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/* $OpenBSD: aic6250var.h,v 1.2 2013/10/23 10:07:14 miod Exp $ */
/*
* Copyright (c) 2010, 2013 Miodrag Vallat.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Derived from sys/dev/ic/aic6360var.h under the following licence terms:
*/
/* OpenBSD: aic6360var.h,v 1.8 2011/04/06 18:14:35 miod Exp */
/* $NetBSD: aic6360.c,v 1.52 1996/12/10 21:27:51 thorpej Exp $ */
/*
* Copyright (c) 1994, 1995, 1996 Charles Hannum. 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Charles M. Hannum.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Copyright (c) 1994 Jarle Greipsland
* 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.
*/
/*
* Acknowledgements: Many of the algorithms used in this driver are
* inspired by the work of Julian Elischer (julian@tfs.com) and
* Charles Hannum (mycroft@duality.gnu.ai.mit.edu). Thanks a million!
*/
/*
* ACB. Holds additional information for each SCSI command Comments: We
* need a separate scsi command block because we may need to overwrite it
* with a request sense command. Basicly, we refrain from fiddling with
* the scsi_xfer struct (except do the expected updating of return values).
* We'll generally update: xs->{flags,resid,error,sense,status} and
* occasionally xs->retries.
*/
struct aic6250_acb {
struct scsi_generic scsi_cmd;
int scsi_cmd_length;
void *data_addr; /* Saved data pointer */
int data_length; /* Residue */
uint8_t target_stat; /* SCSI status byte */
TAILQ_ENTRY(aic6250_acb) chain;
struct scsi_xfer *xs; /* SCSI xfer ctrl block from above */
int flags;
#define ACB_ALLOC 0x01
#define ACB_NEXUS 0x02
#define ACB_SENSE 0x04
#define ACB_ABORT 0x40
#define ACB_RESET 0x80
int timeout;
};
/*
* Some info about each (possible) target on the SCSI bus. This should
* probably have been a "per target+lunit" structure, but we'll leave it at
* this for now.
*/
struct aic6250_tinfo {
int cmds; /* #commands processed */
int dconns; /* #disconnects */
int touts; /* #timeouts */
int perrs; /* #parity errors */
int senses; /* #request sense commands sent */
ushort lubusy; /* What local units/subr. are busy? */
uint8_t flags;
#define DO_SYNC 0x01 /* (Re)Negotiate synchronous options */
#define DO_WIDE 0x02 /* (Re)Negotiate wide options */
uint8_t period; /* Period suggestion */
uint8_t offset; /* Offset suggestion */
uint8_t width; /* Width suggestion */
};
struct aic6250_softc {
struct device sc_dev;
uint8_t (*sc_read)(struct aic6250_softc *, uint);
void (*sc_write)(struct aic6250_softc *, uint, uint8_t);
struct scsi_link sc_link; /* prototype for subdevs */
TAILQ_HEAD(, aic6250_acb) free_list, ready_list, nexus_list;
struct aic6250_acb *sc_nexus; /* current command */
struct aic6250_acb sc_acb[8];
struct aic6250_tinfo sc_tinfo[8];
struct mutex sc_acb_mtx;
struct scsi_iopool sc_iopool;
/* Data about the current nexus (updated for every cmd switch) */
u_char *sc_dp; /* Current data pointer */
size_t sc_dleft; /* Data bytes left to transfer */
u_char *sc_cp; /* Current command pointer */
size_t sc_cleft; /* Command bytes left to transfer */
/* Adapter state */
uint8_t sc_phase; /* Current bus phase */
uint8_t sc_prevphase; /* Previous bus phase */
uint8_t sc_state; /* State applicable to the adapter */
#define AIC_INIT 0
#define AIC_IDLE 1
#define AIC_SELECTING 2 /* SCSI command is arbiting */
#define AIC_RESELECTED 3 /* Has been reselected */
#define AIC_CONNECTED 4 /* Actively using the SCSI bus */
#define AIC_DISCONNECT 5 /* MSG_DISCONNECT received */
#define AIC_CMDCOMPLETE 6 /* MSG_CMDCOMPLETE received */
#define AIC_CLEANING 7
uint8_t sc_flags;
#define AIC_DROP_MSGIN 0x01 /* Discard all msgs (parity err detected) */
#define AIC_ABORTING 0x02 /* Bailing out */
#define AIC_DOINGDMA 0x04 /* The FIFO data path is active! */
uint8_t sc_selid; /* Reselection ID */
uint8_t sc_imr0;
uint8_t sc_imr1;
uint8_t sc_cr0;
uint8_t sc_cr1;
struct timeout sc_seltimeout;
uint sc_selto; /* Selection timeout (when polling) */
/* Message stuff */
uint8_t sc_msgpriq; /* Messages we want to send */
uint8_t sc_msgoutq; /* Messages sent during last MESSAGE OUT */
uint8_t sc_lastmsg; /* Message last transmitted */
uint8_t sc_currmsg; /* Message currently ready to transmit */
#define SEND_DEV_RESET 0x01
#define SEND_PARITY_ERROR 0x02
#define SEND_INIT_DET_ERR 0x04
#define SEND_REJECT 0x08
#define SEND_IDENTIFY 0x10
#define SEND_ABORT 0x20
#define SEND_SDTR 0x40
#define SEND_WDTR 0x80
#define AIC_MAX_MSG_LEN 8
uint8_t sc_omess[AIC_MAX_MSG_LEN];
uint8_t *sc_omp; /* Outgoing message pointer */
uint8_t sc_imess[AIC_MAX_MSG_LEN];
uint8_t *sc_imp; /* Incoming message pointer */
/* Hardware stuff */
int sc_initiator; /* Our scsi id */
int sc_freq; /* Clock frequency in MHz */
int sc_minsync; /* Minimum sync period / 4 */
int sc_maxsync; /* Maximum sync period / 4 */
/* DMA function set from MD code */
int (*sc_dma_start)(struct aic6250_softc *, void *, size_t, int);
int (*sc_dma_done)(struct aic6250_softc *);
};
#if AIC_DEBUG
#define AIC_SHOWACBS 0x01
#define AIC_SHOWINTS 0x02
#define AIC_SHOWCMDS 0x04
#define AIC_SHOWMISC 0x08
#define AIC_SHOWTRACE 0x10
#define AIC_SHOWSTART 0x20
#define AIC_DOBREAK 0x40
#define AIC_PRINT(b, s) do {if ((aic6250_debug & (b)) != 0) printf s;} while (0)
#define AIC_BREAK() \
do { if ((aic6250_debug & AIC_DOBREAK) != 0) Debugger(); } while (0)
#define AIC_ASSERT(x) \
do { \
if (!(x)) { \
printf("%s at line %d: assertion failed\n", \
sc->sc_dev.dv_xname, __LINE__); \
Debugger(); \
} \
} while (0)
#else
#define AIC_PRINT(b, s)
#define AIC_BREAK()
#define AIC_ASSERT(x)
#endif
#define AIC_ACBS(s) AIC_PRINT(AIC_SHOWACBS, s)
#define AIC_INTS(s) AIC_PRINT(AIC_SHOWINTS, s)
#define AIC_CMDS(s) AIC_PRINT(AIC_SHOWCMDS, s)
#define AIC_MISC(s) AIC_PRINT(AIC_SHOWMISC, s)
#define AIC_TRACE(s) AIC_PRINT(AIC_SHOWTRACE, s)
#define AIC_START(s) AIC_PRINT(AIC_SHOWSTART, s)
void aic6250_attach(struct aic6250_softc *);
int aic6250_intr(void *);
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