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freebsd-dev/sys/cam/ctl/scsi_ctl.c
Kenneth D. Merry beedaee94a Add a loader tunable, kern.cam.ctl.disable, that will disable 
loading CTL.  This may be useful in very low memory installations.

MFC after:	3 days
2012-06-28 19:39:30 +00:00

2089 lines
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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_WAITING = 0x01
} ctlfe_ccb_types;
struct ctlfe_softc {
struct ctl_frontend fe;
path_id_t path_id;
struct cam_sim *sim;
char port_name[DEV_IDLEN];
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
};
PERIPHDRIVER_DECLARE(ctl, ctlfe_driver);
extern struct ctl_softc *control_softc;
extern int ctl_disable;
int
ctlfeinitialize(void)
{
cam_status status;
/* Don't initialize if we're disabled */
if (ctl_disable != 0)
return (0);
STAILQ_INIT(&ctlfe_softc_list);
mtx_init(&ctlfe_list_mtx, ctlfe_mtx_desc, NULL, MTX_DEF);
xpt_lock_buses();
periphdriver_register(&ctlfe_driver);
xpt_unlock_buses();
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);
}
return (0);
}
void
ctlfeshutdown(void)
{
return;
}
void
ctlfeinit(void)
{
cam_status status;
/* Don't initialize if we're disabled */
if (ctl_disable != 0)
return;
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 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 ctlfe_lun_softc *lun_softc;
struct cam_path *path;
struct ccb_pathinq *cpi;
cam_status status;
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;
struct cam_sim *sim;
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, cpi->ccb_h.path,
/*priority*/ 1);
sim = xpt_path_sim(cpi->ccb_h.path);
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;
/* We should hold the SIM lock here */
mtx_assert(sim->mtx, MA_OWNED);
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(cpi->ccb_h.path);
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);
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);
}
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__);
break;
}
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);
break;
}
lun_softc->parent_softc = bus_softc;
lun_softc->flags |= CTLFE_LUN_WILDCARD;
status = cam_periph_alloc(ctlferegister,
ctlfeoninvalidate,
ctlfecleanup,
ctlfestart,
"ctl",
CAM_PERIPH_BIO,
path,
ctlfeasync,
0,
lun_softc);
xpt_free_path(path);
break;
}
case AC_PATH_DEREGISTERED:
/* ctl_frontend_deregister() */
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;
struct cam_sim *sim;
union ccb en_lun_ccb;
cam_status status;
int i;
softc = (struct ctlfe_lun_softc *)arg;
bus_softc = softc->parent_softc;
sim = xpt_path_sim(periph->path);
TAILQ_INIT(&softc->work_queue);
softc->periph = periph;
callout_init_mtx(&softc->dma_callout, sim->mtx, /*flags*/ 0);
periph->softc = softc;
xpt_setup_ccb(&en_lun_ccb.ccb_h, periph->path, /*priority*/ 1);
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;
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;
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_lun_softc *softc;
softc = (struct ctlfe_lun_softc *)periph->softc;
xpt_setup_ccb(&en_lun_ccb.ccb_h, periph->path, /*priority*/ 1);
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);
}
static void
ctlfecleanup(struct cam_periph *periph)
{
struct ctlfe_lun_softc *softc;
struct ctlfe_softc *bus_softc;
xpt_print(periph->path, "%s: Called\n", __func__);
softc = (struct ctlfe_lun_softc *)periph->softc;
bus_softc = softc->parent_softc;
STAILQ_REMOVE(&bus_softc->lun_softc_list, softc, ctlfe_lun_softc,links);
/*
* XXX KDM is there anything else that needs to be done here?
*/
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++;
ccb_h = TAILQ_FIRST(&softc->work_queue);
if (periph->immediate_priority <= periph->pinfo.priority) {
panic("shouldn't get to the CCB waiting case!");
start_ccb->ccb_h.ccb_type = CTLFE_CCB_WAITING;
SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
periph_links.sle);
periph->immediate_priority = CAM_PRIORITY_NONE;
wakeup(&periph->ccb_list);
} else 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;
start_ccb->ccb_h.cbfcnp = ctlfedone;
/* 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.
* If we pass in a S/G list, the isp(4) driver at
* least expects physical/bus addresses.
*/
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;
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_PHYS;
} 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;
flags |= CAM_SCATTER_VALID;
if (io->io_hdr.flags & CTL_FLAG_BUS_ADDR)
flags |= CAM_SG_LIST_PHYS;
else
flags &= ~CAM_SG_LIST_PHYS;
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;
/*
* XXX KDM this is a temporary hack. The
* isp(4) driver can't deal with S/G lists
* with virtual pointers, so we need to
* go through and send down one virtual
* pointer 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;
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, SCATTER_VALID = 0, dxfer_len = 0,
* sglist_cnt = 0
* - CAM_SEND_STATUS = 0, SCATTER_VALID = 0, dxfer_len != 0,
* sglist_cnt = 0
* - CAM_SEND_STATUS = 0, SCATTER_VALID, dxfer_len != 0,
* sglist_cnt != 0
*/
#ifdef CTLFEDEBUG
if (((flags & CAM_SEND_STATUS)
&& (((flags & CAM_SCATTER_VALID) != 0)
|| (dxfer_len != 0)
|| (csio->sglist_cnt != 0)))
|| (((flags & CAM_SEND_STATUS) == 0)
&& (dxfer_len == 0))
|| ((flags & CAM_SCATTER_VALID)
&& (csio->sglist_cnt == 0))
|| (((flags & CAM_SCATTER_VALID) == 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.ccb_atio = atio;
if (((flags & CAM_SEND_STATUS) == 0)
&& (io != NULL))
io->io_hdr.flags |= CTL_FLAG_DMA_INPROG;
softc->ctios_sent++;
xpt_action(start_ccb);
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 void
ctlfedone(struct cam_periph *periph, union ccb *done_ccb)
{
struct ctlfe_lun_softc *softc;
struct ctlfe_softc *bus_softc;
#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;
if (done_ccb->ccb_h.ccb_type == CTLFE_CCB_WAITING) {
panic("shouldn't get to the CCB waiting case!");
wakeup(&done_ccb->ccb_h.cbfcnp);
return;
}
/*
* 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);
return;
default:
break;
}
}
switch (done_ccb->ccb_h.func_code) {
case XPT_ACCEPT_TARGET_IO: {
union ctl_io *io;
struct ccb_accept_tio *atio;
atio = &done_ccb->atio;
softc->atios_returned++;
/*
* 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;
}
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);
break;
}
case XPT_CONT_TARGET_IO: {
struct ccb_accept_tio *atio;
union ctl_io *io;
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
/*
* 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);
return;
} else {
xpt_action((union ccb *)atio);
softc->atios_sent++;
}
} 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 the isp(4) driver doesn't really
* seem to send errors back for data
* transfers that I can tell. There is one
* case where it'll send CAM_REQ_CMP_ERR,
* but probably not that many more cases.
* So set a generic data phase error here,
* like the SXP driver sets.
*/
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->resid = 0;
csio->ccb_h.ccb_atio = atio;
io->io_hdr.flags |= CTL_FLAG_DMA_INPROG;
softc->ctios_sent++;
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);
/* Call the backend move done callback */
io->scsiio.be_move_done(io);
}
}
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);
return;
}
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_ABORT:
/*
* XPT_ABORT is an immediate CCB, we shouldn't get here.
*/
panic("%s: XPT_ABORT CCB returned!", __func__);
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;
}
}
static void
ctlfe_onoffline(void *arg, int online)
{
struct ctlfe_softc *bus_softc;
union ccb *ccb;
cam_status status;
struct cam_path *path;
struct cam_sim *sim;
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_WAITOK | 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, /*priority*/ 1);
sim = xpt_path_sim(path);
/*
* 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;
CAM_SIM_LOCK(sim);
xpt_action(ccb);
CAM_SIM_UNLOCK(sim);
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;
CAM_SIM_LOCK(sim);
xpt_action(ccb);
CAM_SIM_UNLOCK(sim);
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");
}
free(ccb, M_TEMP);
xpt_free_path(path);
return;
}
static void
ctlfe_online(void *arg)
{
ctlfe_onoffline(arg, /*online*/ 1);
}
static void
ctlfe_offline(void *arg)
{
ctlfe_onoffline(arg, /*online*/ 0);
}
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;
struct cam_sim *sim;
cam_status status;
bus_softc = (struct ctlfe_softc *)arg;
status = xpt_create_path_unlocked(&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);
if (softc == NULL) {
printf("%s: could not allocate %zd bytes for softc\n",
__func__, sizeof(*softc));
xpt_free_path(path);
return (1);
}
sim = xpt_path_sim(path);
mtx_lock(sim->mtx);
periph = cam_periph_find(path, "ctl");
if (periph != NULL) {
/* We've already got a periph, no need to alloc a new one. */
xpt_free_path(path);
free(softc, M_CTLFE);
mtx_unlock(sim->mtx);
return (0);
}
softc->parent_softc = bus_softc;
STAILQ_INSERT_TAIL(&bus_softc->lun_softc_list, softc, links);
status = cam_periph_alloc(ctlferegister,
ctlfeoninvalidate,
ctlfecleanup,
ctlfestart,
"ctl",
CAM_PERIPH_BIO,
path,
ctlfeasync,
0,
softc);
mtx_unlock(sim->mtx);
xpt_free_path(path);
return (0);
}
/*
* XXX KDM we disable LUN removal here. The problem is that the isp(4)
* driver doesn't currently handle LUN removal properly. We need to keep
* enough state here at the peripheral level even after LUNs have been
* removed inside CTL.
*
* Once the isp(4) driver is fixed, this can be re-enabled.
*/
static int
ctlfe_lun_disable(void *arg, struct ctl_id targ_id, int lun_id)
{
#ifdef NOTYET
struct ctlfe_softc *softc;
struct ctlfe_lun_softc *lun_softc;
softc = (struct ctlfe_softc *)arg;
mtx_lock(softc->sim->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->sim->mtx);
printf("%s: can't find target %d lun %d\n", __func__,
targ_id.id, lun_id);
return (1);
}
cam_periph_invalidate(lun_softc->periph);
mtx_unlock(softc->sim->mtx);
#endif
return (0);
}
static void
ctlfe_dump_sim(struct cam_sim *sim)
{
int i;
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("%s%d: max_ccbs: %u, ccb_count: %u\n",
sim->sim_name, sim->unit_number,
sim->max_ccbs, sim->ccb_count);
printf("%s%d: ccb_freeq is %sempty\n",
sim->sim_name, sim->unit_number,
(SLIST_FIRST(&sim->ccb_freeq) == NULL) ? "" : "NOT ");
printf("%s%d: alloc_queue.entries %d, alloc_openings %d\n",
sim->sim_name, sim->unit_number,
sim->devq->alloc_queue.entries, sim->devq->alloc_openings);
printf("%s%d: qfrozen_cnt:", sim->sim_name, sim->unit_number);
for (i = 0; i < CAM_RL_VALUES; i++) {
printf("%s%u", (i != 0) ? ":" : "",
sim->devq->alloc_queue.qfrozen_cnt[i]);
}
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 oustanding (%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_sim *sim;
struct cam_periph *periph;
struct ctlfe_lun_softc *softc;
ccb = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
sim = xpt_path_sim(ccb->ccb_h.path);
mtx_lock(sim->mtx);
periph = xpt_path_periph(ccb->ccb_h.path);
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);
}
mtx_unlock(sim->mtx);
}
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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