| aic7xxx.seq (19906) | aic7xxx.seq (19921) |
|---|---|
| 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, --- 25 unchanged lines hidden (view full) --- 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 *-M************************************************************************/ 41 | 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, --- 25 unchanged lines hidden (view full) --- 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 *-M************************************************************************/ 41 |
| 42VERSION AIC7XXX_SEQ_VER "$Id: aic7xxx.seq,v 1.49 1996/11/16 01:07:34 gibbs Exp $" | 42VERSION AIC7XXX_SEQ_VER "$Id: aic7xxx.seq,v 1.50 1996/11/21 06:18:33 gibbs Exp $" |
| 43 44#if defined(__NetBSD__) 45#include "../../../../dev/ic/aic7xxxreg.h" 46#include "../../../../scsi/scsi_message.h" 47#elif defined(__FreeBSD__) 48#include "../../dev/aic7xxx/aic7xxx_reg.h" 49#include "../../scsi/scsi_message.h" 50#endif --- 26 unchanged lines hidden (view full) --- 77 78/* 79 * We assume that the kernel driver may reset us at any time, even in the 80 * middle of a DMA, so clear DFCNTRL too. 81 */ 82reset: 83 clr DFCNTRL 84 clr SCSISIGO /* De-assert BSY */ | 43 44#if defined(__NetBSD__) 45#include "../../../../dev/ic/aic7xxxreg.h" 46#include "../../../../scsi/scsi_message.h" 47#elif defined(__FreeBSD__) 48#include "../../dev/aic7xxx/aic7xxx_reg.h" 49#include "../../scsi/scsi_message.h" 50#endif --- 26 unchanged lines hidden (view full) --- 77 78/* 79 * We assume that the kernel driver may reset us at any time, even in the 80 * middle of a DMA, so clear DFCNTRL too. 81 */ 82reset: 83 clr DFCNTRL 84 clr SCSISIGO /* De-assert BSY */ |
| 85/* 86 * We jump to start after every bus free. 87 */ | 85 86p_busfree: 87 mvi LASTPHASE, P_BUSFREE 88 |
| 88start: 89 and FLAGS,0x07 /* clear target specific flags */ 90 mvi SCSISEQ,ENRSELI /* Always allow reselection */ 91 clr SCSIRATE /* 92 * We don't know the target we will 93 * connect to, so default to narrow 94 * transfers to avoid parity problems. 95 */ --- 45 unchanged lines hidden (view full) --- 141 mvi DMAPARAMS, 0xd /* HDMAEN|DIRECTION|FIFORESET */ 142 mov CUR_SCBID call dma_scb 143 144/* 145 * See if there is not already an active SCB for this target. This code 146 * locks out on a per target basis instead of target/lun. Although this 147 * is not ideal for devices that have multiple luns active at the same 148 * time, it is faster than looping through all SCB's looking for active | 89start: 90 and FLAGS,0x07 /* clear target specific flags */ 91 mvi SCSISEQ,ENRSELI /* Always allow reselection */ 92 clr SCSIRATE /* 93 * We don't know the target we will 94 * connect to, so default to narrow 95 * transfers to avoid parity problems. 96 */ --- 45 unchanged lines hidden (view full) --- 142 mvi DMAPARAMS, 0xd /* HDMAEN|DIRECTION|FIFORESET */ 143 mov CUR_SCBID call dma_scb 144 145/* 146 * See if there is not already an active SCB for this target. This code 147 * locks out on a per target basis instead of target/lun. Although this 148 * is not ideal for devices that have multiple luns active at the same 149 * time, it is faster than looping through all SCB's looking for active |
| 149 * commands. We also don't have enough spare SCB space for to store the | 150 * commands. We also don't have enough spare SCB space for us to store the |
| 150 * SCBID of the currently busy transaction for each target/lun making it 151 * impossible to link up the SCBs. 152 */ 153test_busy: 154 test SCB_CONTROL, TAG_ENB jnz start_scb 155 mov SAVED_SCBPTR, SCBPTR 156 mov SCB_TCL call index_untagged_scb 157 mov ARG_1, SINDIR /* --- 154 unchanged lines hidden (view full) --- 312 mov SXFRCTL0,DINDEX 313 314 mvi SCSISEQ,ENAUTOATNP /* 315 * ATN on parity errors 316 * for "in" phases 317 */ 318 mvi CLRSINT1,CLRBUSFREE 319 mvi CLRSINT0,0x60 /* CLRSELDI|CLRSELDO */ | 151 * SCBID of the currently busy transaction for each target/lun making it 152 * impossible to link up the SCBs. 153 */ 154test_busy: 155 test SCB_CONTROL, TAG_ENB jnz start_scb 156 mov SAVED_SCBPTR, SCBPTR 157 mov SCB_TCL call index_untagged_scb 158 mov ARG_1, SINDIR /* --- 154 unchanged lines hidden (view full) --- 313 mov SXFRCTL0,DINDEX 314 315 mvi SCSISEQ,ENAUTOATNP /* 316 * ATN on parity errors 317 * for "in" phases 318 */ 319 mvi CLRSINT1,CLRBUSFREE 320 mvi CLRSINT0,0x60 /* CLRSELDI|CLRSELDO */ |
| 321 or SIMODE1, ENBUSFREE /* 322 * We aren't expecting a 323 * bus free, so interrupt 324 * the kernel driver if it 325 * happens. 326 */ |
|
| 320/* 321 * Main loop for information transfer phases. If BSY is false, then 322 * we have a bus free condition, expected or not. Otherwise, wait 323 * for the target to assert REQ before checking MSG, C/D and I/O 324 * for the bus phase. 325 * 326 */ 327ITloop: --- 67 unchanged lines hidden (view full) --- 395 test SG_COUNT, 0xff jnz data_phase_inbounds 396/* 397 * Turn on 'Bit Bucket' mode, set the transfer count to 398 * 16meg and let the target run until it changes phase. 399 * When the transfer completes, notify the host that we 400 * had an overrun. 401 */ 402 or SXFRCTL1,BITBUCKET | 327/* 328 * Main loop for information transfer phases. If BSY is false, then 329 * we have a bus free condition, expected or not. Otherwise, wait 330 * for the target to assert REQ before checking MSG, C/D and I/O 331 * for the bus phase. 332 * 333 */ 334ITloop: --- 67 unchanged lines hidden (view full) --- 402 test SG_COUNT, 0xff jnz data_phase_inbounds 403/* 404 * Turn on 'Bit Bucket' mode, set the transfer count to 405 * 16meg and let the target run until it changes phase. 406 * When the transfer completes, notify the host that we 407 * had an overrun. 408 */ 409 or SXFRCTL1,BITBUCKET |
| 410 and DMAPARAMS, 0xf7 /* Turn off HDMAEN */ |
|
| 403 mvi STCNT0,0xff 404 mvi STCNT1,0xff 405 mvi STCNT2,0xff 406 407data_phase_inbounds: 408/* If we are the last SG block, ensure wideodd is off. */ 409 cmp SG_COUNT,0x01 jne data_phase_wideodd 410 and DMAPARAMS, 0xbf /* Turn off WIDEODD */ --- 120 unchanged lines hidden (view full) --- 531/* 532 * When target asks for a byte, drop ATN if it's the last one in 533 * the message. Otherwise, keep going until the message is exhausted. 534 * 535 * Keep an eye out for a phase change, in case the target issues 536 * a MESSAGE REJECT. 537 */ 538p_mesgout_loop: | 411 mvi STCNT0,0xff 412 mvi STCNT1,0xff 413 mvi STCNT2,0xff 414 415data_phase_inbounds: 416/* If we are the last SG block, ensure wideodd is off. */ 417 cmp SG_COUNT,0x01 jne data_phase_wideodd 418 and DMAPARAMS, 0xbf /* Turn off WIDEODD */ --- 120 unchanged lines hidden (view full) --- 539/* 540 * When target asks for a byte, drop ATN if it's the last one in 541 * the message. Otherwise, keep going until the message is exhausted. 542 * 543 * Keep an eye out for a phase change, in case the target issues 544 * a MESSAGE REJECT. 545 */ 546p_mesgout_loop: |
| 539 test SSTAT1,BUSFREE jnz p_mesgout_done | |
| 540 test SSTAT0,SPIORDY jz p_mesgout_loop 541 test SSTAT1,PHASEMIS jnz p_mesgout_done 542/* 543 * If the next bus phase after ATN drops is a message out, it means 544 * that the target is requesting that the last message(s) be resent. 545 */ | 547 test SSTAT0,SPIORDY jz p_mesgout_loop 548 test SSTAT1,PHASEMIS jnz p_mesgout_done 549/* 550 * If the next bus phase after ATN drops is a message out, it means 551 * that the target is requesting that the last message(s) be resent. 552 */ |
| 553p_mesgout_dropatn: 554 cmp DINDEX,1 jne p_mesgout_testretry /* last byte? */ 555 mvi CLRSINT1,CLRATNO /* drop ATN */ 556p_mesgout_testretry: |
|
| 546 test DINDEX,0xff jnz p_mesgout_outb 547 or SCSISIGO,ATNO /* turn on ATN for the retry */ 548 jmp p_mesgout_start 549p_mesgout_outb: | 557 test DINDEX,0xff jnz p_mesgout_outb 558 or SCSISIGO,ATNO /* turn on ATN for the retry */ 559 jmp p_mesgout_start 560p_mesgout_outb: |
| 550 cmp DINDEX,1 jne p_mesgout_outb2 /* last byte? */ 551 mvi CLRSINT1,CLRATNO /* drop ATN */ 552p_mesgout_outb2: | |
| 553 dec DINDEX 554 mvi CLRSINT0, CLRSPIORDY 555 mov SCSIDATL,SINDIR 556 jmp p_mesgout_loop 557 558p_mesgout_done: 559 mvi CLRSINT1,CLRATNO /* Be sure to turn ATNO off */ 560 clr MSG_LEN /* no active msg */ --- 44 unchanged lines hidden (view full) --- 605 * If the kernel driver does not wish to request sense, it need only clear 606 * RETURN_1, and the command is allowed to complete normally. We don't bother 607 * to post to the QOUTFIFO in the error cases since it would require extra 608 * work in the kernel driver to ensure that the entry was removed before the 609 * command complete code tried processing it. 610 */ 611 612/* | 561 dec DINDEX 562 mvi CLRSINT0, CLRSPIORDY 563 mov SCSIDATL,SINDIR 564 jmp p_mesgout_loop 565 566p_mesgout_done: 567 mvi CLRSINT1,CLRATNO /* Be sure to turn ATNO off */ 568 clr MSG_LEN /* no active msg */ --- 44 unchanged lines hidden (view full) --- 613 * If the kernel driver does not wish to request sense, it need only clear 614 * RETURN_1, and the command is allowed to complete normally. We don't bother 615 * to post to the QOUTFIFO in the error cases since it would require extra 616 * work in the kernel driver to ensure that the entry was removed before the 617 * command complete code tried processing it. 618 */ 619 620/* |
| 621 * We expect to go to bus free after this message. 622 */ 623 and SIMODE1, 0xf7 /* ~ENBUSFREE */ 624/* |
|
| 613 * First check for residuals 614 */ 615 test SCB_RESID_SGCNT,0xff jnz upload_scb 616 test SCB_TARGET_STATUS,0xff jz status_ok /* Good Status? */ 617upload_scb: 618 mvi DMAPARAMS, 0x9 /* HDMAEN | FIFORESET*/ 619 mov SCB_TAG call dma_scb 620check_status: 621 test SCB_TARGET_STATUS,0xff jz status_ok /* Just a residual? */ 622 mvi INTSTAT,BAD_STATUS /* let driver know */ 623 cmp RETURN_1, SEND_SENSE jne status_ok 624 /* This SCB becomes the next to execute as it will retrieve sense */ 625 mov SCB_LINKED_NEXT, SCB_TAG 626 jmp dma_next_scb 627 628status_ok: 629/* First, mark this target as free. */ | 625 * First check for residuals 626 */ 627 test SCB_RESID_SGCNT,0xff jnz upload_scb 628 test SCB_TARGET_STATUS,0xff jz status_ok /* Good Status? */ 629upload_scb: 630 mvi DMAPARAMS, 0x9 /* HDMAEN | FIFORESET*/ 631 mov SCB_TAG call dma_scb 632check_status: 633 test SCB_TARGET_STATUS,0xff jz status_ok /* Just a residual? */ 634 mvi INTSTAT,BAD_STATUS /* let driver know */ 635 cmp RETURN_1, SEND_SENSE jne status_ok 636 /* This SCB becomes the next to execute as it will retrieve sense */ 637 mov SCB_LINKED_NEXT, SCB_TAG 638 jmp dma_next_scb 639 640status_ok: 641/* First, mark this target as free. */ |
| 630 test SCB_CONTROL,TAG_ENB jnz test_immediate /* | 642 test SCB_CONTROL,TAG_ENB jnz complete /* |
| 631 * Tagged commands 632 * don't busy the 633 * target. 634 */ 635 mov SAVED_SCBPTR, SCBPTR 636 mov SAVED_LINKPTR, SCB_LINKED_NEXT 637 mov SCB_TCL call index_untagged_scb 638 mov DINDIR, SAVED_LINKPTR 639 mov SCBPTR, SAVED_SCBPTR 640 | 643 * Tagged commands 644 * don't busy the 645 * target. 646 */ 647 mov SAVED_SCBPTR, SCBPTR 648 mov SAVED_LINKPTR, SCB_LINKED_NEXT 649 mov SCB_TCL call index_untagged_scb 650 mov DINDIR, SAVED_LINKPTR 651 mov SCBPTR, SAVED_SCBPTR 652 |
| 641test_immediate: 642 test SCB_CMDLEN,0xff jnz complete /* Immediate message complete */ 643/* 644 * Pause the sequencer until the driver gets around to handling the command 645 * complete. This is so that any action that might require carefull timing 646 * with the completion of this command can occur. 647 */ 648 mvi INTSTAT,IMMEDDONE 649 jmp dma_next_scb | |
| 650complete: 651 test FLAGS, PAGESCBS jz complete_post 652 mov A, QFULLCNT 653complete_poll: 654 cmp QOUTQCNT, A je complete_poll 655 mvi SEQCTL,0x50 /* PAUSEDIS|FASTMODE */ 656 inc QOUTQCNT 657complete_post: 658 /* Post the SCB and issue an interrupt */ 659 mov QOUTFIFO,SCB_TAG 660 mvi SEQCTL,0x10 /* FASTMODE */ 661 mvi INTSTAT,CMDCMPLT 662 663dma_next_scb: | 653complete: 654 test FLAGS, PAGESCBS jz complete_post 655 mov A, QFULLCNT 656complete_poll: 657 cmp QOUTQCNT, A je complete_poll 658 mvi SEQCTL,0x50 /* PAUSEDIS|FASTMODE */ 659 inc QOUTQCNT 660complete_post: 661 /* Post the SCB and issue an interrupt */ 662 mov QOUTFIFO,SCB_TAG 663 mvi SEQCTL,0x10 /* FASTMODE */ 664 mvi INTSTAT,CMDCMPLT 665 666dma_next_scb: |
| 664 cmp SCB_LINKED_NEXT, SCB_LIST_NULL je mesgin_done | 667 cmp SCB_LINKED_NEXT, SCB_LIST_NULL je add_to_free_list |
| 665 test FLAGS, PAGESCBS jnz dma_next_scb2 666 /* Only DMA on top of ourselves if we are the SCB to download */ 667 mov A, SCB_LINKED_NEXT 668 cmp SCB_TAG, A je dma_next_scb2 669 mov SCBPTR, A 670 jmp add_to_waiting_list 671dma_next_scb2: 672 mvi DMAPARAMS, 0xd /* HDMAEN|DIRECTION|FIFORESET */ 673 mov SCB_LINKED_NEXT call dma_scb 674add_to_waiting_list: 675 mov SCB_NEXT,WAITING_SCBH 676 mov WAITING_SCBH, SCBPTR | 668 test FLAGS, PAGESCBS jnz dma_next_scb2 669 /* Only DMA on top of ourselves if we are the SCB to download */ 670 mov A, SCB_LINKED_NEXT 671 cmp SCB_TAG, A je dma_next_scb2 672 mov SCBPTR, A 673 jmp add_to_waiting_list 674dma_next_scb2: 675 mvi DMAPARAMS, 0xd /* HDMAEN|DIRECTION|FIFORESET */ 676 mov SCB_LINKED_NEXT call dma_scb 677add_to_waiting_list: 678 mov SCB_NEXT,WAITING_SCBH 679 mov WAITING_SCBH, SCBPTR |
| 677 or FLAGS, SCB_LISTED | |
| 678 jmp mesgin_done | 680 jmp mesgin_done |
| 681add_to_free_list: 682 call add_scb_to_free_list 683 jmp mesgin_done |
|
| 679 680/* 681 * Is it an extended message? Copy the message to our message buffer and 682 * notify the host. The host will tell us whether to reject this message, 683 * respond to it with the message that the host placed in our message buffer, 684 * or simply to do nothing. 685 */ 686mesgin_extended: --- 14 unchanged lines hidden (view full) --- 701 or SCSISIGO,ATNO /* turn on ATNO */ 702 jmp mesgin_done 703 704/* 705 * Is it a disconnect message? Set a flag in the SCB to remind us 706 * and await the bus going free. 707 */ 708mesgin_disconnect: | 684 685/* 686 * Is it an extended message? Copy the message to our message buffer and 687 * notify the host. The host will tell us whether to reject this message, 688 * respond to it with the message that the host placed in our message buffer, 689 * or simply to do nothing. 690 */ 691mesgin_extended: --- 14 unchanged lines hidden (view full) --- 706 or SCSISIGO,ATNO /* turn on ATNO */ 707 jmp mesgin_done 708 709/* 710 * Is it a disconnect message? Set a flag in the SCB to remind us 711 * and await the bus going free. 712 */ 713mesgin_disconnect: |
| 714 and SIMODE1, 0xf7 /* ~ENBUSFREE */ |
|
| 709 or SCB_CONTROL,DISCONNECTED 710 test FLAGS, PAGESCBS jz mesgin_done 711 call add_scb_to_disc_list | 715 or SCB_CONTROL,DISCONNECTED 716 test FLAGS, PAGESCBS jz mesgin_done 717 call add_scb_to_disc_list |
| 712 or FLAGS, SCB_LISTED | |
| 713 jmp mesgin_done 714 715/* 716 * Save data pointers message: 717 * Copying RAM values back to SCB, for Save Data Pointers message, but 718 * only if we've actually been into a data phase to change them. This 719 * protects against bogus data in scratch ram and the residual counts 720 * since they are only initialized when we go into data_in or data_out. --- 46 unchanged lines hidden (view full) --- 767 * If we get one, we use the tag returned to switch to find the proper 768 * SCB. With SCB paging, this requires using findSCB for both tagged 769 * and non-tagged transactions since the SCB may exist in any slot. 770 * If we're not using SCB paging, we can use the tag as the direct 771 * index to the SCB. 772 */ 773 mvi ARG_1,SCB_LIST_NULL /* Default to no-tag */ 774snoop_tag_loop: | 718 jmp mesgin_done 719 720/* 721 * Save data pointers message: 722 * Copying RAM values back to SCB, for Save Data Pointers message, but 723 * only if we've actually been into a data phase to change them. This 724 * protects against bogus data in scratch ram and the residual counts 725 * since they are only initialized when we go into data_in or data_out. --- 46 unchanged lines hidden (view full) --- 772 * If we get one, we use the tag returned to switch to find the proper 773 * SCB. With SCB paging, this requires using findSCB for both tagged 774 * and non-tagged transactions since the SCB may exist in any slot. 775 * If we're not using SCB paging, we can use the tag as the direct 776 * index to the SCB. 777 */ 778 mvi ARG_1,SCB_LIST_NULL /* Default to no-tag */ 779snoop_tag_loop: |
| 775 test SSTAT1,BUSFREE jnz use_findSCB 776 test SSTAT1,REQINIT jz snoop_tag_loop | 780 test SSTAT0,SPIORDY jz snoop_tag_loop |
| 777 test SSTAT1,PHASEMIS jnz use_findSCB 778 mvi A call inb_first 779 cmp A,MSG_SIMPLE_Q_TAG jne use_findSCB 780get_tag: 781 or FLAGS, TAGGED_SCB 782 mvi ARG_1 call inb_next /* tag value */ 783/* 784 * See if the tag is in range. The tag is < SCBCOUNT if we add --- 44 unchanged lines hidden (view full) --- 829 mvi INTSTAT, REJECT_MSG 830 jmp mesgin_done 831 832/* 833 * [ ADD MORE MESSAGE HANDLING HERE ] 834 */ 835 836/* | 781 test SSTAT1,PHASEMIS jnz use_findSCB 782 mvi A call inb_first 783 cmp A,MSG_SIMPLE_Q_TAG jne use_findSCB 784get_tag: 785 or FLAGS, TAGGED_SCB 786 mvi ARG_1 call inb_next /* tag value */ 787/* 788 * See if the tag is in range. The tag is < SCBCOUNT if we add --- 44 unchanged lines hidden (view full) --- 833 mvi INTSTAT, REJECT_MSG 834 jmp mesgin_done 835 836/* 837 * [ ADD MORE MESSAGE HANDLING HERE ] 838 */ 839 840/* |
| 837 * Bus free phase. It might be useful to interrupt the device 838 * driver if we aren't expecting this. 839 */ 840p_busfree: 841 mvi LASTPHASE, P_BUSFREE 842 843/* 844 * if this is an immediate command, perform a psuedo command complete to 845 * notify the driver. 846 */ 847 test SCB_CMDLEN,0xff jz status_ok 848 test FLAGS, SCB_LISTED jnz start 849 /* 850 * This SCB didn't disconnect or have a command complete, 851 * so put it on the free queue. It was probably the 852 * result of an abort of some sort. This prevents us 853 * from "leaking" SCBs. 854 */ 855 call add_scb_to_free_list 856 jmp start 857 858/* | |
| 859 * Locking the driver out, build a one-byte message passed in SINDEX 860 * if there is no active message already. SINDEX is returned intact. 861 */ 862mk_mesg: 863 mvi SEQCTL,0x50 /* PAUSEDIS|FASTMODE */ 864 test MSG_LEN,0xff jz mk_mesg1 /* Should always succeed */ 865 866 /* --- 301 unchanged lines hidden --- | 841 * Locking the driver out, build a one-byte message passed in SINDEX 842 * if there is no active message already. SINDEX is returned intact. 843 */ 844mk_mesg: 845 mvi SEQCTL,0x50 /* PAUSEDIS|FASTMODE */ 846 test MSG_LEN,0xff jz mk_mesg1 /* Should always succeed */ 847 848 /* --- 301 unchanged lines hidden --- |