2 * Copyright (c) 2004 Scott Long
3 * Copyright (c) 2005, 2008 Marius Strobl <marius@FreeBSD.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 /* $NetBSD: ncr53c9x.c,v 1.143 2011/07/31 18:39:00 jakllsch Exp $ */
32 * Copyright (c) 1998, 2002 The NetBSD Foundation, Inc.
33 * All rights reserved.
35 * This code is derived from software contributed to The NetBSD Foundation
36 * by Charles M. Hannum.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
47 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
48 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
49 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
50 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
51 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
52 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
53 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
54 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
55 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
56 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
57 * POSSIBILITY OF SUCH DAMAGE.
61 * Copyright (c) 1994 Peter Galbavy
62 * Copyright (c) 1995 Paul Kranenburg
63 * All rights reserved.
65 * Redistribution and use in source and binary forms, with or without
66 * modification, are permitted provided that the following conditions
68 * 1. Redistributions of source code must retain the above copyright
69 * notice, this list of conditions and the following disclaimer.
70 * 2. Redistributions in binary form must reproduce the above copyright
71 * notice, this list of conditions and the following disclaimer in the
72 * documentation and/or other materials provided with the distribution.
73 * 3. All advertising materials mentioning features or use of this software
74 * must display the following acknowledgement:
75 * This product includes software developed by Peter Galbavy
76 * 4. The name of the author may not be used to endorse or promote products
77 * derived from this software without specific prior written permission.
79 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
80 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
81 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
82 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
83 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
84 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
85 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
86 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
87 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
88 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
89 * POSSIBILITY OF SUCH DAMAGE.
93 * Based on aic6360 by Jarle Greipsland
95 * Acknowledgements: Many of the algorithms used in this driver are
96 * inspired by the work of Julian Elischer (julian@FreeBSD.org) and
97 * Charles Hannum (mycroft@duality.gnu.ai.mit.edu). Thanks a million!
100 #include <sys/cdefs.h>
101 __FBSDID("$FreeBSD$");
103 #include <sys/param.h>
104 #include <sys/systm.h>
106 #include <sys/kernel.h>
107 #include <sys/malloc.h>
108 #include <sys/lock.h>
109 #include <sys/module.h>
110 #include <sys/mutex.h>
111 #include <sys/queue.h>
112 #include <sys/time.h>
113 #include <sys/callout.h>
116 #include <cam/cam_ccb.h>
117 #include <cam/cam_debug.h>
118 #include <cam/cam_sim.h>
119 #include <cam/cam_xpt_sim.h>
120 #include <cam/scsi/scsi_all.h>
121 #include <cam/scsi/scsi_message.h>
123 #include <dev/esp/ncr53c9xreg.h>
124 #include <dev/esp/ncr53c9xvar.h>
126 devclass_t esp_devclass;
128 MODULE_DEPEND(esp, cam, 1, 1, 1);
130 #ifdef NCR53C9X_DEBUG
132 NCR_SHOWMISC /* | NCR_SHOWPHASE | NCR_SHOWTRAC | NCR_SHOWCMDS */;
135 static void ncr53c9x_abort(struct ncr53c9x_softc *sc,
136 struct ncr53c9x_ecb *ecb);
137 static void ncr53c9x_action(struct cam_sim *sim, union ccb *ccb);
138 static void ncr53c9x_async(void *cbarg, uint32_t code,
139 struct cam_path *path, void *arg);
140 static void ncr53c9x_callout(void *arg);
141 static void ncr53c9x_clear(struct ncr53c9x_softc *sc, cam_status result);
142 static void ncr53c9x_clear_target(struct ncr53c9x_softc *sc, int target,
144 static void ncr53c9x_dequeue(struct ncr53c9x_softc *sc,
145 struct ncr53c9x_ecb *ecb);
146 static void ncr53c9x_done(struct ncr53c9x_softc *sc,
147 struct ncr53c9x_ecb *ecb);
148 static void ncr53c9x_free_ecb(struct ncr53c9x_softc *sc,
149 struct ncr53c9x_ecb *ecb);
150 static void ncr53c9x_msgin(struct ncr53c9x_softc *sc);
151 static void ncr53c9x_msgout(struct ncr53c9x_softc *sc);
152 static void ncr53c9x_init(struct ncr53c9x_softc *sc, int doreset);
153 static void ncr53c9x_intr1(struct ncr53c9x_softc *sc);
154 static void ncr53c9x_poll(struct cam_sim *sim);
155 static int ncr53c9x_rdfifo(struct ncr53c9x_softc *sc, int how);
156 static int ncr53c9x_reselect(struct ncr53c9x_softc *sc, int message,
157 int tagtype, int tagid);
158 static void ncr53c9x_reset(struct ncr53c9x_softc *sc);
159 static void ncr53c9x_sense(struct ncr53c9x_softc *sc,
160 struct ncr53c9x_ecb *ecb);
161 static void ncr53c9x_sched(struct ncr53c9x_softc *sc);
162 static void ncr53c9x_select(struct ncr53c9x_softc *sc,
163 struct ncr53c9x_ecb *ecb);
164 static void ncr53c9x_watch(void *arg);
165 static void ncr53c9x_wrfifo(struct ncr53c9x_softc *sc, uint8_t *p,
168 static struct ncr53c9x_ecb *ncr53c9x_get_ecb(struct ncr53c9x_softc *sc);
169 static struct ncr53c9x_linfo *ncr53c9x_lunsearch(struct ncr53c9x_tinfo *sc,
172 static inline void ncr53c9x_readregs(struct ncr53c9x_softc *sc);
173 static inline void ncr53c9x_setsync(struct ncr53c9x_softc *sc,
174 struct ncr53c9x_tinfo *ti);
175 static inline int ncr53c9x_stp2cpb(struct ncr53c9x_softc *sc,
178 #define NCR_RDFIFO_START 0
179 #define NCR_RDFIFO_CONTINUE 1
181 #define NCR_SET_COUNT(sc, size) do { \
182 NCR_WRITE_REG((sc), NCR_TCL, (size)); \
183 NCR_WRITE_REG((sc), NCR_TCM, (size) >> 8); \
184 if ((sc->sc_features & NCR_F_LARGEXFER) != 0) \
185 NCR_WRITE_REG((sc), NCR_TCH, (size) >> 16); \
186 if (sc->sc_rev == NCR_VARIANT_FAS366) \
187 NCR_WRITE_REG(sc, NCR_RCH, 0); \
188 } while (/* CONSTCOND */0)
192 (((ms) < 0x20000) ? \
193 ((ms +0u) / 1000u) * hz : \
194 ((ms +0u) * hz) /1000u)
198 * Names for the NCR53c9x variants, corresponding to the variant tags
201 static const char *ncr53c9x_variant_names[] = {
218 * Search linked list for LUN info by LUN id.
220 static struct ncr53c9x_linfo *
221 ncr53c9x_lunsearch(struct ncr53c9x_tinfo *ti, int64_t lun)
223 struct ncr53c9x_linfo *li;
225 LIST_FOREACH(li, &ti->luns, link)
232 * Attach this instance, and then all the sub-devices.
235 ncr53c9x_attach(struct ncr53c9x_softc *sc)
237 struct cam_devq *devq;
239 struct cam_path *path;
240 struct ncr53c9x_ecb *ecb;
243 if (NCR_LOCK_INITIALIZED(sc) == 0) {
244 device_printf(sc->sc_dev, "mutex not initialized\n");
248 callout_init_mtx(&sc->sc_watchdog, &sc->sc_lock, 0);
251 * Note, the front-end has set us up to print the chip variation.
253 if (sc->sc_rev >= NCR_VARIANT_MAX) {
254 device_printf(sc->sc_dev, "unknown variant %d, devices not "
255 "attached\n", sc->sc_rev);
259 device_printf(sc->sc_dev, "%s, %dMHz, SCSI ID %d\n",
260 ncr53c9x_variant_names[sc->sc_rev], sc->sc_freq, sc->sc_id);
262 sc->sc_ntarg = (sc->sc_rev == NCR_VARIANT_FAS366) ? 16 : 8;
265 * Allocate SCSI message buffers.
266 * Front-ends can override allocation to avoid alignment
267 * handling in the DMA engines. Note that ncr53c9x_msgout()
268 * can request a 1 byte DMA transfer.
270 if (sc->sc_omess == NULL) {
271 sc->sc_omess_self = 1;
272 sc->sc_omess = malloc(NCR_MAX_MSG_LEN, M_DEVBUF, M_NOWAIT);
273 if (sc->sc_omess == NULL) {
274 device_printf(sc->sc_dev,
275 "cannot allocate MSGOUT buffer\n");
279 sc->sc_omess_self = 0;
281 if (sc->sc_imess == NULL) {
282 sc->sc_imess_self = 1;
283 sc->sc_imess = malloc(NCR_MAX_MSG_LEN + 1, M_DEVBUF, M_NOWAIT);
284 if (sc->sc_imess == NULL) {
285 device_printf(sc->sc_dev,
286 "cannot allocate MSGIN buffer\n");
291 sc->sc_imess_self = 0;
293 sc->sc_tinfo = malloc(sc->sc_ntarg * sizeof(sc->sc_tinfo[0]),
294 M_DEVBUF, M_NOWAIT | M_ZERO);
295 if (sc->sc_tinfo == NULL) {
296 device_printf(sc->sc_dev,
297 "cannot allocate target info buffer\n");
303 * Treat NCR53C90 with the 86C01 DMA chip exactly as ESP100
306 if (sc->sc_rev == NCR_VARIANT_NCR53C90_86C01)
307 sc->sc_rev = NCR_VARIANT_ESP100;
309 sc->sc_ccf = FREQTOCCF(sc->sc_freq);
311 /* The value *must not* be == 1. Make it 2. */
316 * The recommended timeout is 250ms. This register is loaded
317 * with a value calculated as follows, from the docs:
319 * (timeout period) x (CLK frequency)
320 * reg = -------------------------------------
321 * 8192 x (Clock Conversion Factor)
323 * Since CCF has a linear relation to CLK, this generally computes
324 * to the constant of 153.
326 sc->sc_timeout = ((250 * 1000) * sc->sc_freq) / (8192 * sc->sc_ccf);
328 /* The CCF register only has 3 bits; 0 is actually 8. */
334 devq = cam_simq_alloc(sc->sc_ntarg);
336 device_printf(sc->sc_dev, "cannot allocate device queue\n");
341 sim = cam_sim_alloc(ncr53c9x_action, ncr53c9x_poll, "esp", sc,
342 device_get_unit(sc->sc_dev), &sc->sc_lock, 1, NCR_TAG_DEPTH, devq);
344 device_printf(sc->sc_dev, "cannot allocate SIM entry\n");
351 if (xpt_bus_register(sim, sc->sc_dev, 0) != CAM_SUCCESS) {
352 device_printf(sc->sc_dev, "cannot register bus\n");
357 if (xpt_create_path(&path, NULL, cam_sim_path(sim),
358 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
359 device_printf(sc->sc_dev, "cannot create path\n");
364 if (xpt_register_async(AC_LOST_DEVICE, ncr53c9x_async, sim, path) !=
366 device_printf(sc->sc_dev, "cannot register async handler\n");
374 /* Reset state and bus. */
376 sc->sc_cfflags = sc->sc_dev.dv_cfdata->cf_flags;
381 ncr53c9x_init(sc, 1);
383 TAILQ_INIT(&sc->free_list);
385 malloc(sizeof(struct ncr53c9x_ecb) * NCR_TAG_DEPTH, M_DEVBUF,
386 M_NOWAIT | M_ZERO)) == NULL) {
387 device_printf(sc->sc_dev, "cannot allocate ECB array\n");
391 for (i = 0; i < NCR_TAG_DEPTH; i++) {
392 ecb = &sc->ecb_array[i];
395 callout_init_mtx(&ecb->ch, &sc->sc_lock, 0);
396 TAILQ_INSERT_HEAD(&sc->free_list, ecb, free_links);
399 callout_reset(&sc->sc_watchdog, 60 * hz, ncr53c9x_watch, sc);
406 xpt_register_async(0, ncr53c9x_async, sim, path);
410 xpt_bus_deregister(cam_sim_path(sim));
413 cam_sim_free(sim, TRUE);
417 free(sc->sc_tinfo, M_DEVBUF);
419 if (sc->sc_imess_self)
420 free(sc->sc_imess, M_DEVBUF);
422 if (sc->sc_omess_self)
423 free(sc->sc_omess, M_DEVBUF);
428 ncr53c9x_detach(struct ncr53c9x_softc *sc)
430 struct ncr53c9x_linfo *li, *nextli;
433 callout_drain(&sc->sc_watchdog);
438 /* Cancel all commands. */
439 ncr53c9x_clear(sc, CAM_REQ_ABORTED);
441 /* Free logical units. */
442 for (t = 0; t < sc->sc_ntarg; t++) {
443 for (li = LIST_FIRST(&sc->sc_tinfo[t].luns); li;
445 nextli = LIST_NEXT(li, link);
451 xpt_register_async(0, ncr53c9x_async, sc->sc_sim, sc->sc_path);
452 xpt_free_path(sc->sc_path);
453 xpt_bus_deregister(cam_sim_path(sc->sc_sim));
454 cam_sim_free(sc->sc_sim, TRUE);
458 free(sc->ecb_array, M_DEVBUF);
459 free(sc->sc_tinfo, M_DEVBUF);
460 if (sc->sc_imess_self)
461 free(sc->sc_imess, M_DEVBUF);
462 if (sc->sc_omess_self)
463 free(sc->sc_omess, M_DEVBUF);
469 * This is the generic ncr53c9x reset function. It does not reset the SCSI
470 * bus, only this controller, but kills any on-going commands, and also stops
471 * and resets the DMA.
473 * After reset, registers are loaded with the defaults from the attach
477 ncr53c9x_reset(struct ncr53c9x_softc *sc)
480 NCR_LOCK_ASSERT(sc, MA_OWNED);
482 /* Reset DMA first. */
485 /* Reset SCSI chip. */
486 NCRCMD(sc, NCRCMD_RSTCHIP);
487 NCRCMD(sc, NCRCMD_NOP);
490 /* Do these backwards, and fall through. */
491 switch (sc->sc_rev) {
492 case NCR_VARIANT_ESP406:
493 case NCR_VARIANT_FAS408:
494 NCR_WRITE_REG(sc, NCR_CFG5, sc->sc_cfg5 | NCRCFG5_SINT);
495 NCR_WRITE_REG(sc, NCR_CFG4, sc->sc_cfg4);
497 case NCR_VARIANT_AM53C974:
498 case NCR_VARIANT_FAS100A:
499 case NCR_VARIANT_FAS216:
500 case NCR_VARIANT_FAS236:
501 case NCR_VARIANT_NCR53C94:
502 case NCR_VARIANT_NCR53C96:
503 case NCR_VARIANT_ESP200:
504 sc->sc_features |= NCR_F_HASCFG3;
505 NCR_WRITE_REG(sc, NCR_CFG3, sc->sc_cfg3);
507 case NCR_VARIANT_ESP100A:
508 sc->sc_features |= NCR_F_SELATN3;
509 if ((sc->sc_cfg2 & NCRCFG2_FE) != 0)
510 sc->sc_features |= NCR_F_LARGEXFER;
511 NCR_WRITE_REG(sc, NCR_CFG2, sc->sc_cfg2);
513 case NCR_VARIANT_ESP100:
514 NCR_WRITE_REG(sc, NCR_CFG1, sc->sc_cfg1);
515 NCR_WRITE_REG(sc, NCR_CCF, sc->sc_ccf);
516 NCR_WRITE_REG(sc, NCR_SYNCOFF, 0);
517 NCR_WRITE_REG(sc, NCR_TIMEOUT, sc->sc_timeout);
520 case NCR_VARIANT_FAS366:
521 sc->sc_features |= NCR_F_HASCFG3 | NCR_F_FASTSCSI |
522 NCR_F_SELATN3 | NCR_F_LARGEXFER;
523 sc->sc_cfg3 = NCRFASCFG3_FASTCLK | NCRFASCFG3_OBAUTO;
525 sc->sc_cfg3 |= NCRFASCFG3_IDBIT3;
526 sc->sc_cfg3_fscsi = NCRFASCFG3_FASTSCSI;
527 NCR_WRITE_REG(sc, NCR_CFG3, sc->sc_cfg3);
528 sc->sc_cfg2 = NCRCFG2_HMEFE | NCRCFG2_HME32;
529 NCR_WRITE_REG(sc, NCR_CFG2, sc->sc_cfg2);
530 NCR_WRITE_REG(sc, NCR_CFG1, sc->sc_cfg1);
531 NCR_WRITE_REG(sc, NCR_CCF, sc->sc_ccf);
532 NCR_WRITE_REG(sc, NCR_SYNCOFF, 0);
533 NCR_WRITE_REG(sc, NCR_TIMEOUT, sc->sc_timeout);
537 device_printf(sc->sc_dev,
538 "unknown revision code, assuming ESP100\n");
539 NCR_WRITE_REG(sc, NCR_CFG1, sc->sc_cfg1);
540 NCR_WRITE_REG(sc, NCR_CCF, sc->sc_ccf);
541 NCR_WRITE_REG(sc, NCR_SYNCOFF, 0);
542 NCR_WRITE_REG(sc, NCR_TIMEOUT, sc->sc_timeout);
545 if (sc->sc_rev == NCR_VARIANT_AM53C974)
546 NCR_WRITE_REG(sc, NCR_AMDCFG4, sc->sc_cfg4);
549 device_printf(sc->sc_dev, "%s: revision %d\n", __func__, sc->sc_rev);
550 device_printf(sc->sc_dev, "%s: cfg1 0x%x, cfg2 0x%x, cfg3 0x%x, ccf "
551 "0x%x, timeout 0x%x\n", __func__, sc->sc_cfg1, sc->sc_cfg2,
552 sc->sc_cfg3, sc->sc_ccf, sc->sc_timeout);
557 * Clear all commands.
560 ncr53c9x_clear(struct ncr53c9x_softc *sc, cam_status result)
562 struct ncr53c9x_ecb *ecb;
565 NCR_LOCK_ASSERT(sc, MA_OWNED);
567 /* Cancel any active commands. */
568 sc->sc_state = NCR_CLEANING;
572 ecb->ccb->ccb_h.status = result;
573 ncr53c9x_done(sc, ecb);
575 /* Cancel outstanding disconnected commands. */
576 for (r = 0; r < sc->sc_ntarg; r++)
577 ncr53c9x_clear_target(sc, r, result);
581 * Clear all commands for a specific target.
584 ncr53c9x_clear_target(struct ncr53c9x_softc *sc, int target,
587 struct ncr53c9x_ecb *ecb;
588 struct ncr53c9x_linfo *li;
591 NCR_LOCK_ASSERT(sc, MA_OWNED);
593 /* Cancel outstanding disconnected commands on each LUN. */
594 LIST_FOREACH(li, &sc->sc_tinfo[target].luns, link) {
599 * XXX should we terminate a command
600 * that never reached the disk?
603 ecb->ccb->ccb_h.status = result;
604 ncr53c9x_done(sc, ecb);
606 for (i = 0; i < NCR_TAG_DEPTH; i++) {
609 li->queued[i] = NULL;
610 ecb->ccb->ccb_h.status = result;
611 ncr53c9x_done(sc, ecb);
619 * Initialize ncr53c9x state machine.
622 ncr53c9x_init(struct ncr53c9x_softc *sc, int doreset)
624 struct ncr53c9x_tinfo *ti;
627 NCR_LOCK_ASSERT(sc, MA_OWNED);
629 NCR_MISC(("[NCR_INIT(%d) %d] ", doreset, sc->sc_state));
631 if (sc->sc_state == 0) {
632 /* First time through; initialize. */
634 TAILQ_INIT(&sc->ready_list);
636 memset(sc->sc_tinfo, 0, sizeof(*sc->sc_tinfo));
637 for (r = 0; r < sc->sc_ntarg; r++) {
638 LIST_INIT(&sc->sc_tinfo[r].luns);
641 ncr53c9x_clear(sc, CAM_CMD_TIMEOUT);
644 * Reset the chip to a known state.
649 sc->sc_msgpriq = sc->sc_msgout = sc->sc_msgoutq = 0;
650 sc->sc_phase = sc->sc_prevphase = INVALID_PHASE;
653 * If we're the first time through, set the default parameters
654 * for all targets. Otherwise we only clear their current transfer
655 * settings so we'll renegotiate their goal settings with the next
658 if (sc->sc_state == 0) {
659 for (r = 0; r < sc->sc_ntarg; r++) {
660 ti = &sc->sc_tinfo[r];
661 /* XXX - config flags per target: low bits: no reselect; high bits: no synch */
663 ti->flags = ((sc->sc_minsync != 0 &&
664 (sc->sc_cfflags & (1 << ((r & 7) + 8))) == 0) ?
666 ((sc->sc_cfflags & (1 << (r & 7))) == 0 ?
668 ti->curr.period = ti->goal.period = 0;
669 ti->curr.offset = ti->goal.offset = 0;
670 ti->curr.width = ti->goal.width =
671 MSG_EXT_WDTR_BUS_8_BIT;
674 for (r = 0; r < sc->sc_ntarg; r++) {
675 ti = &sc->sc_tinfo[r];
676 ti->flags &= ~(T_SDTRSENT | T_WDTRSENT);
679 ti->curr.width = MSG_EXT_WDTR_BUS_8_BIT;
684 sc->sc_state = NCR_SBR;
685 NCRCMD(sc, NCRCMD_RSTSCSI);
686 /* Give the bus a fighting chance to settle. */
689 sc->sc_state = NCR_IDLE;
695 * Read the NCR registers, and save their contents for later use.
696 * NCR_STAT, NCR_STEP & NCR_INTR are mostly zeroed out when reading
697 * NCR_INTR - so make sure it is the last read.
699 * I think that (from reading the docs) most bits in these registers
700 * only make sense when the DMA CSR has an interrupt showing. Call only
701 * if an interrupt is pending.
704 ncr53c9x_readregs(struct ncr53c9x_softc *sc)
707 NCR_LOCK_ASSERT(sc, MA_OWNED);
709 sc->sc_espstat = NCR_READ_REG(sc, NCR_STAT);
710 /* Only the step bits are of interest. */
711 sc->sc_espstep = NCR_READ_REG(sc, NCR_STEP) & NCRSTEP_MASK;
713 if (sc->sc_rev == NCR_VARIANT_FAS366)
714 sc->sc_espstat2 = NCR_READ_REG(sc, NCR_STAT2);
716 sc->sc_espintr = NCR_READ_REG(sc, NCR_INTR);
719 * Determine the SCSI bus phase, return either a real SCSI bus phase
720 * or some pseudo phase we use to detect certain exceptions.
722 sc->sc_phase = (sc->sc_espintr & NCRINTR_DIS) ?
723 BUSFREE_PHASE : sc->sc_espstat & NCRSTAT_PHASE;
725 NCR_INTS(("regs[intr=%02x,stat=%02x,step=%02x,stat2=%02x] ",
726 sc->sc_espintr, sc->sc_espstat, sc->sc_espstep, sc->sc_espstat2));
730 * Convert Synchronous Transfer Period to chip register Clock Per Byte value.
733 ncr53c9x_stp2cpb(struct ncr53c9x_softc *sc, int period)
737 NCR_LOCK_ASSERT(sc, MA_OWNED);
739 v = (sc->sc_freq * period) / 250;
740 if (ncr53c9x_cpb2stp(sc, v) < period)
741 /* Correct round-down error. */
747 ncr53c9x_setsync(struct ncr53c9x_softc *sc, struct ncr53c9x_tinfo *ti)
749 uint8_t cfg3, syncoff, synctp;
751 NCR_LOCK_ASSERT(sc, MA_OWNED);
754 if (ti->curr.offset != 0) {
755 syncoff = ti->curr.offset;
756 synctp = ncr53c9x_stp2cpb(sc, ti->curr.period);
757 if (sc->sc_features & NCR_F_FASTSCSI) {
759 * If the period is 200ns or less (ti->period <= 50),
760 * put the chip in Fast SCSI mode.
762 if (ti->curr.period <= 50)
764 * There are (at least) 4 variations of the
765 * configuration 3 register. The drive attach
766 * routine sets the appropriate bit to put the
767 * chip into Fast SCSI mode so that it doesn't
768 * have to be figured out here each time.
770 cfg3 |= sc->sc_cfg3_fscsi;
774 * Am53c974 requires different SYNCTP values when the
777 if (sc->sc_rev == NCR_VARIANT_AM53C974 &&
778 (cfg3 & NCRAMDCFG3_FSCSI) == 0)
785 if (ti->curr.width != MSG_EXT_WDTR_BUS_8_BIT) {
786 if (sc->sc_rev == NCR_VARIANT_FAS366)
787 cfg3 |= NCRFASCFG3_EWIDE;
790 if (sc->sc_features & NCR_F_HASCFG3)
791 NCR_WRITE_REG(sc, NCR_CFG3, cfg3);
793 NCR_WRITE_REG(sc, NCR_SYNCOFF, syncoff);
794 NCR_WRITE_REG(sc, NCR_SYNCTP, synctp);
798 * Send a command to a target, set the driver state to NCR_SELECTING
799 * and let the caller take care of the rest.
801 * Keeping this as a function allows me to say that this may be done
802 * by DMA instead of programmed I/O soon.
805 ncr53c9x_select(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb)
807 struct ncr53c9x_tinfo *ti;
810 int clen, error, selatn3, selatns;
811 int lun = ecb->ccb->ccb_h.target_lun;
812 int target = ecb->ccb->ccb_h.target_id;
814 NCR_LOCK_ASSERT(sc, MA_OWNED);
816 NCR_TRACE(("[%s(t%d,l%d,cmd:%x,tag:%x,%x)] ", __func__, target, lun,
817 ecb->cmd.cmd.opcode, ecb->tag[0], ecb->tag[1]));
819 ti = &sc->sc_tinfo[target];
820 sc->sc_state = NCR_SELECTING;
822 * Schedule the callout now, the first time we will go away
823 * expecting to come back due to an interrupt, because it is
824 * always possible that the interrupt may never happen.
826 callout_reset(&ecb->ch, mstohz(ecb->timeout), ncr53c9x_callout, ecb);
829 * The docs say the target register is never reset, and I
830 * can't think of a better place to set it.
832 if (sc->sc_rev == NCR_VARIANT_FAS366) {
833 NCRCMD(sc, NCRCMD_FLUSH);
834 NCR_WRITE_REG(sc, NCR_SELID, target | NCR_BUSID_HMEXC32 |
837 NCR_WRITE_REG(sc, NCR_SELID, target);
840 * If we are requesting sense, force a renegotiation if we are
841 * currently using anything different from asynchronous at 8 bit
842 * as the target might have lost our transfer negotiations.
844 if ((ecb->flags & ECB_SENSE) != 0 && (ti->curr.offset != 0 ||
845 ti->curr.width != MSG_EXT_WDTR_BUS_8_BIT)) {
848 ti->curr.width = MSG_EXT_WDTR_BUS_8_BIT;
850 ncr53c9x_setsync(sc, ti);
852 selatn3 = selatns = 0;
853 if (ecb->tag[0] != 0) {
854 if (sc->sc_features & NCR_F_SELATN3)
855 /* Use SELATN3 to send tag messages. */
858 /* We don't have SELATN3; use SELATNS to send tags. */
862 if (ti->curr.period != ti->goal.period ||
863 ti->curr.offset != ti->goal.offset ||
864 ti->curr.width != ti->goal.width) {
865 /* We have to use SELATNS to send sync/wide messages. */
870 cmd = (uint8_t *)&ecb->cmd.cmd;
873 /* We'll use tags with SELATN3. */
874 clen = ecb->clen + 3;
876 cmd[0] = MSG_IDENTIFY(lun, 1); /* msg[0] */
877 cmd[1] = ecb->tag[0]; /* msg[1] */
878 cmd[2] = ecb->tag[1]; /* msg[2] */
880 /* We don't have tags, or will send messages with SELATNS. */
881 clen = ecb->clen + 1;
883 cmd[0] = MSG_IDENTIFY(lun, (ti->flags & T_RSELECTOFF) == 0);
886 if ((sc->sc_features & NCR_F_DMASELECT) && !selatns) {
887 /* Setup DMA transfer for command. */
889 sc->sc_cmdlen = clen;
891 error = NCRDMA_SETUP(sc, &sc->sc_cmdp, &sc->sc_cmdlen, 0,
899 /* Program the SCSI counter. */
900 NCR_SET_COUNT(sc, dmasize);
902 /* Load the count in. */
903 NCRCMD(sc, NCRCMD_NOP | NCRCMD_DMA);
905 /* And get the target's attention. */
907 sc->sc_msgout = SEND_TAG;
908 sc->sc_flags |= NCR_ATN;
909 NCRCMD(sc, NCRCMD_SELATN3 | NCRCMD_DMA);
911 NCRCMD(sc, NCRCMD_SELATN | NCRCMD_DMA);
918 * Who am I? This is where we tell the target that we are
919 * happy for it to disconnect etc.
922 /* Now get the command into the FIFO. */
923 ncr53c9x_wrfifo(sc, cmd, clen);
925 /* And get the target's attention. */
927 NCR_MSGS(("SELATNS \n"));
928 /* Arbitrate, select and stop after IDENTIFY message. */
929 NCRCMD(sc, NCRCMD_SELATNS);
930 } else if (selatn3) {
931 sc->sc_msgout = SEND_TAG;
932 sc->sc_flags |= NCR_ATN;
933 NCRCMD(sc, NCRCMD_SELATN3);
935 NCRCMD(sc, NCRCMD_SELATN);
939 ncr53c9x_free_ecb(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb)
942 NCR_LOCK_ASSERT(sc, MA_OWNED);
945 TAILQ_INSERT_TAIL(&sc->free_list, ecb, free_links);
948 static struct ncr53c9x_ecb *
949 ncr53c9x_get_ecb(struct ncr53c9x_softc *sc)
951 struct ncr53c9x_ecb *ecb;
953 NCR_LOCK_ASSERT(sc, MA_OWNED);
955 ecb = TAILQ_FIRST(&sc->free_list);
958 panic("%s: ecb flags not cleared", __func__);
959 TAILQ_REMOVE(&sc->free_list, ecb, free_links);
960 ecb->flags = ECB_ALLOC;
961 bzero(&ecb->ccb, sizeof(struct ncr53c9x_ecb) -
962 offsetof(struct ncr53c9x_ecb, ccb));
968 * DRIVER FUNCTIONS CALLABLE FROM HIGHER LEVEL DRIVERS:
972 * Start a SCSI-command.
973 * This function is called by the higher level SCSI-driver to queue/run
978 ncr53c9x_action(struct cam_sim *sim, union ccb *ccb)
980 struct ccb_pathinq *cpi;
981 struct ccb_scsiio *csio;
982 struct ccb_trans_settings *cts;
983 struct ccb_trans_settings_scsi *scsi;
984 struct ccb_trans_settings_spi *spi;
985 struct ncr53c9x_ecb *ecb;
986 struct ncr53c9x_softc *sc;
987 struct ncr53c9x_tinfo *ti;
990 sc = cam_sim_softc(sim);
992 NCR_LOCK_ASSERT(sc, MA_OWNED);
994 NCR_TRACE(("[%s %d]", __func__, ccb->ccb_h.func_code));
996 switch (ccb->ccb_h.func_code) {
998 ncr53c9x_init(sc, 1);
999 ccb->ccb_h.status = CAM_REQ_CMP;
1002 case XPT_CALC_GEOMETRY:
1003 cam_calc_geometry(&ccb->ccg, sc->sc_extended_geom);
1008 cpi->version_num = 1;
1009 cpi->hba_inquiry = PI_SDTR_ABLE | PI_TAG_ABLE;
1011 (sc->sc_rev == NCR_VARIANT_FAS366) ? PI_WIDE_16 : 0;
1012 cpi->target_sprt = 0;
1014 cpi->hba_eng_cnt = 0;
1015 cpi->max_target = sc->sc_ntarg - 1;
1017 cpi->initiator_id = sc->sc_id;
1018 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
1019 strncpy(cpi->hba_vid, "NCR", HBA_IDLEN);
1020 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
1021 cpi->unit_number = cam_sim_unit(sim);
1023 cpi->base_transfer_speed = 3300;
1024 cpi->protocol = PROTO_SCSI;
1025 cpi->protocol_version = SCSI_REV_2;
1026 cpi->transport = XPORT_SPI;
1027 cpi->transport_version = 2;
1028 cpi->maxio = sc->sc_maxxfer;
1029 ccb->ccb_h.status = CAM_REQ_CMP;
1032 case XPT_GET_TRAN_SETTINGS:
1034 ti = &sc->sc_tinfo[ccb->ccb_h.target_id];
1035 scsi = &cts->proto_specific.scsi;
1036 spi = &cts->xport_specific.spi;
1038 cts->protocol = PROTO_SCSI;
1039 cts->protocol_version = SCSI_REV_2;
1040 cts->transport = XPORT_SPI;
1041 cts->transport_version = 2;
1043 if (cts->type == CTS_TYPE_CURRENT_SETTINGS) {
1044 spi->sync_period = ti->curr.period;
1045 spi->sync_offset = ti->curr.offset;
1046 spi->bus_width = ti->curr.width;
1047 if ((ti->flags & T_TAG) != 0) {
1048 spi->flags |= CTS_SPI_FLAGS_DISC_ENB;
1049 scsi->flags |= CTS_SCSI_FLAGS_TAG_ENB;
1051 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
1052 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
1055 if ((ti->flags & T_SYNCHOFF) != 0) {
1056 spi->sync_period = 0;
1057 spi->sync_offset = 0;
1059 spi->sync_period = sc->sc_minsync;
1060 spi->sync_offset = sc->sc_maxoffset;
1062 spi->bus_width = sc->sc_maxwidth;
1063 spi->flags |= CTS_SPI_FLAGS_DISC_ENB;
1064 scsi->flags |= CTS_SCSI_FLAGS_TAG_ENB;
1067 CTS_SPI_VALID_BUS_WIDTH |
1068 CTS_SPI_VALID_SYNC_RATE |
1069 CTS_SPI_VALID_SYNC_OFFSET |
1071 scsi->valid = CTS_SCSI_VALID_TQ;
1072 ccb->ccb_h.status = CAM_REQ_CMP;
1076 device_printf(sc->sc_dev, "XPT_ABORT called\n");
1077 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
1081 device_printf(sc->sc_dev, "XPT_TERM_IO called\n");
1082 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
1087 if (ccb->ccb_h.target_id < 0 ||
1088 ccb->ccb_h.target_id >= sc->sc_ntarg) {
1089 ccb->ccb_h.status = CAM_PATH_INVALID;
1092 /* Get an ECB to use. */
1093 ecb = ncr53c9x_get_ecb(sc);
1095 * This should never happen as we track resources
1099 xpt_freeze_simq(sim, 1);
1100 ccb->ccb_h.status = CAM_REQUEUE_REQ;
1101 device_printf(sc->sc_dev, "unable to allocate ecb\n");
1105 /* Initialize ecb. */
1107 ecb->timeout = ccb->ccb_h.timeout;
1109 if (ccb->ccb_h.func_code == XPT_RESET_DEV) {
1110 ecb->flags |= ECB_RESET;
1115 if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0)
1116 bcopy(csio->cdb_io.cdb_ptr, &ecb->cmd.cmd,
1119 bcopy(csio->cdb_io.cdb_bytes, &ecb->cmd.cmd,
1121 ecb->clen = csio->cdb_len;
1122 ecb->daddr = csio->data_ptr;
1123 ecb->dleft = csio->dxfer_len;
1127 TAILQ_INSERT_TAIL(&sc->ready_list, ecb, chain);
1128 ecb->flags |= ECB_READY;
1129 if (sc->sc_state == NCR_IDLE)
1133 case XPT_SET_TRAN_SETTINGS:
1135 target = ccb->ccb_h.target_id;
1136 ti = &sc->sc_tinfo[target];
1137 scsi = &cts->proto_specific.scsi;
1138 spi = &cts->xport_specific.spi;
1140 if ((scsi->valid & CTS_SCSI_VALID_TQ) != 0) {
1141 if ((sc->sc_cfflags & (1<<((target & 7) + 16))) == 0 &&
1142 (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB)) {
1143 NCR_MISC(("%s: target %d: tagged queuing\n",
1144 device_get_nameunit(sc->sc_dev), target));
1147 ti->flags &= ~T_TAG;
1150 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0) {
1151 NCR_MISC(("%s: target %d: wide negotiation\n",
1152 device_get_nameunit(sc->sc_dev), target));
1153 ti->goal.width = spi->bus_width;
1156 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) != 0) {
1157 NCR_MISC(("%s: target %d: sync period negotiation\n",
1158 device_get_nameunit(sc->sc_dev), target));
1159 ti->goal.period = spi->sync_period;
1162 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0) {
1163 NCR_MISC(("%s: target %d: sync offset negotiation\n",
1164 device_get_nameunit(sc->sc_dev), target));
1165 ti->goal.offset = spi->sync_offset;
1168 ccb->ccb_h.status = CAM_REQ_CMP;
1172 device_printf(sc->sc_dev, "Unhandled function code %d\n",
1173 ccb->ccb_h.func_code);
1174 ccb->ccb_h.status = CAM_PROVIDE_FAIL;
1182 * Used when interrupt driven I/O is not allowed, e.g. during boot.
1185 ncr53c9x_poll(struct cam_sim *sim)
1187 struct ncr53c9x_softc *sc;
1189 sc = cam_sim_softc(sim);
1191 NCR_LOCK_ASSERT(sc, MA_OWNED);
1193 NCR_TRACE(("[%s] ", __func__));
1195 if (NCRDMA_ISINTR(sc))
1200 * Asynchronous notification handler
1203 ncr53c9x_async(void *cbarg, uint32_t code, struct cam_path *path, void *arg)
1205 struct ncr53c9x_softc *sc;
1206 struct ncr53c9x_tinfo *ti;
1209 sc = cam_sim_softc(cbarg);
1211 NCR_LOCK_ASSERT(sc, MA_OWNED);
1214 case AC_LOST_DEVICE:
1215 target = xpt_path_target_id(path);
1216 if (target < 0 || target >= sc->sc_ntarg)
1219 /* Cancel outstanding disconnected commands. */
1220 ncr53c9x_clear_target(sc, target, CAM_REQ_ABORTED);
1222 /* Set the default parameters for the target. */
1223 ti = &sc->sc_tinfo[target];
1224 /* XXX - config flags per target: low bits: no reselect; high bits: no synch */
1225 ti->flags = ((sc->sc_minsync != 0 &&
1226 (sc->sc_cfflags & (1 << ((target & 7) + 8))) == 0) ?
1228 ((sc->sc_cfflags & (1 << (target & 7))) == 0 ?
1230 ti->curr.period = ti->goal.period = 0;
1231 ti->curr.offset = ti->goal.offset = 0;
1232 ti->curr.width = ti->goal.width = MSG_EXT_WDTR_BUS_8_BIT;
1238 * LOW LEVEL SCSI UTILITIES
1242 * Schedule a SCSI operation. This has now been pulled out of the interrupt
1243 * handler so that we may call it from ncr53c9x_action and ncr53c9x_done.
1244 * This may save us an unnecessary interrupt just to get things going.
1245 * Should only be called when state == NCR_IDLE and with sc_lock held.
1248 ncr53c9x_sched(struct ncr53c9x_softc *sc)
1250 struct ncr53c9x_ecb *ecb;
1251 struct ncr53c9x_linfo *li;
1252 struct ncr53c9x_tinfo *ti;
1255 NCR_LOCK_ASSERT(sc, MA_OWNED);
1257 NCR_TRACE(("[%s] ", __func__));
1259 if (sc->sc_state != NCR_IDLE)
1260 panic("%s: not IDLE (state=%d)", __func__, sc->sc_state);
1263 * Find first ecb in ready queue that is for a target/lunit
1264 * combinations that is not busy.
1266 TAILQ_FOREACH(ecb, &sc->ready_list, chain) {
1267 ti = &sc->sc_tinfo[ecb->ccb->ccb_h.target_id];
1268 lun = ecb->ccb->ccb_h.target_lun;
1270 /* Select type of tag for this command */
1271 if ((ti->flags & (T_RSELECTOFF | T_TAG)) != T_TAG)
1273 else if ((ecb->flags & ECB_SENSE) != 0)
1275 else if ((ecb->ccb->ccb_h.flags & CAM_TAG_ACTION_VALID) == 0)
1277 else if (ecb->ccb->csio.tag_action == CAM_TAG_ACTION_NONE)
1280 tag = ecb->ccb->csio.tag_action;
1282 li = TINFO_LUN(ti, lun);
1284 /* Initialize LUN info and add to list. */
1285 li = malloc(sizeof(*li), M_DEVBUF, M_NOWAIT | M_ZERO);
1290 LIST_INSERT_HEAD(&ti->luns, li, link);
1294 li->last_used = time_second;
1296 /* Try to issue this as an untagged command. */
1297 if (li->untagged == NULL)
1300 if (li->untagged != NULL) {
1302 if ((li->busy != 1) && li->used == 0) {
1304 * We need to issue this untagged command
1309 /* not ready, yet */
1315 li->queued[ecb->tag_id] = ecb;
1316 ecb->tag[1] = ecb->tag_id;
1319 if (li->untagged != NULL && (li->busy != 1)) {
1321 TAILQ_REMOVE(&sc->ready_list, ecb, chain);
1322 ecb->flags &= ~ECB_READY;
1324 ncr53c9x_select(sc, ecb);
1327 if (li->untagged == NULL && tag != 0) {
1328 TAILQ_REMOVE(&sc->ready_list, ecb, chain);
1329 ecb->flags &= ~ECB_READY;
1331 ncr53c9x_select(sc, ecb);
1334 NCR_TRACE(("[%s %d:%d busy] \n", __func__,
1335 ecb->ccb->ccb_h.target_id,
1336 ecb->ccb->ccb_h.target_lun));
1341 ncr53c9x_sense(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb)
1343 union ccb *ccb = ecb->ccb;
1344 struct ncr53c9x_linfo *li;
1345 struct ncr53c9x_tinfo *ti;
1346 struct scsi_request_sense *ss = (void *)&ecb->cmd.cmd;
1349 NCR_LOCK_ASSERT(sc, MA_OWNED);
1351 NCR_TRACE(("[%s] ", __func__));
1353 lun = ccb->ccb_h.target_lun;
1354 ti = &sc->sc_tinfo[ccb->ccb_h.target_id];
1356 /* Next, setup a REQUEST SENSE command block. */
1357 memset(ss, 0, sizeof(*ss));
1358 ss->opcode = REQUEST_SENSE;
1359 ss->byte2 = ccb->ccb_h.target_lun << SCSI_CMD_LUN_SHIFT;
1360 ss->length = sizeof(struct scsi_sense_data);
1361 ecb->clen = sizeof(*ss);
1362 memset(&ccb->csio.sense_data, 0, sizeof(ccb->csio.sense_data));
1363 ecb->daddr = (uint8_t *)&ccb->csio.sense_data;
1364 ecb->dleft = sizeof(struct scsi_sense_data);
1365 ecb->flags |= ECB_SENSE;
1366 ecb->timeout = NCR_SENSE_TIMEOUT;
1368 li = TINFO_LUN(ti, lun);
1371 ncr53c9x_dequeue(sc, ecb);
1372 li->untagged = ecb; /* Must be executed first to fix C/A. */
1374 if (ecb == sc->sc_nexus)
1375 ncr53c9x_select(sc, ecb);
1377 TAILQ_INSERT_HEAD(&sc->ready_list, ecb, chain);
1378 ecb->flags |= ECB_READY;
1379 if (sc->sc_state == NCR_IDLE)
1385 * POST PROCESSING OF SCSI_CMD (usually current)
1388 ncr53c9x_done(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb)
1390 union ccb *ccb = ecb->ccb;
1391 struct ncr53c9x_linfo *li;
1392 struct ncr53c9x_tinfo *ti;
1393 int lun, sense_returned;
1395 NCR_LOCK_ASSERT(sc, MA_OWNED);
1397 NCR_TRACE(("[%s(status:%x)] ", __func__, ccb->ccb_h.status));
1399 ti = &sc->sc_tinfo[ccb->ccb_h.target_id];
1400 lun = ccb->ccb_h.target_lun;
1401 li = TINFO_LUN(ti, lun);
1403 callout_stop(&ecb->ch);
1406 * Now, if we've come here with no error code, i.e. we've kept the
1407 * initial CAM_REQ_CMP, and the status code signals that we should
1408 * check sense, we'll need to set up a request sense cmd block and
1409 * push the command back into the ready queue *before* any other
1410 * commands for this target/lunit, else we lose the sense info.
1411 * We don't support chk sense conditions for the request sense cmd.
1413 if (ccb->ccb_h.status == CAM_REQ_CMP) {
1414 ccb->csio.scsi_status = ecb->stat;
1415 if ((ecb->flags & ECB_ABORT) != 0)
1416 ccb->ccb_h.status = CAM_CMD_TIMEOUT;
1417 else if ((ecb->flags & ECB_SENSE) != 0 &&
1418 (ecb->stat != SCSI_STATUS_CHECK_COND)) {
1419 ccb->csio.scsi_status = SCSI_STATUS_CHECK_COND;
1420 ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR |
1422 sense_returned = sizeof(ccb->csio.sense_data) -
1424 if (sense_returned < ccb->csio.sense_len)
1425 ccb->csio.sense_resid = ccb->csio.sense_len -
1428 ccb->csio.sense_resid = 0;
1429 } else if (ecb->stat == SCSI_STATUS_CHECK_COND) {
1430 if ((ecb->flags & ECB_SENSE) != 0)
1431 ccb->ccb_h.status = CAM_AUTOSENSE_FAIL;
1433 /* First, save the return values. */
1434 ccb->csio.resid = ecb->dleft;
1435 if ((ccb->ccb_h.flags & CAM_DIS_AUTOSENSE) ==
1437 ncr53c9x_sense(sc, ecb);
1440 ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR;
1443 ccb->csio.resid = ecb->dleft;
1444 if (ecb->stat == SCSI_STATUS_QUEUE_FULL)
1445 ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR;
1446 else if (ecb->stat == SCSI_STATUS_BUSY)
1447 ccb->ccb_h.status = CAM_SCSI_BUSY;
1448 } else if ((ccb->ccb_h.status & CAM_DEV_QFRZN) == 0) {
1449 ccb->ccb_h.status |= CAM_DEV_QFRZN;
1450 xpt_freeze_devq(ccb->ccb_h.path, 1);
1453 #ifdef NCR53C9X_DEBUG
1454 if ((ncr53c9x_debug & NCR_SHOWTRAC) != 0) {
1455 if (ccb->csio.resid != 0)
1456 printf("resid=%d ", ccb->csio.resid);
1457 if ((ccb->ccb_h.status & CAM_AUTOSNS_VALID) != 0)
1458 printf("sense=0x%02x\n",
1459 ccb->csio.sense_data.error_code);
1461 printf("status SCSI=0x%x CAM=0x%x\n",
1462 ccb->csio.scsi_status, ccb->ccb_h.status);
1467 * Remove the ECB from whatever queue it's on.
1469 ncr53c9x_dequeue(sc, ecb);
1470 if (ecb == sc->sc_nexus) {
1471 sc->sc_nexus = NULL;
1472 if (sc->sc_state != NCR_CLEANING) {
1473 sc->sc_state = NCR_IDLE;
1478 if ((ccb->ccb_h.status & CAM_SEL_TIMEOUT) != 0) {
1479 /* Selection timeout -- discard this LUN if empty. */
1480 if (li->untagged == NULL && li->used == 0) {
1482 ti->lun[lun] = NULL;
1483 LIST_REMOVE(li, link);
1488 ncr53c9x_free_ecb(sc, ecb);
1494 ncr53c9x_dequeue(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb)
1496 struct ncr53c9x_linfo *li;
1497 struct ncr53c9x_tinfo *ti;
1500 NCR_LOCK_ASSERT(sc, MA_OWNED);
1502 ti = &sc->sc_tinfo[ecb->ccb->ccb_h.target_id];
1503 lun = ecb->ccb->ccb_h.target_lun;
1504 li = TINFO_LUN(ti, lun);
1506 if (li == NULL || li->lun != lun)
1507 panic("%s: lun %llx for ecb %p does not exist", __func__,
1508 (long long)lun, ecb);
1510 if (li->untagged == ecb) {
1512 li->untagged = NULL;
1514 if (ecb->tag[0] && li->queued[ecb->tag[1]] != NULL) {
1516 if (li->queued[ecb->tag[1]] != NULL &&
1517 (li->queued[ecb->tag[1]] != ecb))
1518 panic("%s: slot %d for lun %llx has %p instead of ecb "
1519 "%p", __func__, ecb->tag[1], (long long)lun,
1520 li->queued[ecb->tag[1]], ecb);
1522 li->queued[ecb->tag[1]] = NULL;
1525 ecb->tag[0] = ecb->tag[1] = 0;
1527 if ((ecb->flags & ECB_READY) != 0) {
1528 ecb->flags &= ~ECB_READY;
1529 TAILQ_REMOVE(&sc->ready_list, ecb, chain);
1534 * INTERRUPT/PROTOCOL ENGINE
1538 * Schedule an outgoing message by prioritizing it, and asserting
1539 * attention on the bus. We can only do this when we are the initiator
1540 * else there will be an illegal command interrupt.
1542 #define ncr53c9x_sched_msgout(m) do { \
1543 NCR_MSGS(("ncr53c9x_sched_msgout %x %d", m, __LINE__)); \
1544 NCRCMD(sc, NCRCMD_SETATN); \
1545 sc->sc_flags |= NCR_ATN; \
1546 sc->sc_msgpriq |= (m); \
1547 } while (/* CONSTCOND */0)
1550 ncr53c9x_flushfifo(struct ncr53c9x_softc *sc)
1553 NCR_LOCK_ASSERT(sc, MA_OWNED);
1555 NCR_TRACE(("[%s] ", __func__));
1557 NCRCMD(sc, NCRCMD_FLUSH);
1559 if (sc->sc_phase == COMMAND_PHASE ||
1560 sc->sc_phase == MESSAGE_OUT_PHASE)
1565 ncr53c9x_rdfifo(struct ncr53c9x_softc *sc, int how)
1570 NCR_LOCK_ASSERT(sc, MA_OWNED);
1573 case NCR_RDFIFO_START:
1574 ibuf = sc->sc_imess;
1578 case NCR_RDFIFO_CONTINUE:
1579 ibuf = sc->sc_imess + sc->sc_imlen;
1583 panic("%s: bad flag", __func__);
1588 * XXX buffer (sc_imess) size for message
1591 n = NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF;
1593 if (sc->sc_rev == NCR_VARIANT_FAS366) {
1596 for (i = 0; i < n; i++)
1597 ibuf[i] = NCR_READ_REG(sc, NCR_FIFO);
1599 if (sc->sc_espstat2 & NCRFAS_STAT2_ISHUTTLE) {
1601 NCR_WRITE_REG(sc, NCR_FIFO, 0);
1602 ibuf[i++] = NCR_READ_REG(sc, NCR_FIFO);
1604 NCR_READ_REG(sc, NCR_FIFO);
1606 ncr53c9x_flushfifo(sc);
1609 for (i = 0; i < n; i++)
1610 ibuf[i] = NCR_READ_REG(sc, NCR_FIFO);
1615 #ifdef NCR53C9X_DEBUG
1616 NCR_TRACE(("\n[rdfifo %s (%d):",
1617 (how == NCR_RDFIFO_START) ? "start" : "cont", (int)sc->sc_imlen));
1618 if ((ncr53c9x_debug & NCR_SHOWTRAC) != 0) {
1619 for (i = 0; i < sc->sc_imlen; i++)
1620 printf(" %02x", sc->sc_imess[i]);
1625 return (sc->sc_imlen);
1629 ncr53c9x_wrfifo(struct ncr53c9x_softc *sc, uint8_t *p, int len)
1633 NCR_LOCK_ASSERT(sc, MA_OWNED);
1635 #ifdef NCR53C9X_DEBUG
1636 NCR_MSGS(("[wrfifo(%d):", len));
1637 if ((ncr53c9x_debug & NCR_SHOWMSGS) != 0) {
1638 for (i = 0; i < len; i++)
1639 printf(" %02x", p[i]);
1644 for (i = 0; i < len; i++) {
1645 NCR_WRITE_REG(sc, NCR_FIFO, p[i]);
1647 if (sc->sc_rev == NCR_VARIANT_FAS366)
1648 NCR_WRITE_REG(sc, NCR_FIFO, 0);
1653 ncr53c9x_reselect(struct ncr53c9x_softc *sc, int message, int tagtype,
1656 struct ncr53c9x_ecb *ecb = NULL;
1657 struct ncr53c9x_linfo *li;
1658 struct ncr53c9x_tinfo *ti;
1659 uint8_t lun, selid, target;
1661 NCR_LOCK_ASSERT(sc, MA_OWNED);
1663 if (sc->sc_rev == NCR_VARIANT_FAS366)
1664 target = sc->sc_selid;
1667 * The SCSI chip made a snapshot of the data bus
1668 * while the reselection was being negotiated.
1669 * This enables us to determine which target did
1672 selid = sc->sc_selid & ~(1 << sc->sc_id);
1673 if (selid & (selid - 1)) {
1674 device_printf(sc->sc_dev, "reselect with invalid "
1675 "selid %02x; sending DEVICE RESET\n", selid);
1679 target = ffs(selid) - 1;
1681 lun = message & 0x07;
1684 * Search wait queue for disconnected command.
1685 * The list should be short, so I haven't bothered with
1686 * any more sophisticated structures than a simple
1687 * singly linked list.
1689 ti = &sc->sc_tinfo[target];
1690 li = TINFO_LUN(ti, lun);
1693 * We can get as far as the LUN with the IDENTIFY
1694 * message. Check to see if we're running an
1695 * untagged command. Otherwise ack the IDENTIFY
1696 * and wait for a tag message.
1699 if (li->untagged != NULL && li->busy)
1701 else if (tagtype != MSG_SIMPLE_Q_TAG) {
1702 /* Wait for tag to come by. */
1703 sc->sc_state = NCR_IDENTIFIED;
1706 ecb = li->queued[tagid];
1709 device_printf(sc->sc_dev, "reselect from target %d lun %d "
1710 "tag %x:%x with no nexus; sending ABORT\n",
1711 target, lun, tagtype, tagid);
1715 /* Make this nexus active again. */
1716 sc->sc_state = NCR_CONNECTED;
1718 ncr53c9x_setsync(sc, ti);
1720 if (ecb->flags & ECB_RESET)
1721 ncr53c9x_sched_msgout(SEND_DEV_RESET);
1722 else if (ecb->flags & ECB_ABORT)
1723 ncr53c9x_sched_msgout(SEND_ABORT);
1725 /* Do an implicit RESTORE POINTERS. */
1726 sc->sc_dp = ecb->daddr;
1727 sc->sc_dleft = ecb->dleft;
1732 ncr53c9x_sched_msgout(SEND_DEV_RESET);
1736 ncr53c9x_sched_msgout(SEND_ABORT);
1740 /* From NetBSD; these should go into CAM at some point. */
1741 #define MSG_ISEXTENDED(m) ((m) == MSG_EXTENDED)
1742 #define MSG_IS1BYTE(m) \
1743 ((!MSG_ISEXTENDED(m) && (m) < 0x20) || MSG_ISIDENTIFY(m))
1744 #define MSG_IS2BYTE(m) (((m) & 0xf0) == 0x20)
1747 __verify_msg_format(uint8_t *p, int len)
1750 if (len == 1 && MSG_IS1BYTE(p[0]))
1752 if (len == 2 && MSG_IS2BYTE(p[0]))
1754 if (len >= 3 && MSG_ISEXTENDED(p[0]) &&
1762 * Get an incoming message as initiator.
1764 * The SCSI bus must already be in MESSAGE_IN_PHASE and there is a
1768 ncr53c9x_msgin(struct ncr53c9x_softc *sc)
1770 struct ncr53c9x_ecb *ecb;
1771 struct ncr53c9x_linfo *li;
1772 struct ncr53c9x_tinfo *ti;
1776 NCR_LOCK_ASSERT(sc, MA_OWNED);
1778 NCR_TRACE(("[%s(curmsglen:%ld)] ", __func__, (long)sc->sc_imlen));
1780 if (sc->sc_imlen == 0) {
1781 device_printf(sc->sc_dev, "msgin: no msg byte available\n");
1786 * Prepare for a new message. A message should (according
1787 * to the SCSI standard) be transmitted in one single
1788 * MESSAGE_IN_PHASE. If we have been in some other phase,
1789 * then this is a new message.
1791 if (sc->sc_prevphase != MESSAGE_IN_PHASE &&
1792 sc->sc_state != NCR_RESELECTED) {
1793 device_printf(sc->sc_dev, "phase change, dropping message, "
1794 "prev %d, state %d\n", sc->sc_prevphase, sc->sc_state);
1795 sc->sc_flags &= ~NCR_DROP_MSGI;
1800 * If we're going to reject the message, don't bother storing
1801 * the incoming bytes. But still, we need to ACK them.
1803 if ((sc->sc_flags & NCR_DROP_MSGI) != 0) {
1804 NCRCMD(sc, NCRCMD_MSGOK);
1805 device_printf(sc->sc_dev, "<dropping msg byte %x>",
1806 sc->sc_imess[sc->sc_imlen]);
1810 if (sc->sc_imlen >= NCR_MAX_MSG_LEN) {
1811 ncr53c9x_sched_msgout(SEND_REJECT);
1812 sc->sc_flags |= NCR_DROP_MSGI;
1814 switch (sc->sc_state) {
1816 * if received message is the first of reselection
1817 * then first byte is selid, and then message
1819 case NCR_RESELECTED:
1820 pb = sc->sc_imess + 1;
1821 plen = sc->sc_imlen - 1;
1826 plen = sc->sc_imlen;
1829 if (__verify_msg_format(pb, plen))
1833 /* Acknowledge what we have so far. */
1834 NCRCMD(sc, NCRCMD_MSGOK);
1838 NCR_MSGS(("gotmsg(%x) state %d", sc->sc_imess[0], sc->sc_state));
1840 * We got a complete message, flush the imess.
1841 * XXX nobody uses imlen below.
1845 * Now we should have a complete message (1 byte, 2 byte
1846 * and moderately long extended messages). We only handle
1847 * extended messages which total length is shorter than
1848 * NCR_MAX_MSG_LEN. Longer messages will be amputated.
1850 switch (sc->sc_state) {
1853 ti = &sc->sc_tinfo[ecb->ccb->ccb_h.target_id];
1855 switch (sc->sc_imess[0]) {
1856 case MSG_CMDCOMPLETE:
1857 NCR_MSGS(("cmdcomplete "));
1858 if (sc->sc_dleft < 0) {
1859 xpt_print_path(ecb->ccb->ccb_h.path);
1860 printf("got %ld extra bytes\n",
1861 -(long)sc->sc_dleft);
1864 ecb->dleft = (ecb->flags & ECB_TENTATIVE_DONE) ?
1866 if ((ecb->flags & ECB_SENSE) == 0)
1867 ecb->ccb->csio.resid = ecb->dleft;
1868 sc->sc_state = NCR_CMDCOMPLETE;
1871 case MSG_MESSAGE_REJECT:
1872 NCR_MSGS(("msg reject (msgout=%x) ", sc->sc_msgout));
1873 switch (sc->sc_msgout) {
1876 * Target does not like tagged queuing.
1877 * - Flush the command queue
1878 * - Disable tagged queuing for the target
1879 * - Dequeue ecb from the queued array.
1881 device_printf(sc->sc_dev, "tagged queuing "
1882 "rejected: target %d\n",
1883 ecb->ccb->ccb_h.target_id);
1885 NCR_MSGS(("(rejected sent tag)"));
1886 NCRCMD(sc, NCRCMD_FLUSH);
1888 ti->flags &= ~T_TAG;
1889 lun = ecb->ccb->ccb_h.target_lun;
1890 li = TINFO_LUN(ti, lun);
1892 li->queued[ecb->tag[1]] != NULL) {
1893 li->queued[ecb->tag[1]] = NULL;
1896 ecb->tag[0] = ecb->tag[1] = 0;
1902 device_printf(sc->sc_dev, "sync transfer "
1903 "rejected: target %d\n",
1904 ecb->ccb->ccb_h.target_id);
1906 ti->flags &= ~T_SDTRSENT;
1907 ti->curr.period = ti->goal.period = 0;
1908 ti->curr.offset = ti->goal.offset = 0;
1909 ncr53c9x_setsync(sc, ti);
1913 device_printf(sc->sc_dev, "wide transfer "
1914 "rejected: target %d\n",
1915 ecb->ccb->ccb_h.target_id);
1917 ti->flags &= ~T_WDTRSENT;
1918 ti->curr.width = ti->goal.width =
1919 MSG_EXT_WDTR_BUS_8_BIT;
1920 ncr53c9x_setsync(sc, ti);
1923 case SEND_INIT_DET_ERR:
1929 NCR_MSGS(("noop "));
1932 case MSG_HEAD_OF_Q_TAG:
1933 case MSG_SIMPLE_Q_TAG:
1934 case MSG_ORDERED_Q_TAG:
1935 NCR_MSGS(("TAG %x:%x",
1936 sc->sc_imess[0], sc->sc_imess[1]));
1939 case MSG_DISCONNECT:
1940 NCR_MSGS(("disconnect "));
1942 sc->sc_state = NCR_DISCONNECT;
1945 * Mark the fact that all bytes have moved. The
1946 * target may not bother to do a SAVE POINTERS
1947 * at this stage. This flag will set the residual
1948 * count to zero on MSG COMPLETE.
1950 if (sc->sc_dleft == 0)
1951 ecb->flags |= ECB_TENTATIVE_DONE;
1954 case MSG_SAVEDATAPOINTER:
1955 NCR_MSGS(("save datapointer "));
1956 ecb->daddr = sc->sc_dp;
1957 ecb->dleft = sc->sc_dleft;
1960 case MSG_RESTOREPOINTERS:
1961 NCR_MSGS(("restore datapointer "));
1962 sc->sc_dp = ecb->daddr;
1963 sc->sc_dleft = ecb->dleft;
1967 NCR_MSGS(("extended(%x) ", sc->sc_imess[2]));
1968 switch (sc->sc_imess[2]) {
1970 NCR_MSGS(("SDTR period %d, offset %d ",
1971 sc->sc_imess[3], sc->sc_imess[4]));
1972 if (sc->sc_imess[1] != 3)
1974 ti->curr.period = sc->sc_imess[3];
1975 ti->curr.offset = sc->sc_imess[4];
1976 if (sc->sc_minsync == 0 ||
1977 ti->curr.offset == 0 ||
1978 ti->curr.period > 124) {
1980 #ifdef NCR53C9X_DEBUG
1981 xpt_print_path(ecb->ccb->ccb_h.path);
1982 printf("async mode\n");
1985 if ((ti->flags & T_SDTRSENT) == 0) {
1987 * target initiated negotiation
1989 ti->curr.offset = 0;
1990 ncr53c9x_sched_msgout(
1995 ncr53c9x_cpb2stp(sc,
1996 ncr53c9x_stp2cpb(sc,
1998 if ((ti->flags & T_SDTRSENT) == 0) {
2000 * target initiated negotiation
2002 if (ti->curr.period <
2006 if (ti->curr.offset >
2010 ncr53c9x_sched_msgout(
2014 ti->flags &= ~T_SDTRSENT;
2015 ti->goal.period = ti->curr.period;
2016 ti->goal.offset = ti->curr.offset;
2017 ncr53c9x_setsync(sc, ti);
2021 NCR_MSGS(("wide mode %d ", sc->sc_imess[3]));
2022 ti->curr.width = sc->sc_imess[3];
2023 if (!(ti->flags & T_WDTRSENT))
2025 * target initiated negotiation
2027 ncr53c9x_sched_msgout(SEND_WDTR);
2028 ti->flags &= ~T_WDTRSENT;
2029 ti->goal.width = ti->curr.width;
2030 ncr53c9x_setsync(sc, ti);
2034 xpt_print_path(ecb->ccb->ccb_h.path);
2035 printf("unrecognized MESSAGE EXTENDED 0x%x;"
2036 " sending REJECT\n", sc->sc_imess[2]);
2042 NCR_MSGS(("ident "));
2043 xpt_print_path(ecb->ccb->ccb_h.path);
2044 printf("unrecognized MESSAGE 0x%x; sending REJECT\n",
2048 ncr53c9x_sched_msgout(SEND_REJECT);
2053 case NCR_IDENTIFIED:
2055 * IDENTIFY message was received and queue tag is expected
2058 if ((sc->sc_imess[0] != MSG_SIMPLE_Q_TAG) ||
2059 (sc->sc_msgify == 0)) {
2060 device_printf(sc->sc_dev, "TAG reselect without "
2061 "IDENTIFY; MSG %x; sending DEVICE RESET\n",
2065 (void)ncr53c9x_reselect(sc, sc->sc_msgify,
2066 sc->sc_imess[0], sc->sc_imess[1]);
2069 case NCR_RESELECTED:
2070 if (MSG_ISIDENTIFY(sc->sc_imess[1]))
2071 sc->sc_msgify = sc->sc_imess[1];
2073 device_printf(sc->sc_dev, "reselect without IDENTIFY;"
2074 " MSG %x; sending DEVICE RESET\n", sc->sc_imess[1]);
2077 (void)ncr53c9x_reselect(sc, sc->sc_msgify, 0, 0);
2081 device_printf(sc->sc_dev, "unexpected MESSAGE IN; "
2082 "sending DEVICE RESET\n");
2085 ncr53c9x_sched_msgout(SEND_DEV_RESET);
2089 ncr53c9x_sched_msgout(SEND_ABORT);
2092 /* If we have more messages to send set ATN. */
2093 if (sc->sc_msgpriq) {
2094 NCRCMD(sc, NCRCMD_SETATN);
2095 sc->sc_flags |= NCR_ATN;
2098 /* Acknowledge last message byte. */
2099 NCRCMD(sc, NCRCMD_MSGOK);
2101 /* Done, reset message pointer. */
2102 sc->sc_flags &= ~NCR_DROP_MSGI;
2107 * Send the highest priority, scheduled message.
2110 ncr53c9x_msgout(struct ncr53c9x_softc *sc)
2112 struct ncr53c9x_tinfo *ti;
2113 struct ncr53c9x_ecb *ecb;
2116 #ifdef NCR53C9X_DEBUG
2120 NCR_LOCK_ASSERT(sc, MA_OWNED);
2122 NCR_TRACE(("[%s(priq:%x, prevphase:%x)]", __func__, sc->sc_msgpriq,
2126 * XXX - the NCR_ATN flag is not in sync with the actual ATN
2127 * condition on the SCSI bus. The 53c9x chip
2128 * automatically turns off ATN before sending the
2129 * message byte. (See also the comment below in the
2130 * default case when picking out a message to send.)
2132 if (sc->sc_flags & NCR_ATN) {
2133 if (sc->sc_prevphase != MESSAGE_OUT_PHASE) {
2135 NCRCMD(sc, NCRCMD_FLUSH);
2143 if (sc->sc_prevphase == MESSAGE_OUT_PHASE) {
2144 ncr53c9x_sched_msgout(sc->sc_msgoutq);
2147 device_printf(sc->sc_dev, "at line %d: unexpected "
2148 "MESSAGE OUT phase\n", __LINE__);
2151 if (sc->sc_omlen == 0) {
2152 /* Pick up highest priority message. */
2153 sc->sc_msgout = sc->sc_msgpriq & -sc->sc_msgpriq;
2154 sc->sc_msgoutq |= sc->sc_msgout;
2155 sc->sc_msgpriq &= ~sc->sc_msgout;
2156 sc->sc_omlen = 1; /* "Default" message len */
2157 switch (sc->sc_msgout) {
2160 ti = &sc->sc_tinfo[ecb->ccb->ccb_h.target_id];
2161 sc->sc_omess[0] = MSG_EXTENDED;
2162 sc->sc_omess[1] = MSG_EXT_SDTR_LEN;
2163 sc->sc_omess[2] = MSG_EXT_SDTR;
2164 sc->sc_omess[3] = ti->goal.period;
2165 sc->sc_omess[4] = ti->goal.offset;
2171 ti = &sc->sc_tinfo[ecb->ccb->ccb_h.target_id];
2172 sc->sc_omess[0] = MSG_EXTENDED;
2173 sc->sc_omess[1] = MSG_EXT_WDTR_LEN;
2174 sc->sc_omess[2] = MSG_EXT_WDTR;
2175 sc->sc_omess[3] = ti->goal.width;
2180 if (sc->sc_state != NCR_CONNECTED)
2181 device_printf(sc->sc_dev, "at line %d: no "
2182 "nexus\n", __LINE__);
2185 MSG_IDENTIFY(ecb->ccb->ccb_h.target_lun, 0);
2189 if (sc->sc_state != NCR_CONNECTED)
2190 device_printf(sc->sc_dev, "at line %d: no "
2191 "nexus\n", __LINE__);
2193 sc->sc_omess[0] = ecb->tag[0];
2194 sc->sc_omess[1] = ecb->tag[1];
2198 case SEND_DEV_RESET:
2199 sc->sc_flags |= NCR_ABORTING;
2200 sc->sc_omess[0] = MSG_BUS_DEV_RESET;
2202 ti = &sc->sc_tinfo[ecb->ccb->ccb_h.target_id];
2203 ti->curr.period = 0;
2204 ti->curr.offset = 0;
2205 ti->curr.width = MSG_EXT_WDTR_BUS_8_BIT;
2208 case SEND_PARITY_ERROR:
2209 sc->sc_omess[0] = MSG_PARITY_ERROR;
2213 sc->sc_flags |= NCR_ABORTING;
2214 sc->sc_omess[0] = MSG_ABORT;
2217 case SEND_INIT_DET_ERR:
2218 sc->sc_omess[0] = MSG_INITIATOR_DET_ERR;
2222 sc->sc_omess[0] = MSG_MESSAGE_REJECT;
2227 * We normally do not get here, since the chip
2228 * automatically turns off ATN before the last
2229 * byte of a message is sent to the target.
2230 * However, if the target rejects our (multi-byte)
2231 * message early by switching to MSG IN phase
2232 * ATN remains on, so the target may return to
2233 * MSG OUT phase. If there are no scheduled messages
2234 * left we send a NO-OP.
2236 * XXX - Note that this leaves no useful purpose for
2239 sc->sc_flags &= ~NCR_ATN;
2240 sc->sc_omess[0] = MSG_NOOP;
2242 sc->sc_omp = sc->sc_omess;
2245 #ifdef NCR53C9X_DEBUG
2246 if ((ncr53c9x_debug & NCR_SHOWMSGS) != 0) {
2247 NCR_MSGS(("<msgout:"));
2248 for (i = 0; i < sc->sc_omlen; i++)
2249 NCR_MSGS((" %02x", sc->sc_omess[i]));
2254 if (sc->sc_rev != NCR_VARIANT_FAS366) {
2255 /* (Re)send the message. */
2256 size = ulmin(sc->sc_omlen, sc->sc_maxxfer);
2257 error = NCRDMA_SETUP(sc, &sc->sc_omp, &sc->sc_omlen, 0, &size);
2261 /* Program the SCSI counter. */
2262 NCR_SET_COUNT(sc, size);
2264 /* Load the count in and start the message-out transfer. */
2265 NCRCMD(sc, NCRCMD_NOP | NCRCMD_DMA);
2266 NCRCMD(sc, NCRCMD_TRANS | NCRCMD_DMA);
2275 ncr53c9x_flushfifo(sc);
2276 ncr53c9x_wrfifo(sc, sc->sc_omp, sc->sc_omlen);
2277 NCRCMD(sc, NCRCMD_TRANS);
2281 ncr53c9x_intr(void *arg)
2283 struct ncr53c9x_softc *sc = arg;
2285 if (!NCRDMA_ISINTR(sc))
2296 * This is the most critical part of the driver, and has to know
2297 * how to deal with *all* error conditions and phases from the SCSI
2298 * bus. If there are no errors and the DMA was active, then call the
2299 * DMA pseudo-interrupt handler. If this returns 1, then that was it
2300 * and we can return from here without further processing.
2302 * Most of this needs verifying.
2305 ncr53c9x_intr1(struct ncr53c9x_softc *sc)
2307 struct ncr53c9x_ecb *ecb;
2308 struct ncr53c9x_linfo *li;
2309 struct ncr53c9x_tinfo *ti;
2310 struct timeval cur, wait;
2312 int error, i, nfifo;
2315 NCR_LOCK_ASSERT(sc, MA_OWNED);
2317 NCR_INTS(("[ncr53c9x_intr: state %d]", sc->sc_state));
2320 /* and what do the registers say... */
2321 ncr53c9x_readregs(sc);
2324 * At the moment, only a SCSI Bus Reset or Illegal
2325 * Command are classed as errors. A disconnect is a
2326 * valid condition, and we let the code check is the
2327 * "NCR_BUSFREE_OK" flag was set before declaring it
2330 * Also, the status register tells us about "Gross
2331 * Errors" and "Parity errors". Only the Gross Error
2332 * is really bad, and the parity errors are dealt
2336 * If there are too many parity error, go to slow
2340 if ((sc->sc_espintr & NCRINTR_SBR) != 0) {
2341 if ((NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF) != 0) {
2342 NCRCMD(sc, NCRCMD_FLUSH);
2345 if (sc->sc_state != NCR_SBR) {
2346 device_printf(sc->sc_dev, "SCSI bus reset\n");
2347 ncr53c9x_init(sc, 0); /* Restart everything. */
2351 /*XXX*/ device_printf(sc->sc_dev, "<expected bus reset: "
2352 "[intr %x, stat %x, step %d]>\n",
2353 sc->sc_espintr, sc->sc_espstat, sc->sc_espstep);
2355 if (sc->sc_nexus != NULL)
2356 panic("%s: nexus in reset state",
2357 device_get_nameunit(sc->sc_dev));
2363 #define NCRINTR_ERR (NCRINTR_SBR | NCRINTR_ILL)
2364 if (sc->sc_espintr & NCRINTR_ERR ||
2365 sc->sc_espstat & NCRSTAT_GE) {
2366 if ((sc->sc_espstat & NCRSTAT_GE) != 0) {
2367 /* Gross Error; no target? */
2368 if (NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF) {
2369 NCRCMD(sc, NCRCMD_FLUSH);
2372 if (sc->sc_state == NCR_CONNECTED ||
2373 sc->sc_state == NCR_SELECTING) {
2374 ecb->ccb->ccb_h.status = CAM_SEL_TIMEOUT;
2375 ncr53c9x_done(sc, ecb);
2380 if ((sc->sc_espintr & NCRINTR_ILL) != 0) {
2381 if ((sc->sc_flags & NCR_EXPECT_ILLCMD) != 0) {
2383 * Eat away "Illegal command" interrupt
2384 * on a ESP100 caused by a re-selection
2385 * while we were trying to select
2388 #ifdef NCR53C9X_DEBUG
2389 device_printf(sc->sc_dev, "ESP100 work-around "
2392 sc->sc_flags &= ~NCR_EXPECT_ILLCMD;
2395 /* Illegal command, out of sync? */
2396 device_printf(sc->sc_dev, "illegal command: 0x%x "
2397 "(state %d, phase %x, prevphase %x)\n",
2399 sc->sc_state, sc->sc_phase, sc->sc_prevphase);
2400 if (NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF) {
2401 NCRCMD(sc, NCRCMD_FLUSH);
2407 sc->sc_flags &= ~NCR_EXPECT_ILLCMD;
2410 * Call if DMA is active.
2412 * If DMA_INTR returns true, then maybe go 'round the loop
2413 * again in case there is no more DMA queued, but a phase
2414 * change is expected.
2416 if (NCRDMA_ISACTIVE(sc)) {
2417 if (NCRDMA_INTR(sc) == -1) {
2418 device_printf(sc->sc_dev, "DMA error; resetting\n");
2421 /* If DMA active here, then go back to work... */
2422 if (NCRDMA_ISACTIVE(sc))
2425 if ((sc->sc_espstat & NCRSTAT_TC) == 0) {
2427 * DMA not completed. If we can not find a
2428 * acceptable explanation, print a diagnostic.
2430 if (sc->sc_state == NCR_SELECTING)
2432 * This can happen if we are reselected
2433 * while using DMA to select a target.
2436 else if (sc->sc_prevphase == MESSAGE_OUT_PHASE) {
2438 * Our (multi-byte) message (eg SDTR) was
2439 * interrupted by the target to send
2441 * Print diagnostic if current phase
2442 * is not MESSAGE IN.
2444 if (sc->sc_phase != MESSAGE_IN_PHASE)
2445 device_printf(sc->sc_dev,"!TC on MSGOUT"
2446 " [intr %x, stat %x, step %d]"
2447 " prevphase %x, resid %lx\n",
2452 (u_long)sc->sc_omlen);
2453 } else if (sc->sc_dleft == 0) {
2455 * The DMA operation was started for
2456 * a DATA transfer. Print a diagnostic
2457 * if the DMA counter and TC bit
2458 * appear to be out of sync.
2460 * XXX This is fatal and usually means that
2461 * the DMA engine is hopelessly out of
2462 * sync with reality. A disk is likely
2463 * getting spammed at this point.
2465 device_printf(sc->sc_dev, "!TC on DATA XFER"
2466 " [intr %x, stat %x, step %d]"
2467 " prevphase %x, resid %x\n",
2472 ecb ? ecb->dleft : -1);
2479 * Check for less serious errors.
2481 if ((sc->sc_espstat & NCRSTAT_PE) != 0) {
2482 device_printf(sc->sc_dev, "SCSI bus parity error\n");
2483 if (sc->sc_prevphase == MESSAGE_IN_PHASE)
2484 ncr53c9x_sched_msgout(SEND_PARITY_ERROR);
2486 ncr53c9x_sched_msgout(SEND_INIT_DET_ERR);
2489 if ((sc->sc_espintr & NCRINTR_DIS) != 0) {
2491 NCR_INTS(("<DISC [intr %x, stat %x, step %d]>",
2492 sc->sc_espintr,sc->sc_espstat,sc->sc_espstep));
2493 if (NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF) {
2494 NCRCMD(sc, NCRCMD_FLUSH);
2500 * This command must (apparently) be issued within
2501 * 250mS of a disconnect. So here you are...
2503 NCRCMD(sc, NCRCMD_ENSEL);
2505 switch (sc->sc_state) {
2506 case NCR_RESELECTED:
2510 ecb->ccb->ccb_h.status = CAM_SEL_TIMEOUT;
2512 /* Selection timeout -- discard all LUNs if empty. */
2513 ti = &sc->sc_tinfo[ecb->ccb->ccb_h.target_id];
2514 li = LIST_FIRST(&ti->luns);
2515 while (li != NULL) {
2516 if (li->untagged == NULL && li->used == 0) {
2517 if (li->lun < NCR_NLUN)
2518 ti->lun[li->lun] = NULL;
2519 LIST_REMOVE(li, link);
2522 * Restart the search at the beginning.
2524 li = LIST_FIRST(&ti->luns);
2527 li = LIST_NEXT(li, link);
2533 ti = &sc->sc_tinfo[ecb->ccb->ccb_h.target_id];
2534 if ((ti->flags & T_SDTRSENT) != 0) {
2535 xpt_print_path(ecb->ccb->ccb_h.path);
2536 printf("sync nego not completed!\n");
2537 ti->flags &= ~T_SDTRSENT;
2538 ti->curr.period = ti->goal.period = 0;
2539 ti->curr.offset = ti->goal.offset = 0;
2540 ncr53c9x_setsync(sc, ti);
2542 if ((ti->flags & T_WDTRSENT) != 0) {
2543 xpt_print_path(ecb->ccb->ccb_h.path);
2544 printf("wide nego not completed!\n");
2545 ti->flags &= ~T_WDTRSENT;
2546 ti->curr.width = ti->goal.width =
2547 MSG_EXT_WDTR_BUS_8_BIT;
2548 ncr53c9x_setsync(sc, ti);
2552 /* It may be OK to disconnect. */
2553 if ((sc->sc_flags & NCR_ABORTING) == 0) {
2555 * Section 5.1.1 of the SCSI 2 spec
2556 * suggests issuing a REQUEST SENSE
2557 * following an unexpected disconnect.
2558 * Some devices go into a contingent
2559 * allegiance condition when
2560 * disconnecting, and this is necessary
2561 * to clean up their state.
2563 device_printf(sc->sc_dev, "unexpected "
2564 "disconnect [state %d, intr %x, stat %x, "
2565 "phase(c %x, p %x)]; ", sc->sc_state,
2566 sc->sc_espintr, sc->sc_espstat,
2567 sc->sc_phase, sc->sc_prevphase);
2570 * XXX This will cause a chip reset and will
2571 * prevent us from finding out the real
2572 * problem with the device. However, it's
2573 * necessary until a way can be found to
2574 * safely cancel the DMA that is in
2577 if (1 || (ecb->flags & ECB_SENSE) != 0) {
2578 printf("resetting\n");
2581 printf("sending REQUEST SENSE\n");
2582 callout_stop(&ecb->ch);
2583 ncr53c9x_sense(sc, ecb);
2585 } else if (ecb != NULL &&
2586 (ecb->flags & ECB_RESET) != 0) {
2587 ecb->ccb->ccb_h.status = CAM_REQ_CMP;
2591 ecb->ccb->ccb_h.status = CAM_CMD_TIMEOUT;
2594 case NCR_DISCONNECT:
2595 sc->sc_nexus = NULL;
2598 case NCR_CMDCOMPLETE:
2599 ecb->ccb->ccb_h.status = CAM_REQ_CMP;
2604 switch (sc->sc_state) {
2606 device_printf(sc->sc_dev, "waiting for Bus Reset to happen\n");
2609 case NCR_RESELECTED:
2611 * We must be continuing a message?
2613 device_printf(sc->sc_dev, "unhandled reselect continuation, "
2614 "state %d, intr %02x\n", sc->sc_state, sc->sc_espintr);
2618 case NCR_IDENTIFIED:
2620 if (sc->sc_phase != MESSAGE_IN_PHASE) {
2621 i = NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF;
2623 * Things are seriously screwed up.
2624 * Pull the brakes, i.e. reset.
2626 device_printf(sc->sc_dev, "target didn't send tag: %d "
2627 "bytes in FIFO\n", i);
2628 /* Drain and display FIFO. */
2630 printf("[%d] ", NCR_READ_REG(sc, NCR_FIFO));
2639 if (sc->sc_espintr & NCRINTR_RESEL) {
2640 sc->sc_msgpriq = sc->sc_msgout = sc->sc_msgoutq = 0;
2643 * If we're trying to select a
2644 * target ourselves, push our command
2645 * back into the ready list.
2647 if (sc->sc_state == NCR_SELECTING) {
2648 NCR_INTS(("backoff selector "));
2649 callout_stop(&ecb->ch);
2650 ncr53c9x_dequeue(sc, ecb);
2651 TAILQ_INSERT_HEAD(&sc->ready_list, ecb, chain);
2652 ecb->flags |= ECB_READY;
2653 ecb = sc->sc_nexus = NULL;
2655 sc->sc_state = NCR_RESELECTED;
2656 if (sc->sc_phase != MESSAGE_IN_PHASE) {
2658 * Things are seriously screwed up.
2659 * Pull the brakes, i.e. reset
2661 device_printf(sc->sc_dev, "target didn't "
2666 * The C90 only inhibits FIFO writes until reselection
2667 * is complete instead of waiting until the interrupt
2668 * status register has been read. So, if the reselect
2669 * happens while we were entering command bytes (for
2670 * another target) some of those bytes can appear in
2671 * the FIFO here, after the interrupt is taken.
2673 * To remedy this situation, pull the Selection ID
2674 * and Identify message from the FIFO directly, and
2675 * ignore any extraneous FIFO contents. Also, set
2676 * a flag that allows one Illegal Command Interrupt
2677 * to occur which the chip also generates as a result
2678 * of writing to the FIFO during a reselect.
2680 if (sc->sc_rev == NCR_VARIANT_ESP100) {
2682 NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF;
2683 sc->sc_imess[0] = NCR_READ_REG(sc, NCR_FIFO);
2684 sc->sc_imess[1] = NCR_READ_REG(sc, NCR_FIFO);
2687 /* Flush the rest. */
2688 NCRCMD(sc, NCRCMD_FLUSH);
2690 sc->sc_flags |= NCR_EXPECT_ILLCMD;
2692 nfifo = 2; /* We fixed it... */
2694 nfifo = ncr53c9x_rdfifo(sc, NCR_RDFIFO_START);
2697 device_printf(sc->sc_dev, "RESELECT: %d bytes "
2698 "in FIFO! [intr %x, stat %x, step %d, "
2707 sc->sc_selid = sc->sc_imess[0];
2708 NCR_INTS(("selid=%02x ", sc->sc_selid));
2710 /* Handle IDENTIFY message. */
2713 if (sc->sc_state != NCR_CONNECTED &&
2714 sc->sc_state != NCR_IDENTIFIED) {
2715 /* IDENTIFY fail?! */
2716 device_printf(sc->sc_dev, "identify failed, "
2717 "state %d, intr %02x\n", sc->sc_state,
2721 goto shortcut; /* i.e. next phase expected soon */
2724 #define NCRINTR_DONE (NCRINTR_FC | NCRINTR_BS)
2725 if ((sc->sc_espintr & NCRINTR_DONE) == NCRINTR_DONE) {
2727 * Arbitration won; examine the `step' register
2728 * to determine how far the selection could progress.
2732 * When doing path inquiry during boot
2733 * FAS100A trigger a stray interrupt which
2734 * we just ignore instead of panicing.
2736 if (sc->sc_state == NCR_IDLE &&
2737 sc->sc_espstep == 0)
2739 panic("%s: no nexus", __func__);
2742 ti = &sc->sc_tinfo[ecb->ccb->ccb_h.target_id];
2744 switch (sc->sc_espstep) {
2747 * The target did not respond with a
2748 * message out phase - probably an old
2749 * device that doesn't recognize ATN.
2750 * Clear ATN and just continue, the
2751 * target should be in the command
2753 * XXX check for command phase?
2755 NCRCMD(sc, NCRCMD_RSTATN);
2759 if (ti->curr.period == ti->goal.period &&
2760 ti->curr.offset == ti->goal.offset &&
2761 ti->curr.width == ti->goal.width &&
2763 device_printf(sc->sc_dev, "step 1 "
2764 "and no negotiation to perform "
2765 "or tag to send\n");
2768 if (sc->sc_phase != MESSAGE_OUT_PHASE) {
2769 device_printf(sc->sc_dev, "step 1 "
2770 "but not in MESSAGE_OUT_PHASE\n");
2773 sc->sc_prevphase = MESSAGE_OUT_PHASE; /* XXX */
2774 if (ecb->flags & ECB_RESET) {
2776 * A DEVICE RESET was scheduled and
2777 * ATNS used. As SEND_DEV_RESET has
2778 * the highest priority, the target
2779 * will reset and disconnect and we
2780 * will end up in ncr53c9x_done w/o
2781 * negotiating or sending a TAG. So
2782 * we just break here in order to
2783 * avoid warnings about negotiation
2784 * not having completed.
2786 ncr53c9x_sched_msgout(SEND_DEV_RESET);
2789 if (ti->curr.width != ti->goal.width) {
2790 ti->flags |= T_WDTRSENT | T_SDTRSENT;
2791 ncr53c9x_sched_msgout(SEND_WDTR |
2794 if (ti->curr.period != ti->goal.period ||
2795 ti->curr.offset != ti->goal.offset) {
2796 ti->flags |= T_SDTRSENT;
2797 ncr53c9x_sched_msgout(SEND_SDTR);
2799 if (ecb->tag[0] != 0)
2800 /* Could not do ATN3 so send TAG. */
2801 ncr53c9x_sched_msgout(SEND_TAG);
2806 * Grr, this is supposed to mean
2807 * "target left command phase prematurely".
2808 * It seems to happen regularly when
2810 * Look at FIFO to see if command went out.
2811 * (Timing problems?)
2813 if (sc->sc_features & NCR_F_DMASELECT) {
2814 if (sc->sc_cmdlen == 0)
2815 /* Hope for the best... */
2817 } else if ((NCR_READ_REG(sc, NCR_FFLAG) &
2819 /* Hope for the best... */
2822 xpt_print_path(ecb->ccb->ccb_h.path);
2823 printf("selection failed; %d left in FIFO "
2824 "[intr %x, stat %x, step %d]\n",
2825 NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF,
2826 sc->sc_espintr, sc->sc_espstat,
2828 NCRCMD(sc, NCRCMD_FLUSH);
2829 ncr53c9x_sched_msgout(SEND_ABORT);
2833 /* Select stuck at Command Phase. */
2834 NCRCMD(sc, NCRCMD_FLUSH);
2838 if (sc->sc_features & NCR_F_DMASELECT &&
2839 sc->sc_cmdlen != 0) {
2840 xpt_print_path(ecb->ccb->ccb_h.path);
2841 printf("select; %lu left in DMA buffer "
2842 "[intr %x, stat %x, step %d]\n",
2843 (u_long)sc->sc_cmdlen,
2848 /* So far, everything went fine. */
2852 sc->sc_prevphase = INVALID_PHASE; /* ??? */
2853 /* Do an implicit RESTORE POINTERS. */
2854 sc->sc_dp = ecb->daddr;
2855 sc->sc_dleft = ecb->dleft;
2856 sc->sc_state = NCR_CONNECTED;
2859 device_printf(sc->sc_dev, "unexpected status after "
2860 "select: [intr %x, stat %x, step %x]\n",
2861 sc->sc_espintr, sc->sc_espstat, sc->sc_espstep);
2862 NCRCMD(sc, NCRCMD_FLUSH);
2866 if (sc->sc_state == NCR_IDLE) {
2867 device_printf(sc->sc_dev, "stray interrupt\n");
2873 if ((sc->sc_flags & NCR_ICCS) != 0) {
2874 /* "Initiate Command Complete Steps" in progress */
2875 sc->sc_flags &= ~NCR_ICCS;
2877 if ((sc->sc_espintr & NCRINTR_DONE) == 0) {
2878 device_printf(sc->sc_dev, "ICCS: "
2879 ": [intr %x, stat %x, step %x]\n",
2880 sc->sc_espintr, sc->sc_espstat,
2883 ncr53c9x_rdfifo(sc, NCR_RDFIFO_START);
2884 if (sc->sc_imlen < 2)
2885 device_printf(sc->sc_dev, "can't get status, "
2886 "only %d bytes\n", (int)sc->sc_imlen);
2887 ecb->stat = sc->sc_imess[sc->sc_imlen - 2];
2888 msg = sc->sc_imess[sc->sc_imlen - 1];
2889 NCR_PHASE(("<stat:(%x,%x)>", ecb->stat, msg));
2890 if (msg == MSG_CMDCOMPLETE) {
2892 (ecb->flags & ECB_TENTATIVE_DONE) ?
2894 if ((ecb->flags & ECB_SENSE) == 0)
2895 ecb->ccb->csio.resid = ecb->dleft;
2896 sc->sc_state = NCR_CMDCOMPLETE;
2898 device_printf(sc->sc_dev, "STATUS_PHASE: "
2901 NCRCMD(sc, NCRCMD_MSGOK);
2902 goto shortcut; /* i.e. wait for disconnect */
2907 device_printf(sc->sc_dev, "invalid state: %d [intr %x, "
2908 "phase(c %x, p %x)]\n", sc->sc_state,
2909 sc->sc_espintr, sc->sc_phase, sc->sc_prevphase);
2914 * Driver is now in state NCR_CONNECTED, i.e. we
2915 * have a current command working the SCSI bus.
2917 if (sc->sc_state != NCR_CONNECTED || ecb == NULL)
2918 panic("%s: no nexus", __func__);
2920 switch (sc->sc_phase) {
2921 case MESSAGE_OUT_PHASE:
2922 NCR_PHASE(("MESSAGE_OUT_PHASE "));
2923 ncr53c9x_msgout(sc);
2924 sc->sc_prevphase = MESSAGE_OUT_PHASE;
2927 case MESSAGE_IN_PHASE:
2929 NCR_PHASE(("MESSAGE_IN_PHASE "));
2930 if ((sc->sc_espintr & NCRINTR_BS) != 0) {
2931 if ((sc->sc_rev != NCR_VARIANT_FAS366) ||
2932 (sc->sc_espstat2 & NCRFAS_STAT2_EMPTY) == 0) {
2933 NCRCMD(sc, NCRCMD_FLUSH);
2935 sc->sc_flags |= NCR_WAITI;
2936 NCRCMD(sc, NCRCMD_TRANS);
2937 } else if ((sc->sc_espintr & NCRINTR_FC) != 0) {
2938 if ((sc->sc_flags & NCR_WAITI) == 0) {
2939 device_printf(sc->sc_dev, "MSGIN: unexpected "
2940 "FC bit: [intr %x, stat %x, step %x]\n",
2941 sc->sc_espintr, sc->sc_espstat,
2944 sc->sc_flags &= ~NCR_WAITI;
2946 (sc->sc_prevphase == sc->sc_phase) ?
2947 NCR_RDFIFO_CONTINUE : NCR_RDFIFO_START);
2950 device_printf(sc->sc_dev, "MSGIN: weird bits: "
2951 "[intr %x, stat %x, step %x]\n",
2952 sc->sc_espintr, sc->sc_espstat, sc->sc_espstep);
2953 sc->sc_prevphase = MESSAGE_IN_PHASE;
2954 goto shortcut; /* i.e. expect data to be ready */
2958 * Send the command block. Normally we don't see this
2959 * phase because the SEL_ATN command takes care of
2960 * all this. However, we end up here if either the
2961 * target or we wanted to exchange some more messages
2962 * first (e.g. to start negotiations).
2965 NCR_PHASE(("COMMAND_PHASE 0x%02x (%d) ",
2966 ecb->cmd.cmd.opcode, ecb->clen));
2967 if (NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF) {
2968 NCRCMD(sc, NCRCMD_FLUSH);
2974 * If we have more messages to send, e.g. WDTR or SDTR
2975 * after we've sent a TAG, set ATN so we'll go back to
2976 * MESSAGE_OUT_PHASE.
2978 if (sc->sc_msgpriq) {
2979 NCRCMD(sc, NCRCMD_SETATN);
2980 sc->sc_flags |= NCR_ATN;
2982 if (sc->sc_features & NCR_F_DMASELECT) {
2983 /* Setup DMA transfer for command. */
2985 sc->sc_cmdlen = size;
2986 sc->sc_cmdp = (void *)&ecb->cmd.cmd;
2987 error = NCRDMA_SETUP(sc, &sc->sc_cmdp, &sc->sc_cmdlen,
2995 /* Program the SCSI counter. */
2996 NCR_SET_COUNT(sc, size);
2998 /* Load the count in. */
2999 NCRCMD(sc, NCRCMD_NOP | NCRCMD_DMA);
3001 /* Start the command transfer. */
3002 NCRCMD(sc, NCRCMD_TRANS | NCRCMD_DMA);
3004 sc->sc_prevphase = COMMAND_PHASE;
3008 ncr53c9x_wrfifo(sc, (uint8_t *)&ecb->cmd.cmd, ecb->clen);
3009 NCRCMD(sc, NCRCMD_TRANS);
3010 sc->sc_prevphase = COMMAND_PHASE;
3013 case DATA_OUT_PHASE:
3014 NCR_PHASE(("DATA_OUT_PHASE [%ld] ", (long)sc->sc_dleft));
3015 sc->sc_prevphase = DATA_OUT_PHASE;
3016 NCRCMD(sc, NCRCMD_FLUSH);
3017 size = ulmin(sc->sc_dleft, sc->sc_maxxfer);
3018 error = NCRDMA_SETUP(sc, &sc->sc_dp, &sc->sc_dleft, 0, &size);
3022 NCR_PHASE(("DATA_IN_PHASE "));
3023 sc->sc_prevphase = DATA_IN_PHASE;
3024 if (sc->sc_rev == NCR_VARIANT_ESP100)
3025 NCRCMD(sc, NCRCMD_FLUSH);
3026 size = ulmin(sc->sc_dleft, sc->sc_maxxfer);
3027 error = NCRDMA_SETUP(sc, &sc->sc_dp, &sc->sc_dleft, 1, &size);
3032 ecb->ccb->ccb_h.status |= CAM_REQ_TOO_BIG;
3035 panic("%s: cannot deal with deferred DMA",
3038 ecb->ccb->ccb_h.status |= CAM_REQ_INVALID;
3041 ecb->ccb->ccb_h.status |= CAM_REQUEUE_REQ;
3044 ecb->ccb->ccb_h.status |= CAM_REQ_CMP_ERR;
3049 /* Target returned to data phase: wipe "done" memory */
3050 ecb->flags &= ~ECB_TENTATIVE_DONE;
3052 /* Program the SCSI counter. */
3053 NCR_SET_COUNT(sc, size);
3055 /* Load the count in. */
3056 NCRCMD(sc, NCRCMD_NOP | NCRCMD_DMA);
3059 * Note that if `size' is 0, we've already transceived
3060 * all the bytes we want but we're still in DATA PHASE.
3061 * Apparently, the device needs padding. Also, a
3062 * transfer size of 0 means "maximum" to the chip
3066 (size == 0 ? NCRCMD_TRPAD : NCRCMD_TRANS) | NCRCMD_DMA);
3071 NCR_PHASE(("STATUS_PHASE "));
3072 sc->sc_flags |= NCR_ICCS;
3073 NCRCMD(sc, NCRCMD_ICCS);
3074 sc->sc_prevphase = STATUS_PHASE;
3075 goto shortcut; /* i.e. expect status results soon */
3081 device_printf(sc->sc_dev,
3082 "unexpected bus phase; resetting\n");
3089 ncr53c9x_init(sc, 1);
3093 ncr53c9x_done(sc, ecb);
3097 sc->sc_state = NCR_IDLE;
3103 * The idea is that many of the SCSI operations take very little
3104 * time, and going away and getting interrupted is too high an
3105 * overhead to pay. For example, selecting, sending a message
3106 * and command and then doing some work can be done in one "pass".
3108 * The delay is a heuristic. It is 2 when at 20MHz, 2 at 25MHz and 1
3109 * at 40MHz. This needs testing.
3112 wait.tv_usec += 50 / sc->sc_freq;
3113 if (wait.tv_usec > 1000000) {
3115 wait.tv_usec -= 1000000;
3118 if (NCRDMA_ISINTR(sc))
3121 } while (cur.tv_sec <= wait.tv_sec && cur.tv_usec <= wait.tv_usec);
3125 ncr53c9x_abort(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb)
3128 NCR_LOCK_ASSERT(sc, MA_OWNED);
3130 /* 2 secs for the abort */
3131 ecb->timeout = NCR_ABORT_TIMEOUT;
3132 ecb->flags |= ECB_ABORT;
3134 if (ecb == sc->sc_nexus) {
3136 * If we're still selecting, the message will be scheduled
3137 * after selection is complete.
3139 if (sc->sc_state == NCR_CONNECTED)
3140 ncr53c9x_sched_msgout(SEND_ABORT);
3143 * Reschedule callout.
3145 callout_reset(&ecb->ch, mstohz(ecb->timeout),
3146 ncr53c9x_callout, ecb);
3149 * Just leave the command where it is.
3150 * XXX - what choice do we have but to reset the SCSI
3153 if (sc->sc_state == NCR_IDLE)
3159 ncr53c9x_callout(void *arg)
3161 struct ncr53c9x_ecb *ecb = arg;
3162 union ccb *ccb = ecb->ccb;
3163 struct ncr53c9x_softc *sc = ecb->sc;
3164 struct ncr53c9x_tinfo *ti;
3166 NCR_LOCK_ASSERT(sc, MA_OWNED);
3168 ti = &sc->sc_tinfo[ccb->ccb_h.target_id];
3169 xpt_print_path(ccb->ccb_h.path);
3170 device_printf(sc->sc_dev, "timed out [ecb %p (flags 0x%x, dleft %x, "
3171 "stat %x)], <state %d, nexus %p, phase(l %x, c %x, p %x), "
3172 "resid %lx, msg(q %x,o %x) %s>",
3173 ecb, ecb->flags, ecb->dleft, ecb->stat,
3174 sc->sc_state, sc->sc_nexus,
3175 NCR_READ_REG(sc, NCR_STAT),
3176 sc->sc_phase, sc->sc_prevphase,
3177 (long)sc->sc_dleft, sc->sc_msgpriq, sc->sc_msgout,
3178 NCRDMA_ISACTIVE(sc) ? "DMA active" : "");
3179 #if defined(NCR53C9X_DEBUG) && NCR53C9X_DEBUG > 1
3180 printf("TRACE: %s.", ecb->trace);
3183 if (ecb->flags & ECB_ABORT) {
3184 /* Abort timed out. */
3186 ncr53c9x_init(sc, 1);
3188 /* Abort the operation that has timed out. */
3190 ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3191 ncr53c9x_abort(sc, ecb);
3193 /* Disable sync mode if stuck in a data phase. */
3194 if (ecb == sc->sc_nexus &&
3195 ti->curr.offset != 0 &&
3196 (sc->sc_phase & (MSGI | CDI)) == 0) {
3197 /* XXX ASYNC CALLBACK! */
3198 ti->goal.offset = 0;
3199 xpt_print_path(ccb->ccb_h.path);
3200 printf("sync negotiation disabled\n");
3206 ncr53c9x_watch(void *arg)
3208 struct ncr53c9x_softc *sc = arg;
3209 struct ncr53c9x_linfo *li;
3210 struct ncr53c9x_tinfo *ti;
3214 NCR_LOCK_ASSERT(sc, MA_OWNED);
3216 /* Delete any structures that have not been used in 10min. */
3217 old = time_second - (10 * 60);
3219 for (t = 0; t < sc->sc_ntarg; t++) {
3220 ti = &sc->sc_tinfo[t];
3221 li = LIST_FIRST(&ti->luns);
3223 if (li->last_used < old &&
3224 li->untagged == NULL &&
3226 if (li->lun < NCR_NLUN)
3227 ti->lun[li->lun] = NULL;
3228 LIST_REMOVE(li, link);
3230 /* Restart the search at the beginning. */
3231 li = LIST_FIRST(&ti->luns);
3234 li = LIST_NEXT(li, link);
3237 callout_reset(&sc->sc_watchdog, 60 * hz, ncr53c9x_watch, sc);