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/* $NetBSD: espvar.h,v 1.13 1996/05/16 20:31:30 pk Exp $ */
/*
* Copyright (c) 1994 Peter Galbavy. 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 Peter Galbavy.
* 4. 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.
*/
#define ESP_DEBUG 0
#define FREQTOCCF(freq) (((freq + 4) / 5))
/* esp revisions */
#define ESP100 0x01
#define ESP100A 0x02
#define ESP200 0x03
#if 0
typedef caddr_t physaddr;
struct esp_dma_seg {
physaddr addr;
long len;
};
#endif
/*
* ECB. 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 ecb {
TAILQ_ENTRY(ecb) chain;
struct scsi_xfer *xs; /* SCSI xfer ctrl block from above */
int flags; /* Status */
#define ECB_QNONE 0
#define ECB_QFREE 1
#define ECB_QREADY 2
#define ECB_QNEXUS 3
#define ECB_QBITS 0x07
#define ECB_CHKSENSE 0x08
#define ECB_ABORTED 0x10
#define ECB_SETQ(e, q) do (e)->flags = ((e)->flags&~ECB_QBITS)|(q); while(0)
struct scsi_generic cmd; /* SCSI command block */
int clen;
char *daddr; /* Saved data pointer */
int dleft; /* Residue */
u_char stat; /* SCSI status byte */
#if ESP_DEBUG > 0
char trace[1000];
#endif
};
#if ESP_DEBUG > 0
#define ECB_TRACE(ecb, msg, a, b) do { \
const char *f = "[" msg "]"; \
int n = strlen((ecb)->trace); \
if (n < (sizeof((ecb)->trace)-100)) \
sprintf((ecb)->trace + n, f, a, b); \
} while(0)
#else
#define ECB_TRACE(ecb, msg, a, b)
#endif
/*
* 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. Is there a way to reliably hook it up to sc->fordriver??
*/
struct esp_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? */
u_char flags;
#define T_NEED_TO_RESET 0x01 /* Should send a BUS_DEV_RESET */
#define T_NEGOTIATE 0x02 /* (Re)Negotiate synchronous options */
#define T_BUSY 0x04 /* Target is busy, i.e. cmd in progress */
#define T_SYNCMODE 0x08 /* sync mode has been negotiated */
#define T_SYNCHOFF 0x10 /* .. */
#define T_RSELECTOFF 0x20 /* .. */
u_char period; /* Period suggestion */
u_char offset; /* Offset suggestion */
} tinfo_t;
/* Register a linenumber (for debugging) */
#define LOGLINE(p)
#define ESP_SHOWECBS 0x01
#define ESP_SHOWINTS 0x02
#define ESP_SHOWCMDS 0x04
#define ESP_SHOWMISC 0x08
#define ESP_SHOWTRAC 0x10
#define ESP_SHOWSTART 0x20
#define ESP_SHOWPHASE 0x40
#define ESP_SHOWDMA 0x80
#define ESP_SHOWCCMDS 0x100
#define ESP_SHOWMSGS 0x200
#ifdef ESP_DEBUG
extern int esp_debug;
#define ESP_ECBS(str) do {if (esp_debug & ESP_SHOWECBS) printf str;} while (0)
#define ESP_MISC(str) do {if (esp_debug & ESP_SHOWMISC) printf str;} while (0)
#define ESP_INTS(str) do {if (esp_debug & ESP_SHOWINTS) printf str;} while (0)
#define ESP_TRACE(str) do {if (esp_debug & ESP_SHOWTRAC) printf str;} while (0)
#define ESP_CMDS(str) do {if (esp_debug & ESP_SHOWCMDS) printf str;} while (0)
#define ESP_START(str) do {if (esp_debug & ESP_SHOWSTART) printf str;}while (0)
#define ESP_PHASE(str) do {if (esp_debug & ESP_SHOWPHASE) printf str;}while (0)
#define ESP_DMA(str) do {if (esp_debug & ESP_SHOWDMA) printf str;}while (0)
#define ESP_MSGS(str) do {if (esp_debug & ESP_SHOWMSGS) printf str;}while (0)
#else
#define ESP_ECBS(str)
#define ESP_MISC(str)
#define ESP_INTS(str)
#define ESP_TRACE(str)
#define ESP_CMDS(str)
#define ESP_START(str)
#define ESP_PHASE(str)
#define ESP_DMA(str)
#endif
#define ESP_MAX_MSG_LEN 8
struct esp_softc {
struct device sc_dev; /* us as a device */
struct sbusdev sc_sd; /* sbus device */
struct intrhand sc_ih; /* intr handler */
struct evcnt sc_intrcnt; /* intr count */
struct scsi_link sc_link; /* scsi lint struct */
volatile u_char *sc_reg; /* the registers */
struct dma_softc *sc_dma; /* pointer to my dma */
/* register defaults */
u_char sc_cfg1; /* Config 1 */
u_char sc_cfg2; /* Config 2, not ESP100 */
u_char sc_cfg3; /* Config 3, only ESP200 */
u_char sc_ccf; /* Clock Conversion */
u_char sc_timeout;
/* register copies, see espreadregs() */
u_char sc_espintr;
u_char sc_espstat;
u_char sc_espstep;
u_char sc_espfflags;
/* Lists of command blocks */
TAILQ_HEAD(ecb_list, ecb) free_list,
ready_list,
nexus_list;
struct ecb *sc_nexus; /* current command */
struct ecb sc_ecb[8]; /* one per target */
struct esp_tinfo sc_tinfo[8];
/* Data about the current nexus (updated for every cmd switch) */
caddr_t sc_dp; /* Current data pointer */
ssize_t sc_dleft; /* Data left to transfer */
/* Adapter state */
int sc_phase; /* Copy of what bus phase we are in */
int sc_prevphase; /* Copy of what bus phase we were in */
u_char sc_state; /* State applicable to the adapter */
u_char sc_flags;
u_char sc_selid;
u_char sc_lastcmd;
/* Message stuff */
u_char sc_msgpriq; /* One or more messages to send (encoded) */
u_char sc_msgout; /* What message is on its way out? */
u_char sc_omess[ESP_MAX_MSG_LEN];
caddr_t sc_omp; /* Message pointer (for multibyte messages) */
size_t sc_omlen;
u_char sc_imess[ESP_MAX_MSG_LEN + 1];
caddr_t sc_imp; /* Message pointer (for multibyte messages) */
size_t sc_imlen;
/* hardware/openprom stuff */
int sc_node; /* PROM node ID */
int sc_freq; /* Freq in HZ */
int sc_pri; /* SBUS priority */
int sc_id; /* our scsi id */
int sc_rev; /* esp revision */
int sc_minsync; /* minimum sync period / 4 */
int sc_maxxfer; /* maximum transfer size */
};
/*
* Macros to read and write the chip's registers.
*/
#define ESP_READ_REG(sc, reg) \
((sc)->sc_reg[(reg) * 4])
#define ESP_WRITE_REG(sc, reg, val) \
do { \
u_char v = (val); \
(sc)->sc_reg[(reg) * 4] = v; \
} while (0)
/* values for sc_state */
#define ESP_IDLE 0x01 /* waiting for something to do */
#define ESP_TMP_UNAVAIL 0x02 /* Don't accept SCSI commands */
#define ESP_SELECTING 0x03 /* SCSI command is arbiting */
#define ESP_RESELECTED 0x04 /* Has been reselected */
#define ESP_HASNEXUS 0x05 /* Actively using the SCSI bus */
#define ESP_CLEANING 0x06
#define ESP_SBR 0x07 /* Expect a SCSI RST because we commanded it */
/* values for sc_flags */
#define ESP_DROP_MSGI 0x01 /* Discard all msgs (parity err detected) */
#define ESP_DOINGDMA 0x02 /* The FIFO data path is active! */
#define ESP_BUSFREE_OK 0x04 /* Bus free phase is OK. */
#define ESP_SYNCHNEGO 0x08 /* Synch negotiation in progress. */
/*#define ESP_BLOCKED 0x10 * Don't schedule new scsi bus operations */
#define ESP_DISCON 0x10 /* Target sent DISCONNECT msg */
#define ESP_ABORTING 0x20 /* Bailing out */
#define ESP_ICCS 0x40 /* Expect status phase results */
#define ESP_WAITI 0x80 /* Waiting for non-DMA data to arrive */
/* values for sc_msgout */
#define SEND_DEV_RESET 0x01
#define SEND_PARITY_ERROR 0x02
#define SEND_ABORT 0x04
#define SEND_REJECT 0x08
#define SEND_INIT_DET_ERR 0x10
#define SEND_IDENTIFY 0x20
#define SEND_SDTR 0x40
/* SCSI Status codes */
#define ST_GOOD 0x00
#define ST_CHKCOND 0x02
#define ST_CONDMET 0x04
#define ST_BUSY 0x08
#define ST_INTERMED 0x10
#define ST_INTERMED_CONDMET 0x14
#define ST_RESERVATION_CONFLICT 0x18
#define ST_CMD_TERM 0x22
#define ST_QUEUE_FULL 0x28
#define ST_MASK 0x3e /* bit 0,6,7 is reserved */
/* phase bits */
#define IOI 0x01
#define CDI 0x02
#define MSGI 0x04
/* Information transfer phases */
#define DATA_OUT_PHASE (0)
#define DATA_IN_PHASE (IOI)
#define COMMAND_PHASE (CDI)
#define STATUS_PHASE (CDI|IOI)
#define MESSAGE_OUT_PHASE (MSGI|CDI)
#define MESSAGE_IN_PHASE (MSGI|CDI|IOI)
#define PHASE_MASK (MSGI|CDI|IOI)
/* Some pseudo phases for getphase()*/
#define BUSFREE_PHASE 0x100 /* Re/Selection no longer valid */
#define INVALID_PHASE 0x101 /* Re/Selection valid, but no REQ yet */
#define PSEUDO_PHASE 0x100 /* "pseudo" bit */
#ifdef ESP_DEBUG
#define ESPCMD(sc, cmd) do { \
if (esp_debug & ESP_SHOWCCMDS) \
printf("<cmd:0x%x>", (unsigned)cmd); \
sc->sc_lastcmd = cmd; \
ESP_WRITE_REG(sc, ESP_CMD, cmd); \
} while (0)
#else
#define ESPCMD(sc, cmd) ESP_WRITE_REG(sc, ESP_CMD, cmd)
#endif
#define SAME_ESP(sc, bp, ca) \
((bp->val[0] == ca->ca_slot && bp->val[1] == ca->ca_offset) || \
(bp->val[0] == -1 && bp->val[1] == sc->sc_dev.dv_unit))
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