/* $NetBSD: aic7xxx.c,v 1.46 2000/03/25 21:09:08 fvdl Exp $ */ /* * Generic driver for the aic7xxx based adaptec SCSI controllers * Product specific probe and attach routines can be found in: * i386/eisa/ahc_eisa.c 27/284X and aic7770 motherboard controllers * pci/ahc_pci.c 3985, 3980, 3940, 2940, aic7895, aic7890, * aic7880, aic7870, aic7860, and aic7850 controllers * * Copyright (c) 1994, 1995, 1996, 1997, 1998, 1999, 2000 Justin T. Gibbs. * 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, * without modification. * 2. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * Alternatively, this software may be distributed under the terms of the * the GNU Public License ("GPL"). * * 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. * * $FreeBSD: src/sys/dev/aic7xxx/aic7xxx.c,v 1.42 2000/03/18 22:28:18 gibbs Exp $ */ /* * A few notes on features of the driver. * * SCB paging takes advantage of the fact that devices stay disconnected * from the bus a relatively long time and that while they're disconnected, * having the SCBs for these transactions down on the host adapter is of * little use. Instead of leaving this idle SCB down on the card we copy * it back up into kernel memory and reuse the SCB slot on the card to * schedule another transaction. This can be a real payoff when doing random * I/O to tagged queueing devices since there are more transactions active at * once for the device to sort for optimal seek reduction. The algorithm goes * like this... * * The sequencer maintains two lists of its hardware SCBs. The first is the * singly linked free list which tracks all SCBs that are not currently in * use. The second is the doubly linked disconnected list which holds the * SCBs of transactions that are in the disconnected state sorted most * recently disconnected first. When the kernel queues a transaction to * the card, a hardware SCB to "house" this transaction is retrieved from * either of these two lists. If the SCB came from the disconnected list, * a check is made to see if any data transfer or SCB linking (more on linking * in a bit) information has been changed since it was copied from the host * and if so, DMAs the SCB back up before it can be used. Once a hardware * SCB has been obtained, the SCB is DMAed from the host. Before any work * can begin on this SCB, the sequencer must ensure that either the SCB is * for a tagged transaction or the target is not already working on another * non-tagged transaction. If a conflict arises in the non-tagged case, the * sequencer finds the SCB for the active transactions and sets the SCB_LINKED * field in that SCB to this next SCB to execute. To facilitate finding * active non-tagged SCBs, the last four bytes of up to the first four hardware * SCBs serve as a storage area for the currently active SCB ID for each * target. * * When a device reconnects, a search is made of the hardware SCBs to find * the SCB for this transaction. If the search fails, a hardware SCB is * pulled from either the free or disconnected SCB list and the proper * SCB is DMAed from the host. If the MK_MESSAGE control bit is set * in the control byte of the SCB while it was disconnected, the sequencer * will assert ATN and attempt to issue a message to the host. * * When a command completes, a check for non-zero status and residuals is * made. If either of these conditions exists, the SCB is DMAed back up to * the host so that it can interpret this information. Additionally, in the * case of bad status, the sequencer generates a special interrupt and pauses * itself. This allows the host to setup a request sense command if it * chooses for this target synchronously with the error so that sense * information isn't lost. * */ #include "opt_ddb.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define MAX(a,b) (((a) > (b)) ? (a) : (b)) #define MIN(a,b) (((a) < (b)) ? (a) : (b)) #define ALL_CHANNELS '\0' #define ALL_TARGETS_MASK 0xFFFF #define INITIATOR_WILDCARD (~0) #define SIM_IS_SCSIBUS_B(ahc, sc_link) \ ((sc_link)->scsipi_scsi.scsibus == (ahc)->sc_link_b.scsipi_scsi.scsibus) #define SIM_CHANNEL(ahc, sc_link) \ (SIM_IS_SCSIBUS_B(ahc, sc_link) ? 'B' : 'A') #define SIM_SCSI_ID(ahc, sc_link) \ (SIM_IS_SCSIBUS_B(ahc, sc_link) ? ahc->our_id_b : ahc->our_id) #define SCB_IS_SCSIBUS_B(scb) \ (((scb)->hscb->tcl & SELBUSB) != 0) #define SCB_TARGET(scb) \ (((scb)->hscb->tcl & TID) >> 4) #define SCB_CHANNEL(scb) \ (SCB_IS_SCSIBUS_B(scb) ? 'B' : 'A') #define SCB_LUN(scb) \ ((scb)->hscb->tcl & LID) #define SCB_TARGET_OFFSET(scb) \ (SCB_TARGET(scb) + (SCB_IS_SCSIBUS_B(scb) ? 8 : 0)) #define SCB_TARGET_MASK(scb) \ (0x01 << (SCB_TARGET_OFFSET(scb))) #define TCL_CHANNEL(ahc, tcl) \ ((((ahc)->features & AHC_TWIN) && ((tcl) & SELBUSB)) ? 'B' : 'A') #define TCL_SCSI_ID(ahc, tcl) \ (TCL_CHANNEL((ahc), (tcl)) == 'B' ? (ahc)->our_id_b : (ahc)->our_id) #define TCL_TARGET(tcl) (((tcl) & TID) >> TCL_TARGET_SHIFT) #define TCL_LUN(tcl) ((tcl) & LID) #define XS_TCL(ahc, xs) \ ((((xs)->sc_link->scsipi_scsi.target << 4) & 0xF0) \ | (SIM_IS_SCSIBUS_B((ahc), (xs)->sc_link) ? SELBUSB : 0) \ | ((xs)->sc_link->scsipi_scsi.lun & 0x07)) char *ahc_chip_names[] = { "NONE", "aic7770", "aic7850", "aic7855", "aic7859", "aic7860", "aic7870", "aic7880", "aic7890/91", "aic7892", "aic7895", "aic7896/97", "aic7899" }; typedef enum { ROLE_UNKNOWN, ROLE_INITIATOR, ROLE_TARGET } role_t; struct ahc_devinfo { int our_scsiid; int target_offset; u_int16_t target_mask; u_int8_t target; u_int8_t lun; char channel; role_t role; /* * Only guaranteed to be correct if not * in the busfree state. */ }; typedef enum { SEARCH_COMPLETE, SEARCH_COUNT, SEARCH_REMOVE } ahc_search_action; #ifdef AHC_DEBUG static int ahc_debug = AHC_DEBUG; #endif static int ahcinitscbdata(struct ahc_softc *); static void ahcfiniscbdata(struct ahc_softc *); #if UNUSED static void ahc_dump_targcmd(struct target_cmd *); #endif static void ahc_shutdown(void *arg); static int32_t ahc_action(struct scsipi_xfer *); static int ahc_execute_scb(void *, bus_dma_segment_t *, int); static int ahc_poll(struct ahc_softc *, int); static int ahc_setup_data(struct ahc_softc *, struct scsipi_xfer *, struct scb *); static void ahc_freeze_devq(struct ahc_softc *, struct scsipi_link *); static void ahcallocscbs(struct ahc_softc *); #if UNUSED static void ahc_scb_devinfo(struct ahc_softc *, struct ahc_devinfo *, struct scb *); #endif static void ahc_fetch_devinfo(struct ahc_softc *, struct ahc_devinfo *); static void ahc_compile_devinfo(struct ahc_devinfo *, u_int, u_int, u_int, char, role_t); static u_int ahc_abort_wscb(struct ahc_softc *, u_int, u_int); static void ahc_done(struct ahc_softc *, struct scb *); static struct tmode_tstate * ahc_alloc_tstate(struct ahc_softc *, u_int, char); #if UNUSED static void ahc_free_tstate(struct ahc_softc *, u_int, char, int); #endif static void ahc_handle_seqint(struct ahc_softc *, u_int); static void ahc_handle_scsiint(struct ahc_softc *, u_int); static void ahc_build_transfer_msg(struct ahc_softc *, struct ahc_devinfo *); static void ahc_setup_initiator_msgout(struct ahc_softc *, struct ahc_devinfo *, struct scb *); static void ahc_setup_target_msgin(struct ahc_softc *, struct ahc_devinfo *); static void ahc_clear_msg_state(struct ahc_softc *); static void ahc_handle_message_phase(struct ahc_softc *, struct scsipi_link *); static int ahc_sent_msg(struct ahc_softc *, u_int, int); static int ahc_parse_msg(struct ahc_softc *, struct scsipi_link *, struct ahc_devinfo *); static void ahc_handle_ign_wide_residue(struct ahc_softc *, struct ahc_devinfo *); static void ahc_handle_devreset(struct ahc_softc *, struct ahc_devinfo *, int, char *, int); #ifdef AHC_DUMP_SEQ static void ahc_dumpseq(struct ahc_softc *); #endif static void ahc_loadseq(struct ahc_softc *); static int ahc_check_patch(struct ahc_softc *, struct patch **, int, int *); static void ahc_download_instr(struct ahc_softc *, int, u_int8_t *); static int ahc_match_scb(struct scb *, int, char, int, u_int, role_t); #if defined(AHC_DEBUG) static void ahc_print_scb(struct scb *); #endif static int ahc_search_qinfifo(struct ahc_softc *, int, char, int, u_int, role_t, scb_flag, ahc_search_action); static int ahc_reset_channel(struct ahc_softc *, char, int); static int ahc_abort_scbs(struct ahc_softc *, int, char, int, u_int, role_t, int); static int ahc_search_disc_list(struct ahc_softc *, int, char, int, u_int, int, int, int); static u_int ahc_rem_scb_from_disc_list(struct ahc_softc *, u_int, u_int); static void ahc_add_curscb_to_free_list(struct ahc_softc *); static void ahc_clear_intstat(struct ahc_softc *); static void ahc_reset_current_bus(struct ahc_softc *); static struct ahc_syncrate * ahc_devlimited_syncrate(struct ahc_softc *, u_int *); static struct ahc_syncrate * ahc_find_syncrate(struct ahc_softc *, u_int *, u_int); static u_int ahc_find_period(struct ahc_softc *, u_int, u_int); static void ahc_validate_offset(struct ahc_softc *, struct ahc_syncrate *, u_int *, int); static void ahc_update_target_msg_request(struct ahc_softc *, struct ahc_devinfo *, struct ahc_initiator_tinfo *, int, int); static void ahc_set_syncrate(struct ahc_softc *, struct ahc_devinfo *, struct ahc_syncrate *, u_int, u_int, u_int, int, int); static void ahc_set_width(struct ahc_softc *, struct ahc_devinfo *, u_int, u_int, int, int); static void ahc_set_tags(struct ahc_softc *, struct ahc_devinfo *, int); static void ahc_construct_sdtr(struct ahc_softc *, u_int, u_int); static void ahc_construct_wdtr(struct ahc_softc *, u_int); static void ahc_calc_residual(struct scb *); static void ahc_update_pending_syncrates(struct ahc_softc *); static void ahc_set_recoveryscb(struct ahc_softc *, struct scb *); static void ahc_timeout (void *); static __inline int sequencer_paused(struct ahc_softc *); static __inline void pause_sequencer(struct ahc_softc *); static __inline void unpause_sequencer(struct ahc_softc *); static void restart_sequencer(struct ahc_softc *); static __inline u_int ahc_index_busy_tcl(struct ahc_softc *, u_int, int); static __inline void ahc_busy_tcl(struct ahc_softc *, struct scb *); static __inline int ahc_isbusy_tcl(struct ahc_softc *, struct scb *); static __inline void ahc_freeze_ccb(struct scb *); static __inline void ahcsetccbstatus(struct scsipi_xfer *, int); static void ahc_run_qoutfifo(struct ahc_softc *); static __inline struct ahc_initiator_tinfo * ahc_fetch_transinfo(struct ahc_softc *, char, u_int, u_int, struct tmode_tstate **); static void ahcfreescb(struct ahc_softc *, struct scb *); static __inline struct scb *ahcgetscb(struct ahc_softc *); static int ahc_createdmamem(bus_dma_tag_t, int, int, bus_dmamap_t *, caddr_t *, bus_addr_t *, bus_dma_segment_t *, int *, const char *, const char *); static void ahc_freedmamem(bus_dma_tag_t, int, bus_dmamap_t, caddr_t, bus_dma_segment_t *, int); static void ahcminphys(struct buf *); static __inline struct scsipi_xfer *ahc_first_xs(struct ahc_softc *); static __inline void ahc_swap_hscb(struct hardware_scb *); static __inline void ahc_swap_sg(struct ahc_dma_seg *); static void ahc_check_tags(struct ahc_softc *, struct scsipi_xfer *); static int ahc_istagged_device(struct ahc_softc *, struct scsipi_xfer *); #if defined(AHC_DEBUG) && 0 static void ahc_dumptinfo(struct ahc_softc *, struct ahc_initiator_tinfo *); #endif static struct scsipi_device ahc_dev = { NULL, /* Use default error handler */ NULL, /* have a queue, served by this */ NULL, /* have no async handler */ NULL, /* Use default 'done' routine */ }; /* * Pick the first xs for a non-blocked target. */ static __inline struct scsipi_xfer * ahc_first_xs(struct ahc_softc *ahc) { int target; struct scsipi_xfer *xs = TAILQ_FIRST(&ahc->sc_q); if (ahc->queue_blocked) return NULL; while (xs != NULL) { target = xs->sc_link->scsipi_scsi.target; if (ahc->devqueue_blocked[target] == 0 && (!ahc_istagged_device(ahc, xs) && ahc_index_busy_tcl(ahc, XS_TCL(ahc, xs), FALSE) == SCB_LIST_NULL)) break; xs = TAILQ_NEXT(xs, adapter_q); } return xs; } static __inline void ahc_swap_hscb(struct hardware_scb *hscb) { hscb->SG_pointer = htole32(hscb->SG_pointer); hscb->data = htole32(hscb->data); hscb->datalen = htole32(hscb->datalen); /* * No need to swap cmdpointer; it's either NULL or set to * cmdstore_busaddr, which is already swapped. */ } static __inline void ahc_swap_sg(struct ahc_dma_seg *sg) { sg->addr = htole32(sg->addr); sg->len = htole32(sg->len); } static void ahcminphys(bp) struct buf *bp; { /* * Even though the card can transfer up to 16megs per command * we are limited by the number of segments in the dma segment * list that we can hold. The worst case is that all pages are * discontinuous physically, hense the "page per segment" limit * enforced here. */ if (bp->b_bcount > AHC_MAXTRANSFER_SIZE) { bp->b_bcount = AHC_MAXTRANSFER_SIZE; } minphys(bp); } static __inline u_int32_t ahc_hscb_busaddr(struct ahc_softc *ahc, u_int index) { return (ahc->scb_data->hscb_busaddr + (sizeof(struct hardware_scb) * index)); } #define AHC_BUSRESET_DELAY 25 /* Reset delay in us */ static __inline int sequencer_paused(struct ahc_softc *ahc) { return ((ahc_inb(ahc, HCNTRL) & PAUSE) != 0); } static __inline void pause_sequencer(struct ahc_softc *ahc) { ahc_outb(ahc, HCNTRL, ahc->pause); /* * Since the sequencer can disable pausing in a critical section, we * must loop until it actually stops. */ while (sequencer_paused(ahc) == 0) ; } static __inline void unpause_sequencer(struct ahc_softc *ahc) { if ((ahc_inb(ahc, INTSTAT) & (SCSIINT | SEQINT | BRKADRINT)) == 0) ahc_outb(ahc, HCNTRL, ahc->unpause); } /* * Restart the sequencer program from address zero */ static void restart_sequencer(struct ahc_softc *ahc) { u_int i; pause_sequencer(ahc); /* * Everytime we restart the sequencer, there * is the possiblitity that we have restarted * within a three instruction window where an * SCB has been marked free but has not made it * onto the free list. Since SCSI events(bus reset, * unexpected bus free) will always freeze the * sequencer, we cannot close this window. To * avoid losing an SCB, we reconsitute the free * list every time we restart the sequencer. */ ahc_outb(ahc, FREE_SCBH, SCB_LIST_NULL); for (i = 0; i < ahc->scb_data->maxhscbs; i++) { ahc_outb(ahc, SCBPTR, i); if (ahc_inb(ahc, SCB_TAG) == SCB_LIST_NULL) ahc_add_curscb_to_free_list(ahc); } ahc_outb(ahc, SEQCTL, FASTMODE|SEQRESET); unpause_sequencer(ahc); } static __inline u_int ahc_index_busy_tcl(struct ahc_softc *ahc, u_int tcl, int unbusy) { u_int scbid; scbid = ahc->untagged_scbs[tcl]; if (unbusy) { ahc->untagged_scbs[tcl] = SCB_LIST_NULL; bus_dmamap_sync(ahc->parent_dmat, ahc->shared_data_dmamap, UNTAGGEDSCB_OFFSET * 256, 256, BUS_DMASYNC_PREWRITE); } return (scbid); } static __inline void ahc_busy_tcl(struct ahc_softc *ahc, struct scb *scb) { ahc->untagged_scbs[scb->hscb->tcl] = scb->hscb->tag; bus_dmamap_sync(ahc->parent_dmat, ahc->shared_data_dmamap, UNTAGGEDSCB_OFFSET * 256, 256, BUS_DMASYNC_PREWRITE); } static __inline int ahc_isbusy_tcl(struct ahc_softc *ahc, struct scb *scb) { return ahc->untagged_scbs[scb->hscb->tcl] != SCB_LIST_NULL; } static __inline void ahc_freeze_ccb(struct scb *scb) { struct scsipi_xfer *xs = scb->xs; struct ahc_softc *ahc = (struct ahc_softc *)xs->sc_link->adapter_softc; int target; target = xs->sc_link->scsipi_scsi.target; if (!(scb->flags & SCB_FREEZE_QUEUE)) { ahc->devqueue_blocked[target]++; scb->flags |= SCB_FREEZE_QUEUE; } } static __inline void ahcsetccbstatus(struct scsipi_xfer *xs, int status) { xs->error = status; } static __inline struct ahc_initiator_tinfo * ahc_fetch_transinfo(struct ahc_softc *ahc, char channel, u_int our_id, u_int remote_id, struct tmode_tstate **tstate) { /* * Transfer data structures are stored from the perspective * of the target role. Since the parameters for a connection * in the initiator role to a given target are the same as * when the roles are reversed, we pretend we are the target. */ if (channel == 'B') our_id += 8; *tstate = ahc->enabled_targets[our_id]; return (&(*tstate)->transinfo[remote_id]); } static void ahc_run_qoutfifo(struct ahc_softc *ahc) { struct scb *scb; u_int scb_index; bus_dmamap_sync(ahc->parent_dmat, ahc->shared_data_dmamap, 0, 256, BUS_DMASYNC_POSTREAD); while (ahc->qoutfifo[ahc->qoutfifonext] != SCB_LIST_NULL) { scb_index = ahc->qoutfifo[ahc->qoutfifonext]; ahc->qoutfifo[ahc->qoutfifonext++] = SCB_LIST_NULL; scb = &ahc->scb_data->scbarray[scb_index]; if (scb_index >= ahc->scb_data->numscbs || (scb->flags & SCB_ACTIVE) == 0) { printf("%s: WARNING no command for scb %d " "(cmdcmplt)\nQOUTPOS = %d\n", ahc_name(ahc), scb_index, ahc->qoutfifonext - 1); continue; } /* * Save off the residual * if there is one. */ if (scb->hscb->residual_SG_count != 0) ahc_calc_residual(scb); else scb->xs->resid = 0; #ifdef AHC_DEBUG if (ahc_debug & AHC_SHOWSCBS) { scsi_print_addr(scb->xs->sc_link); printf("run_qoutfifo: SCB %x complete\n", scb->hscb->tag); } #endif ahc_done(ahc, scb); } } /* * An scb (and hence an scb entry on the board) is put onto the * free list. */ static void ahcfreescb(struct ahc_softc *ahc, struct scb *scb) { struct hardware_scb *hscb; int opri; hscb = scb->hscb; #ifdef AHC_DEBUG if (ahc_debug & AHC_SHOWSCBALLOC) printf("%s: free SCB tag %x\n", ahc_name(ahc), hscb->tag); #endif opri = splbio(); if ((ahc->flags & AHC_RESOURCE_SHORTAGE) != 0 || (scb->flags & SCB_RECOVERY_SCB) != 0) { ahc->flags &= ~AHC_RESOURCE_SHORTAGE; ahc->queue_blocked = 0; } /* Clean up for the next user */ scb->flags = SCB_FREE; hscb->control = 0; hscb->status = 0; SLIST_INSERT_HEAD(&ahc->scb_data->free_scbs, scb, links); splx(opri); } /* * Get a free scb, either one already assigned to a hardware slot * on the adapter or one that will require an SCB to be paged out before * use. If there are none, see if we can allocate a new SCB. Otherwise * either return an error or sleep. */ static __inline struct scb * ahcgetscb(struct ahc_softc *ahc) { struct scb *scbp; int opri;; opri = splbio(); if ((scbp = SLIST_FIRST(&ahc->scb_data->free_scbs))) { SLIST_REMOVE_HEAD(&ahc->scb_data->free_scbs, links); } else { ahcallocscbs(ahc); scbp = SLIST_FIRST(&ahc->scb_data->free_scbs); if (scbp != NULL) SLIST_REMOVE_HEAD(&ahc->scb_data->free_scbs, links); } splx(opri); #ifdef AHC_DEBUG if (ahc_debug & AHC_SHOWSCBALLOC) { if (scbp != NULL) printf("%s: new SCB, tag %x\n", ahc_name(ahc), scbp->hscb->tag); else printf("%s: failed to allocate new SCB\n", ahc_name(ahc)); } #endif return (scbp); } static int ahc_createdmamem(tag, size, flags, mapp, vaddr, baddr, seg, nseg, myname, what) bus_dma_tag_t tag; int size; int flags; bus_dmamap_t *mapp; caddr_t *vaddr; bus_addr_t *baddr; bus_dma_segment_t *seg; int *nseg; const char *myname, *what; { int error, level = 0; if ((error = bus_dmamem_alloc(tag, size, NBPG, 0, seg, 1, nseg, BUS_DMA_NOWAIT)) != 0) { printf("%s: failed to allocate DMA mem for %s, error = %d\n", myname, what, error); goto out; } level++; if ((error = bus_dmamem_map(tag, seg, *nseg, size, vaddr, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { printf("%s: failed to map DMA mem for %s, error = %d\n", myname, what, error); goto out; } level++; if ((error = bus_dmamap_create(tag, size, 1, size, 0, BUS_DMA_NOWAIT | flags, mapp)) != 0) { printf("%s: failed to create DMA map for %s, error = %d\n", myname, what, error); goto out; } level++; if ((error = bus_dmamap_load(tag, *mapp, *vaddr, size, NULL, BUS_DMA_NOWAIT)) != 0) { printf("%s: failed to load DMA map for %s, error = %d\n", myname, what, error); goto out; } *baddr = (*mapp)->dm_segs[0].ds_addr; #ifdef AHC_DEBUG printf("%s: dmamem for %s at busaddr %lx virt %lx nseg %d size %d\n", myname, what, (unsigned long)*baddr, (unsigned long)*vaddr, *nseg, size); #endif return 0; out: switch (level) { case 3: bus_dmamap_destroy(tag, *mapp); /* FALLTHROUGH */ case 2: bus_dmamem_unmap(tag, *vaddr, size); /* FALLTHROUGH */ case 1: bus_dmamem_free(tag, seg, *nseg); break; default: break; } return error; } static void ahc_freedmamem(tag, size, map, vaddr, seg, nseg) bus_dma_tag_t tag; int size; bus_dmamap_t map; caddr_t vaddr; bus_dma_segment_t *seg; int nseg; { bus_dmamap_unload(tag, map); bus_dmamap_destroy(tag, map); bus_dmamem_unmap(tag, vaddr, size); bus_dmamem_free(tag, seg, nseg); } char * ahc_name(struct ahc_softc *ahc) { return (ahc->sc_dev.dv_xname); } #ifdef AHC_DEBUG static void ahc_print_scb(struct scb *scb) { struct hardware_scb *hscb = scb->hscb; printf("scb:%p tag %x control:0x%x tcl:0x%x cmdlen:%d cmdpointer:0x%lx\n", scb, hscb->tag, hscb->control, hscb->tcl, hscb->cmdlen, (unsigned long)le32toh(hscb->cmdpointer)); printf(" datlen:%u data:0x%lx segs:0x%x segp:0x%lx\n", le32toh(hscb->datalen), (unsigned long)(le32toh(hscb->data)), hscb->SG_count, (unsigned long)(le32toh(hscb->SG_pointer))); printf(" sg_addr:%lx sg_len:%lu\n", (unsigned long)(le32toh(scb->sg_list[0].addr)), (unsigned long)(le32toh(scb->sg_list[0].len)); printf(" cdb:%x %x %x %x %x %x %x %x %x %x %x %x\n", hscb->cmdstore[0], hscb->cmdstore[1], hscb->cmdstore[2], hscb->cmdstore[3], hscb->cmdstore[4], hscb->cmdstore[5], hscb->cmdstore[6], hscb->cmdstore[7], hscb->cmdstore[8], hscb->cmdstore[9], hscb->cmdstore[10], hscb->cmdstore[11]); } #endif static struct { u_int8_t errno; char *errmesg; } hard_error[] = { { ILLHADDR, "Illegal Host Access" }, { ILLSADDR, "Illegal Sequencer Address referrenced" }, { ILLOPCODE, "Illegal Opcode in sequencer program" }, { SQPARERR, "Sequencer Parity Error" }, { DPARERR, "Data-path Parity Error" }, { MPARERR, "Scratch or SCB Memory Parity Error" }, { PCIERRSTAT, "PCI Error detected" }, { CIOPARERR, "CIOBUS Parity Error" }, }; static const int num_errors = sizeof(hard_error)/sizeof(hard_error[0]); static struct { u_int8_t phase; u_int8_t mesg_out; /* Message response to parity errors */ char *phasemsg; } phase_table[] = { { P_DATAOUT, MSG_NOOP, "in Data-out phase" }, { P_DATAIN, MSG_INITIATOR_DET_ERR, "in Data-in phase" }, { P_COMMAND, MSG_NOOP, "in Command phase" }, { P_MESGOUT, MSG_NOOP, "in Message-out phase" }, { P_STATUS, MSG_INITIATOR_DET_ERR, "in Status phase" }, { P_MESGIN, MSG_PARITY_ERROR, "in Message-in phase" }, { P_BUSFREE, MSG_NOOP, "while idle" }, { 0, MSG_NOOP, "in unknown phase" } }; static const int num_phases = (sizeof(phase_table)/sizeof(phase_table[0])) - 1; /* * Valid SCSIRATE values. (p. 3-17) * Provides a mapping of tranfer periods in ns to the proper value to * stick in the scsiscfr reg to use that transfer rate. */ #define AHC_SYNCRATE_DT 0 #define AHC_SYNCRATE_ULTRA2 1 #define AHC_SYNCRATE_ULTRA 3 #define AHC_SYNCRATE_FAST 6 static struct ahc_syncrate ahc_syncrates[] = { /* ultra2 fast/ultra period rate */ { 0x42, 0x000, 9, "80.0" }, { 0x03, 0x000, 10, "40.0" }, { 0x04, 0x000, 11, "33.0" }, { 0x05, 0x100, 12, "20.0" }, { 0x06, 0x110, 15, "16.0" }, { 0x07, 0x120, 18, "13.4" }, { 0x08, 0x000, 25, "10.0" }, { 0x19, 0x010, 31, "8.0" }, { 0x1a, 0x020, 37, "6.67" }, { 0x1b, 0x030, 43, "5.7" }, { 0x1c, 0x040, 50, "5.0" }, { 0x00, 0x050, 56, "4.4" }, { 0x00, 0x060, 62, "4.0" }, { 0x00, 0x070, 68, "3.6" }, { 0x00, 0x000, 0, NULL } }; /* * Allocate a controller structure for a new device and initialize it. */ int ahc_alloc(struct ahc_softc *ahc, bus_space_handle_t sh, bus_space_tag_t st, bus_dma_tag_t parent_dmat, ahc_chip chip, ahc_feature features, ahc_flag flags) { struct scb_data *scb_data; scb_data = malloc(sizeof (struct scb_data), M_DEVBUF, M_NOWAIT); if (scb_data == NULL) { printf("%s: cannot malloc softc!\n", ahc_name(ahc)); return -1; } bzero(scb_data, sizeof (struct scb_data)); LIST_INIT(&ahc->pending_ccbs); ahc->tag = st; ahc->bsh = sh; ahc->parent_dmat = parent_dmat; ahc->chip = chip; ahc->features = features; ahc->flags = flags; ahc->scb_data = scb_data; ahc->unpause = (ahc_inb(ahc, HCNTRL) & IRQMS) | INTEN; /* The IRQMS bit is only valid on VL and EISA chips */ if ((ahc->chip & AHC_PCI) != 0) ahc->unpause &= ~IRQMS; ahc->pause = ahc->unpause | PAUSE; return (0); } void ahc_free(ahc) struct ahc_softc *ahc; { ahcfiniscbdata(ahc); if (ahc->init_level != 0) ahc_freedmamem(ahc->parent_dmat, ahc->shared_data_size, ahc->shared_data_dmamap, ahc->qoutfifo, &ahc->shared_data_seg, ahc->shared_data_nseg); if (ahc->scb_data != NULL) free(ahc->scb_data, M_DEVBUF); if (ahc->bus_data != NULL) free(ahc->bus_data, M_DEVBUF); return; } static int ahcinitscbdata(struct ahc_softc *ahc) { struct scb_data *scb_data; int i; scb_data = ahc->scb_data; SLIST_INIT(&scb_data->free_scbs); SLIST_INIT(&scb_data->sg_maps); /* Allocate SCB resources */ scb_data->scbarray = (struct scb *)malloc(sizeof(struct scb) * AHC_SCB_MAX, M_DEVBUF, M_NOWAIT); if (scb_data->scbarray == NULL) return (ENOMEM); bzero(scb_data->scbarray, sizeof(struct scb) * AHC_SCB_MAX); /* Determine the number of hardware SCBs and initialize them */ scb_data->maxhscbs = ahc_probe_scbs(ahc); /* SCB 0 heads the free list */ ahc_outb(ahc, FREE_SCBH, 0); for (i = 0; i < ahc->scb_data->maxhscbs; i++) { ahc_outb(ahc, SCBPTR, i); /* Clear the control byte. */ ahc_outb(ahc, SCB_CONTROL, 0); /* Set the next pointer */ ahc_outb(ahc, SCB_NEXT, i+1); /* Make the tag number invalid */ ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL); } /* Make sure that the last SCB terminates the free list */ ahc_outb(ahc, SCBPTR, i-1); ahc_outb(ahc, SCB_NEXT, SCB_LIST_NULL); /* Ensure we clear the 0 SCB's control byte. */ ahc_outb(ahc, SCBPTR, 0); ahc_outb(ahc, SCB_CONTROL, 0); scb_data->maxhscbs = i; if (ahc->scb_data->maxhscbs == 0) panic("%s: No SCB space found", ahc_name(ahc)); /* * Create our DMA tags. These tags define the kinds of device * accessable memory allocations and memory mappings we will * need to perform during normal operation. * * Unless we need to further restrict the allocation, we rely * on the restrictions of the parent dmat, hence the common * use of MAXADDR and MAXSIZE. */ if (ahc_createdmamem(ahc->parent_dmat, AHC_SCB_MAX * sizeof(struct hardware_scb), ahc->sc_dmaflags, &scb_data->hscb_dmamap, (caddr_t *)&scb_data->hscbs, &scb_data->hscb_busaddr, &scb_data->hscb_seg, &scb_data->hscb_nseg, ahc_name(ahc), "hardware SCB structures") < 0) goto error_exit; scb_data->init_level++; if (ahc_createdmamem(ahc->parent_dmat, AHC_SCB_MAX * sizeof(struct scsipi_sense_data), ahc->sc_dmaflags, &scb_data->sense_dmamap, (caddr_t *)&scb_data->sense, &scb_data->sense_busaddr, &scb_data->sense_seg, &scb_data->sense_nseg, ahc_name(ahc), "sense buffers") < 0) goto error_exit; scb_data->init_level++; /* Perform initial CCB allocation */ bzero(scb_data->hscbs, AHC_SCB_MAX * sizeof(struct hardware_scb)); ahcallocscbs(ahc); if (scb_data->numscbs == 0) { printf("%s: ahc_init_scb_data - " "Unable to allocate initial scbs\n", ahc_name(ahc)); goto error_exit; } scb_data->init_level++; /* * Note that we were successfull */ return 0; error_exit: return ENOMEM; } static void ahcfiniscbdata(struct ahc_softc *ahc) { struct scb_data *scb_data; scb_data = ahc->scb_data; switch (scb_data->init_level) { default: case 3: { struct sg_map_node *sg_map; while ((sg_map = SLIST_FIRST(&scb_data->sg_maps))!= NULL) { SLIST_REMOVE_HEAD(&scb_data->sg_maps, links); ahc_freedmamem(ahc->parent_dmat, PAGE_SIZE, sg_map->sg_dmamap, (caddr_t)sg_map->sg_vaddr, &sg_map->sg_dmasegs, sg_map->sg_nseg); free(sg_map, M_DEVBUF); } } /*FALLTHROUGH*/ case 2: ahc_freedmamem(ahc->parent_dmat, AHC_SCB_MAX * sizeof(struct scsipi_sense_data), scb_data->sense_dmamap, (caddr_t)scb_data->sense, &scb_data->sense_seg, scb_data->sense_nseg); /*FALLTHROUGH*/ case 1: ahc_freedmamem(ahc->parent_dmat, AHC_SCB_MAX * sizeof(struct hardware_scb), scb_data->hscb_dmamap, (caddr_t)scb_data->hscbs, &scb_data->hscb_seg, scb_data->hscb_nseg); /*FALLTHROUGH*/ } if (scb_data->scbarray != NULL) free(scb_data->scbarray, M_DEVBUF); } int ahc_reset(struct ahc_softc *ahc) { u_int sblkctl; int wait; #ifdef AHC_DUMP_SEQ if (ahc->init_level == 0) ahc_dumpseq(ahc); #endif ahc_outb(ahc, HCNTRL, CHIPRST | ahc->pause); /* * Ensure that the reset has finished */ wait = 1000; do { DELAY(1000); } while (--wait && !(ahc_inb(ahc, HCNTRL) & CHIPRSTACK)); if (wait == 0) { printf("%s: WARNING - Failed chip reset! " "Trying to initialize anyway.\n", ahc_name(ahc)); } ahc_outb(ahc, HCNTRL, ahc->pause); /* Determine channel configuration */ sblkctl = ahc_inb(ahc, SBLKCTL) & (SELBUSB|SELWIDE); /* No Twin Channel PCI cards */ if ((ahc->chip & AHC_PCI) != 0) sblkctl &= ~SELBUSB; switch (sblkctl) { case 0: /* Single Narrow Channel */ break; case 2: /* Wide Channel */ ahc->features |= AHC_WIDE; break; case 8: /* Twin Channel */ ahc->features |= AHC_TWIN; break; default: printf(" Unsupported adapter type. Ignoring\n"); return(-1); } return (0); } /* * Called when we have an active connection to a target on the bus, * this function finds the nearest syncrate to the input period limited * by the capabilities of the bus connectivity of the target. */ static struct ahc_syncrate * ahc_devlimited_syncrate(struct ahc_softc *ahc, u_int *period) { u_int maxsync; if ((ahc->features & AHC_ULTRA2) != 0) { if ((ahc_inb(ahc, SBLKCTL) & ENAB40) != 0 && (ahc_inb(ahc, SSTAT2) & EXP_ACTIVE) == 0) { maxsync = AHC_SYNCRATE_ULTRA2; } else { maxsync = AHC_SYNCRATE_ULTRA; } } else if ((ahc->features & AHC_ULTRA) != 0) { maxsync = AHC_SYNCRATE_ULTRA; } else { maxsync = AHC_SYNCRATE_FAST; } return (ahc_find_syncrate(ahc, period, maxsync)); } /* * Look up the valid period to SCSIRATE conversion in our table. * Return the period and offset that should be sent to the target * if this was the beginning of an SDTR. */ static struct ahc_syncrate * ahc_find_syncrate(struct ahc_softc *ahc, u_int *period, u_int maxsync) { struct ahc_syncrate *syncrate; syncrate = &ahc_syncrates[maxsync]; while ((syncrate->rate != NULL) && ((ahc->features & AHC_ULTRA2) == 0 || (syncrate->sxfr_u2 != 0))) { if (*period <= syncrate->period) { /* * When responding to a target that requests * sync, the requested rate may fall between * two rates that we can output, but still be * a rate that we can receive. Because of this, * we want to respond to the target with * the same rate that it sent to us even * if the period we use to send data to it * is lower. Only lower the response period * if we must. */ if (syncrate == &ahc_syncrates[maxsync]) *period = syncrate->period; break; } syncrate++; } if ((*period == 0) || (syncrate->rate == NULL) || ((ahc->features & AHC_ULTRA2) != 0 && (syncrate->sxfr_u2 == 0))) { /* Use asynchronous transfers. */ *period = 0; syncrate = NULL; } return (syncrate); } static u_int ahc_find_period(struct ahc_softc *ahc, u_int scsirate, u_int maxsync) { struct ahc_syncrate *syncrate; if ((ahc->features & AHC_ULTRA2) != 0) scsirate &= SXFR_ULTRA2; else scsirate &= SXFR; syncrate = &ahc_syncrates[maxsync]; while (syncrate->rate != NULL) { if ((ahc->features & AHC_ULTRA2) != 0) { if (syncrate->sxfr_u2 == 0) break; else if (scsirate == (syncrate->sxfr_u2 & SXFR_ULTRA2)) return (syncrate->period); } else if (scsirate == (syncrate->sxfr & SXFR)) { return (syncrate->period); } syncrate++; } return (0); /* async */ } static void ahc_validate_offset(struct ahc_softc *ahc, struct ahc_syncrate *syncrate, u_int *offset, int wide) { u_int maxoffset; /* Limit offset to what we can do */ if (syncrate == NULL) { maxoffset = 0; } else if ((ahc->features & AHC_ULTRA2) != 0) { maxoffset = MAX_OFFSET_ULTRA2; } else { if (wide) maxoffset = MAX_OFFSET_16BIT; else maxoffset = MAX_OFFSET_8BIT; } *offset = MIN(*offset, maxoffset); } static void ahc_update_target_msg_request(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, struct ahc_initiator_tinfo *tinfo, int force, int paused) { u_int targ_msg_req_orig; targ_msg_req_orig = ahc->targ_msg_req; if (tinfo->current.period != tinfo->goal.period || tinfo->current.width != tinfo->goal.width || tinfo->current.offset != tinfo->goal.offset || (force && (tinfo->goal.period != 0 || tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT))) { ahc->targ_msg_req |= devinfo->target_mask; } else { ahc->targ_msg_req &= ~devinfo->target_mask; } if (ahc->targ_msg_req != targ_msg_req_orig) { /* Update the message request bit for this target */ if ((ahc->features & AHC_HS_MAILBOX) != 0) { if (paused) { ahc_outb(ahc, TARGET_MSG_REQUEST, ahc->targ_msg_req & 0xFF); ahc_outb(ahc, TARGET_MSG_REQUEST + 1, (ahc->targ_msg_req >> 8) & 0xFF); } else { ahc_outb(ahc, HS_MAILBOX, 0x01 << HOST_MAILBOX_SHIFT); } } else { if (!paused) pause_sequencer(ahc); ahc_outb(ahc, TARGET_MSG_REQUEST, ahc->targ_msg_req & 0xFF); ahc_outb(ahc, TARGET_MSG_REQUEST + 1, (ahc->targ_msg_req >> 8) & 0xFF); if (!paused) unpause_sequencer(ahc); } } } static void ahc_set_syncrate(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, struct ahc_syncrate *syncrate, u_int period, u_int offset, u_int type, int paused, int done) { struct ahc_initiator_tinfo *tinfo; struct tmode_tstate *tstate; u_int old_period; u_int old_offset; int active = (type & AHC_TRANS_ACTIVE) == AHC_TRANS_ACTIVE; if (syncrate == NULL) { period = 0; offset = 0; } tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, devinfo->target, &tstate); old_period = tinfo->current.period; old_offset = tinfo->current.offset; if ((type & AHC_TRANS_CUR) != 0 && (old_period != period || old_offset != offset)) { u_int scsirate; scsirate = tinfo->scsirate; if ((ahc->features & AHC_ULTRA2) != 0) { /* XXX */ /* Force single edge until DT is fully implemented */ scsirate &= ~(SXFR_ULTRA2|SINGLE_EDGE|ENABLE_CRC); if (syncrate != NULL) scsirate |= syncrate->sxfr_u2|SINGLE_EDGE; if (active) ahc_outb(ahc, SCSIOFFSET, offset); } else { scsirate &= ~(SXFR|SOFS); /* * Ensure Ultra mode is set properly for * this target. */ tstate->ultraenb &= ~devinfo->target_mask; if (syncrate != NULL) { if (syncrate->sxfr & ULTRA_SXFR) { tstate->ultraenb |= devinfo->target_mask; } scsirate |= syncrate->sxfr & SXFR; scsirate |= offset & SOFS; } if (active) { u_int sxfrctl0; sxfrctl0 = ahc_inb(ahc, SXFRCTL0); sxfrctl0 &= ~FAST20; if (tstate->ultraenb & devinfo->target_mask) sxfrctl0 |= FAST20; ahc_outb(ahc, SXFRCTL0, sxfrctl0); } } if (active) ahc_outb(ahc, SCSIRATE, scsirate); tinfo->scsirate = scsirate; tinfo->current.period = period; tinfo->current.offset = offset; /* Update the syncrates in any pending scbs */ ahc_update_pending_syncrates(ahc); } /* * Print messages if we're verbose and at the end of a negotiation * cycle. */ if (done) { if (offset != 0) { printf("%s: target %d synchronous at %sMHz, " "offset = 0x%x\n", ahc_name(ahc), devinfo->target, syncrate->rate, offset); } else { printf("%s: target %d using " "asynchronous transfers\n", ahc_name(ahc), devinfo->target); } } if ((type & AHC_TRANS_GOAL) != 0) { tinfo->goal.period = period; tinfo->goal.offset = offset; } if ((type & AHC_TRANS_USER) != 0) { tinfo->user.period = period; tinfo->user.offset = offset; } ahc_update_target_msg_request(ahc, devinfo, tinfo, /*force*/FALSE, paused); } static void ahc_set_width(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, u_int width, u_int type, int paused, int done) { struct ahc_initiator_tinfo *tinfo; struct tmode_tstate *tstate; u_int oldwidth; int active = (type & AHC_TRANS_ACTIVE) == AHC_TRANS_ACTIVE; tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, devinfo->target, &tstate); oldwidth = tinfo->current.width; if ((type & AHC_TRANS_CUR) != 0 && oldwidth != width) { u_int scsirate; scsirate = tinfo->scsirate; scsirate &= ~WIDEXFER; if (width == MSG_EXT_WDTR_BUS_16_BIT) scsirate |= WIDEXFER; tinfo->scsirate = scsirate; if (active) ahc_outb(ahc, SCSIRATE, scsirate); tinfo->current.width = width; } if (done) { printf("%s: target %d using %dbit transfers\n", ahc_name(ahc), devinfo->target, 8 * (0x01 << width)); } if ((type & AHC_TRANS_GOAL) != 0) tinfo->goal.width = width; if ((type & AHC_TRANS_USER) != 0) tinfo->user.width = width; ahc_update_target_msg_request(ahc, devinfo, tinfo, /*force*/FALSE, paused); } static void ahc_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, int enable) { struct ahc_initiator_tinfo *tinfo; struct tmode_tstate *tstate; tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, devinfo->target, &tstate); if (enable) tstate->tagenable |= devinfo->target_mask; else tstate->tagenable &= ~devinfo->target_mask; } /* * Attach all the sub-devices we can find */ int ahc_attach(struct ahc_softc *ahc) { TAILQ_INIT(&ahc->sc_q); ahc->sc_adapter.scsipi_cmd = ahc_action; ahc->sc_adapter.scsipi_minphys = ahcminphys; ahc->sc_link.type = BUS_SCSI; ahc->sc_link.scsipi_scsi.adapter_target = ahc->our_id; ahc->sc_link.scsipi_scsi.channel = 0; ahc->sc_link.scsipi_scsi.max_target = (ahc->features & AHC_WIDE) ? 15 : 7; ahc->sc_link.scsipi_scsi.max_lun = 7; ahc->sc_link.adapter_softc = ahc; ahc->sc_link.adapter = &ahc->sc_adapter; ahc->sc_link.openings = 2; ahc->sc_link.device = &ahc_dev; if (ahc->features & AHC_TWIN) { ahc->sc_link_b = ahc->sc_link; ahc->sc_link_b.scsipi_scsi.adapter_target = ahc->our_id_b; ahc->sc_link_b.scsipi_scsi.channel = 1; } if ((ahc->flags & AHC_CHANNEL_B_PRIMARY) == 0) { ahc->sc_link_b.scsipi_scsi.scsibus = 0xff; config_found((void *)ahc, &ahc->sc_link, scsiprint); if (ahc->features & AHC_TWIN) config_found((void *)ahc, &ahc->sc_link_b, scsiprint); } else { config_found((void *)ahc, &ahc->sc_link_b, scsiprint); config_found((void *)ahc, &ahc->sc_link, scsiprint); } return 1; } static void ahc_fetch_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) { u_int saved_tcl; role_t role; int our_id; if (ahc_inb(ahc, SSTAT0) & TARGET) role = ROLE_TARGET; else role = ROLE_INITIATOR; if (role == ROLE_TARGET && (ahc->features & AHC_MULTI_TID) != 0 && (ahc_inb(ahc, SEQ_FLAGS) & CMDPHASE_PENDING) != 0) { /* We were selected, so pull our id from TARGIDIN */ our_id = ahc_inb(ahc, TARGIDIN) & OID; } else if ((ahc->features & AHC_ULTRA2) != 0) our_id = ahc_inb(ahc, SCSIID_ULTRA2) & OID; else our_id = ahc_inb(ahc, SCSIID) & OID; saved_tcl = ahc_inb(ahc, SAVED_TCL); ahc_compile_devinfo(devinfo, our_id, TCL_TARGET(saved_tcl), TCL_LUN(saved_tcl), TCL_CHANNEL(ahc, saved_tcl), role); } static void ahc_compile_devinfo(struct ahc_devinfo *devinfo, u_int our_id, u_int target, u_int lun, char channel, role_t role) { devinfo->our_scsiid = our_id; devinfo->target = target; devinfo->lun = lun; devinfo->target_offset = target; devinfo->channel = channel; devinfo->role = role; if (channel == 'B') devinfo->target_offset += 8; devinfo->target_mask = (0x01 << devinfo->target_offset); } /* * Catch an interrupt from the adapter */ int ahc_intr(void *arg) { struct ahc_softc *ahc; u_int intstat; ahc = (struct ahc_softc *)arg; intstat = ahc_inb(ahc, INTSTAT); /* * Any interrupts to process? */ if ((intstat & INT_PEND) == 0) { if (ahc->bus_intr && ahc->bus_intr(ahc)) { #ifdef AHC_DEBUG printf("%s: bus intr: CCHADDR %x HADDR %x SEQADDR %x\n", ahc_name(ahc), ahc_inb(ahc, CCHADDR) | (ahc_inb(ahc, CCHADDR+1) << 8) | (ahc_inb(ahc, CCHADDR+2) << 16) | (ahc_inb(ahc, CCHADDR+3) << 24), ahc_inb(ahc, HADDR) | (ahc_inb(ahc, HADDR+1) << 8) | (ahc_inb(ahc, HADDR+2) << 16) | (ahc_inb(ahc, HADDR+3) << 24), ahc_inb(ahc, SEQADDR0) | (ahc_inb(ahc, SEQADDR1) << 8)); #endif return 1; } return 0; } #ifdef AHC_DEBUG if (ahc_debug & AHC_SHOWINTR) { printf("%s: intstat %x\n", ahc_name(ahc), intstat); } #endif if (intstat & CMDCMPLT) { ahc_outb(ahc, CLRINT, CLRCMDINT); ahc_run_qoutfifo(ahc); } if (intstat & BRKADRINT) { /* * We upset the sequencer :-( * Lookup the error message */ int i, error, num_errors; error = ahc_inb(ahc, ERROR); num_errors = sizeof(hard_error)/sizeof(hard_error[0]); for (i = 0; error != 1 && i < num_errors; i++) error >>= 1; panic("%s: brkadrint, %s at seqaddr = 0x%x\n", ahc_name(ahc), hard_error[i].errmesg, ahc_inb(ahc, SEQADDR0) | (ahc_inb(ahc, SEQADDR1) << 8)); /* Tell everyone that this HBA is no longer availible */ ahc_abort_scbs(ahc, AHC_TARGET_WILDCARD, ALL_CHANNELS, AHC_LUN_WILDCARD, SCB_LIST_NULL, ROLE_UNKNOWN, XS_DRIVER_STUFFUP); } if (intstat & SEQINT) ahc_handle_seqint(ahc, intstat); if (intstat & SCSIINT) ahc_handle_scsiint(ahc, intstat); return 1; } static struct tmode_tstate * ahc_alloc_tstate(struct ahc_softc *ahc, u_int scsi_id, char channel) { struct tmode_tstate *master_tstate; struct tmode_tstate *tstate; int i, s; master_tstate = ahc->enabled_targets[ahc->our_id]; if (channel == 'B') { scsi_id += 8; master_tstate = ahc->enabled_targets[ahc->our_id_b + 8]; } if (ahc->enabled_targets[scsi_id] != NULL && ahc->enabled_targets[scsi_id] != master_tstate) panic("%s: ahc_alloc_tstate - Target already allocated", ahc_name(ahc)); tstate = malloc(sizeof(*tstate), M_DEVBUF, M_NOWAIT); if (tstate == NULL) return (NULL); /* * If we have allocated a master tstate, copy user settings from * the master tstate (taken from SRAM or the EEPROM) for this * channel, but reset our current and goal settings to async/narrow * until an initiator talks to us. */ if (master_tstate != NULL) { bcopy(master_tstate, tstate, sizeof(*tstate)); tstate->ultraenb = 0; for (i = 0; i < 16; i++) { bzero(&tstate->transinfo[i].current, sizeof(tstate->transinfo[i].current)); bzero(&tstate->transinfo[i].goal, sizeof(tstate->transinfo[i].goal)); } } else bzero(tstate, sizeof(*tstate)); s = splbio(); ahc->enabled_targets[scsi_id] = tstate; splx(s); return (tstate); } #if UNUSED static void ahc_free_tstate(struct ahc_softc *ahc, u_int scsi_id, char channel, int force) { struct tmode_tstate *tstate; /* Don't clean up the entry for our initiator role */ if ((ahc->flags & AHC_INITIATORMODE) != 0 && ((channel == 'B' && scsi_id == ahc->our_id_b) || (channel == 'A' && scsi_id == ahc->our_id)) && force == FALSE) return; if (channel == 'B') scsi_id += 8; tstate = ahc->enabled_targets[scsi_id]; if (tstate != NULL) free(tstate, M_DEVBUF); ahc->enabled_targets[scsi_id] = NULL; } #endif static void ahc_handle_seqint(struct ahc_softc *ahc, u_int intstat) { struct scb *scb; struct ahc_devinfo devinfo; ahc_fetch_devinfo(ahc, &devinfo); /* * Clear the upper byte that holds SEQINT status * codes and clear the SEQINT bit. We will unpause * the sequencer, if appropriate, after servicing * the request. */ ahc_outb(ahc, CLRINT, CLRSEQINT); switch (intstat & SEQINT_MASK) { case NO_MATCH: { /* Ensure we don't leave the selection hardware on */ ahc_outb(ahc, SCSISEQ, ahc_inb(ahc, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP)); printf("%s:%c:%d: no active SCB for reconnecting " "target - issuing BUS DEVICE RESET\n", ahc_name(ahc), devinfo.channel, devinfo.target); printf("SAVED_TCL == 0x%x, ARG_1 == 0x%x, SEQ_FLAGS == 0x%x\n", ahc_inb(ahc, SAVED_TCL), ahc_inb(ahc, ARG_1), ahc_inb(ahc, SEQ_FLAGS)); ahc->msgout_buf[0] = MSG_BUS_DEV_RESET; ahc->msgout_len = 1; ahc->msgout_index = 0; ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT; ahc_outb(ahc, MSG_OUT, HOST_MSG); ahc_outb(ahc, SCSISIGO, ahc_inb(ahc, LASTPHASE) | ATNO); break; } case UPDATE_TMSG_REQ: ahc_outb(ahc, TARGET_MSG_REQUEST, ahc->targ_msg_req & 0xFF); ahc_outb(ahc, TARGET_MSG_REQUEST + 1, (ahc->targ_msg_req >> 8) & 0xFF); ahc_outb(ahc, HS_MAILBOX, 0); break; case SEND_REJECT: { u_int rejbyte = ahc_inb(ahc, ACCUM); printf("%s:%c:%d: Warning - unknown message received from " "target (0x%x). Rejecting\n", ahc_name(ahc), devinfo.channel, devinfo.target, rejbyte); break; } case NO_IDENT: { /* * The reconnecting target either did not send an identify * message, or did, but we didn't find and SCB to match and * before it could respond to our ATN/abort, it hit a dataphase. * The only safe thing to do is to blow it away with a bus * reset. */ int found; printf("%s:%c:%d: Target did not send an IDENTIFY message. " "LASTPHASE = 0x%x, SAVED_TCL == 0x%x\n", ahc_name(ahc), devinfo.channel, devinfo.target, ahc_inb(ahc, LASTPHASE), ahc_inb(ahc, SAVED_TCL)); found = ahc_reset_channel(ahc, devinfo.channel, /*initiate reset*/TRUE); printf("%s: Issued Channel %c Bus Reset. " "%d SCBs aborted\n", ahc_name(ahc), devinfo.channel, found); return; } case BAD_PHASE: { u_int lastphase; lastphase = ahc_inb(ahc, LASTPHASE); if (lastphase == P_BUSFREE) { printf("%s:%c:%d: Missed busfree. Curphase = 0x%x\n", ahc_name(ahc), devinfo.channel, devinfo.target, ahc_inb(ahc, SCSISIGI)); restart_sequencer(ahc); return; } else { printf("%s:%c:%d: unknown scsi bus phase %x. " "Attempting to continue\n", ahc_name(ahc), devinfo.channel, devinfo.target, ahc_inb(ahc, SCSISIGI)); } break; } case BAD_STATUS: { u_int scb_index; struct hardware_scb *hscb; struct scsipi_xfer *xs; /* * The sequencer will notify us when a command * has an error that would be of interest to * the kernel. This allows us to leave the sequencer * running in the common case of command completes * without error. The sequencer will already have * dma'd the SCB back up to us, so we can reference * the in kernel copy directly. */ scb_index = ahc_inb(ahc, SCB_TAG); scb = &ahc->scb_data->scbarray[scb_index]; /* ahc_print_scb(scb); */ /* * Set the default return value to 0 (don't * send sense). The sense code will change * this if needed. */ ahc_outb(ahc, RETURN_1, 0); if (!(scb_index < ahc->scb_data->numscbs && (scb->flags & SCB_ACTIVE) != 0)) { printf("%s:%c:%d: ahc_intr - referenced scb " "not valid during seqint 0x%x scb(%d)\n", ahc_name(ahc), devinfo.channel, devinfo.target, intstat, scb_index); goto unpause; } hscb = scb->hscb; xs = scb->xs; /* Don't want to clobber the original sense code */ if ((scb->flags & SCB_SENSE) != 0) { /* * Clear the SCB_SENSE Flag and have * the sequencer do a normal command * complete. */ scb->flags &= ~SCB_SENSE; ahcsetccbstatus(xs, XS_DRIVER_STUFFUP); break; } /* Freeze the queue unit the client sees the error. */ ahc_freeze_devq(ahc, xs->sc_link); ahc_freeze_ccb(scb); xs->status = hscb->status; switch (hscb->status) { case SCSI_STATUS_OK: printf("%s: Interrupted for status of 0???\n", ahc_name(ahc)); break; case SCSI_STATUS_CMD_TERMINATED: case SCSI_STATUS_CHECK_COND: #if defined(AHC_DEBUG) if (ahc_debug & AHC_SHOWSENSE) { scsi_print_addr(xs->sc_link); printf("Check Status, resid %d datalen %d\n", xs->resid, xs->datalen); } #endif if (xs->error == XS_NOERROR && !(scb->flags & SCB_SENSE)) { struct ahc_dma_seg *sg; struct scsipi_sense *sc; struct ahc_initiator_tinfo *tinfo; struct tmode_tstate *tstate; sg = scb->sg_list; sc = (struct scsipi_sense *)(&hscb->cmdstore); /* * Save off the residual if there is one. */ if (hscb->residual_SG_count != 0) ahc_calc_residual(scb); else xs->resid = 0; #ifdef AHC_DEBUG if (ahc_debug & AHC_SHOWSENSE) { scsi_print_addr(xs->sc_link); printf("Sending Sense\n"); } #endif sg->addr = ahc->scb_data->sense_busaddr + (hscb->tag*sizeof(struct scsipi_sense_data)); sg->len = sizeof (struct scsipi_sense_data); sc->opcode = REQUEST_SENSE; sc->byte2 = SCB_LUN(scb) << 5; sc->unused[0] = 0; sc->unused[1] = 0; sc->length = sg->len; sc->control = 0; /* * Would be nice to preserve DISCENB here, * but due to the way we page SCBs, we can't. */ hscb->control = 0; /* * This request sense could be because the * the device lost power or in some other * way has lost our transfer negotiations. * Renegotiate if appropriate. Unit attention * errors will be reported before any data * phases occur. */ ahc_calc_residual(scb); #if defined(AHC_DEBUG) if (ahc_debug & AHC_SHOWSENSE) { scsi_print_addr(xs->sc_link); printf("Sense: datalen %d resid %d" "chan %d id %d targ %d\n", xs->datalen, xs->resid, devinfo.channel, devinfo.our_scsiid, devinfo.target); } #endif if (xs->datalen > 0 && xs->resid == xs->datalen) { tinfo = ahc_fetch_transinfo(ahc, devinfo.channel, devinfo.our_scsiid, devinfo.target, &tstate); ahc_update_target_msg_request(ahc, &devinfo, tinfo, /*force*/TRUE, /*paused*/TRUE); } hscb->status = 0; hscb->SG_count = 1; hscb->SG_pointer = scb->sg_list_phys; hscb->data = sg->addr; hscb->datalen = sg->len; hscb->cmdpointer = hscb->cmdstore_busaddr; hscb->cmdlen = sizeof(*sc); scb->sg_count = hscb->SG_count; ahc_swap_hscb(hscb); ahc_swap_sg(scb->sg_list); scb->flags |= SCB_SENSE; /* * Ensure the target is busy since this * will be an untagged request. */ ahc_busy_tcl(ahc, scb); ahc_outb(ahc, RETURN_1, SEND_SENSE); /* * Ensure we have enough time to actually * retrieve the sense. */ if (!(scb->xs->xs_control & XS_CTL_POLL)) { callout_reset(&scb->xs->xs_callout, 5 * hz, ahc_timeout, scb); } } break; case SCSI_STATUS_BUSY: case SCSI_STATUS_QUEUE_FULL: /* * Requeue any transactions that haven't been * sent yet. */ ahc_freeze_devq(ahc, xs->sc_link); ahc_freeze_ccb(scb); break; } break; } case TRACE_POINT: { printf("SSTAT2 = 0x%x DFCNTRL = 0x%x\n", ahc_inb(ahc, SSTAT2), ahc_inb(ahc, DFCNTRL)); printf("SSTAT3 = 0x%x DSTATUS = 0x%x\n", ahc_inb(ahc, SSTAT3), ahc_inb(ahc, DFSTATUS)); printf("SSTAT0 = 0x%x, SCB_DATACNT = 0x%x\n", ahc_inb(ahc, SSTAT0), ahc_inb(ahc, SCB_DATACNT)); break; } case HOST_MSG_LOOP: { /* * The sequencer has encountered a message phase * that requires host assistance for completion. * While handling the message phase(s), we will be * notified by the sequencer after each byte is * transfered so we can track bus phases. * * If this is the first time we've seen a HOST_MSG_LOOP, * initialize the state of the host message loop. */ if (ahc->msg_type == MSG_TYPE_NONE) { u_int bus_phase; bus_phase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; if (bus_phase != P_MESGIN && bus_phase != P_MESGOUT) { printf("ahc_intr: HOST_MSG_LOOP bad " "phase 0x%x\n", bus_phase); /* * Probably transitioned to bus free before * we got here. Just punt the message. */ ahc_clear_intstat(ahc); restart_sequencer(ahc); } if (devinfo.role == ROLE_INITIATOR) { struct scb *scb; u_int scb_index; scb_index = ahc_inb(ahc, SCB_TAG); scb = &ahc->scb_data->scbarray[scb_index]; if (bus_phase == P_MESGOUT) ahc_setup_initiator_msgout(ahc, &devinfo, scb); else { ahc->msg_type = MSG_TYPE_INITIATOR_MSGIN; ahc->msgin_index = 0; } } else { if (bus_phase == P_MESGOUT) { ahc->msg_type = MSG_TYPE_TARGET_MSGOUT; ahc->msgin_index = 0; } else /* XXX Ever executed??? */ ahc_setup_target_msgin(ahc, &devinfo); } } /* Pass a NULL path so that handlers generate their own */ ahc_handle_message_phase(ahc, /*path*/NULL); break; } case PERR_DETECTED: { /* * If we've cleared the parity error interrupt * but the sequencer still believes that SCSIPERR * is true, it must be that the parity error is * for the currently presented byte on the bus, * and we are not in a phase (data-in) where we will * eventually ack this byte. Ack the byte and * throw it away in the hope that the target will * take us to message out to deliver the appropriate * error message. */ if ((intstat & SCSIINT) == 0 && (ahc_inb(ahc, SSTAT1) & SCSIPERR) != 0) { u_int curphase; /* * The hardware will only let you ack bytes * if the expected phase in SCSISIGO matches * the current phase. Make sure this is * currently the case. */ curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; ahc_outb(ahc, LASTPHASE, curphase); ahc_outb(ahc, SCSISIGO, curphase); ahc_inb(ahc, SCSIDATL); } break; } case DATA_OVERRUN: { /* * When the sequencer detects an overrun, it * places the controller in "BITBUCKET" mode * and allows the target to complete its transfer. * Unfortunately, none of the counters get updated * when the controller is in this mode, so we have * no way of knowing how large the overrun was. */ u_int scbindex = ahc_inb(ahc, SCB_TAG); u_int lastphase = ahc_inb(ahc, LASTPHASE); int i; scb = &ahc->scb_data->scbarray[scbindex]; for (i = 0; i < num_phases; i++) { if (lastphase == phase_table[i].phase) break; } scsi_print_addr(scb->xs->sc_link); printf("data overrun detected %s." " Tag == 0x%x.\n", phase_table[i].phasemsg, scb->hscb->tag); scsi_print_addr(scb->xs->sc_link); printf("%s seen Data Phase. Length = %d. NumSGs = %d.\n", ahc_inb(ahc, SEQ_FLAGS) & DPHASE ? "Have" : "Haven't", scb->xs->datalen, scb->sg_count); if (scb->sg_count > 0) { for (i = 0; i < scb->sg_count; i++) { printf("sg[%d] - Addr 0x%x : Length %d\n", i, le32toh(scb->sg_list[i].addr), le32toh(scb->sg_list[i].len)); } } /* * Set this and it will take affect when the * target does a command complete. */ ahc_freeze_devq(ahc, scb->xs->sc_link); ahcsetccbstatus(scb->xs, XS_DRIVER_STUFFUP); ahc_freeze_ccb(scb); break; } case TRACEPOINT: { printf("TRACEPOINT: RETURN_1 = %d\n", ahc_inb(ahc, RETURN_1)); printf("TRACEPOINT: RETURN_2 = %d\n", ahc_inb(ahc, RETURN_2)); printf("TRACEPOINT: ARG_1 = %d\n", ahc_inb(ahc, ARG_1)); printf("TRACEPOINT: ARG_2 = %d\n", ahc_inb(ahc, ARG_2)); printf("TRACEPOINT: CCHADDR = %x\n", ahc_inb(ahc, CCHADDR) | (ahc_inb(ahc, CCHADDR+1) << 8) | (ahc_inb(ahc, CCHADDR+2) << 16) | (ahc_inb(ahc, CCHADDR+3) << 24)); #if 0 printf("SSTAT1 == 0x%x\n", ahc_inb(ahc, SSTAT1)); printf("SSTAT0 == 0x%x\n", ahc_inb(ahc, SSTAT0)); printf(", SCSISIGI == 0x%x\n", ahc_inb(ahc, SCSISIGI)); printf("TRACEPOINT: CCHCNT = %d, SG_COUNT = %d\n", ahc_inb(ahc, CCHCNT), ahc_inb(ahc, SG_COUNT)); printf("TRACEPOINT: SCB_TAG = %d\n", ahc_inb(ahc, SCB_TAG)); printf("TRACEPOINT1: CCHADDR = %d, CCHCNT = %d, SCBPTR = %d\n", ahc_inb(ahc, CCHADDR) | (ahc_inb(ahc, CCHADDR+1) << 8) | (ahc_inb(ahc, CCHADDR+2) << 16) | (ahc_inb(ahc, CCHADDR+3) << 24), ahc_inb(ahc, CCHCNT) | (ahc_inb(ahc, CCHCNT+1) << 8) | (ahc_inb(ahc, CCHCNT+2) << 16), ahc_inb(ahc, SCBPTR)); printf("TRACEPOINT: WAITING_SCBH = %d\n", ahc_inb(ahc, WAITING_SCBH)); printf("TRACEPOINT: SCB_TAG = %d\n", ahc_inb(ahc, SCB_TAG)); #if DDB > 0 cpu_Debugger(); #endif #endif break; } #if NOT_YET /* XXX Fill these in later */ case MESG_BUFFER_BUSY: break; case MSGIN_PHASEMIS: break; #endif default: printf("ahc_intr: seqint, " "intstat == 0x%x, scsisigi = 0x%x\n", intstat, ahc_inb(ahc, SCSISIGI)); break; } unpause: /* * The sequencer is paused immediately on * a SEQINT, so we should restart it when * we're done. */ unpause_sequencer(ahc); } static void ahc_handle_scsiint(struct ahc_softc *ahc, u_int intstat) { u_int scb_index; u_int status; struct scb *scb; char cur_channel; char intr_channel; if ((ahc->features & AHC_TWIN) != 0 && ((ahc_inb(ahc, SBLKCTL) & SELBUSB) != 0)) cur_channel = 'B'; else cur_channel = 'A'; intr_channel = cur_channel; status = ahc_inb(ahc, SSTAT1); if (status == 0) { if ((ahc->features & AHC_TWIN) != 0) { /* Try the other channel */ ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) ^ SELBUSB); status = ahc_inb(ahc, SSTAT1); ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) ^ SELBUSB); intr_channel = (cur_channel == 'A') ? 'B' : 'A'; } if (status == 0) { printf("%s: Spurious SCSI interrupt\n", ahc_name(ahc)); return; } } scb_index = ahc_inb(ahc, SCB_TAG); if (scb_index < ahc->scb_data->numscbs) { scb = &ahc->scb_data->scbarray[scb_index]; if ((scb->flags & SCB_ACTIVE) == 0 || (ahc_inb(ahc, SEQ_FLAGS) & IDENTIFY_SEEN) == 0) scb = NULL; } else scb = NULL; if ((status & SCSIRSTI) != 0) { printf("%s: Someone reset channel %c\n", ahc_name(ahc), intr_channel); ahc_reset_channel(ahc, intr_channel, /* Initiate Reset */FALSE); } else if ((status & SCSIPERR) != 0) { /* * Determine the bus phase and queue an appropriate message. * SCSIPERR is latched true as soon as a parity error * occurs. If the sequencer acked the transfer that * caused the parity error and the currently presented * transfer on the bus has correct parity, SCSIPERR will * be cleared by CLRSCSIPERR. Use this to determine if * we should look at the last phase the sequencer recorded, * or the current phase presented on the bus. */ u_int mesg_out; u_int curphase; u_int errorphase; u_int lastphase; int i; lastphase = ahc_inb(ahc, LASTPHASE); curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; ahc_outb(ahc, CLRSINT1, CLRSCSIPERR); /* * For all phases save DATA, the sequencer won't * automatically ack a byte that has a parity error * in it. So the only way that the current phase * could be 'data-in' is if the parity error is for * an already acked byte in the data phase. During * synchronous data-in transfers, we may actually * ack bytes before latching the current phase in * LASTPHASE, leading to the discrepancy between * curphase and lastphase. */ if ((ahc_inb(ahc, SSTAT1) & SCSIPERR) != 0 || curphase == P_DATAIN) errorphase = curphase; else errorphase = lastphase; for (i = 0; i < num_phases; i++) { if (errorphase == phase_table[i].phase) break; } mesg_out = phase_table[i].mesg_out; if (scb != NULL) scsi_print_addr(scb->xs->sc_link); else printf("%s:%c:%d: ", ahc_name(ahc), intr_channel, TCL_TARGET(ahc_inb(ahc, SAVED_TCL))); printf("parity error detected %s. " "SEQADDR(0x%x) SCSIRATE(0x%x)\n", phase_table[i].phasemsg, ahc_inb(ahc, SEQADDR0) | (ahc_inb(ahc, SEQADDR1) << 8), ahc_inb(ahc, SCSIRATE)); /* * We've set the hardware to assert ATN if we * get a parity error on "in" phases, so all we * need to do is stuff the message buffer with * the appropriate message. "In" phases have set * mesg_out to something other than MSG_NOP. */ if (mesg_out != MSG_NOOP) { if (ahc->msg_type != MSG_TYPE_NONE) ahc->send_msg_perror = TRUE; else ahc_outb(ahc, MSG_OUT, mesg_out); } ahc_outb(ahc, CLRINT, CLRSCSIINT); unpause_sequencer(ahc); } else if ((status & BUSFREE) != 0 && (ahc_inb(ahc, SIMODE1) & ENBUSFREE) != 0) { /* * First look at what phase we were last in. * If its message out, chances are pretty good * that the busfree was in response to one of * our abort requests. */ u_int lastphase = ahc_inb(ahc, LASTPHASE); u_int saved_tcl = ahc_inb(ahc, SAVED_TCL); u_int target = TCL_TARGET(saved_tcl); u_int initiator_role_id = TCL_SCSI_ID(ahc, saved_tcl); char channel = TCL_CHANNEL(ahc, saved_tcl); int printerror = 1; ahc_outb(ahc, SCSISEQ, ahc_inb(ahc, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP)); if (lastphase == P_MESGOUT) { u_int message; u_int tag; message = ahc->msgout_buf[ahc->msgout_index - 1]; tag = SCB_LIST_NULL; switch (message) { case MSG_ABORT_TAG: tag = scb->hscb->tag; /* FALLTRHOUGH */ case MSG_ABORT: scsi_print_addr(scb->xs->sc_link); printf("SCB %x - Abort %s Completed.\n", scb->hscb->tag, tag == SCB_LIST_NULL ? "" : "Tag"); ahc_abort_scbs(ahc, target, channel, TCL_LUN(saved_tcl), tag, ROLE_INITIATOR, XS_DRIVER_STUFFUP); printerror = 0; break; case MSG_BUS_DEV_RESET: { struct ahc_devinfo devinfo; if (scb != NULL && (scb->xs->xs_control & XS_CTL_RESET) && ahc_match_scb(scb, target, channel, TCL_LUN(saved_tcl), SCB_LIST_NULL, ROLE_INITIATOR)) { ahcsetccbstatus(scb->xs, XS_NOERROR); } ahc_compile_devinfo(&devinfo, initiator_role_id, target, TCL_LUN(saved_tcl), channel, ROLE_INITIATOR); ahc_handle_devreset(ahc, &devinfo, XS_RESET, "Bus Device Reset", /*verbose_level*/0); printerror = 0; break; } default: break; } } if (printerror != 0) { int i; if (scb != NULL) { u_int tag; if ((scb->hscb->control & TAG_ENB) != 0) tag = scb->hscb->tag; else tag = SCB_LIST_NULL; ahc_abort_scbs(ahc, target, channel, SCB_LUN(scb), tag, ROLE_INITIATOR, XS_DRIVER_STUFFUP); scsi_print_addr(scb->xs->sc_link); } else { /* * We had not fully identified this connection, * so we cannot abort anything. */ printf("%s: ", ahc_name(ahc)); } for (i = 0; i < num_phases; i++) { if (lastphase == phase_table[i].phase) break; } printf("Unexpected busfree %s\n" "SEQADDR == 0x%x\n", phase_table[i].phasemsg, ahc_inb(ahc, SEQADDR0) | (ahc_inb(ahc, SEQADDR1) << 8)); } ahc_clear_msg_state(ahc); ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE); ahc_outb(ahc, CLRSINT1, CLRBUSFREE|CLRSCSIPERR); ahc_outb(ahc, CLRINT, CLRSCSIINT); restart_sequencer(ahc); } else if ((status & SELTO) != 0) { u_int scbptr; scbptr = ahc_inb(ahc, WAITING_SCBH); ahc_outb(ahc, SCBPTR, scbptr); scb_index = ahc_inb(ahc, SCB_TAG); if (scb_index < ahc->scb_data->numscbs) { scb = &ahc->scb_data->scbarray[scb_index]; if ((scb->flags & SCB_ACTIVE) == 0) scb = NULL; } else scb = NULL; if (scb == NULL) { printf("%s: ahc_intr - referenced scb not " "valid during SELTO scb(%d, %d)\n", ahc_name(ahc), scbptr, scb_index); } else { u_int tag; tag = SCB_LIST_NULL; if ((scb->hscb->control & MSG_SIMPLE_Q_TAG) != 0) tag = scb->hscb->tag; ahc_abort_scbs(ahc, SCB_TARGET(scb), SCB_CHANNEL(scb), SCB_LUN(scb), tag, ROLE_INITIATOR, XS_SELTIMEOUT); } /* Stop the selection */ ahc_outb(ahc, SCSISEQ, 0); /* No more pending messages */ ahc_clear_msg_state(ahc); /* * Although the driver does not care about the * 'Selection in Progress' status bit, the busy * LED does. SELINGO is only cleared by a sucessful * selection, so we must manually clear it to ensure * the LED turns off just incase no future successful * selections occur (e.g. no devices on the bus). */ ahc_outb(ahc, CLRSINT0, CLRSELINGO); /* Clear interrupt state */ ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRBUSFREE|CLRSCSIPERR); ahc_outb(ahc, CLRINT, CLRSCSIINT); restart_sequencer(ahc); } else { scsi_print_addr(scb->xs->sc_link); printf("Unknown SCSIINT. Status = 0x%x\n", status); ahc_outb(ahc, CLRSINT1, status); ahc_outb(ahc, CLRINT, CLRSCSIINT); unpause_sequencer(ahc); } } static void ahc_build_transfer_msg(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) { /* * We need to initiate transfer negotiations. * If our current and goal settings are identical, * we want to renegotiate due to a check condition. */ struct ahc_initiator_tinfo *tinfo; struct tmode_tstate *tstate; int dowide; int dosync; tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, devinfo->target, &tstate); dowide = tinfo->current.width != tinfo->goal.width; dosync = tinfo->current.period != tinfo->goal.period; if (!dowide && !dosync) { dowide = tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT; dosync = tinfo->goal.period != 0; } if (dowide) { ahc_construct_wdtr(ahc, tinfo->goal.width); } else if (dosync) { struct ahc_syncrate *rate; u_int period; u_int offset; period = tinfo->goal.period; rate = ahc_devlimited_syncrate(ahc, &period); offset = tinfo->goal.offset; ahc_validate_offset(ahc, rate, &offset, tinfo->current.width); ahc_construct_sdtr(ahc, period, offset); } else { panic("ahc_intr: AWAITING_MSG for negotiation, " "but no negotiation needed\n"); } } static void ahc_setup_initiator_msgout(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, struct scb *scb) { /* * To facilitate adding multiple messages together, * each routine should increment the index and len * variables instead of setting them explicitly. */ ahc->msgout_index = 0; ahc->msgout_len = 0; if ((scb->flags & SCB_DEVICE_RESET) == 0 && ahc_inb(ahc, MSG_OUT) == MSG_IDENTIFYFLAG) { u_int identify_msg; identify_msg = MSG_IDENTIFYFLAG | SCB_LUN(scb); if ((scb->hscb->control & DISCENB) != 0) identify_msg |= MSG_IDENTIFY_DISCFLAG; ahc->msgout_buf[ahc->msgout_index++] = identify_msg; ahc->msgout_len++; if ((scb->hscb->control & TAG_ENB) != 0) { /* XXX fvdl FreeBSD has tag action passed down */ ahc->msgout_buf[ahc->msgout_index++] = MSG_SIMPLE_Q_TAG; ahc->msgout_buf[ahc->msgout_index++] = scb->hscb->tag; ahc->msgout_len += 2; } } if (scb->flags & SCB_DEVICE_RESET) { ahc->msgout_buf[ahc->msgout_index++] = MSG_BUS_DEV_RESET; ahc->msgout_len++; scsi_print_addr(scb->xs->sc_link); printf("Bus Device Reset Message Sent\n"); } else if (scb->flags & SCB_ABORT) { if ((scb->hscb->control & TAG_ENB) != 0) ahc->msgout_buf[ahc->msgout_index++] = MSG_ABORT_TAG; else ahc->msgout_buf[ahc->msgout_index++] = MSG_ABORT; ahc->msgout_len++; scsi_print_addr(scb->xs->sc_link); printf("Abort Message Sent\n"); } else if ((ahc->targ_msg_req & devinfo->target_mask) != 0) { ahc_build_transfer_msg(ahc, devinfo); } else { printf("ahc_intr: AWAITING_MSG for an SCB that " "does not have a waiting message"); panic("SCB = %d, SCB Control = %x, MSG_OUT = %x " "SCB flags = %x", scb->hscb->tag, scb->hscb->control, ahc_inb(ahc, MSG_OUT), scb->flags); } /* * Clear the MK_MESSAGE flag from the SCB so we aren't * asked to send this message again. */ ahc_outb(ahc, SCB_CONTROL, ahc_inb(ahc, SCB_CONTROL) & ~MK_MESSAGE); ahc->msgout_index = 0; ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT; } static void ahc_setup_target_msgin(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) { /* * To facilitate adding multiple messages together, * each routine should increment the index and len * variables instead of setting them explicitly. */ ahc->msgout_index = 0; ahc->msgout_len = 0; if ((ahc->targ_msg_req & devinfo->target_mask) != 0) ahc_build_transfer_msg(ahc, devinfo); else panic("ahc_intr: AWAITING target message with no message"); ahc->msgout_index = 0; ahc->msg_type = MSG_TYPE_TARGET_MSGIN; } static int ahc_handle_msg_reject(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) { /* * What we care about here is if we had an * outstanding SDTR or WDTR message for this * target. If we did, this is a signal that * the target is refusing negotiation. */ struct scb *scb; u_int scb_index; u_int last_msg; int response = 0; scb_index = ahc_inb(ahc, SCB_TAG); scb = &ahc->scb_data->scbarray[scb_index]; /* Might be necessary */ last_msg = ahc_inb(ahc, LAST_MSG); if (ahc_sent_msg(ahc, MSG_EXT_WDTR, /*full*/FALSE)) { struct ahc_initiator_tinfo *tinfo; struct tmode_tstate *tstate; #ifdef AHC_DEBUG_NEG /* note 8bit xfers */ printf("%s:%c:%d: refuses WIDE negotiation. Using " "8bit transfers\n", ahc_name(ahc), devinfo->channel, devinfo->target); #endif ahc_set_width(ahc, devinfo, MSG_EXT_WDTR_BUS_8_BIT, AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, /*paused*/TRUE, /*done*/TRUE); /* * No need to clear the sync rate. If the target * did not accept the command, our syncrate is * unaffected. If the target started the negotiation, * but rejected our response, we already cleared the * sync rate before sending our WDTR. */ tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, devinfo->target, &tstate); if (tinfo->goal.period) { u_int period; /* Start the sync negotiation */ period = tinfo->goal.period; ahc_devlimited_syncrate(ahc, &period); ahc->msgout_index = 0; ahc->msgout_len = 0; ahc_construct_sdtr(ahc, period, tinfo->goal.offset); ahc->msgout_index = 0; response = 1; } } else if (ahc_sent_msg(ahc, MSG_EXT_SDTR, /*full*/FALSE)) { /* note asynch xfers and clear flag */ ahc_set_syncrate(ahc, devinfo, /*syncrate*/NULL, /*period*/0, /*offset*/0, AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, /*paused*/TRUE, /*done*/TRUE); #ifdef AHC_DEBUG_NEG printf("%s:%c:%d: refuses synchronous negotiation. " "Using asynchronous transfers\n", ahc_name(ahc), devinfo->channel, devinfo->target); #endif } else if ((scb->hscb->control & MSG_SIMPLE_Q_TAG) != 0) { printf("%s:%c:%d: refuses tagged commands. Performing " "non-tagged I/O\n", ahc_name(ahc), devinfo->channel, devinfo->target); ahc_set_tags(ahc, devinfo, FALSE); /* * Resend the identify for this CCB as the target * may believe that the selection is invalid otherwise. */ ahc_outb(ahc, SCB_CONTROL, ahc_inb(ahc, SCB_CONTROL) & ~MSG_SIMPLE_Q_TAG); scb->hscb->control &= ~MSG_SIMPLE_Q_TAG; ahc_outb(ahc, MSG_OUT, MSG_IDENTIFYFLAG); ahc_outb(ahc, SCSISIGO, ahc_inb(ahc, SCSISIGO) | ATNO); /* * Requeue all tagged commands for this target * currently in our posession so they can be * converted to untagged commands. */ ahc_search_qinfifo(ahc, SCB_TARGET(scb), SCB_CHANNEL(scb), SCB_LUN(scb), /*tag*/SCB_LIST_NULL, ROLE_INITIATOR, SCB_REQUEUE, SEARCH_COMPLETE); } else { /* * Otherwise, we ignore it. */ printf("%s:%c:%d: Message reject for %x -- ignored\n", ahc_name(ahc), devinfo->channel, devinfo->target, last_msg); } return (response); } static void ahc_clear_msg_state(struct ahc_softc *ahc) { ahc->msgout_len = 0; ahc->msgin_index = 0; ahc->msg_type = MSG_TYPE_NONE; ahc_outb(ahc, MSG_OUT, MSG_NOOP); } static void ahc_handle_message_phase(struct ahc_softc *ahc, struct scsipi_link *sc_link) { struct ahc_devinfo devinfo; u_int bus_phase; int end_session; ahc_fetch_devinfo(ahc, &devinfo); end_session = FALSE; bus_phase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; reswitch: switch (ahc->msg_type) { case MSG_TYPE_INITIATOR_MSGOUT: { int lastbyte; int phasemis; int msgdone; if (ahc->msgout_len == 0) panic("REQINIT interrupt with no active message"); phasemis = bus_phase != P_MESGOUT; if (phasemis) { if (bus_phase == P_MESGIN) { /* * Change gears and see if * this messages is of interest to * us or should be passed back to * the sequencer. */ ahc_outb(ahc, CLRSINT1, CLRATNO); ahc->send_msg_perror = FALSE; ahc->msg_type = MSG_TYPE_INITIATOR_MSGIN; ahc->msgin_index = 0; goto reswitch; } end_session = TRUE; break; } if (ahc->send_msg_perror) { ahc_outb(ahc, CLRSINT1, CLRATNO); ahc_outb(ahc, CLRSINT1, CLRREQINIT); ahc_outb(ahc, SCSIDATL, MSG_PARITY_ERROR); break; } msgdone = ahc->msgout_index == ahc->msgout_len; if (msgdone) { /* * The target has requested a retry. * Re-assert ATN, reset our message index to * 0, and try again. */ ahc->msgout_index = 0; ahc_outb(ahc, SCSISIGO, ahc_inb(ahc, SCSISIGO) | ATNO); } lastbyte = ahc->msgout_index == (ahc->msgout_len - 1); if (lastbyte) { /* Last byte is signified by dropping ATN */ ahc_outb(ahc, CLRSINT1, CLRATNO); } /* * Clear our interrupt status and present * the next byte on the bus. */ ahc_outb(ahc, CLRSINT1, CLRREQINIT); ahc_outb(ahc, SCSIDATL, ahc->msgout_buf[ahc->msgout_index++]); break; } case MSG_TYPE_INITIATOR_MSGIN: { int phasemis; int message_done; phasemis = bus_phase != P_MESGIN; if (phasemis) { ahc->msgin_index = 0; if (bus_phase == P_MESGOUT && (ahc->send_msg_perror == TRUE || (ahc->msgout_len != 0 && ahc->msgout_index == 0))) { ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT; goto reswitch; } end_session = TRUE; break; } /* Pull the byte in without acking it */ ahc->msgin_buf[ahc->msgin_index] = ahc_inb(ahc, SCSIBUSL); message_done = ahc_parse_msg(ahc, sc_link, &devinfo); if (message_done) { /* * Clear our incoming message buffer in case there * is another message following this one. */ ahc->msgin_index = 0; /* * If this message illicited a response, * assert ATN so the target takes us to the * message out phase. */ if (ahc->msgout_len != 0) ahc_outb(ahc, SCSISIGO, ahc_inb(ahc, SCSISIGO) | ATNO); } else ahc->msgin_index++; /* Ack the byte */ ahc_outb(ahc, CLRSINT1, CLRREQINIT); ahc_inb(ahc, SCSIDATL); break; } case MSG_TYPE_TARGET_MSGIN: { int msgdone; int msgout_request; if (ahc->msgout_len == 0) panic("Target MSGIN with no active message"); /* * If we interrupted a mesgout session, the initiator * will not know this until our first REQ. So, we * only honor mesgout requests after we've sent our * first byte. */ if ((ahc_inb(ahc, SCSISIGI) & ATNI) != 0 && ahc->msgout_index > 0) msgout_request = TRUE; else msgout_request = FALSE; if (msgout_request) { /* * Change gears and see if * this messages is of interest to * us or should be passed back to * the sequencer. */ ahc->msg_type = MSG_TYPE_TARGET_MSGOUT; ahc_outb(ahc, SCSISIGO, P_MESGOUT | BSYO); ahc->msgin_index = 0; /* Dummy read to REQ for first byte */ ahc_inb(ahc, SCSIDATL); ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) | SPIOEN); break; } msgdone = ahc->msgout_index == ahc->msgout_len; if (msgdone) { ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) & ~SPIOEN); end_session = TRUE; break; } /* * Present the next byte on the bus. */ ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) | SPIOEN); ahc_outb(ahc, SCSIDATL, ahc->msgout_buf[ahc->msgout_index++]); break; } case MSG_TYPE_TARGET_MSGOUT: { int lastbyte; int msgdone; /* * The initiator signals that this is * the last byte by dropping ATN. */ lastbyte = (ahc_inb(ahc, SCSISIGI) & ATNI) == 0; /* * Read the latched byte, but turn off SPIOEN first * so that we don't inadvertantly cause a REQ for the * next byte. */ ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) & ~SPIOEN); ahc->msgin_buf[ahc->msgin_index] = ahc_inb(ahc, SCSIDATL); msgdone = ahc_parse_msg(ahc, sc_link, &devinfo); if (msgdone == MSGLOOP_TERMINATED) { /* * The message is *really* done in that it caused * us to go to bus free. The sequencer has already * been reset at this point, so pull the ejection * handle. */ return; } ahc->msgin_index++; /* * XXX Read spec about initiator dropping ATN too soon * and use msgdone to detect it. */ if (msgdone == MSGLOOP_MSGCOMPLETE) { ahc->msgin_index = 0; /* * If this message illicited a response, transition * to the Message in phase and send it. */ if (ahc->msgout_len != 0) { ahc_outb(ahc, SCSISIGO, P_MESGIN | BSYO); ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) | SPIOEN); ahc->msg_type = MSG_TYPE_TARGET_MSGIN; ahc->msgin_index = 0; break; } } if (lastbyte) end_session = TRUE; else { /* Ask for the next byte. */ ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) | SPIOEN); } break; } default: panic("Unknown REQINIT message type"); } if (end_session) { ahc_clear_msg_state(ahc); ahc_outb(ahc, RETURN_1, EXIT_MSG_LOOP); } else ahc_outb(ahc, RETURN_1, CONT_MSG_LOOP); } /* * See if we sent a particular extended message to the target. * If "full" is true, the target saw the full message. * If "full" is false, the target saw at least the first * byte of the message. */ static int ahc_sent_msg(struct ahc_softc *ahc, u_int msgtype, int full) { int found; int index; found = FALSE; index = 0; while (index < ahc->msgout_len) { if (ahc->msgout_buf[index] == MSG_EXTENDED) { /* Found a candidate */ if (ahc->msgout_buf[index+2] == msgtype) { u_int end_index; end_index = index + 1 + ahc->msgout_buf[index + 1]; if (full) { if (ahc->msgout_index > end_index) found = TRUE; } else if (ahc->msgout_index > index) found = TRUE; } break; } else if (ahc->msgout_buf[index] >= MSG_SIMPLE_Q_TAG && ahc->msgout_buf[index] <= MSG_IGN_WIDE_RESIDUE) { /* Skip tag type and tag id or residue param*/ index += 2; } else { /* Single byte message */ index++; } } return (found); } static int ahc_parse_msg(struct ahc_softc *ahc, struct scsipi_link *sc_link, struct ahc_devinfo *devinfo) { struct ahc_initiator_tinfo *tinfo; struct tmode_tstate *tstate; int reject; int done; int response; u_int targ_scsirate; done = MSGLOOP_IN_PROG; response = FALSE; reject = FALSE; tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, devinfo->target, &tstate); targ_scsirate = tinfo->scsirate; /* * Parse as much of the message as is availible, * rejecting it if we don't support it. When * the entire message is availible and has been * handled, return MSGLOOP_MSGCOMPLETE, indicating * that we have parsed an entire message. * * In the case of extended messages, we accept the length * byte outright and perform more checking once we know the * extended message type. */ switch (ahc->msgin_buf[0]) { case MSG_MESSAGE_REJECT: response = ahc_handle_msg_reject(ahc, devinfo); /* FALLTHROUGH */ case MSG_NOOP: done = MSGLOOP_MSGCOMPLETE; break; case MSG_IGN_WIDE_RESIDUE: { /* Wait for the whole message */ if (ahc->msgin_index >= 1) { if (ahc->msgin_buf[1] != 1 || tinfo->current.width == MSG_EXT_WDTR_BUS_8_BIT) { reject = TRUE; done = MSGLOOP_MSGCOMPLETE; } else ahc_handle_ign_wide_residue(ahc, devinfo); } break; } case MSG_EXTENDED: { /* Wait for enough of the message to begin validation */ if (ahc->msgin_index < 2) break; switch (ahc->msgin_buf[2]) { case MSG_EXT_SDTR: { struct ahc_syncrate *syncrate; u_int period; u_int offset; u_int saved_offset; if (ahc->msgin_buf[1] != MSG_EXT_SDTR_LEN) { reject = TRUE; break; } /* * Wait until we have both args before validating * and acting on this message. * * Add one to MSG_EXT_SDTR_LEN to account for * the extended message preamble. */ if (ahc->msgin_index < (MSG_EXT_SDTR_LEN + 1)) break; period = ahc->msgin_buf[3]; saved_offset = offset = ahc->msgin_buf[4]; syncrate = ahc_devlimited_syncrate(ahc, &period); ahc_validate_offset(ahc, syncrate, &offset, targ_scsirate & WIDEXFER); ahc_set_syncrate(ahc, devinfo, syncrate, period, offset, AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, /*paused*/TRUE, /*done*/TRUE); /* * See if we initiated Sync Negotiation * and didn't have to fall down to async * transfers. */ if (ahc_sent_msg(ahc, MSG_EXT_SDTR, /*full*/TRUE)) { /* We started it */ if (saved_offset != offset) { /* Went too low - force async */ reject = TRUE; } } else { /* * Send our own SDTR in reply */ ahc->msgout_index = 0; ahc->msgout_len = 0; ahc_construct_sdtr(ahc, period, offset); ahc->msgout_index = 0; response = TRUE; } done = MSGLOOP_MSGCOMPLETE; break; } case MSG_EXT_WDTR: { u_int bus_width; u_int sending_reply; sending_reply = FALSE; if (ahc->msgin_buf[1] != MSG_EXT_WDTR_LEN) { reject = TRUE; break; } /* * Wait until we have our arg before validating * and acting on this message. * * Add one to MSG_EXT_WDTR_LEN to account for * the extended message preamble. */ if (ahc->msgin_index < (MSG_EXT_WDTR_LEN + 1)) break; bus_width = ahc->msgin_buf[3]; if (ahc_sent_msg(ahc, MSG_EXT_WDTR, /*full*/TRUE)) { /* * Don't send a WDTR back to the * target, since we asked first. */ switch (bus_width){ default: /* * How can we do anything greater * than 16bit transfers on a 16bit * bus? */ reject = TRUE; printf("%s: target %d requested %dBit " "transfers. Rejecting...\n", ahc_name(ahc), devinfo->target, 8 * (0x01 << bus_width)); /* FALLTHROUGH */ case MSG_EXT_WDTR_BUS_8_BIT: bus_width = MSG_EXT_WDTR_BUS_8_BIT; break; case MSG_EXT_WDTR_BUS_16_BIT: break; } } else { /* * Send our own WDTR in reply */ switch (bus_width) { default: if (ahc->features & AHC_WIDE) { /* Respond Wide */ bus_width = MSG_EXT_WDTR_BUS_16_BIT; break; } /* FALLTHROUGH */ case MSG_EXT_WDTR_BUS_8_BIT: bus_width = MSG_EXT_WDTR_BUS_8_BIT; break; } ahc->msgout_index = 0; ahc->msgout_len = 0; ahc_construct_wdtr(ahc, bus_width); ahc->msgout_index = 0; response = TRUE; sending_reply = TRUE; } ahc_set_width(ahc, devinfo, bus_width, AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, /*paused*/TRUE, /*done*/TRUE); /* After a wide message, we are async */ ahc_set_syncrate(ahc, devinfo, /*syncrate*/NULL, /*period*/0, /*offset*/0, AHC_TRANS_ACTIVE, /*paused*/TRUE, /*done*/FALSE); if (sending_reply == FALSE && reject == FALSE) { if (tinfo->goal.period) { struct ahc_syncrate *rate; u_int period; u_int offset; /* Start the sync negotiation */ period = tinfo->goal.period; rate = ahc_devlimited_syncrate(ahc, &period); offset = tinfo->goal.offset; ahc_validate_offset(ahc, rate, &offset, tinfo->current.width); ahc->msgout_index = 0; ahc->msgout_len = 0; ahc_construct_sdtr(ahc, period, offset); ahc->msgout_index = 0; response = TRUE; } } done = MSGLOOP_MSGCOMPLETE; break; } default: /* Unknown extended message. Reject it. */ reject = TRUE; break; } break; } case MSG_BUS_DEV_RESET: ahc_handle_devreset(ahc, devinfo, XS_RESET, "Bus Device Reset Received", /*verbose_level*/0); restart_sequencer(ahc); done = MSGLOOP_TERMINATED; break; case MSG_ABORT_TAG: case MSG_ABORT: case MSG_CLEAR_QUEUE: /* Target mode messages */ if (devinfo->role != ROLE_TARGET) { reject = TRUE; break; } #if AHC_TARGET_MODE ahc_abort_scbs(ahc, devinfo->target, devinfo->channel, devinfo->lun, ahc->msgin_buf[0] == MSG_ABORT_TAG ? SCB_LIST_NULL : ahc_inb(ahc, INITIATOR_TAG), ROLE_TARGET, XS_DRIVER_STUFFUP); tstate = ahc->enabled_targets[devinfo->our_scsiid]; if (tstate != NULL) { struct tmode_lstate* lstate; lstate = tstate->enabled_luns[devinfo->lun]; if (lstate != NULL) { ahc_queue_lstate_event(ahc, lstate, devinfo->our_scsiid, ahc->msgin_buf[0], /*arg*/0); ahc_send_lstate_events(ahc, lstate); } } done = MSGLOOP_MSGCOMPLETE; #else panic("ahc: got target mode message"); #endif break; case MSG_TERM_IO_PROC: default: reject = TRUE; break; } if (reject) { /* * Setup to reject the message. */ ahc->msgout_index = 0; ahc->msgout_len = 1; ahc->msgout_buf[0] = MSG_MESSAGE_REJECT; done = MSGLOOP_MSGCOMPLETE; response = TRUE; } if (done != MSGLOOP_IN_PROG && !response) /* Clear the outgoing message buffer */ ahc->msgout_len = 0; return (done); } static void ahc_handle_ign_wide_residue(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) { u_int scb_index; struct scb *scb; scb_index = ahc_inb(ahc, SCB_TAG); scb = &ahc->scb_data->scbarray[scb_index]; if ((ahc_inb(ahc, SEQ_FLAGS) & DPHASE) == 0 || !(scb->xs->xs_control & XS_CTL_DATA_IN)) { /* * Ignore the message if we haven't * seen an appropriate data phase yet. */ } else { /* * If the residual occurred on the last * transfer and the transfer request was * expected to end on an odd count, do * nothing. Otherwise, subtract a byte * and update the residual count accordingly. */ u_int resid_sgcnt; resid_sgcnt = ahc_inb(ahc, SCB_RESID_SGCNT); if (resid_sgcnt == 0 && ahc_inb(ahc, DATA_COUNT_ODD) == 1) { /* * If the residual occurred on the last * transfer and the transfer request was * expected to end on an odd count, do * nothing. */ } else { u_int data_cnt; u_int32_t data_addr; u_int sg_index; data_cnt = (ahc_inb(ahc, SCB_RESID_DCNT + 2) << 16) | (ahc_inb(ahc, SCB_RESID_DCNT + 1) << 8) | (ahc_inb(ahc, SCB_RESID_DCNT)); data_addr = (ahc_inb(ahc, SHADDR + 3) << 24) | (ahc_inb(ahc, SHADDR + 2) << 16) | (ahc_inb(ahc, SHADDR + 1) << 8) | (ahc_inb(ahc, SHADDR)); data_cnt += 1; data_addr -= 1; sg_index = scb->sg_count - resid_sgcnt; if (sg_index != 0 && (le32toh(scb->sg_list[sg_index].len) < data_cnt)) { u_int32_t sg_addr; sg_index--; data_cnt = 1; data_addr = le32toh(scb->sg_list[sg_index].addr) + le32toh(scb->sg_list[sg_index].len) - 1; /* * The physical address base points to the * second entry as it is always used for * calculating the "next S/G pointer". */ sg_addr = scb->sg_list_phys + (sg_index* sizeof(*scb->sg_list)); ahc_outb(ahc, SG_NEXT + 3, sg_addr >> 24); ahc_outb(ahc, SG_NEXT + 2, sg_addr >> 16); ahc_outb(ahc, SG_NEXT + 1, sg_addr >> 8); ahc_outb(ahc, SG_NEXT, sg_addr); } ahc_outb(ahc, SCB_RESID_DCNT + 2, data_cnt >> 16); ahc_outb(ahc, SCB_RESID_DCNT + 1, data_cnt >> 8); ahc_outb(ahc, SCB_RESID_DCNT, data_cnt); ahc_outb(ahc, SHADDR + 3, data_addr >> 24); ahc_outb(ahc, SHADDR + 2, data_addr >> 16); ahc_outb(ahc, SHADDR + 1, data_addr >> 8); ahc_outb(ahc, SHADDR, data_addr); } } } static void ahc_handle_devreset(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, int status, char *message, int verbose_level) { int found; found = ahc_abort_scbs(ahc, devinfo->target, devinfo->channel, AHC_LUN_WILDCARD, SCB_LIST_NULL, devinfo->role, status); /* * Go back to async/narrow transfers and renegotiate. * ahc_set_width and ahc_set_syncrate can cope with NULL * paths. */ ahc_set_width(ahc, devinfo, MSG_EXT_WDTR_BUS_8_BIT, AHC_TRANS_CUR, /*paused*/TRUE, /*done*/FALSE); ahc_set_syncrate(ahc, devinfo, /*syncrate*/NULL, /*period*/0, /*offset*/0, AHC_TRANS_CUR, /*paused*/TRUE, /*done*/FALSE); if (message != NULL && (verbose_level <= 0)) printf("%s: %s on %c:%d. %d SCBs aborted\n", ahc_name(ahc), message, devinfo->channel, devinfo->target, found); } /* * We have an scb which has been processed by the * adaptor, now we look to see how the operation * went. */ static void ahc_done(struct ahc_softc *ahc, struct scb *scb) { struct scsipi_xfer *xs; struct scsipi_link *sc_link; int requeue = 0; int target; xs = scb->xs; sc_link = xs->sc_link; LIST_REMOVE(scb, plinks); callout_stop(&scb->xs->xs_callout); #ifdef AHC_DEBUG if (ahc_debug & AHC_SHOWCMDS) { scsi_print_addr(sc_link); printf("ahc_done opcode %d tag %x\n", xs->cmdstore.opcode, scb->hscb->tag); } #endif target = sc_link->scsipi_scsi.target; if (xs->datalen) { int op; if (xs->xs_control & XS_CTL_DATA_IN) op = BUS_DMASYNC_POSTREAD; else op = BUS_DMASYNC_POSTWRITE; bus_dmamap_sync(ahc->parent_dmat, scb->dmamap, 0, scb->dmamap->dm_mapsize, op); bus_dmamap_unload(ahc->parent_dmat, scb->dmamap); } /* * Unbusy this target/channel/lun. * XXX if we are holding two commands per lun, * send the next command. */ if (!(scb->hscb->control & TAG_ENB)) ahc_index_busy_tcl(ahc, scb->hscb->tcl, /*unbusy*/TRUE); /* * If the recovery SCB completes, we have to be * out of our timeout. */ if ((scb->flags & SCB_RECOVERY_SCB) != 0) { struct scb *scbp; /* * We were able to complete the command successfully, * so reinstate the timeouts for all other pending * commands. */ scbp = ahc->pending_ccbs.lh_first; while (scbp != NULL) { struct scsipi_xfer *txs = scbp->xs; if (!(txs->xs_control & XS_CTL_POLL)) { callout_reset(&scbp->xs->xs_callout, (scbp->xs->timeout * hz) / 1000, ahc_timeout, scbp); } scbp = LIST_NEXT(scbp, plinks); } /* * Ensure that we didn't put a second instance of this * SCB into the QINFIFO. */ ahc_search_qinfifo(ahc, SCB_TARGET(scb), SCB_CHANNEL(scb), SCB_LUN(scb), scb->hscb->tag, ROLE_INITIATOR, /*status*/0, SEARCH_REMOVE); if (xs->error != XS_NOERROR) ahcsetccbstatus(xs, XS_TIMEOUT); scsi_print_addr(xs->sc_link); printf("no longer in timeout, status = %x\n", xs->status); } if (xs->error != XS_NOERROR) { /* Don't clobber any existing error state */ } else if ((scb->flags & SCB_SENSE) != 0) { /* * We performed autosense retrieval. * * bzero the sense data before having * the drive fill it. The SCSI spec mandates * that any untransfered data should be * assumed to be zero. Complete the 'bounce' * of sense information through buffers accessible * via bus-space by copying it into the clients * csio. */ bzero(&xs->sense.scsi_sense, sizeof(xs->sense.scsi_sense)); bcopy(&ahc->scb_data->sense[scb->hscb->tag], &xs->sense.scsi_sense, le32toh(scb->sg_list->len)); xs->error = XS_SENSE; } if (scb->flags & SCB_FREEZE_QUEUE) { ahc->devqueue_blocked[target]--; scb->flags &= ~SCB_FREEZE_QUEUE; } requeue = scb->flags & SCB_REQUEUE; ahcfreescb(ahc, scb); if (requeue) { /* * Re-insert at the front of the private queue to * preserve order. */ int s; s = splbio(); TAILQ_INSERT_HEAD(&ahc->sc_q, xs, adapter_q); splx(s); } else { xs->xs_status |= XS_STS_DONE; ahc_check_tags(ahc, xs); scsipi_done(xs); } if ((xs = TAILQ_FIRST(&ahc->sc_q)) != NULL) ahc_action(xs); } /* * Determine the number of SCBs available on the controller */ int ahc_probe_scbs(struct ahc_softc *ahc) { int i; for (i = 0; i < AHC_SCB_MAX; i++) { ahc_outb(ahc, SCBPTR, i); ahc_outb(ahc, SCB_CONTROL, i); if (ahc_inb(ahc, SCB_CONTROL) != i) break; ahc_outb(ahc, SCBPTR, 0); if (ahc_inb(ahc, SCB_CONTROL) != 0) break; } return (i); } /* * Start the board, ready for normal operation */ int ahc_init(struct ahc_softc *ahc) { int max_targ = 15; int i; int term; u_int scsi_conf; u_int scsiseq_template; u_int ultraenb; u_int discenable; u_int tagenable; size_t driver_data_size; u_int32_t physaddr; #ifdef AHC_PRINT_SRAM printf("Scratch Ram:"); for (i = 0x20; i < 0x5f; i++) { if (((i % 8) == 0) && (i != 0)) { printf ("\n "); } printf (" 0x%x", ahc_inb(ahc, i)); } if ((ahc->features & AHC_MORE_SRAM) != 0) { for (i = 0x70; i < 0x7f; i++) { if (((i % 8) == 0) && (i != 0)) { printf ("\n "); } printf (" 0x%x", ahc_inb(ahc, i)); } } printf ("\n"); #endif /* * Assume we have a board at this stage and it has been reset. */ if ((ahc->flags & AHC_USEDEFAULTS) != 0) ahc->our_id = ahc->our_id_b = 7; /* * Default to allowing initiator operations. */ ahc->flags |= AHC_INITIATORMODE; /* * DMA tag for our command fifos and other data in system memory * the card's sequencer must be able to access. For initiator * roles, we need to allocate space for the qinfifo, qoutfifo, * and untagged_scb arrays each of which are composed of 256 * 1 byte elements. When providing for the target mode role, * we additionally must provide space for the incoming target * command fifo. */ driver_data_size = 3 * 256 * sizeof(u_int8_t); if (ahc_createdmamem(ahc->parent_dmat, driver_data_size, ahc->sc_dmaflags, &ahc->shared_data_dmamap, (caddr_t *)&ahc->qoutfifo, &ahc->shared_data_busaddr, &ahc->shared_data_seg, &ahc->shared_data_nseg, ahc_name(ahc), "shared data") < 0) return (ENOMEM); ahc->init_level++; /* Allocate SCB data now that parent_dmat is initialized */ if (ahc->scb_data->maxhscbs == 0) if (ahcinitscbdata(ahc) != 0) return (ENOMEM); ahc->qinfifo = &ahc->qoutfifo[256]; ahc->untagged_scbs = &ahc->qinfifo[256]; /* There are no untagged SCBs active yet. */ for (i = 0; i < 256; i++) ahc->untagged_scbs[i] = SCB_LIST_NULL; /* All of our queues are empty */ for (i = 0; i < 256; i++) ahc->qoutfifo[i] = SCB_LIST_NULL; bus_dmamap_sync(ahc->parent_dmat, ahc->shared_data_dmamap, 0, driver_data_size, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); /* * Allocate a tstate to house information for our * initiator presence on the bus as well as the user * data for any target mode initiator. */ if (ahc_alloc_tstate(ahc, ahc->our_id, 'A') == NULL) { printf("%s: unable to allocate tmode_tstate. " "Failing attach\n", ahc_name(ahc)); return (-1); } if ((ahc->features & AHC_TWIN) != 0) { if (ahc_alloc_tstate(ahc, ahc->our_id_b, 'B') == NULL) { printf("%s: unable to allocate tmode_tstate. " "Failing attach\n", ahc_name(ahc)); return (-1); } printf("Twin Channel, A SCSI Id=%d, B SCSI Id=%d, primary %c, ", ahc->our_id, ahc->our_id_b, ahc->flags & AHC_CHANNEL_B_PRIMARY? 'B': 'A'); } else { if ((ahc->features & AHC_WIDE) != 0) { printf("Wide "); } else { printf("Single "); } printf("Channel %c, SCSI Id=%d, ", ahc->channel, ahc->our_id); } ahc_outb(ahc, SEQ_FLAGS, 0); if (ahc->scb_data->maxhscbs < AHC_SCB_MAX) { ahc->flags |= AHC_PAGESCBS; printf("%d/%d SCBs\n", ahc->scb_data->maxhscbs, AHC_SCB_MAX); } else { ahc->flags &= ~AHC_PAGESCBS; printf("%d SCBs\n", ahc->scb_data->maxhscbs); } #ifdef AHC_DEBUG if (ahc_debug & AHC_SHOWMISC) { printf("%s: hardware scb %d bytes; kernel scb %d bytes; " "ahc_dma %d bytes\n", ahc_name(ahc), sizeof(struct hardware_scb), sizeof(struct scb), sizeof(struct ahc_dma_seg)); } #endif /* AHC_DEBUG */ /* Set the SCSI Id, SXFRCTL0, SXFRCTL1, and SIMODE1, for both channels*/ if (ahc->features & AHC_TWIN) { /* * The device is gated to channel B after a chip reset, * so set those values first */ term = (ahc->flags & AHC_TERM_ENB_B) != 0 ? STPWEN : 0; if ((ahc->features & AHC_ULTRA2) != 0) ahc_outb(ahc, SCSIID_ULTRA2, ahc->our_id_b); else ahc_outb(ahc, SCSIID, ahc->our_id_b); scsi_conf = ahc_inb(ahc, SCSICONF + 1); ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL)) |term|ENSTIMER|ACTNEGEN); ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR); ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN); if ((scsi_conf & RESET_SCSI) != 0 && (ahc->flags & AHC_INITIATORMODE) != 0) ahc->flags |= AHC_RESET_BUS_B; /* Select Channel A */ ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~SELBUSB); } term = (ahc->flags & AHC_TERM_ENB_A) != 0 ? STPWEN : 0; if ((ahc->features & AHC_ULTRA2) != 0) ahc_outb(ahc, SCSIID_ULTRA2, ahc->our_id); else ahc_outb(ahc, SCSIID, ahc->our_id); scsi_conf = ahc_inb(ahc, SCSICONF); ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL)) |term |ENSTIMER|ACTNEGEN); ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR); ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN); if ((scsi_conf & RESET_SCSI) != 0 && (ahc->flags & AHC_INITIATORMODE) != 0) ahc->flags |= AHC_RESET_BUS_A; /* * Look at the information that board initialization or * the board bios has left us. */ ultraenb = 0; tagenable = ALL_TARGETS_MASK; /* Grab the disconnection disable table and invert it for our needs */ if (ahc->flags & AHC_USEDEFAULTS) { printf("%s: Host Adapter Bios disabled. Using default SCSI " "device parameters\n", ahc_name(ahc)); ahc->flags |= AHC_EXTENDED_TRANS_A|AHC_EXTENDED_TRANS_B| AHC_TERM_ENB_A|AHC_TERM_ENB_B; discenable = ALL_TARGETS_MASK; if ((ahc->features & AHC_ULTRA) != 0) ultraenb = ALL_TARGETS_MASK; } else { discenable = ~((ahc_inb(ahc, DISC_DSB + 1) << 8) | ahc_inb(ahc, DISC_DSB)); if ((ahc->features & (AHC_ULTRA|AHC_ULTRA2)) != 0) ultraenb = (ahc_inb(ahc, ULTRA_ENB + 1) << 8) | ahc_inb(ahc, ULTRA_ENB); } if ((ahc->features & (AHC_WIDE|AHC_TWIN)) == 0) max_targ = 7; for (i = 0; i <= max_targ; i++) { struct ahc_initiator_tinfo *tinfo; struct tmode_tstate *tstate; u_int our_id; u_int target_id; char channel; channel = 'A'; our_id = ahc->our_id; target_id = i; if (i > 7 && (ahc->features & AHC_TWIN) != 0) { channel = 'B'; our_id = ahc->our_id_b; target_id = i % 8; } tinfo = ahc_fetch_transinfo(ahc, channel, our_id, target_id, &tstate); /* Default to async narrow across the board */ bzero(tinfo, sizeof(*tinfo)); if (ahc->flags & AHC_USEDEFAULTS) { if ((ahc->features & AHC_WIDE) != 0) tinfo->user.width = MSG_EXT_WDTR_BUS_16_BIT; /* * These will be truncated when we determine the * connection type we have with the target. */ tinfo->user.period = ahc_syncrates->period; tinfo->user.offset = ~0; } else { u_int scsirate; u_int16_t mask; /* Take the settings leftover in scratch RAM. */ scsirate = ahc_inb(ahc, TARG_SCSIRATE + i); mask = (0x01 << i); if ((ahc->features & AHC_ULTRA2) != 0) { u_int offset; u_int maxsync; if ((scsirate & SOFS) == 0x0F) { /* * Haven't negotiated yet, * so the format is different. */ scsirate = (scsirate & SXFR) >> 4 | (ultraenb & mask) ? 0x08 : 0x0 | (scsirate & WIDEXFER); offset = MAX_OFFSET_ULTRA2; } else offset = ahc_inb(ahc, TARG_OFFSET + i); maxsync = AHC_SYNCRATE_ULTRA2; if ((ahc->features & AHC_DT) != 0) maxsync = AHC_SYNCRATE_DT; tinfo->user.period = ahc_find_period(ahc, scsirate, maxsync); if (offset == 0) tinfo->user.period = 0; else tinfo->user.offset = ~0; } else if ((scsirate & SOFS) != 0) { tinfo->user.period = ahc_find_period(ahc, scsirate, (ultraenb & mask) ? AHC_SYNCRATE_ULTRA : AHC_SYNCRATE_FAST); if (tinfo->user.period != 0) tinfo->user.offset = ~0; } if ((scsirate & WIDEXFER) != 0 && (ahc->features & AHC_WIDE) != 0) tinfo->user.width = MSG_EXT_WDTR_BUS_16_BIT; } tinfo->goal = tinfo->user; /* force negotiation */ tstate->ultraenb = ultraenb; tstate->discenable = discenable; tstate->tagenable = 0; /* Wait until the XPT says its okay */ } ahc->user_discenable = discenable; ahc->user_tagenable = tagenable; /* * Tell the sequencer where it can find our arrays in memory. */ physaddr = ahc->scb_data->hscb_busaddr; ahc_outb(ahc, HSCB_ADDR, physaddr & 0xFF); ahc_outb(ahc, HSCB_ADDR + 1, (physaddr >> 8) & 0xFF); ahc_outb(ahc, HSCB_ADDR + 2, (physaddr >> 16) & 0xFF); ahc_outb(ahc, HSCB_ADDR + 3, (physaddr >> 24) & 0xFF); physaddr = ahc->shared_data_busaddr; ahc_outb(ahc, SCBID_ADDR, physaddr & 0xFF); ahc_outb(ahc, SCBID_ADDR + 1, (physaddr >> 8) & 0xFF); ahc_outb(ahc, SCBID_ADDR + 2, (physaddr >> 16) & 0xFF); ahc_outb(ahc, SCBID_ADDR + 3, (physaddr >> 24) & 0xFF); /* Target mode incomding command fifo */ physaddr += 3 * 256 * sizeof(u_int8_t); ahc_outb(ahc, TMODE_CMDADDR, physaddr & 0xFF); ahc_outb(ahc, TMODE_CMDADDR + 1, (physaddr >> 8) & 0xFF); ahc_outb(ahc, TMODE_CMDADDR + 2, (physaddr >> 16) & 0xFF); ahc_outb(ahc, TMODE_CMDADDR + 3, (physaddr >> 24) & 0xFF); /* * Initialize the group code to command length table. * This overrides the values in TARG_SCSIRATE, so only * setup the table after we have processed that information. */ ahc_outb(ahc, CMDSIZE_TABLE, 5); ahc_outb(ahc, CMDSIZE_TABLE + 1, 9); ahc_outb(ahc, CMDSIZE_TABLE + 2, 9); ahc_outb(ahc, CMDSIZE_TABLE + 3, 0); ahc_outb(ahc, CMDSIZE_TABLE + 4, 15); ahc_outb(ahc, CMDSIZE_TABLE + 5, 11); ahc_outb(ahc, CMDSIZE_TABLE + 6, 0); ahc_outb(ahc, CMDSIZE_TABLE + 7, 0); /* Tell the sequencer of our initial queue positions */ ahc_outb(ahc, KERNEL_QINPOS, 0); ahc_outb(ahc, QINPOS, 0); ahc_outb(ahc, QOUTPOS, 0); #ifdef AHC_DEBUG if (ahc_debug & AHC_SHOWMISC) printf("DISCENABLE == 0x%x\nULTRAENB == 0x%x\n", discenable, ultraenb); #endif /* Don't have any special messages to send to targets */ ahc_outb(ahc, TARGET_MSG_REQUEST, 0); ahc_outb(ahc, TARGET_MSG_REQUEST + 1, 0); /* * Use the built in queue management registers * if they are available. */ if ((ahc->features & AHC_QUEUE_REGS) != 0) { ahc_outb(ahc, QOFF_CTLSTA, SCB_QSIZE_256); ahc_outb(ahc, SDSCB_QOFF, 0); ahc_outb(ahc, SNSCB_QOFF, 0); ahc_outb(ahc, HNSCB_QOFF, 0); } /* We don't have any waiting selections */ ahc_outb(ahc, WAITING_SCBH, SCB_LIST_NULL); /* Our disconnection list is empty too */ ahc_outb(ahc, DISCONNECTED_SCBH, SCB_LIST_NULL); /* Message out buffer starts empty */ ahc_outb(ahc, MSG_OUT, MSG_NOOP); /* * Setup the allowed SCSI Sequences based on operational mode. * If we are a target, we'll enalbe select in operations once * we've had a lun enabled. */ scsiseq_template = ENSELO|ENAUTOATNO|ENAUTOATNP; if ((ahc->flags & AHC_INITIATORMODE) != 0) scsiseq_template |= ENRSELI; ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq_template); /* * Load the Sequencer program and Enable the adapter * in "fast" mode. */ #ifdef AHC_DEBUG printf("%s: Downloading Sequencer Program...", ahc_name(ahc)); #endif ahc_loadseq(ahc); /* We have to wait until after any system dumps... */ shutdownhook_establish(ahc_shutdown, ahc); return (0); } /* * XXX fvdl the busy_tcl checks and settings should only be done * for the non-tagged queueing case, but we don't do tagged queueing * yet, so.. */ static int32_t ahc_action(struct scsipi_xfer *xs) { struct scsipi_xfer *first_xs, *next_xs = NULL; struct ahc_softc *ahc; struct scb *scb; struct hardware_scb *hscb; struct ahc_initiator_tinfo *tinfo; struct tmode_tstate *tstate; u_int target_id; u_int our_id; int s, tcl; u_int16_t mask; int dontqueue = 0, fromqueue = 0; SC_DEBUG(xs->sc_link, SDEV_DB3, ("ahc_action\n")); ahc = (struct ahc_softc *)xs->sc_link->adapter_softc; /* must protect the queue */ s = splbio(); if (xs == TAILQ_FIRST(&ahc->sc_q)) { /* * Called from ahc_done. Calling with the first entry in * the queue is really just a way of seeing where we're * called from. Now, find the first eligible SCB to send, * e.g. one which will be accepted immediately. */ if (ahc->queue_blocked) { splx(s); return (TRY_AGAIN_LATER); } xs = ahc_first_xs(ahc); if (xs == NULL) { splx(s); return (TRY_AGAIN_LATER); } next_xs = TAILQ_NEXT(xs, adapter_q); TAILQ_REMOVE(&ahc->sc_q, xs, adapter_q); fromqueue = 1; goto get_scb; } /* * If no new requests are accepted, just insert into the * private queue to wait for our turn. */ tcl = XS_TCL(ahc, xs); if (ahc->queue_blocked || ahc->devqueue_blocked[xs->sc_link->scsipi_scsi.target] || (!ahc_istagged_device(ahc, xs) && ahc_index_busy_tcl(ahc, tcl, FALSE) != SCB_LIST_NULL)) { if (dontqueue) { splx(s); xs->error = XS_DRIVER_STUFFUP; return TRY_AGAIN_LATER; } TAILQ_INSERT_TAIL(&ahc->sc_q, xs, adapter_q); splx(s); return SUCCESSFULLY_QUEUED; } first_xs = ahc_first_xs(ahc); /* determine safety of software queueing */ dontqueue = xs->xs_control & XS_CTL_POLL; /* * Handle situations where there's already entries in the * queue. */ if (first_xs != NULL) { /* * If we can't queue, we have to abort, since * we have to preserve order. */ if (dontqueue) { splx(s); xs->error = XS_DRIVER_STUFFUP; return (TRY_AGAIN_LATER); } /* * Swap with the first queue entry. */ TAILQ_INSERT_TAIL(&ahc->sc_q, xs, adapter_q); xs = first_xs; next_xs = TAILQ_NEXT(xs, adapter_q); TAILQ_REMOVE(&ahc->sc_q, xs, adapter_q); fromqueue = 1; } get_scb: target_id = xs->sc_link->scsipi_scsi.target; our_id = SIM_SCSI_ID(ahc, xs->sc_link); /* * get an scb to use. */ if ((scb = ahcgetscb(ahc)) == NULL) { if (dontqueue) { splx(s); xs->error = XS_DRIVER_STUFFUP; return (TRY_AGAIN_LATER); } /* * If we were pulled off the queue, put ourselves * back to where we came from, otherwise tack ourselves * onto the end. */ if (fromqueue && next_xs != NULL) TAILQ_INSERT_BEFORE(xs, next_xs, adapter_q); else TAILQ_INSERT_TAIL(&ahc->sc_q, xs, adapter_q); splx(s); return (SUCCESSFULLY_QUEUED); } tcl = XS_TCL(ahc, xs); #ifdef DIAGNOSTIC if (!ahc_istagged_device(ahc, xs) && ahc_index_busy_tcl(ahc, tcl, FALSE) != SCB_LIST_NULL) panic("ahc: queuing for busy target"); #endif scb->xs = xs; hscb = scb->hscb; hscb->tcl = tcl; if (ahc_istagged_device(ahc, xs)) scb->hscb->control |= MSG_SIMPLE_Q_TAG; else ahc_busy_tcl(ahc, scb); splx(s); /* * Put all the arguments for the xfer in the scb */ mask = SCB_TARGET_MASK(scb); tinfo = ahc_fetch_transinfo(ahc, SIM_CHANNEL(ahc, xs->sc_link), our_id, target_id, &tstate); if (ahc->inited_targets[target_id] == 0) { struct ahc_devinfo devinfo; s = splbio(); ahc_compile_devinfo(&devinfo, our_id, target_id, xs->sc_link->scsipi_scsi.lun, SIM_CHANNEL(ahc, xs->sc_link), ROLE_INITIATOR); ahc_update_target_msg_request(ahc, &devinfo, tinfo, TRUE, FALSE); ahc->inited_targets[target_id] = 1; splx(s); } hscb->scsirate = tinfo->scsirate; hscb->scsioffset = tinfo->current.offset; if ((tstate->ultraenb & mask) != 0) hscb->control |= ULTRAENB; if ((tstate->discenable & mask) != 0) hscb->control |= DISCENB; if (xs->xs_control & XS_CTL_RESET) { hscb->cmdpointer = NULL; scb->flags |= SCB_DEVICE_RESET; hscb->control |= MK_MESSAGE; return ahc_execute_scb(scb, NULL, 0); } return ahc_setup_data(ahc, xs, scb); } static int ahc_execute_scb(void *arg, bus_dma_segment_t *dm_segs, int nsegments) { struct scb *scb; struct scsipi_xfer *xs; struct ahc_softc *ahc; int s; scb = (struct scb *)arg; xs = scb->xs; ahc = (struct ahc_softc *)xs->sc_link->adapter_softc; if (nsegments != 0) { struct ahc_dma_seg *sg; bus_dma_segment_t *end_seg; int op; end_seg = dm_segs + nsegments; /* Copy the first SG into the data pointer area */ scb->hscb->data = dm_segs->ds_addr; scb->hscb->datalen = dm_segs->ds_len; /* Copy the segments into our SG list */ sg = scb->sg_list; while (dm_segs < end_seg) { sg->addr = dm_segs->ds_addr; sg->len = dm_segs->ds_len; ahc_swap_sg(sg); sg++; dm_segs++; } /* Note where to find the SG entries in bus space */ scb->hscb->SG_pointer = scb->sg_list_phys; if (xs->xs_control & XS_CTL_DATA_IN) op = BUS_DMASYNC_PREREAD; else op = BUS_DMASYNC_PREWRITE; bus_dmamap_sync(ahc->parent_dmat, scb->dmamap, 0, scb->dmamap->dm_mapsize, op); } else { scb->hscb->SG_pointer = 0; scb->hscb->data = 0; scb->hscb->datalen = 0; } scb->sg_count = scb->hscb->SG_count = nsegments; s = splbio(); /* * Last time we need to check if this SCB needs to * be aborted. */ if (xs->xs_status & XS_STS_DONE) { if (!ahc_istagged_device(ahc, xs)) ahc_index_busy_tcl(ahc, scb->hscb->tcl, TRUE); if (nsegments != 0) bus_dmamap_unload(ahc->parent_dmat, scb->dmamap); ahcfreescb(ahc, scb); splx(s); return (COMPLETE); } #ifdef DIAGNOSTIC if (scb->sg_count > 255) panic("ahc bad sg_count"); #endif ahc_swap_hscb(scb->hscb); LIST_INSERT_HEAD(&ahc->pending_ccbs, scb, plinks); scb->flags |= SCB_ACTIVE; if (!(xs->xs_control & XS_CTL_POLL)) callout_reset(&scb->xs->xs_callout, (xs->timeout * hz) / 1000, ahc_timeout, scb); if ((scb->flags & SCB_TARGET_IMMEDIATE) != 0) { #if 0 printf("Continueing Immediate Command %d:%d\n", xs->sc_link->scsipi_scsi.target, xs->sc_link->scsipi_scsi.lun); #endif pause_sequencer(ahc); if ((ahc->flags & AHC_PAGESCBS) == 0) ahc_outb(ahc, SCBPTR, scb->hscb->tag); ahc_outb(ahc, SCB_TAG, scb->hscb->tag); ahc_outb(ahc, RETURN_1, CONT_MSG_LOOP); unpause_sequencer(ahc); } else { #if 0 printf("tag %x at qpos %u vaddr %p paddr 0x%lx\n", scb->hscb->tag, ahc->qinfifonext, &ahc->qinfifo[ahc->qinfifonext], ahc->shared_data_busaddr + 1024 + ahc->qinfifonext); #endif ahc->qinfifo[ahc->qinfifonext++] = scb->hscb->tag; bus_dmamap_sync(ahc->parent_dmat, ahc->shared_data_dmamap, QINFIFO_OFFSET * 256, 256, BUS_DMASYNC_PREWRITE); if ((ahc->features & AHC_QUEUE_REGS) != 0) { ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext); } else { pause_sequencer(ahc); ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext); unpause_sequencer(ahc); } } #ifdef AHC_DEBUG if (ahc_debug & AHC_SHOWCMDS) { scsi_print_addr(xs->sc_link); printf("opcode %d tag %x len %d flags %x control %x fpos %u" " rate %x\n", xs->cmdstore.opcode, scb->hscb->tag, scb->hscb->datalen, scb->flags, scb->hscb->control, ahc->qinfifonext, scb->hscb->scsirate); } #endif if (!(xs->xs_control & XS_CTL_POLL)) { splx(s); return (SUCCESSFULLY_QUEUED); } /* * If we can't use interrupts, poll for completion */ SC_DEBUG(xs->sc_link, SDEV_DB3, ("cmd_poll\n")); do { if (ahc_poll(ahc, xs->timeout)) { if (!(xs->xs_control & XS_CTL_SILENT)) printf("cmd fail\n"); ahc_timeout(scb); break; } } while (!(xs->xs_status & XS_STS_DONE)); splx(s); return (COMPLETE); } static int ahc_poll(struct ahc_softc *ahc, int wait) { while (--wait) { DELAY(1000); if (ahc_inb(ahc, INTSTAT) & INT_PEND) break; } if (wait == 0) { printf("%s: board is not responding\n", ahc_name(ahc)); return (EIO); } ahc_intr((void *)ahc); return (0); } static int ahc_setup_data(struct ahc_softc *ahc, struct scsipi_xfer *xs, struct scb *scb) { struct hardware_scb *hscb; hscb = scb->hscb; xs->resid = xs->status = 0; hscb->cmdlen = xs->cmdlen; memcpy(hscb->cmdstore, xs->cmd, xs->cmdlen); hscb->cmdpointer = hscb->cmdstore_busaddr; /* Only use S/G if there is a transfer */ if (xs->datalen) { int error; error = bus_dmamap_load(ahc->parent_dmat, scb->dmamap, xs->data, xs->datalen, NULL, (xs->xs_control & XS_CTL_NOSLEEP) ? BUS_DMA_NOWAIT : BUS_DMA_WAITOK); if (error) { if (!ahc_istagged_device(ahc, xs)) ahc_index_busy_tcl(ahc, hscb->tcl, TRUE); return (TRY_AGAIN_LATER); /* XXX fvdl */ } error = ahc_execute_scb(scb, scb->dmamap->dm_segs, scb->dmamap->dm_nsegs); return error; } else { return ahc_execute_scb(scb, NULL, 0); } } static void ahc_freeze_devq(struct ahc_softc *ahc, struct scsipi_link *sc_link) { int target; char channel; int lun; target = sc_link->scsipi_scsi.target; lun = sc_link->scsipi_scsi.lun; channel = sc_link->scsipi_scsi.channel; ahc_search_qinfifo(ahc, target, channel, lun, /*tag*/SCB_LIST_NULL, ROLE_UNKNOWN, SCB_REQUEUE, SEARCH_COMPLETE); } static void ahcallocscbs(struct ahc_softc *ahc) { struct scb_data *scb_data; struct scb *next_scb; struct sg_map_node *sg_map; bus_addr_t physaddr; struct ahc_dma_seg *segs; int newcount; int i; scb_data = ahc->scb_data; if (scb_data->numscbs >= AHC_SCB_MAX) /* Can't allocate any more */ return; next_scb = &scb_data->scbarray[scb_data->numscbs]; sg_map = malloc(sizeof(*sg_map), M_DEVBUF, M_NOWAIT); if (sg_map == NULL) return; if (ahc_createdmamem(ahc->parent_dmat, PAGE_SIZE, ahc->sc_dmaflags, &sg_map->sg_dmamap, (caddr_t *)&sg_map->sg_vaddr, &sg_map->sg_physaddr, &sg_map->sg_dmasegs, &sg_map->sg_nseg, ahc_name(ahc), "SG space") < 0) { free(sg_map, M_DEVBUF); return; } SLIST_INSERT_HEAD(&scb_data->sg_maps, sg_map, links); segs = sg_map->sg_vaddr; physaddr = sg_map->sg_physaddr; newcount = (PAGE_SIZE / (AHC_NSEG * sizeof(struct ahc_dma_seg))); for (i = 0; scb_data->numscbs < AHC_SCB_MAX && i < newcount; i++) { int error; next_scb->sg_list = segs; /* * The sequencer always starts with the second entry. * The first entry is embedded in the scb. */ next_scb->sg_list_phys = physaddr + sizeof(struct ahc_dma_seg); next_scb->flags = SCB_FREE; error = bus_dmamap_create(ahc->parent_dmat, AHC_MAXTRANSFER_SIZE, AHC_NSEG, MAXBSIZE, 0, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW|ahc->sc_dmaflags, &next_scb->dmamap); if (error != 0) break; next_scb->hscb = &scb_data->hscbs[scb_data->numscbs]; next_scb->hscb->tag = ahc->scb_data->numscbs; next_scb->hscb->cmdstore_busaddr = ahc_hscb_busaddr(ahc, next_scb->hscb->tag) + offsetof(struct hardware_scb, cmdstore); next_scb->hscb->cmdstore_busaddr = htole32(next_scb->hscb->cmdstore_busaddr); SLIST_INSERT_HEAD(&ahc->scb_data->free_scbs, next_scb, links); segs += AHC_NSEG; physaddr += (AHC_NSEG * sizeof(struct ahc_dma_seg)); next_scb++; ahc->scb_data->numscbs++; } #ifdef AHC_DEBUG if (ahc_debug & AHC_SHOWSCBALLOC) printf("%s: allocated %d new SCBs count now %d\n", ahc_name(ahc), i - 1, ahc->scb_data->numscbs); #endif } #ifdef AHC_DUMP_SEQ static void ahc_dumpseq(struct ahc_softc* ahc) { int i; int max_prog; if ((ahc->chip & AHC_BUS_MASK) < AHC_PCI) max_prog = 448; else if ((ahc->features & AHC_ULTRA2) != 0) max_prog = 768; else max_prog = 512; ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE|LOADRAM); ahc_outb(ahc, SEQADDR0, 0); ahc_outb(ahc, SEQADDR1, 0); for (i = 0; i < max_prog; i++) { u_int8_t ins_bytes[4]; ahc_insb(ahc, SEQRAM, ins_bytes, 4); printf("0x%08x\n", ins_bytes[0] << 24 | ins_bytes[1] << 16 | ins_bytes[2] << 8 | ins_bytes[3]); } } #endif static void ahc_loadseq(struct ahc_softc *ahc) { struct patch *cur_patch; int i; int downloaded; int skip_addr; u_int8_t download_consts[4]; /* Setup downloadable constant table */ #if 0 /* No downloaded constants are currently defined. */ download_consts[TMODE_NUMCMDS] = ahc->num_targetcmds; #endif cur_patch = patches; downloaded = 0; skip_addr = 0; ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE|LOADRAM); ahc_outb(ahc, SEQADDR0, 0); ahc_outb(ahc, SEQADDR1, 0); for (i = 0; i < sizeof(seqprog)/4; i++) { if (ahc_check_patch(ahc, &cur_patch, i, &skip_addr) == 0) { /* * Don't download this instruction as it * is in a patch that was removed. */ continue; } ahc_download_instr(ahc, i, download_consts); downloaded++; } ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE); restart_sequencer(ahc); #ifdef AHC_DEBUG printf(" %d instructions downloaded\n", downloaded); #endif } static int ahc_check_patch(struct ahc_softc *ahc, struct patch **start_patch, int start_instr, int *skip_addr) { struct patch *cur_patch; struct patch *last_patch; int num_patches; num_patches = sizeof(patches)/sizeof(struct patch); last_patch = &patches[num_patches]; cur_patch = *start_patch; while (cur_patch < last_patch && start_instr == cur_patch->begin) { if (cur_patch->patch_func(ahc) == 0) { /* Start rejecting code */ *skip_addr = start_instr + cur_patch->skip_instr; cur_patch += cur_patch->skip_patch; } else { /* Accepted this patch. Advance to the next * one and wait for our intruction pointer to * hit this point. */ cur_patch++; } } *start_patch = cur_patch; if (start_instr < *skip_addr) /* Still skipping */ return (0); return (1); } static void ahc_download_instr(struct ahc_softc *ahc, int instrptr, u_int8_t *dconsts) { union ins_formats instr; struct ins_format1 *fmt1_ins; struct ins_format3 *fmt3_ins; u_int opcode; /* Structure copy */ instr = *(union ins_formats*)&seqprog[instrptr * 4]; instr.integer = le32toh(instr.integer); fmt1_ins = &instr.format1; fmt3_ins = NULL; /* Pull the opcode */ opcode = instr.format1.opcode; switch (opcode) { case AIC_OP_JMP: case AIC_OP_JC: case AIC_OP_JNC: case AIC_OP_CALL: case AIC_OP_JNE: case AIC_OP_JNZ: case AIC_OP_JE: case AIC_OP_JZ: { struct patch *cur_patch; int address_offset; u_int address; int skip_addr; int i; fmt3_ins = &instr.format3; address_offset = 0; address = fmt3_ins->address; cur_patch = patches; skip_addr = 0; for (i = 0; i < address;) { ahc_check_patch(ahc, &cur_patch, i, &skip_addr); if (skip_addr > i) { int end_addr; end_addr = MIN(address, skip_addr); address_offset += end_addr - i; i = skip_addr; } else { i++; } } address -= address_offset; fmt3_ins->address = address; /* FALLTHROUGH */ } case AIC_OP_OR: case AIC_OP_AND: case AIC_OP_XOR: case AIC_OP_ADD: case AIC_OP_ADC: case AIC_OP_BMOV: if (fmt1_ins->parity != 0) { fmt1_ins->immediate = dconsts[fmt1_ins->immediate]; } fmt1_ins->parity = 0; /* FALLTHROUGH */ case AIC_OP_ROL: if ((ahc->features & AHC_ULTRA2) != 0) { int i, count; /* Calculate odd parity for the instruction */ for (i = 0, count = 0; i < 31; i++) { u_int32_t mask; mask = 0x01 << i; if ((instr.integer & mask) != 0) count++; } if ((count & 0x01) == 0) instr.format1.parity = 1; } else { /* Compress the instruction for older sequencers */ if (fmt3_ins != NULL) { instr.integer = fmt3_ins->immediate | (fmt3_ins->source << 8) | (fmt3_ins->address << 16) | (fmt3_ins->opcode << 25); } else { instr.integer = fmt1_ins->immediate | (fmt1_ins->source << 8) | (fmt1_ins->destination << 16) | (fmt1_ins->ret << 24) | (fmt1_ins->opcode << 25); } } instr.integer = htole32(instr.integer); ahc_outsb(ahc, SEQRAM, instr.bytes, 4); break; default: panic("Unknown opcode encountered in seq program"); break; } } static void ahc_set_recoveryscb(struct ahc_softc *ahc, struct scb *scb) { if ((scb->flags & SCB_RECOVERY_SCB) == 0) { struct scb *scbp; scb->flags |= SCB_RECOVERY_SCB; /* * Take all queued, but not sent SCBs out of the equation. * Also ensure that no new CCBs are queued to us while we * try to fix this problem. */ ahc->queue_blocked = 1; /* * Go through all of our pending SCBs and remove * any scheduled timeouts for them. We will reschedule * them after we've successfully fixed this problem. */ scbp = ahc->pending_ccbs.lh_first; while (scbp != NULL) { callout_stop(&scbp->xs->xs_callout); scbp = scbp->plinks.le_next; } } } static void ahc_timeout(void *arg) { struct scb *scb; struct ahc_softc *ahc; int s, found; u_int last_phase; int target; int lun; int i; char channel; scb = (struct scb *)arg; ahc = (struct ahc_softc *)scb->xs->sc_link->adapter_softc; s = splbio(); /* * Ensure that the card doesn't do anything * behind our back. Also make sure that we * didn't "just" miss an interrupt that would * affect this timeout. */ do { ahc_intr(ahc); pause_sequencer(ahc); } while (ahc_inb(ahc, INTSTAT) & INT_PEND); if ((scb->flags & SCB_ACTIVE) == 0) { /* Previous timeout took care of me already */ printf("Timedout SCB handled by another timeout\n"); unpause_sequencer(ahc); splx(s); return; } target = SCB_TARGET(scb); channel = SCB_CHANNEL(scb); lun = SCB_LUN(scb); scsi_print_addr(scb->xs->sc_link); printf("SCB %x - timed out ", scb->hscb->tag); /* * Take a snapshot of the bus state and print out * some information so we can track down driver bugs. */ last_phase = ahc_inb(ahc, LASTPHASE); for (i = 0; i < num_phases; i++) { if (last_phase == phase_table[i].phase) break; } printf("%s", phase_table[i].phasemsg); printf(", SEQADDR == 0x%x\n", ahc_inb(ahc, SEQADDR0) | (ahc_inb(ahc, SEQADDR1) << 8)); printf("SCSIRATE == 0x%x\n", ahc_inb(ahc, SCSIRATE)); #ifdef AHC_DEBUG ahc_print_scb(scb); #endif #if 0 printf("SSTAT1 == 0x%x\n", ahc_inb(ahc, SSTAT1)); printf("SSTAT3 == 0x%x\n", ahc_inb(ahc, SSTAT3)); printf("SCSIPHASE == 0x%x\n", ahc_inb(ahc, SCSIPHASE)); printf("SCSIOFFSET == 0x%x\n", ahc_inb(ahc, SCSIOFFSET)); printf("SEQ_FLAGS == 0x%x\n", ahc_inb(ahc, SEQ_FLAGS)); printf("SCB_DATAPTR == 0x%x\n", ahc_inb(ahc, SCB_DATAPTR) | ahc_inb(ahc, SCB_DATAPTR + 1) << 8 | ahc_inb(ahc, SCB_DATAPTR + 2) << 16 | ahc_inb(ahc, SCB_DATAPTR + 3) << 24); printf("SCB_DATACNT == 0x%x\n", ahc_inb(ahc, SCB_DATACNT) | ahc_inb(ahc, SCB_DATACNT + 1) << 8 | ahc_inb(ahc, SCB_DATACNT + 2) << 16); printf("SCB_SGCOUNT == 0x%x\n", ahc_inb(ahc, SCB_SGCOUNT)); printf("CCSCBCTL == 0x%x\n", ahc_inb(ahc, CCSCBCTL)); printf("CCSCBCNT == 0x%x\n", ahc_inb(ahc, CCSCBCNT)); printf("DFCNTRL == 0x%x\n", ahc_inb(ahc, DFCNTRL)); printf("DFSTATUS == 0x%x\n", ahc_inb(ahc, DFSTATUS)); printf("CCHCNT == 0x%x\n", ahc_inb(ahc, CCHCNT)); if (scb->sg_count > 0) { for (i = 0; i < scb->sg_count; i++) { printf("sg[%d] - Addr 0x%x : Length %d\n", i, le32toh(scb->sg_list[i].addr), le32toh(scb->sg_list[i].len)); } } #endif if (scb->flags & (SCB_DEVICE_RESET|SCB_ABORT)) { /* * Been down this road before. * Do a full bus reset. */ bus_reset: ahcsetccbstatus(scb->xs, XS_TIMEOUT); found = ahc_reset_channel(ahc, channel, /*Initiate Reset*/TRUE); printf("%s: Issued Channel %c Bus Reset. " "%d SCBs aborted\n", ahc_name(ahc), channel, found); } else { /* * If we are a target, transition to bus free and report * the timeout. * * The target/initiator that is holding up the bus may not * be the same as the one that triggered this timeout * (different commands have different timeout lengths). * If the bus is idle and we are actiing as the initiator * for this request, queue a BDR message to the timed out * target. Otherwise, if the timed out transaction is * active: * Initiator transaction: * Stuff the message buffer with a BDR message and assert * ATN in the hopes that the target will let go of the bus * and go to the mesgout phase. If this fails, we'll * get another timeout 2 seconds later which will attempt * a bus reset. * * Target transaction: * Transition to BUS FREE and report the error. * It's good to be the target! */ u_int active_scb_index; active_scb_index = ahc_inb(ahc, SCB_TAG); if (last_phase != P_BUSFREE && (active_scb_index < ahc->scb_data->numscbs)) { struct scb *active_scb; /* * If the active SCB is not from our device, * assume that another device is hogging the bus * and wait for it's timeout to expire before * taking additional action. */ active_scb = &ahc->scb_data->scbarray[active_scb_index]; if (active_scb->hscb->tcl != scb->hscb->tcl) { u_int newtimeout; scsi_print_addr(scb->xs->sc_link); printf("Other SCB Timeout%s", (scb->flags & SCB_OTHERTCL_TIMEOUT) != 0 ? " again\n" : "\n"); scb->flags |= SCB_OTHERTCL_TIMEOUT; newtimeout = MAX(active_scb->xs->timeout, scb->xs->timeout); callout_reset(&scb->xs->xs_callout, (newtimeout * hz) / 1000, ahc_timeout, scb); splx(s); return; } /* It's us */ if ((scb->hscb->control & TARGET_SCB) != 0) { /* * Send back any queued up transactions * and properly record the error condition. */ ahc_freeze_devq(ahc, scb->xs->sc_link); ahcsetccbstatus(scb->xs, XS_TIMEOUT); ahc_freeze_ccb(scb); ahc_done(ahc, scb); /* Will clear us from the bus */ restart_sequencer(ahc); return; } ahc_set_recoveryscb(ahc, active_scb); ahc_outb(ahc, MSG_OUT, MSG_BUS_DEV_RESET); ahc_outb(ahc, SCSISIGO, last_phase|ATNO); scsi_print_addr(active_scb->xs->sc_link); printf("BDR message in message buffer\n"); active_scb->flags |= SCB_DEVICE_RESET; callout_reset(&active_scb->xs->xs_callout, 2 * hz, ahc_timeout, active_scb); unpause_sequencer(ahc); } else { int disconnected; /* XXX Shouldn't panic. Just punt instead */ if ((scb->hscb->control & TARGET_SCB) != 0) panic("Timed-out target SCB but bus idle"); if (last_phase != P_BUSFREE && (ahc_inb(ahc, SSTAT0) & TARGET) != 0) { /* XXX What happened to the SCB? */ /* Hung target selection. Goto busfree */ printf("%s: Hung target selection\n", ahc_name(ahc)); restart_sequencer(ahc); return; } if (ahc_search_qinfifo(ahc, target, channel, lun, scb->hscb->tag, ROLE_INITIATOR, /*status*/0, SEARCH_COUNT) > 0) { disconnected = FALSE; } else { disconnected = TRUE; } if (disconnected) { u_int active_scb; ahc_set_recoveryscb(ahc, scb); /* * Simply set the MK_MESSAGE control bit. */ scb->hscb->control |= MK_MESSAGE; scb->flags |= SCB_QUEUED_MSG | SCB_DEVICE_RESET; /* * Mark the cached copy of this SCB in the * disconnected list too, so that a reconnect * at this point causes a BDR or abort. */ active_scb = ahc_inb(ahc, SCBPTR); if (ahc_search_disc_list(ahc, target, channel, lun, scb->hscb->tag, /*stop_on_first*/TRUE, /*remove*/FALSE, /*save_state*/FALSE)) { u_int scb_control; scb_control = ahc_inb(ahc, SCB_CONTROL); scb_control |= MK_MESSAGE; ahc_outb(ahc, SCB_CONTROL, scb_control); } ahc_outb(ahc, SCBPTR, active_scb); ahc_index_busy_tcl(ahc, scb->hscb->tcl, /*unbusy*/TRUE); /* * Actually re-queue this SCB in case we can * select the device before it reconnects. * Clear out any entries in the QINFIFO first * so we are the next SCB for this target * to run. */ ahc_search_qinfifo(ahc, SCB_TARGET(scb), channel, SCB_LUN(scb), SCB_LIST_NULL, ROLE_INITIATOR, SCB_REQUEUE, SEARCH_COMPLETE); scsi_print_addr(scb->xs->sc_link); printf("Queuing a BDR SCB\n"); ahc->qinfifo[ahc->qinfifonext++] = scb->hscb->tag; bus_dmamap_sync(ahc->parent_dmat, ahc->shared_data_dmamap, QINFIFO_OFFSET * 256, 256, BUS_DMASYNC_PREWRITE); if ((ahc->features & AHC_QUEUE_REGS) != 0) { ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext); } else { ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext); } callout_reset(&scb->xs->xs_callout, 2 * hz, ahc_timeout, scb); unpause_sequencer(ahc); } else { /* Go "immediatly" to the bus reset */ /* This shouldn't happen */ ahc_set_recoveryscb(ahc, scb); scsi_print_addr(scb->xs->sc_link); printf("SCB %x: Immediate reset. " "Flags = 0x%x\n", scb->hscb->tag, scb->flags); goto bus_reset; } } } splx(s); } static int ahc_search_qinfifo(struct ahc_softc *ahc, int target, char channel, int lun, u_int tag, role_t role, scb_flag status, ahc_search_action action) { struct scb *scbp; u_int8_t qinpos; u_int8_t qintail; int found; qinpos = ahc_inb(ahc, QINPOS); qintail = ahc->qinfifonext; found = 0; /* * Start with an empty queue. Entries that are not chosen * for removal will be re-added to the queue as we go. */ ahc->qinfifonext = qinpos; bus_dmamap_sync(ahc->parent_dmat, ahc->shared_data_dmamap, QINFIFO_OFFSET * 256, 256, BUS_DMASYNC_POSTREAD); while (qinpos != qintail) { scbp = &ahc->scb_data->scbarray[ahc->qinfifo[qinpos]]; if (ahc_match_scb(scbp, target, channel, lun, tag, role)) { /* * We found an scb that needs to be removed. */ switch (action) { case SEARCH_COMPLETE: if (!(scbp->xs->xs_status & XS_STS_DONE)) { scbp->flags |= status; scbp->xs->error = XS_NOERROR; } ahc_freeze_ccb(scbp); ahc_done(ahc, scbp); break; case SEARCH_COUNT: ahc->qinfifo[ahc->qinfifonext++] = scbp->hscb->tag; break; case SEARCH_REMOVE: break; } found++; } else { ahc->qinfifo[ahc->qinfifonext++] = scbp->hscb->tag; } qinpos++; } bus_dmamap_sync(ahc->parent_dmat, ahc->shared_data_dmamap, QINFIFO_OFFSET * 256, 256, BUS_DMASYNC_PREWRITE); if ((ahc->features & AHC_QUEUE_REGS) != 0) { ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext); } else { ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext); } return (found); } /* * Abort all SCBs that match the given description (target/channel/lun/tag), * setting their status to the passed in status if the status has not already * been modified from CAM_REQ_INPROG. This routine assumes that the sequencer * is paused before it is called. */ static int ahc_abort_scbs(struct ahc_softc *ahc, int target, char channel, int lun, u_int tag, role_t role, int status) { struct scb *scbp; u_int active_scb; int i; int found; /* restore this when we're done */ active_scb = ahc_inb(ahc, SCBPTR); found = ahc_search_qinfifo(ahc, target, channel, lun, SCB_LIST_NULL, role, SCB_REQUEUE, SEARCH_COMPLETE); /* * Search waiting for selection list. */ { u_int8_t next, prev; next = ahc_inb(ahc, WAITING_SCBH); /* Start at head of list. */ prev = SCB_LIST_NULL; while (next != SCB_LIST_NULL) { u_int8_t scb_index; ahc_outb(ahc, SCBPTR, next); scb_index = ahc_inb(ahc, SCB_TAG); if (scb_index >= ahc->scb_data->numscbs) { panic("Waiting List inconsistency. " "SCB index == %d, yet numscbs == %d.", scb_index, ahc->scb_data->numscbs); } scbp = &ahc->scb_data->scbarray[scb_index]; if (ahc_match_scb(scbp, target, channel, lun, SCB_LIST_NULL, role)) { next = ahc_abort_wscb(ahc, next, prev); } else { prev = next; next = ahc_inb(ahc, SCB_NEXT); } } } /* * Go through the disconnected list and remove any entries we * have queued for completion, 0'ing their control byte too. * We save the active SCB and restore it ourselves, so there * is no reason for this search to restore it too. */ ahc_search_disc_list(ahc, target, channel, lun, tag, /*stop_on_first*/FALSE, /*remove*/TRUE, /*save_state*/FALSE); /* * Go through the hardware SCB array looking for commands that * were active but not on any list. */ for(i = 0; i < ahc->scb_data->maxhscbs; i++) { u_int scbid; ahc_outb(ahc, SCBPTR, i); scbid = ahc_inb(ahc, SCB_TAG); scbp = &ahc->scb_data->scbarray[scbid]; if (scbid < ahc->scb_data->numscbs && ahc_match_scb(scbp, target, channel, lun, tag, role)) ahc_add_curscb_to_free_list(ahc); } /* * Go through the pending CCB list and look for * commands for this target that are still active. * These are other tagged commands that were * disconnected when the reset occured. */ { struct scb *scb; scb = ahc->pending_ccbs.lh_first; while (scb != NULL) { scbp = scb; scb = scb->plinks.le_next; if (ahc_match_scb(scbp, target, channel, lun, tag, role)) { if (!(scbp->xs->xs_status & XS_STS_DONE)) ahcsetccbstatus(scbp->xs, status); ahc_freeze_ccb(scbp); ahc_done(ahc, scbp); found++; } } } ahc_outb(ahc, SCBPTR, active_scb); return found; } static int ahc_search_disc_list(struct ahc_softc *ahc, int target, char channel, int lun, u_int tag, int stop_on_first, int remove, int save_state) { struct scb *scbp; u_int next; u_int prev; u_int count; u_int active_scb; count = 0; next = ahc_inb(ahc, DISCONNECTED_SCBH); prev = SCB_LIST_NULL; if (save_state) { /* restore this when we're done */ active_scb = ahc_inb(ahc, SCBPTR); } else /* Silence compiler */ active_scb = SCB_LIST_NULL; while (next != SCB_LIST_NULL) { u_int scb_index; ahc_outb(ahc, SCBPTR, next); scb_index = ahc_inb(ahc, SCB_TAG); if (scb_index >= ahc->scb_data->numscbs) { panic("Disconnected List inconsistency. " "SCB index == %d, yet numscbs == %d.", scb_index, ahc->scb_data->numscbs); } scbp = &ahc->scb_data->scbarray[scb_index]; if (ahc_match_scb(scbp, target, channel, lun, tag, ROLE_INITIATOR)) { count++; if (remove) { next = ahc_rem_scb_from_disc_list(ahc, prev, next); } else { prev = next; next = ahc_inb(ahc, SCB_NEXT); } if (stop_on_first) break; } else { prev = next; next = ahc_inb(ahc, SCB_NEXT); } } if (save_state) ahc_outb(ahc, SCBPTR, active_scb); return (count); } static u_int ahc_rem_scb_from_disc_list(struct ahc_softc *ahc, u_int prev, u_int scbptr) { u_int next; ahc_outb(ahc, SCBPTR, scbptr); next = ahc_inb(ahc, SCB_NEXT); ahc_outb(ahc, SCB_CONTROL, 0); ahc_add_curscb_to_free_list(ahc); if (prev != SCB_LIST_NULL) { ahc_outb(ahc, SCBPTR, prev); ahc_outb(ahc, SCB_NEXT, next); } else ahc_outb(ahc, DISCONNECTED_SCBH, next); return (next); } static void ahc_add_curscb_to_free_list(struct ahc_softc *ahc) { /* Invalidate the tag so that ahc_find_scb doesn't think it's active */ ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL); ahc_outb(ahc, SCB_NEXT, ahc_inb(ahc, FREE_SCBH)); ahc_outb(ahc, FREE_SCBH, ahc_inb(ahc, SCBPTR)); } /* * Manipulate the waiting for selection list and return the * scb that follows the one that we remove. */ static u_int ahc_abort_wscb(struct ahc_softc *ahc, u_int scbpos, u_int prev) { u_int curscb, next; /* * Select the SCB we want to abort and * pull the next pointer out of it. */ curscb = ahc_inb(ahc, SCBPTR); ahc_outb(ahc, SCBPTR, scbpos); next = ahc_inb(ahc, SCB_NEXT); /* Clear the necessary fields */ ahc_outb(ahc, SCB_CONTROL, 0); ahc_add_curscb_to_free_list(ahc); /* update the waiting list */ if (prev == SCB_LIST_NULL) { /* First in the list */ ahc_outb(ahc, WAITING_SCBH, next); /* * Ensure we aren't attempting to perform * selection for this entry. */ ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO)); } else { /* * Select the scb that pointed to us * and update its next pointer. */ ahc_outb(ahc, SCBPTR, prev); ahc_outb(ahc, SCB_NEXT, next); } /* * Point us back at the original scb position. */ ahc_outb(ahc, SCBPTR, curscb); return next; } static void ahc_clear_intstat(struct ahc_softc *ahc) { /* Clear any interrupt conditions this may have caused */ ahc_outb(ahc, CLRSINT0, CLRSELDO|CLRSELDI|CLRSELINGO); ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRATNO|CLRSCSIRSTI |CLRBUSFREE|CLRSCSIPERR|CLRPHASECHG| CLRREQINIT); ahc_outb(ahc, CLRINT, CLRSCSIINT); } static void ahc_reset_current_bus(struct ahc_softc *ahc) { u_int8_t scsiseq; ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENSCSIRST); scsiseq = ahc_inb(ahc, SCSISEQ); ahc_outb(ahc, SCSISEQ, scsiseq | SCSIRSTO); DELAY(AHC_BUSRESET_DELAY); /* Turn off the bus reset */ ahc_outb(ahc, SCSISEQ, scsiseq & ~SCSIRSTO); ahc_clear_intstat(ahc); /* Re-enable reset interrupts */ ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) | ENSCSIRST); } static int ahc_reset_channel(struct ahc_softc *ahc, char channel, int initiate_reset) { u_int initiator, target, max_scsiid; u_int sblkctl; u_int our_id; int found; int restart_needed; char cur_channel; ahc->pending_device = NULL; pause_sequencer(ahc); /* * Run our command complete fifos to ensure that we perform * completion processing on any commands that 'completed' * before the reset occurred. */ ahc_run_qoutfifo(ahc); /* * Reset the bus if we are initiating this reset */ sblkctl = ahc_inb(ahc, SBLKCTL); cur_channel = 'A'; if ((ahc->features & AHC_TWIN) != 0 && ((sblkctl & SELBUSB) != 0)) cur_channel = 'B'; if (cur_channel != channel) { /* Case 1: Command for another bus is active * Stealthily reset the other bus without * upsetting the current bus. */ ahc_outb(ahc, SBLKCTL, sblkctl ^ SELBUSB); ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE); ahc_outb(ahc, SCSISEQ, ahc_inb(ahc, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP)); if (initiate_reset) ahc_reset_current_bus(ahc); ahc_clear_intstat(ahc); ahc_outb(ahc, SBLKCTL, sblkctl); restart_needed = FALSE; } else { /* Case 2: A command from this bus is active or we're idle */ ahc_clear_msg_state(ahc); ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE); ahc_outb(ahc, SCSISEQ, ahc_inb(ahc, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP)); if (initiate_reset) ahc_reset_current_bus(ahc); ahc_clear_intstat(ahc); /* * Since we are going to restart the sequencer, avoid * a race in the sequencer that could cause corruption * of our Q pointers by starting over from index 0. */ ahc->qoutfifonext = 0; if ((ahc->features & AHC_QUEUE_REGS) != 0) ahc_outb(ahc, SDSCB_QOFF, 0); else ahc_outb(ahc, QOUTPOS, 0); restart_needed = TRUE; } /* * Clean up all the state information for the * pending transactions on this bus. */ found = ahc_abort_scbs(ahc, AHC_TARGET_WILDCARD, channel, AHC_LUN_WILDCARD, SCB_LIST_NULL, ROLE_UNKNOWN, XS_RESET); if (channel == 'B') { our_id = ahc->our_id_b; } else { our_id = ahc->our_id; } max_scsiid = (ahc->features & AHC_WIDE) ? 15 : 7; /* * Revert to async/narrow transfers until we renegotiate. */ for (target = 0; target <= max_scsiid; target++) { if (ahc->enabled_targets[target] == NULL) continue; for (initiator = 0; initiator <= max_scsiid; initiator++) { struct ahc_devinfo devinfo; ahc_compile_devinfo(&devinfo, target, initiator, AHC_LUN_WILDCARD, channel, ROLE_UNKNOWN); ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, AHC_TRANS_CUR, /*paused*/TRUE, FALSE); ahc_set_syncrate(ahc, &devinfo, /*syncrate*/NULL, /*period*/0, /*offset*/0, AHC_TRANS_CUR, /*paused*/TRUE, FALSE); } } if (restart_needed) restart_sequencer(ahc); else unpause_sequencer(ahc); return found; } static int ahc_match_scb(struct scb *scb, int target, char channel, int lun, u_int tag, role_t role) { int targ = SCB_TARGET(scb); char chan = SCB_CHANNEL(scb); int slun = SCB_LUN(scb); int match; match = ((chan == channel) || (channel == ALL_CHANNELS)); if (match != 0) match = ((targ == target) || (target == AHC_TARGET_WILDCARD)); if (match != 0) match = ((lun == slun) || (lun == AHC_LUN_WILDCARD)); return match; } static void ahc_construct_sdtr(struct ahc_softc *ahc, u_int period, u_int offset) { ahc->msgout_buf[ahc->msgout_index++] = MSG_EXTENDED; ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_SDTR_LEN; ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_SDTR; ahc->msgout_buf[ahc->msgout_index++] = period; ahc->msgout_buf[ahc->msgout_index++] = offset; ahc->msgout_len += 5; } static void ahc_construct_wdtr(struct ahc_softc *ahc, u_int bus_width) { ahc->msgout_buf[ahc->msgout_index++] = MSG_EXTENDED; ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_WDTR_LEN; ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_WDTR; ahc->msgout_buf[ahc->msgout_index++] = bus_width; ahc->msgout_len += 4; } static void ahc_calc_residual(struct scb *scb) { struct hardware_scb *hscb; hscb = scb->hscb; /* * If the disconnected flag is still set, this is bogus * residual information left over from a sequencer * pagin/pageout, so ignore this case. */ if ((scb->hscb->control & DISCONNECTED) == 0) { u_int32_t resid; int resid_sgs; int sg; /* * Remainder of the SG where the transfer * stopped. */ resid = (hscb->residual_data_count[2] << 16) | (hscb->residual_data_count[1] <<8) | (hscb->residual_data_count[0]); /* * Add up the contents of all residual * SG segments that are after the SG where * the transfer stopped. */ resid_sgs = scb->hscb->residual_SG_count - 1/*current*/; sg = scb->sg_count - resid_sgs; while (resid_sgs > 0) { resid += le32toh(scb->sg_list[sg].len); sg++; resid_sgs--; } scb->xs->resid = resid; } /* * Clean out the residual information in this SCB for its * next consumer. */ hscb->residual_SG_count = 0; #ifdef AHC_DEBUG if (ahc_debug & AHC_SHOWMISC) { scsi_print_addr(scb->xs->sc_link); printf("Handled Residual of %ld bytes\n" ,(long)scb->xs->resid); } #endif } static void ahc_update_pending_syncrates(struct ahc_softc *ahc) { struct scb *scb; int pending_ccb_count; int i; u_int saved_scbptr; /* * Traverse the pending SCB list and ensure that all of the * SCBs there have the proper settings. */ scb = LIST_FIRST(&ahc->pending_ccbs); pending_ccb_count = 0; while (scb != NULL) { struct ahc_devinfo devinfo; struct scsipi_xfer *xs; struct scb *pending_scb; struct hardware_scb *pending_hscb; struct ahc_initiator_tinfo *tinfo; struct tmode_tstate *tstate; u_int our_id, remote_id; xs = scb->xs; pending_scb = scb; pending_hscb = pending_scb->hscb; our_id = SCB_IS_SCSIBUS_B(pending_scb) ? ahc->our_id_b : ahc->our_id; remote_id = xs->sc_link->scsipi_scsi.target; ahc_compile_devinfo(&devinfo, our_id, remote_id, SCB_LUN(pending_scb), SCB_CHANNEL(pending_scb), ROLE_UNKNOWN); tinfo = ahc_fetch_transinfo(ahc, devinfo.channel, our_id, remote_id, &tstate); pending_hscb->control &= ~ULTRAENB; if ((tstate->ultraenb & devinfo.target_mask) != 0) pending_hscb->control |= ULTRAENB; pending_hscb->scsirate = tinfo->scsirate; pending_hscb->scsioffset = tinfo->current.offset; pending_ccb_count++; scb = LIST_NEXT(scb, plinks); } if (pending_ccb_count == 0) return; saved_scbptr = ahc_inb(ahc, SCBPTR); /* Ensure that the hscbs down on the card match the new information */ for (i = 0; i < ahc->scb_data->maxhscbs; i++) { u_int scb_tag; ahc_outb(ahc, SCBPTR, i); scb_tag = ahc_inb(ahc, SCB_TAG); if (scb_tag != SCB_LIST_NULL) { struct ahc_devinfo devinfo; struct scb *pending_scb; struct scsipi_xfer *xs; struct hardware_scb *pending_hscb; struct ahc_initiator_tinfo *tinfo; struct tmode_tstate *tstate; u_int our_id, remote_id; u_int control; pending_scb = &ahc->scb_data->scbarray[scb_tag]; if (pending_scb->flags == SCB_FREE) continue; pending_hscb = pending_scb->hscb; xs = pending_scb->xs; our_id = SCB_IS_SCSIBUS_B(pending_scb) ? ahc->our_id_b : ahc->our_id; remote_id = xs->sc_link->scsipi_scsi.target; ahc_compile_devinfo(&devinfo, our_id, remote_id, SCB_LUN(pending_scb), SCB_CHANNEL(pending_scb), ROLE_UNKNOWN); tinfo = ahc_fetch_transinfo(ahc, devinfo.channel, our_id, remote_id, &tstate); control = ahc_inb(ahc, SCB_CONTROL); control &= ~ULTRAENB; if ((tstate->ultraenb & devinfo.target_mask) != 0) control |= ULTRAENB; ahc_outb(ahc, SCB_CONTROL, control); ahc_outb(ahc, SCB_SCSIRATE, tinfo->scsirate); ahc_outb(ahc, SCB_SCSIOFFSET, tinfo->current.offset); } } ahc_outb(ahc, SCBPTR, saved_scbptr); } #if UNUSED static void ahc_dump_targcmd(struct target_cmd *cmd) { u_int8_t *byte; u_int8_t *last_byte; int i; byte = &cmd->initiator_channel; /* Debugging info for received commands */ last_byte = &cmd[1].initiator_channel; i = 0; while (byte < last_byte) { if (i == 0) printf("\t"); printf("%#x", *byte++); i++; if (i == 8) { printf("\n"); i = 0; } else { printf(", "); } } } #endif static void ahc_shutdown(void *arg) { struct ahc_softc *ahc; int i; u_int sxfrctl1_a, sxfrctl1_b; ahc = (struct ahc_softc *)arg; pause_sequencer(ahc); /* * Preserve the value of the SXFRCTL1 register for all channels. * It contains settings that affect termination and we don't want * to disturb the integrity of the bus during shutdown in case * we are in a multi-initiator setup. */ sxfrctl1_b = 0; if ((ahc->features & AHC_TWIN) != 0) { u_int sblkctl; sblkctl = ahc_inb(ahc, SBLKCTL); ahc_outb(ahc, SBLKCTL, sblkctl | SELBUSB); sxfrctl1_b = ahc_inb(ahc, SXFRCTL1); ahc_outb(ahc, SBLKCTL, sblkctl & ~SELBUSB); } sxfrctl1_a = ahc_inb(ahc, SXFRCTL1); /* This will reset most registers to 0, but not all */ ahc_reset(ahc); if ((ahc->features & AHC_TWIN) != 0) { u_int sblkctl; sblkctl = ahc_inb(ahc, SBLKCTL); ahc_outb(ahc, SBLKCTL, sblkctl | SELBUSB); ahc_outb(ahc, SXFRCTL1, sxfrctl1_b); ahc_outb(ahc, SBLKCTL, sblkctl & ~SELBUSB); } ahc_outb(ahc, SXFRCTL1, sxfrctl1_a); ahc_outb(ahc, SCSISEQ, 0); ahc_outb(ahc, SXFRCTL0, 0); ahc_outb(ahc, DSPCISTATUS, 0); for (i = TARG_SCSIRATE; i < HA_274_BIOSCTRL; i++) ahc_outb(ahc, i, 0); } #if defined(AHC_DEBUG) && 0 static void ahc_dumptinfo(struct ahc_softc *ahc, struct ahc_initiator_tinfo *tinfo) { printf("%s: tinfo: rate %u\n", ahc_name(ahc), tinfo->scsirate); printf("\tcurrent:\n"); printf("\t\twidth %u period %u offset %u flags %x\n", tinfo->current.width, tinfo->current.period, tinfo->current.offset, tinfo->current.ppr_flags); printf("\tgoal:\n"); printf("\t\twidth %u period %u offset %u flags %x\n", tinfo->goal.width, tinfo->goal.period, tinfo->goal.offset, tinfo->goal.ppr_flags); printf("\tuser:\n"); printf("\t\twidth %u period %u offset %u flags %x\n", tinfo->user.width, tinfo->user.period, tinfo->user.offset, tinfo->user.ppr_flags); } #endif static void ahc_check_tags(struct ahc_softc *ahc, struct scsipi_xfer *xs) { struct scsipi_inquiry_data *inq; struct ahc_devinfo devinfo; int target_id, our_id; if (xs->cmd->opcode != INQUIRY || xs->error != XS_NOERROR) return; target_id = xs->sc_link->scsipi_scsi.target; our_id = SIM_SCSI_ID(ahc, xs->sc_link); /* * Sneak a look at the results of the SCSI Inquiry * command and see if we can do Tagged queing. This * should really be done by the higher level drivers. */ inq = (struct scsipi_inquiry_data *)xs->data; if ((inq->flags & SID_CmdQue) && !(ahc_istagged_device(ahc, xs))) { printf("%s: target %d using tagged queuing\n", ahc_name(ahc), xs->sc_link->scsipi_scsi.target); ahc_compile_devinfo(&devinfo, our_id, target_id, xs->sc_link->scsipi_scsi.lun, SIM_CHANNEL(ahc, xs->sc_link), ROLE_INITIATOR); ahc_set_tags(ahc, &devinfo, TRUE); if (ahc->scb_data->maxhscbs >= 16 || (ahc->flags & AHC_PAGESCBS)) { /* Default to 16 tags */ xs->sc_link->openings += 14; } else { /* * Default to 4 tags on whimpy * cards that don't have much SCB * space and can't page. This prevents * a single device from hogging all * slots. We should really have a better * way of providing fairness. */ xs->sc_link->openings += 2; } } } static int ahc_istagged_device(struct ahc_softc *ahc, struct scsipi_xfer *xs) { char channel; u_int our_id, target; struct tmode_tstate *tstate; struct ahc_devinfo devinfo; channel = SIM_CHANNEL(ahc, xs->sc_link); our_id = SIM_SCSI_ID(ahc, xs->sc_link); target = xs->sc_link->scsipi_scsi.target; (void)ahc_fetch_transinfo(ahc, channel, our_id, target, &tstate); ahc_compile_devinfo(&devinfo, our_id, target, xs->sc_link->scsipi_scsi.lun, channel, ROLE_INITIATOR); return (tstate->tagenable & devinfo.target_mask); }