Remove __static inline to make the kernel ~24k smaller on i386 and make the debug sessions bearable.

ok krw@ deraadt@

1 files changed, 826 insertions, 5 deletions

diff --git a/sys/dev/ic/aic79xx.c b/sys/dev/ic/aic79xx.c
index fce5f2ac613..b0d1d3f6721 100644
--- a/sys/dev/ic/aic79xx.c
+++ b/sys/dev/ic/aic79xx.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: aic79xx.c,v 1.5 2004/06/23 03:23:19 marco Exp $	*/
+/*	$OpenBSD: aic79xx.c,v 1.6 2004/08/06 01:29:19 marco Exp $	*/
 /*
  * Core routines and tables shareable across OS platforms.
  *
@@ -49,6 +49,7 @@
 
 #include <dev/ic/aic79xx_openbsd.h>
 #include <dev/ic/aic79xx_inline.h>
+#include <dev/ic/aic79xx.h>
 
 #include <dev/microcode/aic7xxx/aicasm.h>
 #include <dev/microcode/aic7xxx/aicasm_insformat.h>
@@ -265,8 +266,8 @@ void ahd_freedmamem(bus_dma_tag_t tag,
 
 /******************************** Private Inlines *****************************/
 __inline void	ahd_assert_atn(struct ahd_softc *ahd);
-__inline int	ahd_currently_packetized(struct ahd_softc *ahd);
-__inline int	ahd_set_active_fifo(struct ahd_softc *ahd);
+int	ahd_currently_packetized(struct ahd_softc *ahd);
+int	ahd_set_active_fifo(struct ahd_softc *ahd);
 
 __inline void
 ahd_assert_atn(struct ahd_softc *ahd)
@@ -280,7 +281,7 @@ ahd_assert_atn(struct ahd_softc *ahd)
  * are currently in a packetized transfer.  We could
  * just as easily be sending or receiving a message.
  */
-__inline int
+int
 ahd_currently_packetized(struct ahd_softc *ahd)
 {
 	ahd_mode_state	 saved_modes;
@@ -303,7 +304,7 @@ ahd_currently_packetized(struct ahd_softc *ahd)
 	return (packetized);
 }
 
-__inline int
+int
 ahd_set_active_fifo(struct ahd_softc *ahd)
 {
 	u_int active_fifo;
@@ -10195,3 +10196,823 @@ ahd_freedmamem(tag, size, map, vaddr, seg, nseg)
 	bus_dmamem_free(tag, seg, nseg);
 }
 
+char *
+ahd_name(struct ahd_softc *ahd)
+{
+	return (ahd->name);
+}
+
+void
+ahd_known_modes(struct ahd_softc *ahd, ahd_mode src, ahd_mode dst)
+{
+	ahd->src_mode = src;
+	ahd->dst_mode = dst;
+	ahd->saved_src_mode = src;
+	ahd->saved_dst_mode = dst;
+}
+
+ahd_mode_state
+ahd_build_mode_state(struct ahd_softc *ahd, ahd_mode src, ahd_mode dst)
+{
+	return ((src << SRC_MODE_SHIFT) | (dst << DST_MODE_SHIFT));
+}
+
+void
+ahd_extract_mode_state(struct ahd_softc *ahd, ahd_mode_state state,
+		       ahd_mode *src, ahd_mode *dst)
+{
+	*src = (state & SRC_MODE) >> SRC_MODE_SHIFT;
+	*dst = (state & DST_MODE) >> DST_MODE_SHIFT;
+}
+
+void
+ahd_set_modes(struct ahd_softc *ahd, ahd_mode src, ahd_mode dst)
+{
+	if (ahd->src_mode == src && ahd->dst_mode == dst)
+		return;
+#ifdef AHD_DEBUG
+	if (ahd->src_mode == AHD_MODE_UNKNOWN
+	 || ahd->dst_mode == AHD_MODE_UNKNOWN)
+		panic("Setting mode prior to saving it.\n");
+	if ((ahd_debug & AHD_SHOW_MODEPTR) != 0)
+		printf("%s: Setting mode 0x%x\n", ahd_name(ahd),
+		       ahd_build_mode_state(ahd, src, dst));
+#endif
+	ahd_outb(ahd, MODE_PTR, ahd_build_mode_state(ahd, src, dst));
+	ahd->src_mode = src;
+	ahd->dst_mode = dst;
+}
+
+void
+ahd_update_modes(struct ahd_softc *ahd)
+{
+	ahd_mode_state mode_ptr;
+	ahd_mode src;
+	ahd_mode dst;
+
+	mode_ptr = ahd_inb(ahd, MODE_PTR);
+#ifdef AHD_DEBUG
+	if ((ahd_debug & AHD_SHOW_MODEPTR) != 0)
+		printf("Reading mode 0x%x\n", mode_ptr);
+#endif
+	ahd_extract_mode_state(ahd, mode_ptr, &src, &dst);
+	ahd_known_modes(ahd, src, dst);
+}
+
+void
+ahd_assert_modes(struct ahd_softc *ahd, ahd_mode srcmode,
+		 ahd_mode dstmode, const char *file, int line)
+{
+#ifdef AHD_DEBUG
+	if ((srcmode & AHD_MK_MSK(ahd->src_mode)) == 0
+	 || (dstmode & AHD_MK_MSK(ahd->dst_mode)) == 0) {
+		panic("%s:%s:%d: Mode assertion failed.\n",
+		       ahd_name(ahd), file, line);
+	}
+#endif
+}
+
+ahd_mode_state
+ahd_save_modes(struct ahd_softc *ahd)
+{
+	if (ahd->src_mode == AHD_MODE_UNKNOWN
+	 || ahd->dst_mode == AHD_MODE_UNKNOWN)
+		ahd_update_modes(ahd);
+
+	return (ahd_build_mode_state(ahd, ahd->src_mode, ahd->dst_mode));
+}
+
+void
+ahd_restore_modes(struct ahd_softc *ahd, ahd_mode_state state)
+{
+	ahd_mode src;
+	ahd_mode dst;
+
+	ahd_extract_mode_state(ahd, state, &src, &dst);
+	ahd_set_modes(ahd, src, dst);
+}
+
+/*
+ * Determine whether the sequencer has halted code execution.
+ * Returns non-zero status if the sequencer is stopped.
+ */
+int
+ahd_is_paused(struct ahd_softc *ahd)
+{
+	return ((ahd_inb(ahd, HCNTRL) & PAUSE) != 0);
+}
+
+/*
+ * Request that the sequencer stop and wait, indefinitely, for it
+ * to stop.  The sequencer will only acknowledge that it is paused
+ * once it has reached an instruction boundary and PAUSEDIS is
+ * cleared in the SEQCTL register.  The sequencer may use PAUSEDIS
+ * for critical sections.
+ */
+void
+ahd_pause(struct ahd_softc *ahd)
+{
+	ahd_outb(ahd, HCNTRL, ahd->pause);
+
+	/*
+	 * Since the sequencer can disable pausing in a critical section, we
+	 * must loop until it actually stops.
+	 */
+	while (ahd_is_paused(ahd) == 0)
+		;
+}
+
+/*
+ * Allow the sequencer to continue program execution.
+ * We check here to ensure that no additional interrupt
+ * sources that would cause the sequencer to halt have been
+ * asserted.  If, for example, a SCSI bus reset is detected
+ * while we are fielding a different, pausing, interrupt type,
+ * we don't want to release the sequencer before going back
+ * into our interrupt handler and dealing with this new
+ * condition.
+ */
+void
+ahd_unpause(struct ahd_softc *ahd)
+{
+	/*
+	 * Automatically restore our modes to those saved
+	 * prior to the first change of the mode.
+	 */
+	if (ahd->saved_src_mode != AHD_MODE_UNKNOWN
+	 && ahd->saved_dst_mode != AHD_MODE_UNKNOWN) {
+		if ((ahd->flags & AHD_UPDATE_PEND_CMDS) != 0)
+			ahd_reset_cmds_pending(ahd);
+		ahd_set_modes(ahd, ahd->saved_src_mode, ahd->saved_dst_mode);
+	}
+
+	if ((ahd_inb(ahd, INTSTAT) & ~CMDCMPLT) == 0)
+		ahd_outb(ahd, HCNTRL, ahd->unpause);
+
+	ahd_known_modes(ahd, AHD_MODE_UNKNOWN, AHD_MODE_UNKNOWN);
+}
+
+void *
+ahd_sg_setup(struct ahd_softc *ahd, struct scb *scb,
+	     void *sgptr, bus_addr_t addr, bus_size_t len, int last)
+{
+	scb->sg_count++;
+	if (sizeof(bus_addr_t) > 4
+	 && (ahd->flags & AHD_64BIT_ADDRESSING) != 0) {
+		struct ahd_dma64_seg *sg;
+
+		sg = (struct ahd_dma64_seg *)sgptr;
+		sg->addr = ahd_htole64(addr);
+		sg->len = ahd_htole32(len | (last ? AHD_DMA_LAST_SEG : 0));
+		return (sg + 1);
+	} else {
+		struct ahd_dma_seg *sg;
+
+		sg = (struct ahd_dma_seg *)sgptr;
+		sg->addr = ahd_htole32(addr & 0xFFFFFFFF);
+		sg->len = ahd_htole32(len | ((addr >> 8) & 0x7F000000)
+				    | (last ? AHD_DMA_LAST_SEG : 0));
+		return (sg + 1);
+	}
+}
+
+void
+ahd_setup_scb_common(struct ahd_softc *ahd, struct scb *scb)
+{
+	/* XXX Handle target mode SCBs. */
+	scb->crc_retry_count = 0;
+	if ((scb->flags & SCB_PACKETIZED) != 0) {
+		/* XXX what about ACA??  It is type 4, but TAG_TYPE == 0x3. */
+		scb->hscb->task_attribute = scb->hscb->control & SCB_TAG_TYPE;
+	} else {
+		if (ahd_get_transfer_length(scb) & 0x01)
+			scb->hscb->task_attribute = SCB_XFERLEN_ODD;
+		else
+			scb->hscb->task_attribute = 0;
+	}
+
+	if (scb->hscb->cdb_len <= MAX_CDB_LEN_WITH_SENSE_ADDR
+	 || (scb->hscb->cdb_len & SCB_CDB_LEN_PTR) != 0)
+		scb->hscb->shared_data.idata.cdb_plus_saddr.sense_addr =
+		    ahd_htole32(scb->sense_busaddr);
+}
+
+void
+ahd_setup_data_scb(struct ahd_softc *ahd, struct scb *scb)
+{
+	/*
+	 * Copy the first SG into the "current" data ponter area.
+	 */
+	if ((ahd->flags & AHD_64BIT_ADDRESSING) != 0) {
+		struct ahd_dma64_seg *sg;
+
+		sg = (struct ahd_dma64_seg *)scb->sg_list;
+		scb->hscb->dataptr = sg->addr;
+		scb->hscb->datacnt = sg->len;
+	} else {
+		struct ahd_dma_seg *sg;
+		uint32_t *dataptr_words;
+
+		sg = (struct ahd_dma_seg *)scb->sg_list;
+		dataptr_words = (uint32_t*)&scb->hscb->dataptr;
+		dataptr_words[0] = sg->addr;
+		dataptr_words[1] = 0;
+		if ((ahd->flags & AHD_39BIT_ADDRESSING) != 0) {
+			uint64_t high_addr;
+
+			high_addr = ahd_le32toh(sg->len) & 0x7F000000;
+			scb->hscb->dataptr |= ahd_htole64(high_addr << 8);
+		}
+		scb->hscb->datacnt = sg->len;
+	}
+	/*
+	 * Note where to find the SG entries in bus space.
+	 * We also set the full residual flag which the 
+	 * sequencer will clear as soon as a data transfer
+	 * occurs.
+	 */
+	scb->hscb->sgptr = ahd_htole32(scb->sg_list_busaddr|SG_FULL_RESID);
+}
+
+void
+ahd_setup_noxfer_scb(struct ahd_softc *ahd, struct scb *scb)
+{
+	scb->hscb->sgptr = ahd_htole32(SG_LIST_NULL);
+	scb->hscb->dataptr = 0;
+	scb->hscb->datacnt = 0;
+}
+
+size_t
+ahd_sg_size(struct ahd_softc *ahd)
+{
+	if ((ahd->flags & AHD_64BIT_ADDRESSING) != 0)
+		return (sizeof(struct ahd_dma64_seg));
+	return (sizeof(struct ahd_dma_seg));
+}
+
+void *
+ahd_sg_bus_to_virt(struct ahd_softc *ahd, struct scb *scb, uint32_t sg_busaddr)
+{
+	bus_addr_t sg_offset;
+
+	/* sg_list_phys points to entry 1, not 0 */
+	sg_offset = sg_busaddr - (scb->sg_list_busaddr - ahd_sg_size(ahd));
+	return ((uint8_t *)scb->sg_list + sg_offset);
+}
+
+uint32_t
+ahd_sg_virt_to_bus(struct ahd_softc *ahd, struct scb *scb, void *sg)
+{
+	bus_addr_t sg_offset;
+
+	/* sg_list_phys points to entry 1, not 0 */
+	sg_offset = ((uint8_t *)sg - (uint8_t *)scb->sg_list)
+		  - ahd_sg_size(ahd);
+
+	return (scb->sg_list_busaddr + sg_offset);
+}
+
+void
+ahd_sync_scb(struct ahd_softc *ahd, struct scb *scb, int op)
+{
+	ahd_dmamap_sync(ahd, ahd->parent_dmat, scb->hscb_map->dmamap,
+			/*offset*/(uint8_t*)scb->hscb - scb->hscb_map->vaddr,
+			/*len*/sizeof(*scb->hscb), op);
+}
+
+void
+ahd_sync_sglist(struct ahd_softc *ahd, struct scb *scb, int op)
+{
+	if (scb->sg_count == 0)
+		return;
+
+	ahd_dmamap_sync(ahd, ahd->parent_dmat,
+			scb->sense_map->dmamap,
+			/*offset*/scb->sg_list_busaddr - ahd_sg_size(ahd),
+			/*len*/ahd_sg_size(ahd) * scb->sg_count, op);
+}
+
+void
+ahd_sync_sense(struct ahd_softc *ahd, struct scb *scb, int op)
+{
+	ahd_dmamap_sync(ahd, ahd->parent_dmat,
+			scb->sense_map->dmamap,
+			/*offset*/scb->sense_busaddr,
+			/*len*/AHD_SENSE_BUFSIZE, op);
+}
+
+uint32_t
+ahd_targetcmd_offset(struct ahd_softc *ahd, u_int index)
+{
+	return (((uint8_t *)&ahd->targetcmds[index])
+	       - (uint8_t *)ahd->qoutfifo);
+}
+
+void
+ahd_complete_scb(struct ahd_softc *ahd, struct scb *scb)
+{
+	uint32_t sgptr;
+
+	sgptr = ahd_le32toh(scb->hscb->sgptr);
+	if ((sgptr & SG_STATUS_VALID) != 0)
+		ahd_handle_scb_status(ahd, scb);
+	else
+		ahd_done(ahd, scb);
+}
+
+/*
+ * Determine whether the sequencer reported a residual
+ * for this SCB/transaction.
+ */
+void
+ahd_update_residual(struct ahd_softc *ahd, struct scb *scb)
+{
+	uint32_t sgptr;
+
+	sgptr = ahd_le32toh(scb->hscb->sgptr);
+	if ((sgptr & SG_STATUS_VALID) != 0)
+		ahd_calc_residual(ahd, scb);
+}
+
+/*
+ * Return pointers to the transfer negotiation information
+ * for the specified our_id/remote_id pair.
+ */
+struct ahd_initiator_tinfo *
+ahd_fetch_transinfo(struct ahd_softc *ahd, char channel, u_int our_id,
+		    u_int remote_id, struct ahd_tmode_tstate **tstate)
+{
+	/*
+	 * Transfer data structures are stored from the perspective
+	 * of the target role.  Since the parameters for a connection
+	 * in the initiator role to a given target are the same as
+	 * when the roles are reversed, we pretend we are the target.
+	 */
+	if (channel == 'B')
+		our_id += 8;
+	*tstate = ahd->enabled_targets[our_id];
+	return (&(*tstate)->transinfo[remote_id]);
+}
+
+#define AHD_COPY_COL_IDX(dst, src)				\
+do {								\
+	dst->hscb->scsiid = src->hscb->scsiid;			\
+	dst->hscb->lun = src->hscb->lun;			\
+} while (0)
+
+uint16_t
+ahd_inw(struct ahd_softc *ahd, u_int port)
+{
+	/*
+	 * Read high byte first as some registers increment
+	 * or have other side effects when the low byte is
+	 * read.
+	 */
+	return ((ahd_inb(ahd, port+1) << 8) | ahd_inb(ahd, port));
+}
+
+void
+ahd_outw(struct ahd_softc *ahd, u_int port, u_int value)
+{
+	/*
+	 * Write low byte first to accomodate registers
+	 * such as PRGMCNT where the order maters.
+	 */
+	ahd_outb(ahd, port, value & 0xFF);
+	ahd_outb(ahd, port+1, (value >> 8) & 0xFF);
+}
+
+uint32_t
+ahd_inl(struct ahd_softc *ahd, u_int port)
+{
+	return ((ahd_inb(ahd, port))
+	      | (ahd_inb(ahd, port+1) << 8)
+	      | (ahd_inb(ahd, port+2) << 16)
+	      | (ahd_inb(ahd, port+3) << 24));
+}
+
+void
+ahd_outl(struct ahd_softc *ahd, u_int port, uint32_t value)
+{
+	ahd_outb(ahd, port, (value) & 0xFF);
+	ahd_outb(ahd, port+1, ((value) >> 8) & 0xFF);
+	ahd_outb(ahd, port+2, ((value) >> 16) & 0xFF);
+	ahd_outb(ahd, port+3, ((value) >> 24) & 0xFF);
+}
+
+uint64_t
+ahd_inq(struct ahd_softc *ahd, u_int port)
+{
+	return ((ahd_inb(ahd, port))
+	      | (ahd_inb(ahd, port+1) << 8)
+	      | (ahd_inb(ahd, port+2) << 16)
+	      | (ahd_inb(ahd, port+3) << 24)
+	      | (((uint64_t)ahd_inb(ahd, port+4)) << 32)
+	      | (((uint64_t)ahd_inb(ahd, port+5)) << 40)
+	      | (((uint64_t)ahd_inb(ahd, port+6)) << 48)
+	      | (((uint64_t)ahd_inb(ahd, port+7)) << 56));
+}
+
+void
+ahd_outq(struct ahd_softc *ahd, u_int port, uint64_t value)
+{
+	ahd_outb(ahd, port, value & 0xFF);
+	ahd_outb(ahd, port+1, (value >> 8) & 0xFF);
+	ahd_outb(ahd, port+2, (value >> 16) & 0xFF);
+	ahd_outb(ahd, port+3, (value >> 24) & 0xFF);
+	ahd_outb(ahd, port+4, (value >> 32) & 0xFF);
+	ahd_outb(ahd, port+5, (value >> 40) & 0xFF);
+	ahd_outb(ahd, port+6, (value >> 48) & 0xFF);
+	ahd_outb(ahd, port+7, (value >> 56) & 0xFF);
+}
+
+u_int
+ahd_get_scbptr(struct ahd_softc *ahd)
+{
+	AHD_ASSERT_MODES(ahd, ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK),
+			 ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK));
+	return (ahd_inb(ahd, SCBPTR) | (ahd_inb(ahd, SCBPTR + 1) << 8));
+}
+
+void
+ahd_set_scbptr(struct ahd_softc *ahd, u_int scbptr)
+{
+	AHD_ASSERT_MODES(ahd, ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK),
+			 ~(AHD_MODE_UNKNOWN_MSK|AHD_MODE_CFG_MSK));
+	ahd_outb(ahd, SCBPTR, scbptr & 0xFF);
+	ahd_outb(ahd, SCBPTR+1, (scbptr >> 8) & 0xFF);
+}
+
+u_int
+ahd_get_hnscb_qoff(struct ahd_softc *ahd)
+{
+	return (ahd_inw_atomic(ahd, HNSCB_QOFF));
+}
+
+void
+ahd_set_hnscb_qoff(struct ahd_softc *ahd, u_int value)
+{
+	ahd_outw_atomic(ahd, HNSCB_QOFF, value);
+}
+
+u_int
+ahd_get_hescb_qoff(struct ahd_softc *ahd)
+{
+	return (ahd_inb(ahd, HESCB_QOFF));
+}
+
+void
+ahd_set_hescb_qoff(struct ahd_softc *ahd, u_int value)
+{
+	ahd_outb(ahd, HESCB_QOFF, value);
+}
+
+u_int
+ahd_get_snscb_qoff(struct ahd_softc *ahd)
+{
+	u_int oldvalue;
+
+	AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK);
+	oldvalue = ahd_inw(ahd, SNSCB_QOFF);
+	ahd_outw(ahd, SNSCB_QOFF, oldvalue);
+	return (oldvalue);
+}
+
+void
+ahd_set_snscb_qoff(struct ahd_softc *ahd, u_int value)
+{
+	AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK);
+	ahd_outw(ahd, SNSCB_QOFF, value);
+}
+
+u_int
+ahd_get_sescb_qoff(struct ahd_softc *ahd)
+{
+	AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK);
+	return (ahd_inb(ahd, SESCB_QOFF));
+}
+
+void
+ahd_set_sescb_qoff(struct ahd_softc *ahd, u_int value)
+{
+	AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK);
+	ahd_outb(ahd, SESCB_QOFF, value);
+}
+
+u_int
+ahd_get_sdscb_qoff(struct ahd_softc *ahd)
+{
+	AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK);
+	return (ahd_inb(ahd, SDSCB_QOFF) | (ahd_inb(ahd, SDSCB_QOFF + 1) << 8));
+}
+
+void
+ahd_set_sdscb_qoff(struct ahd_softc *ahd, u_int value)
+{
+	AHD_ASSERT_MODES(ahd, AHD_MODE_CCHAN_MSK, AHD_MODE_CCHAN_MSK);
+	ahd_outb(ahd, SDSCB_QOFF, value & 0xFF);
+	ahd_outb(ahd, SDSCB_QOFF+1, (value >> 8) & 0xFF);
+}
+
+u_int
+ahd_inb_scbram(struct ahd_softc *ahd, u_int offset)
+{
+	u_int value;
+
+	/*
+	 * Workaround PCI-X Rev A. hardware bug.
+	 * After a host read of SCB memory, the chip
+	 * may become confused into thinking prefetch
+	 * was required.  This starts the discard timer
+	 * running and can cause an unexpected discard
+	 * timer interrupt.  The work around is to read
+	 * a normal register prior to the exhaustion of
+	 * the discard timer.  The mode pointer register
+	 * has no side effects and so serves well for
+	 * this purpose.
+	 *
+	 * Razor #528
+	 */
+	value = ahd_inb(ahd, offset);
+	if ((ahd->bugs & AHD_PCIX_SCBRAM_RD_BUG) != 0)
+		ahd_inb(ahd, MODE_PTR);
+	return (value);
+}
+
+u_int
+ahd_inw_scbram(struct ahd_softc *ahd, u_int offset)
+{
+	return (ahd_inb_scbram(ahd, offset)
+	      | (ahd_inb_scbram(ahd, offset+1) << 8));
+}
+
+uint32_t
+ahd_inl_scbram(struct ahd_softc *ahd, u_int offset)
+{
+	return (ahd_inw_scbram(ahd, offset)
+	      | (ahd_inw_scbram(ahd, offset+2) << 16));
+}
+
+uint64_t
+ahd_inq_scbram(struct ahd_softc *ahd, u_int offset)
+{
+	return (ahd_inl_scbram(ahd, offset)
+	      | ((uint64_t)ahd_inl_scbram(ahd, offset+4)) << 32);
+}
+
+struct scb *
+ahd_lookup_scb(struct ahd_softc *ahd, u_int tag)
+{
+	struct scb* scb;
+
+	if (tag >= AHD_SCB_MAX)
+		return (NULL);
+	scb = ahd->scb_data.scbindex[tag];
+	if (scb != NULL)
+		ahd_sync_scb(ahd, scb,
+			     BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
+	return (scb);
+}
+
+void
+ahd_swap_with_next_hscb(struct ahd_softc *ahd, struct scb *scb)
+{
+	struct	 hardware_scb *q_hscb;
+	struct	 map_node *q_hscb_map;
+	uint32_t saved_hscb_busaddr;
+
+	/*
+	 * Our queuing method is a bit tricky.  The card
+	 * knows in advance which HSCB (by address) to download,
+	 * and we can't disappoint it.  To achieve this, the next
+	 * HSCB to download is saved off in ahd->next_queued_hscb.
+	 * When we are called to queue "an arbitrary scb",
+	 * we copy the contents of the incoming HSCB to the one
+	 * the sequencer knows about, swap HSCB pointers and
+	 * finally assign the SCB to the tag indexed location
+	 * in the scb_array.  This makes sure that we can still
+	 * locate the correct SCB by SCB_TAG.
+	 */
+	q_hscb = ahd->next_queued_hscb;
+	q_hscb_map = ahd->next_queued_hscb_map;
+	saved_hscb_busaddr = q_hscb->hscb_busaddr;
+	memcpy(q_hscb, scb->hscb, sizeof(*scb->hscb));
+	q_hscb->hscb_busaddr = saved_hscb_busaddr;
+	q_hscb->next_hscb_busaddr = scb->hscb->hscb_busaddr;
+
+	/* Now swap HSCB pointers. */
+	ahd->next_queued_hscb = scb->hscb;
+	ahd->next_queued_hscb_map = scb->hscb_map;
+	scb->hscb = q_hscb;
+	scb->hscb_map = q_hscb_map;
+
+	/* Now define the mapping from tag to SCB in the scbindex */
+	ahd->scb_data.scbindex[SCB_GET_TAG(scb)] = scb;
+}
+
+/*
+ * Tell the sequencer about a new transaction to execute.
+ */
+void
+ahd_queue_scb(struct ahd_softc *ahd, struct scb *scb)
+{
+	ahd_swap_with_next_hscb(ahd, scb);
+
+	if (SCBID_IS_NULL(SCB_GET_TAG(scb)))
+		panic("Attempt to queue invalid SCB tag %x\n",
+		      SCB_GET_TAG(scb));
+
+	/*
+	 * Keep a history of SCBs we've downloaded in the qinfifo.
+	 */
+	ahd->qinfifo[AHD_QIN_WRAP(ahd->qinfifonext)] = SCB_GET_TAG(scb);
+	ahd->qinfifonext++;
+
+	if (scb->sg_count != 0)
+		ahd_setup_data_scb(ahd, scb);
+	else
+		ahd_setup_noxfer_scb(ahd, scb);
+	ahd_setup_scb_common(ahd, scb);
+
+	/*
+	 * Make sure our data is consistent from the
+	 * perspective of the adapter.
+	 */
+	ahd_sync_scb(ahd, scb, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
+
+#ifdef AHD_DEBUG
+	if ((ahd_debug & AHD_SHOW_QUEUE) != 0) {
+		uint64_t host_dataptr;
+
+		host_dataptr = ahd_le64toh(scb->hscb->dataptr);
+		printf("%s: Queueing SCB 0x%x bus addr 0x%x - 0x%x%x/0x%x\n",
+		       ahd_name(ahd),
+		       SCB_GET_TAG(scb), ahd_le32toh(scb->hscb->hscb_busaddr),
+		       (u_int)((host_dataptr >> 32) & 0xFFFFFFFF),
+		       (u_int)(host_dataptr & 0xFFFFFFFF),
+		       ahd_le32toh(scb->hscb->datacnt));
+	}
+#endif
+	/* Tell the adapter about the newly queued SCB */
+	ahd_set_hnscb_qoff(ahd, ahd->qinfifonext);
+}
+
+uint8_t *
+ahd_get_sense_buf(struct ahd_softc *ahd, struct scb *scb)
+{
+	return (scb->sense_data);
+}
+
+uint32_t
+ahd_get_sense_bufaddr(struct ahd_softc *ahd, struct scb *scb)
+{
+	return (scb->sense_busaddr);
+}
+
+void
+ahd_sync_qoutfifo(struct ahd_softc *ahd, int op)
+{
+	ahd_dmamap_sync(ahd, ahd->parent_dmat, ahd->shared_data_map.dmamap,
+			/*offset*/0,
+			/*len*/AHD_SCB_MAX * sizeof(struct ahd_completion), op);
+}
+
+void
+ahd_sync_tqinfifo(struct ahd_softc *ahd, int op)
+{
+#ifdef AHD_TARGET_MODE
+	if ((ahd->flags & AHD_TARGETROLE) != 0) {
+		ahd_dmamap_sync(ahd, ahd->parent_dmat,
+				ahd->shared_data_map.dmamap,
+				ahd_targetcmd_offset(ahd, 0),
+				sizeof(struct target_cmd) * AHD_TMODE_CMDS,
+				op);
+	}
+#endif
+}
+
+/*
+ * See if the firmware has posted any completed commands
+ * into our in-core command complete fifos.
+ */
+#define AHD_RUN_QOUTFIFO 0x1
+#define AHD_RUN_TQINFIFO 0x2
+u_int
+ahd_check_cmdcmpltqueues(struct ahd_softc *ahd)
+{
+	u_int retval;
+
+	retval = 0;
+	ahd_dmamap_sync(ahd, ahd->parent_dmat, ahd->shared_data_map.dmamap,
+			/*offset*/ahd->qoutfifonext * sizeof(*ahd->qoutfifo),
+			/*len*/sizeof(*ahd->qoutfifo), BUS_DMASYNC_POSTREAD);
+	if (ahd->qoutfifo[ahd->qoutfifonext].valid_tag
+	  == ahd->qoutfifonext_valid_tag)
+		retval |= AHD_RUN_QOUTFIFO;
+#ifdef AHD_TARGET_MODE
+	if ((ahd->flags & AHD_TARGETROLE) != 0
+	 && (ahd->flags & AHD_TQINFIFO_BLOCKED) == 0) {
+		ahd_dmamap_sync(ahd, ahd->parent_dmat
+				ahd->shared_data_map.dmamap,
+				ahd_targetcmd_offset(ahd, ahd->tqinfifofnext),
+				/*len*/sizeof(struct target_cmd),
+				BUS_DMASYNC_POSTREAD);
+		if (ahd->targetcmds[ahd->tqinfifonext].cmd_valid != 0)
+			retval |= AHD_RUN_TQINFIFO;
+	}
+#endif
+	return (retval);
+}
+
+/*
+ * Catch an interrupt from the adapter
+ */
+int
+ahd_intr(struct ahd_softc *ahd)
+{
+	u_int	intstat;
+
+	if ((ahd->pause & INTEN) == 0) {
+		/*
+		 * Our interrupt is not enabled on the chip
+		 * and may be disabled for re-entrancy reasons,
+		 * so just return.  This is likely just a shared
+		 * interrupt.
+		 */
+		return (0);
+	}
+
+	/*
+	 * Instead of directly reading the interrupt status register,
+	 * infer the cause of the interrupt by checking our in-core
+	 * completion queues.  This avoids a costly PCI bus read in
+	 * most cases.
+	 */
+	if ((ahd->flags & AHD_ALL_INTERRUPTS) == 0
+	 && (ahd_check_cmdcmpltqueues(ahd) != 0))
+		intstat = CMDCMPLT;
+	else
+		intstat = ahd_inb(ahd, INTSTAT);
+
+	if ((intstat & INT_PEND) == 0)
+		return (0);
+
+	if (intstat & CMDCMPLT) {
+		ahd_outb(ahd, CLRINT, CLRCMDINT);
+
+		/*
+		 * Ensure that the chip sees that we've cleared
+		 * this interrupt before we walk the output fifo.
+		 * Otherwise, we may, due to posted bus writes,
+		 * clear the interrupt after we finish the scan,
+		 * and after the sequencer has added new entries
+		 * and asserted the interrupt again.
+		 */
+		if ((ahd->bugs & AHD_INTCOLLISION_BUG) != 0) {
+			if (ahd_is_paused(ahd)) {
+				/*
+				 * Potentially lost SEQINT.
+				 * If SEQINTCODE is non-zero,
+				 * simulate the SEQINT.
+				 */
+				if (ahd_inb(ahd, SEQINTCODE) != NO_SEQINT)
+					intstat |= SEQINT;
+			}
+		} else {
+			ahd_flush_device_writes(ahd);
+		}
+		ahd_run_qoutfifo(ahd);
+		ahd->cmdcmplt_counts[ahd->cmdcmplt_bucket]++;
+		ahd->cmdcmplt_total++;
+#ifdef AHD_TARGET_MODE
+		if ((ahd->flags & AHD_TARGETROLE) != 0)
+			ahd_run_tqinfifo(ahd, /*paused*/FALSE);
+#endif
+	}
+
+	/*
+	 * Handle statuses that may invalidate our cached
+	 * copy of INTSTAT separately.
+	 */
+	if (intstat == 0xFF && (ahd->features & AHD_REMOVABLE) != 0) {
+		/* Hot eject.  Do nothing */
+	} else if (intstat & HWERRINT) {
+		ahd_handle_hwerrint(ahd);
+	} else if ((intstat & (PCIINT|SPLTINT)) != 0) {
+		ahd->bus_intr(ahd);
+	} else {
+
+		if ((intstat & SEQINT) != 0)
+			ahd_handle_seqint(ahd, intstat);
+
+		if ((intstat & SCSIINT) != 0)
+			ahd_handle_scsiint(ahd, intstat);
+	}
+	return (1);
+}
+
+void
+ahd_unbusy_tcl(struct ahd_softc *ahd, u_int tcl)
+{
+	ahd_busy_tcl(ahd, tcl, SCB_LIST_NULL);
+}