528 lines
16 KiB
C
528 lines
16 KiB
C
/*-
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* Copyright (c) 2003 Silicon Graphics International Corp.
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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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#ifdef _CTL_C
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#define EXTERN(__var,__val) __var = __val
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#else
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#define EXTERN(__var,__val) extern __var
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#endif
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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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EXTERN(int ctl_time_io_secs, CTL_TIME_IO_DEFAULT_SECS);
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#endif
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/*
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* Uncomment these next two lines 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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#define CTL_TIMER_BYTES sizeof(struct callout)
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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 conjuction 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_KDPTR_SGLIST = 0x00000008, /* kern_data_ptr is S/G list*/
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CTL_FLAG_EDPTR_SGLIST = 0x00000010, /* ext_data_ptr is S/G list */
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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_CONTROL_DEV = 0x00000080, /* processor device */
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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 = 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_NO_DATASYNC = 0x00002000, /* don't cache flush data */
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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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CTL_FLAG_AUTO_MIRROR = 0x00200000, /* Automatically use memory
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from the RC cache mirrored
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address area. */
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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_REDIR_DONE = 0x02000000, /* Redirection has already
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been done. */
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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_RDMA_MASK = CTL_FLAG_NO_DATASYNC | CTL_FLAG_BUS_ADDR |
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CTL_FLAG_AUTO_MIRROR | CTL_FLAG_REDIR_DONE
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/* Flags we care about for
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remote DMA */
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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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};
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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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void *ptr;
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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 /* LSI driver, ioctl front end */
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#define CTL_PRIV_USER 5 /* Userland use */
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#define CTL_INVALID_PORTNAME 0xFF
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#define CTL_UNMAPPED_IID 0xFF
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/*
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* XXX KDM this size is for the port_priv variable in struct ctl_io_hdr
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* below. This should be defined in terms of the size of struct
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* ctlfe_lun_cmd_info at the moment:
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* struct ctlfe_lun_cmd_info {
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* int cur_transfer_index;
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* ctlfe_cmd_flags flags;
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* bus_dma_segment_t cam_sglist[32];
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* };
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*
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* This isn't really the way I'd prefer to do it, but it does make some
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* sense, AS LONG AS we can guarantee that there will always only be one
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* outstanding DMA request per ctl_io. If that assumption isn't valid,
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* then we've got problems.
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*
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* At some point it may be nice switch CTL over to using CCBs for
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* everything. At that point we can probably use the ATIO/CTIO model, so
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* that multiple simultaneous DMAs per command will just work.
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*
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* Also note that the current size, 600, is appropriate for 64-bit
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* architectures, but is overkill for 32-bit architectures. Need a way to
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* figure out the size at compile time, or just get rid of this altogether.
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*/
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#define CTL_PORT_PRIV_SIZE 600
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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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struct ctl_id {
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uint32_t id;
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uint64_t wwid[2];
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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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struct ctl_id initid; /* Initiator ID */
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uint32_t targ_port; /* Target port, filled in by PORT */
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struct ctl_id targ_target; /* Destination target */
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uint32_t targ_lun; /* Destination lun */
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uint32_t (*lun_map_fn)(void *arg, uint32_t lun);
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void *lun_map_arg;
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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_SYNC_FE,
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CTL_MSG_APS_LOCK,
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CTL_MSG_DATAMOVE,
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CTL_MSG_DATAMOVE_DONE
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} ctl_msg_type;
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struct ctl_scsiio;
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#define CTL_NUM_SG_ENTRIES 9
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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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uint8_t timer_bytes[CTL_TIMER_BYTES]; /* timer kludge */
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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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uint32_t num_dmas; /* Number of DMAs */
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#endif /* CTL_TIME_IO */
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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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uint8_t port_priv[CTL_PORT_PRIV_SIZE];/* PORT private area*/
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struct ctl_sg_entry remote_sglist[CTL_NUM_SG_ENTRIES];
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struct ctl_sg_entry remote_dma_sglist[CTL_NUM_SG_ENTRIES];
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struct ctl_sg_entry local_sglist[CTL_NUM_SG_ENTRIES];
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struct ctl_sg_entry local_dma_sglist[CTL_NUM_SG_ENTRIES];
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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; /* data residual length */
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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_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_type;
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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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};
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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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uint16_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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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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uint32_t status; /* transaction status */
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TAILQ_ENTRY(ctl_ha_msg_hdr) links;
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};
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#define CTL_HA_MAX_SG_ENTRIES 16
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/*
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* Used for CTL_MSG_APS_LOCK.
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*/
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struct ctl_ha_msg_aps {
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struct ctl_ha_msg_hdr hdr;
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uint8_t lock_flag;
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};
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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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* 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];
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};
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/*
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* Used for CTL_MSG_SERIALIZE, CTL_MSG_FINISH_IO, CTL_MSG_BAD_JUJU.
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*/
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struct ctl_ha_msg_scsi {
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struct ctl_ha_msg_hdr hdr;
|
|
uint8_t cdb[CTL_MAX_CDBLEN]; /* CDB */
|
|
uint32_t tag_num; /* tag number */
|
|
ctl_tag_type tag_type; /* simple, ordered, etc. */
|
|
uint8_t scsi_status; /* SCSI status byte */
|
|
struct scsi_sense_data sense_data; /* sense data */
|
|
uint8_t sense_len; /* Returned sense length */
|
|
uint8_t sense_residual; /* sense residual length */
|
|
uint32_t residual; /* data residual length */
|
|
uint32_t fetd_status; /* trans status, set by FETD,
|
|
0 = good*/
|
|
struct ctl_lba_len lbalen; /* used for stats */
|
|
};
|
|
|
|
/*
|
|
* 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. */
|
|
};
|
|
|
|
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_aps aps;
|
|
};
|
|
|
|
|
|
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);
|
|
void ctl_free_io(union ctl_io *io);
|
|
void ctl_zero_io(union ctl_io *io);
|
|
void ctl_copy_io(union ctl_io *src, union ctl_io *dest);
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* _CTL_IO_H_ */
|
|
|
|
/*
|
|
* vim: ts=8
|
|
*/
|