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NetBSD/sys/dev/ic/isp_tpublic.h

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/* $NetBSD: isp_tpublic.h,v 1.15 2007/05/24 21:30:43 mjacob Exp $ */
/*
* Copyright (c) 1997-2006 by Matthew Jacob
* 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.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY 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 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.
*/
/*
* Host Adapter Public Target Interface Structures && Routines
*/
#ifndef _ISP_TPUBLIC_H
#define _ISP_TPUBLIC_H 1
/*
* Action codes set by the MD target driver for
* the external layer to figure out what to do with.
*/
typedef enum {
QOUT_HBA_REG=0, /* the argument is a pointer to a hba_register_t */
QOUT_ENABLE, /* the argument is a pointer to a enadis_t */
QOUT_DISABLE, /* the argument is a pointer to a enadis_t */
QOUT_TMD_START, /* the argument is a pointer to a tmd_cmd_t */
QOUT_TMD_DONE, /* the argument is a pointer to a tmd_cmd_t */
QOUT_NOTIFY, /* the argument is a pointer to a tmd_notify_t */
QOUT_HBA_UNREG /* the argument is a pointer to a hba_register_t */
} tact_e;
/*
* Action codes set by the external layer for the
* MD driver to figure out what to do with.
*/
typedef enum {
QIN_HBA_REG=99, /* the argument is a pointer to a hba_register_t */
QIN_GETINFO, /* the argument is a pointer to a info_t */
QIN_SETINFO, /* the argument is a pointer to a info_t */
QIN_GETDLIST, /* the argument is a pointer to a fc_dlist_t */
QIN_ENABLE, /* the argument is a pointer to a enadis_t */
QIN_DISABLE, /* the argument is a pointer to a enadis_t */
QIN_TMD_CONT, /* the argument is a pointer to a tmd_cmd_t */
QIN_TMD_FIN, /* the argument is a pointer to a tmd_cmd_t */
QIN_NOTIFY_ACK, /* the argument is a pointer to a tmd_notify_t */
QIN_HBA_UNREG, /* the argument is a pointer to a hba_register_t */
} qact_e;
/*
* This structure is used to register to other software modules the
* binding of an HBA identifier, driver name and instance and the
* lun width capapbilities of this target driver. It's up to each
* platform to figure out how it wants to do this, but a typical
* sequence would be for the MD layer to find some external module's
* entry point and start by sending a QOUT_HBA_REG with info filled
* in, and the external module to call back with a QIN_HBA_REG that
* passes back the corresponding information.
*/
#define QR_VERSION 16
typedef struct {
/* NB: tags from here to r_version must never change */
void * r_identity;
void (*r_action)(qact_e, void *);
char r_name[8];
int r_inst;
int r_version;
uint32_t r_locator;
uint32_t r_nchannels;
enum { R_FC, R_SPI } r_type;
void * r_private;
} hba_register_t;
/*
* An information structure that is used to get or set per-channel transport layer parameters.
*/
typedef struct {
void * i_identity;
enum { I_FC, I_SPI } i_type;
int i_channel;
int i_error;
union {
struct {
uint64_t wwnn_nvram;
uint64_t wwpn_nvram;
uint64_t wwnn;
uint64_t wwpn;
} fc;
struct {
int iid;
} spi;
} i_id;
} info_t;
/*
* An information structure to return a list of logged in WWPNs. FC specific.
*/
typedef struct {
void * d_identity;
int d_channel;
int d_error;
int d_count;
uint64_t * d_wwpns;
} fc_dlist_t;
/*
* Notify structure
*/
typedef enum {
NT_ABORT_TASK=0x1000,
NT_ABORT_TASK_SET,
NT_CLEAR_ACA,
NT_CLEAR_TASK_SET,
NT_LUN_RESET,
NT_TARGET_RESET,
NT_BUS_RESET,
NT_LIP_RESET,
NT_LINK_UP,
NT_LINK_DOWN,
NT_LOGOUT,
NT_HBA_RESET
} tmd_ncode_t;
typedef struct tmd_notify {
void * nt_hba; /* HBA tag */
uint64_t nt_iid; /* inititator id */
uint64_t nt_tgt; /* target id */
uint16_t nt_lun; /* logical unit */
uint16_t : 15,
nt_need_ack : 1; /* this notify needs an ACK */
uint64_t nt_tagval; /* tag value */
uint32_t nt_channel; /* channel id */
tmd_ncode_t nt_ncode; /* action */
void * nt_lreserved;
void * nt_hreserved;
} tmd_notify_t;
#define LUN_ANY 0xffff
#define TGT_ANY ((uint64_t) -1)
#define INI_ANY ((uint64_t) -1)
#define TAG_ANY ((uint64_t) 0)
#define MATCH_TMD(tmd, iid, lun, tag) \
( \
(tmd) && \
(iid == INI_ANY || iid == tmd->cd_iid) && \
(lun == LUN_ANY || lun == tmd->cd_lun) && \
(tag == TAG_ANY || tag == tmd->cd_tagval) \
)
/*
* A word about ENABLE/DISABLE: the argument is a pointer to a enadis_t
* with en_hba, en_iid, en_chan, en_tgt and en_lun filled out.
*
* If an error occurs in either enabling or disabling the described lun
* cd_error is set with an appropriate non-zero value.
*/
typedef struct {
void * en_private; /* for outer layer usage */
void * en_hba; /* HBA tag */
uint64_t en_iid; /* initiator ID */
uint64_t en_tgt; /* target id */
uint16_t en_lun; /* logical unit */
uint16_t en_chan; /* channel on card */
int en_error;
} enadis_t;
/*
* Suggested Software Target Mode Command Handling structure.
*
* A note about terminology:
*
* MD stands for "Machine Dependent".
*
* This driver is structured in three layers: Outer MD, core, and inner MD.
* The latter also is bus dependent (i.e., is cognizant of PCI bus issues
* as well as platform issues).
*
*
* "Outer Layer" means "Other Module"
*
* Some additional module that actually implements SCSI target command
* policy is the recipient of incoming commands and the source of the
* disposition for them.
*
* The command structure below is one suggested possible MD command structure,
* but since the handling of thbis is entirely in the MD layer, there is
* no explicit or implicit requirement that it be used.
*
* The cd_private tag should be used by the MD layer to keep a free list
* of these structures. Code outside of this driver can then use this
* to identify it's own unit structures. That is, when not on the MD
* layer's freelist, the MD layer should shove into it the identifier
* that the outer layer has for it- passed in on an initial QIN_HBA_REG
* call (see below).
*
* The cd_hba tag is a tag that uniquely identifies the HBA this target
* mode command is coming from. The outer layer has to pass this back
* unchanged to avoid chaos.
*
* The cd_iid, cd_tgt, cd_lun and cd_port tags are used to identify the
* id of the initiator who sent us a command, the target claim to be, the
* lun on the target we claim to be, and the port instance (for multiple
* port host adapters) that this applies to (consider it an extra port
* parameter). The iid, tgt and lun values are deliberately chosen to be
* fat so that, for example, World Wide Names can be used instead of
* the units that the firmware uses (in the case where the MD
* layer maintains a port database, for example).
*
* The cd_tagtype field specifies what kind of command tag type, if
* any, has been sent with the command. Note that the Outer Layer
* still needs to pass the tag handle through unchanged even
* if the tag type is CD_UNTAGGED.
*
* The cd_cdb contains storage for the passed in command descriptor block.
* There is no need to define length as the callee should be able to
* figure this out.
*
* The tag cd_lflags are the flags set by the MD driver when it gets
* command incoming or when it needs to inform any outside entities
* that the last requested action failed.
*
* The tag cd_hflags should be set by any outside software to indicate
* the validity of sense and status fields (defined below) and to indicate
* the direction data is expected to move. It is an error to have both
* CDFH_DATA_IN and CDFH_DATA_OUT set.
*
* If the CDFH_STSVALID flag is set, the command should be completed (after
* sending any data and/or status). If CDFH_SNSVALID is set and the MD layer
* can also handle sending the associated sense data (either back with an
* FCP RESPONSE IU for Fibre Channel or otherwise automatically handling a
* REQUEST SENSE from the initator for this target/lun), the MD layer will
* set the CDFL_SENTSENSE flag on successful transmission of the sense data.
* It is an error for the CDFH_SNSVALID bit to be set and CDFH_STSVALID not
* to be set. It is an error for the CDFH_SNSVALID be set and the associated
* SCSI status (cd_scsi_status) not be set to CHECK CONDITON.
*
* The tag cd_data points to a data segment to either be filled or
* read from depending on the direction of data movement. The tag
* is undefined if no data direction is set. The MD layer and outer
* layers must agree on the meaning of cd_data and it is specifically
* not defined here.
*
* The tag cd_totlen is the total data amount expected to be moved
* over the life of the command. It may be set by the MD layer, possibly
* from the datalen field of an FCP CMND IU unit. If it shows up in the outer
* layers set to zero and the CDB indicates data should be moved, the outer
* layer should set it to the amount expected to be moved.
*
* The tag cd_resid should be the total residual of data not transferred.
* The outer layers need to set this at the begining of command processing
* to equal cd_totlen. As data is successfully moved, this value is decreased.
* At the end of a command, any nonzero residual indicates the number of bytes
* requested by the command but not moved.
*
* The tag cd_xfrlen is the length of the currently active data transfer.
* This allows several interations between any outside software and the
* MD layer to move data.
*
* The reason that total length and total residual have to be tracked
* is to keep track of relative offset.
*
* The tags cd_sense and cd_scsi_status are pretty obvious.
*
* The tag cd_error is to communicate between the MD layer and outer software
* the current error conditions.
*
* The tag cd_lreserved, cd_hreserved are scratch areas for use for the MD
* and outer layers respectively.
*
*/
#ifndef TMD_CDBLEN
#define TMD_CDBLEN 16
#endif
#ifndef TMD_SENSELEN
#define TMD_SENSELEN 18
#endif
#ifndef QCDS
#define QCDS (sizeof (void *))
#endif
typedef struct tmd_cmd {
void * cd_private; /* private data pointer */
void * cd_hba; /* HBA tag */
void * cd_data; /* 'pointer' to data */
uint64_t cd_iid; /* initiator ID */
uint64_t cd_tgt; /* target id */
uint8_t cd_lun[8]; /* logical unit */
uint64_t cd_tagval; /* tag value */
uint32_t cd_channel; /* channel index */
uint32_t cd_lflags; /* flags lower level sets */
uint32_t cd_hflags; /* flags higher level sets */
uint32_t cd_totlen; /* total data load */
uint32_t cd_resid; /* total data residual */
uint32_t cd_xfrlen; /* current data load */
int32_t cd_error; /* current error */
uint8_t cd_tagtype; /* tag type */
uint8_t cd_scsi_status;
uint8_t cd_sense[TMD_SENSELEN];
uint8_t cd_cdb[TMD_CDBLEN];
union {
void * ptrs[QCDS / sizeof (void *)];
uint64_t llongs[QCDS / sizeof (uint64_t)];
uint32_t longs[QCDS / sizeof (uint32_t)];
uint16_t shorts[QCDS / sizeof (uint16_t)];
uint8_t bytes[QCDS];
} cd_lreserved[4], cd_hreserved[4];
} tmd_cmd_t;
/* defined tags */
#define CD_UNTAGGED 0
#define CD_SIMPLE_TAG 1
#define CD_ORDERED_TAG 2
#define CD_HEAD_TAG 3
#define CD_ACA_TAG 4
#ifndef TMD_SIZE
#define TMD_SIZE (sizeof (tmd_cmd_t))
#endif
#define L0LUN_TO_FLATLUN(lptr) ((((lptr)[0] & 0x3f) << 8) | ((lptr)[1]))
#define FLATLUN_TO_L0LUN(lptr, lun) \
(lptr)[1] = lun & 0xff; \
if (sizeof (lun) == 1) { \
(lptr)[0] = 0; \
} else { \
uint16_t nl = lun; \
if (nl == LUN_ANY) { \
(lptr)[0] = (nl >> 8) & 0xff; \
} else if (nl < 256) { \
(lptr)[0] = 0; \
} else { \
(lptr)[0] = 0x40 | ((nl >> 8) & 0x3f); \
} \
} \
memset(&(lptr)[2], 0, 6)
/*
* Note that NODISC (obviously) doesn't apply to non-SPI transport.
*
* Note that knowing the data direction and lengh at the time of receipt of
* a command from the initiator is a feature only of Fibre Channel.
*
* The CDFL_BIDIR is in anticipation of the adoption of some newer
* features required by OSD.
*
* The principle selector for MD layer to know whether data is to
* be transferred in any QOUT_TMD_CONT call is cd_xfrlen- the
* flags CDFH_DATA_IN and CDFH_DATA_OUT define which direction.
*/
#define CDFL_SNSVALID 0x01 /* sense data (from f/w) good */
#define CDFL_SENTSTATUS 0x02 /* last action sent status */
#define CDFL_DATA_IN 0x04 /* target (us) -> initiator (them) */
#define CDFL_DATA_OUT 0x08 /* initiator (them) -> target (us) */
#define CDFL_BIDIR 0x0C /* bidirectional data */
#define CDFL_ERROR 0x10 /* last action ended in error */
#define CDFL_NODISC 0x20 /* disconnects disabled */
#define CDFL_SENTSENSE 0x40 /* last action sent sense data */
#define CDFL_BUSY 0x80 /* this command is not on a free list */
#define CDFL_PRIVATE 0xFF000000 /* private layer flags */
#define CDFH_SNSVALID 0x01 /* sense data (from outer layer) good */
#define CDFH_STSVALID 0x02 /* status valid */
#define CDFH_DATA_IN 0x04 /* target (us) -> initiator (them) */
#define CDFH_DATA_OUT 0x08 /* initiator (them) -> target (us) */
#define CDFH_DATA_MASK 0x0C /* mask to cover data direction */
#define CDFH_PRIVATE 0xFF000000 /* private layer flags */
/*
* A word about the START/CONT/DONE/FIN dance:
*
* When the HBA is enabled for receiving commands, one may show up
* without notice. When that happens, the MD target mode driver
* gets a tmd_cmd_t, fills it with the info that just arrived, and
* calls the outer layer with a QOUT_TMD_START code and pointer to
* the tmd_cmd_t.
*
* The outer layer decodes the command, fetches data, prepares stuff,
* whatever, and starts by passing back the pointer with a QIN_TMD_CONT
* code which causes the MD target mode driver to generate CTIOs to
* satisfy whatever action needs to be taken. When those CTIOs complete,
* the MD target driver sends the pointer to the cmd_tmd_t back with
* a QOUT_TMD_DONE code. This repeats for as long as necessary. These
* may not be done in parallel- they are sequential operations.
*
* The outer layer signals it wants to end the command by settings within
* the tmd_cmd_t itself. When the final QIN_TMD_CONT is reported completed,
* the outer layer frees the tmd_cmd_t by sending the pointer to it
* back with a QIN_TMD_FIN code.
*
* The graph looks like:
*
* QOUT_TMD_START -> [ QIN_TMD_CONT -> QOUT_TMD_DONE ] * -> QIN_TMD_FIN.
*
*/
/*
* Target handler functions.
*
* The MD target handler function (the outer layer calls this)
* should be be prototyped like:
*
* void target_action(qact_e, void *arg)
*
* The outer layer target handler function (the MD layer calls this)
* should be be prototyped like:
*
* void scsi_target_handler(tact_e, void *arg)
*/
#endif /* _ISP_TPUBLIC_H */
/*
* vim:ts=4:sw=4:expandtab
*/
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