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 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26
27 /*
28 * generic mpxio leaf driver
29 */
30 #include <sys/types.h>
31 #include <sys/param.h>
32 #include <sys/errno.h>
33 #include <sys/uio.h>
34 #include <sys/buf.h>
35 #include <sys/modctl.h>
36 #include <sys/open.h>
37 #include <sys/kmem.h>
38 #include <sys/conf.h>
39 #include <sys/cmn_err.h>
40 #include <sys/stat.h>
41 #include <sys/ddi.h>
42 #include <sys/sunddi.h>
43 #include <sys/sunndi.h>
44
45
46 static int tcli_open(dev_t *, int, int, cred_t *);
47 static int tcli_close(dev_t, int, int, cred_t *);
48 static int tcli_read(dev_t, struct uio *, cred_t *);
49 static int tcli_write(dev_t, struct uio *, cred_t *);
50 static int tcli_ioctl(dev_t, int, intptr_t, int, cred_t *, int *);
51 static int tcli_attach(dev_info_t *, ddi_attach_cmd_t);
52 static int tcli_detach(dev_info_t *, ddi_detach_cmd_t);
53
54 static int tcli_info(dev_info_t *, ddi_info_cmd_t, void *, void **);
55
56 struct dstate {
57 dev_info_t *dip;
58 int oflag;
59 };
60
61 static void *dstates;
62
63 #define INST_TO_MINOR(i) (i)
64 #define MINOR_TO_INST(mn) (mn)
65
66 static struct cb_ops tcli_cb_ops = {
67 tcli_open, /* open */
68 tcli_close, /* close */
69 nodev, /* strategy */
70 nodev, /* print */
71 nodev, /* dump */
72 tcli_read, /* read */
73 tcli_write, /* write */
74 tcli_ioctl, /* ioctl */
75 nodev, /* devmap */
76 nodev, /* mmap */
77 nodev, /* segmap */
78 nochpoll, /* poll */
79 ddi_prop_op, /* prop_op */
80 NULL, /* streamtab */
81 D_NEW | D_MP | D_HOTPLUG, /* flag */
82 CB_REV, /* cb_rev */
83 nodev, /* aread */
84 nodev /* awrite */
85 };
86
87
88 static struct dev_ops tcli_ops = {
89 DEVO_REV, /* devo_rev */
90 0, /* refcnt */
91 tcli_info, /* getinfo */
92 nulldev, /* identify */
93 nulldev, /* probe */
94 tcli_attach, /* attach */
95 tcli_detach, /* detach */
96 nodev, /* reset */
97 &tcli_cb_ops, /* driver ops */
98 (struct bus_ops *)0, /* bus ops */
99 NULL, /* power */
100 ddi_quiesce_not_needed, /* quiesce */
101 };
102
103 static struct modldrv modldrv = {
104 &mod_driverops,
105 "vhci client test driver",
106 &tcli_ops
107 };
108
109 static struct modlinkage modlinkage = {
110 MODREV_1, { &modldrv, NULL }
111 };
112
113 int
114 _init(void)
115 {
116 int e;
117
118 if ((e = ddi_soft_state_init(&dstates,
119 sizeof (struct dstate), 0)) != 0) {
120 return (e);
121 }
122
123 if ((e = mod_install(&modlinkage)) != 0) {
124 ddi_soft_state_fini(&dstates);
125 }
126
127 return (e);
128 }
129
130 int
131 _fini(void)
132 {
133 int e;
134
135 if ((e = mod_remove(&modlinkage)) != 0) {
136 return (e);
137 }
138 ddi_soft_state_fini(&dstates);
139 return (e);
140 }
141
142 int
143 _info(struct modinfo *modinfop)
144 {
145 return (mod_info(&modlinkage, modinfop));
146 }
147
148 /*ARGSUSED*/
149 static int
150 tcli_attach(dev_info_t *devi, ddi_attach_cmd_t cmd)
151 {
152 int instance = ddi_get_instance(devi);
153 struct dstate *dstatep;
154 int rval;
155
156 if (cmd != DDI_ATTACH)
157 return (DDI_SUCCESS);
158
159 if (ddi_soft_state_zalloc(dstates, instance) != DDI_SUCCESS) {
160 cmn_err(CE_CONT, "%s%d: can't allocate state\n",
161 ddi_get_name(devi), instance);
162 return (DDI_FAILURE);
163 }
164
165 dstatep = ddi_get_soft_state(dstates, instance);
166 dstatep->dip = devi;
167
168 rval = ddi_create_minor_node(devi, "client", S_IFCHR,
169 (INST_TO_MINOR(instance)), DDI_PSEUDO, NULL);
170 if (rval == DDI_FAILURE) {
171 ddi_remove_minor_node(devi, NULL);
172 ddi_soft_state_free(dstates, instance);
173 cmn_err(CE_WARN, "%s%d: can't create minor nodes",
174 ddi_get_name(devi), instance);
175 return (DDI_FAILURE);
176 }
177
178 ddi_report_dev(devi);
179 return (DDI_SUCCESS);
180 }
181
182 /*ARGSUSED*/
183 static int
184 tcli_detach(dev_info_t *devi, ddi_detach_cmd_t cmd)
185 {
186 int instance;
187
188 if (cmd != DDI_DETACH)
189 return (DDI_SUCCESS);
190
191 ddi_remove_minor_node(devi, NULL);
192 instance = ddi_get_instance(devi);
193 ddi_soft_state_free(dstates, instance);
194 return (DDI_SUCCESS);
195 }
196
197 /* ARGSUSED */
198 static int
199 tcli_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
200 {
201 dev_t dev;
202 int instance;
203
204 if (infocmd != DDI_INFO_DEVT2INSTANCE)
205 return (DDI_FAILURE);
206
207 dev = (dev_t)arg;
208 instance = MINOR_TO_INST(getminor(dev));
209 *result = (void *)(uintptr_t)instance;
210 return (DDI_SUCCESS);
211 }
212
213
214 /*ARGSUSED*/
215 static int
216 tcli_open(dev_t *devp, int flag, int otyp, cred_t *cred)
217 {
218 minor_t minor;
219 struct dstate *dstatep;
220
221 if (otyp != OTYP_BLK && otyp != OTYP_CHR)
222 return (EINVAL);
223
224 minor = getminor(*devp);
225 if ((dstatep = ddi_get_soft_state(dstates,
226 MINOR_TO_INST(minor))) == NULL)
227 return (ENXIO);
228
229 dstatep->oflag = 1;
230
231 return (0);
232 }
233
234 /*ARGSUSED*/
235 static int
236 tcli_close(dev_t dev, int flag, int otyp, cred_t *cred)
237 {
238 struct dstate *dstatep;
239 minor_t minor = getminor(dev);
240
241 if (otyp != OTYP_BLK && otyp != OTYP_CHR)
242 return (EINVAL);
243
244 dstatep = ddi_get_soft_state(dstates, MINOR_TO_INST(minor));
245
246 if (dstatep == NULL)
247 return (ENXIO);
248
249 dstatep->oflag = 0;
250
251 return (0);
252 }
253
254 /*ARGSUSED*/
255 static int
256 tcli_ioctl(dev_t dev, int cmd, intptr_t arg, int mode, cred_t *credp,
257 int *rvalp)
258 {
259 struct dstate *dstatep;
260 int instance;
261
262 instance = MINOR_TO_INST(getminor(dev));
263 dstatep = ddi_get_soft_state(dstates, instance);
264
265 if (dstatep == NULL)
266 return (ENXIO);
267
268 return (0);
269 }
270
271 /*ARGSUSED*/
272 static int
273 tcli_read(dev_t dev, struct uio *uiop, cred_t *credp)
274 {
275 return (0);
276 }
277
278 /*ARGSUSED*/
279 static int
280 tcli_write(dev_t dev, struct uio *uiop, cred_t *credp)
281 {
282 return (0);
283 }