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Performance optimizations. Unroll all bcopies. Use PIO to transfer SCBs
since setting up the DMA is too costly. Restructure for efficiency. Pause the sequencer when a parity error occurs so that the kernel driver knows during which phase the error was encountered.
This commit is contained in:
Justin T. Gibbs
parent
4dda2104dc
commit
5327d59536
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=13690
@ -6,7 +6,7 @@
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* All rights reserved.
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*
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*Modifications/enhancements:
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* Copyright (c) 1994, 1995 Justin Gibbs. All rights reserved.
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* Copyright (c) 1994, 1995, 1996 Justin Gibbs. All rights reserved.
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*
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*Redistribution and use in source and binary forms, with or without
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*modification, are permitted provided that the following conditions
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@ -41,28 +41,27 @@
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*
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*-M************************************************************************/
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VERSION AIC7XXX_SEQ_VER "$Id: aic7xxx.seq,v 1.28 1996/01/09 16:14:03 gibbs Exp $"
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VERSION AIC7XXX_SEQ_VER "$Id: aic7xxx.seq,v 1.29 1996/01/11 06:17:46 gibbs Exp $"
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#include "../../dev/aic7xxx/aic7xxx_reg.h"
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/*
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* We can't just use ACCUM in the sequencer code because it
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* must be treated specially by the assembler, and it currently
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* looks for the symbol 'A'. This is the only register defined
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* looks for the symbol 'A'. This is the only register defined in
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* the assembler's symbol space.
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*/
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A = ACCUM
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/* After starting the selection hardware, we return to the "poll_for_work"
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* loop so that we can check for reconnecting targets as well as for our
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* selection to complete just in case the reselection wins bus arbitration.
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* The problem with this is that we must keep track of the SCB that we've
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* already pulled from the QINFIFO and started the selection on just in case
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* the reselection wins so that we can retry the selection at a later time.
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* This problem cannot be resolved by holding a single entry in scratch
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* ram since a reconnecting target can request sense and this will create
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* yet another SCB waiting for selection. The solution used here is to
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* use byte 31 of the SCB as a psuedo-next pointer and to thread a list
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/* After starting the selection hardware, we check for reconnecting targets
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* as well as for our selection to complete just in case the reselection wins
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* bus arbitration. The problem with this is that we must keep track of the
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* SCB that we've already pulled from the QINFIFO and started the selection
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* on just in case the reselection wins so that we can retry the selection at
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* a later time. This problem cannot be resolved by holding a single entry
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* in scratch ram since a reconnecting target can request sense and this will
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* create yet another SCB waiting for selection. The solution used here is to
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* use byte 27 of the SCB as a psuedo-next pointer and to thread a list
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* of SCBs that are awaiting selection. Since 0-0xfe are valid SCB offsets,
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* SCB_LIST_NULL is 0xff which is out of range. The kernel driver must
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* add an entry to this list everytime a request sense occurs. The sequencer
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@ -70,8 +69,8 @@ A = ACCUM
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*/
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/*
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* Initialize any state idle loop state here. This code is executed on
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* startup and after every bus free.
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* Initialize any state valid during the idle loop here. This code is
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* executed on startup and after every bus free.
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*/
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start:
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mvi SCSISEQ,ENRSELI /* Always allow reselection */
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@ -91,42 +90,14 @@ start2:
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cmp WAITING_SCBH,SCB_LIST_NULL jne start_waiting
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test QINCNT,0xff jz poll_for_work
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/* We have at least one queued SCB now and we don't have any
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/*
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* We have at least one queued SCB now and we don't have any
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* SCBs in the list of SCBs awaiting selection. Set the SCB
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* pointer from the FIFO so we see the right bank of SCB
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* registers.
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*/
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mov SCBPTR,QINFIFO
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/*
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* If the control byte of this SCB has the NEEDDMA flag set, we have
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* yet to DMA it from host memory
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*/
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test SCB_CONTROL,NEEDDMA jz test_busy
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clr HCNT2
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clr HCNT1
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mvi HCNT0,SCB_SIZEOF
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mvi DINDEX,HADDR
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mvi SCB_PHYSADDR call bcopy_4
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mvi DFCNTRL,0xd /* HDMAEN|DIRECTION|FIFORESET */
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/*
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* Wait for DMA from host memory to data FIFO to complete, then disable
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* DMA and wait for it to acknowledge that it's off.
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*/
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call dma_finish
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/* Copy the SCB from the FIFO to the SCBARRAY */
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mvi DINDEX, SCBARRAY
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call bcopy_5_dfdat
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call bcopy_7_dfdat
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call bcopy_7_dfdat
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call bcopy_7_dfdat
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/*
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* See if there is not already an active SCB for this target. This code
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* locks out on a per target basis instead of target/lun. Although this
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@ -136,11 +107,10 @@ test SCB_CONTROL,NEEDDMA jz test_busy
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* to see if the added cost of the search is negligible. This code also
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* assumes that the kernel driver will clear the active flags on board
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* initialization, board reset, and a target SELTO. Tagged commands
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* don't set the active bits since you can have more than queue more
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* than one command at a time. We do, however, look to see if there
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* are any non-tagged I/Os in progress, and requeue the command if
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* there are. Tagged and non-tagged commands cannot be mixed to a
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* single target.
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* don't set the active bits since you can queue more than one command
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* at a time. We do, however, look to see if there are any non-tagged
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* I/Os in progress, and requeue the command if there are. Tagged and
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* non-tagged commands cannot be mixed to a single target.
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*/
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test_busy:
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@ -215,9 +185,10 @@ start_selection:
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mk_identify:
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and A,DISCENB,SCB_CONTROL /* mask off disconnect privledge */
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and SINDEX,0x7,SCB_TCL /* lun */
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or SINDEX,A /* or in disconnect privledge */
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or SINDEX,MSG_IDENTIFY call mk_mesg /* IDENTIFY message */
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and MSG0,0x7,SCB_TCL /* lun */
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or MSG0,A /* or in disconnect privledge */
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or MSG0,MSG_IDENTIFY
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mvi MSG_LEN, 1
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test SCB_CONTROL,0xb0 jz !message /* WDTR, SDTR or TAG?? */
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/*
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@ -236,6 +207,7 @@ mk_tag:
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mk_tag_done:
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test SCB_CONTROL,0x90 jz !message /* NEEDWDTR|NEEDSDTR */
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mov DINDEX call mk_dtr /* build DTR message if needed */
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!message:
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@ -251,11 +223,6 @@ wait_for_selection:
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reselect:
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clr MSG_LEN /* Don't have anything in the mesg buffer */
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mov SELID call initialize_scsiid
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mvi SAVED_TCL, 0xff /*
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* Fill with an imposible value so we
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* don't get false hits for a tag
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* without an identify.
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*/
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and FLAGS,0x03 /* clear target specific flags */
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or FLAGS,RESELECTED
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jmp select2
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@ -268,16 +235,6 @@ reselect:
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*/
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select:
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and FLAGS,0x03 /* Clear target flags */
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or SCB_CONTROL,NEEDDMA
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/*
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* Some drives will issue a simple tag message during
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* a tagged selection if they are immediately ready
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* to handle the command without a disconnect. Ensure
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* that SAVED_TCL (used in get_tag) is inialized correctly
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* during a selection for this reason.
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*/
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mov SAVED_TCL, SCB_TCL
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mov WAITING_SCBH,SCB_NEXT_WAITING
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select2:
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/*
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@ -285,8 +242,6 @@ select2:
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* with synchronous SCSI, if you do it later, you blow away some
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* data in the SCSI FIFO that the target has already sent to you.
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*/
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clr SIGSTATE
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or SXFRCTL0,CLRCHN
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/*
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* Initialize SCSIRATE with the appropriate value for this target.
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@ -312,9 +267,19 @@ ITloop:
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test SSTAT1,BUSFREE jnz p_busfree
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test SSTAT1,REQINIT jz ITloop
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and A,PHASE_MASK,SCSISIGI
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/*
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* If we've had a parity error, let the driver know before
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* we overwrite LASTPHASE.
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*/
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test SSTAT1, SCSIPERR jz parity_okay
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or CLRSINT1, CLRSCSIPERR
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mvi INTSTAT, PARITY_ERROR
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parity_okay:
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and A,PHASE_MASK,SCSISIGI
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mov LASTPHASE,A
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mov SCSISIGO,A
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mov A call scsisig
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cmp ALLZEROS,A je p_dataout
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cmp A,P_DATAIN je p_datain
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cmp A,P_COMMAND je p_command
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@ -336,8 +301,9 @@ p_dataout:
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* STCNT may have been cleared, so restore it from the residual field.
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*/
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data_phase_reinit:
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mvi DINDEX, STCNT
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mvi SCB_RESID_DCNT call bcopy_3
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mov STCNT0,SCB_RESID_DCNT0
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mov STCNT1,SCB_RESID_DCNT1
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mov STCNT2,SCB_RESID_DCNT2
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jmp data_phase_loop
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p_datain:
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@ -373,8 +339,6 @@ sg_advance:
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clr A /* add sizeof(struct scatter) */
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add SG_NEXT0,SG_SIZEOF,SG_NEXT0
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adc SG_NEXT1,A,SG_NEXT1
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adc SG_NEXT2,A,SG_NEXT2
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adc SG_NEXT3,A,SG_NEXT3
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/*
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* Load a struct scatter and set up the data address and length.
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@ -388,16 +352,23 @@ sg_load:
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clr HCNT1
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mvi HCNT0,SG_SIZEOF
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mvi DINDEX,HADDR
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mvi SG_NEXT call bcopy_4
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mov HADDR0,SG_NEXT0
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mov HADDR1,SG_NEXT1
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mov HADDR2,SG_NEXT2
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mov HADDR3,SG_NEXT3
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mvi DFCNTRL,0xd /* HDMAEN|DIRECTION|FIFORESET */
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or DFCNTRL,0xd /* HDMAEN|DIRECTION|FIFORESET */
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/*
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* Wait for DMA from host memory to data FIFO to complete, then disable
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* DMA and wait for it to acknowledge that it's off.
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*/
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call dma_finish
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dma_finish:
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test DFSTATUS,HDONE jz dma_finish
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/* Turn off DMA preserving WIDEODD */
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and DFCNTRL,WIDEODD
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dma_finish2:
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test DFCNTRL,HDMAENACK jnz dma_finish2
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/*
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* Copy data from FIFO into SCB data pointer and data count. This assumes
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@ -419,28 +390,39 @@ sg_load:
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* };
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*/
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mvi DINDEX,HADDR
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/*
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* For Linux, we must throw away four bytes since there is a 32bit gap
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* in the middle of a struct scatterlist
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*/
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#ifdef linux
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call bcopy_4_dfdat
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mov HADDR0,DFDAT
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mov HADDR1,DFDAT
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mov HADDR2,DFDAT
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mov HADDR3,DFDAT
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mov NONE,DFDAT
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mov NONE,DFDAT
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mov NONE,DFDAT
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mov NONE,DFDAT
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call bcopy_3_dfdat /* Only support 24 bit length. */
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mov HCNT0,DFDAT
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mov HCNT1,DFDAT
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mov HCNT2,DFDAT
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#else
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/*
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* For FreeBSD, just copy it wholesale
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*/
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call bcopy_7_dfdat
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mov HADDR0,DFDAT
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mov HADDR1,DFDAT
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mov HADDR2,DFDAT
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mov HADDR3,DFDAT
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mov HCNT0,DFDAT
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mov HCNT1,DFDAT
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mov HCNT2,DFDAT
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#endif
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/* Load STCNT as well. It is a mirror of HCNT */
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mvi DINDEX,STCNT
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mvi HCNT call bcopy_3
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mov STCNT0,HCNT0
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mov STCNT1,HCNT1
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mov STCNT2,HCNT2
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test SSTAT1,PHASEMIS jz data_phase_loop
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data_phase_finish:
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@ -449,8 +431,9 @@ data_phase_finish:
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* We use STCNT instead of HCNT, since it's a reflection of how many bytes
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* were transferred on the SCSI (as opposed to the host) bus.
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*/
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mvi DINDEX,SCB_RESID_DCNT
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mvi STCNT call bcopy_3
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mov SCB_RESID_DCNT0,STCNT0
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mov SCB_RESID_DCNT1,STCNT1
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mov SCB_RESID_DCNT2,STCNT2
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mov SCB_RESID_SGCNT, SG_COUNT
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jmp ITloop
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@ -465,11 +448,17 @@ p_command:
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/*
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* Load HADDR and HCNT. We can do this in one bcopy since they are neighbors
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*/
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mvi DINDEX,HADDR
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mvi SCB_CMDPTR call bcopy_7
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mov HADDR0, SCB_CMDPTR0
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mov HADDR1, SCB_CMDPTR1
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mov HADDR2, SCB_CMDPTR2
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mov HADDR3, SCB_CMDPTR3
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mov HCNT0, SCB_CMDLEN
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clr HCNT1
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clr HCNT2
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mvi DINDEX,STCNT
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mvi SCB_CMDLEN call bcopy_3
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mov STCNT0, HCNT0
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mov STCNT1, HCNT1
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mov STCNT2, HCNT2
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mvi 0x3d call dma # SCSIEN|SDMAEN|HDMAEN|
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# DIRECTION|FIFORESET
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@ -529,8 +518,7 @@ p_mesgout_snoop:
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test SSTAT1,PHASEMIS jnz p_mesgout_done
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or SINDEX,0x10,SIGSTATE /* turn on ATNO */
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call scsisig /* ATNO - re-assert ATN */
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or SCSISIGO,ATNO /* turn on ATNO */
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jmp ITloop
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@ -564,8 +552,7 @@ rej_mesgin:
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* present when we assert ATN. In any case, rejection should be a
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* rare occurrence - signal the driver when it happens.
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*/
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or SINDEX,0x10,SIGSTATE /* turn on ATNO */
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call scsisig
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or SCSISIGO,ATNO /* turn on ATNO */
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mvi INTSTAT,SEND_REJECT /* let driver know */
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mvi MSG_REJECT call mk_mesg
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@ -578,7 +565,7 @@ mesgin_done:
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mesgin_complete:
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/*
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* We got a "command complete" message, so put the SCB pointer
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* into the Queue Out, and trigger a completion interrupt.
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* into QUEUEOUT, and trigger a completion interrupt.
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* Check status for non zero return and interrupt driver if needed
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* This allows the driver to interpret errors only when they occur
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* instead of always uploading the scb. If the status is SCSI_CHECK,
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@ -672,8 +659,7 @@ p_mesginWDTR:
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and RETURN_1,0x7f /* Clear the SEND_WDTR Flag */
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mvi DINDEX,MSG0
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mvi MSG0 call mk_wdtr /* build WDTR message */
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or SINDEX,0x10,SIGSTATE /* turn on ATNO */
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call scsisig
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or SCSISIGO,ATNO /* turn on ATNO */
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jmp mesgin_done
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p_mesginSDTR:
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@ -689,8 +675,7 @@ p_mesginSDTR:
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*/
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mvi DINDEX, MSG0
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mvi MSG0 call mk_sdtr
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or SINDEX,0x10,SIGSTATE /* turn on ATNO */
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call scsisig
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or SCSISIGO,ATNO /* turn on ATNO */
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jmp mesgin_done
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/*
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@ -766,7 +751,7 @@ get_tag:
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jc abort_tag
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/*
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* Ensure that the SCB the tag points to is for an SCB transaction
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* Ensure that the SCB the tag points to is for a SCB transaction
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* to the reconnecting target.
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*/
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mov SCBPTR,ARG_1
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@ -776,8 +761,7 @@ get_tag:
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call inb_last /* Ack Successful tag */
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jmp setup_SCB
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abort_tag:
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or SINDEX,0x10,SIGSTATE /* turn on ATNO */
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call scsisig
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or SCSISIGO,ATNO /* turn on ATNO */
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mvi INTSTAT,ABORT_TAG /* let driver know */
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mvi 0xd call mk_mesg /* ABORT TAG message */
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jmp mesgin_done
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@ -811,6 +795,7 @@ p_busfree:
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test SCB_CMDLEN,0xff jz status_ok
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jmp start
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#if 0
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/*
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* Instead of a generic bcopy routine that requires an argument, we unroll
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* the cases that are actually used, and call them explicitly. This
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@ -830,19 +815,8 @@ bcopy_3:
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mov DINDIR,SINDIR
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mov DINDIR,SINDIR
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mov DINDIR,SINDIR ret
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#endif
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bcopy_7_dfdat:
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mov DINDIR,DFDAT
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mov DINDIR,DFDAT
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bcopy_5_dfdat:
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mov DINDIR,DFDAT
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bcopy_4_dfdat:
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mov DINDIR,DFDAT
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bcopy_3_dfdat:
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mov DINDIR,DFDAT
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mov DINDIR,DFDAT
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mov DINDIR,DFDAT ret
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/*
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* Locking the driver out, build a one-byte message passed in SINDEX
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* if there is no active message already. SINDEX is returned intact.
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@ -858,7 +832,7 @@ mk_mesg:
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* the conflict.
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*/
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mvi SEQCTL,0x10 /* !PAUSEDIS|FASTMODE */
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mvi INTSTAT,MSG_BUFFER_BUSY ret
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mvi INTSTAT,MSG_BUFFER_BUSY
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mk_mesg1:
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mvi MSG_LEN,1 /* length = 1 */
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@ -931,21 +905,12 @@ dma4:
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*/
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dma5:
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/* disable DMA, but maintain WIDEODD */
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and A, WIDEODD, SINDEX
|
||||
mov DFCNTRL, A
|
||||
and DFCNTRL,WIDEODD
|
||||
dma6:
|
||||
test DFCNTRL,0x38 jnz dma6 /* SCSIENACK|SDMAENACK|HDMAENACK */
|
||||
|
||||
ret
|
||||
|
||||
dma_finish:
|
||||
test DFSTATUS,HDONE jz dma_finish
|
||||
|
||||
clr DFCNTRL /* disable DMA */
|
||||
dma_finish2:
|
||||
test DFCNTRL,HDMAENACK jnz dma_finish2
|
||||
ret
|
||||
|
||||
/*
|
||||
* Common SCSI initialization for selection and reselection. Expects
|
||||
* the target SCSI ID to be in the upper four bits of SINDEX, and A's
|
||||
@ -988,24 +953,30 @@ findSCB1:
|
||||
mvi INTSTAT,NO_MATCH /* not found - signal kernel */
|
||||
mvi MSG_ABORT call mk_mesg /* ABORT message */
|
||||
|
||||
or SINDEX,0x10,SIGSTATE /* assert ATNO */
|
||||
call scsisig
|
||||
ret
|
||||
or SCSISIGO,ATNO ret /* assert ATNO */
|
||||
|
||||
/*
|
||||
* Make a working copy of the scatter-gather parameters from the SCB.
|
||||
*/
|
||||
sg_scb2ram:
|
||||
mvi DINDEX,HADDR
|
||||
mvi SCB_DATAPTR call bcopy_7
|
||||
mov HADDR0, SCB_DATAPTR0
|
||||
mov HADDR1, SCB_DATAPTR1
|
||||
mov HADDR2, SCB_DATAPTR2
|
||||
mov HADDR3, SCB_DATAPTR3
|
||||
mov HCNT0, SCB_DATACNT0
|
||||
mov HCNT1, SCB_DATACNT1
|
||||
mov HCNT2, SCB_DATACNT2
|
||||
|
||||
mvi DINDEX,STCNT
|
||||
mvi SCB_DATACNT call bcopy_3
|
||||
mov STCNT0, HCNT0
|
||||
mov STCNT1, HCNT1
|
||||
mov STCNT2, HCNT2
|
||||
|
||||
mov SG_COUNT,SCB_SGCOUNT
|
||||
|
||||
mvi DINDEX,SG_NEXT
|
||||
mvi SCB_SGPTR call bcopy_4
|
||||
ret
|
||||
mov SG_NEXT0, SCB_SGPTR0
|
||||
mov SG_NEXT1, SCB_SGPTR1
|
||||
mov SG_NEXT2, SCB_SGPTR2
|
||||
mov SG_NEXT3, SCB_SGPTR3 ret
|
||||
|
||||
/*
|
||||
* Copying RAM values back to SCB, for Save Data Pointers message, but
|
||||
@ -1017,17 +988,22 @@ sg_ram2scb:
|
||||
test FLAGS, DPHASE jz return
|
||||
mov SCB_SGCOUNT,SG_COUNT
|
||||
|
||||
mvi DINDEX,SCB_SGPTR
|
||||
mvi SG_NEXT call bcopy_4
|
||||
mov SCB_SGPTR0,SG_NEXT0
|
||||
mov SCB_SGPTR1,SG_NEXT1
|
||||
mov SCB_SGPTR2,SG_NEXT2
|
||||
mov SCB_SGPTR3,SG_NEXT3
|
||||
|
||||
mvi DINDEX,SCB_DATAPTR
|
||||
mvi SHADDR call bcopy_4
|
||||
mov SCB_DATAPTR0,SHADDR0
|
||||
mov SCB_DATAPTR1,SHADDR1
|
||||
mov SCB_DATAPTR2,SHADDR2
|
||||
mov SCB_DATAPTR3,SHADDR3
|
||||
|
||||
/*
|
||||
* Use the residual number since STCNT is corrupted by any message transfer
|
||||
*/
|
||||
mvi SCB_RESID_DCNT call bcopy_3
|
||||
ret
|
||||
mov SCB_DATACNT0,SCB_RESID_DCNT0
|
||||
mov SCB_DATACNT1,SCB_RESID_DCNT1
|
||||
mov SCB_DATACNT2,SCB_RESID_DCNT2 ret
|
||||
|
||||
/*
|
||||
* Add the array base TARG_SCRATCH to the target offset (the target address
|
||||
@ -1039,10 +1015,7 @@ ndx_dtr:
|
||||
test SBLKCTL,SELBUSB jz ndx_dtr_2
|
||||
or A,0x08 /* Channel B entries add 8 */
|
||||
ndx_dtr_2:
|
||||
add SINDEX,TARG_SCRATCH,A
|
||||
|
||||
mov FUNCTION1,SCSIID /* 3-bit target address decode */
|
||||
mov A,FUNCTION1 ret
|
||||
add SINDEX,TARG_SCRATCH,A ret
|
||||
|
||||
/*
|
||||
* If we need to negotiate transfer parameters, build the WDTR or SDTR message
|
||||
@ -1052,7 +1025,6 @@ ndx_dtr_2:
|
||||
* reject, you wouldn't be able to tell which message was the culpret.
|
||||
*/
|
||||
mk_dtr:
|
||||
test SCB_CONTROL,0x90 jz return /* NEEDWDTR|NEEDSDTR */
|
||||
test SCB_CONTROL,NEEDWDTR jnz mk_wdtr_16bit
|
||||
or FLAGS, MAXOFFSET /* Force an offset of 15 or 8 if WIDE */
|
||||
|
||||
@ -1093,18 +1065,6 @@ mk_wdtr:
|
||||
|
||||
add MSG_LEN,COMP_MSG0,DINDEX ret /* update message length */
|
||||
|
||||
/*
|
||||
* Set SCSI bus control signal state. This also saves the last-written
|
||||
* value into a location where the higher-level driver can read it - if
|
||||
* it has to send an ABORT or RESET message, then it needs to know this
|
||||
* so it can assert ATN without upsetting SCSISIGO. The new value is
|
||||
* expected in SINDEX. Change the actual state last to avoid contention
|
||||
* from the driver.
|
||||
*/
|
||||
scsisig:
|
||||
mov SIGSTATE,SINDEX
|
||||
mov SCSISIGO,SINDEX ret
|
||||
|
||||
sdtr_to_rate:
|
||||
call ndx_dtr /* index scratch space for target */
|
||||
shr A,SINDIR,0x4
|
||||
|
||||
@ -1,7 +1,7 @@
|
||||
/*
|
||||
* Aic7xxx register and scratch ram definitions.
|
||||
*
|
||||
* Copyright (c) 1994, 1995 Justin T. Gibbs.
|
||||
* Copyright (c) 1994, 1995, 1996 Justin T. Gibbs.
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
@ -18,7 +18,7 @@
|
||||
* 4. Modifications may be freely made to this file if the above conditions
|
||||
* are met.
|
||||
*
|
||||
* $Id: aic7xxx_reg.h,v 1.3 1996/01/07 19:18:28 gibbs Exp $
|
||||
* $Id: aic7xxx_reg.h,v 1.4 1996/01/11 06:17:49 gibbs Exp $
|
||||
*/
|
||||
|
||||
/*
|
||||
@ -69,21 +69,6 @@
|
||||
#define ACTNEGEN 0x02
|
||||
#define STPWEN 0x01 /* Powered Termination */
|
||||
|
||||
/*
|
||||
* SCSI Interrrupt Mode 1 (pp. 3-28,29).
|
||||
* Set bits in this register enable the corresponding
|
||||
* interrupt source.
|
||||
*/
|
||||
#define SIMODE1 0x011
|
||||
#define ENSELTIMO 0x80
|
||||
#define ENATNTARG 0x40
|
||||
#define ENSCSIRST 0x20
|
||||
#define ENPHASEMIS 0x10
|
||||
#define ENBUSFREE 0x08
|
||||
#define ENSCSIPERR 0x04
|
||||
#define ENPHASECHG 0x02
|
||||
#define ENREQINIT 0x01
|
||||
|
||||
/*
|
||||
* SCSI Control Signal Read Register (p. 3-15).
|
||||
* Reads the actual state of the SCSI bus pins
|
||||
@ -252,6 +237,10 @@
|
||||
* can be squewed by write ahead.
|
||||
*/
|
||||
#define SHADDR 0x014
|
||||
#define SHADDR0 0x014
|
||||
#define SHADDR1 0x015
|
||||
#define SHADDR2 0x016
|
||||
#define SHADDR3 0x017
|
||||
|
||||
/*
|
||||
* Selection/Reselection ID (p. 3-31)
|
||||
@ -275,10 +264,12 @@
|
||||
#define DIAGLEDON 0x40 /* Aic78X0 only */
|
||||
#define AUTOFLUSHDIS 0x20
|
||||
/* UNUSED 0x10 */
|
||||
#define SELBUS_MASK 0x0a
|
||||
#define SELBUSB 0x08
|
||||
/* UNUSED 0x04 */
|
||||
#define SELWIDE 0x02
|
||||
/* UNUSED 0x01 */
|
||||
#define SELNARROW 0x00
|
||||
|
||||
/*
|
||||
* Sequencer Control (p. 3-33)
|
||||
@ -433,6 +424,10 @@
|
||||
* when we were expecting
|
||||
* another msgin byte.
|
||||
*/
|
||||
#define PARITY_ERROR 0xe1 /*
|
||||
* Sequencer detected a parity
|
||||
* error.
|
||||
*/
|
||||
#define BRKADRINT 0x08
|
||||
#define SCSIINT 0x04
|
||||
#define CMDCMPLT 0x02
|
||||
@ -525,7 +520,6 @@
|
||||
#define DISCENB 0x40
|
||||
#define TAG_ENB 0x20
|
||||
#define NEEDSDTR 0x10
|
||||
#define NEEDDMA 0x08
|
||||
#define DISCONNECTED 0x04
|
||||
#define SCB_TAG_TYPE 0x03
|
||||
#define SCB_TCL 0x0a1
|
||||
@ -557,31 +551,23 @@
|
||||
#define SCB_CMDPTR2 0x0b6
|
||||
#define SCB_CMDPTR3 0x0b7
|
||||
#define SCB_CMDLEN 0x0b8
|
||||
/* RESERVED - MUST BE ZERO 0x0b9 */
|
||||
/* RESERVED - MUST BE ZERO 0x0ba */
|
||||
#define SCB_NEXT_WAITING 0x0bb
|
||||
#define SCB_PHYSADDR 0x0bc
|
||||
#define SCB_PHYSADDR0 0x0bc
|
||||
#define SCB_PHYSADDR1 0x0bd
|
||||
#define SCB_PHYSADDR2 0x0be
|
||||
#define SCB_PHYSADDR3 0x0bf
|
||||
#define SCB_NEXT_WAITING 0x0b9
|
||||
|
||||
#ifdef LINUX
|
||||
#ifdef linux
|
||||
#define SG_SIZEOF 0x0c /* sizeof(struct scatterlist) */
|
||||
#else
|
||||
#define SG_SIZEOF 0x08 /* sizeof(struct ahc_dma) */
|
||||
#endif
|
||||
#define SCB_SIZEOF 0x1a /* sizeof SCB to DMA */
|
||||
|
||||
/* --------------------- AHA-2840-only definitions -------------------- */
|
||||
|
||||
#define SEECTL_2840 0xcc0
|
||||
#define SEECTL_2840 0x0c0
|
||||
/* UNUSED 0xf8 */
|
||||
#define CS_2840 0x04
|
||||
#define CK_2840 0x02
|
||||
#define DO_2840 0x01
|
||||
|
||||
#define STATUS_2840 0xcc1
|
||||
#define STATUS_2840 0x0c1
|
||||
#define EEPROM_TF 0x80
|
||||
#define BIOS_SEL 0x60
|
||||
#define ADSEL 0x1e
|
||||
@ -676,6 +662,7 @@
|
||||
* specified in the AHA2742 technical reference manual and are initialized
|
||||
* by the BIOS at boot time.
|
||||
*/
|
||||
#define LASTPHASE 0x049
|
||||
#define ARG_1 0x04a
|
||||
#define RETURN_1 0x04a
|
||||
#define SEND_SENSE 0x80
|
||||
@ -755,6 +742,3 @@
|
||||
|
||||
#define MAX_OFFSET_8BIT 0x0f
|
||||
#define MAX_OFFSET_16BIT 0x08
|
||||
|
||||
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user