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freebsd-skq/sys/pci/ncr.c
phk ccc7e7fa9f Rename some local variables to avoid shadowing other local variables. 
Found by: -Wshadow
1997-11-07 09:21:01 +00:00

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/**************************************************************************
**
** $Id: ncr.c,v 1.111 1997/09/21 22:02:16 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_DATE "pl24 96/12/14"
#define NCR_VERSION (2)
#define MAX_UNITS (16)
#define NCR_GETCC_WITHMSG
#if defined (__FreeBSD__) && defined(KERNEL)
#include "opt_ncr.h"
#endif /* defined (__FreeBSD__) && defined(KERNEL) */
#ifdef FAILSAFE
#ifndef SCSI_NCR_DFLT_TAGS
#define SCSI_NCR_DFLT_TAGS (0)
#endif /* SCSI_NCR_DFLT_TAGS */
#define CDROM_ASYNC
#endif /* FAILSAFE */
/*==========================================================
**
** 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 default synchronous period factor
** (0=asynchronous)
** If maximum synchronous frequency is defined, use it instead.
*/
#ifndef SCSI_NCR_MAX_SYNC
#ifndef SCSI_NCR_DFLT_SYNC
#define SCSI_NCR_DFLT_SYNC (12)
#endif /* SCSI_NCR_DFLT_SYNC */
#else
#if SCSI_NCR_MAX_SYNC == 0
#define SCSI_NCR_DFLT_SYNC 0
#else
#define SCSI_NCR_DFLT_SYNC (250000 / SCSI_NCR_MAX_SYNC)
#endif
#endif
/*
** The minimal asynchronous pre-scaler period (ns)
** Shall be 40.
*/
#ifndef SCSI_NCR_MIN_ASYNC
#define SCSI_NCR_MIN_ASYNC (40)
#endif /* SCSI_NCR_MIN_ASYNC */
/*
** 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_DFLT_TAGS
#define SCSI_NCR_DFLT_TAGS (4)
#endif /* SCSI_NCR_DFLT_TAGS */
/*==========================================================
**
** Configuration and Debugging
**
**==========================================================
*/
/*
** Number of targets supported by the driver.
** n permits target numbers 0..n-1.
** Default is 7, meaning targets #0..#6.
** #7 .. is myself.
*/
#define MAX_TARGET (16)
/*
** Number of logic units supported by the driver.
** n enables logic unit numbers 0..n-1.
** The common SCSI devices require only
** one lun, so take 1 as the default.
*/
#ifndef MAX_LUN
#define MAX_LUN (8)
#endif /* MAX_LUN */
/*
** The maximum number of jobs scheduled for starting.
** There should be one slot per target, and one slot
** for each tag of each target in use.
** The calculation below is actually quite silly ...
*/
#define MAX_START (MAX_TARGET + 7 * SCSI_NCR_DFLT_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) * PAGE_SIZE.
*/
#define MAX_SIZE ((MAX_SCATTER-1) * (long) PAGE_SIZE)
/*
** other
*/
#define NCR_SNOOP_TIMEOUT (1000000)
/*==========================================================
**
** Include files
**
**==========================================================
*/
#ifdef __NetBSD__
#ifdef _KERNEL
#define KERNEL
#endif
#endif
#include <stddef.h>
#include <sys/param.h>
#include <sys/time.h>
#ifdef KERNEL
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/kernel.h>
#ifdef __NetBSD__
#define bootverbose 1
#endif
#include <sys/sysctl.h>
#ifndef __NetBSD__
#include <machine/clock.h>
#endif
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_extern.h>
#endif /* KERNEL */
#ifndef __NetBSD__
#include <pci/pcivar.h>
#include <pci/pcireg.h>
#include <pci/ncrreg.h>
#else
#include <sys/device.h>
#include <dev/pci/ncr_reg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#define DELAY(x) delay(x)
#endif /* __NetBSD */
#include <scsi/scsiconf.h>
/*==========================================================
**
** 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_NCR_DEBUG
#define DEBUG_FLAGS ncr_debug
#else /* SCSI_NCR_DEBUG */
#define SCSI_NCR_DEBUG 0
#define DEBUG_FLAGS 0
#endif /* SCSI_NCR_DEBUG */
/*==========================================================
**
** assert ()
**
**==========================================================
**
** modified copy from 386bsd:/usr/include/sys/assert.h
**
**----------------------------------------------------------
*/
#define assert(expression) { \
if (!(expression)) { \
(void)printf(\
"assertion \"%s\" failed: file \"%s\", line %d\n", \
#expression, \
__FILE__, __LINE__); \
} \
}
/*==========================================================
**
** Access to the controller chip.
**
**==========================================================
*/
#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))
#define INB_OFF(o) inb (np->port + (o))
#define INW_OFF(o) inw (np->port + (o))
#define INL_OFF(o) inl (np->port + (o))
#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)
#define INB_OFF(o) *( ((u_char *) np->reg) + (o) )
#define INW_OFF(o) *((u_short *) ( ((u_char *) np->reg) + (o)) )
#define INL_OFF(o) *((u_int32_t *) ( ((u_char *) np->reg) + (o)) )
#endif
/*
** Set bit field ON, OFF
*/
#define OUTONB(r, m) OUTB(r, INB(r) | (m))
#define OUTOFFB(r, m) OUTB(r, INB(r) & ~(m))
#define OUTONW(r, m) OUTW(r, INW(r) | (m))
#define OUTOFFW(r, m) OUTW(r, INW(r) & ~(m))
#define OUTONL(r, m) OUTL(r, INL(r) | (m))
#define OUTOFFL(r, m) OUTL(r, INL(r) & ~(m))
/*==========================================================
**
** 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_NOTAGS (0x40)
#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.
**
**==========================================================
*/
#define PRINT_ADDR(xp) sc_print_addr(xp->sc_link)
/*==========================================================
**
** 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 {
ncrcmd l_cmd;
ncrcmd 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;
/*
** pointer to ccb used for negotiating.
** Avoid to start a nego for all queued commands
** when tagged command queuing is enabled.
*/
ccb_p nego_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_int32_t savep;
u_int32_t lastp;
u_int32_t 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 {
/*
** This filler ensures that the global header is
** cache line size aligned.
*/
ncrcmd filler[4];
/*
** 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.
*/
ncrcmd 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;
/*
** Physical address of this instance of ccb
*/
u_long p_ccb;
/*
** 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;
};
#define CCB_PHYS(cp,lbl) (cp->p_ccb + offsetof(struct ccb, lbl))
/*==========================================================
**
** Declaration of structs: NCR device descriptor
**
**==========================================================
*/
struct ncb {
/*
** The global header.
** Accessible to both the host and the
** script-processor.
** We assume it is cache line size aligned.
*/
struct head header;
#ifdef __NetBSD__
struct device sc_dev;
void *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;
vm_offset_t vaddr2;
vm_offset_t paddr2;
/*
** pointer to the chip's registers.
*/
volatile
struct ncr_reg* reg;
/*
** Scripts instance virtual address.
*/
struct script *script;
struct scripth *scripth;
/*
** Scripts instance physical address.
*/
u_long p_script;
u_long p_scripth;
/*
** The SCSI address of the host adapter.
*/
u_char myaddr;
/*
** timing parameters
*/
u_char minsync; /* Minimum sync period factor */
u_char maxsync; /* Maximum sync period factor */
u_char maxoffs; /* Max scsi offset */
u_char clock_divn; /* Number of clock divisors */
u_long clock_khz; /* SCSI clock frequency in KHz */
u_long features; /* Chip features map */
u_char multiplier; /* Clock multiplier (1,2,4) */
u_char maxburst; /* log base 2 of dwords burst */
/*
** BIOS supplied PCI bus options
*/
u_char rv_scntl3;
u_char rv_dcntl;
u_char rv_dmode;
u_char rv_ctest3;
u_char rv_ctest4;
u_char rv_ctest5;
u_char rv_gpcntl;
u_char rv_stest2;
/*-----------------------------------------------
** 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_int32_t squeue [MAX_START];
u_short squeueput;
u_short actccbs;
/*
** Timeout handler
*/
u_long heartbeat;
u_short ticks;
u_short latetime;
u_long lasttime;
struct callout_handle timeout_ch;
/*-----------------------------------------------
** 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 control block.
** It's used only during the configuration phase.
** A target control block will be created
** after the first successful transfer.
** It is allocated separately in order to insure
** cache line size alignment.
*/
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_int32_t 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
};
#define NCB_SCRIPT_PHYS(np,lbl) (np->p_script + offsetof (struct script, lbl))
#define NCB_SCRIPTH_PHYS(np,lbl) (np->p_scripth + offsetof (struct scripth,lbl))
/*==========================================================
**
**
** 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!
**
**----------------------------------------------------------
*/
/*
** Script fragments which are loaded into the on-board RAM
** of 825A, 875 and 895 chips.
*/
struct script {
ncrcmd start [ 7];
ncrcmd start0 [ 2];
ncrcmd start1 [ 3];
ncrcmd startpos [ 1];
ncrcmd trysel [ 8];
ncrcmd skip [ 8];
ncrcmd skip2 [ 3];
ncrcmd idle [ 2];
ncrcmd select [ 22];
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 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 badgetcc [ 6];
ncrcmd reselect [ 8];
ncrcmd reselect1 [ 8];
ncrcmd reselect2 [ 8];
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];
};
/*
** Script fragments which stay in main memory for all chips.
*/
struct scripth {
ncrcmd tryloop [MAX_START*5+2];
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 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 aborttag [ 4];
ncrcmd abort [ 22];
ncrcmd snooptest [ 9];
ncrcmd snoopend [ 2];
};
/*==========================================================
**
**
** Function headers.
**
**
**==========================================================
*/
#ifdef KERNEL
static void ncr_alloc_ccb (ncb_p np, u_long target, u_long lun);
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_selectclock (ncb_p np, u_char scntl3);
static void ncr_getclock (ncb_p np, u_char multiplier);
static ccb_p ncr_get_ccb (ncb_p np, u_long flags, u_long t,u_long l);
static u_int32_t ncr_info (int unit);
static void ncr_init (ncb_p np, char * msg, u_long code);
static void ncr_intr (void *vnp);
static void ncr_int_ma (ncb_p np, u_char dstat);
static void ncr_int_sir (ncb_p np);
static void ncr_int_sto (ncb_p np);
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, ncrcmd *src, ncrcmd *dst, int len);
static void ncr_script_fill (struct script * scr, struct scripth *scrh);
static int ncr_scatter (struct dsb* phys, vm_offset_t vaddr,
vm_size_t datalen);
static void ncr_setmaxtags (tcb_p tp, u_long usrtags);
static void ncr_getsync (ncb_p np, u_char sfac, u_char *fakp,
u_char *scntl3p);
static void ncr_setsync (ncb_p np, ccb_p cp,u_char scntl3,u_char sxfer);
static void ncr_settags (tcb_p tp, lcb_p lp, u_long usrtags);
static void ncr_setwide (ncb_p np, ccb_p cp, u_char wide, u_char ack);
static int ncr_show_msg (u_char * msg);
static int ncr_snooptest (ncb_p np);
static int32_t ncr_start (struct scsi_xfer *xp);
static void ncr_timeout (void *arg);
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 *, void *, 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 1.111 1997/09/21 22:02:16 gibbs Exp $\n";
static const u_long ncr_version = NCR_VERSION * 11
+ (u_long) sizeof (struct ncb) * 7
+ (u_long) sizeof (struct ccb) * 5
+ (u_long) sizeof (struct lcb) * 3
+ (u_long) sizeof (struct tcb) * 2;
#ifdef KERNEL
static const int nncr=MAX_UNITS; /* XXX to be replaced by SYSCTL */
ncb_p ncrp [MAX_UNITS]; /* XXX to be replaced by SYSCTL */
static int ncr_debug = SCSI_NCR_DEBUG;
SYSCTL_INT(_debug, OID_AUTO, ncr_debug, CTLFLAG_RW, &ncr_debug, 0, "");
static 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_820_ID (0x00021000ul)
#define NCR_825_ID (0x00031000ul)
#define NCR_860_ID (0x00061000ul)
#define NCR_875_ID (0x000f1000ul)
#define NCR_875_ID2 (0x008f1000ul)
#define NCR_885_ID (0x000d1000ul)
#define NCR_895_ID (0x000c1000ul)
#define NCR_896_ID (0x000b1000ul)
#ifdef __NetBSD__
struct cfdriver ncrcd = {
NULL, "ncr", ncr_probe, ncr_attach, DV_DISK, sizeof(struct ncb)
};
#else /* !__NetBSD__ */
static u_long ncr_count;
static struct pci_device ncr_device = {
"ncr",
ncr_probe,
ncr_attach,
&ncr_count,
NULL
};
DATA_SET (pcidevice_set, ncr_device);
#endif /* !__NetBSD__ */
static struct scsi_adapter ncr_switch =
{
ncr_start,
ncr_min_phys,
0,
0,
#ifndef __NetBSD__
ncr_info,
"ncr",
#endif /* !__NetBSD__ */
};
static 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 */
#ifndef __NetBSD__
"ncr",
#endif /* !__NetBSD__ */
};
#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_KVAR 0x70000000
#define RELOC_LABELH 0x80000000
#define RELOC_MASK 0xf0000000
#define NADDR(label) (RELOC_SOFTC | offsetof(struct ncb, label))
#define PADDR(label) (RELOC_LABEL | offsetof(struct script, label))
#define PADDRH(label) (RELOC_LABELH | offsetof(struct scripth, label))
#define RADDR(label) (RELOC_REGISTER | REG(label))
#define FADDR(label,ofs)(RELOC_REGISTER | ((REG(label))+(ofs)))
#define KVAR(which) (RELOC_KVAR | (which))
#define KVAR_TIME_TV_SEC (0)
#define KVAR_TIME (1)
#define KVAR_NCR_CACHE (2)
#define SCRIPT_KVAR_FIRST (0)
#define SCRIPT_KVAR_LAST (3)
/*
* Kernel variables referenced in the scripts.
* THESE MUST ALL BE ALIGNED TO A 4-BYTE BOUNDARY.
*/
static void *script_kvars[] =
{ &time.tv_sec, &time, &ncr_cache };
static struct script script0 = {
/*--------------------------< START >-----------------------*/ {
/*
** Claim to be still alive ...
*/
SCR_COPY (sizeof (((struct ncb *)0)->heartbeat)),
KVAR (KVAR_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 >--------------------*/,{
PADDRH(tryloop),
}/*-------------------------< 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_F (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),
#ifdef undef /* XXX better fail than try to deal with this ... */
SCR_JUMPR ^ IFTRUE (WHEN (SCR_MSG_OUT)),
-16,
#endif
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_F (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)),
KVAR (KVAR_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)),
PADDRH (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)),
KVAR (KVAR_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)),
KVAR (KVAR_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)),
PADDRH (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)),
PADDRH (msg_extended),
SCR_JUMP ^ IFTRUE (DATA (M_NOOP)),
PADDR (clrack),
SCR_JUMP ^ IFTRUE (DATA (M_REJECT)),
PADDRH (msg_reject),
SCR_JUMP ^ IFTRUE (DATA (M_IGN_RESIDUE)),
PADDRH (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),
}/*-------------------------< 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_F (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)),
PADDRH(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_F (1),
NADDR (header.savep),
PADDR (disconnect0),
}/*-------------------------< DISCONNECT0 >--------------*/,{
/*<<<*/ SCR_JUMPR ^ IFTRUE (DATA (1)),
20,
/*
** neither this
*/
SCR_COPY_F (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)),
KVAR (KVAR_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)),
PADDRH (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),
}/*------------------------< BADGETCC >---------------------*/,{
/*
** If SIGP was set, clear it and try again.
*/
SCR_FROM_REG (ctest2),
0,
SCR_JUMP ^ IFTRUE (MASK (CSIGP,CSIGP)),
PADDRH (getcc2),
SCR_INT,
SIR_SENSE_FAILED,
}/*-------------------------< RESELECT >--------------------*/,{
/*
** This NOP will be patched with LED OFF
** SCR_REG_REG (gpreg, SCR_OR, 0x01)
*/
SCR_NO_OP,
0,
/*
** 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),
}/*-------------------------< RESELECT1 >--------------------*/,{
/*
** This NOP will be patched with LED ON
** SCR_REG_REG (gpreg, SCR_AND, 0xfe)
*/
SCR_NO_OP,
0,
/*
** ... 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, 0x8F),
0,
SCR_TO_REG (ctest0),
0,
SCR_JUMP,
NADDR (jump_tcb),
}/*-------------------------< RESELECT2 >-------------------*/,{
/*
** This NOP will be patched with LED ON
** SCR_REG_REG (gpreg, SCR_AND, 0xfe)
*/
SCR_NO_OP,
0,
/*
** 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)),
** KVAR (KVAR_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_OUT)),
** PADDR (no_data),
** SCR_COPY (sizeof (struct timeval)),
** KVAR (KVAR_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
}/*--------------------------------------------------------*/
};
static struct scripth scripth0 = {
/*-------------------------< 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,
** PADDRH(tryloop),
**
**-----------------------------------------------------------
*/
0
}/*-------------------------< 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)),
PADDRH (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)),
PADDRH (msg_parity),
SCR_FROM_REG (scratcha),
0,
/*
*/
SCR_JUMP ^ IFTRUE (DATA (3)),
PADDRH (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)),
PADDRH (msg_parity),
SCR_FROM_REG (scratcha),
0,
SCR_JUMP ^ IFTRUE (DATA (M_X_WIDE_REQ)),
PADDRH (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)),
PADDRH (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)),
PADDRH (msg_parity),
SCR_FROM_REG (scratcha),
0,
SCR_JUMP ^ IFTRUE (DATA (M_X_SYNC_REQ)),
PADDRH (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)),
PADDRH (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),
}/*-------------------------< 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_F (4),
RADDR (dsa),
PADDRH (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)),
PADDRH(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),
}/*-------------------------< 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),
KVAR (KVAR_NCR_CACHE),
RADDR (scratcha),
/*
** Write the variable.
*/
SCR_COPY (4),
RADDR (temp),
KVAR (KVAR_NCR_CACHE),
/*
** Read back the variable.
*/
SCR_COPY (4),
KVAR (KVAR_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, struct scripth * scrh)
{
int i;
ncrcmd *p;
p = scrh->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++ =PADDRH(tryloop);
assert ((u_long)p == (u_long)&scrh->tryloop + sizeof (scrh->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) KVAR (KVAR_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) KVAR (KVAR_TIME);
*p++ =NADDR (header.stamp.data);
*p++ =SCR_MOVE_TBL ^ SCR_DATA_OUT;
*p++ =offsetof (struct dsb, data[ 0]);
for (i=1; i<MAX_SCATTER; i++) {
*p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT));
*p++ =PADDR (dispatch);
*p++ =SCR_MOVE_TBL ^ SCR_DATA_OUT;
*p++ =offsetof (struct dsb, data[i]);
};
*p++ =SCR_CALL;
*p++ =PADDR (dispatch);
*p++ =SCR_JUMP;
*p++ =PADDR (no_data);
assert ((u_long)p == (u_long)&scr->data_out + sizeof (scr->data_out));
}
/*==========================================================
**
**
** Copy and rebind a script.
**
**
**==========================================================
*/
static void ncr_script_copy_and_bind (ncb_p np, ncrcmd *src, ncrcmd *dst, int len)
{
ncrcmd opcode, new, old, tmp1, tmp2;
ncrcmd *start, *end;
int relocs;
start = src;
end = src + len/4;
while (src < end) {
*dst++ = opcode = *src++;
/*
** If we forget to change the length
** in struct script, a field will be
** padded with 0. This is an illegal
** command.
*/
if (opcode == 0) {
printf ("%s: ERROR0 IN SCRIPT at %d.\n",
ncr_name(np), (int) (src-start-1));
DELAY (1000000);
};
if (DEBUG_FLAGS & DEBUG_SCRIPT)
printf ("%p: <%x>\n",
(src-1), (unsigned)opcode);
/*
** We don't have to decode ALL commands
*/
switch (opcode >> 28) {
case 0xc:
/*
** COPY has TWO arguments.
*/
relocs = 2;
tmp1 = src[0];
if ((tmp1 & RELOC_MASK) == RELOC_KVAR)
tmp1 = 0;
tmp2 = src[1];
if ((tmp2 & RELOC_MASK) == RELOC_KVAR)
tmp2 = 0;
if ((tmp1 ^ tmp2) & 3) {
printf ("%s: ERROR1 IN SCRIPT at %d.\n",
ncr_name(np), (int) (src-start-1));
DELAY (1000000);
}
/*
** If PREFETCH feature not enabled, remove
** the NO FLUSH bit if present.
*/
if ((opcode & SCR_NO_FLUSH) && !(np->features&FE_PFEN))
dst[-1] = (opcode & ~SCR_NO_FLUSH);
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) + np->p_script;
break;
case RELOC_LABELH:
new = (old & ~RELOC_MASK) + np->p_scripth;
break;
case RELOC_SOFTC:
new = (old & ~RELOC_MASK) + vtophys(np);
break;
case RELOC_KVAR:
if (((old & ~RELOC_MASK) <
SCRIPT_KVAR_FIRST) ||
((old & ~RELOC_MASK) >
SCRIPT_KVAR_LAST))
panic("ncr KVAR out of range");
new = vtophys(script_kvars[old &
~RELOC_MASK]);
break;
case 0:
/* Don't relocate a 0 address. */
if (old == 0) {
new = old;
break;
}
/* fall through */
default:
panic("ncr_script_copy_and_bind: weird relocation %x @ %d\n", old, (src - start));
break;
}
*dst++ = new;
}
} else
*dst++ = *src++;
};
}
/*==========================================================
**
**
** Auto configuration.
**
**
**==========================================================
*/
/*----------------------------------------------------------
**
** Reduce the transfer length to the max value
** we can transfer safely.
**
** Reading a block greater then MAX_SIZE from the
** raw (character) device exercises a memory leak
** in the vm subsystem. This is common to ALL devices.
** We have submitted a description of this bug to
** <FreeBSD-bugs@freefall.cdrom.com>.
** It should be fixed in the current release.
**
**----------------------------------------------------------
*/
void ncr_min_phys (struct buf *bp)
{
if ((unsigned long)bp->b_bcount > MAX_SIZE) bp->b_bcount = MAX_SIZE;
}
/*----------------------------------------------------------
**
** Maximal number of outstanding requests per target.
**
**----------------------------------------------------------
*/
u_int32_t ncr_info (int unit)
{
return (1); /* may be changed later */
}
/*----------------------------------------------------------
**
** NCR chip devices table and chip look up function.
** Features bit are defined in ncrreg.h. Is it the
** right place?
**
**----------------------------------------------------------
*/
typedef struct {
unsigned long device_id;
unsigned short minrevid;
char *name;
unsigned char maxburst;
unsigned char maxoffs;
unsigned char clock_divn;
unsigned int features;
} ncr_chip;
static ncr_chip ncr_chip_table[] = {
{NCR_810_ID, 0x00, "ncr 53c810 fast10 scsi", 4, 8, 4,
FE_ERL}
,
{NCR_810_ID, 0x10, "ncr 53c810a fast10 scsi", 4, 8, 4,
FE_ERL|FE_LDSTR|FE_PFEN|FE_BOF}
,
{NCR_815_ID, 0x00, "ncr 53c815 fast10 scsi", 4, 8, 4,
FE_ERL|FE_BOF}
,
{NCR_820_ID, 0x00, "ncr 53c820 fast10 wide scsi", 4, 8, 4,
FE_WIDE|FE_ERL}
,
{NCR_825_ID, 0x00, "ncr 53c825 fast10 wide scsi", 4, 8, 4,
FE_WIDE|FE_ERL|FE_BOF}
,
{NCR_825_ID, 0x10, "ncr 53c825a fast10 wide scsi", 7, 8, 4,
FE_WIDE|FE_CACHE_SET|FE_DFS|FE_LDSTR|FE_PFEN|FE_RAM}
,
{NCR_860_ID, 0x00, "ncr 53c860 fast20 scsi", 4, 8, 5,
FE_ULTRA|FE_CLK80|FE_CACHE_SET|FE_LDSTR|FE_PFEN}
,
{NCR_875_ID, 0x00, "ncr 53c875 fast20 wide scsi", 7, 16, 5,
FE_WIDE|FE_ULTRA|FE_CLK80|FE_CACHE_SET|FE_DFS|FE_LDSTR|FE_PFEN|FE_RAM}
,
{NCR_875_ID, 0x02, "ncr 53c875 fast20 wide scsi", 7, 16, 5,
FE_WIDE|FE_ULTRA|FE_DBLR|FE_CACHE_SET|FE_DFS|FE_LDSTR|FE_PFEN|FE_RAM}
,
{NCR_875_ID2, 0x00, "ncr 53c875j fast20 wide scsi", 7, 16, 5,
FE_WIDE|FE_ULTRA|FE_DBLR|FE_CACHE_SET|FE_DFS|FE_LDSTR|FE_PFEN|FE_RAM}
,
{NCR_885_ID, 0x00, "ncr 53c885 fast20 wide scsi", 7, 16, 5,
FE_WIDE|FE_ULTRA|FE_DBLR|FE_CACHE_SET|FE_DFS|FE_LDSTR|FE_PFEN|FE_RAM}
,
{NCR_895_ID, 0x00, "ncr 53c895 fast40 wide scsi", 7, 31, 7,
FE_WIDE|FE_ULTRA2|FE_QUAD|FE_CACHE_SET|FE_DFS|FE_LDSTR|FE_PFEN|FE_RAM}
,
{NCR_896_ID, 0x00, "ncr 53c896 fast40 wide scsi", 7, 31, 7,
FE_WIDE|FE_ULTRA2|FE_QUAD|FE_CACHE_SET|FE_DFS|FE_LDSTR|FE_PFEN|FE_RAM}
};
static int ncr_chip_lookup(u_long device_id, u_char revision_id)
{
int i, found;
found = -1;
for (i = 0; i < sizeof(ncr_chip_table)/sizeof(ncr_chip_table[0]); i++) {
if (device_id == ncr_chip_table[i].device_id &&
ncr_chip_table[i].minrevid <= revision_id) {
if (found < 0 ||
ncr_chip_table[found].minrevid
< ncr_chip_table[i].minrevid) {
found = i;
}
}
}
return found;
}
/*----------------------------------------------------------
**
** Probe the hostadapter.
**
**----------------------------------------------------------
*/
#ifdef __NetBSD__
int
ncr_probe(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct cfdata *cf = match;
struct pci_attach_args *pa = aux;
#if 0
if (!pci_targmatch(cf, pa))
return 0;
#endif
if (ncr_chip_lookup(pa->pa_id, 0xff) < 0)
return 0;
return 1;
}
#else /* !__NetBSD__ */
static char* ncr_probe (pcici_t tag, pcidi_t type)
{
u_char rev = pci_conf_read (tag, PCI_CLASS_REG) & 0xff;
int i;
i = ncr_chip_lookup(type, rev);
if (i >= 0)
return ncr_chip_table[i].name;
return (NULL);
}
#endif /* !__NetBSD__ */
/*==========================================================
**
** NCR chip clock divisor table.
** Divisors are multiplied by 10,000,000 in order to make
** calculations more simple.
**
**==========================================================
*/
#define _5M 5000000
static u_long div_10M[] =
{2*_5M, 3*_5M, 4*_5M, 6*_5M, 8*_5M, 12*_5M, 16*_5M};
/*===============================================================
**
** NCR chips allow burst lengths of 2, 4, 8, 16, 32, 64, 128
** transfers. 32,64,128 are only supported by 875 and 895 chips.
** We use log base 2 (burst length) as internal code, with
** value 0 meaning "burst disabled".
**
**===============================================================
*/
/*
* Burst length from burst code.
*/
#define burst_length(bc) (!(bc))? 0 : 1 << (bc)
/*
* Burst code from io register bits.
*/
#define burst_code(dmode, ctest4, ctest5) \
(ctest4) & 0x80? 0 : (((dmode) & 0xc0) >> 6) + ((ctest5) & 0x04) + 1
/*
* Set initial io register bits from burst code.
*/
static void ncr_init_burst(ncb_p np, u_char bc)
{
np->rv_ctest4 &= ~0x80;
np->rv_dmode &= ~(0x3 << 6);
np->rv_ctest5 &= ~0x4;
if (!bc) {
np->rv_ctest4 |= 0x80;
}
else {
--bc;
np->rv_dmode |= ((bc & 0x3) << 6);
np->rv_ctest5 |= (bc & 0x4);
}
}
/*==========================================================
**
**
** Auto configuration: attach and init a host adapter.
**
**
**==========================================================
*/
#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;
u_char rev = 0;
u_long period;
int i;
ncr_chip *chip;
/*
** 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 = pci_map_int(pa->pa_tag, PCI_IPL_BIO, ncr_intr, np);
if (np->sc_ih == NULL)
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
u_char rev = 0;
u_long period;
int i;
/*
** allocate and initialize structures.
*/
if (!np) {
np = (ncb_p) malloc (sizeof (struct ncb), M_DEVBUF, M_WAITOK);
if (!np) return;
ncrp[unit]=np;
}
bzero (np, sizeof (*np));
np->ccb = (ccb_p) malloc (sizeof (struct ccb), M_DEVBUF, M_WAITOK);
if (!np->ccb) return;
bzero (np->ccb, sizeof (*np->ccb));
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;
/*
** 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;
#ifdef NCR_IOMAPPED
/*
** Try to map the controller chip into iospace.
*/
if (!pci_map_port (config_id, 0x10, &np->port))
return;
#endif
#endif /* !__NetBSD__ */
/*
** Save some controller register default values
*/
np->rv_scntl3 = INB(nc_scntl3) & 0x77;
np->rv_dmode = INB(nc_dmode) & 0xce;
np->rv_dcntl = INB(nc_dcntl) & 0xa9;
np->rv_ctest3 = INB(nc_ctest3) & 0x01;
np->rv_ctest4 = INB(nc_ctest4) & 0x88;
np->rv_ctest5 = INB(nc_ctest5) & 0x24;
np->rv_gpcntl = INB(nc_gpcntl);
np->rv_stest2 = INB(nc_stest2) & 0x20;
if (bootverbose >= 2) {
printf ("\tBIOS values: SCNTL3:%02x DMODE:%02x DCNTL:%02x\n",
np->rv_scntl3, np->rv_dmode, np->rv_dcntl);
printf ("\t CTEST3:%02x CTEST4:%02x CTEST5:%02x\n",
np->rv_ctest3, np->rv_ctest4, np->rv_ctest5);
}
np->rv_dcntl |= NOCOM;
/*
** Do chip dependent initialization.
*/
#ifndef __NetBSD__
rev = pci_conf_read (config_id, PCI_CLASS_REG) & 0xff;
#endif /* !__NetBSD__ */
/*
** Get chip features from chips table.
*/
#ifdef __NetBSD__
i = ncr_chip_lookup(pa->pa_id, rev);
#else /* !__NetBSD__ */
i = ncr_chip_lookup(pci_conf_read(config_id, PCI_ID_REG), rev);
#endif /* __NetBSD__ */
if (i >= 0) {
np->maxburst = ncr_chip_table[i].maxburst;
np->maxoffs = ncr_chip_table[i].maxoffs;
np->clock_divn = ncr_chip_table[i].clock_divn;
np->features = ncr_chip_table[i].features;
} else { /* Should'nt happen if probe() is ok */
np->maxburst = 4;
np->maxoffs = 8;
np->clock_divn = 4;
np->features = FE_ERL;
}
np->maxwide = np->features & FE_WIDE ? 1 : 0;
np->clock_khz = np->features & FE_CLK80 ? 80000 : 40000;
if (np->features & FE_QUAD) np->multiplier = 4;
else if (np->features & FE_DBLR) np->multiplier = 2;
else np->multiplier = 1;
/*
** Get the frequency of the chip's clock.
** Find the right value for scntl3.
*/
if (np->features & (FE_ULTRA|FE_ULTRA2))
ncr_getclock(np, np->multiplier);
#ifdef NCR_TEKRAM_EEPROM
if (bootverbose) {
printf ("%s: Tekram EEPROM read %s\n",
ncr_name(np),
read_tekram_eeprom (np, NULL) ?
"succeeded" : "failed");
}
#endif /* NCR_TEKRAM_EEPROM */
/*
* If scntl3 != 0, we assume BIOS is present.
*/
if (np->rv_scntl3)
np->features |= FE_BIOS;
/*
* Divisor to be used for async (timer pre-scaler).
*/
i = np->clock_divn - 1;
while (i >= 0) {
--i;
if (10ul * SCSI_NCR_MIN_ASYNC * np->clock_khz > div_10M[i]) {
++i;
break;
}
}
np->rv_scntl3 = i+1;
/*
* Minimum synchronous period factor supported by the chip.
* Btw, 'period' is in tenths of nanoseconds.
*/
period = (4 * div_10M[0] + np->clock_khz - 1) / np->clock_khz;
if (period <= 250) np->minsync = 10;
else if (period <= 303) np->minsync = 11;
else if (period <= 500) np->minsync = 12;
else np->minsync = (period + 40 - 1) / 40;
/*
* Check against chip SCSI standard support (SCSI-2,ULTRA,ULTRA2).
*/
if (np->minsync < 25 && !(np->features & (FE_ULTRA|FE_ULTRA2)))
np->minsync = 25;
else if (np->minsync < 12 && !(np->features & FE_ULTRA2))
np->minsync = 12;
/*
* Maximum synchronous period factor supported by the chip.
*/
period = (11 * div_10M[np->clock_divn - 1]) / (4 * np->clock_khz);
np->maxsync = period > 2540 ? 254 : period / 10;
/*
* Now, some features available with Symbios compatible boards.
* LED support through GPIO0 and DIFF support.
*/
#ifdef SCSI_NCR_SYMBIOS_COMPAT
if (!(np->rv_gpcntl & 0x01))
np->features |= FE_LED0;
#if 0 /* Not safe enough without NVRAM support or user settable option */
if (!(INB(nc_gpreg) & 0x08))
np->features |= FE_DIFF;
#endif
#endif /* SCSI_NCR_SYMBIOS_COMPAT */
/*
* Prepare initial IO registers settings.
* Trust BIOS only if we believe we have one and if we want to.
*/
#ifdef SCSI_NCR_TRUST_BIOS
if (!(np->features & FE_BIOS)) {
#else
if (1) {
#endif
np->rv_dmode = 0;
np->rv_dcntl = NOCOM;
np->rv_ctest3 = 0;
np->rv_ctest4 = MPEE;
np->rv_ctest5 = 0;
np->rv_stest2 = 0;
if (np->features & FE_ERL)
np->rv_dmode |= ERL; /* Enable Read Line */
if (np->features & FE_BOF)
np->rv_dmode |= BOF; /* Burst Opcode Fetch */
if (np->features & FE_ERMP)
np->rv_dmode |= ERMP; /* Enable Read Multiple */
if (np->features & FE_CLSE)
np->rv_dcntl |= CLSE; /* Cache Line Size Enable */
if (np->features & FE_WRIE)
np->rv_ctest3 |= WRIE; /* Write and Invalidate */
if (np->features & FE_PFEN)
np->rv_dcntl |= PFEN; /* Prefetch Enable */
if (np->features & FE_DFS)
np->rv_ctest5 |= DFS; /* Dma Fifo Size */
if (np->features & FE_DIFF)
np->rv_stest2 |= 0x20; /* Differential mode */
ncr_init_burst(np, np->maxburst); /* Max dwords burst length */
} else {
np->maxburst =
burst_code(np->rv_dmode, np->rv_ctest4, np->rv_ctest5);
}
#ifndef NCR_IOMAPPED
/*
** Get on-chip SRAM address, if supported
*/
if ((np->features & FE_RAM) && sizeof(struct script) <= 4096)
#ifdef __NetBSD__
(void)pci_map_mem(pa->pa_tag, 0x18, &np->vaddr2, &np->paddr2));
#else /* !__NetBSD__ */
(void)(!pci_map_mem (config_id,0x18, &np->vaddr2, &np->paddr2));
#endif /* __NetBSD */
#endif /* !NCR_IOMAPPED */
/*
** Allocate structure for script relocation.
*/
if (np->vaddr2 != NULL) {
np->script = (struct script *) np->vaddr2;
np->p_script = np->paddr2;
#ifdef __FreeBSD__
} else if (sizeof (struct script) > PAGE_SIZE) {
np->script = (struct script*) vm_page_alloc_contig
(round_page(sizeof (struct script)),
0x100000, 0xffffffff, PAGE_SIZE);
#endif /* __FreeBSD__ */
} else {
np->script = (struct script *)
malloc (sizeof (struct script), M_DEVBUF, M_WAITOK);
}
#ifdef __FreeBSD__
if (sizeof (struct scripth) > PAGE_SIZE) {
np->scripth = (struct scripth*) vm_page_alloc_contig
(round_page(sizeof (struct scripth)),
0x100000, 0xffffffff, PAGE_SIZE);
} else
#endif /* __FreeBSD__ */
{
np->scripth = (struct scripth *)
malloc (sizeof (struct scripth), M_DEVBUF, M_WAITOK);
}
#ifdef SCSI_NCR_PCI_CONFIG_FIXUP
/*
** If cache line size is enabled, check PCI config space and
** try to fix it up if necessary.
*/
#ifdef PCIR_CACHELNSZ /* To be sure that new PCI stuff is present */
{
u_char cachelnsz = pci_cfgread(config_id, PCIR_CACHELNSZ, 1);
u_short command = pci_cfgread(config_id, PCIR_COMMAND, 2);
if (!cachelnsz) {
cachelnsz = 8;
printf("%s: setting PCI cache line size register to %d.\n",
ncr_name(np), (int)cachelnsz);
pci_cfgwrite(config_id, PCIR_CACHELNSZ, cachelnsz, 1);
}
if (!(command & (1<<4))) {
command |= (1<<4);
printf("%s: setting PCI command write and invalidate.\n",
ncr_name(np));
pci_cfgwrite(config_id, PCIR_COMMAND, command, 2);
}
}
#endif /* PCIR_CACHELNSZ */
#endif /* SCSI_NCR_PCI_CONFIG_FIXUP */
/*
** Bells and whistles ;-)
*/
if (bootverbose)
printf("%s: minsync=%d, maxsync=%d, maxoffs=%d, %d dwords burst, %s dma fifo\n",
ncr_name(np), np->minsync, np->maxsync, np->maxoffs,
burst_length(np->maxburst),
(np->rv_ctest5 & DFS) ? "large" : "normal");
/*
** Print some complementary information that can be helpfull.
*/
if (bootverbose)
printf("%s: %s, %s IRQ driver%s\n",
ncr_name(np),
np->rv_stest2 & 0x20 ? "differential" : "single-ended",
np->rv_dcntl & IRQM ? "totem pole" : "open drain",
np->vaddr2 ? ", using on-chip SRAM" : "");
/*
** Patch scripts to physical addresses
*/
ncr_script_fill (&script0, &scripth0);
np->p_script = vtophys(np->script);
np->p_scripth = vtophys(np->scripth);
ncr_script_copy_and_bind (np, (ncrcmd *) &script0,
(ncrcmd *) np->script, sizeof(struct script));
ncr_script_copy_and_bind (np, (ncrcmd *) &scripth0,
(ncrcmd *) np->scripth, sizeof(struct scripth));
np->ccb->p_ccb = vtophys (np->ccb);
/*
** Patch the script for LED support.
*/
if (np->features & FE_LED0) {
np->script->reselect[0] = SCR_REG_REG(gpreg, SCR_OR, 0x01);
np->script->reselect1[0] = SCR_REG_REG(gpreg, SCR_AND, 0xfe);
np->script->reselect2[0] = SCR_REG_REG(gpreg, SCR_AND, 0xfe);
}
/*
** init data structure
*/
np->jump_tcb.l_cmd = SCR_JUMP;
np->jump_tcb.l_paddr = NCB_SCRIPTH_PHYS (np, abort);
/*
** Get SCSI addr of host adapter (set by bios?).
*/
np->myaddr = INB(nc_scid) & 0x07;
if (!np->myaddr) np->myaddr = SCSI_NCR_MYADDR;
#ifdef NCR_DUMP_REG
/*
** Log the initial register contents
*/
{
int reg;
#ifdef __NetBSD__
u_long config_id = pa->pa_tag;
#endif /* __NetBSD__ */
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");
}
}
#endif /* NCR_DUMP_REG */
/*
** Reset chip.
*/
OUTB (nc_istat, SRST);
DELAY (1000);
OUTB (nc_istat, 0 );
/*
** 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 /* __NetBSD__ */
/*
** After SCSI devices have been opened, we cannot
** reset the bus safely, so we do it here.
** Interrupt handler does the real work.
*/
OUTB (nc_scntl1, CRST);
DELAY (1000);
/*
** Process the reset exception,
** if interrupts are not enabled yet.
** Then enable disconnects.
*/
ncr_exception (np);
np->disc = 1;
/*
** Now let the generic SCSI driver
** look for the SCSI devices on the bus ..
*/
#ifdef __NetBSD__
np->sc_link.adapter_softc = np;
np->sc_link.adapter_target = np->myaddr;
np->sc_link.openings = 1;
#else /* !__NetBSD__ */
np->sc_link.adapter_unit = unit;
np->sc_link.adapter_softc = np;
np->sc_link.adapter_targ = np->myaddr;
np->sc_link.fordriver = 0;
#endif /* !__NetBSD__ */
np->sc_link.adapter = &ncr_switch;
np->sc_link.device = &ncr_dev;
np->sc_link.flags = 0;
#ifdef __NetBSD__
config_found(self, &np->sc_link, ncr_print);
#else /* !__NetBSD__ */
#if (__FreeBSD__ >= 2)
scbus = scsi_alloc_bus();
if(!scbus)
return;
scbus->adapter_link = &np->sc_link;
if(np->maxwide)
scbus->maxtarg = 15;
if (bootverbose) {
unsigned t_from = 0;
unsigned t_to = scbus->maxtarg;
unsigned myaddr = np->myaddr;
char *txt_and = "";
printf ("%s scanning for targets ", ncr_name (np));
if (t_from < myaddr) {
printf ("%d..%d ", t_from, myaddr -1);
txt_and = "and ";
}
if (myaddr < t_to)
printf ("%s%d..%d ", txt_and, myaddr +1, t_to);
printf ("(V%d " NCR_DATE ")\n", NCR_VERSION);
}
scsi_attachdevs (scbus);
scbus = NULL; /* Upper-level SCSI code owns this now */
#else
scsi_attachdevs (&np->sc_link);
#endif /* !__FreeBSD__ >= 2 */
#endif /* !__NetBSD__ */
/*
** start the timeout daemon
*/
ncr_timeout (np);
np->lasttime=0;
/*
** use SIMPLE TAG messages by default
*/
np->order = M_SIMPLE_TAG;
/*
** Done.
*/
return;
}
/*==========================================================
**
**
** Process pending device interrupts.
**
**
**==========================================================
*/
static void
ncr_intr(vnp)
void *vnp;
{
ncb_p np = vnp;
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));
np->ticks = 100;
};
if (DEBUG_FLAGS & DEBUG_TINY) printf ("]\n");
splx (oldspl);
}
/*==========================================================
**
**
** Start execution of a SCSI command.
** This is called from the generic SCSI driver.
**
**
**==========================================================
*/
static int32_t ncr_start (struct scsi_xfer * xp)
{
ncb_p np = (ncb_p) xp->sc_link->adapter_softc;
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 qidx, nego, idmsg, *msgptr;
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(COMPLETE);
};
/*---------------------------------------------
**
** 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(COMPLETE);
};
};
if ((unsigned)xp->datalen > 128*1024*1024) {
PRINT_ADDR(xp);
printf ("trying to transfer %8x bytes, mem addr = %8x\n",
xp->datalen, xp->data);
{
int j;
PRINT_ADDR(xp);
printf ("command: %2x (", cmd->opcode);
for (j = 0; j<11; j++)
printf (" %2x", cmd->bytes[j]);
printf (")\n");
}
}
if (DEBUG_FLAGS & DEBUG_TINY) {
PRINT_ADDR(xp);
printf ("CMD=%x F=%x A=%x L=%x ",
cmd->opcode, (unsigned)xp->flags,
(unsigned) xp->data, (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));
gettime(&cp->phys.header.stamp.start);
/*----------------------------------------------------
**
** Get device quirks from a speciality table.
**
**----------------------------------------------------
*/
if (tp->quirks & QUIRK_UPDATE) {
int q = xp->sc_link->quirks;
tp->quirks = QUIRK_NOMSG;
if (q & SD_Q_NO_TAGS)
tp->quirks |= QUIRK_NOTAGS;
if (q & SD_Q_NO_SYNC)
tp->quirks |= QUIRK_NOSYNC;
if (q & SD_Q_NO_WIDE)
tp->quirks |= QUIRK_NOWIDE16;
if (bootverbose && tp->quirks) {
PRINT_ADDR(xp);
printf ("NCR quirks=0x%x\n", tp->quirks);
};
/*
** set number of tags
*/
ncr_setmaxtags (tp, tp->usrtags);
};
/*---------------------------------------------------
**
** negotiation required?
**
**----------------------------------------------------
*/
nego = 0;
if (!tp->nego_cp && tp->inqdata[7]) {
/*
** negotiate wide transfers ?
*/
if (!tp->widedone) {
if (tp->inqdata[7] & INQ7_WIDE16) {
nego = NS_WIDE;
} else
tp->widedone=1;
};
/*
** negotiate synchronous transfers?
*/
if (!nego && !tp->period) {
if (SCSI_NCR_DFLT_SYNC
#if defined (CDROM_ASYNC)
&& ((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");
};
};
/*
** remember nego is pending for the target.
** Avoid to start a nego for all queued commands
** when tagged command queuing is enabled.
*/
if (nego)
tp->nego_cp = cp;
};
/*---------------------------------------------------
**
** 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;
if ((cp!=np->ccb) && (np->disc))
idmsg |= 0x40;
msgptr = cp->scsi_smsg;
msglen = 0;
msgptr[msglen++] = idmsg;
if (cp->tag) {
char tag;
tag = np->order;
if (tag == 0) {
/*
** Ordered write ops, unordered read ops.
*/
switch (cmd->opcode) {
case 0x08: /* READ_SMALL (6) */
case 0x28: /* READ_BIG (10) */
case 0xa8: /* READ_HUGE (12) */
tag = M_SIMPLE_TAG;
break;
default:
tag = M_ORDERED_TAG;
}
}
msgptr[msglen++] = tag;
msgptr[msglen++] = cp -> tag;
}
switch (nego) {
case NS_SYNC:
msgptr[msglen++] = M_EXTENDED;
msgptr[msglen++] = 3;
msgptr[msglen++] = M_X_SYNC_REQ;
msgptr[msglen++] = tp->minsync;
msgptr[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:
msgptr[msglen++] = M_EXTENDED;
msgptr[msglen++] = 2;
msgptr[msglen++] = M_X_WIDE_REQ;
msgptr[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(COMPLETE);
};
/*----------------------------------------------------
**
** Set the SAVED_POINTER.
**
**----------------------------------------------------
*/
if (flags & SCSI_DATA_IN) {
cp->phys.header.savep = NCB_SCRIPT_PHYS (np, data_in);
cp->phys.header.goalp = cp->phys.header.savep +20 +segments*16;
} else if (flags & SCSI_DATA_OUT) {
cp->phys.header.savep = NCB_SCRIPT_PHYS (np, data_out);
cp->phys.header.goalp = cp->phys.header.savep +20 +segments*16;
} else {
cp->phys.header.savep = NCB_SCRIPT_PHYS (np, 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 = NCB_SCRIPT_PHYS (np, 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 = CCB_PHYS (cp, scsi_smsg);
cp->phys.smsg.size = msglen;
cp->phys.smsg2.addr = CCB_PHYS (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 = CCB_PHYS (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.
*/
qidx = np->squeueput + 1;
if (qidx >= MAX_START) qidx=0;
np->squeue [qidx ] = NCB_SCRIPT_PHYS (np, idle);
np->squeue [np->squeueput] = CCB_PHYS (cp, phys);
np->squeueput = qidx;
if(DEBUG_FLAGS & DEBUG_QUEUE)
printf ("%s: queuepos=%d tryoffset=%d.\n", ncr_name (np),
np->squeueput,
(unsigned)(np->script->startpos[0]-
(NCB_SCRIPTH_PHYS (np, 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.
*/
#ifdef __NetBSD__
if (!(flags & SCSI_POLL)) {
#else /* !__NetBSD__ */
if (!(flags & SCSI_NOMASK)) {
#endif /* __NetBSD__ */
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);
};
#ifdef __NetBSD__
if (!(flags & SCSI_POLL))
#else /* !__NetBSD__ */
if (!(flags & SCSI_NOMASK))
#endif /* __NetBSD__ */
return (SUCCESSFULLY_QUEUED);
switch (xp->error) {
case 0 : return (COMPLETE);
case XS_BUSY: return (TRY_AGAIN_LATER);
};
return (COMPLETE);
}
/*==========================================================
**
**
** 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= NCB_SCRIPT_PHYS (np, 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];
/*
** We donnot queue more than 1 ccb per target
** with negotiation at any time. If this ccb was
** used for negotiation, clear this info in the tcb.
*/
if (cp == tp->nego_cp)
tp->nego_cp = 0;
/*
** 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.
*/
#ifdef __NetBSD__
if (xp->error != XS_NOERROR) {
/*
** Don't override the error value.
*/
} else
#endif /* __NetBSD__ */
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->sc_link->target, xp->sc_link->lun);
/*
** On inquire cmd (0x12) save some data.
*/
if (xp->cmd->opcode == 0x12 && xp->sc_link->lun == 0) {
bcopy ( xp->data,
&tp->inqdata,
sizeof (tp->inqdata));
/*
** 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) {
if (lp->reqlink != lp->actlink)
ncr_opennings (np, lp, xp);
};
tp->bytes += xp->datalen;
tp->transfers ++;
#ifndef __NetBSD__
} else if (xp->flags & SCSI_ERR_OK) {
/*
** Not correct, but errors expected.
*/
xp->resid = 0;
#endif /* !__NetBSD__ */
} 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)
|| (cp->scsi_status == S_CONFLICT))) {
/*
** Target is busy, or reservation conflict
*/
xp->error = XS_BUSY;
} else if (cp->host_status == HS_SEL_TIMEOUT) {
/*
** Device failed selection
*/
xp->error = XS_SELTIMEOUT;
} else if(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;
/*
** Reset chip.
*/
OUTB (nc_istat, SRST);
DELAY (1000);
OUTB (nc_istat, 0);
/*
** 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] = NCB_SCRIPT_PHYS (np, idle);
/*
** Start at first entry.
*/
np->squeueput = 0;
np->script->startpos[0] = NCB_SCRIPTH_PHYS (np, tryloop);
np->script->start0 [0] = SCR_INT ^ IFFALSE (0);
/*
** Wakeup all pending jobs.
*/
ncr_wakeup (np, code);
/*
** Init chip.
*/
OUTB (nc_istat, 0x00 ); /* Remove Reset, abort ... */
OUTB (nc_scntl0, 0xca ); /* full arb., ena parity, par->ATN */
OUTB (nc_scntl1, 0x00 ); /* odd parity, and remove CRST!! */
ncr_selectclock(np, np->rv_scntl3); /* Select SCSI clock */
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 , np->rv_dmode); /* XXX modify burstlen ??? */
OUTB (nc_dcntl , np->rv_dcntl);
OUTB (nc_ctest3, np->rv_ctest3);
OUTB (nc_ctest5, np->rv_ctest5);
OUTB (nc_ctest4, np->rv_ctest4);/* enable master parity checking */
OUTB (nc_stest2, np->rv_stest2|EXT); /* Extended Sreq/Sack filtering */
OUTB (nc_stest3, TE ); /* TolerANT enable */
OUTB (nc_stime0, 0x0b ); /* HTH = disabled, STO = 0.1 sec. */
if (bootverbose >= 2) {
printf ("\tACTUAL values:SCNTL3:%02x DMODE:%02x DCNTL:%02x\n",
np->rv_scntl3, np->rv_dmode, np->rv_dcntl);
printf ("\t CTEST3:%02x CTEST4:%02x CTEST5:%02x\n",
np->rv_ctest3, np->rv_ctest4, np->rv_ctest5);
}
/*
** Enable GPIO0 pin for writing if LED support.
*/
if (np->features & FE_LED0) {
OUTOFFB (nc_gpcntl, 0x01);
}
/*
** Reinitialize usrsync.
** Have to renegotiate synch mode.
*/
usrsync = 255;
if (SCSI_NCR_DFLT_SYNC) {
usrsync = SCSI_NCR_DFLT_SYNC;
if (usrsync > np->maxsync)
usrsync = np->maxsync;
if (usrsync < np->minsync)
usrsync = np->minsync;
};
/*
** 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, NCB_SCRIPT_PHYS (np, 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 not scsi 2
** don't believe FAST!
*/
if ((minsync < 50) && (tp->inqdata[2] & 0x0f) < 2)
minsync=50;
/*
** our limit ..
*/
if (minsync < np->minsync)
minsync = np->minsync;
/*
** divider limit
*/
if (minsync > np->maxsync)
minsync = 255;
tp->minsync = minsync;
tp->maxoffs = (minsync<255 ? np->maxoffs : 0);
/*
** period=0: has to negotiate sync transfer
*/
tp->period=0;
/*
** widedone=0: has to negotiate wide transfer
*/
tp->widedone=0;
}
/*==========================================================
**
** Get clock factor and sync divisor for a given
** synchronous factor period.
** Returns the clock factor (in sxfer) and scntl3
** synchronous divisor field.
**
**==========================================================
*/
static void ncr_getsync(ncb_p np, u_char sfac, u_char *fakp, u_char *scntl3p)
{
u_long clk = np->clock_khz; /* SCSI clock frequency in kHz */
int div = np->clock_divn; /* Number of divisors supported */
u_long fak; /* Sync factor in sxfer */
u_long per; /* Period in tenths of ns */
u_long kpc; /* (per * clk) */
/*
** Compute the synchronous period in tenths of nano-seconds
*/
if (sfac <= 10) per = 250;
else if (sfac == 11) per = 303;
else if (sfac == 12) per = 500;
else per = 40 * sfac;
/*
** Look for the greatest clock divisor that allows an
** input speed faster than the period.
*/
kpc = per * clk;
while (--div >= 0)
if (kpc >= (div_10M[div] * 4)) break;
/*
** Calculate the lowest clock factor that allows an output
** speed not faster than the period.
*/
fak = (kpc - 1) / div_10M[div] + 1;
#if 0 /* You can #if 1 if you think this optimization is usefull */
per = (fak * div_10M[div]) / clk;
/*
** Why not to try the immediate lower divisor and to choose
** the one that allows the fastest output speed ?
** We dont want input speed too much greater than output speed.
*/
if (div >= 1 && fak < 6) {
u_long fak2, per2;
fak2 = (kpc - 1) / div_10M[div-1] + 1;
per2 = (fak2 * div_10M[div-1]) / clk;
if (per2 < per && fak2 <= 6) {
fak = fak2;
per = per2;
--div;
}
}
#endif
if (fak < 4) fak = 4; /* Should never happen, too bad ... */
/*
** Compute and return sync parameters for the ncr
*/
*fakp = fak - 4;
*scntl3p = ((div+1) << 4) + (sfac < 25 ? 0x80 : 0);
}
/*==========================================================
**
** Switch sync mode for current job and it's target
**
**==========================================================
*/
static void ncr_setsync (ncb_p np, ccb_p cp, u_char scntl3, u_char sxfer)
{
struct scsi_xfer *xp;
tcb_p tp;
int div;
u_char target = INB (nc_ctest0) & 0x0f;
assert (cp);
if (!cp) return;
xp = cp->xfer;
assert (xp);
if (!xp) return;
assert (target == (xp->sc_link->target & 0x0f));
tp = &np->target[target];
if (!scntl3 || !(sxfer & 0x1f))
scntl3 = np->rv_scntl3;
scntl3 = (scntl3 & 0xf0) | (tp->wval & EWS) | (np->rv_scntl3 & 0x07);
/*
** Deduce the value of controller sync period from scntl3.
** period is in tenths of nano-seconds.
*/
div = ((scntl3 >> 4) & 0x7);
if ((sxfer & 0x1f) && div)
tp->period = (((sxfer>>5)+4)*div_10M[div-1])/np->clock_khz;
else
tp->period = 0xffff;
/*
** Stop there if sync parameters are unchanged
*/
if (tp->sval == sxfer && tp->wval == scntl3) return;
tp->sval = sxfer;
tp->wval = scntl3;
/*
** Bells and whistles ;-)
*/
PRINT_ADDR(xp);
if (sxfer & 0x1f) {
unsigned f10 = 100000 << (tp->widedone ? tp->widedone -1 : 0);
unsigned mb10 = (f10 + tp->period/2) / tp->period;
/*
** Disable extended Sreq/Sack filtering
*/
if (tp->period <= 2000) OUTOFFB (nc_stest2, EXT);
printf ("%d.%d MB/s (%d ns, offset %d)\n",
mb10 / 10, mb10 % 10, tp->period / 10, sxfer & 0x1f);
} else printf ("asynchronous.\n");
/*
** set actual value and sync_status
*/
OUTB (nc_sxfer, sxfer);
np->sync_st = sxfer;
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->sync_status = sxfer;
cp->wide_status = scntl3;
};
}
/*==========================================================
**
** Switch wide mode for current job and it's target
** SCSI specs say: a SCSI device that accepts a WDTR
** message shall reset the synchronous agreement to
** asynchronous mode.
**
**==========================================================
*/
static void ncr_setwide (ncb_p np, ccb_p cp, u_char wide, u_char ack)
{
struct scsi_xfer *xp;
u_short target = INB (nc_ctest0) & 0x0f;
tcb_p tp;
u_char scntl3;
u_char sxfer;
assert (cp);
if (!cp) return;
xp = cp->xfer;
assert (xp);
if (!xp) return;
assert (target == (xp->sc_link->target & 0x0f));
tp = &np->target[target];
tp->widedone = wide+1;
scntl3 = (tp->wval & (~EWS)) | (wide ? EWS : 0);
sxfer = ack ? 0 : tp->sval;
/*
** Stop there if sync/wide parameters are unchanged
*/
if (tp->sval == sxfer && tp->wval == scntl3) return;
tp->sval = sxfer;
tp->wval = scntl3;
/*
** Bells and whistles ;-)
*/
PRINT_ADDR(xp);
if (scntl3 & EWS)
printf ("WIDE SCSI (16 bit) enabled");
else
printf ("WIDE SCSI disabled");
/*
** set actual value and sync_status
*/
OUTB (nc_sxfer, sxfer);
np->sync_st = sxfer;
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->sync_status = sxfer;
cp->wide_status = scntl3;
};
}
/*==========================================================
**
** Switch tagged mode for a target.
**
**==========================================================
*/
static void ncr_setmaxtags (tcb_p tp, u_long usrtags)
{
int l;
for (l=0; l<MAX_LUN; l++) {
lcb_p lp;
if (!tp) break;
lp=tp->lp[l];
if (!lp) continue;
ncr_settags (tp, lp, usrtags);
};
}
static void ncr_settags (tcb_p tp, lcb_p lp, u_long usrtags)
{
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[0] & 0x1f) != 0x00
|| (tp->inqdata[7] & INQ7_QUEUE) == 0
|| (tp->quirks & QUIRK_NOTAGS) != 0) {
usrtags=0;
}
if (usrtags) {
reqtags = 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;
if (lp->reqlink < lp->reqccbs)
lp->reqlink = lp->reqccbs;
}
/*----------------------------------------------------
**
** 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;
tp = &np->target[t];
tp->usrtags = np->user.data;
ncr_setmaxtags (tp, tp->usrtags);
};
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 (void *arg)
{
ncb_p np = arg;
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 try to wake it up.
*/
OUTB (nc_istat, SIGP);
};
/*----------------------------------------------------
**
** 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 ==
NCB_SCRIPT_PHYS (np, select)) {
printf ("%s: timeout ccb=%x (skip)\n",
ncr_name (np), (unsigned)cp);
cp->phys.header.launch.l_paddr
= NCB_SCRIPT_PHYS (np, skip);
};
switch (cp->host_status) {
case HS_BUSY:
case HS_NEGOTIATE:
/*
** still in start queue ?
*/
if (cp->phys.header.launch.l_paddr ==
NCB_SCRIPT_PHYS (np, skip))
continue;
/* fall through */
case HS_DISCONNECT:
cp->host_status=HS_TIMEOUT;
};
cp->tag = 0;
/*
** wakeup this ccb.
*/
ncr_complete (np, cp);
};
splx (oldspl);
}
np->timeout_ch = 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);
};
}
/*==========================================================
**
** log message for real hard errors
**
** "ncr0 targ 0?: ERROR (ds:si) (so-si-sd) (sxfer/scntl3) @ name (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
**
**==========================================================
*/
static void ncr_log_hard_error(ncb_p np, u_short sist, u_char dstat)
{
u_int32_t dsp;
int script_ofs;
int script_size;
char *script_name;
u_char *script_base;
int i;
dsp = INL (nc_dsp);
if (np->p_script < dsp &&
dsp <= np->p_script + sizeof(struct script)) {
script_ofs = dsp - np->p_script;
script_size = sizeof(struct script);
script_base = (u_char *) np->script;
script_name = "script";
}
else if (np->p_scripth < dsp &&
dsp <= np->p_scripth + sizeof(struct scripth)) {
script_ofs = dsp - np->p_scripth;
script_size = sizeof(struct scripth);
script_base = (u_char *) np->scripth;
script_name = "scripth";
} else {
script_ofs = dsp;
script_size = 0;
script_base = 0;
script_name = "mem";
}
printf ("%s:%d: ERROR (%x:%x) (%x-%x-%x) (%x/%x) @ (%s %x:%08x).\n",
ncr_name (np), (unsigned)INB (nc_ctest0)&0x0f, dstat, sist,
(unsigned)INB (nc_socl), (unsigned)INB (nc_sbcl), (unsigned)INB (nc_sbdl),
(unsigned)INB (nc_sxfer),(unsigned)INB (nc_scntl3), script_name, script_ofs,
(unsigned)INL (nc_dbc));
if (((script_ofs & 3) == 0) &&
(unsigned)script_ofs < script_size) {
printf ("%s: script cmd = %08x\n", ncr_name(np),
(int) *(ncrcmd *)(script_base + script_ofs));
}
printf ("%s: regdump:", ncr_name(np));
for (i=0; i<16;i++)
printf (" %02x", (unsigned)INB_OFF(i));
printf (".\n");
}
/*==========================================================
**
**
** ncr chip exception handler.
**
**
**==========================================================
*/
void ncr_exception (ncb_p np)
{
u_char istat, dstat;
u_short sist;
/*
** 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.
*/
sist = (istat & SIP) ? INW (nc_sist) : 0;
dstat = (istat & DIP) ? INB (nc_dstat) : 0;
np->profile.num_int++;
if (DEBUG_FLAGS & DEBUG_TINY)
printf ("<%d|%x:%x|%x:%x>",
INB(nc_scr0),
dstat,sist,
(unsigned)INL(nc_dsp),
(unsigned)INL(nc_dbc));
if ((dstat==DFE) && (sist==PAR)) return;
/*==========================================================
**
** First the normal cases.
**
**==========================================================
*/
/*-------------------------------------------
** SCSI reset
**-------------------------------------------
*/
if (sist & RST) {
ncr_init (np, bootverbose ? "scsi reset" : NULL, HS_RESET);
return;
};
/*-------------------------------------------
** selection timeout
**
** IID excluded from dstat mask!
** (chip bug)
**-------------------------------------------
*/
if ((sist & STO) &&
!(sist & (GEN|HTH|MA|SGE|UDC|RST|PAR)) &&
!(dstat & (MDPE|BF|ABRT|SIR))) {
ncr_int_sto (np);
return;
};
/*-------------------------------------------
** Phase mismatch.
**-------------------------------------------
*/
if ((sist & MA) &&
!(sist & (STO|GEN|HTH|SGE|UDC|RST|PAR)) &&
!(dstat & (MDPE|BF|ABRT|SIR|IID))) {
ncr_int_ma (np, dstat);
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, NCB_SCRIPT_PHYS (np, 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;
};
/*========================================
** log message for real hard errors
**========================================
*/
ncr_log_hard_error(np, sist, dstat);
/*========================================
** do the register dump
**========================================
*/
if (time.tv_sec - np->regtime.tv_sec>10) {
int i;
gettime(&np->regtime);
for (i=0; i<sizeof(np->regdump); i++)
((char*)&np->regdump)[i] = INB_OFF(i);
np->regdump.nc_dstat = dstat;
np->regdump.nc_sist = sist;
};
/*----------------------------------------
** 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, np->rv_ctest3 | CLF);
/* clear dma fifo */
}
/*----------------------------------------
** handshake timeout
**----------------------------------------
*/
if (sist & HTH) {
printf ("%s: handshake timeout\n", ncr_name(np));
OUTB (nc_scntl1, CRST);
DELAY (1000);
OUTB (nc_scntl1, 0x00);
OUTB (nc_scr0, HS_FAIL);
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, cleanup));
return;
}
/*----------------------------------------
** unexpected disconnect
**----------------------------------------
*/
if ((sist & UDC) &&
!(sist & (STO|GEN|HTH|MA|SGE|RST|PAR)) &&
!(dstat & (MDPE|BF|ABRT|SIR|IID))) {
OUTB (nc_scr0, HS_UNEXPECTED);
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, 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, np->rv_dcntl | STD);
/*
** info message
*/
printf ("%s: INFO: LDSC while IID.\n",
ncr_name (np));
return;
};
printf ("%s: target %d doesn't release the bus.\n",
ncr_name (np), INB (nc_ctest0)&0x0f);
/*
** return without restarting the NCR.
** timeout will do the real work.
*/
return;
};
/*----------------------------------------
** single step
**----------------------------------------
*/
if ((dstat & SSI) &&
!(sist & (STO|GEN|HTH|MA|SGE|UDC|RST|PAR)) &&
!(dstat & (MDPE|BF|ABRT|SIR|IID))) {
OUTB (nc_dcntl, np->rv_dcntl | STD);
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) {
/* clear scsi offsets */
OUTB (nc_ctest3, np->rv_ctest3 | CLF);
}
/*
** 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 (ncr_timeout, (caddr_t) np, np->timeout_ch);
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 && (CCB_PHYS (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 - NCB_SCRIPTH_PHYS (np, tryloop);
/* assert ((diff <= MAX_START * 20) && !(diff % 20));*/
if ((diff <= MAX_START * 20) && !(diff % 20)) {
np->script->startpos[0] = scratcha;
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, 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_char dstat)
{
u_int32_t dbc;
u_int32_t rest;
u_int32_t dsa;
u_int32_t dsp;
u_int32_t nxtdsp;
u_int32_t *vdsp;
u_int32_t oadr, olen;
u_int32_t *tblp, *newcmd;
u_char cmd, sbcl, ss0, ss2, ctest5;
u_short delta;
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;
ctest5 = (np->rv_ctest5 & DFS) ? INB (nc_ctest5) : 0;
if (ctest5 & DFS)
delta=(((ctest5<<8) | (INB (nc_dfifo) & 0xff)) - rest) & 0x3ff;
else
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 (!(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, np->rv_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 && (CCB_PHYS (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) np->ccb = 0x%08lx\n",
ncr_name (np), (u_long) cp, (u_long) np->header.cp, np->ccb);
/* 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 if (dsp > np->p_script &&
dsp <= np->p_script + sizeof(struct script)) {
vdsp = (u_int32_t *) ((char*)np->script - np->p_script + dsp-8);
nxtdsp = dsp;
} else {
vdsp = (u_int32_t *) ((char*)np->scripth - np->p_scripth+dsp-8);
nxtdsp = dsp;
};
/*
** log the information
*/
if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_PHASE)) {
printf ("P%x%x ",cmd&7, sbcl&7);
printf ("RL=%d D=%d SS0=%x ",
(unsigned) rest, (unsigned) delta, ss0);
};
if (DEBUG_FLAGS & DEBUG_PHASE) {
printf ("\nCP=%x CP2=%x DSP=%x NXT=%x VDSP=%x CMD=%x ",
(unsigned)cp, (unsigned)np->header.cp,
(unsigned)dsp,
(unsigned)nxtdsp, (unsigned)vdsp, cmd);
};
/*
** get old startaddress and old length.
*/
oadr = vdsp[1];
if (cmd & 0x10) { /* Table indirect */
tblp = (u_int32_t *) ((char*) &cp->phys + oadr);
olen = tblp[0];
oadr = tblp[1];
} else {
tblp = (u_int32_t *) 0;
olen = vdsp[0] & 0xffffff;
};
if (DEBUG_FLAGS & DEBUG_PHASE) {
printf ("OCMD=%x\nTBLP=%x OLEN=%x OADR=%x\n",
(unsigned) (vdsp[0] >> 24),
(unsigned) tblp,
(unsigned) olen,
(unsigned) oadr);
};
/*
** if old phase not dataphase, leave here.
*/
if (cmd != (vdsp[0] >> 24)) {
PRINT_ADDR(cp->xfer);
printf ("internal error: cmd=%02x != %02x=(vdsp[0] >> 24)\n",
(unsigned)cmd, (unsigned)vdsp[0] >> 24);
return;
}
if (cmd & 0x06) {
PRINT_ADDR(cp->xfer);
printf ("phase change %x-%x %d@%08x resid=%d.\n",
cmd&7, sbcl&7, (unsigned)olen,
(unsigned)oadr, (unsigned)rest);
OUTB (nc_dcntl, np->rv_dcntl | STD);
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));
if ((cmd & 7) == 0)
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, dispatch));
else
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, checkatn));
}
/*==========================================================
**
**
** 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 scntl3;
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) & 0x0f;
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 && (CCB_PHYS (cp, phys) != dsa))
cp = cp->link_ccb;
assert (cp);
if (!cp)
goto out;
assert (cp == np->header.cp);
if (cp != np->header.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, CCB_PHYS (cp, phys));
OUTL (nc_dsp, NCB_SCRIPTH_PHYS (np, getcc));
return;
};
/*
** no job, resume normal processing
*/
if (DEBUG_FLAGS & DEBUG_RESTART) printf (" -- remove trap\n");
np->script->start0[0] = SCR_INT ^ IFFALSE (0);
break;
case SIR_SENSE_FAILED:
/*-------------------------------------------
** While trying to select for
** getting the condition code,
** a target reselected us.
**-------------------------------------------
*/
if (DEBUG_FLAGS & DEBUG_RESTART) {
PRINT_ADDR(cp->xfer);
printf ("in getcc reselect by t%d.\n",
INB(nc_ssid) & 0x0f);
}
/*
** Mark this job
*/
cp->host_status = HS_BUSY;
cp->scsi_status = S_CHECK_COND;
np->target[cp->xfer->sc_link->target].hold_cp = cp;
/*
** And patch code to restart it.
*/
np->script->start0[0] = SCR_INT;
break;
/*-----------------------------------------------------------------------------
**
** Was Sie schon immer ueber transfermode negotiation wissen wollten ...
**
** We try to negotiate sync and wide transfer only after
** a successfull inquire command. We look at byte 7 of the
** inquire data to determine the capabilities if the target.
**
** When we try to negotiate, we append the negotiation message
** to the identify and (maybe) simple tag message.
** The host status field is set to HS_NEGOTIATE to mark this
** situation.
**
** If the target doesn't answer this message immidiately
** (as required by the standard), the SIR_NEGO_FAIL interrupt
** will be raised eventually.
** The handler removes the HS_NEGOTIATE status, and sets the
** negotiated value to the default (async / nowide).
**
** If we receive a matching answer immediately, we check it
** for validity, and set the values.
**
** If we receive a Reject message immediately, we assume the
** negotiation has failed, and fall back to standard values.
**
** If we receive a negotiation message while not in HS_NEGOTIATE
** state, it's a target initiated negotiation. We prepare a
** (hopefully) valid answer, set our parameters, and send back
** this answer to the target.
**
** If the target doesn't fetch the answer (no message out phase),
** we assume the negotiation has failed, and fall back to default
** settings.
**
** When we set the values, we adjust them in all ccbs belonging
** to this target, in the controller's register, and in the "phys"
** field of the controller's struct ncb.
**
** Possible cases: hs sir msg_in value send goto
** We try try to negotiate:
** -> target doesnt't msgin NEG FAIL noop defa. - dispatch
** -> target rejected our msg NEG FAIL reject defa. - dispatch
** -> target answered (ok) NEG SYNC sdtr set - clrack
** -> target answered (!ok) NEG SYNC sdtr defa. REJ--->msg_bad
** -> target answered (ok) NEG WIDE wdtr set - clrack
** -> target answered (!ok) NEG WIDE wdtr defa. REJ--->msg_bad
** -> any other msgin NEG FAIL noop defa. - dispatch
**
** Target tries to negotiate:
** -> incoming message --- SYNC sdtr set SDTR -
** -> incoming message --- WIDE wdtr set WDTR -
** We sent our answer:
** -> target doesn't msgout --- PROTO ? defa. - dispatch
**
**-----------------------------------------------------------------------------
*/
case SIR_NEGO_FAILED:
/*-------------------------------------------------------
**
** Negotiation failed.
** Target doesn't send an answer message,
** or target rejected our message.
**
** Remove negotiation request.
**
**-------------------------------------------------------
*/
OUTB (HS_PRT, HS_BUSY);
/* fall through */
case SIR_NEGO_PROTO:
/*-------------------------------------------------------
**
** Negotiation failed.
** Target doesn't fetch the answer message.
**
**-------------------------------------------------------
*/
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->xfer);
printf ("negotiation failed sir=%x status=%x.\n",
num, cp->nego_status);
};
/*
** any error in negotiation:
** fall back to default mode.
*/
switch (cp->nego_status) {
case NS_SYNC:
ncr_setsync (np, cp, 0, 0xe0);
break;
case NS_WIDE:
ncr_setwide (np, cp, 0, 0);
break;
};
np->msgin [0] = M_NOOP;
np->msgout[0] = M_NOOP;
cp->nego_status = 0;
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, 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->minsync)
{chg = 1; per = np->minsync;}
if (per < tp->minsync)
{chg = 1; per = tp->minsync;}
if (ofs > tp->maxoffs)
{chg = 1; ofs = tp->maxoffs;}
/*
** Check against controller limits.
*/
fak = 7;
scntl3 = 0;
if (ofs != 0) {
ncr_getsync(np, per, &fak, &scntl3);
if (fak > 7) {
chg = 1;
ofs = 0;
}
}
if (ofs == 0) {
fak = 7;
per = 0;
scntl3 = 0;
tp->minsync = 0;
}
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->xfer);
printf ("sync: per=%d scntl3=0x%x ofs=%d fak=%d chg=%d.\n",
per, scntl3, 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, 0, 0xe0);
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, msg_bad));
} else {
/*
** Answer is ok.
*/
ncr_setsync (np,cp,scntl3,(fak<<5)|ofs);
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, clrack));
};
return;
case NS_WIDE:
ncr_setwide (np, cp, 0, 0);
break;
};
};
/*
** It was a request. Set value and
** prepare an answer message
*/
ncr_setsync (np, cp, scntl3, (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->msgout);
printf (".\n");
}
if (!ofs) {
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, 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, 1);
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, msg_bad));
} else {
/*
** Answer is ok.
*/
ncr_setwide (np, cp, wide, 1);
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, clrack));
};
return;
case NS_SYNC:
ncr_setsync (np, cp, 0, 0xe0);
break;
};
};
/*
** It was a request, set value and
** prepare an answer message
*/
ncr_setwide (np, cp, wide, 1);
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->msgout);
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, NCB_SCRIPT_PHYS (np, 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, np->rv_dcntl | STD);
}
/*==========================================================
**
**
** 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;
int oldspl;
oldspl = splhigh();
/*
** 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) {
splx(oldspl);
return ((ccb_p) 0);
}
cp->magic = 1;
splx(oldspl);
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, u_long target, u_long lun)
{
tcb_p tp;
lcb_p lp;
ccb_p cp;
assert (np != NULL);
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] =
(np->features & FE_PFEN)? SCR_COPY(1) : SCR_COPY_F(1);
tp->getscr[1] = vtophys (&tp->sval);
tp->getscr[2] = np->paddr + offsetof (struct ncr_reg, nc_sxfer);
tp->getscr[3] =
(np->features & FE_PFEN)? SCR_COPY(1) : SCR_COPY_F(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 = NCB_SCRIPT_PHYS (np, resel_lun);
tp->jump_lcb.l_cmd = (SCR_JUMP);
tp->jump_lcb.l_paddr = NCB_SCRIPTH_PHYS (np, abort);
np->jump_tcb.l_paddr = vtophys (&tp->jump_tcb);
tp->usrtags = SCSI_NCR_DFLT_TAGS;
ncr_setmaxtags (tp, tp->usrtags);
}
/*
** 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 = NCB_SCRIPT_PHYS (np, resel_tag);
lp->jump_ccb.l_cmd = (SCR_JUMP);
lp->jump_ccb.l_paddr = NCB_SCRIPTH_PHYS (np, 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) {
printf ("new ccb @%x.\n", (unsigned) cp);
}
/*
** Count it
*/
lp->actccbs++;
np->actccbs++;
/*
** Initialize it
*/
bzero (cp, sizeof (*cp));
/*
** Fill in physical addresses
*/
cp->p_ccb = vtophys (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 = CCB_PHYS (cp, jump_ccb);
cp->call_tmp.l_cmd = SCR_CALL;
cp->call_tmp.l_paddr = NCB_SCRIPT_PHYS (np, 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;
#ifdef __NetBSD__
if (diff > xp->sc_link->openings)
diff = xp->sc_link->openings;
xp->sc_link->openings -= diff;
#else /* !__NetBSD__ */
if (diff > xp->sc_link->opennings)
diff = xp->sc_link->opennings;
xp->sc_link->opennings -= diff;
#endif /* __NetBSD__ */
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;
#ifdef __NetBSD__
xp->sc_link->openings += diff;
#else /* !__NetBSD__ */
xp->sc_link->opennings += diff;
#endif /* __NetBSD__ */
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 & PAGE_MASK) free -= datalen / PAGE_SIZE;
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 & (~PAGE_MASK)) + PAGE_SIZE;
/*
** 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_int32_t data, *addr;
/*
** ncr registers may NOT be cached.
** write 0xffffffff to a read only register area,
** and try to read it back.
*/
addr = (volatile u_int32_t *) &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_int32_t ncr_rd, ncr_wr, ncr_bk, host_rd, host_wr, pc;
int i, err=0;
#ifndef NCR_IOMAPPED
err |= ncr_regtest (np);
if (err) return (err);
#endif
/*
** init
*/
pc = NCB_SCRIPTH_PHYS (np, snooptest);
host_wr = 1;
ncr_wr = 2;
/*
** Set memory and register.
*/
ncr_cache = host_wr;
OUTL (nc_temp, ncr_wr);
/*
** Start script (exchange values)
*/
OUTL (nc_dsp, pc);
/*
** Wait 'til done (with timeout)
*/
for (i=0; i<NCR_SNOOP_TIMEOUT; i++)
if (INB(nc_istat) & (INTF|SIP|DIP))
break;
/*
** Save termination position.
*/
pc = INL (nc_dsp);
/*
** Read memory and register.
*/
host_rd = ncr_cache;
ncr_rd = INL (nc_scratcha);
ncr_bk = INL (nc_temp);
/*
** Reset ncr chip
*/
OUTB (nc_istat, SRST);
DELAY (1000);
OUTB (nc_istat, 0 );
/*
** check for timeout
*/
if (i>=NCR_SNOOP_TIMEOUT) {
printf ("CACHE TEST FAILED: timeout.\n");
return (0x20);
};
/*
** Check termination position.
*/
if (pc != NCB_SCRIPTH_PHYS (np, snoopend)+8) {
printf ("CACHE TEST FAILED: script execution failed.\n");
printf ("start=%08lx, pc=%08lx, end=%08lx\n",
(u_long) NCB_SCRIPTH_PHYS (np, snooptest), (u_long) pc,
(u_long) NCB_SCRIPTH_PHYS (np, snoopend) +8);
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;
gettime(&PROFILE.end);
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
/*==========================================================
**
** Determine the ncr's clock frequency.
** This is essential for the negotiation
** of the synchronous transfer rate.
**
**==========================================================
**
** Note: we have to return the correct value.
** THERE IS NO SAVE DEFAULT VALUE.
**
** Most NCR/SYMBIOS boards are delivered with a 40 Mhz clock.
** 53C860 and 53C875 rev. 1 support fast20 transfers but
** do not have a clock doubler and so are provided with a
** 80 MHz clock. All other fast20 boards incorporate a doubler
** and so should be delivered with a 40 MHz clock.
** The future fast40 chips (895/895) use a 40 Mhz base clock
** and provide a clock quadrupler (160 Mhz). The code below
** tries to deal as cleverly as possible with all this stuff.
**
**----------------------------------------------------------
*/
/*
* Select NCR SCSI clock frequency
*/
static void ncr_selectclock(ncb_p np, u_char scntl3)
{
if (np->multiplier < 2) {
OUTB(nc_scntl3, scntl3);
return;
}
if (bootverbose >= 2)
printf ("%s: enabling clock multiplier\n", ncr_name(np));
OUTB(nc_stest1, DBLEN); /* Enable clock multiplier */
if (np->multiplier > 2) { /* Poll bit 5 of stest4 for quadrupler */
int i = 20;
while (!(INB(nc_stest4) & LCKFRQ) && --i > 0)
DELAY(20);
if (!i)
printf("%s: the chip cannot lock the frequency\n", ncr_name(np));
} else /* Wait 20 micro-seconds for doubler */
DELAY(20);
OUTB(nc_stest3, HSC); /* Halt the scsi clock */
OUTB(nc_scntl3, scntl3);
OUTB(nc_stest1, (DBLEN|DBLSEL));/* Select clock multiplier */
OUTB(nc_stest3, 0x00); /* Restart scsi clock */
}
/*
* calculate NCR SCSI clock frequency (in KHz)
*/
static unsigned
ncrgetfreq (ncb_p np, int gen)
{
int ms = 0;
/*
* Measure GEN timer delay in order
* to calculate SCSI clock frequency
*
* This code will never execute too
* many loop iterations (if DELAY is
* reasonably correct). It could get
* too low a delay (too high a freq.)
* if the CPU is slow executing the
* loop for some reason (an NMI, for
* example). For this reason we will
* if multiple measurements are to be
* performed trust the higher delay
* (lower frequency returned).
*/
OUTB (nc_stest1, 0); /* make sure clock doubler is OFF */
OUTW (nc_sien , 0); /* mask all scsi interrupts */
(void) INW (nc_sist); /* clear pending scsi interrupt */
OUTB (nc_dien , 0); /* mask all dma interrupts */
(void) INW (nc_sist); /* another one, just to be sure :) */
OUTB (nc_scntl3, 4); /* set pre-scaler to divide by 3 */
OUTB (nc_stime1, 0); /* disable general purpose timer */
OUTB (nc_stime1, gen); /* set to nominal delay of (1<<gen) * 125us */
while (!(INW(nc_sist) & GEN) && ms++ < 1000)
DELAY(1000); /* count ms */
OUTB (nc_stime1, 0); /* disable general purpose timer */
OUTB (nc_scntl3, 0);
/*
* Set prescaler to divide by whatever "0" means.
* "0" ought to choose divide by 2, but appears
* to set divide by 3.5 mode in my 53c810 ...
*/
OUTB (nc_scntl3, 0);
if (bootverbose >= 2)
printf ("\tDelay (GEN=%d): %lu msec\n", gen, ms);
/*
* adjust for prescaler, and convert into KHz
*/
return ms ? ((1 << gen) * 4440) / ms : 0;
}
static void ncr_getclock (ncb_p np, u_char multiplier)
{
unsigned char scntl3;
unsigned char stest1;
scntl3 = INB(nc_scntl3);
stest1 = INB(nc_stest1);
np->multiplier = 1;
/* always false, except for 875 with clock doubler selected */
if ((stest1 & (DBLEN+DBLSEL)) == DBLEN+DBLSEL) {
np->multiplier = multiplier;
np->clock_khz = 40000 * multiplier;
} else {
if ((scntl3 & 7) == 0) {
unsigned f1, f2;
/* throw away first result */
(void) ncrgetfreq (np, 11);
f1 = ncrgetfreq (np, 11);
f2 = ncrgetfreq (np, 11);
if (bootverbose >= 2)
printf ("\tNCR clock is %luKHz, %luKHz\n", f1, f2);
if (f1 > f2) f1 = f2; /* trust lower result */
if (f1 > 45000) {
scntl3 = 5; /* >45Mhz: assume 80MHz */
} else {
scntl3 = 3; /* <45Mhz: assume 40MHz */
}
}
else if ((scntl3 & 7) == 5)
np->clock_khz = 80000; /* Probably a 875 rev. 1 ? */
}
}
/*=========================================================================*/
#ifdef NCR_TEKRAM_EEPROM
struct tekram_eeprom_dev {
u_char devmode;
#define TKR_PARCHK 0x01
#define TKR_TRYSYNC 0x02
#define TKR_ENDISC 0x04
#define TKR_STARTUNIT 0x08
#define TKR_USETAGS 0x10
#define TKR_TRYWIDE 0x20
u_char syncparam; /* max. sync transfer rate (table ?) */
u_char filler1;
u_char filler2;
};
struct tekram_eeprom {
struct tekram_eeprom_dev
dev[16];
u_char adaptid;
u_char adaptmode;
#define TKR_ADPT_GT2DRV 0x01
#define TKR_ADPT_GT1GB 0x02
#define TKR_ADPT_RSTBUS 0x04
#define TKR_ADPT_ACTNEG 0x08
#define TKR_ADPT_NOSEEK 0x10
#define TKR_ADPT_MORLUN 0x20
u_char delay; /* unit ? (table ???) */
u_char tags; /* use 4 times as many ... */
u_char filler[60];
};
static void
tekram_write_bit (ncb_p np, int bit)
{
u_char val = 0x10 + ((bit & 1) << 1);
DELAY(10);
OUTB (nc_gpreg, val);
DELAY(10);
OUTB (nc_gpreg, val | 0x04);
DELAY(10);
OUTB (nc_gpreg, val);
DELAY(10);
}
static int
tekram_read_bit (ncb_p np)
{
OUTB (nc_gpreg, 0x10);
DELAY(10);
OUTB (nc_gpreg, 0x14);
DELAY(10);
return INB (nc_gpreg) & 1;
}
static u_short
read_tekram_eeprom_reg (ncb_p np, int reg)
{
int bit;
u_short result = 0;
int cmd = 0x80 | reg;
OUTB (nc_gpreg, 0x10);
tekram_write_bit (np, 1);
for (bit = 7; bit >= 0; bit--)
{
tekram_write_bit (np, cmd >> bit);
}
for (bit = 0; bit < 16; bit++)
{
result <<= 1;
result |= tekram_read_bit (np);
}
OUTB (nc_gpreg, 0x00);
return result;
}
static int
read_tekram_eeprom(ncb_p np, struct tekram_eeprom *buffer)
{
u_short *p = (u_short *) buffer;
u_short sum = 0;
int i;
if (INB (nc_gpcntl) != 0x09)
{
return 0;
}
for (i = 0; i < 64; i++)
{
u_short val;
if((i&0x0f) == 0) printf ("%02x:", i*2);
val = read_tekram_eeprom_reg (np, i);
if (p)
*p++ = val;
sum += val;
if((i&0x01) == 0x00) printf (" ");
printf ("%02x%02x", val & 0xff, (val >> 8) & 0xff);
if((i&0x0f) == 0x0f) printf ("\n");
}
printf ("Sum = %04x\n", sum);
return sum == 0x1234;
}
#endif /* NCR_TEKRAM_EEPROM */
/*=========================================================================*/
#endif /* KERNEL */
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