bec9534d1d
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
592 lines
17 KiB
C
592 lines
17 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2003 Silicon Graphics International Corp.
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* Copyright (c) 2014-2015 Alexander Motin <mav@FreeBSD.org>
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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. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*
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* $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_io.h#5 $
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* $FreeBSD$
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*/
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/*
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* CAM Target Layer data movement structures/interface.
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*
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* Author: Ken Merry <ken@FreeBSD.org>
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*/
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#ifndef _CTL_IO_H_
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#define _CTL_IO_H_
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#define CTL_MAX_CDBLEN 32
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/*
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* Uncomment this next line to enable printing out times for I/Os
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* that take longer than CTL_TIME_IO_SECS seconds to get to the datamove
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* and/or done stage.
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*/
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#define CTL_TIME_IO
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#ifdef CTL_TIME_IO
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#define CTL_TIME_IO_DEFAULT_SECS 90
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#endif
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/*
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* Uncomment this next line to enable the CTL I/O delay feature. You
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* can delay I/O at two different points -- datamove and done. This is
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* useful for diagnosing abort conditions (for hosts that send an abort on a
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* timeout), and for determining how long a host's timeout is.
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*/
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//#define CTL_IO_DELAY
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typedef enum {
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CTL_STATUS_NONE, /* No status */
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CTL_SUCCESS, /* Transaction completed successfully */
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CTL_CMD_TIMEOUT, /* Command timed out, shouldn't happen here */
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CTL_SEL_TIMEOUT, /* Selection timeout, shouldn't happen here */
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CTL_ERROR, /* General CTL error XXX expand on this? */
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CTL_SCSI_ERROR, /* SCSI error, look at status byte/sense data */
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CTL_CMD_ABORTED, /* Command aborted, don't return status */
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CTL_STATUS_MASK = 0xfff,/* Mask off any status flags */
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CTL_AUTOSENSE = 0x1000 /* Autosense performed */
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} ctl_io_status;
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/*
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* WARNING: Keep the data in/out/none flags where they are. They're used
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* in conjunction with ctl_cmd_flags. See comment above ctl_cmd_flags
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* definition in ctl_private.h.
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*/
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typedef enum {
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CTL_FLAG_NONE = 0x00000000, /* no flags */
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CTL_FLAG_DATA_IN = 0x00000001, /* DATA IN */
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CTL_FLAG_DATA_OUT = 0x00000002, /* DATA OUT */
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CTL_FLAG_DATA_NONE = 0x00000003, /* no data */
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CTL_FLAG_DATA_MASK = 0x00000003,
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CTL_FLAG_DO_AUTOSENSE = 0x00000020, /* grab sense info */
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CTL_FLAG_USER_REQ = 0x00000040, /* request came from userland */
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CTL_FLAG_ALLOCATED = 0x00000100, /* data space allocated */
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CTL_FLAG_BLOCKED = 0x00000200, /* on the blocked queue */
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CTL_FLAG_ABORT_STATUS = 0x00000400, /* return TASK ABORTED status */
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CTL_FLAG_ABORT = 0x00000800, /* this I/O should be aborted */
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CTL_FLAG_DMA_INPROG = 0x00001000, /* DMA in progress */
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CTL_FLAG_DELAY_DONE = 0x00004000, /* delay injection done */
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CTL_FLAG_INT_COPY = 0x00008000, /* internal copy, no done call*/
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CTL_FLAG_SENT_2OTHER_SC = 0x00010000,
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CTL_FLAG_FROM_OTHER_SC = 0x00020000,
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CTL_FLAG_IS_WAS_ON_RTR = 0x00040000, /* Don't rerun cmd on failover*/
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CTL_FLAG_BUS_ADDR = 0x00080000, /* ctl_sglist contains BUS
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addresses, not virtual ones*/
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CTL_FLAG_IO_CONT = 0x00100000, /* Continue I/O instead of
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completing */
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#if 0
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CTL_FLAG_ALREADY_DONE = 0x00200000 /* I/O already completed */
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#endif
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CTL_FLAG_NO_DATAMOVE = 0x00400000,
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CTL_FLAG_DMA_QUEUED = 0x00800000, /* DMA queued but not started*/
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CTL_FLAG_STATUS_QUEUED = 0x01000000, /* Status queued but not sent*/
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CTL_FLAG_FAILOVER = 0x04000000, /* Killed by a failover */
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CTL_FLAG_IO_ACTIVE = 0x08000000, /* I/O active on this SC */
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CTL_FLAG_STATUS_SENT = 0x10000000, /* Status sent by datamove */
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CTL_FLAG_SERSEQ_DONE = 0x20000000 /* All storage I/O started */
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} ctl_io_flags;
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struct ctl_lba_len {
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uint64_t lba;
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uint32_t len;
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};
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struct ctl_lba_len_flags {
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uint64_t lba;
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uint32_t len;
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uint32_t flags;
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#define CTL_LLF_FUA 0x04000000
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#define CTL_LLF_DPO 0x08000000
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#define CTL_LLF_READ 0x10000000
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#define CTL_LLF_WRITE 0x20000000
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#define CTL_LLF_VERIFY 0x40000000
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#define CTL_LLF_COMPARE 0x80000000
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};
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struct ctl_ptr_len_flags {
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uint8_t *ptr;
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uint32_t len;
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uint32_t flags;
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};
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union ctl_priv {
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uint8_t bytes[sizeof(uint64_t) * 2];
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uint64_t integer;
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uint64_t integers[2];
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void *ptr;
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void *ptrs[2];
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};
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/*
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* Number of CTL private areas.
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*/
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#define CTL_NUM_PRIV 6
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/*
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* Which private area are we using for a particular piece of data?
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*/
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#define CTL_PRIV_LUN 0 /* CTL LUN pointer goes here */
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#define CTL_PRIV_LBA_LEN 1 /* Decoded LBA/len for read/write*/
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#define CTL_PRIV_MODEPAGE 1 /* Modepage info for config write */
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#define CTL_PRIV_BACKEND 2 /* Reserved for block, RAIDCore */
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#define CTL_PRIV_BACKEND_LUN 3 /* Backend LUN pointer */
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#define CTL_PRIV_FRONTEND 4 /* Frontend storage */
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#define CTL_PRIV_FRONTEND2 5 /* Another frontend storage */
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#define CTL_LUN(io) ((io)->io_hdr.ctl_private[CTL_PRIV_LUN].ptrs[0])
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#define CTL_SOFTC(io) ((io)->io_hdr.ctl_private[CTL_PRIV_LUN].ptrs[1])
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#define CTL_BACKEND_LUN(io) ((io)->io_hdr.ctl_private[CTL_PRIV_BACKEND_LUN].ptrs[0])
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#define CTL_PORT(io) (((struct ctl_softc *)CTL_SOFTC(io))-> \
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ctl_ports[(io)->io_hdr.nexus.targ_port])
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#define CTL_INVALID_PORTNAME 0xFF
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#define CTL_UNMAPPED_IID 0xFF
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struct ctl_sg_entry {
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void *addr;
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size_t len;
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};
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typedef enum {
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CTL_IO_NONE,
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CTL_IO_SCSI,
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CTL_IO_TASK,
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} ctl_io_type;
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struct ctl_nexus {
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uint32_t initid; /* Initiator ID */
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uint32_t targ_port; /* Target port, filled in by PORT */
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uint32_t targ_lun; /* Destination lun */
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uint32_t targ_mapped_lun; /* Destination lun CTL-wide */
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};
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typedef enum {
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CTL_MSG_SERIALIZE,
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CTL_MSG_R2R,
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CTL_MSG_FINISH_IO,
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CTL_MSG_BAD_JUJU,
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CTL_MSG_MANAGE_TASKS,
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CTL_MSG_PERS_ACTION,
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CTL_MSG_DATAMOVE,
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CTL_MSG_DATAMOVE_DONE,
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CTL_MSG_UA, /* Set/clear UA on secondary. */
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CTL_MSG_PORT_SYNC, /* Information about port. */
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CTL_MSG_LUN_SYNC, /* Information about LUN. */
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CTL_MSG_IID_SYNC, /* Information about initiator. */
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CTL_MSG_LOGIN, /* Information about HA peer. */
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CTL_MSG_MODE_SYNC, /* Mode page current content. */
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CTL_MSG_FAILOVER /* Fake, never sent though the wire */
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} ctl_msg_type;
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struct ctl_scsiio;
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struct ctl_io_hdr {
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uint32_t version; /* interface version XXX */
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ctl_io_type io_type; /* task I/O, SCSI I/O, etc. */
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ctl_msg_type msg_type;
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struct ctl_nexus nexus; /* Initiator, port, target, lun */
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uint32_t iid_indx; /* the index into the iid mapping */
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uint32_t flags; /* transaction flags */
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uint32_t status; /* transaction status */
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uint32_t port_status; /* trans status, set by PORT, 0 = good*/
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uint32_t timeout; /* timeout in ms */
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uint32_t retries; /* retry count */
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#ifdef CTL_IO_DELAY
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struct callout delay_callout;
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#endif /* CTL_IO_DELAY */
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#ifdef CTL_TIME_IO
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time_t start_time; /* I/O start time */
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struct bintime start_bt; /* Timer start ticks */
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struct bintime dma_start_bt; /* DMA start ticks */
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struct bintime dma_bt; /* DMA total ticks */
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#endif /* CTL_TIME_IO */
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uint32_t num_dmas; /* Number of DMAs */
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union ctl_io *original_sc;
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union ctl_io *serializing_sc;
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void *pool; /* I/O pool */
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union ctl_priv ctl_private[CTL_NUM_PRIV];/* CTL private area */
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struct ctl_sg_entry *remote_sglist;
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struct ctl_sg_entry *local_sglist;
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STAILQ_ENTRY(ctl_io_hdr) links; /* linked list pointer */
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TAILQ_ENTRY(ctl_io_hdr) ooa_links;
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TAILQ_ENTRY(ctl_io_hdr) blocked_links;
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};
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typedef enum {
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CTL_TAG_UNTAGGED,
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CTL_TAG_SIMPLE,
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CTL_TAG_ORDERED,
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CTL_TAG_HEAD_OF_QUEUE,
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CTL_TAG_ACA
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} ctl_tag_type;
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union ctl_io;
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/*
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* SCSI passthrough I/O structure for the CAM Target Layer. Note
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* that some of these fields are here for completeness, but they aren't
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* used in the CTL implementation. e.g., timeout and retries won't be
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* used.
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*
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* Note: Make sure the io_hdr is *always* the first element in this
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* structure.
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*/
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struct ctl_scsiio {
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struct ctl_io_hdr io_hdr; /* common to all I/O types */
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/*
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* The ext_* fields are generally intended for frontend use; CTL itself
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* doesn't modify or use them.
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*/
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uint32_t ext_sg_entries; /* 0 = no S/G list, > 0 = num entries */
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uint8_t *ext_data_ptr; /* data buffer or S/G list */
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uint32_t ext_data_len; /* Data transfer length */
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uint32_t ext_data_filled; /* Amount of data filled so far */
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/*
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* The number of scatter/gather entries in the list pointed to
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* by kern_data_ptr. 0 means there is no list, just a data pointer.
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*/
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uint32_t kern_sg_entries;
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uint32_t rem_sg_entries; /* Unused. */
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/*
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* The data pointer or a pointer to the scatter/gather list.
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*/
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uint8_t *kern_data_ptr;
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/*
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* Length of the data buffer or scatter/gather list. It's also
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* the length of this particular piece of the data transfer,
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* ie. number of bytes expected to be transferred by the current
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* invocation of frontend's datamove() callback. It's always
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* less than or equal to kern_total_len.
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*/
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uint32_t kern_data_len;
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/*
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* Total length of data to be transferred during this particular
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* SCSI command, as decoded from SCSI CDB.
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*/
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uint32_t kern_total_len;
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/*
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* Amount of data left after the current data transfer.
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*/
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uint32_t kern_data_resid;
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/*
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* Byte offset of this transfer, equal to the amount of data
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* already transferred for this SCSI command during previous
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* datamove() invocations.
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*/
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uint32_t kern_rel_offset;
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struct scsi_sense_data sense_data; /* sense data */
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uint8_t sense_len; /* Returned sense length */
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uint8_t scsi_status; /* SCSI status byte */
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uint8_t sense_residual; /* Unused. */
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uint32_t residual; /* Unused */
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uint32_t tag_num; /* tag number */
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ctl_tag_type tag_type; /* simple, ordered, head of queue,etc.*/
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uint8_t cdb_len; /* CDB length */
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uint8_t cdb[CTL_MAX_CDBLEN]; /* CDB */
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int (*be_move_done)(union ctl_io *io); /* called by fe */
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int (*io_cont)(union ctl_io *io); /* to continue processing */
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};
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typedef enum {
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CTL_TASK_ABORT_TASK,
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CTL_TASK_ABORT_TASK_SET,
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CTL_TASK_CLEAR_ACA,
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CTL_TASK_CLEAR_TASK_SET,
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CTL_TASK_I_T_NEXUS_RESET,
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CTL_TASK_LUN_RESET,
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CTL_TASK_TARGET_RESET,
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CTL_TASK_BUS_RESET,
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CTL_TASK_PORT_LOGIN,
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CTL_TASK_PORT_LOGOUT,
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CTL_TASK_QUERY_TASK,
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CTL_TASK_QUERY_TASK_SET,
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CTL_TASK_QUERY_ASYNC_EVENT
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} ctl_task_type;
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typedef enum {
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CTL_TASK_FUNCTION_COMPLETE,
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CTL_TASK_FUNCTION_SUCCEEDED,
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CTL_TASK_FUNCTION_REJECTED,
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CTL_TASK_LUN_DOES_NOT_EXIST,
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CTL_TASK_FUNCTION_NOT_SUPPORTED
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} ctl_task_status;
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/*
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* Task management I/O structure. Aborts, bus resets, etc., are sent using
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* this structure.
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*
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* Note: Make sure the io_hdr is *always* the first element in this
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* structure.
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*/
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struct ctl_taskio {
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struct ctl_io_hdr io_hdr; /* common to all I/O types */
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ctl_task_type task_action; /* Target Reset, Abort, etc. */
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uint32_t tag_num; /* tag number */
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ctl_tag_type tag_type; /* simple, ordered, etc. */
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uint8_t task_status; /* Complete, Succeeded, etc. */
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uint8_t task_resp[3];/* Response information */
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};
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/*
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* HA link messages.
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*/
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#define CTL_HA_VERSION 3
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/*
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* Used for CTL_MSG_LOGIN.
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*/
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struct ctl_ha_msg_login {
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ctl_msg_type msg_type;
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int version;
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int ha_mode;
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int ha_id;
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int max_luns;
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int max_ports;
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int max_init_per_port;
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};
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typedef enum {
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CTL_PR_REG_KEY,
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CTL_PR_UNREG_KEY,
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CTL_PR_PREEMPT,
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CTL_PR_CLEAR,
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CTL_PR_RESERVE,
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CTL_PR_RELEASE
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} ctl_pr_action;
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/*
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* The PR info is specifically for sending Persistent Reserve actions
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* to the other SC which it must also act on.
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*
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* Note: Make sure the io_hdr is *always* the first element in this
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* structure.
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*/
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struct ctl_pr_info {
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ctl_pr_action action;
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uint8_t sa_res_key[8];
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uint8_t res_type;
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uint32_t residx;
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};
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struct ctl_ha_msg_hdr {
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ctl_msg_type msg_type;
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uint32_t status; /* transaction status */
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union ctl_io *original_sc;
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union ctl_io *serializing_sc;
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struct ctl_nexus nexus; /* Initiator, port, target, lun */
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};
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#define CTL_HA_MAX_SG_ENTRIES 16
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#define CTL_HA_DATAMOVE_SEGMENT 131072
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/*
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* Used for CTL_MSG_PERS_ACTION.
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*/
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struct ctl_ha_msg_pr {
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struct ctl_ha_msg_hdr hdr;
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struct ctl_pr_info pr_info;
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};
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/*
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* Used for CTL_MSG_UA.
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*/
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struct ctl_ha_msg_ua {
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struct ctl_ha_msg_hdr hdr;
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int ua_all;
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int ua_set;
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int ua_type;
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uint8_t ua_info[8];
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};
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/*
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* The S/G handling here is a little different than the standard ctl_scsiio
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* structure, because we can't pass data by reference in between controllers.
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* The S/G list in the ctl_scsiio struct is normally passed in the
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* kern_data_ptr field. So kern_sg_entries here will always be non-zero,
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* even if there is only one entry.
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*
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* Used for CTL_MSG_DATAMOVE.
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*/
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struct ctl_ha_msg_dt {
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struct ctl_ha_msg_hdr hdr;
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ctl_io_flags flags; /* Only I/O flags are used here */
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uint32_t sg_sequence; /* S/G portion number */
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uint8_t sg_last; /* last S/G batch = 1 */
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uint32_t sent_sg_entries; /* previous S/G count */
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uint32_t cur_sg_entries; /* current S/G entries */
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uint32_t kern_sg_entries; /* total S/G entries */
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uint32_t kern_data_len; /* Length of this S/G list */
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uint32_t kern_total_len; /* Total length of this
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transaction */
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uint32_t kern_data_resid; /* Length left to transfer
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after this*/
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uint32_t kern_rel_offset; /* Byte Offset of this
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transfer */
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struct ctl_sg_entry sg_list[CTL_HA_MAX_SG_ENTRIES];
|
|
};
|
|
|
|
/*
|
|
* Used for CTL_MSG_SERIALIZE, CTL_MSG_FINISH_IO, CTL_MSG_BAD_JUJU,
|
|
* and CTL_MSG_DATAMOVE_DONE.
|
|
*/
|
|
struct ctl_ha_msg_scsi {
|
|
struct ctl_ha_msg_hdr hdr;
|
|
uint32_t tag_num; /* tag number */
|
|
ctl_tag_type tag_type; /* simple, ordered, etc. */
|
|
uint8_t cdb[CTL_MAX_CDBLEN]; /* CDB */
|
|
uint8_t cdb_len; /* CDB length */
|
|
uint8_t scsi_status; /* SCSI status byte */
|
|
uint8_t sense_len; /* Returned sense length */
|
|
uint32_t port_status; /* trans status, set by FETD,
|
|
0 = good*/
|
|
uint32_t kern_data_resid; /* for DATAMOVE_DONE */
|
|
struct scsi_sense_data sense_data; /* sense data */
|
|
};
|
|
|
|
/*
|
|
* Used for CTL_MSG_MANAGE_TASKS.
|
|
*/
|
|
struct ctl_ha_msg_task {
|
|
struct ctl_ha_msg_hdr hdr;
|
|
ctl_task_type task_action; /* Target Reset, Abort, etc. */
|
|
uint32_t tag_num; /* tag number */
|
|
ctl_tag_type tag_type; /* simple, ordered, etc. */
|
|
};
|
|
|
|
/*
|
|
* Used for CTL_MSG_PORT_SYNC.
|
|
*/
|
|
struct ctl_ha_msg_port {
|
|
struct ctl_ha_msg_hdr hdr;
|
|
int port_type;
|
|
int physical_port;
|
|
int virtual_port;
|
|
int status;
|
|
int name_len;
|
|
int lun_map_len;
|
|
int port_devid_len;
|
|
int target_devid_len;
|
|
int init_devid_len;
|
|
uint8_t data[];
|
|
};
|
|
|
|
/*
|
|
* Used for CTL_MSG_LUN_SYNC.
|
|
*/
|
|
struct ctl_ha_msg_lun {
|
|
struct ctl_ha_msg_hdr hdr;
|
|
int flags;
|
|
unsigned int pr_generation;
|
|
uint32_t pr_res_idx;
|
|
uint8_t pr_res_type;
|
|
int lun_devid_len;
|
|
int pr_key_count;
|
|
uint8_t data[];
|
|
};
|
|
|
|
struct ctl_ha_msg_lun_pr_key {
|
|
uint32_t pr_iid;
|
|
uint64_t pr_key;
|
|
};
|
|
|
|
/*
|
|
* Used for CTL_MSG_IID_SYNC.
|
|
*/
|
|
struct ctl_ha_msg_iid {
|
|
struct ctl_ha_msg_hdr hdr;
|
|
int in_use;
|
|
int name_len;
|
|
uint64_t wwpn;
|
|
uint8_t data[];
|
|
};
|
|
|
|
/*
|
|
* Used for CTL_MSG_MODE_SYNC.
|
|
*/
|
|
struct ctl_ha_msg_mode {
|
|
struct ctl_ha_msg_hdr hdr;
|
|
uint8_t page_code;
|
|
uint8_t subpage;
|
|
uint16_t page_len;
|
|
uint8_t data[];
|
|
};
|
|
|
|
union ctl_ha_msg {
|
|
struct ctl_ha_msg_hdr hdr;
|
|
struct ctl_ha_msg_task task;
|
|
struct ctl_ha_msg_scsi scsi;
|
|
struct ctl_ha_msg_dt dt;
|
|
struct ctl_ha_msg_pr pr;
|
|
struct ctl_ha_msg_ua ua;
|
|
struct ctl_ha_msg_port port;
|
|
struct ctl_ha_msg_lun lun;
|
|
struct ctl_ha_msg_iid iid;
|
|
struct ctl_ha_msg_login login;
|
|
struct ctl_ha_msg_mode mode;
|
|
};
|
|
|
|
struct ctl_prio {
|
|
struct ctl_io_hdr io_hdr;
|
|
struct ctl_ha_msg_pr pr_msg;
|
|
};
|
|
|
|
union ctl_io {
|
|
struct ctl_io_hdr io_hdr; /* common to all I/O types */
|
|
struct ctl_scsiio scsiio; /* Normal SCSI commands */
|
|
struct ctl_taskio taskio; /* SCSI task management/reset */
|
|
struct ctl_prio presio; /* update per. res info on other SC */
|
|
};
|
|
|
|
#ifdef _KERNEL
|
|
|
|
union ctl_io *ctl_alloc_io(void *pool_ref);
|
|
union ctl_io *ctl_alloc_io_nowait(void *pool_ref);
|
|
void ctl_free_io(union ctl_io *io);
|
|
void ctl_zero_io(union ctl_io *io);
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* _CTL_IO_H_ */
|
|
|
|
/*
|
|
* vim: ts=8
|
|
*/
|