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[FreeBSD/stable/10.git] / sys / cam / ctl / ctl_frontend.c
1 /*-
2  * Copyright (c) 2003 Silicon Graphics International Corp.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions, and the following disclaimer,
10  *    without modification.
11  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
12  *    substantially similar to the "NO WARRANTY" disclaimer below
13  *    ("Disclaimer") and any redistribution must be conditioned upon
14  *    including a substantially similar Disclaimer requirement for further
15  *    binary redistribution.
16  *
17  * NO WARRANTY
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
26  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
27  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28  * POSSIBILITY OF SUCH DAMAGES.
29  *
30  * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_frontend.c#4 $
31  */
32 /*
33  * CAM Target Layer front end interface code
34  *
35  * Author: Ken Merry <ken@FreeBSD.org>
36  */
37
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/kernel.h>
44 #include <sys/types.h>
45 #include <sys/malloc.h>
46 #include <sys/lock.h>
47 #include <sys/mutex.h>
48 #include <sys/condvar.h>
49 #include <sys/endian.h>
50 #include <sys/queue.h>
51 #include <sys/sysctl.h>
52
53 #include <cam/scsi/scsi_all.h>
54 #include <cam/scsi/scsi_da.h>
55 #include <cam/ctl/ctl_io.h>
56 #include <cam/ctl/ctl.h>
57 #include <cam/ctl/ctl_frontend.h>
58 #include <cam/ctl/ctl_backend.h>
59 /* XXX KDM move defines from ctl_ioctl.h to somewhere else */
60 #include <cam/ctl/ctl_ioctl.h>
61 #include <cam/ctl/ctl_ha.h>
62 #include <cam/ctl/ctl_private.h>
63 #include <cam/ctl/ctl_debug.h>
64
65 extern struct ctl_softc *control_softc;
66
67 int
68 ctl_frontend_register(struct ctl_frontend *fe)
69 {
70         struct ctl_softc *softc = control_softc;
71         struct ctl_frontend *fe_tmp;
72
73         KASSERT(softc != NULL, ("CTL is not initialized"));
74
75         /*
76          * Sanity check, make sure this isn't a duplicate registration.
77          */
78         mtx_lock(&softc->ctl_lock);
79         STAILQ_FOREACH(fe_tmp, &softc->fe_list, links) {
80                 if (strcmp(fe_tmp->name, fe->name) == 0) {
81                         mtx_unlock(&softc->ctl_lock);
82                         return (-1);
83                 }
84         }
85         mtx_unlock(&softc->ctl_lock);
86         STAILQ_INIT(&fe->port_list);
87
88         /*
89          * Call the frontend's initialization routine.
90          */
91         if (fe->init != NULL)
92                 fe->init();
93
94         mtx_lock(&softc->ctl_lock);
95         softc->num_frontends++;
96         STAILQ_INSERT_TAIL(&softc->fe_list, fe, links);
97         mtx_unlock(&softc->ctl_lock);
98         return (0);
99 }
100
101 int
102 ctl_frontend_deregister(struct ctl_frontend *fe)
103 {
104         struct ctl_softc *softc = control_softc;
105
106         if (!STAILQ_EMPTY(&fe->port_list))
107                 return (-1);
108
109         mtx_lock(&softc->ctl_lock);
110         STAILQ_REMOVE(&softc->fe_list, fe, ctl_frontend, links);
111         softc->num_frontends--;
112         mtx_unlock(&softc->ctl_lock);
113
114         /*
115          * Call the frontend's shutdown routine.
116          */
117         if (fe->shutdown != NULL)
118                 fe->shutdown();
119         return (0);
120 }
121
122 struct ctl_frontend *
123 ctl_frontend_find(char *frontend_name)
124 {
125         struct ctl_softc *softc = control_softc;
126         struct ctl_frontend *fe;
127
128         mtx_lock(&softc->ctl_lock);
129         STAILQ_FOREACH(fe, &softc->fe_list, links) {
130                 if (strcmp(fe->name, frontend_name) == 0) {
131                         mtx_unlock(&softc->ctl_lock);
132                         return (fe);
133                 }
134         }
135         mtx_unlock(&softc->ctl_lock);
136         return (NULL);
137 }
138
139 int
140 ctl_port_register(struct ctl_port *port)
141 {
142         struct ctl_softc *softc = control_softc;
143         struct ctl_port *tport, *nport;
144         void *pool;
145         int port_num;
146         int retval;
147
148         retval = 0;
149
150         KASSERT(softc != NULL, ("CTL is not initialized"));
151
152         mtx_lock(&softc->ctl_lock);
153         if (port->targ_port >= 0)
154                 port_num = port->targ_port;
155         else
156                 port_num = ctl_ffz(softc->ctl_port_mask,
157                     softc->port_min, softc->port_max);
158         if ((port_num < 0) ||
159             (ctl_set_mask(softc->ctl_port_mask, port_num) < 0)) {
160                 mtx_unlock(&softc->ctl_lock);
161                 return (1);
162         }
163         softc->num_ports++;
164         mtx_unlock(&softc->ctl_lock);
165
166         /*
167          * Initialize the initiator and portname mappings
168          */
169         port->max_initiators = CTL_MAX_INIT_PER_PORT;
170         port->wwpn_iid = malloc(sizeof(*port->wwpn_iid) * port->max_initiators,
171             M_CTL, M_NOWAIT | M_ZERO);
172         if (port->wwpn_iid == NULL) {
173                 retval = ENOMEM;
174                 goto error;
175         }
176
177         /*
178          * We add 20 to whatever the caller requests, so he doesn't get
179          * burned by queueing things back to the pending sense queue.  In
180          * theory, there should probably only be one outstanding item, at
181          * most, on the pending sense queue for a LUN.  We'll clear the
182          * pending sense queue on the next command, whether or not it is
183          * a REQUEST SENSE.
184          */
185         retval = ctl_pool_create(softc, port->port_name,
186                                  port->num_requested_ctl_io + 20, &pool);
187         if (retval != 0) {
188                 free(port->wwpn_iid, M_CTL);
189 error:
190                 port->targ_port = -1;
191                 mtx_lock(&softc->ctl_lock);
192                 ctl_clear_mask(softc->ctl_port_mask, port_num);
193                 mtx_unlock(&softc->ctl_lock);
194                 return (retval);
195         }
196         port->ctl_pool_ref = pool;
197
198         if (port->options.stqh_first == NULL)
199                 STAILQ_INIT(&port->options);
200
201         mtx_lock(&softc->ctl_lock);
202         port->targ_port = port_num;
203         STAILQ_INSERT_TAIL(&port->frontend->port_list, port, fe_links);
204         for (tport = NULL, nport = STAILQ_FIRST(&softc->port_list);
205             nport != NULL && nport->targ_port < port_num;
206             tport = nport, nport = STAILQ_NEXT(tport, links)) {
207         }
208         if (tport)
209                 STAILQ_INSERT_AFTER(&softc->port_list, tport, port, links);
210         else
211                 STAILQ_INSERT_HEAD(&softc->port_list, port, links);
212         softc->ctl_ports[port->targ_port] = port;
213         mtx_unlock(&softc->ctl_lock);
214
215         return (retval);
216 }
217
218 int
219 ctl_port_deregister(struct ctl_port *port)
220 {
221         struct ctl_softc *softc = control_softc;
222         struct ctl_io_pool *pool;
223         int retval, i;
224
225         retval = 0;
226
227         pool = (struct ctl_io_pool *)port->ctl_pool_ref;
228
229         if (port->targ_port == -1) {
230                 retval = 1;
231                 goto bailout;
232         }
233
234         mtx_lock(&softc->ctl_lock);
235         STAILQ_REMOVE(&softc->port_list, port, ctl_port, links);
236         STAILQ_REMOVE(&port->frontend->port_list, port, ctl_port, fe_links);
237         softc->num_ports--;
238         ctl_clear_mask(softc->ctl_port_mask, port->targ_port);
239         softc->ctl_ports[port->targ_port] = NULL;
240         mtx_unlock(&softc->ctl_lock);
241
242         ctl_pool_free(pool);
243         ctl_free_opts(&port->options);
244
245         ctl_lun_map_deinit(port);
246         free(port->port_devid, M_CTL);
247         port->port_devid = NULL;
248         free(port->target_devid, M_CTL);
249         port->target_devid = NULL;
250         free(port->init_devid, M_CTL);
251         port->init_devid = NULL;
252         for (i = 0; i < port->max_initiators; i++)
253                 free(port->wwpn_iid[i].name, M_CTL);
254         free(port->wwpn_iid, M_CTL);
255
256 bailout:
257         return (retval);
258 }
259
260 void
261 ctl_port_set_wwns(struct ctl_port *port, int wwnn_valid, uint64_t wwnn,
262                       int wwpn_valid, uint64_t wwpn)
263 {
264         struct scsi_vpd_id_descriptor *desc;
265         int len, proto;
266
267         if (port->port_type == CTL_PORT_FC)
268                 proto = SCSI_PROTO_FC << 4;
269         else if (port->port_type == CTL_PORT_ISCSI)
270                 proto = SCSI_PROTO_ISCSI << 4;
271         else
272                 proto = SCSI_PROTO_SPI << 4;
273
274         if (wwnn_valid) {
275                 port->wwnn = wwnn;
276
277                 free(port->target_devid, M_CTL);
278
279                 len = sizeof(struct scsi_vpd_device_id) + CTL_WWPN_LEN;
280                 port->target_devid = malloc(sizeof(struct ctl_devid) + len,
281                     M_CTL, M_WAITOK | M_ZERO);
282                 port->target_devid->len = len;
283                 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data;
284                 desc->proto_codeset = proto | SVPD_ID_CODESET_BINARY;
285                 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET |
286                     SVPD_ID_TYPE_NAA;
287                 desc->length = CTL_WWPN_LEN;
288                 scsi_u64to8b(port->wwnn, desc->identifier);
289         }
290
291         if (wwpn_valid) {
292                 port->wwpn = wwpn;
293
294                 free(port->port_devid, M_CTL);
295
296                 len = sizeof(struct scsi_vpd_device_id) + CTL_WWPN_LEN;
297                 port->port_devid = malloc(sizeof(struct ctl_devid) + len,
298                     M_CTL, M_WAITOK | M_ZERO);
299                 port->port_devid->len = len;
300                 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data;
301                 desc->proto_codeset = proto | SVPD_ID_CODESET_BINARY;
302                 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT |
303                     SVPD_ID_TYPE_NAA;
304                 desc->length = CTL_WWPN_LEN;
305                 scsi_u64to8b(port->wwpn, desc->identifier);
306         }
307 }
308
309 void
310 ctl_port_online(struct ctl_port *port)
311 {
312         struct ctl_softc *softc = control_softc;
313         struct ctl_lun *lun;
314         uint32_t l;
315
316         if (port->lun_enable != NULL) {
317                 if (port->lun_map) {
318                         for (l = 0; l < CTL_MAX_LUNS; l++) {
319                                 if (ctl_lun_map_from_port(port, l) >=
320                                     CTL_MAX_LUNS)
321                                         continue;
322                                 port->lun_enable(port->targ_lun_arg, l);
323                         }
324                 } else {
325                         STAILQ_FOREACH(lun, &softc->lun_list, links)
326                                 port->lun_enable(port->targ_lun_arg, lun->lun);
327                 }
328         }
329         if (port->port_online != NULL)
330                 port->port_online(port->onoff_arg);
331         mtx_lock(&softc->ctl_lock);
332         port->status |= CTL_PORT_STATUS_ONLINE;
333         STAILQ_FOREACH(lun, &softc->lun_list, links) {
334                 if (ctl_lun_map_to_port(port, lun->lun) >= CTL_MAX_LUNS)
335                         continue;
336                 mtx_lock(&lun->lun_lock);
337                 ctl_est_ua_all(lun, -1, CTL_UA_INQ_CHANGE);
338                 mtx_unlock(&lun->lun_lock);
339         }
340         mtx_unlock(&softc->ctl_lock);
341         ctl_isc_announce_port(port);
342 }
343
344 void
345 ctl_port_offline(struct ctl_port *port)
346 {
347         struct ctl_softc *softc = control_softc;
348         struct ctl_lun *lun;
349         uint32_t l;
350
351         if (port->port_offline != NULL)
352                 port->port_offline(port->onoff_arg);
353         if (port->lun_disable != NULL) {
354                 if (port->lun_map) {
355                         for (l = 0; l < CTL_MAX_LUNS; l++) {
356                                 if (ctl_lun_map_from_port(port, l) >=
357                                     CTL_MAX_LUNS)
358                                         continue;
359                                 port->lun_disable(port->targ_lun_arg, l);
360                         }
361                 } else {
362                         STAILQ_FOREACH(lun, &softc->lun_list, links)
363                                 port->lun_disable(port->targ_lun_arg, lun->lun);
364                 }
365         }
366         mtx_lock(&softc->ctl_lock);
367         port->status &= ~CTL_PORT_STATUS_ONLINE;
368         STAILQ_FOREACH(lun, &softc->lun_list, links) {
369                 if (ctl_lun_map_to_port(port, lun->lun) >= CTL_MAX_LUNS)
370                         continue;
371                 mtx_lock(&lun->lun_lock);
372                 ctl_est_ua_all(lun, -1, CTL_UA_INQ_CHANGE);
373                 mtx_unlock(&lun->lun_lock);
374         }
375         mtx_unlock(&softc->ctl_lock);
376         ctl_isc_announce_port(port);
377 }
378
379 /*
380  * vim: ts=8
381  */