| aic7xxx.seq (24662) | aic7xxx.seq (24794) |
|---|---|
| 1/*+M*********************************************************************** 2 *Adaptec 274x/284x/294x device driver for Linux and FreeBSD. 3 * 4 *Copyright (c) 1994 John Aycock 5 * The University of Calgary Department of Computer Science. 6 * All rights reserved. 7 * 8 *FreeBSD, Twin, Wide, 2 command per target support, tagged queuing, --- 23 unchanged lines hidden (view full) --- 32 *FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 *DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 *OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 *HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 *LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 *OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 *SUCH DAMAGE. 39 * | 1/*+M*********************************************************************** 2 *Adaptec 274x/284x/294x device driver for Linux and FreeBSD. 3 * 4 *Copyright (c) 1994 John Aycock 5 * The University of Calgary Department of Computer Science. 6 * All rights reserved. 7 * 8 *FreeBSD, Twin, Wide, 2 command per target support, tagged queuing, --- 23 unchanged lines hidden (view full) --- 32 *FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 *DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 *OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 *HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 *LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 *OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 *SUCH DAMAGE. 39 * |
| 40 * $Id: aic7xxx.seq,v 1.68 1997/04/04 19:35:30 gibbs Exp $ | 40 * $Id: aic7xxx.seq,v 1.69 1997/04/05 22:03:47 gibbs Exp $ |
| 41 * 42 *-M************************************************************************/ 43 44#include <dev/aic7xxx/aic7xxx.reg> 45#include <scsi/scsi_message.h> 46 47/* 48 * A few words on the waiting SCB list: --- 256 unchanged lines hidden (view full) --- 305/* 306 * Main loop for information transfer phases. If BSY is false, then 307 * we have a bus free condition, expected or not. Otherwise, wait 308 * for the target to assert REQ before checking MSG, C/D and I/O 309 * for the bus phase. 310 * 311 */ 312ITloop: | 41 * 42 *-M************************************************************************/ 43 44#include <dev/aic7xxx/aic7xxx.reg> 45#include <scsi/scsi_message.h> 46 47/* 48 * A few words on the waiting SCB list: --- 256 unchanged lines hidden (view full) --- 305/* 306 * Main loop for information transfer phases. If BSY is false, then 307 * we have a bus free condition, expected or not. Otherwise, wait 308 * for the target to assert REQ before checking MSG, C/D and I/O 309 * for the bus phase. 310 * 311 */ 312ITloop: |
| 313 test SSTAT1,REQINIT jz ITloop; | 313 test SSTAT1,REQINIT jz ITloop; 314 test SSTAT1, SCSIPERR jnz ITloop; |
| 314 315 and A,PHASE_MASK,SCSISIGI; 316 mov LASTPHASE,A; 317 mov SCSISIGO,A; 318 319 cmp ALLZEROS,A je p_dataout; 320 cmp A,P_DATAIN je p_datain; 321 cmp A,P_COMMAND je p_command; 322 cmp A,P_MESGOUT je p_mesgout; 323 cmp A,P_STATUS je p_status; 324 cmp A,P_MESGIN je p_mesgin; 325 326 mvi INTSTAT,BAD_PHASE; /* unknown phase - signal driver */ 327 jmp ITloop; /* Try reading the bus again. */ 328 329await_busfree: 330 and SIMODE1, ~ENBUSFREE; | 315 316 and A,PHASE_MASK,SCSISIGI; 317 mov LASTPHASE,A; 318 mov SCSISIGO,A; 319 320 cmp ALLZEROS,A je p_dataout; 321 cmp A,P_DATAIN je p_datain; 322 cmp A,P_COMMAND je p_command; 323 cmp A,P_MESGOUT je p_mesgout; 324 cmp A,P_STATUS je p_status; 325 cmp A,P_MESGIN je p_mesgin; 326 327 mvi INTSTAT,BAD_PHASE; /* unknown phase - signal driver */ 328 jmp ITloop; /* Try reading the bus again. */ 329 330await_busfree: 331 and SIMODE1, ~ENBUSFREE; |
| 331 mov NONE, SCSIDATL; /* Ack the last byte */ | |
| 332 call clear_target_state; | 332 call clear_target_state; |
| 333 mov NONE, SCSIDATL; /* Ack the last byte */ |
|
| 333 test SSTAT1,REQINIT|BUSFREE jz .; 334 test SSTAT1, BUSFREE jnz poll_for_work; 335 mvi INTSTAT, BAD_PHASE; 336 337clear_target_state: 338 clr DFCNTRL; 339 clr SCSIRATE; /* 340 * We don't know the target we will --- 192 unchanged lines hidden (view full) --- 533 * ATN must be dropped *at least* 90ns before we ack the last byte, so 534 * the code is aranged to execute two instructions before the byte is 535 * transferred to give a good margin of safety 536 * 537 * Keep an eye out for a phase change, in case the target issues 538 * a MESSAGE REJECT. 539 */ 540p_mesgout_loop: | 334 test SSTAT1,REQINIT|BUSFREE jz .; 335 test SSTAT1, BUSFREE jnz poll_for_work; 336 mvi INTSTAT, BAD_PHASE; 337 338clear_target_state: 339 clr DFCNTRL; 340 clr SCSIRATE; /* 341 * We don't know the target we will --- 192 unchanged lines hidden (view full) --- 534 * ATN must be dropped *at least* 90ns before we ack the last byte, so 535 * the code is aranged to execute two instructions before the byte is 536 * transferred to give a good margin of safety 537 * 538 * Keep an eye out for a phase change, in case the target issues 539 * a MESSAGE REJECT. 540 */ 541p_mesgout_loop: |
| 541 test SSTAT1, REQINIT jz p_mesgout_loop; | 542 test SSTAT1, REQINIT jz p_mesgout_loop; 543 test SSTAT1, SCSIPERR jnz p_mesgout_loop; |
| 542 and LASTPHASE, PHASE_MASK, SCSISIGI; 543 cmp LASTPHASE, P_MESGOUT jne p_mesgout_done; 544/* 545 * If the next bus phase after ATN drops is a message out, it means 546 * that the target is requesting that the last message(s) be resent. 547 */ 548p_mesgout_dropatn: 549 cmp DINDEX,1 jne p_mesgout_testretry;/* last byte? */ --- 225 unchanged lines hidden (view full) --- 775 * and non-tagged transactions since the SCB may exist in any slot. 776 * If we're not using SCB paging, we can use the tag as the direct 777 * index to the SCB. 778 */ 779snoop_tag: 780 mov NONE,SCSIDATL; /* ACK Identify MSG */ 781snoop_tag_loop: 782 test SSTAT1,REQINIT jz snoop_tag_loop; | 544 and LASTPHASE, PHASE_MASK, SCSISIGI; 545 cmp LASTPHASE, P_MESGOUT jne p_mesgout_done; 546/* 547 * If the next bus phase after ATN drops is a message out, it means 548 * that the target is requesting that the last message(s) be resent. 549 */ 550p_mesgout_dropatn: 551 cmp DINDEX,1 jne p_mesgout_testretry;/* last byte? */ --- 225 unchanged lines hidden (view full) --- 777 * and non-tagged transactions since the SCB may exist in any slot. 778 * If we're not using SCB paging, we can use the tag as the direct 779 * index to the SCB. 780 */ 781snoop_tag: 782 mov NONE,SCSIDATL; /* ACK Identify MSG */ 783snoop_tag_loop: 784 test SSTAT1,REQINIT jz snoop_tag_loop; |
| 785 test SSTAT1, SCSIPERR jnz snoop_tag_loop; |
|
| 783 and LASTPHASE, PHASE_MASK, SCSISIGI; 784 cmp LASTPHASE, P_MESGIN jne not_found; 785 cmp SCSIBUSL,MSG_SIMPLE_Q_TAG jne not_found; 786get_tag: 787 or SEQ_FLAGS, TAGGED_SCB; 788 mvi ARG_1 call inb_next; /* tag value */ 789/* 790 * See if the tag is in range. The tag is < SCBCOUNT if we add --- 360 unchanged lines hidden --- | 786 and LASTPHASE, PHASE_MASK, SCSISIGI; 787 cmp LASTPHASE, P_MESGIN jne not_found; 788 cmp SCSIBUSL,MSG_SIMPLE_Q_TAG jne not_found; 789get_tag: 790 or SEQ_FLAGS, TAGGED_SCB; 791 mvi ARG_1 call inb_next; /* tag value */ 792/* 793 * See if the tag is in range. The tag is < SCBCOUNT if we add --- 360 unchanged lines hidden --- |