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Diffstat (limited to 'sys/arch/alpha/tc/asc.c')
| -rw-r--r-- | sys/arch/alpha/tc/asc.c | 2175 |
1 files changed, 0 insertions, 2175 deletions
diff --git a/sys/arch/alpha/tc/asc.c b/sys/arch/alpha/tc/asc.c deleted file mode 100644 index 5b8b4418d8c..00000000000 --- a/sys/arch/alpha/tc/asc.c +++ /dev/null @@ -1,2175 +0,0 @@ -/* $OpenBSD: asc.c,v 1.3 2002/03/14 01:26:27 millert Exp $ */ -/* $NetBSD: esp.c,v 1.26 1996/12/05 01:39:40 cgd Exp $ */ - -#ifdef __sparc__ -#define SPARC_DRIVER -#endif - -/* - * Copyright (c) 1996 Charles M. Hannum. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by Charles M. Hannum. - * 4. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -/* - * Copyright (c) 1994 Peter Galbavy - * Copyright (c) 1995 Paul Kranenburg - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by Peter Galbavy - * 4. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED - * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE - * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, - * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES - * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR - * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, - * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN - * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -/* - * Based on aic6360 by Jarle Greipsland - * - * Acknowledgements: Many of the algorithms used in this driver are - * inspired by the work of Julian Elischer (julian@tfs.com) and - * Charles Hannum (mycroft@duality.gnu.ai.mit.edu). Thanks a million! - */ - -#include <sys/types.h> -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/kernel.h> -#include <sys/errno.h> -#include <sys/ioctl.h> -#include <sys/device.h> -#include <sys/buf.h> -#include <sys/proc.h> -#include <sys/user.h> -#include <sys/queue.h> - -#include <scsi/scsi_all.h> -#include <scsi/scsiconf.h> -#include <scsi/scsi_message.h> - -#include <machine/cpu.h> -#ifdef SPARC_DRIVER -#include <machine/autoconf.h> -#include <sparc/dev/sbusvar.h> -#include <sparc/dev/dmareg.h> -#include <sparc/dev/dmavar.h> -#include <sparc/dev/espreg.h> -#include <sparc/dev/espvar.h> -#else -#include <machine/autoconf.h> /* badaddr() prototype */ -#include <dev/tc/tcvar.h> -#include <alpha/tc/tcdsvar.h> -#include <alpha/tc/ascreg.h> -#include <alpha/tc/ascvar.h> -#endif - -int esp_debug = 0; /*ESP_SHOWPHASE|ESP_SHOWMISC|ESP_SHOWTRAC|ESP_SHOWCMDS;*/ - -/*static*/ void espattach(struct device *, struct device *, - void *); -/*static*/ int espprint(void *, const char *); -#ifdef __BROKEN_INDIRECT_CONFIG -/*static*/ int espmatch(struct device *, void *, void *); -#else -/*static*/ int espmatch(struct device *, struct cfdata *, - void *); -#endif -/*static*/ u_int esp_adapter_info(struct esp_softc *); -/*static*/ void espreadregs(struct esp_softc *); -/*static*/ void esp_select(struct esp_softc *, struct esp_ecb *); -/*static*/ int esp_reselect(struct esp_softc *, int); -/*static*/ void esp_scsi_reset(struct esp_softc *); -/*static*/ void esp_reset(struct esp_softc *); -/*static*/ void espinit(struct esp_softc *, int); -/*static*/ int esp_scsi_cmd(struct scsi_xfer *); -/*static*/ int esp_poll(struct esp_softc *, struct scsi_xfer *, - int); -/*static*/ void esp_sched(struct esp_softc *); -/*static*/ void esp_done(struct esp_softc *, struct esp_ecb *); -/*static*/ void esp_msgin(struct esp_softc *); -/*static*/ void esp_msgout(struct esp_softc *); -/*static*/ int espintr(struct esp_softc *); -/*static*/ void esp_timeout(void *arg); -/*static*/ void esp_abort(struct esp_softc *, struct esp_ecb *); -/*static*/ void esp_dequeue(struct esp_softc *, struct esp_ecb *); -void esp_sense(struct esp_softc *, struct esp_ecb *); -void esp_free_ecb(struct esp_softc *, struct esp_ecb *, int); -struct esp_ecb *esp_get_ecb(struct esp_softc *, int); -static inline int esp_stp2cpb(struct esp_softc *, int); -static inline int esp_cpb2stp(struct esp_softc *, int); -static inline void esp_setsync(struct esp_softc *, struct esp_tinfo *); - -/* Linkup to the rest of the kernel */ -struct cfattach asc_ca = { - sizeof(struct esp_softc), espmatch, espattach -}; - -struct cfdriver asc_cd = { - NULL, "asc", DV_DULL -}; - -struct scsi_adapter esp_switch = { - esp_scsi_cmd, - minphys, /* no max at this level; handled by DMA code */ - NULL, - NULL, -}; - -struct scsi_device esp_dev = { - NULL, /* Use default error handler */ - NULL, /* have a queue, served by this */ - NULL, /* have no async handler */ - NULL, /* Use default 'done' routine */ -}; - -/* - * XXX should go when new generic scsiprint finds its way here - */ -int -espprint(aux, name) - void *aux; - const char *name; -{ - if (name != NULL) - printf("scsibus at %s", name); - return UNCONF; -} - -int -#ifdef __BROKEN_INDIRECT_CONFIG -espmatch(parent, vcf, aux) -#else -espmatch(parent, cf, aux) -#endif - struct device *parent; -#ifdef __BROKEN_INDIRECT_CONFIG - void *vcf; -#else - struct cfdata *cf; -#endif - void *aux; -{ -#ifdef SPARC_DRIVER -#ifdef __BROKEN_INDIRECT_CONFIG - struct cfdata *cf = vcf; -#endif - register struct confargs *ca = aux; - register struct romaux *ra = &ca->ca_ra; - - if (strcmp(cf->cf_driver->cd_name, ra->ra_name)) - return (0); - if (ca->ca_bustype == BUS_SBUS) - return (1); - ra->ra_len = NBPG; - return (probeget(ra->ra_vaddr, 1) != -1); -#else - struct tcdsdev_attach_args *tcdsdev = aux; - - if (strncmp(tcdsdev->tcdsda_modname, "PMAZ-AA ", TC_ROM_LLEN)) - return (0); - return (!tc_badaddr(tcdsdev->tcdsda_addr)); -#endif -} - -/* - * Attach this instance, and then all the sub-devices - */ -void -espattach(parent, self, aux) - struct device *parent, *self; - void *aux; -{ -#ifdef SPARC_DRIVER - register struct confargs *ca = aux; -#else - register struct tcdsdev_attach_args *tcdsdev = aux; -#endif - struct esp_softc *sc = (void *)self; -#ifdef SPARC_DRIVER - struct bootpath *bp; - int dmachild = strncmp(parent->dv_xname, "dma", 3) == 0; -#endif - -#ifdef SPARC_DRIVER - /* - * Make sure things are sane. I don't know if this is ever - * necessary, but it seem to be in all of Torek's code. - */ - if (ca->ca_ra.ra_nintr != 1) { - printf(": expected 1 interrupt, got %d\n", ca->ca_ra.ra_nintr); - return; - } - - sc->sc_pri = ca->ca_ra.ra_intr[0].int_pri; - printf(" pri %d", sc->sc_pri); - - /* - * Map my registers in, if they aren't already in virtual - * address space. - */ - if (ca->ca_ra.ra_vaddr) - sc->sc_reg = (volatile u_char *) ca->ca_ra.ra_vaddr; - else { - sc->sc_reg = (volatile u_char *) - mapiodev(ca->ca_ra.ra_reg, 0, ca->ca_ra.ra_len, ca->ca_bustype); - } -#else - sc->sc_reg = (volatile u_int32_t *)tcdsdev->tcdsda_addr; - sc->sc_cookie = tcdsdev->tcdsda_cookie; - sc->sc_dma = tcdsdev->tcdsda_sc; - - printf(": address %p", sc->sc_reg); - tcds_intr_establish(parent, sc->sc_cookie, TC_IPL_BIO, - (int (*)(void *))espintr, sc); -#endif - -#ifdef SPARC_DRIVER - /* Other settings */ - sc->sc_node = ca->ca_ra.ra_node; - if (ca->ca_bustype == BUS_SBUS) { - sc->sc_id = getpropint(sc->sc_node, "initiator-id", 7); - sc->sc_freq = getpropint(sc->sc_node, "clock-frequency", -1); - } else { - sc->sc_id = 7; - sc->sc_freq = 24000000; - } - if (sc->sc_freq < 0) - sc->sc_freq = ((struct sbus_softc *) - sc->sc_dev.dv_parent)->sc_clockfreq; -#else - if (parent->dv_cfdata->cf_driver == &tcds_cd) { - sc->sc_id = tcdsdev->tcdsda_id; - sc->sc_freq = tcdsdev->tcdsda_freq; - } else { - /* XXX */ - sc->sc_id = 7; - sc->sc_freq = 24000000; - } -#endif - - /* gimme Mhz */ - sc->sc_freq /= 1000000; - -#ifdef SPARC_DRIVER - if (dmachild) { - sc->sc_dma = (struct dma_softc *)parent; - sc->sc_dma->sc_esp = sc; - } else { - /* - * find the DMA by poking around the dma device structures - * - * What happens here is that if the dma driver has not been - * configured, then this returns a NULL pointer. Then when the - * dma actually gets configured, it does the opposing test, and - * if the sc->sc_esp field in it's softc is NULL, then tries to - * find the matching esp driver. - * - */ - sc->sc_dma = (struct dma_softc *) - getdevunit("dma", sc->sc_dev.dv_unit); - - /* - * and a back pointer to us, for DMA - */ - if (sc->sc_dma) - sc->sc_dma->sc_esp = sc; - else - panic("espattach: no dma found"); - } -#else - sc->sc_dma->sc_esp = sc; /* XXX */ -#endif - - /* - * It is necessary to try to load the 2nd config register here, - * to find out what rev the esp chip is, else the esp_reset - * will not set up the defaults correctly. - */ - sc->sc_cfg1 = sc->sc_id | ESPCFG1_PARENB; -#ifdef SPARC_DRIVER - sc->sc_cfg2 = ESPCFG2_SCSI2 | ESPCFG2_RPE; - sc->sc_cfg3 = ESPCFG3_CDB; - ESP_WRITE_REG(sc, ESP_CFG2, sc->sc_cfg2); - - if ((ESP_READ_REG(sc, ESP_CFG2) & ~ESPCFG2_RSVD) != (ESPCFG2_SCSI2 | ESPCFG2_RPE)) { - printf(": ESP100"); - sc->sc_rev = ESP100; - } else { - sc->sc_cfg2 = ESPCFG2_SCSI2; - ESP_WRITE_REG(sc, ESP_CFG2, sc->sc_cfg2); - sc->sc_cfg3 = 0; - ESP_WRITE_REG(sc, ESP_CFG3, sc->sc_cfg3); - sc->sc_cfg3 = (ESPCFG3_CDB | ESPCFG3_FCLK); - ESP_WRITE_REG(sc, ESP_CFG3, sc->sc_cfg3); - if (ESP_READ_REG(sc, ESP_CFG3) != (ESPCFG3_CDB | ESPCFG3_FCLK)) { - printf(": ESP100A"); - sc->sc_rev = ESP100A; - } else { - /* ESPCFG2_FE enables > 64K transfers */ - sc->sc_cfg2 |= ESPCFG2_FE; - sc->sc_cfg3 = 0; - ESP_WRITE_REG(sc, ESP_CFG3, sc->sc_cfg3); - printf(": ESP200"); - sc->sc_rev = ESP200; - } - } -#else - sc->sc_cfg2 = ESPCFG2_SCSI2; - sc->sc_cfg3 = 0x4; /* Save residual byte. XXX??? */ - printf(": NCR53C94"); - sc->sc_rev = NCR53C94; -#endif - - /* - * This is the value used to start sync negotiations - * Note that the ESP register "SYNCTP" is programmed - * in "clocks per byte", and has a minimum value of 4. - * The SCSI period used in negotiation is one-fourth - * of the time (in nanoseconds) needed to transfer one byte. - * Since the chip's clock is given in MHz, we have the following - * formula: 4 * period = (1000 / freq) * 4 - */ - sc->sc_minsync = 1000 / sc->sc_freq; - -#ifdef SPARC_DRIVER - /* - * Alas, we must now modify the value a bit, because it's - * only valid when can switch on FASTCLK and FASTSCSI bits - * in config register 3... - */ - switch (sc->sc_rev) { - case ESP100: - sc->sc_maxxfer = 64 * 1024; - sc->sc_minsync = 0; /* No synch on old chip? */ - break; - case ESP100A: - sc->sc_maxxfer = 64 * 1024; - sc->sc_minsync = esp_cpb2stp(sc, 5); /* Min clocks/byte is 5 */ - break; - case ESP200: - sc->sc_maxxfer = 16 * 1024 * 1024; - /* XXX - do actually set FAST* bits */ - } -#else - sc->sc_maxxfer = 64 * 1024; -#endif - - sc->sc_ccf = FREQTOCCF(sc->sc_freq); - - /* The value *must not* be == 1. Make it 2 */ - if (sc->sc_ccf == 1) - sc->sc_ccf = 2; - - /* - * The recommended timeout is 250ms. This register is loaded - * with a value calculated as follows, from the docs: - * - * (timout period) x (CLK frequency) - * reg = ------------------------------------- - * 8192 x (Clock Conversion Factor) - * - * Since CCF has a linear relation to CLK, this generally computes - * to the constant of 153. - */ - sc->sc_timeout = ((250 * 1000) * sc->sc_freq) / (8192 * sc->sc_ccf); - - /* CCF register only has 3 bits; 0 is actually 8 */ - sc->sc_ccf &= 7; - - /* Reset state & bus */ - sc->sc_state = 0; - espinit(sc, 1); - - printf(" %dMhz, target %d\n", sc->sc_freq, sc->sc_id); - -#ifdef SPARC_DRIVER - /* add me to the sbus structures */ - sc->sc_sd.sd_reset = (void *) esp_reset; -#if defined(SUN4C) || defined(SUN4M) - if (ca->ca_bustype == BUS_SBUS) { - if (dmachild) - sbus_establish(&sc->sc_sd, sc->sc_dev.dv_parent); - else - sbus_establish(&sc->sc_sd, &sc->sc_dev); - } -#endif /* SUN4C || SUN4M */ -#endif - -#ifdef SPARC_DRIVER - /* and the interuppts */ - sc->sc_ih.ih_fun = (void *) espintr; - sc->sc_ih.ih_arg = sc; - intr_establish(sc->sc_pri, &sc->sc_ih); - evcnt_attach(&sc->sc_dev, "intr", &sc->sc_intrcnt); -#endif - - /* - * fill in the prototype scsi_link. - */ - /* sc->sc_link.channel = SCSI_CHANNEL_ONLY_ONE; */ - sc->sc_link.adapter_softc = sc; - sc->sc_link.adapter_target = sc->sc_id; - sc->sc_link.adapter = &esp_switch; - sc->sc_link.device = &esp_dev; - sc->sc_link.openings = 2; - - /* - * If the boot path is "esp" at the moment and it's me, then - * walk our pointer to the sub-device, ready for the config - * below. - */ -#ifdef SPARC_DRIVER - bp = ca->ca_ra.ra_bp; - switch (ca->ca_bustype) { - case BUS_SBUS: - if (bp != NULL && strcmp(bp->name, "esp") == 0 && - SAME_ESP(sc, bp, ca)) - bootpath_store(1, bp + 1); - break; - default: - if (bp != NULL && strcmp(bp->name, "esp") == 0 && - bp->val[0] == -1 && bp->val[1] == sc->sc_dev.dv_unit) - bootpath_store(1, bp + 1); - break; - } -#endif - - /* - * Now try to attach all the sub-devices - */ - config_found(self, &sc->sc_link, /* scsiprint */ espprint); /* XXX */ - -#ifdef SPARC_DRIVER - bootpath_store(1, NULL); -#endif -} - -/* - * This is the generic esp reset function. It does not reset the SCSI bus, - * only this controllers, but kills any on-going commands, and also stops - * and resets the DMA. - * - * After reset, registers are loaded with the defaults from the attach - * routine above. - */ -void -esp_reset(sc) - struct esp_softc *sc; -{ - - /* reset DMA first */ - DMA_RESET(sc->sc_dma); - - /* reset SCSI chip */ - ESPCMD(sc, ESPCMD_RSTCHIP); - ESPCMD(sc, ESPCMD_NOP); - DELAY(500); - - /* do these backwards, and fall through */ - switch (sc->sc_rev) { -#ifndef SPARC_DRIVER - case NCR53C94: -#endif - case ESP200: - ESP_WRITE_REG(sc, ESP_CFG3, sc->sc_cfg3); - case ESP100A: - ESP_WRITE_REG(sc, ESP_CFG2, sc->sc_cfg2); - case ESP100: - ESP_WRITE_REG(sc, ESP_CFG1, sc->sc_cfg1); - ESP_WRITE_REG(sc, ESP_CCF, sc->sc_ccf); - ESP_WRITE_REG(sc, ESP_SYNCOFF, 0); - ESP_WRITE_REG(sc, ESP_TIMEOUT, sc->sc_timeout); - break; - default: - printf("%s: unknown revision code, assuming ESP100\n", - sc->sc_dev.dv_xname); - ESP_WRITE_REG(sc, ESP_CFG1, sc->sc_cfg1); - ESP_WRITE_REG(sc, ESP_CCF, sc->sc_ccf); - ESP_WRITE_REG(sc, ESP_SYNCOFF, 0); - ESP_WRITE_REG(sc, ESP_TIMEOUT, sc->sc_timeout); - } -} - -/* - * Reset the SCSI bus, but not the chip - */ -void -esp_scsi_reset(sc) - struct esp_softc *sc; -{ -#ifdef SPARC_DRIVER - /* stop DMA first, as the chip will return to Bus Free phase */ - DMACSR(sc->sc_dma) &= ~D_EN_DMA; -#else - /* - * XXX STOP DMA FIRST - */ -#endif - - printf("esp: resetting SCSI bus\n"); - ESPCMD(sc, ESPCMD_RSTSCSI); -} - -/* - * Initialize esp state machine - */ -void -espinit(sc, doreset) - struct esp_softc *sc; - int doreset; -{ - struct esp_ecb *ecb; - int r; - - ESP_TRACE(("[ESPINIT(%d)] ", doreset)); - - if (sc->sc_state == 0) { - /* First time through; initialize. */ - TAILQ_INIT(&sc->ready_list); - TAILQ_INIT(&sc->nexus_list); - TAILQ_INIT(&sc->free_list); - sc->sc_nexus = NULL; - ecb = sc->sc_ecb; - bzero(ecb, sizeof(sc->sc_ecb)); - for (r = 0; r < sizeof(sc->sc_ecb) / sizeof(*ecb); r++) { - TAILQ_INSERT_TAIL(&sc->free_list, ecb, chain); - ecb++; - } - bzero(sc->sc_tinfo, sizeof(sc->sc_tinfo)); - } else { - /* Cancel any active commands. */ - sc->sc_state = ESP_CLEANING; - if ((ecb = sc->sc_nexus) != NULL) { - ecb->xs->error = XS_DRIVER_STUFFUP; - timeout_del(&ecb->xs->stimeout); - esp_done(sc, ecb); - } - while ((ecb = sc->nexus_list.tqh_first) != NULL) { - ecb->xs->error = XS_DRIVER_STUFFUP; - timeout_del(&ecb->xs->stimeout); - esp_done(sc, ecb); - } - } - - /* - * reset the chip to a known state - */ - esp_reset(sc); - - sc->sc_phase = sc->sc_prevphase = INVALID_PHASE; - for (r = 0; r < 8; r++) { - struct esp_tinfo *ti = &sc->sc_tinfo[r]; -/* XXX - config flags per target: low bits: no reselect; high bits: no synch */ - int fl = sc->sc_dev.dv_cfdata->cf_flags; - - ti->flags = ((sc->sc_minsync && !(fl & (1<<(r+8)))) - ? T_NEGOTIATE : 0) | - ((fl & (1<<r)) ? T_RSELECTOFF : 0) | - T_NEED_TO_RESET; - ti->period = sc->sc_minsync; - ti->offset = 0; - } - - if (doreset) { - sc->sc_state = ESP_SBR; - ESPCMD(sc, ESPCMD_RSTSCSI); - } else { - sc->sc_state = ESP_IDLE; - } -} - -/* - * Read the ESP registers, and save their contents for later use. - * ESP_STAT, ESP_STEP & ESP_INTR are mostly zeroed out when reading - * ESP_INTR - so make sure it is the last read. - * - * I think that (from reading the docs) most bits in these registers - * only make sense when he DMA CSR has an interrupt showing. Call only - * if an interrupt is pending. - */ -void -espreadregs(sc) - struct esp_softc *sc; -{ - - sc->sc_espstat = ESP_READ_REG(sc, ESP_STAT); - /* Only the stepo bits are of interest */ - sc->sc_espstep = ESP_READ_REG(sc, ESP_STEP) & ESPSTEP_MASK; - sc->sc_espintr = ESP_READ_REG(sc, ESP_INTR); -#ifndef SPARC_DRIVER - /* Clear the TCDS interrupt bit. */ - (void)tcds_scsi_isintr(sc->sc_dma, 1); -#endif - - /* - * Determine the SCSI bus phase, return either a real SCSI bus phase - * or some pseudo phase we use to detect certain exceptions. - */ - - sc->sc_phase = (sc->sc_espintr & ESPINTR_DIS) - ? /* Disconnected */ BUSFREE_PHASE - : sc->sc_espstat & ESPSTAT_PHASE; - - ESP_MISC(("regs[intr=%02x,stat=%02x,step=%02x] ", - sc->sc_espintr, sc->sc_espstat, sc->sc_espstep)); -} - -/* - * Convert chip register Clock Per Byte value to Synchronous Transfer Period. - */ -static inline int -esp_cpb2stp(sc, cpb) - struct esp_softc *sc; - int cpb; -{ - return ((250 * cpb) / sc->sc_freq); -} - -/* - * Convert Synchronous Transfer Period to chip register Clock Per Byte value. - */ -static inline int -esp_stp2cpb(sc, period) - struct esp_softc *sc; - int period; -{ - int v; - v = (sc->sc_freq * period) / 250; - if (esp_cpb2stp(sc, v) < period) - /* Correct round-down error */ - v++; - return v; -} - -static inline void -esp_setsync(sc, ti) - struct esp_softc *sc; - struct esp_tinfo *ti; -{ - - if (ti->flags & T_SYNCMODE) { - ESP_WRITE_REG(sc, ESP_SYNCOFF, ti->offset); - ESP_WRITE_REG(sc, ESP_SYNCTP, esp_stp2cpb(sc, ti->period)); - } else { - ESP_WRITE_REG(sc, ESP_SYNCOFF, 0); - ESP_WRITE_REG(sc, ESP_SYNCTP, 0); - } -} - -/* - * Send a command to a target, set the driver state to ESP_SELECTING - * and let the caller take care of the rest. - * - * Keeping this as a function allows me to say that this may be done - * by DMA instead of programmed I/O soon. - */ -void -esp_select(sc, ecb) - struct esp_softc *sc; - struct esp_ecb *ecb; -{ - struct scsi_link *sc_link = ecb->xs->sc_link; - int target = sc_link->target; - struct esp_tinfo *ti = &sc->sc_tinfo[target]; - u_char *cmd; - int clen; - - ESP_TRACE(("[esp_select(t%d,l%d,cmd:%x)] ", sc_link->target, sc_link->lun, ecb->cmd.opcode)); - - /* new state ESP_SELECTING */ - sc->sc_state = ESP_SELECTING; - - ESPCMD(sc, ESPCMD_FLUSH); - - /* - * The docs say the target register is never reset, and I - * can't think of a better place to set it - */ - ESP_WRITE_REG(sc, ESP_SELID, target); - esp_setsync(sc, ti); - - /* - * Who am I. This is where we tell the target that we are - * happy for it to disconnect etc. - */ - ESP_WRITE_REG(sc, ESP_FIFO, - MSG_IDENTIFY(sc_link->lun, (ti->flags & T_RSELECTOFF)?0:1)); - - if (ti->flags & T_NEGOTIATE) { - /* Arbitrate, select and stop after IDENTIFY message */ - ESPCMD(sc, ESPCMD_SELATNS); - return; - } - - /* Now the command into the FIFO */ - cmd = (u_char *)&ecb->cmd; - clen = ecb->clen; - while (clen--) - ESP_WRITE_REG(sc, ESP_FIFO, *cmd++); - - /* And get the targets attention */ - ESPCMD(sc, ESPCMD_SELATN); -} - -void -esp_free_ecb(sc, ecb, flags) - struct esp_softc *sc; - struct esp_ecb *ecb; - int flags; -{ - int s; - - s = splbio(); - - ecb->flags = 0; - TAILQ_INSERT_HEAD(&sc->free_list, ecb, chain); - - /* - * If there were none, wake anybody waiting for one to come free, - * starting with queued entries. - */ - if (ecb->chain.tqe_next == 0) - wakeup(&sc->free_list); - - splx(s); -} - -struct esp_ecb * -esp_get_ecb(sc, flags) - struct esp_softc *sc; - int flags; -{ - struct esp_ecb *ecb; - int s; - - s = splbio(); - - while ((ecb = sc->free_list.tqh_first) == NULL && - (flags & SCSI_NOSLEEP) == 0) - tsleep(&sc->free_list, PRIBIO, "especb", 0); - if (ecb) { - TAILQ_REMOVE(&sc->free_list, ecb, chain); - ecb->flags |= ECB_ALLOC; - } - - splx(s); - return ecb; -} - -/* - * DRIVER FUNCTIONS CALLABLE FROM HIGHER LEVEL DRIVERS - */ - -/* - * Start a SCSI-command - * This function is called by the higher level SCSI-driver to queue/run - * SCSI-commands. - */ -int -esp_scsi_cmd(xs) - struct scsi_xfer *xs; -{ - struct scsi_link *sc_link = xs->sc_link; - struct esp_softc *sc = sc_link->adapter_softc; - struct esp_ecb *ecb; - int s, flags; - - ESP_TRACE(("[esp_scsi_cmd] ")); - ESP_CMDS(("[0x%x, %d]->%d ", (int)xs->cmd->opcode, xs->cmdlen, - sc_link->target)); - - flags = xs->flags; - if ((ecb = esp_get_ecb(sc, flags)) == NULL) { - xs->error = XS_DRIVER_STUFFUP; - return TRY_AGAIN_LATER; - } - - /* Initialize ecb */ - ecb->xs = xs; - ecb->timeout = xs->timeout; - timeout_set(&ecb->xs->stimeout, esp_timeout, ecb); - - if (xs->flags & SCSI_RESET) { - ecb->flags |= ECB_RESET; - ecb->clen = 0; - ecb->dleft = 0; - } else { - bcopy(xs->cmd, &ecb->cmd, xs->cmdlen); - ecb->clen = xs->cmdlen; - ecb->daddr = xs->data; - ecb->dleft = xs->datalen; - } - ecb->stat = 0; - - s = splbio(); - - TAILQ_INSERT_TAIL(&sc->ready_list, ecb, chain); - if (sc->sc_state == ESP_IDLE) - esp_sched(sc); - - splx(s); - - if ((flags & SCSI_POLL) == 0) - return SUCCESSFULLY_QUEUED; - - /* Not allowed to use interrupts, use polling instead */ - if (esp_poll(sc, xs, ecb->timeout)) { - esp_timeout(ecb); - if (esp_poll(sc, xs, ecb->timeout)) - esp_timeout(ecb); - } - return COMPLETE; -} - -/* - * Used when interrupt driven I/O isn't allowed, e.g. during boot. - */ -int -esp_poll(sc, xs, count) - struct esp_softc *sc; - struct scsi_xfer *xs; - int count; -{ - - ESP_TRACE(("[esp_poll] ")); - while (count) { - if (DMA_ISINTR(sc->sc_dma)) { - espintr(sc); - } -#if alternatively - if (ESP_READ_REG(sc, ESP_STAT) & ESPSTAT_INT) - espintr(sc); -#endif - if ((xs->flags & ITSDONE) != 0) - return 0; - if (sc->sc_state == ESP_IDLE) { - ESP_TRACE(("[esp_poll: rescheduling] ")); - esp_sched(sc); - } - DELAY(1000); - count--; - } - return 1; -} - - -/* - * LOW LEVEL SCSI UTILITIES - */ - -/* - * Schedule a scsi operation. This has now been pulled out of the interrupt - * handler so that we may call it from esp_scsi_cmd and esp_done. This may - * save us an unecessary interrupt just to get things going. Should only be - * called when state == ESP_IDLE and at bio pl. - */ -void -esp_sched(sc) - struct esp_softc *sc; -{ - struct esp_ecb *ecb; - struct scsi_link *sc_link; - struct esp_tinfo *ti; - - ESP_TRACE(("[esp_sched] ")); - if (sc->sc_state != ESP_IDLE) - panic("esp_sched: not IDLE (state=%d)", sc->sc_state); - - /* - * Find first ecb in ready queue that is for a target/lunit - * combinations that is not busy. - */ - for (ecb = sc->ready_list.tqh_first; ecb; ecb = ecb->chain.tqe_next) { - sc_link = ecb->xs->sc_link; - ti = &sc->sc_tinfo[sc_link->target]; - if ((ti->lubusy & (1 << sc_link->lun)) == 0) { - TAILQ_REMOVE(&sc->ready_list, ecb, chain); - sc->sc_nexus = ecb; - esp_select(sc, ecb); - break; - } else - ESP_MISC(("%d:%d busy\n", - sc_link->target, sc_link->lun)); - } -} - -void -esp_sense(sc, ecb) - struct esp_softc *sc; - struct esp_ecb *ecb; -{ - struct scsi_xfer *xs = ecb->xs; - struct scsi_link *sc_link = xs->sc_link; - struct esp_tinfo *ti = &sc->sc_tinfo[sc_link->target]; - struct scsi_sense *ss = (void *)&ecb->cmd; - - ESP_MISC(("requesting sense ")); - /* Next, setup a request sense command block */ - bzero(ss, sizeof(*ss)); - ss->opcode = REQUEST_SENSE; - ss->byte2 = sc_link->lun << 5; - ss->length = sizeof(struct scsi_sense_data); - ecb->clen = sizeof(*ss); - ecb->daddr = (char *)&xs->sense; - ecb->dleft = sizeof(struct scsi_sense_data); - ecb->flags |= ECB_SENSE; - ti->senses++; - if (ecb->flags & ECB_NEXUS) - ti->lubusy &= ~(1 << sc_link->lun); - if (ecb == sc->sc_nexus) { - esp_select(sc, ecb); - } else { - esp_dequeue(sc, ecb); - TAILQ_INSERT_HEAD(&sc->ready_list, ecb, chain); - if (sc->sc_state == ESP_IDLE) - esp_sched(sc); - } -} - -/* - * POST PROCESSING OF SCSI_CMD (usually current) - */ -void -esp_done(sc, ecb) - struct esp_softc *sc; - struct esp_ecb *ecb; -{ - struct scsi_xfer *xs = ecb->xs; - struct scsi_link *sc_link = xs->sc_link; - struct esp_tinfo *ti = &sc->sc_tinfo[sc_link->target]; - - ESP_TRACE(("[esp_done(error:%x)] ", xs->error)); - - /* - * Now, if we've come here with no error code, i.e. we've kept the - * initial XS_NOERROR, and the status code signals that we should - * check sense, we'll need to set up a request sense cmd block and - * push the command back into the ready queue *before* any other - * commands for this target/lunit, else we lose the sense info. - * We don't support chk sense conditions for the request sense cmd. - */ - if (xs->error == XS_NOERROR) { - if ((ecb->flags & ECB_ABORT) != 0) { - xs->error = XS_DRIVER_STUFFUP; - } else if ((ecb->flags & ECB_SENSE) != 0) { - xs->error = XS_SENSE; - } else if ((ecb->stat & ST_MASK) == SCSI_CHECK) { - /* First, save the return values */ - xs->resid = ecb->dleft; - xs->status = ecb->stat; - esp_sense(sc, ecb); - return; - } else { - xs->resid = ecb->dleft; - } - } - - xs->flags |= ITSDONE; - -#ifdef ESP_DEBUG - if (esp_debug & ESP_SHOWMISC) { - if (xs->resid != 0) - printf("resid=%lu ", xs->resid); - if (xs->error == XS_SENSE) - printf("sense=0x%02x\n", xs->sense.error_code); - else - printf("error=%d\n", xs->error); - } -#endif - - /* - * Remove the ECB from whatever queue it's on. - */ - if (ecb->flags & ECB_NEXUS) - ti->lubusy &= ~(1 << sc_link->lun); - if (ecb == sc->sc_nexus) { - sc->sc_nexus = NULL; - sc->sc_state = ESP_IDLE; - esp_sched(sc); - } else - esp_dequeue(sc, ecb); - - esp_free_ecb(sc, ecb, xs->flags); - ti->cmds++; - scsi_done(xs); -} - -void -esp_dequeue(sc, ecb) - struct esp_softc *sc; - struct esp_ecb *ecb; -{ - - if (ecb->flags & ECB_NEXUS) { - TAILQ_REMOVE(&sc->nexus_list, ecb, chain); - } else { - TAILQ_REMOVE(&sc->ready_list, ecb, chain); - } -} - -/* - * INTERRUPT/PROTOCOL ENGINE - */ - -/* - * Schedule an outgoing message by prioritizing it, and asserting - * attention on the bus. We can only do this when we are the initiator - * else there will be an illegal command interrupt. - */ -#define esp_sched_msgout(m) \ - do { \ - ESP_MISC(("esp_sched_msgout %d ", m)); \ - ESPCMD(sc, ESPCMD_SETATN); \ - sc->sc_flags |= ESP_ATN; \ - sc->sc_msgpriq |= (m); \ - } while (0) - -int -esp_reselect(sc, message) - struct esp_softc *sc; - int message; -{ - u_char selid, target, lun; - struct esp_ecb *ecb; - struct scsi_link *sc_link; - struct esp_tinfo *ti; - - /* - * The SCSI chip made a snapshot of the data bus while the reselection - * was being negotiated. This enables us to determine which target did - * the reselect. - */ - selid = sc->sc_selid & ~(1 << sc->sc_id); - if (selid & (selid - 1)) { - printf("%s: reselect with invalid selid %02x; sending DEVICE RESET\n", - sc->sc_dev.dv_xname, selid); - goto reset; - } - - /* - * Search wait queue for disconnected cmd - * The list should be short, so I haven't bothered with - * any more sophisticated structures than a simple - * singly linked list. - */ - target = ffs(selid) - 1; - lun = message & 0x07; - for (ecb = sc->nexus_list.tqh_first; ecb != NULL; - ecb = ecb->chain.tqe_next) { - sc_link = ecb->xs->sc_link; - if (sc_link->target == target && sc_link->lun == lun) - break; - } - if (ecb == NULL) { - printf("%s: reselect from target %d lun %d with no nexus; sending ABORT\n", - sc->sc_dev.dv_xname, target, lun); - goto abort; - } - - /* Make this nexus active again. */ - TAILQ_REMOVE(&sc->nexus_list, ecb, chain); - sc->sc_state = ESP_CONNECTED; - sc->sc_nexus = ecb; - ti = &sc->sc_tinfo[target]; - ti->lubusy |= (1 << lun); - esp_setsync(sc, ti); - - if (ecb->flags & ECB_RESET) - esp_sched_msgout(SEND_DEV_RESET); - else if (ecb->flags & ECB_ABORT) - esp_sched_msgout(SEND_ABORT); - - /* Do an implicit RESTORE POINTERS. */ - sc->sc_dp = ecb->daddr; - sc->sc_dleft = ecb->dleft; - - return (0); - -reset: - esp_sched_msgout(SEND_DEV_RESET); - return (1); - -abort: - esp_sched_msgout(SEND_ABORT); - return (1); -} - -#define IS1BYTEMSG(m) (((m) != 1 && (m) < 0x20) || (m) & 0x80) -#define IS2BYTEMSG(m) (((m) & 0xf0) == 0x20) -#define ISEXTMSG(m) ((m) == 1) - -/* - * Get an incoming message as initiator. - * - * The SCSI bus must already be in MESSAGE_IN_PHASE and there is a - * byte in the FIFO - */ -void -esp_msgin(sc) - register struct esp_softc *sc; -{ - register int v; - - ESP_TRACE(("[esp_msgin(curmsglen:%ld)] ", (long)sc->sc_imlen)); - - if ((ESP_READ_REG(sc, ESP_FFLAG) & ESPFIFO_FF) == 0) { - printf("%s: msgin: no msg byte available\n", - sc->sc_dev.dv_xname); - return; - } - - /* - * Prepare for a new message. A message should (according - * to the SCSI standard) be transmitted in one single - * MESSAGE_IN_PHASE. If we have been in some other phase, - * then this is a new message. - */ - if (sc->sc_prevphase != MESSAGE_IN_PHASE) { - sc->sc_flags &= ~ESP_DROP_MSGI; - sc->sc_imlen = 0; - } - - v = ESP_READ_REG(sc, ESP_FIFO); - ESP_MISC(("<msgbyte:0x%02x>", v)); - -#if 0 - if (sc->sc_state == ESP_RESELECTED && sc->sc_imlen == 0) { - /* - * Which target is reselecting us? (The ID bit really) - */ - sc->sc_selid = v; - ESP_MISC(("selid=0x%2x ", sc->sc_selid)); - return; - } -#endif - - sc->sc_imess[sc->sc_imlen] = v; - - /* - * If we're going to reject the message, don't bother storing - * the incoming bytes. But still, we need to ACK them. - */ - - if ((sc->sc_flags & ESP_DROP_MSGI)) { - ESPCMD(sc, ESPCMD_MSGOK); - printf("<dropping msg byte %x>", - sc->sc_imess[sc->sc_imlen]); - return; - } - - if (sc->sc_imlen >= ESP_MAX_MSG_LEN) { - esp_sched_msgout(SEND_REJECT); - sc->sc_flags |= ESP_DROP_MSGI; - } else { - sc->sc_imlen++; - /* - * This testing is suboptimal, but most - * messages will be of the one byte variety, so - * it should not effect performance - * significantly. - */ - if (sc->sc_imlen == 1 && IS1BYTEMSG(sc->sc_imess[0])) - goto gotit; - if (sc->sc_imlen == 2 && IS2BYTEMSG(sc->sc_imess[0])) - goto gotit; - if (sc->sc_imlen >= 3 && ISEXTMSG(sc->sc_imess[0]) && - sc->sc_imlen == sc->sc_imess[1] + 2) - goto gotit; - } - /* Ack what we have so far */ - ESPCMD(sc, ESPCMD_MSGOK); - return; - -gotit: - ESP_MSGS(("gotmsg(%x)", sc->sc_imess[0])); - /* - * Now we should have a complete message (1 byte, 2 byte - * and moderately long extended messages). We only handle - * extended messages which total length is shorter than - * ESP_MAX_MSG_LEN. Longer messages will be amputated. - */ - switch (sc->sc_state) { - struct esp_ecb *ecb; - struct esp_tinfo *ti; - - case ESP_CONNECTED: - ecb = sc->sc_nexus; - ti = &sc->sc_tinfo[ecb->xs->sc_link->target]; - - switch (sc->sc_imess[0]) { - case MSG_CMDCOMPLETE: - ESP_MSGS(("cmdcomplete ")); - if (sc->sc_dleft < 0) { - struct scsi_link *sc_link = ecb->xs->sc_link; - printf("%s: %ld extra bytes from %d:%d\n", - sc->sc_dev.dv_xname, -(long)sc->sc_dleft, - sc_link->target, sc_link->lun); - sc->sc_dleft = 0; - } - ecb->xs->resid = ecb->dleft = sc->sc_dleft; - sc->sc_state = ESP_CMDCOMPLETE; - break; - - case MSG_MESSAGE_REJECT: - if (esp_debug & ESP_SHOWMSGS) - printf("%s: our msg rejected by target\n", - sc->sc_dev.dv_xname); - switch (sc->sc_msgout) { - case SEND_SDTR: - sc->sc_flags &= ~ESP_SYNCHNEGO; - ti->flags &= ~(T_NEGOTIATE | T_SYNCMODE); - esp_setsync(sc, ti); - break; - case SEND_INIT_DET_ERR: - goto abort; - } - break; - - case MSG_NOOP: - ESP_MSGS(("noop ")); - break; - - case MSG_DISCONNECT: - ESP_MSGS(("disconnect ")); - ti->dconns++; - sc->sc_state = ESP_DISCONNECT; - if ((ecb->xs->sc_link->quirks & SDEV_AUTOSAVE) == 0) - break; - /*FALLTHROUGH*/ - - case MSG_SAVEDATAPOINTER: - ESP_MSGS(("save datapointer ")); - ecb->daddr = sc->sc_dp; - ecb->dleft = sc->sc_dleft; - break; - - case MSG_RESTOREPOINTERS: - ESP_MSGS(("restore datapointer ")); - sc->sc_dp = ecb->daddr; - sc->sc_dleft = ecb->dleft; - break; - - case MSG_EXTENDED: - ESP_MSGS(("extended(%x) ", sc->sc_imess[2])); - switch (sc->sc_imess[2]) { - case MSG_EXT_SDTR: - ESP_MSGS(("SDTR period %d, offset %d ", - sc->sc_imess[3], sc->sc_imess[4])); - if (sc->sc_imess[1] != 3) - goto reject; - ti->period = sc->sc_imess[3]; - ti->offset = sc->sc_imess[4]; - ti->flags &= ~T_NEGOTIATE; - if (sc->sc_minsync == 0 || - ti->offset == 0 || - ti->period > 124) { - printf("%s:%d: async\n", "esp", - ecb->xs->sc_link->target); - if ((sc->sc_flags&ESP_SYNCHNEGO) == 0) { - /* target initiated negotiation */ - ti->offset = 0; - ti->flags &= ~T_SYNCMODE; - esp_sched_msgout(SEND_SDTR); - } else { - /* we are async */ - ti->flags &= ~T_SYNCMODE; - } - } else { - int r = 250/ti->period; - int s = (100*250)/ti->period - 100*r; - int p; - - p = esp_stp2cpb(sc, ti->period); - ti->period = esp_cpb2stp(sc, p); -#ifdef ESP_DEBUG - sc_print_addr(ecb->xs->sc_link); - printf("max sync rate %d.%02dMb/s\n", - r, s); -#endif - if ((sc->sc_flags&ESP_SYNCHNEGO) == 0) { - /* target initiated negotiation */ - if (ti->period < sc->sc_minsync) - ti->period = sc->sc_minsync; - if (ti->offset > 15) - ti->offset = 15; - ti->flags &= ~T_SYNCMODE; - esp_sched_msgout(SEND_SDTR); - } else { - /* we are sync */ - ti->flags |= T_SYNCMODE; - } - } - sc->sc_flags &= ~ESP_SYNCHNEGO; - esp_setsync(sc, ti); - break; - - default: - printf("%s: unrecognized MESSAGE EXTENDED; sending REJECT\n", - sc->sc_dev.dv_xname); - goto reject; - } - break; - - default: - ESP_MSGS(("ident ")); - printf("%s: unrecognized MESSAGE; sending REJECT\n", - sc->sc_dev.dv_xname); - reject: - esp_sched_msgout(SEND_REJECT); - break; - } - break; - - case ESP_RESELECTED: - if (!MSG_ISIDENTIFY(sc->sc_imess[0])) { - printf("%s: reselect without IDENTIFY; sending DEVICE RESET\n", - sc->sc_dev.dv_xname); - goto reset; - } - - (void) esp_reselect(sc, sc->sc_imess[0]); - break; - - default: - printf("%s: unexpected MESSAGE IN; sending DEVICE RESET\n", - sc->sc_dev.dv_xname); - reset: - esp_sched_msgout(SEND_DEV_RESET); - break; - - abort: - esp_sched_msgout(SEND_ABORT); - break; - } - - /* Ack last message byte */ - ESPCMD(sc, ESPCMD_MSGOK); - - /* Done, reset message pointer. */ - sc->sc_flags &= ~ESP_DROP_MSGI; - sc->sc_imlen = 0; -} - - -/* - * Send the highest priority, scheduled message - */ -void -esp_msgout(sc) - register struct esp_softc *sc; -{ - struct esp_tinfo *ti; - struct esp_ecb *ecb; - size_t size; - - ESP_TRACE(("[esp_msgout(priq:%x, prevphase:%x)]", sc->sc_msgpriq, sc->sc_prevphase)); - - if (sc->sc_flags & ESP_ATN) { - if (sc->sc_prevphase != MESSAGE_OUT_PHASE) { - new: - ESPCMD(sc, ESPCMD_FLUSH); - DELAY(1); - sc->sc_msgoutq = 0; - sc->sc_omlen = 0; - } - } else { - if (sc->sc_prevphase == MESSAGE_OUT_PHASE) { - esp_sched_msgout(sc->sc_msgoutq); - goto new; - } else { - printf("esp at line %d: unexpected MESSAGE OUT phase\n", __LINE__); - } - } - - if (sc->sc_omlen == 0) { - /* Pick up highest priority message */ - sc->sc_msgout = sc->sc_msgpriq & -sc->sc_msgpriq; - sc->sc_msgoutq |= sc->sc_msgout; - sc->sc_msgpriq &= ~sc->sc_msgout; - sc->sc_omlen = 1; /* "Default" message len */ - switch (sc->sc_msgout) { - case SEND_SDTR: - ecb = sc->sc_nexus; - ti = &sc->sc_tinfo[ecb->xs->sc_link->target]; - sc->sc_omess[0] = MSG_EXTENDED; - sc->sc_omess[1] = 3; - sc->sc_omess[2] = MSG_EXT_SDTR; - sc->sc_omess[3] = ti->period; - sc->sc_omess[4] = ti->offset; - sc->sc_omlen = 5; - if ((sc->sc_flags & ESP_SYNCHNEGO) == 0) { - ti->flags |= T_SYNCMODE; - esp_setsync(sc, ti); - } - break; - case SEND_IDENTIFY: - if (sc->sc_state != ESP_CONNECTED) { - printf("esp at line %d: no nexus\n", __LINE__); - } - ecb = sc->sc_nexus; - sc->sc_omess[0] = MSG_IDENTIFY(ecb->xs->sc_link->lun,0); - break; - case SEND_DEV_RESET: - sc->sc_flags |= ESP_ABORTING; - sc->sc_omess[0] = MSG_BUS_DEV_RESET; - ecb = sc->sc_nexus; - ti = &sc->sc_tinfo[ecb->xs->sc_link->target]; - ti->flags &= ~T_SYNCMODE; - ti->flags |= T_NEGOTIATE; - break; - case SEND_PARITY_ERROR: - sc->sc_omess[0] = MSG_PARITY_ERROR; - break; - case SEND_ABORT: - sc->sc_flags |= ESP_ABORTING; - sc->sc_omess[0] = MSG_ABORT; - break; - case SEND_INIT_DET_ERR: - sc->sc_omess[0] = MSG_INITIATOR_DET_ERR; - break; - case SEND_REJECT: - sc->sc_omess[0] = MSG_MESSAGE_REJECT; - break; - default: - ESPCMD(sc, ESPCMD_RSTATN); - sc->sc_flags &= ~ESP_ATN; - sc->sc_omess[0] = MSG_NOOP; - break; - } - sc->sc_omp = sc->sc_omess; - } - -#if 1 - /* (re)send the message */ - size = min(sc->sc_omlen, sc->sc_maxxfer); - DMA_SETUP(sc->sc_dma, &sc->sc_omp, &sc->sc_omlen, 0, &size); - /* Program the SCSI counter */ - ESP_WRITE_REG(sc, ESP_TCL, size); - ESP_WRITE_REG(sc, ESP_TCM, size >> 8); - if (sc->sc_cfg2 & ESPCFG2_FE) { - ESP_WRITE_REG(sc, ESP_TCH, size >> 16); - } - /* load the count in */ - ESPCMD(sc, ESPCMD_NOP|ESPCMD_DMA); - ESPCMD(sc, ESPCMD_TRANS|ESPCMD_DMA); - DMA_GO(sc->sc_dma); -#else - { int i; - for (i = 0; i < sc->sc_omlen; i++) - ESP_WRITE_REG(sc, FIFO, sc->sc_omess[i]); - ESPCMD(sc, ESPCMD_TRANS); - sc->sc_omlen = 0; - } -#endif -} - -/* - * This is the most critical part of the driver, and has to know - * how to deal with *all* error conditions and phases from the SCSI - * bus. If there are no errors and the DMA was active, then call the - * DMA pseudo-interrupt handler. If this returns 1, then that was it - * and we can return from here without further processing. - * - * Most of this needs verifying. - */ -int -espintr(sc) - register struct esp_softc *sc; -{ - register struct esp_ecb *ecb; - register struct scsi_link *sc_link; - struct esp_tinfo *ti; - int loop; - size_t size; - - ESP_TRACE(("[espintr]")); - - /* - * I have made some (maybe seriously flawed) assumptions here, - * but basic testing (uncomment the printf() below), show that - * certainly something happens when this loop is here. - * - * The idea is that many of the SCSI operations take very little - * time, and going away and getting interrupted is too high an - * overhead to pay. For example, selecting, sending a message - * and command and then doing some work can be done in one "pass". - * - * The DELAY is not variable because I do not understand that the - * DELAY loop should be fixed-time regardless of CPU speed, but - * I am *assuming* that the faster SCSI processors get things done - * quicker (sending a command byte etc), and so there is no - * need to be too slow. - * - * This is a heuristic. It is 2 when at 20Mhz, 2 at 25Mhz and 1 - * at 40Mhz. This needs testing. - */ - for (loop = 0; 1;loop++, DELAY(50/sc->sc_freq)) { - /* a feeling of deja-vu */ - if (!DMA_ISINTR(sc->sc_dma)) - return (loop != 0); -#if 0 - if (loop) - printf("*"); -#endif - - /* and what do the registers say... */ - espreadregs(sc); - - sc->sc_intrcnt.ev_count++; - - /* - * At the moment, only a SCSI Bus Reset or Illegal - * Command are classed as errors. A disconnect is a - * valid condition, and we let the code check is the - * "ESP_BUSFREE_OK" flag was set before declaring it - * and error. - * - * Also, the status register tells us about "Gross - * Errors" and "Parity errors". Only the Gross Error - * is really bad, and the parity errors are dealt - * with later - * - * TODO - * If there are too many parity error, go to slow - * cable mode ? - */ - - /* SCSI Reset */ - if (sc->sc_espintr & ESPINTR_SBR) { - if (ESP_READ_REG(sc, ESP_FFLAG) & ESPFIFO_FF) { - ESPCMD(sc, ESPCMD_FLUSH); - DELAY(1); - } - if (sc->sc_state != ESP_SBR) { - printf("%s: SCSI bus reset\n", - sc->sc_dev.dv_xname); - espinit(sc, 0); /* Restart everything */ - return 1; - } -#if 0 - /*XXX*/ printf("<expected bus reset: " - "[intr %x, stat %x, step %d]>\n", - sc->sc_espintr, sc->sc_espstat, - sc->sc_espstep); -#endif - if (sc->sc_nexus) - panic("%s: nexus in reset state", - sc->sc_dev.dv_xname); - goto sched; - } - - ecb = sc->sc_nexus; - -#define ESPINTR_ERR (ESPINTR_SBR|ESPINTR_ILL) - if (sc->sc_espintr & ESPINTR_ERR || - sc->sc_espstat & ESPSTAT_GE) { - - if (sc->sc_espstat & ESPSTAT_GE) { - /* no target ? */ - if (ESP_READ_REG(sc, ESP_FFLAG) & ESPFIFO_FF) { - ESPCMD(sc, ESPCMD_FLUSH); - DELAY(1); - } - if (sc->sc_state == ESP_CONNECTED || - sc->sc_state == ESP_SELECTING) { - ecb->xs->error = XS_DRIVER_STUFFUP; - esp_done(sc, ecb); - } - return 1; - } - - if (sc->sc_espintr & ESPINTR_ILL) { - /* illegal command, out of sync ? */ - printf("%s: illegal command: 0x%x (state %d, phase %x, prevphase %x)\n", - sc->sc_dev.dv_xname, sc->sc_lastcmd, - sc->sc_state, sc->sc_phase, - sc->sc_prevphase); - if (ESP_READ_REG(sc, ESP_FFLAG) & ESPFIFO_FF) { - ESPCMD(sc, ESPCMD_FLUSH); - DELAY(1); - } - espinit(sc, 0); /* Restart everything */ - return 1; - } - } - - /* - * Call if DMA is active. - * - * If DMA_INTR returns true, then maybe go 'round the loop - * again in case there is no more DMA queued, but a phase - * change is expected. - */ - if (DMA_ISACTIVE(sc->sc_dma)) { - int r = DMA_INTR(sc->sc_dma); - if (r == -1) { - printf("%s: DMA error; resetting\n", - sc->sc_dev.dv_xname); - espinit(sc, 1); - } - /* If DMA active here, then go back to work... */ - if (DMA_ISACTIVE(sc->sc_dma)) - return 1; - - if (sc->sc_dleft == 0 && - (sc->sc_espstat & ESPSTAT_TC) == 0) - printf("%s: !TC [intr %x, stat %x, step %d]" - " prevphase %x, resid %lx\n", - sc->sc_dev.dv_xname, - sc->sc_espintr, - sc->sc_espstat, - sc->sc_espstep, - sc->sc_prevphase, - ecb?ecb->dleft:-1); - } - -#if 0 /* Unreliable on some ESP revisions? */ - if ((sc->sc_espstat & ESPSTAT_INT) == 0) { - printf("%s: spurious interrupt\n", sc->sc_dev.dv_xname); - return 1; - } -#endif - - /* - * check for less serious errors - */ - if (sc->sc_espstat & ESPSTAT_PE) { - printf("%s: SCSI bus parity error\n", - sc->sc_dev.dv_xname); - if (sc->sc_prevphase == MESSAGE_IN_PHASE) - esp_sched_msgout(SEND_PARITY_ERROR); - else - esp_sched_msgout(SEND_INIT_DET_ERR); - } - - if (sc->sc_espintr & ESPINTR_DIS) { - ESP_MISC(("<DISC [intr %x, stat %x, step %d]>", - sc->sc_espintr,sc->sc_espstat,sc->sc_espstep)); - if (ESP_READ_REG(sc, ESP_FFLAG) & ESPFIFO_FF) { - ESPCMD(sc, ESPCMD_FLUSH); - DELAY(1); - } - /* - * This command must (apparently) be issued within - * 250mS of a disconnect. So here you are... - */ - ESPCMD(sc, ESPCMD_ENSEL); - switch (sc->sc_state) { - case ESP_RESELECTED: - goto sched; - - case ESP_SELECTING: - ecb->xs->error = XS_SELTIMEOUT; - goto finish; - - case ESP_CONNECTED: - if ((sc->sc_flags & ESP_SYNCHNEGO)) { -#ifdef ESP_DEBUG - if (ecb) - sc_print_addr(ecb->xs->sc_link); - printf("sync nego not completed!\n"); -#endif - ti = &sc->sc_tinfo[ecb->xs->sc_link->target]; - sc->sc_flags &= ~ESP_SYNCHNEGO; - ti->flags &= ~(T_NEGOTIATE | T_SYNCMODE); - } - - /* it may be OK to disconnect */ - if ((sc->sc_flags & ESP_ABORTING) == 0) { - /* - * Section 5.1.1 of the SCSI 2 spec - * suggests issuing a REQUEST SENSE - * following an unexpected disconnect. - * Some devices go into a contingent - * allegiance condition when - * disconnecting, and this is necessary - * to clean up their state. - */ - printf("%s: unexpected disconnect; ", - sc->sc_dev.dv_xname); - if (ecb->flags & ECB_SENSE) { - printf("resetting\n"); - goto reset; - } - printf("sending REQUEST SENSE\n"); - esp_sense(sc, ecb); - goto out; - } - - ecb->xs->error = XS_DRIVER_STUFFUP; - goto finish; - - case ESP_DISCONNECT: - TAILQ_INSERT_HEAD(&sc->nexus_list, ecb, chain); - sc->sc_nexus = NULL; - goto sched; - - case ESP_CMDCOMPLETE: - goto finish; - } - } - - switch (sc->sc_state) { - - case ESP_SBR: - printf("%s: waiting for SCSI Bus Reset to happen\n", - sc->sc_dev.dv_xname); - return 1; - - case ESP_RESELECTED: - /* - * we must be continuing a message ? - */ - if (sc->sc_phase != MESSAGE_IN_PHASE) { - printf("%s: target didn't identify\n", - sc->sc_dev.dv_xname); - espinit(sc, 1); - return 1; - } -printf("<<RESELECT CONT'd>>"); -#if XXXX - esp_msgin(sc); - if (sc->sc_state != ESP_CONNECTED) { - /* IDENTIFY fail?! */ - printf("%s: identify failed\n", - sc->sc_dev.dv_xname); - espinit(sc, 1); - return 1; - } -#endif - break; - - case ESP_IDLE: -if (sc->sc_flags & ESP_ICCS) printf("[[esp: BUMMER]]"); - case ESP_SELECTING: - sc->sc_msgpriq = sc->sc_msgout = sc->sc_msgoutq = 0; - sc->sc_flags = 0; - - if (sc->sc_espintr & ESPINTR_RESEL) { - /* - * If we're trying to select a - * target ourselves, push our command - * back into the ready list. - */ - if (sc->sc_state == ESP_SELECTING) { - ESP_MISC(("backoff selector ")); - sc_link = sc->sc_nexus->xs->sc_link; - ti = &sc->sc_tinfo[sc_link->target]; - TAILQ_INSERT_HEAD(&sc->ready_list, - sc->sc_nexus, chain); - ecb = sc->sc_nexus = NULL; - } - sc->sc_state = ESP_RESELECTED; - if (sc->sc_phase != MESSAGE_IN_PHASE) { - /* - * Things are seriously fucked up. - * Pull the brakes, i.e. reset - */ - printf("%s: target didn't identify\n", - sc->sc_dev.dv_xname); - espinit(sc, 1); - return 1; - } - if ((ESP_READ_REG(sc, ESP_FFLAG) & ESPFIFO_FF) != 2) { - printf("%s: RESELECT: %d bytes in FIFO!\n", - sc->sc_dev.dv_xname, - ESP_READ_REG(sc, ESP_FFLAG) & - ESPFIFO_FF); - espinit(sc, 1); - return 1; - } - sc->sc_selid = ESP_READ_REG(sc, ESP_FIFO); - ESP_MISC(("selid=0x%2x ", sc->sc_selid)); - esp_msgin(sc); /* Handle identify message */ - if (sc->sc_state != ESP_CONNECTED) { - /* IDENTIFY fail?! */ - printf("%s: identify failed\n", - sc->sc_dev.dv_xname); - espinit(sc, 1); - return 1; - } - continue; /* ie. next phase expected soon */ - } - -#define ESPINTR_DONE (ESPINTR_FC|ESPINTR_BS) - if ((sc->sc_espintr & ESPINTR_DONE) == ESPINTR_DONE) { - ecb = sc->sc_nexus; - if (!ecb) - panic("esp: not nexus at sc->sc_nexus"); - - sc_link = ecb->xs->sc_link; - ti = &sc->sc_tinfo[sc_link->target]; - - switch (sc->sc_espstep) { - case 0: - printf("%s: select timeout/no disconnect\n", - sc->sc_dev.dv_xname); - ecb->xs->error = XS_SELTIMEOUT; - goto finish; - case 1: - if ((ti->flags & T_NEGOTIATE) == 0) { - printf("%s: step 1 & !NEG\n", - sc->sc_dev.dv_xname); - goto reset; - } - if (sc->sc_phase != MESSAGE_OUT_PHASE) { - printf("%s: !MSGOUT\n", - sc->sc_dev.dv_xname); - goto reset; - } - /* Start negotiating */ - ti->period = sc->sc_minsync; - ti->offset = 15; - sc->sc_flags |= ESP_SYNCHNEGO; - esp_sched_msgout(SEND_SDTR); - break; - case 3: - /* - * Grr, this is supposed to mean - * "target left command phase - * prematurely". It seems to happen - * regularly when sync mode is on. - * Look at FIFO to see if command - * went out. - * (Timing problems?) - */ - if ((ESP_READ_REG(sc, ESP_FFLAG)&ESPFIFO_FF) == 0) { - /* Hope for the best.. */ - break; - } - printf("(%s:%d:%d): selection failed;" - " %d left in FIFO " - "[intr %x, stat %x, step %d]\n", - sc->sc_dev.dv_xname, - sc_link->target, - sc_link->lun, - ESP_READ_REG(sc, ESP_FFLAG) & ESPFIFO_FF, - sc->sc_espintr, sc->sc_espstat, - sc->sc_espstep); - ESPCMD(sc, ESPCMD_FLUSH); - esp_sched_msgout(SEND_ABORT); - return 1; - case 2: - /* Select stuck at Command Phase */ - ESPCMD(sc, ESPCMD_FLUSH); - case 4: - /* So far, everything went fine */ - break; - } -#if 0 - if (ecb->xs->flags & SCSI_RESET) - esp_sched_msgout(SEND_DEV_RESET); - else if (ti->flags & T_NEGOTIATE) - esp_sched_msgout( - SEND_IDENTIFY | SEND_SDTR); - else - esp_sched_msgout(SEND_IDENTIFY); -#endif - - ecb->flags |= ECB_NEXUS; - ti->lubusy |= (1 << sc_link->lun); - - sc->sc_prevphase = INVALID_PHASE; /* ?? */ - /* Do an implicit RESTORE POINTERS. */ - sc->sc_dp = ecb->daddr; - sc->sc_dleft = ecb->dleft; - - /* On our first connection, schedule a timeout. */ - if ((ecb->xs->flags & SCSI_POLL) == 0) - timeout_add(&ecb->xs->stimeout, - (ecb->timeout * hz) / 1000); - - sc->sc_state = ESP_CONNECTED; - break; - } else { - printf("%s: unexpected status after select" - ": [intr %x, stat %x, step %x]\n", - sc->sc_dev.dv_xname, - sc->sc_espintr, sc->sc_espstat, - sc->sc_espstep); - ESPCMD(sc, ESPCMD_FLUSH); - DELAY(1); - goto reset; - } - if (sc->sc_state == ESP_IDLE) { - printf("%s: stray interrupt\n", sc->sc_dev.dv_xname); - return 0; - } - break; - - case ESP_CONNECTED: - if (sc->sc_flags & ESP_ICCS) { - u_char msg; - - sc->sc_flags &= ~ESP_ICCS; - - if (!(sc->sc_espintr & ESPINTR_DONE)) { - printf("%s: ICCS: " - ": [intr %x, stat %x, step %x]\n", - sc->sc_dev.dv_xname, - sc->sc_espintr, sc->sc_espstat, - sc->sc_espstep); - } - if ((ESP_READ_REG(sc, ESP_FFLAG) & ESPFIFO_FF) != 2) { - int i = (ESP_READ_REG(sc, ESP_FFLAG) & ESPFIFO_FF) - 2; - while (i--) - (void) ESP_READ_REG(sc, ESP_FIFO); - } - ecb->stat = ESP_READ_REG(sc, ESP_FIFO); - msg = ESP_READ_REG(sc, ESP_FIFO); - ESP_PHASE(("<stat:(%x,%x)>", ecb->stat, msg)); - if (msg == MSG_CMDCOMPLETE) { - ecb->xs->resid = ecb->dleft = sc->sc_dleft; - sc->sc_state = ESP_CMDCOMPLETE; - } else - printf("%s: STATUS_PHASE: msg %d\n", - sc->sc_dev.dv_xname, msg); - ESPCMD(sc, ESPCMD_MSGOK); - continue; /* ie. wait for disconnect */ - } - break; - default: - panic("%s: invalid state: %d", - sc->sc_dev.dv_xname, - sc->sc_state); - } - - /* - * Driver is now in state ESP_CONNECTED, i.e. we - * have a current command working the SCSI bus. - */ - if (sc->sc_state != ESP_CONNECTED || ecb == NULL) { - panic("esp no nexus"); - } - - switch (sc->sc_phase) { - case MESSAGE_OUT_PHASE: - ESP_PHASE(("MESSAGE_OUT_PHASE ")); - esp_msgout(sc); - sc->sc_prevphase = MESSAGE_OUT_PHASE; - break; - case MESSAGE_IN_PHASE: - ESP_PHASE(("MESSAGE_IN_PHASE ")); - if (sc->sc_espintr & ESPINTR_BS) { - ESPCMD(sc, ESPCMD_FLUSH); - sc->sc_flags |= ESP_WAITI; - ESPCMD(sc, ESPCMD_TRANS); - } else if (sc->sc_espintr & ESPINTR_FC) { - if ((sc->sc_flags & ESP_WAITI) == 0) { - printf("%s: MSGIN: unexpected FC bit: " - "[intr %x, stat %x, step %x]\n", - sc->sc_dev.dv_xname, - sc->sc_espintr, sc->sc_espstat, - sc->sc_espstep); - } - sc->sc_flags &= ~ESP_WAITI; - esp_msgin(sc); - } else { - printf("%s: MSGIN: weird bits: " - "[intr %x, stat %x, step %x]\n", - sc->sc_dev.dv_xname, - sc->sc_espintr, sc->sc_espstat, - sc->sc_espstep); - } - sc->sc_prevphase = MESSAGE_IN_PHASE; - break; - case COMMAND_PHASE: { - /* well, this means send the command again */ - u_char *cmd = (u_char *)&ecb->cmd; - int i; - - ESP_PHASE(("COMMAND_PHASE 0x%02x (%d) ", - ecb->cmd.opcode, ecb->clen)); - if (ESP_READ_REG(sc, ESP_FFLAG) & ESPFIFO_FF) { - ESPCMD(sc, ESPCMD_FLUSH); - DELAY(1); - } - /* Now the command into the FIFO */ - for (i = 0; i < ecb->clen; i++) - ESP_WRITE_REG(sc, ESP_FIFO, *cmd++); - ESPCMD(sc, ESPCMD_TRANS); - sc->sc_prevphase = COMMAND_PHASE; - } - break; - case DATA_OUT_PHASE: - ESP_PHASE(("DATA_OUT_PHASE [%ld] ",(long)sc->sc_dleft)); - ESPCMD(sc, ESPCMD_FLUSH); - size = min(sc->sc_dleft, sc->sc_maxxfer); - DMA_SETUP(sc->sc_dma, &sc->sc_dp, &sc->sc_dleft, - 0, &size); - sc->sc_prevphase = DATA_OUT_PHASE; - goto setup_xfer; - case DATA_IN_PHASE: - ESP_PHASE(("DATA_IN_PHASE ")); - if (sc->sc_rev == ESP100) - ESPCMD(sc, ESPCMD_FLUSH); - size = min(sc->sc_dleft, sc->sc_maxxfer); - DMA_SETUP(sc->sc_dma, &sc->sc_dp, &sc->sc_dleft, - 1, &size); - sc->sc_prevphase = DATA_IN_PHASE; - setup_xfer: - /* Program the SCSI counter */ - ESP_WRITE_REG(sc, ESP_TCL, size); - ESP_WRITE_REG(sc, ESP_TCM, size >> 8); - if (sc->sc_cfg2 & ESPCFG2_FE) { - ESP_WRITE_REG(sc, ESP_TCH, size >> 16); - } - /* load the count in */ - ESPCMD(sc, ESPCMD_NOP|ESPCMD_DMA); - - /* - * Note that if `size' is 0, we've already transceived - * all the bytes we want but we're still in DATA PHASE. - * Apparently, the device needs padding. Also, a - * transfer size of 0 means "maximum" to the chip - * DMA logic. - */ - ESPCMD(sc, - (size==0?ESPCMD_TRPAD:ESPCMD_TRANS)|ESPCMD_DMA); - DMA_GO(sc->sc_dma); - return 1; - case STATUS_PHASE: - ESP_PHASE(("STATUS_PHASE ")); - sc->sc_flags |= ESP_ICCS; - ESPCMD(sc, ESPCMD_ICCS); - sc->sc_prevphase = STATUS_PHASE; - break; - case INVALID_PHASE: - break; - default: - printf("%s: unexpected bus phase; resetting\n", - sc->sc_dev.dv_xname); - goto reset; - } - } - panic("esp: should not get here.."); - -reset: - espinit(sc, 1); - return 1; - -finish: - timeout_del(&ecb->xs->stimeout); - esp_done(sc, ecb); - goto out; - -sched: - sc->sc_state = ESP_IDLE; - esp_sched(sc); - goto out; - -out: - return 1; -} - -void -esp_abort(sc, ecb) - struct esp_softc *sc; - struct esp_ecb *ecb; -{ - - /* 2 secs for the abort */ - ecb->timeout = ESP_ABORT_TIMEOUT; - ecb->flags |= ECB_ABORT; - - if (ecb == sc->sc_nexus) { - /* - * If we're still selecting, the message will be scheduled - * after selection is complete. - */ - if (sc->sc_state == ESP_CONNECTED) - esp_sched_msgout(SEND_ABORT); - - /* - * Reschedule timeout. First, cancel a queued timeout (if any) - * in case someone decides to call esp_abort() from elsewhere. - */ - timeout_add(&ecb->xs->stimeout, (ecb->timeout * hz) / 1000); - } else { - esp_dequeue(sc, ecb); - TAILQ_INSERT_HEAD(&sc->ready_list, ecb, chain); - if (sc->sc_state == ESP_IDLE) - esp_sched(sc); - } -} - -void -esp_timeout(arg) - void *arg; -{ - struct esp_ecb *ecb = arg; - struct scsi_xfer *xs = ecb->xs; - struct scsi_link *sc_link = xs->sc_link; - struct esp_softc *sc = sc_link->adapter_softc; - int s; - - sc_print_addr(sc_link); - printf("%s: timed out [ecb %p (flags 0x%x, dleft %x, stat %x)], " - "<state %d, nexus %p, phase(c %x, p %x), resid %lx, msg(q %x,o %x) %s>", - sc->sc_dev.dv_xname, - ecb, ecb->flags, ecb->dleft, ecb->stat, - sc->sc_state, sc->sc_nexus, sc->sc_phase, sc->sc_prevphase, - (long)sc->sc_dleft, sc->sc_msgpriq, sc->sc_msgout, - DMA_ISACTIVE(sc->sc_dma) ? "DMA active" : ""); -#if ESP_DEBUG > 0 - printf("TRACE: %s.", ecb->trace); -#endif - - s = splbio(); - - if (ecb->flags & ECB_ABORT) { - /* abort timed out */ - printf(" AGAIN\n"); - espinit(sc, 1); - } else { - /* abort the operation that has timed out */ - printf("\n"); - xs->error = XS_TIMEOUT; - esp_abort(sc, ecb); - } - - splx(s); -} |