c0c45bba22
get an "Illegal command" (why is this?) when we try to pull it in. On detection of this condition, we reset the SCSI bus and simply stop asking this target for an identify messages, for now.
318 lines
11 KiB
C
318 lines
11 KiB
C
/* $NetBSD: espvar.h,v 1.4 1995/06/02 15:46:47 pk Exp $ */
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/*
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* Copyright (c) 1994 Peter Galbavy. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Peter Galbavy.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define ESP_SYNC_REQ_ACK_OFS 0
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#define ESP_DEBUG 0
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#define FREQTOCCF(freq) (((freq + 4) / 5))
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#define ESP_DEF_TIMEOUT 153
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/* esp revisions */
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#define ESP100 0x01
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#define ESP100A 0x02
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#define ESP200 0x03
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/* Grabbed from Julians SCSI aha-drivers */
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#ifdef DDB
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int Debugger();
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#else DDB
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#define Debugger() panic("should call debugger here (esp.c)")
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#endif DDB
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typedef caddr_t physaddr;
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struct esp_dma_seg {
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physaddr addr;
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long len;
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};
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extern int delaycount;
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#define FUDGE(X) ((X)>>1) /* get 1 ms spincount */
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#define MINIFUDGE(X) ((X)>>4) /* get (approx) 125us spincount */
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#define NUM_CONCURRENT 7 /* Only one per target for now */
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/*
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* ECB. Holds additional information for each SCSI command Comments: We
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* need a separate scsi command block because we may need to overwrite it
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* with a request sense command. Basicly, we refrain from fiddling with
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* the scsi_xfer struct (except do the expected updating of return values).
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* We'll generally update: xs->{flags,resid,error,sense,status} and
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* occasionally xs->retries.
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*/
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struct ecb {
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TAILQ_ENTRY(ecb) chain;
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struct scsi_xfer *xs; /* SCSI xfer ctrl block from above */
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int flags; /* Status */
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#define ECB_FREE 0x00
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#define ECB_ACTIVE 0x01
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#define ECB_DONE 0x04
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#define ECB_CHKSENSE 0x08
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struct scsi_generic cmd; /* SCSI command block */
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int clen;
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char *daddr; /* Saved data pointer */
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int dleft; /* Residue */
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u_char stat; /* SCSI status byte */
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};
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/*
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* Some info about each (possible) target on the SCSI bus. This should
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* probably have been a "per target+lunit" structure, but we'll leave it at
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* this for now. Is there a way to reliably hook it up to sc->fordriver??
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*/
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struct esp_tinfo {
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int cmds; /* #commands processed */
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int dconns; /* #disconnects */
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int touts; /* #timeouts */
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int perrs; /* #parity errors */
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int senses; /* #request sense commands sent */
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ushort lubusy; /* What local units/subr. are busy? */
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u_char flags;
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#define NEED_TO_RESET 0x01 /* Should send a BUS_DEV_RESET */
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#define DO_NEGOTIATE 0x02 /* (Re)Negotiate synchronous options */
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#define TARGET_BUSY 0x04 /* Target is busy, i.e. cmd in progress */
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#define T_XXX 0x08 /* Target is XXX */
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u_char period; /* Period suggestion */
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u_char offset; /* Offset suggestion */
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} tinfo_t;
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/* Register a linenumber (for debugging) */
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#define LOGLINE(p)
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#define ESP_SHOWECBS 0x01
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#define ESP_SHOWINTS 0x02
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#define ESP_SHOWCMDS 0x04
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#define ESP_SHOWMISC 0x08
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#define ESP_SHOWTRAC 0x10
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#define ESP_SHOWSTART 0x20
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#define ESP_SHOWPHASE 0x40
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#if ESP_DEBUG
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#define ESP_ECBS(str) do {if (esp_debug & ESP_SHOWECBS) printf str;} while (0)
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#define ESP_MISC(str) do {if (esp_debug & ESP_SHOWMISC) printf str;} while (0)
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#define ESP_INTS(str) do {if (esp_debug & ESP_SHOWINTS) printf str;} while (0)
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#define ESP_TRACE(str) do {if (esp_debug & ESP_SHOWTRAC) printf str;} while (0)
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#define ESP_CMDS(str) do {if (esp_debug & ESP_SHOWCMDS) printf str;} while (0)
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#define ESP_START(str) do {if (esp_debug & ESP_SHOWSTART) printf str;}while (0)
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#define ESP_PHASE(str) do {if (esp_debug & ESP_SHOWPHASE) printf str;}while (0)
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#else
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#define ESP_ECBS(str)
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#define ESP_MISC(str)
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#define ESP_INTS(str)
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#define ESP_TRACE(str)
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#define ESP_CMDS(str)
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#define ESP_START(str)
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#define ESP_PHASE(str)
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#endif
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#define ESP_MAX_MSG_LEN 8
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struct esp_softc {
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struct device sc_dev; /* us as a device */
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struct sbusdev sc_sd; /* sbus device */
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struct intrhand sc_ih; /* intr handler */
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struct evcnt sc_intrcnt; /* intr count */
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struct scsi_link sc_link; /* scsi lint struct */
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volatile caddr_t sc_reg; /* the registers */
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struct dma_softc *sc_dma; /* pointer to my dma */
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/* register defaults */
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u_char sc_cfg1; /* Config 1 */
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u_char sc_cfg2; /* Config 2, not ESP100 */
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u_char sc_cfg3; /* Config 3, only ESP200 */
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u_char sc_ccf; /* Clock Conversion */
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u_char sc_timeout;
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/* register copies, see espreadregs() */
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u_char sc_espintr;
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u_char sc_espstat;
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u_char sc_espstep;
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u_char sc_espfflags;
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/* the current boot path component */
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struct bootpath *sc_bp;
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/* Lists of command blocks */
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TAILQ_HEAD(ecb_list, ecb) free_list,
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ready_list,
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nexus_list;
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struct ecb *sc_nexus; /* current command */
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struct ecb sc_ecb[8]; /* one per target */
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struct esp_tinfo sc_tinfo[8];
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/* Data about the current nexus (updated for every cmd switch) */
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caddr_t sc_dp; /* Current data pointer */
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size_t sc_dleft; /* Data left to transfer */
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/* Adapter state */
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int sc_phase; /* Copy of what bus phase we are in */
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int sc_prevphase; /* Copy of what bus phase we were in */
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u_char sc_state; /* State applicable to the adapter */
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u_char sc_flags;
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u_char sc_selid;
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/* Message stuff */
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char sc_msgpriq; /* One or more messages to send (encoded) */
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char sc_msgout; /* What message is on its way out? */
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char sc_omess[ESP_MAX_MSG_LEN];
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caddr_t sc_omp; /* Message pointer (for multibyte messages) */
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size_t sc_omlen;
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char sc_imess[ESP_MAX_MSG_LEN + 1];
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caddr_t sc_imp; /* Message pointer (for multibyte messages) */
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size_t sc_imlen;
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/* hardware/openprom stuff */
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int sc_node; /* PROM node ID */
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int sc_freq; /* Freq in HZ */
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int sc_pri; /* SBUS priority */
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int sc_id; /* our scsi id */
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int sc_rev; /* esp revision */
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int sc_minsync; /* minimum sync period / 4 */
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};
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/* values for sc_state */
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#define ESP_IDLE 0x01 /* waiting for something to do */
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#define ESP_TMP_UNAVAIL 0x02 /* Don't accept SCSI commands */
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#define ESP_SELECTING 0x03 /* SCSI command is arbiting */
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#define ESP_RESELECTED 0x04 /* Has been reselected */
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#define ESP_HASNEXUS 0x05 /* Actively using the SCSI bus */
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#define ESP_CLEANING 0x06
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/* values for sc_flags */
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#define ESP_DROP_MSGI 0x01 /* Discard all msgs (parity err detected) */
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#define ESP_DOINGDMA 0x02 /* The FIFO data path is active! */
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#define ESP_BUSFREE_OK 0x04 /* Bus free phase is OK. */
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#define ESP_SYNCHNEGO 0x08 /* Synch negotiation in progress. */
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#define ESP_BLOCKED 0x10 /* Don't schedule new scsi bus operations */
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/* values for sc_msgout */
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#define SEND_DEV_RESET 0x01
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#define SEND_PARITY_ERROR 0x02
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#define SEND_ABORT 0x04
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#define SEND_REJECT 0x08
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#define SEND_INIT_DET_ERR 0x10
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#define SEND_IDENTIFY 0x20
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#define SEND_SDTR 0x40
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/*
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* Generic SCSI messages. For now we reject most of them.
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*/
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/* Messages (1 byte) */ /* I/T M(andatory) or (O)ptional */
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#define MSG_CMDCOMPLETE 0x00 /* M/M */
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#define MSG_EXTENDED 0x01 /* O/O */
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#define MSG_SAVEDATAPOINTER 0x02 /* O/O */
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#define MSG_RESTOREPOINTERS 0x03 /* O/O */
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#define MSG_DISCONNECT 0x04 /* O/O */
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#define MSG_INITIATOR_DET_ERR 0x05 /* M/M */
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#define MSG_ABORT 0x06 /* O/M */
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#define MSG_MESSAGE_REJECT 0x07 /* M/M */
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#define MSG_NOOP 0x08 /* M/M */
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#define MSG_PARITY_ERR 0x09 /* M/M */
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#define MSG_LINK_CMD_COMPLETE 0x0a /* O/O */
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#define MSG_LINK_CMD_COMPLETEF 0x0b /* O/O */
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#define MSG_BUS_DEV_RESET 0x0c /* O/M */
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#define MSG_ABORT_TAG 0x0d /* O/O */
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#define MSG_CLEAR_QUEUE 0x0e /* O/O */
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#define MSG_INIT_RECOVERY 0x0f /* O/O */
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#define MSG_REL_RECOVERY 0x10 /* O/O */
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#define MSG_TERM_IO_PROC 0x11 /* O/O */
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/* Messages (2 byte) */
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#define MSG_SIMPLE_Q_TAG 0x20 /* O/O */
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#define MSG_HEAD_OF_Q_TAG 0x21 /* O/O */
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#define MSG_ORDERED_Q_TAG 0x22 /* O/O */
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#define MSG_IGN_WIDE_RESIDUE 0x23 /* O/O */
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/* Identify message */
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#define ESP_MSG_IDENTIFY(lun) (0x80|(lun & 0x7)) /* XXX 0xc0=selection on */
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#define ESP_MSG_ISIDENT(m) ((m) & 0x80)
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/* Extended messages (opcode) */
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#define MSG_EXT_SDTR 0x01
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/* SCSI Status codes */
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#define ST_GOOD 0x00
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#define ST_CHKCOND 0x02
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#define ST_CONDMET 0x04
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#define ST_BUSY 0x08
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#define ST_INTERMED 0x10
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#define ST_INTERMED_CONDMET 0x14
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#define ST_RESERVATION_CONFLICT 0x18
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#define ST_CMD_TERM 0x22
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#define ST_QUEUE_FULL 0x28
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#define ST_MASK 0x3e /* bit 0,6,7 is reserved */
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/* phase bits */
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#define IOI 0x01
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#define CDI 0x02
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#define MSGI 0x04
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/* Information transfer phases */
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#define DATA_OUT_PHASE (0)
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#define DATA_IN_PHASE (IOI)
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#define COMMAND_PHASE (CDI)
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#define STATUS_PHASE (CDI|IOI)
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#define MESSAGE_OUT_PHASE (MSGI|CDI)
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#define MESSAGE_IN_PHASE (MSGI|CDI|IOI)
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#define PHASE_MASK (MSGI|CDI|IOI)
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/* Some pseudo phases for getphase()*/
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#define BUSFREE_PHASE 0x100 /* Re/Selection no longer valid */
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#define INVALID_PHASE 0x101 /* Re/Selection valid, but no REQ yet */
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#define PSEUDO_PHASE 0x100 /* "pseudo" bit */
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#if ESP_DEBUG > 1
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#define ESPCMD(sc, cmd) printf("cmd:0x%02x ", sc->sc_reg[ESP_CMD] = cmd)
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#else
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#define ESPCMD(sc, cmd) sc->sc_reg[ESP_CMD] = cmd
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#endif
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#define SAME_ESP(sc, bp, ca) \
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((bp->val[0] == ca->ca_slot && bp->val[1] == ca->ca_offset) || \
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(bp->val[0] == -1 && bp->val[1] == sc->sc_dev.dv_unit))
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#define TARGETNAME(ecb) \
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((struct device *)ecb->xs->sc_link->adapter_softc)->dv_xname
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/* DMA macros for ESP */
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#define DMA_ENINTR(r) ((r->enintr)(r))
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#define DMA_ISINTR(r) ((r->isintr)(r))
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#define DMA_RESET(r) ((r->reset)(r))
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#define DMA_START(a, b, c, d) ((a->start)(a, b, c, d))
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#define DMA_INTR(r) ((r->intr)(r))
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#define DMA_DRAIN(sc) if (sc->sc_rev < DMAREV_2) { \
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DMACSR(sc) |= D_DRAIN; \
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DMAWAIT1(sc); \
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}
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