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Redo the target/lun sw in a better way, and handle queue tag messages.

This commit is contained in:
bouyer 2000-10-18 17:01:13 +00:00
parent 9836ff3913
commit 75246b83c0
1 changed files with 137 additions and 68 deletions
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205
sys/dev/microcode/siop/siop.ss
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@ -1,4 +1,4 @@
; $NetBSD: siop.ss,v 1.9 2000/10/06 16:39:04 bouyer Exp $
; $NetBSD: siop.ss,v 1.10 2000/10/18 17:01:13 bouyer Exp $
;
; Copyright (c) 2000 Manuel Bouyer.
@ -42,14 +42,17 @@ ABSOLUTE t_status = 80;
ABSOLUTE t_data = 88;
;; interrupt codes
; interrupts that need a valid DSA
ABSOLUTE int_done = 0xff00;
ABSOLUTE int_msgin = 0xff01;
ABSOLUTE int_extmsgin = 0xff02;
ABSOLUTE int_extmsgdata = 0xff03;
ABSOLUTE int_resel = 0xff04;
ABSOLUTE int_reseltag = 0xff05;
ABSOLUTE int_resfail = 0xff06;
ABSOLUTE int_disc = 0xff07;
ABSOLUTE int_disc = 0xff04;
; interrupts that don't have a valid DSA
ABSOLUTE int_reseltarg = 0xff80;
ABSOLUTE int_resellun = 0xff81;
ABSOLUTE int_reseltag = 0xff82;
ABSOLUTE int_resfail = 0xff83;
ABSOLUTE int_err = 0xffff;
; flags for scratcha0
@ -57,10 +60,13 @@ ABSOLUTE flag_sdp = 0x01 ; got save data pointer
ABSOLUTE flag_data = 0x02 ; we're in data phase
ABSOLUTE flag_data_mask = 0xfd ; ~flag_data
; main script symbols
ENTRY waitphase;
ENTRY send_msgout;
ENTRY msgout;
ENTRY msgin;
ENTRY handle_msgin;
ENTRY msgin_ack;
ENTRY dataout;
ENTRY datain;
@ -68,44 +74,55 @@ ENTRY cmdout;
ENTRY status;
ENTRY disconnect;
ENTRY reselect;
ENTRY reselected;
ENTRY selected;
ENTRY script_sched;
ENTRY get_extmsgdata;
ENTRY resel_targ0;
ENTRY msgin_space;
ENTRY lunsw_return;
EXTERN abs_targ0;
EXTERN abs_msgin;
; lun switch symbols
ENTRY resel_lun0;
ENTRY restore_scntl3;
EXTERN abs_lun0;
EXTERN abs_lunsw_return;
; command reselect script symbols
ENTRY rdsa0;
ENTRY rdsa1;
ENTRY rdsa2;
ENTRY rdsa3;
ENTRY reload_dsa;
EXTERN resel_abs_reselected;
; command scheduler symbols
ENTRY slot;
ENTRY idsa0;
ENTRY idsa1;
ENTRY idsa2;
ENTRY idsa3;
ENTRY slotdata;
ENTRY nextslot;
ENTRY endslot;
EXTERN script_abs_sched;
EXTERN slot_nextp;
EXTERN slot_sched_addrsrc;
EXTERN slot_abs_reselect;
EXTERN slot_abs_selected;
EXTERN slot_abs_loaddsa;
EXTERN endslot_abs_reselect;
EXTERN abs_find_dsa;
ENTRY rtarget;
ENTRY rlun;
ENTRY rdsa0;
ENTRY rdsa1;
ENTRY rdsa2;
ENTRY rdsa3;
ENTRY rsxfer;
ENTRY rscntl3;
ENTRY res_nextld;
EXTERN resel_abs_selected;
; main script
PROC siop_script:
selected:
reselected:
; starting a new session, init 'local variables'
MOVE 0 to SCRATCHA0 ; flags
MOVE 0 to SCRATCHA1 ; DSA offset (for S/G save data pointer)
CLEAR ACK;
MOVE SCRATCHA3 to SFBR ; pending message ?
JUMP REL(handle_msgin), IF not 0x08;
waitphase:
JUMP REL(msgout), WHEN MSG_OUT;
JUMP REL(msgin), WHEN MSG_IN;
@ -117,28 +134,81 @@ err:
INT int_err;
reselect:
; Clear DSA and init status
MOVE 0xff to DSA0;
MOVE 0xff to DSA1;
MOVE 0xff to DSA2;
MOVE 0xff to DSA3;
MOVE 0xff to SCRATCHA2; no tag
MOVE 0x08 to SCRATCHA3; NOP message
WAIT RESELECT REL(reselect_fail)
MOVE SSID & 0x8f to SFBR
MOVE SFBR to SCRATCHA0 ; save reselect ID
; find the rigth param for this target
resel_targ0:
JUMP abs_targ0, IF 0xff;
JUMP abs_targ0, IF 0xff;
JUMP abs_targ0, IF 0xff;
JUMP abs_targ0, IF 0xff;
JUMP abs_targ0, IF 0xff;
JUMP abs_targ0, IF 0xff;
JUMP abs_targ0, IF 0xff;
JUMP abs_targ0, IF 0xff;
JUMP abs_targ0, IF 0xff;
JUMP abs_targ0, IF 0xff;
JUMP abs_targ0, IF 0xff;
JUMP abs_targ0, IF 0xff;
JUMP abs_targ0, IF 0xff;
JUMP abs_targ0, IF 0xff;
JUMP abs_targ0, IF 0xff;
INT int_reseltarg;
lunsw_return:
INT int_err, WHEN NOT MSG_IN;
MOVE FROM t_msg_in, WHEN MSG_IN;
MOVE SFBR & 0x07 to SCRATCHA2; save LUN
JUMP abs_find_dsa;
MOVE 1, abs_msgin, WHEN MSG_IN;
MOVE SFBR & 0x07 to SCRATCHA1; save LUN
CLEAR ACK;
RETURN, WHEN NOT MSG_IN; If no more message, jump to lun sw
MOVE 1, abs_msgin, WHEN MSG_IN;
CLEAR ACK;
JUMP REL(gettag), IF 0x20; simple tag message ?
MOVE SFBR to SCRATCHA3; save message
RETURN; jump to lun sw and handle message
gettag:
INT int_err, WHEN NOT MSG_IN;
MOVE 1, abs_msgin, WHEN MSG_IN; get tag
CLEAR ACK;
MOVE SFBR to SCRATCHA2; save tag
RETURN; jump to lun sw
reselect_fail:
; check that host asserted SIGP, this'll clear SIGP in ISTAT
MOVE CTEST2 & 0x40 TO SFBR;
INT int_resfail, IF 0x00;
script_sched:
; Clear DSA and init status
MOVE 0xff to DSA0;
MOVE 0xff to DSA1;
MOVE 0xff to DSA2;
MOVE 0xff to DSA3;
MOVE 0 to SCRATCHA0 ; flags
MOVE 0 to SCRATCHA1 ; DSA offset (for S/G save data pointer)
JUMP script_abs_sched;
handle_sdp:
CLEAR ACK;
MOVE SCRATCHA0 | flag_sdp TO SCRATCHA0;
; should get a disconnect message now
msgin:
CLEAR ATN
MOVE FROM t_msg_in, WHEN MSG_IN;
handle_msgin:
JUMP REL(handle_dis), IF 0x04 ; disconnect message
JUMP REL(handle_cmpl), IF 0x00 ; command complete message
JUMP REL(handle_sdp), IF 0x02 ; save data pointer message
JUMP REL(handle_extin), IF 0x01 ; extended message
INT int_msgin;
msgin_ack:
selected:
CLEAR ACK;
JUMP REL(waitphase);
@ -219,19 +289,15 @@ handle_dis:
CALL REL(disconnect);
; if we didn't get sdp, or if offset is 0, no need to interrupt
MOVE SCRATCHA0 & flag_sdp TO SFBR;
JUMP script_abs_sched, if 0x00;
JUMP REL(script_sched), if 0x00;
MOVE SCRATCHA1 TO SFBR;
JUMP script_abs_sched, if 0x00;
JUMP REL(script_sched), if 0x00;
; Ok, we need to save data pointers
INT int_disc;
handle_cmpl:
CALL REL(disconnect);
INT int_done;
handle_sdp:
CLEAR ACK;
MOVE SCRATCHA0 | flag_sdp TO SCRATCHA0;
JUMP REL(msgin) ; should get a disconnect message now
handle_extin:
CLEAR ACK;
@ -243,6 +309,9 @@ get_extmsgdata:
INT int_err, IF NOT MSG_IN;
MOVE FROM t_ext_msg_data, WHEN MSG_IN;
INT int_extmsgdata;
msgin_space:
NOP; space to store msgin when reselect
; script used for the scheduler: when a slot is free the JUMP points to
; the next slot so that instructions for this slot are not run.
@ -256,52 +325,52 @@ get_extmsgdata:
PROC slot_script:
slot:
JUMP REL(nextslot);
idsa0:
MOVE 0x00 to dsa0;
idsa1:
MOVE 0x01 to dsa1;
idsa2:
MOVE 0x02 to dsa2;
idsa3:
MOVE 0x03 to dsa3;
CALL slot_abs_loaddsa;
SELECT ATN FROM t_id, slot_abs_reselect;
MOVE MEMORY 4, slot_sched_addrsrc, slot_nextp;
JUMP slot_abs_selected;
slotdata:
NOP; slot variables: dsa & jumppatchp
nextslot: NOP; /* will be changed to the next slot entry
NOP; slot variables: jumppatchp
nextslot:
NOP; /* will be changed to the next slot entry
PROC endslot_script:
JUMP endslot_abs_reselect;
;; script used to find the DSA after a reselect.
;; each slot contain a target/lun identifier (when free target = 0xff, so it's
;; ignored) used to load the appropriate DSA for this reselect
;; per-target switch script for LUNs
; hack: we first to a call to the target-specific code, so that a return
; in the main switch will jump to the lun switch.
PROC lun_switch:
CALL REL(restore_scntl3);
MOVE SCRATCHA1 TO SFBR;
resel_lun0:
JUMP abs_lun0, IF 0x00;
JUMP abs_lun0, IF 0x01;
JUMP abs_lun0, IF 0x02;
JUMP abs_lun0, IF 0x03;
JUMP abs_lun0, IF 0x04;
JUMP abs_lun0, IF 0x05;
JUMP abs_lun0, IF 0x06;
JUMP abs_lun0, IF 0x07;
INT int_resellun;
restore_scntl3:
MOVE 0xff TO SCNTL3;
MOVE 0xff TO SXFER;
JUMP abs_lunsw_return;
PROC reselected_script:
MOVE SCRATCHA0 to SFBR; load ID
rtarget:
JUMP REL(res_nextid), IF NOT 0xff;
MOVE SCRATCHA2 to SFBR; load LUN
rlun:
JUMP REL(res_nextld), IF NOT 0xff;
;; script used to load the DSA after a reselect.
PROC load_dsa:
; Can't use MOVE MEMORY to load DSA, doesn't work I/O mapped
rdsa0:
MOVE 0x00 to dsa0;
MOVE 0xf0 to DSA0;
rdsa1:
MOVE 0x01 to dsa1;
MOVE 0xf1 to DSA1;
rdsa2:
MOVE 0x02 to dsa2;
MOVE 0xf2 to DSA2;
rdsa3:
MOVE 0x03 to dsa3;
; the select is here to reload sxfer and scntl3 from the table. As we're
; already reselected is always fais, and always jumps to the main script.
SELECT FROM t_id, resel_abs_selected;
res_nextld:
NOP ; MOVE SCRATCHA0 to SFBR
res_nextid:
NOP ; JUMP REL(res_nextid), IF NOT 0xff
PROC reselected_end_script:
INT int_resel;
INT int_resel; /* need two because res_nextld and res_nextid */
MOVE 0xf3 to DSA3;
RETURN;
reload_dsa:
CALL REL(rdsa0);
JUMP resel_abs_reselected;