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https://github.com/freebsd/freebsd-src
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Add support for mbuf iovec in the TX path
This commit is contained in:
Kip Macy
parent
642046797b
commit
51580731ae
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=168737
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@ -56,8 +56,6 @@ __FBSDID("$FreeBSD$");
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#include <sys/queue.h>
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#include <sys/taskqueue.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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@ -85,6 +83,8 @@ __FBSDID("$FreeBSD$");
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#include <dev/cxgb/common/cxgb_t3_cpl.h>
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#include <dev/cxgb/common/cxgb_firmware_exports.h>
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#include <dev/cxgb/sys/mvec.h>
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#ifdef PRIV_SUPPORTED
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#include <sys/priv.h>
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@ -532,6 +532,11 @@ cxgb_free(struct adapter *sc)
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{
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int i;
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/*
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* XXX need to drain the ifq by hand until
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* it is taught about mbuf iovecs
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*/
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callout_drain(&sc->cxgb_tick_ch);
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t3_sge_deinit_sw(sc);
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@ -1188,6 +1193,9 @@ cxgb_ioctl(struct ifnet *ifp, unsigned long command, caddr_t data)
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int flags, error = 0;
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uint32_t mask;
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/*
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* XXX need to check that we aren't in the middle of an unload
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*/
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switch (command) {
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case SIOCSIFMTU:
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if ((ifr->ifr_mtu < ETHERMIN) ||
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@ -1212,7 +1220,6 @@ cxgb_ioctl(struct ifnet *ifp, unsigned long command, caddr_t data)
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error = ether_ioctl(ifp, command, data);
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break;
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case SIOCSIFFLAGS:
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if (ifp->if_flags & IFF_UP) {
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PORT_LOCK(p);
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if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
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@ -1294,7 +1301,7 @@ cxgb_start_tx(struct ifnet *ifp, uint32_t txmax)
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struct sge_qset *qs;
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struct sge_txq *txq;
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struct port_info *p = ifp->if_softc;
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struct mbuf *m = NULL;
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struct mbuf *m0, *m = NULL;
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int err, in_use_init;
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@ -1315,6 +1322,33 @@ cxgb_start_tx(struct ifnet *ifp, uint32_t txmax)
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IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
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if (m == NULL)
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break;
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/*
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* Convert chain to M_IOVEC
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*/
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KASSERT((m->m_flags & M_IOVEC) == 0, ("IOVEC set too early"));
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m0 = m;
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#ifdef INVARIANTS
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/*
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* Clean up after net stack sloppiness
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* before calling m_sanity
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*/
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m0 = m->m_next;
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while (m0) {
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m0->m_flags &= ~M_PKTHDR;
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m0 = m0->m_next;
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}
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m_sanity(m0, 0);
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m0 = m;
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#endif
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if (m->m_pkthdr.len > MCLBYTES &&
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m_collapse(m, TX_MAX_SEGS, &m0) == EFBIG) {
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if ((m0 = m_defrag(m, M_NOWAIT)) != NULL) {
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m = m0;
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m_collapse(m, TX_MAX_SEGS, &m0);
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} else
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break;
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}
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m = m0;
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if ((err = t3_encap(p, &m)) != 0)
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break;
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BPF_MTAP(ifp, m);
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@ -69,6 +69,10 @@ __FBSDID("$FreeBSD$");
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#include <dev/cxgb/sys/mvec.h>
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uint32_t collapse_free = 0;
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uint32_t mb_free_vec_free = 0;
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#define USE_GTS 0
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#define SGE_RX_SM_BUF_SIZE 1536
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@ -113,6 +117,7 @@ struct rsp_desc { /* response queue descriptor */
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} __packed;
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#define RX_SW_DESC_MAP_CREATED (1 << 0)
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#define TX_SW_DESC_MAP_CREATED (1 << 1)
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#define RX_SW_DESC_INUSE (1 << 3)
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#define TX_SW_DESC_MAPPED (1 << 4)
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@ -269,7 +274,7 @@ sgl_len(unsigned int n)
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*
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* Return a packet containing the immediate data of the given response.
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*/
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static __inline int
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static __inline void
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get_imm_packet(adapter_t *sc, const struct rsp_desc *resp, struct mbuf *m, void *cl)
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{
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int len;
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@ -280,28 +285,19 @@ get_imm_packet(adapter_t *sc, const struct rsp_desc *resp, struct mbuf *m, void
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* would be a firmware bug
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*/
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if (sopeop == RSPQ_NSOP_NEOP || sopeop == RSPQ_SOP)
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return (0);
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return;
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len = G_RSPD_LEN(ntohl(resp->len_cq));
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if (m) {
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switch (sopeop) {
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case RSPQ_SOP_EOP:
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m = m_gethdr(M_NOWAIT, MT_DATA);
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m->m_len = m->m_pkthdr.len = len;
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memcpy(m->m_data, resp->imm_data, IMMED_PKT_SIZE);
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MH_ALIGN(m, IMMED_PKT_SIZE);
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break;
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case RSPQ_EOP:
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memcpy(cl, resp->imm_data, len);
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m_iovappend(m, cl, MSIZE, len, 0);
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break;
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}
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len = G_RSPD_LEN(ntohl(resp->len_cq));
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switch (sopeop) {
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case RSPQ_SOP_EOP:
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m->m_len = m->m_pkthdr.len = len;
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memcpy(m->m_data, resp->imm_data, len);
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break;
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case RSPQ_EOP:
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memcpy(cl, resp->imm_data, len);
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m_iovappend(m, cl, MSIZE, len, 0);
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break;
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}
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return (m != NULL);
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}
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@ -722,7 +718,7 @@ sge_timer_reclaim(void *arg, int ncount)
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mtx_unlock(&txq->lock);
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for (i = 0; i < n; i++) {
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m_freem(m_vec[i]);
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m_freem_vec(m_vec[i]);
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}
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}
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@ -734,7 +730,7 @@ sge_timer_reclaim(void *arg, int ncount)
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mtx_unlock(&txq->lock);
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for (i = 0; i < n; i++) {
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m_freem(m_vec[i]);
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m_freem_vec(m_vec[i]);
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}
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}
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@ -825,7 +821,7 @@ calc_tx_descs(const struct mbuf *m, int nsegs)
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flits = sgl_len(nsegs) + 2;
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#ifdef TSO_SUPPORTED
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if (m->m_pkthdr.tso_segsz)
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if (m->m_pkthdr.csum_flags & (CSUM_TSO))
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flits++;
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#endif
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return flits_to_desc(flits);
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@ -840,7 +836,16 @@ busdma_map_mbufs(struct mbuf **m, struct sge_txq *txq,
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m0 = *m;
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pktlen = m0->m_pkthdr.len;
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err = bus_dmamap_load_mbuf_sg(txq->entry_tag, stx->map, m0, segs, nsegs, 0);
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if ((stx->flags & TX_SW_DESC_MAP_CREATED) == 0) {
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if ((err = bus_dmamap_create(txq->entry_tag, 0, &stx->map))) {
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log(LOG_WARNING, "bus_dmamap_create failed %d\n", err);
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return (err);
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}
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stx->flags |= TX_SW_DESC_MAP_CREATED;
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}
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err = bus_dmamap_load_mvec_sg(txq->entry_tag, stx->map, m0, segs, nsegs, 0);
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#ifdef DEBUG
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if (err) {
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int n = 0;
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struct mbuf *mtmp = m0;
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@ -848,12 +853,10 @@ busdma_map_mbufs(struct mbuf **m, struct sge_txq *txq,
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n++;
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mtmp = mtmp->m_next;
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}
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#ifdef DEBUG
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printf("map_mbufs: bus_dmamap_load_mbuf_sg failed with %d - pkthdr.len==%d nmbufs=%d\n",
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err, m0->m_pkthdr.len, n);
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#endif
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}
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#endif
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if (err == EFBIG) {
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/* Too many segments, try to defrag */
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m0 = m_defrag(m0, M_NOWAIT);
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@ -873,7 +876,7 @@ busdma_map_mbufs(struct mbuf **m, struct sge_txq *txq,
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if (err) {
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if (cxgb_debug)
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printf("map failure err=%d pktlen=%d\n", err, pktlen);
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m_freem(m0);
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m_freem_vec(m0);
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*m = NULL;
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return (err);
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}
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@ -1002,7 +1005,6 @@ t3_encap(struct port_info *p, struct mbuf **m)
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cntrl |= F_TXPKT_VLAN_VLD | V_TXPKT_VLAN(m0->m_pkthdr.ether_vtag);
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if (m0->m_pkthdr.csum_flags & (CSUM_TSO))
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tso_info = V_LSO_MSS(m0->m_pkthdr.tso_segsz);
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#endif
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if (tso_info) {
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int eth_type;
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@ -1010,7 +1012,7 @@ t3_encap(struct port_info *p, struct mbuf **m)
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struct ip *ip;
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struct tcphdr *tcp;
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uint8_t *pkthdr, tmp[TCPPKTHDRSIZE]; /* is this too large for the stack? */
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txd->flit[2] = 0;
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cntrl |= V_TXPKT_OPCODE(CPL_TX_PKT_LSO);
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hdr->cntrl = htonl(cntrl);
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@ -1032,12 +1034,11 @@ t3_encap(struct port_info *p, struct mbuf **m)
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}
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tcp = (struct tcphdr *)((uint8_t *)ip +
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sizeof(*ip));
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tso_info |= V_LSO_ETH_TYPE(eth_type) |
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V_LSO_IPHDR_WORDS(ip->ip_hl) |
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V_LSO_TCPHDR_WORDS(tcp->th_off);
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hdr->lso_info = htonl(tso_info);
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flits = 3;
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} else {
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cntrl |= V_TXPKT_OPCODE(CPL_TX_PKT);
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@ -1051,7 +1052,7 @@ t3_encap(struct port_info *p, struct mbuf **m)
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memcpy(&txd->flit[2], m0->m_data, mlen);
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else
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m_copydata(m0, 0, mlen, (caddr_t)&txd->flit[2]);
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flits = (mlen + 7) / 8 + 2;
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cpl->wr.wr_hi = htonl(V_WR_BCNTLFLT(mlen & 7) |
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V_WR_OP(FW_WROPCODE_TUNNEL_TX_PKT) |
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@ -1430,7 +1431,6 @@ t3_sge_alloc_qset(adapter_t *sc, u_int id, int nports, int irq_vec_idx,
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printf("error %d from alloc ring tx %i\n", ret, i);
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goto err;
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}
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q->txq[i].gen = 1;
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q->txq[i].size = p->txq_size[i];
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mtx_init(&q->txq[i].lock, "t3 txq lock", NULL, MTX_DEF);
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@ -1755,9 +1755,13 @@ t3_rx_eth(struct port_info *pi, struct sge_rspq *rq, struct mbuf *m, int ethpad)
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m->m_flags |= M_VLANTAG;
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}
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#endif
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m->m_pkthdr.rcvif = ifp;
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m->m_pkthdr.rcvif = ifp;
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m->m_pkthdr.header = m->m_data + sizeof(*cpl) + ethpad;
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m_explode(m);
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/*
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* adjust after conversion to mbuf chain
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*/
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m_adj(m, sizeof(*cpl) + ethpad);
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(*ifp->if_input)(ifp, m);
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@ -2252,6 +2256,15 @@ t3_add_sysctls(adapter_t *sc)
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CTLFLAG_RW, &cxgb_debug,
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0, "enable verbose debugging output");
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SYSCTL_ADD_INT(ctx, children, OID_AUTO,
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"collapse_free",
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CTLFLAG_RD, &collapse_free,
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0, "frees during collapse");
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SYSCTL_ADD_INT(ctx, children, OID_AUTO,
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"mb_free_vec_free",
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CTLFLAG_RD, &mb_free_vec_free,
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0, "frees during mb_free_vec");
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}
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/**
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