b6e49ed332
loop. Perform a "-Wall" cleanup which actually exposed two real bugs having to do with operator precedence.
404 lines
12 KiB
C
404 lines
12 KiB
C
/*
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* Interface to the generic driver for the aic7xxx based adaptec
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* SCSI controllers. This is used to implement product specific
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* probe and attach routines.
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*
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* Copyright (c) 1994-1997 Justin Gibbs.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification, immediately at the beginning of the file.
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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. 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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* Where this Software is combined with software released under the terms of
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* the GNU Public License ("GPL") and the terms of the GPL would require the
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* combined work to also be released under the terms of the GPL, the terms
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* and conditions of this License will apply in addition to those of the
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* GPL with the exception of any terms or conditions of this License that
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* conflict with, or are expressly prohibited by, the GPL.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR 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, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: aic7xxx.h,v 1.42 1997/08/13 17:02:47 gibbs Exp $
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*/
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#ifndef _AIC7XXX_H_
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#define _AIC7XXX_H_
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#if defined(__FreeBSD__)
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#include "ahc.h" /* for NAHC from config */
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#include "opt_aic7xxx.h" /* for config options */
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#endif
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#if defined(__NetBSD__)
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/*
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* convert FreeBSD's <sys/queue.h> symbols to NetBSD's
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*/
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#define STAILQ_ENTRY SIMPLEQ_ENTRY
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#define STAILQ_HEAD SIMPLEQ_HEAD
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#define STAILQ_INIT SIMPLEQ_INIT
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#define STAILQ_INSERT_HEAD SIMPLEQ_INSERT_HEAD
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#define STAILQ_INSERT_TAIL SIMPLEQ_INSERT_TAIL
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#define STAILQ_REMOVE_HEAD(head, field) \
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SIMPLEQ_REMOVE_HEAD(head, (head)->sqh_first, field)
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#define stqh_first sqh_first
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#define stqe_next sqe_next
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#endif
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#define AHC_NSEG 32 /* The number of dma segments supported.
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* AHC_NSEG can be maxed out at 256 entries,
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* but the kernel will never need to transfer
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* such a large (1MB) request. To reduce the
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* driver's memory consumption, we reduce the
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* max to 32. 16 would work if all transfers
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* are paged alined since the kernel will only
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* generate at most a 64k transfer, but to
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* handle non-page aligned transfers, you need
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* 17, so we round to the next power of two
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* to make allocating SG space easy and
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* efficient.
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*/
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#define AHC_SCB_MAX 255 /*
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* Up to 255 SCBs on some types of aic7xxx
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* based boards. The aic7870 have 16 internal
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* SCBs, but external SRAM bumps this to 255.
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* The aic7770 family have only 4, and the
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* aic7850 has only 3.
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*/
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typedef u_int32_t physaddr;
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#if defined(__FreeBSD__)
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extern u_long ahc_unit;
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#endif
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struct ahc_dma_seg {
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physaddr addr;
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u_int32_t len;
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};
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typedef enum {
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AHC_NONE = 0x0000,
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AHC_ULTRA = 0x0001, /* Supports 20MHz Transfers */
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AHC_WIDE = 0x0002, /* Wide Channel */
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AHC_TWIN = 0x0008, /* Twin Channel */
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AHC_AIC7770 = 0x0010,
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AHC_AIC7850 = 0x0020,
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AHC_AIC7860 = 0x0021, /* ULTRA version of the aic7850 */
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AHC_AIC7870 = 0x0040,
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AHC_AIC7880 = 0x0041,
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AHC_AIC78X0 = 0x0060, /* PCI Based Controller */
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AHC_274 = 0x0110, /* EISA Based Controller */
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AHC_284 = 0x0210, /* VL/ISA Based Controller */
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AHC_294AU = 0x0421, /* aic7860 based '2940' */
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AHC_294 = 0x0440, /* PCI Based Controller */
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AHC_294U = 0x0441, /* ULTRA PCI Based Controller */
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AHC_394 = 0x0840, /* Twin Channel PCI Controller */
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AHC_394U = 0x0841, /* ULTRA, Twin Channel PCI Controller */
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AHC_398 = 0x1040, /* Multi Channel PCI RAID Controller */
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AHC_398U = 0x1041, /* ULTRA, Multi Channel PCI
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* RAID Controller
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*/
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AHC_39X = 0x1800 /* Multi Channel PCI Adapter */
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}ahc_type;
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typedef enum {
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AHC_FNONE = 0x00,
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AHC_INIT = 0x01,
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AHC_RUNNING = 0x02,
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AHC_PAGESCBS = 0x04, /* Enable SCB paging */
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AHC_CHANNEL_B_PRIMARY = 0x08, /*
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* On twin channel adapters, probe
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* channel B first since it is the
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* primary bus.
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*/
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AHC_USEDEFAULTS = 0x10, /*
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* For cards without an seeprom
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* or a BIOS to initialize the chip's
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* SRAM, we use the default target
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* settings.
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*/
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AHC_CHNLB = 0x20, /*
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* Second controller on 3940/398X
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* Also encodes the offset in the
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* SEEPROM for CHNLB info (32)
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*/
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AHC_CHNLC = 0x40 /*
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* Third controller on 3985
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* Also encodes the offset in the
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* SEEPROM for CHNLC info (64)
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*/
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} ahc_flag;
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typedef enum {
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SCB_FREE = 0x0000,
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SCB_ACTIVE = 0x0001,
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SCB_ABORTED = 0x0002,
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SCB_DEVICE_RESET = 0x0004,
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SCB_SENSE = 0x0008,
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SCB_TIMEDOUT = 0x0010,
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SCB_QUEUED_FOR_DONE = 0x0020,
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SCB_RECOVERY_SCB = 0x0040,
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SCB_WAITINGQ = 0x0080,
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SCB_ASSIGNEDQ = 0x0100,
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SCB_SENTORDEREDTAG = 0x0200,
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SCB_MSGOUT_SDTR = 0x0400,
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SCB_MSGOUT_WDTR = 0x0800,
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SCB_ABORT = 0x1000,
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SCB_QUEUED_ABORT = 0x2000
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} scb_flag;
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/*
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* The driver keeps up to MAX_SCB scb structures per card in memory. The SCB
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* consists of a "hardware SCB" mirroring the fields availible on the card
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* and additional information the kernel stores for each transaction.
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*/
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struct hardware_scb {
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/*0*/ u_int8_t control;
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/*1*/ u_int8_t tcl; /* 4/1/3 bits */
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/*2*/ u_int8_t status;
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/*3*/ u_int8_t SG_segment_count;
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/*4*/ physaddr SG_list_pointer;
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/*8*/ u_int8_t residual_SG_segment_count;
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/*9*/ u_int8_t residual_data_count[3];
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/*12*/ physaddr data;
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/*16*/ u_int32_t datalen; /* Really only three bits, but its
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* faster to treat it as a long on
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* a quad boundary.
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*/
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/*20*/ physaddr cmdpointer;
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/*24*/ u_int8_t cmdlen;
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/*25*/ u_int8_t tag; /* Index into our kernel SCB array.
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* Also used as the tag for tagged I/O
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*/
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#define SCB_PIO_TRANSFER_SIZE 26 /* amount we need to upload/download
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* via PIO to initialize a transaction.
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*/
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/*26*/ u_int8_t next; /* Used for threading SCBs in the
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* "Waiting for Selection" and
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* "Disconnected SCB" lists down
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* in the sequencer.
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*/
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/*27*/ u_int8_t prev;
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/*28*/ u_int32_t pad; /*
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* Unused by the kernel, but we require
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* the padding so that the array of
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* hardware SCBs is alligned on 32 byte
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* boundaries so the sequencer can
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* index them easily.
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*/
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};
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struct scb {
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struct hardware_scb *hscb;
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STAILQ_ENTRY(scb) links; /* for chaining */
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struct scsi_xfer *xs; /* the scsi_xfer for this cmd */
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scb_flag flags;
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struct ahc_dma_seg *ahc_dma;/* Pointer to SG segments */
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struct scsi_sense sense_cmd;
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u_int8_t sg_count;/* How full ahc_dma_seg is */
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u_int8_t position;/* Position in card's scbarray */
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};
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struct scb_data {
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struct hardware_scb *hscbs; /* Array of hardware SCBs */
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struct scb *scbarray[AHC_SCB_MAX]; /* Array of kernel SCBs */
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STAILQ_HEAD(, scb) free_scbs; /*
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* Pool of SCBs ready to be assigned
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* commands to execute.
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*/
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u_int8_t numscbs;
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u_int8_t maxhscbs; /* Number of SCBs on the card */
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u_int8_t maxscbs; /*
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* Max SCBs we allocate total including
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* any that will force us to page SCBs
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*/
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};
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struct ahc_busreset_args {
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struct ahc_softc *ahc;
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char bus;
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};
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struct ahc_softc {
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#if defined(__FreeBSD__)
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int unit;
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#elif defined(__NetBSD__)
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struct device sc_dev;
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void *sc_ih;
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bus_chipset_tag_t sc_bc;
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bus_io_handle_t sc_ioh;
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#endif
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ahc_type type;
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ahc_flag flags;
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#if defined(__FreeBSD__)
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u_int32_t baseport;
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#endif
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volatile u_int8_t *maddr;
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struct scb_data *scb_data;
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struct scsi_link sc_link;
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struct scsi_link sc_link_b; /* Second bus for Twin channel cards */
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STAILQ_HEAD(, scb) waiting_scbs;/*
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* SCBs waiting ready to go but
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* waiting for space in the QINFIFO.
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*/
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STAILQ_HEAD(, scb) cmplete_scbs;/*
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* SCBs out of the QOUTFIFO, waiting
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* to be ahc_done'd.
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*/
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u_int8_t activescbs;
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u_int8_t cmdoutcnt;
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u_int16_t needsdtr_orig; /* Targets we initiate sync neg with */
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u_int16_t needwdtr_orig; /* Targets we initiate wide neg with */
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u_int16_t needsdtr; /* Current list of negotiated targets */
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u_int16_t needwdtr; /* Current list of negotiated targets */
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u_int16_t sdtrpending; /* Pending SDTR to these targets */
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u_int16_t wdtrpending; /* Pending WDTR to these targets */
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u_int16_t tagenable; /* Targets that can handle tags */
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u_int16_t orderedtag; /* Targets to use ordered tag on */
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u_int16_t discenable; /* Targets allowed to disconnect */
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u_int8_t our_id; /* our scsi id */
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u_int8_t our_id_b; /* B channel scsi id */
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u_int8_t qcntmask; /*
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* Mask of valid registers in the
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* Q*CNT registers.
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*/
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u_int8_t qfullcount; /*
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* The maximum number of entries
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* storable in the Q*FIFOs.
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*/
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u_int8_t curqincnt; /*
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* The current value we "think" the
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* QINCNT has. The reason it is
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* "think" is that this is a cached
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* value that is only updated when
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* curqincount == qfullcount to reduce
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* the amount of accesses made to the
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* card.
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*/
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u_int8_t unpause;
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u_int8_t pause;
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u_int8_t in_timeout;
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};
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struct full_ahc_softc {
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struct ahc_softc softc;
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struct scb_data scb_data_storage;
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};
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/* #define AHC_DEBUG */
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#ifdef AHC_DEBUG
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/* Different debugging levels used when AHC_DEBUG is defined */
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#define AHC_SHOWMISC 0x0001
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#define AHC_SHOWCMDS 0x0002
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#define AHC_SHOWSCBS 0x0004
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#define AHC_SHOWABORTS 0x0008
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#define AHC_SHOWSENSE 0x0010
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#define AHC_SHOWSCBCNT 0x0020
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extern int ahc_debug; /* Initialized in i386/scsi/aic7xxx.c */
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#endif
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#if defined(__FreeBSD__)
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char *ahc_name __P((struct ahc_softc *ahc));
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struct ahc_softc *ahc_alloc __P((int unit, u_int32_t io_base,
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vm_offset_t maddr, ahc_type type,
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ahc_flag flags, struct scb_data *scb_data));
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#elif defined(__NetBSD__)
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#define ahc_name(ahc) (ahc)->sc_dev.dv_xname
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void ahc_construct __P((struct ahc_softc *ahc, bus_chipset_tag_t bc, bus_io_handle_t ioh, ahc_type type, ahc_flag flags));
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#endif
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void ahc_reset __P((struct ahc_softc *ahc));
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void ahc_free __P((struct ahc_softc *));
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int ahc_init __P((struct ahc_softc *));
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int ahc_attach __P((struct ahc_softc *));
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#if defined(__FreeBSD__)
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void ahc_intr __P((void *arg));
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#elif defined(__NetBSD__)
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int ahc_intr __P((void *arg));
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#endif
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#if defined(__FreeBSD__)
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static __inline u_int8_t ahc_inb __P((struct ahc_softc *ahc, u_int32_t port));
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static __inline void ahc_outb __P((struct ahc_softc *ahc, u_int32_t port,
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u_int8_t val));
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static __inline void ahc_outsb __P((struct ahc_softc *ahc, u_int32_t port,
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u_int8_t *valp, size_t size));
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static __inline u_int8_t
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ahc_inb(ahc, port)
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struct ahc_softc *ahc;
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u_int32_t port;
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{
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if (ahc->maddr != NULL)
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return ahc->maddr[port];
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else
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return inb(ahc->baseport + port);
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}
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static __inline void
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ahc_outb(ahc, port, val)
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struct ahc_softc *ahc;
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u_int32_t port;
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u_int8_t val;
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{
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if (ahc->maddr != NULL)
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ahc->maddr[port] = val;
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else
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outb(ahc->baseport + port, val);
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}
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static __inline void
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ahc_outsb(ahc, port, valp, size)
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struct ahc_softc *ahc;
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u_int32_t port;
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u_int8_t *valp;
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size_t size;
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{
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if (ahc->maddr != NULL) {
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__asm __volatile("
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cld;
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1: lodsb;
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movb %%al,(%0);
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loop 1b" :
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:
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"r" ((ahc)->maddr + (port)),
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"S" ((valp)), "c" ((size)) :
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"%esi", "%ecx", "%eax");
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} else
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outsb(ahc->baseport + port, valp, size);
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}
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#elif defined(__NetBSD__)
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#define ahc_inb(ahc, port) \
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bus_io_read_1((ahc)->sc_bc, (ahc)->sc_ioh, port)
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#define ahc_outb(ahc, port, val) \
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bus_io_write_1((ahc)->sc_bc, (ahc)->sc_ioh, port, val)
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#define ahc_outsb(ahc, port, valp, size) \
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bus_io_write_multi_1((ahc)->sc_bc, (ahc)->sc_ioh, port, valp, size)
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#endif
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#endif /* _AIC7XXX_H_ */
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