/* $NetBSD: mhavar.h,v 1.13 2026/01/02 23:33:58 nia 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. 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. */ /* * 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. Basically, 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 acb { TAILQ_ENTRY(acb) chain; struct scsipi_xfer *xs; /* SCSI xfer ctrl block from above */ int flags; /* Status */ #define ACB_QNONE 0 #define ACB_QFREE 1 #define ACB_QREADY 2 #define ACB_QNEXUS 3 #define ACB_QBITS 0x07 #define ACB_CHKSENSE 0x08 #define ACB_ABORTED 0x10 #define ACB_RESET 0x80 #define ACB_SETQ(e, q) do (e)->flags = ((e)->flags&~ACB_QBITS)|(q); while(0) struct scsipi_generic cmd; /* SCSI command block */ int clen; char *daddr; /* Saved data pointer */ int dleft; /* Residue */ u_char stat; /* SCSI status byte */ /* struct spc_dma_seg dma[SPC_NSEG];*/ /* Physical addresses+len */ }; /* * 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 spc_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 */ u_char width; /* Width suggestion */ }; struct mha_softc { device_t sc_dev; volatile void *sc_iobase; volatile u_char *sc_pc; volatile u_short *sc_ps; volatile u_char *sc_pcx; struct scsipi_channel sc_channel; struct scsipi_adapter sc_adapter; TAILQ_HEAD(, acb) free_list, ready_list, nexus_list; struct acb *sc_nexus; /* current command */ struct acb sc_acb[8]; /* one per target */ struct spc_tinfo sc_tinfo[8]; /* 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 */ 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; /* Reselection ID */ volatile u_char sc_spcinitialized; /* */ /* Message stuff */ u_char sc_msgpriq; /* Messages we want to send */ u_char sc_msgout; /* What message is on its way out? */ u_char sc_msgoutq; /* Messages sent during last MESSAGE OUT */ u_char sc_lastmsg; /* Message last transmitted */ u_char sc_currmsg; /* Message currently ready to transmit */ #define SPC_MAX_MSG_LEN 8 u_char sc_omess[SPC_MAX_MSG_LEN]; u_char *sc_omp; /* Outgoing message pointer */ u_char sc_imess[SPC_MAX_MSG_LEN]; u_char *sc_imp; /* Incoming message pointer */ size_t sc_imlen; /* Hardware stuff */ int sc_freq; /* Clock frequency in MHz */ int sc_id; /* our scsi id */ int sc_minsync; /* Minimum sync period / 4 */ int sc_maxsync; /* Maximum sync period / 4 */ /* DMA buffer */ bus_dma_tag_t sc_dmat; bus_dma_segment_t sc_dmaseg[1]; int sc_ndmasegs; bus_dmamap_t sc_dmamap; void * sc_dmabuf; u_char *sc_p; u_int32_t sc_dmasize; }; /* values for sc_state */ #define SPC_INIT 0x00 #define SPC_IDLE 0x01 /* waiting for something to do */ #define ESP_TMP_UNAVAIL 0x02 /* Don't accept SCSI commands */ #define SPC_SELECTING 0x03 /* SCSI command is arbiting */ #define SPC_RESELECTED 0x04 /* Has been reselected */ #define SPC_HASNEXUS 0x05 /* Actively using the SCSI bus */ #define SPC_CLEANING 0x06 #define ESP_SBR 0x07 /* Expect a SCSI RST because we commanded it */ #define SPC_CONNECTED 0x08 /* Actively using the SCSI bus */ #define SPC_DISCONNECT 0x09 /* MSG_DISCONNECT received */ #define SPC_CMDCOMPLETE 0x0a /* MSG_CMDCOMPLETE received */ /* values for sc_flags */ #define SPC_DROP_MSGI 0x01 /* Discard all msgs (parity err detected) */ #define SPC_DOINGDMA 0x02 /* The FIFO data path is active! */ #define SPC_BUSFREE_OK 0x04 /* Bus free phase is OK. */ #define SPC_SYNCHNEGO 0x08 /* Synch negotiation in progress. */ #define SPC_DISCON 0x10 /* Target sent DISCONNECT msg */ #define SPC_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_INIT_DET_ERR 0x04 #define SEND_REJECT 0x08 #define SEND_IDENTIFY 0x10 #define SEND_ABORT 0x20 #define SEND_SDTR 0x40 #define SEND_WDTR 0x80 /* 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 */
