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
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include "opt_iscsi_initiator.h"
33 #include <sys/param.h>
34 #include <sys/kernel.h>
35 #include <sys/callout.h>
36 #if __FreeBSD_version >= 700000
38 #include <sys/mutex.h>
41 #include <sys/systm.h>
42 #include <sys/malloc.h>
45 #include <sys/sysctl.h>
48 #include <cam/cam_ccb.h>
49 #include <cam/cam_sim.h>
50 #include <cam/cam_xpt_sim.h>
51 #include <cam/cam_periph.h>
53 #include <dev/iscsi/initiator/iscsi.h>
54 #include <dev/iscsi/initiator/iscsivar.h>
56 // XXX: untested/incomplete
58 ic_freeze(isc_session_t *sp)
62 sdebug(2, "freezing path=%p", sp->cam_path == NULL? 0: sp->cam_path);
63 if((sp->cam_path != NULL) && !(sp->flags & ISC_FROZEN)) {
64 xpt_freeze_devq(sp->cam_path, 1);
67 sp->flags |= ISC_FROZEN;
70 // XXX: untested/incomplete
72 ic_release(isc_session_t *sp)
76 sdebug(2, "release path=%p", sp->cam_path == NULL? 0: sp->cam_path);
77 if((sp->cam_path != NULL) && (sp->flags & ISC_FROZEN)) {
78 xpt_release_devq(sp->cam_path, 1, TRUE);
81 sp->flags &= ~ISC_FROZEN;
85 ic_lost_target(isc_session_t *sp, int target)
87 struct isc_softc *isp = sp->isc;
90 sdebug(2, "target=%d", target);
91 if(sp->cam_path != NULL) {
92 mtx_lock(&isp->cam_mtx);
93 xpt_async(AC_LOST_DEVICE, sp->cam_path, NULL);
94 xpt_free_path(sp->cam_path);
95 mtx_unlock(&isp->cam_mtx);
96 sp->cam_path = 0; // XXX
101 _scan_callback(struct cam_periph *periph, union ccb *ccb)
103 isc_session_t *sp = (isc_session_t *)ccb->ccb_h.spriv_ptr0;
109 if(sp->flags & ISC_FFPWAIT) {
110 sp->flags &= ~ISC_FFPWAIT;
116 _scan_target(isc_session_t *sp, int target)
121 sdebug(2, "target=%d", target);
123 if((ccb = malloc(sizeof(union ccb), M_TEMP, M_WAITOK | M_ZERO)) == NULL) {
124 xdebug("scan failed (can't allocate CCB)");
128 xpt_setup_ccb(&ccb->ccb_h, sp->cam_path, 5/*priority (low)*/);
129 ccb->ccb_h.func_code = XPT_SCAN_BUS;
130 ccb->ccb_h.cbfcnp = _scan_callback;
131 ccb->crcn.flags = CAM_FLAG_NONE;
132 ccb->ccb_h.spriv_ptr0 = sp;
139 ic_fullfeature(struct cdev *dev)
141 struct isc_softc *isp = dev->si_drv1;
142 isc_session_t *sp = (isc_session_t *)dev->si_drv2;
145 sdebug(3, "dev=%d sc=%p", dev2unit(dev), isp);
147 sp->flags &= ~ISC_FFPHASE;
148 sp->flags |= ISC_FFPWAIT;
151 if(xpt_create_path(&sp->cam_path, xpt_periph, cam_sim_path(sp->isc->cam_sim),
152 sp->sid, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
153 xdebug("can't create cam path");
155 return ENODEV; // XXX
159 _scan_target(sp, sp->sid);
161 while(sp->flags & ISC_FFPWAIT)
162 tsleep(sp, PRIBIO, "ffp", 5*hz); // the timeout time should
164 if(sp->target_nluns > 0) {
165 sp->flags |= ISC_FFPHASE;
173 _inq(struct cam_sim *sim, union ccb *ccb, int maxluns)
175 struct ccb_pathinq *cpi = &ccb->cpi;
179 cpi->version_num = 1; /* XXX??? */
180 cpi->hba_inquiry = PI_SDTR_ABLE | PI_TAG_ABLE | PI_WIDE_32;
181 cpi->target_sprt = 0;
183 cpi->hba_eng_cnt = 0;
184 cpi->max_target = ISCSI_MAX_TARGETS - 1;
185 cpi->initiator_id = ISCSI_MAX_TARGETS;
186 cpi->max_lun = maxluns;
187 cpi->bus_id = cam_sim_bus(sim);
188 cpi->base_transfer_speed = 3300;
189 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
190 strncpy(cpi->hba_vid, "iSCSI", HBA_IDLEN);
191 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
192 cpi->unit_number = cam_sim_unit(sim);
193 cpi->transport = XPORT_ISCSI;
194 cpi->transport_version = 0;
195 cpi->ccb_h.status = CAM_REQ_CMP;
199 _scsi_encap(struct cam_sim *sim, union ccb *ccb)
203 #if __FreeBSD_version < 700000
204 ret = scsi_encap(sim, ccb);
206 struct isc_softc *isp = (struct isc_softc *)cam_sim_softc(sim);
208 mtx_unlock(&isp->cam_mtx);
209 ret = scsi_encap(sim, ccb);
210 mtx_lock(&isp->cam_mtx);
216 ic_action(struct cam_sim *sim, union ccb *ccb)
218 struct ccb_hdr *ccb_h = &ccb->ccb_h;
219 struct isc_softc *isp = (struct isc_softc *)cam_sim_softc(sim);
224 if((ccb_h->target_id != CAM_TARGET_WILDCARD) && (ccb_h->target_id < MAX_SESSIONS))
225 sp = isp->sessions[ccb_h->target_id];
229 ccb_h->spriv_ptr0 = sp;
231 debug(4, "func_code=0x%x flags=0x%x status=0x%x target=%d lun=%d retry_count=%d timeout=%d",
232 ccb_h->func_code, ccb->ccb_h.flags, ccb->ccb_h.status,
233 ccb->ccb_h.target_id, ccb->ccb_h.target_lun,
234 ccb->ccb_h.retry_count, ccb_h->timeout);
238 switch(ccb_h->func_code) {
240 // XXX: maybe check something else?
245 case XPT_GET_TRAN_SETTINGS:
246 case XPT_SET_TRAN_SETTINGS:
247 case XPT_CALC_GEOMETRY:
249 ccb->ccb_h.status = CAM_DEV_NOT_THERE;
250 #if __FreeBSD_version < 700000
261 if(sp == NULL && ccb->ccb_h.target_id != CAM_TARGET_WILDCARD) {
262 ccb->ccb_h.status = CAM_DEV_NOT_THERE;
263 #if __FreeBSD_version < 700000
268 debug(4, "status = CAM_DEV_NOT_THERE");
273 switch(ccb_h->func_code) {
276 _inq(sim, ccb, (sp? sp->opt.maxluns: ISCSI_MAX_LUNS) - 1);
279 case XPT_RESET_BUS: // (can just be a stub that does nothing and completes)
281 struct ccb_pathinq *cpi = &ccb->cpi;
283 debug(3, "XPT_RESET_BUS");
284 cpi->ccb_h.status = CAM_REQ_CMP;
290 struct ccb_scsiio* csio = &ccb->csio;
292 debug(4, "XPT_SCSI_IO cmd=0x%x", csio->cdb_io.cdb_bytes[0]);
294 ccb_h->status = CAM_REQ_INVALID; //CAM_NO_NEXUS;
295 debug(4, "xpt_done.status=%d", ccb_h->status);
298 if(ccb_h->target_lun == CAM_LUN_WILDCARD) {
299 debug(3, "target=%d: bad lun (-1)", ccb_h->target_id);
300 ccb_h->status = CAM_LUN_INVALID;
303 if(_scsi_encap(sim, ccb) != 0)
308 case XPT_CALC_GEOMETRY:
310 struct ccb_calc_geometry *ccg;
313 debug(6, "XPT_CALC_GEOMETRY vsize=%jd bsize=%d", ccg->volume_size, ccg->block_size);
314 if(ccg->block_size == 0 ||
315 (ccg->volume_size < ccg->block_size)) {
316 // print error message ...
317 /* XXX: what error is appropiate? */
320 cam_calc_geometry(ccg, /*extended*/1);
324 case XPT_GET_TRAN_SETTINGS:
326 ccb_h->status = CAM_REQ_INVALID;
329 #if __FreeBSD_version < 700000
338 ic_poll(struct cam_sim *sim)
345 ic_getCamVals(isc_session_t *sp, iscsi_cam_t *cp)
351 if(sp && sp->isc->cam_sim) {
352 cp->path_id = cam_sim_path(sp->isc->cam_sim);
353 cp->target_id = sp->sid;
354 cp->target_nluns = sp->target_nluns; // XXX: -1?
355 for(i = 0; i < cp->target_nluns; i++)
356 cp->target_lun[i] = sp->target_lun[i];
363 ic_destroy(struct isc_softc *isp)
367 CAM_LOCK(isp); // can't harm :-)
369 xpt_async(AC_LOST_DEVICE, isp->cam_path, NULL);
370 xpt_free_path(isp->cam_path);
372 xpt_bus_deregister(cam_sim_path(isp->cam_sim));
373 cam_sim_free(isp->cam_sim, TRUE /*free_devq*/);
379 ic_init(struct isc_softc *isp)
382 struct cam_devq *devq;
383 struct cam_path *path;
385 if((devq = cam_simq_alloc(256)) == NULL)
388 #if __FreeBSD_version >= 700000
389 mtx_init(&isp->cam_mtx, "isc-cam", NULL, MTX_DEF);
391 isp->cam_mtx = Giant;
393 sim = cam_sim_alloc(ic_action, ic_poll,
394 "iscsi", isp, 0/*unit*/,
395 #if __FreeBSD_version >= 700000
398 1/*max_dev_transactions*/,
399 100/*max_tagged_dev_transactions*/,
403 #if __FreeBSD_version >= 700000
404 mtx_destroy(&isp->cam_mtx);
409 if(xpt_bus_register(sim,
410 #if __FreeBSD_version >= 700000
413 0/*bus_number*/) != CAM_SUCCESS)
416 if(xpt_create_path(&path, xpt_periph, cam_sim_path(sim),
417 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
418 xpt_bus_deregister(cam_sim_path(sim));
425 isp->cam_path = path;
427 debug(2, "cam subsystem initialized"); // XXX: add dev ...
428 debug(4, "sim=%p path=%p", sim, path);
432 cam_sim_free(sim, /*free_devq*/TRUE);
434 #if __FreeBSD_version >= 700000
435 mtx_destroy(&isp->cam_mtx);