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freebsd-skq/sys/cam/scsi/scsi_da.c
ken 123c4e5742 Fix a problem with the way we handled device invalidation when attaching 
to a device failed.

In theory, the same steps that happen when we get an AC_LOST_DEVICE async
notification should have been taken when a driver fails to attach.  In
practice, that wasn't the case.

This only affected the da, cd and ch drivers, but the fix affects all
peripheral drivers.

There were several possible problems:
 - In the da driver, we didn't remove the peripheral's softc from the da
   driver's linked list of softcs.  Once the peripheral and softc got
   removed, we'd get a kernel panic the next time the timeout routine
   called dasendorderedtag().
 - In the da, cd and possibly ch drivers, we didn't remove the
   peripheral's devstat structure from the devstat queue.  Once the
   peripheral and softc were removed, this could cause a panic if anyone
   tried to access device statistics.  (one component of the linked list
   wouldn't exist anymore)
 - In the cd driver, we didn't take the peripheral off the changer run
   queue if it was scheduled to run.  In practice, it's highly unlikely,
   and maybe impossible that the peripheral would have been on the
   changer run queue at that stage of the probe process.

The fix is:
 - Add a new peripheral callback function (the "oninvalidate" function)
   that is called the first time cam_periph_invalidate() is called for a
   peripheral.

 - Create new foooninvalidate() routines for each peripheral driver.  This
   routine is always called at splsoftcam(), and contains all the stuff
   that used to be in the AC_LOST_DEVICE case of the async callback
   handler.

 - Move the devstat cleanup call to the destructor/cleanup routines, since
   some of the drivers do I/O in their close routines.

 - Make sure that when we're flushing the buffer queue, we traverse it at
   splbio().

 - Add a check for the invalid flag in the pt driver's open routine.

Reviewed by:	gibbs
1998-10-22 22:16:56 +00:00

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/*
* 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.
*
* $Id: scsi_da.c,v 1.11 1998/10/13 23:34:54 ken Exp $
*/
#include "opt_hw_wdog.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/buf.h>
#include <sys/devicestat.h>
#include <sys/dkbad.h>
#include <sys/disklabel.h>
#include <sys/diskslice.h>
#include <sys/malloc.h>
#include <sys/conf.h>
#include <machine/cons.h>
#include <machine/md_var.h>
#include <vm/vm.h>
#include <vm/vm_prot.h>
#include <vm/pmap.h>
#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>
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_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 buf_queue_head buf_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 ordered_tag_count;
struct disk_params params;
struct diskslices *dk_slices; /* virtual drives */
union ccb saved_ccb;
};
struct da_quirk_entry {
struct scsi_inquiry_pattern inq_pat;
da_quirks quirks;
};
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
},
{
/*
* 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
}
};
static d_open_t daopen;
static d_read_t daread;
static d_write_t dawrite;
static d_close_t daclose;
static d_strategy_t dastrategy;
static d_ioctl_t daioctl;
static d_dump_t dadump;
static d_psize_t dasize;
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(int howto, void *arg);
#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 =
{
/*d_open*/ daopen,
/*d_close*/ daclose,
/*d_read*/ daread,
/*d_write*/ dawrite,
/*d_ioctl*/ daioctl,
/*d_stop*/ nostop,
/*d_reset*/ noreset,
/*d_devtotty*/ nodevtotty,
/*d_poll*/ seltrue,
/*d_mmap*/ nommap,
/*d_strategy*/ dastrategy,
/*d_name*/ "da",
/*d_spare*/ NULL,
/*d_maj*/ -1,
/*d_dump*/ dadump,
/*d_psize*/ dasize,
/*d_flags*/ D_DISK,
/*d_maxio*/ 0,
/*b_maj*/ -1
};
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=0x%x (unit %d , partition %d)\n", dev,
unit, part));
if ((error = cam_periph_lock(periph, PRIBIO|PCATCH)) != 0) {
return (error); /* error code from tsleep */
}
if ((softc->flags & DA_FLAG_OPEN) == 0) {
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) {
/*
* If any partition is open, although the disk has
* been invalidated, disallow further opens.
*/
if (dsisopen(softc->dk_slices)) {
splx(s);
cam_periph_unlock(periph);
return (ENXIO);
}
/* Invalidate our pack information. */
dsgone(&softc->dk_slices);
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,
&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. */
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 ((dsisopen(softc->dk_slices) == 0)
&& ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0)) {
daprevent(periph, PR_PREVENT);
}
/* Initialize slice tables. */
error = dsopen("da", dev, fmt, 0, &softc->dk_slices, &label,
dastrategy, (ds_setgeom_t *)NULL,
&da_cdevsw);
/*
* 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 ((dsisopen(softc->dk_slices) == 0)
&& ((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 */
}
dsclose(dev, fmt, softc->dk_slices);
if (dsisopen(softc->dk_slices)) {
cam_periph_unlock(periph);
return (0);
}
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);
/* Ignore any errors */
cam_periph_runccb(ccb, /*error_routine*/NULL, /*cam_flags*/0,
/*sense_flags*/0, &softc->device_stats);
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);
}
static int
daread(dev_t dev, struct uio *uio, int ioflag)
{
return(physio(dastrategy, NULL, dev, 1, minphys, uio));
}
static int
dawrite(dev_t dev, struct uio *uio, int ioflag)
{
return(physio(dastrategy, NULL, dev, 0, minphys, uio));
}
/*
* 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 buf *bp)
{
struct cam_periph *periph;
struct da_softc *softc;
u_int unit;
u_int part;
int s;
unit = dkunit(bp->b_dev);
part = dkpart(bp->b_dev);
periph = cam_extend_get(daperiphs, unit);
if (periph == NULL) {
bp->b_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
/*
* Do bounds checking, adjust transfer, set b_cylin and b_pbklno.
*/
if (dscheck(bp, softc->dk_slices) <= 0)
goto done;
/*
* 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->b_error = ENXIO;
goto bad;
}
/*
* Place it in the queue of disk activities for this disk
*/
bufqdisksort(&softc->buf_queue, bp);
splx(s);
/*
* Schedule ourselves for performing the work.
*/
xpt_schedule(periph, /* XXX priority */1);
return;
bad:
bp->b_flags |= B_ERROR;
done:
/*
* Correctly set the buf to indicate a completed xfer
*/
bp->b_resid = bp->b_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 (cmd == DIOCSBAD)
return (EINVAL); /* XXX */
if ((error = cam_periph_lock(periph, PRIBIO|PCATCH)) != 0) {
return (error); /* error code from tsleep */
}
error = dsioctl("da", dev, cmd, addr, flag, &softc->dk_slices,
dastrategy, (ds_setgeom_t *)NULL);
if (error == ENOIOCTL)
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;
struct disklabel *lp;
u_int unit;
u_int part;
long num; /* number of sectors to write */
long blkoff;
long blknum;
long blkcnt;
char *addr;
static int dadoingadump = 0;
struct ccb_scsiio csio;
/* 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
|| (softc->dk_slices == NULL)
|| (lp = dsgetlabel(dev, softc->dk_slices)) == NULL)
return (ENXIO);
/* Size of memory to dump, in disk sectors. */
/* XXX Fix up for non DEV_BSIZE sectors!!! */
num = (u_long)Maxmem * PAGE_SIZE / softc->params.secsize;
blkoff = lp->d_partitions[part].p_offset;
blkoff += softc->dk_slices->dss_slices[dkslice(dev)].ds_offset;
/* check transfer bounds against partition size */
if ((dumplo < 0) || ((dumplo + num) > lp->d_partitions[part].p_size))
return (EINVAL);
if (dadoingadump != 0)
return (EFAULT);
dadoingadump = 1;
blknum = dumplo + blkoff;
blkcnt = PAGE_SIZE / softc->params.secsize;
addr = (char *)0; /* starting address */
while (num > 0) {
if (is_physical_memory((vm_offset_t)addr)) {
pmap_enter(kernel_pmap, (vm_offset_t)CADDR1,
trunc_page((vm_offset_t)addr), VM_PROT_READ, TRUE);
} else {
pmap_enter(kernel_pmap, (vm_offset_t)CADDR1,
trunc_page(0), VM_PROT_READ, TRUE);
}
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*/ 6,
blknum,
blkcnt,
/*data_ptr*/CADDR1,
/*dxfer_len*/blkcnt * softc->params.secsize,
/*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 ((intptr_t)addr % (1024 * 1024) == 0) {
#ifdef HW_WDOG
if (wdog_tickler)
(*wdog_tickler)();
#endif /* HW_WDOG */
/* Count in MB of data left to write */
printf("%ld ", (num * softc->params.secsize)
/ (1024 * 1024));
}
/* update block count */
num -= blkcnt;
blknum += blkcnt;
(long)addr += blkcnt * softc->params.secsize;
/* 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)
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 int
dasize(dev_t dev)
{
struct cam_periph *periph;
struct da_softc *softc;
periph = cam_extend_get(daperiphs, dkunit(dev));
if (periph == NULL)
return (ENXIO);
softc = (struct da_softc *)periph->softc;
return (dssize(dev, &softc->dk_slices, daopen, daclose));
}
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 {
int err;
/* If we were successfull, register our devsw */
cdevsw_add_generic(DA_BDEV_MAJOR, DA_CDEV_MAJOR, &da_cdevsw);
/*
* Schedule a periodic event to occasioanly send an
* ordered tag to a device.
*/
timeout(dasendorderedtag, NULL,
(DA_DEFAULT_TIMEOUT * hz) / DA_ORDEREDTAG_INTERVAL);
if ((err = at_shutdown(dashutdown, NULL,
SHUTDOWN_POST_SYNC)) != 0)
printf("dainit: at_shutdown returned %d!\n", err);
}
}
static void
daoninvalidate(struct cam_periph *periph)
{
int s;
struct da_softc *softc;
struct buf *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 = bufq_first(&softc->buf_queue)) != NULL){
bufq_remove(&softc->buf_queue, q_bp);
q_bp->b_resid = q_bp->b_bcount;
q_bp->b_error = ENXIO;
q_bp->b_flags |= B_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 ((cgd->pd_type != T_DIRECT) && (cgd->pd_type != 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_LOST_DEVICE:
cam_periph_invalidate(periph);
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);
break;
}
case AC_TRANSFER_NEG:
case AC_SCSI_AEN:
case AC_UNSOL_RESEL:
default:
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;
bufq_init(&softc->buf_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;
/*
* 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,
cgd->pd_type | DEVSTAT_TYPE_IF_SCSI);
/*
* 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 buf *bp;
int s;
/*
* See if there is a buf with work for us to do..
*/
s = splbio();
bp = bufq_first(&softc->buf_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;
bufq_remove(&softc->buf_queue, bp);
devstat_start_transaction(&softc->device_stats);
if ((bp->b_flags & B_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->b_flags & B_READ,
/*byte2*/0,
/*minimum_cmd_size*/ 6,
bp->b_pblkno,
bp->b_bcount / softc->params.secsize,
bp->b_data,
bp->b_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 = bufq_first(&softc->buf_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 buf *bp;
int oldspl;
bp = (struct buf *)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;
if ((error = daerror(done_ccb, 0, sf)) == ERESTART) {
/*
* A retry was scheuled, so
* just return.
*/
return;
}
if (error != 0) {
struct buf *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 = bufq_first(&softc->buf_queue))
!= NULL) {
bufq_remove(&softc->buf_queue, q_bp);
q_bp->b_resid = q_bp->b_bcount;
q_bp->b_error = EIO;
q_bp->b_flags |= B_ERROR;
biodone(q_bp);
}
splx(s);
bp->b_error = error;
bp->b_resid = bp->b_bcount;
bp->b_flags |= B_ERROR;
} else {
bp->b_resid = csio->resid;
bp->b_error = 0;
if (bp->b_resid != 0) {
/* Short transfer ??? */
bp->b_flags |= B_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->b_resid = csio->resid;
if (csio->resid > 0)
bp->b_flags |= B_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);
devstat_end_transaction(&softc->device_stats,
bp->b_bcount - bp->b_resid,
done_ccb->csio.tag_action & 0xf,
(bp->b_flags & B_READ) ? DEVSTAT_READ
: DEVSTAT_WRITE);
if (softc->device_stats.busy_count == 0)
softc->flags |= DA_FLAG_WENT_IDLE;
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;
sprintf(announce_buf,
"%ldMB (%d %d byte sectors: %dH %dS/T %dC)",
dp->sectors / ((1024L * 1024L) / dp->secsize),
dp->sectors, dp->secsize, dp->heads,
dp->secs_per_track, dp->cylinders);
} else {
int error;
/*
* Retry any UNIT ATTENTION type errors. They
* are expected at boot.
*/
error = daerror(done_ccb, 0, SF_RETRY_UA|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);
}
/*
* With removable media devices, we expect
* 0x3a (Medium not present) errors, since not
* everyone leaves a disk in the drive. If
* the error is anything else, though, we
* shouldn't attach.
*/
if ((have_sense) && (asc == 0x3a)
&& (error_code == SSD_CURRENT_ERROR))
sprintf(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);
announce_buf[0] = '\0';
}
}
}
free(rdcap, M_TEMP);
if (announce_buf[0] != '\0')
xpt_announce_periph(periph, announce_buf);
softc->state = DA_STATE_NORMAL;
cam_periph_unlock(periph);
break;
}
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;
}
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(int howto, void *arg)
{
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);
}
}
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