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freebsd-skq/sys/cam/scsi/scsi_da.c
ps c71ac689e0 Implement write combining for crashdumps. This is useful when 
write caching is disabled on both SCSI and IDE disks where large
memory dumps could take up to an hour to complete.

Taking an i386 scsi based system with 512MB of ram and timing (in
seconds) how long it took to complete a dump, the following results
were obtained:

Before:				After:
	WCE           TIME		WCE           TIME
	------------------		------------------
	1	141.820972		1	 15.600111
	0	797.265072		0	 65.480465

Obtained from:	Yahoo!
Reviewed by:	peter
2000-10-17 10:05:49 +00:00

1638 lines
40 KiB
C
Raw Blame History

/*
* Implementation of SCSI Direct Access Peripheral driver for CAM.
*
* Copyright (c) 1997 Justin T. Gibbs.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifdef _KERNEL
#include "opt_hw_wdog.h"
#endif /* _KERNEL */
#include <sys/param.h>
#ifdef _KERNEL
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bio.h>
#endif /* _KERNEL */
#include <sys/devicestat.h>
#include <sys/conf.h>
#include <sys/disk.h>
#include <sys/eventhandler.h>
#include <sys/malloc.h>
#include <sys/cons.h>
#include <machine/md_var.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#ifndef _KERNEL
#include <stdio.h>
#include <string.h>
#endif /* _KERNEL */
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_extend.h>
#include <cam/cam_periph.h>
#include <cam/cam_xpt_periph.h>
#include <cam/scsi/scsi_message.h>
#ifndef _KERNEL
#include <cam/scsi/scsi_da.h>
#endif /* !_KERNEL */
#ifdef _KERNEL
typedef enum {
DA_STATE_PROBE,
DA_STATE_NORMAL
} da_state;
typedef enum {
DA_FLAG_PACK_INVALID = 0x001,
DA_FLAG_NEW_PACK = 0x002,
DA_FLAG_PACK_LOCKED = 0x004,
DA_FLAG_PACK_REMOVABLE = 0x008,
DA_FLAG_TAGGED_QUEUING = 0x010,
DA_FLAG_NEED_OTAG = 0x020,
DA_FLAG_WENT_IDLE = 0x040,
DA_FLAG_RETRY_UA = 0x080,
DA_FLAG_OPEN = 0x100
} da_flags;
typedef enum {
DA_Q_NONE = 0x00,
DA_Q_NO_SYNC_CACHE = 0x01,
DA_Q_NO_6_BYTE = 0x02
} da_quirks;
typedef enum {
DA_CCB_PROBE = 0x01,
DA_CCB_BUFFER_IO = 0x02,
DA_CCB_WAITING = 0x03,
DA_CCB_DUMP = 0x04,
DA_CCB_TYPE_MASK = 0x0F,
DA_CCB_RETRY_UA = 0x10
} da_ccb_state;
/* Offsets into our private area for storing information */
#define ccb_state ppriv_field0
#define ccb_bp ppriv_ptr1
struct disk_params {
u_int8_t heads;
u_int16_t cylinders;
u_int8_t secs_per_track;
u_int32_t secsize; /* Number of bytes/sector */
u_int32_t sectors; /* total number sectors */
};
struct da_softc {
struct bio_queue_head bio_queue;
struct devstat device_stats;
SLIST_ENTRY(da_softc) links;
LIST_HEAD(, ccb_hdr) pending_ccbs;
da_state state;
da_flags flags;
da_quirks quirks;
int minimum_cmd_size;
int ordered_tag_count;
struct disk_params params;
struct disk disk;
union ccb saved_ccb;
};
struct da_quirk_entry {
struct scsi_inquiry_pattern inq_pat;
da_quirks quirks;
};
static const char quantum[] = "QUANTUM";
static const char microp[] = "MICROP";
static struct da_quirk_entry da_quirk_table[] =
{
{
/*
* This particular Fujitsu drive doesn't like the
* synchronize cache command.
* Reported by: Tom Jackson <toj@gorilla.net>
*/
{T_DIRECT, SIP_MEDIA_FIXED, "FUJITSU", "M2954*", "*"},
/*quirks*/ DA_Q_NO_SYNC_CACHE
},
{
/*
* This drive doesn't like the synchronize cache command
* either. Reported by: Matthew Jacob <mjacob@feral.com>
* in NetBSD PR kern/6027, August 24, 1998.
*/
{T_DIRECT, SIP_MEDIA_FIXED, microp, "2217*", "*"},
/*quirks*/ DA_Q_NO_SYNC_CACHE
},
{
/*
* This drive doesn't like the synchronize cache command
* either. Reported by: Hellmuth Michaelis (hm@kts.org)
* (PR 8882).
*/
{T_DIRECT, SIP_MEDIA_FIXED, microp, "2112*", "*"},
/*quirks*/ DA_Q_NO_SYNC_CACHE
},
{
/*
* Doesn't like the synchronize cache command.
* Reported by: Blaz Zupan <blaz@gold.amis.net>
*/
{T_DIRECT, SIP_MEDIA_FIXED, "NEC", "D3847*", "*"},
/*quirks*/ DA_Q_NO_SYNC_CACHE
},
{
/*
* Doesn't like the synchronize cache command.
*/
{T_DIRECT, SIP_MEDIA_FIXED, quantum, "MAVERICK 540S", "*"},
/*quirks*/ DA_Q_NO_SYNC_CACHE
},
{
/*
* Doesn't like the synchronize cache command.
*/
{T_DIRECT, SIP_MEDIA_FIXED, quantum, "LPS525S", "*"},
/*quirks*/ DA_Q_NO_SYNC_CACHE
},
{
/*
* Doesn't work correctly with 6 byte reads/writes.
* Returns illegal request, and points to byte 9 of the
* 6-byte CDB.
* Reported by: Adam McDougall <bsdx@spawnet.com>
*/
{T_DIRECT, SIP_MEDIA_FIXED, quantum, "VIKING 4*", "*"},
/*quirks*/ DA_Q_NO_6_BYTE
},
{
/*
* See above.
*/
{T_DIRECT, SIP_MEDIA_FIXED, quantum, "VIKING 2*", "*"},
/*quirks*/ DA_Q_NO_6_BYTE
},
/* Below a list of quirks for USB devices supported by umass. */
{
/*
* This USB floppy drive uses the UFI command set. This
* command set is a derivative of the ATAPI command set and
* does not support READ_6 commands only READ_10. It also does
* not support sync cache (0x35).
*/
{T_DIRECT, SIP_MEDIA_REMOVABLE, "Y-E DATA", "USB-FDU", "*"},
/*quirks*/ DA_Q_NO_6_BYTE|DA_Q_NO_SYNC_CACHE
},
{
/* Another USB floppy */
{T_DIRECT, SIP_MEDIA_REMOVABLE, "MATSHITA", "FDD CF-VFDU*","*"},
/*quirks*/ DA_Q_NO_6_BYTE|DA_Q_NO_SYNC_CACHE
},
{
{T_DIRECT, SIP_MEDIA_REMOVABLE, "Sony", "Sony DSC", "*"},
/*quirks*/ DA_Q_NO_6_BYTE
}
};
static d_open_t daopen;
static d_close_t daclose;
static d_strategy_t dastrategy;
static d_ioctl_t daioctl;
static d_dump_t dadump;
static periph_init_t dainit;
static void daasync(void *callback_arg, u_int32_t code,
struct cam_path *path, void *arg);
static periph_ctor_t daregister;
static periph_dtor_t dacleanup;
static periph_start_t dastart;
static periph_oninv_t daoninvalidate;
static void dadone(struct cam_periph *periph,
union ccb *done_ccb);
static int daerror(union ccb *ccb, u_int32_t cam_flags,
u_int32_t sense_flags);
static void daprevent(struct cam_periph *periph, int action);
static void dasetgeom(struct cam_periph *periph,
struct scsi_read_capacity_data * rdcap);
static timeout_t dasendorderedtag;
static void dashutdown(void *arg, int howto);
#ifndef DA_DEFAULT_TIMEOUT
#define DA_DEFAULT_TIMEOUT 60 /* Timeout in seconds */
#endif
/*
* DA_ORDEREDTAG_INTERVAL determines how often, relative
* to the default timeout, we check to see whether an ordered
* tagged transaction is appropriate to prevent simple tag
* starvation. Since we'd like to ensure that there is at least
* 1/2 of the timeout length left for a starved transaction to
* complete after we've sent an ordered tag, we must poll at least
* four times in every timeout period. This takes care of the worst
* case where a starved transaction starts during an interval that
* meets the requirement "don't send an ordered tag" test so it takes
* us two intervals to determine that a tag must be sent.
*/
#ifndef DA_ORDEREDTAG_INTERVAL
#define DA_ORDEREDTAG_INTERVAL 4
#endif
static struct periph_driver dadriver =
{
dainit, "da",
TAILQ_HEAD_INITIALIZER(dadriver.units), /* generation */ 0
};
DATA_SET(periphdriver_set, dadriver);
#define DA_CDEV_MAJOR 13
#define DA_BDEV_MAJOR 4
/* For 2.2-stable support */
#ifndef D_DISK
#define D_DISK 0
#endif
static struct cdevsw da_cdevsw = {
/* open */ daopen,
/* close */ daclose,
/* read */ physread,
/* write */ physwrite,
/* ioctl */ daioctl,
/* poll */ nopoll,
/* mmap */ nommap,
/* strategy */ dastrategy,
/* name */ "da",
/* maj */ DA_CDEV_MAJOR,
/* dump */ dadump,
/* psize */ nopsize,
/* flags */ D_DISK,
/* bmaj */ DA_BDEV_MAJOR
};
static struct cdevsw dadisk_cdevsw;
static SLIST_HEAD(,da_softc) softc_list;
static struct extend_array *daperiphs;
static int
daopen(dev_t dev, int flags, int fmt, struct proc *p)
{
struct cam_periph *periph;
struct da_softc *softc;
struct disklabel *label;
int unit;
int part;
int error;
int s;
unit = dkunit(dev);
part = dkpart(dev);
periph = cam_extend_get(daperiphs, unit);
if (periph == NULL)
return (ENXIO);
softc = (struct da_softc *)periph->softc;
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
("daopen: dev=%s (unit %d , partition %d)\n", devtoname(dev),
unit, part));
if ((error = cam_periph_lock(periph, PRIBIO|PCATCH)) != 0) {
return (error); /* error code from tsleep */
}
if (cam_periph_acquire(periph) != CAM_REQ_CMP)
return(ENXIO);
softc->flags |= DA_FLAG_OPEN;
s = splsoftcam();
if ((softc->flags & DA_FLAG_PACK_INVALID) != 0) {
/* Invalidate our pack information. */
disk_invalidate(&softc->disk);
softc->flags &= ~DA_FLAG_PACK_INVALID;
}
splx(s);
/* Do a read capacity */
{
struct scsi_read_capacity_data *rcap;
union ccb *ccb;
rcap = (struct scsi_read_capacity_data *)malloc(sizeof(*rcap),
M_TEMP,
M_WAITOK);
ccb = cam_periph_getccb(periph, /*priority*/1);
scsi_read_capacity(&ccb->csio,
/*retries*/1,
/*cbfncp*/dadone,
MSG_SIMPLE_Q_TAG,
rcap,
SSD_FULL_SIZE,
/*timeout*/60000);
ccb->ccb_h.ccb_bp = NULL;
error = cam_periph_runccb(ccb, daerror, /*cam_flags*/0,
/*sense_flags*/SF_RETRY_UA |
SF_RETRY_SELTO,
&softc->device_stats);
xpt_release_ccb(ccb);
if (error == 0) {
dasetgeom(periph, rcap);
}
free(rcap, M_TEMP);
}
if (error == 0) {
struct ccb_getdev cgd;
/* Build label for whole disk. */
label = &softc->disk.d_label;
bzero(label, sizeof(*label));
label->d_type = DTYPE_SCSI;
/*
* Grab the inquiry data to get the vendor and product names.
* Put them in the typename and packname for the label.
*/
xpt_setup_ccb(&cgd.ccb_h, periph->path, /*priority*/ 1);
cgd.ccb_h.func_code = XPT_GDEV_TYPE;
xpt_action((union ccb *)&cgd);
strncpy(label->d_typename, cgd.inq_data.vendor,
min(SID_VENDOR_SIZE, sizeof(label->d_typename)));
strncpy(label->d_packname, cgd.inq_data.product,
min(SID_PRODUCT_SIZE, sizeof(label->d_packname)));
label->d_secsize = softc->params.secsize;
label->d_nsectors = softc->params.secs_per_track;
label->d_ntracks = softc->params.heads;
label->d_ncylinders = softc->params.cylinders;
label->d_secpercyl = softc->params.heads
* softc->params.secs_per_track;
label->d_secperunit = softc->params.sectors;
if (((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0)) {
daprevent(periph, PR_PREVENT);
}
/*
* Check to see whether or not the blocksize is set yet.
* If it isn't, set it and then clear the blocksize
* unavailable flag for the device statistics.
*/
if ((softc->device_stats.flags & DEVSTAT_BS_UNAVAILABLE) != 0){
softc->device_stats.block_size = softc->params.secsize;
softc->device_stats.flags &= ~DEVSTAT_BS_UNAVAILABLE;
}
}
if (error != 0) {
if ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0) {
daprevent(periph, PR_ALLOW);
}
}
cam_periph_unlock(periph);
return (error);
}
static int
daclose(dev_t dev, int flag, int fmt, struct proc *p)
{
struct cam_periph *periph;
struct da_softc *softc;
int unit;
int error;
unit = dkunit(dev);
periph = cam_extend_get(daperiphs, unit);
if (periph == NULL)
return (ENXIO);
softc = (struct da_softc *)periph->softc;
if ((error = cam_periph_lock(periph, PRIBIO)) != 0) {
return (error); /* error code from tsleep */
}
if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) {
union ccb *ccb;
ccb = cam_periph_getccb(periph, /*priority*/1);
scsi_synchronize_cache(&ccb->csio,
/*retries*/1,
/*cbfcnp*/dadone,
MSG_SIMPLE_Q_TAG,
/*begin_lba*/0,/* Cover the whole disk */
/*lb_count*/0,
SSD_FULL_SIZE,
5 * 60 * 1000);
cam_periph_runccb(ccb, /*error_routine*/NULL, /*cam_flags*/0,
/*sense_flags*/SF_RETRY_UA,
&softc->device_stats);
if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
if ((ccb->ccb_h.status & CAM_STATUS_MASK) ==
CAM_SCSI_STATUS_ERROR) {
int asc, ascq;
int sense_key, error_code;
scsi_extract_sense(&ccb->csio.sense_data,
&error_code,
&sense_key,
&asc, &ascq);
if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
scsi_sense_print(&ccb->csio);
} else {
xpt_print_path(periph->path);
printf("Synchronize cache failed, status "
"== 0x%x, scsi status == 0x%x\n",
ccb->csio.ccb_h.status,
ccb->csio.scsi_status);
}
}
if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
cam_release_devq(ccb->ccb_h.path,
/*relsim_flags*/0,
/*reduction*/0,
/*timeout*/0,
/*getcount_only*/0);
xpt_release_ccb(ccb);
}
if ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0) {
daprevent(periph, PR_ALLOW);
/*
* If we've got removeable media, mark the blocksize as
* unavailable, since it could change when new media is
* inserted.
*/
softc->device_stats.flags |= DEVSTAT_BS_UNAVAILABLE;
}
softc->flags &= ~DA_FLAG_OPEN;
cam_periph_unlock(periph);
cam_periph_release(periph);
return (0);
}
/*
* Actually translate the requested transfer into one the physical driver
* can understand. The transfer is described by a buf and will include
* only one physical transfer.
*/
static void
dastrategy(struct bio *bp)
{
struct cam_periph *periph;
struct da_softc *softc;
u_int unit;
u_int part;
int s;
unit = dkunit(bp->bio_dev);
part = dkpart(bp->bio_dev);
periph = cam_extend_get(daperiphs, unit);
if (periph == NULL) {
bp->bio_error = ENXIO;
goto bad;
}
softc = (struct da_softc *)periph->softc;
#if 0
/*
* check it's not too big a transfer for our adapter
*/
scsi_minphys(bp,&sd_switch);
#endif
/*
* Mask interrupts so that the pack cannot be invalidated until
* after we are in the queue. Otherwise, we might not properly
* clean up one of the buffers.
*/
s = splbio();
/*
* If the device has been made invalid, error out
*/
if ((softc->flags & DA_FLAG_PACK_INVALID)) {
splx(s);
bp->bio_error = ENXIO;
goto bad;
}
/*
* Place it in the queue of disk activities for this disk
*/
bioqdisksort(&softc->bio_queue, bp);
splx(s);
/*
* Schedule ourselves for performing the work.
*/
xpt_schedule(periph, /* XXX priority */1);
return;
bad:
bp->bio_flags |= BIO_ERROR;
/*
* Correctly set the buf to indicate a completed xfer
*/
bp->bio_resid = bp->bio_bcount;
biodone(bp);
return;
}
/* For 2.2-stable support */
#ifndef ENOIOCTL
#define ENOIOCTL -1
#endif
static int
daioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
{
struct cam_periph *periph;
struct da_softc *softc;
int unit;
int error;
unit = dkunit(dev);
periph = cam_extend_get(daperiphs, unit);
if (periph == NULL)
return (ENXIO);
softc = (struct da_softc *)periph->softc;
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("daioctl\n"));
if ((error = cam_periph_lock(periph, PRIBIO|PCATCH)) != 0) {
return (error); /* error code from tsleep */
}
error = cam_periph_ioctl(periph, cmd, addr, daerror);
cam_periph_unlock(periph);
return (error);
}
static int
dadump(dev_t dev)
{
struct cam_periph *periph;
struct da_softc *softc;
u_int unit;
u_int part;
u_int secsize;
u_int num; /* number of sectors to write */
u_int blknum;
long blkcnt;
vm_offset_t addr;
struct ccb_scsiio csio;
int dumppages = MAXDUMPPGS;
int error;
int i;
/* toss any characters present prior to dump */
while (cncheckc() != -1)
;
unit = dkunit(dev);
part = dkpart(dev);
periph = cam_extend_get(daperiphs, unit);
if (periph == NULL) {
return (ENXIO);
}
softc = (struct da_softc *)periph->softc;
if ((softc->flags & DA_FLAG_PACK_INVALID) != 0)
return (ENXIO);
error = disk_dumpcheck(dev, &num, &blknum, &secsize);
if (error)
return (error);
addr = 0; /* starting address */
blkcnt = howmany(PAGE_SIZE, secsize);
while (num > 0) {
caddr_t va;
if ((num / blkcnt) < dumppages)
dumppages = num / blkcnt;
for (i = 0; i < dumppages; ++i) {
vm_offset_t a = addr + (i * PAGE_SIZE);
if (is_physical_memory(a))
va = pmap_kenter_temporary(trunc_page(a), i);
else
va = pmap_kenter_temporary(trunc_page(0), i);
}
xpt_setup_ccb(&csio.ccb_h, periph->path, /*priority*/1);
csio.ccb_h.ccb_state = DA_CCB_DUMP;
scsi_read_write(&csio,
/*retries*/1,
dadone,
MSG_ORDERED_Q_TAG,
/*read*/FALSE,
/*byte2*/0,
/*minimum_cmd_size*/ softc->minimum_cmd_size,
blknum,
blkcnt * dumppages,
/*data_ptr*/(u_int8_t *) va,
/*dxfer_len*/blkcnt * secsize * dumppages,
/*sense_len*/SSD_FULL_SIZE,
DA_DEFAULT_TIMEOUT * 1000);
xpt_polled_action((union ccb *)&csio);
if ((csio.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
printf("Aborting dump due to I/O error.\n");
if ((csio.ccb_h.status & CAM_STATUS_MASK) ==
CAM_SCSI_STATUS_ERROR)
scsi_sense_print(&csio);
else
printf("status == 0x%x, scsi status == 0x%x\n",
csio.ccb_h.status, csio.scsi_status);
return(EIO);
}
if (addr % (1024 * 1024) == 0) {
#ifdef HW_WDOG
if (wdog_tickler)
(*wdog_tickler)();
#endif /* HW_WDOG */
/* Count in MB of data left to write */
printf("%d ", (num * softc->params.secsize)
/ (1024 * 1024));
}
/* update block count */
num -= blkcnt * dumppages;
blknum += blkcnt * dumppages;
addr += PAGE_SIZE * dumppages;
/* operator aborting dump? */
if (cncheckc() != -1)
return (EINTR);
}
/*
* Sync the disk cache contents to the physical media.
*/
if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) {
xpt_setup_ccb(&csio.ccb_h, periph->path, /*priority*/1);
csio.ccb_h.ccb_state = DA_CCB_DUMP;
scsi_synchronize_cache(&csio,
/*retries*/1,
/*cbfcnp*/dadone,
MSG_SIMPLE_Q_TAG,
/*begin_lba*/0,/* Cover the whole disk */
/*lb_count*/0,
SSD_FULL_SIZE,
5 * 60 * 1000);
xpt_polled_action((union ccb *)&csio);
if ((csio.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
if ((csio.ccb_h.status & CAM_STATUS_MASK) ==
CAM_SCSI_STATUS_ERROR) {
int asc, ascq;
int sense_key, error_code;
scsi_extract_sense(&csio.sense_data,
&error_code,
&sense_key,
&asc, &ascq);
if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
scsi_sense_print(&csio);
} else {
xpt_print_path(periph->path);
printf("Synchronize cache failed, status "
"== 0x%x, scsi status == 0x%x\n",
csio.ccb_h.status, csio.scsi_status);
}
}
}
return (0);
}
static void
dainit(void)
{
cam_status status;
struct cam_path *path;
/*
* Create our extend array for storing the devices we attach to.
*/
daperiphs = cam_extend_new();
SLIST_INIT(&softc_list);
if (daperiphs == NULL) {
printf("da: Failed to alloc extend array!\n");
return;
}
/*
* Install a global async callback. This callback will
* receive async callbacks like "new device found".
*/
status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
if (status == CAM_REQ_CMP) {
struct ccb_setasync csa;
xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5);
csa.ccb_h.func_code = XPT_SASYNC_CB;
csa.event_enable = AC_FOUND_DEVICE;
csa.callback = daasync;
csa.callback_arg = NULL;
xpt_action((union ccb *)&csa);
status = csa.ccb_h.status;
xpt_free_path(path);
}
if (status != CAM_REQ_CMP) {
printf("da: Failed to attach master async callback "
"due to status 0x%x!\n", status);
} else {
/*
* Schedule a periodic event to occasioanly send an
* ordered tag to a device.
*/
timeout(dasendorderedtag, NULL,
(DA_DEFAULT_TIMEOUT * hz) / DA_ORDEREDTAG_INTERVAL);
/* Register our shutdown event handler */
if ((EVENTHANDLER_REGISTER(shutdown_post_sync, dashutdown,
NULL, SHUTDOWN_PRI_DEFAULT)) == NULL)
printf("dainit: shutdown event registration failed!\n");
}
}
static void
daoninvalidate(struct cam_periph *periph)
{
int s;
struct da_softc *softc;
struct bio *q_bp;
struct ccb_setasync csa;
softc = (struct da_softc *)periph->softc;
/*
* De-register any async callbacks.
*/
xpt_setup_ccb(&csa.ccb_h, periph->path,
/* priority */ 5);
csa.ccb_h.func_code = XPT_SASYNC_CB;
csa.event_enable = 0;
csa.callback = daasync;
csa.callback_arg = periph;
xpt_action((union ccb *)&csa);
softc->flags |= DA_FLAG_PACK_INVALID;
/*
* Although the oninvalidate() routines are always called at
* splsoftcam, we need to be at splbio() here to keep the buffer
* queue from being modified while we traverse it.
*/
s = splbio();
/*
* Return all queued I/O with ENXIO.
* XXX Handle any transactions queued to the card
* with XPT_ABORT_CCB.
*/
while ((q_bp = bioq_first(&softc->bio_queue)) != NULL){
bioq_remove(&softc->bio_queue, q_bp);
q_bp->bio_resid = q_bp->bio_bcount;
q_bp->bio_error = ENXIO;
q_bp->bio_flags |= BIO_ERROR;
biodone(q_bp);
}
splx(s);
SLIST_REMOVE(&softc_list, softc, da_softc, links);
xpt_print_path(periph->path);
printf("lost device\n");
}
static void
dacleanup(struct cam_periph *periph)
{
struct da_softc *softc;
softc = (struct da_softc *)periph->softc;
devstat_remove_entry(&softc->device_stats);
cam_extend_release(daperiphs, periph->unit_number);
xpt_print_path(periph->path);
printf("removing device entry\n");
free(softc, M_DEVBUF);
}
static void
daasync(void *callback_arg, u_int32_t code,
struct cam_path *path, void *arg)
{
struct cam_periph *periph;
periph = (struct cam_periph *)callback_arg;
switch (code) {
case AC_FOUND_DEVICE:
{
struct ccb_getdev *cgd;
cam_status status;
cgd = (struct ccb_getdev *)arg;
if (SID_TYPE(&cgd->inq_data) != T_DIRECT
&& SID_TYPE(&cgd->inq_data) != T_OPTICAL)
break;
/*
* Allocate a peripheral instance for
* this device and start the probe
* process.
*/
status = cam_periph_alloc(daregister, daoninvalidate,
dacleanup, dastart,
"da", CAM_PERIPH_BIO,
cgd->ccb_h.path, daasync,
AC_FOUND_DEVICE, cgd);
if (status != CAM_REQ_CMP
&& status != CAM_REQ_INPROG)
printf("daasync: Unable to attach to new device "
"due to status 0x%x\n", status);
break;
}
case AC_SENT_BDR:
case AC_BUS_RESET:
{
struct da_softc *softc;
struct ccb_hdr *ccbh;
int s;
softc = (struct da_softc *)periph->softc;
s = splsoftcam();
/*
* Don't fail on the expected unit attention
* that will occur.
*/
softc->flags |= DA_FLAG_RETRY_UA;
for (ccbh = LIST_FIRST(&softc->pending_ccbs);
ccbh != NULL; ccbh = LIST_NEXT(ccbh, periph_links.le))
ccbh->ccb_state |= DA_CCB_RETRY_UA;
splx(s);
/* FALLTHROUGH*/
}
default:
cam_periph_async(periph, code, path, arg);
break;
}
}
static cam_status
daregister(struct cam_periph *periph, void *arg)
{
int s;
struct da_softc *softc;
struct ccb_setasync csa;
struct ccb_getdev *cgd;
caddr_t match;
cgd = (struct ccb_getdev *)arg;
if (periph == NULL) {
printf("daregister: periph was NULL!!\n");
return(CAM_REQ_CMP_ERR);
}
if (cgd == NULL) {
printf("daregister: no getdev CCB, can't register device\n");
return(CAM_REQ_CMP_ERR);
}
softc = (struct da_softc *)malloc(sizeof(*softc),M_DEVBUF,M_NOWAIT);
if (softc == NULL) {
printf("daregister: Unable to probe new device. "
"Unable to allocate softc\n");
return(CAM_REQ_CMP_ERR);
}
bzero(softc, sizeof(*softc));
LIST_INIT(&softc->pending_ccbs);
softc->state = DA_STATE_PROBE;
bioq_init(&softc->bio_queue);
if (SID_IS_REMOVABLE(&cgd->inq_data))
softc->flags |= DA_FLAG_PACK_REMOVABLE;
if ((cgd->inq_data.flags & SID_CmdQue) != 0)
softc->flags |= DA_FLAG_TAGGED_QUEUING;
periph->softc = softc;
cam_extend_set(daperiphs, periph->unit_number, periph);
/*
* See if this device has any quirks.
*/
match = cam_quirkmatch((caddr_t)&cgd->inq_data,
(caddr_t)da_quirk_table,
sizeof(da_quirk_table)/sizeof(*da_quirk_table),
sizeof(*da_quirk_table), scsi_inquiry_match);
if (match != NULL)
softc->quirks = ((struct da_quirk_entry *)match)->quirks;
else
softc->quirks = DA_Q_NONE;
if (softc->quirks & DA_Q_NO_6_BYTE)
softc->minimum_cmd_size = 10;
else
softc->minimum_cmd_size = 6;
/*
* Block our timeout handler while we
* add this softc to the dev list.
*/
s = splsoftclock();
SLIST_INSERT_HEAD(&softc_list, softc, links);
splx(s);
/*
* The DA driver supports a blocksize, but
* we don't know the blocksize until we do
* a read capacity. So, set a flag to
* indicate that the blocksize is
* unavailable right now. We'll clear the
* flag as soon as we've done a read capacity.
*/
devstat_add_entry(&softc->device_stats, "da",
periph->unit_number, 0,
DEVSTAT_BS_UNAVAILABLE,
SID_TYPE(&cgd->inq_data) | DEVSTAT_TYPE_IF_SCSI,
DEVSTAT_PRIORITY_DISK);
/*
* Register this media as a disk
*/
disk_create(periph->unit_number, &softc->disk, 0,
&da_cdevsw, &dadisk_cdevsw);
/*
* Add async callbacks for bus reset and
* bus device reset calls. I don't bother
* checking if this fails as, in most cases,
* the system will function just fine without
* them and the only alternative would be to
* not attach the device on failure.
*/
xpt_setup_ccb(&csa.ccb_h, periph->path, /*priority*/5);
csa.ccb_h.func_code = XPT_SASYNC_CB;
csa.event_enable = AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE;
csa.callback = daasync;
csa.callback_arg = periph;
xpt_action((union ccb *)&csa);
/*
* Lock this peripheral until we are setup.
* This first call can't block
*/
(void)cam_periph_lock(periph, PRIBIO);
xpt_schedule(periph, /*priority*/5);
return(CAM_REQ_CMP);
}
static void
dastart(struct cam_periph *periph, union ccb *start_ccb)
{
struct da_softc *softc;
softc = (struct da_softc *)periph->softc;
switch (softc->state) {
case DA_STATE_NORMAL:
{
/* Pull a buffer from the queue and get going on it */
struct bio *bp;
int s;
/*
* See if there is a buf with work for us to do..
*/
s = splbio();
bp = bioq_first(&softc->bio_queue);
if (periph->immediate_priority <= periph->pinfo.priority) {
CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
("queuing for immediate ccb\n"));
start_ccb->ccb_h.ccb_state = DA_CCB_WAITING;
SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
periph_links.sle);
periph->immediate_priority = CAM_PRIORITY_NONE;
splx(s);
wakeup(&periph->ccb_list);
} else if (bp == NULL) {
splx(s);
xpt_release_ccb(start_ccb);
} else {
int oldspl;
u_int8_t tag_code;
bioq_remove(&softc->bio_queue, bp);
devstat_start_transaction(&softc->device_stats);
if ((bp->bio_flags & BIO_ORDERED) != 0
|| (softc->flags & DA_FLAG_NEED_OTAG) != 0) {
softc->flags &= ~DA_FLAG_NEED_OTAG;
softc->ordered_tag_count++;
tag_code = MSG_ORDERED_Q_TAG;
} else {
tag_code = MSG_SIMPLE_Q_TAG;
}
scsi_read_write(&start_ccb->csio,
/*retries*/4,
dadone,
tag_code,
bp->bio_cmd == BIO_READ,
/*byte2*/0,
softc->minimum_cmd_size,
bp->bio_pblkno,
bp->bio_bcount / softc->params.secsize,
bp->bio_data,
bp->bio_bcount,
/*sense_len*/SSD_FULL_SIZE,
DA_DEFAULT_TIMEOUT * 1000);
start_ccb->ccb_h.ccb_state = DA_CCB_BUFFER_IO;
/*
* Block out any asyncronous callbacks
* while we touch the pending ccb list.
*/
oldspl = splcam();
LIST_INSERT_HEAD(&softc->pending_ccbs,
&start_ccb->ccb_h, periph_links.le);
splx(oldspl);
/* We expect a unit attention from this device */
if ((softc->flags & DA_FLAG_RETRY_UA) != 0) {
start_ccb->ccb_h.ccb_state |= DA_CCB_RETRY_UA;
softc->flags &= ~DA_FLAG_RETRY_UA;
}
start_ccb->ccb_h.ccb_bp = bp;
bp = bioq_first(&softc->bio_queue);
splx(s);
xpt_action(start_ccb);
}
if (bp != NULL) {
/* Have more work to do, so ensure we stay scheduled */
xpt_schedule(periph, /* XXX priority */1);
}
break;
}
case DA_STATE_PROBE:
{
struct ccb_scsiio *csio;
struct scsi_read_capacity_data *rcap;
rcap = (struct scsi_read_capacity_data *)malloc(sizeof(*rcap),
M_TEMP,
M_NOWAIT);
if (rcap == NULL) {
printf("dastart: Couldn't malloc read_capacity data\n");
/* da_free_periph??? */
break;
}
csio = &start_ccb->csio;
scsi_read_capacity(csio,
/*retries*/4,
dadone,
MSG_SIMPLE_Q_TAG,
rcap,
SSD_FULL_SIZE,
/*timeout*/5000);
start_ccb->ccb_h.ccb_bp = NULL;
start_ccb->ccb_h.ccb_state = DA_CCB_PROBE;
xpt_action(start_ccb);
break;
}
}
}
static void
dadone(struct cam_periph *periph, union ccb *done_ccb)
{
struct da_softc *softc;
struct ccb_scsiio *csio;
softc = (struct da_softc *)periph->softc;
csio = &done_ccb->csio;
switch (csio->ccb_h.ccb_state & DA_CCB_TYPE_MASK) {
case DA_CCB_BUFFER_IO:
{
struct bio *bp;
int oldspl;
bp = (struct bio *)done_ccb->ccb_h.ccb_bp;
if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
int error;
int s;
int sf;
if ((csio->ccb_h.ccb_state & DA_CCB_RETRY_UA) != 0)
sf = SF_RETRY_UA;
else
sf = 0;
/* Retry selection timeouts */
sf |= SF_RETRY_SELTO;
if ((error = daerror(done_ccb, 0, sf)) == ERESTART) {
/*
* A retry was scheuled, so
* just return.
*/
return;
}
if (error != 0) {
struct bio *q_bp;
s = splbio();
if (error == ENXIO) {
/*
* Catastrophic error. Mark our pack as
* invalid.
*/
/* XXX See if this is really a media
* change first.
*/
xpt_print_path(periph->path);
printf("Invalidating pack\n");
softc->flags |= DA_FLAG_PACK_INVALID;
}
/*
* return all queued I/O with EIO, so that
* the client can retry these I/Os in the
* proper order should it attempt to recover.
*/
while ((q_bp = bioq_first(&softc->bio_queue))
!= NULL) {
bioq_remove(&softc->bio_queue, q_bp);
q_bp->bio_resid = q_bp->bio_bcount;
q_bp->bio_error = EIO;
q_bp->bio_flags |= BIO_ERROR;
biodone(q_bp);
}
splx(s);
bp->bio_error = error;
bp->bio_resid = bp->bio_bcount;
bp->bio_flags |= BIO_ERROR;
} else {
bp->bio_resid = csio->resid;
bp->bio_error = 0;
if (bp->bio_resid != 0) {
/* Short transfer ??? */
bp->bio_flags |= BIO_ERROR;
}
}
if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
cam_release_devq(done_ccb->ccb_h.path,
/*relsim_flags*/0,
/*reduction*/0,
/*timeout*/0,
/*getcount_only*/0);
} else {
bp->bio_resid = csio->resid;
if (csio->resid > 0)
bp->bio_flags |= BIO_ERROR;
}
/*
* Block out any asyncronous callbacks
* while we touch the pending ccb list.
*/
oldspl = splcam();
LIST_REMOVE(&done_ccb->ccb_h, periph_links.le);
splx(oldspl);
if (softc->device_stats.busy_count == 0)
softc->flags |= DA_FLAG_WENT_IDLE;
devstat_end_transaction_bio(&softc->device_stats, bp);
biodone(bp);
break;
}
case DA_CCB_PROBE:
{
struct scsi_read_capacity_data *rdcap;
char announce_buf[80];
rdcap = (struct scsi_read_capacity_data *)csio->data_ptr;
if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
struct disk_params *dp;
dasetgeom(periph, rdcap);
dp = &softc->params;
snprintf(announce_buf, sizeof(announce_buf),
"%luMB (%u %u byte sectors: %dH %dS/T %dC)",
(unsigned long) (((u_int64_t)dp->secsize *
dp->sectors) / (1024*1024)), dp->sectors,
dp->secsize, dp->heads, dp->secs_per_track,
dp->cylinders);
} else {
int error;
announce_buf[0] = '\0';
/*
* Retry any UNIT ATTENTION type errors. They
* are expected at boot.
*/
error = daerror(done_ccb, 0, SF_RETRY_UA |
SF_RETRY_SELTO | SF_NO_PRINT);
if (error == ERESTART) {
/*
* A retry was scheuled, so
* just return.
*/
return;
} else if (error != 0) {
struct scsi_sense_data *sense;
int asc, ascq;
int sense_key, error_code;
int have_sense;
cam_status status;
struct ccb_getdev cgd;
/* Don't wedge this device's queue */
cam_release_devq(done_ccb->ccb_h.path,
/*relsim_flags*/0,
/*reduction*/0,
/*timeout*/0,
/*getcount_only*/0);
status = done_ccb->ccb_h.status;
xpt_setup_ccb(&cgd.ccb_h,
done_ccb->ccb_h.path,
/* priority */ 1);
cgd.ccb_h.func_code = XPT_GDEV_TYPE;
xpt_action((union ccb *)&cgd);
if (((csio->ccb_h.flags & CAM_SENSE_PHYS) != 0)
|| ((csio->ccb_h.flags & CAM_SENSE_PTR) != 0)
|| ((status & CAM_AUTOSNS_VALID) == 0))
have_sense = FALSE;
else
have_sense = TRUE;
if (have_sense) {
sense = &csio->sense_data;
scsi_extract_sense(sense, &error_code,
&sense_key,
&asc, &ascq);
}
/*
* Attach to anything that claims to be a
* direct access or optical disk device,
* as long as it doesn't return a "Logical
* unit not supported" (0x25) error.
*/
if ((have_sense) && (asc != 0x25)
&& (error_code == SSD_CURRENT_ERROR))
snprintf(announce_buf,
sizeof(announce_buf),
"Attempt to query device "
"size failed: %s, %s",
scsi_sense_key_text[sense_key],
scsi_sense_desc(asc,ascq,
&cgd.inq_data));
else {
if (have_sense)
scsi_sense_print(
&done_ccb->csio);
else {
xpt_print_path(periph->path);
printf("got CAM status %#x\n",
done_ccb->ccb_h.status);
}
xpt_print_path(periph->path);
printf("fatal error, failed"
" to attach to device\n");
/*
* Free up resources.
*/
cam_periph_invalidate(periph);
}
}
}
free(rdcap, M_TEMP);
if (announce_buf[0] != '\0')
xpt_announce_periph(periph, announce_buf);
softc->state = DA_STATE_NORMAL;
/*
* Since our peripheral may be invalidated by an error
* above or an external event, we must release our CCB
* before releasing the probe lock on the peripheral.
* The peripheral will only go away once the last lock
* is removed, and we need it around for the CCB release
* operation.
*/
xpt_release_ccb(done_ccb);
cam_periph_unlock(periph);
return;
}
case DA_CCB_WAITING:
{
/* Caller will release the CCB */
wakeup(&done_ccb->ccb_h.cbfcnp);
return;
}
case DA_CCB_DUMP:
/* No-op. We're polling */
return;
default:
break;
}
xpt_release_ccb(done_ccb);
}
static int
daerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
{
struct da_softc *softc;
struct cam_periph *periph;
periph = xpt_path_periph(ccb->ccb_h.path);
softc = (struct da_softc *)periph->softc;
/*
* XXX
* Until we have a better way of doing pack validation,
* don't treat UAs as errors.
*/
sense_flags |= SF_RETRY_UA;
return(cam_periph_error(ccb, cam_flags, sense_flags,
&softc->saved_ccb));
}
static void
daprevent(struct cam_periph *periph, int action)
{
struct da_softc *softc;
union ccb *ccb;
int error;
softc = (struct da_softc *)periph->softc;
if (((action == PR_ALLOW)
&& (softc->flags & DA_FLAG_PACK_LOCKED) == 0)
|| ((action == PR_PREVENT)
&& (softc->flags & DA_FLAG_PACK_LOCKED) != 0)) {
return;
}
ccb = cam_periph_getccb(periph, /*priority*/1);
scsi_prevent(&ccb->csio,
/*retries*/1,
/*cbcfp*/dadone,
MSG_SIMPLE_Q_TAG,
action,
SSD_FULL_SIZE,
5000);
error = cam_periph_runccb(ccb, /*error_routine*/NULL, /*cam_flags*/0,
/*sense_flags*/0, &softc->device_stats);
if (error == 0) {
if (action == PR_ALLOW)
softc->flags &= ~DA_FLAG_PACK_LOCKED;
else
softc->flags |= DA_FLAG_PACK_LOCKED;
}
xpt_release_ccb(ccb);
}
static void
dasetgeom(struct cam_periph *periph, struct scsi_read_capacity_data * rdcap)
{
struct ccb_calc_geometry ccg;
struct da_softc *softc;
struct disk_params *dp;
softc = (struct da_softc *)periph->softc;
dp = &softc->params;
dp->secsize = scsi_4btoul(rdcap->length);
dp->sectors = scsi_4btoul(rdcap->addr) + 1;
/*
* Have the controller provide us with a geometry
* for this disk. The only time the geometry
* matters is when we boot and the controller
* is the only one knowledgeable enough to come
* up with something that will make this a bootable
* device.
*/
xpt_setup_ccb(&ccg.ccb_h, periph->path, /*priority*/1);
ccg.ccb_h.func_code = XPT_CALC_GEOMETRY;
ccg.block_size = dp->secsize;
ccg.volume_size = dp->sectors;
ccg.heads = 0;
ccg.secs_per_track = 0;
ccg.cylinders = 0;
xpt_action((union ccb*)&ccg);
dp->heads = ccg.heads;
dp->secs_per_track = ccg.secs_per_track;
dp->cylinders = ccg.cylinders;
}
static void
dasendorderedtag(void *arg)
{
struct da_softc *softc;
int s;
for (softc = SLIST_FIRST(&softc_list);
softc != NULL;
softc = SLIST_NEXT(softc, links)) {
s = splsoftcam();
if ((softc->ordered_tag_count == 0)
&& ((softc->flags & DA_FLAG_WENT_IDLE) == 0)) {
softc->flags |= DA_FLAG_NEED_OTAG;
}
if (softc->device_stats.busy_count > 0)
softc->flags &= ~DA_FLAG_WENT_IDLE;
softc->ordered_tag_count = 0;
splx(s);
}
/* Queue us up again */
timeout(dasendorderedtag, NULL,
(DA_DEFAULT_TIMEOUT * hz) / DA_ORDEREDTAG_INTERVAL);
}
/*
* Step through all DA peripheral drivers, and if the device is still open,
* sync the disk cache to physical media.
*/
static void
dashutdown(void * arg, int howto)
{
struct cam_periph *periph;
struct da_softc *softc;
for (periph = TAILQ_FIRST(&dadriver.units); periph != NULL;
periph = TAILQ_NEXT(periph, unit_links)) {
union ccb ccb;
softc = (struct da_softc *)periph->softc;
/*
* We only sync the cache if the drive is still open, and
* if the drive is capable of it..
*/
if (((softc->flags & DA_FLAG_OPEN) == 0)
|| (softc->quirks & DA_Q_NO_SYNC_CACHE))
continue;
xpt_setup_ccb(&ccb.ccb_h, periph->path, /*priority*/1);
ccb.ccb_h.ccb_state = DA_CCB_DUMP;
scsi_synchronize_cache(&ccb.csio,
/*retries*/1,
/*cbfcnp*/dadone,
MSG_SIMPLE_Q_TAG,
/*begin_lba*/0, /* whole disk */
/*lb_count*/0,
SSD_FULL_SIZE,
5 * 60 * 1000);
xpt_polled_action(&ccb);
if ((ccb.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
if (((ccb.ccb_h.status & CAM_STATUS_MASK) ==
CAM_SCSI_STATUS_ERROR)
&& (ccb.csio.scsi_status == SCSI_STATUS_CHECK_COND)){
int error_code, sense_key, asc, ascq;
scsi_extract_sense(&ccb.csio.sense_data,
&error_code, &sense_key,
&asc, &ascq);
if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
scsi_sense_print(&ccb.csio);
} else {
xpt_print_path(periph->path);
printf("Synchronize cache failed, status "
"== 0x%x, scsi status == 0x%x\n",
ccb.ccb_h.status, ccb.csio.scsi_status);
}
}
if ((ccb.ccb_h.status & CAM_DEV_QFRZN) != 0)
cam_release_devq(ccb.ccb_h.path,
/*relsim_flags*/0,
/*reduction*/0,
/*timeout*/0,
/*getcount_only*/0);
}
}
#else /* !_KERNEL */
/*
* XXX This is only left out of the kernel build to silence warnings. If,
* for some reason this function is used in the kernel, the ifdefs should
* be moved so it is included both in the kernel and userland.
*/
void
scsi_format_unit(struct ccb_scsiio *csio, u_int32_t retries,
void (*cbfcnp)(struct cam_periph *, union ccb *),
u_int8_t tag_action, u_int8_t byte2, u_int16_t ileave,
u_int8_t *data_ptr, u_int32_t dxfer_len, u_int8_t sense_len,
u_int32_t timeout)
{
struct scsi_format_unit *scsi_cmd;
scsi_cmd = (struct scsi_format_unit *)&csio->cdb_io.cdb_bytes;
scsi_cmd->opcode = FORMAT_UNIT;
scsi_cmd->byte2 = byte2;
scsi_ulto2b(ileave, scsi_cmd->interleave);
cam_fill_csio(csio,
retries,
cbfcnp,
/*flags*/ (dxfer_len > 0) ? CAM_DIR_OUT : CAM_DIR_NONE,
tag_action,
data_ptr,
dxfer_len,
sense_len,
sizeof(*scsi_cmd),
timeout);
}
#endif /* _KERNEL */
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