9dfa2063d5
Cleanse the SCSI subsystem of its internally defined types u_int32, u_int16, u_int8, int32, int16, int8. Use the system defined *_t types instead. aic7xxx.c: Fix the reset code. Instead of queing up all of the SCBs that timeout during timeout processing, we take the first and have it champion the effort. Any other scbs that timeout during timeout handling are given another lifetime to complete in the hopes that once timeout handing is finished, they will complete normally. If one of these SCBs times out a second time, we panic and Justin tries again. The other major change is to queue flag aborted SCBs during timeout handling, and "ahc_done" them all at once as soon as we have the controller back into a sane state. Calling ahc_done any earlier will cause the SCSI subsystem to toss the command right back at us and the attempt to queue the command will conflict with what the timeout routine is trying to accomplish. The aic7xxx driver will now respond to bus resets initiated by other devices.
208 lines
6.8 KiB
C
208 lines
6.8 KiB
C
/*
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* Interface to the generic driver for the aic7xxx based adaptec
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* SCSI controllers. This is used to implement product specific
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* probe and attach routines.
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*
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* Copyright (c) 1994, 1995, 1996 Justin T. Gibbs.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice immediately at the beginning of the file, without modification,
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* this list of conditions, and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Absolutely no warranty of function or purpose is made by the author
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* Justin T. Gibbs.
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* 4. Modifications may be freely made to this file if the above conditions
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* are met.
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*
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* $Id: aic7xxx.h,v 1.21 1996/01/30 22:56:41 mpp Exp $
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*/
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#ifndef _AIC7XXX_H_
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#define _AIC7XXX_H_
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#include "ahc.h" /* for NAHC from config */
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#define AHC_NSEG 256 /* number of dma segments supported */
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#define AHC_SCB_MAX 255 /*
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* Up to 255 SCBs on some types of aic7xxx
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* based boards. The aic7870 have 16 internal
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* SCBs, but external SRAM bumps this to 255.
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* The aic7770 family have only 4, and the
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* aic7850 has only 3.
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*/
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/* #define AHCDEBUG */
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extern int bootverbose;
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typedef unsigned long int physaddr;
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extern u_long ahc_unit;
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struct ahc_dma_seg {
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physaddr addr;
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long len;
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};
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typedef enum {
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AHC_NONE = 0x000,
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AHC_ULTRA = 0x001, /* Supports 20MHz Transfers */
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AHC_WIDE = 0x002, /* Wide Channel */
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AHC_TWIN = 0x008, /* Twin Channel */
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AHC_AIC7770 = 0x010,
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AHC_AIC7850 = 0x020,
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AHC_AIC7870 = 0x040,
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AHC_AIC7880 = 0x041,
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AHC_AIC78X0 = 0x060, /* PCI Based Controller */
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AHC_274 = 0x110, /* EISA Based Controller */
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AHC_284 = 0x210, /* VL/ISA Based Controller */
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AHC_294 = 0x440, /* PCI Based Controller */
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AHC_294U = 0x441, /* ULTRA PCI Based Controller */
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AHC_394 = 0x840, /* Twin Channel PCI Controller */
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AHC_394U = 0x841, /* Twin, ULTRA Channel PCI Controller */
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}ahc_type;
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typedef enum {
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AHC_FNONE = 0x00,
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AHC_INIT = 0x01,
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AHC_RUNNING = 0x02,
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AHC_USEDEFAULTS = 0x04, /*
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* For cards without an seeprom
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* or a BIOS to initialize the chip's
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* SRAM, we use the default chip and
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* target settings.
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*/
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AHC_EXTSCB = 0x10, /* External SCBs present */
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AHC_CHNLB = 0x20, /*
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* Second controller on 3940
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* Also encodes the offset in the
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* SEEPROM for CHNLB info (32)
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*/
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}ahc_flag;
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/*
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* The driver keeps up to MAX_SCB scb structures per card in memory. Only the
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* first 26 bytes of the structure need to be transfered to the card during
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* normal operation. The remaining fields (next_waiting and host_scb) are
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* initialized the first time an SCB is allocated in get_scb(). The fields
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* starting at byte 32 are used for kernel level bookkeeping.
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*/
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struct scb {
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/* ------------ Begin hardware supported fields ---------------- */
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/*0*/ u_char control;
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/*1*/ u_char target_channel_lun; /* 4/1/3 bits */
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/*2*/ u_char target_status;
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/*3*/ u_char SG_segment_count;
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/*4*/ physaddr SG_list_pointer;
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/*8*/ u_char residual_SG_segment_count;
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/*9*/ u_char residual_data_count[3];
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/*12*/ physaddr data;
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/*16*/ u_long datalen; /* Really only three bits, but its
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* faster to treat it as a long on
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* a quad boundary.
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*/
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/*20*/ physaddr cmdpointer;
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/*24*/ u_char cmdlen;
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#define SCB_PIO_TRANSFER_SIZE 25 /* amount we need to upload/download
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* via PIO to initialize a transaction.
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*/
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/*25*/ u_char next_waiting; /* Used to thread SCBs awaiting
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* selection
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*/
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/*-----------------end of hardware supported fields----------------*/
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struct scb *next; /* in free list */
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struct scsi_xfer *xs; /* the scsi_xfer for this cmd */
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int flags;
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#define SCB_FREE 0x00
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#define SCB_ACTIVE 0x01
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#define SCB_ABORTED 0x02
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#define SCB_DEVICE_RESET 0x04
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#define SCB_IMMED 0x08
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#define SCB_SENSE 0x10
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#define SCB_TIMEDOUT 0x20
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#define SCB_QUEUED_FOR_DONE 0x40
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int position; /* Position in scbarray */
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struct ahc_dma_seg ahc_dma[AHC_NSEG] __attribute__ ((packed));
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struct scsi_sense sense_cmd; /* SCSI command block */
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};
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struct ahc_data {
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int unit;
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ahc_type type;
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ahc_flag flags;
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u_long baseport;
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struct scb *scbarray[AHC_SCB_MAX]; /* Mirror boards scbarray */
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struct scb *free_scb;
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int our_id; /* our scsi id */
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int our_id_b; /* B channel scsi id */
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int vect;
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struct scb *immed_ecb; /* an outstanding immediate command */
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struct scsi_link sc_link;
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struct scsi_link sc_link_b; /* Second bus for Twin channel cards */
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u_short needsdtr_orig; /* Targets we initiate sync neg with */
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u_short needwdtr_orig; /* Targets we initiate wide neg with */
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u_short needsdtr; /* Current list of negotiated targets */
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u_short needwdtr; /* Current list of negotiated targets */
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u_short sdtrpending; /* Pending SDTR to these targets */
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u_short wdtrpending; /* Pending WDTR to these targets */
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u_short tagenable; /* Targets that can handle tagqueing */
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u_short discenable; /* Targets allowed to disconnect */
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int numscbs;
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int activescbs;
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u_char maxscbs;
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u_char unpause;
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u_char pause;
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u_char in_timeout;
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};
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/* Different debugging levels used when AHC_DEBUG is defined */
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#define AHC_SHOWMISC 0x0001
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#define AHC_SHOWCMDS 0x0002
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#define AHC_SHOWSCBS 0x0004
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#define AHC_SHOWABORTS 0x0008
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#define AHC_SHOWSENSE 0x0010
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#define AHC_SHOWSCBCNT 0x0020
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/* #define AHC_DEBUG */
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extern int ahc_debug; /* Initialized in i386/scsi/aic7xxx.c */
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/*
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* Since the sequencer can disable pausing in a critical section, we
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* must loop until it actually stops.
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* XXX Should add a timeout in here??
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*/
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#define PAUSE_SEQUENCER(ahc) \
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outb(HCNTRL + ahc->baseport, ahc->pause); \
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\
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while ((inb(HCNTRL + ahc->baseport) & PAUSE) == 0) \
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;
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#define UNPAUSE_SEQUENCER(ahc) \
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outb( HCNTRL + ahc->baseport, ahc->unpause )
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/*
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* Restart the sequencer program from address zero
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*/
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#define RESTART_SEQUENCER(ahc) \
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do { \
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outb( SEQCTL + ahc->baseport, SEQRESET|FASTMODE ); \
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} while (inb(SEQADDR0 + ahc->baseport) != 0 && \
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inb(SEQADDR1 + ahc->baseport != 0)); \
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\
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UNPAUSE_SEQUENCER(ahc);
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void ahc_reset __P((u_long iobase));
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struct ahc_data *ahc_alloc __P((int unit, u_long io_base, ahc_type type, ahc_flag flags));
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void ahc_free __P((struct ahc_data *));
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int ahc_init __P((struct ahc_data *));
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int ahc_attach __P((struct ahc_data *));
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void ahc_intr __P((void *arg));
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#endif /* _AIC7XXX_H_ */
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