/* $NetBSD: isp_tpublic.h,v 1.19 2010/01/03 02:47:09 mjacob Exp $ */ /*- * Copyright (c) 1997-2008 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 */ /* * A note about terminology: * * "Inner Layer" means this driver (isp and the isp_tpublic API). * * This module includes the both generic and platform specific pieces. * * "Outer Layer" means another (external) module. * * This is an additional module that actually implements SCSI target command * decode and is the recipient of incoming commands and the source of the * disposition for them. */ #ifndef _ISP_TPUBLIC_H #define _ISP_TPUBLIC_H 1 /* * Include general target definitions */ #include "isp_target.h" /* * Action codes set by the Inner Layer for the outer 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_xact_t */ QOUT_NOTIFY, /* the argument is a pointer to a notify_t */ QOUT_HBA_UNREG /* the argument is a pointer to a hba_register_t */ } tact_e; /* * Action codes set by the outer layer for the * inner layer 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_xact_t */ QIN_TMD_FIN, /* the argument is a pointer to a tmd_cmd_t */ QIN_NOTIFY_ACK, /* the argument is a pointer to a notify_t */ QIN_HBA_UNREG, /* the argument is a pointer to a hba_register_t */ } qact_e; /* * This structure is used to register to the outer layer the * binding of an HBA identifier, driver name and instance and the * lun width capapbilities of this inner layer. It's up to each * platform to figure out how it wants to actually implement this. * 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. * * The r_version tag defines the version of this API. */ #define QR_VERSION 20 typedef struct { /* NB: structure 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; /* * Lun ENABLE/DISABLE * * A word about ENABLE/DISABLE: the argument is a pointer to a enadis_t * with en_hba, en_chan and en_lun filled out. We used to have an iid * and target pair, but this just gets silly so we made initiator id * and target id something you set, once, elsewhere. * * If an error occurs in either enabling or disabling the described lun * en_error is set with an appropriate non-zero value. */ typedef struct { void * en_private; /* for outer layer usage */ void * en_hba; /* HBA tag */ uint16_t en_lun; /* logical unit */ uint16_t en_chan; /* channel on card */ int en_error; } enadis_t; /* * Data Transaction * * A tmd_xact_t is a structure used to describe a transaction within * an overall command. It used to be part of the overall command, * but it became desirable to allow for multiple simultaneous * transfers for a command to happen. Generally these structures * define data to be moved (along with the relative offset within * the overall command) with the last structure containing status * and sense (if needed) as well. * * The td_cmd tag points back to the owning command. * * The td_data tag points to the (platform specific) data descriptor. * * The td_lprivate is for use by the Inner Layer for private usage. * * The td_xfrlen says whether this transaction is moving data- if nonzero. * * The td_offset states what the relative offset within the comamnd the * data transfer will start at. It is undefined if td_xfrlen is zero. * * The td_error flag will note any errors that occurred during an attempt * to start this transaction. The inner layer is responsible for setting * this. * * The td_hflags tag is set by the outer layer to indicate how the inner * layer is supposed to treat this transaction. * * The td_lflags tag is set by the inner layer to indicate whether this * transaction sent status and/or sense. Note that (much as it hurts), * this API allows the inner layer to *fail* to send sense even if asked * to- that is, AUTOSENSE is not a requirement of this API and the outer * layer has to be prepared for this (unlikely) eventuality. */ typedef struct tmd_cmd tmd_cmd_t; typedef struct tmd_xact { tmd_cmd_t * td_cmd; /* cross-ref to tmd_cmd_t */ void * td_data; /* data descriptor */ void * td_lprivate; /* private for lower layer */ uint32_t td_xfrlen; /* size of this data load */ uint32_t td_offset; /* offset for this data load */ int td_error; /* error with this transfer */ uint8_t td_hflags; /* flags set by caller */ uint8_t td_lflags; /* flags set by callee */ } tmd_xact_t; #define TDFH_STSVALID 0x01 /* status is valid - include it */ #define TDFH_SNSVALID 0x02 /* sense data (from outer layer) good - include it */ #define TDFH_DATA_IN 0x04 /* target (us) -> initiator (them) */ #define TDFH_DATA_OUT 0x08 /* initiator (them) -> target (us) */ #define TDFH_DATA_MASK 0x0C /* mask to cover data direction */ #define TDFH_PRIVATE 0xF0 /* private outer layer usage */ #define TDFL_SENTSTATUS 0x01 /* this transaction sent status */ #define TDFL_SENTSENSE 0x02 /* this transaction sent sense data */ #define TDFL_ERROR 0x04 /* this transaction had an error */ #define TDFL_SYNCERROR 0x08 /* ... and didn't even start because of it */ #define TDFL_PRIVATE 0xF0 /* private inner layer usage */ /* * The command structure below the SCSI Command structure that is * is the whole point of this API. After a LUN is (or LUNS are) * enabled, initiators who send commands addressed to the port, * channel and lun that have been enabled cause an interrupt which * causes the chip to receive the command and present it to the * inner layer. The inner layer allocates one of this command * structures and copies relevant information to it and sends it * to the outer layer with the action QOUT_TMD_START. * * The outer layer is then responsible for command decode and is responsible * for sending any transactions back (via a QIN_TMD_CONT) to the inner layer * that (optionally) moves data and then sends closing status. * * The outer layer, when informed of the status of the final transaction * then releases this structure by sending it back to the inner layer * with the action QOUT_TMD_FIN. * * The structure tag meanings are as described 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. It is identical to the r_identity tag used * by the inner layer to register with the outer layer. * * The cd_iid, cd_channel, cd_tgt and cd_lun tags are used to identify the * the initiator who sent us a command, the channel on the this particular * hardware port we arrived on (for multiple channel devices), the target we * claim to be, and the lun on that target. * * The cd_tagval field is a tag that uniquely describes this tag. It may * or may not have any correspondence to an underying hardware tag. The * outer layer must pass this back unchanged or chaos will result. * * The tag cd_totlen is the total data amount expected to be moved * for this command. This will be set to non-zero for transports * that know this value from the transport level (e.g., Fibre Channel). * If it shows up in the outer layers set to zero, the total data length * must be inferred from the CDB. * * The tag cd_moved is the total amount of data moved so far. It is the * responsibilty of the inner layer to set this for every transaction and * to keep track of it so that transport level residuals may be correctly * set. * * The cd_cdb contains storage for the passed in SCSI command. * * The cd_tagtype field specifies what kind of command tag type, if * any, has been sent with this command. * * The tag cd_flags has some junk flags set but mostly has flags reserved for outer layer use. * * The tags cd_sense and cd_scsi_status are self-explanatory. * * The cd_xact tag is the first or only transaction structure related to this command. * * The tag cd_lreserved, cd_hreserved are scratch areas for use for the outer and inner layers respectively. * */ #ifndef TMD_CDBLEN #define TMD_CDBLEN 16 #endif #ifndef TMD_SENSELEN #define TMD_SENSELEN 18 #endif #ifndef QCDS #define QCDS (sizeof (uint64_t)) #endif #ifndef TMD_PRIV_LO #define TMD_PRIV_LO 4 #endif #ifndef TMD_PRIV_HI #define TMD_PRIV_HI 4 #endif struct tmd_cmd { void * cd_hba; /* HBA tag */ uint64_t cd_iid; /* initiator ID */ uint64_t cd_tgt; /* target id */ uint64_t cd_tagval; /* tag value */ uint8_t cd_lun[8]; /* logical unit */ uint32_t cd_totlen; /* total data load */ uint32_t cd_moved; /* total data moved so far */ uint16_t cd_channel; /* channel index */ uint16_t cd_flags; /* flags */ uint16_t cd_req_cnt; /* how many tmd_xact_t's are active */ uint8_t cd_cdb[TMD_CDBLEN]; uint8_t cd_tagtype; /* tag type */ uint8_t cd_scsi_status; uint8_t cd_sense[TMD_SENSELEN]; tmd_xact_t cd_xact; /* first or only transaction */ union { void * ptrs[QCDS / sizeof (void *)]; /* (assume) one pointer */ uint64_t llongs[QCDS / sizeof (uint64_t)]; /* one long long */ uint32_t longs[QCDS / sizeof (uint32_t)]; /* two longs */ uint16_t shorts[QCDS / sizeof (uint16_t)]; /* four shorts */ uint8_t bytes[QCDS]; /* eight bytes */ } cd_lreserved[TMD_PRIV_LO], cd_hreserved[TMD_PRIV_HI]; }; #define CDF_NODISC 0x0001 /* disconnects disabled */ #define CDF_DATA_IN 0x0002 /* target (us) -> initiator (them) */ #define CDF_DATA_OUT 0x0004 /* initiator (them) -> target (us) */ #define CDF_BIDIR 0x0006 /* bidirectional data */ #define CDF_SNSVALID 0x0008 /* sense is set on incoming command */ #define CDF_PRIVATE 0xff00 /* available for private use in outer layer */ /* 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) /* * Inner Layer Handler Function. * * The inner layer target handler function (the outer layer calls this) * should be be prototyped like so: * * void target_action(qact_e, void *arg) * * The outer layer target handler function (the inner 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 */