip, cmd); 95 #endif /* XNBE_DEBUG */ 96 97 switch (cmd) { 98 case DDI_DETACH: 99 return (DDI_SUCCESS); 100 case DDI_SUSPEND: 101 return (DDI_SUCCESS); 102 default: 103 return (DDI_FAILURE); 104 } 105 } 106 107 static struct cb_ops cb_ops = { 108 nulldev, /* open */ 109 nulldev, /* close */ 110 nodev, /* strategy */ 111 nodev, /* print */ 112 nodev, /* dump */ 113 nodev, /* read */ 114 nodev, /* write */ 115 nodev, /* ioctl */ 116 nodev, /* devmap */ 117 nodev, /* mmap */ 118 nodev, /* segmap */ 119 nochpoll, /* poll */ 120 ddi_prop_op, /* cb_prop_op */ 121 0, /* streamtab */ 122 D_NEW | D_MP | D_64BIT /* Driver compatibility flag */ 123 }; 124 125 static struct dev_ops ops = { 126 DEVO_REV, /* devo_rev */ 127 0, /* devo_refcnt */ 128 nulldev, /* devo_getinfo */ 129 nulldev, /* devo_identify */ 130 nulldev, /* devo_probe */ 131 xnbe_attach, /* devo_attach */ 132 xnbe_detach, /* devo_detach */ 133 nodev, /* devo_reset */ 134 &cb_ops, /* devo_cb_ops */ 135 (struct bus_ops *)0, /* devo_bus_ops */ 136 NULL /* devo_power */ 137 }; 138 139 static struct modldrv modldrv = { 140 &mod_driverops, "xnbe driver %I%", &ops, 141 }; 142 143 static struct modlinkage modlinkage = { 144 MODREV_1, &modldrv, NULL 145 }; 146 147 int 148 _init(void) 149 { 150 return (mod_install(&modlinkage)); 151 } 152 153 int 154 _info(struct modinfo *modinfop) 155 { 156 return (mod_info(&modlinkage, modinfop)); 157 } 158 159 int 160 _fini(void) 161 { 162 return (mod_remove(&modlinkage)); 163 } 164