63d14cff85
pass more informations about the bus:
- bustype_type has 2 different bytes, one holding the existing
SCSIPI_BUSTYPE_* (scsi, atapi, ata), and one for a per-SCSIPI_BUSTYPE_*
subtype. Introduce macros to build or extract bustype_type.
- for SCSIPI_BUSTYPE_SCSI, define subtypes for parallel SCSI, Fibre Channel,
SAS and USB, to specify the transport method. SCSIPI_BUSTYPE_SCSI_PSCSI
is 0 so that bustype_type value doesn't change for existing code
- for non-SCSIPI_BUSTYPE_SCSI busses there's no defined subtype yet,
so the bustype_type value doesn't change.
- provide scsi_fc_bustype, scsi_sas_bustype and scsi_usb_bustype
along with scsi_bustype to be used by bus driver where appropriate
- scsipi_print_xfer_mode(): more existing code under a
(SCSIPI_BUSTYPE_SCSI, SCSIPI_BUSTYPE_SCSI_PSCSI) case, as
sync/wide parameters only make sense for parallel SCSI.
For (SCSIPI_BUSTYPE_SCSI, SCSIPI_BUSTYPE_SCSI_FC) and
(SCSIPI_BUSTYPE_SCSI, SCSIPI_BUSTYPE_SCSI_SAS), only print
tagged queing status if enabled. Just be silent for other
bustypes.
This change is prompted by this problem:
right now, FC (e.g. isp(4)) and SAS (e.g. mfi(4)) don't
do anything for ADAPTER_REQ_SET_XFER_MODE, and especially never
call scsipi_async_event(ASYNC_EVENT_XFER_MODE), so sd(4) always
runs untagged. Doing a scsipi_async_event(ASYNC_EVENT_XFER_MODE) with
appropriate parameters is enough to enable tagged queuing,
but then scsipi will print:
sd0: async, 8-bit transfers, tagged queueing
which is harmless (async, 8-bit transfers doens't make sense on SAS anyway)
but will confuse users. With this change scsipi will only print:
sd0: tagged queueing
which is correct.
In the long run, knowning the underlying transport in scsipi will
allow better handling of device which are not parallel SCSI.
Another change adding an extra callback to struct scsipi_bustype {}
will come (so that scsipi_print_xfer_mode(), which is SCSI-specific,
can be moved out of scsipi_base, and split into per-subtype callback),
but this will break kernel ABI and so is not suitable for
netbsd-6, so will be commmited later. The above is enough to get
tagged queuing on FC and SAS in netbsd-6.
423 lines
11 KiB
C
423 lines
11 KiB
C
/* $NetBSD: scsipi_ioctl.c,v 1.67 2012/04/19 17:45:20 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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/*
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* Contributed by HD Associates (hd@world.std.com).
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* Copyright (c) 1992, 1993 HD Associates
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*
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* Berkeley style copyright.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: scsipi_ioctl.c,v 1.67 2012/04/19 17:45:20 bouyer Exp $");
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#include "opt_compat_freebsd.h"
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#include "opt_compat_netbsd.h"
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#include <sys/param.h>
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#include <sys/errno.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/buf.h>
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#include <sys/proc.h>
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#include <sys/device.h>
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#include <sys/fcntl.h>
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#include <dev/scsipi/scsipi_all.h>
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#include <dev/scsipi/scsipiconf.h>
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#include <dev/scsipi/scsipi_base.h>
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#include <dev/scsipi/scsiconf.h>
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#include <sys/scsiio.h>
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#include "scsibus.h"
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#include "atapibus.h"
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struct scsi_ioctl {
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LIST_ENTRY(scsi_ioctl) si_list;
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struct buf si_bp;
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struct uio si_uio;
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struct iovec si_iov;
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scsireq_t si_screq;
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struct scsipi_periph *si_periph;
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};
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static LIST_HEAD(, scsi_ioctl) si_head;
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static struct scsi_ioctl *
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si_get(void)
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{
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struct scsi_ioctl *si;
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int s;
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si = malloc(sizeof(struct scsi_ioctl), M_TEMP, M_WAITOK|M_ZERO);
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buf_init(&si->si_bp);
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s = splbio();
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LIST_INSERT_HEAD(&si_head, si, si_list);
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splx(s);
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return (si);
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}
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static void
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si_free(struct scsi_ioctl *si)
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{
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int s;
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s = splbio();
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LIST_REMOVE(si, si_list);
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splx(s);
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buf_destroy(&si->si_bp);
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free(si, M_TEMP);
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}
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static struct scsi_ioctl *
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si_find(struct buf *bp)
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{
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struct scsi_ioctl *si;
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int s;
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s = splbio();
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for (si = si_head.lh_first; si != 0; si = si->si_list.le_next)
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if (bp == &si->si_bp)
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break;
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splx(s);
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return (si);
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}
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/*
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* We let the user interpret his own sense in the generic scsi world.
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* This routine is called at interrupt time if the XS_CTL_USERCMD bit was set
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* in the flags passed to scsi_scsipi_cmd(). No other completion processing
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* takes place, even if we are running over another device driver.
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* The lower level routines that call us here, will free the xs and restart
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* the device's queue if such exists.
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*/
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void
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scsipi_user_done(struct scsipi_xfer *xs)
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{
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struct buf *bp;
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struct scsi_ioctl *si;
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scsireq_t *screq;
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struct scsipi_periph *periph = xs->xs_periph;
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int s;
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bp = xs->bp;
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#ifdef DIAGNOSTIC
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if (bp == NULL) {
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scsipi_printaddr(periph);
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printf("user command with no buf\n");
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panic("scsipi_user_done");
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}
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#endif
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si = si_find(bp);
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#ifdef DIAGNOSTIC
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if (si == NULL) {
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scsipi_printaddr(periph);
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printf("user command with no ioctl\n");
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panic("scsipi_user_done");
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}
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#endif
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screq = &si->si_screq;
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SC_DEBUG(xs->xs_periph, SCSIPI_DB2, ("user-done\n"));
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screq->retsts = 0;
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screq->status = xs->status;
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switch (xs->error) {
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case XS_NOERROR:
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SC_DEBUG(periph, SCSIPI_DB3, ("no error\n"));
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screq->datalen_used =
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xs->datalen - xs->resid; /* probably rubbish */
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screq->retsts = SCCMD_OK;
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break;
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case XS_SENSE:
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SC_DEBUG(periph, SCSIPI_DB3, ("have sense\n"));
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screq->senselen_used = min(sizeof(xs->sense.scsi_sense),
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SENSEBUFLEN);
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memcpy(screq->sense, &xs->sense.scsi_sense, screq->senselen);
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screq->retsts = SCCMD_SENSE;
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break;
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case XS_SHORTSENSE:
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SC_DEBUG(periph, SCSIPI_DB3, ("have short sense\n"));
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screq->senselen_used = min(sizeof(xs->sense.atapi_sense),
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SENSEBUFLEN);
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memcpy(screq->sense, &xs->sense.scsi_sense, screq->senselen);
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screq->retsts = SCCMD_UNKNOWN; /* XXX need a shortsense here */
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break;
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case XS_DRIVER_STUFFUP:
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scsipi_printaddr(periph);
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printf("passthrough: adapter inconsistency\n");
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screq->retsts = SCCMD_UNKNOWN;
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break;
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case XS_SELTIMEOUT:
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SC_DEBUG(periph, SCSIPI_DB3, ("seltimeout\n"));
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screq->retsts = SCCMD_TIMEOUT;
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break;
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case XS_TIMEOUT:
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SC_DEBUG(periph, SCSIPI_DB3, ("timeout\n"));
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screq->retsts = SCCMD_TIMEOUT;
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break;
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case XS_BUSY:
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SC_DEBUG(periph, SCSIPI_DB3, ("busy\n"));
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screq->retsts = SCCMD_BUSY;
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break;
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default:
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scsipi_printaddr(periph);
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printf("unknown error category %d from adapter\n",
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xs->error);
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screq->retsts = SCCMD_UNKNOWN;
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break;
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}
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if (xs->xs_control & XS_CTL_ASYNC) {
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s = splbio();
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scsipi_put_xs(xs);
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splx(s);
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}
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}
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/* Pseudo strategy function
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* Called by scsipi_do_ioctl() via physio/physstrat if there is to
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* be data transfered, and directly if there is no data transfer.
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*
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* Should I reorganize this so it returns to physio instead
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* of sleeping in scsiio_scsipi_cmd? Is there any advantage, other
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* than avoiding the probable duplicate wakeup in iodone? [PD]
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*
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* No, seems ok to me... [JRE]
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* (I don't see any duplicate wakeups)
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*
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* Can't be used with block devices or raw_read/raw_write directly
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* from the cdevsw/bdevsw tables because they couldn't have added
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* the screq structure. [JRE]
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*/
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static void
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scsistrategy(struct buf *bp)
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{
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struct scsi_ioctl *si;
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scsireq_t *screq;
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struct scsipi_periph *periph;
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int error;
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int flags = 0;
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si = si_find(bp);
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if (si == NULL) {
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printf("scsistrategy: "
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"No matching ioctl request found in queue\n");
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error = EINVAL;
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goto done;
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}
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screq = &si->si_screq;
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periph = si->si_periph;
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SC_DEBUG(periph, SCSIPI_DB2, ("user_strategy\n"));
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/*
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* We're in trouble if physio tried to break up the transfer.
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*/
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if (bp->b_bcount != screq->datalen) {
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scsipi_printaddr(periph);
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printf("physio split the request.. cannot proceed\n");
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error = EIO;
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goto done;
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}
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if (screq->timeout == 0) {
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error = EINVAL;
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goto done;
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}
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if (screq->cmdlen > sizeof(struct scsipi_generic)) {
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scsipi_printaddr(periph);
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printf("cmdlen too big\n");
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error = EFAULT;
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goto done;
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}
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if ((screq->flags & SCCMD_READ) && screq->datalen > 0)
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flags |= XS_CTL_DATA_IN;
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if ((screq->flags & SCCMD_WRITE) && screq->datalen > 0)
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flags |= XS_CTL_DATA_OUT;
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if (screq->flags & SCCMD_TARGET)
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flags |= XS_CTL_TARGET;
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if (screq->flags & SCCMD_ESCAPE)
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flags |= XS_CTL_ESCAPE;
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error = scsipi_command(periph, (void *)screq->cmd, screq->cmdlen,
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(void *)bp->b_data, screq->datalen,
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0, /* user must do the retries *//* ignored */
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screq->timeout, bp, flags | XS_CTL_USERCMD);
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done:
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if (error)
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bp->b_resid = bp->b_bcount;
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bp->b_error = error;
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biodone(bp);
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return;
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}
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/*
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* Something (e.g. another driver) has called us
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* with a periph and a scsi-specific ioctl to perform,
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* better try. If user-level type command, we must
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* still be running in the context of the calling process
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*/
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int
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scsipi_do_ioctl(struct scsipi_periph *periph, dev_t dev, u_long cmd,
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void *addr, int flag, struct lwp *l)
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{
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int error;
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SC_DEBUG(periph, SCSIPI_DB2, ("scsipi_do_ioctl(0x%lx)\n", cmd));
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if (addr == NULL)
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return EINVAL;
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/* Check for the safe-ness of this request. */
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switch (cmd) {
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case OSCIOCIDENTIFY:
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case SCIOCIDENTIFY:
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break;
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case SCIOCCOMMAND:
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if ((((scsireq_t *)addr)->flags & SCCMD_READ) == 0 &&
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(flag & FWRITE) == 0)
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return (EBADF);
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break;
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default:
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if ((flag & FWRITE) == 0)
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return (EBADF);
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}
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switch (cmd) {
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case SCIOCCOMMAND: {
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scsireq_t *screq = (scsireq_t *)addr;
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struct scsi_ioctl *si;
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int len;
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si = si_get();
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si->si_screq = *screq;
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si->si_periph = periph;
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len = screq->datalen;
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if (len) {
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si->si_iov.iov_base = screq->databuf;
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si->si_iov.iov_len = len;
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si->si_uio.uio_iov = &si->si_iov;
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si->si_uio.uio_iovcnt = 1;
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si->si_uio.uio_resid = len;
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si->si_uio.uio_offset = 0;
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si->si_uio.uio_rw =
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(screq->flags & SCCMD_READ) ? UIO_READ : UIO_WRITE;
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if ((flag & FKIOCTL) == 0) {
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si->si_uio.uio_vmspace = l->l_proc->p_vmspace;
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} else {
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UIO_SETUP_SYSSPACE(&si->si_uio);
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}
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error = physio(scsistrategy, &si->si_bp, dev,
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(screq->flags & SCCMD_READ) ? B_READ : B_WRITE,
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periph->periph_channel->chan_adapter->adapt_minphys,
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&si->si_uio);
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} else {
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/* if no data, no need to translate it.. */
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si->si_bp.b_flags = 0;
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si->si_bp.b_data = 0;
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si->si_bp.b_bcount = 0;
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si->si_bp.b_dev = dev;
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si->si_bp.b_proc = l->l_proc;
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scsistrategy(&si->si_bp);
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error = si->si_bp.b_error;
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}
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*screq = si->si_screq;
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si_free(si);
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return (error);
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}
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case SCIOCDEBUG: {
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int level = *((int *)addr);
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SC_DEBUG(periph, SCSIPI_DB3, ("debug set to %d\n", level));
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periph->periph_dbflags = 0;
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if (level & 1)
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periph->periph_dbflags |= SCSIPI_DB1;
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if (level & 2)
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periph->periph_dbflags |= SCSIPI_DB2;
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if (level & 4)
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periph->periph_dbflags |= SCSIPI_DB3;
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if (level & 8)
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periph->periph_dbflags |= SCSIPI_DB4;
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return (0);
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}
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case SCIOCRECONFIG:
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case SCIOCDECONFIG:
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return (EINVAL);
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case SCIOCIDENTIFY: {
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struct scsi_addr *sca = (struct scsi_addr *)addr;
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switch (SCSIPI_BUSTYPE_TYPE(scsipi_periph_bustype(periph))) {
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case SCSIPI_BUSTYPE_SCSI:
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sca->type = TYPE_SCSI;
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sca->addr.scsi.scbus =
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device_unit(device_parent(periph->periph_dev));
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sca->addr.scsi.target = periph->periph_target;
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sca->addr.scsi.lun = periph->periph_lun;
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return (0);
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case SCSIPI_BUSTYPE_ATAPI:
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sca->type = TYPE_ATAPI;
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sca->addr.atapi.atbus =
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device_unit(device_parent(periph->periph_dev));
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sca->addr.atapi.drive = periph->periph_target;
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return (0);
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}
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return (ENXIO);
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}
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#if defined(COMPAT_12) || defined(COMPAT_FREEBSD)
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/* SCIOCIDENTIFY before ATAPI staff merge */
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case OSCIOCIDENTIFY: {
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struct oscsi_addr *sca = (struct oscsi_addr *)addr;
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switch (SCSIPI_BUSTYPE_TYPE(scsipi_periph_bustype(periph))) {
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case SCSIPI_BUSTYPE_SCSI:
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sca->scbus =
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device_unit(device_parent(periph->periph_dev));
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sca->target = periph->periph_target;
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sca->lun = periph->periph_lun;
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return (0);
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}
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return (ENODEV);
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}
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#endif
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default:
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return (ENOTTY);
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}
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#ifdef DIAGNOSTIC
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panic("scsipi_do_ioctl: impossible");
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#endif
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}
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