262 lines
7.1 KiB
C
262 lines
7.1 KiB
C
/* $NetBSD: scsi_base.c,v 1.90 2012/04/20 20:23:21 bouyer Exp $ */
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/*-
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* Copyright (c) 1998, 2004 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Charles M. Hannum.
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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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: scsi_base.c,v 1.90 2012/04/20 20:23:21 bouyer Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/buf.h>
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#include <sys/uio.h>
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#include <sys/malloc.h>
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#include <sys/errno.h>
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#include <sys/device.h>
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#include <sys/proc.h>
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#include <dev/scsipi/scsipi_all.h>
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#include <dev/scsipi/scsi_all.h>
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#include <dev/scsipi/scsi_disk.h>
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#include <dev/scsipi/scsiconf.h>
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#include <dev/scsipi/scsipi_base.h>
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static void scsi_print_xfer_mode(struct scsipi_periph *);
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/*
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* Do a scsi operation, asking a device to run as SCSI-II if it can.
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*/
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int
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scsi_change_def(struct scsipi_periph *periph, int flags)
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{
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struct scsi_changedef cmd;
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memset(&cmd, 0, sizeof(cmd));
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cmd.opcode = SCSI_CHANGE_DEFINITION;
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cmd.how = SC_SCSI_2;
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return (scsipi_command(periph, (void *)&cmd, sizeof(cmd), 0, 0,
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SCSIPIRETRIES, 100000, NULL, flags));
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}
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/*
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* ask the scsi driver to perform a command for us.
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* tell it where to read/write the data, and how
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* long the data is supposed to be. If we have a buf
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* to associate with the transfer, we need that too.
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*/
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void
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scsi_scsipi_cmd(struct scsipi_xfer *xs)
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{
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struct scsipi_periph *periph = xs->xs_periph;
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SC_DEBUG(periph, SCSIPI_DB2, ("scsi_scsipi_cmd\n"));
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/*
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* Set the LUN in the CDB if we have an older device. We also
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* set it for more modern SCSI-2 devices "just in case".
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*/
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if (periph->periph_version <= 2)
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xs->cmd->bytes[0] |=
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((periph->periph_lun << SCSI_CMD_LUN_SHIFT) &
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SCSI_CMD_LUN_MASK);
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}
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/*
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* Utility routines often used in SCSI stuff
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*/
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/*
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* Print out the periph's address info.
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*/
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void
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scsi_print_addr(struct scsipi_periph *periph)
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{
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struct scsipi_channel *chan = periph->periph_channel;
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struct scsipi_adapter *adapt = chan->chan_adapter;
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printf("%s(%s:%d:%d:%d): ", periph->periph_dev != NULL ?
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device_xname(periph->periph_dev) : "probe",
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device_xname(adapt->adapt_dev),
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chan->chan_channel, periph->periph_target,
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periph->periph_lun);
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}
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/*
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* Kill off all pending xfers for a periph.
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*
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* Must be called at splbio().
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*/
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void
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scsi_kill_pending(struct scsipi_periph *periph)
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{
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}
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/*
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* scsi_print_xfer_mode:
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*
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* Print a parallel SCSI periph's capabilities.
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*/
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static void
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scsi_print_xfer_mode(struct scsipi_periph *periph)
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{
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int period, freq, speed, mbs;
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aprint_normal_dev(periph->periph_dev, "");
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if (periph->periph_mode & (PERIPH_CAP_SYNC | PERIPH_CAP_DT)) {
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period = scsipi_sync_factor_to_period(periph->periph_period);
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aprint_normal("sync (%d.%02dns offset %d)",
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period / 100, period % 100, periph->periph_offset);
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} else
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aprint_normal("async");
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if (periph->periph_mode & PERIPH_CAP_WIDE32)
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aprint_normal(", 32-bit");
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else if (periph->periph_mode & (PERIPH_CAP_WIDE16 | PERIPH_CAP_DT))
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aprint_normal(", 16-bit");
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else
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aprint_normal(", 8-bit");
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if (periph->periph_mode & (PERIPH_CAP_SYNC | PERIPH_CAP_DT)) {
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freq = scsipi_sync_factor_to_freq(periph->periph_period);
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speed = freq;
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if (periph->periph_mode & PERIPH_CAP_WIDE32)
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speed *= 4;
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else if (periph->periph_mode &
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(PERIPH_CAP_WIDE16 | PERIPH_CAP_DT))
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speed *= 2;
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mbs = speed / 1000;
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if (mbs > 0) {
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aprint_normal(" (%d.%03dMB/s)", mbs,
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speed % 1000);
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} else
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aprint_normal(" (%dKB/s)", speed % 1000);
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}
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aprint_normal(" transfers");
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if (periph->periph_mode & PERIPH_CAP_TQING)
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aprint_normal(", tagged queueing");
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aprint_normal("\n");
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}
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/*
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* scsi_async_event_xfer_mode:
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*
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* Update the xfer mode for all parallel SCSI periphs sharing the
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* specified I_T Nexus.
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*/
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void
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scsi_async_event_xfer_mode(struct scsipi_channel *chan, void *arg)
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{
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struct scsipi_xfer_mode *xm = arg;
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struct scsipi_periph *periph;
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int lun, announce, mode, period, offset;
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for (lun = 0; lun < chan->chan_nluns; lun++) {
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periph = scsipi_lookup_periph(chan, xm->xm_target, lun);
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if (periph == NULL)
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continue;
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announce = 0;
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/*
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* Clamp the xfer mode down to this periph's capabilities.
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*/
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mode = xm->xm_mode & periph->periph_cap;
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if (mode & PERIPH_CAP_SYNC) {
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period = xm->xm_period;
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offset = xm->xm_offset;
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} else {
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period = 0;
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offset = 0;
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}
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/*
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* If we do not have a valid xfer mode yet, or the parameters
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* are different, announce them.
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*/
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if ((periph->periph_flags & PERIPH_MODE_VALID) == 0 ||
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periph->periph_mode != mode ||
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periph->periph_period != period ||
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periph->periph_offset != offset)
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announce = 1;
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periph->periph_mode = mode;
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periph->periph_period = period;
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periph->periph_offset = offset;
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periph->periph_flags |= PERIPH_MODE_VALID;
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if (announce)
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scsi_print_xfer_mode(periph);
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}
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}
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/*
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* scsipi_async_event_xfer_mode:
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*
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* Update the xfer mode for all SAS/FC periphs sharing the
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* specified I_T Nexus.
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*/
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void
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scsi_fc_sas_async_event_xfer_mode(struct scsipi_channel *chan, void *arg)
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{
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struct scsipi_xfer_mode *xm = arg;
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struct scsipi_periph *periph;
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int lun, announce, mode;
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for (lun = 0; lun < chan->chan_nluns; lun++) {
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periph = scsipi_lookup_periph(chan, xm->xm_target, lun);
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if (periph == NULL)
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continue;
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announce = 0;
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/*
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* Clamp the xfer mode down to this periph's capabilities.
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*/
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mode = xm->xm_mode & periph->periph_cap;
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/*
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* If we do not have a valid xfer mode yet, or the parameters
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* are different, announce them.
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*/
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if ((periph->periph_flags & PERIPH_MODE_VALID) == 0 ||
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periph->periph_mode != mode)
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announce = 1;
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periph->periph_mode = mode;
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periph->periph_flags |= PERIPH_MODE_VALID;
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if (announce &&
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(periph->periph_mode & PERIPH_CAP_TQING) != 0) {
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aprint_normal_dev(periph->periph_dev,
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"tagged queueing\n");
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}
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}
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}
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