diff options
Diffstat (limited to 'sys/dev/nsp/nsp.c')
| -rw-r--r-- | sys/dev/nsp/nsp.c | 1373 |
1 files changed, 1373 insertions, 0 deletions
diff --git a/sys/dev/nsp/nsp.c b/sys/dev/nsp/nsp.c new file mode 100644 index 0000000..c2b6762 --- /dev/null +++ b/sys/dev/nsp/nsp.c @@ -0,0 +1,1373 @@ +/* $FreeBSD$ */ +/* $NecBSD: nsp.c,v 1.21 1999/07/23 21:00:05 honda Exp $ */ +/* $NetBSD$ */ + +#define NSP_DEBUG +#define NSP_STATICS + +/* + * Copyright (c) 1998 + * NetBSD/pc98 porting staff. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +#include "opt_ddb.h" + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/disklabel.h> +#if defined(__FreeBSD__) && __FreeBSD_version > 500001 +#include <sys/bio.h> +#endif +#include <sys/buf.h> +#include <sys/queue.h> +#include <sys/malloc.h> +#include <sys/device_port.h> +#include <sys/errno.h> + +#include <vm/vm.h> + +#ifdef __NetBSD__ +#include <machine/bus.h> +#include <machine/intr.h> + +#include <dev/scsipi/scsi_all.h> +#include <dev/scsipi/scsipi_all.h> +#include <dev/scsipi/scsiconf.h> +#include <dev/scsipi/scsi_disk.h> + +#include <machine/dvcfg.h> +#include <machine/physio_proc.h> + +#include <i386/Cbus/dev/scsi_low.h> +#include <i386/Cbus/dev/nspreg.h> +#include <i386/Cbus/dev/nspvar.h> +#endif /* __NetBSD__ */ + +#ifdef __FreeBSD__ +#include <machine/clock.h> +#define delay(time) DELAY(time) + +#include <machine/cpu.h> +#include <machine/bus_pio.h> +#include <machine/bus_memio.h> +#include <machine/bus.h> + +#include <machine/dvcfg.h> +#include <machine/physio_proc.h> + +#include <cam/scsi/scsi_low.h> +#include <dev/nsp/nspreg.h> +#include <dev/nsp/nspvar.h> + +#if __FreeBSD_version < 400001 +#include "nsp.h" +struct nsp_softc *nspdata[NNSP]; +#endif +#endif /* __FreeBSD__ */ + +/*************************************************** + * USER SETTINGS + ***************************************************/ +/* DEVICE CONFIGURATION FLAGS (MINOR) + * + * 0x01 DISCONECT OFF + * 0x02 PARITY LINE OFF + * 0x04 IDENTIFY MSG OFF ( = single lun) + * 0x08 SYNC TRANSFER OFF + */ + +/*************************************************** + * PARAMS + ***************************************************/ +#define NSP_NTARGETS 8 +#define NSP_NLUNS 8 + +#define NSP_SELTIMEOUT 200 + +/*************************************************** + * DEBUG + ***************************************************/ +#ifndef DDB +#define Debugger() panic("should call debugger here (nsp.c)") +#else /* ! DDB */ +#ifdef __FreeBSD__ +#define Debugger() Debugger("nsp") +#endif /* __FreeBSD__ */ +#endif + +#ifdef NSP_DEBUG +int nsp_debug; +#endif /* NSP_DEBUG */ + +#ifdef NSP_STATICS +struct nsp_statics { + int disconnect; + int reselect; + int data_phase_bypass; +} nsp_statics[NSP_NTARGETS]; +#endif /* NSP_STATICS */ + +/*************************************************** + * ISA DEVICE STRUCTURE + ***************************************************/ +extern struct cfdriver nsp_cd; + +/************************************************************** + * DECLARE + **************************************************************/ +/* static */ +static void nsp_pio_read __P((struct nsp_softc *, struct targ_info *)); +static void nsp_pio_write __P((struct nsp_softc *, struct targ_info *)); +static int nsp_xfer __P((struct nsp_softc *, u_int8_t *, int, int)); +static int nsp_msg __P((struct nsp_softc *, struct targ_info *, u_int)); +static int nsp_reselected __P((struct nsp_softc *)); +static __inline int nsp_disconnected __P((struct nsp_softc *, struct targ_info *)); +static __inline void nsp_pdma_end __P((struct nsp_softc *, struct targ_info *)); +static void nsphw_init __P((struct nsp_softc *)); +static int nsp_nexus __P((struct nsp_softc *, struct targ_info *)); +static int nsp_world_start __P((struct nsp_softc *, int)); +static int nsphw_start_selection __P((struct nsp_softc *sc, struct slccb *)); +static void nsphw_bus_reset __P((struct nsp_softc *)); +static void nsphw_attention __P((struct nsp_softc *)); +static u_int nsp_fifo_count __P((struct nsp_softc *)); +static int nsp_negate_signal __P((struct nsp_softc *, u_int8_t, u_char *)); +static int nsp_expect_signal __P((struct nsp_softc *, u_int8_t, u_int8_t)); +static __inline void nsp_start_timer __P((struct nsp_softc *, int)); +static int nsp_dataphase_bypass __P((struct nsp_softc *, struct targ_info *)); +static void nsp_setup_fifo __P((struct nsp_softc *, int)); +static int nsp_lun_init __P((struct nsp_softc *, struct targ_info *, struct lun_info *)); +static void settimeout __P((void *)); + +struct scsi_low_funcs nspfuncs = { + SC_LOW_INIT_T nsp_world_start, + SC_LOW_BUSRST_T nsphw_bus_reset, + SC_LOW_LUN_INIT_T nsp_lun_init, + + SC_LOW_SELECT_T nsphw_start_selection, + SC_LOW_NEXUS_T nsp_nexus, + + SC_LOW_ATTEN_T nsphw_attention, + SC_LOW_MSG_T nsp_msg, + + SC_LOW_POLL_T nspintr, + + NULL, +}; + +/**************************************************** + * hwfuncs + ****************************************************/ +static __inline u_int8_t nsp_cr_read_1 __P((bus_space_tag_t bst, bus_space_handle_t bsh, bus_addr_t ofs)); +static __inline void nsp_cr_write_1 __P((bus_space_tag_t bst, bus_space_handle_t bsh, bus_addr_t ofs, u_int8_t va)); + +static __inline u_int8_t +nsp_cr_read_1(bst, bsh, ofs) + bus_space_tag_t bst; + bus_space_handle_t bsh; + bus_addr_t ofs; +{ + + bus_space_write_1(bst, bsh, nsp_idxr, ofs); + return bus_space_read_1(bst, bsh, nsp_datar); +} + +static __inline void +nsp_cr_write_1(bst, bsh, ofs, va) + bus_space_tag_t bst; + bus_space_handle_t bsh; + bus_addr_t ofs; + u_int8_t va; +{ + + bus_space_write_1(bst, bsh, nsp_idxr, ofs); + bus_space_write_1(bst, bsh, nsp_datar, va); +} + +static int +nsp_expect_signal(sc, curphase, mask) + struct nsp_softc *sc; + u_int8_t curphase, mask; +{ + struct scsi_low_softc *slp = &sc->sc_sclow; + bus_space_tag_t bst = sc->sc_iot; + bus_space_handle_t bsh = sc->sc_ioh; + int rv = -1; + int s; + int tout = 0; +#ifdef __FreeBSD__ + struct callout_handle ch; +#endif + u_int8_t ph, isrc; + +#ifdef __FreeBSD__ + ch = timeout(settimeout, &tout, hz/2); +#else + timeout(settimeout, &tout, hz/2); +#endif + do + { + ph = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON); + if (ph == 0xff) { + rv = -1; + break; + } + isrc = bus_space_read_1(bst, bsh, nsp_irqsr); + if (isrc & IRQSR_SCSI) { + rv = 0; + break; + } + if ((ph & mask) != 0 && (ph & SCBUSMON_PHMASK) == curphase) { + rv = 1; + break; + } + } + while (tout == 0); + + s = splhigh(); + if (tout == 0) { +#ifdef __FreeBSD__ + untimeout(settimeout, &tout, ch); +#else + untimeout(settimeout, &tout); +#endif + splx(s); + } else { + splx(s); + printf("%s: nsp_expect_signal timeout\n", slp->sl_xname); + rv = -1; + } + + return rv; +} + +static void +nsphw_init(sc) + struct nsp_softc *sc; +{ + bus_space_tag_t bst = sc->sc_iot; + bus_space_handle_t bsh = sc->sc_ioh; + + /* block all interrupts */ + bus_space_write_1(bst, bsh, nsp_irqcr, IRQCR_ALLMASK); + + /* setup SCSI interface */ + bus_space_write_1(bst, bsh, nsp_ifselr, IFSELR_IFSEL); + + nsp_cr_write_1(bst, bsh, NSPR_SCIENR, 0); + + nsp_cr_write_1(bst, bsh, NSPR_XFERMR, XFERMR_IO8); + nsp_cr_write_1(bst, bsh, NSPR_CLKDIVR, sc->sc_iclkdiv); + + nsp_cr_write_1(bst, bsh, NSPR_SCIENR, sc->sc_icr); + nsp_cr_write_1(bst, bsh, NSPR_PARITYR, 0); + nsp_cr_write_1(bst, bsh, NSPR_PTCLRR, + PTCLRR_ACK | PTCLRR_REQ | PTCLRR_HOST | PTCLRR_RSS); + + /* setup fifo asic */ + bus_space_write_1(bst, bsh, nsp_ifselr, IFSELR_REGSEL); + nsp_cr_write_1(bst, bsh, NSPR_TERMPWRC, 0); + if ((nsp_cr_read_1(bst, bsh, NSPR_OCR) & OCR_TERMPWRS) == 0) + nsp_cr_write_1(bst, bsh, NSPR_TERMPWRC, TERMPWRC_POWON); + + nsp_cr_write_1(bst, bsh, NSPR_XFERMR, XFERMR_IO8); + nsp_cr_write_1(bst, bsh, NSPR_CLKDIVR, sc->sc_clkdiv); + nsp_cr_write_1(bst, bsh, NSPR_TIMERCNT, 0); + nsp_cr_write_1(bst, bsh, NSPR_TIMERCNT, 0); + + nsp_cr_write_1(bst, bsh, NSPR_SYNCR, 0); + nsp_cr_write_1(bst, bsh, NSPR_ACKWIDTH, 0); + + /* enable interrupts and ack them */ + nsp_cr_write_1(bst, bsh, NSPR_SCIENR, SCIENR_SCCHG | SCIENR_RESEL | SCIENR_RST); + bus_space_write_1(bst, bsh, nsp_irqcr, IRQSR_MASK); + + nsp_setup_fifo(sc, 0); +} + +/**************************************************** + * scsi low interface + ****************************************************/ +static void +nsphw_attention(sc) + struct nsp_softc *sc; +{ + bus_space_tag_t bst = sc->sc_iot; + bus_space_handle_t bsh = sc->sc_ioh; + u_int8_t cr; + + cr = nsp_cr_read_1(bst, bsh, NSPR_SCBUSCR)/* & ~SCBUSCR_ACK */; + nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, cr | SCBUSCR_ATN); +} + +static void +nsphw_bus_reset(sc) + struct nsp_softc *sc; +{ + bus_space_tag_t bst = sc->sc_iot; + bus_space_handle_t bsh = sc->sc_ioh; + int i; + + bus_space_write_1(bst, bsh, nsp_irqcr, IRQCR_ALLMASK); + + nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, SCBUSCR_RST); + delay(100 * 1000); /* 100ms */ + nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, 0); + for (i = 0; i < 5; i ++) + (void) nsp_cr_read_1(bst, bsh, NSPR_IRQPHS); + + bus_space_write_1(bst, bsh, nsp_irqcr, IRQSR_MASK); +} + +static int +nsphw_start_selection(sc, cb) + struct nsp_softc *sc; + struct slccb *cb; +{ + struct scsi_low_softc *slp = &sc->sc_sclow; + bus_space_tag_t bst = sc->sc_iot; + bus_space_handle_t bsh = sc->sc_ioh; + struct targ_info *ti = cb->ti; + register u_int8_t arbs, ph; + int s; + int tout = 0; +#ifdef __FreeBSD__ + struct callout_handle ch; +#endif + + /* check bus free */ + if (slp->sl_disc > 0) + { + s = splhigh(); + ph = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON); + if (ph != SCBUSMON_FREE) + { + splx(s); + return SCSI_LOW_START_FAIL; + } + splx(s); + } + + /* start arbitration */ + SCSI_LOW_SETUP_PHASE(ti, PH_ARBSTART); + nsp_cr_write_1(bst, bsh, NSPR_ARBITS, ARBITS_EXEC); +#ifdef __FreeBSD__ + ch = timeout(settimeout, &tout, 2 * hz); +#else + timeout(settimeout, &tout, 2 * hz); +#endif + do + { + /* XXX: what a stupid chip! */ + arbs = nsp_cr_read_1(bst, bsh, NSPR_ARBITS); + delay(1); + } + while ((arbs & (ARBITS_WIN | ARBITS_FAIL)) == 0 && tout == 0); + + s = splhigh(); + if (tout == 0) { +#ifdef __FreeBSD__ + untimeout(settimeout, &tout, ch); +#else + untimeout(settimeout, &tout); +#endif + } + splx(s); + + if ((arbs & ARBITS_WIN) == 0) + { + nsp_cr_write_1(bst, bsh, NSPR_ARBITS, ARBITS_CLR); + return SCSI_LOW_START_FAIL; + } + + /* assert select line */ + SCSI_LOW_SETUP_PHASE(ti, PH_SELSTART); + scsi_low_arbit_win(slp, ti); + delay(3); + nsp_cr_write_1(bst, bsh, NSPR_DATA, + sc->sc_idbit | (1 << ti->ti_id)); + nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, + SCBUSCR_SEL | SCBUSCR_BSY | sc->sc_busc); + delay(3); + nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, SCBUSCR_SEL | + SCBUSCR_BSY | SCBUSCR_DOUT | sc->sc_busc); + nsp_cr_write_1(bst, bsh, NSPR_ARBITS, ARBITS_CLR); + delay(3); + nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, + SCBUSCR_SEL | SCBUSCR_DOUT | sc->sc_busc); + + /* check selection timeout */ + nsp_start_timer(sc, 1000 / 51); + sc->sc_seltout = 1; + + return SCSI_LOW_START_OK; +} + +static int +nsp_world_start(sc, fdone) + struct nsp_softc *sc; + int fdone; +{ + struct scsi_low_softc *slp = &sc->sc_sclow; + intrmask_t s; + + s = splcam(); + sc->sc_cnt = 0; + sc->sc_seltout = 0; + if ((slp->sl_cfgflags & CFG_NOATTEN) == 0) + sc->sc_busc = SCBUSCR_ATN; + else + sc->sc_busc = 0; + sc->sc_icr = (SCIENR_SCCHG | SCIENR_RESEL | SCIENR_RST); + + nsphw_init(sc); + scsi_low_bus_reset(slp); + splx(s); + + SOFT_INTR_REQUIRED(slp); + return 0; +} + +struct ncp_synch_data { + u_int min_period; + u_int max_period; + u_int chip_period; + u_int ack_width; +}; + +static struct ncp_synch_data ncp_sync_data_40M[] = { + {0x0c,0x0c,0x1,0}, /* 20MB 50ns*/ + {0x19,0x19,0x3,1}, /* 10MB 100ns*/ + {0x1a,0x25,0x5,2}, /* 7.5MB 150ns*/ + {0x26,0x32,0x7,3}, /* 5MB 200ns*/ + {0x0, 0, 0, 0} +}; + +static struct ncp_synch_data ncp_sync_data_20M[] = { + {0x19,0x19,0x1,0}, /* 10MB 100ns*/ + {0x1a,0x25,0x2,0}, /* 7.5MB 150ns*/ + {0x26,0x32,0x3,1}, /* 5MB 200ns*/ + {0x0, 0, 0, 0} +}; + +static int +nsp_msg(sc, ti, msg) + struct nsp_softc *sc; + struct targ_info *ti; + u_int msg; +{ + struct ncp_synch_data *sdp; + struct lun_info *li = ti->ti_li; + struct nsp_lun_info *nli = (void *) li; + u_int period, offset; + int i; + + if ((msg & SCSI_LOW_MSG_SYNCH) == 0) + return 0; + + period = li->li_maxsynch.period; + offset = li->li_maxsynch.offset; + if (sc->sc_iclkdiv == CLKDIVR_20M) + sdp = &ncp_sync_data_20M[0]; + else + sdp = &ncp_sync_data_40M[0]; + + for (i = 0; sdp->max_period != 0; i ++, sdp ++) + { + if (period >= sdp->min_period && period <= sdp->max_period) + break; + } + + if (period != 0 && sdp->max_period == 0) + { + /* + * NO proper period/offset found, + * Retry neg with the target. + */ + li->li_maxsynch.period = 0; + li->li_maxsynch.offset = 0; + nli->nli_reg_syncr = 0; + nli->nli_reg_ackwidth = 0; + return EINVAL; + } + + nli->nli_reg_syncr = (sdp->chip_period << SYNCR_PERS) | + (offset & SYNCR_OFFM); + nli->nli_reg_ackwidth = sdp->ack_width; + return 0; +} + +static int +nsp_lun_init(sc, ti, li) + struct nsp_softc *sc; + struct targ_info *ti; + struct lun_info *li; +{ + struct nsp_lun_info *nli = (void *) li; + + li->li_maxsynch.period = 200 / 4; + li->li_maxsynch.offset = 15; + nli->nli_reg_syncr = 0; + nli->nli_reg_ackwidth = 0; + return 0; +} + +static __inline void +nsp_start_timer(sc, time) + struct nsp_softc *sc; + int time; +{ + bus_space_tag_t bst = sc->sc_iot; + bus_space_handle_t bsh = sc->sc_ioh; + + sc->sc_timer = time; + nsp_cr_write_1(bst, bsh, NSPR_TIMERCNT, time); +} + +/************************************************************** + * General probe attach + **************************************************************/ +int +nspprobesubr(iot, ioh, dvcfg) + bus_space_tag_t iot; + bus_space_handle_t ioh; + u_int dvcfg; +{ + u_int8_t regv; + + regv = bus_space_read_1(iot, ioh, nsp_fifosr); + if (regv < 0x11 || regv >= 0x20) + return 0; + return 1; +} + +int +nspprint(aux, name) + void *aux; + const char *name; +{ + + if (name != NULL) + printf("%s: scsibus ", name); + return UNCONF; +} + +void +nspattachsubr(sc) + struct nsp_softc *sc; +{ + struct scsi_low_softc *slp = &sc->sc_sclow; + + printf("\n"); + + sc->sc_idbit = (1 << slp->sl_hostid); + slp->sl_funcs = &nspfuncs; + if (sc->sc_memh != NULL) + sc->sc_xmode = NSP_MID_SMIT; + else + sc->sc_xmode = NSP_PIO; + + (void) scsi_low_attach(slp, 2, NSP_NTARGETS, NSP_NLUNS, + sizeof(struct nsp_lun_info)); +} + +/************************************************************** + * PDMA functions + **************************************************************/ +static u_int +nsp_fifo_count(sc) + struct nsp_softc *sc; +{ + bus_space_tag_t bst = sc->sc_iot; + bus_space_handle_t bsh = sc->sc_ioh; + u_int count; + + nsp_cr_write_1(bst, bsh, NSPR_PTCLRR, PTCLRR_PT); + count = bus_space_read_1(bst, bsh, nsp_datar); + count += (((u_int) bus_space_read_1(bst, bsh, nsp_datar)) << 8); + count += (((u_int) bus_space_read_1(bst, bsh, nsp_datar)) << 16); + return count; +} + +static void +nsp_setup_fifo(sc, on) + struct nsp_softc *sc; + int on; +{ + struct scsi_low_softc *slp = &sc->sc_sclow; + bus_space_tag_t bst = sc->sc_iot; + bus_space_handle_t bsh = sc->sc_ioh; + u_int8_t xfermode; + + if (on != 0) + xfermode = XFERMR_XEN | XFERMR_FIFOEN; + else + xfermode = 0; + + if ((slp->sl_scp.scp_datalen % DEV_BSIZE) != 0) + { + sc->sc_mask = 0; + xfermode |= XFERMR_IO8; + } + else + { + sc->sc_mask = 3; + if (sc->sc_xmode == NSP_MID_SMIT) + xfermode |= XFERMR_MEM32; + else + xfermode |= XFERMR_IO32; + } + + sc->sc_xfermr = xfermode; + nsp_cr_write_1(bst, bsh, NSPR_XFERMR, sc->sc_xfermr); +} + +static __inline void +nsp_pdma_end(sc, ti) + struct nsp_softc *sc; + struct targ_info *ti; +{ + struct scsi_low_softc *slp = &sc->sc_sclow; + struct slccb *cb = ti->ti_nexus; + u_int len = 0, cnt; + + slp->sl_flags &= ~HW_PDMASTART; + nsp_setup_fifo(sc, 0); + + if (ti->ti_phase == PH_DATA) + { + cnt = nsp_fifo_count(sc); + if (slp->sl_scp.scp_direction == SCSI_LOW_WRITE) + { + len = sc->sc_cnt - cnt; + if (slp->sl_scp.scp_datalen + len <= + cb->ccb_scp.scp_datalen) + { + slp->sl_scp.scp_data -= len; + slp->sl_scp.scp_datalen += len; + } + else + { + slp->sl_error |= PDMAERR; + printf("%s len %x >= datalen %x\n", + slp->sl_xname, + len, slp->sl_scp.scp_datalen); + } + } + else if (slp->sl_scp.scp_direction == SCSI_LOW_READ) + { + if (sc->sc_cnt != cnt) + { + slp->sl_error |= PDMAERR; + printf("%s: data read count error %x != %x\n", + slp->sl_xname, sc->sc_cnt, cnt); + } + } + sc->sc_cnt = cnt; + } + else + { + + printf("%s data phase miss\n", slp->sl_xname); + slp->sl_error |= PDMAERR; + } +} + +#define RFIFO_CRIT 64 +#define WFIFO_CRIT 64 + +static void +nsp_pio_read(sc, ti) + struct nsp_softc *sc; + struct targ_info *ti; +{ + struct scsi_low_softc *slp = &sc->sc_sclow; + bus_space_tag_t bst = sc->sc_iot; + bus_space_handle_t bsh = sc->sc_ioh; + int s; + int tout = 0; +#ifdef __FreeBSD__ + struct callout_handle ch; +#endif + u_int res, ocount, mask = sc->sc_mask; + u_int8_t stat, fstat; + + slp->sl_flags |= HW_PDMASTART; + ocount = sc->sc_cnt; + +#ifdef __FreeBSD__ + ch = timeout(settimeout, &tout, 2 * hz); +#else + timeout(settimeout, &tout, 2 * hz); +#endif + while (slp->sl_scp.scp_datalen > 0 && tout == 0) + { + stat = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON); + stat &= SCBUSMON_PHMASK; + res = nsp_fifo_count(sc) - ocount; + if (res == 0) + { + if (stat == PHASE_DATAIN) + continue; + break; + } + + fstat = bus_space_read_1(bst, bsh, nsp_fifosr); + if ((fstat & FIFOSR_FULLEMP) == 0 && stat == PHASE_DATAIN) + continue; + + if (res > slp->sl_scp.scp_datalen) + break; + + if (res >= NSP_BUFFER_SIZE) + res = NSP_BUFFER_SIZE; + else + res &= ~mask; + + if (sc->sc_xfermr & XFERMR_MEM32) + { + bus_space_read_region_4(sc->sc_memt, + sc->sc_memh, + 0, + (u_int32_t *) slp->sl_scp.scp_data, + res >> 2); + } + else + { + if (mask != 0) + bus_space_read_multi_4(bst, bsh, nsp_fifodr, + (u_int32_t *) slp->sl_scp.scp_data, + res >> 2); + else + bus_space_read_multi_1(bst, bsh, nsp_fifodr, + (u_int8_t *) slp->sl_scp.scp_data, + res); + } + + slp->sl_scp.scp_data += res; + slp->sl_scp.scp_datalen -= res; + ocount += res; + } + + sc->sc_cnt = ocount; + s = splhigh(); + if (tout == 0) { +#ifdef __FreeBSD__ + untimeout(settimeout, &tout, ch); +#else + untimeout(settimeout, &tout); +#endif + splx(s); + } else { + splx(s); + printf("%s pio read timeout\n", slp->sl_xname); + } +} + +static void +nsp_pio_write(sc, ti) + struct nsp_softc *sc; + struct targ_info *ti; +{ + struct scsi_low_softc *slp = &sc->sc_sclow; + bus_space_tag_t bst = sc->sc_iot; + bus_space_handle_t bsh = sc->sc_ioh; + u_int res, ocount, mask = sc->sc_mask; + int s; + int tout = 0; + register u_int8_t stat; +#ifdef __FreeBSD__ + struct callout_handle ch; +#endif + + ocount = sc->sc_cnt; + slp->sl_flags |= HW_PDMASTART; +#ifdef __FreeBSD__ + ch = timeout(settimeout, &tout, 2 * hz); +#else + timeout(settimeout, &tout, 2 * hz); +#endif + while (slp->sl_scp.scp_datalen > 0 && tout == 0) + { + stat = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON); + stat &= SCBUSMON_PHMASK; + if (stat != PHASE_DATAOUT) + break; + + res = ocount - nsp_fifo_count(sc); + if (res > 0) + continue; + + res = (slp->sl_scp.scp_datalen > WFIFO_CRIT) ? WFIFO_CRIT : + slp->sl_scp.scp_datalen; + + if (sc->sc_xfermr & XFERMR_MEM32) + { + bus_space_write_region_4(sc->sc_memt, + sc->sc_memh, + 0, + (u_int32_t *) slp->sl_scp.scp_data, + res >> 2); + } + else + { + if (mask != 0) + bus_space_write_multi_4(bst, bsh, nsp_fifodr, + (u_int32_t *) slp->sl_scp.scp_data, res >> 2); + else + bus_space_write_multi_1(bst, bsh, nsp_fifodr, + (u_int8_t *) slp->sl_scp.scp_data, res); + } + + slp->sl_scp.scp_datalen -= res; + slp->sl_scp.scp_data += res; + ocount += res; + } + + sc->sc_cnt = ocount; + s = splhigh(); + if (tout == 0) { +#ifdef __FreeBSD__ + untimeout(settimeout, &tout, ch); +#else + untimeout(settimeout, &tout); +#endif + splx(s); + } else { + splx(s); + printf("%s pio write timeout\n", slp->sl_xname); + } +} + +static void +settimeout(arg) + void *arg; +{ + int *tout = arg; + + *tout = 1; +} + +static int +nsp_negate_signal(sc, mask, s) + struct nsp_softc *sc; + u_int8_t mask; + u_char *s; +{ + struct scsi_low_softc *slp = &sc->sc_sclow; + bus_space_tag_t bst = sc->sc_iot; + bus_space_handle_t bsh = sc->sc_ioh; + int tout = 0; + int s; +#ifdef __FreeBSD__ + struct callout_handle ch; +#endif + u_int8_t regv; + +#ifdef __FreeBSD__ + ch = timeout(settimeout, &tout, hz/2); +#else + timeout(settimeout, &tout, hz/2); +#endif + do + { + regv = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON); + if (regv == 0xff) + break; + } + while ((regv & mask) != 0 && tout == 0); + + s = splhigh(); + if (tout == 0) { +#ifdef __FreeBSD__ + untimeout(settimeout, &tout, ch); +#else + untimeout(settimeout, &tout); +#endif + splx(s); + } else { + splx(s); + printf("%s: %s singla off timeout \n", slp->sl_xname, s); + } + + return 0; +} + +static int +nsp_xfer(sc, buf, len, phase) + struct nsp_softc *sc; + u_int8_t *buf; + int len; + int phase; +{ + struct scsi_low_softc *slp = &sc->sc_sclow; + bus_space_tag_t bst = sc->sc_iot; + bus_space_handle_t bsh = sc->sc_ioh; + int ptr, rv, atn; + + atn = (scsi_low_is_msgout_continue(slp->sl_nexus) != 0); + for (ptr = 0; len > 0; len --, ptr ++) + { + rv = nsp_expect_signal(sc, phase, SCBUSMON_REQ); + if (rv <= 0) + goto out; + + if (len == 1 && atn == 0) + { + nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, + SCBUSCR_ADIR | SCBUSCR_ACKEN); + } + + if (phase & SCBUSMON_IO) + { + buf[ptr] = nsp_cr_read_1(bst, bsh, NSPR_DATAACK); + } + else + { + nsp_cr_write_1(bst, bsh, NSPR_DATAACK, buf[ptr]); + } + nsp_negate_signal(sc, SCBUSMON_ACK, "xfer<ACK>"); + } + +out: + return len; +} + +static int +nsp_dataphase_bypass(sc, ti) + struct nsp_softc *sc; + struct targ_info *ti; +{ + struct scsi_low_softc *slp = &sc->sc_sclow; + struct slccb *cb = ti->ti_nexus; + u_int cnt; + + if (slp->sl_scp.scp_direction != SCSI_LOW_READ || + (slp->sl_scp.scp_datalen % DEV_BSIZE) == 0) + return 0; + + cnt = nsp_fifo_count(sc); + if (sc->sc_cnt == cnt) + return 0; + if (cnt >= DEV_BSIZE) + return EINVAL; + + if (cb == NULL) + return 0; + + /* + * XXX: NSP_QUIRK + * Data phase skip only occures in case of SCSI_LOW_READ. + */ + SCSI_LOW_SETUP_PHASE(ti, PH_DATA); + nsp_pio_read(sc, ti); + nsp_pdma_end(sc, ti); +#ifdef NSP_STATICS + nsp_statics[ti->ti_id].data_phase_bypass ++; +#endif /* NSP_STATICS */ + return 0; +} + +/************************************************************** + * disconnect & reselect (HW low) + **************************************************************/ +static int +nsp_reselected(sc) + struct nsp_softc *sc; +{ + struct scsi_low_softc *slp = &sc->sc_sclow; + bus_space_tag_t bst = sc->sc_iot; + bus_space_handle_t bsh = sc->sc_ioh; + struct targ_info *ti; + u_int sid; + u_int8_t cr; + + sid = (u_int) nsp_cr_read_1(bst, bsh, NSPR_RESELR); + sid &= ~sc->sc_idbit; + sid = ffs(sid) - 1; + if ((ti = scsi_low_reselected(slp, sid)) == NULL) + return EJUSTRETURN; + + nsp_negate_signal(sc, SCBUSMON_SEL, "reselect<SEL>"); + + cr = nsp_cr_read_1(bst, bsh, NSPR_SCBUSCR) & ~(SCBUSCR_BSY | SCBUSCR_ATN); + nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, cr); + nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, cr | SCBUSCR_ADIR | SCBUSCR_ACKEN); + +#ifdef NSP_STATICS + nsp_statics[sid].reselect ++; +#endif /* NSP_STATCIS */ + return EJUSTRETURN; +} + +static __inline int +nsp_disconnected(sc, ti) + struct nsp_softc *sc; + struct targ_info *ti; +{ + struct scsi_low_softc *slp = &sc->sc_sclow; + +#ifdef NSP_STATICS + if (slp->sl_msgphase == MSGPH_DISC) + nsp_statics[ti->ti_id].disconnect ++; +#endif /* NSP_STATICS */ + + scsi_low_disconnected(slp, ti); + return 1; +} + +/************************************************************** + * SEQUENCER + **************************************************************/ +static void nspmsg __P((struct nsp_softc *, u_char *, u_int8_t, u_int8_t, u_int8_t)); + +static void +nspmsg(sc, s, isrc, ph, irqphs) + struct nsp_softc *sc; + u_char *s; + u_int8_t isrc, ph, irqphs; +{ + struct scsi_low_softc *slp = &sc->sc_sclow; + + printf("%s: %s\n", slp->sl_xname, s); + printf("%s: isrc 0x%x scmon 0x%x irqphs 0x%x\n", + slp->sl_xname, (u_int) isrc, (u_int) ph, (u_int) irqphs); +} + +static int +nsp_nexus(sc, ti) + struct nsp_softc *sc; + struct targ_info *ti; +{ + bus_space_tag_t bst = sc->sc_iot; + bus_space_handle_t bsh = sc->sc_ioh; + struct nsp_lun_info *nli = (void *) ti->ti_li; + + /* setup synch transfer registers */ + nsp_cr_write_1(bst, bsh, NSPR_SYNCR, nli->nli_reg_syncr); + nsp_cr_write_1(bst, bsh, NSPR_ACKWIDTH, nli->nli_reg_ackwidth); + + /* setup pdma fifo */ + nsp_setup_fifo(sc, 1); + + /* clear ack counter */ + sc->sc_cnt = 0; + nsp_cr_write_1(bst, bsh, NSPR_PTCLRR, PTCLRR_PT | PTCLRR_ACK | + PTCLRR_REQ | PTCLRR_HOST); + return 0; +} + +int +nspintr(arg) + void *arg; +{ + struct nsp_softc *sc = arg; + struct scsi_low_softc *slp = &sc->sc_sclow; + bus_space_tag_t bst = sc->sc_iot; + bus_space_handle_t bsh = sc->sc_ioh; + struct targ_info *ti; + struct physio_proc *pp; + struct buf *bp; + int len, rv; + u_int8_t isrc, ph, irqphs, cr, regv; + + /******************************************* + * interrupt check + *******************************************/ + if (slp->sl_flags & HW_INACTIVE) + return 0; + + bus_space_write_1(bst, bsh, nsp_irqcr, IRQCR_IRQDIS); + isrc = bus_space_read_1(bst, bsh, nsp_irqsr); + if (isrc == 0xff || (isrc & IRQSR_MASK) == 0) + { + bus_space_write_1(bst, bsh, nsp_irqcr, 0); + return 0; + } + + /* XXX: IMPORTANT + * Do not read an irqphs register if no scsi phase interrupt. + * Unless, you should lose a scsi phase interrupt. + */ + ph = nsp_cr_read_1(bst, bsh, NSPR_SCBUSMON); + if ((isrc & IRQSR_SCSI) != 0) + { + irqphs = nsp_cr_read_1(bst, bsh, NSPR_IRQPHS); + } + else + irqphs = 0; + + /* + * timer interrupt handler (scsi vs timer interrupts) + */ + if (sc->sc_timer != 0) + { + nsp_cr_write_1(bst, bsh, NSPR_TIMERCNT, 0); + nsp_cr_write_1(bst, bsh, NSPR_TIMERCNT, 0); + sc->sc_timer = 0; + } + + if ((isrc & IRQSR_MASK) == IRQSR_TIMER && sc->sc_seltout == 0) + { + bus_space_write_1(bst, bsh, nsp_irqcr, IRQCR_TIMERCL); + return 1; + } + + bus_space_write_1(bst, bsh, nsp_irqcr, IRQCR_TIMERCL | IRQCR_FIFOCL); + + /******************************************* + * debug section + *******************************************/ +#ifdef NSP_DEBUG + if (nsp_debug) + { + nspmsg(sc, "current status", isrc, ph, irqphs); + scsi_low_print(slp, NULL); + if (nsp_debug > 1) + Debugger(); + } +#endif /* NSP_DEBUG */ + + /******************************************* + * Parse hardware SCSI irq reasons register + *******************************************/ + if ((isrc & IRQSR_SCSI) != 0) + { + if ((irqphs & IRQPHS_RST) != 0) + { + scsi_low_restart(slp, SCSI_LOW_RESTART_SOFT, + "bus reset (power off?)"); + return 1; + } + + if ((irqphs & IRQPHS_RSEL) != 0) + { + bus_space_write_1(bst, bsh, nsp_irqcr, IRQCR_RESCL); + if (nsp_reselected(sc) == EJUSTRETURN) + return 1; + } + + if ((irqphs & (IRQPHS_PCHG | IRQPHS_LBF)) == 0) + return 1; + } + + /******************************************* + * nexus check + *******************************************/ + if ((ti = slp->sl_nexus) == NULL) + { + /* unknown scsi phase changes */ + nspmsg(sc, "unknown scsi phase changes", isrc, ph, irqphs); + return 0; + } + + /******************************************* + * aribitration & selection + *******************************************/ + switch (ti->ti_phase) + { + case PH_SELSTART: + if ((ph & SCBUSMON_BSY) == 0) + { + if (sc->sc_seltout >= NSP_SELTIMEOUT) + { + sc->sc_seltout = 0; + nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, 0); + return nsp_disconnected(sc, ti); + } + sc->sc_seltout ++; + nsp_start_timer(sc, 1000 / 51); + return 1; + } + + /* attention assert */ + sc->sc_seltout = 0; + SCSI_LOW_SETUP_PHASE(ti, PH_SELECTED); + nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, sc->sc_busc); + delay(1); + nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, + sc->sc_busc | SCBUSCR_ADIR | SCBUSCR_ACKEN); + + SCSI_LOW_TARGET_ASSERT_ATN(ti); + scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_IDENTIFY, 0); + return 1; + + case PH_RESEL: + if ((ph & SCBUSMON_PHMASK) != PHASE_MSGIN) + { + scsi_low_assert_msg(slp, ti, SCSI_LOW_MSG_ABORT, 1); + return 1; + } + /* fall */ + + default: + if ((isrc & (IRQSR_SCSI | IRQSR_FIFO)) == 0) + return 1; + break; + } + + /******************************************* + * scsi seq + *******************************************/ + if (slp->sl_flags & HW_PDMASTART) + nsp_pdma_end(sc, ti); + + /* normal disconnect */ + if (slp->sl_msgphase != 0 && (irqphs & IRQPHS_LBF) != 0) + return nsp_disconnected(sc, ti); + + /* check unexpected bus free state */ + if (ph == 0) + { + nspmsg(sc, "unexpected bus free", isrc, ph, irqphs); + return nsp_disconnected(sc, ti); + } + + /* check normal scsi phase */ + switch (ph & SCBUSMON_PHMASK) + { + case PHASE_CMD: + if ((ph & SCBUSMON_REQ) == 0) + return 1; + + SCSI_LOW_SETUP_PHASE(ti, PH_CMD); + if (scsi_low_cmd(slp, ti) != 0) + break; + + nsp_cr_write_1(bst, bsh, NSPR_CMDCR, CMDCR_PTCLR); + for (len = 0; len < slp->sl_scp.scp_cmdlen; len ++) + nsp_cr_write_1(bst, bsh, NSPR_CMDDR, + slp->sl_scp.scp_cmd[len]); + + nsp_cr_write_1(bst, bsh, NSPR_CMDCR, CMDCR_PTCLR | CMDCR_EXEC); + break; + + case PHASE_DATAOUT: + SCSI_LOW_SETUP_PHASE(ti, PH_DATA); + if (scsi_low_data(slp, ti, &bp, SCSI_LOW_WRITE) != 0) + break; + + pp = physio_proc_enter(bp); + nsp_pio_write(sc, ti); + physio_proc_leave(pp); + break; + + case PHASE_DATAIN: + SCSI_LOW_SETUP_PHASE(ti, PH_DATA); + if (scsi_low_data(slp, ti, &bp, SCSI_LOW_READ) != 0) + break; + + pp = physio_proc_enter(bp); + nsp_pio_read(sc, ti); + physio_proc_leave(pp); + break; + + case PHASE_STATUS: + nsp_dataphase_bypass(sc, ti); + if ((ph & SCBUSMON_REQ) == 0) + return 1; + + SCSI_LOW_SETUP_PHASE(ti, PH_STAT); + ti->ti_status = nsp_cr_read_1(bst, bsh, NSPR_DATAACK); + break; + + case PHASE_MSGOUT: + if ((ph & SCBUSMON_REQ) == 0) + goto timerout; + + /* + * XXX: NSP QUIRK + * NSP invoke interrupts only in the case of scsi phase changes, + * therefore we should poll the scsi phase here to catch + * the next "msg out" if exists (no scsi phase changes). + */ + rv = len = 16; + do { + SCSI_LOW_SETUP_PHASE(ti, PH_MSGOUT); + + len = scsi_low_msgout(slp, ti); + if (nsp_xfer(sc, ti->ti_msgoutstr, len, PHASE_MSGOUT)) + { + scsi_low_assert_msg(slp, ti, + SCSI_LOW_MSG_RESET, 0); + nspmsg(sc, "MSGOUT: xfer short", + isrc, ph, irqphs); + } + + /* catch a next signal */ + rv = nsp_expect_signal(sc, PHASE_MSGOUT, SCBUSMON_REQ); + } + while (rv > 0 && len -- > 0); + break; + + case PHASE_MSGIN: + nsp_dataphase_bypass(sc, ti); + if ((ph & SCBUSMON_REQ) == 0) + goto timerout; + + SCSI_LOW_SETUP_PHASE(ti, PH_MSGIN); + + /* + * XXX: NSP QUIRK + * NSP invoke interrupts only in the case of scsi phase changes, + * therefore we should poll the scsi phase here to catch + * the next "msg in" if exists (no scsi phase changes). + */ + rv = len = 16; + do { + /* read a data */ + regv = nsp_cr_read_1(bst, bsh, NSPR_DATA); + + /* assert ack */ + cr = nsp_cr_read_1(bst, bsh, NSPR_SCBUSCR); + cr |= SCBUSCR_ACK; + nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, cr); + nsp_negate_signal(sc, SCBUSMON_REQ, "msgin<REQ>"); + + scsi_low_msgin(slp, ti, regv); + + /* deassert ack */ + cr = nsp_cr_read_1(bst, bsh, NSPR_SCBUSCR); + cr &= ~SCBUSCR_ACK; + nsp_cr_write_1(bst, bsh, NSPR_SCBUSCR, cr); + + /* catch a next signal */ + rv = nsp_expect_signal(sc, PHASE_MSGIN, SCBUSMON_REQ); + } + while (rv > 0 && len -- > 0); + break; + + case PHASE_SEL: + default: + nspmsg(sc, "unknown scsi phase", isrc, ph, irqphs); + break; + } + + return 1; + +timerout: + nsp_start_timer(sc, 1000 / 102); + return 0; +} |
