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authorHannes Reinecke <hare@suse.de>2006-01-12 14:08:06 +0300
committerJames Bottomley <jejb@mulgrave.(none)>2006-01-12 21:03:50 +0300
commit11668bb673c41ec169a85d0b52c538a1c11d29e1 (patch)
tree423c30e22eea305d5c059c6463bdd226c1734bf4 /drivers/scsi/aic7xxx/aic79xx.seq
parentba62cd2d01e401faa5d5a25fa8e990d0b1a1996a (diff)
downloadlinux-11668bb673c41ec169a85d0b52c538a1c11d29e1.tar.xz
[SCSI] aic79xx: Sequencer update
Update sequencer code to Adaptec version 2.0.12-6.3.9. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/aic7xxx/aic79xx.seq')
-rw-r--r--drivers/scsi/aic7xxx/aic79xx.seq241
1 files changed, 188 insertions, 53 deletions
diff --git a/drivers/scsi/aic7xxx/aic79xx.seq b/drivers/scsi/aic7xxx/aic79xx.seq
index 65339bc1ca99..bef1f9d369b6 100644
--- a/drivers/scsi/aic7xxx/aic79xx.seq
+++ b/drivers/scsi/aic7xxx/aic79xx.seq
@@ -40,7 +40,7 @@
* $FreeBSD$
*/
-VERSION = "$Id: //depot/aic7xxx/aic7xxx/aic79xx.seq#99 $"
+VERSION = "$Id: //depot/aic7xxx/aic7xxx/aic79xx.seq#119 $"
PATCH_ARG_LIST = "struct ahd_softc *ahd"
PREFIX = "ahd_"
@@ -68,13 +68,47 @@ no_error_set:
}
SET_MODE(M_SCSI, M_SCSI)
test SCSISEQ0, ENSELO|ENARBO jnz idle_loop_checkbus;
- test SEQ_FLAGS2, SELECTOUT_QFROZEN jnz idle_loop_checkbus;
+ test SEQ_FLAGS2, SELECTOUT_QFROZEN jz check_waiting_list;
+ /*
+ * If the kernel has caught up with us, thaw the queue.
+ */
+ mov A, KERNEL_QFREEZE_COUNT;
+ cmp QFREEZE_COUNT, A jne check_frozen_completions;
+ mov A, KERNEL_QFREEZE_COUNT[1];
+ cmp QFREEZE_COUNT[1], A jne check_frozen_completions;
+ and SEQ_FLAGS2, ~SELECTOUT_QFROZEN;
+ jmp check_waiting_list;
+check_frozen_completions:
+ test SSTAT0, SELDO|SELINGO jnz idle_loop_checkbus;
+BEGIN_CRITICAL;
+ /*
+ * If we have completions stalled waiting for the qfreeze
+ * to take effect, move them over to the complete_scb list
+ * now that no selections are pending.
+ */
+ cmp COMPLETE_ON_QFREEZE_HEAD[1],SCB_LIST_NULL je idle_loop_checkbus;
+ /*
+ * Find the end of the qfreeze list. The first element has
+ * to be treated specially.
+ */
+ bmov SCBPTR, COMPLETE_ON_QFREEZE_HEAD, 2;
+ cmp SCB_NEXT_COMPLETE[1], SCB_LIST_NULL je join_lists;
+ /*
+ * Now the normal loop.
+ */
+ bmov SCBPTR, SCB_NEXT_COMPLETE, 2;
+ cmp SCB_NEXT_COMPLETE[1], SCB_LIST_NULL jne . - 1;
+join_lists:
+ bmov SCB_NEXT_COMPLETE, COMPLETE_SCB_HEAD, 2;
+ bmov COMPLETE_SCB_HEAD, COMPLETE_ON_QFREEZE_HEAD, 2;
+ mvi COMPLETE_ON_QFREEZE_HEAD[1], SCB_LIST_NULL;
+ jmp idle_loop_checkbus;
+check_waiting_list:
cmp WAITING_TID_HEAD[1], SCB_LIST_NULL je idle_loop_checkbus;
/*
* ENSELO is cleared by a SELDO, so we must test for SELDO
* one last time.
*/
-BEGIN_CRITICAL;
test SSTAT0, SELDO jnz select_out;
END_CRITICAL;
call start_selection;
@@ -90,6 +124,13 @@ idle_loop_check_nonpackreq:
test SSTAT2, NONPACKREQ jz . + 2;
call unexpected_nonpkt_phase_find_ctxt;
if ((ahd->bugs & AHD_FAINT_LED_BUG) != 0) {
+ /*
+ * On Rev A. hardware, the busy LED is only
+ * turned on automaically during selections
+ * and re-selections. Make the LED status
+ * more useful by forcing it to be on so
+ * long as one of our data FIFOs is active.
+ */
and A, FIFO0FREE|FIFO1FREE, DFFSTAT;
cmp A, FIFO0FREE|FIFO1FREE jne . + 3;
and SBLKCTL, ~DIAGLEDEN|DIAGLEDON;
@@ -101,9 +142,9 @@ idle_loop_check_nonpackreq:
call idle_loop_cchan;
jmp idle_loop;
-BEGIN_CRITICAL;
idle_loop_gsfifo:
SET_MODE(M_SCSI, M_SCSI)
+BEGIN_CRITICAL;
idle_loop_gsfifo_in_scsi_mode:
test LQISTAT2, LQIGSAVAIL jz return;
/*
@@ -152,11 +193,15 @@ END_CRITICAL;
idle_loop_service_fifos:
SET_MODE(M_DFF0, M_DFF0)
+BEGIN_CRITICAL;
test LONGJMP_ADDR[1], INVALID_ADDR jnz idle_loop_next_fifo;
call longjmp;
+END_CRITICAL;
idle_loop_next_fifo:
SET_MODE(M_DFF1, M_DFF1)
+BEGIN_CRITICAL;
test LONGJMP_ADDR[1], INVALID_ADDR jz longjmp;
+END_CRITICAL;
return:
ret;
@@ -170,7 +215,6 @@ BEGIN_CRITICAL;
test CCSCBCTL, CCARREN|CCSCBEN jz scbdma_idle;
test CCSCBCTL, CCSCBDIR jnz fetch_new_scb_inprog;
test CCSCBCTL, CCSCBDONE jz return;
-END_CRITICAL;
/* FALLTHROUGH */
scbdma_tohost_done:
test CCSCBCTL, CCARREN jz fill_qoutfifo_dmadone;
@@ -180,26 +224,18 @@ scbdma_tohost_done:
* bad SCSI status (currently only for underruns), we
* queue the SCB for normal completion. Otherwise, we
* wait until any select-out activity has halted, and
- * then notify the host so that the transaction can be
- * dealt with.
+ * then queue the completion.
*/
- test SCB_SCSI_STATUS, 0xff jnz scbdma_notify_host;
and CCSCBCTL, ~(CCARREN|CCSCBEN);
bmov COMPLETE_DMA_SCB_HEAD, SCB_NEXT_COMPLETE, 2;
+ cmp SCB_NEXT_COMPLETE[1], SCB_LIST_NULL jne . + 2;
+ mvi COMPLETE_DMA_SCB_TAIL[1], SCB_LIST_NULL;
+ test SCB_SCSI_STATUS, 0xff jz scbdma_queue_completion;
+ bmov SCB_NEXT_COMPLETE, COMPLETE_ON_QFREEZE_HEAD, 2;
+ bmov COMPLETE_ON_QFREEZE_HEAD, SCBPTR, 2 ret;
+scbdma_queue_completion:
bmov SCB_NEXT_COMPLETE, COMPLETE_SCB_HEAD, 2;
bmov COMPLETE_SCB_HEAD, SCBPTR, 2 ret;
-scbdma_notify_host:
- SET_MODE(M_SCSI, M_SCSI)
- test SCSISEQ0, ENSELO jnz return;
- test SSTAT0, (SELDO|SELINGO) jnz return;
- SET_MODE(M_CCHAN, M_CCHAN)
- /*
- * Remove SCB and notify host.
- */
- and CCSCBCTL, ~(CCARREN|CCSCBEN);
- bmov COMPLETE_DMA_SCB_HEAD, SCB_NEXT_COMPLETE, 2;
- SET_SEQINTCODE(BAD_SCB_STATUS)
- ret;
fill_qoutfifo_dmadone:
and CCSCBCTL, ~(CCARREN|CCSCBEN);
call qoutfifo_updated;
@@ -208,6 +244,7 @@ fill_qoutfifo_dmadone:
test QOFF_CTLSTA, SDSCB_ROLLOVR jz return;
bmov QOUTFIFO_NEXT_ADDR, SHARED_DATA_ADDR, 4;
xor QOUTFIFO_ENTRY_VALID_TAG, QOUTFIFO_ENTRY_VALID_TOGGLE ret;
+END_CRITICAL;
qoutfifo_updated:
/*
@@ -324,14 +361,15 @@ fill_qoutfifo:
* Keep track of the SCBs we are dmaing just
* in case the DMA fails or is aborted.
*/
- mov A, QOUTFIFO_ENTRY_VALID_TAG;
bmov COMPLETE_SCB_DMAINPROG_HEAD, COMPLETE_SCB_HEAD, 2;
mvi CCSCBCTL, CCSCBRESET;
bmov SCBHADDR, QOUTFIFO_NEXT_ADDR, 4;
+ mov A, QOUTFIFO_NEXT_ADDR;
bmov SCBPTR, COMPLETE_SCB_HEAD, 2;
fill_qoutfifo_loop:
- mov CCSCBRAM, SCBPTR;
- or CCSCBRAM, A, SCBPTR[1];
+ bmov CCSCBRAM, SCBPTR, 2;
+ mov CCSCBRAM, SCB_SGPTR[0];
+ mov CCSCBRAM, QOUTFIFO_ENTRY_VALID_TAG;
mov NONE, SDSCB_QOFF;
inc INT_COALESCING_CMDCOUNT;
add CMDS_PENDING, -1;
@@ -339,6 +377,18 @@ fill_qoutfifo_loop:
cmp SCB_NEXT_COMPLETE[1], SCB_LIST_NULL je fill_qoutfifo_done;
cmp CCSCBADDR, CCSCBADDR_MAX je fill_qoutfifo_done;
test QOFF_CTLSTA, SDSCB_ROLLOVR jnz fill_qoutfifo_done;
+ /*
+ * Don't cross an ADB or Cachline boundary when DMA'ing
+ * completion entries. In PCI mode, at least in 32/33
+ * configurations, the SCB DMA engine may lose its place
+ * in the data-stream should the target force a retry on
+ * something other than an 8byte aligned boundary. In
+ * PCI-X mode, we do this to avoid split transactions since
+ * many chipsets seem to be unable to format proper split
+ * completions to continue the data transfer.
+ */
+ add SINDEX, A, CCSCBADDR;
+ test SINDEX, CACHELINE_MASK jz fill_qoutfifo_done;
bmov SCBPTR, SCB_NEXT_COMPLETE, 2;
jmp fill_qoutfifo_loop;
fill_qoutfifo_done:
@@ -354,7 +404,6 @@ dma_complete_scb:
bmov SCBPTR, COMPLETE_DMA_SCB_HEAD, 2;
bmov SCBHADDR, SCB_BUSADDR, 4;
mvi CCARREN|CCSCBEN|CCSCBRESET jmp dma_scb;
-END_CRITICAL;
/*
* Either post or fetch an SCB from host memory. The caller
@@ -371,9 +420,19 @@ dma_scb:
mvi SCBHCNT, SCB_TRANSFER_SIZE;
mov CCSCBCTL, SINDEX ret;
-BEGIN_CRITICAL;
setjmp:
- bmov LONGJMP_ADDR, STACK, 2 ret;
+ /*
+ * At least on the A, a return in the same
+ * instruction as the bmov results in a return
+ * to the caller, not to the new address at the
+ * top of the stack. Since we want the latter
+ * (we use setjmp to register a handler from an
+ * interrupt context but not invoke that handler
+ * until we return to our idle loop), use a
+ * separate ret instruction.
+ */
+ bmov LONGJMP_ADDR, STACK, 2;
+ ret;
setjmp_inline:
bmov LONGJMP_ADDR, STACK, 2;
longjmp:
@@ -392,11 +451,6 @@ set_mode_work_around:
mvi SEQINTCTL, INTVEC1DSL;
mov MODE_PTR, SINDEX;
clr SEQINTCTL ret;
-
-toggle_dff_mode_work_around:
- mvi SEQINTCTL, INTVEC1DSL;
- xor MODE_PTR, MK_MODE(M_DFF1, M_DFF1);
- clr SEQINTCTL ret;
}
@@ -490,6 +544,21 @@ allocate_fifo1:
SET_SRC_MODE M_SCSI;
SET_DST_MODE M_SCSI;
select_in:
+ if ((ahd->bugs & AHD_FAINT_LED_BUG) != 0) {
+ /*
+ * On Rev A. hardware, the busy LED is only
+ * turned on automaically during selections
+ * and re-selections. Make the LED status
+ * more useful by forcing it to be on from
+ * the point of selection until our idle
+ * loop determines that neither of our FIFOs
+ * are busy. This handles the non-packetized
+ * case nicely as we will not return to the
+ * idle loop until the busfree at the end of
+ * each transaction.
+ */
+ or SBLKCTL, DIAGLEDEN|DIAGLEDON;
+ }
if ((ahd->bugs & AHD_BUSFREEREV_BUG) != 0) {
/*
* Test to ensure that the bus has not
@@ -528,6 +597,21 @@ SET_SRC_MODE M_SCSI;
SET_DST_MODE M_SCSI;
select_out:
BEGIN_CRITICAL;
+ if ((ahd->bugs & AHD_FAINT_LED_BUG) != 0) {
+ /*
+ * On Rev A. hardware, the busy LED is only
+ * turned on automaically during selections
+ * and re-selections. Make the LED status
+ * more useful by forcing it to be on from
+ * the point of re-selection until our idle
+ * loop determines that neither of our FIFOs
+ * are busy. This handles the non-packetized
+ * case nicely as we will not return to the
+ * idle loop until the busfree at the end of
+ * each transaction.
+ */
+ or SBLKCTL, DIAGLEDEN|DIAGLEDON;
+ }
/* Clear out all SCBs that have been successfully sent. */
if ((ahd->bugs & AHD_SENT_SCB_UPDATE_BUG) != 0) {
/*
@@ -1000,15 +1084,9 @@ not_found_ITloop:
/*
* We received a "command complete" message. Put the SCB on the complete
* queue and trigger a completion interrupt via the idle loop. Before doing
- * so, check to see if there
- * is a residual or the status byte is something other than STATUS_GOOD (0).
- * In either of these conditions, we upload the SCB back to the host so it can
- * process this information. In the case of a non zero status byte, we
- * additionally interrupt the kernel driver synchronously, allowing it to
- * decide if sense should be retrieved. If the kernel driver wishes to request
- * sense, it will fill the kernel SCB with a request sense command, requeue
- * it to the QINFIFO and tell us not to post to the QOUTFIFO by setting
- * RETURN_1 to SEND_SENSE.
+ * so, check to see if there is a residual or the status byte is something
+ * other than STATUS_GOOD (0). In either of these conditions, we upload the
+ * SCB back to the host so it can process this information.
*/
mesgin_complete:
@@ -1053,6 +1131,7 @@ complete_nomsg:
call queue_scb_completion;
jmp await_busfree;
+BEGIN_CRITICAL;
freeze_queue:
/* Cancel any pending select-out. */
test SSTAT0, SELDO|SELINGO jnz . + 2;
@@ -1063,6 +1142,7 @@ freeze_queue:
adc QFREEZE_COUNT[1], A;
or SEQ_FLAGS2, SELECTOUT_QFROZEN;
mov A, ACCUM_SAVE ret;
+END_CRITICAL;
/*
* Complete the current FIFO's SCB if data for this same
@@ -1085,8 +1165,10 @@ queue_scb_completion:
test SCB_SGPTR, SG_FULL_RESID jnz upload_scb;/* Never xfered */
test SCB_RESIDUAL_SGPTR, SG_LIST_NULL jz upload_scb;
complete:
+BEGIN_CRITICAL;
bmov SCB_NEXT_COMPLETE, COMPLETE_SCB_HEAD, 2;
bmov COMPLETE_SCB_HEAD, SCBPTR, 2 ret;
+END_CRITICAL;
bad_status:
cmp SCB_SCSI_STATUS, STATUS_PKT_SENSE je upload_scb;
call freeze_queue;
@@ -1097,9 +1179,18 @@ upload_scb:
* it on the host.
*/
bmov SCB_TAG, SCBPTR, 2;
- bmov SCB_NEXT_COMPLETE, COMPLETE_DMA_SCB_HEAD, 2;
+BEGIN_CRITICAL;
+ or SCB_SGPTR, SG_STATUS_VALID;
+ mvi SCB_NEXT_COMPLETE[1], SCB_LIST_NULL;
+ cmp COMPLETE_DMA_SCB_HEAD[1], SCB_LIST_NULL jne add_dma_scb_tail;
bmov COMPLETE_DMA_SCB_HEAD, SCBPTR, 2;
- or SCB_SGPTR, SG_STATUS_VALID ret;
+ bmov COMPLETE_DMA_SCB_TAIL, SCBPTR, 2 ret;
+add_dma_scb_tail:
+ bmov REG0, SCBPTR, 2;
+ bmov SCBPTR, COMPLETE_DMA_SCB_TAIL, 2;
+ bmov SCB_NEXT_COMPLETE, REG0, 2;
+ bmov COMPLETE_DMA_SCB_TAIL, REG0, 2 ret;
+END_CRITICAL;
/*
* Is it a disconnect message? Set a flag in the SCB to remind us
@@ -1146,8 +1237,18 @@ SET_DST_MODE M_DFF1;
await_busfree_clrchn:
mvi DFFSXFRCTL, CLRCHN;
await_busfree_not_m_dff:
- call clear_target_state;
+ /* clear target specific flags */
+ mvi SEQ_FLAGS, NOT_IDENTIFIED|NO_CDB_SENT;
test SSTAT1,REQINIT|BUSFREE jz .;
+ /*
+ * We only set BUSFREE status once either a new
+ * phase has been detected or we are really
+ * BUSFREE. This allows the driver to know
+ * that we are active on the bus even though
+ * no identified transaction exists should a
+ * timeout occur while awaiting busfree.
+ */
+ mvi LASTPHASE, P_BUSFREE;
test SSTAT1, BUSFREE jnz idle_loop;
SET_SEQINTCODE(MISSED_BUSFREE)
@@ -1202,11 +1303,6 @@ msgin_rdptrs_get_fifo:
call allocate_fifo;
jmp mesgin_done;
-clear_target_state:
- mvi LASTPHASE, P_BUSFREE;
- /* clear target specific flags */
- mvi SEQ_FLAGS, NOT_IDENTIFIED|NO_CDB_SENT ret;
-
phase_lock:
if ((ahd->bugs & AHD_EARLY_REQ_BUG) != 0) {
/*
@@ -1298,6 +1394,47 @@ service_fifo:
test CCSGCTL, CCSGENACK jnz return;
/*
+ * Should the other FIFO get the S/G cache first? If
+ * both FIFOs have been allocated since we last checked
+ * any FIFO, it is important that we service a FIFO
+ * that is not actively on the bus first. This guarantees
+ * that a FIFO will be freed to handle snapshot requests for
+ * any FIFO that is still on the bus. Chips with RTI do not
+ * perform snapshots, so don't bother with this test there.
+ */
+ if ((ahd->features & AHD_RTI) == 0) {
+ /*
+ * If we're not still receiving SCSI data,
+ * it is safe to allocate the S/G cache to
+ * this FIFO.
+ */
+ test DFCNTRL, SCSIEN jz idle_sgfetch_start;
+
+ /*
+ * Switch to the other FIFO. Non-RTI chips
+ * also have the "set mode" bug, so we must
+ * disable interrupts during the switch.
+ */
+ mvi SEQINTCTL, INTVEC1DSL;
+ xor MODE_PTR, MK_MODE(M_DFF1, M_DFF1);
+
+ /*
+ * If the other FIFO needs loading, then it
+ * must not have claimed the S/G cache yet
+ * (SG_CACHE_AVAIL would have been cleared in
+ * the orginal FIFO mode and we test this above).
+ * Return to the idle loop so we can process the
+ * FIFO not currently on the bus first.
+ */
+ test SG_STATE, LOADING_NEEDED jz idle_sgfetch_okay;
+ clr SEQINTCTL ret;
+idle_sgfetch_okay:
+ xor MODE_PTR, MK_MODE(M_DFF1, M_DFF1);
+ clr SEQINTCTL;
+ }
+
+idle_sgfetch_start:
+ /*
* We fetch a "cacheline aligned" and sized amount of data
* so we don't end up referencing a non-existant page.
* Cacheline aligned is in quotes because the kernel will
@@ -1308,7 +1445,7 @@ service_fifo:
mvi SGHCNT, SG_PREFETCH_CNT;
if ((ahd->bugs & AHD_REG_SLOW_SETTLE_BUG) != 0) {
/*
- * Need two instruction between "touches" of SGHADDR.
+ * Need two instructions between "touches" of SGHADDR.
*/
nop;
}
@@ -1658,7 +1795,7 @@ export seq_isr:
* savepointer in the current FIFO. We do this so that
* a pending CTXTDONE or SAVEPTR is visible in the active
* FIFO. This status is the only way we can detect if we
- * have lost the race (e.g. host paused us) and our attepts
+ * have lost the race (e.g. host paused us) and our attempts
* to disable the channel occurred after all REQs were
* already seen and acked (REQINIT never comes true).
*/
@@ -1667,7 +1804,7 @@ export seq_isr:
test DFCNTRL, DIRECTION jz interrupt_return;
and DFCNTRL, ~SCSIEN;
snapshot_wait_data_valid:
- test SEQINTSRC, (CTXTDONE|SAVEPTRS) jnz snapshot_data_valid;
+ test SEQINTSRC, (CTXTDONE|SAVEPTRS) jnz interrupt_return;
test SSTAT1, REQINIT jz snapshot_wait_data_valid;
snapshot_data_valid:
or DFCNTRL, SCSIEN;
@@ -1834,7 +1971,6 @@ pkt_saveptrs_check_status:
dec SCB_FIFO_USE_COUNT;
test SCB_CONTROL, STATUS_RCVD jnz pkt_complete_scb_if_fifos_idle;
mvi DFFSXFRCTL, CLRCHN ret;
-END_CRITICAL;
/*
* LAST_SEG_DONE status has been seen in the current FIFO.
@@ -1843,7 +1979,6 @@ END_CRITICAL;
* Check for overrun and see if we can complete this command.
*/
pkt_last_seg_done:
-BEGIN_CRITICAL;
/*
* Mark transfer as completed.
*/