11037c013d
past we stored this data in the CCB and attained the CCB via a pointer in the SCB. In ahc_timeout(), however, the timedout SCB may have already been completed (inherent race), meaning that the CCB could have been recycled, and the ahc pointer reset. Clean up the logic in ahc_search_qinfifo that deals with the busy device table. For some reason it assumed that the only valid time to search to see if additional lun entries should be checked was if lun 0 matched. Now we properly itterate through the necessary luns. The busy device table is used to detect invalid reselections, so a device would have had to perform an unexpected reselection for this to cause problems. Further, all luns are collapsed to a single entry unless we have external ram with large SCBs (3940AU models) so the chance of this happening was rather remote. Clean up the logic for dealing with the untagged queues. We now set a flag in the SCB that indicates that it is on the untagged queue instead of inferring this from the type and setup of the CCB pased into us by CAM. In ahc_timeout(), don't print the path of the SCB until the controller is paused and we are sure that it has not completed yet. This, in conjunction with referencing the ahc pointer in the SCB rather than the CCB in the SCB avoids panics in the case of a timedout scb completing just before the timeout handler runs. This turns out to be guaranteed if interrupt delivery is failing, as we run our interrupt handler to flush any "just missed events" when a timeout occurs. Mention the likelyhood of broken interrupts if a timedout SCB is completed by our call to ahc_intr().
1111 lines
35 KiB
C
1111 lines
35 KiB
C
/*
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* Core definitions and data structures shareable across OS platforms.
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*
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* Copyright (c) 1994, 1995, 1996, 1997, 1998, 1999, 2000 Justin T. Gibbs.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. 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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* Alternatively, this software may be distributed under the terms of the
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* GNU Public License ("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: //depot/src/aic7xxx/aic7xxx.h#6 $
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*
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* $FreeBSD$
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*/
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#ifndef _AIC7XXX_H_
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#define _AIC7XXX_H_
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/* Register Definitions */
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#include "aic7xxx_reg.h"
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/************************* Forward Declarations *******************************/
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struct ahc_platform_data;
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struct scb_platform_data;
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/****************************** Useful Macros *********************************/
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#ifndef MAX
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#define MAX(a,b) (((a) > (b)) ? (a) : (b))
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#endif
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#ifndef MIN
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#define MIN(a,b) (((a) < (b)) ? (a) : (b))
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#endif
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#ifndef TRUE
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#define TRUE 1
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#endif
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#ifndef FALSE
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#define FALSE 0
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#endif
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#define NUM_ELEMENTS(array) (sizeof(array) / sizeof(*array))
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#define ALL_CHANNELS '\0'
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#define ALL_TARGETS_MASK 0xFFFF
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#define INITIATOR_WILDCARD (~0)
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#define SCSIID_TARGET(ahc, scsiid) \
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(((scsiid) & ((((ahc)->features & AHC_TWIN) != 0) ? TWIN_TID : TID)) \
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>> TID_SHIFT)
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#define SCSIID_OUR_ID(scsiid) \
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((scsiid) & OID)
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#define SCSIID_CHANNEL(ahc, scsiid) \
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((((ahc)->features & AHC_TWIN) != 0) \
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? ((((scsiid) & TWIN_CHNLB) != 0) ? 'B' : 'A') \
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: 'A')
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#define SCB_IS_SCSIBUS_B(ahc, scb) \
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(SCSIID_CHANNEL(ahc, (scb)->hscb->scsiid) == 'B')
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#define SCB_GET_OUR_ID(scb) \
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SCSIID_OUR_ID((scb)->hscb->scsiid)
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#define SCB_GET_TARGET(ahc, scb) \
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SCSIID_TARGET((ahc), (scb)->hscb->scsiid)
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#define SCB_GET_CHANNEL(ahc, scb) \
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SCSIID_CHANNEL(ahc, (scb)->hscb->scsiid)
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#define SCB_GET_LUN(scb) \
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((scb)->hscb->lun)
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#define SCB_GET_TARGET_OFFSET(ahc, scb) \
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(SCB_GET_TARGET(ahc, scb) + (SCB_IS_SCSIBUS_B(ahc, scb) ? 8 : 0))
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#define SCB_GET_TARGET_MASK(ahc, scb) \
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(0x01 << (SCB_GET_TARGET_OFFSET(ahc, scb)))
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#define TCL_TARGET_OFFSET(tcl) \
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((((tcl) >> 4) & TID) >> 4)
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#define TCL_LUN(tcl) \
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(tcl & (AHC_NUM_LUNS - 1))
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#define BUILD_TCL(scsiid, lun) \
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((lun) | (((scsiid) & TID) << 4))
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/**************************** Driver Constants ********************************/
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/*
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* The maximum number of supported targets.
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*/
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#define AHC_NUM_TARGETS 16
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/*
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* The maximum number of supported luns.
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* Although the identify message only supports 64 luns in SPI3, you
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* can have 2^64 luns when information unit transfers are enabled.
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* The max we can do sanely given the 8bit nature of the RISC engine
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* on these chips is 256.
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*/
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#define AHC_NUM_LUNS 256
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/*
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* The maximum transfer per S/G segment.
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*/
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#define AHC_MAXTRANSFER_SIZE 0x00ffffff /* limited by 24bit counter */
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/*
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* The maximum number of concurrent transactions supported per driver instance.
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* Sequencer Control Blocks (SCBs) store per-transaction information. Although
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* the space for SCBs on the host adapter varies by model, the driver will
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* page the SCBs between host and controller memory as needed. We are limited
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* to 255 because of the 8bit nature of the RISC engine and the need to
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* reserve the value of 255 as a "No Transaction" value.
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*/
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#define AHC_SCB_MAX 255
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/*
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* Ring Buffer of incoming target commands.
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* We allocate 256 to simplify the logic in the sequencer
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* by using the natural wrap point of an 8bit counter.
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*/
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#define AHC_TMODE_CMDS 256
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/* Reset line assertion time in us */
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#define AHC_BUSRESET_DELAY 250
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/******************* Chip Characteristics/Operating Settings *****************/
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/*
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* Chip Type
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* The chip order is from least sophisticated to most sophisticated.
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*/
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typedef enum {
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AHC_NONE = 0x0000,
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AHC_CHIPID_MASK = 0x00FF,
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AHC_AIC7770 = 0x0001,
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AHC_AIC7850 = 0x0002,
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AHC_AIC7855 = 0x0003,
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AHC_AIC7859 = 0x0004,
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AHC_AIC7860 = 0x0005,
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AHC_AIC7870 = 0x0006,
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AHC_AIC7880 = 0x0007,
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AHC_AIC7895 = 0x0008,
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AHC_AIC7895C = 0x0009,
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AHC_AIC7890 = 0x000a,
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AHC_AIC7896 = 0x000b,
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AHC_AIC7892 = 0x000c,
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AHC_AIC7899 = 0x000d,
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AHC_VL = 0x0100, /* Bus type VL */
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AHC_EISA = 0x0200, /* Bus type EISA */
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AHC_PCI = 0x0400, /* Bus type PCI */
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AHC_BUS_MASK = 0x0F00
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} ahc_chip;
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/*
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* Features available in each chip type.
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*/
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typedef enum {
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AHC_FENONE = 0x00000,
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AHC_ULTRA = 0x00001, /* Supports 20MHz Transfers */
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AHC_ULTRA2 = 0x00002, /* Supports 40MHz Transfers */
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AHC_WIDE = 0x00004, /* Wide Channel */
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AHC_TWIN = 0x00008, /* Twin Channel */
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AHC_MORE_SRAM = 0x00010, /* 80 bytes instead of 64 */
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AHC_CMD_CHAN = 0x00020, /* Has a Command DMA Channel */
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AHC_QUEUE_REGS = 0x00040, /* Has Queue management registers */
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AHC_SG_PRELOAD = 0x00080, /* Can perform auto-SG preload */
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AHC_SPIOCAP = 0x00100, /* Has a Serial Port I/O Cap Register */
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AHC_MULTI_TID = 0x00200, /* Has bitmask of TIDs for select-in */
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AHC_HS_MAILBOX = 0x00400, /* Has HS_MAILBOX register */
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AHC_DT = 0x00800, /* Double Transition transfers */
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AHC_NEW_TERMCTL = 0x01000, /* Newer termination scheme */
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AHC_MULTI_FUNC = 0x02000, /* Multi-Function Twin Channel Device */
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AHC_LARGE_SCBS = 0x04000, /* 64byte SCBs */
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AHC_AUTORATE = 0x08000, /* Automatic update of SCSIRATE/OFFSET*/
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AHC_AUTOPAUSE = 0x10000, /* Automatic pause on register access */
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AHC_AIC7770_FE = AHC_FENONE,
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AHC_AIC7850_FE = AHC_SPIOCAP|AHC_AUTOPAUSE,
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AHC_AIC7855_FE = AHC_AIC7850_FE,
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AHC_AIC7860_FE = AHC_AIC7850_FE|AHC_ULTRA,
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AHC_AIC7870_FE = AHC_FENONE,
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AHC_AIC7880_FE = AHC_ULTRA,
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AHC_AIC7890_FE = AHC_MORE_SRAM|AHC_CMD_CHAN|AHC_ULTRA2|AHC_QUEUE_REGS
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|AHC_SG_PRELOAD|AHC_MULTI_TID|AHC_HS_MAILBOX
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|AHC_NEW_TERMCTL|AHC_LARGE_SCBS,
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AHC_AIC7892_FE = AHC_AIC7890_FE|AHC_DT|AHC_AUTORATE|AHC_AUTOPAUSE,
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AHC_AIC7895_FE = AHC_AIC7880_FE|AHC_MORE_SRAM|AHC_AUTOPAUSE
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|AHC_CMD_CHAN|AHC_MULTI_FUNC|AHC_LARGE_SCBS,
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AHC_AIC7895C_FE = AHC_AIC7895_FE|AHC_MULTI_TID,
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AHC_AIC7896_FE = AHC_AIC7890_FE|AHC_MULTI_FUNC,
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AHC_AIC7899_FE = AHC_AIC7892_FE|AHC_MULTI_FUNC
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} ahc_feature;
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/*
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* Bugs in the silicon that we work around in software.
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*/
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typedef enum {
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AHC_BUGNONE = 0x00,
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/*
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* On all chips prior to the U2 product line,
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* the WIDEODD S/G segment feature does not
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* work during scsi->HostBus transfers.
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*/
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AHC_TMODE_WIDEODD_BUG = 0x01,
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/*
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* On the aic7890/91 Rev 0 chips, the autoflush
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* feature does not work. A manual flush of
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* the DMA FIFO is required.
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*/
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AHC_AUTOFLUSH_BUG = 0x02,
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/*
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* On many chips, cacheline streaming does not work.
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*/
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AHC_CACHETHEN_BUG = 0x04,
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/*
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* On the aic7896/97 chips, cacheline
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* streaming must be enabled.
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*/
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AHC_CACHETHEN_DIS_BUG = 0x08,
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/*
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* PCI 2.1 Retry failure on non-empty data fifo.
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*/
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AHC_PCI_2_1_RETRY_BUG = 0x10,
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/*
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* Controller does not handle cacheline residuals
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* properly on S/G segments if PCI MWI instructions
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* are allowed.
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*/
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AHC_PCI_MWI_BUG = 0x20,
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/*
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* An SCB upload using the SCB channel's
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* auto array entry copy feature may
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* corrupt data. This appears to only
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* occur on 66MHz systems.
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*/
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AHC_SCBCHAN_UPLOAD_BUG = 0x40
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} ahc_bug;
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/*
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* Configuration specific settings.
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* The driver determines these settings by probing the
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* chip/controller's configuration.
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*/
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typedef enum {
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AHC_FNONE = 0x000,
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AHC_PAGESCBS = 0x001,/* Enable SCB paging */
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AHC_CHANNEL_B_PRIMARY = 0x002,/*
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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 = 0x004,/*
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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_SHARED_SRAM = 0x010,
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AHC_LARGE_SEEPROM = 0x020,/* Uses C56_66 not C46 */
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AHC_RESET_BUS_A = 0x040,
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AHC_RESET_BUS_B = 0x080,
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AHC_EXTENDED_TRANS_A = 0x100,
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AHC_EXTENDED_TRANS_B = 0x200,
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AHC_TERM_ENB_A = 0x400,
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AHC_TERM_ENB_B = 0x800,
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AHC_INITIATORMODE = 0x1000,/*
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* Allow initiator operations on
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* this controller.
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*/
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AHC_TARGETMODE = 0x2000,/*
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* Allow target operations on this
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* controller.
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*/
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AHC_NEWEEPROM_FMT = 0x4000,
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AHC_RESOURCE_SHORTAGE = 0x8000,
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AHC_TQINFIFO_BLOCKED = 0x10000,/* Blocked waiting for ATIOs */
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AHC_INT50_SPEEDFLEX = 0x20000,/*
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* Internal 50pin connector
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* sits behind an aic3860
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*/
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AHC_SCB_BTT = 0x40000,/*
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* The busy targets table is
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* stored in SCB space rather
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* than SRAM.
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*/
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AHC_BIOS_ENABLED = 0x80000
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} ahc_flag;
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/*
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* Controller Information composed at probe time.
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*/
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struct ahc_probe_config {
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const char *description;
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char channel;
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char channel_b;
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ahc_chip chip;
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ahc_feature features;
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ahc_bug bugs;
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ahc_flag flags;
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};
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/************************* Hardware SCB Definition ***************************/
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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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* To minimize space utilization, a portion of the hardware scb stores
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* different data during different portions of a SCSI transaction.
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* As initialized by the host driver for the initiator role, this area
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* contains the SCSI cdb (or a pointer to the cdb) to be executed. After
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* the cdb has been presented to the target, this area serves to store
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* residual transfer information and the SCSI status byte.
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* For the target role, the contents of this area do not change, but
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* still serve a different purpose than for the initiator role. See
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* struct target_data for details.
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*/
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/*
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* Status information embedded in the shared poriton of
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* an SCB after passing the cdb to the target. The kernel
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* driver will only read this data for transactions that
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* complete abnormally (non-zero status byte).
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*/
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struct status_pkt {
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uint32_t residual_datacnt; /* Residual in the current S/G seg */
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uint32_t residual_sg_ptr; /* The next S/G for this transfer */
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uint8_t scsi_status; /* Standard SCSI status byte */
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};
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/*
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* Target mode version of the shared data SCB segment.
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*/
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struct target_data {
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uint8_t target_phases; /* Bitmap of phases to execute */
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uint8_t data_phase; /* Data-In or Data-Out */
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uint8_t scsi_status; /* SCSI status to give to initiator */
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uint8_t initiator_tag; /* Initiator's transaction tag */
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};
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struct hardware_scb {
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/*0*/ union {
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/*
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* If the cdb is 12 bytes or less, we embed it directly
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* in the SCB. For longer cdbs, we embed the address
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* of the cdb payload as seen by the chip and a DMA
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* is used to pull it in.
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*/
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uint8_t cdb[12];
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uint32_t cdb_ptr;
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struct status_pkt status;
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struct target_data tdata;
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} shared_data;
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/*
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* A word about residuals.
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* The scb is presented to the sequencer with the dataptr and datacnt
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* fields initialized to the contents of the first S/G element to
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* transfer. The sgptr field is initialized to the bus address for
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* the S/G element that follows the first in the in core S/G array
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* or'ed with the SG_FULL_RESID flag. Sgptr may point to an invalid
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* S/G entry for this transfer (single S/G element transfer with the
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* first elements address and length preloaded in the dataptr/datacnt
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* fields). If no transfer is to occur, sgptr is set to SG_LIST_NULL.
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* The SG_FULL_RESID flag ensures that the residual will be correctly
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* noted even if no data transfers occur. Once the data phase is entered,
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* the residual sgptr and datacnt are loaded from the sgptr and the
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* datacnt fields. After each S/G element's dataptr and length are
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* loaded into the hardware, the residual sgptr is advanced. After
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* each S/G element is expired, its datacnt field is checked to see
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* if the LAST_SEG flag is set. If so, SG_LIST_NULL is set in the
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* residual sg ptr and the transfer is considered complete. If the
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* sequencer determines that there is a residual in the tranfer, it
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* will set the SG_RESID_VALID flag in sgptr and dma the scb back into
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* host memory. To sumarize:
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*
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* Sequencer:
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* o A residual has occurred if SG_FULL_RESID is set in sgptr,
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* or residual_sgptr does not have SG_LIST_NULL set.
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*
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* o We are transfering the last segment if residual_datacnt has
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* the SG_LAST_SEG flag set.
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*
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* Host:
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* o A residual has occurred if a completed scb has the
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* SG_RESID_VALID flag set.
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*
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* o residual_sgptr and sgptr refer to the "next" sg entry
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* and so may point beyond the last valid sg entry for the
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* transfer.
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*/
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/*12*/ uint32_t dataptr;
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/*16*/ uint32_t datacnt; /*
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* Byte 3 (numbered from 0) of
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* the datacnt is really the
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* 4th byte in that data address.
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*/
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/*20*/ uint32_t sgptr;
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#define SG_PTR_MASK 0xFFFFFFF8
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/*24*/ uint8_t control; /* See SCB_CONTROL in aic7xxx.reg for details */
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/*25*/ uint8_t scsiid; /* what to load in the SCSIID register */
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/*26*/ uint8_t lun;
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/*27*/ uint8_t tag; /*
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* 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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/*28*/ uint8_t cdb_len;
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/*29*/ uint8_t scsirate; /* Value for SCSIRATE register */
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/*30*/ uint8_t scsioffset; /* Value for SCSIOFFSET register */
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/*31*/ uint8_t next; /*
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* Used for threading SCBs in the
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* "Waiting for Selection" and
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* "Disconnected SCB" lists down
|
|
* in the sequencer.
|
|
*/
|
|
/*32*/ uint8_t cdb32[32]; /*
|
|
* CDB storage for cdbs of size
|
|
* 13->32. We store them here
|
|
* because hardware scbs are
|
|
* allocated from DMA safe
|
|
* memory so we are guaranteed
|
|
* the controller can access
|
|
* this data.
|
|
*/
|
|
};
|
|
|
|
/************************ Kernel SCB Definitions ******************************/
|
|
/*
|
|
* Some fields of the SCB are OS dependent. Here we collect the
|
|
* definitions for elements that all OS platforms need to include
|
|
* in there SCB definition.
|
|
*/
|
|
|
|
/*
|
|
* Definition of a scatter/gather element as transfered to the controller.
|
|
* The aic7xxx chips only support a 24bit length. We use the top byte of
|
|
* the length to store additional address bits and a flag to indicate
|
|
* that a given segment terminates the transfer. This gives us an
|
|
* addressable range of 512GB on machines with 64bit PCI or with chips
|
|
* that can support dual address cycles on 32bit PCI busses.
|
|
*/
|
|
struct ahc_dma_seg {
|
|
uint32_t addr;
|
|
uint32_t len;
|
|
#define AHC_DMA_LAST_SEG 0x80000000
|
|
#define AHC_SG_HIGH_ADDR_MASK 0x7F000000
|
|
#define AHC_SG_LEN_MASK 0x00FFFFFF
|
|
};
|
|
|
|
/*
|
|
* The current state of this SCB.
|
|
*/
|
|
typedef enum {
|
|
SCB_FREE = 0x0000,
|
|
SCB_OTHERTCL_TIMEOUT = 0x0002,/*
|
|
* Another device was active
|
|
* during the first timeout for
|
|
* this SCB so we gave ourselves
|
|
* an additional timeout period
|
|
* in case it was hogging the
|
|
* bus.
|
|
*/
|
|
SCB_DEVICE_RESET = 0x0004,
|
|
SCB_SENSE = 0x0008,
|
|
SCB_RECOVERY_SCB = 0x0040,
|
|
SCB_NEGOTIATE = 0x0080,
|
|
SCB_ABORT = 0x1000,
|
|
SCB_UNTAGGEDQ = 0x2000,
|
|
SCB_ACTIVE = 0x4000,
|
|
SCB_TARGET_IMMEDIATE = 0x8000
|
|
} scb_flag;
|
|
|
|
struct scb {
|
|
struct hardware_scb *hscb;
|
|
union {
|
|
SLIST_ENTRY(scb) sle;
|
|
TAILQ_ENTRY(scb) tqe;
|
|
} links;
|
|
LIST_ENTRY(scb) pending_links;
|
|
ahc_io_ctx_t io_ctx;
|
|
struct ahc_softc *ahc_softc;
|
|
scb_flag flags;
|
|
#ifndef __linux__
|
|
bus_dmamap_t dmamap;
|
|
#endif
|
|
struct scb_platform_data *platform_data;
|
|
struct ahc_dma_seg *sg_list;
|
|
bus_addr_t sg_list_phys;
|
|
bus_addr_t cdb32_busaddr;
|
|
u_int sg_count;/* How full ahc_dma_seg is */
|
|
};
|
|
|
|
struct sg_map_node {
|
|
bus_dmamap_t sg_dmamap;
|
|
bus_addr_t sg_physaddr;
|
|
struct ahc_dma_seg* sg_vaddr;
|
|
SLIST_ENTRY(sg_map_node) links;
|
|
};
|
|
|
|
struct scb_data {
|
|
SLIST_HEAD(, scb) free_scbs; /*
|
|
* Pool of SCBs ready to be assigned
|
|
* commands to execute.
|
|
*/
|
|
struct scb *scbindex[AHC_SCB_MAX + 1];/* Mapping from tag to SCB */
|
|
struct hardware_scb *hscbs; /* Array of hardware SCBs */
|
|
struct scb *scbarray; /* Array of kernel SCBs */
|
|
struct scsi_sense_data *sense; /* Per SCB sense data */
|
|
|
|
/*
|
|
* "Bus" addresses of our data structures.
|
|
*/
|
|
bus_dma_tag_t hscb_dmat; /* dmat for our hardware SCB array */
|
|
bus_dmamap_t hscb_dmamap;
|
|
bus_addr_t hscb_busaddr;
|
|
bus_dma_tag_t sense_dmat;
|
|
bus_dmamap_t sense_dmamap;
|
|
bus_addr_t sense_busaddr;
|
|
bus_dma_tag_t sg_dmat; /* dmat for our sg segments */
|
|
SLIST_HEAD(, sg_map_node) sg_maps;
|
|
uint8_t numscbs;
|
|
uint8_t maxhscbs; /* Number of SCBs on the card */
|
|
uint8_t init_level; /*
|
|
* How far we've initialized
|
|
* this structure.
|
|
*/
|
|
};
|
|
|
|
/************************ Target Mode Definitions *****************************/
|
|
|
|
/*
|
|
* Connection desciptor for select-in requests in target mode.
|
|
*/
|
|
struct target_cmd {
|
|
uint8_t scsiid; /* Our ID and the initiator's ID */
|
|
uint8_t identify; /* Identify message */
|
|
uint8_t bytes[22]; /*
|
|
* Bytes contains any additional message
|
|
* bytes terminated by 0xFF. The remainder
|
|
* is the cdb to execute.
|
|
*/
|
|
uint8_t cmd_valid; /*
|
|
* When a command is complete, the firmware
|
|
* will set cmd_valid to all bits set.
|
|
* After the host has seen the command,
|
|
* the bits are cleared. This allows us
|
|
* to just peek at host memory to determine
|
|
* if more work is complete. cmd_valid is on
|
|
* an 8 byte boundary to simplify setting
|
|
* it on aic7880 hardware which only has
|
|
* limited direct access to the DMA FIFO.
|
|
*/
|
|
uint8_t pad[7];
|
|
};
|
|
|
|
/*
|
|
* Number of events we can buffer up if we run out
|
|
* of immediate notify ccbs.
|
|
*/
|
|
#define AHC_TMODE_EVENT_BUFFER_SIZE 8
|
|
struct ahc_tmode_event {
|
|
uint8_t initiator_id;
|
|
uint8_t event_type; /* MSG type or EVENT_TYPE_BUS_RESET */
|
|
#define EVENT_TYPE_BUS_RESET 0xFF
|
|
uint8_t event_arg;
|
|
};
|
|
|
|
/*
|
|
* Per enabled lun target mode state.
|
|
* As this state is directly influenced by the host OS'es target mode
|
|
* environment, we let the OS module define it. Forward declare the
|
|
* structure here so we can store arrays of them, etc. in OS neutral
|
|
* data structures.
|
|
*/
|
|
#ifdef AHC_TARGET_MODE
|
|
struct tmode_lstate {
|
|
struct cam_path *path;
|
|
struct ccb_hdr_slist accept_tios;
|
|
struct ccb_hdr_slist immed_notifies;
|
|
struct ahc_tmode_event event_buffer[AHC_TMODE_EVENT_BUFFER_SIZE];
|
|
uint8_t event_r_idx;
|
|
uint8_t event_w_idx;
|
|
};
|
|
#else
|
|
struct tmode_lstate;
|
|
#endif
|
|
|
|
/******************** Transfer Negotiation Datastructures *********************/
|
|
#define AHC_TRANS_CUR 0x01 /* Modify current neogtiation status */
|
|
#define AHC_TRANS_ACTIVE 0x03 /* Assume this target is on the bus */
|
|
#define AHC_TRANS_GOAL 0x04 /* Modify negotiation goal */
|
|
#define AHC_TRANS_USER 0x08 /* Modify user negotiation settings */
|
|
|
|
/*
|
|
* Transfer Negotiation Information.
|
|
*/
|
|
struct ahc_transinfo {
|
|
uint8_t protocol_version; /* SCSI Revision level */
|
|
uint8_t transport_version; /* SPI Revision level */
|
|
uint8_t width; /* Bus width */
|
|
uint8_t period; /* Sync rate factor */
|
|
uint8_t offset; /* Sync offset */
|
|
uint8_t ppr_options; /* Parallel Protocol Request options */
|
|
};
|
|
|
|
/*
|
|
* Per-initiator current, goal and user transfer negotiation information. */
|
|
struct ahc_initiator_tinfo {
|
|
uint8_t scsirate; /* Computed value for SCSIRATE reg */
|
|
struct ahc_transinfo current;
|
|
struct ahc_transinfo goal;
|
|
struct ahc_transinfo user;
|
|
};
|
|
|
|
/*
|
|
* Per enabled target ID state.
|
|
* Pointers to lun target state as well as sync/wide negotiation information
|
|
* for each initiator<->target mapping. For the initiator role we pretend
|
|
* that we are the target and the targets are the initiators since the
|
|
* negotiation is the same regardless of role.
|
|
*/
|
|
struct tmode_tstate {
|
|
struct tmode_lstate* enabled_luns[64]; /* NULL == disabled */
|
|
struct ahc_initiator_tinfo transinfo[16];
|
|
|
|
/*
|
|
* Per initiator state bitmasks.
|
|
*/
|
|
uint16_t ultraenb; /* Using ultra sync rate */
|
|
uint16_t discenable; /* Disconnection allowed */
|
|
uint16_t tagenable; /* Tagged Queuing allowed */
|
|
};
|
|
|
|
/*
|
|
* Data structure for our table of allowed synchronous transfer rates.
|
|
*/
|
|
struct ahc_syncrate {
|
|
u_int sxfr_u2; /* Value of the SXFR parameter for Ultra2+ Chips */
|
|
u_int sxfr; /* Value of the SXFR parameter for <= Ultra Chips */
|
|
#define ULTRA_SXFR 0x100 /* Rate Requires Ultra Mode set */
|
|
#define ST_SXFR 0x010 /* Rate Single Transition Only */
|
|
#define DT_SXFR 0x040 /* Rate Double Transition Only */
|
|
uint8_t period; /* Period to send to SCSI target */
|
|
char *rate;
|
|
};
|
|
|
|
/*
|
|
* The synchronouse transfer rate table.
|
|
*/
|
|
extern struct ahc_syncrate ahc_syncrates[];
|
|
|
|
/*
|
|
* Indexes into our table of syncronous transfer rates.
|
|
*/
|
|
#define AHC_SYNCRATE_DT 0
|
|
#define AHC_SYNCRATE_ULTRA2 1
|
|
#define AHC_SYNCRATE_ULTRA 3
|
|
#define AHC_SYNCRATE_FAST 6
|
|
|
|
/***************************** Lookup Tables **********************************/
|
|
/*
|
|
* Textual descriptions of the different chips indexed by chip type.
|
|
*/
|
|
extern char *ahc_chip_names[];
|
|
extern const u_int num_chip_names;
|
|
|
|
/*
|
|
* Hardware error codes.
|
|
*/
|
|
struct hard_error_entry {
|
|
uint8_t errno;
|
|
char *errmesg;
|
|
};
|
|
extern struct hard_error_entry hard_error[];
|
|
extern const u_int num_errors;
|
|
|
|
/*
|
|
* Phase -> name and message out response
|
|
* to parity errors in each phase table.
|
|
*/
|
|
struct phase_table_entry {
|
|
uint8_t phase;
|
|
uint8_t mesg_out; /* Message response to parity errors */
|
|
char *phasemsg;
|
|
};
|
|
extern struct phase_table_entry phase_table[];
|
|
extern const u_int num_phases;
|
|
|
|
/************************** Serial EEPROM Format ******************************/
|
|
|
|
struct seeprom_config {
|
|
/*
|
|
* Per SCSI ID Configuration Flags
|
|
*/
|
|
uint16_t device_flags[16]; /* words 0-15 */
|
|
#define CFXFER 0x0007 /* synchronous transfer rate */
|
|
#define CFSYNCH 0x0008 /* enable synchronous transfer */
|
|
#define CFDISC 0x0010 /* enable disconnection */
|
|
#define CFWIDEB 0x0020 /* wide bus device */
|
|
#define CFSYNCHISULTRA 0x0040 /* CFSYNCH is an ultra offset (2940AU)*/
|
|
#define CFSYNCSINGLE 0x0080 /* Single-Transition signalling */
|
|
#define CFSTART 0x0100 /* send start unit SCSI command */
|
|
#define CFINCBIOS 0x0200 /* include in BIOS scan */
|
|
#define CFRNFOUND 0x0400 /* report even if not found */
|
|
#define CFMULTILUNDEV 0x0800 /* Probe multiple luns in BIOS scan */
|
|
#define CFWBCACHEENB 0x4000 /* Enable W-Behind Cache on disks */
|
|
#define CFWBCACHENOP 0xc000 /* Don't touch W-Behind Cache */
|
|
|
|
/*
|
|
* BIOS Control Bits
|
|
*/
|
|
uint16_t bios_control; /* word 16 */
|
|
#define CFSUPREM 0x0001 /* support all removeable drives */
|
|
#define CFSUPREMB 0x0002 /* support removeable boot drives */
|
|
#define CFBIOSEN 0x0004 /* BIOS enabled */
|
|
/* UNUSED 0x0008 */
|
|
#define CFSM2DRV 0x0010 /* support more than two drives */
|
|
#define CF284XEXTEND 0x0020 /* extended translation (284x cards) */
|
|
#define CFSTPWLEVEL 0x0010 /* Termination level control */
|
|
#define CFEXTEND 0x0080 /* extended translation enabled */
|
|
#define CFSCAMEN 0x0100 /* SCAM enable */
|
|
/* UNUSED 0xff00 */
|
|
|
|
/*
|
|
* Host Adapter Control Bits
|
|
*/
|
|
uint16_t adapter_control; /* word 17 */
|
|
#define CFAUTOTERM 0x0001 /* Perform Auto termination */
|
|
#define CFULTRAEN 0x0002 /* Ultra SCSI speed enable */
|
|
#define CF284XSELTO 0x0003 /* Selection timeout (284x cards) */
|
|
#define CF284XFIFO 0x000C /* FIFO Threshold (284x cards) */
|
|
#define CFSTERM 0x0004 /* SCSI low byte termination */
|
|
#define CFWSTERM 0x0008 /* SCSI high byte termination */
|
|
#define CFSPARITY 0x0010 /* SCSI parity */
|
|
#define CF284XSTERM 0x0020 /* SCSI low byte term (284x cards) */
|
|
#define CFMULTILUN 0x0020 /* SCSI low byte term (284x cards) */
|
|
#define CFRESETB 0x0040 /* reset SCSI bus at boot */
|
|
#define CFCLUSTERENB 0x0080 /* Cluster Enable */
|
|
#define CFCHNLBPRIMARY 0x0100 /* aic7895 probe B channel first */
|
|
#define CFSEAUTOTERM 0x0400 /* Ultra2 Perform secondary Auto Term*/
|
|
#define CFSELOWTERM 0x0800 /* Ultra2 secondary low term */
|
|
#define CFSEHIGHTERM 0x1000 /* Ultra2 secondary high term */
|
|
#define CFDOMAINVAL 0x4000 /* Perform Domain Validation*/
|
|
|
|
/*
|
|
* Bus Release Time, Host Adapter ID
|
|
*/
|
|
uint16_t brtime_id; /* word 18 */
|
|
#define CFSCSIID 0x000f /* host adapter SCSI ID */
|
|
/* UNUSED 0x00f0 */
|
|
#define CFBRTIME 0xff00 /* bus release time */
|
|
|
|
/*
|
|
* Maximum targets
|
|
*/
|
|
uint16_t max_targets; /* word 19 */
|
|
#define CFMAXTARG 0x00ff /* maximum targets */
|
|
#define CFBOOTLUN 0x0f00 /* Lun to boot from */
|
|
#define CFBOOTID 0xf000 /* Target to boot from */
|
|
uint16_t res_1[10]; /* words 20-29 */
|
|
uint16_t signature; /* Signature == 0x250 */
|
|
#define CFSIGNATURE 0x250
|
|
uint16_t checksum; /* word 31 */
|
|
};
|
|
|
|
/**************************** Message Buffer *********************************/
|
|
typedef enum {
|
|
MSG_TYPE_NONE = 0x00,
|
|
MSG_TYPE_INITIATOR_MSGOUT = 0x01,
|
|
MSG_TYPE_INITIATOR_MSGIN = 0x02,
|
|
MSG_TYPE_TARGET_MSGOUT = 0x03,
|
|
MSG_TYPE_TARGET_MSGIN = 0x04
|
|
} ahc_msg_type;
|
|
|
|
typedef enum {
|
|
MSGLOOP_IN_PROG,
|
|
MSGLOOP_MSGCOMPLETE,
|
|
MSGLOOP_TERMINATED
|
|
} msg_loop_stat;
|
|
|
|
/*********************** Software Configuration Structure *********************/
|
|
TAILQ_HEAD(scb_tailq, scb);
|
|
|
|
struct ahc_softc {
|
|
bus_space_tag_t tag;
|
|
bus_space_handle_t bsh;
|
|
#ifndef __linux__
|
|
bus_dma_tag_t buffer_dmat; /* dmat for buffer I/O */
|
|
#endif
|
|
struct scb_data *scb_data;
|
|
|
|
struct scb *next_queued_scb;
|
|
|
|
/*
|
|
* SCBs that have been sent to the controller
|
|
*/
|
|
LIST_HEAD(, scb) pending_scbs;
|
|
|
|
/*
|
|
* Counting lock for deferring the release of additional
|
|
* untagged transactions from the untagged_queues. When
|
|
* the lock is decremented to 0, all queues in the
|
|
* untagged_queues array are run.
|
|
*/
|
|
u_int untagged_queue_lock;
|
|
|
|
/*
|
|
* Per-target queue of untagged-transactions. The
|
|
* transaction at the head of the queue is the
|
|
* currently pending untagged transaction for the
|
|
* target. The driver only allows a single untagged
|
|
* transaction per target.
|
|
*/
|
|
struct scb_tailq untagged_queues[16];
|
|
|
|
/*
|
|
* Platform specific data.
|
|
*/
|
|
struct ahc_platform_data *platform_data;
|
|
|
|
/*
|
|
* Platform specific device information.
|
|
*/
|
|
ahc_dev_softc_t dev_softc;
|
|
|
|
/*
|
|
* Target mode related state kept on a per enabled lun basis.
|
|
* Targets that are not enabled will have null entries.
|
|
* As an initiator, we keep one target entry for our initiator
|
|
* ID to store our sync/wide transfer settings.
|
|
*/
|
|
struct tmode_tstate* enabled_targets[16];
|
|
|
|
/*
|
|
* The black hole device responsible for handling requests for
|
|
* disabled luns on enabled targets.
|
|
*/
|
|
struct tmode_lstate* black_hole;
|
|
|
|
/*
|
|
* Device instance currently on the bus awaiting a continue TIO
|
|
* for a command that was not given the disconnect priveledge.
|
|
*/
|
|
struct tmode_lstate* pending_device;
|
|
|
|
/*
|
|
* Card characteristics
|
|
*/
|
|
ahc_chip chip;
|
|
ahc_feature features;
|
|
ahc_bug bugs;
|
|
ahc_flag flags;
|
|
|
|
/* Values to store in the SEQCTL register for pause and unpause */
|
|
uint8_t unpause;
|
|
uint8_t pause;
|
|
|
|
/* Command Queues */
|
|
uint8_t qoutfifonext;
|
|
uint8_t qinfifonext;
|
|
uint8_t *qoutfifo;
|
|
uint8_t *qinfifo;
|
|
|
|
/* Critical Section Data */
|
|
struct cs *critical_sections;
|
|
u_int num_critical_sections;
|
|
|
|
/* Links for chaining softcs */
|
|
TAILQ_ENTRY(ahc_softc) links;
|
|
|
|
/* Channel Names ('A', 'B', etc.) */
|
|
char channel;
|
|
char channel_b;
|
|
|
|
/* Initiator Bus ID */
|
|
uint8_t our_id;
|
|
uint8_t our_id_b;
|
|
|
|
/* Targets that need negotiation messages */
|
|
uint16_t targ_msg_req;
|
|
|
|
/*
|
|
* PCI error detection.
|
|
*/
|
|
int unsolicited_ints;
|
|
|
|
/*
|
|
* Target incoming command FIFO.
|
|
*/
|
|
struct target_cmd *targetcmds;
|
|
uint8_t tqinfifonext;
|
|
|
|
/*
|
|
* Incoming and outgoing message handling.
|
|
*/
|
|
uint8_t send_msg_perror;
|
|
ahc_msg_type msg_type;
|
|
uint8_t msgout_buf[12];/* Message we are sending */
|
|
uint8_t msgin_buf[12];/* Message we are receiving */
|
|
u_int msgout_len; /* Length of message to send */
|
|
u_int msgout_index; /* Current index in msgout */
|
|
u_int msgin_index; /* Current index in msgin */
|
|
|
|
/*
|
|
* Mapping information for data structures shared
|
|
* between the sequencer and kernel.
|
|
*/
|
|
bus_dma_tag_t parent_dmat;
|
|
bus_dma_tag_t shared_data_dmat;
|
|
bus_dmamap_t shared_data_dmamap;
|
|
bus_addr_t shared_data_busaddr;
|
|
|
|
/*
|
|
* Bus address of the one byte buffer used to
|
|
* work-around a DMA bug for chips <= aic7880
|
|
* in target mode.
|
|
*/
|
|
bus_addr_t dma_bug_buf;
|
|
|
|
/* Number of enabled target mode device on this card */
|
|
u_int enabled_luns;
|
|
|
|
/* Initialization level of this data structure */
|
|
u_int init_level;
|
|
|
|
/* PCI cacheline size. */
|
|
u_int pci_cachesize;
|
|
|
|
/* Per-Unit descriptive information */
|
|
const char *description;
|
|
char *name;
|
|
int unit;
|
|
|
|
uint16_t user_discenable;/* Disconnection allowed */
|
|
uint16_t user_tagenable;/* Tagged Queuing allowed */
|
|
};
|
|
|
|
TAILQ_HEAD(ahc_softc_tailq, ahc_softc);
|
|
extern struct ahc_softc_tailq ahc_tailq;
|
|
|
|
/************************ Active Device Information ***************************/
|
|
typedef enum {
|
|
ROLE_UNKNOWN,
|
|
ROLE_INITIATOR,
|
|
ROLE_TARGET
|
|
} role_t;
|
|
|
|
struct ahc_devinfo {
|
|
int our_scsiid;
|
|
int target_offset;
|
|
uint16_t target_mask;
|
|
u_int target;
|
|
u_int lun;
|
|
char channel;
|
|
role_t role; /*
|
|
* Only guaranteed to be correct if not
|
|
* in the busfree state.
|
|
*/
|
|
};
|
|
|
|
/****************************** PCI Structures ********************************/
|
|
typedef int (ahc_device_setup_t)(ahc_dev_softc_t,
|
|
struct ahc_probe_config *);
|
|
|
|
struct ahc_pci_identity {
|
|
uint64_t full_id;
|
|
uint64_t id_mask;
|
|
char *name;
|
|
ahc_device_setup_t *setup;
|
|
};
|
|
extern struct ahc_pci_identity ahc_pci_ident_table [];
|
|
extern const int ahc_num_pci_devs;
|
|
|
|
/***************************** VL/EISA Declarations ***************************/
|
|
struct aic7770_identity {
|
|
uint32_t full_id;
|
|
uint32_t id_mask;
|
|
char *name;
|
|
ahc_device_setup_t *setup;
|
|
};
|
|
extern struct aic7770_identity aic7770_ident_table [];
|
|
extern const int ahc_num_aic7770_devs;
|
|
|
|
#define AHC_EISA_SLOT_OFFSET 0xc00
|
|
#define AHC_EISA_IOSIZE 0x100
|
|
|
|
/*************************** Function Declarations ****************************/
|
|
/******************************************************************************/
|
|
|
|
/***************************** PCI Front End *********************************/
|
|
struct ahc_pci_identity *ahc_find_pci_device(ahc_dev_softc_t);
|
|
int ahc_pci_config(struct ahc_softc *,
|
|
struct ahc_pci_identity *);
|
|
|
|
/*************************** EISA/VL Front End ********************************/
|
|
struct aic7770_identity *aic7770_find_device(uint32_t);
|
|
int aic7770_config(struct ahc_softc *ahc,
|
|
struct aic7770_identity *);
|
|
|
|
/************************** SCB and SCB queue management **********************/
|
|
int ahc_probe_scbs(struct ahc_softc *);
|
|
void ahc_run_untagged_queues(struct ahc_softc *ahc);
|
|
void ahc_run_untagged_queue(struct ahc_softc *ahc,
|
|
struct scb_tailq *queue);
|
|
void ahc_qinfifo_requeue(struct ahc_softc *ahc,
|
|
struct scb *prev_scb,
|
|
struct scb *scb);
|
|
int ahc_qinfifo_count(struct ahc_softc *ahc);
|
|
|
|
/****************************** Initialization ********************************/
|
|
void ahc_init_probe_config(struct ahc_probe_config *);
|
|
struct ahc_softc *ahc_alloc(void *platform_arg, char *name);
|
|
int ahc_softc_init(struct ahc_softc *,
|
|
struct ahc_probe_config*);
|
|
void ahc_controller_info(struct ahc_softc *ahc, char *buf);
|
|
int ahc_init(struct ahc_softc *ahc);
|
|
void ahc_softc_insert(struct ahc_softc *);
|
|
void ahc_set_unit(struct ahc_softc *, int);
|
|
void ahc_set_name(struct ahc_softc *, char *);
|
|
void ahc_alloc_scbs(struct ahc_softc *ahc);
|
|
void ahc_free(struct ahc_softc *ahc);
|
|
int ahc_reset(struct ahc_softc *ahc);
|
|
void ahc_shutdown(void *arg);
|
|
|
|
/*************************** Interrupt Services *******************************/
|
|
void ahc_pci_intr(struct ahc_softc *ahc);
|
|
void ahc_clear_intstat(struct ahc_softc *ahc);
|
|
void ahc_run_qoutfifo(struct ahc_softc *ahc);
|
|
#ifdef AHC_TARGET_MODE
|
|
void ahc_run_tqinfifo(struct ahc_softc *ahc, int paused);
|
|
#endif
|
|
void ahc_handle_brkadrint(struct ahc_softc *ahc);
|
|
void ahc_handle_seqint(struct ahc_softc *ahc, u_int intstat);
|
|
void ahc_handle_scsiint(struct ahc_softc *ahc,
|
|
u_int intstat);
|
|
void ahc_clear_critical_section(struct ahc_softc *ahc);
|
|
|
|
/***************************** Error Recovery *********************************/
|
|
typedef enum {
|
|
SEARCH_COMPLETE,
|
|
SEARCH_COUNT,
|
|
SEARCH_REMOVE
|
|
} ahc_search_action;
|
|
int ahc_search_qinfifo(struct ahc_softc *ahc, int target,
|
|
char channel, int lun, u_int tag,
|
|
role_t role, uint32_t status,
|
|
ahc_search_action action);
|
|
int ahc_search_disc_list(struct ahc_softc *ahc, int target,
|
|
char channel, int lun, u_int tag,
|
|
int stop_on_first, int remove,
|
|
int save_state);
|
|
void ahc_freeze_devq(struct ahc_softc *ahc, struct scb *scb);
|
|
int ahc_reset_channel(struct ahc_softc *ahc, char channel,
|
|
int initiate_reset);
|
|
void restart_sequencer(struct ahc_softc *ahc);
|
|
/*************************** Utility Functions ********************************/
|
|
void ahc_compile_devinfo(struct ahc_devinfo *devinfo,
|
|
u_int our_id, u_int target,
|
|
u_int lun, char channel,
|
|
role_t role);
|
|
/************************** Transfer Negotiation ******************************/
|
|
struct ahc_syncrate* ahc_find_syncrate(struct ahc_softc *ahc, u_int *period,
|
|
u_int *ppr_options, u_int maxsync);
|
|
u_int ahc_find_period(struct ahc_softc *ahc,
|
|
u_int scsirate, u_int maxsync);
|
|
void ahc_validate_offset(struct ahc_softc *ahc,
|
|
struct ahc_syncrate *syncrate,
|
|
u_int *offset, int wide);
|
|
void ahc_validate_width(struct ahc_softc *ahc,
|
|
u_int *bus_width);
|
|
void ahc_set_width(struct ahc_softc *ahc,
|
|
struct ahc_devinfo *devinfo,
|
|
u_int width, u_int type, int paused);
|
|
void ahc_set_syncrate(struct ahc_softc *ahc,
|
|
struct ahc_devinfo *devinfo,
|
|
struct ahc_syncrate *syncrate,
|
|
u_int period, u_int offset,
|
|
u_int ppr_options,
|
|
u_int type, int paused);
|
|
void ahc_set_tags(struct ahc_softc *ahc,
|
|
struct ahc_devinfo *devinfo, int enable);
|
|
|
|
/**************************** Target Mode *************************************/
|
|
#ifdef AHC_TARGET_MODE
|
|
void ahc_send_lstate_events(struct ahc_softc *,
|
|
struct tmode_lstate *);
|
|
void ahc_handle_en_lun(struct ahc_softc *ahc,
|
|
struct cam_sim *sim, union ccb *ccb);
|
|
cam_status ahc_find_tmode_devs(struct ahc_softc *ahc,
|
|
struct cam_sim *sim, union ccb *ccb,
|
|
struct tmode_tstate **tstate,
|
|
struct tmode_lstate **lstate,
|
|
int notfound_failure);
|
|
void ahc_setup_target_msgin(struct ahc_softc *ahc,
|
|
struct ahc_devinfo *devinfo);
|
|
#endif
|
|
/******************************* Debug ***************************************/
|
|
void ahc_print_scb(struct scb *scb);
|
|
void ahc_dump_card_state(struct ahc_softc *ahc);
|
|
#endif /* _AIC7XXX_H_ */
|