usr/src/uts/common/xen/io/xpv_autoconfig.c

   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 #include <sys/types.h>
  28 #include <sys/hypervisor.h>
  29 #include <sys/sunndi.h>
  30 #include <sys/sunddi.h>
  31 #include <sys/ddi_subrdefs.h>
  32 #include <sys/bootconf.h>
  33 #include <sys/psw.h>
  34 #include <sys/modctl.h>
  35 #include <sys/errno.h>
  36 #include <sys/reboot.h>
  37 #include <sys/hypervisor.h>
  38 #include <xen/sys/xenbus_comms.h>
  39 #include <xen/sys/xenbus_impl.h>
  40 #include <xen/sys/xendev.h>
  41
  42 extern int xen_boot_debug;
  43
  44 /*
  45  * Internal structures and functions
  46  */
  47 int xendev_nounload = 0;
  48 void xendev_enumerate(int);
  49
  50 /*
  51  * Interface routines
  52  */
  53
  54 static struct modlmisc modlmisc = {
  55         &mod_miscops, "virtual device probe"
  56 };
  57
  58 static struct modlinkage modlinkage = {
  59         MODREV_1, (void *)&modlmisc, NULL
  60 };
  61
  62 int
  63 _init(void)
  64 {
  65         int     err;
  66
  67         if ((err = mod_install(&modlinkage)) != 0)
  68                 return (err);
  69
  70         impl_bus_add_probe(xendev_enumerate);
  71         return (0);
  72 }
  73
  74 int
  75 _fini(void)
  76 {
  77         int     err;
  78
  79         if (xendev_nounload)
  80                 return (EBUSY);
  81
  82         if ((err = mod_remove(&modlinkage)) != 0)
  83                 return (err);
  84
  85         impl_bus_delete_probe(xendev_enumerate);
  86         return (0);
  87 }
  88
  89 int
  90 _info(struct modinfo *modinfop)
  91 {
  92         return (mod_info(&modlinkage, modinfop));
  93 }
  94
  95
  96 /*
  97  * This functions is invoked twice, first time with reprogram=0 to
  98  * set up the xpvd portion of the device tree. The second time is
  99  * ignored.
 100  */
 101 void
 102 xendev_enumerate(int reprogram)
 103 {
 104         dev_info_t *dip;
 105
 106         if (reprogram != 0)
 107                 return;
 108
 109         ndi_devi_alloc_sleep(ddi_root_node(), "xpvd",
 110             (pnode_t)DEVI_SID_NODEID, &dip);
 111
 112         (void) ndi_devi_bind_driver(dip, 0);
 113
 114         /*
 115          * Too early to enumerate split device drivers in domU
 116          * since we need to create taskq thread during enumeration.
 117          * So, we only enumerate softdevs and console here.
 118          */
 119         xendev_enum_all(dip, B_TRUE);
 120 }