/*- * Copyright (c) 2004 Scott Long * Copyright (c) 2005, 2008 Marius Strobl * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. * */ /* $NetBSD: ncr53c9x.c,v 1.145 2012/06/18 21:23:56 martin Exp $ */ /*- * Copyright (c) 1998, 2002 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Charles M. Hannum. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /*- * 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@FreeBSD.org) and * Charles Hannum (mycroft@duality.gnu.ai.mit.edu). Thanks a million! */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include devclass_t esp_devclass; MODULE_DEPEND(esp, cam, 1, 1, 1); #ifdef NCR53C9X_DEBUG int ncr53c9x_debug = NCR_SHOWMISC /* | NCR_SHOWPHASE | NCR_SHOWTRAC | NCR_SHOWCMDS */; #endif static void ncr53c9x_abort(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb); static void ncr53c9x_action(struct cam_sim *sim, union ccb *ccb); static void ncr53c9x_async(void *cbarg, uint32_t code, struct cam_path *path, void *arg); static void ncr53c9x_callout(void *arg); static void ncr53c9x_clear(struct ncr53c9x_softc *sc, cam_status result); static void ncr53c9x_clear_target(struct ncr53c9x_softc *sc, int target, cam_status result); static void ncr53c9x_dequeue(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb); static void ncr53c9x_done(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb); static void ncr53c9x_free_ecb(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb); static void ncr53c9x_msgin(struct ncr53c9x_softc *sc); static void ncr53c9x_msgout(struct ncr53c9x_softc *sc); static void ncr53c9x_init(struct ncr53c9x_softc *sc, int doreset); static void ncr53c9x_intr1(struct ncr53c9x_softc *sc); static void ncr53c9x_poll(struct cam_sim *sim); static int ncr53c9x_rdfifo(struct ncr53c9x_softc *sc, int how); static int ncr53c9x_reselect(struct ncr53c9x_softc *sc, int message, int tagtype, int tagid); static void ncr53c9x_reset(struct ncr53c9x_softc *sc); static void ncr53c9x_sense(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb); static void ncr53c9x_sched(struct ncr53c9x_softc *sc); static void ncr53c9x_select(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb); static void ncr53c9x_watch(void *arg); static void ncr53c9x_wrfifo(struct ncr53c9x_softc *sc, uint8_t *p, int len); static struct ncr53c9x_ecb *ncr53c9x_get_ecb(struct ncr53c9x_softc *sc); static struct ncr53c9x_linfo *ncr53c9x_lunsearch(struct ncr53c9x_tinfo *sc, int64_t lun); static inline void ncr53c9x_readregs(struct ncr53c9x_softc *sc); static inline void ncr53c9x_setsync(struct ncr53c9x_softc *sc, struct ncr53c9x_tinfo *ti); static inline int ncr53c9x_stp2cpb(struct ncr53c9x_softc *sc, int period); #define NCR_RDFIFO_START 0 #define NCR_RDFIFO_CONTINUE 1 #define NCR_SET_COUNT(sc, size) do { \ NCR_WRITE_REG((sc), NCR_TCL, (size)); \ NCR_WRITE_REG((sc), NCR_TCM, (size) >> 8); \ if ((sc->sc_features & NCR_F_LARGEXFER) != 0) \ NCR_WRITE_REG((sc), NCR_TCH, (size) >> 16); \ if (sc->sc_rev == NCR_VARIANT_FAS366) \ NCR_WRITE_REG(sc, NCR_RCH, 0); \ } while (/* CONSTCOND */0) #ifndef mstohz #define mstohz(ms) \ (((ms) < 0x20000) ? \ ((ms +0u) / 1000u) * hz : \ ((ms +0u) * hz) /1000u) #endif /* * Names for the NCR53c9x variants, corresponding to the variant tags * in ncr53c9xvar.h. */ static const char *ncr53c9x_variant_names[] = { "ESP100", "ESP100A", "ESP200", "NCR53C94", "NCR53C96", "ESP406", "FAS408", "FAS216", "AM53C974", "FAS366/HME", "NCR53C90 (86C01)", "FAS100A", "FAS236", }; /* * Search linked list for LUN info by LUN id. */ static struct ncr53c9x_linfo * ncr53c9x_lunsearch(struct ncr53c9x_tinfo *ti, int64_t lun) { struct ncr53c9x_linfo *li; LIST_FOREACH(li, &ti->luns, link) if (li->lun == lun) return (li); return (NULL); } /* * Attach this instance, and then all the sub-devices. */ int ncr53c9x_attach(struct ncr53c9x_softc *sc) { struct cam_devq *devq; struct cam_sim *sim; struct cam_path *path; struct ncr53c9x_ecb *ecb; int error, i; if (NCR_LOCK_INITIALIZED(sc) == 0) { device_printf(sc->sc_dev, "mutex not initialized\n"); return (ENXIO); } callout_init_mtx(&sc->sc_watchdog, &sc->sc_lock, 0); /* * Note, the front-end has set us up to print the chip variation. */ if (sc->sc_rev >= NCR_VARIANT_MAX) { device_printf(sc->sc_dev, "unknown variant %d, devices not " "attached\n", sc->sc_rev); return (EINVAL); } device_printf(sc->sc_dev, "%s, %d MHz, SCSI ID %d\n", ncr53c9x_variant_names[sc->sc_rev], sc->sc_freq, sc->sc_id); sc->sc_ntarg = (sc->sc_rev == NCR_VARIANT_FAS366) ? 16 : 8; /* * Allocate SCSI message buffers. * Front-ends can override allocation to avoid alignment * handling in the DMA engines. Note that ncr53c9x_msgout() * can request a 1 byte DMA transfer. */ if (sc->sc_omess == NULL) { sc->sc_omess_self = 1; sc->sc_omess = malloc(NCR_MAX_MSG_LEN, M_DEVBUF, M_NOWAIT); if (sc->sc_omess == NULL) { device_printf(sc->sc_dev, "cannot allocate MSGOUT buffer\n"); return (ENOMEM); } } else sc->sc_omess_self = 0; if (sc->sc_imess == NULL) { sc->sc_imess_self = 1; sc->sc_imess = malloc(NCR_MAX_MSG_LEN + 1, M_DEVBUF, M_NOWAIT); if (sc->sc_imess == NULL) { device_printf(sc->sc_dev, "cannot allocate MSGIN buffer\n"); error = ENOMEM; goto fail_omess; } } else sc->sc_imess_self = 0; sc->sc_tinfo = malloc(sc->sc_ntarg * sizeof(sc->sc_tinfo[0]), M_DEVBUF, M_NOWAIT | M_ZERO); if (sc->sc_tinfo == NULL) { device_printf(sc->sc_dev, "cannot allocate target info buffer\n"); error = ENOMEM; goto fail_imess; } /* * Treat NCR53C90 with the 86C01 DMA chip exactly as ESP100 * from now on. */ if (sc->sc_rev == NCR_VARIANT_NCR53C90_86C01) sc->sc_rev = NCR_VARIANT_ESP100; 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: * * (timeout 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); /* The CCF register only has 3 bits; 0 is actually 8. */ sc->sc_ccf &= 7; /* * Register with CAM. */ devq = cam_simq_alloc(sc->sc_ntarg); if (devq == NULL) { device_printf(sc->sc_dev, "cannot allocate device queue\n"); error = ENOMEM; goto fail_tinfo; } sim = cam_sim_alloc(ncr53c9x_action, ncr53c9x_poll, "esp", sc, device_get_unit(sc->sc_dev), &sc->sc_lock, 1, NCR_TAG_DEPTH, devq); if (sim == NULL) { device_printf(sc->sc_dev, "cannot allocate SIM entry\n"); error = ENOMEM; goto fail_devq; } NCR_LOCK(sc); if (xpt_bus_register(sim, sc->sc_dev, 0) != CAM_SUCCESS) { device_printf(sc->sc_dev, "cannot register bus\n"); error = EIO; goto fail_lock; } if (xpt_create_path(&path, NULL, cam_sim_path(sim), CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) { device_printf(sc->sc_dev, "cannot create path\n"); error = EIO; goto fail_bus; } if (xpt_register_async(AC_LOST_DEVICE, ncr53c9x_async, sim, path) != CAM_REQ_CMP) { device_printf(sc->sc_dev, "cannot register async handler\n"); error = EIO; goto fail_path; } sc->sc_sim = sim; sc->sc_path = path; /* Reset state and bus. */ #if 0 sc->sc_cfflags = sc->sc_dev.dv_cfdata->cf_flags; #else sc->sc_cfflags = 0; #endif sc->sc_state = 0; ncr53c9x_init(sc, 1); TAILQ_INIT(&sc->free_list); if ((sc->ecb_array = malloc(sizeof(struct ncr53c9x_ecb) * NCR_TAG_DEPTH, M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL) { device_printf(sc->sc_dev, "cannot allocate ECB array\n"); error = ENOMEM; goto fail_async; } for (i = 0; i < NCR_TAG_DEPTH; i++) { ecb = &sc->ecb_array[i]; ecb->sc = sc; ecb->tag_id = i; callout_init_mtx(&ecb->ch, &sc->sc_lock, 0); TAILQ_INSERT_HEAD(&sc->free_list, ecb, free_links); } callout_reset(&sc->sc_watchdog, 60 * hz, ncr53c9x_watch, sc); NCR_UNLOCK(sc); return (0); fail_async: xpt_register_async(0, ncr53c9x_async, sim, path); fail_path: xpt_free_path(path); fail_bus: xpt_bus_deregister(cam_sim_path(sim)); fail_lock: NCR_UNLOCK(sc); cam_sim_free(sim, TRUE); fail_devq: cam_simq_free(devq); fail_tinfo: free(sc->sc_tinfo, M_DEVBUF); fail_imess: if (sc->sc_imess_self) free(sc->sc_imess, M_DEVBUF); fail_omess: if (sc->sc_omess_self) free(sc->sc_omess, M_DEVBUF); return (error); } int ncr53c9x_detach(struct ncr53c9x_softc *sc) { struct ncr53c9x_linfo *li, *nextli; int t; callout_drain(&sc->sc_watchdog); NCR_LOCK(sc); if (sc->sc_tinfo) { /* Cancel all commands. */ ncr53c9x_clear(sc, CAM_REQ_ABORTED); /* Free logical units. */ for (t = 0; t < sc->sc_ntarg; t++) { for (li = LIST_FIRST(&sc->sc_tinfo[t].luns); li; li = nextli) { nextli = LIST_NEXT(li, link); free(li, M_DEVBUF); } } } xpt_register_async(0, ncr53c9x_async, sc->sc_sim, sc->sc_path); xpt_free_path(sc->sc_path); xpt_bus_deregister(cam_sim_path(sc->sc_sim)); cam_sim_free(sc->sc_sim, TRUE); NCR_UNLOCK(sc); free(sc->ecb_array, M_DEVBUF); free(sc->sc_tinfo, M_DEVBUF); if (sc->sc_imess_self) free(sc->sc_imess, M_DEVBUF); if (sc->sc_omess_self) free(sc->sc_omess, M_DEVBUF); return (0); } /* * This is the generic ncr53c9x reset function. It does not reset the SCSI * bus, only this controller, 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. */ static void ncr53c9x_reset(struct ncr53c9x_softc *sc) { NCR_LOCK_ASSERT(sc, MA_OWNED); /* Reset DMA first. */ NCRDMA_RESET(sc); /* Reset SCSI chip. */ NCRCMD(sc, NCRCMD_RSTCHIP); NCRCMD(sc, NCRCMD_NOP); DELAY(500); /* Do these backwards, and fall through. */ switch (sc->sc_rev) { case NCR_VARIANT_ESP406: case NCR_VARIANT_FAS408: NCR_WRITE_REG(sc, NCR_CFG5, sc->sc_cfg5 | NCRCFG5_SINT); NCR_WRITE_REG(sc, NCR_CFG4, sc->sc_cfg4); /* FALLTHROUGH */ case NCR_VARIANT_AM53C974: case NCR_VARIANT_FAS100A: case NCR_VARIANT_FAS216: case NCR_VARIANT_FAS236: case NCR_VARIANT_NCR53C94: case NCR_VARIANT_NCR53C96: case NCR_VARIANT_ESP200: sc->sc_features |= NCR_F_HASCFG3; NCR_WRITE_REG(sc, NCR_CFG3, sc->sc_cfg3); /* FALLTHROUGH */ case NCR_VARIANT_ESP100A: sc->sc_features |= NCR_F_SELATN3; if ((sc->sc_cfg2 & NCRCFG2_FE) != 0) sc->sc_features |= NCR_F_LARGEXFER; NCR_WRITE_REG(sc, NCR_CFG2, sc->sc_cfg2); /* FALLTHROUGH */ case NCR_VARIANT_ESP100: NCR_WRITE_REG(sc, NCR_CFG1, sc->sc_cfg1); NCR_WRITE_REG(sc, NCR_CCF, sc->sc_ccf); NCR_WRITE_REG(sc, NCR_SYNCOFF, 0); NCR_WRITE_REG(sc, NCR_TIMEOUT, sc->sc_timeout); break; case NCR_VARIANT_FAS366: sc->sc_features |= NCR_F_HASCFG3 | NCR_F_FASTSCSI | NCR_F_SELATN3 | NCR_F_LARGEXFER; sc->sc_cfg3 = NCRFASCFG3_FASTCLK | NCRFASCFG3_OBAUTO; if (sc->sc_id > 7) sc->sc_cfg3 |= NCRFASCFG3_IDBIT3; sc->sc_cfg3_fscsi = NCRFASCFG3_FASTSCSI; NCR_WRITE_REG(sc, NCR_CFG3, sc->sc_cfg3); sc->sc_cfg2 = NCRCFG2_HMEFE | NCRCFG2_HME32; NCR_WRITE_REG(sc, NCR_CFG2, sc->sc_cfg2); NCR_WRITE_REG(sc, NCR_CFG1, sc->sc_cfg1); NCR_WRITE_REG(sc, NCR_CCF, sc->sc_ccf); NCR_WRITE_REG(sc, NCR_SYNCOFF, 0); NCR_WRITE_REG(sc, NCR_TIMEOUT, sc->sc_timeout); break; default: device_printf(sc->sc_dev, "unknown revision code, assuming ESP100\n"); NCR_WRITE_REG(sc, NCR_CFG1, sc->sc_cfg1); NCR_WRITE_REG(sc, NCR_CCF, sc->sc_ccf); NCR_WRITE_REG(sc, NCR_SYNCOFF, 0); NCR_WRITE_REG(sc, NCR_TIMEOUT, sc->sc_timeout); } if (sc->sc_rev == NCR_VARIANT_AM53C974) NCR_WRITE_REG(sc, NCR_AMDCFG4, sc->sc_cfg4); #if 0 device_printf(sc->sc_dev, "%s: revision %d\n", __func__, sc->sc_rev); device_printf(sc->sc_dev, "%s: cfg1 0x%x, cfg2 0x%x, cfg3 0x%x, ccf " "0x%x, timeout 0x%x\n", __func__, sc->sc_cfg1, sc->sc_cfg2, sc->sc_cfg3, sc->sc_ccf, sc->sc_timeout); #endif } /* * Clear all commands. */ static void ncr53c9x_clear(struct ncr53c9x_softc *sc, cam_status result) { struct ncr53c9x_ecb *ecb; int r; NCR_LOCK_ASSERT(sc, MA_OWNED); /* Cancel any active commands. */ sc->sc_state = NCR_CLEANING; sc->sc_msgify = 0; ecb = sc->sc_nexus; if (ecb != NULL) { ecb->ccb->ccb_h.status = result; ncr53c9x_done(sc, ecb); } /* Cancel outstanding disconnected commands. */ for (r = 0; r < sc->sc_ntarg; r++) ncr53c9x_clear_target(sc, r, result); } /* * Clear all commands for a specific target. */ static void ncr53c9x_clear_target(struct ncr53c9x_softc *sc, int target, cam_status result) { struct ncr53c9x_ecb *ecb; struct ncr53c9x_linfo *li; int i; NCR_LOCK_ASSERT(sc, MA_OWNED); /* Cancel outstanding disconnected commands on each LUN. */ LIST_FOREACH(li, &sc->sc_tinfo[target].luns, link) { ecb = li->untagged; if (ecb != NULL) { li->untagged = NULL; /* * XXX should we terminate a command * that never reached the disk? */ li->busy = 0; ecb->ccb->ccb_h.status = result; ncr53c9x_done(sc, ecb); } for (i = 0; i < NCR_TAG_DEPTH; i++) { ecb = li->queued[i]; if (ecb != NULL) { li->queued[i] = NULL; ecb->ccb->ccb_h.status = result; ncr53c9x_done(sc, ecb); } } li->used = 0; } } /* * Initialize ncr53c9x state machine. */ static void ncr53c9x_init(struct ncr53c9x_softc *sc, int doreset) { struct ncr53c9x_tinfo *ti; int r; NCR_LOCK_ASSERT(sc, MA_OWNED); NCR_MISC(("[NCR_INIT(%d) %d] ", doreset, sc->sc_state)); if (sc->sc_state == 0) { /* First time through; initialize. */ TAILQ_INIT(&sc->ready_list); sc->sc_nexus = NULL; memset(sc->sc_tinfo, 0, sizeof(*sc->sc_tinfo)); for (r = 0; r < sc->sc_ntarg; r++) { LIST_INIT(&sc->sc_tinfo[r].luns); } } else ncr53c9x_clear(sc, CAM_CMD_TIMEOUT); /* * Reset the chip to a known state. */ ncr53c9x_reset(sc); sc->sc_flags = 0; sc->sc_msgpriq = sc->sc_msgout = sc->sc_msgoutq = 0; sc->sc_phase = sc->sc_prevphase = INVALID_PHASE; /* * If we're the first time through, set the default parameters * for all targets. Otherwise we only clear their current transfer * settings so we'll renegotiate their goal settings with the next * command. */ if (sc->sc_state == 0) { for (r = 0; r < sc->sc_ntarg; r++) { ti = &sc->sc_tinfo[r]; /* XXX - config flags per target: low bits: no reselect; high bits: no synch */ ti->flags = ((sc->sc_minsync != 0 && (sc->sc_cfflags & (1 << ((r & 7) + 8))) == 0) ? 0 : T_SYNCHOFF) | ((sc->sc_cfflags & (1 << (r & 7))) == 0 ? 0 : T_RSELECTOFF); ti->curr.period = ti->goal.period = 0; ti->curr.offset = ti->goal.offset = 0; ti->curr.width = ti->goal.width = MSG_EXT_WDTR_BUS_8_BIT; } } else { for (r = 0; r < sc->sc_ntarg; r++) { ti = &sc->sc_tinfo[r]; ti->flags &= ~(T_SDTRSENT | T_WDTRSENT); ti->curr.period = 0; ti->curr.offset = 0; ti->curr.width = MSG_EXT_WDTR_BUS_8_BIT; } } if (doreset) { sc->sc_state = NCR_SBR; NCRCMD(sc, NCRCMD_RSTSCSI); /* Give the bus a fighting chance to settle. */ DELAY(250000); } else { sc->sc_state = NCR_IDLE; ncr53c9x_sched(sc); } } /* * Read the NCR registers, and save their contents for later use. * NCR_STAT, NCR_STEP & NCR_INTR are mostly zeroed out when reading * NCR_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 the DMA CSR has an interrupt showing. Call only * if an interrupt is pending. */ static inline void ncr53c9x_readregs(struct ncr53c9x_softc *sc) { NCR_LOCK_ASSERT(sc, MA_OWNED); sc->sc_espstat = NCR_READ_REG(sc, NCR_STAT); /* Only the step bits are of interest. */ sc->sc_espstep = NCR_READ_REG(sc, NCR_STEP) & NCRSTEP_MASK; if (sc->sc_rev == NCR_VARIANT_FAS366) sc->sc_espstat2 = NCR_READ_REG(sc, NCR_STAT2); sc->sc_espintr = NCR_READ_REG(sc, NCR_INTR); /* * 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 & NCRINTR_DIS) ? BUSFREE_PHASE : sc->sc_espstat & NCRSTAT_PHASE; NCR_INTS(("regs[intr=%02x,stat=%02x,step=%02x,stat2=%02x] ", sc->sc_espintr, sc->sc_espstat, sc->sc_espstep, sc->sc_espstat2)); } /* * Convert Synchronous Transfer Period to chip register Clock Per Byte value. */ static inline int ncr53c9x_stp2cpb(struct ncr53c9x_softc *sc, int period) { int v; NCR_LOCK_ASSERT(sc, MA_OWNED); v = (sc->sc_freq * period) / 250; if (ncr53c9x_cpb2stp(sc, v) < period) /* Correct round-down error. */ v++; return (v); } static inline void ncr53c9x_setsync(struct ncr53c9x_softc *sc, struct ncr53c9x_tinfo *ti) { uint8_t cfg3, syncoff, synctp; NCR_LOCK_ASSERT(sc, MA_OWNED); cfg3 = sc->sc_cfg3; if (ti->curr.offset != 0) { syncoff = ti->curr.offset; synctp = ncr53c9x_stp2cpb(sc, ti->curr.period); if (sc->sc_features & NCR_F_FASTSCSI) { /* * If the period is 200ns or less (ti->period <= 50), * put the chip in Fast SCSI mode. */ if (ti->curr.period <= 50) /* * There are (at least) 4 variations of the * configuration 3 register. The drive attach * routine sets the appropriate bit to put the * chip into Fast SCSI mode so that it doesn't * have to be figured out here each time. */ cfg3 |= sc->sc_cfg3_fscsi; } /* * Am53c974 requires different SYNCTP values when the * FSCSI bit is off. */ if (sc->sc_rev == NCR_VARIANT_AM53C974 && (cfg3 & NCRAMDCFG3_FSCSI) == 0) synctp--; } else { syncoff = 0; synctp = 0; } if (ti->curr.width != MSG_EXT_WDTR_BUS_8_BIT) { if (sc->sc_rev == NCR_VARIANT_FAS366) cfg3 |= NCRFASCFG3_EWIDE; } if (sc->sc_features & NCR_F_HASCFG3) NCR_WRITE_REG(sc, NCR_CFG3, cfg3); NCR_WRITE_REG(sc, NCR_SYNCOFF, syncoff); NCR_WRITE_REG(sc, NCR_SYNCTP, synctp); } /* * Send a command to a target, set the driver state to NCR_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. */ static void ncr53c9x_select(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb) { struct ncr53c9x_tinfo *ti; uint8_t *cmd; size_t dmasize; int clen, error, selatn3, selatns; int lun = ecb->ccb->ccb_h.target_lun; int target = ecb->ccb->ccb_h.target_id; NCR_LOCK_ASSERT(sc, MA_OWNED); NCR_TRACE(("[%s(t%d,l%d,cmd:%x,tag:%x,%x)] ", __func__, target, lun, ecb->cmd.cmd.opcode, ecb->tag[0], ecb->tag[1])); ti = &sc->sc_tinfo[target]; sc->sc_state = NCR_SELECTING; /* * Schedule the callout now, the first time we will go away * expecting to come back due to an interrupt, because it is * always possible that the interrupt may never happen. */ callout_reset(&ecb->ch, mstohz(ecb->timeout), ncr53c9x_callout, ecb); /* * The docs say the target register is never reset, and I * can't think of a better place to set it. */ if (sc->sc_rev == NCR_VARIANT_FAS366) { NCRCMD(sc, NCRCMD_FLUSH); NCR_WRITE_REG(sc, NCR_SELID, target | NCR_BUSID_HMEXC32 | NCR_BUSID_HMEENCID); } else NCR_WRITE_REG(sc, NCR_SELID, target); /* * If we are requesting sense, force a renegotiation if we are * currently using anything different from asynchronous at 8 bit * as the target might have lost our transfer negotiations. */ if ((ecb->flags & ECB_SENSE) != 0 && (ti->curr.offset != 0 || ti->curr.width != MSG_EXT_WDTR_BUS_8_BIT)) { ti->curr.period = 0; ti->curr.offset = 0; ti->curr.width = MSG_EXT_WDTR_BUS_8_BIT; } ncr53c9x_setsync(sc, ti); selatn3 = selatns = 0; if (ecb->tag[0] != 0) { if (sc->sc_features & NCR_F_SELATN3) /* Use SELATN3 to send tag messages. */ selatn3 = 1; else /* We don't have SELATN3; use SELATNS to send tags. */ selatns = 1; } if (ti->curr.period != ti->goal.period || ti->curr.offset != ti->goal.offset || ti->curr.width != ti->goal.width) { /* We have to use SELATNS to send sync/wide messages. */ selatn3 = 0; selatns = 1; } cmd = (uint8_t *)&ecb->cmd.cmd; if (selatn3) { /* We'll use tags with SELATN3. */ clen = ecb->clen + 3; cmd -= 3; cmd[0] = MSG_IDENTIFY(lun, 1); /* msg[0] */ cmd[1] = ecb->tag[0]; /* msg[1] */ cmd[2] = ecb->tag[1]; /* msg[2] */ } else { /* We don't have tags, or will send messages with SELATNS. */ clen = ecb->clen + 1; cmd -= 1; cmd[0] = MSG_IDENTIFY(lun, (ti->flags & T_RSELECTOFF) == 0); } if ((sc->sc_features & NCR_F_DMASELECT) && !selatns) { /* Setup DMA transfer for command. */ dmasize = clen; sc->sc_cmdlen = clen; sc->sc_cmdp = cmd; error = NCRDMA_SETUP(sc, &sc->sc_cmdp, &sc->sc_cmdlen, 0, &dmasize); if (error != 0) goto cmd; /* Program the SCSI counter. */ NCR_SET_COUNT(sc, dmasize); /* Load the count in. */ NCRCMD(sc, NCRCMD_NOP | NCRCMD_DMA); /* And get the target's attention. */ if (selatn3) { sc->sc_msgout = SEND_TAG; sc->sc_flags |= NCR_ATN; NCRCMD(sc, NCRCMD_SELATN3 | NCRCMD_DMA); } else NCRCMD(sc, NCRCMD_SELATN | NCRCMD_DMA); NCRDMA_GO(sc); return; } cmd: /* * Who am I? This is where we tell the target that we are * happy for it to disconnect etc. */ /* Now get the command into the FIFO. */ sc->sc_cmdlen = 0; ncr53c9x_wrfifo(sc, cmd, clen); /* And get the target's attention. */ if (selatns) { NCR_MSGS(("SELATNS \n")); /* Arbitrate, select and stop after IDENTIFY message. */ NCRCMD(sc, NCRCMD_SELATNS); } else if (selatn3) { sc->sc_msgout = SEND_TAG; sc->sc_flags |= NCR_ATN; NCRCMD(sc, NCRCMD_SELATN3); } else NCRCMD(sc, NCRCMD_SELATN); } static void ncr53c9x_free_ecb(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb) { NCR_LOCK_ASSERT(sc, MA_OWNED); ecb->flags = 0; TAILQ_INSERT_TAIL(&sc->free_list, ecb, free_links); } static struct ncr53c9x_ecb * ncr53c9x_get_ecb(struct ncr53c9x_softc *sc) { struct ncr53c9x_ecb *ecb; NCR_LOCK_ASSERT(sc, MA_OWNED); ecb = TAILQ_FIRST(&sc->free_list); if (ecb) { if (ecb->flags != 0) panic("%s: ecb flags not cleared", __func__); TAILQ_REMOVE(&sc->free_list, ecb, free_links); ecb->flags = ECB_ALLOC; bzero(&ecb->ccb, sizeof(struct ncr53c9x_ecb) - offsetof(struct ncr53c9x_ecb, ccb)); } 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. */ static void ncr53c9x_action(struct cam_sim *sim, union ccb *ccb) { struct ccb_pathinq *cpi; struct ccb_scsiio *csio; struct ccb_trans_settings *cts; struct ccb_trans_settings_scsi *scsi; struct ccb_trans_settings_spi *spi; struct ncr53c9x_ecb *ecb; struct ncr53c9x_softc *sc; struct ncr53c9x_tinfo *ti; int target; sc = cam_sim_softc(sim); NCR_LOCK_ASSERT(sc, MA_OWNED); NCR_TRACE(("[%s %d]", __func__, ccb->ccb_h.func_code)); switch (ccb->ccb_h.func_code) { case XPT_RESET_BUS: ncr53c9x_init(sc, 1); ccb->ccb_h.status = CAM_REQ_CMP; break; case XPT_CALC_GEOMETRY: cam_calc_geometry(&ccb->ccg, sc->sc_extended_geom); break; case XPT_PATH_INQ: cpi = &ccb->cpi; cpi->version_num = 1; cpi->hba_inquiry = PI_SDTR_ABLE | PI_TAG_ABLE; cpi->hba_inquiry |= (sc->sc_rev == NCR_VARIANT_FAS366) ? PI_WIDE_16 : 0; cpi->target_sprt = 0; cpi->hba_misc = 0; cpi->hba_eng_cnt = 0; cpi->max_target = sc->sc_ntarg - 1; cpi->max_lun = 7; cpi->initiator_id = sc->sc_id; strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); strncpy(cpi->hba_vid, "NCR", HBA_IDLEN); strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN); cpi->unit_number = cam_sim_unit(sim); cpi->bus_id = 0; cpi->base_transfer_speed = 3300; cpi->protocol = PROTO_SCSI; cpi->protocol_version = SCSI_REV_2; cpi->transport = XPORT_SPI; cpi->transport_version = 2; cpi->maxio = sc->sc_maxxfer; ccb->ccb_h.status = CAM_REQ_CMP; break; case XPT_GET_TRAN_SETTINGS: cts = &ccb->cts; ti = &sc->sc_tinfo[ccb->ccb_h.target_id]; scsi = &cts->proto_specific.scsi; spi = &cts->xport_specific.spi; cts->protocol = PROTO_SCSI; cts->protocol_version = SCSI_REV_2; cts->transport = XPORT_SPI; cts->transport_version = 2; if (cts->type == CTS_TYPE_CURRENT_SETTINGS) { spi->sync_period = ti->curr.period; spi->sync_offset = ti->curr.offset; spi->bus_width = ti->curr.width; if ((ti->flags & T_TAG) != 0) { spi->flags |= CTS_SPI_FLAGS_DISC_ENB; scsi->flags |= CTS_SCSI_FLAGS_TAG_ENB; } else { spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; } } else { if ((ti->flags & T_SYNCHOFF) != 0) { spi->sync_period = 0; spi->sync_offset = 0; } else { spi->sync_period = sc->sc_minsync; spi->sync_offset = sc->sc_maxoffset; } spi->bus_width = sc->sc_maxwidth; spi->flags |= CTS_SPI_FLAGS_DISC_ENB; scsi->flags |= CTS_SCSI_FLAGS_TAG_ENB; } spi->valid = CTS_SPI_VALID_BUS_WIDTH | CTS_SPI_VALID_SYNC_RATE | CTS_SPI_VALID_SYNC_OFFSET | CTS_SPI_VALID_DISC; scsi->valid = CTS_SCSI_VALID_TQ; ccb->ccb_h.status = CAM_REQ_CMP; break; case XPT_ABORT: device_printf(sc->sc_dev, "XPT_ABORT called\n"); ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; break; case XPT_TERM_IO: device_printf(sc->sc_dev, "XPT_TERM_IO called\n"); ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; break; case XPT_RESET_DEV: case XPT_SCSI_IO: if (ccb->ccb_h.target_id < 0 || ccb->ccb_h.target_id >= sc->sc_ntarg) { ccb->ccb_h.status = CAM_PATH_INVALID; goto done; } /* Get an ECB to use. */ ecb = ncr53c9x_get_ecb(sc); /* * This should never happen as we track resources * in the mid-layer. */ if (ecb == NULL) { xpt_freeze_simq(sim, 1); ccb->ccb_h.status = CAM_REQUEUE_REQ; device_printf(sc->sc_dev, "unable to allocate ecb\n"); goto done; } /* Initialize ecb. */ ecb->ccb = ccb; ecb->timeout = ccb->ccb_h.timeout; if (ccb->ccb_h.func_code == XPT_RESET_DEV) { ecb->flags |= ECB_RESET; ecb->clen = 0; ecb->dleft = 0; } else { csio = &ccb->csio; if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0) bcopy(csio->cdb_io.cdb_ptr, &ecb->cmd.cmd, csio->cdb_len); else bcopy(csio->cdb_io.cdb_bytes, &ecb->cmd.cmd, csio->cdb_len); ecb->clen = csio->cdb_len; ecb->daddr = csio->data_ptr; ecb->dleft = csio->dxfer_len; } ecb->stat = 0; TAILQ_INSERT_TAIL(&sc->ready_list, ecb, chain); ecb->flags |= ECB_READY; if (sc->sc_state == NCR_IDLE) ncr53c9x_sched(sc); return; case XPT_SET_TRAN_SETTINGS: cts = &ccb->cts; target = ccb->ccb_h.target_id; ti = &sc->sc_tinfo[target]; scsi = &cts->proto_specific.scsi; spi = &cts->xport_specific.spi; if ((scsi->valid & CTS_SCSI_VALID_TQ) != 0) { if ((sc->sc_cfflags & (1<<((target & 7) + 16))) == 0 && (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB)) { NCR_MISC(("%s: target %d: tagged queuing\n", device_get_nameunit(sc->sc_dev), target)); ti->flags |= T_TAG; } else ti->flags &= ~T_TAG; } if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0) { NCR_MISC(("%s: target %d: wide negotiation\n", device_get_nameunit(sc->sc_dev), target)); ti->goal.width = spi->bus_width; } if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) != 0) { NCR_MISC(("%s: target %d: sync period negotiation\n", device_get_nameunit(sc->sc_dev), target)); ti->goal.period = spi->sync_period; } if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0) { NCR_MISC(("%s: target %d: sync offset negotiation\n", device_get_nameunit(sc->sc_dev), target)); ti->goal.offset = spi->sync_offset; } ccb->ccb_h.status = CAM_REQ_CMP; break; default: device_printf(sc->sc_dev, "Unhandled function code %d\n", ccb->ccb_h.func_code); ccb->ccb_h.status = CAM_PROVIDE_FAIL; } done: xpt_done(ccb); } /* * Used when interrupt driven I/O is not allowed, e.g. during boot. */ static void ncr53c9x_poll(struct cam_sim *sim) { struct ncr53c9x_softc *sc; sc = cam_sim_softc(sim); NCR_LOCK_ASSERT(sc, MA_OWNED); NCR_TRACE(("[%s] ", __func__)); if (NCRDMA_ISINTR(sc)) ncr53c9x_intr1(sc); } /* * Asynchronous notification handler */ static void ncr53c9x_async(void *cbarg, uint32_t code, struct cam_path *path, void *arg) { struct ncr53c9x_softc *sc; struct ncr53c9x_tinfo *ti; int target; sc = cam_sim_softc(cbarg); NCR_LOCK_ASSERT(sc, MA_OWNED); switch (code) { case AC_LOST_DEVICE: target = xpt_path_target_id(path); if (target < 0 || target >= sc->sc_ntarg) break; /* Cancel outstanding disconnected commands. */ ncr53c9x_clear_target(sc, target, CAM_REQ_ABORTED); /* Set the default parameters for the target. */ ti = &sc->sc_tinfo[target]; /* XXX - config flags per target: low bits: no reselect; high bits: no synch */ ti->flags = ((sc->sc_minsync != 0 && (sc->sc_cfflags & (1 << ((target & 7) + 8))) == 0) ? 0 : T_SYNCHOFF) | ((sc->sc_cfflags & (1 << (target & 7))) == 0 ? 0 : T_RSELECTOFF); ti->curr.period = ti->goal.period = 0; ti->curr.offset = ti->goal.offset = 0; ti->curr.width = ti->goal.width = MSG_EXT_WDTR_BUS_8_BIT; break; } } /* * 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 ncr53c9x_action and ncr53c9x_done. * This may save us an unnecessary interrupt just to get things going. * Should only be called when state == NCR_IDLE and with sc_lock held. */ static void ncr53c9x_sched(struct ncr53c9x_softc *sc) { struct ncr53c9x_ecb *ecb; struct ncr53c9x_linfo *li; struct ncr53c9x_tinfo *ti; int lun, tag; NCR_LOCK_ASSERT(sc, MA_OWNED); NCR_TRACE(("[%s] ", __func__)); if (sc->sc_state != NCR_IDLE) panic("%s: not IDLE (state=%d)", __func__, sc->sc_state); /* * Find first ecb in ready queue that is for a target/lunit * combinations that is not busy. */ TAILQ_FOREACH(ecb, &sc->ready_list, chain) { ti = &sc->sc_tinfo[ecb->ccb->ccb_h.target_id]; lun = ecb->ccb->ccb_h.target_lun; /* Select type of tag for this command */ if ((ti->flags & (T_RSELECTOFF | T_TAG)) != T_TAG) tag = 0; else if ((ecb->flags & ECB_SENSE) != 0) tag = 0; else if ((ecb->ccb->ccb_h.flags & CAM_TAG_ACTION_VALID) == 0) tag = 0; else if (ecb->ccb->csio.tag_action == CAM_TAG_ACTION_NONE) tag = 0; else tag = ecb->ccb->csio.tag_action; li = TINFO_LUN(ti, lun); if (li == NULL) { /* Initialize LUN info and add to list. */ li = malloc(sizeof(*li), M_DEVBUF, M_NOWAIT | M_ZERO); if (li == NULL) continue; li->lun = lun; LIST_INSERT_HEAD(&ti->luns, li, link); if (lun < NCR_NLUN) ti->lun[lun] = li; } li->last_used = time_second; if (tag == 0) { /* Try to issue this as an untagged command. */ if (li->untagged == NULL) li->untagged = ecb; } if (li->untagged != NULL) { tag = 0; if ((li->busy != 1) && li->used == 0) { /* * We need to issue this untagged command * now. */ ecb = li->untagged; } else { /* not ready, yet */ continue; } } ecb->tag[0] = tag; if (tag != 0) { li->queued[ecb->tag_id] = ecb; ecb->tag[1] = ecb->tag_id; li->used++; } if (li->untagged != NULL && (li->busy != 1)) { li->busy = 1; TAILQ_REMOVE(&sc->ready_list, ecb, chain); ecb->flags &= ~ECB_READY; sc->sc_nexus = ecb; ncr53c9x_select(sc, ecb); break; } if (li->untagged == NULL && tag != 0) { TAILQ_REMOVE(&sc->ready_list, ecb, chain); ecb->flags &= ~ECB_READY; sc->sc_nexus = ecb; ncr53c9x_select(sc, ecb); break; } else NCR_TRACE(("[%s %d:%d busy] \n", __func__, ecb->ccb->ccb_h.target_id, ecb->ccb->ccb_h.target_lun)); } } static void ncr53c9x_sense(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb) { union ccb *ccb = ecb->ccb; struct ncr53c9x_linfo *li; struct ncr53c9x_tinfo *ti; struct scsi_request_sense *ss = (void *)&ecb->cmd.cmd; int lun; NCR_LOCK_ASSERT(sc, MA_OWNED); NCR_TRACE(("[%s] ", __func__)); lun = ccb->ccb_h.target_lun; ti = &sc->sc_tinfo[ccb->ccb_h.target_id]; /* Next, setup a REQUEST SENSE command block. */ memset(ss, 0, sizeof(*ss)); ss->opcode = REQUEST_SENSE; ss->byte2 = ccb->ccb_h.target_lun << SCSI_CMD_LUN_SHIFT; ss->length = sizeof(struct scsi_sense_data); ecb->clen = sizeof(*ss); memset(&ccb->csio.sense_data, 0, sizeof(ccb->csio.sense_data)); ecb->daddr = (uint8_t *)&ccb->csio.sense_data; ecb->dleft = sizeof(struct scsi_sense_data); ecb->flags |= ECB_SENSE; ecb->timeout = NCR_SENSE_TIMEOUT; ti->senses++; li = TINFO_LUN(ti, lun); if (li->busy) li->busy = 0; ncr53c9x_dequeue(sc, ecb); li->untagged = ecb; /* Must be executed first to fix C/A. */ li->busy = 2; if (ecb == sc->sc_nexus) ncr53c9x_select(sc, ecb); else { TAILQ_INSERT_HEAD(&sc->ready_list, ecb, chain); ecb->flags |= ECB_READY; if (sc->sc_state == NCR_IDLE) ncr53c9x_sched(sc); } } /* * POST PROCESSING OF SCSI_CMD (usually current) */ static void ncr53c9x_done(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb) { union ccb *ccb = ecb->ccb; struct ncr53c9x_linfo *li; struct ncr53c9x_tinfo *ti; int lun, sense_returned; NCR_LOCK_ASSERT(sc, MA_OWNED); NCR_TRACE(("[%s(status:%x)] ", __func__, ccb->ccb_h.status)); ti = &sc->sc_tinfo[ccb->ccb_h.target_id]; lun = ccb->ccb_h.target_lun; li = TINFO_LUN(ti, lun); callout_stop(&ecb->ch); /* * Now, if we've come here with no error code, i.e. we've kept the * initial CAM_REQ_CMP, 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 (ccb->ccb_h.status == CAM_REQ_CMP) { ccb->csio.scsi_status = ecb->stat; if ((ecb->flags & ECB_ABORT) != 0) ccb->ccb_h.status = CAM_CMD_TIMEOUT; else if ((ecb->flags & ECB_SENSE) != 0 && (ecb->stat != SCSI_STATUS_CHECK_COND)) { ccb->csio.scsi_status = SCSI_STATUS_CHECK_COND; ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID; sense_returned = sizeof(ccb->csio.sense_data) - ecb->dleft; if (sense_returned < ccb->csio.sense_len) ccb->csio.sense_resid = ccb->csio.sense_len - sense_returned; else ccb->csio.sense_resid = 0; } else if (ecb->stat == SCSI_STATUS_CHECK_COND) { if ((ecb->flags & ECB_SENSE) != 0) ccb->ccb_h.status = CAM_AUTOSENSE_FAIL; else { /* First, save the return values. */ ccb->csio.resid = ecb->dleft; if ((ccb->ccb_h.flags & CAM_DIS_AUTOSENSE) == 0) { ncr53c9x_sense(sc, ecb); return; } ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR; } } else ccb->csio.resid = ecb->dleft; if (ecb->stat == SCSI_STATUS_QUEUE_FULL) ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR; else if (ecb->stat == SCSI_STATUS_BUSY) ccb->ccb_h.status = CAM_SCSI_BUSY; } else if ((ccb->ccb_h.status & CAM_DEV_QFRZN) == 0) { ccb->ccb_h.status |= CAM_DEV_QFRZN; xpt_freeze_devq(ccb->ccb_h.path, 1); } #ifdef NCR53C9X_DEBUG if ((ncr53c9x_debug & NCR_SHOWTRAC) != 0) { if (ccb->csio.resid != 0) printf("resid=%d ", ccb->csio.resid); if ((ccb->ccb_h.status & CAM_AUTOSNS_VALID) != 0) printf("sense=0x%02x\n", ccb->csio.sense_data.error_code); else printf("status SCSI=0x%x CAM=0x%x\n", ccb->csio.scsi_status, ccb->ccb_h.status); } #endif /* * Remove the ECB from whatever queue it's on. */ ncr53c9x_dequeue(sc, ecb); if (ecb == sc->sc_nexus) { sc->sc_nexus = NULL; if (sc->sc_state != NCR_CLEANING) { sc->sc_state = NCR_IDLE; ncr53c9x_sched(sc); } } if ((ccb->ccb_h.status & CAM_SEL_TIMEOUT) != 0) { /* Selection timeout -- discard this LUN if empty. */ if (li->untagged == NULL && li->used == 0) { if (lun < NCR_NLUN) ti->lun[lun] = NULL; LIST_REMOVE(li, link); free(li, M_DEVBUF); } } ncr53c9x_free_ecb(sc, ecb); ti->cmds++; xpt_done(ccb); } static void ncr53c9x_dequeue(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb) { struct ncr53c9x_linfo *li; struct ncr53c9x_tinfo *ti; int64_t lun; NCR_LOCK_ASSERT(sc, MA_OWNED); ti = &sc->sc_tinfo[ecb->ccb->ccb_h.target_id]; lun = ecb->ccb->ccb_h.target_lun; li = TINFO_LUN(ti, lun); #ifdef DIAGNOSTIC if (li == NULL || li->lun != lun) panic("%s: lun %llx for ecb %p does not exist", __func__, (long long)lun, ecb); #endif if (li->untagged == ecb) { li->busy = 0; li->untagged = NULL; } if (ecb->tag[0] && li->queued[ecb->tag[1]] != NULL) { #ifdef DIAGNOSTIC if (li->queued[ecb->tag[1]] != NULL && (li->queued[ecb->tag[1]] != ecb)) panic("%s: slot %d for lun %llx has %p instead of ecb " "%p", __func__, ecb->tag[1], (long long)lun, li->queued[ecb->tag[1]], ecb); #endif li->queued[ecb->tag[1]] = NULL; li->used--; } ecb->tag[0] = ecb->tag[1] = 0; if ((ecb->flags & ECB_READY) != 0) { ecb->flags &= ~ECB_READY; 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 ncr53c9x_sched_msgout(m) do { \ NCR_MSGS(("ncr53c9x_sched_msgout %x %d", m, __LINE__)); \ NCRCMD(sc, NCRCMD_SETATN); \ sc->sc_flags |= NCR_ATN; \ sc->sc_msgpriq |= (m); \ } while (/* CONSTCOND */0) static void ncr53c9x_flushfifo(struct ncr53c9x_softc *sc) { NCR_LOCK_ASSERT(sc, MA_OWNED); NCR_TRACE(("[%s] ", __func__)); NCRCMD(sc, NCRCMD_FLUSH); if (sc->sc_phase == COMMAND_PHASE || sc->sc_phase == MESSAGE_OUT_PHASE) DELAY(2); } static int ncr53c9x_rdfifo(struct ncr53c9x_softc *sc, int how) { int i, n; uint8_t *ibuf; NCR_LOCK_ASSERT(sc, MA_OWNED); switch (how) { case NCR_RDFIFO_START: ibuf = sc->sc_imess; sc->sc_imlen = 0; break; case NCR_RDFIFO_CONTINUE: ibuf = sc->sc_imess + sc->sc_imlen; break; default: panic("%s: bad flag", __func__); /* NOTREACHED */ } /* * XXX buffer (sc_imess) size for message */ n = NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF; if (sc->sc_rev == NCR_VARIANT_FAS366) { n *= 2; for (i = 0; i < n; i++) ibuf[i] = NCR_READ_REG(sc, NCR_FIFO); if (sc->sc_espstat2 & NCRFAS_STAT2_ISHUTTLE) { NCR_WRITE_REG(sc, NCR_FIFO, 0); ibuf[i++] = NCR_READ_REG(sc, NCR_FIFO); NCR_READ_REG(sc, NCR_FIFO); ncr53c9x_flushfifo(sc); } } else for (i = 0; i < n; i++) ibuf[i] = NCR_READ_REG(sc, NCR_FIFO); sc->sc_imlen += i; #if 0 #ifdef NCR53C9X_DEBUG NCR_TRACE(("\n[rdfifo %s (%d):", (how == NCR_RDFIFO_START) ? "start" : "cont", (int)sc->sc_imlen)); if ((ncr53c9x_debug & NCR_SHOWTRAC) != 0) { for (i = 0; i < sc->sc_imlen; i++) printf(" %02x", sc->sc_imess[i]); printf("]\n"); } #endif #endif return (sc->sc_imlen); } static void ncr53c9x_wrfifo(struct ncr53c9x_softc *sc, uint8_t *p, int len) { int i; NCR_LOCK_ASSERT(sc, MA_OWNED); #ifdef NCR53C9X_DEBUG NCR_MSGS(("[wrfifo(%d):", len)); if ((ncr53c9x_debug & NCR_SHOWMSGS) != 0) { for (i = 0; i < len; i++) printf(" %02x", p[i]); printf("]\n"); } #endif for (i = 0; i < len; i++) { NCR_WRITE_REG(sc, NCR_FIFO, p[i]); if (sc->sc_rev == NCR_VARIANT_FAS366) NCR_WRITE_REG(sc, NCR_FIFO, 0); } } static int ncr53c9x_reselect(struct ncr53c9x_softc *sc, int message, int tagtype, int tagid) { struct ncr53c9x_ecb *ecb = NULL; struct ncr53c9x_linfo *li; struct ncr53c9x_tinfo *ti; uint8_t lun, selid, target; NCR_LOCK_ASSERT(sc, MA_OWNED); if (sc->sc_rev == NCR_VARIANT_FAS366) target = sc->sc_selid; else { /* * 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)) { device_printf(sc->sc_dev, "reselect with invalid " "selid %02x; sending DEVICE RESET\n", selid); goto reset; } target = ffs(selid) - 1; } lun = message & 0x07; /* * Search wait queue for disconnected command. * The list should be short, so I haven't bothered with * any more sophisticated structures than a simple * singly linked list. */ ti = &sc->sc_tinfo[target]; li = TINFO_LUN(ti, lun); /* * We can get as far as the LUN with the IDENTIFY * message. Check to see if we're running an * untagged command. Otherwise ack the IDENTIFY * and wait for a tag message. */ if (li != NULL) { if (li->untagged != NULL && li->busy) ecb = li->untagged; else if (tagtype != MSG_SIMPLE_Q_TAG) { /* Wait for tag to come by. */ sc->sc_state = NCR_IDENTIFIED; return (0); } else if (tagtype) ecb = li->queued[tagid]; } if (ecb == NULL) { device_printf(sc->sc_dev, "reselect from target %d lun %d " "tag %x:%x with no nexus; sending ABORT\n", target, lun, tagtype, tagid); goto abort; } /* Make this nexus active again. */ sc->sc_state = NCR_CONNECTED; sc->sc_nexus = ecb; ncr53c9x_setsync(sc, ti); if (ecb->flags & ECB_RESET) ncr53c9x_sched_msgout(SEND_DEV_RESET); else if (ecb->flags & ECB_ABORT) ncr53c9x_sched_msgout(SEND_ABORT); /* Do an implicit RESTORE POINTERS. */ sc->sc_dp = ecb->daddr; sc->sc_dleft = ecb->dleft; return (0); reset: ncr53c9x_sched_msgout(SEND_DEV_RESET); return (1); abort: ncr53c9x_sched_msgout(SEND_ABORT); return (1); } /* From NetBSD; these should go into CAM at some point. */ #define MSG_ISEXTENDED(m) ((m) == MSG_EXTENDED) #define MSG_IS1BYTE(m) \ ((!MSG_ISEXTENDED(m) && (m) < 0x20) || MSG_ISIDENTIFY(m)) #define MSG_IS2BYTE(m) (((m) & 0xf0) == 0x20) static inline int __verify_msg_format(uint8_t *p, int len) { if (len == 1 && MSG_IS1BYTE(p[0])) return (1); if (len == 2 && MSG_IS2BYTE(p[0])) return (1); if (len >= 3 && MSG_ISEXTENDED(p[0]) && len == p[1] + 2) return (1); return (0); } /* * Get an incoming message as initiator. * * The SCSI bus must already be in MESSAGE_IN_PHASE and there is a * byte in the FIFO. */ static void ncr53c9x_msgin(struct ncr53c9x_softc *sc) { struct ncr53c9x_ecb *ecb; struct ncr53c9x_linfo *li; struct ncr53c9x_tinfo *ti; uint8_t *pb; int len, lun; NCR_LOCK_ASSERT(sc, MA_OWNED); NCR_TRACE(("[%s(curmsglen:%ld)] ", __func__, (long)sc->sc_imlen)); if (sc->sc_imlen == 0) { device_printf(sc->sc_dev, "msgin: no msg byte available\n"); 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_state != NCR_RESELECTED) { device_printf(sc->sc_dev, "phase change, dropping message, " "prev %d, state %d\n", sc->sc_prevphase, sc->sc_state); sc->sc_flags &= ~NCR_DROP_MSGI; sc->sc_imlen = 0; } /* * 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 & NCR_DROP_MSGI) != 0) { NCRCMD(sc, NCRCMD_MSGOK); device_printf(sc->sc_dev, "", sc->sc_imess[sc->sc_imlen]); return; } if (sc->sc_imlen >= NCR_MAX_MSG_LEN) { ncr53c9x_sched_msgout(SEND_REJECT); sc->sc_flags |= NCR_DROP_MSGI; } else { switch (sc->sc_state) { /* * if received message is the first of reselection * then first byte is selid, and then message */ case NCR_RESELECTED: pb = sc->sc_imess + 1; len = sc->sc_imlen - 1; break; default: pb = sc->sc_imess; len = sc->sc_imlen; } if (__verify_msg_format(pb, len)) goto gotit; } /* Acknowledge what we have so far. */ NCRCMD(sc, NCRCMD_MSGOK); return; gotit: NCR_MSGS(("gotmsg(%x) state %d", sc->sc_imess[0], sc->sc_state)); /* * We got a complete message, flush the imess. * XXX nobody uses imlen below. */ sc->sc_imlen = 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 * NCR_MAX_MSG_LEN. Longer messages will be amputated. */ switch (sc->sc_state) { case NCR_CONNECTED: ecb = sc->sc_nexus; ti = &sc->sc_tinfo[ecb->ccb->ccb_h.target_id]; switch (sc->sc_imess[0]) { case MSG_CMDCOMPLETE: NCR_MSGS(("cmdcomplete ")); if (sc->sc_dleft < 0) { xpt_print_path(ecb->ccb->ccb_h.path); printf("got %ld extra bytes\n", -(long)sc->sc_dleft); sc->sc_dleft = 0; } ecb->dleft = (ecb->flags & ECB_TENTATIVE_DONE) ? 0 : sc->sc_dleft; if ((ecb->flags & ECB_SENSE) == 0) ecb->ccb->csio.resid = ecb->dleft; sc->sc_state = NCR_CMDCOMPLETE; break; case MSG_MESSAGE_REJECT: NCR_MSGS(("msg reject (msgout=%x) ", sc->sc_msgout)); switch (sc->sc_msgout) { case SEND_TAG: /* * Target does not like tagged queuing. * - Flush the command queue * - Disable tagged queuing for the target * - Dequeue ecb from the queued array. */ device_printf(sc->sc_dev, "tagged queuing " "rejected: target %d\n", ecb->ccb->ccb_h.target_id); NCR_MSGS(("(rejected sent tag)")); NCRCMD(sc, NCRCMD_FLUSH); DELAY(1); ti->flags &= ~T_TAG; lun = ecb->ccb->ccb_h.target_lun; li = TINFO_LUN(ti, lun); if (ecb->tag[0] && li->queued[ecb->tag[1]] != NULL) { li->queued[ecb->tag[1]] = NULL; li->used--; } ecb->tag[0] = ecb->tag[1] = 0; li->untagged = ecb; li->busy = 1; break; case SEND_SDTR: device_printf(sc->sc_dev, "sync transfer " "rejected: target %d\n", ecb->ccb->ccb_h.target_id); ti->flags &= ~T_SDTRSENT; ti->curr.period = ti->goal.period = 0; ti->curr.offset = ti->goal.offset = 0; ncr53c9x_setsync(sc, ti); break; case SEND_WDTR: device_printf(sc->sc_dev, "wide transfer " "rejected: target %d\n", ecb->ccb->ccb_h.target_id); ti->flags &= ~T_WDTRSENT; ti->curr.width = ti->goal.width = MSG_EXT_WDTR_BUS_8_BIT; ncr53c9x_setsync(sc, ti); break; case SEND_INIT_DET_ERR: goto abort; } break; case MSG_NOOP: NCR_MSGS(("noop ")); break; case MSG_HEAD_OF_Q_TAG: case MSG_SIMPLE_Q_TAG: case MSG_ORDERED_Q_TAG: NCR_MSGS(("TAG %x:%x", sc->sc_imess[0], sc->sc_imess[1])); break; case MSG_DISCONNECT: NCR_MSGS(("disconnect ")); ti->dconns++; sc->sc_state = NCR_DISCONNECT; /* * Mark the fact that all bytes have moved. The * target may not bother to do a SAVE POINTERS * at this stage. This flag will set the residual * count to zero on MSG COMPLETE. */ if (sc->sc_dleft == 0) ecb->flags |= ECB_TENTATIVE_DONE; break; case MSG_SAVEDATAPOINTER: NCR_MSGS(("save datapointer ")); ecb->daddr = sc->sc_dp; ecb->dleft = sc->sc_dleft; break; case MSG_RESTOREPOINTERS: NCR_MSGS(("restore datapointer ")); sc->sc_dp = ecb->daddr; sc->sc_dleft = ecb->dleft; break; case MSG_IGN_WIDE_RESIDUE: NCR_MSGS(("ignore wide residue (%d bytes)", sc->sc_imess[1])); if (sc->sc_imess[1] != 1) { xpt_print_path(ecb->ccb->ccb_h.path); printf("unexpected MESSAGE IGNORE WIDE " "RESIDUE (%d bytes); sending REJECT\n", sc->sc_imess[1]); goto reject; } /* * If there was a last transfer of an even number of * bytes, wipe the "done" memory and adjust by one * byte (sc->sc_imess[1]). */ len = sc->sc_dleft - ecb->dleft; if (len != 0 && (len & 1) == 0) { ecb->flags &= ~ECB_TENTATIVE_DONE; sc->sc_dp = (char *)sc->sc_dp - 1; sc->sc_dleft--; } break; case MSG_EXTENDED: NCR_MSGS(("extended(%x) ", sc->sc_imess[2])); switch (sc->sc_imess[2]) { case MSG_EXT_SDTR: NCR_MSGS(("SDTR period %d, offset %d ", sc->sc_imess[3], sc->sc_imess[4])); if (sc->sc_imess[1] != 3) goto reject; ti->curr.period = sc->sc_imess[3]; ti->curr.offset = sc->sc_imess[4]; if (sc->sc_minsync == 0 || ti->curr.offset == 0 || ti->curr.period > 124) { #if 0 #ifdef NCR53C9X_DEBUG xpt_print_path(ecb->ccb->ccb_h.path); printf("async mode\n"); #endif #endif if ((ti->flags & T_SDTRSENT) == 0) { /* * target initiated negotiation */ ti->curr.offset = 0; ncr53c9x_sched_msgout( SEND_SDTR); } } else { ti->curr.period = ncr53c9x_cpb2stp(sc, ncr53c9x_stp2cpb(sc, ti->curr.period)); if ((ti->flags & T_SDTRSENT) == 0) { /* * target initiated negotiation */ if (ti->curr.period < sc->sc_minsync) ti->curr.period = sc->sc_minsync; if (ti->curr.offset > sc->sc_maxoffset) ti->curr.offset = sc->sc_maxoffset; ncr53c9x_sched_msgout( SEND_SDTR); } } ti->flags &= ~T_SDTRSENT; ti->goal.period = ti->curr.period; ti->goal.offset = ti->curr.offset; ncr53c9x_setsync(sc, ti); break; case MSG_EXT_WDTR: NCR_MSGS(("wide mode %d ", sc->sc_imess[3])); ti->curr.width = sc->sc_imess[3]; if (!(ti->flags & T_WDTRSENT)) /* * target initiated negotiation */ ncr53c9x_sched_msgout(SEND_WDTR); ti->flags &= ~T_WDTRSENT; ti->goal.width = ti->curr.width; ncr53c9x_setsync(sc, ti); break; default: xpt_print_path(ecb->ccb->ccb_h.path); printf("unrecognized MESSAGE EXTENDED 0x%x;" " sending REJECT\n", sc->sc_imess[2]); goto reject; } break; default: NCR_MSGS(("ident ")); xpt_print_path(ecb->ccb->ccb_h.path); printf("unrecognized MESSAGE 0x%x; sending REJECT\n", sc->sc_imess[0]); /* FALLTHROUGH */ reject: ncr53c9x_sched_msgout(SEND_REJECT); break; } break; case NCR_IDENTIFIED: /* * IDENTIFY message was received and queue tag is expected * now. */ if ((sc->sc_imess[0] != MSG_SIMPLE_Q_TAG) || (sc->sc_msgify == 0)) { device_printf(sc->sc_dev, "TAG reselect without " "IDENTIFY; MSG %x; sending DEVICE RESET\n", sc->sc_imess[0]); goto reset; } (void)ncr53c9x_reselect(sc, sc->sc_msgify, sc->sc_imess[0], sc->sc_imess[1]); break; case NCR_RESELECTED: if (MSG_ISIDENTIFY(sc->sc_imess[1])) sc->sc_msgify = sc->sc_imess[1]; else { device_printf(sc->sc_dev, "reselect without IDENTIFY;" " MSG %x; sending DEVICE RESET\n", sc->sc_imess[1]); goto reset; } (void)ncr53c9x_reselect(sc, sc->sc_msgify, 0, 0); break; default: device_printf(sc->sc_dev, "unexpected MESSAGE IN; " "sending DEVICE RESET\n"); /* FALLTHROUGH */ reset: ncr53c9x_sched_msgout(SEND_DEV_RESET); break; abort: ncr53c9x_sched_msgout(SEND_ABORT); } /* If we have more messages to send set ATN. */ if (sc->sc_msgpriq) { NCRCMD(sc, NCRCMD_SETATN); sc->sc_flags |= NCR_ATN; } /* Acknowledge last message byte. */ NCRCMD(sc, NCRCMD_MSGOK); /* Done, reset message pointer. */ sc->sc_flags &= ~NCR_DROP_MSGI; sc->sc_imlen = 0; } /* * Send the highest priority, scheduled message. */ static void ncr53c9x_msgout(struct ncr53c9x_softc *sc) { struct ncr53c9x_tinfo *ti; struct ncr53c9x_ecb *ecb; size_t size; int error; #ifdef NCR53C9X_DEBUG int i; #endif NCR_LOCK_ASSERT(sc, MA_OWNED); NCR_TRACE(("[%s(priq:%x, prevphase:%x)]", __func__, sc->sc_msgpriq, sc->sc_prevphase)); /* * XXX - the NCR_ATN flag is not in sync with the actual ATN * condition on the SCSI bus. The 53c9x chip * automatically turns off ATN before sending the * message byte. (See also the comment below in the * default case when picking out a message to send.) */ if (sc->sc_flags & NCR_ATN) { if (sc->sc_prevphase != MESSAGE_OUT_PHASE) { new: NCRCMD(sc, NCRCMD_FLUSH); #if 0 DELAY(1); #endif sc->sc_msgoutq = 0; sc->sc_omlen = 0; } } else { if (sc->sc_prevphase == MESSAGE_OUT_PHASE) { ncr53c9x_sched_msgout(sc->sc_msgoutq); goto new; } else device_printf(sc->sc_dev, "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->ccb->ccb_h.target_id]; sc->sc_omess[0] = MSG_EXTENDED; sc->sc_omess[1] = MSG_EXT_SDTR_LEN; sc->sc_omess[2] = MSG_EXT_SDTR; sc->sc_omess[3] = ti->goal.period; sc->sc_omess[4] = ti->goal.offset; sc->sc_omlen = 5; break; case SEND_WDTR: ecb = sc->sc_nexus; ti = &sc->sc_tinfo[ecb->ccb->ccb_h.target_id]; sc->sc_omess[0] = MSG_EXTENDED; sc->sc_omess[1] = MSG_EXT_WDTR_LEN; sc->sc_omess[2] = MSG_EXT_WDTR; sc->sc_omess[3] = ti->goal.width; sc->sc_omlen = 4; break; case SEND_IDENTIFY: if (sc->sc_state != NCR_CONNECTED) device_printf(sc->sc_dev, "at line %d: no " "nexus\n", __LINE__); ecb = sc->sc_nexus; sc->sc_omess[0] = MSG_IDENTIFY(ecb->ccb->ccb_h.target_lun, 0); break; case SEND_TAG: if (sc->sc_state != NCR_CONNECTED) device_printf(sc->sc_dev, "at line %d: no " "nexus\n", __LINE__); ecb = sc->sc_nexus; sc->sc_omess[0] = ecb->tag[0]; sc->sc_omess[1] = ecb->tag[1]; sc->sc_omlen = 2; break; case SEND_DEV_RESET: sc->sc_flags |= NCR_ABORTING; sc->sc_omess[0] = MSG_BUS_DEV_RESET; ecb = sc->sc_nexus; ti = &sc->sc_tinfo[ecb->ccb->ccb_h.target_id]; ti->curr.period = 0; ti->curr.offset = 0; ti->curr.width = MSG_EXT_WDTR_BUS_8_BIT; break; case SEND_PARITY_ERROR: sc->sc_omess[0] = MSG_PARITY_ERROR; break; case SEND_ABORT: sc->sc_flags |= NCR_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: /* * We normally do not get here, since the chip * automatically turns off ATN before the last * byte of a message is sent to the target. * However, if the target rejects our (multi-byte) * message early by switching to MSG IN phase * ATN remains on, so the target may return to * MSG OUT phase. If there are no scheduled messages * left we send a NO-OP. * * XXX - Note that this leaves no useful purpose for * the NCR_ATN flag. */ sc->sc_flags &= ~NCR_ATN; sc->sc_omess[0] = MSG_NOOP; } sc->sc_omp = sc->sc_omess; } #ifdef NCR53C9X_DEBUG if ((ncr53c9x_debug & NCR_SHOWMSGS) != 0) { NCR_MSGS(("sc_omlen; i++) NCR_MSGS((" %02x", sc->sc_omess[i])); NCR_MSGS(("> ")); } #endif if (sc->sc_rev != NCR_VARIANT_FAS366) { /* (Re)send the message. */ size = ulmin(sc->sc_omlen, sc->sc_maxxfer); error = NCRDMA_SETUP(sc, &sc->sc_omp, &sc->sc_omlen, 0, &size); if (error != 0) goto cmd; /* Program the SCSI counter. */ NCR_SET_COUNT(sc, size); /* Load the count in and start the message-out transfer. */ NCRCMD(sc, NCRCMD_NOP | NCRCMD_DMA); NCRCMD(sc, NCRCMD_TRANS | NCRCMD_DMA); NCRDMA_GO(sc); return; } cmd: /* * XXX FIFO size */ sc->sc_cmdlen = 0; ncr53c9x_flushfifo(sc); ncr53c9x_wrfifo(sc, sc->sc_omp, sc->sc_omlen); NCRCMD(sc, NCRCMD_TRANS); } void ncr53c9x_intr(void *arg) { struct ncr53c9x_softc *sc = arg; if (!NCRDMA_ISINTR(sc)) return; NCR_LOCK(sc); ncr53c9x_intr1(sc); NCR_UNLOCK(sc); } /* * 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. */ static void ncr53c9x_intr1(struct ncr53c9x_softc *sc) { struct ncr53c9x_ecb *ecb; struct ncr53c9x_linfo *li; struct ncr53c9x_tinfo *ti; struct timeval cur, wait; size_t size; int error, i, nfifo; uint8_t msg; NCR_LOCK_ASSERT(sc, MA_OWNED); NCR_INTS(("[ncr53c9x_intr: state %d]", sc->sc_state)); again: /* and what do the registers say... */ ncr53c9x_readregs(sc); /* * 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 * "NCR_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? */ if ((sc->sc_espintr & NCRINTR_SBR) != 0) { if ((NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF) != 0) { NCRCMD(sc, NCRCMD_FLUSH); DELAY(1); } if (sc->sc_state != NCR_SBR) { device_printf(sc->sc_dev, "SCSI bus reset\n"); ncr53c9x_init(sc, 0); /* Restart everything. */ return; } #if 0 /*XXX*/ device_printf(sc->sc_dev, "\n", sc->sc_espintr, sc->sc_espstat, sc->sc_espstep); #endif if (sc->sc_nexus != NULL) panic("%s: nexus in reset state", device_get_nameunit(sc->sc_dev)); goto sched; } ecb = sc->sc_nexus; #define NCRINTR_ERR (NCRINTR_SBR | NCRINTR_ILL) if (sc->sc_espintr & NCRINTR_ERR || sc->sc_espstat & NCRSTAT_GE) { if ((sc->sc_espstat & NCRSTAT_GE) != 0) { /* Gross Error; no target? */ if (NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF) { NCRCMD(sc, NCRCMD_FLUSH); DELAY(1); } if (sc->sc_state == NCR_CONNECTED || sc->sc_state == NCR_SELECTING) { ecb->ccb->ccb_h.status = CAM_SEL_TIMEOUT; ncr53c9x_done(sc, ecb); } return; } if ((sc->sc_espintr & NCRINTR_ILL) != 0) { if ((sc->sc_flags & NCR_EXPECT_ILLCMD) != 0) { /* * Eat away "Illegal command" interrupt * on a ESP100 caused by a re-selection * while we were trying to select * another target. */ #ifdef NCR53C9X_DEBUG device_printf(sc->sc_dev, "ESP100 work-around " "activated\n"); #endif sc->sc_flags &= ~NCR_EXPECT_ILLCMD; return; } /* Illegal command, out of sync? */ device_printf(sc->sc_dev, "illegal command: 0x%x " "(state %d, phase %x, prevphase %x)\n", sc->sc_lastcmd, sc->sc_state, sc->sc_phase, sc->sc_prevphase); if (NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF) { NCRCMD(sc, NCRCMD_FLUSH); DELAY(1); } goto reset; } } sc->sc_flags &= ~NCR_EXPECT_ILLCMD; /* * 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 (NCRDMA_ISACTIVE(sc)) { if (NCRDMA_INTR(sc) == -1) { device_printf(sc->sc_dev, "DMA error; resetting\n"); goto reset; } /* If DMA active here, then go back to work... */ if (NCRDMA_ISACTIVE(sc)) return; if ((sc->sc_espstat & NCRSTAT_TC) == 0) { /* * DMA not completed. If we can not find a * acceptable explanation, print a diagnostic. */ if (sc->sc_state == NCR_SELECTING) /* * This can happen if we are reselected * while using DMA to select a target. */ /*void*/; else if (sc->sc_prevphase == MESSAGE_OUT_PHASE) { /* * Our (multi-byte) message (eg SDTR) was * interrupted by the target to send * a MSG REJECT. * Print diagnostic if current phase * is not MESSAGE IN. */ if (sc->sc_phase != MESSAGE_IN_PHASE) device_printf(sc->sc_dev,"!TC on MSGOUT" " [intr %x, stat %x, step %d]" " prevphase %x, resid %lx\n", sc->sc_espintr, sc->sc_espstat, sc->sc_espstep, sc->sc_prevphase, (u_long)sc->sc_omlen); } else if (sc->sc_dleft == 0) { /* * The DMA operation was started for * a DATA transfer. Print a diagnostic * if the DMA counter and TC bit * appear to be out of sync. * * XXX This is fatal and usually means that * the DMA engine is hopelessly out of * sync with reality. A disk is likely * getting spammed at this point. */ device_printf(sc->sc_dev, "!TC on DATA XFER" " [intr %x, stat %x, step %d]" " prevphase %x, resid %x\n", sc->sc_espintr, sc->sc_espstat, sc->sc_espstep, sc->sc_prevphase, ecb ? ecb->dleft : -1); goto reset; } } } /* * Check for less serious errors. */ if ((sc->sc_espstat & NCRSTAT_PE) != 0) { device_printf(sc->sc_dev, "SCSI bus parity error\n"); if (sc->sc_prevphase == MESSAGE_IN_PHASE) ncr53c9x_sched_msgout(SEND_PARITY_ERROR); else ncr53c9x_sched_msgout(SEND_INIT_DET_ERR); } if ((sc->sc_espintr & NCRINTR_DIS) != 0) { sc->sc_msgify = 0; NCR_INTS(("", sc->sc_espintr,sc->sc_espstat,sc->sc_espstep)); if (NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF) { NCRCMD(sc, NCRCMD_FLUSH); #if 0 DELAY(1); #endif } /* * This command must (apparently) be issued within * 250mS of a disconnect. So here you are... */ NCRCMD(sc, NCRCMD_ENSEL); switch (sc->sc_state) { case NCR_RESELECTED: goto sched; case NCR_SELECTING: ecb->ccb->ccb_h.status = CAM_SEL_TIMEOUT; /* Selection timeout -- discard all LUNs if empty. */ ti = &sc->sc_tinfo[ecb->ccb->ccb_h.target_id]; li = LIST_FIRST(&ti->luns); while (li != NULL) { if (li->untagged == NULL && li->used == 0) { if (li->lun < NCR_NLUN) ti->lun[li->lun] = NULL; LIST_REMOVE(li, link); free(li, M_DEVBUF); /* * Restart the search at the beginning. */ li = LIST_FIRST(&ti->luns); continue; } li = LIST_NEXT(li, link); } goto finish; case NCR_CONNECTED: if (ecb != NULL) { ti = &sc->sc_tinfo[ecb->ccb->ccb_h.target_id]; if ((ti->flags & T_SDTRSENT) != 0) { xpt_print_path(ecb->ccb->ccb_h.path); printf("sync nego not completed!\n"); ti->flags &= ~T_SDTRSENT; ti->curr.period = ti->goal.period = 0; ti->curr.offset = ti->goal.offset = 0; ncr53c9x_setsync(sc, ti); } if ((ti->flags & T_WDTRSENT) != 0) { xpt_print_path(ecb->ccb->ccb_h.path); printf("wide nego not completed!\n"); ti->flags &= ~T_WDTRSENT; ti->curr.width = ti->goal.width = MSG_EXT_WDTR_BUS_8_BIT; ncr53c9x_setsync(sc, ti); } } /* It may be OK to disconnect. */ if ((sc->sc_flags & NCR_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. */ device_printf(sc->sc_dev, "unexpected " "disconnect [state %d, intr %x, stat %x, " "phase(c %x, p %x)]; ", sc->sc_state, sc->sc_espintr, sc->sc_espstat, sc->sc_phase, sc->sc_prevphase); /* * XXX This will cause a chip reset and will * prevent us from finding out the real * problem with the device. However, it's * necessary until a way can be found to * safely cancel the DMA that is in * progress. */ if (1 || (ecb->flags & ECB_SENSE) != 0) { printf("resetting\n"); goto reset; } printf("sending REQUEST SENSE\n"); callout_stop(&ecb->ch); ncr53c9x_sense(sc, ecb); return; } else if (ecb != NULL && (ecb->flags & ECB_RESET) != 0) { ecb->ccb->ccb_h.status = CAM_REQ_CMP; goto finish; } ecb->ccb->ccb_h.status = CAM_CMD_TIMEOUT; goto finish; case NCR_DISCONNECT: sc->sc_nexus = NULL; goto sched; case NCR_CMDCOMPLETE: ecb->ccb->ccb_h.status = CAM_REQ_CMP; goto finish; } } switch (sc->sc_state) { case NCR_SBR: device_printf(sc->sc_dev, "waiting for Bus Reset to happen\n"); return; case NCR_RESELECTED: /* * We must be continuing a message? */ device_printf(sc->sc_dev, "unhandled reselect continuation, " "state %d, intr %02x\n", sc->sc_state, sc->sc_espintr); goto reset; break; case NCR_IDENTIFIED: ecb = sc->sc_nexus; if (sc->sc_phase != MESSAGE_IN_PHASE) { i = NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF; /* * Things are seriously screwed up. * Pull the brakes, i.e. reset. */ device_printf(sc->sc_dev, "target didn't send tag: %d " "bytes in FIFO\n", i); /* Drain and display FIFO. */ while (i-- > 0) printf("[%d] ", NCR_READ_REG(sc, NCR_FIFO)); goto reset; } else goto msgin; case NCR_IDLE: case NCR_SELECTING: ecb = sc->sc_nexus; if (sc->sc_espintr & NCRINTR_RESEL) { sc->sc_msgpriq = sc->sc_msgout = sc->sc_msgoutq = 0; sc->sc_flags = 0; /* * If we're trying to select a * target ourselves, push our command * back into the ready list. */ if (sc->sc_state == NCR_SELECTING) { NCR_INTS(("backoff selector ")); callout_stop(&ecb->ch); ncr53c9x_dequeue(sc, ecb); TAILQ_INSERT_HEAD(&sc->ready_list, ecb, chain); ecb->flags |= ECB_READY; ecb = sc->sc_nexus = NULL; } sc->sc_state = NCR_RESELECTED; if (sc->sc_phase != MESSAGE_IN_PHASE) { /* * Things are seriously screwed up. * Pull the brakes, i.e. reset */ device_printf(sc->sc_dev, "target didn't " "identify\n"); goto reset; } /* * The C90 only inhibits FIFO writes until reselection * is complete instead of waiting until the interrupt * status register has been read. So, if the reselect * happens while we were entering command bytes (for * another target) some of those bytes can appear in * the FIFO here, after the interrupt is taken. * * To remedy this situation, pull the Selection ID * and Identify message from the FIFO directly, and * ignore any extraneous FIFO contents. Also, set * a flag that allows one Illegal Command Interrupt * to occur which the chip also generates as a result * of writing to the FIFO during a reselect. */ if (sc->sc_rev == NCR_VARIANT_ESP100) { nfifo = NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF; sc->sc_imess[0] = NCR_READ_REG(sc, NCR_FIFO); sc->sc_imess[1] = NCR_READ_REG(sc, NCR_FIFO); sc->sc_imlen = 2; if (nfifo != 2) { /* Flush the rest. */ NCRCMD(sc, NCRCMD_FLUSH); } sc->sc_flags |= NCR_EXPECT_ILLCMD; if (nfifo > 2) nfifo = 2; /* We fixed it... */ } else nfifo = ncr53c9x_rdfifo(sc, NCR_RDFIFO_START); if (nfifo != 2) { device_printf(sc->sc_dev, "RESELECT: %d bytes " "in FIFO! [intr %x, stat %x, step %d, " "prevphase %x]\n", nfifo, sc->sc_espintr, sc->sc_espstat, sc->sc_espstep, sc->sc_prevphase); goto reset; } sc->sc_selid = sc->sc_imess[0]; NCR_INTS(("selid=%02x ", sc->sc_selid)); /* Handle IDENTIFY message. */ ncr53c9x_msgin(sc); if (sc->sc_state != NCR_CONNECTED && sc->sc_state != NCR_IDENTIFIED) { /* IDENTIFY fail?! */ device_printf(sc->sc_dev, "identify failed, " "state %d, intr %02x\n", sc->sc_state, sc->sc_espintr); goto reset; } goto shortcut; /* i.e. next phase expected soon */ } #define NCRINTR_DONE (NCRINTR_FC | NCRINTR_BS) if ((sc->sc_espintr & NCRINTR_DONE) == NCRINTR_DONE) { /* * Arbitration won; examine the `step' register * to determine how far the selection could progress. */ if (ecb == NULL) { /* * When doing path inquiry during boot * FAS100A trigger a stray interrupt which * we just ignore instead of panicing. */ if (sc->sc_state == NCR_IDLE && sc->sc_espstep == 0) return; panic("%s: no nexus", __func__); } ti = &sc->sc_tinfo[ecb->ccb->ccb_h.target_id]; switch (sc->sc_espstep) { case 0: /* * The target did not respond with a * message out phase - probably an old * device that doesn't recognize ATN. * Clear ATN and just continue, the * target should be in the command * phase. * XXX check for command phase? */ NCRCMD(sc, NCRCMD_RSTATN); break; case 1: if (ti->curr.period == ti->goal.period && ti->curr.offset == ti->goal.offset && ti->curr.width == ti->goal.width && ecb->tag[0] == 0) { device_printf(sc->sc_dev, "step 1 " "and no negotiation to perform " "or tag to send\n"); goto reset; } if (sc->sc_phase != MESSAGE_OUT_PHASE) { device_printf(sc->sc_dev, "step 1 " "but not in MESSAGE_OUT_PHASE\n"); goto reset; } sc->sc_prevphase = MESSAGE_OUT_PHASE; /* XXX */ if (ecb->flags & ECB_RESET) { /* * A DEVICE RESET was scheduled and * ATNS used. As SEND_DEV_RESET has * the highest priority, the target * will reset and disconnect and we * will end up in ncr53c9x_done w/o * negotiating or sending a TAG. So * we just break here in order to * avoid warnings about negotiation * not having completed. */ ncr53c9x_sched_msgout(SEND_DEV_RESET); break; } if (ti->curr.width != ti->goal.width) { ti->flags |= T_WDTRSENT | T_SDTRSENT; ncr53c9x_sched_msgout(SEND_WDTR | SEND_SDTR); } if (ti->curr.period != ti->goal.period || ti->curr.offset != ti->goal.offset) { ti->flags |= T_SDTRSENT; ncr53c9x_sched_msgout(SEND_SDTR); } if (ecb->tag[0] != 0) /* Could not do ATN3 so send TAG. */ ncr53c9x_sched_msgout(SEND_TAG); 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 (sc->sc_features & NCR_F_DMASELECT) { if (sc->sc_cmdlen == 0) { /* Hope for the best... */ break; } } else if ((NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF) == 0) { /* Hope for the best... */ break; } xpt_print_path(ecb->ccb->ccb_h.path); printf("selection failed; %d left in FIFO " "[intr %x, stat %x, step %d]\n", NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF, sc->sc_espintr, sc->sc_espstat, sc->sc_espstep); NCRCMD(sc, NCRCMD_FLUSH); ncr53c9x_sched_msgout(SEND_ABORT); return; case 2: /* Select stuck at Command Phase. */ NCRCMD(sc, NCRCMD_FLUSH); break; case 4: if (sc->sc_features & NCR_F_DMASELECT && sc->sc_cmdlen != 0) { xpt_print_path(ecb->ccb->ccb_h.path); printf("select; %lu left in DMA buffer " "[intr %x, stat %x, step %d]\n", (u_long)sc->sc_cmdlen, sc->sc_espintr, sc->sc_espstat, sc->sc_espstep); } /* So far, everything went fine. */ break; } sc->sc_prevphase = INVALID_PHASE; /* ??? */ /* Do an implicit RESTORE POINTERS. */ sc->sc_dp = ecb->daddr; sc->sc_dleft = ecb->dleft; sc->sc_state = NCR_CONNECTED; break; } else { device_printf(sc->sc_dev, "unexpected status after " "select: [intr %x, stat %x, step %x]\n", sc->sc_espintr, sc->sc_espstat, sc->sc_espstep); NCRCMD(sc, NCRCMD_FLUSH); DELAY(1); goto reset; } if (sc->sc_state == NCR_IDLE) { device_printf(sc->sc_dev, "stray interrupt\n"); return; } break; case NCR_CONNECTED: if ((sc->sc_flags & NCR_ICCS) != 0) { /* "Initiate Command Complete Steps" in progress */ sc->sc_flags &= ~NCR_ICCS; if ((sc->sc_espintr & NCRINTR_DONE) == 0) { device_printf(sc->sc_dev, "ICCS: " ": [intr %x, stat %x, step %x]\n", sc->sc_espintr, sc->sc_espstat, sc->sc_espstep); } ncr53c9x_rdfifo(sc, NCR_RDFIFO_START); if (sc->sc_imlen < 2) device_printf(sc->sc_dev, "can't get status, " "only %d bytes\n", (int)sc->sc_imlen); ecb->stat = sc->sc_imess[sc->sc_imlen - 2]; msg = sc->sc_imess[sc->sc_imlen - 1]; NCR_PHASE(("", ecb->stat, msg)); if (msg == MSG_CMDCOMPLETE) { ecb->dleft = (ecb->flags & ECB_TENTATIVE_DONE) ? 0 : sc->sc_dleft; if ((ecb->flags & ECB_SENSE) == 0) ecb->ccb->csio.resid = ecb->dleft; sc->sc_state = NCR_CMDCOMPLETE; } else device_printf(sc->sc_dev, "STATUS_PHASE: " "msg %d\n", msg); sc->sc_imlen = 0; NCRCMD(sc, NCRCMD_MSGOK); goto shortcut; /* i.e. wait for disconnect */ } break; default: device_printf(sc->sc_dev, "invalid state: %d [intr %x, " "phase(c %x, p %x)]\n", sc->sc_state, sc->sc_espintr, sc->sc_phase, sc->sc_prevphase); goto reset; } /* * Driver is now in state NCR_CONNECTED, i.e. we * have a current command working the SCSI bus. */ if (sc->sc_state != NCR_CONNECTED || ecb == NULL) panic("%s: no nexus", __func__); switch (sc->sc_phase) { case MESSAGE_OUT_PHASE: NCR_PHASE(("MESSAGE_OUT_PHASE ")); ncr53c9x_msgout(sc); sc->sc_prevphase = MESSAGE_OUT_PHASE; break; case MESSAGE_IN_PHASE: msgin: NCR_PHASE(("MESSAGE_IN_PHASE ")); if ((sc->sc_espintr & NCRINTR_BS) != 0) { if ((sc->sc_rev != NCR_VARIANT_FAS366) || (sc->sc_espstat2 & NCRFAS_STAT2_EMPTY) == 0) { NCRCMD(sc, NCRCMD_FLUSH); } sc->sc_flags |= NCR_WAITI; NCRCMD(sc, NCRCMD_TRANS); } else if ((sc->sc_espintr & NCRINTR_FC) != 0) { if ((sc->sc_flags & NCR_WAITI) == 0) { device_printf(sc->sc_dev, "MSGIN: unexpected " "FC bit: [intr %x, stat %x, step %x]\n", sc->sc_espintr, sc->sc_espstat, sc->sc_espstep); } sc->sc_flags &= ~NCR_WAITI; ncr53c9x_rdfifo(sc, (sc->sc_prevphase == sc->sc_phase) ? NCR_RDFIFO_CONTINUE : NCR_RDFIFO_START); ncr53c9x_msgin(sc); } else device_printf(sc->sc_dev, "MSGIN: weird bits: " "[intr %x, stat %x, step %x]\n", sc->sc_espintr, sc->sc_espstat, sc->sc_espstep); sc->sc_prevphase = MESSAGE_IN_PHASE; goto shortcut; /* i.e. expect data to be ready */ case COMMAND_PHASE: /* * Send the command block. Normally we don't see this * phase because the SEL_ATN command takes care of * all this. However, we end up here if either the * target or we wanted to exchange some more messages * first (e.g. to start negotiations). */ NCR_PHASE(("COMMAND_PHASE 0x%02x (%d) ", ecb->cmd.cmd.opcode, ecb->clen)); if (NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF) { NCRCMD(sc, NCRCMD_FLUSH); #if 0 DELAY(1); #endif } /* * If we have more messages to send, e.g. WDTR or SDTR * after we've sent a TAG, set ATN so we'll go back to * MESSAGE_OUT_PHASE. */ if (sc->sc_msgpriq) { NCRCMD(sc, NCRCMD_SETATN); sc->sc_flags |= NCR_ATN; } if (sc->sc_features & NCR_F_DMASELECT) { /* Setup DMA transfer for command. */ size = ecb->clen; sc->sc_cmdlen = size; sc->sc_cmdp = (void *)&ecb->cmd.cmd; error = NCRDMA_SETUP(sc, &sc->sc_cmdp, &sc->sc_cmdlen, 0, &size); if (error != 0) goto cmd; /* Program the SCSI counter. */ NCR_SET_COUNT(sc, size); /* Load the count in. */ NCRCMD(sc, NCRCMD_NOP | NCRCMD_DMA); /* Start the command transfer. */ NCRCMD(sc, NCRCMD_TRANS | NCRCMD_DMA); NCRDMA_GO(sc); sc->sc_prevphase = COMMAND_PHASE; break; } cmd: sc->sc_cmdlen = 0; ncr53c9x_wrfifo(sc, (uint8_t *)&ecb->cmd.cmd, ecb->clen); NCRCMD(sc, NCRCMD_TRANS); sc->sc_prevphase = COMMAND_PHASE; break; case DATA_OUT_PHASE: NCR_PHASE(("DATA_OUT_PHASE [%ld] ", (long)sc->sc_dleft)); sc->sc_prevphase = DATA_OUT_PHASE; NCRCMD(sc, NCRCMD_FLUSH); size = ulmin(sc->sc_dleft, sc->sc_maxxfer); error = NCRDMA_SETUP(sc, &sc->sc_dp, &sc->sc_dleft, 0, &size); goto setup_xfer; case DATA_IN_PHASE: NCR_PHASE(("DATA_IN_PHASE ")); sc->sc_prevphase = DATA_IN_PHASE; if (sc->sc_rev == NCR_VARIANT_ESP100) NCRCMD(sc, NCRCMD_FLUSH); size = ulmin(sc->sc_dleft, sc->sc_maxxfer); error = NCRDMA_SETUP(sc, &sc->sc_dp, &sc->sc_dleft, 1, &size); setup_xfer: if (error != 0) { switch (error) { case EFBIG: ecb->ccb->ccb_h.status |= CAM_REQ_TOO_BIG; break; case EINPROGRESS: panic("%s: cannot deal with deferred DMA", __func__); case EINVAL: ecb->ccb->ccb_h.status |= CAM_REQ_INVALID; break; case ENOMEM: ecb->ccb->ccb_h.status |= CAM_REQUEUE_REQ; break; default: ecb->ccb->ccb_h.status |= CAM_REQ_CMP_ERR; } goto finish; } /* Target returned to data phase: wipe "done" memory. */ ecb->flags &= ~ECB_TENTATIVE_DONE; /* Program the SCSI counter. */ NCR_SET_COUNT(sc, size); /* Load the count in. */ NCRCMD(sc, NCRCMD_NOP | NCRCMD_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. */ NCRCMD(sc, (size == 0 ? NCRCMD_TRPAD : NCRCMD_TRANS) | NCRCMD_DMA); NCRDMA_GO(sc); return; case STATUS_PHASE: NCR_PHASE(("STATUS_PHASE ")); sc->sc_flags |= NCR_ICCS; NCRCMD(sc, NCRCMD_ICCS); sc->sc_prevphase = STATUS_PHASE; goto shortcut; /* i.e. expect status results soon */ case INVALID_PHASE: break; default: device_printf(sc->sc_dev, "unexpected bus phase; resetting\n"); goto reset; } return; reset: ncr53c9x_init(sc, 1); return; finish: ncr53c9x_done(sc, ecb); return; sched: sc->sc_state = NCR_IDLE; ncr53c9x_sched(sc); return; shortcut: /* * 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 a heuristic. It is 2 when at 20 MHz, 2 at 25 MHz and * 1 at 40 MHz. This needs testing. */ microtime(&wait); wait.tv_usec += 50 / sc->sc_freq; if (wait.tv_usec > 1000000) { wait.tv_sec++; wait.tv_usec -= 1000000; } do { if (NCRDMA_ISINTR(sc)) goto again; microtime(&cur); } while (cur.tv_sec <= wait.tv_sec && cur.tv_usec <= wait.tv_usec); } static void ncr53c9x_abort(struct ncr53c9x_softc *sc, struct ncr53c9x_ecb *ecb) { NCR_LOCK_ASSERT(sc, MA_OWNED); /* 2 secs for the abort */ ecb->timeout = NCR_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 == NCR_CONNECTED) ncr53c9x_sched_msgout(SEND_ABORT); /* * Reschedule callout. */ callout_reset(&ecb->ch, mstohz(ecb->timeout), ncr53c9x_callout, ecb); } else { /* * Just leave the command where it is. * XXX - what choice do we have but to reset the SCSI * eventually? */ if (sc->sc_state == NCR_IDLE) ncr53c9x_sched(sc); } } static void ncr53c9x_callout(void *arg) { struct ncr53c9x_ecb *ecb = arg; union ccb *ccb = ecb->ccb; struct ncr53c9x_softc *sc = ecb->sc; struct ncr53c9x_tinfo *ti; NCR_LOCK_ASSERT(sc, MA_OWNED); ti = &sc->sc_tinfo[ccb->ccb_h.target_id]; xpt_print_path(ccb->ccb_h.path); device_printf(sc->sc_dev, "timed out [ecb %p (flags 0x%x, dleft %x, " "stat %x)], ", ecb, ecb->flags, ecb->dleft, ecb->stat, sc->sc_state, sc->sc_nexus, NCR_READ_REG(sc, NCR_STAT), sc->sc_phase, sc->sc_prevphase, (long)sc->sc_dleft, sc->sc_msgpriq, sc->sc_msgout, NCRDMA_ISACTIVE(sc) ? "DMA active" : ""); #if defined(NCR53C9X_DEBUG) && NCR53C9X_DEBUG > 1 printf("TRACE: %s.", ecb->trace); #endif if (ecb->flags & ECB_ABORT) { /* Abort timed out. */ printf(" AGAIN\n"); ncr53c9x_init(sc, 1); } else { /* Abort the operation that has timed out. */ printf("\n"); ccb->ccb_h.status = CAM_CMD_TIMEOUT; ncr53c9x_abort(sc, ecb); /* Disable sync mode if stuck in a data phase. */ if (ecb == sc->sc_nexus && ti->curr.offset != 0 && (sc->sc_phase & (MSGI | CDI)) == 0) { /* XXX ASYNC CALLBACK! */ ti->goal.offset = 0; xpt_print_path(ccb->ccb_h.path); printf("sync negotiation disabled\n"); } } } static void ncr53c9x_watch(void *arg) { struct ncr53c9x_softc *sc = arg; struct ncr53c9x_linfo *li; struct ncr53c9x_tinfo *ti; time_t old; int t; NCR_LOCK_ASSERT(sc, MA_OWNED); /* Delete any structures that have not been used in 10min. */ old = time_second - (10 * 60); for (t = 0; t < sc->sc_ntarg; t++) { ti = &sc->sc_tinfo[t]; li = LIST_FIRST(&ti->luns); while (li) { if (li->last_used < old && li->untagged == NULL && li->used == 0) { if (li->lun < NCR_NLUN) ti->lun[li->lun] = NULL; LIST_REMOVE(li, link); free(li, M_DEVBUF); /* Restart the search at the beginning. */ li = LIST_FIRST(&ti->luns); continue; } li = LIST_NEXT(li, link); } } callout_reset(&sc->sc_watchdog, 60 * hz, ncr53c9x_watch, sc); }