/* * Copyright (c) 1994 Michael L. Hitch * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * Van Jacobson of Lawrence Berkeley Laboratory. * * 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 the University of * California, Berkeley and its contributors. * 4. 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. * * @(#)siop.c 7.5 (Berkeley) 5/4/91 * $Id: siop.c,v 1.16 1994/07/18 08:06:40 chopps Exp $ */ /* * AMIGA 53C710 scsi adaptor driver */ /* need to know if any tapes have been configured */ #include "st.h" #include #include #include #include #include #include #include #include #include #include extern u_int kvtop(); /* * SCSI delays * In u-seconds, primarily for state changes on the SPC. */ #define SCSI_CMD_WAIT 500000 /* wait per step of 'immediate' cmds */ #define SCSI_DATA_WAIT 500000 /* wait per data in/out step */ #define SCSI_INIT_WAIT 500000 /* wait per step (both) during init */ int siopicmd __P((struct siop_softc *, int, void *, int, void *, int)); int siopgo __P((struct siop_softc *, struct scsi_xfer *)); int siopgetsense __P((struct siop_softc *, struct scsi_xfer *)); void siopabort __P((struct siop_softc *, siop_regmap_p, char *)); void sioperror __P((struct siop_softc *, siop_regmap_p, u_char)); void siopstart __P((struct siop_softc *)); void siopreset __P((struct siop_softc *)); void siopsetdelay __P((int)); void siop_scsidone __P((struct siop_softc *, int)); void siop_donextcmd __P((struct siop_softc *)); int siopintr __P((struct siop_softc *)); /* 53C710 script */ unsigned long scripts[] = { 0x47000000, 0x000002d0, /* 000 - 0 */ 0x838b0000, 0x000000d0, /* 008 - 8 */ 0x7a1b1000, 0x00000000, /* 010 - 16 */ 0x828a0000, 0x00000088, /* 018 - 24 */ 0x9e020000, 0x0000ff01, /* 020 - 32 */ 0x72350000, 0x00000000, /* 028 - 40 */ 0x808c0000, 0x00000048, /* 030 - 48 */ 0x58000008, 0x00000000, /* 038 - 56 */ 0x1e000024, 0x00000024, /* 040 - 64 */ 0x838b0000, 0x00000090, /* 048 - 72 */ 0x1f00002c, 0x0000002c, /* 050 - 80 */ 0x838b0000, 0x00000080, /* 058 - 88 */ 0x868a0000, 0xffffffd0, /* 060 - 96 */ 0x838a0000, 0x00000070, /* 068 - 104 */ 0x878a0000, 0x00000158, /* 070 - 112 */ 0x80880000, 0x00000028, /* 078 - 120 */ 0x1e000004, 0x00000004, /* 080 - 128 */ 0x838b0000, 0x00000050, /* 088 - 136 */ 0x868a0000, 0xffffffe8, /* 090 - 144 */ 0x838a0000, 0x00000040, /* 098 - 152 */ 0x878a0000, 0x00000128, /* 0a0 - 160 */ 0x9a020000, 0x0000ff02, /* 0a8 - 168 */ 0x1a00000c, 0x0000000c, /* 0b0 - 176 */ 0x878b0000, 0x00000168, /* 0b8 - 184 */ 0x838a0000, 0x00000018, /* 0c0 - 192 */ 0x818a0000, 0x000000e8, /* 0c8 - 200 */ 0x808a0000, 0x000000b8, /* 0d0 - 208 */ 0x98080000, 0x0000ff03, /* 0d8 - 216 */ 0x1b000014, 0x00000014, /* 0e0 - 224 */ 0x72090000, 0x00000000, /* 0e8 - 232 */ 0x6a340000, 0x00000000, /* 0f0 - 240 */ 0x9f030000, 0x0000ff04, /* 0f8 - 248 */ 0x1f00001c, 0x0000001c, /* 100 - 256 */ 0x808c0007, 0x00000050, /* 108 - 264 */ 0x98040000, 0x0000ff26, /* 110 - 272 */ 0x60000040, 0x00000000, /* 118 - 280 */ 0x48000000, 0x00000000, /* 120 - 288 */ 0x7c1bef00, 0x00000000, /* 128 - 296 */ 0x72340000, 0x00000000, /* 130 - 304 */ 0x980c0002, 0x0000fffc, /* 138 - 312 */ 0x980c0008, 0x0000fffb, /* 140 - 320 */ 0x980c0018, 0x0000fffd, /* 148 - 328 */ 0x98040000, 0x0000fffe, /* 150 - 336 */ 0x98080000, 0x0000ff00, /* 158 - 344 */ 0x60000008, 0x00000000, /* 160 - 352 */ 0x98080000, 0x0000ff26, /* 168 - 360 */ 0x60000040, 0x00000000, /* 170 - 368 */ 0x828b0000, 0xffffff28, /* 178 - 376 */ 0x838b0000, 0xffffff58, /* 180 - 384 */ 0x878b0000, 0xffffff68, /* 188 - 392 */ 0x18000034, 0x00000034, /* 190 - 400 */ 0x808b0000, 0x000001c0, /* 198 - 408 */ 0x838b0000, 0xffffff38, /* 1a0 - 416 */ 0x878a0000, 0x000000d0, /* 1a8 - 424 */ 0x98080000, 0x0000ff05, /* 1b0 - 432 */ 0x19000034, 0x00000034, /* 1b8 - 440 */ 0x818b0000, 0x00000160, /* 1c0 - 448 */ 0x80880000, 0xffffffd0, /* 1c8 - 456 */ 0x1f00001c, 0x0000001c, /* 1d0 - 464 */ 0x808c0001, 0x00000018, /* 1d8 - 472 */ 0x980c0002, 0x0000ff08, /* 1e0 - 480 */ 0x808c0004, 0x00000020, /* 1e8 - 488 */ 0x98080000, 0x0000ff06, /* 1f0 - 496 */ 0x60000040, 0x00000000, /* 1f8 - 504 */ 0x1f00002c, 0x0000002c, /* 200 - 512 */ 0x98080000, 0x0000ff07, /* 208 - 520 */ 0x60000040, 0x00000000, /* 210 - 528 */ 0x48000000, 0x00000000, /* 218 - 536 */ 0x98080000, 0x0000ff09, /* 220 - 544 */ 0x1f00001c, 0x0000001c, /* 228 - 552 */ 0x808c0001, 0x00000018, /* 230 - 560 */ 0x980c0002, 0x0000ff10, /* 238 - 568 */ 0x808c0004, 0x00000020, /* 240 - 576 */ 0x98080000, 0x0000ff11, /* 248 - 584 */ 0x60000040, 0x00000000, /* 250 - 592 */ 0x1f00002c, 0x0000002c, /* 258 - 600 */ 0x98080000, 0x0000ff12, /* 260 - 608 */ 0x60000040, 0x00000000, /* 268 - 616 */ 0x48000000, 0x00000000, /* 270 - 624 */ 0x98080000, 0x0000ff13, /* 278 - 632 */ 0x1f00001c, 0x0000001c, /* 280 - 640 */ 0x808c0001, 0x00000018, /* 288 - 648 */ 0x980c0002, 0x0000ff14, /* 290 - 656 */ 0x808c0004, 0x00000020, /* 298 - 664 */ 0x98080000, 0x0000ff15, /* 2a0 - 672 */ 0x60000040, 0x00000000, /* 2a8 - 680 */ 0x1f00002c, 0x0000002c, /* 2b0 - 688 */ 0x98080000, 0x0000ff16, /* 2b8 - 696 */ 0x60000040, 0x00000000, /* 2c0 - 704 */ 0x48000000, 0x00000000, /* 2c8 - 712 */ 0x98080000, 0x0000ff17, /* 2d0 - 720 */ 0x54000000, 0x00000040, /* 2d8 - 728 */ 0x9f030000, 0x0000ff18, /* 2e0 - 736 */ 0x1f00001c, 0x0000001c, /* 2e8 - 744 */ 0x990b0000, 0x0000ff19, /* 2f0 - 752 */ 0x980a0000, 0x0000ff20, /* 2f8 - 760 */ 0x9f0a0000, 0x0000ff21, /* 300 - 768 */ 0x9b0a0000, 0x0000ff22, /* 308 - 776 */ 0x9e0a0000, 0x0000ff23, /* 310 - 784 */ 0x98080000, 0x0000ff24, /* 318 - 792 */ 0x98080000, 0x0000ff25, /* 320 - 800 */ 0x76100800, 0x00000000, /* 328 - 808 */ 0x80840700, 0x00000008, /* 330 - 816 */ 0x7e110100, 0x00000000, /* 338 - 824 */ 0x6a100000, 0x00000000, /* 340 - 832 */ 0x19000034, 0x00000034, /* 348 - 840 */ 0x818b0000, 0xffffffd0, /* 350 - 848 */ 0x98080000, 0x0000ff27, /* 358 - 856 */ 0x76100800, 0x00000000, /* 360 - 864 */ 0x80840700, 0x00000008, /* 368 - 872 */ 0x7e110100, 0x00000000, /* 370 - 880 */ 0x6a100000, 0x00000000, /* 378 - 888 */ 0x18000034, 0x00000034, /* 380 - 896 */ 0x808b0000, 0xffffffd0, /* 388 - 904 */ 0x98080000, 0x0000ff27 /* 390 - 912 */ }; #define Ent_msgout 0x00000018 #define Ent_cmd 0x000000a8 #define Ent_status 0x000000e0 #define Ent_msgin 0x000000f8 #define Ent_dataout 0x00000190 #define Ent_datain 0x000001b8 /* default to not inhibit sync negotiation on any drive */ /* XXXX - unit 2 inhibits sync for my WangTek tape drive - mlh */ u_char siop_inhibit_sync[8] = { 0, 0, 0, 0, 0, 0, 0 }; /* initialize, so patchable */ int siop_no_dma = 0; int siop_reset_delay = 2000; /* delay after reset, in milleseconds */ int siop_sync_period = 50; /* synchronous transfer period, in nanoseconds */ int siop_cmd_wait = SCSI_CMD_WAIT; int siop_data_wait = SCSI_DATA_WAIT; int siop_init_wait = SCSI_INIT_WAIT; static struct { unsigned char x; /* period from sync request message */ unsigned char y; /* siop_period << 4 | sbcl */ } xxx[] = { {0x0f, 0x01}, {0x13, 0x11}, {0x17, 0x21}, /* {0x17, 0x02}, */ {0x1b, 0x31}, {0x1d, 0x12}, {0x1e, 0x41}, /* {0x1e, 0x03}, */ {0x22, 0x51}, {0x23, 0x22}, {0x26, 0x61}, /* {0x26, 0x13}, */ {0x29, 0x32}, {0x2a, 0x71}, {0x2d, 0x23}, {0x2e, 0x42}, {0x34, 0x52}, {0x35, 0x33}, {0x3a, 0x62}, {0x3c, 0x43}, {0x40, 0x72}, {0x44, 0x53}, {0x4b, 0x63}, {0x53, 0x73} }; #ifdef DEBUG #define QPRINTF(a) if (siop_debug > 1) printf a /* * 0x01 - full debug * 0x02 - DMA chaining * 0x04 - siopintr * 0x08 - phase mismatch * 0x10 - panic on phase mismatch * 0x20 - panic on unhandled exceptions */ int siop_debug = 0; int siopsync_debug = 0; int siopdma_hits = 0; int siopdma_misses = 0; int siopchain_ints = 0; #else #define QPRINTF(a) #endif /* * default minphys routine for siop based controllers */ void siop_minphys(bp) struct buf *bp; { /* * no max transfer at this level */ } /* * must be used */ u_int siop_adinfo() { /* * one request at a time please */ return(1); } /* * used by specific siop controller * * it appears that the higher level code does nothing with LUN's * so I will too. I could plug it in, however so could they * in scsi_scsi_cmd(). */ int siop_scsicmd(xs) struct scsi_xfer *xs; { struct siop_pending *pendp; struct siop_softc *dev; struct scsi_link *slp; int flags, s; slp = xs->sc_link; dev = slp->adapter_softc; flags = xs->flags; if (flags & SCSI_DATA_UIO) panic("siop: scsi data uio requested"); if (dev->sc_xs && flags & SCSI_NOMASK) panic("siop_scsicmd: busy"); s = splbio(); pendp = &dev->sc_xsstore[slp->target][slp->lun]; if (pendp->xs) { splx(s); return(TRY_AGAIN_LATER); } if (dev->sc_xs) { pendp->xs = xs; TAILQ_INSERT_TAIL(&dev->sc_xslist, pendp, link); splx(s); return(SUCCESSFULLY_QUEUED); } pendp->xs = NULL; dev->sc_xs = xs; splx(s); /* * nothing is pending do it now. */ siop_donextcmd(dev); if (flags & SCSI_NOMASK) return(COMPLETE); return(SUCCESSFULLY_QUEUED); } /* * entered with dev->sc_xs pointing to the next xfer to perform */ void siop_donextcmd(dev) struct siop_softc *dev; { struct scsi_xfer *xs; struct scsi_link *slp; int flags, phase, stat; xs = dev->sc_xs; slp = xs->sc_link; flags = xs->flags; #if 0 if (flags & SCSI_DATA_IN) phase = DATA_IN_PHASE; else if (flags & SCSI_DATA_OUT) phase = DATA_OUT_PHASE; else phase = STATUS_PHASE; #endif if (flags & SCSI_RESET) siopreset(dev); dev->sc_stat[0] = -1; #if 0 if (phase == STATUS_PHASE || flags & SCSI_NOMASK) #else if (flags & SCSI_NOMASK || siop_no_dma) #endif stat = siopicmd(dev, slp->target, xs->cmd, xs->cmdlen, xs->data, xs->datalen/*, phase*/); else if (siopgo(dev, xs) == 0) return; else stat = dev->sc_stat[0]; siop_scsidone(dev, stat); } void siop_scsidone(dev, stat) struct siop_softc *dev; int stat; { struct siop_pending *pendp; struct scsi_xfer *xs; int s, donext; xs = dev->sc_xs; #ifdef DIAGNOSTIC if (xs == NULL) panic("siop_scsidone"); #endif /* * is this right? */ xs->status = stat; if (stat == 0 || xs->flags & SCSI_ERR_OK) xs->resid = 0; else { switch(stat) { case SCSI_CHECK: if (stat = siopgetsense(dev, xs)) goto bad_sense; xs->error = XS_SENSE; break; case SCSI_BUSY: xs->error = XS_BUSY; break; bad_sense: default: xs->error = XS_DRIVER_STUFFUP; QPRINTF(("siop_scsicmd() bad %x\n", stat)); break; } } xs->flags |= ITSDONE; /* * grab next command before scsi_done() * this way no single device can hog scsi resources. */ s = splbio(); pendp = dev->sc_xslist.tqh_first; if (pendp == NULL) { donext = 0; dev->sc_xs = NULL; } else { donext = 1; TAILQ_REMOVE(&dev->sc_xslist, pendp, link); dev->sc_xs = pendp->xs; pendp->xs = NULL; } splx(s); scsi_done(xs); if (donext) siop_donextcmd(dev); } int siopgetsense(dev, xs) struct siop_softc *dev; struct scsi_xfer *xs; { struct scsi_sense rqs; struct scsi_link *slp; int stat; slp = xs->sc_link; rqs.op_code = REQUEST_SENSE; rqs.byte2 = slp->lun << 5; #ifdef not_yet rqs.length = xs->req_sense_length ? xs->req_sense_length : sizeof(xs->sense); #else rqs.length = sizeof(xs->sense); #endif if (rqs.length > sizeof (xs->sense)) rqs.length = sizeof (xs->sense); rqs.unused[0] = rqs.unused[1] = rqs.control = 0; return(siopicmd(dev, slp->target, &rqs, sizeof(rqs), &xs->sense, rqs.length)); } void siopabort(dev, regs, where) register struct siop_softc *dev; siop_regmap_p regs; char *where; { printf ("%s: abort %s: dstat %02x, sstat0 %02x sbcl %02x\n", dev->sc_dev.dv_xname, where, regs->siop_dstat, regs->siop_sstat0, regs->siop_sbcl); if (dev->sc_flags & SIOP_SELECTED) { #ifdef TODO SET_SBIC_cmd (regs, SBIC_CMD_ABORT); WAIT_CIP (regs); GET_SBIC_asr (regs, asr); if (asr & (SBIC_ASR_BSY|SBIC_ASR_LCI)) { /* ok, get more drastic.. */ SET_SBIC_cmd (regs, SBIC_CMD_RESET); delay(25); SBIC_WAIT(regs, SBIC_ASR_INT, 0); GET_SBIC_csr (regs, csr); /* clears interrupt also */ dev->sc_flags &= ~SIOP_SELECTED; return; } do { SBIC_WAIT (regs, SBIC_ASR_INT, 0); GET_SBIC_csr (regs, csr); } while ((csr != SBIC_CSR_DISC) && (csr != SBIC_CSR_DISC_1) && (csr != SBIC_CSR_CMD_INVALID)); #endif /* lets just hope it worked.. */ dev->sc_flags &= ~SIOP_SELECTED; } } /* * XXX Set/reset long delays. * * if delay == 0, reset default delays * if delay < 0, set both delays to default long initialization values * if delay > 0, set both delays to this value * * Used when a devices is expected to respond slowly (e.g. during * initialization). */ void siop_delay(delay) int delay; { static int saved_cmd_wait, saved_data_wait; if (delay) { saved_cmd_wait = siop_cmd_wait; saved_data_wait = siop_data_wait; if (delay > 0) siop_cmd_wait = siop_data_wait = delay; else siop_cmd_wait = siop_data_wait = siop_init_wait; } else { siop_cmd_wait = saved_cmd_wait; siop_data_wait = saved_data_wait; } } void siopinitialize(dev) struct siop_softc *dev; { /* * Need to check that scripts is on a long word boundary * and that DS is on a long word boundary. * Also need to verify that dev doesn't non-contiguous * physical pages. */ dev->sc_scriptspa = kvtop(scripts); dev->sc_dspa = kvtop(&dev->sc_ds); dev->sc_lunpa = kvtop(&dev->sc_lun); dev->sc_statuspa = kvtop(&dev->sc_stat[0]); dev->sc_msgpa = kvtop(&dev->sc_msg[0]); siopreset (dev); } void siopreset(dev) struct siop_softc *dev; { siop_regmap_p regs; u_int i, s; u_char my_id, csr; regs = dev->sc_siopp; if (dev->sc_flags & SIOP_ALIVE) siopabort(dev, regs, "reset"); printf("%s: ", dev->sc_dev.dv_xname); /* XXXX */ s = splbio(); my_id = 7; /* * Reset the chip * XXX - is this really needed? */ regs->siop_sien &= ~SIOP_SIEN_RST; regs->siop_scntl1 |= SIOP_SCNTL1_RST; for (i = 0; i < 1000; ++i) ; regs->siop_scntl1 &= ~SIOP_SCNTL1_RST; regs->siop_sien |= SIOP_SIEN_RST; /* * Set up various chip parameters */ regs->siop_istat = 0x40; for (i = 0; i < 1000; ++i) ; regs->siop_istat = 0x00; regs->siop_scntl0 = SIOP_ARB_FULL | SIOP_SCNTL0_EPC | SIOP_SCNTL0_EPG; regs->siop_dcntl = dev->sc_clock_freq & 0xff; regs->siop_dmode = 0x80; /* burst length = 4 */ regs->siop_sien = 0x00; /* don't enable interrupts yet */ regs->siop_dien = 0x00; /* don't enable interrupts yet */ regs->siop_scid = 1 << my_id; regs->siop_dwt = 0x00; regs->siop_ctest0 |= 0x20; /* Enable Active Negation ?? */ regs->siop_ctest7 |= (dev->sc_clock_freq >> 8) & 0xff; /* will need to re-negotiate sync xfers */ bzero(&dev->sc_sync, sizeof (dev->sc_sync)); splx (s); delay (siop_reset_delay * 1000); printf("siop id %d reset\n", my_id); dev->sc_flags |= SIOP_ALIVE; dev->sc_flags &= ~(SIOP_SELECTED | SIOP_DMA); } /* * Setup Data Storage for 53C710 and start SCRIPTS processing */ void siop_setup (dev, target, cbuf, clen, buf, len) struct siop_softc *dev; int target; u_char *cbuf; int clen; u_char *buf; int len; { siop_regmap_p regs = dev->sc_siopp; int i; int nchain; int count, tcount; char *addr, *dmaend; dev->sc_istat = 0; dev->sc_lun = 0x80; /* XXX */ dev->sc_stat[0] = -1; dev->sc_msg[0] = -1; dev->sc_ds.scsi_addr = (0x10000 << target) | (dev->sc_sync[target].period << 8); dev->sc_ds.idlen = 1; dev->sc_ds.idbuf = (char *) dev->sc_lunpa; dev->sc_ds.cmdlen = clen; dev->sc_ds.cmdbuf = (char *) kvtop(cbuf); dev->sc_ds.stslen = 1; dev->sc_ds.stsbuf = (char *) dev->sc_statuspa; dev->sc_ds.msglen = 1; dev->sc_ds.msgbuf = (char *) dev->sc_msgpa; dev->sc_ds.sdtrolen = 0; dev->sc_ds.sdtrilen = 0; bzero(&dev->sc_ds.chain, sizeof (dev->sc_ds.chain)); if (dev->sc_sync[target].state == SYNC_START) { if (siop_inhibit_sync[target]) { dev->sc_sync[target].state = SYNC_DONE; dev->sc_sync[target].offset = 0; dev->sc_sync[target].period = 0; #ifdef DEBUG if (siopsync_debug) printf ("Forcing target %d asynchronous\n", target); #endif } else { dev->sc_msg[1] = MSG_IDENTIFY; dev->sc_msg[2] = MSG_EXT_MESSAGE; dev->sc_msg[3] = 3; dev->sc_msg[4] = MSG_SYNC_REQ; dev->sc_msg[5] = siop_sync_period / 4; dev->sc_msg[6] = SIOP_MAX_OFFSET; dev->sc_ds.sdtrolen = 6; dev->sc_ds.sdtrilen = 6; dev->sc_ds.sdtrobuf = dev->sc_ds.sdtribuf = (char *) (dev->sc_msgpa + 1); dev->sc_sync[target].state = SYNC_SENT; #ifdef DEBUG if (siopsync_debug) printf ("Sending sync request to target %d\n", target); #endif } } /* * If length is > 1 page, check for consecutive physical pages * Need to set up chaining if not */ nchain = 0; count = len; addr = buf; dmaend = NULL; while (count > 0) { dev->sc_ds.chain[nchain].databuf = (char *) kvtop (addr); if (count < (tcount = NBPG - ((int) addr & PGOFSET))) tcount = count; dev->sc_ds.chain[nchain].datalen = tcount; addr += tcount; count -= tcount; if (dev->sc_ds.chain[nchain].databuf == dmaend) { dmaend += dev->sc_ds.chain[nchain].datalen; dev->sc_ds.chain[--nchain].datalen += tcount; #ifdef DEBUG ++siopdma_hits; #endif } else { dmaend = dev->sc_ds.chain[nchain].databuf + dev->sc_ds.chain[nchain].datalen; dev->sc_ds.chain[nchain].datalen = tcount; #ifdef DEBUG if (nchain) /* Don't count miss on first one */ ++siopdma_misses; #endif } ++nchain; if (nchain < DMAMAXIO) /* force error if buffer too small */ dev->sc_ds.chain[nchain].datalen = 0; } #ifdef DEBUG if (nchain != 1 && len != 0 && siop_debug & 3) { printf ("DMA chaining set: %d\n", nchain); for (i = 0; i < nchain; ++i) { printf (" [%d] %8x %4x\n", i, dev->sc_ds.chain[i].databuf, dev->sc_ds.chain[i].datalen); } } #endif regs->siop_sbcl = dev->sc_sync[target].offset; if (dev->sc_ds.sdtrolen) regs->siop_scratch = regs->siop_scratch | 0x100; else regs->siop_scratch = regs->siop_scratch & ~0xff00; regs->siop_dsa = dev->sc_dspa; /* push data case on things the 53c710 needs to access */ dma_cachectl (dev, sizeof (struct siop_softc)); dma_cachectl (cbuf, clen); if (buf != NULL && len != 0) dma_cachectl (buf, len); regs->siop_dsp = dev->sc_scriptspa; } /* * Process a DMA or SCSI interrupt from the 53C710 SIOP */ int siop_checkintr(dev, istat, dstat, sstat0, status) struct siop_softc *dev; u_char istat; u_char dstat; u_char sstat0; int *status; { siop_regmap_p regs = dev->sc_siopp; int target; regs->siop_ctest8 |= 0x04; while ((regs->siop_ctest1 & SIOP_CTEST1_FMT) == 0) ; regs->siop_ctest8 &= ~0x04; #ifdef DEBUG if (siop_debug & 1) { DCIAS(dev->sc_statuspa); /* XXX */ printf ("siopchkintr: istat %x dstat %x sstat0 %x dsps %x sbcl %x sts %x msg %x\n", istat, dstat, sstat0, regs->siop_dsps, regs->siop_sbcl, dev->sc_stat[0], dev->sc_msg[0]); } #endif if (dstat & SIOP_DSTAT_SIR && (regs->siop_dsps == 0xff00 || regs->siop_dsps == 0xfffc)) { /* Normal completion status, or check condition */ if (regs->siop_dsa != dev->sc_dspa) { printf ("siop: invalid dsa: %x %x\n", regs->siop_dsa, dev->sc_dspa); panic("*** siop DSA invalid ***"); } target = dev->sc_slave; if (dev->sc_sync[target].state == SYNC_SENT) { #ifdef DEBUG if (siopsync_debug) printf ("sync msg in: %02x %02x %02x %02x %02x %02x\n", dev->sc_msg[1], dev->sc_msg[2], dev->sc_msg[3], dev->sc_msg[4], dev->sc_msg[5], dev->sc_msg[6]); #endif if (dev->sc_msg[0] == MSG_REJECT) printf ("target %d sync request was rejected\n", target); dev->sc_sync[target].state = SYNC_DONE; dev->sc_sync[target].period = 0; dev->sc_sync[target].offset = 0; if (dev->sc_msg[1] == MSG_EXT_MESSAGE && dev->sc_msg[2] == 3 && dev->sc_msg[3] == MSG_SYNC_REQ && dev->sc_msg[5] != 0) { if (dev->sc_msg[4] && dev->sc_msg[4] < 100 / 4) { #ifdef DEBUG printf ("%d: target %d wanted %dns period\n", dev->sc_dev.dv_xname, target, dev->sc_msg[4] * 4); #endif /* * Kludge for Maxtor XT8580S * It accepts whatever we request, even * though it won't work. So we ask for * a short period than we can handle. If * the device says it can do it, use 208ns. * If the device says it can do less than * 100ns, then we limit it to 100ns. */ if (dev->sc_msg[4] == siop_sync_period / 4) dev->sc_msg[4] = 208 / 4; else dev->sc_msg[4] = 100 / 4; } printf ("%s: target %d now synchronous, period=%dns, offset=%d\n", dev->sc_dev.dv_xname, target, dev->sc_msg[4] * 4, dev->sc_msg[5]); scsi_period_to_siop (dev, target); } } #if 0 DCIAS(dev->sc_statuspa); /* XXX */ #else dma_cachectl(&dev->sc_stat[0], 1); #endif *status = dev->sc_stat[0]; return 1; } if (sstat0 & SIOP_SSTAT0_M_A) { /* Phase mismatch */ #ifdef DEBUG if (siop_debug & 9) printf ("Phase mismatch: %x dsp +%x\n", regs->siop_sbcl, regs->siop_dsp - dev->sc_scriptspa); if (siop_debug & 0x10) panic ("53c710 phase mismatch"); #endif if ((regs->siop_sbcl & SIOP_REQ) == 0) printf ("Phase mismatch: REQ not asserted! %02x\n", regs->siop_sbcl); switch (regs->siop_sbcl & 7) { /* * For data out and data in phase, check for DMA chaining */ /* * for message in, check for possible reject for sync request */ case 0: regs->siop_dsp = dev->sc_scriptspa + Ent_dataout; break; case 1: regs->siop_dsp = dev->sc_scriptspa + Ent_datain; break; case 2: regs->siop_dsp = dev->sc_scriptspa + Ent_cmd; break; case 3: regs->siop_dsp = dev->sc_scriptspa + Ent_status; break; case 6: regs->siop_dsp = dev->sc_scriptspa + Ent_msgout; break; case 7: regs->siop_dsp = dev->sc_scriptspa + Ent_msgin; break; default: goto bad_phase; } return 0; } if (sstat0 & SIOP_SSTAT0_STO) { /* Select timed out */ *status = -1; return 1; } if (dstat & SIOP_DSTAT_SIR && regs->siop_dsps == 0xff05 && (regs->siop_sbcl & (SIOP_MSG | SIOP_CD)) == 0) { printf ("DMA chaining failed\n"); siopreset (dev); *status = -1; return 1; } if (dstat & SIOP_DSTAT_SIR && regs->siop_dsps == 0xff27) { #ifdef DEBUG if (siop_debug & 3) printf ("DMA chaining completed: dsa %x dnad %x addr %x\n", regs->siop_dsa, regs->siop_dnad, regs->siop_addr); ++siopchain_ints; #endif regs->siop_dsa = dev->sc_dspa; regs->siop_dsp = dev->sc_scriptspa + Ent_status; return 0; } target = dev->sc_slave; if (dstat & SIOP_DSTAT_SIR && regs->siop_dsps == 0xff26 && dev->sc_msg[0] == MSG_REJECT && dev->sc_sync[target].state == SYNC_SENT) { dev->sc_sync[target].state = SYNC_DONE; dev->sc_sync[target].period = 0; dev->sc_sync[target].offset = 0; dev->sc_ds.sdtrolen = 0; dev->sc_ds.sdtrilen = 0; #ifdef DEBUG if (siopsync_debug || 1) printf ("target %d rejected sync, going asynchronous\n", target); #endif siop_inhibit_sync[target] = -1; if ((regs->siop_sbcl & 7) == 6) { regs->siop_dsp = dev->sc_scriptspa + Ent_msgout; return (0); } regs->siop_dcntl |= SIOP_DCNTL_STD; return (0); } if ((dstat & SIOP_DSTAT_SIR && regs->siop_dsps == 0xff13) || sstat0 & SIOP_SSTAT0_UDC) { #ifdef DEBUG printf ("%s: target %d disconnected unexpectedly\n", dev->sc_dev.dv_xname, target); #endif #if 0 siopabort (dev, regs, "siopchkintr"); #endif *status = STS_BUSY; return 1; } if (dstat & SIOP_DSTAT_SIR &®s->siop_dsps == 0xfffb) { #if 0 printf ("%s: target %d busy\n", dev->sc_dev.dv_xname, target); #endif #if 0 siopabort (dev, regs, "siopchkintr"); #endif *status = STS_BUSY; return 1; } if (sstat0 == 0 && dstat & SIOP_DSTAT_SIR) { #if 0 DCIAS(dev->sc_statuspa); #else dma_cachectl (&dev->sc_stat[0], 1); #endif printf ("SIOP interrupt: %x sts %x msg %x sbcl %x\n", regs->siop_dsps, dev->sc_stat[0], dev->sc_msg[0], regs->siop_sbcl); siopreset (dev); *status = -1; return 1; } if (sstat0 & SIOP_SSTAT0_SGE) printf ("SIOP: SCSI Gross Error\n"); if (sstat0 & SIOP_SSTAT0_PAR) printf ("SIOP: Parity Error\n"); if (dstat & SIOP_DSTAT_OPC) printf ("SIOP: Invalid SCRIPTS Opcode\n"); bad_phase: /* * temporary panic for unhandled conditions * displays various things about the 53C710 status and registers * then panics. * XXXX need to clean this up to print out the info, reset, and continue */ printf ("siopchkintr: target %x ds %x\n", target, &dev->sc_ds); printf ("scripts %x ds %x regs %x dsp %x dcmd %x\n", dev->sc_scriptspa, dev->sc_dspa, kvtop(regs), regs->siop_dsp, *((long *)®s->siop_dcmd)); printf ("siopchkintr: istat %x dstat %x sstat0 %x dsps %x dsa %x sbcl %x sts %x msg %x\n", istat, dstat, sstat0, regs->siop_dsps, regs->siop_dsa, regs->siop_sbcl, dev->sc_stat[0], dev->sc_msg[0]); #ifdef DEBUG if (siop_debug & 0x20) panic("siopchkintr: **** temp ****"); #endif siopreset (dev); /* hard reset */ *status = -1; return 1; } /* * SCSI 'immediate' command: issue a command to some SCSI device * and get back an 'immediate' response (i.e., do programmed xfer * to get the response data). 'cbuf' is a buffer containing a scsi * command of length clen bytes. 'buf' is a buffer of length 'len' * bytes for data. The transfer direction is determined by the device * (i.e., by the scsi bus data xfer phase). If 'len' is zero, the * command must supply no data. 'xferphase' is the bus phase the * caller expects to happen after the command is issued. It should * be one of DATA_IN_PHASE, DATA_OUT_PHASE or STATUS_PHASE. * * XXX - 53C710 will use DMA, but no interrupts (it's a heck of a * lot easier to do than to use programmed I/O). * */ int siopicmd(dev, target, cbuf, clen, buf, len) struct siop_softc *dev; int target; void *cbuf; int clen; void *buf; int len; { siop_regmap_p regs = dev->sc_siopp; int i; int status; u_char istat; u_char dstat; u_char sstat0; if (dev->sc_flags & SIOP_SELECTED) { printf ("siopicmd%d: bus busy\n", target); return -1; } regs->siop_sien = 0x00; /* disable SCSI and DMA interrupts */ regs->siop_dien = 0x00; dev->sc_flags |= SIOP_SELECTED; dev->sc_slave = target; #ifdef DEBUG if (siop_debug & 1) printf ("siopicmd: target %x cmd %02x ds %x\n", target, *((char *)cbuf), &dev->sc_ds); #endif siop_setup (dev, target, cbuf, clen, buf, len); for (;;) { /* use cmd_wait values? */ i = siop_cmd_wait << 1; while (((istat = regs->siop_istat) & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) { if (--i <= 0) { printf ("waiting: tgt %d cmd %02x sbcl %02x dsp %x (+%x) dcmd %x ds %x\n", target, *((char *)cbuf), regs->siop_sbcl, regs->siop_dsp, regs->siop_dsp - dev->sc_scriptspa, *((long *)®s->siop_dcmd), &dev->sc_ds); i = siop_cmd_wait << 2; /* XXXX need an upper limit and reset */ } delay(1); } dstat = regs->siop_dstat; sstat0 = regs->siop_sstat0; #ifdef DEBUG if (siop_debug & 1) { DCIAS(dev->sc_statuspa); /* XXX should just invalidate dev->sc_stat */ printf ("siopicmd: istat %x dstat %x sstat0 %x dsps %x sbcl %x sts %x msg %x\n", istat, dstat, sstat0, regs->siop_dsps, regs->siop_sbcl, dev->sc_stat[0], dev->sc_msg[0]); } #endif if (siop_checkintr(dev, istat, dstat, sstat0, &status)) { dev->sc_flags &= ~SIOP_SELECTED; return (status); } } } int siopgo(dev, xs) struct siop_softc *dev; struct scsi_xfer *xs; { siop_regmap_p regs; int i; int nchain; int count, tcount; char *addr, *dmaend; #ifdef DEBUG if (siop_debug & 1) printf ("%s: go ", dev->sc_dev.dv_xname); #if 0 if ((cdb->cdb[1] & 1) == 0 && ((cdb->cdb[0] == CMD_WRITE && cdb->cdb[2] == 0 && cdb->cdb[3] == 0) || (cdb->cdb[0] == CMD_WRITE_EXT && cdb->cdb[2] == 0 && cdb->cdb[3] == 0 && cdb->cdb[4] == 0))) panic ("siopgo: attempted write to block < 0x100"); #endif #endif #if 0 cdb->cdb[1] |= unit << 5; #endif if (dev->sc_flags & SIOP_SELECTED) { printf ("%s: bus busy\n", dev->sc_dev.dv_xname); return 1; } dev->sc_flags |= SIOP_SELECTED | SIOP_DMA; dev->sc_slave = xs->sc_link->target; regs = dev->sc_siopp; /* enable SCSI and DMA interrupts */ regs->siop_sien = SIOP_SIEN_M_A | SIOP_SIEN_STO | SIOP_SIEN_SEL | SIOP_SIEN_SGE | SIOP_SIEN_UDC | SIOP_SIEN_RST | SIOP_SIEN_PAR; regs->siop_dien = 0x20 | SIOP_DIEN_ABRT | SIOP_DIEN_SIR | SIOP_DIEN_WTD | SIOP_DIEN_OPC; #ifdef DEBUG if (siop_debug & 1) printf ("siopgo: target %x cmd %02x ds %x\n", dev->sc_slave, xs->cmd->opcode, &dev->sc_ds); #endif siop_setup(dev, dev->sc_slave, xs->cmd, xs->cmdlen, xs->data, xs->datalen); return (0); } /* * Check for 53C710 interrupts */ int siopintr (dev) register struct siop_softc *dev; { siop_regmap_p regs; register u_char istat, dstat, sstat0; int unit; int status; int found = 0; regs = dev->sc_siopp; istat = dev->sc_istat; if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) return; if ((dev->sc_flags & (SIOP_DMA | SIOP_SELECTED)) == SIOP_SELECTED) return; /* doing non-interrupt I/O */ /* Got a valid interrupt on this device */ dstat = dev->sc_dstat; sstat0 = dev->sc_sstat0; dev->sc_istat = 0; #ifdef DEBUG if (siop_debug & 1) printf ("%s: intr istat %x dstat %x sstat0 %x\n", dev->sc_dev.dv_xname, istat, dstat, sstat0); if ((dev->sc_flags & SIOP_DMA) == 0) { printf ("%s: spurious interrupt? istat %x dstat %x sstat0 %x\n", dev->sc_dev.dv_xname, istat, dstat, sstat0); } #endif #ifdef DEBUG if (siop_debug & 5) { DCIAS(dev->sc_statuspa); printf ("siopintr%d: istat %x dstat %x sstat0 %x dsps %x sbcl %x sts %x msg %x\n", unit, istat, dstat, sstat0, regs->siop_dsps, regs->siop_sbcl, dev->sc_stat[0], dev->sc_msg[0]); } #endif if (siop_checkintr (dev, istat, dstat, sstat0, &status)) { #if 1 regs->siop_sien = 0; regs->siop_dien = 0; if (status == 0xff) printf ("siopintr: status == 0xff\n"); #endif dev->sc_flags &= ~(SIOP_DMA | SIOP_SELECTED); siop_scsidone(dev, dev->sc_stat[0]); } } scsi_period_to_siop (dev, target) struct siop_softc *dev; { int period, offset, i, sxfer; period = dev->sc_msg[4]; offset = dev->sc_msg[5]; sxfer = 0; if (offset <= SIOP_MAX_OFFSET) sxfer = offset; for (i = 0; i < sizeof (xxx) / 2; ++i) { if (period <= xxx[i].x) { sxfer |= xxx[i].y & 0x70; offset = xxx[i].y & 0x03; break; } } dev->sc_sync[target].period = sxfer; dev->sc_sync[target].offset = offset; #ifdef DEBUG printf ("sync: siop_sxfr %02x, siop_sbcl %02x\n", sxfer, offset); #endif }