1/*-
2 * Generic SCSI Target Kernel Mode Driver
3 *
4 * Copyright (c) 2002 Nate Lawson.
5 * Copyright (c) 1998, 1999, 2001, 2002 Justin T. Gibbs.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions, and the following disclaimer,
13 * without modification, immediately at the beginning of the file.
14 * 2. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
| 1/*-
2 * Generic SCSI Target Kernel Mode Driver
3 *
4 * Copyright (c) 2002 Nate Lawson.
5 * Copyright (c) 1998, 1999, 2001, 2002 Justin T. Gibbs.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions, and the following disclaimer,
13 * without modification, immediately at the beginning of the file.
14 * 2. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
|
31__FBSDID("$FreeBSD: head/sys/cam/scsi/scsi_target.c 167082 2007-02-27 17:15:39Z jhb $");
| 31__FBSDID("$FreeBSD: head/sys/cam/scsi/scsi_target.c 168752 2007-04-15 08:49:19Z scottl $");
|
32
33
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/kernel.h>
37#include <sys/conf.h>
38#include <sys/malloc.h>
39#include <sys/poll.h>
40#include <sys/vnode.h>
41#include <sys/lock.h>
42#include <sys/mutex.h>
43#include <sys/devicestat.h>
44#include <sys/proc.h>
45
46#include <cam/cam.h>
47#include <cam/cam_ccb.h>
48#include <cam/cam_periph.h>
49#include <cam/cam_xpt_periph.h>
| 32
33
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/kernel.h>
37#include <sys/conf.h>
38#include <sys/malloc.h>
39#include <sys/poll.h>
40#include <sys/vnode.h>
41#include <sys/lock.h>
42#include <sys/mutex.h>
43#include <sys/devicestat.h>
44#include <sys/proc.h>
45
46#include <cam/cam.h>
47#include <cam/cam_ccb.h>
48#include <cam/cam_periph.h>
49#include <cam/cam_xpt_periph.h>
|
| 50#include <cam/cam_sim.h>
|
50#include <cam/scsi/scsi_targetio.h>
51
52/* Transaction information attached to each CCB sent by the user */
53struct targ_cmd_descr {
54 struct cam_periph_map_info mapinfo;
55 TAILQ_ENTRY(targ_cmd_descr) tqe;
56 union ccb *user_ccb;
57 int priority;
58 int func_code;
59};
60
61/* Offset into the private CCB area for storing our descriptor */
62#define targ_descr periph_priv.entries[1].ptr
63
64TAILQ_HEAD(descr_queue, targ_cmd_descr);
65
66typedef enum {
67 TARG_STATE_RESV = 0x00, /* Invalid state */
68 TARG_STATE_OPENED = 0x01, /* Device opened, softc initialized */
69 TARG_STATE_LUN_ENABLED = 0x02 /* Device enabled for a path */
70} targ_state;
71
72/* Per-instance device software context */
73struct targ_softc {
74 /* CCBs (CTIOs, ATIOs, INOTs) pending on the controller */
75 struct ccb_queue pending_ccb_queue;
76
77 /* Command descriptors awaiting CTIO resources from the XPT */
78 struct descr_queue work_queue;
79
80 /* Command descriptors that have been aborted back to the user. */
81 struct descr_queue abort_queue;
82
83 /*
84 * Queue of CCBs that have been copied out to userland, but our
85 * userland daemon has not yet seen.
86 */
87 struct ccb_queue user_ccb_queue;
88
89 struct cam_periph *periph;
90 struct cam_path *path;
91 targ_state state;
92 struct selinfo read_select;
93 struct devstat device_stats;
94};
95
96static d_open_t targopen;
97static d_close_t targclose;
98static d_read_t targread;
99static d_write_t targwrite;
100static d_ioctl_t targioctl;
101static d_poll_t targpoll;
102static d_kqfilter_t targkqfilter;
103static void targreadfiltdetach(struct knote *kn);
104static int targreadfilt(struct knote *kn, long hint);
105static struct filterops targread_filtops =
106 { 1, NULL, targreadfiltdetach, targreadfilt };
107
108static struct cdevsw targ_cdevsw = {
109 .d_version = D_VERSION,
110 .d_flags = D_NEEDGIANT,
111 .d_open = targopen,
112 .d_close = targclose,
113 .d_read = targread,
114 .d_write = targwrite,
115 .d_ioctl = targioctl,
116 .d_poll = targpoll,
117 .d_name = "targ",
118 .d_kqfilter = targkqfilter
119};
120
121static cam_status targendislun(struct cam_path *path, int enable,
122 int grp6_len, int grp7_len);
123static cam_status targenable(struct targ_softc *softc,
124 struct cam_path *path,
125 int grp6_len, int grp7_len);
126static cam_status targdisable(struct targ_softc *softc);
127static periph_ctor_t targctor;
128static periph_dtor_t targdtor;
129static periph_start_t targstart;
130static int targusermerge(struct targ_softc *softc,
131 struct targ_cmd_descr *descr,
132 union ccb *ccb);
133static int targsendccb(struct targ_softc *softc, union ccb *ccb,
134 struct targ_cmd_descr *descr);
135static void targdone(struct cam_periph *periph,
136 union ccb *done_ccb);
137static int targreturnccb(struct targ_softc *softc,
138 union ccb *ccb);
139static union ccb * targgetccb(struct targ_softc *softc, xpt_opcode type,
140 int priority);
141static void targfreeccb(struct targ_softc *softc, union ccb *ccb);
142static struct targ_cmd_descr *
143 targgetdescr(struct targ_softc *softc);
144static periph_init_t targinit;
145static void targclone(void *arg, struct ucred *cred, char *name,
146 int namelen, struct cdev **dev);
147static void targasync(void *callback_arg, u_int32_t code,
148 struct cam_path *path, void *arg);
149static void abort_all_pending(struct targ_softc *softc);
150static void notify_user(struct targ_softc *softc);
151static int targcamstatus(cam_status status);
152static size_t targccblen(xpt_opcode func_code);
153
154static struct periph_driver targdriver =
155{
156 targinit, "targ",
157 TAILQ_HEAD_INITIALIZER(targdriver.units), /* generation */ 0
158};
159PERIPHDRIVER_DECLARE(targ, targdriver);
160
161static MALLOC_DEFINE(M_TARG, "TARG", "TARG data");
162
| 51#include <cam/scsi/scsi_targetio.h>
52
53/* Transaction information attached to each CCB sent by the user */
54struct targ_cmd_descr {
55 struct cam_periph_map_info mapinfo;
56 TAILQ_ENTRY(targ_cmd_descr) tqe;
57 union ccb *user_ccb;
58 int priority;
59 int func_code;
60};
61
62/* Offset into the private CCB area for storing our descriptor */
63#define targ_descr periph_priv.entries[1].ptr
64
65TAILQ_HEAD(descr_queue, targ_cmd_descr);
66
67typedef enum {
68 TARG_STATE_RESV = 0x00, /* Invalid state */
69 TARG_STATE_OPENED = 0x01, /* Device opened, softc initialized */
70 TARG_STATE_LUN_ENABLED = 0x02 /* Device enabled for a path */
71} targ_state;
72
73/* Per-instance device software context */
74struct targ_softc {
75 /* CCBs (CTIOs, ATIOs, INOTs) pending on the controller */
76 struct ccb_queue pending_ccb_queue;
77
78 /* Command descriptors awaiting CTIO resources from the XPT */
79 struct descr_queue work_queue;
80
81 /* Command descriptors that have been aborted back to the user. */
82 struct descr_queue abort_queue;
83
84 /*
85 * Queue of CCBs that have been copied out to userland, but our
86 * userland daemon has not yet seen.
87 */
88 struct ccb_queue user_ccb_queue;
89
90 struct cam_periph *periph;
91 struct cam_path *path;
92 targ_state state;
93 struct selinfo read_select;
94 struct devstat device_stats;
95};
96
97static d_open_t targopen;
98static d_close_t targclose;
99static d_read_t targread;
100static d_write_t targwrite;
101static d_ioctl_t targioctl;
102static d_poll_t targpoll;
103static d_kqfilter_t targkqfilter;
104static void targreadfiltdetach(struct knote *kn);
105static int targreadfilt(struct knote *kn, long hint);
106static struct filterops targread_filtops =
107 { 1, NULL, targreadfiltdetach, targreadfilt };
108
109static struct cdevsw targ_cdevsw = {
110 .d_version = D_VERSION,
111 .d_flags = D_NEEDGIANT,
112 .d_open = targopen,
113 .d_close = targclose,
114 .d_read = targread,
115 .d_write = targwrite,
116 .d_ioctl = targioctl,
117 .d_poll = targpoll,
118 .d_name = "targ",
119 .d_kqfilter = targkqfilter
120};
121
122static cam_status targendislun(struct cam_path *path, int enable,
123 int grp6_len, int grp7_len);
124static cam_status targenable(struct targ_softc *softc,
125 struct cam_path *path,
126 int grp6_len, int grp7_len);
127static cam_status targdisable(struct targ_softc *softc);
128static periph_ctor_t targctor;
129static periph_dtor_t targdtor;
130static periph_start_t targstart;
131static int targusermerge(struct targ_softc *softc,
132 struct targ_cmd_descr *descr,
133 union ccb *ccb);
134static int targsendccb(struct targ_softc *softc, union ccb *ccb,
135 struct targ_cmd_descr *descr);
136static void targdone(struct cam_periph *periph,
137 union ccb *done_ccb);
138static int targreturnccb(struct targ_softc *softc,
139 union ccb *ccb);
140static union ccb * targgetccb(struct targ_softc *softc, xpt_opcode type,
141 int priority);
142static void targfreeccb(struct targ_softc *softc, union ccb *ccb);
143static struct targ_cmd_descr *
144 targgetdescr(struct targ_softc *softc);
145static periph_init_t targinit;
146static void targclone(void *arg, struct ucred *cred, char *name,
147 int namelen, struct cdev **dev);
148static void targasync(void *callback_arg, u_int32_t code,
149 struct cam_path *path, void *arg);
150static void abort_all_pending(struct targ_softc *softc);
151static void notify_user(struct targ_softc *softc);
152static int targcamstatus(cam_status status);
153static size_t targccblen(xpt_opcode func_code);
154
155static struct periph_driver targdriver =
156{
157 targinit, "targ",
158 TAILQ_HEAD_INITIALIZER(targdriver.units), /* generation */ 0
159};
160PERIPHDRIVER_DECLARE(targ, targdriver);
161
162static MALLOC_DEFINE(M_TARG, "TARG", "TARG data");
163
|
163/* Create softc and initialize it. Only one proc can open each targ device. */
| 164/*
165 * Create softc and initialize it. Only one proc can open each targ device.
166 * There is no locking here because a periph doesn't get created until an
167 * ioctl is issued to do so, and that can't happen until this method returns.
168 */
|
164static int
165targopen(struct cdev *dev, int flags, int fmt, struct thread *td)
166{
167 struct targ_softc *softc;
168
169 if (dev->si_drv1 != 0) {
170 return (EBUSY);
171 }
172
173 /* Mark device busy before any potentially blocking operations */
174 dev->si_drv1 = (void *)~0;
175
176 /* Create the targ device, allocate its softc, initialize it */
177 if ((dev->si_flags & SI_NAMED) == 0) {
178 make_dev(&targ_cdevsw, minor(dev), UID_ROOT, GID_WHEEL, 0600,
179 "targ%d", dev2unit(dev));
180 }
181 MALLOC(softc, struct targ_softc *, sizeof(*softc), M_TARG,
182 M_WAITOK | M_ZERO);
183 dev->si_drv1 = softc;
184 softc->state = TARG_STATE_OPENED;
185 softc->periph = NULL;
186 softc->path = NULL;
187
188 TAILQ_INIT(&softc->pending_ccb_queue);
189 TAILQ_INIT(&softc->work_queue);
190 TAILQ_INIT(&softc->abort_queue);
191 TAILQ_INIT(&softc->user_ccb_queue);
192 knlist_init(&softc->read_select.si_note, NULL, NULL, NULL, NULL);
193
194 return (0);
195}
196
197/* Disable LUN if enabled and teardown softc */
198static int
199targclose(struct cdev *dev, int flag, int fmt, struct thread *td)
200{
201 struct targ_softc *softc;
| 169static int
170targopen(struct cdev *dev, int flags, int fmt, struct thread *td)
171{
172 struct targ_softc *softc;
173
174 if (dev->si_drv1 != 0) {
175 return (EBUSY);
176 }
177
178 /* Mark device busy before any potentially blocking operations */
179 dev->si_drv1 = (void *)~0;
180
181 /* Create the targ device, allocate its softc, initialize it */
182 if ((dev->si_flags & SI_NAMED) == 0) {
183 make_dev(&targ_cdevsw, minor(dev), UID_ROOT, GID_WHEEL, 0600,
184 "targ%d", dev2unit(dev));
185 }
186 MALLOC(softc, struct targ_softc *, sizeof(*softc), M_TARG,
187 M_WAITOK | M_ZERO);
188 dev->si_drv1 = softc;
189 softc->state = TARG_STATE_OPENED;
190 softc->periph = NULL;
191 softc->path = NULL;
192
193 TAILQ_INIT(&softc->pending_ccb_queue);
194 TAILQ_INIT(&softc->work_queue);
195 TAILQ_INIT(&softc->abort_queue);
196 TAILQ_INIT(&softc->user_ccb_queue);
197 knlist_init(&softc->read_select.si_note, NULL, NULL, NULL, NULL);
198
199 return (0);
200}
201
202/* Disable LUN if enabled and teardown softc */
203static int
204targclose(struct cdev *dev, int flag, int fmt, struct thread *td)
205{
206 struct targ_softc *softc;
|
| 207 struct cam_periph *periph;
|
202 int error;
203
204 softc = (struct targ_softc *)dev->si_drv1;
| 208 int error;
209
210 softc = (struct targ_softc *)dev->si_drv1;
|
| 211 if ((softc->periph == NULL) ||
212 (softc->state & TARG_STATE_LUN_ENABLED) == 0) {
213 destroy_dev(dev);
214 FREE(softc, M_TARG);
215 return (0);
216 }
217
218 /*
219 * Acquire a hold on the periph so that it doesn't go away before
220 * we are ready at the end of the function.
221 */
222 periph = softc->periph;
223 cam_periph_acquire(periph);
224 cam_periph_lock(periph);
|
205 error = targdisable(softc);
206 if (error == CAM_REQ_CMP) {
207 dev->si_drv1 = 0;
208 if (softc->periph != NULL) {
209 cam_periph_invalidate(softc->periph);
210 softc->periph = NULL;
211 }
212 destroy_dev(dev);
213 FREE(softc, M_TARG);
214 }
| 225 error = targdisable(softc);
226 if (error == CAM_REQ_CMP) {
227 dev->si_drv1 = 0;
228 if (softc->periph != NULL) {
229 cam_periph_invalidate(softc->periph);
230 softc->periph = NULL;
231 }
232 destroy_dev(dev);
233 FREE(softc, M_TARG);
234 }
|
| 235 cam_periph_unlock(periph);
236 cam_periph_release(periph);
237
|
215 return (error);
216}
217
218/* Enable/disable LUNs, set debugging level */
219static int
220targioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
221{
222 struct targ_softc *softc;
223 cam_status status;
224
225 softc = (struct targ_softc *)dev->si_drv1;
226
227 switch (cmd) {
228 case TARGIOCENABLE:
229 {
230 struct ioc_enable_lun *new_lun;
231 struct cam_path *path;
| 238 return (error);
239}
240
241/* Enable/disable LUNs, set debugging level */
242static int
243targioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
244{
245 struct targ_softc *softc;
246 cam_status status;
247
248 softc = (struct targ_softc *)dev->si_drv1;
249
250 switch (cmd) {
251 case TARGIOCENABLE:
252 {
253 struct ioc_enable_lun *new_lun;
254 struct cam_path *path;
|
| 255 struct cam_sim *sim;
|
232
233 new_lun = (struct ioc_enable_lun *)addr;
| 256
257 new_lun = (struct ioc_enable_lun *)addr;
|
234 status = xpt_create_path(&path, /*periph*/NULL,
235 new_lun->path_id,
236 new_lun->target_id,
237 new_lun->lun_id);
| 258 status = xpt_create_path_unlocked(&path, /*periph*/NULL,
259 new_lun->path_id,
260 new_lun->target_id,
261 new_lun->lun_id);
|
238 if (status != CAM_REQ_CMP) {
239 printf("Couldn't create path, status %#x\n", status);
240 break;
241 }
| 262 if (status != CAM_REQ_CMP) {
263 printf("Couldn't create path, status %#x\n", status);
264 break;
265 }
|
| 266 sim = xpt_path_sim(path);
267 mtx_lock(sim->mtx);
|
242 status = targenable(softc, path, new_lun->grp6_len,
243 new_lun->grp7_len);
244 xpt_free_path(path);
| 268 status = targenable(softc, path, new_lun->grp6_len,
269 new_lun->grp7_len);
270 xpt_free_path(path);
|
| 271 mtx_unlock(sim->mtx);
|
245 break;
246 }
247 case TARGIOCDISABLE:
| 272 break;
273 }
274 case TARGIOCDISABLE:
|
| 275 if (softc->periph == NULL) {
276 status = CAM_DEV_NOT_THERE;
277 break;
278 }
279 cam_periph_lock(softc->periph);
|
248 status = targdisable(softc);
| 280 status = targdisable(softc);
|
| 281 cam_periph_unlock(softc->periph);
|
249 break;
250 case TARGIOCDEBUG:
251 {
252#ifdef CAMDEBUG
253 struct ccb_debug cdbg;
254
| 282 break;
283 case TARGIOCDEBUG:
284 {
285#ifdef CAMDEBUG
286 struct ccb_debug cdbg;
287
|
| 288 /* If no periph available, disallow debugging changes */
289 if ((softc->state & TARG_STATE_LUN_ENABLED) == 0) {
290 status = CAM_DEV_NOT_THERE;
291 break;
292 }
|
255 bzero(&cdbg, sizeof cdbg);
256 if (*((int *)addr) != 0)
257 cdbg.flags = CAM_DEBUG_PERIPH;
258 else
259 cdbg.flags = CAM_DEBUG_NONE;
| 293 bzero(&cdbg, sizeof cdbg);
294 if (*((int *)addr) != 0)
295 cdbg.flags = CAM_DEBUG_PERIPH;
296 else
297 cdbg.flags = CAM_DEBUG_NONE;
|
| 298 cam_periph_lock(softc->periph);
|
260 xpt_setup_ccb(&cdbg.ccb_h, softc->path, /*priority*/0);
261 cdbg.ccb_h.func_code = XPT_DEBUG;
262 cdbg.ccb_h.cbfcnp = targdone;
263
| 299 xpt_setup_ccb(&cdbg.ccb_h, softc->path, /*priority*/0);
300 cdbg.ccb_h.func_code = XPT_DEBUG;
301 cdbg.ccb_h.cbfcnp = targdone;
302
|
264 /* If no periph available, disallow debugging changes */
265 if ((softc->state & TARG_STATE_LUN_ENABLED) == 0) {
266 status = CAM_DEV_NOT_THERE;
267 break;
268 }
| |
269 xpt_action((union ccb *)&cdbg);
| 303 xpt_action((union ccb *)&cdbg);
|
| 304 cam_periph_unlock(softc->periph);
|
270 status = cdbg.ccb_h.status & CAM_STATUS_MASK;
271#else
272 status = CAM_FUNC_NOTAVAIL;
273#endif
274 break;
275 }
276 default:
277 status = CAM_PROVIDE_FAIL;
278 break;
279 }
280
281 return (targcamstatus(status));
282}
283
284/* Writes are always ready, reads wait for user_ccb_queue or abort_queue */
285static int
286targpoll(struct cdev *dev, int poll_events, struct thread *td)
287{
288 struct targ_softc *softc;
289 int revents;
290
291 softc = (struct targ_softc *)dev->si_drv1;
292
293 /* Poll for write() is always ok. */
294 revents = poll_events & (POLLOUT | POLLWRNORM);
295 if ((poll_events & (POLLIN | POLLRDNORM)) != 0) {
296 /* Poll for read() depends on user and abort queues. */
| 305 status = cdbg.ccb_h.status & CAM_STATUS_MASK;
306#else
307 status = CAM_FUNC_NOTAVAIL;
308#endif
309 break;
310 }
311 default:
312 status = CAM_PROVIDE_FAIL;
313 break;
314 }
315
316 return (targcamstatus(status));
317}
318
319/* Writes are always ready, reads wait for user_ccb_queue or abort_queue */
320static int
321targpoll(struct cdev *dev, int poll_events, struct thread *td)
322{
323 struct targ_softc *softc;
324 int revents;
325
326 softc = (struct targ_softc *)dev->si_drv1;
327
328 /* Poll for write() is always ok. */
329 revents = poll_events & (POLLOUT | POLLWRNORM);
330 if ((poll_events & (POLLIN | POLLRDNORM)) != 0) {
331 /* Poll for read() depends on user and abort queues. */
|
| 332 cam_periph_lock(softc->periph);
|
297 if (!TAILQ_EMPTY(&softc->user_ccb_queue) ||
298 !TAILQ_EMPTY(&softc->abort_queue)) {
299 revents |= poll_events & (POLLIN | POLLRDNORM);
300 }
| 333 if (!TAILQ_EMPTY(&softc->user_ccb_queue) ||
334 !TAILQ_EMPTY(&softc->abort_queue)) {
335 revents |= poll_events & (POLLIN | POLLRDNORM);
336 }
|
| 337 cam_periph_unlock(softc->periph);
|
301 /* Only sleep if the user didn't poll for write. */
302 if (revents == 0)
303 selrecord(td, &softc->read_select);
304 }
305
306 return (revents);
307}
308
309static int
310targkqfilter(struct cdev *dev, struct knote *kn)
311{
312 struct targ_softc *softc;
313
314 softc = (struct targ_softc *)dev->si_drv1;
315 kn->kn_hook = (caddr_t)softc;
316 kn->kn_fop = &targread_filtops;
317 knlist_add(&softc->read_select.si_note, kn, 0);
318 return (0);
319}
320
321static void
322targreadfiltdetach(struct knote *kn)
323{
324 struct targ_softc *softc;
325
326 softc = (struct targ_softc *)kn->kn_hook;
327 knlist_remove(&softc->read_select.si_note, kn, 0);
328}
329
330/* Notify the user's kqueue when the user queue or abort queue gets a CCB */
331static int
332targreadfilt(struct knote *kn, long hint)
333{
334 struct targ_softc *softc;
335 int retval;
336
337 softc = (struct targ_softc *)kn->kn_hook;
| 338 /* Only sleep if the user didn't poll for write. */
339 if (revents == 0)
340 selrecord(td, &softc->read_select);
341 }
342
343 return (revents);
344}
345
346static int
347targkqfilter(struct cdev *dev, struct knote *kn)
348{
349 struct targ_softc *softc;
350
351 softc = (struct targ_softc *)dev->si_drv1;
352 kn->kn_hook = (caddr_t)softc;
353 kn->kn_fop = &targread_filtops;
354 knlist_add(&softc->read_select.si_note, kn, 0);
355 return (0);
356}
357
358static void
359targreadfiltdetach(struct knote *kn)
360{
361 struct targ_softc *softc;
362
363 softc = (struct targ_softc *)kn->kn_hook;
364 knlist_remove(&softc->read_select.si_note, kn, 0);
365}
366
367/* Notify the user's kqueue when the user queue or abort queue gets a CCB */
368static int
369targreadfilt(struct knote *kn, long hint)
370{
371 struct targ_softc *softc;
372 int retval;
373
374 softc = (struct targ_softc *)kn->kn_hook;
|
| 375 cam_periph_lock(softc->periph);
|
338 retval = !TAILQ_EMPTY(&softc->user_ccb_queue) ||
339 !TAILQ_EMPTY(&softc->abort_queue);
| 376 retval = !TAILQ_EMPTY(&softc->user_ccb_queue) ||
377 !TAILQ_EMPTY(&softc->abort_queue);
|
| 378 cam_periph_unlock(softc->periph);
|
340 return (retval);
341}
342
343/* Send the HBA the enable/disable message */
344static cam_status
345targendislun(struct cam_path *path, int enable, int grp6_len, int grp7_len)
346{
347 struct ccb_en_lun en_ccb;
348 cam_status status;
349
350 /* Tell the lun to begin answering selects */
351 xpt_setup_ccb(&en_ccb.ccb_h, path, /*priority*/1);
352 en_ccb.ccb_h.func_code = XPT_EN_LUN;
353 /* Don't need support for any vendor specific commands */
354 en_ccb.grp6_len = grp6_len;
355 en_ccb.grp7_len = grp7_len;
356 en_ccb.enable = enable ? 1 : 0;
357 xpt_action((union ccb *)&en_ccb);
358 status = en_ccb.ccb_h.status & CAM_STATUS_MASK;
359 if (status != CAM_REQ_CMP) {
360 xpt_print(path, "%sable lun CCB rejected, status %#x\n",
361 enable ? "en" : "dis", status);
362 }
363 return (status);
364}
365
366/* Enable target mode on a LUN, given its path */
367static cam_status
368targenable(struct targ_softc *softc, struct cam_path *path, int grp6_len,
369 int grp7_len)
370{
371 struct cam_periph *periph;
372 struct ccb_pathinq cpi;
373 cam_status status;
374
375 if ((softc->state & TARG_STATE_LUN_ENABLED) != 0)
376 return (CAM_LUN_ALRDY_ENA);
377
378 /* Make sure SIM supports target mode */
379 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
380 cpi.ccb_h.func_code = XPT_PATH_INQ;
381 xpt_action((union ccb *)&cpi);
382 status = cpi.ccb_h.status & CAM_STATUS_MASK;
383 if (status != CAM_REQ_CMP) {
384 printf("pathinq failed, status %#x\n", status);
385 goto enable_fail;
386 }
387 if ((cpi.target_sprt & PIT_PROCESSOR) == 0) {
388 printf("controller does not support target mode\n");
389 status = CAM_FUNC_NOTAVAIL;
390 goto enable_fail;
391 }
392
393 /* Destroy any periph on our path if it is disabled */
394 periph = cam_periph_find(path, "targ");
395 if (periph != NULL) {
396 struct targ_softc *del_softc;
397
398 del_softc = (struct targ_softc *)periph->softc;
399 if ((del_softc->state & TARG_STATE_LUN_ENABLED) == 0) {
400 cam_periph_invalidate(del_softc->periph);
401 del_softc->periph = NULL;
402 } else {
403 printf("Requested path still in use by targ%d\n",
404 periph->unit_number);
405 status = CAM_LUN_ALRDY_ENA;
406 goto enable_fail;
407 }
408 }
409
410 /* Create a periph instance attached to this path */
411 status = cam_periph_alloc(targctor, NULL, targdtor, targstart,
412 "targ", CAM_PERIPH_BIO, path, targasync, 0, softc);
413 if (status != CAM_REQ_CMP) {
414 printf("cam_periph_alloc failed, status %#x\n", status);
415 goto enable_fail;
416 }
417
418 /* Ensure that the periph now exists. */
419 if (cam_periph_find(path, "targ") == NULL) {
420 panic("targenable: succeeded but no periph?");
421 /* NOTREACHED */
422 }
423
424 /* Send the enable lun message */
425 status = targendislun(path, /*enable*/1, grp6_len, grp7_len);
426 if (status != CAM_REQ_CMP) {
427 printf("enable lun failed, status %#x\n", status);
428 goto enable_fail;
429 }
430 softc->state |= TARG_STATE_LUN_ENABLED;
431
432enable_fail:
433 return (status);
434}
435
436/* Disable this softc's target instance if enabled */
437static cam_status
438targdisable(struct targ_softc *softc)
439{
440 cam_status status;
441
442 if ((softc->state & TARG_STATE_LUN_ENABLED) == 0)
443 return (CAM_REQ_CMP);
444
445 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH, ("targdisable\n"));
446
447 /* Abort any ccbs pending on the controller */
448 abort_all_pending(softc);
449
450 /* Disable this lun */
451 status = targendislun(softc->path, /*enable*/0,
452 /*grp6_len*/0, /*grp7_len*/0);
453 if (status == CAM_REQ_CMP)
454 softc->state &= ~TARG_STATE_LUN_ENABLED;
455 else
456 printf("Disable lun failed, status %#x\n", status);
457
458 return (status);
459}
460
461/* Initialize a periph (called from cam_periph_alloc) */
462static cam_status
463targctor(struct cam_periph *periph, void *arg)
464{
465 struct targ_softc *softc;
466
467 /* Store pointer to softc for periph-driven routines */
468 softc = (struct targ_softc *)arg;
469 periph->softc = softc;
470 softc->periph = periph;
471 softc->path = periph->path;
472 return (CAM_REQ_CMP);
473}
474
475static void
476targdtor(struct cam_periph *periph)
477{
478 struct targ_softc *softc;
479 struct ccb_hdr *ccb_h;
480 struct targ_cmd_descr *descr;
481
482 softc = (struct targ_softc *)periph->softc;
483
484 /*
485 * targdisable() aborts CCBs back to the user and leaves them
486 * on user_ccb_queue and abort_queue in case the user is still
487 * interested in them. We free them now.
488 */
489 while ((ccb_h = TAILQ_FIRST(&softc->user_ccb_queue)) != NULL) {
490 TAILQ_REMOVE(&softc->user_ccb_queue, ccb_h, periph_links.tqe);
491 targfreeccb(softc, (union ccb *)ccb_h);
492 }
493 while ((descr = TAILQ_FIRST(&softc->abort_queue)) != NULL) {
494 TAILQ_REMOVE(&softc->abort_queue, descr, tqe);
495 FREE(descr, M_TARG);
496 }
497
498 softc->periph = NULL;
499 softc->path = NULL;
500 periph->softc = NULL;
501}
502
503/* Receive CCBs from user mode proc and send them to the HBA */
504static int
505targwrite(struct cdev *dev, struct uio *uio, int ioflag)
506{
507 union ccb *user_ccb;
508 struct targ_softc *softc;
509 struct targ_cmd_descr *descr;
510 int write_len, error;
511 int func_code, priority;
512
513 softc = (struct targ_softc *)dev->si_drv1;
514 write_len = error = 0;
515 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH,
516 ("write - uio_resid %d\n", uio->uio_resid));
517 while (uio->uio_resid >= sizeof(user_ccb) && error == 0) {
518 union ccb *ccb;
519
520 error = uiomove((caddr_t)&user_ccb, sizeof(user_ccb), uio);
521 if (error != 0) {
522 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH,
523 ("write - uiomove failed (%d)\n", error));
524 break;
525 }
526 priority = fuword32(&user_ccb->ccb_h.pinfo.priority);
527 if (priority == -1) {
528 error = EINVAL;
529 break;
530 }
531 func_code = fuword32(&user_ccb->ccb_h.func_code);
532 switch (func_code) {
533 case XPT_ACCEPT_TARGET_IO:
534 case XPT_IMMED_NOTIFY:
| 379 return (retval);
380}
381
382/* Send the HBA the enable/disable message */
383static cam_status
384targendislun(struct cam_path *path, int enable, int grp6_len, int grp7_len)
385{
386 struct ccb_en_lun en_ccb;
387 cam_status status;
388
389 /* Tell the lun to begin answering selects */
390 xpt_setup_ccb(&en_ccb.ccb_h, path, /*priority*/1);
391 en_ccb.ccb_h.func_code = XPT_EN_LUN;
392 /* Don't need support for any vendor specific commands */
393 en_ccb.grp6_len = grp6_len;
394 en_ccb.grp7_len = grp7_len;
395 en_ccb.enable = enable ? 1 : 0;
396 xpt_action((union ccb *)&en_ccb);
397 status = en_ccb.ccb_h.status & CAM_STATUS_MASK;
398 if (status != CAM_REQ_CMP) {
399 xpt_print(path, "%sable lun CCB rejected, status %#x\n",
400 enable ? "en" : "dis", status);
401 }
402 return (status);
403}
404
405/* Enable target mode on a LUN, given its path */
406static cam_status
407targenable(struct targ_softc *softc, struct cam_path *path, int grp6_len,
408 int grp7_len)
409{
410 struct cam_periph *periph;
411 struct ccb_pathinq cpi;
412 cam_status status;
413
414 if ((softc->state & TARG_STATE_LUN_ENABLED) != 0)
415 return (CAM_LUN_ALRDY_ENA);
416
417 /* Make sure SIM supports target mode */
418 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
419 cpi.ccb_h.func_code = XPT_PATH_INQ;
420 xpt_action((union ccb *)&cpi);
421 status = cpi.ccb_h.status & CAM_STATUS_MASK;
422 if (status != CAM_REQ_CMP) {
423 printf("pathinq failed, status %#x\n", status);
424 goto enable_fail;
425 }
426 if ((cpi.target_sprt & PIT_PROCESSOR) == 0) {
427 printf("controller does not support target mode\n");
428 status = CAM_FUNC_NOTAVAIL;
429 goto enable_fail;
430 }
431
432 /* Destroy any periph on our path if it is disabled */
433 periph = cam_periph_find(path, "targ");
434 if (periph != NULL) {
435 struct targ_softc *del_softc;
436
437 del_softc = (struct targ_softc *)periph->softc;
438 if ((del_softc->state & TARG_STATE_LUN_ENABLED) == 0) {
439 cam_periph_invalidate(del_softc->periph);
440 del_softc->periph = NULL;
441 } else {
442 printf("Requested path still in use by targ%d\n",
443 periph->unit_number);
444 status = CAM_LUN_ALRDY_ENA;
445 goto enable_fail;
446 }
447 }
448
449 /* Create a periph instance attached to this path */
450 status = cam_periph_alloc(targctor, NULL, targdtor, targstart,
451 "targ", CAM_PERIPH_BIO, path, targasync, 0, softc);
452 if (status != CAM_REQ_CMP) {
453 printf("cam_periph_alloc failed, status %#x\n", status);
454 goto enable_fail;
455 }
456
457 /* Ensure that the periph now exists. */
458 if (cam_periph_find(path, "targ") == NULL) {
459 panic("targenable: succeeded but no periph?");
460 /* NOTREACHED */
461 }
462
463 /* Send the enable lun message */
464 status = targendislun(path, /*enable*/1, grp6_len, grp7_len);
465 if (status != CAM_REQ_CMP) {
466 printf("enable lun failed, status %#x\n", status);
467 goto enable_fail;
468 }
469 softc->state |= TARG_STATE_LUN_ENABLED;
470
471enable_fail:
472 return (status);
473}
474
475/* Disable this softc's target instance if enabled */
476static cam_status
477targdisable(struct targ_softc *softc)
478{
479 cam_status status;
480
481 if ((softc->state & TARG_STATE_LUN_ENABLED) == 0)
482 return (CAM_REQ_CMP);
483
484 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH, ("targdisable\n"));
485
486 /* Abort any ccbs pending on the controller */
487 abort_all_pending(softc);
488
489 /* Disable this lun */
490 status = targendislun(softc->path, /*enable*/0,
491 /*grp6_len*/0, /*grp7_len*/0);
492 if (status == CAM_REQ_CMP)
493 softc->state &= ~TARG_STATE_LUN_ENABLED;
494 else
495 printf("Disable lun failed, status %#x\n", status);
496
497 return (status);
498}
499
500/* Initialize a periph (called from cam_periph_alloc) */
501static cam_status
502targctor(struct cam_periph *periph, void *arg)
503{
504 struct targ_softc *softc;
505
506 /* Store pointer to softc for periph-driven routines */
507 softc = (struct targ_softc *)arg;
508 periph->softc = softc;
509 softc->periph = periph;
510 softc->path = periph->path;
511 return (CAM_REQ_CMP);
512}
513
514static void
515targdtor(struct cam_periph *periph)
516{
517 struct targ_softc *softc;
518 struct ccb_hdr *ccb_h;
519 struct targ_cmd_descr *descr;
520
521 softc = (struct targ_softc *)periph->softc;
522
523 /*
524 * targdisable() aborts CCBs back to the user and leaves them
525 * on user_ccb_queue and abort_queue in case the user is still
526 * interested in them. We free them now.
527 */
528 while ((ccb_h = TAILQ_FIRST(&softc->user_ccb_queue)) != NULL) {
529 TAILQ_REMOVE(&softc->user_ccb_queue, ccb_h, periph_links.tqe);
530 targfreeccb(softc, (union ccb *)ccb_h);
531 }
532 while ((descr = TAILQ_FIRST(&softc->abort_queue)) != NULL) {
533 TAILQ_REMOVE(&softc->abort_queue, descr, tqe);
534 FREE(descr, M_TARG);
535 }
536
537 softc->periph = NULL;
538 softc->path = NULL;
539 periph->softc = NULL;
540}
541
542/* Receive CCBs from user mode proc and send them to the HBA */
543static int
544targwrite(struct cdev *dev, struct uio *uio, int ioflag)
545{
546 union ccb *user_ccb;
547 struct targ_softc *softc;
548 struct targ_cmd_descr *descr;
549 int write_len, error;
550 int func_code, priority;
551
552 softc = (struct targ_softc *)dev->si_drv1;
553 write_len = error = 0;
554 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH,
555 ("write - uio_resid %d\n", uio->uio_resid));
556 while (uio->uio_resid >= sizeof(user_ccb) && error == 0) {
557 union ccb *ccb;
558
559 error = uiomove((caddr_t)&user_ccb, sizeof(user_ccb), uio);
560 if (error != 0) {
561 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH,
562 ("write - uiomove failed (%d)\n", error));
563 break;
564 }
565 priority = fuword32(&user_ccb->ccb_h.pinfo.priority);
566 if (priority == -1) {
567 error = EINVAL;
568 break;
569 }
570 func_code = fuword32(&user_ccb->ccb_h.func_code);
571 switch (func_code) {
572 case XPT_ACCEPT_TARGET_IO:
573 case XPT_IMMED_NOTIFY:
|
| 574 cam_periph_lock(softc->periph);
|
535 ccb = targgetccb(softc, func_code, priority);
536 descr = (struct targ_cmd_descr *)ccb->ccb_h.targ_descr;
537 descr->user_ccb = user_ccb;
538 descr->func_code = func_code;
539 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH,
540 ("Sent ATIO/INOT (%p)\n", user_ccb));
541 xpt_action(ccb);
542 TAILQ_INSERT_TAIL(&softc->pending_ccb_queue,
543 &ccb->ccb_h,
544 periph_links.tqe);
| 575 ccb = targgetccb(softc, func_code, priority);
576 descr = (struct targ_cmd_descr *)ccb->ccb_h.targ_descr;
577 descr->user_ccb = user_ccb;
578 descr->func_code = func_code;
579 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH,
580 ("Sent ATIO/INOT (%p)\n", user_ccb));
581 xpt_action(ccb);
582 TAILQ_INSERT_TAIL(&softc->pending_ccb_queue,
583 &ccb->ccb_h,
584 periph_links.tqe);
|
| 585 cam_periph_unlock(softc->periph);
|
545 break;
546 default:
| 586 break;
587 default:
|
| 588 cam_periph_lock(softc->periph);
|
547 if ((func_code & XPT_FC_QUEUED) != 0) {
548 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH,
549 ("Sending queued ccb %#x (%p)\n",
550 func_code, user_ccb));
551 descr = targgetdescr(softc);
552 descr->user_ccb = user_ccb;
553 descr->priority = priority;
554 descr->func_code = func_code;
555 TAILQ_INSERT_TAIL(&softc->work_queue,
556 descr, tqe);
557 xpt_schedule(softc->periph, priority);
558 } else {
559 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH,
560 ("Sending inline ccb %#x (%p)\n",
561 func_code, user_ccb));
562 ccb = targgetccb(softc, func_code, priority);
563 descr = (struct targ_cmd_descr *)
564 ccb->ccb_h.targ_descr;
565 descr->user_ccb = user_ccb;
566 descr->priority = priority;
567 descr->func_code = func_code;
568 if (targusermerge(softc, descr, ccb) != EFAULT)
569 targsendccb(softc, ccb, descr);
570 targreturnccb(softc, ccb);
571 }
| 589 if ((func_code & XPT_FC_QUEUED) != 0) {
590 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH,
591 ("Sending queued ccb %#x (%p)\n",
592 func_code, user_ccb));
593 descr = targgetdescr(softc);
594 descr->user_ccb = user_ccb;
595 descr->priority = priority;
596 descr->func_code = func_code;
597 TAILQ_INSERT_TAIL(&softc->work_queue,
598 descr, tqe);
599 xpt_schedule(softc->periph, priority);
600 } else {
601 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH,
602 ("Sending inline ccb %#x (%p)\n",
603 func_code, user_ccb));
604 ccb = targgetccb(softc, func_code, priority);
605 descr = (struct targ_cmd_descr *)
606 ccb->ccb_h.targ_descr;
607 descr->user_ccb = user_ccb;
608 descr->priority = priority;
609 descr->func_code = func_code;
610 if (targusermerge(softc, descr, ccb) != EFAULT)
611 targsendccb(softc, ccb, descr);
612 targreturnccb(softc, ccb);
613 }
|
| 614 cam_periph_unlock(softc->periph);
|
572 break;
573 }
574 write_len += sizeof(user_ccb);
575 }
576
577 /*
578 * If we've successfully taken in some amount of
579 * data, return success for that data first. If
580 * an error is persistent, it will be reported
581 * on the next write.
582 */
583 if (error != 0 && write_len == 0)
584 return (error);
585 if (write_len == 0 && uio->uio_resid != 0)
586 return (ENOSPC);
587 return (0);
588}
589
590/* Process requests (descrs) via the periph-supplied CCBs */
591static void
592targstart(struct cam_periph *periph, union ccb *start_ccb)
593{
594 struct targ_softc *softc;
595 struct targ_cmd_descr *descr, *next_descr;
596 int error;
597
598 softc = (struct targ_softc *)periph->softc;
599 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH, ("targstart %p\n", start_ccb));
600
601 descr = TAILQ_FIRST(&softc->work_queue);
602 if (descr == NULL) {
603 xpt_release_ccb(start_ccb);
604 } else {
605 TAILQ_REMOVE(&softc->work_queue, descr, tqe);
606 next_descr = TAILQ_FIRST(&softc->work_queue);
607
608 /* Initiate a transaction using the descr and supplied CCB */
609 error = targusermerge(softc, descr, start_ccb);
610 if (error == 0)
611 error = targsendccb(softc, start_ccb, descr);
612 if (error != 0) {
613 xpt_print(periph->path,
614 "targsendccb failed, err %d\n", error);
615 xpt_release_ccb(start_ccb);
616 suword(&descr->user_ccb->ccb_h.status,
617 CAM_REQ_CMP_ERR);
618 TAILQ_INSERT_TAIL(&softc->abort_queue, descr, tqe);
619 notify_user(softc);
620 }
621
622 /* If we have more work to do, stay scheduled */
623 if (next_descr != NULL)
624 xpt_schedule(periph, next_descr->priority);
625 }
626}
627
628static int
629targusermerge(struct targ_softc *softc, struct targ_cmd_descr *descr,
630 union ccb *ccb)
631{
632 struct ccb_hdr *u_ccbh, *k_ccbh;
633 size_t ccb_len;
634 int error;
635
636 u_ccbh = &descr->user_ccb->ccb_h;
637 k_ccbh = &ccb->ccb_h;
638
639 /*
640 * There are some fields in the CCB header that need to be
641 * preserved, the rest we get from the user ccb. (See xpt_merge_ccb)
642 */
643 xpt_setup_ccb(k_ccbh, softc->path, descr->priority);
644 k_ccbh->retry_count = fuword32(&u_ccbh->retry_count);
645 k_ccbh->func_code = descr->func_code;
646 k_ccbh->flags = fuword32(&u_ccbh->flags);
647 k_ccbh->timeout = fuword32(&u_ccbh->timeout);
648 ccb_len = targccblen(k_ccbh->func_code) - sizeof(struct ccb_hdr);
649 error = copyin(u_ccbh + 1, k_ccbh + 1, ccb_len);
650 if (error != 0) {
651 k_ccbh->status = CAM_REQ_CMP_ERR;
652 return (error);
653 }
654
655 /* Translate usermode abort_ccb pointer to its kernel counterpart */
656 if (k_ccbh->func_code == XPT_ABORT) {
657 struct ccb_abort *cab;
658 struct ccb_hdr *ccb_h;
659
660 cab = (struct ccb_abort *)ccb;
661 TAILQ_FOREACH(ccb_h, &softc->pending_ccb_queue,
662 periph_links.tqe) {
663 struct targ_cmd_descr *ab_descr;
664
665 ab_descr = (struct targ_cmd_descr *)ccb_h->targ_descr;
666 if (ab_descr->user_ccb == cab->abort_ccb) {
667 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH,
668 ("Changing abort for %p to %p\n",
669 cab->abort_ccb, ccb_h));
670 cab->abort_ccb = (union ccb *)ccb_h;
671 break;
672 }
673 }
674 /* CCB not found, set appropriate status */
675 if (ccb_h == NULL) {
676 k_ccbh->status = CAM_PATH_INVALID;
677 error = ESRCH;
678 }
679 }
680
681 return (error);
682}
683
684/* Build and send a kernel CCB formed from descr->user_ccb */
685static int
686targsendccb(struct targ_softc *softc, union ccb *ccb,
687 struct targ_cmd_descr *descr)
688{
689 struct cam_periph_map_info *mapinfo;
690 struct ccb_hdr *ccb_h;
691 int error;
692
693 ccb_h = &ccb->ccb_h;
694 mapinfo = &descr->mapinfo;
695 mapinfo->num_bufs_used = 0;
696
697 /*
698 * There's no way for the user to have a completion
699 * function, so we put our own completion function in here.
700 * We also stash in a reference to our descriptor so targreturnccb()
701 * can find our mapping info.
702 */
703 ccb_h->cbfcnp = targdone;
704 ccb_h->targ_descr = descr;
705
706 /*
707 * We only attempt to map the user memory into kernel space
708 * if they haven't passed in a physical memory pointer,
709 * and if there is actually an I/O operation to perform.
710 * Right now cam_periph_mapmem() only supports SCSI and device
711 * match CCBs. For the SCSI CCBs, we only pass the CCB in if
712 * there's actually data to map. cam_periph_mapmem() will do the
713 * right thing, even if there isn't data to map, but since CCBs
714 * without data are a reasonably common occurance (e.g. test unit
715 * ready), it will save a few cycles if we check for it here.
716 */
717 if (((ccb_h->flags & CAM_DATA_PHYS) == 0)
718 && (((ccb_h->func_code == XPT_CONT_TARGET_IO)
719 && ((ccb_h->flags & CAM_DIR_MASK) != CAM_DIR_NONE))
720 || (ccb_h->func_code == XPT_DEV_MATCH))) {
721
722 error = cam_periph_mapmem(ccb, mapinfo);
723
724 /*
725 * cam_periph_mapmem returned an error, we can't continue.
726 * Return the error to the user.
727 */
728 if (error) {
729 ccb_h->status = CAM_REQ_CMP_ERR;
730 mapinfo->num_bufs_used = 0;
731 return (error);
732 }
733 }
734
735 /*
736 * Once queued on the pending CCB list, this CCB will be protected
737 * by our error recovery handler.
738 */
739 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH, ("sendccb %p\n", ccb));
740 if (XPT_FC_IS_QUEUED(ccb)) {
741 TAILQ_INSERT_TAIL(&softc->pending_ccb_queue, ccb_h,
742 periph_links.tqe);
743 }
744 xpt_action(ccb);
745
746 return (0);
747}
748
749/* Completion routine for CCBs (called at splsoftcam) */
750static void
751targdone(struct cam_periph *periph, union ccb *done_ccb)
752{
753 struct targ_softc *softc;
754 cam_status status;
755
756 CAM_DEBUG(periph->path, CAM_DEBUG_PERIPH, ("targdone %p\n", done_ccb));
757 softc = (struct targ_softc *)periph->softc;
758 TAILQ_REMOVE(&softc->pending_ccb_queue, &done_ccb->ccb_h,
759 periph_links.tqe);
760 status = done_ccb->ccb_h.status & CAM_STATUS_MASK;
761
762 /* If we're no longer enabled, throw away CCB */
763 if ((softc->state & TARG_STATE_LUN_ENABLED) == 0) {
764 targfreeccb(softc, done_ccb);
765 return;
766 }
767 /* abort_all_pending() waits for pending queue to be empty */
768 if (TAILQ_EMPTY(&softc->pending_ccb_queue))
769 wakeup(&softc->pending_ccb_queue);
770
771 switch (done_ccb->ccb_h.func_code) {
772 /* All FC_*_QUEUED CCBs go back to userland */
773 case XPT_IMMED_NOTIFY:
774 case XPT_ACCEPT_TARGET_IO:
775 case XPT_CONT_TARGET_IO:
776 TAILQ_INSERT_TAIL(&softc->user_ccb_queue, &done_ccb->ccb_h,
777 periph_links.tqe);
778 notify_user(softc);
779 break;
780 default:
781 panic("targdone: impossible xpt opcode %#x",
782 done_ccb->ccb_h.func_code);
783 /* NOTREACHED */
784 }
785}
786
787/* Return CCBs to the user from the user queue and abort queue */
788static int
789targread(struct cdev *dev, struct uio *uio, int ioflag)
790{
791 struct descr_queue *abort_queue;
792 struct targ_cmd_descr *user_descr;
793 struct targ_softc *softc;
794 struct ccb_queue *user_queue;
795 struct ccb_hdr *ccb_h;
796 union ccb *user_ccb;
797 int read_len, error;
798
| 615 break;
616 }
617 write_len += sizeof(user_ccb);
618 }
619
620 /*
621 * If we've successfully taken in some amount of
622 * data, return success for that data first. If
623 * an error is persistent, it will be reported
624 * on the next write.
625 */
626 if (error != 0 && write_len == 0)
627 return (error);
628 if (write_len == 0 && uio->uio_resid != 0)
629 return (ENOSPC);
630 return (0);
631}
632
633/* Process requests (descrs) via the periph-supplied CCBs */
634static void
635targstart(struct cam_periph *periph, union ccb *start_ccb)
636{
637 struct targ_softc *softc;
638 struct targ_cmd_descr *descr, *next_descr;
639 int error;
640
641 softc = (struct targ_softc *)periph->softc;
642 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH, ("targstart %p\n", start_ccb));
643
644 descr = TAILQ_FIRST(&softc->work_queue);
645 if (descr == NULL) {
646 xpt_release_ccb(start_ccb);
647 } else {
648 TAILQ_REMOVE(&softc->work_queue, descr, tqe);
649 next_descr = TAILQ_FIRST(&softc->work_queue);
650
651 /* Initiate a transaction using the descr and supplied CCB */
652 error = targusermerge(softc, descr, start_ccb);
653 if (error == 0)
654 error = targsendccb(softc, start_ccb, descr);
655 if (error != 0) {
656 xpt_print(periph->path,
657 "targsendccb failed, err %d\n", error);
658 xpt_release_ccb(start_ccb);
659 suword(&descr->user_ccb->ccb_h.status,
660 CAM_REQ_CMP_ERR);
661 TAILQ_INSERT_TAIL(&softc->abort_queue, descr, tqe);
662 notify_user(softc);
663 }
664
665 /* If we have more work to do, stay scheduled */
666 if (next_descr != NULL)
667 xpt_schedule(periph, next_descr->priority);
668 }
669}
670
671static int
672targusermerge(struct targ_softc *softc, struct targ_cmd_descr *descr,
673 union ccb *ccb)
674{
675 struct ccb_hdr *u_ccbh, *k_ccbh;
676 size_t ccb_len;
677 int error;
678
679 u_ccbh = &descr->user_ccb->ccb_h;
680 k_ccbh = &ccb->ccb_h;
681
682 /*
683 * There are some fields in the CCB header that need to be
684 * preserved, the rest we get from the user ccb. (See xpt_merge_ccb)
685 */
686 xpt_setup_ccb(k_ccbh, softc->path, descr->priority);
687 k_ccbh->retry_count = fuword32(&u_ccbh->retry_count);
688 k_ccbh->func_code = descr->func_code;
689 k_ccbh->flags = fuword32(&u_ccbh->flags);
690 k_ccbh->timeout = fuword32(&u_ccbh->timeout);
691 ccb_len = targccblen(k_ccbh->func_code) - sizeof(struct ccb_hdr);
692 error = copyin(u_ccbh + 1, k_ccbh + 1, ccb_len);
693 if (error != 0) {
694 k_ccbh->status = CAM_REQ_CMP_ERR;
695 return (error);
696 }
697
698 /* Translate usermode abort_ccb pointer to its kernel counterpart */
699 if (k_ccbh->func_code == XPT_ABORT) {
700 struct ccb_abort *cab;
701 struct ccb_hdr *ccb_h;
702
703 cab = (struct ccb_abort *)ccb;
704 TAILQ_FOREACH(ccb_h, &softc->pending_ccb_queue,
705 periph_links.tqe) {
706 struct targ_cmd_descr *ab_descr;
707
708 ab_descr = (struct targ_cmd_descr *)ccb_h->targ_descr;
709 if (ab_descr->user_ccb == cab->abort_ccb) {
710 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH,
711 ("Changing abort for %p to %p\n",
712 cab->abort_ccb, ccb_h));
713 cab->abort_ccb = (union ccb *)ccb_h;
714 break;
715 }
716 }
717 /* CCB not found, set appropriate status */
718 if (ccb_h == NULL) {
719 k_ccbh->status = CAM_PATH_INVALID;
720 error = ESRCH;
721 }
722 }
723
724 return (error);
725}
726
727/* Build and send a kernel CCB formed from descr->user_ccb */
728static int
729targsendccb(struct targ_softc *softc, union ccb *ccb,
730 struct targ_cmd_descr *descr)
731{
732 struct cam_periph_map_info *mapinfo;
733 struct ccb_hdr *ccb_h;
734 int error;
735
736 ccb_h = &ccb->ccb_h;
737 mapinfo = &descr->mapinfo;
738 mapinfo->num_bufs_used = 0;
739
740 /*
741 * There's no way for the user to have a completion
742 * function, so we put our own completion function in here.
743 * We also stash in a reference to our descriptor so targreturnccb()
744 * can find our mapping info.
745 */
746 ccb_h->cbfcnp = targdone;
747 ccb_h->targ_descr = descr;
748
749 /*
750 * We only attempt to map the user memory into kernel space
751 * if they haven't passed in a physical memory pointer,
752 * and if there is actually an I/O operation to perform.
753 * Right now cam_periph_mapmem() only supports SCSI and device
754 * match CCBs. For the SCSI CCBs, we only pass the CCB in if
755 * there's actually data to map. cam_periph_mapmem() will do the
756 * right thing, even if there isn't data to map, but since CCBs
757 * without data are a reasonably common occurance (e.g. test unit
758 * ready), it will save a few cycles if we check for it here.
759 */
760 if (((ccb_h->flags & CAM_DATA_PHYS) == 0)
761 && (((ccb_h->func_code == XPT_CONT_TARGET_IO)
762 && ((ccb_h->flags & CAM_DIR_MASK) != CAM_DIR_NONE))
763 || (ccb_h->func_code == XPT_DEV_MATCH))) {
764
765 error = cam_periph_mapmem(ccb, mapinfo);
766
767 /*
768 * cam_periph_mapmem returned an error, we can't continue.
769 * Return the error to the user.
770 */
771 if (error) {
772 ccb_h->status = CAM_REQ_CMP_ERR;
773 mapinfo->num_bufs_used = 0;
774 return (error);
775 }
776 }
777
778 /*
779 * Once queued on the pending CCB list, this CCB will be protected
780 * by our error recovery handler.
781 */
782 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH, ("sendccb %p\n", ccb));
783 if (XPT_FC_IS_QUEUED(ccb)) {
784 TAILQ_INSERT_TAIL(&softc->pending_ccb_queue, ccb_h,
785 periph_links.tqe);
786 }
787 xpt_action(ccb);
788
789 return (0);
790}
791
792/* Completion routine for CCBs (called at splsoftcam) */
793static void
794targdone(struct cam_periph *periph, union ccb *done_ccb)
795{
796 struct targ_softc *softc;
797 cam_status status;
798
799 CAM_DEBUG(periph->path, CAM_DEBUG_PERIPH, ("targdone %p\n", done_ccb));
800 softc = (struct targ_softc *)periph->softc;
801 TAILQ_REMOVE(&softc->pending_ccb_queue, &done_ccb->ccb_h,
802 periph_links.tqe);
803 status = done_ccb->ccb_h.status & CAM_STATUS_MASK;
804
805 /* If we're no longer enabled, throw away CCB */
806 if ((softc->state & TARG_STATE_LUN_ENABLED) == 0) {
807 targfreeccb(softc, done_ccb);
808 return;
809 }
810 /* abort_all_pending() waits for pending queue to be empty */
811 if (TAILQ_EMPTY(&softc->pending_ccb_queue))
812 wakeup(&softc->pending_ccb_queue);
813
814 switch (done_ccb->ccb_h.func_code) {
815 /* All FC_*_QUEUED CCBs go back to userland */
816 case XPT_IMMED_NOTIFY:
817 case XPT_ACCEPT_TARGET_IO:
818 case XPT_CONT_TARGET_IO:
819 TAILQ_INSERT_TAIL(&softc->user_ccb_queue, &done_ccb->ccb_h,
820 periph_links.tqe);
821 notify_user(softc);
822 break;
823 default:
824 panic("targdone: impossible xpt opcode %#x",
825 done_ccb->ccb_h.func_code);
826 /* NOTREACHED */
827 }
828}
829
830/* Return CCBs to the user from the user queue and abort queue */
831static int
832targread(struct cdev *dev, struct uio *uio, int ioflag)
833{
834 struct descr_queue *abort_queue;
835 struct targ_cmd_descr *user_descr;
836 struct targ_softc *softc;
837 struct ccb_queue *user_queue;
838 struct ccb_hdr *ccb_h;
839 union ccb *user_ccb;
840 int read_len, error;
841
|
799 mtx_lock(&Giant);
800
| |
801 error = 0;
802 read_len = 0;
803 softc = (struct targ_softc *)dev->si_drv1;
804 user_queue = &softc->user_ccb_queue;
805 abort_queue = &softc->abort_queue;
806 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH, ("targread\n"));
807
808 /* If no data is available, wait or return immediately */
| 842 error = 0;
843 read_len = 0;
844 softc = (struct targ_softc *)dev->si_drv1;
845 user_queue = &softc->user_ccb_queue;
846 abort_queue = &softc->abort_queue;
847 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH, ("targread\n"));
848
849 /* If no data is available, wait or return immediately */
|
| 850 cam_periph_lock(softc->periph);
|
809 ccb_h = TAILQ_FIRST(user_queue);
810 user_descr = TAILQ_FIRST(abort_queue);
811 while (ccb_h == NULL && user_descr == NULL) {
812 if ((ioflag & IO_NDELAY) == 0) {
| 851 ccb_h = TAILQ_FIRST(user_queue);
852 user_descr = TAILQ_FIRST(abort_queue);
853 while (ccb_h == NULL && user_descr == NULL) {
854 if ((ioflag & IO_NDELAY) == 0) {
|
813 error = tsleep(user_queue,
| 855 error = msleep(user_queue, softc->periph->sim->mtx,
|
814 PRIBIO | PCATCH, "targrd", 0);
815 ccb_h = TAILQ_FIRST(user_queue);
816 user_descr = TAILQ_FIRST(abort_queue);
817 if (error != 0) {
818 if (error == ERESTART) {
819 continue;
820 } else {
821 goto read_fail;
822 }
823 }
824 } else {
| 856 PRIBIO | PCATCH, "targrd", 0);
857 ccb_h = TAILQ_FIRST(user_queue);
858 user_descr = TAILQ_FIRST(abort_queue);
859 if (error != 0) {
860 if (error == ERESTART) {
861 continue;
862 } else {
863 goto read_fail;
864 }
865 }
866 } else {
|
825 mtx_unlock(&Giant);
| 867 cam_periph_unlock(softc->periph);
|
826 return (EAGAIN);
827 }
828 }
829
830 /* Data is available so fill the user's buffer */
831 while (ccb_h != NULL) {
832 struct targ_cmd_descr *descr;
833
834 if (uio->uio_resid < sizeof(user_ccb))
835 break;
836 TAILQ_REMOVE(user_queue, ccb_h, periph_links.tqe);
837 descr = (struct targ_cmd_descr *)ccb_h->targ_descr;
838 user_ccb = descr->user_ccb;
839 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH,
840 ("targread ccb %p (%p)\n", ccb_h, user_ccb));
841 error = targreturnccb(softc, (union ccb *)ccb_h);
842 if (error != 0)
843 goto read_fail;
| 868 return (EAGAIN);
869 }
870 }
871
872 /* Data is available so fill the user's buffer */
873 while (ccb_h != NULL) {
874 struct targ_cmd_descr *descr;
875
876 if (uio->uio_resid < sizeof(user_ccb))
877 break;
878 TAILQ_REMOVE(user_queue, ccb_h, periph_links.tqe);
879 descr = (struct targ_cmd_descr *)ccb_h->targ_descr;
880 user_ccb = descr->user_ccb;
881 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH,
882 ("targread ccb %p (%p)\n", ccb_h, user_ccb));
883 error = targreturnccb(softc, (union ccb *)ccb_h);
884 if (error != 0)
885 goto read_fail;
|
| 886 cam_periph_unlock(softc->periph);
|
844 error = uiomove((caddr_t)&user_ccb, sizeof(user_ccb), uio);
| 887 error = uiomove((caddr_t)&user_ccb, sizeof(user_ccb), uio);
|
| 888 cam_periph_lock(softc->periph);
|
845 if (error != 0)
846 goto read_fail;
847 read_len += sizeof(user_ccb);
848
849 ccb_h = TAILQ_FIRST(user_queue);
850 }
851
852 /* Flush out any aborted descriptors */
853 while (user_descr != NULL) {
854 if (uio->uio_resid < sizeof(user_ccb))
855 break;
856 TAILQ_REMOVE(abort_queue, user_descr, tqe);
857 user_ccb = user_descr->user_ccb;
858 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH,
859 ("targread aborted descr %p (%p)\n",
860 user_descr, user_ccb));
861 suword(&user_ccb->ccb_h.status, CAM_REQ_ABORTED);
| 889 if (error != 0)
890 goto read_fail;
891 read_len += sizeof(user_ccb);
892
893 ccb_h = TAILQ_FIRST(user_queue);
894 }
895
896 /* Flush out any aborted descriptors */
897 while (user_descr != NULL) {
898 if (uio->uio_resid < sizeof(user_ccb))
899 break;
900 TAILQ_REMOVE(abort_queue, user_descr, tqe);
901 user_ccb = user_descr->user_ccb;
902 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH,
903 ("targread aborted descr %p (%p)\n",
904 user_descr, user_ccb));
905 suword(&user_ccb->ccb_h.status, CAM_REQ_ABORTED);
|
| 906 cam_periph_unlock(softc->periph);
|
862 error = uiomove((caddr_t)&user_ccb, sizeof(user_ccb), uio);
| 907 error = uiomove((caddr_t)&user_ccb, sizeof(user_ccb), uio);
|
| 908 cam_periph_lock(softc->periph);
|
863 if (error != 0)
864 goto read_fail;
865 read_len += sizeof(user_ccb);
866
867 user_descr = TAILQ_FIRST(abort_queue);
868 }
869
870 /*
871 * If we've successfully read some amount of data, don't report an
872 * error. If the error is persistent, it will be reported on the
873 * next read().
874 */
875 if (read_len == 0 && uio->uio_resid != 0)
876 error = ENOSPC;
877
878read_fail:
| 909 if (error != 0)
910 goto read_fail;
911 read_len += sizeof(user_ccb);
912
913 user_descr = TAILQ_FIRST(abort_queue);
914 }
915
916 /*
917 * If we've successfully read some amount of data, don't report an
918 * error. If the error is persistent, it will be reported on the
919 * next read().
920 */
921 if (read_len == 0 && uio->uio_resid != 0)
922 error = ENOSPC;
923
924read_fail:
|
879 mtx_unlock(&Giant);
| 925 cam_periph_unlock(softc->periph);
|
880 return (error);
881}
882
883/* Copy completed ccb back to the user */
884static int
885targreturnccb(struct targ_softc *softc, union ccb *ccb)
886{
887 struct targ_cmd_descr *descr;
888 struct ccb_hdr *u_ccbh;
889 size_t ccb_len;
890 int error;
891
892 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH, ("targreturnccb %p\n", ccb));
893 descr = (struct targ_cmd_descr *)ccb->ccb_h.targ_descr;
894 u_ccbh = &descr->user_ccb->ccb_h;
895
896 /* Copy out the central portion of the ccb_hdr */
897 copyout(&ccb->ccb_h.retry_count, &u_ccbh->retry_count,
898 offsetof(struct ccb_hdr, periph_priv) -
899 offsetof(struct ccb_hdr, retry_count));
900
901 /* Copy out the rest of the ccb (after the ccb_hdr) */
902 ccb_len = targccblen(ccb->ccb_h.func_code) - sizeof(struct ccb_hdr);
903 if (descr->mapinfo.num_bufs_used != 0)
904 cam_periph_unmapmem(ccb, &descr->mapinfo);
905 error = copyout(&ccb->ccb_h + 1, u_ccbh + 1, ccb_len);
906 if (error != 0) {
907 xpt_print(softc->path,
908 "targreturnccb - CCB copyout failed (%d)\n", error);
909 }
910 /* Free CCB or send back to devq. */
911 targfreeccb(softc, ccb);
912
913 return (error);
914}
915
916static union ccb *
917targgetccb(struct targ_softc *softc, xpt_opcode type, int priority)
918{
919 union ccb *ccb;
920 int ccb_len;
921
922 ccb_len = targccblen(type);
923 MALLOC(ccb, union ccb *, ccb_len, M_TARG, M_WAITOK);
924 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH, ("getccb %p\n", ccb));
925
926 xpt_setup_ccb(&ccb->ccb_h, softc->path, priority);
927 ccb->ccb_h.func_code = type;
928 ccb->ccb_h.cbfcnp = targdone;
929 ccb->ccb_h.targ_descr = targgetdescr(softc);
930 return (ccb);
931}
932
933static void
934targfreeccb(struct targ_softc *softc, union ccb *ccb)
935{
936 CAM_DEBUG_PRINT(CAM_DEBUG_PERIPH, ("targfreeccb descr %p and\n",
937 ccb->ccb_h.targ_descr));
938 FREE(ccb->ccb_h.targ_descr, M_TARG);
939
940 switch (ccb->ccb_h.func_code) {
941 case XPT_ACCEPT_TARGET_IO:
942 case XPT_IMMED_NOTIFY:
943 CAM_DEBUG_PRINT(CAM_DEBUG_PERIPH, ("freeing ccb %p\n", ccb));
944 FREE(ccb, M_TARG);
945 break;
946 default:
947 /* Send back CCB if we got it from the periph */
948 if (XPT_FC_IS_QUEUED(ccb)) {
949 CAM_DEBUG_PRINT(CAM_DEBUG_PERIPH,
950 ("returning queued ccb %p\n", ccb));
951 xpt_release_ccb(ccb);
952 } else {
953 CAM_DEBUG_PRINT(CAM_DEBUG_PERIPH,
954 ("freeing ccb %p\n", ccb));
955 FREE(ccb, M_TARG);
956 }
957 break;
958 }
959}
960
961static struct targ_cmd_descr *
962targgetdescr(struct targ_softc *softc)
963{
964 struct targ_cmd_descr *descr;
965
966 MALLOC(descr, struct targ_cmd_descr *, sizeof(*descr), M_TARG,
967 M_WAITOK);
968 descr->mapinfo.num_bufs_used = 0;
969 return (descr);
970}
971
972static void
973targinit(void)
974{
975 EVENTHANDLER_REGISTER(dev_clone, targclone, 0, 1000);
976}
977
978static void
979targclone(void *arg, struct ucred *cred, char *name, int namelen,
980 struct cdev **dev)
981{
982 int u;
983
984 if (*dev != NULL)
985 return;
986 if (dev_stdclone(name, NULL, "targ", &u) != 1)
987 return;
988 *dev = make_dev(&targ_cdevsw, unit2minor(u), UID_ROOT, GID_WHEEL,
989 0600, "targ%d", u);
990 dev_ref(*dev);
991 (*dev)->si_flags |= SI_CHEAPCLONE;
992}
993
994static void
995targasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg)
996{
997 /* All events are handled in usermode by INOTs */
998 panic("targasync() called, should be an INOT instead");
999}
1000
1001/* Cancel all pending requests and CCBs awaiting work. */
1002static void
1003abort_all_pending(struct targ_softc *softc)
1004{
1005 struct targ_cmd_descr *descr;
1006 struct ccb_abort cab;
1007 struct ccb_hdr *ccb_h;
| 926 return (error);
927}
928
929/* Copy completed ccb back to the user */
930static int
931targreturnccb(struct targ_softc *softc, union ccb *ccb)
932{
933 struct targ_cmd_descr *descr;
934 struct ccb_hdr *u_ccbh;
935 size_t ccb_len;
936 int error;
937
938 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH, ("targreturnccb %p\n", ccb));
939 descr = (struct targ_cmd_descr *)ccb->ccb_h.targ_descr;
940 u_ccbh = &descr->user_ccb->ccb_h;
941
942 /* Copy out the central portion of the ccb_hdr */
943 copyout(&ccb->ccb_h.retry_count, &u_ccbh->retry_count,
944 offsetof(struct ccb_hdr, periph_priv) -
945 offsetof(struct ccb_hdr, retry_count));
946
947 /* Copy out the rest of the ccb (after the ccb_hdr) */
948 ccb_len = targccblen(ccb->ccb_h.func_code) - sizeof(struct ccb_hdr);
949 if (descr->mapinfo.num_bufs_used != 0)
950 cam_periph_unmapmem(ccb, &descr->mapinfo);
951 error = copyout(&ccb->ccb_h + 1, u_ccbh + 1, ccb_len);
952 if (error != 0) {
953 xpt_print(softc->path,
954 "targreturnccb - CCB copyout failed (%d)\n", error);
955 }
956 /* Free CCB or send back to devq. */
957 targfreeccb(softc, ccb);
958
959 return (error);
960}
961
962static union ccb *
963targgetccb(struct targ_softc *softc, xpt_opcode type, int priority)
964{
965 union ccb *ccb;
966 int ccb_len;
967
968 ccb_len = targccblen(type);
969 MALLOC(ccb, union ccb *, ccb_len, M_TARG, M_WAITOK);
970 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH, ("getccb %p\n", ccb));
971
972 xpt_setup_ccb(&ccb->ccb_h, softc->path, priority);
973 ccb->ccb_h.func_code = type;
974 ccb->ccb_h.cbfcnp = targdone;
975 ccb->ccb_h.targ_descr = targgetdescr(softc);
976 return (ccb);
977}
978
979static void
980targfreeccb(struct targ_softc *softc, union ccb *ccb)
981{
982 CAM_DEBUG_PRINT(CAM_DEBUG_PERIPH, ("targfreeccb descr %p and\n",
983 ccb->ccb_h.targ_descr));
984 FREE(ccb->ccb_h.targ_descr, M_TARG);
985
986 switch (ccb->ccb_h.func_code) {
987 case XPT_ACCEPT_TARGET_IO:
988 case XPT_IMMED_NOTIFY:
989 CAM_DEBUG_PRINT(CAM_DEBUG_PERIPH, ("freeing ccb %p\n", ccb));
990 FREE(ccb, M_TARG);
991 break;
992 default:
993 /* Send back CCB if we got it from the periph */
994 if (XPT_FC_IS_QUEUED(ccb)) {
995 CAM_DEBUG_PRINT(CAM_DEBUG_PERIPH,
996 ("returning queued ccb %p\n", ccb));
997 xpt_release_ccb(ccb);
998 } else {
999 CAM_DEBUG_PRINT(CAM_DEBUG_PERIPH,
1000 ("freeing ccb %p\n", ccb));
1001 FREE(ccb, M_TARG);
1002 }
1003 break;
1004 }
1005}
1006
1007static struct targ_cmd_descr *
1008targgetdescr(struct targ_softc *softc)
1009{
1010 struct targ_cmd_descr *descr;
1011
1012 MALLOC(descr, struct targ_cmd_descr *, sizeof(*descr), M_TARG,
1013 M_WAITOK);
1014 descr->mapinfo.num_bufs_used = 0;
1015 return (descr);
1016}
1017
1018static void
1019targinit(void)
1020{
1021 EVENTHANDLER_REGISTER(dev_clone, targclone, 0, 1000);
1022}
1023
1024static void
1025targclone(void *arg, struct ucred *cred, char *name, int namelen,
1026 struct cdev **dev)
1027{
1028 int u;
1029
1030 if (*dev != NULL)
1031 return;
1032 if (dev_stdclone(name, NULL, "targ", &u) != 1)
1033 return;
1034 *dev = make_dev(&targ_cdevsw, unit2minor(u), UID_ROOT, GID_WHEEL,
1035 0600, "targ%d", u);
1036 dev_ref(*dev);
1037 (*dev)->si_flags |= SI_CHEAPCLONE;
1038}
1039
1040static void
1041targasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg)
1042{
1043 /* All events are handled in usermode by INOTs */
1044 panic("targasync() called, should be an INOT instead");
1045}
1046
1047/* Cancel all pending requests and CCBs awaiting work. */
1048static void
1049abort_all_pending(struct targ_softc *softc)
1050{
1051 struct targ_cmd_descr *descr;
1052 struct ccb_abort cab;
1053 struct ccb_hdr *ccb_h;
|
| 1054 struct cam_sim *sim;
|
1008
1009 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH, ("abort_all_pending\n"));
1010
1011 /* First abort the descriptors awaiting resources */
1012 while ((descr = TAILQ_FIRST(&softc->work_queue)) != NULL) {
1013 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH,
1014 ("Aborting descr from workq %p\n", descr));
1015 TAILQ_REMOVE(&softc->work_queue, descr, tqe);
1016 TAILQ_INSERT_TAIL(&softc->abort_queue, descr, tqe);
1017 }
1018
1019 /*
1020 * Then abort all pending CCBs.
1021 * targdone() will return the aborted CCB via user_ccb_queue
1022 */
1023 xpt_setup_ccb(&cab.ccb_h, softc->path, /*priority*/0);
1024 cab.ccb_h.func_code = XPT_ABORT;
1025 cab.ccb_h.status = CAM_REQ_CMP_ERR;
1026 TAILQ_FOREACH(ccb_h, &softc->pending_ccb_queue, periph_links.tqe) {
1027 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH,
1028 ("Aborting pending CCB %p\n", ccb_h));
1029 cab.abort_ccb = (union ccb *)ccb_h;
1030 xpt_action((union ccb *)&cab);
1031 if (cab.ccb_h.status != CAM_REQ_CMP) {
1032 xpt_print(cab.ccb_h.path,
1033 "Unable to abort CCB, status %#x\n",
1034 cab.ccb_h.status);
1035 }
1036 }
1037
1038 /* If we aborted at least one pending CCB ok, wait for it. */
1039 if (cab.ccb_h.status == CAM_REQ_CMP) {
| 1055
1056 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH, ("abort_all_pending\n"));
1057
1058 /* First abort the descriptors awaiting resources */
1059 while ((descr = TAILQ_FIRST(&softc->work_queue)) != NULL) {
1060 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH,
1061 ("Aborting descr from workq %p\n", descr));
1062 TAILQ_REMOVE(&softc->work_queue, descr, tqe);
1063 TAILQ_INSERT_TAIL(&softc->abort_queue, descr, tqe);
1064 }
1065
1066 /*
1067 * Then abort all pending CCBs.
1068 * targdone() will return the aborted CCB via user_ccb_queue
1069 */
1070 xpt_setup_ccb(&cab.ccb_h, softc->path, /*priority*/0);
1071 cab.ccb_h.func_code = XPT_ABORT;
1072 cab.ccb_h.status = CAM_REQ_CMP_ERR;
1073 TAILQ_FOREACH(ccb_h, &softc->pending_ccb_queue, periph_links.tqe) {
1074 CAM_DEBUG(softc->path, CAM_DEBUG_PERIPH,
1075 ("Aborting pending CCB %p\n", ccb_h));
1076 cab.abort_ccb = (union ccb *)ccb_h;
1077 xpt_action((union ccb *)&cab);
1078 if (cab.ccb_h.status != CAM_REQ_CMP) {
1079 xpt_print(cab.ccb_h.path,
1080 "Unable to abort CCB, status %#x\n",
1081 cab.ccb_h.status);
1082 }
1083 }
1084
1085 /* If we aborted at least one pending CCB ok, wait for it. */
1086 if (cab.ccb_h.status == CAM_REQ_CMP) {
|
1040 tsleep(&softc->pending_ccb_queue,
| 1087 sim = xpt_path_sim(softc->path);
1088 msleep(&softc->pending_ccb_queue, sim->mtx,
|
1041 PRIBIO | PCATCH, "tgabrt", 0);
1042 }
1043
1044 /* If we aborted anything from the work queue, wakeup user. */
1045 if (!TAILQ_EMPTY(&softc->user_ccb_queue)
1046 || !TAILQ_EMPTY(&softc->abort_queue))
1047 notify_user(softc);
1048}
1049
1050/* Notify the user that data is ready */
1051static void
1052notify_user(struct targ_softc *softc)
1053{
1054 /*
1055 * Notify users sleeping via poll(), kqueue(), and
1056 * blocking read().
1057 */
1058 selwakeuppri(&softc->read_select, PRIBIO);
1059 KNOTE_UNLOCKED(&softc->read_select.si_note, 0);
1060 wakeup(&softc->user_ccb_queue);
1061}
1062
1063/* Convert CAM status to errno values */
1064static int
1065targcamstatus(cam_status status)
1066{
1067 switch (status & CAM_STATUS_MASK) {
1068 case CAM_REQ_CMP: /* CCB request completed without error */
1069 return (0);
1070 case CAM_REQ_INPROG: /* CCB request is in progress */
1071 return (EINPROGRESS);
1072 case CAM_REQ_CMP_ERR: /* CCB request completed with an error */
1073 return (EIO);
1074 case CAM_PROVIDE_FAIL: /* Unable to provide requested capability */
1075 return (ENOTTY);
1076 case CAM_FUNC_NOTAVAIL: /* The requested function is not available */
1077 return (ENOTSUP);
1078 case CAM_LUN_ALRDY_ENA: /* LUN is already enabled for target mode */
1079 return (EADDRINUSE);
1080 case CAM_PATH_INVALID: /* Supplied Path ID is invalid */
1081 case CAM_DEV_NOT_THERE: /* SCSI Device Not Installed/there */
1082 return (ENOENT);
1083 case CAM_REQ_ABORTED: /* CCB request aborted by the host */
1084 return (ECANCELED);
1085 case CAM_CMD_TIMEOUT: /* Command timeout */
1086 return (ETIMEDOUT);
1087 case CAM_REQUEUE_REQ: /* Requeue to preserve transaction ordering */
1088 return (EAGAIN);
1089 case CAM_REQ_INVALID: /* CCB request was invalid */
1090 return (EINVAL);
1091 case CAM_RESRC_UNAVAIL: /* Resource Unavailable */
1092 return (ENOMEM);
1093 case CAM_BUSY: /* CAM subsytem is busy */
1094 case CAM_UA_ABORT: /* Unable to abort CCB request */
1095 return (EBUSY);
1096 default:
1097 return (ENXIO);
1098 }
1099}
1100
1101static size_t
1102targccblen(xpt_opcode func_code)
1103{
1104 int len;
1105
1106 /* Codes we expect to see as a target */
1107 switch (func_code) {
1108 case XPT_CONT_TARGET_IO:
1109 case XPT_SCSI_IO:
1110 len = sizeof(struct ccb_scsiio);
1111 break;
1112 case XPT_ACCEPT_TARGET_IO:
1113 len = sizeof(struct ccb_accept_tio);
1114 break;
1115 case XPT_IMMED_NOTIFY:
1116 len = sizeof(struct ccb_immed_notify);
1117 break;
1118 case XPT_REL_SIMQ:
1119 len = sizeof(struct ccb_relsim);
1120 break;
1121 case XPT_PATH_INQ:
1122 len = sizeof(struct ccb_pathinq);
1123 break;
1124 case XPT_DEBUG:
1125 len = sizeof(struct ccb_debug);
1126 break;
1127 case XPT_ABORT:
1128 len = sizeof(struct ccb_abort);
1129 break;
1130 case XPT_EN_LUN:
1131 len = sizeof(struct ccb_en_lun);
1132 break;
1133 default:
1134 len = sizeof(union ccb);
1135 break;
1136 }
1137
1138 return (len);
1139}
| 1089 PRIBIO | PCATCH, "tgabrt", 0);
1090 }
1091
1092 /* If we aborted anything from the work queue, wakeup user. */
1093 if (!TAILQ_EMPTY(&softc->user_ccb_queue)
1094 || !TAILQ_EMPTY(&softc->abort_queue))
1095 notify_user(softc);
1096}
1097
1098/* Notify the user that data is ready */
1099static void
1100notify_user(struct targ_softc *softc)
1101{
1102 /*
1103 * Notify users sleeping via poll(), kqueue(), and
1104 * blocking read().
1105 */
1106 selwakeuppri(&softc->read_select, PRIBIO);
1107 KNOTE_UNLOCKED(&softc->read_select.si_note, 0);
1108 wakeup(&softc->user_ccb_queue);
1109}
1110
1111/* Convert CAM status to errno values */
1112static int
1113targcamstatus(cam_status status)
1114{
1115 switch (status & CAM_STATUS_MASK) {
1116 case CAM_REQ_CMP: /* CCB request completed without error */
1117 return (0);
1118 case CAM_REQ_INPROG: /* CCB request is in progress */
1119 return (EINPROGRESS);
1120 case CAM_REQ_CMP_ERR: /* CCB request completed with an error */
1121 return (EIO);
1122 case CAM_PROVIDE_FAIL: /* Unable to provide requested capability */
1123 return (ENOTTY);
1124 case CAM_FUNC_NOTAVAIL: /* The requested function is not available */
1125 return (ENOTSUP);
1126 case CAM_LUN_ALRDY_ENA: /* LUN is already enabled for target mode */
1127 return (EADDRINUSE);
1128 case CAM_PATH_INVALID: /* Supplied Path ID is invalid */
1129 case CAM_DEV_NOT_THERE: /* SCSI Device Not Installed/there */
1130 return (ENOENT);
1131 case CAM_REQ_ABORTED: /* CCB request aborted by the host */
1132 return (ECANCELED);
1133 case CAM_CMD_TIMEOUT: /* Command timeout */
1134 return (ETIMEDOUT);
1135 case CAM_REQUEUE_REQ: /* Requeue to preserve transaction ordering */
1136 return (EAGAIN);
1137 case CAM_REQ_INVALID: /* CCB request was invalid */
1138 return (EINVAL);
1139 case CAM_RESRC_UNAVAIL: /* Resource Unavailable */
1140 return (ENOMEM);
1141 case CAM_BUSY: /* CAM subsytem is busy */
1142 case CAM_UA_ABORT: /* Unable to abort CCB request */
1143 return (EBUSY);
1144 default:
1145 return (ENXIO);
1146 }
1147}
1148
1149static size_t
1150targccblen(xpt_opcode func_code)
1151{
1152 int len;
1153
1154 /* Codes we expect to see as a target */
1155 switch (func_code) {
1156 case XPT_CONT_TARGET_IO:
1157 case XPT_SCSI_IO:
1158 len = sizeof(struct ccb_scsiio);
1159 break;
1160 case XPT_ACCEPT_TARGET_IO:
1161 len = sizeof(struct ccb_accept_tio);
1162 break;
1163 case XPT_IMMED_NOTIFY:
1164 len = sizeof(struct ccb_immed_notify);
1165 break;
1166 case XPT_REL_SIMQ:
1167 len = sizeof(struct ccb_relsim);
1168 break;
1169 case XPT_PATH_INQ:
1170 len = sizeof(struct ccb_pathinq);
1171 break;
1172 case XPT_DEBUG:
1173 len = sizeof(struct ccb_debug);
1174 break;
1175 case XPT_ABORT:
1176 len = sizeof(struct ccb_abort);
1177 break;
1178 case XPT_EN_LUN:
1179 len = sizeof(struct ccb_en_lun);
1180 break;
1181 default:
1182 len = sizeof(union ccb);
1183 break;
1184 }
1185
1186 return (len);
1187}
|