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freebsd-dev/sys/cam/ctl/scsi_ctl.c
Alexander Motin 227d67aa54 Merge CAM locking changes from the projects/camlock branch to radically 
reduce lock congestion and improve SMP scalability of the SCSI/ATA stack,
preparing the ground for the coming next GEOM direct dispatch support.

Replace big per-SIM locks with bunch of smaller ones:
 - per-LUN locks to protect device and peripheral drivers state;
 - per-target locks to protect list of LUNs on target;
 - per-bus locks to protect reference counting;
 - per-send queue locks to protect queue of CCBs to be sent;
 - per-done queue locks to protect queue of completed CCBs;
 - remaining per-SIM locks now protect only HBA driver internals.

While holding LUN lock it is allowed (while not recommended for performance
reasons) to take SIM lock.  The opposite acquisition order is forbidden.
All the other locks are leaf locks, that can be taken anywhere, but should
not be cascaded.  Many functions, such as: xpt_action(), xpt_done(),
xpt_async(), xpt_create_path(), etc. are no longer require (but allow) SIM
lock to be held.

To keep compatibility and solve cases where SIM lock can't be dropped, all
xpt_async() calls in addition to xpt_done() calls are queued to completion
threads for async processing in clean environment without SIM lock held.

Instead of single CAM SWI thread, used for commands completion processing
before, use multiple (depending on number of CPUs) threads.  Load balanced
between them using "hash" of the device B:T:L address.

HBA drivers that can drop SIM lock during completion processing and have
sufficient number of completion threads to efficiently scale to multiple
CPUs can use new function xpt_done_direct() to avoid extra context switch.
Make ahci(4) driver to use this mechanism depending on hardware setup.

Sponsored by:	iXsystems, Inc.
MFC after:	2 months
2013-10-21 12:00:26 +00:00

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/*-
* Copyright (c) 2008, 2009 Silicon Graphics International Corp.
* 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.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
*
* $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/scsi_ctl.c#4 $
*/
/*
* Peripheral driver interface between CAM and CTL (CAM Target Layer).
*
* Author: Ken Merry <ken@FreeBSD.org>
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#include <sys/malloc.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/sbuf.h>
#include <sys/sysctl.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <machine/bus.h>
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_periph.h>
#include <cam/cam_queue.h>
#include <cam/cam_xpt_periph.h>
#include <cam/cam_debug.h>
#include <cam/cam_sim.h>
#include <cam/cam_xpt.h>
#include <cam/scsi/scsi_all.h>
#include <cam/scsi/scsi_message.h>
#include <cam/ctl/ctl_io.h>
#include <cam/ctl/ctl.h>
#include <cam/ctl/ctl_frontend.h>
#include <cam/ctl/ctl_util.h>
#include <cam/ctl/ctl_error.h>
typedef enum {
CTLFE_CCB_DEFAULT = 0x00
} ctlfe_ccb_types;
struct ctlfe_softc {
struct ctl_frontend fe;
path_id_t path_id;
struct cam_sim *sim;
char port_name[DEV_IDLEN];
struct mtx lun_softc_mtx;
STAILQ_HEAD(, ctlfe_lun_softc) lun_softc_list;
STAILQ_ENTRY(ctlfe_softc) links;
};
STAILQ_HEAD(, ctlfe_softc) ctlfe_softc_list;
struct mtx ctlfe_list_mtx;
static char ctlfe_mtx_desc[] = "ctlfelist";
static int ctlfe_dma_enabled = 1;
#ifdef CTLFE_INIT_ENABLE
static int ctlfe_max_targets = 1;
static int ctlfe_num_targets = 0;
#endif
typedef enum {
CTLFE_LUN_NONE = 0x00,
CTLFE_LUN_WILDCARD = 0x01
} ctlfe_lun_flags;
struct ctlfe_lun_softc {
struct ctlfe_softc *parent_softc;
struct cam_periph *periph;
ctlfe_lun_flags flags;
struct callout dma_callout;
uint64_t ccbs_alloced;
uint64_t ccbs_freed;
uint64_t ctios_sent;
uint64_t ctios_returned;
uint64_t atios_sent;
uint64_t atios_returned;
uint64_t inots_sent;
uint64_t inots_returned;
/* bus_dma_tag_t dma_tag; */
TAILQ_HEAD(, ccb_hdr) work_queue;
STAILQ_ENTRY(ctlfe_lun_softc) links;
};
typedef enum {
CTLFE_CMD_NONE = 0x00,
CTLFE_CMD_PIECEWISE = 0x01
} ctlfe_cmd_flags;
/*
* The size limit of this structure is CTL_PORT_PRIV_SIZE, from ctl_io.h.
* Currently that is 600 bytes.
*/
struct ctlfe_lun_cmd_info {
int cur_transfer_index;
ctlfe_cmd_flags flags;
/*
* XXX KDM struct bus_dma_segment is 8 bytes on i386, and 16
* bytes on amd64. So with 32 elements, this is 256 bytes on
* i386 and 512 bytes on amd64.
*/
bus_dma_segment_t cam_sglist[32];
};
/*
* When we register the adapter/bus, request that this many ctl_ios be
* allocated. This should be the maximum supported by the adapter, but we
* currently don't have a way to get that back from the path inquiry.
* XXX KDM add that to the path inquiry.
*/
#define CTLFE_REQ_CTL_IO 4096
/*
* Number of Accept Target I/O CCBs to allocate and queue down to the
* adapter per LUN.
* XXX KDM should this be controlled by CTL?
*/
#define CTLFE_ATIO_PER_LUN 1024
/*
* Number of Immediate Notify CCBs (used for aborts, resets, etc.) to
* allocate and queue down to the adapter per LUN.
* XXX KDM should this be controlled by CTL?
*/
#define CTLFE_IN_PER_LUN 1024
/*
* Timeout (in seconds) on CTIO CCB allocation for doing a DMA or sending
* status to the initiator. The SIM is expected to have its own timeouts,
* so we're not putting this timeout around the CCB execution time. The
* SIM should timeout and let us know if it has an issue.
*/
#define CTLFE_DMA_TIMEOUT 60
/*
* Turn this on to enable extra debugging prints.
*/
#if 0
#define CTLFE_DEBUG
#endif
/*
* Use randomly assigned WWNN/WWPN values. This is to work around an issue
* in the FreeBSD initiator that makes it unable to rescan the target if
* the target gets rebooted and the WWNN/WWPN stay the same.
*/
#if 0
#define RANDOM_WWNN
#endif
SYSCTL_INT(_kern_cam_ctl, OID_AUTO, dma_enabled, CTLFLAG_RW,
&ctlfe_dma_enabled, 0, "DMA enabled");
MALLOC_DEFINE(M_CTLFE, "CAM CTL FE", "CAM CTL FE interface");
#define ccb_type ppriv_field0
/* This is only used in the ATIO */
#define io_ptr ppriv_ptr1
/* This is only used in the CTIO */
#define ccb_atio ppriv_ptr1
int ctlfeinitialize(void);
void ctlfeshutdown(void);
static periph_init_t ctlfeinit;
static void ctlfeasync(void *callback_arg, uint32_t code,
struct cam_path *path, void *arg);
static periph_ctor_t ctlferegister;
static periph_oninv_t ctlfeoninvalidate;
static periph_dtor_t ctlfecleanup;
static periph_start_t ctlfestart;
static void ctlfedone(struct cam_periph *periph,
union ccb *done_ccb);
static void ctlfe_onoffline(void *arg, int online);
static void ctlfe_online(void *arg);
static void ctlfe_offline(void *arg);
static int ctlfe_targ_enable(void *arg, struct ctl_id targ_id);
static int ctlfe_targ_disable(void *arg, struct ctl_id targ_id);
static int ctlfe_lun_enable(void *arg, struct ctl_id targ_id,
int lun_id);
static int ctlfe_lun_disable(void *arg, struct ctl_id targ_id,
int lun_id);
static void ctlfe_dump_sim(struct cam_sim *sim);
static void ctlfe_dump_queue(struct ctlfe_lun_softc *softc);
static void ctlfe_dma_timeout(void *arg);
static void ctlfe_datamove_done(union ctl_io *io);
static void ctlfe_dump(void);
static struct periph_driver ctlfe_driver =
{
ctlfeinit, "ctl",
TAILQ_HEAD_INITIALIZER(ctlfe_driver.units), /*generation*/ 0
};
static int ctlfe_module_event_handler(module_t, int /*modeventtype_t*/, void *);
/*
* We're not using PERIPHDRIVER_DECLARE(), because it runs at SI_SUB_DRIVERS,
* and that happens before CTL gets initialised.
*/
static moduledata_t ctlfe_moduledata = {
"ctlfe",
ctlfe_module_event_handler,
NULL
};
DECLARE_MODULE(ctlfe, ctlfe_moduledata, SI_SUB_CONFIGURE, SI_ORDER_FOURTH);
MODULE_VERSION(ctlfe, 1);
MODULE_DEPEND(ctlfe, ctl, 1, 1, 1);
MODULE_DEPEND(ctlfe, cam, 1, 1, 1);
extern struct ctl_softc *control_softc;
void
ctlfeshutdown(void)
{
return;
}
void
ctlfeinit(void)
{
cam_status status;
STAILQ_INIT(&ctlfe_softc_list);
mtx_init(&ctlfe_list_mtx, ctlfe_mtx_desc, NULL, MTX_DEF);
KASSERT(control_softc != NULL, ("CTL is not initialized!"));
status = xpt_register_async(AC_PATH_REGISTERED | AC_PATH_DEREGISTERED |
AC_CONTRACT, ctlfeasync, NULL, NULL);
if (status != CAM_REQ_CMP) {
printf("ctl: Failed to attach async callback due to CAM "
"status 0x%x!\n", status);
}
}
static int
ctlfe_module_event_handler(module_t mod, int what, void *arg)
{
switch (what) {
case MOD_LOAD:
periphdriver_register(&ctlfe_driver);
return (0);
case MOD_UNLOAD:
return (EBUSY);
default:
return (EOPNOTSUPP);
}
}
static void
ctlfeasync(void *callback_arg, uint32_t code, struct cam_path *path, void *arg)
{
#ifdef CTLFEDEBUG
printf("%s: entered\n", __func__);
#endif
/*
* When a new path gets registered, and it is capable of target
* mode, go ahead and attach. Later on, we may need to be more
* selective, but for now this will be sufficient.
*/
switch (code) {
case AC_PATH_REGISTERED: {
struct ctl_frontend *fe;
struct ctlfe_softc *bus_softc;
struct ccb_pathinq *cpi;
int retval;
cpi = (struct ccb_pathinq *)arg;
/* Don't attach if it doesn't support target mode */
if ((cpi->target_sprt & PIT_PROCESSOR) == 0) {
#ifdef CTLFEDEBUG
printf("%s: SIM %s%d doesn't support target mode\n",
__func__, cpi->dev_name, cpi->unit_number);
#endif
break;
}
#ifdef CTLFE_INIT_ENABLE
if (ctlfe_num_targets >= ctlfe_max_targets) {
union ccb *ccb;
ccb = (union ccb *)malloc(sizeof(*ccb), M_TEMP,
M_NOWAIT | M_ZERO);
if (ccb == NULL) {
printf("%s: unable to malloc CCB!\n", __func__);
return;
}
xpt_setup_ccb(&ccb->ccb_h, path, CAM_PRIORITY_NONE);
ccb->ccb_h.func_code = XPT_SET_SIM_KNOB;
ccb->knob.xport_specific.valid = KNOB_VALID_ROLE;
ccb->knob.xport_specific.fc.role = KNOB_ROLE_INITIATOR;
xpt_action(ccb);
if ((ccb->ccb_h.status & CAM_STATUS_MASK) !=
CAM_REQ_CMP) {
printf("%s: SIM %s%d (path id %d) initiator "
"enable failed with status %#x\n",
__func__, cpi->dev_name,
cpi->unit_number, cpi->ccb_h.path_id,
ccb->ccb_h.status);
} else {
printf("%s: SIM %s%d (path id %d) initiator "
"enable succeeded\n",
__func__, cpi->dev_name,
cpi->unit_number, cpi->ccb_h.path_id);
}
free(ccb, M_TEMP);
break;
} else {
ctlfe_num_targets++;
}
printf("%s: ctlfe_num_targets = %d\n", __func__,
ctlfe_num_targets);
#endif /* CTLFE_INIT_ENABLE */
/*
* We're in an interrupt context here, so we have to
* use M_NOWAIT. Of course this means trouble if we
* can't allocate memory.
*/
bus_softc = malloc(sizeof(*bus_softc), M_CTLFE,
M_NOWAIT | M_ZERO);
if (bus_softc == NULL) {
printf("%s: unable to malloc %zd bytes for softc\n",
__func__, sizeof(*bus_softc));
return;
}
bus_softc->path_id = cpi->ccb_h.path_id;
bus_softc->sim = xpt_path_sim(path);
mtx_init(&bus_softc->lun_softc_mtx, "LUN softc mtx", NULL,
MTX_DEF);
STAILQ_INIT(&bus_softc->lun_softc_list);
fe = &bus_softc->fe;
/*
* XXX KDM should we be more accurate here ?
*/
if (cpi->transport == XPORT_FC)
fe->port_type = CTL_PORT_FC;
else
fe->port_type = CTL_PORT_SCSI;
/* XXX KDM what should the real number be here? */
fe->num_requested_ctl_io = 4096;
snprintf(bus_softc->port_name, sizeof(bus_softc->port_name),
"%s%d", cpi->dev_name, cpi->unit_number);
/*
* XXX KDM it would be nice to allocate storage in the
* frontend structure itself.
*/
fe->port_name = bus_softc->port_name;
fe->physical_port = cpi->unit_number;
fe->virtual_port = cpi->bus_id;
fe->port_online = ctlfe_online;
fe->port_offline = ctlfe_offline;
fe->onoff_arg = bus_softc;
fe->targ_enable = ctlfe_targ_enable;
fe->targ_disable = ctlfe_targ_disable;
fe->lun_enable = ctlfe_lun_enable;
fe->lun_disable = ctlfe_lun_disable;
fe->targ_lun_arg = bus_softc;
fe->fe_datamove = ctlfe_datamove_done;
fe->fe_done = ctlfe_datamove_done;
fe->fe_dump = ctlfe_dump;
/*
* XXX KDM the path inquiry doesn't give us the maximum
* number of targets supported.
*/
fe->max_targets = cpi->max_target;
fe->max_target_id = cpi->max_target;
/*
* XXX KDM need to figure out whether we're the master or
* slave.
*/
#ifdef CTLFEDEBUG
printf("%s: calling ctl_frontend_register() for %s%d\n",
__func__, cpi->dev_name, cpi->unit_number);
#endif
retval = ctl_frontend_register(fe, /*master_SC*/ 1);
if (retval != 0) {
printf("%s: ctl_frontend_register() failed with "
"error %d!\n", __func__, retval);
mtx_destroy(&bus_softc->lun_softc_mtx);
free(bus_softc, M_CTLFE);
break;
} else {
mtx_lock(&ctlfe_list_mtx);
STAILQ_INSERT_TAIL(&ctlfe_softc_list, bus_softc, links);
mtx_unlock(&ctlfe_list_mtx);
}
break;
}
case AC_PATH_DEREGISTERED: {
struct ctlfe_softc *softc = NULL;
mtx_lock(&ctlfe_list_mtx);
STAILQ_FOREACH(softc, &ctlfe_softc_list, links) {
if (softc->path_id == xpt_path_path_id(path)) {
STAILQ_REMOVE(&ctlfe_softc_list, softc,
ctlfe_softc, links);
break;
}
}
mtx_unlock(&ctlfe_list_mtx);
if (softc != NULL) {
/*
* XXX KDM are we certain at this point that there
* are no outstanding commands for this frontend?
*/
ctl_frontend_deregister(&softc->fe);
mtx_destroy(&softc->lun_softc_mtx);
free(softc, M_CTLFE);
}
break;
}
case AC_CONTRACT: {
struct ac_contract *ac;
ac = (struct ac_contract *)arg;
switch (ac->contract_number) {
case AC_CONTRACT_DEV_CHG: {
struct ac_device_changed *dev_chg;
struct ctlfe_softc *softc;
int retval, found;
dev_chg = (struct ac_device_changed *)ac->contract_data;
printf("%s: WWPN %#jx port 0x%06x path %u target %u %s\n",
__func__, dev_chg->wwpn, dev_chg->port,
xpt_path_path_id(path), dev_chg->target,
(dev_chg->arrived == 0) ? "left" : "arrived");
found = 0;
mtx_lock(&ctlfe_list_mtx);
STAILQ_FOREACH(softc, &ctlfe_softc_list, links) {
if (softc->path_id == xpt_path_path_id(path)) {
found = 1;
break;
}
}
mtx_unlock(&ctlfe_list_mtx);
if (found == 0) {
printf("%s: CTL port for CAM path %u not "
"found!\n", __func__,
xpt_path_path_id(path));
break;
}
if (dev_chg->arrived != 0) {
retval = ctl_add_initiator(dev_chg->wwpn,
softc->fe.targ_port, dev_chg->target);
} else {
retval = ctl_remove_initiator(
softc->fe.targ_port, dev_chg->target);
}
if (retval != 0) {
printf("%s: could not %s port %d iid %u "
"WWPN %#jx!\n", __func__,
(dev_chg->arrived != 0) ? "add" :
"remove", softc->fe.targ_port,
dev_chg->target,
(uintmax_t)dev_chg->wwpn);
}
break;
}
default:
printf("%s: unsupported contract number %ju\n",
__func__, (uintmax_t)ac->contract_number);
break;
}
break;
}
default:
break;
}
}
static cam_status
ctlferegister(struct cam_periph *periph, void *arg)
{
struct ctlfe_softc *bus_softc;
struct ctlfe_lun_softc *softc;
union ccb en_lun_ccb;
cam_status status;
int i;
softc = (struct ctlfe_lun_softc *)arg;
bus_softc = softc->parent_softc;
TAILQ_INIT(&softc->work_queue);
softc->periph = periph;
callout_init_mtx(&softc->dma_callout, xpt_path_mtx(periph->path),
/*flags*/ 0);
periph->softc = softc;
xpt_setup_ccb(&en_lun_ccb.ccb_h, periph->path, CAM_PRIORITY_NONE);
en_lun_ccb.ccb_h.func_code = XPT_EN_LUN;
en_lun_ccb.cel.grp6_len = 0;
en_lun_ccb.cel.grp7_len = 0;
en_lun_ccb.cel.enable = 1;
xpt_action(&en_lun_ccb);
status = (en_lun_ccb.ccb_h.status & CAM_STATUS_MASK);
if (status != CAM_REQ_CMP) {
xpt_print(periph->path, "%s: Enable LUN failed, status 0x%x\n",
__func__, en_lun_ccb.ccb_h.status);
return (status);
}
status = CAM_REQ_CMP;
for (i = 0; i < CTLFE_ATIO_PER_LUN; i++) {
union ccb *new_ccb;
new_ccb = (union ccb *)malloc(sizeof(*new_ccb), M_CTLFE,
M_ZERO|M_NOWAIT);
if (new_ccb == NULL) {
status = CAM_RESRC_UNAVAIL;
break;
}
xpt_setup_ccb(&new_ccb->ccb_h, periph->path, /*priority*/ 1);
new_ccb->ccb_h.func_code = XPT_ACCEPT_TARGET_IO;
new_ccb->ccb_h.cbfcnp = ctlfedone;
new_ccb->ccb_h.flags |= CAM_UNLOCKED;
xpt_action(new_ccb);
softc->atios_sent++;
status = new_ccb->ccb_h.status;
if ((status & CAM_STATUS_MASK) != CAM_REQ_INPROG) {
free(new_ccb, M_CTLFE);
break;
}
}
status = cam_periph_acquire(periph);
if ((status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
xpt_print(periph->path, "%s: could not acquire reference "
"count, status = %#x\n", __func__, status);
return (status);
}
if (i == 0) {
xpt_print(periph->path, "%s: could not allocate ATIO CCBs, "
"status 0x%x\n", __func__, status);
return (CAM_REQ_CMP_ERR);
}
for (i = 0; i < CTLFE_IN_PER_LUN; i++) {
union ccb *new_ccb;
new_ccb = (union ccb *)malloc(sizeof(*new_ccb), M_CTLFE,
M_ZERO|M_NOWAIT);
if (new_ccb == NULL) {
status = CAM_RESRC_UNAVAIL;
break;
}
xpt_setup_ccb(&new_ccb->ccb_h, periph->path, /*priority*/ 1);
new_ccb->ccb_h.func_code = XPT_IMMEDIATE_NOTIFY;
new_ccb->ccb_h.cbfcnp = ctlfedone;
new_ccb->ccb_h.flags |= CAM_UNLOCKED;
xpt_action(new_ccb);
softc->inots_sent++;
status = new_ccb->ccb_h.status;
if ((status & CAM_STATUS_MASK) != CAM_REQ_INPROG) {
/*
* Note that we don't free the CCB here. If the
* status is not CAM_REQ_INPROG, then we're
* probably talking to a SIM that says it is
* target-capable but doesn't support the
* XPT_IMMEDIATE_NOTIFY CCB. i.e. it supports the
* older API. In that case, it'll call xpt_done()
* on the CCB, and we need to free it in our done
* routine as a result.
*/
break;
}
}
if ((i == 0)
|| (status != CAM_REQ_INPROG)) {
xpt_print(periph->path, "%s: could not allocate immediate "
"notify CCBs, status 0x%x\n", __func__, status);
return (CAM_REQ_CMP_ERR);
}
return (CAM_REQ_CMP);
}
static void
ctlfeoninvalidate(struct cam_periph *periph)
{
union ccb en_lun_ccb;
cam_status status;
struct ctlfe_softc *bus_softc;
struct ctlfe_lun_softc *softc;
softc = (struct ctlfe_lun_softc *)periph->softc;
xpt_setup_ccb(&en_lun_ccb.ccb_h, periph->path, CAM_PRIORITY_NONE);
en_lun_ccb.ccb_h.func_code = XPT_EN_LUN;
en_lun_ccb.cel.grp6_len = 0;
en_lun_ccb.cel.grp7_len = 0;
en_lun_ccb.cel.enable = 0;
xpt_action(&en_lun_ccb);
status = (en_lun_ccb.ccb_h.status & CAM_STATUS_MASK);
if (status != CAM_REQ_CMP) {
xpt_print(periph->path, "%s: Disable LUN failed, status 0x%x\n",
__func__, en_lun_ccb.ccb_h.status);
/*
* XXX KDM what do we do now?
*/
}
xpt_print(periph->path, "LUN removed, %ju ATIOs outstanding, %ju "
"INOTs outstanding, %d refs\n", softc->atios_sent -
softc->atios_returned, softc->inots_sent -
softc->inots_returned, periph->refcount);
bus_softc = softc->parent_softc;
mtx_lock(&bus_softc->lun_softc_mtx);
STAILQ_REMOVE(&bus_softc->lun_softc_list, softc, ctlfe_lun_softc, links);
mtx_unlock(&bus_softc->lun_softc_mtx);
}
static void
ctlfecleanup(struct cam_periph *periph)
{
struct ctlfe_lun_softc *softc;
xpt_print(periph->path, "%s: Called\n", __func__);
softc = (struct ctlfe_lun_softc *)periph->softc;
/*
* XXX KDM is there anything else that needs to be done here?
*/
callout_stop(&softc->dma_callout);
free(softc, M_CTLFE);
}
static void
ctlfestart(struct cam_periph *periph, union ccb *start_ccb)
{
struct ctlfe_lun_softc *softc;
struct ccb_hdr *ccb_h;
softc = (struct ctlfe_lun_softc *)periph->softc;
softc->ccbs_alloced++;
start_ccb->ccb_h.ccb_type = CTLFE_CCB_DEFAULT;
ccb_h = TAILQ_FIRST(&softc->work_queue);
if (ccb_h == NULL) {
softc->ccbs_freed++;
xpt_release_ccb(start_ccb);
} else {
struct ccb_accept_tio *atio;
struct ccb_scsiio *csio;
uint8_t *data_ptr;
uint32_t dxfer_len;
ccb_flags flags;
union ctl_io *io;
uint8_t scsi_status;
/* Take the ATIO off the work queue */
TAILQ_REMOVE(&softc->work_queue, ccb_h, periph_links.tqe);
atio = (struct ccb_accept_tio *)ccb_h;
io = (union ctl_io *)ccb_h->io_ptr;
csio = &start_ccb->csio;
flags = atio->ccb_h.flags &
(CAM_DIS_DISCONNECT|CAM_TAG_ACTION_VALID|CAM_DIR_MASK);
if ((io == NULL)
|| (io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE) {
/*
* We're done, send status back.
*/
flags |= CAM_SEND_STATUS;
if (io == NULL) {
scsi_status = SCSI_STATUS_BUSY;
csio->sense_len = 0;
} else if ((io->io_hdr.status & CTL_STATUS_MASK) ==
CTL_CMD_ABORTED) {
io->io_hdr.flags &= ~CTL_FLAG_STATUS_QUEUED;
/*
* If this command was aborted, we don't
* need to send status back to the SIM.
* Just free the CTIO and ctl_io, and
* recycle the ATIO back to the SIM.
*/
xpt_print(periph->path, "%s: aborted "
"command 0x%04x discarded\n",
__func__, io->scsiio.tag_num);
ctl_free_io(io);
/*
* For a wildcard attachment, commands can
* come in with a specific target/lun. Reset
* the target and LUN fields back to the
* wildcard values before we send them back
* down to the SIM. The SIM has a wildcard
* LUN enabled, not whatever target/lun
* these happened to be.
*/
if (softc->flags & CTLFE_LUN_WILDCARD) {
atio->ccb_h.target_id =
CAM_TARGET_WILDCARD;
atio->ccb_h.target_lun =
CAM_LUN_WILDCARD;
}
if ((atio->ccb_h.status & CAM_DEV_QFRZN) != 0) {
cam_release_devq(periph->path,
/*relsim_flags*/0,
/*reduction*/0,
/*timeout*/0,
/*getcount_only*/0);
atio->ccb_h.status &= ~CAM_DEV_QFRZN;
}
ccb_h = TAILQ_FIRST(&softc->work_queue);
if (atio->ccb_h.func_code !=
XPT_ACCEPT_TARGET_IO) {
xpt_print(periph->path, "%s: func_code "
"is %#x\n", __func__,
atio->ccb_h.func_code);
}
start_ccb->ccb_h.func_code = XPT_ABORT;
start_ccb->cab.abort_ccb = (union ccb *)atio;
/* Tell the SIM that we've aborted this ATIO */
xpt_action(start_ccb);
softc->ccbs_freed++;
xpt_release_ccb(start_ccb);
/*
* Send the ATIO back down to the SIM.
*/
xpt_action((union ccb *)atio);
softc->atios_sent++;
/*
* If we still have work to do, ask for
* another CCB. Otherwise, deactivate our
* callout.
*/
if (ccb_h != NULL)
xpt_schedule(periph, /*priority*/ 1);
else
callout_stop(&softc->dma_callout);
return;
} else {
io->io_hdr.flags &= ~CTL_FLAG_STATUS_QUEUED;
scsi_status = io->scsiio.scsi_status;
csio->sense_len = io->scsiio.sense_len;
}
data_ptr = NULL;
dxfer_len = 0;
if (io == NULL) {
printf("%s: tag %04x io is NULL\n", __func__,
atio->tag_id);
} else {
#ifdef CTLFEDEBUG
printf("%s: tag %04x status %x\n", __func__,
atio->tag_id, io->io_hdr.status);
#endif
}
csio->sglist_cnt = 0;
if (csio->sense_len != 0) {
csio->sense_data = io->scsiio.sense_data;
flags |= CAM_SEND_SENSE;
} else if (scsi_status == SCSI_STATUS_CHECK_COND) {
xpt_print(periph->path, "%s: check condition "
"with no sense\n", __func__);
}
} else {
struct ctlfe_lun_cmd_info *cmd_info;
/*
* Datamove call, we need to setup the S/G list.
*/
cmd_info = (struct ctlfe_lun_cmd_info *)
io->io_hdr.port_priv;
KASSERT(sizeof(*cmd_info) < CTL_PORT_PRIV_SIZE,
("%s: sizeof(struct ctlfe_lun_cmd_info) %zd < "
"CTL_PORT_PRIV_SIZE %d", __func__,
sizeof(*cmd_info), CTL_PORT_PRIV_SIZE));
io->io_hdr.flags &= ~CTL_FLAG_DMA_QUEUED;
/*
* Need to zero this, in case it has been used for
* a previous datamove for this particular I/O.
*/
bzero(cmd_info, sizeof(*cmd_info));
scsi_status = 0;
/*
* Set the direction, relative to the initiator.
*/
flags &= ~CAM_DIR_MASK;
if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) ==
CTL_FLAG_DATA_IN)
flags |= CAM_DIR_IN;
else
flags |= CAM_DIR_OUT;
csio->cdb_len = atio->cdb_len;
flags &= ~CAM_DATA_MASK;
if (io->scsiio.kern_sg_entries == 0) {
/* No S/G list */
data_ptr = io->scsiio.kern_data_ptr;
dxfer_len = io->scsiio.kern_data_len;
csio->sglist_cnt = 0;
if (io->io_hdr.flags & CTL_FLAG_BUS_ADDR)
flags |= CAM_DATA_PADDR;
else
flags |= CAM_DATA_VADDR;
} else if (io->scsiio.kern_sg_entries <=
(sizeof(cmd_info->cam_sglist)/
sizeof(cmd_info->cam_sglist[0]))) {
/*
* S/G list with physical or virtual pointers.
* Just populate the CAM S/G list with the
* pointers.
*/
int i;
struct ctl_sg_entry *ctl_sglist;
bus_dma_segment_t *cam_sglist;
ctl_sglist = (struct ctl_sg_entry *)
io->scsiio.kern_data_ptr;
cam_sglist = cmd_info->cam_sglist;
for (i = 0; i < io->scsiio.kern_sg_entries;i++){
cam_sglist[i].ds_addr =
(bus_addr_t)ctl_sglist[i].addr;
cam_sglist[i].ds_len =
ctl_sglist[i].len;
}
csio->sglist_cnt = io->scsiio.kern_sg_entries;
if (io->io_hdr.flags & CTL_FLAG_BUS_ADDR)
flags |= CAM_DATA_SG_PADDR;
else
flags |= CAM_DATA_SG;
data_ptr = (uint8_t *)cam_sglist;
dxfer_len = io->scsiio.kern_data_len;
} else {
/* S/G list with virtual pointers */
struct ctl_sg_entry *sglist;
int *ti;
/*
* If we have more S/G list pointers than
* will fit in the available storage in the
* cmd_info structure inside the ctl_io header,
* then we need to send down the pointers
* one element at a time.
*/
sglist = (struct ctl_sg_entry *)
io->scsiio.kern_data_ptr;
ti = &cmd_info->cur_transfer_index;
data_ptr = sglist[*ti].addr;
dxfer_len = sglist[*ti].len;
csio->sglist_cnt = 0;
if (io->io_hdr.flags & CTL_FLAG_BUS_ADDR)
flags |= CAM_DATA_PADDR;
else
flags |= CAM_DATA_VADDR;
cmd_info->flags |= CTLFE_CMD_PIECEWISE;
(*ti)++;
}
io->scsiio.ext_data_filled += dxfer_len;
if (io->scsiio.ext_data_filled >
io->scsiio.kern_total_len) {
xpt_print(periph->path, "%s: tag 0x%04x "
"fill len %u > total %u\n",
__func__, io->scsiio.tag_num,
io->scsiio.ext_data_filled,
io->scsiio.kern_total_len);
}
}
#ifdef CTLFEDEBUG
printf("%s: %s: tag %04x flags %x ptr %p len %u\n", __func__,
(flags & CAM_SEND_STATUS) ? "done" : "datamove",
atio->tag_id, flags, data_ptr, dxfer_len);
#endif
/*
* Valid combinations:
* - CAM_SEND_STATUS, CAM_DATA_SG = 0, dxfer_len = 0,
* sglist_cnt = 0
* - CAM_SEND_STATUS = 0, CAM_DATA_SG = 0, dxfer_len != 0,
* sglist_cnt = 0
* - CAM_SEND_STATUS = 0, CAM_DATA_SG, dxfer_len != 0,
* sglist_cnt != 0
*/
#ifdef CTLFEDEBUG
if (((flags & CAM_SEND_STATUS)
&& (((flags & CAM_DATA_SG) != 0)
|| (dxfer_len != 0)
|| (csio->sglist_cnt != 0)))
|| (((flags & CAM_SEND_STATUS) == 0)
&& (dxfer_len == 0))
|| ((flags & CAM_DATA_SG)
&& (csio->sglist_cnt == 0))
|| (((flags & CAM_DATA_SG) == 0)
&& (csio->sglist_cnt != 0))) {
printf("%s: tag %04x cdb %02x flags %#x dxfer_len "
"%d sg %u\n", __func__, atio->tag_id,
atio->cdb_io.cdb_bytes[0], flags, dxfer_len,
csio->sglist_cnt);
if (io != NULL) {
printf("%s: tag %04x io status %#x\n", __func__,
atio->tag_id, io->io_hdr.status);
} else {
printf("%s: tag %04x no associated io\n",
__func__, atio->tag_id);
}
}
#endif
cam_fill_ctio(csio,
/*retries*/ 2,
ctlfedone,
flags,
(flags & CAM_TAG_ACTION_VALID) ?
MSG_SIMPLE_Q_TAG : 0,
atio->tag_id,
atio->init_id,
scsi_status,
/*data_ptr*/ data_ptr,
/*dxfer_len*/ dxfer_len,
/*timeout*/ 5 * 1000);
start_ccb->ccb_h.flags |= CAM_UNLOCKED;
start_ccb->ccb_h.ccb_atio = atio;
if (((flags & CAM_SEND_STATUS) == 0)
&& (io != NULL))
io->io_hdr.flags |= CTL_FLAG_DMA_INPROG;
softc->ctios_sent++;
cam_periph_unlock(periph);
xpt_action(start_ccb);
cam_periph_lock(periph);
if ((atio->ccb_h.status & CAM_DEV_QFRZN) != 0) {
cam_release_devq(periph->path,
/*relsim_flags*/0,
/*reduction*/0,
/*timeout*/0,
/*getcount_only*/0);
atio->ccb_h.status &= ~CAM_DEV_QFRZN;
}
ccb_h = TAILQ_FIRST(&softc->work_queue);
}
/*
* If we still have work to do, ask for another CCB. Otherwise,
* deactivate our callout.
*/
if (ccb_h != NULL)
xpt_schedule(periph, /*priority*/ 1);
else
callout_stop(&softc->dma_callout);
}
static void
ctlfe_free_ccb(struct cam_periph *periph, union ccb *ccb)
{
struct ctlfe_lun_softc *softc;
softc = (struct ctlfe_lun_softc *)periph->softc;
switch (ccb->ccb_h.func_code) {
case XPT_ACCEPT_TARGET_IO:
softc->atios_returned++;
break;
case XPT_IMMEDIATE_NOTIFY:
case XPT_NOTIFY_ACKNOWLEDGE:
softc->inots_returned++;
break;
default:
break;
}
free(ccb, M_CTLFE);
KASSERT(softc->atios_returned <= softc->atios_sent, ("%s: "
"atios_returned %ju > atios_sent %ju", __func__,
softc->atios_returned, softc->atios_sent));
KASSERT(softc->inots_returned <= softc->inots_sent, ("%s: "
"inots_returned %ju > inots_sent %ju", __func__,
softc->inots_returned, softc->inots_sent));
/*
* If we have received all of our CCBs, we can release our
* reference on the peripheral driver. It will probably go away
* now.
*/
if ((softc->atios_returned == softc->atios_sent)
&& (softc->inots_returned == softc->inots_sent)) {
cam_periph_release_locked(periph);
}
}
static int
ctlfe_adjust_cdb(struct ccb_accept_tio *atio, uint32_t offset)
{
uint64_t lba;
uint32_t num_blocks, nbc;
uint8_t *cmdbyt = (atio->ccb_h.flags & CAM_CDB_POINTER)?
atio->cdb_io.cdb_ptr : atio->cdb_io.cdb_bytes;
nbc = offset >> 9; /* ASSUMING 512 BYTE BLOCKS */
switch (cmdbyt[0]) {
case READ_6:
case WRITE_6:
{
struct scsi_rw_6 *cdb = (struct scsi_rw_6 *)cmdbyt;
lba = scsi_3btoul(cdb->addr);
lba &= 0x1fffff;
num_blocks = cdb->length;
if (num_blocks == 0)
num_blocks = 256;
lba += nbc;
num_blocks -= nbc;
scsi_ulto3b(lba, cdb->addr);
cdb->length = num_blocks;
break;
}
case READ_10:
case WRITE_10:
{
struct scsi_rw_10 *cdb = (struct scsi_rw_10 *)cmdbyt;
lba = scsi_4btoul(cdb->addr);
num_blocks = scsi_2btoul(cdb->length);
lba += nbc;
num_blocks -= nbc;
scsi_ulto4b(lba, cdb->addr);
scsi_ulto2b(num_blocks, cdb->length);
break;
}
case READ_12:
case WRITE_12:
{
struct scsi_rw_12 *cdb = (struct scsi_rw_12 *)cmdbyt;
lba = scsi_4btoul(cdb->addr);
num_blocks = scsi_4btoul(cdb->length);
lba += nbc;
num_blocks -= nbc;
scsi_ulto4b(lba, cdb->addr);
scsi_ulto4b(num_blocks, cdb->length);
break;
}
case READ_16:
case WRITE_16:
{
struct scsi_rw_16 *cdb = (struct scsi_rw_16 *)cmdbyt;
lba = scsi_8btou64(cdb->addr);
num_blocks = scsi_4btoul(cdb->length);
lba += nbc;
num_blocks -= nbc;
scsi_u64to8b(lba, cdb->addr);
scsi_ulto4b(num_blocks, cdb->length);
break;
}
default:
return -1;
}
return (0);
}
static void
ctlfedone(struct cam_periph *periph, union ccb *done_ccb)
{
struct ctlfe_lun_softc *softc;
struct ctlfe_softc *bus_softc;
struct ccb_accept_tio *atio = NULL;
union ctl_io *io = NULL;
struct mtx *mtx;
KASSERT((done_ccb->ccb_h.flags & CAM_UNLOCKED) != 0,
("CCB in ctlfedone() without CAM_UNLOCKED flag"));
#ifdef CTLFE_DEBUG
printf("%s: entered, func_code = %#x, type = %#lx\n", __func__,
done_ccb->ccb_h.func_code, done_ccb->ccb_h.ccb_type);
#endif
softc = (struct ctlfe_lun_softc *)periph->softc;
bus_softc = softc->parent_softc;
mtx = cam_periph_mtx(periph);
mtx_lock(mtx);
/*
* If the peripheral is invalid, ATIOs and immediate notify CCBs
* need to be freed. Most of the ATIOs and INOTs that come back
* will be CCBs that are being returned from the SIM as a result of
* our disabling the LUN.
*
* Other CCB types are handled in their respective cases below.
*/
if (periph->flags & CAM_PERIPH_INVALID) {
switch (done_ccb->ccb_h.func_code) {
case XPT_ACCEPT_TARGET_IO:
case XPT_IMMEDIATE_NOTIFY:
case XPT_NOTIFY_ACKNOWLEDGE:
ctlfe_free_ccb(periph, done_ccb);
goto out;
default:
break;
}
}
switch (done_ccb->ccb_h.func_code) {
case XPT_ACCEPT_TARGET_IO: {
atio = &done_ccb->atio;
softc->atios_returned++;
resubmit:
/*
* Allocate a ctl_io, pass it to CTL, and wait for the
* datamove or done.
*/
io = ctl_alloc_io(bus_softc->fe.ctl_pool_ref);
if (io == NULL) {
atio->ccb_h.flags &= ~CAM_DIR_MASK;
atio->ccb_h.flags |= CAM_DIR_NONE;
printf("%s: ctl_alloc_io failed!\n", __func__);
/*
* XXX KDM need to set SCSI_STATUS_BUSY, but there
* is no field in the ATIO structure to do that,
* and we aren't able to allocate a ctl_io here.
* What to do?
*/
atio->sense_len = 0;
done_ccb->ccb_h.io_ptr = NULL;
TAILQ_INSERT_TAIL(&softc->work_queue, &atio->ccb_h,
periph_links.tqe);
xpt_schedule(periph, /*priority*/ 1);
break;
}
mtx_unlock(mtx);
ctl_zero_io(io);
/* Save pointers on both sides */
io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = done_ccb;
done_ccb->ccb_h.io_ptr = io;
/*
* Only SCSI I/O comes down this path, resets, etc. come
* down the immediate notify path below.
*/
io->io_hdr.io_type = CTL_IO_SCSI;
io->io_hdr.nexus.initid.id = atio->init_id;
io->io_hdr.nexus.targ_port = bus_softc->fe.targ_port;
io->io_hdr.nexus.targ_target.id = atio->ccb_h.target_id;
io->io_hdr.nexus.targ_lun = atio->ccb_h.target_lun;
io->scsiio.tag_num = atio->tag_id;
switch (atio->tag_action) {
case CAM_TAG_ACTION_NONE:
io->scsiio.tag_type = CTL_TAG_UNTAGGED;
break;
case MSG_SIMPLE_TASK:
io->scsiio.tag_type = CTL_TAG_SIMPLE;
break;
case MSG_HEAD_OF_QUEUE_TASK:
io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
break;
case MSG_ORDERED_TASK:
io->scsiio.tag_type = CTL_TAG_ORDERED;
break;
case MSG_ACA_TASK:
io->scsiio.tag_type = CTL_TAG_ACA;
break;
default:
io->scsiio.tag_type = CTL_TAG_UNTAGGED;
printf("%s: unhandled tag type %#x!!\n", __func__,
atio->tag_action);
break;
}
if (atio->cdb_len > sizeof(io->scsiio.cdb)) {
printf("%s: WARNING: CDB len %d > ctl_io space %zd\n",
__func__, atio->cdb_len, sizeof(io->scsiio.cdb));
}
io->scsiio.cdb_len = min(atio->cdb_len, sizeof(io->scsiio.cdb));
bcopy(atio->cdb_io.cdb_bytes, io->scsiio.cdb,
io->scsiio.cdb_len);
#ifdef CTLFEDEBUG
printf("%s: %ju:%d:%ju:%d: tag %04x CDB %02x\n", __func__,
(uintmax_t)io->io_hdr.nexus.initid.id,
io->io_hdr.nexus.targ_port,
(uintmax_t)io->io_hdr.nexus.targ_target.id,
io->io_hdr.nexus.targ_lun,
io->scsiio.tag_num, io->scsiio.cdb[0]);
#endif
ctl_queue(io);
return;
}
case XPT_CONT_TARGET_IO: {
int srr = 0;
uint32_t srr_off = 0;
atio = (struct ccb_accept_tio *)done_ccb->ccb_h.ccb_atio;
io = (union ctl_io *)atio->ccb_h.io_ptr;
softc->ctios_returned++;
#ifdef CTLFEDEBUG
printf("%s: got XPT_CONT_TARGET_IO tag %#x flags %#x\n",
__func__, atio->tag_id, done_ccb->ccb_h.flags);
#endif
/*
* Handle SRR case were the data pointer is pushed back hack
*/
if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_MESSAGE_RECV
&& done_ccb->csio.msg_ptr != NULL
&& done_ccb->csio.msg_ptr[0] == MSG_EXTENDED
&& done_ccb->csio.msg_ptr[1] == 5
&& done_ccb->csio.msg_ptr[2] == 0) {
srr = 1;
srr_off =
(done_ccb->csio.msg_ptr[3] << 24)
| (done_ccb->csio.msg_ptr[4] << 16)
| (done_ccb->csio.msg_ptr[5] << 8)
| (done_ccb->csio.msg_ptr[6]);
}
if (srr && (done_ccb->ccb_h.flags & CAM_SEND_STATUS)) {
/*
* If status was being sent, the back end data is now
* history. Hack it up and resubmit a new command with
* the CDB adjusted. If the SIM does the right thing,
* all of the resid math should work.
*/
softc->ccbs_freed++;
xpt_release_ccb(done_ccb);
ctl_free_io(io);
if (ctlfe_adjust_cdb(atio, srr_off) == 0) {
done_ccb = (union ccb *)atio;
goto resubmit;
}
/*
* Fall through to doom....
*/
} else if (srr) {
/*
* If we have an srr and we're still sending data, we
* should be able to adjust offsets and cycle again.
*/
io->scsiio.kern_rel_offset =
io->scsiio.ext_data_filled = srr_off;
io->scsiio.ext_data_len = io->scsiio.kern_total_len -
io->scsiio.kern_rel_offset;
softc->ccbs_freed++;
io->scsiio.io_hdr.status = CTL_STATUS_NONE;
xpt_release_ccb(done_ccb);
TAILQ_INSERT_HEAD(&softc->work_queue, &atio->ccb_h,
periph_links.tqe);
xpt_schedule(periph, /*priority*/ 1);
break;
}
/*
* If we were sending status back to the initiator, free up
* resources. If we were doing a datamove, call the
* datamove done routine.
*/
if (done_ccb->ccb_h.flags & CAM_SEND_STATUS) {
softc->ccbs_freed++;
xpt_release_ccb(done_ccb);
ctl_free_io(io);
/*
* For a wildcard attachment, commands can come in
* with a specific target/lun. Reset the target
* and LUN fields back to the wildcard values before
* we send them back down to the SIM. The SIM has
* a wildcard LUN enabled, not whatever target/lun
* these happened to be.
*/
if (softc->flags & CTLFE_LUN_WILDCARD) {
atio->ccb_h.target_id = CAM_TARGET_WILDCARD;
atio->ccb_h.target_lun = CAM_LUN_WILDCARD;
}
if (periph->flags & CAM_PERIPH_INVALID) {
ctlfe_free_ccb(periph, (union ccb *)atio);
} else {
softc->atios_sent++;
mtx_unlock(mtx);
xpt_action((union ccb *)atio);
return;
}
} else {
struct ctlfe_lun_cmd_info *cmd_info;
struct ccb_scsiio *csio;
csio = &done_ccb->csio;
cmd_info = (struct ctlfe_lun_cmd_info *)
io->io_hdr.port_priv;
io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG;
io->scsiio.ext_data_len += csio->dxfer_len;
if (io->scsiio.ext_data_len >
io->scsiio.kern_total_len) {
xpt_print(periph->path, "%s: tag 0x%04x "
"done len %u > total %u sent %u\n",
__func__, io->scsiio.tag_num,
io->scsiio.ext_data_len,
io->scsiio.kern_total_len,
io->scsiio.ext_data_filled);
}
/*
* Translate CAM status to CTL status. Success
* does not change the overall, ctl_io status. In
* that case we just set port_status to 0. If we
* have a failure, though, set a data phase error
* for the overall ctl_io.
*/
switch (done_ccb->ccb_h.status & CAM_STATUS_MASK) {
case CAM_REQ_CMP:
io->io_hdr.port_status = 0;
break;
default:
/*
* XXX KDM we probably need to figure out a
* standard set of errors that the SIM
* drivers should return in the event of a
* data transfer failure. A data phase
* error will at least point the user to a
* data transfer error of some sort.
* Hopefully the SIM printed out some
* additional information to give the user
* a clue what happened.
*/
io->io_hdr.port_status = 0xbad1;
ctl_set_data_phase_error(&io->scsiio);
/*
* XXX KDM figure out residual.
*/
break;
}
/*
* If we had to break this S/G list into multiple
* pieces, figure out where we are in the list, and
* continue sending pieces if necessary.
*/
if ((cmd_info->flags & CTLFE_CMD_PIECEWISE)
&& (io->io_hdr.port_status == 0)
&& (cmd_info->cur_transfer_index <
io->scsiio.kern_sg_entries)) {
struct ctl_sg_entry *sglist;
ccb_flags flags;
uint8_t scsi_status;
uint8_t *data_ptr;
uint32_t dxfer_len;
int *ti;
sglist = (struct ctl_sg_entry *)
io->scsiio.kern_data_ptr;
ti = &cmd_info->cur_transfer_index;
flags = atio->ccb_h.flags &
(CAM_DIS_DISCONNECT|
CAM_TAG_ACTION_VALID|
CAM_DIR_MASK);
/*
* Set the direction, relative to the initiator.
*/
flags &= ~CAM_DIR_MASK;
if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) ==
CTL_FLAG_DATA_IN)
flags |= CAM_DIR_IN;
else
flags |= CAM_DIR_OUT;
data_ptr = sglist[*ti].addr;
dxfer_len = sglist[*ti].len;
(*ti)++;
scsi_status = 0;
if (((flags & CAM_SEND_STATUS) == 0)
&& (dxfer_len == 0)) {
printf("%s: tag %04x no status or "
"len cdb = %02x\n", __func__,
atio->tag_id,
atio->cdb_io.cdb_bytes[0]);
printf("%s: tag %04x io status %#x\n",
__func__, atio->tag_id,
io->io_hdr.status);
}
cam_fill_ctio(csio,
/*retries*/ 2,
ctlfedone,
flags,
(flags & CAM_TAG_ACTION_VALID) ?
MSG_SIMPLE_Q_TAG : 0,
atio->tag_id,
atio->init_id,
scsi_status,
/*data_ptr*/ data_ptr,
/*dxfer_len*/ dxfer_len,
/*timeout*/ 5 * 1000);
csio->ccb_h.flags |= CAM_UNLOCKED;
csio->resid = 0;
csio->ccb_h.ccb_atio = atio;
io->io_hdr.flags |= CTL_FLAG_DMA_INPROG;
softc->ctios_sent++;
mtx_unlock(mtx);
xpt_action((union ccb *)csio);
} else {
/*
* Release the CTIO. The ATIO will be sent back
* down to the SIM once we send status.
*/
softc->ccbs_freed++;
xpt_release_ccb(done_ccb);
mtx_unlock(mtx);
/* Call the backend move done callback */
io->scsiio.be_move_done(io);
}
return;
}
break;
}
case XPT_IMMEDIATE_NOTIFY: {
union ctl_io *io;
struct ccb_immediate_notify *inot;
cam_status status;
int frozen;
inot = &done_ccb->cin1;
softc->inots_returned++;
frozen = (done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0;
printf("%s: got XPT_IMMEDIATE_NOTIFY status %#x tag %#x "
"seq %#x\n", __func__, inot->ccb_h.status,
inot->tag_id, inot->seq_id);
io = ctl_alloc_io(bus_softc->fe.ctl_pool_ref);
if (io != NULL) {
int send_ctl_io;
send_ctl_io = 1;
ctl_zero_io(io);
io->io_hdr.io_type = CTL_IO_TASK;
io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr =done_ccb;
inot->ccb_h.io_ptr = io;
io->io_hdr.nexus.initid.id = inot->initiator_id;
io->io_hdr.nexus.targ_port = bus_softc->fe.targ_port;
io->io_hdr.nexus.targ_target.id = inot->ccb_h.target_id;
io->io_hdr.nexus.targ_lun = inot->ccb_h.target_lun;
/* XXX KDM should this be the tag_id? */
io->taskio.tag_num = inot->seq_id;
status = inot->ccb_h.status & CAM_STATUS_MASK;
switch (status) {
case CAM_SCSI_BUS_RESET:
io->taskio.task_action = CTL_TASK_BUS_RESET;
break;
case CAM_BDR_SENT:
io->taskio.task_action = CTL_TASK_TARGET_RESET;
break;
case CAM_MESSAGE_RECV:
switch (inot->arg) {
case MSG_ABORT_TASK_SET:
/*
* XXX KDM this isn't currently
* supported by CTL. It ends up
* being a no-op.
*/
io->taskio.task_action =
CTL_TASK_ABORT_TASK_SET;
break;
case MSG_TARGET_RESET:
io->taskio.task_action =
CTL_TASK_TARGET_RESET;
break;
case MSG_ABORT_TASK:
io->taskio.task_action =
CTL_TASK_ABORT_TASK;
break;
case MSG_LOGICAL_UNIT_RESET:
io->taskio.task_action =
CTL_TASK_LUN_RESET;
break;
case MSG_CLEAR_TASK_SET:
/*
* XXX KDM this isn't currently
* supported by CTL. It ends up
* being a no-op.
*/
io->taskio.task_action =
CTL_TASK_CLEAR_TASK_SET;
break;
case MSG_CLEAR_ACA:
io->taskio.task_action =
CTL_TASK_CLEAR_ACA;
break;
case MSG_NOOP:
send_ctl_io = 0;
break;
default:
xpt_print(periph->path, "%s: "
"unsupported message 0x%x\n",
__func__, inot->arg);
send_ctl_io = 0;
break;
}
break;
case CAM_REQ_ABORTED:
/*
* This request was sent back by the driver.
* XXX KDM what do we do here?
*/
send_ctl_io = 0;
break;
case CAM_REQ_INVALID:
case CAM_PROVIDE_FAIL:
default:
/*
* We should only get here if we're talking
* to a talking to a SIM that is target
* capable but supports the old API. In
* that case, we need to just free the CCB.
* If we actually send a notify acknowledge,
* it will send that back with an error as
* well.
*/
if ((status != CAM_REQ_INVALID)
&& (status != CAM_PROVIDE_FAIL))
xpt_print(periph->path, "%s: "
"unsupported CAM status "
"0x%x\n", __func__, status);
ctl_free_io(io);
ctlfe_free_ccb(periph, done_ccb);
goto out;
}
if (send_ctl_io != 0) {
ctl_queue(io);
} else {
ctl_free_io(io);
done_ccb->ccb_h.status = CAM_REQ_INPROG;
done_ccb->ccb_h.func_code =
XPT_NOTIFY_ACKNOWLEDGE;
xpt_action(done_ccb);
}
} else {
xpt_print(periph->path, "%s: could not allocate "
"ctl_io for immediate notify!\n", __func__);
/* requeue this to the adapter */
done_ccb->ccb_h.status = CAM_REQ_INPROG;
done_ccb->ccb_h.func_code = XPT_NOTIFY_ACKNOWLEDGE;
xpt_action(done_ccb);
}
if (frozen != 0) {
cam_release_devq(periph->path,
/*relsim_flags*/ 0,
/*opening reduction*/ 0,
/*timeout*/ 0,
/*getcount_only*/ 0);
}
break;
}
case XPT_NOTIFY_ACKNOWLEDGE:
/*
* Queue this back down to the SIM as an immediate notify.
*/
done_ccb->ccb_h.func_code = XPT_IMMEDIATE_NOTIFY;
xpt_action(done_ccb);
softc->inots_sent++;
break;
case XPT_SET_SIM_KNOB:
case XPT_GET_SIM_KNOB:
break;
default:
panic("%s: unexpected CCB type %#x", __func__,
done_ccb->ccb_h.func_code);
break;
}
out:
mtx_unlock(mtx);
}
static void
ctlfe_onoffline(void *arg, int online)
{
struct ctlfe_softc *bus_softc;
union ccb *ccb;
cam_status status;
struct cam_path *path;
int set_wwnn;
bus_softc = (struct ctlfe_softc *)arg;
set_wwnn = 0;
status = xpt_create_path(&path, /*periph*/ NULL, bus_softc->path_id,
CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
if (status != CAM_REQ_CMP) {
printf("%s: unable to create path!\n", __func__);
return;
}
ccb = (union ccb *)malloc(sizeof(*ccb), M_TEMP, M_NOWAIT | M_ZERO);
if (ccb == NULL) {
printf("%s: unable to malloc CCB!\n", __func__);
xpt_free_path(path);
return;
}
xpt_setup_ccb(&ccb->ccb_h, path, CAM_PRIORITY_NONE);
/*
* Copan WWN format:
*
* Bits 63-60: 0x5 NAA, IEEE registered name
* Bits 59-36: 0x000ED5 IEEE Company name assigned to Copan
* Bits 35-12: Copan SSN (Sequential Serial Number)
* Bits 11-8: Type of port:
* 1 == N-Port
* 2 == F-Port
* 3 == NL-Port
* Bits 7-0: 0 == Node Name, >0 == Port Number
*/
if (online != 0) {
ccb->ccb_h.func_code = XPT_GET_SIM_KNOB;
xpt_action(ccb);
if ((ccb->knob.xport_specific.valid & KNOB_VALID_ADDRESS) != 0){
#ifdef RANDOM_WWNN
uint64_t random_bits;
#endif
printf("%s: %s current WWNN %#jx\n", __func__,
bus_softc->port_name,
ccb->knob.xport_specific.fc.wwnn);
printf("%s: %s current WWPN %#jx\n", __func__,
bus_softc->port_name,
ccb->knob.xport_specific.fc.wwpn);
#ifdef RANDOM_WWNN
arc4rand(&random_bits, sizeof(random_bits), 0);
#endif
/*
* XXX KDM this is a bit of a kludge for now. We
* take the current WWNN/WWPN from the card, and
* replace the company identifier and the NL-Port
* indicator and the port number (for the WWPN).
* This should be replaced later with ddb_GetWWNN,
* or possibly a more centralized scheme. (It
* would be nice to have the WWNN/WWPN for each
* port stored in the ctl_frontend structure.)
*/
#ifdef RANDOM_WWNN
ccb->knob.xport_specific.fc.wwnn =
(random_bits &
0x0000000fffffff00ULL) |
/* Company ID */ 0x5000ED5000000000ULL |
/* NL-Port */ 0x0300;
ccb->knob.xport_specific.fc.wwpn =
(random_bits &
0x0000000fffffff00ULL) |
/* Company ID */ 0x5000ED5000000000ULL |
/* NL-Port */ 0x3000 |
/* Port Num */ (bus_softc->fe.targ_port & 0xff);
/*
* This is a bit of an API break/reversal, but if
* we're doing the random WWNN that's a little
* different anyway. So record what we're actually
* using with the frontend code so it's reported
* accurately.
*/
bus_softc->fe.wwnn =
ccb->knob.xport_specific.fc.wwnn;
bus_softc->fe.wwpn =
ccb->knob.xport_specific.fc.wwpn;
set_wwnn = 1;
#else /* RANDOM_WWNN */
/*
* If the user has specified a WWNN/WWPN, send them
* down to the SIM. Otherwise, record what the SIM
* has reported.
*/
if ((bus_softc->fe.wwnn != 0)
&& (bus_softc->fe.wwpn != 0)) {
ccb->knob.xport_specific.fc.wwnn =
bus_softc->fe.wwnn;
ccb->knob.xport_specific.fc.wwpn =
bus_softc->fe.wwpn;
set_wwnn = 1;
} else {
bus_softc->fe.wwnn =
ccb->knob.xport_specific.fc.wwnn;
bus_softc->fe.wwpn =
ccb->knob.xport_specific.fc.wwpn;
}
#endif /* RANDOM_WWNN */
if (set_wwnn != 0) {
printf("%s: %s new WWNN %#jx\n", __func__,
bus_softc->port_name,
ccb->knob.xport_specific.fc.wwnn);
printf("%s: %s new WWPN %#jx\n", __func__,
bus_softc->port_name,
ccb->knob.xport_specific.fc.wwpn);
}
} else {
printf("%s: %s has no valid WWNN/WWPN\n", __func__,
bus_softc->port_name);
}
}
ccb->ccb_h.func_code = XPT_SET_SIM_KNOB;
ccb->knob.xport_specific.valid = KNOB_VALID_ROLE;
if (set_wwnn != 0)
ccb->knob.xport_specific.valid |= KNOB_VALID_ADDRESS;
if (online != 0)
ccb->knob.xport_specific.fc.role = KNOB_ROLE_TARGET;
else
ccb->knob.xport_specific.fc.role = KNOB_ROLE_NONE;
xpt_action(ccb);
if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
printf("%s: SIM %s (path id %d) target %s failed with "
"status %#x\n",
__func__, bus_softc->port_name, bus_softc->path_id,
(online != 0) ? "enable" : "disable",
ccb->ccb_h.status);
} else {
printf("%s: SIM %s (path id %d) target %s succeeded\n",
__func__, bus_softc->port_name, bus_softc->path_id,
(online != 0) ? "enable" : "disable");
}
xpt_free_path(path);
free(ccb, M_TEMP);
return;
}
static void
ctlfe_online(void *arg)
{
struct ctlfe_softc *bus_softc;
struct cam_path *path;
cam_status status;
struct ctlfe_lun_softc *lun_softc;
bus_softc = (struct ctlfe_softc *)arg;
/*
* Create the wildcard LUN before bringing the port online.
*/
status = xpt_create_path(&path, /*periph*/ NULL,
bus_softc->path_id, CAM_TARGET_WILDCARD,
CAM_LUN_WILDCARD);
if (status != CAM_REQ_CMP) {
printf("%s: unable to create path for wildcard periph\n",
__func__);
return;
}
lun_softc = malloc(sizeof(*lun_softc), M_CTLFE,
M_NOWAIT | M_ZERO);
if (lun_softc == NULL) {
xpt_print(path, "%s: unable to allocate softc for "
"wildcard periph\n", __func__);
xpt_free_path(path);
return;
}
xpt_path_lock(path);
lun_softc->parent_softc = bus_softc;
lun_softc->flags |= CTLFE_LUN_WILDCARD;
mtx_lock(&bus_softc->lun_softc_mtx);
STAILQ_INSERT_TAIL(&bus_softc->lun_softc_list, lun_softc, links);
mtx_unlock(&bus_softc->lun_softc_mtx);
status = cam_periph_alloc(ctlferegister,
ctlfeoninvalidate,
ctlfecleanup,
ctlfestart,
"ctl",
CAM_PERIPH_BIO,
path,
ctlfeasync,
0,
lun_softc);
if ((status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
const struct cam_status_entry *entry;
entry = cam_fetch_status_entry(status);
printf("%s: CAM error %s (%#x) returned from "
"cam_periph_alloc()\n", __func__, (entry != NULL) ?
entry->status_text : "Unknown", status);
}
ctlfe_onoffline(arg, /*online*/ 1);
xpt_path_unlock(path);
xpt_free_path(path);
}
static void
ctlfe_offline(void *arg)
{
struct ctlfe_softc *bus_softc;
struct cam_path *path;
cam_status status;
struct cam_periph *periph;
bus_softc = (struct ctlfe_softc *)arg;
/*
* Disable the wildcard LUN for this port now that we have taken
* the port offline.
*/
status = xpt_create_path(&path, /*periph*/ NULL,
bus_softc->path_id, CAM_TARGET_WILDCARD,
CAM_LUN_WILDCARD);
if (status != CAM_REQ_CMP) {
printf("%s: unable to create path for wildcard periph\n",
__func__);
return;
}
xpt_path_lock(path);
ctlfe_onoffline(arg, /*online*/ 0);
if ((periph = cam_periph_find(path, "ctl")) != NULL)
cam_periph_invalidate(periph);
xpt_path_unlock(path);
xpt_free_path(path);
}
static int
ctlfe_targ_enable(void *arg, struct ctl_id targ_id)
{
return (0);
}
static int
ctlfe_targ_disable(void *arg, struct ctl_id targ_id)
{
return (0);
}
/*
* This will get called to enable a LUN on every bus that is attached to
* CTL. So we only need to create a path/periph for this particular bus.
*/
static int
ctlfe_lun_enable(void *arg, struct ctl_id targ_id, int lun_id)
{
struct ctlfe_softc *bus_softc;
struct ctlfe_lun_softc *softc;
struct cam_path *path;
struct cam_periph *periph;
cam_status status;
bus_softc = (struct ctlfe_softc *)arg;
status = xpt_create_path(&path, /*periph*/ NULL,
bus_softc->path_id,
targ_id.id, lun_id);
/* XXX KDM need some way to return status to CTL here? */
if (status != CAM_REQ_CMP) {
printf("%s: could not create path, status %#x\n", __func__,
status);
return (1);
}
softc = malloc(sizeof(*softc), M_CTLFE, M_WAITOK | M_ZERO);
xpt_path_lock(path);
periph = cam_periph_find(path, "ctl");
if (periph != NULL) {
/* We've already got a periph, no need to alloc a new one. */
xpt_path_unlock(path);
xpt_free_path(path);
free(softc, M_CTLFE);
return (0);
}
softc->parent_softc = bus_softc;
mtx_lock(&bus_softc->lun_softc_mtx);
STAILQ_INSERT_TAIL(&bus_softc->lun_softc_list, softc, links);
mtx_unlock(&bus_softc->lun_softc_mtx);
status = cam_periph_alloc(ctlferegister,
ctlfeoninvalidate,
ctlfecleanup,
ctlfestart,
"ctl",
CAM_PERIPH_BIO,
path,
ctlfeasync,
0,
softc);
xpt_path_unlock(path);
xpt_free_path(path);
return (0);
}
/*
* This will get called when the user removes a LUN to disable that LUN
* on every bus that is attached to CTL.
*/
static int
ctlfe_lun_disable(void *arg, struct ctl_id targ_id, int lun_id)
{
struct ctlfe_softc *softc;
struct ctlfe_lun_softc *lun_softc;
softc = (struct ctlfe_softc *)arg;
mtx_lock(&softc->lun_softc_mtx);
STAILQ_FOREACH(lun_softc, &softc->lun_softc_list, links) {
struct cam_path *path;
path = lun_softc->periph->path;
if ((xpt_path_target_id(path) == targ_id.id)
&& (xpt_path_lun_id(path) == lun_id)) {
break;
}
}
if (lun_softc == NULL) {
mtx_unlock(&softc->lun_softc_mtx);
printf("%s: can't find target %d lun %d\n", __func__,
targ_id.id, lun_id);
return (1);
}
cam_periph_acquire(lun_softc->periph);
mtx_unlock(&softc->lun_softc_mtx);
cam_periph_lock(lun_softc->periph);
cam_periph_invalidate(lun_softc->periph);
cam_periph_unlock(lun_softc->periph);
cam_periph_release(lun_softc->periph);
return (0);
}
static void
ctlfe_dump_sim(struct cam_sim *sim)
{
printf("%s%d: max tagged openings: %d, max dev openings: %d\n",
sim->sim_name, sim->unit_number,
sim->max_tagged_dev_openings, sim->max_dev_openings);
printf("\n");
}
/*
* Assumes that the SIM lock is held.
*/
static void
ctlfe_dump_queue(struct ctlfe_lun_softc *softc)
{
struct ccb_hdr *hdr;
struct cam_periph *periph;
int num_items;
periph = softc->periph;
num_items = 0;
TAILQ_FOREACH(hdr, &softc->work_queue, periph_links.tqe) {
union ctl_io *io;
io = hdr->io_ptr;
num_items++;
/*
* This can happen when we get an ATIO but can't allocate
* a ctl_io. See the XPT_ACCEPT_TARGET_IO case in ctlfedone().
*/
if (io == NULL) {
struct ccb_scsiio *csio;
csio = (struct ccb_scsiio *)hdr;
xpt_print(periph->path, "CCB %#x ctl_io allocation "
"failed\n", csio->tag_id);
continue;
}
/*
* Only regular SCSI I/O is put on the work
* queue, so we can print sense here. There may be no
* sense if it's no the queue for a DMA, but this serves to
* print out the CCB as well.
*
* XXX KDM switch this over to scsi_sense_print() when
* CTL is merged in with CAM.
*/
ctl_io_error_print(io, NULL);
/*
* We're sending status back to the
* initiator, so we're on the queue waiting
* for a CTIO to do that.
*/
if ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE)
continue;
/*
* Otherwise, we're on the queue waiting to
* do a data transfer.
*/
xpt_print(periph->path, "Total %u, Current %u, Resid %u\n",
io->scsiio.kern_total_len, io->scsiio.kern_data_len,
io->scsiio.kern_data_resid);
}
xpt_print(periph->path, "%d requests total waiting for CCBs\n",
num_items);
xpt_print(periph->path, "%ju CCBs outstanding (%ju allocated, %ju "
"freed)\n", (uintmax_t)(softc->ccbs_alloced -
softc->ccbs_freed), (uintmax_t)softc->ccbs_alloced,
(uintmax_t)softc->ccbs_freed);
xpt_print(periph->path, "%ju CTIOs outstanding (%ju sent, %ju "
"returned\n", (uintmax_t)(softc->ctios_sent -
softc->ctios_returned), softc->ctios_sent,
softc->ctios_returned);
}
/*
* This function is called when we fail to get a CCB for a DMA or status return
* to the initiator within the specified time period.
*
* The callout code should insure that we hold the sim mutex here.
*/
static void
ctlfe_dma_timeout(void *arg)
{
struct ctlfe_lun_softc *softc;
struct cam_periph *periph;
struct cam_sim *sim;
int num_queued;
softc = (struct ctlfe_lun_softc *)arg;
periph = softc->periph;
sim = xpt_path_sim(periph->path);
num_queued = 0;
/*
* Nothing to do...
*/
if (TAILQ_FIRST(&softc->work_queue) == NULL) {
xpt_print(periph->path, "TIMEOUT triggered after %d "
"seconds, but nothing on work queue??\n",
CTLFE_DMA_TIMEOUT);
return;
}
xpt_print(periph->path, "TIMEOUT (%d seconds) waiting for DMA to "
"start\n", CTLFE_DMA_TIMEOUT);
ctlfe_dump_queue(softc);
ctlfe_dump_sim(sim);
xpt_print(periph->path, "calling xpt_schedule() to attempt to "
"unstick our queue\n");
xpt_schedule(periph, /*priority*/ 1);
xpt_print(periph->path, "xpt_schedule() call complete\n");
}
/*
* Datamove/done routine called by CTL. Put ourselves on the queue to
* receive a CCB from CAM so we can queue the continue I/O request down
* to the adapter.
*/
static void
ctlfe_datamove_done(union ctl_io *io)
{
union ccb *ccb;
struct cam_periph *periph;
struct ctlfe_lun_softc *softc;
ccb = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
periph = xpt_path_periph(ccb->ccb_h.path);
cam_periph_lock(periph);
softc = (struct ctlfe_lun_softc *)periph->softc;
if (io->io_hdr.io_type == CTL_IO_TASK) {
/*
* Task management commands don't require any further
* communication back to the adapter. Requeue the CCB
* to the adapter, and free the CTL I/O.
*/
xpt_print(ccb->ccb_h.path, "%s: returning task I/O "
"tag %#x seq %#x\n", __func__,
ccb->cin1.tag_id, ccb->cin1.seq_id);
/*
* Send the notify acknowledge down to the SIM, to let it
* know we processed the task management command.
*/
ccb->ccb_h.status = CAM_REQ_INPROG;
ccb->ccb_h.func_code = XPT_NOTIFY_ACKNOWLEDGE;
xpt_action(ccb);
ctl_free_io(io);
} else {
if ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE)
io->io_hdr.flags |= CTL_FLAG_STATUS_QUEUED;
else
io->io_hdr.flags |= CTL_FLAG_DMA_QUEUED;
TAILQ_INSERT_TAIL(&softc->work_queue, &ccb->ccb_h,
periph_links.tqe);
/*
* Reset the timeout for our latest active DMA.
*/
callout_reset(&softc->dma_callout,
CTLFE_DMA_TIMEOUT * hz,
ctlfe_dma_timeout, softc);
/*
* Ask for the CAM transport layer to send us a CCB to do
* the DMA or send status, unless ctlfe_dma_enabled is set
* to 0.
*/
if (ctlfe_dma_enabled != 0)
xpt_schedule(periph, /*priority*/ 1);
}
cam_periph_unlock(periph);
}
static void
ctlfe_dump(void)
{
struct ctlfe_softc *bus_softc;
STAILQ_FOREACH(bus_softc, &ctlfe_softc_list, links) {
struct ctlfe_lun_softc *lun_softc;
ctlfe_dump_sim(bus_softc->sim);
STAILQ_FOREACH(lun_softc, &bus_softc->lun_softc_list, links) {
ctlfe_dump_queue(lun_softc);
}
}
}
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