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if_ptnet.c
(50.06 KB)
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if_re_netmap.h
(10.69 KB)
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if_vtnet_netmap.h
(13.11 KB)
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netmap.c
(122.05 KB)
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netmap_bdg.c
(42.24 KB)
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netmap_bdg.h
(7.36 KB)
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netmap_freebsd.c
(37.75 KB)
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netmap_generic.c
(30.16 KB)
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netmap_kern.h
(74.52 KB)
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netmap_kloop.c
(32.74 KB)
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netmap_legacy.c
(12.16 KB)
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netmap_mbq.c
(3.39 KB)
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netmap_mbq.h
(2.83 KB)
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netmap_mem2.c
(69.45 KB)
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netmap_mem2.h
(8.15 KB)
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netmap_monitor.c
(27.77 KB)
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netmap_null.c
(4.17 KB)
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netmap_offloadings.c
(14.11 KB)
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netmap_pipe.c
(22.37 KB)
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netmap_vale.c
(43.16 KB)
Editing: if_re_netmap.h
/*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (C) 2011-2014 Luigi Rizzo. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 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. */ /* * $FreeBSD$ * * netmap support for: re * * For more details on netmap support please see ixgbe_netmap.h */ #include <net/netmap.h> #include <sys/selinfo.h> #include <vm/vm.h> #include <vm/pmap.h> /* vtophys ? */ #include <dev/netmap/netmap_kern.h> /* * Register/unregister. We are already under netmap lock. */ static int re_netmap_reg(struct netmap_adapter *na, int onoff) { struct ifnet *ifp = na->ifp; struct rl_softc *adapter = ifp->if_softc; RL_LOCK(adapter); re_stop(adapter); /* also clears IFF_DRV_RUNNING */ if (onoff) { nm_set_native_flags(na); } else { nm_clear_native_flags(na); } re_init_locked(adapter); /* also enables intr */ RL_UNLOCK(adapter); return (ifp->if_drv_flags & IFF_DRV_RUNNING ? 0 : 1); } /* * Reconcile kernel and user view of the transmit ring. */ static int re_netmap_txsync(struct netmap_kring *kring, int flags) { struct netmap_adapter *na = kring->na; struct ifnet *ifp = na->ifp; struct netmap_ring *ring = kring->ring; u_int nm_i; /* index into the netmap ring */ u_int nic_i; /* index into the NIC ring */ u_int n; u_int const lim = kring->nkr_num_slots - 1; u_int const head = kring->rhead; /* device-specific */ struct rl_softc *sc = ifp->if_softc; struct rl_txdesc *txd = sc->rl_ldata.rl_tx_desc; bus_dmamap_sync(sc->rl_ldata.rl_tx_list_tag, sc->rl_ldata.rl_tx_list_map, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); // XXX extra postwrite ? /* * First part: process new packets to send. */ nm_i = kring->nr_hwcur; if (nm_i != head) { /* we have new packets to send */ nic_i = sc->rl_ldata.rl_tx_prodidx; // XXX or netmap_idx_k2n(kring, nm_i); for (n = 0; nm_i != head; n++) { struct netmap_slot *slot = &ring->slot[nm_i]; u_int len = slot->len; uint64_t paddr; void *addr = PNMB(na, slot, &paddr); /* device-specific */ struct rl_desc *desc = &sc->rl_ldata.rl_tx_list[nic_i]; int cmd = slot->len | RL_TDESC_CMD_EOF | RL_TDESC_CMD_OWN | RL_TDESC_CMD_SOF ; NM_CHECK_ADDR_LEN(na, addr, len); if (nic_i == lim) /* mark end of ring */ cmd |= RL_TDESC_CMD_EOR; if (slot->flags & NS_BUF_CHANGED) { /* buffer has changed, reload map */ desc->rl_bufaddr_lo = htole32(RL_ADDR_LO(paddr)); desc->rl_bufaddr_hi = htole32(RL_ADDR_HI(paddr)); netmap_reload_map(na, sc->rl_ldata.rl_tx_mtag, txd[nic_i].tx_dmamap, addr); } slot->flags &= ~(NS_REPORT | NS_BUF_CHANGED); /* Fill the slot in the NIC ring. */ desc->rl_cmdstat = htole32(cmd); /* make sure changes to the buffer are synced */ bus_dmamap_sync(sc->rl_ldata.rl_tx_mtag, txd[nic_i].tx_dmamap, BUS_DMASYNC_PREWRITE); nm_i = nm_next(nm_i, lim); nic_i = nm_next(nic_i, lim); } sc->rl_ldata.rl_tx_prodidx = nic_i; kring->nr_hwcur = head; /* synchronize the NIC ring */ bus_dmamap_sync(sc->rl_ldata.rl_tx_list_tag, sc->rl_ldata.rl_tx_list_map, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); /* start ? */ CSR_WRITE_1(sc, sc->rl_txstart, RL_TXSTART_START); } /* * Second part: reclaim buffers for completed transmissions. */ if (flags & NAF_FORCE_RECLAIM || nm_kr_txempty(kring)) { nic_i = sc->rl_ldata.rl_tx_considx; for (n = 0; nic_i != sc->rl_ldata.rl_tx_prodidx; n++, nic_i = RL_TX_DESC_NXT(sc, nic_i)) { uint32_t cmdstat = le32toh(sc->rl_ldata.rl_tx_list[nic_i].rl_cmdstat); if (cmdstat & RL_TDESC_STAT_OWN) break; } if (n > 0) { sc->rl_ldata.rl_tx_considx = nic_i; sc->rl_ldata.rl_tx_free += n; kring->nr_hwtail = nm_prev(netmap_idx_n2k(kring, nic_i), lim); } } return 0; } /* * Reconcile kernel and user view of the receive ring. */ static int re_netmap_rxsync(struct netmap_kring *kring, int flags) { struct netmap_adapter *na = kring->na; struct ifnet *ifp = na->ifp; struct netmap_ring *ring = kring->ring; u_int nm_i; /* index into the netmap ring */ u_int nic_i; /* index into the NIC ring */ u_int n; u_int const lim = kring->nkr_num_slots - 1; u_int const head = kring->rhead; int force_update = (flags & NAF_FORCE_READ) || kring->nr_kflags & NKR_PENDINTR; /* device-specific */ struct rl_softc *sc = ifp->if_softc; struct rl_rxdesc *rxd = sc->rl_ldata.rl_rx_desc; if (head > lim) return netmap_ring_reinit(kring); bus_dmamap_sync(sc->rl_ldata.rl_rx_list_tag, sc->rl_ldata.rl_rx_list_map, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); /* * First part: import newly received packets. * * This device uses all the buffers in the ring, so we need * another termination condition in addition to RL_RDESC_STAT_OWN * cleared (all buffers could have it cleared). The easiest one * is to stop right before nm_hwcur. */ if (netmap_no_pendintr || force_update) { uint32_t stop_i = nm_prev(kring->nr_hwcur, lim); nic_i = sc->rl_ldata.rl_rx_prodidx; /* next pkt to check */ nm_i = netmap_idx_n2k(kring, nic_i); while (nm_i != stop_i) { struct rl_desc *cur_rx = &sc->rl_ldata.rl_rx_list[nic_i]; uint32_t rxstat = le32toh(cur_rx->rl_cmdstat); uint32_t total_len; if ((rxstat & RL_RDESC_STAT_OWN) != 0) break; total_len = rxstat & sc->rl_rxlenmask; /* XXX subtract crc */ total_len = (total_len < 4) ? 0 : total_len - 4; ring->slot[nm_i].len = total_len; ring->slot[nm_i].flags = 0; /* sync was in re_newbuf() */ bus_dmamap_sync(sc->rl_ldata.rl_rx_mtag, rxd[nic_i].rx_dmamap, BUS_DMASYNC_POSTREAD); // if_inc_counter(sc->rl_ifp, IFCOUNTER_IPACKETS, 1); nm_i = nm_next(nm_i, lim); nic_i = nm_next(nic_i, lim); } sc->rl_ldata.rl_rx_prodidx = nic_i; kring->nr_hwtail = nm_i; kring->nr_kflags &= ~NKR_PENDINTR; } /* * Second part: skip past packets that userspace has released. */ nm_i = kring->nr_hwcur; if (nm_i != head) { nic_i = netmap_idx_k2n(kring, nm_i); for (n = 0; nm_i != head; n++) { struct netmap_slot *slot = &ring->slot[nm_i]; uint64_t paddr; void *addr = PNMB(na, slot, &paddr); struct rl_desc *desc = &sc->rl_ldata.rl_rx_list[nic_i]; int cmd = NETMAP_BUF_SIZE(na) | RL_RDESC_CMD_OWN; if (addr == NETMAP_BUF_BASE(na)) /* bad buf */ goto ring_reset; if (nic_i == lim) /* mark end of ring */ cmd |= RL_RDESC_CMD_EOR; if (slot->flags & NS_BUF_CHANGED) { /* buffer has changed, reload map */ desc->rl_bufaddr_lo = htole32(RL_ADDR_LO(paddr)); desc->rl_bufaddr_hi = htole32(RL_ADDR_HI(paddr)); netmap_reload_map(na, sc->rl_ldata.rl_rx_mtag, rxd[nic_i].rx_dmamap, addr); slot->flags &= ~NS_BUF_CHANGED; } desc->rl_cmdstat = htole32(cmd); bus_dmamap_sync(sc->rl_ldata.rl_rx_mtag, rxd[nic_i].rx_dmamap, BUS_DMASYNC_PREREAD); nm_i = nm_next(nm_i, lim); nic_i = nm_next(nic_i, lim); } kring->nr_hwcur = head; bus_dmamap_sync(sc->rl_ldata.rl_rx_list_tag, sc->rl_ldata.rl_rx_list_map, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); } return 0; ring_reset: return netmap_ring_reinit(kring); } /* * Additional routines to init the tx and rx rings. * In other drivers we do that inline in the main code. */ static void re_netmap_tx_init(struct rl_softc *sc) { struct rl_txdesc *txd; struct rl_desc *desc; int i, n; struct netmap_adapter *na = NA(sc->rl_ifp); struct netmap_slot *slot; slot = netmap_reset(na, NR_TX, 0, 0); /* slot is NULL if we are not in native netmap mode */ if (!slot) return; /* in netmap mode, overwrite addresses and maps */ txd = sc->rl_ldata.rl_tx_desc; desc = sc->rl_ldata.rl_tx_list; n = sc->rl_ldata.rl_tx_desc_cnt; /* l points in the netmap ring, i points in the NIC ring */ for (i = 0; i < n; i++) { uint64_t paddr; int l = netmap_idx_n2k(na->tx_rings[0], i); void *addr = PNMB(na, slot + l, &paddr); desc[i].rl_bufaddr_lo = htole32(RL_ADDR_LO(paddr)); desc[i].rl_bufaddr_hi = htole32(RL_ADDR_HI(paddr)); netmap_load_map(na, sc->rl_ldata.rl_tx_mtag, txd[i].tx_dmamap, addr); } } static void re_netmap_rx_init(struct rl_softc *sc) { struct netmap_adapter *na = NA(sc->rl_ifp); struct netmap_slot *slot = netmap_reset(na, NR_RX, 0, 0); struct rl_desc *desc = sc->rl_ldata.rl_rx_list; uint32_t cmdstat; uint32_t nic_i, max_avail; uint32_t const n = sc->rl_ldata.rl_rx_desc_cnt; if (!slot) return; /* * Do not release the slots owned by userspace, * and also keep one empty. */ max_avail = n - 1 - nm_kr_rxspace(na->rx_rings[0]); for (nic_i = 0; nic_i < n; nic_i++) { void *addr; uint64_t paddr; uint32_t nm_i = netmap_idx_n2k(na->rx_rings[0], nic_i); addr = PNMB(na, slot + nm_i, &paddr); netmap_reload_map(na, sc->rl_ldata.rl_rx_mtag, sc->rl_ldata.rl_rx_desc[nic_i].rx_dmamap, addr); bus_dmamap_sync(sc->rl_ldata.rl_rx_mtag, sc->rl_ldata.rl_rx_desc[nic_i].rx_dmamap, BUS_DMASYNC_PREREAD); desc[nic_i].rl_bufaddr_lo = htole32(RL_ADDR_LO(paddr)); desc[nic_i].rl_bufaddr_hi = htole32(RL_ADDR_HI(paddr)); cmdstat = NETMAP_BUF_SIZE(na); if (nic_i == n - 1) /* mark the end of ring */ cmdstat |= RL_RDESC_CMD_EOR; if (nic_i < max_avail) cmdstat |= RL_RDESC_CMD_OWN; desc[nic_i].rl_cmdstat = htole32(cmdstat); } } static void re_netmap_attach(struct rl_softc *sc) { struct netmap_adapter na; bzero(&na, sizeof(na)); na.ifp = sc->rl_ifp; na.na_flags = NAF_BDG_MAYSLEEP; na.num_tx_desc = sc->rl_ldata.rl_tx_desc_cnt; na.num_rx_desc = sc->rl_ldata.rl_rx_desc_cnt; na.nm_txsync = re_netmap_txsync; na.nm_rxsync = re_netmap_rxsync; na.nm_register = re_netmap_reg; na.num_tx_rings = na.num_rx_rings = 1; netmap_attach(&na); } /* end of file */
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