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1275 |
phoenix |
#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/errno.h>
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#include <linux/pci.h>
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#include <linux/string.h>
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#include <linux/blk.h>
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#include <linux/init.h>
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#include <linux/spinlock.h>
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#include <asm/io.h>
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#include <asm/system.h>
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#include "scsi.h"
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#include "hosts.h"
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#include "AM53C974.h"
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#include "constants.h"
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#include "sd.h"
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/* AM53/79C974 (PCscsi) driver release 0.5
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* The architecture and much of the code of this device
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* driver was originally developed by Drew Eckhardt for
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* the NCR5380. The following copyrights apply:
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* For the architecture and all pieces of code which can also be found
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* in the NCR5380 device driver:
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* Copyright 1993, Drew Eckhardt
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* Visionary Computing
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* (Unix and Linux consulting and custom programming)
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* drew@colorado.edu
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* +1 (303) 666-5836
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*
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* The AM53C974_nobios_detect code was originally developed by
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* Robin Cutshaw (robin@xfree86.org) and is used here in a
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* slightly modified form.
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*
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* PCI detection rewritten by Martin Mares <mj@atrey.karlin.mff.cuni.cz>
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*
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* For the remaining code:
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* Copyright 1994, D. Frieauff
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* EMail: fri@rsx42sun0.dofn.de
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* Phone: x49-7545-8-2256 , x49-7541-42305
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*/
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/*
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* $Log: not supported by cvs2svn $
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*/
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#ifdef AM53C974_DEBUG
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#define DEB(x) x
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#ifdef AM53C974_DEBUG_KEYWAIT
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#define KEYWAIT() AM53C974_keywait()
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#else
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#define KEYWAIT()
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#endif
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#ifdef AM53C974_DEBUG_INIT
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#define DEB_INIT(x) x
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#else
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#define DEB_INIT(x)
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#endif
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#ifdef AM53C974_DEBUG_MSG
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#define DEB_MSG(x) x
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#else
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#define DEB_MSG(x)
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#endif
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#ifdef AM53C974_DEB_RESEL
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#define DEB_RESEL(x) x
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#else
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#define DEB_RESEL(x)
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#endif
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#ifdef AM53C974_DEBUG_QUEUE
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#define DEB_QUEUE(x) x
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#define LIST(x,y) {printk("LINE:%d Adding %p to %p\n", __LINE__, (void*)(x), (void*)(y)); if ((x)==(y)) udelay(5); }
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#define REMOVE(w,x,y,z) {printk("LINE:%d Removing: %p->%p %p->%p \n", __LINE__, (void*)(w), (void*)(x), (void*)(y), (void*)(z)); if ((x)==(y)) udelay(5); }
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#else
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#define DEB_QUEUE(x)
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#define LIST(x,y)
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#define REMOVE(w,x,y,z)
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#endif
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#ifdef AM53C974_DEBUG_INFO
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#define DEB_INFO(x) x
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#else
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#define DEB_INFO(x)
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#endif
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#ifdef AM53C974_DEBUG_LINKED
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#define DEB_LINKED(x) x
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#else
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#define DEB_LINKED(x)
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#endif
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#ifdef AM53C974_DEBUG_INTR
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#define DEB_INTR(x) x
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#else
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#define DEB_INTR(x)
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#endif
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#else
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#define DEB_INIT(x)
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#define DEB(x)
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#define DEB_QUEUE(x)
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#define LIST(x,y)
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#define REMOVE(w,x,y,z)
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#define DEB_INFO(x)
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#define DEB_LINKED(x)
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#define DEB_INTR(x)
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#define DEB_MSG(x)
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#define DEB_RESEL(x)
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#define KEYWAIT()
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#endif
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#ifdef AM53C974_DEBUG_ABORT
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#define DEB_ABORT(x) x
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#else
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#define DEB_ABORT(x)
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#endif
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#ifdef VERBOSE_AM53C974_DEBUG
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#define VDEB(x) x
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#else
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#define VDEB(x)
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#endif
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#define INSIDE(x,l,h) ( ((x) >= (l)) && ((x) <= (h)) )
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#include <scsi/scsicam.h>
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/***************************************************************************************
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* Default setting of the controller's SCSI id. Edit and uncomment this only if your *
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* BIOS does not correctly initialize the controller's SCSI id. *
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* If you don't get a warning during boot, it is correctly initialized. *
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****************************************************************************************/
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/* #define AM53C974_SCSI_ID 7 */
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/***************************************************************************************
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* Default settings for sync. negotiation enable, transfer rate and sync. offset. *
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* These settings can be replaced by LILO overrides (append) with the following syntax: *
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* AM53C974=host-scsi-id, target-scsi-id, max-rate, max-offset *
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* Sync. negotiation is disabled by default and will be enabled for those targets which *
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* are specified in the LILO override *
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****************************************************************************************/
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#define DEFAULT_SYNC_NEGOTIATION_ENABLED 0 /* 0 or 1 */
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#define DEFAULT_RATE 5 /* MHz, min: 3; max: 10 */
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#define DEFAULT_SYNC_OFFSET 0 /* bytes, min: 0; max: 15; use 0 for async. mode */
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/***************************************************************************************
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* If defined, don't allow targets to disconnect during commands. This will reduce *
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* performance, but may be worthwhile if you suspect the driver of corrupting data when *
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* a disconnect happens. *
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***************************************************************************************/
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#define AM53C974_PROHIBIT_DISCONNECT
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/* --------------------- don't edit below here --------------------- */
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#define AM53C974_DRIVER_REVISION_MAJOR 0
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#define AM53C974_DRIVER_REVISION_MINOR 5
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#define SEPARATOR_LINE \
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"--------------------------------------------------------------------------\n"
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/* debug control */
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/* #define AM53C974_DEBUG */
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/* #define AM53C974_DEBUG_MSG */
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/* #define AM53C974_DEBUG_KEYWAIT */
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/* #define AM53C974_DEBUG_INIT */
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/* #define AM53C974_DEBUG_QUEUE */
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/* #define AM53C974_DEBUG_INFO */
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/* #define AM53C974_DEBUG_LINKED */
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/* #define VERBOSE_AM53C974_DEBUG */
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/* #define AM53C974_DEBUG_INTR */
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/* #define AM53C974_DEB_RESEL */
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#define AM53C974_DEBUG_ABORT
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/* #define AM53C974_OPTION_DEBUG_PROBE_ONLY */
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/* special options/constants */
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#define DEF_CLK 40 /* chip clock freq. in MHz */
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#define MIN_PERIOD 4 /* for negotiation: min. number of clocks per cycle */
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#define MAX_PERIOD 13 /* for negotiation: max. number of clocks per cycle */
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#define MAX_OFFSET 15 /* for negotiation: max. offset (0=async) */
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#define DEF_SCSI_TIMEOUT 245 /* STIMREG value, 40 Mhz */
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#define DEF_STP 8 /* STPREG value assuming 5.0 MB/sec, FASTCLK, FASTSCSI */
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#define DEF_SOF_RAD 0 /* REQ/ACK deassertion delay */
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#define DEF_SOF_RAA 0 /* REQ/ACK assertion delay */
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#define DEF_ETM 0 /* CNTLREG1, ext. timing mode */
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#define DEF_PERE 1 /* CNTLREG1, parity error reporting */
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#define DEF_CLKF 0 /* CLKFREG, 0=40 Mhz */
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#define DEF_ENF 1 /* CNTLREG2, enable features */
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#define DEF_ADIDCHK 0 /* CNTLREG3, additional ID check */
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#define DEF_FASTSCSI 1 /* CNTLREG3, fast SCSI */
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#define DEF_FASTCLK 1 /* CNTLREG3, fast clocking, 5 MB/sec at 40MHz chip clk */
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#define DEF_GLITCH 1 /* CNTLREG4, glitch eater, 0=12ns, 1=35ns, 2=25ns, 3=off */
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#define DEF_PWD 0 /* CNTLREG4, reduced power feature */
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#define DEF_RAE 0 /* CNTLREG4, RAE active negation on REQ, ACK only */
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#define DEF_RADE 1 /* 1CNTLREG4, active negation on REQ, ACK and data */
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/*** SCSI block ***/
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#define CTCLREG 0x00 /* r current transf. count, low byte */
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#define CTCMREG 0x04 /* r current transf. count, middle byte */
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#define CTCHREG 0x38 /* r current transf. count, high byte */
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#define STCLREG 0x00 /* w start transf. count, low byte */
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#define STCMREG 0x04 /* w start transf. count, middle byte */
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#define STCHREG 0x38 /* w start transf. count, high byte */
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#define FFREG 0x08 /* rw SCSI FIFO reg. */
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#define STIMREG 0x14 /* w SCSI timeout reg. */
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#define SDIDREG 0x10 /* w SCSI destination ID reg. */
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#define SDIREG_MASK 0x07 /* mask */
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#define STPREG 0x18 /* w synchronous transf. period reg. */
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#define STPREG_STP 0x1F /* synchr. transfer period */
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#define CLKFREG 0x24 /* w clock factor reg. */
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#define CLKFREG_MASK 0x07 /* mask */
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#define CMDREG 0x0C /* rw SCSI command reg. */
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#define CMDREG_DMA 0x80 /* set DMA mode (set together with opcodes below) */
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#define CMDREG_IT 0x10 /* information transfer */
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#define CMDREG_ICCS 0x11 /* initiator command complete steps */
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#define CMDREG_MA 0x12 /* message accepted */
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#define CMDREG_TPB 0x98 /* transfer pad bytes, DMA mode only */
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#define CMDREG_SATN 0x1A /* set ATN */
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#define CMDREG_RATN 0x1B /* reset ATN */
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#define CMDREG_SOAS 0x41 /* select without ATN steps */
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#define CMDREG_SAS 0x42 /* select with ATN steps (1 msg byte) */
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#define CMDREG_SASS 0x43 /* select with ATN and stop steps */
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#define CMDREG_ESR 0x44 /* enable selection/reselection */
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#define CMDREG_DSR 0x45 /* disable selection/reselection */
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#define CMDREG_SA3S 0x46 /* select with ATN 3 steps (3 msg bytes) */
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#define CMDREG_NOP 0x00 /* no operation */
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#define CMDREG_CFIFO 0x01 /* clear FIFO */
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#define CMDREG_RDEV 0x02 /* reset device */
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#define CMDREG_RBUS 0x03 /* reset SCSI bus */
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#define STATREG 0x10 /* r SCSI status reg. */
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#define STATREG_INT 0x80 /* SCSI interrupt condition detected */
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#define STATREG_IOE 0x40 /* SCSI illegal operation error detected */
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#define STATREG_PE 0x20 /* SCSI parity error detected */
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#define STATREG_CTZ 0x10 /* CTC reg decremented to zero */
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#define STATREG_MSG 0x04 /* SCSI MSG phase (latched?) */
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#define STATREG_CD 0x02 /* SCSI C/D phase (latched?) */
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#define STATREG_IO 0x01 /* SCSI I/O phase (latched?) */
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#define STATREG_PHASE 0x07 /* SCSI phase mask */
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#define INSTREG 0x14 /* r interrupt status reg. */
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#define INSTREG_SRST 0x80 /* SCSI reset detected */
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#define INSTREG_ICMD 0x40 /* SCSI invalid command detected */
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#define INSTREG_DIS 0x20 /* target disconnected or sel/resel timeout */
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#define INSTREG_SR 0x10 /* device on bus has service request */
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#define INSTREG_SO 0x08 /* successful operation */
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#define INSTREG_RESEL 0x04 /* device reselected as initiator */
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#define ISREG 0x18 /* r internal state reg. */
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#define ISREG_SOF 0x08 /* synchronous offset flag (act. low) */
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#define ISREG_IS 0x07 /* status of intermediate op. */
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#define ISREG_OK_NO_STOP 0x04 /* selection successful */
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#define ISREG_OK_STOP 0x01 /* selection successful */
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#define CFIREG 0x1C /* r current FIFO/internal state reg. */
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#define CFIREG_IS 0xE0 /* status of intermediate op. */
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#define CFIREG_CF 0x1F /* number of bytes in SCSI FIFO */
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#define SOFREG 0x1C /* w synchr. offset reg. */
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#define SOFREG_RAD 0xC0 /* REQ/ACK deassertion delay (sync.) */
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#define SOFREG_RAA 0x30 /* REQ/ACK assertion delay (sync.) */
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#define SOFREG_SO 0x0F /* synch. offset (sync.) */
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#define CNTLREG1 0x20 /* rw control register one */
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#define CNTLREG1_ETM 0x80 /* set extended timing mode */
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#define CNTLREG1_DISR 0x40 /* disable interrupt on SCSI reset */
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#define CNTLREG1_PERE 0x10 /* enable parity error reporting */
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#define CNTLREG1_SID 0x07 /* host adapter SCSI ID */
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#define CNTLREG2 0x2C /* rw control register two */
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#define CNTLREG2_ENF 0x40 /* enable features */
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#define CNTLREG3 0x30 /* rw control register three */
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#define CNTLREG3_ADIDCHK 0x80 /* additional ID check */
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#define CNTLREG3_FASTSCSI 0x10 /* fast SCSI */
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#define CNTLREG3_FASTCLK 0x08 /* fast SCSI clocking */
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| 279 |
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#define CNTLREG4 0x34 /* rw control register four */
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#define CNTLREG4_GLITCH 0xC0 /* glitch eater */
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#define CNTLREG4_PWD 0x20 /* reduced power feature */
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| 282 |
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#define CNTLREG4_RAE 0x08 /* write only, active negot. ctrl. */
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| 283 |
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#define CNTLREG4_RADE 0x04 /* active negot. ctrl. */
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#define CNTLREG4_RES 0x10 /* reserved bit, must be 1 */
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| 286 |
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/*** DMA block ***/
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| 287 |
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#define DMACMD 0x40 /* rw command */
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| 288 |
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#define DMACMD_DIR 0x80 /* transfer direction (1=read from device) */
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#define DMACMD_INTE_D 0x40 /* DMA transfer interrupt enable */
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| 290 |
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#define DMACMD_INTE_P 0x20 /* page transfer interrupt enable */
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| 291 |
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#define DMACMD_MDL 0x10 /* map to memory descriptor list */
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| 292 |
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#define DMACMD_DIAG 0x04 /* diagnostics, set to 0 */
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| 293 |
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#define DMACMD_IDLE 0x00 /* idle cmd */
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| 294 |
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#define DMACMD_BLAST 0x01 /* flush FIFO to memory */
|
| 295 |
|
|
#define DMACMD_ABORT 0x02 /* terminate DMA */
|
| 296 |
|
|
#define DMACMD_START 0x03 /* start DMA */
|
| 297 |
|
|
|
| 298 |
|
|
#define DMASTATUS 0x54 /* r status register */
|
| 299 |
|
|
#define DMASTATUS_BCMPLT 0x20 /* BLAST complete */
|
| 300 |
|
|
#define DMASTATUS_SCSIINT 0x10 /* SCSI interrupt pending */
|
| 301 |
|
|
#define DMASTATUS_DONE 0x08 /* DMA transfer terminated */
|
| 302 |
|
|
#define DMASTATUS_ABORT 0x04 /* DMA transfer aborted */
|
| 303 |
|
|
#define DMASTATUS_ERROR 0x02 /* DMA transfer error */
|
| 304 |
|
|
#define DMASTATUS_PWDN 0x02 /* power down indicator */
|
| 305 |
|
|
|
| 306 |
|
|
#define DMASTC 0x44 /* rw starting transfer count */
|
| 307 |
|
|
#define DMASPA 0x48 /* rw starting physical address */
|
| 308 |
|
|
#define DMAWBC 0x4C /* r working byte counter */
|
| 309 |
|
|
#define DMAWAC 0x50 /* r working address counter */
|
| 310 |
|
|
#define DMASMDLA 0x58 /* rw starting MDL address */
|
| 311 |
|
|
#define DMAWMAC 0x5C /* r working MDL counter */
|
| 312 |
|
|
|
| 313 |
|
|
/*** SCSI phases ***/
|
| 314 |
|
|
#define PHASE_MSGIN 0x07
|
| 315 |
|
|
#define PHASE_MSGOUT 0x06
|
| 316 |
|
|
#define PHASE_RES_1 0x05
|
| 317 |
|
|
#define PHASE_RES_0 0x04
|
| 318 |
|
|
#define PHASE_STATIN 0x03
|
| 319 |
|
|
#define PHASE_CMDOUT 0x02
|
| 320 |
|
|
#define PHASE_DATAIN 0x01
|
| 321 |
|
|
#define PHASE_DATAOUT 0x00
|
| 322 |
|
|
|
| 323 |
|
|
|
| 324 |
|
|
#define AM53C974_local_declare() unsigned long io_port
|
| 325 |
|
|
#define AM53C974_setio(instance) io_port = instance->io_port
|
| 326 |
|
|
#define AM53C974_read_8(addr) inb(io_port + (addr))
|
| 327 |
|
|
#define AM53C974_write_8(addr,x) outb((x), io_port + (addr))
|
| 328 |
|
|
#define AM53C974_read_16(addr) inw(io_port + (addr))
|
| 329 |
|
|
#define AM53C974_write_16(addr,x) outw((x), io_port + (addr))
|
| 330 |
|
|
#define AM53C974_read_32(addr) inl(io_port + (addr))
|
| 331 |
|
|
#define AM53C974_write_32(addr,x) outl((x), io_port + (addr))
|
| 332 |
|
|
|
| 333 |
|
|
#define AM53C974_poll_int() { do { statreg = AM53C974_read_8(STATREG); } \
|
| 334 |
|
|
while (!(statreg & STATREG_INT)) ; \
|
| 335 |
|
|
AM53C974_read_8(INSTREG) ; } /* clear int */
|
| 336 |
|
|
#define AM53C974_cfifo() (AM53C974_read_8(CFIREG) & CFIREG_CF)
|
| 337 |
|
|
|
| 338 |
|
|
/* These are "special" values for the tag parameter passed to AM53C974_select. */
|
| 339 |
|
|
#define TAG_NEXT -1 /* Use next free tag */
|
| 340 |
|
|
#define TAG_NONE -2 /* Establish I_T_L nexus instead of I_T_L_Q
|
| 341 |
|
|
* even on SCSI-II devices */
|
| 342 |
|
|
|
| 343 |
|
|
/************ LILO overrides *************/
|
| 344 |
|
|
typedef struct _override_t {
|
| 345 |
|
|
int host_scsi_id; /* SCSI id of the bus controller */
|
| 346 |
|
|
int target_scsi_id; /* SCSI id of target */
|
| 347 |
|
|
int max_rate; /* max. transfer rate */
|
| 348 |
|
|
int max_offset; /* max. sync. offset, 0 = asynchronous */
|
| 349 |
|
|
} override_t;
|
| 350 |
|
|
|
| 351 |
|
|
|
| 352 |
|
|
#ifdef AM53C974_DEBUG
|
| 353 |
|
|
static void AM53C974_print_phase(struct Scsi_Host *instance);
|
| 354 |
|
|
static void AM53C974_print_queues(struct Scsi_Host *instance);
|
| 355 |
|
|
#endif /* AM53C974_DEBUG */
|
| 356 |
|
|
static void AM53C974_print(struct Scsi_Host *instance);
|
| 357 |
|
|
static void AM53C974_keywait(void);
|
| 358 |
|
|
static __inline__ int AM53C974_pci_detect(Scsi_Host_Template * tpnt);
|
| 359 |
|
|
static int AM53C974_init(Scsi_Host_Template * tpnt, struct pci_dev *pdev);
|
| 360 |
|
|
static void AM53C974_config_after_reset(struct Scsi_Host *instance);
|
| 361 |
|
|
static __inline__ void initialize_SCp(Scsi_Cmnd * cmd);
|
| 362 |
|
|
static __inline__ void run_main(void);
|
| 363 |
|
|
static void AM53C974_main(void);
|
| 364 |
|
|
static void AM53C974_intr(int irq, void *dev_id, struct pt_regs *regs);
|
| 365 |
|
|
static void do_AM53C974_intr(int irq, void *dev_id, struct pt_regs *regs);
|
| 366 |
|
|
static void AM53C974_intr_disconnect(struct Scsi_Host *instance);
|
| 367 |
|
|
static int AM53C974_sync_neg(struct Scsi_Host *instance, int target, unsigned char *msg);
|
| 368 |
|
|
static __inline__ void AM53C974_set_async(struct Scsi_Host *instance, int target);
|
| 369 |
|
|
static __inline__ void AM53C974_set_sync(struct Scsi_Host *instance, int target);
|
| 370 |
|
|
static void AM53C974_information_transfer(struct Scsi_Host *instance,
|
| 371 |
|
|
unsigned char statreg, unsigned char isreg,
|
| 372 |
|
|
unsigned char instreg, unsigned char cfifo,
|
| 373 |
|
|
unsigned char dmastatus);
|
| 374 |
|
|
static int AM53C974_message(struct Scsi_Host *instance, Scsi_Cmnd * cmd, unsigned char msg);
|
| 375 |
|
|
static void AM53C974_select(struct Scsi_Host *instance, Scsi_Cmnd * cmd, int tag);
|
| 376 |
|
|
static void AM53C974_intr_reselect(struct Scsi_Host *instance, unsigned char statreg);
|
| 377 |
|
|
static __inline__ void AM53C974_transfer_dma(struct Scsi_Host *instance, short dir,
|
| 378 |
|
|
unsigned long length, char *data);
|
| 379 |
|
|
static void AM53C974_dma_blast(struct Scsi_Host *instance, unsigned char dmastatus,
|
| 380 |
|
|
unsigned char statreg);
|
| 381 |
|
|
static void AM53C974_intr_bus_reset(struct Scsi_Host *instance);
|
| 382 |
|
|
|
| 383 |
|
|
static struct Scsi_Host *first_instance;
|
| 384 |
|
|
static Scsi_Host_Template *the_template;
|
| 385 |
|
|
static struct Scsi_Host *first_host; /* Head of list of AMD boards */
|
| 386 |
|
|
static volatile int main_running;
|
| 387 |
|
|
static int commandline_current;
|
| 388 |
|
|
override_t overrides[7] =
|
| 389 |
|
|
{
|
| 390 |
|
|
{-1, 0, 0, 0},}; /* LILO overrides */
|
| 391 |
|
|
|
| 392 |
|
|
#ifdef AM53C974_DEBUG
|
| 393 |
|
|
static int deb_stop = 1;
|
| 394 |
|
|
|
| 395 |
|
|
static struct {
|
| 396 |
|
|
unsigned char value;
|
| 397 |
|
|
char *name;
|
| 398 |
|
|
} phases[] = {
|
| 399 |
|
|
|
| 400 |
|
|
{
|
| 401 |
|
|
PHASE_DATAOUT, "DATAOUT"
|
| 402 |
|
|
}, {
|
| 403 |
|
|
PHASE_DATAIN, "DATAIN"
|
| 404 |
|
|
}, {
|
| 405 |
|
|
PHASE_CMDOUT, "CMDOUT"
|
| 406 |
|
|
},
|
| 407 |
|
|
{
|
| 408 |
|
|
PHASE_STATIN, "STATIN"
|
| 409 |
|
|
}, {
|
| 410 |
|
|
PHASE_MSGOUT, "MSGOUT"
|
| 411 |
|
|
}, {
|
| 412 |
|
|
PHASE_MSGIN, "MSGIN"
|
| 413 |
|
|
},
|
| 414 |
|
|
{
|
| 415 |
|
|
PHASE_RES_0, "RESERVED 0"
|
| 416 |
|
|
}, {
|
| 417 |
|
|
PHASE_RES_1, "RESERVED 1"
|
| 418 |
|
|
}
|
| 419 |
|
|
};
|
| 420 |
|
|
|
| 421 |
|
|
/**************************************************************************
|
| 422 |
|
|
* Function : void AM53C974_print_phase(struct Scsi_Host *instance)
|
| 423 |
|
|
*
|
| 424 |
|
|
* Purpose : print the current SCSI phase for debugging purposes
|
| 425 |
|
|
*
|
| 426 |
|
|
* Input : instance - which AM53C974
|
| 427 |
|
|
**************************************************************************/
|
| 428 |
|
|
static void AM53C974_print_phase(struct Scsi_Host *instance)
|
| 429 |
|
|
{
|
| 430 |
|
|
AM53C974_local_declare();
|
| 431 |
|
|
unsigned char statreg, latched;
|
| 432 |
|
|
int i;
|
| 433 |
|
|
AM53C974_setio(instance);
|
| 434 |
|
|
|
| 435 |
|
|
latched = (AM53C974_read_8(CNTLREG2)) & CNTLREG2_ENF;
|
| 436 |
|
|
statreg = AM53C974_read_8(STATREG);
|
| 437 |
|
|
for (i = 0; (phases[i].value != PHASE_RES_1) &&
|
| 438 |
|
|
(phases[i].value != (statreg & STATREG_PHASE)); ++i);
|
| 439 |
|
|
if (latched)
|
| 440 |
|
|
printk("scsi%d : phase %s, latched at end of last command\n", instance->host_no, phases[i].name);
|
| 441 |
|
|
else
|
| 442 |
|
|
printk("scsi%d : phase %s, real time\n", instance->host_no, phases[i].name);
|
| 443 |
|
|
}
|
| 444 |
|
|
|
| 445 |
|
|
/**************************************************************************
|
| 446 |
|
|
* Function : void AM53C974_print_queues(struct Scsi_Host *instance)
|
| 447 |
|
|
*
|
| 448 |
|
|
* Purpose : print commands in the various queues
|
| 449 |
|
|
*
|
| 450 |
|
|
* Inputs : instance - which AM53C974
|
| 451 |
|
|
**************************************************************************/
|
| 452 |
|
|
static void AM53C974_print_queues(struct Scsi_Host *instance)
|
| 453 |
|
|
{
|
| 454 |
|
|
unsigned long flags;
|
| 455 |
|
|
struct AM53C974_hostdata *hostdata = (struct AM53C974_hostdata *) instance->hostdata;
|
| 456 |
|
|
Scsi_Cmnd *ptr;
|
| 457 |
|
|
|
| 458 |
|
|
printk("AM53C974: coroutine is%s running.\n", main_running ? "" : "n't");
|
| 459 |
|
|
|
| 460 |
|
|
save_flags(flags);
|
| 461 |
|
|
cli();
|
| 462 |
|
|
|
| 463 |
|
|
if (!hostdata->connected) {
|
| 464 |
|
|
printk("scsi%d: no currently connected command\n", instance->host_no);
|
| 465 |
|
|
} else {
|
| 466 |
|
|
print_Scsi_Cmnd((Scsi_Cmnd *) hostdata->connected);
|
| 467 |
|
|
}
|
| 468 |
|
|
if (!hostdata->sel_cmd) {
|
| 469 |
|
|
printk("scsi%d: no currently arbitrating command\n", instance->host_no);
|
| 470 |
|
|
} else {
|
| 471 |
|
|
print_Scsi_Cmnd((Scsi_Cmnd *) hostdata->sel_cmd);
|
| 472 |
|
|
}
|
| 473 |
|
|
|
| 474 |
|
|
printk("scsi%d: issue_queue ", instance->host_no);
|
| 475 |
|
|
if (!hostdata->issue_queue)
|
| 476 |
|
|
printk("empty\n");
|
| 477 |
|
|
else {
|
| 478 |
|
|
printk(":\n");
|
| 479 |
|
|
for (ptr = (Scsi_Cmnd *) hostdata->issue_queue; ptr; ptr = (Scsi_Cmnd *) ptr->host_scribble)
|
| 480 |
|
|
print_Scsi_Cmnd(ptr);
|
| 481 |
|
|
}
|
| 482 |
|
|
|
| 483 |
|
|
printk("scsi%d: disconnected_queue ", instance->host_no);
|
| 484 |
|
|
if (!hostdata->disconnected_queue)
|
| 485 |
|
|
printk("empty\n");
|
| 486 |
|
|
else {
|
| 487 |
|
|
printk(":\n");
|
| 488 |
|
|
for (ptr = (Scsi_Cmnd *) hostdata->disconnected_queue; ptr; ptr = (Scsi_Cmnd *) ptr->host_scribble)
|
| 489 |
|
|
print_Scsi_Cmnd(ptr);
|
| 490 |
|
|
}
|
| 491 |
|
|
|
| 492 |
|
|
restore_flags(flags);
|
| 493 |
|
|
}
|
| 494 |
|
|
|
| 495 |
|
|
#endif /* AM53C974_DEBUG */
|
| 496 |
|
|
|
| 497 |
|
|
/**************************************************************************
|
| 498 |
|
|
* Function : void AM53C974_print(struct Scsi_Host *instance)
|
| 499 |
|
|
*
|
| 500 |
|
|
* Purpose : dump the chip registers for debugging purposes
|
| 501 |
|
|
*
|
| 502 |
|
|
* Input : instance - which AM53C974
|
| 503 |
|
|
**************************************************************************/
|
| 504 |
|
|
static void AM53C974_print(struct Scsi_Host *instance)
|
| 505 |
|
|
{
|
| 506 |
|
|
AM53C974_local_declare();
|
| 507 |
|
|
unsigned long flags;
|
| 508 |
|
|
unsigned long ctcreg, dmastc, dmaspa, dmawbc, dmawac;
|
| 509 |
|
|
unsigned char cmdreg, statreg, isreg, cfireg, cntlreg[4], dmacmd,
|
| 510 |
|
|
dmastatus;
|
| 511 |
|
|
AM53C974_setio(instance);
|
| 512 |
|
|
|
| 513 |
|
|
save_flags(flags);
|
| 514 |
|
|
cli();
|
| 515 |
|
|
ctcreg = AM53C974_read_8(CTCHREG) << 16;
|
| 516 |
|
|
ctcreg |= AM53C974_read_8(CTCMREG) << 8;
|
| 517 |
|
|
ctcreg |= AM53C974_read_8(CTCLREG);
|
| 518 |
|
|
cmdreg = AM53C974_read_8(CMDREG);
|
| 519 |
|
|
statreg = AM53C974_read_8(STATREG);
|
| 520 |
|
|
isreg = AM53C974_read_8(ISREG);
|
| 521 |
|
|
cfireg = AM53C974_read_8(CFIREG);
|
| 522 |
|
|
cntlreg[0] = AM53C974_read_8(CNTLREG1);
|
| 523 |
|
|
cntlreg[1] = AM53C974_read_8(CNTLREG2);
|
| 524 |
|
|
cntlreg[2] = AM53C974_read_8(CNTLREG3);
|
| 525 |
|
|
cntlreg[3] = AM53C974_read_8(CNTLREG4);
|
| 526 |
|
|
dmacmd = AM53C974_read_8(DMACMD);
|
| 527 |
|
|
dmastc = AM53C974_read_32(DMASTC);
|
| 528 |
|
|
dmaspa = AM53C974_read_32(DMASPA);
|
| 529 |
|
|
dmawbc = AM53C974_read_32(DMAWBC);
|
| 530 |
|
|
dmawac = AM53C974_read_32(DMAWAC);
|
| 531 |
|
|
dmastatus = AM53C974_read_8(DMASTATUS);
|
| 532 |
|
|
restore_flags(flags);
|
| 533 |
|
|
|
| 534 |
|
|
printk("AM53C974 register dump:\n");
|
| 535 |
|
|
printk("IO base: 0x%04lx; CTCREG: 0x%04lx; CMDREG: 0x%02x; STATREG: 0x%02x; ISREG: 0x%02x\n",
|
| 536 |
|
|
io_port, ctcreg, cmdreg, statreg, isreg);
|
| 537 |
|
|
printk("CFIREG: 0x%02x; CNTLREG1-4: 0x%02x; 0x%02x; 0x%02x; 0x%02x\n",
|
| 538 |
|
|
cfireg, cntlreg[0], cntlreg[1], cntlreg[2], cntlreg[3]);
|
| 539 |
|
|
printk("DMACMD: 0x%02x; DMASTC: 0x%04lx; DMASPA: 0x%04lx\n", dmacmd, dmastc, dmaspa);
|
| 540 |
|
|
printk("DMAWBC: 0x%04lx; DMAWAC: 0x%04lx; DMASTATUS: 0x%02x\n", dmawbc, dmawac, dmastatus);
|
| 541 |
|
|
printk("---------------------------------------------------------\n");
|
| 542 |
|
|
}
|
| 543 |
|
|
|
| 544 |
|
|
/**************************************************************************
|
| 545 |
|
|
* Function : void AM53C974_keywait(void)
|
| 546 |
|
|
*
|
| 547 |
|
|
* Purpose : wait until a key is pressed, if it was the 'r' key leave singlestep mode;
|
| 548 |
|
|
* this function is used for debugging only
|
| 549 |
|
|
*
|
| 550 |
|
|
* Input : none
|
| 551 |
|
|
**************************************************************************/
|
| 552 |
|
|
static void AM53C974_keywait(void)
|
| 553 |
|
|
{
|
| 554 |
|
|
unsigned long flags;
|
| 555 |
|
|
#ifdef AM53C974_DEBUG
|
| 556 |
|
|
int key;
|
| 557 |
|
|
|
| 558 |
|
|
if (!deb_stop)
|
| 559 |
|
|
return;
|
| 560 |
|
|
#endif
|
| 561 |
|
|
|
| 562 |
|
|
save_flags(flags);
|
| 563 |
|
|
cli();
|
| 564 |
|
|
while ((inb_p(0x64) & 0x01) != 0x01);
|
| 565 |
|
|
#ifdef AM53C974_DEBUG
|
| 566 |
|
|
key = inb(0x60);
|
| 567 |
|
|
if (key == 0x93)
|
| 568 |
|
|
deb_stop = 0; /* don't stop if 'r' was pressed */
|
| 569 |
|
|
#endif
|
| 570 |
|
|
restore_flags(flags);
|
| 571 |
|
|
}
|
| 572 |
|
|
|
| 573 |
|
|
#ifndef MODULE
|
| 574 |
|
|
/**************************************************************************
|
| 575 |
|
|
* Function : AM53C974_setup(char *str)
|
| 576 |
|
|
*
|
| 577 |
|
|
* Purpose : LILO command line initialization of the overrides array,
|
| 578 |
|
|
*
|
| 579 |
|
|
* Input : str - parameter string.
|
| 580 |
|
|
*
|
| 581 |
|
|
* Returns : 1.
|
| 582 |
|
|
*
|
| 583 |
|
|
* NOTE : this function needs to be declared as an external function
|
| 584 |
|
|
* in init/main.c and included there in the bootsetups list
|
| 585 |
|
|
***************************************************************************/
|
| 586 |
|
|
static int AM53C974_setup(char *str)
|
| 587 |
|
|
{
|
| 588 |
|
|
int ints[5];
|
| 589 |
|
|
|
| 590 |
|
|
get_options(str, ARRAY_SIZE(ints), ints);
|
| 591 |
|
|
|
| 592 |
|
|
if (ints[0] < 4)
|
| 593 |
|
|
printk("AM53C974_setup: wrong number of parameters;\n correct syntax is: AM53C974=host-scsi-id, target-scsi-id, max-rate, max-offset\n");
|
| 594 |
|
|
else {
|
| 595 |
|
|
if (commandline_current < (sizeof(overrides) / sizeof(override_t))) {
|
| 596 |
|
|
if ((ints[1] < 0) || (ints[1] > 7) ||
|
| 597 |
|
|
(ints[2] < 0) || (ints[2] > 7) ||
|
| 598 |
|
|
(ints[1] == ints[2]) ||
|
| 599 |
|
|
(ints[3] < (DEF_CLK / MAX_PERIOD)) || (ints[3] > (DEF_CLK / MIN_PERIOD)) ||
|
| 600 |
|
|
(ints[4] < 0) || (ints[4] > MAX_OFFSET))
|
| 601 |
|
|
printk("AM53C974_setup: illegal parameter\n");
|
| 602 |
|
|
else {
|
| 603 |
|
|
overrides[commandline_current].host_scsi_id = ints[1];
|
| 604 |
|
|
overrides[commandline_current].target_scsi_id = ints[2];
|
| 605 |
|
|
overrides[commandline_current].max_rate = ints[3];
|
| 606 |
|
|
overrides[commandline_current].max_offset = ints[4];
|
| 607 |
|
|
commandline_current++;
|
| 608 |
|
|
}
|
| 609 |
|
|
} else
|
| 610 |
|
|
printk("AM53C974_setup: too many overrides\n");
|
| 611 |
|
|
}
|
| 612 |
|
|
|
| 613 |
|
|
return 1;
|
| 614 |
|
|
}
|
| 615 |
|
|
__setup("AM53C974=", AM53C974_setup);
|
| 616 |
|
|
|
| 617 |
|
|
#endif /* !MODULE */
|
| 618 |
|
|
|
| 619 |
|
|
/**************************************************************************
|
| 620 |
|
|
* Function : int AM53C974_pci_detect(Scsi_Host_Template *tpnt)
|
| 621 |
|
|
*
|
| 622 |
|
|
* Purpose : detects and initializes AM53C974 SCSI chips with PCI Bios
|
| 623 |
|
|
*
|
| 624 |
|
|
* Inputs : tpnt - host template
|
| 625 |
|
|
*
|
| 626 |
|
|
* Returns : number of host adapters detected
|
| 627 |
|
|
**************************************************************************/
|
| 628 |
|
|
static int __init AM53C974_pci_detect(Scsi_Host_Template * tpnt)
|
| 629 |
|
|
{
|
| 630 |
|
|
int count = 0; /* number of boards detected */
|
| 631 |
|
|
struct pci_dev *pdev = NULL;
|
| 632 |
|
|
unsigned short command;
|
| 633 |
|
|
|
| 634 |
|
|
while ((pdev = pci_find_device(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_SCSI, pdev))) {
|
| 635 |
|
|
if (pci_enable_device(pdev))
|
| 636 |
|
|
continue;
|
| 637 |
|
|
pci_read_config_word(pdev, PCI_COMMAND, &command);
|
| 638 |
|
|
|
| 639 |
|
|
/* check whether device is I/O mapped -- should be */
|
| 640 |
|
|
if (!(command & PCI_COMMAND_IO))
|
| 641 |
|
|
continue;
|
| 642 |
|
|
|
| 643 |
|
|
pci_set_master (pdev);
|
| 644 |
|
|
|
| 645 |
|
|
/* everything seems OK now, so initialize */
|
| 646 |
|
|
if (AM53C974_init(tpnt, pdev))
|
| 647 |
|
|
count++;
|
| 648 |
|
|
}
|
| 649 |
|
|
return (count);
|
| 650 |
|
|
}
|
| 651 |
|
|
|
| 652 |
|
|
/**************************************************************************
|
| 653 |
|
|
* Function : int AM53C974_init(Scsi_Host_Template *tpnt, struct pci_dev *pdev)
|
| 654 |
|
|
*
|
| 655 |
|
|
* Purpose : initializes instance and corresponding AM53/79C974 chip,
|
| 656 |
|
|
*
|
| 657 |
|
|
* Inputs : tpnt - template, pci_config - PCI configuration,
|
| 658 |
|
|
*
|
| 659 |
|
|
* Returns : 1 on success, 0 on failure.
|
| 660 |
|
|
*
|
| 661 |
|
|
* NOTE: If no override for the controller's SCSI id is given and AM53C974_SCSI_ID
|
| 662 |
|
|
* is not defined we assume that the SCSI address of this controller is correctly
|
| 663 |
|
|
* set up by the BIOS (as reflected by contents of register CNTLREG1).
|
| 664 |
|
|
* This is the only BIOS assistance we need.
|
| 665 |
|
|
**************************************************************************/
|
| 666 |
|
|
static int __init AM53C974_init(Scsi_Host_Template * tpnt, struct pci_dev *pdev)
|
| 667 |
|
|
{
|
| 668 |
|
|
AM53C974_local_declare();
|
| 669 |
|
|
int i, j;
|
| 670 |
|
|
struct Scsi_Host *instance, *search;
|
| 671 |
|
|
struct AM53C974_hostdata *hostdata;
|
| 672 |
|
|
|
| 673 |
|
|
#ifdef AM53C974_OPTION_DEBUG_PROBE_ONLY
|
| 674 |
|
|
printk("AM53C974: probe only enabled, aborting initialization\n");
|
| 675 |
|
|
return 0;
|
| 676 |
|
|
#endif
|
| 677 |
|
|
|
| 678 |
|
|
instance = scsi_register(tpnt, sizeof(struct AM53C974_hostdata));
|
| 679 |
|
|
if (!instance) {
|
| 680 |
|
|
printk(KERN_WARNING "AM53C974: Unable to register host, aborting.\n");
|
| 681 |
|
|
return 0;
|
| 682 |
|
|
}
|
| 683 |
|
|
scsi_set_pci_device(instance, pdev);
|
| 684 |
|
|
hostdata = (struct AM53C974_hostdata *) instance->hostdata;
|
| 685 |
|
|
instance->base = 0;
|
| 686 |
|
|
instance->io_port = pci_resource_start(pdev, 0);
|
| 687 |
|
|
instance->irq = pdev->irq;
|
| 688 |
|
|
instance->dma_channel = -1;
|
| 689 |
|
|
AM53C974_setio(instance);
|
| 690 |
|
|
|
| 691 |
|
|
#ifdef AM53C974_SCSI_ID
|
| 692 |
|
|
instance->this_id = AM53C974_SCSI_ID;
|
| 693 |
|
|
AM53C974_write_8(CNTLREG1, instance->this_id & CNTLREG1_SID);
|
| 694 |
|
|
#else
|
| 695 |
|
|
instance->this_id = AM53C974_read_8(CNTLREG1) & CNTLREG1_SID;
|
| 696 |
|
|
if (instance->this_id != 7)
|
| 697 |
|
|
printk("scsi%d: WARNING: unusual hostadapter SCSI id %d; please verify!\n",
|
| 698 |
|
|
instance->host_no, instance->this_id);
|
| 699 |
|
|
#endif
|
| 700 |
|
|
|
| 701 |
|
|
for (i = 0; i < sizeof(hostdata->msgout); i++) {
|
| 702 |
|
|
hostdata->msgout[i] = NOP;
|
| 703 |
|
|
hostdata->last_message[i] = NOP;
|
| 704 |
|
|
}
|
| 705 |
|
|
for (i = 0; i < 8; i++) {
|
| 706 |
|
|
hostdata->busy[i] = 0;
|
| 707 |
|
|
hostdata->sync_per[i] = DEF_STP;
|
| 708 |
|
|
hostdata->sync_off[i] = 0;
|
| 709 |
|
|
hostdata->sync_neg[i] = 0;
|
| 710 |
|
|
hostdata->sync_en[i] = DEFAULT_SYNC_NEGOTIATION_ENABLED;
|
| 711 |
|
|
hostdata->max_rate[i] = DEFAULT_RATE;
|
| 712 |
|
|
hostdata->max_offset[i] = DEFAULT_SYNC_OFFSET;
|
| 713 |
|
|
}
|
| 714 |
|
|
|
| 715 |
|
|
/* overwrite defaults by LILO overrides */
|
| 716 |
|
|
for (i = 0; i < commandline_current; i++) {
|
| 717 |
|
|
if (overrides[i].host_scsi_id == instance->this_id) {
|
| 718 |
|
|
j = overrides[i].target_scsi_id;
|
| 719 |
|
|
hostdata->sync_en[j] = 1;
|
| 720 |
|
|
hostdata->max_rate[j] = overrides[i].max_rate;
|
| 721 |
|
|
hostdata->max_offset[j] = overrides[i].max_offset;
|
| 722 |
|
|
}
|
| 723 |
|
|
}
|
| 724 |
|
|
|
| 725 |
|
|
hostdata->sel_cmd = NULL;
|
| 726 |
|
|
hostdata->connected = NULL;
|
| 727 |
|
|
hostdata->issue_queue = NULL;
|
| 728 |
|
|
hostdata->disconnected_queue = NULL;
|
| 729 |
|
|
hostdata->in_reset = 0;
|
| 730 |
|
|
hostdata->aborted = 0;
|
| 731 |
|
|
hostdata->selecting = 0;
|
| 732 |
|
|
hostdata->disconnecting = 0;
|
| 733 |
|
|
hostdata->dma_busy = 0;
|
| 734 |
|
|
|
| 735 |
|
|
/* Set up an interrupt handler if we aren't already sharing an IRQ with another board */
|
| 736 |
|
|
for (search = first_host;
|
| 737 |
|
|
search && (((the_template != NULL) && (search->hostt != the_template)) ||
|
| 738 |
|
|
(search->irq != instance->irq) || (search == instance));
|
| 739 |
|
|
search = search->next);
|
| 740 |
|
|
if (!search) {
|
| 741 |
|
|
if (request_irq(instance->irq, do_AM53C974_intr, SA_SHIRQ, "AM53C974", instance)) {
|
| 742 |
|
|
printk("scsi%d: IRQ%d not free, detaching\n", instance->host_no, instance->irq);
|
| 743 |
|
|
scsi_unregister(instance);
|
| 744 |
|
|
return 0;
|
| 745 |
|
|
}
|
| 746 |
|
|
} else {
|
| 747 |
|
|
printk("scsi%d: using interrupt handler previously installed for scsi%d\n",
|
| 748 |
|
|
instance->host_no, search->host_no);
|
| 749 |
|
|
}
|
| 750 |
|
|
|
| 751 |
|
|
if (!the_template) {
|
| 752 |
|
|
the_template = instance->hostt;
|
| 753 |
|
|
first_instance = instance;
|
| 754 |
|
|
}
|
| 755 |
|
|
/* do hard reset */
|
| 756 |
|
|
AM53C974_write_8(CMDREG, CMDREG_RDEV); /* reset device */
|
| 757 |
|
|
udelay(5);
|
| 758 |
|
|
AM53C974_write_8(CMDREG, CMDREG_NOP);
|
| 759 |
|
|
AM53C974_write_8(CNTLREG1, CNTLREG1_DISR | instance->this_id);
|
| 760 |
|
|
AM53C974_write_8(CMDREG, CMDREG_RBUS); /* reset SCSI bus */
|
| 761 |
|
|
udelay(10);
|
| 762 |
|
|
AM53C974_config_after_reset(instance);
|
| 763 |
|
|
mdelay(500);
|
| 764 |
|
|
return (1);
|
| 765 |
|
|
}
|
| 766 |
|
|
|
| 767 |
|
|
/*********************************************************************
|
| 768 |
|
|
* Function : AM53C974_config_after_reset(struct Scsi_Host *instance) *
|
| 769 |
|
|
* *
|
| 770 |
|
|
* Purpose : initializes chip registers after reset *
|
| 771 |
|
|
* *
|
| 772 |
|
|
* Inputs : instance - which AM53C974 *
|
| 773 |
|
|
* *
|
| 774 |
|
|
* Returns : nothing *
|
| 775 |
|
|
**********************************************************************/
|
| 776 |
|
|
static void AM53C974_config_after_reset(struct Scsi_Host *instance)
|
| 777 |
|
|
{
|
| 778 |
|
|
AM53C974_local_declare();
|
| 779 |
|
|
AM53C974_setio(instance);
|
| 780 |
|
|
|
| 781 |
|
|
/* clear SCSI FIFO */
|
| 782 |
|
|
AM53C974_write_8(CMDREG, CMDREG_CFIFO);
|
| 783 |
|
|
|
| 784 |
|
|
/* configure device */
|
| 785 |
|
|
AM53C974_write_8(STIMREG, DEF_SCSI_TIMEOUT);
|
| 786 |
|
|
AM53C974_write_8(STPREG, DEF_STP & STPREG_STP);
|
| 787 |
|
|
AM53C974_write_8(SOFREG, (DEF_SOF_RAD << 6) | (DEF_SOF_RAA << 4));
|
| 788 |
|
|
AM53C974_write_8(CLKFREG, DEF_CLKF & CLKFREG_MASK);
|
| 789 |
|
|
AM53C974_write_8(CNTLREG1, (DEF_ETM << 7) | CNTLREG1_DISR | (DEF_PERE << 4) | instance->this_id);
|
| 790 |
|
|
AM53C974_write_8(CNTLREG2, (DEF_ENF << 6));
|
| 791 |
|
|
AM53C974_write_8(CNTLREG3, (DEF_ADIDCHK << 7) | (DEF_FASTSCSI << 4) | (DEF_FASTCLK << 3));
|
| 792 |
|
|
AM53C974_write_8(CNTLREG4, (DEF_GLITCH << 6) | (DEF_PWD << 5) | (DEF_RAE << 3) | (DEF_RADE << 2) | CNTLREG4_RES);
|
| 793 |
|
|
}
|
| 794 |
|
|
|
| 795 |
|
|
/***********************************************************************
|
| 796 |
|
|
* Function : const char *AM53C974_info(struct Scsi_Host *instance) *
|
| 797 |
|
|
* *
|
| 798 |
|
|
* Purpose : return device driver information *
|
| 799 |
|
|
* *
|
| 800 |
|
|
* Inputs : instance - which AM53C974 *
|
| 801 |
|
|
* *
|
| 802 |
|
|
* Returns : info string *
|
| 803 |
|
|
************************************************************************/
|
| 804 |
|
|
static const char *AM53C974_info(struct Scsi_Host *instance)
|
| 805 |
|
|
{
|
| 806 |
|
|
static char info[100];
|
| 807 |
|
|
|
| 808 |
|
|
sprintf(info, "AM53/79C974 PCscsi driver rev. %d.%d; host I/O address: 0x%lx; irq: %d\n",
|
| 809 |
|
|
AM53C974_DRIVER_REVISION_MAJOR, AM53C974_DRIVER_REVISION_MINOR,
|
| 810 |
|
|
instance->io_port, instance->irq);
|
| 811 |
|
|
return (info);
|
| 812 |
|
|
}
|
| 813 |
|
|
|
| 814 |
|
|
/**************************************************************************
|
| 815 |
|
|
* Function : int AM53C974_command (Scsi_Cmnd *SCpnt) *
|
| 816 |
|
|
* *
|
| 817 |
|
|
* Purpose : the unqueued SCSI command function, replaced by the *
|
| 818 |
|
|
* AM53C974_queue_command function *
|
| 819 |
|
|
* *
|
| 820 |
|
|
* Inputs : SCpnt - pointer to command structure *
|
| 821 |
|
|
* *
|
| 822 |
|
|
* Returns :status, see hosts.h for details *
|
| 823 |
|
|
***************************************************************************/
|
| 824 |
|
|
static int AM53C974_command(Scsi_Cmnd * SCpnt)
|
| 825 |
|
|
{
|
| 826 |
|
|
DEB(printk("AM53C974_command called\n"));
|
| 827 |
|
|
return 0;
|
| 828 |
|
|
}
|
| 829 |
|
|
|
| 830 |
|
|
/**************************************************************************
|
| 831 |
|
|
* Function : void initialize_SCp(Scsi_Cmnd *cmd) *
|
| 832 |
|
|
* *
|
| 833 |
|
|
* Purpose : initialize the saved data pointers for cmd to point to the *
|
| 834 |
|
|
* start of the buffer. *
|
| 835 |
|
|
* *
|
| 836 |
|
|
* Inputs : cmd - Scsi_Cmnd structure to have pointers reset. *
|
| 837 |
|
|
* *
|
| 838 |
|
|
* Returns : nothing *
|
| 839 |
|
|
**************************************************************************/
|
| 840 |
|
|
static __inline__ void initialize_SCp(Scsi_Cmnd * cmd)
|
| 841 |
|
|
{
|
| 842 |
|
|
if (cmd->use_sg) {
|
| 843 |
|
|
cmd->SCp.buffer = (struct scatterlist *) cmd->buffer;
|
| 844 |
|
|
cmd->SCp.buffers_residual = cmd->use_sg - 1;
|
| 845 |
|
|
cmd->SCp.ptr = (char *) cmd->SCp.buffer->address;
|
| 846 |
|
|
cmd->SCp.this_residual = cmd->SCp.buffer->length;
|
| 847 |
|
|
} else {
|
| 848 |
|
|
cmd->SCp.buffer = NULL;
|
| 849 |
|
|
cmd->SCp.buffers_residual = 0;
|
| 850 |
|
|
cmd->SCp.ptr = (char *) cmd->request_buffer;
|
| 851 |
|
|
cmd->SCp.this_residual = cmd->request_bufflen;
|
| 852 |
|
|
}
|
| 853 |
|
|
}
|
| 854 |
|
|
|
| 855 |
|
|
/**************************************************************************
|
| 856 |
|
|
* Function : run_main(void) *
|
| 857 |
|
|
* *
|
| 858 |
|
|
* Purpose : insure that the coroutine is running and will process our *
|
| 859 |
|
|
* request. main_running is checked/set here (in an inline *
|
| 860 |
|
|
* function rather than in AM53C974_main itself to reduce the *
|
| 861 |
|
|
* chances of stack overflow. *
|
| 862 |
|
|
* *
|
| 863 |
|
|
* *
|
| 864 |
|
|
* Inputs : none *
|
| 865 |
|
|
* *
|
| 866 |
|
|
* Returns : nothing *
|
| 867 |
|
|
**************************************************************************/
|
| 868 |
|
|
static __inline__ void run_main(void)
|
| 869 |
|
|
{
|
| 870 |
|
|
unsigned long flags;
|
| 871 |
|
|
save_flags(flags);
|
| 872 |
|
|
cli();
|
| 873 |
|
|
if (!main_running) {
|
| 874 |
|
|
/* main_running is cleared in AM53C974_main once it can't do
|
| 875 |
|
|
more work, and AM53C974_main exits with interrupts disabled. */
|
| 876 |
|
|
main_running = 1;
|
| 877 |
|
|
AM53C974_main();
|
| 878 |
|
|
}
|
| 879 |
|
|
restore_flags(flags);
|
| 880 |
|
|
}
|
| 881 |
|
|
|
| 882 |
|
|
/**************************************************************************
|
| 883 |
|
|
* Function : int AM53C974_queue_command(Scsi_Cmnd *cmd, void (*done)(Scsi_Cmnd *))
|
| 884 |
|
|
*
|
| 885 |
|
|
* Purpose : writes SCSI command into AM53C974 FIFO
|
| 886 |
|
|
*
|
| 887 |
|
|
* Inputs : cmd - SCSI command, done - function called on completion, with
|
| 888 |
|
|
* a pointer to the command descriptor.
|
| 889 |
|
|
*
|
| 890 |
|
|
* Returns : status, see hosts.h for details
|
| 891 |
|
|
*
|
| 892 |
|
|
* Side effects :
|
| 893 |
|
|
* cmd is added to the per instance issue_queue, with minor
|
| 894 |
|
|
* twiddling done to the host specific fields of cmd. If the
|
| 895 |
|
|
* main coroutine is not running, it is restarted.
|
| 896 |
|
|
**************************************************************************/
|
| 897 |
|
|
static int AM53C974_queue_command(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *))
|
| 898 |
|
|
{
|
| 899 |
|
|
unsigned long flags;
|
| 900 |
|
|
struct Scsi_Host *instance = cmd->host;
|
| 901 |
|
|
struct AM53C974_hostdata *hostdata = (struct AM53C974_hostdata *) instance->hostdata;
|
| 902 |
|
|
Scsi_Cmnd *tmp;
|
| 903 |
|
|
|
| 904 |
|
|
save_flags(flags);
|
| 905 |
|
|
cli();
|
| 906 |
|
|
DEB_QUEUE(printk(SEPARATOR_LINE));
|
| 907 |
|
|
DEB_QUEUE(printk("scsi%d: AM53C974_queue_command called\n", instance->host_no));
|
| 908 |
|
|
DEB_QUEUE(printk("cmd=%02x target=%02x lun=%02x bufflen=%d use_sg = %02x\n",
|
| 909 |
|
|
cmd->cmnd[0], cmd->target, cmd->lun, cmd->request_bufflen, cmd->use_sg));
|
| 910 |
|
|
|
| 911 |
|
|
/* We use the host_scribble field as a pointer to the next command in a queue */
|
| 912 |
|
|
cmd->host_scribble = NULL;
|
| 913 |
|
|
cmd->scsi_done = done;
|
| 914 |
|
|
cmd->result = 0;
|
| 915 |
|
|
cmd->device->disconnect = 0;
|
| 916 |
|
|
|
| 917 |
|
|
/* Insert the cmd into the issue queue. Note that REQUEST SENSE
|
| 918 |
|
|
* commands are added to the head of the queue since any command will
|
| 919 |
|
|
* clear the contingent allegiance condition that exists and the
|
| 920 |
|
|
* sense data is only guaranteed to be valid while the condition exists. */
|
| 921 |
|
|
if (!(hostdata->issue_queue) || (cmd->cmnd[0] == REQUEST_SENSE)) {
|
| 922 |
|
|
LIST(cmd, hostdata->issue_queue);
|
| 923 |
|
|
cmd->host_scribble = (unsigned char *) hostdata->issue_queue;
|
| 924 |
|
|
hostdata->issue_queue = cmd;
|
| 925 |
|
|
} else {
|
| 926 |
|
|
for (tmp = (Scsi_Cmnd *) hostdata->issue_queue; tmp->host_scribble;
|
| 927 |
|
|
tmp = (Scsi_Cmnd *) tmp->host_scribble);
|
| 928 |
|
|
LIST(cmd, tmp);
|
| 929 |
|
|
tmp->host_scribble = (unsigned char *) cmd;
|
| 930 |
|
|
}
|
| 931 |
|
|
|
| 932 |
|
|
DEB_QUEUE(printk("scsi%d : command added to %s of queue\n", instance->host_no,
|
| 933 |
|
|
(cmd->cmnd[0] == REQUEST_SENSE) ? "head" : "tail"));
|
| 934 |
|
|
|
| 935 |
|
|
/* Run the coroutine if it isn't already running. */
|
| 936 |
|
|
run_main();
|
| 937 |
|
|
restore_flags(flags);
|
| 938 |
|
|
return 0;
|
| 939 |
|
|
}
|
| 940 |
|
|
|
| 941 |
|
|
/**************************************************************************
|
| 942 |
|
|
* Function : AM53C974_main (void)
|
| 943 |
|
|
*
|
| 944 |
|
|
* Purpose : AM53C974_main is a coroutine that runs as long as more work can
|
| 945 |
|
|
* be done on the AM53C974 host adapters in a system. Both
|
| 946 |
|
|
* AM53C974_queue_command() and AM53C974_intr() will try to start it
|
| 947 |
|
|
* in case it is not running.
|
| 948 |
|
|
*
|
| 949 |
|
|
* NOTE : AM53C974_main exits with interrupts *disabled*, the caller should
|
| 950 |
|
|
* reenable them. This prevents reentrancy and kernel stack overflow.
|
| 951 |
|
|
**************************************************************************/
|
| 952 |
|
|
static void AM53C974_main(void)
|
| 953 |
|
|
{
|
| 954 |
|
|
AM53C974_local_declare();
|
| 955 |
|
|
unsigned long flags;
|
| 956 |
|
|
Scsi_Cmnd *tmp, *prev;
|
| 957 |
|
|
struct Scsi_Host *instance;
|
| 958 |
|
|
struct AM53C974_hostdata *hostdata;
|
| 959 |
|
|
int done;
|
| 960 |
|
|
|
| 961 |
|
|
/* We run (with interrupts disabled) until we're sure that none of
|
| 962 |
|
|
* the host adapters have anything that can be done, at which point
|
| 963 |
|
|
* we set main_running to 0 and exit. */
|
| 964 |
|
|
|
| 965 |
|
|
save_flags(flags);
|
| 966 |
|
|
cli(); /* Freeze request queues */
|
| 967 |
|
|
do {
|
| 968 |
|
|
done = 1;
|
| 969 |
|
|
for (instance = first_instance; instance && instance->hostt == the_template;
|
| 970 |
|
|
instance = instance->next) {
|
| 971 |
|
|
hostdata = (struct AM53C974_hostdata *) instance->hostdata;
|
| 972 |
|
|
AM53C974_setio(instance);
|
| 973 |
|
|
/* start to select target if we are not connected and not in the
|
| 974 |
|
|
selection process */
|
| 975 |
|
|
if (!hostdata->connected && !hostdata->sel_cmd) {
|
| 976 |
|
|
/* Search through the issue_queue for a command destined for a target
|
| 977 |
|
|
that is not busy. */
|
| 978 |
|
|
for (tmp = (Scsi_Cmnd *) hostdata->issue_queue, prev = NULL; tmp;
|
| 979 |
|
|
prev = tmp, tmp = (Scsi_Cmnd *) tmp->host_scribble) {
|
| 980 |
|
|
/* When we find one, remove it from the issue queue. */
|
| 981 |
|
|
if (!(hostdata->busy[tmp->target] & (1 << tmp->lun))) {
|
| 982 |
|
|
if (prev) {
|
| 983 |
|
|
REMOVE(prev, (Scsi_Cmnd *) (prev->host_scribble), tmp,
|
| 984 |
|
|
(Scsi_Cmnd *) (tmp->host_scribble));
|
| 985 |
|
|
prev->host_scribble = tmp->host_scribble;
|
| 986 |
|
|
} else {
|
| 987 |
|
|
REMOVE(-1, hostdata->issue_queue, tmp, tmp->host_scribble);
|
| 988 |
|
|
hostdata->issue_queue = (Scsi_Cmnd *) tmp->host_scribble;
|
| 989 |
|
|
}
|
| 990 |
|
|
tmp->host_scribble = NULL;
|
| 991 |
|
|
|
| 992 |
|
|
/* go into selection mode, disable reselection and wait for
|
| 993 |
|
|
SO interrupt which will continue with the selection process */
|
| 994 |
|
|
hostdata->selecting = 1;
|
| 995 |
|
|
hostdata->sel_cmd = tmp;
|
| 996 |
|
|
AM53C974_write_8(CMDREG, CMDREG_DSR);
|
| 997 |
|
|
break;
|
| 998 |
|
|
} /* if target/lun is not busy */
|
| 999 |
|
|
} /* for */
|
| 1000 |
|
|
}
|
| 1001 |
|
|
/* if (!hostdata->connected) */
|
| 1002 |
|
|
else {
|
| 1003 |
|
|
DEB(printk("main: connected; cmd = 0x%lx, sel_cmd = 0x%lx\n",
|
| 1004 |
|
|
(long) hostdata->connected, (long) hostdata->sel_cmd));
|
| 1005 |
|
|
}
|
| 1006 |
|
|
} /* for instance */
|
| 1007 |
|
|
} while (!done);
|
| 1008 |
|
|
main_running = 0;
|
| 1009 |
|
|
restore_flags(flags);
|
| 1010 |
|
|
}
|
| 1011 |
|
|
|
| 1012 |
|
|
/************************************************************************
|
| 1013 |
|
|
* Function : AM53C974_intr(int irq, void *dev_id, struct pt_regs *regs) *
|
| 1014 |
|
|
* *
|
| 1015 |
|
|
* Purpose : interrupt handler *
|
| 1016 |
|
|
* *
|
| 1017 |
|
|
* Inputs : irq - interrupt line, regs - ? *
|
| 1018 |
|
|
* *
|
| 1019 |
|
|
* Returns : nothing *
|
| 1020 |
|
|
************************************************************************/
|
| 1021 |
|
|
static void do_AM53C974_intr(int irq, void *dev_id, struct pt_regs *regs)
|
| 1022 |
|
|
{
|
| 1023 |
|
|
unsigned long flags;
|
| 1024 |
|
|
|
| 1025 |
|
|
spin_lock_irqsave(&io_request_lock, flags);
|
| 1026 |
|
|
AM53C974_intr(irq, dev_id, regs);
|
| 1027 |
|
|
spin_unlock_irqrestore(&io_request_lock, flags);
|
| 1028 |
|
|
}
|
| 1029 |
|
|
|
| 1030 |
|
|
/************************************************************************
|
| 1031 |
|
|
* Function : AM53C974_intr(int irq, void *dev_id, struct pt_regs *regs) *
|
| 1032 |
|
|
* *
|
| 1033 |
|
|
* Purpose : interrupt handler *
|
| 1034 |
|
|
* *
|
| 1035 |
|
|
* Inputs : irq - interrupt line, regs - ? *
|
| 1036 |
|
|
* *
|
| 1037 |
|
|
* Returns : nothing *
|
| 1038 |
|
|
************************************************************************/
|
| 1039 |
|
|
static void AM53C974_intr(int irq, void *dev_id, struct pt_regs *regs)
|
| 1040 |
|
|
{
|
| 1041 |
|
|
AM53C974_local_declare();
|
| 1042 |
|
|
struct Scsi_Host *instance;
|
| 1043 |
|
|
struct AM53C974_hostdata *hostdata;
|
| 1044 |
|
|
unsigned char cmdreg, dmastatus, statreg, isreg, instreg, cfifo;
|
| 1045 |
|
|
|
| 1046 |
|
|
/* find AM53C974 hostadapter responsible for this interrupt */
|
| 1047 |
|
|
for (instance = first_instance; instance; instance = instance->next)
|
| 1048 |
|
|
if ((instance->irq == irq) && (instance->hostt == the_template))
|
| 1049 |
|
|
goto FOUND;
|
| 1050 |
|
|
return;
|
| 1051 |
|
|
|
| 1052 |
|
|
/* found; now decode and process */
|
| 1053 |
|
|
FOUND:
|
| 1054 |
|
|
hostdata = (struct AM53C974_hostdata *) instance->hostdata;
|
| 1055 |
|
|
AM53C974_setio(instance);
|
| 1056 |
|
|
dmastatus = AM53C974_read_8(DMASTATUS);
|
| 1057 |
|
|
|
| 1058 |
|
|
DEB_INTR(printk(SEPARATOR_LINE));
|
| 1059 |
|
|
DEB_INTR(printk("AM53C974 interrupt; dmastatus=0x%02x\n", dmastatus));
|
| 1060 |
|
|
KEYWAIT();
|
| 1061 |
|
|
|
| 1062 |
|
|
/*** DMA related interrupts ***/
|
| 1063 |
|
|
if (hostdata->connected && (dmastatus & (DMASTATUS_ERROR | DMASTATUS_PWDN |
|
| 1064 |
|
|
DMASTATUS_ABORT))) {
|
| 1065 |
|
|
/* DMA error or POWERDOWN */
|
| 1066 |
|
|
printk("scsi%d: DMA error or powerdown; dmastatus: 0x%02x\n",
|
| 1067 |
|
|
instance->host_no, dmastatus);
|
| 1068 |
|
|
#ifdef AM53C974_DEBUG
|
| 1069 |
|
|
deb_stop = 1;
|
| 1070 |
|
|
#endif
|
| 1071 |
|
|
panic("scsi%d: cannot recover\n", instance->host_no);
|
| 1072 |
|
|
}
|
| 1073 |
|
|
if (hostdata->connected && (dmastatus & DMASTATUS_DONE)) {
|
| 1074 |
|
|
/* DMA transfer done */
|
| 1075 |
|
|
unsigned long residual;
|
| 1076 |
|
|
unsigned long flags;
|
| 1077 |
|
|
save_flags(flags);
|
| 1078 |
|
|
cli();
|
| 1079 |
|
|
if (!(AM53C974_read_8(DMACMD) & DMACMD_DIR)) {
|
| 1080 |
|
|
do {
|
| 1081 |
|
|
dmastatus = AM53C974_read_8(DMASTATUS);
|
| 1082 |
|
|
residual = AM53C974_read_8(CTCLREG) | (AM53C974_read_8(CTCMREG) << 8) |
|
| 1083 |
|
|
(AM53C974_read_8(CTCHREG) << 16);
|
| 1084 |
|
|
residual += AM53C974_read_8(CFIREG) & CFIREG_CF;
|
| 1085 |
|
|
} while (!(dmastatus & DMASTATUS_SCSIINT) && residual);
|
| 1086 |
|
|
residual = AM53C974_read_8(CTCLREG) | (AM53C974_read_8(CTCMREG) << 8) |
|
| 1087 |
|
|
(AM53C974_read_8(CTCHREG) << 16);
|
| 1088 |
|
|
residual += AM53C974_read_8(CFIREG) & CFIREG_CF;
|
| 1089 |
|
|
} else
|
| 1090 |
|
|
residual = 0;
|
| 1091 |
|
|
hostdata->connected->SCp.ptr += hostdata->connected->SCp.this_residual - residual;
|
| 1092 |
|
|
hostdata->connected->SCp.this_residual = residual;
|
| 1093 |
|
|
|
| 1094 |
|
|
AM53C974_write_8(DMACMD, DMACMD_IDLE);
|
| 1095 |
|
|
|
| 1096 |
|
|
/* if service request missed before, process it now (ugly) */
|
| 1097 |
|
|
if (hostdata->dma_busy) {
|
| 1098 |
|
|
hostdata->dma_busy = 0;
|
| 1099 |
|
|
cmdreg = AM53C974_read_8(CMDREG);
|
| 1100 |
|
|
statreg = AM53C974_read_8(STATREG);
|
| 1101 |
|
|
isreg = AM53C974_read_8(ISREG);
|
| 1102 |
|
|
instreg = AM53C974_read_8(INSTREG);
|
| 1103 |
|
|
cfifo = AM53C974_cfifo();
|
| 1104 |
|
|
AM53C974_information_transfer(instance, statreg, isreg, instreg, cfifo,
|
| 1105 |
|
|
dmastatus);
|
| 1106 |
|
|
}
|
| 1107 |
|
|
restore_flags(flags);
|
| 1108 |
|
|
}
|
| 1109 |
|
|
if (!(dmastatus & DMASTATUS_SCSIINT)) {
|
| 1110 |
|
|
return;
|
| 1111 |
|
|
}
|
| 1112 |
|
|
/*** SCSI related interrupts ***/
|
| 1113 |
|
|
cmdreg = AM53C974_read_8(CMDREG);
|
| 1114 |
|
|
statreg = AM53C974_read_8(STATREG);
|
| 1115 |
|
|
isreg = AM53C974_read_8(ISREG);
|
| 1116 |
|
|
instreg = AM53C974_read_8(INSTREG);
|
| 1117 |
|
|
cfifo = AM53C974_cfifo();
|
| 1118 |
|
|
|
| 1119 |
|
|
DEB_INTR(printk("scsi%d: statreg: 0x%02x; isreg: 0x%02x; instreg: 0x%02x; cfifo: 0x%02x\n",
|
| 1120 |
|
|
instance->host_no, statreg, isreg, instreg, cfifo));
|
| 1121 |
|
|
|
| 1122 |
|
|
if (statreg & STATREG_PE) {
|
| 1123 |
|
|
/* parity error */
|
| 1124 |
|
|
#ifdef AM53C974_DEBUG
|
| 1125 |
|
|
deb_stop = 1;
|
| 1126 |
|
|
#endif
|
| 1127 |
|
|
printk("scsi%d : PARITY error\n", instance->host_no);
|
| 1128 |
|
|
if (hostdata->connected)
|
| 1129 |
|
|
hostdata->sync_off[hostdata->connected->target] = 0; /* setup asynchronous transfer */
|
| 1130 |
|
|
hostdata->aborted = 1;
|
| 1131 |
|
|
}
|
| 1132 |
|
|
if (statreg & STATREG_IOE) {
|
| 1133 |
|
|
/* illegal operation error */
|
| 1134 |
|
|
#ifdef AM53C974_DEBUG
|
| 1135 |
|
|
deb_stop = 1;
|
| 1136 |
|
|
#endif
|
| 1137 |
|
|
printk("scsi%d : ILLEGAL OPERATION error\n", instance->host_no);
|
| 1138 |
|
|
printk("cmdreg: 0x%02x; dmacmd: 0x%02x; statreg: 0x%02x; \n"
|
| 1139 |
|
|
"isreg: 0x%02x; instreg: 0x%02x; cfifo: 0x%02x\n",
|
| 1140 |
|
|
cmdreg, AM53C974_read_8(DMACMD), statreg, isreg, instreg, cfifo);
|
| 1141 |
|
|
}
|
| 1142 |
|
|
if (hostdata->in_reset && (instreg & INSTREG_SRST)) {
|
| 1143 |
|
|
unsigned long flags;
|
| 1144 |
|
|
/* RESET INTERRUPT */
|
| 1145 |
|
|
#ifdef AM53C974_DEBUG
|
| 1146 |
|
|
deb_stop = 1;
|
| 1147 |
|
|
#endif
|
| 1148 |
|
|
DEB(printk("Bus reset interrupt received\n"));
|
| 1149 |
|
|
AM53C974_intr_bus_reset(instance);
|
| 1150 |
|
|
save_flags(flags);
|
| 1151 |
|
|
cli();
|
| 1152 |
|
|
if (hostdata->connected) {
|
| 1153 |
|
|
hostdata->connected->result = DID_RESET << 16;
|
| 1154 |
|
|
hostdata->connected->scsi_done((Scsi_Cmnd *) hostdata->connected);
|
| 1155 |
|
|
hostdata->connected = NULL;
|
| 1156 |
|
|
} else {
|
| 1157 |
|
|
if (hostdata->sel_cmd) {
|
| 1158 |
|
|
hostdata->sel_cmd->result = DID_RESET << 16;
|
| 1159 |
|
|
hostdata->sel_cmd->scsi_done((Scsi_Cmnd *) hostdata->sel_cmd);
|
| 1160 |
|
|
hostdata->sel_cmd = NULL;
|
| 1161 |
|
|
}
|
| 1162 |
|
|
}
|
| 1163 |
|
|
restore_flags(flags);
|
| 1164 |
|
|
if (hostdata->in_reset == 1)
|
| 1165 |
|
|
goto EXIT;
|
| 1166 |
|
|
else
|
| 1167 |
|
|
return;
|
| 1168 |
|
|
}
|
| 1169 |
|
|
if (instreg & INSTREG_ICMD) {
|
| 1170 |
|
|
/* INVALID COMMAND INTERRUPT */
|
| 1171 |
|
|
#ifdef AM53C974_DEBUG
|
| 1172 |
|
|
deb_stop = 1;
|
| 1173 |
|
|
#endif
|
| 1174 |
|
|
printk("scsi%d: Invalid command interrupt\n", instance->host_no);
|
| 1175 |
|
|
printk("cmdreg: 0x%02x; dmacmd: 0x%02x; statreg: 0x%02x; dmastatus: 0x%02x; \n"
|
| 1176 |
|
|
"isreg: 0x%02x; instreg: 0x%02x; cfifo: 0x%02x\n",
|
| 1177 |
|
|
cmdreg, AM53C974_read_8(DMACMD), statreg, dmastatus, isreg, instreg, cfifo);
|
| 1178 |
|
|
panic("scsi%d: cannot recover\n", instance->host_no);
|
| 1179 |
|
|
}
|
| 1180 |
|
|
if (instreg & INSTREG_DIS) {
|
| 1181 |
|
|
unsigned long flags;
|
| 1182 |
|
|
/* DISCONNECT INTERRUPT */
|
| 1183 |
|
|
DEB_INTR(printk("Disconnect interrupt received; "));
|
| 1184 |
|
|
save_flags(flags);
|
| 1185 |
|
|
cli();
|
| 1186 |
|
|
AM53C974_intr_disconnect(instance);
|
| 1187 |
|
|
restore_flags(flags);
|
| 1188 |
|
|
goto EXIT;
|
| 1189 |
|
|
}
|
| 1190 |
|
|
if (instreg & INSTREG_RESEL) {
|
| 1191 |
|
|
unsigned long flags;
|
| 1192 |
|
|
/* RESELECTION INTERRUPT */
|
| 1193 |
|
|
DEB_INTR(printk("Reselection interrupt received\n"));
|
| 1194 |
|
|
save_flags(flags);
|
| 1195 |
|
|
cli();
|
| 1196 |
|
|
AM53C974_intr_reselect(instance, statreg);
|
| 1197 |
|
|
restore_flags(flags);
|
| 1198 |
|
|
goto EXIT;
|
| 1199 |
|
|
}
|
| 1200 |
|
|
if (instreg & INSTREG_SO) {
|
| 1201 |
|
|
DEB_INTR(printk("Successful operation interrupt received\n"));
|
| 1202 |
|
|
if (hostdata->selecting) {
|
| 1203 |
|
|
unsigned long flags;
|
| 1204 |
|
|
DEB_INTR(printk("DSR completed, starting select\n"));
|
| 1205 |
|
|
save_flags(flags);
|
| 1206 |
|
|
cli();
|
| 1207 |
|
|
AM53C974_select(instance, (Scsi_Cmnd *) hostdata->sel_cmd,
|
| 1208 |
|
|
(hostdata->sel_cmd->cmnd[0] == REQUEST_SENSE) ?
|
| 1209 |
|
|
TAG_NONE : TAG_NEXT);
|
| 1210 |
|
|
hostdata->selecting = 0;
|
| 1211 |
|
|
AM53C974_set_sync(instance, hostdata->sel_cmd->target);
|
| 1212 |
|
|
restore_flags(flags);
|
| 1213 |
|
|
return;
|
| 1214 |
|
|
}
|
| 1215 |
|
|
if (hostdata->sel_cmd != NULL) {
|
| 1216 |
|
|
if (((isreg & ISREG_IS) != ISREG_OK_NO_STOP) &&
|
| 1217 |
|
|
((isreg & ISREG_IS) != ISREG_OK_STOP)) {
|
| 1218 |
|
|
unsigned long flags;
|
| 1219 |
|
|
/* UNSUCCESSFUL SELECTION */
|
| 1220 |
|
|
DEB_INTR(printk("unsuccessful selection\n"));
|
| 1221 |
|
|
save_flags(flags);
|
| 1222 |
|
|
cli();
|
| 1223 |
|
|
hostdata->dma_busy = 0;
|
| 1224 |
|
|
LIST(hostdata->sel_cmd, hostdata->issue_queue);
|
| 1225 |
|
|
hostdata->sel_cmd->host_scribble = (unsigned char *) hostdata->issue_queue;
|
| 1226 |
|
|
hostdata->issue_queue = hostdata->sel_cmd;
|
| 1227 |
|
|
hostdata->sel_cmd = NULL;
|
| 1228 |
|
|
hostdata->selecting = 0;
|
| 1229 |
|
|
restore_flags(flags);
|
| 1230 |
|
|
goto EXIT;
|
| 1231 |
|
|
} else {
|
| 1232 |
|
|
unsigned long flags;
|
| 1233 |
|
|
/* SUCCESSFUL SELECTION */
|
| 1234 |
|
|
DEB(printk("successful selection; cmd=0x%02lx\n", (long) hostdata->sel_cmd));
|
| 1235 |
|
|
save_flags(flags);
|
| 1236 |
|
|
cli();
|
| 1237 |
|
|
hostdata->dma_busy = 0;
|
| 1238 |
|
|
hostdata->disconnecting = 0;
|
| 1239 |
|
|
hostdata->connected = hostdata->sel_cmd;
|
| 1240 |
|
|
hostdata->sel_cmd = NULL;
|
| 1241 |
|
|
hostdata->selecting = 0;
|
| 1242 |
|
|
#ifdef SCSI2
|
| 1243 |
|
|
if (!hostdata->connected->device->tagged_queue)
|
| 1244 |
|
|
#endif
|
| 1245 |
|
|
hostdata->busy[hostdata->connected->target] |= (1 << hostdata->connected->lun);
|
| 1246 |
|
|
/* very strange -- use_sg is sometimes nonzero for request sense commands !! */
|
| 1247 |
|
|
if ((hostdata->connected->cmnd[0] == REQUEST_SENSE) && hostdata->connected->use_sg) {
|
| 1248 |
|
|
DEB(printk("scsi%d: REQUEST_SENSE command with nonzero use_sg\n", instance->host_no));
|
| 1249 |
|
|
KEYWAIT();
|
| 1250 |
|
|
hostdata->connected->use_sg = 0;
|
| 1251 |
|
|
}
|
| 1252 |
|
|
initialize_SCp((Scsi_Cmnd *) hostdata->connected);
|
| 1253 |
|
|
hostdata->connected->SCp.phase = PHASE_CMDOUT;
|
| 1254 |
|
|
AM53C974_information_transfer(instance, statreg, isreg, instreg, cfifo, dmastatus);
|
| 1255 |
|
|
restore_flags(flags);
|
| 1256 |
|
|
return;
|
| 1257 |
|
|
}
|
| 1258 |
|
|
} else {
|
| 1259 |
|
|
unsigned long flags;
|
| 1260 |
|
|
save_flags(flags);
|
| 1261 |
|
|
cli();
|
| 1262 |
|
|
AM53C974_information_transfer(instance, statreg, isreg, instreg, cfifo, dmastatus);
|
| 1263 |
|
|
restore_flags(flags);
|
| 1264 |
|
|
return;
|
| 1265 |
|
|
}
|
| 1266 |
|
|
}
|
| 1267 |
|
|
if (instreg & INSTREG_SR) {
|
| 1268 |
|
|
DEB_INTR(printk("Service request interrupt received, "));
|
| 1269 |
|
|
if (hostdata->connected) {
|
| 1270 |
|
|
unsigned long flags;
|
| 1271 |
|
|
DEB_INTR(printk("calling information_transfer\n"));
|
| 1272 |
|
|
save_flags(flags);
|
| 1273 |
|
|
cli();
|
| 1274 |
|
|
AM53C974_information_transfer(instance, statreg, isreg, instreg, cfifo, dmastatus);
|
| 1275 |
|
|
restore_flags(flags);
|
| 1276 |
|
|
} else {
|
| 1277 |
|
|
printk("scsi%d: weird: service request when no command connected\n", instance->host_no);
|
| 1278 |
|
|
AM53C974_write_8(CMDREG, CMDREG_CFIFO);
|
| 1279 |
|
|
} /* clear FIFO */
|
| 1280 |
|
|
return;
|
| 1281 |
|
|
}
|
| 1282 |
|
|
EXIT:
|
| 1283 |
|
|
DEB_INTR(printk("intr: starting main\n"));
|
| 1284 |
|
|
run_main();
|
| 1285 |
|
|
DEB_INTR(printk("end of intr\n"));
|
| 1286 |
|
|
}
|
| 1287 |
|
|
|
| 1288 |
|
|
/**************************************************************************
|
| 1289 |
|
|
* Function : AM53C974_intr_disconnect(struct Scsi_Host *instance)
|
| 1290 |
|
|
*
|
| 1291 |
|
|
* Purpose : manage target disconnection
|
| 1292 |
|
|
*
|
| 1293 |
|
|
* Inputs : instance -- which AM53C974
|
| 1294 |
|
|
*
|
| 1295 |
|
|
* Returns : nothing
|
| 1296 |
|
|
**************************************************************************/
|
| 1297 |
|
|
static void AM53C974_intr_disconnect(struct Scsi_Host *instance)
|
| 1298 |
|
|
{
|
| 1299 |
|
|
AM53C974_local_declare();
|
| 1300 |
|
|
struct AM53C974_hostdata *hostdata = (struct AM53C974_hostdata *) instance->hostdata;
|
| 1301 |
|
|
Scsi_Cmnd *cmd;
|
| 1302 |
|
|
AM53C974_setio(instance);
|
| 1303 |
|
|
|
| 1304 |
|
|
if (hostdata->sel_cmd != NULL) {
|
| 1305 |
|
|
/* normal selection timeout, typical for nonexisting targets */
|
| 1306 |
|
|
cmd = (Scsi_Cmnd *) hostdata->sel_cmd;
|
| 1307 |
|
|
DEB_INTR(printk("bad target\n"));
|
| 1308 |
|
|
cmd->result = DID_BAD_TARGET << 16;
|
| 1309 |
|
|
goto EXIT_FINISHED;
|
| 1310 |
|
|
}
|
| 1311 |
|
|
if (!hostdata->connected) {
|
| 1312 |
|
|
/* can happen if controller was reset, a device tried to reconnect,
|
| 1313 |
|
|
failed and disconnects now */
|
| 1314 |
|
|
AM53C974_write_8(CMDREG, CMDREG_CFIFO);
|
| 1315 |
|
|
return;
|
| 1316 |
|
|
}
|
| 1317 |
|
|
if (hostdata->disconnecting) {
|
| 1318 |
|
|
/* target sent disconnect message, so we are prepared */
|
| 1319 |
|
|
cmd = (Scsi_Cmnd *) hostdata->connected;
|
| 1320 |
|
|
AM53C974_set_async(instance, cmd->target);
|
| 1321 |
|
|
DEB_INTR(printk("scsi%d : disc. from cmnd %d for ta %d, lun %d\n",
|
| 1322 |
|
|
instance->host_no, cmd->cmnd[0], cmd->target, cmd->lun));
|
| 1323 |
|
|
if (cmd->device->disconnect) {
|
| 1324 |
|
|
/* target wants to reselect later */
|
| 1325 |
|
|
DEB_INTR(printk("ok, re-enabling selection\n"));
|
| 1326 |
|
|
LIST(cmd, hostdata->disconnected_queue);
|
| 1327 |
|
|
cmd->host_scribble = (unsigned char *) hostdata->disconnected_queue;
|
| 1328 |
|
|
hostdata->disconnected_queue = cmd;
|
| 1329 |
|
|
DEB_QUEUE(printk("scsi%d : command for target %d lun %d this %d was moved from connected to"
|
| 1330 |
|
|
" the disconnected_queue\n", instance->host_no, cmd->target,
|
| 1331 |
|
|
cmd->lun, hostdata->disconnected_queue->SCp.this_residual));
|
| 1332 |
|
|
DEB_QUEUE(AM53C974_print_queues(instance));
|
| 1333 |
|
|
goto EXIT_UNFINISHED;
|
| 1334 |
|
|
} else {
|
| 1335 |
|
|
/* target does not want to reselect later, we are really finished */
|
| 1336 |
|
|
#ifdef AM53C974_DEBUG
|
| 1337 |
|
|
if (cmd->cmnd[0] == REQUEST_SENSE) {
|
| 1338 |
|
|
int i;
|
| 1339 |
|
|
printk("Request sense data dump:\n");
|
| 1340 |
|
|
for (i = 0; i < cmd->request_bufflen; i++) {
|
| 1341 |
|
|
printk("%02x ", *((char *) (cmd->request_buffer) + i));
|
| 1342 |
|
|
if (i && !(i % 16))
|
| 1343 |
|
|
printk("\n");
|
| 1344 |
|
|
}
|
| 1345 |
|
|
printk("\n");
|
| 1346 |
|
|
}
|
| 1347 |
|
|
#endif
|
| 1348 |
|
|
goto EXIT_FINISHED;
|
| 1349 |
|
|
} /* !cmd->device->disconnect */
|
| 1350 |
|
|
} /* if (hostdata->disconnecting) */
|
| 1351 |
|
|
/* no disconnect message received; unexpected disconnection */
|
| 1352 |
|
|
cmd = (Scsi_Cmnd *) hostdata->connected;
|
| 1353 |
|
|
if (cmd) {
|
| 1354 |
|
|
#ifdef AM53C974_DEBUG
|
| 1355 |
|
|
deb_stop = 1;
|
| 1356 |
|
|
#endif
|
| 1357 |
|
|
AM53C974_set_async(instance, cmd->target);
|
| 1358 |
|
|
printk("scsi%d: Unexpected disconnect; phase: %d; target: %d; this_residual: %d; buffers_residual: %d; message: %d\n",
|
| 1359 |
|
|
instance->host_no, cmd->SCp.phase, cmd->target, cmd->SCp.this_residual, cmd->SCp.buffers_residual,
|
| 1360 |
|
|
cmd->SCp.Message);
|
| 1361 |
|
|
printk("cmdreg: 0x%02x; statreg: 0x%02x; isreg: 0x%02x; cfifo: 0x%02x\n",
|
| 1362 |
|
|
AM53C974_read_8(CMDREG), AM53C974_read_8(STATREG), AM53C974_read_8(ISREG),
|
| 1363 |
|
|
AM53C974_read_8(CFIREG) & CFIREG_CF);
|
| 1364 |
|
|
|
| 1365 |
|
|
if ((hostdata->last_message[0] == EXTENDED_MESSAGE) &&
|
| 1366 |
|
|
(hostdata->last_message[2] == EXTENDED_SDTR)) {
|
| 1367 |
|
|
/* sync. negotiation was aborted, setup asynchronous transfer with target */
|
| 1368 |
|
|
hostdata->sync_off[cmd->target] = 0;
|
| 1369 |
|
|
}
|
| 1370 |
|
|
if (hostdata->aborted || hostdata->msgout[0] == ABORT)
|
| 1371 |
|
|
cmd->result = DID_ABORT << 16;
|
| 1372 |
|
|
else
|
| 1373 |
|
|
cmd->result = DID_ERROR << 16;
|
| 1374 |
|
|
goto EXIT_FINISHED;
|
| 1375 |
|
|
}
|
| 1376 |
|
|
EXIT_FINISHED:
|
| 1377 |
|
|
hostdata->aborted = 0;
|
| 1378 |
|
|
hostdata->msgout[0] = NOP;
|
| 1379 |
|
|
hostdata->sel_cmd = NULL;
|
| 1380 |
|
|
hostdata->connected = NULL;
|
| 1381 |
|
|
hostdata->selecting = 0;
|
| 1382 |
|
|
hostdata->disconnecting = 0;
|
| 1383 |
|
|
hostdata->dma_busy = 0;
|
| 1384 |
|
|
hostdata->busy[cmd->target] &= ~(1 << cmd->lun);
|
| 1385 |
|
|
AM53C974_write_8(CMDREG, CMDREG_CFIFO);
|
| 1386 |
|
|
DEB(printk("disconnect; issue_queue: 0x%lx, disconnected_queue: 0x%lx\n",
|
| 1387 |
|
|
(long) hostdata->issue_queue, (long) hostdata->disconnected_queue));
|
| 1388 |
|
|
cmd->scsi_done(cmd);
|
| 1389 |
|
|
|
| 1390 |
|
|
if (!hostdata->selecting) {
|
| 1391 |
|
|
AM53C974_set_async(instance, cmd->target);
|
| 1392 |
|
|
AM53C974_write_8(CMDREG, CMDREG_ESR);
|
| 1393 |
|
|
} /* allow reselect */
|
| 1394 |
|
|
return;
|
| 1395 |
|
|
|
| 1396 |
|
|
EXIT_UNFINISHED:
|
| 1397 |
|
|
hostdata->msgout[0] = NOP;
|
| 1398 |
|
|
hostdata->sel_cmd = NULL;
|
| 1399 |
|
|
hostdata->connected = NULL;
|
| 1400 |
|
|
hostdata->aborted = 0;
|
| 1401 |
|
|
hostdata->selecting = 0;
|
| 1402 |
|
|
hostdata->disconnecting = 0;
|
| 1403 |
|
|
hostdata->dma_busy = 0;
|
| 1404 |
|
|
DEB(printk("disconnect; issue_queue: 0x%lx, disconnected_queue: 0x%lx\n",
|
| 1405 |
|
|
(long) hostdata->issue_queue, (long) hostdata->disconnected_queue));
|
| 1406 |
|
|
if (!hostdata->selecting) {
|
| 1407 |
|
|
AM53C974_set_async(instance, cmd->target);
|
| 1408 |
|
|
AM53C974_write_8(CMDREG, CMDREG_ESR);
|
| 1409 |
|
|
} /* allow reselect */
|
| 1410 |
|
|
return;
|
| 1411 |
|
|
}
|
| 1412 |
|
|
|
| 1413 |
|
|
/**************************************************************************
|
| 1414 |
|
|
* Function : int AM53C974_sync_neg(struct Scsi_Host *instance, int target, unsigned char *msg)
|
| 1415 |
|
|
*
|
| 1416 |
|
|
* Purpose : setup message string for sync. negotiation
|
| 1417 |
|
|
*
|
| 1418 |
|
|
* Inputs : instance -- which AM53C974
|
| 1419 |
|
|
* target -- which SCSI target to deal with
|
| 1420 |
|
|
* msg -- input message string
|
| 1421 |
|
|
*
|
| 1422 |
|
|
* Returns : 0 if parameters accepted or 1 if not accepted
|
| 1423 |
|
|
*
|
| 1424 |
|
|
* Side effects: hostdata is changed
|
| 1425 |
|
|
*
|
| 1426 |
|
|
* Note: we assume here that fastclk is enabled
|
| 1427 |
|
|
**************************************************************************/
|
| 1428 |
|
|
static int AM53C974_sync_neg(struct Scsi_Host *instance, int target, unsigned char *msg)
|
| 1429 |
|
|
{
|
| 1430 |
|
|
AM53C974_local_declare();
|
| 1431 |
|
|
struct AM53C974_hostdata *hostdata = (struct AM53C974_hostdata *) instance->hostdata;
|
| 1432 |
|
|
int period, offset, i, rate, rate_rem;
|
| 1433 |
|
|
AM53C974_setio(instance);
|
| 1434 |
|
|
|
| 1435 |
|
|
period = (DEF_CLK * msg[3] * 8 + 1000) / 2000;
|
| 1436 |
|
|
if (period < MIN_PERIOD) {
|
| 1437 |
|
|
period = MIN_PERIOD;
|
| 1438 |
|
|
hostdata->msgout[3] = period / 4;
|
| 1439 |
|
|
} else if (period > MAX_PERIOD) {
|
| 1440 |
|
|
period = MAX_PERIOD;
|
| 1441 |
|
|
hostdata->msgout[3] = period / 4;
|
| 1442 |
|
|
} else
|
| 1443 |
|
|
hostdata->msgout[3] = msg[3];
|
| 1444 |
|
|
offset = msg[4];
|
| 1445 |
|
|
if (offset > MAX_OFFSET)
|
| 1446 |
|
|
offset = MAX_OFFSET;
|
| 1447 |
|
|
hostdata->msgout[4] = offset;
|
| 1448 |
|
|
hostdata->sync_per[target] = period;
|
| 1449 |
|
|
hostdata->sync_off[target] = offset;
|
| 1450 |
|
|
for (i = 0; i < 3; i++)
|
| 1451 |
|
|
hostdata->msgout[i] = msg[i];
|
| 1452 |
|
|
if ((hostdata->msgout[3] != msg[3]) || (msg[4] != offset))
|
| 1453 |
|
|
return (1);
|
| 1454 |
|
|
|
| 1455 |
|
|
rate = DEF_CLK / period;
|
| 1456 |
|
|
rate_rem = 10 * (DEF_CLK - period * rate) / period;
|
| 1457 |
|
|
|
| 1458 |
|
|
if (offset)
|
| 1459 |
|
|
printk("\ntarget %d: rate=%d.%d Mhz, synchronous, sync offset=%d bytes\n",
|
| 1460 |
|
|
target, rate, rate_rem, offset);
|
| 1461 |
|
|
else
|
| 1462 |
|
|
printk("\ntarget %d: rate=%d.%d Mhz, asynchronous\n", target, rate, rate_rem);
|
| 1463 |
|
|
|
| 1464 |
|
|
return (0);
|
| 1465 |
|
|
}
|
| 1466 |
|
|
|
| 1467 |
|
|
/**************************************************************************
|
| 1468 |
|
|
* Function : AM53C974_set_async(struct Scsi_Host *instance, int target)
|
| 1469 |
|
|
*
|
| 1470 |
|
|
* Purpose : put controller into async. mode
|
| 1471 |
|
|
*
|
| 1472 |
|
|
* Inputs : instance -- which AM53C974
|
| 1473 |
|
|
* target -- which SCSI target to deal with
|
| 1474 |
|
|
*
|
| 1475 |
|
|
* Returns : nothing
|
| 1476 |
|
|
**************************************************************************/
|
| 1477 |
|
|
static __inline__ void AM53C974_set_async(struct Scsi_Host *instance, int target)
|
| 1478 |
|
|
{
|
| 1479 |
|
|
AM53C974_local_declare();
|
| 1480 |
|
|
struct AM53C974_hostdata *hostdata = (struct AM53C974_hostdata *) instance->hostdata;
|
| 1481 |
|
|
AM53C974_setio(instance);
|
| 1482 |
|
|
|
| 1483 |
|
|
AM53C974_write_8(STPREG, hostdata->sync_per[target]);
|
| 1484 |
|
|
AM53C974_write_8(SOFREG, (DEF_SOF_RAD << 6) | (DEF_SOF_RAA << 4));
|
| 1485 |
|
|
}
|
| 1486 |
|
|
|
| 1487 |
|
|
/**************************************************************************
|
| 1488 |
|
|
* Function : AM53C974_set_sync(struct Scsi_Host *instance, int target)
|
| 1489 |
|
|
*
|
| 1490 |
|
|
* Purpose : put controller into sync. mode
|
| 1491 |
|
|
*
|
| 1492 |
|
|
* Inputs : instance -- which AM53C974
|
| 1493 |
|
|
* target -- which SCSI target to deal with
|
| 1494 |
|
|
*
|
| 1495 |
|
|
* Returns : nothing
|
| 1496 |
|
|
**************************************************************************/
|
| 1497 |
|
|
static __inline__ void AM53C974_set_sync(struct Scsi_Host *instance, int target)
|
| 1498 |
|
|
{
|
| 1499 |
|
|
AM53C974_local_declare();
|
| 1500 |
|
|
struct AM53C974_hostdata *hostdata = (struct AM53C974_hostdata *) instance->hostdata;
|
| 1501 |
|
|
AM53C974_setio(instance);
|
| 1502 |
|
|
|
| 1503 |
|
|
AM53C974_write_8(STPREG, hostdata->sync_per[target]);
|
| 1504 |
|
|
AM53C974_write_8(SOFREG, (SOFREG_SO & hostdata->sync_off[target]) |
|
| 1505 |
|
|
(DEF_SOF_RAD << 6) | (DEF_SOF_RAA << 4));
|
| 1506 |
|
|
}
|
| 1507 |
|
|
|
| 1508 |
|
|
/***********************************************************************
|
| 1509 |
|
|
* Function : AM53C974_information_transfer(struct Scsi_Host *instance, *
|
| 1510 |
|
|
* unsigned char statreg, unsigned char isreg, *
|
| 1511 |
|
|
* unsigned char instreg, unsigned char cfifo, *
|
| 1512 |
|
|
* unsigned char dmastatus) *
|
| 1513 |
|
|
* *
|
| 1514 |
|
|
* Purpose : handle phase changes *
|
| 1515 |
|
|
* *
|
| 1516 |
|
|
* Inputs : instance - which AM53C974 *
|
| 1517 |
|
|
* statreg - status register *
|
| 1518 |
|
|
* isreg - internal state register *
|
| 1519 |
|
|
* instreg - interrupt status register *
|
| 1520 |
|
|
* cfifo - number of bytes in FIFO *
|
| 1521 |
|
|
* dmastatus - dma status register *
|
| 1522 |
|
|
* *
|
| 1523 |
|
|
* Returns : nothing *
|
| 1524 |
|
|
************************************************************************/
|
| 1525 |
|
|
static void AM53C974_information_transfer(struct Scsi_Host *instance,
|
| 1526 |
|
|
unsigned char statreg, unsigned char isreg,
|
| 1527 |
|
|
unsigned char instreg, unsigned char cfifo,
|
| 1528 |
|
|
unsigned char dmastatus)
|
| 1529 |
|
|
{
|
| 1530 |
|
|
AM53C974_local_declare();
|
| 1531 |
|
|
struct AM53C974_hostdata *hostdata = (struct AM53C974_hostdata *) instance->hostdata;
|
| 1532 |
|
|
Scsi_Cmnd *cmd = (Scsi_Cmnd *) hostdata->connected;
|
| 1533 |
|
|
int ret, i, len, residual = -1;
|
| 1534 |
|
|
AM53C974_setio(instance);
|
| 1535 |
|
|
|
| 1536 |
|
|
DEB_INFO(printk(SEPARATOR_LINE));
|
| 1537 |
|
|
switch (statreg & STATREG_PHASE) { /* scsi phase */
|
| 1538 |
|
|
case PHASE_DATAOUT:
|
| 1539 |
|
|
DEB_INFO(printk("Dataout phase; cmd=0x%lx, sel_cmd=0x%lx, this_residual=%d, buffers_residual=%d\n",
|
| 1540 |
|
|
(long) hostdata->connected, (long) hostdata->sel_cmd, cmd->SCp.this_residual, cmd->SCp.buffers_residual));
|
| 1541 |
|
|
cmd->SCp.phase = PHASE_DATAOUT;
|
| 1542 |
|
|
goto PHASE_DATA_IO;
|
| 1543 |
|
|
|
| 1544 |
|
|
case PHASE_DATAIN:
|
| 1545 |
|
|
DEB_INFO(printk("Datain phase; cmd=0x%lx, sel_cmd=0x%lx, this_residual=%d, buffers_residual=%d\n",
|
| 1546 |
|
|
(long) hostdata->connected, (long) hostdata->sel_cmd, cmd->SCp.this_residual, cmd->SCp.buffers_residual));
|
| 1547 |
|
|
cmd->SCp.phase = PHASE_DATAIN;
|
| 1548 |
|
|
PHASE_DATA_IO:
|
| 1549 |
|
|
if (hostdata->aborted) {
|
| 1550 |
|
|
AM53C974_write_8(DMACMD, DMACMD_IDLE);
|
| 1551 |
|
|
AM53C974_write_8(CMDREG, CMDREG_CFIFO);
|
| 1552 |
|
|
AM53C974_write_8(CMDREG, CMDREG_SATN);
|
| 1553 |
|
|
return;
|
| 1554 |
|
|
}
|
| 1555 |
|
|
if ((!cmd->SCp.this_residual) && cmd->SCp.buffers_residual) {
|
| 1556 |
|
|
cmd->SCp.buffer++;
|
| 1557 |
|
|
cmd->SCp.buffers_residual--;
|
| 1558 |
|
|
cmd->SCp.ptr = (unsigned char *) cmd->SCp.buffer->address;
|
| 1559 |
|
|
cmd->SCp.this_residual = cmd->SCp.buffer->length;
|
| 1560 |
|
|
}
|
| 1561 |
|
|
if (cmd->SCp.this_residual) {
|
| 1562 |
|
|
if (!(AM53C974_read_8(DMACMD) & DMACMD_START)) {
|
| 1563 |
|
|
hostdata->dma_busy = 0;
|
| 1564 |
|
|
AM53C974_transfer_dma(instance, statreg & STATREG_IO,
|
| 1565 |
|
|
(unsigned long) cmd->SCp.this_residual,
|
| 1566 |
|
|
cmd->SCp.ptr);
|
| 1567 |
|
|
} else
|
| 1568 |
|
|
hostdata->dma_busy = 1;
|
| 1569 |
|
|
}
|
| 1570 |
|
|
return;
|
| 1571 |
|
|
|
| 1572 |
|
|
case PHASE_MSGIN:
|
| 1573 |
|
|
DEB_INFO(printk("Message-In phase; cmd=0x%lx, sel_cmd=0x%lx\n",
|
| 1574 |
|
|
(long) hostdata->connected, (long) hostdata->sel_cmd));
|
| 1575 |
|
|
AM53C974_set_async(instance, cmd->target);
|
| 1576 |
|
|
if (cmd->SCp.phase == PHASE_DATAIN)
|
| 1577 |
|
|
AM53C974_dma_blast(instance, dmastatus, statreg);
|
| 1578 |
|
|
if ((cmd->SCp.phase == PHASE_DATAOUT) && (AM53C974_read_8(DMACMD) & DMACMD_START)) {
|
| 1579 |
|
|
AM53C974_write_8(DMACMD, DMACMD_IDLE);
|
| 1580 |
|
|
residual = cfifo + (AM53C974_read_8(CTCLREG) | (AM53C974_read_8(CTCMREG) << 8) |
|
| 1581 |
|
|
(AM53C974_read_8(CTCHREG) << 16));
|
| 1582 |
|
|
cmd->SCp.ptr += cmd->SCp.this_residual - residual;
|
| 1583 |
|
|
cmd->SCp.this_residual = residual;
|
| 1584 |
|
|
if (cfifo) {
|
| 1585 |
|
|
AM53C974_write_8(CMDREG, CMDREG_CFIFO);
|
| 1586 |
|
|
cfifo = 0;
|
| 1587 |
|
|
}
|
| 1588 |
|
|
}
|
| 1589 |
|
|
if (cmd->SCp.phase == PHASE_STATIN) {
|
| 1590 |
|
|
while ((AM53C974_read_8(CFIREG) & CFIREG_CF) < 2);
|
| 1591 |
|
|
cmd->SCp.Status = AM53C974_read_8(FFREG);
|
| 1592 |
|
|
cmd->SCp.Message = AM53C974_read_8(FFREG);
|
| 1593 |
|
|
DEB_INFO(printk("Message-In phase; status=0x%02x, message=0x%02x\n",
|
| 1594 |
|
|
cmd->SCp.Status, cmd->SCp.Message));
|
| 1595 |
|
|
ret = AM53C974_message(instance, cmd, cmd->SCp.Message);
|
| 1596 |
|
|
} else {
|
| 1597 |
|
|
if (!cfifo) {
|
| 1598 |
|
|
AM53C974_write_8(CMDREG, CMDREG_IT);
|
| 1599 |
|
|
AM53C974_poll_int();
|
| 1600 |
|
|
cmd->SCp.Message = AM53C974_read_8(FFREG);
|
| 1601 |
|
|
}
|
| 1602 |
|
|
ret = AM53C974_message(instance, cmd, cmd->SCp.Message);
|
| 1603 |
|
|
}
|
| 1604 |
|
|
cmd->SCp.phase = PHASE_MSGIN;
|
| 1605 |
|
|
AM53C974_set_sync(instance, cmd->target);
|
| 1606 |
|
|
break;
|
| 1607 |
|
|
case PHASE_MSGOUT:
|
| 1608 |
|
|
DEB_INFO(printk("Message-Out phase; cfifo=%d; msgout[0]=0x%02x\n",
|
| 1609 |
|
|
AM53C974_read_8(CFIREG) & CFIREG_CF, hostdata->msgout[0]));
|
| 1610 |
|
|
AM53C974_write_8(DMACMD, DMACMD_IDLE);
|
| 1611 |
|
|
AM53C974_set_async(instance, cmd->target);
|
| 1612 |
|
|
for (i = 0; i < sizeof(hostdata->last_message); i++)
|
| 1613 |
|
|
hostdata->last_message[i] = hostdata->msgout[i];
|
| 1614 |
|
|
if ((hostdata->msgout[0] == 0) || INSIDE(hostdata->msgout[0], 0x02, 0x1F) ||
|
| 1615 |
|
|
INSIDE(hostdata->msgout[0], 0x80, 0xFF))
|
| 1616 |
|
|
len = 1;
|
| 1617 |
|
|
else {
|
| 1618 |
|
|
if (hostdata->msgout[0] == EXTENDED_MESSAGE) {
|
| 1619 |
|
|
#ifdef AM53C974_DEBUG_INFO
|
| 1620 |
|
|
printk("Extended message dump:\n");
|
| 1621 |
|
|
for (i = 0; i < hostdata->msgout[1] + 2; i++) {
|
| 1622 |
|
|
printk("%02x ", hostdata->msgout[i]);
|
| 1623 |
|
|
if (i && !(i % 16))
|
| 1624 |
|
|
printk("\n");
|
| 1625 |
|
|
}
|
| 1626 |
|
|
printk("\n");
|
| 1627 |
|
|
#endif
|
| 1628 |
|
|
len = hostdata->msgout[1] + 2;
|
| 1629 |
|
|
} else
|
| 1630 |
|
|
len = 2;
|
| 1631 |
|
|
}
|
| 1632 |
|
|
for (i = 0; i < len; i++)
|
| 1633 |
|
|
AM53C974_write_8(FFREG, hostdata->msgout[i]);
|
| 1634 |
|
|
AM53C974_write_8(CMDREG, CMDREG_IT);
|
| 1635 |
|
|
cmd->SCp.phase = PHASE_MSGOUT;
|
| 1636 |
|
|
hostdata->msgout[0] = NOP;
|
| 1637 |
|
|
AM53C974_set_sync(instance, cmd->target);
|
| 1638 |
|
|
break;
|
| 1639 |
|
|
|
| 1640 |
|
|
case PHASE_CMDOUT:
|
| 1641 |
|
|
DEB_INFO(printk("Command-Out phase\n"));
|
| 1642 |
|
|
AM53C974_set_async(instance, cmd->target);
|
| 1643 |
|
|
for (i = 0; i < cmd->cmd_len; i++)
|
| 1644 |
|
|
AM53C974_write_8(FFREG, cmd->cmnd[i]);
|
| 1645 |
|
|
AM53C974_write_8(CMDREG, CMDREG_IT);
|
| 1646 |
|
|
cmd->SCp.phase = PHASE_CMDOUT;
|
| 1647 |
|
|
AM53C974_set_sync(instance, cmd->target);
|
| 1648 |
|
|
break;
|
| 1649 |
|
|
|
| 1650 |
|
|
case PHASE_STATIN:
|
| 1651 |
|
|
DEB_INFO(printk("Status phase\n"));
|
| 1652 |
|
|
if (cmd->SCp.phase == PHASE_DATAIN)
|
| 1653 |
|
|
AM53C974_dma_blast(instance, dmastatus, statreg);
|
| 1654 |
|
|
AM53C974_set_async(instance, cmd->target);
|
| 1655 |
|
|
if (cmd->SCp.phase == PHASE_DATAOUT) {
|
| 1656 |
|
|
unsigned long residual;
|
| 1657 |
|
|
|
| 1658 |
|
|
if (AM53C974_read_8(DMACMD) & DMACMD_START) {
|
| 1659 |
|
|
AM53C974_write_8(DMACMD, DMACMD_IDLE);
|
| 1660 |
|
|
residual = cfifo + (AM53C974_read_8(CTCLREG) | (AM53C974_read_8(CTCMREG) << 8) |
|
| 1661 |
|
|
(AM53C974_read_8(CTCHREG) << 16));
|
| 1662 |
|
|
cmd->SCp.ptr += cmd->SCp.this_residual - residual;
|
| 1663 |
|
|
cmd->SCp.this_residual = residual;
|
| 1664 |
|
|
}
|
| 1665 |
|
|
if (cfifo) {
|
| 1666 |
|
|
AM53C974_write_8(CMDREG, CMDREG_CFIFO);
|
| 1667 |
|
|
cfifo = 0;
|
| 1668 |
|
|
}
|
| 1669 |
|
|
}
|
| 1670 |
|
|
cmd->SCp.phase = PHASE_STATIN;
|
| 1671 |
|
|
AM53C974_write_8(CMDREG, CMDREG_ICCS); /* command complete */
|
| 1672 |
|
|
break;
|
| 1673 |
|
|
|
| 1674 |
|
|
case PHASE_RES_0:
|
| 1675 |
|
|
case PHASE_RES_1:
|
| 1676 |
|
|
#ifdef AM53C974_DEBUG
|
| 1677 |
|
|
deb_stop = 1;
|
| 1678 |
|
|
#endif
|
| 1679 |
|
|
DEB_INFO(printk("Reserved phase\n"));
|
| 1680 |
|
|
break;
|
| 1681 |
|
|
}
|
| 1682 |
|
|
KEYWAIT();
|
| 1683 |
|
|
}
|
| 1684 |
|
|
|
| 1685 |
|
|
/******************************************************************************
|
| 1686 |
|
|
* Function : int AM53C974_message(struct Scsi_Host *instance, Scsi_Cmnd *cmd,
|
| 1687 |
|
|
* unsigned char msg)
|
| 1688 |
|
|
*
|
| 1689 |
|
|
* Purpose : handle SCSI messages
|
| 1690 |
|
|
*
|
| 1691 |
|
|
* Inputs : instance -- which AM53C974
|
| 1692 |
|
|
* cmd -- SCSI command the message belongs to
|
| 1693 |
|
|
* msg -- message id byte
|
| 1694 |
|
|
*
|
| 1695 |
|
|
* Returns : 1 on success, 0 on failure.
|
| 1696 |
|
|
**************************************************************************/
|
| 1697 |
|
|
static int AM53C974_message(struct Scsi_Host *instance, Scsi_Cmnd * cmd,
|
| 1698 |
|
|
unsigned char msg)
|
| 1699 |
|
|
{
|
| 1700 |
|
|
AM53C974_local_declare();
|
| 1701 |
|
|
static unsigned char extended_msg[10];
|
| 1702 |
|
|
unsigned char statreg;
|
| 1703 |
|
|
int len, ret = 0;
|
| 1704 |
|
|
unsigned char *p;
|
| 1705 |
|
|
#ifdef AM53C974_DEBUG_MSG
|
| 1706 |
|
|
int j;
|
| 1707 |
|
|
#endif
|
| 1708 |
|
|
struct AM53C974_hostdata *hostdata = (struct AM53C974_hostdata *) instance->hostdata;
|
| 1709 |
|
|
AM53C974_setio(instance);
|
| 1710 |
|
|
|
| 1711 |
|
|
DEB_MSG(printk(SEPARATOR_LINE));
|
| 1712 |
|
|
|
| 1713 |
|
|
/* Linking lets us reduce the time required to get the
|
| 1714 |
|
|
* next command out to the device, hopefully this will
|
| 1715 |
|
|
* mean we don't waste another revolution due to the delays
|
| 1716 |
|
|
* required by ARBITRATION and another SELECTION.
|
| 1717 |
|
|
* In the current implementation proposal, low level drivers
|
| 1718 |
|
|
* merely have to start the next command, pointed to by
|
| 1719 |
|
|
* next_link, done() is called as with unlinked commands. */
|
| 1720 |
|
|
switch (msg) {
|
| 1721 |
|
|
#ifdef LINKED
|
| 1722 |
|
|
case LINKED_CMD_COMPLETE:
|
| 1723 |
|
|
case LINKED_FLG_CMD_COMPLETE:
|
| 1724 |
|
|
/* Accept message by releasing ACK */
|
| 1725 |
|
|
DEB_LINKED(printk("scsi%d : target %d lun %d linked command complete.\n",
|
| 1726 |
|
|
instance->host_no, cmd->target, cmd->lun));
|
| 1727 |
|
|
/* Sanity check : A linked command should only terminate with
|
| 1728 |
|
|
* one of these messages if there are more linked commands available. */
|
| 1729 |
|
|
if (!cmd->next_link) {
|
| 1730 |
|
|
printk("scsi%d : target %d lun %d linked command complete, no next_link\n"
|
| 1731 |
|
|
instance->host_no, cmd->target, cmd->lun);
|
| 1732 |
|
|
hostdata->aborted = 1;
|
| 1733 |
|
|
AM53C974_write_8(CMDREG, CMDREG_SATN);
|
| 1734 |
|
|
AM53C974_write_8(CMDREG, CMDREG_MA);
|
| 1735 |
|
|
break;
|
| 1736 |
|
|
}
|
| 1737 |
|
|
if (hostdata->aborted) {
|
| 1738 |
|
|
DEB_ABORT(printk("ATN set for cmnd %d upon reception of LINKED_CMD_COMPLETE or"
|
| 1739 |
|
|
"LINKED_FLG_CMD_COMPLETE message\n", cmd->cmnd[0]));
|
| 1740 |
|
|
AM53C974_write_8(CMDREG, CMDREG_SATN);
|
| 1741 |
|
|
}
|
| 1742 |
|
|
AM53C974_write_8(CMDREG, CMDREG_MA);
|
| 1743 |
|
|
|
| 1744 |
|
|
initialize_SCp(cmd->next_link);
|
| 1745 |
|
|
/* The next command is still part of this process */
|
| 1746 |
|
|
cmd->next_link->tag = cmd->tag;
|
| 1747 |
|
|
cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8);
|
| 1748 |
|
|
DEB_LINKED(printk("scsi%d : target %d lun %d linked request done, calling scsi_done().\n",
|
| 1749 |
|
|
instance->host_no, cmd->target, cmd->lun));
|
| 1750 |
|
|
cmd->scsi_done(cmd);
|
| 1751 |
|
|
cmd = hostdata->connected;
|
| 1752 |
|
|
break;
|
| 1753 |
|
|
|
| 1754 |
|
|
#endif /* def LINKED */
|
| 1755 |
|
|
|
| 1756 |
|
|
case ABORT:
|
| 1757 |
|
|
case COMMAND_COMPLETE:
|
| 1758 |
|
|
DEB_MSG(printk("scsi%d: command complete message received; cmd %d for target %d, lun %d\n",
|
| 1759 |
|
|
instance->host_no, cmd->cmnd[0], cmd->target, cmd->lun));
|
| 1760 |
|
|
hostdata->disconnecting = 1;
|
| 1761 |
|
|
cmd->device->disconnect = 0;
|
| 1762 |
|
|
|
| 1763 |
|
|
/* I'm not sure what the correct thing to do here is :
|
| 1764 |
|
|
|
| 1765 |
|
|
* If the command that just executed is NOT a request
|
| 1766 |
|
|
* sense, the obvious thing to do is to set the result
|
| 1767 |
|
|
* code to the values of the stored parameters.
|
| 1768 |
|
|
* If it was a REQUEST SENSE command, we need some way
|
| 1769 |
|
|
* to differentiate between the failure code of the original
|
| 1770 |
|
|
* and the failure code of the REQUEST sense - the obvious
|
| 1771 |
|
|
* case is success, where we fall through and leave the result
|
| 1772 |
|
|
* code unchanged.
|
| 1773 |
|
|
*
|
| 1774 |
|
|
* The non-obvious place is where the REQUEST SENSE failed */
|
| 1775 |
|
|
if (cmd->cmnd[0] != REQUEST_SENSE)
|
| 1776 |
|
|
cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8);
|
| 1777 |
|
|
else if (cmd->SCp.Status != GOOD)
|
| 1778 |
|
|
cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16);
|
| 1779 |
|
|
if (hostdata->aborted) {
|
| 1780 |
|
|
AM53C974_write_8(CMDREG, CMDREG_SATN);
|
| 1781 |
|
|
AM53C974_write_8(CMDREG, CMDREG_MA);
|
| 1782 |
|
|
DEB_ABORT(printk("ATN set for cmnd %d upon reception of ABORT or"
|
| 1783 |
|
|
"COMMAND_COMPLETE message\n", cmd->cmnd[0]));
|
| 1784 |
|
|
break;
|
| 1785 |
|
|
}
|
| 1786 |
|
|
if ((cmd->cmnd[0] != REQUEST_SENSE) && (cmd->SCp.Status == CHECK_CONDITION)) {
|
| 1787 |
|
|
DEB_MSG(printk("scsi%d : performing request sense\n", instance->host_no));
|
| 1788 |
|
|
cmd->cmnd[0] = REQUEST_SENSE;
|
| 1789 |
|
|
cmd->cmnd[1] &= 0xe0;
|
| 1790 |
|
|
cmd->cmnd[2] = 0;
|
| 1791 |
|
|
cmd->cmnd[3] = 0;
|
| 1792 |
|
|
cmd->cmnd[4] = sizeof(cmd->sense_buffer);
|
| 1793 |
|
|
cmd->cmnd[5] = 0;
|
| 1794 |
|
|
cmd->SCp.buffer = NULL;
|
| 1795 |
|
|
cmd->SCp.buffers_residual = 0;
|
| 1796 |
|
|
cmd->SCp.ptr = (char *) cmd->sense_buffer;
|
| 1797 |
|
|
cmd->SCp.this_residual = sizeof(cmd->sense_buffer);
|
| 1798 |
|
|
LIST(cmd, hostdata->issue_queue);
|
| 1799 |
|
|
cmd->host_scribble = (unsigned char *) hostdata->issue_queue;
|
| 1800 |
|
|
hostdata->issue_queue = (Scsi_Cmnd *) cmd;
|
| 1801 |
|
|
DEB_MSG(printk("scsi%d : REQUEST SENSE added to head of issue queue\n", instance->host_no));
|
| 1802 |
|
|
}
|
| 1803 |
|
|
/* Accept message by clearing ACK */
|
| 1804 |
|
|
AM53C974_write_8(CMDREG, CMDREG_MA);
|
| 1805 |
|
|
break;
|
| 1806 |
|
|
|
| 1807 |
|
|
case MESSAGE_REJECT:
|
| 1808 |
|
|
DEB_MSG(printk("scsi%d: reject message received; cmd %d for target %d, lun %d\n",
|
| 1809 |
|
|
instance->host_no, cmd->cmnd[0], cmd->target, cmd->lun));
|
| 1810 |
|
|
switch (hostdata->last_message[0]) {
|
| 1811 |
|
|
case EXTENDED_MESSAGE:
|
| 1812 |
|
|
if (hostdata->last_message[2] == EXTENDED_SDTR) {
|
| 1813 |
|
|
/* sync. negotiation was rejected, setup asynchronous transfer with target */
|
| 1814 |
|
|
printk("\ntarget %d: rate=%d Mhz, asynchronous (sync. negotiation rejected)\n",
|
| 1815 |
|
|
cmd->target, DEF_CLK / DEF_STP);
|
| 1816 |
|
|
hostdata->sync_off[cmd->target] = 0;
|
| 1817 |
|
|
hostdata->sync_per[cmd->target] = DEF_STP;
|
| 1818 |
|
|
}
|
| 1819 |
|
|
break;
|
| 1820 |
|
|
case HEAD_OF_QUEUE_TAG:
|
| 1821 |
|
|
case ORDERED_QUEUE_TAG:
|
| 1822 |
|
|
case SIMPLE_QUEUE_TAG:
|
| 1823 |
|
|
cmd->device->tagged_queue = 0;
|
| 1824 |
|
|
hostdata->busy[cmd->target] |= (1 << cmd->lun);
|
| 1825 |
|
|
break;
|
| 1826 |
|
|
default:
|
| 1827 |
|
|
break;
|
| 1828 |
|
|
}
|
| 1829 |
|
|
if (hostdata->aborted)
|
| 1830 |
|
|
AM53C974_write_8(CMDREG, CMDREG_SATN);
|
| 1831 |
|
|
AM53C974_write_8(CMDREG, CMDREG_MA);
|
| 1832 |
|
|
break;
|
| 1833 |
|
|
|
| 1834 |
|
|
case DISCONNECT:
|
| 1835 |
|
|
DEB_MSG(printk("scsi%d: disconnect message received; cmd %d for target %d, lun %d\n",
|
| 1836 |
|
|
instance->host_no, cmd->cmnd[0], cmd->target, cmd->lun));
|
| 1837 |
|
|
cmd->device->disconnect = 1;
|
| 1838 |
|
|
hostdata->disconnecting = 1;
|
| 1839 |
|
|
AM53C974_write_8(CMDREG, CMDREG_MA); /* Accept message by clearing ACK */
|
| 1840 |
|
|
break;
|
| 1841 |
|
|
|
| 1842 |
|
|
case SAVE_POINTERS:
|
| 1843 |
|
|
case RESTORE_POINTERS:
|
| 1844 |
|
|
DEB_MSG(printk("scsi%d: save/restore pointers message received; cmd %d for target %d, lun %d\n",
|
| 1845 |
|
|
instance->host_no, cmd->cmnd[0], cmd->target, cmd->lun));
|
| 1846 |
|
|
/* The SCSI data pointer is *IMPLICITLY* saved on a disconnect
|
| 1847 |
|
|
* operation, in violation of the SCSI spec so we can safely
|
| 1848 |
|
|
* ignore SAVE/RESTORE pointers calls.
|
| 1849 |
|
|
*
|
| 1850 |
|
|
* Unfortunately, some disks violate the SCSI spec and
|
| 1851 |
|
|
* don't issue the required SAVE_POINTERS message before
|
| 1852 |
|
|
* disconnecting, and we have to break spec to remain
|
| 1853 |
|
|
* compatible. */
|
| 1854 |
|
|
if (hostdata->aborted) {
|
| 1855 |
|
|
DEB_ABORT(printk("ATN set for cmnd %d upon reception of SAVE/REST. POINTERS message\n",
|
| 1856 |
|
|
cmd->cmnd[0]));
|
| 1857 |
|
|
AM53C974_write_8(CMDREG, CMDREG_SATN);
|
| 1858 |
|
|
}
|
| 1859 |
|
|
AM53C974_write_8(CMDREG, CMDREG_MA);
|
| 1860 |
|
|
break;
|
| 1861 |
|
|
|
| 1862 |
|
|
case EXTENDED_MESSAGE:
|
| 1863 |
|
|
DEB_MSG(printk("scsi%d: extended message received; cmd %d for target %d, lun %d\n",
|
| 1864 |
|
|
instance->host_no, cmd->cmnd[0], cmd->target, cmd->lun));
|
| 1865 |
|
|
/* Extended messages are sent in the following format :
|
| 1866 |
|
|
* Byte
|
| 1867 |
|
|
* 0 EXTENDED_MESSAGE == 1
|
| 1868 |
|
|
* 1 length (includes one byte for code, doesn't include first two bytes)
|
| 1869 |
|
|
* 2 code
|
| 1870 |
|
|
* 3..length+1 arguments
|
| 1871 |
|
|
*/
|
| 1872 |
|
|
/* BEWARE!! THIS CODE IS EXTREMELY UGLY */
|
| 1873 |
|
|
extended_msg[0] = EXTENDED_MESSAGE;
|
| 1874 |
|
|
AM53C974_read_8(INSTREG); /* clear int */
|
| 1875 |
|
|
AM53C974_write_8(CMDREG, CMDREG_MA); /* ack. msg byte, then wait for SO */
|
| 1876 |
|
|
AM53C974_poll_int();
|
| 1877 |
|
|
/* get length */
|
| 1878 |
|
|
AM53C974_write_8(CMDREG, CMDREG_IT);
|
| 1879 |
|
|
AM53C974_poll_int();
|
| 1880 |
|
|
AM53C974_write_8(CMDREG, CMDREG_MA); /* ack. msg byte, then wait for SO */
|
| 1881 |
|
|
AM53C974_poll_int();
|
| 1882 |
|
|
extended_msg[1] = len = AM53C974_read_8(FFREG); /* get length */
|
| 1883 |
|
|
p = extended_msg + 2;
|
| 1884 |
|
|
/* read the remaining (len) bytes */
|
| 1885 |
|
|
while (len) {
|
| 1886 |
|
|
AM53C974_write_8(CMDREG, CMDREG_IT);
|
| 1887 |
|
|
AM53C974_poll_int();
|
| 1888 |
|
|
if (len > 1) {
|
| 1889 |
|
|
AM53C974_write_8(CMDREG, CMDREG_MA); /* ack. msg byte, then wait for SO */
|
| 1890 |
|
|
AM53C974_poll_int();
|
| 1891 |
|
|
}
|
| 1892 |
|
|
*p = AM53C974_read_8(FFREG);
|
| 1893 |
|
|
p++;
|
| 1894 |
|
|
len--;
|
| 1895 |
|
|
}
|
| 1896 |
|
|
|
| 1897 |
|
|
#ifdef AM53C974_DEBUG_MSG
|
| 1898 |
|
|
printk("scsi%d: received extended message: ", instance->host_no);
|
| 1899 |
|
|
for (j = 0; j < extended_msg[1] + 2; j++) {
|
| 1900 |
|
|
printk("0x%02x ", extended_msg[j]);
|
| 1901 |
|
|
if (j && !(j % 16))
|
| 1902 |
|
|
printk("\n");
|
| 1903 |
|
|
}
|
| 1904 |
|
|
printk("\n");
|
| 1905 |
|
|
#endif
|
| 1906 |
|
|
|
| 1907 |
|
|
/* check message */
|
| 1908 |
|
|
if (extended_msg[2] == EXTENDED_SDTR)
|
| 1909 |
|
|
ret = AM53C974_sync_neg(instance, cmd->target, extended_msg);
|
| 1910 |
|
|
if (ret || hostdata->aborted)
|
| 1911 |
|
|
AM53C974_write_8(CMDREG, CMDREG_SATN);
|
| 1912 |
|
|
|
| 1913 |
|
|
AM53C974_write_8(CMDREG, CMDREG_MA);
|
| 1914 |
|
|
break;
|
| 1915 |
|
|
|
| 1916 |
|
|
default:
|
| 1917 |
|
|
printk("scsi%d: unknown message 0x%02x received\n", instance->host_no, msg);
|
| 1918 |
|
|
#ifdef AM53C974_DEBUG
|
| 1919 |
|
|
deb_stop = 1;
|
| 1920 |
|
|
#endif
|
| 1921 |
|
|
/* reject message */
|
| 1922 |
|
|
hostdata->msgout[0] = MESSAGE_REJECT;
|
| 1923 |
|
|
AM53C974_write_8(CMDREG, CMDREG_SATN);
|
| 1924 |
|
|
AM53C974_write_8(CMDREG, CMDREG_MA);
|
| 1925 |
|
|
return (0);
|
| 1926 |
|
|
break;
|
| 1927 |
|
|
|
| 1928 |
|
|
} /* switch (msg) */
|
| 1929 |
|
|
KEYWAIT();
|
| 1930 |
|
|
return (1);
|
| 1931 |
|
|
}
|
| 1932 |
|
|
|
| 1933 |
|
|
/**************************************************************************
|
| 1934 |
|
|
* Function : AM53C974_select(struct Scsi_Host *instance, Scsi_Cmnd *cmd, int tag)
|
| 1935 |
|
|
*
|
| 1936 |
|
|
* Purpose : try to establish nexus for the command;
|
| 1937 |
|
|
* start sync negotiation via start stop and transfer the command in
|
| 1938 |
|
|
* cmdout phase in case of an inquiry or req. sense command with no
|
| 1939 |
|
|
* sync. neg. performed yet
|
| 1940 |
|
|
*
|
| 1941 |
|
|
* Inputs : instance -- which AM53C974
|
| 1942 |
|
|
* cmd -- command which requires the selection
|
| 1943 |
|
|
* tag -- tagged queueing
|
| 1944 |
|
|
*
|
| 1945 |
|
|
* Returns : nothing
|
| 1946 |
|
|
*
|
| 1947 |
|
|
* Note: this function initializes the selection process, which is continued
|
| 1948 |
|
|
* in the interrupt handler
|
| 1949 |
|
|
**************************************************************************/
|
| 1950 |
|
|
static void AM53C974_select(struct Scsi_Host *instance, Scsi_Cmnd * cmd, int tag)
|
| 1951 |
|
|
{
|
| 1952 |
|
|
AM53C974_local_declare();
|
| 1953 |
|
|
struct AM53C974_hostdata *hostdata = (struct AM53C974_hostdata *) instance->hostdata;
|
| 1954 |
|
|
unsigned char cfifo, tmp[3];
|
| 1955 |
|
|
unsigned int i, len, cmd_size = COMMAND_SIZE(cmd->cmnd[0]);
|
| 1956 |
|
|
AM53C974_setio(instance);
|
| 1957 |
|
|
|
| 1958 |
|
|
cfifo = AM53C974_cfifo();
|
| 1959 |
|
|
if (cfifo) {
|
| 1960 |
|
|
printk("scsi%d: select error; %d residual bytes in FIFO\n", instance->host_no, cfifo);
|
| 1961 |
|
|
AM53C974_write_8(CMDREG, CMDREG_CFIFO); /* clear FIFO */
|
| 1962 |
|
|
}
|
| 1963 |
|
|
#ifdef AM53C974_PROHIBIT_DISCONNECT
|
| 1964 |
|
|
tmp[0] = IDENTIFY(0, cmd->lun);
|
| 1965 |
|
|
#else
|
| 1966 |
|
|
tmp[0] = IDENTIFY(1, cmd->lun);
|
| 1967 |
|
|
#endif
|
| 1968 |
|
|
|
| 1969 |
|
|
#ifdef SCSI2
|
| 1970 |
|
|
if (cmd->device->tagged_queue && (tag != TAG_NONE)) {
|
| 1971 |
|
|
tmp[1] = SIMPLE_QUEUE_TAG;
|
| 1972 |
|
|
if (tag == TAG_NEXT) {
|
| 1973 |
|
|
/* 0 is TAG_NONE, used to imply no tag for this command */
|
| 1974 |
|
|
if (cmd->device->current_tag == 0)
|
| 1975 |
|
|
cmd->device->current_tag = 1;
|
| 1976 |
|
|
cmd->tag = cmd->device->current_tag;
|
| 1977 |
|
|
cmd->device->current_tag++;
|
| 1978 |
|
|
} else
|
| 1979 |
|
|
cmd->tag = (unsigned char) tag;
|
| 1980 |
|
|
tmp[2] = cmd->tag;
|
| 1981 |
|
|
hostdata->last_message[0] = SIMPLE_QUEUE_TAG;
|
| 1982 |
|
|
len = 3;
|
| 1983 |
|
|
AM53C974_write_8(FFREG, tmp[0]);
|
| 1984 |
|
|
AM53C974_write_8(FFREG, tmp[1]);
|
| 1985 |
|
|
AM53C974_write_8(FFREG, tmp[2]);
|
| 1986 |
|
|
} else
|
| 1987 |
|
|
#endif /* def SCSI2 */
|
| 1988 |
|
|
{
|
| 1989 |
|
|
len = 1;
|
| 1990 |
|
|
AM53C974_write_8(FFREG, tmp[0]);
|
| 1991 |
|
|
cmd->tag = 0;
|
| 1992 |
|
|
}
|
| 1993 |
|
|
|
| 1994 |
|
|
/* in case of an inquiry or req. sense command with no sync. neg performed yet, we start
|
| 1995 |
|
|
sync negotiation via start stops and transfer the command in cmdout phase */
|
| 1996 |
|
|
if (((cmd->cmnd[0] == INQUIRY) || (cmd->cmnd[0] == REQUEST_SENSE)) &&
|
| 1997 |
|
|
!(hostdata->sync_neg[cmd->target]) && hostdata->sync_en[cmd->target]) {
|
| 1998 |
|
|
hostdata->sync_neg[cmd->target] = 1;
|
| 1999 |
|
|
hostdata->msgout[0] = EXTENDED_MESSAGE;
|
| 2000 |
|
|
hostdata->msgout[1] = 3;
|
| 2001 |
|
|
hostdata->msgout[2] = EXTENDED_SDTR;
|
| 2002 |
|
|
hostdata->msgout[3] = 250 / (int) hostdata->max_rate[cmd->target];
|
| 2003 |
|
|
hostdata->msgout[4] = hostdata->max_offset[cmd->target];
|
| 2004 |
|
|
len += 5;
|
| 2005 |
|
|
}
|
| 2006 |
|
|
AM53C974_write_8(SDIDREG, SDIREG_MASK & cmd->target); /* setup dest. id */
|
| 2007 |
|
|
AM53C974_write_8(STIMREG, DEF_SCSI_TIMEOUT); /* setup timeout reg */
|
| 2008 |
|
|
switch (len) {
|
| 2009 |
|
|
case 1:
|
| 2010 |
|
|
for (i = 0; i < cmd_size; i++)
|
| 2011 |
|
|
AM53C974_write_8(FFREG, cmd->cmnd[i]);
|
| 2012 |
|
|
AM53C974_write_8(CMDREG, CMDREG_SAS); /* select with ATN, 1 msg byte */
|
| 2013 |
|
|
hostdata->msgout[0] = NOP;
|
| 2014 |
|
|
break;
|
| 2015 |
|
|
case 3:
|
| 2016 |
|
|
for (i = 0; i < cmd_size; i++)
|
| 2017 |
|
|
AM53C974_write_8(FFREG, cmd->cmnd[i]);
|
| 2018 |
|
|
AM53C974_write_8(CMDREG, CMDREG_SA3S); /* select with ATN, 3 msg bytes */
|
| 2019 |
|
|
hostdata->msgout[0] = NOP;
|
| 2020 |
|
|
break;
|
| 2021 |
|
|
default:
|
| 2022 |
|
|
AM53C974_write_8(CMDREG, CMDREG_SASS); /* select with ATN, stop steps; continue in message out phase */
|
| 2023 |
|
|
break;
|
| 2024 |
|
|
}
|
| 2025 |
|
|
}
|
| 2026 |
|
|
|
| 2027 |
|
|
/**************************************************************************
|
| 2028 |
|
|
* Function : AM53C974_intr_select(struct Scsi_Host *instance, unsigned char statreg)
|
| 2029 |
|
|
*
|
| 2030 |
|
|
* Purpose : handle reselection
|
| 2031 |
|
|
*
|
| 2032 |
|
|
* Inputs : instance -- which AM53C974
|
| 2033 |
|
|
* statreg -- status register
|
| 2034 |
|
|
*
|
| 2035 |
|
|
* Returns : nothing
|
| 2036 |
|
|
*
|
| 2037 |
|
|
* side effects: manipulates hostdata
|
| 2038 |
|
|
**************************************************************************/
|
| 2039 |
|
|
static void AM53C974_intr_reselect(struct Scsi_Host *instance, unsigned char statreg)
|
| 2040 |
|
|
{
|
| 2041 |
|
|
AM53C974_local_declare();
|
| 2042 |
|
|
struct AM53C974_hostdata *hostdata = (struct AM53C974_hostdata *) instance->hostdata;
|
| 2043 |
|
|
unsigned char cfifo, msg[3], lun, t, target = 0;
|
| 2044 |
|
|
#ifdef SCSI2
|
| 2045 |
|
|
unsigned char tag;
|
| 2046 |
|
|
#endif
|
| 2047 |
|
|
Scsi_Cmnd *tmp = NULL, *prev;
|
| 2048 |
|
|
AM53C974_setio(instance);
|
| 2049 |
|
|
|
| 2050 |
|
|
cfifo = AM53C974_cfifo();
|
| 2051 |
|
|
|
| 2052 |
|
|
if (hostdata->selecting) {
|
| 2053 |
|
|
/* caught reselect interrupt in selection process;
|
| 2054 |
|
|
put selecting command back into the issue queue and continue with the
|
| 2055 |
|
|
reselecting command */
|
| 2056 |
|
|
DEB_RESEL(printk("AM53C974_intr_reselect: in selection process\n"));
|
| 2057 |
|
|
LIST(hostdata->sel_cmd, hostdata->issue_queue);
|
| 2058 |
|
|
hostdata->sel_cmd->host_scribble = (unsigned char *) hostdata->issue_queue;
|
| 2059 |
|
|
hostdata->issue_queue = hostdata->sel_cmd;
|
| 2060 |
|
|
hostdata->sel_cmd = NULL;
|
| 2061 |
|
|
hostdata->selecting = 0;
|
| 2062 |
|
|
}
|
| 2063 |
|
|
/* 2 bytes must be in the FIFO now */
|
| 2064 |
|
|
if (cfifo != 2) {
|
| 2065 |
|
|
printk("scsi %d: error: %d bytes in fifo, 2 expected\n", instance->host_no, cfifo);
|
| 2066 |
|
|
hostdata->aborted = 1;
|
| 2067 |
|
|
goto EXIT_ABORT;
|
| 2068 |
|
|
}
|
| 2069 |
|
|
/* determine target which reselected */
|
| 2070 |
|
|
t = AM53C974_read_8(FFREG);
|
| 2071 |
|
|
if (!(t & (1 << instance->this_id))) {
|
| 2072 |
|
|
printk("scsi %d: error: invalid host id\n", instance->host_no);
|
| 2073 |
|
|
hostdata->aborted = 1;
|
| 2074 |
|
|
goto EXIT_ABORT;
|
| 2075 |
|
|
}
|
| 2076 |
|
|
t ^= (1 << instance->this_id);
|
| 2077 |
|
|
target = 0;
|
| 2078 |
|
|
while (t != 1) {
|
| 2079 |
|
|
t >>= 1;
|
| 2080 |
|
|
target++;
|
| 2081 |
|
|
}
|
| 2082 |
|
|
DEB_RESEL(printk("scsi %d: reselect; target: %d\n", instance->host_no, target));
|
| 2083 |
|
|
|
| 2084 |
|
|
if (hostdata->aborted)
|
| 2085 |
|
|
goto EXIT_ABORT;
|
| 2086 |
|
|
|
| 2087 |
|
|
if ((statreg & STATREG_PHASE) != PHASE_MSGIN) {
|
| 2088 |
|
|
printk("scsi %d: error: upon reselection interrupt not in MSGIN\n", instance->host_no);
|
| 2089 |
|
|
hostdata->aborted = 1;
|
| 2090 |
|
|
goto EXIT_ABORT;
|
| 2091 |
|
|
}
|
| 2092 |
|
|
msg[0] = AM53C974_read_8(FFREG);
|
| 2093 |
|
|
if (!msg[0] & 0x80) {
|
| 2094 |
|
|
printk("scsi%d: error: expecting IDENTIFY message, got ", instance->host_no);
|
| 2095 |
|
|
print_msg(msg);
|
| 2096 |
|
|
hostdata->aborted = 1;
|
| 2097 |
|
|
goto EXIT_ABORT;
|
| 2098 |
|
|
}
|
| 2099 |
|
|
lun = (msg[0] & 0x07);
|
| 2100 |
|
|
|
| 2101 |
|
|
/* We need to add code for SCSI-II to track which devices have
|
| 2102 |
|
|
* I_T_L_Q nexuses established, and which have simple I_T_L
|
| 2103 |
|
|
* nexuses so we can chose to do additional data transfer. */
|
| 2104 |
|
|
#ifdef SCSI2
|
| 2105 |
|
|
#error "SCSI-II tagged queueing is not supported yet"
|
| 2106 |
|
|
#endif
|
| 2107 |
|
|
|
| 2108 |
|
|
/* Find the command corresponding to the I_T_L or I_T_L_Q nexus we
|
| 2109 |
|
|
* just reestablished, and remove it from the disconnected queue. */
|
| 2110 |
|
|
for (tmp = (Scsi_Cmnd *) hostdata->disconnected_queue, prev = NULL;
|
| 2111 |
|
|
tmp; prev = tmp, tmp = (Scsi_Cmnd *) tmp->host_scribble)
|
| 2112 |
|
|
if ((target == tmp->target) && (lun == tmp->lun)
|
| 2113 |
|
|
#ifdef SCSI2
|
| 2114 |
|
|
&& (tag == tmp->tag)
|
| 2115 |
|
|
#endif
|
| 2116 |
|
|
) {
|
| 2117 |
|
|
if (prev) {
|
| 2118 |
|
|
REMOVE(prev, (Scsi_Cmnd *) (prev->host_scribble), tmp,
|
| 2119 |
|
|
(Scsi_Cmnd *) (tmp->host_scribble));
|
| 2120 |
|
|
prev->host_scribble = tmp->host_scribble;
|
| 2121 |
|
|
} else {
|
| 2122 |
|
|
REMOVE(-1, hostdata->disconnected_queue, tmp, tmp->host_scribble);
|
| 2123 |
|
|
hostdata->disconnected_queue = (Scsi_Cmnd *) tmp->host_scribble;
|
| 2124 |
|
|
}
|
| 2125 |
|
|
tmp->host_scribble = NULL;
|
| 2126 |
|
|
hostdata->connected = tmp;
|
| 2127 |
|
|
break;
|
| 2128 |
|
|
}
|
| 2129 |
|
|
if (!tmp) {
|
| 2130 |
|
|
#ifdef SCSI2
|
| 2131 |
|
|
printk("scsi%d: warning : target %d lun %d tag %d not in disconnect_queue.\n",
|
| 2132 |
|
|
instance->host_no, target, lun, tag);
|
| 2133 |
|
|
#else
|
| 2134 |
|
|
printk("scsi%d: warning : target %d lun %d not in disconnect_queue.\n",
|
| 2135 |
|
|
instance->host_no, target, lun);
|
| 2136 |
|
|
#endif
|
| 2137 |
|
|
/* Since we have an established nexus that we can't do anything with, we must abort it. */
|
| 2138 |
|
|
hostdata->aborted = 1;
|
| 2139 |
|
|
DEB(AM53C974_keywait());
|
| 2140 |
|
|
goto EXIT_ABORT;
|
| 2141 |
|
|
} else
|
| 2142 |
|
|
goto EXIT_OK;
|
| 2143 |
|
|
|
| 2144 |
|
|
EXIT_ABORT:
|
| 2145 |
|
|
AM53C974_write_8(CMDREG, CMDREG_SATN);
|
| 2146 |
|
|
AM53C974_write_8(CMDREG, CMDREG_MA);
|
| 2147 |
|
|
return;
|
| 2148 |
|
|
|
| 2149 |
|
|
EXIT_OK:
|
| 2150 |
|
|
DEB_RESEL(printk("scsi%d: nexus established, target = %d, lun = %d, tag = %d\n",
|
| 2151 |
|
|
instance->host_no, target, tmp->lun, tmp->tag));
|
| 2152 |
|
|
AM53C974_set_sync(instance, target);
|
| 2153 |
|
|
AM53C974_write_8(SDIDREG, SDIREG_MASK & target); /* setup dest. id */
|
| 2154 |
|
|
AM53C974_write_8(CMDREG, CMDREG_MA);
|
| 2155 |
|
|
hostdata->dma_busy = 0;
|
| 2156 |
|
|
hostdata->connected->SCp.phase = PHASE_CMDOUT;
|
| 2157 |
|
|
}
|
| 2158 |
|
|
|
| 2159 |
|
|
/**************************************************************************
|
| 2160 |
|
|
* Function : AM53C974_transfer_dma(struct Scsi_Host *instance, short dir,
|
| 2161 |
|
|
* unsigned long length, char *data)
|
| 2162 |
|
|
*
|
| 2163 |
|
|
* Purpose : setup DMA transfer
|
| 2164 |
|
|
*
|
| 2165 |
|
|
* Inputs : instance -- which AM53C974
|
| 2166 |
|
|
* dir -- direction flag, 0: write to device, read from memory;
|
| 2167 |
|
|
* 1: read from device, write to memory
|
| 2168 |
|
|
* length -- number of bytes to transfer to from buffer
|
| 2169 |
|
|
* data -- pointer to data buffer
|
| 2170 |
|
|
*
|
| 2171 |
|
|
* Returns : nothing
|
| 2172 |
|
|
**************************************************************************/
|
| 2173 |
|
|
static __inline__ void AM53C974_transfer_dma(struct Scsi_Host *instance, short dir,
|
| 2174 |
|
|
unsigned long length, char *data)
|
| 2175 |
|
|
{
|
| 2176 |
|
|
AM53C974_local_declare();
|
| 2177 |
|
|
AM53C974_setio(instance);
|
| 2178 |
|
|
|
| 2179 |
|
|
AM53C974_write_8(CMDREG, CMDREG_NOP);
|
| 2180 |
|
|
AM53C974_write_8(DMACMD, (dir << 7) | DMACMD_INTE_D); /* idle command */
|
| 2181 |
|
|
AM53C974_write_8(STCLREG, (unsigned char) (length & 0xff));
|
| 2182 |
|
|
AM53C974_write_8(STCMREG, (unsigned char) ((length & 0xff00) >> 8));
|
| 2183 |
|
|
AM53C974_write_8(STCHREG, (unsigned char) ((length & 0xff0000) >> 16));
|
| 2184 |
|
|
AM53C974_write_32(DMASTC, length & 0xffffff);
|
| 2185 |
|
|
AM53C974_write_32(DMASPA, virt_to_bus(data));
|
| 2186 |
|
|
AM53C974_write_8(CMDREG, CMDREG_IT | CMDREG_DMA);
|
| 2187 |
|
|
AM53C974_write_8(DMACMD, (dir << 7) | DMACMD_INTE_D | DMACMD_START);
|
| 2188 |
|
|
}
|
| 2189 |
|
|
|
| 2190 |
|
|
/**************************************************************************
|
| 2191 |
|
|
* Function : AM53C974_dma_blast(struct Scsi_Host *instance, unsigned char dmastatus,
|
| 2192 |
|
|
* unsigned char statreg)
|
| 2193 |
|
|
*
|
| 2194 |
|
|
* Purpose : cleanup DMA transfer
|
| 2195 |
|
|
*
|
| 2196 |
|
|
* Inputs : instance -- which AM53C974
|
| 2197 |
|
|
* dmastatus -- dma status register
|
| 2198 |
|
|
* statreg -- status register
|
| 2199 |
|
|
*
|
| 2200 |
|
|
* Returns : nothing
|
| 2201 |
|
|
**************************************************************************/
|
| 2202 |
|
|
static void AM53C974_dma_blast(struct Scsi_Host *instance, unsigned char dmastatus,
|
| 2203 |
|
|
unsigned char statreg)
|
| 2204 |
|
|
{
|
| 2205 |
|
|
AM53C974_local_declare();
|
| 2206 |
|
|
struct AM53C974_hostdata *hostdata = (struct AM53C974_hostdata *) instance->hostdata;
|
| 2207 |
|
|
unsigned long ctcreg;
|
| 2208 |
|
|
int dir = statreg & STATREG_IO;
|
| 2209 |
|
|
int cfifo, pio, i = 0;
|
| 2210 |
|
|
AM53C974_setio(instance);
|
| 2211 |
|
|
|
| 2212 |
|
|
do {
|
| 2213 |
|
|
cfifo = AM53C974_cfifo();
|
| 2214 |
|
|
i++;
|
| 2215 |
|
|
} while (cfifo && (i < 50000));
|
| 2216 |
|
|
pio = (i == 50000) ? 1 : 0;
|
| 2217 |
|
|
|
| 2218 |
|
|
if (statreg & STATREG_CTZ) {
|
| 2219 |
|
|
AM53C974_write_8(DMACMD, DMACMD_IDLE);
|
| 2220 |
|
|
return;
|
| 2221 |
|
|
}
|
| 2222 |
|
|
if (dmastatus & DMASTATUS_DONE) {
|
| 2223 |
|
|
AM53C974_write_8(DMACMD, DMACMD_IDLE);
|
| 2224 |
|
|
return;
|
| 2225 |
|
|
}
|
| 2226 |
|
|
AM53C974_write_8(DMACMD, ((dir << 7) & DMACMD_DIR) | DMACMD_BLAST);
|
| 2227 |
|
|
while (!(AM53C974_read_8(DMASTATUS) & DMASTATUS_BCMPLT));
|
| 2228 |
|
|
AM53C974_write_8(DMACMD, DMACMD_IDLE);
|
| 2229 |
|
|
|
| 2230 |
|
|
if (pio) {
|
| 2231 |
|
|
/* transfer residual bytes via PIO */
|
| 2232 |
|
|
unsigned char *wac = (unsigned char *) AM53C974_read_32(DMAWAC);
|
| 2233 |
|
|
printk("pio mode, residual=%d\n", AM53C974_read_8(CFIREG) & CFIREG_CF);
|
| 2234 |
|
|
while (AM53C974_read_8(CFIREG) & CFIREG_CF)
|
| 2235 |
|
|
*(wac++) = AM53C974_read_8(FFREG);
|
| 2236 |
|
|
}
|
| 2237 |
|
|
ctcreg = AM53C974_read_8(CTCLREG) | (AM53C974_read_8(CTCMREG) << 8) |
|
| 2238 |
|
|
(AM53C974_read_8(CTCHREG) << 16);
|
| 2239 |
|
|
|
| 2240 |
|
|
hostdata->connected->SCp.ptr += hostdata->connected->SCp.this_residual - ctcreg;
|
| 2241 |
|
|
hostdata->connected->SCp.this_residual = ctcreg;
|
| 2242 |
|
|
}
|
| 2243 |
|
|
|
| 2244 |
|
|
/**************************************************************************
|
| 2245 |
|
|
* Function : AM53C974_intr_bus_reset(struct Scsi_Host *instance)
|
| 2246 |
|
|
*
|
| 2247 |
|
|
* Purpose : handle bus reset interrupt
|
| 2248 |
|
|
*
|
| 2249 |
|
|
* Inputs : instance -- which AM53C974
|
| 2250 |
|
|
*
|
| 2251 |
|
|
* Returns : nothing
|
| 2252 |
|
|
**************************************************************************/
|
| 2253 |
|
|
static void AM53C974_intr_bus_reset(struct Scsi_Host *instance)
|
| 2254 |
|
|
{
|
| 2255 |
|
|
AM53C974_local_declare();
|
| 2256 |
|
|
unsigned char cntlreg1;
|
| 2257 |
|
|
AM53C974_setio(instance);
|
| 2258 |
|
|
|
| 2259 |
|
|
AM53C974_write_8(CMDREG, CMDREG_CFIFO);
|
| 2260 |
|
|
AM53C974_write_8(CMDREG, CMDREG_NOP);
|
| 2261 |
|
|
|
| 2262 |
|
|
cntlreg1 = AM53C974_read_8(CNTLREG1);
|
| 2263 |
|
|
AM53C974_write_8(CNTLREG1, cntlreg1 | CNTLREG1_DISR);
|
| 2264 |
|
|
}
|
| 2265 |
|
|
|
| 2266 |
|
|
/**************************************************************************
|
| 2267 |
|
|
* Function : int AM53C974_abort(Scsi_Cmnd *cmd)
|
| 2268 |
|
|
*
|
| 2269 |
|
|
* Purpose : abort a command
|
| 2270 |
|
|
*
|
| 2271 |
|
|
* Inputs : cmd - the Scsi_Cmnd to abort, code - code to set the
|
| 2272 |
|
|
* host byte of the result field to, if zero DID_ABORTED is
|
| 2273 |
|
|
* used.
|
| 2274 |
|
|
*
|
| 2275 |
|
|
* Returns : 0 - success, -1 on failure.
|
| 2276 |
|
|
**************************************************************************/
|
| 2277 |
|
|
static int AM53C974_abort(Scsi_Cmnd * cmd)
|
| 2278 |
|
|
{
|
| 2279 |
|
|
AM53C974_local_declare();
|
| 2280 |
|
|
unsigned long flags;
|
| 2281 |
|
|
struct Scsi_Host *instance = cmd->host;
|
| 2282 |
|
|
struct AM53C974_hostdata *hostdata = (struct AM53C974_hostdata *) instance->hostdata;
|
| 2283 |
|
|
Scsi_Cmnd *tmp, **prev;
|
| 2284 |
|
|
|
| 2285 |
|
|
#ifdef AM53C974_DEBUG
|
| 2286 |
|
|
deb_stop = 1;
|
| 2287 |
|
|
#endif
|
| 2288 |
|
|
save_flags(flags);
|
| 2289 |
|
|
cli();
|
| 2290 |
|
|
AM53C974_setio(instance);
|
| 2291 |
|
|
|
| 2292 |
|
|
DEB_ABORT(printk(SEPARATOR_LINE));
|
| 2293 |
|
|
DEB_ABORT(printk("scsi%d : AM53C974_abort called -- trouble starts!!\n", instance->host_no));
|
| 2294 |
|
|
DEB_ABORT(AM53C974_print(instance));
|
| 2295 |
|
|
DEB_ABORT(AM53C974_keywait());
|
| 2296 |
|
|
|
| 2297 |
|
|
/* Case 1 : If the command is the currently executing command,
|
| 2298 |
|
|
we'll set the aborted flag and return control so that the
|
| 2299 |
|
|
information transfer routine can exit cleanly. */
|
| 2300 |
|
|
if ((hostdata->connected == cmd) || (hostdata->sel_cmd == cmd)) {
|
| 2301 |
|
|
DEB_ABORT(printk("scsi%d: aborting connected command\n", instance->host_no));
|
| 2302 |
|
|
hostdata->aborted = 1;
|
| 2303 |
|
|
hostdata->msgout[0] = ABORT;
|
| 2304 |
|
|
restore_flags(flags);
|
| 2305 |
|
|
return (SCSI_ABORT_PENDING);
|
| 2306 |
|
|
}
|
| 2307 |
|
|
/* Case 2 : If the command hasn't been issued yet,
|
| 2308 |
|
|
we simply remove it from the issue queue. */
|
| 2309 |
|
|
for (prev = (Scsi_Cmnd **) & (hostdata->issue_queue),
|
| 2310 |
|
|
tmp = (Scsi_Cmnd *) hostdata->issue_queue; tmp;
|
| 2311 |
|
|
prev = (Scsi_Cmnd **) & (tmp->host_scribble),
|
| 2312 |
|
|
tmp = (Scsi_Cmnd *) tmp->host_scribble) {
|
| 2313 |
|
|
if (cmd == tmp) {
|
| 2314 |
|
|
DEB_ABORT(printk("scsi%d : abort removed command from issue queue.\n", instance->host_no));
|
| 2315 |
|
|
REMOVE(5, *prev, tmp, tmp->host_scribble);
|
| 2316 |
|
|
(*prev) = (Scsi_Cmnd *) tmp->host_scribble;
|
| 2317 |
|
|
tmp->host_scribble = NULL;
|
| 2318 |
|
|
tmp->result = DID_ABORT << 16;
|
| 2319 |
|
|
restore_flags(flags);
|
| 2320 |
|
|
tmp->done(tmp);
|
| 2321 |
|
|
return (SCSI_ABORT_SUCCESS);
|
| 2322 |
|
|
}
|
| 2323 |
|
|
#ifdef AM53C974_DEBUG_ABORT
|
| 2324 |
|
|
else {
|
| 2325 |
|
|
if (prev == (Scsi_Cmnd **) tmp)
|
| 2326 |
|
|
printk("scsi%d : LOOP\n", instance->host_no);
|
| 2327 |
|
|
}
|
| 2328 |
|
|
#endif
|
| 2329 |
|
|
}
|
| 2330 |
|
|
|
| 2331 |
|
|
/* Case 3 : If any commands are connected, we're going to fail the abort
|
| 2332 |
|
|
* and let the high level SCSI driver retry at a later time or
|
| 2333 |
|
|
* issue a reset.
|
| 2334 |
|
|
*
|
| 2335 |
|
|
* Timeouts, and therefore aborted commands, will be highly unlikely
|
| 2336 |
|
|
* and handling them cleanly in this situation would make the common
|
| 2337 |
|
|
* case of noresets less efficient, and would pollute our code. So,
|
| 2338 |
|
|
* we fail. */
|
| 2339 |
|
|
if (hostdata->connected || hostdata->sel_cmd) {
|
| 2340 |
|
|
DEB_ABORT(printk("scsi%d : abort failed, other command connected.\n", instance->host_no));
|
| 2341 |
|
|
restore_flags(flags);
|
| 2342 |
|
|
return (SCSI_ABORT_NOT_RUNNING);
|
| 2343 |
|
|
}
|
| 2344 |
|
|
/* Case 4: If the command is currently disconnected from the bus, and
|
| 2345 |
|
|
* there are no connected commands, we reconnect the I_T_L or
|
| 2346 |
|
|
* I_T_L_Q nexus associated with it, go into message out, and send
|
| 2347 |
|
|
* an abort message. */
|
| 2348 |
|
|
for (tmp = (Scsi_Cmnd *) hostdata->disconnected_queue; tmp;
|
| 2349 |
|
|
tmp = (Scsi_Cmnd *) tmp->host_scribble) {
|
| 2350 |
|
|
if (cmd == tmp) {
|
| 2351 |
|
|
DEB_ABORT(printk("scsi%d: aborting disconnected command\n", instance->host_no));
|
| 2352 |
|
|
hostdata->aborted = 1;
|
| 2353 |
|
|
hostdata->msgout[0] = ABORT;
|
| 2354 |
|
|
hostdata->selecting = 1;
|
| 2355 |
|
|
hostdata->sel_cmd = tmp;
|
| 2356 |
|
|
AM53C974_write_8(CMDREG, CMDREG_DSR);
|
| 2357 |
|
|
restore_flags(flags);
|
| 2358 |
|
|
return (SCSI_ABORT_PENDING);
|
| 2359 |
|
|
}
|
| 2360 |
|
|
}
|
| 2361 |
|
|
|
| 2362 |
|
|
/* Case 5 : If we reached this point, the command was not found in any of
|
| 2363 |
|
|
* the queues.
|
| 2364 |
|
|
*
|
| 2365 |
|
|
* We probably reached this point because of an unlikely race condition
|
| 2366 |
|
|
* between the command completing successfully and the abortion code,
|
| 2367 |
|
|
* so we won't panic, but we will notify the user in case something really
|
| 2368 |
|
|
* broke. */
|
| 2369 |
|
|
DEB_ABORT(printk("scsi%d : abort failed, command not found.\n", instance->host_no));
|
| 2370 |
|
|
restore_flags(flags);
|
| 2371 |
|
|
return (SCSI_ABORT_NOT_RUNNING);
|
| 2372 |
|
|
}
|
| 2373 |
|
|
|
| 2374 |
|
|
/**************************************************************************
|
| 2375 |
|
|
* Function : int AM53C974_reset(Scsi_Cmnd *cmd)
|
| 2376 |
|
|
*
|
| 2377 |
|
|
* Purpose : reset the SCSI controller and bus
|
| 2378 |
|
|
*
|
| 2379 |
|
|
* Inputs : cmd -- which command within the command block was responsible for the reset
|
| 2380 |
|
|
*
|
| 2381 |
|
|
* Returns : status (SCSI_ABORT_SUCCESS)
|
| 2382 |
|
|
*
|
| 2383 |
|
|
* FIXME(eric) the reset_flags are ignored.
|
| 2384 |
|
|
**************************************************************************/
|
| 2385 |
|
|
static int AM53C974_reset(Scsi_Cmnd * cmd, unsigned int reset_flags)
|
| 2386 |
|
|
{
|
| 2387 |
|
|
AM53C974_local_declare();
|
| 2388 |
|
|
unsigned long flags;
|
| 2389 |
|
|
int i;
|
| 2390 |
|
|
struct Scsi_Host *instance = cmd->host;
|
| 2391 |
|
|
struct AM53C974_hostdata *hostdata = (struct AM53C974_hostdata *) instance->hostdata;
|
| 2392 |
|
|
AM53C974_setio(instance);
|
| 2393 |
|
|
|
| 2394 |
|
|
save_flags(flags);
|
| 2395 |
|
|
cli();
|
| 2396 |
|
|
DEB(printk("AM53C974_reset called; "));
|
| 2397 |
|
|
|
| 2398 |
|
|
printk("AM53C974_reset called\n");
|
| 2399 |
|
|
AM53C974_print(instance);
|
| 2400 |
|
|
AM53C974_keywait();
|
| 2401 |
|
|
|
| 2402 |
|
|
/* do hard reset */
|
| 2403 |
|
|
AM53C974_write_8(CMDREG, CMDREG_RDEV);
|
| 2404 |
|
|
AM53C974_write_8(CMDREG, CMDREG_NOP);
|
| 2405 |
|
|
hostdata->msgout[0] = NOP;
|
| 2406 |
|
|
for (i = 0; i < 8; i++) {
|
| 2407 |
|
|
hostdata->busy[i] = 0;
|
| 2408 |
|
|
hostdata->sync_per[i] = DEF_STP;
|
| 2409 |
|
|
hostdata->sync_off[i] = 0;
|
| 2410 |
|
|
hostdata->sync_neg[i] = 0;
|
| 2411 |
|
|
}
|
| 2412 |
|
|
hostdata->last_message[0] = NOP;
|
| 2413 |
|
|
hostdata->sel_cmd = NULL;
|
| 2414 |
|
|
hostdata->connected = NULL;
|
| 2415 |
|
|
hostdata->issue_queue = NULL;
|
| 2416 |
|
|
hostdata->disconnected_queue = NULL;
|
| 2417 |
|
|
hostdata->in_reset = 0;
|
| 2418 |
|
|
hostdata->aborted = 0;
|
| 2419 |
|
|
hostdata->selecting = 0;
|
| 2420 |
|
|
hostdata->disconnecting = 0;
|
| 2421 |
|
|
hostdata->dma_busy = 0;
|
| 2422 |
|
|
|
| 2423 |
|
|
/* reset bus */
|
| 2424 |
|
|
AM53C974_write_8(CNTLREG1, CNTLREG1_DISR | instance->this_id); /* disable interrupt upon SCSI RESET */
|
| 2425 |
|
|
AM53C974_write_8(CMDREG, CMDREG_RBUS); /* reset SCSI bus */
|
| 2426 |
|
|
udelay(40);
|
| 2427 |
|
|
AM53C974_config_after_reset(instance);
|
| 2428 |
|
|
|
| 2429 |
|
|
restore_flags(flags);
|
| 2430 |
|
|
cmd->result = DID_RESET << 16;
|
| 2431 |
|
|
cmd->scsi_done(cmd);
|
| 2432 |
|
|
return SCSI_ABORT_SUCCESS;
|
| 2433 |
|
|
}
|
| 2434 |
|
|
|
| 2435 |
|
|
|
| 2436 |
|
|
/*
|
| 2437 |
|
|
* AM53C974_release()
|
| 2438 |
|
|
*
|
| 2439 |
|
|
* Release resources allocated for a single AM53C974 adapter.
|
| 2440 |
|
|
*/
|
| 2441 |
|
|
static int AM53C974_release(struct Scsi_Host *shp)
|
| 2442 |
|
|
{
|
| 2443 |
|
|
free_irq(shp->irq, shp);
|
| 2444 |
|
|
scsi_unregister(shp);
|
| 2445 |
|
|
return 0;
|
| 2446 |
|
|
}
|
| 2447 |
|
|
|
| 2448 |
|
|
|
| 2449 |
|
|
/* You can specify overrides=a,b,c,d in the same format at AM53C974=a,b,c,d
|
| 2450 |
|
|
on boot up */
|
| 2451 |
|
|
MODULE_PARM(overrides, "1-32i");
|
| 2452 |
|
|
MODULE_LICENSE("GPL");
|
| 2453 |
|
|
|
| 2454 |
|
|
|
| 2455 |
|
|
static Scsi_Host_Template driver_template = AM53C974;
|
| 2456 |
|
|
#include "scsi_module.c"
|
