patch-2.4.3 linux/drivers/scsi/aic7xxx/aic7xxx.c
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- Lines: 6674
- Date:
Sun Mar 4 14:30:18 2001
- Orig file:
v2.4.2/linux/drivers/scsi/aic7xxx/aic7xxx.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.4.2/linux/drivers/scsi/aic7xxx/aic7xxx.c linux/drivers/scsi/aic7xxx/aic7xxx.c
@@ -0,0 +1,6673 @@
+/*
+ * Core routines and tables shareable across OS platforms.
+ *
+ * Copyright (c) 1994-2001 Justin T. Gibbs.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU Public License ("GPL").
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $Id: //depot/src/aic7xxx/aic7xxx.c#32 $
+ *
+ * $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"
+};
+const u_int num_chip_names = NUM_ELEMENTS(ahc_chip_names);
+
+struct hard_error_entry hard_error[] = {
+ { ILLHADDR, "Illegal Host Access" },
+ { ILLSADDR, "Illegal Sequencer Address referrenced" },
+ { ILLOPCODE, "Illegal Opcode in sequencer program" },
+ { SQPARERR, "Sequencer Parity Error" },
+ { DPARERR, "Data-path Parity Error" },
+ { MPARERR, "Scratch or SCB Memory Parity Error" },
+ { PCIERRSTAT, "PCI Error detected" },
+ { CIOPARERR, "CIOBUS Parity Error" },
+};
+const u_int num_errors = NUM_ELEMENTS(hard_error);
+
+struct phase_table_entry 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.
+ */
+const u_int num_phases = NUM_ELEMENTS(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.
+ */
+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 struct 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_syncrates(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_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_handle_devreset(struct ahc_softc *ahc,
+ struct ahc_devinfo *devinfo,
+ cam_status status, char *message,
+ int verbose_level);
+
+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 int ahc_abort_scbs(struct ahc_softc *ahc, int target,
+ char channel, int lun, u_int tag,
+ role_t role, uint32_t status);
+static void ahc_reset_current_bus(struct ahc_softc *ahc);
+static void ahc_calc_residual(struct scb *scb);
+#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 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
+restart_sequencer(struct ahc_softc *ahc)
+{
+
+ pause_sequencer(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);
+
+ /*
+ * 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);
+ unpause_sequencer(ahc);
+}
+
+/************************* Input/Output Queues ********************************/
+void
+ahc_run_qoutfifo(struct ahc_softc *ahc)
+{
+ struct scb *scb;
+ u_int scb_index;
+
+ 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 incomming
+ * 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->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.
+ */
+ if (ahc_check_residual(scb) != 0)
+ ahc_calc_residual(scb);
+ else
+ ahc_set_residual(scb, 0);
+ 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, error, num_errors;
+
+ error = ahc_inb(ahc, ERROR);
+ num_errors = sizeof(hard_error)/sizeof(hard_error[0]);
+ for (i = 0; error != 1 && i < num_errors; i++)
+ error >>= 1;
+ printf("%s: brkadrint, %s at seqaddr = 0x%x\n",
+ ahc_name(ahc), hard_error[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:
+#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)) {
+ struct ahc_dma_seg *sg;
+ struct scsi_sense *sc;
+ struct ahc_initiator_tinfo *targ_info;
+ struct tmode_tstate *tstate;
+ struct ahc_transinfo *tinfo;
+
+ targ_info =
+ ahc_fetch_transinfo(ahc,
+ devinfo.channel,
+ devinfo.our_scsiid,
+ devinfo.target,
+ &tstate);
+ tinfo = &targ_info->current;
+ sg = scb->sg_list;
+ sc = (struct scsi_sense *)
+ (&hscb->shared_data.cdb);
+ /*
+ * Save off the residual if there is one.
+ */
+ if (ahc_check_residual(scb))
+ ahc_calc_residual(scb);
+ else
+ ahc_set_residual(scb, 0);
+#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;
+
+ /*
+ * XXX Still true???
+ * Would be nice to preserve DISCENB here,
+ * but due to the way we manage busy targets,
+ * we can't.
+ */
+ hscb->control = 0;
+
+ /*
+ * This request sense could be because the
+ * the device lost power or in some other
+ * way has lost our transfer negotiations.
+ * Renegotiate if appropriate. Unit attention
+ * errors will be reported before any data
+ * phases occur.
+ */
+ if (ahc_get_residual(scb)
+ == ahc_get_transfer_length(scb)) {
+ ahc_update_target_msg_request(ahc,
+ &devinfo,
+ targ_info,
+ /*force*/TRUE,
+ /*paused*/TRUE);
+ }
+ 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_outb(ahc, SCSISIGO, ahc_inb(ahc, LASTPHASE) | ATNO);
+ 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 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));
+ restart_sequencer(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) {
+ u_int bus_phase;
+
+ bus_phase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
+ if (bus_phase != P_MESGIN
+ && bus_phase != P_MESGOUT) {
+ printf("ahc_intr: HOST_MSG_LOOP bad "
+ "phase 0x%x\n",
+ bus_phase);
+ /*
+ * Probably transitioned to bus free before
+ * we got here. Just punt the message.
+ */
+ ahc_clear_intstat(ahc);
+ restart_sequencer(ahc);
+ return;
+ }
+
+ if (devinfo.role == ROLE_INITIATOR) {
+ struct scb *scb;
+ u_int scb_index;
+
+ scb_index = ahc_inb(ahc, SCB_TAG);
+ scb = ahc_lookup_scb(ahc, scb_index);
+
+ 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;
+ }
+ } else {
+ if (bus_phase == P_MESGOUT) {
+ ahc->msg_type =
+ MSG_TYPE_TARGET_MSGOUT;
+ ahc->msgin_index = 0;
+ }
+#if AHC_TARGET_MODE
+ else
+ ahc_setup_target_msgin(ahc, &devinfo);
+#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) {
+ 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 == phase_table[i].phase)
+ break;
+ }
+ ahc_print_path(ahc, scb);
+ printf("data overrun detected %s."
+ " Tag == 0x%x.\n",
+ 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 : Length %d\n",
+ i,
+ 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);
+ 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.
+ */
+ unpause_sequencer(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);
+ unpause_sequencer(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 == phase_table[i].phase)
+ break;
+ }
+ mesg_out = 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",
+ 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);
+ }
+ ahc_outb(ahc, CLRINT, CLRSCSIINT);
+ unpause_sequencer(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)) {
+ struct ahc_devinfo devinfo;
+#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 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->current.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 == phase_table[i].phase)
+ break;
+ }
+ printf("Unexpected busfree %s\n"
+ "SEQADDR == 0x%x\n",
+ phase_table[i].phasemsg, ahc_inb(ahc, SEQADDR0)
+ | (ahc_inb(ahc, SEQADDR1) << 8));
+ }
+ ahc_clear_msg_state(ahc);
+ ahc_outb(ahc, CLRINT, CLRSCSIINT);
+ restart_sequencer(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, 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 sucessful
+ * 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);
+ restart_sequencer(ahc);
+ } else {
+ printf("%s: Missing case in ahc_handle_scsiint. status = %x\n",
+ ahc_name(ahc), status);
+ ahc_outb(ahc, CLRINT, CLRSCSIINT);
+ }
+}
+
+#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);
+
+ 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 (!sequencer_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",
+ scb,
+ hscb->control,
+ hscb->scsiid,
+ hscb->lun,
+ hscb->cdb_len);
+ i = 0;
+ printf("Shared Data: %#02x %#02x %#02x %#02x\n",
+ hscb->shared_data.cdb[i++],
+ hscb->shared_data.cdb[i++],
+ hscb->shared_data.cdb[i++],
+ hscb->shared_data.cdb[i++]);
+ printf(" %#02x %#02x %#02x %#02x\n",
+ hscb->shared_data.cdb[i++],
+ hscb->shared_data.cdb[i++],
+ hscb->shared_data.cdb[i++],
+ hscb->shared_data.cdb[i++]);
+ printf(" %#02x %#02x %#02x %#02x\n",
+ hscb->shared_data.cdb[i++],
+ hscb->shared_data.cdb[i++],
+ hscb->shared_data.cdb[i++],
+ 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 : Length %d\n",
+ i,
+ 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 tmode_tstate *
+ahc_alloc_tstate(struct ahc_softc *ahc, u_int scsi_id, char channel)
+{
+ struct tmode_tstate *master_tstate;
+ struct tmode_tstate *tstate;
+ int i;
+
+ 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].current, 0,
+ sizeof(tstate->transinfo[i].current));
+ 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 tmode_tstate *tstate;
+
+ /* Don't clean up the entry for our initiator role */
+ if ((ahc->flags & AHC_INITIATORROLE) != 0
+ && ((channel == 'B' && scsi_id == ahc->our_id_b)
+ || (channel == 'A' && scsi_id == ahc->our_id))
+ && force == FALSE)
+ return;
+
+ if (channel == 'B')
+ scsi_id += 8;
+ tstate = ahc->enabled_targets[scsi_id];
+ if (tstate != NULL)
+ free(tstate, M_DEVBUF);
+ ahc->enabled_targets[scsi_id] = NULL;
+}
+#endif
+
+/*
+ * 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
+ && (ahc->flags & AHC_ULTRA_DISABLED) == 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;
+
+ 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;
+
+ /* Skip any DT entries if DT is not available */
+ if ((*ppr_options & MSG_EXT_PPR_DT_REQ) == 0
+ && (syncrate->sxfr_u2 & DT_SXFR) != 0)
+ continue;
+
+ 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.
+ */
+void
+ahc_update_target_msg_request(struct ahc_softc *ahc,
+ struct ahc_devinfo *devinfo,
+ struct ahc_initiator_tinfo *tinfo,
+ int force, int paused)
+{
+ u_int targ_msg_req_orig;
+
+ targ_msg_req_orig = ahc->targ_msg_req;
+ if (tinfo->current.period != tinfo->goal.period
+ || tinfo->current.width != tinfo->goal.width
+ || tinfo->current.offset != tinfo->goal.offset
+ || tinfo->current.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)))
+ ahc->targ_msg_req |= devinfo->target_mask;
+ else
+ ahc->targ_msg_req &= ~devinfo->target_mask;
+
+ if (ahc->targ_msg_req != targ_msg_req_orig) {
+ /* Update the message request bit for this target */
+ if (!paused)
+ pause_sequencer(ahc);
+
+ ahc_outb(ahc, TARGET_MSG_REQUEST,
+ ahc->targ_msg_req & 0xFF);
+ ahc_outb(ahc, TARGET_MSG_REQUEST + 1,
+ (ahc->targ_msg_req >> 8) & 0xFF);
+
+ if (!paused)
+ unpause_sequencer(ahc);
+ }
+}
+
+/*
+ * Update the user/goal/current 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 tmode_tstate *tstate;
+ u_int old_period;
+ u_int old_offset;
+ u_int old_ppr;
+ int active = (type & AHC_TRANS_ACTIVE) == AHC_TRANS_ACTIVE;
+
+ if (syncrate == NULL) {
+ period = 0;
+ offset = 0;
+ }
+
+ tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
+ devinfo->target, &tstate);
+
+ 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->current.period;
+ old_offset = tinfo->current.offset;
+ old_ppr = tinfo->current.ppr_options;
+
+ if ((type & AHC_TRANS_CUR) != 0
+ && (old_period != period
+ || old_offset != offset
+ || old_ppr != ppr_options)) {
+ u_int scsirate;
+
+ 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->current.period = period;
+ tinfo->current.offset = offset;
+ tinfo->current.ppr_options = ppr_options;
+
+ /* Update the syncrates in any pending scbs */
+ ahc_update_pending_syncrates(ahc);
+
+ ahc_send_async(ahc, devinfo->channel, devinfo->target,
+ CAM_LUN_WILDCARD, AC_TRANSFER_NEG);
+ 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);
+ }
+ }
+ }
+
+ ahc_update_target_msg_request(ahc, devinfo, tinfo,
+ /*force*/FALSE,
+ paused);
+}
+
+/*
+ * Update the user/goal/current 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 tmode_tstate *tstate;
+ u_int oldwidth;
+ int active = (type & AHC_TRANS_ACTIVE) == AHC_TRANS_ACTIVE;
+
+ tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
+ devinfo->target, &tstate);
+
+ if ((type & AHC_TRANS_USER) != 0)
+ tinfo->user.width = width;
+
+ if ((type & AHC_TRANS_GOAL) != 0)
+ tinfo->goal.width = width;
+
+ oldwidth = tinfo->current.width;
+ if ((type & AHC_TRANS_CUR) != 0 && oldwidth != width) {
+ u_int scsirate;
+
+ scsirate = tinfo->scsirate;
+ scsirate &= ~WIDEXFER;
+ if (width == MSG_EXT_WDTR_BUS_16_BIT)
+ scsirate |= WIDEXFER;
+
+ tinfo->scsirate = scsirate;
+
+ if (active)
+ ahc_outb(ahc, SCSIRATE, scsirate);
+
+ tinfo->current.width = width;
+
+ ahc_send_async(ahc, devinfo->channel, devinfo->target,
+ CAM_LUN_WILDCARD, AC_TRANSFER_NEG);
+ if (bootverbose) {
+ printf("%s: target %d using %dbit transfers\n",
+ ahc_name(ahc), devinfo->target,
+ 8 * (0x01 << width));
+ }
+ }
+
+ ahc_update_target_msg_request(ahc, devinfo, tinfo,
+ /*force*/FALSE, paused);
+}
+
+/*
+ * Update the current state of tagged queuing for a given target.
+ */
+void
+ahc_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, int enable)
+{
+ struct ahc_initiator_tinfo *tinfo;
+ struct tmode_tstate *tstate;
+ uint16_t orig_tagenable;
+
+ tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
+ devinfo->target, &tstate);
+
+ orig_tagenable = tstate->tagenable;
+ if (enable)
+ tstate->tagenable |= devinfo->target_mask;
+ else
+ tstate->tagenable &= ~devinfo->target_mask;
+
+ if (orig_tagenable != tstate->tagenable) {
+ ahc_platform_set_tags(ahc, devinfo, enable);
+ ahc_send_async(ahc, devinfo->channel, devinfo->target,
+ devinfo->lun, AC_TRANSFER_NEG);
+ }
+
+}
+
+/*
+ * 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_syncrates(struct ahc_softc *ahc)
+{
+ struct scb *pending_scb;
+ int pending_scb_count;
+ int i;
+ 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 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->current.offset;
+ pending_scb_count++;
+ }
+
+ if (pending_scb_count == 0)
+ return;
+
+ saved_scbptr = ahc_inb(ahc, SCBPTR);
+ /* Ensure that the hscbs down on the card match the new information */
+ for (i = 0; i < ahc->scb_data->maxhscbs; i++) {
+ 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;
+ if ((pending_hscb->control & ULTRAENB) != 0)
+ control |= ULTRAENB;
+ 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);
+}
+
+/**************************** 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);
+}
+
+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 ****************************/
+/*
+ * 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 ((ahc->targ_msg_req & devinfo->target_mask) != 0
+ || (scb->flags & 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);
+ 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 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);
+ dowide = tinfo->current.width != tinfo->goal.width;
+ dosync = tinfo->current.period != tinfo->goal.period;
+ doppr = tinfo->current.ppr_options != tinfo->goal.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->current.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)) {
+
+ period = tinfo->goal.period;
+ ppr_options = tinfo->goal.ppr_options;
+ if (use_ppr == 0)
+ ppr_options = 0;
+ rate = ahc_devlimited_syncrate(ahc, tinfo, &period,
+ &ppr_options, devinfo->role);
+ offset = tinfo->goal.offset;
+ ahc_validate_offset(ahc, tinfo, rate, &offset,
+ use_ppr ? tinfo->goal.width
+ : tinfo->current.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 negotiateion 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);
+}
+
+/*
+ * 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_outb(ahc, SCSISIGO, ahc_inb(ahc, SCSISIGO) | ATNO);
+ }
+
+ lastbyte = ahc->msgout_index == (ahc->msgout_len - 1);
+ if (lastbyte) {
+ /* Last byte is signified by dropping ATN */
+ ahc_outb(ahc, CLRSINT1, CLRATNO);
+ }
+
+ /*
+ * Clear our interrupt status and present
+ * the next byte on the bus.
+ */
+ ahc_outb(ahc, CLRSINT1, CLRREQINIT);
+ ahc_outb(ahc, SCSIDATL, ahc->msgout_buf[ahc->msgout_index++]);
+ break;
+ }
+ case MSG_TYPE_INITIATOR_MSGIN:
+ {
+ int phasemis;
+ int message_done;
+
+ phasemis = bus_phase != P_MESGIN;
+
+ if (phasemis) {
+ ahc->msgin_index = 0;
+ if (bus_phase == P_MESGOUT
+ && (ahc->send_msg_perror == TRUE
+ || (ahc->msgout_len != 0
+ && ahc->msgout_index == 0))) {
+ ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
+ goto reswitch;
+ }
+ end_session = TRUE;
+ break;
+ }
+
+ /* Pull the byte in without acking it */
+ ahc->msgin_buf[ahc->msgin_index] = ahc_inb(ahc, SCSIBUSL);
+
+ message_done = ahc_parse_msg(ahc, &devinfo);
+
+ if (message_done) {
+ /*
+ * Clear our incoming message buffer in case there
+ * is another message following this one.
+ */
+ ahc->msgin_index = 0;
+
+ /*
+ * If this message illicited a response,
+ * assert ATN so the target takes us to the
+ * message out phase.
+ */
+ if (ahc->msgout_len != 0)
+ ahc_outb(ahc, SCSISIGO,
+ ahc_inb(ahc, SCSISIGO) | ATNO);
+ } else
+ ahc->msgin_index++;
+
+ /* Ack the byte */
+ ahc_outb(ahc, CLRSINT1, CLRREQINIT);
+ ahc_inb(ahc, SCSIDATL);
+ break;
+ }
+ case MSG_TYPE_TARGET_MSGIN:
+ {
+ int msgdone;
+ int msgout_request;
+
+ if (ahc->msgout_len == 0)
+ panic("Target MSGIN with no active message");
+
+ /*
+ * If we interrupted a mesgout session, the initiator
+ * will not know this until our first REQ. So, we
+ * only honor mesgout requests after we've sent our
+ * first byte.
+ */
+ if ((ahc_inb(ahc, SCSISIGI) & ATNI) != 0
+ && ahc->msgout_index > 0)
+ msgout_request = TRUE;
+ else
+ msgout_request = FALSE;
+
+ if (msgout_request) {
+
+ /*
+ * Change gears and see if
+ * this messages is of interest to
+ * us or should be passed back to
+ * the sequencer.
+ */
+ ahc->msg_type = MSG_TYPE_TARGET_MSGOUT;
+ ahc_outb(ahc, SCSISIGO, P_MESGOUT | BSYO);
+ ahc->msgin_index = 0;
+ /* Dummy read to REQ for first byte */
+ ahc_inb(ahc, SCSIDATL);
+ ahc_outb(ahc, SXFRCTL0,
+ ahc_inb(ahc, SXFRCTL0) | SPIOEN);
+ break;
+ }
+
+ msgdone = ahc->msgout_index == ahc->msgout_len;
+ if (msgdone) {
+ ahc_outb(ahc, SXFRCTL0,
+ ahc_inb(ahc, SXFRCTL0) & ~SPIOEN);
+ end_session = TRUE;
+ break;
+ }
+
+ /*
+ * Present the next byte on the bus.
+ */
+ ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) | SPIOEN);
+ ahc_outb(ahc, SCSIDATL, ahc->msgout_buf[ahc->msgout_index++]);
+ break;
+ }
+ case MSG_TYPE_TARGET_MSGOUT:
+ {
+ int lastbyte;
+ int msgdone;
+
+ /*
+ * The initiator signals that this is
+ * the last byte by dropping ATN.
+ */
+ lastbyte = (ahc_inb(ahc, SCSISIGI) & ATNI) == 0;
+
+ /*
+ * Read the latched byte, but turn off SPIOEN first
+ * so that we don't inadvertantly cause a REQ for the
+ * next byte.
+ */
+ ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) & ~SPIOEN);
+ ahc->msgin_buf[ahc->msgin_index] = ahc_inb(ahc, SCSIDATL);
+ msgdone = ahc_parse_msg(ahc, &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_Q_TAG
+ && ahc->msgout_buf[index] <= MSG_IGN_WIDE_RESIDUE) {
+
+ /* Skip tag type and tag id or residue param*/
+ index += 2;
+ } else {
+ /* Single byte message */
+ 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 incomming 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 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) {
+ 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) {
+ 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,
+ ahc->msgin_buf[3], saved_width,
+ 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;
+ }
+ case MSG_BUS_DEV_RESET:
+ ahc_handle_devreset(ahc, devinfo,
+ CAM_BDR_SENT,
+ "Bus Device Reset Received",
+ /*verbose_level*/0);
+ restart_sequencer(ahc);
+ done = MSGLOOP_TERMINATED;
+ break;
+ case MSG_ABORT_TAG:
+ case MSG_ABORT:
+ case MSG_CLEAR_QUEUE:
+#ifdef AHC_TARGET_MODE
+ /* Target mode messages */
+ if (devinfo->role != ROLE_TARGET) {
+ reject = TRUE;
+ break;
+ }
+ ahc_abort_scbs(ahc, devinfo->target, devinfo->channel,
+ devinfo->lun,
+ ahc->msgin_buf[0] == MSG_ABORT_TAG
+ ? SCB_LIST_NULL
+ : ahc_inb(ahc, INITIATOR_TAG),
+ ROLE_TARGET, CAM_REQ_ABORTED);
+
+ tstate = ahc->enabled_targets[devinfo->our_scsiid];
+ if (tstate != NULL) {
+ struct tmode_lstate* lstate;
+
+ lstate = tstate->enabled_luns[devinfo->lun];
+ if (lstate != NULL) {
+ ahc_queue_lstate_event(ahc, lstate,
+ devinfo->our_scsiid,
+ ahc->msgin_buf[0],
+ /*arg*/0);
+ ahc_send_lstate_events(ahc, lstate);
+ }
+ }
+ done = MSGLOOP_MSGCOMPLETE;
+ 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 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->current.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_Q_TAG) != 0) {
+
+ 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, FALSE);
+
+ /*
+ * Resend the identify for this CCB as the target
+ * may believe that the selection is invalid otherwise.
+ */
+ ahc_outb(ahc, SCB_CONTROL,
+ ahc_inb(ahc, SCB_CONTROL) & ~MSG_SIMPLE_Q_TAG);
+ scb->hscb->control &= ~MSG_SIMPLE_Q_TAG;
+ ahc_set_transaction_tag(scb, /*enabled*/FALSE,
+ /*type*/MSG_SIMPLE_Q_TAG);
+ ahc_outb(ahc, MSG_OUT, MSG_IDENTIFYFLAG);
+ ahc_outb(ahc, SCSISIGO, ahc_inb(ahc, SCSISIGO) | ATNO);
+
+ /*
+ * 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;
+
+ /* 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+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--;
+ if (sg != scb->sg_list
+ && (sg->len & AHC_SG_LEN_MASK) < data_cnt) {
+
+ sg--;
+ data_cnt = 1 | (sg->len & AHC_DMA_LAST_SEG);
+ data_addr = sg->addr
+ + (sg->len & 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);
+ }
+
+/* XXX What about high address byte??? */
+ 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);
+
+/* XXX Perhaps better to just keep the saved address in sram */
+ if ((ahc->features & AHC_ULTRA2) != 0) {
+ ahc_outb(ahc, HADDR + 3, data_addr >> 24);
+ ahc_outb(ahc, HADDR + 2, data_addr >> 16);
+ ahc_outb(ahc, HADDR + 1, data_addr >> 8);
+ ahc_outb(ahc, HADDR, data_addr);
+ ahc_outb(ahc, DFCNTRL, PRELOADEN);
+ ahc_outb(ahc, SXFRCTL0,
+ ahc_inb(ahc, SXFRCTL0) | CLRCHN);
+ } else {
+ ahc_outb(ahc, HADDR + 3, data_addr >> 24);
+ ahc_outb(ahc, HADDR + 2, data_addr >> 16);
+ ahc_outb(ahc, HADDR + 1, data_addr >> 8);
+ ahc_outb(ahc, HADDR, data_addr);
+ }
+ }
+ }
+}
+
+/*
+ * 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 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 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);
+
+ 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
+void
+ahc_setup_target_msgin(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
+{
+ /*
+ * To facilitate adding multiple messages together,
+ * each routine should increment the index and len
+ * variables instead of setting them explicitly.
+ */
+ ahc->msgout_index = 0;
+ ahc->msgout_len = 0;
+
+ if ((ahc->targ_msg_req & devinfo->target_mask) != 0)
+ ahc_build_transfer_msg(ahc, devinfo);
+ else
+ panic("ahc_intr: AWAITING target message with no message");
+
+ ahc->msgout_index = 0;
+ ahc->msg_type = MSG_TYPE_TARGET_MSGIN;
+}
+#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;
+ 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, struct ahc_probe_config *config)
+{
+
+ ahc->chip = config->chip;
+ ahc->features = config->features;
+ ahc->bugs = config->bugs;
+ ahc->flags = config->flags;
+ ahc->channel = config->channel;
+ ahc->unpause = (ahc_inb(ahc, HCNTRL) & IRQMS) | INTEN;
+ ahc->description = config->description;
+ /* The IRQMS bit is only valid on VL and EISA chips */
+ if ((ahc->chip & AHC_PCI) != 0)
+ ahc->unpause &= ~IRQMS;
+ ahc->pause = ahc->unpause | PAUSE;
+ /* XXX The shared scb data stuff should be depricated */
+ 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;
+
+#ifdef AHC_SUPPORT_PCI
+ /*
+ * Second Function PCI devices need to inherit some
+ * settings from function 0. We assume that function 0
+ * will always be found prior to function 1.
+ */
+ if ((ahc->chip & AHC_BUS_MASK) == AHC_PCI
+ && ahc_get_pci_function(ahc->dev_softc) == 1) {
+ 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_bus(list_pci) == ahc_get_pci_bus(pci)
+ && ahc_get_pci_slot(list_pci) == ahc_get_pci_slot(pci)
+ && ahc_get_pci_function(list_pci) == 0) {
+ ahc->flags &= ~AHC_BIOS_ENABLED;
+ ahc->flags |=
+ list_ahc->flags & AHC_BIOS_ENABLED;
+ ahc->flags &= ~AHC_CHANNEL_B_PRIMARY;
+ ahc->flags |=
+ list_ahc->flags & AHC_CHANNEL_B_PRIMARY;
+ 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 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 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.
+ */
+ pause_sequencer(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);
+}
+
+void
+ahc_init_probe_config(struct ahc_probe_config *probe_config)
+{
+ probe_config->description = NULL;
+ probe_config->channel = 'A';
+ probe_config->channel_b = 'B';
+ probe_config->chip = AHC_NONE;
+ probe_config->features = AHC_FENONE;
+ probe_config->bugs = AHC_BUGNONE;
+ probe_config->flags = AHC_FNONE;
+}
+
+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,
+ M_DEVBUF, M_NOWAIT);
+ if (scb_data->scbarray == NULL)
+ return (ENOMEM);
+ memset(scb_data->scbarray, 0, sizeof(struct scb) * AHC_SCB_MAX);
+
+ /* 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*/0, /*lowaddr*/BUS_SPACE_MAXADDR,
+ /*highaddr*/BUS_SPACE_MAXADDR,
+ /*filter*/NULL, /*filterarg*/NULL,
+ AHC_SCB_MAX * 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 ccbs */
+ 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 * 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*/0, /*lowaddr*/BUS_SPACE_MAXADDR,
+ /*highaddr*/BUS_SPACE_MAXADDR,
+ /*filter*/NULL, /*filterarg*/NULL,
+ AHC_SCB_MAX * 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 * 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*/0, /*lowaddr*/BUS_SPACE_MAXADDR,
+ /*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 * 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)
+ /* 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)));
+ for (i = 0; scb_data->numscbs < AHC_SCB_MAX && 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_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_CHANNEL_B_PRIMARY ? 'B': 'A');
+ else {
+ const char *type;
+
+ if ((ahc->features & AHC_WIDE) != 0) {
+ type = "Wide";
+ } else {
+ type = "Single";
+ }
+ len = sprintf(buf, "%s Channel %c, SCSI Id=%d, ",
+ type, ahc->channel, ahc->our_id);
+ }
+ buf += len;
+
+ if ((ahc->flags & AHC_PAGESCBS) != 0)
+ sprintf(buf, "%d/%d SCBs",
+ ahc->scb_data->maxhscbs, AHC_SCB_MAX);
+ 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*/0, /*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*/0, /*lowaddr*/BUS_SPACE_MAXADDR,
+ /*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->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 tmode_tstate. "
+ "Failing attach\n", ahc_name(ahc));
+ return (-1);
+ }
+
+ if ((ahc->features & AHC_TWIN) != 0) {
+ if (ahc_alloc_tstate(ahc, ahc->our_id_b, 'B') == NULL) {
+ printf("%s: unable to allocate tmode_tstate. "
+ "Failing attach\n", ahc_name(ahc));
+ return (-1);
+ }
+ }
+
+ ahc_outb(ahc, SEQ_FLAGS, 0);
+ ahc_outb(ahc, SEQ_FLAGS2, 0);
+
+ if (ahc->scb_data->maxhscbs < AHC_SCB_MAX) {
+ 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->flags & AHC_ULTRA_DISABLED) != 0)
+ ultraenb = 0;
+
+ if ((ahc->features & (AHC_WIDE|AHC_TWIN)) == 0)
+ max_targ = 7;
+
+ for (i = 0; i <= max_targ; i++) {
+ struct ahc_initiator_tinfo *tinfo;
+ struct tmode_tstate *tstate;
+ u_int our_id;
+ u_int target_id;
+ char channel;
+
+ channel = 'A';
+ our_id = ahc->our_id;
+ target_id = i;
+ if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
+ channel = 'B';
+ our_id = ahc->our_id_b;
+ target_id = i % 8;
+ }
+ tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
+ target_id, &tstate);
+ /* Default to async narrow across the board */
+ 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->current.protocol_version = 2;
+ tinfo->current.transport_version = 2;
+ }
+ tstate->ultraenb = ultraenb;
+ tstate->discenable = discenable;
+ tstate->tagenable = 0; /* Wait until the XPT says its okay */
+ }
+ 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;
+
+ 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);
+
+ /* Don't have any special messages to send to targets */
+ ahc_outb(ahc, TARGET_MSG_REQUEST, 0);
+ ahc_outb(ahc, TARGET_MSG_REQUEST + 1, 0);
+
+ /*
+ * Use the built in queue management registers
+ * if they are available.
+ */
+ if ((ahc->features & AHC_QUEUE_REGS) != 0) {
+ ahc_outb(ahc, QOFF_CTLSTA, SCB_QSIZE_256);
+ ahc_outb(ahc, SDSCB_QOFF, 0);
+ ahc_outb(ahc, SNSCB_QOFF, 0);
+ ahc_outb(ahc, HNSCB_QOFF, 0);
+ }
+
+
+ /* We don't have any waiting selections */
+ ahc_outb(ahc, WAITING_SCBH, SCB_LIST_NULL);
+
+ /* Our disconnection list is empty too */
+ ahc_outb(ahc, DISCONNECTED_SCBH, SCB_LIST_NULL);
+
+ /* Message out buffer starts empty */
+ ahc_outb(ahc, MSG_OUT, MSG_NOOP);
+
+ /*
+ * Setup the allowed SCSI Sequences based on operational mode.
+ * If we are a target, we'll enalbe select in operations once
+ * we've had a lun enabled.
+ */
+ scsiseq_template = ENSELO|ENAUTOATNO|ENAUTOATNP;
+ if ((ahc->flags & AHC_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.
+ */
+ pause_sequencer(ahc);
+ for (wait = 5000;
+ (ahc_inb(ahc, SBLKCTL) & (ENAB40|ENAB20)) == 0 && wait;
+ wait--)
+ ahc_delay(100);
+ unpause_sequencer(ahc);
+ }
+ return (0);
+}
+
+/*
+ * 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);
+ pause_sequencer(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->qinfifo[ahc->qinfifonext++] = scb->hscb->tag;
+ scb->hscb->next = ahc->next_queued_scb->hscb->tag;
+}
+
+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 (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]);
+
+ /*
+ * 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 (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;
+ }
+
+ for (;i < maxtarget; i++) {
+ for (j = minlun;j < maxlun; j++)
+ 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.
+ */
+ 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
+ && 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 occured.
+ */
+ 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;
+ 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);
+ pause_sequencer(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';
+ if (cur_channel != channel) {
+ /* Case 1: Command for another bus is active
+ * Stealthily reset the other bus without
+ * upsetting the current bus.
+ */
+ ahc_outb(ahc, SBLKCTL, sblkctl ^ SELBUSB);
+ ahc_outb(ahc, SIMODE1,
+ ahc_inb(ahc, SIMODE1) & ~(ENBUSFREE|ENSCSIRST));
+ ahc_outb(ahc, SCSISEQ,
+ ahc_inb(ahc, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP));
+ if (initiate_reset)
+ ahc_reset_current_bus(ahc);
+ ahc_clear_intstat(ahc);
+ ahc_outb(ahc, SBLKCTL, sblkctl);
+ restart_needed = FALSE;
+ } else {
+ /* Case 2: A command from this bus is active or we're idle */
+ ahc_clear_msg_state(ahc);
+ ahc_outb(ahc, SIMODE1,
+ ahc_inb(ahc, SIMODE1) & ~(ENBUSFREE|ENSCSIRST));
+ ahc_outb(ahc, SCSISEQ,
+ ahc_inb(ahc, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP));
+ if (initiate_reset)
+ ahc_reset_current_bus(ahc);
+ ahc_clear_intstat(ahc);
+ 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 tmode_tstate* tstate;
+ u_int lun;
+
+ tstate = ahc->enabled_targets[target];
+ if (tstate == NULL)
+ continue;
+ for (lun = 0; lun < AHC_NUM_LUNS; lun++) {
+ struct 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);
+
+ /*
+ * 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)
+ restart_sequencer(ahc);
+ else
+ unpause_sequencer(ahc);
+ return found;
+}
+
+
+/***************************** Residual Processing ****************************/
+/*
+ * Calculate the residual for a just completed SCB.
+ */
+static 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) {
+ 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 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 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);
+ restart_sequencer(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 qinpos;
+ uint8_t qintail;
+ uint8_t qoutpos;
+ uint8_t scb_index;
+ uint8_t saved_scbptr;
+
+ saved_scbptr = ahc_inb(ahc, SCBPTR);
+
+ printf("%s: Dumping Card State at SEQADDR 0x%x\n",
+ ahc_name(ahc),
+ ahc_inb(ahc, SEQADDR0) | (ahc_inb(ahc, SEQADDR1) << 8));
+
+ printf("SCSISEQ = 0x%x, SBLKCTL = 0x%x, SSTAT0 0x%x\n",
+ ahc_inb(ahc, SCSISEQ), ahc_inb(ahc, SBLKCTL),
+ ahc_inb(ahc, SSTAT0));
+ 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");
+
+ 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;
+ printf("%d ", scb->hscb->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 tmode_tstate **tstate, struct 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 tmode_tstate *tstate;
+ struct 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;
+ pause_sequencer(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);
+ pause_sequencer(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);
+ }
+ unpause_sequencer(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);
+
+ pause_sequencer(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;
+ pause_sequencer(ahc);
+ ahc_loadseq(ahc);
+ }
+ }
+ unpause_sequencer(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;
+
+ 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;
+
+ ahc->tqinfifonext++;
+ cmd->cmd_valid = 0;
+
+ /*
+ * Lazily update our position in the target mode incomming
+ * 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)
+ pause_sequencer(ahc);
+ ahc_outb(ahc, KERNEL_TQINPOS,
+ ahc->tqinfifonext & HOST_TQINPOS);
+ if (!paused)
+ unpause_sequencer(ahc);
+ }
+ }
+ }
+}
+
+static int
+ahc_handle_target_cmd(struct ahc_softc *ahc, struct target_cmd *cmd)
+{
+ struct tmode_tstate *tstate;
+ struct 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)