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ncr53c8xx.c：源码内容

/******************************************************************************
** Device driver for the PCI-SCSI NCR538XX controller family.
**
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
**
**-----------------------------------------------------------------------------
**
** This driver has been ported to Linux from the FreeBSD NCR53C8XX driver
** and is currently maintained by
**
** Gerard Roudier <groudier@free.fr>
**
** Being given that this driver originates from the FreeBSD version, and
** in order to keep synergy on both, any suggested enhancements and corrections
** received on Linux are automatically a potential candidate for the FreeBSD
** version.
**
** The original driver has been written for 386bsd and FreeBSD by
** Wolfgang Stanglmeier <wolf@cologne.de>
** Stefan Esser <se@mi.Uni-Koeln.de>
**
** And has been ported to NetBSD by
** Charles M. Hannum <mycroft@gnu.ai.mit.edu>
**
**-----------------------------------------------------------------------------
**
** Brief history
**
** December 10 1995 by Gerard Roudier:
** Initial port to Linux.
**
** June 23 1996 by Gerard Roudier:
** Support for 64 bits architectures (Alpha).
**
** November 30 1996 by Gerard Roudier:
** Support for Fast-20 scsi.
** Support for large DMA fifo and 128 dwords bursting.
**
** February 27 1997 by Gerard Roudier:
** Support for Fast-40 scsi.
** Support for on-Board RAM.
**
** May 3 1997 by Gerard Roudier:
** Full support for scsi scripts instructions pre-fetching.
**
** May 19 1997 by Richard Waltham <dormouse@farsrobt.demon.co.uk>:
** Support for NvRAM detection and reading.
**
** August 18 1997 by Cort <cort@cs.nmt.edu>:
** Support for Power/PC (Big Endian).
**
** June 20 1998 by Gerard Roudier
** Support for up to 64 tags per lun.
** O(1) everywhere (C and SCRIPTS) for normal cases.
** Low PCI traffic for command handling when on-chip RAM is present.
** Aggressive SCSI SCRIPTS optimizations.
**
*******************************************************************************
*/
/*
** Supported SCSI-II features:
** Synchronous negotiation
** Wide negotiation (depends on the NCR Chip)
** Enable disconnection
** Tagged command queuing
** Parity checking
** Etc...
**
** Supported NCR/SYMBIOS chips:
** 53C810 (8 bits, Fast SCSI-2, no rom BIOS)
** 53C815 (8 bits, Fast SCSI-2, on board rom BIOS)
** 53C820 (Wide, Fast SCSI-2, no rom BIOS)
** 53C825 (Wide, Fast SCSI-2, on board rom BIOS)
** 53C860 (8 bits, Fast 20, no rom BIOS)
** 53C875 (Wide, Fast 20, on board rom BIOS)
** 53C895 (Wide, Fast 40, on board rom BIOS)
** 53C895A (Wide, Fast 40, on board rom BIOS)
** 53C896 (Wide, Fast 40, on board rom BIOS)
** 53C897 (Wide, Fast 40, on board rom BIOS)
** 53C1510D (Wide, Fast 40, on board rom BIOS)
**
** Other features:
** Memory mapped IO (linux-1.3.X and above only)
** Module
** Shared IRQ (since linux-1.3.72)
*/
/*
** Name and version of the driver
*/
#define SCSI_NCR_DRIVER_NAME "ncr53c8xx-3.4.3b-20010512"
#define SCSI_NCR_DEBUG_FLAGS (0)
/*==========================================================
**
** Include files
**
**==========================================================
*/
#define LinuxVersionCode(v, p, s) (((v)<<16)+((p)<<8)+(s))
#include <linux/module.h>
#include <asm/dma.h>
#include <asm/io.h>
#include <asm/system.h>
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,3,17)
#include <linux/spinlock.h>
#elif LINUX_VERSION_CODE >= LinuxVersionCode(2,1,93)
#include <asm/spinlock.h>
#endif
#include <linux/delay.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/pci.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/ioport.h>
#include <linux/time.h>
#include <linux/timer.h>
#include <linux/stat.h>
#include <linux/version.h>
#include <linux/blk.h>
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,35)
#include <linux/init.h>
#endif
#ifndef __init
#define __init
#endif
#ifndef __initdata
#define __initdata
#endif
#if LINUX_VERSION_CODE <= LinuxVersionCode(2,1,92)
#include <linux/bios32.h>
#endif
#include "scsi.h"
#include "hosts.h"
#include "constants.h"
#include "sd.h"
#include <linux/types.h>
/*
** Define BITS_PER_LONG for earlier linux versions.
*/
#ifndef BITS_PER_LONG
#if (~0UL) == 0xffffffffUL
#define BITS_PER_LONG 32
#else
#define BITS_PER_LONG 64
#endif
#endif
/*
** Define the BSD style u_int32 and u_int64 type.
** Are in fact u_int32_t and u_int64_t :-)
*/
typedef u32 u_int32;
typedef u64 u_int64;
typedef u_long vm_offset_t;
#include "ncr53c8xx.h"
/*
** Donnot compile integrity checking code for Linux-2.3.0
** and above since SCSI data structures are not ready yet.
*/
/* #if LINUX_VERSION_CODE < LinuxVersionCode(2,3,0) */
#if 0
#define SCSI_NCR_INTEGRITY_CHECKING
#endif
#define NAME53C "ncr53c"
#define NAME53C8XX "ncr53c8xx"
#define DRIVER_SMP_LOCK ncr53c8xx_lock
#include "sym53c8xx_comm.h"
/*==========================================================
**
** The CCB done queue uses an array of CCB virtual
** addresses. Empty entries are flagged using the bogus
** virtual address 0xffffffff.
**
** Since PCI ensures that only aligned DWORDs are accessed
** atomically, 64 bit little-endian architecture requires
** to test the high order DWORD of the entry to determine
** if it is empty or valid.
**
** BTW, I will make things differently as soon as I will
** have a better idea, but this is simple and should work.
**
**==========================================================
*/
#define SCSI_NCR_CCB_DONE_SUPPORT
#ifdef SCSI_NCR_CCB_DONE_SUPPORT
#define MAX_DONE 24
#define CCB_DONE_EMPTY 0xffffffffUL
/* All 32 bit architectures */
#if BITS_PER_LONG == 32
#define CCB_DONE_VALID(cp) (((u_long) cp) != CCB_DONE_EMPTY)
/* All > 32 bit (64 bit) architectures regardless endian-ness */
#else
#define CCB_DONE_VALID(cp)
((((u_long) cp) & 0xffffffff00000000ul) &&
(((u_long) cp) & 0xfffffffful) != CCB_DONE_EMPTY)
#endif
#endif /* SCSI_NCR_CCB_DONE_SUPPORT */
/*==========================================================
**
** Configuration and Debugging
**
**==========================================================
*/
/*
** 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
/*
** The maximum number of tags per logic unit.
** Used only for disk devices that support tags.
*/
#ifndef SCSI_NCR_MAX_TAGS
#define SCSI_NCR_MAX_TAGS (8)
#endif
/*
** TAGS are actually limited to 64 tags/lun.
** We need to deal with power of 2, for alignment constraints.
*/
#if SCSI_NCR_MAX_TAGS > 64
#define MAX_TAGS (64)
#else
#define MAX_TAGS SCSI_NCR_MAX_TAGS
#endif
#define NO_TAG (255)
/*
** Choose appropriate type for tag bitmap.
*/
#if MAX_TAGS > 32
typedef u_int64 tagmap_t;
#else
typedef u_int32 tagmap_t;
#endif
/*
** Number of targets supported by the driver.
** n permits target numbers 0..n-1.
** Default is 16, meaning targets #0..#15.
** #7 .. is myself.
*/
#ifdef SCSI_NCR_MAX_TARGET
#define MAX_TARGET (SCSI_NCR_MAX_TARGET)
#else
#define MAX_TARGET (16)
#endif
/*
** 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.
*/
#ifdef SCSI_NCR_MAX_LUN
#define MAX_LUN SCSI_NCR_MAX_LUN
#else
#define MAX_LUN (1)
#endif
/*
** Asynchronous pre-scaler (ns). Shall be 40
*/
#ifndef SCSI_NCR_MIN_ASYNC
#define SCSI_NCR_MIN_ASYNC (40)
#endif
/*
** 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 ...
*/
#ifdef SCSI_NCR_CAN_QUEUE
#define MAX_START (SCSI_NCR_CAN_QUEUE + 4)
#else
#define MAX_START (MAX_TARGET + 7 * MAX_TAGS)
#endif
/*
** We limit the max number of pending IO to 250.
** since we donnot want to allocate more than 1
** PAGE for 'scripth'.
*/
#if MAX_START > 250
#undef MAX_START
#define MAX_START 250
#endif
/*
** The maximum number of segments a transfer is split into.
** We support up to 127 segments for both read and write.
** The data scripts are broken into 2 sub-scripts.
** 80 (MAX_SCATTERL) segments are moved from a sub-script
** in on-chip RAM. This makes data transfers shorter than
** 80k (assuming 1k fs) as fast as possible.
*/
#define MAX_SCATTER (SCSI_NCR_MAX_SCATTER)
#if (MAX_SCATTER > 80)
#define MAX_SCATTERL 80
#define MAX_SCATTERH (MAX_SCATTER - MAX_SCATTERL)
#else
#define MAX_SCATTERL (MAX_SCATTER-1)
#define MAX_SCATTERH 1
#endif
/*
** other
*/
#define NCR_SNOOP_TIMEOUT (1000000)
/*
** Head of list of NCR boards
**
** For kernel version < 1.3.70, host is retrieved by its irq level.
** For later kernels, the internal host control block address
** (struct ncb) is used as device id parameter of the irq stuff.
*/
static struct Scsi_Host *first_host = NULL;
static Scsi_Host_Template *the_template = NULL;
/*
** Other definitions
*/
#define ScsiResult(host_code, scsi_code) (((host_code) << 16) + ((scsi_code) & 0x7f))
static void ncr53c8xx_select_queue_depths(
struct Scsi_Host *host, struct scsi_device *devlist);
static void ncr53c8xx_intr(int irq, void *dev_id, struct pt_regs * regs);
static void ncr53c8xx_timeout(unsigned long np);
#define initverbose (driver_setup.verbose)
#define bootverbose (np->verbose)
#ifdef SCSI_NCR_NVRAM_SUPPORT
static u_char Tekram_sync[16] __initdata =
{25,31,37,43, 50,62,75,125, 12,15,18,21, 6,7,9,10};
#endif /* SCSI_NCR_NVRAM_SUPPORT */
/*==========================================================
**
** 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_DONEMASK (0x80)
#define HS_COMPLETE (4|HS_DONEMASK)
#define HS_SEL_TIMEOUT (5|HS_DONEMASK) /* Selection timeout */
#define HS_RESET (6|HS_DONEMASK) /* SCSI reset */
#define HS_ABORTED (7|HS_DONEMASK) /* Transfer aborted */
#define HS_TIMEOUT (8|HS_DONEMASK) /* Software timeout */
#define HS_FAIL (9|HS_DONEMASK) /* SCSI or PCI bus errors */
#define HS_UNEXPECTED (10|HS_DONEMASK)/* Unexpected disconnect */
/*
** Invalid host status values used by the SCRIPTS processor
** when the nexus is not fully identified.
** Shall never appear in a CCB.
*/
#define HS_INVALMASK (0x40)
#define HS_SELECTING (0|HS_INVALMASK)
#define HS_IN_RESELECT (1|HS_INVALMASK)
#define HS_STARTING (2|HS_INVALMASK)
/*
** Flags set by the SCRIPT processor for commands
** that have been skipped.
*/
#define HS_SKIPMASK (0x20)
/*==========================================================
**
** Software Interrupt Codes
**
**==========================================================
*/
#define SIR_BAD_STATUS (1)
#define SIR_XXXXXXXXXX (2)
#define SIR_NEGO_SYNC (3)
#define SIR_NEGO_WIDE (4)
#define SIR_NEGO_FAILED (5)
#define SIR_NEGO_PROTO (6)
#define SIR_REJECT_RECEIVED (7)
#define SIR_REJECT_SENT (8)
#define SIR_IGN_RESIDUE (9)
#define SIR_MISSING_SAVE (10)
#define SIR_RESEL_NO_MSG_IN (11)
#define SIR_RESEL_NO_IDENTIFY (12)
#define SIR_RESEL_BAD_LUN (13)
#define SIR_RESEL_BAD_TARGET (14)
#define SIR_RESEL_BAD_I_T_L (15)
#define SIR_RESEL_BAD_I_T_L_Q (16)
#define SIR_DONE_OVERFLOW (17)
#define SIR_MAX (17)
/*==========================================================
**
** 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_NOCHANGE (0)
#define NS_SYNC (1)
#define NS_WIDE (2)
#define NS_PPR (4)
/*==========================================================
**
** "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)
/*==========================================================
**
** Capability bits in Inquire response byte 7.
**
**==========================================================
*/
#define INQ7_QUEUE (0x02)
#define INQ7_SYNC (0x10)
#define INQ7_WIDE16 (0x20)
/*==========================================================
**
** Misc.
**
**==========================================================
*/
#define CCB_MAGIC (0xf2691ad2)
/*==========================================================
**
** 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 UC_SETVERBOSE 17
#define UF_TRACE (0x01)
#define UF_NODISC (0x02)
#define UF_NOSCAN (0x04)
/*========================================================================
**
** 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];
/*----------------------------------------------------------------
** Get the IDENTIFY message and load the LUN to SFBR.
**
** CALL, <RESEL_LUN>
**----------------------------------------------------------------
*/
struct link call_lun;
/*----------------------------------------------------------------
** Now look for the right lun.
**
** For i = 0 to 3
** SCR_JUMP ^ IFTRUE(MASK(i, 3)), @(first lcb mod. i)
**
** Recent chips will prefetch the 4 JUMPS using only 1 burst.
** It is kind of hashcoding.
**----------------------------------------------------------------
*/
struct link jump_lcb[4]; /* JUMPs for reselection */
lcb_p lp[MAX_LUN]; /* The lcb's of this tcb */
u_char inq_done; /* Target capabilities received */
u_char inq_byte7; /* Contains these capabilities */
/*----------------------------------------------------------------
** Pointer to the ccb used for negotiation.
** Prevent from starting a negotiation for all queued commands
** when tagged command queuing is enabled.
**----------------------------------------------------------------
*/
ccb_p nego_cp;
/*----------------------------------------------------------------
** statistical data
**----------------------------------------------------------------
*/
u_long transfers;
u_long bytes;
/*----------------------------------------------------------------
** negotiation of wide and synch transfer and 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;
#ifdef SCSI_NCR_INTEGRITY_CHECKING
u_char ic_min_sync;
u_char ic_max_width;
u_char ic_maximums_set;
u_char ic_done;
#endif
/*----------------------------------------------------------------
** User settable limits and options.
** These limits are read from the NVRAM if present.
**----------------------------------------------------------------
*/
u_char usrsync;
u_char usrwide;
u_char usrtags;
u_char usrflag;
};
/*========================================================================
**
** 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)
**
** It is this lun. Load TEMP with the nexus jumps table
** address and jump to RESEL_TAG (or RESEL_NOTAG).
**
** SCR_COPY (4), p_jump_ccb, TEMP,
** SCR_JUMP, <RESEL_TAG>
**----------------------------------------------------------------
*/
struct link jump_lcb;
ncrcmd load_jump_ccb[3];
struct link jump_tag;
ncrcmd p_jump_ccb; /* Jump table bus address */
/*----------------------------------------------------------------
** Jump table used by the script processor to directly jump
** to the CCB corresponding to the reselected nexus.
** Address is allocated on 256 bytes boundary in order to
** allow 8 bit calculation of the tag jump entry for up to
** 64 possible tags.
**----------------------------------------------------------------
*/
u_int32 jump_ccb_0; /* Default table if no tags */
u_int32 *jump_ccb; /* Virtual address */
/*----------------------------------------------------------------
** CCB queue management.
**----------------------------------------------------------------
*/
XPT_QUEHEAD free_ccbq; /* Queue of available CCBs */
XPT_QUEHEAD busy_ccbq; /* Queue of busy CCBs */
XPT_QUEHEAD wait_ccbq; /* Queue of waiting for IO CCBs */
XPT_QUEHEAD skip_ccbq; /* Queue of skipped CCBs */
u_char actccbs; /* Number of allocated CCBs */
u_char busyccbs; /* CCBs busy for this lun */
u_char queuedccbs; /* CCBs queued to the controller*/
u_char queuedepth; /* Queue depth for this lun */
u_char scdev_depth; /* SCSI device queue depth */
u_char maxnxs; /* Max possible nexuses */
/*----------------------------------------------------------------
** Control of tagged command queuing.
** Tags allocation is performed using a circular buffer.
** This avoids using a loop for tag allocation.
**----------------------------------------------------------------
*/
u_char ia_tag; /* Allocation index */
u_char if_tag; /* Freeing index */
u_char cb_tags[MAX_TAGS]; /* Circular tags buffer */
u_char usetags; /* Command queuing is active */
u_char maxtags; /* Max nr of tags asked by user */
u_char numtags; /* Current number of tags */
u_char inq_byte7; /* Store unit CmdQ capabitility */
/*----------------------------------------------------------------
** QUEUE FULL control and ORDERED tag control.
**----------------------------------------------------------------
*/
/*----------------------------------------------------------------
** QUEUE FULL and ORDERED tag control.
**----------------------------------------------------------------
*/
u_short num_good; /* Nr of GOOD since QUEUE FULL */
tagmap_t tags_umap; /* Used tags bitmap */
tagmap_t tags_smap; /* Tags in use at 'tag_stime' */
u_long tags_stime; /* Last time we set smap=umap */
ccb_p held_ccb; /* CCB held for QUEUE FULL */
};
/*========================================================================
**
** Declaration of structs: the launch script.
**
**========================================================================
**
** It is part of the CCB and is called by the scripts processor to
** start or restart the data structure (nexus).
** This 6 DWORDs mini script makes use of prefetching.
**
**------------------------------------------------------------------------
*/
struct launch {
/*----------------------------------------------------------------
** SCR_COPY(4), @(p_phys), @(dsa register)
** SCR_JUMP, @(scheduler_point)
**----------------------------------------------------------------
*/
ncrcmd setup_dsa[3]; /* Copy 'phys' address to dsa */
struct link schedule; /* Jump to scheduler point */
ncrcmd p_phys; /* 'phys' header bus address */
};
/*========================================================================
**
** Declaration of structs: global HEADER.
**
**========================================================================
**
** 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 {
/*----------------------------------------------------------------
** Saved data pointer.
** Points to the position in the script responsible for the
** actual transfer transfer of data.
** It's written after reception of a SAVE_DATA_POINTER message.
** The goalpointer points after the last transfer command.
**----------------------------------------------------------------
*/
u_int32 savep;
u_int32 lastp;
u_int32 goalp;
/*----------------------------------------------------------------
** Alternate data pointer.
** They are copied back to savep/lastp/goalp by the SCRIPTS
** when the direction is unknown and the device claims data out.
**----------------------------------------------------------------
*/
u_int32 wlastp;
u_int32 wgoalp;
/*----------------------------------------------------------------
** The virtual address of the ccb containing this header.
**----------------------------------------------------------------
*/
ccb_p cp;
/*----------------------------------------------------------------
** Status fields.
**----------------------------------------------------------------
*/
u_char scr_st[4]; /* script status */
u_char status[4]; /* host status. must be the */
/* last DWORD of the header. */
};
/*
** The status bytes are used by the host and the script processor.
**
** The byte corresponding to the host_status must be stored in the
** last DWORD of the CCB header since it is used for command
** completion (ncr_wakeup()). Doing so, we are sure that the header
** has been entirely copied back to the CCB when the host_status is
** seen complete by the CPU.
**
** The last four bytes (status[4]) 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 first four bytes (scr_st[4]) are used inside the script by
** "COPY" commands.
** Because source and destination must have the same alignment
** in a DWORD, the fields HAVE to be at the choosen offsets.
** xerr_st 0 (0x34) scratcha
** sync_st 1 (0x05) sxfer
** wide_st 3 (0x03) scntl3
*/
/*
** Last four bytes (script)
*/
#define QU_REG scr0
#define HS_REG scr1
#define HS_PRT nc_scr1
#define SS_REG scr2
#define SS_PRT nc_scr2
#define PS_REG scr3
/*
** Last 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]
/*
** First four bytes (script)
*/
#define xerr_st header.scr_st[0]
#define sync_st header.scr_st[1]
#define nego_st header.scr_st[2]
#define wide_st header.scr_st[3]
/*
** First four bytes (host)
*/
#define xerr_status phys.xerr_st
#define nego_status phys.nego_st
#if 0
#define sync_status phys.sync_st
#define wide_status phys.wide_st
#endif
/*==========================================================
**
** 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.
*/
struct head header;
/*
** Table data for Script
*/
struct scr_tblsel select;
struct scr_tblmove smsg ;
struct scr_tblmove cmd ;
struct scr_tblmove sense ;
struct scr_tblmove data [MAX_SCATTER];
};
/*========================================================================
**
** Declaration of structs: Command control block.
**
**========================================================================
*/
struct ccb {
/*----------------------------------------------------------------
** This is the data structure which is pointed by the DSA
** register when it is executed by the script processor.
** It must be the first entry because it contains the header
** as first entry that must be cache line aligned.
**----------------------------------------------------------------
*/
struct dsb phys;
/*----------------------------------------------------------------
** Mini-script used at CCB execution start-up.
** Load the DSA with the data structure address (phys) and
** jump to SELECT. Jump to CANCEL if CCB is to be canceled.
**----------------------------------------------------------------
*/
struct launch start;
/*----------------------------------------------------------------
** Mini-script used at CCB relection to restart the nexus.
** Load the DSA with the data structure address (phys) and
** jump to RESEL_DSA. Jump to ABORT if CCB is to be aborted.
**----------------------------------------------------------------
*/
struct launch restart;
/*----------------------------------------------------------------
** 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.
**----------------------------------------------------------------
*/
Scsi_Cmnd *cmd; /* SCSI command */
u_char cdb_buf[16]; /* Copy of CDB */
u_char sense_buf[64];
int data_len; /* Total data length */
/*----------------------------------------------------------------
** Message areas.
** We prepare a message to be sent after selection.
** We may use a second one if the command is rescheduled
** due to GETCC or QFULL.
** Contents are IDENTIFY and SIMPLE_TAG.
** While negotiating sync or wide transfer,
** a SDTR or WDTR message is appended.
**----------------------------------------------------------------
*/
u_char scsi_smsg [8];
u_char scsi_smsg2[8];
/*----------------------------------------------------------------
** Other fields.
**----------------------------------------------------------------
*/
u_long p_ccb; /* BUS address of this CCB */
u_char sensecmd[6]; /* Sense command */
u_char tag; /* Tag for this transfer */
/* 255 means no tag */
u_char target;
u_char lun;
u_char queued;
u_char auto_sense;
ccb_p link_ccb; /* Host adapter CCB chain */
XPT_QUEHEAD link_ccbq; /* Link to unit CCB queue */
u_int32 startp; /* Initial data pointer */
u_long magic; /* Free / busy CCB flag */
};
#define CCB_PHYS(cp,lbl) (cp->p_ccb + offsetof(struct ccb, lbl))
/*========================================================================
**
** Declaration of structs: NCR device descriptor
**
**========================================================================
*/
struct ncb {
/*----------------------------------------------------------------
** The global header.
** It is accessible to both the host and the script processor.
** Must be cache line size aligned (32 for x86) in order to
** allow cache line bursting when it is copied to/from CCB.
**----------------------------------------------------------------
*/
struct head header;
/*----------------------------------------------------------------
** CCBs management queues.
**----------------------------------------------------------------
*/
Scsi_Cmnd *waiting_list; /* Commands waiting for a CCB */
/* when lcb is not allocated. */
Scsi_Cmnd *done_list; /* Commands waiting for done() */
/* callback to be invoked. */
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,93)
spinlock_t smp_lock; /* Lock for SMP threading */
#endif
/*----------------------------------------------------------------
** Chip and controller indentification.
**----------------------------------------------------------------
*/
int unit; /* Unit number */
char chip_name[8]; /* Chip name */
char inst_name[16]; /* ncb instance name */
/*----------------------------------------------------------------
** Initial value of some IO register bits.
** These values are assumed to have been set by BIOS, and may
** be used for probing adapter implementation differences.
**----------------------------------------------------------------
*/
u_char sv_scntl0, sv_scntl3, sv_dmode, sv_dcntl, sv_ctest3, sv_ctest4,
sv_ctest5, sv_gpcntl, sv_stest2, sv_stest4;
/*----------------------------------------------------------------
** Actual initial value of IO register bits used by the
** driver. They are loaded at initialisation according to
** features that are to be enabled.
**----------------------------------------------------------------
*/
u_char rv_scntl0, rv_scntl3, rv_dmode, rv_dcntl, rv_ctest3, rv_ctest4,
rv_ctest5, rv_stest2;
/*----------------------------------------------------------------
** Targets management.
** During reselection the ncr jumps to jump_tcb.
** The SFBR register is loaded with the encoded target id.
** For i = 0 to 3
** SCR_JUMP ^ IFTRUE(MASK(i, 3)), @(next tcb mod. i)
**
** Recent chips will prefetch the 4 JUMPS using only 1 burst.
** It is kind of hashcoding.
**----------------------------------------------------------------
*/
struct link jump_tcb[4]; /* JUMPs for reselection */
struct tcb target[MAX_TARGET]; /* Target data */
/*----------------------------------------------------------------
** Virtual and physical bus addresses of the chip.
**----------------------------------------------------------------
*/
vm_offset_t vaddr; /* Virtual and bus address of */
vm_offset_t paddr; /* chip's IO registers. */
vm_offset_t paddr2; /* On-chip RAM bus address. */
volatile /* Pointer to volatile for */
struct ncr_reg *reg; /* memory mapped IO. */
/*----------------------------------------------------------------
** SCRIPTS virtual and physical bus addresses.
** 'script' is loaded in the on-chip RAM if present.
** 'scripth' stays in main memory.
**----------------------------------------------------------------
*/
struct script *script0; /* Copies of script and scripth */
struct scripth *scripth0; /* relocated for this ncb. */
struct scripth *scripth; /* Actual scripth virt. address */
u_long p_script; /* Actual script and scripth */
u_long p_scripth; /* bus addresses. */
/*----------------------------------------------------------------
** General controller parameters and configuration.
**----------------------------------------------------------------
*/
pcidev_t pdev;
u_short device_id; /* PCI device id */
u_char revision_id; /* PCI device revision id */
u_char bus; /* PCI BUS number */
u_char device_fn; /* PCI BUS device and function */
u_long base_io; /* IO space base address */
u_int irq; /* IRQ level */
u_int features; /* Chip features map */
u_char myaddr; /* SCSI id of the adapter */
u_char maxburst; /* log base 2 of dwords burst */
u_char maxwide; /* Maximum transfer width */
u_char minsync; /* Minimum sync period factor */
u_char maxsync; /* Maximum sync period factor */
u_char maxoffs; /* Max scsi offset */
u_char multiplier; /* Clock multiplier (1,2,4) */
u_char clock_divn; /* Number of clock divisors */
u_long clock_khz; /* SCSI clock frequency in KHz */
/*----------------------------------------------------------------
** Start queue management.
** It is filled up by the host processor and accessed by the
** SCRIPTS processor in order to start SCSI commands.
**----------------------------------------------------------------
*/
u_short squeueput; /* Next free slot of the queue */
u_short actccbs; /* Number of allocated CCBs */
u_short queuedccbs; /* Number of CCBs in start queue*/
u_short queuedepth; /* Start queue depth */
/*----------------------------------------------------------------
** Timeout handler.
**----------------------------------------------------------------
*/
struct timer_list timer; /* Timer handler link header */
u_long lasttime;
u_long settle_time; /* Resetting the SCSI BUS */
/*----------------------------------------------------------------
** Debugging and profiling.
**----------------------------------------------------------------
*/
struct ncr_reg regdump; /* Register dump */
u_long regtime; /* Time it has been done */
/*----------------------------------------------------------------
** Miscellaneous buffers accessed by the scripts-processor.
** They shall be DWORD aligned, because they may be read or
** written with a SCR_COPY script command.
**----------------------------------------------------------------
*/
u_char msgout[8]; /* Buffer for MESSAGE OUT */
u_char msgin [8]; /* Buffer for MESSAGE IN */
u_int32 lastmsg; /* Last SCSI message sent */
u_char scratch; /* Scratch for SCSI receive */
/*----------------------------------------------------------------
** Miscellaneous configuration and status parameters.
**----------------------------------------------------------------
*/
u_char disc; /* Diconnection allowed */
u_char scsi_mode; /* Current SCSI BUS mode */
u_char order; /* Tag order to use */
u_char verbose; /* Verbosity for this controller*/
int ncr_cache; /* Used for cache test at init. */
u_long p_ncb; /* BUS address of this NCB */
/*----------------------------------------------------------------
** Command completion handling.
**----------------------------------------------------------------
*/
#ifdef SCSI_NCR_CCB_DONE_SUPPORT
struct ccb *(ccb_done[MAX_DONE]);
int ccb_done_ic;
#endif
/*----------------------------------------------------------------
** Fields that should be removed or changed.
**----------------------------------------------------------------
*/
struct ccb *ccb; /* Global CCB */
struct usrcmd user; /* Command from user */
u_char release_stage; /* Synchronisation stage on release */
#ifdef SCSI_NCR_INTEGRITY_CHECKING
/*----------------------------------------------------------------
** Fields that are used for integrity check
**----------------------------------------------------------------
*/
unsigned char check_integrity; /* Enable midlayer integ.check on
* bus scan. */
unsigned char check_integ_par; /* Set if par or Init. Det. error
* used only during integ check */
#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-chip RAM
** of 825A, 875 and 895 chips.
*/
struct script {
ncrcmd start [ 5];
ncrcmd startpos [ 1];
ncrcmd select [ 6];
ncrcmd select2 [ 9];
ncrcmd loadpos [ 4];
ncrcmd send_ident [ 9];
ncrcmd prepare [ 6];
ncrcmd prepare2 [ 7];
ncrcmd command [ 6];
ncrcmd dispatch [ 32];
ncrcmd clrack [ 4];
ncrcmd no_data [ 17];
ncrcmd status [ 8];
ncrcmd msg_in [ 2];
ncrcmd msg_in2 [ 16];
ncrcmd msg_bad [ 4];
ncrcmd setmsg [ 7];
ncrcmd cleanup [ 6];
ncrcmd complete [ 9];
ncrcmd cleanup_ok [ 8];
ncrcmd cleanup0 [ 1];
#ifndef SCSI_NCR_CCB_DONE_SUPPORT
ncrcmd signal [ 12];
#else
ncrcmd signal [ 9];
ncrcmd done_pos [ 1];
ncrcmd done_plug [ 2];
ncrcmd done_end [ 7];
#endif
ncrcmd save_dp [ 7];
ncrcmd restore_dp [ 5];
ncrcmd disconnect [ 17];
ncrcmd msg_out [ 9];
ncrcmd msg_out_done [ 7];
ncrcmd idle [ 2];
ncrcmd reselect [ 8];
ncrcmd reselected [ 8];
ncrcmd resel_dsa [ 6];
ncrcmd loadpos1 [ 4];
ncrcmd resel_lun [ 6];
ncrcmd resel_tag [ 6];
ncrcmd jump_to_nexus [ 4];
ncrcmd nexus_indirect [ 4];
ncrcmd resel_notag [ 4];
ncrcmd data_in [MAX_SCATTERL * 4];
ncrcmd data_in2 [ 4];
ncrcmd data_out [MAX_SCATTERL * 4];
ncrcmd data_out2 [ 4];
};
/*
** Script fragments which stay in main memory for all chips.
*/
struct scripth {
ncrcmd tryloop [MAX_START*2];
ncrcmd tryloop2 [ 2];
#ifdef SCSI_NCR_CCB_DONE_SUPPORT
ncrcmd done_queue [MAX_DONE*5];
ncrcmd done_queue2 [ 2];
#endif
ncrcmd select_no_atn [ 8];
ncrcmd cancel [ 4];
ncrcmd skip [ 9];
ncrcmd skip2 [ 19];
ncrcmd par_err_data_in [ 6];
ncrcmd par_err_other [ 4];
ncrcmd msg_reject [ 8];
ncrcmd msg_ign_residue [ 24];
ncrcmd msg_extended [ 10];
ncrcmd msg_ext_2 [ 10];
ncrcmd msg_wdtr [ 14];
ncrcmd send_wdtr [ 7];
ncrcmd msg_ext_3 [ 10];
ncrcmd msg_sdtr [ 14];
ncrcmd send_sdtr [ 7];
ncrcmd nego_bad_phase [ 4];
ncrcmd msg_out_abort [ 10];
ncrcmd hdata_in [MAX_SCATTERH * 4];
ncrcmd hdata_in2 [ 2];
ncrcmd hdata_out [MAX_SCATTERH * 4];
ncrcmd hdata_out2 [ 2];
ncrcmd reset [ 4];
ncrcmd aborttag [ 4];
ncrcmd abort [ 2];
ncrcmd abort_resel [ 20];
ncrcmd resend_ident [ 4];
ncrcmd clratn_go_on [ 3];
ncrcmd nxtdsp_go_on [ 1];
ncrcmd sdata_in [ 8];
ncrcmd data_io [ 18];
ncrcmd bad_identify [ 12];
ncrcmd bad_i_t_l [ 4];
ncrcmd bad_i_t_l_q [ 4];
ncrcmd bad_target [ 8];
ncrcmd bad_status [ 8];
ncrcmd start_ram [ 4];
ncrcmd start_ram0 [ 4];
ncrcmd sto_restart [ 5];
ncrcmd snooptest [ 9];
ncrcmd snoopend [ 2];
};
/*==========================================================
**
**
** Function headers.
**
**
**==========================================================
*/
static void ncr_alloc_ccb (ncb_p np, u_char tn, u_char ln);
static void ncr_complete (ncb_p np, ccb_p cp);
static void ncr_exception (ncb_p np);
static void ncr_free_ccb (ncb_p np, ccb_p cp);
static void ncr_init_ccb (ncb_p np, ccb_p cp);
static void ncr_init_tcb (ncb_p np, u_char tn);
static lcb_p ncr_alloc_lcb (ncb_p np, u_char tn, u_char ln);
static lcb_p ncr_setup_lcb (ncb_p np, u_char tn, u_char ln,
u_char *inq_data);
static void ncr_getclock (ncb_p np, int mult);
static void ncr_selectclock (ncb_p np, u_char scntl3);
static ccb_p ncr_get_ccb (ncb_p np, u_char tn, u_char ln);
static void ncr_init (ncb_p np, int reset, char * msg, u_long code);
static int ncr_int_sbmc (ncb_p np);
static int ncr_int_par (ncb_p np);
static void ncr_int_ma (ncb_p np);
static void ncr_int_sir (ncb_p np);
static void ncr_int_sto (ncb_p np);
static u_long ncr_lookup (char* id);
static void ncr_negotiate (struct ncb* np, struct tcb* tp);
static int ncr_prepare_nego(ncb_p np, ccb_p cp, u_char *msgptr);
#ifdef SCSI_NCR_INTEGRITY_CHECKING
static int ncr_ic_nego(ncb_p np, ccb_p cp, Scsi_Cmnd *cmd, u_char *msgptr);
#endif
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 * scripth);
static int ncr_scatter (ncb_p np, ccb_p cp, Scsi_Cmnd *cmd);
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_setup_tags (ncb_p np, u_char tn, u_char ln);
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 void ncr_print_msg (ccb_p cp, char *label, u_char *msg);
static int ncr_snooptest (ncb_p np);
static void ncr_timeout (ncb_p np);
static void ncr_wakeup (ncb_p np, u_long code);
static void ncr_wakeup_done (ncb_p np);
static void ncr_start_next_ccb (ncb_p np, lcb_p lp, int maxn);
static void ncr_put_start_queue(ncb_p np, ccb_p cp);
static void ncr_start_reset (ncb_p np);
static int ncr_reset_scsi_bus (ncb_p np, int enab_int, int settle_delay);
#ifdef SCSI_NCR_USER_COMMAND_SUPPORT
static void ncr_usercmd (ncb_p np);
#endif
static int ncr_attach (Scsi_Host_Template *tpnt, int unit, ncr_device *device);
static void insert_into_waiting_list(ncb_p np, Scsi_Cmnd *cmd);
static Scsi_Cmnd *retrieve_from_waiting_list(int to_remove, ncb_p np, Scsi_Cmnd *cmd);
static void process_waiting_list(ncb_p np, int sts);
#define remove_from_waiting_list(np, cmd)
retrieve_from_waiting_list(1, (np), (cmd))
#define requeue_waiting_list(np) process_waiting_list((np), DID_OK)
#define reset_waiting_list(np) process_waiting_list((np), DID_RESET)
static inline char *ncr_name (ncb_p np)
{
return np->inst_name;
}
/*==========================================================
**
**
** 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
#if 0
#define RELOC_KVAR 0x70000000
#endif
#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)))
#if 0
#define KVAR(which) (RELOC_KVAR | (which))
#endif
#if 0
#define SCRIPT_KVAR_JIFFIES (0)
#define SCRIPT_KVAR_FIRST SCRIPT_KVAR_JIFFIES
#define SCRIPT_KVAR_LAST SCRIPT_KVAR_JIFFIES
/*
* Kernel variables referenced in the scripts.
* THESE MUST ALL BE ALIGNED TO A 4-BYTE BOUNDARY.
*/
static void *script_kvars[] __initdata =
{ (void *)&jiffies };
#endif
static struct script script0 __initdata = {
/*--------------------------< START >-----------------------*/ {
/*
** This NOP will be patched with LED ON
** SCR_REG_REG (gpreg, SCR_AND, 0xfe)
*/
SCR_NO_OP,
0,
/*
** Clear SIGP.
*/
SCR_FROM_REG (ctest2),
0,
/*
** 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),
}/*-------------------------< 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, HS_SELECTING),
0,
/*
** And try to select this target.
*/
SCR_SEL_TBL_ATN ^ offsetof (struct dsb, select),
PADDR (reselect),
}/*-------------------------< SELECT2 >----------------------*/,{
/*
** 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 wins arbitration.
** Then it will execute SCRIPTS instruction until
** the next instruction that checks SCSI phase.
** Then will stop and wait for selection to be
** complete or selection time-out to occur.
** As a result the SCRIPTS instructions until
** LOADPOS + 2 should be executed in parallel with
** the SCSI core performing selection.
*/
/*
** The M_REJECT problem seems to be due to a selection
** timing problem.
** Wait immediately for the selection to complete.
** (2.5x behaves so)
*/
SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_OUT)),
0,
/*
** Next time use the next slot.
*/
SCR_COPY (4),
RADDR (temp),
PADDR (startpos),
/*
** 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),
/*
** Wait for the next phase or the selection
** to complete or time-out.
*/
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)),
PADDR (prepare),
}/*-------------------------< SEND_IDENT >----------------------*/,{
/*
** Selection complete.
** Send the IDENTIFY and SIMPLE_TAG messages
** (and the M_X_SYNC_REQ message)
*/
SCR_MOVE_TBL ^ SCR_MSG_OUT,
offsetof (struct dsb, smsg),
SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_OUT)),
PADDRH (resend_ident),
SCR_LOAD_REG (scratcha, 0x80),
0,
SCR_COPY (1),
RADDR (scratcha),
NADDR (lastmsg),
}/*-------------------------< PREPARE >----------------------*/,{
/*
** 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 >---------------------*/,{
/*
** Initialize the msgout buffer with a NOOP message.
*/
SCR_LOAD_REG (scratcha, M_NOOP),
0,
SCR_COPY (1),
RADDR (scratcha),
NADDR (msgout),
#if 0
SCR_COPY (1),
RADDR (scratcha),
NADDR (msgin),
#endif
/*
** Anticipate the COMMAND phase.
** This is the normal case for initial selection.
*/
SCR_JUMP ^ IFFALSE (WHEN (SCR_COMMAND)),
PADDR (dispatch),
}/*-------------------------< COMMAND >--------------------*/,{
/*
** ... and send the command
*/
SCR_MOVE_TBL ^ SCR_COMMAND,
offsetof (struct dsb, cmd),
/*
** If status is still HS_NEGOTIATE, negotiation failed.
** We check this here, since we want to do that
** only once.
*/
SCR_FROM_REG (HS_REG),
0,
SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)),
SIR_NEGO_FAILED,
}/*-----------------------< DISPATCH >----------------------*/,{
/*
** MSG_IN is the only phase that shall be
** entered at least once for each (re)selection.
** So we test it first.
*/
SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN)),
PADDR (msg_in),
SCR_RETURN ^ IFTRUE (IF (SCR_DATA_OUT)),
0,
/*
** DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 4.
** Possible data corruption during Memory Write and Invalidate.
** This work-around resets the addressing logic prior to the
** start of the first MOVE of a DATA IN phase.
** (See README.ncr53c8xx for more information)
*/
SCR_JUMPR ^ IFFALSE (IF (SCR_DATA_IN)),
20,
SCR_COPY (4),
RADDR (scratcha),
RADDR (scratcha),
SCR_RETURN,
0,
SCR_JUMP ^ IFTRUE (IF (SCR_STATUS)),
PADDR (status),
SCR_JUMP ^ IFTRUE (IF (SCR_COMMAND)),
PADDR (command),
SCR_JUMP ^ IFTRUE (IF (SCR_MSG_OUT)),
PADDR (msg_out),
/*
** 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),
}/*-------------------------< CLRACK >----------------------*/,{
/*
** Terminate possible pending message phase.
*/
SCR_CLR (SCR_ACK),
0,
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),
}/*-------------------------< STATUS >--------------------*/,{
/*
** get the status
*/
SCR_MOVE_ABS (1) ^ SCR_STATUS,
NADDR (scratch),
/*
** save status to scsi_status.
** mark as complete.
*/
SCR_TO_REG (SS_REG),
0,
SCR_LOAD_REG (HS_REG, HS_COMPLETE),
0,
SCR_JUMP,
PADDR (dispatch),
}/*-------------------------< 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]),
}/*-------------------------< MSG_IN2 >--------------------*/,{
/*
** Handle this message.
*/
SCR_JUMP ^ IFTRUE (DATA (M_COMPLETE)),
PADDR (complete),
SCR_JUMP ^ IFTRUE (DATA (M_DISCONNECT)),
PADDR (disconnect),
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_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,
}/*-------------------------< SETMSG >----------------------*/,{
SCR_COPY (1),
RADDR (scratcha),
NADDR (msgout),
SCR_SET (SCR_ATN),
0,
SCR_JUMP,
PADDR (clrack),
}/*-------------------------< 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 (start),
/*
** dsa is valid.
** complete the cleanup.
*/
SCR_JUMP,
PADDR (cleanup_ok),
}/*-------------------------< COMPLETE >-----------------*/,{
/*
** Complete message.
**
** Copy TEMP register to LASTP in header.
*/
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_OK >----------------*/,{
/*
** Save host status to header.
*/
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,
}/*-------------------------< SIGNAL >----------------------*/,{
/*
** if job not completed ...
*/
SCR_FROM_REG (HS_REG),
0,
/*
** ... start the next command.
*/
SCR_JUMP ^ IFTRUE (MASK (0, (HS_DONEMASK|HS_SKIPMASK))),
PADDR(start),
/*
** If command resulted in not GOOD status,
** call the C code if needed.
*/
SCR_FROM_REG (SS_REG),
0,
SCR_CALL ^ IFFALSE (DATA (S_GOOD)),
PADDRH (bad_status),
#ifndef SCSI_NCR_CCB_DONE_SUPPORT
/*
** ... signal completion to the host
*/
SCR_INT_FLY,
0,
/*
** Auf zu neuen Schandtaten!
*/
SCR_JUMP,
PADDR(start),
#else /* defined SCSI_NCR_CCB_DONE_SUPPORT */
/*
** ... signal completion to the host
*/
SCR_JUMP,
}/*------------------------< DONE_POS >---------------------*/,{
PADDRH (done_queue),
}/*------------------------< DONE_PLUG >--------------------*/,{
SCR_INT,
SIR_DONE_OVERFLOW,
}/*------------------------< DONE_END >---------------------*/,{
SCR_INT_FLY,
0,
SCR_COPY (4),
RADDR (temp),
PADDR (done_pos),
SCR_JUMP,
PADDR (start),
#endif /* SCSI_NCR_CCB_DONE_SUPPORT */
}/*-------------------------< SAVE_DP >------------------*/,{
/*
** SAVE_DP message:
** Copy TEMP register to SAVEP in header.
*/
SCR_COPY (4),
RADDR (temp),
NADDR (header.savep),
SCR_CLR (SCR_ACK),
0,
SCR_JUMP,
PADDR (dispatch),
}/*-------------------------< 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 >---------------*/,{
/*
** 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,
/*
** Status is: DISCONNECTED.
*/
SCR_LOAD_REG (HS_REG, HS_DISCONNECT),
0,
/*
** If QUIRK_AUTOSAVE is set,
** do an "save pointer" operation.
*/
SCR_FROM_REG (QU_REG),
0,
SCR_JUMP ^ IFFALSE (MASK (QUIRK_AUTOSAVE, QUIRK_AUTOSAVE)),
PADDR (cleanup_ok),
/*
** like SAVE_DP message:
** Copy TEMP register to SAVEP in header.
*/
SCR_COPY (4),
RADDR (temp),
NADDR (header.savep),
SCR_JUMP,
PADDR (cleanup_ok),
}/*-------------------------< MSG_OUT >-------------------*/,{
/*
** The target requests a message.
*/
SCR_MOVE_ABS (1) ^ SCR_MSG_OUT,
NADDR (msgout),
SCR_COPY (1),
NADDR (msgout),
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),
}/*-------------------------< IDLE >------------------------*/,{
/*
** Nothing to do?
** Wait for reselect.
** This NOP will be patched with LED OFF
** SCR_REG_REG (gpreg, SCR_OR, 0x01)
*/
SCR_NO_OP,
0,
}/*-------------------------< RESELECT >--------------------*/,{
/*
** make the DSA invalid.
*/
SCR_LOAD_REG (dsa, 0xff),
0,
SCR_CLR (SCR_TRG),
0,
SCR_LOAD_REG (HS_REG, HS_IN_RESELECT),
0,
/*
** Sleep waiting for a reselection.
** If SIGP is set, special treatment.
**
** Zu allem bereit ..
*/
SCR_WAIT_RESEL,
PADDR(start),
}/*-------------------------< RESELECTED >------------------*/,{
/*
** 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 (sdid),
0,
SCR_JUMP,
NADDR (jump_tcb),
}/*-------------------------< RESEL_DSA >-------------------*/,{
/*
** Ack the IDENTIFY or TAG previously received.
*/
SCR_CLR (SCR_ACK),
0,
/*
** 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 (loadpos1),
/*
** then we do the actual copy.
*/
SCR_COPY (sizeof (struct head)),
/*
** continued after the next label ...
*/
}/*-------------------------< LOADPOS1 >-------------------*/,{
0,
NADDR (header),
/*
** The DSA contains the data structure address.
*/
SCR_JUMP,
PADDR (prepare),
}/*-------------------------< RESEL_LUN >-------------------*/,{
/*
** come back to this point
** to get an IDENTIFY message
** Wait for a msg_in phase.
*/
SCR_INT ^ IFFALSE (WHEN (SCR_MSG_IN)),
SIR_RESEL_NO_MSG_IN,
/*
** message phase.
** Read the data directly from the BUS DATA lines.
** This helps to support very old SCSI devices that
** may reselect without sending an IDENTIFY.
*/
SCR_FROM_REG (sbdl),
0,
/*
** It should be an Identify message.
*/
SCR_RETURN,
0,
}/*-------------------------< RESEL_TAG >-------------------*/,{
/*
** Read IDENTIFY + SIMPLE + TAG using a single MOVE.
** Agressive optimization, is'nt it?
** No need to test the SIMPLE TAG message, since the
** driver only supports conformant devices for tags. ;-)
*/
SCR_MOVE_ABS (3) ^ SCR_MSG_IN,
NADDR (msgin),
/*
** Read the TAG from the SIDL.
** Still an aggressive optimization. ;-)
** Compute the CCB indirect jump address which
** is (#TAG*2 & 0xfc) due to tag numbering using
** 1,3,5..MAXTAGS*2+1 actual values.
*/
SCR_REG_SFBR (sidl, SCR_SHL, 0),
0,
SCR_SFBR_REG (temp, SCR_AND, 0xfc),
0,
}/*-------------------------< JUMP_TO_NEXUS >-------------------*/,{
SCR_COPY_F (4),
RADDR (temp),
PADDR (nexus_indirect),
SCR_COPY (4),
}/*-------------------------< NEXUS_INDIRECT >-------------------*/,{
0,
RADDR (temp),
SCR_RETURN,
0,
}/*-------------------------< RESEL_NOTAG >-------------------*/,{
/*
** No tag expected.
** Read an throw away the IDENTIFY.
*/
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
NADDR (msgin),
SCR_JUMP,
PADDR (jump_to_nexus),
}/*-------------------------< DATA_IN >--------------------*/,{
/*
** Because the size depends on the
** #define MAX_SCATTERL parameter,
** it is filled in at runtime.
**
** ##===========< i=0; i<MAX_SCATTERL >=========
** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)),
** || PADDR (dispatch),
** || SCR_MOVE_TBL ^ SCR_DATA_IN,
** || offsetof (struct dsb, data[ i]),
** ##==========================================
**
**---------------------------------------------------------
*/
0
}/*-------------------------< DATA_IN2 >-------------------*/,{
SCR_CALL,
PADDR (dispatch),
SCR_JUMP,
PADDR (no_data),
}/*-------------------------< DATA_OUT >--------------------*/,{
/*
** Because the size depends on the
** #define MAX_SCATTERL parameter,
** it is filled in at runtime.
**
** ##===========< i=0; i<MAX_SCATTERL >=========
** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)),
** || PADDR (dispatch),
** || SCR_MOVE_TBL ^ SCR_DATA_OUT,
** || offsetof (struct dsb, data[ i]),
** ##==========================================
**
**---------------------------------------------------------
*/
0
}/*-------------------------< DATA_OUT2 >-------------------*/,{
SCR_CALL,
PADDR (dispatch),
SCR_JUMP,
PADDR (no_data),
}/*--------------------------------------------------------*/
};
static struct scripth scripth0 __initdata = {
/*-------------------------< TRYLOOP >---------------------*/{
/*
** Start the next entry.
** Called addresses point to the launch script in the CCB.
** They are patched by the main processor.
**
** Because the size depends on the
** #define MAX_START parameter, it is filled
** in at runtime.
**
**-----------------------------------------------------------
**
** ##===========< I=0; i<MAX_START >===========
** || SCR_CALL,
** || PADDR (idle),
** ##==========================================
**
**-----------------------------------------------------------
*/
0
}/*------------------------< TRYLOOP2 >---------------------*/,{
SCR_JUMP,
PADDRH(tryloop),
#ifdef SCSI_NCR_CCB_DONE_SUPPORT
}/*------------------------< DONE_QUEUE >-------------------*/,{
/*
** Copy the CCB address to the next done entry.
** Because the size depends on the
** #define MAX_DONE parameter, it is filled
** in at runtime.
**
**-----------------------------------------------------------
**
** ##===========< I=0; i<MAX_DONE >===========
** || SCR_COPY (sizeof(ccb_p)),
** || NADDR (header.cp),
** || NADDR (ccb_done[i]),
** || SCR_CALL,
** || PADDR (done_end),
** ##==========================================
**
**-----------------------------------------------------------
*/
0
}/*------------------------< DONE_QUEUE2 >------------------*/,{
SCR_JUMP,
PADDRH (done_queue),
#endif /* SCSI_NCR_CCB_DONE_SUPPORT */
}/*------------------------< SELECT_NO_ATN >-----------------*/,{
/*
** Set Initiator mode.
** And try to select this target without ATN.
*/
SCR_CLR (SCR_TRG),
0,
SCR_LOAD_REG (HS_REG, HS_SELECTING),
0,
SCR_SEL_TBL ^ offsetof (struct dsb, select),
PADDR (reselect),
SCR_JUMP,
PADDR (select2),
}/*-------------------------< CANCEL >------------------------*/,{
SCR_LOAD_REG (scratcha, HS_ABORTED),
0,
SCR_JUMPR,
8,
}/*-------------------------< SKIP >------------------------*/,{
SCR_LOAD_REG (scratcha, 0),
0,
/*
** This entry has been canceled.
** Next time use the next slot.
*/
SCR_COPY (4),
RADDR (temp),
PADDR (startpos),
/*
** 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),
PADDRH (skip2),
/*
** then we do the actual copy.
*/
SCR_COPY (sizeof (struct head)),
/*
** continued after the next label ...
*/
}/*-------------------------< SKIP2 >---------------------*/,{
0,
NADDR (header),
/*
** Initialize the status registers
*/
SCR_COPY (4),
NADDR (header.status),
RADDR (scr0),
/*
** Force host status.
*/
SCR_FROM_REG (scratcha),
0,
SCR_JUMPR ^ IFFALSE (MASK (0, HS_DONEMASK)),
16,
SCR_REG_REG (HS_REG, SCR_OR, HS_SKIPMASK),
0,
SCR_JUMPR,
8,
SCR_TO_REG (HS_REG),
0,
SCR_LOAD_REG (SS_REG, S_GOOD),
0,
SCR_JUMP,
PADDR (cleanup_ok),
},/*-------------------------< PAR_ERR_DATA_IN >---------------*/{
/*
** Ignore all data in byte, until next phase
*/
SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_IN)),
PADDRH (par_err_other),
SCR_MOVE_ABS (1) ^ SCR_DATA_IN,
NADDR (scratch),
SCR_JUMPR,
-24,
},/*-------------------------< PAR_ERR_OTHER >------------------*/{
/*
** count it.
*/
SCR_REG_REG (PS_REG, SCR_ADD, 0x01),
0,
/*
** jump to dispatcher.
*/
SCR_JUMP,
PADDR (dispatch),
}/*-------------------------< MSG_REJECT >---------------*/,{
/*
** If a negotiation was in progress,
** negotiation failed.
** Otherwise, let the C code print
** some message.
*/
SCR_FROM_REG (HS_REG),
0,
SCR_INT ^ IFFALSE (DATA (HS_NEGOTIATE)),
SIR_REJECT_RECEIVED,
SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)),
SIR_NEGO_FAILED,
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]),
/*
** 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]),
/*
*/
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]),
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]),
/*
** 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_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)),
PADDRH (nego_bad_phase),
}/*-------------------------< SEND_WDTR >----------------*/,{
/*
** Send the M_X_WIDE_REQ
*/
SCR_MOVE_ABS (4) ^ SCR_MSG_OUT,
NADDR (msgout),
SCR_COPY (1),
NADDR (msgout),
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]),
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]),
/*
** 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_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)),
PADDRH (nego_bad_phase),
}/*-------------------------< SEND_SDTR >-------------*/,{
/*
** Send the M_X_SYNC_REQ
*/
SCR_MOVE_ABS (5) ^ SCR_MSG_OUT,
NADDR (msgout),
SCR_COPY (1),
NADDR (msgout),
NADDR (lastmsg),
SCR_JUMP,
PADDR (msg_out_done),
}/*-------------------------< NEGO_BAD_PHASE >------------*/,{
SCR_INT,
SIR_NEGO_PROTO,
SCR_JUMP,
PADDR (dispatch),
}/*-------------------------< MSG_OUT_ABORT >-------------*/,{
/*
** After ABORT message,
**
** expect an immediate disconnect, ...
*/
SCR_REG_REG (scntl2, SCR_AND, 0x7f),
0,
SCR_CLR (SCR_ACK|SCR_ATN),
0,
SCR_WAIT_DISC,
0,
/*
** ... and set the status to "ABORTED"
*/
SCR_LOAD_REG (HS_REG, HS_ABORTED),
0,
SCR_JUMP,
PADDR (cleanup),
}/*-------------------------< HDATA_IN >-------------------*/,{
/*
** Because the size depends on the
** #define MAX_SCATTERH parameter,
** it is filled in at runtime.
**
** ##==< i=MAX_SCATTERL; i<MAX_SCATTERL+MAX_SCATTERH >==
** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)),
** || PADDR (dispatch),
** || SCR_MOVE_TBL ^ SCR_DATA_IN,
** || offsetof (struct dsb, data[ i]),
** ##===================================================
**
**---------------------------------------------------------
*/
0
}/*-------------------------< HDATA_IN2 >------------------*/,{
SCR_JUMP,
PADDR (data_in),
}/*-------------------------< HDATA_OUT >-------------------*/,{
/*
** Because the size depends on the
** #define MAX_SCATTERH parameter,
** it is filled in at runtime.
**
** ##==< i=MAX_SCATTERL; i<MAX_SCATTERL+MAX_SCATTERH >==
** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)),
** || PADDR (dispatch),
** || SCR_MOVE_TBL ^ SCR_DATA_OUT,
** || offsetof (struct dsb, data[ i]),
** ##===================================================
**
**---------------------------------------------------------
*/
0
}/*-------------------------< HDATA_OUT2 >------------------*/,{
SCR_JUMP,
PADDR (data_out),
}/*-------------------------< RESET >----------------------*/,{
/*
** Send a M_RESET message if bad IDENTIFY
** received on reselection.
*/
SCR_LOAD_REG (scratcha, M_ABORT_TAG),
0,
SCR_JUMP,
PADDRH (abort_resel),
}/*-------------------------< ABORTTAG >-------------------*/,{
/*
** Abort a wrong tag received on reselection.
*/
SCR_LOAD_REG (scratcha, M_ABORT_TAG),
0,
SCR_JUMP,
PADDRH (abort_resel),
}/*-------------------------< ABORT >----------------------*/,{
/*
** Abort a reselection when no active CCB.
*/
SCR_LOAD_REG (scratcha, M_ABORT),
0,
}/*-------------------------< ABORT_RESEL >----------------*/,{
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),
NADDR (msgout),
NADDR (lastmsg),
SCR_CLR (SCR_ACK|SCR_ATN),
0,
SCR_WAIT_DISC,
0,
SCR_JUMP,
PADDR (start),
}/*-------------------------< RESEND_IDENT >-------------------*/,{
/*
** The target stays in MSG OUT phase after having acked
** Identify [+ Tag [+ Extended message ]]. Targets shall
** behave this way on parity error.
** We must send it again all the messages.
*/
SCR_SET (SCR_ATN), /* Shall be asserted 2 deskew delays before the */
0, /* 1rst ACK = 90 ns. Hope the NCR is'nt too fast */
SCR_JUMP,
PADDR (send_ident),
}/*-------------------------< CLRATN_GO_ON >-------------------*/,{
SCR_CLR (SCR_ATN),
0,
SCR_JUMP,
}/*-------------------------< NXTDSP_GO_ON >-------------------*/,{
0,
}/*-------------------------< SDATA_IN >-------------------*/,{
SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)),
PADDR (dispatch),
SCR_MOVE_TBL ^ SCR_DATA_IN,
offsetof (struct dsb, sense),
SCR_CALL,
PADDR (dispatch),
SCR_JUMP,
PADDR (no_data),
}/*-------------------------< DATA_IO >--------------------*/,{
/*
** We jump here if the data direction was unknown at the
** time we had to queue the command to the scripts processor.
** Pointers had been set as follow in this situation:
** savep --> DATA_IO
** lastp --> start pointer when DATA_IN
** goalp --> goal pointer when DATA_IN
** wlastp --> start pointer when DATA_OUT
** wgoalp --> goal pointer when DATA_OUT
** This script sets savep/lastp/goalp according to the
** direction chosen by the target.
*/
SCR_JUMPR ^ IFTRUE (WHEN (SCR_DATA_OUT)),
32,
/*
** Direction is DATA IN.
** Warning: we jump here, even when phase is DATA OUT.
*/
SCR_COPY (4),
NADDR (header.lastp),
NADDR (header.savep),
/*
** Jump to the SCRIPTS according to actual direction.
*/
SCR_COPY (4),
NADDR (header.savep),
RADDR (temp),
SCR_RETURN,
0,
/*
** Direction is DATA OUT.
*/
SCR_COPY (4),
NADDR (header.wlastp),
NADDR (header.lastp),
SCR_COPY (4),
NADDR (header.wgoalp),
NADDR (header.goalp),
SCR_JUMPR,
-64,
}/*-------------------------< BAD_IDENTIFY >---------------*/,{
/*
** If message phase but not an IDENTIFY,
** get some help from the C code.
** Old SCSI device may behave so.
*/
SCR_JUMPR ^ IFTRUE (MASK (0x80, 0x80)),
16,
SCR_INT,
SIR_RESEL_NO_IDENTIFY,
SCR_JUMP,
PADDRH (reset),
/*
** Message is an IDENTIFY, but lun is unknown.
** Read the message, since we got it directly
** from the SCSI BUS data lines.
** Signal problem to C code for logging the event.
** Send a M_ABORT to clear all pending tasks.
*/
SCR_INT,
SIR_RESEL_BAD_LUN,
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
NADDR (msgin),
SCR_JUMP,
PADDRH (abort),
}/*-------------------------< BAD_I_T_L >------------------*/,{
/*
** We donnot have a task for that I_T_L.
** Signal problem to C code for logging the event.
** Send a M_ABORT message.
*/
SCR_INT,
SIR_RESEL_BAD_I_T_L,
SCR_JUMP,
PADDRH (abort),
}/*-------------------------< BAD_I_T_L_Q >----------------*/,{
/*
** We donnot have a task that matches the tag.
** Signal problem to C code for logging the event.
** Send a M_ABORTTAG message.
*/
SCR_INT,
SIR_RESEL_BAD_I_T_L_Q,
SCR_JUMP,
PADDRH (aborttag),
}/*-------------------------< BAD_TARGET >-----------------*/,{
/*
** We donnot know the target that reselected us.
** Grab the first message if any (IDENTIFY).
** Signal problem to C code for logging the event.
** M_RESET message.
*/
SCR_INT,
SIR_RESEL_BAD_TARGET,
SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)),
8,
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
NADDR (msgin),
SCR_JUMP,
PADDRH (reset),
}/*-------------------------< BAD_STATUS >-----------------*/,{
/*
** If command resulted in either QUEUE FULL,
** CHECK CONDITION or COMMAND TERMINATED,
** call the C code.
*/
SCR_INT ^ IFTRUE (DATA (S_QUEUE_FULL)),
SIR_BAD_STATUS,
SCR_INT ^ IFTRUE (DATA (S_CHECK_COND)),
SIR_BAD_STATUS,
SCR_INT ^ IFTRUE (DATA (S_TERMINATED)),
SIR_BAD_STATUS,
SCR_RETURN,
0,
}/*-------------------------< START_RAM >-------------------*/,{
/*
** Load the script into on-chip RAM,
** and jump to start point.
*/
SCR_COPY_F (4),
RADDR (scratcha),
PADDRH (start_ram0),
SCR_COPY (sizeof (struct script)),
}/*-------------------------< START_RAM0 >--------------------*/,{
0,
PADDR (start),
SCR_JUMP,
PADDR (start),
}/*-------------------------< STO_RESTART >-------------------*/,{
/*
**
** Repair start queue (e.g. next time use the next slot)
** and jump to start point.
*/
SCR_COPY (4),
RADDR (temp),
PADDR (startpos),
SCR_JUMP,
PADDR (start),
}/*-------------------------< SNOOPTEST >-------------------*/,{
/*
** Read the variable.
*/
SCR_COPY (4),
NADDR(ncr_cache),
RADDR (scratcha),
/*
** Write the variable.
*/
SCR_COPY (4),
RADDR (temp),
NADDR(ncr_cache),
/*
** Read back the variable.
*/
SCR_COPY (4),
NADDR(ncr_cache),
RADDR (temp),
}/*-------------------------< SNOOPEND >-------------------*/,{
/*
** And stop.
*/
SCR_INT,
99,
}/*--------------------------------------------------------*/
};
/*==========================================================
**
**
** Fill in #define dependent parts of the script
**
**
**==========================================================
*/
void __init 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_CALL;
*p++ =PADDR (idle);
};
assert ((u_long)p == (u_long)&scrh->tryloop + sizeof (scrh->tryloop));
#ifdef SCSI_NCR_CCB_DONE_SUPPORT
p = scrh->done_queue;
for (i = 0; i<MAX_DONE; i++) {
*p++ =SCR_COPY (sizeof(ccb_p));
*p++ =NADDR (header.cp);
*p++ =NADDR (ccb_done[i]);
*p++ =SCR_CALL;
*p++ =PADDR (done_end);
}
assert ((u_long)p ==(u_long)&scrh->done_queue+sizeof(scrh->done_queue));
#endif /* SCSI_NCR_CCB_DONE_SUPPORT */
p = scrh->hdata_in;
for (i=0; i<MAX_SCATTERH; i++) {
*p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN));
*p++ =PADDR (dispatch);
*p++ =SCR_MOVE_TBL ^ SCR_DATA_IN;
*p++ =offsetof (struct dsb, data[i]);
};
assert ((u_long)p == (u_long)&scrh->hdata_in + sizeof (scrh->hdata_in));
p = scr->data_in;
for (i=MAX_SCATTERH; i<MAX_SCATTERH+MAX_SCATTERL; i++) {
*p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN));
*p++ =PADDR (dispatch);
*p++ =SCR_MOVE_TBL ^ SCR_DATA_IN;
*p++ =offsetof (struct dsb, data[i]);
};
assert ((u_long)p == (u_long)&scr->data_in + sizeof (scr->data_in));
p = scrh->hdata_out;
for (i=0; i<MAX_SCATTERH; 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]);
};
assert ((u_long)p==(u_long)&scrh->hdata_out + sizeof (scrh->hdata_out));
p = scr->data_out;
for (i=MAX_SCATTERH; i<MAX_SCATTERH+MAX_SCATTERL; 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]);
};
assert ((u_long)p == (u_long)&scr->data_out + sizeof (scr->data_out));
}
/*==========================================================
**
**
** Copy and rebind a script.
**
**
**==========================================================
*/
static void __init
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;
int opchanged = 0;
start = src;
end = src + len/4;
while (src < end) {
opcode = *src++;
*dst++ = cpu_to_scr(opcode);
/*
** 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) {
printk (KERN_ERR "%s: ERROR0 IN SCRIPT at %d.n",
ncr_name(np), (int) (src-start-1));
MDELAY (1000);
};
if (DEBUG_FLAGS & DEBUG_SCRIPT)
printk (KERN_DEBUG "%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];
#ifdef RELOC_KVAR
if ((tmp1 & RELOC_MASK) == RELOC_KVAR)
tmp1 = 0;
#endif
tmp2 = src[1];
#ifdef RELOC_KVAR
if ((tmp2 & RELOC_MASK) == RELOC_KVAR)
tmp2 = 0;
#endif
if ((tmp1 ^ tmp2) & 3) {
printk (KERN_ERR"%s: ERROR1 IN SCRIPT at %d.n",
ncr_name(np), (int) (src-start-1));
MDELAY (1000);
}
/*
** If PREFETCH feature not enabled, remove
** the NO FLUSH bit if present.
*/
if ((opcode & SCR_NO_FLUSH) && !(np->features & FE_PFEN)) {
dst[-1] = cpu_to_scr(opcode & ~SCR_NO_FLUSH);
++opchanged;
}
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) + np->p_ncb;
break;
#ifdef RELOC_KVAR
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;
#endif
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 %xn", old);
break;
}
*dst++ = cpu_to_scr(new);
}
} else
*dst++ = cpu_to_scr(*src++);
};
}
/*==========================================================
**
**
** Auto configuration: attach and init a host adapter.
**
**
**==========================================================
*/
/*
** Linux host data structure
**
** The script area is allocated in the host data structure
** because kmalloc() returns NULL during scsi initialisations
** with Linux 1.2.X
*/
struct host_data {
struct ncb *ncb;
};
/*
** Print something which allows to retrieve the controller type, unit,
** target, lun concerned by a kernel message.
*/
static void PRINT_TARGET(ncb_p np, int target)
{
printk(KERN_INFO "%s-<%d,*>: ", ncr_name(np), target);
}
static void PRINT_LUN(ncb_p np, int target, int lun)
{
printk(KERN_INFO "%s-<%d,%d>: ", ncr_name(np), target, lun);
}
static void PRINT_ADDR(Scsi_Cmnd *cmd)
{
struct host_data *host_data = (struct host_data *) cmd->host->hostdata;
PRINT_LUN(host_data->ncb, cmd->target, cmd->lun);
}
/*==========================================================
**
** 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};
/*===============================================================
**
** Prepare io register values used by ncr_init() according
** to selected and supported features.
**
** 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 inline 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);
}
}
#ifdef SCSI_NCR_NVRAM_SUPPORT
/*
** Get target set-up from Symbios format NVRAM.
*/
static void __init
ncr_Symbios_setup_target(ncb_p np, int target, Symbios_nvram *nvram)
{
tcb_p tp = &np->target[target];
Symbios_target *tn = &nvram->target[target];
tp->usrsync = tn->sync_period ? (tn->sync_period + 3) / 4 : 255;
tp->usrwide = tn->bus_width == 0x10 ? 1 : 0;
tp->usrtags =
(tn->flags & SYMBIOS_QUEUE_TAGS_ENABLED)? MAX_TAGS : 0;
if (!(tn->flags & SYMBIOS_DISCONNECT_ENABLE))
tp->usrflag |= UF_NODISC;
if (!(tn->flags & SYMBIOS_SCAN_AT_BOOT_TIME))
tp->usrflag |= UF_NOSCAN;
}
/*
** Get target set-up from Tekram format NVRAM.
*/
static void __init
ncr_Tekram_setup_target(ncb_p np, int target, Tekram_nvram *nvram)
{
tcb_p tp = &np->target[target];
struct Tekram_target *tn = &nvram->target[target];
int i;
if (tn->flags & TEKRAM_SYNC_NEGO) {
i = tn->sync_index & 0xf;
tp->usrsync = Tekram_sync[i];
}
tp->usrwide = (tn->flags & TEKRAM_WIDE_NEGO) ? 1 : 0;
if (tn->flags & TEKRAM_TAGGED_COMMANDS) {
tp->usrtags = 2 << nvram->max_tags_index;
}
if (!(tn->flags & TEKRAM_DISCONNECT_ENABLE))
tp->usrflag = UF_NODISC;
/* If any device does not support parity, we will not use this option */
if (!(tn->flags & TEKRAM_PARITY_CHECK))
np->rv_scntl0 &= ~0x0a; /* SCSI parity checking disabled */
}
#endif /* SCSI_NCR_NVRAM_SUPPORT */
static int __init ncr_prepare_setting(ncb_p np, ncr_nvram *nvram)
{
u_char burst_max;
u_long period;
int i;
/*
** Save assumed BIOS setting
*/
np->sv_scntl0 = INB(nc_scntl0) & 0x0a;
np->sv_scntl3 = INB(nc_scntl3) & 0x07;
np->sv_dmode = INB(nc_dmode) & 0xce;
np->sv_dcntl = INB(nc_dcntl) & 0xa8;
np->sv_ctest3 = INB(nc_ctest3) & 0x01;
np->sv_ctest4 = INB(nc_ctest4) & 0x80;
np->sv_ctest5 = INB(nc_ctest5) & 0x24;
np->sv_gpcntl = INB(nc_gpcntl);
np->sv_stest2 = INB(nc_stest2) & 0x20;
np->sv_stest4 = INB(nc_stest4);
/*
** Wide ?
*/
np->maxwide = (np->features & FE_WIDE)? 1 : 0;
/*
* Guess the frequency of the chip's clock.
*/
if (np->features & (FE_ULTRA3 | FE_ULTRA2))
np->clock_khz = 160000;
else if (np->features & FE_ULTRA)
np->clock_khz = 80000;
else
np->clock_khz = 40000;
/*
* Get the clock multiplier factor.
*/
if (np->features & FE_QUAD)
np->multiplier = 4;
else if (np->features & FE_DBLR)
np->multiplier = 2;
else
np->multiplier = 1;
/*
* Measure SCSI clock frequency for chips
* it may vary from assumed one.
*/
if (np->features & FE_VARCLK)
ncr_getclock(np, np->multiplier);
/*
* Divisor to be used for async (timer pre-scaler).
*/
i = np->clock_divn - 1;
while (--i >= 0) {
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;
/*
** Prepare initial value of other IO registers
*/
#if defined SCSI_NCR_TRUST_BIOS_SETTING
np->rv_scntl0 = np->sv_scntl0;
np->rv_dmode = np->sv_dmode;
np->rv_dcntl = np->sv_dcntl;
np->rv_ctest3 = np->sv_ctest3;
np->rv_ctest4 = np->sv_ctest4;
np->rv_ctest5 = np->sv_ctest5;
burst_max = burst_code(np->sv_dmode, np->sv_ctest4, np->sv_ctest5);
#else
/*
** Select burst length (dwords)
*/
burst_max = driver_setup.burst_max;
if (burst_max == 255)
burst_max = burst_code(np->sv_dmode, np->sv_ctest4, np->sv_ctest5);
if (burst_max > 7)
burst_max = 7;
if (burst_max > np->maxburst)
burst_max = np->maxburst;
/*
** Select all supported special features
*/
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_PFEN)
np->rv_dcntl |= PFEN; /* Prefetch Enable */
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_DFS)
np->rv_ctest5 |= DFS; /* Dma Fifo Size */
/*
** Select some other
*/
if (driver_setup.master_parity)
np->rv_ctest4 |= MPEE; /* Master parity checking */
if (driver_setup.scsi_parity)
np->rv_scntl0 |= 0x0a; /* full arb., ena parity, par->ATN */
#ifdef SCSI_NCR_NVRAM_SUPPORT
/*
** Get parity checking, host ID and verbose mode from NVRAM
**/
if (nvram) {
switch(nvram->type) {
case SCSI_NCR_TEKRAM_NVRAM:
np->myaddr = nvram->data.Tekram.host_id & 0x0f;
break;
case SCSI_NCR_SYMBIOS_NVRAM:
if (!(nvram->data.Symbios.flags & SYMBIOS_PARITY_ENABLE))
np->rv_scntl0 &= ~0x0a;
np->myaddr = nvram->data.Symbios.host_id & 0x0f;
if (nvram->data.Symbios.flags & SYMBIOS_VERBOSE_MSGS)
np->verbose += 1;
break;
}
}
#endif
/*
** Get SCSI addr of host adapter (set by bios?).
*/
if (np->myaddr == 255) {
np->myaddr = INB(nc_scid) & 0x07;
if (!np->myaddr)
np->myaddr = SCSI_NCR_MYADDR;
}
#endif /* SCSI_NCR_TRUST_BIOS_SETTING */
/*
* Prepare initial io register bits for burst length
*/
ncr_init_burst(np, burst_max);
/*
** Set SCSI BUS mode.
**
** - ULTRA2 chips (895/895A/896) report the current
** BUS mode through the STEST4 IO register.
** - For previous generation chips (825/825A/875),
** user has to tell us how to check against HVD,
** since a 100% safe algorithm is not possible.
*/
np->scsi_mode = SMODE_SE;
if (np->features & FE_ULTRA2)
np->scsi_mode = (np->sv_stest4 & SMODE);
else if (np->features & FE_DIFF) {
switch(driver_setup.diff_support) {
case 4: /* Trust previous settings if present, then GPIO3 */
if (np->sv_scntl3) {
if (np->sv_stest2 & 0x20)
np->scsi_mode = SMODE_HVD;
break;
}
case 3: /* SYMBIOS controllers report HVD through GPIO3 */
if (nvram && nvram->type != SCSI_NCR_SYMBIOS_NVRAM)
break;
if (INB(nc_gpreg) & 0x08)
break;
case 2: /* Set HVD unconditionally */
np->scsi_mode = SMODE_HVD;
case 1: /* Trust previous settings for HVD */
if (np->sv_stest2 & 0x20)
np->scsi_mode = SMODE_HVD;
break;
default:/* Don't care about HVD */
break;
}
}
if (np->scsi_mode == SMODE_HVD)
np->rv_stest2 |= 0x20;
/*
** Set LED support from SCRIPTS.
** Ignore this feature for boards known to use a
** specific GPIO wiring and for the 895A or 896
** that drive the LED directly.
** Also probe initial setting of GPIO0 as output.
*/
if ((driver_setup.led_pin ||
(nvram && nvram->type == SCSI_NCR_SYMBIOS_NVRAM)) &&
!(np->features & FE_LEDC) && !(np->sv_gpcntl & 0x01))
np->features |= FE_LED0;
/*
** Set irq mode.
*/
switch(driver_setup.irqm & 3) {
case 2:
np->rv_dcntl |= IRQM;
break;
case 1:
np->rv_dcntl |= (np->sv_dcntl & IRQM);
break;
default:
break;
}
/*
** Configure targets according to driver setup.
** If NVRAM present get targets setup from NVRAM.
** Allow to override sync, wide and NOSCAN from
** boot command line.
*/
for (i = 0 ; i < MAX_TARGET ; i++) {
tcb_p tp = &np->target[i];
tp->usrsync = 255;
#ifdef SCSI_NCR_NVRAM_SUPPORT
if (nvram) {
switch(nvram->type) {
case SCSI_NCR_TEKRAM_NVRAM:
ncr_Tekram_setup_target(np, i, &nvram->data.Tekram);
break;
case SCSI_NCR_SYMBIOS_NVRAM:
ncr_Symbios_setup_target(np, i, &nvram->data.Symbios);
break;
}
if (driver_setup.use_nvram & 0x2)
tp->usrsync = driver_setup.default_sync;
if (driver_setup.use_nvram & 0x4)
tp->usrwide = driver_setup.max_wide;
if (driver_setup.use_nvram & 0x8)
tp->usrflag &= ~UF_NOSCAN;
}
else {
#else
if (1) {
#endif
tp->usrsync = driver_setup.default_sync;
tp->usrwide = driver_setup.max_wide;
tp->usrtags = MAX_TAGS;
if (!driver_setup.disconnection)
np->target[i].usrflag = UF_NODISC;
}
}
/*
** Announce all that stuff to user.
*/
i = nvram ? nvram->type : 0;
printk(KERN_INFO "%s: %sID %d, Fast-%d%s%sn", ncr_name(np),
i == SCSI_NCR_SYMBIOS_NVRAM ? "Symbios format NVRAM, " :
(i == SCSI_NCR_TEKRAM_NVRAM ? "Tekram format NVRAM, " : ""),
np->myaddr,
np->minsync < 12 ? 40 : (np->minsync < 25 ? 20 : 10),
(np->rv_scntl0 & 0xa) ? ", Parity Checking" : ", NO Parity",
(np->rv_stest2 & 0x20) ? ", Differential" : "");
if (bootverbose > 1) {
printk (KERN_INFO "%s: initial SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
"(hex) %02x/%02x/%02x/%02x/%02x/%02xn",
ncr_name(np), np->sv_scntl3, np->sv_dmode, np->sv_dcntl,
np->sv_ctest3, np->sv_ctest4, np->sv_ctest5);
printk (KERN_INFO "%s: final SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
"(hex) %02x/%02x/%02x/%02x/%02x/%02xn",
ncr_name(np), np->rv_scntl3, np->rv_dmode, np->rv_dcntl,
np->rv_ctest3, np->rv_ctest4, np->rv_ctest5);
}
if (bootverbose && np->paddr2)
printk (KERN_INFO "%s: on-chip RAM at 0x%lxn",
ncr_name(np), np->paddr2);
return 0;
}
/*
** Host attach and initialisations.
**
** Allocate host data and ncb structure.
** Request IO region and remap MMIO region.
** Do chip initialization.
** If all is OK, install interrupt handling and
** start the timer daemon.
*/
static int __init
ncr_attach (Scsi_Host_Template *tpnt, int unit, ncr_device *device)
{
struct host_data *host_data;
ncb_p np = 0;
struct Scsi_Host *instance = 0;
u_long flags = 0;
ncr_nvram *nvram = device->nvram;
int i;
printk(KERN_INFO "ncr53c%s-%d: rev 0x%x on pci bus %d device %d function %d "
#ifdef __sparc__
"irq %sn",
#else
"irq %dn",
#endif
device->chip.name, unit, device->chip.revision_id,
device->slot.bus, (device->slot.device_fn & 0xf8) >> 3,
device->slot.device_fn & 7,
#ifdef __sparc__
__irq_itoa(device->slot.irq));
#else
device->slot.irq);
#endif
/*
** Allocate host_data structure
*/
if (!(instance = scsi_register(tpnt, sizeof(*host_data))))
goto attach_error;
host_data = (struct host_data *) instance->hostdata;
/*
** Allocate the host control block.
*/
np = __m_calloc_dma(device->pdev, sizeof(struct ncb), "NCB");
if (!np)
goto attach_error;
NCR_INIT_LOCK_NCB(np);
np->pdev = device->pdev;
np->p_ncb = vtobus(np);
host_data->ncb = np;
/*
** Allocate the default CCB.
*/
np->ccb = (ccb_p) m_calloc_dma(sizeof(struct ccb), "CCB");
if (!np->ccb)
goto attach_error;
/*
** Store input informations in the host data structure.
*/
strncpy(np->chip_name, device->chip.name, sizeof(np->chip_name) - 1);
np->unit = unit;
np->verbose = driver_setup.verbose;
sprintf(np->inst_name, "ncr53c%s-%d", np->chip_name, np->unit);
np->device_id = device->chip.device_id;
np->revision_id = device->chip.revision_id;
np->bus = device->slot.bus;
np->device_fn = device->slot.device_fn;
np->features = device->chip.features;
np->clock_divn = device->chip.nr_divisor;
np->maxoffs = device->chip.offset_max;
np->maxburst = device->chip.burst_max;
np->myaddr = device->host_id;
/*
** Allocate SCRIPTS areas.
*/
np->script0 = (struct script *)
m_calloc_dma(sizeof(struct script), "SCRIPT");
if (!np->script0)
goto attach_error;
np->scripth0 = (struct scripth *)
m_calloc_dma(sizeof(struct scripth), "SCRIPTH");
if (!np->scripth0)
goto attach_error;
/*
** Initialize timer structure
**
*/
init_timer(&np->timer);
np->timer.data = (unsigned long) np;
np->timer.function = ncr53c8xx_timeout;
/*
** Try to map the controller chip to
** virtual and physical memory.
*/
np->paddr = device->slot.base;
np->paddr2 = (np->features & FE_RAM)? device->slot.base_2 : 0;
#ifndef SCSI_NCR_IOMAPPED
np->vaddr = remap_pci_mem(device->slot.base_c, (u_long) 128);
if (!np->vaddr) {
printk(KERN_ERR
"%s: can't map memory mapped IO regionn",ncr_name(np));
goto attach_error;
}
else
if (bootverbose > 1)
printk(KERN_INFO
"%s: using memory mapped IO at virtual address 0x%lxn", ncr_name(np), (u_long) np->vaddr);
/*
** 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;
#endif /* !defined SCSI_NCR_IOMAPPED */
/*
** Try to map the controller chip into iospace.
*/
request_region(device->slot.io_port, 128, "ncr53c8xx");
np->base_io = device->slot.io_port;
#ifdef SCSI_NCR_NVRAM_SUPPORT
if (nvram) {
switch(nvram->type) {
case SCSI_NCR_SYMBIOS_NVRAM:
#ifdef SCSI_NCR_DEBUG_NVRAM
ncr_display_Symbios_nvram(&nvram->data.Symbios);
#endif
break;
case SCSI_NCR_TEKRAM_NVRAM:
#ifdef SCSI_NCR_DEBUG_NVRAM
ncr_display_Tekram_nvram(&nvram->data.Tekram);
#endif
break;
default:
nvram = 0;
#ifdef SCSI_NCR_DEBUG_NVRAM
printk(KERN_DEBUG "%s: NVRAM: None or invalid data.n", ncr_name(np));
#endif
}
}
#endif
/*
** Do chip dependent initialization.
*/
(void)ncr_prepare_setting(np, nvram);
if (np->paddr2 && sizeof(struct script) > 4096) {
np->paddr2 = 0;
printk(KERN_WARNING "%s: script too large, NOT using on chip RAM.n",
ncr_name(np));
}
/*
** Fill Linux host instance structure
*/
instance->max_channel = 0;
instance->this_id = np->myaddr;
instance->max_id = np->maxwide ? 16 : 8;
instance->max_lun = SCSI_NCR_MAX_LUN;
#ifndef SCSI_NCR_IOMAPPED
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,3,29)
instance->base = (unsigned long) np->reg;
#else
instance->base = (char *) np->reg;
#endif
#endif
instance->irq = device->slot.irq;
instance->unique_id = device->slot.io_port;
instance->io_port = device->slot.io_port;
instance->n_io_port = 128;
instance->dma_channel = 0;
instance->cmd_per_lun = MAX_TAGS;
instance->can_queue = (MAX_START-4);
instance->select_queue_depths = ncr53c8xx_select_queue_depths;
scsi_set_pci_device(instance, device->pdev);
#ifdef SCSI_NCR_INTEGRITY_CHECKING
np->check_integrity = 0;
instance->check_integrity = 0;
#ifdef SCSI_NCR_ENABLE_INTEGRITY_CHECK
if ( !(driver_setup.bus_check & 0x04) ) {
np->check_integrity = 1;
instance->check_integrity = 1;
}
#endif
#endif
/*
** Patch script to physical addresses
*/
ncr_script_fill (&script0, &scripth0);
np->scripth = np->scripth0;
np->p_scripth = vtobus(np->scripth);
np->p_script = (np->paddr2) ? np->paddr2 : vtobus(np->script0);
ncr_script_copy_and_bind (np, (ncrcmd *) &script0, (ncrcmd *) np->script0, sizeof(struct script));
ncr_script_copy_and_bind (np, (ncrcmd *) &scripth0, (ncrcmd *) np->scripth0, sizeof(struct scripth));
np->ccb->p_ccb = vtobus (np->ccb);
/*
** Patch the script for LED support.
*/
if (np->features & FE_LED0) {
np->script0->idle[0] =
cpu_to_scr(SCR_REG_REG(gpreg, SCR_OR, 0x01));
np->script0->reselected[0] =
cpu_to_scr(SCR_REG_REG(gpreg, SCR_AND, 0xfe));
np->script0->start[0] =
cpu_to_scr(SCR_REG_REG(gpreg, SCR_AND, 0xfe));
}
/*
** Look for the target control block of this nexus.
** For i = 0 to 3
** JUMP ^ IFTRUE (MASK (i, 3)), @(next_lcb)
*/
for (i = 0 ; i < 4 ; i++) {
np->jump_tcb[i].l_cmd =
cpu_to_scr((SCR_JUMP ^ IFTRUE (MASK (i, 3))));
np->jump_tcb[i].l_paddr =
cpu_to_scr(NCB_SCRIPTH_PHYS (np, bad_target));
}
/*
** Reset chip.
*/
OUTB (nc_istat, SRST);
UDELAY (100);
OUTB (nc_istat, 0 );
/*
** Now check the cache handling of the pci chipset.
*/
if (ncr_snooptest (np)) {
printk (KERN_ERR "CACHE INCORRECTLY CONFIGURED.n");
goto attach_error;
};
/*
** Install the interrupt handler.
*/
if (request_irq(device->slot.irq, ncr53c8xx_intr,
((driver_setup.irqm & 0x10) ? 0 : SA_SHIRQ) |
#if LINUX_VERSION_CODE < LinuxVersionCode(2,2,0)
((driver_setup.irqm & 0x20) ? 0 : SA_INTERRUPT),
#else
0,
#endif
"ncr53c8xx", np)) {
#ifdef __sparc__
printk(KERN_ERR "%s: request irq %s failuren",
ncr_name(np), __irq_itoa(device->slot.irq));
#else
printk(KERN_ERR "%s: request irq %d failuren",
ncr_name(np), device->slot.irq);
#endif
goto attach_error;
}
np->irq = device->slot.irq;
/*
** Initialize the fixed part of the default ccb.
*/
ncr_init_ccb(np, np->ccb);
/*
** After SCSI devices have been opened, we cannot
** reset the bus safely, so we do it here.
** Interrupt handler does the real work.
** Process the reset exception,
** if interrupts are not enabled yet.
** Then enable disconnects.
*/
NCR_LOCK_NCB(np, flags);
if (ncr_reset_scsi_bus(np, 0, driver_setup.settle_delay) != 0) {
printk(KERN_ERR "%s: FATAL ERROR: CHECK SCSI BUS - CABLES, TERMINATION, DEVICE POWER etc.!n", ncr_name(np));
NCR_UNLOCK_NCB(np, flags);
goto attach_error;
}
ncr_exception (np);
np->disc = 1;
/*
** The middle-level SCSI driver does not
** wait for devices to settle.
** Wait synchronously if more than 2 seconds.
*/
if (driver_setup.settle_delay > 2) {
printk(KERN_INFO "%s: waiting %d seconds for scsi devices to settle...n",
ncr_name(np), driver_setup.settle_delay);
MDELAY (1000 * driver_setup.settle_delay);
}
/*
** Now let the generic SCSI driver
** look for the SCSI devices on the bus ..
*/
/*
** start the timeout daemon
*/
np->lasttime=0;
ncr_timeout (np);
/*
** use SIMPLE TAG messages by default
*/
#ifdef SCSI_NCR_ALWAYS_SIMPLE_TAG
np->order = M_SIMPLE_TAG;
#endif
/*
** Done.
*/
if (!the_template) {
the_template = instance->hostt;
first_host = instance;
}
NCR_UNLOCK_NCB(np, flags);
return 0;
attach_error:
if (!instance) return -1;
printk(KERN_INFO "%s: detaching...n", ncr_name(np));
if (!np)
goto unregister;
#ifndef SCSI_NCR_IOMAPPED
if (np->vaddr) {
#ifdef DEBUG_NCR53C8XX
printk(KERN_DEBUG "%s: releasing memory mapped IO region %lx[%d]n", ncr_name(np), (u_long) np->vaddr, 128);
#endif
unmap_pci_mem((vm_offset_t) np->vaddr, (u_long) 128);
}
#endif /* !SCSI_NCR_IOMAPPED */
if (np->base_io) {
#ifdef DEBUG_NCR53C8XX
printk(KERN_DEBUG "%s: releasing IO region %x[%d]n", ncr_name(np), np->base_io, 128);
#endif
release_region(np->base_io, 128);
}
if (np->irq) {
#ifdef DEBUG_NCR53C8XX
#ifdef __sparc__
printk(KERN_INFO "%s: freeing irq %sn", ncr_name(np),
__irq_itoa(np->irq));
#else
printk(KERN_INFO "%s: freeing irq %dn", ncr_name(np), np->irq);
#endif
#endif
free_irq(np->irq, np);
}
if (np->scripth0)
m_free_dma(np->scripth0, sizeof(struct scripth), "SCRIPTH");
if (np->script0)
m_free_dma(np->script0, sizeof(struct script), "SCRIPT");
if (np->ccb)
m_free_dma(np->ccb, sizeof(struct ccb), "CCB");
m_free_dma(np, sizeof(struct ncb), "NCB");
unregister:
scsi_unregister(instance);
return -1;
}
/*==========================================================
**
**
** Done SCSI commands list management.
**
** We donnot enter the scsi_done() callback immediately
** after a command has been seen as completed but we
** insert it into a list which is flushed outside any kind
** of driver critical section.
** This allows to do minimal stuff under interrupt and
** inside critical sections and to also avoid locking up
** on recursive calls to driver entry points under SMP.
** In fact, the only kernel point which is entered by the
** driver with a driver lock set is kmalloc(GFP_ATOMIC)
** that shall not reenter the driver under any circumstances,
** AFAIK.
**
**==========================================================
*/
static inline void ncr_queue_done_cmd(ncb_p np, Scsi_Cmnd *cmd)
{
unmap_scsi_data(np, cmd);
cmd->host_scribble = (char *) np->done_list;
np->done_list = cmd;
}
static inline void ncr_flush_done_cmds(Scsi_Cmnd *lcmd)
{
Scsi_Cmnd *cmd;
while (lcmd) {
cmd = lcmd;
lcmd = (Scsi_Cmnd *) cmd->host_scribble;
cmd->scsi_done(cmd);
}
}
/*==========================================================
**
**
** Prepare the next negotiation message for integrity check,
** if needed.
**
** Fill in the part of message buffer that contains the
** negotiation and the nego_status field of the CCB.
** Returns the size of the message in bytes.
**
**
**==========================================================
*/
#ifdef SCSI_NCR_INTEGRITY_CHECKING
static int ncr_ic_nego(ncb_p np, ccb_p cp, Scsi_Cmnd *cmd, u_char *msgptr)
{
tcb_p tp = &np->target[cp->target];
int msglen = 0;
int nego = 0;
u_char no_increase;
if (tp->inq_done) {
if (!tp->ic_maximums_set) {
tp->ic_maximums_set = 1;
/* check target and host adapter capabilities */
if ( (tp->inq_byte7 & INQ7_WIDE16) &&
np->maxwide && tp->usrwide )
tp->ic_max_width = 1;
else
tp->ic_max_width = 0;
if ((tp->inq_byte7 & INQ7_SYNC) && tp->maxoffs) {
tp->ic_min_sync = (tp->minsync < np->minsync) ?
np->minsync : tp->minsync;
}
else
tp->ic_min_sync = 255;
tp->period = 1;
tp->widedone = 1;
}
if (DEBUG_FLAGS & DEBUG_IC) {
printk("%s: cmd->ic_nego %d, 1st byte 0x%2Xn",
ncr_name(np), cmd->ic_nego, cmd->cmnd[0]);
}
/* First command from integrity check routine will request
* a PPR message. Disable.
*/
if ((cmd->ic_nego & NS_PPR) == NS_PPR)
cmd->ic_nego &= ~NS_PPR;
/* Previous command recorded a parity or an initiator
* detected error condition. Force bus to narrow for this
* target. Clear flag. Negotation on request sense.
* Note: kernel forces 2 bus resets :o( but clears itself out.
* Minor bug? in scsi_obsolete.c (ugly)
*/
if (np->check_integ_par) {
printk("%s: Parity Error. Target set to narrow.n",
ncr_name(np));
tp->ic_max_width = 0;
tp->widedone = tp->period = 0;
}
/* In case of a bus reset, ncr_negotiate will reset
* the flags tp->widedone and tp->period to 0, forcing
* a new negotiation.
*/
no_increase = 0;
if (tp->widedone == 0) {
cmd->ic_nego = NS_WIDE;
tp->widedone = 1;
no_increase = 1;
}
else if (tp->period == 0) {
cmd->ic_nego = NS_SYNC;
tp->period = 1;
no_increase = 1;
}
switch (cmd->ic_nego) {
case NS_WIDE:
/*
** negotiate wide transfers ?
** Do NOT negotiate if device only supports
** narrow.
*/
if (tp->ic_max_width | np->check_integ_par) {
nego = NS_WIDE;
msgptr[msglen++] = M_EXTENDED;
msgptr[msglen++] = 2;
msgptr[msglen++] = M_X_WIDE_REQ;
msgptr[msglen++] = cmd->ic_nego_width & tp->ic_max_width;
}
else
cmd->ic_nego_width &= tp->ic_max_width;
break;
case NS_SYNC:
/*
** negotiate synchronous transfers?
** Target must support sync transfers.
**
** If period becomes longer than max, reset to async
*/
if (tp->inq_byte7 & INQ7_SYNC) {
nego = NS_SYNC;
msgptr[msglen++] = M_EXTENDED;
msgptr[msglen++] = 3;
msgptr[msglen++] = M_X_SYNC_REQ;
switch (cmd->ic_nego_sync) {
case 2: /* increase the period */
if (!no_increase) {
if (tp->ic_min_sync <= 0x0A)
tp->ic_min_sync = 0x0C;
else if (tp->ic_min_sync <= 0x0C)
tp->ic_min_sync = 0x19;
else if (tp->ic_min_sync <= 0x19)
tp->ic_min_sync *= 2;
else {
tp->ic_min_sync = 255;
cmd->ic_nego_sync = 0;
tp->maxoffs = 0;
}
}
msgptr[msglen++] = tp->maxoffs?tp->ic_min_sync:0;
msgptr[msglen++] = tp->maxoffs;
break;
case 1: /* nego. to maximum */
msgptr[msglen++] = tp->maxoffs?tp->ic_min_sync:0;
msgptr[msglen++] = tp->maxoffs;
break;
case 0: /* nego to async */
default:
msgptr[msglen++] = 0;
msgptr[msglen++] = 0;
break;
};
}
else
cmd->ic_nego_sync = 0;
break;
case NS_NOCHANGE:
default:
break;
};
};
cp->nego_status = nego;
np->check_integ_par = 0;
if (nego) {
tp->nego_cp = cp;
if (DEBUG_FLAGS & DEBUG_NEGO) {
ncr_print_msg(cp, nego == NS_WIDE ?
"wide/narrow msgout": "sync/async msgout", msgptr);
};
};
return msglen;
}
#endif /* SCSI_NCR_INTEGRITY_CHECKING */
/*==========================================================
**
**
** Prepare the next negotiation message if needed.
**
** Fill in the part of message buffer that contains the
** negotiation and the nego_status field of the CCB.
** Returns the size of the message in bytes.
**
**
**==========================================================
*/
static int ncr_prepare_nego(ncb_p np, ccb_p cp, u_char *msgptr)
{
tcb_p tp = &np->target[cp->target];
int msglen = 0;
int nego = 0;
if (tp->inq_done) {
/*
** negotiate wide transfers ?
*/
if (!tp->widedone) {
if (tp->inq_byte7 & INQ7_WIDE16) {
nego = NS_WIDE;
#ifdef SCSI_NCR_INTEGRITY_CHECKING
if (tp->ic_done)
tp->usrwide &= tp->ic_max_width;
#endif
} else
tp->widedone=1;
};
/*
** negotiate synchronous transfers?
*/
if (!nego && !tp->period) {
if (tp->inq_byte7 & INQ7_SYNC) {
nego = NS_SYNC;
#ifdef SCSI_NCR_INTEGRITY_CHECKING
if ((tp->ic_done) &&
(tp->minsync < tp->ic_min_sync))
tp->minsync = tp->ic_min_sync;
#endif
} else {
tp->period =0xffff;
PRINT_TARGET(np, cp->target);
printk ("target did not report SYNC.n");
};
};
};
switch (nego) {
case NS_SYNC:
msgptr[msglen++] = M_EXTENDED;
msgptr[msglen++] = 3;
msgptr[msglen++] = M_X_SYNC_REQ;
msgptr[msglen++] = tp->maxoffs ? tp->minsync : 0;
msgptr[msglen++] = tp->maxoffs;
break;
case NS_WIDE:
msgptr[msglen++] = M_EXTENDED;
msgptr[msglen++] = 2;
msgptr[msglen++] = M_X_WIDE_REQ;
msgptr[msglen++] = tp->usrwide;
break;
};
cp->nego_status = nego;
if (nego) {
tp->nego_cp = cp;
if (DEBUG_FLAGS & DEBUG_NEGO) {
ncr_print_msg(cp, nego == NS_WIDE ?
"wide msgout":"sync_msgout", msgptr);
};
};
return msglen;
}
/*==========================================================
**
**
** Start execution of a SCSI command.
** This is called from the generic SCSI driver.
**
**
**==========================================================
*/
static int ncr_queue_command (ncb_p np, Scsi_Cmnd *cmd)
{
/* Scsi_Device *device = cmd->device; */
tcb_p tp = &np->target[cmd->target];
lcb_p lp = tp->lp[cmd->lun];
ccb_p cp;
int segments;
u_char idmsg, *msgptr;
u_int msglen;
int direction;
u_int32 lastp, goalp;
/*---------------------------------------------
**
** Some shortcuts ...
**
**---------------------------------------------
*/
if ((cmd->target == np->myaddr ) ||
(cmd->target >= MAX_TARGET) ||
(cmd->lun >= MAX_LUN )) {
return(DID_BAD_TARGET);
}
/*---------------------------------------------
**
** Complete the 1st TEST UNIT READY command
** with error condition if the device is
** flagged NOSCAN, in order to speed up
** the boot.
**
**---------------------------------------------
*/
if ((cmd->cmnd[0] == 0 || cmd->cmnd[0] == 0x12) &&
(tp->usrflag & UF_NOSCAN)) {
tp->usrflag &= ~UF_NOSCAN;
return DID_BAD_TARGET;
}
if (DEBUG_FLAGS & DEBUG_TINY) {
PRINT_ADDR(cmd);
printk ("CMD=%x ", cmd->cmnd[0]);
}
/*---------------------------------------------------
**
** Assign a ccb / bind cmd.
** If resetting, shorten settle_time if necessary
** in order to avoid spurious timeouts.
** If resetting or no free ccb,
** insert cmd into the waiting list.
**
**----------------------------------------------------
*/
if (np->settle_time && cmd->timeout_per_command >= HZ) {
u_long tlimit = ktime_get(cmd->timeout_per_command - HZ);
if (ktime_dif(np->settle_time, tlimit) > 0)
np->settle_time = tlimit;
}
if (np->settle_time || !(cp=ncr_get_ccb (np, cmd->target, cmd->lun))) {
insert_into_waiting_list(np, cmd);
return(DID_OK);
}
cp->cmd = cmd;
/*---------------------------------------------------
**
** Enable tagged queue if asked by scsi ioctl
**
**----------------------------------------------------
*/
#if 0 /* This stuff was only useful for linux-1.2.13 */
if (lp && !lp->numtags && cmd->device && cmd->device->tagged_queue) {
lp->numtags = tp->usrtags;
ncr_setup_tags (np, cmd->target, cmd->lun);
}
#endif
/*----------------------------------------------------
**
** Build the identify / tag / sdtr message
**
**----------------------------------------------------
*/
idmsg = M_IDENTIFY | cmd->lun;
if (cp ->tag != NO_TAG ||
(cp != np->ccb && np->disc && !(tp->usrflag & UF_NODISC)))
idmsg |= 0x40;
msgptr = cp->scsi_smsg;
msglen = 0;
msgptr[msglen++] = idmsg;
if (cp->tag != NO_TAG) {
char order = np->order;
/*
** Force ordered tag if necessary to avoid timeouts
** and to preserve interactivity.
*/
if (lp && ktime_exp(lp->tags_stime)) {
if (lp->tags_smap) {
order = M_ORDERED_TAG;
if ((DEBUG_FLAGS & DEBUG_TAGS)||bootverbose>2){
PRINT_ADDR(cmd);
printk("ordered tag forced.n");
}
}
lp->tags_stime = ktime_get(3*HZ);
lp->tags_smap = lp->tags_umap;
}
if (order == 0) {
/*
** Ordered write ops, unordered read ops.
*/
switch (cmd->cmnd[0]) {
case 0x08: /* READ_SMALL (6) */
case 0x28: /* READ_BIG (10) */
case 0xa8: /* READ_HUGE (12) */
order = M_SIMPLE_TAG;
break;
default:
order = M_ORDERED_TAG;
}
}
msgptr[msglen++] = order;
/*
** Actual tags are numbered 1,3,5,..2*MAXTAGS+1,
** since we may have to deal with devices that have
** problems with #TAG 0 or too great #TAG numbers.
*/
msgptr[msglen++] = (cp->tag << 1) + 1;
}
/*----------------------------------------------------
**
** Build the data descriptors
**
**----------------------------------------------------
*/
direction = scsi_data_direction(cmd);
if (direction != SCSI_DATA_NONE) {
segments = ncr_scatter (np, cp, cp->cmd);
if (segments < 0) {
ncr_free_ccb(np, cp);
return(DID_ERROR);
}
}
else {
cp->data_len = 0;
segments = 0;
}
/*---------------------------------------------------
**
** negotiation required?
**
** (nego_status is filled by ncr_prepare_nego())
**
**---------------------------------------------------
*/
cp->nego_status = 0;
#ifdef SCSI_NCR_INTEGRITY_CHECKING
if ((np->check_integrity && tp->ic_done) || !np->check_integrity) {
if ((!tp->widedone || !tp->period) && !tp->nego_cp && lp) {
msglen += ncr_prepare_nego (np, cp, msgptr + msglen);
}
}
else if (np->check_integrity && (cmd->ic_in_progress)) {
msglen += ncr_ic_nego (np, cp, cmd, msgptr + msglen);
}
else if (np->check_integrity && cmd->ic_complete) {
/*
* Midlayer signal to the driver that all of the scsi commands
* for the integrity check have completed. Save the negotiated
* parameters (extracted from sval and wval).
*/
{
u_char idiv;
idiv = (tp->wval>>4) & 0x07;
if ((tp->sval&0x1f) && idiv )
tp->period = (((tp->sval>>5)+4)
*div_10M[idiv-1])/np->clock_khz;
else
tp->period = 0xffff;
}
/*
* tp->period contains 10 times the transfer period,
* which itself is 4 * the requested negotiation rate.
*/
if (tp->period <= 250) tp->ic_min_sync = 10;
else if (tp->period <= 303) tp->ic_min_sync = 11;
else if (tp->period <= 500) tp->ic_min_sync = 12;
else
tp->ic_min_sync = (tp->period + 40 - 1) / 40;
/*
* Negotiation for this target it complete.
*/
tp->ic_max_width = (tp->wval & EWS) ? 1: 0;
tp->ic_done = 1;
tp->widedone = 1;
printk("%s: Integrity Check Complete: n", ncr_name(np));
printk("%s: %s %s SCSI", ncr_name(np),
(tp->sval&0x1f)?"SYNC":"ASYNC",
tp->ic_max_width?"WIDE":"NARROW");
if (tp->sval&0x1f) {
u_long mbs = 10000 * (tp->ic_max_width + 1);
printk(" %d.%d MB/s",
(int) (mbs / tp->period), (int) (mbs % tp->period));
printk(" (%d ns, %d offset)n",
tp->period/10, tp->sval&0x1f);
}
else
printk(" %d MB/s. n ", (tp->ic_max_width+1)*5);
}
#else
if ((!tp->widedone || !tp->period) && !tp->nego_cp && lp) {
msglen += ncr_prepare_nego (np, cp, msgptr + msglen);
}
#endif /* SCSI_NCR_INTEGRITY_CHECKING */
/*----------------------------------------------------
**
** Determine xfer direction.
**
**----------------------------------------------------
*/
if (!cp->data_len)
direction = SCSI_DATA_NONE;
/*
** If data direction is UNKNOWN, speculate DATA_READ
** but prepare alternate pointers for WRITE in case
** of our speculation will be just wrong.
** SCRIPTS will swap values if needed.
*/
switch(direction) {
case SCSI_DATA_UNKNOWN:
case SCSI_DATA_WRITE:
goalp = NCB_SCRIPT_PHYS (np, data_out2) + 8;
if (segments <= MAX_SCATTERL)
lastp = goalp - 8 - (segments * 16);
else {
lastp = NCB_SCRIPTH_PHYS (np, hdata_out2);
lastp -= (segments - MAX_SCATTERL) * 16;
}
if (direction != SCSI_DATA_UNKNOWN)
break;
cp->phys.header.wgoalp = cpu_to_scr(goalp);
cp->phys.header.wlastp = cpu_to_scr(lastp);
/* fall through */
case SCSI_DATA_READ:
goalp = NCB_SCRIPT_PHYS (np, data_in2) + 8;
if (segments <= MAX_SCATTERL)
lastp = goalp - 8 - (segments * 16);
else {
lastp = NCB_SCRIPTH_PHYS (np, hdata_in2);
lastp -= (segments - MAX_SCATTERL) * 16;
}
break;
default:
case SCSI_DATA_NONE:
lastp = goalp = NCB_SCRIPT_PHYS (np, no_data);
break;
}
/*
** Set all pointers values needed by SCRIPTS.
** If direction is unknown, start at data_io.
*/
cp->phys.header.lastp = cpu_to_scr(lastp);
cp->phys.header.goalp = cpu_to_scr(goalp);
if (direction == SCSI_DATA_UNKNOWN)
cp->phys.header.savep =
cpu_to_scr(NCB_SCRIPTH_PHYS (np, data_io));
else
cp->phys.header.savep= cpu_to_scr(lastp);
/*
** Save the initial data pointer in order to be able
** to redo the command.
*/
cp->startp = cp->phys.header.savep;
/*----------------------------------------------------
**
** fill in ccb
**
**----------------------------------------------------
**
**
** physical -> virtual backlink
** Generic SCSI command
*/
/*
** Startqueue
*/
cp->start.schedule.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, select));
cp->restart.schedule.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, resel_dsa));
/*
** select
*/
cp->phys.select.sel_id = cmd->target;
cp->phys.select.sel_scntl3 = tp->wval;
cp->phys.select.sel_sxfer = tp->sval;
/*
** message
*/
cp->phys.smsg.addr = cpu_to_scr(CCB_PHYS (cp, scsi_smsg));
cp->phys.smsg.size = cpu_to_scr(msglen);
/*
** command
*/
memcpy(cp->cdb_buf, cmd->cmnd, MIN(cmd->cmd_len, sizeof(cp->cdb_buf)));
cp->phys.cmd.addr = cpu_to_scr(CCB_PHYS (cp, cdb_buf[0]));
cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
/*
** status
*/
cp->actualquirks = tp->quirks;
cp->host_status = cp->nego_status ? HS_NEGOTIATE : HS_BUSY;
cp->scsi_status = S_ILLEGAL;
cp->parity_status = 0;
cp->xerr_status = XE_OK;
#if 0
cp->sync_status = tp->sval;
cp->wide_status = tp->wval;
#endif
/*----------------------------------------------------
**
** Critical region: start this job.
**
**----------------------------------------------------
*/
/*
** activate this job.
*/
cp->magic = CCB_MAGIC;
/*
** insert next CCBs into start queue.
** 2 max at a time is enough to flush the CCB wait queue.
*/
cp->auto_sense = 0;
if (lp)
ncr_start_next_ccb(np, lp, 2);
else
ncr_put_start_queue(np, cp);
/*
** Command is successfully queued.
*/
return(DID_OK);
}
/*==========================================================
**
**
** Insert a CCB into the start queue and wake up the
** SCRIPTS processor.
**
**
**==========================================================
*/
static void ncr_start_next_ccb(ncb_p np, lcb_p lp, int maxn)
{
XPT_QUEHEAD *qp;
ccb_p cp;
if (lp->held_ccb)
return;
while (maxn-- && lp->queuedccbs < lp->queuedepth) {
qp = xpt_remque_head(&lp->wait_ccbq);
if (!qp)
break;
++lp->queuedccbs;
cp = xpt_que_entry(qp, struct ccb, link_ccbq);
xpt_insque_tail(qp, &lp->busy_ccbq);
lp->jump_ccb[cp->tag == NO_TAG ? 0 : cp->tag] =
cpu_to_scr(CCB_PHYS (cp, restart));
ncr_put_start_queue(np, cp);
}
}
static void ncr_put_start_queue(ncb_p np, ccb_p cp)