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freebsd-skq/sys/pci/ncr.c
se 699059201d The NCR script has grown beyond one page (4KB). Since malloc() returns 
contiguous memory in virtual space, but doesn't guarantee any particular
physical layout of pages, the script may be not contguous in physical
memory. This made the first write command fail in very rare cases.
This has been fixed by checking the region returned by malloc() for
being contiguous, but there should be a physical memory allocate
and later mapping to virtual memory instead.

A few assertions and error messages are improved.
1995-09-05 22:37:59 +00:00

6710 lines
140 KiB
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/**************************************************************************
**
** $Id: ncr.c,v 1.42 1995/08/23 23:03:25 gibbs 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_C__ "pl22 95/07/07"
#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 (7)
/*
** Number of logic units supported by the driver.
** n enables logic unit numbers 0..n-1.
** The common SCSI devices require only
** one lun, so take 1 as the default.
*/
#define MAX_LUN (1)
/*
** The maximum number of jobs scheduled for starting.
** There should be one slot per target, and one slot
** for each tag of each target.
*/
#define MAX_START (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>
#endif
#include <vm/vm.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
(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 1.42 1995/08/23 23:03:25 gibbs Exp $\n";
u_long ncr_version = NCR_VERSION
+ (u_long) sizeof (struct ncb)
* (u_long) sizeof (struct ccb)
* (u_long) sizeof (struct lcb)
* (u_long) sizeof (struct tcb);
#ifdef KERNEL
#ifndef __NetBSD__
u_long 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 ncrcmd *src = (ncrcmd *)&script0;
static void ncr_script_copy_and_bind (ncb_p np)
{
ncrcmd opcode, new, old;
ncrcmd *dst, *start, *end;
int relocs;
u_long p_script;
/*
* Test whether last byte of script is at the right
* PHYSICAL address, since the NCR uses phys. addresses only.
* Assumes that the script fits into two 4KB pages ...
*/
assert (sizeof(struct script) <= 8192);
while ((p_script = vtophys (src)) + sizeof (struct script) !=
vtophys ((char *)src + sizeof (struct script))) {
struct script *newsrc = (struct script *)
malloc (sizeof (struct script), M_DEVBUF, M_WAITOK);
memcpy (newsrc, src, sizeof(struct script));
src = (ncrcmd *) newsrc;
printf ("%s: NCR script not physically contigous, retrying\n",
ncr_name(np));
}
np->script = (struct script*) src;
np->p_script = p_script;
dst = (ncrcmd *) malloc (sizeof (struct script), M_DEVBUF, M_WAITOK);
/*
* Copy the script to keep an unmodified version
* to bind for another NCR chip, if present.
*/
memcpy (dst, src, sizeof(struct script));
/*
* Patch the "src" of the memcpy to become the script to execute.
* The copy in the malloc()ed memory at "dst" will be the src of
* the script for the next NCR, if there are multiple chips.
*/
start = src;
end = src + (sizeof(struct script) / 4);
while (src < end) {
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;
}
*src++ = new;
}
} else
src++;
};
/*
* next time use the (unmodified) copy of the script as "src"
*/
src = dst;
}
/*==========================================================
**
**
** 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 (np);
/*
** init data structure
*/
np -> jump_tcb.l_cmd = SCR_JUMP ;
np -> jump_tcb.l_paddr = vtophys (&np->script->abort);
/*
** Make the controller's registers available.
** Now the INB INW INL OUTB OUTW OUTL macros
** can be used safely.
*/
np->reg = (struct ncr_reg*) np->vaddr;
/*
** Get SCSI addr of host adapter (set by bios?).
*/
np->myaddr = INB(nc_scid) & 0x07;
if (!np->myaddr) np->myaddr = SCSI_NCR_MYADDR;
/*
** Get the value of the chip's clock.
** Find the right value for scntl3.
*/
ncr_getclock (np);
/*
** Reset chip.
*/
OUTB (nc_istat, SRST);
OUTB (nc_istat, 0 );
#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);
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.
** than enable disconnects.
*/
ncr_exception (np);
np->disc = 1;
printf ("%s scanning for targets 0..%d (V%d " __NCR_C__ ")\n",
ncr_name (np), MAX_TARGET-1, NCR_VERSION);
/*
** 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;
#ifdef __NetBSD__
config_found(self, &np->sc_link, ncr_print);
#else /* !__NetBSD__ */
#if (__FreeBSD__ >= 2)
scbus = scsi_alloc_bus();
if(!scbus)
return;
/* XXX scbus->maxtarg should be adjusted based on bus width */
scbus->adapter_link = &np->sc_link;
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 );
/*
** 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>10) {
/*
** Although we tried to wakeup it,
** the script processor didn't answer.
**
** May be a target is hanging,
** or another initator lets a tape device
** rewind with disabled disconnect :-(
**
** We won't accept that.
*/
printf ("%s: reset by timeout.\n", ncr_name (np));
OUTB (nc_istat, SRST);
OUTB (nc_istat, 0);
if (INB (nc_sbcl) & CBSY)
OUTB (nc_scntl1, CRST);
ncr_init (np, NULL, HS_TIMEOUT);
np->heartbeat = thistime;
};
/*----------------------------------------------------
**
** handle ccb timeouts
**
**----------------------------------------------------
*/
for (cp=&np->ccb; cp; cp=cp->link_ccb) {
/*
** look for timed out ccbs.
*/
if (!cp->host_status) continue;
count++;
if (cp->tlimit > thistime) continue;
/*
** Disable reselect.
** Remove it from startqueue.
*/
cp->jump_ccb.l_cmd = (SCR_JUMP);
if (cp->phys.header.launch.l_paddr ==
vtophys (&np->script->select)) {
printf ("%s: timeout ccb=%x (skip)\n",
ncr_name (np), (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, "scsi reset", HS_RESET);
return;
};
/*-------------------------------------------
** selection timeout
**
** IID excluded from dstat mask!
** (chip bug)
**-------------------------------------------
*/
if ((sist & STO) &&
!(sist & (GEN|HTH|MA|SGE|UDC|RST|PAR)) &&
!(dstat & (MDPE|BF|ABRT|SIR))) {
ncr_int_sto (np);
return;
};
/*-------------------------------------------
** Phase mismatch.
**-------------------------------------------
*/
if ((sist & MA) &&
!(sist & (STO|GEN|HTH|SGE|UDC|RST|PAR)) &&
!(dstat & (MDPE|BF|ABRT|SIR|IID))) {
ncr_int_ma (np);
return;
};
/*----------------------------------------
** move command with length 0
**----------------------------------------
*/
if ((dstat & IID) &&
!(sist & (STO|GEN|HTH|MA|SGE|UDC|RST|PAR)) &&
!(dstat & (MDPE|BF|ABRT|SIR)) &&
((INL(nc_dbc) & 0xf8000000) == SCR_MOVE_TBL)) {
/*
** Target wants more data than available.
** The "no_data" script will do it.
*/
OUTL (nc_dsp, vtophys(&np->script->no_data));
return;
};
/*-------------------------------------------
** Programmed interrupt
**-------------------------------------------
*/
if ((dstat & SIR) &&
!(sist & (STO|GEN|HTH|MA|SGE|UDC|RST|PAR)) &&
!(dstat & (MDPE|BF|ABRT|IID)) &&
(INB(nc_dsps) <= SIR_MAX)) {
ncr_int_sir (np);
return;
};
/*========================================
** do the register dump
**========================================
*/
if (time.tv_sec - np->regtime.tv_sec>10) {
int i;
np->regtime = time;
for (i=0; 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 - (unsigned) np->p_script,
printf ("%s targ %d?: ERROR (%x:%x) (%x-%x-%x) (%x/%x) @ (%x:%08x).\n",
ncr_name (np), INB (nc_ctest0)&7, dstat, sist,
INB (nc_socl), INB (nc_sbcl), INB (nc_sbdl),
INB (nc_sxfer),INB (nc_scntl3), script_ofs,
(unsigned) INL (nc_dbc));
printf ("\treg:\t");
for (i=0; i<16;i++)
printf (" %x", ((u_char*)np->reg)[i]);
printf (".\n");
if (script_ofs < sizeof(*np->script))
{
u_long vpci;
u_long vpc = ((u_long) np->script) + script_ofs;
for (vpci = vpc; vpci >= 4; vpci -= 4);
while (vpci <= vpc) {
printf ("\tvirt.addr: 0x%08lx instr: 0x%08lx\n",
vpci, *(ncrcmd *)(vpci));
vpci += 4;
}
}
/*----------------------------------------
** clean up the dma fifo
**----------------------------------------
*/
if ( (INB(nc_sstat0) & (ILF|ORF|OLF) ) ||
(INB(nc_sstat1) & (FF3210) ) ||
(INB(nc_sstat2) & (ILF1|ORF1|OLF1)) || /* wide .. */
!(dstat & DFE)) {
printf ("%s: have to clear fifos.\n", ncr_name (np));
OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */
OUTB (nc_ctest3, CLF); /* clear dma fifo */
}
/*----------------------------------------
** unexpected disconnect
**----------------------------------------
*/
if ((sist & UDC) &&
!(sist & (STO|GEN|HTH|MA|SGE|RST|PAR)) &&
!(dstat & (MDPE|BF|ABRT|SIR|IID))) {
OUTB (nc_scr0, HS_UNEXPECTED);
OUTL (nc_dsp, vtophys(&np->script->cleanup));
return;
};
/*----------------------------------------
** cannot disconnect
**----------------------------------------
*/
if ((dstat & IID) &&
!(sist & (STO|GEN|HTH|MA|SGE|UDC|RST|PAR)) &&
!(dstat & (MDPE|BF|ABRT|SIR)) &&
((INL(nc_dbc) & 0xf8000000) == SCR_WAIT_DISC)) {
/*
** 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)&7);
/*
** 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%d%d ",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",
cmd, vdsp[0] >> 24);
return;
}
if (cmd & 0x06) {
PRINT_ADDR(cp->xfer);
printf ("phase change %d-%d %d@%x 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)&7);
}
/*
** 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);
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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