/* * Copyright (c) 1994 Charles Hannum. * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Jarle Greipsland * 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. */ /* * $Id: aic6360.c,v 1.2 1994/10/19 01:58:53 wollman Exp $ * * 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! * * Converted from NetBSD to FreeBSD by Jim Babb */ /* TODO list: * 1) Get the DMA stuff working. * 2) Get the iov/uio stuff working. Is this a good thing ??? * 3) Get the synch stuff working. * 4) Rewrite it to use malloc for the acb structs instead of static alloc.? */ /* * A few customizable items: */ /* The SCSI ID of the host adapter/computer */ #define AIC_SCSI_HOSTID 7 /* Use doubleword transfers to/from SCSI chip. Note: This requires * motherboard support. Basicly, some motherboard chipsets are able to * split a 32 bit I/O operation into two 16 bit I/O operations, * transparently to the processor. This speeds up some things, notably long * data transfers. */ #define AIC_USE_DWORDS 0 /* Allow disconnects? Was mainly used in an early phase of the driver when * the message system was very flaky. Should go away soon. */ #define AIC_ALLOW_DISCONNECT 1 /* Synchronous data transfers? (does not work yet!) XXX */ #define AIC_USE_SYNCHRONOUS 0 /* Enable/disable (1/0) */ #define AIC_SYNC_PERIOD 200 #define AIC_SYNC_REQ_ACK_OFS 8 /* Max attempts made to transmit a message */ #define AIC_MSG_MAX_ATTEMPT 3 /* Not used now XXX */ /* Use DMA (else we do programmed I/O using string instructions) (not yet!)*/ #define AIC_USE_EISA_DMA 0 #define AIC_USE_ISA_DMA 0 /* How to behave on the (E)ISA bus when/if DMAing (on<<4) + off in us */ #define EISA_BRST_TIM ((15<<4) + 1) /* 15us on, 1us off */ /* Some spin loop parameters (essentially how long to wait some places) * The problem(?) is that sometimes we expect either to be able to transmit a * byte or to get a new one from the SCSI bus pretty soon. In order to avoid * returning from the interrupt just to get yanked back for the next byte we * may spin in the interrupt routine waiting for this byte to come. How long? * This is really (SCSI) device and processor dependent. Tuneable, I guess. */ #define AIC_MSGI_SPIN 1 /* Will spinwait upto ?ms for a new msg byte */ #define AIC_MSGO_SPIN 1 /* Include debug functions? At the end of this file there are a bunch of * functions that will print out various information regarding queued SCSI * commands, driver state and chip contents. You can call them from the * kernel debugger. If you set AIC_DEBUG to 0 they are not included (the * kernel uses less memory) but you lose the debugging facilities. */ #define AIC_DEBUG 0 /* End of customizable parameters */ #if AIC_USE_EISA_DMA || AIC_USE_ISA_DMA #error "I said not yet! Start paying attention... grumble" #endif #ifdef __FreeBSD__ #include #endif #include #include #ifdef __FreeBSD__ #include #endif #include #include #include #ifdef __FreeBSD__ #include #else #include #endif #include #include #include #include #ifndef __FreeBSD__ #include #endif #include #include #ifdef __FreeBSD__ #include #include #include "ddb.h" #include #else #include #include #endif /* Definitions, most of them has turned out to be unneccesary, but here they * are anyway. */ /* * Generic SCSI messages. For now we reject most of them. */ /* Messages (1 byte) */ /* I/T M(andatory) or (O)ptional */ #define MSG_CMDCOMPLETE 0x00 /* M/M */ #define MSG_EXTENDED 0x01 /* O/O */ #define MSG_SAVEDATAPOINTER 0x02 /* O/O */ #define MSG_RESTOREPOINTERS 0x03 /* O/O */ #define MSG_DISCONNECT 0x04 /* O/O */ #define MSG_INITIATOR_DET_ERR 0x05 /* M/M */ #define MSG_ABORT 0x06 /* O/M */ #define MSG_MESSAGE_REJECT 0x07 /* M/M */ #define MSG_NOOP 0x08 /* M/M */ #define MSG_PARITY_ERR 0x09 /* M/M */ #define MSG_LINK_CMD_COMPLETE 0x0a /* O/O */ #define MSG_LINK_CMD_COMPLETEF 0x0b /* O/O */ #define MSG_BUS_DEV_RESET 0x0c /* O/M */ #define MSG_ABORT_TAG 0x0d /* O/O */ #define MSG_CLEAR_QUEUE 0x0e /* O/O */ #define MSG_INIT_RECOVERY 0x0f /* O/O */ #define MSG_REL_RECOVERY 0x10 /* O/O */ #define MSG_TERM_IO_PROC 0x11 /* O/O */ /* Messages (2 byte) */ #define MSG_SIMPLE_Q_TAG 0x20 /* O/O */ #define MSG_HEAD_OF_Q_TAG 0x21 /* O/O */ #define MSG_ORDERED_Q_TAG 0x22 /* O/O */ #define MSG_IGN_WIDE_RESIDUE 0x23 /* O/O */ /* Identify message */ #define MSG_IDENTIFY(lun) ((AIC_ALLOW_DISCONNECT ? 0xc0 : 0x80)|((lun) & 0x7)) #define MSG_ISIDENT(m) ((m) & 0x80) /* Extended messages (opcode) */ #define MSG_EXT_SDTR 0x01 /* 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 */ /* AIC6360 definitions */ #define SCSISEQ (iobase + 0x00) /* SCSI sequence control */ #define SXFRCTL0 (iobase + 0x01) /* SCSI transfer control 0 */ #define SXFRCTL1 (iobase + 0x02) /* SCSI transfer control 1 */ #define SCSISIGI (iobase + 0x03) /* SCSI signal in */ #define SCSISIGO (iobase + 0x03) /* SCSI signal out */ #define SCSIRATE (iobase + 0x04) /* SCSI rate control */ #define SCSIID (iobase + 0x05) /* SCSI ID */ #define SELID (iobase + 0x05) /* Selection/Reselection ID */ #define SCSIDAT (iobase + 0x06) /* SCSI Latched Data */ #define SCSIBUS (iobase + 0x07) /* SCSI Data Bus*/ #define STCNT0 (iobase + 0x08) /* SCSI transfer count */ #define STCNT1 (iobase + 0x09) #define STCNT2 (iobase + 0x0a) #define CLRSINT0 (iobase + 0x0b) /* Clear SCSI interrupts 0 */ #define SSTAT0 (iobase + 0x0b) /* SCSI interrupt status 0 */ #define CLRSINT1 (iobase + 0x0c) /* Clear SCSI interrupts 1 */ #define SSTAT1 (iobase + 0x0c) /* SCSI status 1 */ #define SSTAT2 (iobase + 0x0d) /* SCSI status 2 */ #define SCSITEST (iobase + 0x0e) /* SCSI test control */ #define SSTAT3 (iobase + 0x0e) /* SCSI status 3 */ #define CLRSERR (iobase + 0x0f) /* Clear SCSI errors */ #define SSTAT4 (iobase + 0x0f) /* SCSI status 4 */ #define SIMODE0 (iobase + 0x10) /* SCSI interrupt mode 0 */ #define SIMODE1 (iobase + 0x11) /* SCSI interrupt mode 1 */ #define DMACNTRL0 (iobase + 0x12) /* DMA control 0 */ #define DMACNTRL1 (iobase + 0x13) /* DMA control 1 */ #define DMASTAT (iobase + 0x14) /* DMA status */ #define FIFOSTAT (iobase + 0x15) /* FIFO status */ #define DMADATA (iobase + 0x16) /* DMA data */ #define DMADATAL (iobase + 0x16) /* DMA data low byte */ #define DMADATAH (iobase + 0x17) /* DMA data high byte */ #define BRSTCNTRL (iobase + 0x18) /* Burst Control */ #define DMADATALONG (iobase + 0x18) #define PORTA (iobase + 0x1a) /* Port A */ #define PORTB (iobase + 0x1b) /* Port B */ #define REV (iobase + 0x1c) /* Revision (001 for 6360) */ #define STACK (iobase + 0x1d) /* Stack */ #define TEST (iobase + 0x1e) /* Test register */ #define ID (iobase + 0x1f) /* ID register */ #define IDSTRING "(C)1991ADAPTECAIC6360 " /* What all the bits do */ /* SCSISEQ */ #define TEMODEO 0x80 #define ENSELO 0x40 #define ENSELI 0x20 #define ENRESELI 0x10 #define ENAUTOATNO 0x08 #define ENAUTOATNI 0x04 #define ENAUTOATNP 0x02 #define SCSIRSTO 0x01 /* SXFRCTL0 */ #define SCSIEN 0x80 #define DMAEN 0x40 #define CHEN 0x20 #define CLRSTCNT 0x10 #define SPIOEN 0x08 #define CLRCH 0x02 /* SXFRCTL1 */ #define BITBUCKET 0x80 #define SWRAPEN 0x40 #define ENSPCHK 0x20 #define STIMESEL1 0x10 #define STIMESEL0 0x08 #define STIMO_256ms 0x00 #define STIMO_128ms 0x08 #define STIMO_64ms 0x10 #define STIMO_32ms 0x18 #define ENSTIMER 0x04 #define BYTEALIGN 0x02 /* SCSISIGI */ #define CDI 0x80 #define IOI 0x40 #define MSGI 0x20 #define ATNI 0x10 #define SELI 0x08 #define BSYI 0x04 #define REQI 0x02 #define ACKI 0x01 /* Important! The 3 most significant bits of this register, in initiator mode, * represents the "expected" SCSI bus phase and can be used to trigger phase * mismatch and phase change interrupts. But more important: If there is a * phase mismatch the chip will not transfer any data! This is actually a nice * feature as it gives us a bit more control over what is happening when we are * bursting data (in) through the FIFOs and the phase suddenly changes from * DATA IN to STATUS or MESSAGE IN. The transfer will stop and wait for the * proper phase to be set in this register instead of dumping the bits into the * FIFOs. */ /* SCSISIGO */ #define CDO 0x80 #define CDEXP (CDO) #define IOO 0x40 #define IOEXP (IOO) #define MSGO 0x20 #define MSGEXP (MSGO) #define ATNO 0x10 #define SELO 0x08 #define BSYO 0x04 #define REQO 0x02 #define ACKO 0x01 /* Information transfer phases */ #define PH_DOUT (0) #define PH_DIN (IOI) #define PH_CMD (CDI) #define PH_STAT (CDI|IOI) #define PH_MSGO (MSGI|CDI) #define PH_MSGI (MSGI|CDI|IOI) #define PH_MASK 0xe0 /* Some pseudo phases for getphase()*/ #define PH_BUSFREE 0x100 /* (Re)Selection no longer valid */ #define PH_INVALID 0x101 /* (Re)Selection valid, but no REQ yet */ #define PH_PSBIT 0x100 /* "pseudo" bit */ /* SCSIRATE */ #define SXFR2 0x40 #define SXFR1 0x20 #define SXFR0 0x10 #define SOFS3 0x08 #define SOFS2 0x04 #define SOFS1 0x02 #define SOFS0 0x01 /* SCSI ID */ #define OID2 0x40 #define OID1 0x20 #define OID0 0x10 #define OID_S 4 /* shift value */ #define TID2 0x04 #define TID1 0x02 #define TID0 0x01 #define SCSI_ID_MASK 0x7 /* SCSI selection/reselection ID (both target *and* initiator) */ #define SELID7 0x80 #define SELID6 0x40 #define SELID5 0x20 #define SELID4 0x10 #define SELID3 0x08 #define SELID2 0x04 #define SELID1 0x02 #define SELID0 0x01 /* CLRSINT0 Clears what? (interrupt and/or status bit) */ #define SETSDONE 0x80 #define CLRSELDO 0x40 /* I */ #define CLRSELDI 0x20 /* I+ */ #define CLRSELINGO 0x10 /* I */ #define CLRSWRAP 0x08 /* I+S */ #define CLRSDONE 0x04 /* I+S */ #define CLRSPIORDY 0x02 /* I */ #define CLRDMADONE 0x01 /* I */ /* SSTAT0 Howto clear */ #define TARGET 0x80 #define SELDO 0x40 /* Selfclearing */ #define SELDI 0x20 /* Selfclearing when CLRSELDI is set */ #define SELINGO 0x10 /* Selfclearing */ #define SWRAP 0x08 /* CLRSWAP */ #define SDONE 0x04 /* Not used in initiator mode */ #define SPIORDY 0x02 /* Selfclearing (op on SCSIDAT) */ #define DMADONE 0x01 /* Selfclearing (all FIFOs empty & T/C */ /* CLRSINT1 Clears what? */ #define CLRSELTIMO 0x80 /* I+S */ #define CLRATNO 0x40 #define CLRSCSIRSTI 0x20 /* I+S */ #define CLRBUSFREE 0x08 /* I+S */ #define CLRSCSIPERR 0x04 /* I+S */ #define CLRPHASECHG 0x02 /* I+S */ #define CLRREQINIT 0x01 /* I+S */ /* SSTAT1 How to clear? When set?*/ #define SELTO 0x80 /* C select out timeout */ #define ATNTARG 0x40 /* Not used in initiator mode */ #define SCSIRSTI 0x20 /* C RST asserted */ #define PHASEMIS 0x10 /* Selfclearing */ #define BUSFREE 0x08 /* C bus free condition */ #define SCSIPERR 0x04 /* C parity error on inbound data */ #define PHASECHG 0x02 /* C phase in SCSISIGI doesn't match */ #define REQINIT 0x01 /* C or ACK asserting edge of REQ */ /* SSTAT2 */ #define SOFFSET 0x20 #define SEMPTY 0x10 #define SFULL 0x08 #define SFCNT2 0x04 #define SFCNT1 0x02 #define SFCNT0 0x01 /* SCSITEST */ #define SCTESTU 0x08 #define SCTESTD 0x04 #define STCTEST 0x01 /* SSTAT3 */ #define SCSICNT3 0x80 #define SCSICNT2 0x40 #define SCSICNT1 0x20 #define SCSICNT0 0x10 #define OFFCNT3 0x08 #define OFFCNT2 0x04 #define OFFCNT1 0x02 #define OFFCNT0 0x01 /* CLRSERR */ #define CLRSYNCERR 0x04 #define CLRFWERR 0x02 #define CLRFRERR 0x01 /* SSTAT4 */ #define SYNCERR 0x04 #define FWERR 0x02 #define FRERR 0x01 /* SIMODE0 */ #define ENSELDO 0x40 #define ENSELDI 0x20 #define ENSELINGO 0x10 #define ENSWRAP 0x08 #define ENSDONE 0x04 #define ENSPIORDY 0x02 #define ENDMADONE 0x01 /* SIMODE1 */ #define ENSELTIMO 0x80 #define ENATNTARG 0x40 #define ENSCSIRST 0x20 #define ENPHASEMIS 0x10 #define ENBUSFREE 0x08 #define ENSCSIPERR 0x04 #define ENPHASECHG 0x02 #define ENREQINIT 0x01 /* DMACNTRL0 */ #define ENDMA 0x80 #define B8MODE 0x40 #define DMA 0x20 #define DWORDPIO 0x10 #define WRITE 0x08 #define INTEN 0x04 #define RSTFIFO 0x02 #define SWINT 0x01 /* DMACNTRL1 */ #define PWRDWN 0x80 #define ENSTK32 0x40 #define STK4 0x10 #define STK3 0x08 #define STK2 0x04 #define STK1 0x02 #define STK0 0x01 /* DMASTAT */ #define ATDONE 0x80 #define WORDRDY 0x40 #define INTSTAT 0x20 #define DFIFOFULL 0x10 #define DFIFOEMP 0x08 #define DFIFOHF 0x04 #define DWORDRDY 0x02 /* BRSTCNTRL */ #define BON3 0x80 #define BON2 0x40 #define BON1 0x20 #define BON0 0x10 #define BOFF3 0x08 #define BOFF2 0x04 #define BOFF1 0x02 #define BOFF0 0x01 /* TEST */ #define BOFFTMR 0x40 #define BONTMR 0x20 #define STCNTH 0x10 #define STCNTM 0x08 #define STCNTL 0x04 #define SCSIBLK 0x02 #define DMABLK 0x01 #define orreg(reg, val) outb((reg), inb(reg)| (val)) #define andreg(reg, val) outb((reg), inb(reg)& (val)) #define nandreg(reg, val) outb((reg), inb(reg)&~(val)) /* Grabbed from Julians SCSI aha-drivers */ #ifdef DDB int Debugger(); #else DDB #define Debugger() panic("should call debugger here (aic6360.c)") #endif DDB typedef u_long physaddr; struct aic_dma_seg { physaddr addr; long len; }; #ifdef __FreeBSD__ #define DELAYCOUNT 16 #else extern int delaycount; #endif #define FUDGE(X) ((X)>>1) /* get 1 ms spincount */ #define MINIFUDGE(X) ((X)>>4) /* get (approx) 125us spincount */ #define AIC_NSEG 16 #define NUM_CONCURRENT 7 /* Only one per target for now */ /* * 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 acb { TAILQ_ENTRY(acb) chain; struct scsi_xfer *xs; /* SCSI xfer ctrl block from above */ int flags; /* Status */ #define ACB_FREE 0x00 #define ACB_ACTIVE 0x01 #define ACB_DONE 0x04 #define ACB_CHKSENSE 0x08 /* struct aic_dma_seg dma[AIC_NSEG]; */ /* Physical addresses+len */ struct scsi_generic cmd; /* SCSI command block */ int clen; char *daddr; /* Saved data pointer */ int dleft; /* Residue */ int stat; /* SCSI status byte */ }; /* * 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 aic_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 NEED_TO_RESET 0x01 /* Should send a BUS_DEV_RESET */ #define DO_NEGOTIATE 0x02 /* (Re)Negotiate synchronous options */ #define TARGET_BUSY 0x04 /* Target is busy, i.e. cmd in progress */ u_char persgst; /* Period suggestion */ u_char offsgst; /* Offset suggestion */ u_char syncdata; /* True negotiated synch parameters */ } tinfo_t; /* Register a linenumber (for debugging) */ #if AIC_DEBUG #define LOGLINE(p) \ do { \ p->history[p->hp] = __LINE__; \ p->hp = ++p->hp % AIC_HSIZE; \ } while (0) #else #define LOGLINE(p) #endif #ifdef __FreeBSD__ struct aic_data { /* One of these per adapter */ #else struct aic_softc { /* One of these per adapter */ /* Auto config stuff */ struct device sc_dev; /* This one has to go first! */ struct isadev sc_id; struct intrhand sc_ih; struct scsi_link sc_link; /* prototype for subdevs */ int id_irq; /* IRQ on the EISA bus */ int id_drq; /* DRQ on the EISA bus */ #endif u_short iobase; /* Base I/O port */ #ifdef __FreeBSD__ struct scsi_link sc_link; /* prototype for subdevs */ int aic_int; /* IRQ on the EISA bus */ int aic_dma; /* DRQ on the EISA bus */ #endif /* Lists of command blocks */ TAILQ_HEAD(acb_list, acb) free_list, ready_list, nexus_list; struct acb *nexus; /* current command */ /* Command blocks and target info */ struct acb acb[NUM_CONCURRENT]; struct aic_tinfo tinfo[8]; /* Data about the current nexus (updated for every cmd switch) */ u_char *dp; /* Current data pointer */ int dleft; /* Data left to transfer */ /* Adapter state */ short phase; /* Copy of what bus phase we are in */ short prevphase; /* Copy of what bus phase we were in */ short state; /* State applicable to the adapter */ #define AIC_IDLE 0x01 #define AIC_TMP_UNAVAIL 0x02 /* Don't accept SCSI commands */ #define AIC_SELECTING 0x03 /* SCSI command is arbiting */ #define AIC_RESELECTED 0x04 /* Has been reselected */ #define AIC_HASNEXUS 0x05 /* Actively using the SCSI bus */ #define AIC_CLEANING 0x06 short flags; #define AIC_DROP_MSGI 0x01 /* Discard all msgs (parity err detected) */ #define AIC_DOINGDMA 0x02 /* The FIFO data path is active! */ #define AIC_BUSFREE_OK 0x04 /* Bus free phase is OK. */ #define AIC_SYNCHNEGO 0x08 /* Synch negotiation in progress. */ #define AIC_BLOCKED 0x10 /* Don't schedule new scsi bus operations */ /* Debugging stuff */ #define AIC_HSIZE 8 short history[AIC_HSIZE]; /* Store line numbers here. */ short hp; u_char progress; /* Set if interrupt has achieved progress */ /* Message stuff */ u_char msgpriq; /* One or more messages to send (encoded) */ u_char msgout; /* What message is on its way out? */ #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 #define AIC_MAX_MSG_LEN 8 u_char omess[AIC_MAX_MSG_LEN]; /* Scratch area for messages */ u_char *omp; /* Message pointer (for multibyte messages) */ u_char omlen; u_char imess[AIC_MAX_MSG_LEN + 1]; u_char *imp; /* Message pointer (for multibyte messages) */ u_char imlen; #ifdef __FreeBSD__ } *aicdata[NAIC]; #else }; #endif #define AIC_SHOWACBS 0x01 #define AIC_SHOWINTS 0x02 #define AIC_SHOWCMDS 0x04 #define AIC_SHOWMISC 0x08 #define AIC_SHOWTRAC 0x10 #define AIC_SHOWSTART 0x20 int aic_debug = 0; /* AIC_SHOWSTART|AIC_SHOWMISC|AIC_SHOWTRAC; */ #if AIC_DEBUG #define AIC_ACBS(str) do {if (aic_debug & AIC_SHOWACBS) printf str;} while (0) #define AIC_MISC(str) do {if (aic_debug & AIC_SHOWMISC) printf str;} while (0) #define AIC_INTS(str) do {if (aic_debug & AIC_SHOWINTS) printf str;} while (0) #define AIC_TRACE(str) do {if (aic_debug & AIC_SHOWTRAC) printf str;} while (0) #define AIC_CMDS(str) do {if (aic_debug & AIC_SHOWCMDS) printf str;} while (0) #define AIC_START(str) do {if (aic_debug & AIC_SHOWSTART) printf str;}while (0) #else #define AIC_ACBS(str) #define AIC_MISC(str) #define AIC_INTS(str) #define AIC_TRACE(str) #define AIC_CMDS(str) #define AIC_START(str) #endif #ifdef __FreeBSD__ int aicprobe __P((struct isa_device *)); int aicattach __P((struct isa_device *)); #else int aicprobe __P((struct device *, struct device *, void *)); void aicattach __P((struct device *, struct device *, void *)); #endif void aic_minphys __P((struct buf *)); #ifdef __FreeBSD__ u_int32 aic_adapter_info __P((int)); int aicintr __P((int)); void aic_init __P((struct aic_data *)); int aic_find __P((struct aic_data *)); #else u_int aic_adapter_info __P((struct aic_softc *)); int aicintr __P((struct aic_softc *)); void aic_init __P((struct aic_softc *)); #endif void aic_done __P((struct acb *)); #ifdef __FreeBSD__ int32 aic_scsi_cmd __P((struct scsi_xfer *)); int aic_poll __P((int, struct acb *)); #else int aic_scsi_cmd __P((struct scsi_xfer *)); int aic_poll __P((struct aic_softc *, struct acb *)); #endif void aic_add_timeout __P((struct acb *, int)); void aic_remove_timeout __P((struct acb *)); #ifdef __FreeBSD__ timeout_t aic_timeout; void aic_sched __P((struct aic_data *)); void aic_scsi_reset __P((struct aic_data *)); #else void aic_timeout __P((void *arg)); int aic_find __P((struct aic_softc *)); void aic_sched __P((struct aic_softc *)); void aic_scsi_reset __P((struct aic_softc *)); #endif #if AIC_DEBUG void aic_print_active_acb(); void aic_dump_driver(); void aic_dump6360(); #endif /* Linkup to the rest of the kernel */ #ifdef __FreeBSD__ struct isa_driver aicdriver = { aicprobe, aicattach, "aic" }; static int aicunit = 0; #else struct cfdriver aiccd = { NULL, "aic", aicprobe, aicattach, DV_DULL, sizeof(struct aic_softc) #endif struct scsi_adapter aic_switch = { aic_scsi_cmd, aic_minphys, 0, 0, aic_adapter_info, "aic" #ifdef __FreeBSD__ ,0 , 0 #endif }; struct scsi_device aic_dev = { NULL, /* Use default error handler */ NULL, /* have a queue, served by this */ NULL, /* have no async handler */ NULL, /* Use default 'done' routine */ "aic", 0 }; static struct kern_devconf kdc_aic[NAIC] = { { 0, 0, 0, /* filled in by dev_attach */ "aic", 0, { MDDT_ISA, 0, "bio" }, isa_generic_externalize, 0, 0, ISA_EXTERNALLEN, &kdc_isa0, /* parent */ 0, /* parentdata */ DC_BUSY, /* host adapters are always busy */ "Adaptec AIC-6360 SCSI host adapter chipset" } }; static inline void aic_registerdev(struct isa_device *id) { if(id->id_unit) kdc_aic[id->id_unit] = kdc_aic[0]; kdc_aic[id->id_unit].kdc_unit = id->id_unit; kdc_aic[id->id_unit].kdc_parentdata = id; dev_attach(&kdc_aic[id->id_unit]); } /* * INITIALIZATION ROUTINES (probe, attach ++) */ /* * aicprobe: probe for AIC6360 SCSI-controller * returns non-zero value if a controller is found. */ int #ifdef __FreeBSD__ aicprobe(dev) struct isa_device *dev; #else aicprobe(parent, self, aux) struct device *parent, *self; void *aux; #endif { #ifdef __FreeBSD__ int unit = aicunit; struct aic_data *aic; #else struct aic_softc *aic = (void *)self; struct isa_attach_args *ia = aux; #endif int i, len, ic; #ifdef __FreeBSD__ if (unit >= NAIC) { printf("aic%d: unit number too high\n", unit); return 0; } dev->id_unit = unit; /* * Allocate a storage area for us */ if (aicdata[unit]) { printf("aic%d: memory already allocated\n", unit); return 0; } aic = malloc(sizeof(struct aic_data), M_TEMP, M_NOWAIT); if (!aic) { printf("aic%d: cannot malloc!\n", unit); return 0; } bzero(aic, sizeof(struct aic_data)); aicdata[unit] = aic; aic->iobase = dev->id_iobase; if (aic_find(aic) != 0) { aicdata[unit] = NULL; free(aic, M_TEMP); return 0; } aicunit++; aic_registerdev(dev); return 0x20; #else #ifdef NEWCONFIG if (ia->ia_iobase == IOBASEUNK) return 0; #endif aic->iobase = ia->ia_iobase; if (aic_find(aic) != 0) return 0; #ifdef NEWCONFIG if (ia->ia_irq == IRQUNK) ia->ia_irq = (1 << aic->aic_int); else if (ia->ia_irq != (1 << aic->aic_int)) { printf("aic%d: irq mismatch, %x != %x\n", aic->sc_dev.dv_unit, ia->ia_irq, 1 << aic->aic_int); return 0; } if (ia->ia_drq == DRQUNK) ia->ia_drq = aic->aic_dma; else if (ia->ia_drq != aic->aic_dma) { printf("aic%d: drq mismatch, %x != %x\n", aic->sc_dev.dv_unit, ia->ia_drq, aic->aic_dma); return 0; #endif } ia->ia_msize = 0; ia->ia_iosize = 0x20; return 1; } #endif } /* Do the real search-for-device. * Prerequisite: aic->iobase should be set to the proper value */ int aic_find(aic) #ifdef __FreeBSD__ struct aic_data *aic; #else struct aic_softc *aic; #endif { u_short iobase = aic->iobase; char chip_id[sizeof(IDSTRING)]; /* For chips that support it */ char *start; int i; /* Remove aic6360 from possible powerdown mode */ outb(DMACNTRL0, 0); /* Thanks to mark@aggregate.com for the new method for detecting * whether the chip is present or not. Bonus: may also work for * the AIC-6260! */ AIC_TRACE(("aic: probing for aic-chip at port 0x%x\n",(int)iobase)); /* * Linux also init's the stack to 1-16 and then clears it, * 6260's don't appear to have an ID reg - mpg */ /* Push the sequence 0,1,..,15 on the stack */ #define STSIZE 16 outb(DMACNTRL1, 0); /* Reset stack pointer */ for (i = 0; i < STSIZE; i++) outb(STACK, i); /* See if we can pull out the same sequence */ outb(DMACNTRL1, 0); for (i = 0; i < STSIZE && inb(STACK) == i; i++) ; if (i != STSIZE) { AIC_START(("STACK futzed at %d.\n", i)); return ENXIO; } /* See if we can pull the id string out of the ID register, * now only used for informational purposes. */ bzero(chip_id, sizeof(chip_id)); insb(ID, chip_id, sizeof(IDSTRING)-1); AIC_START(("AIC found at 0x%x ", (int)aic->iobase)); AIC_START(("ID: %s ",chip_id)); AIC_START(("chip revision %d\n",(int)inb(REV))); return 0; } #ifndef __FreeBSD__ int aicprint() { } #endif /* * Attach the AIC6360, fill out some high and low level data structures */ #ifdef __FreeBSD__ int aicattach(dev) struct isa_device *dev; #else void aicattach(parent, self, aux) struct device *parent, *self; void *aux; #endif { #ifdef __FreeBSD__ int unit = dev->id_unit; struct aic_data *aic = aicdata[unit]; #else struct isa_attach_args *ia = aux; struct aic_softc *aic = (void *)self; #endif AIC_TRACE(("aicattach\n")); aic->state = 0; aic_scsi_reset(aic); aic_init(aic); /* Init chip and driver */ /* * Fill in the prototype scsi_link */ #ifdef __FreeBSD__ aic->sc_link.adapter_unit = unit; #else aic->sc_link.adapter_softc = aic; #endif aic->sc_link.adapter_targ = AIC_SCSI_HOSTID; aic->sc_link.adapter = &aic_switch; aic->sc_link.device = &aic_dev; #ifdef __FreeBSD__ /* * ask the adapter what subunits are present */ scsi_attachdevs(&(aic->sc_link)); return 1; #else printf("\n"); #ifdef NEWCONFIG isa_establish(&aic->sc_id, &aic->sc_dev); #endif aic->sc_ih.ih_fun = aicintr; aic->sc_ih.ih_arg = aic; aic->sc_ih.ih_level = IPL_BIO; intr_establish(ia->ia_irq, &aic->sc_ih); config_found(self, &aic->sc_link, aicprint); #endif } /* Initialize AIC6360 chip itself * The following conditions should hold: * aicprobe should have succeeded, i.e. the iobase address in aic_data must * be valid. */ static void aic6360_reset(aic) #ifdef __FreeBSD__ struct aic_data *aic; #else struct aic_softc *aic; #endif { u_short iobase = aic->iobase; outb(SCSITEST, 0); /* Doc. recommends to clear these two */ outb(TEST, 0); /* registers before operations commence */ /* Reset SCSI-FIFO and abort any transfers */ outb(SXFRCTL0, CHEN|CLRCH|CLRSTCNT); /* Reset DMA-FIFO */ outb(DMACNTRL0, RSTFIFO); outb(DMACNTRL1, 0); outb(SCSISEQ, 0); /* Disable all selection features */ outb(SXFRCTL1, 0); outb(SIMODE0, 0x00); /* Disable some interrupts */ outb(CLRSINT0, 0x7f); /* Clear a slew of interrupts */ outb(SIMODE1, 0x00); /* Disable some more interrupts */ outb(CLRSINT1, 0xef); /* Clear another slew of interrupts */ outb(SCSIRATE, 0); /* Disable synchronous transfers */ outb(CLRSERR, 0x07); /* Haven't seen ant errors (yet) */ outb(SCSIID, AIC_SCSI_HOSTID << OID_S); /* Set our SCSI-ID */ outb(BRSTCNTRL, EISA_BRST_TIM); } /* Pull the SCSI RST line for 500 us */ void aic_scsi_reset(aic) #ifdef __FreeBSD__ struct aic_data *aic; #else struct aic_softc *aic; #endif { u_short iobase = aic->iobase; outb(SCSISEQ, SCSIRSTO); #ifdef __FreeBSD__ DELAY(500); #else delay(500); #endif outb(SCSISEQ, 0); #ifdef __FreeBSD__ DELAY(50); #else delay(50); #endif } /* * Initialize aic SCSI driver, also (conditonally) reset the SCSI bus. * The reinitialization is still buggy (e.g. on SCSI resets). */ void aic_init(aic) #ifdef __FreeBSD__ struct aic_data *aic; #else struct aic_softc *aic; #endif { u_short iobase = aic->iobase; struct acb *acb; int r; /* Reset the SCSI-bus itself */ aic_scsi_reset(aic); aic6360_reset(aic); /* Clean up our own hardware */ /*XXX*/ /* If not the first time (probably a reset condition), * we should clean queues with active commands */ if (aic->state == 0) { /* First time through */ TAILQ_INIT(&aic->ready_list); TAILQ_INIT(&aic->nexus_list); TAILQ_INIT(&aic->free_list); aic->nexus = 0; acb = aic->acb; bzero(acb, sizeof(aic->acb)); for (r = 0; r < sizeof(aic->acb) / sizeof(*acb); r++) { TAILQ_INSERT_TAIL(&aic->free_list, acb, chain); acb++; } bzero(&aic->tinfo, sizeof(aic->tinfo)); } else { aic->state = AIC_CLEANING; if (aic->nexus != NULL) { aic->nexus->xs->error = XS_DRIVER_STUFFUP; untimeout(aic_timeout, (caddr_t)aic->nexus); aic_done(aic->nexus); } aic->nexus = NULL; while (acb = aic->nexus_list.tqh_first) { acb->xs->error = XS_DRIVER_STUFFUP; untimeout(aic_timeout, (caddr_t)acb); aic_done(acb); } } aic->phase = aic->prevphase = PH_INVALID; aic->hp = 0; for (r = 0; r < 7; r++) { struct aic_tinfo *tp = &aic->tinfo[r]; tp->flags = AIC_USE_SYNCHRONOUS ? DO_NEGOTIATE : 0; tp->flags |= NEED_TO_RESET; tp->persgst = AIC_SYNC_PERIOD; tp->offsgst = AIC_SYNC_REQ_ACK_OFS; tp->syncdata = 0; } aic->state = AIC_IDLE; outb(DMACNTRL0, INTEN); return; } /* * DRIVER FUNCTIONS CALLABLE FROM HIGHER LEVEL DRIVERS */ /* * Expected sequence: * 1) Command inserted into ready list * 2) Command selected for execution * 3) Command won arbitration and has selected target device * 4) Send message out (identify message, eventually also sync.negotiations) * 5) Send command * 5a) Receive disconnect message, disconnect. * 5b) Reselected by target * 5c) Receive identify message from target. * 6) Send or receive data * 7) Receive status * 8) Receive message (command complete etc.) * 9) If status == SCSI_CHECK construct a synthetic request sense SCSI cmd. * Repeat 2-8 (no disconnects please...) */ /* * Start a SCSI-command * This function is called by the higher level SCSI-driver to queue/run * SCSI-commands. */ #ifdef __FreeBSD__ int32 #else int #endif aic_scsi_cmd(xs) struct scsi_xfer *xs; { struct scsi_link *sc = xs->sc_link; #ifdef __FreeBSD__ int unit = sc->adapter_unit; struct aic_data *aic = aicdata[unit]; #else struct aic_softc *aic = sc->adapter_softc; #endif struct acb *acb; int s = 0; int flags; u_short iobase = aic->iobase; SC_DEBUG(sc, SDEV_DB2, ("aic_scsi_cmd\n")); AIC_TRACE(("aic_scsi_cmd\n")); AIC_MISC(("[0x%x, %d]->%d ", (int)xs->cmd->opcode, xs->cmdlen, sc->target)); flags = xs->flags; /* Get a aic command block */ if (!(flags & SCSI_NOMASK)) { /* Critical region */ s = splbio(); acb = aic->free_list.tqh_first; if (acb) { TAILQ_REMOVE(&aic->free_list, acb, chain); } splx(s); } else { acb = aic->free_list.tqh_first; if (acb) { TAILQ_REMOVE(&aic->free_list, acb, chain); } } if (acb == NULL) { xs->error = XS_DRIVER_STUFFUP; AIC_MISC(("TRY_AGAIN_LATER")); return TRY_AGAIN_LATER; } /* Initialize acb */ acb->flags = ACB_ACTIVE; acb->xs = xs; bcopy(xs->cmd, &acb->cmd, xs->cmdlen); acb->clen = xs->cmdlen; acb->daddr = xs->data; acb->dleft = xs->datalen; acb->stat = 0; if (!(flags & SCSI_NOMASK)) s = splbio(); TAILQ_INSERT_TAIL(&aic->ready_list, acb, chain); timeout(aic_timeout, (caddr_t)acb, (xs->timeout*hz)/1000); if (aic->state == AIC_IDLE) aic_sched(aic); if (!(flags & SCSI_NOMASK)) { /* Almost done. Wait outside */ splx(s); AIC_MISC(("SUCCESSFULLY_QUEUED")); return SUCCESSFULLY_QUEUED; } /* Not allowed to use interrupts, use polling instead */ #ifdef __FreeBSD__ return aic_poll(unit, acb); #else return aic_poll(aic, acb); #endif } /* * Adjust transfer size in buffer structure */ void aic_minphys(bp) struct buf *bp; { AIC_TRACE(("aic_minphys\n")); if (bp->b_bcount > (AIC_NSEG << PGSHIFT)) bp->b_bcount = (AIC_NSEG << PGSHIFT); } #ifdef __FreeBSD__ u_int32 aic_adapter_info(unit) int unit; #else u_int aic_adapter_info(aic) struct aic_softc *aic; #endif { AIC_TRACE(("aic_adapter_info\n")); return (2); /* One outstanding command per target */ } /* * Used when interrupt driven I/O isn't allowed, e.g. during boot. */ int #ifdef __FreeBSD__ aic_poll(unit, acb) int unit; #else aic_poll(aic, acb) struct aic_softc *aic; #endif struct acb *acb; { #ifdef __FreeBSD__ struct aic_data *aic = aicdata[unit]; #endif register u_short iobase = aic->iobase; struct scsi_xfer *xs = acb->xs; int count = xs->timeout * 10; AIC_TRACE(("aic_poll\n")); while (count) { if (inb(DMASTAT) & INTSTAT) #ifdef __FreeBSD__ aicintr(unit); #else aicintr(aic); #endif if (xs->flags & ITSDONE) break; #ifdef __FreeBSD__ DELAY(100); #else delay(100); #endif count--; } if (count == 0) { AIC_MISC(("aic_poll: timeout")); aic_timeout((caddr_t)acb); } if (xs->error) return HAD_ERROR; return COMPLETE; } /* LOW LEVEL SCSI UTILITIES */ /* Determine the SCSI bus phase, return either a real SCSI bus phase or some * pseudo phase we use to detect certain exceptions. This one is a bit tricky. * The bits we peek at: * CDI, MSGI and DI is the 3 SCSI signals determining the bus phase. * These should be qualified by REQI high and ACKI low. * Also peek at SSTAT0[SELDO|SELDI] to detect a passing BUSFREE condition. * No longer detect SCSI RESET or PERR here. They are tested for separately * in the interrupt handler. * Note: If an exception occur at some critical time during the phase * determination we'll most likely return something wildly erronous.... */ static inline u_short aicphase(aic) #ifdef __FreeBSD__ struct aic_data *aic; #else struct aic_softc *aic; #endif { register u_short iobase = aic->iobase; register u_char sstat0, sstat1, scsisig; sstat1 = inb(SSTAT1); /* Look for REQINIT (REQ asserted) */ scsisig = inb(SCSISIGI); /* Get the SCSI bus signals */ sstat0 = inb(SSTAT0); /* Get the selection valid status bits */ if (!(inb(SSTAT0) & (SELDO|SELDI))) /* Selection became invalid? */ return PH_BUSFREE; /* Selection is still valid */ if (!(sstat1 & REQINIT)) /* REQ not asserted ? */ return PH_INVALID; /* REQ is asserted, (and ACK is not) */ return scsisig & PH_MASK; } /* Schedule a scsi operation. This has now been pulled out of the interrupt * handler so that we may call it from aic_scsi_cmd and aic_done. This may * save us an unecessary interrupt just to get things going. Should only be * called when state == AIC_IDLE and at bio pl. */ void aic_sched(aic) #ifdef __FreeBSD__ register struct aic_data *aic; #else register struct aic_softc *aic; #endif { struct scsi_xfer *xs; struct scsi_link *sc; struct acb *acb; u_short iobase = aic->iobase; int t, l; u_char simode0, simode1, scsiseq; AIC_TRACE(("aic_sched\n")); simode0 = ENSELDI; simode1 = ENSCSIRST|ENSCSIPERR|ENREQINIT; scsiseq = ENRESELI; /* * Find first acb in rdy queue that is for a target/lunit * combinations that is not busy. */ outb(CLRSINT1, CLRSELTIMO|CLRBUSFREE|CLRSCSIPERR); for (acb = aic->ready_list.tqh_first; acb; acb = acb->chain.tqe_next) { sc = acb->xs->sc_link; t = sc->target; if (!(aic->tinfo[t].lubusy & (1 << sc->lun))) { TAILQ_REMOVE(&aic->ready_list, acb, chain); aic->nexus = acb; aic->state = AIC_SELECTING; /* * Start selection process. Always enable * reselections. Note: we don't have a nexus yet, so * cannot set aic->state = AIC_HASNEXUS. */ simode0 = ENSELDI|ENSELDO; simode1 = ENSCSIRST|ENSCSIPERR| ENREQINIT|ENSELTIMO; scsiseq = ENRESELI|ENSELO|ENAUTOATNO; outb(SCSIID, AIC_SCSI_HOSTID << OID_S | t); outb(SXFRCTL1, STIMO_256ms|ENSTIMER); outb(CLRSINT0, CLRSELDO); break; } #if AIC_DEBUG else AIC_MISC(("%d:%d busy\n", t, sc->lun)); #endif } AIC_MISC(("%sselecting\n",scsiseq&ENSELO?"":"re")); outb(SIMODE0, simode0); outb(SIMODE1, simode1); outb(SCSISEQ, scsiseq); } /* * POST PROCESSING OF SCSI_CMD (usually current) */ void aic_done(acb) struct acb *acb; { struct scsi_xfer *xs = acb->xs; struct scsi_link *sc = xs->sc_link; #ifdef __FreeBSD__ int unit = sc->adapter_unit; struct aic_data *aic = aicdata[unit]; #else struct aic_softc *aic = sc->adapter_softc; #endif u_short iobase = aic->iobase; struct acb *acb2; AIC_TRACE(("aic_done ")); /* * Now, if we've come here with no error code, i.e. we've kept the * initial XS_NOERROR, and the status code signals that we should * check sense, we'll need to set up a request sense cmd block and * push the command back into the ready queue *before* any other * commands for this target/lunit, else we lose the sense info. * We don't support chk sense conditions for the request sense cmd. */ if (xs->error == XS_NOERROR && !(acb->flags & ACB_CHKSENSE)) { if ((acb->stat & ST_MASK)==SCSI_CHECK) { struct scsi_sense *ss = (void *)&acb->cmd; AIC_MISC(("requesting sense ")); /* First, save the return values */ xs->resid = acb->dleft; xs->status = acb->stat; /* Next, setup a request sense command block */ bzero(ss, sizeof(*ss)); ss->op_code = REQUEST_SENSE; ss->byte2 = sc->lun << 5; ss->length = sizeof(struct scsi_sense_data); acb->clen = sizeof(*ss); acb->daddr = (char *)&xs->sense; acb->dleft = sizeof(struct scsi_sense_data); acb->flags = ACB_ACTIVE|ACB_CHKSENSE; TAILQ_INSERT_HEAD(&aic->ready_list, acb, chain); aic->tinfo[sc->target].lubusy &= ~(1<lun); aic->tinfo[sc->target].senses++; if (aic->nexus == acb) { aic->nexus = NULL; aic->state = AIC_IDLE; aic_sched(aic); } return; } } if (xs->flags & SCSI_ERR_OK) { xs->resid = 0; xs->error = XS_NOERROR; } else if (xs->error == XS_NOERROR && (acb->flags & ACB_CHKSENSE)) { xs->error = XS_SENSE; } else { xs->resid = acb->dleft; } xs->flags |= ITSDONE; #if AIC_DEBUG if (aic_debug & AIC_SHOWMISC) { printf("err=0x%02x ",xs->error); if (xs->error == XS_SENSE) printf("sense=%2x\n", xs->sense.error_code); } if ((xs->resid || xs->error > XS_SENSE) && aic_debug & AIC_SHOWMISC) { if (xs->resid) printf("aic_done: resid=%d\n", xs->resid); if (xs->error) printf("aic_done: error=%d\n", xs->error); } #endif /* * Remove the ACB from whatever queue it's on. We have to do a bit of * a hack to figure out which queue it's on. Note that it is *not* * necessary to cdr down the ready queue, but we must cdr down the * nexus queue and see if it's there, so we can mark the unit as no * longer busy. This code is sickening, but it works. */ if (acb == aic->nexus) { aic->state = AIC_IDLE; aic->tinfo[sc->target].lubusy &= ~(1<lun); aic_sched(aic); } else if (aic->ready_list.tqh_last == &acb->chain.tqe_next) { TAILQ_REMOVE(&aic->ready_list, acb, chain); } else { register struct acb *acb2; for (acb2 = aic->nexus_list.tqh_first; acb2; acb2 = acb2->chain.tqe_next) if (acb2 == acb) { TAILQ_REMOVE(&aic->nexus_list, acb, chain); aic->tinfo[sc->target].lubusy &= ~(1<lun); /* XXXX Should we call aic_sched() here? */ break; } if (acb2) ; else if (acb->chain.tqe_next) { TAILQ_REMOVE(&aic->ready_list, acb, chain); } else { #ifdef __FreeBSD__ printf("aic%d: can't find matching acb\n", unit); #else printf("%s: can't find matching acb\n", aic->sc_dev.dv_xname); #endif Debugger(); } } /* Put it on the free list. */ acb->flags = ACB_FREE; TAILQ_INSERT_HEAD(&aic->free_list, acb, chain); aic->tinfo[sc->target].cmds++; scsi_done(xs); return; } /* * INTERRUPT/PROTOCOL ENGINE */ /* The message system: * This is a revamped message system that now should easier accomodate new * messages, if necessary. * Currently we accept these messages: * IDENTIFY (when reselecting) * COMMAND COMPLETE # (expect bus free after messages marked #) * NOOP * MESSAGE REJECT * SYNCHRONOUS DATA TRANSFER REQUEST * SAVE DATA POINTER * RESTORE POINTERS * DISCONNECT # * * We may send these messages in prioritized order: * BUS DEVICE RESET # if SCSI_RESET & xs->flags (or in weird sits.) * MESSAGE PARITY ERROR par. err. during MSGI * MESSAGE REJECT If we get a message we don't know how to handle * ABORT # send on errors * INITIATOR DETECTED ERROR also on errors (SCSI2) (during info xfer) * IDENTIFY At the start of each transfer * SYNCHRONOUS DATA TRANSFER REQUEST if appropriate * NOOP if nothing else fits the bill ... */ #define aic_sched_msgout(m) \ do { \ orreg(SCSISIGO, ATNO); \ aic->msgpriq |= (m); \ } while (0) #define IS1BYTEMSG(m) (((m) != 1 && (m) < 0x20) || (m) >= 0x80) #define IS2BYTEMSG(m) (((m) & 0xf0) == 0x20) #define ISEXTMSG(m) ((m) == 1) /* Precondition: * The SCSI bus is already in the MSGI phase and there is a message byte * on the bus, along with an asserted REQ signal. */ static void aic_msgin(aic) #ifdef __FreeBSD__ register struct aic_data *aic; #else register struct aic_softc *aic; #endif { register u_short iobase = aic->iobase; int spincount, extlen; u_char sstat1; AIC_TRACE(("aic_msgin ")); outb(SCSISIGO, PH_MSGI); /* Prepare for a new message. A message should (according to the SCSI * standard) be transmitted in one single message_in phase. * If we have been in some other phase, then this is a new message. */ if (aic->prevphase != PH_MSGI) { aic->flags &= ~AIC_DROP_MSGI; aic->imlen = 0; } /* * Read a whole message but the last byte. If we shall reject the * message, we shall have to do it, by asserting ATNO, during the * message transfer phase itself. */ for (;;) { sstat1 = inb(SSTAT1); /* If parity errors just dump everything on the floor, also * a parity error automatically sets ATNO */ if (sstat1 & SCSIPERR) { aic_sched_msgout(SEND_PARITY_ERROR); aic->flags |= AIC_DROP_MSGI; } /* * If we're going to reject the message, don't bother storing * the incoming bytes. But still, we need to ACK them. */ if (!(aic->flags & AIC_DROP_MSGI)) { /* Get next message byte */ aic->imess[aic->imlen] = inb(SCSIDAT); /* * This testing is suboptimal, but most messages will * be of the one byte variety, so it should not effect * performance significantly. */ if (IS1BYTEMSG(aic->imess[0])) break; if (IS2BYTEMSG(aic->imess[0]) && aic->imlen == 1) break; if (ISEXTMSG(aic->imess[0]) && aic->imlen > 0) { if (aic->imlen == AIC_MAX_MSG_LEN) { aic->flags |= AIC_DROP_MSGI; aic_sched_msgout(SEND_REJECT); } extlen = aic->imess[1] ? aic->imess[1] : 256; if (aic->imlen == extlen + 2) break; /* Got it all */ } } /* If we reach this spot we're either: * a) in the middle of a multi-byte message or * b) we're dropping bytes */ outb(SXFRCTL0, CHEN|SPIOEN); inb(SCSIDAT); /* Really read it (ACK it, that is) */ outb(SXFRCTL0, CHEN); aic->imlen++; /* * We expect the bytes in a multibyte message to arrive * relatively close in time, a few microseconds apart. * Therefore we will spinwait for some small amount of time * waiting for the next byte. */ #ifdef __FreeBSD__ spincount = DELAYCOUNT * AIC_MSGI_SPIN; #else spincount = MINIFUDGE(delaycount) * AIC_MSGI_SPIN; #endif LOGLINE(aic); while (spincount-- && !((sstat1 = inb(SSTAT1)) & REQINIT)) ; if (spincount == -1 || sstat1 & (PHASEMIS|BUSFREE)) return; } /* Now we should have a complete message (1 byte, 2 byte and moderately * long extended messages). We only handle extended messages which * total length is shorter than AIC_MAX_MSG_LEN. Longer messages will * be amputated. (Return XS_BOBBITT ?) */ if (aic->state == AIC_HASNEXUS) { struct acb *acb = aic->nexus; struct aic_tinfo *ti = &aic->tinfo[acb->xs->sc_link->target]; int offs, per, rate; outb(SIMODE1, ENSCSIRST|ENPHASEMIS|ENBUSFREE|ENSCSIPERR); switch (aic->imess[0]) { case MSG_CMDCOMPLETE: if (!acb) { aic_sched_msgout(SEND_ABORT); printf("aic: CMDCOMPLETE but no command?\n"); break; } if (aic->dleft < 0) { struct scsi_link *sc = acb->xs->sc_link; printf("aic: %d extra bytes from %d:%d\n", -aic->dleft, sc->target, sc->lun); acb->dleft = 0; } acb->xs->resid = acb->dleft = aic->dleft; aic->flags |= AIC_BUSFREE_OK; untimeout(aic_timeout, (caddr_t)acb); aic_done(acb); break; case MSG_MESSAGE_REJECT: if (aic_debug & AIC_SHOWMISC) printf("aic: our msg rejected by target\n"); if (aic->flags & AIC_SYNCHNEGO) { ti->syncdata = 0; ti->persgst = ti->offsgst = 0; aic->flags &= ~AIC_SYNCHNEGO; ti->flags &= ~DO_NEGOTIATE; } /* Not all targets understand INITIATOR_DETECTED_ERR */ if (aic->msgout == SEND_INIT_DET_ERR) aic_sched_msgout(SEND_ABORT); break; case MSG_NOOP: /* Will do! Immediately, sir!*/ break; /* Hah, that was easy! */ case MSG_DISCONNECT: if (!acb) { aic_sched_msgout(SEND_ABORT); printf("aic: nothing to DISCONNECT\n"); break; } ti->dconns++; TAILQ_INSERT_HEAD(&aic->nexus_list, acb, chain); acb = aic->nexus = NULL; aic->state = AIC_IDLE; aic->flags |= AIC_BUSFREE_OK; break; case MSG_SAVEDATAPOINTER: if (!acb) { aic_sched_msgout(SEND_ABORT); printf("aic: no DATAPOINTERs to save\n"); break; } acb->dleft = aic->dleft; acb->daddr = aic->dp; break; case MSG_RESTOREPOINTERS: if (!acb) { aic_sched_msgout(SEND_ABORT); printf("aic: no DATAPOINTERs to restore\n"); break; } aic->dp = acb->daddr; aic->dleft = acb->dleft; break; case MSG_EXTENDED: switch (aic->imess[2]) { case MSG_EXT_SDTR: per = aic->imess[3] * 4; rate = (per + 49 - 100)/50; offs = aic->imess[4]; if (offs == 0) ti->syncdata = 0; else if (rate > 7) { /* Too slow for aic6360. Do asynch * instead. Renegotiate the deal. */ ti->persgst = 0; ti->offsgst = 0; aic_sched_msgout(SEND_SDTR); } else { rate = rate<<4 | offs; ti->syncdata = rate; } break; default: /* Extended messages we don't handle */ aic_sched_msgout(SEND_REJECT); break; } break; default: aic_sched_msgout(SEND_REJECT); break; } } else if (aic->state == AIC_RESELECTED) { struct scsi_link *sc; struct acb *acb; u_char selid, lunit; /* * Which target is reselecting us? (The ID bit really) */ selid = inb(SELID) & ~(1<imess[0])) { /* Identify? */ AIC_MISC(("searching ")); /* Search wait queue for disconnected cmd * The list should be short, so I haven't bothered with * any more sophisticated structures than a simple * singly linked list. */ lunit = aic->imess[0] & 0x07; for (acb = aic->nexus_list.tqh_first; acb; acb = acb->chain.tqe_next) { sc = acb->xs->sc_link; if (sc->lun == lunit && selid == (1<target)) { TAILQ_REMOVE(&aic->nexus_list, acb, chain); break; } } if (!acb) { /* Invalid reselection! */ aic_sched_msgout(SEND_ABORT); printf("aic: invalid reselect (idbit=0x%2x)\n", selid); } else { /* Reestablish nexus */ /* Setup driver data structures and * do an implicit RESTORE POINTERS */ aic->nexus = acb; aic->dp = acb->daddr; aic->dleft = acb->dleft; aic->tinfo[sc->target].lubusy |= (1<lun); outb(SCSIRATE,aic->tinfo[sc->target].syncdata); AIC_MISC(("... found acb")); aic->state = AIC_HASNEXUS; } } else { printf("aic: bogus reselect (no IDENTIFY) %0x2x\n", selid); aic_sched_msgout(SEND_DEV_RESET); } } else { /* Neither AIC_HASNEXUS nor AIC_RESELECTED! */ printf("aic: unexpected message in; will send DEV_RESET\n"); aic_sched_msgout(SEND_DEV_RESET); } /* Must not forget to ACK the last message byte ... */ outb(SXFRCTL0, CHEN|SPIOEN); inb(SCSIDAT); outb(SXFRCTL0, CHEN); outb(SIMODE1, ENSCSIRST|ENBUSFREE|ENSCSIPERR|ENREQINIT); } /* The message out (and in) stuff is a bit complicated: * If the target requests another message (sequence) without * having changed phase in between it really asks for a * retransmit, probably due to parity error(s). * The following messages can be sent: * IDENTIFY @ These 3 stems from scsi command activity * BUS_DEV_RESET @ * IDENTIFY + SDTR @ * MESSAGE_REJECT if MSGI doesn't make sense * MESSAGE_PARITY_ERROR if MSGI spots a parity error * NOOP if asked for a message and there's nothing to send */ static void aic_msgout(aic) #ifdef __FreeBSD__ register struct aic_data *aic; #else register struct aic_softc *aic; #endif { register u_short iobase = aic->iobase; struct aic_tinfo *ti; struct acb *acb; u_char dmastat, scsisig; /* First determine what to send. If we haven't seen a * phasechange this is a retransmission request. */ outb(SCSISIGO, PH_MSGO); if (aic->prevphase != PH_MSGO) { /* NOT a retransmit */ /* Pick up highest priority message */ aic->msgout = aic->msgpriq & -aic->msgpriq; /* What message? */ aic->omlen = 1; /* "Default" message len */ switch (aic->msgout) { case SEND_SDTR: /* Also implies an IDENTIFY message */ acb = aic->nexus; ti = &aic->tinfo[acb->xs->sc_link->target]; aic->omess[1] = MSG_EXTENDED; aic->omess[2] = 3; aic->omess[3] = MSG_EXT_SDTR; aic->omess[4] = ti->persgst >> 2; aic->omess[5] = ti->offsgst; aic->omlen = 6; /* Fallthrough! */ case SEND_IDENTIFY: if (aic->state != AIC_HASNEXUS) { printf("aic at line %d: no nexus", __LINE__); Debugger(); } acb = aic->nexus; aic->omess[0] = MSG_IDENTIFY(acb->xs->sc_link->lun); break; case SEND_DEV_RESET: aic->omess[0] = MSG_BUS_DEV_RESET; aic->flags |= AIC_BUSFREE_OK; break; case SEND_PARITY_ERROR: aic->omess[0] = MSG_PARITY_ERR; break; case SEND_ABORT: aic->omess[0] = MSG_ABORT; aic->flags |= AIC_BUSFREE_OK; break; case SEND_INIT_DET_ERR: aic->omess[0] = MSG_INITIATOR_DET_ERR; break; case SEND_REJECT: aic->omess[0] = MSG_MESSAGE_REJECT; break; default: aic->omess[0] = MSG_NOOP; break; } aic->omp = aic->omess; } else if (aic->omp == &aic->omess[aic->omlen]) { /* Have sent the message at least once, this is a retransmit. */ AIC_MISC(("retransmitting ")); if (aic->omlen > 1) outb(SCSISIGO, PH_MSGO|ATNO); } /* else, we're in the middle of a multi-byte message */ outb(SXFRCTL0, CHEN|SPIOEN); outb(DMACNTRL0, INTEN|RSTFIFO); outb(SIMODE1, ENSCSIRST|ENBUSFREE|ENSCSIPERR|ENREQINIT); do { LOGLINE(aic); do { aic->phase = aicphase(aic); } while (aic->phase == PH_INVALID); if (aic->phase != PH_MSGO) /* Target left MSGO, possibly to reject our * message */ break; /* Clear ATN before last byte */ if (aic->omp == &aic->omess[aic->omlen-1]) outb(CLRSINT1, CLRATNO); outb(SCSIDAT, *aic->omp++); /* Send MSG */ LOGLINE(aic); while (inb(SCSISIGI) & ACKO) ; } while (aic->omp != &aic->omess[aic->omlen]); aic->progress = aic->omp != aic->omess; /* We get here in two ways: * a) phase != MSGO. Target is probably going to reject our message * b) aic->omp == &aic->omess[aic->omlen], i.e. the message has been * transmitted correctly and accepted by the target. */ if (aic->phase == PH_MSGO) { /* Message accepted by target! */ aic->msgpriq &= ~aic->msgout; aic->msgout = 0; } outb(SXFRCTL0, CHEN); /* Disable SPIO */ outb(SIMODE0, 0); /* Setup interrupts before leaving */ outb(SIMODE1, ENSCSIRST|ENBUSFREE|ENSCSIPERR|ENREQINIT); /* Enabled ints: SCSIPERR, SCSIRSTI (unexpected) * REQINIT (expected) BUSFREE (possibly expected) */ } /* aic_dataout: perform a data transfer using the FIFO datapath in the aic6360 * Precondition: The SCSI bus should be in the DOUT phase, with REQ asserted * and ACK deasserted (i.e. waiting for a data byte) * This new revision has been optimized (I tried) to make the common case fast, * and the rarer cases (as a result) somewhat more comlex */ void aic_dataout(aic) register struct aic_data *aic; { register u_short iobase = aic->iobase; register u_char dmastat; struct acb *acb = aic->nexus; int amount, olddleft = aic->dleft; #define DOUTAMOUNT 128 /* Full FIFO */ /* Enable DATA OUT transfers */ outb(SCSISIGO, PH_DOUT); outb(CLRSINT1, CLRPHASECHG); /* Clear FIFOs and counters */ outb(SXFRCTL0, CHEN|CLRSTCNT|CLRCH); outb(DMACNTRL0, WRITE|INTEN|RSTFIFO); /* Enable FIFOs */ outb(SXFRCTL0, SCSIEN|DMAEN|CHEN); outb(DMACNTRL0, ENDMA|DWORDPIO|WRITE|INTEN); /* Setup to detect: * PHASEMIS & PHASECHG: target has left the DOUT phase * SCSIRST: something just pulled the RST line. * BUSFREE: target has unexpectedly left the DOUT phase */ outb(SIMODE1, ENPHASEMIS|ENSCSIRST|ENBUSFREE|ENPHASECHG); /* I have tried to make the main loop as tight as possible. This * means that some of the code following the loop is a bit more * complex than otherwise. */ while (aic->dleft) { int xfer; LOGLINE(aic); for (;;) { dmastat = inb(DMASTAT); if (dmastat & DFIFOEMP) break; if (dmastat & INTSTAT) goto phasechange; } xfer = min(DOUTAMOUNT, aic->dleft); #if AIC_USE_DWORDS if (xfer >= 12) { outsl(DMADATALONG, aic->dp, xfer/4); aic->dleft -= xfer & ~3; aic->dp += xfer & ~3; xfer &= 3; } #else if (xfer >= 8) { outsw(DMADATA, aic->dp, xfer/2); aic->dleft -= xfer & ~1; aic->dp += xfer & ~1; xfer &= 1; } #endif if (xfer) { outb(DMACNTRL0, ENDMA|B8MODE|INTEN); outsb(DMADATA, aic->dp, xfer); aic->dleft -= xfer; aic->dp += xfer; outb(DMACNTRL0, ENDMA|DWORDPIO|INTEN); } } /* See the bytes off chip */ for (;;) { dmastat = inb(DMASTAT); if ((dmastat & DFIFOEMP) && (inb(SSTAT2) & SEMPTY)) break; if (dmastat & INTSTAT) goto phasechange; } phasechange: /* We now have the data off chip. */ outb(SXFRCTL0, CHEN); if (dmastat & INTSTAT) { /* Some sort of phasechange */ register u_char sstat2; /* Stop transfers, do some accounting */ amount = inb(FIFOSTAT); sstat2 = inb(SSTAT2); if ((sstat2 & 7) == 0) amount += sstat2 & SFULL ? 8 : 0; else amount += sstat2 & 7; aic->dleft += amount; aic->dp -= amount; AIC_MISC(("+%d ", amount)); } outb(DMACNTRL0, RSTFIFO|INTEN); LOGLINE(aic); while (inb(SXFRCTL0) & SCSIEN) ; outb(SIMODE1, ENSCSIRST|ENBUSFREE|ENSCSIPERR|ENREQINIT); /* Enabled ints: BUSFREE, SCSIPERR, SCSIRSTI (unexpected) * REQINIT (expected) */ aic->progress = olddleft != aic->dleft; return; } /* aic_datain: perform data transfers using the FIFO datapath in the aic6360 * Precondition: The SCSI bus should be in the DIN phase, with REQ asserted * and ACK deasserted (i.e. at least one byte is ready). * For now, uses a pretty dumb algorithm, hangs around until all data has been * transferred. This, is OK for fast targets, but not so smart for slow * targets which don't disconnect or for huge transfers. */ void aic_datain(aic) #ifdef __FreeBSD__ register struct aic_data *aic; #else register struct aic_softc *aic; #endif { register u_short iobase = aic->iobase; register u_char dmastat; struct acb *acb = aic->nexus; int amount, olddleft = aic->dleft; #define DINAMOUNT 128 /* Default amount of data to transfer */ /* Enable DATA IN transfers */ outb(SCSISIGO, PH_DIN); outb(CLRSINT1, CLRPHASECHG); /* Clear FIFOs and counters */ outb(SXFRCTL0, CHEN|CLRSTCNT|CLRCH); outb(DMACNTRL0, INTEN|RSTFIFO); /* Enable FIFOs */ outb(SXFRCTL0, SCSIEN|DMAEN|CHEN); outb(DMACNTRL0, ENDMA|DWORDPIO|INTEN); outb(SIMODE1, ENSCSIRST|ENPHASEMIS|ENBUSFREE|ENPHASECHG); /* We leave this loop if one or more of the following is true: * a) phase != PH_DIN && FIFOs are empty * b) SCSIRSTI is set (a reset has occurred) or busfree is detected. */ while (aic->dleft) { int done = 0; int xfer; LOGLINE(aic); /* Wait for fifo half full or phase mismatch */ for (;;) { dmastat = inb(DMASTAT); if (dmastat & (DFIFOFULL|INTSTAT)) break; } if (dmastat & DFIFOFULL) xfer = DINAMOUNT; else { while ((inb(SSTAT2) & SEMPTY) == 0) ; xfer = inb(FIFOSTAT); done = 1; } xfer = min(xfer, aic->dleft); #if AIC_USE_DWORDS if (xfer >= 12) { insl(DMADATALONG, aic->dp, xfer/4); aic->dleft -= xfer & ~3; aic->dp += xfer & ~3; xfer &= 3; } #else if (xfer >= 8) { insw(DMADATA, aic->dp, xfer/2); aic->dleft -= xfer & ~1; aic->dp += xfer & ~1; xfer &= 1; } #endif if (xfer) { outb(DMACNTRL0, ENDMA|B8MODE|INTEN); insb(DMADATA, aic->dp, xfer); aic->dleft -= xfer; aic->dp += xfer; outb(DMACNTRL0, ENDMA|DWORDPIO|INTEN); } if (done) break; } #if 0 if (aic->dleft) printf("residual of %d\n", aic->dleft); #endif aic->progress = olddleft != aic->dleft; /* Some SCSI-devices are rude enough to transfer more data than what * was requested, e.g. 2048 bytes from a CD-ROM instead of the * requested 512. Test for progress, i.e. real transfers. If no real * transfers have been performed (acb->dleft is probably already zero) * and the FIFO is not empty, waste some bytes.... */ if (!aic->progress) { int extra = 0; LOGLINE(aic); for (;;) { dmastat = inb(DMASTAT); if (dmastat & DFIFOEMP) break; (void) inb(DMADATA); /* Throw it away */ extra++; } AIC_MISC(("aic: %d extra bytes from %d:%d\n", extra, acb->xs->sc_link->target, acb->xs->sc_link->lun)); aic->progress = extra; } /* Stop the FIFO data path */ outb(SXFRCTL0, CHEN); outb(DMACNTRL0, RSTFIFO|INTEN); /* Come back when REQ is set again */ outb(SIMODE1, ENSCSIRST|ENBUSFREE|ENSCSIPERR|ENREQINIT); LOGLINE(aic); } /* * This is the workhorse routine of the driver. * Deficiencies (for now): * 1) always uses programmed I/O * 2) doesn't support synchronous transfers properly (yet) */ int #ifdef __FreeBSD__ aicintr(int unit) #else aicintr(aic) register struct aic_softc *aic; #endif { #ifdef __FreeBSD__ struct aic_data *aic = aicdata[unit]; #else struct scsi_xfer *xs; #endif register struct acb *acb; register struct scsi_link *sc; register u_short iobase = aic->iobase; struct aic_tinfo *ti; int done, amount; u_char sstat0, sstat1, scsisig, dmastat, sstat2; u_char scsiseq, simode0, simode1, sxfrctl0; LOGLINE(aic); /* Clear INTEN. This is important if we're running with edge * triggered interrupts as we don't guarantee that all interrupts will * be served during one single invocation of this routine, i.e. we may * need another edge. */ outb(DMACNTRL0, 0); AIC_TRACE(("aicintr\n")); /* * 1st check for abnormal conditions, such as reset or parity errors */ sstat1 = inb(SSTAT1); AIC_MISC(("s1:0x%02x ", sstat1)); if (sstat1 & (SCSIRSTI|SCSIPERR)) { if (sstat1 & SCSIRSTI) { printf("aic: reset in -- reinitializing....\n"); aic_init(aic); /* Restart everything */ LOGLINE(aic); outb(DMACNTRL0, INTEN); return 1; } else { printf("aic: SCSI bus parity error\n"); outb(CLRSINT1, CLRSCSIPERR); if (aic->prevphase == PH_MSGI) aic_sched_msgout(SEND_PARITY_ERROR); else aic_sched_msgout(SEND_INIT_DET_ERR); } } /* * If we're not already busy doing something test for the following * conditions: * 1) We have been reselected by something * 2) We have selected something successfully * 3) Our selection process has timed out * 4) This is really a bus free interrupt just to get a new command * going? * 5) Spurious interrupt? */ sstat0 = inb(SSTAT0); AIC_MISC(("s0:0x%02x ", sstat0)); if (aic->state != AIC_HASNEXUS) { /* No nexus yet */ if (sstat0 & SELDI) { LOGLINE(aic); /* We have been reselected. Things to do: * a) If we're trying to select something ourselves * back off the current command. * b) "Wait" for a message in phase (IDENTIFY) * c) Call aic_msgin() to get the identify message and * retrieve the disconnected command from the wait * queue. */ AIC_MISC(("reselect ")); /* If we're trying to select a target ourselves, * push our command back into the rdy list. */ if (aic->state == AIC_SELECTING) { AIC_MISC(("backoff selector ")); TAILQ_INSERT_HEAD(&aic->ready_list, aic->nexus, chain); aic->nexus = NULL; } aic->state = AIC_RESELECTED; /* Clear interrupts, disable future selection stuff * including select interrupts and timeouts */ outb(CLRSINT0, CLRSELDI); outb(SCSISEQ, 0); outb(SIMODE0, 0); /* Setup chip so we may detect spurious busfree * conditions later. */ outb(CLRSINT1, CLRBUSFREE); outb(SIMODE1, ENSCSIRST|ENBUSFREE| ENSCSIPERR|ENREQINIT); /* Now, we're expecting an IDENTIFY message. */ aic->phase = aicphase(aic); if (aic->phase & PH_PSBIT) { LOGLINE(aic); outb(DMACNTRL0, INTEN); return 1; /* Come back when REQ is set */ } if (aic->phase == PH_MSGI) aic_msgin(aic); /* Handle identify message */ else { /* Things are seriously fucked up. * Pull the brakes, i.e. RST */ printf("aic at line %d: target didn't identify\n", __LINE__); Debugger(); aic_init(aic); return 1; } if (aic->state != AIC_HASNEXUS) {/* IDENTIFY fail?! */ printf("aic at line %d: identify failed\n", __LINE__); aic_init(aic); return 1; } else { outb(SIMODE1, ENSCSIRST|ENBUSFREE|ENSCSIPERR|ENREQINIT); /* Fallthrough to HASNEXUS part of aicintr */ } } else if (sstat0 & SELDO) { LOGLINE(aic); /* We have selected a target. Things to do: * a) Determine what message(s) to send. * b) Verify that we're still selecting the target. * c) Mark device as busy. */ acb = aic->nexus; if (!acb) { printf("aic at line %d: missing acb", __LINE__); Debugger(); } sc = acb->xs->sc_link; ti = &aic->tinfo[sc->target]; if (acb->xs->flags & SCSI_RESET) aic->msgpriq = SEND_DEV_RESET; else if (ti->flags & DO_NEGOTIATE) aic->msgpriq = SEND_IDENTIFY|SEND_SDTR; else aic->msgpriq = SEND_IDENTIFY; /* Setup chip to enable later testing for busfree * conditions */ outb(CLRSINT1, CLRBUSFREE); outb(SCSISEQ, 0); /* Stop selection stuff */ nandreg(SIMODE0, ENSELDO); /* No more selectout ints */ sstat0 = inb(SSTAT0); if (sstat0 & SELDO) { /* Still selected!? */ outb(SIMODE0, 0); outb(SIMODE1, ENSCSIRST|ENSCSIPERR| ENBUSFREE|ENREQINIT); aic->state = AIC_HASNEXUS; aic->flags = 0; aic->prevphase = PH_INVALID; aic->dp = acb->daddr; aic->dleft = acb->dleft; ti->lubusy |= (1<lun); AIC_MISC(("select ok ")); } else { /* Has seen busfree since selection, i.e. * a "spurious" selection. Shouldn't happen. */ printf("aic: unexpected busfree\n"); #ifdef __FreeBSD__ acb->xs->error = XS_DRIVER_STUFFUP; #else xs->error = XS_DRIVER_STUFFUP; #endif untimeout(aic_timeout, (caddr_t)acb); aic_done(acb); } LOGLINE(aic); outb(DMACNTRL0, INTEN); return 1; } else if (sstat1 & SELTO) { /* Selection timed out. What to do: * Disable selections out and fail the command with * code XS_TIMEOUT. */ acb = aic->nexus; if (!acb) { printf("aic at line %d: missing acb", __LINE__); Debugger(); } outb(SCSISEQ, ENRESELI|ENAUTOATNP); outb(SXFRCTL1, 0); outb(CLRSINT1, CLRSELTIMO); aic->state = AIC_IDLE; acb->xs->error = XS_TIMEOUT; untimeout(aic_timeout, (caddr_t)acb); aic_done(acb); LOGLINE(aic); outb(DMACNTRL0, INTEN); return 1; } else { /* Assume a bus free interrupt. What to do: * Start selecting. */ if (aic->state == AIC_IDLE) aic_sched(aic); #if AIC_DEBUG else AIC_MISC(("Extra aic6360 interrupt.")); #endif LOGLINE(aic); outb(DMACNTRL0, INTEN); return 1; } } /* Driver is now in state AIC_HASNEXUS, i.e. we have a current command * working the SCSI bus. */ acb = aic->nexus; if (aic->state != AIC_HASNEXUS || acb == NULL) { printf("aic: no nexus!!\n"); Debugger(); } /* What sort of transfer does the bus signal? */ aic->phase = aicphase(aic); if (!(aic->phase & PH_PSBIT)) /* not a pseudo phase */ outb(SCSISIGO, aic->phase); outb(CLRSINT1, CLRPHASECHG); /* These interrupts are enabled by default: * SCSIRSTI, SCSIPERR, BUSFREE, REQINIT */ switch (aic->phase) { case PH_MSGO: LOGLINE(aic); if (aic_debug & AIC_SHOWMISC) printf("PH_MSGO "); aic_msgout(aic); aic->prevphase = PH_MSGO; /* Setup interrupts before leaving */ outb(SIMODE0, 0); outb(SIMODE1, ENSCSIRST|ENBUSFREE|ENSCSIPERR|ENREQINIT); /* Enabled ints: SCSIPERR, SCSIRSTI (unexpected) * REQINIT (expected) BUSFREE (possibly expected) */ break; case PH_CMD: /* CMD phase & REQ asserted */ LOGLINE(aic); if (aic_debug & AIC_SHOWMISC) printf("PH_CMD 0x%02x (%d) ", acb->cmd.opcode, acb->clen); outb(SCSISIGO, PH_CMD); /* Use FIFO for CMDs. Assumes that no cmd > 128 bytes. OK? */ /* Clear hostFIFO and enable EISA-hostFIFO transfers */ outb(DMACNTRL0, WRITE|RSTFIFO|INTEN); /* 3(4) */ /* Clear scsiFIFO and enable SCSI-interface & hostFIFO-scsiFIFO transfers */ outb(SXFRCTL0, CHEN|CLRCH|CLRSTCNT); /* 4 */ outb(SXFRCTL0, SCSIEN|DMAEN|CHEN); /* 5 */ outb(DMACNTRL0, ENDMA|WRITE|INTEN); /* 3+6 */ /* What (polled) interrupts to enable */ outb(SIMODE1, ENPHASEMIS|ENSCSIRST|ENBUSFREE|ENSCSIPERR); /* DFIFOEMP is set, FIFO (128 byte) is always big enough */ outsw(DMADATA, (short *)&acb->cmd, acb->clen>>1); /* Wait for SCSI FIFO to drain */ LOGLINE(aic); do { sstat2 = inb(SSTAT2); } while (!(sstat2 & SEMPTY) && !(inb(DMASTAT) & INTSTAT)); if (!(inb(SSTAT2) & SEMPTY)) { printf("aic at line %d: SCSI-FIFO didn't drain\n", __LINE__); Debugger(); acb->xs->error = XS_DRIVER_STUFFUP; untimeout(aic_timeout, (caddr_t)acb); aic_done(acb); aic_init(aic); return 1; } outb(SXFRCTL0, CHEN); /* Clear SCSIEN & DMAEN */ outb(SIMODE0, 0); outb(SIMODE1, ENSCSIRST|ENBUSFREE|ENSCSIPERR); LOGLINE(aic); do { sxfrctl0 = inb(SXFRCTL0); } while (sxfrctl0 & SCSIEN && !(inb(DMASTAT) & INTSTAT)); if (sxfrctl0 & SCSIEN) { printf("aic at line %d: scsi xfer never finished\n", __LINE__); Debugger(); acb->xs->error = XS_DRIVER_STUFFUP; untimeout(aic_timeout, (caddr_t)acb); aic_done(acb); aic_init(aic); return 1; } outb(SIMODE1, ENSCSIRST|ENBUSFREE|ENSCSIPERR|ENREQINIT); /* Enabled ints: BUSFREE, SCSIPERR, SCSIRSTI (unexpected) * REQINIT (expected) */ aic->prevphase = PH_CMD; break; case PH_DOUT: LOGLINE(aic); AIC_MISC(("PH_DOUT [%d] ",aic->dleft)); aic_dataout(aic); aic->prevphase = PH_DOUT; break; case PH_MSGI: LOGLINE(aic); if (aic_debug & AIC_SHOWMISC) printf("PH_MSGI "); aic_msgin(aic); outb(SIMODE1, ENSCSIRST|ENBUSFREE|ENSCSIPERR|ENREQINIT); aic->prevphase = PH_MSGI; break; case PH_DIN: LOGLINE(aic); if (aic_debug & AIC_SHOWMISC) printf("PH_DIN "); aic_datain(aic); aic->prevphase = PH_DIN; break; case PH_STAT: LOGLINE(aic); if (aic_debug & AIC_SHOWMISC) printf("PH_STAT "); outb(SCSISIGO, PH_STAT); outb(SXFRCTL0, CHEN|SPIOEN); outb(DMACNTRL0, RSTFIFO|INTEN); outb(SIMODE1, ENSCSIRST|ENPHASEMIS|ENBUSFREE|ENSCSIPERR); acb->stat = inb(SCSIDAT); outb(SXFRCTL0, CHEN); if (aic_debug & AIC_SHOWMISC) printf("0x%02x ", acb->stat); outb(SIMODE1, ENSCSIRST|ENBUSFREE|ENSCSIPERR|ENREQINIT); aic->prevphase = PH_STAT; break; case PH_INVALID: LOGLINE(aic); break; case PH_BUSFREE: LOGLINE(aic); if (aic->flags & AIC_BUSFREE_OK) { /*It's fun the 1st time.. */ aic->flags &= ~AIC_BUSFREE_OK; } else { printf("aic at line %d: unexpected busfree phase\n", __LINE__); Debugger(); } break; default: printf("aic at line %d: bogus bus phase\n", __LINE__); Debugger(); break; } LOGLINE(aic); outb(DMACNTRL0, INTEN); return 1; } void aic_timeout(void *arg1) { int s = splbio(); struct acb *acb = (struct acb *)arg1; #ifdef __FreeBSD__ int unit; struct aic_data *aic; #else struct aic_softc *aic; #endif #ifdef __FreeBSD__ unit = acb->xs->sc_link->adapter_unit; aic = aicdata[unit]; #else aic = acb->xs->sc_link->adapter_softc; #endif sc_print_addr(acb->xs->sc_link); acb->xs->error = XS_TIMEOUT; printf("timed out\n"); aic_done(acb); splx(s); } #if AIC_DEBUG /* * The following functions are mostly used for debugging purposes, either * directly called from the driver or from the kernel debugger. */ void aic_show_scsi_cmd(acb) struct acb *acb; { u_char *b = (u_char *)&acb->cmd; struct scsi_link *sc = acb->xs->sc_link; int i; sc_print_addr(sc); if (!(acb->xs->flags & SCSI_RESET)) { for (i = 0; i < acb->clen; i++) { if (i) printf(","); printf("%x", b[i]); } printf("\n"); } else printf("RESET\n"); } void aic_print_acb(acb) struct acb *acb; { printf("acb@%x xs=%x flags=%x", acb, acb->xs, acb->flags); printf(" daddr=%x dleft=%d stat=%x\n", (long)acb->daddr, acb->dleft, acb->stat); aic_show_scsi_cmd(acb); } void aic_print_active_acb() { struct acb *acb; #ifdef __FreeBSD__ struct aic_data *aic = aicdata[0]; #else struct aic_softc *aic = aiccd.cd_devs[0]; #endif printf("ready list:\n"); for (acb = aic->ready_list.tqh_first; acb; acb = acb->chain.tqe_next) aic_print_acb(acb); printf("nexus:\n"); if (aic->nexus) aic_print_acb(aic->nexus); printf("nexus list:\n"); for (acb = aic->nexus_list.tqh_first; acb; acb = acb->chain.tqe_next) aic_print_acb(acb); } void aic_dump6360() { u_short iobase = 0x340; printf("aic6360: SCSISEQ=%x SXFRCTL0=%x SXFRCTL1=%x SCSISIGI=%x\n", inb(SCSISEQ), inb(SXFRCTL0), inb(SXFRCTL1), inb(SCSISIGI)); printf(" SSTAT0=%x SSTAT1=%x SSTAT2=%x SSTAT3=%x SSTAT4=%x\n", inb(SSTAT0), inb(SSTAT1), inb(SSTAT2), inb(SSTAT3), inb(SSTAT4)); printf(" SIMODE0=%x SIMODE1=%x DMACNTRL0=%x DMACNTRL1=%x DMASTAT=%x\n", inb(SIMODE0), inb(SIMODE1), inb(DMACNTRL0), inb(DMACNTRL1), inb(DMASTAT)); printf(" FIFOSTAT=%d SCSIBUS=0x%x\n", inb(FIFOSTAT), inb(SCSIBUS)); } void aic_dump_driver() { #ifdef __FreeBSD__ struct aic_data *aic = aicdata[0]; #else struct aic_softc *aic = aiccd.cd_devs[0]; #endif struct aic_tinfo *ti; int i; printf("nexus=%x phase=%x prevphase=%x\n", aic->nexus, aic->phase, aic->prevphase); printf("state=%x msgin=%x msgpriq=%x msgout=%x imlen=%d omlen=%d\n", aic->state, aic->imess[0], aic->msgpriq, aic->msgout, aic->imlen, aic->omlen); printf("history:"); i = aic->hp; do { printf(" %d", aic->history[i]); i = (i + 1) % AIC_HSIZE; } while (i != aic->hp); printf("*\n"); for (i = 0; i < 7; i++) { ti = &aic->tinfo[i]; printf("tinfo%d: %d cmds %d disconnects %d timeouts", i, ti->cmds, ti->dconns, ti->touts); printf(" %d senses flags=%x\n", ti->senses, ti->flags); } } #endif