0e5f60747c
Handle errors reported through immediate notify ccbs. This includes bus resets, BDR messages, and abort messages. Properly setup CA conditions for errors such as uncorectable parity in data phases, reselection failure, and IDE message received. Add a mechanism for stalling the queue of transactions to a particular initiator while a CA is in progress. Since we don't yet support tagged I/O, this is largely just for show right now. Properly bzero our softc at init time (oops). Add more documentation on what all of the queues in our softc do.
126 lines
4.1 KiB
C
126 lines
4.1 KiB
C
/*
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* Ioctl definitions for the Target Mode SCSI Proccessor Target driver for CAM.
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*
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* Copyright (c) 1998 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, immediately at the beginning of the file.
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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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* 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: scsi_targetio.h,v 1.2 1999/03/05 23:25:11 gibbs Exp $
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*/
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#ifndef _CAM_SCSI_SCSI_TARGETIO_H_
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#define _CAM_SCSI_SCSI_TARGETIO_H_
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#ifndef KERNEL
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#include <sys/types.h>
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#endif
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#include <sys/ioccom.h>
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#include <cam/cam.h>
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#include <cam/cam_ccb.h>
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TAILQ_HEAD(ccb_queue, ccb_hdr);
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/* Determine and clear exception state in the driver */
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typedef enum {
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TARG_EXCEPT_NONE = 0x00,
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TARG_EXCEPT_DEVICE_INVALID = 0x01,
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TARG_EXCEPT_BDR_RECEIVED = 0x02,
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TARG_EXCEPT_BUS_RESET_SEEN = 0x04,
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TARG_EXCEPT_ABORT_SEEN = 0x08,
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TARG_EXCEPT_ABORT_TAG_SEEN = 0x10,
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TARG_EXCEPT_UNKNOWN_ATIO = 0x80
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} targ_exception;
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#define TARGIOCFETCHEXCEPTION _IOR('C', 1, targ_exception)
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#define TARGIOCCLEAREXCEPTION _IOW('C', 2, targ_exception)
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/*
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* Retreive an Accept Target I/O CCB for a command that is not handled
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* directly by the kernel target driver.
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*/
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#define TARGIOCFETCHATIO _IOR('C', 3, struct ccb_accept_tio)
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/*
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* Used for responding to incoming ATIO requests. XPT_CONTINUE_TARG_IO
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* operations are the norm, but ccb types for manipulating the device
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* queue, etc. can also be used if error handling is to be performed by the
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* user land process.
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*/
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#define TARGIOCCOMMAND _IOWR('C', 4, union ccb)
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typedef enum {
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UA_NONE = 0x00,
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UA_POWER_ON = 0x01,
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UA_BUS_RESET = 0x02,
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UA_BDR = 0x04
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} ua_types;
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typedef enum {
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CA_NONE = 0x00,
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CA_UNIT_ATTN = 0x01,
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CA_CMD_SENSE = 0x02
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} ca_types;
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struct initiator_state {
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ua_types pending_ua;
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ca_types pending_ca;
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struct scsi_sense_data sense_data;
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struct ccb_queue held_queue;
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};
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struct ioc_initiator_state {
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u_int initiator_id;
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struct initiator_state istate;
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};
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/*
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* Get and Set Contingent Allegiance and Unit Attention state
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* presented by the target driver. This is usually used to
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* properly report and error condition in response to an incoming
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* ATIO request handled by the userland process.
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*
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* The initiator_id must be properly initialized in the ioc_initiator_state
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* structure before calling TARGIOCGETISTATE.
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*/
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#define TARGIOCGETISTATE _IOWR('C', 6, struct ioc_initiator_state)
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#define TARGIOCSETISTATE _IOW('C', 5, struct ioc_initiator_state)
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struct ioc_alloc_unit {
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path_id_t path_id;
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target_id_t target_id;
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lun_id_t lun_id;
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u_int unit;
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};
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/*
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* Allocate and Free a target mode instance. For allocation, the path_id,
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* target_id, and lun_id fields must be set. On successful completion
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* of the ioctl, the unit field will indicate the unit number of the
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* newly created instance. For de-allocation, all fields must match
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* an instance in the inactive (i.e. closed) state.
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*/
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#define TARGCTLIOALLOCUNIT _IOWR('C', 7, struct ioc_alloc_unit)
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#define TARGCTLIOFREEUNIT _IOW('C', 8, struct ioc_alloc_unit)
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#endif /* _CAM_SCSI_SCSI_TARGETIO_H_ */
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