2beaefe884
- Add icl_pdu_append_bio and icl_pdu_get_bio methods. - Add new page pod routines for allocating and writing page pods for unmapped bio requests. Use these new routines for setting up DDP for iSCSI tasks with a SCSI I/O CCB which uses CAM_DATA_BIO. - When ICL_NOCOPY is used to append data from an unmapped I/O request to a PDU, construct unmapped mbufs from the relevant pages backing the struct bio. This also requires changes in the t4_push_pdus path to support unmapped mbufs. Sponsored by: Chelsio Communications Differential Revision: https://reviews.freebsd.org/D34383
1817 lines
44 KiB
C
1817 lines
44 KiB
C
/*-
|
|
* Copyright (c) 2012 The FreeBSD Foundation
|
|
* Copyright (c) 2015 Chelsio Communications, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed by Edward Tomasz Napierala under sponsorship
|
|
* from the FreeBSD Foundation.
|
|
*
|
|
* 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.
|
|
* 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 AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* cxgbei implementation of iSCSI Common Layer kobj(9) interface.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "opt_inet.h"
|
|
#include "opt_inet6.h"
|
|
|
|
#ifdef TCP_OFFLOAD
|
|
#include <sys/param.h>
|
|
#include <sys/bio.h>
|
|
#include <sys/capsicum.h>
|
|
#include <sys/condvar.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/file.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/kthread.h>
|
|
#include <sys/ktr.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/module.h>
|
|
#include <sys/protosw.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/socketvar.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/sx.h>
|
|
#include <sys/uio.h>
|
|
#include <machine/bus.h>
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_page.h>
|
|
#include <vm/pmap.h>
|
|
#include <netinet/in.h>
|
|
#include <netinet/in_pcb.h>
|
|
#include <netinet/tcp.h>
|
|
#include <netinet/tcp_var.h>
|
|
#include <netinet/toecore.h>
|
|
|
|
#include <dev/iscsi/icl.h>
|
|
#include <dev/iscsi/iscsi_proto.h>
|
|
#include <icl_conn_if.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_backend.h>
|
|
#include <cam/ctl/ctl_error.h>
|
|
#include <cam/ctl/ctl_frontend.h>
|
|
#include <cam/ctl/ctl_debug.h>
|
|
#include <cam/ctl/ctl_ha.h>
|
|
#include <cam/ctl/ctl_ioctl.h>
|
|
|
|
#include <cam/cam.h>
|
|
#include <cam/cam_ccb.h>
|
|
#include <cam/cam_xpt.h>
|
|
#include <cam/cam_debug.h>
|
|
#include <cam/cam_sim.h>
|
|
#include <cam/cam_xpt_sim.h>
|
|
#include <cam/cam_xpt_periph.h>
|
|
#include <cam/cam_periph.h>
|
|
#include <cam/cam_compat.h>
|
|
#include <cam/scsi/scsi_message.h>
|
|
|
|
#include "common/common.h"
|
|
#include "common/t4_regs.h"
|
|
#include "common/t4_tcb.h"
|
|
#include "tom/t4_tom.h"
|
|
#include "cxgbei.h"
|
|
|
|
/*
|
|
* Use the page pod tag for the TT hash.
|
|
*/
|
|
#define TT_HASH(icc, tt) (G_PPOD_TAG(tt) & (icc)->cmp_hash_mask)
|
|
|
|
struct cxgbei_ddp_state {
|
|
struct ppod_reservation prsv;
|
|
struct cxgbei_cmp cmp;
|
|
};
|
|
|
|
static MALLOC_DEFINE(M_CXGBEI, "cxgbei", "cxgbei(4)");
|
|
|
|
SYSCTL_NODE(_kern_icl, OID_AUTO, cxgbei, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
|
|
"Chelsio iSCSI offload");
|
|
static int first_burst_length = 8192;
|
|
SYSCTL_INT(_kern_icl_cxgbei, OID_AUTO, first_burst_length, CTLFLAG_RWTUN,
|
|
&first_burst_length, 0, "First burst length");
|
|
static int max_burst_length = 2 * 1024 * 1024;
|
|
SYSCTL_INT(_kern_icl_cxgbei, OID_AUTO, max_burst_length, CTLFLAG_RWTUN,
|
|
&max_burst_length, 0, "Maximum burst length");
|
|
static int sendspace = 1048576;
|
|
SYSCTL_INT(_kern_icl_cxgbei, OID_AUTO, sendspace, CTLFLAG_RWTUN,
|
|
&sendspace, 0, "Default send socket buffer size");
|
|
static int recvspace = 1048576;
|
|
SYSCTL_INT(_kern_icl_cxgbei, OID_AUTO, recvspace, CTLFLAG_RWTUN,
|
|
&recvspace, 0, "Default receive socket buffer size");
|
|
|
|
static volatile u_int icl_cxgbei_ncons;
|
|
|
|
static icl_conn_new_pdu_t icl_cxgbei_conn_new_pdu;
|
|
static icl_conn_pdu_data_segment_length_t
|
|
icl_cxgbei_conn_pdu_data_segment_length;
|
|
static icl_conn_pdu_append_bio_t icl_cxgbei_conn_pdu_append_bio;
|
|
static icl_conn_pdu_append_data_t icl_cxgbei_conn_pdu_append_data;
|
|
static icl_conn_pdu_get_bio_t icl_cxgbei_conn_pdu_get_bio;
|
|
static icl_conn_pdu_get_data_t icl_cxgbei_conn_pdu_get_data;
|
|
static icl_conn_pdu_queue_t icl_cxgbei_conn_pdu_queue;
|
|
static icl_conn_pdu_queue_cb_t icl_cxgbei_conn_pdu_queue_cb;
|
|
static icl_conn_handoff_t icl_cxgbei_conn_handoff;
|
|
static icl_conn_free_t icl_cxgbei_conn_free;
|
|
static icl_conn_close_t icl_cxgbei_conn_close;
|
|
static icl_conn_task_setup_t icl_cxgbei_conn_task_setup;
|
|
static icl_conn_task_done_t icl_cxgbei_conn_task_done;
|
|
static icl_conn_transfer_setup_t icl_cxgbei_conn_transfer_setup;
|
|
static icl_conn_transfer_done_t icl_cxgbei_conn_transfer_done;
|
|
|
|
static kobj_method_t icl_cxgbei_methods[] = {
|
|
KOBJMETHOD(icl_conn_new_pdu, icl_cxgbei_conn_new_pdu),
|
|
KOBJMETHOD(icl_conn_pdu_free, icl_cxgbei_conn_pdu_free),
|
|
KOBJMETHOD(icl_conn_pdu_data_segment_length,
|
|
icl_cxgbei_conn_pdu_data_segment_length),
|
|
KOBJMETHOD(icl_conn_pdu_append_bio, icl_cxgbei_conn_pdu_append_bio),
|
|
KOBJMETHOD(icl_conn_pdu_append_data, icl_cxgbei_conn_pdu_append_data),
|
|
KOBJMETHOD(icl_conn_pdu_get_bio, icl_cxgbei_conn_pdu_get_bio),
|
|
KOBJMETHOD(icl_conn_pdu_get_data, icl_cxgbei_conn_pdu_get_data),
|
|
KOBJMETHOD(icl_conn_pdu_queue, icl_cxgbei_conn_pdu_queue),
|
|
KOBJMETHOD(icl_conn_pdu_queue_cb, icl_cxgbei_conn_pdu_queue_cb),
|
|
KOBJMETHOD(icl_conn_handoff, icl_cxgbei_conn_handoff),
|
|
KOBJMETHOD(icl_conn_free, icl_cxgbei_conn_free),
|
|
KOBJMETHOD(icl_conn_close, icl_cxgbei_conn_close),
|
|
KOBJMETHOD(icl_conn_task_setup, icl_cxgbei_conn_task_setup),
|
|
KOBJMETHOD(icl_conn_task_done, icl_cxgbei_conn_task_done),
|
|
KOBJMETHOD(icl_conn_transfer_setup, icl_cxgbei_conn_transfer_setup),
|
|
KOBJMETHOD(icl_conn_transfer_done, icl_cxgbei_conn_transfer_done),
|
|
{ 0, 0 }
|
|
};
|
|
|
|
DEFINE_CLASS(icl_cxgbei, icl_cxgbei_methods, sizeof(struct icl_cxgbei_conn));
|
|
|
|
void
|
|
icl_cxgbei_conn_pdu_free(struct icl_conn *ic, struct icl_pdu *ip)
|
|
{
|
|
struct icl_cxgbei_pdu *icp = ip_to_icp(ip);
|
|
|
|
KASSERT(icp->ref_cnt != 0, ("freeing deleted PDU"));
|
|
MPASS(icp->icp_signature == CXGBEI_PDU_SIGNATURE);
|
|
MPASS(ic == ip->ip_conn);
|
|
|
|
m_freem(ip->ip_ahs_mbuf);
|
|
m_freem(ip->ip_data_mbuf);
|
|
m_freem(ip->ip_bhs_mbuf);
|
|
|
|
KASSERT(ic != NULL || icp->ref_cnt == 1,
|
|
("orphaned PDU has oustanding references"));
|
|
|
|
if (atomic_fetchadd_int(&icp->ref_cnt, -1) != 1)
|
|
return;
|
|
|
|
free(icp, M_CXGBEI);
|
|
#ifdef DIAGNOSTIC
|
|
if (__predict_true(ic != NULL))
|
|
refcount_release(&ic->ic_outstanding_pdus);
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
icl_cxgbei_pdu_call_cb(struct icl_pdu *ip)
|
|
{
|
|
struct icl_cxgbei_pdu *icp = ip_to_icp(ip);
|
|
|
|
MPASS(icp->icp_signature == CXGBEI_PDU_SIGNATURE);
|
|
|
|
if (icp->cb != NULL)
|
|
icp->cb(ip, icp->error);
|
|
#ifdef DIAGNOSTIC
|
|
if (__predict_true(ip->ip_conn != NULL))
|
|
refcount_release(&ip->ip_conn->ic_outstanding_pdus);
|
|
#endif
|
|
free(icp, M_CXGBEI);
|
|
}
|
|
|
|
static void
|
|
icl_cxgbei_pdu_done(struct icl_pdu *ip, int error)
|
|
{
|
|
struct icl_cxgbei_pdu *icp = ip_to_icp(ip);
|
|
|
|
if (error != 0)
|
|
icp->error = error;
|
|
|
|
m_freem(ip->ip_ahs_mbuf);
|
|
ip->ip_ahs_mbuf = NULL;
|
|
m_freem(ip->ip_data_mbuf);
|
|
ip->ip_data_mbuf = NULL;
|
|
m_freem(ip->ip_bhs_mbuf);
|
|
ip->ip_bhs_mbuf = NULL;
|
|
|
|
/*
|
|
* All other references to this PDU should have been dropped
|
|
* by the m_freem() of ip_data_mbuf.
|
|
*/
|
|
if (atomic_fetchadd_int(&icp->ref_cnt, -1) == 1)
|
|
icl_cxgbei_pdu_call_cb(ip);
|
|
else
|
|
__assert_unreachable();
|
|
}
|
|
|
|
static void
|
|
icl_cxgbei_mbuf_done(struct mbuf *mb)
|
|
{
|
|
|
|
struct icl_cxgbei_pdu *icp = (struct icl_cxgbei_pdu *)mb->m_ext.ext_arg1;
|
|
|
|
/*
|
|
* NB: mb_free_mext() might leave ref_cnt as 1 without
|
|
* decrementing it if it hits the fast path in the ref_cnt
|
|
* check.
|
|
*/
|
|
icl_cxgbei_pdu_call_cb(&icp->ip);
|
|
}
|
|
|
|
struct icl_pdu *
|
|
icl_cxgbei_new_pdu(int flags)
|
|
{
|
|
struct icl_cxgbei_pdu *icp;
|
|
struct icl_pdu *ip;
|
|
struct mbuf *m;
|
|
|
|
icp = malloc(sizeof(*icp), M_CXGBEI, flags | M_ZERO);
|
|
if (__predict_false(icp == NULL))
|
|
return (NULL);
|
|
|
|
icp->icp_signature = CXGBEI_PDU_SIGNATURE;
|
|
icp->ref_cnt = 1;
|
|
ip = &icp->ip;
|
|
|
|
m = m_gethdr(flags, MT_DATA);
|
|
if (__predict_false(m == NULL)) {
|
|
free(icp, M_CXGBEI);
|
|
return (NULL);
|
|
}
|
|
|
|
ip->ip_bhs_mbuf = m;
|
|
ip->ip_bhs = mtod(m, struct iscsi_bhs *);
|
|
memset(ip->ip_bhs, 0, sizeof(*ip->ip_bhs));
|
|
m->m_len = sizeof(struct iscsi_bhs);
|
|
m->m_pkthdr.len = m->m_len;
|
|
|
|
return (ip);
|
|
}
|
|
|
|
void
|
|
icl_cxgbei_new_pdu_set_conn(struct icl_pdu *ip, struct icl_conn *ic)
|
|
{
|
|
|
|
ip->ip_conn = ic;
|
|
#ifdef DIAGNOSTIC
|
|
refcount_acquire(&ic->ic_outstanding_pdus);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Allocate icl_pdu with empty BHS to fill up by the caller.
|
|
*/
|
|
static struct icl_pdu *
|
|
icl_cxgbei_conn_new_pdu(struct icl_conn *ic, int flags)
|
|
{
|
|
struct icl_pdu *ip;
|
|
|
|
ip = icl_cxgbei_new_pdu(flags);
|
|
if (__predict_false(ip == NULL))
|
|
return (NULL);
|
|
icl_cxgbei_new_pdu_set_conn(ip, ic);
|
|
|
|
return (ip);
|
|
}
|
|
|
|
static size_t
|
|
icl_pdu_data_segment_length(const struct icl_pdu *request)
|
|
{
|
|
uint32_t len = 0;
|
|
|
|
len += request->ip_bhs->bhs_data_segment_len[0];
|
|
len <<= 8;
|
|
len += request->ip_bhs->bhs_data_segment_len[1];
|
|
len <<= 8;
|
|
len += request->ip_bhs->bhs_data_segment_len[2];
|
|
|
|
return (len);
|
|
}
|
|
|
|
size_t
|
|
icl_cxgbei_conn_pdu_data_segment_length(struct icl_conn *ic,
|
|
const struct icl_pdu *request)
|
|
{
|
|
|
|
return (icl_pdu_data_segment_length(request));
|
|
}
|
|
|
|
static struct mbuf *
|
|
finalize_pdu(struct icl_cxgbei_conn *icc, struct icl_cxgbei_pdu *icp)
|
|
{
|
|
struct icl_pdu *ip = &icp->ip;
|
|
uint8_t ulp_submode, padding;
|
|
struct mbuf *m, *last;
|
|
struct iscsi_bhs *bhs;
|
|
int data_len;
|
|
|
|
/*
|
|
* Fix up the data segment mbuf first.
|
|
*/
|
|
m = ip->ip_data_mbuf;
|
|
ulp_submode = icc->ulp_submode;
|
|
if (m != NULL) {
|
|
last = m_last(m);
|
|
|
|
/*
|
|
* Round up the data segment to a 4B boundary. Pad with 0 if
|
|
* necessary. There will definitely be room in the mbuf.
|
|
*/
|
|
padding = roundup2(ip->ip_data_len, 4) - ip->ip_data_len;
|
|
if (padding != 0) {
|
|
MPASS(padding <= M_TRAILINGSPACE(last));
|
|
bzero(mtod(last, uint8_t *) + last->m_len, padding);
|
|
last->m_len += padding;
|
|
}
|
|
} else {
|
|
MPASS(ip->ip_data_len == 0);
|
|
ulp_submode &= ~ULP_CRC_DATA;
|
|
padding = 0;
|
|
}
|
|
|
|
/*
|
|
* Now the header mbuf that has the BHS.
|
|
*/
|
|
m = ip->ip_bhs_mbuf;
|
|
MPASS(m->m_pkthdr.len == sizeof(struct iscsi_bhs));
|
|
MPASS(m->m_len == sizeof(struct iscsi_bhs));
|
|
|
|
bhs = ip->ip_bhs;
|
|
data_len = ip->ip_data_len;
|
|
if (data_len > icc->ic.ic_max_send_data_segment_length) {
|
|
struct iscsi_bhs_data_in *bhsdi;
|
|
int flags;
|
|
|
|
KASSERT(padding == 0, ("%s: ISO with padding %d for icp %p",
|
|
__func__, padding, icp));
|
|
switch (bhs->bhs_opcode) {
|
|
case ISCSI_BHS_OPCODE_SCSI_DATA_OUT:
|
|
flags = 1;
|
|
break;
|
|
case ISCSI_BHS_OPCODE_SCSI_DATA_IN:
|
|
flags = 2;
|
|
break;
|
|
default:
|
|
panic("invalid opcode %#x for ISO", bhs->bhs_opcode);
|
|
}
|
|
data_len = icc->ic.ic_max_send_data_segment_length;
|
|
bhsdi = (struct iscsi_bhs_data_in *)bhs;
|
|
if (bhsdi->bhsdi_flags & BHSDI_FLAGS_F) {
|
|
/*
|
|
* Firmware will set F on the final PDU in the
|
|
* burst.
|
|
*/
|
|
flags |= CXGBE_ISO_F;
|
|
bhsdi->bhsdi_flags &= ~BHSDI_FLAGS_F;
|
|
}
|
|
set_mbuf_iscsi_iso(m, true);
|
|
set_mbuf_iscsi_iso_flags(m, flags);
|
|
set_mbuf_iscsi_iso_mss(m, data_len);
|
|
}
|
|
|
|
bhs->bhs_data_segment_len[2] = data_len;
|
|
bhs->bhs_data_segment_len[1] = data_len >> 8;
|
|
bhs->bhs_data_segment_len[0] = data_len >> 16;
|
|
|
|
/*
|
|
* Extract mbuf chain from PDU.
|
|
*/
|
|
m->m_pkthdr.len += ip->ip_data_len + padding;
|
|
m->m_next = ip->ip_data_mbuf;
|
|
set_mbuf_ulp_submode(m, ulp_submode);
|
|
ip->ip_bhs_mbuf = NULL;
|
|
ip->ip_data_mbuf = NULL;
|
|
ip->ip_bhs = NULL;
|
|
|
|
/*
|
|
* Drop PDU reference on icp. Additional references might
|
|
* still be held by zero-copy PDU buffers (ICL_NOCOPY).
|
|
*/
|
|
if (atomic_fetchadd_int(&icp->ref_cnt, -1) == 1)
|
|
icl_cxgbei_pdu_call_cb(ip);
|
|
|
|
return (m);
|
|
}
|
|
|
|
static void
|
|
icl_cxgbei_tx_main(void *arg)
|
|
{
|
|
struct epoch_tracker et;
|
|
struct icl_cxgbei_conn *icc = arg;
|
|
struct icl_conn *ic = &icc->ic;
|
|
struct toepcb *toep = icc->toep;
|
|
struct socket *so = ic->ic_socket;
|
|
struct inpcb *inp = sotoinpcb(so);
|
|
struct icl_pdu *ip;
|
|
struct mbuf *m;
|
|
struct mbufq mq;
|
|
STAILQ_HEAD(, icl_pdu) tx_pdus = STAILQ_HEAD_INITIALIZER(tx_pdus);
|
|
|
|
mbufq_init(&mq, INT_MAX);
|
|
|
|
ICL_CONN_LOCK(ic);
|
|
while (__predict_true(!ic->ic_disconnecting)) {
|
|
while (STAILQ_EMPTY(&icc->sent_pdus)) {
|
|
icc->tx_active = false;
|
|
mtx_sleep(&icc->tx_active, ic->ic_lock, 0, "-", 0);
|
|
if (__predict_false(ic->ic_disconnecting))
|
|
goto out;
|
|
MPASS(icc->tx_active);
|
|
}
|
|
|
|
STAILQ_SWAP(&icc->sent_pdus, &tx_pdus, icl_pdu);
|
|
ICL_CONN_UNLOCK(ic);
|
|
|
|
while ((ip = STAILQ_FIRST(&tx_pdus)) != NULL) {
|
|
STAILQ_REMOVE_HEAD(&tx_pdus, ip_next);
|
|
|
|
m = finalize_pdu(icc, ip_to_icp(ip));
|
|
M_ASSERTPKTHDR(m);
|
|
MPASS((m->m_pkthdr.len & 3) == 0);
|
|
|
|
mbufq_enqueue(&mq, m);
|
|
}
|
|
|
|
ICL_CONN_LOCK(ic);
|
|
if (__predict_false(ic->ic_disconnecting) ||
|
|
__predict_false(ic->ic_socket == NULL)) {
|
|
mbufq_drain(&mq);
|
|
break;
|
|
}
|
|
|
|
CURVNET_SET(toep->vnet);
|
|
NET_EPOCH_ENTER(et);
|
|
INP_WLOCK(inp);
|
|
|
|
ICL_CONN_UNLOCK(ic);
|
|
if (__predict_false(inp->inp_flags & (INP_DROPPED |
|
|
INP_TIMEWAIT)) ||
|
|
__predict_false((toep->flags & TPF_ATTACHED) == 0)) {
|
|
mbufq_drain(&mq);
|
|
} else {
|
|
mbufq_concat(&toep->ulp_pduq, &mq);
|
|
t4_push_pdus(icc->sc, toep, 0);
|
|
}
|
|
INP_WUNLOCK(inp);
|
|
NET_EPOCH_EXIT(et);
|
|
CURVNET_RESTORE();
|
|
|
|
ICL_CONN_LOCK(ic);
|
|
}
|
|
out:
|
|
ICL_CONN_UNLOCK(ic);
|
|
|
|
kthread_exit();
|
|
}
|
|
|
|
static void
|
|
icl_cxgbei_rx_main(void *arg)
|
|
{
|
|
struct icl_cxgbei_conn *icc = arg;
|
|
struct icl_conn *ic = &icc->ic;
|
|
struct icl_pdu *ip;
|
|
struct sockbuf *sb;
|
|
STAILQ_HEAD(, icl_pdu) rx_pdus = STAILQ_HEAD_INITIALIZER(rx_pdus);
|
|
bool cantrcvmore;
|
|
|
|
sb = &ic->ic_socket->so_rcv;
|
|
SOCKBUF_LOCK(sb);
|
|
while (__predict_true(!ic->ic_disconnecting)) {
|
|
while (STAILQ_EMPTY(&icc->rcvd_pdus)) {
|
|
icc->rx_active = false;
|
|
mtx_sleep(&icc->rx_active, SOCKBUF_MTX(sb), 0, "-", 0);
|
|
if (__predict_false(ic->ic_disconnecting))
|
|
goto out;
|
|
MPASS(icc->rx_active);
|
|
}
|
|
|
|
if (__predict_false(sbused(sb)) != 0) {
|
|
/*
|
|
* PDUs were received before the tid
|
|
* transitioned to ULP mode. Convert
|
|
* them to icl_cxgbei_pdus and insert
|
|
* them into the head of rcvd_pdus.
|
|
*/
|
|
parse_pdus(icc, sb);
|
|
}
|
|
cantrcvmore = (sb->sb_state & SBS_CANTRCVMORE) != 0;
|
|
MPASS(STAILQ_EMPTY(&rx_pdus));
|
|
STAILQ_SWAP(&icc->rcvd_pdus, &rx_pdus, icl_pdu);
|
|
SOCKBUF_UNLOCK(sb);
|
|
|
|
/* Hand over PDUs to ICL. */
|
|
while ((ip = STAILQ_FIRST(&rx_pdus)) != NULL) {
|
|
STAILQ_REMOVE_HEAD(&rx_pdus, ip_next);
|
|
if (cantrcvmore)
|
|
icl_cxgbei_pdu_done(ip, ENOTCONN);
|
|
else
|
|
ic->ic_receive(ip);
|
|
}
|
|
|
|
SOCKBUF_LOCK(sb);
|
|
}
|
|
out:
|
|
/*
|
|
* Since ic_disconnecting is set before the SOCKBUF_MTX is
|
|
* locked in icl_cxgbei_conn_close, the loop above can exit
|
|
* before icl_cxgbei_conn_close can lock SOCKBUF_MTX and block
|
|
* waiting for the thread exit.
|
|
*/
|
|
while (!icc->rx_exiting)
|
|
mtx_sleep(&icc->rx_active, SOCKBUF_MTX(sb), 0, "-", 0);
|
|
SOCKBUF_UNLOCK(sb);
|
|
|
|
kthread_exit();
|
|
}
|
|
|
|
static void
|
|
cxgbei_free_mext_pg(struct mbuf *m)
|
|
{
|
|
struct icl_cxgbei_pdu *icp;
|
|
|
|
M_ASSERTEXTPG(m);
|
|
|
|
/*
|
|
* Nothing to do for the pages; they are owned by the PDU /
|
|
* I/O request.
|
|
*/
|
|
|
|
/* Drop reference on the PDU. */
|
|
icp = m->m_ext.ext_arg1;
|
|
if (atomic_fetchadd_int(&icp->ref_cnt, -1) == 1)
|
|
icl_cxgbei_pdu_call_cb(&icp->ip);
|
|
}
|
|
|
|
static struct mbuf *
|
|
cxgbei_getm(size_t len, int flags)
|
|
{
|
|
struct mbuf *m, *m0, *m_tail;
|
|
|
|
m_tail = m0 = NULL;
|
|
|
|
/* Allocate as jumbo mbufs of size MJUM16BYTES. */
|
|
while (len >= MJUM16BYTES) {
|
|
m = m_getjcl(M_NOWAIT, MT_DATA, 0, MJUM16BYTES);
|
|
if (__predict_false(m == NULL)) {
|
|
if ((flags & M_WAITOK) != 0) {
|
|
/* Fall back to non-jumbo mbufs. */
|
|
break;
|
|
}
|
|
return (NULL);
|
|
}
|
|
if (m0 == NULL) {
|
|
m0 = m_tail = m;
|
|
} else {
|
|
m_tail->m_next = m;
|
|
m_tail = m;
|
|
}
|
|
len -= MJUM16BYTES;
|
|
}
|
|
|
|
/* Allocate mbuf chain for the remaining data. */
|
|
if (len != 0) {
|
|
m = m_getm2(NULL, len, flags, MT_DATA, 0);
|
|
if (__predict_false(m == NULL)) {
|
|
m_freem(m0);
|
|
return (NULL);
|
|
}
|
|
if (m0 == NULL)
|
|
m0 = m;
|
|
else
|
|
m_tail->m_next = m;
|
|
}
|
|
|
|
return (m0);
|
|
}
|
|
|
|
int
|
|
icl_cxgbei_conn_pdu_append_bio(struct icl_conn *ic, struct icl_pdu *ip,
|
|
struct bio *bp, size_t offset, size_t len, int flags)
|
|
{
|
|
struct icl_cxgbei_pdu *icp = ip_to_icp(ip);
|
|
struct mbuf *m, *m_tail;
|
|
vm_offset_t vaddr;
|
|
size_t page_offset, todo, mtodo;
|
|
boolean_t mapped;
|
|
int i;
|
|
|
|
MPASS(icp->icp_signature == CXGBEI_PDU_SIGNATURE);
|
|
MPASS(ic == ip->ip_conn);
|
|
KASSERT(len > 0, ("%s: len is %jd", __func__, (intmax_t)len));
|
|
|
|
m_tail = ip->ip_data_mbuf;
|
|
if (m_tail != NULL)
|
|
for (; m_tail->m_next != NULL; m_tail = m_tail->m_next)
|
|
;
|
|
|
|
MPASS(bp->bio_flags & BIO_UNMAPPED);
|
|
if (offset < PAGE_SIZE - bp->bio_ma_offset) {
|
|
page_offset = bp->bio_ma_offset + offset;
|
|
i = 0;
|
|
} else {
|
|
offset -= PAGE_SIZE - bp->bio_ma_offset;
|
|
for (i = 1; offset >= PAGE_SIZE; i++)
|
|
offset -= PAGE_SIZE;
|
|
page_offset = offset;
|
|
}
|
|
|
|
if (flags & ICL_NOCOPY) {
|
|
m = NULL;
|
|
while (len > 0) {
|
|
if (m == NULL) {
|
|
m = mb_alloc_ext_pgs(flags & ~ICL_NOCOPY,
|
|
cxgbei_free_mext_pg);
|
|
if (__predict_false(m == NULL))
|
|
return (ENOMEM);
|
|
atomic_add_int(&icp->ref_cnt, 1);
|
|
m->m_ext.ext_arg1 = icp;
|
|
m->m_epg_1st_off = page_offset;
|
|
}
|
|
|
|
todo = MIN(len, PAGE_SIZE - page_offset);
|
|
|
|
m->m_epg_pa[m->m_epg_npgs] =
|
|
VM_PAGE_TO_PHYS(bp->bio_ma[i]);
|
|
m->m_epg_npgs++;
|
|
m->m_epg_last_len = todo;
|
|
m->m_len += todo;
|
|
m->m_ext.ext_size += PAGE_SIZE;
|
|
MBUF_EXT_PGS_ASSERT_SANITY(m);
|
|
|
|
if (m->m_epg_npgs == MBUF_PEXT_MAX_PGS) {
|
|
if (m_tail != NULL)
|
|
m_tail->m_next = m;
|
|
else
|
|
ip->ip_data_mbuf = m;
|
|
m_tail = m;
|
|
ip->ip_data_len += m->m_len;
|
|
m = NULL;
|
|
}
|
|
|
|
page_offset = 0;
|
|
len -= todo;
|
|
i++;
|
|
}
|
|
|
|
if (m != NULL) {
|
|
if (m_tail != NULL)
|
|
m_tail->m_next = m;
|
|
else
|
|
ip->ip_data_mbuf = m;
|
|
ip->ip_data_len += m->m_len;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
m = cxgbei_getm(len, flags);
|
|
if (__predict_false(m == NULL))
|
|
return (ENOMEM);
|
|
|
|
if (ip->ip_data_mbuf == NULL) {
|
|
ip->ip_data_mbuf = m;
|
|
ip->ip_data_len = len;
|
|
} else {
|
|
m_tail->m_next = m;
|
|
ip->ip_data_len += len;
|
|
}
|
|
|
|
while (len > 0) {
|
|
todo = MIN(len, PAGE_SIZE - page_offset);
|
|
|
|
mapped = pmap_map_io_transient(bp->bio_ma + i, &vaddr, 1,
|
|
FALSE);
|
|
|
|
do {
|
|
mtodo = min(todo, M_SIZE(m) - m->m_len);
|
|
memcpy(mtod(m, char *) + m->m_len, (char *)vaddr +
|
|
page_offset, mtodo);
|
|
m->m_len += mtodo;
|
|
if (m->m_len == M_SIZE(m))
|
|
m = m->m_next;
|
|
page_offset += mtodo;
|
|
todo -= mtodo;
|
|
} while (todo > 0);
|
|
|
|
if (__predict_false(mapped))
|
|
pmap_unmap_io_transient(bp->bio_ma + 1, &vaddr, 1,
|
|
FALSE);
|
|
|
|
page_offset = 0;
|
|
len -= todo;
|
|
i++;
|
|
}
|
|
|
|
MPASS(ip->ip_data_len <= max(ic->ic_max_send_data_segment_length,
|
|
ic->ic_hw_isomax));
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
icl_cxgbei_conn_pdu_append_data(struct icl_conn *ic, struct icl_pdu *ip,
|
|
const void *addr, size_t len, int flags)
|
|
{
|
|
struct icl_cxgbei_pdu *icp = ip_to_icp(ip);
|
|
struct mbuf *m, *m_tail;
|
|
const char *src;
|
|
|
|
MPASS(icp->icp_signature == CXGBEI_PDU_SIGNATURE);
|
|
MPASS(ic == ip->ip_conn);
|
|
KASSERT(len > 0, ("%s: len is %jd", __func__, (intmax_t)len));
|
|
|
|
m_tail = ip->ip_data_mbuf;
|
|
if (m_tail != NULL)
|
|
for (; m_tail->m_next != NULL; m_tail = m_tail->m_next)
|
|
;
|
|
|
|
if (flags & ICL_NOCOPY) {
|
|
m = m_get(flags & ~ICL_NOCOPY, MT_DATA);
|
|
if (m == NULL) {
|
|
ICL_WARN("failed to allocate mbuf");
|
|
return (ENOMEM);
|
|
}
|
|
|
|
m->m_flags |= M_RDONLY;
|
|
m_extaddref(m, __DECONST(char *, addr), len, &icp->ref_cnt,
|
|
icl_cxgbei_mbuf_done, icp, NULL);
|
|
m->m_len = len;
|
|
if (ip->ip_data_mbuf == NULL) {
|
|
ip->ip_data_mbuf = m;
|
|
ip->ip_data_len = len;
|
|
} else {
|
|
m_tail->m_next = m;
|
|
m_tail = m_tail->m_next;
|
|
ip->ip_data_len += len;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
m = cxgbei_getm(len, flags);
|
|
if (__predict_false(m == NULL))
|
|
return (ENOMEM);
|
|
|
|
if (ip->ip_data_mbuf == NULL) {
|
|
ip->ip_data_mbuf = m;
|
|
ip->ip_data_len = len;
|
|
} else {
|
|
m_tail->m_next = m;
|
|
ip->ip_data_len += len;
|
|
}
|
|
src = (const char *)addr;
|
|
for (; m != NULL; m = m->m_next) {
|
|
m->m_len = min(len, M_SIZE(m));
|
|
memcpy(mtod(m, void *), src, m->m_len);
|
|
src += m->m_len;
|
|
len -= m->m_len;
|
|
}
|
|
MPASS(len == 0);
|
|
|
|
MPASS(ip->ip_data_len <= max(ic->ic_max_send_data_segment_length,
|
|
ic->ic_hw_isomax));
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
icl_cxgbei_conn_pdu_get_bio(struct icl_conn *ic, struct icl_pdu *ip,
|
|
size_t pdu_off, struct bio *bp, size_t bio_off, size_t len)
|
|
{
|
|
struct icl_cxgbei_pdu *icp = ip_to_icp(ip);
|
|
vm_offset_t vaddr;
|
|
size_t page_offset, todo;
|
|
boolean_t mapped;
|
|
int i;
|
|
|
|
if (icp->icp_flags & ICPF_RX_DDP)
|
|
return; /* data is DDP'ed, no need to copy */
|
|
|
|
MPASS(bp->bio_flags & BIO_UNMAPPED);
|
|
if (bio_off < PAGE_SIZE - bp->bio_ma_offset) {
|
|
page_offset = bp->bio_ma_offset + bio_off;
|
|
i = 0;
|
|
} else {
|
|
bio_off -= PAGE_SIZE - bp->bio_ma_offset;
|
|
for (i = 1; bio_off >= PAGE_SIZE; i++)
|
|
bio_off -= PAGE_SIZE;
|
|
page_offset = bio_off;
|
|
}
|
|
|
|
while (len > 0) {
|
|
todo = MIN(len, PAGE_SIZE - page_offset);
|
|
|
|
mapped = pmap_map_io_transient(bp->bio_ma + i, &vaddr, 1,
|
|
FALSE);
|
|
m_copydata(ip->ip_data_mbuf, pdu_off, todo, (char *)vaddr +
|
|
page_offset);
|
|
if (__predict_false(mapped))
|
|
pmap_unmap_io_transient(bp->bio_ma + 1, &vaddr, 1,
|
|
FALSE);
|
|
|
|
page_offset = 0;
|
|
pdu_off += todo;
|
|
len -= todo;
|
|
i++;
|
|
}
|
|
}
|
|
|
|
void
|
|
icl_cxgbei_conn_pdu_get_data(struct icl_conn *ic, struct icl_pdu *ip,
|
|
size_t off, void *addr, size_t len)
|
|
{
|
|
struct icl_cxgbei_pdu *icp = ip_to_icp(ip);
|
|
|
|
if (icp->icp_flags & ICPF_RX_DDP)
|
|
return; /* data is DDP'ed, no need to copy */
|
|
m_copydata(ip->ip_data_mbuf, off, len, addr);
|
|
}
|
|
|
|
void
|
|
icl_cxgbei_conn_pdu_queue(struct icl_conn *ic, struct icl_pdu *ip)
|
|
{
|
|
icl_cxgbei_conn_pdu_queue_cb(ic, ip, NULL);
|
|
}
|
|
|
|
void
|
|
icl_cxgbei_conn_pdu_queue_cb(struct icl_conn *ic, struct icl_pdu *ip,
|
|
icl_pdu_cb cb)
|
|
{
|
|
struct icl_cxgbei_conn *icc = ic_to_icc(ic);
|
|
struct icl_cxgbei_pdu *icp = ip_to_icp(ip);
|
|
struct socket *so = ic->ic_socket;
|
|
|
|
MPASS(ic == ip->ip_conn);
|
|
MPASS(ip->ip_bhs_mbuf != NULL);
|
|
/* The kernel doesn't generate PDUs with AHS. */
|
|
MPASS(ip->ip_ahs_mbuf == NULL && ip->ip_ahs_len == 0);
|
|
|
|
ICL_CONN_LOCK_ASSERT(ic);
|
|
|
|
icp->cb = cb;
|
|
|
|
/* NOTE: sowriteable without so_snd lock is a mostly harmless race. */
|
|
if (ic->ic_disconnecting || so == NULL || !sowriteable(so)) {
|
|
icl_cxgbei_pdu_done(ip, ENOTCONN);
|
|
return;
|
|
}
|
|
|
|
STAILQ_INSERT_TAIL(&icc->sent_pdus, ip, ip_next);
|
|
if (!icc->tx_active) {
|
|
icc->tx_active = true;
|
|
wakeup(&icc->tx_active);
|
|
}
|
|
}
|
|
|
|
static struct icl_conn *
|
|
icl_cxgbei_new_conn(const char *name, struct mtx *lock)
|
|
{
|
|
struct icl_cxgbei_conn *icc;
|
|
struct icl_conn *ic;
|
|
|
|
refcount_acquire(&icl_cxgbei_ncons);
|
|
|
|
icc = (struct icl_cxgbei_conn *)kobj_create(&icl_cxgbei_class, M_CXGBE,
|
|
M_WAITOK | M_ZERO);
|
|
icc->icc_signature = CXGBEI_CONN_SIGNATURE;
|
|
STAILQ_INIT(&icc->rcvd_pdus);
|
|
STAILQ_INIT(&icc->sent_pdus);
|
|
|
|
icc->cmp_table = hashinit(64, M_CXGBEI, &icc->cmp_hash_mask);
|
|
mtx_init(&icc->cmp_lock, "cxgbei_cmp", NULL, MTX_DEF);
|
|
|
|
ic = &icc->ic;
|
|
ic->ic_lock = lock;
|
|
|
|
#ifdef DIAGNOSTIC
|
|
refcount_init(&ic->ic_outstanding_pdus, 0);
|
|
#endif
|
|
ic->ic_name = name;
|
|
ic->ic_offload = "cxgbei";
|
|
ic->ic_unmapped = true;
|
|
|
|
CTR2(KTR_CXGBE, "%s: icc %p", __func__, icc);
|
|
|
|
return (ic);
|
|
}
|
|
|
|
void
|
|
icl_cxgbei_conn_free(struct icl_conn *ic)
|
|
{
|
|
struct icl_cxgbei_conn *icc = ic_to_icc(ic);
|
|
|
|
MPASS(icc->icc_signature == CXGBEI_CONN_SIGNATURE);
|
|
|
|
CTR2(KTR_CXGBE, "%s: icc %p", __func__, icc);
|
|
|
|
mtx_destroy(&icc->cmp_lock);
|
|
hashdestroy(icc->cmp_table, M_CXGBEI, icc->cmp_hash_mask);
|
|
kobj_delete((struct kobj *)icc, M_CXGBE);
|
|
refcount_release(&icl_cxgbei_ncons);
|
|
}
|
|
|
|
static int
|
|
icl_cxgbei_setsockopt(struct icl_conn *ic, struct socket *so, int sspace,
|
|
int rspace)
|
|
{
|
|
struct sockopt opt;
|
|
int error, one = 1, ss, rs;
|
|
|
|
ss = max(sendspace, sspace);
|
|
rs = max(recvspace, rspace);
|
|
|
|
error = soreserve(so, ss, rs);
|
|
if (error != 0)
|
|
return (error);
|
|
SOCKBUF_LOCK(&so->so_snd);
|
|
so->so_snd.sb_flags |= SB_AUTOSIZE;
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
SOCKBUF_LOCK(&so->so_rcv);
|
|
so->so_rcv.sb_flags |= SB_AUTOSIZE;
|
|
SOCKBUF_UNLOCK(&so->so_rcv);
|
|
|
|
/*
|
|
* Disable Nagle.
|
|
*/
|
|
bzero(&opt, sizeof(opt));
|
|
opt.sopt_dir = SOPT_SET;
|
|
opt.sopt_level = IPPROTO_TCP;
|
|
opt.sopt_name = TCP_NODELAY;
|
|
opt.sopt_val = &one;
|
|
opt.sopt_valsize = sizeof(one);
|
|
error = sosetopt(so, &opt);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Request/response structure used to find out the adapter offloading a socket.
|
|
*/
|
|
struct find_ofld_adapter_rr {
|
|
struct socket *so;
|
|
struct adapter *sc; /* result */
|
|
};
|
|
|
|
static void
|
|
find_offload_adapter(struct adapter *sc, void *arg)
|
|
{
|
|
struct find_ofld_adapter_rr *fa = arg;
|
|
struct socket *so = fa->so;
|
|
struct tom_data *td = sc->tom_softc;
|
|
struct tcpcb *tp;
|
|
struct inpcb *inp;
|
|
|
|
/* Non-TCP were filtered out earlier. */
|
|
MPASS(so->so_proto->pr_protocol == IPPROTO_TCP);
|
|
|
|
if (fa->sc != NULL)
|
|
return; /* Found already. */
|
|
|
|
if (td == NULL)
|
|
return; /* TOE not enabled on this adapter. */
|
|
|
|
inp = sotoinpcb(so);
|
|
INP_WLOCK(inp);
|
|
if ((inp->inp_flags & (INP_DROPPED | INP_TIMEWAIT)) == 0) {
|
|
tp = intotcpcb(inp);
|
|
if (tp->t_flags & TF_TOE && tp->tod == &td->tod)
|
|
fa->sc = sc; /* Found. */
|
|
}
|
|
INP_WUNLOCK(inp);
|
|
}
|
|
|
|
static bool
|
|
is_memfree(struct adapter *sc)
|
|
{
|
|
uint32_t em;
|
|
|
|
em = t4_read_reg(sc, A_MA_TARGET_MEM_ENABLE);
|
|
if ((em & F_EXT_MEM_ENABLE) != 0)
|
|
return (false);
|
|
if (is_t5(sc) && (em & F_EXT_MEM1_ENABLE) != 0)
|
|
return (false);
|
|
return (true);
|
|
}
|
|
|
|
/* XXXNP: move this to t4_tom. */
|
|
static void
|
|
send_iscsi_flowc_wr(struct adapter *sc, struct toepcb *toep, int maxlen)
|
|
{
|
|
struct wrqe *wr;
|
|
struct fw_flowc_wr *flowc;
|
|
const u_int nparams = 1;
|
|
u_int flowclen;
|
|
struct ofld_tx_sdesc *txsd = &toep->txsd[toep->txsd_pidx];
|
|
|
|
flowclen = sizeof(*flowc) + nparams * sizeof(struct fw_flowc_mnemval);
|
|
|
|
wr = alloc_wrqe(roundup2(flowclen, 16), &toep->ofld_txq->wrq);
|
|
if (wr == NULL) {
|
|
/* XXX */
|
|
panic("%s: allocation failure.", __func__);
|
|
}
|
|
flowc = wrtod(wr);
|
|
memset(flowc, 0, wr->wr_len);
|
|
|
|
flowc->op_to_nparams = htobe32(V_FW_WR_OP(FW_FLOWC_WR) |
|
|
V_FW_FLOWC_WR_NPARAMS(nparams));
|
|
flowc->flowid_len16 = htonl(V_FW_WR_LEN16(howmany(flowclen, 16)) |
|
|
V_FW_WR_FLOWID(toep->tid));
|
|
|
|
flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX;
|
|
flowc->mnemval[0].val = htobe32(maxlen);
|
|
|
|
txsd->tx_credits = howmany(flowclen, 16);
|
|
txsd->plen = 0;
|
|
KASSERT(toep->tx_credits >= txsd->tx_credits && toep->txsd_avail > 0,
|
|
("%s: not enough credits (%d)", __func__, toep->tx_credits));
|
|
toep->tx_credits -= txsd->tx_credits;
|
|
if (__predict_false(++toep->txsd_pidx == toep->txsd_total))
|
|
toep->txsd_pidx = 0;
|
|
toep->txsd_avail--;
|
|
|
|
t4_wrq_tx(sc, wr);
|
|
}
|
|
|
|
static void
|
|
set_ulp_mode_iscsi(struct adapter *sc, struct toepcb *toep, u_int ulp_submode)
|
|
{
|
|
uint64_t val;
|
|
|
|
CTR3(KTR_CXGBE, "%s: tid %u, ULP_MODE_ISCSI, submode=%#x",
|
|
__func__, toep->tid, ulp_submode);
|
|
|
|
val = V_TCB_ULP_TYPE(ULP_MODE_ISCSI) | V_TCB_ULP_RAW(ulp_submode);
|
|
t4_set_tcb_field(sc, toep->ctrlq, toep, W_TCB_ULP_TYPE,
|
|
V_TCB_ULP_TYPE(M_TCB_ULP_TYPE) | V_TCB_ULP_RAW(M_TCB_ULP_RAW), val,
|
|
0, 0);
|
|
|
|
val = V_TF_RX_FLOW_CONTROL_DISABLE(1ULL);
|
|
t4_set_tcb_field(sc, toep->ctrlq, toep, W_TCB_T_FLAGS, val, val, 0, 0);
|
|
}
|
|
|
|
/*
|
|
* XXXNP: Who is responsible for cleaning up the socket if this returns with an
|
|
* error? Review all error paths.
|
|
*
|
|
* XXXNP: What happens to the socket's fd reference if the operation is
|
|
* successful, and how does that affect the socket's life cycle?
|
|
*/
|
|
int
|
|
icl_cxgbei_conn_handoff(struct icl_conn *ic, int fd)
|
|
{
|
|
struct icl_cxgbei_conn *icc = ic_to_icc(ic);
|
|
struct find_ofld_adapter_rr fa;
|
|
struct file *fp;
|
|
struct socket *so;
|
|
struct inpcb *inp;
|
|
struct tcpcb *tp;
|
|
struct toepcb *toep;
|
|
cap_rights_t rights;
|
|
u_int max_rx_pdu_len, max_tx_pdu_len;
|
|
int error, max_iso_pdus;
|
|
|
|
MPASS(icc->icc_signature == CXGBEI_CONN_SIGNATURE);
|
|
ICL_CONN_LOCK_ASSERT_NOT(ic);
|
|
|
|
/*
|
|
* Steal the socket from userland.
|
|
*/
|
|
error = fget(curthread, fd,
|
|
cap_rights_init_one(&rights, CAP_SOCK_CLIENT), &fp);
|
|
if (error != 0)
|
|
return (error);
|
|
if (fp->f_type != DTYPE_SOCKET) {
|
|
fdrop(fp, curthread);
|
|
return (EINVAL);
|
|
}
|
|
so = fp->f_data;
|
|
if (so->so_type != SOCK_STREAM ||
|
|
so->so_proto->pr_protocol != IPPROTO_TCP) {
|
|
fdrop(fp, curthread);
|
|
return (EINVAL);
|
|
}
|
|
|
|
ICL_CONN_LOCK(ic);
|
|
if (ic->ic_socket != NULL) {
|
|
ICL_CONN_UNLOCK(ic);
|
|
fdrop(fp, curthread);
|
|
return (EBUSY);
|
|
}
|
|
ic->ic_disconnecting = false;
|
|
ic->ic_socket = so;
|
|
fp->f_ops = &badfileops;
|
|
fp->f_data = NULL;
|
|
fdrop(fp, curthread);
|
|
ICL_CONN_UNLOCK(ic);
|
|
|
|
/* Find the adapter offloading this socket. */
|
|
fa.sc = NULL;
|
|
fa.so = so;
|
|
t4_iterate(find_offload_adapter, &fa);
|
|
if (fa.sc == NULL) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
icc->sc = fa.sc;
|
|
|
|
max_rx_pdu_len = ISCSI_BHS_SIZE + ic->ic_max_recv_data_segment_length;
|
|
max_tx_pdu_len = ISCSI_BHS_SIZE + ic->ic_max_send_data_segment_length;
|
|
if (ic->ic_header_crc32c) {
|
|
max_rx_pdu_len += ISCSI_HEADER_DIGEST_SIZE;
|
|
max_tx_pdu_len += ISCSI_HEADER_DIGEST_SIZE;
|
|
}
|
|
if (ic->ic_data_crc32c) {
|
|
max_rx_pdu_len += ISCSI_DATA_DIGEST_SIZE;
|
|
max_tx_pdu_len += ISCSI_DATA_DIGEST_SIZE;
|
|
}
|
|
|
|
inp = sotoinpcb(so);
|
|
INP_WLOCK(inp);
|
|
tp = intotcpcb(inp);
|
|
if (inp->inp_flags & (INP_DROPPED | INP_TIMEWAIT)) {
|
|
INP_WUNLOCK(inp);
|
|
error = ENOTCONN;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* socket could not have been "unoffloaded" if here.
|
|
*/
|
|
MPASS(tp->t_flags & TF_TOE);
|
|
MPASS(tp->tod != NULL);
|
|
MPASS(tp->t_toe != NULL);
|
|
toep = tp->t_toe;
|
|
MPASS(toep->vi->adapter == icc->sc);
|
|
|
|
if (ulp_mode(toep) != ULP_MODE_NONE) {
|
|
INP_WUNLOCK(inp);
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
icc->toep = toep;
|
|
|
|
icc->ulp_submode = 0;
|
|
if (ic->ic_header_crc32c)
|
|
icc->ulp_submode |= ULP_CRC_HEADER;
|
|
if (ic->ic_data_crc32c)
|
|
icc->ulp_submode |= ULP_CRC_DATA;
|
|
|
|
if (icc->sc->tt.iso && chip_id(icc->sc) >= CHELSIO_T5 &&
|
|
!is_memfree(icc->sc)) {
|
|
max_iso_pdus = CXGBEI_MAX_ISO_PAYLOAD / max_tx_pdu_len;
|
|
ic->ic_hw_isomax = max_iso_pdus *
|
|
ic->ic_max_send_data_segment_length;
|
|
} else
|
|
max_iso_pdus = 1;
|
|
|
|
toep->params.ulp_mode = ULP_MODE_ISCSI;
|
|
toep->ulpcb = icc;
|
|
|
|
send_iscsi_flowc_wr(icc->sc, toep,
|
|
roundup(max_iso_pdus * max_tx_pdu_len, tp->t_maxseg));
|
|
set_ulp_mode_iscsi(icc->sc, toep, icc->ulp_submode);
|
|
INP_WUNLOCK(inp);
|
|
|
|
error = kthread_add(icl_cxgbei_tx_main, icc, NULL, &icc->tx_thread, 0,
|
|
0, "%stx (cxgbei)", ic->ic_name);
|
|
if (error != 0)
|
|
goto out;
|
|
|
|
error = kthread_add(icl_cxgbei_rx_main, icc, NULL, &icc->rx_thread, 0,
|
|
0, "%srx (cxgbei)", ic->ic_name);
|
|
if (error != 0)
|
|
goto out;
|
|
|
|
error = icl_cxgbei_setsockopt(ic, so, max_tx_pdu_len, max_rx_pdu_len);
|
|
out:
|
|
if (error != 0)
|
|
icl_cxgbei_conn_close(ic);
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
icl_cxgbei_conn_close(struct icl_conn *ic)
|
|
{
|
|
struct icl_cxgbei_conn *icc = ic_to_icc(ic);
|
|
struct icl_pdu *ip;
|
|
struct socket *so;
|
|
struct sockbuf *sb;
|
|
struct inpcb *inp;
|
|
struct toepcb *toep = icc->toep;
|
|
|
|
MPASS(icc->icc_signature == CXGBEI_CONN_SIGNATURE);
|
|
ICL_CONN_LOCK_ASSERT_NOT(ic);
|
|
|
|
ICL_CONN_LOCK(ic);
|
|
so = ic->ic_socket;
|
|
if (ic->ic_disconnecting || so == NULL) {
|
|
CTR4(KTR_CXGBE, "%s: icc %p (disconnecting = %d), so %p",
|
|
__func__, icc, ic->ic_disconnecting, so);
|
|
ICL_CONN_UNLOCK(ic);
|
|
return;
|
|
}
|
|
ic->ic_disconnecting = true;
|
|
|
|
#ifdef DIAGNOSTIC
|
|
KASSERT(ic->ic_outstanding_pdus == 0,
|
|
("destroying session with %d outstanding PDUs",
|
|
ic->ic_outstanding_pdus));
|
|
#endif
|
|
|
|
CTR3(KTR_CXGBE, "%s: tid %d, icc %p", __func__, toep ? toep->tid : -1,
|
|
icc);
|
|
|
|
/*
|
|
* Wait for the transmit thread to stop processing
|
|
* this connection.
|
|
*/
|
|
if (icc->tx_thread != NULL) {
|
|
wakeup(&icc->tx_active);
|
|
mtx_sleep(icc->tx_thread, ic->ic_lock, 0, "conclo", 0);
|
|
}
|
|
|
|
/* Discard PDUs queued for TX. */
|
|
while (!STAILQ_EMPTY(&icc->sent_pdus)) {
|
|
ip = STAILQ_FIRST(&icc->sent_pdus);
|
|
STAILQ_REMOVE_HEAD(&icc->sent_pdus, ip_next);
|
|
icl_cxgbei_pdu_done(ip, ENOTCONN);
|
|
}
|
|
ICL_CONN_UNLOCK(ic);
|
|
|
|
inp = sotoinpcb(so);
|
|
sb = &so->so_rcv;
|
|
|
|
/*
|
|
* Wait for the receive thread to stop processing this
|
|
* connection.
|
|
*/
|
|
SOCKBUF_LOCK(sb);
|
|
if (icc->rx_thread != NULL) {
|
|
icc->rx_exiting = true;
|
|
wakeup(&icc->rx_active);
|
|
mtx_sleep(icc->rx_thread, SOCKBUF_MTX(sb), 0, "conclo", 0);
|
|
}
|
|
|
|
/*
|
|
* Discard received PDUs not passed to the iSCSI layer.
|
|
*/
|
|
while (!STAILQ_EMPTY(&icc->rcvd_pdus)) {
|
|
ip = STAILQ_FIRST(&icc->rcvd_pdus);
|
|
STAILQ_REMOVE_HEAD(&icc->rcvd_pdus, ip_next);
|
|
icl_cxgbei_pdu_done(ip, ENOTCONN);
|
|
}
|
|
SOCKBUF_UNLOCK(sb);
|
|
|
|
INP_WLOCK(inp);
|
|
if (toep != NULL) { /* NULL if connection was never offloaded. */
|
|
toep->ulpcb = NULL;
|
|
|
|
/* Discard mbufs queued for TX. */
|
|
mbufq_drain(&toep->ulp_pduq);
|
|
|
|
/*
|
|
* Grab a reference to use when waiting for the final
|
|
* CPL to be received. If toep->inp is NULL, then
|
|
* final_cpl_received() has already been called (e.g.
|
|
* due to the peer sending a RST).
|
|
*/
|
|
if (toep->inp != NULL) {
|
|
toep = hold_toepcb(toep);
|
|
toep->flags |= TPF_WAITING_FOR_FINAL;
|
|
} else
|
|
toep = NULL;
|
|
}
|
|
INP_WUNLOCK(inp);
|
|
|
|
ICL_CONN_LOCK(ic);
|
|
ic->ic_socket = NULL;
|
|
ICL_CONN_UNLOCK(ic);
|
|
|
|
/*
|
|
* XXXNP: we should send RST instead of FIN when PDUs held in various
|
|
* queues were purged instead of delivered reliably but soabort isn't
|
|
* really general purpose and wouldn't do the right thing here.
|
|
*/
|
|
soclose(so);
|
|
|
|
/*
|
|
* Wait for the socket to fully close. This ensures any
|
|
* pending received data has been received (and in particular,
|
|
* any data that would be received by DDP has been handled).
|
|
* Callers assume that it is safe to free buffers for tasks
|
|
* and transfers after this function returns.
|
|
*/
|
|
if (toep != NULL) {
|
|
struct mtx *lock = mtx_pool_find(mtxpool_sleep, toep);
|
|
|
|
mtx_lock(lock);
|
|
while ((toep->flags & TPF_WAITING_FOR_FINAL) != 0)
|
|
mtx_sleep(toep, lock, PSOCK, "conclo2", 0);
|
|
mtx_unlock(lock);
|
|
free_toepcb(toep);
|
|
}
|
|
}
|
|
|
|
static void
|
|
cxgbei_insert_cmp(struct icl_cxgbei_conn *icc, struct cxgbei_cmp *cmp,
|
|
uint32_t tt)
|
|
{
|
|
#ifdef INVARIANTS
|
|
struct cxgbei_cmp *cmp2;
|
|
#endif
|
|
|
|
cmp->tt = tt;
|
|
|
|
mtx_lock(&icc->cmp_lock);
|
|
#ifdef INVARIANTS
|
|
LIST_FOREACH(cmp2, &icc->cmp_table[TT_HASH(icc, tt)], link) {
|
|
KASSERT(cmp2->tt != tt, ("%s: duplicate cmp", __func__));
|
|
}
|
|
#endif
|
|
LIST_INSERT_HEAD(&icc->cmp_table[TT_HASH(icc, tt)], cmp, link);
|
|
mtx_unlock(&icc->cmp_lock);
|
|
}
|
|
|
|
struct cxgbei_cmp *
|
|
cxgbei_find_cmp(struct icl_cxgbei_conn *icc, uint32_t tt)
|
|
{
|
|
struct cxgbei_cmp *cmp;
|
|
|
|
mtx_lock(&icc->cmp_lock);
|
|
LIST_FOREACH(cmp, &icc->cmp_table[TT_HASH(icc, tt)], link) {
|
|
if (cmp->tt == tt)
|
|
break;
|
|
}
|
|
mtx_unlock(&icc->cmp_lock);
|
|
return (cmp);
|
|
}
|
|
|
|
static void
|
|
cxgbei_rm_cmp(struct icl_cxgbei_conn *icc, struct cxgbei_cmp *cmp)
|
|
{
|
|
#ifdef INVARIANTS
|
|
struct cxgbei_cmp *cmp2;
|
|
#endif
|
|
|
|
mtx_lock(&icc->cmp_lock);
|
|
|
|
#ifdef INVARIANTS
|
|
LIST_FOREACH(cmp2, &icc->cmp_table[TT_HASH(icc, cmp->tt)], link) {
|
|
if (cmp2 == cmp)
|
|
goto found;
|
|
}
|
|
panic("%s: could not find cmp", __func__);
|
|
found:
|
|
#endif
|
|
LIST_REMOVE(cmp, link);
|
|
mtx_unlock(&icc->cmp_lock);
|
|
}
|
|
|
|
int
|
|
icl_cxgbei_conn_task_setup(struct icl_conn *ic, struct icl_pdu *ip,
|
|
struct ccb_scsiio *csio, uint32_t *ittp, void **arg)
|
|
{
|
|
struct icl_cxgbei_conn *icc = ic_to_icc(ic);
|
|
struct toepcb *toep = icc->toep;
|
|
struct adapter *sc = icc->sc;
|
|
struct cxgbei_data *ci = sc->iscsi_ulp_softc;
|
|
struct ppod_region *pr = &ci->pr;
|
|
struct cxgbei_ddp_state *ddp;
|
|
struct ppod_reservation *prsv;
|
|
struct inpcb *inp;
|
|
struct mbufq mq;
|
|
uint32_t itt;
|
|
int rc = 0;
|
|
|
|
ICL_CONN_LOCK_ASSERT(ic);
|
|
|
|
/* This is for the offload driver's state. Must not be set already. */
|
|
MPASS(arg != NULL);
|
|
MPASS(*arg == NULL);
|
|
|
|
if ((csio->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_IN ||
|
|
csio->dxfer_len < ci->ddp_threshold || ic->ic_disconnecting ||
|
|
ic->ic_socket == NULL) {
|
|
no_ddp:
|
|
/*
|
|
* No DDP for this I/O. Allocate an ITT (based on the one
|
|
* passed in) that cannot be a valid hardware DDP tag in the
|
|
* iSCSI region.
|
|
*/
|
|
itt = *ittp & M_PPOD_TAG;
|
|
itt = V_PPOD_TAG(itt) | pr->pr_invalid_bit;
|
|
*ittp = htobe32(itt);
|
|
MPASS(*arg == NULL); /* State is maintained for DDP only. */
|
|
if (rc != 0)
|
|
counter_u64_add(
|
|
toep->ofld_rxq->rx_iscsi_ddp_setup_error, 1);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Reserve resources for DDP, update the itt that should be used in the
|
|
* PDU, and save DDP specific state for this I/O in *arg.
|
|
*/
|
|
ddp = malloc(sizeof(*ddp), M_CXGBEI, M_NOWAIT | M_ZERO);
|
|
if (ddp == NULL) {
|
|
rc = ENOMEM;
|
|
goto no_ddp;
|
|
}
|
|
prsv = &ddp->prsv;
|
|
|
|
mbufq_init(&mq, INT_MAX);
|
|
switch (csio->ccb_h.flags & CAM_DATA_MASK) {
|
|
case CAM_DATA_BIO:
|
|
rc = t4_alloc_page_pods_for_bio(pr,
|
|
(struct bio *)csio->data_ptr, prsv);
|
|
if (rc != 0) {
|
|
free(ddp, M_CXGBEI);
|
|
goto no_ddp;
|
|
}
|
|
|
|
rc = t4_write_page_pods_for_bio(sc, toep, prsv,
|
|
(struct bio *)csio->data_ptr, &mq);
|
|
if (__predict_false(rc != 0)) {
|
|
mbufq_drain(&mq);
|
|
t4_free_page_pods(prsv);
|
|
free(ddp, M_CXGBEI);
|
|
goto no_ddp;
|
|
}
|
|
break;
|
|
case CAM_DATA_VADDR:
|
|
rc = t4_alloc_page_pods_for_buf(pr, (vm_offset_t)csio->data_ptr,
|
|
csio->dxfer_len, prsv);
|
|
if (rc != 0) {
|
|
free(ddp, M_CXGBEI);
|
|
goto no_ddp;
|
|
}
|
|
|
|
rc = t4_write_page_pods_for_buf(sc, toep, prsv,
|
|
(vm_offset_t)csio->data_ptr, csio->dxfer_len, &mq);
|
|
if (__predict_false(rc != 0)) {
|
|
mbufq_drain(&mq);
|
|
t4_free_page_pods(prsv);
|
|
free(ddp, M_CXGBEI);
|
|
goto no_ddp;
|
|
}
|
|
break;
|
|
default:
|
|
free(ddp, M_CXGBEI);
|
|
rc = EINVAL;
|
|
goto no_ddp;
|
|
}
|
|
|
|
/*
|
|
* Do not get inp from toep->inp as the toepcb might have
|
|
* detached already.
|
|
*/
|
|
inp = sotoinpcb(ic->ic_socket);
|
|
INP_WLOCK(inp);
|
|
if ((inp->inp_flags & (INP_DROPPED | INP_TIMEWAIT)) != 0) {
|
|
INP_WUNLOCK(inp);
|
|
mbufq_drain(&mq);
|
|
t4_free_page_pods(prsv);
|
|
free(ddp, M_CXGBEI);
|
|
goto no_ddp;
|
|
}
|
|
mbufq_concat(&toep->ulp_pduq, &mq);
|
|
INP_WUNLOCK(inp);
|
|
|
|
ddp->cmp.last_datasn = -1;
|
|
cxgbei_insert_cmp(icc, &ddp->cmp, prsv->prsv_tag);
|
|
*ittp = htobe32(prsv->prsv_tag);
|
|
*arg = prsv;
|
|
counter_u64_add(toep->ofld_rxq->rx_iscsi_ddp_setup_ok, 1);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
icl_cxgbei_conn_task_done(struct icl_conn *ic, void *arg)
|
|
{
|
|
|
|
if (arg != NULL) {
|
|
struct cxgbei_ddp_state *ddp = arg;
|
|
|
|
cxgbei_rm_cmp(ic_to_icc(ic), &ddp->cmp);
|
|
t4_free_page_pods(&ddp->prsv);
|
|
free(ddp, M_CXGBEI);
|
|
}
|
|
}
|
|
|
|
static inline bool
|
|
ddp_sgl_check(struct ctl_sg_entry *sg, int entries, int xferlen)
|
|
{
|
|
#ifdef INVARIANTS
|
|
int total_len = 0;
|
|
#endif
|
|
|
|
MPASS(entries > 0);
|
|
if (((vm_offset_t)sg[--entries].addr & 3U) != 0)
|
|
return (false);
|
|
|
|
#ifdef INVARIANTS
|
|
total_len += sg[entries].len;
|
|
#endif
|
|
|
|
while (--entries >= 0) {
|
|
if (((vm_offset_t)sg[entries].addr & PAGE_MASK) != 0 ||
|
|
(sg[entries].len % PAGE_SIZE) != 0)
|
|
return (false);
|
|
#ifdef INVARIANTS
|
|
total_len += sg[entries].len;
|
|
#endif
|
|
}
|
|
|
|
MPASS(total_len == xferlen);
|
|
return (true);
|
|
}
|
|
|
|
#define io_to_ddp_state(io) ((io)->io_hdr.ctl_private[CTL_PRIV_FRONTEND2].ptr)
|
|
|
|
int
|
|
icl_cxgbei_conn_transfer_setup(struct icl_conn *ic, struct icl_pdu *ip,
|
|
union ctl_io *io, uint32_t *tttp, void **arg)
|
|
{
|
|
struct icl_cxgbei_conn *icc = ic_to_icc(ic);
|
|
struct toepcb *toep = icc->toep;
|
|
struct ctl_scsiio *ctsio = &io->scsiio;
|
|
struct adapter *sc = icc->sc;
|
|
struct cxgbei_data *ci = sc->iscsi_ulp_softc;
|
|
struct ppod_region *pr = &ci->pr;
|
|
struct cxgbei_ddp_state *ddp;
|
|
struct ppod_reservation *prsv;
|
|
struct ctl_sg_entry *sgl, sg_entry;
|
|
struct inpcb *inp;
|
|
struct mbufq mq;
|
|
int sg_entries = ctsio->kern_sg_entries;
|
|
uint32_t ttt;
|
|
int xferlen, rc = 0, alias;
|
|
|
|
/* This is for the offload driver's state. Must not be set already. */
|
|
MPASS(arg != NULL);
|
|
MPASS(*arg == NULL);
|
|
|
|
if (ctsio->ext_data_filled == 0) {
|
|
int first_burst;
|
|
#ifdef INVARIANTS
|
|
struct icl_cxgbei_pdu *icp = ip_to_icp(ip);
|
|
|
|
MPASS(icp->icp_signature == CXGBEI_PDU_SIGNATURE);
|
|
MPASS(ic == ip->ip_conn);
|
|
MPASS(ip->ip_bhs_mbuf != NULL);
|
|
#endif
|
|
first_burst = icl_pdu_data_segment_length(ip);
|
|
|
|
/*
|
|
* Note that ICL calls conn_transfer_setup even if the first
|
|
* burst had everything and there's nothing left to transfer.
|
|
*
|
|
* NB: The CTL frontend might have provided a buffer
|
|
* whose length (kern_data_len) is smaller than the
|
|
* FirstBurstLength of unsolicited data. Treat those
|
|
* as an empty transfer.
|
|
*/
|
|
xferlen = ctsio->kern_data_len;
|
|
if (xferlen < first_burst ||
|
|
xferlen - first_burst < ci->ddp_threshold) {
|
|
no_ddp:
|
|
/*
|
|
* No DDP for this transfer. Allocate a TTT (based on
|
|
* the one passed in) that cannot be a valid hardware
|
|
* DDP tag in the iSCSI region.
|
|
*/
|
|
ttt = *tttp & M_PPOD_TAG;
|
|
ttt = V_PPOD_TAG(ttt) | pr->pr_invalid_bit;
|
|
*tttp = htobe32(ttt);
|
|
MPASS(io_to_ddp_state(io) == NULL);
|
|
if (rc != 0)
|
|
counter_u64_add(
|
|
toep->ofld_rxq->rx_iscsi_ddp_setup_error, 1);
|
|
return (0);
|
|
}
|
|
|
|
if (sg_entries == 0) {
|
|
sgl = &sg_entry;
|
|
sgl->len = xferlen;
|
|
sgl->addr = (void *)ctsio->kern_data_ptr;
|
|
sg_entries = 1;
|
|
} else
|
|
sgl = (void *)ctsio->kern_data_ptr;
|
|
|
|
if (!ddp_sgl_check(sgl, sg_entries, xferlen))
|
|
goto no_ddp;
|
|
|
|
/*
|
|
* Reserve resources for DDP, update the ttt that should be used
|
|
* in the PDU, and save DDP specific state for this I/O.
|
|
*/
|
|
MPASS(io_to_ddp_state(io) == NULL);
|
|
ddp = malloc(sizeof(*ddp), M_CXGBEI, M_NOWAIT | M_ZERO);
|
|
if (ddp == NULL) {
|
|
rc = ENOMEM;
|
|
goto no_ddp;
|
|
}
|
|
prsv = &ddp->prsv;
|
|
|
|
rc = t4_alloc_page_pods_for_sgl(pr, sgl, sg_entries, prsv);
|
|
if (rc != 0) {
|
|
free(ddp, M_CXGBEI);
|
|
goto no_ddp;
|
|
}
|
|
|
|
mbufq_init(&mq, INT_MAX);
|
|
rc = t4_write_page_pods_for_sgl(sc, toep, prsv, sgl, sg_entries,
|
|
xferlen, &mq);
|
|
if (__predict_false(rc != 0)) {
|
|
mbufq_drain(&mq);
|
|
t4_free_page_pods(prsv);
|
|
free(ddp, M_CXGBEI);
|
|
goto no_ddp;
|
|
}
|
|
|
|
/*
|
|
* Do not get inp from toep->inp as the toepcb might
|
|
* have detached already.
|
|
*/
|
|
ICL_CONN_LOCK(ic);
|
|
if (ic->ic_disconnecting || ic->ic_socket == NULL) {
|
|
ICL_CONN_UNLOCK(ic);
|
|
mbufq_drain(&mq);
|
|
t4_free_page_pods(prsv);
|
|
free(ddp, M_CXGBEI);
|
|
return (ECONNRESET);
|
|
}
|
|
inp = sotoinpcb(ic->ic_socket);
|
|
INP_WLOCK(inp);
|
|
ICL_CONN_UNLOCK(ic);
|
|
if ((inp->inp_flags & (INP_DROPPED | INP_TIMEWAIT)) != 0) {
|
|
INP_WUNLOCK(inp);
|
|
mbufq_drain(&mq);
|
|
t4_free_page_pods(prsv);
|
|
free(ddp, M_CXGBEI);
|
|
return (ECONNRESET);
|
|
}
|
|
mbufq_concat(&toep->ulp_pduq, &mq);
|
|
INP_WUNLOCK(inp);
|
|
|
|
ddp->cmp.next_buffer_offset = ctsio->kern_rel_offset +
|
|
first_burst;
|
|
ddp->cmp.last_datasn = -1;
|
|
cxgbei_insert_cmp(icc, &ddp->cmp, prsv->prsv_tag);
|
|
*tttp = htobe32(prsv->prsv_tag);
|
|
io_to_ddp_state(io) = ddp;
|
|
*arg = ctsio;
|
|
counter_u64_add(toep->ofld_rxq->rx_iscsi_ddp_setup_ok, 1);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* In the middle of an I/O. A non-NULL page pod reservation indicates
|
|
* that a DDP buffer is being used for the I/O.
|
|
*/
|
|
ddp = io_to_ddp_state(ctsio);
|
|
if (ddp == NULL)
|
|
goto no_ddp;
|
|
prsv = &ddp->prsv;
|
|
|
|
alias = (prsv->prsv_tag & pr->pr_alias_mask) >> pr->pr_alias_shift;
|
|
alias++;
|
|
prsv->prsv_tag &= ~pr->pr_alias_mask;
|
|
prsv->prsv_tag |= alias << pr->pr_alias_shift & pr->pr_alias_mask;
|
|
|
|
ddp->cmp.last_datasn = -1;
|
|
cxgbei_insert_cmp(icc, &ddp->cmp, prsv->prsv_tag);
|
|
*tttp = htobe32(prsv->prsv_tag);
|
|
*arg = ctsio;
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
icl_cxgbei_conn_transfer_done(struct icl_conn *ic, void *arg)
|
|
{
|
|
struct ctl_scsiio *ctsio = arg;
|
|
|
|
if (ctsio != NULL) {
|
|
struct cxgbei_ddp_state *ddp;
|
|
|
|
ddp = io_to_ddp_state(ctsio);
|
|
MPASS(ddp != NULL);
|
|
|
|
cxgbei_rm_cmp(ic_to_icc(ic), &ddp->cmp);
|
|
if (ctsio->kern_data_len == ctsio->ext_data_filled ||
|
|
ic->ic_disconnecting) {
|
|
t4_free_page_pods(&ddp->prsv);
|
|
free(ddp, M_CXGBEI);
|
|
io_to_ddp_state(ctsio) = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
cxgbei_limits(struct adapter *sc, void *arg)
|
|
{
|
|
struct icl_drv_limits *idl = arg;
|
|
struct cxgbei_data *ci;
|
|
int max_dsl;
|
|
|
|
if (begin_synchronized_op(sc, NULL, HOLD_LOCK, "t4lims") != 0)
|
|
return;
|
|
|
|
if (uld_active(sc, ULD_ISCSI)) {
|
|
ci = sc->iscsi_ulp_softc;
|
|
MPASS(ci != NULL);
|
|
|
|
|
|
max_dsl = ci->max_rx_data_len;
|
|
if (idl->idl_max_recv_data_segment_length > max_dsl)
|
|
idl->idl_max_recv_data_segment_length = max_dsl;
|
|
|
|
max_dsl = ci->max_tx_data_len;
|
|
if (idl->idl_max_send_data_segment_length > max_dsl)
|
|
idl->idl_max_send_data_segment_length = max_dsl;
|
|
}
|
|
|
|
end_synchronized_op(sc, LOCK_HELD);
|
|
}
|
|
|
|
static int
|
|
icl_cxgbei_limits(struct icl_drv_limits *idl)
|
|
{
|
|
|
|
/* Maximum allowed by the RFC. cxgbei_limits will clip them. */
|
|
idl->idl_max_recv_data_segment_length = (1 << 24) - 1;
|
|
idl->idl_max_send_data_segment_length = (1 << 24) - 1;
|
|
|
|
/* These are somewhat arbitrary. */
|
|
idl->idl_max_burst_length = max_burst_length;
|
|
idl->idl_first_burst_length = first_burst_length;
|
|
|
|
t4_iterate(cxgbei_limits, idl);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
icl_cxgbei_mod_load(void)
|
|
{
|
|
int rc;
|
|
|
|
refcount_init(&icl_cxgbei_ncons, 0);
|
|
|
|
rc = icl_register("cxgbei", false, -100, icl_cxgbei_limits,
|
|
icl_cxgbei_new_conn);
|
|
|
|
return (rc);
|
|
}
|
|
|
|
int
|
|
icl_cxgbei_mod_unload(void)
|
|
{
|
|
|
|
if (icl_cxgbei_ncons != 0)
|
|
return (EBUSY);
|
|
|
|
icl_unregister("cxgbei", false);
|
|
|
|
return (0);
|
|
}
|
|
#endif
|