2 * Copyright (c) 2003 Silicon Graphics International Corp.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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.
30 * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_frontend.c#4 $
33 * CAM Target Layer front end interface code
35 * Author: Ken Merry <ken@FreeBSD.org>
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
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>
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>
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>
65 extern struct ctl_softc *control_softc;
68 ctl_frontend_register(struct ctl_frontend *fe)
70 struct ctl_softc *softc = control_softc;
71 struct ctl_frontend *fe_tmp;
73 KASSERT(softc != NULL, ("CTL is not initialized"));
76 * Sanity check, make sure this isn't a duplicate registration.
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);
85 mtx_unlock(&softc->ctl_lock);
86 STAILQ_INIT(&fe->port_list);
89 * Call the frontend's initialization routine.
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);
102 ctl_frontend_deregister(struct ctl_frontend *fe)
104 struct ctl_softc *softc = control_softc;
106 if (!STAILQ_EMPTY(&fe->port_list))
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);
115 * Call the frontend's shutdown routine.
117 if (fe->shutdown != NULL)
122 struct ctl_frontend *
123 ctl_frontend_find(char *frontend_name)
125 struct ctl_softc *softc = control_softc;
126 struct ctl_frontend *fe;
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);
135 mtx_unlock(&softc->ctl_lock);
140 ctl_port_register(struct ctl_port *port)
142 struct ctl_softc *softc = control_softc;
143 struct ctl_port *tport, *nport;
150 KASSERT(softc != NULL, ("CTL is not initialized"));
152 mtx_lock(&softc->ctl_lock);
153 if (port->targ_port >= 0)
154 port_num = port->targ_port;
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);
164 mtx_unlock(&softc->ctl_lock);
167 * Initialize the initiator and portname mappings
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) {
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
185 retval = ctl_pool_create(softc, port->port_name,
186 port->num_requested_ctl_io + 20, &pool);
188 free(port->wwpn_iid, M_CTL);
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);
196 port->ctl_pool_ref = pool;
198 if (port->options.stqh_first == NULL)
199 STAILQ_INIT(&port->options);
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)) {
209 STAILQ_INSERT_AFTER(&softc->port_list, tport, port, links);
211 STAILQ_INSERT_HEAD(&softc->port_list, port, links);
212 softc->ctl_ports[port->targ_port] = port;
213 mtx_unlock(&softc->ctl_lock);
219 ctl_port_deregister(struct ctl_port *port)
221 struct ctl_softc *softc = control_softc;
222 struct ctl_io_pool *pool;
227 pool = (struct ctl_io_pool *)port->ctl_pool_ref;
229 if (port->targ_port == -1) {
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);
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);
243 ctl_free_opts(&port->options);
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);
261 ctl_port_set_wwns(struct ctl_port *port, int wwnn_valid, uint64_t wwnn,
262 int wwpn_valid, uint64_t wwpn)
264 struct scsi_vpd_id_descriptor *desc;
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;
272 proto = SCSI_PROTO_SPI << 4;
277 free(port->target_devid, M_CTL);
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 |
287 desc->length = CTL_WWPN_LEN;
288 scsi_u64to8b(port->wwnn, desc->identifier);
294 free(port->port_devid, M_CTL);
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 |
304 desc->length = CTL_WWPN_LEN;
305 scsi_u64to8b(port->wwpn, desc->identifier);
310 ctl_port_online(struct ctl_port *port)
312 struct ctl_softc *softc = control_softc;
316 if (port->lun_enable != NULL) {
318 for (l = 0; l < CTL_MAX_LUNS; l++) {
319 if (ctl_lun_map_from_port(port, l) >=
322 port->lun_enable(port->targ_lun_arg, l);
325 STAILQ_FOREACH(lun, &softc->lun_list, links)
326 port->lun_enable(port->targ_lun_arg, lun->lun);
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)
336 mtx_lock(&lun->lun_lock);
337 ctl_est_ua_all(lun, -1, CTL_UA_INQ_CHANGE);
338 mtx_unlock(&lun->lun_lock);
340 mtx_unlock(&softc->ctl_lock);
341 ctl_isc_announce_port(port);
345 ctl_port_offline(struct ctl_port *port)
347 struct ctl_softc *softc = control_softc;
351 if (port->port_offline != NULL)
352 port->port_offline(port->onoff_arg);
353 if (port->lun_disable != NULL) {
355 for (l = 0; l < CTL_MAX_LUNS; l++) {
356 if (ctl_lun_map_from_port(port, l) >=
359 port->lun_disable(port->targ_lun_arg, l);
362 STAILQ_FOREACH(lun, &softc->lun_list, links)
363 port->lun_disable(port->targ_lun_arg, lun->lun);
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)
371 mtx_lock(&lun->lun_lock);
372 ctl_est_ua_all(lun, -1, CTL_UA_INQ_CHANGE);
373 mtx_unlock(&lun->lun_lock);
375 mtx_unlock(&softc->ctl_lock);
376 ctl_isc_announce_port(port);