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freebsd-skq/sys/dev/aic7xxx/aic7xxx.h
Justin T. Gibbs 957790c3e6 ahc_pci.c: 
Disable "cache line streaming" for aic7890/91 Rev A chips.  I
	have never seen these chips fail using this feature, but
	some of Adaptec's regression tests have.

	Explicitly set "cache line streaming" to on for aic7896/97
	chips.  This was happening before, but this documents the
	fact that these chips will not function correctly without
	CACHETHEEN set.

aic7xxx.h:
	Add new bug types.

	Fix a typo in a comment.

aic7xxx.reg:
	Add a definition for the SHVALID bit in SSTAT3 for Ultra2/3
	chips.  This bit inicates whether the bottom most (current)
	element in the S/G fifo has exhausted its data count.

aic7xxx.seq:
	Be more careful in how we turn off the secondary DMA channel.
	Being less careful may hang the PCI bus arbitor that negotiates
	between the two DMA engines.

	Remove an unecessary and incorrect flag set operation in
	the overrun case.

	On Ultra2/3 controllers, clear the dma FIFO before starting
	to handle an overrun.  We don't want any residual bytes from
	the beginning of the overrun to cause the code that shuts
	down the DMA engine from hanging because the FIFO is not
	(and never will be) empty.

	If the data fifo is empty by the time we notice that a
	read transaction has completed, there is no need to
	hit the flush bit on aic7890/91 hardware that will not
	perform an auto-flush.  Skip some cycles by short circuiting
	the manual flush code in this case.

	When transitioning out of data phase, make sure that we
	have the next S/G element loaded for the following
	reconnect if there is more work to do.  The code
	would do this in most cases before, but there was
	a small window where the current S/G element could
	be exhausted before our fetch of the next S/G element
	completed.  Since the S/G fetch is already initiated
	at this point, it makes sense to just wait for the
	segment to arrive instead of incuring even more latency
	by canceling the fetch and initiating it later.

	Fast path the end of data phase handling for the last
	S/G segment.   In the general case, we might have
	worked ahead a bit by stuffing the S/G FIFO with
	additional segments.  If we stop before using them
	all, we need to fixup our location in the S/G stream.
	Since we can't work past the last S/G segment, no
	fixups are ever required if we stop somewhere in
	that final segment.

	Fix a little buglet in the target mode dma bug handler.
	We were employing the workaround in all cases instead
	of only for the chips that require it.

	Fix the cause of SCB timeouts and possible "lost data"
	during read operations on the aic7890.  When sending
	a data on any Ultra2/3 controller, the final segment
	must be marked as such so the FIFO will be flushed and
	cleaned up correctly when the transfer is ended.  We
	failed to do this for the CDB transfer and so, if
	the target immediately transfered from command to data
	phase without an intervening disconnection, the first
	segment transferred would be any residual bytes from
	the cdb transfer.  The Ultra160 controllers for some
	reason were not affected by this problem.

Many Thanks to Tor Egge for bringing the aic7890 problem
to my attention, providing analysis, as well as a mechanism
to reproduce the problem.
2000-07-27 23:17:52 +00:00

828 lines
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/*
* Interface to the generic driver for the aic7xxx based adaptec
* SCSI controllers. This is used to implement product specific
* probe and attach routines.
*
* Copyright (c) 1994, 1995, 1996, 1997, 1998, 1999, 2000 Justin T. Gibbs.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU Public License ("GPL").
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _AIC7XXX_H_
#define _AIC7XXX_H_
#include "opt_aic7xxx.h" /* for config options */
#include "aic7xxx_reg.h"
#include <sys/bus.h> /* For device_t */
#ifndef MAX
#define MAX(a,b) (((a) > (b)) ? (a) : (b))
#endif
#ifndef MIN
#define MIN(a,b) (((a) < (b)) ? (a) : (b))
#endif
/*
* The maximum number of supported targets.
*/
#define AHC_NUM_TARGETS 16
/*
* The maximum number of supported luns.
* The identify message supports up to 64 luns in SPI3.
*/
#define AHC_NUM_LUNS 64
/*
* The maximum transfer per S/G segment.
*/
#define AHC_MAXTRANSFER_SIZE 0x00ffffff /* limited by 24bit counter */
/*
* The number of dma segments supported. The sequencer can handle any number
* of physically contiguous S/G entrys. To reduce the driver's memory
* consumption, we limit the number supported to be sufficient to handle
* the largest mapping supported by the kernel, MAXPHYS. Assuming the
* transfer is as fragmented as possible and unaligned, this turns out to
* be the number of paged sized transfers in MAXPHYS plus an extra element
* to handle any unaligned residual. The sequencer fetches SG elements
* in 128 byte chucks, so make the number per-transaction a nice multiple
* of 16 (8 byte S/G elements).
*/
/* XXX Worth the space??? */
#define AHC_NSEG (roundup(btoc(MAXPHYS) + 1, 16))
#define AHC_SCB_MAX 255 /*
* Up to 255 SCBs on some types of aic7xxx
* based boards. The aic7870 have 16 internal
* SCBs, but external SRAM bumps this to 255.
* The aic7770 family have only 4, and the
* aic7850 has only 3.
*/
#define AHC_TMODE_CMDS 256 /*
* Ring Buffer of incoming target commands.
* We allocate 256 to simplify the logic
* in the sequencer by using the natural
* wrap point of an 8bit counter.
*/
/*
* The aic7xxx chips only support a 24bit length. We use the top
* byte of the length to store additional address bits as well
* as an indicator if this is the last SG segment in a 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 chip order is from least sophisticated to most sophisticated */
typedef enum {
AHC_NONE = 0x0000,
AHC_CHIPID_MASK = 0x00FF,
AHC_AIC7770 = 0x0001,
AHC_AIC7850 = 0x0002,
AHC_AIC7855 = 0x0003,
AHC_AIC7859 = 0x0004,
AHC_AIC7860 = 0x0005,
AHC_AIC7870 = 0x0006,
AHC_AIC7880 = 0x0007,
AHC_AIC7895 = 0x0008,
AHC_AIC7890 = 0x0009,
AHC_AIC7896 = 0x000a,
AHC_AIC7892 = 0x000b,
AHC_AIC7899 = 0x000c,
AHC_VL = 0x0100, /* Bus type VL */
AHC_EISA = 0x0200, /* Bus type EISA */
AHC_PCI = 0x0400, /* Bus type PCI */
AHC_BUS_MASK = 0x0F00
} ahc_chip;
extern char *ahc_chip_names[];
typedef enum {
AHC_FENONE = 0x0000,
AHC_ULTRA = 0x0001, /* Supports 20MHz Transfers */
AHC_ULTRA2 = 0x0002, /* Supports 40MHz Transfers */
AHC_WIDE = 0x0004, /* Wide Channel */
AHC_TWIN = 0x0008, /* Twin Channel */
AHC_MORE_SRAM = 0x0010, /* 80 bytes instead of 64 */
AHC_CMD_CHAN = 0x0020, /* Has a Command DMA Channel */
AHC_QUEUE_REGS = 0x0040, /* Has Queue management registers */
AHC_SG_PRELOAD = 0x0080, /* Can perform auto-SG preload */
AHC_SPIOCAP = 0x0100, /* Has a Serial Port I/O Cap Register */
AHC_MULTI_TID = 0x0200, /* Has bitmask of TIDs for select-in */
AHC_HS_MAILBOX = 0x0400, /* Has HS_MAILBOX register */
AHC_DT = 0x0800, /* Double Transition transfers */
AHC_NEW_TERMCTL = 0x1000,
AHC_MULTI_FUNC = 0x2000, /* Multi-Function Twin Channel Device */
AHC_LARGE_SCBS = 0x4000, /* 64byte SCBs */
AHC_AIC7770_FE = AHC_FENONE,
AHC_AIC7850_FE = AHC_SPIOCAP,
AHC_AIC7855_FE = AHC_AIC7850_FE,
AHC_AIC7859_FE = AHC_AIC7850_FE|AHC_ULTRA,
AHC_AIC7860_FE = AHC_AIC7859_FE,
AHC_AIC7870_FE = AHC_FENONE,
AHC_AIC7880_FE = AHC_ULTRA,
AHC_AIC7890_FE = AHC_MORE_SRAM|AHC_CMD_CHAN|AHC_ULTRA2|AHC_QUEUE_REGS
|AHC_SG_PRELOAD|AHC_MULTI_TID|AHC_HS_MAILBOX
|AHC_NEW_TERMCTL|AHC_LARGE_SCBS,
AHC_AIC7892_FE = AHC_AIC7890_FE|AHC_DT,
AHC_AIC7895_FE = AHC_AIC7880_FE|AHC_MORE_SRAM
|AHC_CMD_CHAN|AHC_MULTI_FUNC|AHC_LARGE_SCBS,
AHC_AIC7895C_FE = AHC_AIC7895_FE|AHC_MULTI_TID,
AHC_AIC7896_FE = AHC_AIC7890_FE|AHC_MULTI_FUNC,
AHC_AIC7899_FE = AHC_AIC7892_FE|AHC_MULTI_FUNC
} ahc_feature;
typedef enum {
AHC_BUGNONE = 0x00,
/*
* On all chips prior to the U2 product line,
* the WIDEODD S/G segment feature does not
* work during scsi->HostBus transfers.
*/
AHC_TMODE_WIDEODD_BUG = 0x01,
/*
* On the aic7890/91 Rev 0 chips, the autoflush
* feature does not work. A manual flush of
* the DMA FIFO is required.
*/
AHC_AUTOFLUSH_BUG = 0x02,
/*
* On the aic7890/91 Rev 0 chips, cacheline
* streaming does not work.
*/
AHC_CACHETHEN_BUG = 0x04,
/*
* On the aic7896/97 chips, cacheline
* streaming must be enabled.
*/
AHC_CACHETHEN_DIS_BUG = 0x08
} ahc_bug;
typedef enum {
AHC_FNONE = 0x000,
AHC_PAGESCBS = 0x001,/* Enable SCB paging */
AHC_CHANNEL_B_PRIMARY = 0x002,/*
* On twin channel adapters, probe
* channel B first since it is the
* primary bus.
*/
AHC_USEDEFAULTS = 0x004,/*
* For cards without an seeprom
* or a BIOS to initialize the chip's
* SRAM, we use the default target
* settings.
*/
AHC_SHARED_SRAM = 0x010,
AHC_LARGE_SEEPROM = 0x020,/* Uses C56_66 not C46 */
AHC_RESET_BUS_A = 0x040,
AHC_RESET_BUS_B = 0x080,
AHC_EXTENDED_TRANS_A = 0x100,
AHC_EXTENDED_TRANS_B = 0x200,
AHC_TERM_ENB_A = 0x400,
AHC_TERM_ENB_B = 0x800,
AHC_INITIATORMODE = 0x1000,/*
* Allow initiator operations on
* this controller.
*/
AHC_TARGETMODE = 0x2000,/*
* Allow target operations on this
* controller.
*/
AHC_NEWEEPROM_FMT = 0x4000,
AHC_RESOURCE_SHORTAGE = 0x8000,
AHC_TQINFIFO_BLOCKED = 0x10000,/* Blocked waiting for ATIOs */
AHC_INT50_SPEEDFLEX = 0x20000,/*
* Internal 50pin connector
* sits behind an aic3860
*/
AHC_SCB_BTT = 0x40000 /*
* The busy targets table is
* stored in SCB space rather
* than SRAM.
*/
} ahc_flag;
struct ahc_probe_config {
const char *description;
char channel;
char channel_b;
ahc_chip chip;
ahc_feature features;
ahc_bug bugs;
ahc_flag flags;
};
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_QUEUED_MSG = 0x2000,
SCB_ACTIVE = 0x4000,
SCB_TARGET_IMMEDIATE = 0x8000
} scb_flag;
/*
* The driver keeps up to MAX_SCB scb structures per card in memory. The SCB
* consists of a "hardware SCB" mirroring the fields availible on the card
* and additional information the kernel stores for each transaction.
*
* To minimize space utilization, a portion of the hardware scb stores
* different data during different portions of a SCSI transaction.
* As initialized by the host driver for the initiator role, this area
* contains the SCSI cdb (or pointer to the cdb) to be executed. After
* the cdb has been presented to the target, this area serves to store
* residual transfer information and the SCSI status byte.
* For the target role, the contents of this area do not change, but
* still serve a different purpose than for the initiator role. See
* struct target_data for details.
*/
struct status_pkt {
uint32_t residual_datacnt;
uint32_t residual_sg_ptr;
uint8_t scsi_status;
};
struct target_data {
uint8_t target_phases;
uint8_t data_phase;
uint8_t scsi_status;
uint8_t initiator_tag;
};
struct hardware_scb {
/*0*/ uint8_t control;
/*1*/ uint8_t scsiid; /* what to load in the SCSIID register */
/*2*/ uint8_t lun;
/*3*/ uint8_t cdb_len;
/*4*/ union {
/*
* 12 bytes of cdb information only
* used on chips with 32byte SCBs.
*/
uint8_t cdb[12];
uint32_t cdb_ptr;
struct status_pkt status;
struct target_data tdata;
} shared_data;
/*
* A word about residuals. The scb is presented to the sequencer with
* the dataptr and datacnt fields initialized to the contents of the
* first S/G element to transfer. The sgptr field is initialized to
* the bus address for the S/G element that follows the first in the
* in core S/G array or'ed with the SG_FULL_RESID flag. Sgptr may point
* to an invalid S/G entry for this transfer. If no transfer is to occur,
* sgptr is set to SG_LIST_NULL. The SG_FULL_RESID flag insures that
* the residual will be correctly noted even if no data transfers occur.
* Once the data phase is entered, the residual sgptr and datacnt are
* loaded from the sgptr and the datacnt fields. After each S/G element's
* dataptr and length are loaded into the hardware, the residual sgptr
* is advanced. After each S/G element is expired, its datacnt field
* is checked to see if the LAST_SEG flag is set. If so, SG_LIST_NULL
* is set in the residual sg ptr and the transfer is considered complete.
* If the sequencer determines that three is a residual in the tranfer,
* it will set the SG_RESID_VALID flag in sgptr and dma the scb back into
* host memory. To sumarize:
*
* Sequencer:
* o A residual has occurred if SG_FULL_RESID is set in sgptr,
* or residual_sgptr does not have SG_LIST_NULL set.
*
* o We are transfering the last segment if residual_datacnt has
* the SG_LAST_SEG flag set.
*
* Host:
* o A residual has occurred if a completed scb has the
* SG_RESID_VALID flag set.
*
* o residual_sgptr and sgptr refer to the "next" sg entry
* and so may point beyond the last valid sg entry for the
* transfer.
*/
/*16*/ uint32_t dataptr;
/*20*/ uint32_t datacnt; /*
* The highest address byte is
* really the 5th. byte in the
* dataptr.
*/
/*24*/ uint32_t sgptr;
#define SG_PTR_MASK 0xFFFFFFF8
/*28*/ uint8_t tag; /* Index into our kernel SCB array.
* Also used as the tag for tagged I/O
*/
/*29*/ uint8_t scsirate; /* Value for SCSIRATE register */
/*30*/ uint8_t scsioffset; /* Value for SCSIOFFSET register */
/*31*/ uint8_t next; /* Used for threading SCBs in the
* "Waiting for Selection" and
* "Disconnected SCB" lists down
* in the sequencer.
*/
/*32*/ uint8_t cdb32[32]; /*
* CDB storage for controllers
* supporting 64 byte SCBs.
*/
};
struct scb {
struct hardware_scb *hscb;
union {
SLIST_ENTRY(scb) sle;
TAILQ_ENTRY(scb) tqe;
} links;
union ccb *ccb; /* the ccb for this cmd */
scb_flag flags;
bus_dmamap_t dmamap;
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 */
};
/*
* Connection desciptor for select-in requests in target mode.
* The first byte is the connecting target, followed by identify
* message and optional tag information, terminated by 0xFF. The
* remainder is the command to execute. The cmd_valid byte is on
* an 8 byte boundary to simplify setting it on aic7880 hardware
* which only has limited direct access to the DMA FIFO.
*/
struct target_cmd {
uint8_t scsiid;
uint8_t identify; /* Identify message */
uint8_t bytes[22];
uint8_t cmd_valid;
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 lun target mode state including accept TIO CCB
* and immediate notify CCB pools.
*/
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;
};
#define AHC_TRANS_CUR 0x01 /* Modify current neogtiation status */
#define AHC_TRANS_ACTIVE 0x03 /* Assume this is the active target */
#define AHC_TRANS_GOAL 0x04 /* Modify negotiation goal */
#define AHC_TRANS_USER 0x08 /* Modify user negotiation settings */
struct ahc_transinfo {
uint8_t protocol_version;
uint8_t transport_version;
uint8_t width;
uint8_t period;
uint8_t offset;
uint8_t ppr_options;
};
struct ahc_initiator_tinfo {
uint8_t scsirate;
struct ahc_transinfo current;
struct ahc_transinfo goal;
struct ahc_transinfo user;
};
/*
* Per target mode enabled target state. Esentially just an array of
* pointers to lun target state as well as sync/wide negotiation information
* for each initiator<->target mapping (including the mapping for when we
* are the initiator).
*/
struct tmode_tstate {
struct tmode_lstate* enabled_luns[64];
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 */
};
/*
* Define the format of the aic7XXX SEEPROM registers (16 bits).
*/
struct seeprom_config {
/*
* 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, 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 */
};
struct ahc_syncrate {
u_int sxfr_u2;
u_int sxfr;
/* Rates in Ultra mode have bit 8 of sxfr set */
#define ULTRA_SXFR 0x100
#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;
};
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;
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 {
struct hardware_scb *hscbs; /* Array of hardware SCBs */
struct scb *scbarray; /* Array of kernel SCBs */
SLIST_HEAD(, scb) free_scbs; /*
* Pool of SCBs ready to be assigned
* commands to execute.
*/
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.
*/
};
TAILQ_HEAD(scb_tailq, scb);
struct ahc_softc {
bus_space_tag_t tag;
bus_space_handle_t bsh;
bus_dma_tag_t buffer_dmat; /* dmat for buffer I/O */
struct scb_data *scb_data;
/*
* CCBs that have been sent to the controller
*/
LIST_HEAD(, ccb_hdr) pending_ccbs;
/*
* 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];
/*
* 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;
/*
* Hooks into the XPT.
*/
struct cam_sim *sim;
struct cam_sim *sim_b;
struct cam_path *path;
struct cam_path *path_b;
int unit;
/* 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 and data for running the
* PCI error interrupt handler.
*/
int unsolicited_ints;
device_t device;
/*
* 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[8]; /* Message we are sending */
uint8_t msgin_buf[8]; /* 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 */
int regs_res_type;
int regs_res_id;
int irq_res_type;
struct resource *regs;
struct resource *irq;
void *ih;
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_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;
uint16_t user_discenable;/* Disconnection allowed */
uint16_t user_tagenable;/* Tagged Queuing allowed */
};
struct full_ahc_softc {
struct ahc_softc softc;
struct scb_data scb_data_storage;
};
/* #define AHC_DEBUG */
#ifdef AHC_DEBUG
/* Different debugging levels used when AHC_DEBUG is defined */
#define AHC_SHOWMISC 0x0001
#define AHC_SHOWCMDS 0x0002
#define AHC_SHOWSCBS 0x0004
#define AHC_SHOWABORTS 0x0008
#define AHC_SHOWSENSE 0x0010
#define AHC_SHOWSCBCNT 0x0020
extern int ahc_debug; /* Initialized in i386/scsi/aic7xxx.c */
#endif
#define ahc_inb(ahc, port) \
bus_space_read_1((ahc)->tag, (ahc)->bsh, port)
#define ahc_outb(ahc, port, value) \
bus_space_write_1((ahc)->tag, (ahc)->bsh, port, value)
#define ahc_outsb(ahc, port, valp, count) \
bus_space_write_multi_1((ahc)->tag, (ahc)->bsh, port, valp, count)
#define ahc_insb(ahc, port, valp, count) \
bus_space_read_multi_1((ahc)->tag, (ahc)->bsh, port, valp, count)
char *ahc_name(struct ahc_softc *ahc);
void ahc_init_probe_config(struct ahc_probe_config *config);
struct ahc_softc*
ahc_alloc(device_t dev, struct resource *regs, int regs_type,
int regs_id, bus_dma_tag_t parent_dmat,
struct ahc_probe_config *config, struct scb_data *scb_data);
int ahc_reset(struct ahc_softc *ahc);
void ahc_free(struct ahc_softc *);
int ahc_probe_scbs(struct ahc_softc *);
int ahc_init(struct ahc_softc *);
int ahc_attach(struct ahc_softc *);
void ahc_intr(void *arg);
static __inline int sequencer_paused(struct ahc_softc *ahc);
static __inline void ahc_pause_bug_fix(struct ahc_softc *ahc);
static __inline void pause_sequencer(struct ahc_softc *ahc);
static __inline void unpause_sequencer(struct ahc_softc *ahc);
static __inline void
ahc_pause_bug_fix(struct ahc_softc *ahc)
{
/*
* Clear the CIOBUS stretch signal by reading a register that will
* set this signal and deassert it. Without this workaround, if
* the chip is paused, by an interrupt or manual pause, while
* accessing scb ram, then accesses to certain registers will hang
* the system (infinite pci retries).
*/
if ((ahc->features & AHC_ULTRA2) != 0)
(void)ahc_inb(ahc, CCSCBCTL);
}
static __inline int
sequencer_paused(struct ahc_softc *ahc)
{
return ((ahc_inb(ahc, HCNTRL) & PAUSE) != 0);
}
static __inline void
pause_sequencer(struct ahc_softc *ahc)
{
ahc_outb(ahc, HCNTRL, ahc->pause);
/*
* Since the sequencer can disable pausing in a critical section, we
* must loop until it actually stops.
*/
while (sequencer_paused(ahc) == 0)
;
ahc_pause_bug_fix(ahc);
}
static __inline void
unpause_sequencer(struct ahc_softc *ahc)
{
if ((ahc_inb(ahc, INTSTAT) & (SCSIINT | SEQINT | BRKADRINT)) == 0)
ahc_outb(ahc, HCNTRL, ahc->unpause);
}
#endif /* _AIC7XXX_H_ */
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