2 * Copyright (c) 2005-2008 Daniel Braniss <danny@cs.huji.ac.il>
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 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/sys/dev/iscsi/initiator/isc_cam.c,v 1.3 2008/11/25 07:17:11 scottl Exp $
29 #include <sys/param.h>
30 #include <sys/kernel.h>
31 #include <sys/callout.h>
34 #include <sys/systm.h>
35 #include <sys/malloc.h>
38 #include <sys/sysctl.h>
39 #include <sys/eventhandler.h>
40 #include <sys/mutex.h>
41 #include <sys/mutex2.h>
43 #include <bus/cam/cam.h>
44 #include <bus/cam/cam_ccb.h>
45 #include <bus/cam/cam_sim.h>
46 #include <bus/cam/cam_xpt_sim.h>
47 #include <bus/cam/cam_periph.h>
49 #include <dev/disk/iscsi/initiator/iscsi.h>
50 #include <dev/disk/iscsi/initiator/iscsivar.h>
52 // XXX: untested/incomplete
54 ic_freeze(isc_session_t *sp)
58 sdebug(2, "freezing path=%p", sp->cam_path == NULL? 0: sp->cam_path);
59 if((sp->cam_path != NULL) && !(sp->flags & ISC_FROZEN)) {
60 xpt_freeze_devq(sp->cam_path, 1);
63 sp->flags |= ISC_FROZEN;
66 // XXX: untested/incomplete
68 ic_release(isc_session_t *sp)
72 sdebug(2, "release path=%p", sp->cam_path == NULL? 0: sp->cam_path);
73 if((sp->cam_path != NULL) && (sp->flags & ISC_FROZEN)) {
74 xpt_release_devq(sp->cam_path, 1, TRUE);
77 sp->flags &= ~ISC_FROZEN;
81 ic_lost_target(isc_session_t *sp, int target)
83 struct isc_softc *isp = sp->isc;
86 sdebug(2, "target=%d", target);
87 if(sp->cam_path != NULL) {
88 lockmgr(&isp->cam_lock, LK_EXCLUSIVE);
89 xpt_async(AC_LOST_DEVICE, sp->cam_path, NULL);
90 xpt_free_path(sp->cam_path);
91 lockmgr(&isp->cam_lock, LK_RELEASE);
92 sp->cam_path = 0; // XXX
97 _scan_callback(struct cam_periph *periph, union ccb *ccb)
99 isc_session_t *sp = (isc_session_t *)ccb->ccb_h.spriv_ptr0;
105 if(sp->flags & ISC_FFPWAIT) {
106 sp->flags &= ~ISC_FFPWAIT;
112 _scan_target(isc_session_t *sp, int target)
117 sdebug(2, "target=%d", target);
119 if((ccb = kmalloc(sizeof(union ccb), M_TEMP, M_WAITOK | M_ZERO)) == NULL) {
120 xdebug("scan failed (can't allocate CCB)");
124 xpt_setup_ccb(&ccb->ccb_h, sp->cam_path, 5/*priority (low)*/);
125 ccb->ccb_h.func_code = XPT_SCAN_BUS;
126 ccb->ccb_h.cbfcnp = _scan_callback;
127 ccb->crcn.flags = CAM_FLAG_NONE;
128 ccb->ccb_h.spriv_ptr0 = sp;
135 ic_fullfeature(struct cdev *dev)
137 struct isc_softc *isp = dev->si_drv1;
138 isc_session_t *sp = (isc_session_t *)dev->si_drv2;
141 sdebug(3, "dev=%d sc=%p", minor(dev), isp);
143 sp->flags &= ~ISC_FFPHASE;
144 sp->flags |= ISC_FFPWAIT;
147 if(xpt_create_path(&sp->cam_path, xpt_periph, cam_sim_path(sp->isc->cam_sim),
148 sp->sid, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
149 xdebug("can't create cam path");
151 return ENODEV; // XXX
155 _scan_target(sp, sp->sid);
157 while(sp->flags & ISC_FFPWAIT)
158 tsleep(sp, 0, "ffp", 5*hz); // timeout should be configurable
159 if(sp->target_nluns > 0) {
160 sp->flags |= ISC_FFPHASE;
168 _inq(struct cam_sim *sim, union ccb *ccb, int maxluns)
170 struct ccb_pathinq *cpi = &ccb->cpi;
174 cpi->version_num = 1; /* XXX??? */
175 cpi->hba_inquiry = PI_SDTR_ABLE | PI_TAG_ABLE | PI_WIDE_32;
176 cpi->target_sprt = 0;
178 cpi->hba_eng_cnt = 0;
179 cpi->max_target = ISCSI_MAX_TARGETS - 1;
180 cpi->initiator_id = ISCSI_MAX_TARGETS;
181 cpi->max_lun = maxluns;
182 cpi->bus_id = cam_sim_bus(sim);
183 cpi->base_transfer_speed = 3300;
184 strncpy(cpi->sim_vid, "DragonFly", SIM_IDLEN);
185 strncpy(cpi->hba_vid, "iSCSI", HBA_IDLEN);
186 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
187 cpi->unit_number = cam_sim_unit(sim);
188 cpi->ccb_h.status = CAM_REQ_CMP;
192 _scsi_encap(struct cam_sim *sim, union ccb *ccb)
195 struct isc_softc *isp = (struct isc_softc *)cam_sim_softc(sim);
197 lockmgr(&isp->cam_lock, LK_EXCLUSIVE);
198 ret = scsi_encap(sim, ccb);
199 lockmgr(&isp->cam_lock, LK_RELEASE);
204 ic_action(struct cam_sim *sim, union ccb *ccb)
206 struct ccb_hdr *ccb_h = &ccb->ccb_h;
207 struct isc_softc *isp = (struct isc_softc *)cam_sim_softc(sim);
212 if((ccb_h->target_id != CAM_TARGET_WILDCARD) && (ccb_h->target_id < MAX_SESSIONS))
213 sp = isp->sessions[ccb_h->target_id];
217 ccb_h->spriv_ptr0 = sp;
219 debug(4, "func_code=0x%x flags=0x%x status=0x%x target=%d lun=%d retry_count=%d timeout=%d",
220 ccb_h->func_code, ccb->ccb_h.flags, ccb->ccb_h.status,
221 ccb->ccb_h.target_id, ccb->ccb_h.target_lun,
222 ccb->ccb_h.retry_count, ccb_h->timeout);
226 switch(ccb_h->func_code) {
228 // XXX: maybe check something else?
233 case XPT_GET_TRAN_SETTINGS:
234 case XPT_SET_TRAN_SETTINGS:
235 case XPT_CALC_GEOMETRY:
237 ccb->ccb_h.status = CAM_DEV_NOT_THERE;
245 if(sp == NULL && ccb->ccb_h.target_id != CAM_TARGET_WILDCARD) {
246 ccb->ccb_h.status = CAM_DEV_NOT_THERE;
248 debug(4, "status = CAM_DEV_NOT_THERE");
253 switch(ccb_h->func_code) {
256 _inq(sim, ccb, (sp? sp->opt.maxluns: ISCSI_MAX_LUNS) - 1);
259 case XPT_RESET_BUS: // (can just be a stub that does nothing and completes)
261 struct ccb_pathinq *cpi = &ccb->cpi;
263 debug(3, "XPT_RESET_BUS");
264 cpi->ccb_h.status = CAM_REQ_CMP;
270 struct ccb_scsiio* csio = &ccb->csio;
272 debug(4, "XPT_SCSI_IO cmd=0x%x", csio->cdb_io.cdb_bytes[0]);
274 ccb_h->status = CAM_REQ_INVALID; //CAM_NO_NEXUS;
275 debug(4, "xpt_done.status=%d", ccb_h->status);
278 if(ccb_h->target_lun == CAM_LUN_WILDCARD) {
279 debug(3, "target=%d: bad lun (-1)", ccb_h->target_id);
280 ccb_h->status = CAM_LUN_INVALID;
283 if(_scsi_encap(sim, ccb) != 0)
288 case XPT_CALC_GEOMETRY:
290 struct ccb_calc_geometry *ccg;
293 debug(6, "XPT_CALC_GEOMETRY vsize=%jd bsize=%d", ccg->volume_size, ccg->block_size);
294 if(ccg->block_size == 0 ||
295 (ccg->volume_size < ccg->block_size)) {
296 // print error message ...
297 /* XXX: what error is appropiate? */
300 cam_calc_geometry(ccg, /*extended*/1);
304 case XPT_GET_TRAN_SETTINGS:
306 ccb_h->status = CAM_REQ_INVALID;
314 ic_poll(struct cam_sim *sim)
321 ic_getCamVals(isc_session_t *sp, iscsi_cam_t *cp)
327 if(sp && sp->isc->cam_sim) {
328 cp->path_id = cam_sim_path(sp->isc->cam_sim);
329 cp->target_id = sp->sid;
330 cp->target_nluns = sp->target_nluns; // XXX: -1?
331 for(i = 0; i < cp->target_nluns; i++)
332 cp->target_lun[i] = sp->target_lun[i];
339 ic_destroy(struct isc_softc *isp)
343 CAM_LOCK(isp); // can't harm :-)
345 xpt_async(AC_LOST_DEVICE, isp->cam_path, NULL);
346 xpt_free_path(isp->cam_path);
347 xpt_bus_deregister(cam_sim_path(isp->cam_sim));
348 cam_sim_free(isp->cam_sim);
354 ic_init(struct isc_softc *isp)
357 struct cam_devq *devq;
358 struct cam_path *path;
360 if((devq = cam_simq_alloc(256)) == NULL)
363 lockinit(&isp->cam_lock, "isc-cam", 0, LK_CANRECURSE);
364 sim = cam_sim_alloc(ic_action, ic_poll,
365 "iscsi", isp, 0, /* unit */
367 1, /* max_dev_transactions */
368 100, /* max_tagged_dev_transactions */
371 cam_simq_release(devq);
372 lockuninit(&isp->cam_lock);
376 if(xpt_bus_register(sim,
377 0/*bus_number*/) != CAM_SUCCESS)
380 if(xpt_create_path(&path, xpt_periph, cam_sim_path(sim),
381 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
382 xpt_bus_deregister(cam_sim_path(sim));
389 isp->cam_path = path;
391 debug(2, "cam subsystem initialized"); // XXX: add dev ...
392 debug(4, "sim=%p path=%p", sim, path);