/************************************************************************** ** ** $Id: ncr.c,v 1.2 1994/10/01 06:27:56 mycroft Exp $ ** ** Device driver for the NCR 53C810 PCI-SCSI-Controller. ** ** 386bsd / FreeBSD / NetBSD ** **------------------------------------------------------------------------- ** ** Written for 386bsd and FreeBSD by ** wolf@dentaro.gun.de Wolfgang Stanglmeier ** se@mi.Uni-Koeln.de Stefan Esser ** ** Ported to NetBSD by ** mycroft@gnu.ai.mit.edu ** **------------------------------------------------------------------------- ** ** Copyright (c) 1994 Wolfgang Stanglmeier. All rights reserved. ** ** Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions ** are met: ** 1. Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** 2. Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in the ** documentation and/or other materials provided with the distribution. ** 3. The name of the author may not be used to endorse or promote products ** derived from this software without specific prior written permission. ** ** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR ** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES ** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. ** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, ** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT ** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF ** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ** **------------------------------------------------------------------------- */ #ifndef __NetBSD__ #ifdef KERNEL #include #else /* KERNEL */ #define NNCR 1 #endif /* KERNEL */ #endif /* !__NetBSD__ */ #define NCR_VERSION (2) /*========================================================== ** ** Configuration and Debugging ** ** May be overwritten in ** **========================================================== */ /* ** Enable/Disable debug messages. ** Can be changed at runtime too. */ #ifndef SCSI_NCR_DEBUG #define SCSI_NCR_DEBUG (0) #endif /* SCSI_NCR_DEBUG */ /* ** SCSI address of this device. ** The boot routines should have set it. ** If not, use this. */ #ifndef SCSI_NCR_MYADDR #define SCSI_NCR_MYADDR (7) #endif /* SCSI_NCR_MYADDR */ /* ** The maximal synchronous frequency in kHz. ** (0=asynchronous) */ #ifndef SCSI_NCR_MAX_SYNC #define SCSI_NCR_MAX_SYNC (0) #endif /* SCSI_NCR_MAX_SYNC */ /* ** The maximal bus with (in log2 byte) ** (0=8 bit, 1=16 bit) */ #ifndef SCSI_NCR_MAX_WIDE #define SCSI_NCR_MAX_WIDE (0) #endif /* SCSI_NCR_MAX_WIDE */ /* ** The maximum number of tags per logic unit. ** Used only for disk devices that support tags. */ #ifndef SCSI_NCR_MAX_TAGS #define SCSI_NCR_MAX_TAGS (8) #endif /* SCSI_NCR_MAX_TAGS */ /*========================================================== ** ** Configuration and Debugging ** **========================================================== */ /* ** Number of targets supported by the driver. ** n permits target numbers 0..n-1. ** Default is 7, meaning targets #0..#6. ** #7 .. is myself. */ #define MAX_TARGET (7) /* ** Number of logic units supported by the driver. ** n enables logic unit numbers 0..n-1. ** The common SCSI devices require only ** one lun, so take 1 as the default. */ #define MAX_LUN (1) /* ** The maximum number of jobs scheduled for starting. ** There should be one slot per target, and one slot ** for each tag of each target. */ #define MAX_START (20) /* ** The maximum number of segments a transfer is split into. */ #define MAX_SCATTER (33) /* ** The maximum transfer length (should be >= 64k). ** MUST NOT be greater than (MAX_SCATTER-1) * NBPG. */ #define MAX_SIZE ((MAX_SCATTER-1) * NBPG) /* ** Enable some processor/os dependent functions. */ #define DIRTY 1 /* ** Write disk status information to dkstat ? */ #define DK 1 /*========================================================== ** ** Include files ** **========================================================== */ #include #include #include #ifdef KERNEL #include #include #include #include #ifdef DK #include #endif /* DK */ #include #endif /* KERNEL */ #include #ifdef __NetBSD__ #include #include #include #else #include #include #include #endif #include #include /*========================================================== ** ** Debugging tags ** **========================================================== */ #ifdef SCSI_NCR_DEBUG #define DEBUG_ALLOC (0x0001) #define DEBUG_PHASE (0x0002) #define DEBUG_POLL (0x0004) #define DEBUG_QUEUE (0x0008) #define DEBUG_RESULT (0x0010) #define DEBUG_SCATTER (0x0020) #define DEBUG_SCRIPT (0x0040) #define DEBUG_TINY (0x0080) #define DEBUG_TIMING (0x0100) #define DEBUG_NEGO (0x0200) #define DEBUG_TAGS (0x0400) #define DEBUG_FREEZE (0x0800) #define DEBUG_RESTART (0x1000) int ncr_debug = SCSI_NCR_DEBUG; #else /* SCSI_NCR_DEBUG */ int ncr_debug = 0; #endif /* SCSI_NCR_DEBUG */ /*========================================================== ** ** assert () ** **========================================================== ** ** modified copy from 386bsd:/usr/include/sys/assert.h ** **---------------------------------------------------------- */ #define assert(expression) { \ if (!(expression)) { \ (void)printf(\ "assertion \"%s\" failed: file \"%s\", line %d\n", \ #expression, \ __FILE__, __LINE__); \ } \ } /*========================================================== ** ** Access to the controller chip. ** **========================================================== */ #define INB(r) (np->reg->r) #define INW(r) (np->reg->r) #define INL(r) (np->reg->r) #define OUTB(r, val) np->reg->r = val #define OUTW(r, val) np->reg->r = val #define OUTL(r, val) np->reg->r = val /*========================================================== ** ** Command control block states. ** **========================================================== */ #define HS_IDLE (0) #define HS_BUSY (1) #define HS_NEGOTIATE (2) /* sync/wide data transfer*/ #define HS_DISCONNECT (3) /* Disconnected by target */ #define HS_COMPLETE (4) #define HS_SEL_TIMEOUT (5) /* Selection timeout */ #define HS_RESET (6) /* SCSI reset */ #define HS_ABORTED (7) /* Transfer aborted */ #define HS_TIMEOUT (8) /* Software timeout */ #define HS_FAIL (9) /* SCSI or PCI bus errors */ #define HS_UNEXPECTED (10) /* Unexpected disconnect */ #define HS_DONEMASK (0xfc) /*========================================================== ** ** Software Interrupt Codes ** **========================================================== */ #define SIR_SENSE_RESTART (1) #define SIR_SENSE_FAILED (2) #define SIR_STALL_RESTART (3) #define SIR_STALL_QUEUE (4) #define SIR_NEGO_SYNC (5) #define SIR_NEGO_WIDE (6) #define SIR_NEGO_FAILED (7) #define SIR_NEGO_PROTO (8) #define SIR_REJECT_RECEIVED (9) #define SIR_REJECT_SENT (10) #define SIR_IGN_RESIDUE (11) #define SIR_MISSING_SAVE (12) #define SIR_MAX (12) /*========================================================== ** ** Extended error codes. ** xerr_status field of struct ccb. ** **========================================================== */ #define XE_OK (0) #define XE_EXTRA_DATA (1) /* unexpected data phase */ #define XE_BAD_PHASE (2) /* illegal phase (4/5) */ /*========================================================== ** ** Negotiation status. ** nego_status field of struct ccb. ** **========================================================== */ #define NS_SYNC (1) #define NS_WIDE (2) /*========================================================== ** ** "Special features" of targets. ** quirks field of struct tcb. ** actualquirks field of struct ccb. ** **========================================================== */ #define QUIRK_AUTOSAVE (0x01) #define QUIRK_NOMSG (0x02) #define QUIRK_UPDATE (0x80) /*========================================================== ** ** Capability bits in Inquire response byte 7. ** **========================================================== */ #define INQ7_QUEUE (0x02) #define INQ7_SYNC (0x10) #define INQ7_WIDE16 (0x20) /*========================================================== ** ** Misc. ** **========================================================== */ #define CCB_MAGIC (0xf2691ad2) /*========================================================== ** ** OS dependencies. ** **========================================================== */ #ifndef __FreeBSD__ #ifndef __NetBSD__ #define ANCIENT #endif /*__NetBSD__*/ #endif /*__FreeBSD__*/ #ifdef ANCIENT #ifdef KERNEL extern int splbio(void); extern void splx(int level); extern int wakeup(void* channel); extern int tsleep(); extern int DELAY(); extern int scsi_attachdevs(); extern void timeout(); extern void untimeout(); #endif /* KERNEL */ #define LUN lu #define TARGET targ #define PRINT_ADDR(xp) printf ("ncr0: targ %d lun %d ",xp->targ,xp->lu) #define INT32 int #define U_INT32 long #define TIMEOUT #else /* !ANCIENT */ #define LUN sc_link->lun #define TARGET sc_link->target #define PRINT_ADDR(xp) sc_print_addr(xp->sc_link) #ifdef __NetBSD__ #define INT32 int #define U_INT32 u_int #define TIMEOUT (void*) #else /*__NetBSD__*/ #define INT32 int32 #define U_INT32 u_int32 #define TIMEOUT (timeout_func_t) #endif /*__NetBSD__*/ #endif /* ANCIENT */ /*========================================================== ** ** Declaration of structs. ** **========================================================== */ struct tcb; struct lcb; struct ccb; struct ncb; struct script; typedef struct ncb * ncb_p; typedef struct tcb * tcb_p; typedef struct lcb * lcb_p; typedef struct ccb * ccb_p; struct link { u_long l_cmd; u_long l_paddr; }; struct usrcmd { u_long target; u_long lun; u_long data; u_long cmd; }; #define UC_SETSYNC 10 #define UC_SETTAGS 11 #define UC_SETDEBUG 12 #define UC_SETORDER 13 #define UC_SETWIDE 14 #define UC_SETFLAG 15 #define UF_TRACE (0x01) /*========================================================== ** ** Access to fields of structs. ** **========================================================== */ #define offsetof(type, member) ((size_t)(&((type *)0)->member)) /*--------------------------------------- ** ** Timestamps for profiling ** **--------------------------------------- */ struct tstamp { struct timeval start; struct timeval end; struct timeval select; struct timeval command; struct timeval data; struct timeval status; struct timeval disconnect; struct timeval reselect; }; /* ** profiling data (per device) */ struct profile { u_long num_trans; u_long num_bytes; u_long num_disc; u_long num_break; u_long num_int; u_long num_fly; u_long ms_setup; u_long ms_data; u_long ms_disc; u_long ms_post; }; /*========================================================== ** ** Declaration of structs: TARGET control block ** **========================================================== */ struct tcb { /* ** during reselection the ncr jumps to this point ** with SFBR set to the encoded TARGET number ** with bit 7 set. ** if it's not this target, jump to the next. ** ** JUMP IF (SFBR != #TARGET#) ** @(next tcb) */ struct link jump_tcb; /* ** load the actual values for the sxfer and the scntl3 ** register (sync/wide mode). ** ** SCR_COPY (1); ** @(sval field of this tcb) ** @(sxfer register) ** SCR_COPY (1); ** @(wval field of this tcb) ** @(scntl3 register) */ ncrcmd getscr[6]; /* ** if next message is "identify" ** then load the message to SFBR, ** else load 0 to SFBR. ** ** CALL ** */ struct link call_lun; /* ** now look for the right lun. ** ** JUMP ** @(first ccb of this lun) */ struct link jump_lcb; /* ** pointer to interrupted getcc ccb */ ccb_p hold_cp; /* ** statistical data */ u_long transfers; u_long bytes; /* ** user settable limits for sync transfer ** and tagged commands. */ u_char usrsync; u_char usrtags; u_char usrwide; u_char usrflag; /* ** negotiation of wide and synch transfer. ** device quirks. */ /*0*/ u_char minsync; /*1*/ u_char sval; /*2*/ u_short period; /*0*/ u_char maxoffs; /*1*/ u_char quirks; /*2*/ u_char widedone; /*3*/ u_char wval; /* ** inquire data */ #define MAX_INQUIRE 36 u_char inqdata[MAX_INQUIRE]; /* ** the lcb's of this tcb */ lcb_p lp[MAX_LUN]; }; /*========================================================== ** ** Declaration of structs: LUN control block ** **========================================================== */ struct lcb { /* ** during reselection the ncr jumps to this point ** with SFBR set to the "Identify" message. ** if it's not this lun, jump to the next. ** ** JUMP IF (SFBR == #LUN#) ** @(next lcb of this target) */ struct link jump_lcb; /* ** if next message is "simple tag", ** then load the tag to SFBR, ** else load 0 to SFBR. ** ** CALL ** */ struct link call_tag; /* ** now look for the right ccb. ** ** JUMP ** @(first ccb of this lun) */ struct link jump_ccb; /* ** start of the ccb chain */ ccb_p next_ccb; /* ** Control of tagged queueing */ u_char reqccbs; u_char actccbs; u_char reqlink; u_char actlink; u_char usetags; u_char lasttag; }; /*========================================================== ** ** Declaration of structs: COMMAND control block ** **========================================================== ** ** This substructure is copied from the ccb to a ** global address after selection (or reselection) ** and copied back before disconnect. ** ** These fields are accessible to the script processor. ** **---------------------------------------------------------- */ struct head { /* ** Execution of a ccb starts at this point. ** It's a jump to the "SELECT" label ** of the script. ** ** After successful selection the script ** processor overwrites it with a jump to ** the IDLE label of the script. */ struct link launch; /* ** Saved data pointer. ** Points to the position in the script ** responsible for the actual transfer ** of data. ** It's written after reception of a ** "SAVE_DATA_POINTER" message. ** The goalpointer points after ** the last transfer command. */ u_long savep; u_long lastp; u_long goalp; /* ** The virtual address of the ccb ** containing this header. */ ccb_p cp; /* ** space for some timestamps to gather ** profiling data about devices and this driver. */ struct tstamp stamp; /* ** status fields. */ u_char status[8]; }; /* ** The status bytes are used by the host and the script processor. ** ** The first four byte are copied to the scratchb register ** (declared as scr0..scr3 in ncr_reg.h) just after the select/reselect, ** and copied back just after disconnecting. ** Inside the script the XX_REG are used. ** ** The last four bytes are used inside the script by "COPY" commands. ** Because source and destination must have the same alignment ** in a longword, the fields HAVE to be on the selected offsets. ** xerr_st (4) 0 (0x34) scratcha ** sync_st (5) 1 (0x05) sxfer ** wide_st (7) 3 (0x03) scntl3 */ /* ** First four bytes (script) */ #define QU_REG scr0 #define HS_REG scr1 #define HS_PRT nc_scr1 #define SS_REG scr2 #define PS_REG scr3 /* ** First four bytes (host) */ #define actualquirks phys.header.status[0] #define host_status phys.header.status[1] #define scsi_status phys.header.status[2] #define parity_status phys.header.status[3] /* ** Last four bytes (script) */ #define xerr_st header.status[4] /* MUST be ==0 mod 4 */ #define sync_st header.status[5] /* MUST be ==1 mod 4 */ #define nego_st header.status[6] #define wide_st header.status[7] /* MUST be ==3 mod 4 */ /* ** Last four bytes (host) */ #define xerr_status phys.xerr_st #define sync_status phys.sync_st #define nego_status phys.nego_st #define wide_status phys.wide_st /*========================================================== ** ** Declaration of structs: Data structure block ** **========================================================== ** ** During execution of a ccb by the script processor, ** the DSA (data structure address) register points ** to this substructure of the ccb. ** This substructure contains the header with ** the script-processor-changable data and ** data blocks for the indirect move commands. ** **---------------------------------------------------------- */ struct dsb { /* ** Header. ** Has to be the first entry, ** because it's jumped to by the ** script processor */ struct head header; /* ** Table data for Script */ struct scr_tblsel select; struct scr_tblmove smsg ; struct scr_tblmove smsg2 ; struct scr_tblmove cmd ; struct scr_tblmove sense ; struct scr_tblmove data [MAX_SCATTER]; }; /*========================================================== ** ** Declaration of structs: Command control block. ** **========================================================== ** ** During execution of a ccb by the script processor, ** the DSA (data structure address) register points ** to this substructure of the ccb. ** This substructure contains the header with ** the script-processor-changable data and then ** data blocks for the indirect move commands. ** **---------------------------------------------------------- */ struct ccb { /* ** during reselection the ncr jumps to this point. ** If a "SIMPLE_TAG" message was received, ** then SFBR is set to the tag. ** else SFBR is set to 0 ** If looking for another tag, jump to the next ccb. ** ** JUMP IF (SFBR != #TAG#) ** @(next ccb of this lun) */ struct link jump_ccb; /* ** After execution of this call, the return address ** (in the TEMP register) points to the following ** data structure block. ** So copy it to the DSA register, and start ** processing of this data structure. ** ** CALL ** */ struct link call_tmp; /* ** This is the data structure which is ** to be executed by the script processor. */ struct dsb phys; /* ** If a data transfer phase is terminated too early ** (after reception of a message (i.e. DISCONNECT)), ** we have to prepare a mini script to transfer ** the rest of the data. */ u_long patch[8]; /* ** The general SCSI driver provides a ** pointer to a control block. */ struct scsi_xfer *xfer; #ifdef ANCIENT /* ** We copy the SCSI command, because it ** may be volatile (on the stack). ** */ struct scsi_generic cmd; #endif /* ANCIENT */ /* ** We prepare a message to be sent after selection, ** and a second one to be sent after getcc selection. ** Contents are IDENTIFY and SIMPLE_TAG. ** While negotiating sync or wide transfer, ** a SDTM or WDTM message is appended. */ u_char scsi_smsg [8]; u_char scsi_smsg2[8]; /* ** Lock this ccb. ** Flag is used while looking for a free ccb. */ u_long magic; /* ** Completion time out for this job. ** It's set to time of start + allowed number of seconds. */ u_long tlimit; /* ** All ccbs of one hostadapter are linked. */ ccb_p link_ccb; /* ** All ccbs of one target/lun are linked. */ ccb_p next_ccb; /* ** Tag for this transfer. ** It's patched into jump_ccb. ** If it's not zero, a SIMPLE_TAG ** message is included in smsg. */ u_char tag; }; /*========================================================== ** ** Declaration of structs: NCR device descriptor ** **========================================================== */ struct ncb { #ifdef __NetBSD__ struct device sc_dev; struct intrhand sc_ih; #endif /*----------------------------------------------- ** Scripts .. **----------------------------------------------- ** ** During reselection the ncr jumps to this point. ** The SFBR register is loaded with the encoded target id. ** ** Jump to the first target. ** ** JUMP ** @(next tcb) */ struct link jump_tcb; /*----------------------------------------------- ** Configuration .. **----------------------------------------------- ** ** virtual and physical addresses ** of the 53c810 chip. */ vm_offset_t vaddr; vm_offset_t paddr; /* ** pointer to the chip's registers. */ volatile struct ncr_reg* reg; /* ** A copy of the script, relocated for this ncb. */ struct script *script; u_long p_script; /* ** The SCSI address of the host adapter. */ u_char myaddr; /* ** timing parameters */ u_char ns_async; u_char ns_sync; u_char rv_scntl3; #ifndef ANCIENT /*----------------------------------------------- ** Link to the generic SCSI driver **----------------------------------------------- */ struct scsi_link sc_link; #endif /* ANCIENT */ /*----------------------------------------------- ** Job control **----------------------------------------------- ** ** Commands from user */ struct usrcmd user; u_char order; /* ** Target data */ struct tcb target[MAX_TARGET]; /* ** Start queue. */ u_long squeue [MAX_START]; u_short squeueput; u_short actccbs; /* ** Timeout handler */ u_long heartbeat; u_short ticks; u_short latetime; u_long lasttime; #ifndef __NetBSD__ u_short imask; u_short mcount; #endif /*----------------------------------------------- ** Debug and profiling **----------------------------------------------- ** ** register dump */ struct ncr_reg regdump; struct timeval regtime; /* ** Profiling data */ struct profile profile; u_long disc_phys; u_long disc_ref; /* ** The global header. ** Accessible to both the host and the ** script-processor. */ struct head header; /* ** The global control block. ** It's used only during the configuration phase. ** A target control block will be created ** after the first successful transfer. */ struct ccb ccb; /* ** message buffers. ** Should be longword aligned, ** because they're written with a ** COPY script command. */ u_char msgout[8]; u_char msgin [8]; u_long lastmsg; /* ** Buffer for STATUS_IN phase. */ u_char scratch; /* ** controller chip dependent maximal transfer width. */ u_char maxwide; /* ** lockout of execption handler call while starting command. */ u_char lock; }; /*========================================================== ** ** ** Script for NCR-Processor. ** ** Use ncr_script_fill() to create the variable parts. ** Use ncr_script_copy_and_bind() to make a copy and ** bind to physical addresses. ** ** **========================================================== ** ** We have to know the offsets of all labels before ** we reach them (for forward jumps). ** Therefore we declare a struct here. ** If you make changes inside the script, ** DONT FORGET TO CHANGE THE LENGTHS HERE! ** **---------------------------------------------------------- */ struct script { ncrcmd start [ 7]; ncrcmd start0 [ 2]; ncrcmd start1 [ 3]; ncrcmd startpos [ 1]; ncrcmd tryloop [MAX_START*5+2]; ncrcmd trysel [ 8]; ncrcmd skip [ 8]; ncrcmd skip2 [ 3]; ncrcmd idle [ 2]; ncrcmd select [ 24]; ncrcmd prepare [ 4]; ncrcmd loadpos [ 14]; ncrcmd prepare2 [ 24]; ncrcmd setmsg [ 5]; ncrcmd clrack [ 2]; ncrcmd dispatch [ 31]; ncrcmd no_data [ 17]; ncrcmd checkatn [ 10]; ncrcmd command [ 15]; ncrcmd status [ 27]; ncrcmd msg_in [ 26]; ncrcmd msg_bad [ 6]; ncrcmd msg_parity [ 6]; ncrcmd msg_reject [ 8]; ncrcmd msg_ign_residue [ 32]; ncrcmd msg_extended [ 18]; ncrcmd msg_ext_2 [ 18]; ncrcmd msg_wdtr [ 27]; ncrcmd msg_ext_3 [ 18]; ncrcmd msg_sdtr [ 27]; ncrcmd complete [ 13]; ncrcmd cleanup [ 12]; ncrcmd cleanup0 [ 11]; ncrcmd signal [ 10]; ncrcmd save_dp [ 5]; ncrcmd restore_dp [ 5]; ncrcmd disconnect [ 12]; ncrcmd disconnect0 [ 5]; ncrcmd disconnect1 [ 23]; ncrcmd msg_out [ 9]; ncrcmd msg_out_done [ 7]; ncrcmd msg_out_abort [ 10]; ncrcmd getcc [ 4]; ncrcmd getcc1 [ 5]; ncrcmd getcc2 [ 33]; ncrcmd getcc3 [ 10]; ncrcmd badgetcc [ 6]; ncrcmd reselect [ 12]; ncrcmd reselect2 [ 6]; ncrcmd resel_tmp [ 5]; ncrcmd resel_lun [ 18]; ncrcmd resel_tag [ 24]; ncrcmd data_in [MAX_SCATTER * 4 + 7]; ncrcmd data_out [MAX_SCATTER * 4 + 7]; ncrcmd aborttag [ 4]; ncrcmd abort [ 20]; ncrcmd snooptest [ 11]; }; /*========================================================== ** ** ** Function headers. ** ** **========================================================== */ #ifdef KERNEL static void ncr_alloc_ccb (ncb_p np, struct scsi_xfer * xp); static void ncr_complete (ncb_p np, ccb_p cp); static int ncr_delta (struct timeval * from, struct timeval * to); static void ncr_exception (ncb_p np); static void ncr_free_ccb (ncb_p np, ccb_p cp, int flags); static void ncr_getclock (ncb_p np); static ccb_p ncr_get_ccb (ncb_p np, u_long flags, u_long t,u_long l); static U_INT32 ncr_info (int unit); static void ncr_init (ncb_p np, char * msg, u_long code); static void ncr_int_ma (ncb_p np); static void ncr_int_sir (ncb_p np); static void ncr_int_sto (ncb_p np); #ifndef NEW_SCSICONF static u_long ncr_lookup (char* id); #endif static void ncr_min_phys (struct buf *bp); static void ncr_negotiate (struct ncb* np, struct tcb* tp); static void ncr_opennings (ncb_p np, lcb_p lp, struct scsi_xfer * xp); static void ncb_profile (ncb_p np, ccb_p cp); static void ncr_script_copy_and_bind (struct script * script, ncb_p np); static void ncr_script_fill (struct script * scr); static int ncr_scatter (struct dsb* phys,u_long vaddr,u_long datalen); static void ncr_setmaxtags (tcb_p tp, u_long usrtags); static void ncr_setsync (ncb_p np, ccb_p cp, u_char sxfer); static void ncr_settags (tcb_p tp, lcb_p lp); static void ncr_setwide (ncb_p np, ccb_p cp, u_char wide); static int ncr_show_msg (u_char * msg); static int ncr_snooptest (ncb_p np); static INT32 ncr_start (struct scsi_xfer *xp); static void ncr_timeout (ncb_p np); static void ncr_usercmd (ncb_p np); static void ncr_wakeup (ncb_p np, u_long code); #ifdef __NetBSD__ static int ncr_probe (struct device *, struct device *, void *); static void ncr_attach (struct device *, struct device *, void *); static int ncr_intr (ncb_p np); #else static int ncr_probe (pcici_t config_id); static int ncr_attach (pcici_t config_id); static int ncr_intr (int dev); #endif /*========================================================== ** ** ** Access to processor ports. ** ** **========================================================== */ #ifdef DIRTY #include #ifdef __NetBSD__ #include #include #define DELAY(x) delay(x) #else /* !__NetBSD__ */ #include #ifdef ANCIENT /* ** Doch das ist alles nur geklaut .. ** aus: 386bsd:/sys/i386/include/pio.h ** ** Mach Operating System ** Copyright (c) 1990 Carnegie-Mellon University ** All rights reserved. The CMU software License Agreement specifies ** the terms and conditions for use and redistribution. */ #undef inb #define inb(port) \ ({ unsigned char data; \ __asm __volatile("inb %1, %0": "=a" (data): "d" ((u_short)(port))); \ data; }) #undef outb #define outb(port, data) \ {__asm __volatile("outb %0, %1"::"a" ((u_char)(data)), "d" ((u_short)(port)));} #define disable_intr() \ {__asm __volatile("cli");} #define enable_intr() \ {__asm __volatile("sti");} #endif /* ANCIENT */ /*------------------------------------------------------------------ ** ** getirr: get a bit vector of the pending interrupts. ** ** NOTE: this is HIGHLY hardware dependent :-( ** **------------------------------------------------------------------ */ static u_long getirr (void) { u_long mask; disable_intr(); outb (IO_ICU2, 0x0a); mask = inb (IO_ICU2); outb (IO_ICU2, 0x0b); mask <<= 8; outb (IO_ICU1, 0x0a); mask|= inb (IO_ICU1); outb (IO_ICU1, 0x0b); enable_intr(); return (mask); } #endif /* __NetBSD__ */ #else /* DIRTY */ #define getirr() (0) #endif /* DIRTY */ #endif /* KERNEL */ /*========================================================== ** ** ** Global static data. ** ** **========================================================== */ static char ident[] = "\n$Id: ncr.c,v 1.2 1994/10/01 06:27:56 mycroft Exp $\n"; u_long ncr_version = NCR_VERSION + (u_long) sizeof (struct ncb) * (u_long) sizeof (struct ccb) * (u_long) sizeof (struct lcb) * (u_long) sizeof (struct tcb); #ifdef KERNEL #ifndef __NetBSD__ u_long ncr_units; u_long nncr=NNCR; ncb_p ncrp [NNCR]; #endif int ncr_cache; /* may _NOT_ be static */ /* ** SCSI cmd to get the SCSI sense data */ static u_char rs_cmd [6] = { 0x03, 0, 0, 0, sizeof (struct scsi_sense_data), 0 }; /*========================================================== ** ** ** Global static data: auto configure ** ** **========================================================== */ #define NCR_810_ID (0x00011000ul) #define NCR_825_ID (0x00031000ul) #ifdef __NetBSD__ struct cfdriver ncrcd = { NULL, "ncr", ncr_probe, ncr_attach, DV_DISK, sizeof(struct ncb) }; #else /* !__NetBSD__ */ struct pci_driver ncr810_device = { ncr_probe, ncr_attach, NCR_810_ID, "ncr 53c810 scsi", ncr_intr }; struct pci_driver ncr825_device = { ncr_probe, ncr_attach, NCR_825_ID, "ncr 53c825 scsi", ncr_intr }; #endif /* !__NetBSD__ */ #ifndef ANCIENT struct scsi_adapter ncr_switch = { ncr_start, ncr_min_phys, 0, 0, ncr_info, "ncr", }; struct scsi_device ncr_dev = { NULL, /* Use default error handler */ NULL, /* have a queue, served by this */ NULL, /* have no async handler */ NULL, /* Use default 'done' routine */ "ncr", }; #else /* ANCIENT */ struct scsi_switch ncr_switch = { ncr_start, ncr_min_phys, 0, 0, ncr_info, 0,0,0 }; #endif /* ANCIENT */ #ifdef __NetBSD__ #define ncr_name(np) (np->sc_dev.dv_xname) #else /* !__NetBSD__ */ static char *ncr_name (ncb_p np) { static char name[10]; int idx; for (idx = 0; idx < NNCR; idx++) if (ncrp[idx] == np) { sprintf(name, "ncr%d", idx); return (name); } return ("ncr?"); } #endif /*========================================================== ** ** ** Scripts for NCR-Processor. ** ** Use ncr_script_bind for binding to physical addresses. ** ** **========================================================== ** ** NADDR generates a reference to a field of the controller data. ** PADDR generates a reference to another part of the script. ** RADDR generates a reference to a script processor register. ** FADDR generates a reference to a script processor register ** with offset. ** **---------------------------------------------------------- */ #define RELOC_SOFTC 0x40000000 #define RELOC_LABEL 0x50000000 #define RELOC_REGISTER 0x60000000 #define RELOC_MASK 0xf0000000 #define NADDR(label) (RELOC_SOFTC | offsetof(struct ncb, label)) #define PADDR(label) (RELOC_LABEL | offsetof(struct script, label)) #define RADDR(label) (RELOC_REGISTER | REG(label)) #define FADDR(label,ofs)(RELOC_REGISTER | ((REG(label))+(ofs))) static struct script script0 = { /*--------------------------< START >-----------------------*/ { /* ** Claim to be still alive ... */ SCR_COPY (sizeof (((struct ncb *)0)->heartbeat)), (ncrcmd) &time.tv_sec, NADDR (heartbeat), /* ** Make data structure address invalid. ** clear SIGP. */ SCR_LOAD_REG (dsa, 0xff), 0, SCR_FROM_REG (ctest2), 0, }/*-------------------------< START0 >----------------------*/,{ /* ** Hook for interrupted GetConditionCode. ** Will be patched to ... IFTRUE by ** the interrupt handler. */ SCR_INT ^ IFFALSE (0), SIR_SENSE_RESTART, }/*-------------------------< START1 >----------------------*/,{ /* ** Hook for stalled start queue. ** Will be patched to IFTRUE by the interrupt handler. */ SCR_INT ^ IFFALSE (0), SIR_STALL_RESTART, /* ** Then jump to a certain point in tryloop. ** Due to the lack of indirect addressing the code ** is self modifying here. */ SCR_JUMP, }/*-------------------------< STARTPOS >--------------------*/,{ PADDR(tryloop), }/*-------------------------< TRYLOOP >---------------------*/,{ /* ** Load an entry of the start queue into dsa ** and try to start it by jumping to TRYSEL. ** ** Because the size depends on the ** #define MAX_START parameter, it is filled ** in at runtime. ** **----------------------------------------------------------- ** ** ##===========< I=0; i=========== ** || SCR_COPY (4), ** || NADDR (squeue[i]), ** || RADDR (dsa), ** || SCR_CALL, ** || PADDR (trysel), ** ##========================================== ** ** SCR_JUMP, ** PADDR(tryloop), ** **----------------------------------------------------------- */ 0 }/*-------------------------< TRYSEL >----------------------*/,{ /* ** Now: ** DSA: Address of a Data Structure ** or Address of the IDLE-Label. ** ** TEMP: Address of a script, which tries to ** start the NEXT entry. ** ** Save the TEMP register into the SCRATCHA register. ** Then copy the DSA to TEMP and RETURN. ** This is kind of an indirect jump. ** (The script processor has NO stack, so the ** CALL is actually a jump and link, and the ** RETURN is an indirect jump.) ** ** If the slot was empty, DSA contains the address ** of the IDLE part of this script. The processor ** jumps to IDLE and waits for a reselect. ** It will wake up and try the same slot again ** after the SIGP bit becomes set by the host. ** ** If the slot was not empty, DSA contains ** the address of the phys-part of a ccb. ** The processor jumps to this address. ** phys starts with head, ** head starts with launch, ** so actually the processor jumps to ** the lauch part. ** If the entry is scheduled to be executed, ** then launch contains a jump to SELECT. ** If it's not scheduled, it contains a jump to IDLE. */ SCR_COPY (4), RADDR (temp), RADDR (scratcha), SCR_COPY (4), RADDR (dsa), RADDR (temp), SCR_RETURN, 0 }/*-------------------------< SKIP >------------------------*/,{ /* ** This entry has been canceled. ** Next time use the next slot. */ SCR_COPY (4), RADDR (scratcha), PADDR (startpos), /* ** patch the launch field. ** should look like an idle process. */ SCR_COPY (4), RADDR (dsa), PADDR (skip2), SCR_COPY (8), PADDR (idle), }/*-------------------------< SKIP2 >-----------------------*/,{ 0, SCR_JUMP, PADDR(start), }/*-------------------------< IDLE >------------------------*/,{ /* ** Nothing to do? ** Wait for reselect. */ SCR_JUMP, PADDR(reselect), }/*-------------------------< SELECT >----------------------*/,{ /* ** DSA contains the address of a scheduled ** data structure. ** ** SCRATCHA contains the address of the script, ** which starts the next entry. ** ** Set Initiator mode. ** ** (Target mode is left as an exercise for the student) */ SCR_CLR (SCR_TRG), 0, SCR_LOAD_REG (HS_REG, 0xff), 0, /* ** And try to select this target. */ SCR_SEL_TBL_ATN ^ offsetof (struct dsb, select), PADDR (reselect), /* ** Now there are 4 possibilities: ** ** (1) The ncr looses arbitration. ** This is ok, because it will try again, ** when the bus becomes idle. ** (But beware of the timeout function!) ** ** (2) The ncr is reselected. ** Then the script processor takes the jump ** to the RESELECT label. ** ** (3) The ncr completes the selection. ** Then it will execute the next statement. ** ** (4) There is a selection timeout. ** Then the ncr should interrupt the host and stop. ** Unfortunately, it seems to continue execution ** of the script. But it will fail with an ** IID-interrupt on the next WHEN. */ SCR_JUMPR ^ IFTRUE (WHEN (SCR_MSG_IN)), 0, /* ** Save target id to ctest0 register */ SCR_FROM_REG (sdid), 0, SCR_TO_REG (ctest0), 0, /* ** Send the IDENTIFY and SIMPLE_TAG messages ** (and the M_X_SYNC_REQ message) */ SCR_MOVE_TBL ^ SCR_MSG_OUT, offsetof (struct dsb, smsg), SCR_JUMPR ^ IFTRUE (WHEN (SCR_MSG_OUT)), -16, SCR_CLR (SCR_ATN), 0, SCR_COPY (1), RADDR (sfbr), NADDR (lastmsg), /* ** Selection complete. ** Next time use the next slot. */ SCR_COPY (4), RADDR (scratcha), PADDR (startpos), }/*-------------------------< PREPARE >----------------------*/,{ /* ** The ncr doesn't have an indirect load ** or store command. So we have to ** copy part of the control block to a ** fixed place, where we can access it. ** ** We patch the address part of a ** COPY command with the DSA-register. */ SCR_COPY (4), RADDR (dsa), PADDR (loadpos), /* ** then we do the actual copy. */ SCR_COPY (sizeof (struct head)), /* ** continued after the next label ... */ }/*-------------------------< LOADPOS >---------------------*/,{ 0, NADDR (header), /* ** Mark this ccb as not scheduled. */ SCR_COPY (8), PADDR (idle), NADDR (header.launch), /* ** Set a time stamp for this selection */ SCR_COPY (sizeof (struct timeval)), (ncrcmd) &time, NADDR (header.stamp.select), /* ** load the savep (saved pointer) into ** the TEMP register (actual pointer) */ SCR_COPY (4), NADDR (header.savep), RADDR (temp), /* ** Initialize the status registers */ SCR_COPY (4), NADDR (header.status), RADDR (scr0), }/*-------------------------< PREPARE2 >---------------------*/,{ /* ** Load the synchronous mode register */ SCR_COPY (1), NADDR (sync_st), RADDR (sxfer), /* ** Load the wide mode and timing register */ SCR_COPY (1), NADDR (wide_st), RADDR (scntl3), /* ** Initialize the msgout buffer with a NOOP message. */ SCR_LOAD_REG (scratcha, M_NOOP), 0, SCR_COPY (1), RADDR (scratcha), NADDR (msgout), SCR_COPY (1), RADDR (scratcha), NADDR (msgin), /* ** Message in phase ? */ SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), PADDR (dispatch), /* ** Extended or reject message ? */ SCR_FROM_REG (sbdl), 0, SCR_JUMP ^ IFTRUE (DATA (M_EXTENDED)), PADDR (msg_in), SCR_JUMP ^ IFTRUE (DATA (M_REJECT)), PADDR (msg_reject), /* ** normal processing */ SCR_JUMP, PADDR (dispatch), }/*-------------------------< SETMSG >----------------------*/,{ SCR_COPY (1), RADDR (scratcha), NADDR (msgout), SCR_SET (SCR_ATN), 0, }/*-------------------------< CLRACK >----------------------*/,{ /* ** Terminate possible pending message phase. */ SCR_CLR (SCR_ACK), 0, }/*-----------------------< DISPATCH >----------------------*/,{ SCR_FROM_REG (HS_REG), 0, SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)), SIR_NEGO_FAILED, SCR_RETURN ^ IFTRUE (WHEN (SCR_DATA_OUT)), 0, SCR_RETURN ^ IFTRUE (IF (SCR_DATA_IN)), 0, SCR_JUMP ^ IFTRUE (IF (SCR_MSG_OUT)), PADDR (msg_out), SCR_JUMP ^ IFTRUE (IF (SCR_MSG_IN)), PADDR (msg_in), SCR_JUMP ^ IFTRUE (IF (SCR_COMMAND)), PADDR (command), SCR_JUMP ^ IFTRUE (IF (SCR_STATUS)), PADDR (status), /* ** Discard one illegal phase byte, if required. */ SCR_LOAD_REG (scratcha, XE_BAD_PHASE), 0, SCR_COPY (1), RADDR (scratcha), NADDR (xerr_st), SCR_JUMPR ^ IFFALSE (IF (SCR_ILG_OUT)), 8, SCR_MOVE_ABS (1) ^ SCR_ILG_OUT, NADDR (scratch), SCR_JUMPR ^ IFFALSE (IF (SCR_ILG_IN)), 8, SCR_MOVE_ABS (1) ^ SCR_ILG_IN, NADDR (scratch), SCR_JUMP, PADDR (dispatch), }/*-------------------------< NO_DATA >--------------------*/,{ /* ** The target wants to tranfer too much data ** or in the wrong direction. ** Remember that in extended error. */ SCR_LOAD_REG (scratcha, XE_EXTRA_DATA), 0, SCR_COPY (1), RADDR (scratcha), NADDR (xerr_st), /* ** Discard one data byte, if required. */ SCR_JUMPR ^ IFFALSE (WHEN (SCR_DATA_OUT)), 8, SCR_MOVE_ABS (1) ^ SCR_DATA_OUT, NADDR (scratch), SCR_JUMPR ^ IFFALSE (IF (SCR_DATA_IN)), 8, SCR_MOVE_ABS (1) ^ SCR_DATA_IN, NADDR (scratch), /* ** .. and repeat as required. */ SCR_CALL, PADDR (dispatch), SCR_JUMP, PADDR (no_data), }/*-------------------------< CHECKATN >--------------------*/,{ /* ** If AAP (bit 1 of scntl0 register) is set ** and a parity error is detected, ** the script processor asserts ATN. ** ** The target should switch to a MSG_OUT phase ** to get the message. */ SCR_FROM_REG (socl), 0, SCR_JUMP ^ IFFALSE (MASK (CATN, CATN)), PADDR (dispatch), /* ** count it */ SCR_REG_REG (PS_REG, SCR_ADD, 1), 0, /* ** Prepare a M_ID_ERROR message ** (initiator detected error). ** The target should retry the transfer. */ SCR_LOAD_REG (scratcha, M_ID_ERROR), 0, SCR_JUMP, PADDR (setmsg), }/*-------------------------< COMMAND >--------------------*/,{ /* ** If this is not a GETCC transfer ... */ SCR_FROM_REG (SS_REG), 0, /*<<<*/ SCR_JUMPR ^ IFTRUE (DATA (S_CHECK_COND)), 28, /* ** ... set a timestamp ... */ SCR_COPY (sizeof (struct timeval)), (ncrcmd) &time, NADDR (header.stamp.command), /* ** ... and send the command */ SCR_MOVE_TBL ^ SCR_COMMAND, offsetof (struct dsb, cmd), SCR_JUMP, PADDR (dispatch), /* ** Send the GETCC command */ /*>>>*/ SCR_MOVE_ABS (6) ^ SCR_COMMAND, (ncrcmd) &rs_cmd, SCR_JUMP, PADDR (dispatch), }/*-------------------------< STATUS >--------------------*/,{ /* ** set the timestamp. */ SCR_COPY (sizeof (struct timeval)), (ncrcmd) &time, NADDR (header.stamp.status), /* ** If this is a GETCC transfer, */ SCR_FROM_REG (SS_REG), 0, /*<<<*/ SCR_JUMPR ^ IFFALSE (DATA (S_CHECK_COND)), 40, /* ** get the status */ SCR_MOVE_ABS (1) ^ SCR_STATUS, NADDR (scratch), /* ** Save status to scsi_status. ** Mark as complete. ** And wait for disconnect. */ SCR_TO_REG (SS_REG), 0, SCR_REG_REG (SS_REG, SCR_OR, S_SENSE), 0, SCR_LOAD_REG (HS_REG, HS_COMPLETE), 0, SCR_JUMP, PADDR (checkatn), /* ** If it was no GETCC transfer, ** save the status to scsi_status. */ /*>>>*/ SCR_MOVE_ABS (1) ^ SCR_STATUS, NADDR (scratch), SCR_TO_REG (SS_REG), 0, /* ** if it was no check condition ... */ SCR_JUMP ^ IFTRUE (DATA (S_CHECK_COND)), PADDR (checkatn), /* ** ... mark as complete. */ SCR_LOAD_REG (HS_REG, HS_COMPLETE), 0, SCR_JUMP, PADDR (checkatn), }/*-------------------------< MSG_IN >--------------------*/,{ /* ** Get the first byte of the message ** and save it to SCRATCHA. ** ** The script processor doesn't negate the ** ACK signal after this transfer. */ SCR_MOVE_ABS (1) ^ SCR_MSG_IN, NADDR (msgin[0]), /* ** Check for message parity error. */ SCR_TO_REG (scratcha), 0, SCR_FROM_REG (socl), 0, SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)), PADDR (msg_parity), SCR_FROM_REG (scratcha), 0, /* ** Parity was ok, handle this message. */ SCR_JUMP ^ IFTRUE (DATA (M_COMPLETE)), PADDR (complete), SCR_JUMP ^ IFTRUE (DATA (M_SAVE_DP)), PADDR (save_dp), SCR_JUMP ^ IFTRUE (DATA (M_RESTORE_DP)), PADDR (restore_dp), SCR_JUMP ^ IFTRUE (DATA (M_DISCONNECT)), PADDR (disconnect), SCR_JUMP ^ IFTRUE (DATA (M_EXTENDED)), PADDR (msg_extended), SCR_JUMP ^ IFTRUE (DATA (M_NOOP)), PADDR (clrack), SCR_JUMP ^ IFTRUE (DATA (M_REJECT)), PADDR (msg_reject), SCR_JUMP ^ IFTRUE (DATA (M_IGN_RESIDUE)), PADDR (msg_ign_residue), /* ** Rest of the messages left as ** an exercise ... ** ** Unimplemented messages: ** fall through to MSG_BAD. */ }/*-------------------------< MSG_BAD >------------------*/,{ /* ** unimplemented message - reject it. */ SCR_INT, SIR_REJECT_SENT, SCR_LOAD_REG (scratcha, M_REJECT), 0, SCR_JUMP, PADDR (setmsg), }/*-------------------------< MSG_PARITY >---------------*/,{ /* ** count it */ SCR_REG_REG (PS_REG, SCR_ADD, 0x01), 0, /* ** send a "message parity error" message. */ SCR_LOAD_REG (scratcha, M_PARITY), 0, SCR_JUMP, PADDR (setmsg), }/*-------------------------< MSG_REJECT >---------------*/,{ /* ** If a negotiation was in progress, ** negotiation failed. */ SCR_FROM_REG (HS_REG), 0, SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)), SIR_NEGO_FAILED, /* ** else make host log this message */ SCR_INT ^ IFFALSE (DATA (HS_NEGOTIATE)), SIR_REJECT_RECEIVED, SCR_JUMP, PADDR (clrack), }/*-------------------------< MSG_IGN_RESIDUE >----------*/,{ /* ** Terminate cycle */ SCR_CLR (SCR_ACK), 0, SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), PADDR (dispatch), /* ** get residue size. */ SCR_MOVE_ABS (1) ^ SCR_MSG_IN, NADDR (msgin[1]), /* ** Check for message parity error. */ SCR_TO_REG (scratcha), 0, SCR_FROM_REG (socl), 0, SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)), PADDR (msg_parity), SCR_FROM_REG (scratcha), 0, /* ** Size is 0 .. ignore message. */ SCR_JUMP ^ IFTRUE (DATA (0)), PADDR (clrack), /* ** Size is not 1 .. have to interrupt. */ /*<<<*/ SCR_JUMPR ^ IFFALSE (DATA (1)), 40, /* ** Check for residue byte in swide register */ SCR_FROM_REG (scntl2), 0, /*<<<*/ SCR_JUMPR ^ IFFALSE (MASK (WSR, WSR)), 16, /* ** There IS data in the swide register. ** Discard it. */ SCR_REG_REG (scntl2, SCR_OR, WSR), 0, SCR_JUMP, PADDR (clrack), /* ** Load again the size to the sfbr register. */ /*>>>*/ SCR_FROM_REG (scratcha), 0, /*>>>*/ SCR_INT, SIR_IGN_RESIDUE, SCR_JUMP, PADDR (clrack), }/*-------------------------< MSG_EXTENDED >-------------*/,{ /* ** Terminate cycle */ SCR_CLR (SCR_ACK), 0, SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), PADDR (dispatch), /* ** get length. */ SCR_MOVE_ABS (1) ^ SCR_MSG_IN, NADDR (msgin[1]), /* ** Check for message parity error. */ SCR_TO_REG (scratcha), 0, SCR_FROM_REG (socl), 0, SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)), PADDR (msg_parity), SCR_FROM_REG (scratcha), 0, /* */ SCR_JUMP ^ IFTRUE (DATA (3)), PADDR (msg_ext_3), SCR_JUMP ^ IFFALSE (DATA (2)), PADDR (msg_bad), }/*-------------------------< MSG_EXT_2 >----------------*/,{ SCR_CLR (SCR_ACK), 0, SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), PADDR (dispatch), /* ** get extended message code. */ SCR_MOVE_ABS (1) ^ SCR_MSG_IN, NADDR (msgin[2]), /* ** Check for message parity error. */ SCR_TO_REG (scratcha), 0, SCR_FROM_REG (socl), 0, SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)), PADDR (msg_parity), SCR_FROM_REG (scratcha), 0, SCR_JUMP ^ IFTRUE (DATA (M_X_WIDE_REQ)), PADDR (msg_wdtr), /* ** unknown extended message */ SCR_JUMP, PADDR (msg_bad) }/*-------------------------< MSG_WDTR >-----------------*/,{ SCR_CLR (SCR_ACK), 0, SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), PADDR (dispatch), /* ** get data bus width */ SCR_MOVE_ABS (1) ^ SCR_MSG_IN, NADDR (msgin[3]), SCR_FROM_REG (socl), 0, SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)), PADDR (msg_parity), /* ** let the host do the real work. */ SCR_INT, SIR_NEGO_WIDE, /* ** let the target fetch our answer. */ SCR_SET (SCR_ATN), 0, SCR_CLR (SCR_ACK), 0, SCR_INT ^ IFFALSE (WHEN (SCR_MSG_OUT)), SIR_NEGO_PROTO, /* ** Send the M_X_WIDE_REQ */ SCR_MOVE_ABS (4) ^ SCR_MSG_OUT, NADDR (msgout), SCR_CLR (SCR_ATN), 0, SCR_COPY (1), RADDR (sfbr), NADDR (lastmsg), SCR_JUMP, PADDR (msg_out_done), }/*-------------------------< MSG_EXT_3 >----------------*/,{ SCR_CLR (SCR_ACK), 0, SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), PADDR (dispatch), /* ** get extended message code. */ SCR_MOVE_ABS (1) ^ SCR_MSG_IN, NADDR (msgin[2]), /* ** Check for message parity error. */ SCR_TO_REG (scratcha), 0, SCR_FROM_REG (socl), 0, SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)), PADDR (msg_parity), SCR_FROM_REG (scratcha), 0, SCR_JUMP ^ IFTRUE (DATA (M_X_SYNC_REQ)), PADDR (msg_sdtr), /* ** unknown extended message */ SCR_JUMP, PADDR (msg_bad) }/*-------------------------< MSG_SDTR >-----------------*/,{ SCR_CLR (SCR_ACK), 0, SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), PADDR (dispatch), /* ** get period and offset */ SCR_MOVE_ABS (2) ^ SCR_MSG_IN, NADDR (msgin[3]), SCR_FROM_REG (socl), 0, SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)), PADDR (msg_parity), /* ** let the host do the real work. */ SCR_INT, SIR_NEGO_SYNC, /* ** let the target fetch our answer. */ SCR_SET (SCR_ATN), 0, SCR_CLR (SCR_ACK), 0, SCR_INT ^ IFFALSE (WHEN (SCR_MSG_OUT)), SIR_NEGO_PROTO, /* ** Send the M_X_SYNC_REQ */ SCR_MOVE_ABS (5) ^ SCR_MSG_OUT, NADDR (msgout), SCR_CLR (SCR_ATN), 0, SCR_COPY (1), RADDR (sfbr), NADDR (lastmsg), SCR_JUMP, PADDR (msg_out_done), }/*-------------------------< COMPLETE >-----------------*/,{ /* ** Complete message. ** ** If it's not the get condition code, ** copy TEMP register to LASTP in header. */ SCR_FROM_REG (SS_REG), 0, /*<<<*/ SCR_JUMPR ^ IFTRUE (MASK (S_SENSE, S_SENSE)), 12, SCR_COPY (4), RADDR (temp), NADDR (header.lastp), /*>>>*/ /* ** When we terminate the cycle by clearing ACK, ** the target may disconnect immediately. ** ** We don't want to be told of an ** "unexpected disconnect", ** so we disable this feature. */ SCR_REG_REG (scntl2, SCR_AND, 0x7f), 0, /* ** Terminate cycle ... */ SCR_CLR (SCR_ACK), 0, /* ** ... and wait for the disconnect. */ SCR_WAIT_DISC, 0, }/*-------------------------< CLEANUP >-------------------*/,{ /* ** dsa: Pointer to ccb ** or xxxxxxFF (no ccb) ** ** HS_REG: Host-Status (<>0!) */ SCR_FROM_REG (dsa), 0, SCR_JUMP ^ IFTRUE (DATA (0xff)), PADDR (signal), /* ** dsa is valid. ** save the status registers */ SCR_COPY (4), RADDR (scr0), NADDR (header.status), /* ** and copy back the header to the ccb. */ SCR_COPY (4), RADDR (dsa), PADDR (cleanup0), SCR_COPY (sizeof (struct head)), NADDR (header), }/*-------------------------< CLEANUP0 >--------------------*/,{ 0, /* ** If command resulted in "check condition" ** status and is not yet completed, ** try to get the condition code. */ SCR_FROM_REG (HS_REG), 0, /*<<<*/ SCR_JUMPR ^ IFFALSE (MASK (0, HS_DONEMASK)), 16, SCR_FROM_REG (SS_REG), 0, SCR_JUMP ^ IFTRUE (DATA (S_CHECK_COND)), PADDR(getcc2), /* ** And make the DSA register invalid. */ /*>>>*/ SCR_LOAD_REG (dsa, 0xff), /* invalid */ 0, }/*-------------------------< SIGNAL >----------------------*/,{ /* ** if status = queue full, ** reinsert in startqueue and stall queue. */ SCR_FROM_REG (SS_REG), 0, SCR_INT ^ IFTRUE (DATA (S_QUEUE_FULL)), SIR_STALL_QUEUE, /* ** if job completed ... */ SCR_FROM_REG (HS_REG), 0, /* ** ... signal completion to the host */ SCR_INT_FLY ^ IFFALSE (MASK (0, HS_DONEMASK)), 0, /* ** Auf zu neuen Schandtaten! */ SCR_JUMP, PADDR(start), }/*-------------------------< SAVE_DP >------------------*/,{ /* ** SAVE_DP message: ** Copy TEMP register to SAVEP in header. */ SCR_COPY (4), RADDR (temp), NADDR (header.savep), SCR_JUMP, PADDR (clrack), }/*-------------------------< RESTORE_DP >---------------*/,{ /* ** RESTORE_DP message: ** Copy SAVEP in header to TEMP register. */ SCR_COPY (4), NADDR (header.savep), RADDR (temp), SCR_JUMP, PADDR (clrack), }/*-------------------------< DISCONNECT >---------------*/,{ /* ** If QUIRK_AUTOSAVE is set, ** do an "save pointer" operation. */ SCR_FROM_REG (QU_REG), 0, /*<<<*/ SCR_JUMPR ^ IFFALSE (MASK (QUIRK_AUTOSAVE, QUIRK_AUTOSAVE)), 12, /* ** like SAVE_DP message: ** Copy TEMP register to SAVEP in header. */ SCR_COPY (4), RADDR (temp), NADDR (header.savep), /*>>>*/ /* ** Check if temp==savep or temp==goalp: ** if not, log a missing save pointer message. ** In fact, it's a comparation mod 256. ** ** Hmmm, I hadn't thought that I would be urged to ** write this kind of ugly self modifying code. ** ** It's unbelievable, but the ncr53c8xx isn't able ** to subtract one register from another. */ SCR_FROM_REG (temp), 0, /* ** You are not expected to understand this .. */ SCR_COPY (1), NADDR (header.savep), PADDR (disconnect0), }/*-------------------------< DISCONNECT0 >--------------*/,{ /*<<<*/ SCR_JUMPR ^ IFTRUE (DATA (1)), 20, /* ** neither this */ SCR_COPY (1), NADDR (header.goalp), PADDR (disconnect1), }/*-------------------------< DISCONNECT1 >--------------*/,{ SCR_INT ^ IFFALSE (DATA (1)), SIR_MISSING_SAVE, /*>>>*/ /* ** DISCONNECTing ... ** ** Disable the "unexpected disconnect" feature. */ SCR_REG_REG (scntl2, SCR_AND, 0x7f), 0, SCR_CLR (SCR_ACK), 0, /* ** Wait for the disconnect. */ SCR_WAIT_DISC, 0, /* ** Profiling: ** Set a time stamp, ** and count the disconnects. */ SCR_COPY (sizeof (struct timeval)), (ncrcmd) &time, NADDR (header.stamp.disconnect), SCR_COPY (4), NADDR (disc_phys), RADDR (temp), SCR_REG_REG (temp, SCR_ADD, 0x01), 0, SCR_COPY (4), RADDR (temp), NADDR (disc_phys), /* ** Status is: DISCONNECTED. */ SCR_LOAD_REG (HS_REG, HS_DISCONNECT), 0, SCR_JUMP, PADDR (cleanup), }/*-------------------------< MSG_OUT >-------------------*/,{ /* ** The target requests a message. ** First remove ATN so the target will ** not continue fetching messages. */ SCR_MOVE_ABS (1) ^ SCR_MSG_OUT, NADDR (msgout), SCR_COPY (1), RADDR (sfbr), NADDR (lastmsg), /* ** If it was no ABORT message ... */ SCR_JUMP ^ IFTRUE (DATA (M_ABORT)), PADDR (msg_out_abort), /* ** ... wait for the next phase ** if it's a message out, send it again, ... */ SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_OUT)), PADDR (msg_out), }/*-------------------------< MSG_OUT_DONE >--------------*/,{ /* ** ... else clear the message ... */ SCR_LOAD_REG (scratcha, M_NOOP), 0, SCR_COPY (4), RADDR (scratcha), NADDR (msgout), /* ** ... and process the next phase */ SCR_JUMP, PADDR (dispatch), }/*-------------------------< MSG_OUT_ABORT >-------------*/,{ /* ** After ABORT message, ** ** expect an immediate disconnect, ... */ SCR_REG_REG (scntl2, SCR_AND, 0x7f), 0, SCR_CLR (SCR_ACK), 0, SCR_WAIT_DISC, 0, /* ** ... and set the status to "ABORTED" */ SCR_LOAD_REG (HS_REG, HS_ABORTED), 0, SCR_JUMP, PADDR (cleanup), }/*-------------------------< GETCC >-----------------------*/,{ /* ** The ncr doesn't have an indirect load ** or store command. So we have to ** copy part of the control block to a ** fixed place, where we can modify it. ** ** We patch the address part of a COPY command ** with the address of the dsa register ... */ SCR_COPY (4), RADDR (dsa), PADDR (getcc1), /* ** ... then we do the actual copy. */ SCR_COPY (sizeof (struct head)), }/*-------------------------< GETCC1 >----------------------*/,{ 0, NADDR (header), /* ** Initialize the status registers */ SCR_COPY (4), NADDR (header.status), RADDR (scr0), }/*-------------------------< GETCC2 >----------------------*/,{ /* ** Get the condition code from a target. ** ** DSA points to a data structure. ** Set TEMP to the script location ** that receives the condition code. ** ** Because there is no script command ** to load a longword into a register, ** we use a CALL command. */ /*<<<*/ SCR_CALLR, 24, /* ** Get the condition code. */ SCR_MOVE_TBL ^ SCR_DATA_IN, offsetof (struct dsb, sense), /* ** No data phase may follow! */ SCR_CALL, PADDR (checkatn), SCR_JUMP, PADDR (no_data), /*>>>*/ /* ** The CALL jumps to this point. ** Prepare for a RESTORE_POINTER message. ** Save the TEMP register into the saved pointer. */ SCR_COPY (4), RADDR (temp), NADDR (header.savep), /* ** Load scratcha, because in case of a selection timeout, ** the host will expect a new value for startpos in ** the scratcha register. */ SCR_COPY (4), PADDR (startpos), RADDR (scratcha), /* ** If QUIRK_NOMSG is set, select without ATN. ** and don't send a message. */ SCR_FROM_REG (QU_REG), 0, SCR_JUMP ^ IFTRUE (MASK (QUIRK_NOMSG, QUIRK_NOMSG)), PADDR(getcc3), /* ** Then try to connect to the target. ** If we are reselected, special treatment ** of the current job is required before ** accepting the reselection. */ SCR_SEL_TBL_ATN ^ offsetof (struct dsb, select), PADDR(badgetcc), /* ** save target id. */ SCR_FROM_REG (sdid), 0, SCR_TO_REG (ctest0), 0, /* ** Send the IDENTIFY message. ** In case of short transfer, remove ATN. */ SCR_MOVE_TBL ^ SCR_MSG_OUT, offsetof (struct dsb, smsg2), SCR_CLR (SCR_ATN), 0, /* ** save the first byte of the message. */ SCR_COPY (1), RADDR (sfbr), NADDR (lastmsg), SCR_JUMP, PADDR (prepare2), }/*-------------------------< GETCC3 >----------------------*/,{ /* ** Try to connect to the target. ** If we are reselected, special treatment ** of the current job is required before ** accepting the reselection. ** ** Silly target won't accept a message. ** Select without ATN. */ SCR_SEL_TBL ^ offsetof (struct dsb, select), PADDR(badgetcc), /* ** save target id. */ SCR_FROM_REG (sdid), 0, SCR_TO_REG (ctest0), 0, /* ** Force error if selection timeout */ SCR_JUMPR ^ IFTRUE (WHEN (SCR_MSG_IN)), 0, /* ** don't negotiate. */ SCR_JUMP, PADDR (prepare2), }/*------------------------< BADGETCC >---------------------*/,{ /* ** If SIGP was set, clear it and try again. */ SCR_FROM_REG (ctest2), 0, SCR_JUMP ^ IFTRUE (MASK (CSIGP,CSIGP)), PADDR (getcc2), SCR_INT, SIR_SENSE_FAILED, }/*-------------------------< RESELECT >--------------------*/,{ /* ** make the DSA invalid. */ SCR_LOAD_REG (dsa, 0xff), 0, SCR_CLR (SCR_TRG), 0, /* ** Sleep waiting for a reselection. ** If SIGP is set, special treatment. ** ** Zu allem bereit .. */ SCR_WAIT_RESEL, PADDR(reselect2), /* ** ... zu nichts zu gebrauchen ? ** ** load the target id into the SFBR ** and jump to the control block. ** ** Look at the declarations of ** - struct ncb ** - struct tcb ** - struct lcb ** - struct ccb ** to understand what's going on. */ SCR_REG_SFBR (ssid, SCR_AND, 0x87), 0, SCR_TO_REG (ctest0), 0, SCR_JUMP, NADDR (jump_tcb), }/*-------------------------< RESELECT2 >-------------------*/,{ /* ** If it's not connected :( ** -> interrupted by SIGP bit. ** Jump to start. */ SCR_FROM_REG (ctest2), 0, SCR_JUMP ^ IFTRUE (MASK (CSIGP,CSIGP)), PADDR (start), SCR_JUMP, PADDR (reselect), }/*-------------------------< RESEL_TMP >-------------------*/,{ /* ** The return address in TEMP ** is in fact the data structure address, ** so copy it to the DSA register. */ SCR_COPY (4), RADDR (temp), RADDR (dsa), SCR_JUMP, PADDR (prepare), }/*-------------------------< RESEL_LUN >-------------------*/,{ /* ** come back to this point ** to get an IDENTIFY message ** Wait for a msg_in phase. */ /*<<<*/ SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)), 48, /* ** message phase ** It's not a sony, it's a trick: ** read the data without acknowledging it. */ SCR_FROM_REG (sbdl), 0, /*<<<*/ SCR_JUMPR ^ IFFALSE (MASK (M_IDENTIFY, 0x98)), 32, /* ** It WAS an Identify message. ** get it and ack it! */ SCR_MOVE_ABS (1) ^ SCR_MSG_IN, NADDR (msgin), SCR_CLR (SCR_ACK), 0, /* ** Mask out the LUN. */ SCR_REG_REG (sfbr, SCR_AND, 0x07), 0, SCR_RETURN, 0, /* ** No message phase or no IDENTIFY message: ** return 0. */ /*>>>*/ SCR_LOAD_SFBR (0), 0, SCR_RETURN, 0, }/*-------------------------< RESEL_TAG >-------------------*/,{ /* ** come back to this point ** to get a SIMPLE_TAG message ** Wait for a MSG_IN phase. */ /*<<<*/ SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)), 64, /* ** message phase ** It's a trick - read the data ** without acknowledging it. */ SCR_FROM_REG (sbdl), 0, /*<<<*/ SCR_JUMPR ^ IFFALSE (DATA (M_SIMPLE_TAG)), 48, /* ** It WAS a SIMPLE_TAG message. ** get it and ack it! */ SCR_MOVE_ABS (1) ^ SCR_MSG_IN, NADDR (msgin), SCR_CLR (SCR_ACK), 0, /* ** Wait for the second byte (the tag) */ /*<<<*/ SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)), 24, /* ** Get it and ack it! */ SCR_MOVE_ABS (1) ^ SCR_MSG_IN, NADDR (msgin), SCR_CLR (SCR_ACK|SCR_CARRY), 0, SCR_RETURN, 0, /* ** No message phase or no SIMPLE_TAG message ** or no second byte: return 0. */ /*>>>*/ SCR_LOAD_SFBR (0), 0, SCR_SET (SCR_CARRY), 0, SCR_RETURN, 0, }/*-------------------------< DATA_IN >--------------------*/,{ /* ** Because the size depends on the ** #define MAX_SCATTER parameter, ** it is filled in at runtime. ** ** SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_IN)), ** PADDR (no_data), ** SCR_COPY (sizeof (struct timeval)), ** (ncrcmd) &time, ** NADDR (header.stamp.data), ** SCR_MOVE_TBL ^ SCR_DATA_IN, ** offsetof (struct dsb, data[ 0]), ** ** ##===========< i=1; i========= ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)), ** || PADDR (checkatn), ** || SCR_MOVE_TBL ^ SCR_DATA_IN, ** || offsetof (struct dsb, data[ i]), ** ##========================================== ** ** SCR_CALL, ** PADDR (checkatn), ** SCR_JUMP, ** PADDR (no_data), */ 0 }/*-------------------------< DATA_OUT >-------------------*/,{ /* ** Because the size depends on the ** #define MAX_SCATTER parameter, ** it is filled in at runtime. ** ** SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_IN)), ** PADDR (no_data), ** SCR_COPY (sizeof (struct timeval)), ** (ncrcmd) &time, ** NADDR (header.stamp.data), ** SCR_MOVE_TBL ^ SCR_DATA_OUT, ** offsetof (struct dsb, data[ 0]), ** ** ##===========< i=1; i========= ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)), ** || PADDR (dispatch), ** || SCR_MOVE_TBL ^ SCR_DATA_OUT, ** || offsetof (struct dsb, data[ i]), ** ##========================================== ** ** SCR_CALL, ** PADDR (dispatch), ** SCR_JUMP, ** PADDR (no_data), ** **--------------------------------------------------------- */ (u_long)&ident }/*-------------------------< ABORTTAG >-------------------*/,{ /* ** Abort a bad reselection. ** Set the message to ABORT vs. ABORT_TAG */ SCR_LOAD_REG (scratcha, M_ABORT_TAG), 0, SCR_JUMPR ^ IFFALSE (CARRYSET), 8, }/*-------------------------< ABORT >----------------------*/,{ SCR_LOAD_REG (scratcha, M_ABORT), 0, SCR_COPY (1), RADDR (scratcha), NADDR (msgout), SCR_SET (SCR_ATN), 0, SCR_CLR (SCR_ACK), 0, /* ** and send it. ** we expect an immediate disconnect */ SCR_REG_REG (scntl2, SCR_AND, 0x7f), 0, SCR_MOVE_ABS (1) ^ SCR_MSG_OUT, NADDR (msgout), SCR_COPY (1), RADDR (sfbr), NADDR (lastmsg), SCR_WAIT_DISC, 0, SCR_JUMP, PADDR (start), }/*-------------------------< SNOOPTEST >-------------------*/,{ /* ** Read the variable. */ SCR_COPY (4), (ncrcmd) &ncr_cache, RADDR (scratcha), /* ** Write the variable. */ SCR_COPY (4), RADDR (temp), (ncrcmd) &ncr_cache, /* ** Read back the variable. */ SCR_COPY (4), (ncrcmd) &ncr_cache, RADDR (temp), /* ** And stop. */ SCR_INT, 99, }/*--------------------------------------------------------*/ }; /*========================================================== ** ** ** Fill in #define dependent parts of the script ** ** **========================================================== */ void ncr_script_fill (struct script * scr) { int i; ncrcmd *p; p = scr->tryloop; for (i=0; itryloop + sizeof (scr->tryloop)); p = scr->data_in; *p++ =SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_IN)); *p++ =PADDR (no_data); *p++ =SCR_COPY (sizeof (struct timeval)); *p++ =(ncrcmd) &time; *p++ =NADDR (header.stamp.data); *p++ =SCR_MOVE_TBL ^ SCR_DATA_IN; *p++ =offsetof (struct dsb, data[ 0]); for (i=1; idata_in + sizeof (scr->data_in)); p = scr->data_out; *p++ =SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_OUT)); *p++ =PADDR (no_data); *p++ =SCR_COPY (sizeof (struct timeval)); *p++ =(ncrcmd) &time; *p++ =NADDR (header.stamp.data); *p++ =SCR_MOVE_TBL ^ SCR_DATA_OUT; *p++ =offsetof (struct dsb, data[ 0]); for (i=1; idata_out + sizeof (scr->data_out)); } /*========================================================== ** ** ** Copy and rebind a script. ** ** **========================================================== */ static void ncr_script_copy_and_bind (struct script *script, ncb_p np) { ncrcmd opcode, new, old; ncrcmd *src, *dst, *start, *end; int relocs; np->script = (struct script *) malloc (sizeof (struct script), M_DEVBUF, M_WAITOK); np->p_script = vtophys(np->script); src = script->start; dst = np->script->start; start = src; end = src + (sizeof(struct script) / 4); while (src < end) { *dst++ = opcode = *src++; /* ** If we forget to change the length ** in struct script, a field will be ** padded with 0. This is an illegal ** command. */ if (opcode == 0) { printf ("%s: ERROR0 IN SCRIPT at %d.\n", ncr_name(np), src-start-1); DELAY (1000000); }; #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_SCRIPT) printf ("%x: <%x>\n", (u_long)(src-1), opcode); #endif /* SCSI_NCR_DEBUG */ /* ** We don't have to decode ALL commands */ switch (opcode >> 28) { case 0xc: /* ** COPY has TWO arguments. */ relocs = 2; if ((src[0] ^ src[1]) & 3) { printf ("%s: ERROR1 IN SCRIPT at %d.\n", ncr_name(np), src-start-1); DELAY (1000000); }; break; case 0x0: /* ** MOVE (absolute address) */ relocs = 1; break; case 0x8: /* ** JUMP / CALL ** dont't relocate if relative :-) */ if (opcode & 0x00800000) relocs = 0; else relocs = 1; break; case 0x4: case 0x5: case 0x6: case 0x7: relocs = 1; break; default: relocs = 0; break; }; if (relocs) { while (relocs--) { old = *src++; switch (old & RELOC_MASK) { case RELOC_REGISTER: new = (old & ~RELOC_MASK) + np->paddr; break; case RELOC_LABEL: new = (old & ~RELOC_MASK) + vtophys(np->script); break; case RELOC_SOFTC: new = (old & ~RELOC_MASK) + vtophys(np); break; case 0: /* Don't relocate a 0 address. */ if (old == 0) { new = old; break; } /* fall through */ default: new = vtophys(old); break; } *dst++ = new; } } else *dst++ = *src++; }; } /*========================================================== ** ** ** Auto configuration. ** ** **========================================================== */ /*---------------------------------------------------------- ** ** Reduce the transfer length to the max value ** we can transfer safely. ** ** Reading a block greater then MAX_SIZE from the ** raw (character) device exercises a memory leak ** in the vm subsystem. This is common to ALL devices. ** We have submitted a description of this bug to ** . ** It should be fixed in the current release. ** **---------------------------------------------------------- */ void ncr_min_phys (struct buf *bp) { if (bp->b_bcount > MAX_SIZE) bp->b_bcount = MAX_SIZE; } /*---------------------------------------------------------- ** ** Maximal number of outstanding requests per target. ** **---------------------------------------------------------- */ U_INT32 ncr_info (int unit) { return (1); /* may be changed later */ } /*---------------------------------------------------------- ** ** Probe the hostadapter. ** **---------------------------------------------------------- */ #ifdef __NetBSD__ int ncr_probe(parent, self, aux) struct device *parent, *self; void *aux; { struct cfdata *cf = self->dv_cfdata; struct pci_attach_args *pa = aux; if (!pci_targmatch(cf, pa)) return 0; if (pa->pa_id != NCR_810_ID && pa->pa_id != NCR_825_ID) return 0; return 1; } #else /* !__NetBSD__ */ static int ncr_probe(pcici_t config_id) { if (ncr_units >= NNCR) return (-1); return (ncr_units); } #endif /* !__NetBSD__ */ /*========================================================== ** ** ** Auto configuration: attach and init a host adapter. ** ** **========================================================== */ #define MIN_ASYNC_PD 40 #define MIN_SYNC_PD 20 #ifdef __NetBSD__ int ncr_print() { } void ncr_attach(parent, self, aux) struct device *parent, *self; void *aux; { struct pci_attach_args *pa = aux; int retval; ncb_p np = (void *)self; /* ** XXX ** Perhaps try to figure what which model chip it is and print that ** out. */ printf("\n"); /* ** Try to map the controller chip to ** virtual and physical memory. */ retval = pci_map_mem(pa->pa_tag, 0x14, &np->vaddr, &np->paddr); if (retval) return; np->sc_ih.ih_fun = ncr_intr; np->sc_ih.ih_arg = np; np->sc_ih.ih_level = IPL_BIO; retval = pci_map_int(pa->pa_tag, &np->sc_ih); if (retval) return; #else /* !__NetBSD__ */ static int ncr_attach (pcici_t config_id) { int retval; ncb_p np = ncrp[ncr_units]; /* ** allocate structure */ if (!np) { np = (ncb_p) malloc (sizeof (struct ncb), M_DEVBUF, M_NOWAIT); if (!np) return (0); ncrp[ncr_units]=np; } /* ** initialize structure. */ bzero (np, sizeof (*np)); /* ** Try to map the controller chip to ** virtual and physical memory. */ retval = pci_map_mem (config_id, 0x14, &np->vaddr, &np->paddr); if (retval) { printf ("%s: pci_map_mem failed.\n", ncr_name (np)); return (retval); }; #endif /* !__NetBSD__ */ /* ** Do chip dependent initialization. */ #ifdef __NetBSD__ switch (pa->pa_id) { #else switch (pci_conf_read (config_id, PCI_ID_REG)) { #endif case NCR_810_ID: np->maxwide = 0; break; case NCR_825_ID: np->maxwide = 1; break; } /* ** Patch script to physical addresses */ ncr_script_fill (&script0); ncr_script_copy_and_bind (&script0, np); /* ** init data structure */ np -> jump_tcb.l_cmd = SCR_JUMP ; np -> jump_tcb.l_paddr = vtophys (&np->script->abort); /* ** Make the controller's registers available. ** Now the INB INW INL OUTB OUTW OUTL macros ** can be used safely. */ np->reg = (struct ncr_reg*) np->vaddr; /* ** Get SCSI addr of host adapter (set by bios?). */ np->myaddr = INB(nc_scid) & 0x07; if (!np->myaddr) np->myaddr = SCSI_NCR_MYADDR; /* ** Get the value of the chip's clock. ** Find the right value for scntl3. */ ncr_getclock (np); /* ** Reset chip. */ OUTB (nc_istat, SRST); OUTB (nc_istat, 0 ); /* ** Now check the cache handling of the pci chipset. */ if (ncr_snooptest (np)) { printf ("CACHE INCORRECTLY CONFIGURED.\n"); #ifndef __NetBSD__ return (0); #endif }; /* ** After SCSI devices have been opened, we cannot ** reset the bus safely, so we do it here. ** Interrupt handler does the real work. */ OUTB (nc_scntl1, CRST); /* ** process the reset exception, ** if interrupts are not enabled yet. */ ncr_exception (np); #ifdef ANCIENT printf ("%s: waiting for scsi devices to settle\n", ncr_name (np)); DELAY (1000000); #endif printf ("%s scanning for targets 0..%d ($Revision: 1.2 $)\n", ncr_name (np), MAX_TARGET-1); /* ** Now let the generic SCSI driver ** look for the SCSI devices on the bus .. */ #ifndef ANCIENT #ifdef __NetBSD__ np->sc_link.adapter_softc = np; #else /* !__NetBSD__ */ np->sc_link.adapter_unit = ncr_units; #endif /* !__NetBSD__ */ np->sc_link.adapter_targ = np->myaddr; np->sc_link.adapter = &ncr_switch; np->sc_link.device = &ncr_dev; #ifdef __NetBSD__ config_found(self, &np->sc_link, ncr_print); #else /* !__NetBSD__ */ scsi_attachdevs (&np->sc_link); #endif /* !__NetBSD__ */ #else /* ANCIENT */ scsi_attachdevs (ncr_units, np->myaddr, &ncr_switch); #endif /* ANCIENT */ /* ** start the timeout daemon */ ncr_timeout (np); np->lasttime=0; /* ** Done. */ #ifndef __NetBSD__ ncr_units++; return(1); #endif } /*========================================================== ** ** ** Process pending device interrupts. ** ** **========================================================== */ #ifdef __NetBSD__ int ncr_intr(np) ncb_p np; { int n = 0; #else /* !__NetBSD__ */ static int ncr_intr (int dev) { ncb_p np; int n=0; /* ** Sanity check */ assert (dev= ncr_units) return (0); np = ncrp[dev]; #endif /* !__NetBSD__ */ #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_TINY) printf ("["); #endif /* SCSI_NCR_DEBUG */ /* ** Repeat until no outstanding ints */ while (INB(nc_istat) & (INTF|SIP|DIP)) { ncr_exception (np); n=1; }; /* ** Slowdown timeout function. */ if (n) np->ticks = 100; #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_TINY) printf ("]\n"); #endif /* SCSI_NCR_DEBUG */ return (n); } /*========================================================== ** ** ** Start execution of a SCSI command. ** This is called from the generic SCSI driver. ** ** **========================================================== */ static INT32 ncr_start (struct scsi_xfer * xp) { #ifndef ANCIENT #ifdef __NetBSD__ ncb_p np = xp->sc_link->adapter_softc; #else /*__NetBSD__*/ ncb_p np = ncrp[xp->sc_link->adapter_unit]; #endif/*__NetBSD__*/ #else /* ANCIENT */ ncb_p np = ncrp[xp->adapter]; #endif /* ANCIENT */ struct scsi_generic * cmd = xp->cmd; ccb_p cp; lcb_p lp; tcb_p tp = &np->target[xp->TARGET]; int i, oldspl, segments, flags = xp->flags; u_char ptr, nego, idmsg; u_long msglen, msglen2; /*--------------------------------------------- ** ** Reset SCSI bus ** ** Interrupt handler does the real work. ** **--------------------------------------------- */ if (flags & SCSI_RESET) { OUTB (nc_scntl1, CRST); return(COMPLETE); }; /*--------------------------------------------- ** ** Some shortcuts ... ** **--------------------------------------------- */ if ((xp->TARGET == np->myaddr ) || (xp->TARGET >= MAX_TARGET) || (xp->LUN >= MAX_LUN ) || (flags & SCSI_DATA_UIO)) { xp->error = XS_DRIVER_STUFFUP; return(HAD_ERROR); }; /*--------------------------------------------- ** ** Diskaccess to partial blocks? ** **--------------------------------------------- */ if ((xp->datalen & 0x1ff) && !(tp->inqdata[0] & 0x1f)) { switch (cmd->opcode) { case 0x28: /* READ_BIG (10) */ case 0xa8: /* READ_HUGE (12) */ case 0x2a: /* WRITE_BIG (10) */ case 0xaa: /* WRITE_HUGE(12) */ PRINT_ADDR(xp); printf ("access to partial disk block refused.\n"); xp->error = XS_DRIVER_STUFFUP; return(HAD_ERROR); }; }; #ifdef ANCIENT /*--------------------------------------------- ** Ancient version of ** doesn't set the DATA_IN/DATA_OUT bits. ** So we have to fix it .. **--------------------------------------------- */ switch (cmd->opcode) { case 0x1a: /* MODE_SENSE */ case 0x25: /* READ_CAPACITY */ case 0x28: /* READ_BIG (10) */ xp->flags |= SCSI_DATA_IN; break; case 0x2a: /* WRITE_BIG(10) */ xp->flags |= SCSI_DATA_OUT; break; }; #endif /* ANCIENT */ #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_TINY) { PRINT_ADDR(xp); printf ("CMD=%x F=%x L=%x ", cmd->opcode, xp->flags, xp->datalen); } #endif /* SCSI_NCR_DEBUG */ /*-------------------------------------------- ** ** Sanity checks ... ** copied from Elischer's Adaptec driver. ** **-------------------------------------------- */ flags = xp->flags; if (!(flags & INUSE)) { printf("%s: ?INUSE?\n", ncr_name (np)); xp->flags |= INUSE; }; if(flags & ITSDONE) { printf("%s: ?ITSDONE?\n", ncr_name (np)); xp->flags &= ~ITSDONE; }; if (xp->bp) flags |= (SCSI_NOSLEEP); /* just to be sure */ /*--------------------------------------------------- ** ** Assign a ccb / bind xp ** **---------------------------------------------------- */ if (!(cp=ncr_get_ccb (np, flags, xp->TARGET, xp->LUN))) { printf ("%s: no ccb.\n", ncr_name (np)); xp->error = XS_DRIVER_STUFFUP; return(TRY_AGAIN_LATER); }; cp->xfer = xp; /*--------------------------------------------------- ** ** timestamp ** **---------------------------------------------------- */ bzero (&cp->phys.header.stamp, sizeof (struct tstamp)); cp->phys.header.stamp.start = time; /*---------------------------------------------------- ** ** Get device quirks from a speciality table. ** ** @GENSCSI@ ** This should be a part of the device table ** in "scsi_conf.c". ** **---------------------------------------------------- */ if (tp->quirks & QUIRK_UPDATE) { #ifdef NEW_SCSICONF tp->quirks = xp->sc_link->quirks; #else tp->quirks = ncr_lookup ((char*) &tp->inqdata[0]); #endif if (tp->quirks) { PRINT_ADDR(xp); printf ("quirks=%x.\n", tp->quirks); }; }; /*--------------------------------------------------- ** ** negotiation required? ** **---------------------------------------------------- */ nego = 0; if (tp->inqdata[7]) { /* ** negotiate synchronous transfers? */ if (!tp->period) { if (tp->inqdata[7] & INQ7_SYNC) { nego = NS_SYNC; } else { tp->period =0xffff; tp->sval = 0xe0; PRINT_ADDR(xp); printf ("asynchronous.\n"); }; }; /* ** negotiate wide transfers ? */ if (!tp->widedone) { if (tp->inqdata[7] & INQ7_WIDE16) { if (!nego) nego = NS_WIDE; } else tp->widedone=1; }; }; /*--------------------------------------------------- ** ** choose a new tag ... ** **---------------------------------------------------- */ if ((lp = tp->lp[xp->LUN]) && (lp->usetags)) { /* ** assign a tag to this ccb! */ while (!cp->tag) { ccb_p cp2 = lp->next_ccb; lp->lasttag = lp->lasttag % 255 + 1; while (cp2 && cp2->tag != lp->lasttag) cp2 = cp2->next_ccb; if (cp2) continue; cp->tag=lp->lasttag; PRINT_ADDR(xp); printf ("using tag #%d.\n", cp->tag); }; } else { cp->tag=0; #if !defined(ANCIENT) && !defined(__NetBSD__) /* ** @GENSCSI@ Bug in "/sys/scsi/cd.c" ** ** /sys/scsi/cd.c initializes opennings with 2. ** Our info value of 1 is not respected. */ if (xp->sc_link && xp->sc_link->opennings) { PRINT_ADDR(xp); printf ("opennings set to 0.\n"); xp->sc_link->opennings = 0; }; #endif }; /*---------------------------------------------------- ** ** Build the identify / tag / sdtr message ** **---------------------------------------------------- */ idmsg = (cp==&np->ccb ? 0x80 : 0xc0) | xp->LUN; cp -> scsi_smsg [0] = idmsg; msglen=1; if (cp->tag) { /* ** Ordered write ops, unordered read ops. */ switch (cmd->opcode) { case 0x08: /* READ_SMALL (6) */ case 0x28: /* READ_BIG (10) */ case 0xa8: /* READ_HUGE (12) */ cp -> scsi_smsg [msglen] = M_SIMPLE_TAG; break; default: cp -> scsi_smsg [msglen] = M_ORDERED_TAG; } /* ** can be overwritten by ncrstat */ switch (np->order) { case M_SIMPLE_TAG: case M_ORDERED_TAG: cp -> scsi_smsg [msglen] = np->order; }; msglen++; cp -> scsi_smsg [msglen++] = cp -> tag; } switch (nego) { case NS_SYNC: cp -> scsi_smsg [msglen++] = M_EXTENDED; cp -> scsi_smsg [msglen++] = 3; cp -> scsi_smsg [msglen++] = M_X_SYNC_REQ; cp -> scsi_smsg [msglen++] = tp->minsync; cp -> scsi_smsg [msglen++] = tp->maxoffs; #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_NEGO) { PRINT_ADDR(cp->xfer); printf ("sync msgout: "); ncr_show_msg (&cp->scsi_smsg [msglen-5]); printf (".\n"); }; #endif /* SCSI_NCR_DEBUG */ break; case NS_WIDE: cp -> scsi_smsg [msglen++] = M_EXTENDED; cp -> scsi_smsg [msglen++] = 2; cp -> scsi_smsg [msglen++] = M_X_WIDE_REQ; cp -> scsi_smsg [msglen++] = tp->usrwide; #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_NEGO) { PRINT_ADDR(cp->xfer); printf ("wide msgout: "); ncr_show_msg (&cp->scsi_smsg [msglen-4]); printf (".\n"); }; #endif /* SCSI_NCR_DEBUG */ break; }; /*---------------------------------------------------- ** ** Build the identify message for getcc. ** **---------------------------------------------------- */ cp -> scsi_smsg2 [0] = idmsg; msglen2 = 1; /*---------------------------------------------------- ** ** Build the data descriptors ** **---------------------------------------------------- */ segments = ncr_scatter (&cp->phys, (vm_offset_t) xp->data, (vm_size_t) xp->datalen); if (segments < 0) { xp->error = XS_DRIVER_STUFFUP; ncr_free_ccb(np, cp, flags); return(HAD_ERROR); }; /*---------------------------------------------------- ** ** Set the SAVED_POINTER. ** **---------------------------------------------------- */ if (flags & SCSI_DATA_IN) { cp->phys.header.savep = vtophys (&np->script->data_in); cp->phys.header.goalp = cp->phys.header.savep +20 +segments*16; } else if (flags & SCSI_DATA_OUT) { cp->phys.header.savep = vtophys (&np->script->data_out); cp->phys.header.goalp = cp->phys.header.savep +20 +segments*16; } else { cp->phys.header.savep = vtophys (&np->script->no_data); cp->phys.header.goalp = cp->phys.header.savep; }; cp->phys.header.lastp = cp->phys.header.savep; /*---------------------------------------------------- ** ** fill ccb ** **---------------------------------------------------- ** ** ** physical -> virtual backlink ** Generic SCSI command */ cp->phys.header.cp = cp; /* ** Startqueue */ cp->phys.header.launch.l_paddr = vtophys (&np->script->select); cp->phys.header.launch.l_cmd = SCR_JUMP; /* ** select */ cp->phys.select.sel_id = xp->TARGET; cp->phys.select.sel_scntl3 = tp->wval; cp->phys.select.sel_sxfer = tp->sval; /* ** message */ cp->phys.smsg.addr = vtophys (&cp->scsi_smsg ); cp->phys.smsg.size = msglen; cp->phys.smsg2.addr = vtophys (&cp->scsi_smsg2); cp->phys.smsg2.size = msglen2; /* ** command */ #ifdef ANCIENT bcopy (cmd, &cp->cmd, sizeof (cp->cmd)); cp->phys.cmd.addr = vtophys (&cp->cmd); #else /* ANCIENT */ cp->phys.cmd.addr = vtophys (cmd); #endif /* ANCIENT */ cp->phys.cmd.size = xp->cmdlen; /* ** sense data */ cp->phys.sense.addr = vtophys (&cp->xfer->sense); cp->phys.sense.size = sizeof(struct scsi_sense_data); /* ** status */ cp->actualquirks = tp->quirks; cp->host_status = nego ? HS_NEGOTIATE : HS_BUSY; cp->scsi_status = S_ILLEGAL; cp->parity_status = 0; cp->xerr_status = XE_OK; cp->sync_status = tp->sval; cp->nego_status = nego; cp->wide_status = tp->wval; /*---------------------------------------------------- ** ** Critical region: starting this job. ** **---------------------------------------------------- */ oldspl = 0; /* for the sake of gcc */ if (!(flags & SCSI_NOMASK)) oldspl = splbio(); np->lock++; /* ** reselect pattern and activate this job. */ cp->jump_ccb.l_cmd = (SCR_JUMP ^ IFFALSE (DATA (cp->tag))); cp->tlimit = time.tv_sec + xp->timeout / 1000 + 2; cp->magic = CCB_MAGIC; /* ** insert into startqueue. */ ptr = np->squeueput + 1; if (ptr >= MAX_START) ptr=0; np->squeue [ptr ] = vtophys(&np->script->idle); np->squeue [np->squeueput] = vtophys(&cp->phys); np->squeueput = ptr; #ifdef SCSI_NCR_DEBUG if(ncr_debug & DEBUG_QUEUE) printf ("%s: queuepos=%d tryoffset=%d.\n", ncr_name (np), np->squeueput, np->script->startpos[0]-(vtophys(&np->script->tryloop))); #endif /* SCSI_NCR_DEBUG */ /* ** Script processor may be waiting for reconnect. ** Wake it up. */ OUTB (nc_istat, SIGP); /* ** If interrupts are enabled, return now. ** Command is successfully queued. */ np->lock--; if (!(flags & SCSI_NOMASK)) { splx (oldspl); if (np->lasttime) { #ifdef SCSI_NCR_DEBUG if(ncr_debug & DEBUG_TINY) printf ("Q"); #endif /* SCSI_NCR_DEBUG */ return(SUCCESSFULLY_QUEUED); }; }; /*---------------------------------------------------- ** ** Interrupts not yet enabled - have to poll. ** **---------------------------------------------------- */ #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_POLL) printf("P"); #endif /* SCSI_NCR_DEBUG */ for (i=xp->timeout; i && !(xp->flags & ITSDONE);i--) { #ifdef SCSI_NCR_DEBUG if ((ncr_debug & DEBUG_POLL) && (cp->host_status)) printf ("%c", (cp->host_status & 0xf) + '0'); #endif /* SCSI_NCR_DEBUG */ DELAY (1000); ncr_exception (np); }; /* ** Abort if command not done. */ if (!(xp->flags & ITSDONE)) { printf ("%s: aborting job ...\n", ncr_name (np)); OUTB (nc_istat, CABRT); DELAY (100000); OUTB (nc_istat, SIGP); ncr_exception (np); }; if (!(xp->flags & ITSDONE)) { printf ("%s: abortion failed at %x.\n", ncr_name (np), INL(nc_dsp)); ncr_init (np, "timeout", HS_TIMEOUT); }; if (!(xp->flags & ITSDONE)) { cp-> host_status = HS_SEL_TIMEOUT; ncr_complete (np, cp); }; #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_RESULT) { printf ("%s: result: %x %x.\n", ncr_name (np), cp->host_status, cp->scsi_status); }; #endif /* SCSI_NCR_DEBUG */ if (!(flags & SCSI_NOMASK)) return (SUCCESSFULLY_QUEUED); switch (xp->error) { case 0 : return (COMPLETE); case XS_BUSY: return (TRY_AGAIN_LATER); }; return (HAD_ERROR); } /*========================================================== ** ** ** Complete execution of a SCSI command. ** Signal completion to the generic SCSI driver. ** ** **========================================================== */ void ncr_complete (ncb_p np, ccb_p cp) { struct scsi_xfer * xp; tcb_p tp; lcb_p lp; /* ** Sanity check */ if (!cp || !cp->magic || !cp->xfer) return; cp->magic = 1; cp->tlimit= 0; /* ** No Reselect anymore. */ cp->jump_ccb.l_cmd = (SCR_JUMP); /* ** No starting. */ cp->phys.header.launch.l_paddr= vtophys (&np->script->idle); /* ** timestamp */ ncb_profile (np, cp); #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_TINY) printf ("CCB=%x STAT=%x/%x\n", (u_long)cp & 0xfff, cp->host_status,cp->scsi_status); #endif /* SCSI_NCR_DEBUG */ xp = cp->xfer; cp->xfer = NULL; tp = &np->target[xp->TARGET]; lp = tp->lp[xp->LUN]; /* ** Check for parity errors. */ if (cp->parity_status) { PRINT_ADDR(xp); printf ("%d parity error(s), fallback.\n", cp->parity_status); /* ** fallback to asynch transfer. */ tp->usrsync=255; tp->period = 0; }; /* ** Check for extended errors. */ if (cp->xerr_status != XE_OK) { PRINT_ADDR(xp); switch (cp->xerr_status) { case XE_EXTRA_DATA: printf ("extraneous data discarded.\n"); break; case XE_BAD_PHASE: printf ("illegal scsi phase (4/5).\n"); break; default: printf ("extended error %d.\n", cp->xerr_status); break; }; if (cp->host_status==HS_COMPLETE) cp->host_status = HS_FAIL; }; /* ** Check the status. */ if ( (cp->host_status == HS_COMPLETE) && (cp->scsi_status == S_GOOD)) { /* ** All went well. */ xp->resid = 0; /* ** if (cp->phys.header.lastp != cp->phys.header.goalp)... ** ** @RESID@ ** Could dig out the correct value for resid, ** but it would be quite complicated. ** ** The ah1542.c driver sets it to 0 too ... */ /* ** Try to assign a ccb to this nexus */ ncr_alloc_ccb (np, xp); /* ** On inquire cmd (0x12) save some data. */ #ifdef ANCIENT if (cp->cmd.opcode == 0x12) { #else /* ANCIENT */ if (xp->cmd->opcode == 0x12) { #endif /* ANCIENT */ bcopy ( xp->data, &tp->inqdata, sizeof (tp->inqdata)); /* ** set number of tags */ ncr_setmaxtags (tp, tp->usrtags); /* ** prepare negotiation of synch and wide. */ ncr_negotiate (np, tp); /* ** force quirks update before next command start */ tp->quirks |= QUIRK_UPDATE; }; /* ** Announce changes to the generic driver */ if (lp) { ncr_settags (tp, lp); if (lp->reqlink != lp->actlink) ncr_opennings (np, lp, xp); }; #ifdef DK dk_xfer[DK] ++; dk_wds [DK] += xp->datalen/64; dk_wpms[DK] = 1000000; #endif /* DK */ tp->bytes += xp->datalen; tp->transfers ++; } else if (xp->flags & SCSI_ERR_OK) { /* ** Not correct, but errors expected. */ xp->resid = 0; } else if ((cp->host_status == HS_COMPLETE) && (cp->scsi_status == (S_SENSE|S_GOOD))) { /* ** Check condition code */ xp->error = XS_SENSE; #ifdef SCSI_NCR_DEBUG if (ncr_debug & (DEBUG_RESULT|DEBUG_TINY)) { u_char * p = (u_char*) & xp->sense; int i; printf ("\n%s: sense data:", ncr_name (np)); for (i=0; i<14; i++) printf (" %x", *p++); printf (".\n"); }; #endif /* SCSI_NCR_DEBUG */ } else if ((cp->host_status == HS_COMPLETE) && (cp->scsi_status == S_BUSY)) { /* ** Target is busy. */ xp->error = XS_BUSY; } else if ((cp->host_status == HS_SEL_TIMEOUT) || (cp->host_status == HS_TIMEOUT)) { /* ** No response */ xp->error = XS_TIMEOUT; } else { /* ** Other protocol messes */ PRINT_ADDR(xp); printf ("COMMAND FAILED (%x %x) @%x.\n", cp->host_status, cp->scsi_status, cp); xp->error = XS_DRIVER_STUFFUP; } xp->flags |= ITSDONE; /* ** trace output */ if (tp->usrflag & UF_TRACE) { u_char * p; int i; PRINT_ADDR(xp); printf (" CMD:"); #ifdef ANCIENT p = (u_char*) &cp->cmd.opcode; #else /* ANCIENT */ p = (u_char*) &xp->cmd->opcode; #endif /* ANCIENT */ for (i=0; icmdlen; i++) printf (" %x", *p++); if (cp->host_status==HS_COMPLETE) { switch (cp->scsi_status) { case S_GOOD: printf (" GOOD"); break; case S_CHECK_COND: printf (" SENSE:"); p = (u_char*) &xp->sense; #ifdef ANCIENT for (i=0; isense); i++) #else /* ANCIENT */ for (i=0; ireq_sense_length; i++) #endif /* ANCIENT */ printf (" %x", *p++); break; default: printf (" STAT: %x\n", cp->scsi_status); break; }; } else printf (" HOSTERROR: %x", cp->host_status); printf ("\n"); }; /* ** Free this ccb */ ncr_free_ccb (np, cp, xp->flags); /* ** signal completion to generic driver. */ #ifdef ANCIENT if (xp->when_done) (*(xp->when_done))(xp->done_arg,xp->done_arg2); #else /* ANCIENT */ scsi_done (xp); #endif /* ANCIENT */ } /*========================================================== ** ** ** Signal all (or one) control block done. ** ** **========================================================== */ void ncr_wakeup (ncb_p np, u_long code) { /* ** Starting at the default ccb and following ** the links, complete all jobs with a ** host_status greater than "disconnect". ** ** If the "code" parameter is not zero, ** complete all jobs that are not IDLE. */ ccb_p cp = &np->ccb; while (cp) { switch (cp->host_status) { case HS_IDLE: break; case HS_DISCONNECT: #ifdef SCSI_NCR_DEBUG if(ncr_debug & DEBUG_TINY) printf ("D"); #endif /* SCSI_NCR_DEBUG */ /* fall through */ case HS_BUSY: case HS_NEGOTIATE: if (!code) break; cp->host_status = code; /* fall through */ default: ncr_complete (np, cp); break; }; cp = cp -> link_ccb; }; } /*========================================================== ** ** ** Start NCR chip. ** ** **========================================================== */ void ncr_init (ncb_p np, char * msg, u_long code) { int i; u_long usrsync; u_char usrwide; /* ** Reset chip. */ OUTB (nc_istat, SRST ); /* ** Message. */ if (msg) printf ("%s: restart (%s).\n", ncr_name (np), msg); /* ** Clear Start Queue */ for (i=0;i squeue [i] = vtophys (&np->script->idle); /* ** Start at first entry. */ np->squeueput = 0; np->script->startpos[0] = vtophys (&np->script->tryloop); np->script->start0 [0] = SCR_INT ^ IFFALSE (0); /* ** Wakeup all pending jobs. */ ncr_wakeup (np, code); /* ** Init chip. */ OUTB (nc_istat, 0 ); /* Remove Reset, abort ... */ OUTB (nc_scntl0, 0xca ); /* full arb., ena parity, par->ATN */ OUTB (nc_scntl1, 0x00 ); /* odd parity, and remove CRST!! */ OUTB (nc_scntl3, np->rv_scntl3);/* timing prescaler */ OUTB (nc_scid , 0x40|np->myaddr);/* host adapter SCSI address */ OUTW (nc_respid, 1ul<myaddr);/* id to respond to */ OUTB (nc_istat , SIGP ); /* Signal Process */ OUTB (nc_dmode , 0xc ); /* Burst length = 16 transfer */ OUTB (nc_dcntl , NOCOM ); /* no single step mode, protect SFBR*/ OUTB (nc_ctest4, 0x08 ); /* enable master parity checking */ OUTB (nc_stest2, EXT ); /* Extended Sreq/Sack filtering */ OUTB (nc_stest3, TE ); /* TolerANT enable */ OUTB (nc_stime0, 0xfb ); /* HTH = 1.6sec STO = 0.1 sec. */ /* ** Reinitialize usrsync. ** Have to renegotiate synch mode. */ usrsync = 255; if (SCSI_NCR_MAX_SYNC) { u_long period; period =1000000/SCSI_NCR_MAX_SYNC; /* ns = 10e6 / kHz */ if (period <= 11 * np->ns_sync) { if (period < 4 * np->ns_sync) usrsync = np->ns_sync; else usrsync = period / 4; }; }; /* ** Reinitialize usrwide. ** Have to renegotiate wide mode. */ usrwide = (SCSI_NCR_MAX_WIDE); if (usrwide > np->maxwide) usrwide=np->maxwide; /* ** Fill in target structure. */ for (i=0;itarget[i]; tp->sval = 0; tp->wval = np->rv_scntl3; tp->usrsync = usrsync; tp->usrwide = usrwide; ncr_negotiate (np, tp); } /* ** enable ints */ OUTW (nc_sien , STO|HTH|MA|SGE|UDC|RST); OUTB (nc_dien , MDPE|BF|ABRT|SSI|SIR|IID); /* ** Start script processor. */ OUTL (nc_dsp, vtophys (&np->script->start)); } /*========================================================== ** ** Prepare the negotiation values for wide and ** synchronous transfers. ** **========================================================== */ static void ncr_negotiate (struct ncb* np, struct tcb* tp) { /* ** minsync unit is 4ns ! */ u_long minsync = tp->usrsync; if (minsync < 25) minsync=25; /* ** if not scsi 2 ** don't believe FAST! */ if ((minsync < 50) && (tp->inqdata[2] & 0x0f) < 2) minsync=50; /* ** our limit .. */ if (minsync < np->ns_sync) minsync = np->ns_sync; /* ** divider limit */ if (minsync > (np->ns_sync * 11) / 4) minsync = 255; tp->minsync = minsync; tp->maxoffs = (minsync<255 ? 8 : 0); /* ** period=0: has to negotiate sync transfer */ tp->period=0; /* ** widedone=0: has to negotiate wide transfer */ tp->widedone=0; } /*========================================================== ** ** Switch sync mode for current job and it's target ** **========================================================== */ static void ncr_setsync (ncb_p np, ccb_p cp, u_char sxfer) { struct scsi_xfer *xp; tcb_p tp; u_char target = INB (nc_ctest0)&7; assert (cp); if (!cp) return; xp = cp->xfer; assert (xp); if (!xp) return; assert (target == xp->TARGET & 7); tp = &np->target[target]; tp->period= sxfer&0xf ? ((sxfer>>5)+4) * np->ns_sync : 0xffff; if (tp->sval == sxfer) return; tp->sval = sxfer; /* ** Bells and whistles ;-) */ PRINT_ADDR(xp); if (sxfer & 0x0f) { /* ** Disable extended Sreq/Sack filtering */ if (tp->period <= 200) OUTB (nc_stest2, 0); printf ("%s%dns (%d Mb/sec) offset %d.\n", tp->period<200 ? "FAST SCSI-2 ":"", tp->period, (1000+tp->period/2)/tp->period, sxfer & 0x0f); } else printf ("asynchronous.\n"); /* ** set actual value and sync_status */ OUTB (nc_sxfer, sxfer); np->sync_st = sxfer; /* ** patch ALL ccbs of this target. */ for (cp = &np->ccb; cp; cp = cp->link_ccb) { if (!cp->xfer) continue; if (cp->xfer->TARGET != target) continue; cp->sync_status = sxfer; }; } /*========================================================== ** ** Switch wide mode for current job and it's target ** **========================================================== */ static void ncr_setwide (ncb_p np, ccb_p cp, u_char wide) { struct scsi_xfer *xp; u_short target = INB (nc_ctest0)&7; tcb_p tp; u_char scntl3 = np->rv_scntl3 | (wide ? EWS : 0); assert (cp); if (!cp) return; xp = cp->xfer; assert (xp); if (!xp) return; assert (target == xp->TARGET & 7); tp = &np->target[target]; tp->widedone = wide+1; if (tp->wval == scntl3) return; tp->wval = scntl3; /* ** Bells and whistles ;-) */ PRINT_ADDR(xp); if (scntl3 & EWS) printf ("WIDE SCSI (16 bit) enabled.\n"); else printf ("WIDE SCSI disabled.\n"); /* ** set actual value and sync_status */ OUTB (nc_scntl3, scntl3); np->wide_st = scntl3; /* ** patch ALL ccbs of this target. */ for (cp = &np->ccb; cp; cp = cp->link_ccb) { if (!cp->xfer) continue; if (cp->xfer->TARGET != target) continue; cp->wide_status = scntl3; }; } /*========================================================== ** ** Switch tagged mode for a target. ** **========================================================== */ static void ncr_setmaxtags (tcb_p tp, u_long usrtags) { int l; tp->usrtags = usrtags; for (l=0; llp[l]; if (!lp) continue; ncr_settags (tp, lp); }; } static void ncr_settags (tcb_p tp, lcb_p lp) { u_char reqtags, tmp; if ((!tp) || (!lp)) return; /* ** only devices capable of tagges commands ** only disk devices ** only if enabled by user .. */ if (( tp->inqdata[7] & INQ7_QUEUE) && ((tp->inqdata[0] & 0x1f)==0x00) && tp->usrtags) { reqtags = tp->usrtags; if (lp->actlink <= 1) lp->usetags=reqtags; } else { reqtags = 1; if (lp->actlink <= 1) lp->usetags=0; }; /* ** don't announce more than available. */ tmp = lp->actccbs; if (tmp > reqtags) tmp = reqtags; lp->reqlink = tmp; /* ** don't discard if announced. */ tmp = lp->actlink; if (tmp < reqtags) tmp = reqtags; lp->reqccbs = tmp; } /*---------------------------------------------------- ** ** handle user commands ** **---------------------------------------------------- */ static void ncr_usercmd (ncb_p np) { u_char t; tcb_p tp; switch (np->user.cmd) { case 0: return; case UC_SETSYNC: for (t=0; tuser.target>>t)&1)) continue; tp = &np->target[t]; tp->usrsync = np->user.data; ncr_negotiate (np, tp); }; break; case UC_SETTAGS: if (np->user.data > SCSI_NCR_MAX_TAGS) break; for (t=0; tuser.target>>t)&1)) continue; ncr_setmaxtags (&np->target[t], np->user.data); }; break; case UC_SETDEBUG: ncr_debug = np->user.data; break; case UC_SETORDER: np->order = np->user.data; break; case UC_SETWIDE: for (t=0; tuser.target>>t)&1)) continue; tp = &np->target[t]; size = np->user.data; if (size > np->maxwide) size=np->maxwide; tp->usrwide = size; ncr_negotiate (np, tp); }; break; case UC_SETFLAG: for (t=0; tuser.target>>t)&1)) continue; tp = &np->target[t]; tp->usrflag = np->user.data; }; break; } np->user.cmd=0; } /*========================================================== ** ** ** ncr timeout handler. ** ** **========================================================== ** ** Misused to keep the driver running when ** interrupts are not configured correctly. ** **---------------------------------------------------------- */ static void ncr_timeout (ncb_p np) { u_long thistime = time.tv_sec; u_long step = np->ticks; u_long count = 0; long signed t; ccb_p cp; if (np->lasttime != thistime) { np->lasttime = thistime; ncr_usercmd (np); /*---------------------------------------------------- ** ** handle ncr chip timeouts ** ** Assumption: ** We have a chance to arbitrate for the ** SCSI bus at least every 10 seconds. ** **---------------------------------------------------- */ t = thistime - np->heartbeat; if (t<2) np->latetime=0; else np->latetime++; if (np->latetime>2) { /* ** If there are no requests, the script ** processor will sleep on SEL_WAIT_RESEL. ** But we have to check whether it died. ** Let's wake it up. */ OUTB (nc_istat, SIGP); }; if (np->latetime>10) { /* ** Although we tried to wakeup it, ** the script processor didn't answer. ** ** May be a target is hanging, ** or another initator lets a tape device ** rewind with disconnect disabled :-( ** ** We won't accept that. */ printf ("%s: reset by timeout.\n", ncr_name (np)); OUTB (nc_istat, SRST); OUTB (nc_istat, 0); if (INB (nc_sbcl) & CBSY) OUTB (nc_scntl1, CRST); ncr_init (np, NULL, HS_TIMEOUT); np->heartbeat = thistime; }; /*---------------------------------------------------- ** ** handle ccb timeouts ** **---------------------------------------------------- */ for (cp=&np->ccb; cp; cp=cp->link_ccb) { /* ** look for timed out ccbs. */ if (!cp->host_status) continue; count++; if (cp->tlimit > thistime) continue; /* ** Disable reselect. ** Remove it from startqueue. */ cp->jump_ccb.l_cmd = (SCR_JUMP); if (cp->phys.header.launch.l_paddr == vtophys (&np->script->select)) { printf ("%s: timeout ccb=%x (skip)\n", ncr_name (np), cp); cp->phys.header.launch.l_paddr = vtophys (&np->script->skip); }; switch (cp->host_status) { case HS_BUSY: case HS_NEGOTIATE: /* ** still in start queue ? */ if (cp->phys.header.launch.l_paddr == vtophys (&np->script->skip)) continue; /* fall through */ case HS_DISCONNECT: cp->host_status=HS_TIMEOUT; }; cp->tag = 0; /* ** wakeup this ccb. */ { int oldspl = splbio(); ncr_complete (np, cp); splx (oldspl); }; }; } timeout (TIMEOUT ncr_timeout, (caddr_t) np, step ? step : 1); if ((INB(nc_istat) & (INTF|SIP|DIP)) && !np->lock) { /* ** Process pending interrupts. */ int oldspl = splbio (); #ifndef __NetBSD__ u_long imask = getirr(); #endif #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_TINY) printf ("{"); #endif /* SCSI_NCR_DEBUG */ ncr_exception (np); #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_TINY) printf ("}"); #endif /* SCSI_NCR_DEBUG */ #ifndef __NetBSD__ imask &=~getirr(); imask &=~(0x87); /* remove 7,2,1,0 */ splx (oldspl); /* ** automagically find int vector. */ if (imask) { if ((imask != np->imask) && (np->mcount < 100)) np->mcount = 0; np->imask = imask; np->mcount++; }; /* ** a hint to the user :-) */ if (np->mcount == 100) { if (np->imask & (np->imask-1)) { printf ("%s: please configure intr mask %x.\n", ncr_name (np), np->imask); } else { printf ("%s: please configure intr %d.\n", ncr_name (np), ffs (np->imask)-1); }; np->mcount++; }; #endif }; } /*========================================================== ** ** ** ncr chip exception handler. ** ** **========================================================== */ void ncr_exception (ncb_p np) { u_char istat, dstat; u_short sist; u_long dsp; /* ** interrupt on the fly ? */ while ((istat = INB (nc_istat)) & INTF) { #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_TINY) printf ("F"); #endif /* SCSI_NCR_DEBUG */ OUTB (nc_istat, INTF); np->profile.num_fly++; ncr_wakeup (np, 0); }; if (!(istat & (SIP|DIP))) return; /* ** Steinbach's Guideline for Systems Programming: ** Never test for an error condition you don't know how to handle. */ dstat = INB (nc_dstat); sist = INW (nc_sist) ; np->profile.num_int++; #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_TINY) printf ("<%d|%x:%x|%x:%x>", INB(nc_scr0), dstat,sist, INL(nc_dsp),INL(nc_dbc)); #endif /* SCSI_NCR_DEBUG */ if ((dstat==DFE) && (sist==PAR)) return; /*========================================================== ** ** First the normal cases. ** **========================================================== */ /*------------------------------------------- ** SCSI reset **------------------------------------------- */ if (sist & RST) { ncr_init (np, "scsi reset", HS_RESET); return; }; /*------------------------------------------- ** selection timeout ** ** IID excluded from dstat mask! ** (chip bug) **------------------------------------------- */ if ((sist & STO) && !(sist & (GEN|HTH|MA|SGE|UDC|RST|PAR)) && !(dstat & (MDPE|BF|ABRT|SIR))) { ncr_int_sto (np); return; }; /*------------------------------------------- ** Phase mismatch. **------------------------------------------- */ if ((sist & MA) && !(sist & (STO|GEN|HTH|SGE|UDC|RST|PAR)) && !(dstat & (MDPE|BF|ABRT|SIR|IID))) { ncr_int_ma (np); return; }; /*---------------------------------------- ** move command with length 0 **---------------------------------------- */ if ((dstat & IID) && !(sist & (STO|GEN|HTH|MA|SGE|UDC|RST|PAR)) && !(dstat & (MDPE|BF|ABRT|SIR)) && ((INL(nc_dbc) & 0xf8000000) == SCR_MOVE_TBL)) { /* ** Target wants more data than available. ** The "no_data" script will do it. */ OUTL (nc_dsp, vtophys(&np->script->no_data)); return; }; /*------------------------------------------- ** Programmed interrupt **------------------------------------------- */ if ((dstat & SIR) && !(sist & (STO|GEN|HTH|MA|SGE|UDC|RST|PAR)) && !(dstat & (MDPE|BF|ABRT|IID)) && (INB(nc_dsps) <= SIR_MAX)) { ncr_int_sir (np); return; }; /*======================================== ** do the register dump **======================================== */ if (time.tv_sec - np->regtime.tv_sec>10) { int i; np->regtime = time; for (i=0; iregdump); i++) ((char*)&np->regdump)[i] = ((char*)np->reg)[i]; np->regdump.nc_dstat = dstat; np->regdump.nc_sist = sist; }; printf ("%s targ %d?: ERROR (%x:%x:%x) (%x/%x) @ (%x:%x).\n", ncr_name (np), INB (nc_ctest0)&7, dstat, sist, INB (nc_sbcl), INB (nc_sxfer),INB (nc_scntl3), dsp = INL (nc_dsp), INL (nc_dbc)); /*---------------------------------------- ** clean up the dma fifo **---------------------------------------- */ if ( (INB(nc_sstat0) & (ILF|ORF|OLF) ) || (INB(nc_sstat1) & (FF3210) ) || (INB(nc_sstat2) & (ILF1|ORF1|OLF1)) || /* wide .. */ !(dstat & DFE)) { printf ("%s: have to clear fifos.\n", ncr_name (np)); OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */ OUTB (nc_ctest3, CLF); /* clear dma fifo */ } /*---------------------------------------- ** unexpected disconnect **---------------------------------------- */ if ((sist & UDC) && !(sist & (STO|GEN|HTH|MA|SGE|RST|PAR)) && !(dstat & (MDPE|BF|ABRT|SIR|IID))) { OUTB (nc_scr0, HS_UNEXPECTED); OUTL (nc_dsp, vtophys(&np->script->cleanup)); return; }; /*---------------------------------------- ** cannot disconnect **---------------------------------------- */ if ((dstat & IID) && !(sist & (STO|GEN|HTH|MA|SGE|UDC|RST|PAR)) && !(dstat & (MDPE|BF|ABRT|SIR)) && ((INL(nc_dbc) & 0xf8000000) == SCR_WAIT_DISC)) { /* ** Data cycles while waiting for disconnect. ** Force disconnect. */ OUTB (nc_scntl1, 0); /* ** System may hang, but timeout will handle that. ** In fact, timeout can handle ALL problems :-) */ OUTB (nc_dcntl, (STD|NOCOM)); return; }; /*---------------------------------------- ** single step **---------------------------------------- */ if ((dstat & SSI) && !(sist & (STO|GEN|HTH|MA|SGE|UDC|RST|PAR)) && !(dstat & (MDPE|BF|ABRT|SIR|IID))) { OUTB (nc_dcntl, (STD|NOCOM)); return; }; /* ** @RECOVER@ HTH, SGE, ABRT. ** ** We should try to recover from these interrupts. ** They may occur if there are problems with synch transfers, ** or if targets are powerswitched while the driver is running. */ if (sist & SGE) { OUTB (nc_ctest3, CLF); /* clear scsi offsets */ } #ifdef SCSI_NCR_DEBUG /* ** Freeze controller to be able to read the messages. */ if (ncr_debug & DEBUG_FREEZE) { int i; unsigned char val; for (i=0; i<0x60; i++) { switch (i%16) { case 0: printf ("%s: reg[%d0]: ", ncr_name(np),i/16); break; case 4: case 8: case 12: printf (" "); break; }; val = ((unsigned char*) np->vaddr) [i]; printf (" %x%x", val/16, val%16); if (i%16==15) printf (".\n"); }; untimeout (TIMEOUT ncr_timeout, (caddr_t) np); printf ("%s: halted!\n", ncr_name(np)); /* ** don't restart controller ... */ OUTB (nc_istat, SRST); return; }; #endif /* SCSI_NCR_DEBUG */ /* ** sorry, have to kill ALL jobs ... */ ncr_init (np, "fatal error", HS_FAIL); } /*========================================================== ** ** ncr chip exception handler for selection timeout ** **========================================================== ** ** There seems to be a bug in the 53c810. ** Although a STO-Interupt is pending, ** it continues executing script commands. ** But it will fail and interrupt (IID) on ** the next instruction where it's looking ** for a valid phase. ** **---------------------------------------------------------- */ void ncr_int_sto (ncb_p np) { u_long dsa, scratcha, diff; ccb_p cp; #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_TINY) printf ("T"); #endif /* SCSI_NCR_DEBUG */ /* ** look for ccb and set the status. */ dsa = INL (nc_dsa); cp = &np->ccb; while (cp && (vtophys(&cp->phys) != dsa)) cp = cp->link_ccb; if (cp) { cp-> host_status = HS_SEL_TIMEOUT; ncr_complete (np, cp); }; /* ** repair start queue */ scratcha = INL (nc_scratcha); diff = scratcha - vtophys(&np->script->tryloop); assert ((diff <= MAX_START * 20) && !(diff % 20)); if ((diff <= MAX_START * 20) && !(diff % 20)) { np->script->startpos[0] = scratcha; OUTL (nc_dsp, vtophys (&np->script->start)); return; }; ncr_init (np, "selection timeout", HS_FAIL); } /*========================================================== ** ** ** ncr chip exception handler for phase errors. ** ** **========================================================== ** ** We have to construct a new transfer descriptor, ** to transfer the rest of the current block. ** **---------------------------------------------------------- */ static void ncr_int_ma (ncb_p np) { u_long dbc; u_long rest; u_long dsa; u_long dsp; u_long nxtdsp; u_long *vdsp; u_long oadr, olen; u_long *tblp, *newcmd; u_char cmd, sbcl, delta, ss0, ss2; ccb_p cp; dsp = INL (nc_dsp); dsa = INL (nc_dsa); dbc = INL (nc_dbc); ss0 = INB (nc_sstat0); ss2 = INB (nc_sstat2); sbcl= INB (nc_sbcl); cmd = dbc >> 24; rest= dbc & 0xffffff; delta=(INB (nc_dfifo) - rest) & 0x7f; /* ** The data in the dma fifo has not been transfered to ** the target -> add the amount to the rest ** and clear the data. ** Check the sstat2 register in case of wide transfer. */ if (! (INB(nc_dstat) & DFE)) rest += delta; if (ss0 & OLF) rest++; if (ss0 & ORF) rest++; if (INB(nc_scntl3) & EWS) { if (ss2 & OLF1) rest++; if (ss2 & ORF1) rest++; }; OUTB (nc_ctest3, CLF ); /* clear dma fifo */ OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */ /* ** verify cp */ dsa = INL (nc_dsa); cp = &np->ccb; while (cp && (vtophys(&cp->phys) != dsa)) cp = cp->link_ccb; assert (cp == np->header.cp); assert (cp); if (!cp) return; /* ** find the interrupted script command, ** and the address at where to continue. */ if (dsp == vtophys (&cp->patch[2])) { vdsp = &cp->patch[0]; nxtdsp = vdsp[3]; } else if (dsp == vtophys (&cp->patch[6])) { vdsp = &cp->patch[4]; nxtdsp = vdsp[3]; } else { vdsp = (u_long*) ((char*)np->script - vtophys(np->script) + dsp -8); nxtdsp = dsp; }; #ifdef SCSI_NCR_DEBUG /* ** log the information */ if (ncr_debug & (DEBUG_TINY|DEBUG_PHASE)) { printf ("P%d%d ",cmd&7, sbcl&7); printf ("RL=%d D=%d SS0=%x ",rest,delta,ss0); }; if (ncr_debug & DEBUG_PHASE) { printf ("\nCP=%x CP2=%x DSP=%x NXT=%x VDSP=%x CMD=%x ", cp, np->header.cp, dsp, nxtdsp, vdsp, cmd); }; #endif /* SCSI_NCR_DEBUG */ /* ** get old startaddress and old length. */ oadr = vdsp[1]; if (cmd & 0x10) { /* Table indirect */ tblp = (u_long*) ((char*) &cp->phys + oadr); olen = tblp[0]; oadr = tblp[1]; } else { tblp = (u_long*) 0; olen = vdsp[0] & 0xffffff; }; #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_PHASE) { printf ("OCMD=%x\nTBLP=%x OLEN=%x OADR=%x\n", vdsp[0] >> 24, tblp, olen, oadr); }; #endif /* SCSI_NCR_DEBUG */ /* ** if old phase not dataphase, leave here. */ assert (cmd == (vdsp[0] >> 24)); if (cmd & 0x06) { PRINT_ADDR(cp->xfer); printf ("phase change %d-%d %d@%x resid=%d.\n", cmd&7, sbcl&7, olen, oadr, rest); OUTB (nc_dcntl, (STD|NOCOM)); return; }; /* ** choose the correct patch area. ** if savep points to one, choose the other. */ newcmd = cp->patch; if (cp->phys.header.savep == vtophys (newcmd)) newcmd+=4; /* ** fillin the commands */ newcmd[0] = ((cmd & 0x0f) << 24) | rest; newcmd[1] = oadr + olen - rest; newcmd[2] = SCR_JUMP; newcmd[3] = nxtdsp; #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_PHASE) { PRINT_ADDR(cp->xfer); printf ("newcmd[%d] %x %x %x %x.\n", newcmd - cp->patch, newcmd[0], newcmd[1], newcmd[2], newcmd[3]); } #endif /* SCSI_NCR_DEBUG */ /* ** fake the return address (to the patch). ** and restart script processor at dispatcher. */ np->profile.num_break++; OUTL (nc_temp, vtophys (newcmd)); OUTL (nc_dsp, vtophys (&np->script->dispatch)); } /*========================================================== ** ** ** ncr chip exception handler for programmed interrupts. ** ** **========================================================== */ static int ncr_show_msg (u_char * msg) { u_char i; printf ("%x",*msg); if (*msg==M_EXTENDED) { for (i=1;i<8;i++) { if (i-1>msg[1]) break; printf ("-%x",msg[i]); }; return (i+1); } else if ((*msg & 0xf0) == 0x20) { printf ("-%x",msg[1]); return (2); }; return (1); } void ncr_int_sir (ncb_p np) { u_char chg, ofs, per, fak, wide; u_char num = INB (nc_dsps); ccb_p cp=0; u_long dsa; u_char target = INB (nc_ctest0) & 7; tcb_p tp = &np->target[target]; int i; #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_TINY) printf ("I#%d", num); #endif /* SCSI_NCR_DEBUG */ switch (num) { case SIR_SENSE_RESTART: case SIR_STALL_RESTART: break; default: /* ** lookup the ccb */ dsa = INL (nc_dsa); cp = &np->ccb; while (cp && (vtophys(&cp->phys) != dsa)) cp = cp->link_ccb; assert (cp == np->header.cp); assert (cp); if (!cp) goto out; } switch (num) { /*-------------------------------------------------------------------- ** ** Processing of interrupted getcc selects ** **-------------------------------------------------------------------- */ case SIR_SENSE_RESTART: /*------------------------------------------ ** Script processor is idle. ** Look for interrupted "check cond" **------------------------------------------ */ #ifdef NCR_DEBUG if (ncr_debug & DEBUG_RESTART) printf ("%s: int#%d",ncr_name (np),num); #endif /* SCSI_NCR_DEBUG */ cp = (ccb_p) 0; for (i=0; itarget[i]; #ifdef NCR_DEBUG if (ncr_debug & DEBUG_RESTART) printf ("+"); #endif /* SCSI_NCR_DEBUG */ cp = tp->hold_cp; if (!cp) continue; #ifdef NCR_DEBUG if (ncr_debug & DEBUG_RESTART) printf ("+"); #endif /* SCSI_NCR_DEBUG */ if ((cp->host_status==HS_BUSY) && (cp->scsi_status==S_CHECK_COND)) break; #ifdef NCR_DEBUG if (ncr_debug & DEBUG_RESTART) printf ("- (remove)"); #endif /* SCSI_NCR_DEBUG */ tp->hold_cp = cp = (ccb_p) 0; }; if (cp) { #ifdef NCR_DEBUG if (ncr_debug & DEBUG_RESTART) printf ("+ restart job ..\n"); #endif /* SCSI_NCR_DEBUG */ OUTL (nc_dsa, vtophys (&cp->phys)); OUTL (nc_dsp, vtophys (&np->script->getcc)); return; }; /* ** no job, resume normal processing */ #ifdef NCR_DEBUG if (ncr_debug & DEBUG_RESTART) printf (" -- remove trap\n"); #endif /* SCSI_NCR_DEBUG */ np->script->start0[0] = SCR_INT ^ IFFALSE (0); break; case SIR_SENSE_FAILED: /*------------------------------------------- ** While trying to reselect for ** getting the condition code, ** a target reselected us. **------------------------------------------- */ PRINT_ADDR(cp->xfer); #ifdef NCR_DEBUG if (ncr_debug & DEBUG_RESTART) printf ("in getcc reselect by t%d.\n", INB(nc_ssid)&7); #endif /* SCSI_NCR_DEBUG */ /* ** Mark this job */ cp->host_status = HS_BUSY; cp->scsi_status = S_CHECK_COND; np->target[cp->xfer->TARGET].hold_cp = cp; /* ** And patch code to restart it. */ np->script->start0[0] = SCR_INT; break; /*----------------------------------------------------------------------------- ** ** Was Sie schon immer ueber transfermode negotiation wissen wollten ... ** ** We try to negotiate sync and wide transfer only after ** a successfull inquire command. We look to byte 7 of the ** inquire data to determine the capabilities if the target. ** ** When we try to negotiate, we append the negotiation message ** to the identify and (maybe) simpletag message. ** The host status field is set to HS_NEGOTIATE to mark this ** situation. ** ** If the target doesn't answer this message immidiately ** (as required by the standard), the SIR_NEGO_FAIL interrupt ** will be raised eventually. ** The handler removes the HS_NEGOTIATE status, and sets the ** negotiated value to the default (async / nowide). ** ** If we receive a matching answer immediately, we check it ** for validity, and set the values. ** ** If we receive a Reject message immediately, we assume the ** negotiation has failed, and set to the standard values. ** ** If we receive a negotiation message while not in HS_NEGOTIATE ** state, it's a target initiated negotiation. We prepare a ** (hopefully) valid answer, set the values, and send this ** answer back to the target. ** ** If the target doesn't fetch the answer (no message out phase), ** we assume the negotiation has failed, and set the values to ** the default. ** ** When we set the values, we set in all ccbs belonging to this ** target, in the controllers register, and in the "phys" ** field of the controllers struct ncb. ** ** Possible cases: hs sir msg_in value send goto ** We try try to negotiate: ** -> target doesnt't msgin NEG FAIL noop defa. - dispatch ** -> target rejected our msg NEG FAIL reject defa. - dispatch ** -> target answered (ok) NEG SYNC sdtr set - clrack ** -> target answered (!ok) NEG SYNC sdtr defa. REJ--->msg_bad ** -> target answered (ok) NEG WIDE wdtr set - clrack ** -> target answered (!ok) NEG WIDE wdtr defa. REJ--->msg_bad ** -> any other msgin NEG FAIL noop defa - dispatch ** ** Target tries to negotiate: ** -> incoming message --- SYNC sdtr set SDTR - ** -> incoming message --- WIDE wdtr set WDTR - ** We sent our answer: ** -> target doesn't msgout --- PROTO ? defa. - dispatch ** **----------------------------------------------------------------------------- */ case SIR_NEGO_FAILED: /*------------------------------------------------------- ** ** Negotiation failed. ** Target doesn't send an answer message, ** or target rejected our message. ** ** Remove negotiation request. ** **------------------------------------------------------- */ OUTB (HS_PRT, HS_BUSY); /* fall through */ case SIR_NEGO_PROTO: /*------------------------------------------------------- ** ** Negotiation failed. ** Target doesn't fetch the answer message. ** **------------------------------------------------------- */ #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_NEGO) { PRINT_ADDR(cp->xfer); printf ("negotiation failed sir=%x status=%x.\n", num, cp->nego_status); }; #endif /* SCSI_NCR_DEBUG */ /* ** any error in negotiation: ** fall back to default mode. */ switch (cp->nego_status) { case NS_SYNC: ncr_setsync (np, cp, 0xe0); break; case NS_WIDE: ncr_setwide (np, cp, 0); break; }; np->msgin [0] = M_NOOP; np->msgout[0] = M_NOOP; cp->nego_status = 0; OUTL (nc_dsp,vtophys (&np->script->dispatch)); break; case SIR_NEGO_SYNC: /* ** Synchronous request message received. */ #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_NEGO) { PRINT_ADDR(cp->xfer); printf ("sync msgin: "); (void) ncr_show_msg (np->msgin); printf (".\n"); }; #endif /* SCSI_NCR_DEBUG */ /* ** get requested values. */ chg = 0; per = np->msgin[3]; ofs = np->msgin[4]; if (ofs==0) per=255; /* ** if target sends SDTR message, ** it CAN transfer synch. */ if (ofs) tp->inqdata[7] |= INQ7_SYNC; /* ** check values against driver limits. */ if (per < np->ns_sync) {chg = 1; per = np->ns_sync;} if (per < tp->minsync) {chg = 1; per = tp->minsync;} if (ofs > tp->maxoffs) {chg = 1; ofs = tp->maxoffs;} /* ** Check against controller limits. */ fak = (4ul * per - 1) / np->ns_sync - 3; if (ofs && (fak>7)) {chg = 1; ofs = 0;} if (!ofs) fak=7; #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_NEGO) { PRINT_ADDR(cp->xfer); printf ("sync: per=%d ofs=%d fak=%d chg=%d.\n", per, ofs, fak, chg); } #endif /* SCSI_NCR_DEBUG */ if (INB (HS_PRT) == HS_NEGOTIATE) { OUTB (HS_PRT, HS_BUSY); switch (cp->nego_status) { case NS_SYNC: /* ** This was an answer message */ if (chg) { /* ** Answer wasn't acceptable. */ ncr_setsync (np, cp, 0xe0); OUTL (nc_dsp,vtophys (&np->script->msg_bad)); } else { /* ** Answer is ok. */ ncr_setsync (np, cp, (fak<<5)|ofs); OUTL (nc_dsp,vtophys (&np->script->clrack)); }; return; case NS_WIDE: ncr_setwide (np, cp, 0); break; }; }; /* ** It was a request. Set value and ** prepare an answer message */ ncr_setsync (np, cp, (fak<<5)|ofs); np->msgout[0] = M_EXTENDED; np->msgout[1] = 3; np->msgout[2] = M_X_SYNC_REQ; np->msgout[3] = per; np->msgout[4] = ofs; np->msgin [0] = M_NOOP; cp->nego_status = NS_SYNC; #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_NEGO) { PRINT_ADDR(cp->xfer); printf ("sync msgout: "); (void) ncr_show_msg (np->msgin); printf (".\n"); } #endif /* SCSI_NCR_DEBUG */ break; case SIR_NEGO_WIDE: /* ** Wide request message received. */ #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_NEGO) { PRINT_ADDR(cp->xfer); printf ("wide msgin: "); (void) ncr_show_msg (np->msgin); printf (".\n"); }; #endif /* SCSI_NCR_DEBUG */ /* ** get requested values. */ chg = 0; wide = np->msgin[3]; /* ** if target sends WDTR message, ** it CAN transfer wide. */ if (wide) tp->inqdata[7] |= INQ7_WIDE16; /* ** check values against driver limits. */ if (wide > tp->usrwide) {chg = 1; wide = tp->usrwide;} #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_NEGO) { PRINT_ADDR(cp->xfer); printf ("wide: wide=%d chg=%d.\n", wide, chg); } #endif /* SCSI_NCR_DEBUG */ if (INB (HS_PRT) == HS_NEGOTIATE) { OUTB (HS_PRT, HS_BUSY); switch (cp->nego_status) { case NS_WIDE: /* ** This was an answer message */ if (chg) { /* ** Answer wasn't acceptable. */ ncr_setwide (np, cp, 0); OUTL (nc_dsp,vtophys (&np->script->msg_bad)); } else { /* ** Answer is ok. */ ncr_setwide (np, cp, wide); OUTL (nc_dsp,vtophys (&np->script->clrack)); }; return; case NS_SYNC: ncr_setsync (np, cp, 0xe0); break; }; }; /* ** It was a request, set value and ** prepare an answer message */ ncr_setwide (np, cp, wide); np->msgout[0] = M_EXTENDED; np->msgout[1] = 2; np->msgout[2] = M_X_WIDE_REQ; np->msgout[3] = wide; np->msgin [0] = M_NOOP; cp->nego_status = NS_WIDE; #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_NEGO) { PRINT_ADDR(cp->xfer); printf ("wide msgout: "); (void) ncr_show_msg (np->msgin); printf (".\n"); } #endif /* SCSI_NCR_DEBUG */ break; /*-------------------------------------------------------------------- ** ** Processing of special messages ** **-------------------------------------------------------------------- */ case SIR_REJECT_RECEIVED: /*----------------------------------------------- ** ** We received a M_REJECT message. ** **----------------------------------------------- */ PRINT_ADDR(cp->xfer); printf ("M_REJECT received (%x:%x).\n", np->lastmsg, np->msgout[0]); break; case SIR_REJECT_SENT: /*----------------------------------------------- ** ** We received an unknown message ** **----------------------------------------------- */ PRINT_ADDR(cp->xfer); printf ("M_REJECT sent for "); (void) ncr_show_msg (np->msgin); printf (".\n"); break; /*-------------------------------------------------------------------- ** ** Processing of special messages ** **-------------------------------------------------------------------- */ case SIR_IGN_RESIDUE: /*----------------------------------------------- ** ** We received an IGNORE RESIDUE message, ** which couldn't be handled by the script. ** **----------------------------------------------- */ PRINT_ADDR(cp->xfer); printf ("M_IGN_RESIDUE received, but not yet implemented.\n"); break; case SIR_MISSING_SAVE: /*----------------------------------------------- ** ** We received an DISCONNECT message, ** but the datapointer wasn't saved before. ** **----------------------------------------------- */ PRINT_ADDR(cp->xfer); printf ("M_DISCONNECT received, but datapointer not saved:\n" " data=%x save=%x goal=%x.\n", INL (nc_temp), np->header.savep, np->header.goalp); break; /*-------------------------------------------------------------------- ** ** Processing of a "S_QUEUE_FULL" status. ** ** The current command has been rejected, ** because there are too many in the command queue. ** We have started too many commands for that target. ** ** If possible, reinsert at head of queue. ** Stall queue until there are no disconnected jobs ** (ncr is REALLY idle). Then restart processing. ** ** We should restart the current job after the controller ** has become idle. But this is not yet implemented. ** **-------------------------------------------------------------------- */ case SIR_STALL_QUEUE: /*----------------------------------------------- ** ** Stall the start queue. ** **----------------------------------------------- */ PRINT_ADDR(cp->xfer); printf ("queue full.\n"); np->script->start1[0] = SCR_INT; /* ** Try to disable tagged transfers. */ ncr_setmaxtags (&np->target[target], 0); /* ** @QUEUE@ ** ** Should update the launch field of the ** current job to be able to restart it. ** Then prepend it to the start queue. */ /* fall through */ case SIR_STALL_RESTART: /*----------------------------------------------- ** ** Enable selecting again, ** if NO disconnected jobs. ** **----------------------------------------------- */ /* ** Look for a disconnected job. */ cp = &np->ccb; while (cp && cp->host_status != HS_DISCONNECT) cp = cp->link_ccb; /* ** if there is one, ... */ if (cp) { /* ** wait for reselection */ OUTL (nc_dsp, vtophys (&np->script->reselect)); return; }; /* ** else remove the interrupt. */ printf ("%s: queue empty.\n", ncr_name (np)); np->script->start1[0] = SCR_INT ^ IFFALSE (0); break; }; out: OUTB (nc_dcntl, (STD|NOCOM)); } /*========================================================== ** ** ** Aquire a control block ** ** **========================================================== */ static ccb_p ncr_get_ccb (ncb_p np, u_long flags, u_long target, u_long lun) { lcb_p lp; ccb_p cp = (ccb_p ) 0; /* ** Lun structure available ? */ lp = np->target[target].lp[lun]; if (lp) cp = lp->next_ccb; /* ** Look for free CCB */ while (cp && cp->magic) cp = cp->next_ccb; /* ** if nothing available, take the default. */ if (!cp) cp = &np->ccb; /* ** Wait until available. */ while (cp->magic) { if (flags & SCSI_NOSLEEP) break; if (tsleep ((caddr_t)cp, PZERO|PCATCH, "ncr", 0)) break; }; if (cp->magic) return ((ccb_p) 0); cp->magic = 1; return (cp); } /*========================================================== ** ** ** Release one control block ** ** **========================================================== */ void ncr_free_ccb (ncb_p np, ccb_p cp, int flags) { /* ** sanity */ if (!cp) return; cp -> host_status = HS_IDLE; cp -> magic = 0; if (cp == &np->ccb) wakeup ((caddr_t) cp); } /*========================================================== ** ** ** Allocation of resources for Targets/Luns/Tags. ** ** **========================================================== */ static void ncr_alloc_ccb (ncb_p np, struct scsi_xfer * xp) { tcb_p tp; lcb_p lp; ccb_p cp; u_long target; u_long lun; if (!np) return; if (!xp) return; target = xp->TARGET; lun = xp->LUN; if (target>=MAX_TARGET) return; if (lun >=MAX_LUN ) return; tp=&np->target[target]; if (!tp->jump_tcb.l_cmd) { /* ** initialize it. */ tp->jump_tcb.l_cmd = (SCR_JUMP^IFFALSE (DATA (0x80 + target))); tp->jump_tcb.l_paddr = np->jump_tcb.l_paddr; tp->getscr[0] = SCR_COPY (1); tp->getscr[1] = vtophys (&tp->sval); tp->getscr[2] = np->paddr + offsetof (struct ncr_reg, nc_sxfer); tp->getscr[3] = SCR_COPY (1); tp->getscr[4] = vtophys (&tp->wval); tp->getscr[5] = np->paddr + offsetof (struct ncr_reg, nc_scntl3); assert (( (offsetof(struct ncr_reg, nc_sxfer) ^ offsetof(struct tcb , sval )) &3) == 0); assert (( (offsetof(struct ncr_reg, nc_scntl3) ^ offsetof(struct tcb , wval )) &3) == 0); tp->call_lun.l_cmd = (SCR_CALL); tp->call_lun.l_paddr = vtophys (&np->script->resel_lun); tp->jump_lcb.l_cmd = (SCR_JUMP); tp->jump_lcb.l_paddr = vtophys (&np->script->abort); np->jump_tcb.l_paddr = vtophys (&tp->jump_tcb); } /* ** Logic unit control block */ lp = tp->lp[lun]; if (!lp) { /* ** Allocate a lcb */ lp = (lcb_p) malloc (sizeof (struct lcb), M_DEVBUF, M_NOWAIT); if (!lp) return; /* ** Initialize it */ bzero (lp, sizeof (*lp)); lp->jump_lcb.l_cmd = (SCR_JUMP ^ IFFALSE (DATA (lun))); lp->jump_lcb.l_paddr = tp->jump_lcb.l_paddr; lp->call_tag.l_cmd = (SCR_CALL); lp->call_tag.l_paddr = vtophys (&np->script->resel_tag); lp->jump_ccb.l_cmd = (SCR_JUMP); lp->jump_ccb.l_paddr = vtophys (&np->script->aborttag); lp->actlink = 1; /* ** Link into Lun-Chain */ tp->jump_lcb.l_paddr = vtophys (&lp->jump_lcb); tp->lp[lun] = lp; } /* ** Limit possible number of ccbs. ** ** If tagged command queueing is enabled, ** can use more than one ccb. */ if (np->actccbs >= MAX_START-2) return; if (lp->actccbs && (lp->actccbs >= lp->reqccbs)) return; /* ** Allocate a ccb */ cp = (ccb_p) malloc (sizeof (struct ccb), M_DEVBUF, M_NOWAIT); if (!cp) return; #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_ALLOC) { PRINT_ADDR(xp); printf ("new ccb @%x.\n", cp); } #endif /* SCSI_NCR_DEBUG */ /* ** Count it */ lp->actccbs++; np->actccbs++; /* ** Initialize it. */ bzero (cp, sizeof (*cp)); /* ** link in reselect chain. */ cp->jump_ccb.l_cmd = SCR_JUMP; cp->jump_ccb.l_paddr = lp->jump_ccb.l_paddr; lp->jump_ccb.l_paddr = vtophys(&cp->jump_ccb); cp->call_tmp.l_cmd = SCR_CALL; cp->call_tmp.l_paddr = vtophys(&np->script->resel_tmp); /* ** link in wakeup chain */ cp->link_ccb = np->ccb.link_ccb; np->ccb.link_ccb = cp; /* ** Link into CCB-Chain */ cp->next_ccb = lp->next_ccb; lp->next_ccb = cp; } /*========================================================== ** ** ** Announce the number of ccbs/tags to the scsi driver. ** ** **========================================================== */ static void ncr_opennings (ncb_p np, lcb_p lp, struct scsi_xfer * xp) { #ifndef ANCIENT /* ** want to reduce the number ... */ if (lp->actlink > lp->reqlink) { /* ** Try to reduce the count. ** We assume to run at splbio .. */ u_char diff = lp->actlink - lp->reqlink; if (!diff) return; if (diff > xp->sc_link->opennings) diff = xp->sc_link->opennings; xp->sc_link->opennings -= diff; lp->actlink -= diff; #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_TAGS) printf ("%s: actlink: diff=%d, new=%d, req=%d\n", ncr_name(np), diff, lp->actlink, lp->reqlink); #endif /* SCSI_NCR_DEBUG */ return; }; /* ** want to increase the number ? */ if (lp->reqlink > lp->actlink) { u_char diff = lp->reqlink - lp->actlink; xp->sc_link->opennings += diff; lp->actlink += diff; wakeup ((caddr_t) xp->sc_link); #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_TAGS) printf ("%s: actlink: diff=%d, new=%d, req=%d\n", ncr_name(np), diff, lp->actlink, lp->reqlink); #endif }; #endif } /*========================================================== ** ** ** Build Scatter Gather Block ** ** **========================================================== ** ** The transfer area may be scattered among ** several non adjacent physical pages. ** ** We may use MAX_SCATTER blocks. ** **---------------------------------------------------------- */ static int ncr_scatter (struct dsb* phys, vm_offset_t vaddr, vm_size_t datalen) { u_long paddr, pnext; u_short segment = 0; u_long segsize, segaddr; u_long size, csize = 0; u_long chunk = MAX_SIZE; int free; bzero (&phys->data, sizeof (phys->data)); if (!datalen) return (0); paddr = vtophys (vaddr); /* ** insert extra break points at a distance of chunk. ** We try to reduce the number of interrupts due to ** unexpected phase changes due to disconnects. ** A typical harddisk may disconnect before ANY block. ** If we want to avoid unexpected phase changes at all ** we have to use a break point every 512 bytes. ** Of course the number of scatter/gather blocks is ** limited. */ free = MAX_SCATTER - 1; if (vaddr & (NBPG-1)) free -= datalen / NBPG; if (free>1) while ((chunk * free >= 2 * datalen) && (chunk>=1024)) chunk /= 2; #ifdef SCSI_NCR_DEBUG if(ncr_debug & DEBUG_SCATTER) printf("ncr?:\tscattering virtual=0x%x size=%d chunk=%d.\n", (u_long) vaddr, (u_long) datalen, chunk); #endif /* SCSI_NCR_DEBUG */ /* ** Build data descriptors. */ while (datalen && (segment < MAX_SCATTER)) { /* ** this segment is empty */ segsize = 0; segaddr = paddr; pnext = paddr; if (!csize) csize = chunk; while ((datalen) && (paddr == pnext) && (csize)) { /* ** continue this segment */ pnext = (paddr & (~(NBPG - 1))) + NBPG; /* ** Compute max size */ size = pnext - paddr; /* page size */ if (size > datalen) size = datalen; /* data size */ if (size > csize ) size = csize ; /* chunksize */ segsize += size; vaddr += size; csize -= size; datalen -= size; paddr = vtophys (vaddr); }; #ifdef SCSI_NCR_DEBUG if(ncr_debug & DEBUG_SCATTER) printf ("\tseg #%d addr=%x size=%d (rest=%d).\n", segment, segaddr, segsize, datalen); #endif /* SCSI_NCR_DEBUG */ phys->data[segment].addr = segaddr; phys->data[segment].size = segsize; segment++; } if (datalen) { printf("ncr?: scatter/gather failed (residue=%d).\n", datalen); return (-1); }; return (segment); } /*========================================================== ** ** ** Test the pci bus snoop logic :-( ** ** Has to be called with disabled interupts. ** ** **========================================================== */ static int ncr_snooptest (struct ncb* np) { u_long ncr_rd, ncr_wr, ncr_bk, host_rd, host_wr, pc, err=0; /* ** init */ pc = vtophys (&np->script->snooptest); host_wr = 1; ncr_wr = 2; /* ** Set memory and register. */ ncr_cache = host_wr; OUTL (nc_temp, ncr_wr); /* ** Start script (exchange values) */ OUTL (nc_dsp, pc); /* ** Wait 'til done */ while (!(INB(nc_istat) & (INTF|SIP|DIP))); /* ** Read memory and register. */ host_rd = ncr_cache; ncr_rd = INL (nc_scratcha); ncr_bk = INL (nc_temp); /* ** Reset ncr chip */ OUTB (nc_istat, SRST); OUTB (nc_istat, 0 ); /* ** Show results. */ if (host_wr != ncr_rd) { printf ("CACHE TEST FAILED: host wrote %d, ncr read %d.\n", host_wr, ncr_rd); err |= 1; }; if (host_rd != ncr_wr) { printf ("CACHE TEST FAILED: ncr wrote %d, host read %d.\n", ncr_wr, host_rd); err |= 2; }; if (ncr_bk != ncr_wr) { printf ("CACHE TEST FAILED: ncr wrote %d, read back %d.\n", ncr_wr, ncr_bk); err |= 4; }; return (err); } /*========================================================== ** ** ** Profiling the drivers and targets performance. ** ** **========================================================== */ /* ** Compute the difference in milliseconds. **/ static int ncr_delta (struct timeval * from, struct timeval * to) { if (!from->tv_sec) return (-1); if (!to ->tv_sec) return (-2); return ( (to->tv_sec - from->tv_sec - 2)*1000+ +(to->tv_usec - from->tv_usec + 2000000)/1000); } #define PROFILE cp->phys.header.stamp static void ncb_profile (ncb_p np, ccb_p cp) { int co, da, st, en, di, se, post,work,disc; u_long diff; PROFILE.end = time; st = ncr_delta (&PROFILE.start,&PROFILE.status); if (st<0) return; /* status not reached */ da = ncr_delta (&PROFILE.start,&PROFILE.data); if (da<0) return; /* No data transfer phase */ co = ncr_delta (&PROFILE.start,&PROFILE.command); if (co<0) return; /* command not executed */ en = ncr_delta (&PROFILE.start,&PROFILE.end), di = ncr_delta (&PROFILE.start,&PROFILE.disconnect), se = ncr_delta (&PROFILE.start,&PROFILE.select); post = en - st; /* ** @PROFILE@ Disconnect time invalid if multiple disconnects */ if (di>=0) disc = se-di; else disc = 0; work = (st - co) - disc; diff = (np->disc_phys - np->disc_ref) & 0xff; np->disc_ref += diff; np->profile.num_trans += 1; if (cp->xfer) np->profile.num_bytes += cp->xfer->datalen; np->profile.num_disc += diff; np->profile.ms_setup += co; np->profile.ms_data += work; np->profile.ms_disc += disc; np->profile.ms_post += post; } #undef PROFILE /*========================================================== ** ** ** Device lookup. ** ** @GENSCSI@ should be integrated to scsiconf.c ** ** **========================================================== */ #ifndef NEW_SCSICONF struct table_entry { char * manufacturer; char * model; char * version; u_long info; }; static struct table_entry device_tab[] = { {"WangDAT", "Model 2600", "01.7", QUIRK_NOMSG}, {"WangDAT", "Model 3200", "02.2", QUIRK_NOMSG}, {"", "", "", 0} /* catch all: must be last entry. */ }; static u_long ncr_lookup(char * id) { struct table_entry * p = device_tab; char *d, *r, c; for (;;p++) { d = id+8; r = p->manufacturer; while (c=*r++) if (c!=*d++) break; if (c) continue; d = id+16; r = p->model; while (c=*r++) if (c!=*d++) break; if (c) continue; d = id+32; r = p->version; while (c=*r++) if (c!=*d++) break; if (c) continue; return (p->info); } } #endif /*========================================================== ** ** Determine the ncr's clock frequency. ** This is important for the negotiation ** of the synchronous transfer rate. ** **========================================================== ** ** Note: we have to return the correct value. ** THERE IS NO SAVE DEFAULT VALUE. ** ** We assume that all NCR based boards are delivered ** with a 40Mhz clock. Because we have to divide ** by an integer value greater than 3, only clock ** frequencies of 40Mhz (/4) or 50MHz (/5) permit ** the FAST-SCSI rate of 10MHz. ** **---------------------------------------------------------- */ #ifndef NCR_CLOCK # define NCR_CLOCK 40 #endif /* NCR_CLOCK */ static void ncr_getclock (ncb_p np) { u_char tbl[5] = {6,2,3,4,6}; u_char f; u_char ns_clock = (1000/NCR_CLOCK); /* ** Compute the best value for scntl3. */ f = (2 * MIN_SYNC_PD - 1) / ns_clock; if (!f ) f=1; if (f>4) f=4; np -> ns_sync = (ns_clock * tbl[f]) / 2; np -> rv_scntl3 = f<<4; f = (2 * MIN_ASYNC_PD - 1) / ns_clock; if (!f ) f=1; if (f>4) f=4; np -> ns_async = (ns_clock * tbl[f]) / 2; np -> rv_scntl3 |= f; #ifdef SCSI_NCR_DEBUG if (ncr_debug & DEBUG_TIMING) printf ("%s: sclk=%d async=%d sync=%d (ns) scntl3=0x%x\n", ncr_name (np), ns_clock, np->ns_async, np->ns_sync, np->rv_scntl3); #endif /* SCSI_NCR_DEBUG */ } /*=========================================================================*/ #endif /* KERNEL */