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freebsd-skq/sys/cam/scsi/scsi_low.c
jhb d23541b62b Lock the scsi_low code and the drivers which use it along with other 
related cleanups:
- Require each driver to initalize a mutex in the scsi_low_softc that
  is shared with the scsi_low code.  This mutex is used for CAM SIMs,
  timers, and interrupt handlers.
- Replace the osdep function switch with direct calls to the relevant
  CAM functions and direct manipulation of timers via callout(9).
- Collapse the CAM-specific scsi_low_osdep_interface substructure
  directly into scsi_low_softc.
- Use bus_*() instead of bus_space_*().
- Return BUS_PROBE_DEFAULT from probe routines instead of 0.
- No need to zero softcs.
- Pass 0ul and ~0ul instead of 0 and ~0 to bus_alloc_resource().
- Spell "dettach" as "detach".
- Remove unused 'dvname' variables.
- De-spl().

Tested by:	no one
2014-11-20 20:50:05 +00:00

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/* $NecBSD: scsi_low.c,v 1.24.10.8 2001/06/26 07:39:44 honda Exp $ */
/* $NetBSD$ */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#define SCSI_LOW_STATICS
#define SCSI_LOW_DEBUG
#define SCSI_LOW_NEGOTIATE_BEFORE_SENSE
#define SCSI_LOW_START_UP_CHECK
/* #define SCSI_LOW_INFO_DETAIL */
/* #define SCSI_LOW_QCLEAR_AFTER_CA */
/* #define SCSI_LOW_FLAGS_QUIRKS_OK */
#define SCSI_LOW_FLAGS_QUIRKS_OK
/*-
* [NetBSD for NEC PC-98 series]
* Copyright (c) 1995, 1996, 1997, 1998, 1999, 2000, 2001
* NetBSD/pc98 porting staff. All rights reserved.
* Copyright (c) 1995, 1996, 1997, 1998, 1999, 2000, 2001
* Naofumi HONDA. All rights reserved.
*
* [Ported for FreeBSD CAM]
* Copyright (c) 2000, 2001
* MITSUNAGA Noriaki, NOKUBI Hirotaka and TAKAHASHI Yoshihiro.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/* <On the nexus establishment>
* When our host is reselected,
* nexus establish processes are little complicated.
* Normal steps are followings:
* 1) Our host selected by target => target nexus (slp->sl_Tnexus)
* 2) Identify msgin => lun nexus (slp->sl_Lnexus)
* 3) Qtag msg => ccb nexus (slp->sl_Qnexus)
*/
#include "opt_ddb.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/queue.h>
#include <sys/malloc.h>
#include <sys/errno.h>
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_sim.h>
#include <cam/cam_debug.h>
#include <cam/cam_periph.h>
#include <cam/cam_xpt_periph.h>
#include <cam/scsi/scsi_all.h>
#include <cam/scsi/scsi_message.h>
#include <cam/scsi/scsi_low.h>
#include <sys/cons.h>
/**************************************************************
* Constants
**************************************************************/
#define SCSI_LOW_POLL_HZ 1000
/* functions return values */
#define SCSI_LOW_START_NO_QTAG 0
#define SCSI_LOW_START_QTAG 1
#define SCSI_LOW_DONE_COMPLETE 0
#define SCSI_LOW_DONE_RETRY 1
/* internal disk flags */
#define SCSI_LOW_DISK_DISC 0x00000001
#define SCSI_LOW_DISK_QTAG 0x00000002
#define SCSI_LOW_DISK_LINK 0x00000004
#define SCSI_LOW_DISK_PARITY 0x00000008
#define SCSI_LOW_DISK_SYNC 0x00010000
#define SCSI_LOW_DISK_WIDE_16 0x00020000
#define SCSI_LOW_DISK_WIDE_32 0x00040000
#define SCSI_LOW_DISK_WIDE (SCSI_LOW_DISK_WIDE_16 | SCSI_LOW_DISK_WIDE_32)
#define SCSI_LOW_DISK_LFLAGS 0x0000ffff
#define SCSI_LOW_DISK_TFLAGS 0xffff0000
static MALLOC_DEFINE(M_SCSILOW, "SCSI low", "SCSI low buffers");
/**************************************************************
* Declarations
**************************************************************/
/* static */ void scsi_low_info(struct scsi_low_softc *, struct targ_info *, u_char *);
static void scsi_low_engage(void *);
static struct slccb *scsi_low_establish_ccb(struct targ_info *, struct lun_info *, scsi_low_tag_t);
static int scsi_low_done(struct scsi_low_softc *, struct slccb *);
static int scsi_low_setup_done(struct scsi_low_softc *, struct slccb *);
static void scsi_low_bus_release(struct scsi_low_softc *, struct targ_info *);
static void scsi_low_twiddle_wait(void);
static struct lun_info *scsi_low_alloc_li(struct targ_info *, int, int);
static struct targ_info *scsi_low_alloc_ti(struct scsi_low_softc *, int);
static void scsi_low_calcf_lun(struct lun_info *);
static void scsi_low_calcf_target(struct targ_info *);
static void scsi_low_calcf_show(struct lun_info *);
static void scsi_low_reset_nexus(struct scsi_low_softc *, int);
static void scsi_low_reset_nexus_target(struct scsi_low_softc *, struct targ_info *, int);
static void scsi_low_reset_nexus_lun(struct scsi_low_softc *, struct lun_info *, int);
static int scsi_low_init(struct scsi_low_softc *, u_int);
static void scsi_low_start(struct scsi_low_softc *);
static void scsi_low_free_ti(struct scsi_low_softc *);
static int scsi_low_alloc_qtag(struct slccb *);
static int scsi_low_dealloc_qtag(struct slccb *);
static int scsi_low_enqueue(struct scsi_low_softc *, struct targ_info *, struct lun_info *, struct slccb *, u_int, u_int);
static int scsi_low_message_enqueue(struct scsi_low_softc *, struct targ_info *, struct lun_info *, u_int);
static void scsi_low_unit_ready_cmd(struct slccb *);
static void scsi_low_timeout(void *);
static int scsi_low_timeout_check(struct scsi_low_softc *);
#ifdef SCSI_LOW_START_UP_CHECK
static int scsi_low_start_up(struct scsi_low_softc *);
#endif /* SCSI_LOW_START_UP_CHECK */
static int scsi_low_abort_ccb(struct scsi_low_softc *, struct slccb *);
static struct slccb *scsi_low_revoke_ccb(struct scsi_low_softc *, struct slccb *, int);
int scsi_low_version_major = 2;
int scsi_low_version_minor = 17;
static struct scsi_low_softc_tab sl_tab = LIST_HEAD_INITIALIZER(sl_tab);
static struct mtx sl_tab_lock;
MTX_SYSINIT(sl_tab_lock, &sl_tab_lock, "scsi low table", MTX_DEF);
/**************************************************************
* Debug, Run test and Statics
**************************************************************/
#ifdef SCSI_LOW_INFO_DETAIL
#define SCSI_LOW_INFO(slp, ti, s) scsi_low_info((slp), (ti), (s))
#else /* !SCSI_LOW_INFO_DETAIL */
#define SCSI_LOW_INFO(slp, ti, s) device_printf((slp)->sl_dev, "%s\n", (s))
#endif /* !SCSI_LOW_INFO_DETAIL */
#ifdef SCSI_LOW_STATICS
static struct scsi_low_statics {
int nexus_win;
int nexus_fail;
int nexus_disconnected;
int nexus_reselected;
int nexus_conflict;
} scsi_low_statics;
#endif /* SCSI_LOW_STATICS */
#ifdef SCSI_LOW_DEBUG
#define SCSI_LOW_DEBUG_DONE 0x00001
#define SCSI_LOW_DEBUG_DISC 0x00002
#define SCSI_LOW_DEBUG_SENSE 0x00004
#define SCSI_LOW_DEBUG_CALCF 0x00008
#define SCSI_LOW_DEBUG_ACTION 0x10000
int scsi_low_debug = 0;
#define SCSI_LOW_MAX_ATTEN_CHECK 32
#define SCSI_LOW_ATTEN_CHECK 0x0001
#define SCSI_LOW_CMDLNK_CHECK 0x0002
#define SCSI_LOW_ABORT_CHECK 0x0004
#define SCSI_LOW_NEXUS_CHECK 0x0008
int scsi_low_test = 0;
int scsi_low_test_id = 0;
static void scsi_low_test_abort(struct scsi_low_softc *, struct targ_info *, struct lun_info *);
static void scsi_low_test_cmdlnk(struct scsi_low_softc *, struct slccb *);
static void scsi_low_test_atten(struct scsi_low_softc *, struct targ_info *, u_int);
#define SCSI_LOW_DEBUG_TEST_GO(fl, id) \
((scsi_low_test & (fl)) != 0 && (scsi_low_test_id & (1 << (id))) == 0)
#define SCSI_LOW_DEBUG_GO(fl, id) \
((scsi_low_debug & (fl)) != 0 && (scsi_low_test_id & (1 << (id))) == 0)
#endif /* SCSI_LOW_DEBUG */
/**************************************************************
* CCB
**************************************************************/
GENERIC_CCB_STATIC_ALLOC(scsi_low, slccb)
GENERIC_CCB(scsi_low, slccb, ccb_chain)
/**************************************************************
* Inline functions
**************************************************************/
#define SCSI_LOW_INLINE static __inline
SCSI_LOW_INLINE void scsi_low_activate_qtag(struct slccb *);
SCSI_LOW_INLINE void scsi_low_deactivate_qtag(struct slccb *);
SCSI_LOW_INLINE void scsi_low_ccb_message_assert(struct slccb *, u_int);
SCSI_LOW_INLINE void scsi_low_ccb_message_exec(struct scsi_low_softc *, struct slccb *);
SCSI_LOW_INLINE void scsi_low_ccb_message_retry(struct slccb *);
SCSI_LOW_INLINE void scsi_low_ccb_message_clear(struct slccb *);
SCSI_LOW_INLINE void scsi_low_init_msgsys(struct scsi_low_softc *, struct targ_info *);
SCSI_LOW_INLINE void
scsi_low_activate_qtag(cb)
struct slccb *cb;
{
struct lun_info *li = cb->li;
if (cb->ccb_tag != SCSI_LOW_UNKTAG)
return;
li->li_nqio ++;
cb->ccb_tag = cb->ccb_otag;
}
SCSI_LOW_INLINE void
scsi_low_deactivate_qtag(cb)
struct slccb *cb;
{
struct lun_info *li = cb->li;
if (cb->ccb_tag == SCSI_LOW_UNKTAG)
return;
li->li_nqio --;
cb->ccb_tag = SCSI_LOW_UNKTAG;
}
SCSI_LOW_INLINE void
scsi_low_ccb_message_exec(slp, cb)
struct scsi_low_softc *slp;
struct slccb *cb;
{
scsi_low_assert_msg(slp, cb->ti, cb->ccb_msgoutflag, 0);
cb->ccb_msgoutflag = 0;
}
SCSI_LOW_INLINE void
scsi_low_ccb_message_assert(cb, msg)
struct slccb *cb;
u_int msg;
{
cb->ccb_msgoutflag = cb->ccb_omsgoutflag = msg;
}
SCSI_LOW_INLINE void
scsi_low_ccb_message_retry(cb)
struct slccb *cb;
{
cb->ccb_msgoutflag = cb->ccb_omsgoutflag;
}
SCSI_LOW_INLINE void
scsi_low_ccb_message_clear(cb)
struct slccb *cb;
{
cb->ccb_msgoutflag = 0;
}
SCSI_LOW_INLINE void
scsi_low_init_msgsys(slp, ti)
struct scsi_low_softc *slp;
struct targ_info *ti;
{
ti->ti_msginptr = 0;
ti->ti_emsgflags = ti->ti_msgflags = ti->ti_omsgflags = 0;
SCSI_LOW_DEASSERT_ATN(slp);
SCSI_LOW_SETUP_MSGPHASE(slp, MSGPH_NULL);
}
/*=============================================================
* START OF OS switch (All OS depend fucntions should be here)
=============================================================*/
/* common os depend utitlities */
#define SCSI_LOW_CMD_RESIDUAL_CHK 0x0001
#define SCSI_LOW_CMD_ORDERED_QTAG 0x0002
#define SCSI_LOW_CMD_ABORT_WARNING 0x0004
static u_int8_t scsi_low_cmd_flags[256] = {
/* 0 1 2 3 4 5 6 7 8 9 a b c d e f */
/*0*/ 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 5, 0, 0, 0, 0, 0,
/*1*/ 0, 0, 0, 0, 0, 0, 2, 2, 0, 0, 0, 0, 0, 0, 0, 0,
/*2*/ 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 5, 0, 0, 0, 5, 5,
/*3*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 5,
};
struct scsi_low_error_code {
int error_bits;
int error_code;
};
static struct slccb *scsi_low_find_ccb(struct scsi_low_softc *, u_int, u_int, void *);
static int scsi_low_translate_error_code(struct slccb *, struct scsi_low_error_code *);
static struct slccb *
scsi_low_find_ccb(slp, target, lun, osdep)
struct scsi_low_softc *slp;
u_int target, lun;
void *osdep;
{
struct targ_info *ti;
struct lun_info *li;
struct slccb *cb;
ti = slp->sl_ti[target];
li = scsi_low_alloc_li(ti, lun, 0);
if (li == NULL)
return NULL;
if ((cb = slp->sl_Qnexus) != NULL && cb->osdep == osdep)
return cb;
TAILQ_FOREACH(cb, &slp->sl_start, ccb_chain)
{
if (cb->osdep == osdep)
return cb;
}
TAILQ_FOREACH(cb, &li->li_discq, ccb_chain)
{
if (cb->osdep == osdep)
return cb;
}
return NULL;
}
static int
scsi_low_translate_error_code(cb, tp)
struct slccb *cb;
struct scsi_low_error_code *tp;
{
if (cb->ccb_error == 0)
return tp->error_code;
for (tp ++; (cb->ccb_error & tp->error_bits) == 0; tp ++)
;
return tp->error_code;
}
/**************************************************************
* SCSI INTERFACE (CAM)
**************************************************************/
#define SCSI_LOW_MALLOC(size) malloc((size), M_SCSILOW, M_NOWAIT)
#define SCSI_LOW_FREE(pt) free((pt), M_SCSILOW)
#define SCSI_LOW_ALLOC_CCB(flags) scsi_low_get_ccb()
static void scsi_low_poll_cam(struct cam_sim *);
void scsi_low_scsi_action_cam(struct cam_sim *, union ccb *);
static int scsi_low_attach_cam(struct scsi_low_softc *);
static int scsi_low_detach_cam(struct scsi_low_softc *);
static int scsi_low_ccb_setup_cam(struct scsi_low_softc *, struct slccb *);
static int scsi_low_done_cam(struct scsi_low_softc *, struct slccb *);
struct scsi_low_error_code scsi_low_error_code_cam[] = {
{0, CAM_REQ_CMP},
{SENSEIO, CAM_AUTOSNS_VALID | CAM_REQ_CMP_ERR},
{SENSEERR, CAM_AUTOSENSE_FAIL},
{UACAERR, CAM_SCSI_STATUS_ERROR},
{BUSYERR | STATERR, CAM_SCSI_STATUS_ERROR},
{SELTIMEOUTIO, CAM_SEL_TIMEOUT},
{TIMEOUTIO, CAM_CMD_TIMEOUT},
{PDMAERR, CAM_DATA_RUN_ERR},
{PARITYERR, CAM_UNCOR_PARITY},
{UBFERR, CAM_UNEXP_BUSFREE},
{ABORTIO, CAM_REQ_ABORTED},
{-1, CAM_UNREC_HBA_ERROR}
};
#define SIM2SLP(sim) ((struct scsi_low_softc *) cam_sim_softc((sim)))
/* XXX:
* Please check a polling hz, currently we assume scsi_low_poll() is
* called each 1 ms.
*/
#define SCSI_LOW_CAM_POLL_HZ 1000 /* OK ? */
static void
scsi_low_poll_cam(sim)
struct cam_sim *sim;
{
struct scsi_low_softc *slp = SIM2SLP(sim);
SCSI_LOW_ASSERT_LOCKED(slp);
(*slp->sl_funcs->scsi_low_poll) (slp);
if (slp->sl_poll_count ++ >=
SCSI_LOW_CAM_POLL_HZ / SCSI_LOW_TIMEOUT_HZ)
{
slp->sl_poll_count = 0;
scsi_low_timeout_check(slp);
}
}
void
scsi_low_scsi_action_cam(sim, ccb)
struct cam_sim *sim;
union ccb *ccb;
{
struct scsi_low_softc *slp = SIM2SLP(sim);
struct targ_info *ti;
struct lun_info *li;
struct slccb *cb;
u_int lun, flags, msg, target;
int rv;
SCSI_LOW_ASSERT_LOCKED(slp);
target = (u_int) (ccb->ccb_h.target_id);
lun = (u_int) ccb->ccb_h.target_lun;
#ifdef SCSI_LOW_DEBUG
if (SCSI_LOW_DEBUG_GO(SCSI_LOW_DEBUG_ACTION, target) != 0)
{
device_printf(slp->sl_dev,
"cam_action: func code 0x%x target: %d, lun: %d\n",
ccb->ccb_h.func_code, target, lun);
}
#endif /* SCSI_LOW_DEBUG */
switch (ccb->ccb_h.func_code) {
case XPT_SCSI_IO: /* Execute the requested I/O operation */
#ifdef SCSI_LOW_DIAGNOSTIC
if (target == CAM_TARGET_WILDCARD || lun == CAM_LUN_WILDCARD)
{
device_printf(slp->sl_dev, "invalid target/lun\n");
ccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(ccb);
return;
}
#endif /* SCSI_LOW_DIAGNOSTIC */
if (((cb = SCSI_LOW_ALLOC_CCB(1)) == NULL)) {
ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
xpt_done(ccb);
return;
}
ti = slp->sl_ti[target];
cb->osdep = ccb;
cb->bp = NULL;
if ((ccb->ccb_h.flags & CAM_DIS_AUTOSENSE) == 0)
flags = CCB_AUTOSENSE | CCB_SCSIIO;
else
flags = CCB_SCSIIO;
li = scsi_low_alloc_li(ti, lun, 1);
if (ti->ti_setup_msg != 0)
{
scsi_low_message_enqueue(slp, ti, li, CCB_AUTOSENSE);
}
scsi_low_enqueue(slp, ti, li, cb, flags, 0);
#ifdef SCSI_LOW_DEBUG
if (SCSI_LOW_DEBUG_TEST_GO(SCSI_LOW_ABORT_CHECK, target) != 0)
{
scsi_low_test_abort(slp, ti, li);
}
#endif /* SCSI_LOW_DEBUG */
break;
case XPT_EN_LUN: /* Enable LUN as a target */
case XPT_TARGET_IO: /* Execute target I/O request */
case XPT_ACCEPT_TARGET_IO: /* Accept Host Target Mode CDB */
case XPT_CONT_TARGET_IO: /* Continue Host Target I/O Connection*/
/* XXX Implement */
ccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(ccb);
break;
case XPT_ABORT: /* Abort the specified CCB */
#ifdef SCSI_LOW_DIAGNOSTIC
if (target == CAM_TARGET_WILDCARD || lun == CAM_LUN_WILDCARD)
{
device_printf(slp->sl_dev, "invalid target/lun\n");
ccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(ccb);
return;
}
#endif /* SCSI_LOW_DIAGNOSTIC */
cb = scsi_low_find_ccb(slp, target, lun, ccb->cab.abort_ccb);
rv = scsi_low_abort_ccb(slp, cb);
if (rv == 0)
ccb->ccb_h.status = CAM_REQ_CMP;
else
ccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(ccb);
break;
case XPT_SET_TRAN_SETTINGS: {
struct ccb_trans_settings_scsi *scsi;
struct ccb_trans_settings_spi *spi;
struct ccb_trans_settings *cts;
u_int val;
#ifdef SCSI_LOW_DIAGNOSTIC
if (target == CAM_TARGET_WILDCARD)
{
device_printf(slp->sl_dev, "invalid target\n");
ccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(ccb);
return;
}
#endif /* SCSI_LOW_DIAGNOSTIC */
cts = &ccb->cts;
ti = slp->sl_ti[target];
if (lun == CAM_LUN_WILDCARD)
lun = 0;
scsi = &cts->proto_specific.scsi;
spi = &cts->xport_specific.spi;
if ((spi->valid & (CTS_SPI_VALID_BUS_WIDTH |
CTS_SPI_VALID_SYNC_RATE |
CTS_SPI_VALID_SYNC_OFFSET)) != 0)
{
if (spi->valid & CTS_SPI_VALID_BUS_WIDTH) {
val = spi->bus_width;
if (val < ti->ti_width)
ti->ti_width = val;
}
if (spi->valid & CTS_SPI_VALID_SYNC_RATE) {
val = spi->sync_period;
if (val == 0 || val > ti->ti_maxsynch.period)
ti->ti_maxsynch.period = val;
}
if (spi->valid & CTS_SPI_VALID_SYNC_OFFSET) {
val = spi->sync_offset;
if (val < ti->ti_maxsynch.offset)
ti->ti_maxsynch.offset = val;
}
ti->ti_flags_valid |= SCSI_LOW_TARG_FLAGS_QUIRKS_VALID;
scsi_low_calcf_target(ti);
}
if ((spi->valid & CTS_SPI_FLAGS_DISC_ENB) != 0 ||
(scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0) {
li = scsi_low_alloc_li(ti, lun, 1);
if (spi->valid & CTS_SPI_FLAGS_DISC_ENB) {
li->li_quirks |= SCSI_LOW_DISK_DISC;
} else {
li->li_quirks &= ~SCSI_LOW_DISK_DISC;
}
if (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) {
li->li_quirks |= SCSI_LOW_DISK_QTAG;
} else {
li->li_quirks &= ~SCSI_LOW_DISK_QTAG;
}
li->li_flags_valid |= SCSI_LOW_LUN_FLAGS_QUIRKS_VALID;
scsi_low_calcf_target(ti);
scsi_low_calcf_lun(li);
if ((slp->sl_show_result & SHOW_CALCF_RES) != 0)
scsi_low_calcf_show(li);
}
ccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
}
case XPT_GET_TRAN_SETTINGS: {
struct ccb_trans_settings *cts;
u_int diskflags;
cts = &ccb->cts;
#ifdef SCSI_LOW_DIAGNOSTIC
if (target == CAM_TARGET_WILDCARD)
{
device_printf(slp->sl_dev, "invalid target\n");
ccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(ccb);
return;
}
#endif /* SCSI_LOW_DIAGNOSTIC */
ti = slp->sl_ti[target];
if (lun == CAM_LUN_WILDCARD)
lun = 0;
li = scsi_low_alloc_li(ti, lun, 1);
if (li != NULL && cts->type == CTS_TYPE_CURRENT_SETTINGS) {
struct ccb_trans_settings_scsi *scsi =
&cts->proto_specific.scsi;
struct ccb_trans_settings_spi *spi =
&cts->xport_specific.spi;
#ifdef SCSI_LOW_DIAGNOSTIC
if (li->li_flags_valid != SCSI_LOW_LUN_FLAGS_ALL_VALID)
{
ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
device_printf(slp->sl_dev,
"invalid GET_TRANS_CURRENT_SETTINGS call\n");
goto settings_out;
}
#endif /* SCSI_LOW_DIAGNOSTIC */
cts->protocol = PROTO_SCSI;
cts->protocol_version = SCSI_REV_2;
cts->transport = XPORT_SPI;
cts->transport_version = 2;
scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
diskflags = li->li_diskflags & li->li_cfgflags;
if (diskflags & SCSI_LOW_DISK_DISC)
spi->flags |= CTS_SPI_FLAGS_DISC_ENB;
if (diskflags & SCSI_LOW_DISK_QTAG)
scsi->flags |= CTS_SCSI_FLAGS_TAG_ENB;
spi->sync_period = ti->ti_maxsynch.period;
spi->valid |= CTS_SPI_VALID_SYNC_RATE;
spi->sync_offset = ti->ti_maxsynch.offset;
spi->valid |= CTS_SPI_VALID_SYNC_OFFSET;
spi->valid |= CTS_SPI_VALID_BUS_WIDTH;
spi->bus_width = ti->ti_width;
if (cts->ccb_h.target_lun != CAM_LUN_WILDCARD) {
scsi->valid = CTS_SCSI_VALID_TQ;
spi->valid |= CTS_SPI_VALID_DISC;
} else
scsi->valid = 0;
} else
ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
settings_out:
xpt_done(ccb);
break;
}
case XPT_CALC_GEOMETRY: { /* not yet HN2 */
cam_calc_geometry(&ccb->ccg, /*extended*/1);
xpt_done(ccb);
break;
}
case XPT_RESET_BUS: /* Reset the specified SCSI bus */
scsi_low_restart(slp, SCSI_LOW_RESTART_HARD, NULL);
ccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
case XPT_TERM_IO: /* Terminate the I/O process */
ccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(ccb);
break;
case XPT_RESET_DEV: /* Bus Device Reset the specified SCSI device */
#ifdef SCSI_LOW_DIAGNOSTIC
if (target == CAM_TARGET_WILDCARD)
{
device_printf(slp->sl_dev, "invalid target\n");
ccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(ccb);
return;
}
#endif /* SCSI_LOW_DIAGNOSTIC */
msg = SCSI_LOW_MSG_RESET;
if (((cb = SCSI_LOW_ALLOC_CCB(1)) == NULL))
{
ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
xpt_done(ccb);
return;
}
ti = slp->sl_ti[target];
if (lun == CAM_LUN_WILDCARD)
lun = 0;
cb->osdep = ccb;
cb->bp = NULL;
if ((ccb->ccb_h.flags & CAM_DIS_AUTOSENSE) == 0)
flags = CCB_AUTOSENSE | CCB_NORETRY | CCB_URGENT;
else
flags = CCB_NORETRY | CCB_URGENT;
li = scsi_low_alloc_li(ti, lun, 1);
scsi_low_enqueue(slp, ti, li, cb, flags, msg);
break;
case XPT_PATH_INQ: { /* Path routing inquiry */
struct ccb_pathinq *cpi = &ccb->cpi;
cpi->version_num = scsi_low_version_major;
cpi->hba_inquiry = PI_TAG_ABLE | PI_LINKED_CDB;
ti = slp->sl_ti[slp->sl_hostid]; /* host id */
if (ti->ti_width > SCSI_LOW_BUS_WIDTH_8)
cpi->hba_inquiry |= PI_WIDE_16;
if (ti->ti_width > SCSI_LOW_BUS_WIDTH_16)
cpi->hba_inquiry |= PI_WIDE_32;
if (ti->ti_maxsynch.offset > 0)
cpi->hba_inquiry |= PI_SDTR_ABLE;
cpi->target_sprt = 0;
cpi->hba_misc = 0;
cpi->hba_eng_cnt = 0;
cpi->max_target = slp->sl_ntargs - 1;
cpi->max_lun = slp->sl_nluns - 1;
cpi->initiator_id = slp->sl_hostid;
cpi->bus_id = cam_sim_bus(sim);
cpi->base_transfer_speed = 3300;
cpi->transport = XPORT_SPI;
cpi->transport_version = 2;
cpi->protocol = PROTO_SCSI;
cpi->protocol_version = SCSI_REV_2;
strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
strncpy(cpi->hba_vid, "SCSI_LOW", HBA_IDLEN);
strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
cpi->unit_number = cam_sim_unit(sim);
cpi->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
}
default:
printf("scsi_low: non support func_code = %d ",
ccb->ccb_h.func_code);
ccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(ccb);
break;
}
}
static int
scsi_low_attach_cam(slp)
struct scsi_low_softc *slp;
{
struct cam_devq *devq;
int tagged_openings;
devq = cam_simq_alloc(SCSI_LOW_NCCB);
if (devq == NULL)
return (ENOMEM);
/*
* ask the adapter what subunits are present
*/
tagged_openings = min(slp->sl_openings, SCSI_LOW_MAXNEXUS);
slp->sl_sim = cam_sim_alloc(scsi_low_scsi_action_cam,
scsi_low_poll_cam,
device_get_name(slp->sl_dev), slp,
device_get_unit(slp->sl_dev), &slp->sl_lock,
slp->sl_openings, tagged_openings, devq);
if (slp->sl_sim == NULL) {
cam_simq_free(devq);
return ENODEV;
}
SCSI_LOW_LOCK(slp);
if (xpt_bus_register(slp->sl_sim, slp->sl_dev, 0) != CAM_SUCCESS) {
cam_sim_free(slp->sl_sim, TRUE);
SCSI_LOW_UNLOCK(slp);
return ENODEV;
}
if (xpt_create_path(&slp->sl_path, /*periph*/NULL,
cam_sim_path(slp->sl_sim), CAM_TARGET_WILDCARD,
CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
xpt_bus_deregister(cam_sim_path(slp->sl_sim));
cam_sim_free(slp->sl_sim, /*free_simq*/TRUE);
SCSI_LOW_UNLOCK(slp);
return ENODEV;
}
slp->sl_show_result = SHOW_CALCF_RES; /* OK ? */
SCSI_LOW_UNLOCK(slp);
return 0;
}
static int
scsi_low_detach_cam(slp)
struct scsi_low_softc *slp;
{
xpt_async(AC_LOST_DEVICE, slp->sl_path, NULL);
xpt_free_path(slp->sl_path);
xpt_bus_deregister(cam_sim_path(slp->sl_sim));
cam_sim_free(slp->sl_sim, /* free_devq */ TRUE);
return 0;
}
static int
scsi_low_ccb_setup_cam(slp, cb)
struct scsi_low_softc *slp;
struct slccb *cb;
{
union ccb *ccb = (union ccb *) cb->osdep;
if ((cb->ccb_flags & CCB_SCSIIO) != 0)
{
cb->ccb_scp.scp_cmd = ccb->csio.cdb_io.cdb_bytes;
cb->ccb_scp.scp_cmdlen = (int) ccb->csio.cdb_len;
cb->ccb_scp.scp_data = ccb->csio.data_ptr;
cb->ccb_scp.scp_datalen = (int) ccb->csio.dxfer_len;
if((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT)
cb->ccb_scp.scp_direction = SCSI_LOW_WRITE;
else /* if((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) */
cb->ccb_scp.scp_direction = SCSI_LOW_READ;
cb->ccb_tcmax = ccb->ccb_h.timeout / 1000;
}
else
{
scsi_low_unit_ready_cmd(cb);
}
return SCSI_LOW_START_QTAG;
}
static int
scsi_low_done_cam(slp, cb)
struct scsi_low_softc *slp;
struct slccb *cb;
{
union ccb *ccb;
ccb = (union ccb *) cb->osdep;
if (cb->ccb_error == 0)
{
ccb->ccb_h.status = CAM_REQ_CMP;
ccb->csio.resid = 0;
}
else
{
if (cb->ccb_rcnt >= slp->sl_max_retry)
cb->ccb_error |= ABORTIO;
if ((cb->ccb_flags & CCB_NORETRY) == 0 &&
(cb->ccb_error & ABORTIO) == 0)
return EJUSTRETURN;
if ((cb->ccb_error & SENSEIO) != 0)
{
memcpy(&ccb->csio.sense_data,
&cb->ccb_sense,
sizeof(ccb->csio.sense_data));
}
ccb->ccb_h.status = scsi_low_translate_error_code(cb,
&scsi_low_error_code_cam[0]);
#ifdef SCSI_LOW_DIAGNOSTIC
if ((cb->ccb_flags & CCB_SILENT) == 0 &&
cb->ccb_scp.scp_cmdlen > 0 &&
(scsi_low_cmd_flags[cb->ccb_scp.scp_cmd[0]] &
SCSI_LOW_CMD_ABORT_WARNING) != 0)
{
device_printf(slp->sl_dev,
"WARNING: scsi_low IO abort\n");
scsi_low_print(slp, NULL);
}
#endif /* SCSI_LOW_DIAGNOSTIC */
}
if ((ccb->ccb_h.status & CAM_STATUS_MASK) == 0)
ccb->ccb_h.status |= CAM_REQ_CMP_ERR;
if (cb->ccb_scp.scp_status == ST_UNKNOWN)
ccb->csio.scsi_status = 0; /* XXX */
else
ccb->csio.scsi_status = cb->ccb_scp.scp_status;
if ((cb->ccb_flags & CCB_NOSDONE) == 0)
xpt_done(ccb);
return 0;
}
/**************************************************************
* scsi low deactivate and activate
**************************************************************/
int
scsi_low_is_busy(slp)
struct scsi_low_softc *slp;
{
if (slp->sl_nio > 0)
return EBUSY;
return 0;
}
int
scsi_low_deactivate(slp)
struct scsi_low_softc *slp;
{
slp->sl_flags |= HW_INACTIVE;
callout_stop(&slp->sl_timeout_timer);
callout_stop(&slp->sl_engage_timer);
return 0;
}
int
scsi_low_activate(slp)
struct scsi_low_softc *slp;
{
int error;
slp->sl_flags &= ~HW_INACTIVE;
if ((error = scsi_low_restart(slp, SCSI_LOW_RESTART_HARD, NULL)) != 0)
{
slp->sl_flags |= HW_INACTIVE;
return error;
}
slp->sl_timeout_count = 0;
callout_reset(&slp->sl_timeout_timer, hz / SCSI_LOW_TIMEOUT_HZ,
scsi_low_timeout, slp);
return 0;
}
/**************************************************************
* scsi low log
**************************************************************/
#ifdef SCSI_LOW_DIAGNOSTIC
static void scsi_low_msg_log_init(struct scsi_low_msg_log *);
static void scsi_low_msg_log_write(struct scsi_low_msg_log *, u_int8_t *, int);
static void scsi_low_msg_log_show(struct scsi_low_msg_log *, char *, int);
static void
scsi_low_msg_log_init(slmlp)
struct scsi_low_msg_log *slmlp;
{
slmlp->slml_ptr = 0;
}
static void
scsi_low_msg_log_write(slmlp, datap, len)
struct scsi_low_msg_log *slmlp;
u_int8_t *datap;
int len;
{
int ptr, ind;
if (slmlp->slml_ptr >= SCSI_LOW_MSG_LOG_DATALEN)
return;
ptr = slmlp->slml_ptr ++;
for (ind = 0; ind < sizeof(slmlp->slml_msg[0]) && ind < len; ind ++)
slmlp->slml_msg[ptr].msg[ind] = datap[ind];
for ( ; ind < sizeof(slmlp->slml_msg[0]); ind ++)
slmlp->slml_msg[ptr].msg[ind] = 0;
}
static void
scsi_low_msg_log_show(slmlp, s, len)
struct scsi_low_msg_log *slmlp;
char *s;
int len;
{
int ptr, ind;
printf("%s: (%d) ", s, slmlp->slml_ptr);
for (ptr = 0; ptr < slmlp->slml_ptr; ptr ++)
{
for (ind = 0; ind < len && ind < sizeof(slmlp->slml_msg[0]);
ind ++)
{
printf("[%x]", (u_int) slmlp->slml_msg[ptr].msg[ind]);
}
printf(">");
}
printf("\n");
}
#endif /* SCSI_LOW_DIAGNOSTIC */
/**************************************************************
* power control
**************************************************************/
static void
scsi_low_engage(arg)
void *arg;
{
struct scsi_low_softc *slp = arg;
SCSI_LOW_ASSERT_LOCKED(slp);
switch (slp->sl_rstep)
{
case 0:
slp->sl_rstep ++;
(*slp->sl_funcs->scsi_low_power) (slp, SCSI_LOW_ENGAGE);
callout_reset(&slp->sl_engage_timer, hz / 1000,
scsi_low_engage, slp);
break;
case 1:
slp->sl_rstep ++;
slp->sl_flags &= ~HW_RESUME;
scsi_low_start(slp);
break;
case 2:
break;
}
}
static int
scsi_low_init(slp, flags)
struct scsi_low_softc *slp;
u_int flags;
{
int rv = 0;
slp->sl_flags |= HW_INITIALIZING;
/* clear power control timeout */
if ((slp->sl_flags & HW_POWERCTRL) != 0)
{
callout_stop(&slp->sl_engage_timer);
slp->sl_flags &= ~(HW_POWDOWN | HW_RESUME);
slp->sl_active = 1;
slp->sl_powc = SCSI_LOW_POWDOWN_TC;
}
/* reset current nexus */
scsi_low_reset_nexus(slp, flags);
if ((slp->sl_flags & HW_INACTIVE) != 0)
{
rv = EBUSY;
goto out;
}
if (flags != SCSI_LOW_RESTART_SOFT)
{
rv = ((*slp->sl_funcs->scsi_low_init) (slp, flags));
}
out:
slp->sl_flags &= ~HW_INITIALIZING;
return rv;
}
/**************************************************************
* allocate lun_info
**************************************************************/
static struct lun_info *
scsi_low_alloc_li(ti, lun, alloc)
struct targ_info *ti;
int lun;
int alloc;
{
struct scsi_low_softc *slp = ti->ti_sc;
struct lun_info *li;
li = LIST_FIRST(&ti->ti_litab);
if (li != NULL)
{
if (li->li_lun == lun)
return li;
while ((li = LIST_NEXT(li, lun_chain)) != NULL)
{
if (li->li_lun == lun)
{
LIST_REMOVE(li, lun_chain);
LIST_INSERT_HEAD(&ti->ti_litab, li, lun_chain);
return li;
}
}
}
if (alloc == 0)
return li;
li = SCSI_LOW_MALLOC(ti->ti_lunsize);
if (li == NULL)
panic("no lun info mem");
bzero(li, ti->ti_lunsize);
li->li_lun = lun;
li->li_ti = ti;
li->li_cfgflags = SCSI_LOW_SYNC | SCSI_LOW_LINK | SCSI_LOW_DISC |
SCSI_LOW_QTAG;
li->li_quirks = li->li_diskflags = SCSI_LOW_DISK_LFLAGS;
li->li_flags_valid = SCSI_LOW_LUN_FLAGS_USER_VALID;
#ifdef SCSI_LOW_FLAGS_QUIRKS_OK
li->li_flags_valid |= SCSI_LOW_LUN_FLAGS_QUIRKS_VALID;
#endif /* SCSI_LOW_FLAGS_QUIRKS_OK */
li->li_qtagbits = (u_int) -1;
TAILQ_INIT(&li->li_discq);
LIST_INSERT_HEAD(&ti->ti_litab, li, lun_chain);
/* host specific structure initialization per lun */
if (slp->sl_funcs->scsi_low_lun_init != NULL)
(*slp->sl_funcs->scsi_low_lun_init)
(slp, ti, li, SCSI_LOW_INFO_ALLOC);
scsi_low_calcf_lun(li);
return li;
}
/**************************************************************
* allocate targ_info
**************************************************************/
static struct targ_info *
scsi_low_alloc_ti(slp, targ)
struct scsi_low_softc *slp;
int targ;
{
struct targ_info *ti;
if (TAILQ_FIRST(&slp->sl_titab) == NULL)
TAILQ_INIT(&slp->sl_titab);
ti = SCSI_LOW_MALLOC(slp->sl_targsize);
if (ti == NULL)
panic("%s short of memory", device_get_nameunit(slp->sl_dev));
bzero(ti, slp->sl_targsize);
ti->ti_id = targ;
ti->ti_sc = slp;
slp->sl_ti[targ] = ti;
TAILQ_INSERT_TAIL(&slp->sl_titab, ti, ti_chain);
LIST_INIT(&ti->ti_litab);
ti->ti_quirks = ti->ti_diskflags = SCSI_LOW_DISK_TFLAGS;
ti->ti_owidth = SCSI_LOW_BUS_WIDTH_8;
ti->ti_flags_valid = SCSI_LOW_TARG_FLAGS_USER_VALID;
#ifdef SCSI_LOW_FLAGS_QUIRKS_OK
ti->ti_flags_valid |= SCSI_LOW_TARG_FLAGS_QUIRKS_VALID;
#endif /* SCSI_LOW_FLAGS_QUIRKS_OK */
if (slp->sl_funcs->scsi_low_targ_init != NULL)
{
(*slp->sl_funcs->scsi_low_targ_init)
(slp, ti, SCSI_LOW_INFO_ALLOC);
}
scsi_low_calcf_target(ti);
return ti;
}
static void
scsi_low_free_ti(slp)
struct scsi_low_softc *slp;
{
struct targ_info *ti, *tib;
struct lun_info *li, *nli;
for (ti = TAILQ_FIRST(&slp->sl_titab); ti; ti = tib)
{
for (li = LIST_FIRST(&ti->ti_litab); li != NULL; li = nli)
{
if (slp->sl_funcs->scsi_low_lun_init != NULL)
{
(*slp->sl_funcs->scsi_low_lun_init)
(slp, ti, li, SCSI_LOW_INFO_DEALLOC);
}
nli = LIST_NEXT(li, lun_chain);
SCSI_LOW_FREE(li);
}
if (slp->sl_funcs->scsi_low_targ_init != NULL)
{
(*slp->sl_funcs->scsi_low_targ_init)
(slp, ti, SCSI_LOW_INFO_DEALLOC);
}
tib = TAILQ_NEXT(ti, ti_chain);
SCSI_LOW_FREE(ti);
}
}
/**************************************************************
* timeout
**************************************************************/
void
scsi_low_bus_idle(slp)
struct scsi_low_softc *slp;
{
slp->sl_retry_sel = 0;
if (slp->sl_Tnexus == NULL)
scsi_low_start(slp);
}
static void
scsi_low_timeout(arg)
void *arg;
{
struct scsi_low_softc *slp = arg;
SCSI_LOW_ASSERT_LOCKED(slp);
(void) scsi_low_timeout_check(slp);
callout_schedule(&slp->sl_timeout_timer, hz / SCSI_LOW_TIMEOUT_HZ);
}
static int
scsi_low_timeout_check(slp)
struct scsi_low_softc *slp;
{
struct targ_info *ti;
struct lun_info *li;
struct slccb *cb = NULL; /* XXX */
/* selection restart */
if (slp->sl_retry_sel != 0)
{
slp->sl_retry_sel = 0;
if (slp->sl_Tnexus != NULL)
goto step1;
cb = TAILQ_FIRST(&slp->sl_start);
if (cb == NULL)
goto step1;
if (cb->ccb_selrcnt >= SCSI_LOW_MAX_SELECTION_RETRY)
{
cb->ccb_flags |= CCB_NORETRY;
cb->ccb_error |= SELTIMEOUTIO;
if (scsi_low_revoke_ccb(slp, cb, 1) != NULL)
panic("%s: ccb not finished",
device_get_nameunit(slp->sl_dev));
}
if (slp->sl_Tnexus == NULL)
scsi_low_start(slp);
}
/* call hardware timeout */
step1:
if (slp->sl_funcs->scsi_low_timeout != NULL)
{
(*slp->sl_funcs->scsi_low_timeout) (slp);
}
if (slp->sl_timeout_count ++ <
SCSI_LOW_TIMEOUT_CHECK_INTERVAL * SCSI_LOW_TIMEOUT_HZ)
return 0;
slp->sl_timeout_count = 0;
if (slp->sl_nio > 0)
{
if ((cb = slp->sl_Qnexus) != NULL)
{
cb->ccb_tc -= SCSI_LOW_TIMEOUT_CHECK_INTERVAL;
if (cb->ccb_tc < 0)
goto bus_reset;
}
else if (slp->sl_disc == 0)
{
if ((cb = TAILQ_FIRST(&slp->sl_start)) == NULL)
return 0;
cb->ccb_tc -= SCSI_LOW_TIMEOUT_CHECK_INTERVAL;
if (cb->ccb_tc < 0)
goto bus_reset;
}
else for (ti = TAILQ_FIRST(&slp->sl_titab); ti != NULL;
ti = TAILQ_NEXT(ti, ti_chain))
{
if (ti->ti_disc == 0)
continue;
for (li = LIST_FIRST(&ti->ti_litab); li != NULL;
li = LIST_NEXT(li, lun_chain))
{
for (cb = TAILQ_FIRST(&li->li_discq);
cb != NULL;
cb = TAILQ_NEXT(cb, ccb_chain))
{
cb->ccb_tc -=
SCSI_LOW_TIMEOUT_CHECK_INTERVAL;
if (cb->ccb_tc < 0)
goto bus_reset;
}
}
}
}
else if ((slp->sl_flags & HW_POWERCTRL) != 0)
{
if ((slp->sl_flags & (HW_POWDOWN | HW_RESUME)) != 0)
return 0;
if (slp->sl_active != 0)
{
slp->sl_powc = SCSI_LOW_POWDOWN_TC;
slp->sl_active = 0;
return 0;
}
slp->sl_powc --;
if (slp->sl_powc < 0)
{
slp->sl_powc = SCSI_LOW_POWDOWN_TC;
slp->sl_flags |= HW_POWDOWN;
(*slp->sl_funcs->scsi_low_power)
(slp, SCSI_LOW_POWDOWN);
}
}
return 0;
bus_reset:
cb->ccb_error |= TIMEOUTIO;
device_printf(slp->sl_dev, "slccb (0x%lx) timeout!\n", (u_long) cb);
scsi_low_info(slp, NULL, "scsi bus hangup. try to recover.");
scsi_low_init(slp, SCSI_LOW_RESTART_HARD);
scsi_low_start(slp);
return ERESTART;
}
static int
scsi_low_abort_ccb(slp, cb)
struct scsi_low_softc *slp;
struct slccb *cb;
{
struct targ_info *ti;
struct lun_info *li;
u_int msg;
if (cb == NULL)
return EINVAL;
if ((cb->ccb_omsgoutflag &
(SCSI_LOW_MSG_ABORT | SCSI_LOW_MSG_ABORT_QTAG)) != 0)
return EBUSY;
ti = cb->ti;
li = cb->li;
if (cb->ccb_tag == SCSI_LOW_UNKTAG)
msg = SCSI_LOW_MSG_ABORT;
else
msg = SCSI_LOW_MSG_ABORT_QTAG;
cb->ccb_error |= ABORTIO;
cb->ccb_flags |= CCB_NORETRY;
scsi_low_ccb_message_assert(cb, msg);
if (cb == slp->sl_Qnexus)
{
scsi_low_assert_msg(slp, ti, msg, 1);
}
else if ((cb->ccb_flags & CCB_DISCQ) != 0)
{
if (scsi_low_revoke_ccb(slp, cb, 0) == NULL)
panic("%s: revoked ccb done",
device_get_nameunit(slp->sl_dev));
cb->ccb_flags |= CCB_STARTQ;
TAILQ_INSERT_HEAD(&slp->sl_start, cb, ccb_chain);
if (slp->sl_Tnexus == NULL)
scsi_low_start(slp);
}
else
{
if (scsi_low_revoke_ccb(slp, cb, 1) != NULL)
panic("%s: revoked ccb retried",
device_get_nameunit(slp->sl_dev));
}
return 0;
}
/**************************************************************
* Generic SCSI INTERFACE
**************************************************************/
int
scsi_low_attach(slp, openings, ntargs, nluns, targsize, lunsize)
struct scsi_low_softc *slp;
int openings, ntargs, nluns, targsize, lunsize;
{
struct targ_info *ti;
struct lun_info *li;
int i, nccb, rv;
if (ntargs > SCSI_LOW_NTARGETS)
{
printf("scsi_low: %d targets are too large\n", ntargs);
printf("change kernel options SCSI_LOW_NTARGETS");
return EINVAL;
}
if (openings <= 0)
slp->sl_openings = (SCSI_LOW_NCCB / ntargs);
else
slp->sl_openings = openings;
slp->sl_ntargs = ntargs;
slp->sl_nluns = nluns;
slp->sl_max_retry = SCSI_LOW_MAX_RETRY;
if (lunsize < sizeof(struct lun_info))
lunsize = sizeof(struct lun_info);
if (targsize < sizeof(struct targ_info))
targsize = sizeof(struct targ_info);
slp->sl_targsize = targsize;
for (i = 0; i < ntargs; i ++)
{
ti = scsi_low_alloc_ti(slp, i);
ti->ti_lunsize = lunsize;
li = scsi_low_alloc_li(ti, 0, 1);
}
/* initialize queue */
nccb = openings * ntargs;
if (nccb >= SCSI_LOW_NCCB || nccb <= 0)
nccb = SCSI_LOW_NCCB;
scsi_low_init_ccbque(nccb);
TAILQ_INIT(&slp->sl_start);
/* call os depend attach */
rv = scsi_low_attach_cam(slp);
if (rv != 0)
{
device_printf(slp->sl_dev,
"scsi_low_attach: osdep attach failed\n");
return (rv);
}
/* check hardware */
DELAY(1000); /* wait for 1ms */
SCSI_LOW_LOCK(slp);
if (scsi_low_init(slp, SCSI_LOW_RESTART_HARD) != 0)
{
device_printf(slp->sl_dev,
"scsi_low_attach: initialization failed\n");
SCSI_LOW_UNLOCK(slp);
return EINVAL;
}
/* start watch dog */
slp->sl_timeout_count = 0;
callout_reset(&slp->sl_timeout_timer, hz / SCSI_LOW_TIMEOUT_HZ,
scsi_low_timeout, slp);
mtx_lock(&sl_tab_lock);
LIST_INSERT_HEAD(&sl_tab, slp, sl_chain);
mtx_unlock(&sl_tab_lock);
/* fake call */
scsi_low_abort_ccb(slp, scsi_low_find_ccb(slp, 0, 0, NULL));
#ifdef SCSI_LOW_START_UP_CHECK
/* probing devices */
scsi_low_start_up(slp);
#endif /* SCSI_LOW_START_UP_CHECK */
SCSI_LOW_UNLOCK(slp);
return 0;
}
int
scsi_low_detach(slp)
struct scsi_low_softc *slp;
{
int rv;
SCSI_LOW_LOCK(slp);
if (scsi_low_is_busy(slp) != 0)
{
SCSI_LOW_UNLOCK(slp);
return EBUSY;
}
scsi_low_deactivate(slp);
rv = scsi_low_detach_cam(slp);
if (rv != 0)
{
SCSI_LOW_UNLOCK(slp);
return EBUSY;
}
scsi_low_free_ti(slp);
SCSI_LOW_UNLOCK(slp);
callout_drain(&slp->sl_timeout_timer);
callout_drain(&slp->sl_engage_timer);
mtx_lock(&sl_tab_lock);
LIST_REMOVE(slp, sl_chain);
mtx_unlock(&sl_tab_lock);
return 0;
}
/**************************************************************
* Generic enqueue
**************************************************************/
static int
scsi_low_enqueue(slp, ti, li, cb, flags, msg)
struct scsi_low_softc *slp;
struct targ_info *ti;
struct lun_info *li;
struct slccb *cb;
u_int flags, msg;
{
cb->ti = ti;
cb->li = li;
scsi_low_ccb_message_assert(cb, msg);
cb->ccb_otag = cb->ccb_tag = SCSI_LOW_UNKTAG;
scsi_low_alloc_qtag(cb);
cb->ccb_flags = flags | CCB_STARTQ;
cb->ccb_tc = cb->ccb_tcmax = SCSI_LOW_MIN_TOUT;
cb->ccb_error |= PENDINGIO;
if ((flags & CCB_URGENT) != 0)
{
TAILQ_INSERT_HEAD(&slp->sl_start, cb, ccb_chain);
}
else
{
TAILQ_INSERT_TAIL(&slp->sl_start, cb, ccb_chain);
}
slp->sl_nio ++;
if (slp->sl_Tnexus == NULL)
scsi_low_start(slp);
return 0;
}
static int
scsi_low_message_enqueue(slp, ti, li, flags)
struct scsi_low_softc *slp;
struct targ_info *ti;
struct lun_info *li;
u_int flags;
{
struct slccb *cb;
u_int tmsgflags;
tmsgflags = ti->ti_setup_msg;
ti->ti_setup_msg = 0;
flags |= CCB_NORETRY;
if ((cb = SCSI_LOW_ALLOC_CCB(1)) == NULL)
return ENOMEM;
cb->osdep = NULL;
cb->bp = NULL;
scsi_low_enqueue(slp, ti, li, cb, flags, tmsgflags);
return 0;
}
/**************************************************************
* Generic Start & Done
**************************************************************/
#define SLSC_MODE_SENSE_SHORT 0x1a
static u_int8_t ss_cmd[6] = {START_STOP, 0, 0, 0, SSS_START, 0};
static u_int8_t sms_cmd[6] = {SLSC_MODE_SENSE_SHORT, 0x08, 0x0a, 0,
sizeof(struct scsi_low_mode_sense_data), 0};
static u_int8_t inq_cmd[6] = {INQUIRY, 0, 0, 0,
sizeof(struct scsi_low_inq_data), 0};
static u_int8_t unit_ready_cmd[6];
static int scsi_low_setup_start(struct scsi_low_softc *, struct targ_info *, struct lun_info *, struct slccb *);
static int scsi_low_sense_abort_start(struct scsi_low_softc *, struct targ_info *, struct lun_info *, struct slccb *);
static int scsi_low_resume(struct scsi_low_softc *);
static void
scsi_low_unit_ready_cmd(cb)
struct slccb *cb;
{
cb->ccb_scp.scp_cmd = unit_ready_cmd;
cb->ccb_scp.scp_cmdlen = sizeof(unit_ready_cmd);
cb->ccb_scp.scp_datalen = 0;
cb->ccb_scp.scp_direction = SCSI_LOW_READ;
cb->ccb_tcmax = 15;
}
static int
scsi_low_sense_abort_start(slp, ti, li, cb)
struct scsi_low_softc *slp;
struct targ_info *ti;
struct lun_info *li;
struct slccb *cb;
{
cb->ccb_scp.scp_cmdlen = 6;
bzero(cb->ccb_scsi_cmd, cb->ccb_scp.scp_cmdlen);
cb->ccb_scsi_cmd[0] = REQUEST_SENSE;
cb->ccb_scsi_cmd[4] = sizeof(cb->ccb_sense);
cb->ccb_scp.scp_cmd = cb->ccb_scsi_cmd;
cb->ccb_scp.scp_data = (u_int8_t *) &cb->ccb_sense;
cb->ccb_scp.scp_datalen = sizeof(cb->ccb_sense);
cb->ccb_scp.scp_direction = SCSI_LOW_READ;
cb->ccb_tcmax = 15;
scsi_low_ccb_message_clear(cb);
if ((cb->ccb_flags & CCB_CLEARQ) != 0)
{
scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ABORT, 0);
}
else
{
bzero(&cb->ccb_sense, sizeof(cb->ccb_sense));
#ifdef SCSI_LOW_NEGOTIATE_BEFORE_SENSE
scsi_low_assert_msg(slp, ti, ti->ti_setup_msg_done, 0);
#endif /* SCSI_LOW_NEGOTIATE_BEFORE_SENSE */
}
return SCSI_LOW_START_NO_QTAG;
}
static int
scsi_low_setup_start(slp, ti, li, cb)
struct scsi_low_softc *slp;
struct targ_info *ti;
struct lun_info *li;
struct slccb *cb;
{
switch(li->li_state)
{
case SCSI_LOW_LUN_SLEEP:
scsi_low_unit_ready_cmd(cb);
break;
case SCSI_LOW_LUN_START:
cb->ccb_scp.scp_cmd = ss_cmd;
cb->ccb_scp.scp_cmdlen = sizeof(ss_cmd);
cb->ccb_scp.scp_datalen = 0;
cb->ccb_scp.scp_direction = SCSI_LOW_READ;
cb->ccb_tcmax = 30;
break;
case SCSI_LOW_LUN_INQ:
cb->ccb_scp.scp_cmd = inq_cmd;
cb->ccb_scp.scp_cmdlen = sizeof(inq_cmd);
cb->ccb_scp.scp_data = (u_int8_t *)&li->li_inq;
cb->ccb_scp.scp_datalen = sizeof(li->li_inq);
cb->ccb_scp.scp_direction = SCSI_LOW_READ;
cb->ccb_tcmax = 15;
break;
case SCSI_LOW_LUN_MODEQ:
cb->ccb_scp.scp_cmd = sms_cmd;
cb->ccb_scp.scp_cmdlen = sizeof(sms_cmd);
cb->ccb_scp.scp_data = (u_int8_t *)&li->li_sms;
cb->ccb_scp.scp_datalen = sizeof(li->li_sms);
cb->ccb_scp.scp_direction = SCSI_LOW_READ;
cb->ccb_tcmax = 15;
return SCSI_LOW_START_QTAG;
default:
panic("%s: no setup phase", device_get_nameunit(slp->sl_dev));
}
return SCSI_LOW_START_NO_QTAG;
}
static int
scsi_low_resume(slp)
struct scsi_low_softc *slp;
{
if (slp->sl_flags & HW_RESUME)
return EJUSTRETURN;
slp->sl_flags &= ~HW_POWDOWN;
if (slp->sl_funcs->scsi_low_power != NULL)
{
slp->sl_flags |= HW_RESUME;
slp->sl_rstep = 0;
(*slp->sl_funcs->scsi_low_power) (slp, SCSI_LOW_ENGAGE);
callout_reset(&slp->sl_engage_timer, hz / 1000,
scsi_low_engage, slp);
return EJUSTRETURN;
}
return 0;
}
static void
scsi_low_start(slp)
struct scsi_low_softc *slp;
{
struct targ_info *ti;
struct lun_info *li;
struct slccb *cb;
int rv;
/* check hardware exists or under initializations ? */
if ((slp->sl_flags & (HW_INACTIVE | HW_INITIALIZING)) != 0)
return;
/* check hardware power up ? */
if ((slp->sl_flags & HW_POWERCTRL) != 0)
{
slp->sl_active ++;
if (slp->sl_flags & (HW_POWDOWN | HW_RESUME))
{
if (scsi_low_resume(slp) == EJUSTRETURN)
return;
}
}
/* setup nexus */
#ifdef SCSI_LOW_DIAGNOSTIC
if (slp->sl_Tnexus || slp->sl_Lnexus || slp->sl_Qnexus)
{
scsi_low_info(slp, NULL, "NEXUS INCOSISTENT");
panic("%s: inconsistent", device_get_nameunit(slp->sl_dev));
}
#endif /* SCSI_LOW_DIAGNOSTIC */
for (cb = TAILQ_FIRST(&slp->sl_start); cb != NULL;
cb = TAILQ_NEXT(cb, ccb_chain))
{
li = cb->li;
if (li->li_disc == 0)
{
goto scsi_low_cmd_start;
}
else if (li->li_nqio > 0)
{
if (li->li_nqio < li->li_maxnqio ||
(cb->ccb_flags & (CCB_SENSE | CCB_CLEARQ)) != 0)
goto scsi_low_cmd_start;
}
}
return;
scsi_low_cmd_start:
cb->ccb_flags &= ~CCB_STARTQ;
TAILQ_REMOVE(&slp->sl_start, cb, ccb_chain);
ti = cb->ti;
/* clear all error flag bits (for restart) */
cb->ccb_error = 0;
cb->ccb_datalen = -1;
cb->ccb_scp.scp_status = ST_UNKNOWN;
/* setup nexus pointer */
slp->sl_Qnexus = cb;
slp->sl_Lnexus = li;
slp->sl_Tnexus = ti;
/* initialize msgsys */
scsi_low_init_msgsys(slp, ti);
/* exec cmd */
if ((cb->ccb_flags & (CCB_SENSE | CCB_CLEARQ)) != 0)
{
/* CA state or forced abort */
rv = scsi_low_sense_abort_start(slp, ti, li, cb);
}
else if (li->li_state >= SCSI_LOW_LUN_OK)
{
cb->ccb_flags &= ~CCB_INTERNAL;
rv = scsi_low_ccb_setup_cam(slp, cb);
if (cb->ccb_msgoutflag != 0)
{
scsi_low_ccb_message_exec(slp, cb);
}
}
else
{
cb->ccb_flags |= CCB_INTERNAL;
rv = scsi_low_setup_start(slp, ti, li, cb);
}
/* allocate qtag */
#define SCSI_LOW_QTAG_OK (SCSI_LOW_QTAG | SCSI_LOW_DISC)
if (rv == SCSI_LOW_START_QTAG &&
(li->li_flags & SCSI_LOW_QTAG_OK) == SCSI_LOW_QTAG_OK &&
li->li_maxnqio > 0)
{
u_int qmsg;
scsi_low_activate_qtag(cb);
if ((scsi_low_cmd_flags[cb->ccb_scp.scp_cmd[0]] &
SCSI_LOW_CMD_ORDERED_QTAG) != 0)
qmsg = SCSI_LOW_MSG_ORDERED_QTAG;
else if ((cb->ccb_flags & CCB_URGENT) != 0)
qmsg = SCSI_LOW_MSG_HEAD_QTAG;
else
qmsg = SCSI_LOW_MSG_SIMPLE_QTAG;
scsi_low_assert_msg(slp, ti, qmsg, 0);
}
/* timeout */
if (cb->ccb_tcmax < SCSI_LOW_MIN_TOUT)
cb->ccb_tcmax = SCSI_LOW_MIN_TOUT;
cb->ccb_tc = cb->ccb_tcmax;
/* setup saved scsi data pointer */
cb->ccb_sscp = cb->ccb_scp;
/* setup current scsi pointer */
slp->sl_scp = cb->ccb_sscp;
slp->sl_error = cb->ccb_error;
/* assert always an identify msg */
scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_IDENTIFY, 0);
/* debug section */
#ifdef SCSI_LOW_DIAGNOSTIC
scsi_low_msg_log_init(&ti->ti_log_msgin);
scsi_low_msg_log_init(&ti->ti_log_msgout);
#endif /* SCSI_LOW_DIAGNOSTIC */
/* selection start */
slp->sl_selid = cb;
rv = ((*slp->sl_funcs->scsi_low_start_bus) (slp, cb));
if (rv == SCSI_LOW_START_OK)
{
#ifdef SCSI_LOW_STATICS
scsi_low_statics.nexus_win ++;
#endif /* SCSI_LOW_STATICS */
return;
}
scsi_low_arbit_fail(slp, cb);
#ifdef SCSI_LOW_STATICS
scsi_low_statics.nexus_fail ++;
#endif /* SCSI_LOW_STATICS */
}
void
scsi_low_arbit_fail(slp, cb)
struct scsi_low_softc *slp;
struct slccb *cb;
{
struct targ_info *ti = cb->ti;
scsi_low_deactivate_qtag(cb);
scsi_low_ccb_message_retry(cb);
cb->ccb_flags |= CCB_STARTQ;
TAILQ_INSERT_HEAD(&slp->sl_start, cb, ccb_chain);
scsi_low_bus_release(slp, ti);
cb->ccb_selrcnt ++;
if (slp->sl_disc == 0)
{
#ifdef SCSI_LOW_DIAGNOSTIC
device_printf(slp->sl_dev, "try selection again\n");
#endif /* SCSI_LOW_DIAGNOSTIC */
slp->sl_retry_sel = 1;
}
}
static void
scsi_low_bus_release(slp, ti)
struct scsi_low_softc *slp;
struct targ_info *ti;
{
if (ti->ti_disc > 0)
{
SCSI_LOW_SETUP_PHASE(ti, PH_DISC);
}
else
{
SCSI_LOW_SETUP_PHASE(ti, PH_NULL);
}
/* clear all nexus pointer */
slp->sl_Qnexus = NULL;
slp->sl_Lnexus = NULL;
slp->sl_Tnexus = NULL;
/* clear selection assert */
slp->sl_selid = NULL;
/* clear nexus data */
slp->sl_scp.scp_direction = SCSI_LOW_RWUNK;
/* clear phase change counter */
slp->sl_ph_count = 0;
}
static int
scsi_low_setup_done(slp, cb)
struct scsi_low_softc *slp;
struct slccb *cb;
{
struct targ_info *ti;
struct lun_info *li;
ti = cb->ti;
li = cb->li;
if (cb->ccb_rcnt >= slp->sl_max_retry)
{
cb->ccb_error |= ABORTIO;
return SCSI_LOW_DONE_COMPLETE;
}
/* XXX: special huck for selection timeout */
if (li->li_state == SCSI_LOW_LUN_SLEEP &&
(cb->ccb_error & SELTIMEOUTIO) != 0)
{
cb->ccb_error |= ABORTIO;
return SCSI_LOW_DONE_COMPLETE;
}
switch(li->li_state)
{
case SCSI_LOW_LUN_INQ:
if (cb->ccb_error != 0)
{
li->li_diskflags &=
~(SCSI_LOW_DISK_LINK | SCSI_LOW_DISK_QTAG);
if (li->li_lun > 0)
goto resume;
ti->ti_diskflags &=
~(SCSI_LOW_DISK_SYNC | SCSI_LOW_DISK_WIDE);
}
else if ((li->li_inq.sd_version & 7) >= 2 ||
(li->li_inq.sd_len >= 4))
{
if ((li->li_inq.sd_support & 0x2) == 0)
li->li_diskflags &= ~SCSI_LOW_DISK_QTAG;
if ((li->li_inq.sd_support & 0x8) == 0)
li->li_diskflags &= ~SCSI_LOW_DISK_LINK;
if (li->li_lun > 0)
goto resume;
if ((li->li_inq.sd_support & 0x10) == 0)
ti->ti_diskflags &= ~SCSI_LOW_DISK_SYNC;
if ((li->li_inq.sd_support & 0x20) == 0)
ti->ti_diskflags &= ~SCSI_LOW_DISK_WIDE_16;
if ((li->li_inq.sd_support & 0x40) == 0)
ti->ti_diskflags &= ~SCSI_LOW_DISK_WIDE_32;
}
else
{
li->li_diskflags &=
~(SCSI_LOW_DISK_QTAG | SCSI_LOW_DISK_LINK);
if (li->li_lun > 0)
goto resume;
ti->ti_diskflags &= ~SCSI_LOW_DISK_WIDE;
}
ti->ti_flags_valid |= SCSI_LOW_TARG_FLAGS_DISK_VALID;
resume:
scsi_low_calcf_target(ti);
scsi_low_calcf_lun(li);
break;
case SCSI_LOW_LUN_MODEQ:
if (cb->ccb_error != 0)
{
if (cb->ccb_error & SENSEIO)
{
#ifdef SCSI_LOW_DEBUG
if (scsi_low_debug & SCSI_LOW_DEBUG_SENSE)
{
int error_code, sense_key, asc, ascq;
scsi_extract_sense(&cb->ccb_sense,
&error_code,
&sense_key,
&asc,
&ascq);
printf("SENSE: [%x][%x][%x][%x]\n",
error_code, sense_key, asc,
ascq);
}
#endif /* SCSI_LOW_DEBUG */
}
else
{
li->li_diskflags &= ~SCSI_LOW_DISK_QTAG;
}
}
else if ((li->li_sms.sms_cmp.cmp_page & 0x3f) == 0x0a)
{
if (li->li_sms.sms_cmp.cmp_qc & 0x02)
li->li_qflags |= SCSI_LOW_QFLAG_CA_QCLEAR;
else
li->li_qflags &= ~SCSI_LOW_QFLAG_CA_QCLEAR;
if ((li->li_sms.sms_cmp.cmp_qc & 0x01) != 0)
li->li_diskflags &= ~SCSI_LOW_DISK_QTAG;
}
li->li_flags_valid |= SCSI_LOW_LUN_FLAGS_DISK_VALID;
scsi_low_calcf_lun(li);
break;
default:
break;
}
li->li_state ++;
if (li->li_state == SCSI_LOW_LUN_OK)
{
scsi_low_calcf_target(ti);
scsi_low_calcf_lun(li);
if (li->li_flags_valid == SCSI_LOW_LUN_FLAGS_ALL_VALID &&
(slp->sl_show_result & SHOW_CALCF_RES) != 0)
{
scsi_low_calcf_show(li);
}
}
cb->ccb_rcnt --;
return SCSI_LOW_DONE_RETRY;
}
static int
scsi_low_done(slp, cb)
struct scsi_low_softc *slp;
struct slccb *cb;
{
int rv;
if (cb->ccb_error == 0)
{
if ((cb->ccb_flags & (CCB_SENSE | CCB_CLEARQ)) != 0)
{
#ifdef SCSI_LOW_QCLEAR_AFTER_CA
/* XXX:
* SCSI-2 draft suggests
* page 0x0a QErr bit determins if
* the target aborts or continues
* the queueing io's after CA state resolved.
* However many targets seem not to support
* the page 0x0a. Thus we should manually clear the
* queuing io's after CA state.
*/
if ((cb->ccb_flags & CCB_CLEARQ) == 0)
{
cb->ccb_rcnt --;
cb->ccb_flags |= CCB_CLEARQ;
goto retry;
}
#endif /* SCSI_LOW_QCLEAR_AFTER_CA */
if ((cb->ccb_flags & CCB_SENSE) != 0)
cb->ccb_error |= (SENSEIO | ABORTIO);
cb->ccb_flags &= ~(CCB_SENSE | CCB_CLEARQ);
}
else switch (cb->ccb_sscp.scp_status)
{
case ST_GOOD:
case ST_MET:
case ST_INTERGOOD:
case ST_INTERMET:
if (cb->ccb_datalen == 0 ||
cb->ccb_scp.scp_datalen == 0)
break;
if (cb->ccb_scp.scp_cmdlen > 0 &&
(scsi_low_cmd_flags[cb->ccb_scp.scp_cmd[0]] &
SCSI_LOW_CMD_RESIDUAL_CHK) == 0)
break;
cb->ccb_error |= PDMAERR;
break;
case ST_BUSY:
case ST_QUEFULL:
cb->ccb_error |= (BUSYERR | STATERR);
break;
case ST_CONFLICT:
cb->ccb_error |= (STATERR | ABORTIO);
break;
case ST_CHKCOND:
case ST_CMDTERM:
if (cb->ccb_flags & (CCB_AUTOSENSE | CCB_INTERNAL))
{
cb->ccb_rcnt --;
cb->ccb_flags |= CCB_SENSE;
goto retry;
}
cb->ccb_error |= (UACAERR | STATERR | ABORTIO);
break;
case ST_UNKNOWN:
default:
cb->ccb_error |= FATALIO;
break;
}
}
else
{
if (cb->ccb_flags & CCB_SENSE)
{
cb->ccb_error |= (SENSEERR | ABORTIO);
}
cb->ccb_flags &= ~(CCB_CLEARQ | CCB_SENSE);
}
/* internal ccb */
if ((cb->ccb_flags & CCB_INTERNAL) != 0)
{
if (scsi_low_setup_done(slp, cb) == SCSI_LOW_DONE_RETRY)
goto retry;
}
/* check a ccb msgout flag */
if (cb->ccb_omsgoutflag != 0)
{
#define SCSI_LOW_MSG_ABORT_OK (SCSI_LOW_MSG_ABORT | \
SCSI_LOW_MSG_ABORT_QTAG | \
SCSI_LOW_MSG_CLEAR_QTAG | \
SCSI_LOW_MSG_TERMIO)
if ((cb->ccb_omsgoutflag & SCSI_LOW_MSG_ABORT_OK) != 0)
{
cb->ccb_error |= ABORTIO;
}
}
/* call OS depend done */
if (cb->osdep != NULL)
{
rv = scsi_low_done_cam(slp, cb);
if (rv == EJUSTRETURN)
goto retry;
}
else if (cb->ccb_error != 0)
{
if (cb->ccb_rcnt >= slp->sl_max_retry)
cb->ccb_error |= ABORTIO;
if ((cb->ccb_flags & CCB_NORETRY) == 0 &&
(cb->ccb_error & ABORTIO) == 0)
goto retry;
}
/* free our target */
#ifdef SCSI_LOW_DEBUG
if (SCSI_LOW_DEBUG_GO(SCSI_LOW_DEBUG_DONE, cb->ti->ti_id) != 0)
{
printf(">> SCSI_LOW_DONE_COMPLETE ===============\n");
scsi_low_print(slp, NULL);
}
#endif /* SCSI_LOW_DEBUG */
scsi_low_deactivate_qtag(cb);
scsi_low_dealloc_qtag(cb);
scsi_low_free_ccb(cb);
slp->sl_nio --;
return SCSI_LOW_DONE_COMPLETE;
retry:
#ifdef SCSI_LOW_DEBUG
if (SCSI_LOW_DEBUG_GO(SCSI_LOW_DEBUG_DONE, cb->ti->ti_id) != 0)
{
printf("** SCSI_LOW_DONE_RETRY ===============\n");
scsi_low_print(slp, NULL);
}
#endif /* SCSI_LOW_DEBUG */
cb->ccb_rcnt ++;
scsi_low_deactivate_qtag(cb);
scsi_low_ccb_message_retry(cb);
return SCSI_LOW_DONE_RETRY;
}
/**************************************************************
* Reset
**************************************************************/
static void
scsi_low_reset_nexus_target(slp, ti, fdone)
struct scsi_low_softc *slp;
struct targ_info *ti;
int fdone;
{
struct lun_info *li;
for (li = LIST_FIRST(&ti->ti_litab); li != NULL;
li = LIST_NEXT(li, lun_chain))
{
scsi_low_reset_nexus_lun(slp, li, fdone);
li->li_state = SCSI_LOW_LUN_SLEEP;
li->li_maxnqio = 0;
}
ti->ti_disc = 0;
ti->ti_setup_msg = 0;
ti->ti_setup_msg_done = 0;
ti->ti_osynch.offset = ti->ti_osynch.period = 0;
ti->ti_owidth = SCSI_LOW_BUS_WIDTH_8;
ti->ti_diskflags = SCSI_LOW_DISK_TFLAGS;
ti->ti_flags_valid &= ~SCSI_LOW_TARG_FLAGS_DISK_VALID;
if (slp->sl_funcs->scsi_low_targ_init != NULL)
{
((*slp->sl_funcs->scsi_low_targ_init)
(slp, ti, SCSI_LOW_INFO_REVOKE));
}
scsi_low_calcf_target(ti);
for (li = LIST_FIRST(&ti->ti_litab); li != NULL;
li = LIST_NEXT(li, lun_chain))
{
li->li_flags = 0;
li->li_diskflags = SCSI_LOW_DISK_LFLAGS;
li->li_flags_valid &= ~SCSI_LOW_LUN_FLAGS_DISK_VALID;
if (slp->sl_funcs->scsi_low_lun_init != NULL)
{
((*slp->sl_funcs->scsi_low_lun_init)
(slp, ti, li, SCSI_LOW_INFO_REVOKE));
}
scsi_low_calcf_lun(li);
}
}
static void
scsi_low_reset_nexus(slp, fdone)
struct scsi_low_softc *slp;
int fdone;
{
struct targ_info *ti;
struct slccb *cb, *topcb;
if ((cb = slp->sl_Qnexus) != NULL)
{
topcb = scsi_low_revoke_ccb(slp, cb, fdone);
}
else
{
topcb = NULL;
}
for (ti = TAILQ_FIRST(&slp->sl_titab); ti != NULL;
ti = TAILQ_NEXT(ti, ti_chain))
{
scsi_low_reset_nexus_target(slp, ti, fdone);
scsi_low_bus_release(slp, ti);
scsi_low_init_msgsys(slp, ti);
}
if (topcb != NULL)
{
topcb->ccb_flags |= CCB_STARTQ;
TAILQ_INSERT_HEAD(&slp->sl_start, topcb, ccb_chain);
}
slp->sl_disc = 0;
slp->sl_retry_sel = 0;
slp->sl_flags &= ~HW_PDMASTART;
}
/* misc */
static int tw_pos;
static char tw_chars[] = "|/-\\";
#define TWIDDLEWAIT 10000
static void
scsi_low_twiddle_wait(void)
{
cnputc('\b');
cnputc(tw_chars[tw_pos++]);
tw_pos %= (sizeof(tw_chars) - 1);
DELAY(TWIDDLEWAIT);
}
void
scsi_low_bus_reset(slp)
struct scsi_low_softc *slp;
{
int i;
(*slp->sl_funcs->scsi_low_bus_reset) (slp);
device_printf(slp->sl_dev, "try to reset scsi bus ");
for (i = 0; i <= SCSI2_RESET_DELAY / TWIDDLEWAIT ; i++)
scsi_low_twiddle_wait();
cnputc('\b');
printf("\n");
}
int
scsi_low_restart(slp, flags, s)
struct scsi_low_softc *slp;
int flags;
u_char *s;
{
int error;
if (s != NULL)
device_printf(slp->sl_dev, "scsi bus restart. reason: %s\n", s);
if ((error = scsi_low_init(slp, flags)) != 0)
return error;
scsi_low_start(slp);
return 0;
}
/**************************************************************
* disconnect and reselect
**************************************************************/
#define MSGCMD_LUN(msg) (msg & 0x07)
static struct slccb *
scsi_low_establish_ccb(ti, li, tag)
struct targ_info *ti;
struct lun_info *li;
scsi_low_tag_t tag;
{
struct scsi_low_softc *slp = ti->ti_sc;
struct slccb *cb;
if (li == NULL)
return NULL;
cb = TAILQ_FIRST(&li->li_discq);
for ( ; cb != NULL; cb = TAILQ_NEXT(cb, ccb_chain))
if (cb->ccb_tag == tag)
goto found;
return cb;
/*
* establish our ccb nexus
*/
found:
#ifdef SCSI_LOW_DEBUG
if (SCSI_LOW_DEBUG_TEST_GO(SCSI_LOW_NEXUS_CHECK, ti->ti_id) != 0)
{
device_printf(slp->sl_dev, "nexus(0x%lx) abort check start\n",
(u_long) cb);
cb->ccb_flags |= (CCB_NORETRY | CCB_SILENT);
scsi_low_revoke_ccb(slp, cb, 1);
return NULL;
}
if (SCSI_LOW_DEBUG_TEST_GO(SCSI_LOW_ATTEN_CHECK, ti->ti_id) != 0)
{
if (cb->ccb_omsgoutflag == 0)
scsi_low_ccb_message_assert(cb, SCSI_LOW_MSG_NOOP);
}
#endif /* SCSI_LOW_DEBUG */
TAILQ_REMOVE(&li->li_discq, cb, ccb_chain);
cb->ccb_flags &= ~CCB_DISCQ;
slp->sl_Qnexus = cb;
slp->sl_scp = cb->ccb_sscp;
slp->sl_error |= cb->ccb_error;
slp->sl_disc --;
ti->ti_disc --;
li->li_disc --;
/* inform "ccb nexus established" to the host driver */
(*slp->sl_funcs->scsi_low_establish_ccb_nexus) (slp);
/* check msg */
if (cb->ccb_msgoutflag != 0)
{
scsi_low_ccb_message_exec(slp, cb);
}
return cb;
}
struct targ_info *
scsi_low_reselected(slp, targ)
struct scsi_low_softc *slp;
u_int targ;
{
struct targ_info *ti;
struct slccb *cb;
u_char *s;
/*
* Check select vs reselected collision.
*/
if ((cb = slp->sl_selid) != NULL)
{
scsi_low_arbit_fail(slp, cb);
#ifdef SCSI_LOW_STATICS
scsi_low_statics.nexus_conflict ++;
#endif /* SCSI_LOW_STATICS */
}
/*
* Check if no current active nexus.
*/
if (slp->sl_Tnexus != NULL)
{
s = "host busy";
goto world_restart;
}
/*
* Check a valid target id asserted ?
*/
if (targ >= slp->sl_ntargs || targ == slp->sl_hostid)
{
s = "scsi id illegal";
goto world_restart;
}
/*
* Check the target scsi status.
*/
ti = slp->sl_ti[targ];
if (ti->ti_phase != PH_DISC && ti->ti_phase != PH_NULL)
{
s = "phase mismatch";
goto world_restart;
}
/*
* Setup init msgsys
*/
slp->sl_error = 0;
scsi_low_init_msgsys(slp, ti);
/*
* Establish our target nexus
*/
SCSI_LOW_SETUP_PHASE(ti, PH_RESEL);
slp->sl_Tnexus = ti;
#ifdef SCSI_LOW_STATICS
scsi_low_statics.nexus_reselected ++;
#endif /* SCSI_LOW_STATICS */
return ti;
world_restart:
device_printf(slp->sl_dev, "reselect(%x:unknown) %s\n", targ, s);
scsi_low_restart(slp, SCSI_LOW_RESTART_HARD,
"reselect: scsi world confused");
return NULL;
}
/**************************************************************
* cmd out pointer setup
**************************************************************/
int
scsi_low_cmd(slp, ti)
struct scsi_low_softc *slp;
struct targ_info *ti;
{
struct slccb *cb = slp->sl_Qnexus;
slp->sl_ph_count ++;
if (cb == NULL)
{
/*
* no ccb, abort!
*/
slp->sl_scp.scp_cmd = (u_int8_t *) &unit_ready_cmd;
slp->sl_scp.scp_cmdlen = sizeof(unit_ready_cmd);
slp->sl_scp.scp_datalen = 0;
slp->sl_scp.scp_direction = SCSI_LOW_READ;
slp->sl_error |= FATALIO;
scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ABORT, 0);
SCSI_LOW_INFO(slp, ti, "CMDOUT: ccb nexus not found");
return EINVAL;
}
else
{
#ifdef SCSI_LOW_DEBUG
if (SCSI_LOW_DEBUG_TEST_GO(SCSI_LOW_CMDLNK_CHECK, ti->ti_id))
{
scsi_low_test_cmdlnk(slp, cb);
}
#endif /* SCSI_LOW_DEBUG */
}
return 0;
}
/**************************************************************
* data out pointer setup
**************************************************************/
int
scsi_low_data(slp, ti, bp, direction)
struct scsi_low_softc *slp;
struct targ_info *ti;
struct buf **bp;
int direction;
{
struct slccb *cb = slp->sl_Qnexus;
if (cb != NULL && direction == cb->ccb_sscp.scp_direction)
{
*bp = cb->bp;
return 0;
}
slp->sl_error |= (FATALIO | PDMAERR);
slp->sl_scp.scp_datalen = 0;
slp->sl_scp.scp_direction = direction;
scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ABORT, 0);
if (ti->ti_ophase != ti->ti_phase)
{
char *s;
if (cb == NULL)
s = "DATA PHASE: ccb nexus not found";
else
s = "DATA PHASE: xfer direction mismatch";
SCSI_LOW_INFO(slp, ti, s);
}
*bp = NULL;
return EINVAL;
}
/**************************************************************
* MSG_SYS
**************************************************************/
#define MSGINPTR_CLR(ti) {(ti)->ti_msginptr = 0; (ti)->ti_msginlen = 0;}
#define MSGIN_PERIOD(ti) ((ti)->ti_msgin[3])
#define MSGIN_OFFSET(ti) ((ti)->ti_msgin[4])
#define MSGIN_WIDTHP(ti) ((ti)->ti_msgin[3])
#define MSGIN_DATA_LAST 0x30
static int scsi_low_errfunc_synch(struct scsi_low_softc *, u_int);
static int scsi_low_errfunc_wide(struct scsi_low_softc *, u_int);
static int scsi_low_errfunc_identify(struct scsi_low_softc *, u_int);
static int scsi_low_errfunc_qtag(struct scsi_low_softc *, u_int);
static int scsi_low_msgfunc_synch(struct scsi_low_softc *);
static int scsi_low_msgfunc_wide(struct scsi_low_softc *);
static int scsi_low_msgfunc_identify(struct scsi_low_softc *);
static int scsi_low_msgfunc_abort(struct scsi_low_softc *);
static int scsi_low_msgfunc_qabort(struct scsi_low_softc *);
static int scsi_low_msgfunc_qtag(struct scsi_low_softc *);
static int scsi_low_msgfunc_reset(struct scsi_low_softc *);
struct scsi_low_msgout_data {
u_int md_flags;
u_int8_t md_msg;
int (*md_msgfunc)(struct scsi_low_softc *);
int (*md_errfunc)(struct scsi_low_softc *, u_int);
#define MSG_RELEASE_ATN 0x0001
u_int md_condition;
};
struct scsi_low_msgout_data scsi_low_msgout_data[] = {
/* 0 */ {SCSI_LOW_MSG_RESET, MSG_RESET, scsi_low_msgfunc_reset, NULL, MSG_RELEASE_ATN},
/* 1 */ {SCSI_LOW_MSG_REJECT, MSG_REJECT, NULL, NULL, MSG_RELEASE_ATN},
/* 2 */ {SCSI_LOW_MSG_PARITY, MSG_PARITY, NULL, NULL, MSG_RELEASE_ATN},
/* 3 */ {SCSI_LOW_MSG_ERROR, MSG_I_ERROR, NULL, NULL, MSG_RELEASE_ATN},
/* 4 */ {SCSI_LOW_MSG_IDENTIFY, MSG_IDENTIFY, scsi_low_msgfunc_identify, scsi_low_errfunc_identify, 0},
/* 5 */ {SCSI_LOW_MSG_ABORT, MSG_ABORT, scsi_low_msgfunc_abort, NULL, MSG_RELEASE_ATN},
/* 6 */ {SCSI_LOW_MSG_TERMIO, MSG_TERM_IO, NULL, NULL, MSG_RELEASE_ATN},
/* 7 */ {SCSI_LOW_MSG_SIMPLE_QTAG, MSG_SIMPLE_QTAG, scsi_low_msgfunc_qtag, scsi_low_errfunc_qtag, 0},
/* 8 */ {SCSI_LOW_MSG_ORDERED_QTAG, MSG_ORDERED_QTAG, scsi_low_msgfunc_qtag, scsi_low_errfunc_qtag, 0},
/* 9 */{SCSI_LOW_MSG_HEAD_QTAG, MSG_HEAD_QTAG, scsi_low_msgfunc_qtag, scsi_low_errfunc_qtag, 0},
/* 10 */ {SCSI_LOW_MSG_ABORT_QTAG, MSG_ABORT_QTAG, scsi_low_msgfunc_qabort, NULL, MSG_RELEASE_ATN},
/* 11 */ {SCSI_LOW_MSG_CLEAR_QTAG, MSG_CLEAR_QTAG, scsi_low_msgfunc_abort, NULL, MSG_RELEASE_ATN},
/* 12 */{SCSI_LOW_MSG_WIDE, MSG_EXTEND, scsi_low_msgfunc_wide, scsi_low_errfunc_wide, MSG_RELEASE_ATN},
/* 13 */{SCSI_LOW_MSG_SYNCH, MSG_EXTEND, scsi_low_msgfunc_synch, scsi_low_errfunc_synch, MSG_RELEASE_ATN},
/* 14 */{SCSI_LOW_MSG_NOOP, MSG_NOOP, NULL, NULL, MSG_RELEASE_ATN},
/* 15 */{SCSI_LOW_MSG_ALL, 0},
};
static int scsi_low_msginfunc_ext(struct scsi_low_softc *);
static int scsi_low_synch(struct scsi_low_softc *);
static int scsi_low_wide(struct scsi_low_softc *);
static int scsi_low_msginfunc_msg_reject(struct scsi_low_softc *);
static int scsi_low_msginfunc_rejop(struct scsi_low_softc *);
static int scsi_low_msginfunc_rp(struct scsi_low_softc *);
static int scsi_low_msginfunc_sdp(struct scsi_low_softc *);
static int scsi_low_msginfunc_disc(struct scsi_low_softc *);
static int scsi_low_msginfunc_cc(struct scsi_low_softc *);
static int scsi_low_msginfunc_lcc(struct scsi_low_softc *);
static int scsi_low_msginfunc_parity(struct scsi_low_softc *);
static int scsi_low_msginfunc_noop(struct scsi_low_softc *);
static int scsi_low_msginfunc_simple_qtag(struct scsi_low_softc *);
static int scsi_low_msginfunc_i_wide_residue(struct scsi_low_softc *);
struct scsi_low_msgin_data {
u_int md_len;
int (*md_msgfunc)(struct scsi_low_softc *);
};
struct scsi_low_msgin_data scsi_low_msgin_data[] = {
/* 0 */ {1, scsi_low_msginfunc_cc},
/* 1 */ {2, scsi_low_msginfunc_ext},
/* 2 */ {1, scsi_low_msginfunc_sdp},
/* 3 */ {1, scsi_low_msginfunc_rp},
/* 4 */ {1, scsi_low_msginfunc_disc},
/* 5 */ {1, scsi_low_msginfunc_rejop},
/* 6 */ {1, scsi_low_msginfunc_rejop},
/* 7 */ {1, scsi_low_msginfunc_msg_reject},
/* 8 */ {1, scsi_low_msginfunc_noop},
/* 9 */ {1, scsi_low_msginfunc_parity},
/* a */ {1, scsi_low_msginfunc_lcc},
/* b */ {1, scsi_low_msginfunc_lcc},
/* c */ {1, scsi_low_msginfunc_rejop},
/* d */ {2, scsi_low_msginfunc_rejop},
/* e */ {1, scsi_low_msginfunc_rejop},
/* f */ {1, scsi_low_msginfunc_rejop},
/* 0x10 */ {1, scsi_low_msginfunc_rejop},
/* 0x11 */ {1, scsi_low_msginfunc_rejop},
/* 0x12 */ {1, scsi_low_msginfunc_rejop},
/* 0x13 */ {1, scsi_low_msginfunc_rejop},
/* 0x14 */ {1, scsi_low_msginfunc_rejop},
/* 0x15 */ {1, scsi_low_msginfunc_rejop},
/* 0x16 */ {1, scsi_low_msginfunc_rejop},
/* 0x17 */ {1, scsi_low_msginfunc_rejop},
/* 0x18 */ {1, scsi_low_msginfunc_rejop},
/* 0x19 */ {1, scsi_low_msginfunc_rejop},
/* 0x1a */ {1, scsi_low_msginfunc_rejop},
/* 0x1b */ {1, scsi_low_msginfunc_rejop},
/* 0x1c */ {1, scsi_low_msginfunc_rejop},
/* 0x1d */ {1, scsi_low_msginfunc_rejop},
/* 0x1e */ {1, scsi_low_msginfunc_rejop},
/* 0x1f */ {1, scsi_low_msginfunc_rejop},
/* 0x20 */ {2, scsi_low_msginfunc_simple_qtag},
/* 0x21 */ {2, scsi_low_msginfunc_rejop},
/* 0x22 */ {2, scsi_low_msginfunc_rejop},
/* 0x23 */ {2, scsi_low_msginfunc_i_wide_residue},
/* 0x24 */ {2, scsi_low_msginfunc_rejop},
/* 0x25 */ {2, scsi_low_msginfunc_rejop},
/* 0x26 */ {2, scsi_low_msginfunc_rejop},
/* 0x27 */ {2, scsi_low_msginfunc_rejop},
/* 0x28 */ {2, scsi_low_msginfunc_rejop},
/* 0x29 */ {2, scsi_low_msginfunc_rejop},
/* 0x2a */ {2, scsi_low_msginfunc_rejop},
/* 0x2b */ {2, scsi_low_msginfunc_rejop},
/* 0x2c */ {2, scsi_low_msginfunc_rejop},
/* 0x2d */ {2, scsi_low_msginfunc_rejop},
/* 0x2e */ {2, scsi_low_msginfunc_rejop},
/* 0x2f */ {2, scsi_low_msginfunc_rejop},
/* 0x30 */ {1, scsi_low_msginfunc_rejop} /* default rej op */
};
/**************************************************************
* msgout
**************************************************************/
static int
scsi_low_msgfunc_synch(slp)
struct scsi_low_softc *slp;
{
struct targ_info *ti = slp->sl_Tnexus;
int ptr = ti->ti_msgoutlen;
ti->ti_msgoutstr[ptr + 1] = MSG_EXTEND_SYNCHLEN;
ti->ti_msgoutstr[ptr + 2] = MSG_EXTEND_SYNCHCODE;
ti->ti_msgoutstr[ptr + 3] = ti->ti_maxsynch.period;
ti->ti_msgoutstr[ptr + 4] = ti->ti_maxsynch.offset;
return MSG_EXTEND_SYNCHLEN + 2;
}
static int
scsi_low_msgfunc_wide(slp)
struct scsi_low_softc *slp;
{
struct targ_info *ti = slp->sl_Tnexus;
int ptr = ti->ti_msgoutlen;
ti->ti_msgoutstr[ptr + 1] = MSG_EXTEND_WIDELEN;
ti->ti_msgoutstr[ptr + 2] = MSG_EXTEND_WIDECODE;
ti->ti_msgoutstr[ptr + 3] = ti->ti_width;
return MSG_EXTEND_WIDELEN + 2;
}
static int
scsi_low_msgfunc_identify(slp)
struct scsi_low_softc *slp;
{
struct targ_info *ti = slp->sl_Tnexus;
struct lun_info *li = slp->sl_Lnexus;
struct slccb *cb = slp->sl_Qnexus;
int ptr = ti->ti_msgoutlen;
u_int8_t msg;
msg = MSG_IDENTIFY;
if (cb == NULL)
{
slp->sl_error |= FATALIO;
scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ABORT, 0);
SCSI_LOW_INFO(slp, ti, "MSGOUT: nexus unknown");
}
else
{
if (scsi_low_is_disconnect_ok(cb) != 0)
msg |= (MSG_IDENTIFY_DISCPRIV | li->li_lun);
else
msg |= li->li_lun;
if (ti->ti_phase == PH_MSGOUT)
{
(*slp->sl_funcs->scsi_low_establish_lun_nexus) (slp);
if (cb->ccb_tag == SCSI_LOW_UNKTAG)
{
(*slp->sl_funcs->scsi_low_establish_ccb_nexus) (slp);
}
}
}
ti->ti_msgoutstr[ptr + 0] = msg;
return 1;
}
static int
scsi_low_msgfunc_abort(slp)
struct scsi_low_softc *slp;
{
SCSI_LOW_SETUP_MSGPHASE(slp, MSGPH_ABORT);
return 1;
}
static int
scsi_low_msgfunc_qabort(slp)
struct scsi_low_softc *slp;
{
SCSI_LOW_SETUP_MSGPHASE(slp, MSGPH_TERM);
return 1;
}
static int
scsi_low_msgfunc_reset(slp)
struct scsi_low_softc *slp;
{
SCSI_LOW_SETUP_MSGPHASE(slp, MSGPH_RESET);
return 1;
}
static int
scsi_low_msgfunc_qtag(slp)
struct scsi_low_softc *slp;
{
struct targ_info *ti = slp->sl_Tnexus;
struct slccb *cb = slp->sl_Qnexus;
int ptr = ti->ti_msgoutlen;
if (cb == NULL || cb->ccb_tag == SCSI_LOW_UNKTAG)
{
ti->ti_msgoutstr[ptr + 0] = MSG_NOOP;
return 1;
}
else
{
ti->ti_msgoutstr[ptr + 1] = (u_int8_t) cb->ccb_tag;
if (ti->ti_phase == PH_MSGOUT)
{
(*slp->sl_funcs->scsi_low_establish_ccb_nexus) (slp);
}
}
return 2;
}
/*
* The following functions are called when targets give unexpected
* responces in msgin (after msgout).
*/
static int
scsi_low_errfunc_identify(slp, msgflags)
struct scsi_low_softc *slp;
u_int msgflags;
{
if (slp->sl_Lnexus != NULL)
{
slp->sl_Lnexus->li_cfgflags &= ~SCSI_LOW_DISC;
scsi_low_calcf_lun(slp->sl_Lnexus);
}
return 0;
}
static int
scsi_low_errfunc_synch(slp, msgflags)
struct scsi_low_softc *slp;
u_int msgflags;
{
struct targ_info *ti = slp->sl_Tnexus;
MSGIN_PERIOD(ti) = 0;
MSGIN_OFFSET(ti) = 0;
scsi_low_synch(slp);
return 0;
}
static int
scsi_low_errfunc_wide(slp, msgflags)
struct scsi_low_softc *slp;
u_int msgflags;
{
struct targ_info *ti = slp->sl_Tnexus;
MSGIN_WIDTHP(ti) = 0;
scsi_low_wide(slp);
return 0;
}
static int
scsi_low_errfunc_qtag(slp, msgflags)
struct scsi_low_softc *slp;
u_int msgflags;
{
if ((msgflags & SCSI_LOW_MSG_REJECT) != 0)
{
if (slp->sl_Qnexus != NULL)
{
scsi_low_deactivate_qtag(slp->sl_Qnexus);
}
if (slp->sl_Lnexus != NULL)
{
slp->sl_Lnexus->li_cfgflags &= ~SCSI_LOW_QTAG;
scsi_low_calcf_lun(slp->sl_Lnexus);
}
device_printf(slp->sl_dev, "scsi_low: qtag msg rejected\n");
}
return 0;
}
int
scsi_low_msgout(slp, ti, fl)
struct scsi_low_softc *slp;
struct targ_info *ti;
u_int fl;
{
struct scsi_low_msgout_data *mdp;
int len = 0;
#ifdef SCSI_LOW_DIAGNOSTIC
if (ti != slp->sl_Tnexus)
{
scsi_low_print(slp, NULL);
panic("scsi_low_msgout: Target nexus inconsistent");
}
#endif /* SCSI_LOW_DIAGNOSTIC */
slp->sl_ph_count ++;
if (slp->sl_ph_count > SCSI_LOW_MAX_PHCHANGES)
{
device_printf(slp->sl_dev, "too many phase changes\n");
slp->sl_error |= FATALIO;
scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ABORT, 0);
}
/* STEP I.
* Scsi phase changes.
* Previously msgs asserted are accepted by our target or
* processed by scsi_low_msgin.
* Thus clear all saved informations.
*/
if ((fl & SCSI_LOW_MSGOUT_INIT) != 0)
{
ti->ti_omsgflags = 0;
ti->ti_emsgflags = 0;
}
else if (slp->sl_atten == 0)
{
/* STEP II.
* We did not assert attention, however still our target required
* msgs. Resend previous msgs.
*/
ti->ti_msgflags |= ti->ti_omsgflags;
ti->ti_omsgflags = 0;
#ifdef SCSI_LOW_DIAGNOSTIC
device_printf(slp->sl_dev, "scsi_low_msgout: retry msgout\n");
#endif /* SCSI_LOW_DIAGNOSTIC */
}
/* STEP III.
* We have no msgs. send MSG_NOOP (OK?)
*/
if (scsi_low_is_msgout_continue(ti, 0) == 0)
scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_NOOP, 0);
/* STEP IV.
* Process all msgs
*/
ti->ti_msgoutlen = 0;
slp->sl_clear_atten = 0;
mdp = &scsi_low_msgout_data[0];
for ( ; mdp->md_flags != SCSI_LOW_MSG_ALL; mdp ++)
{
if ((ti->ti_msgflags & mdp->md_flags) != 0)
{
ti->ti_omsgflags |= mdp->md_flags;
ti->ti_msgflags &= ~mdp->md_flags;
ti->ti_emsgflags = mdp->md_flags;
ti->ti_msgoutstr[ti->ti_msgoutlen] = mdp->md_msg;
if (mdp->md_msgfunc != NULL)
len = (*mdp->md_msgfunc) (slp);
else
len = 1;
#ifdef SCSI_LOW_DIAGNOSTIC
scsi_low_msg_log_write(&ti->ti_log_msgout,
&ti->ti_msgoutstr[ti->ti_msgoutlen], len);
#endif /* SCSI_LOW_DIAGNOSTIC */
ti->ti_msgoutlen += len;
if ((mdp->md_condition & MSG_RELEASE_ATN) != 0)
{
slp->sl_clear_atten = 1;
break;
}
if ((fl & SCSI_LOW_MSGOUT_UNIFY) == 0 ||
ti->ti_msgflags == 0)
break;
if (ti->ti_msgoutlen >= SCSI_LOW_MAX_MSGLEN - 5)
break;
}
}
if (scsi_low_is_msgout_continue(ti, 0) == 0)
slp->sl_clear_atten = 1;
return ti->ti_msgoutlen;
}
/**************************************************************
* msgin
**************************************************************/
static int
scsi_low_msginfunc_noop(slp)
struct scsi_low_softc *slp;
{
return 0;
}
static int
scsi_low_msginfunc_rejop(slp)
struct scsi_low_softc *slp;
{
struct targ_info *ti = slp->sl_Tnexus;
u_int8_t msg = ti->ti_msgin[0];
device_printf(slp->sl_dev, "MSGIN: msg 0x%x rejected\n", (u_int) msg);
scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_REJECT, 0);
return 0;
}
static int
scsi_low_msginfunc_cc(slp)
struct scsi_low_softc *slp;
{
struct lun_info *li;
SCSI_LOW_SETUP_MSGPHASE(slp, MSGPH_CMDC);
/* validate status */
if (slp->sl_Qnexus == NULL)
return ENOENT;
slp->sl_Qnexus->ccb_sscp.scp_status = slp->sl_scp.scp_status;
li = slp->sl_Lnexus;
switch (slp->sl_scp.scp_status)
{
case ST_GOOD:
li->li_maxnqio = li->li_maxnexus;
break;
case ST_CHKCOND:
li->li_maxnqio = 0;
if (li->li_qflags & SCSI_LOW_QFLAG_CA_QCLEAR)
scsi_low_reset_nexus_lun(slp, li, 0);
break;
case ST_BUSY:
li->li_maxnqio = 0;
break;
case ST_QUEFULL:
if (li->li_maxnexus >= li->li_nqio)
li->li_maxnexus = li->li_nqio - 1;
li->li_maxnqio = li->li_maxnexus;
break;
case ST_INTERGOOD:
case ST_INTERMET:
slp->sl_error |= MSGERR;
break;
default:
break;
}
return 0;
}
static int
scsi_low_msginfunc_lcc(slp)
struct scsi_low_softc *slp;
{
struct targ_info *ti;
struct lun_info *li;
struct slccb *ncb, *cb;
ti = slp->sl_Tnexus;
li = slp->sl_Lnexus;
if ((cb = slp->sl_Qnexus) == NULL)
goto bad;
cb->ccb_sscp.scp_status = slp->sl_scp.scp_status;
switch (slp->sl_scp.scp_status)
{
case ST_INTERGOOD:
case ST_INTERMET:
li->li_maxnqio = li->li_maxnexus;
break;
default:
slp->sl_error |= MSGERR;
break;
}
if ((li->li_flags & SCSI_LOW_LINK) == 0)
goto bad;
cb->ccb_error |= slp->sl_error;
if (cb->ccb_error != 0)
goto bad;
for (ncb = TAILQ_FIRST(&slp->sl_start); ncb != NULL;
ncb = TAILQ_NEXT(ncb, ccb_chain))
{
if (ncb->li == li)
goto cmd_link_start;
}
bad:
SCSI_LOW_SETUP_MSGPHASE(slp, MSGPH_LCTERM);
scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_REJECT, 0);
return EIO;
cmd_link_start:
ncb->ccb_flags &= ~CCB_STARTQ;
TAILQ_REMOVE(&slp->sl_start, ncb, ccb_chain);
scsi_low_dealloc_qtag(ncb);
ncb->ccb_tag = cb->ccb_tag;
ncb->ccb_otag = cb->ccb_otag;
cb->ccb_tag = SCSI_LOW_UNKTAG;
cb->ccb_otag = SCSI_LOW_UNKTAG;
if (scsi_low_done(slp, cb) == SCSI_LOW_DONE_RETRY)
panic("%s: linked ccb retried",
device_get_nameunit(slp->sl_dev));
slp->sl_Qnexus = ncb;
slp->sl_ph_count = 0;
ncb->ccb_error = 0;
ncb->ccb_datalen = -1;
ncb->ccb_scp.scp_status = ST_UNKNOWN;
ncb->ccb_flags &= ~CCB_INTERNAL;
scsi_low_init_msgsys(slp, ti);
scsi_low_ccb_setup_cam(slp, ncb);
if (ncb->ccb_tcmax < SCSI_LOW_MIN_TOUT)
ncb->ccb_tcmax = SCSI_LOW_MIN_TOUT;
ncb->ccb_tc = ncb->ccb_tcmax;
/* setup saved scsi data pointer */
ncb->ccb_sscp = ncb->ccb_scp;
slp->sl_scp = ncb->ccb_sscp;
slp->sl_error = ncb->ccb_error;
#ifdef SCSI_LOW_DIAGNOSTIC
scsi_low_msg_log_init(&ti->ti_log_msgin);
scsi_low_msg_log_init(&ti->ti_log_msgout);
#endif /* SCSI_LOW_DIAGNOSTIC */
return EJUSTRETURN;
}
static int
scsi_low_msginfunc_disc(slp)
struct scsi_low_softc *slp;
{
SCSI_LOW_SETUP_MSGPHASE(slp, MSGPH_DISC);
return 0;
}
static int
scsi_low_msginfunc_sdp(slp)
struct scsi_low_softc *slp;
{
struct slccb *cb = slp->sl_Qnexus;
if (cb != NULL)
{
cb->ccb_sscp.scp_datalen = slp->sl_scp.scp_datalen;
cb->ccb_sscp.scp_data = slp->sl_scp.scp_data;
}
else
scsi_low_assert_msg(slp, slp->sl_Tnexus, SCSI_LOW_MSG_REJECT, 0);
return 0;
}
static int
scsi_low_msginfunc_rp(slp)
struct scsi_low_softc *slp;
{
if (slp->sl_Qnexus != NULL)
slp->sl_scp = slp->sl_Qnexus->ccb_sscp;
else
scsi_low_assert_msg(slp, slp->sl_Tnexus, SCSI_LOW_MSG_REJECT, 0);
return 0;
}
static int
scsi_low_synch(slp)
struct scsi_low_softc *slp;
{
struct targ_info *ti = slp->sl_Tnexus;
u_int period = 0, offset = 0, speed;
u_char *s;
int error;
if ((MSGIN_PERIOD(ti) >= ti->ti_maxsynch.period &&
MSGIN_OFFSET(ti) <= ti->ti_maxsynch.offset) ||
MSGIN_OFFSET(ti) == 0)
{
if ((offset = MSGIN_OFFSET(ti)) != 0)
period = MSGIN_PERIOD(ti);
s = offset ? "synchronous" : "async";
}
else
{
/* XXX:
* Target seems to be brain damaged.
* Force async transfer.
*/
ti->ti_maxsynch.period = 0;
ti->ti_maxsynch.offset = 0;
device_printf(slp->sl_dev,
"target brain damaged. async transfer\n");
return EINVAL;
}
ti->ti_maxsynch.period = period;
ti->ti_maxsynch.offset = offset;
error = (*slp->sl_funcs->scsi_low_msg) (slp, ti, SCSI_LOW_MSG_SYNCH);
if (error != 0)
{
/* XXX:
* Current period and offset are not acceptable
* for our adapter.
* The adapter changes max synch and max offset.
*/
device_printf(slp->sl_dev,
"synch neg failed. retry synch msg neg ...\n");
return error;
}
ti->ti_osynch = ti->ti_maxsynch;
if (offset > 0)
{
ti->ti_setup_msg_done |= SCSI_LOW_MSG_SYNCH;
}
/* inform data */
if ((slp->sl_show_result & SHOW_SYNCH_NEG) != 0)
{
#ifdef SCSI_LOW_NEGOTIATE_BEFORE_SENSE
struct slccb *cb = slp->sl_Qnexus;
if (cb != NULL && (cb->ccb_flags & CCB_SENSE) != 0)
return 0;
#endif /* SCSI_LOW_NEGOTIATE_BEFORE_SENSE */
device_printf(slp->sl_dev,
"(%d:*): <%s> offset %d period %dns ",
ti->ti_id, s, offset, period * 4);
if (period != 0)
{
speed = 1000 * 10 / (period * 4);
printf("%d.%d M/s", speed / 10, speed % 10);
}
printf("\n");
}
return 0;
}
static int
scsi_low_wide(slp)
struct scsi_low_softc *slp;
{
struct targ_info *ti = slp->sl_Tnexus;
int error;
ti->ti_width = MSGIN_WIDTHP(ti);
error = (*slp->sl_funcs->scsi_low_msg) (slp, ti, SCSI_LOW_MSG_WIDE);
if (error != 0)
{
/* XXX:
* Current width is not acceptable for our adapter.
* The adapter changes max width.
*/
device_printf(slp->sl_dev,
"wide neg failed. retry wide msg neg ...\n");
return error;
}
ti->ti_owidth = ti->ti_width;
if (ti->ti_width > SCSI_LOW_BUS_WIDTH_8)
{
ti->ti_setup_msg_done |=
(SCSI_LOW_MSG_SYNCH | SCSI_LOW_MSG_WIDE);
}
/* inform data */
if ((slp->sl_show_result & SHOW_WIDE_NEG) != 0)
{
#ifdef SCSI_LOW_NEGOTIATE_BEFORE_SENSE
struct slccb *cb = slp->sl_Qnexus;
if (cb != NULL && (cb->ccb_flags & CCB_SENSE) != 0)
return 0;
#endif /* SCSI_LOW_NEGOTIATE_BEFORE_SENSE */
device_printf(slp->sl_dev, "(%d:*): transfer width %d bits\n",
ti->ti_id, 1 << (3 + ti->ti_width));
}
return 0;
}
static int
scsi_low_msginfunc_simple_qtag(slp)
struct scsi_low_softc *slp;
{
struct targ_info *ti = slp->sl_Tnexus;
scsi_low_tag_t etag = (scsi_low_tag_t) ti->ti_msgin[1];
if (slp->sl_Qnexus != NULL)
{
if (slp->sl_Qnexus->ccb_tag != etag)
{
slp->sl_error |= FATALIO;
scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ABORT, 0);
SCSI_LOW_INFO(slp, ti, "MSGIN: qtag mismatch");
}
}
else if (scsi_low_establish_ccb(ti, slp->sl_Lnexus, etag) == NULL)
{
#ifdef SCSI_LOW_DEBUG
if (SCSI_LOW_DEBUG_TEST_GO(SCSI_LOW_NEXUS_CHECK, ti->ti_id))
return 0;
#endif /* SCSI_LOW_DEBUG */
slp->sl_error |= FATALIO;
scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ABORT_QTAG, 0);
SCSI_LOW_INFO(slp, ti, "MSGIN: taged ccb not found");
}
return 0;
}
static int
scsi_low_msginfunc_i_wide_residue(slp)
struct scsi_low_softc *slp;
{
struct targ_info *ti = slp->sl_Tnexus;
struct slccb *cb = slp->sl_Qnexus;
int res = (int) ti->ti_msgin[1];
if (cb == NULL || res <= 0 ||
(ti->ti_width == SCSI_LOW_BUS_WIDTH_16 && res > 1) ||
(ti->ti_width == SCSI_LOW_BUS_WIDTH_32 && res > 3))
return EINVAL;
if (slp->sl_scp.scp_datalen + res > cb->ccb_scp.scp_datalen)
return EINVAL;
slp->sl_scp.scp_datalen += res;
slp->sl_scp.scp_data -= res;
scsi_low_data_finish(slp);
return 0;
}
static int
scsi_low_msginfunc_ext(slp)
struct scsi_low_softc *slp;
{
struct slccb *cb = slp->sl_Qnexus;
struct lun_info *li = slp->sl_Lnexus;
struct targ_info *ti = slp->sl_Tnexus;
int count, retry;
u_int32_t *ptr;
if (ti->ti_msginptr == 2)
{
ti->ti_msginlen = ti->ti_msgin[1] + 2;
return 0;
}
switch (MKMSG_EXTEND(ti->ti_msgin[1], ti->ti_msgin[2]))
{
case MKMSG_EXTEND(MSG_EXTEND_MDPLEN, MSG_EXTEND_MDPCODE):
if (cb == NULL)
break;
ptr = (u_int32_t *)(&ti->ti_msgin[3]);
count = (int) htonl((long) (*ptr));
if(slp->sl_scp.scp_datalen - count < 0 ||
slp->sl_scp.scp_datalen - count > cb->ccb_scp.scp_datalen)
break;
slp->sl_scp.scp_datalen -= count;
slp->sl_scp.scp_data += count;
return 0;
case MKMSG_EXTEND(MSG_EXTEND_SYNCHLEN, MSG_EXTEND_SYNCHCODE):
if (li == NULL)
break;
retry = scsi_low_synch(slp);
if (retry != 0 || (ti->ti_emsgflags & SCSI_LOW_MSG_SYNCH) == 0)
scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_SYNCH, 0);
#ifdef SCSI_LOW_DEBUG
if (SCSI_LOW_DEBUG_TEST_GO(SCSI_LOW_ATTEN_CHECK, ti->ti_id))
{
scsi_low_test_atten(slp, ti, SCSI_LOW_MSG_SYNCH);
}
#endif /* SCSI_LOW_DEBUG */
return 0;
case MKMSG_EXTEND(MSG_EXTEND_WIDELEN, MSG_EXTEND_WIDECODE):
if (li == NULL)
break;
retry = scsi_low_wide(slp);
if (retry != 0 || (ti->ti_emsgflags & SCSI_LOW_MSG_WIDE) == 0)
scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_WIDE, 0);
return 0;
default:
break;
}
scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_REJECT, 0);
return EINVAL;
}
static int
scsi_low_msginfunc_parity(slp)
struct scsi_low_softc *slp;
{
struct targ_info *ti = slp->sl_Tnexus;
/* only I -> T, invalid! */
scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_REJECT, 0);
return 0;
}
static int
scsi_low_msginfunc_msg_reject(slp)
struct scsi_low_softc *slp;
{
struct targ_info *ti = slp->sl_Tnexus;
struct scsi_low_msgout_data *mdp;
u_int msgflags;
if (ti->ti_emsgflags != 0)
{
device_printf(slp->sl_dev, "msg flags [0x%x] rejected\n",
ti->ti_emsgflags);
msgflags = SCSI_LOW_MSG_REJECT;
mdp = &scsi_low_msgout_data[0];
for ( ; mdp->md_flags != SCSI_LOW_MSG_ALL; mdp ++)
{
if ((ti->ti_emsgflags & mdp->md_flags) != 0)
{
ti->ti_emsgflags &= ~mdp->md_flags;
if (mdp->md_errfunc != NULL)
(*mdp->md_errfunc) (slp, msgflags);
break;
}
}
return 0;
}
else
{
SCSI_LOW_INFO(slp, ti, "MSGIN: rejected msg not found");
slp->sl_error |= MSGERR;
}
return EINVAL;
}
int
scsi_low_msgin(slp, ti, c)
struct scsi_low_softc *slp;
struct targ_info *ti;
u_int c;
{
struct scsi_low_msgin_data *sdp;
struct lun_info *li;
u_int8_t msg;
#ifdef SCSI_LOW_DIAGNOSTIC
if (ti != slp->sl_Tnexus)
{
scsi_low_print(slp, NULL);
panic("scsi_low_msgin: Target nexus inconsistent");
}
#endif /* SCSI_LOW_DIAGNOSTIC */
/*
* Phase changes, clear the pointer.
*/
if (ti->ti_ophase != ti->ti_phase)
{
MSGINPTR_CLR(ti);
ti->ti_msgin_parity_error = 0;
slp->sl_ph_count ++;
if (slp->sl_ph_count > SCSI_LOW_MAX_PHCHANGES)
{
device_printf(slp->sl_dev, "too many phase changes\n");
slp->sl_error |= FATALIO;
scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ABORT, 0);
}
}
/*
* Store a current messages byte into buffer and
* wait for the completion of the current msg.
*/
ti->ti_msgin[ti->ti_msginptr ++] = (u_int8_t) c;
if (ti->ti_msginptr >= SCSI_LOW_MAX_MSGLEN)
{
ti->ti_msginptr = SCSI_LOW_MAX_MSGLEN - 1;
scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_REJECT, 0);
}
/*
* Check parity errors.
*/
if ((c & SCSI_LOW_DATA_PE) != 0)
{
ti->ti_msgin_parity_error ++;
scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_PARITY, 0);
goto out;
}
if (ti->ti_msgin_parity_error != 0)
goto out;
/*
* Calculate messages length.
*/
msg = ti->ti_msgin[0];
if (msg < MSGIN_DATA_LAST)
sdp = &scsi_low_msgin_data[msg];
else
sdp = &scsi_low_msgin_data[MSGIN_DATA_LAST];
if (ti->ti_msginlen == 0)
{
ti->ti_msginlen = sdp->md_len;
}
/*
* Check comletion.
*/
if (ti->ti_msginptr < ti->ti_msginlen)
return EJUSTRETURN;
/*
* Do process.
*/
if ((msg & MSG_IDENTIFY) == 0)
{
if (((*sdp->md_msgfunc) (slp)) == EJUSTRETURN)
return EJUSTRETURN;
}
else
{
li = slp->sl_Lnexus;
if (li == NULL)
{
li = scsi_low_alloc_li(ti, MSGCMD_LUN(msg), 0);
if (li == NULL)
goto badlun;
slp->sl_Lnexus = li;
(*slp->sl_funcs->scsi_low_establish_lun_nexus) (slp);
}
else
{
if (MSGCMD_LUN(msg) != li->li_lun)
goto badlun;
}
if (slp->sl_Qnexus == NULL && li->li_nqio == 0)
{
if (!scsi_low_establish_ccb(ti, li, SCSI_LOW_UNKTAG))
{
#ifdef SCSI_LOW_DEBUG
if (SCSI_LOW_DEBUG_TEST_GO(SCSI_LOW_NEXUS_CHECK, ti->ti_id) != 0)
{
goto out;
}
#endif /* SCSI_LOW_DEBUG */
goto badlun;
}
}
}
goto out;
/*
* Msg process completed, reset msgin pointer and assert ATN if desired.
*/
badlun:
slp->sl_error |= FATALIO;
scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ABORT, 0);
SCSI_LOW_INFO(slp, ti, "MSGIN: identify wrong");
out:
if (ti->ti_msginptr < ti->ti_msginlen)
return EJUSTRETURN;
#ifdef SCSI_LOW_DIAGNOSTIC
scsi_low_msg_log_write(&ti->ti_log_msgin,
&ti->ti_msgin[0], ti->ti_msginlen);
#endif /* SCSI_LOW_DIAGNOSTIC */
MSGINPTR_CLR(ti);
return 0;
}
/**********************************************************
* disconnect
**********************************************************/
int
scsi_low_disconnected(slp, ti)
struct scsi_low_softc *slp;
struct targ_info *ti;
{
struct slccb *cb = slp->sl_Qnexus;
/* check phase completion */
switch (slp->sl_msgphase)
{
case MSGPH_RESET:
scsi_low_statusin(slp, slp->sl_Tnexus, ST_GOOD);
scsi_low_msginfunc_cc(slp);
scsi_low_reset_nexus_target(slp, slp->sl_Tnexus, 0);
goto io_resume;
case MSGPH_ABORT:
scsi_low_statusin(slp, slp->sl_Tnexus, ST_GOOD);
scsi_low_msginfunc_cc(slp);
scsi_low_reset_nexus_lun(slp, slp->sl_Lnexus, 0);
goto io_resume;
case MSGPH_TERM:
scsi_low_statusin(slp, slp->sl_Tnexus, ST_GOOD);
scsi_low_msginfunc_cc(slp);
goto io_resume;
case MSGPH_DISC:
if (cb != NULL)
{
struct lun_info *li;
li = cb->li;
TAILQ_INSERT_TAIL(&li->li_discq, cb, ccb_chain);
cb->ccb_flags |= CCB_DISCQ;
cb->ccb_error |= slp->sl_error;
li->li_disc ++;
ti->ti_disc ++;
slp->sl_disc ++;
}
#ifdef SCSI_LOW_STATICS
scsi_low_statics.nexus_disconnected ++;
#endif /* SCSI_LOW_STATICS */
#ifdef SCSI_LOW_DEBUG
if (SCSI_LOW_DEBUG_GO(SCSI_LOW_DEBUG_DISC, ti->ti_id) != 0)
{
printf("## SCSI_LOW_DISCONNECTED ===============\n");
scsi_low_print(slp, NULL);
}
#endif /* SCSI_LOW_DEBUG */
break;
case MSGPH_NULL:
slp->sl_error |= FATALIO;
if (ti->ti_phase == PH_SELSTART)
slp->sl_error |= SELTIMEOUTIO;
else
slp->sl_error |= UBFERR;
/* fall through */
case MSGPH_LCTERM:
case MSGPH_CMDC:
io_resume:
if (cb == NULL)
break;
#ifdef SCSI_LOW_DEBUG
if (SCSI_LOW_DEBUG_TEST_GO(SCSI_LOW_ATTEN_CHECK, ti->ti_id))
{
if (cb->ccb_omsgoutflag == SCSI_LOW_MSG_NOOP &&
(cb->ccb_msgoutflag != 0 ||
(ti->ti_msgflags & SCSI_LOW_MSG_NOOP)))
{
scsi_low_info(slp, ti, "ATTEN CHECK FAILED");
}
}
#endif /* SCSI_LOW_DEBUG */
cb->ccb_error |= slp->sl_error;
if (scsi_low_done(slp, cb) == SCSI_LOW_DONE_RETRY)
{
cb->ccb_flags |= CCB_STARTQ;
TAILQ_INSERT_HEAD(&slp->sl_start, cb, ccb_chain);
}
break;
}
scsi_low_bus_release(slp, ti);
scsi_low_start(slp);
return 1;
}
/**********************************************************
* TAG operations
**********************************************************/
static int
scsi_low_alloc_qtag(cb)
struct slccb *cb;
{
struct lun_info *li = cb->li;
scsi_low_tag_t etag;
if (cb->ccb_otag != SCSI_LOW_UNKTAG)
return 0;
#ifndef SCSI_LOW_ALT_QTAG_ALLOCATE
etag = ffs(li->li_qtagbits);
if (etag == 0)
return ENOSPC;
li->li_qtagbits &= ~(1 << (etag - 1));
cb->ccb_otag = etag;
return 0;
#else /* SCSI_LOW_ALT_QTAG_ALLOCATE */
for (etag = li->li_qd ; li->li_qd < SCSI_LOW_MAXNEXUS; li->li_qd ++)
if (li->li_qtagarray[li->li_qd] == 0)
goto found;
for (li->li_qd = 0; li->li_qd < etag; li->li_qd ++)
if (li->li_qtagarray[li->li_qd] == 0)
goto found;
return ENOSPC;
found:
li->li_qtagarray[li->li_qd] ++;
cb->ccb_otag = (li->li_qd ++);
return 0;
#endif /* SCSI_LOW_ALT_QTAG_ALLOCATE */
}
static int
scsi_low_dealloc_qtag(cb)
struct slccb *cb;
{
struct lun_info *li = cb->li;
scsi_low_tag_t etag;
if (cb->ccb_otag == SCSI_LOW_UNKTAG)
return 0;
#ifndef SCSI_LOW_ALT_QTAG_ALLOCATE
etag = cb->ccb_otag - 1;
#ifdef SCSI_LOW_DIAGNOSTIC
if (etag >= sizeof(li->li_qtagbits) * NBBY)
panic("scsi_low_dealloc_tag: illegal tag");
#endif /* SCSI_LOW_DIAGNOSTIC */
li->li_qtagbits |= (1 << etag);
#else /* SCSI_LOW_ALT_QTAG_ALLOCATE */
etag = cb->ccb_otag;
#ifdef SCSI_LOW_DIAGNOSTIC
if (etag >= SCSI_LOW_MAXNEXUS)
panic("scsi_low_dealloc_tag: illegal tag");
#endif /* SCSI_LOW_DIAGNOSTIC */
li->li_qtagarray[etag] --;
#endif /* SCSI_LOW_ALT_QTAG_ALLOCATE */
cb->ccb_otag = SCSI_LOW_UNKTAG;
return 0;
}
static struct slccb *
scsi_low_revoke_ccb(slp, cb, fdone)
struct scsi_low_softc *slp;
struct slccb *cb;
int fdone;
{
struct targ_info *ti = cb->ti;
struct lun_info *li = cb->li;
#ifdef SCSI_LOW_DIAGNOSTIC
if ((cb->ccb_flags & (CCB_STARTQ | CCB_DISCQ)) ==
(CCB_STARTQ | CCB_DISCQ))
{
panic("%s: ccb in both queue",
device_get_nameunit(slp->sl_dev));
}
#endif /* SCSI_LOW_DIAGNOSTIC */
if ((cb->ccb_flags & CCB_STARTQ) != 0)
{
TAILQ_REMOVE(&slp->sl_start, cb, ccb_chain);
}
if ((cb->ccb_flags & CCB_DISCQ) != 0)
{
TAILQ_REMOVE(&li->li_discq, cb, ccb_chain);
li->li_disc --;
ti->ti_disc --;
slp->sl_disc --;
}
cb->ccb_flags &= ~(CCB_STARTQ | CCB_DISCQ |
CCB_SENSE | CCB_CLEARQ | CCB_INTERNAL);
if (fdone != 0 &&
(cb->ccb_rcnt ++ >= slp->sl_max_retry ||
(cb->ccb_flags & CCB_NORETRY) != 0))
{
cb->ccb_error |= FATALIO;
cb->ccb_flags &= ~CCB_AUTOSENSE;
if (scsi_low_done(slp, cb) != SCSI_LOW_DONE_COMPLETE)
panic("%s: done ccb retried",
device_get_nameunit(slp->sl_dev));
return NULL;
}
else
{
cb->ccb_error |= PENDINGIO;
scsi_low_deactivate_qtag(cb);
scsi_low_ccb_message_retry(cb);
cb->ccb_tc = cb->ccb_tcmax = SCSI_LOW_MIN_TOUT;
return cb;
}
}
static void
scsi_low_reset_nexus_lun(slp, li, fdone)
struct scsi_low_softc *slp;
struct lun_info *li;
int fdone;
{
struct slccb *cb, *ncb, *ecb;
if (li == NULL)
return;
ecb = NULL;
for (cb = TAILQ_FIRST(&li->li_discq); cb != NULL; cb = ncb)
{
ncb = TAILQ_NEXT(cb, ccb_chain);
cb = scsi_low_revoke_ccb(slp, cb, fdone);
if (cb != NULL)
{
/*
* presumely keep ordering of io
*/
cb->ccb_flags |= CCB_STARTQ;
if (ecb == NULL)
{
TAILQ_INSERT_HEAD(&slp->sl_start,\
cb, ccb_chain);
}
else
{
TAILQ_INSERT_AFTER(&slp->sl_start,\
ecb, cb, ccb_chain);
}
ecb = cb;
}
}
}
/**************************************************************
* Qurik setup
**************************************************************/
static void
scsi_low_calcf_lun(li)
struct lun_info *li;
{
struct targ_info *ti = li->li_ti;
struct scsi_low_softc *slp = ti->ti_sc;
u_int cfgflags, diskflags;
if (li->li_flags_valid == SCSI_LOW_LUN_FLAGS_ALL_VALID)
cfgflags = li->li_cfgflags;
else
cfgflags = 0;
diskflags = li->li_diskflags & li->li_quirks;
/* disconnect */
li->li_flags &= ~SCSI_LOW_DISC;
if ((slp->sl_cfgflags & CFG_NODISC) == 0 &&
(diskflags & SCSI_LOW_DISK_DISC) != 0 &&
(cfgflags & SCSI_LOW_DISC) != 0)
li->li_flags |= SCSI_LOW_DISC;
/* parity */
li->li_flags |= SCSI_LOW_NOPARITY;
if ((slp->sl_cfgflags & CFG_NOPARITY) == 0 &&
(diskflags & SCSI_LOW_DISK_PARITY) != 0 &&
(cfgflags & SCSI_LOW_NOPARITY) == 0)
li->li_flags &= ~SCSI_LOW_NOPARITY;
/* qtag */
if ((slp->sl_cfgflags & CFG_NOQTAG) == 0 &&
(cfgflags & SCSI_LOW_QTAG) != 0 &&
(diskflags & SCSI_LOW_DISK_QTAG) != 0)
{
li->li_flags |= SCSI_LOW_QTAG;
li->li_maxnexus = SCSI_LOW_MAXNEXUS;
li->li_maxnqio = li->li_maxnexus;
}
else
{
li->li_flags &= ~SCSI_LOW_QTAG;
li->li_maxnexus = 0;
li->li_maxnqio = li->li_maxnexus;
}
/* cmd link */
li->li_flags &= ~SCSI_LOW_LINK;
if ((cfgflags & SCSI_LOW_LINK) != 0 &&
(diskflags & SCSI_LOW_DISK_LINK) != 0)
li->li_flags |= SCSI_LOW_LINK;
/* compatible flags */
li->li_flags &= ~SCSI_LOW_SYNC;
if (ti->ti_maxsynch.offset > 0)
li->li_flags |= SCSI_LOW_SYNC;
#ifdef SCSI_LOW_DEBUG
if (SCSI_LOW_DEBUG_GO(SCSI_LOW_DEBUG_CALCF, ti->ti_id) != 0)
{
scsi_low_calcf_show(li);
}
#endif /* SCSI_LOW_DEBUG */
}
static void
scsi_low_calcf_target(ti)
struct targ_info *ti;
{
struct scsi_low_softc *slp = ti->ti_sc;
u_int offset, period, diskflags;
diskflags = ti->ti_diskflags & ti->ti_quirks;
/* synch */
if ((slp->sl_cfgflags & CFG_ASYNC) == 0 &&
(diskflags & SCSI_LOW_DISK_SYNC) != 0)
{
offset = ti->ti_maxsynch.offset;
period = ti->ti_maxsynch.period;
if (offset == 0 || period == 0)
offset = period = 0;
}
else
{
offset = period = 0;
}
ti->ti_maxsynch.offset = offset;
ti->ti_maxsynch.period = period;
/* wide */
if ((diskflags & SCSI_LOW_DISK_WIDE_32) == 0 &&
ti->ti_width > SCSI_LOW_BUS_WIDTH_16)
ti->ti_width = SCSI_LOW_BUS_WIDTH_16;
if ((diskflags & SCSI_LOW_DISK_WIDE_16) == 0 &&
ti->ti_width > SCSI_LOW_BUS_WIDTH_8)
ti->ti_width = SCSI_LOW_BUS_WIDTH_8;
if (ti->ti_flags_valid == SCSI_LOW_TARG_FLAGS_ALL_VALID)
{
if (ti->ti_maxsynch.offset != ti->ti_osynch.offset ||
ti->ti_maxsynch.period != ti->ti_osynch.period)
ti->ti_setup_msg |= SCSI_LOW_MSG_SYNCH;
if (ti->ti_width != ti->ti_owidth)
ti->ti_setup_msg |= (SCSI_LOW_MSG_WIDE | SCSI_LOW_MSG_SYNCH);
ti->ti_osynch = ti->ti_maxsynch;
ti->ti_owidth = ti->ti_width;
}
#ifdef SCSI_LOW_DEBUG
if (SCSI_LOW_DEBUG_GO(SCSI_LOW_DEBUG_CALCF, ti->ti_id) != 0)
{
device_printf(slp->sl_dev,
"(%d:*): max period(%dns) offset(%d) width(%d)\n",
ti->ti_id,
ti->ti_maxsynch.period * 4,
ti->ti_maxsynch.offset,
ti->ti_width);
}
#endif /* SCSI_LOW_DEBUG */
}
static void
scsi_low_calcf_show(li)
struct lun_info *li;
{
struct targ_info *ti = li->li_ti;
struct scsi_low_softc *slp = ti->ti_sc;
device_printf(slp->sl_dev,
"(%d:%d): period(%d ns) offset(%d) width(%d) flags 0x%b\n",
ti->ti_id, li->li_lun,
ti->ti_maxsynch.period * 4,
ti->ti_maxsynch.offset,
ti->ti_width,
li->li_flags, SCSI_LOW_BITS);
}
#ifdef SCSI_LOW_START_UP_CHECK
/**************************************************************
* scsi world start up
**************************************************************/
static int scsi_low_poll(struct scsi_low_softc *, struct slccb *);
static int
scsi_low_start_up(slp)
struct scsi_low_softc *slp;
{
struct targ_info *ti;
struct lun_info *li;
struct slccb *cb;
int target, lun;
device_printf(slp->sl_dev, "scsi_low: probing all devices ....\n");
for (target = 0; target < slp->sl_ntargs; target ++)
{
if (target == slp->sl_hostid)
{
if ((slp->sl_show_result & SHOW_PROBE_RES) != 0)
{
device_printf(slp->sl_dev,
"scsi_low: target %d (host card)\n",
target);
}
continue;
}
if ((slp->sl_show_result & SHOW_PROBE_RES) != 0)
{
device_printf(slp->sl_dev, "scsi_low: target %d lun ",
target);
}
ti = slp->sl_ti[target];
for (lun = 0; lun < slp->sl_nluns; lun ++)
{
if ((cb = SCSI_LOW_ALLOC_CCB(1)) == NULL)
break;
cb->osdep = NULL;
cb->bp = NULL;
li = scsi_low_alloc_li(ti, lun, 1);
scsi_low_enqueue(slp, ti, li, cb,
CCB_AUTOSENSE | CCB_POLLED, 0);
scsi_low_poll(slp, cb);
if (li->li_state != SCSI_LOW_LUN_OK)
break;
if ((slp->sl_show_result & SHOW_PROBE_RES) != 0)
{
printf("%d ", lun);
}
}
if ((slp->sl_show_result & SHOW_PROBE_RES) != 0)
{
printf("\n");
}
}
return 0;
}
static int
scsi_low_poll(slp, cb)
struct scsi_low_softc *slp;
struct slccb *cb;
{
int tcount;
tcount = 0;
while (slp->sl_nio > 0)
{
DELAY((1000 * 1000) / SCSI_LOW_POLL_HZ);
(*slp->sl_funcs->scsi_low_poll) (slp);
if (tcount ++ < SCSI_LOW_POLL_HZ / SCSI_LOW_TIMEOUT_HZ)
continue;
tcount = 0;
scsi_low_timeout_check(slp);
}
return 0;
}
#endif /* SCSI_LOW_START_UP_CHECK */
/**********************************************************
* DEBUG SECTION
**********************************************************/
#ifdef SCSI_LOW_DEBUG
static void
scsi_low_test_abort(slp, ti, li)
struct scsi_low_softc *slp;
struct targ_info *ti;
struct lun_info *li;
{
struct slccb *acb;
if (li->li_disc > 1)
{
acb = TAILQ_FIRST(&li->li_discq);
if (scsi_low_abort_ccb(slp, acb) == 0)
{
device_printf(slp->sl_dev,
"aborting ccb(0x%lx) start\n", (u_long) acb);
}
}
}
static void
scsi_low_test_atten(slp, ti, msg)
struct scsi_low_softc *slp;
struct targ_info *ti;
u_int msg;
{
if (slp->sl_ph_count < SCSI_LOW_MAX_ATTEN_CHECK)
scsi_low_assert_msg(slp, ti, msg, 0);
else
device_printf(slp->sl_dev, "atten check OK\n");
}
static void
scsi_low_test_cmdlnk(slp, cb)
struct scsi_low_softc *slp;
struct slccb *cb;
{
#define SCSI_LOW_CMDLNK_NOK (CCB_INTERNAL | CCB_SENSE | CCB_CLEARQ)
if ((cb->ccb_flags & SCSI_LOW_CMDLNK_NOK) != 0)
return;
memcpy(cb->ccb_scsi_cmd, slp->sl_scp.scp_cmd,
slp->sl_scp.scp_cmdlen);
cb->ccb_scsi_cmd[slp->sl_scp.scp_cmdlen - 1] |= 1;
slp->sl_scp.scp_cmd = cb->ccb_scsi_cmd;
}
#endif /* SCSI_LOW_DEBUG */
/* static */ void
scsi_low_info(slp, ti, s)
struct scsi_low_softc *slp;
struct targ_info *ti;
u_char *s;
{
if (slp == NULL)
slp = LIST_FIRST(&sl_tab);
if (s == NULL)
s = "no message";
printf(">>>>> SCSI_LOW_INFO(0x%lx): %s\n", (u_long) slp->sl_Tnexus, s);
if (ti == NULL)
{
TAILQ_FOREACH(ti, &slp->sl_titab, ti_chain)
{
scsi_low_print(slp, ti);
}
}
else
{
scsi_low_print(slp, ti);
}
}
static u_char *phase[] =
{
"FREE", "ARBSTART", "SELSTART", "SELECTED",
"CMDOUT", "DATA", "MSGIN", "MSGOUT", "STATIN", "DISC", "RESEL"
};
void
scsi_low_print(slp, ti)
struct scsi_low_softc *slp;
struct targ_info *ti;
{
struct lun_info *li;
struct slccb *cb;
struct sc_p *sp;
if (ti == NULL || ti == slp->sl_Tnexus)
{
ti = slp->sl_Tnexus;
li = slp->sl_Lnexus;
cb = slp->sl_Qnexus;
}
else
{
li = LIST_FIRST(&ti->ti_litab);
cb = TAILQ_FIRST(&li->li_discq);
}
sp = &slp->sl_scp;
device_printf(slp->sl_dev,
"=== NEXUS T(0x%lx) L(0x%lx) Q(0x%lx) NIO(%d) ===\n",
(u_long) ti, (u_long) li, (u_long) cb, slp->sl_nio);
/* target stat */
if (ti != NULL)
{
u_int flags = 0, maxnqio = 0, nqio = 0;
int lun = CAM_LUN_WILDCARD;
if (li != NULL)
{
lun = li->li_lun;
flags = li->li_flags;
maxnqio = li->li_maxnqio;
nqio = li->li_nqio;
}
device_printf(slp->sl_dev,
"(%d:%d) ph<%s> => ph<%s> DISC(%d) QIO(%d:%d)\n",
ti->ti_id, lun, phase[(int) ti->ti_ophase],
phase[(int) ti->ti_phase], ti->ti_disc,
nqio, maxnqio);
if (cb != NULL)
{
printf("CCB: cmd[0] 0x%x clen 0x%x dlen 0x%x<0x%x stat 0x%x err %b\n",
(u_int) cb->ccb_scp.scp_cmd[0],
cb->ccb_scp.scp_cmdlen,
cb->ccb_datalen,
cb->ccb_scp.scp_datalen,
(u_int) cb->ccb_sscp.scp_status,
cb->ccb_error, SCSI_LOW_ERRORBITS);
}
printf("MSGIN: ptr(%x) [%x][%x][%x][%x][%x] attention: %d\n",
(u_int) (ti->ti_msginptr),
(u_int) (ti->ti_msgin[0]),
(u_int) (ti->ti_msgin[1]),
(u_int) (ti->ti_msgin[2]),
(u_int) (ti->ti_msgin[3]),
(u_int) (ti->ti_msgin[4]),
slp->sl_atten);
printf("MSGOUT: msgflags 0x%x [%x][%x][%x][%x][%x] msgoutlen %d C_FLAGS: %b\n",
(u_int) ti->ti_msgflags,
(u_int) (ti->ti_msgoutstr[0]),
(u_int) (ti->ti_msgoutstr[1]),
(u_int) (ti->ti_msgoutstr[2]),
(u_int) (ti->ti_msgoutstr[3]),
(u_int) (ti->ti_msgoutstr[4]),
ti->ti_msgoutlen,
flags, SCSI_LOW_BITS);
#ifdef SCSI_LOW_DIAGNOSTIC
scsi_low_msg_log_show(&ti->ti_log_msgin, "MIN LOG ", 2);
scsi_low_msg_log_show(&ti->ti_log_msgout, "MOUT LOG", 2);
#endif /* SCSI_LOW_DIAGNOSTIC */
}
printf("SCB: daddr 0x%lx dlen 0x%x stat 0x%x err %b\n",
(u_long) sp->scp_data,
sp->scp_datalen,
(u_int) sp->scp_status,
slp->sl_error, SCSI_LOW_ERRORBITS);
}
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