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
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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
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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_frontend_internal.h>
59 #include <cam/ctl/ctl_backend.h>
60 /* XXX KDM move defines from ctl_ioctl.h to somewhere else */
61 #include <cam/ctl/ctl_ioctl.h>
62 #include <cam/ctl/ctl_ha.h>
63 #include <cam/ctl/ctl_private.h>
64 #include <cam/ctl/ctl_debug.h>
66 extern struct ctl_softc *control_softc;
69 ctl_frontend_register(struct ctl_frontend *fe, int master_shelf)
71 struct ctl_io_pool *pool;
77 KASSERT(control_softc != NULL, ("CTL is not initialized"));
79 mtx_lock(&control_softc->ctl_lock);
80 port_num = ctl_ffz(&control_softc->ctl_port_mask, CTL_MAX_PORTS);
82 || (ctl_set_mask(&control_softc->ctl_port_mask, port_num) == -1)) {
84 mtx_unlock(&control_softc->ctl_lock);
87 control_softc->num_frontends++;
89 mtx_unlock(&control_softc->ctl_lock);
91 * We add 20 to whatever the caller requests, so he doesn't get
92 * burned by queueing things back to the pending sense queue. In
93 * theory, there should probably only be one outstanding item, at
94 * most, on the pending sense queue for a LUN. We'll clear the
95 * pending sense queue on the next command, whether or not it is
98 retval = ctl_pool_create(control_softc,
99 (fe->port_type != CTL_PORT_IOCTL) ?
100 CTL_POOL_FETD : CTL_POOL_IOCTL,
101 fe->num_requested_ctl_io + 20, &pool);
104 mtx_lock(&control_softc->ctl_lock);
105 ctl_clear_mask(&control_softc->ctl_port_mask, port_num);
106 mtx_unlock(&control_softc->ctl_lock);
110 mtx_lock(&control_softc->ctl_lock);
112 /* For now assume master shelf */
113 //fe->targ_port = port_num;
114 fe->targ_port = port_num + (master_shelf!=0 ? 0 : CTL_MAX_PORTS);
115 fe->max_initiators = CTL_MAX_INIT_PER_PORT;
116 STAILQ_INSERT_TAIL(&control_softc->fe_list, fe, links);
117 control_softc->ctl_ports[port_num] = fe;
119 mtx_unlock(&control_softc->ctl_lock);
121 fe->ctl_pool_ref = pool;
127 ctl_frontend_deregister(struct ctl_frontend *fe)
129 struct ctl_io_pool *pool;
135 pool = (struct ctl_io_pool *)fe->ctl_pool_ref;
137 if (fe->targ_port == -1) {
142 mtx_lock(&control_softc->ctl_lock);
143 STAILQ_REMOVE(&control_softc->fe_list, fe, ctl_frontend, links);
144 control_softc->num_frontends--;
145 port_num = (fe->targ_port < CTL_MAX_PORTS) ? fe->targ_port :
146 fe->targ_port - CTL_MAX_PORTS;
147 ctl_clear_mask(&control_softc->ctl_port_mask, port_num);
148 control_softc->ctl_ports[port_num] = NULL;
149 mtx_unlock(&control_softc->ctl_lock);
158 ctl_frontend_set_wwns(struct ctl_frontend *fe, int wwnn_valid, uint64_t wwnn,
159 int wwpn_valid, uint64_t wwpn)
169 ctl_frontend_online(struct ctl_frontend *fe)
171 fe->port_online(fe->onoff_arg);
172 /* XXX KDM need a lock here? */
173 fe->status |= CTL_PORT_STATUS_ONLINE;
177 ctl_frontend_offline(struct ctl_frontend *fe)
179 fe->port_offline(fe->onoff_arg);
180 /* XXX KDM need a lock here? */
181 fe->status &= ~CTL_PORT_STATUS_ONLINE;