patch-2.4.19 linux-2.4.19/drivers/scsi/aic7xxx/aic7xxx.c
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- Lines: 6989
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
linux-2.4.18/drivers/scsi/aic7xxx/aic7xxx.c
- Orig date:
Thu Oct 25 13:53:48 2001
diff -urN linux-2.4.18/drivers/scsi/aic7xxx/aic7xxx.c linux-2.4.19/drivers/scsi/aic7xxx/aic7xxx.c
@@ -1,6988 +0,0 @@
-/*
- * Core routines and tables shareable across OS platforms.
- *
- * Copyright (c) 1994-2001 Justin T. Gibbs.
- * Copyright (c) 2000-2001 Adaptec Inc.
- * 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. Redistributions in binary form must reproduce at minimum a disclaimer
- * substantially similar to the "NO WARRANTY" disclaimer below
- * ("Disclaimer") and any redistribution must be conditioned upon
- * including a substantially similar Disclaimer requirement for further
- * binary redistribution.
- * 3. Neither the names of the above-listed copyright holders nor the names
- * of any contributors may 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
- * GNU General Public License ("GPL") version 2 as published by the Free
- * Software Foundation.
- *
- * NO WARRANTY
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
- *
- * $Id: //depot/aic7xxx/aic7xxx/aic7xxx.c#50 $
- *
- * $FreeBSD: src/sys/dev/aic7xxx/aic7xxx.c,v 1.61 2000/11/13 03:35:43 gibbs Exp $
- */
-
-#include "aic7xxx_osm.h"
-#include "aic7xxx_inline.h"
-#include "aicasm/aicasm_insformat.h"
-
-/****************************** Softc Data ************************************/
-struct ahc_softc_tailq ahc_tailq = TAILQ_HEAD_INITIALIZER(ahc_tailq);
-
-/***************************** Lookup Tables **********************************/
-char *ahc_chip_names[] =
-{
- "NONE",
- "aic7770",
- "aic7850",
- "aic7855",
- "aic7859",
- "aic7860",
- "aic7870",
- "aic7880",
- "aic7895",
- "aic7895C",
- "aic7890/91",
- "aic7896/97",
- "aic7892",
- "aic7899"
-};
-static const u_int num_chip_names = NUM_ELEMENTS(ahc_chip_names);
-
-/*
- * Hardware error codes.
- */
-struct ahc_hard_error_entry {
- uint8_t errno;
- char *errmesg;
-};
-
-static struct ahc_hard_error_entry ahc_hard_errors[] = {
- { 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 u_int num_errors = NUM_ELEMENTS(ahc_hard_errors);
-
-static struct ahc_phase_table_entry ahc_phase_table[] =
-{
- { P_DATAOUT, MSG_NOOP, "in Data-out phase" },
- { P_DATAIN, MSG_INITIATOR_DET_ERR, "in Data-in phase" },
- { P_DATAOUT_DT, MSG_NOOP, "in DT Data-out phase" },
- { P_DATAIN_DT, MSG_INITIATOR_DET_ERR, "in DT 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" }
-};
-
-/*
- * In most cases we only wish to itterate over real phases, so
- * exclude the last element from the count.
- */
-static const u_int num_phases = NUM_ELEMENTS(ahc_phase_table) - 1;
-
-/*
- * Valid SCSIRATE values. (p. 3-17)
- * Provides a mapping of tranfer periods in ns to the proper value to
- * stick in the scsixfer reg.
- */
-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 }
-};
-
-/* Our Sequencer Program */
-#include "aic7xxx_seq.h"
-
-/**************************** Function Declarations ***************************/
-static void ahc_force_renegotiation(struct ahc_softc *ahc);
-static struct ahc_tmode_tstate*
- ahc_alloc_tstate(struct ahc_softc *ahc,
- u_int scsi_id, char channel);
-#ifdef AHC_TARGET_MODE
-static void ahc_free_tstate(struct ahc_softc *ahc,
- u_int scsi_id, char channel, int force);
-#endif
-static struct ahc_syncrate*
- ahc_devlimited_syncrate(struct ahc_softc *ahc,
- struct ahc_initiator_tinfo *,
- u_int *period,
- u_int *ppr_options,
- role_t role);
-static void ahc_update_pending_scbs(struct ahc_softc *ahc);
-static void ahc_fetch_devinfo(struct ahc_softc *ahc,
- struct ahc_devinfo *devinfo);
-static void ahc_scb_devinfo(struct ahc_softc *ahc,
- struct ahc_devinfo *devinfo,
- struct scb *scb);
-static void ahc_assert_atn(struct ahc_softc *ahc);
-static void ahc_setup_initiator_msgout(struct ahc_softc *ahc,
- struct ahc_devinfo *devinfo,
- struct scb *scb);
-static void ahc_build_transfer_msg(struct ahc_softc *ahc,
- struct ahc_devinfo *devinfo);
-static void ahc_construct_sdtr(struct ahc_softc *ahc,
- struct ahc_devinfo *devinfo,
- u_int period, u_int offset);
-static void ahc_construct_wdtr(struct ahc_softc *ahc,
- struct ahc_devinfo *devinfo,
- u_int bus_width);
-static void ahc_construct_ppr(struct ahc_softc *ahc,
- struct ahc_devinfo *devinfo,
- u_int period, u_int offset,
- u_int bus_width, u_int ppr_options);
-static void ahc_clear_msg_state(struct ahc_softc *ahc);
-static void ahc_handle_message_phase(struct ahc_softc *ahc);
-typedef enum {
- AHCMSG_1B,
- AHCMSG_2B,
- AHCMSG_EXT
-} ahc_msgtype;
-static int ahc_sent_msg(struct ahc_softc *ahc, ahc_msgtype type,
- u_int msgval, int full);
-static int ahc_parse_msg(struct ahc_softc *ahc,
- struct ahc_devinfo *devinfo);
-static int ahc_handle_msg_reject(struct ahc_softc *ahc,
- struct ahc_devinfo *devinfo);
-static void ahc_handle_ign_wide_residue(struct ahc_softc *ahc,
- struct ahc_devinfo *devinfo);
-static void ahc_reinitialize_dataptrs(struct ahc_softc *ahc);
-static void ahc_handle_devreset(struct ahc_softc *ahc,
- struct ahc_devinfo *devinfo,
- cam_status status, char *message,
- int verbose_level);
-#if AHC_TARGET_MODE
-static void ahc_setup_target_msgin(struct ahc_softc *ahc,
- struct ahc_devinfo *devinfo,
- struct scb *scb);
-#endif
-
-static bus_dmamap_callback_t ahc_dmamap_cb;
-static void ahc_build_free_scb_list(struct ahc_softc *ahc);
-static int ahc_init_scbdata(struct ahc_softc *ahc);
-static void ahc_fini_scbdata(struct ahc_softc *ahc);
-static void ahc_qinfifo_requeue(struct ahc_softc *ahc,
- struct scb *prev_scb,
- struct scb *scb);
-static int ahc_qinfifo_count(struct ahc_softc *ahc);
-static u_int ahc_rem_scb_from_disc_list(struct ahc_softc *ahc,
- u_int prev, u_int scbptr);
-static void ahc_add_curscb_to_free_list(struct ahc_softc *ahc);
-static u_int ahc_rem_wscb(struct ahc_softc *ahc,
- u_int scbpos, u_int prev);
-static void ahc_reset_current_bus(struct ahc_softc *ahc);
-#ifdef AHC_DUMP_SEQ
-static void ahc_dumpseq(struct ahc_softc *ahc);
-#endif
-static void ahc_loadseq(struct ahc_softc *ahc);
-static int ahc_check_patch(struct ahc_softc *ahc,
- struct patch **start_patch,
- u_int start_instr, u_int *skip_addr);
-static void ahc_download_instr(struct ahc_softc *ahc,
- u_int instrptr, uint8_t *dconsts);
-#ifdef AHC_TARGET_MODE
-static void ahc_queue_lstate_event(struct ahc_softc *ahc,
- struct ahc_tmode_lstate *lstate,
- u_int initiator_id,
- u_int event_type,
- u_int event_arg);
-static void ahc_update_scsiid(struct ahc_softc *ahc,
- u_int targid_mask);
-static int ahc_handle_target_cmd(struct ahc_softc *ahc,
- struct target_cmd *cmd);
-#endif
-/************************* Sequencer Execution Control ************************/
-/*
- * Restart the sequencer program from address zero
- */
-void
-ahc_restart(struct ahc_softc *ahc)
-{
-
- ahc_pause(ahc);
-
- ahc_outb(ahc, SCSISIGO, 0); /* De-assert BSY */
- ahc_outb(ahc, MSG_OUT, MSG_NOOP); /* No message to send */
- ahc_outb(ahc, SXFRCTL1, ahc_inb(ahc, SXFRCTL1) & ~BITBUCKET);
- ahc_outb(ahc, LASTPHASE, P_BUSFREE);
-
- /*
- * Ensure that the sequencer's idea of TQINPOS
- * matches our own. The sequencer increments TQINPOS
- * only after it sees a DMA complete and a reset could
- * occur before the increment leaving the kernel to believe
- * the command arrived but the sequencer to not.
- */
- ahc_outb(ahc, TQINPOS, ahc->tqinfifonext);
-
- /* Always allow reselection */
- ahc_outb(ahc, SCSISEQ,
- ahc_inb(ahc, SCSISEQ_TEMPLATE) & (ENSELI|ENRSELI|ENAUTOATNP));
- if ((ahc->features & AHC_CMD_CHAN) != 0) {
- /* Ensure that no DMA operations are in progress */
- ahc_outb(ahc, CCSCBCNT, 0);
- ahc_outb(ahc, CCSGCTL, 0);
- ahc_outb(ahc, CCSCBCTL, 0);
- }
- /*
- * If we were in the process of DMA'ing SCB data into
- * an SCB, replace that SCB on the free list. This prevents
- * an SCB leak.
- */
- if ((ahc_inb(ahc, SEQ_FLAGS2) & SCB_DMA) != 0) {
- ahc_add_curscb_to_free_list(ahc);
- ahc_outb(ahc, SEQ_FLAGS2,
- ahc_inb(ahc, SEQ_FLAGS2) & ~SCB_DMA);
- }
- ahc_outb(ahc, MWI_RESIDUAL, 0);
- ahc_outb(ahc, SEQCTL, FASTMODE);
- ahc_outb(ahc, SEQADDR0, 0);
- ahc_outb(ahc, SEQADDR1, 0);
- ahc_unpause(ahc);
-}
-
-/************************* Input/Output Queues ********************************/
-void
-ahc_run_qoutfifo(struct ahc_softc *ahc)
-{
- struct scb *scb;
- u_int scb_index;
-
- ahc_sync_qoutfifo(ahc, BUS_DMASYNC_POSTREAD);
- while (ahc->qoutfifo[ahc->qoutfifonext] != SCB_LIST_NULL) {
-
- scb_index = ahc->qoutfifo[ahc->qoutfifonext];
- if ((ahc->qoutfifonext & 0x03) == 0x03) {
- u_int modnext;
-
- /*
- * Clear 32bits of QOUTFIFO at a time
- * so that we don't clobber an incoming
- * byte DMA to the array on architectures
- * that only support 32bit load and store
- * operations.
- */
- modnext = ahc->qoutfifonext & ~0x3;
- *((uint32_t *)(&ahc->qoutfifo[modnext])) = 0xFFFFFFFFUL;
- ahc_dmamap_sync(ahc, ahc->shared_data_dmat,
- ahc->shared_data_dmamap,
- /*offset*/modnext, /*len*/4,
- BUS_DMASYNC_PREREAD);
- }
- ahc->qoutfifonext++;
-
- scb = ahc_lookup_scb(ahc, scb_index);
- if (scb == NULL) {
- 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.
- */
- ahc_update_residual(scb);
- ahc_done(ahc, scb);
- }
-}
-
-void
-ahc_run_untagged_queues(struct ahc_softc *ahc)
-{
- int i;
-
- for (i = 0; i < 16; i++)
- ahc_run_untagged_queue(ahc, &ahc->untagged_queues[i]);
-}
-
-void
-ahc_run_untagged_queue(struct ahc_softc *ahc, struct scb_tailq *queue)
-{
- struct scb *scb;
-
- if (ahc->untagged_queue_lock != 0)
- return;
-
- if ((scb = TAILQ_FIRST(queue)) != NULL
- && (scb->flags & SCB_ACTIVE) == 0) {
- scb->flags |= SCB_ACTIVE;
- ahc_queue_scb(ahc, scb);
- }
-}
-
-/************************* Interrupt Handling *********************************/
-void
-ahc_handle_brkadrint(struct ahc_softc *ahc)
-{
- /*
- * We upset the sequencer :-(
- * Lookup the error message
- */
- int i;
- int error;
-
- error = ahc_inb(ahc, ERROR);
- for (i = 0; error != 1 && i < num_errors; i++)
- error >>= 1;
- printf("%s: brkadrint, %s at seqaddr = 0x%x\n",
- ahc_name(ahc), ahc_hard_errors[i].errmesg,
- ahc_inb(ahc, SEQADDR0) |
- (ahc_inb(ahc, SEQADDR1) << 8));
-
- ahc_dump_card_state(ahc);
-
- /* Tell everyone that this HBA is no longer availible */
- ahc_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
- CAM_LUN_WILDCARD, SCB_LIST_NULL, ROLE_UNKNOWN,
- CAM_NO_HBA);
-
- /* Disable all interrupt sources by resetting the controller */
- ahc_shutdown(ahc);
-}
-
-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 BAD_STATUS:
- {
- u_int scb_index;
- struct hardware_scb *hscb;
-
- /*
- * 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);
-
- /*
- * 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_lookup_scb(ahc, scb_index);
- if (scb == NULL) {
- 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);
- ahc_dump_card_state(ahc);
- panic("for safety");
- goto unpause;
- }
-
- hscb = scb->hscb;
-
- /* 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;
- ahc_set_transaction_status(scb, CAM_AUTOSENSE_FAIL);
- break;
- }
- ahc_set_transaction_status(scb, CAM_SCSI_STATUS_ERROR);
- /* Freeze the queue until the client sees the error. */
- ahc_freeze_devq(ahc, scb);
- ahc_freeze_scb(scb);
- ahc_set_scsi_status(scb, hscb->shared_data.status.scsi_status);
- switch (hscb->shared_data.status.scsi_status) {
- case SCSI_STATUS_OK:
- printf("%s: Interrupted for staus of 0???\n",
- ahc_name(ahc));
- break;
- case SCSI_STATUS_CMD_TERMINATED:
- case SCSI_STATUS_CHECK_COND:
- {
- struct ahc_dma_seg *sg;
- struct scsi_sense *sc;
- struct ahc_initiator_tinfo *targ_info;
- struct ahc_tmode_tstate *tstate;
- struct ahc_transinfo *tinfo;
-#ifdef AHC_DEBUG
- if (ahc_debug & AHC_SHOWSENSE) {
- ahc_print_path(ahc, scb);
- printf("SCB %d: requests Check Status\n",
- scb->hscb->tag);
- }
-#endif
-
- if (ahc_perform_autosense(scb) == 0)
- break;
-
- targ_info = ahc_fetch_transinfo(ahc,
- devinfo.channel,
- devinfo.our_scsiid,
- devinfo.target,
- &tstate);
- tinfo = &targ_info->curr;
- sg = scb->sg_list;
- sc = (struct scsi_sense *)(&hscb->shared_data.cdb);
- /*
- * Save off the residual if there is one.
- */
- ahc_update_residual(scb);
-#ifdef AHC_DEBUG
- if (ahc_debug & AHC_SHOWSENSE) {
- ahc_print_path(ahc, scb);
- printf("Sending Sense\n");
- }
-#endif
- sg->addr = ahc_get_sense_bufaddr(ahc, scb);
- sg->len = ahc_get_sense_bufsize(ahc, scb);
- sg->len |= AHC_DMA_LAST_SEG;
-
- /* Fixup byte order */
- sg->addr = ahc_htole32(sg->addr);
- sg->len = ahc_htole32(sg->len);
-
- sc->opcode = REQUEST_SENSE;
- sc->byte2 = 0;
- if (tinfo->protocol_version <= SCSI_REV_2
- && SCB_GET_LUN(scb) < 8)
- sc->byte2 = SCB_GET_LUN(scb) << 5;
- sc->unused[0] = 0;
- sc->unused[1] = 0;
- sc->length = sg->len;
- sc->control = 0;
-
- /*
- * We can't allow the target to disconnect.
- * This will be an untagged transaction and
- * having the target disconnect will make this
- * transaction indestinguishable from outstanding
- * tagged transactions.
- */
- 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.
- */
- if (ahc_get_residual(scb)
- == ahc_get_transfer_length(scb)) {
- ahc_update_neg_request(ahc, &devinfo,
- tstate, targ_info,
- /*force*/TRUE);
- }
- if (tstate->auto_negotiate & devinfo.target_mask) {
- hscb->control |= MK_MESSAGE;
- scb->flags &= ~SCB_NEGOTIATE;
- scb->flags |= SCB_AUTO_NEGOTIATE;
- }
- hscb->cdb_len = sizeof(*sc);
- hscb->dataptr = sg->addr;
- hscb->datacnt = sg->len;
- hscb->sgptr = scb->sg_list_phys | SG_FULL_RESID;
- hscb->sgptr = ahc_htole32(hscb->sgptr);
- scb->sg_count = 1;
- scb->flags |= SCB_SENSE;
- ahc_qinfifo_requeue_tail(ahc, scb);
- ahc_outb(ahc, RETURN_1, SEND_SENSE);
-#ifdef __FreeBSD__
- /*
- * Ensure we have enough time to actually
- * retrieve the sense.
- */
- untimeout(ahc_timeout, (caddr_t)scb,
- scb->io_ctx->ccb_h.timeout_ch);
- scb->io_ctx->ccb_h.timeout_ch =
- timeout(ahc_timeout, (caddr_t)scb, 5 * hz);
-#endif
- break;
- }
- default:
- break;
- }
- break;
- }
- 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_SCSIID == 0x%x, SAVED_LUN == 0x%x, "
- "ARG_1 == 0x%x ACCUM = 0x%x\n",
- ahc_inb(ahc, SAVED_SCSIID), ahc_inb(ahc, SAVED_LUN),
- ahc_inb(ahc, ARG_1), ahc_inb(ahc, ACCUM));
- printf("SEQ_FLAGS == 0x%x, SCBPTR == 0x%x, BTT == 0x%x, "
- "SINDEX == 0x%x\n",
- ahc_inb(ahc, SEQ_FLAGS), ahc_inb(ahc, SCBPTR),
- ahc_index_busy_tcl(ahc,
- BUILD_TCL(ahc_inb(ahc, SAVED_SCSIID),
- ahc_inb(ahc, SAVED_LUN))),
- ahc_inb(ahc, SINDEX));
- printf("SCSIID == 0x%x, SCB_SCSIID == 0x%x, SCB_LUN == 0x%x, "
- "SCB_TAG == 0x%x, SCB_CONTROL == 0x%x\n",
- ahc_inb(ahc, SCSIID), ahc_inb(ahc, SCB_SCSIID),
- ahc_inb(ahc, SCB_LUN), ahc_inb(ahc, SCB_TAG),
- ahc_inb(ahc, SCB_CONTROL));
- printf("SCSIBUSL == 0x%x, SCSISIGI == 0x%x\n",
- ahc_inb(ahc, SCSIBUSL), ahc_inb(ahc, SCSISIGI));
- printf("SXFRCTL0 == 0x%x\n", ahc_inb(ahc, SXFRCTL0));
- printf("SEQCTL == 0x%x\n", ahc_inb(ahc, SEQCTL));
- ahc_dump_card_state(ahc);
- 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_assert_atn(ahc);
- 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 an 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_SCSIID == 0x%x\n",
- ahc_name(ahc), devinfo.channel, devinfo.target,
- ahc_inb(ahc, LASTPHASE), ahc_inb(ahc, SAVED_SCSIID));
- 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 IGN_WIDE_RES:
- ahc_handle_ign_wide_residue(ahc, &devinfo);
- break;
- case PDATA_REINIT:
- ahc_reinitialize_dataptrs(ahc);
- break;
- case BAD_PHASE:
- {
- u_int lastphase;
-
- lastphase = ahc_inb(ahc, LASTPHASE);
- printf("%s:%c:%d: unknown scsi bus phase %x, "
- "lastphase = 0x%x. Attempting to continue\n",
- ahc_name(ahc), devinfo.channel, devinfo.target,
- lastphase, ahc_inb(ahc, SCSISIGI));
- break;
- }
- case MISSED_BUSFREE:
- {
- u_int lastphase;
-
- lastphase = ahc_inb(ahc, LASTPHASE);
- printf("%s:%c:%d: Missed busfree. "
- "Lastphase = 0x%x, Curphase = 0x%x\n",
- ahc_name(ahc), devinfo.channel, devinfo.target,
- lastphase, ahc_inb(ahc, SCSISIGI));
- ahc_restart(ahc);
- return;
- }
- 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 phase changes.
- *
- * If this is the first time we've seen a HOST_MSG_LOOP
- * interrupt, initialize the state of the host message
- * loop.
- */
- if (ahc->msg_type == MSG_TYPE_NONE) {
- struct scb *scb;
- u_int scb_index;
- 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);
- ahc_restart(ahc);
- return;
- }
-
- scb_index = ahc_inb(ahc, SCB_TAG);
- scb = ahc_lookup_scb(ahc, scb_index);
- if (devinfo.role == ROLE_INITIATOR) {
- if (scb == NULL)
- panic("HOST_MSG_LOOP with "
- "invalid SCB %x\n", 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;
- }
- }
-#if AHC_TARGET_MODE
- else {
- if (bus_phase == P_MESGOUT) {
- ahc->msg_type =
- MSG_TYPE_TARGET_MSGOUT;
- ahc->msgin_index = 0;
- }
- else
- ahc_setup_target_msgin(ahc,
- &devinfo,
- scb);
- }
-#endif
- }
-
- ahc_handle_message_phase(ahc);
- 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) {
-
- if ((ahc->features & AHC_DT) == 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);
- u_int i;
-
- scb = ahc_lookup_scb(ahc, scbindex);
- for (i = 0; i < num_phases; i++) {
- if (lastphase == ahc_phase_table[i].phase)
- break;
- }
- ahc_print_path(ahc, scb);
- printf("data overrun detected %s."
- " Tag == 0x%x.\n",
- ahc_phase_table[i].phasemsg,
- scb->hscb->tag);
- ahc_print_path(ahc, scb);
- printf("%s seen Data Phase. Length = %ld. NumSGs = %d.\n",
- ahc_inb(ahc, SEQ_FLAGS) & DPHASE ? "Have" : "Haven't",
- ahc_get_transfer_length(scb), scb->sg_count);
- if (scb->sg_count > 0) {
- for (i = 0; i < scb->sg_count; i++) {
-
- printf("sg[%d] - Addr 0x%x%x : Length %d\n",
- i,
- (ahc_le32toh(scb->sg_list[i].len) >> 24
- & SG_HIGH_ADDR_BITS),
- ahc_le32toh(scb->sg_list[i].addr),
- ahc_le32toh(scb->sg_list[i].len)
- & AHC_SG_LEN_MASK);
- }
- }
- /*
- * Set this and it will take effect when the
- * target does a command complete.
- */
- ahc_freeze_devq(ahc, scb);
- ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
- ahc_freeze_scb(scb);
-
- if ((ahc->features & AHC_ULTRA2) != 0) {
- /*
- * Clear the channel in case we return
- * to data phase later.
- */
- ahc_outb(ahc, SXFRCTL0,
- ahc_inb(ahc, SXFRCTL0) | CLRSTCNT|CLRCHN);
- ahc_outb(ahc, SXFRCTL0,
- ahc_inb(ahc, SXFRCTL0) | CLRSTCNT|CLRCHN);
- }
- if ((ahc->flags & AHC_39BIT_ADDRESSING) != 0) {
- u_int dscommand1;
-
- /* Ensure HHADDR is 0 for future DMA operations. */
- dscommand1 = ahc_inb(ahc, DSCOMMAND1);
- ahc_outb(ahc, DSCOMMAND1, dscommand1 | HADDLDSEL0);
- ahc_outb(ahc, HADDR, 0);
- ahc_outb(ahc, DSCOMMAND1, dscommand1);
- }
- break;
- }
- case MKMSG_FAILED:
- {
- u_int scbindex;
-
- printf("%s:%c:%d:%d: Attempt to issue message failed\n",
- ahc_name(ahc), devinfo.channel, devinfo.target,
- devinfo.lun);
- scbindex = ahc_inb(ahc, SCB_TAG);
- scb = ahc_lookup_scb(ahc, scbindex);
- if (scb != NULL
- && (scb->flags & SCB_RECOVERY_SCB) != 0)
- /*
- * Ensure that we didn't put a second instance of this
- * SCB into the QINFIFO.
- */
- ahc_search_qinfifo(ahc, SCB_GET_TARGET(ahc, scb),
- SCB_GET_CHANNEL(ahc, scb),
- SCB_GET_LUN(scb), scb->hscb->tag,
- ROLE_INITIATOR, /*status*/0,
- SEARCH_REMOVE);
- break;
- }
- case NO_FREE_SCB:
- {
- printf("%s: No free or disconnected SCBs\n", ahc_name(ahc));
- ahc_dump_card_state(ahc);
- panic("for safety");
- break;
- }
- case SCB_MISMATCH:
- {
- u_int scbptr;
-
- scbptr = ahc_inb(ahc, SCBPTR);
- printf("Bogus TAG after DMA. SCBPTR %d, tag %d, our tag %d\n",
- scbptr, ahc_inb(ahc, ARG_1),
- ahc->scb_data->hscbs[scbptr].tag);
- ahc_dump_card_state(ahc);
- panic("for saftey");
- break;
- }
- case OUT_OF_RANGE:
- {
- printf("%s: BTT calculation out of range\n", ahc_name(ahc));
- printf("SAVED_SCSIID == 0x%x, SAVED_LUN == 0x%x, "
- "ARG_1 == 0x%x ACCUM = 0x%x\n",
- ahc_inb(ahc, SAVED_SCSIID), ahc_inb(ahc, SAVED_LUN),
- ahc_inb(ahc, ARG_1), ahc_inb(ahc, ACCUM));
- printf("SEQ_FLAGS == 0x%x, SCBPTR == 0x%x, BTT == 0x%x, "
- "SINDEX == 0x%x\n, A == 0x%x\n",
- ahc_inb(ahc, SEQ_FLAGS), ahc_inb(ahc, SCBPTR),
- ahc_index_busy_tcl(ahc,
- BUILD_TCL(ahc_inb(ahc, SAVED_SCSIID),
- ahc_inb(ahc, SAVED_LUN))),
- ahc_inb(ahc, SINDEX),
- ahc_inb(ahc, ACCUM));
- printf("SCSIID == 0x%x, SCB_SCSIID == 0x%x, SCB_LUN == 0x%x, "
- "SCB_TAG == 0x%x, SCB_CONTROL == 0x%x\n",
- ahc_inb(ahc, SCSIID), ahc_inb(ahc, SCB_SCSIID),
- ahc_inb(ahc, SCB_LUN), ahc_inb(ahc, SCB_TAG),
- ahc_inb(ahc, SCB_CONTROL));
- printf("SCSIBUSL == 0x%x, SCSISIGI == 0x%x\n",
- ahc_inb(ahc, SCSIBUSL), ahc_inb(ahc, SCSISIGI));
- ahc_dump_card_state(ahc);
- panic("for safety");
- break;
- }
- 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.
- */
- ahc_unpause(ahc);
-}
-
-void
-ahc_handle_scsiint(struct ahc_softc *ahc, u_int intstat)
-{
- u_int scb_index;
- u_int status0;
- u_int status;
- struct scb *scb;
- char cur_channel;
- char intr_channel;
-
- /* Make sure the sequencer is in a safe location. */
- ahc_clear_critical_section(ahc);
-
- if ((ahc->features & AHC_TWIN) != 0
- && ((ahc_inb(ahc, SBLKCTL) & SELBUSB) != 0))
- cur_channel = 'B';
- else
- cur_channel = 'A';
- intr_channel = cur_channel;
-
- if ((ahc->features & AHC_ULTRA2) != 0)
- status0 = ahc_inb(ahc, SSTAT0) & IOERR;
- else
- status0 = 0;
- status = ahc_inb(ahc, SSTAT1) & (SELTO|SCSIRSTI|BUSFREE|SCSIPERR);
- if (status == 0 && status0 == 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)
- & (SELTO|SCSIRSTI|BUSFREE|SCSIPERR);
- intr_channel = (cur_channel == 'A') ? 'B' : 'A';
- }
- if (status == 0) {
- printf("%s: Spurious SCSI interrupt\n", ahc_name(ahc));
- ahc_outb(ahc, CLRINT, CLRSCSIINT);
- ahc_unpause(ahc);
- return;
- }
- }
-
- scb_index = ahc_inb(ahc, SCB_TAG);
- scb = ahc_lookup_scb(ahc, scb_index);
- if (scb != NULL
- && (ahc_inb(ahc, SEQ_FLAGS) & IDENTIFY_SEEN) == 0)
- scb = NULL;
-
- if ((ahc->features & AHC_ULTRA2) != 0
- && (status0 & IOERR) != 0) {
- int now_lvd;
-
- now_lvd = ahc_inb(ahc, SBLKCTL) & ENAB40;
- printf("%s: Transceiver State Has Changed to %s mode\n",
- ahc_name(ahc), now_lvd ? "LVD" : "SE");
- ahc_outb(ahc, CLRSINT0, CLRIOERR);
- /*
- * When transitioning to SE mode, the reset line
- * glitches, triggering an arbitration bug in some
- * Ultra2 controllers. This bug is cleared when we
- * assert the reset line. Since a reset glitch has
- * already occurred with this transition and a
- * transceiver state change is handled just like
- * a bus reset anyway, asserting the reset line
- * ourselves is safe.
- */
- ahc_reset_channel(ahc, intr_channel,
- /*Initiate Reset*/now_lvd == 0);
- } else if ((status & SCSIRSTI) != 0) {
- printf("%s: Someone reset channel %c\n",
- ahc_name(ahc), intr_channel);
- if (intr_channel != cur_channel)
- ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) ^ SELBUSB);
- 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;
- u_int scsirate;
- u_int i;
- u_int sstat2;
-
- lastphase = ahc_inb(ahc, LASTPHASE);
- curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
- sstat2 = ahc_inb(ahc, SSTAT2);
- 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 || curphase == P_DATAIN_DT)
- errorphase = curphase;
- else
- errorphase = lastphase;
-
- for (i = 0; i < num_phases; i++) {
- if (errorphase == ahc_phase_table[i].phase)
- break;
- }
- mesg_out = ahc_phase_table[i].mesg_out;
- if (scb != NULL)
- ahc_print_path(ahc, scb);
- else
- printf("%s:%c:%d: ", ahc_name(ahc), intr_channel,
- SCSIID_TARGET(ahc, ahc_inb(ahc, SAVED_SCSIID)));
- scsirate = ahc_inb(ahc, SCSIRATE);
- printf("parity error detected %s. "
- "SEQADDR(0x%x) SCSIRATE(0x%x)\n",
- ahc_phase_table[i].phasemsg,
- ahc_inb(ahc, SEQADDR0) | (ahc_inb(ahc, SEQADDR1) << 8),
- scsirate);
-
- if ((ahc->features & AHC_DT) != 0) {
-
- if ((sstat2 & CRCVALERR) != 0)
- printf("\tCRC Value Mismatch\n");
- if ((sstat2 & CRCENDERR) != 0)
- printf("\tNo terminal CRC packet recevied\n");
- if ((sstat2 & CRCREQERR) != 0)
- printf("\tIllegal CRC packet request\n");
- if ((sstat2 & DUAL_EDGE_ERR) != 0)
- printf("\tUnexpected %sDT Data Phase\n",
- (scsirate & SINGLE_EDGE) ? "" : "non-");
- }
-
- /*
- * 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);
- }
- /*
- * Force a renegotiation with this target just in
- * case we are out of sync for some external reason
- * unknown (or unreported) by the target.
- */
- ahc_force_renegotiation(ahc);
- ahc_outb(ahc, CLRINT, CLRSCSIINT);
- ahc_unpause(ahc);
- } else if ((status & SELTO) != 0) {
- u_int scbptr;
-
- /* Stop the selection */
- ahc_outb(ahc, SCSISEQ, 0);
-
- /* No more pending messages */
- ahc_clear_msg_state(ahc);
-
- /* Clear interrupt state */
- ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE);
- ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRBUSFREE|CLRSCSIPERR);
-
- /*
- * Although the driver does not care about the
- * 'Selection in Progress' status bit, the busy
- * LED does. SELINGO is only cleared by a sucessfull
- * selection, so we must manually clear it to insure
- * the LED turns off just incase no future successful
- * selections occur (e.g. no devices on the bus).
- */
- ahc_outb(ahc, CLRSINT0, CLRSELINGO);
-
- scbptr = ahc_inb(ahc, WAITING_SCBH);
- ahc_outb(ahc, SCBPTR, scbptr);
- scb_index = ahc_inb(ahc, SCB_TAG);
-
- scb = ahc_lookup_scb(ahc, scb_index);
- if (scb == NULL) {
- printf("%s: ahc_intr - referenced scb not "
- "valid during SELTO scb(%d, %d)\n",
- ahc_name(ahc), scbptr, scb_index);
- } else {
- ahc_set_transaction_status(scb, CAM_SEL_TIMEOUT);
- ahc_freeze_devq(ahc, scb);
- }
- ahc_outb(ahc, CLRINT, CLRSCSIINT);
- /*
- * Force a renegotiation with this target just in
- * case the cable was pulled and will later be
- * re-attached. The target may forget its negotiation
- * settings with us should it attempt to reselect
- * during the interruption. The target will not issue
- * a unit attention in this case, so we must always
- * renegotiate.
- */
- ahc_force_renegotiation(ahc);
- ahc_restart(ahc);
- } else if ((status & BUSFREE) != 0
- && (ahc_inb(ahc, SIMODE1) & ENBUSFREE) != 0) {
- u_int lastphase;
- u_int saved_scsiid;
- u_int saved_lun;
- u_int target;
- u_int initiator_role_id;
- char channel;
- int printerror;
-
- /*
- * Clear our selection hardware as soon as possible.
- * We may have an entry in the waiting Q for this target,
- * that is affected by this busfree and we don't want to
- * go about selecting the target while we handle the event.
- */
- ahc_outb(ahc, SCSISEQ,
- ahc_inb(ahc, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP));
-
- /*
- * Disable busfree interrupts and clear the busfree
- * interrupt status. We do this here so that several
- * bus transactions occur prior to clearing the SCSIINT
- * latch. It can take a bit for the clearing to take effect.
- */
- ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE);
- ahc_outb(ahc, CLRSINT1, CLRBUSFREE|CLRSCSIPERR);
-
- /*
- * 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.
- */
- lastphase = ahc_inb(ahc, LASTPHASE);
- saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
- saved_lun = ahc_inb(ahc, SAVED_LUN);
- target = SCSIID_TARGET(ahc, saved_scsiid);
- initiator_role_id = SCSIID_OUR_ID(saved_scsiid);
- channel = SCSIID_CHANNEL(ahc, saved_scsiid);
- printerror = 1;
-
- if (lastphase == P_MESGOUT) {
- struct ahc_devinfo devinfo;
- u_int tag;
-
- ahc_fetch_devinfo(ahc, &devinfo);
- tag = SCB_LIST_NULL;
- if (ahc_sent_msg(ahc, AHCMSG_1B, MSG_ABORT_TAG, TRUE)
- || ahc_sent_msg(ahc, AHCMSG_1B, MSG_ABORT, TRUE)) {
- if (ahc->msgout_buf[ahc->msgout_index - 1]
- == MSG_ABORT_TAG)
- tag = scb->hscb->tag;
- ahc_print_path(ahc, scb);
- printf("SCB %d - Abort%s Completed.\n",
- scb->hscb->tag, tag == SCB_LIST_NULL ?
- "" : " Tag");
- ahc_abort_scbs(ahc, target, channel,
- saved_lun, tag,
- ROLE_INITIATOR,
- CAM_REQ_ABORTED);
- printerror = 0;
- } else if (ahc_sent_msg(ahc, AHCMSG_1B,
- MSG_BUS_DEV_RESET, TRUE)) {
-#ifdef __FreeBSD__
- /*
- * Don't mark the user's request for this BDR
- * as completing with CAM_BDR_SENT. CAM3
- * specifies CAM_REQ_CMP.
- */
- if (scb != NULL
- && scb->io_ctx->ccb_h.func_code== XPT_RESET_DEV
- && ahc_match_scb(ahc, scb, target, channel,
- CAM_LUN_WILDCARD,
- SCB_LIST_NULL,
- ROLE_INITIATOR)) {
- ahc_set_transaction_status(scb, CAM_REQ_CMP);
- }
-#endif
- ahc_compile_devinfo(&devinfo,
- initiator_role_id,
- target,
- CAM_LUN_WILDCARD,
- channel,
- ROLE_INITIATOR);
- ahc_handle_devreset(ahc, &devinfo,
- CAM_BDR_SENT,
- "Bus Device Reset",
- /*verbose_level*/0);
- printerror = 0;
- } else if (ahc_sent_msg(ahc, AHCMSG_EXT,
- MSG_EXT_PPR, FALSE)) {
- struct ahc_initiator_tinfo *tinfo;
- struct ahc_tmode_tstate *tstate;
-
- /*
- * PPR Rejected. Try non-ppr negotiation
- * and retry command.
- */
- tinfo = ahc_fetch_transinfo(ahc,
- devinfo.channel,
- devinfo.our_scsiid,
- devinfo.target,
- &tstate);
- tinfo->curr.transport_version = 2;
- tinfo->goal.transport_version = 2;
- tinfo->goal.ppr_options = 0;
- ahc_qinfifo_requeue_tail(ahc, scb);
- printerror = 0;
- } else if (ahc_sent_msg(ahc, AHCMSG_EXT,
- MSG_EXT_WDTR, FALSE)
- || ahc_sent_msg(ahc, AHCMSG_EXT,
- MSG_EXT_SDTR, FALSE)) {
- /*
- * Negotiation Rejected. Go-async and
- * retry command.
- */
- ahc_set_width(ahc, &devinfo,
- MSG_EXT_WDTR_BUS_8_BIT,
- AHC_TRANS_CUR|AHC_TRANS_GOAL,
- /*paused*/TRUE);
- ahc_set_syncrate(ahc, &devinfo,
- /*syncrate*/NULL,
- /*period*/0, /*offset*/0,
- /*ppr_options*/0,
- AHC_TRANS_CUR|AHC_TRANS_GOAL,
- /*paused*/TRUE);
- ahc_qinfifo_requeue_tail(ahc, scb);
- printerror = 0;
- }
- }
- if (printerror != 0) {
- u_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_print_path(ahc, scb);
- ahc_abort_scbs(ahc, target, channel,
- SCB_GET_LUN(scb), tag,
- ROLE_INITIATOR,
- CAM_UNEXP_BUSFREE);
- } 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 == ahc_phase_table[i].phase)
- break;
- }
- printf("Unexpected busfree %s\n"
- "SEQADDR == 0x%x\n",
- ahc_phase_table[i].phasemsg,
- ahc_inb(ahc, SEQADDR0)
- | (ahc_inb(ahc, SEQADDR1) << 8));
- }
- ahc_clear_msg_state(ahc);
- ahc_outb(ahc, CLRINT, CLRSCSIINT);
- ahc_restart(ahc);
- } else {
- printf("%s: Missing case in ahc_handle_scsiint. status = %x\n",
- ahc_name(ahc), status);
- ahc_outb(ahc, CLRINT, CLRSCSIINT);
- }
-}
-
-/*
- * Force renegotiation to occur the next time we initiate
- * a command to the current device.
- */
-static void
-ahc_force_renegotiation(struct ahc_softc *ahc)
-{
- struct ahc_devinfo devinfo;
- struct ahc_initiator_tinfo *targ_info;
- struct ahc_tmode_tstate *tstate;
-
- ahc_fetch_devinfo(ahc, &devinfo);
- targ_info = ahc_fetch_transinfo(ahc,
- devinfo.channel,
- devinfo.our_scsiid,
- devinfo.target,
- &tstate);
- ahc_update_neg_request(ahc, &devinfo, tstate,
- targ_info, /*force*/TRUE);
-}
-
-#define AHC_MAX_STEPS 2000
-void
-ahc_clear_critical_section(struct ahc_softc *ahc)
-{
- int stepping;
- int steps;
- u_int simode0;
- u_int simode1;
-
- if (ahc->num_critical_sections == 0)
- return;
-
- stepping = FALSE;
- steps = 0;
- simode0 = 0;
- simode1 = 0;
- for (;;) {
- struct cs *cs;
- u_int seqaddr;
- u_int i;
-
- seqaddr = ahc_inb(ahc, SEQADDR0)
- | (ahc_inb(ahc, SEQADDR1) << 8);
-
- /*
- * Seqaddr represents the next instruction to execute,
- * so we are really executing the instruction just
- * before it.
- */
- if (seqaddr != 0)
- seqaddr -= 1;
- cs = ahc->critical_sections;
- for (i = 0; i < ahc->num_critical_sections; i++, cs++) {
-
- if (cs->begin < seqaddr && cs->end >= seqaddr)
- break;
- }
-
- if (i == ahc->num_critical_sections)
- break;
-
- if (steps > AHC_MAX_STEPS) {
- printf("%s: Infinite loop in critical section\n",
- ahc_name(ahc));
- ahc_dump_card_state(ahc);
- panic("critical section loop");
- }
-
- steps++;
- if (stepping == FALSE) {
-
- /*
- * Disable all interrupt sources so that the
- * sequencer will not be stuck by a pausing
- * interrupt condition while we attempt to
- * leave a critical section.
- */
- simode0 = ahc_inb(ahc, SIMODE0);
- ahc_outb(ahc, SIMODE0, 0);
- simode1 = ahc_inb(ahc, SIMODE1);
- ahc_outb(ahc, SIMODE1, 0);
- ahc_outb(ahc, CLRINT, CLRSCSIINT);
- ahc_outb(ahc, SEQCTL, ahc_inb(ahc, SEQCTL) | STEP);
- stepping = TRUE;
- }
- ahc_outb(ahc, HCNTRL, ahc->unpause);
- do {
- ahc_delay(200);
- } while (!ahc_is_paused(ahc));
- }
- if (stepping) {
- ahc_outb(ahc, SIMODE0, simode0);
- ahc_outb(ahc, SIMODE1, simode1);
- ahc_outb(ahc, SEQCTL, ahc_inb(ahc, SEQCTL) & ~STEP);
- }
-}
-
-/*
- * Clear any pending interrupt status.
- */
-void
-ahc_clear_intstat(struct ahc_softc *ahc)
-{
- /* Clear any interrupt conditions this may have caused */
- ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRATNO|CLRSCSIRSTI
- |CLRBUSFREE|CLRSCSIPERR|CLRPHASECHG|
- CLRREQINIT);
- ahc_outb(ahc, CLRSINT0, CLRSELDO|CLRSELDI|CLRSELINGO);
- ahc_outb(ahc, CLRINT, CLRSCSIINT);
-}
-
-/**************************** Debugging Routines ******************************/
-void
-ahc_print_scb(struct scb *scb)
-{
- int i;
-
- struct hardware_scb *hscb = scb->hscb;
-
- printf("scb:%p control:0x%x scsiid:0x%x lun:%d cdb_len:%d\n",
- (void *)scb,
- hscb->control,
- hscb->scsiid,
- hscb->lun,
- hscb->cdb_len);
- printf("Shared Data: ");
- for (i = 0; i < sizeof(hscb->shared_data.cdb); i++)
- printf("%#02x", hscb->shared_data.cdb[i]);
- printf(" dataptr:%#x datacnt:%#x sgptr:%#x tag:%#x\n",
- ahc_le32toh(hscb->dataptr),
- ahc_le32toh(hscb->datacnt),
- ahc_le32toh(hscb->sgptr),
- hscb->tag);
- if (scb->sg_count > 0) {
- for (i = 0; i < scb->sg_count; i++) {
- printf("sg[%d] - Addr 0x%x%x : Length %d\n",
- i,
- (ahc_le32toh(scb->sg_list[i].len) >> 24
- & SG_HIGH_ADDR_BITS),
- ahc_le32toh(scb->sg_list[i].addr),
- ahc_le32toh(scb->sg_list[i].len));
- }
- }
-}
-
-/************************* Transfer Negotiation *******************************/
-/*
- * Allocate per target mode instance (ID we respond to as a target)
- * transfer negotiation data structures.
- */
-static struct ahc_tmode_tstate *
-ahc_alloc_tstate(struct ahc_softc *ahc, u_int scsi_id, char channel)
-{
- struct ahc_tmode_tstate *master_tstate;
- struct ahc_tmode_tstate *tstate;
- int i;
-
- 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) {
- memcpy(tstate, master_tstate, sizeof(*tstate));
- memset(tstate->enabled_luns, 0, sizeof(tstate->enabled_luns));
- tstate->ultraenb = 0;
- for (i = 0; i < 16; i++) {
- memset(&tstate->transinfo[i].curr, 0,
- sizeof(tstate->transinfo[i].curr));
- memset(&tstate->transinfo[i].goal, 0,
- sizeof(tstate->transinfo[i].goal));
- }
- } else
- memset(tstate, 0, sizeof(*tstate));
- ahc->enabled_targets[scsi_id] = tstate;
- return (tstate);
-}
-
-#ifdef AHC_TARGET_MODE
-/*
- * Free per target mode instance (ID we respond to as a target)
- * transfer negotiation data structures.
- */
-static void
-ahc_free_tstate(struct ahc_softc *ahc, u_int scsi_id, char channel, int force)
-{
- struct ahc_tmode_tstate *tstate;
-
- /*
- * Don't clean up our "master" tstate.
- * It has our default user settings.
- */
- if (((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
-
-/*
- * 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 and sync settings for
- * the target.
- */
-struct ahc_syncrate *
-ahc_devlimited_syncrate(struct ahc_softc *ahc,
- struct ahc_initiator_tinfo *tinfo,
- u_int *period, u_int *ppr_options, role_t role) {
- struct ahc_transinfo *transinfo;
- 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_DT;
- } else {
- maxsync = AHC_SYNCRATE_ULTRA;
- /* Can't do DT on an SE bus */
- *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
- }
- } else if ((ahc->features & AHC_ULTRA) != 0) {
- maxsync = AHC_SYNCRATE_ULTRA;
- } else {
- maxsync = AHC_SYNCRATE_FAST;
- }
- /*
- * Never allow a value higher than our current goal
- * period otherwise we may allow a target initiated
- * negotiation to go above the limit as set by the
- * user. In the case of an initiator initiated
- * sync negotiation, we limit based on the user
- * setting. This allows the system to still accept
- * incoming negotiations even if target initiated
- * negotiation is not performed.
- */
- if (role == ROLE_TARGET)
- transinfo = &tinfo->user;
- else
- transinfo = &tinfo->goal;
- *ppr_options &= transinfo->ppr_options;
- if (transinfo->period == 0) {
- *period = 0;
- *ppr_options = 0;
- return (NULL);
- }
- *period = MAX(*period, transinfo->period);
- return (ahc_find_syncrate(ahc, period, ppr_options, 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.
- */
-struct ahc_syncrate *
-ahc_find_syncrate(struct ahc_softc *ahc, u_int *period,
- u_int *ppr_options, u_int maxsync)
-{
- struct ahc_syncrate *syncrate;
-
- if ((ahc->features & AHC_DT) == 0)
- *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
-
- /* Skip all DT only entries if DT is not available */
- if ((*ppr_options & MSG_EXT_PPR_DT_REQ) == 0
- && maxsync < AHC_SYNCRATE_ULTRA2)
- maxsync = AHC_SYNCRATE_ULTRA2;
-
- for (syncrate = &ahc_syncrates[maxsync];
- syncrate->rate != NULL;
- syncrate++) {
-
- /*
- * The Ultra2 table doesn't go as low
- * as for the Fast/Ultra cards.
- */
- if ((ahc->features & AHC_ULTRA2) != 0
- && (syncrate->sxfr_u2 == 0))
- break;
-
- 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;
-
- /*
- * At some speeds, we only support
- * ST transfers.
- */
- if ((syncrate->sxfr_u2 & ST_SXFR) != 0)
- *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
- break;
- }
- }
-
- if ((*period == 0)
- || (syncrate->rate == NULL)
- || ((ahc->features & AHC_ULTRA2) != 0
- && (syncrate->sxfr_u2 == 0))) {
- /* Use asynchronous transfers. */
- *period = 0;
- syncrate = NULL;
- *ppr_options &= ~MSG_EXT_PPR_DT_REQ;
- }
- return (syncrate);
-}
-
-/*
- * Convert from an entry in our syncrate table to the SCSI equivalent
- * sync "period" factor.
- */
-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 */
-}
-
-/*
- * Truncate the given synchronous offset to a value the
- * current adapter type and syncrate are capable of.
- */
-void
-ahc_validate_offset(struct ahc_softc *ahc,
- struct ahc_initiator_tinfo *tinfo,
- struct ahc_syncrate *syncrate,
- u_int *offset, int wide, role_t role)
-{
- 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);
- if (tinfo != NULL) {
- if (role == ROLE_TARGET)
- *offset = MIN(*offset, tinfo->user.offset);
- else
- *offset = MIN(*offset, tinfo->goal.offset);
- }
-}
-
-/*
- * Truncate the given transfer width parameter to a value the
- * current adapter type is capable of.
- */
-void
-ahc_validate_width(struct ahc_softc *ahc, struct ahc_initiator_tinfo *tinfo,
- u_int *bus_width, role_t role)
-{
- 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;
- }
- if (tinfo != NULL) {
- if (role == ROLE_TARGET)
- *bus_width = MIN(tinfo->user.width, *bus_width);
- else
- *bus_width = MIN(tinfo->goal.width, *bus_width);
- }
-}
-
-/*
- * Update the bitmask of targets for which the controller should
- * negotiate with at the next convenient oportunity. This currently
- * means the next time we send the initial identify messages for
- * a new transaction.
- */
-int
-ahc_update_neg_request(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
- struct ahc_tmode_tstate *tstate,
- struct ahc_initiator_tinfo *tinfo, int force)
-{
- u_int auto_negotiate_orig;
-
- auto_negotiate_orig = tstate->auto_negotiate;
- if (tinfo->curr.period != tinfo->goal.period
- || tinfo->curr.width != tinfo->goal.width
- || tinfo->curr.offset != tinfo->goal.offset
- || tinfo->curr.ppr_options != tinfo->goal.ppr_options
- || (force
- && (tinfo->goal.period != 0
- || tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT
- || tinfo->goal.ppr_options != 0)))
- tstate->auto_negotiate |= devinfo->target_mask;
- else
- tstate->auto_negotiate &= ~devinfo->target_mask;
-
- return (auto_negotiate_orig != tstate->auto_negotiate);
-}
-
-/*
- * Update the user/goal/curr tables of synchronous negotiation
- * parameters as well as, in the case of a current or active update,
- * any data structures on the host controller. In the case of an
- * active update, the specified target is currently talking to us on
- * the bus, so the transfer parameter update must take effect
- * immediately.
- */
-void
-ahc_set_syncrate(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
- struct ahc_syncrate *syncrate, u_int period,
- u_int offset, u_int ppr_options, u_int type, int paused)
-{
- struct ahc_initiator_tinfo *tinfo;
- struct ahc_tmode_tstate *tstate;
- u_int old_period;
- u_int old_offset;
- u_int old_ppr;
- int active;
- int update_needed;
-
- active = (type & AHC_TRANS_ACTIVE) == AHC_TRANS_ACTIVE;
- update_needed = 0;
-
- if (syncrate == NULL) {
- period = 0;
- offset = 0;
- }
-
- tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
- devinfo->target, &tstate);
-
- if ((type & AHC_TRANS_USER) != 0) {
- tinfo->user.period = period;
- tinfo->user.offset = offset;
- tinfo->user.ppr_options = ppr_options;
- }
-
- if ((type & AHC_TRANS_GOAL) != 0) {
- tinfo->goal.period = period;
- tinfo->goal.offset = offset;
- tinfo->goal.ppr_options = ppr_options;
- }
-
- old_period = tinfo->curr.period;
- old_offset = tinfo->curr.offset;
- old_ppr = tinfo->curr.ppr_options;
-
- if ((type & AHC_TRANS_CUR) != 0
- && (old_period != period
- || old_offset != offset
- || old_ppr != ppr_options)) {
- u_int scsirate;
-
- update_needed++;
- scsirate = tinfo->scsirate;
- if ((ahc->features & AHC_ULTRA2) != 0) {
-
- scsirate &= ~(SXFR_ULTRA2|SINGLE_EDGE|ENABLE_CRC);
- if (syncrate != NULL) {
- scsirate |= syncrate->sxfr_u2;
- if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0)
- scsirate |= ENABLE_CRC;
- else
- scsirate |= SINGLE_EDGE;
- }
- } 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);
- if ((ahc->features & AHC_ULTRA2) != 0)
- ahc_outb(ahc, SCSIOFFSET, offset);
- }
-
- tinfo->scsirate = scsirate;
- tinfo->curr.period = period;
- tinfo->curr.offset = offset;
- tinfo->curr.ppr_options = ppr_options;
-
- ahc_send_async(ahc, devinfo->channel, devinfo->target,
- CAM_LUN_WILDCARD, AC_TRANSFER_NEG, NULL);
- if (bootverbose) {
- if (offset != 0) {
- printf("%s: target %d synchronous at %sMHz%s, "
- "offset = 0x%x\n", ahc_name(ahc),
- devinfo->target, syncrate->rate,
- (ppr_options & MSG_EXT_PPR_DT_REQ)
- ? " DT" : "", offset);
- } else {
- printf("%s: target %d using "
- "asynchronous transfers\n",
- ahc_name(ahc), devinfo->target);
- }
- }
- }
-
- update_needed += ahc_update_neg_request(ahc, devinfo, tstate,
- tinfo, /*force*/FALSE);
-
- if (update_needed)
- ahc_update_pending_scbs(ahc);
-}
-
-/*
- * Update the user/goal/curr tables of wide negotiation
- * parameters as well as, in the case of a current or active update,
- * any data structures on the host controller. In the case of an
- * active update, the specified target is currently talking to us on
- * the bus, so the transfer parameter update must take effect
- * immediately.
- */
-void
-ahc_set_width(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
- u_int width, u_int type, int paused)
-{
- struct ahc_initiator_tinfo *tinfo;
- struct ahc_tmode_tstate *tstate;
- u_int oldwidth;
- int active;
- int update_needed;
-
- active = (type & AHC_TRANS_ACTIVE) == AHC_TRANS_ACTIVE;
- update_needed = 0;
- tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
- devinfo->target, &tstate);
-
- if ((type & AHC_TRANS_USER) != 0)
- tinfo->user.width = width;
-
- if ((type & AHC_TRANS_GOAL) != 0)
- tinfo->goal.width = width;
-
- oldwidth = tinfo->curr.width;
- if ((type & AHC_TRANS_CUR) != 0 && oldwidth != width) {
- u_int scsirate;
-
- update_needed++;
- 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->curr.width = width;
-
- ahc_send_async(ahc, devinfo->channel, devinfo->target,
- CAM_LUN_WILDCARD, AC_TRANSFER_NEG, NULL);
- if (bootverbose) {
- printf("%s: target %d using %dbit transfers\n",
- ahc_name(ahc), devinfo->target,
- 8 * (0x01 << width));
- }
- }
-
- update_needed += ahc_update_neg_request(ahc, devinfo, tstate,
- tinfo, /*force*/FALSE);
- if (update_needed)
- ahc_update_pending_scbs(ahc);
-}
-
-/*
- * Update the current state of tagged queuing for a given target.
- */
-void
-ahc_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
- ahc_queue_alg alg)
-{
- ahc_platform_set_tags(ahc, devinfo, alg);
- ahc_send_async(ahc, devinfo->channel, devinfo->target,
- devinfo->lun, AC_TRANSFER_NEG, &alg);
-}
-
-/*
- * When the transfer settings for a connection change, update any
- * in-transit SCBs to contain the new data so the hardware will
- * be set correctly during future (re)selections.
- */
-static void
-ahc_update_pending_scbs(struct ahc_softc *ahc)
-{
- struct scb *pending_scb;
- int pending_scb_count;
- int i;
- int paused;
- u_int saved_scbptr;
-
- /*
- * Traverse the pending SCB list and ensure that all of the
- * SCBs there have the proper settings.
- */
- pending_scb_count = 0;
- LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
- struct ahc_devinfo devinfo;
- struct hardware_scb *pending_hscb;
- struct ahc_initiator_tinfo *tinfo;
- struct ahc_tmode_tstate *tstate;
-
- ahc_scb_devinfo(ahc, &devinfo, pending_scb);
- tinfo = ahc_fetch_transinfo(ahc, devinfo.channel,
- devinfo.our_scsiid,
- devinfo.target, &tstate);
- pending_hscb = pending_scb->hscb;
- pending_hscb->control &= ~ULTRAENB;
- if ((tstate->ultraenb & devinfo.target_mask) != 0)
- pending_hscb->control |= ULTRAENB;
- pending_hscb->scsirate = tinfo->scsirate;
- pending_hscb->scsioffset = tinfo->curr.offset;
- if ((tstate->auto_negotiate & devinfo.target_mask) == 0
- && (pending_scb->flags & SCB_AUTO_NEGOTIATE) != 0) {
- pending_scb->flags &= ~SCB_AUTO_NEGOTIATE;
- pending_hscb->control &= ~MK_MESSAGE;
- }
- ahc_sync_scb(ahc, pending_scb,
- BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
- pending_scb_count++;
- }
-
- if (pending_scb_count == 0)
- return;
-
- if (ahc_is_paused(ahc)) {
- paused = 1;
- } else {
- paused = 0;
- ahc_pause(ahc);
- }
-
- 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++) {
- struct hardware_scb *pending_hscb;
- u_int control;
- u_int scb_tag;
-
- ahc_outb(ahc, SCBPTR, i);
- scb_tag = ahc_inb(ahc, SCB_TAG);
- pending_scb = ahc_lookup_scb(ahc, scb_tag);
- if (pending_scb == NULL)
- continue;
-
- pending_hscb = pending_scb->hscb;
- control = ahc_inb(ahc, SCB_CONTROL);
- control &= ~(ULTRAENB|MK_MESSAGE);
- control |= pending_hscb->control & (ULTRAENB|MK_MESSAGE);
- ahc_outb(ahc, SCB_CONTROL, control);
- ahc_outb(ahc, SCB_SCSIRATE, pending_hscb->scsirate);
- ahc_outb(ahc, SCB_SCSIOFFSET, pending_hscb->scsioffset);
- }
- ahc_outb(ahc, SCBPTR, saved_scbptr);
-
- if (paused == 0)
- ahc_unpause(ahc);
-}
-
-/**************************** Pathing Information *****************************/
-static void
-ahc_fetch_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
-{
- u_int saved_scsiid;
- 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_scsiid = ahc_inb(ahc, SAVED_SCSIID);
- ahc_compile_devinfo(devinfo,
- our_id,
- SCSIID_TARGET(ahc, saved_scsiid),
- ahc_inb(ahc, SAVED_LUN),
- SCSIID_CHANNEL(ahc, saved_scsiid),
- role);
-}
-
-struct ahc_phase_table_entry*
-ahc_lookup_phase_entry(int phase)
-{
- struct ahc_phase_table_entry *entry;
- struct ahc_phase_table_entry *last_entry;
-
- /*
- * num_phases doesn't include the default entry which
- * will be returned if the phase doesn't match.
- */
- last_entry = &ahc_phase_table[num_phases];
- for (entry = ahc_phase_table; entry < last_entry; entry++) {
- if (phase == entry->phase)
- break;
- }
- return (entry);
-}
-
-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);
-}
-
-static void
-ahc_scb_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
- struct scb *scb)
-{
- role_t role;
- int our_id;
-
- our_id = SCSIID_OUR_ID(scb->hscb->scsiid);
- role = ROLE_INITIATOR;
- if ((scb->hscb->control & TARGET_SCB) != 0)
- role = ROLE_TARGET;
- ahc_compile_devinfo(devinfo, our_id, SCB_GET_TARGET(ahc, scb),
- SCB_GET_LUN(scb), SCB_GET_CHANNEL(ahc, scb), role);
-}
-
-
-/************************ Message Phase Processing ****************************/
-static void
-ahc_assert_atn(struct ahc_softc *ahc)
-{
- u_int scsisigo;
-
- scsisigo = ATNO;
- if ((ahc->features & AHC_DT) == 0)
- scsisigo |= ahc_inb(ahc, SCSISIGI);
- ahc_outb(ahc, SCSISIGO, scsisigo);
-}
-
-/*
- * When an initiator transaction with the MK_MESSAGE flag either reconnects
- * or enters the initial message out phase, we are interrupted. Fill our
- * outgoing message buffer with the appropriate message and beging handing
- * the message phase(s) manually.
- */
-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_GET_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) {
- ahc->msgout_buf[ahc->msgout_index++] =
- scb->hscb->control & (TAG_ENB|SCB_TAG_TYPE);
- 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++;
- ahc_print_path(ahc, scb);
- printf("Bus Device Reset Message Sent\n");
- /*
- * Clear our selection hardware in advance of
- * the busfree. We may have an entry in the waiting
- * Q for this target, and we don't want to go about
- * selecting while we handle the busfree and blow it
- * away.
- */
- ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO));
- } else if ((scb->flags & SCB_ABORT) != 0) {
- 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++;
- ahc_print_path(ahc, scb);
- printf("Abort%s Message Sent\n",
- (scb->hscb->control & TAG_ENB) != 0 ? " Tag" : "");
- /*
- * Clear our selection hardware in advance of
- * the busfree. We may have an entry in the waiting
- * Q for this target, and we don't want to go about
- * selecting while we handle the busfree and blow it
- * away.
- */
- ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO));
- } else if ((scb->flags & (SCB_AUTO_NEGOTIATE|SCB_NEGOTIATE)) != 0) {
- ahc_build_transfer_msg(ahc, devinfo);
- } else {
- printf("ahc_intr: AWAITING_MSG for an SCB that "
- "does not have a waiting message\n");
- printf("SCSIID = %x, target_mask = %x\n", scb->hscb->scsiid,
- devinfo->target_mask);
- 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);
- scb->hscb->control &= ~MK_MESSAGE;
- ahc->msgout_index = 0;
- ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
-}
-
-/*
- * Build an appropriate transfer negotiation message for the
- * currently active target.
- */
-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 ahc_tmode_tstate *tstate;
- struct ahc_syncrate *rate;
- int dowide;
- int dosync;
- int doppr;
- int use_ppr;
- u_int period;
- u_int ppr_options;
- u_int offset;
-
- tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
- devinfo->target, &tstate);
- /*
- * Filter our period based on the current connection.
- * If we can't perform DT transfers on this segment (not in LVD
- * mode for instance), then our decision to issue a PPR message
- * may change.
- */
- period = tinfo->goal.period;
- ppr_options = tinfo->goal.ppr_options;
- /* Target initiated PPR is not allowed in the SCSI spec */
- if (devinfo->role == ROLE_TARGET)
- ppr_options = 0;
- rate = ahc_devlimited_syncrate(ahc, tinfo, &period,
- &ppr_options, devinfo->role);
- dowide = tinfo->curr.width != tinfo->goal.width;
- dosync = tinfo->curr.period != period;
- doppr = tinfo->curr.ppr_options != ppr_options;
-
- if (!dowide && !dosync && !doppr) {
- dowide = tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT;
- dosync = tinfo->goal.period != 0;
- doppr = tinfo->goal.ppr_options != 0;
- }
-
- if (!dowide && !dosync && !doppr) {
- panic("ahc_intr: AWAITING_MSG for negotiation, "
- "but no negotiation needed\n");
- }
-
- use_ppr = (tinfo->curr.transport_version >= 3) || doppr;
- /* Target initiated PPR is not allowed in the SCSI spec */
- if (devinfo->role == ROLE_TARGET)
- use_ppr = 0;
-
- /*
- * Both the PPR message and SDTR message require the
- * goal syncrate to be limited to what the target device
- * is capable of handling (based on whether an LVD->SE
- * expander is on the bus), so combine these two cases.
- * Regardless, guarantee that if we are using WDTR and SDTR
- * messages that WDTR comes first.
- */
- if (use_ppr || (dosync && !dowide)) {
-
- offset = tinfo->goal.offset;
- ahc_validate_offset(ahc, tinfo, rate, &offset,
- use_ppr ? tinfo->goal.width
- : tinfo->curr.width,
- devinfo->role);
- if (use_ppr) {
- ahc_construct_ppr(ahc, devinfo, period, offset,
- tinfo->goal.width, ppr_options);
- } else {
- ahc_construct_sdtr(ahc, devinfo, period, offset);
- }
- } else {
- ahc_construct_wdtr(ahc, devinfo, tinfo->goal.width);
- }
-}
-
-/*
- * Build a synchronous negotiation message in our message
- * buffer based on the input parameters.
- */
-static void
-ahc_construct_sdtr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
- 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;
- if (bootverbose) {
- printf("(%s:%c:%d:%d): Sending SDTR period %x, offset %x\n",
- ahc_name(ahc), devinfo->channel, devinfo->target,
- devinfo->lun, period, offset);
- }
-}
-
-/*
- * Build a wide negotiation message in our message
- * buffer based on the input parameters.
- */
-static void
-ahc_construct_wdtr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
- 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;
- if (bootverbose) {
- printf("(%s:%c:%d:%d): Sending WDTR %x\n",
- ahc_name(ahc), devinfo->channel, devinfo->target,
- devinfo->lun, bus_width);
- }
-}
-
-/*
- * Build a parallel protocol request message in our message
- * buffer based on the input parameters.
- */
-static void
-ahc_construct_ppr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
- u_int period, u_int offset, u_int bus_width,
- u_int ppr_options)
-{
- ahc->msgout_buf[ahc->msgout_index++] = MSG_EXTENDED;
- ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_PPR_LEN;
- ahc->msgout_buf[ahc->msgout_index++] = MSG_EXT_PPR;
- ahc->msgout_buf[ahc->msgout_index++] = period;
- ahc->msgout_buf[ahc->msgout_index++] = 0;
- ahc->msgout_buf[ahc->msgout_index++] = offset;
- ahc->msgout_buf[ahc->msgout_index++] = bus_width;
- ahc->msgout_buf[ahc->msgout_index++] = ppr_options;
- ahc->msgout_len += 8;
- if (bootverbose) {
- printf("(%s:%c:%d:%d): Sending PPR bus_width %x, period %x, "
- "offset %x, ppr_options %x\n", ahc_name(ahc),
- devinfo->channel, devinfo->target, devinfo->lun,
- bus_width, period, offset, ppr_options);
- }
-}
-
-/*
- * Clear any active message state.
- */
-static void
-ahc_clear_msg_state(struct ahc_softc *ahc)
-{
- ahc->msgout_len = 0;
- ahc->msgin_index = 0;
- ahc->msg_type = MSG_TYPE_NONE;
- if ((ahc_inb(ahc, SCSISIGI) & ATNI) != 0) {
- /*
- * The target didn't care to respond to our
- * message request, so clear ATN.
- */
- ahc_outb(ahc, CLRSINT1, CLRATNO);
- }
- ahc_outb(ahc, MSG_OUT, MSG_NOOP);
- ahc_outb(ahc, SEQ_FLAGS2,
- ahc_inb(ahc, SEQ_FLAGS2) & ~TARGET_MSG_PENDING);
-}
-
-/*
- * Manual message loop handler.
- */
-static void
-ahc_handle_message_phase(struct ahc_softc *ahc)
-{
- 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("HOST_MSG_LOOP 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_assert_atn(ahc);
- }
-
- 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, &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_assert_atn(ahc);
- } 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, &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, return true only if the target saw the full
- * message. If "full" is false, return true if the target saw at
- * least the first byte of the message.
- */
-static int
-ahc_sent_msg(struct ahc_softc *ahc, ahc_msgtype type, u_int msgval, int full)
-{
- int found;
- u_int index;
-
- found = FALSE;
- index = 0;
-
- while (index < ahc->msgout_len) {
- if (ahc->msgout_buf[index] == MSG_EXTENDED) {
- u_int end_index;
-
- end_index = index + 1 + ahc->msgout_buf[index + 1];
- if (ahc->msgout_buf[index+2] == msgval
- && type == AHCMSG_EXT) {
-
- if (full) {
- if (ahc->msgout_index > end_index)
- found = TRUE;
- } else if (ahc->msgout_index > index)
- found = TRUE;
- }
- index = end_index;
- } else if (ahc->msgout_buf[index] >= MSG_SIMPLE_TASK
- && ahc->msgout_buf[index] <= MSG_IGN_WIDE_RESIDUE) {
-
- /* Skip tag type and tag id or residue param*/
- index += 2;
- } else {
- /* Single byte message */
- if (type == AHCMSG_1B
- && ahc->msgout_buf[index] == msgval
- && ahc->msgout_index > index)
- found = TRUE;
- index++;
- }
-
- if (found)
- break;
- }
- return (found);
-}
-
-/*
- * Wait for a complete incoming message, parse it, and respond accordingly.
- */
-static int
-ahc_parse_msg(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
-{
- struct ahc_initiator_tinfo *tinfo;
- struct ahc_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_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 ppr_options;
- 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];
- ppr_options = 0;
- saved_offset = offset = ahc->msgin_buf[4];
- syncrate = ahc_devlimited_syncrate(ahc, tinfo, &period,
- &ppr_options,
- devinfo->role);
- ahc_validate_offset(ahc, tinfo, syncrate, &offset,
- targ_scsirate & WIDEXFER,
- devinfo->role);
- if (bootverbose) {
- printf("(%s:%c:%d:%d): Received "
- "SDTR period %x, offset %x\n\t"
- "Filtered to period %x, offset %x\n",
- ahc_name(ahc), devinfo->channel,
- devinfo->target, devinfo->lun,
- ahc->msgin_buf[3], saved_offset,
- period, offset);
- }
- ahc_set_syncrate(ahc, devinfo,
- syncrate, period,
- offset, ppr_options,
- AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
- /*paused*/TRUE);
-
- /*
- * See if we initiated Sync Negotiation
- * and didn't have to fall down to async
- * transfers.
- */
- if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_SDTR, TRUE)) {
- /* We started it */
- if (saved_offset != offset) {
- /* Went too low - force async */
- reject = TRUE;
- }
- } else {
- /*
- * Send our own SDTR in reply
- */
- if (bootverbose
- && devinfo->role == ROLE_INITIATOR) {
- printf("(%s:%c:%d:%d): Target "
- "Initiated SDTR\n",
- ahc_name(ahc), devinfo->channel,
- devinfo->target, devinfo->lun);
- }
- ahc->msgout_index = 0;
- ahc->msgout_len = 0;
- ahc_construct_sdtr(ahc, devinfo,
- period, offset);
- ahc->msgout_index = 0;
- response = TRUE;
- }
- done = MSGLOOP_MSGCOMPLETE;
- break;
- }
- case MSG_EXT_WDTR:
- {
- u_int bus_width;
- u_int saved_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];
- saved_width = bus_width;
- ahc_validate_width(ahc, tinfo, &bus_width,
- devinfo->role);
- if (bootverbose) {
- printf("(%s:%c:%d:%d): Received WDTR "
- "%x filtered to %x\n",
- ahc_name(ahc), devinfo->channel,
- devinfo->target, devinfo->lun,
- saved_width, bus_width);
- }
-
- if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_WDTR, TRUE)) {
- /*
- * Don't send a WDTR back to the
- * target, since we asked first.
- * If the width went higher than our
- * request, reject it.
- */
- if (saved_width > bus_width) {
- reject = TRUE;
- printf("(%s:%c:%d:%d): requested %dBit "
- "transfers. Rejecting...\n",
- ahc_name(ahc), devinfo->channel,
- devinfo->target, devinfo->lun,
- 8 * (0x01 << bus_width));
- bus_width = 0;
- }
- } else {
- /*
- * Send our own WDTR in reply
- */
- if (bootverbose
- && devinfo->role == ROLE_INITIATOR) {
- printf("(%s:%c:%d:%d): Target "
- "Initiated WDTR\n",
- ahc_name(ahc), devinfo->channel,
- devinfo->target, devinfo->lun);
- }
- ahc->msgout_index = 0;
- ahc->msgout_len = 0;
- ahc_construct_wdtr(ahc, devinfo, 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);
- /* After a wide message, we are async */
- ahc_set_syncrate(ahc, devinfo,
- /*syncrate*/NULL, /*period*/0,
- /*offset*/0, /*ppr_options*/0,
- AHC_TRANS_ACTIVE, /*paused*/TRUE);
- if (sending_reply == FALSE && reject == FALSE) {
-
- if (tinfo->goal.period) {
- ahc->msgout_index = 0;
- ahc->msgout_len = 0;
- ahc_build_transfer_msg(ahc, devinfo);
- ahc->msgout_index = 0;
- response = TRUE;
- }
- }
- done = MSGLOOP_MSGCOMPLETE;
- break;
- }
- case MSG_EXT_PPR:
- {
- struct ahc_syncrate *syncrate;
- u_int period;
- u_int offset;
- u_int bus_width;
- u_int ppr_options;
- u_int saved_width;
- u_int saved_offset;
- u_int saved_ppr_options;
-
- if (ahc->msgin_buf[1] != MSG_EXT_PPR_LEN) {
- reject = TRUE;
- break;
- }
-
- /*
- * Wait until we have all args before validating
- * and acting on this message.
- *
- * Add one to MSG_EXT_PPR_LEN to account for
- * the extended message preamble.
- */
- if (ahc->msgin_index < (MSG_EXT_PPR_LEN + 1))
- break;
-
- period = ahc->msgin_buf[3];
- offset = ahc->msgin_buf[5];
- bus_width = ahc->msgin_buf[6];
- saved_width = bus_width;
- ppr_options = ahc->msgin_buf[7];
- /*
- * According to the spec, a DT only
- * period factor with no DT option
- * set implies async.
- */
- if ((ppr_options & MSG_EXT_PPR_DT_REQ) == 0
- && period == 9)
- offset = 0;
- saved_ppr_options = ppr_options;
- saved_offset = offset;
-
- /*
- * Mask out any options we don't support
- * on any controller. Transfer options are
- * only available if we are negotiating wide.
- */
- ppr_options &= MSG_EXT_PPR_DT_REQ;
- if (bus_width == 0)
- ppr_options = 0;
-
- ahc_validate_width(ahc, tinfo, &bus_width,
- devinfo->role);
- syncrate = ahc_devlimited_syncrate(ahc, tinfo, &period,
- &ppr_options,
- devinfo->role);
- ahc_validate_offset(ahc, tinfo, syncrate,
- &offset, bus_width,
- devinfo->role);
-
- if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_PPR, TRUE)) {
- /*
- * If we are unable to do any of the
- * requested options (we went too low),
- * then we'll have to reject the message.
- */
- if (saved_width > bus_width
- || saved_offset != offset
- || saved_ppr_options != ppr_options) {
- reject = TRUE;
- period = 0;
- offset = 0;
- bus_width = 0;
- ppr_options = 0;
- syncrate = NULL;
- }
- } else {
- if (devinfo->role != ROLE_TARGET)
- printf("(%s:%c:%d:%d): Target "
- "Initiated PPR\n",
- ahc_name(ahc), devinfo->channel,
- devinfo->target, devinfo->lun);
- else
- printf("(%s:%c:%d:%d): Initiator "
- "Initiated PPR\n",
- ahc_name(ahc), devinfo->channel,
- devinfo->target, devinfo->lun);
- ahc->msgout_index = 0;
- ahc->msgout_len = 0;
- ahc_construct_ppr(ahc, devinfo, period, offset,
- bus_width, ppr_options);
- ahc->msgout_index = 0;
- response = TRUE;
- }
- if (bootverbose) {
- printf("(%s:%c:%d:%d): Received PPR width %x, "
- "period %x, offset %x,options %x\n"
- "\tFiltered to width %x, period %x, "
- "offset %x, options %x\n",
- ahc_name(ahc), devinfo->channel,
- devinfo->target, devinfo->lun,
- saved_width, ahc->msgin_buf[3],
- saved_offset, saved_ppr_options,
- bus_width, period, offset, ppr_options);
- }
- ahc_set_width(ahc, devinfo, bus_width,
- AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
- /*paused*/TRUE);
- ahc_set_syncrate(ahc, devinfo,
- syncrate, period,
- offset, ppr_options,
- AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
- /*paused*/TRUE);
- done = MSGLOOP_MSGCOMPLETE;
- break;
- }
- default:
- /* Unknown extended message. Reject it. */
- reject = TRUE;
- break;
- }
- break;
- }
-#ifdef AHC_TARGET_MODE
- case MSG_BUS_DEV_RESET:
- ahc_handle_devreset(ahc, devinfo,
- CAM_BDR_SENT,
- "Bus Device Reset Received",
- /*verbose_level*/0);
- ahc_restart(ahc);
- done = MSGLOOP_TERMINATED;
- break;
- case MSG_ABORT_TAG:
- case MSG_ABORT:
- case MSG_CLEAR_QUEUE:
- {
- int tag;
-
- /* Target mode messages */
- if (devinfo->role != ROLE_TARGET) {
- reject = TRUE;
- break;
- }
- tag = SCB_LIST_NULL;
- if (ahc->msgin_buf[0] == MSG_ABORT_TAG)
- tag = ahc_inb(ahc, INITIATOR_TAG);
- ahc_abort_scbs(ahc, devinfo->target, devinfo->channel,
- devinfo->lun, tag, ROLE_TARGET,
- CAM_REQ_ABORTED);
-
- tstate = ahc->enabled_targets[devinfo->our_scsiid];
- if (tstate != NULL) {
- struct ahc_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*/tag);
- ahc_send_lstate_events(ahc, lstate);
- }
- }
- ahc_restart(ahc);
- done = MSGLOOP_TERMINATED;
- break;
- }
-#endif
- 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);
-}
-
-/*
- * Process a message reject message.
- */
-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;
- struct ahc_initiator_tinfo *tinfo;
- struct ahc_tmode_tstate *tstate;
- u_int scb_index;
- u_int last_msg;
- int response = 0;
-
- scb_index = ahc_inb(ahc, SCB_TAG);
- scb = ahc_lookup_scb(ahc, scb_index);
- tinfo = ahc_fetch_transinfo(ahc, devinfo->channel,
- devinfo->our_scsiid,
- devinfo->target, &tstate);
- /* Might be necessary */
- last_msg = ahc_inb(ahc, LAST_MSG);
-
- if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_PPR, /*full*/FALSE)) {
- /*
- * Target does not support the PPR message.
- * Attempt to negotiate SPI-2 style.
- */
- if (bootverbose) {
- printf("(%s:%c:%d:%d): PPR Rejected. "
- "Trying WDTR/SDTR\n",
- ahc_name(ahc), devinfo->channel,
- devinfo->target, devinfo->lun);
- }
- tinfo->goal.ppr_options = 0;
- tinfo->curr.transport_version = 2;
- tinfo->goal.transport_version = 2;
- ahc->msgout_index = 0;
- ahc->msgout_len = 0;
- ahc_build_transfer_msg(ahc, devinfo);
- ahc->msgout_index = 0;
- response = 1;
- } else if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_WDTR, /*full*/FALSE)) {
-
- /* note 8bit xfers */
- printf("(%s:%c:%d:%d): refuses WIDE negotiation. Using "
- "8bit transfers\n", ahc_name(ahc),
- devinfo->channel, devinfo->target, devinfo->lun);
- ahc_set_width(ahc, devinfo, MSG_EXT_WDTR_BUS_8_BIT,
- AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
- /*paused*/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.
- */
- if (tinfo->goal.period) {
-
- /* Start the sync negotiation */
- ahc->msgout_index = 0;
- ahc->msgout_len = 0;
- ahc_build_transfer_msg(ahc, devinfo);
- ahc->msgout_index = 0;
- response = 1;
- }
- } else if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_SDTR, /*full*/FALSE)) {
- /* note asynch xfers and clear flag */
- ahc_set_syncrate(ahc, devinfo, /*syncrate*/NULL, /*period*/0,
- /*offset*/0, /*ppr_options*/0,
- AHC_TRANS_ACTIVE|AHC_TRANS_GOAL,
- /*paused*/TRUE);
- printf("(%s:%c:%d:%d): refuses synchronous negotiation. "
- "Using asynchronous transfers\n",
- ahc_name(ahc), devinfo->channel,
- devinfo->target, devinfo->lun);
- } else if ((scb->hscb->control & MSG_SIMPLE_TASK) != 0) {
- int tag_type;
- int mask;
-
- tag_type = (scb->hscb->control & MSG_SIMPLE_TASK);
-
- if (tag_type == MSG_SIMPLE_TASK) {
- printf("(%s:%c:%d:%d): refuses tagged commands. "
- "Performing non-tagged I/O\n", ahc_name(ahc),
- devinfo->channel, devinfo->target, devinfo->lun);
- ahc_set_tags(ahc, devinfo, AHC_QUEUE_NONE);
- mask = ~0x23;
- } else {
- printf("(%s:%c:%d:%d): refuses %s tagged commands. "
- "Performing simple queue tagged I/O only\n",
- ahc_name(ahc), devinfo->channel, devinfo->target,
- devinfo->lun, tag_type == MSG_ORDERED_TASK
- ? "ordered" : "head of queue");
- ahc_set_tags(ahc, devinfo, AHC_QUEUE_BASIC);
- mask = ~0x03;
- }
-
- /*
- * 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) & mask);
- scb->hscb->control &= mask;
- ahc_set_transaction_tag(scb, /*enabled*/FALSE,
- /*type*/MSG_SIMPLE_TASK);
- ahc_outb(ahc, MSG_OUT, MSG_IDENTIFYFLAG);
- ahc_assert_atn(ahc);
-
- /*
- * This transaction is now at the head of
- * the untagged queue for this target.
- */
- if ((ahc->flags & AHC_SCB_BTT) == 0) {
- struct scb_tailq *untagged_q;
-
- untagged_q =
- &(ahc->untagged_queues[devinfo->target_offset]);
- TAILQ_INSERT_HEAD(untagged_q, scb, links.tqe);
- scb->flags |= SCB_UNTAGGEDQ;
- }
- ahc_busy_tcl(ahc, BUILD_TCL(scb->hscb->scsiid, devinfo->lun),
- scb->hscb->tag);
-
- /*
- * Requeue all tagged commands for this target
- * currently in our posession so they can be
- * converted to untagged commands.
- */
- ahc_search_qinfifo(ahc, SCB_GET_TARGET(ahc, scb),
- SCB_GET_CHANNEL(ahc, scb),
- SCB_GET_LUN(scb), /*tag*/SCB_LIST_NULL,
- ROLE_INITIATOR, CAM_REQUEUE_REQ,
- 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);
-}
-
-/*
- * Process an ingnore wide residue message.
- */
-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_lookup_scb(ahc, scb_index);
- /*
- * XXX Actually check data direction in the sequencer?
- * Perhaps add datadir to some spare bits in the hscb?
- */
- if ((ahc_inb(ahc, SEQ_FLAGS) & DPHASE) == 0
- || ahc_get_transfer_dir(scb) != CAM_DIR_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.
- */
- uint32_t sgptr;
-
- sgptr = ahc_inb(ahc, SCB_RESIDUAL_SGPTR);
- if ((sgptr & SG_LIST_NULL) != 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 {
- struct ahc_dma_seg *sg;
- uint32_t data_cnt;
- uint32_t data_addr;
- uint32_t sglen;
-
- /* Pull in the rest of the sgptr */
- sgptr |= (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 3) << 24)
- | (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 2) << 16)
- | (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 1) << 8);
- sgptr &= SG_PTR_MASK;
- data_cnt = (ahc_inb(ahc, SCB_RESIDUAL_DATACNT+3) << 24)
- | (ahc_inb(ahc, SCB_RESIDUAL_DATACNT+2) << 16)
- | (ahc_inb(ahc, SCB_RESIDUAL_DATACNT+1) << 8)
- | (ahc_inb(ahc, SCB_RESIDUAL_DATACNT));
-
- 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 = ahc_sg_bus_to_virt(scb, sgptr);
- /*
- * The residual sg ptr points to the next S/G
- * to load so we must go back one.
- */
- sg--;
- sglen = ahc_le32toh(sg->len) & AHC_SG_LEN_MASK;
- if (sg != scb->sg_list
- && sglen < (data_cnt & AHC_SG_LEN_MASK)) {
-
- sg--;
- sglen = ahc_le32toh(sg->len);
- /*
- * Preserve High Address and SG_LIST bits
- * while setting the count to 1.
- */
- data_cnt = 1 | (sglen & (~AHC_SG_LEN_MASK));
- data_addr = ahc_le32toh(sg->addr)
- + (sglen & AHC_SG_LEN_MASK) - 1;
-
- /*
- * Increment sg so it points to the
- * "next" sg.
- */
- sg++;
- sgptr = ahc_sg_virt_to_bus(scb, sg);
- ahc_outb(ahc, SCB_RESIDUAL_SGPTR + 3,
- sgptr >> 24);
- ahc_outb(ahc, SCB_RESIDUAL_SGPTR + 2,
- sgptr >> 16);
- ahc_outb(ahc, SCB_RESIDUAL_SGPTR + 1,
- sgptr >> 8);
- ahc_outb(ahc, SCB_RESIDUAL_SGPTR, sgptr);
- }
-
- ahc_outb(ahc, SCB_RESIDUAL_DATACNT + 3, data_cnt >> 24);
- ahc_outb(ahc, SCB_RESIDUAL_DATACNT + 2, data_cnt >> 16);
- ahc_outb(ahc, SCB_RESIDUAL_DATACNT + 1, data_cnt >> 8);
- ahc_outb(ahc, SCB_RESIDUAL_DATACNT, data_cnt);
- }
- }
-}
-
-
-/*
- * Reinitialize the data pointers for the active transfer
- * based on its current residual.
- */
-static void
-ahc_reinitialize_dataptrs(struct ahc_softc *ahc)
-{
- struct scb *scb;
- struct ahc_dma_seg *sg;
- u_int scb_index;
- uint32_t sgptr;
- uint32_t resid;
- uint32_t dataptr;
-
- scb_index = ahc_inb(ahc, SCB_TAG);
- scb = ahc_lookup_scb(ahc, scb_index);
- sgptr = (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 3) << 24)
- | (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 2) << 16)
- | (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 1) << 8)
- | ahc_inb(ahc, SCB_RESIDUAL_SGPTR);
-
- sgptr &= SG_PTR_MASK;
- sg = ahc_sg_bus_to_virt(scb, sgptr);
-
- /* The residual sg_ptr always points to the next sg */
- sg--;
-
- resid = (ahc_inb(ahc, SCB_RESIDUAL_DATACNT + 2) << 16)
- | (ahc_inb(ahc, SCB_RESIDUAL_DATACNT + 1) << 8)
- | ahc_inb(ahc, SCB_RESIDUAL_DATACNT);
-
- dataptr = ahc_le32toh(sg->addr)
- + (ahc_le32toh(sg->len) & AHC_SG_LEN_MASK)
- - resid;
- if ((ahc->flags & AHC_39BIT_ADDRESSING) != 0) {
- u_int dscommand1;
-
- dscommand1 = ahc_inb(ahc, DSCOMMAND1);
- ahc_outb(ahc, DSCOMMAND1, dscommand1 | HADDLDSEL0);
- ahc_outb(ahc, HADDR,
- (ahc_le32toh(sg->len) >> 24) & SG_HIGH_ADDR_BITS);
- ahc_outb(ahc, DSCOMMAND1, dscommand1);
- }
- ahc_outb(ahc, HADDR + 3, dataptr >> 24);
- ahc_outb(ahc, HADDR + 2, dataptr >> 16);
- ahc_outb(ahc, HADDR + 1, dataptr >> 8);
- ahc_outb(ahc, HADDR, dataptr);
- ahc_outb(ahc, HCNT + 2, resid >> 16);
- ahc_outb(ahc, HCNT + 1, resid >> 8);
- ahc_outb(ahc, HCNT, resid);
- if ((ahc->features & AHC_ULTRA2) == 0) {
- ahc_outb(ahc, STCNT + 2, resid >> 16);
- ahc_outb(ahc, STCNT + 1, resid >> 8);
- ahc_outb(ahc, STCNT, resid);
- }
-}
-
-/*
- * Handle the effects of issuing a bus device reset message.
- */
-static void
-ahc_handle_devreset(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
- cam_status status, char *message, int verbose_level)
-{
-#ifdef AHC_TARGET_MODE
- struct ahc_tmode_tstate* tstate;
- u_int lun;
-#endif
- int found;
-
- found = ahc_abort_scbs(ahc, devinfo->target, devinfo->channel,
- CAM_LUN_WILDCARD, SCB_LIST_NULL, devinfo->role,
- status);
-
-#ifdef AHC_TARGET_MODE
- /*
- * Send an immediate notify ccb to all target mord peripheral
- * drivers affected by this action.
- */
- tstate = ahc->enabled_targets[devinfo->our_scsiid];
- if (tstate != NULL) {
- for (lun = 0; lun < AHC_NUM_LUNS; lun++) {
- struct ahc_tmode_lstate* lstate;
-
- lstate = tstate->enabled_luns[lun];
- if (lstate == NULL)
- continue;
-
- ahc_queue_lstate_event(ahc, lstate, devinfo->our_scsiid,
- MSG_BUS_DEV_RESET, /*arg*/0);
- ahc_send_lstate_events(ahc, lstate);
- }
- }
-#endif
-
- /*
- * Go back to async/narrow transfers and renegotiate.
- */
- ahc_set_width(ahc, devinfo, MSG_EXT_WDTR_BUS_8_BIT,
- AHC_TRANS_CUR, /*paused*/TRUE);
- ahc_set_syncrate(ahc, devinfo, /*syncrate*/NULL,
- /*period*/0, /*offset*/0, /*ppr_options*/0,
- AHC_TRANS_CUR, /*paused*/TRUE);
-
- ahc_send_async(ahc, devinfo->channel, devinfo->target,
- CAM_LUN_WILDCARD, AC_SENT_BDR, NULL);
-
- if (message != NULL
- && (verbose_level <= bootverbose))
- printf("%s: %s on %c:%d. %d SCBs aborted\n", ahc_name(ahc),
- message, devinfo->channel, devinfo->target, found);
-}
-
-#ifdef AHC_TARGET_MODE
-static void
-ahc_setup_target_msgin(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 != NULL && (scb->flags & SCB_AUTO_NEGOTIATE) != 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;
-}
-#endif
-/**************************** Initialization **********************************/
-/*
- * Allocate a controller structure for a new device
- * and perform initial initializion.
- */
-struct ahc_softc *
-ahc_alloc(void *platform_arg, char *name)
-{
- struct ahc_softc *ahc;
- int i;
-
-#ifndef __FreeBSD__
- ahc = malloc(sizeof(*ahc), M_DEVBUF, M_NOWAIT);
- if (!ahc) {
- printf("aic7xxx: cannot malloc softc!\n");
- free(name, M_DEVBUF);
- return NULL;
- }
-#else
- ahc = device_get_softc((device_t)platform_arg);
-#endif
- memset(ahc, 0, sizeof(*ahc));
- LIST_INIT(&ahc->pending_scbs);
- /* We don't know our unit number until the OSM sets it */
- ahc->name = name;
- ahc->unit = -1;
- ahc->description = NULL;
- ahc->channel = 'A';
- ahc->channel_b = 'B';
- ahc->chip = AHC_NONE;
- ahc->features = AHC_FENONE;
- ahc->bugs = AHC_BUGNONE;
- ahc->flags = AHC_FNONE;
-
- for (i = 0; i < 16; i++)
- TAILQ_INIT(&ahc->untagged_queues[i]);
- if (ahc_platform_alloc(ahc, platform_arg) != 0) {
- ahc_free(ahc);
- ahc = NULL;
- }
- return (ahc);
-}
-
-int
-ahc_softc_init(struct ahc_softc *ahc)
-{
-
- /* The IRQMS bit is only valid on VL and EISA chips */
- if ((ahc->chip & AHC_PCI) == 0)
- ahc->unpause = ahc_inb(ahc, HCNTRL) & IRQMS;
- else
- ahc->unpause = 0;
- ahc->pause = ahc->unpause | PAUSE;
- /* XXX The shared scb data stuff should be deprecated */
- if (ahc->scb_data == NULL) {
- ahc->scb_data = malloc(sizeof(*ahc->scb_data),
- M_DEVBUF, M_NOWAIT);
- if (ahc->scb_data == NULL)
- return (ENOMEM);
- memset(ahc->scb_data, 0, sizeof(*ahc->scb_data));
- }
-
- return (0);
-}
-
-void
-ahc_softc_insert(struct ahc_softc *ahc)
-{
- struct ahc_softc *list_ahc;
-
-#if AHC_PCI_CONFIG > 0
- /*
- * Second Function PCI devices need to inherit some
- * settings from function 0.
- */
- if ((ahc->chip & AHC_BUS_MASK) == AHC_PCI
- && (ahc->features & AHC_MULTI_FUNC) != 0) {
- TAILQ_FOREACH(list_ahc, &ahc_tailq, links) {
- ahc_dev_softc_t list_pci;
- ahc_dev_softc_t pci;
-
- list_pci = list_ahc->dev_softc;
- pci = ahc->dev_softc;
- if (ahc_get_pci_slot(list_pci) == ahc_get_pci_slot(pci)
- && ahc_get_pci_bus(list_pci) == ahc_get_pci_bus(pci)) {
- struct ahc_softc *master;
- struct ahc_softc *slave;
-
- if (ahc_get_pci_function(list_pci) == 0) {
- master = list_ahc;
- slave = ahc;
- } else {
- master = ahc;
- slave = list_ahc;
- }
- slave->flags &= ~AHC_BIOS_ENABLED;
- slave->flags |=
- master->flags & AHC_BIOS_ENABLED;
- slave->flags &= ~AHC_PRIMARY_CHANNEL;
- slave->flags |=
- master->flags & AHC_PRIMARY_CHANNEL;
- break;
- }
- }
- }
-#endif
-
- /*
- * Insertion sort into our list of softcs.
- */
- list_ahc = TAILQ_FIRST(&ahc_tailq);
- while (list_ahc != NULL
- && ahc_softc_comp(list_ahc, ahc) <= 0)
- list_ahc = TAILQ_NEXT(list_ahc, links);
- if (list_ahc != NULL)
- TAILQ_INSERT_BEFORE(list_ahc, ahc, links);
- else
- TAILQ_INSERT_TAIL(&ahc_tailq, ahc, links);
- ahc->init_level++;
-}
-
-void
-ahc_set_unit(struct ahc_softc *ahc, int unit)
-{
- ahc->unit = unit;
-}
-
-void
-ahc_set_name(struct ahc_softc *ahc, char *name)
-{
- if (ahc->name != NULL)
- free(ahc->name, M_DEVBUF);
- ahc->name = name;
-}
-
-void
-ahc_free(struct ahc_softc *ahc)
-{
- int i;
-
- ahc_fini_scbdata(ahc);
- switch (ahc->init_level) {
- default:
- case 5:
- ahc_shutdown(ahc);
- TAILQ_REMOVE(&ahc_tailq, ahc, links);
- /* FALLTHROUGH */
- case 4:
- ahc_dmamap_unload(ahc, ahc->shared_data_dmat,
- ahc->shared_data_dmamap);
- /* FALLTHROUGH */
- case 3:
- ahc_dmamem_free(ahc, ahc->shared_data_dmat, ahc->qoutfifo,
- ahc->shared_data_dmamap);
- ahc_dmamap_destroy(ahc, ahc->shared_data_dmat,
- ahc->shared_data_dmamap);
- /* FALLTHROUGH */
- case 2:
- ahc_dma_tag_destroy(ahc, ahc->shared_data_dmat);
- case 1:
-#ifndef __linux__
- ahc_dma_tag_destroy(ahc, ahc->buffer_dmat);
-#endif
- break;
- case 0:
- break;
- }
-
-#ifndef __linux__
- ahc_dma_tag_destroy(ahc, ahc->parent_dmat);
-#endif
- ahc_platform_free(ahc);
- for (i = 0; i < AHC_NUM_TARGETS; i++) {
- struct ahc_tmode_tstate *tstate;
-
- tstate = ahc->enabled_targets[i];
- if (tstate != NULL) {
-#if AHC_TARGET_MODE
- int j;
-
- for (j = 0; j < AHC_NUM_LUNS; j++) {
- struct ahc_tmode_lstate *lstate;
-
- lstate = tstate->enabled_luns[j];
- if (lstate != NULL) {
- xpt_free_path(lstate->path);
- free(lstate, M_DEVBUF);
- }
- }
-#endif
- free(tstate, M_DEVBUF);
- }
- }
-#if AHC_TARGET_MODE
- if (ahc->black_hole != NULL) {
- xpt_free_path(ahc->black_hole->path);
- free(ahc->black_hole, M_DEVBUF);
- }
-#endif
- if (ahc->name != NULL)
- free(ahc->name, M_DEVBUF);
-#ifndef __FreeBSD__
- free(ahc, M_DEVBUF);
-#endif
- return;
-}
-
-void
-ahc_shutdown(void *arg)
-{
- struct ahc_softc *ahc;
- int i;
-
- ahc = (struct ahc_softc *)arg;
-
- /* This will reset most registers to 0, but not all */
- ahc_reset(ahc);
- 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);
-}
-
-/*
- * Reset the controller and record some information about it
- * that is only availabel just after a reset.
- */
-int
-ahc_reset(struct ahc_softc *ahc)
-{
- u_int sblkctl;
- u_int sxfrctl1_a, sxfrctl1_b;
- int wait;
-
- /*
- * 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.
- */
- ahc_pause(ahc);
- sxfrctl1_b = 0;
- if ((ahc->chip & AHC_CHIPID_MASK) == AHC_AIC7770) {
- u_int sblkctl;
-
- /*
- * Save channel B's settings in case this chip
- * is setup for TWIN channel operation.
- */
- 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);
-
- ahc_outb(ahc, HCNTRL, CHIPRST | ahc->pause);
-
- /*
- * Ensure that the reset has finished
- */
- wait = 1000;
- do {
- ahc_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);
- }
-
- /*
- * Reload sxfrctl1.
- *
- * We must always initialize STPWEN to 1 before we
- * restore the saved values. STPWEN is initialized
- * to a tri-state condition which can only be cleared
- * by turning it on.
- */
- 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);
-
-#ifdef AHC_DUMP_SEQ
- if (ahc->init_level == 0)
- ahc_dumpseq(ahc);
-#endif
-
- return (0);
-}
-
-/*
- * 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_BASE, i);
- if (ahc_inb(ahc, SCB_BASE) != i)
- break;
- ahc_outb(ahc, SCBPTR, 0);
- if (ahc_inb(ahc, SCB_BASE) != 0)
- break;
- }
- return (i);
-}
-
-static void
-ahc_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
-{
- bus_addr_t *baddr;
-
- baddr = (bus_addr_t *)arg;
- *baddr = segs->ds_addr;
-}
-
-static void
-ahc_build_free_scb_list(struct ahc_softc *ahc)
-{
- int i;
-
- 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 */
- if ((ahc->flags & AHC_PAGESCBS) != 0)
- ahc_outb(ahc, SCB_NEXT, i+1);
- else
- ahc_outb(ahc, SCB_NEXT, SCB_LIST_NULL);
-
- /* 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);
-}
-
-static int
-ahc_init_scbdata(struct ahc_softc *ahc)
-{
- struct scb_data *scb_data;
-
- 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_ALLOC,
- M_DEVBUF, M_NOWAIT);
- if (scb_data->scbarray == NULL)
- return (ENOMEM);
- memset(scb_data->scbarray, 0, sizeof(struct scb) * AHC_SCB_MAX_ALLOC);
-
- /* Determine the number of hardware SCBs and initialize them */
-
- scb_data->maxhscbs = ahc_probe_scbs(ahc);
- if ((ahc->flags & AHC_PAGESCBS) != 0) {
- /* SCB 0 heads the free list */
- ahc_outb(ahc, FREE_SCBH, 0);
- } else {
- ahc_outb(ahc, FREE_SCBH, SCB_LIST_NULL);
- }
-
- if (ahc->scb_data->maxhscbs == 0) {
- printf("%s: No SCB space found\n", ahc_name(ahc));
- return (ENXIO);
- }
-
- ahc_build_free_scb_list(ahc);
-
- /*
- * Create our DMA tags. These tags define the kinds of device
- * accessible 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.
- */
-
- /* DMA tag for our hardware scb structures */
- if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1,
- /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
- /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
- /*highaddr*/BUS_SPACE_MAXADDR,
- /*filter*/NULL, /*filterarg*/NULL,
- AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb),
- /*nsegments*/1,
- /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
- /*flags*/0, &scb_data->hscb_dmat) != 0) {
- goto error_exit;
- }
-
- scb_data->init_level++;
-
- /* Allocation for our hscbs */
- if (ahc_dmamem_alloc(ahc, scb_data->hscb_dmat,
- (void **)&scb_data->hscbs,
- BUS_DMA_NOWAIT, &scb_data->hscb_dmamap) != 0) {
- goto error_exit;
- }
-
- scb_data->init_level++;
-
- /* And permanently map them */
- ahc_dmamap_load(ahc, scb_data->hscb_dmat, scb_data->hscb_dmamap,
- scb_data->hscbs,
- AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb),
- ahc_dmamap_cb, &scb_data->hscb_busaddr, /*flags*/0);
-
- scb_data->init_level++;
-
- /* DMA tag for our sense buffers */
- if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1,
- /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
- /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
- /*highaddr*/BUS_SPACE_MAXADDR,
- /*filter*/NULL, /*filterarg*/NULL,
- AHC_SCB_MAX_ALLOC * sizeof(struct scsi_sense_data),
- /*nsegments*/1,
- /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
- /*flags*/0, &scb_data->sense_dmat) != 0) {
- goto error_exit;
- }
-
- scb_data->init_level++;
-
- /* Allocate them */
- if (ahc_dmamem_alloc(ahc, scb_data->sense_dmat,
- (void **)&scb_data->sense,
- BUS_DMA_NOWAIT, &scb_data->sense_dmamap) != 0) {
- goto error_exit;
- }
-
- scb_data->init_level++;
-
- /* And permanently map them */
- ahc_dmamap_load(ahc, scb_data->sense_dmat, scb_data->sense_dmamap,
- scb_data->sense,
- AHC_SCB_MAX_ALLOC * sizeof(struct scsi_sense_data),
- ahc_dmamap_cb, &scb_data->sense_busaddr, /*flags*/0);
-
- scb_data->init_level++;
-
- /* DMA tag for our S/G structures. We allocate in page sized chunks */
- if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1,
- /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
- /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
- /*highaddr*/BUS_SPACE_MAXADDR,
- /*filter*/NULL, /*filterarg*/NULL,
- PAGE_SIZE, /*nsegments*/1,
- /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
- /*flags*/0, &scb_data->sg_dmat) != 0) {
- goto error_exit;
- }
-
- scb_data->init_level++;
-
- /* Perform initial CCB allocation */
- memset(scb_data->hscbs, 0,
- AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb));
- ahc_alloc_scbs(ahc);
-
- if (scb_data->numscbs == 0) {
- printf("%s: ahc_init_scbdata - "
- "Unable to allocate initial scbs\n",
- ahc_name(ahc));
- goto error_exit;
- }
-
- /*
- * Tell the sequencer which SCB will be the next one it receives.
- */
- ahc->next_queued_scb = ahc_get_scb(ahc);
- ahc_outb(ahc, NEXT_QUEUED_SCB, ahc->next_queued_scb->hscb->tag);
-
- /*
- * Note that we were successfull
- */
- return (0);
-
-error_exit:
-
- return (ENOMEM);
-}
-
-static void
-ahc_fini_scbdata(struct ahc_softc *ahc)
-{
- struct scb_data *scb_data;
-
- scb_data = ahc->scb_data;
- if (scb_data == NULL)
- return;
-
- switch (scb_data->init_level) {
- default:
- case 7:
- {
- 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_dmamap_unload(ahc, scb_data->sg_dmat,
- sg_map->sg_dmamap);
- ahc_dmamem_free(ahc, scb_data->sg_dmat,
- sg_map->sg_vaddr,
- sg_map->sg_dmamap);
- free(sg_map, M_DEVBUF);
- }
- ahc_dma_tag_destroy(ahc, scb_data->sg_dmat);
- }
- case 6:
- ahc_dmamap_unload(ahc, scb_data->sense_dmat,
- scb_data->sense_dmamap);
- case 5:
- ahc_dmamem_free(ahc, scb_data->sense_dmat, scb_data->sense,
- scb_data->sense_dmamap);
- ahc_dmamap_destroy(ahc, scb_data->sense_dmat,
- scb_data->sense_dmamap);
- case 4:
- ahc_dma_tag_destroy(ahc, scb_data->sense_dmat);
- case 3:
- ahc_dmamap_unload(ahc, scb_data->hscb_dmat,
- scb_data->hscb_dmamap);
- case 2:
- ahc_dmamem_free(ahc, scb_data->hscb_dmat, scb_data->hscbs,
- scb_data->hscb_dmamap);
- ahc_dmamap_destroy(ahc, scb_data->hscb_dmat,
- scb_data->hscb_dmamap);
- case 1:
- ahc_dma_tag_destroy(ahc, scb_data->hscb_dmat);
- break;
- case 0:
- break;
- }
- if (scb_data->scbarray != NULL)
- free(scb_data->scbarray, M_DEVBUF);
-}
-
-void
-ahc_alloc_scbs(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_ALLOC)
- /* 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;
-
- /* Allocate S/G space for the next batch of SCBS */
- if (ahc_dmamem_alloc(ahc, scb_data->sg_dmat,
- (void **)&sg_map->sg_vaddr,
- BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) {
- free(sg_map, M_DEVBUF);
- return;
- }
-
- SLIST_INSERT_HEAD(&scb_data->sg_maps, sg_map, links);
-
- ahc_dmamap_load(ahc, scb_data->sg_dmat, sg_map->sg_dmamap,
- sg_map->sg_vaddr, PAGE_SIZE, ahc_dmamap_cb,
- &sg_map->sg_physaddr, /*flags*/0);
-
- segs = sg_map->sg_vaddr;
- physaddr = sg_map->sg_physaddr;
-
- newcount = (PAGE_SIZE / (AHC_NSEG * sizeof(struct ahc_dma_seg)));
- newcount = MIN(newcount, (AHC_SCB_MAX_ALLOC - scb_data->numscbs));
- for (i = 0; i < newcount; i++) {
- struct scb_platform_data *pdata;
-#ifndef __linux__
- int error;
-#endif
- pdata = (struct scb_platform_data *)malloc(sizeof(*pdata),
- M_DEVBUF, M_NOWAIT);
- if (pdata == NULL)
- break;
- next_scb->platform_data = pdata;
- next_scb->sg_map = sg_map;
- 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->ahc_softc = ahc;
- next_scb->flags = SCB_FREE;
-#ifndef __linux__
- error = ahc_dmamap_create(ahc, ahc->buffer_dmat, /*flags*/0,
- &next_scb->dmamap);
- if (error != 0)
- break;
-#endif
- next_scb->hscb = &scb_data->hscbs[scb_data->numscbs];
- next_scb->hscb->tag = ahc->scb_data->numscbs;
- SLIST_INSERT_HEAD(&ahc->scb_data->free_scbs,
- next_scb, links.sle);
- segs += AHC_NSEG;
- physaddr += (AHC_NSEG * sizeof(struct ahc_dma_seg));
- next_scb++;
- ahc->scb_data->numscbs++;
- }
-}
-
-void
-ahc_controller_info(struct ahc_softc *ahc, char *buf)
-{
- int len;
-
- len = sprintf(buf, "%s: ", ahc_chip_names[ahc->chip & AHC_CHIPID_MASK]);
- buf += len;
- if ((ahc->features & AHC_TWIN) != 0)
- len = sprintf(buf, "Twin Channel, A SCSI Id=%d, "
- "B SCSI Id=%d, primary %c, ",
- ahc->our_id, ahc->our_id_b,
- (ahc->flags & AHC_PRIMARY_CHANNEL) + 'A');
- else {
- const char *speed;
- const char *type;
-
- speed = "";
- if ((ahc->features & AHC_ULTRA) != 0) {
- speed = "Ultra ";
- } else if ((ahc->features & AHC_DT) != 0) {
- speed = "Ultra160 ";
- } else if ((ahc->features & AHC_ULTRA2) != 0) {
- speed = "Ultra2 ";
- }
- if ((ahc->features & AHC_WIDE) != 0) {
- type = "Wide";
- } else {
- type = "Single";
- }
- len = sprintf(buf, "%s%s Channel %c, SCSI Id=%d, ",
- speed, type, ahc->channel, ahc->our_id);
- }
- buf += len;
-
- if ((ahc->flags & AHC_PAGESCBS) != 0)
- sprintf(buf, "%d/%d SCBs",
- ahc->scb_data->maxhscbs, AHC_MAX_QUEUE);
- else
- sprintf(buf, "%d SCBs", ahc->scb_data->maxhscbs);
-}
-
-/*
- * Start the board, ready for normal operation
- */
-int
-ahc_init(struct ahc_softc *ahc)
-{
- int max_targ;
- 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;
- uint32_t physaddr;
-
-#ifdef AHC_DEBUG_SEQUENCER
- ahc->flags |= AHC_SEQUENCER_DEBUG;
-#endif
-
-#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
- max_targ = 15;
-
- /*
- * 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_INITIATORROLE;
-
- /*
- * Only allow target mode features if this unit has them enabled.
- */
- if ((AHC_TMODE_ENABLE & (0x1 << ahc->unit)) == 0)
- ahc->features &= ~AHC_TARGETMODE;
-
-#ifndef __linux__
- /* DMA tag for mapping buffers into device visible space. */
- if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1,
- /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
- /*lowaddr*/BUS_SPACE_MAXADDR,
- /*highaddr*/BUS_SPACE_MAXADDR,
- /*filter*/NULL, /*filterarg*/NULL,
- /*maxsize*/MAXBSIZE, /*nsegments*/AHC_NSEG,
- /*maxsegsz*/AHC_MAXTRANSFER_SIZE,
- /*flags*/BUS_DMA_ALLOCNOW,
- &ahc->buffer_dmat) != 0) {
- return (ENOMEM);
- }
-#endif
-
- ahc->init_level++;
-
- /*
- * 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 the qinfifo and qoutfifo.
- * The qinfifo and qoutfifo are composed of 256 1 byte elements.
- * When providing for the target mode role, we must additionally
- * provide space for the incoming target command fifo and an extra
- * byte to deal with a dma bug in some chip versions.
- */
- driver_data_size = 2 * 256 * sizeof(uint8_t);
- if ((ahc->features & AHC_TARGETMODE) != 0)
- driver_data_size += AHC_TMODE_CMDS * sizeof(struct target_cmd)
- + /*DMA WideOdd Bug Buffer*/1;
- if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1,
- /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1,
- /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
- /*highaddr*/BUS_SPACE_MAXADDR,
- /*filter*/NULL, /*filterarg*/NULL,
- driver_data_size,
- /*nsegments*/1,
- /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
- /*flags*/0, &ahc->shared_data_dmat) != 0) {
- return (ENOMEM);
- }
-
- ahc->init_level++;
-
- /* Allocation of driver data */
- if (ahc_dmamem_alloc(ahc, ahc->shared_data_dmat,
- (void **)&ahc->qoutfifo,
- BUS_DMA_NOWAIT, &ahc->shared_data_dmamap) != 0) {
- return (ENOMEM);
- }
-
- ahc->init_level++;
-
- /* And permanently map it in */
- ahc_dmamap_load(ahc, ahc->shared_data_dmat, ahc->shared_data_dmamap,
- ahc->qoutfifo, driver_data_size, ahc_dmamap_cb,
- &ahc->shared_data_busaddr, /*flags*/0);
-
- if ((ahc->features & AHC_TARGETMODE) != 0) {
- ahc->targetcmds = (struct target_cmd *)ahc->qoutfifo;
- ahc->qoutfifo = (uint8_t *)&ahc->targetcmds[AHC_TMODE_CMDS];
- ahc->dma_bug_buf = ahc->shared_data_busaddr
- + driver_data_size - 1;
- /* All target command blocks start out invalid. */
- for (i = 0; i < AHC_TMODE_CMDS; i++)
- ahc->targetcmds[i].cmd_valid = 0;
- ahc_sync_tqinfifo(ahc, BUS_DMASYNC_PREREAD);
- ahc->tqinfifonext = 1;
- ahc_outb(ahc, KERNEL_TQINPOS, ahc->tqinfifonext - 1);
- ahc_outb(ahc, TQINPOS, ahc->tqinfifonext);
- ahc->qoutfifo = (uint8_t *)&ahc->targetcmds[256];
- }
- ahc->qinfifo = &ahc->qoutfifo[256];
-
- ahc->init_level++;
-
- /* Allocate SCB data now that buffer_dmat is initialized */
- if (ahc->scb_data->maxhscbs == 0)
- if (ahc_init_scbdata(ahc) != 0)
- return (ENOMEM);
-
- /*
- * 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 ahc_tmode_tstate. "
- "Failing attach\n", ahc_name(ahc));
- return (ENOMEM);
- }
-
- if ((ahc->features & AHC_TWIN) != 0) {
- if (ahc_alloc_tstate(ahc, ahc->our_id_b, 'B') == NULL) {
- printf("%s: unable to allocate ahc_tmode_tstate. "
- "Failing attach\n", ahc_name(ahc));
- return (ENOMEM);
- }
- }
-
- ahc_outb(ahc, SEQ_FLAGS, 0);
- ahc_outb(ahc, SEQ_FLAGS2, 0);
-
- if (ahc->scb_data->maxhscbs < AHC_SCB_MAX_ALLOC) {
- ahc->flags |= AHC_PAGESCBS;
- } else {
- ahc->flags &= ~AHC_PAGESCBS;
- }
-
-#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
- */
- ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) | SELBUSB);
- term = (ahc->flags & AHC_TERM_ENB_B) != 0 ? STPWEN : 0;
- ahc_outb(ahc, SCSIID, ahc->our_id_b);
- scsi_conf = ahc_inb(ahc, SCSICONF + 1);
- ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL))
- |term|ahc->seltime_b|ENSTIMER|ACTNEGEN);
- if ((ahc->features & AHC_ULTRA2) != 0)
- ahc_outb(ahc, SIMODE0, ahc_inb(ahc, SIMODE0)|ENIOERR);
- ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR);
- ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN);
-
- if ((scsi_conf & RESET_SCSI) != 0
- && (ahc->flags & AHC_INITIATORROLE) != 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|ahc->seltime
- |ENSTIMER|ACTNEGEN);
- if ((ahc->features & AHC_ULTRA2) != 0)
- ahc_outb(ahc, SIMODE0, ahc_inb(ahc, SIMODE0)|ENIOERR);
- ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR);
- ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN);
-
- if ((scsi_conf & RESET_SCSI) != 0
- && (ahc->flags & AHC_INITIATORROLE) != 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 ahc_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 */
- memset(tinfo, 0, 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;
- uint16_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);
- if ((scsirate & ~WIDEXFER) == 0 && offset != 0)
- /* Set to the lowest sync rate, 5MHz */
- scsirate |= 0x1c;
- 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;
- if ((scsirate & SXFR_ULTRA2) <= 8/*10MHz*/
- && (ahc->features & AHC_DT) != 0)
- tinfo->user.ppr_options =
- MSG_EXT_PPR_DT_REQ;
- } else if ((scsirate & SOFS) != 0) {
- if ((scsirate & SXFR) == 0x40
- && (ultraenb & mask) != 0) {
- /* Treat 10MHz as a non-ultra speed */
- scsirate &= ~SXFR;
- ultraenb &= ~mask;
- }
- 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 (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->user.protocol_version = 4;
- if ((ahc->features & AHC_DT) != 0)
- tinfo->user.transport_version = 3;
- else
- tinfo->user.transport_version = 2;
- tinfo->goal.protocol_version = 2;
- tinfo->goal.transport_version = 2;
- tinfo->curr.protocol_version = 2;
- tinfo->curr.transport_version = 2;
- }
- tstate->ultraenb = ultraenb;
- }
- ahc->user_discenable = discenable;
- ahc->user_tagenable = tagenable;
-
- /* There are no untagged SCBs active yet. */
- for (i = 0; i < 16; i++) {
- ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, 0));
- if ((ahc->flags & AHC_SCB_BTT) != 0) {
- int lun;
-
- /*
- * The SCB based BTT allows an entry per
- * target and lun pair.
- */
- for (lun = 1; lun < AHC_NUM_LUNS; lun++)
- ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, lun));
- }
- }
-
- /* All of our queues are empty */
- for (i = 0; i < 256; i++)
- ahc->qoutfifo[i] = SCB_LIST_NULL;
- ahc_sync_qoutfifo(ahc, BUS_DMASYNC_PREREAD);
-
- for (i = 0; i < 256; i++)
- ahc->qinfifo[i] = SCB_LIST_NULL;
-
- if ((ahc->features & AHC_MULTI_TID) != 0) {
- ahc_outb(ahc, TARGID, 0);
- ahc_outb(ahc, TARGID + 1, 0);
- }
-
- /*
- * 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, SHARED_DATA_ADDR, physaddr & 0xFF);
- ahc_outb(ahc, SHARED_DATA_ADDR + 1, (physaddr >> 8) & 0xFF);
- ahc_outb(ahc, SHARED_DATA_ADDR + 2, (physaddr >> 16) & 0xFF);
- ahc_outb(ahc, SHARED_DATA_ADDR + 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);
-
- /*
- * 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_INITIATORROLE) != 0)
- scsiseq_template |= ENRSELI;
- ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq_template);
-
- /*
- * Load the Sequencer program and Enable the adapter
- * in "fast" mode.
- */
- if (bootverbose)
- printf("%s: Downloading Sequencer Program...",
- ahc_name(ahc));
-
- ahc_loadseq(ahc);
-
- if ((ahc->features & AHC_ULTRA2) != 0) {
- int wait;
-
- /*
- * Wait for up to 500ms for our transceivers
- * to settle. If the adapter does not have
- * a cable attached, the tranceivers may
- * never settle, so don't complain if we
- * fail here.
- */
- ahc_pause(ahc);
- for (wait = 5000;
- (ahc_inb(ahc, SBLKCTL) & (ENAB40|ENAB20)) == 0 && wait;
- wait--)
- ahc_delay(100);
- ahc_unpause(ahc);
- }
- return (0);
-}
-
-void
-ahc_intr_enable(struct ahc_softc *ahc, int enable)
-{
- u_int hcntrl;
-
- hcntrl = ahc_inb(ahc, HCNTRL);
- hcntrl &= ~INTEN;
- ahc->pause &= ~INTEN;
- ahc->unpause &= ~INTEN;
- if (enable) {
- hcntrl |= INTEN;
- ahc->pause |= INTEN;
- ahc->unpause |= INTEN;
- }
- ahc_outb(ahc, HCNTRL, hcntrl);
-}
-
-/*
- * Ensure that the card is paused in a location
- * outside of all critical sections and that all
- * pending work is completed prior to returning.
- * This routine should only be called from outside
- * an interrupt context.
- */
-void
-ahc_pause_and_flushwork(struct ahc_softc *ahc)
-{
- int intstat;
- int maxloops;
-
- maxloops = 1000;
- ahc->flags |= AHC_ALL_INTERRUPTS;
- intstat = 0;
- do {
- ahc_intr(ahc);
- ahc_pause(ahc);
- ahc_clear_critical_section(ahc);
- if (intstat == 0xFF && (ahc->features & AHC_REMOVABLE) != 0)
- break;
- maxloops--;
- } while (((intstat = ahc_inb(ahc, INTSTAT)) & INT_PEND) && --maxloops);
- if (maxloops == 0) {
- printf("Infinite interrupt loop, INTSTAT = %x",
- ahc_inb(ahc, INTSTAT));
- }
- ahc_platform_flushwork(ahc);
- ahc->flags &= ~AHC_ALL_INTERRUPTS;
-}
-
-int
-ahc_suspend(struct ahc_softc *ahc)
-{
- uint8_t *ptr;
- int i;
-
- ahc_pause_and_flushwork(ahc);
-
- if (LIST_FIRST(&ahc->pending_scbs) != NULL)
- return (EBUSY);
-
-#if AHC_TARGET_MODE
- /*
- * XXX What about ATIOs that have not yet been serviced?
- * Perhaps we should just refuse to be suspended if we
- * are acting in a target role.
- */
- if (ahc->pending_device != NULL)
- return (EBUSY);
-#endif
-
- /* Save volatile registers */
- if ((ahc->features & AHC_TWIN) != 0) {
- ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) | SELBUSB);
- ahc->suspend_state.channel[1].scsiseq = ahc_inb(ahc, SCSISEQ);
- ahc->suspend_state.channel[1].sxfrctl0 = ahc_inb(ahc, SXFRCTL0);
- ahc->suspend_state.channel[1].sxfrctl1 = ahc_inb(ahc, SXFRCTL1);
- ahc->suspend_state.channel[1].simode0 = ahc_inb(ahc, SIMODE0);
- ahc->suspend_state.channel[1].simode1 = ahc_inb(ahc, SIMODE1);
- ahc->suspend_state.channel[1].seltimer = ahc_inb(ahc, SELTIMER);
- ahc->suspend_state.channel[1].seqctl = ahc_inb(ahc, SEQCTL);
- ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~SELBUSB);
- }
- ahc->suspend_state.channel[0].scsiseq = ahc_inb(ahc, SCSISEQ);
- ahc->suspend_state.channel[0].sxfrctl0 = ahc_inb(ahc, SXFRCTL0);
- ahc->suspend_state.channel[0].sxfrctl1 = ahc_inb(ahc, SXFRCTL1);
- ahc->suspend_state.channel[0].simode0 = ahc_inb(ahc, SIMODE0);
- ahc->suspend_state.channel[0].simode1 = ahc_inb(ahc, SIMODE1);
- ahc->suspend_state.channel[0].seltimer = ahc_inb(ahc, SELTIMER);
- ahc->suspend_state.channel[0].seqctl = ahc_inb(ahc, SEQCTL);
-
- if ((ahc->chip & AHC_PCI) != 0) {
- ahc->suspend_state.dscommand0 = ahc_inb(ahc, DSCOMMAND0);
- ahc->suspend_state.dspcistatus = ahc_inb(ahc, DSPCISTATUS);
- }
-
- if ((ahc->features & AHC_DT) != 0) {
- u_int sfunct;
-
- sfunct = ahc_inb(ahc, SFUNCT) & ~ALT_MODE;
- ahc_outb(ahc, SFUNCT, sfunct | ALT_MODE);
- ahc->suspend_state.optionmode = ahc_inb(ahc, OPTIONMODE);
- ahc_outb(ahc, SFUNCT, sfunct);
- ahc->suspend_state.crccontrol1 = ahc_inb(ahc, CRCCONTROL1);
- }
-
- if ((ahc->features & AHC_MULTI_FUNC) != 0)
- ahc->suspend_state.scbbaddr = ahc_inb(ahc, SCBBADDR);
-
- if ((ahc->features & AHC_ULTRA2) != 0)
- ahc->suspend_state.dff_thrsh = ahc_inb(ahc, DFF_THRSH);
-
- ptr = ahc->suspend_state.scratch_ram;
- for (i = 0; i < 64; i++)
- *ptr++ = ahc_inb(ahc, SRAM_BASE + i);
-
- if ((ahc->features & AHC_MORE_SRAM) != 0) {
- for (i = 0; i < 16; i++)
- *ptr++ = ahc_inb(ahc, TARG_OFFSET + i);
- }
-
- ptr = ahc->suspend_state.btt;
- if ((ahc->flags & AHC_SCB_BTT) != 0) {
- for (i = 0;i < AHC_NUM_TARGETS; i++) {
- int j;
-
- for (j = 0;j < AHC_NUM_LUNS; j++) {
- u_int tcl;
-
- tcl = BUILD_TCL(i << 4, j);
- *ptr = ahc_index_busy_tcl(ahc, tcl);
- }
- }
- }
- ahc_shutdown(ahc);
- return (0);
-}
-
-int
-ahc_resume(struct ahc_softc *ahc)
-{
- uint8_t *ptr;
- int i;
-
- ahc_reset(ahc);
-
- ahc_build_free_scb_list(ahc);
-
- /* Restore volatile registers */
- if ((ahc->features & AHC_TWIN) != 0) {
- ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) | SELBUSB);
- ahc_outb(ahc, SCSIID, ahc->our_id);
- ahc_outb(ahc, SCSISEQ, ahc->suspend_state.channel[1].scsiseq);
- ahc_outb(ahc, SXFRCTL0, ahc->suspend_state.channel[1].sxfrctl0);
- ahc_outb(ahc, SXFRCTL1, ahc->suspend_state.channel[1].sxfrctl1);
- ahc_outb(ahc, SIMODE0, ahc->suspend_state.channel[1].simode0);
- ahc_outb(ahc, SIMODE1, ahc->suspend_state.channel[1].simode1);
- ahc_outb(ahc, SELTIMER, ahc->suspend_state.channel[1].seltimer);
- ahc_outb(ahc, SEQCTL, ahc->suspend_state.channel[1].seqctl);
- ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~SELBUSB);
- }
- ahc_outb(ahc, SCSISEQ, ahc->suspend_state.channel[0].scsiseq);
- ahc_outb(ahc, SXFRCTL0, ahc->suspend_state.channel[0].sxfrctl0);
- ahc_outb(ahc, SXFRCTL1, ahc->suspend_state.channel[0].sxfrctl1);
- ahc_outb(ahc, SIMODE0, ahc->suspend_state.channel[0].simode0);
- ahc_outb(ahc, SIMODE1, ahc->suspend_state.channel[0].simode1);
- ahc_outb(ahc, SELTIMER, ahc->suspend_state.channel[0].seltimer);
- ahc_outb(ahc, SEQCTL, ahc->suspend_state.channel[0].seqctl);
- if ((ahc->features & AHC_ULTRA2) != 0)
- ahc_outb(ahc, SCSIID_ULTRA2, ahc->our_id);
- else
- ahc_outb(ahc, SCSIID, ahc->our_id);
-
- if ((ahc->chip & AHC_PCI) != 0) {
- ahc_outb(ahc, DSCOMMAND0, ahc->suspend_state.dscommand0);
- ahc_outb(ahc, DSPCISTATUS, ahc->suspend_state.dspcistatus);
- }
-
- if ((ahc->features & AHC_DT) != 0) {
- u_int sfunct;
-
- sfunct = ahc_inb(ahc, SFUNCT) & ~ALT_MODE;
- ahc_outb(ahc, SFUNCT, sfunct | ALT_MODE);
- ahc_outb(ahc, OPTIONMODE, ahc->suspend_state.optionmode);
- ahc_outb(ahc, SFUNCT, sfunct);
- ahc_outb(ahc, CRCCONTROL1, ahc->suspend_state.crccontrol1);
- }
-
- if ((ahc->features & AHC_MULTI_FUNC) != 0)
- ahc_outb(ahc, SCBBADDR, ahc->suspend_state.scbbaddr);
-
- if ((ahc->features & AHC_ULTRA2) != 0)
- ahc_outb(ahc, DFF_THRSH, ahc->suspend_state.dff_thrsh);
-
- ptr = ahc->suspend_state.scratch_ram;
- for (i = 0; i < 64; i++)
- ahc_outb(ahc, SRAM_BASE + i, *ptr++);
-
- if ((ahc->features & AHC_MORE_SRAM) != 0) {
- for (i = 0; i < 16; i++)
- ahc_outb(ahc, TARG_OFFSET + i, *ptr++);
- }
-
- ptr = ahc->suspend_state.btt;
- if ((ahc->flags & AHC_SCB_BTT) != 0) {
- for (i = 0;i < AHC_NUM_TARGETS; i++) {
- int j;
-
- for (j = 0;j < AHC_NUM_LUNS; j++) {
- u_int tcl;
-
- tcl = BUILD_TCL(i << 4, j);
- ahc_busy_tcl(ahc, tcl, *ptr);
- }
- }
- }
- return (0);
-}
-
-/************************** Busy Target Table *********************************/
-/*
- * Return the untagged transaction id for a given target/channel lun.
- * Optionally, clear the entry.
- */
-u_int
-ahc_index_busy_tcl(struct ahc_softc *ahc, u_int tcl)
-{
- u_int scbid;
- u_int target_offset;
-
- if ((ahc->flags & AHC_SCB_BTT) != 0) {
- u_int saved_scbptr;
-
- saved_scbptr = ahc_inb(ahc, SCBPTR);
- ahc_outb(ahc, SCBPTR, TCL_LUN(tcl));
- scbid = ahc_inb(ahc, SCB_64_BTT + TCL_TARGET_OFFSET(tcl));
- ahc_outb(ahc, SCBPTR, saved_scbptr);
- } else {
- target_offset = TCL_TARGET_OFFSET(tcl);
- scbid = ahc_inb(ahc, BUSY_TARGETS + target_offset);
- }
-
- return (scbid);
-}
-
-void
-ahc_unbusy_tcl(struct ahc_softc *ahc, u_int tcl)
-{
- u_int target_offset;
-
- if ((ahc->flags & AHC_SCB_BTT) != 0) {
- u_int saved_scbptr;
-
- saved_scbptr = ahc_inb(ahc, SCBPTR);
- ahc_outb(ahc, SCBPTR, TCL_LUN(tcl));
- ahc_outb(ahc, SCB_64_BTT+TCL_TARGET_OFFSET(tcl), SCB_LIST_NULL);
- ahc_outb(ahc, SCBPTR, saved_scbptr);
- } else {
- target_offset = TCL_TARGET_OFFSET(tcl);
- ahc_outb(ahc, BUSY_TARGETS + target_offset, SCB_LIST_NULL);
- }
-}
-
-void
-ahc_busy_tcl(struct ahc_softc *ahc, u_int tcl, u_int scbid)
-{
- u_int target_offset;
-
- if ((ahc->flags & AHC_SCB_BTT) != 0) {
- u_int saved_scbptr;
-
- saved_scbptr = ahc_inb(ahc, SCBPTR);
- ahc_outb(ahc, SCBPTR, TCL_LUN(tcl));
- ahc_outb(ahc, SCB_64_BTT + TCL_TARGET_OFFSET(tcl), scbid);
- ahc_outb(ahc, SCBPTR, saved_scbptr);
- } else {
- target_offset = TCL_TARGET_OFFSET(tcl);
- ahc_outb(ahc, BUSY_TARGETS + target_offset, scbid);
- }
-}
-
-/************************** SCB and SCB queue management **********************/
-int
-ahc_match_scb(struct ahc_softc *ahc, struct scb *scb, int target,
- char channel, int lun, u_int tag, role_t role)
-{
- int targ = SCB_GET_TARGET(ahc, scb);
- char chan = SCB_GET_CHANNEL(ahc, scb);
- int slun = SCB_GET_LUN(scb);
- int match;
-
- match = ((chan == channel) || (channel == ALL_CHANNELS));
- if (match != 0)
- match = ((targ == target) || (target == CAM_TARGET_WILDCARD));
- if (match != 0)
- match = ((lun == slun) || (lun == CAM_LUN_WILDCARD));
- if (match != 0) {
-#if AHC_TARGET_MODE
- int group;
-
- group = XPT_FC_GROUP(scb->io_ctx->ccb_h.func_code);
- if (role == ROLE_INITIATOR) {
- match = (group != XPT_FC_GROUP_TMODE)
- && ((tag == scb->hscb->tag)
- || (tag == SCB_LIST_NULL));
- } else if (role == ROLE_TARGET) {
- match = (group == XPT_FC_GROUP_TMODE)
- && ((tag == scb->io_ctx->csio.tag_id)
- || (tag == SCB_LIST_NULL));
- }
-#else /* !AHC_TARGET_MODE */
- match = ((tag == scb->hscb->tag) || (tag == SCB_LIST_NULL));
-#endif /* AHC_TARGET_MODE */
- }
-
- return match;
-}
-
-void
-ahc_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
-{
- int target;
- char channel;
- int lun;
-
- target = SCB_GET_TARGET(ahc, scb);
- lun = SCB_GET_LUN(scb);
- channel = SCB_GET_CHANNEL(ahc, scb);
-
- ahc_search_qinfifo(ahc, target, channel, lun,
- /*tag*/SCB_LIST_NULL, ROLE_UNKNOWN,
- CAM_REQUEUE_REQ, SEARCH_COMPLETE);
-
- ahc_platform_freeze_devq(ahc, scb);
-}
-
-void
-ahc_qinfifo_requeue_tail(struct ahc_softc *ahc, struct scb *scb)
-{
- struct scb *prev_scb;
-
- prev_scb = NULL;
- if (ahc_qinfifo_count(ahc) != 0) {
- u_int prev_tag;
- uint8_t prev_pos;
-
- prev_pos = ahc->qinfifonext - 1;
- prev_tag = ahc->qinfifo[prev_pos];
- prev_scb = ahc_lookup_scb(ahc, prev_tag);
- }
- ahc_qinfifo_requeue(ahc, prev_scb, scb);
- if ((ahc->features & AHC_QUEUE_REGS) != 0) {
- ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext);
- } else {
- ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext);
- }
-}
-
-static void
-ahc_qinfifo_requeue(struct ahc_softc *ahc, struct scb *prev_scb,
- struct scb *scb)
-{
- if (prev_scb == NULL) {
- ahc_outb(ahc, NEXT_QUEUED_SCB, scb->hscb->tag);
- } else {
- prev_scb->hscb->next = scb->hscb->tag;
- ahc_sync_scb(ahc, prev_scb,
- BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
- }
- ahc->qinfifo[ahc->qinfifonext++] = scb->hscb->tag;
- scb->hscb->next = ahc->next_queued_scb->hscb->tag;
- ahc_sync_scb(ahc, scb, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
-}
-
-static int
-ahc_qinfifo_count(struct ahc_softc *ahc)
-{
- u_int8_t qinpos;
- u_int8_t diff;
-
- if ((ahc->features & AHC_QUEUE_REGS) != 0) {
- qinpos = ahc_inb(ahc, SNSCB_QOFF);
- ahc_outb(ahc, SNSCB_QOFF, qinpos);
- } else
- qinpos = ahc_inb(ahc, QINPOS);
- diff = ahc->qinfifonext - qinpos;
- return (diff);
-}
-
-int
-ahc_search_qinfifo(struct ahc_softc *ahc, int target, char channel,
- int lun, u_int tag, role_t role, uint32_t status,
- ahc_search_action action)
-{
- struct scb *scb;
- struct scb *prev_scb;
- uint8_t qinstart;
- uint8_t qinpos;
- uint8_t qintail;
- uint8_t next, prev;
- uint8_t curscbptr;
- int found;
- int maxtarget;
- int i;
- int have_qregs;
-
- qintail = ahc->qinfifonext;
- have_qregs = (ahc->features & AHC_QUEUE_REGS) != 0;
- if (have_qregs) {
- qinstart = ahc_inb(ahc, SNSCB_QOFF);
- ahc_outb(ahc, SNSCB_QOFF, qinstart);
- } else
- qinstart = ahc_inb(ahc, QINPOS);
- qinpos = qinstart;
- next = ahc_inb(ahc, NEXT_QUEUED_SCB);
- found = 0;
- prev_scb = NULL;
-
- if (action == SEARCH_COMPLETE) {
- /*
- * Don't attempt to run any queued untagged transactions
- * until we are done with the abort process.
- */
- ahc_freeze_untagged_queues(ahc);
- }
-
- /*
- * 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;
- ahc_outb(ahc, NEXT_QUEUED_SCB, ahc->next_queued_scb->hscb->tag);
-
- while (qinpos != qintail) {
- scb = ahc_lookup_scb(ahc, ahc->qinfifo[qinpos]);
- if (scb == NULL) {
- printf("qinpos = %d, SCB index = %d\n",
- qinpos, ahc->qinfifo[qinpos]);
- panic("Loop 1\n");
- }
-
- if (ahc_match_scb(ahc, scb, target, channel, lun, tag, role)) {
- /*
- * We found an scb that needs to be acted on.
- */
- found++;
- switch (action) {
- case SEARCH_COMPLETE:
- {
- cam_status ostat;
- cam_status cstat;
-
- ostat = ahc_get_transaction_status(scb);
- if (ostat == CAM_REQ_INPROG)
- ahc_set_transaction_status(scb,
- status);
- cstat = ahc_get_transaction_status(scb);
- if (cstat != CAM_REQ_CMP)
- ahc_freeze_scb(scb);
- if ((scb->flags & SCB_ACTIVE) == 0)
- printf("Inactive SCB in qinfifo\n");
- ahc_done(ahc, scb);
-
- /* FALLTHROUGH */
- case SEARCH_REMOVE:
- break;
- }
- case SEARCH_COUNT:
- ahc_qinfifo_requeue(ahc, prev_scb, scb);
- prev_scb = scb;
- break;
- }
- } else {
- ahc_qinfifo_requeue(ahc, prev_scb, scb);
- prev_scb = scb;
- }
- qinpos++;
- }
-
- if ((ahc->features & AHC_QUEUE_REGS) != 0) {
- ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext);
- } else {
- ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext);
- }
-
- if (action != SEARCH_COUNT
- && (found != 0)
- && (qinstart != ahc->qinfifonext)) {
- /*
- * The sequencer may be in the process of dmaing
- * down the SCB at the beginning of the queue.
- * This could be problematic if either the first,
- * or the second SCB is removed from the queue
- * (the first SCB includes a pointer to the "next"
- * SCB to dma). If we have removed any entries, swap
- * the first element in the queue with the next HSCB
- * so the sequencer will notice that NEXT_QUEUED_SCB
- * has changed during its dma attempt and will retry
- * the DMA.
- */
- scb = ahc_lookup_scb(ahc, ahc->qinfifo[qinstart]);
-
- if (scb == NULL) {
- printf("found = %d, qinstart = %d, qinfifionext = %d\n",
- found, qinstart, ahc->qinfifonext);
- panic("First/Second Qinfifo fixup\n");
- }
- /*
- * ahc_swap_with_next_hscb forces our next pointer to
- * point to the reserved SCB for future commands. Save
- * and restore our original next pointer to maintain
- * queue integrity.
- */
- next = scb->hscb->next;
- ahc->scb_data->scbindex[scb->hscb->tag] = NULL;
- ahc_swap_with_next_hscb(ahc, scb);
- scb->hscb->next = next;
- ahc->qinfifo[qinstart] = scb->hscb->tag;
-
- /* Tell the card about the new head of the qinfifo. */
- ahc_outb(ahc, NEXT_QUEUED_SCB, scb->hscb->tag);
-
- /* Fixup the tail "next" pointer. */
- qintail = ahc->qinfifonext - 1;
- scb = ahc_lookup_scb(ahc, ahc->qinfifo[qintail]);
- scb->hscb->next = ahc->next_queued_scb->hscb->tag;
- }
-
- /*
- * Search waiting for selection list.
- */
- curscbptr = ahc_inb(ahc, SCBPTR);
- next = ahc_inb(ahc, WAITING_SCBH); /* Start at head of list. */
- prev = SCB_LIST_NULL;
-
- while (next != SCB_LIST_NULL) {
- uint8_t scb_index;
-
- ahc_outb(ahc, SCBPTR, next);
- scb_index = ahc_inb(ahc, SCB_TAG);
- if (scb_index >= ahc->scb_data->numscbs) {
- printf("Waiting List inconsistency. "
- "SCB index == %d, yet numscbs == %d.",
- scb_index, ahc->scb_data->numscbs);
- ahc_dump_card_state(ahc);
- panic("for safety");
- }
- scb = ahc_lookup_scb(ahc, scb_index);
- if (scb == NULL) {
- printf("scb_index = %d, next = %d\n",
- scb_index, next);
- panic("Waiting List traversal\n");
- }
- if (ahc_match_scb(ahc, scb, target, channel,
- lun, SCB_LIST_NULL, role)) {
- /*
- * We found an scb that needs to be acted on.
- */
- found++;
- switch (action) {
- case SEARCH_COMPLETE:
- {
- cam_status ostat;
- cam_status cstat;
-
- ostat = ahc_get_transaction_status(scb);
- if (ostat == CAM_REQ_INPROG)
- ahc_set_transaction_status(scb,
- status);
- cstat = ahc_get_transaction_status(scb);
- if (cstat != CAM_REQ_CMP)
- ahc_freeze_scb(scb);
- if ((scb->flags & SCB_ACTIVE) == 0)
- printf("Inactive SCB in Waiting List\n");
- ahc_done(ahc, scb);
- /* FALLTHROUGH */
- }
- case SEARCH_REMOVE:
- next = ahc_rem_wscb(ahc, next, prev);
- break;
- case SEARCH_COUNT:
- prev = next;
- next = ahc_inb(ahc, SCB_NEXT);
- break;
- }
- } else {
-
- prev = next;
- next = ahc_inb(ahc, SCB_NEXT);
- }
- }
- ahc_outb(ahc, SCBPTR, curscbptr);
-
- /*
- * And lastly, the untagged holding queues.
- */
- i = 0;
- if ((ahc->flags & AHC_SCB_BTT) == 0) {
-
- maxtarget = 16;
- if (target != CAM_TARGET_WILDCARD) {
-
- i = target;
- if (channel == 'B')
- i += 8;
- maxtarget = i + 1;
- }
- } else {
- maxtarget = 0;
- }
-
- for (; i < maxtarget; i++) {
- struct scb_tailq *untagged_q;
- struct scb *next_scb;
-
- untagged_q = &(ahc->untagged_queues[i]);
- next_scb = TAILQ_FIRST(untagged_q);
- while (next_scb != NULL) {
-
- scb = next_scb;
- next_scb = TAILQ_NEXT(scb, links.tqe);
-
- /*
- * The head of the list may be the currently
- * active untagged command for a device.
- * We're only searching for commands that
- * have not been started. A transaction
- * marked active but still in the qinfifo
- * is removed by the qinfifo scanning code
- * above.
- */
- if ((scb->flags & SCB_ACTIVE) != 0)
- continue;
-
- if (ahc_match_scb(ahc, scb, target, channel,
- lun, SCB_LIST_NULL, role)) {
- /*
- * We found an scb that needs to be acted on.
- */
- found++;
- switch (action) {
- case SEARCH_COMPLETE:
- {
- cam_status ostat;
- cam_status cstat;
-
- ostat = ahc_get_transaction_status(scb);
- if (ostat == CAM_REQ_INPROG)
- ahc_set_transaction_status(scb,
- status);
- cstat = ahc_get_transaction_status(scb);
- if (cstat != CAM_REQ_CMP)
- ahc_freeze_scb(scb);
- if ((scb->flags & SCB_ACTIVE) == 0)
- printf("Inactive SCB in untaggedQ\n");
- ahc_done(ahc, scb);
- break;
- }
- case SEARCH_REMOVE:
- TAILQ_REMOVE(untagged_q, scb,
- links.tqe);
- break;
- case SEARCH_COUNT:
- break;
- }
- }
- }
- }
-
- if (action == SEARCH_COMPLETE)
- ahc_release_untagged_queues(ahc);
- return (found);
-}
-
-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) {
- printf("Disconnected List inconsistency. "
- "SCB index == %d, yet numscbs == %d.",
- scb_index, ahc->scb_data->numscbs);
- ahc_dump_card_state(ahc);
- panic("for safety");
- }
-
- if (next == prev) {
- panic("Disconnected List Loop. "
- "cur SCBPTR == %x, prev SCBPTR == %x.",
- next, prev);
- }
- scbp = ahc_lookup_scb(ahc, scb_index);
- if (ahc_match_scb(ahc, 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);
-}
-
-/*
- * Remove an SCB from the on chip list of disconnected transactions.
- * This is empty/unused if we are not performing SCB paging.
- */
-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);
-}
-
-/*
- * Add the SCB as selected by SCBPTR onto the on chip list of
- * free hardware SCBs. This list is empty/unused if we are not
- * performing SCB paging.
- */
-static void
-ahc_add_curscb_to_free_list(struct ahc_softc *ahc)
-{
- /*
- * Invalidate the tag so that our abort
- * routines don't think it's active.
- */
- ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL);
-
- if ((ahc->flags & AHC_PAGESCBS) != 0) {
- 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_rem_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;
-}
-
-/******************************** Error Handling ******************************/
-/*
- * 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.
- */
-int
-ahc_abort_scbs(struct ahc_softc *ahc, int target, char channel,
- int lun, u_int tag, role_t role, uint32_t status)
-{
- struct scb *scbp;
- struct scb *scbp_next;
- u_int active_scb;
- int i, j;
- int maxtarget;
- int minlun;
- int maxlun;
-
- int found;
-
- /*
- * Don't attempt to run any queued untagged transactions
- * until we are done with the abort process.
- */
- ahc_freeze_untagged_queues(ahc);
-
- /* restore this when we're done */
- active_scb = ahc_inb(ahc, SCBPTR);
-
- found = ahc_search_qinfifo(ahc, target, channel, lun, SCB_LIST_NULL,
- role, CAM_REQUEUE_REQ, SEARCH_COMPLETE);
-
- /*
- * Clean out the busy target table for any untagged commands.
- */
- i = 0;
- maxtarget = 16;
- if (target != CAM_TARGET_WILDCARD) {
- i = target;
- if (channel == 'B')
- i += 8;
- maxtarget = i + 1;
- }
-
- if (lun == CAM_LUN_WILDCARD) {
-
- /*
- * Unless we are using an SCB based
- * busy targets table, there is only
- * one table entry for all luns of
- * a target.
- */
- minlun = 0;
- maxlun = 1;
- if ((ahc->flags & AHC_SCB_BTT) != 0)
- maxlun = AHC_NUM_LUNS;
- } else {
- minlun = lun;
- maxlun = lun + 1;
- }
-
- if (role != ROLE_TARGET) {
- for (;i < maxtarget; i++) {
- for (j = minlun;j < maxlun; j++) {
- u_int scbid;
- u_int tcl;
-
- tcl = BUILD_TCL(i << 4, j);
- scbid = ahc_index_busy_tcl(ahc, tcl);
- scbp = ahc_lookup_scb(ahc, scbid);
- if (scbp == NULL
- || ahc_match_scb(ahc, scbp, target, channel,
- lun, tag, role) == 0)
- continue;
- ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, j));
- }
- }
-
- /*
- * 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. In some cases, these remnants
- * might not still have mappings in the scbindex array (e.g. unexpected
- * bus free with the same scb queued for an abort). Don't hold this
- * against them.
- */
- 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_lookup_scb(ahc, scbid);
- if ((scbp == NULL && scbid != SCB_LIST_NULL)
- || (scbp != NULL
- && ahc_match_scb(ahc, 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 occurred.
- */
- scbp_next = LIST_FIRST(&ahc->pending_scbs);
- while (scbp_next != NULL) {
- scbp = scbp_next;
- scbp_next = LIST_NEXT(scbp, pending_links);
- if (ahc_match_scb(ahc, scbp, target, channel, lun, tag, role)) {
- cam_status ostat;
-
- ostat = ahc_get_transaction_status(scbp);
- if (ostat == CAM_REQ_INPROG)
- ahc_set_transaction_status(scbp, status);
- if (ahc_get_transaction_status(scbp) != CAM_REQ_CMP)
- ahc_freeze_scb(scbp);
- if ((scbp->flags & SCB_ACTIVE) == 0)
- printf("Inactive SCB on pending list\n");
- ahc_done(ahc, scbp);
- found++;
- }
- }
- ahc_outb(ahc, SCBPTR, active_scb);
- ahc_platform_abort_scbs(ahc, target, channel, lun, tag, role, status);
- ahc_release_untagged_queues(ahc);
- return found;
-}
-
-static void
-ahc_reset_current_bus(struct ahc_softc *ahc)
-{
- uint8_t scsiseq;
-
- ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENSCSIRST);
- scsiseq = ahc_inb(ahc, SCSISEQ);
- ahc_outb(ahc, SCSISEQ, scsiseq | SCSIRSTO);
- ahc_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);
-}
-
-int
-ahc_reset_channel(struct ahc_softc *ahc, char channel, int initiate_reset)
-{
- struct ahc_devinfo devinfo;
- u_int initiator, target, max_scsiid;
- u_int sblkctl;
- u_int scsiseq;
- u_int simode1;
- int found;
- int restart_needed;
- char cur_channel;
-
- ahc->pending_device = NULL;
-
- ahc_compile_devinfo(&devinfo,
- CAM_TARGET_WILDCARD,
- CAM_TARGET_WILDCARD,
- CAM_LUN_WILDCARD,
- channel, ROLE_UNKNOWN);
- ahc_pause(ahc);
-
- /* Make sure the sequencer is in a safe location. */
- ahc_clear_critical_section(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);
-#if AHC_TARGET_MODE
- if ((ahc->flags & AHC_TARGETROLE) != 0) {
- ahc_run_tqinfifo(ahc, /*paused*/TRUE);
- }
-#endif
-
- /*
- * 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';
- scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE);
- 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);
- simode1 = ahc_inb(ahc, SIMODE1) & ~(ENBUSFREE|ENSCSIRST);
- ahc_outb(ahc, SIMODE1, simode1);
- if (initiate_reset)
- ahc_reset_current_bus(ahc);
- ahc_clear_intstat(ahc);
-#if AHC_TARGET_MODE
- /*
- * Bus resets clear ENSELI, so we cannot
- * defer re-enabling bus reset interrupts
- * if we are in target mode.
- */
- if ((ahc->flags & AHC_TARGETROLE) != 0)
- ahc_outb(ahc, SIMODE1, simode1 | ENSCSIRST);
-#endif
- ahc_outb(ahc, SCSISEQ, scsiseq & (ENSELI|ENRSELI|ENAUTOATNP));
- 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);
- simode1 = ahc_inb(ahc, SIMODE1) & ~(ENBUSFREE|ENSCSIRST);
- ahc_outb(ahc, SIMODE1, simode1);
- if (initiate_reset)
- ahc_reset_current_bus(ahc);
- ahc_clear_intstat(ahc);
-#if AHC_TARGET_MODE
- /*
- * Bus resets clear ENSELI, so we cannot
- * defer re-enabling bus reset interrupts
- * if we are in target mode.
- */
- if ((ahc->flags & AHC_TARGETROLE) != 0)
- ahc_outb(ahc, SIMODE1, simode1 | ENSCSIRST);
-#endif
- ahc_outb(ahc, SCSISEQ, scsiseq & (ENSELI|ENRSELI|ENAUTOATNP));
- restart_needed = TRUE;
- }
-
- /*
- * Clean up all the state information for the
- * pending transactions on this bus.
- */
- found = ahc_abort_scbs(ahc, CAM_TARGET_WILDCARD, channel,
- CAM_LUN_WILDCARD, SCB_LIST_NULL,
- ROLE_UNKNOWN, CAM_SCSI_BUS_RESET);
-
- max_scsiid = (ahc->features & AHC_WIDE) ? 15 : 7;
-
-#ifdef AHC_TARGET_MODE
- /*
- * Send an immediate notify ccb to all target more peripheral
- * drivers affected by this action.
- */
- for (target = 0; target <= max_scsiid; target++) {
- struct ahc_tmode_tstate* tstate;
- u_int lun;
-
- tstate = ahc->enabled_targets[target];
- if (tstate == NULL)
- continue;
- for (lun = 0; lun < AHC_NUM_LUNS; lun++) {
- struct ahc_tmode_lstate* lstate;
-
- lstate = tstate->enabled_luns[lun];
- if (lstate == NULL)
- continue;
-
- ahc_queue_lstate_event(ahc, lstate, CAM_TARGET_WILDCARD,
- EVENT_TYPE_BUS_RESET, /*arg*/0);
- ahc_send_lstate_events(ahc, lstate);
- }
- }
-#endif
- /* Notify the XPT that a bus reset occurred */
- ahc_send_async(ahc, devinfo.channel, CAM_TARGET_WILDCARD,
- CAM_LUN_WILDCARD, AC_BUS_RESET, NULL);
-
- /*
- * 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,
- CAM_LUN_WILDCARD,
- channel, ROLE_UNKNOWN);
- ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
- AHC_TRANS_CUR, /*paused*/TRUE);
- ahc_set_syncrate(ahc, &devinfo, /*syncrate*/NULL,
- /*period*/0, /*offset*/0,
- /*ppr_options*/0, AHC_TRANS_CUR,
- /*paused*/TRUE);
- }
- }
-
- if (restart_needed)
- ahc_restart(ahc);
- else
- ahc_unpause(ahc);
- return found;
-}
-
-
-/***************************** Residual Processing ****************************/
-/*
- * Calculate the residual for a just completed SCB.
- */
-void
-ahc_calc_residual(struct scb *scb)
-{
- struct hardware_scb *hscb;
- struct status_pkt *spkt;
- uint32_t sgptr;
- uint32_t resid_sgptr;
- uint32_t resid;
-
- /*
- * 5 cases.
- * 1) No residual.
- * SG_RESID_VALID clear in sgptr.
- * 2) Transferless command
- * 3) Never performed any transfers.
- * sgptr has SG_FULL_RESID set.
- * 4) No residual but target did not
- * save data pointers after the
- * last transfer, so sgptr was
- * never updated.
- * 5) We have a partial residual.
- * Use residual_sgptr to determine
- * where we are.
- */
-
- hscb = scb->hscb;
- sgptr = ahc_le32toh(hscb->sgptr);
- if ((sgptr & SG_RESID_VALID) == 0)
- /* Case 1 */
- return;
- sgptr &= ~SG_RESID_VALID;
-
- if ((sgptr & SG_LIST_NULL) != 0)
- /* Case 2 */
- return;
-
- spkt = &hscb->shared_data.status;
- resid_sgptr = ahc_le32toh(spkt->residual_sg_ptr);
- if ((sgptr & SG_FULL_RESID) != 0) {
- /* Case 3 */
- resid = ahc_get_transfer_length(scb);
- } else if ((resid_sgptr & SG_LIST_NULL) != 0) {
- /* Case 4 */
- return;
- } else if ((resid_sgptr & ~SG_PTR_MASK) != 0) {
- panic("Bogus resid sgptr value 0x%x\n", resid_sgptr);
- } else {
- struct ahc_dma_seg *sg;
-
- /*
- * Remainder of the SG where the transfer
- * stopped.
- */
- resid = ahc_le32toh(spkt->residual_datacnt) & AHC_SG_LEN_MASK;
- sg = ahc_sg_bus_to_virt(scb, resid_sgptr & SG_PTR_MASK);
-
- /* The residual sg_ptr always points to the next sg */
- sg--;
-
- /*
- * Add up the contents of all residual
- * SG segments that are after the SG where
- * the transfer stopped.
- */
- while ((ahc_le32toh(sg->len) & AHC_DMA_LAST_SEG) == 0) {
- sg++;
- resid += ahc_le32toh(sg->len) & AHC_SG_LEN_MASK;
- }
- }
- if ((scb->flags & SCB_SENSE) == 0)
- ahc_set_residual(scb, resid);
- else
- ahc_set_sense_residual(scb, resid);
-
-#ifdef AHC_DEBUG
- if ((ahc_debug & AHC_SHOWMISC) != 0) {
- ahc_print_path(ahc, scb);
- printf("Handled Residual of %d bytes\n", resid);
- }
-#endif
-}
-
-/******************************* Target Mode **********************************/
-#ifdef AHC_TARGET_MODE
-/*
- * Add a target mode event to this lun's queue
- */
-static void
-ahc_queue_lstate_event(struct ahc_softc *ahc, struct ahc_tmode_lstate *lstate,
- u_int initiator_id, u_int event_type, u_int event_arg)
-{
- struct ahc_tmode_event *event;
- int pending;
-
- xpt_freeze_devq(lstate->path, /*count*/1);
- if (lstate->event_w_idx >= lstate->event_r_idx)
- pending = lstate->event_w_idx - lstate->event_r_idx;
- else
- pending = AHC_TMODE_EVENT_BUFFER_SIZE + 1
- - (lstate->event_r_idx - lstate->event_w_idx);
-
- if (event_type == EVENT_TYPE_BUS_RESET
- || event_type == MSG_BUS_DEV_RESET) {
- /*
- * Any earlier events are irrelevant, so reset our buffer.
- * This has the effect of allowing us to deal with reset
- * floods (an external device holding down the reset line)
- * without losing the event that is really interesting.
- */
- lstate->event_r_idx = 0;
- lstate->event_w_idx = 0;
- xpt_release_devq(lstate->path, pending, /*runqueue*/FALSE);
- }
-
- if (pending == AHC_TMODE_EVENT_BUFFER_SIZE) {
- xpt_print_path(lstate->path);
- printf("immediate event %x:%x lost\n",
- lstate->event_buffer[lstate->event_r_idx].event_type,
- lstate->event_buffer[lstate->event_r_idx].event_arg);
- lstate->event_r_idx++;
- if (lstate->event_r_idx == AHC_TMODE_EVENT_BUFFER_SIZE)
- lstate->event_r_idx = 0;
- xpt_release_devq(lstate->path, /*count*/1, /*runqueue*/FALSE);
- }
-
- event = &lstate->event_buffer[lstate->event_w_idx];
- event->initiator_id = initiator_id;
- event->event_type = event_type;
- event->event_arg = event_arg;
- lstate->event_w_idx++;
- if (lstate->event_w_idx == AHC_TMODE_EVENT_BUFFER_SIZE)
- lstate->event_w_idx = 0;
-}
-
-/*
- * Send any target mode events queued up waiting
- * for immediate notify resources.
- */
-void
-ahc_send_lstate_events(struct ahc_softc *ahc, struct ahc_tmode_lstate *lstate)
-{
- struct ccb_hdr *ccbh;
- struct ccb_immed_notify *inot;
-
- while (lstate->event_r_idx != lstate->event_w_idx
- && (ccbh = SLIST_FIRST(&lstate->immed_notifies)) != NULL) {
- struct ahc_tmode_event *event;
-
- event = &lstate->event_buffer[lstate->event_r_idx];
- SLIST_REMOVE_HEAD(&lstate->immed_notifies, sim_links.sle);
- inot = (struct ccb_immed_notify *)ccbh;
- switch (event->event_type) {
- case EVENT_TYPE_BUS_RESET:
- ccbh->status = CAM_SCSI_BUS_RESET|CAM_DEV_QFRZN;
- break;
- default:
- ccbh->status = CAM_MESSAGE_RECV|CAM_DEV_QFRZN;
- inot->message_args[0] = event->event_type;
- inot->message_args[1] = event->event_arg;
- break;
- }
- inot->initiator_id = event->initiator_id;
- inot->sense_len = 0;
- xpt_done((union ccb *)inot);
- lstate->event_r_idx++;
- if (lstate->event_r_idx == AHC_TMODE_EVENT_BUFFER_SIZE)
- lstate->event_r_idx = 0;
- }
-}
-#endif
-
-/******************** Sequencer Program Patching/Download *********************/
-
-#ifdef AHC_DUMP_SEQ
-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++) {
- uint8_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 cs cs_table[num_critical_sections];
- u_int begin_set[num_critical_sections];
- u_int end_set[num_critical_sections];
- struct patch *cur_patch;
- u_int cs_count;
- u_int cur_cs;
- u_int i;
- int downloaded;
- u_int skip_addr;
- u_int sg_prefetch_cnt;
- uint8_t download_consts[7];
-
- /*
- * Start out with 0 critical sections
- * that apply to this firmware load.
- */
- cs_count = 0;
- cur_cs = 0;
- memset(begin_set, 0, sizeof(begin_set));
- memset(end_set, 0, sizeof(end_set));
-
- /* Setup downloadable constant table */
- download_consts[QOUTFIFO_OFFSET] = 0;
- if (ahc->targetcmds != NULL)
- download_consts[QOUTFIFO_OFFSET] += 32;
- download_consts[QINFIFO_OFFSET] = download_consts[QOUTFIFO_OFFSET] + 1;
- download_consts[CACHESIZE_MASK] = ahc->pci_cachesize - 1;
- download_consts[INVERTED_CACHESIZE_MASK] = ~(ahc->pci_cachesize - 1);
- sg_prefetch_cnt = ahc->pci_cachesize;
- if (sg_prefetch_cnt < (2 * sizeof(struct ahc_dma_seg)))
- sg_prefetch_cnt = 2 * sizeof(struct ahc_dma_seg);
- download_consts[SG_PREFETCH_CNT] = sg_prefetch_cnt;
- download_consts[SG_PREFETCH_ALIGN_MASK] = ~(sg_prefetch_cnt - 1);
- download_consts[SG_PREFETCH_ADDR_MASK] = (sg_prefetch_cnt - 1);
-
- 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;
- }
- /*
- * Move through the CS table until we find a CS
- * that might apply to this instruction.
- */
- for (; cur_cs < num_critical_sections; cur_cs++) {
- if (critical_sections[cur_cs].end <= i) {
- if (begin_set[cs_count] == TRUE
- && end_set[cs_count] == FALSE) {
- cs_table[cs_count].end = downloaded;
- end_set[cs_count] = TRUE;
- cs_count++;
- }
- continue;
- }
- if (critical_sections[cur_cs].begin <= i
- && begin_set[cs_count] == FALSE) {
- cs_table[cs_count].begin = downloaded;
- begin_set[cs_count] = TRUE;
- }
- break;
- }
- ahc_download_instr(ahc, i, download_consts);
- downloaded++;
- }
-
- ahc->num_critical_sections = cs_count;
- if (cs_count != 0) {
-
- cs_count *= sizeof(struct cs);
- ahc->critical_sections = malloc(cs_count, M_DEVBUF, M_NOWAIT);
- if (ahc->critical_sections == NULL)
- panic("ahc_loadseq: Could not malloc");
- memcpy(ahc->critical_sections, cs_table, cs_count);
- }
- ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE);
- ahc_restart(ahc);
-
- if (bootverbose)
- printf(" %d instructions downloaded\n", downloaded);
-}
-
-static int
-ahc_check_patch(struct ahc_softc *ahc, struct patch **start_patch,
- u_int start_instr, u_int *skip_addr)
-{
- struct patch *cur_patch;
- struct patch *last_patch;
- u_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, u_int instrptr, uint8_t *dconsts)
-{
- union ins_formats instr;
- struct ins_format1 *fmt1_ins;
- struct ins_format3 *fmt3_ins;
- u_int opcode;
-
- /*
- * The firmware is always compiled into a little endian format.
- */
- instr.integer = ahc_le32toh(*(uint32_t*)&seqprog[instrptr * 4]);
-
- 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;
- u_int skip_addr;
- u_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;
- if ((ahc->features & AHC_CMD_CHAN) == 0
- && opcode == AIC_OP_BMOV) {
- /*
- * Block move was added at the same time
- * as the command channel. Verify that
- * this is only a move of a single element
- * and convert the BMOV to a MOV
- * (AND with an immediate of FF).
- */
- if (fmt1_ins->immediate != 1)
- panic("%s: BMOV not supported\n",
- ahc_name(ahc));
- fmt1_ins->opcode = AIC_OP_AND;
- fmt1_ins->immediate = 0xff;
- }
- /* 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++) {
- uint32_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);
- }
- }
- /* The sequencer is a little endian cpu */
- instr.integer = ahc_htole32(instr.integer);
- ahc_outsb(ahc, SEQRAM, instr.bytes, 4);
- break;
- default:
- panic("Unknown opcode encountered in seq program");
- break;
- }
-}
-
-void
-ahc_dump_card_state(struct ahc_softc *ahc)
-{
- struct scb *scb;
- struct scb_tailq *untagged_q;
- int target;
- int maxtarget;
- int i;
- uint8_t last_phase;
- uint8_t qinpos;
- uint8_t qintail;
- uint8_t qoutpos;
- uint8_t scb_index;
- uint8_t saved_scbptr;
-
- saved_scbptr = ahc_inb(ahc, SCBPTR);
-
- last_phase = ahc_inb(ahc, LASTPHASE);
- printf("%s: Dumping Card State %s, at SEQADDR 0x%x\n",
- ahc_name(ahc), ahc_lookup_phase_entry(last_phase)->phasemsg,
- ahc_inb(ahc, SEQADDR0) | (ahc_inb(ahc, SEQADDR1) << 8));
- printf("ACCUM = 0x%x, SINDEX = 0x%x, DINDEX = 0x%x, ARG_2 = 0x%x\n",
- ahc_inb(ahc, ACCUM), ahc_inb(ahc, SINDEX), ahc_inb(ahc, DINDEX),
- ahc_inb(ahc, ARG_2));
- printf("HCNT = 0x%x\n", ahc_inb(ahc, HCNT));
- printf("SCSISEQ = 0x%x, SBLKCTL = 0x%x\n",
- ahc_inb(ahc, SCSISEQ), ahc_inb(ahc, SBLKCTL));
- printf(" DFCNTRL = 0x%x, DFSTATUS = 0x%x\n",
- ahc_inb(ahc, DFCNTRL), ahc_inb(ahc, DFSTATUS));
- printf("LASTPHASE = 0x%x, SCSISIGI = 0x%x, SXFRCTL0 = 0x%x\n",
- last_phase, ahc_inb(ahc, SCSISIGI), ahc_inb(ahc, SXFRCTL0));
- printf("SSTAT0 = 0x%x, SSTAT1 = 0x%x\n",
- ahc_inb(ahc, SSTAT0), ahc_inb(ahc, SSTAT1));
- if ((ahc->features & AHC_DT) != 0)
- printf("SCSIPHASE = 0x%x\n", ahc_inb(ahc, SCSIPHASE));
- printf("STACK == 0x%x, 0x%x, 0x%x, 0x%x\n",
- ahc_inb(ahc, STACK) | (ahc_inb(ahc, STACK) << 8),
- ahc_inb(ahc, STACK) | (ahc_inb(ahc, STACK) << 8),
- ahc_inb(ahc, STACK) | (ahc_inb(ahc, STACK) << 8),
- ahc_inb(ahc, STACK) | (ahc_inb(ahc, STACK) << 8));
- printf("SCB count = %d\n", ahc->scb_data->numscbs);
- printf("Kernel NEXTQSCB = %d\n", ahc->next_queued_scb->hscb->tag);
- printf("Card NEXTQSCB = %d\n", ahc_inb(ahc, NEXT_QUEUED_SCB));
- /* QINFIFO */
- printf("QINFIFO entries: ");
- if ((ahc->features & AHC_QUEUE_REGS) != 0) {
- qinpos = ahc_inb(ahc, SNSCB_QOFF);
- ahc_outb(ahc, SNSCB_QOFF, qinpos);
- } else
- qinpos = ahc_inb(ahc, QINPOS);
- qintail = ahc->qinfifonext;
- while (qinpos != qintail) {
- printf("%d ", ahc->qinfifo[qinpos]);
- qinpos++;
- }
- printf("\n");
-
- printf("Waiting Queue entries: ");
- scb_index = ahc_inb(ahc, WAITING_SCBH);
- i = 0;
- while (scb_index != SCB_LIST_NULL && i++ < 256) {
- ahc_outb(ahc, SCBPTR, scb_index);
- printf("%d:%d ", scb_index, ahc_inb(ahc, SCB_TAG));
- scb_index = ahc_inb(ahc, SCB_NEXT);
- }
- printf("\n");
-
- printf("Disconnected Queue entries: ");
- scb_index = ahc_inb(ahc, DISCONNECTED_SCBH);
- i = 0;
- while (scb_index != SCB_LIST_NULL && i++ < 256) {
- ahc_outb(ahc, SCBPTR, scb_index);
- printf("%d:%d ", scb_index, ahc_inb(ahc, SCB_TAG));
- scb_index = ahc_inb(ahc, SCB_NEXT);
- }
- printf("\n");
-
- ahc_sync_qoutfifo(ahc, BUS_DMASYNC_POSTREAD);
- printf("QOUTFIFO entries: ");
- qoutpos = ahc->qoutfifonext;
- i = 0;
- while (ahc->qoutfifo[qoutpos] != SCB_LIST_NULL && i++ < 256) {
- printf("%d ", ahc->qoutfifo[qoutpos]);
- qoutpos++;
- }
- printf("\n");
-
- printf("Sequencer Free SCB List: ");
- scb_index = ahc_inb(ahc, FREE_SCBH);
- i = 0;
- while (scb_index != SCB_LIST_NULL && i++ < 256) {
- ahc_outb(ahc, SCBPTR, scb_index);
- printf("%d ", scb_index);
- scb_index = ahc_inb(ahc, SCB_NEXT);
- }
- printf("\n");
-
- printf("Pending list: ");
- i = 0;
- LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) {
- if (i++ > 256)
- break;
- if (scb != LIST_FIRST(&ahc->pending_scbs))
- printf(", ");
- printf("%d", scb->hscb->tag);
- if ((ahc->flags & AHC_PAGESCBS) == 0) {
- ahc_outb(ahc, SCBPTR, scb->hscb->tag);
- printf("(0x%x, 0x%x)", ahc_inb(ahc, SCB_CONTROL),
- ahc_inb(ahc, SCB_TAG));
- }
- }
- printf("\n");
-
- printf("Kernel Free SCB list: ");
- i = 0;
- SLIST_FOREACH(scb, &ahc->scb_data->free_scbs, links.sle) {
- if (i++ > 256)
- break;
- printf("%d ", scb->hscb->tag);
- }
- printf("\n");
-
- maxtarget = (ahc->features & (AHC_WIDE|AHC_TWIN)) ? 15 : 7;
- for (target = 0; target <= maxtarget; target++) {
- untagged_q = &ahc->untagged_queues[target];
- if (TAILQ_FIRST(untagged_q) == NULL)
- continue;
- printf("Untagged Q(%d): ", target);
- i = 0;
- TAILQ_FOREACH(scb, untagged_q, links.tqe) {
- if (i++ > 256)
- break;
- printf("%d ", scb->hscb->tag);
- }
- printf("\n");
- }
-
- ahc_platform_dump_card_state(ahc);
- ahc_outb(ahc, SCBPTR, saved_scbptr);
-}
-
-/************************* Target Mode ****************************************/
-#ifdef AHC_TARGET_MODE
-cam_status
-ahc_find_tmode_devs(struct ahc_softc *ahc, struct cam_sim *sim, union ccb *ccb,
- struct ahc_tmode_tstate **tstate,
- struct ahc_tmode_lstate **lstate,
- int notfound_failure)
-{
-
- if ((ahc->features & AHC_TARGETMODE) == 0)
- return (CAM_REQ_INVALID);
-
- /*
- * Handle the 'black hole' device that sucks up
- * requests to unattached luns on enabled targets.
- */
- if (ccb->ccb_h.target_id == CAM_TARGET_WILDCARD
- && ccb->ccb_h.target_lun == CAM_LUN_WILDCARD) {
- *tstate = NULL;
- *lstate = ahc->black_hole;
- } else {
- u_int max_id;
-
- max_id = (ahc->features & AHC_WIDE) ? 15 : 7;
- if (ccb->ccb_h.target_id > max_id)
- return (CAM_TID_INVALID);
-
- if (ccb->ccb_h.target_lun >= AHC_NUM_LUNS)
- return (CAM_LUN_INVALID);
-
- *tstate = ahc->enabled_targets[ccb->ccb_h.target_id];
- *lstate = NULL;
- if (*tstate != NULL)
- *lstate =
- (*tstate)->enabled_luns[ccb->ccb_h.target_lun];
- }
-
- if (notfound_failure != 0 && *lstate == NULL)
- return (CAM_PATH_INVALID);
-
- return (CAM_REQ_CMP);
-}
-
-void
-ahc_handle_en_lun(struct ahc_softc *ahc, struct cam_sim *sim, union ccb *ccb)
-{
- struct ahc_tmode_tstate *tstate;
- struct ahc_tmode_lstate *lstate;
- struct ccb_en_lun *cel;
- cam_status status;
- u_int target;
- u_int lun;
- u_int target_mask;
- u_long s;
- char channel;
-
- status = ahc_find_tmode_devs(ahc, sim, ccb, &tstate, &lstate,
- /*notfound_failure*/FALSE);
-
- if (status != CAM_REQ_CMP) {
- ccb->ccb_h.status = status;
- return;
- }
-
- if ((ahc->features & AHC_MULTIROLE) != 0) {
- u_int our_id;
-
- if (cam_sim_bus(sim) == 0)
- our_id = ahc->our_id;
- else
- our_id = ahc->our_id_b;
-
- if (ccb->ccb_h.target_id != our_id) {
- if ((ahc->features & AHC_MULTI_TID) != 0
- && (ahc->flags & AHC_INITIATORROLE) != 0) {
- /*
- * Only allow additional targets if
- * the initiator role is disabled.
- * The hardware cannot handle a re-select-in
- * on the initiator id during a re-select-out
- * on a different target id.
- */
- status = CAM_TID_INVALID;
- } else if ((ahc->flags & AHC_INITIATORROLE) != 0
- || ahc->enabled_luns > 0) {
- /*
- * Only allow our target id to change
- * if the initiator role is not configured
- * and there are no enabled luns which
- * are attached to the currently registered
- * scsi id.
- */
- status = CAM_TID_INVALID;
- }
- }
- }
-
- if (status != CAM_REQ_CMP) {
- ccb->ccb_h.status = status;
- return;
- }
-
- /*
- * We now have an id that is valid.
- * If we aren't in target mode, switch modes.
- */
- if ((ahc->flags & AHC_TARGETROLE) == 0
- && ccb->ccb_h.target_id != CAM_TARGET_WILDCARD) {
- u_long s;
-
- printf("Configuring Target Mode\n");
- ahc_lock(ahc, &s);
- if (LIST_FIRST(&ahc->pending_scbs) != NULL) {
- ccb->ccb_h.status = CAM_BUSY;
- ahc_unlock(ahc, &s);
- return;
- }
- ahc->flags |= AHC_TARGETROLE;
- if ((ahc->features & AHC_MULTIROLE) == 0)
- ahc->flags &= ~AHC_INITIATORROLE;
- ahc_pause(ahc);
- ahc_loadseq(ahc);
- ahc_unlock(ahc, &s);
- }
- cel = &ccb->cel;
- target = ccb->ccb_h.target_id;
- lun = ccb->ccb_h.target_lun;
- channel = SIM_CHANNEL(ahc, sim);
- target_mask = 0x01 << target;
- if (channel == 'B')
- target_mask <<= 8;
-
- if (cel->enable != 0) {
- u_int scsiseq;
-
- /* Are we already enabled?? */
- if (lstate != NULL) {
- xpt_print_path(ccb->ccb_h.path);
- printf("Lun already enabled\n");
- ccb->ccb_h.status = CAM_LUN_ALRDY_ENA;
- return;
- }
-
- if (cel->grp6_len != 0
- || cel->grp7_len != 0) {
- /*
- * Don't (yet?) support vendor
- * specific commands.
- */
- ccb->ccb_h.status = CAM_REQ_INVALID;
- printf("Non-zero Group Codes\n");
- return;
- }
-
- /*
- * Seems to be okay.
- * Setup our data structures.
- */
- if (target != CAM_TARGET_WILDCARD && tstate == NULL) {
- tstate = ahc_alloc_tstate(ahc, target, channel);
- if (tstate == NULL) {
- xpt_print_path(ccb->ccb_h.path);
- printf("Couldn't allocate tstate\n");
- ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
- return;
- }
- }
- lstate = malloc(sizeof(*lstate), M_DEVBUF, M_NOWAIT);
- if (lstate == NULL) {
- xpt_print_path(ccb->ccb_h.path);
- printf("Couldn't allocate lstate\n");
- ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
- return;
- }
- memset(lstate, 0, sizeof(*lstate));
- status = xpt_create_path(&lstate->path, /*periph*/NULL,
- xpt_path_path_id(ccb->ccb_h.path),
- xpt_path_target_id(ccb->ccb_h.path),
- xpt_path_lun_id(ccb->ccb_h.path));
- if (status != CAM_REQ_CMP) {
- free(lstate, M_DEVBUF);
- xpt_print_path(ccb->ccb_h.path);
- printf("Couldn't allocate path\n");
- ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
- return;
- }
- SLIST_INIT(&lstate->accept_tios);
- SLIST_INIT(&lstate->immed_notifies);
- ahc_lock(ahc, &s);
- ahc_pause(ahc);
- if (target != CAM_TARGET_WILDCARD) {
- tstate->enabled_luns[lun] = lstate;
- ahc->enabled_luns++;
-
- if ((ahc->features & AHC_MULTI_TID) != 0) {
- u_int targid_mask;
-
- targid_mask = ahc_inb(ahc, TARGID)
- | (ahc_inb(ahc, TARGID + 1) << 8);
-
- targid_mask |= target_mask;
- ahc_outb(ahc, TARGID, targid_mask);
- ahc_outb(ahc, TARGID+1, (targid_mask >> 8));
-
- ahc_update_scsiid(ahc, targid_mask);
- } else {
- u_int our_id;
- char channel;
-
- channel = SIM_CHANNEL(ahc, sim);
- our_id = SIM_SCSI_ID(ahc, sim);
-
- /*
- * This can only happen if selections
- * are not enabled
- */
- if (target != our_id) {
- u_int sblkctl;
- char cur_channel;
- int swap;
-
- sblkctl = ahc_inb(ahc, SBLKCTL);
- cur_channel = (sblkctl & SELBUSB)
- ? 'B' : 'A';
- if ((ahc->features & AHC_TWIN) == 0)
- cur_channel = 'A';
- swap = cur_channel != channel;
- if (channel == 'A')
- ahc->our_id = target;
- else
- ahc->our_id_b = target;
-
- if (swap)
- ahc_outb(ahc, SBLKCTL,
- sblkctl ^ SELBUSB);
-
- ahc_outb(ahc, SCSIID, target);
-
- if (swap)
- ahc_outb(ahc, SBLKCTL, sblkctl);
- }
- }
- } else
- ahc->black_hole = lstate;
- /* Allow select-in operations */
- if (ahc->black_hole != NULL && ahc->enabled_luns > 0) {
- scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE);
- scsiseq |= ENSELI;
- ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq);
- scsiseq = ahc_inb(ahc, SCSISEQ);
- scsiseq |= ENSELI;
- ahc_outb(ahc, SCSISEQ, scsiseq);
- }
- ahc_unpause(ahc);
- ahc_unlock(ahc, &s);
- ccb->ccb_h.status = CAM_REQ_CMP;
- xpt_print_path(ccb->ccb_h.path);
- printf("Lun now enabled for target mode\n");
- } else {
- struct scb *scb;
- int i, empty;
-
- if (lstate == NULL) {
- ccb->ccb_h.status = CAM_LUN_INVALID;
- return;
- }
-
- ahc_lock(ahc, &s);
-
- ccb->ccb_h.status = CAM_REQ_CMP;
- LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) {
- struct ccb_hdr *ccbh;
-
- ccbh = &scb->io_ctx->ccb_h;
- if (ccbh->func_code == XPT_CONT_TARGET_IO
- && !xpt_path_comp(ccbh->path, ccb->ccb_h.path)){
- printf("CTIO pending\n");
- ccb->ccb_h.status = CAM_REQ_INVALID;
- ahc_unlock(ahc, &s);
- return;
- }
- }
-
- if (SLIST_FIRST(&lstate->accept_tios) != NULL) {
- printf("ATIOs pending\n");
- ccb->ccb_h.status = CAM_REQ_INVALID;
- }
-
- if (SLIST_FIRST(&lstate->immed_notifies) != NULL) {
- printf("INOTs pending\n");
- ccb->ccb_h.status = CAM_REQ_INVALID;
- }
-
- if (ccb->ccb_h.status != CAM_REQ_CMP) {
- ahc_unlock(ahc, &s);
- return;
- }
-
- xpt_print_path(ccb->ccb_h.path);
- printf("Target mode disabled\n");
- xpt_free_path(lstate->path);
- free(lstate, M_DEVBUF);
-
- ahc_pause(ahc);
- /* Can we clean up the target too? */
- if (target != CAM_TARGET_WILDCARD) {
- tstate->enabled_luns[lun] = NULL;
- ahc->enabled_luns--;
- for (empty = 1, i = 0; i < 8; i++)
- if (tstate->enabled_luns[i] != NULL) {
- empty = 0;
- break;
- }
-
- if (empty) {
- ahc_free_tstate(ahc, target, channel,
- /*force*/FALSE);
- if (ahc->features & AHC_MULTI_TID) {
- u_int targid_mask;
-
- targid_mask = ahc_inb(ahc, TARGID)
- | (ahc_inb(ahc, TARGID + 1)
- << 8);
-
- targid_mask &= ~target_mask;
- ahc_outb(ahc, TARGID, targid_mask);
- ahc_outb(ahc, TARGID+1,
- (targid_mask >> 8));
- ahc_update_scsiid(ahc, targid_mask);
- }
- }
- } else {
-
- ahc->black_hole = NULL;
-
- /*
- * We can't allow selections without
- * our black hole device.
- */
- empty = TRUE;
- }
- if (ahc->enabled_luns == 0) {
- /* Disallow select-in */
- u_int scsiseq;
-
- scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE);
- scsiseq &= ~ENSELI;
- ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq);
- scsiseq = ahc_inb(ahc, SCSISEQ);
- scsiseq &= ~ENSELI;
- ahc_outb(ahc, SCSISEQ, scsiseq);
-
- if ((ahc->features & AHC_MULTIROLE) == 0) {
- printf("Configuring Initiator Mode\n");
- ahc->flags &= ~AHC_TARGETROLE;
- ahc->flags |= AHC_INITIATORROLE;
- ahc_pause(ahc);
- ahc_loadseq(ahc);
- }
- }
- ahc_unpause(ahc);
- ahc_unlock(ahc, &s);
- }
-}
-
-static void
-ahc_update_scsiid(struct ahc_softc *ahc, u_int targid_mask)
-{
- u_int scsiid_mask;
- u_int scsiid;
-
- if ((ahc->features & AHC_MULTI_TID) == 0)
- panic("ahc_update_scsiid called on non-multitid unit\n");
-
- /*
- * Since we will rely on the the TARGID mask
- * for selection enables, ensure that OID
- * in SCSIID is not set to some other ID
- * that we don't want to allow selections on.
- */
- if ((ahc->features & AHC_ULTRA2) != 0)
- scsiid = ahc_inb(ahc, SCSIID_ULTRA2);
- else
- scsiid = ahc_inb(ahc, SCSIID);
- scsiid_mask = 0x1 << (scsiid & OID);
- if ((targid_mask & scsiid_mask) == 0) {
- u_int our_id;
-
- /* ffs counts from 1 */
- our_id = ffs(targid_mask);
- if (our_id == 0)
- our_id = ahc->our_id;
- else
- our_id--;
- scsiid &= TID;
- scsiid |= our_id;
- }
- if ((ahc->features & AHC_ULTRA2) != 0)
- ahc_outb(ahc, SCSIID_ULTRA2, scsiid);
- else
- ahc_outb(ahc, SCSIID, scsiid);
-}
-
-void
-ahc_run_tqinfifo(struct ahc_softc *ahc, int paused)
-{
- struct target_cmd *cmd;
-
- /*
- * If the card supports auto-access pause,
- * we can access the card directly regardless
- * of whether it is paused or not.
- */
- if ((ahc->features & AHC_AUTOPAUSE) != 0)
- paused = TRUE;
-
- ahc_sync_tqinfifo(ahc, BUS_DMASYNC_POSTREAD);
- while ((cmd = &ahc->targetcmds[ahc->tqinfifonext])->cmd_valid != 0) {
-
- /*
- * Only advance through the queue if we
- * have the resources to process the command.
- */
- if (ahc_handle_target_cmd(ahc, cmd) != 0)
- break;
-
- cmd->cmd_valid = 0;
- ahc_dmamap_sync(ahc, ahc->shared_data_dmat,
- ahc->shared_data_dmamap,
- ahc_targetcmd_offset(ahc, ahc->tqinfifonext),
- sizeof(struct target_cmd),
- BUS_DMASYNC_PREREAD);
- ahc->tqinfifonext++;
-
- /*
- * Lazily update our position in the target mode incoming
- * command queue as seen by the sequencer.
- */
- if ((ahc->tqinfifonext & (HOST_TQINPOS - 1)) == 1) {
- if ((ahc->features & AHC_HS_MAILBOX) != 0) {
- u_int hs_mailbox;
-
- hs_mailbox = ahc_inb(ahc, HS_MAILBOX);
- hs_mailbox &= ~HOST_TQINPOS;
- hs_mailbox |= ahc->tqinfifonext & HOST_TQINPOS;
- ahc_outb(ahc, HS_MAILBOX, hs_mailbox);
- } else {
- if (!paused)
- ahc_pause(ahc);
- ahc_outb(ahc, KERNEL_TQINPOS,
- ahc->tqinfifonext & HOST_TQINPOS);
- if (!paused)
- ahc_unpause(ahc);
- }
- }
- }
-}
-
-static int
-ahc_handle_target_cmd(struct ahc_softc *ahc, struct target_cmd *cmd)
-{
- struct ahc_tmode_tstate *tstate;
- struct ahc_tmode_lstate *lstate;
- struct ccb_accept_tio *atio;
- uint8_t *byte;
- int initiator;
- int target;
- int lun;
-
- initiator = SCSIID_TARGET(ahc, cmd->scsiid);
- target = SCSIID_OUR_ID(cmd->scsiid);
- lun = (cmd->identify & MSG_IDENTIFY_LUNMASK);
-
- byte = cmd->bytes;
- tstate = ahc->enabled_targets[target];
- lstate = NULL;
- if (tstate != NULL)
- lstate = tstate->enabled_luns[lun];
-
- /*
- * Commands for disabled luns go to the black hole driver.
- */
- if (lstate == NULL)
- lstate = ahc->black_hole;
-
- atio = (struct ccb_accept_tio*)SLIST_FIRST(&lstate->accept_tios);
- if (atio == NULL) {
- ahc->flags |= AHC_TQINFIFO_BLOCKED;
- /*
- * Wait for more ATIOs from the peripheral driver for this lun.
- */
- return (1);
- } else
- ahc->flags &= ~AHC_TQINFIFO_BLOCKED;
-#if 0
- printf("Incoming command from %d for %d:%d%s\n",
- initiator, target, lun,
- lstate == ahc->black_hole ? "(Black Holed)" : "");
-#endif
- SLIST_REMOVE_HEAD(&lstate->accept_tios, sim_links.sle);
-
- if (lstate == ahc->black_hole) {
- /* Fill in the wildcards */
- atio->ccb_h.target_id = target;
- atio->ccb_h.target_lun = lun;
- }
-
- /*
- * Package it up and send it off to
- * whomever has this lun enabled.
- */
- atio->sense_len = 0;
- atio->init_id = initiator;
- if (byte[0] != 0xFF) {
- /* Tag was included */
- atio->tag_action = *byte++;
- atio->tag_id = *byte++;
- atio->ccb_h.flags = CAM_TAG_ACTION_VALID;
- } else {
- atio->ccb_h.flags = 0;
- }
- byte++;
-
- /* Okay. Now determine the cdb size based on the command code */
- switch (*byte >> CMD_GROUP_CODE_SHIFT) {
- case 0:
- atio->cdb_len = 6;
- break;
- case 1:
- case 2:
- atio->cdb_len = 10;
- break;
- case 4:
- atio->cdb_len = 16;
- break;
- case 5:
- atio->cdb_len = 12;
- break;
- case 3:
- default:
- /* Only copy the opcode. */
- atio->cdb_len = 1;
- printf("Reserved or VU command code type encountered\n");
- break;
- }
-
- memcpy(atio->cdb_io.cdb_bytes, byte, atio->cdb_len);
-
- atio->ccb_h.status |= CAM_CDB_RECVD;
-
- if ((cmd->identify & MSG_IDENTIFY_DISCFLAG) == 0) {
- /*
- * We weren't allowed to disconnect.
- * We're hanging on the bus until a
- * continue target I/O comes in response
- * to this accept tio.
- */
-#if 0
- printf("Received Immediate Command %d:%d:%d - %p\n",
- initiator, target, lun, ahc->pending_device);
-#endif
- ahc->pending_device = lstate;
- ahc_freeze_ccb((union ccb *)atio);
- atio->ccb_h.flags |= CAM_DIS_DISCONNECT;
- }
- xpt_done((union ccb*)atio);
- return (0);
-}
-
-#endif
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)