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 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 /*
27 * DLPI stub driver; currently supports VNI and IPMP stub devices.
28 */
29
30 #include <sys/conf.h>
31 #include <sys/ddi.h>
32 #include <sys/sunddi.h>
33 #include <sys/dlpi.h>
34 #include <sys/stat.h>
35 #include <sys/strsun.h>
36 #include <sys/stropts.h>
37 #include <sys/types.h>
38 #include <sys/id_space.h>
39 #include <sys/sysmacros.h>
40 #include <sys/kmem.h>
41 #include <sys/modctl.h>
42 #include <sys/mkdev.h>
43 #include <sys/sdt.h>
44
45 #include "dlpistub_impl.h"
46
47 static id_space_t *ds_minors;
48 static dev_info_t *ds_dip;
49
50 /*
51 * DL_INFO_ACK template.
52 */
53 static dl_info_ack_t ds_infoack = {
54 DL_INFO_ACK, /* dl_primitive */
55 0, /* dl_max_sdu */
56 0, /* dl_min_sdu */
57 0, /* dl_addr_length */
58 0, /* dl_mac_type */
59 0, /* dl_reserved */
60 0, /* dl_current_state */
61 0, /* dl_sap_length */
62 DL_CLDLS, /* dl_service_mode */
63 0, /* dl_qos_length */
64 0, /* dl_qos_offset */
65 0, /* dl_qos_range_length */
66 0, /* dl_qos_range_offset */
67 DL_STYLE2, /* dl_provider_style */
68 0, /* dl_addr_offset */
69 DL_VERSION_2, /* dl_version */
70 0, /* dl_brdcst_addr_length */
71 0, /* dl_brdcst_addr_offset */
72 0 /* dl_growth */
73 };
74
75 static int
76 ds_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
77 {
78 if (cmd != DDI_ATTACH)
79 return (DDI_FAILURE);
80
81 if (ddi_create_minor_node(dip, "vni", S_IFCHR, DS_MINOR_VNI,
82 DDI_PSEUDO, 0) == DDI_FAILURE ||
83 ddi_create_minor_node(dip, "ipmpstub", S_IFCHR, DS_MINOR_IPMP,
84 DDI_PSEUDO, 0) == DDI_FAILURE) {
85 ddi_remove_minor_node(dip, NULL);
86 cmn_err(CE_NOTE, "ds_attach: cannot create minor nodes");
87 return (DDI_FAILURE);
88 }
89
90 ds_dip = dip;
91 ds_minors = id_space_create("ds_minors", DS_MINOR_START, MAXMIN32);
92 return (DDI_SUCCESS);
93 }
94
95 static int
96 ds_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
97 {
98 if (cmd != DDI_DETACH)
99 return (DDI_FAILURE);
100
101 id_space_destroy(ds_minors);
102 ds_minors = NULL;
103 ASSERT(dip == ds_dip);
104 ddi_remove_minor_node(dip, NULL);
105 ds_dip = NULL;
106 return (DDI_SUCCESS);
107 }
108
109 /* ARGSUSED */
110 static int
111 ds_devinfo(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
112 {
113 int error = DDI_FAILURE;
114
115 switch (infocmd) {
116 case DDI_INFO_DEVT2INSTANCE:
117 *result = (void *)0;
118 error = DDI_SUCCESS;
119 break;
120 case DDI_INFO_DEVT2DEVINFO:
121 if (ds_dip != NULL) {
122 *result = ds_dip;
123 error = DDI_SUCCESS;
124 }
125 break;
126 }
127 return (error);
128 }
129
130 /* ARGSUSED */
131 static int
132 ds_open(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp)
133 {
134 int type;
135 dlpistub_t *dsp;
136
137 if (sflag == CLONEOPEN || sflag == MODOPEN)
138 return (EINVAL);
139
140 if (q->q_ptr != NULL)
141 return (0);
142
143 switch (getminor(*devp)) {
144 case DS_MINOR_VNI:
145 type = SUNW_DL_VNI;
146 break;
147 case DS_MINOR_IPMP:
148 type = SUNW_DL_IPMP;
149 break;
150 default:
151 return (ENXIO);
152 }
153
154 dsp = kmem_zalloc(sizeof (dlpistub_t), KM_SLEEP);
155 dsp->ds_type = type;
156 dsp->ds_minor = (minor_t)id_alloc(ds_minors);
157 dsp->ds_state = DL_UNATTACHED;
158 *devp = makedevice(getmajor(*devp), dsp->ds_minor);
159 q->q_ptr = WR(q)->q_ptr = dsp;
160 qprocson(q);
161
162 return (0);
163 }
164
165 /* ARGSUSED */
166 static int
167 ds_close(queue_t *q, int flag, cred_t *credp)
168 {
169 dlpistub_t *dsp = q->q_ptr;
170
171 qprocsoff(q);
172 q->q_ptr = WR(q)->q_ptr = NULL;
173
174 id_free(ds_minors, dsp->ds_minor);
175 kmem_free(dsp, sizeof (dlpistub_t));
176
177 return (0);
178 }
179
180 static int
181 ds_badprim(queue_t *q, mblk_t *mp, t_scalar_t prim)
182 {
183 dlerrorack(q, mp, prim, DL_BADPRIM, 0);
184 return (0);
185 }
186
187 static int
188 ds_outstate(queue_t *q, mblk_t *mp, t_scalar_t prim)
189 {
190 dlerrorack(q, mp, prim, DL_OUTSTATE, 0);
191 return (0);
192 }
193
194 static int
195 ds_wput(queue_t *q, mblk_t *mp)
196 {
197 union DL_primitives *dlp;
198 dl_info_ack_t *dlip;
199 dlpistub_t *dsp = q->q_ptr;
200 t_scalar_t prim;
201
202 switch (DB_TYPE(mp)) {
203 case M_PROTO:
204 case M_PCPROTO:
205 if (MBLKL(mp) < sizeof (t_scalar_t)) {
206 dlerrorack(q, mp, DL_PRIM_INVAL, DL_UNSUPPORTED, 0);
207 return (0);
208 }
209
210 dlp = (void *)mp->b_rptr;
211 prim = dlp->dl_primitive;
212 switch (prim) {
213 case DL_ATTACH_REQ:
214 if (MBLKL(mp) < DL_ATTACH_REQ_SIZE)
215 return (ds_badprim(q, mp, prim));
216
217 if (dsp->ds_state != DL_UNATTACHED)
218 return (ds_outstate(q, mp, prim));
219
220 dsp->ds_state = DL_UNBOUND;
221 dlokack(q, mp, DL_ATTACH_REQ);
222 break;
223
224 case DL_BIND_REQ:
225 if (MBLKL(mp) < DL_BIND_REQ_SIZE)
226 return (ds_badprim(q, mp, prim));
227
228 if (dsp->ds_state != DL_UNBOUND)
229 return (ds_outstate(q, mp, prim));
230
231 dsp->ds_state = DL_IDLE;
232 dlbindack(q, mp, dlp->bind_req.dl_sap, NULL, 0, 0, 0);
233 break;
234
235 case DL_INFO_REQ:
236 if (MBLKL(mp) < DL_INFO_REQ_SIZE)
237 return (ds_badprim(q, mp, prim));
238
239 mp = mexchange(q, mp, sizeof (dl_info_ack_t),
240 M_PCPROTO, DL_INFO_ACK);
241 if (mp != NULL) {
242 dlip = (void *)mp->b_rptr;
243 *dlip = ds_infoack;
244 dlip->dl_mac_type = dsp->ds_type;
245 dlip->dl_current_state = dsp->ds_state;
246 qreply(q, mp);
247 }
248 break;
249
250 case DL_PHYS_ADDR_REQ:
251 if (MBLKL(mp) < DL_PHYS_ADDR_REQ_SIZE)
252 return (ds_badprim(q, mp, prim));
253
254 dlphysaddrack(q, mp, NULL, 0);
255 break;
256
257 case DL_UNBIND_REQ:
258 if (MBLKL(mp) < DL_UNBIND_REQ_SIZE)
259 return (ds_badprim(q, mp, prim));
260
261 if (dsp->ds_state != DL_IDLE)
262 return (ds_outstate(q, mp, prim));
263
264 dsp->ds_state = DL_UNBOUND;
265 dlokack(q, mp, DL_UNBIND_REQ);
266 break;
267
268 case DL_DETACH_REQ:
269 if (MBLKL(mp) < DL_DETACH_REQ_SIZE)
270 return (ds_badprim(q, mp, prim));
271
272 if (dsp->ds_state != DL_UNBOUND)
273 return (ds_outstate(q, mp, prim));
274
275 dsp->ds_state = DL_UNATTACHED;
276 dlokack(q, mp, DL_DETACH_REQ);
277 break;
278
279 case DL_UNITDATA_REQ:
280 DTRACE_PROBE2(dlpistub__data, dlpistub_t *, dsp,
281 mblk_t *, mp);
282 freemsg(mp);
283 break;
284
285 default:
286 dlerrorack(q, mp, prim, DL_UNSUPPORTED, 0);
287 }
288 break;
289
290 case M_IOCTL:
291 miocnak(q, mp, 0, EINVAL);
292 break;
293
294 case M_FLUSH:
295 *mp->b_rptr &= ~FLUSHW;
296 if (*mp->b_rptr & FLUSHR)
297 qreply(q, mp);
298 else
299 freemsg(mp);
300 break;
301 default:
302 freemsg(mp);
303 break;
304 }
305
306 return (0);
307 }
308
309 static struct module_info ds_minfo = {
310 DS_IDNUM, /* mi_idnum */
311 "dlpistub", /* mi_idname */
312 0, /* mi_minpsz */
313 INFPSZ, /* mi_maxpsz */
314 0, /* mi_hiwat */
315 0, /* mi_lowat */
316 };
317
318 static struct qinit ds_rinit = {
319 NULL, /* qi_putp */
320 NULL, /* qi_srvp */
321 ds_open, /* qi_qopen */
322 ds_close, /* qi_qclose */
323 NULL, /* qi_qadmin */
324 &ds_minfo, /* qi_minfo */
325 };
326
327 static struct qinit ds_winit = {
328 ds_wput, /* qi_putp */
329 NULL, /* qi_srvp */
330 NULL, /* qi_qopen */
331 NULL, /* qi_qclose */
332 NULL, /* qi_qadmin */
333 &ds_minfo, /* qi_minfo */
334 };
335
336 static struct streamtab ds_info = {
337 &ds_rinit, /* st_rdinit */
338 &ds_winit /* st_wrinit */
339 };
340
341 DDI_DEFINE_STREAM_OPS(ds_ops, nulldev, nulldev, ds_attach, ds_detach,
342 nodev, ds_devinfo, D_MP|D_MTPERMOD, &ds_info, ddi_quiesce_not_supported);
343
344 static struct modldrv modldrv = {
345 &mod_driverops,
346 "DLPI stub driver",
347 &ds_ops,
348 };
349
350 static struct modlinkage modlinkage = {
351 MODREV_1, &modldrv, NULL
352 };
353
354 int
355 _init(void)
356 {
357 return (mod_install(&modlinkage));
358 }
359
360 int
361 _fini(void)
362 {
363 return (mod_remove(&modlinkage));
364 }
365
366 int
367 _info(struct modinfo *modinfop)
368 {
369 return (mod_info(&modlinkage, modinfop));
370 }