ncr.c revision 14453
1/************************************************************************** 2** 3** $Id: ncr.c,v 1.64 1996/02/19 00:03:50 se Exp $ 4** 5** Device driver for the NCR 53C810 PCI-SCSI-Controller. 6** 7** FreeBSD / NetBSD 8** 9**------------------------------------------------------------------------- 10** 11** Written for 386bsd and FreeBSD by 12** Wolfgang Stanglmeier <wolf@cologne.de> 13** Stefan Esser <se@mi.Uni-Koeln.de> 14** 15** Ported to NetBSD by 16** Charles M. Hannum <mycroft@gnu.ai.mit.edu> 17** 18**------------------------------------------------------------------------- 19** 20** Copyright (c) 1994 Wolfgang Stanglmeier. All rights reserved. 21** 22** Redistribution and use in source and binary forms, with or without 23** modification, are permitted provided that the following conditions 24** are met: 25** 1. Redistributions of source code must retain the above copyright 26** notice, this list of conditions and the following disclaimer. 27** 2. Redistributions in binary form must reproduce the above copyright 28** notice, this list of conditions and the following disclaimer in the 29** documentation and/or other materials provided with the distribution. 30** 3. The name of the author may not be used to endorse or promote products 31** derived from this software without specific prior written permission. 32** 33** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 34** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 35** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 36** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 37** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 38** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 39** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 40** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 41** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 42** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 43** 44*************************************************************************** 45*/ 46 47#define NCR_DATE "pl23 95/09/07" 48 49#define NCR_VERSION (2) 50#define MAX_UNITS (16) 51 52#define NCR_GETCC_WITHMSG 53 54/*========================================================== 55** 56** Configuration and Debugging 57** 58** May be overwritten in <arch/conf/xxxx> 59** 60**========================================================== 61*/ 62 63/* 64** SCSI address of this device. 65** The boot routines should have set it. 66** If not, use this. 67*/ 68 69#ifndef SCSI_NCR_MYADDR 70#define SCSI_NCR_MYADDR (7) 71#endif /* SCSI_NCR_MYADDR */ 72 73/* 74** The maximal synchronous frequency in kHz. 75** (0=asynchronous) 76*/ 77 78#ifndef SCSI_NCR_MAX_SYNC 79#define SCSI_NCR_MAX_SYNC (10000) 80#endif /* SCSI_NCR_MAX_SYNC */ 81 82/* 83** The maximal bus with (in log2 byte) 84** (0=8 bit, 1=16 bit) 85*/ 86 87#ifndef SCSI_NCR_MAX_WIDE 88#define SCSI_NCR_MAX_WIDE (1) 89#endif /* SCSI_NCR_MAX_WIDE */ 90 91/* 92** The maximum number of tags per logic unit. 93** Used only for disk devices that support tags. 94*/ 95 96#ifndef SCSI_NCR_DFLT_TAGS 97#define SCSI_NCR_DFLT_TAGS (4) 98#endif /* SCSI_NCR_DFLT_TAGS */ 99 100/*========================================================== 101** 102** Configuration and Debugging 103** 104**========================================================== 105*/ 106 107/* 108** Number of targets supported by the driver. 109** n permits target numbers 0..n-1. 110** Default is 7, meaning targets #0..#6. 111** #7 .. is myself. 112*/ 113 114#define MAX_TARGET (16) 115 116/* 117** Number of logic units supported by the driver. 118** n enables logic unit numbers 0..n-1. 119** The common SCSI devices require only 120** one lun, so take 1 as the default. 121*/ 122 123#define MAX_LUN (8) 124 125/* 126** The maximum number of jobs scheduled for starting. 127** There should be one slot per target, and one slot 128** for each tag of each target in use. 129** The calculation below is actually quite silly ... 130*/ 131 132#define MAX_START (MAX_TARGET + 7 * SCSI_NCR_DFLT_TAGS) 133 134/* 135** The maximum number of segments a transfer is split into. 136*/ 137 138#define MAX_SCATTER (33) 139 140/* 141** The maximum transfer length (should be >= 64k). 142** MUST NOT be greater than (MAX_SCATTER-1) * NBPG. 143*/ 144 145#define MAX_SIZE ((MAX_SCATTER-1) * (long) NBPG) 146 147/* 148** other 149*/ 150 151#define NCR_SNOOP_TIMEOUT (1000000) 152 153/*========================================================== 154** 155** Include files 156** 157**========================================================== 158*/ 159 160#ifdef __NetBSD__ 161#ifdef _KERNEL 162#define KERNEL 163#endif 164#endif 165#include <stddef.h> 166 167#include <sys/types.h> 168#include <sys/param.h> 169#include <sys/time.h> 170#include <sys/proc.h> 171 172#ifdef KERNEL 173#include <sys/systm.h> 174#include <sys/malloc.h> 175#include <sys/buf.h> 176#include <sys/kernel.h> 177#include <sys/sysctl.h> 178#ifndef __NetBSD__ 179#include <machine/clock.h> 180#include <machine/cpu.h> /* bootverbose */ 181#else 182#define bootverbose 1 183#endif 184#include <vm/vm.h> 185#include <vm/vm_param.h> 186#include <vm/pmap.h> 187#include <vm/vm_extern.h> 188#endif /* KERNEL */ 189 190 191#ifndef __NetBSD__ 192#include <sys/devconf.h> 193#include <pci/pcivar.h> 194#include <pci/pcireg.h> 195#include <pci/ncrreg.h> 196#else 197#include <sys/device.h> 198#include <dev/pci/ncr_reg.h> 199#include <dev/pci/pcivar.h> 200#include <dev/pci/pcireg.h> 201#define DELAY(x) delay(x) 202#endif /* __NetBSD */ 203 204#include <scsi/scsi_all.h> 205#include <scsi/scsiconf.h> 206#ifndef __NetBSD__ 207#include <machine/clock.h> 208#endif /* __NetBSD */ 209 210 211/*========================================================== 212** 213** Debugging tags 214** 215**========================================================== 216*/ 217 218#define DEBUG_ALLOC (0x0001) 219#define DEBUG_PHASE (0x0002) 220#define DEBUG_POLL (0x0004) 221#define DEBUG_QUEUE (0x0008) 222#define DEBUG_RESULT (0x0010) 223#define DEBUG_SCATTER (0x0020) 224#define DEBUG_SCRIPT (0x0040) 225#define DEBUG_TINY (0x0080) 226#define DEBUG_TIMING (0x0100) 227#define DEBUG_NEGO (0x0200) 228#define DEBUG_TAGS (0x0400) 229#define DEBUG_FREEZE (0x0800) 230#define DEBUG_RESTART (0x1000) 231 232/* 233** Enable/Disable debug messages. 234** Can be changed at runtime too. 235*/ 236 237#ifdef SCSI_DEBUG_FLAGS 238 #define DEBUG_FLAGS ncr_debug 239#else /* SCSI_DEBUG_FLAGS */ 240 #define SCSI_DEBUG_FLAGS 0 241 #define DEBUG_FLAGS 0 242#endif /* SCSI_DEBUG_FLAGS */ 243 244 245 246/*========================================================== 247** 248** assert () 249** 250**========================================================== 251** 252** modified copy from 386bsd:/usr/include/sys/assert.h 253** 254**---------------------------------------------------------- 255*/ 256 257#define assert(expression) { \ 258 if (!(expression)) { \ 259 (void)printf(\ 260 "assertion \"%s\" failed: file \"%s\", line %d\n", \ 261 #expression, \ 262 __FILE__, __LINE__); \ 263 } \ 264} 265 266/*========================================================== 267** 268** Access to the controller chip. 269** 270**========================================================== 271*/ 272 273#ifdef NCR_IOMAPPED 274 275#define INB(r) inb (np->port + offsetof(struct ncr_reg, r)) 276#define INW(r) inw (np->port + offsetof(struct ncr_reg, r)) 277#define INL(r) inl (np->port + offsetof(struct ncr_reg, r)) 278 279#define OUTB(r, val) outb (np->port+offsetof(struct ncr_reg,r),(val)) 280#define OUTW(r, val) outw (np->port+offsetof(struct ncr_reg,r),(val)) 281#define OUTL(r, val) outl (np->port+offsetof(struct ncr_reg,r),(val)) 282 283#else 284 285#define INB(r) (np->reg->r) 286#define INW(r) (np->reg->r) 287#define INL(r) (np->reg->r) 288 289#define OUTB(r, val) np->reg->r = val 290#define OUTW(r, val) np->reg->r = val 291#define OUTL(r, val) np->reg->r = val 292 293#endif 294 295/*========================================================== 296** 297** Command control block states. 298** 299**========================================================== 300*/ 301 302#define HS_IDLE (0) 303#define HS_BUSY (1) 304#define HS_NEGOTIATE (2) /* sync/wide data transfer*/ 305#define HS_DISCONNECT (3) /* Disconnected by target */ 306 307#define HS_COMPLETE (4) 308#define HS_SEL_TIMEOUT (5) /* Selection timeout */ 309#define HS_RESET (6) /* SCSI reset */ 310#define HS_ABORTED (7) /* Transfer aborted */ 311#define HS_TIMEOUT (8) /* Software timeout */ 312#define HS_FAIL (9) /* SCSI or PCI bus errors */ 313#define HS_UNEXPECTED (10) /* Unexpected disconnect */ 314 315#define HS_DONEMASK (0xfc) 316 317/*========================================================== 318** 319** Software Interrupt Codes 320** 321**========================================================== 322*/ 323 324#define SIR_SENSE_RESTART (1) 325#define SIR_SENSE_FAILED (2) 326#define SIR_STALL_RESTART (3) 327#define SIR_STALL_QUEUE (4) 328#define SIR_NEGO_SYNC (5) 329#define SIR_NEGO_WIDE (6) 330#define SIR_NEGO_FAILED (7) 331#define SIR_NEGO_PROTO (8) 332#define SIR_REJECT_RECEIVED (9) 333#define SIR_REJECT_SENT (10) 334#define SIR_IGN_RESIDUE (11) 335#define SIR_MISSING_SAVE (12) 336#define SIR_MAX (12) 337 338/*========================================================== 339** 340** Extended error codes. 341** xerr_status field of struct ccb. 342** 343**========================================================== 344*/ 345 346#define XE_OK (0) 347#define XE_EXTRA_DATA (1) /* unexpected data phase */ 348#define XE_BAD_PHASE (2) /* illegal phase (4/5) */ 349 350/*========================================================== 351** 352** Negotiation status. 353** nego_status field of struct ccb. 354** 355**========================================================== 356*/ 357 358#define NS_SYNC (1) 359#define NS_WIDE (2) 360 361/*========================================================== 362** 363** "Special features" of targets. 364** quirks field of struct tcb. 365** actualquirks field of struct ccb. 366** 367**========================================================== 368*/ 369 370#define QUIRK_AUTOSAVE (0x01) 371#define QUIRK_NOMSG (0x02) 372#define QUIRK_NOSYNC (0x10) 373#define QUIRK_NOWIDE16 (0x20) 374#define QUIRK_UPDATE (0x80) 375 376/*========================================================== 377** 378** Capability bits in Inquire response byte 7. 379** 380**========================================================== 381*/ 382 383#define INQ7_QUEUE (0x02) 384#define INQ7_SYNC (0x10) 385#define INQ7_WIDE16 (0x20) 386 387/*========================================================== 388** 389** Misc. 390** 391**========================================================== 392*/ 393 394#define CCB_MAGIC (0xf2691ad2) 395#define MAX_TAGS (16) /* hard limit */ 396 397/*========================================================== 398** 399** OS dependencies. 400** 401**========================================================== 402*/ 403 404#ifdef __NetBSD__ 405 #define TIMEOUT (void*) 406#else /*__NetBSD__*/ 407 #define TIMEOUT (timeout_func_t) 408#endif /*__NetBSD__*/ 409#define PRINT_ADDR(xp) sc_print_addr(xp->sc_link) 410 411/*========================================================== 412** 413** Declaration of structs. 414** 415**========================================================== 416*/ 417 418struct tcb; 419struct lcb; 420struct ccb; 421struct ncb; 422struct script; 423 424typedef struct ncb * ncb_p; 425typedef struct tcb * tcb_p; 426typedef struct lcb * lcb_p; 427typedef struct ccb * ccb_p; 428 429struct link { 430 u_long l_cmd; 431 u_long l_paddr; 432}; 433 434struct usrcmd { 435 u_long target; 436 u_long lun; 437 u_long data; 438 u_long cmd; 439}; 440 441#define UC_SETSYNC 10 442#define UC_SETTAGS 11 443#define UC_SETDEBUG 12 444#define UC_SETORDER 13 445#define UC_SETWIDE 14 446#define UC_SETFLAG 15 447 448#define UF_TRACE (0x01) 449 450/*--------------------------------------- 451** 452** Timestamps for profiling 453** 454**--------------------------------------- 455*/ 456 457struct tstamp { 458 struct timeval start; 459 struct timeval end; 460 struct timeval select; 461 struct timeval command; 462 struct timeval data; 463 struct timeval status; 464 struct timeval disconnect; 465 struct timeval reselect; 466}; 467 468/* 469** profiling data (per device) 470*/ 471 472struct profile { 473 u_long num_trans; 474 u_long num_bytes; 475 u_long num_disc; 476 u_long num_break; 477 u_long num_int; 478 u_long num_fly; 479 u_long ms_setup; 480 u_long ms_data; 481 u_long ms_disc; 482 u_long ms_post; 483}; 484 485/*========================================================== 486** 487** Declaration of structs: target control block 488** 489**========================================================== 490*/ 491 492struct tcb { 493 /* 494 ** during reselection the ncr jumps to this point 495 ** with SFBR set to the encoded target number 496 ** with bit 7 set. 497 ** if it's not this target, jump to the next. 498 ** 499 ** JUMP IF (SFBR != #target#) 500 ** @(next tcb) 501 */ 502 503 struct link jump_tcb; 504 505 /* 506 ** load the actual values for the sxfer and the scntl3 507 ** register (sync/wide mode). 508 ** 509 ** SCR_COPY (1); 510 ** @(sval field of this tcb) 511 ** @(sxfer register) 512 ** SCR_COPY (1); 513 ** @(wval field of this tcb) 514 ** @(scntl3 register) 515 */ 516 517 ncrcmd getscr[6]; 518 519 /* 520 ** if next message is "identify" 521 ** then load the message to SFBR, 522 ** else load 0 to SFBR. 523 ** 524 ** CALL 525 ** <RESEL_LUN> 526 */ 527 528 struct link call_lun; 529 530 /* 531 ** now look for the right lun. 532 ** 533 ** JUMP 534 ** @(first ccb of this lun) 535 */ 536 537 struct link jump_lcb; 538 539 /* 540 ** pointer to interrupted getcc ccb 541 */ 542 543 ccb_p hold_cp; 544 545 /* 546 ** statistical data 547 */ 548 549 u_long transfers; 550 u_long bytes; 551 552 /* 553 ** user settable limits for sync transfer 554 ** and tagged commands. 555 */ 556 557 u_char usrsync; 558 u_char usrtags; 559 u_char usrwide; 560 u_char usrflag; 561 562 /* 563 ** negotiation of wide and synch transfer. 564 ** device quirks. 565 */ 566 567/*0*/ u_char minsync; 568/*1*/ u_char sval; 569/*2*/ u_short period; 570/*0*/ u_char maxoffs; 571 572/*1*/ u_char quirks; 573 574/*2*/ u_char widedone; 575/*3*/ u_char wval; 576 /* 577 ** inquire data 578 */ 579#define MAX_INQUIRE 36 580 u_char inqdata[MAX_INQUIRE]; 581 582 /* 583 ** the lcb's of this tcb 584 */ 585 586 lcb_p lp[MAX_LUN]; 587}; 588 589/*========================================================== 590** 591** Declaration of structs: lun control block 592** 593**========================================================== 594*/ 595 596struct lcb { 597 /* 598 ** during reselection the ncr jumps to this point 599 ** with SFBR set to the "Identify" message. 600 ** if it's not this lun, jump to the next. 601 ** 602 ** JUMP IF (SFBR != #lun#) 603 ** @(next lcb of this target) 604 */ 605 606 struct link jump_lcb; 607 608 /* 609 ** if next message is "simple tag", 610 ** then load the tag to SFBR, 611 ** else load 0 to SFBR. 612 ** 613 ** CALL 614 ** <RESEL_TAG> 615 */ 616 617 struct link call_tag; 618 619 /* 620 ** now look for the right ccb. 621 ** 622 ** JUMP 623 ** @(first ccb of this lun) 624 */ 625 626 struct link jump_ccb; 627 628 /* 629 ** start of the ccb chain 630 */ 631 632 ccb_p next_ccb; 633 634 /* 635 ** Control of tagged queueing 636 */ 637 638 u_char reqccbs; 639 u_char actccbs; 640 u_char reqlink; 641 u_char actlink; 642 u_char usetags; 643 u_char lasttag; 644}; 645 646/*========================================================== 647** 648** Declaration of structs: COMMAND control block 649** 650**========================================================== 651** 652** This substructure is copied from the ccb to a 653** global address after selection (or reselection) 654** and copied back before disconnect. 655** 656** These fields are accessible to the script processor. 657** 658**---------------------------------------------------------- 659*/ 660 661struct head { 662 /* 663 ** Execution of a ccb starts at this point. 664 ** It's a jump to the "SELECT" label 665 ** of the script. 666 ** 667 ** After successful selection the script 668 ** processor overwrites it with a jump to 669 ** the IDLE label of the script. 670 */ 671 672 struct link launch; 673 674 /* 675 ** Saved data pointer. 676 ** Points to the position in the script 677 ** responsible for the actual transfer 678 ** of data. 679 ** It's written after reception of a 680 ** "SAVE_DATA_POINTER" message. 681 ** The goalpointer points after 682 ** the last transfer command. 683 */ 684 685 u_long savep; 686 u_long lastp; 687 u_long goalp; 688 689 /* 690 ** The virtual address of the ccb 691 ** containing this header. 692 */ 693 694 ccb_p cp; 695 696 /* 697 ** space for some timestamps to gather 698 ** profiling data about devices and this driver. 699 */ 700 701 struct tstamp stamp; 702 703 /* 704 ** status fields. 705 */ 706 707 u_char status[8]; 708}; 709 710/* 711** The status bytes are used by the host and the script processor. 712** 713** The first four byte are copied to the scratchb register 714** (declared as scr0..scr3 in ncr_reg.h) just after the select/reselect, 715** and copied back just after disconnecting. 716** Inside the script the XX_REG are used. 717** 718** The last four bytes are used inside the script by "COPY" commands. 719** Because source and destination must have the same alignment 720** in a longword, the fields HAVE to be at the choosen offsets. 721** xerr_st (4) 0 (0x34) scratcha 722** sync_st (5) 1 (0x05) sxfer 723** wide_st (7) 3 (0x03) scntl3 724*/ 725 726/* 727** First four bytes (script) 728*/ 729#define QU_REG scr0 730#define HS_REG scr1 731#define HS_PRT nc_scr1 732#define SS_REG scr2 733#define PS_REG scr3 734 735/* 736** First four bytes (host) 737*/ 738#define actualquirks phys.header.status[0] 739#define host_status phys.header.status[1] 740#define scsi_status phys.header.status[2] 741#define parity_status phys.header.status[3] 742 743/* 744** Last four bytes (script) 745*/ 746#define xerr_st header.status[4] /* MUST be ==0 mod 4 */ 747#define sync_st header.status[5] /* MUST be ==1 mod 4 */ 748#define nego_st header.status[6] 749#define wide_st header.status[7] /* MUST be ==3 mod 4 */ 750 751/* 752** Last four bytes (host) 753*/ 754#define xerr_status phys.xerr_st 755#define sync_status phys.sync_st 756#define nego_status phys.nego_st 757#define wide_status phys.wide_st 758 759/*========================================================== 760** 761** Declaration of structs: Data structure block 762** 763**========================================================== 764** 765** During execution of a ccb by the script processor, 766** the DSA (data structure address) register points 767** to this substructure of the ccb. 768** This substructure contains the header with 769** the script-processor-changable data and 770** data blocks for the indirect move commands. 771** 772**---------------------------------------------------------- 773*/ 774 775struct dsb { 776 777 /* 778 ** Header. 779 ** Has to be the first entry, 780 ** because it's jumped to by the 781 ** script processor 782 */ 783 784 struct head header; 785 786 /* 787 ** Table data for Script 788 */ 789 790 struct scr_tblsel select; 791 struct scr_tblmove smsg ; 792 struct scr_tblmove smsg2 ; 793 struct scr_tblmove cmd ; 794 struct scr_tblmove scmd ; 795 struct scr_tblmove sense ; 796 struct scr_tblmove data [MAX_SCATTER]; 797}; 798 799/*========================================================== 800** 801** Declaration of structs: Command control block. 802** 803**========================================================== 804** 805** During execution of a ccb by the script processor, 806** the DSA (data structure address) register points 807** to this substructure of the ccb. 808** This substructure contains the header with 809** the script-processor-changable data and then 810** data blocks for the indirect move commands. 811** 812**---------------------------------------------------------- 813*/ 814 815 816struct ccb { 817 /* 818 ** during reselection the ncr jumps to this point. 819 ** If a "SIMPLE_TAG" message was received, 820 ** then SFBR is set to the tag. 821 ** else SFBR is set to 0 822 ** If looking for another tag, jump to the next ccb. 823 ** 824 ** JUMP IF (SFBR != #TAG#) 825 ** @(next ccb of this lun) 826 */ 827 828 struct link jump_ccb; 829 830 /* 831 ** After execution of this call, the return address 832 ** (in the TEMP register) points to the following 833 ** data structure block. 834 ** So copy it to the DSA register, and start 835 ** processing of this data structure. 836 ** 837 ** CALL 838 ** <RESEL_TMP> 839 */ 840 841 struct link call_tmp; 842 843 /* 844 ** This is the data structure which is 845 ** to be executed by the script processor. 846 */ 847 848 struct dsb phys; 849 850 /* 851 ** If a data transfer phase is terminated too early 852 ** (after reception of a message (i.e. DISCONNECT)), 853 ** we have to prepare a mini script to transfer 854 ** the rest of the data. 855 */ 856 857 u_long patch[8]; 858 859 /* 860 ** The general SCSI driver provides a 861 ** pointer to a control block. 862 */ 863 864 struct scsi_xfer *xfer; 865 866 /* 867 ** We prepare a message to be sent after selection, 868 ** and a second one to be sent after getcc selection. 869 ** Contents are IDENTIFY and SIMPLE_TAG. 870 ** While negotiating sync or wide transfer, 871 ** a SDTM or WDTM message is appended. 872 */ 873 874 u_char scsi_smsg [8]; 875 u_char scsi_smsg2[8]; 876 877 /* 878 ** Lock this ccb. 879 ** Flag is used while looking for a free ccb. 880 */ 881 882 u_long magic; 883 884 /* 885 ** Physical address of this instance of ccb 886 */ 887 888 u_long p_ccb; 889 890 /* 891 ** Completion time out for this job. 892 ** It's set to time of start + allowed number of seconds. 893 */ 894 895 u_long tlimit; 896 897 /* 898 ** All ccbs of one hostadapter are chained. 899 */ 900 901 ccb_p link_ccb; 902 903 /* 904 ** All ccbs of one target/lun are chained. 905 */ 906 907 ccb_p next_ccb; 908 909 /* 910 ** Sense command 911 */ 912 913 u_char sensecmd[6]; 914 915 /* 916 ** Tag for this transfer. 917 ** It's patched into jump_ccb. 918 ** If it's not zero, a SIMPLE_TAG 919 ** message is included in smsg. 920 */ 921 922 u_char tag; 923}; 924 925#define CCB_PHYS(cp,lbl) (cp->p_ccb + offsetof(struct ccb, lbl)) 926 927/*========================================================== 928** 929** Declaration of structs: NCR device descriptor 930** 931**========================================================== 932*/ 933 934struct ncb { 935#ifdef __NetBSD__ 936 struct device sc_dev; 937 void *sc_ih; 938#else /* !__NetBSD__ */ 939 int unit; 940#endif /* __NetBSD__ */ 941 942 /*----------------------------------------------- 943 ** Scripts .. 944 **----------------------------------------------- 945 ** 946 ** During reselection the ncr jumps to this point. 947 ** The SFBR register is loaded with the encoded target id. 948 ** 949 ** Jump to the first target. 950 ** 951 ** JUMP 952 ** @(next tcb) 953 */ 954 struct link jump_tcb; 955 956 /*----------------------------------------------- 957 ** Configuration .. 958 **----------------------------------------------- 959 ** 960 ** virtual and physical addresses 961 ** of the 53c810 chip. 962 */ 963 vm_offset_t vaddr; 964 vm_offset_t paddr; 965 966 /* 967 ** pointer to the chip's registers. 968 */ 969 volatile 970 struct ncr_reg* reg; 971 972 /* 973 ** A copy of the script, relocated for this ncb. 974 */ 975 struct script *script; 976 977 /* 978 ** Physical address of this instance of ncb->script 979 */ 980 u_long p_script; 981 982 /* 983 ** The SCSI address of the host adapter. 984 */ 985 u_char myaddr; 986 987 /* 988 ** timing parameters 989 */ 990 u_char ns_async; 991 u_char ns_sync; 992 u_char rv_scntl3; 993 994 /*----------------------------------------------- 995 ** Link to the generic SCSI driver 996 **----------------------------------------------- 997 */ 998 999 struct scsi_link sc_link; 1000 1001 /*----------------------------------------------- 1002 ** Job control 1003 **----------------------------------------------- 1004 ** 1005 ** Commands from user 1006 */ 1007 struct usrcmd user; 1008 u_char order; 1009 1010 /* 1011 ** Target data 1012 */ 1013 struct tcb target[MAX_TARGET]; 1014 1015 /* 1016 ** Start queue. 1017 */ 1018 u_long squeue [MAX_START]; 1019 u_short squeueput; 1020 u_short actccbs; 1021 1022 /* 1023 ** Timeout handler 1024 */ 1025 u_long heartbeat; 1026 u_short ticks; 1027 u_short latetime; 1028 u_long lasttime; 1029 1030 /*----------------------------------------------- 1031 ** Debug and profiling 1032 **----------------------------------------------- 1033 ** 1034 ** register dump 1035 */ 1036 struct ncr_reg regdump; 1037 struct timeval regtime; 1038 1039 /* 1040 ** Profiling data 1041 */ 1042 struct profile profile; 1043 u_long disc_phys; 1044 u_long disc_ref; 1045 1046 /* 1047 ** The global header. 1048 ** Accessible to both the host and the 1049 ** script-processor. 1050 */ 1051 struct head header; 1052 1053 /* 1054 ** The global control block. 1055 ** It's used only during the configuration phase. 1056 ** A target control block will be created 1057 ** after the first successful transfer. 1058 */ 1059 struct ccb ccb; 1060 1061 /* 1062 ** message buffers. 1063 ** Should be longword aligned, 1064 ** because they're written with a 1065 ** COPY script command. 1066 */ 1067 u_char msgout[8]; 1068 u_char msgin [8]; 1069 u_long lastmsg; 1070 1071 /* 1072 ** Buffer for STATUS_IN phase. 1073 */ 1074 u_char scratch; 1075 1076 /* 1077 ** controller chip dependent maximal transfer width. 1078 */ 1079 u_char maxwide; 1080 1081 /* 1082 ** option for M_IDENTIFY message: enables disconnecting 1083 */ 1084 u_char disc; 1085 1086#ifdef NCR_IOMAPPED 1087 /* 1088 ** address of the ncr control registers in io space 1089 */ 1090 u_short port; 1091#endif 1092}; 1093 1094#define NCB_SCRIPT_PHYS(np,lbl) (np->p_script + offsetof (struct script, lbl)) 1095 1096/*========================================================== 1097** 1098** 1099** Script for NCR-Processor. 1100** 1101** Use ncr_script_fill() to create the variable parts. 1102** Use ncr_script_copy_and_bind() to make a copy and 1103** bind to physical addresses. 1104** 1105** 1106**========================================================== 1107** 1108** We have to know the offsets of all labels before 1109** we reach them (for forward jumps). 1110** Therefore we declare a struct here. 1111** If you make changes inside the script, 1112** DONT FORGET TO CHANGE THE LENGTHS HERE! 1113** 1114**---------------------------------------------------------- 1115*/ 1116 1117struct script { 1118 ncrcmd start [ 7]; 1119 ncrcmd start0 [ 2]; 1120 ncrcmd start1 [ 3]; 1121 ncrcmd startpos [ 1]; 1122 ncrcmd tryloop [MAX_START*5+2]; 1123 ncrcmd trysel [ 8]; 1124 ncrcmd skip [ 8]; 1125 ncrcmd skip2 [ 3]; 1126 ncrcmd idle [ 2]; 1127 ncrcmd select [ 22]; 1128 ncrcmd prepare [ 4]; 1129 ncrcmd loadpos [ 14]; 1130 ncrcmd prepare2 [ 24]; 1131 ncrcmd setmsg [ 5]; 1132 ncrcmd clrack [ 2]; 1133 ncrcmd dispatch [ 33]; 1134 ncrcmd no_data [ 17]; 1135 ncrcmd checkatn [ 10]; 1136 ncrcmd command [ 15]; 1137 ncrcmd status [ 27]; 1138 ncrcmd msg_in [ 26]; 1139 ncrcmd msg_bad [ 6]; 1140 ncrcmd msg_parity [ 6]; 1141 ncrcmd msg_reject [ 8]; 1142 ncrcmd msg_ign_residue [ 32]; 1143 ncrcmd msg_extended [ 18]; 1144 ncrcmd msg_ext_2 [ 18]; 1145 ncrcmd msg_wdtr [ 27]; 1146 ncrcmd msg_ext_3 [ 18]; 1147 ncrcmd msg_sdtr [ 27]; 1148 ncrcmd complete [ 13]; 1149 ncrcmd cleanup [ 12]; 1150 ncrcmd cleanup0 [ 11]; 1151 ncrcmd signal [ 10]; 1152 ncrcmd save_dp [ 5]; 1153 ncrcmd restore_dp [ 5]; 1154 ncrcmd disconnect [ 12]; 1155 ncrcmd disconnect0 [ 5]; 1156 ncrcmd disconnect1 [ 23]; 1157 ncrcmd msg_out [ 9]; 1158 ncrcmd msg_out_done [ 7]; 1159 ncrcmd msg_out_abort [ 10]; 1160 ncrcmd getcc [ 4]; 1161 ncrcmd getcc1 [ 5]; 1162#ifdef NCR_GETCC_WITHMSG 1163 ncrcmd getcc2 [ 33]; 1164#else 1165 ncrcmd getcc2 [ 14]; 1166#endif 1167 ncrcmd getcc3 [ 10]; 1168 ncrcmd badgetcc [ 6]; 1169 ncrcmd reselect [ 12]; 1170 ncrcmd reselect2 [ 6]; 1171 ncrcmd resel_tmp [ 5]; 1172 ncrcmd resel_lun [ 18]; 1173 ncrcmd resel_tag [ 24]; 1174 ncrcmd data_in [MAX_SCATTER * 4 + 7]; 1175 ncrcmd data_out [MAX_SCATTER * 4 + 7]; 1176 ncrcmd aborttag [ 4]; 1177 ncrcmd abort [ 22]; 1178 ncrcmd snooptest [ 9]; 1179 ncrcmd snoopend [ 2]; 1180}; 1181 1182/*========================================================== 1183** 1184** 1185** Function headers. 1186** 1187** 1188**========================================================== 1189*/ 1190 1191#ifdef KERNEL 1192static void ncr_alloc_ccb (ncb_p np, struct scsi_xfer * xp); 1193static void ncr_complete (ncb_p np, ccb_p cp); 1194static int ncr_delta (struct timeval * from, struct timeval * to); 1195static void ncr_exception (ncb_p np); 1196static void ncr_free_ccb (ncb_p np, ccb_p cp, int flags); 1197static void ncr_getclock (ncb_p np); 1198static ccb_p ncr_get_ccb (ncb_p np, u_long flags, u_long t,u_long l); 1199static u_int32_t ncr_info (int unit); 1200static void ncr_init (ncb_p np, char * msg, u_long code); 1201static void ncr_intr (void *vnp); 1202static void ncr_int_ma (ncb_p np); 1203static void ncr_int_sir (ncb_p np); 1204static void ncr_int_sto (ncb_p np); 1205#ifndef NEW_SCSICONF 1206static u_long ncr_lookup (char* id); 1207#endif /* NEW_SCSICONF */ 1208static void ncr_min_phys (struct buf *bp); 1209static void ncr_negotiate (struct ncb* np, struct tcb* tp); 1210static void ncr_opennings (ncb_p np, lcb_p lp, struct scsi_xfer * xp); 1211static void ncb_profile (ncb_p np, ccb_p cp); 1212static void ncr_script_copy_and_bind 1213 (struct script * script, ncb_p np); 1214static void ncr_script_fill (struct script * scr); 1215static int ncr_scatter (struct dsb* phys,u_long vaddr,u_long datalen); 1216static void ncr_setmaxtags (tcb_p tp, u_long usrtags); 1217static void ncr_setsync (ncb_p np, ccb_p cp, u_char sxfer); 1218static void ncr_settags (tcb_p tp, lcb_p lp); 1219static void ncr_setwide (ncb_p np, ccb_p cp, u_char wide); 1220static int ncr_show_msg (u_char * msg); 1221static int ncr_snooptest (ncb_p np); 1222static int32_t ncr_start (struct scsi_xfer *xp); 1223static void ncr_timeout (ncb_p np); 1224static void ncr_usercmd (ncb_p np); 1225static void ncr_wakeup (ncb_p np, u_long code); 1226 1227#ifdef __NetBSD__ 1228static int ncr_probe (struct device *, void *, void *); 1229static void ncr_attach (struct device *, struct device *, void *); 1230#else /* !__NetBSD */ 1231static char* ncr_probe (pcici_t tag, pcidi_t type); 1232static void ncr_attach (pcici_t tag, int unit); 1233#endif /* __NetBSD__ */ 1234 1235#endif /* KERNEL */ 1236 1237/*========================================================== 1238** 1239** 1240** Global static data. 1241** 1242** 1243**========================================================== 1244*/ 1245 1246 1247static char ident[] = 1248 "\n$Id: ncr.c,v 1.64 1996/02/19 00:03:50 se Exp $\n"; 1249 1250static u_long ncr_version = NCR_VERSION * 11 1251 + (u_long) sizeof (struct ncb) * 7 1252 + (u_long) sizeof (struct ccb) * 5 1253 + (u_long) sizeof (struct lcb) * 3 1254 + (u_long) sizeof (struct tcb) * 2; 1255 1256#ifdef KERNEL 1257static const int nncr=MAX_UNITS; /* XXX to be replaced by SYSCTL */ 1258ncb_p ncrp [MAX_UNITS]; /* XXX to be replaced by SYSCTL */ 1259 1260static int ncr_debug = SCSI_DEBUG_FLAGS; 1261SYSCTL_INT(_debug, OID_AUTO, ncr_debug, CTLFLAG_RW, &ncr_debug, 0, ""); 1262 1263static int ncr_cache; /* to be aligned _NOT_ static */ 1264 1265/*========================================================== 1266** 1267** 1268** Global static data: auto configure 1269** 1270** 1271**========================================================== 1272*/ 1273 1274#define NCR_810_ID (0x00011000ul) 1275#define NCR_810AP_ID (0x00051000ul) 1276#define NCR_815_ID (0x00041000ul) 1277#define NCR_825_ID (0x00031000ul) 1278#define NCR_860_ID (0x00061000ul) 1279#define NCR_875_ID (0x000f1000ul) 1280 1281#ifdef __NetBSD__ 1282 1283struct cfdriver ncrcd = { 1284 NULL, "ncr", ncr_probe, ncr_attach, DV_DISK, sizeof(struct ncb) 1285}; 1286 1287#else /* !__NetBSD__ */ 1288 1289static u_long ncr_count; 1290 1291static struct pci_device ncr_device = { 1292 "ncr", 1293 ncr_probe, 1294 ncr_attach, 1295 &ncr_count, 1296 NULL 1297}; 1298 1299DATA_SET (pcidevice_set, ncr_device); 1300 1301#endif /* !__NetBSD__ */ 1302 1303static struct scsi_adapter ncr_switch = 1304{ 1305 ncr_start, 1306 ncr_min_phys, 1307 0, 1308 0, 1309#ifndef __NetBSD__ 1310 ncr_info, 1311 "ncr", 1312#endif /* !__NetBSD__ */ 1313}; 1314 1315static struct scsi_device ncr_dev = 1316{ 1317 NULL, /* Use default error handler */ 1318 NULL, /* have a queue, served by this */ 1319 NULL, /* have no async handler */ 1320 NULL, /* Use default 'done' routine */ 1321#ifndef __NetBSD__ 1322 "ncr", 1323#endif /* !__NetBSD__ */ 1324}; 1325 1326#ifdef __NetBSD__ 1327 1328#define ncr_name(np) (np->sc_dev.dv_xname) 1329 1330#else /* !__NetBSD__ */ 1331 1332static char *ncr_name (ncb_p np) 1333{ 1334 static char name[10]; 1335 sprintf(name, "ncr%d", np->unit); 1336 return (name); 1337} 1338#endif 1339 1340/*========================================================== 1341** 1342** 1343** Scripts for NCR-Processor. 1344** 1345** Use ncr_script_bind for binding to physical addresses. 1346** 1347** 1348**========================================================== 1349** 1350** NADDR generates a reference to a field of the controller data. 1351** PADDR generates a reference to another part of the script. 1352** RADDR generates a reference to a script processor register. 1353** FADDR generates a reference to a script processor register 1354** with offset. 1355** 1356**---------------------------------------------------------- 1357*/ 1358 1359#define RELOC_SOFTC 0x40000000 1360#define RELOC_LABEL 0x50000000 1361#define RELOC_REGISTER 0x60000000 1362#define RELOC_MASK 0xf0000000 1363 1364#define NADDR(label) (RELOC_SOFTC | offsetof(struct ncb, label)) 1365#define PADDR(label) (RELOC_LABEL | offsetof(struct script, label)) 1366#define RADDR(label) (RELOC_REGISTER | REG(label)) 1367#define FADDR(label,ofs)(RELOC_REGISTER | ((REG(label))+(ofs))) 1368 1369static struct script script0 = { 1370/*--------------------------< START >-----------------------*/ { 1371 /* 1372 ** Claim to be still alive ... 1373 */ 1374 SCR_COPY (sizeof (((struct ncb *)0)->heartbeat)), 1375 (ncrcmd) &time.tv_sec, 1376 NADDR (heartbeat), 1377 /* 1378 ** Make data structure address invalid. 1379 ** clear SIGP. 1380 */ 1381 SCR_LOAD_REG (dsa, 0xff), 1382 0, 1383 SCR_FROM_REG (ctest2), 1384 0, 1385}/*-------------------------< START0 >----------------------*/,{ 1386 /* 1387 ** Hook for interrupted GetConditionCode. 1388 ** Will be patched to ... IFTRUE by 1389 ** the interrupt handler. 1390 */ 1391 SCR_INT ^ IFFALSE (0), 1392 SIR_SENSE_RESTART, 1393 1394}/*-------------------------< START1 >----------------------*/,{ 1395 /* 1396 ** Hook for stalled start queue. 1397 ** Will be patched to IFTRUE by the interrupt handler. 1398 */ 1399 SCR_INT ^ IFFALSE (0), 1400 SIR_STALL_RESTART, 1401 /* 1402 ** Then jump to a certain point in tryloop. 1403 ** Due to the lack of indirect addressing the code 1404 ** is self modifying here. 1405 */ 1406 SCR_JUMP, 1407}/*-------------------------< STARTPOS >--------------------*/,{ 1408 PADDR(tryloop), 1409}/*-------------------------< TRYLOOP >---------------------*/,{ 1410/* 1411** Load an entry of the start queue into dsa 1412** and try to start it by jumping to TRYSEL. 1413** 1414** Because the size depends on the 1415** #define MAX_START parameter, it is filled 1416** in at runtime. 1417** 1418**----------------------------------------------------------- 1419** 1420** ##===========< I=0; i<MAX_START >=========== 1421** || SCR_COPY (4), 1422** || NADDR (squeue[i]), 1423** || RADDR (dsa), 1424** || SCR_CALL, 1425** || PADDR (trysel), 1426** ##========================================== 1427** 1428** SCR_JUMP, 1429** PADDR(tryloop), 1430** 1431**----------------------------------------------------------- 1432*/ 14330 1434 1435}/*-------------------------< TRYSEL >----------------------*/,{ 1436 /* 1437 ** Now: 1438 ** DSA: Address of a Data Structure 1439 ** or Address of the IDLE-Label. 1440 ** 1441 ** TEMP: Address of a script, which tries to 1442 ** start the NEXT entry. 1443 ** 1444 ** Save the TEMP register into the SCRATCHA register. 1445 ** Then copy the DSA to TEMP and RETURN. 1446 ** This is kind of an indirect jump. 1447 ** (The script processor has NO stack, so the 1448 ** CALL is actually a jump and link, and the 1449 ** RETURN is an indirect jump.) 1450 ** 1451 ** If the slot was empty, DSA contains the address 1452 ** of the IDLE part of this script. The processor 1453 ** jumps to IDLE and waits for a reselect. 1454 ** It will wake up and try the same slot again 1455 ** after the SIGP bit becomes set by the host. 1456 ** 1457 ** If the slot was not empty, DSA contains 1458 ** the address of the phys-part of a ccb. 1459 ** The processor jumps to this address. 1460 ** phys starts with head, 1461 ** head starts with launch, 1462 ** so actually the processor jumps to 1463 ** the lauch part. 1464 ** If the entry is scheduled for execution, 1465 ** then launch contains a jump to SELECT. 1466 ** If it's not scheduled, it contains a jump to IDLE. 1467 */ 1468 SCR_COPY (4), 1469 RADDR (temp), 1470 RADDR (scratcha), 1471 SCR_COPY (4), 1472 RADDR (dsa), 1473 RADDR (temp), 1474 SCR_RETURN, 1475 0 1476 1477}/*-------------------------< SKIP >------------------------*/,{ 1478 /* 1479 ** This entry has been canceled. 1480 ** Next time use the next slot. 1481 */ 1482 SCR_COPY (4), 1483 RADDR (scratcha), 1484 PADDR (startpos), 1485 /* 1486 ** patch the launch field. 1487 ** should look like an idle process. 1488 */ 1489 SCR_COPY (4), 1490 RADDR (dsa), 1491 PADDR (skip2), 1492 SCR_COPY (8), 1493 PADDR (idle), 1494}/*-------------------------< SKIP2 >-----------------------*/,{ 1495 0, 1496 SCR_JUMP, 1497 PADDR(start), 1498}/*-------------------------< IDLE >------------------------*/,{ 1499 /* 1500 ** Nothing to do? 1501 ** Wait for reselect. 1502 */ 1503 SCR_JUMP, 1504 PADDR(reselect), 1505 1506}/*-------------------------< SELECT >----------------------*/,{ 1507 /* 1508 ** DSA contains the address of a scheduled 1509 ** data structure. 1510 ** 1511 ** SCRATCHA contains the address of the script, 1512 ** which starts the next entry. 1513 ** 1514 ** Set Initiator mode. 1515 ** 1516 ** (Target mode is left as an exercise for the reader) 1517 */ 1518 1519 SCR_CLR (SCR_TRG), 1520 0, 1521 SCR_LOAD_REG (HS_REG, 0xff), 1522 0, 1523 1524 /* 1525 ** And try to select this target. 1526 */ 1527 SCR_SEL_TBL_ATN ^ offsetof (struct dsb, select), 1528 PADDR (reselect), 1529 1530 /* 1531 ** Now there are 4 possibilities: 1532 ** 1533 ** (1) The ncr looses arbitration. 1534 ** This is ok, because it will try again, 1535 ** when the bus becomes idle. 1536 ** (But beware of the timeout function!) 1537 ** 1538 ** (2) The ncr is reselected. 1539 ** Then the script processor takes the jump 1540 ** to the RESELECT label. 1541 ** 1542 ** (3) The ncr completes the selection. 1543 ** Then it will execute the next statement. 1544 ** 1545 ** (4) There is a selection timeout. 1546 ** Then the ncr should interrupt the host and stop. 1547 ** Unfortunately, it seems to continue execution 1548 ** of the script. But it will fail with an 1549 ** IID-interrupt on the next WHEN. 1550 */ 1551 1552 SCR_JUMPR ^ IFTRUE (WHEN (SCR_MSG_IN)), 1553 0, 1554 1555 /* 1556 ** Save target id to ctest0 register 1557 */ 1558 1559 SCR_FROM_REG (sdid), 1560 0, 1561 SCR_TO_REG (ctest0), 1562 0, 1563 /* 1564 ** Send the IDENTIFY and SIMPLE_TAG messages 1565 ** (and the M_X_SYNC_REQ message) 1566 */ 1567 SCR_MOVE_TBL ^ SCR_MSG_OUT, 1568 offsetof (struct dsb, smsg), 1569#ifdef undef /* XXX better fail than try to deal with this ... */ 1570 SCR_JUMPR ^ IFTRUE (WHEN (SCR_MSG_OUT)), 1571 -16, 1572#endif 1573 SCR_CLR (SCR_ATN), 1574 0, 1575 SCR_COPY (1), 1576 RADDR (sfbr), 1577 NADDR (lastmsg), 1578 /* 1579 ** Selection complete. 1580 ** Next time use the next slot. 1581 */ 1582 SCR_COPY (4), 1583 RADDR (scratcha), 1584 PADDR (startpos), 1585}/*-------------------------< PREPARE >----------------------*/,{ 1586 /* 1587 ** The ncr doesn't have an indirect load 1588 ** or store command. So we have to 1589 ** copy part of the control block to a 1590 ** fixed place, where we can access it. 1591 ** 1592 ** We patch the address part of a 1593 ** COPY command with the DSA-register. 1594 */ 1595 SCR_COPY (4), 1596 RADDR (dsa), 1597 PADDR (loadpos), 1598 /* 1599 ** then we do the actual copy. 1600 */ 1601 SCR_COPY (sizeof (struct head)), 1602 /* 1603 ** continued after the next label ... 1604 */ 1605 1606}/*-------------------------< LOADPOS >---------------------*/,{ 1607 0, 1608 NADDR (header), 1609 /* 1610 ** Mark this ccb as not scheduled. 1611 */ 1612 SCR_COPY (8), 1613 PADDR (idle), 1614 NADDR (header.launch), 1615 /* 1616 ** Set a time stamp for this selection 1617 */ 1618 SCR_COPY (sizeof (struct timeval)), 1619 (ncrcmd) &time, 1620 NADDR (header.stamp.select), 1621 /* 1622 ** load the savep (saved pointer) into 1623 ** the TEMP register (actual pointer) 1624 */ 1625 SCR_COPY (4), 1626 NADDR (header.savep), 1627 RADDR (temp), 1628 /* 1629 ** Initialize the status registers 1630 */ 1631 SCR_COPY (4), 1632 NADDR (header.status), 1633 RADDR (scr0), 1634 1635}/*-------------------------< PREPARE2 >---------------------*/,{ 1636 /* 1637 ** Load the synchronous mode register 1638 */ 1639 SCR_COPY (1), 1640 NADDR (sync_st), 1641 RADDR (sxfer), 1642 /* 1643 ** Load the wide mode and timing register 1644 */ 1645 SCR_COPY (1), 1646 NADDR (wide_st), 1647 RADDR (scntl3), 1648 /* 1649 ** Initialize the msgout buffer with a NOOP message. 1650 */ 1651 SCR_LOAD_REG (scratcha, M_NOOP), 1652 0, 1653 SCR_COPY (1), 1654 RADDR (scratcha), 1655 NADDR (msgout), 1656 SCR_COPY (1), 1657 RADDR (scratcha), 1658 NADDR (msgin), 1659 /* 1660 ** Message in phase ? 1661 */ 1662 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), 1663 PADDR (dispatch), 1664 /* 1665 ** Extended or reject message ? 1666 */ 1667 SCR_FROM_REG (sbdl), 1668 0, 1669 SCR_JUMP ^ IFTRUE (DATA (M_EXTENDED)), 1670 PADDR (msg_in), 1671 SCR_JUMP ^ IFTRUE (DATA (M_REJECT)), 1672 PADDR (msg_reject), 1673 /* 1674 ** normal processing 1675 */ 1676 SCR_JUMP, 1677 PADDR (dispatch), 1678}/*-------------------------< SETMSG >----------------------*/,{ 1679 SCR_COPY (1), 1680 RADDR (scratcha), 1681 NADDR (msgout), 1682 SCR_SET (SCR_ATN), 1683 0, 1684}/*-------------------------< CLRACK >----------------------*/,{ 1685 /* 1686 ** Terminate possible pending message phase. 1687 */ 1688 SCR_CLR (SCR_ACK), 1689 0, 1690 1691}/*-----------------------< DISPATCH >----------------------*/,{ 1692 SCR_FROM_REG (HS_REG), 1693 0, 1694 SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)), 1695 SIR_NEGO_FAILED, 1696 /* 1697 ** remove bogus output signals 1698 */ 1699 SCR_REG_REG (socl, SCR_AND, CACK|CATN), 1700 0, 1701 SCR_RETURN ^ IFTRUE (WHEN (SCR_DATA_OUT)), 1702 0, 1703 SCR_RETURN ^ IFTRUE (IF (SCR_DATA_IN)), 1704 0, 1705 SCR_JUMP ^ IFTRUE (IF (SCR_MSG_OUT)), 1706 PADDR (msg_out), 1707 SCR_JUMP ^ IFTRUE (IF (SCR_MSG_IN)), 1708 PADDR (msg_in), 1709 SCR_JUMP ^ IFTRUE (IF (SCR_COMMAND)), 1710 PADDR (command), 1711 SCR_JUMP ^ IFTRUE (IF (SCR_STATUS)), 1712 PADDR (status), 1713 /* 1714 ** Discard one illegal phase byte, if required. 1715 */ 1716 SCR_LOAD_REG (scratcha, XE_BAD_PHASE), 1717 0, 1718 SCR_COPY (1), 1719 RADDR (scratcha), 1720 NADDR (xerr_st), 1721 SCR_JUMPR ^ IFFALSE (IF (SCR_ILG_OUT)), 1722 8, 1723 SCR_MOVE_ABS (1) ^ SCR_ILG_OUT, 1724 NADDR (scratch), 1725 SCR_JUMPR ^ IFFALSE (IF (SCR_ILG_IN)), 1726 8, 1727 SCR_MOVE_ABS (1) ^ SCR_ILG_IN, 1728 NADDR (scratch), 1729 SCR_JUMP, 1730 PADDR (dispatch), 1731 1732}/*-------------------------< NO_DATA >--------------------*/,{ 1733 /* 1734 ** The target wants to tranfer too much data 1735 ** or in the wrong direction. 1736 ** Remember that in extended error. 1737 */ 1738 SCR_LOAD_REG (scratcha, XE_EXTRA_DATA), 1739 0, 1740 SCR_COPY (1), 1741 RADDR (scratcha), 1742 NADDR (xerr_st), 1743 /* 1744 ** Discard one data byte, if required. 1745 */ 1746 SCR_JUMPR ^ IFFALSE (WHEN (SCR_DATA_OUT)), 1747 8, 1748 SCR_MOVE_ABS (1) ^ SCR_DATA_OUT, 1749 NADDR (scratch), 1750 SCR_JUMPR ^ IFFALSE (IF (SCR_DATA_IN)), 1751 8, 1752 SCR_MOVE_ABS (1) ^ SCR_DATA_IN, 1753 NADDR (scratch), 1754 /* 1755 ** .. and repeat as required. 1756 */ 1757 SCR_CALL, 1758 PADDR (dispatch), 1759 SCR_JUMP, 1760 PADDR (no_data), 1761}/*-------------------------< CHECKATN >--------------------*/,{ 1762 /* 1763 ** If AAP (bit 1 of scntl0 register) is set 1764 ** and a parity error is detected, 1765 ** the script processor asserts ATN. 1766 ** 1767 ** The target should switch to a MSG_OUT phase 1768 ** to get the message. 1769 */ 1770 SCR_FROM_REG (socl), 1771 0, 1772 SCR_JUMP ^ IFFALSE (MASK (CATN, CATN)), 1773 PADDR (dispatch), 1774 /* 1775 ** count it 1776 */ 1777 SCR_REG_REG (PS_REG, SCR_ADD, 1), 1778 0, 1779 /* 1780 ** Prepare a M_ID_ERROR message 1781 ** (initiator detected error). 1782 ** The target should retry the transfer. 1783 */ 1784 SCR_LOAD_REG (scratcha, M_ID_ERROR), 1785 0, 1786 SCR_JUMP, 1787 PADDR (setmsg), 1788 1789}/*-------------------------< COMMAND >--------------------*/,{ 1790 /* 1791 ** If this is not a GETCC transfer ... 1792 */ 1793 SCR_FROM_REG (SS_REG), 1794 0, 1795/*<<<*/ SCR_JUMPR ^ IFTRUE (DATA (S_CHECK_COND)), 1796 28, 1797 /* 1798 ** ... set a timestamp ... 1799 */ 1800 SCR_COPY (sizeof (struct timeval)), 1801 (ncrcmd) &time, 1802 NADDR (header.stamp.command), 1803 /* 1804 ** ... and send the command 1805 */ 1806 SCR_MOVE_TBL ^ SCR_COMMAND, 1807 offsetof (struct dsb, cmd), 1808 SCR_JUMP, 1809 PADDR (dispatch), 1810 /* 1811 ** Send the GETCC command 1812 */ 1813/*>>>*/ SCR_MOVE_TBL ^ SCR_COMMAND, 1814 offsetof (struct dsb, scmd), 1815 SCR_JUMP, 1816 PADDR (dispatch), 1817 1818}/*-------------------------< STATUS >--------------------*/,{ 1819 /* 1820 ** set the timestamp. 1821 */ 1822 SCR_COPY (sizeof (struct timeval)), 1823 (ncrcmd) &time, 1824 NADDR (header.stamp.status), 1825 /* 1826 ** If this is a GETCC transfer, 1827 */ 1828 SCR_FROM_REG (SS_REG), 1829 0, 1830/*<<<*/ SCR_JUMPR ^ IFFALSE (DATA (S_CHECK_COND)), 1831 40, 1832 /* 1833 ** get the status 1834 */ 1835 SCR_MOVE_ABS (1) ^ SCR_STATUS, 1836 NADDR (scratch), 1837 /* 1838 ** Save status to scsi_status. 1839 ** Mark as complete. 1840 ** And wait for disconnect. 1841 */ 1842 SCR_TO_REG (SS_REG), 1843 0, 1844 SCR_REG_REG (SS_REG, SCR_OR, S_SENSE), 1845 0, 1846 SCR_LOAD_REG (HS_REG, HS_COMPLETE), 1847 0, 1848 SCR_JUMP, 1849 PADDR (checkatn), 1850 /* 1851 ** If it was no GETCC transfer, 1852 ** save the status to scsi_status. 1853 */ 1854/*>>>*/ SCR_MOVE_ABS (1) ^ SCR_STATUS, 1855 NADDR (scratch), 1856 SCR_TO_REG (SS_REG), 1857 0, 1858 /* 1859 ** if it was no check condition ... 1860 */ 1861 SCR_JUMP ^ IFTRUE (DATA (S_CHECK_COND)), 1862 PADDR (checkatn), 1863 /* 1864 ** ... mark as complete. 1865 */ 1866 SCR_LOAD_REG (HS_REG, HS_COMPLETE), 1867 0, 1868 SCR_JUMP, 1869 PADDR (checkatn), 1870 1871}/*-------------------------< MSG_IN >--------------------*/,{ 1872 /* 1873 ** Get the first byte of the message 1874 ** and save it to SCRATCHA. 1875 ** 1876 ** The script processor doesn't negate the 1877 ** ACK signal after this transfer. 1878 */ 1879 SCR_MOVE_ABS (1) ^ SCR_MSG_IN, 1880 NADDR (msgin[0]), 1881 /* 1882 ** Check for message parity error. 1883 */ 1884 SCR_TO_REG (scratcha), 1885 0, 1886 SCR_FROM_REG (socl), 1887 0, 1888 SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)), 1889 PADDR (msg_parity), 1890 SCR_FROM_REG (scratcha), 1891 0, 1892 /* 1893 ** Parity was ok, handle this message. 1894 */ 1895 SCR_JUMP ^ IFTRUE (DATA (M_COMPLETE)), 1896 PADDR (complete), 1897 SCR_JUMP ^ IFTRUE (DATA (M_SAVE_DP)), 1898 PADDR (save_dp), 1899 SCR_JUMP ^ IFTRUE (DATA (M_RESTORE_DP)), 1900 PADDR (restore_dp), 1901 SCR_JUMP ^ IFTRUE (DATA (M_DISCONNECT)), 1902 PADDR (disconnect), 1903 SCR_JUMP ^ IFTRUE (DATA (M_EXTENDED)), 1904 PADDR (msg_extended), 1905 SCR_JUMP ^ IFTRUE (DATA (M_NOOP)), 1906 PADDR (clrack), 1907 SCR_JUMP ^ IFTRUE (DATA (M_REJECT)), 1908 PADDR (msg_reject), 1909 SCR_JUMP ^ IFTRUE (DATA (M_IGN_RESIDUE)), 1910 PADDR (msg_ign_residue), 1911 /* 1912 ** Rest of the messages left as 1913 ** an exercise ... 1914 ** 1915 ** Unimplemented messages: 1916 ** fall through to MSG_BAD. 1917 */ 1918}/*-------------------------< MSG_BAD >------------------*/,{ 1919 /* 1920 ** unimplemented message - reject it. 1921 */ 1922 SCR_INT, 1923 SIR_REJECT_SENT, 1924 SCR_LOAD_REG (scratcha, M_REJECT), 1925 0, 1926 SCR_JUMP, 1927 PADDR (setmsg), 1928 1929}/*-------------------------< MSG_PARITY >---------------*/,{ 1930 /* 1931 ** count it 1932 */ 1933 SCR_REG_REG (PS_REG, SCR_ADD, 0x01), 1934 0, 1935 /* 1936 ** send a "message parity error" message. 1937 */ 1938 SCR_LOAD_REG (scratcha, M_PARITY), 1939 0, 1940 SCR_JUMP, 1941 PADDR (setmsg), 1942}/*-------------------------< MSG_REJECT >---------------*/,{ 1943 /* 1944 ** If a negotiation was in progress, 1945 ** negotiation failed. 1946 */ 1947 SCR_FROM_REG (HS_REG), 1948 0, 1949 SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)), 1950 SIR_NEGO_FAILED, 1951 /* 1952 ** else make host log this message 1953 */ 1954 SCR_INT ^ IFFALSE (DATA (HS_NEGOTIATE)), 1955 SIR_REJECT_RECEIVED, 1956 SCR_JUMP, 1957 PADDR (clrack), 1958 1959}/*-------------------------< MSG_IGN_RESIDUE >----------*/,{ 1960 /* 1961 ** Terminate cycle 1962 */ 1963 SCR_CLR (SCR_ACK), 1964 0, 1965 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), 1966 PADDR (dispatch), 1967 /* 1968 ** get residue size. 1969 */ 1970 SCR_MOVE_ABS (1) ^ SCR_MSG_IN, 1971 NADDR (msgin[1]), 1972 /* 1973 ** Check for message parity error. 1974 */ 1975 SCR_TO_REG (scratcha), 1976 0, 1977 SCR_FROM_REG (socl), 1978 0, 1979 SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)), 1980 PADDR (msg_parity), 1981 SCR_FROM_REG (scratcha), 1982 0, 1983 /* 1984 ** Size is 0 .. ignore message. 1985 */ 1986 SCR_JUMP ^ IFTRUE (DATA (0)), 1987 PADDR (clrack), 1988 /* 1989 ** Size is not 1 .. have to interrupt. 1990 */ 1991/*<<<*/ SCR_JUMPR ^ IFFALSE (DATA (1)), 1992 40, 1993 /* 1994 ** Check for residue byte in swide register 1995 */ 1996 SCR_FROM_REG (scntl2), 1997 0, 1998/*<<<*/ SCR_JUMPR ^ IFFALSE (MASK (WSR, WSR)), 1999 16, 2000 /* 2001 ** There IS data in the swide register. 2002 ** Discard it. 2003 */ 2004 SCR_REG_REG (scntl2, SCR_OR, WSR), 2005 0, 2006 SCR_JUMP, 2007 PADDR (clrack), 2008 /* 2009 ** Load again the size to the sfbr register. 2010 */ 2011/*>>>*/ SCR_FROM_REG (scratcha), 2012 0, 2013/*>>>*/ SCR_INT, 2014 SIR_IGN_RESIDUE, 2015 SCR_JUMP, 2016 PADDR (clrack), 2017 2018}/*-------------------------< MSG_EXTENDED >-------------*/,{ 2019 /* 2020 ** Terminate cycle 2021 */ 2022 SCR_CLR (SCR_ACK), 2023 0, 2024 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), 2025 PADDR (dispatch), 2026 /* 2027 ** get length. 2028 */ 2029 SCR_MOVE_ABS (1) ^ SCR_MSG_IN, 2030 NADDR (msgin[1]), 2031 /* 2032 ** Check for message parity error. 2033 */ 2034 SCR_TO_REG (scratcha), 2035 0, 2036 SCR_FROM_REG (socl), 2037 0, 2038 SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)), 2039 PADDR (msg_parity), 2040 SCR_FROM_REG (scratcha), 2041 0, 2042 /* 2043 */ 2044 SCR_JUMP ^ IFTRUE (DATA (3)), 2045 PADDR (msg_ext_3), 2046 SCR_JUMP ^ IFFALSE (DATA (2)), 2047 PADDR (msg_bad), 2048}/*-------------------------< MSG_EXT_2 >----------------*/,{ 2049 SCR_CLR (SCR_ACK), 2050 0, 2051 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), 2052 PADDR (dispatch), 2053 /* 2054 ** get extended message code. 2055 */ 2056 SCR_MOVE_ABS (1) ^ SCR_MSG_IN, 2057 NADDR (msgin[2]), 2058 /* 2059 ** Check for message parity error. 2060 */ 2061 SCR_TO_REG (scratcha), 2062 0, 2063 SCR_FROM_REG (socl), 2064 0, 2065 SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)), 2066 PADDR (msg_parity), 2067 SCR_FROM_REG (scratcha), 2068 0, 2069 SCR_JUMP ^ IFTRUE (DATA (M_X_WIDE_REQ)), 2070 PADDR (msg_wdtr), 2071 /* 2072 ** unknown extended message 2073 */ 2074 SCR_JUMP, 2075 PADDR (msg_bad) 2076}/*-------------------------< MSG_WDTR >-----------------*/,{ 2077 SCR_CLR (SCR_ACK), 2078 0, 2079 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), 2080 PADDR (dispatch), 2081 /* 2082 ** get data bus width 2083 */ 2084 SCR_MOVE_ABS (1) ^ SCR_MSG_IN, 2085 NADDR (msgin[3]), 2086 SCR_FROM_REG (socl), 2087 0, 2088 SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)), 2089 PADDR (msg_parity), 2090 /* 2091 ** let the host do the real work. 2092 */ 2093 SCR_INT, 2094 SIR_NEGO_WIDE, 2095 /* 2096 ** let the target fetch our answer. 2097 */ 2098 SCR_SET (SCR_ATN), 2099 0, 2100 SCR_CLR (SCR_ACK), 2101 0, 2102 2103 SCR_INT ^ IFFALSE (WHEN (SCR_MSG_OUT)), 2104 SIR_NEGO_PROTO, 2105 /* 2106 ** Send the M_X_WIDE_REQ 2107 */ 2108 SCR_MOVE_ABS (4) ^ SCR_MSG_OUT, 2109 NADDR (msgout), 2110 SCR_CLR (SCR_ATN), 2111 0, 2112 SCR_COPY (1), 2113 RADDR (sfbr), 2114 NADDR (lastmsg), 2115 SCR_JUMP, 2116 PADDR (msg_out_done), 2117 2118}/*-------------------------< MSG_EXT_3 >----------------*/,{ 2119 SCR_CLR (SCR_ACK), 2120 0, 2121 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), 2122 PADDR (dispatch), 2123 /* 2124 ** get extended message code. 2125 */ 2126 SCR_MOVE_ABS (1) ^ SCR_MSG_IN, 2127 NADDR (msgin[2]), 2128 /* 2129 ** Check for message parity error. 2130 */ 2131 SCR_TO_REG (scratcha), 2132 0, 2133 SCR_FROM_REG (socl), 2134 0, 2135 SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)), 2136 PADDR (msg_parity), 2137 SCR_FROM_REG (scratcha), 2138 0, 2139 SCR_JUMP ^ IFTRUE (DATA (M_X_SYNC_REQ)), 2140 PADDR (msg_sdtr), 2141 /* 2142 ** unknown extended message 2143 */ 2144 SCR_JUMP, 2145 PADDR (msg_bad) 2146 2147}/*-------------------------< MSG_SDTR >-----------------*/,{ 2148 SCR_CLR (SCR_ACK), 2149 0, 2150 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), 2151 PADDR (dispatch), 2152 /* 2153 ** get period and offset 2154 */ 2155 SCR_MOVE_ABS (2) ^ SCR_MSG_IN, 2156 NADDR (msgin[3]), 2157 SCR_FROM_REG (socl), 2158 0, 2159 SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)), 2160 PADDR (msg_parity), 2161 /* 2162 ** let the host do the real work. 2163 */ 2164 SCR_INT, 2165 SIR_NEGO_SYNC, 2166 /* 2167 ** let the target fetch our answer. 2168 */ 2169 SCR_SET (SCR_ATN), 2170 0, 2171 SCR_CLR (SCR_ACK), 2172 0, 2173 2174 SCR_INT ^ IFFALSE (WHEN (SCR_MSG_OUT)), 2175 SIR_NEGO_PROTO, 2176 /* 2177 ** Send the M_X_SYNC_REQ 2178 */ 2179 SCR_MOVE_ABS (5) ^ SCR_MSG_OUT, 2180 NADDR (msgout), 2181 SCR_CLR (SCR_ATN), 2182 0, 2183 SCR_COPY (1), 2184 RADDR (sfbr), 2185 NADDR (lastmsg), 2186 SCR_JUMP, 2187 PADDR (msg_out_done), 2188 2189}/*-------------------------< COMPLETE >-----------------*/,{ 2190 /* 2191 ** Complete message. 2192 ** 2193 ** If it's not the get condition code, 2194 ** copy TEMP register to LASTP in header. 2195 */ 2196 SCR_FROM_REG (SS_REG), 2197 0, 2198/*<<<*/ SCR_JUMPR ^ IFTRUE (MASK (S_SENSE, S_SENSE)), 2199 12, 2200 SCR_COPY (4), 2201 RADDR (temp), 2202 NADDR (header.lastp), 2203/*>>>*/ /* 2204 ** When we terminate the cycle by clearing ACK, 2205 ** the target may disconnect immediately. 2206 ** 2207 ** We don't want to be told of an 2208 ** "unexpected disconnect", 2209 ** so we disable this feature. 2210 */ 2211 SCR_REG_REG (scntl2, SCR_AND, 0x7f), 2212 0, 2213 /* 2214 ** Terminate cycle ... 2215 */ 2216 SCR_CLR (SCR_ACK|SCR_ATN), 2217 0, 2218 /* 2219 ** ... and wait for the disconnect. 2220 */ 2221 SCR_WAIT_DISC, 2222 0, 2223}/*-------------------------< CLEANUP >-------------------*/,{ 2224 /* 2225 ** dsa: Pointer to ccb 2226 ** or xxxxxxFF (no ccb) 2227 ** 2228 ** HS_REG: Host-Status (<>0!) 2229 */ 2230 SCR_FROM_REG (dsa), 2231 0, 2232 SCR_JUMP ^ IFTRUE (DATA (0xff)), 2233 PADDR (signal), 2234 /* 2235 ** dsa is valid. 2236 ** save the status registers 2237 */ 2238 SCR_COPY (4), 2239 RADDR (scr0), 2240 NADDR (header.status), 2241 /* 2242 ** and copy back the header to the ccb. 2243 */ 2244 SCR_COPY (4), 2245 RADDR (dsa), 2246 PADDR (cleanup0), 2247 SCR_COPY (sizeof (struct head)), 2248 NADDR (header), 2249}/*-------------------------< CLEANUP0 >--------------------*/,{ 2250 0, 2251 2252 /* 2253 ** If command resulted in "check condition" 2254 ** status and is not yet completed, 2255 ** try to get the condition code. 2256 */ 2257 SCR_FROM_REG (HS_REG), 2258 0, 2259/*<<<*/ SCR_JUMPR ^ IFFALSE (MASK (0, HS_DONEMASK)), 2260 16, 2261 SCR_FROM_REG (SS_REG), 2262 0, 2263 SCR_JUMP ^ IFTRUE (DATA (S_CHECK_COND)), 2264 PADDR(getcc2), 2265 /* 2266 ** And make the DSA register invalid. 2267 */ 2268/*>>>*/ SCR_LOAD_REG (dsa, 0xff), /* invalid */ 2269 0, 2270}/*-------------------------< SIGNAL >----------------------*/,{ 2271 /* 2272 ** if status = queue full, 2273 ** reinsert in startqueue and stall queue. 2274 */ 2275 SCR_FROM_REG (SS_REG), 2276 0, 2277 SCR_INT ^ IFTRUE (DATA (S_QUEUE_FULL)), 2278 SIR_STALL_QUEUE, 2279 /* 2280 ** if job completed ... 2281 */ 2282 SCR_FROM_REG (HS_REG), 2283 0, 2284 /* 2285 ** ... signal completion to the host 2286 */ 2287 SCR_INT_FLY ^ IFFALSE (MASK (0, HS_DONEMASK)), 2288 0, 2289 /* 2290 ** Auf zu neuen Schandtaten! 2291 */ 2292 SCR_JUMP, 2293 PADDR(start), 2294 2295}/*-------------------------< SAVE_DP >------------------*/,{ 2296 /* 2297 ** SAVE_DP message: 2298 ** Copy TEMP register to SAVEP in header. 2299 */ 2300 SCR_COPY (4), 2301 RADDR (temp), 2302 NADDR (header.savep), 2303 SCR_JUMP, 2304 PADDR (clrack), 2305}/*-------------------------< RESTORE_DP >---------------*/,{ 2306 /* 2307 ** RESTORE_DP message: 2308 ** Copy SAVEP in header to TEMP register. 2309 */ 2310 SCR_COPY (4), 2311 NADDR (header.savep), 2312 RADDR (temp), 2313 SCR_JUMP, 2314 PADDR (clrack), 2315 2316}/*-------------------------< DISCONNECT >---------------*/,{ 2317 /* 2318 ** If QUIRK_AUTOSAVE is set, 2319 ** do an "save pointer" operation. 2320 */ 2321 SCR_FROM_REG (QU_REG), 2322 0, 2323/*<<<*/ SCR_JUMPR ^ IFFALSE (MASK (QUIRK_AUTOSAVE, QUIRK_AUTOSAVE)), 2324 12, 2325 /* 2326 ** like SAVE_DP message: 2327 ** Copy TEMP register to SAVEP in header. 2328 */ 2329 SCR_COPY (4), 2330 RADDR (temp), 2331 NADDR (header.savep), 2332/*>>>*/ /* 2333 ** Check if temp==savep or temp==goalp: 2334 ** if not, log a missing save pointer message. 2335 ** In fact, it's a comparison mod 256. 2336 ** 2337 ** Hmmm, I hadn't thought that I would be urged to 2338 ** write this kind of ugly self modifying code. 2339 ** 2340 ** It's unbelievable, but the ncr53c8xx isn't able 2341 ** to subtract one register from another. 2342 */ 2343 SCR_FROM_REG (temp), 2344 0, 2345 /* 2346 ** You are not expected to understand this .. 2347 ** 2348 ** CAUTION: only little endian architectures supported! XXX 2349 */ 2350 SCR_COPY (1), 2351 NADDR (header.savep), 2352 PADDR (disconnect0), 2353}/*-------------------------< DISCONNECT0 >--------------*/,{ 2354/*<<<*/ SCR_JUMPR ^ IFTRUE (DATA (1)), 2355 20, 2356 /* 2357 ** neither this 2358 */ 2359 SCR_COPY (1), 2360 NADDR (header.goalp), 2361 PADDR (disconnect1), 2362}/*-------------------------< DISCONNECT1 >--------------*/,{ 2363 SCR_INT ^ IFFALSE (DATA (1)), 2364 SIR_MISSING_SAVE, 2365/*>>>*/ 2366 2367 /* 2368 ** DISCONNECTing ... 2369 ** 2370 ** disable the "unexpected disconnect" feature, 2371 ** and remove the ACK signal. 2372 */ 2373 SCR_REG_REG (scntl2, SCR_AND, 0x7f), 2374 0, 2375 SCR_CLR (SCR_ACK|SCR_ATN), 2376 0, 2377 /* 2378 ** Wait for the disconnect. 2379 */ 2380 SCR_WAIT_DISC, 2381 0, 2382 /* 2383 ** Profiling: 2384 ** Set a time stamp, 2385 ** and count the disconnects. 2386 */ 2387 SCR_COPY (sizeof (struct timeval)), 2388 (ncrcmd) &time, 2389 NADDR (header.stamp.disconnect), 2390 SCR_COPY (4), 2391 NADDR (disc_phys), 2392 RADDR (temp), 2393 SCR_REG_REG (temp, SCR_ADD, 0x01), 2394 0, 2395 SCR_COPY (4), 2396 RADDR (temp), 2397 NADDR (disc_phys), 2398 /* 2399 ** Status is: DISCONNECTED. 2400 */ 2401 SCR_LOAD_REG (HS_REG, HS_DISCONNECT), 2402 0, 2403 SCR_JUMP, 2404 PADDR (cleanup), 2405 2406}/*-------------------------< MSG_OUT >-------------------*/,{ 2407 /* 2408 ** The target requests a message. 2409 */ 2410 SCR_MOVE_ABS (1) ^ SCR_MSG_OUT, 2411 NADDR (msgout), 2412 SCR_COPY (1), 2413 RADDR (sfbr), 2414 NADDR (lastmsg), 2415 /* 2416 ** If it was no ABORT message ... 2417 */ 2418 SCR_JUMP ^ IFTRUE (DATA (M_ABORT)), 2419 PADDR (msg_out_abort), 2420 /* 2421 ** ... wait for the next phase 2422 ** if it's a message out, send it again, ... 2423 */ 2424 SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_OUT)), 2425 PADDR (msg_out), 2426}/*-------------------------< MSG_OUT_DONE >--------------*/,{ 2427 /* 2428 ** ... else clear the message ... 2429 */ 2430 SCR_LOAD_REG (scratcha, M_NOOP), 2431 0, 2432 SCR_COPY (4), 2433 RADDR (scratcha), 2434 NADDR (msgout), 2435 /* 2436 ** ... and process the next phase 2437 */ 2438 SCR_JUMP, 2439 PADDR (dispatch), 2440}/*-------------------------< MSG_OUT_ABORT >-------------*/,{ 2441 /* 2442 ** After ABORT message, 2443 ** 2444 ** expect an immediate disconnect, ... 2445 */ 2446 SCR_REG_REG (scntl2, SCR_AND, 0x7f), 2447 0, 2448 SCR_CLR (SCR_ACK|SCR_ATN), 2449 0, 2450 SCR_WAIT_DISC, 2451 0, 2452 /* 2453 ** ... and set the status to "ABORTED" 2454 */ 2455 SCR_LOAD_REG (HS_REG, HS_ABORTED), 2456 0, 2457 SCR_JUMP, 2458 PADDR (cleanup), 2459 2460}/*-------------------------< GETCC >-----------------------*/,{ 2461 /* 2462 ** The ncr doesn't have an indirect load 2463 ** or store command. So we have to 2464 ** copy part of the control block to a 2465 ** fixed place, where we can modify it. 2466 ** 2467 ** We patch the address part of a COPY command 2468 ** with the address of the dsa register ... 2469 */ 2470 SCR_COPY (4), 2471 RADDR (dsa), 2472 PADDR (getcc1), 2473 /* 2474 ** ... then we do the actual copy. 2475 */ 2476 SCR_COPY (sizeof (struct head)), 2477}/*-------------------------< GETCC1 >----------------------*/,{ 2478 0, 2479 NADDR (header), 2480 /* 2481 ** Initialize the status registers 2482 */ 2483 SCR_COPY (4), 2484 NADDR (header.status), 2485 RADDR (scr0), 2486}/*-------------------------< GETCC2 >----------------------*/,{ 2487 /* 2488 ** Get the condition code from a target. 2489 ** 2490 ** DSA points to a data structure. 2491 ** Set TEMP to the script location 2492 ** that receives the condition code. 2493 ** 2494 ** Because there is no script command 2495 ** to load a longword into a register, 2496 ** we use a CALL command. 2497 */ 2498/*<<<*/ SCR_CALLR, 2499 24, 2500 /* 2501 ** Get the condition code. 2502 */ 2503 SCR_MOVE_TBL ^ SCR_DATA_IN, 2504 offsetof (struct dsb, sense), 2505 /* 2506 ** No data phase may follow! 2507 */ 2508 SCR_CALL, 2509 PADDR (checkatn), 2510 SCR_JUMP, 2511 PADDR (no_data), 2512/*>>>*/ 2513 2514 /* 2515 ** The CALL jumps to this point. 2516 ** Prepare for a RESTORE_POINTER message. 2517 ** Save the TEMP register into the saved pointer. 2518 */ 2519 SCR_COPY (4), 2520 RADDR (temp), 2521 NADDR (header.savep), 2522 /* 2523 ** Load scratcha, because in case of a selection timeout, 2524 ** the host will expect a new value for startpos in 2525 ** the scratcha register. 2526 */ 2527 SCR_COPY (4), 2528 PADDR (startpos), 2529 RADDR (scratcha), 2530#ifdef NCR_GETCC_WITHMSG 2531 /* 2532 ** If QUIRK_NOMSG is set, select without ATN. 2533 ** and don't send a message. 2534 */ 2535 SCR_FROM_REG (QU_REG), 2536 0, 2537 SCR_JUMP ^ IFTRUE (MASK (QUIRK_NOMSG, QUIRK_NOMSG)), 2538 PADDR(getcc3), 2539 /* 2540 ** Then try to connect to the target. 2541 ** If we are reselected, special treatment 2542 ** of the current job is required before 2543 ** accepting the reselection. 2544 */ 2545 SCR_SEL_TBL_ATN ^ offsetof (struct dsb, select), 2546 PADDR(badgetcc), 2547 /* 2548 ** save target id. 2549 */ 2550 SCR_FROM_REG (sdid), 2551 0, 2552 SCR_TO_REG (ctest0), 2553 0, 2554 /* 2555 ** Send the IDENTIFY message. 2556 ** In case of short transfer, remove ATN. 2557 */ 2558 SCR_MOVE_TBL ^ SCR_MSG_OUT, 2559 offsetof (struct dsb, smsg2), 2560 SCR_CLR (SCR_ATN), 2561 0, 2562 /* 2563 ** save the first byte of the message. 2564 */ 2565 SCR_COPY (1), 2566 RADDR (sfbr), 2567 NADDR (lastmsg), 2568 SCR_JUMP, 2569 PADDR (prepare2), 2570 2571#endif 2572}/*-------------------------< GETCC3 >----------------------*/,{ 2573 /* 2574 ** Try to connect to the target. 2575 ** If we are reselected, special treatment 2576 ** of the current job is required before 2577 ** accepting the reselection. 2578 ** 2579 ** Silly target won't accept a message. 2580 ** Select without ATN. 2581 */ 2582 SCR_SEL_TBL ^ offsetof (struct dsb, select), 2583 PADDR(badgetcc), 2584 /* 2585 ** save target id. 2586 */ 2587 SCR_FROM_REG (sdid), 2588 0, 2589 SCR_TO_REG (ctest0), 2590 0, 2591 /* 2592 ** Force error if selection timeout 2593 */ 2594 SCR_JUMPR ^ IFTRUE (WHEN (SCR_MSG_IN)), 2595 0, 2596 /* 2597 ** don't negotiate. 2598 */ 2599 SCR_JUMP, 2600 PADDR (prepare2), 2601 2602}/*------------------------< BADGETCC >---------------------*/,{ 2603 /* 2604 ** If SIGP was set, clear it and try again. 2605 */ 2606 SCR_FROM_REG (ctest2), 2607 0, 2608 SCR_JUMP ^ IFTRUE (MASK (CSIGP,CSIGP)), 2609 PADDR (getcc2), 2610 SCR_INT, 2611 SIR_SENSE_FAILED, 2612}/*-------------------------< RESELECT >--------------------*/,{ 2613 /* 2614 ** make the DSA invalid. 2615 */ 2616 SCR_LOAD_REG (dsa, 0xff), 2617 0, 2618 SCR_CLR (SCR_TRG), 2619 0, 2620 /* 2621 ** Sleep waiting for a reselection. 2622 ** If SIGP is set, special treatment. 2623 ** 2624 ** Zu allem bereit .. 2625 */ 2626 SCR_WAIT_RESEL, 2627 PADDR(reselect2), 2628 /* 2629 ** ... zu nichts zu gebrauchen ? 2630 ** 2631 ** load the target id into the SFBR 2632 ** and jump to the control block. 2633 ** 2634 ** Look at the declarations of 2635 ** - struct ncb 2636 ** - struct tcb 2637 ** - struct lcb 2638 ** - struct ccb 2639 ** to understand what's going on. 2640 */ 2641 SCR_REG_SFBR (ssid, SCR_AND, 0x87), 2642 0, 2643 SCR_TO_REG (ctest0), 2644 0, 2645 SCR_JUMP, 2646 NADDR (jump_tcb), 2647}/*-------------------------< RESELECT2 >-------------------*/,{ 2648 /* 2649 ** If it's not connected :( 2650 ** -> interrupted by SIGP bit. 2651 ** Jump to start. 2652 */ 2653 SCR_FROM_REG (ctest2), 2654 0, 2655 SCR_JUMP ^ IFTRUE (MASK (CSIGP,CSIGP)), 2656 PADDR (start), 2657 SCR_JUMP, 2658 PADDR (reselect), 2659 2660}/*-------------------------< RESEL_TMP >-------------------*/,{ 2661 /* 2662 ** The return address in TEMP 2663 ** is in fact the data structure address, 2664 ** so copy it to the DSA register. 2665 */ 2666 SCR_COPY (4), 2667 RADDR (temp), 2668 RADDR (dsa), 2669 SCR_JUMP, 2670 PADDR (prepare), 2671 2672}/*-------------------------< RESEL_LUN >-------------------*/,{ 2673 /* 2674 ** come back to this point 2675 ** to get an IDENTIFY message 2676 ** Wait for a msg_in phase. 2677 */ 2678/*<<<*/ SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)), 2679 48, 2680 /* 2681 ** message phase 2682 ** It's not a sony, it's a trick: 2683 ** read the data without acknowledging it. 2684 */ 2685 SCR_FROM_REG (sbdl), 2686 0, 2687/*<<<*/ SCR_JUMPR ^ IFFALSE (MASK (M_IDENTIFY, 0x98)), 2688 32, 2689 /* 2690 ** It WAS an Identify message. 2691 ** get it and ack it! 2692 */ 2693 SCR_MOVE_ABS (1) ^ SCR_MSG_IN, 2694 NADDR (msgin), 2695 SCR_CLR (SCR_ACK), 2696 0, 2697 /* 2698 ** Mask out the lun. 2699 */ 2700 SCR_REG_REG (sfbr, SCR_AND, 0x07), 2701 0, 2702 SCR_RETURN, 2703 0, 2704 /* 2705 ** No message phase or no IDENTIFY message: 2706 ** return 0. 2707 */ 2708/*>>>*/ SCR_LOAD_SFBR (0), 2709 0, 2710 SCR_RETURN, 2711 0, 2712 2713}/*-------------------------< RESEL_TAG >-------------------*/,{ 2714 /* 2715 ** come back to this point 2716 ** to get a SIMPLE_TAG message 2717 ** Wait for a MSG_IN phase. 2718 */ 2719/*<<<*/ SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)), 2720 64, 2721 /* 2722 ** message phase 2723 ** It's a trick - read the data 2724 ** without acknowledging it. 2725 */ 2726 SCR_FROM_REG (sbdl), 2727 0, 2728/*<<<*/ SCR_JUMPR ^ IFFALSE (DATA (M_SIMPLE_TAG)), 2729 48, 2730 /* 2731 ** It WAS a SIMPLE_TAG message. 2732 ** get it and ack it! 2733 */ 2734 SCR_MOVE_ABS (1) ^ SCR_MSG_IN, 2735 NADDR (msgin), 2736 SCR_CLR (SCR_ACK), 2737 0, 2738 /* 2739 ** Wait for the second byte (the tag) 2740 */ 2741/*<<<*/ SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)), 2742 24, 2743 /* 2744 ** Get it and ack it! 2745 */ 2746 SCR_MOVE_ABS (1) ^ SCR_MSG_IN, 2747 NADDR (msgin), 2748 SCR_CLR (SCR_ACK|SCR_CARRY), 2749 0, 2750 SCR_RETURN, 2751 0, 2752 /* 2753 ** No message phase or no SIMPLE_TAG message 2754 ** or no second byte: return 0. 2755 */ 2756/*>>>*/ SCR_LOAD_SFBR (0), 2757 0, 2758 SCR_SET (SCR_CARRY), 2759 0, 2760 SCR_RETURN, 2761 0, 2762 2763}/*-------------------------< DATA_IN >--------------------*/,{ 2764/* 2765** Because the size depends on the 2766** #define MAX_SCATTER parameter, 2767** it is filled in at runtime. 2768** 2769** SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_IN)), 2770** PADDR (no_data), 2771** SCR_COPY (sizeof (struct timeval)), 2772** (ncrcmd) &time, 2773** NADDR (header.stamp.data), 2774** SCR_MOVE_TBL ^ SCR_DATA_IN, 2775** offsetof (struct dsb, data[ 0]), 2776** 2777** ##===========< i=1; i<MAX_SCATTER >========= 2778** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)), 2779** || PADDR (checkatn), 2780** || SCR_MOVE_TBL ^ SCR_DATA_IN, 2781** || offsetof (struct dsb, data[ i]), 2782** ##========================================== 2783** 2784** SCR_CALL, 2785** PADDR (checkatn), 2786** SCR_JUMP, 2787** PADDR (no_data), 2788*/ 27890 2790}/*-------------------------< DATA_OUT >-------------------*/,{ 2791/* 2792** Because the size depends on the 2793** #define MAX_SCATTER parameter, 2794** it is filled in at runtime. 2795** 2796** SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_IN)), 2797** PADDR (no_data), 2798** SCR_COPY (sizeof (struct timeval)), 2799** (ncrcmd) &time, 2800** NADDR (header.stamp.data), 2801** SCR_MOVE_TBL ^ SCR_DATA_OUT, 2802** offsetof (struct dsb, data[ 0]), 2803** 2804** ##===========< i=1; i<MAX_SCATTER >========= 2805** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)), 2806** || PADDR (dispatch), 2807** || SCR_MOVE_TBL ^ SCR_DATA_OUT, 2808** || offsetof (struct dsb, data[ i]), 2809** ##========================================== 2810** 2811** SCR_CALL, 2812** PADDR (dispatch), 2813** SCR_JUMP, 2814** PADDR (no_data), 2815** 2816**--------------------------------------------------------- 2817*/ 2818(u_long)&ident 2819 2820}/*-------------------------< ABORTTAG >-------------------*/,{ 2821 /* 2822 ** Abort a bad reselection. 2823 ** Set the message to ABORT vs. ABORT_TAG 2824 */ 2825 SCR_LOAD_REG (scratcha, M_ABORT_TAG), 2826 0, 2827 SCR_JUMPR ^ IFFALSE (CARRYSET), 2828 8, 2829}/*-------------------------< ABORT >----------------------*/,{ 2830 SCR_LOAD_REG (scratcha, M_ABORT), 2831 0, 2832 SCR_COPY (1), 2833 RADDR (scratcha), 2834 NADDR (msgout), 2835 SCR_SET (SCR_ATN), 2836 0, 2837 SCR_CLR (SCR_ACK), 2838 0, 2839 /* 2840 ** and send it. 2841 ** we expect an immediate disconnect 2842 */ 2843 SCR_REG_REG (scntl2, SCR_AND, 0x7f), 2844 0, 2845 SCR_MOVE_ABS (1) ^ SCR_MSG_OUT, 2846 NADDR (msgout), 2847 SCR_COPY (1), 2848 RADDR (sfbr), 2849 NADDR (lastmsg), 2850 SCR_CLR (SCR_ACK|SCR_ATN), 2851 0, 2852 SCR_WAIT_DISC, 2853 0, 2854 SCR_JUMP, 2855 PADDR (start), 2856}/*-------------------------< SNOOPTEST >-------------------*/,{ 2857 /* 2858 ** Read the variable. 2859 */ 2860 SCR_COPY (4), 2861 (ncrcmd) &ncr_cache, 2862 RADDR (scratcha), 2863 /* 2864 ** Write the variable. 2865 */ 2866 SCR_COPY (4), 2867 RADDR (temp), 2868 (ncrcmd) &ncr_cache, 2869 /* 2870 ** Read back the variable. 2871 */ 2872 SCR_COPY (4), 2873 (ncrcmd) &ncr_cache, 2874 RADDR (temp), 2875}/*-------------------------< SNOOPEND >-------------------*/,{ 2876 /* 2877 ** And stop. 2878 */ 2879 SCR_INT, 2880 99, 2881}/*--------------------------------------------------------*/ 2882}; 2883 2884/*========================================================== 2885** 2886** 2887** Fill in #define dependent parts of the script 2888** 2889** 2890**========================================================== 2891*/ 2892 2893void ncr_script_fill (struct script * scr) 2894{ 2895 int i; 2896 ncrcmd *p; 2897 2898 p = scr->tryloop; 2899 for (i=0; i<MAX_START; i++) { 2900 *p++ =SCR_COPY (4); 2901 *p++ =NADDR (squeue[i]); 2902 *p++ =RADDR (dsa); 2903 *p++ =SCR_CALL; 2904 *p++ =PADDR (trysel); 2905 }; 2906 *p++ =SCR_JUMP; 2907 *p++ =PADDR(tryloop); 2908 2909 assert ((u_long)p == (u_long)&scr->tryloop + sizeof (scr->tryloop)); 2910 2911 p = scr->data_in; 2912 2913 *p++ =SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_IN)); 2914 *p++ =PADDR (no_data); 2915 *p++ =SCR_COPY (sizeof (struct timeval)); 2916 *p++ =(ncrcmd) &time; 2917 *p++ =NADDR (header.stamp.data); 2918 *p++ =SCR_MOVE_TBL ^ SCR_DATA_IN; 2919 *p++ =offsetof (struct dsb, data[ 0]); 2920 2921 for (i=1; i<MAX_SCATTER; i++) { 2922 *p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)); 2923 *p++ =PADDR (checkatn); 2924 *p++ =SCR_MOVE_TBL ^ SCR_DATA_IN; 2925 *p++ =offsetof (struct dsb, data[i]); 2926 }; 2927 2928 *p++ =SCR_CALL; 2929 *p++ =PADDR (checkatn); 2930 *p++ =SCR_JUMP; 2931 *p++ =PADDR (no_data); 2932 2933 assert ((u_long)p == (u_long)&scr->data_in + sizeof (scr->data_in)); 2934 2935 p = scr->data_out; 2936 2937 *p++ =SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_OUT)); 2938 *p++ =PADDR (no_data); 2939 *p++ =SCR_COPY (sizeof (struct timeval)); 2940 *p++ =(ncrcmd) &time; 2941 *p++ =NADDR (header.stamp.data); 2942 *p++ =SCR_MOVE_TBL ^ SCR_DATA_OUT; 2943 *p++ =offsetof (struct dsb, data[ 0]); 2944 2945 for (i=1; i<MAX_SCATTER; i++) { 2946 *p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)); 2947 *p++ =PADDR (dispatch); 2948 *p++ =SCR_MOVE_TBL ^ SCR_DATA_OUT; 2949 *p++ =offsetof (struct dsb, data[i]); 2950 }; 2951 2952 *p++ =SCR_CALL; 2953 *p++ =PADDR (dispatch); 2954 *p++ =SCR_JUMP; 2955 *p++ =PADDR (no_data); 2956 2957 assert ((u_long)p == (u_long)&scr->data_out + sizeof (scr->data_out)); 2958} 2959 2960/*========================================================== 2961** 2962** 2963** Copy and rebind a script. 2964** 2965** 2966**========================================================== 2967*/ 2968 2969static void ncr_script_copy_and_bind (struct script *script, ncb_p np) 2970{ 2971 ncrcmd opcode, new, old; 2972 ncrcmd *src, *dst, *start, *end; 2973 int relocs; 2974 2975#ifndef __NetBSD__ 2976 np->script = (struct script*) vm_page_alloc_contig 2977 (round_page(sizeof (struct script)), 0x100000, 0xffffffff, PAGE_SIZE); 2978#else /* !__NetBSD___ */ 2979 np->script = (struct script *) 2980 malloc (sizeof (struct script), M_DEVBUF, M_WAITOK); 2981#endif /* __NetBSD__ */ 2982 2983 np->p_script = vtophys(np->script); 2984 2985 src = script->start; 2986 dst = np->script->start; 2987 2988 start = src; 2989 end = src + (sizeof (struct script) / 4); 2990 2991 while (src < end) { 2992 2993 *dst++ = opcode = *src++; 2994 2995 /* 2996 ** If we forget to change the length 2997 ** in struct script, a field will be 2998 ** padded with 0. This is an illegal 2999 ** command. 3000 */ 3001 3002 if (opcode == 0) { 3003 printf ("%s: ERROR0 IN SCRIPT at %d.\n", 3004 ncr_name(np), src-start-1); 3005 DELAY (1000000); 3006 }; 3007 3008 if (DEBUG_FLAGS & DEBUG_SCRIPT) 3009 printf ("%x: <%x>\n", 3010 (unsigned)(src-1), (unsigned)opcode); 3011 3012 /* 3013 ** We don't have to decode ALL commands 3014 */ 3015 switch (opcode >> 28) { 3016 3017 case 0xc: 3018 /* 3019 ** COPY has TWO arguments. 3020 */ 3021 relocs = 2; 3022 if ((src[0] ^ src[1]) & 3) { 3023 printf ("%s: ERROR1 IN SCRIPT at %d.\n", 3024 ncr_name(np), src-start-1); 3025 DELAY (1000000); 3026 }; 3027 break; 3028 3029 case 0x0: 3030 /* 3031 ** MOVE (absolute address) 3032 */ 3033 relocs = 1; 3034 break; 3035 3036 case 0x8: 3037 /* 3038 ** JUMP / CALL 3039 ** dont't relocate if relative :-) 3040 */ 3041 if (opcode & 0x00800000) 3042 relocs = 0; 3043 else 3044 relocs = 1; 3045 break; 3046 3047 case 0x4: 3048 case 0x5: 3049 case 0x6: 3050 case 0x7: 3051 relocs = 1; 3052 break; 3053 3054 default: 3055 relocs = 0; 3056 break; 3057 }; 3058 3059 if (relocs) { 3060 while (relocs--) { 3061 old = *src++; 3062 3063 switch (old & RELOC_MASK) { 3064 case RELOC_REGISTER: 3065 new = (old & ~RELOC_MASK) + np->paddr; 3066 break; 3067 case RELOC_LABEL: 3068 new = (old & ~RELOC_MASK) + np->p_script; 3069 break; 3070 case RELOC_SOFTC: 3071 new = (old & ~RELOC_MASK) + vtophys(np); 3072 break; 3073 case 0: 3074 /* Don't relocate a 0 address. */ 3075 if (old == 0) { 3076 new = old; 3077 break; 3078 } 3079 /* fall through */ 3080 default: 3081 new = vtophys(old); 3082 break; 3083 } 3084 3085 *dst++ = new; 3086 } 3087 } else 3088 *dst++ = *src++; 3089 3090 }; 3091} 3092 3093/*========================================================== 3094** 3095** 3096** Auto configuration. 3097** 3098** 3099**========================================================== 3100*/ 3101 3102/*---------------------------------------------------------- 3103** 3104** Reduce the transfer length to the max value 3105** we can transfer safely. 3106** 3107** Reading a block greater then MAX_SIZE from the 3108** raw (character) device exercises a memory leak 3109** in the vm subsystem. This is common to ALL devices. 3110** We have submitted a description of this bug to 3111** <FreeBSD-bugs@freefall.cdrom.com>. 3112** It should be fixed in the current release. 3113** 3114**---------------------------------------------------------- 3115*/ 3116 3117void ncr_min_phys (struct buf *bp) 3118{ 3119 if ((unsigned long)bp->b_bcount > MAX_SIZE) bp->b_bcount = MAX_SIZE; 3120} 3121 3122/*---------------------------------------------------------- 3123** 3124** Maximal number of outstanding requests per target. 3125** 3126**---------------------------------------------------------- 3127*/ 3128 3129u_int32_t ncr_info (int unit) 3130{ 3131 return (1); /* may be changed later */ 3132} 3133 3134/*---------------------------------------------------------- 3135** 3136** Probe the hostadapter. 3137** 3138**---------------------------------------------------------- 3139*/ 3140 3141#ifdef __NetBSD__ 3142 3143int 3144ncr_probe(parent, match, aux) 3145 struct device *parent; 3146 void *match, *aux; 3147{ 3148 struct cfdata *cf = match; 3149 struct pci_attach_args *pa = aux; 3150 3151#if 0 3152 if (!pci_targmatch(cf, pa)) 3153 return 0; 3154#endif 3155 if (pa->pa_id != NCR_810_ID && 3156 pa->pa_id != NCR_810AP_ID && 3157 pa->pa_id != NCR_815_ID && 3158 pa->pa_id != NCR_825_ID && 3159 pa->pa_id != NCR_860_ID && 3160 pa->pa_id != NCR_875_ID) 3161 return 0; 3162 3163 return 1; 3164} 3165 3166#else /* !__NetBSD__ */ 3167 3168 3169static char* ncr_probe (pcici_t tag, pcidi_t type) 3170{ 3171 switch (type) { 3172 3173 case NCR_810_ID: 3174 return ("ncr 53c810 scsi"); 3175 3176 case NCR_810AP_ID: 3177 return ("ncr 53c810ap scsi"); 3178 3179 case NCR_815_ID: 3180 return ("ncr 53c815 scsi"); 3181 3182 case NCR_825_ID: 3183 return ("ncr 53c825 wide scsi"); 3184 3185 case NCR_860_ID: 3186 return ("ncr 53c860 scsi"); 3187 3188 case NCR_875_ID: 3189 return ("ncr 53c875 wide scsi"); 3190 } 3191 return (NULL); 3192} 3193 3194#endif /* !__NetBSD__ */ 3195 3196 3197/*========================================================== 3198** 3199** 3200** Auto configuration: attach and init a host adapter. 3201** 3202** 3203**========================================================== 3204*/ 3205 3206#define MIN_ASYNC_PD 40 3207#define MIN_SYNC_PD 20 3208 3209#ifdef __NetBSD__ 3210 3211int 3212ncr_print() 3213{ 3214} 3215 3216void 3217ncr_attach(parent, self, aux) 3218 struct device *parent, *self; 3219 void *aux; 3220{ 3221 struct pci_attach_args *pa = aux; 3222 int retval; 3223 ncb_p np = (void *)self; 3224 3225 /* 3226 ** XXX NetBSD 3227 ** Perhaps try to figure what which model chip it is and print that 3228 ** out. 3229 */ 3230 printf("\n"); 3231 3232 /* 3233 ** Try to map the controller chip to 3234 ** virtual and physical memory. 3235 */ 3236 3237 retval = pci_map_mem(pa->pa_tag, 0x14, &np->vaddr, &np->paddr); 3238 if (retval) 3239 return; 3240 3241 np->sc_ih = pci_map_int(pa->pa_tag, PCI_IPL_BIO, ncr_intr, np); 3242 if (np->sc_ih == NULL) 3243 return; 3244 3245 3246#else /* !__NetBSD__ */ 3247 3248static void ncr_attach (pcici_t config_id, int unit) 3249{ 3250 ncb_p np = (struct ncb*) 0; 3251#if ! (__FreeBSD__ >= 2) 3252 extern unsigned bio_imask; 3253#endif 3254 3255#if (__FreeBSD__ >= 2) 3256 struct scsibus_data *scbus; 3257#endif 3258 3259 /* 3260 ** allocate structure 3261 */ 3262 3263 if (!np) { 3264 np = (ncb_p) malloc (sizeof (struct ncb), M_DEVBUF, M_WAITOK); 3265 if (!np) return; 3266 ncrp[unit]=np; 3267 } 3268 3269 /* 3270 ** initialize structure. 3271 */ 3272 3273 bzero (np, sizeof (*np)); 3274 np->unit = unit; 3275 3276 /* 3277 ** Try to map the controller chip to 3278 ** virtual and physical memory. 3279 */ 3280 3281 if (!pci_map_mem (config_id, 0x14, &np->vaddr, &np->paddr)) 3282 return; 3283 3284#ifdef NCR_IOMAPPED 3285 /* 3286 ** Try to map the controller chip into iospace. 3287 */ 3288 3289 if (!pci_map_port (config_id, 0x10, &np->port)) 3290 return; 3291#endif 3292 3293#endif /* !__NetBSD__ */ 3294 3295 /* 3296 ** Do chip dependent initialization. 3297 */ 3298 3299#ifdef __NetBSD__ 3300 switch (pa->pa_id) { 3301#else /* !__NetBSD__ */ 3302 switch (pci_conf_read (config_id, PCI_ID_REG)) { 3303#endif /* __NetBSD__ */ 3304 case NCR_825_ID: 3305 case NCR_875_ID: 3306 np->maxwide = 1; 3307 break; 3308 default: 3309 np->maxwide = 0; 3310 break; 3311 } 3312 3313 /* 3314 ** Patch script to physical addresses 3315 */ 3316 3317 ncr_script_fill (&script0); 3318 ncr_script_copy_and_bind (&script0, np); 3319 np->ccb.p_ccb = vtophys (&np->ccb); 3320 3321 /* 3322 ** init data structure 3323 */ 3324 3325 np->jump_tcb.l_cmd = SCR_JUMP; 3326 np->jump_tcb.l_paddr = NCB_SCRIPT_PHYS (np, abort); 3327 3328 /* 3329 ** Make the controller's registers available. 3330 ** Now the INB INW INL OUTB OUTW OUTL macros 3331 ** can be used safely. 3332 */ 3333 3334 np->reg = (struct ncr_reg*) np->vaddr; 3335 3336 /* 3337 ** Get SCSI addr of host adapter (set by bios?). 3338 */ 3339 3340 np->myaddr = INB(nc_scid) & 0x07; 3341 if (!np->myaddr) np->myaddr = SCSI_NCR_MYADDR; 3342 3343 /* 3344 ** Get the value of the chip's clock. 3345 ** Find the right value for scntl3. 3346 */ 3347 3348 ncr_getclock (np); 3349 3350 /* 3351 ** Reset chip. 3352 */ 3353 3354 OUTB (nc_istat, SRST); 3355 DELAY (1000); 3356 OUTB (nc_istat, 0 ); 3357 3358#ifdef NCR_DUMP_REG 3359 /* 3360 ** Log the initial register contents 3361 */ 3362 { 3363 int reg; 3364#ifdef __NetBSD__ 3365 u_long config_id = pa->pa_tag; 3366#endif /* __NetBSD__ */ 3367 for (reg=0; reg<256; reg+=4) { 3368 if (reg%16==0) printf ("reg[%2x]", reg); 3369 printf (" %08x", (int)pci_conf_read (config_id, reg)); 3370 if (reg%16==12) printf ("\n"); 3371 } 3372 } 3373 3374 /* 3375 ** Reset chip, once again. 3376 */ 3377 3378 OUTB (nc_istat, SRST); 3379 DELAY (1000); 3380 OUTB (nc_istat, 0 ); 3381 3382#endif /* NCR_DUMP_REG */ 3383 3384 /* 3385 ** Now check the cache handling of the pci chipset. 3386 */ 3387 3388 if (ncr_snooptest (np)) { 3389 printf ("CACHE INCORRECTLY CONFIGURED.\n"); 3390 return; 3391 }; 3392 3393#ifndef __NetBSD__ 3394 /* 3395 ** Install the interrupt handler. 3396 */ 3397 3398 if (!pci_map_int (config_id, ncr_intr, np, &bio_imask)) 3399 printf ("\tinterruptless mode: reduced performance.\n"); 3400#endif /* __NetBSD__ */ 3401 3402 /* 3403 ** After SCSI devices have been opened, we cannot 3404 ** reset the bus safely, so we do it here. 3405 ** Interrupt handler does the real work. 3406 */ 3407 3408 OUTB (nc_scntl1, CRST); 3409 DELAY (1000); 3410 3411 /* 3412 ** Process the reset exception, 3413 ** if interrupts are not enabled yet. 3414 ** Then enable disconnects. 3415 */ 3416 ncr_exception (np); 3417 np->disc = 1; 3418 3419 /* 3420 ** Now let the generic SCSI driver 3421 ** look for the SCSI devices on the bus .. 3422 */ 3423 3424#ifdef __NetBSD__ 3425 np->sc_link.adapter_softc = np; 3426 np->sc_link.adapter_target = np->myaddr; 3427 np->sc_link.openings = 1; 3428#else /* !__NetBSD__ */ 3429 np->sc_link.adapter_unit = unit; 3430 np->sc_link.adapter_softc = np; 3431 np->sc_link.adapter_targ = np->myaddr; 3432 np->sc_link.fordriver = 0; 3433#endif /* !__NetBSD__ */ 3434 np->sc_link.adapter = &ncr_switch; 3435 np->sc_link.device = &ncr_dev; 3436 np->sc_link.flags = 0; 3437 3438#ifdef __NetBSD__ 3439 config_found(self, &np->sc_link, ncr_print); 3440#else /* !__NetBSD__ */ 3441#if (__FreeBSD__ >= 2) 3442 scbus = scsi_alloc_bus(); 3443 if(!scbus) 3444 return; 3445 scbus->adapter_link = &np->sc_link; 3446 3447 if(np->maxwide) 3448 scbus->maxtarg = 15; 3449 3450 if (bootverbose) { 3451 unsigned t_from = 0; 3452 unsigned t_to = scbus->maxtarg; 3453 unsigned myaddr = np->myaddr; 3454 3455 char *txt_and = ""; 3456 printf ("%s scanning for targets ", ncr_name (np)); 3457 if (t_from < myaddr) { 3458 printf ("%d..%d ", t_from, myaddr -1); 3459 txt_and = "and "; 3460 } 3461 if (myaddr < t_to) 3462 printf ("%s%d..%d ", txt_and, myaddr +1, t_to); 3463 printf ("(V%d " NCR_DATE ")\n", NCR_VERSION); 3464 } 3465 3466 scsi_attachdevs (scbus); 3467 scbus = NULL; /* Upper-level SCSI code owns this now */ 3468#else 3469 scsi_attachdevs (&np->sc_link); 3470#endif /* !__FreeBSD__ >= 2 */ 3471#endif /* !__NetBSD__ */ 3472 3473 /* 3474 ** start the timeout daemon 3475 */ 3476 ncr_timeout (np); 3477 np->lasttime=0; 3478 3479 /* 3480 ** use SIMPLE TAG messages by default 3481 */ 3482 3483 np->order = M_SIMPLE_TAG; 3484 3485 /* 3486 ** Done. 3487 */ 3488 3489 return; 3490} 3491 3492/*========================================================== 3493** 3494** 3495** Process pending device interrupts. 3496** 3497** 3498**========================================================== 3499*/ 3500 3501static void 3502ncr_intr(vnp) 3503 void *vnp; 3504{ 3505 ncb_p np = vnp; 3506 int oldspl = splbio(); 3507 3508 if (DEBUG_FLAGS & DEBUG_TINY) printf ("["); 3509 3510 if (INB(nc_istat) & (INTF|SIP|DIP)) { 3511 /* 3512 ** Repeat until no outstanding ints 3513 */ 3514 do { 3515 ncr_exception (np); 3516 } while (INB(nc_istat) & (INTF|SIP|DIP)); 3517 3518 np->ticks = 100; 3519 }; 3520 3521 if (DEBUG_FLAGS & DEBUG_TINY) printf ("]\n"); 3522 3523 splx (oldspl); 3524} 3525 3526/*========================================================== 3527** 3528** 3529** Start execution of a SCSI command. 3530** This is called from the generic SCSI driver. 3531** 3532** 3533**========================================================== 3534*/ 3535 3536static int32_t ncr_start (struct scsi_xfer * xp) 3537{ 3538 ncb_p np = (ncb_p) xp->sc_link->adapter_softc; 3539 3540 struct scsi_generic * cmd = xp->cmd; 3541 ccb_p cp; 3542 lcb_p lp; 3543 tcb_p tp = &np->target[xp->sc_link->target]; 3544 3545 int i, oldspl, segments, flags = xp->flags; 3546 u_char qidx, nego, idmsg, *msgptr; 3547 u_long msglen, msglen2; 3548 3549 /*--------------------------------------------- 3550 ** 3551 ** Reset SCSI bus 3552 ** 3553 ** Interrupt handler does the real work. 3554 ** 3555 **--------------------------------------------- 3556 */ 3557 3558 if (flags & SCSI_RESET) { 3559 OUTB (nc_scntl1, CRST); 3560 DELAY (1000); 3561 return(COMPLETE); 3562 }; 3563 3564 /*--------------------------------------------- 3565 ** 3566 ** Some shortcuts ... 3567 ** 3568 **--------------------------------------------- 3569 */ 3570 3571 if ((xp->sc_link->target == np->myaddr ) || 3572 (xp->sc_link->target >= MAX_TARGET) || 3573 (xp->sc_link->lun >= MAX_LUN ) || 3574 (flags & SCSI_DATA_UIO)) { 3575 xp->error = XS_DRIVER_STUFFUP; 3576 return(COMPLETE); 3577 }; 3578 3579 /*--------------------------------------------- 3580 ** 3581 ** Diskaccess to partial blocks? 3582 ** 3583 **--------------------------------------------- 3584 */ 3585 3586 if ((xp->datalen & 0x1ff) && !(tp->inqdata[0] & 0x1f)) { 3587 switch (cmd->opcode) { 3588 case 0x28: /* READ_BIG (10) */ 3589 case 0xa8: /* READ_HUGE (12) */ 3590 case 0x2a: /* WRITE_BIG (10) */ 3591 case 0xaa: /* WRITE_HUGE(12) */ 3592 PRINT_ADDR(xp); 3593 printf ("access to partial disk block refused.\n"); 3594 xp->error = XS_DRIVER_STUFFUP; 3595 return(COMPLETE); 3596 }; 3597 }; 3598 3599 if (DEBUG_FLAGS & DEBUG_TINY) { 3600 PRINT_ADDR(xp); 3601 printf ("CMD=%x F=%x L=%x ", cmd->opcode, 3602 (unsigned)xp->flags, (unsigned) xp->datalen); 3603 } 3604 3605 /*-------------------------------------------- 3606 ** 3607 ** Sanity checks ... 3608 ** copied from Elischer's Adaptec driver. 3609 ** 3610 **-------------------------------------------- 3611 */ 3612 3613 flags = xp->flags; 3614 if (!(flags & INUSE)) { 3615 printf("%s: ?INUSE?\n", ncr_name (np)); 3616 xp->flags |= INUSE; 3617 }; 3618 3619 if(flags & ITSDONE) { 3620 printf("%s: ?ITSDONE?\n", ncr_name (np)); 3621 xp->flags &= ~ITSDONE; 3622 }; 3623 3624 if (xp->bp) 3625 flags |= (SCSI_NOSLEEP); /* just to be sure */ 3626 3627 /*--------------------------------------------------- 3628 ** 3629 ** Assign a ccb / bind xp 3630 ** 3631 **---------------------------------------------------- 3632 */ 3633 3634 oldspl = splbio(); 3635 3636 if (!(cp=ncr_get_ccb (np, flags, xp->sc_link->target, xp->sc_link->lun))) { 3637 printf ("%s: no ccb.\n", ncr_name (np)); 3638 xp->error = XS_DRIVER_STUFFUP; 3639 splx(oldspl); 3640 return(TRY_AGAIN_LATER); 3641 }; 3642 cp->xfer = xp; 3643 3644 /*--------------------------------------------------- 3645 ** 3646 ** timestamp 3647 ** 3648 **---------------------------------------------------- 3649 */ 3650 3651 bzero (&cp->phys.header.stamp, sizeof (struct tstamp)); 3652 cp->phys.header.stamp.start = time; 3653 3654 /*---------------------------------------------------- 3655 ** 3656 ** Get device quirks from a speciality table. 3657 ** 3658 ** @GENSCSI@ 3659 ** This should be a part of the device table 3660 ** in "scsi_conf.c". 3661 ** 3662 **---------------------------------------------------- 3663 */ 3664 3665 if (tp->quirks & QUIRK_UPDATE) { 3666#ifdef NEW_SCSICONF 3667 tp->quirks = xp->sc_link->quirks; 3668#else 3669 tp->quirks = ncr_lookup ((char*) &tp->inqdata[0]); 3670#endif 3671#ifndef NCR_GETCC_WITHMSG 3672 if (tp->quirks) { 3673 PRINT_ADDR(xp); 3674 printf ("quirks=%x.\n", tp->quirks); 3675 }; 3676#endif 3677 }; 3678 3679 /*--------------------------------------------------- 3680 ** 3681 ** negotiation required? 3682 ** 3683 **---------------------------------------------------- 3684 */ 3685 3686 nego = 0; 3687 3688 if (tp->inqdata[7]) { 3689 /* 3690 ** negotiate synchronous transfers? 3691 */ 3692 3693 if (!tp->period) { 3694 if (SCSI_NCR_MAX_SYNC 3695#if defined (CDROM_ASYNC) || defined (GENERIC) || defined (BOOTMFS) 3696 && ((tp->inqdata[0] & 0x1f) != 5) 3697#endif 3698 && (tp->inqdata[7] & INQ7_SYNC)) { 3699 nego = NS_SYNC; 3700 } else { 3701 tp->period =0xffff; 3702 tp->sval = 0xe0; 3703 PRINT_ADDR(xp); 3704 printf ("asynchronous.\n"); 3705 }; 3706 }; 3707 3708 /* 3709 ** negotiate wide transfers ? 3710 */ 3711 3712 if (!tp->widedone) { 3713 if (tp->inqdata[7] & INQ7_WIDE16) { 3714 if (!nego) nego = NS_WIDE; 3715 } else 3716 tp->widedone=1; 3717 }; 3718 }; 3719 3720 /*--------------------------------------------------- 3721 ** 3722 ** choose a new tag ... 3723 ** 3724 **---------------------------------------------------- 3725 */ 3726 3727 if ((lp = tp->lp[xp->sc_link->lun]) && (lp->usetags)) { 3728 /* 3729 ** assign a tag to this ccb! 3730 */ 3731 while (!cp->tag) { 3732 ccb_p cp2 = lp->next_ccb; 3733 lp->lasttag = lp->lasttag % 255 + 1; 3734 while (cp2 && cp2->tag != lp->lasttag) 3735 cp2 = cp2->next_ccb; 3736 if (cp2) continue; 3737 cp->tag=lp->lasttag; 3738 if (DEBUG_FLAGS & DEBUG_TAGS) { 3739 PRINT_ADDR(xp); 3740 printf ("using tag #%d.\n", cp->tag); 3741 }; 3742 }; 3743 } else { 3744 cp->tag=0; 3745 }; 3746 3747 /*---------------------------------------------------- 3748 ** 3749 ** Build the identify / tag / sdtr message 3750 ** 3751 **---------------------------------------------------- 3752 */ 3753 3754 idmsg = M_IDENTIFY | xp->sc_link->lun; 3755 if ((cp!=&np->ccb) && (np->disc)) 3756 idmsg |= 0x40; 3757 3758 msgptr = cp->scsi_smsg; 3759 msglen = 0; 3760 msgptr[msglen++] = idmsg; 3761 3762 if (cp->tag) { 3763 char tag; 3764 3765 tag = np->order; 3766 if (tag == 0) { 3767 /* 3768 ** Ordered write ops, unordered read ops. 3769 */ 3770 switch (cmd->opcode) { 3771 case 0x08: /* READ_SMALL (6) */ 3772 case 0x28: /* READ_BIG (10) */ 3773 case 0xa8: /* READ_HUGE (12) */ 3774 tag = M_SIMPLE_TAG; 3775 break; 3776 default: 3777 tag = M_ORDERED_TAG; 3778 } 3779 } 3780 msgptr[msglen++] = tag; 3781 msgptr[msglen++] = cp -> tag; 3782 } 3783 3784 switch (nego) { 3785 case NS_SYNC: 3786 msgptr[msglen++] = M_EXTENDED; 3787 msgptr[msglen++] = 3; 3788 msgptr[msglen++] = M_X_SYNC_REQ; 3789 msgptr[msglen++] = tp->minsync; 3790 msgptr[msglen++] = tp->maxoffs; 3791 if (DEBUG_FLAGS & DEBUG_NEGO) { 3792 PRINT_ADDR(cp->xfer); 3793 printf ("sync msgout: "); 3794 ncr_show_msg (&cp->scsi_smsg [msglen-5]); 3795 printf (".\n"); 3796 }; 3797 break; 3798 case NS_WIDE: 3799 msgptr[msglen++] = M_EXTENDED; 3800 msgptr[msglen++] = 2; 3801 msgptr[msglen++] = M_X_WIDE_REQ; 3802 msgptr[msglen++] = tp->usrwide; 3803 if (DEBUG_FLAGS & DEBUG_NEGO) { 3804 PRINT_ADDR(cp->xfer); 3805 printf ("wide msgout: "); 3806 ncr_show_msg (&cp->scsi_smsg [msglen-4]); 3807 printf (".\n"); 3808 }; 3809 break; 3810 }; 3811 3812 /*---------------------------------------------------- 3813 ** 3814 ** Build the identify message for getcc. 3815 ** 3816 **---------------------------------------------------- 3817 */ 3818 3819 cp -> scsi_smsg2 [0] = idmsg; 3820 msglen2 = 1; 3821 3822 /*---------------------------------------------------- 3823 ** 3824 ** Build the data descriptors 3825 ** 3826 **---------------------------------------------------- 3827 */ 3828 3829 segments = ncr_scatter (&cp->phys, (vm_offset_t) xp->data, 3830 (vm_size_t) xp->datalen); 3831 3832 if (segments < 0) { 3833 xp->error = XS_DRIVER_STUFFUP; 3834 ncr_free_ccb(np, cp, flags); 3835 splx(oldspl); 3836 return(COMPLETE); 3837 }; 3838 3839 /*---------------------------------------------------- 3840 ** 3841 ** Set the SAVED_POINTER. 3842 ** 3843 **---------------------------------------------------- 3844 */ 3845 3846 if (flags & SCSI_DATA_IN) { 3847 cp->phys.header.savep = NCB_SCRIPT_PHYS (np, data_in); 3848 cp->phys.header.goalp = cp->phys.header.savep +20 +segments*16; 3849 } else if (flags & SCSI_DATA_OUT) { 3850 cp->phys.header.savep = NCB_SCRIPT_PHYS (np, data_out); 3851 cp->phys.header.goalp = cp->phys.header.savep +20 +segments*16; 3852 } else { 3853 cp->phys.header.savep = NCB_SCRIPT_PHYS (np, no_data); 3854 cp->phys.header.goalp = cp->phys.header.savep; 3855 }; 3856 cp->phys.header.lastp = cp->phys.header.savep; 3857 3858 3859 /*---------------------------------------------------- 3860 ** 3861 ** fill in ccb 3862 ** 3863 **---------------------------------------------------- 3864 ** 3865 ** 3866 ** physical -> virtual backlink 3867 ** Generic SCSI command 3868 */ 3869 cp->phys.header.cp = cp; 3870 /* 3871 ** Startqueue 3872 */ 3873 cp->phys.header.launch.l_paddr = NCB_SCRIPT_PHYS (np, select); 3874 cp->phys.header.launch.l_cmd = SCR_JUMP; 3875 /* 3876 ** select 3877 */ 3878 cp->phys.select.sel_id = xp->sc_link->target; 3879 cp->phys.select.sel_scntl3 = tp->wval; 3880 cp->phys.select.sel_sxfer = tp->sval; 3881 /* 3882 ** message 3883 */ 3884 cp->phys.smsg.addr = CCB_PHYS (cp, scsi_smsg); 3885 cp->phys.smsg.size = msglen; 3886 3887 cp->phys.smsg2.addr = CCB_PHYS (cp, scsi_smsg2); 3888 cp->phys.smsg2.size = msglen2; 3889 /* 3890 ** command 3891 */ 3892 cp->phys.cmd.addr = vtophys (cmd); 3893 cp->phys.cmd.size = xp->cmdlen; 3894 /* 3895 ** sense command 3896 */ 3897 cp->phys.scmd.addr = CCB_PHYS (cp, sensecmd); 3898 cp->phys.scmd.size = 6; 3899 /* 3900 ** patch requested size into sense command 3901 */ 3902 cp->sensecmd[0] = 0x03; 3903 cp->sensecmd[1] = xp->sc_link->lun << 5; 3904 cp->sensecmd[4] = sizeof(struct scsi_sense_data); 3905 if (xp->req_sense_length) 3906 cp->sensecmd[4] = xp->req_sense_length; 3907 /* 3908 ** sense data 3909 */ 3910 cp->phys.sense.addr = vtophys (&cp->xfer->sense); 3911 cp->phys.sense.size = sizeof(struct scsi_sense_data); 3912 /* 3913 ** status 3914 */ 3915 cp->actualquirks = tp->quirks; 3916 cp->host_status = nego ? HS_NEGOTIATE : HS_BUSY; 3917 cp->scsi_status = S_ILLEGAL; 3918 cp->parity_status = 0; 3919 3920 cp->xerr_status = XE_OK; 3921 cp->sync_status = tp->sval; 3922 cp->nego_status = nego; 3923 cp->wide_status = tp->wval; 3924 3925 /*---------------------------------------------------- 3926 ** 3927 ** Critical region: start this job. 3928 ** 3929 **---------------------------------------------------- 3930 */ 3931 3932 /* 3933 ** reselect pattern and activate this job. 3934 */ 3935 3936 cp->jump_ccb.l_cmd = (SCR_JUMP ^ IFFALSE (DATA (cp->tag))); 3937 cp->tlimit = time.tv_sec + xp->timeout / 1000 + 2; 3938 cp->magic = CCB_MAGIC; 3939 3940 /* 3941 ** insert into start queue. 3942 */ 3943 3944 qidx = np->squeueput + 1; 3945 if (qidx >= MAX_START) qidx=0; 3946 np->squeue [qidx ] = NCB_SCRIPT_PHYS (np, idle); 3947 np->squeue [np->squeueput] = CCB_PHYS (cp, phys); 3948 np->squeueput = qidx; 3949 3950 if(DEBUG_FLAGS & DEBUG_QUEUE) 3951 printf ("%s: queuepos=%d tryoffset=%d.\n", ncr_name (np), 3952 np->squeueput, 3953 (unsigned)(np->script->startpos[0]- 3954 (NCB_SCRIPT_PHYS (np, tryloop)))); 3955 3956 /* 3957 ** Script processor may be waiting for reselect. 3958 ** Wake it up. 3959 */ 3960 OUTB (nc_istat, SIGP); 3961 3962 /* 3963 ** and reenable interrupts 3964 */ 3965 splx (oldspl); 3966 3967 /* 3968 ** If interrupts are enabled, return now. 3969 ** Command is successfully queued. 3970 */ 3971 3972#ifdef __NetBSD__ 3973 if (!(flags & SCSI_POLL)) { 3974#else /* !__NetBSD__ */ 3975 if (!(flags & SCSI_NOMASK)) { 3976#endif /* __NetBSD__ */ 3977 if (np->lasttime) { 3978 if(DEBUG_FLAGS & DEBUG_TINY) printf ("Q"); 3979 return(SUCCESSFULLY_QUEUED); 3980 }; 3981 }; 3982 3983 /*---------------------------------------------------- 3984 ** 3985 ** Interrupts not yet enabled - have to poll. 3986 ** 3987 **---------------------------------------------------- 3988 */ 3989 3990 if (DEBUG_FLAGS & DEBUG_POLL) printf("P"); 3991 3992 for (i=xp->timeout; i && !(xp->flags & ITSDONE);i--) { 3993 if ((DEBUG_FLAGS & DEBUG_POLL) && (cp->host_status)) 3994 printf ("%c", (cp->host_status & 0xf) + '0'); 3995 DELAY (1000); 3996 ncr_exception (np); 3997 }; 3998 3999 /* 4000 ** Abort if command not done. 4001 */ 4002 if (!(xp->flags & ITSDONE)) { 4003 printf ("%s: aborting job ...\n", ncr_name (np)); 4004 OUTB (nc_istat, CABRT); 4005 DELAY (100000); 4006 OUTB (nc_istat, SIGP); 4007 ncr_exception (np); 4008 }; 4009 4010 if (!(xp->flags & ITSDONE)) { 4011 printf ("%s: abortion failed at %x.\n", 4012 ncr_name (np), (unsigned) INL(nc_dsp)); 4013 ncr_init (np, "timeout", HS_TIMEOUT); 4014 }; 4015 4016 if (!(xp->flags & ITSDONE)) { 4017 cp-> host_status = HS_SEL_TIMEOUT; 4018 ncr_complete (np, cp); 4019 }; 4020 4021 if (DEBUG_FLAGS & DEBUG_RESULT) { 4022 printf ("%s: result: %x %x.\n", 4023 ncr_name (np), cp->host_status, cp->scsi_status); 4024 }; 4025#ifdef __NetBSD__ 4026 if (!(flags & SCSI_POLL)) 4027#else /* !__NetBSD__ */ 4028 if (!(flags & SCSI_NOMASK)) 4029#endif /* __NetBSD__ */ 4030 return (SUCCESSFULLY_QUEUED); 4031 switch (xp->error) { 4032 case 0 : return (COMPLETE); 4033 case XS_BUSY: return (TRY_AGAIN_LATER); 4034 }; 4035 return (COMPLETE); 4036} 4037 4038/*========================================================== 4039** 4040** 4041** Complete execution of a SCSI command. 4042** Signal completion to the generic SCSI driver. 4043** 4044** 4045**========================================================== 4046*/ 4047 4048void ncr_complete (ncb_p np, ccb_p cp) 4049{ 4050 struct scsi_xfer * xp; 4051 tcb_p tp; 4052 lcb_p lp; 4053 4054 /* 4055 ** Sanity check 4056 */ 4057 4058 if (!cp || (cp->magic!=CCB_MAGIC) || !cp->xfer) return; 4059 cp->magic = 1; 4060 cp->tlimit= 0; 4061 4062 /* 4063 ** No Reselect anymore. 4064 */ 4065 cp->jump_ccb.l_cmd = (SCR_JUMP); 4066 4067 /* 4068 ** No starting. 4069 */ 4070 cp->phys.header.launch.l_paddr= NCB_SCRIPT_PHYS (np, idle); 4071 4072 /* 4073 ** timestamp 4074 */ 4075 ncb_profile (np, cp); 4076 4077 if (DEBUG_FLAGS & DEBUG_TINY) 4078 printf ("CCB=%x STAT=%x/%x\n", (unsigned)cp & 0xfff, 4079 cp->host_status,cp->scsi_status); 4080 4081 xp = cp->xfer; 4082 cp->xfer = NULL; 4083 tp = &np->target[xp->sc_link->target]; 4084 lp = tp->lp[xp->sc_link->lun]; 4085 4086 /* 4087 ** Check for parity errors. 4088 */ 4089 4090 if (cp->parity_status) { 4091 PRINT_ADDR(xp); 4092 printf ("%d parity error(s), fallback.\n", cp->parity_status); 4093 /* 4094 ** fallback to asynch transfer. 4095 */ 4096 tp->usrsync=255; 4097 tp->period = 0; 4098 }; 4099 4100 /* 4101 ** Check for extended errors. 4102 */ 4103 4104 if (cp->xerr_status != XE_OK) { 4105 PRINT_ADDR(xp); 4106 switch (cp->xerr_status) { 4107 case XE_EXTRA_DATA: 4108 printf ("extraneous data discarded.\n"); 4109 break; 4110 case XE_BAD_PHASE: 4111 printf ("illegal scsi phase (4/5).\n"); 4112 break; 4113 default: 4114 printf ("extended error %d.\n", cp->xerr_status); 4115 break; 4116 }; 4117 if (cp->host_status==HS_COMPLETE) 4118 cp->host_status = HS_FAIL; 4119 }; 4120 4121 /* 4122 ** Check the status. 4123 */ 4124#ifdef __NetBSD__ 4125 if (xp->error != XS_NOERROR) { 4126 4127 /* 4128 ** Don't override the error value. 4129 */ 4130 } else 4131#endif /* __NetBSD__ */ 4132 if ( (cp->host_status == HS_COMPLETE) 4133 && (cp->scsi_status == S_GOOD)) { 4134 4135 /* 4136 ** All went well. 4137 */ 4138 4139 xp->resid = 0; 4140 4141 /* 4142 ** if (cp->phys.header.lastp != cp->phys.header.goalp)... 4143 ** 4144 ** @RESID@ 4145 ** Could dig out the correct value for resid, 4146 ** but it would be quite complicated. 4147 ** 4148 ** The ah1542.c driver sets it to 0 too ... 4149 */ 4150 4151 /* 4152 ** Try to assign a ccb to this nexus 4153 */ 4154 ncr_alloc_ccb (np, xp); 4155 4156 /* 4157 ** On inquire cmd (0x12) save some data. 4158 */ 4159 if (xp->cmd->opcode == 0x12) { 4160 bcopy ( xp->data, 4161 &tp->inqdata, 4162 sizeof (tp->inqdata)); 4163 4164 /* 4165 ** set number of tags 4166 */ 4167 ncr_setmaxtags (tp, tp->usrtags); 4168 4169 /* 4170 ** prepare negotiation of synch and wide. 4171 */ 4172 ncr_negotiate (np, tp); 4173 4174 /* 4175 ** force quirks update before next command start 4176 */ 4177 tp->quirks |= QUIRK_UPDATE; 4178 }; 4179 4180 /* 4181 ** Announce changes to the generic driver 4182 */ 4183 if (lp) { 4184 ncr_settags (tp, lp); 4185 if (lp->reqlink != lp->actlink) 4186 ncr_opennings (np, lp, xp); 4187 }; 4188 4189 tp->bytes += xp->datalen; 4190 tp->transfers ++; 4191#ifndef __NetBSD__ 4192 } else if (xp->flags & SCSI_ERR_OK) { 4193 4194 /* 4195 ** Not correct, but errors expected. 4196 */ 4197 xp->resid = 0; 4198#endif /* !__NetBSD__ */ 4199 } else if ((cp->host_status == HS_COMPLETE) 4200 && (cp->scsi_status == (S_SENSE|S_GOOD))) { 4201 4202 /* 4203 ** Check condition code 4204 */ 4205 xp->error = XS_SENSE; 4206 4207 if (DEBUG_FLAGS & (DEBUG_RESULT|DEBUG_TINY)) { 4208 u_char * p = (u_char*) & xp->sense; 4209 int i; 4210 printf ("\n%s: sense data:", ncr_name (np)); 4211 for (i=0; i<14; i++) printf (" %x", *p++); 4212 printf (".\n"); 4213 }; 4214 4215 } else if ((cp->host_status == HS_COMPLETE) 4216 && (cp->scsi_status == S_BUSY)) { 4217 4218 /* 4219 ** Target is busy. 4220 */ 4221 xp->error = XS_BUSY; 4222 4223 } else if ((cp->host_status == HS_SEL_TIMEOUT) 4224 || (cp->host_status == HS_TIMEOUT)) { 4225 4226 /* 4227 ** No response 4228 */ 4229 xp->error = XS_TIMEOUT; 4230 4231 } else { 4232 4233 /* 4234 ** Other protocol messes 4235 */ 4236 PRINT_ADDR(xp); 4237 printf ("COMMAND FAILED (%x %x) @%x.\n", 4238 cp->host_status, cp->scsi_status, (unsigned)cp); 4239 4240 xp->error = XS_TIMEOUT; 4241 } 4242 4243 xp->flags |= ITSDONE; 4244 4245 /* 4246 ** trace output 4247 */ 4248 4249 if (tp->usrflag & UF_TRACE) { 4250 u_char * p; 4251 int i; 4252 PRINT_ADDR(xp); 4253 printf (" CMD:"); 4254 p = (u_char*) &xp->cmd->opcode; 4255 for (i=0; i<xp->cmdlen; i++) printf (" %x", *p++); 4256 4257 if (cp->host_status==HS_COMPLETE) { 4258 switch (cp->scsi_status) { 4259 case S_GOOD: 4260 printf (" GOOD"); 4261 break; 4262 case S_CHECK_COND: 4263 printf (" SENSE:"); 4264 p = (u_char*) &xp->sense; 4265 for (i=0; i<xp->req_sense_length; i++) 4266 printf (" %x", *p++); 4267 break; 4268 default: 4269 printf (" STAT: %x\n", cp->scsi_status); 4270 break; 4271 }; 4272 } else printf (" HOSTERROR: %x", cp->host_status); 4273 printf ("\n"); 4274 }; 4275 4276 /* 4277 ** Free this ccb 4278 */ 4279 ncr_free_ccb (np, cp, xp->flags); 4280 4281 /* 4282 ** signal completion to generic driver. 4283 */ 4284 scsi_done (xp); 4285} 4286 4287/*========================================================== 4288** 4289** 4290** Signal all (or one) control block done. 4291** 4292** 4293**========================================================== 4294*/ 4295 4296void ncr_wakeup (ncb_p np, u_long code) 4297{ 4298 /* 4299 ** Starting at the default ccb and following 4300 ** the links, complete all jobs with a 4301 ** host_status greater than "disconnect". 4302 ** 4303 ** If the "code" parameter is not zero, 4304 ** complete all jobs that are not IDLE. 4305 */ 4306 4307 ccb_p cp = &np->ccb; 4308 while (cp) { 4309 switch (cp->host_status) { 4310 4311 case HS_IDLE: 4312 break; 4313 4314 case HS_DISCONNECT: 4315 if(DEBUG_FLAGS & DEBUG_TINY) printf ("D"); 4316 /* fall through */ 4317 4318 case HS_BUSY: 4319 case HS_NEGOTIATE: 4320 if (!code) break; 4321 cp->host_status = code; 4322 4323 /* fall through */ 4324 4325 default: 4326 ncr_complete (np, cp); 4327 break; 4328 }; 4329 cp = cp -> link_ccb; 4330 }; 4331} 4332 4333/*========================================================== 4334** 4335** 4336** Start NCR chip. 4337** 4338** 4339**========================================================== 4340*/ 4341 4342void ncr_init (ncb_p np, char * msg, u_long code) 4343{ 4344 int i; 4345 u_long usrsync; 4346 u_char usrwide; 4347 u_char burstlen; 4348 4349 /* 4350 ** Reset chip. 4351 */ 4352 4353 OUTB (nc_istat, SRST); 4354 DELAY (1000); 4355 4356 /* 4357 ** Message. 4358 */ 4359 4360 if (msg) printf ("%s: restart (%s).\n", ncr_name (np), msg); 4361 4362 /* 4363 ** Clear Start Queue 4364 */ 4365 4366 for (i=0;i<MAX_START;i++) 4367 np -> squeue [i] = NCB_SCRIPT_PHYS (np, idle); 4368 4369 /* 4370 ** Start at first entry. 4371 */ 4372 4373 np->squeueput = 0; 4374 np->script->startpos[0] = NCB_SCRIPT_PHYS (np, tryloop); 4375 np->script->start0 [0] = SCR_INT ^ IFFALSE (0); 4376 4377 /* 4378 ** Wakeup all pending jobs. 4379 */ 4380 4381 ncr_wakeup (np, code); 4382 4383 /* 4384 ** Init chip. 4385 */ 4386 4387#ifndef __NetBSD__ 4388 if (pci_max_burst_len < 4) { 4389 static u_char tbl[4]={0,0,0x40,0x80}; 4390 burstlen = tbl[pci_max_burst_len]; 4391 } else burstlen = 0xc0; 4392#else /* !__NetBSD__ */ 4393 burstlen = 0xc0; 4394#endif /* __NetBSD__ */ 4395 4396 OUTB (nc_istat, 0 ); /* Remove Reset, abort ... */ 4397 OUTB (nc_scntl0, 0xca ); /* full arb., ena parity, par->ATN */ 4398 OUTB (nc_scntl1, 0x00 ); /* odd parity, and remove CRST!! */ 4399 OUTB (nc_scntl3, np->rv_scntl3);/* timing prescaler */ 4400 OUTB (nc_scid , RRE|np->myaddr);/* host adapter SCSI address */ 4401 OUTW (nc_respid, 1ul<<np->myaddr);/* id to respond to */ 4402 OUTB (nc_istat , SIGP ); /* Signal Process */ 4403 OUTB (nc_dmode , burstlen); /* Burst length = 2 .. 16 transfers */ 4404 OUTB (nc_dcntl , NOCOM ); /* no single step mode, protect SFBR*/ 4405 OUTB (nc_ctest4, 0x08 ); /* enable master parity checking */ 4406 OUTB (nc_stest2, EXT ); /* Extended Sreq/Sack filtering */ 4407 OUTB (nc_stest3, TE ); /* TolerANT enable */ 4408 OUTB (nc_stime0, 0x0b ); /* HTH = disabled, STO = 0.1 sec. */ 4409 4410 /* 4411 ** Reinitialize usrsync. 4412 ** Have to renegotiate synch mode. 4413 */ 4414 4415 usrsync = 255; 4416 if (SCSI_NCR_MAX_SYNC) { 4417 u_long period; 4418 period =1000000/SCSI_NCR_MAX_SYNC; /* ns = 10e6 / kHz */ 4419 if (period <= 11 * np->ns_sync) { 4420 if (period < 4 * np->ns_sync) 4421 usrsync = np->ns_sync; 4422 else 4423 usrsync = period / 4; 4424 }; 4425 }; 4426 4427 /* 4428 ** Reinitialize usrwide. 4429 ** Have to renegotiate wide mode. 4430 */ 4431 4432 usrwide = (SCSI_NCR_MAX_WIDE); 4433 if (usrwide > np->maxwide) usrwide=np->maxwide; 4434 4435 /* 4436 ** Disable disconnects. 4437 */ 4438 4439 np->disc = 0; 4440 4441 /* 4442 ** Fill in target structure. 4443 */ 4444 4445 for (i=0;i<MAX_TARGET;i++) { 4446 tcb_p tp = &np->target[i]; 4447 4448 tp->sval = 0; 4449 tp->wval = np->rv_scntl3; 4450 4451 tp->usrsync = usrsync; 4452 tp->usrwide = usrwide; 4453 4454 ncr_negotiate (np, tp); 4455 } 4456 4457 /* 4458 ** enable ints 4459 */ 4460 4461 OUTW (nc_sien , STO|HTH|MA|SGE|UDC|RST); 4462 OUTB (nc_dien , MDPE|BF|ABRT|SSI|SIR|IID); 4463 4464 /* 4465 ** Start script processor. 4466 */ 4467 4468 OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, start)); 4469} 4470 4471/*========================================================== 4472** 4473** Prepare the negotiation values for wide and 4474** synchronous transfers. 4475** 4476**========================================================== 4477*/ 4478 4479static void ncr_negotiate (struct ncb* np, struct tcb* tp) 4480{ 4481 /* 4482 ** minsync unit is 4ns ! 4483 */ 4484 4485 u_long minsync = tp->usrsync; 4486 4487 if (minsync < 25) minsync=25; 4488 4489 /* 4490 ** if not scsi 2 4491 ** don't believe FAST! 4492 */ 4493 4494 if ((minsync < 50) && (tp->inqdata[2] & 0x0f) < 2) 4495 minsync=50; 4496 4497 /* 4498 ** our limit .. 4499 */ 4500 4501 if (minsync < np->ns_sync) 4502 minsync = np->ns_sync; 4503 4504 /* 4505 ** divider limit 4506 */ 4507 4508 if (minsync > (np->ns_sync * 11) / 4) 4509 minsync = 255; 4510 4511 tp->minsync = minsync; 4512 tp->maxoffs = (minsync<255 ? 8 : 0); 4513 4514 /* 4515 ** period=0: has to negotiate sync transfer 4516 */ 4517 4518 tp->period=0; 4519 4520 /* 4521 ** widedone=0: has to negotiate wide transfer 4522 */ 4523 tp->widedone=0; 4524} 4525 4526/*========================================================== 4527** 4528** Switch sync mode for current job and it's target 4529** 4530**========================================================== 4531*/ 4532 4533static void ncr_setsync (ncb_p np, ccb_p cp, u_char sxfer) 4534{ 4535 struct scsi_xfer *xp; 4536 tcb_p tp; 4537 u_char target = INB (nc_ctest0)&7; 4538 4539 assert (cp); 4540 if (!cp) return; 4541 4542 xp = cp->xfer; 4543 assert (xp); 4544 if (!xp) return; 4545 assert (target == xp->sc_link->target & 7); 4546 4547 tp = &np->target[target]; 4548 tp->period= sxfer&0xf ? ((sxfer>>5)+4) * np->ns_sync : 0xffff; 4549 4550 if (tp->sval == sxfer) return; 4551 tp->sval = sxfer; 4552 4553 /* 4554 ** Bells and whistles ;-) 4555 */ 4556 PRINT_ADDR(xp); 4557 if (sxfer & 0x0f) { 4558 /* 4559 ** Disable extended Sreq/Sack filtering 4560 */ 4561 if (tp->period <= 200) OUTB (nc_stest2, 0); 4562 printf ("%s%dns (%d Mb/sec) offset %d.\n", 4563 tp->period<200 ? "FAST SCSI-2 ":"", 4564 tp->period, (1000+tp->period/2)/tp->period, 4565 sxfer & 0x0f); 4566 } else printf ("asynchronous.\n"); 4567 4568 /* 4569 ** set actual value and sync_status 4570 */ 4571 OUTB (nc_sxfer, sxfer); 4572 np->sync_st = sxfer; 4573 4574 /* 4575 ** patch ALL ccbs of this target. 4576 */ 4577 for (cp = &np->ccb; cp; cp = cp->link_ccb) { 4578 if (!cp->xfer) continue; 4579 if (cp->xfer->sc_link->target != target) continue; 4580 cp->sync_status = sxfer; 4581 }; 4582} 4583 4584/*========================================================== 4585** 4586** Switch wide mode for current job and it's target 4587** 4588**========================================================== 4589*/ 4590 4591static void ncr_setwide (ncb_p np, ccb_p cp, u_char wide) 4592{ 4593 struct scsi_xfer *xp; 4594 u_short target = INB (nc_ctest0)&7; 4595 tcb_p tp; 4596 u_char scntl3 = np->rv_scntl3 | (wide ? EWS : 0); 4597 4598 assert (cp); 4599 if (!cp) return; 4600 4601 xp = cp->xfer; 4602 assert (xp); 4603 if (!xp) return; 4604 assert (target == xp->sc_link->target & 7); 4605 4606 tp = &np->target[target]; 4607 tp->widedone = wide+1; 4608 if (tp->wval == scntl3) return; 4609 tp->wval = scntl3; 4610 4611 /* 4612 ** Bells and whistles ;-) 4613 */ 4614 PRINT_ADDR(xp); 4615 if (scntl3 & EWS) 4616 printf ("WIDE SCSI (16 bit) enabled.\n"); 4617 else 4618 printf ("WIDE SCSI disabled.\n"); 4619 4620 /* 4621 ** set actual value and sync_status 4622 */ 4623 OUTB (nc_scntl3, scntl3); 4624 np->wide_st = scntl3; 4625 4626 /* 4627 ** patch ALL ccbs of this target. 4628 */ 4629 for (cp = &np->ccb; cp; cp = cp->link_ccb) { 4630 if (!cp->xfer) continue; 4631 if (cp->xfer->sc_link->target != target) continue; 4632 cp->wide_status = scntl3; 4633 }; 4634} 4635 4636/*========================================================== 4637** 4638** Switch tagged mode for a target. 4639** 4640**========================================================== 4641*/ 4642 4643static void ncr_setmaxtags (tcb_p tp, u_long usrtags) 4644{ 4645 int l; 4646 tp->usrtags = usrtags; 4647 for (l=0; l<MAX_LUN; l++) { 4648 lcb_p lp; 4649 if (!tp) break; 4650 lp=tp->lp[l]; 4651 if (!lp) continue; 4652 ncr_settags (tp, lp); 4653 }; 4654} 4655 4656static void ncr_settags (tcb_p tp, lcb_p lp) 4657{ 4658 u_char reqtags, tmp; 4659 4660 if ((!tp) || (!lp)) return; 4661 4662 /* 4663 ** only devices capable of tagges commands 4664 ** only disk devices 4665 ** only if enabled by user .. 4666 */ 4667 if ((tp->inqdata[7] & INQ7_QUEUE) == 0) { 4668 tp->usrtags=0; 4669 } 4670 if (tp->usrtags && ((tp->inqdata[0] & 0x1f) == 0x00)) { 4671 reqtags = tp->usrtags; 4672 if (lp->actlink <= 1) 4673 lp->usetags=reqtags; 4674 } else { 4675 reqtags = 1; 4676 if (lp->actlink <= 1) 4677 lp->usetags=0; 4678 }; 4679 4680 /* 4681 ** don't announce more than available. 4682 */ 4683 tmp = lp->actccbs; 4684 if (tmp > reqtags) tmp = reqtags; 4685 lp->reqlink = tmp; 4686 4687 /* 4688 ** don't discard if announced. 4689 */ 4690 tmp = lp->actlink; 4691 if (tmp < reqtags) tmp = reqtags; 4692 lp->reqccbs = tmp; 4693} 4694 4695/*---------------------------------------------------- 4696** 4697** handle user commands 4698** 4699**---------------------------------------------------- 4700*/ 4701 4702static void ncr_usercmd (ncb_p np) 4703{ 4704 u_char t; 4705 tcb_p tp; 4706 4707 switch (np->user.cmd) { 4708 4709 case 0: return; 4710 4711 case UC_SETSYNC: 4712 for (t=0; t<MAX_TARGET; t++) { 4713 if (!((np->user.target>>t)&1)) continue; 4714 tp = &np->target[t]; 4715 tp->usrsync = np->user.data; 4716 ncr_negotiate (np, tp); 4717 }; 4718 break; 4719 4720 case UC_SETTAGS: 4721 if (np->user.data > MAX_TAGS) 4722 break; 4723 for (t=0; t<MAX_TARGET; t++) { 4724 if (!((np->user.target>>t)&1)) continue; 4725 ncr_setmaxtags (&np->target[t], np->user.data); 4726 }; 4727 break; 4728 4729 case UC_SETDEBUG: 4730 ncr_debug = np->user.data; 4731 break; 4732 4733 case UC_SETORDER: 4734 np->order = np->user.data; 4735 break; 4736 4737 case UC_SETWIDE: 4738 for (t=0; t<MAX_TARGET; t++) { 4739 u_long size; 4740 if (!((np->user.target>>t)&1)) continue; 4741 tp = &np->target[t]; 4742 size = np->user.data; 4743 if (size > np->maxwide) size=np->maxwide; 4744 tp->usrwide = size; 4745 ncr_negotiate (np, tp); 4746 }; 4747 break; 4748 4749 case UC_SETFLAG: 4750 for (t=0; t<MAX_TARGET; t++) { 4751 if (!((np->user.target>>t)&1)) continue; 4752 tp = &np->target[t]; 4753 tp->usrflag = np->user.data; 4754 }; 4755 break; 4756 } 4757 np->user.cmd=0; 4758} 4759 4760 4761 4762 4763/*========================================================== 4764** 4765** 4766** ncr timeout handler. 4767** 4768** 4769**========================================================== 4770** 4771** Misused to keep the driver running when 4772** interrupts are not configured correctly. 4773** 4774**---------------------------------------------------------- 4775*/ 4776 4777static void ncr_timeout (ncb_p np) 4778{ 4779 u_long thistime = time.tv_sec; 4780 u_long step = np->ticks; 4781 u_long count = 0; 4782 long signed t; 4783 ccb_p cp; 4784 4785 if (np->lasttime != thistime) { 4786 /* 4787 ** block ncr interrupts 4788 */ 4789 int oldspl = splbio(); 4790 np->lasttime = thistime; 4791 4792 ncr_usercmd (np); 4793 4794 /*---------------------------------------------------- 4795 ** 4796 ** handle ncr chip timeouts 4797 ** 4798 ** Assumption: 4799 ** We have a chance to arbitrate for the 4800 ** SCSI bus at least every 10 seconds. 4801 ** 4802 **---------------------------------------------------- 4803 */ 4804 4805 t = thistime - np->heartbeat; 4806 4807 if (t<2) np->latetime=0; else np->latetime++; 4808 4809 if (np->latetime>2) { 4810 /* 4811 ** If there are no requests, the script 4812 ** processor will sleep on SEL_WAIT_RESEL. 4813 ** But we have to check whether it died. 4814 ** Let's wake it up. 4815 */ 4816 OUTB (nc_istat, SIGP); 4817 }; 4818 4819 if (np->latetime>4) { 4820 /* 4821 ** Although we tried to wake it up, 4822 ** the script processor didn't respond. 4823 ** 4824 ** May be a target is hanging, 4825 ** or another initator lets a tape device 4826 ** rewind with disconnect disabled :-( 4827 ** 4828 ** We won't accept that. 4829 */ 4830 if (INB (nc_sbcl) & CBSY) 4831 OUTB (nc_scntl1, CRST); 4832 DELAY (1000); 4833 ncr_init (np, "ncr dead ?", HS_TIMEOUT); 4834 np->heartbeat = thistime; 4835 }; 4836 4837 /*---------------------------------------------------- 4838 ** 4839 ** handle ccb timeouts 4840 ** 4841 **---------------------------------------------------- 4842 */ 4843 4844 for (cp=&np->ccb; cp; cp=cp->link_ccb) { 4845 /* 4846 ** look for timed out ccbs. 4847 */ 4848 if (!cp->host_status) continue; 4849 count++; 4850 if (cp->tlimit > thistime) continue; 4851 4852 /* 4853 ** Disable reselect. 4854 ** Remove it from startqueue. 4855 */ 4856 cp->jump_ccb.l_cmd = (SCR_JUMP); 4857 if (cp->phys.header.launch.l_paddr == 4858 NCB_SCRIPT_PHYS (np, select)) { 4859 printf ("%s: timeout ccb=%x (skip)\n", 4860 ncr_name (np), (unsigned)cp); 4861 cp->phys.header.launch.l_paddr 4862 = NCB_SCRIPT_PHYS (np, skip); 4863 }; 4864 4865 switch (cp->host_status) { 4866 4867 case HS_BUSY: 4868 case HS_NEGOTIATE: 4869 /* 4870 ** still in start queue ? 4871 */ 4872 if (cp->phys.header.launch.l_paddr == 4873 NCB_SCRIPT_PHYS (np, skip)) 4874 continue; 4875 4876 /* fall through */ 4877 case HS_DISCONNECT: 4878 cp->host_status=HS_TIMEOUT; 4879 }; 4880 cp->tag = 0; 4881 4882 /* 4883 ** wakeup this ccb. 4884 */ 4885 ncr_complete (np, cp); 4886 }; 4887 splx (oldspl); 4888 } 4889 4890 timeout (TIMEOUT ncr_timeout, (caddr_t) np, step ? step : 1); 4891 4892 if (INB(nc_istat) & (INTF|SIP|DIP)) { 4893 4894 /* 4895 ** Process pending interrupts. 4896 */ 4897 4898 int oldspl = splbio (); 4899 if (DEBUG_FLAGS & DEBUG_TINY) printf ("{"); 4900 ncr_exception (np); 4901 if (DEBUG_FLAGS & DEBUG_TINY) printf ("}"); 4902 splx (oldspl); 4903 }; 4904} 4905 4906/*========================================================== 4907** 4908** 4909** ncr chip exception handler. 4910** 4911** 4912**========================================================== 4913*/ 4914 4915void ncr_exception (ncb_p np) 4916{ 4917 u_char istat, dstat; 4918 u_short sist; 4919 u_long dsp, dsa; 4920 int i, script_ofs; 4921 4922 /* 4923 ** interrupt on the fly ? 4924 */ 4925 while ((istat = INB (nc_istat)) & INTF) { 4926 if (DEBUG_FLAGS & DEBUG_TINY) printf ("F"); 4927 OUTB (nc_istat, INTF); 4928 np->profile.num_fly++; 4929 ncr_wakeup (np, 0); 4930 }; 4931 4932 if (!(istat & (SIP|DIP))) return; 4933 4934 /* 4935 ** Steinbach's Guideline for Systems Programming: 4936 ** Never test for an error condition you don't know how to handle. 4937 */ 4938 4939 dstat = INB (nc_dstat); 4940 sist = INW (nc_sist) ; 4941 np->profile.num_int++; 4942 4943 if (DEBUG_FLAGS & DEBUG_TINY) 4944 printf ("<%d|%x:%x|%x:%x>", 4945 INB(nc_scr0), 4946 dstat,sist, 4947 (unsigned)INL(nc_dsp), 4948 (unsigned)INL(nc_dbc)); 4949 if ((dstat==DFE) && (sist==PAR)) return; 4950 4951/*========================================================== 4952** 4953** First the normal cases. 4954** 4955**========================================================== 4956*/ 4957 /*------------------------------------------- 4958 ** SCSI reset 4959 **------------------------------------------- 4960 */ 4961 4962 if (sist & RST) { 4963 ncr_init (np, bootverbose ? "scsi reset" : NULL, HS_RESET); 4964 return; 4965 }; 4966 4967 /*------------------------------------------- 4968 ** selection timeout 4969 ** 4970 ** IID excluded from dstat mask! 4971 ** (chip bug) 4972 **------------------------------------------- 4973 */ 4974 4975 if ((sist & STO) && 4976 !(sist & (GEN|HTH|MA|SGE|UDC|RST|PAR)) && 4977 !(dstat & (MDPE|BF|ABRT|SIR))) { 4978 ncr_int_sto (np); 4979 return; 4980 }; 4981 4982 /*------------------------------------------- 4983 ** Phase mismatch. 4984 **------------------------------------------- 4985 */ 4986 4987 if ((sist & MA) && 4988 !(sist & (STO|GEN|HTH|SGE|UDC|RST|PAR)) && 4989 !(dstat & (MDPE|BF|ABRT|SIR|IID))) { 4990 ncr_int_ma (np); 4991 return; 4992 }; 4993 4994 /*---------------------------------------- 4995 ** move command with length 0 4996 **---------------------------------------- 4997 */ 4998 4999 if ((dstat & IID) && 5000 !(sist & (STO|GEN|HTH|MA|SGE|UDC|RST|PAR)) && 5001 !(dstat & (MDPE|BF|ABRT|SIR)) && 5002 ((INL(nc_dbc) & 0xf8000000) == SCR_MOVE_TBL)) { 5003 /* 5004 ** Target wants more data than available. 5005 ** The "no_data" script will do it. 5006 */ 5007 OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, no_data)); 5008 return; 5009 }; 5010 5011 /*------------------------------------------- 5012 ** Programmed interrupt 5013 **------------------------------------------- 5014 */ 5015 5016 if ((dstat & SIR) && 5017 !(sist & (STO|GEN|HTH|MA|SGE|UDC|RST|PAR)) && 5018 !(dstat & (MDPE|BF|ABRT|IID)) && 5019 (INB(nc_dsps) <= SIR_MAX)) { 5020 ncr_int_sir (np); 5021 return; 5022 }; 5023 5024 /*======================================== 5025 ** do the register dump 5026 **======================================== 5027 */ 5028 5029 if (time.tv_sec - np->regtime.tv_sec>10) { 5030 int i; 5031 np->regtime = time; 5032 for (i=0; i<sizeof(np->regdump); i++) 5033 ((char*)&np->regdump)[i] = ((char*)np->reg)[i]; 5034 np->regdump.nc_dstat = dstat; 5035 np->regdump.nc_sist = sist; 5036 }; 5037 5038 /*========================================= 5039 ** log message for real hard errors 5040 **========================================= 5041 5042 "ncr0 targ 0?: ERROR (ds:si) (so-si-sd) (sxfer/scntl3) @ (dsp:dbc)." 5043 " reg: r0 r1 r2 r3 r4 r5 r6 ..... rf." 5044 5045 exception register: 5046 ds: dstat 5047 si: sist 5048 5049 SCSI bus lines: 5050 so: control lines as driver by NCR. 5051 si: control lines as seen by NCR. 5052 sd: scsi data lines as seen by NCR. 5053 5054 wide/fastmode: 5055 sxfer: (see the manual) 5056 scntl3: (see the manual) 5057 5058 current script command: 5059 dsp: script adress (relative to start of script). 5060 dbc: first word of script command. 5061 5062 First 16 register of the chip: 5063 r0..rf 5064 5065 ============================================= 5066 */ 5067 5068 dsp = (unsigned) INL (nc_dsp); 5069 dsa = (unsigned) INL (nc_dsa); 5070 5071 script_ofs = dsp - np->p_script; 5072 5073 printf ("%s:%d: ERROR (%x:%x) (%x-%x-%x) (%x/%x) @ (%x:%08x).\n", 5074 ncr_name (np), INB (nc_ctest0)&0x0f, dstat, sist, 5075 INB (nc_socl), INB (nc_sbcl), INB (nc_sbdl), 5076 INB (nc_sxfer),INB (nc_scntl3), script_ofs, 5077 (unsigned) INL (nc_dbc)); 5078 5079 if (((script_ofs & 3) == 0) && 5080 (unsigned)script_ofs < sizeof(struct script)) { 5081 printf ("\tscript cmd = %08x\n", 5082 *(ncrcmd *)((char*)np->script +script_ofs)); 5083 } 5084 5085 printf ("\treg:\t"); 5086 for (i=0; i<16;i++) 5087 printf (" %02x", ((u_char*)np->reg)[i]); 5088 printf (".\n"); 5089 5090 /*---------------------------------------- 5091 ** clean up the dma fifo 5092 **---------------------------------------- 5093 */ 5094 5095 if ( (INB(nc_sstat0) & (ILF|ORF|OLF) ) || 5096 (INB(nc_sstat1) & (FF3210) ) || 5097 (INB(nc_sstat2) & (ILF1|ORF1|OLF1)) || /* wide .. */ 5098 !(dstat & DFE)) { 5099 printf ("%s: have to clear fifos.\n", ncr_name (np)); 5100 OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */ 5101 OUTB (nc_ctest3, CLF); /* clear dma fifo */ 5102 } 5103 5104 /*---------------------------------------- 5105 ** handshake timeout 5106 **---------------------------------------- 5107 */ 5108 5109 if (sist & HTH) { 5110 printf ("%s: handshake timeout\n", ncr_name(np)); 5111 OUTB (nc_scntl1, CRST); 5112 DELAY (1000); 5113 OUTB (nc_scntl1, 0x00); 5114 OUTB (nc_scr0, HS_FAIL); 5115 OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, cleanup)); 5116 return; 5117 } 5118 5119 /*---------------------------------------- 5120 ** unexpected disconnect 5121 **---------------------------------------- 5122 */ 5123 5124 if ((sist & UDC) && 5125 !(sist & (STO|GEN|HTH|MA|SGE|RST|PAR)) && 5126 !(dstat & (MDPE|BF|ABRT|SIR|IID))) { 5127 OUTB (nc_scr0, HS_UNEXPECTED); 5128 OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, cleanup)); 5129 return; 5130 }; 5131 5132 /*---------------------------------------- 5133 ** cannot disconnect 5134 **---------------------------------------- 5135 */ 5136 5137 if ((dstat & IID) && 5138 !(sist & (STO|GEN|HTH|MA|SGE|UDC|RST|PAR)) && 5139 !(dstat & (MDPE|BF|ABRT|SIR)) && 5140 ((INL(nc_dbc) & 0xf8000000) == SCR_WAIT_DISC)) { 5141 /* 5142 ** Unexpected data cycle while waiting for disconnect. 5143 */ 5144 if (INB(nc_sstat2) & LDSC) { 5145 /* 5146 ** It's an early reconnect. 5147 ** Let's continue ... 5148 */ 5149 OUTB (nc_dcntl, (STD|NOCOM)); 5150 /* 5151 ** info message 5152 */ 5153 printf ("%s: INFO: LDSC while IID.\n", 5154 ncr_name (np)); 5155 return; 5156 }; 5157 printf ("%s: target %d doesn't release the bus.\n", 5158 ncr_name (np), INB (nc_ctest0)&0x0f); 5159 /* 5160 ** return without restarting the NCR. 5161 ** timeout will do the real work. 5162 */ 5163 return; 5164 }; 5165 5166 /*---------------------------------------- 5167 ** single step 5168 **---------------------------------------- 5169 */ 5170 5171 if ((dstat & SSI) && 5172 !(sist & (STO|GEN|HTH|MA|SGE|UDC|RST|PAR)) && 5173 !(dstat & (MDPE|BF|ABRT|SIR|IID))) { 5174 OUTB (nc_dcntl, (STD|NOCOM)); 5175 return; 5176 }; 5177 5178/* 5179** @RECOVER@ HTH, SGE, ABRT. 5180** 5181** We should try to recover from these interrupts. 5182** They may occur if there are problems with synch transfers, or 5183** if targets are switched on or off while the driver is running. 5184*/ 5185 5186 if (sist & SGE) { 5187 OUTB (nc_ctest3, CLF); /* clear scsi offsets */ 5188 } 5189 5190 /* 5191 ** Freeze controller to be able to read the messages. 5192 */ 5193 5194 if (DEBUG_FLAGS & DEBUG_FREEZE) { 5195 int i; 5196 unsigned char val; 5197 for (i=0; i<0x60; i++) { 5198 switch (i%16) { 5199 5200 case 0: 5201 printf ("%s: reg[%d0]: ", 5202 ncr_name(np),i/16); 5203 break; 5204 case 4: 5205 case 8: 5206 case 12: 5207 printf (" "); 5208 break; 5209 }; 5210 val = ((unsigned char*) np->vaddr) [i]; 5211 printf (" %x%x", val/16, val%16); 5212 if (i%16==15) printf (".\n"); 5213 }; 5214 5215 untimeout (TIMEOUT ncr_timeout, (caddr_t) np); 5216 5217 printf ("%s: halted!\n", ncr_name(np)); 5218 /* 5219 ** don't restart controller ... 5220 */ 5221 OUTB (nc_istat, SRST); 5222 return; 5223 }; 5224 5225#ifdef NCR_FREEZE 5226 /* 5227 ** Freeze system to be able to read the messages. 5228 */ 5229 printf ("ncr: fatal error: system halted - press reset to reboot ..."); 5230 (void) splhigh(); 5231 for (;;); 5232#endif 5233 5234 /* 5235 ** sorry, have to kill ALL jobs ... 5236 */ 5237 5238 ncr_init (np, "fatal error", HS_FAIL); 5239} 5240 5241/*========================================================== 5242** 5243** ncr chip exception handler for selection timeout 5244** 5245**========================================================== 5246** 5247** There seems to be a bug in the 53c810. 5248** Although a STO-Interrupt is pending, 5249** it continues executing script commands. 5250** But it will fail and interrupt (IID) on 5251** the next instruction where it's looking 5252** for a valid phase. 5253** 5254**---------------------------------------------------------- 5255*/ 5256 5257void ncr_int_sto (ncb_p np) 5258{ 5259 u_long dsa, scratcha, diff; 5260 ccb_p cp; 5261 if (DEBUG_FLAGS & DEBUG_TINY) printf ("T"); 5262 5263 /* 5264 ** look for ccb and set the status. 5265 */ 5266 5267 dsa = INL (nc_dsa); 5268 cp = &np->ccb; 5269 while (cp && (CCB_PHYS (cp, phys) != dsa)) 5270 cp = cp->link_ccb; 5271 5272 if (cp) { 5273 cp-> host_status = HS_SEL_TIMEOUT; 5274 ncr_complete (np, cp); 5275 }; 5276 5277 /* 5278 ** repair start queue 5279 */ 5280 5281 scratcha = INL (nc_scratcha); 5282 diff = scratcha - NCB_SCRIPT_PHYS (np, tryloop); 5283 5284/* assert ((diff <= MAX_START * 20) && !(diff % 20));*/ 5285 5286 if ((diff <= MAX_START * 20) && !(diff % 20)) { 5287 np->script->startpos[0] = scratcha; 5288 OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, start)); 5289 return; 5290 }; 5291 ncr_init (np, "selection timeout", HS_FAIL); 5292} 5293 5294/*========================================================== 5295** 5296** 5297** ncr chip exception handler for phase errors. 5298** 5299** 5300**========================================================== 5301** 5302** We have to construct a new transfer descriptor, 5303** to transfer the rest of the current block. 5304** 5305**---------------------------------------------------------- 5306*/ 5307 5308static void ncr_int_ma (ncb_p np) 5309{ 5310 u_long dbc; 5311 u_long rest; 5312 u_long dsa; 5313 u_long dsp; 5314 u_long nxtdsp; 5315 u_long *vdsp; 5316 u_long oadr, olen; 5317 u_long *tblp, *newcmd; 5318 u_char cmd, sbcl, delta, ss0, ss2; 5319 ccb_p cp; 5320 5321 dsp = INL (nc_dsp); 5322 dsa = INL (nc_dsa); 5323 dbc = INL (nc_dbc); 5324 ss0 = INB (nc_sstat0); 5325 ss2 = INB (nc_sstat2); 5326 sbcl= INB (nc_sbcl); 5327 5328 cmd = dbc >> 24; 5329 rest= dbc & 0xffffff; 5330 delta=(INB (nc_dfifo) - rest) & 0x7f; 5331 5332 /* 5333 ** The data in the dma fifo has not been transfered to 5334 ** the target -> add the amount to the rest 5335 ** and clear the data. 5336 ** Check the sstat2 register in case of wide transfer. 5337 */ 5338 5339 if (! (INB(nc_dstat) & DFE)) rest += delta; 5340 if (ss0 & OLF) rest++; 5341 if (ss0 & ORF) rest++; 5342 if (INB(nc_scntl3) & EWS) { 5343 if (ss2 & OLF1) rest++; 5344 if (ss2 & ORF1) rest++; 5345 }; 5346 OUTB (nc_ctest3, CLF ); /* clear dma fifo */ 5347 OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */ 5348 5349 /* 5350 ** locate matching cp 5351 */ 5352 dsa = INL (nc_dsa); 5353 cp = &np->ccb; 5354 while (cp && (CCB_PHYS (cp, phys) != dsa)) 5355 cp = cp->link_ccb; 5356 5357 if (!cp) { 5358 printf ("%s: SCSI phase error fixup: CCB already dequeued (0x%08lx)\n", 5359 ncr_name (np), (u_long) np->header.cp); 5360 return; 5361 } 5362 if (cp != np->header.cp) { 5363 printf ("%s: SCSI phase error fixup: CCB address mismatch (0x%08lx != 0x%08lx) np.ccb = 0x%08lx\n", 5364 ncr_name (np), (u_long) cp, (u_long) np->header.cp, &np->ccb); 5365/* return;*/ 5366 } 5367 5368 /* 5369 ** find the interrupted script command, 5370 ** and the address at which to continue. 5371 */ 5372 5373 if (dsp == vtophys (&cp->patch[2])) { 5374 vdsp = &cp->patch[0]; 5375 nxtdsp = vdsp[3]; 5376 } else if (dsp == vtophys (&cp->patch[6])) { 5377 vdsp = &cp->patch[4]; 5378 nxtdsp = vdsp[3]; 5379 } else { 5380 vdsp = (u_long*) ((char*)np->script - np->p_script + dsp -8); 5381 nxtdsp = dsp; 5382 }; 5383 5384 /* 5385 ** log the information 5386 */ 5387 if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_PHASE)) { 5388 printf ("P%x%x ",cmd&7, sbcl&7); 5389 printf ("RL=%d D=%d SS0=%x ", 5390 (unsigned) rest, (unsigned) delta, ss0); 5391 }; 5392 if (DEBUG_FLAGS & DEBUG_PHASE) { 5393 printf ("\nCP=%x CP2=%x DSP=%x NXT=%x VDSP=%x CMD=%x ", 5394 (unsigned)cp, (unsigned)np->header.cp, 5395 (unsigned)dsp, 5396 (unsigned)nxtdsp, (unsigned)vdsp, cmd); 5397 }; 5398 5399 /* 5400 ** get old startaddress and old length. 5401 */ 5402 5403 oadr = vdsp[1]; 5404 5405 if (cmd & 0x10) { /* Table indirect */ 5406 tblp = (u_long*) ((char*) &cp->phys + oadr); 5407 olen = tblp[0]; 5408 oadr = tblp[1]; 5409 } else { 5410 tblp = (u_long*) 0; 5411 olen = vdsp[0] & 0xffffff; 5412 }; 5413 5414 if (DEBUG_FLAGS & DEBUG_PHASE) { 5415 printf ("OCMD=%x\nTBLP=%x OLEN=%x OADR=%x\n", 5416 (unsigned) (vdsp[0] >> 24), 5417 (unsigned) tblp, 5418 (unsigned) olen, 5419 (unsigned) oadr); 5420 }; 5421 5422 /* 5423 ** if old phase not dataphase, leave here. 5424 */ 5425 5426 if (cmd != (vdsp[0] >> 24)) { 5427 PRINT_ADDR(cp->xfer); 5428 printf ("internal error: cmd=%02x != %02x=(vdsp[0] >> 24)\n", 5429 (unsigned)cmd, (unsigned)vdsp[0] >> 24); 5430 5431 return; 5432 } 5433 if (cmd & 0x06) { 5434 PRINT_ADDR(cp->xfer); 5435 printf ("phase change %x-%x %d@%08x resid=%d.\n", 5436 cmd&7, sbcl&7, (unsigned)olen, 5437 (unsigned)oadr, (unsigned)rest); 5438 5439 OUTB (nc_dcntl, (STD|NOCOM)); 5440 return; 5441 }; 5442 5443 /* 5444 ** choose the correct patch area. 5445 ** if savep points to one, choose the other. 5446 */ 5447 5448 newcmd = cp->patch; 5449 if (cp->phys.header.savep == vtophys (newcmd)) newcmd+=4; 5450 5451 /* 5452 ** fillin the commands 5453 */ 5454 5455 newcmd[0] = ((cmd & 0x0f) << 24) | rest; 5456 newcmd[1] = oadr + olen - rest; 5457 newcmd[2] = SCR_JUMP; 5458 newcmd[3] = nxtdsp; 5459 5460 if (DEBUG_FLAGS & DEBUG_PHASE) { 5461 PRINT_ADDR(cp->xfer); 5462 printf ("newcmd[%d] %x %x %x %x.\n", 5463 newcmd - cp->patch, 5464 (unsigned)newcmd[0], 5465 (unsigned)newcmd[1], 5466 (unsigned)newcmd[2], 5467 (unsigned)newcmd[3]); 5468 } 5469 /* 5470 ** fake the return address (to the patch). 5471 ** and restart script processor at dispatcher. 5472 */ 5473 np->profile.num_break++; 5474 OUTL (nc_temp, vtophys (newcmd)); 5475 OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, dispatch)); 5476} 5477 5478/*========================================================== 5479** 5480** 5481** ncr chip exception handler for programmed interrupts. 5482** 5483** 5484**========================================================== 5485*/ 5486 5487static int ncr_show_msg (u_char * msg) 5488{ 5489 u_char i; 5490 printf ("%x",*msg); 5491 if (*msg==M_EXTENDED) { 5492 for (i=1;i<8;i++) { 5493 if (i-1>msg[1]) break; 5494 printf ("-%x",msg[i]); 5495 }; 5496 return (i+1); 5497 } else if ((*msg & 0xf0) == 0x20) { 5498 printf ("-%x",msg[1]); 5499 return (2); 5500 }; 5501 return (1); 5502} 5503 5504void ncr_int_sir (ncb_p np) 5505{ 5506 u_char chg, ofs, per, fak, wide; 5507 u_char num = INB (nc_dsps); 5508 ccb_p cp=0; 5509 u_long dsa; 5510 u_char target = INB (nc_ctest0) & 7; 5511 tcb_p tp = &np->target[target]; 5512 int i; 5513 if (DEBUG_FLAGS & DEBUG_TINY) printf ("I#%d", num); 5514 5515 switch (num) { 5516 case SIR_SENSE_RESTART: 5517 case SIR_STALL_RESTART: 5518 break; 5519 5520 default: 5521 /* 5522 ** lookup the ccb 5523 */ 5524 dsa = INL (nc_dsa); 5525 cp = &np->ccb; 5526 while (cp && (CCB_PHYS (cp, phys) != dsa)) 5527 cp = cp->link_ccb; 5528 5529 assert (cp); 5530 if (!cp) 5531 goto out; 5532 assert (cp == np->header.cp); 5533 if (cp != np->header.cp) 5534 goto out; 5535 } 5536 5537 switch (num) { 5538 5539/*-------------------------------------------------------------------- 5540** 5541** Processing of interrupted getcc selects 5542** 5543**-------------------------------------------------------------------- 5544*/ 5545 5546 case SIR_SENSE_RESTART: 5547 /*------------------------------------------ 5548 ** Script processor is idle. 5549 ** Look for interrupted "check cond" 5550 **------------------------------------------ 5551 */ 5552 5553 if (DEBUG_FLAGS & DEBUG_RESTART) 5554 printf ("%s: int#%d",ncr_name (np),num); 5555 cp = (ccb_p) 0; 5556 for (i=0; i<MAX_TARGET; i++) { 5557 if (DEBUG_FLAGS & DEBUG_RESTART) printf (" t%d", i); 5558 tp = &np->target[i]; 5559 if (DEBUG_FLAGS & DEBUG_RESTART) printf ("+"); 5560 cp = tp->hold_cp; 5561 if (!cp) continue; 5562 if (DEBUG_FLAGS & DEBUG_RESTART) printf ("+"); 5563 if ((cp->host_status==HS_BUSY) && 5564 (cp->scsi_status==S_CHECK_COND)) 5565 break; 5566 if (DEBUG_FLAGS & DEBUG_RESTART) printf ("- (remove)"); 5567 tp->hold_cp = cp = (ccb_p) 0; 5568 }; 5569 5570 if (cp) { 5571 if (DEBUG_FLAGS & DEBUG_RESTART) 5572 printf ("+ restart job ..\n"); 5573 OUTL (nc_dsa, CCB_PHYS (cp, phys)); 5574 OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, getcc)); 5575 return; 5576 }; 5577 5578 /* 5579 ** no job, resume normal processing 5580 */ 5581 if (DEBUG_FLAGS & DEBUG_RESTART) printf (" -- remove trap\n"); 5582 np->script->start0[0] = SCR_INT ^ IFFALSE (0); 5583 break; 5584 5585 case SIR_SENSE_FAILED: 5586 /*------------------------------------------- 5587 ** While trying to select for 5588 ** getting the condition code, 5589 ** a target reselected us. 5590 **------------------------------------------- 5591 */ 5592 if (DEBUG_FLAGS & DEBUG_RESTART) { 5593 PRINT_ADDR(cp->xfer); 5594 printf ("in getcc reselect by t%d.\n", 5595 INB(nc_ssid) & 0x0f); 5596 } 5597 5598 /* 5599 ** Mark this job 5600 */ 5601 cp->host_status = HS_BUSY; 5602 cp->scsi_status = S_CHECK_COND; 5603 np->target[cp->xfer->sc_link->target].hold_cp = cp; 5604 5605 /* 5606 ** And patch code to restart it. 5607 */ 5608 np->script->start0[0] = SCR_INT; 5609 break; 5610 5611/*----------------------------------------------------------------------------- 5612** 5613** Was Sie schon immer ueber transfermode negotiation wissen wollten ... 5614** 5615** We try to negotiate sync and wide transfer only after 5616** a successfull inquire command. We look at byte 7 of the 5617** inquire data to determine the capabilities if the target. 5618** 5619** When we try to negotiate, we append the negotiation message 5620** to the identify and (maybe) simple tag message. 5621** The host status field is set to HS_NEGOTIATE to mark this 5622** situation. 5623** 5624** If the target doesn't answer this message immidiately 5625** (as required by the standard), the SIR_NEGO_FAIL interrupt 5626** will be raised eventually. 5627** The handler removes the HS_NEGOTIATE status, and sets the 5628** negotiated value to the default (async / nowide). 5629** 5630** If we receive a matching answer immediately, we check it 5631** for validity, and set the values. 5632** 5633** If we receive a Reject message immediately, we assume the 5634** negotiation has failed, and fall back to standard values. 5635** 5636** If we receive a negotiation message while not in HS_NEGOTIATE 5637** state, it's a target initiated negotiation. We prepare a 5638** (hopefully) valid answer, set our parameters, and send back 5639** this answer to the target. 5640** 5641** If the target doesn't fetch the answer (no message out phase), 5642** we assume the negotiation has failed, and fall back to default 5643** settings. 5644** 5645** When we set the values, we adjust them in all ccbs belonging 5646** to this target, in the controller's register, and in the "phys" 5647** field of the controller's struct ncb. 5648** 5649** Possible cases: hs sir msg_in value send goto 5650** We try try to negotiate: 5651** -> target doesnt't msgin NEG FAIL noop defa. - dispatch 5652** -> target rejected our msg NEG FAIL reject defa. - dispatch 5653** -> target answered (ok) NEG SYNC sdtr set - clrack 5654** -> target answered (!ok) NEG SYNC sdtr defa. REJ--->msg_bad 5655** -> target answered (ok) NEG WIDE wdtr set - clrack 5656** -> target answered (!ok) NEG WIDE wdtr defa. REJ--->msg_bad 5657** -> any other msgin NEG FAIL noop defa. - dispatch 5658** 5659** Target tries to negotiate: 5660** -> incoming message --- SYNC sdtr set SDTR - 5661** -> incoming message --- WIDE wdtr set WDTR - 5662** We sent our answer: 5663** -> target doesn't msgout --- PROTO ? defa. - dispatch 5664** 5665**----------------------------------------------------------------------------- 5666*/ 5667 5668 case SIR_NEGO_FAILED: 5669 /*------------------------------------------------------- 5670 ** 5671 ** Negotiation failed. 5672 ** Target doesn't send an answer message, 5673 ** or target rejected our message. 5674 ** 5675 ** Remove negotiation request. 5676 ** 5677 **------------------------------------------------------- 5678 */ 5679 OUTB (HS_PRT, HS_BUSY); 5680 5681 /* fall through */ 5682 5683 case SIR_NEGO_PROTO: 5684 /*------------------------------------------------------- 5685 ** 5686 ** Negotiation failed. 5687 ** Target doesn't fetch the answer message. 5688 ** 5689 **------------------------------------------------------- 5690 */ 5691 5692 if (DEBUG_FLAGS & DEBUG_NEGO) { 5693 PRINT_ADDR(cp->xfer); 5694 printf ("negotiation failed sir=%x status=%x.\n", 5695 num, cp->nego_status); 5696 }; 5697 5698 /* 5699 ** any error in negotiation: 5700 ** fall back to default mode. 5701 */ 5702 switch (cp->nego_status) { 5703 5704 case NS_SYNC: 5705 ncr_setsync (np, cp, 0xe0); 5706 break; 5707 5708 case NS_WIDE: 5709 ncr_setwide (np, cp, 0); 5710 break; 5711 5712 }; 5713 np->msgin [0] = M_NOOP; 5714 np->msgout[0] = M_NOOP; 5715 cp->nego_status = 0; 5716 OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, dispatch)); 5717 break; 5718 5719 case SIR_NEGO_SYNC: 5720 /* 5721 ** Synchronous request message received. 5722 */ 5723 5724 if (DEBUG_FLAGS & DEBUG_NEGO) { 5725 PRINT_ADDR(cp->xfer); 5726 printf ("sync msgin: "); 5727 (void) ncr_show_msg (np->msgin); 5728 printf (".\n"); 5729 }; 5730 5731 /* 5732 ** get requested values. 5733 */ 5734 5735 chg = 0; 5736 per = np->msgin[3]; 5737 ofs = np->msgin[4]; 5738 if (ofs==0) per=255; 5739 5740 /* 5741 ** if target sends SDTR message, 5742 ** it CAN transfer synch. 5743 */ 5744 5745 if (ofs) 5746 tp->inqdata[7] |= INQ7_SYNC; 5747 5748 /* 5749 ** check values against driver limits. 5750 */ 5751 5752 if (per < np->ns_sync) 5753 {chg = 1; per = np->ns_sync;} 5754 if (per < tp->minsync) 5755 {chg = 1; per = tp->minsync;} 5756 if (ofs > tp->maxoffs) 5757 {chg = 1; ofs = tp->maxoffs;} 5758 5759 /* 5760 ** Check against controller limits. 5761 */ 5762 fak = (4ul * per - 1) / np->ns_sync - 3; 5763 if (ofs && (fak>7)) {chg = 1; ofs = 0;} 5764 if (!ofs) fak=7; 5765 5766 if (DEBUG_FLAGS & DEBUG_NEGO) { 5767 PRINT_ADDR(cp->xfer); 5768 printf ("sync: per=%d ofs=%d fak=%d chg=%d.\n", 5769 per, ofs, fak, chg); 5770 } 5771 5772 if (INB (HS_PRT) == HS_NEGOTIATE) { 5773 OUTB (HS_PRT, HS_BUSY); 5774 switch (cp->nego_status) { 5775 5776 case NS_SYNC: 5777 /* 5778 ** This was an answer message 5779 */ 5780 if (chg) { 5781 /* 5782 ** Answer wasn't acceptable. 5783 */ 5784 ncr_setsync (np, cp, 0xe0); 5785 OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, msg_bad)); 5786 } else { 5787 /* 5788 ** Answer is ok. 5789 */ 5790 ncr_setsync (np, cp, (fak<<5)|ofs); 5791 OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, clrack)); 5792 }; 5793 return; 5794 5795 case NS_WIDE: 5796 ncr_setwide (np, cp, 0); 5797 break; 5798 }; 5799 }; 5800 5801 /* 5802 ** It was a request. Set value and 5803 ** prepare an answer message 5804 */ 5805 5806 ncr_setsync (np, cp, (fak<<5)|ofs); 5807 5808 np->msgout[0] = M_EXTENDED; 5809 np->msgout[1] = 3; 5810 np->msgout[2] = M_X_SYNC_REQ; 5811 np->msgout[3] = per; 5812 np->msgout[4] = ofs; 5813 5814 cp->nego_status = NS_SYNC; 5815 5816 if (DEBUG_FLAGS & DEBUG_NEGO) { 5817 PRINT_ADDR(cp->xfer); 5818 printf ("sync msgout: "); 5819 (void) ncr_show_msg (np->msgout); 5820 printf (".\n"); 5821 } 5822 5823 if (!ofs) { 5824 OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, msg_bad)); 5825 return; 5826 } 5827 np->msgin [0] = M_NOOP; 5828 5829 break; 5830 5831 case SIR_NEGO_WIDE: 5832 /* 5833 ** Wide request message received. 5834 */ 5835 if (DEBUG_FLAGS & DEBUG_NEGO) { 5836 PRINT_ADDR(cp->xfer); 5837 printf ("wide msgin: "); 5838 (void) ncr_show_msg (np->msgin); 5839 printf (".\n"); 5840 }; 5841 5842 /* 5843 ** get requested values. 5844 */ 5845 5846 chg = 0; 5847 wide = np->msgin[3]; 5848 5849 /* 5850 ** if target sends WDTR message, 5851 ** it CAN transfer wide. 5852 */ 5853 5854 if (wide) 5855 tp->inqdata[7] |= INQ7_WIDE16; 5856 5857 /* 5858 ** check values against driver limits. 5859 */ 5860 5861 if (wide > tp->usrwide) 5862 {chg = 1; wide = tp->usrwide;} 5863 5864 if (DEBUG_FLAGS & DEBUG_NEGO) { 5865 PRINT_ADDR(cp->xfer); 5866 printf ("wide: wide=%d chg=%d.\n", wide, chg); 5867 } 5868 5869 if (INB (HS_PRT) == HS_NEGOTIATE) { 5870 OUTB (HS_PRT, HS_BUSY); 5871 switch (cp->nego_status) { 5872 5873 case NS_WIDE: 5874 /* 5875 ** This was an answer message 5876 */ 5877 if (chg) { 5878 /* 5879 ** Answer wasn't acceptable. 5880 */ 5881 ncr_setwide (np, cp, 0); 5882 OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, msg_bad)); 5883 } else { 5884 /* 5885 ** Answer is ok. 5886 */ 5887 ncr_setwide (np, cp, wide); 5888 OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, clrack)); 5889 }; 5890 return; 5891 5892 case NS_SYNC: 5893 ncr_setsync (np, cp, 0xe0); 5894 break; 5895 }; 5896 }; 5897 5898 /* 5899 ** It was a request, set value and 5900 ** prepare an answer message 5901 */ 5902 5903 ncr_setwide (np, cp, wide); 5904 5905 np->msgout[0] = M_EXTENDED; 5906 np->msgout[1] = 2; 5907 np->msgout[2] = M_X_WIDE_REQ; 5908 np->msgout[3] = wide; 5909 5910 np->msgin [0] = M_NOOP; 5911 5912 cp->nego_status = NS_WIDE; 5913 5914 if (DEBUG_FLAGS & DEBUG_NEGO) { 5915 PRINT_ADDR(cp->xfer); 5916 printf ("wide msgout: "); 5917 (void) ncr_show_msg (np->msgout); 5918 printf (".\n"); 5919 } 5920 break; 5921 5922/*-------------------------------------------------------------------- 5923** 5924** Processing of special messages 5925** 5926**-------------------------------------------------------------------- 5927*/ 5928 5929 case SIR_REJECT_RECEIVED: 5930 /*----------------------------------------------- 5931 ** 5932 ** We received a M_REJECT message. 5933 ** 5934 **----------------------------------------------- 5935 */ 5936 5937 PRINT_ADDR(cp->xfer); 5938 printf ("M_REJECT received (%x:%x).\n", 5939 (unsigned)np->lastmsg, np->msgout[0]); 5940 break; 5941 5942 case SIR_REJECT_SENT: 5943 /*----------------------------------------------- 5944 ** 5945 ** We received an unknown message 5946 ** 5947 **----------------------------------------------- 5948 */ 5949 5950 PRINT_ADDR(cp->xfer); 5951 printf ("M_REJECT sent for "); 5952 (void) ncr_show_msg (np->msgin); 5953 printf (".\n"); 5954 break; 5955 5956/*-------------------------------------------------------------------- 5957** 5958** Processing of special messages 5959** 5960**-------------------------------------------------------------------- 5961*/ 5962 5963 case SIR_IGN_RESIDUE: 5964 /*----------------------------------------------- 5965 ** 5966 ** We received an IGNORE RESIDUE message, 5967 ** which couldn't be handled by the script. 5968 ** 5969 **----------------------------------------------- 5970 */ 5971 5972 PRINT_ADDR(cp->xfer); 5973 printf ("M_IGN_RESIDUE received, but not yet implemented.\n"); 5974 break; 5975 5976 case SIR_MISSING_SAVE: 5977 /*----------------------------------------------- 5978 ** 5979 ** We received an DISCONNECT message, 5980 ** but the datapointer wasn't saved before. 5981 ** 5982 **----------------------------------------------- 5983 */ 5984 5985 PRINT_ADDR(cp->xfer); 5986 printf ("M_DISCONNECT received, but datapointer not saved:\n" 5987 "\tdata=%x save=%x goal=%x.\n", 5988 (unsigned) INL (nc_temp), 5989 (unsigned) np->header.savep, 5990 (unsigned) np->header.goalp); 5991 break; 5992 5993/*-------------------------------------------------------------------- 5994** 5995** Processing of a "S_QUEUE_FULL" status. 5996** 5997** The current command has been rejected, 5998** because there are too many in the command queue. 5999** We have started too many commands for that target. 6000** 6001** If possible, reinsert at head of queue. 6002** Stall queue until there are no disconnected jobs 6003** (ncr is REALLY idle). Then restart processing. 6004** 6005** We should restart the current job after the controller 6006** has become idle. But this is not yet implemented. 6007** 6008**-------------------------------------------------------------------- 6009*/ 6010 case SIR_STALL_QUEUE: 6011 /*----------------------------------------------- 6012 ** 6013 ** Stall the start queue. 6014 ** 6015 **----------------------------------------------- 6016 */ 6017 PRINT_ADDR(cp->xfer); 6018 printf ("queue full.\n"); 6019 6020 np->script->start1[0] = SCR_INT; 6021 6022 /* 6023 ** Try to disable tagged transfers. 6024 */ 6025 ncr_setmaxtags (&np->target[target], 0); 6026 6027 /* 6028 ** @QUEUE@ 6029 ** 6030 ** Should update the launch field of the 6031 ** current job to be able to restart it. 6032 ** Then prepend it to the start queue. 6033 */ 6034 6035 /* fall through */ 6036 6037 case SIR_STALL_RESTART: 6038 /*----------------------------------------------- 6039 ** 6040 ** Enable selecting again, 6041 ** if NO disconnected jobs. 6042 ** 6043 **----------------------------------------------- 6044 */ 6045 /* 6046 ** Look for a disconnected job. 6047 */ 6048 cp = &np->ccb; 6049 while (cp && cp->host_status != HS_DISCONNECT) 6050 cp = cp->link_ccb; 6051 6052 /* 6053 ** if there is one, ... 6054 */ 6055 if (cp) { 6056 /* 6057 ** wait for reselection 6058 */ 6059 OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, reselect)); 6060 return; 6061 }; 6062 6063 /* 6064 ** else remove the interrupt. 6065 */ 6066 6067 printf ("%s: queue empty.\n", ncr_name (np)); 6068 np->script->start1[0] = SCR_INT ^ IFFALSE (0); 6069 break; 6070 }; 6071 6072out: 6073 OUTB (nc_dcntl, (STD|NOCOM)); 6074} 6075 6076/*========================================================== 6077** 6078** 6079** Aquire a control block 6080** 6081** 6082**========================================================== 6083*/ 6084 6085static ccb_p ncr_get_ccb 6086 (ncb_p np, u_long flags, u_long target, u_long lun) 6087{ 6088 lcb_p lp; 6089 ccb_p cp = (ccb_p) 0; 6090 6091 /* 6092 ** Lun structure available ? 6093 */ 6094 6095 lp = np->target[target].lp[lun]; 6096 if (lp) { 6097 cp = lp->next_ccb; 6098 6099 /* 6100 ** Look for free CCB 6101 */ 6102 6103 while (cp && cp->magic) cp = cp->next_ccb; 6104 } 6105 6106 /* 6107 ** if nothing available, take the default. 6108 */ 6109 6110 if (!cp) cp = &np->ccb; 6111 6112 /* 6113 ** Wait until available. 6114 */ 6115 6116 while (cp->magic) { 6117 if (flags & SCSI_NOSLEEP) break; 6118 if (tsleep ((caddr_t)cp, PRIBIO|PCATCH, "ncr", 0)) 6119 break; 6120 }; 6121 6122 if (cp->magic) 6123 return ((ccb_p) 0); 6124 6125 cp->magic = 1; 6126 return (cp); 6127} 6128 6129/*========================================================== 6130** 6131** 6132** Release one control block 6133** 6134** 6135**========================================================== 6136*/ 6137 6138void ncr_free_ccb (ncb_p np, ccb_p cp, int flags) 6139{ 6140 /* 6141 ** sanity 6142 */ 6143 6144 assert (cp != NULL); 6145 6146 cp -> host_status = HS_IDLE; 6147 cp -> magic = 0; 6148 if (cp == &np->ccb) 6149 wakeup ((caddr_t) cp); 6150} 6151 6152/*========================================================== 6153** 6154** 6155** Allocation of resources for Targets/Luns/Tags. 6156** 6157** 6158**========================================================== 6159*/ 6160 6161static void ncr_alloc_ccb (ncb_p np, struct scsi_xfer * xp) 6162{ 6163 tcb_p tp; 6164 lcb_p lp; 6165 ccb_p cp; 6166 6167 u_long target; 6168 u_long lun; 6169 6170 assert (np != NULL); 6171 assert (xp != NULL); 6172 6173 target = xp->sc_link->target; 6174 lun = xp->sc_link->lun; 6175 6176 if (target>=MAX_TARGET) return; 6177 if (lun >=MAX_LUN ) return; 6178 6179 tp=&np->target[target]; 6180 6181 if (!tp->jump_tcb.l_cmd) { 6182 6183 /* 6184 ** initialize it. 6185 */ 6186 tp->jump_tcb.l_cmd = (SCR_JUMP^IFFALSE (DATA (0x80 + target))); 6187 tp->jump_tcb.l_paddr = np->jump_tcb.l_paddr; 6188 6189 tp->getscr[0] = SCR_COPY (1); 6190 tp->getscr[1] = vtophys (&tp->sval); 6191 tp->getscr[2] = np->paddr + offsetof (struct ncr_reg, nc_sxfer); 6192 tp->getscr[3] = SCR_COPY (1); 6193 tp->getscr[4] = vtophys (&tp->wval); 6194 tp->getscr[5] = np->paddr + offsetof (struct ncr_reg, nc_scntl3); 6195 6196 assert (( (offsetof(struct ncr_reg, nc_sxfer) ^ 6197 offsetof(struct tcb , sval )) &3) == 0); 6198 assert (( (offsetof(struct ncr_reg, nc_scntl3) ^ 6199 offsetof(struct tcb , wval )) &3) == 0); 6200 6201 tp->call_lun.l_cmd = (SCR_CALL); 6202 tp->call_lun.l_paddr = NCB_SCRIPT_PHYS (np, resel_lun); 6203 6204 tp->jump_lcb.l_cmd = (SCR_JUMP); 6205 tp->jump_lcb.l_paddr = NCB_SCRIPT_PHYS (np, abort); 6206 np->jump_tcb.l_paddr = vtophys (&tp->jump_tcb); 6207 6208 ncr_setmaxtags (tp, SCSI_NCR_DFLT_TAGS); 6209 } 6210 6211 /* 6212 ** Logic unit control block 6213 */ 6214 lp = tp->lp[lun]; 6215 if (!lp) { 6216 /* 6217 ** Allocate a lcb 6218 */ 6219 lp = (lcb_p) malloc (sizeof (struct lcb), M_DEVBUF, M_NOWAIT); 6220 if (!lp) return; 6221 6222 /* 6223 ** Initialize it 6224 */ 6225 bzero (lp, sizeof (*lp)); 6226 lp->jump_lcb.l_cmd = (SCR_JUMP ^ IFFALSE (DATA (lun))); 6227 lp->jump_lcb.l_paddr = tp->jump_lcb.l_paddr; 6228 6229 lp->call_tag.l_cmd = (SCR_CALL); 6230 lp->call_tag.l_paddr = NCB_SCRIPT_PHYS (np, resel_tag); 6231 6232 lp->jump_ccb.l_cmd = (SCR_JUMP); 6233 lp->jump_ccb.l_paddr = NCB_SCRIPT_PHYS (np, aborttag); 6234 6235 lp->actlink = 1; 6236 6237 /* 6238 ** Chain into LUN list 6239 */ 6240 tp->jump_lcb.l_paddr = vtophys (&lp->jump_lcb); 6241 tp->lp[lun] = lp; 6242 6243 } 6244 6245 /* 6246 ** Limit possible number of ccbs. 6247 ** 6248 ** If tagged command queueing is enabled, 6249 ** can use more than one ccb. 6250 */ 6251 6252 if (np->actccbs >= MAX_START-2) return; 6253 if (lp->actccbs && (lp->actccbs >= lp->reqccbs)) 6254 return; 6255 6256 /* 6257 ** Allocate a ccb 6258 */ 6259 cp = (ccb_p) malloc (sizeof (struct ccb), M_DEVBUF, M_NOWAIT); 6260 6261 if (!cp) 6262 return; 6263 6264 if (DEBUG_FLAGS & DEBUG_ALLOC) { 6265 PRINT_ADDR(xp); 6266 printf ("new ccb @%x.\n", (unsigned) cp); 6267 } 6268 6269 /* 6270 ** Count it 6271 */ 6272 lp->actccbs++; 6273 np->actccbs++; 6274 6275 /* 6276 ** Initialize it 6277 */ 6278 bzero (cp, sizeof (*cp)); 6279 6280 /* 6281 ** Fill in physical addresses 6282 */ 6283 6284 cp->p_ccb = vtophys (cp); 6285 6286 /* 6287 ** Chain into reselect list 6288 */ 6289 cp->jump_ccb.l_cmd = SCR_JUMP; 6290 cp->jump_ccb.l_paddr = lp->jump_ccb.l_paddr; 6291 lp->jump_ccb.l_paddr = CCB_PHYS (cp, jump_ccb); 6292 cp->call_tmp.l_cmd = SCR_CALL; 6293 cp->call_tmp.l_paddr = NCB_SCRIPT_PHYS (np, resel_tmp); 6294 6295 /* 6296 ** Chain into wakeup list 6297 */ 6298 cp->link_ccb = np->ccb.link_ccb; 6299 np->ccb.link_ccb = cp; 6300 6301 /* 6302 ** Chain into CCB list 6303 */ 6304 cp->next_ccb = lp->next_ccb; 6305 lp->next_ccb = cp; 6306} 6307 6308/*========================================================== 6309** 6310** 6311** Announce the number of ccbs/tags to the scsi driver. 6312** 6313** 6314**========================================================== 6315*/ 6316 6317static void ncr_opennings (ncb_p np, lcb_p lp, struct scsi_xfer * xp) 6318{ 6319 /* 6320 ** want to reduce the number ... 6321 */ 6322 if (lp->actlink > lp->reqlink) { 6323 6324 /* 6325 ** Try to reduce the count. 6326 ** We assume to run at splbio .. 6327 */ 6328 u_char diff = lp->actlink - lp->reqlink; 6329 6330 if (!diff) return; 6331 6332#ifdef __NetBSD__ 6333 if (diff > xp->sc_link->openings) 6334 diff = xp->sc_link->openings; 6335 6336 xp->sc_link->openings -= diff; 6337#else /* !__NetBSD__ */ 6338 if (diff > xp->sc_link->opennings) 6339 diff = xp->sc_link->opennings; 6340 6341 xp->sc_link->opennings -= diff; 6342#endif /* __NetBSD__ */ 6343 lp->actlink -= diff; 6344 if (DEBUG_FLAGS & DEBUG_TAGS) 6345 printf ("%s: actlink: diff=%d, new=%d, req=%d\n", 6346 ncr_name(np), diff, lp->actlink, lp->reqlink); 6347 return; 6348 }; 6349 6350 /* 6351 ** want to increase the number ? 6352 */ 6353 if (lp->reqlink > lp->actlink) { 6354 u_char diff = lp->reqlink - lp->actlink; 6355 6356#ifdef __NetBSD__ 6357 xp->sc_link->openings += diff; 6358#else /* !__NetBSD__ */ 6359 xp->sc_link->opennings += diff; 6360#endif /* __NetBSD__ */ 6361 lp->actlink += diff; 6362 wakeup ((caddr_t) xp->sc_link); 6363 if (DEBUG_FLAGS & DEBUG_TAGS) 6364 printf ("%s: actlink: diff=%d, new=%d, req=%d\n", 6365 ncr_name(np), diff, lp->actlink, lp->reqlink); 6366 }; 6367} 6368 6369/*========================================================== 6370** 6371** 6372** Build Scatter Gather Block 6373** 6374** 6375**========================================================== 6376** 6377** The transfer area may be scattered among 6378** several non adjacent physical pages. 6379** 6380** We may use MAX_SCATTER blocks. 6381** 6382**---------------------------------------------------------- 6383*/ 6384 6385static int ncr_scatter 6386 (struct dsb* phys, vm_offset_t vaddr, vm_size_t datalen) 6387{ 6388 u_long paddr, pnext; 6389 6390 u_short segment = 0; 6391 u_long segsize, segaddr; 6392 u_long size, csize = 0; 6393 u_long chunk = MAX_SIZE; 6394 int free; 6395 6396 bzero (&phys->data, sizeof (phys->data)); 6397 if (!datalen) return (0); 6398 6399 paddr = vtophys (vaddr); 6400 6401 /* 6402 ** insert extra break points at a distance of chunk. 6403 ** We try to reduce the number of interrupts caused 6404 ** by unexpected phase changes due to disconnects. 6405 ** A typical harddisk may disconnect before ANY block. 6406 ** If we wanted to avoid unexpected phase changes at all 6407 ** we had to use a break point every 512 bytes. 6408 ** Of course the number of scatter/gather blocks is 6409 ** limited. 6410 */ 6411 6412 free = MAX_SCATTER - 1; 6413 6414 if (vaddr & (NBPG-1)) free -= datalen / NBPG; 6415 6416 if (free>1) 6417 while ((chunk * free >= 2 * datalen) && (chunk>=1024)) 6418 chunk /= 2; 6419 6420 if(DEBUG_FLAGS & DEBUG_SCATTER) 6421 printf("ncr?:\tscattering virtual=0x%x size=%d chunk=%d.\n", 6422 (unsigned) vaddr, (unsigned) datalen, (unsigned) chunk); 6423 6424 /* 6425 ** Build data descriptors. 6426 */ 6427 while (datalen && (segment < MAX_SCATTER)) { 6428 6429 /* 6430 ** this segment is empty 6431 */ 6432 segsize = 0; 6433 segaddr = paddr; 6434 pnext = paddr; 6435 6436 if (!csize) csize = chunk; 6437 6438 while ((datalen) && (paddr == pnext) && (csize)) { 6439 6440 /* 6441 ** continue this segment 6442 */ 6443 pnext = (paddr & (~(NBPG - 1))) + NBPG; 6444 6445 /* 6446 ** Compute max size 6447 */ 6448 6449 size = pnext - paddr; /* page size */ 6450 if (size > datalen) size = datalen; /* data size */ 6451 if (size > csize ) size = csize ; /* chunksize */ 6452 6453 segsize += size; 6454 vaddr += size; 6455 csize -= size; 6456 datalen -= size; 6457 paddr = vtophys (vaddr); 6458 }; 6459 6460 if(DEBUG_FLAGS & DEBUG_SCATTER) 6461 printf ("\tseg #%d addr=%x size=%d (rest=%d).\n", 6462 segment, 6463 (unsigned) segaddr, 6464 (unsigned) segsize, 6465 (unsigned) datalen); 6466 6467 phys->data[segment].addr = segaddr; 6468 phys->data[segment].size = segsize; 6469 segment++; 6470 } 6471 6472 if (datalen) { 6473 printf("ncr?: scatter/gather failed (residue=%d).\n", 6474 (unsigned) datalen); 6475 return (-1); 6476 }; 6477 6478 return (segment); 6479} 6480 6481/*========================================================== 6482** 6483** 6484** Test the pci bus snoop logic :-( 6485** 6486** Has to be called with interrupts disabled. 6487** 6488** 6489**========================================================== 6490*/ 6491 6492#ifndef NCR_IOMAPPED 6493static int ncr_regtest (struct ncb* np) 6494{ 6495 register volatile u_long data, *addr; 6496 /* 6497 ** ncr registers may NOT be cached. 6498 ** write 0xffffffff to a read only register area, 6499 ** and try to read it back. 6500 */ 6501 addr = (u_long*) &np->reg->nc_dstat; 6502 data = 0xffffffff; 6503 *addr= data; 6504 data = *addr; 6505#if 1 6506 if (data == 0xffffffff) { 6507#else 6508 if ((data & 0xe2f0fffd) != 0x02000080) { 6509#endif 6510 printf ("CACHE TEST FAILED: reg dstat-sstat2 readback %x.\n", 6511 (unsigned) data); 6512 return (0x10); 6513 }; 6514 return (0); 6515} 6516#endif 6517 6518static int ncr_snooptest (struct ncb* np) 6519{ 6520 u_long ncr_rd, ncr_wr, ncr_bk, host_rd, host_wr, pc, err=0; 6521 int i; 6522#ifndef NCR_IOMAPPED 6523 err |= ncr_regtest (np); 6524 if (err) return (err); 6525#endif 6526 /* 6527 ** init 6528 */ 6529 pc = NCB_SCRIPT_PHYS (np, snooptest); 6530 host_wr = 1; 6531 ncr_wr = 2; 6532 /* 6533 ** Set memory and register. 6534 */ 6535 ncr_cache = host_wr; 6536 OUTL (nc_temp, ncr_wr); 6537 /* 6538 ** Start script (exchange values) 6539 */ 6540 OUTL (nc_dsp, pc); 6541 /* 6542 ** Wait 'til done (with timeout) 6543 */ 6544 for (i=0; i<NCR_SNOOP_TIMEOUT; i++) 6545 if (INB(nc_istat) & (INTF|SIP|DIP)) 6546 break; 6547 /* 6548 ** Save termination position. 6549 */ 6550 pc = INL (nc_dsp); 6551 /* 6552 ** Read memory and register. 6553 */ 6554 host_rd = ncr_cache; 6555 ncr_rd = INL (nc_scratcha); 6556 ncr_bk = INL (nc_temp); 6557 /* 6558 ** Reset ncr chip 6559 */ 6560 OUTB (nc_istat, SRST); 6561 DELAY (1000); 6562 OUTB (nc_istat, 0 ); 6563 /* 6564 ** check for timeout 6565 */ 6566 if (i>=NCR_SNOOP_TIMEOUT) { 6567 printf ("CACHE TEST FAILED: timeout.\n"); 6568 return (0x20); 6569 }; 6570 /* 6571 ** Check termination position. 6572 */ 6573 if (pc != NCB_SCRIPT_PHYS (np, snoopend)+8) { 6574 printf ("CACHE TEST FAILED: script execution failed.\n"); 6575 return (0x40); 6576 }; 6577 /* 6578 ** Show results. 6579 */ 6580 if (host_wr != ncr_rd) { 6581 printf ("CACHE TEST FAILED: host wrote %d, ncr read %d.\n", 6582 (int) host_wr, (int) ncr_rd); 6583 err |= 1; 6584 }; 6585 if (host_rd != ncr_wr) { 6586 printf ("CACHE TEST FAILED: ncr wrote %d, host read %d.\n", 6587 (int) ncr_wr, (int) host_rd); 6588 err |= 2; 6589 }; 6590 if (ncr_bk != ncr_wr) { 6591 printf ("CACHE TEST FAILED: ncr wrote %d, read back %d.\n", 6592 (int) ncr_wr, (int) ncr_bk); 6593 err |= 4; 6594 }; 6595 return (err); 6596} 6597 6598/*========================================================== 6599** 6600** 6601** Profiling the drivers and targets performance. 6602** 6603** 6604**========================================================== 6605*/ 6606 6607/* 6608** Compute the difference in milliseconds. 6609**/ 6610 6611static int ncr_delta (struct timeval * from, struct timeval * to) 6612{ 6613 if (!from->tv_sec) return (-1); 6614 if (!to ->tv_sec) return (-2); 6615 return ( (to->tv_sec - from->tv_sec - 2)*1000+ 6616 +(to->tv_usec - from->tv_usec + 2000000)/1000); 6617} 6618 6619#define PROFILE cp->phys.header.stamp 6620static void ncb_profile (ncb_p np, ccb_p cp) 6621{ 6622 int co, da, st, en, di, se, post,work,disc; 6623 u_long diff; 6624 6625 PROFILE.end = time; 6626 6627 st = ncr_delta (&PROFILE.start,&PROFILE.status); 6628 if (st<0) return; /* status not reached */ 6629 6630 da = ncr_delta (&PROFILE.start,&PROFILE.data); 6631 if (da<0) return; /* No data transfer phase */ 6632 6633 co = ncr_delta (&PROFILE.start,&PROFILE.command); 6634 if (co<0) return; /* command not executed */ 6635 6636 en = ncr_delta (&PROFILE.start,&PROFILE.end), 6637 di = ncr_delta (&PROFILE.start,&PROFILE.disconnect), 6638 se = ncr_delta (&PROFILE.start,&PROFILE.select); 6639 post = en - st; 6640 6641 /* 6642 ** @PROFILE@ Disconnect time invalid if multiple disconnects 6643 */ 6644 6645 if (di>=0) disc = se-di; else disc = 0; 6646 6647 work = (st - co) - disc; 6648 6649 diff = (np->disc_phys - np->disc_ref) & 0xff; 6650 np->disc_ref += diff; 6651 6652 np->profile.num_trans += 1; 6653 if (cp->xfer) 6654 np->profile.num_bytes += cp->xfer->datalen; 6655 np->profile.num_disc += diff; 6656 np->profile.ms_setup += co; 6657 np->profile.ms_data += work; 6658 np->profile.ms_disc += disc; 6659 np->profile.ms_post += post; 6660} 6661#undef PROFILE 6662 6663/*========================================================== 6664** 6665** 6666** Device lookup. 6667** 6668** @GENSCSI@ should be integrated to scsiconf.c 6669** 6670** 6671**========================================================== 6672*/ 6673 6674#ifndef NEW_SCSICONF 6675 6676struct table_entry { 6677 char * manufacturer; 6678 char * model; 6679 char * version; 6680 u_long info; 6681}; 6682 6683static struct table_entry device_tab[] = 6684{ 6685#ifdef NCR_GETCC_WITHMSG 6686 {"", "", "", QUIRK_NOMSG}, 6687 {"SONY", "SDT-5000", "3.17", QUIRK_NOMSG}, 6688 {"WangDAT", "Model 2600", "01.7", QUIRK_NOMSG}, 6689 {"WangDAT", "Model 3200", "02.2", QUIRK_NOMSG}, 6690 {"WangDAT", "Model 1300", "02.4", QUIRK_NOMSG}, 6691#endif 6692 {"", "", "", 0} /* catch all: must be last entry. */ 6693}; 6694 6695static u_long ncr_lookup(char * id) 6696{ 6697 struct table_entry * p = device_tab; 6698 char *d, *r, c; 6699 6700 for (;;p++) { 6701 6702 d = id+8; 6703 r = p->manufacturer; 6704 while ((c=*r++)) if (c!=*d++) break; 6705 if (c) continue; 6706 6707 d = id+16; 6708 r = p->model; 6709 while ((c=*r++)) if (c!=*d++) break; 6710 if (c) continue; 6711 6712 d = id+32; 6713 r = p->version; 6714 while ((c=*r++)) if (c!=*d++) break; 6715 if (c) continue; 6716 6717 return (p->info); 6718 } 6719} 6720#endif 6721 6722/*========================================================== 6723** 6724** Determine the ncr's clock frequency. 6725** This is important for the negotiation 6726** of the synchronous transfer rate. 6727** 6728**========================================================== 6729** 6730** Note: we have to return the correct value. 6731** THERE IS NO SAVE DEFAULT VALUE. 6732** 6733** We assume that all NCR based boards are delivered 6734** with a 40Mhz clock. Because we have to divide 6735** by an integer value greater than 3, only clock 6736** frequencies of 40Mhz (/4) or 50MHz (/5) permit 6737** the FAST-SCSI rate of 10MHz. 6738** 6739**---------------------------------------------------------- 6740*/ 6741 6742#ifndef NCR_CLOCK 6743# define NCR_CLOCK 40 6744#endif /* NCR_CLOCK */ 6745 6746 6747static void ncr_getclock (ncb_p np) 6748{ 6749 u_char tbl[5] = {6,2,3,4,6}; 6750 u_char f; 6751 u_char ns_clock = (1000/NCR_CLOCK); 6752 6753 /* 6754 ** Compute the best value for scntl3. 6755 */ 6756 6757 f = (2 * MIN_SYNC_PD - 1) / ns_clock; 6758 if (!f ) f=1; 6759 if (f>4) f=4; 6760 np -> ns_sync = (ns_clock * tbl[f]) / 2; 6761 np -> rv_scntl3 = f<<4; 6762 6763 f = (2 * MIN_ASYNC_PD - 1) / ns_clock; 6764 if (!f ) f=1; 6765 if (f>4) f=4; 6766 np -> ns_async = (ns_clock * tbl[f]) / 2; 6767 np -> rv_scntl3 |= f; 6768 if (DEBUG_FLAGS & DEBUG_TIMING) 6769 printf ("%s: sclk=%d async=%d sync=%d (ns) scntl3=0x%x\n", 6770 ncr_name (np), ns_clock, np->ns_async, np->ns_sync, np->rv_scntl3); 6771} 6772 6773/*=========================================================================*/ 6774#endif /* KERNEL */ 6775 6776 6777