1/*
2 * ppp_mod.c - modload support for PPP pseudo-device driver.
3 *
4 * Copyright (c) 1994 The Australian National University.
5 * All rights reserved.
6 *
7 * Permission to use, copy, modify, and distribute this software and its
8 * documentation is hereby granted, provided that the above copyright
9 * notice appears in all copies.  This software is provided without any
10 * warranty, express or implied. The Australian National University
11 * makes no representations about the suitability of this software for
12 * any purpose.
13 *
14 * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
15 * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
16 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
17 * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
18 * OF SUCH DAMAGE.
19 *
20 * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
21 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
22 * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
23 * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
24 * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
25 * OR MODIFICATIONS.
26 *
27 * $Id: ppp_mod.c,v 1.1.1.1 2008/10/15 03:30:13 james26_jang Exp $
28 */
29
30/*
31 * This file is used under Solaris 2.
32 */
33
34#include <sys/types.h>
35#include <sys/param.h>
36#include <sys/stat.h>
37#include <sys/conf.h>
38#include <sys/modctl.h>
39#include <sys/sunddi.h>
40#include <sys/ksynch.h>
41
42#ifdef __STDC__
43#define __P(x)	x
44#else
45#define __P(x)	()
46#endif
47
48static int ppp_identify __P((dev_info_t *));
49static int ppp_attach __P((dev_info_t *, ddi_attach_cmd_t));
50static int ppp_detach __P((dev_info_t *, ddi_detach_cmd_t));
51static int ppp_devinfo __P((dev_info_t *, ddi_info_cmd_t, void *, void **));
52
53extern struct streamtab pppinfo;
54extern krwlock_t ppp_lower_lock;
55
56static dev_info_t *ppp_dip;
57
58static struct cb_ops cb_ppp_ops = {
59    nulldev, nulldev, nodev, nodev,	/* cb_open, ... */
60    nodev, nodev, nodev, nodev,		/* cb_dump, ... */
61    nodev, nodev, nodev, nochpoll,	/* cb_devmap, ... */
62    ddi_prop_op,			/* cb_prop_op */
63    &pppinfo,				/* cb_stream */
64    D_NEW|D_MP|D_MTQPAIR|D_MTOUTPERIM|D_MTOCEXCL	/* cb_flag */
65};
66
67static struct dev_ops ppp_ops = {
68    DEVO_REV,				/* devo_rev */
69    0,					/* devo_refcnt */
70    ppp_devinfo,			/* devo_getinfo */
71    ppp_identify,			/* devo_identify */
72    nulldev,				/* devo_probe */
73    ppp_attach,				/* devo_attach */
74    ppp_detach,				/* devo_detach */
75    nodev,				/* devo_reset */
76    &cb_ppp_ops,			/* devo_cb_ops */
77    NULL				/* devo_bus_ops */
78};
79
80/*
81 * Module linkage information
82 */
83
84static struct modldrv modldrv = {
85    &mod_driverops,			/* says this is a pseudo driver */
86    "PPP-2.3 multiplexing driver",
87    &ppp_ops				/* driver ops */
88};
89
90static struct modlinkage modlinkage = {
91    MODREV_1,
92    (void *) &modldrv,
93    NULL
94};
95
96int
97_init(void)
98{
99    return mod_install(&modlinkage);
100}
101
102int
103_fini(void)
104{
105    return mod_remove(&modlinkage);
106}
107
108int
109_info(mip)
110    struct modinfo *mip;
111{
112    return mod_info(&modlinkage, mip);
113}
114
115static int
116ppp_identify(dip)
117    dev_info_t *dip;
118{
119    return strcmp(ddi_get_name(dip), "ppp") == 0? DDI_IDENTIFIED:
120	DDI_NOT_IDENTIFIED;
121}
122
123static int
124ppp_attach(dip, cmd)
125    dev_info_t *dip;
126    ddi_attach_cmd_t cmd;
127{
128
129    if (cmd != DDI_ATTACH)
130	return DDI_FAILURE;
131    if (ddi_create_minor_node(dip, "ppp", S_IFCHR, 0, DDI_PSEUDO, CLONE_DEV)
132	== DDI_FAILURE) {
133	ddi_remove_minor_node(dip, NULL);
134	return DDI_FAILURE;
135    }
136    rw_init(&ppp_lower_lock, NULL, RW_DRIVER, NULL);
137    return DDI_SUCCESS;
138}
139
140static int
141ppp_detach(dip, cmd)
142    dev_info_t *dip;
143    ddi_detach_cmd_t cmd;
144{
145    rw_destroy(&ppp_lower_lock);
146    ddi_remove_minor_node(dip, NULL);
147    return DDI_SUCCESS;
148}
149
150static int
151ppp_devinfo(dip, cmd, arg, result)
152    dev_info_t *dip;
153    ddi_info_cmd_t cmd;
154    void *arg;
155    void **result;
156{
157    int error;
158
159    error = DDI_SUCCESS;
160    switch (cmd) {
161    case DDI_INFO_DEVT2DEVINFO:
162	if (ppp_dip == NULL)
163	    error = DDI_FAILURE;
164	else
165	    *result = (void *) ppp_dip;
166	break;
167    case DDI_INFO_DEVT2INSTANCE:
168	*result = NULL;
169	break;
170    default:
171	error = DDI_FAILURE;
172    }
173    return error;
174}
175