336 lines
8.9 KiB
C
336 lines
8.9 KiB
C
/*-
|
|
* Copyright (c) 2014 Alexander Motin <mav@FreeBSD.org>
|
|
* Copyright (c) 2004, 2005 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, immediately at the beginning of the file.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/types.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/module.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/condvar.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/queue.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <cam/cam.h>
|
|
#include <cam/scsi/scsi_all.h>
|
|
#include <cam/scsi/scsi_da.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_backend.h>
|
|
#include <cam/ctl/ctl_ioctl.h>
|
|
#include <cam/ctl/ctl_ha.h>
|
|
#include <cam/ctl/ctl_private.h>
|
|
#include <cam/ctl/ctl_debug.h>
|
|
#include <cam/ctl/ctl_scsi_all.h>
|
|
#include <cam/ctl/ctl_tpc.h>
|
|
#include <cam/ctl/ctl_error.h>
|
|
|
|
struct tpcl_softc {
|
|
struct ctl_port port;
|
|
int cur_tag_num;
|
|
};
|
|
|
|
static struct tpcl_softc tpcl_softc;
|
|
|
|
static int tpcl_init(void);
|
|
static void tpcl_shutdown(void);
|
|
static void tpcl_datamove(union ctl_io *io);
|
|
static void tpcl_done(union ctl_io *io);
|
|
|
|
|
|
static struct ctl_frontend tpcl_frontend =
|
|
{
|
|
.name = "tpc",
|
|
.init = tpcl_init,
|
|
.shutdown = tpcl_shutdown,
|
|
};
|
|
CTL_FRONTEND_DECLARE(ctltpc, tpcl_frontend);
|
|
|
|
static int
|
|
tpcl_init(void)
|
|
{
|
|
struct tpcl_softc *tsoftc = &tpcl_softc;
|
|
struct ctl_port *port;
|
|
struct scsi_transportid_spi *tid;
|
|
int len;
|
|
|
|
memset(tsoftc, 0, sizeof(*tsoftc));
|
|
|
|
port = &tsoftc->port;
|
|
port->frontend = &tpcl_frontend;
|
|
port->port_type = CTL_PORT_INTERNAL;
|
|
port->num_requested_ctl_io = 100;
|
|
port->port_name = "tpc";
|
|
port->fe_datamove = tpcl_datamove;
|
|
port->fe_done = tpcl_done;
|
|
port->max_targets = 1;
|
|
port->max_target_id = 0;
|
|
port->targ_port = -1;
|
|
port->max_initiators = 1;
|
|
|
|
if (ctl_port_register(port) != 0) {
|
|
printf("%s: ctl_port_register() failed with error\n", __func__);
|
|
return (0);
|
|
}
|
|
|
|
len = sizeof(struct scsi_transportid_spi);
|
|
port->init_devid = malloc(sizeof(struct ctl_devid) + len,
|
|
M_CTL, M_WAITOK | M_ZERO);
|
|
port->init_devid->len = len;
|
|
tid = (struct scsi_transportid_spi *)port->init_devid->data;
|
|
tid->format_protocol = SCSI_TRN_SPI_FORMAT_DEFAULT | SCSI_PROTO_SPI;
|
|
scsi_ulto2b(0, tid->scsi_addr);
|
|
scsi_ulto2b(port->targ_port, tid->rel_trgt_port_id);
|
|
|
|
ctl_port_online(port);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
tpcl_shutdown(void)
|
|
{
|
|
struct tpcl_softc *tsoftc = &tpcl_softc;
|
|
struct ctl_port *port;
|
|
|
|
port = &tsoftc->port;
|
|
ctl_port_offline(port);
|
|
if (ctl_port_deregister(&tsoftc->port) != 0)
|
|
printf("%s: ctl_frontend_deregister() failed\n", __func__);
|
|
}
|
|
|
|
static void
|
|
tpcl_datamove(union ctl_io *io)
|
|
{
|
|
struct ctl_sg_entry *ext_sglist, *kern_sglist;
|
|
struct ctl_sg_entry ext_entry, kern_entry;
|
|
int ext_sg_entries, kern_sg_entries;
|
|
int ext_sg_start, ext_offset;
|
|
int len_to_copy, len_copied;
|
|
int kern_watermark, ext_watermark;
|
|
struct ctl_scsiio *ctsio;
|
|
int i, j;
|
|
|
|
CTL_DEBUG_PRINT(("%s\n", __func__));
|
|
|
|
ctsio = &io->scsiio;
|
|
|
|
/*
|
|
* If this is the case, we're probably doing a BBR read and don't
|
|
* actually need to transfer the data. This will effectively
|
|
* bit-bucket the data.
|
|
*/
|
|
if (ctsio->ext_data_ptr == NULL)
|
|
goto bailout;
|
|
|
|
/*
|
|
* To simplify things here, if we have a single buffer, stick it in
|
|
* a S/G entry and just make it a single entry S/G list.
|
|
*/
|
|
if (ctsio->ext_sg_entries > 0) {
|
|
int len_seen;
|
|
|
|
ext_sglist = (struct ctl_sg_entry *)ctsio->ext_data_ptr;
|
|
ext_sg_entries = ctsio->ext_sg_entries;
|
|
ext_sg_start = 0;
|
|
ext_offset = 0;
|
|
len_seen = 0;
|
|
for (i = 0; i < ext_sg_entries; i++) {
|
|
if ((len_seen + ext_sglist[i].len) >=
|
|
ctsio->ext_data_filled) {
|
|
ext_sg_start = i;
|
|
ext_offset = ctsio->ext_data_filled - len_seen;
|
|
break;
|
|
}
|
|
len_seen += ext_sglist[i].len;
|
|
}
|
|
} else {
|
|
ext_sglist = &ext_entry;
|
|
ext_sglist->addr = ctsio->ext_data_ptr;
|
|
ext_sglist->len = ctsio->ext_data_len;
|
|
ext_sg_entries = 1;
|
|
ext_sg_start = 0;
|
|
ext_offset = ctsio->ext_data_filled;
|
|
}
|
|
|
|
if (ctsio->kern_sg_entries > 0) {
|
|
kern_sglist = (struct ctl_sg_entry *)ctsio->kern_data_ptr;
|
|
kern_sg_entries = ctsio->kern_sg_entries;
|
|
} else {
|
|
kern_sglist = &kern_entry;
|
|
kern_sglist->addr = ctsio->kern_data_ptr;
|
|
kern_sglist->len = ctsio->kern_data_len;
|
|
kern_sg_entries = 1;
|
|
}
|
|
|
|
kern_watermark = 0;
|
|
ext_watermark = ext_offset;
|
|
len_copied = 0;
|
|
for (i = ext_sg_start, j = 0;
|
|
i < ext_sg_entries && j < kern_sg_entries;) {
|
|
uint8_t *ext_ptr, *kern_ptr;
|
|
|
|
len_to_copy = min(ext_sglist[i].len - ext_watermark,
|
|
kern_sglist[j].len - kern_watermark);
|
|
|
|
ext_ptr = (uint8_t *)ext_sglist[i].addr;
|
|
ext_ptr = ext_ptr + ext_watermark;
|
|
if (io->io_hdr.flags & CTL_FLAG_BUS_ADDR) {
|
|
/*
|
|
* XXX KDM fix this!
|
|
*/
|
|
panic("need to implement bus address support");
|
|
#if 0
|
|
kern_ptr = bus_to_virt(kern_sglist[j].addr);
|
|
#endif
|
|
} else
|
|
kern_ptr = (uint8_t *)kern_sglist[j].addr;
|
|
kern_ptr = kern_ptr + kern_watermark;
|
|
|
|
kern_watermark += len_to_copy;
|
|
ext_watermark += len_to_copy;
|
|
|
|
if ((ctsio->io_hdr.flags & CTL_FLAG_DATA_MASK) ==
|
|
CTL_FLAG_DATA_IN) {
|
|
CTL_DEBUG_PRINT(("%s: copying %d bytes to user\n",
|
|
__func__, len_to_copy));
|
|
CTL_DEBUG_PRINT(("%s: from %p to %p\n", __func__,
|
|
kern_ptr, ext_ptr));
|
|
memcpy(ext_ptr, kern_ptr, len_to_copy);
|
|
} else {
|
|
CTL_DEBUG_PRINT(("%s: copying %d bytes from user\n",
|
|
__func__, len_to_copy));
|
|
CTL_DEBUG_PRINT(("%s: from %p to %p\n", __func__,
|
|
ext_ptr, kern_ptr));
|
|
memcpy(kern_ptr, ext_ptr, len_to_copy);
|
|
}
|
|
|
|
len_copied += len_to_copy;
|
|
|
|
if (ext_sglist[i].len == ext_watermark) {
|
|
i++;
|
|
ext_watermark = 0;
|
|
}
|
|
|
|
if (kern_sglist[j].len == kern_watermark) {
|
|
j++;
|
|
kern_watermark = 0;
|
|
}
|
|
}
|
|
|
|
ctsio->ext_data_filled += len_copied;
|
|
|
|
CTL_DEBUG_PRINT(("%s: ext_sg_entries: %d, kern_sg_entries: %d\n",
|
|
__func__, ext_sg_entries, kern_sg_entries));
|
|
CTL_DEBUG_PRINT(("%s: ext_data_len = %d, kern_data_len = %d\n",
|
|
__func__, ctsio->ext_data_len, ctsio->kern_data_len));
|
|
|
|
/* XXX KDM set residual?? */
|
|
bailout:
|
|
io->scsiio.be_move_done(io);
|
|
}
|
|
|
|
static void
|
|
tpcl_done(union ctl_io *io)
|
|
{
|
|
|
|
tpc_done(io);
|
|
}
|
|
|
|
uint64_t
|
|
tpcl_resolve(struct ctl_softc *softc, int init_port,
|
|
struct scsi_ec_cscd *cscd, uint32_t *ss, uint32_t *ps, uint32_t *pso)
|
|
{
|
|
struct scsi_ec_cscd_id *cscdid;
|
|
struct ctl_port *port;
|
|
struct ctl_lun *lun;
|
|
uint64_t lunid = UINT64_MAX;
|
|
|
|
if (cscd->type_code != EC_CSCD_ID ||
|
|
(cscd->luidt_pdt & EC_LUIDT_MASK) != EC_LUIDT_LUN ||
|
|
(cscd->luidt_pdt & EC_NUL) != 0)
|
|
return (lunid);
|
|
|
|
cscdid = (struct scsi_ec_cscd_id *)cscd;
|
|
mtx_lock(&softc->ctl_lock);
|
|
if (init_port >= 0)
|
|
port = softc->ctl_ports[init_port];
|
|
else
|
|
port = NULL;
|
|
STAILQ_FOREACH(lun, &softc->lun_list, links) {
|
|
if (port != NULL &&
|
|
ctl_lun_map_to_port(port, lun->lun) == UINT32_MAX)
|
|
continue;
|
|
if (lun->lun_devid == NULL)
|
|
continue;
|
|
if (scsi_devid_match(lun->lun_devid->data,
|
|
lun->lun_devid->len, &cscdid->codeset,
|
|
cscdid->length + 4) == 0) {
|
|
lunid = lun->lun;
|
|
if (ss && lun->be_lun)
|
|
*ss = lun->be_lun->blocksize;
|
|
if (ps && lun->be_lun)
|
|
*ps = lun->be_lun->blocksize <<
|
|
lun->be_lun->pblockexp;
|
|
if (pso && lun->be_lun)
|
|
*pso = lun->be_lun->blocksize *
|
|
lun->be_lun->pblockoff;
|
|
break;
|
|
}
|
|
}
|
|
mtx_unlock(&softc->ctl_lock);
|
|
return (lunid);
|
|
};
|
|
|
|
union ctl_io *
|
|
tpcl_alloc_io(void)
|
|
{
|
|
struct tpcl_softc *tsoftc = &tpcl_softc;
|
|
|
|
return (ctl_alloc_io(tsoftc->port.ctl_pool_ref));
|
|
};
|
|
|
|
int
|
|
tpcl_queue(union ctl_io *io, uint64_t lun)
|
|
{
|
|
struct tpcl_softc *tsoftc = &tpcl_softc;
|
|
|
|
io->io_hdr.nexus.initid = 0;
|
|
io->io_hdr.nexus.targ_port = tsoftc->port.targ_port;
|
|
io->io_hdr.nexus.targ_lun = lun;
|
|
io->scsiio.tag_num = atomic_fetchadd_int(&tsoftc->cur_tag_num, 1);
|
|
io->scsiio.ext_data_filled = 0;
|
|
return (ctl_queue(io));
|
|
}
|