/* $OpenBSD: siop.c,v 1.5 2001/03/06 16:29:32 krw Exp $ */ /* $NetBSD: siop.c,v 1.39 2001/02/11 18:04:49 bouyer Exp $ */ /* * Copyright (c) 2000 Manuel Bouyer. * * 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 Manuel Bouyer * 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. * */ /* SYM53c7/8xx PCI-SCSI I/O Processors driver */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef DEBUG #undef DEBUG #endif #undef SIOP_DEBUG #undef SIOP_DEBUG_DR #undef SIOP_DEBUG_INTR #undef SIOP_DEBUG_SCHED #undef DUMP_SCRIPT #define SIOP_STATS #ifndef SIOP_DEFAULT_TARGET #define SIOP_DEFAULT_TARGET 7 #endif /* number of cmd descriptors per block */ #define SIOP_NCMDPB (PAGE_SIZE / sizeof(struct siop_xfer)) /* number of scheduler slots (needs to match script) */ #define SIOP_NSLOTS 40 void siop_reset __P((struct siop_softc *)); void siop_handle_reset __P((struct siop_softc *)); int siop_handle_qtag_reject __P((struct siop_cmd *)); void siop_scsicmd_end __P((struct siop_cmd *)); void siop_start __P((struct siop_softc *)); void siop_timeout __P((void *)); int siop_scsicmd __P((struct scsi_xfer *)); void siop_dump_script __P((struct siop_softc *)); int siop_morecbd __P((struct siop_softc *)); struct siop_lunsw *siop_get_lunsw __P((struct siop_softc *)); void siop_add_reselsw __P((struct siop_softc *, int)); void siop_update_scntl3 __P((struct siop_softc *, struct siop_target *)); struct cfdriver siop_cd = { NULL, "siop", DV_DULL }; struct scsi_adapter siop_adapter = { siop_scsicmd, siop_minphys, NULL, NULL, }; struct scsi_device siop_dev = { NULL, NULL, NULL, NULL, }; #ifdef SIOP_STATS static int siop_stat_intr = 0; static int siop_stat_intr_shortxfer = 0; static int siop_stat_intr_sdp = 0; static int siop_stat_intr_done = 0; static int siop_stat_intr_xferdisc = 0; static int siop_stat_intr_lunresel = 0; static int siop_stat_intr_qfull = 0; void siop_printstats __P((void)); #define INCSTAT(x) x++ #else #define INCSTAT(x) #endif static __inline__ void siop_script_sync __P((struct siop_softc *, int)); static __inline__ void siop_script_sync(sc, ops) struct siop_softc *sc; int ops; { if ((sc->features & SF_CHIP_RAM) == 0) bus_dmamap_sync(sc->sc_dmat, sc->sc_scriptdma, ops); } static __inline__ u_int32_t siop_script_read __P((struct siop_softc *, u_int)); static __inline__ u_int32_t siop_script_read(sc, offset) struct siop_softc *sc; u_int offset; { if (sc->features & SF_CHIP_RAM) { return bus_space_read_4(sc->sc_ramt, sc->sc_ramh, offset * 4); } else { return letoh32(sc->sc_script[offset]); } } static __inline__ void siop_script_write __P((struct siop_softc *, u_int, u_int32_t)); static __inline__ void siop_script_write(sc, offset, val) struct siop_softc *sc; u_int offset; u_int32_t val; { if (sc->features & SF_CHIP_RAM) { bus_space_write_4(sc->sc_ramt, sc->sc_ramh, offset * 4, val); } else { sc->sc_script[offset] = htole32(val); } } void siop_attach(sc) struct siop_softc *sc; { int error, i; bus_dma_segment_t seg; int rseg; /* * Allocate DMA-safe memory for the script and map it. */ if ((sc->features & SF_CHIP_RAM) == 0) { error = bus_dmamem_alloc(sc->sc_dmat, PAGE_SIZE, PAGE_SIZE, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT); if (error) { printf("%s: unable to allocate script DMA memory, " "error = %d\n", sc->sc_dev.dv_xname, error); return; } error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, PAGE_SIZE, (caddr_t *)&sc->sc_script, BUS_DMA_NOWAIT|BUS_DMA_COHERENT); if (error) { printf("%s: unable to map script DMA memory, " "error = %d\n", sc->sc_dev.dv_xname, error); return; } error = bus_dmamap_create(sc->sc_dmat, PAGE_SIZE, 1, PAGE_SIZE, 0, BUS_DMA_NOWAIT, &sc->sc_scriptdma); if (error) { printf("%s: unable to create script DMA map, " "error = %d\n", sc->sc_dev.dv_xname, error); return; } error = bus_dmamap_load(sc->sc_dmat, sc->sc_scriptdma, sc->sc_script, PAGE_SIZE, NULL, BUS_DMA_NOWAIT); if (error) { printf("%s: unable to load script DMA map, " "error = %d\n", sc->sc_dev.dv_xname, error); return; } sc->sc_scriptaddr = sc->sc_scriptdma->dm_segs[0].ds_addr; sc->ram_size = PAGE_SIZE; } TAILQ_INIT(&sc->free_list); TAILQ_INIT(&sc->ready_list); TAILQ_INIT(&sc->urgent_list); TAILQ_INIT(&sc->cmds); TAILQ_INIT(&sc->lunsw_list); sc->sc_currschedslot = 0; #ifdef SIOP_DEBUG printf("%s: script size = %d, PHY addr=0x%x, VIRT=%p\n", sc->sc_dev.dv_xname, (int)sizeof(siop_script), (u_int32_t)sc->sc_scriptaddr, sc->sc_script); #endif sc->sc_link.adapter_softc = sc; sc->sc_link.openings = SIOP_OPENINGS; sc->sc_link.adapter_buswidth = (sc->features & SF_BUS_WIDE) ? 16 : 8; sc->sc_link.adapter_target = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SCID); if (sc->sc_link.adapter_target == 0 || sc->sc_link.adapter_target >= sc->sc_link.adapter_buswidth) sc->sc_link.adapter_target = SIOP_DEFAULT_TARGET; sc->sc_link.adapter = &siop_adapter; sc->sc_link.device = &siop_dev; sc->sc_link.flags = 0; for (i = 0; i < 16; i++) sc->targets[i] = NULL; /* find min/max sync period for this chip */ sc->maxsync = 0; sc->minsync = 255; for (i = 0; i < sizeof(scf_period) / sizeof(scf_period[0]); i++) { if (sc->clock_period != scf_period[i].clock) continue; if (sc->maxsync < scf_period[i].period) sc->maxsync = scf_period[i].period; if (sc->minsync > scf_period[i].period) sc->minsync = scf_period[i].period; } if (sc->maxsync == 255 || sc->minsync == 0) panic("siop: can't find my sync parameters\n"); /* Do a bus reset, so that devices fall back to narrow/async */ siop_resetbus(sc); /* * siop_reset() will reset the chip, thus clearing pending interrupts */ siop_reset(sc); #ifdef DUMP_SCRIPT siop_dump_script(sc); #endif config_found((struct device*)sc, &sc->sc_link, scsiprint); } void siop_reset(sc) struct siop_softc *sc; { int i, j; struct siop_lunsw *lunsw; siop_common_reset(sc); /* copy and patch the script */ if (sc->features & SF_CHIP_RAM) { bus_space_write_region_4(sc->sc_ramt, sc->sc_ramh, 0, siop_script, sizeof(siop_script) / sizeof(siop_script[0])); for (j = 0; j < (sizeof(E_abs_msgin_Used) / sizeof(E_abs_msgin_Used[0])); j++) { bus_space_write_4(sc->sc_ramt, sc->sc_ramh, E_abs_msgin_Used[j] * 4, sc->sc_scriptaddr + Ent_msgin_space); } } else { for (j = 0; j < (sizeof(siop_script) / sizeof(siop_script[0])); j++) { sc->sc_script[j] = htole32(siop_script[j]); } for (j = 0; j < (sizeof(E_abs_msgin_Used) / sizeof(E_abs_msgin_Used[0])); j++) { sc->sc_script[E_abs_msgin_Used[j]] = htole32(sc->sc_scriptaddr + Ent_msgin_space); } } sc->script_free_lo = sizeof(siop_script) / sizeof(siop_script[0]); sc->script_free_hi = sc->ram_size / 4; /* free used and unused lun switches */ while((lunsw = TAILQ_FIRST(&sc->lunsw_list)) != NULL) { #ifdef SIOP_DEBUG printf("%s: free lunsw at offset %d\n", sc->sc_dev.dv_xname, lunsw->lunsw_off); #endif TAILQ_REMOVE(&sc->lunsw_list, lunsw, next); free(lunsw, M_DEVBUF); } TAILQ_INIT(&sc->lunsw_list); /* restore reselect switch */ for (i = 0; i < sc->sc_link.adapter_buswidth; i++) { if (sc->targets[i] == NULL) continue; #ifdef SIOP_DEBUG printf("%s: restore sw for target %d\n", sc->sc_dev.dv_xname, i); #endif free(sc->targets[i]->lunsw, M_DEVBUF); sc->targets[i]->lunsw = siop_get_lunsw(sc); if (sc->targets[i]->lunsw == NULL) { printf("%s: can't alloc lunsw for target %d\n", sc->sc_dev.dv_xname, i); break; } siop_add_reselsw(sc, i); } /* start script */ if ((sc->features & SF_CHIP_RAM) == 0) { bus_dmamap_sync(sc->sc_dmat, sc->sc_scriptdma, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); } bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP, sc->sc_scriptaddr + Ent_reselect); } #if 0 #define CALL_SCRIPT(ent) do {\ printf ("start script DSA 0x%lx DSP 0x%lx\n", \ siop_cmd->dsa, \ sc->sc_scriptaddr + ent); \ bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP, sc->sc_scriptaddr + ent); \ } while (0) #else #define CALL_SCRIPT(ent) do {\ bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP, sc->sc_scriptaddr + ent); \ } while (0) #endif int siop_intr(v) void *v; { struct siop_softc *sc = v; struct siop_target *siop_target; struct siop_cmd *siop_cmd; struct siop_lun *siop_lun; struct scsi_xfer *xs; int istat, sist, sstat1, dstat; u_int32_t irqcode; int need_reset = 0; int offset, target, lun, tag; bus_addr_t dsa; struct siop_cbd *cbdp; int freetarget = 0; int restart = 0; istat = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_ISTAT); if ((istat & (ISTAT_INTF | ISTAT_DIP | ISTAT_SIP)) == 0) return 0; INCSTAT(siop_stat_intr); if (istat & ISTAT_INTF) { printf("INTRF\n"); bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_ISTAT, ISTAT_INTF); } /* use DSA to find the current siop_cmd */ dsa = bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA); for (cbdp = TAILQ_FIRST(&sc->cmds); cbdp != NULL; cbdp = TAILQ_NEXT(cbdp, next)) { if (dsa >= cbdp->xferdma->dm_segs[0].ds_addr && dsa < cbdp->xferdma->dm_segs[0].ds_addr + PAGE_SIZE) { dsa -= cbdp->xferdma->dm_segs[0].ds_addr; siop_cmd = &cbdp->cmds[dsa / sizeof(struct siop_xfer)]; siop_table_sync(siop_cmd, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); break; } } if (cbdp == NULL) { siop_cmd = NULL; } if (siop_cmd) { xs = siop_cmd->xs; siop_target = siop_cmd->siop_target; target = siop_cmd->xs->sc_link->target; lun = siop_cmd->xs->sc_link->lun; tag = siop_cmd->tag; siop_lun = siop_target->siop_lun[lun]; #ifdef DIAGNOSTIC if (siop_cmd->status != CMDST_ACTIVE && siop_cmd->status != CMDST_SENSE_ACTIVE) { printf("siop_cmd (lun %d) not active (%d)\n", lun, siop_cmd->status); xs = NULL; siop_target = NULL; target = -1; lun = -1; tag = -1; siop_lun = NULL; siop_cmd = NULL; } else if (siop_lun->siop_tag[tag].active != siop_cmd) { printf("siop_cmd (lun %d tag %d) not in siop_lun " "active (%p != %p)\n", lun, tag, siop_cmd, siop_lun->siop_tag[tag].active); } #endif } else { xs = NULL; siop_target = NULL; target = -1; lun = -1; tag = -1; siop_lun = NULL; } if (istat & ISTAT_DIP) { dstat = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_DSTAT); if (dstat & DSTAT_SSI) { printf("single step dsp 0x%08x dsa 0x08%x\n", (int)(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) - sc->sc_scriptaddr), bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA)); if ((dstat & ~(DSTAT_DFE | DSTAT_SSI)) == 0 && (istat & ISTAT_SIP) == 0) { bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_DCNTL, bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_DCNTL) | DCNTL_STD); } return 1; } if (dstat & ~(DSTAT_SIR | DSTAT_DFE | DSTAT_SSI)) { printf("DMA IRQ:"); if (dstat & DSTAT_IID) printf("Illegal instruction"); if (dstat & DSTAT_ABRT) printf(" abort"); if (dstat & DSTAT_BF) printf(" bus fault"); if (dstat & DSTAT_MDPE) printf(" parity"); if (dstat & DSTAT_DFE) printf(" dma fifo empty"); printf(", DSP=0x%x DSA=0x%x: ", (int)(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) - sc->sc_scriptaddr), bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA)); if (siop_cmd) printf("last msg_in=0x%x status=0x%x\n", siop_cmd->siop_tables.msg_in[0], letoh32(siop_cmd->siop_tables.status)); else printf("%s: current DSA invalid\n", sc->sc_dev.dv_xname); need_reset = 1; } } if (istat & ISTAT_SIP) { if (istat & ISTAT_DIP) delay(10); /* * Can't read sist0 & sist1 independantly, or we have to * insert delay */ sist = bus_space_read_2(sc->sc_rt, sc->sc_rh, SIOP_SIST0); sstat1 = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SSTAT1); #ifdef SIOP_DEBUG_INTR printf("scsi interrupt, sist=0x%x sstat1=0x%x " "DSA=0x%x DSP=0x%lx\n", sist, bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SSTAT1), bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA), (u_long)(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) - sc->sc_scriptaddr)); #endif if (sist & SIST0_RST) { siop_handle_reset(sc); siop_start(sc); /* no table to flush here */ return 1; } if (sist & SIST0_SGE) { if (siop_cmd) sc_print_addr(xs->sc_link); else printf("%s:", sc->sc_dev.dv_xname); printf("scsi gross error\n"); goto reset; } if ((sist & SIST0_MA) && need_reset == 0) { if (siop_cmd) { int scratcha0; dstat = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_DSTAT); /* * first restore DSA, in case we were in a S/G * operation. */ bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSA, siop_cmd->dsa); scratcha0 = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SCRATCHA); switch (sstat1 & SSTAT1_PHASE_MASK) { case SSTAT1_PHASE_STATUS: /* * Previous phase may have aborted for any reason * (for example, the target has less data to * transfer than requested). Just go to status * and the command should terminate. */ INCSTAT(siop_stat_intr_shortxfer); if ((dstat & DSTAT_DFE) == 0) siop_clearfifo(sc); /* no table to flush here */ CALL_SCRIPT(Ent_status); return 1; case SSTAT1_PHASE_MSGIN: /* * Target may be ready to disconnect. * Save data pointers just in case. */ INCSTAT(siop_stat_intr_xferdisc); if (scratcha0 & A_flag_data) siop_sdp(siop_cmd); else if ((dstat & DSTAT_DFE) == 0) siop_clearfifo(sc); bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_SCRATCHA, scratcha0 & ~A_flag_data); siop_table_sync(siop_cmd, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); CALL_SCRIPT(Ent_msgin); return 1; } printf("%s: unexpected phase mismatch %d\n", sc->sc_dev.dv_xname, sstat1 & SSTAT1_PHASE_MASK); } else { printf("%s: phase mismatch without command\n", sc->sc_dev.dv_xname); } need_reset = 1; } if (sist & SIST0_PAR) { /* parity error, reset */ if (siop_cmd) sc_print_addr(xs->sc_link); else printf("%s:", sc->sc_dev.dv_xname); printf("parity error\n"); goto reset; } if ((sist & (SIST1_STO << 8)) && need_reset == 0) { /* selection time out, assume there's no device here */ if (siop_cmd) { siop_cmd->status = CMDST_DONE; xs->error = XS_SELTIMEOUT; freetarget = 1; goto end; } else { printf("%s: selection timeout without " "command\n", sc->sc_dev.dv_xname); need_reset = 1; } } if (sist & SIST0_UDC) { /* * unexpected disconnect. Usually the target signals * a fatal condition this way. Attempt to get sense. */ if (siop_cmd) { siop_cmd->siop_tables.status = htole32(SCSI_CHECK); goto end; } printf("%s: unexpected disconnect without " "command\n", sc->sc_dev.dv_xname); goto reset; } if (sist & (SIST1_SBMC << 8)) { /* SCSI bus mode change */ if (siop_modechange(sc) == 0 || need_reset == 1) goto reset; if ((istat & ISTAT_DIP) && (dstat & DSTAT_SIR)) { /* * We have a script interrupt. It will * restart the script. */ goto scintr; } /* * Else we have to restart the script ourself, at the * interrupted instruction. */ bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP, bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) - 8); return 1; } /* Else it's an unhandled exeption (for now). */ printf("%s: unhandled scsi interrupt, sist=0x%x sstat1=0x%x " "DSA=0x%x DSP=0x%x\n", sc->sc_dev.dv_xname, sist, bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SSTAT1), bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA), (int)(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) - sc->sc_scriptaddr)); if (siop_cmd) { siop_cmd->status = CMDST_DONE; xs->error = XS_SELTIMEOUT; goto end; } need_reset = 1; } if (need_reset) { reset: /* fatal error, reset the bus */ siop_resetbus(sc); /* no table to flush here */ return 1; } scintr: if ((istat & ISTAT_DIP) && (dstat & DSTAT_SIR)) { /* script interrupt */ irqcode = bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSPS); #ifdef SIOP_DEBUG_INTR printf("script interrupt 0x%x\n", irqcode); #endif /* * no command, or an inactive command is only valid for a * reselect interrupt */ if ((irqcode & 0x80) == 0) { if (siop_cmd == NULL) { printf("%s: script interrupt (0x%x) with invalid DSA !!!\n", sc->sc_dev.dv_xname, irqcode); goto reset; } if (siop_cmd->status != CMDST_ACTIVE && siop_cmd->status != CMDST_SENSE_ACTIVE) { printf("%s: command with invalid status " "(IRQ code 0x%x current status %d) !\n", sc->sc_dev.dv_xname, irqcode, siop_cmd->status); xs = NULL; } } switch(irqcode) { case A_int_err: printf("error, DSP=0x%x\n", (int)(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) - sc->sc_scriptaddr)); if (xs) { xs->error = XS_SELTIMEOUT; goto end; } else { goto reset; } case A_int_reseltarg: printf("%s: reselect with invalid target\n", sc->sc_dev.dv_xname); goto reset; case A_int_resellun: INCSTAT(siop_stat_intr_lunresel); target = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SCRATCHA) & 0xf; lun = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SCRATCHA + 1); tag = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SCRATCHA + 2); siop_target = sc->targets[target]; if (siop_target == NULL) { printf("%s: reselect with invalid " "target %d\n", sc->sc_dev.dv_xname, target); goto reset; } siop_lun = siop_target->siop_lun[lun]; if (siop_lun == NULL) { printf("%s: target %d reselect with invalid " "lun %d\n", sc->sc_dev.dv_xname, target, lun); goto reset; } if (siop_lun->siop_tag[tag].active == NULL) { printf("%s: target %d lun %d tag %d reselect " "without command\n", sc->sc_dev.dv_xname, target, lun, tag); goto reset; } siop_cmd = siop_lun->siop_tag[tag].active; bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP, siop_cmd->dsa + sizeof(struct siop_xfer_common) + Ent_ldsa_reload_dsa); siop_table_sync(siop_cmd, BUS_DMASYNC_PREWRITE); return 1; case A_int_reseltag: printf("%s: reselect with invalid tag\n", sc->sc_dev.dv_xname); goto reset; case A_int_msgin: { int msgin = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SFBR); if (msgin == MSG_MESSAGE_REJECT) { int msg, extmsg; if (siop_cmd->siop_tables.msg_out[0] & 0x80) { /* * Message was part of an identify + * something else. Identify shouldn't * have been rejected. */ msg = siop_cmd->siop_tables.msg_out[1]; extmsg = siop_cmd->siop_tables.msg_out[3]; } else { msg = siop_cmd->siop_tables.msg_out[0]; extmsg = siop_cmd->siop_tables.msg_out[2]; } if (msg == MSG_MESSAGE_REJECT) { /* MSG_REJECT for a MSG_REJECT! */ if (xs) sc_print_addr(xs->sc_link); else printf("%s: ", sc->sc_dev.dv_xname); printf("our reject message was " "rejected\n"); goto reset; } if (msg == MSG_EXTENDED && extmsg == MSG_EXT_WDTR) { if ((siop_target->flags & TARF_SYNC) == 0) { siop_target->status = TARST_OK; siop_print_info(sc, target); /* no table to flush here */ CALL_SCRIPT(Ent_msgin_ack); return 1; } siop_target->status = TARST_SYNC_NEG; siop_sdtr_msg(siop_cmd, 0, sc->minsync, sc->maxoff); siop_table_sync(siop_cmd, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); CALL_SCRIPT(Ent_send_msgout); return 1; } else if (msg == MSG_EXTENDED && extmsg == MSG_EXT_SDTR) { siop_target->status = TARST_OK; siop_print_info(sc, target); /* no table to flush here */ CALL_SCRIPT(Ent_msgin_ack); return 1; } else if (msg == MSG_SIMPLE_Q_TAG || msg == MSG_HEAD_OF_Q_TAG || msg == MSG_ORDERED_Q_TAG) { if (siop_handle_qtag_reject( siop_cmd) == -1) goto reset; CALL_SCRIPT(Ent_msgin_ack); return 1; } if (xs) sc_print_addr(xs->sc_link); else printf("%s: ", sc->sc_dev.dv_xname); if (msg == MSG_EXTENDED) { printf("scsi message reject, extended " "message sent was 0x%x\n", extmsg); } else { printf("scsi message reject, message " "sent was 0x%x\n", msg); } /* no table to flush here */ CALL_SCRIPT(Ent_msgin_ack); return 1; } if (xs) sc_print_addr(xs->sc_link); else printf("%s: ", sc->sc_dev.dv_xname); printf("unhandled message 0x%x\n", siop_cmd->siop_tables.msg_in[0]); siop_cmd->siop_tables.msg_out[0] = MSG_MESSAGE_REJECT; siop_cmd->siop_tables.t_msgout.count= htole32(1); siop_table_sync(siop_cmd, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); CALL_SCRIPT(Ent_send_msgout); return 1; } case A_int_extmsgin: #ifdef SIOP_DEBUG_INTR printf("extended message: msg 0x%x len %d\n", siop_cmd->siop_tables.msg_in[2], siop_cmd->siop_tables.msg_in[1]); #endif if (siop_cmd->siop_tables.msg_in[1] > 6) printf("%s: extended message too big (%d)\n", sc->sc_dev.dv_xname, siop_cmd->siop_tables.msg_in[1]); siop_cmd->siop_tables.t_extmsgdata.count = htole32(siop_cmd->siop_tables.msg_in[1] - 1); siop_table_sync(siop_cmd, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); CALL_SCRIPT(Ent_get_extmsgdata); return 1; case A_int_extmsgdata: #ifdef SIOP_DEBUG_INTR { int i; printf("extended message: 0x%x, data:", siop_cmd->siop_tables.msg_in[2]); for (i = 3; i < 2 + siop_cmd->siop_tables.msg_in[1]; i++) printf(" 0x%x", siop_cmd->siop_tables.msg_in[i]); printf("\n"); } #endif if (siop_cmd->siop_tables.msg_in[2] == MSG_EXT_WDTR) { switch (siop_wdtr_neg(siop_cmd)) { case SIOP_NEG_MSGOUT: siop_update_scntl3(sc, siop_cmd->siop_target); siop_table_sync(siop_cmd, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); CALL_SCRIPT(Ent_send_msgout); return(1); case SIOP_NEG_ACK: siop_update_scntl3(sc, siop_cmd->siop_target); CALL_SCRIPT(Ent_msgin_ack); return(1); default: panic("invalid retval from " "siop_wdtr_neg()"); } return(1); } if (siop_cmd->siop_tables.msg_in[2] == MSG_EXT_SDTR) { switch (siop_sdtr_neg(siop_cmd)) { case SIOP_NEG_MSGOUT: siop_update_scntl3(sc, siop_cmd->siop_target); siop_table_sync(siop_cmd, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); CALL_SCRIPT(Ent_send_msgout); return(1); case SIOP_NEG_ACK: siop_update_scntl3(sc, siop_cmd->siop_target); CALL_SCRIPT(Ent_msgin_ack); return(1); default: panic("invalid retval from " "siop_wdtr_neg()"); } return(1); } /* send a message reject */ siop_cmd->siop_tables.msg_out[0] = MSG_MESSAGE_REJECT; siop_cmd->siop_tables.t_msgout.count = htole32(1); siop_table_sync(siop_cmd, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); CALL_SCRIPT(Ent_send_msgout); return 1; case A_int_disc: INCSTAT(siop_stat_intr_sdp); offset = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SCRATCHA + 1); #ifdef SIOP_DEBUG_DR printf("disconnect offset %d\n", offset); #endif if (offset > SIOP_NSG) { printf("%s: bad offset for disconnect (%d)\n", sc->sc_dev.dv_xname, offset); goto reset; } /* * offset == SIOP_NSG may be a valid condition if * we get a sdp when the xfer is done. * Don't call memmove in this case. */ if (offset < SIOP_NSG) { bcopy(&siop_cmd->siop_tables.data[offset], &siop_cmd->siop_tables.data[0], (SIOP_NSG - offset) * sizeof(scr_table_t)); siop_table_sync(siop_cmd, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); } CALL_SCRIPT(Ent_script_sched); /* check if we can put some command in scheduler */ siop_start(sc); return 1; case A_int_resfail: printf("reselect failed\n"); CALL_SCRIPT(Ent_script_sched); return 1; case A_int_done: if (xs == NULL) { printf("%s: done without command, DSA=0x%lx\n", sc->sc_dev.dv_xname, (u_long)siop_cmd->dsa); siop_cmd->status = CMDST_FREE; siop_start(sc); CALL_SCRIPT(Ent_script_sched); return 1; } #ifdef SIOP_DEBUG_INTR printf("done, DSA=0x%lx target id 0x%x last msg " "in=0x%x status=0x%x\n", (u_long)siop_cmd->dsa, letoh32(siop_cmd->siop_tables.id), siop_cmd->siop_tables.msg_in[0], letoh32(siop_cmd->siop_tables.status)); #endif INCSTAT(siop_stat_intr_done); if (siop_cmd->status == CMDST_SENSE_ACTIVE) siop_cmd->status = CMDST_SENSE_DONE; else siop_cmd->status = CMDST_DONE; goto end; default: printf("unknown irqcode %x\n", irqcode); if (xs) { xs->error = XS_SELTIMEOUT; goto end; } goto reset; } return 1; } /* We just shouldn't get here */ printf("istat = 0x%x, dstat = 0x%x, sist = 0x%x, sstat1 = 0x%x\n", istat, dstat, sist, sstat1); printf("need_reset = %d, irqcode = %d, siop_cmd = %p, siop_target = %p, xs = %p\n"); if (siop_cmd != NULL) printf("siop_cmd->status = %d\n", siop_cmd->status); panic("%s: siop_intr: I shouldn't be here!", sc->sc_dev.dv_xname); return 1; end: /* * Restart the script now if command completed properly. * Otherwise wait for siop_scsicmd_end(), it may need to put * a cmd at the front of the queue. */ if (letoh32(siop_cmd->siop_tables.status) == SCSI_OK && TAILQ_FIRST(&sc->urgent_list) != NULL) CALL_SCRIPT(Ent_script_sched); else restart = 1; siop_scsicmd_end(siop_cmd); siop_lun->siop_tag[tag].active = NULL; if (siop_cmd->status == CMDST_FREE) { TAILQ_INSERT_TAIL(&sc->free_list, siop_cmd, next); siop_lun->lun_flags &= ~SIOP_LUNF_FULL; if (freetarget && siop_target->status == TARST_PROBING) siop_del_dev(sc, target, lun); } siop_start(sc); if (restart) CALL_SCRIPT(Ent_script_sched); return 1; } void siop_scsicmd_end(siop_cmd) struct siop_cmd *siop_cmd; { struct scsi_xfer *xs = siop_cmd->xs; struct siop_softc *sc = siop_cmd->siop_sc; switch(letoh32(siop_cmd->siop_tables.status)) { case SCSI_OK: xs->error = (siop_cmd->status == CMDST_DONE) ? XS_NOERROR : XS_SENSE; break; case SCSI_BUSY: xs->error = XS_BUSY; break; case SCSI_CHECK: if (siop_cmd->status == CMDST_SENSE_DONE) { /* request sense on a request sense ? */ printf("request sense failed\n"); xs->error = XS_DRIVER_STUFFUP; } else { siop_cmd->status = CMDST_SENSE; } break; case SCSI_QUEUE_FULL: { struct siop_lun *siop_lun = siop_cmd->siop_target->siop_lun[ xs->sc_link->lun]; /* * Device didn't queue the command. We have to retry * it. We insert it into the urgent list, hoping to * preserve order. But unfortunately, commands already * in the scheduler may be accepted before this one. * Also remember the condition, to avoid starting new * commands for this device before one is done. */ INCSTAT(siop_stat_intr_qfull); #ifdef SIOP_DEBUG printf("%s:%d:%d: queue full (tag %d)\n", sc->sc_dev.dv_xname, xs->sc_link->target, xs->sc_link->lun, siop_cmd->tag); #endif timeout_del(&xs->stimeout); siop_lun->lun_flags |= SIOP_LUNF_FULL; siop_cmd->status = CMDST_READY; siop_setuptables(siop_cmd); TAILQ_INSERT_TAIL(&sc->urgent_list, siop_cmd, next); return; } case SCSI_SIOP_NOCHECK: /* * don't check status, xs->error is already valid */ break; case SCSI_SIOP_NOSTATUS: /* * the status byte was not updated, cmd was * aborted */ xs->error = XS_SELTIMEOUT; break; default: xs->error = XS_DRIVER_STUFFUP; } if (siop_cmd->status != CMDST_SENSE_DONE && xs->flags & (SCSI_DATA_IN | SCSI_DATA_OUT)) { bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_data, (xs->flags & SCSI_DATA_IN) ? BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE); bus_dmamap_unload(sc->sc_dmat, siop_cmd->dmamap_data); } bus_dmamap_unload(sc->sc_dmat, siop_cmd->dmamap_cmd); if (siop_cmd->status == CMDST_SENSE) { /* issue a request sense for this target */ int error; siop_cmd->rs_cmd.opcode = REQUEST_SENSE; siop_cmd->rs_cmd.byte2 = xs->sc_link->lun << 5; siop_cmd->rs_cmd.unused[0] = siop_cmd->rs_cmd.unused[1] = 0; siop_cmd->rs_cmd.length = sizeof(struct scsi_sense_data); siop_cmd->rs_cmd.control = 0; siop_cmd->flags &= ~CMDFL_TAG; error = bus_dmamap_load(sc->sc_dmat, siop_cmd->dmamap_cmd, &siop_cmd->rs_cmd, sizeof(struct scsi_sense), NULL, BUS_DMA_NOWAIT); if (error) { printf("%s: unable to load cmd DMA map " "(for SENSE): %d\n", sc->sc_dev.dv_xname, error); xs->error = XS_DRIVER_STUFFUP; goto out; } error = bus_dmamap_load(sc->sc_dmat, siop_cmd->dmamap_data, &xs->sense, sizeof(struct scsi_sense_data), NULL, BUS_DMA_NOWAIT); if (error) { printf("%s: unable to load data DMA map " "(for SENSE): %d\n", sc->sc_dev.dv_xname, error); xs->error = XS_DRIVER_STUFFUP; bus_dmamap_unload(sc->sc_dmat, siop_cmd->dmamap_cmd); goto out; } bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_data, BUS_DMASYNC_PREREAD); bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_cmd, BUS_DMASYNC_PREWRITE); siop_setuptables(siop_cmd); /* arrange for the cmd to be handled now */ TAILQ_INSERT_HEAD(&sc->urgent_list, siop_cmd, next); return; } else if (siop_cmd->status == CMDST_SENSE_DONE) { bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_data, BUS_DMASYNC_POSTREAD); bus_dmamap_unload(sc->sc_dmat, siop_cmd->dmamap_data); } out: timeout_del(&siop_cmd->xs->stimeout); siop_cmd->status = CMDST_FREE; xs->flags |= ITSDONE; xs->resid = 0; scsi_done(xs); } /* * handle a rejected queue tag message: the command will run untagged, * has to adjust the reselect script. */ int siop_handle_qtag_reject(siop_cmd) struct siop_cmd *siop_cmd; { struct siop_softc *sc = siop_cmd->siop_sc; int target = siop_cmd->xs->sc_link->target; int lun = siop_cmd->xs->sc_link->lun; int tag = siop_cmd->siop_tables.msg_out[2]; struct siop_lun *siop_lun = sc->targets[target]->siop_lun[lun]; #ifdef SIOP_DEBUG printf("%s:%d:%d: tag message %d (%d) rejected (status %d)\n", sc->sc_dev.dv_xname, target, lun, tag, siop_cmd->tag, siop_cmd->status); #endif if (siop_lun->siop_tag[0].active != NULL) { printf("%s: untagged command already running for target %d " "lun %d (status %d)\n", sc->sc_dev.dv_xname, target, lun, siop_lun->siop_tag[0].active->status); return -1; } /* clear tag slot */ siop_lun->siop_tag[tag].active = NULL; /* add command to non-tagged slot */ siop_lun->siop_tag[0].active = siop_cmd; siop_cmd->tag = 0; /* adjust reselect script if there is one */ if (siop_lun->siop_tag[0].reseloff > 0) { siop_script_write(sc, siop_lun->siop_tag[0].reseloff + 1, siop_cmd->dsa + sizeof(struct siop_xfer_common) + Ent_ldsa_reload_dsa); siop_table_sync(siop_cmd, BUS_DMASYNC_PREWRITE); } return 0; } /* * Handle a bus reset: reset chip, unqueue all active commands, free all * target structs and report losage to upper layer. * As the upper layer may requeue immediately we have to first store * all active commands in a temporary queue. */ void siop_handle_reset(sc) struct siop_softc *sc; { struct cmd_list reset_list; struct siop_cmd *siop_cmd, *next_siop_cmd; struct siop_lun *siop_lun; int target, lun, tag; /* * SCSI bus reset. Reset the chip and restart * the queue. Need to clean up all active commands. */ printf("%s: scsi bus reset\n", sc->sc_dev.dv_xname); /* stop, reset and restart the chip */ siop_reset(sc); TAILQ_INIT(&reset_list); /* * Process all commands: first commmands being executed */ for (target = 0; target < sc->sc_link.adapter_buswidth; target++) { if (sc->targets[target] == NULL) continue; for (lun = 0; lun < 8; lun++) { siop_lun = sc->targets[target]->siop_lun[lun]; if (siop_lun == NULL) continue; siop_lun->lun_flags &= ~SIOP_LUNF_FULL; for (tag = 0; tag < ((sc->targets[target]->flags & TARF_TAG) ? SIOP_NTAG : 1); tag++) { siop_cmd = siop_lun->siop_tag[tag].active; if (siop_cmd == NULL) continue; printf("cmd %p (target %d:%d) in reset list\n", siop_cmd, target, lun); TAILQ_INSERT_TAIL(&reset_list, siop_cmd, next); siop_lun->siop_tag[tag].active = NULL; } } sc->targets[target]->status = TARST_ASYNC; sc->targets[target]->flags &= ~TARF_ISWIDE; } /* Next commands from the urgent list */ for (siop_cmd = TAILQ_FIRST(&sc->urgent_list); siop_cmd != NULL; siop_cmd = next_siop_cmd) { next_siop_cmd = TAILQ_NEXT(siop_cmd, next); siop_cmd->flags &= ~CMDFL_TAG; printf("cmd %p (target %d:%d) in reset list (wait)\n", siop_cmd, siop_cmd->xs->sc_link->target, siop_cmd->xs->sc_link->lun); TAILQ_REMOVE(&sc->urgent_list, siop_cmd, next); TAILQ_INSERT_TAIL(&reset_list, siop_cmd, next); } /* Then command waiting in the input list */ for (siop_cmd = TAILQ_FIRST(&sc->ready_list); siop_cmd != NULL; siop_cmd = next_siop_cmd) { next_siop_cmd = TAILQ_NEXT(siop_cmd, next); siop_cmd->flags &= ~CMDFL_TAG; printf("cmd %p (target %d:%d) in reset list (wait)\n", siop_cmd, siop_cmd->xs->sc_link->target, siop_cmd->xs->sc_link->lun); TAILQ_REMOVE(&sc->ready_list, siop_cmd, next); TAILQ_INSERT_TAIL(&reset_list, siop_cmd, next); } for (siop_cmd = TAILQ_FIRST(&reset_list); siop_cmd != NULL; siop_cmd = next_siop_cmd) { next_siop_cmd = TAILQ_NEXT(siop_cmd, next); siop_cmd->xs->error = (siop_cmd->flags & CMDFL_TIMEOUT) ? XS_TIMEOUT : XS_RESET; siop_cmd->siop_tables.status = htole32(SCSI_SIOP_NOCHECK); printf("cmd %p (status %d) about to be processed\n", siop_cmd, siop_cmd->status); if (siop_cmd->status == CMDST_SENSE || siop_cmd->status == CMDST_SENSE_ACTIVE) siop_cmd->status = CMDST_SENSE_DONE; else siop_cmd->status = CMDST_DONE; TAILQ_REMOVE(&reset_list, siop_cmd, next); siop_scsicmd_end(siop_cmd); TAILQ_INSERT_TAIL(&sc->free_list, siop_cmd, next); } } int siop_scsicmd(xs) struct scsi_xfer *xs; { struct scsi_inquiry_data *inqdata; struct siop_softc *sc = (struct siop_softc *)xs->sc_link->adapter_softc; struct siop_cmd *siop_cmd; int s, error, i; const int target = xs->sc_link->target; const int lun = xs->sc_link->lun; s = splbio(); #ifdef SIOP_DEBUG_SCHED printf("starting cmd 0x%02x for %d:%d\n", xs->cmd->opcode, target, lun); #endif siop_cmd = TAILQ_FIRST(&sc->free_list); if (siop_cmd) { TAILQ_REMOVE(&sc->free_list, siop_cmd, next); } else { if (siop_morecbd(sc) == 0) { siop_cmd = TAILQ_FIRST(&sc->free_list); #ifdef DIAGNOSTIC if (siop_cmd == NULL) panic("siop_morecbd succeed and does nothing"); #endif TAILQ_REMOVE(&sc->free_list, siop_cmd, next); } } if (siop_cmd == NULL) { xs->error = XS_DRIVER_STUFFUP; splx(s); return(TRY_AGAIN_LATER); } /* Always reset xs->stimeout, lest we timeout_del() with trash */ timeout_set(&xs->stimeout, siop_timeout, siop_cmd); #ifdef DIAGNOSTIC if (siop_cmd->status != CMDST_FREE) panic("siop_scsicmd: new cmd not free"); #endif if (sc->targets[target] == NULL) { #ifdef SIOP_DEBUG printf("%s: alloc siop_target for target %d\n", sc->sc_dev.dv_xname, target); #endif sc->targets[target] = malloc(sizeof(struct siop_target), M_DEVBUF, M_NOWAIT); if (sc->targets[target] == NULL) { printf("%s: can't malloc memory for target %d\n", sc->sc_dev.dv_xname, target); xs->error = XS_DRIVER_STUFFUP; splx(s); return(TRY_AGAIN_LATER); } sc->targets[target]->status = TARST_PROBING; sc->targets[target]->flags = 0; sc->targets[target]->id = sc->clock_div << 24; /* scntl3 */ sc->targets[target]->id |= target << 16; /* id */ /* sc->targets[target]->id |= 0x0 << 8; scxfer is 0 */ /* get a lun switch script */ sc->targets[target]->lunsw = siop_get_lunsw(sc); if (sc->targets[target]->lunsw == NULL) { printf("%s: can't alloc lunsw for target %d\n", sc->sc_dev.dv_xname, target); xs->error = XS_DRIVER_STUFFUP; splx(s); return(TRY_AGAIN_LATER); } for (i=0; i < 8; i++) sc->targets[target]->siop_lun[i] = NULL; siop_add_reselsw(sc, target); } if (sc->targets[target]->siop_lun[lun] == NULL) { sc->targets[target]->siop_lun[lun] = malloc(sizeof(struct siop_lun), M_DEVBUF, M_NOWAIT); if (sc->targets[target]->siop_lun[lun] == NULL) { printf("%s: can't alloc siop_lun for target %d " "lun %d\n", sc->sc_dev.dv_xname, target, lun); xs->error = XS_DRIVER_STUFFUP; splx(s); return(TRY_AGAIN_LATER); } memset(sc->targets[target]->siop_lun[lun], 0, sizeof(struct siop_lun)); } siop_cmd->siop_target = sc->targets[target]; siop_cmd->xs = xs; siop_cmd->flags = 0; siop_cmd->status = CMDST_READY; /* load the DMA maps */ error = bus_dmamap_load(sc->sc_dmat, siop_cmd->dmamap_cmd, xs->cmd, xs->cmdlen, NULL, BUS_DMA_NOWAIT); if (error) { printf("%s: unable to load cmd DMA map: %d\n", sc->sc_dev.dv_xname, error); xs->error = XS_DRIVER_STUFFUP; splx(s); return(TRY_AGAIN_LATER); } if (xs->flags & (SCSI_DATA_IN | SCSI_DATA_OUT)) { error = bus_dmamap_load(sc->sc_dmat, siop_cmd->dmamap_data, xs->data, xs->datalen, NULL, BUS_DMA_NOWAIT); if (error) { printf("%s: unable to load cmd DMA map: %d\n", sc->sc_dev.dv_xname, error); xs->error = XS_DRIVER_STUFFUP; bus_dmamap_unload(sc->sc_dmat, siop_cmd->dmamap_cmd); splx(s); return(TRY_AGAIN_LATER); } bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_data, (xs->flags & SCSI_DATA_IN) ? BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE); } bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_cmd, BUS_DMASYNC_PREWRITE); siop_setuptables(siop_cmd); TAILQ_INSERT_TAIL(&sc->ready_list, siop_cmd, next); siop_start(sc); if (xs->flags & SCSI_POLL) { /* poll for command completion */ for(i = xs->timeout; i > 0; i--) { siop_intr(sc); if (xs->flags & ITSDONE) { if ((xs->cmd->opcode == INQUIRY) && (xs->sc_link->lun == 0) && (xs->error == XS_NOERROR)) { inqdata = (struct scsi_inquiry_data *)xs->data; if (inqdata->flags & SID_CmdQue) { sc->targets[target]->flags |= TARF_TAG; xs->sc_link->openings += SIOP_NTAG - SIOP_OPENINGS; } if ((inqdata->flags & SID_WBus16) && (sc->features & SF_BUS_WIDE)) sc->targets[target]->flags |= TARF_WIDE; if (inqdata->flags & SID_Sync) sc->targets[target]->flags |= TARF_SYNC; if (sc->targets[target]->flags & (TARF_WIDE | TARF_SYNC)) { sc->targets[target]->status = TARST_ASYNC; siop_add_dev(sc, target, lun); } else { sc->targets[target]->status = TARST_OK; siop_print_info(sc, target); } } break; } delay(1000); } splx(s); if (i == 0) { siop_timeout(siop_cmd); while ((xs->flags & ITSDONE) == 0) siop_intr(sc); } return (COMPLETE); } splx(s); return (SUCCESSFULLY_QUEUED); } void siop_start(sc) struct siop_softc *sc; { struct siop_cmd *siop_cmd, *next_siop_cmd; struct siop_lun *siop_lun; u_int32_t dsa; int timeout; int target, lun, tag, slot; int newcmd = 0; int doingready = 0; /* * first make sure to read valid data */ siop_script_sync(sc, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); /* * The queue management here is a bit tricky: the script always looks * at the slots from first to last, so if we always use the first * free slot commands can stay at the tail of the queue ~forever. * The algorithm used here is to restart from the head when we know * that the queue is empty, and only add commands after the last one. * When we're at the end of the queue wait for the script to clear it. * The best thing to do here would be to implement a circular queue, * but using only 53c720 features this can be "interesting". * A mid-way solution could be to implement 2 queues and swap orders. */ slot = sc->sc_currschedslot; /* * If the instruction is 0x80000000 (JUMP foo, IF FALSE) the slot is * free. As this is the last used slot, all previous slots are free, * we can restart from 1. * slot 0 is reserved for request sense commands. */ if (siop_script_read(sc, (Ent_script_sched_slot0 / 4) + slot * 2) == 0x80000000) { slot = sc->sc_currschedslot = 1; } else { slot++; } /* first handle commands from the urgent list */ siop_cmd = TAILQ_FIRST(&sc->urgent_list); again: for (; siop_cmd != NULL; siop_cmd = next_siop_cmd) { next_siop_cmd = TAILQ_NEXT(siop_cmd, next); #ifdef DIAGNOSTIC if (siop_cmd->status != CMDST_READY && siop_cmd->status != CMDST_SENSE) panic("siop: non-ready cmd in ready list"); #endif target = siop_cmd->xs->sc_link->target; lun = siop_cmd->xs->sc_link->lun; siop_lun = sc->targets[target]->siop_lun[lun]; /* if non-tagged command active, wait */ if (siop_lun->siop_tag[0].active != NULL) continue; /* * if we're in a queue full condition don't start a new * command, unless it's a request sense */ if ((siop_lun->lun_flags & SIOP_LUNF_FULL) && siop_cmd->status == CMDST_READY) continue; /* find a free tag if needed */ if (siop_cmd->flags & CMDFL_TAG) { for (tag = 1; tag < SIOP_NTAG; tag++) { if (siop_lun->siop_tag[tag].active == NULL) break; } if (tag == SIOP_NTAG) /* no free tag */ continue; } else { tag = 0; } siop_cmd->tag = tag; /* * find a free scheduler slot and load it. If it's a request * sense we need to use slot 0. */ if (siop_cmd->status != CMDST_SENSE) { for (; slot < SIOP_NSLOTS; slot++) { /* * If cmd if 0x80000000 the slot is free */ if (siop_script_read(sc, (Ent_script_sched_slot0 / 4) + slot * 2) == 0x80000000) break; } /* no more free slots, no need to continue */ if (slot == SIOP_NSLOTS) { goto end; } } else { slot = 0; if (siop_script_read(sc, Ent_script_sched_slot0 / 4) != 0x80000000) goto end; } #ifdef SIOP_DEBUG_SCHED printf("using slot %d for DSA 0x%lx\n", slot, (u_long)siop_cmd->dsa); #endif /* Ok, we can add the tag message */ if (tag > 0) { #ifdef DIAGNOSTIC int msgcount = letoh32(siop_cmd->siop_tables.t_msgout.count); if (msgcount != 1) printf("%s:%d:%d: tag %d with msgcount %d\n", sc->sc_dev.dv_xname, target, lun, tag, msgcount); #endif if (siop_cmd->xs->bp != NULL && (siop_cmd->xs->bp->b_flags & B_ASYNC)) siop_cmd->siop_tables.msg_out[1] = MSG_SIMPLE_Q_TAG; else siop_cmd->siop_tables.msg_out[1] = MSG_ORDERED_Q_TAG; siop_cmd->siop_tables.msg_out[2] = tag; siop_cmd->siop_tables.t_msgout.count = htole32(3); } /* note that we started a new command */ newcmd = 1; /* mark command as active */ if (siop_cmd->status == CMDST_READY) { siop_cmd->status = CMDST_ACTIVE; } else if (siop_cmd->status == CMDST_SENSE) { siop_cmd->status = CMDST_SENSE_ACTIVE; } else panic("siop_start: bad status"); if (doingready) TAILQ_REMOVE(&sc->ready_list, siop_cmd, next); else TAILQ_REMOVE(&sc->urgent_list, siop_cmd, next); siop_lun->siop_tag[tag].active = siop_cmd; /* patch scripts with DSA addr */ dsa = siop_cmd->dsa; /* first reselect switch, if we have an entry */ if (siop_lun->siop_tag[tag].reseloff > 0) siop_script_write(sc, siop_lun->siop_tag[tag].reseloff + 1, dsa + sizeof(struct siop_xfer_common) + Ent_ldsa_reload_dsa); /* CMD script: MOVE MEMORY addr */ siop_cmd->siop_xfer->resel[E_ldsa_abs_slot_Used[0]] = htole32(sc->sc_scriptaddr + Ent_script_sched_slot0 + slot * 8); siop_table_sync(siop_cmd, BUS_DMASYNC_PREWRITE); /* scheduler slot: JUMP ldsa_select */ siop_script_write(sc, (Ent_script_sched_slot0 / 4) + slot * 2 + 1, dsa + sizeof(struct siop_xfer_common) + Ent_ldsa_select); /* handle timeout */ if (siop_cmd->status == CMDST_ACTIVE) { if ((siop_cmd->xs->flags & SCSI_POLL) == 0) { /* start expire timer */ timeout = (u_int64_t) siop_cmd->xs->timeout * (u_int64_t)hz / 1000; if (timeout == 0) timeout = 1; timeout_add(&siop_cmd->xs->stimeout, timeout); } } /* * Change JUMP cmd so that this slot will be handled */ siop_script_write(sc, (Ent_script_sched_slot0 / 4) + slot * 2, 0x80080000); /* if we're using the request sense slot, stop here */ if (slot == 0) goto end; sc->sc_currschedslot = slot; slot++; } if (doingready == 0) { /* now process ready list */ doingready = 1; siop_cmd = TAILQ_FIRST(&sc->ready_list); goto again; } end: /* if nothing changed no need to flush cache and wakeup script */ if (newcmd == 0) return; /* make sure SCRIPT processor will read valid data */ siop_script_sync(sc,BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); /* Signal script it has some work to do */ bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_ISTAT, ISTAT_SIGP); /* and wait for IRQ */ return; } void siop_timeout(v) void *v; { struct siop_cmd *siop_cmd = v; struct siop_softc *sc = siop_cmd->siop_sc; int s; sc_print_addr(siop_cmd->xs->sc_link); printf("command timeout\n"); s = splbio(); /* reset the scsi bus */ siop_resetbus(sc); /* deactivate callout */ timeout_del(&siop_cmd->xs->stimeout); /* * Mark command as being timed out and just return. The bus * reset will generate an interrupt, which will be handled * in siop_intr(). */ siop_cmd->flags |= CMDFL_TIMEOUT; splx(s); return; } void siop_dump_script(sc) struct siop_softc *sc; { int i; for (i = 0; i < PAGE_SIZE / 4; i += 2) { printf("0x%04x: 0x%08x 0x%08x", i * 4, letoh32(sc->sc_script[i]), letoh32(sc->sc_script[i+1])); if ((letoh32(sc->sc_script[i]) & 0xe0000000) == 0xc0000000) { i++; printf(" 0x%08x", letoh32(sc->sc_script[i+1])); } printf("\n"); } } int siop_morecbd(sc) struct siop_softc *sc; { int error, i, j; bus_dma_segment_t seg; int rseg; struct siop_cbd *newcbd; bus_addr_t dsa; u_int32_t *scr; /* allocate a new list head */ newcbd = malloc(sizeof(struct siop_cbd), M_DEVBUF, M_NOWAIT); if (newcbd == NULL) { printf("%s: can't allocate memory for command descriptors " "head\n", sc->sc_dev.dv_xname); return ENOMEM; } memset(newcbd, 0, sizeof(struct siop_cbd)); /* allocate cmd list */ newcbd->cmds = malloc(sizeof(struct siop_cmd) * SIOP_NCMDPB, M_DEVBUF, M_NOWAIT); if (newcbd->cmds == NULL) { printf("%s: can't allocate memory for command descriptors\n", sc->sc_dev.dv_xname); error = ENOMEM; goto bad3; } memset(newcbd->cmds, 0, sizeof(struct siop_cmd) * SIOP_NCMDPB); error = bus_dmamem_alloc(sc->sc_dmat, PAGE_SIZE, PAGE_SIZE, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT); if (error) { printf("%s: unable to allocate cbd DMA memory, error = %d\n", sc->sc_dev.dv_xname, error); goto bad2; } error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, PAGE_SIZE, (caddr_t *)&newcbd->xfers, BUS_DMA_NOWAIT|BUS_DMA_COHERENT); if (error) { printf("%s: unable to map cbd DMA memory, error = %d\n", sc->sc_dev.dv_xname, error); goto bad2; } error = bus_dmamap_create(sc->sc_dmat, PAGE_SIZE, 1, PAGE_SIZE, 0, BUS_DMA_NOWAIT, &newcbd->xferdma); if (error) { printf("%s: unable to create cbd DMA map, error = %d\n", sc->sc_dev.dv_xname, error); goto bad1; } error = bus_dmamap_load(sc->sc_dmat, newcbd->xferdma, newcbd->xfers, PAGE_SIZE, NULL, BUS_DMA_NOWAIT); if (error) { printf("%s: unable to load cbd DMA map, error = %d\n", sc->sc_dev.dv_xname, error); goto bad0; } #ifdef DEBUG printf("%s: alloc newcdb at PHY addr 0x%lx\n", sc->sc_dev.dv_xname, (unsigned long)newcbd->xferdma->dm_segs[0].ds_addr); #endif for (i = 0; i < SIOP_NCMDPB; i++) { error = bus_dmamap_create(sc->sc_dmat, MAXPHYS, SIOP_NSG, MAXPHYS, 0, BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, &newcbd->cmds[i].dmamap_data); if (error) { printf("%s: unable to create data DMA map for cbd: " "error %d\n", sc->sc_dev.dv_xname, error); goto bad0; } error = bus_dmamap_create(sc->sc_dmat, sizeof(struct scsi_generic), 1, sizeof(struct scsi_generic), 0, BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, &newcbd->cmds[i].dmamap_cmd); if (error) { printf("%s: unable to create cmd DMA map for cbd %d\n", sc->sc_dev.dv_xname, error); goto bad0; } newcbd->cmds[i].siop_sc = sc; newcbd->cmds[i].siop_cbdp = newcbd; newcbd->cmds[i].siop_xfer = &newcbd->xfers[i]; memset(newcbd->cmds[i].siop_xfer, 0, sizeof(struct siop_xfer)); newcbd->cmds[i].dsa = newcbd->xferdma->dm_segs[0].ds_addr + i * sizeof(struct siop_xfer); dsa = newcbd->cmds[i].dsa; newcbd->cmds[i].status = CMDST_FREE; newcbd->cmds[i].siop_tables.t_msgout.count= htole32(1); newcbd->cmds[i].siop_tables.t_msgout.addr = htole32(dsa); newcbd->cmds[i].siop_tables.t_msgin.count= htole32(1); newcbd->cmds[i].siop_tables.t_msgin.addr = htole32(dsa + 8); newcbd->cmds[i].siop_tables.t_extmsgin.count= htole32(2); newcbd->cmds[i].siop_tables.t_extmsgin.addr = htole32(dsa + 9); newcbd->cmds[i].siop_tables.t_extmsgdata.addr = htole32(dsa + 11); newcbd->cmds[i].siop_tables.t_status.count= htole32(1); newcbd->cmds[i].siop_tables.t_status.addr = htole32(dsa + 16); /* The select/reselect script */ scr = &newcbd->cmds[i].siop_xfer->resel[0]; for (j = 0; j < sizeof(load_dsa) / sizeof(load_dsa[0]); j++) scr[j] = htole32(load_dsa[j]); /* * 0x78000000 is a 'move data8 to reg'. data8 is the second * octet, reg offset is the third. */ scr[Ent_rdsa0 / 4] = htole32(0x78100000 | ((dsa & 0x000000ff) << 8)); scr[Ent_rdsa1 / 4] = htole32(0x78110000 | ( dsa & 0x0000ff00 )); scr[Ent_rdsa2 / 4] = htole32(0x78120000 | ((dsa & 0x00ff0000) >> 8)); scr[Ent_rdsa3 / 4] = htole32(0x78130000 | ((dsa & 0xff000000) >> 16)); scr[E_ldsa_abs_reselected_Used[0]] = htole32(sc->sc_scriptaddr + Ent_reselected); scr[E_ldsa_abs_reselect_Used[0]] = htole32(sc->sc_scriptaddr + Ent_reselect); scr[E_ldsa_abs_selected_Used[0]] = htole32(sc->sc_scriptaddr + Ent_selected); scr[E_ldsa_abs_data_Used[0]] = htole32(dsa + sizeof(struct siop_xfer_common) + Ent_ldsa_data); /* JUMP foo, IF FALSE - used by MOVE MEMORY to clear the slot */ scr[Ent_ldsa_data / 4] = htole32(0x80000000); TAILQ_INSERT_TAIL(&sc->free_list, &newcbd->cmds[i], next); #ifdef SIOP_DEBUG printf("tables[%d]: in=0x%x out=0x%x status=0x%x\n", i, letoh32(newcbd->cmds[i].siop_tables.t_msgin.addr), letoh32(newcbd->cmds[i].siop_tables.t_msgout.addr), letoh32(newcbd->cmds[i].siop_tables.t_status.addr)); #endif } TAILQ_INSERT_TAIL(&sc->cmds, newcbd, next); return 0; bad0: bus_dmamap_destroy(sc->sc_dmat, newcbd->xferdma); bad1: bus_dmamem_free(sc->sc_dmat, &seg, rseg); bad2: free(newcbd->cmds, M_DEVBUF); bad3: free(newcbd, M_DEVBUF); return error; } struct siop_lunsw * siop_get_lunsw(sc) struct siop_softc *sc; { struct siop_lunsw *lunsw; int i; if (sc->script_free_lo + (sizeof(lun_switch) / sizeof(lun_switch[0])) >= sc->script_free_hi) return NULL; lunsw = TAILQ_FIRST(&sc->lunsw_list); if (lunsw != NULL) { #ifdef SIOP_DEBUG printf("siop_get_lunsw got lunsw at offset %d\n", lunsw->lunsw_off); #endif TAILQ_REMOVE(&sc->lunsw_list, lunsw, next); return lunsw; } lunsw = malloc(sizeof(struct siop_lunsw), M_DEVBUF, M_NOWAIT); if (lunsw == NULL) return NULL; memset(lunsw, 0, sizeof(struct siop_lunsw)); #ifdef SIOP_DEBUG printf("allocating lunsw at offset %d\n", sc->script_free_lo); #endif if (sc->features & SF_CHIP_RAM) { bus_space_write_region_4(sc->sc_ramt, sc->sc_ramh, sc->script_free_lo * 4, lun_switch, sizeof(lun_switch) / sizeof(lun_switch[0])); bus_space_write_4(sc->sc_ramt, sc->sc_ramh, (sc->script_free_lo + E_abs_lunsw_return_Used[0]) * 4, sc->sc_scriptaddr + Ent_lunsw_return); } else { for (i = 0; i < sizeof(lun_switch) / sizeof(lun_switch[0]); i++) sc->sc_script[sc->script_free_lo + i] = htole32(lun_switch[i]); sc->sc_script[sc->script_free_lo + E_abs_lunsw_return_Used[0]] = htole32(sc->sc_scriptaddr + Ent_lunsw_return); } lunsw->lunsw_off = sc->script_free_lo; lunsw->lunsw_size = sizeof(lun_switch) / sizeof(lun_switch[0]); sc->script_free_lo += lunsw->lunsw_size; if (sc->script_free_lo > 1024) printf("%s: script_free_lo (%d) > 1024\n", sc->sc_dev.dv_xname, sc->script_free_lo); siop_script_sync(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); return lunsw; } void siop_add_reselsw(sc, target) struct siop_softc *sc; int target; { int i; struct siop_lun *siop_lun; /* * add an entry to resel switch */ siop_script_sync(sc, BUS_DMASYNC_POSTWRITE); for (i = 0; i < 15; i++) { sc->targets[target]->reseloff = Ent_resel_targ0 / 4 + i * 2; if ((siop_script_read(sc, sc->targets[target]->reseloff) & 0xff) == 0xff) { /* it's free */ #ifdef SIOP_DEBUG printf("siop: target %d slot %d offset %d\n", target, i, sc->targets[target]->reseloff); #endif /* JUMP abs_foo, IF target | 0x80; */ siop_script_write(sc, sc->targets[target]->reseloff, 0x800c0080 | target); siop_script_write(sc, sc->targets[target]->reseloff + 1, sc->sc_scriptaddr + sc->targets[target]->lunsw->lunsw_off * 4 + Ent_lun_switch_entry); break; } } if (i == 15) /* no free slot, shouldn't happen */ panic("siop: resel switch full"); sc->sc_ntargets++; for (i = 0; i < 8; i++) { siop_lun = sc->targets[target]->siop_lun[i]; if (siop_lun == NULL) continue; if (siop_lun->reseloff > 0) { siop_lun->reseloff = 0; siop_add_dev(sc, target, i); } } siop_update_scntl3(sc, sc->targets[target]); siop_script_sync(sc, BUS_DMASYNC_PREWRITE); } void siop_update_scntl3(sc, siop_target) struct siop_softc *sc; struct siop_target *siop_target; { /* MOVE target->id >> 24 TO SCNTL3 */ siop_script_write(sc, siop_target->lunsw->lunsw_off + (Ent_restore_scntl3 / 4), 0x78030000 | ((siop_target->id >> 16) & 0x0000ff00)); /* MOVE target->id >> 8 TO SXFER */ siop_script_write(sc, siop_target->lunsw->lunsw_off + (Ent_restore_scntl3 / 4) + 2, 0x78050000 | (siop_target->id & 0x0000ff00)); siop_script_sync(sc, BUS_DMASYNC_PREWRITE); } void siop_add_dev(sc, target, lun) struct siop_softc *sc; int target; int lun; { struct siop_lunsw *lunsw; struct siop_lun *siop_lun = sc->targets[target]->siop_lun[lun]; int i, ntargets; if (siop_lun->reseloff > 0) return; lunsw = sc->targets[target]->lunsw; if ((lunsw->lunsw_off + lunsw->lunsw_size) < sc->script_free_lo) { /* * Can't extend this slot. Probably not worth trying to deal * with this case. */ #ifdef DEBUG printf("%s:%d:%d: can't allocate a lun sw slot\n", sc->sc_dev.dv_xname, target, lun); #endif return; } /* count how many free targets we still have to probe */ ntargets = (sc->sc_link.adapter_buswidth - 1) - 1 - sc->sc_ntargets; /* * We need 8 bytes for the lun sw additional entry, and * eventually sizeof(tag_switch) for the tag switch entry. * Keep enough free space for the free targets that could be * probed later. */ if (sc->script_free_lo + 2 + (ntargets * sizeof(lun_switch) / sizeof(lun_switch[0])) >= ((sc->targets[target]->flags & TARF_TAG) ? sc->script_free_hi - (sizeof(tag_switch) / sizeof(tag_switch[0])) : sc->script_free_hi)) { /* * Not enough space, but probably not worth dealing with it. * We can hold 13 tagged-queuing capable devices in the 4k RAM. */ #ifdef DEBUG printf("%s:%d:%d: not enough memory for a lun sw slot\n", sc->sc_dev.dv_xname, target, lun); #endif return; } #ifdef SIOP_DEBUG printf("%s:%d:%d: allocate lun sw entry\n", sc->sc_dev.dv_xname, target, lun); #endif /* INT int_resellun */ siop_script_write(sc, sc->script_free_lo, 0x98080000); siop_script_write(sc, sc->script_free_lo + 1, A_int_resellun); /* Now the slot entry: JUMP abs_foo, IF lun */ siop_script_write(sc, sc->script_free_lo - 2, 0x800c0000 | lun); siop_script_write(sc, sc->script_free_lo - 1, 0); siop_lun->reseloff = sc->script_free_lo - 2; lunsw->lunsw_size += 2; sc->script_free_lo += 2; if (sc->targets[target]->flags & TARF_TAG) { /* we need a tag switch */ sc->script_free_hi -= sizeof(tag_switch) / sizeof(tag_switch[0]); if (sc->features & SF_CHIP_RAM) { bus_space_write_region_4(sc->sc_ramt, sc->sc_ramh, sc->script_free_hi * 4, tag_switch, sizeof(tag_switch) / sizeof(tag_switch[0])); } else { for(i = 0; i < sizeof(tag_switch) / sizeof(tag_switch[0]); i++) { sc->sc_script[sc->script_free_hi + i] = htole32(tag_switch[i]); } } siop_script_write(sc, siop_lun->reseloff + 1, sc->sc_scriptaddr + sc->script_free_hi * 4 + Ent_tag_switch_entry); for (i = 0; i < SIOP_NTAG; i++) { siop_lun->siop_tag[i].reseloff = sc->script_free_hi + (Ent_resel_tag0 / 4) + i * 2; } } else { /* non-tag case; just work with the lun switch */ siop_lun->siop_tag[0].reseloff = sc->targets[target]->siop_lun[lun]->reseloff; } siop_script_sync(sc, BUS_DMASYNC_PREWRITE); } void siop_del_dev(sc, target, lun) struct siop_softc *sc; int target; int lun; { int i; #ifdef SIOP_DEBUG printf("%s:%d:%d: free lun sw entry\n", sc->sc_dev.dv_xname, target, lun); #endif if (sc->targets[target] == NULL) return; free(sc->targets[target]->siop_lun[lun], M_DEVBUF); sc->targets[target]->siop_lun[lun] = NULL; /* XXX compact sw entry too ? */ /* check if we can free the whole target */ for (i = 0; i < 8; i++) { if (sc->targets[target]->siop_lun[i] != NULL) return; } #ifdef SIOP_DEBUG printf("%s: free siop_target for target %d lun %d lunsw offset %d\n", sc->sc_dev.dv_xname, target, lun, sc->targets[target]->lunsw->lunsw_off); #endif /* * nothing here, free the target struct and resel * switch entry */ siop_script_write(sc, sc->targets[target]->reseloff, 0x800c00ff); siop_script_sync(sc, BUS_DMASYNC_PREWRITE); TAILQ_INSERT_TAIL(&sc->lunsw_list, sc->targets[target]->lunsw, next); free(sc->targets[target], M_DEVBUF); sc->targets[target] = NULL; sc->sc_ntargets--; } #ifdef SIOP_STATS void siop_printstats() { printf("siop_stat_intr %d\n", siop_stat_intr); printf("siop_stat_intr_shortxfer %d\n", siop_stat_intr_shortxfer); printf("siop_stat_intr_xferdisc %d\n", siop_stat_intr_xferdisc); printf("siop_stat_intr_sdp %d\n", siop_stat_intr_sdp); printf("siop_stat_intr_done %d\n", siop_stat_intr_done); printf("siop_stat_intr_lunresel %d\n", siop_stat_intr_lunresel); printf("siop_stat_intr_qfull %d\n", siop_stat_intr_qfull); } #endif