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2709 lines
72 KiB
C
2709 lines
72 KiB
C
/*
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* Copyright (c) 1994 Charles Hannum.
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* Copyright (c) 1994 Jarle Greipsland
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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, 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Jarle Greipsland
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* $Id: aic6360.c,v 1.10 1995/08/23 23:02:25 gibbs Exp $
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*
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* Acknowledgements: Many of the algorithms used in this driver are
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* inspired by the work of Julian Elischer (julian@tfs.com) and
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* Charles Hannum (mycroft@duality.gnu.ai.mit.edu). Thanks a million!
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*
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* Converted from NetBSD to FreeBSD by Jim Babb
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*/
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/* TODO list:
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* 1) Get the DMA stuff working.
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* 2) Get the iov/uio stuff working. Is this a good thing ???
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* 3) Get the synch stuff working.
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* 4) Rewrite it to use malloc for the acb structs instead of static alloc.?
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*/
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/*
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* A few customizable items:
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*/
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/* The SCSI ID of the host adapter/computer */
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#ifndef AIC_SCSI_HOSTID
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#define AIC_SCSI_HOSTID 7
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#endif
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/* Use doubleword transfers to/from SCSI chip. Note: This requires
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* motherboard support. Basicly, some motherboard chipsets are able to
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* split a 32 bit I/O operation into two 16 bit I/O operations,
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* transparently to the processor. This speeds up some things, notably long
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* data transfers.
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*/
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#define AIC_USE_DWORDS 0
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/* Allow disconnects? Was mainly used in an early phase of the driver when
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* the message system was very flaky. Should go away soon.
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*/
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#define AIC_ALLOW_DISCONNECT 1
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/* Synchronous data transfers? (does not work yet!) XXX */
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#define AIC_USE_SYNCHRONOUS 0 /* Enable/disable (1/0) */
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#define AIC_SYNC_PERIOD 200
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#define AIC_SYNC_REQ_ACK_OFS 8
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/* Max attempts made to transmit a message */
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#define AIC_MSG_MAX_ATTEMPT 3 /* Not used now XXX */
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/* Use DMA (else we do programmed I/O using string instructions) (not yet!)*/
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#define AIC_USE_EISA_DMA 0
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#define AIC_USE_ISA_DMA 0
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/* How to behave on the (E)ISA bus when/if DMAing (on<<4) + off in us */
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#define EISA_BRST_TIM ((15<<4) + 1) /* 15us on, 1us off */
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/* Some spin loop parameters (essentially how long to wait some places)
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* The problem(?) is that sometimes we expect either to be able to transmit a
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* byte or to get a new one from the SCSI bus pretty soon. In order to avoid
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* returning from the interrupt just to get yanked back for the next byte we
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* may spin in the interrupt routine waiting for this byte to come. How long?
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* This is really (SCSI) device and processor dependent. Tuneable, I guess.
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*/
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#define AIC_MSGI_SPIN 1 /* Will spinwait upto ?ms for a new msg byte */
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#define AIC_MSGO_SPIN 1
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/* Include debug functions? At the end of this file there are a bunch of
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* functions that will print out various information regarding queued SCSI
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* commands, driver state and chip contents. You can call them from the
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* kernel debugger. If you set AIC_DEBUG to 0 they are not included (the
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* kernel uses less memory) but you lose the debugging facilities.
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*/
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#define AIC_DEBUG 0
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/* End of customizable parameters */
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#if AIC_USE_EISA_DMA || AIC_USE_ISA_DMA
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#error "I said not yet! Start paying attention... grumble"
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#endif
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#ifdef __FreeBSD__
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#include <aic.h>
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#endif
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#include <sys/types.h>
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#include <sys/param.h>
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#ifdef __FreeBSD__
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#include <sys/kernel.h>
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#endif
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/ioctl.h>
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#ifdef __FreeBSD__
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#include <sys/malloc.h>
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#else
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#include <sys/device.h>
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#endif
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#include <sys/buf.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/queue.h>
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#ifndef __FreeBSD__
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#include <machine/pio.h>
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#endif
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#include <scsi/scsi_all.h>
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#include <scsi/scsiconf.h>
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#ifdef __FreeBSD__
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#include <sys/devconf.h>
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#include <machine/clock.h>
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#include <i386/isa/isa_device.h>
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#include <sys/kernel.h>
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#else
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#include <i386/isa/isavar.h>
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#include <i386/isa/icu.h>
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#endif
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/* Definitions, most of them has turned out to be unneccesary, but here they
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* are anyway.
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*/
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/*
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* Generic SCSI messages. For now we reject most of them.
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*/
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/* Messages (1 byte) */ /* I/T M(andatory) or (O)ptional */
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#define MSG_CMDCOMPLETE 0x00 /* M/M */
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#define MSG_EXTENDED 0x01 /* O/O */
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#define MSG_SAVEDATAPOINTER 0x02 /* O/O */
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#define MSG_RESTOREPOINTERS 0x03 /* O/O */
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#define MSG_DISCONNECT 0x04 /* O/O */
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#define MSG_INITIATOR_DET_ERR 0x05 /* M/M */
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#define MSG_ABORT 0x06 /* O/M */
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#define MSG_MESSAGE_REJECT 0x07 /* M/M */
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#define MSG_NOOP 0x08 /* M/M */
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#define MSG_PARITY_ERR 0x09 /* M/M */
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#define MSG_LINK_CMD_COMPLETE 0x0a /* O/O */
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#define MSG_LINK_CMD_COMPLETEF 0x0b /* O/O */
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#define MSG_BUS_DEV_RESET 0x0c /* O/M */
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#define MSG_ABORT_TAG 0x0d /* O/O */
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#define MSG_CLEAR_QUEUE 0x0e /* O/O */
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#define MSG_INIT_RECOVERY 0x0f /* O/O */
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#define MSG_REL_RECOVERY 0x10 /* O/O */
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#define MSG_TERM_IO_PROC 0x11 /* O/O */
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/* Messages (2 byte) */
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#define MSG_SIMPLE_Q_TAG 0x20 /* O/O */
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#define MSG_HEAD_OF_Q_TAG 0x21 /* O/O */
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#define MSG_ORDERED_Q_TAG 0x22 /* O/O */
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#define MSG_IGN_WIDE_RESIDUE 0x23 /* O/O */
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/* Identify message */
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#define MSG_IDENTIFY(lun) ((AIC_ALLOW_DISCONNECT ? 0xc0 : 0x80)|((lun) & 0x7))
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#define MSG_ISIDENT(m) ((m) & 0x80)
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/* Extended messages (opcode) */
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#define MSG_EXT_SDTR 0x01
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/* SCSI Status codes */
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#define ST_GOOD 0x00
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#define ST_CHKCOND 0x02
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#define ST_CONDMET 0x04
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#define ST_BUSY 0x08
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#define ST_INTERMED 0x10
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#define ST_INTERMED_CONDMET 0x14
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#define ST_RESERVATION_CONFLICT 0x18
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#define ST_CMD_TERM 0x22
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#define ST_QUEUE_FULL 0x28
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#define ST_MASK 0x3e /* bit 0,6,7 is reserved */
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/* AIC6360 definitions */
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#define SCSISEQ (iobase + 0x00) /* SCSI sequence control */
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#define SXFRCTL0 (iobase + 0x01) /* SCSI transfer control 0 */
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#define SXFRCTL1 (iobase + 0x02) /* SCSI transfer control 1 */
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#define SCSISIGI (iobase + 0x03) /* SCSI signal in */
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#define SCSISIGO (iobase + 0x03) /* SCSI signal out */
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#define SCSIRATE (iobase + 0x04) /* SCSI rate control */
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#define SCSIID (iobase + 0x05) /* SCSI ID */
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#define SELID (iobase + 0x05) /* Selection/Reselection ID */
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#define SCSIDAT (iobase + 0x06) /* SCSI Latched Data */
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#define SCSIBUS (iobase + 0x07) /* SCSI Data Bus*/
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#define STCNT0 (iobase + 0x08) /* SCSI transfer count */
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#define STCNT1 (iobase + 0x09)
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#define STCNT2 (iobase + 0x0a)
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#define CLRSINT0 (iobase + 0x0b) /* Clear SCSI interrupts 0 */
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#define SSTAT0 (iobase + 0x0b) /* SCSI interrupt status 0 */
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#define CLRSINT1 (iobase + 0x0c) /* Clear SCSI interrupts 1 */
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#define SSTAT1 (iobase + 0x0c) /* SCSI status 1 */
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#define SSTAT2 (iobase + 0x0d) /* SCSI status 2 */
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#define SCSITEST (iobase + 0x0e) /* SCSI test control */
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#define SSTAT3 (iobase + 0x0e) /* SCSI status 3 */
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#define CLRSERR (iobase + 0x0f) /* Clear SCSI errors */
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#define SSTAT4 (iobase + 0x0f) /* SCSI status 4 */
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#define SIMODE0 (iobase + 0x10) /* SCSI interrupt mode 0 */
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#define SIMODE1 (iobase + 0x11) /* SCSI interrupt mode 1 */
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#define DMACNTRL0 (iobase + 0x12) /* DMA control 0 */
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#define DMACNTRL1 (iobase + 0x13) /* DMA control 1 */
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#define DMASTAT (iobase + 0x14) /* DMA status */
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#define FIFOSTAT (iobase + 0x15) /* FIFO status */
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#define DMADATA (iobase + 0x16) /* DMA data */
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#define DMADATAL (iobase + 0x16) /* DMA data low byte */
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#define DMADATAH (iobase + 0x17) /* DMA data high byte */
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#define BRSTCNTRL (iobase + 0x18) /* Burst Control */
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#define DMADATALONG (iobase + 0x18)
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#define PORTA (iobase + 0x1a) /* Port A */
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#define PORTB (iobase + 0x1b) /* Port B */
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#define REV (iobase + 0x1c) /* Revision (001 for 6360) */
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#define STACK (iobase + 0x1d) /* Stack */
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#define TEST (iobase + 0x1e) /* Test register */
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#define ID (iobase + 0x1f) /* ID register */
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#define IDSTRING "(C)1991ADAPTECAIC6360 "
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/* What all the bits do */
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/* SCSISEQ */
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#define TEMODEO 0x80
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#define ENSELO 0x40
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#define ENSELI 0x20
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#define ENRESELI 0x10
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#define ENAUTOATNO 0x08
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#define ENAUTOATNI 0x04
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#define ENAUTOATNP 0x02
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#define SCSIRSTO 0x01
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/* SXFRCTL0 */
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#define SCSIEN 0x80
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#define DMAEN 0x40
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#define CHEN 0x20
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#define CLRSTCNT 0x10
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#define SPIOEN 0x08
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#define CLRCH 0x02
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/* SXFRCTL1 */
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#define BITBUCKET 0x80
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#define SWRAPEN 0x40
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#define ENSPCHK 0x20
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#define STIMESEL1 0x10
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#define STIMESEL0 0x08
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#define STIMO_256ms 0x00
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#define STIMO_128ms 0x08
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#define STIMO_64ms 0x10
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#define STIMO_32ms 0x18
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#define ENSTIMER 0x04
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#define BYTEALIGN 0x02
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/* SCSISIGI */
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#define CDI 0x80
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#define IOI 0x40
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#define MSGI 0x20
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#define ATNI 0x10
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#define SELI 0x08
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#define BSYI 0x04
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#define REQI 0x02
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#define ACKI 0x01
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/* Important! The 3 most significant bits of this register, in initiator mode,
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* represents the "expected" SCSI bus phase and can be used to trigger phase
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* mismatch and phase change interrupts. But more important: If there is a
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* phase mismatch the chip will not transfer any data! This is actually a nice
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* feature as it gives us a bit more control over what is happening when we are
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* bursting data (in) through the FIFOs and the phase suddenly changes from
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* DATA IN to STATUS or MESSAGE IN. The transfer will stop and wait for the
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* proper phase to be set in this register instead of dumping the bits into the
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* FIFOs.
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*/
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/* SCSISIGO */
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#define CDO 0x80
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#define CDEXP (CDO)
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#define IOO 0x40
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#define IOEXP (IOO)
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#define MSGO 0x20
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#define MSGEXP (MSGO)
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#define ATNO 0x10
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#define SELO 0x08
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#define BSYO 0x04
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#define REQO 0x02
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#define ACKO 0x01
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/* Information transfer phases */
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#define PH_DOUT (0)
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#define PH_DIN (IOI)
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#define PH_CMD (CDI)
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#define PH_STAT (CDI|IOI)
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#define PH_MSGO (MSGI|CDI)
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#define PH_MSGI (MSGI|CDI|IOI)
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#define PH_MASK 0xe0
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/* Some pseudo phases for getphase()*/
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#define PH_BUSFREE 0x100 /* (Re)Selection no longer valid */
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#define PH_INVALID 0x101 /* (Re)Selection valid, but no REQ yet */
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#define PH_PSBIT 0x100 /* "pseudo" bit */
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/* SCSIRATE */
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#define SXFR2 0x40
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#define SXFR1 0x20
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#define SXFR0 0x10
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#define SOFS3 0x08
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#define SOFS2 0x04
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#define SOFS1 0x02
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#define SOFS0 0x01
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/* SCSI ID */
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#define OID2 0x40
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#define OID1 0x20
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#define OID0 0x10
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#define OID_S 4 /* shift value */
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#define TID2 0x04
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#define TID1 0x02
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#define TID0 0x01
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#define SCSI_ID_MASK 0x7
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/* SCSI selection/reselection ID (both target *and* initiator) */
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#define SELID7 0x80
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#define SELID6 0x40
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#define SELID5 0x20
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#define SELID4 0x10
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#define SELID3 0x08
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#define SELID2 0x04
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#define SELID1 0x02
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#define SELID0 0x01
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/* CLRSINT0 Clears what? (interrupt and/or status bit) */
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#define SETSDONE 0x80
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#define CLRSELDO 0x40 /* I */
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#define CLRSELDI 0x20 /* I+ */
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#define CLRSELINGO 0x10 /* I */
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#define CLRSWRAP 0x08 /* I+S */
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||
#define CLRSDONE 0x04 /* I+S */
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||
#define CLRSPIORDY 0x02 /* I */
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||
#define CLRDMADONE 0x01 /* I */
|
||
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||
/* SSTAT0 Howto clear */
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||
#define TARGET 0x80
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||
#define SELDO 0x40 /* Selfclearing */
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||
#define SELDI 0x20 /* Selfclearing when CLRSELDI is set */
|
||
#define SELINGO 0x10 /* Selfclearing */
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||
#define SWRAP 0x08 /* CLRSWAP */
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||
#define SDONE 0x04 /* Not used in initiator mode */
|
||
#define SPIORDY 0x02 /* Selfclearing (op on SCSIDAT) */
|
||
#define DMADONE 0x01 /* Selfclearing (all FIFOs empty & T/C */
|
||
|
||
/* CLRSINT1 Clears what? */
|
||
#define CLRSELTIMO 0x80 /* I+S */
|
||
#define CLRATNO 0x40
|
||
#define CLRSCSIRSTI 0x20 /* I+S */
|
||
#define CLRBUSFREE 0x08 /* I+S */
|
||
#define CLRSCSIPERR 0x04 /* I+S */
|
||
#define CLRPHASECHG 0x02 /* I+S */
|
||
#define CLRREQINIT 0x01 /* I+S */
|
||
|
||
/* SSTAT1 How to clear? When set?*/
|
||
#define SELTO 0x80 /* C select out timeout */
|
||
#define ATNTARG 0x40 /* Not used in initiator mode */
|
||
#define SCSIRSTI 0x20 /* C RST asserted */
|
||
#define PHASEMIS 0x10 /* Selfclearing */
|
||
#define BUSFREE 0x08 /* C bus free condition */
|
||
#define SCSIPERR 0x04 /* C parity error on inbound data */
|
||
#define PHASECHG 0x02 /* C phase in SCSISIGI doesn't match */
|
||
#define REQINIT 0x01 /* C or ACK asserting edge of REQ */
|
||
|
||
/* SSTAT2 */
|
||
#define SOFFSET 0x20
|
||
#define SEMPTY 0x10
|
||
#define SFULL 0x08
|
||
#define SFCNT2 0x04
|
||
#define SFCNT1 0x02
|
||
#define SFCNT0 0x01
|
||
|
||
/* SCSITEST */
|
||
#define SCTESTU 0x08
|
||
#define SCTESTD 0x04
|
||
#define STCTEST 0x01
|
||
|
||
/* SSTAT3 */
|
||
#define SCSICNT3 0x80
|
||
#define SCSICNT2 0x40
|
||
#define SCSICNT1 0x20
|
||
#define SCSICNT0 0x10
|
||
#define OFFCNT3 0x08
|
||
#define OFFCNT2 0x04
|
||
#define OFFCNT1 0x02
|
||
#define OFFCNT0 0x01
|
||
|
||
/* CLRSERR */
|
||
#define CLRSYNCERR 0x04
|
||
#define CLRFWERR 0x02
|
||
#define CLRFRERR 0x01
|
||
|
||
/* SSTAT4 */
|
||
#define SYNCERR 0x04
|
||
#define FWERR 0x02
|
||
#define FRERR 0x01
|
||
|
||
/* SIMODE0 */
|
||
#define ENSELDO 0x40
|
||
#define ENSELDI 0x20
|
||
#define ENSELINGO 0x10
|
||
#define ENSWRAP 0x08
|
||
#define ENSDONE 0x04
|
||
#define ENSPIORDY 0x02
|
||
#define ENDMADONE 0x01
|
||
|
||
/* SIMODE1 */
|
||
#define ENSELTIMO 0x80
|
||
#define ENATNTARG 0x40
|
||
#define ENSCSIRST 0x20
|
||
#define ENPHASEMIS 0x10
|
||
#define ENBUSFREE 0x08
|
||
#define ENSCSIPERR 0x04
|
||
#define ENPHASECHG 0x02
|
||
#define ENREQINIT 0x01
|
||
|
||
/* DMACNTRL0 */
|
||
#define ENDMA 0x80
|
||
#define B8MODE 0x40
|
||
#define DMA 0x20
|
||
#define DWORDPIO 0x10
|
||
#define WRITE 0x08
|
||
#define INTEN 0x04
|
||
#define RSTFIFO 0x02
|
||
#define SWINT 0x01
|
||
|
||
/* DMACNTRL1 */
|
||
#define PWRDWN 0x80
|
||
#define ENSTK32 0x40
|
||
#define STK4 0x10
|
||
#define STK3 0x08
|
||
#define STK2 0x04
|
||
#define STK1 0x02
|
||
#define STK0 0x01
|
||
|
||
/* DMASTAT */
|
||
#define ATDONE 0x80
|
||
#define WORDRDY 0x40
|
||
#define INTSTAT 0x20
|
||
#define DFIFOFULL 0x10
|
||
#define DFIFOEMP 0x08
|
||
#define DFIFOHF 0x04
|
||
#define DWORDRDY 0x02
|
||
|
||
/* BRSTCNTRL */
|
||
#define BON3 0x80
|
||
#define BON2 0x40
|
||
#define BON1 0x20
|
||
#define BON0 0x10
|
||
#define BOFF3 0x08
|
||
#define BOFF2 0x04
|
||
#define BOFF1 0x02
|
||
#define BOFF0 0x01
|
||
|
||
/* TEST */
|
||
#define BOFFTMR 0x40
|
||
#define BONTMR 0x20
|
||
#define STCNTH 0x10
|
||
#define STCNTM 0x08
|
||
#define STCNTL 0x04
|
||
#define SCSIBLK 0x02
|
||
#define DMABLK 0x01
|
||
|
||
|
||
#define orreg(reg, val) outb((reg), inb(reg)| (val))
|
||
#define andreg(reg, val) outb((reg), inb(reg)& (val))
|
||
#define nandreg(reg, val) outb((reg), inb(reg)&~(val))
|
||
|
||
|
||
|
||
#ifdef DDB
|
||
#define fatal_if_no_DDB()
|
||
#else
|
||
#define fatal_if_no_DDB() panic("panic for historical reasons")
|
||
#endif
|
||
|
||
typedef u_long physaddr;
|
||
|
||
struct aic_dma_seg {
|
||
physaddr addr;
|
||
long len;
|
||
};
|
||
|
||
#ifdef __FreeBSD__
|
||
#define DELAYCOUNT 16
|
||
#else
|
||
extern int delaycount;
|
||
#endif
|
||
|
||
#define FUDGE(X) ((X)>>1) /* get 1 ms spincount */
|
||
#define MINIFUDGE(X) ((X)>>4) /* get (approx) 125us spincount */
|
||
#define AIC_NSEG 16
|
||
#define NUM_CONCURRENT 7 /* Only one per target for now */
|
||
|
||
/*
|
||
* ACB. Holds additional information for each SCSI command Comments: We
|
||
* need a separate scsi command block because we may need to overwrite it
|
||
* with a request sense command. Basicly, we refrain from fiddling with
|
||
* the scsi_xfer struct (except do the expected updating of return values).
|
||
* We'll generally update: xs->{flags,resid,error,sense,status} and
|
||
* occasionally xs->retries.
|
||
*/
|
||
|
||
struct acb {
|
||
TAILQ_ENTRY(acb) chain;
|
||
struct scsi_xfer *xs; /* SCSI xfer ctrl block from above */
|
||
int flags; /* Status */
|
||
#define ACB_FREE 0x00
|
||
#define ACB_ACTIVE 0x01
|
||
#define ACB_DONE 0x04
|
||
#define ACB_CHKSENSE 0x08
|
||
/* struct aic_dma_seg dma[AIC_NSEG]; */ /* Physical addresses+len */
|
||
struct scsi_generic cmd; /* SCSI command block */
|
||
int clen;
|
||
char *daddr; /* Saved data pointer */
|
||
int dleft; /* Residue */
|
||
int stat; /* SCSI status byte */
|
||
};
|
||
|
||
/*
|
||
* Some info about each (possible) target on the SCSI bus. This should
|
||
* probably have been a "per target+lunit" structure, but we'll leave it at
|
||
* this for now. Is there a way to reliably hook it up to sc->fordriver??
|
||
*/
|
||
struct aic_tinfo {
|
||
int cmds; /* #commands processed */
|
||
int dconns; /* #disconnects */
|
||
int touts; /* #timeouts */
|
||
int perrs; /* #parity errors */
|
||
int senses; /* #request sense commands sent */
|
||
ushort lubusy; /* What local units/subr. are busy? */
|
||
u_char flags;
|
||
#define NEED_TO_RESET 0x01 /* Should send a BUS_DEV_RESET */
|
||
#define DO_NEGOTIATE 0x02 /* (Re)Negotiate synchronous options */
|
||
#define TARGET_BUSY 0x04 /* Target is busy, i.e. cmd in progress */
|
||
u_char persgst; /* Period suggestion */
|
||
u_char offsgst; /* Offset suggestion */
|
||
u_char syncdata; /* True negotiated synch parameters */
|
||
} tinfo_t;
|
||
|
||
/* Register a linenumber (for debugging) */
|
||
#if AIC_DEBUG
|
||
#define LOGLINE(p) \
|
||
do { \
|
||
p->history[p->hp] = __LINE__; \
|
||
p->hp = ++p->hp % AIC_HSIZE; \
|
||
} while (0)
|
||
#else
|
||
#define LOGLINE(p)
|
||
#endif
|
||
|
||
#ifdef __FreeBSD__
|
||
struct aic_data { /* One of these per adapter */
|
||
#else
|
||
struct aic_softc { /* One of these per adapter */
|
||
/* Auto config stuff */
|
||
struct device sc_dev; /* This one has to go first! */
|
||
struct isadev sc_id;
|
||
struct intrhand sc_ih;
|
||
struct scsi_link sc_link; /* prototype for subdevs */
|
||
int id_irq; /* IRQ on the EISA bus */
|
||
int id_drq; /* DRQ on the EISA bus */
|
||
#endif
|
||
u_short iobase; /* Base I/O port */
|
||
#ifdef __FreeBSD__
|
||
struct scsi_link sc_link; /* prototype for subdevs */
|
||
int aic_int; /* IRQ on the EISA bus */
|
||
int aic_dma; /* DRQ on the EISA bus */
|
||
#endif
|
||
/* Lists of command blocks */
|
||
TAILQ_HEAD(acb_list, acb) free_list, ready_list, nexus_list;
|
||
struct acb *nexus; /* current command */
|
||
/* Command blocks and target info */
|
||
struct acb acb[NUM_CONCURRENT];
|
||
struct aic_tinfo tinfo[8];
|
||
/* Data about the current nexus (updated for every cmd switch) */
|
||
u_char *dp; /* Current data pointer */
|
||
int dleft; /* Data left to transfer */
|
||
/* Adapter state */
|
||
short phase; /* Copy of what bus phase we are in */
|
||
short prevphase; /* Copy of what bus phase we were in */
|
||
short state; /* State applicable to the adapter */
|
||
#define AIC_IDLE 0x01
|
||
#define AIC_TMP_UNAVAIL 0x02 /* Don't accept SCSI commands */
|
||
#define AIC_SELECTING 0x03 /* SCSI command is arbiting */
|
||
#define AIC_RESELECTED 0x04 /* Has been reselected */
|
||
#define AIC_HASNEXUS 0x05 /* Actively using the SCSI bus */
|
||
#define AIC_CLEANING 0x06
|
||
short flags;
|
||
#define AIC_DROP_MSGI 0x01 /* Discard all msgs (parity err detected) */
|
||
#define AIC_DOINGDMA 0x02 /* The FIFO data path is active! */
|
||
#define AIC_BUSFREE_OK 0x04 /* Bus free phase is OK. */
|
||
#define AIC_SYNCHNEGO 0x08 /* Synch negotiation in progress. */
|
||
#define AIC_BLOCKED 0x10 /* Don't schedule new scsi bus operations */
|
||
/* Debugging stuff */
|
||
#define AIC_HSIZE 8
|
||
short history[AIC_HSIZE]; /* Store line numbers here. */
|
||
short hp;
|
||
u_char progress; /* Set if interrupt has achieved progress */
|
||
/* Message stuff */
|
||
u_char msgpriq; /* One or more messages to send (encoded) */
|
||
u_char msgout; /* What message is on its way out? */
|
||
#define SEND_DEV_RESET 0x01
|
||
#define SEND_PARITY_ERROR 0x02
|
||
#define SEND_ABORT 0x04
|
||
#define SEND_REJECT 0x08
|
||
#define SEND_INIT_DET_ERR 0x10
|
||
#define SEND_IDENTIFY 0x20
|
||
#define SEND_SDTR 0x40
|
||
#define AIC_MAX_MSG_LEN 8
|
||
u_char omess[AIC_MAX_MSG_LEN]; /* Scratch area for messages */
|
||
u_char *omp; /* Message pointer (for multibyte messages) */
|
||
u_char omlen;
|
||
u_char imess[AIC_MAX_MSG_LEN + 1];
|
||
u_char *imp; /* Message pointer (for multibyte messages) */
|
||
u_char imlen;
|
||
#ifdef __FreeBSD__
|
||
} *aicdata[NAIC];
|
||
#else
|
||
};
|
||
#endif
|
||
|
||
#define AIC_SHOWACBS 0x01
|
||
#define AIC_SHOWINTS 0x02
|
||
#define AIC_SHOWCMDS 0x04
|
||
#define AIC_SHOWMISC 0x08
|
||
#define AIC_SHOWTRAC 0x10
|
||
#define AIC_SHOWSTART 0x20
|
||
int aic_debug = 0; /* AIC_SHOWSTART|AIC_SHOWMISC|AIC_SHOWTRAC; */
|
||
|
||
#if AIC_DEBUG
|
||
#define AIC_ACBS(str) do {if (aic_debug & AIC_SHOWACBS) printf str;} while (0)
|
||
#define AIC_MISC(str) do {if (aic_debug & AIC_SHOWMISC) printf str;} while (0)
|
||
#define AIC_INTS(str) do {if (aic_debug & AIC_SHOWINTS) printf str;} while (0)
|
||
#define AIC_TRACE(str) do {if (aic_debug & AIC_SHOWTRAC) printf str;} while (0)
|
||
#define AIC_CMDS(str) do {if (aic_debug & AIC_SHOWCMDS) printf str;} while (0)
|
||
#define AIC_START(str) do {if (aic_debug & AIC_SHOWSTART) printf str;}while (0)
|
||
#else
|
||
#define AIC_ACBS(str)
|
||
#define AIC_MISC(str)
|
||
#define AIC_INTS(str)
|
||
#define AIC_TRACE(str)
|
||
#define AIC_CMDS(str)
|
||
#define AIC_START(str)
|
||
#endif
|
||
|
||
#ifdef __FreeBSD__
|
||
int aicprobe __P((struct isa_device *));
|
||
int aicattach __P((struct isa_device *));
|
||
#else
|
||
int aicprobe __P((struct device *, struct device *, void *));
|
||
void aicattach __P((struct device *, struct device *, void *));
|
||
#endif
|
||
void aic_minphys __P((struct buf *));
|
||
#ifdef __FreeBSD__
|
||
u_int32 aic_adapter_info __P((int));
|
||
inthand2_t aicintr;
|
||
void aic_init __P((struct aic_data *));
|
||
int aic_find __P((struct aic_data *));
|
||
#else
|
||
u_int aic_adapter_info __P((struct aic_softc *));
|
||
int aicintr __P((struct aic_softc *));
|
||
void aic_init __P((struct aic_softc *));
|
||
#endif
|
||
void aic_done __P((struct acb *));
|
||
#ifdef __FreeBSD__
|
||
int32 aic_scsi_cmd __P((struct scsi_xfer *));
|
||
int aic_poll __P((int, struct acb *));
|
||
#else
|
||
int aic_scsi_cmd __P((struct scsi_xfer *));
|
||
int aic_poll __P((struct aic_softc *, struct acb *));
|
||
#endif
|
||
void aic_add_timeout __P((struct acb *, int));
|
||
void aic_remove_timeout __P((struct acb *));
|
||
#ifdef __FreeBSD__
|
||
timeout_t aic_timeout;
|
||
void aic_sched __P((struct aic_data *));
|
||
void aic_scsi_reset __P((struct aic_data *));
|
||
#else
|
||
void aic_timeout __P((void *arg));
|
||
int aic_find __P((struct aic_softc *));
|
||
void aic_sched __P((struct aic_softc *));
|
||
void aic_scsi_reset __P((struct aic_softc *));
|
||
#endif
|
||
#if AIC_DEBUG
|
||
void aic_print_active_acb();
|
||
void aic_dump_driver();
|
||
void aic_dump6360();
|
||
#endif
|
||
|
||
/* Linkup to the rest of the kernel */
|
||
#ifdef __FreeBSD__
|
||
struct isa_driver aicdriver = {
|
||
aicprobe, aicattach, "aic"
|
||
};
|
||
|
||
static int aicunit = 0;
|
||
#else
|
||
struct cfdriver aiccd = {
|
||
NULL, "aic", aicprobe, aicattach, DV_DULL, sizeof(struct aic_softc)
|
||
#endif
|
||
|
||
struct scsi_adapter aic_switch = {
|
||
aic_scsi_cmd,
|
||
aic_minphys,
|
||
0,
|
||
0,
|
||
aic_adapter_info,
|
||
"aic"
|
||
#ifdef __FreeBSD__
|
||
,0 , 0
|
||
#endif
|
||
};
|
||
|
||
struct scsi_device aic_dev = {
|
||
NULL, /* Use default error handler */
|
||
NULL, /* have a queue, served by this */
|
||
NULL, /* have no async handler */
|
||
NULL, /* Use default 'done' routine */
|
||
"aic",
|
||
0
|
||
};
|
||
|
||
static struct kern_devconf kdc_aic[NAIC] = { {
|
||
0, 0, 0, /* filled in by dev_attach */
|
||
"aic", 0, { MDDT_ISA, 0, "bio" },
|
||
isa_generic_externalize, 0, 0, ISA_EXTERNALLEN,
|
||
&kdc_isa0, /* parent */
|
||
0, /* parentdata */
|
||
DC_UNCONFIGURED, /* start out in unconfig state */
|
||
"Adaptec AIC-6360 SCSI host adapter chipset",
|
||
DC_CLS_MISC /* host adapters aren't special */
|
||
} };
|
||
|
||
static inline void
|
||
aic_registerdev(struct isa_device *id)
|
||
{
|
||
if(id->id_unit)
|
||
kdc_aic[id->id_unit] = kdc_aic[0];
|
||
kdc_aic[id->id_unit].kdc_unit = id->id_unit;
|
||
kdc_aic[id->id_unit].kdc_parentdata = id;
|
||
dev_attach(&kdc_aic[id->id_unit]);
|
||
}
|
||
|
||
/*
|
||
* INITIALIZATION ROUTINES (probe, attach ++)
|
||
*/
|
||
|
||
/*
|
||
* aicprobe: probe for AIC6360 SCSI-controller
|
||
* returns non-zero value if a controller is found.
|
||
*/
|
||
int
|
||
#ifdef __FreeBSD__
|
||
aicprobe(dev)
|
||
struct isa_device *dev;
|
||
#else
|
||
aicprobe(parent, self, aux)
|
||
struct device *parent, *self;
|
||
void *aux;
|
||
#endif
|
||
{
|
||
#ifdef __FreeBSD__
|
||
int unit = aicunit;
|
||
struct aic_data *aic;
|
||
#else
|
||
struct aic_softc *aic = (void *)self;
|
||
struct isa_attach_args *ia = aux;
|
||
#endif
|
||
int i, len, ic;
|
||
|
||
#ifdef __FreeBSD__
|
||
if (unit >= NAIC) {
|
||
printf("aic%d: unit number too high\n", unit);
|
||
return 0;
|
||
}
|
||
dev->id_unit = unit;
|
||
/*
|
||
* Allocate a storage area for us
|
||
*/
|
||
if (aicdata[unit]) {
|
||
printf("aic%d: memory already allocated\n", unit);
|
||
return 0;
|
||
}
|
||
aic = malloc(sizeof(struct aic_data), M_TEMP, M_NOWAIT);
|
||
if (!aic) {
|
||
printf("aic%d: cannot malloc!\n", unit);
|
||
return 0;
|
||
}
|
||
bzero(aic, sizeof(struct aic_data));
|
||
aicdata[unit] = aic;
|
||
aic->iobase = dev->id_iobase;
|
||
#ifndef DEV_LKM
|
||
aic_registerdev(dev);
|
||
#endif /* not DEV_LKM */
|
||
|
||
if (aic_find(aic) != 0) {
|
||
aicdata[unit] = NULL;
|
||
free(aic, M_TEMP);
|
||
return 0;
|
||
}
|
||
aicunit++;
|
||
return 0x20;
|
||
#else
|
||
#ifdef NEWCONFIG
|
||
if (ia->ia_iobase == IOBASEUNK)
|
||
return 0;
|
||
#endif
|
||
aic->iobase = ia->ia_iobase;
|
||
if (aic_find(aic) != 0)
|
||
return 0;
|
||
#ifdef NEWCONFIG
|
||
if (ia->ia_irq == IRQUNK)
|
||
ia->ia_irq = (1 << aic->aic_int);
|
||
else if (ia->ia_irq != (1 << aic->aic_int)) {
|
||
printf("aic%d: irq mismatch, %x != %x\n",
|
||
aic->sc_dev.dv_unit, ia->ia_irq, 1 << aic->aic_int);
|
||
return 0;
|
||
}
|
||
|
||
if (ia->ia_drq == DRQUNK)
|
||
ia->ia_drq = aic->aic_dma;
|
||
else if (ia->ia_drq != aic->aic_dma) {
|
||
printf("aic%d: drq mismatch, %x != %x\n",
|
||
aic->sc_dev.dv_unit, ia->ia_drq, aic->aic_dma);
|
||
return 0;
|
||
#endif
|
||
}
|
||
ia->ia_msize = 0;
|
||
ia->ia_iosize = 0x20;
|
||
return 1;
|
||
}
|
||
#endif
|
||
}
|
||
|
||
/* Do the real search-for-device.
|
||
* Prerequisite: aic->iobase should be set to the proper value
|
||
*/
|
||
int
|
||
aic_find(aic)
|
||
#ifdef __FreeBSD__
|
||
struct aic_data *aic;
|
||
#else
|
||
struct aic_softc *aic;
|
||
#endif
|
||
{
|
||
u_short iobase = aic->iobase;
|
||
char chip_id[sizeof(IDSTRING)]; /* For chips that support it */
|
||
char *start;
|
||
int i;
|
||
|
||
/* Remove aic6360 from possible powerdown mode */
|
||
outb(DMACNTRL0, 0);
|
||
|
||
/* Thanks to mark@aggregate.com for the new method for detecting
|
||
* whether the chip is present or not. Bonus: may also work for
|
||
* the AIC-6260!
|
||
*/
|
||
AIC_TRACE(("aic: probing for aic-chip at port 0x%x\n",(int)iobase));
|
||
/*
|
||
* Linux also init's the stack to 1-16 and then clears it,
|
||
* 6260's don't appear to have an ID reg - mpg
|
||
*/
|
||
/* Push the sequence 0,1,..,15 on the stack */
|
||
#define STSIZE 16
|
||
outb(DMACNTRL1, 0); /* Reset stack pointer */
|
||
for (i = 0; i < STSIZE; i++)
|
||
outb(STACK, i);
|
||
|
||
/* See if we can pull out the same sequence */
|
||
outb(DMACNTRL1, 0);
|
||
for (i = 0; i < STSIZE && inb(STACK) == i; i++)
|
||
;
|
||
if (i != STSIZE) {
|
||
AIC_START(("STACK futzed at %d.\n", i));
|
||
return ENXIO;
|
||
}
|
||
|
||
/* See if we can pull the id string out of the ID register,
|
||
* now only used for informational purposes.
|
||
*/
|
||
bzero(chip_id, sizeof(chip_id));
|
||
insb(ID, chip_id, sizeof(IDSTRING)-1);
|
||
AIC_START(("AIC found at 0x%x ", (int)aic->iobase));
|
||
AIC_START(("ID: %s ",chip_id));
|
||
AIC_START(("chip revision %d\n",(int)inb(REV)));
|
||
return 0;
|
||
}
|
||
|
||
#ifndef __FreeBSD__
|
||
int
|
||
aicprint()
|
||
{
|
||
}
|
||
#endif
|
||
|
||
/*
|
||
* Attach the AIC6360, fill out some high and low level data structures
|
||
*/
|
||
#ifdef __FreeBSD__
|
||
int
|
||
aicattach(dev)
|
||
struct isa_device *dev;
|
||
#else
|
||
void
|
||
aicattach(parent, self, aux)
|
||
struct device *parent, *self;
|
||
void *aux;
|
||
#endif
|
||
{
|
||
#ifdef __FreeBSD__
|
||
int unit = dev->id_unit;
|
||
struct aic_data *aic = aicdata[unit];
|
||
struct scsibus_data *scbus;
|
||
#else
|
||
struct isa_attach_args *ia = aux;
|
||
struct aic_softc *aic = (void *)self;
|
||
#endif
|
||
|
||
AIC_TRACE(("aicattach\n"));
|
||
aic->state = 0;
|
||
aic_scsi_reset(aic);
|
||
aic_init(aic); /* Init chip and driver */
|
||
|
||
/*
|
||
* Fill in the prototype scsi_link
|
||
*/
|
||
#ifdef __FreeBSD__
|
||
aic->sc_link.adapter_unit = unit;
|
||
#else
|
||
aic->sc_link.adapter_softc = aic;
|
||
#endif
|
||
aic->sc_link.adapter_targ = AIC_SCSI_HOSTID;
|
||
aic->sc_link.adapter = &aic_switch;
|
||
aic->sc_link.device = &aic_dev;
|
||
|
||
#ifdef __FreeBSD__
|
||
/*
|
||
* Prepare the scsibus_data area for the upperlevel
|
||
* scsi code.
|
||
*/
|
||
scbus = scsi_alloc_bus();
|
||
if(!scbus)
|
||
return 0;
|
||
scbus->adapter_link = &aic->sc_link;
|
||
|
||
/*
|
||
* ask the adapter what subunits are present
|
||
*/
|
||
kdc_aic[unit].kdc_state = DC_BUSY; /* host adapters are always busy */
|
||
scsi_attachdevs(scbus);
|
||
|
||
return 1;
|
||
#else
|
||
printf("\n");
|
||
#ifdef NEWCONFIG
|
||
isa_establish(&aic->sc_id, &aic->sc_dev);
|
||
#endif
|
||
aic->sc_ih.ih_fun = aicintr;
|
||
aic->sc_ih.ih_arg = aic;
|
||
aic->sc_ih.ih_level = IPL_BIO;
|
||
intr_establish(ia->ia_irq, &aic->sc_ih);
|
||
|
||
config_found(self, &aic->sc_link, aicprint);
|
||
#endif
|
||
}
|
||
|
||
|
||
/* Initialize AIC6360 chip itself
|
||
* The following conditions should hold:
|
||
* aicprobe should have succeeded, i.e. the iobase address in aic_data must
|
||
* be valid.
|
||
*/
|
||
static void
|
||
aic6360_reset(aic)
|
||
#ifdef __FreeBSD__
|
||
struct aic_data *aic;
|
||
#else
|
||
struct aic_softc *aic;
|
||
#endif
|
||
{
|
||
u_short iobase = aic->iobase;
|
||
|
||
outb(SCSITEST, 0); /* Doc. recommends to clear these two */
|
||
outb(TEST, 0); /* registers before operations commence */
|
||
|
||
/* Reset SCSI-FIFO and abort any transfers */
|
||
outb(SXFRCTL0, CHEN|CLRCH|CLRSTCNT);
|
||
|
||
/* Reset DMA-FIFO */
|
||
outb(DMACNTRL0, RSTFIFO);
|
||
outb(DMACNTRL1, 0);
|
||
|
||
outb(SCSISEQ, 0); /* Disable all selection features */
|
||
outb(SXFRCTL1, 0);
|
||
|
||
outb(SIMODE0, 0x00); /* Disable some interrupts */
|
||
outb(CLRSINT0, 0x7f); /* Clear a slew of interrupts */
|
||
|
||
outb(SIMODE1, 0x00); /* Disable some more interrupts */
|
||
outb(CLRSINT1, 0xef); /* Clear another slew of interrupts */
|
||
|
||
outb(SCSIRATE, 0); /* Disable synchronous transfers */
|
||
|
||
outb(CLRSERR, 0x07); /* Haven't seen ant errors (yet) */
|
||
|
||
outb(SCSIID, AIC_SCSI_HOSTID << OID_S); /* Set our SCSI-ID */
|
||
outb(BRSTCNTRL, EISA_BRST_TIM);
|
||
}
|
||
|
||
/* Pull the SCSI RST line for 500 us */
|
||
void
|
||
aic_scsi_reset(aic)
|
||
#ifdef __FreeBSD__
|
||
struct aic_data *aic;
|
||
#else
|
||
struct aic_softc *aic;
|
||
#endif
|
||
{
|
||
u_short iobase = aic->iobase;
|
||
|
||
outb(SCSISEQ, SCSIRSTO);
|
||
#ifdef __FreeBSD__
|
||
DELAY(500);
|
||
#else
|
||
delay(500);
|
||
#endif
|
||
outb(SCSISEQ, 0);
|
||
#ifdef __FreeBSD__
|
||
DELAY(50);
|
||
#else
|
||
delay(50);
|
||
#endif
|
||
}
|
||
|
||
/*
|
||
* Initialize aic SCSI driver, also (conditonally) reset the SCSI bus.
|
||
* The reinitialization is still buggy (e.g. on SCSI resets).
|
||
*/
|
||
void
|
||
aic_init(aic)
|
||
#ifdef __FreeBSD__
|
||
struct aic_data *aic;
|
||
#else
|
||
struct aic_softc *aic;
|
||
#endif
|
||
{
|
||
u_short iobase = aic->iobase;
|
||
struct acb *acb;
|
||
int r;
|
||
|
||
/* Reset the SCSI-bus itself */
|
||
aic_scsi_reset(aic);
|
||
|
||
aic6360_reset(aic); /* Clean up our own hardware */
|
||
|
||
/*XXX*/ /* If not the first time (probably a reset condition),
|
||
* we should clean queues with active commands
|
||
*/
|
||
if (aic->state == 0) { /* First time through */
|
||
TAILQ_INIT(&aic->ready_list);
|
||
TAILQ_INIT(&aic->nexus_list);
|
||
TAILQ_INIT(&aic->free_list);
|
||
aic->nexus = 0;
|
||
acb = aic->acb;
|
||
bzero(acb, sizeof(aic->acb));
|
||
for (r = 0; r < sizeof(aic->acb) / sizeof(*acb); r++) {
|
||
TAILQ_INSERT_TAIL(&aic->free_list, acb, chain);
|
||
acb++;
|
||
}
|
||
bzero(&aic->tinfo, sizeof(aic->tinfo));
|
||
} else {
|
||
aic->state = AIC_CLEANING;
|
||
if (aic->nexus != NULL) {
|
||
aic->nexus->xs->error = XS_DRIVER_STUFFUP;
|
||
untimeout(aic_timeout, (caddr_t)aic->nexus);
|
||
aic_done(aic->nexus);
|
||
}
|
||
aic->nexus = NULL;
|
||
while (acb = aic->nexus_list.tqh_first) {
|
||
acb->xs->error = XS_DRIVER_STUFFUP;
|
||
untimeout(aic_timeout, (caddr_t)acb);
|
||
aic_done(acb);
|
||
}
|
||
}
|
||
|
||
aic->phase = aic->prevphase = PH_INVALID;
|
||
aic->hp = 0;
|
||
for (r = 0; r < 7; r++) {
|
||
struct aic_tinfo *tp = &aic->tinfo[r];
|
||
tp->flags = AIC_USE_SYNCHRONOUS ? DO_NEGOTIATE : 0;
|
||
tp->flags |= NEED_TO_RESET;
|
||
tp->persgst = AIC_SYNC_PERIOD;
|
||
tp->offsgst = AIC_SYNC_REQ_ACK_OFS;
|
||
tp->syncdata = 0;
|
||
}
|
||
aic->state = AIC_IDLE;
|
||
outb(DMACNTRL0, INTEN);
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* DRIVER FUNCTIONS CALLABLE FROM HIGHER LEVEL DRIVERS
|
||
*/
|
||
|
||
/*
|
||
* Expected sequence:
|
||
* 1) Command inserted into ready list
|
||
* 2) Command selected for execution
|
||
* 3) Command won arbitration and has selected target device
|
||
* 4) Send message out (identify message, eventually also sync.negotiations)
|
||
* 5) Send command
|
||
* 5a) Receive disconnect message, disconnect.
|
||
* 5b) Reselected by target
|
||
* 5c) Receive identify message from target.
|
||
* 6) Send or receive data
|
||
* 7) Receive status
|
||
* 8) Receive message (command complete etc.)
|
||
* 9) If status == SCSI_CHECK construct a synthetic request sense SCSI cmd.
|
||
* Repeat 2-8 (no disconnects please...)
|
||
*/
|
||
|
||
/*
|
||
* Start a SCSI-command
|
||
* This function is called by the higher level SCSI-driver to queue/run
|
||
* SCSI-commands.
|
||
*/
|
||
#ifdef __FreeBSD__
|
||
int32
|
||
#else
|
||
int
|
||
#endif
|
||
aic_scsi_cmd(xs)
|
||
struct scsi_xfer *xs;
|
||
{
|
||
struct scsi_link *sc = xs->sc_link;
|
||
#ifdef __FreeBSD__
|
||
int unit = sc->adapter_unit;
|
||
struct aic_data *aic = aicdata[unit];
|
||
#else
|
||
struct aic_softc *aic = sc->adapter_softc;
|
||
#endif
|
||
struct acb *acb;
|
||
int s = 0;
|
||
int flags;
|
||
u_short iobase = aic->iobase;
|
||
|
||
SC_DEBUG(sc, SDEV_DB2, ("aic_scsi_cmd\n"));
|
||
AIC_TRACE(("aic_scsi_cmd\n"));
|
||
AIC_MISC(("[0x%x, %d]->%d ", (int)xs->cmd->opcode, xs->cmdlen,
|
||
sc->target));
|
||
|
||
flags = xs->flags;
|
||
|
||
/* Get a aic command block */
|
||
if (!(flags & SCSI_NOMASK)) {
|
||
/* Critical region */
|
||
s = splbio();
|
||
acb = aic->free_list.tqh_first;
|
||
if (acb) {
|
||
TAILQ_REMOVE(&aic->free_list, acb, chain);
|
||
}
|
||
splx(s);
|
||
} else {
|
||
acb = aic->free_list.tqh_first;
|
||
if (acb) {
|
||
TAILQ_REMOVE(&aic->free_list, acb, chain);
|
||
}
|
||
}
|
||
|
||
if (acb == NULL) {
|
||
xs->error = XS_DRIVER_STUFFUP;
|
||
AIC_MISC(("TRY_AGAIN_LATER"));
|
||
return TRY_AGAIN_LATER;
|
||
}
|
||
|
||
/* Initialize acb */
|
||
acb->flags = ACB_ACTIVE;
|
||
acb->xs = xs;
|
||
bcopy(xs->cmd, &acb->cmd, xs->cmdlen);
|
||
acb->clen = xs->cmdlen;
|
||
acb->daddr = xs->data;
|
||
acb->dleft = xs->datalen;
|
||
acb->stat = 0;
|
||
|
||
if (!(flags & SCSI_NOMASK))
|
||
s = splbio();
|
||
|
||
TAILQ_INSERT_TAIL(&aic->ready_list, acb, chain);
|
||
timeout(aic_timeout, (caddr_t)acb, (xs->timeout*hz)/1000);
|
||
|
||
if (aic->state == AIC_IDLE)
|
||
aic_sched(aic);
|
||
|
||
if (!(flags & SCSI_NOMASK)) { /* Almost done. Wait outside */
|
||
splx(s);
|
||
AIC_MISC(("SUCCESSFULLY_QUEUED"));
|
||
return SUCCESSFULLY_QUEUED;
|
||
}
|
||
|
||
/* Not allowed to use interrupts, use polling instead */
|
||
#ifdef __FreeBSD__
|
||
return aic_poll(unit, acb);
|
||
#else
|
||
return aic_poll(aic, acb);
|
||
#endif
|
||
}
|
||
|
||
/*
|
||
* Adjust transfer size in buffer structure
|
||
*/
|
||
void
|
||
aic_minphys(bp)
|
||
struct buf *bp;
|
||
{
|
||
|
||
AIC_TRACE(("aic_minphys\n"));
|
||
if (bp->b_bcount > (AIC_NSEG << PGSHIFT))
|
||
bp->b_bcount = (AIC_NSEG << PGSHIFT);
|
||
}
|
||
|
||
|
||
#ifdef __FreeBSD__
|
||
u_int32
|
||
aic_adapter_info(unit)
|
||
int unit;
|
||
#else
|
||
u_int
|
||
aic_adapter_info(aic)
|
||
struct aic_softc *aic;
|
||
#endif
|
||
{
|
||
|
||
AIC_TRACE(("aic_adapter_info\n"));
|
||
return (2); /* One outstanding command per target */
|
||
}
|
||
|
||
/*
|
||
* Used when interrupt driven I/O isn't allowed, e.g. during boot.
|
||
*/
|
||
int
|
||
#ifdef __FreeBSD__
|
||
aic_poll(unit, acb)
|
||
int unit;
|
||
#else
|
||
aic_poll(aic, acb)
|
||
struct aic_softc *aic;
|
||
#endif
|
||
struct acb *acb;
|
||
{
|
||
#ifdef __FreeBSD__
|
||
struct aic_data *aic = aicdata[unit];
|
||
#endif
|
||
register u_short iobase = aic->iobase;
|
||
struct scsi_xfer *xs = acb->xs;
|
||
int count = xs->timeout * 10;
|
||
|
||
AIC_TRACE(("aic_poll\n"));
|
||
while (count) {
|
||
if (inb(DMASTAT) & INTSTAT)
|
||
#ifdef __FreeBSD__
|
||
aicintr(unit);
|
||
#else
|
||
aicintr(aic);
|
||
#endif
|
||
if (xs->flags & ITSDONE)
|
||
break;
|
||
#ifdef __FreeBSD__
|
||
DELAY(100);
|
||
#else
|
||
delay(100);
|
||
#endif
|
||
count--;
|
||
}
|
||
if (count == 0) {
|
||
AIC_MISC(("aic_poll: timeout"));
|
||
aic_timeout((caddr_t)acb);
|
||
}
|
||
if (xs->error)
|
||
return HAD_ERROR;
|
||
return COMPLETE;
|
||
}
|
||
|
||
/* LOW LEVEL SCSI UTILITIES */
|
||
|
||
/* Determine the SCSI bus phase, return either a real SCSI bus phase or some
|
||
* pseudo phase we use to detect certain exceptions. This one is a bit tricky.
|
||
* The bits we peek at:
|
||
* CDI, MSGI and DI is the 3 SCSI signals determining the bus phase.
|
||
* These should be qualified by REQI high and ACKI low.
|
||
* Also peek at SSTAT0[SELDO|SELDI] to detect a passing BUSFREE condition.
|
||
* No longer detect SCSI RESET or PERR here. They are tested for separately
|
||
* in the interrupt handler.
|
||
* Note: If an exception occur at some critical time during the phase
|
||
* determination we'll most likely return something wildly erronous....
|
||
*/
|
||
static inline u_short
|
||
aicphase(aic)
|
||
#ifdef __FreeBSD__
|
||
struct aic_data *aic;
|
||
#else
|
||
struct aic_softc *aic;
|
||
#endif
|
||
{
|
||
register u_short iobase = aic->iobase;
|
||
register u_char sstat0, sstat1, scsisig;
|
||
|
||
sstat1 = inb(SSTAT1); /* Look for REQINIT (REQ asserted) */
|
||
scsisig = inb(SCSISIGI); /* Get the SCSI bus signals */
|
||
sstat0 = inb(SSTAT0); /* Get the selection valid status bits */
|
||
|
||
if (!(inb(SSTAT0) & (SELDO|SELDI))) /* Selection became invalid? */
|
||
return PH_BUSFREE;
|
||
|
||
/* Selection is still valid */
|
||
if (!(sstat1 & REQINIT)) /* REQ not asserted ? */
|
||
return PH_INVALID;
|
||
|
||
/* REQ is asserted, (and ACK is not) */
|
||
return scsisig & PH_MASK;
|
||
}
|
||
|
||
|
||
/* Schedule a scsi operation. This has now been pulled out of the interrupt
|
||
* handler so that we may call it from aic_scsi_cmd and aic_done. This may
|
||
* save us an unecessary interrupt just to get things going. Should only be
|
||
* called when state == AIC_IDLE and at bio pl.
|
||
*/
|
||
void
|
||
aic_sched(aic)
|
||
#ifdef __FreeBSD__
|
||
register struct aic_data *aic;
|
||
#else
|
||
register struct aic_softc *aic;
|
||
#endif
|
||
{
|
||
struct scsi_xfer *xs;
|
||
struct scsi_link *sc;
|
||
struct acb *acb;
|
||
u_short iobase = aic->iobase;
|
||
int t, l;
|
||
u_char simode0, simode1, scsiseq;
|
||
|
||
AIC_TRACE(("aic_sched\n"));
|
||
simode0 = ENSELDI;
|
||
simode1 = ENSCSIRST|ENSCSIPERR|ENREQINIT;
|
||
scsiseq = ENRESELI;
|
||
/*
|
||
* Find first acb in rdy queue that is for a target/lunit
|
||
* combinations that is not busy.
|
||
*/
|
||
outb(CLRSINT1, CLRSELTIMO|CLRBUSFREE|CLRSCSIPERR);
|
||
for (acb = aic->ready_list.tqh_first; acb; acb = acb->chain.tqe_next) {
|
||
sc = acb->xs->sc_link;
|
||
t = sc->target;
|
||
if (!(aic->tinfo[t].lubusy & (1 << sc->lun))) {
|
||
TAILQ_REMOVE(&aic->ready_list, acb, chain);
|
||
aic->nexus = acb;
|
||
aic->state = AIC_SELECTING;
|
||
/*
|
||
* Start selection process. Always enable
|
||
* reselections. Note: we don't have a nexus yet, so
|
||
* cannot set aic->state = AIC_HASNEXUS.
|
||
*/
|
||
simode0 = ENSELDI|ENSELDO;
|
||
simode1 = ENSCSIRST|ENSCSIPERR|
|
||
ENREQINIT|ENSELTIMO;
|
||
scsiseq = ENRESELI|ENSELO|ENAUTOATNO;
|
||
outb(SCSIID, AIC_SCSI_HOSTID << OID_S | t);
|
||
outb(SXFRCTL1, STIMO_256ms|ENSTIMER);
|
||
outb(CLRSINT0, CLRSELDO);
|
||
break;
|
||
}
|
||
#if AIC_DEBUG
|
||
else
|
||
AIC_MISC(("%d:%d busy\n", t, sc->lun));
|
||
#endif
|
||
}
|
||
AIC_MISC(("%sselecting\n",scsiseq&ENSELO?"":"re"));
|
||
outb(SIMODE0, simode0);
|
||
outb(SIMODE1, simode1);
|
||
outb(SCSISEQ, scsiseq);
|
||
}
|
||
|
||
|
||
/*
|
||
* POST PROCESSING OF SCSI_CMD (usually current)
|
||
*/
|
||
void
|
||
aic_done(acb)
|
||
struct acb *acb;
|
||
{
|
||
struct scsi_xfer *xs = acb->xs;
|
||
struct scsi_link *sc = xs->sc_link;
|
||
#ifdef __FreeBSD__
|
||
int unit = sc->adapter_unit;
|
||
struct aic_data *aic = aicdata[unit];
|
||
#else
|
||
struct aic_softc *aic = sc->adapter_softc;
|
||
#endif
|
||
u_short iobase = aic->iobase;
|
||
struct acb *acb2;
|
||
|
||
AIC_TRACE(("aic_done "));
|
||
|
||
/*
|
||
* Now, if we've come here with no error code, i.e. we've kept the
|
||
* initial XS_NOERROR, and the status code signals that we should
|
||
* check sense, we'll need to set up a request sense cmd block and
|
||
* push the command back into the ready queue *before* any other
|
||
* commands for this target/lunit, else we lose the sense info.
|
||
* We don't support chk sense conditions for the request sense cmd.
|
||
*/
|
||
if (xs->error == XS_NOERROR && !(acb->flags & ACB_CHKSENSE)) {
|
||
if ((acb->stat & ST_MASK)==SCSI_CHECK) {
|
||
struct scsi_sense *ss = (void *)&acb->cmd;
|
||
AIC_MISC(("requesting sense "));
|
||
/* First, save the return values */
|
||
xs->resid = acb->dleft;
|
||
xs->status = acb->stat;
|
||
/* Next, setup a request sense command block */
|
||
bzero(ss, sizeof(*ss));
|
||
ss->op_code = REQUEST_SENSE;
|
||
ss->byte2 = sc->lun << 5;
|
||
ss->length = sizeof(struct scsi_sense_data);
|
||
acb->clen = sizeof(*ss);
|
||
acb->daddr = (char *)&xs->sense;
|
||
acb->dleft = sizeof(struct scsi_sense_data);
|
||
acb->flags = ACB_ACTIVE|ACB_CHKSENSE;
|
||
TAILQ_INSERT_HEAD(&aic->ready_list, acb, chain);
|
||
aic->tinfo[sc->target].lubusy &= ~(1<<sc->lun);
|
||
aic->tinfo[sc->target].senses++;
|
||
if (aic->nexus == acb) {
|
||
aic->nexus = NULL;
|
||
aic->state = AIC_IDLE;
|
||
aic_sched(aic);
|
||
}
|
||
return;
|
||
}
|
||
}
|
||
|
||
if (xs->flags & SCSI_ERR_OK) {
|
||
xs->resid = 0;
|
||
xs->error = XS_NOERROR;
|
||
} else if (xs->error == XS_NOERROR && (acb->flags & ACB_CHKSENSE)) {
|
||
xs->error = XS_SENSE;
|
||
} else {
|
||
xs->resid = acb->dleft;
|
||
}
|
||
xs->flags |= ITSDONE;
|
||
|
||
#if AIC_DEBUG
|
||
if (aic_debug & AIC_SHOWMISC) {
|
||
printf("err=0x%02x ",xs->error);
|
||
if (xs->error == XS_SENSE)
|
||
printf("sense=%2x\n", xs->sense.error_code);
|
||
}
|
||
if ((xs->resid || xs->error > XS_SENSE) && aic_debug & AIC_SHOWMISC) {
|
||
if (xs->resid)
|
||
printf("aic_done: resid=%d\n", xs->resid);
|
||
if (xs->error)
|
||
printf("aic_done: error=%d\n", xs->error);
|
||
}
|
||
#endif
|
||
|
||
/*
|
||
* Remove the ACB from whatever queue it's on. We have to do a bit of
|
||
* a hack to figure out which queue it's on. Note that it is *not*
|
||
* necessary to cdr down the ready queue, but we must cdr down the
|
||
* nexus queue and see if it's there, so we can mark the unit as no
|
||
* longer busy. This code is sickening, but it works.
|
||
*/
|
||
if (acb == aic->nexus) {
|
||
aic->state = AIC_IDLE;
|
||
aic->tinfo[sc->target].lubusy &= ~(1<<sc->lun);
|
||
aic_sched(aic);
|
||
} else if (aic->ready_list.tqh_last == &acb->chain.tqe_next) {
|
||
TAILQ_REMOVE(&aic->ready_list, acb, chain);
|
||
} else {
|
||
register struct acb *acb2;
|
||
for (acb2 = aic->nexus_list.tqh_first; acb2;
|
||
acb2 = acb2->chain.tqe_next)
|
||
if (acb2 == acb) {
|
||
TAILQ_REMOVE(&aic->nexus_list, acb, chain);
|
||
aic->tinfo[sc->target].lubusy &= ~(1<<sc->lun);
|
||
/* XXXX Should we call aic_sched() here? */
|
||
break;
|
||
}
|
||
if (acb2)
|
||
;
|
||
else if (acb->chain.tqe_next) {
|
||
TAILQ_REMOVE(&aic->ready_list, acb, chain);
|
||
} else {
|
||
#ifdef __FreeBSD__
|
||
printf("aic%d: can't find matching acb\n", unit);
|
||
#else
|
||
printf("%s: can't find matching acb\n",
|
||
aic->sc_dev.dv_xname);
|
||
#endif
|
||
Debugger("aic6360");
|
||
fatal_if_no_DDB();
|
||
}
|
||
}
|
||
/* Put it on the free list. */
|
||
acb->flags = ACB_FREE;
|
||
TAILQ_INSERT_HEAD(&aic->free_list, acb, chain);
|
||
|
||
aic->tinfo[sc->target].cmds++;
|
||
scsi_done(xs);
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* INTERRUPT/PROTOCOL ENGINE
|
||
*/
|
||
|
||
/* The message system:
|
||
* This is a revamped message system that now should easier accomodate new
|
||
* messages, if necessary.
|
||
* Currently we accept these messages:
|
||
* IDENTIFY (when reselecting)
|
||
* COMMAND COMPLETE # (expect bus free after messages marked #)
|
||
* NOOP
|
||
* MESSAGE REJECT
|
||
* SYNCHRONOUS DATA TRANSFER REQUEST
|
||
* SAVE DATA POINTER
|
||
* RESTORE POINTERS
|
||
* DISCONNECT #
|
||
*
|
||
* We may send these messages in prioritized order:
|
||
* BUS DEVICE RESET # if SCSI_RESET & xs->flags (or in weird sits.)
|
||
* MESSAGE PARITY ERROR par. err. during MSGI
|
||
* MESSAGE REJECT If we get a message we don't know how to handle
|
||
* ABORT # send on errors
|
||
* INITIATOR DETECTED ERROR also on errors (SCSI2) (during info xfer)
|
||
* IDENTIFY At the start of each transfer
|
||
* SYNCHRONOUS DATA TRANSFER REQUEST if appropriate
|
||
* NOOP if nothing else fits the bill ...
|
||
*/
|
||
|
||
#define aic_sched_msgout(m) \
|
||
do { \
|
||
orreg(SCSISIGO, ATNO); \
|
||
aic->msgpriq |= (m); \
|
||
} while (0)
|
||
|
||
#define IS1BYTEMSG(m) (((m) != 1 && (m) < 0x20) || (m) >= 0x80)
|
||
#define IS2BYTEMSG(m) (((m) & 0xf0) == 0x20)
|
||
#define ISEXTMSG(m) ((m) == 1)
|
||
/* Precondition:
|
||
* The SCSI bus is already in the MSGI phase and there is a message byte
|
||
* on the bus, along with an asserted REQ signal.
|
||
*/
|
||
static void
|
||
aic_msgin(aic)
|
||
#ifdef __FreeBSD__
|
||
register struct aic_data *aic;
|
||
#else
|
||
register struct aic_softc *aic;
|
||
#endif
|
||
{
|
||
register u_short iobase = aic->iobase;
|
||
int spincount, extlen;
|
||
u_char sstat1;
|
||
|
||
AIC_TRACE(("aic_msgin "));
|
||
outb(SCSISIGO, PH_MSGI);
|
||
/* Prepare for a new message. A message should (according to the SCSI
|
||
* standard) be transmitted in one single message_in phase.
|
||
* If we have been in some other phase, then this is a new message.
|
||
*/
|
||
if (aic->prevphase != PH_MSGI) {
|
||
aic->flags &= ~AIC_DROP_MSGI;
|
||
aic->imlen = 0;
|
||
}
|
||
/*
|
||
* Read a whole message but the last byte. If we shall reject the
|
||
* message, we shall have to do it, by asserting ATNO, during the
|
||
* message transfer phase itself.
|
||
*/
|
||
for (;;) {
|
||
sstat1 = inb(SSTAT1);
|
||
/* If parity errors just dump everything on the floor, also
|
||
* a parity error automatically sets ATNO
|
||
*/
|
||
if (sstat1 & SCSIPERR) {
|
||
aic_sched_msgout(SEND_PARITY_ERROR);
|
||
aic->flags |= AIC_DROP_MSGI;
|
||
}
|
||
/*
|
||
* If we're going to reject the message, don't bother storing
|
||
* the incoming bytes. But still, we need to ACK them.
|
||
*/
|
||
if (!(aic->flags & AIC_DROP_MSGI)) {
|
||
/* Get next message byte */
|
||
aic->imess[aic->imlen] = inb(SCSIDAT);
|
||
/*
|
||
* This testing is suboptimal, but most messages will
|
||
* be of the one byte variety, so it should not effect
|
||
* performance significantly.
|
||
*/
|
||
if (IS1BYTEMSG(aic->imess[0]))
|
||
break;
|
||
if (IS2BYTEMSG(aic->imess[0]) && aic->imlen == 1)
|
||
break;
|
||
if (ISEXTMSG(aic->imess[0]) && aic->imlen > 0) {
|
||
if (aic->imlen == AIC_MAX_MSG_LEN) {
|
||
aic->flags |= AIC_DROP_MSGI;
|
||
aic_sched_msgout(SEND_REJECT);
|
||
}
|
||
extlen = aic->imess[1] ? aic->imess[1] : 256;
|
||
if (aic->imlen == extlen + 2)
|
||
break; /* Got it all */
|
||
}
|
||
}
|
||
/* If we reach this spot we're either:
|
||
* a) in the middle of a multi-byte message or
|
||
* b) we're dropping bytes
|
||
*/
|
||
outb(SXFRCTL0, CHEN|SPIOEN);
|
||
inb(SCSIDAT); /* Really read it (ACK it, that is) */
|
||
outb(SXFRCTL0, CHEN);
|
||
aic->imlen++;
|
||
|
||
/*
|
||
* We expect the bytes in a multibyte message to arrive
|
||
* relatively close in time, a few microseconds apart.
|
||
* Therefore we will spinwait for some small amount of time
|
||
* waiting for the next byte.
|
||
*/
|
||
#ifdef __FreeBSD__
|
||
spincount = DELAYCOUNT * AIC_MSGI_SPIN;
|
||
#else
|
||
spincount = MINIFUDGE(delaycount) * AIC_MSGI_SPIN;
|
||
#endif
|
||
LOGLINE(aic);
|
||
while (spincount-- && !((sstat1 = inb(SSTAT1)) & REQINIT))
|
||
;
|
||
if (spincount == -1 || sstat1 & (PHASEMIS|BUSFREE))
|
||
return;
|
||
}
|
||
/* Now we should have a complete message (1 byte, 2 byte and moderately
|
||
* long extended messages). We only handle extended messages which
|
||
* total length is shorter than AIC_MAX_MSG_LEN. Longer messages will
|
||
* be amputated. (Return XS_BOBBITT ?)
|
||
*/
|
||
if (aic->state == AIC_HASNEXUS) {
|
||
struct acb *acb = aic->nexus;
|
||
struct aic_tinfo *ti = &aic->tinfo[acb->xs->sc_link->target];
|
||
int offs, per, rate;
|
||
|
||
outb(SIMODE1, ENSCSIRST|ENPHASEMIS|ENBUSFREE|ENSCSIPERR);
|
||
switch (aic->imess[0]) {
|
||
case MSG_CMDCOMPLETE:
|
||
if (!acb) {
|
||
aic_sched_msgout(SEND_ABORT);
|
||
printf("aic: CMDCOMPLETE but no command?\n");
|
||
break;
|
||
}
|
||
if (aic->dleft < 0) {
|
||
struct scsi_link *sc = acb->xs->sc_link;
|
||
printf("aic: %d extra bytes from %d:%d\n",
|
||
-aic->dleft, sc->target, sc->lun);
|
||
acb->dleft = 0;
|
||
}
|
||
acb->xs->resid = acb->dleft = aic->dleft;
|
||
aic->flags |= AIC_BUSFREE_OK;
|
||
untimeout(aic_timeout, (caddr_t)acb);
|
||
aic_done(acb);
|
||
break;
|
||
case MSG_MESSAGE_REJECT:
|
||
if (aic_debug & AIC_SHOWMISC)
|
||
printf("aic: our msg rejected by target\n");
|
||
if (aic->flags & AIC_SYNCHNEGO) {
|
||
ti->syncdata = 0;
|
||
ti->persgst = ti->offsgst = 0;
|
||
aic->flags &= ~AIC_SYNCHNEGO;
|
||
ti->flags &= ~DO_NEGOTIATE;
|
||
}
|
||
/* Not all targets understand INITIATOR_DETECTED_ERR */
|
||
if (aic->msgout == SEND_INIT_DET_ERR)
|
||
aic_sched_msgout(SEND_ABORT);
|
||
break;
|
||
case MSG_NOOP: /* Will do! Immediately, sir!*/
|
||
break; /* Hah, that was easy! */
|
||
case MSG_DISCONNECT:
|
||
if (!acb) {
|
||
aic_sched_msgout(SEND_ABORT);
|
||
printf("aic: nothing to DISCONNECT\n");
|
||
break;
|
||
}
|
||
ti->dconns++;
|
||
TAILQ_INSERT_HEAD(&aic->nexus_list, acb, chain);
|
||
acb = aic->nexus = NULL;
|
||
aic->state = AIC_IDLE;
|
||
aic->flags |= AIC_BUSFREE_OK;
|
||
break;
|
||
case MSG_SAVEDATAPOINTER:
|
||
if (!acb) {
|
||
aic_sched_msgout(SEND_ABORT);
|
||
printf("aic: no DATAPOINTERs to save\n");
|
||
break;
|
||
}
|
||
acb->dleft = aic->dleft;
|
||
acb->daddr = aic->dp;
|
||
break;
|
||
case MSG_RESTOREPOINTERS:
|
||
if (!acb) {
|
||
aic_sched_msgout(SEND_ABORT);
|
||
printf("aic: no DATAPOINTERs to restore\n");
|
||
break;
|
||
}
|
||
aic->dp = acb->daddr;
|
||
aic->dleft = acb->dleft;
|
||
break;
|
||
case MSG_EXTENDED:
|
||
switch (aic->imess[2]) {
|
||
case MSG_EXT_SDTR:
|
||
per = aic->imess[3] * 4;
|
||
rate = (per + 49 - 100)/50;
|
||
offs = aic->imess[4];
|
||
if (offs == 0)
|
||
ti->syncdata = 0;
|
||
else if (rate > 7) {
|
||
/* Too slow for aic6360. Do asynch
|
||
* instead. Renegotiate the deal.
|
||
*/
|
||
ti->persgst = 0;
|
||
ti->offsgst = 0;
|
||
aic_sched_msgout(SEND_SDTR);
|
||
} else {
|
||
rate = rate<<4 | offs;
|
||
ti->syncdata = rate;
|
||
}
|
||
break;
|
||
default: /* Extended messages we don't handle */
|
||
aic_sched_msgout(SEND_REJECT);
|
||
break;
|
||
}
|
||
break;
|
||
default:
|
||
aic_sched_msgout(SEND_REJECT);
|
||
break;
|
||
}
|
||
} else if (aic->state == AIC_RESELECTED) {
|
||
struct scsi_link *sc;
|
||
struct acb *acb;
|
||
u_char selid, lunit;
|
||
/*
|
||
* Which target is reselecting us? (The ID bit really)
|
||
*/
|
||
selid = inb(SELID) & ~(1<<AIC_SCSI_HOSTID);
|
||
if (MSG_ISIDENT(aic->imess[0])) { /* Identify? */
|
||
AIC_MISC(("searching "));
|
||
/* Search wait queue for disconnected cmd
|
||
* The list should be short, so I haven't bothered with
|
||
* any more sophisticated structures than a simple
|
||
* singly linked list.
|
||
*/
|
||
lunit = aic->imess[0] & 0x07;
|
||
for (acb = aic->nexus_list.tqh_first; acb;
|
||
acb = acb->chain.tqe_next) {
|
||
sc = acb->xs->sc_link;
|
||
if (sc->lun == lunit &&
|
||
selid == (1<<sc->target)) {
|
||
TAILQ_REMOVE(&aic->nexus_list, acb,
|
||
chain);
|
||
break;
|
||
}
|
||
}
|
||
if (!acb) { /* Invalid reselection! */
|
||
aic_sched_msgout(SEND_ABORT);
|
||
printf("aic: invalid reselect (idbit=0x%2x)\n",
|
||
selid);
|
||
} else { /* Reestablish nexus */
|
||
/* Setup driver data structures and
|
||
* do an implicit RESTORE POINTERS
|
||
*/
|
||
aic->nexus = acb;
|
||
aic->dp = acb->daddr;
|
||
aic->dleft = acb->dleft;
|
||
aic->tinfo[sc->target].lubusy |= (1<<sc->lun);
|
||
outb(SCSIRATE,aic->tinfo[sc->target].syncdata);
|
||
AIC_MISC(("... found acb"));
|
||
aic->state = AIC_HASNEXUS;
|
||
}
|
||
} else {
|
||
printf("aic: bogus reselect (no IDENTIFY) %0x2x\n",
|
||
selid);
|
||
aic_sched_msgout(SEND_DEV_RESET);
|
||
}
|
||
} else { /* Neither AIC_HASNEXUS nor AIC_RESELECTED! */
|
||
printf("aic: unexpected message in; will send DEV_RESET\n");
|
||
aic_sched_msgout(SEND_DEV_RESET);
|
||
}
|
||
/* Must not forget to ACK the last message byte ... */
|
||
outb(SXFRCTL0, CHEN|SPIOEN);
|
||
inb(SCSIDAT);
|
||
outb(SXFRCTL0, CHEN);
|
||
outb(SIMODE1, ENSCSIRST|ENBUSFREE|ENSCSIPERR|ENREQINIT);
|
||
}
|
||
|
||
|
||
/* The message out (and in) stuff is a bit complicated:
|
||
* If the target requests another message (sequence) without
|
||
* having changed phase in between it really asks for a
|
||
* retransmit, probably due to parity error(s).
|
||
* The following messages can be sent:
|
||
* IDENTIFY @ These 3 stems from scsi command activity
|
||
* BUS_DEV_RESET @
|
||
* IDENTIFY + SDTR @
|
||
* MESSAGE_REJECT if MSGI doesn't make sense
|
||
* MESSAGE_PARITY_ERROR if MSGI spots a parity error
|
||
* NOOP if asked for a message and there's nothing to send
|
||
*/
|
||
static void
|
||
aic_msgout(aic)
|
||
#ifdef __FreeBSD__
|
||
register struct aic_data *aic;
|
||
#else
|
||
register struct aic_softc *aic;
|
||
#endif
|
||
{
|
||
register u_short iobase = aic->iobase;
|
||
struct aic_tinfo *ti;
|
||
struct acb *acb;
|
||
u_char dmastat, scsisig;
|
||
|
||
/* First determine what to send. If we haven't seen a
|
||
* phasechange this is a retransmission request.
|
||
*/
|
||
outb(SCSISIGO, PH_MSGO);
|
||
if (aic->prevphase != PH_MSGO) { /* NOT a retransmit */
|
||
/* Pick up highest priority message */
|
||
aic->msgout = aic->msgpriq & -aic->msgpriq; /* What message? */
|
||
aic->omlen = 1; /* "Default" message len */
|
||
switch (aic->msgout) {
|
||
case SEND_SDTR: /* Also implies an IDENTIFY message */
|
||
acb = aic->nexus;
|
||
ti = &aic->tinfo[acb->xs->sc_link->target];
|
||
aic->omess[1] = MSG_EXTENDED;
|
||
aic->omess[2] = 3;
|
||
aic->omess[3] = MSG_EXT_SDTR;
|
||
aic->omess[4] = ti->persgst >> 2;
|
||
aic->omess[5] = ti->offsgst;
|
||
aic->omlen = 6;
|
||
/* Fallthrough! */
|
||
case SEND_IDENTIFY:
|
||
if (aic->state != AIC_HASNEXUS) {
|
||
printf("aic at line %d: no nexus", __LINE__);
|
||
Debugger("aic6360");
|
||
fatal_if_no_DDB();
|
||
}
|
||
acb = aic->nexus;
|
||
aic->omess[0] = MSG_IDENTIFY(acb->xs->sc_link->lun);
|
||
break;
|
||
case SEND_DEV_RESET:
|
||
aic->omess[0] = MSG_BUS_DEV_RESET;
|
||
aic->flags |= AIC_BUSFREE_OK;
|
||
break;
|
||
case SEND_PARITY_ERROR:
|
||
aic->omess[0] = MSG_PARITY_ERR;
|
||
break;
|
||
case SEND_ABORT:
|
||
aic->omess[0] = MSG_ABORT;
|
||
aic->flags |= AIC_BUSFREE_OK;
|
||
break;
|
||
case SEND_INIT_DET_ERR:
|
||
aic->omess[0] = MSG_INITIATOR_DET_ERR;
|
||
break;
|
||
case SEND_REJECT:
|
||
aic->omess[0] = MSG_MESSAGE_REJECT;
|
||
break;
|
||
default:
|
||
aic->omess[0] = MSG_NOOP;
|
||
break;
|
||
}
|
||
aic->omp = aic->omess;
|
||
} else if (aic->omp == &aic->omess[aic->omlen]) {
|
||
/* Have sent the message at least once, this is a retransmit.
|
||
*/
|
||
AIC_MISC(("retransmitting "));
|
||
if (aic->omlen > 1)
|
||
outb(SCSISIGO, PH_MSGO|ATNO);
|
||
}
|
||
/* else, we're in the middle of a multi-byte message */
|
||
outb(SXFRCTL0, CHEN|SPIOEN);
|
||
outb(DMACNTRL0, INTEN|RSTFIFO);
|
||
outb(SIMODE1, ENSCSIRST|ENBUSFREE|ENSCSIPERR|ENREQINIT);
|
||
do {
|
||
LOGLINE(aic);
|
||
do {
|
||
aic->phase = aicphase(aic);
|
||
} while (aic->phase == PH_INVALID);
|
||
if (aic->phase != PH_MSGO)
|
||
/* Target left MSGO, possibly to reject our
|
||
* message
|
||
*/
|
||
break;
|
||
/* Clear ATN before last byte */
|
||
if (aic->omp == &aic->omess[aic->omlen-1])
|
||
outb(CLRSINT1, CLRATNO);
|
||
outb(SCSIDAT, *aic->omp++); /* Send MSG */
|
||
LOGLINE(aic);
|
||
while (inb(SCSISIGI) & ACKO)
|
||
;
|
||
} while (aic->omp != &aic->omess[aic->omlen]);
|
||
aic->progress = aic->omp != aic->omess;
|
||
/* We get here in two ways:
|
||
* a) phase != MSGO. Target is probably going to reject our message
|
||
* b) aic->omp == &aic->omess[aic->omlen], i.e. the message has been
|
||
* transmitted correctly and accepted by the target.
|
||
*/
|
||
if (aic->phase == PH_MSGO) { /* Message accepted by target! */
|
||
aic->msgpriq &= ~aic->msgout;
|
||
aic->msgout = 0;
|
||
}
|
||
outb(SXFRCTL0, CHEN); /* Disable SPIO */
|
||
outb(SIMODE0, 0); /* Setup interrupts before leaving */
|
||
outb(SIMODE1, ENSCSIRST|ENBUSFREE|ENSCSIPERR|ENREQINIT);
|
||
/* Enabled ints: SCSIPERR, SCSIRSTI (unexpected)
|
||
* REQINIT (expected) BUSFREE (possibly expected)
|
||
*/
|
||
}
|
||
|
||
/* aic_dataout: perform a data transfer using the FIFO datapath in the aic6360
|
||
* Precondition: The SCSI bus should be in the DOUT phase, with REQ asserted
|
||
* and ACK deasserted (i.e. waiting for a data byte)
|
||
* This new revision has been optimized (I tried) to make the common case fast,
|
||
* and the rarer cases (as a result) somewhat more comlex
|
||
*/
|
||
void
|
||
aic_dataout(aic)
|
||
register struct aic_data *aic;
|
||
{
|
||
register u_short iobase = aic->iobase;
|
||
register u_char dmastat;
|
||
struct acb *acb = aic->nexus;
|
||
int amount, olddleft = aic->dleft;
|
||
#define DOUTAMOUNT 128 /* Full FIFO */
|
||
|
||
/* Enable DATA OUT transfers */
|
||
outb(SCSISIGO, PH_DOUT);
|
||
outb(CLRSINT1, CLRPHASECHG);
|
||
/* Clear FIFOs and counters */
|
||
outb(SXFRCTL0, CHEN|CLRSTCNT|CLRCH);
|
||
outb(DMACNTRL0, WRITE|INTEN|RSTFIFO);
|
||
/* Enable FIFOs */
|
||
outb(SXFRCTL0, SCSIEN|DMAEN|CHEN);
|
||
outb(DMACNTRL0, ENDMA|DWORDPIO|WRITE|INTEN);
|
||
|
||
/* Setup to detect:
|
||
* PHASEMIS & PHASECHG: target has left the DOUT phase
|
||
* SCSIRST: something just pulled the RST line.
|
||
* BUSFREE: target has unexpectedly left the DOUT phase
|
||
*/
|
||
outb(SIMODE1, ENPHASEMIS|ENSCSIRST|ENBUSFREE|ENPHASECHG);
|
||
|
||
/* I have tried to make the main loop as tight as possible. This
|
||
* means that some of the code following the loop is a bit more
|
||
* complex than otherwise.
|
||
*/
|
||
while (aic->dleft) {
|
||
int xfer;
|
||
|
||
LOGLINE(aic);
|
||
|
||
for (;;) {
|
||
dmastat = inb(DMASTAT);
|
||
if (dmastat & DFIFOEMP)
|
||
break;
|
||
if (dmastat & INTSTAT)
|
||
goto phasechange;
|
||
}
|
||
|
||
xfer = min(DOUTAMOUNT, aic->dleft);
|
||
|
||
#if AIC_USE_DWORDS
|
||
if (xfer >= 12) {
|
||
outsl(DMADATALONG, aic->dp, xfer/4);
|
||
aic->dleft -= xfer & ~3;
|
||
aic->dp += xfer & ~3;
|
||
xfer &= 3;
|
||
}
|
||
#else
|
||
if (xfer >= 8) {
|
||
outsw(DMADATA, aic->dp, xfer/2);
|
||
aic->dleft -= xfer & ~1;
|
||
aic->dp += xfer & ~1;
|
||
xfer &= 1;
|
||
}
|
||
#endif
|
||
|
||
if (xfer) {
|
||
outb(DMACNTRL0, ENDMA|B8MODE|INTEN);
|
||
outsb(DMADATA, aic->dp, xfer);
|
||
aic->dleft -= xfer;
|
||
aic->dp += xfer;
|
||
outb(DMACNTRL0, ENDMA|DWORDPIO|INTEN);
|
||
}
|
||
}
|
||
|
||
/* See the bytes off chip */
|
||
for (;;) {
|
||
dmastat = inb(DMASTAT);
|
||
if ((dmastat & DFIFOEMP) && (inb(SSTAT2) & SEMPTY))
|
||
break;
|
||
if (dmastat & INTSTAT)
|
||
goto phasechange;
|
||
}
|
||
|
||
phasechange:
|
||
/* We now have the data off chip. */
|
||
outb(SXFRCTL0, CHEN);
|
||
|
||
if (dmastat & INTSTAT) { /* Some sort of phasechange */
|
||
register u_char sstat2;
|
||
/* Stop transfers, do some accounting */
|
||
amount = inb(FIFOSTAT);
|
||
sstat2 = inb(SSTAT2);
|
||
if ((sstat2 & 7) == 0)
|
||
amount += sstat2 & SFULL ? 8 : 0;
|
||
else
|
||
amount += sstat2 & 7;
|
||
aic->dleft += amount;
|
||
aic->dp -= amount;
|
||
AIC_MISC(("+%d ", amount));
|
||
}
|
||
|
||
outb(DMACNTRL0, RSTFIFO|INTEN);
|
||
LOGLINE(aic);
|
||
while (inb(SXFRCTL0) & SCSIEN)
|
||
;
|
||
outb(SIMODE1, ENSCSIRST|ENBUSFREE|ENSCSIPERR|ENREQINIT);
|
||
/* Enabled ints: BUSFREE, SCSIPERR, SCSIRSTI (unexpected)
|
||
* REQINIT (expected)
|
||
*/
|
||
aic->progress = olddleft != aic->dleft;
|
||
return;
|
||
}
|
||
|
||
/* aic_datain: perform data transfers using the FIFO datapath in the aic6360
|
||
* Precondition: The SCSI bus should be in the DIN phase, with REQ asserted
|
||
* and ACK deasserted (i.e. at least one byte is ready).
|
||
* For now, uses a pretty dumb algorithm, hangs around until all data has been
|
||
* transferred. This, is OK for fast targets, but not so smart for slow
|
||
* targets which don't disconnect or for huge transfers.
|
||
*/
|
||
void
|
||
aic_datain(aic)
|
||
#ifdef __FreeBSD__
|
||
register struct aic_data *aic;
|
||
#else
|
||
register struct aic_softc *aic;
|
||
#endif
|
||
{
|
||
register u_short iobase = aic->iobase;
|
||
register u_char dmastat;
|
||
struct acb *acb = aic->nexus;
|
||
int amount, olddleft = aic->dleft;
|
||
#define DINAMOUNT 128 /* Default amount of data to transfer */
|
||
|
||
/* Enable DATA IN transfers */
|
||
outb(SCSISIGO, PH_DIN);
|
||
outb(CLRSINT1, CLRPHASECHG);
|
||
/* Clear FIFOs and counters */
|
||
outb(SXFRCTL0, CHEN|CLRSTCNT|CLRCH);
|
||
outb(DMACNTRL0, INTEN|RSTFIFO);
|
||
/* Enable FIFOs */
|
||
outb(SXFRCTL0, SCSIEN|DMAEN|CHEN);
|
||
outb(DMACNTRL0, ENDMA|DWORDPIO|INTEN);
|
||
|
||
outb(SIMODE1, ENSCSIRST|ENPHASEMIS|ENBUSFREE|ENPHASECHG);
|
||
|
||
/* We leave this loop if one or more of the following is true:
|
||
* a) phase != PH_DIN && FIFOs are empty
|
||
* b) SCSIRSTI is set (a reset has occurred) or busfree is detected.
|
||
*/
|
||
while (aic->dleft) {
|
||
int done = 0;
|
||
int xfer;
|
||
|
||
LOGLINE(aic);
|
||
|
||
/* Wait for fifo half full or phase mismatch */
|
||
for (;;) {
|
||
dmastat = inb(DMASTAT);
|
||
if (dmastat & (DFIFOFULL|INTSTAT))
|
||
break;
|
||
}
|
||
|
||
if (dmastat & DFIFOFULL)
|
||
xfer = DINAMOUNT;
|
||
else {
|
||
while ((inb(SSTAT2) & SEMPTY) == 0)
|
||
;
|
||
xfer = inb(FIFOSTAT);
|
||
done = 1;
|
||
}
|
||
|
||
xfer = min(xfer, aic->dleft);
|
||
|
||
#if AIC_USE_DWORDS
|
||
if (xfer >= 12) {
|
||
insl(DMADATALONG, aic->dp, xfer/4);
|
||
aic->dleft -= xfer & ~3;
|
||
aic->dp += xfer & ~3;
|
||
xfer &= 3;
|
||
}
|
||
#else
|
||
if (xfer >= 8) {
|
||
insw(DMADATA, aic->dp, xfer/2);
|
||
aic->dleft -= xfer & ~1;
|
||
aic->dp += xfer & ~1;
|
||
xfer &= 1;
|
||
}
|
||
#endif
|
||
|
||
if (xfer) {
|
||
outb(DMACNTRL0, ENDMA|B8MODE|INTEN);
|
||
insb(DMADATA, aic->dp, xfer);
|
||
aic->dleft -= xfer;
|
||
aic->dp += xfer;
|
||
outb(DMACNTRL0, ENDMA|DWORDPIO|INTEN);
|
||
}
|
||
|
||
if (done)
|
||
break;
|
||
}
|
||
|
||
#if 0
|
||
if (aic->dleft)
|
||
printf("residual of %d\n", aic->dleft);
|
||
#endif
|
||
|
||
aic->progress = olddleft != aic->dleft;
|
||
/* Some SCSI-devices are rude enough to transfer more data than what
|
||
* was requested, e.g. 2048 bytes from a CD-ROM instead of the
|
||
* requested 512. Test for progress, i.e. real transfers. If no real
|
||
* transfers have been performed (acb->dleft is probably already zero)
|
||
* and the FIFO is not empty, waste some bytes....
|
||
*/
|
||
if (!aic->progress) {
|
||
int extra = 0;
|
||
LOGLINE(aic);
|
||
|
||
for (;;) {
|
||
dmastat = inb(DMASTAT);
|
||
if (dmastat & DFIFOEMP)
|
||
break;
|
||
(void) inb(DMADATA); /* Throw it away */
|
||
extra++;
|
||
}
|
||
|
||
AIC_MISC(("aic: %d extra bytes from %d:%d\n", extra,
|
||
acb->xs->sc_link->target, acb->xs->sc_link->lun));
|
||
aic->progress = extra;
|
||
}
|
||
|
||
/* Stop the FIFO data path */
|
||
outb(SXFRCTL0, CHEN);
|
||
|
||
outb(DMACNTRL0, RSTFIFO|INTEN);
|
||
/* Come back when REQ is set again */
|
||
outb(SIMODE1, ENSCSIRST|ENBUSFREE|ENSCSIPERR|ENREQINIT);
|
||
LOGLINE(aic);
|
||
}
|
||
|
||
|
||
/*
|
||
* This is the workhorse routine of the driver.
|
||
* Deficiencies (for now):
|
||
* 1) always uses programmed I/O
|
||
* 2) doesn't support synchronous transfers properly (yet)
|
||
*/
|
||
|
||
#ifdef __FreeBSD__
|
||
void
|
||
aicintr(int unit)
|
||
#else
|
||
#error /* the ifdefs for returning unused values were too much trouble */
|
||
int
|
||
aicintr(aic)
|
||
register struct aic_softc *aic;
|
||
#endif
|
||
{
|
||
#ifdef __FreeBSD__
|
||
struct aic_data *aic = aicdata[unit];
|
||
#else
|
||
struct scsi_xfer *xs;
|
||
#endif
|
||
register struct acb *acb;
|
||
register struct scsi_link *sc;
|
||
register u_short iobase = aic->iobase;
|
||
struct aic_tinfo *ti;
|
||
int done, amount;
|
||
u_char sstat0, sstat1, scsisig, dmastat, sstat2;
|
||
u_char scsiseq, simode0, simode1, sxfrctl0;
|
||
|
||
|
||
LOGLINE(aic);
|
||
/* Clear INTEN. This is important if we're running with edge
|
||
* triggered interrupts as we don't guarantee that all interrupts will
|
||
* be served during one single invocation of this routine, i.e. we may
|
||
* need another edge.
|
||
*/
|
||
outb(DMACNTRL0, 0);
|
||
AIC_TRACE(("aicintr\n"));
|
||
|
||
/*
|
||
* 1st check for abnormal conditions, such as reset or parity errors
|
||
*/
|
||
sstat1 = inb(SSTAT1);
|
||
AIC_MISC(("s1:0x%02x ", sstat1));
|
||
if (sstat1 & (SCSIRSTI|SCSIPERR)) {
|
||
if (sstat1 & SCSIRSTI) {
|
||
printf("aic: reset in -- reinitializing....\n");
|
||
aic_init(aic); /* Restart everything */
|
||
LOGLINE(aic);
|
||
outb(DMACNTRL0, INTEN);
|
||
return;
|
||
} else {
|
||
printf("aic: SCSI bus parity error\n");
|
||
outb(CLRSINT1, CLRSCSIPERR);
|
||
if (aic->prevphase == PH_MSGI)
|
||
aic_sched_msgout(SEND_PARITY_ERROR);
|
||
else
|
||
aic_sched_msgout(SEND_INIT_DET_ERR);
|
||
}
|
||
}
|
||
|
||
/*
|
||
* If we're not already busy doing something test for the following
|
||
* conditions:
|
||
* 1) We have been reselected by something
|
||
* 2) We have selected something successfully
|
||
* 3) Our selection process has timed out
|
||
* 4) This is really a bus free interrupt just to get a new command
|
||
* going?
|
||
* 5) Spurious interrupt?
|
||
*/
|
||
sstat0 = inb(SSTAT0);
|
||
AIC_MISC(("s0:0x%02x ", sstat0));
|
||
if (aic->state != AIC_HASNEXUS) { /* No nexus yet */
|
||
if (sstat0 & SELDI) {
|
||
LOGLINE(aic);
|
||
/* We have been reselected. Things to do:
|
||
* a) If we're trying to select something ourselves
|
||
* back off the current command.
|
||
* b) "Wait" for a message in phase (IDENTIFY)
|
||
* c) Call aic_msgin() to get the identify message and
|
||
* retrieve the disconnected command from the wait
|
||
* queue.
|
||
*/
|
||
AIC_MISC(("reselect "));
|
||
/* If we're trying to select a target ourselves,
|
||
* push our command back into the rdy list.
|
||
*/
|
||
if (aic->state == AIC_SELECTING) {
|
||
AIC_MISC(("backoff selector "));
|
||
TAILQ_INSERT_HEAD(&aic->ready_list, aic->nexus,
|
||
chain);
|
||
aic->nexus = NULL;
|
||
}
|
||
aic->state = AIC_RESELECTED;
|
||
/* Clear interrupts, disable future selection stuff
|
||
* including select interrupts and timeouts
|
||
*/
|
||
outb(CLRSINT0, CLRSELDI);
|
||
outb(SCSISEQ, 0);
|
||
outb(SIMODE0, 0);
|
||
/* Setup chip so we may detect spurious busfree
|
||
* conditions later.
|
||
*/
|
||
outb(CLRSINT1, CLRBUSFREE);
|
||
outb(SIMODE1, ENSCSIRST|ENBUSFREE|
|
||
ENSCSIPERR|ENREQINIT);
|
||
/* Now, we're expecting an IDENTIFY message. */
|
||
aic->phase = aicphase(aic);
|
||
if (aic->phase & PH_PSBIT) {
|
||
LOGLINE(aic);
|
||
outb(DMACNTRL0, INTEN);
|
||
return; /* Come back when REQ is set */
|
||
}
|
||
if (aic->phase == PH_MSGI)
|
||
aic_msgin(aic); /* Handle identify message */
|
||
else {
|
||
/* Things are seriously fucked up.
|
||
* Pull the brakes, i.e. RST
|
||
*/
|
||
printf("aic at line %d: target didn't identify\n", __LINE__);
|
||
Debugger("aic6360");
|
||
fatal_if_no_DDB();
|
||
aic_init(aic);
|
||
return;
|
||
}
|
||
if (aic->state != AIC_HASNEXUS) {/* IDENTIFY fail?! */
|
||
printf("aic at line %d: identify failed\n",
|
||
__LINE__);
|
||
aic_init(aic);
|
||
return;
|
||
} else {
|
||
outb(SIMODE1,
|
||
ENSCSIRST|ENBUSFREE|ENSCSIPERR|ENREQINIT);
|
||
/* Fallthrough to HASNEXUS part of aicintr */
|
||
}
|
||
} else if (sstat0 & SELDO) {
|
||
LOGLINE(aic);
|
||
/* We have selected a target. Things to do:
|
||
* a) Determine what message(s) to send.
|
||
* b) Verify that we're still selecting the target.
|
||
* c) Mark device as busy.
|
||
*/
|
||
acb = aic->nexus;
|
||
if (!acb) {
|
||
printf("aic at line %d: missing acb", __LINE__);
|
||
Debugger("aic6360");
|
||
fatal_if_no_DDB();
|
||
}
|
||
sc = acb->xs->sc_link;
|
||
ti = &aic->tinfo[sc->target];
|
||
if (acb->xs->flags & SCSI_RESET)
|
||
aic->msgpriq = SEND_DEV_RESET;
|
||
else if (ti->flags & DO_NEGOTIATE)
|
||
aic->msgpriq = SEND_IDENTIFY|SEND_SDTR;
|
||
else
|
||
aic->msgpriq = SEND_IDENTIFY;
|
||
/* Setup chip to enable later testing for busfree
|
||
* conditions
|
||
*/
|
||
outb(CLRSINT1, CLRBUSFREE);
|
||
outb(SCSISEQ, 0); /* Stop selection stuff */
|
||
nandreg(SIMODE0, ENSELDO); /* No more selectout ints */
|
||
sstat0 = inb(SSTAT0);
|
||
if (sstat0 & SELDO) { /* Still selected!? */
|
||
outb(SIMODE0, 0);
|
||
outb(SIMODE1, ENSCSIRST|ENSCSIPERR|
|
||
ENBUSFREE|ENREQINIT);
|
||
aic->state = AIC_HASNEXUS;
|
||
aic->flags = 0;
|
||
aic->prevphase = PH_INVALID;
|
||
aic->dp = acb->daddr;
|
||
aic->dleft = acb->dleft;
|
||
ti->lubusy |= (1<<sc->lun);
|
||
AIC_MISC(("select ok "));
|
||
} else {
|
||
/* Has seen busfree since selection, i.e.
|
||
* a "spurious" selection. Shouldn't happen.
|
||
*/
|
||
printf("aic: unexpected busfree\n");
|
||
#ifdef __FreeBSD__
|
||
acb->xs->error = XS_DRIVER_STUFFUP;
|
||
#else
|
||
xs->error = XS_DRIVER_STUFFUP;
|
||
#endif
|
||
untimeout(aic_timeout, (caddr_t)acb);
|
||
aic_done(acb);
|
||
}
|
||
LOGLINE(aic);
|
||
outb(DMACNTRL0, INTEN);
|
||
return;
|
||
} else if (sstat1 & SELTO) {
|
||
/* Selection timed out. What to do:
|
||
* Disable selections out and fail the command with
|
||
* code XS_TIMEOUT.
|
||
*/
|
||
acb = aic->nexus;
|
||
if (!acb) {
|
||
printf("aic at line %d: missing acb", __LINE__);
|
||
Debugger("aic6360");
|
||
fatal_if_no_DDB();
|
||
}
|
||
outb(SCSISEQ, ENRESELI|ENAUTOATNP);
|
||
outb(SXFRCTL1, 0);
|
||
outb(CLRSINT1, CLRSELTIMO);
|
||
aic->state = AIC_IDLE;
|
||
acb->xs->error = XS_TIMEOUT;
|
||
untimeout(aic_timeout, (caddr_t)acb);
|
||
aic_done(acb);
|
||
LOGLINE(aic);
|
||
outb(DMACNTRL0, INTEN);
|
||
return;
|
||
} else {
|
||
/* Assume a bus free interrupt. What to do:
|
||
* Start selecting.
|
||
*/
|
||
if (aic->state == AIC_IDLE)
|
||
aic_sched(aic);
|
||
#if AIC_DEBUG
|
||
else
|
||
AIC_MISC(("Extra aic6360 interrupt."));
|
||
#endif
|
||
LOGLINE(aic);
|
||
outb(DMACNTRL0, INTEN);
|
||
return;
|
||
}
|
||
}
|
||
/* Driver is now in state AIC_HASNEXUS, i.e. we have a current command
|
||
* working the SCSI bus.
|
||
*/
|
||
acb = aic->nexus;
|
||
if (aic->state != AIC_HASNEXUS || acb == NULL) {
|
||
printf("aic: no nexus!!\n");
|
||
Debugger("aic6360");
|
||
fatal_if_no_DDB();
|
||
}
|
||
|
||
/* What sort of transfer does the bus signal? */
|
||
aic->phase = aicphase(aic);
|
||
if (!(aic->phase & PH_PSBIT)) /* not a pseudo phase */
|
||
outb(SCSISIGO, aic->phase);
|
||
outb(CLRSINT1, CLRPHASECHG);
|
||
/* These interrupts are enabled by default:
|
||
* SCSIRSTI, SCSIPERR, BUSFREE, REQINIT
|
||
*/
|
||
switch (aic->phase) {
|
||
case PH_MSGO:
|
||
LOGLINE(aic);
|
||
if (aic_debug & AIC_SHOWMISC)
|
||
printf("PH_MSGO ");
|
||
aic_msgout(aic);
|
||
aic->prevphase = PH_MSGO;
|
||
/* Setup interrupts before leaving */
|
||
outb(SIMODE0, 0);
|
||
outb(SIMODE1, ENSCSIRST|ENBUSFREE|ENSCSIPERR|ENREQINIT);
|
||
/* Enabled ints: SCSIPERR, SCSIRSTI (unexpected)
|
||
* REQINIT (expected) BUSFREE (possibly expected)
|
||
*/
|
||
break;
|
||
case PH_CMD: /* CMD phase & REQ asserted */
|
||
LOGLINE(aic);
|
||
if (aic_debug & AIC_SHOWMISC)
|
||
printf("PH_CMD 0x%02x (%d) ",
|
||
acb->cmd.opcode, acb->clen);
|
||
outb(SCSISIGO, PH_CMD);
|
||
/* Use FIFO for CMDs. Assumes that no cmd > 128 bytes. OK? */
|
||
/* Clear hostFIFO and enable EISA-hostFIFO transfers */
|
||
outb(DMACNTRL0, WRITE|RSTFIFO|INTEN); /* 3(4) */
|
||
/* Clear scsiFIFO and enable SCSI-interface
|
||
& hostFIFO-scsiFIFO transfers */
|
||
outb(SXFRCTL0, CHEN|CLRCH|CLRSTCNT); /* 4 */
|
||
outb(SXFRCTL0, SCSIEN|DMAEN|CHEN); /* 5 */
|
||
outb(DMACNTRL0, ENDMA|WRITE|INTEN); /* 3+6 */
|
||
/* What (polled) interrupts to enable */
|
||
outb(SIMODE1, ENPHASEMIS|ENSCSIRST|ENBUSFREE|ENSCSIPERR);
|
||
/* DFIFOEMP is set, FIFO (128 byte) is always big enough */
|
||
outsw(DMADATA, (short *)&acb->cmd, acb->clen>>1);
|
||
|
||
/* Wait for SCSI FIFO to drain */
|
||
LOGLINE(aic);
|
||
do {
|
||
sstat2 = inb(SSTAT2);
|
||
} while (!(sstat2 & SEMPTY) && !(inb(DMASTAT) & INTSTAT));
|
||
if (!(inb(SSTAT2) & SEMPTY)) {
|
||
printf("aic at line %d: SCSI-FIFO didn't drain\n",
|
||
__LINE__);
|
||
Debugger("aic6360");
|
||
fatal_if_no_DDB();
|
||
acb->xs->error = XS_DRIVER_STUFFUP;
|
||
untimeout(aic_timeout, (caddr_t)acb);
|
||
aic_done(acb);
|
||
aic_init(aic);
|
||
return;
|
||
}
|
||
outb(SXFRCTL0, CHEN); /* Clear SCSIEN & DMAEN */
|
||
outb(SIMODE0, 0);
|
||
outb(SIMODE1, ENSCSIRST|ENBUSFREE|ENSCSIPERR);
|
||
LOGLINE(aic);
|
||
do {
|
||
sxfrctl0 = inb(SXFRCTL0);
|
||
} while (sxfrctl0 & SCSIEN && !(inb(DMASTAT) & INTSTAT));
|
||
if (sxfrctl0 & SCSIEN) {
|
||
printf("aic at line %d: scsi xfer never finished\n",
|
||
__LINE__);
|
||
Debugger("aic6360");
|
||
fatal_if_no_DDB();
|
||
acb->xs->error = XS_DRIVER_STUFFUP;
|
||
untimeout(aic_timeout, (caddr_t)acb);
|
||
aic_done(acb);
|
||
aic_init(aic);
|
||
return;
|
||
}
|
||
outb(SIMODE1, ENSCSIRST|ENBUSFREE|ENSCSIPERR|ENREQINIT);
|
||
/* Enabled ints: BUSFREE, SCSIPERR, SCSIRSTI (unexpected)
|
||
* REQINIT (expected)
|
||
*/
|
||
aic->prevphase = PH_CMD;
|
||
break;
|
||
case PH_DOUT:
|
||
LOGLINE(aic);
|
||
AIC_MISC(("PH_DOUT [%d] ",aic->dleft));
|
||
aic_dataout(aic);
|
||
aic->prevphase = PH_DOUT;
|
||
break;
|
||
case PH_MSGI:
|
||
LOGLINE(aic);
|
||
if (aic_debug & AIC_SHOWMISC)
|
||
printf("PH_MSGI ");
|
||
aic_msgin(aic);
|
||
outb(SIMODE1, ENSCSIRST|ENBUSFREE|ENSCSIPERR|ENREQINIT);
|
||
aic->prevphase = PH_MSGI;
|
||
break;
|
||
case PH_DIN:
|
||
LOGLINE(aic);
|
||
if (aic_debug & AIC_SHOWMISC)
|
||
printf("PH_DIN ");
|
||
aic_datain(aic);
|
||
aic->prevphase = PH_DIN;
|
||
break;
|
||
case PH_STAT:
|
||
LOGLINE(aic);
|
||
if (aic_debug & AIC_SHOWMISC)
|
||
printf("PH_STAT ");
|
||
outb(SCSISIGO, PH_STAT);
|
||
outb(SXFRCTL0, CHEN|SPIOEN);
|
||
outb(DMACNTRL0, RSTFIFO|INTEN);
|
||
outb(SIMODE1, ENSCSIRST|ENPHASEMIS|ENBUSFREE|ENSCSIPERR);
|
||
acb->stat = inb(SCSIDAT);
|
||
outb(SXFRCTL0, CHEN);
|
||
if (aic_debug & AIC_SHOWMISC)
|
||
printf("0x%02x ", acb->stat);
|
||
outb(SIMODE1, ENSCSIRST|ENBUSFREE|ENSCSIPERR|ENREQINIT);
|
||
aic->prevphase = PH_STAT;
|
||
break;
|
||
case PH_INVALID:
|
||
LOGLINE(aic);
|
||
break;
|
||
case PH_BUSFREE:
|
||
LOGLINE(aic);
|
||
if (aic->flags & AIC_BUSFREE_OK) { /*It's fun the 1st time.. */
|
||
aic->flags &= ~AIC_BUSFREE_OK;
|
||
} else {
|
||
printf("aic at line %d: unexpected busfree phase\n",
|
||
__LINE__);
|
||
Debugger("aic6360");
|
||
fatal_if_no_DDB();
|
||
}
|
||
break;
|
||
default:
|
||
printf("aic at line %d: bogus bus phase\n", __LINE__);
|
||
Debugger("aic6360");
|
||
fatal_if_no_DDB();
|
||
break;
|
||
}
|
||
LOGLINE(aic);
|
||
outb(DMACNTRL0, INTEN);
|
||
return;
|
||
}
|
||
|
||
void
|
||
aic_timeout(void *arg1) {
|
||
int s = splbio();
|
||
struct acb *acb = (struct acb *)arg1;
|
||
#ifdef __FreeBSD__
|
||
int unit;
|
||
struct aic_data *aic;
|
||
#else
|
||
struct aic_softc *aic;
|
||
#endif
|
||
|
||
#ifdef __FreeBSD__
|
||
unit = acb->xs->sc_link->adapter_unit;
|
||
aic = aicdata[unit];
|
||
#else
|
||
aic = acb->xs->sc_link->adapter_softc;
|
||
#endif
|
||
sc_print_addr(acb->xs->sc_link);
|
||
acb->xs->error = XS_TIMEOUT;
|
||
printf("timed out\n");
|
||
|
||
aic_done(acb);
|
||
splx(s);
|
||
}
|
||
|
||
#if AIC_DEBUG
|
||
/*
|
||
* The following functions are mostly used for debugging purposes, either
|
||
* directly called from the driver or from the kernel debugger.
|
||
*/
|
||
|
||
void
|
||
aic_show_scsi_cmd(acb)
|
||
struct acb *acb;
|
||
{
|
||
u_char *b = (u_char *)&acb->cmd;
|
||
struct scsi_link *sc = acb->xs->sc_link;
|
||
int i;
|
||
|
||
sc_print_addr(sc);
|
||
if (!(acb->xs->flags & SCSI_RESET)) {
|
||
for (i = 0; i < acb->clen; i++) {
|
||
if (i)
|
||
printf(",");
|
||
printf("%x", b[i]);
|
||
}
|
||
printf("\n");
|
||
} else
|
||
printf("RESET\n");
|
||
}
|
||
|
||
void
|
||
aic_print_acb(acb)
|
||
struct acb *acb;
|
||
{
|
||
|
||
printf("acb@%x xs=%x flags=%x", acb, acb->xs, acb->flags);
|
||
printf(" daddr=%x dleft=%d stat=%x\n",
|
||
(long)acb->daddr, acb->dleft, acb->stat);
|
||
aic_show_scsi_cmd(acb);
|
||
}
|
||
|
||
void
|
||
aic_print_active_acb()
|
||
{
|
||
struct acb *acb;
|
||
#ifdef __FreeBSD__
|
||
struct aic_data *aic = aicdata[0];
|
||
#else
|
||
struct aic_softc *aic = aiccd.cd_devs[0];
|
||
#endif
|
||
|
||
printf("ready list:\n");
|
||
for (acb = aic->ready_list.tqh_first; acb; acb = acb->chain.tqe_next)
|
||
aic_print_acb(acb);
|
||
printf("nexus:\n");
|
||
if (aic->nexus)
|
||
aic_print_acb(aic->nexus);
|
||
printf("nexus list:\n");
|
||
for (acb = aic->nexus_list.tqh_first; acb; acb = acb->chain.tqe_next)
|
||
aic_print_acb(acb);
|
||
}
|
||
|
||
void
|
||
aic_dump6360()
|
||
{
|
||
u_short iobase = 0x340;
|
||
|
||
printf("aic6360: SCSISEQ=%x SXFRCTL0=%x SXFRCTL1=%x SCSISIGI=%x\n",
|
||
inb(SCSISEQ), inb(SXFRCTL0), inb(SXFRCTL1), inb(SCSISIGI));
|
||
printf(" SSTAT0=%x SSTAT1=%x SSTAT2=%x SSTAT3=%x SSTAT4=%x\n",
|
||
inb(SSTAT0), inb(SSTAT1), inb(SSTAT2), inb(SSTAT3), inb(SSTAT4));
|
||
printf(" SIMODE0=%x SIMODE1=%x DMACNTRL0=%x DMACNTRL1=%x DMASTAT=%x\n",
|
||
inb(SIMODE0), inb(SIMODE1), inb(DMACNTRL0), inb(DMACNTRL1),
|
||
inb(DMASTAT));
|
||
printf(" FIFOSTAT=%d SCSIBUS=0x%x\n",
|
||
inb(FIFOSTAT), inb(SCSIBUS));
|
||
}
|
||
|
||
void
|
||
aic_dump_driver()
|
||
{
|
||
#ifdef __FreeBSD__
|
||
struct aic_data *aic = aicdata[0];
|
||
#else
|
||
struct aic_softc *aic = aiccd.cd_devs[0];
|
||
#endif
|
||
struct aic_tinfo *ti;
|
||
int i;
|
||
|
||
printf("nexus=%x phase=%x prevphase=%x\n", aic->nexus, aic->phase,
|
||
aic->prevphase);
|
||
printf("state=%x msgin=%x msgpriq=%x msgout=%x imlen=%d omlen=%d\n",
|
||
aic->state, aic->imess[0], aic->msgpriq, aic->msgout, aic->imlen,
|
||
aic->omlen);
|
||
printf("history:");
|
||
i = aic->hp;
|
||
do {
|
||
printf(" %d", aic->history[i]);
|
||
i = (i + 1) % AIC_HSIZE;
|
||
} while (i != aic->hp);
|
||
printf("*\n");
|
||
for (i = 0; i < 7; i++) {
|
||
ti = &aic->tinfo[i];
|
||
printf("tinfo%d: %d cmds %d disconnects %d timeouts",
|
||
i, ti->cmds, ti->dconns, ti->touts);
|
||
printf(" %d senses flags=%x\n", ti->senses, ti->flags);
|
||
}
|
||
}
|
||
#endif
|