/* $NetBSD: sii.c,v 1.13 2016/12/12 15:58:44 maya Exp $ */ /*- * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Ralph Campbell and Rick Macklem. * * 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. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. * * @(#)sii.c 8.2 (Berkeley) 11/30/93 * * from: Header: /sprite/src/kernel/dev/ds3100.md/RCS/devSII.c, * v 9.2 89/09/14 13:37:41 jhh Exp $ SPRITE (DECWRL)"; */ #include __KERNEL_RCSID(0, "$NetBSD: sii.c,v 1.13 2016/12/12 15:58:44 maya Exp $"); #include "sii.h" /* * SCSI interface driver */ #include #include #include #include #include #include #include #include #include #include #include /* old 4.4BSD/pmax scsi drivers */ #include /* device registers */ #include /* softc and prototypes */ #include /* prom_scsiid prototype */ /* XXX not in dev/scsipi/scsi_message.h */ #define MSG_EXT_MODIFY_DATA_PTR 0x00 extern struct cfdriver sii_cd; /* * MACROS for timing out spin loops. * * Wait until expression is true. * * Control register bits can change at any time so when the CPU * reads a register, the bits might change and * invalidate the setup and hold times for the CPU. * This macro reads the register twice to be sure the value is stable. * * args: var - variable to save control register contents * reg - control register to read * expr - expression to spin on * spincount - maximum number of times through the loop * cntr - variable for number of tries */ #define SII_WAIT_UNTIL(var, reg, expr, spincount, cntr) { \ u_int tmp = reg; \ for (cntr = 0; cntr < spincount; cntr++) { \ while (tmp != (var = reg)) \ tmp = var; \ if (expr) \ break; \ if (cntr >= 100) \ DELAY(100); \ } \ } #ifdef DEBUG int sii_debug = 1; int sii_debug_cmd; int sii_debug_bn; int sii_debug_sz; #define NLOG 16 struct sii_log { u_short cstat; u_short dstat; u_short comm; u_short msg; int rlen; int dlen; int target; } sii_log[NLOG], *sii_logp = sii_log; #endif static u_char sii_buf[256]; /* used for extended messages */ #define NORESET 0 #define RESET 1 #define NOWAIT 0 #define WAIT 1 /* * Define a safe address in the SCSI buffer for doing status & message DMA * XXX why not add another field to softc? */ #define SII_BUF_ADDR(sc) ((sc)->sc_buf + SII_MAX_DMA_XFER_LENGTH * 14) /* * Forward references */ static void sii_Reset(struct siisoftc *sc, int resetbus); static void sii_StartCmd(struct siisoftc *sc, int target); static void sii_CmdDone(struct siisoftc *sc, int target, int error); static void sii_DoIntr(struct siisoftc *sc, u_int dstat); static void sii_StateChg(struct siisoftc *sc, u_int cstat); static int sii_GetByte(SIIRegs *regs, int phase, int ack); static void sii_DoSync(SIIRegs *regs, State *state); static void sii_StartDMA(SIIRegs *regs, int phase, u_short *dmaAddr, int size); #ifdef DEBUG static void sii_DumpLog(void); #endif /* * Match driver based on name */ void siiattach(struct siisoftc *sc) { int i; sc->sc_target = -1; /* no command active */ /* * Give each target its own DMA buffer region. * Make it big enough for 2 max transfers so we can ping pong buffers * while we copy the data. */ for (i = 0; i < SII_NCMD; i++) { sc->sc_st[i].dmaAddr[0] = (u_short *) sc->sc_buf + 2 * SII_MAX_DMA_XFER_LENGTH * i; sc->sc_st[i].dmaAddr[1] = sc->sc_st[i].dmaAddr[0] + SII_MAX_DMA_XFER_LENGTH; } sii_Reset(sc, RESET); printf(": target %d\n", sc->sc_regs->id & SII_IDMSK); sc->sc_adapter.adapt_dev = sc->sc_dev; sc->sc_adapter.adapt_nchannels = 1; sc->sc_adapter.adapt_openings = 7; sc->sc_adapter.adapt_max_periph = 1; sc->sc_adapter.adapt_ioctl = NULL; sc->sc_adapter.adapt_minphys = minphys; sc->sc_adapter.adapt_request = sii_scsi_request; sc->sc_channel.chan_adapter = &sc->sc_adapter; sc->sc_channel.chan_bustype = &scsi_bustype; sc->sc_channel.chan_channel = 0; sc->sc_channel.chan_ntargets = 8; sc->sc_channel.chan_nluns = 8; sc->sc_channel.chan_id = sc->sc_regs->id & SII_IDMSK; /* * Now try to attach all the sub-devices */ config_found(sc->sc_dev, &sc->sc_channel, scsiprint); } /* * Start activity on a SCSI device. * We maintain information on each device separately since devices can * connect/disconnect during an operation. */ void sii_scsi_request(struct scsipi_channel *chan, scsipi_adapter_req_t req, void *arg) { struct scsipi_xfer *xs; struct scsipi_periph *periph; struct siisoftc *sc; int target; int s; int count; sc = device_private(chan->chan_adapter->adapt_dev); switch (req) { case ADAPTER_REQ_RUN_XFER: xs = arg; periph = xs->xs_periph; target = periph->periph_target; s = splbio(); if (sc->sc_cmd[target]) { splx(s); xs->error = XS_RESOURCE_SHORTAGE; scsipi_done(xs); printf("[busy at start]\n"); return; } /* * Build a ScsiCmd for this command and start it. */ sc->sc_xs[target] = xs; sc->sc_cmd[target] = &sc->sc_cmd_fake[target]; /* XXX */ sc->sc_cmd[target]->unit = 0; sc->sc_cmd[target]->flags = 0; sc->sc_cmd[target]->buflen = xs->datalen; sc->sc_cmd[target]->buf = xs->data; sc->sc_cmd[target]->cmdlen = xs->cmdlen; sc->sc_cmd[target]->cmd = (u_char *)xs->cmd; sc->sc_cmd[target]->lun = xs->xs_periph->periph_lun; sii_StartCmd(sc, target); splx(s); if ((xs->xs_control & XS_CTL_POLL) == 0) return; count = xs->timeout; while (count) { if ((xs->xs_status & XS_STS_DONE) != 0) return; siiintr(sc); /* XXX schedule another command? */ DELAY(1000); --count; } xs->error = XS_TIMEOUT; scsipi_done(xs); return; case ADAPTER_REQ_GROW_RESOURCES: /* XXX Not supported. */ return; case ADAPTER_REQ_SET_XFER_MODE: /* XXX Not supported. */ return; } } /* * Check to see if any SII chips have pending interrupts * and process as appropriate. */ int siiintr(void *xxxsc) { struct siisoftc *sc = xxxsc; u_int dstat; /* * Find which controller caused the interrupt. */ dstat = sc->sc_regs->dstat; if (dstat & (SII_CI | SII_DI)) { sii_DoIntr(sc, dstat); return (0); /* XXX */ } return (1); /* XXX spurious interrupt? */ } /* * Reset the SII chip and do a SCSI reset if 'reset' is true. * NOTE: if !cold && reset, should probably probe for devices * since a SCSI bus reset will set UNIT_ATTENTION. */ static void sii_Reset(struct siisoftc* sc, int reset) /* reset: TRUE => reset SCSI bus */ { SIIRegs *regs = sc->sc_regs; #ifdef DEBUG if (sii_debug > 1) printf("sii: RESET\n"); #endif /* * Reset the SII chip. */ regs->comm = SII_CHRESET; /* * Set arbitrated bus mode. */ regs->csr = SII_HPM; /* * Set host adapter ID (from PROM sciiidN variable). */ /* XXX device_unit() abuse */ regs->id = SII_ID_IO | prom_scsiid(device_unit(sc->sc_dev)); /* * Enable SII to drive the SCSI bus. */ regs->dictrl = SII_PRE; regs->dmctrl = 0; if (reset) { int i; /* * Assert SCSI bus reset for at least 25 Usec to clear the * world. SII_DO_RST is self clearing. * Delay 250 ms before doing any commands. */ regs->comm = SII_DO_RST; wbflush(); DELAY(250000); /* rearbitrate synchronous offset */ for (i = 0; i < SII_NCMD; i++) sc->sc_st[i].dmaReqAck = 0; } /* * Clear any pending interrupts from the reset. */ regs->cstat = regs->cstat; regs->dstat = regs->dstat; /* * Set up SII for arbitrated bus mode, SCSI parity checking, * Reselect Enable, and Interrupt Enable. */ regs->csr = SII_HPM | SII_RSE | SII_PCE | SII_IE; wbflush(); } /* * Start a SCSI command by sending the cmd data * to a SCSI controller via the SII. * Call the device done procedure if it can't be started. * NOTE: we should be called with interrupts disabled. */ static void sii_StartCmd(struct siisoftc *sc, int target) /* sc: which SII to use */ /* target: which command to start */ { SIIRegs *regs; ScsiCmd *scsicmd; State *state; u_int status; int error, retval; /* if another command is currently in progress, just wait */ if (sc->sc_target >= 0) return; /* initialize state information for this command */ scsicmd = sc->sc_cmd[target]; state = &sc->sc_st[target]; state->flags = FIRST_DMA; state->prevComm = 0; state->dmalen = 0; state->dmaCurPhase = -1; state->dmaPrevPhase = -1; state->dmaBufIndex = 0; state->cmd = scsicmd->cmd; state->cmdlen = scsicmd->cmdlen; if ((state->buflen = scsicmd->buflen) == 0) { state->dmaDataPhase = -1; /* illegal phase. shouldn't happen */ state->buf = (char *)0; } else { state->buf = scsicmd->buf; } #ifdef DEBUG if (sii_debug > 1) { printf("sii_StartCmd: %s target %d cmd 0x%x addr %p size %d DMA %d\n", device_xname(sc->sc_dev), target, scsicmd->cmd[0], scsicmd->buf, scsicmd->buflen, state->dmaDataPhase); } sii_debug_cmd = scsicmd->cmd[0]; if (scsicmd->cmd[0] == READ_10 || scsicmd->cmd[0] == WRITE_10) { sii_debug_bn = (scsicmd->cmd[2] << 24) | (scsicmd->cmd[3] << 16) | (scsicmd->cmd[4] << 8) | scsicmd->cmd[5]; sii_debug_sz = (scsicmd->cmd[7] << 8) | scsicmd->cmd[8]; } else { sii_debug_bn = 0; sii_debug_sz = 0; } #endif /* try to select the target */ regs = sc->sc_regs; /* * Another device may have selected us; in which case, * this command will be restarted later. */ if ((status = regs->dstat) & (SII_CI | SII_DI)) { sii_DoIntr(sc, status); return; } sc->sc_target = target; #if 0 /* seem to have problems with synchronous transfers */ if (scsicmd->flags & SCSICMD_USE_SYNC) { printf("sii_StartCmd: doing extended msg\n"); /* XXX */ /* * Setup to send both the identify message and the synchronous * data transfer request. */ sii_buf[0] = MSG_IDENTIFYFLAG | MSG_IDENTIFY_DISCFLAG; sii_buf[1] = MSG_EXTENDED; sii_buf[2] = MSG_EXT_SDTR_LEN; sii_buf[3] = MSG_EXT_SDTR; sii_buf[4] = 0; sii_buf[5] = 3; /* maximum SII chip supports */ state->dmaCurPhase = SII_MSG_OUT_PHASE, state->dmalen = 6; sc->sii_copytobuf((u_short *)sii_buf, (volatile u_short *)SII_BUF_ADDR(sc), 6); regs->slcsr = target; regs->dmctrl = state->dmaReqAck; regs->dmaddrl = (u_short)(SII_BUF_ADDR(sc) >> 1); regs->dmaddrh = (u_short)(SII_BUF_ADDR(sc) >> 17) & 03; regs->dmlotc = 6; regs->comm = SII_DMA | SII_INXFER | SII_SELECT | SII_ATN | SII_CON | SII_MSG_OUT_PHASE; } else #endif { /* do a chained, select with ATN and programmed I/O command */ regs->data = MSG_IDENTIFYFLAG | MSG_IDENTIFY_DISCFLAG | scsicmd->lun; regs->slcsr = target; regs->dmctrl = state->dmaReqAck; regs->comm = SII_INXFER | SII_SELECT | SII_ATN | SII_CON | SII_MSG_OUT_PHASE; } wbflush(); /* * Wait for something to happen * (should happen soon or we would use interrupts). */ SII_WAIT_UNTIL(status, regs->cstat, status & (SII_CI | SII_DI), SII_WAIT_COUNT/4, retval); /* check to see if we are connected OK */ if ((status & (SII_RST | SII_SCH | SII_STATE_MSK)) == (SII_SCH | SII_CON)) { regs->cstat = status; wbflush(); #ifdef DEBUG sii_logp->target = target; sii_logp->cstat = status; sii_logp->dstat = 0; sii_logp->comm = regs->comm; sii_logp->msg = -1; sii_logp->rlen = state->buflen; sii_logp->dlen = state->dmalen; if (++sii_logp >= &sii_log[NLOG]) sii_logp = sii_log; #endif /* wait a short time for command phase */ SII_WAIT_UNTIL(status, regs->dstat, status & SII_MIS, SII_WAIT_COUNT, retval); #ifdef DEBUG if (sii_debug > 2) printf("sii_StartCmd: ds %x cnt %d\n", status, retval); #endif if ((status & (SII_CI | SII_MIS | SII_PHASE_MSK)) != (SII_MIS | SII_CMD_PHASE)) { printf("sii_StartCmd: timeout cs %x ds %x cnt %d\n", regs->cstat, status, retval); /* XXX */ /* process interrupt or continue until it happens */ if (status & (SII_CI | SII_DI)) sii_DoIntr(sc, status); return; } regs->dstat = SII_DNE; /* clear Msg Out DMA done */ /* send command data */ sc->sii_copytobuf((u_short *)state->cmd, (volatile u_short *)state->dmaAddr[0], state->cmdlen); sii_StartDMA(regs, state->dmaCurPhase = SII_CMD_PHASE, state->dmaAddr[0], state->dmalen = scsicmd->cmdlen); /* wait a little while for DMA to finish */ SII_WAIT_UNTIL(status, regs->dstat, status & (SII_CI | SII_DI), SII_WAIT_COUNT, retval); #ifdef DEBUG if (sii_debug > 2) printf("sii_StartCmd: ds %x, cnt %d\n", status, retval); #endif if (status & (SII_CI | SII_DI)) sii_DoIntr(sc, status); #ifdef DEBUG if (sii_debug > 2) printf("sii_StartCmd: DONE ds %x\n", regs->dstat); #endif return; } /* * Another device may have selected us; in which case, * this command will be restarted later. */ if (status & (SII_CI | SII_DI)) { sii_DoIntr(sc, regs->dstat); return; } /* * Disconnect if selection command still in progress. */ if (status & SII_SIP) { error = ENXIO; /* device didn't respond */ regs->comm = SII_DISCON; wbflush(); SII_WAIT_UNTIL(status, regs->cstat, !(status & (SII_CON | SII_SIP)), SII_WAIT_COUNT, retval); } else error = EBUSY; /* couldn't get the bus */ #ifdef DEBUG if (sii_debug > 1) printf("sii_StartCmd: Couldn't select target %d error %d\n", target, error); #endif sc->sc_target = -1; regs->cstat = 0xffff; regs->dstat = 0xffff; regs->comm = 0; wbflush(); sii_CmdDone(sc, target, error); } /* * Process interrupt conditions. */ static void sii_DoIntr(struct siisoftc *sc, u_int dstat) { SIIRegs *regs = sc->sc_regs; State *state; u_int cstat; int i, msg; u_int comm; again: comm = regs->comm; #ifdef DEBUG if (sii_debug > 3) printf("sii_DoIntr: cs %x, ds %x cm %x ", regs->cstat, dstat, comm); sii_logp->target = sc->sc_target; sii_logp->cstat = regs->cstat; sii_logp->dstat = dstat; sii_logp->comm = comm; sii_logp->msg = -1; if (sc->sc_target >= 0) { sii_logp->rlen = sc->sc_st[sc->sc_target].buflen; sii_logp->dlen = sc->sc_st[sc->sc_target].dmalen; } else { sii_logp->rlen = 0; sii_logp->dlen = 0; } if (++sii_logp >= &sii_log[NLOG]) sii_logp = sii_log; #endif regs->dstat = dstat; /* acknowledge everything */ wbflush(); if (dstat & SII_CI) { /* deglitch cstat register */ msg = regs->cstat; while (msg != (cstat = regs->cstat)) msg = cstat; regs->cstat = cstat; /* acknowledge everything */ wbflush(); #ifdef DEBUG if (sii_logp > sii_log) sii_logp[-1].cstat = cstat; else sii_log[NLOG - 1].cstat = cstat; #endif /* check for a BUS RESET */ if (cstat & SII_RST) { printf("%s: SCSI bus reset!!\n", device_xname(sc->sc_dev)); /* need to flush disconnected commands */ for (i = 0; i < SII_NCMD; i++) { if (!sc->sc_cmd[i]) continue; sii_CmdDone(sc, i, EIO); } /* rearbitrate synchronous offset */ for (i = 0; i < SII_NCMD; i++) sc->sc_st[i].dmaReqAck = 0; sc->sc_target = -1; return; } #ifdef notdef /* * Check for a BUS ERROR. * According to DEC, this feature doesn't really work * and to just clear the bit if it's set. */ if (cstat & SII_BER) { regs->cstat = SII_BER; wbflush(); } #endif /* check for state change */ if (cstat & SII_SCH) { sii_StateChg(sc, cstat); comm = regs->comm; } } /* check for DMA completion */ if (dstat & SII_DNE) { u_short *dma; char *buf; /* * There is a race condition with SII_SCH. There is a short * window between the time a SII_SCH is seen after a disconnect * and when the SII_SCH is cleared. A reselect can happen * in this window and we will clear the SII_SCH without * processing the reconnect. */ if (sc->sc_target < 0) { cstat = regs->cstat; printf("%s: target %d DNE?? dev %d,%d cs %x\n", device_xname(sc->sc_dev), sc->sc_target, regs->slcsr, regs->destat, cstat); /* XXX */ if (cstat & SII_DST) { sc->sc_target = regs->destat; state = &sc->sc_st[sc->sc_target]; state->prevComm = 0; } else panic("sc_target 1"); } state = &sc->sc_st[sc->sc_target]; /* check for a PARITY ERROR */ if (dstat & SII_IPE) { state->flags |= PARITY_ERR; printf("%s: Parity error!!\n", device_xname(sc->sc_dev)); goto abort; } /* dmalen = amount left to transfer, i = amount transfered */ i = state->dmalen; state->dmalen = 0; state->dmaCurPhase = -1; #ifdef DEBUG if (sii_debug > 4) { printf("DNE: amt %d ", i); if (!(dstat & SII_TCZ)) printf("no TCZ?? (%d) ", regs->dmlotc); } else if (!(dstat & SII_TCZ)) { printf("%s: device %d: no TCZ?? (%d)\n", device_xname(sc->sc_dev), sc->sc_target, regs->dmlotc); sii_DumpLog(); /* XXX */ } #endif switch (comm & SII_PHASE_MSK) { case SII_CMD_PHASE: state->cmdlen -= i; break; case SII_DATA_IN_PHASE: /* check for more data for the same phase */ dma = state->dmaAddr[state->dmaBufIndex]; buf = state->buf; state->buf += i; state->buflen -= i; if (state->buflen > 0 && !(dstat & SII_MIS)) { int len; /* start reading next chunk */ len = state->buflen; if (len > SII_MAX_DMA_XFER_LENGTH) len = SII_MAX_DMA_XFER_LENGTH; state->dmaBufIndex = !state->dmaBufIndex; sii_StartDMA(regs, state->dmaCurPhase = SII_DATA_IN_PHASE, state->dmaAddr[state->dmaBufIndex], state->dmaCnt = state->dmalen = len); dstat &= ~(SII_IBF | SII_TBE); } /* copy in the data */ sc->sii_copyfrombuf((volatile u_short *)dma, buf, i); break; case SII_DATA_OUT_PHASE: state->dmaBufIndex = !state->dmaBufIndex; state->buf += i; state->buflen -= i; /* check for more data for the same phase */ if (state->buflen <= 0 || (dstat & SII_MIS)) break; /* start next chunk */ i = state->buflen; if (i > SII_MAX_DMA_XFER_LENGTH) { sii_StartDMA(regs, state->dmaCurPhase = SII_DATA_OUT_PHASE, state->dmaAddr[state->dmaBufIndex], state->dmaCnt = state->dmalen = SII_MAX_DMA_XFER_LENGTH); /* prepare for next chunk */ i -= SII_MAX_DMA_XFER_LENGTH; if (i > SII_MAX_DMA_XFER_LENGTH) i = SII_MAX_DMA_XFER_LENGTH; sc->sii_copytobuf((u_short *)(state->buf + SII_MAX_DMA_XFER_LENGTH), (volatile u_short *) state->dmaAddr[!state->dmaBufIndex], i); } else { sii_StartDMA(regs, state->dmaCurPhase = SII_DATA_OUT_PHASE, state->dmaAddr[state->dmaBufIndex], state->dmaCnt = state->dmalen = i); } dstat &= ~(SII_IBF | SII_TBE); } } /* check for phase change or another MsgIn/Out */ if (dstat & (SII_MIS | SII_IBF | SII_TBE)) { /* * There is a race condition with SII_SCH. There is a short * window between the time a SII_SCH is seen after a disconnect * and when the SII_SCH is cleared. A reselect can happen * in this window and we will clear the SII_SCH without * processing the reconnect. */ if (sc->sc_target < 0) { cstat = regs->cstat; printf("%s: target %d MIS?? dev %d,%d cs %x ds %x\n", device_xname(sc->sc_dev), sc->sc_target, regs->slcsr, regs->destat, cstat, dstat); /* XXX */ if (cstat & SII_DST) { sc->sc_target = regs->destat; state = &sc->sc_st[sc->sc_target]; state->prevComm = 0; } else { #ifdef DEBUG sii_DumpLog(); #endif panic("sc_target 2"); } } state = &sc->sc_st[sc->sc_target]; switch (dstat & SII_PHASE_MSK) { case SII_CMD_PHASE: if (state->dmaPrevPhase >= 0) { /* restart DMA after disconnect/reconnect */ if (state->dmaPrevPhase != SII_CMD_PHASE) { printf("%s: device %d: DMA reselect phase doesn't match\n", device_xname(sc->sc_dev), sc->sc_target); goto abort; } state->dmaCurPhase = SII_CMD_PHASE; state->dmaPrevPhase = -1; regs->dmaddrl = state->dmaAddrL; regs->dmaddrh = state->dmaAddrH; regs->dmlotc = state->dmaCnt; if (state->dmaCnt & 1) regs->dmabyte = state->dmaByte; regs->comm = SII_DMA | SII_INXFER | (comm & SII_STATE_MSK) | SII_CMD_PHASE; wbflush(); #ifdef DEBUG if (sii_debug > 4) printf("Cmd dcnt %d dadr %x ", state->dmaCnt, (state->dmaAddrH << 16) | state->dmaAddrL); #endif } else { /* send command data */ i = state->cmdlen; if (i == 0) { printf("%s: device %d: cmd count exceeded\n", device_xname(sc->sc_dev), sc->sc_target); goto abort; } sc->sii_copytobuf((u_short *)state->cmd, (volatile u_short *)state->dmaAddr[0], i); sii_StartDMA(regs, state->dmaCurPhase = SII_CMD_PHASE, state->dmaAddr[0], state->dmaCnt = state->dmalen = i); } /* wait a short time for XFER complete */ SII_WAIT_UNTIL(dstat, regs->dstat, dstat & (SII_CI | SII_DI), SII_WAIT_COUNT, i); if (dstat & (SII_CI | SII_DI)) { #ifdef DEBUG if (sii_debug > 4) printf("cnt %d\n", i); else if (sii_debug > 0) printf("sii_DoIntr: cmd wait ds %x cnt %d\n", dstat, i); #endif goto again; } break; case SII_DATA_IN_PHASE: case SII_DATA_OUT_PHASE: if (state->cmdlen > 0) { printf("%s: device %d: cmd %x: command data not all sent (%d) 1\n", device_xname(sc->sc_dev), sc->sc_target, sc->sc_cmd[sc->sc_target]->cmd[0], state->cmdlen); state->cmdlen = 0; #ifdef DEBUG sii_DumpLog(); #endif } if (state->dmaPrevPhase >= 0) { /* restart DMA after disconnect/reconnect */ if (state->dmaPrevPhase != (dstat & SII_PHASE_MSK)) { printf("%s: device %d: DMA reselect phase doesn't match\n", device_xname(sc->sc_dev), sc->sc_target); goto abort; } state->dmaCurPhase = state->dmaPrevPhase; state->dmaPrevPhase = -1; regs->dmaddrl = state->dmaAddrL; regs->dmaddrh = state->dmaAddrH; regs->dmlotc = state->dmaCnt; if (state->dmaCnt & 1) regs->dmabyte = state->dmaByte; regs->comm = SII_DMA | SII_INXFER | (comm & SII_STATE_MSK) | state->dmaCurPhase; wbflush(); #ifdef DEBUG if (sii_debug > 4) printf("Data %d dcnt %d dadr %x ", state->dmaDataPhase, state->dmaCnt, (state->dmaAddrH << 16) | state->dmaAddrL); #endif break; } #ifdef DEBUG if (sii_debug > 4) { printf("Data %d ", state->dmaDataPhase); if (sii_debug > 5) printf("\n"); } #endif i = state->buflen; if (i == 0) { printf("%s: device %d: data count exceeded\n", device_xname(sc->sc_dev), sc->sc_target); goto abort; } if (i > SII_MAX_DMA_XFER_LENGTH) i = SII_MAX_DMA_XFER_LENGTH; if ((dstat & SII_PHASE_MSK) == SII_DATA_IN_PHASE) { sii_StartDMA(regs, state->dmaCurPhase = SII_DATA_IN_PHASE, state->dmaAddr[state->dmaBufIndex], state->dmaCnt = state->dmalen = i); break; } /* start first chunk */ if (state->flags & FIRST_DMA) { state->flags &= ~FIRST_DMA; sc->sii_copytobuf((u_short *)state->buf, (volatile u_short *) state->dmaAddr[state->dmaBufIndex], i); } sii_StartDMA(regs, state->dmaCurPhase = SII_DATA_OUT_PHASE, state->dmaAddr[state->dmaBufIndex], state->dmaCnt = state->dmalen = i); i = state->buflen - SII_MAX_DMA_XFER_LENGTH; if (i > 0) { /* prepare for next chunk */ if (i > SII_MAX_DMA_XFER_LENGTH) i = SII_MAX_DMA_XFER_LENGTH; sc->sii_copytobuf((u_short *)(state->buf + SII_MAX_DMA_XFER_LENGTH), (volatile u_short *) state->dmaAddr[!state->dmaBufIndex], i); } break; case SII_STATUS_PHASE: if (state->cmdlen > 0) { printf("%s: device %d: cmd %x: command data not all sent (%d) 2\n", device_xname(sc->sc_dev), sc->sc_target, sc->sc_cmd[sc->sc_target]->cmd[0], state->cmdlen); state->cmdlen = 0; #ifdef DEBUG sii_DumpLog(); #endif } /* read amount transfered if DMA didn't finish */ if (state->dmalen > 0) { i = state->dmalen - regs->dmlotc; state->dmalen = 0; state->dmaCurPhase = -1; regs->dmlotc = 0; regs->comm = comm & (SII_STATE_MSK | SII_PHASE_MSK); wbflush(); regs->dstat = SII_DNE; wbflush(); #ifdef DEBUG if (sii_debug > 4) printf("DMA amt %d ", i); #endif switch (comm & SII_PHASE_MSK) { case SII_DATA_IN_PHASE: /* copy in the data */ sc->sii_copyfrombuf((volatile u_short*) state->dmaAddr[state->dmaBufIndex], state->buf, i); case SII_CMD_PHASE: case SII_DATA_OUT_PHASE: state->buflen -= i; } } /* read a one byte status message */ state->statusByte = msg = sii_GetByte(regs, SII_STATUS_PHASE, 1); if (msg < 0) { dstat = regs->dstat; goto again; } #ifdef DEBUG if (sii_debug > 4) printf("Status %x ", msg); if (sii_logp > sii_log) sii_logp[-1].msg = msg; else sii_log[NLOG - 1].msg = msg; #endif /* do a quick wait for COMMAND_COMPLETE */ SII_WAIT_UNTIL(dstat, regs->dstat, dstat & (SII_CI | SII_DI), SII_WAIT_COUNT, i); if (dstat & (SII_CI | SII_DI)) { #ifdef DEBUG if (sii_debug > 4) printf("cnt2 %d\n", i); #endif goto again; } break; case SII_MSG_IN_PHASE: /* * Save DMA state if DMA didn't finish. * Be careful not to save state again after reconnect * and see RESTORE_POINTER message. * Note that the SII DMA address is not incremented * as DMA proceeds. */ if (state->dmaCurPhase >= 0) { /* save DMA registers */ state->dmaPrevPhase = state->dmaCurPhase; state->dmaCurPhase = -1; if (dstat & SII_OBB) state->dmaByte = regs->dmabyte; i = regs->dmlotc; if (i != 0) i = state->dmaCnt - i; /* note: no carry from dmaddrl to dmaddrh */ state->dmaAddrL = regs->dmaddrl + i; state->dmaAddrH = regs->dmaddrh; state->dmaCnt = regs->dmlotc; if (state->dmaCnt == 0) state->dmaCnt = SII_MAX_DMA_XFER_LENGTH; regs->comm = comm & (SII_STATE_MSK | SII_PHASE_MSK); wbflush(); regs->dstat = SII_DNE; wbflush(); #ifdef DEBUG if (sii_debug > 4) { printf("SavP dcnt %d dadr %x ", state->dmaCnt, (state->dmaAddrH << 16) | state->dmaAddrL); if (((dstat & SII_OBB) != 0) ^ (state->dmaCnt & 1)) printf("OBB??? "); } else if (sii_debug > 0) { if (((dstat & SII_OBB) != 0) ^ (state->dmaCnt & 1)) { printf("sii_DoIntr: OBB??? ds %x cnt %d\n", dstat, state->dmaCnt); sii_DumpLog(); } } #endif } /* read a one byte message */ msg = sii_GetByte(regs, SII_MSG_IN_PHASE, 0); if (msg < 0) { dstat = regs->dstat; goto again; } #ifdef DEBUG if (sii_debug > 4) printf("MsgIn %x ", msg); if (sii_logp > sii_log) sii_logp[-1].msg = msg; else sii_log[NLOG - 1].msg = msg; #endif /* process message */ switch (msg) { case MSG_CMDCOMPLETE: /* acknowledge last byte */ regs->comm = SII_INXFER | SII_MSG_IN_PHASE | (comm & SII_STATE_MSK); SII_WAIT_UNTIL(dstat, regs->dstat, dstat & SII_DNE, SII_WAIT_COUNT, i); regs->dstat = SII_DNE; wbflush(); msg = sc->sc_target; sc->sc_target = -1; /* * Wait a short time for disconnect. * Don't be fooled if SII_BER happens first. * Note: a reselect may happen here. */ SII_WAIT_UNTIL(cstat, regs->cstat, cstat & (SII_RST | SII_SCH), SII_WAIT_COUNT, i); if ((cstat & (SII_RST | SII_SCH | SII_STATE_MSK)) == SII_SCH) { regs->cstat = SII_SCH | SII_BER; regs->comm = 0; wbflush(); /* * Double check that we didn't miss a * state change between seeing it and * clearing the SII_SCH bit. */ i = regs->cstat; if (!(i & SII_SCH) && (i & SII_STATE_MSK) != (cstat & SII_STATE_MSK)) sii_StateChg(sc, i); } #ifdef DEBUG if (sii_debug > 4) printf("cs %x\n", cstat); #endif sii_CmdDone(sc, msg, 0); break; case MSG_EXTENDED: /* acknowledge last byte */ regs->comm = SII_INXFER | SII_MSG_IN_PHASE | (comm & SII_STATE_MSK); SII_WAIT_UNTIL(dstat, regs->dstat, dstat & SII_DNE, SII_WAIT_COUNT, i); regs->dstat = SII_DNE; wbflush(); /* read the message length */ msg = sii_GetByte(regs, SII_MSG_IN_PHASE, 1); if (msg < 0) { dstat = regs->dstat; goto again; } sii_buf[1] = msg; /* message length */ if (msg == 0) msg = 256; /* * We read and acknowledge all the bytes * except the last so we can assert ATN * if needed before acknowledging the last. */ for (i = 0; i < msg; i++) { dstat = sii_GetByte(regs, SII_MSG_IN_PHASE, i < msg - 1); if ((int)dstat < 0) { dstat = regs->dstat; goto again; } sii_buf[i + 2] = dstat; } switch (sii_buf[2]) { case MSG_EXT_MODIFY_DATA_PTR: /* acknowledge last byte */ regs->comm = SII_INXFER | SII_MSG_IN_PHASE | (comm & SII_STATE_MSK); SII_WAIT_UNTIL(dstat, regs->dstat, dstat & SII_DNE, SII_WAIT_COUNT, i); regs->dstat = SII_DNE; wbflush(); i = (sii_buf[3] << 24) | (sii_buf[4] << 16) | (sii_buf[5] << 8) | sii_buf[6]; if (state->dmaPrevPhase >= 0) { state->dmaAddrL += i; state->dmaCnt -= i; } break; case MSG_EXT_SDTR_LEN: /* * Acknowledge last byte and * signal a request for MSG_OUT. */ regs->comm = SII_INXFER | SII_ATN | SII_MSG_IN_PHASE | (comm & SII_STATE_MSK); SII_WAIT_UNTIL(dstat, regs->dstat, dstat & SII_DNE, SII_WAIT_COUNT, i); regs->dstat = SII_DNE; wbflush(); sii_DoSync(regs, state); break; default: reject: /* * Acknowledge last byte and * signal a request for MSG_OUT. */ regs->comm = SII_INXFER | SII_ATN | SII_MSG_IN_PHASE | (comm & SII_STATE_MSK); SII_WAIT_UNTIL(dstat, regs->dstat, dstat & SII_DNE, SII_WAIT_COUNT, i); regs->dstat = SII_DNE; wbflush(); /* wait for MSG_OUT phase */ SII_WAIT_UNTIL(dstat, regs->dstat, dstat & SII_TBE, SII_WAIT_COUNT, i); /* send a reject message */ regs->data = MSG_MESSAGE_REJECT; regs->comm = SII_INXFER | (regs->cstat & SII_STATE_MSK) | SII_MSG_OUT_PHASE; SII_WAIT_UNTIL(dstat, regs->dstat, dstat & SII_DNE, SII_WAIT_COUNT, i); regs->dstat = SII_DNE; wbflush(); } break; case MSG_SAVEDATAPOINTER: case MSG_RESTOREPOINTERS: /* acknowledge last byte */ regs->comm = SII_INXFER | SII_MSG_IN_PHASE | (comm & SII_STATE_MSK); SII_WAIT_UNTIL(dstat, regs->dstat, dstat & SII_DNE, SII_WAIT_COUNT, i); regs->dstat = SII_DNE; wbflush(); /* wait a short time for another msg */ SII_WAIT_UNTIL(dstat, regs->dstat, dstat & (SII_CI | SII_DI), SII_WAIT_COUNT, i); if (dstat & (SII_CI | SII_DI)) { #ifdef DEBUG if (sii_debug > 4) printf("cnt %d\n", i); #endif goto again; } break; case MSG_DISCONNECT: /* acknowledge last byte */ regs->comm = SII_INXFER | SII_MSG_IN_PHASE | (comm & SII_STATE_MSK); SII_WAIT_UNTIL(dstat, regs->dstat, dstat & SII_DNE, SII_WAIT_COUNT, i); regs->dstat = SII_DNE; wbflush(); state->prevComm = comm; #ifdef DEBUG if (sii_debug > 4) printf("disconn %d ", sc->sc_target); #endif /* * Wait a short time for disconnect. * Don't be fooled if SII_BER happens first. * Note: a reselect may happen here. */ SII_WAIT_UNTIL(cstat, regs->cstat, cstat & (SII_RST | SII_SCH), SII_WAIT_COUNT, i); if ((cstat & (SII_RST | SII_SCH | SII_STATE_MSK)) != SII_SCH) { #ifdef DEBUG if (sii_debug > 4) printf("cnt %d\n", i); #endif dstat = regs->dstat; goto again; } regs->cstat = SII_SCH | SII_BER; regs->comm = 0; wbflush(); sc->sc_target = -1; /* * Double check that we didn't miss a state * change between seeing it and clearing * the SII_SCH bit. */ i = regs->cstat; if (!(i & SII_SCH) && (i & SII_STATE_MSK) != (cstat & SII_STATE_MSK)) sii_StateChg(sc, i); break; case MSG_MESSAGE_REJECT: /* acknowledge last byte */ regs->comm = SII_INXFER | SII_MSG_IN_PHASE | (comm & SII_STATE_MSK); SII_WAIT_UNTIL(dstat, regs->dstat, dstat & SII_DNE, SII_WAIT_COUNT, i); regs->dstat = SII_DNE; wbflush(); printf("%s: device %d: message reject.\n", device_xname(sc->sc_dev), sc->sc_target); break; default: if (!(msg & MSG_IDENTIFYFLAG)) { printf("%s: device %d: couldn't handle " "message 0x%x... rejecting.\n", device_xname(sc->sc_dev), sc->sc_target, msg); #ifdef DEBUG sii_DumpLog(); #endif goto reject; } /* acknowledge last byte */ regs->comm = SII_INXFER | SII_MSG_IN_PHASE | (comm & SII_STATE_MSK); SII_WAIT_UNTIL(dstat, regs->dstat, dstat & SII_DNE, SII_WAIT_COUNT, i); regs->dstat = SII_DNE; wbflush(); /* may want to check LUN some day */ /* wait a short time for another msg */ SII_WAIT_UNTIL(dstat, regs->dstat, dstat & (SII_CI | SII_DI), SII_WAIT_COUNT, i); if (dstat & (SII_CI | SII_DI)) { #ifdef DEBUG if (sii_debug > 4) printf("cnt %d\n", i); #endif goto again; } } break; case SII_MSG_OUT_PHASE: #ifdef DEBUG if (sii_debug > 4) printf("MsgOut\n"); #endif printf("MsgOut %x\n", state->flags); /* XXX */ /* * Check for parity error. * Hardware will automatically set ATN * to request the device for a MSG_OUT phase. */ if (state->flags & PARITY_ERR) { state->flags &= ~PARITY_ERR; regs->data = MSG_PARITY_ERROR; } else regs->data = MSG_NOOP; regs->comm = SII_INXFER | (comm & SII_STATE_MSK) | SII_MSG_OUT_PHASE; wbflush(); /* wait a short time for XFER complete */ SII_WAIT_UNTIL(dstat, regs->dstat, dstat & SII_DNE, SII_WAIT_COUNT, i); #ifdef DEBUG if (sii_debug > 4) printf("ds %x i %d\n", dstat, i); #endif /* just clear the DNE bit and check errors later */ if (dstat & SII_DNE) { regs->dstat = SII_DNE; wbflush(); } break; default: printf("%s: Couldn't handle phase %d... ignoring.\n", device_xname(sc->sc_dev), dstat & SII_PHASE_MSK); } } #ifdef DEBUG if (sii_debug > 3) printf("\n"); #endif /* * Check to make sure we won't be interrupted again. * Deglitch dstat register. */ msg = regs->dstat; while (msg != (dstat = regs->dstat)) msg = dstat; if (dstat & (SII_CI | SII_DI)) goto again; if (sc->sc_target < 0) { /* look for another device that is ready */ for (i = 0; i < SII_NCMD; i++) { /* don't restart a disconnected command */ if (!sc->sc_cmd[i] || sc->sc_st[i].prevComm) continue; sii_StartCmd(sc, i); break; } } return; abort: /* jump here to abort the current command */ printf("%s: device %d: current command terminated\n", device_xname(sc->sc_dev), sc->sc_target); #ifdef DEBUG sii_DumpLog(); #endif if ((cstat = regs->cstat) & SII_CON) { /* try to send an abort msg for awhile */ regs->dstat = SII_DNE; regs->data = MSG_ABORT; regs->comm = SII_INXFER | SII_ATN | (cstat & SII_STATE_MSK) | SII_MSG_OUT_PHASE; wbflush(); SII_WAIT_UNTIL(dstat, regs->dstat, (dstat & (SII_DNE | SII_PHASE_MSK)) == (SII_DNE | SII_MSG_OUT_PHASE), 2 * SII_WAIT_COUNT, i); #ifdef DEBUG if (sii_debug > 0) printf("Abort: cs %x ds %x i %d\n", cstat, dstat, i); #endif if ((dstat & (SII_DNE | SII_PHASE_MSK)) == (SII_DNE | SII_MSG_OUT_PHASE)) { /* disconnect if command in progress */ regs->comm = SII_DISCON; wbflush(); SII_WAIT_UNTIL(cstat, regs->cstat, !(cstat & SII_CON), SII_WAIT_COUNT, i); } } else { #ifdef DEBUG if (sii_debug > 0) printf("Abort: cs %x\n", cstat); #endif } regs->cstat = 0xffff; regs->dstat = 0xffff; regs->comm = 0; wbflush(); i = sc->sc_target; sc->sc_target = -1; sii_CmdDone(sc, i, EIO); #ifdef DEBUG if (sii_debug > 4) printf("sii_DoIntr: after CmdDone target %d\n", sc->sc_target); #endif } static void sii_StateChg(struct siisoftc *sc, u_int cstat) { SIIRegs *regs = sc->sc_regs; State *state; int i; #ifdef DEBUG if (sii_debug > 4) printf("SCH: "); #endif switch (cstat & SII_STATE_MSK) { case 0: /* disconnect */ i = sc->sc_target; sc->sc_target = -1; #ifdef DEBUG if (sii_debug > 4) printf("disconn %d ", i); #endif if (i >= 0 && !sc->sc_st[i].prevComm) { printf("%s: device %d: spurrious disconnect (%d)\n", device_xname(sc->sc_dev), i, regs->slcsr); sc->sc_st[i].prevComm = 0; } break; case SII_CON: /* connected as initiator */ i = regs->slcsr; if (sc->sc_target == i) break; printf("%s: device %d: connect to device %d??\n", device_xname(sc->sc_dev), sc->sc_target, i); sc->sc_target = i; break; case SII_DST: /* * Wait for CON to become valid, * chip is slow sometimes. */ SII_WAIT_UNTIL(cstat, regs->cstat, cstat & SII_CON, SII_WAIT_COUNT, i); if (!(cstat & SII_CON)) panic("sii resel"); /* FALLTHROUGH */ case SII_CON | SII_DST: /* * Its a reselection. Save the ID and wait for * interrupts to tell us what to do next * (should be MSG_IN of IDENTIFY). * NOTE: sc_target may be >= 0 if we were in * the process of trying to start a command * and were reselected before the select * command finished. */ sc->sc_target = i = regs->destat; state = &sc->sc_st[i]; regs->comm = SII_CON | SII_DST | SII_MSG_IN_PHASE; regs->dmctrl = state->dmaReqAck; wbflush(); if (!state->prevComm) { printf("%s: device %d: spurious reselection\n", device_xname(sc->sc_dev), i); break; } state->prevComm = 0; #ifdef DEBUG if (sii_debug > 4) printf("resel %d ", sc->sc_target); #endif break; #ifdef notyet case SII_DST | SII_TGT: case SII_CON | SII_DST | SII_TGT: /* connected as target */ printf("%s: Selected by device %d as target!!\n", device_xname(sc->sc_dev), regs->destat); regs->comm = SII_DISCON; wbflush(); SII_WAIT_UNTIL(!(regs->cstat & SII_CON), SII_WAIT_COUNT, i); regs->cstat = 0xffff; regs->dstat = 0xffff; regs->comm = 0; break; #endif default: printf("%s: Unknown state change (cs %x)!!\n", device_xname(sc->sc_dev), cstat); #ifdef DEBUG sii_DumpLog(); #endif } } /* * Read one byte of data. * If 'ack' is true, acknowledge the byte. */ static int sii_GetByte(SIIRegs *regs, int phase, int ack) { u_int dstat; u_int state; int i; int data; dstat = regs->dstat; state = regs->cstat & SII_STATE_MSK; i = -1; if (!(dstat & SII_IBF) || (dstat & SII_MIS)) { regs->comm = state | phase; wbflush(); /* wait a short time for IBF */ SII_WAIT_UNTIL(dstat, regs->dstat, dstat & SII_IBF, SII_WAIT_COUNT, i); #ifdef DEBUG if (!(dstat & SII_IBF)) printf("status no IBF\n"); #endif } if (dstat & SII_DNE) { /* XXX */ printf("sii_GetByte: DNE set 5\n"); #ifdef DEBUG sii_DumpLog(); #endif regs->dstat = SII_DNE; } data = regs->data; /* check for parity error */ if (dstat & SII_IPE) { #ifdef DEBUG if (sii_debug > 4) printf("cnt0 %d\n", i); #endif printf("sii_GetByte: data %x ?? ds %x cm %x i %d\n", data, dstat, regs->comm, i); /* XXX */ data = -1; ack = 1; } if (ack) { regs->comm = SII_INXFER | state | phase; wbflush(); /* wait a short time for XFER complete */ SII_WAIT_UNTIL(dstat, regs->dstat, dstat & SII_DNE, SII_WAIT_COUNT, i); /* clear the DNE */ if (dstat & SII_DNE) { regs->dstat = SII_DNE; wbflush(); } } return (data); } /* * Exchange messages to initiate synchronous data transfers. */ static void sii_DoSync(SIIRegs *regs, State *state) { u_int dstat, comm; int i, j; u_int len; #ifdef DEBUG if (sii_debug) printf("sii_DoSync: len %d per %d req/ack %d\n", sii_buf[1], sii_buf[3], sii_buf[4]); #endif /* SII chip can only handle a minimum transfer period of ??? */ if (sii_buf[3] < 64) sii_buf[3] = 64; /* SII chip can only handle a maximum REQ/ACK offset of 3 */ len = sii_buf[4]; if (len > 3) len = 3; sii_buf[0] = MSG_EXTENDED; sii_buf[1] = MSG_EXT_SDTR_LEN; sii_buf[2] = MSG_EXT_SDTR; sii_buf[4] = len; #if 1 comm = SII_INXFER | SII_ATN | SII_MSG_OUT_PHASE | (regs->cstat & SII_STATE_MSK); regs->comm = comm & ~SII_INXFER; for (j = 0; j < 5; j++) { /* wait for target to request the next byte */ SII_WAIT_UNTIL(dstat, regs->dstat, dstat & SII_TBE, SII_WAIT_COUNT, i); if (!(dstat & SII_TBE) || (dstat & SII_PHASE_MSK) != SII_MSG_OUT_PHASE) { printf("sii_DoSync: TBE? ds %x cm %x i %d\n", dstat, comm, i); /* XXX */ return; } /* the last message byte should have ATN off */ if (j == 4) comm &= ~SII_ATN; regs->data = sii_buf[j]; regs->comm = comm; wbflush(); /* wait a short time for XFER complete */ SII_WAIT_UNTIL(dstat, regs->dstat, dstat & SII_DNE, SII_WAIT_COUNT, i); if (!(dstat & SII_DNE)) { printf("sii_DoSync: DNE? ds %x cm %x i %d\n", dstat, comm, i); /* XXX */ return; } /* clear the DNE, other errors handled later */ regs->dstat = SII_DNE; wbflush(); } #else /* 0 */ sc->sii_copytobuf((u_short *)sii_buf, (volatile u_short *)SII_BUF_ADDR(sc), 5); printf("sii_DoSync: %x %x %x ds %x\n", ((volatile u_short *)SII_BUF_ADDR(sc))[0], ((volatile u_short *)SII_BUF_ADDR(sc))[2], ((volatile u_short *)SII_BUF_ADDR(sc))[4], regs->dstat); /* XXX */ regs->dmaddrl = (u_short)(SII_BUF_ADDR(sc) >> 1); regs->dmaddrh = (u_short)(SII_BUF_ADDR(sc) >> 17) & 03; regs->dmlotc = 5; regs->comm = SII_DMA | SII_INXFER | SII_ATN | (regs->cstat & SII_STATE_MSK) | SII_MSG_OUT_PHASE; wbflush(); /* wait a short time for XFER complete */ SII_WAIT_UNTIL(dstat, regs->dstat, (dstat & (SII_DNE | SII_TCZ)) == (SII_DNE | SII_TCZ), SII_WAIT_COUNT, i); if ((dstat & (SII_DNE | SII_TCZ)) != (SII_DNE | SII_TCZ)) { printf("sii_DoSync: ds %x cm %x i %d lotc %d\n", dstat, regs->comm, i, regs->dmlotc); /* XXX */ sii_DumpLog(); /* XXX */ return; } /* clear the DNE, other errors handled later */ regs->dstat = SII_DNE; wbflush(); #endif /* 0 */ #if 0 SII_WAIT_UNTIL(dstat, regs->dstat, dstat & (SII_CI | SII_DI), SII_WAIT_COUNT, i); printf("sii_DoSync: ds %x cm %x i %d lotc %d\n", dstat, regs->comm, i, regs->dmlotc); /* XXX */ #endif state->dmaReqAck = len; } /* * Issue the sequence of commands to the controller to start DMA. * NOTE: the data buffer should be word-aligned for DMA out. */ static void sii_StartDMA(SIIRegs *regs, int phase, u_short *dmaAddr, int size) /* regs: which SII to use */ /* phase: phase to send/receive data */ /* dmaAddr: DMA buffer address */ /* size: # of bytes to transfer */ { if (regs->dstat & SII_DNE) { /* XXX */ regs->dstat = SII_DNE; printf("sii_StartDMA: DNE set\n"); #ifdef DEBUG sii_DumpLog(); #endif } regs->dmaddrl = ((u_long)dmaAddr >> 1); regs->dmaddrh = ((u_long)dmaAddr >> 17) & 03; regs->dmlotc = size; regs->comm = SII_DMA | SII_INXFER | (regs->cstat & SII_STATE_MSK) | phase; wbflush(); #ifdef DEBUG if (sii_debug > 5) { printf("sii_StartDMA: cs 0x%x, ds 0x%x, cm 0x%x, size %d\n", regs->cstat, regs->dstat, regs->comm, size); } #endif } /* * Call the device driver's 'done' routine to let it know the command is done. * The 'done' routine may try to start another command. * To be fair, we should start pending commands for other devices * before allowing the same device to start another command. */ static void sii_CmdDone(struct siisoftc *sc, int target, int error) /* sc: which SII to use */ /* target: which device is done */ /* error: error code if any errors */ { int i; ScsiCmd *scsicmd __unused = sc->sc_cmd[target]; KASSERTMSG(target >= 0 && scsicmd, "sii_CmdDone"); sc->sc_cmd[target] = (ScsiCmd *)0; #ifdef DEBUG if (sii_debug > 1) { printf("sii_CmdDone: %s target %d cmd %x err %d resid %d\n", device_xname(sc->sc_dev), target, scsicmd->cmd[0], error, sc->sc_st[target].buflen); } #endif /* look for another device that is ready */ for (i = 0; i < SII_NCMD; i++) { /* don't restart a disconnected command */ if (!sc->sc_cmd[i] || sc->sc_st[i].prevComm) continue; sii_StartCmd(sc, i); break; } sc->sc_xs[target]->status = sc->sc_st[target].statusByte; /* * Convert SII driver error code to MI SCSI XS_*. */ switch (error) { case 0: sc->sc_xs[target]->error = XS_NOERROR; break; case ENXIO: sc->sc_xs[target]->error = XS_SELTIMEOUT; break; case EBUSY: sc->sc_xs[target]->error = XS_BUSY; break; case EIO: sc->sc_xs[target]->error = XS_DRIVER_STUFFUP; break; default: sc->sc_xs[target]->error = XS_DRIVER_STUFFUP; } sc->sc_xs[target]->resid = sc->sc_st[target].buflen; scsipi_done(sc->sc_xs[target]); } #ifdef DEBUG static void sii_DumpLog(void) { struct sii_log *lp; printf("sii: cmd %x bn %d cnt %d\n", sii_debug_cmd, sii_debug_bn, sii_debug_sz); lp = sii_logp; do { printf("target %d cs %x ds %x cm %x msg %x rlen %x dlen %x\n", lp->target, lp->cstat, lp->dstat, lp->comm, lp->msg, lp->rlen, lp->dlen); if (++lp >= &sii_log[NLOG]) lp = sii_log; } while (lp != sii_logp); } #endif