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 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 28 /* 29 * Xen network backend - ioemu version. 30 * 31 * HVM guest domains use an emulated network device (typically the 32 * rtl8139) to access the physical network via IO emulation running in 33 * a backend domain (generally domain 0). 34 * 35 * The IO emulation code sends and receives packets using DLPI, usually 36 * through a virtual NIC (vnic). 37 * 38 * The creation of the relevant vnic to correspond to the network interface 39 * in the guest domain requires the use of 'hotplug' scripts in the backend 40 * domain. This driver ensures that the hotplug scripts are run when 41 * such guest domains are created. 42 * 43 * It is used as a result of the 'compatible' property associated with 44 * IO emulated devices. See /etc/driver_aliases and common/xen/os/xvdi.c. 45 */ 46 47 #ifdef DEBUG 48 #define XNBE_DEBUG 1 49 #endif /* DEBUG */ 50 51 #include <sys/types.h> 52 #include <sys/conf.h> 53 #include <sys/sunddi.h> 54 #include <sys/modctl.h> 55 #include <xen/sys/xendev.h> 56 #ifdef XNBE_DEBUG 57 #include <sys/cmn_err.h> 58 #endif /* XNBE_DEBUG */ 59 60 #ifdef XNBE_DEBUG 61 int xnbe_debug = 0; 62 #endif /* XNBE_DEBUG */ 63 64 static int 65 xnbe_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 66 { 67 #ifdef XNBE_DEBUG 68 if (xnbe_debug > 0) 69 cmn_err(CE_NOTE, "xnbe_attach: dip 0x%p, cmd %d", 70 (void *)dip, cmd); 71 #endif /* XNBE_DEBUG */ 72 73 switch (cmd) { 74 case DDI_ATTACH: 75 break; 76 case DDI_RESUME: 77 return (DDI_SUCCESS); 78 default: 79 return (DDI_FAILURE); 80 } 81 82 (void) xvdi_post_event(dip, XEN_HP_ADD); 83 84 return (DDI_SUCCESS); 85 } 86 87 static int 88 xnbe_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 89 { 90 #ifdef XNBE_DEBUG 91 if (xnbe_debug > 0) 92 cmn_err(CE_NOTE, "detach: dip 0x%p, cmd %d", 93 (void *)dip, cmd); 94 #endif /* XNBE_DEBUG */ 95 96 switch (cmd) { 97 case DDI_DETACH: 98 return (DDI_SUCCESS); 99 case DDI_SUSPEND: 100 return (DDI_SUCCESS); 101 default: 102 return (DDI_FAILURE); 103 } 104 } 105 106 static struct cb_ops cb_ops = { 107 nulldev, /* open */ 108 nulldev, /* close */ 109 nodev, /* strategy */ 110 nodev, /* print */ 111 nodev, /* dump */ 112 nodev, /* read */ 113 nodev, /* write */ 114 nodev, /* ioctl */ 115 nodev, /* devmap */ 116 nodev, /* mmap */ 117 nodev, /* segmap */ 118 nochpoll, /* poll */ 119 ddi_prop_op, /* cb_prop_op */ 120 0, /* streamtab */ 121 D_NEW | D_MP | D_64BIT /* Driver compatibility flag */ 122 }; 123 124 static struct dev_ops ops = { 125 DEVO_REV, /* devo_rev */ 126 0, /* devo_refcnt */ 127 nulldev, /* devo_getinfo */ 128 nulldev, /* devo_identify */ 129 nulldev, /* devo_probe */ 130 xnbe_attach, /* devo_attach */ 131 xnbe_detach, /* devo_detach */ 132 nodev, /* devo_reset */ 133 &cb_ops, /* devo_cb_ops */ 134 (struct bus_ops *)0, /* devo_bus_ops */ 135 NULL, /* devo_power */ 136 ddi_quiesce_not_needed, /* devo_quiesce */ 137 }; 138 139 static struct modldrv modldrv = { 140 &mod_driverops, "xnbe driver", &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