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freebsd-skq/sys/cam/scsi/scsi_low.h
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

792 lines
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/* $FreeBSD$ */
/* $NecBSD: scsi_low.h,v 1.24.10.5 2001/06/26 07:31:46 honda Exp $ */
/* $NetBSD$ */
#define SCSI_LOW_DIAGNOSTIC
#define SCSI_LOW_ALT_QTAG_ALLOCATE
/*-
* [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.
*/
#ifndef _SCSI_LOW_H_
#define _SCSI_LOW_H_
/******** includes *******************************/
#include <sys/bus.h>
#include <sys/kdb.h>
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_sim.h>
#include <cam/cam_xpt_sim.h>
#include <cam/cam_debug.h>
#include <cam/scsi/scsi_dvcfg.h>
#include <i386/isa/ccbque.h>
/******** functions macro ************************/
#undef MSG_IDENTIFY
/*================================================
* Generic Scsi Low header file
================================================*/
/*************************************************
* Scsi low definitions
*************************************************/
#define SCSI_LOW_SYNC DVF_SCSI_SYNC
#define SCSI_LOW_DISC DVF_SCSI_DISC
#define SCSI_LOW_WAIT DVF_SCSI_WAIT
#define SCSI_LOW_LINK DVF_SCSI_LINK
#define SCSI_LOW_QTAG DVF_SCSI_QTAG
#define SCSI_LOW_NOPARITY DVF_SCSI_NOPARITY
#define SCSI_LOW_SAVESP DVF_SCSI_SAVESP
#define SCSI_LOW_DEFCFG DVF_SCSI_DEFCFG
#define SCSI_LOW_BITS DVF_SCSI_BITS
#define SCSI_LOW_PERIOD(n) DVF_SCSI_PERIOD(n)
#define SCSI_LOW_OFFSET(n) DVF_SCSI_OFFSET(n)
/* host scsi id and targets macro */
#ifndef SCSI_LOW_NTARGETS
#define SCSI_LOW_NTARGETS 8
#endif /* SCSI_LOW_NTARGETS */
#define SCSI_LOW_NCCB 128
#define SCSI_LOW_MAX_RETRY 3
#define SCSI_LOW_MAX_SELECTION_RETRY 10
/* timeout control macro */
#define SCSI_LOW_TIMEOUT_HZ 10
#define SCSI_LOW_MIN_TOUT 12
#define SCSI_LOW_TIMEOUT_CHECK_INTERVAL 1
#define SCSI_LOW_POWDOWN_TC 15
#define SCSI_LOW_MAX_PHCHANGES 256
#define SCSI2_RESET_DELAY 5000000
/* msg */
#define SCSI_LOW_MAX_MSGLEN 32
#define SCSI_LOW_MSG_LOG_DATALEN 8
/*************************************************
* Scsi Data Pointer
*************************************************/
/* scsi pointer */
struct sc_p {
u_int8_t *scp_data;
int scp_datalen;
u_int8_t *scp_cmd;
int scp_cmdlen;
u_int8_t scp_direction;
#define SCSI_LOW_RWUNK (-1)
#define SCSI_LOW_WRITE 0
#define SCSI_LOW_READ 1
u_int8_t scp_status;
u_int8_t scp_spare[2];
};
/*************************************************
* Command Control Block Structure
*************************************************/
typedef int scsi_low_tag_t;
struct targ_info;
#define SCSI_LOW_UNKLUN ((u_int) -1)
#define SCSI_LOW_UNKTAG ((scsi_low_tag_t) -1)
struct slccb {
TAILQ_ENTRY(slccb) ccb_chain;
void *osdep; /* os depend structure */
struct targ_info *ti; /* targ_info */
struct lun_info *li; /* lun info */
struct buf *bp; /* io bufs */
scsi_low_tag_t ccb_tag; /* effective qtag */
scsi_low_tag_t ccb_otag; /* allocated qtag */
/*****************************************
* Scsi data pointers (original and saved)
*****************************************/
struct sc_p ccb_scp; /* given */
struct sc_p ccb_sscp; /* saved scsi data pointer */
int ccb_datalen; /* transfered data counter */
/*****************************************
* Msgout
*****************************************/
u_int ccb_msgoutflag;
u_int ccb_omsgoutflag;
/*****************************************
* Error or Timeout counters
*****************************************/
u_int ccb_flags;
#define CCB_INTERNAL 0x0001
#define CCB_SENSE 0x0002
#define CCB_CLEARQ 0x0004
#define CCB_DISCQ 0x0008
#define CCB_STARTQ 0x0010
#define CCB_POLLED 0x0100 /* polling ccb */
#define CCB_NORETRY 0x0200 /* do NOT retry */
#define CCB_AUTOSENSE 0x0400 /* do a sence after CA */
#define CCB_URGENT 0x0800 /* an urgent ccb */
#define CCB_NOSDONE 0x1000 /* do not call an os done routine */
#define CCB_SCSIIO 0x2000 /* a normal scsi io coming from upper layer */
#define CCB_SILENT 0x4000 /* no terminate messages */
u_int ccb_error;
int ccb_rcnt; /* retry counter */
int ccb_selrcnt; /* selection retry counter */
int ccb_tc; /* timer counter */
int ccb_tcmax; /* max timeout */
/*****************************************
* Sense data buffer
*****************************************/
u_int8_t ccb_scsi_cmd[12];
struct scsi_sense_data ccb_sense;
};
/*************************************************
* Slccb functions
*************************************************/
GENERIC_CCB_ASSERT(scsi_low, slccb)
/*************************************************
* Target and Lun structures
*************************************************/
struct scsi_low_softc;
LIST_HEAD(scsi_low_softc_tab, scsi_low_softc);
TAILQ_HEAD(targ_info_tab, targ_info);
LIST_HEAD(lun_info_tab, lun_info);
struct lun_info {
int li_lun;
struct targ_info *li_ti; /* my target */
LIST_ENTRY(lun_info) lun_chain; /* targ_info link */
struct slccbtab li_discq; /* disconnect queue */
/*
* qtag control
*/
int li_maxnexus;
int li_maxnqio;
int li_nqio;
int li_disc;
#define SCSI_LOW_MAXNEXUS (sizeof(u_int) * NBBY)
u_int li_qtagbits;
#ifdef SCSI_LOW_ALT_QTAG_ALLOCATE
u_int8_t li_qtagarray[SCSI_LOW_MAXNEXUS];
u_int li_qd;
#endif /* SCSI_LOW_ALT_QTAG_ALLOCATE */
#define SCSI_LOW_QFLAG_CA_QCLEAR 0x01
u_int li_qflags;
/*
* lun state
*/
#define SCSI_LOW_LUN_SLEEP 0x00
#define SCSI_LOW_LUN_START 0x01
#define SCSI_LOW_LUN_INQ 0x02
#define SCSI_LOW_LUN_MODEQ 0x03
#define SCSI_LOW_LUN_OK 0x04
u_int li_state; /* target lun state */
/*
* lun control flags
*/
u_int li_flags_valid; /* valid flags */
#define SCSI_LOW_LUN_FLAGS_USER_VALID 0x0001
#define SCSI_LOW_LUN_FLAGS_DISK_VALID 0x0002
#define SCSI_LOW_LUN_FLAGS_QUIRKS_VALID 0x0004
#define SCSI_LOW_LUN_FLAGS_ALL_VALID \
(SCSI_LOW_LUN_FLAGS_USER_VALID | \
SCSI_LOW_LUN_FLAGS_DISK_VALID | SCSI_LOW_LUN_FLAGS_QUIRKS_VALID)
u_int li_flags; /* real lun control flags */
u_int li_cfgflags; /* lun control flags given by user */
u_int li_diskflags; /* lun control flags given by hardware info */
u_int li_quirks; /* lun control flags given by upper layer */
/* inq buffer */
struct scsi_low_inq_data {
u_int8_t sd_type;
u_int8_t sd_sp1;
u_int8_t sd_version;
u_int8_t sd_resp;
u_int8_t sd_len;
u_int8_t sd_sp2[2];
u_int8_t sd_support;
} __packed li_inq;
/* modeq buffer */
struct scsi_low_mode_sense_data {
u_int8_t sms_header[4];
struct {
u_int8_t cmp_page;
u_int8_t cmp_length;
u_int8_t cmp_rlec;
u_int8_t cmp_qc;
u_int8_t cmp_eca;
u_int8_t cmp_spare[3];
} __packed sms_cmp;
} li_sms;
};
struct scsi_low_msg_log {
int slml_ptr;
struct {
u_int8_t msg[2];
} slml_msg[SCSI_LOW_MSG_LOG_DATALEN];
};
struct targ_info {
TAILQ_ENTRY(targ_info) ti_chain; /* targ_info link */
struct scsi_low_softc *ti_sc; /* our softc */
u_int ti_id; /* scsi id */
/*
* Lun chain
*/
struct lun_info_tab ti_litab; /* lun chain */
/*
* total disconnected nexus
*/
int ti_disc;
/*
* Scsi phase control
*/
#define PH_NULL 0x00
#define PH_ARBSTART 0x01
#define PH_SELSTART 0x02
#define PH_SELECTED 0x03
#define PH_CMD 0x04
#define PH_DATA 0x05
#define PH_MSGIN 0x06
#define PH_MSGOUT 0x07
#define PH_STAT 0x08
#define PH_DISC 0x09
#define PH_RESEL 0x0a
u_int ti_phase; /* scsi phase */
u_int ti_ophase; /* old scsi phase */
/*
* Msg in
*/
u_int ti_msginptr; /* msgin ptr */
u_int ti_msginlen; /* expected msg length */
int ti_msgin_parity_error; /* parity error detected */
u_int8_t ti_msgin[SCSI_LOW_MAX_MSGLEN]; /* msgin buffer */
/*
* Msg out
*/
u_int ti_msgflags; /* msgs to be asserted */
u_int ti_omsgflags; /* msgs asserted */
u_int ti_emsgflags; /* a msg currently asserted */
#define SCSI_LOW_MSG_RESET 0x00000001
#define SCSI_LOW_MSG_REJECT 0x00000002
#define SCSI_LOW_MSG_PARITY 0x00000004
#define SCSI_LOW_MSG_ERROR 0x00000008
#define SCSI_LOW_MSG_IDENTIFY 0x00000010
#define SCSI_LOW_MSG_ABORT 0x00000020
#define SCSI_LOW_MSG_TERMIO 0x00000040
#define SCSI_LOW_MSG_SIMPLE_QTAG 0x00000080
#define SCSI_LOW_MSG_ORDERED_QTAG 0x00000100
#define SCSI_LOW_MSG_HEAD_QTAG 0x00000200
#define SCSI_LOW_MSG_ABORT_QTAG 0x00000400
#define SCSI_LOW_MSG_CLEAR_QTAG 0x00000800
#define SCSI_LOW_MSG_WIDE 0x00001000
#define SCSI_LOW_MSG_SYNCH 0x00002000
#define SCSI_LOW_MSG_NOOP 0x00004000
#define SCSI_LOW_MSG_LAST 0x00008000
#define SCSI_LOW_MSG_ALL 0xffffffff
/* msgout buffer */
u_int8_t ti_msgoutstr[SCSI_LOW_MAX_MSGLEN]; /* scsi msgout */
u_int ti_msgoutlen; /* msgout strlen */
/*
* target initialize msgout
*/
u_int ti_setup_msg; /* setup msgout requests */
u_int ti_setup_msg_done;
/*
* synch and wide data info
*/
u_int ti_flags_valid; /* valid flags */
#define SCSI_LOW_TARG_FLAGS_USER_VALID 0x0001
#define SCSI_LOW_TARG_FLAGS_DISK_VALID 0x0002
#define SCSI_LOW_TARG_FLAGS_QUIRKS_VALID 0x0004
#define SCSI_LOW_TARG_FLAGS_ALL_VALID \
(SCSI_LOW_TARG_FLAGS_USER_VALID | \
SCSI_LOW_TARG_FLAGS_DISK_VALID | SCSI_LOW_TARG_FLAGS_QUIRKS_VALID)
u_int ti_diskflags; /* given target disk flags */
u_int ti_quirks; /* given target quirk */
struct synch {
u_int8_t offset;
u_int8_t period;
} ti_osynch, ti_maxsynch; /* synch data */
#define SCSI_LOW_BUS_WIDTH_8 0
#define SCSI_LOW_BUS_WIDTH_16 1
#define SCSI_LOW_BUS_WIDTH_32 2
u_int ti_owidth, ti_width;
/*
* lun info size.
*/
int ti_lunsize;
#ifdef SCSI_LOW_DIAGNOSTIC
struct scsi_low_msg_log ti_log_msgout;
struct scsi_low_msg_log ti_log_msgin;
#endif /* SCSI_LOW_DIAGNOSTIC */
};
/*************************************************
* COMMON HEADER STRUCTURE
*************************************************/
struct scsi_low_softc;
struct proc;
typedef struct scsi_low_softc *sc_low_t;
#define SCSI_LOW_START_OK 0
#define SCSI_LOW_START_FAIL 1
#define SCSI_LOW_INFO_ALLOC 0
#define SCSI_LOW_INFO_REVOKE 1
#define SCSI_LOW_INFO_DEALLOC 2
#define SCSI_LOW_POWDOWN 1
#define SCSI_LOW_ENGAGE 2
#define SC_LOW_INIT_T (int (*)(sc_low_t, int))
#define SC_LOW_BUSRST_T (void (*)(sc_low_t))
#define SC_LOW_TARG_INIT_T (int (*)(sc_low_t, struct targ_info *, int))
#define SC_LOW_LUN_INIT_T (int (*)(sc_low_t, struct targ_info *, struct lun_info *, int))
#define SC_LOW_SELECT_T (int (*)(sc_low_t, struct slccb *))
#define SC_LOW_ATTEN_T (void (*)(sc_low_t))
#define SC_LOW_NEXUS_T (int (*)(sc_low_t))
#define SC_LOW_MSG_T (int (*)(sc_low_t, struct targ_info *, u_int))
#define SC_LOW_POLL_T (int (*)(void *))
#define SC_LOW_POWER_T (int (*)(sc_low_t, u_int))
#define SC_LOW_TIMEOUT_T (int (*)(sc_low_t))
struct scsi_low_funcs {
int (*scsi_low_init)(sc_low_t, int);
void (*scsi_low_bus_reset)(sc_low_t);
int (*scsi_low_targ_init)(sc_low_t, struct targ_info *, int);
int (*scsi_low_lun_init)(sc_low_t, struct targ_info *, struct lun_info *, int);
int (*scsi_low_start_bus)(sc_low_t, struct slccb *);
int (*scsi_low_establish_lun_nexus)(sc_low_t);
int (*scsi_low_establish_ccb_nexus)(sc_low_t);
void (*scsi_low_attention)(sc_low_t);
int (*scsi_low_msg)(sc_low_t, struct targ_info *, u_int);
int (*scsi_low_timeout)(sc_low_t);
int (*scsi_low_poll)(void *);
int (*scsi_low_power)(sc_low_t, u_int);
int (*scsi_low_ioctl)(sc_low_t, u_long, caddr_t, int, struct proc *);
};
struct scsi_low_softc {
device_t sl_dev;
struct cam_sim *sl_sim;
struct cam_path *sl_path;
int sl_poll_count;
struct mtx sl_lock;
struct callout sl_engage_timer;
struct callout sl_timeout_timer;
#ifdef SCSI_LOW_POWFUNC
struct callout sl_recover_timer;
#endif
/* our chain */
LIST_ENTRY(scsi_low_softc) sl_chain;
/* my targets */
struct targ_info *sl_ti[SCSI_LOW_NTARGETS];
struct targ_info_tab sl_titab;
/* current active T_L_Q nexus */
struct targ_info *sl_Tnexus; /* Target nexus */
struct lun_info *sl_Lnexus; /* Lun nexus */
struct slccb *sl_Qnexus; /* Qtag nexus */
int sl_nexus_call;
/* ccb start queue */
struct slccbtab sl_start;
/* retry limit and phase change counter */
int sl_max_retry;
int sl_ph_count;
int sl_timeout_count;
/* selection & total num disconnect targets */
int sl_nio;
int sl_disc;
int sl_retry_sel;
struct slccb *sl_selid;
/* attention */
int sl_atten; /* ATN asserted */
int sl_clear_atten; /* negate ATN required */
/* scsi phase suggested by scsi msg */
u_int sl_msgphase;
#define MSGPH_NULL 0x00 /* no msg */
#define MSGPH_DISC 0x01 /* disconnect msg */
#define MSGPH_CMDC 0x02 /* cmd complete msg */
#define MSGPH_ABORT 0x03 /* abort seq */
#define MSGPH_TERM 0x04 /* current io terminate */
#define MSGPH_LCTERM 0x05 /* cmd link terminated */
#define MSGPH_RESET 0x06 /* reset target */
/* error */
u_int sl_error; /* error flags */
#define FATALIO 0x0001 /* generic io error & retry io */
#define ABORTIO 0x0002 /* generic io error & terminate io */
#define TIMEOUTIO 0x0004 /* watch dog timeout */
#define SELTIMEOUTIO 0x0008 /* selection timeout */
#define PDMAERR 0x0010 /* dma xfer error */
#define MSGERR 0x0020 /* msgsys error */
#define PARITYERR 0x0040 /* parity error */
#define BUSYERR 0x0080 /* target busy error */
#define STATERR 0x0100 /* status error */
#define UACAERR 0x0200 /* target CA state, no sense check */
#define SENSEIO 0x1000 /* cmd not excuted but sense data ok */
#define SENSEERR 0x2000 /* cmd not excuted and sense data bad */
#define UBFERR 0x4000 /* unexpected bus free */
#define PENDINGIO 0x8000 /* ccb start not yet */
#define SCSI_LOW_ERRORBITS "\020\017ubferr\016senseerr\015senseio\012uacaerr\011staterr\010busy\007parity\006msgerr\005pdmaerr\004seltimeout\003timeout\002abort\001fatal"
/* current scsi data pointer */
struct sc_p sl_scp;
/* power control */
u_int sl_active; /* host is busy state */
int sl_powc; /* power down timer counter */
u_int sl_rstep; /* resume step */
/* configuration flags */
u_int sl_flags;
#define HW_POWDOWN 0x0001
#define HW_RESUME 0x0002
#define HW_PDMASTART 0x0004
#define HW_INACTIVE 0x0008
#define HW_POWERCTRL 0x0010
#define HW_INITIALIZING 0x0020
#define HW_READ_PADDING 0x1000
#define HW_WRITE_PADDING 0x2000
u_int sl_cfgflags;
#define CFG_NODISC 0x0001
#define CFG_NOPARITY 0x0002
#define CFG_NOATTEN 0x0004
#define CFG_ASYNC 0x0008
#define CFG_NOQTAG 0x0010
int sl_show_result;
#define SHOW_SYNCH_NEG 0x0001
#define SHOW_WIDE_NEG 0x0002
#define SHOW_CALCF_RES 0x0010
#define SHOW_PROBE_RES 0x0020
#define SHOW_ALL_NEG -1
/* host informations */
u_int sl_hostid;
int sl_nluns;
int sl_ntargs;
int sl_openings;
/* interface functions */
struct scsi_low_funcs *sl_funcs;
/* targinfo size */
int sl_targsize;
};
#define SCSI_LOW_LOCK(sl) mtx_lock(&(sl)->sl_lock)
#define SCSI_LOW_UNLOCK(sl) mtx_unlock(&(sl)->sl_lock)
#define SCSI_LOW_ASSERT_LOCKED(sl) mtx_assert(&(sl)->sl_lock, MA_OWNED)
/*************************************************
* SCSI LOW service functions
*************************************************/
/*
* Scsi low attachment function.
*/
int scsi_low_attach(struct scsi_low_softc *, int, int, int, int, int);
int scsi_low_detach(struct scsi_low_softc *);
/*
* Scsi low interface activate or deactivate functions
*/
int scsi_low_is_busy(struct scsi_low_softc *);
int scsi_low_activate(struct scsi_low_softc *);
int scsi_low_deactivate(struct scsi_low_softc *);
/*
* Scsi phase "bus service" functions.
* These functions are corresponding to each scsi bus phaeses.
*/
/* bus idle phase (other initiators or targets release bus) */
void scsi_low_bus_idle(struct scsi_low_softc *);
/* arbitration and selection phase */
void scsi_low_arbit_fail(struct scsi_low_softc *, struct slccb *);
static __inline void scsi_low_arbit_win(struct scsi_low_softc *);
/* msgout phase */
#define SCSI_LOW_MSGOUT_INIT 0x00000001
#define SCSI_LOW_MSGOUT_UNIFY 0x00000002
int scsi_low_msgout(struct scsi_low_softc *, struct targ_info *, u_int);
/* msgin phase */
#define SCSI_LOW_DATA_PE 0x80000000
int scsi_low_msgin(struct scsi_low_softc *, struct targ_info *, u_int);
/* statusin phase */
static __inline int scsi_low_statusin(struct scsi_low_softc *, struct targ_info *, u_int);
/* data phase */
int scsi_low_data(struct scsi_low_softc *, struct targ_info *, struct buf **, int);
static __inline void scsi_low_data_finish(struct scsi_low_softc *);
/* cmd phase */
int scsi_low_cmd(struct scsi_low_softc *, struct targ_info *);
/* reselection phase */
struct targ_info *scsi_low_reselected(struct scsi_low_softc *, u_int);
/* disconnection phase */
int scsi_low_disconnected(struct scsi_low_softc *, struct targ_info *);
/*
* Scsi bus restart function.
* Canncel all established nexuses => scsi system initialized => restart jobs.
*/
#define SCSI_LOW_RESTART_HARD 1
#define SCSI_LOW_RESTART_SOFT 0
int scsi_low_restart(struct scsi_low_softc *, int, u_char *);
/*
* Scsi utility fucntions
*/
/* print current status */
void scsi_low_print(struct scsi_low_softc *, struct targ_info *);
/* bus reset utility */
void scsi_low_bus_reset(struct scsi_low_softc *);
/*************************************************
* Message macro defs
*************************************************/
#define SCSI_LOW_SETUP_PHASE(ti, phase) \
{ \
(ti)->ti_ophase = ti->ti_phase; \
(ti)->ti_phase = (phase); \
}
#define SCSI_LOW_SETUP_MSGPHASE(slp, PHASE) \
{ \
(slp)->sl_msgphase = (PHASE); \
}
#define SCSI_LOW_ASSERT_ATN(slp) \
{ \
(slp)->sl_atten = 1; \
}
#define SCSI_LOW_DEASSERT_ATN(slp) \
{ \
(slp)->sl_atten = 0; \
}
/*************************************************
* Inline functions
*************************************************/
static __inline void scsi_low_attention(struct scsi_low_softc *);
static __inline int scsi_low_is_msgout_continue(struct targ_info *, u_int);
static __inline int scsi_low_assert_msg(struct scsi_low_softc *, struct targ_info *, u_int, int);
static __inline int scsi_low_is_disconnect_ok(struct slccb *);
static __inline int
scsi_low_is_msgout_continue(ti, mask)
struct targ_info *ti;
u_int mask;
{
return ((ti->ti_msgflags & (~mask)) != 0);
}
static __inline int
scsi_low_is_disconnect_ok(cb)
struct slccb *cb;
{
return ((cb->li->li_flags & SCSI_LOW_DISC) != 0 &&
(cb->ccb_flags & (CCB_SENSE | CCB_CLEARQ)) == 0);
}
static __inline void
scsi_low_attention(slp)
struct scsi_low_softc *slp;
{
if (slp->sl_atten != 0)
return;
(*slp->sl_funcs->scsi_low_attention) (slp);
SCSI_LOW_ASSERT_ATN(slp);
}
static __inline int
scsi_low_assert_msg(slp, ti, msg, now)
struct scsi_low_softc *slp;
struct targ_info *ti;
u_int msg;
int now;
{
ti->ti_msgflags |= msg;
if (now != 0)
scsi_low_attention(slp);
return 0;
}
static __inline void
scsi_low_arbit_win(slp)
struct scsi_low_softc *slp;
{
slp->sl_selid = NULL;
}
static __inline void
scsi_low_data_finish(slp)
struct scsi_low_softc *slp;
{
if (slp->sl_Qnexus != NULL)
{
slp->sl_Qnexus->ccb_datalen = slp->sl_scp.scp_datalen;
}
}
static __inline int
scsi_low_statusin(slp, ti, c)
struct scsi_low_softc *slp;
struct targ_info *ti;
u_int c;
{
slp->sl_ph_count ++;
if ((c & SCSI_LOW_DATA_PE) != 0)
{
scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ERROR, 0);
return EIO;
}
slp->sl_scp.scp_status = (u_int8_t) c;
return 0;
}
/*************************************************
* Message out defs
*************************************************/
/* XXX: use scsi_message.h */
#define ST_GOOD 0x00
#define ST_CHKCOND 0x02
#define ST_MET 0x04
#define ST_BUSY 0x08
#define ST_INTERGOOD 0x10
#define ST_INTERMET 0x14
#define ST_CONFLICT 0x18
#define ST_CMDTERM 0x22
#define ST_QUEFULL 0x28
#define ST_UNKNOWN 0xff
#define MSG_COMP 0x00
#define MSG_EXTEND 0x01
#define MKMSG_EXTEND(XLEN, XCODE) ((((u_int)(XLEN)) << NBBY) | ((u_int)(XCODE)))
#define MSG_EXTEND_MDPCODE 0x00
#define MSG_EXTEND_MDPLEN 0x05
#define MSG_EXTEND_SYNCHCODE 0x01
#define MSG_EXTEND_SYNCHLEN 0x03
#define MSG_EXTEND_WIDECODE 0x03
#define MSG_EXTEND_WIDELEN 0x02
#define MSG_SAVESP 0x02
#define MSG_RESTORESP 0x03
#define MSG_DISCON 0x04
#define MSG_I_ERROR 0x05
#define MSG_ABORT 0x06
#define MSG_REJECT 0x07
#define MSG_NOOP 0x08
#define MSG_PARITY 0x09
#define MSG_LCOMP 0x0a
#define MSG_LCOMP_F 0x0b
#define MSG_RESET 0x0c
#define MSG_ABORT_QTAG 0x0d
#define MSG_CLEAR_QTAG 0x0e
#define MSG_TERM_IO 0x11
#define MSG_SIMPLE_QTAG 0x20
#define MSG_HEAD_QTAG 0x21
#define MSG_ORDERED_QTAG 0x22
#define MSG_IDENTIFY 0x80
#define MSG_IDENTIFY_DISCPRIV 0x40
#endif /* !_SCSI_LOW_H_ */
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