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3a5a6263e3
freebsd-skq/sys/pci/ncr.c
Stefan Eßer 3a5a6263e3 Add support for 16 targets on WIDE SCSI bus. 
This seems to work fine on my 53c810, but really should be tested on
a 53c825 with at least one target set to an ID >= 8.
The script is now copied to memory mapped using vm_page_alloc_contig(),
since it has to be physically contigous. This must be changed, if the
driver is converted into a loadable module !
Two of the probe messages are suppressed, unless "bootverbose" is set.
1995-09-07 20:53:40 +00:00

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/**************************************************************************
**
** $Id: ncr.c,v 1.43 1995/09/05 22:37:59 se Exp $
**
** Device driver for the NCR 53C810 PCI-SCSI-Controller.
**
** FreeBSD / NetBSD
**
**-------------------------------------------------------------------------
**
** Written for 386bsd and FreeBSD by
** Wolfgang Stanglmeier <wolf@cologne.de>
** Stefan Esser <se@mi.Uni-Koeln.de>
**
** Ported to NetBSD by
** Charles M. Hannum <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.
**
***************************************************************************
*/
#define NCR_DATE "pl23 95/09/07"
#define NCR_VERSION (2)
#define MAX_UNITS (16)
#define NCR_GETCC_WITHMSG
/*==========================================================
**
** Configuration and Debugging
**
** May be overwritten in <arch/conf/xxxx>
**
**==========================================================
*/
/*
** 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 (10000)
#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 (1)
#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 (4)
#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 (16)
/*
** 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 in use.
** The calculation below is actually quite silly ...
*/
#define MAX_START (MAX_TARGET + 7 * SCSI_NCR_MAX_TAGS)
/*
** 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) * (long) NBPG)
/*
** other
*/
#define NCR_SNOOP_TIMEOUT (1000000)
/*==========================================================
**
** Include files
**
**==========================================================
*/
#include <stddef.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/proc.h>
#ifdef KERNEL
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/kernel.h>
#ifndef __NetBSD__
#include <machine/clock.h>
#include <machine/cpu.h> /* bootverbose */
#else
#define bootverbose 1
#endif
#include <vm/vm.h>
#include <vm/vm_extern.h>
#endif /* KERNEL */
#ifndef __NetBSD__
#include <sys/devconf.h>
#include <pci/pcivar.h>
#include <pci/pcireg.h>
#include <pci/ncrreg.h>
extern PRINT_ADDR();
#else
#include <sys/device.h>
#include <i386/pci/ncr_reg.h>
#include <i386/pci/pcivar.h>
#include <i386/pci/pcireg.h>
#define DELAY(x) delay(x)
#endif /* __NetBSD */
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#ifndef __NetBSD__
#include <machine/clock.h>
#endif /* __NetBSD */
/*==========================================================
**
** Debugging tags
**
**==========================================================
*/
#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)
/*
** Enable/Disable debug messages.
** Can be changed at runtime too.
*/
#ifdef SCSI_DEBUG_FLAGS
#define DEBUG_FLAGS ncr_debug
#else /* SCSI_DEBUG_FLAGS */
#define SCSI_DEBUG_FLAGS 0
#define DEBUG_FLAGS 0
#endif /* SCSI_DEBUG_FLAGS */
/*==========================================================
**
** 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.
**
**==========================================================
*/
#ifdef NCR_IOMAPPED
#define INB(r) inb (np->port + offsetof(struct ncr_reg, r))
#define INW(r) inw (np->port + offsetof(struct ncr_reg, r))
#define INL(r) inl (np->port + offsetof(struct ncr_reg, r))
#define OUTB(r, val) outb (np->port+offsetof(struct ncr_reg,r),(val))
#define OUTW(r, val) outw (np->port+offsetof(struct ncr_reg,r),(val))
#define OUTL(r, val) outl (np->port+offsetof(struct ncr_reg,r),(val))
#else
#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
#endif
/*==========================================================
**
** 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_NOSYNC (0x10)
#define QUIRK_NOWIDE16 (0x20)
#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)
#define MAX_TAGS (16) /* hard limit */
/*==========================================================
**
** OS dependencies.
**
**==========================================================
*/
#ifdef __NetBSD__
#define INT32 int
#define U_INT32 u_int
#define TIMEOUT (void*)
#else /*__NetBSD__*/
#define PRINT_ADDR(xp) sc_print_addr(xp->sc_link)
#define INT32 int32
#define U_INT32 u_int32
#define TIMEOUT (timeout_func_t)
#endif /*__NetBSD__*/
/*==========================================================
**
** 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)
/*---------------------------------------
**
** 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
** <RESEL_LUN>
*/
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
** <RESEL_TAG>
*/
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 at the choosen 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 scmd ;
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
** <RESEL_TMP>
*/
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;
/*
** 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 chained.
*/
ccb_p link_ccb;
/*
** All ccbs of one target/lun are chained.
*/
ccb_p next_ccb;
/*
** Sense command
*/
u_char sensecmd[6];
/*
** 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;
#else /* !__NetBSD__ */
int unit;
#endif /* __NetBSD__ */
/*-----------------------------------------------
** 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;
/*-----------------------------------------------
** Link to the generic SCSI driver
**-----------------------------------------------
*/
struct scsi_link sc_link;
/*-----------------------------------------------
** 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;
/*-----------------------------------------------
** 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;
/*
** option for M_IDENTIFY message: enables disconnecting
*/
u_char disc;
#ifdef NCR_IOMAPPED
/*
** address of the ncr control registers in io space
*/
u_short port;
#endif
};
/*==========================================================
**
**
** 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 [ 33];
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];
#ifdef NCR_GETCC_WITHMSG
ncrcmd getcc2 [ 33];
#else
ncrcmd getcc2 [ 14];
#endif
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 [ 22];
ncrcmd snooptest [ 9];
ncrcmd snoopend [ 2];
};
/*==========================================================
**
**
** 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 int ncr_intr (ncb_p np);
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 /* NEW_SCSICONF */
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 *);
#else /* !__NetBSD */
static char* ncr_probe (pcici_t tag, pcidi_t type);
static void ncr_attach (pcici_t tag, int unit);
#endif /* __NetBSD__ */
#endif /* KERNEL */
/*==========================================================
**
**
** Global static data.
**
**
**==========================================================
*/
static char ident[] =
"\n$Id: ncr.c,v 1.43 1995/09/05 22:37:59 se Exp $\n";
u_long ncr_version = NCR_VERSION * 11
+ (u_long) sizeof (struct ncb) * 7
+ (u_long) sizeof (struct ccb) * 5
+ (u_long) sizeof (struct lcb) * 3
+ (u_long) sizeof (struct tcb) * 2;
#ifdef KERNEL
#ifndef __NetBSD__
u_long nncr=MAX_UNITS;
ncb_p ncrp [MAX_UNITS];
#endif
static int ncr_debug = SCSI_DEBUG_FLAGS;
int ncr_cache; /* to be aligned _NOT_ static */
/*==========================================================
**
**
** Global static data: auto configure
**
**
**==========================================================
*/
#define NCR_810_ID (0x00011000ul)
#define NCR_815_ID (0x00041000ul)
#define NCR_825_ID (0x00031000ul)
#ifdef __NetBSD__
struct cfdriver ncrcd = {
NULL, "ncr", ncr_probe, ncr_attach, DV_DISK, sizeof(struct ncb)
};
#else /* !__NetBSD__ */
static u_long ncr_count;
struct pci_device ncr_device = {
"ncr",
ncr_probe,
ncr_attach,
&ncr_count,
NULL
};
DATA_SET (pcidevice_set, ncr_device);
#endif /* !__NetBSD__ */
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",
};
#ifdef __NetBSD__
#define ncr_name(np) (np->sc_dev.dv_xname)
#else /* !__NetBSD__ */
static char *ncr_name (ncb_p np)
{
static char name[10];
sprintf(name, "ncr%d", np->unit);
return (name);
}
#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<MAX_START >===========
** || 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 for execution,
** 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 reader)
*/
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,
/*
** remove bogus output signals
*/
SCR_REG_REG (socl, SCR_AND, CACK|CATN),
0,
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_TBL ^ SCR_COMMAND,
offsetof (struct dsb, scmd),
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|SCR_ATN),
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 comparison 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 ..
**
** CAUTION: only little endian architectures supported! XXX
*/
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,
** and remove the ACK signal.
*/
SCR_REG_REG (scntl2, SCR_AND, 0x7f),
0,
SCR_CLR (SCR_ACK|SCR_ATN),
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.
*/
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|SCR_ATN),
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),
#ifdef NCR_GETCC_WITHMSG
/*
** 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),
#endif
}/*-------------------------< 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<MAX_SCATTER >=========
** || 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<MAX_SCATTER >=========
** || 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_CLR (SCR_ACK|SCR_ATN),
0,
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),
}/*-------------------------< SNOOPEND >-------------------*/,{
/*
** 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; i<MAX_START; i++) {
*p++ =SCR_COPY (4);
*p++ =NADDR (squeue[i]);
*p++ =RADDR (dsa);
*p++ =SCR_CALL;
*p++ =PADDR (trysel);
};
*p++ =SCR_JUMP;
*p++ =PADDR(tryloop);
assert ((u_long)p == (u_long)&scr->tryloop + 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; i<MAX_SCATTER; i++) {
*p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN));
*p++ =PADDR (checkatn);
*p++ =SCR_MOVE_TBL ^ SCR_DATA_IN;
*p++ =offsetof (struct dsb, data[i]);
};
*p++ =SCR_CALL;
*p++ =PADDR (checkatn);
*p++ =SCR_JUMP;
*p++ =PADDR (no_data);
assert ((u_long)p == (u_long)&scr->data_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; i<MAX_SCATTER; i++) {
*p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT));
*p++ =PADDR (dispatch);
*p++ =SCR_MOVE_TBL ^ SCR_DATA_OUT;
*p++ =offsetof (struct dsb, data[i]);
};
*p++ =SCR_CALL;
*p++ =PADDR (dispatch);
*p++ =SCR_JUMP;
*p++ =PADDR (no_data);
assert ((u_long)p == (u_long)&scr->data_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*) vm_page_alloc_contig
(round_page(sizeof (struct script)), 0x100000, 0xffffffff, PAGE_SIZE);
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);
};
if (DEBUG_FLAGS & DEBUG_SCRIPT)
printf ("%x: <%x>\n",
(unsigned)(src-1), (unsigned)opcode);
/*
** 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
** <FreeBSD-bugs@freefall.cdrom.com>.
** It should be fixed in the current release.
**
**----------------------------------------------------------
*/
void ncr_min_phys (struct buf *bp)
{
if ((unsigned long)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_815_ID &&
pa->pa_id != NCR_825_ID)
return 0;
return 1;
}
#else /* !__NetBSD__ */
static char* ncr_probe (pcici_t tag, pcidi_t type)
{
switch (type) {
case NCR_810_ID:
return ("ncr 53c810 scsi");
case NCR_815_ID:
return ("ncr 53c815 scsi");
case NCR_825_ID:
return ("ncr 53c825 wide scsi");
}
return (NULL);
}
#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 NetBSD
** 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 void ncr_attach (pcici_t config_id, int unit)
{
ncb_p np = (struct ncb*) 0;
#if ! (__FreeBSD__ >= 2)
extern unsigned bio_imask;
#endif
#if (__FreeBSD__ >= 2)
struct scsibus_data *scbus;
#endif
/*
** allocate structure
*/
if (!np) {
np = (ncb_p) malloc (sizeof (struct ncb), M_DEVBUF, M_WAITOK);
if (!np) return;
ncrp[unit]=np;
}
/*
** initialize structure.
*/
bzero (np, sizeof (*np));
np->unit = unit;
/*
** Try to map the controller chip to
** virtual and physical memory.
*/
if (!pci_map_mem (config_id, 0x14, &np->vaddr, &np->paddr))
return;
#ifdef NCR_IOMAPPED
/*
** Try to map the controller chip into iospace.
*/
if (!pci_map_port (config_id, 0x10, &np->port))
return;
#endif
#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_825_ID:
np->maxwide = 1;
break;
default:
np->maxwide = 0;
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);
DELAY (1000);
OUTB (nc_istat, 0 );
#ifdef NCR_DUMP_REG
/*
** Log the initial register contents
*/
{
int reg;
#ifdef __NetBSD__
u_long config_id = pa->pa_tag;
#endif
for (reg=0; reg<256; reg+=4) {
if (reg%16==0) printf ("reg[%2x]", reg);
printf (" %08x", (int)pci_conf_read (config_id, reg));
if (reg%16==12) printf ("\n");
}
}
/*
** Reset chip, once again.
*/
OUTB (nc_istat, SRST);
DELAY (1000);
OUTB (nc_istat, 0 );
#endif /* NCR_DUMP_REG */
/*
** Now check the cache handling of the pci chipset.
*/
if (ncr_snooptest (np)) {
printf ("CACHE INCORRECTLY CONFIGURED.\n");
return;
};
#ifndef __NetBSD__
/*
** Install the interrupt handler.
*/
if (!pci_map_int (config_id, ncr_intr, np, &bio_imask))
printf ("\tinterruptless mode: reduced performance.\n");
#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);
DELAY (1000);
/*
** Process the reset exception,
** if interrupts are not enabled yet.
** Then enable disconnects.
*/
ncr_exception (np);
np->disc = 1;
/*
** Now let the generic SCSI driver
** look for the SCSI devices on the bus ..
*/
#ifdef __NetBSD__
np->sc_link.adapter_softc = np;
#else /* !__NetBSD__ */
np->sc_link.adapter_unit = unit;
#endif /* !__NetBSD__ */
np->sc_link.adapter_targ = np->myaddr;
np->sc_link.adapter = &ncr_switch;
np->sc_link.device = &ncr_dev;
np->sc_link.flags = 0;
np->sc_link.fordriver = 0;
#ifdef __NetBSD__
config_found(self, &np->sc_link, ncr_print);
#else /* !__NetBSD__ */
#if (__FreeBSD__ >= 2)
scbus = scsi_alloc_bus();
if(!scbus)
return;
scbus->adapter_link = &np->sc_link;
if(np->maxwide)
scbus->maxtarg = 15;
if (bootverbose) {
unsigned t_from = 0;
unsigned t_to = scbus->maxtarg;
unsigned myaddr = np->myaddr;
char *txt_and = "";
printf ("%s scanning for targets ", ncr_name (np));
if (t_from < myaddr) {
printf ("%d..%d ", t_from, myaddr -1);
txt_and = "and ";
}
if (myaddr < t_to)
printf ("%s%d..%d ", txt_and, myaddr +1, t_to);
printf ("(V%d " NCR_DATE ")\n", NCR_VERSION);
}
scsi_attachdevs (scbus);
scbus = NULL; /* Upper-level SCSI code owns this now */
#else
scsi_attachdevs (&np->sc_link);
#endif /* !__FreeBSD__ >= 2 */
#endif /* !__NetBSD__ */
/*
** start the timeout daemon
*/
ncr_timeout (np);
np->lasttime=0;
/*
** Done.
*/
return;
}
/*==========================================================
**
**
** Process pending device interrupts.
**
**
**==========================================================
*/
int
ncr_intr(np)
ncb_p np;
{
int n = 0;
int oldspl = splbio();
if (DEBUG_FLAGS & DEBUG_TINY) printf ("[");
if (INB(nc_istat) & (INTF|SIP|DIP)) {
/*
** Repeat until no outstanding ints
*/
do {
ncr_exception (np);
} while (INB(nc_istat) & (INTF|SIP|DIP));
n=1;
np->ticks = 100;
};
if (DEBUG_FLAGS & DEBUG_TINY) printf ("]\n");
splx (oldspl);
return (n);
}
/*==========================================================
**
**
** Start execution of a SCSI command.
** This is called from the generic SCSI driver.
**
**
**==========================================================
*/
static INT32 ncr_start (struct scsi_xfer * xp)
{
#ifdef __NetBSD__
ncb_p np = xp->sc_link->adapter_softc;
#else /*__NetBSD__*/
ncb_p np = ncrp[xp->sc_link->adapter_unit];
#endif/*__NetBSD__*/
struct scsi_generic * cmd = xp->cmd;
ccb_p cp;
lcb_p lp;
tcb_p tp = &np->target[xp->sc_link->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);
DELAY (1000);
return(COMPLETE);
};
/*---------------------------------------------
**
** Some shortcuts ...
**
**---------------------------------------------
*/
if ((xp->sc_link->target == np->myaddr ) ||
(xp->sc_link->target >= MAX_TARGET) ||
(xp->sc_link->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);
};
};
if (DEBUG_FLAGS & DEBUG_TINY) {
PRINT_ADDR(xp);
printf ("CMD=%x F=%x L=%x ", cmd->opcode,
(unsigned)xp->flags, (unsigned) xp->datalen);
}
/*--------------------------------------------
**
** 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
**
**----------------------------------------------------
*/
oldspl = splbio();
if (!(cp=ncr_get_ccb (np, flags, xp->sc_link->target, xp->sc_link->lun))) {
printf ("%s: no ccb.\n", ncr_name (np));
xp->error = XS_DRIVER_STUFFUP;
splx(oldspl);
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
#ifndef NCR_GETCC_WITHMSG
if (tp->quirks) {
PRINT_ADDR(xp);
printf ("quirks=%x.\n", tp->quirks);
};
#endif
};
/*---------------------------------------------------
**
** negotiation required?
**
**----------------------------------------------------
*/
nego = 0;
if (tp->inqdata[7]) {
/*
** negotiate synchronous transfers?
*/
if (!tp->period) {
if (SCSI_NCR_MAX_SYNC
#if defined (CDROM_ASYNC) || defined (GENERIC)
&& ((tp->inqdata[0] & 0x1f) != 5)
#endif
&& (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->sc_link->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;
if (DEBUG_FLAGS & DEBUG_TAGS) {
PRINT_ADDR(xp);
printf ("using tag #%d.\n", cp->tag);
};
};
} else {
cp->tag=0;
};
/*----------------------------------------------------
**
** Build the identify / tag / sdtr message
**
**----------------------------------------------------
*/
idmsg = M_IDENTIFY | xp->sc_link->lun;
#ifndef NCR_NO_DISCONNECT
/*---------------------------------------------------------------------
** Some users have problems with this driver.
** I assume that the current problems relate to a conflict between
** a disconnect and an immediately following reconnect operation.
** With this option one can prevent the driver from using disconnects.
** Without disconnects the performance will be severely degraded.
** But it may help to trace down the core problem.
**---------------------------------------------------------------------
*/
if ((cp!=&np->ccb) && (np->disc))
idmsg |= 0x40;
#endif
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 ncrcontrol
*/
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;
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->xfer);
printf ("sync msgout: ");
ncr_show_msg (&cp->scsi_smsg [msglen-5]);
printf (".\n");
};
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;
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->xfer);
printf ("wide msgout: ");
ncr_show_msg (&cp->scsi_smsg [msglen-4]);
printf (".\n");
};
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);
splx(oldspl);
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 in 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->sc_link->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
*/
cp->phys.cmd.addr = vtophys (cmd);
cp->phys.cmd.size = xp->cmdlen;
/*
** sense command
*/
cp->phys.scmd.addr = vtophys (&cp->sensecmd);
cp->phys.scmd.size = 6;
/*
** patch requested size into sense command
*/
cp->sensecmd[0] = 0x03;
cp->sensecmd[1] = xp->sc_link->lun << 5;
cp->sensecmd[4] = sizeof(struct scsi_sense_data);
if (xp->req_sense_length)
cp->sensecmd[4] = xp->req_sense_length;
/*
** 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: start this job.
**
**----------------------------------------------------
*/
/*
** 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 start queue.
*/
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;
if(DEBUG_FLAGS & DEBUG_QUEUE)
printf ("%s: queuepos=%d tryoffset=%d.\n", ncr_name (np),
np->squeueput,
(unsigned)(np->script->startpos[0]-
(vtophys(&np->script->tryloop))));
/*
** Script processor may be waiting for reselect.
** Wake it up.
*/
OUTB (nc_istat, SIGP);
/*
** and reenable interrupts
*/
splx (oldspl);
/*
** If interrupts are enabled, return now.
** Command is successfully queued.
*/
if (!(flags & SCSI_NOMASK)) {
if (np->lasttime) {
if(DEBUG_FLAGS & DEBUG_TINY) printf ("Q");
return(SUCCESSFULLY_QUEUED);
};
};
/*----------------------------------------------------
**
** Interrupts not yet enabled - have to poll.
**
**----------------------------------------------------
*/
if (DEBUG_FLAGS & DEBUG_POLL) printf("P");
for (i=xp->timeout; i && !(xp->flags & ITSDONE);i--) {
if ((DEBUG_FLAGS & DEBUG_POLL) && (cp->host_status))
printf ("%c", (cp->host_status & 0xf) + '0');
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), (unsigned) INL(nc_dsp));
ncr_init (np, "timeout", HS_TIMEOUT);
};
if (!(xp->flags & ITSDONE)) {
cp-> host_status = HS_SEL_TIMEOUT;
ncr_complete (np, cp);
};
if (DEBUG_FLAGS & DEBUG_RESULT) {
printf ("%s: result: %x %x.\n",
ncr_name (np), cp->host_status, cp->scsi_status);
};
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!=CCB_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);
if (DEBUG_FLAGS & DEBUG_TINY)
printf ("CCB=%x STAT=%x/%x\n", (unsigned)cp & 0xfff,
cp->host_status,cp->scsi_status);
xp = cp->xfer;
cp->xfer = NULL;
tp = &np->target[xp->sc_link->target];
lp = tp->lp[xp->sc_link->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.
*/
if (xp->cmd->opcode == 0x12) {
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);
};
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;
if (DEBUG_FLAGS & (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");
};
} 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, (unsigned)cp);
xp->error = XS_TIMEOUT;
}
xp->flags |= ITSDONE;
/*
** trace output
*/
if (tp->usrflag & UF_TRACE) {
u_char * p;
int i;
PRINT_ADDR(xp);
printf (" CMD:");
p = (u_char*) &xp->cmd->opcode;
for (i=0; i<xp->cmdlen; 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;
for (i=0; i<xp->req_sense_length; i++)
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.
*/
scsi_done (xp);
}
/*==========================================================
**
**
** 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:
if(DEBUG_FLAGS & DEBUG_TINY) printf ("D");
/* 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;
u_char burstlen;
/*
** Reset chip.
*/
OUTB (nc_istat, SRST);
DELAY (1000);
/*
** Message.
*/
if (msg) printf ("%s: restart (%s).\n", ncr_name (np), msg);
/*
** Clear Start Queue
*/
for (i=0;i<MAX_START;i++)
np -> 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.
*/
if (pci_max_burst_len < 4) {
static u_char tbl[4]={0,0,0x40,0x80};
burstlen = tbl[pci_max_burst_len];
} else burstlen = 0xc0;
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 , RRE|np->myaddr);/* host adapter SCSI address */
OUTW (nc_respid, 1ul<<np->myaddr);/* id to respond to */
OUTB (nc_istat , SIGP ); /* Signal Process */
OUTB (nc_dmode , burstlen); /* Burst length = 2 .. 16 transfers */
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;
/*
** Disable disconnects.
*/
np->disc = 0;
/*
** Fill in target structure.
*/
for (i=0;i<MAX_TARGET;i++) {
tcb_p tp = &np->target[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->sc_link->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->sc_link->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->sc_link->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->sc_link->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; l<MAX_LUN; l++) {
lcb_p lp;
if (!tp) break;
lp=tp->lp[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; t<MAX_TARGET; t++) {
if (!((np->user.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 > MAX_TAGS)
break;
for (t=0; t<MAX_TARGET; t++) {
if (!((np->user.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; t<MAX_TARGET; t++) {
u_long size;
if (!((np->user.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; t<MAX_TARGET; t++) {
if (!((np->user.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) {
/*
** block ncr interrupts
*/
int oldspl = splbio();
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>4) {
/*
** Although we tried to wake it up,
** the script processor didn't respond.
**
** May be a target is hanging,
** or another initator lets a tape device
** rewind with disconnect disabled :-(
**
** We won't accept that.
*/
if (INB (nc_sbcl) & CBSY)
OUTB (nc_scntl1, CRST);
DELAY (1000);
ncr_init (np, "ncr dead ?", 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), (unsigned)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.
*/
ncr_complete (np, cp);
};
splx (oldspl);
}
timeout (TIMEOUT ncr_timeout, (caddr_t) np, step ? step : 1);
if (INB(nc_istat) & (INTF|SIP|DIP)) {
/*
** Process pending interrupts.
*/
int oldspl = splbio ();
if (DEBUG_FLAGS & DEBUG_TINY) printf ("{");
ncr_exception (np);
if (DEBUG_FLAGS & DEBUG_TINY) printf ("}");
splx (oldspl);
};
}
/*==========================================================
**
**
** ncr chip exception handler.
**
**
**==========================================================
*/
void ncr_exception (ncb_p np)
{
u_char istat, dstat;
u_short sist;
u_long dsp, dsa;
int i, script_ofs;
/*
** interrupt on the fly ?
*/
while ((istat = INB (nc_istat)) & INTF) {
if (DEBUG_FLAGS & DEBUG_TINY) printf ("F");
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++;
if (DEBUG_FLAGS & DEBUG_TINY)
printf ("<%d|%x:%x|%x:%x>",
INB(nc_scr0),
dstat,sist,
(unsigned)INL(nc_dsp),
(unsigned)INL(nc_dbc));
if ((dstat==DFE) && (sist==PAR)) return;
/*==========================================================
**
** First the normal cases.
**
**==========================================================
*/
/*-------------------------------------------
** SCSI reset
**-------------------------------------------
*/
if (sist & RST) {
ncr_init (np, bootverbose ? "scsi reset" : NULL, 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; i<sizeof(np->regdump); i++)
((char*)&np->regdump)[i] = ((char*)np->reg)[i];
np->regdump.nc_dstat = dstat;
np->regdump.nc_sist = sist;
};
/*=========================================
** log message for real hard errors
**=========================================
"ncr0 targ 0?: ERROR (ds:si) (so-si-sd) (sxfer/scntl3) @ (dsp:dbc)."
" reg: r0 r1 r2 r3 r4 r5 r6 ..... rf."
exception register:
ds: dstat
si: sist
SCSI bus lines:
so: control lines as driver by NCR.
si: control lines as seen by NCR.
sd: scsi data lines as seen by NCR.
wide/fastmode:
sxfer: (see the manual)
scntl3: (see the manual)
current script command:
dsp: script adress (relative to start of script).
dbc: first word of script command.
First 16 register of the chip:
r0..rf
=============================================
*/
dsp = (unsigned) INL (nc_dsp);
dsa = (unsigned) INL (nc_dsa);
script_ofs = dsp - vtophys(np->script);
printf ("%s:%d: ERROR (%x:%x) (%x-%x-%x) (%x/%x) @ (%x:%08x).\n",
ncr_name (np), INB (nc_ctest0)&0x0f, dstat, sist,
INB (nc_socl), INB (nc_sbcl), INB (nc_sbdl),
INB (nc_sxfer),INB (nc_scntl3), script_ofs,
(unsigned) INL (nc_dbc));
if (((script_ofs & 3) == 0) &&
(unsigned)script_ofs < sizeof(struct script)) {
printf ("\tscript cmd = %08x\n",
*(ncrcmd *)((char*)np->script +script_ofs));
}
printf ("\treg:\t");
for (i=0; i<16;i++)
printf (" %02x", ((u_char*)np->reg)[i]);
printf (".\n");
/*----------------------------------------
** 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 */
}
/*----------------------------------------
** handshake timeout
**----------------------------------------
*/
if (sist & HTH) {
printf ("%s: handshake timeout\n", ncr_name(np));
OUTB (nc_scntl1, CRST);
DELAY (1000);
OUTB (nc_scntl1, 0x00);
OUTB (nc_scr0, HS_FAIL);
OUTL (nc_dsp, vtophys(&np->script->cleanup));
return;
}
/*----------------------------------------
** 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)) {
/*
** Unexpected data cycle while waiting for disconnect.
*/
if (INB(nc_sstat2) & LDSC) {
/*
** It's an early reconnect.
** Let's continue ...
*/
OUTB (nc_dcntl, (STD|NOCOM));
/*
** info message
*/
printf ("%s: INFO: LDSC while IID.\n",
ncr_name (np));
return;
};
printf ("%s: target %d doesn't release the bus.\n",
ncr_name (np), INB (nc_ctest0)&0x0f);
/*
** return without restarting the NCR.
** timeout will do the real work.
*/
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 switched on or off while the driver is running.
*/
if (sist & SGE) {
OUTB (nc_ctest3, CLF); /* clear scsi offsets */
}
/*
** Freeze controller to be able to read the messages.
*/
if (DEBUG_FLAGS & 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;
};
#ifdef NCR_FREEZE
/*
** Freeze system to be able to read the messages.
*/
printf ("ncr: fatal error: system halted - press reset to reboot ...");
(void) splhigh();
for (;;);
#endif
/*
** 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-Interrupt 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;
if (DEBUG_FLAGS & DEBUG_TINY) printf ("T");
/*
** 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 */
/*
** locate matching cp
*/
dsa = INL (nc_dsa);
cp = &np->ccb;
while (cp && (vtophys(&cp->phys) != dsa))
cp = cp->link_ccb;
if (!cp) {
printf ("%s: SCSI phase error fixup: CCB already dequeued (0x%08lx)\n",
ncr_name (np), (u_long) np->header.cp);
return;
}
if (cp != np->header.cp) {
printf ("%s: SCSI phase error fixup: CCB address mismatch (0x%08lx != 0x%08lx)\n",
ncr_name (np), (u_long) cp, (u_long) np->header.cp);
return;
}
/*
** find the interrupted script command,
** and the address at which 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;
};
/*
** log the information
*/
if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_PHASE)) {
printf ("P%x%x ",cmd&7, sbcl&7);
printf ("RL=%d D=%d SS0=%x ",
(unsigned) rest, (unsigned) delta, ss0);
};
if (DEBUG_FLAGS & DEBUG_PHASE) {
printf ("\nCP=%x CP2=%x DSP=%x NXT=%x VDSP=%x CMD=%x ",
(unsigned)cp, (unsigned)np->header.cp,
(unsigned)dsp,
(unsigned)nxtdsp, (unsigned)vdsp, cmd);
};
/*
** 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;
};
if (DEBUG_FLAGS & DEBUG_PHASE) {
printf ("OCMD=%x\nTBLP=%x OLEN=%x OADR=%x\n",
(unsigned) (vdsp[0] >> 24),
(unsigned) tblp,
(unsigned) olen,
(unsigned) oadr);
};
/*
** if old phase not dataphase, leave here.
*/
if (cmd != (vdsp[0] >> 24)) {
PRINT_ADDR(cp->xfer);
printf ("internal error: cmd=%02x != %02x=(vdsp[0] >> 24)\n",
(unsigned)cmd, (unsigned)vdsp[0] >> 24);
return;
}
if (cmd & 0x06) {
PRINT_ADDR(cp->xfer);
printf ("phase change %x-%x %d@%08x resid=%d.\n",
cmd&7, sbcl&7, (unsigned)olen,
(unsigned)oadr, (unsigned)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;
if (DEBUG_FLAGS & DEBUG_PHASE) {
PRINT_ADDR(cp->xfer);
printf ("newcmd[%d] %x %x %x %x.\n",
newcmd - cp->patch,
(unsigned)newcmd[0],
(unsigned)newcmd[1],
(unsigned)newcmd[2],
(unsigned)newcmd[3]);
}
/*
** 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;
if (DEBUG_FLAGS & DEBUG_TINY) printf ("I#%d", num);
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"
**------------------------------------------
*/
if (DEBUG_FLAGS & DEBUG_RESTART)
printf ("%s: int#%d",ncr_name (np),num);
cp = (ccb_p) 0;
for (i=0; i<MAX_TARGET; i++) {
if (DEBUG_FLAGS & DEBUG_RESTART) printf (" t%d", i);
tp = &np->target[i];
if (DEBUG_FLAGS & DEBUG_RESTART) printf ("+");
cp = tp->hold_cp;
if (!cp) continue;
if (DEBUG_FLAGS & DEBUG_RESTART) printf ("+");
if ((cp->host_status==HS_BUSY) &&
(cp->scsi_status==S_CHECK_COND))
break;
if (DEBUG_FLAGS & DEBUG_RESTART) printf ("- (remove)");
tp->hold_cp = cp = (ccb_p) 0;
};
if (cp) {
if (DEBUG_FLAGS & DEBUG_RESTART)
printf ("+ restart job ..\n");
OUTL (nc_dsa, vtophys (&cp->phys));
OUTL (nc_dsp, vtophys (&np->script->getcc));
return;
};
/*
** no job, resume normal processing
*/
if (DEBUG_FLAGS & DEBUG_RESTART) printf (" -- remove trap\n");
np->script->start0[0] = SCR_INT ^ IFFALSE (0);
break;
case SIR_SENSE_FAILED:
/*-------------------------------------------
** While trying to select for
** getting the condition code,
** a target reselected us.
**-------------------------------------------
*/
if (DEBUG_FLAGS & DEBUG_RESTART) {
PRINT_ADDR(cp->xfer);
printf ("in getcc reselect by t%d.\n",
INB(nc_ssid) & 0x0f);
}
/*
** Mark this job
*/
cp->host_status = HS_BUSY;
cp->scsi_status = S_CHECK_COND;
np->target[cp->xfer->sc_link->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 at 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) simple tag 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 fall back to 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 our parameters, and send back
** this answer to the target.
**
** If the target doesn't fetch the answer (no message out phase),
** we assume the negotiation has failed, and fall back to default
** settings.
**
** When we set the values, we adjust them in all ccbs belonging
** to this target, in the controller's register, and in the "phys"
** field of the controller's 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.
**
**-------------------------------------------------------
*/
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->xfer);
printf ("negotiation failed sir=%x status=%x.\n",
num, cp->nego_status);
};
/*
** 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.
*/
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->xfer);
printf ("sync msgin: ");
(void) ncr_show_msg (np->msgin);
printf (".\n");
};
/*
** 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;
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->xfer);
printf ("sync: per=%d ofs=%d fak=%d chg=%d.\n",
per, ofs, fak, chg);
}
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;
cp->nego_status = NS_SYNC;
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->xfer);
printf ("sync msgout: ");
(void) ncr_show_msg (np->msgin);
printf (".\n");
}
if (!ofs) {
OUTL (nc_dsp,vtophys (&np->script->msg_bad));
return;
}
np->msgin [0] = M_NOOP;
break;
case SIR_NEGO_WIDE:
/*
** Wide request message received.
*/
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->xfer);
printf ("wide msgin: ");
(void) ncr_show_msg (np->msgin);
printf (".\n");
};
/*
** 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;}
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->xfer);
printf ("wide: wide=%d chg=%d.\n", wide, chg);
}
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;
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->xfer);
printf ("wide msgout: ");
(void) ncr_show_msg (np->msgin);
printf (".\n");
}
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",
(unsigned)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"
"\tdata=%x save=%x goal=%x.\n",
(unsigned) INL (nc_temp),
(unsigned) np->header.savep,
(unsigned) 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, PRIBIO|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
*/
assert (cp != NULL);
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;
assert (np != NULL);
assert (xp != NULL);
target = xp->sc_link->target;
lun = xp->sc_link->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);
ncr_setmaxtags (tp, SCSI_NCR_MAX_TAGS);
}
/*
** 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;
/*
** Chain into LUN list
*/
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;
if (DEBUG_FLAGS & DEBUG_ALLOC) {
PRINT_ADDR(xp);
printf ("new ccb @%x.\n", (unsigned) cp);
}
/*
** Count it
*/
lp->actccbs++;
np->actccbs++;
/*
** Initialize it
*/
bzero (cp, sizeof (*cp));
/*
** Chain into reselect list
*/
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);
/*
** Chain into wakeup list
*/
cp->link_ccb = np->ccb.link_ccb;
np->ccb.link_ccb = cp;
/*
** Chain into CCB list
*/
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)
{
/*
** 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;
if (DEBUG_FLAGS & DEBUG_TAGS)
printf ("%s: actlink: diff=%d, new=%d, req=%d\n",
ncr_name(np), diff, lp->actlink, lp->reqlink);
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);
if (DEBUG_FLAGS & DEBUG_TAGS)
printf ("%s: actlink: diff=%d, new=%d, req=%d\n",
ncr_name(np), diff, lp->actlink, lp->reqlink);
};
}
/*==========================================================
**
**
** 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 caused
** by unexpected phase changes due to disconnects.
** A typical harddisk may disconnect before ANY block.
** If we wanted to avoid unexpected phase changes at all
** we had 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;
if(DEBUG_FLAGS & DEBUG_SCATTER)
printf("ncr?:\tscattering virtual=0x%x size=%d chunk=%d.\n",
(unsigned) vaddr, (unsigned) datalen, (unsigned) chunk);
/*
** 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);
};
if(DEBUG_FLAGS & DEBUG_SCATTER)
printf ("\tseg #%d addr=%x size=%d (rest=%d).\n",
segment,
(unsigned) segaddr,
(unsigned) segsize,
(unsigned) datalen);
phys->data[segment].addr = segaddr;
phys->data[segment].size = segsize;
segment++;
}
if (datalen) {
printf("ncr?: scatter/gather failed (residue=%d).\n",
(unsigned) datalen);
return (-1);
};
return (segment);
}
/*==========================================================
**
**
** Test the pci bus snoop logic :-(
**
** Has to be called with interrupts disabled.
**
**
**==========================================================
*/
#ifndef NCR_IOMAPPED
static int ncr_regtest (struct ncb* np)
{
register volatile u_long data, *addr;
/*
** ncr registers may NOT be cached.
** write 0xffffffff to a read only register area,
** and try to read it back.
*/
addr = (u_long*) &np->reg->nc_dstat;
data = 0xffffffff;
*addr= data;
data = *addr;
#if 1
if (data == 0xffffffff) {
#else
if ((data & 0xe2f0fffd) != 0x02000080) {
#endif
printf ("CACHE TEST FAILED: reg dstat-sstat2 readback %x.\n",
(unsigned) data);
return (0x10);
};
return (0);
}
#endif
static int ncr_snooptest (struct ncb* np)
{
u_long ncr_rd, ncr_wr, ncr_bk, host_rd, host_wr, pc, err=0;
int i;
#ifndef NCR_IOMAPPED
err |= ncr_regtest (np);
if (err) return (err);
#endif
/*
** 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 (with timeout)
*/
for (i=0; i<NCR_SNOOP_TIMEOUT; i++)
if (INB(nc_istat) & (INTF|SIP|DIP))
break;
/*
** Save termination position.
*/
pc = INL (nc_dsp);
/*
** 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);
DELAY (1000);
OUTB (nc_istat, 0 );
/*
** check for timeout
*/
if (i>=NCR_SNOOP_TIMEOUT) {
printf ("CACHE TEST FAILED: timeout.\n");
return (0x20);
};
/*
** Check termination position.
*/
if (pc != vtophys (&np->script->snoopend)+8) {
printf ("CACHE TEST FAILED: script execution failed.\n");
return (0x40);
};
/*
** Show results.
*/
if (host_wr != ncr_rd) {
printf ("CACHE TEST FAILED: host wrote %d, ncr read %d.\n",
(int) host_wr, (int) ncr_rd);
err |= 1;
};
if (host_rd != ncr_wr) {
printf ("CACHE TEST FAILED: ncr wrote %d, host read %d.\n",
(int) ncr_wr, (int) host_rd);
err |= 2;
};
if (ncr_bk != ncr_wr) {
printf ("CACHE TEST FAILED: ncr wrote %d, read back %d.\n",
(int) ncr_wr, (int) 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[] =
{
#ifdef NCR_GETCC_WITHMSG
{"", "", "", QUIRK_NOMSG},
{"SONY", "SDT-5000", "3.17", QUIRK_NOMSG},
{"WangDAT", "Model 2600", "01.7", QUIRK_NOMSG},
{"WangDAT", "Model 3200", "02.2", QUIRK_NOMSG},
{"WangDAT", "Model 1300", "02.4", QUIRK_NOMSG},
#endif
{"", "", "", 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;
if (DEBUG_FLAGS & 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 /* KERNEL */
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