167 lines
5.4 KiB
C
167 lines
5.4 KiB
C
/* $NetBSD: aic7xxxvar.h,v 1.3 1996/03/29 00:25:02 mycroft Exp $ */
|
|
|
|
/*
|
|
* Interface to the generic driver for the aic7xxx based adaptec
|
|
* SCSI controllers. This is used to implement product specific
|
|
* probe and attach routines.
|
|
*
|
|
* Copyright (c) 1994, 1995 Justin T. Gibbs.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice immediately at the beginning of the file, without modification,
|
|
* this list of conditions, and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Absolutely no warranty of function or purpose is made by the author
|
|
* Justin T. Gibbs.
|
|
* 4. Modifications may be freely made to this file if the above conditions
|
|
* are met.
|
|
*/
|
|
|
|
#ifndef _AIC7XXX_H_
|
|
#define _AIC7XXX_H_
|
|
|
|
#define AHC_NSEG 256 /* number of dma segments supported */
|
|
|
|
#define AHC_SCB_MAX 16 /*
|
|
* Up to 16 SCBs on some types of aic7xxx based
|
|
* boards. The aic7770 family only have 4
|
|
*/
|
|
|
|
/* #define AHCDEBUG */
|
|
|
|
typedef u_long physaddr;
|
|
typedef u_long physlen;
|
|
|
|
struct ahc_dma_seg {
|
|
physaddr seg_addr;
|
|
physlen seg_len;
|
|
};
|
|
|
|
typedef u_char ahc_type;
|
|
#define AHC_NONE 0x00
|
|
#define AHC_WIDE 0x02 /* Wide Channel */
|
|
#define AHC_TWIN 0x08 /* Twin Channel */
|
|
#define AHC_274 0x10 /* EISA Based Controller */
|
|
#define AHC_284 0x20 /* VL/ISA Based Controller */
|
|
#define AHC_AIC7870 0x40 /* PCI Based Controller */
|
|
#define AHC_294 0xc0 /* PCI Based Controller */
|
|
|
|
/*
|
|
* The driver keeps up to MAX_SCB scb structures per card in memory. Only the
|
|
* first 26 bytes of the structure are valid for the hardware, the rest used
|
|
* for driver level bookeeping. The "__attribute ((packed))" tags ensure that
|
|
* gcc does not attempt to pad the long ints in the structure to word
|
|
* boundaries since the first 26 bytes of this structure must have the correct
|
|
* offsets for the hardware to find them. The driver is further optimized
|
|
* so that we only have to download the first 19 bytes since as long
|
|
* as we always use S/G, the last fields should be zero anyway.
|
|
*/
|
|
#if __GNUC__ >= 2
|
|
#if __GNUC_MINOR__ <5
|
|
#pragma pack(1)
|
|
#endif
|
|
#endif
|
|
|
|
struct ahc_scb {
|
|
/* ------------ Begin hardware supported fields ---------------- */
|
|
/*1*/ u_char control;
|
|
#define SCB_NEEDWDTR 0x80 /* Initiate Wide Negotiation */
|
|
#define SCB_NEEDSDTR 0x40 /* Initiate Sync Negotiation */
|
|
#define SCB_TE 0x20 /* Tag enable */
|
|
#define SCB_NEEDDMA 0x08 /* Refresh SCB from host ram */
|
|
#define SCB_DIS 0x04
|
|
#define SCB_TAG_TYPE 0x3
|
|
#define SIMPLE_QUEUE 0x0
|
|
#define HEAD_QUEUE 0x1
|
|
#define OR_QUEUE 0x2
|
|
/*2*/ u_char target_channel_lun; /* 4/1/3 bits */
|
|
/*3*/ u_char SG_segment_count;
|
|
/*7*/ physaddr SG_list_pointer __attribute__ ((packed));
|
|
/*11*/ physaddr cmdpointer __attribute__ ((packed));
|
|
/*12*/ u_char cmdlen;
|
|
/*14*/ u_char RESERVED[2]; /* must be zero */
|
|
/*15*/ u_char target_status;
|
|
/*18*/ u_char residual_data_count[3];
|
|
/*19*/ u_char residual_SG_segment_count;
|
|
#define SCB_DOWN_SIZE 19 /* amount to actually download */
|
|
#define SCB_BZERO_SIZE 19 /*
|
|
* amount we need to clear between
|
|
* commands
|
|
*/
|
|
/*23*/ physaddr data __attribute__ ((packed));
|
|
/*26*/ u_char datalen[3];
|
|
#define SCB_UP_SIZE 26 /*
|
|
* amount we need to upload to perform
|
|
* a request sense.
|
|
*/
|
|
/*30*/ physaddr host_scb __attribute__ ((packed));
|
|
/*31*/ u_char next_waiting; /* Used to thread SCBs awaiting
|
|
* selection
|
|
*/
|
|
#define SCB_LIST_NULL 0x10 /* SCB list equivelent to NULL */
|
|
#if 0
|
|
/*
|
|
* No real point in transferring this to the
|
|
* SCB registers.
|
|
*/
|
|
unsigned char RESERVED[1];
|
|
#endif
|
|
/*-----------------end of hardware supported fields----------------*/
|
|
TAILQ_ENTRY(ahc_scb) chain;
|
|
struct scsi_xfer *xs; /* the scsi_xfer for this cmd */
|
|
int flags;
|
|
#define SCB_FREE 0
|
|
#define SCB_ACTIVE 1
|
|
#define SCB_ABORTED 2
|
|
#define SCB_CHKSENSE 3
|
|
#define SCB_IMMED 4
|
|
#define SCB_IMMED_FAIL 8
|
|
int position; /* Position in scbarray */
|
|
struct ahc_dma_seg ahc_dma[AHC_NSEG] __attribute__ ((packed));
|
|
struct scsi_sense sense_cmd; /* SCSI command block */
|
|
};
|
|
|
|
#if __GNUC__ >= 2
|
|
#if __GNUC_MINOR__ <5
|
|
#pragma pack(4)
|
|
#endif
|
|
#endif
|
|
|
|
struct ahc_softc {
|
|
struct device sc_dev;
|
|
void *sc_ih;
|
|
|
|
int sc_iobase;
|
|
int sc_irq;
|
|
|
|
ahc_type type;
|
|
|
|
struct ahc_scb *scbarray[AHC_SCB_MAX]; /* Mirror boards scbarray */
|
|
TAILQ_HEAD(, ahc_scb) free_scb;
|
|
int ahc_scsi_dev; /* our scsi id */
|
|
int ahc_scsi_dev_b; /* B channel scsi id */
|
|
struct ahc_scb *immed_ecb; /* an outstanding immediete command */
|
|
struct scsi_link sc_link;
|
|
struct scsi_link sc_link_b; /* Second bus for Twin channel cards */
|
|
u_short needsdtr_orig; /* Targets we initiate sync neg with */
|
|
u_short needwdtr_orig; /* Targets we initiate wide neg with */
|
|
u_short needsdtr; /* Current list of negotiated targets */
|
|
u_short needwdtr; /* Current list of negotiated targets */
|
|
u_short sdtrpending; /* Pending SDTR to these targets */
|
|
u_short wdtrpending; /* Pending WDTR to these targets */
|
|
u_short tagenable; /* Targets that can handle tagqueing */
|
|
int numscbs;
|
|
int activescbs;
|
|
u_char maxscbs;
|
|
u_char unpause;
|
|
u_char pause;
|
|
};
|
|
|
|
#endif /* _AIC7XXX_H_ */
|