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[FreeBSD/releng/10.3.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         KASSERT(softc != NULL, ("CTL is not initialized"));
149         port->ctl_softc = softc;
150
151         mtx_lock(&softc->ctl_lock);
152         if (port->targ_port >= 0)
153                 port_num = port->targ_port;
154         else
155                 port_num = ctl_ffz(softc->ctl_port_mask,
156                     softc->port_min, softc->port_max);
157         if ((port_num < 0) ||
158             (ctl_set_mask(softc->ctl_port_mask, port_num) < 0)) {
159                 mtx_unlock(&softc->ctl_lock);
160                 return (1);
161         }
162         softc->num_ports++;
163         mtx_unlock(&softc->ctl_lock);
164
165         /*
166          * Initialize the initiator and portname mappings
167          */
168         port->max_initiators = CTL_MAX_INIT_PER_PORT;
169         port->wwpn_iid = malloc(sizeof(*port->wwpn_iid) * port->max_initiators,
170             M_CTL, M_NOWAIT | M_ZERO);
171         if (port->wwpn_iid == NULL) {
172                 retval = ENOMEM;
173                 goto error;
174         }
175
176         /*
177          * We add 20 to whatever the caller requests, so he doesn't get
178          * burned by queueing things back to the pending sense queue.  In
179          * theory, there should probably only be one outstanding item, at
180          * most, on the pending sense queue for a LUN.  We'll clear the
181          * pending sense queue on the next command, whether or not it is
182          * a REQUEST SENSE.
183          */
184         retval = ctl_pool_create(softc, port->port_name,
185                                  port->num_requested_ctl_io + 20, &pool);
186         if (retval != 0) {
187                 free(port->wwpn_iid, M_CTL);
188 error:
189                 port->targ_port = -1;
190                 mtx_lock(&softc->ctl_lock);
191                 ctl_clear_mask(softc->ctl_port_mask, port_num);
192                 mtx_unlock(&softc->ctl_lock);
193                 return (retval);
194         }
195         port->ctl_pool_ref = pool;
196
197         if (port->options.stqh_first == NULL)
198                 STAILQ_INIT(&port->options);
199
200         mtx_lock(&softc->ctl_lock);
201         port->targ_port = port_num;
202         STAILQ_INSERT_TAIL(&port->frontend->port_list, port, fe_links);
203         for (tport = NULL, nport = STAILQ_FIRST(&softc->port_list);
204             nport != NULL && nport->targ_port < port_num;
205             tport = nport, nport = STAILQ_NEXT(tport, links)) {
206         }
207         if (tport)
208                 STAILQ_INSERT_AFTER(&softc->port_list, tport, port, links);
209         else
210                 STAILQ_INSERT_HEAD(&softc->port_list, port, links);
211         softc->ctl_ports[port->targ_port] = port;
212         mtx_unlock(&softc->ctl_lock);
213
214         return (retval);
215 }
216
217 int
218 ctl_port_deregister(struct ctl_port *port)
219 {
220         struct ctl_softc *softc = port->ctl_softc;
221         struct ctl_io_pool *pool;
222         int retval, i;
223
224         retval = 0;
225
226         pool = (struct ctl_io_pool *)port->ctl_pool_ref;
227
228         if (port->targ_port == -1) {
229                 retval = 1;
230                 goto bailout;
231         }
232
233         mtx_lock(&softc->ctl_lock);
234         STAILQ_REMOVE(&softc->port_list, port, ctl_port, links);
235         STAILQ_REMOVE(&port->frontend->port_list, port, ctl_port, fe_links);
236         softc->num_ports--;
237         ctl_clear_mask(softc->ctl_port_mask, port->targ_port);
238         softc->ctl_ports[port->targ_port] = NULL;
239         mtx_unlock(&softc->ctl_lock);
240
241         ctl_pool_free(pool);
242         ctl_free_opts(&port->options);
243
244         ctl_lun_map_deinit(port);
245         free(port->port_devid, M_CTL);
246         port->port_devid = NULL;
247         free(port->target_devid, M_CTL);
248         port->target_devid = NULL;
249         free(port->init_devid, M_CTL);
250         port->init_devid = NULL;
251         for (i = 0; i < port->max_initiators; i++)
252                 free(port->wwpn_iid[i].name, M_CTL);
253         free(port->wwpn_iid, M_CTL);
254
255 bailout:
256         return (retval);
257 }
258
259 void
260 ctl_port_set_wwns(struct ctl_port *port, int wwnn_valid, uint64_t wwnn,
261                       int wwpn_valid, uint64_t wwpn)
262 {
263         struct scsi_vpd_id_descriptor *desc;
264         int len, proto;
265
266         if (port->port_type == CTL_PORT_FC)
267                 proto = SCSI_PROTO_FC << 4;
268         else if (port->port_type == CTL_PORT_ISCSI)
269                 proto = SCSI_PROTO_ISCSI << 4;
270         else
271                 proto = SCSI_PROTO_SPI << 4;
272
273         if (wwnn_valid) {
274                 port->wwnn = wwnn;
275
276                 free(port->target_devid, M_CTL);
277
278                 len = sizeof(struct scsi_vpd_device_id) + CTL_WWPN_LEN;
279                 port->target_devid = malloc(sizeof(struct ctl_devid) + len,
280                     M_CTL, M_WAITOK | M_ZERO);
281                 port->target_devid->len = len;
282                 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data;
283                 desc->proto_codeset = proto | SVPD_ID_CODESET_BINARY;
284                 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET |
285                     SVPD_ID_TYPE_NAA;
286                 desc->length = CTL_WWPN_LEN;
287                 scsi_u64to8b(port->wwnn, desc->identifier);
288         }
289
290         if (wwpn_valid) {
291                 port->wwpn = wwpn;
292
293                 free(port->port_devid, M_CTL);
294
295                 len = sizeof(struct scsi_vpd_device_id) + CTL_WWPN_LEN;
296                 port->port_devid = malloc(sizeof(struct ctl_devid) + len,
297                     M_CTL, M_WAITOK | M_ZERO);
298                 port->port_devid->len = len;
299                 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data;
300                 desc->proto_codeset = proto | SVPD_ID_CODESET_BINARY;
301                 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT |
302                     SVPD_ID_TYPE_NAA;
303                 desc->length = CTL_WWPN_LEN;
304                 scsi_u64to8b(port->wwpn, desc->identifier);
305         }
306 }
307
308 void
309 ctl_port_online(struct ctl_port *port)
310 {
311         struct ctl_softc *softc = port->ctl_softc;
312         struct ctl_lun *lun;
313         const char *value;
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         if (softc->is_single == 0) {
333                 value = ctl_get_opt(&port->options, "ha_shared");
334                 if (value != NULL && strcmp(value, "on") == 0)
335                         port->status |= CTL_PORT_STATUS_HA_SHARED;
336                 else
337                         port->status &= ~CTL_PORT_STATUS_HA_SHARED;
338         }
339         port->status |= CTL_PORT_STATUS_ONLINE;
340         STAILQ_FOREACH(lun, &softc->lun_list, links) {
341                 if (ctl_lun_map_to_port(port, lun->lun) >= CTL_MAX_LUNS)
342                         continue;
343                 mtx_lock(&lun->lun_lock);
344                 ctl_est_ua_all(lun, -1, CTL_UA_INQ_CHANGE);
345                 mtx_unlock(&lun->lun_lock);
346         }
347         mtx_unlock(&softc->ctl_lock);
348         ctl_isc_announce_port(port);
349 }
350
351 void
352 ctl_port_offline(struct ctl_port *port)
353 {
354         struct ctl_softc *softc = port->ctl_softc;
355         struct ctl_lun *lun;
356         uint32_t l;
357
358         if (port->port_offline != NULL)
359                 port->port_offline(port->onoff_arg);
360         if (port->lun_disable != NULL) {
361                 if (port->lun_map) {
362                         for (l = 0; l < CTL_MAX_LUNS; l++) {
363                                 if (ctl_lun_map_from_port(port, l) >=
364                                     CTL_MAX_LUNS)
365                                         continue;
366                                 port->lun_disable(port->targ_lun_arg, l);
367                         }
368                 } else {
369                         STAILQ_FOREACH(lun, &softc->lun_list, links)
370                                 port->lun_disable(port->targ_lun_arg, lun->lun);
371                 }
372         }
373         mtx_lock(&softc->ctl_lock);
374         port->status &= ~CTL_PORT_STATUS_ONLINE;
375         STAILQ_FOREACH(lun, &softc->lun_list, links) {
376                 if (ctl_lun_map_to_port(port, lun->lun) >= CTL_MAX_LUNS)
377                         continue;
378                 mtx_lock(&lun->lun_lock);
379                 ctl_est_ua_all(lun, -1, CTL_UA_INQ_CHANGE);
380                 mtx_unlock(&lun->lun_lock);
381         }
382         mtx_unlock(&softc->ctl_lock);
383         ctl_isc_announce_port(port);
384 }
385
386 /*
387  * vim: ts=8
388  */