595 lines
14 KiB
C
595 lines
14 KiB
C
/**************************************************************************
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Copyright (c) 2007, Chelsio Inc.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Neither the name of the Chelsio Corporation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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***************************************************************************/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/module.h>
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#include <sys/pciio.h>
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#include <sys/conf.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/bus_dma.h>
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#include <sys/kthread.h>
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#include <sys/rman.h>
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#include <sys/ioccom.h>
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#include <sys/mbuf.h>
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#include <sys/linker.h>
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#include <sys/firmware.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/proc.h>
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#include <sys/sched.h>
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#include <sys/smp.h>
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#include <sys/sysctl.h>
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#include <sys/queue.h>
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#include <sys/taskqueue.h>
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#include <sys/unistd.h>
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#include <sys/syslog.h>
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#include <net/bpf.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/if_arp.h>
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#include <net/if_dl.h>
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#include <net/if_media.h>
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#include <net/if_types.h>
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#include <netinet/in_systm.h>
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#include <netinet/in.h>
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#include <netinet/if_ether.h>
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#include <netinet/ip.h>
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#include <netinet/ip6.h>
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#include <netinet/sctp_crc32.h>
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#include <netinet/sctp.h>
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#include <netinet/tcp.h>
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#include <netinet/udp.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pci_private.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <cxgb_include.h>
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#include <sys/mvec.h>
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extern int txq_fills;
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int multiq_tx_enable = 1;
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int coalesce_tx_enable = 1;
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int wakeup_tx_thread = 0;
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extern struct sysctl_oid_list sysctl__hw_cxgb_children;
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static int sleep_ticks = 1;
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TUNABLE_INT("hw.cxgb.sleep_ticks", &sleep_ticks);
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SYSCTL_UINT(_hw_cxgb, OID_AUTO, sleep_ticks, CTLFLAG_RDTUN, &sleep_ticks, 0,
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"ticks to sleep between checking pcpu queues");
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int cxgb_txq_buf_ring_size = TX_ETH_Q_SIZE;
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TUNABLE_INT("hw.cxgb.txq_mr_size", &cxgb_txq_buf_ring_size);
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SYSCTL_UINT(_hw_cxgb, OID_AUTO, txq_mr_size, CTLFLAG_RDTUN, &cxgb_txq_buf_ring_size, 0,
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"size of per-queue mbuf ring");
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static void cxgb_pcpu_start_proc(void *arg);
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static int cxgb_tx(struct sge_qset *qs, uint32_t txmax);
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#ifdef IFNET_MULTIQUEUE
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static int cxgb_pcpu_cookie_to_qidx(struct port_info *pi, uint32_t cookie);
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#endif
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static inline int
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cxgb_pcpu_enqueue_packet_(struct sge_qset *qs, struct mbuf *m)
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{
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struct sge_txq *txq;
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int err = 0;
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KASSERT(m != NULL, ("null mbuf"));
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KASSERT(m->m_type == MT_DATA, ("bad mbuf type %d", m->m_type));
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if (qs->qs_flags & QS_EXITING) {
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m_freem(m);
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return (ENETDOWN);
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}
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txq = &qs->txq[TXQ_ETH];
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err = drbr_enqueue(qs->port->ifp, txq->txq_mr, m);
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if (err) {
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txq->txq_drops++;
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m_freem(m);
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}
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if (wakeup_tx_thread && !err &&
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((txq->flags & TXQ_TRANSMITTING) == 0))
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wakeup(qs);
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return (err);
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}
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static int
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cxgb_dequeue_packet(struct sge_txq *txq, struct mbuf **m_vec)
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{
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struct mbuf *m, *m0;
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struct sge_qset *qs;
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int count, size, coalesced;
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struct adapter *sc;
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#ifdef ALTQ
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if (ALTQ_IS_ENABLED(txq->txq_ifq)) {
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IFQ_DRV_DEQUEUE(txq->txq_ifq, m);
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if (m == NULL)
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return (0);
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m_vec[0] = m;
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return (1);
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}
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#endif
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mtx_assert(&txq->lock, MA_OWNED);
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coalesced = count = size = 0;
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qs = txq_to_qset(txq, TXQ_ETH);
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if (qs->qs_flags & QS_EXITING)
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return (0);
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if (txq->immpkt != NULL) {
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m_vec[0] = txq->immpkt;
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txq->immpkt = NULL;
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return (1);
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}
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sc = qs->port->adapter;
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m = buf_ring_dequeue_sc(txq->txq_mr);
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if (m == NULL)
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return (0);
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count = 1;
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m_vec[0] = m;
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if (m->m_pkthdr.tso_segsz > 0 ||
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m->m_pkthdr.len > TX_WR_SIZE_MAX ||
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m->m_next != NULL ||
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(coalesce_tx_enable == 0)) {
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return (count);
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}
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size = m->m_pkthdr.len;
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for (m = buf_ring_peek(txq->txq_mr); m != NULL;
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m = buf_ring_peek(txq->txq_mr)) {
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if (m->m_pkthdr.tso_segsz > 0
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|| size + m->m_pkthdr.len > TX_WR_SIZE_MAX
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|| m->m_next != NULL)
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break;
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m0 = buf_ring_dequeue_sc(txq->txq_mr);
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#ifdef DEBUG_BUFRING
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if (m0 != m)
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panic("peek and dequeue don't match");
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#endif
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size += m->m_pkthdr.len;
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m_vec[count++] = m;
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if (count == TX_WR_COUNT_MAX)
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break;
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coalesced++;
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}
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txq->txq_coalesced += coalesced;
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return (count);
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}
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static void
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cxgb_pcpu_free(struct sge_qset *qs)
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{
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struct mbuf *m;
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struct sge_txq *txq = &qs->txq[TXQ_ETH];
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mtx_lock(&txq->lock);
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while ((m = mbufq_dequeue(&txq->sendq)) != NULL)
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m_freem(m);
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while ((m = buf_ring_dequeue_sc(txq->txq_mr)) != NULL)
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m_freem(m);
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t3_free_tx_desc_all(txq);
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mtx_unlock(&txq->lock);
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}
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static int
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cxgb_pcpu_reclaim_tx(struct sge_txq *txq)
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{
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int reclaimable;
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struct sge_qset *qs = txq_to_qset(txq, TXQ_ETH);
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mtx_assert(&txq->lock, MA_OWNED);
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reclaimable = desc_reclaimable(txq);
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if (reclaimable == 0)
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return (0);
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t3_free_tx_desc(txq, reclaimable);
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txq->cleaned += reclaimable;
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txq->in_use -= reclaimable;
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if (isset(&qs->txq_stopped, TXQ_ETH)) {
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qs->port->ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
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clrbit(&qs->txq_stopped, TXQ_ETH);
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}
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return (reclaimable);
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}
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static int
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cxgb_pcpu_start_(struct sge_qset *qs, struct mbuf *immpkt, int tx_flush)
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{
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int i, err, initerr, flush, reclaimed, stopped;
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struct port_info *pi;
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struct sge_txq *txq;
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adapter_t *sc;
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uint32_t max_desc;
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pi = qs->port;
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initerr = err = i = reclaimed = 0;
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sc = pi->adapter;
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txq = &qs->txq[TXQ_ETH];
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mtx_assert(&txq->lock, MA_OWNED);
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retry:
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if (!pi->link_config.link_ok)
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initerr = ENETDOWN;
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else if (qs->qs_flags & QS_EXITING)
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initerr = ENETDOWN;
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else if ((pi->ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
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initerr = ENETDOWN;
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else if ((pi->ifp->if_flags & IFF_UP) == 0)
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initerr = ENETDOWN;
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else if (immpkt) {
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if (!buf_ring_empty(txq->txq_mr)
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|| ALTQ_IS_ENABLED(&pi->ifp->if_snd))
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initerr = cxgb_pcpu_enqueue_packet_(qs, immpkt);
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else
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txq->immpkt = immpkt;
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immpkt = NULL;
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}
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if (initerr) {
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if (immpkt)
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m_freem(immpkt);
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if (initerr == ENOBUFS && !tx_flush)
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wakeup(qs);
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return (initerr);
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}
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if ((tx_flush && (desc_reclaimable(txq) > 0)) ||
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(desc_reclaimable(txq) > (TX_ETH_Q_SIZE>>3))) {
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cxgb_pcpu_reclaim_tx(txq);
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}
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stopped = isset(&qs->txq_stopped, TXQ_ETH);
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flush = ((!drbr_empty(pi->ifp, txq->txq_mr)
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&& !stopped) || txq->immpkt);
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max_desc = tx_flush ? TX_ETH_Q_SIZE : TX_START_MAX_DESC;
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err = flush ? cxgb_tx(qs, max_desc) : 0;
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if ((tx_flush && flush && err == 0) &&
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!drbr_empty(pi->ifp, txq->txq_mr)) {
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struct thread *td = curthread;
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if (++i > 1) {
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thread_lock(td);
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sched_prio(td, PRI_MIN_TIMESHARE);
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thread_unlock(td);
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}
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if (i > 200) {
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device_printf(qs->port->adapter->dev,
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"exceeded max enqueue tries\n");
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return (EBUSY);
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}
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goto retry;
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}
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return (err);
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}
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int
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cxgb_pcpu_transmit(struct ifnet *ifp, struct mbuf *immpkt)
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{
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uint32_t cookie;
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int err, qidx, locked, resid;
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struct port_info *pi;
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struct sge_qset *qs;
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struct sge_txq *txq = NULL /* gcc is dumb */;
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struct adapter *sc;
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pi = ifp->if_softc;
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sc = pi->adapter;
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qs = NULL;
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qidx = resid = err = cookie = locked = 0;
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#ifdef IFNET_MULTIQUEUE
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if (immpkt && (immpkt->m_pkthdr.flowid != 0)) {
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cookie = immpkt->m_pkthdr.flowid;
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qidx = cxgb_pcpu_cookie_to_qidx(pi, cookie);
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qs = &pi->adapter->sge.qs[qidx];
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} else
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#endif
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qs = &pi->adapter->sge.qs[pi->first_qset];
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txq = &qs->txq[TXQ_ETH];
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if (((sc->tunq_coalesce == 0) ||
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(buf_ring_count(txq->txq_mr) >= TX_WR_COUNT_MAX) ||
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(coalesce_tx_enable == 0)) && mtx_trylock(&txq->lock)) {
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txq->flags |= TXQ_TRANSMITTING;
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err = cxgb_pcpu_start_(qs, immpkt, FALSE);
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txq->flags &= ~TXQ_TRANSMITTING;
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mtx_unlock(&txq->lock);
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} else if (immpkt)
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return (cxgb_pcpu_enqueue_packet_(qs, immpkt));
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return ((err == EBUSY) ? 0 : err);
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}
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void
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cxgb_start(struct ifnet *ifp)
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{
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struct port_info *p = ifp->if_softc;
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if (!p->link_config.link_ok)
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return;
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cxgb_pcpu_transmit(ifp, NULL);
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}
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static void
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cxgb_pcpu_start_proc(void *arg)
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{
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struct sge_qset *qs = arg;
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struct thread *td;
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struct sge_txq *txq = &qs->txq[TXQ_ETH];
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int idleticks, err = 0;
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td = curthread;
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sleep_ticks = max(hz/1000, 1);
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qs->qs_flags |= QS_RUNNING;
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thread_lock(td);
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sched_bind(td, qs->qs_cpuid);
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thread_unlock(td);
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DELAY(qs->qs_cpuid*100000);
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if (bootverbose)
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printf("bound to %d running on %d\n", qs->qs_cpuid, curcpu);
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for (;;) {
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if (qs->qs_flags & QS_EXITING)
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break;
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if ((qs->port->ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
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idleticks = hz;
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if (!buf_ring_empty(txq->txq_mr) ||
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!mbufq_empty(&txq->sendq))
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cxgb_pcpu_free(qs);
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goto done;
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} else
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idleticks = sleep_ticks;
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if (mtx_trylock(&txq->lock)) {
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txq->flags |= TXQ_TRANSMITTING;
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err = cxgb_pcpu_start_(qs, NULL, TRUE);
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txq->flags &= ~TXQ_TRANSMITTING;
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mtx_unlock(&txq->lock);
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} else
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err = EINPROGRESS;
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#ifdef notyet
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if (mtx_trylock(&qs->rspq.lock)) {
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process_responses(sc, qs, -1);
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refill_fl_service(sc, &qs->fl[0]);
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refill_fl_service(sc, &qs->fl[1]);
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t3_write_reg(sc, A_SG_GTS, V_RSPQ(qs->rspq.cntxt_id) |
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V_NEWTIMER(qs->rspq.next_holdoff) | V_NEWINDEX(qs->rspq.cidx));
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mtx_unlock(&qs->rspq.lock);
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}
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#endif
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if ((!buf_ring_empty(txq->txq_mr)) && err == 0) {
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#if 0
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if (cxgb_debug)
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printf("head=%p cons=%d prod=%d\n",
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txq->sendq.head, txq->txq_mr.br_cons,
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txq->txq_mr.br_prod);
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#endif
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continue;
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}
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done:
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tsleep(qs, 1, "cxgbidle", idleticks);
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}
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if (bootverbose)
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device_printf(qs->port->adapter->dev, "exiting thread for cpu%d\n", qs->qs_cpuid);
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cxgb_pcpu_free(qs);
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t3_free_qset(qs->port->adapter, qs);
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qs->qs_flags &= ~QS_RUNNING;
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#if __FreeBSD_version >= 800002
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kproc_exit(0);
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#else
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kthread_exit(0);
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#endif
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}
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#ifdef IFNET_MULTIQUEUE
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static int
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cxgb_pcpu_cookie_to_qidx(struct port_info *pi, uint32_t cookie)
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{
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int qidx;
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uint32_t tmp;
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if (multiq_tx_enable == 0)
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return (pi->first_qset);
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/*
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* Will probably need to be changed for 4-port XXX
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*/
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tmp = pi->tx_chan ? cookie : cookie & ((RSS_TABLE_SIZE>>1)-1);
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DPRINTF(" tmp=%d ", tmp);
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qidx = (tmp & (pi->nqsets -1)) + pi->first_qset;
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return (qidx);
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}
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#endif
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void
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cxgb_pcpu_startup_threads(struct adapter *sc)
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{
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int i, j, nqsets;
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struct proc *p;
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for (i = 0; i < (sc)->params.nports; ++i) {
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struct port_info *pi = adap2pinfo(sc, i);
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#ifdef IFNET_MULTIQUEUE
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nqsets = pi->nqsets;
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#else
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nqsets = 1;
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#endif
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for (j = 0; j < nqsets; ++j) {
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struct sge_qset *qs;
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qs = &sc->sge.qs[pi->first_qset + j];
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qs->port = pi;
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qs->qs_cpuid = ((pi->first_qset + j) % mp_ncpus);
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device_printf(sc->dev, "starting thread for %d\n",
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qs->qs_cpuid);
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#if __FreeBSD_version >= 800002
|
|
kproc_create(cxgb_pcpu_start_proc, qs, &p,
|
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RFNOWAIT, 0, "cxgbsp");
|
|
#else
|
|
kthread_create(cxgb_pcpu_start_proc, qs, &p,
|
|
RFNOWAIT, 0, "cxgbsp");
|
|
#endif
|
|
DELAY(200);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
cxgb_pcpu_shutdown_threads(struct adapter *sc)
|
|
{
|
|
int i, j;
|
|
int nqsets;
|
|
|
|
for (i = 0; i < sc->params.nports; i++) {
|
|
struct port_info *pi = &sc->port[i];
|
|
int first = pi->first_qset;
|
|
|
|
#ifdef IFNET_MULTIQUEUE
|
|
nqsets = pi->nqsets;
|
|
#else
|
|
nqsets = 1;
|
|
#endif
|
|
for (j = 0; j < nqsets; j++) {
|
|
struct sge_qset *qs = &sc->sge.qs[first + j];
|
|
|
|
qs->qs_flags |= QS_EXITING;
|
|
wakeup(qs);
|
|
tsleep(&sc, PRI_MIN_TIMESHARE, "cxgb unload 0", hz>>2);
|
|
while (qs->qs_flags & QS_RUNNING) {
|
|
qs->qs_flags |= QS_EXITING;
|
|
device_printf(sc->dev, "qset thread %d still running - sleeping\n", first + j);
|
|
tsleep(&sc, PRI_MIN_TIMESHARE, "cxgb unload 1", 2*hz);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static __inline void
|
|
check_pkt_coalesce(struct sge_qset *qs)
|
|
{
|
|
struct adapter *sc;
|
|
struct sge_txq *txq;
|
|
|
|
txq = &qs->txq[TXQ_ETH];
|
|
sc = qs->port->adapter;
|
|
|
|
if (sc->tunq_fill[qs->idx] && (txq->in_use < (txq->size - (txq->size>>2))))
|
|
sc->tunq_fill[qs->idx] = 0;
|
|
else if (!sc->tunq_fill[qs->idx] && (txq->in_use > (txq->size - (txq->size>>2))))
|
|
sc->tunq_fill[qs->idx] = 1;
|
|
}
|
|
|
|
static int
|
|
cxgb_tx(struct sge_qset *qs, uint32_t txmax)
|
|
{
|
|
struct sge_txq *txq;
|
|
struct ifnet *ifp = qs->port->ifp;
|
|
int i, err, in_use_init, count;
|
|
struct mbuf *m_vec[TX_WR_COUNT_MAX];
|
|
|
|
txq = &qs->txq[TXQ_ETH];
|
|
ifp = qs->port->ifp;
|
|
in_use_init = txq->in_use;
|
|
count = err = 0;
|
|
|
|
mtx_assert(&txq->lock, MA_OWNED);
|
|
while ((txq->in_use - in_use_init < txmax) &&
|
|
(txq->size > txq->in_use + TX_MAX_DESC)) {
|
|
check_pkt_coalesce(qs);
|
|
count = cxgb_dequeue_packet(txq, m_vec);
|
|
if (count == 0)
|
|
break;
|
|
for (i = 0; i < count; i++)
|
|
ETHER_BPF_MTAP(ifp, m_vec[i]);
|
|
|
|
if ((err = t3_encap(qs, m_vec, count)) != 0)
|
|
break;
|
|
txq->txq_enqueued += count;
|
|
}
|
|
if (txq->size <= txq->in_use + TX_MAX_DESC) {
|
|
txq_fills++;
|
|
setbit(&qs->txq_stopped, TXQ_ETH);
|
|
}
|
|
if (err == ENOMEM) {
|
|
int i;
|
|
/*
|
|
* Sub-optimal :-/
|
|
*/
|
|
printf("ENOMEM!!!");
|
|
for (i = 0; i < count; i++)
|
|
m_freem(m_vec[i]);
|
|
}
|
|
return (err);
|
|
}
|
|
|