1331722Seadler/* 2260368Sluigi * Copyright (C) 2011-2014 Luigi Rizzo. All rights reserved. 3227614Sluigi * 4227614Sluigi * Redistribution and use in source and binary forms, with or without 5227614Sluigi * modification, are permitted provided that the following conditions 6227614Sluigi * are met: 7227614Sluigi * 1. Redistributions of source code must retain the above copyright 8227614Sluigi * notice, this list of conditions and the following disclaimer. 9227614Sluigi * 2. Redistributions in binary form must reproduce the above copyright 10227614Sluigi * notice, this list of conditions and the following disclaimer in the 11227614Sluigi * documentation and/or other materials provided with the distribution. 12227614Sluigi * 13227614Sluigi * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14227614Sluigi * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15227614Sluigi * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16227614Sluigi * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17227614Sluigi * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18227614Sluigi * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19227614Sluigi * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20227614Sluigi * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21227614Sluigi * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22227614Sluigi * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23227614Sluigi * SUCH DAMAGE. 24227614Sluigi */ 25227614Sluigi 26227614Sluigi/* 27227614Sluigi * $FreeBSD: stable/11/sys/dev/netmap/if_re_netmap.h 341477 2018-12-04 17:40:56Z vmaffione $ 28227614Sluigi * 29259412Sluigi * netmap support for: re 30259412Sluigi * 31259412Sluigi * For more details on netmap support please see ixgbe_netmap.h 32227614Sluigi */ 33227614Sluigi 34232238Sluigi 35227614Sluigi#include <net/netmap.h> 36227614Sluigi#include <sys/selinfo.h> 37227614Sluigi#include <vm/vm.h> 38227614Sluigi#include <vm/pmap.h> /* vtophys ? */ 39227614Sluigi#include <dev/netmap/netmap_kern.h> 40227614Sluigi 41227614Sluigi 42227614Sluigi/* 43259412Sluigi * Register/unregister. We are already under netmap lock. 44227614Sluigi */ 45227614Sluigistatic int 46259412Sluigire_netmap_reg(struct netmap_adapter *na, int onoff) 47227614Sluigi{ 48259412Sluigi struct ifnet *ifp = na->ifp; 49227614Sluigi struct rl_softc *adapter = ifp->if_softc; 50227614Sluigi 51259412Sluigi RL_LOCK(adapter); 52259412Sluigi re_stop(adapter); /* also clears IFF_DRV_RUNNING */ 53227614Sluigi if (onoff) { 54259412Sluigi nm_set_native_flags(na); 55227614Sluigi } else { 56259412Sluigi nm_clear_native_flags(na); 57227614Sluigi } 58259412Sluigi re_init_locked(adapter); /* also enables intr */ 59259412Sluigi RL_UNLOCK(adapter); 60259412Sluigi return (ifp->if_drv_flags & IFF_DRV_RUNNING ? 0 : 1); 61227614Sluigi} 62227614Sluigi 63227614Sluigi 64227614Sluigi/* 65227614Sluigi * Reconcile kernel and user view of the transmit ring. 66227614Sluigi */ 67227614Sluigistatic int 68270063Sluigire_netmap_txsync(struct netmap_kring *kring, int flags) 69227614Sluigi{ 70270063Sluigi struct netmap_adapter *na = kring->na; 71259412Sluigi struct ifnet *ifp = na->ifp; 72227614Sluigi struct netmap_ring *ring = kring->ring; 73259412Sluigi u_int nm_i; /* index into the netmap ring */ 74259412Sluigi u_int nic_i; /* index into the NIC ring */ 75260368Sluigi u_int n; 76259412Sluigi u_int const lim = kring->nkr_num_slots - 1; 77260368Sluigi u_int const head = kring->rhead; 78227614Sluigi 79259412Sluigi /* device-specific */ 80259412Sluigi struct rl_softc *sc = ifp->if_softc; 81259412Sluigi struct rl_txdesc *txd = sc->rl_ldata.rl_tx_desc; 82259412Sluigi 83227614Sluigi bus_dmamap_sync(sc->rl_ldata.rl_tx_list_tag, 84259412Sluigi sc->rl_ldata.rl_tx_list_map, 85259412Sluigi BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); // XXX extra postwrite ? 86227614Sluigi 87259412Sluigi /* 88259412Sluigi * First part: process new packets to send. 89259412Sluigi */ 90259412Sluigi nm_i = kring->nr_hwcur; 91260368Sluigi if (nm_i != head) { /* we have new packets to send */ 92259412Sluigi nic_i = sc->rl_ldata.rl_tx_prodidx; 93259412Sluigi // XXX or netmap_idx_k2n(kring, nm_i); 94227614Sluigi 95260368Sluigi for (n = 0; nm_i != head; n++) { 96259412Sluigi struct netmap_slot *slot = &ring->slot[nm_i]; 97259412Sluigi u_int len = slot->len; 98259412Sluigi uint64_t paddr; 99270063Sluigi void *addr = PNMB(na, slot, &paddr); 100250184Sluigi 101259412Sluigi /* device-specific */ 102259412Sluigi struct rl_desc *desc = &sc->rl_ldata.rl_tx_list[nic_i]; 103227614Sluigi int cmd = slot->len | RL_TDESC_CMD_EOF | 104227614Sluigi RL_TDESC_CMD_OWN | RL_TDESC_CMD_SOF ; 105227614Sluigi 106270063Sluigi NM_CHECK_ADDR_LEN(na, addr, len); 107250184Sluigi 108259412Sluigi if (nic_i == lim) /* mark end of ring */ 109227614Sluigi cmd |= RL_TDESC_CMD_EOR; 110227614Sluigi 111227614Sluigi if (slot->flags & NS_BUF_CHANGED) { 112259412Sluigi /* buffer has changed, reload map */ 113227614Sluigi desc->rl_bufaddr_lo = htole32(RL_ADDR_LO(paddr)); 114227614Sluigi desc->rl_bufaddr_hi = htole32(RL_ADDR_HI(paddr)); 115270063Sluigi netmap_reload_map(na, sc->rl_ldata.rl_tx_mtag, 116259412Sluigi txd[nic_i].tx_dmamap, addr); 117227614Sluigi } 118259412Sluigi slot->flags &= ~(NS_REPORT | NS_BUF_CHANGED); 119259412Sluigi 120259412Sluigi /* Fill the slot in the NIC ring. */ 121227614Sluigi desc->rl_cmdstat = htole32(cmd); 122259412Sluigi 123259412Sluigi /* make sure changes to the buffer are synced */ 124227614Sluigi bus_dmamap_sync(sc->rl_ldata.rl_tx_mtag, 125259412Sluigi txd[nic_i].tx_dmamap, 126259412Sluigi BUS_DMASYNC_PREWRITE); 127259412Sluigi 128259412Sluigi nm_i = nm_next(nm_i, lim); 129259412Sluigi nic_i = nm_next(nic_i, lim); 130227614Sluigi } 131259412Sluigi sc->rl_ldata.rl_tx_prodidx = nic_i; 132260368Sluigi kring->nr_hwcur = head; 133227614Sluigi 134259412Sluigi /* synchronize the NIC ring */ 135227614Sluigi bus_dmamap_sync(sc->rl_ldata.rl_tx_list_tag, 136259412Sluigi sc->rl_ldata.rl_tx_list_map, 137259412Sluigi BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 138227614Sluigi 139227614Sluigi /* start ? */ 140227614Sluigi CSR_WRITE_1(sc, sc->rl_txstart, RL_TXSTART_START); 141227614Sluigi } 142259412Sluigi 143259412Sluigi /* 144259412Sluigi * Second part: reclaim buffers for completed transmissions. 145259412Sluigi */ 146260368Sluigi if (flags & NAF_FORCE_RECLAIM || nm_kr_txempty(kring)) { 147259412Sluigi nic_i = sc->rl_ldata.rl_tx_considx; 148259412Sluigi for (n = 0; nic_i != sc->rl_ldata.rl_tx_prodidx; 149259412Sluigi n++, nic_i = RL_TX_DESC_NXT(sc, nic_i)) { 150259412Sluigi uint32_t cmdstat = 151259412Sluigi le32toh(sc->rl_ldata.rl_tx_list[nic_i].rl_cmdstat); 152259412Sluigi if (cmdstat & RL_TDESC_STAT_OWN) 153259412Sluigi break; 154259412Sluigi } 155259412Sluigi if (n > 0) { 156259412Sluigi sc->rl_ldata.rl_tx_considx = nic_i; 157259412Sluigi sc->rl_ldata.rl_tx_free += n; 158260368Sluigi kring->nr_hwtail = nm_prev(netmap_idx_n2k(kring, nic_i), lim); 159259412Sluigi } 160259412Sluigi } 161259412Sluigi 162227614Sluigi return 0; 163227614Sluigi} 164227614Sluigi 165227614Sluigi 166227614Sluigi/* 167227614Sluigi * Reconcile kernel and user view of the receive ring. 168227614Sluigi */ 169227614Sluigistatic int 170270063Sluigire_netmap_rxsync(struct netmap_kring *kring, int flags) 171227614Sluigi{ 172270063Sluigi struct netmap_adapter *na = kring->na; 173259412Sluigi struct ifnet *ifp = na->ifp; 174227614Sluigi struct netmap_ring *ring = kring->ring; 175259412Sluigi u_int nm_i; /* index into the netmap ring */ 176259412Sluigi u_int nic_i; /* index into the NIC ring */ 177260368Sluigi u_int n; 178259412Sluigi u_int const lim = kring->nkr_num_slots - 1; 179285349Sluigi u_int const head = kring->rhead; 180257529Sluigi int force_update = (flags & NAF_FORCE_READ) || kring->nr_kflags & NKR_PENDINTR; 181227614Sluigi 182259412Sluigi /* device-specific */ 183259412Sluigi struct rl_softc *sc = ifp->if_softc; 184259412Sluigi struct rl_rxdesc *rxd = sc->rl_ldata.rl_rx_desc; 185259412Sluigi 186260368Sluigi if (head > lim) 187227614Sluigi return netmap_ring_reinit(kring); 188227614Sluigi 189227614Sluigi bus_dmamap_sync(sc->rl_ldata.rl_rx_list_tag, 190259412Sluigi sc->rl_ldata.rl_rx_list_map, 191259412Sluigi BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 192227614Sluigi 193227614Sluigi /* 194259412Sluigi * First part: import newly received packets. 195232238Sluigi * 196259412Sluigi * This device uses all the buffers in the ring, so we need 197227614Sluigi * another termination condition in addition to RL_RDESC_STAT_OWN 198260368Sluigi * cleared (all buffers could have it cleared). The easiest one 199260368Sluigi * is to stop right before nm_hwcur. 200227614Sluigi */ 201232238Sluigi if (netmap_no_pendintr || force_update) { 202260368Sluigi uint32_t stop_i = nm_prev(kring->nr_hwcur, lim); 203245579Sluigi 204259412Sluigi nic_i = sc->rl_ldata.rl_rx_prodidx; /* next pkt to check */ 205259412Sluigi nm_i = netmap_idx_n2k(kring, nic_i); 206259412Sluigi 207260368Sluigi while (nm_i != stop_i) { 208259412Sluigi struct rl_desc *cur_rx = &sc->rl_ldata.rl_rx_list[nic_i]; 209232238Sluigi uint32_t rxstat = le32toh(cur_rx->rl_cmdstat); 210232238Sluigi uint32_t total_len; 211227614Sluigi 212232238Sluigi if ((rxstat & RL_RDESC_STAT_OWN) != 0) 213232238Sluigi break; 214232238Sluigi total_len = rxstat & sc->rl_rxlenmask; 215232238Sluigi /* XXX subtract crc */ 216232238Sluigi total_len = (total_len < 4) ? 0 : total_len - 4; 217259412Sluigi ring->slot[nm_i].len = total_len; 218341477Svmaffione ring->slot[nm_i].flags = 0; 219232238Sluigi /* sync was in re_newbuf() */ 220232238Sluigi bus_dmamap_sync(sc->rl_ldata.rl_rx_mtag, 221259412Sluigi rxd[nic_i].rx_dmamap, BUS_DMASYNC_POSTREAD); 222271849Sglebius // if_inc_counter(sc->rl_ifp, IFCOUNTER_IPACKETS, 1); 223259412Sluigi nm_i = nm_next(nm_i, lim); 224259412Sluigi nic_i = nm_next(nic_i, lim); 225232238Sluigi } 226260368Sluigi sc->rl_ldata.rl_rx_prodidx = nic_i; 227260368Sluigi kring->nr_hwtail = nm_i; 228232238Sluigi kring->nr_kflags &= ~NKR_PENDINTR; 229227614Sluigi } 230227614Sluigi 231259412Sluigi /* 232259412Sluigi * Second part: skip past packets that userspace has released. 233259412Sluigi */ 234259412Sluigi nm_i = kring->nr_hwcur; 235260368Sluigi if (nm_i != head) { 236259412Sluigi nic_i = netmap_idx_k2n(kring, nm_i); 237260368Sluigi for (n = 0; nm_i != head; n++) { 238259412Sluigi struct netmap_slot *slot = &ring->slot[nm_i]; 239229939Sluigi uint64_t paddr; 240270063Sluigi void *addr = PNMB(na, slot, &paddr); 241227614Sluigi 242259412Sluigi struct rl_desc *desc = &sc->rl_ldata.rl_rx_list[nic_i]; 243270063Sluigi int cmd = NETMAP_BUF_SIZE(na) | RL_RDESC_CMD_OWN; 244227614Sluigi 245270063Sluigi if (addr == NETMAP_BUF_BASE(na)) /* bad buf */ 246259412Sluigi goto ring_reset; 247259412Sluigi 248259412Sluigi if (nic_i == lim) /* mark end of ring */ 249227614Sluigi cmd |= RL_RDESC_CMD_EOR; 250227614Sluigi 251227614Sluigi if (slot->flags & NS_BUF_CHANGED) { 252259412Sluigi /* buffer has changed, reload map */ 253227614Sluigi desc->rl_bufaddr_lo = htole32(RL_ADDR_LO(paddr)); 254227614Sluigi desc->rl_bufaddr_hi = htole32(RL_ADDR_HI(paddr)); 255270063Sluigi netmap_reload_map(na, sc->rl_ldata.rl_rx_mtag, 256259412Sluigi rxd[nic_i].rx_dmamap, addr); 257227614Sluigi slot->flags &= ~NS_BUF_CHANGED; 258227614Sluigi } 259232238Sluigi desc->rl_cmdstat = htole32(cmd); 260227614Sluigi bus_dmamap_sync(sc->rl_ldata.rl_rx_mtag, 261259412Sluigi rxd[nic_i].rx_dmamap, 262259412Sluigi BUS_DMASYNC_PREREAD); 263259412Sluigi nm_i = nm_next(nm_i, lim); 264259412Sluigi nic_i = nm_next(nic_i, lim); 265227614Sluigi } 266260368Sluigi kring->nr_hwcur = head; 267227614Sluigi 268227614Sluigi bus_dmamap_sync(sc->rl_ldata.rl_rx_list_tag, 269227614Sluigi sc->rl_ldata.rl_rx_list_map, 270259412Sluigi BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 271227614Sluigi } 272259412Sluigi 273227614Sluigi return 0; 274259412Sluigi 275259412Sluigiring_reset: 276259412Sluigi return netmap_ring_reinit(kring); 277227614Sluigi} 278227614Sluigi 279259412Sluigi 280228276Sluigi/* 281228276Sluigi * Additional routines to init the tx and rx rings. 282228276Sluigi * In other drivers we do that inline in the main code. 283228276Sluigi */ 284227614Sluigistatic void 285227614Sluigire_netmap_tx_init(struct rl_softc *sc) 286250184Sluigi{ 287227614Sluigi struct rl_txdesc *txd; 288227614Sluigi struct rl_desc *desc; 289228276Sluigi int i, n; 290227614Sluigi struct netmap_adapter *na = NA(sc->rl_ifp); 291259412Sluigi struct netmap_slot *slot; 292227614Sluigi 293259412Sluigi slot = netmap_reset(na, NR_TX, 0, 0); 294270063Sluigi /* slot is NULL if we are not in native netmap mode */ 295227614Sluigi if (!slot) 296270063Sluigi return; 297227614Sluigi /* in netmap mode, overwrite addresses and maps */ 298227614Sluigi txd = sc->rl_ldata.rl_tx_desc; 299227614Sluigi desc = sc->rl_ldata.rl_tx_list; 300228276Sluigi n = sc->rl_ldata.rl_tx_desc_cnt; 301227614Sluigi 302228276Sluigi /* l points in the netmap ring, i points in the NIC ring */ 303228276Sluigi for (i = 0; i < n; i++) { 304228276Sluigi uint64_t paddr; 305341477Svmaffione int l = netmap_idx_n2k(na->tx_rings[0], i); 306270063Sluigi void *addr = PNMB(na, slot + l, &paddr); 307227614Sluigi 308227614Sluigi desc[i].rl_bufaddr_lo = htole32(RL_ADDR_LO(paddr)); 309227614Sluigi desc[i].rl_bufaddr_hi = htole32(RL_ADDR_HI(paddr)); 310270063Sluigi netmap_load_map(na, sc->rl_ldata.rl_tx_mtag, 311229939Sluigi txd[i].tx_dmamap, addr); 312227614Sluigi } 313227614Sluigi} 314227614Sluigi 315227614Sluigistatic void 316227614Sluigire_netmap_rx_init(struct rl_softc *sc) 317227614Sluigi{ 318227614Sluigi struct netmap_adapter *na = NA(sc->rl_ifp); 319227614Sluigi struct netmap_slot *slot = netmap_reset(na, NR_RX, 0, 0); 320227614Sluigi struct rl_desc *desc = sc->rl_ldata.rl_rx_list; 321227614Sluigi uint32_t cmdstat; 322260368Sluigi uint32_t nic_i, max_avail; 323260368Sluigi uint32_t const n = sc->rl_ldata.rl_rx_desc_cnt; 324227614Sluigi 325227614Sluigi if (!slot) 326227614Sluigi return; 327231796Sluigi /* 328260368Sluigi * Do not release the slots owned by userspace, 329260368Sluigi * and also keep one empty. 330231796Sluigi */ 331341477Svmaffione max_avail = n - 1 - nm_kr_rxspace(na->rx_rings[0]); 332260368Sluigi for (nic_i = 0; nic_i < n; nic_i++) { 333228276Sluigi void *addr; 334228276Sluigi uint64_t paddr; 335341477Svmaffione uint32_t nm_i = netmap_idx_n2k(na->rx_rings[0], nic_i); 336227614Sluigi 337270063Sluigi addr = PNMB(na, slot + nm_i, &paddr); 338229939Sluigi 339270063Sluigi netmap_reload_map(na, sc->rl_ldata.rl_rx_mtag, 340260368Sluigi sc->rl_ldata.rl_rx_desc[nic_i].rx_dmamap, addr); 341229939Sluigi bus_dmamap_sync(sc->rl_ldata.rl_rx_mtag, 342260368Sluigi sc->rl_ldata.rl_rx_desc[nic_i].rx_dmamap, BUS_DMASYNC_PREREAD); 343260368Sluigi desc[nic_i].rl_bufaddr_lo = htole32(RL_ADDR_LO(paddr)); 344260368Sluigi desc[nic_i].rl_bufaddr_hi = htole32(RL_ADDR_HI(paddr)); 345270063Sluigi cmdstat = NETMAP_BUF_SIZE(na); 346260368Sluigi if (nic_i == n - 1) /* mark the end of ring */ 347227614Sluigi cmdstat |= RL_RDESC_CMD_EOR; 348260368Sluigi if (nic_i < max_avail) 349228276Sluigi cmdstat |= RL_RDESC_CMD_OWN; 350260368Sluigi desc[nic_i].rl_cmdstat = htole32(cmdstat); 351227614Sluigi } 352227614Sluigi} 353232238Sluigi 354232238Sluigi 355232238Sluigistatic void 356232238Sluigire_netmap_attach(struct rl_softc *sc) 357232238Sluigi{ 358232238Sluigi struct netmap_adapter na; 359232238Sluigi 360232238Sluigi bzero(&na, sizeof(na)); 361232238Sluigi 362232238Sluigi na.ifp = sc->rl_ifp; 363257529Sluigi na.na_flags = NAF_BDG_MAYSLEEP; 364232238Sluigi na.num_tx_desc = sc->rl_ldata.rl_tx_desc_cnt; 365232238Sluigi na.num_rx_desc = sc->rl_ldata.rl_rx_desc_cnt; 366232238Sluigi na.nm_txsync = re_netmap_txsync; 367232238Sluigi na.nm_rxsync = re_netmap_rxsync; 368232238Sluigi na.nm_register = re_netmap_reg; 369259412Sluigi na.num_tx_rings = na.num_rx_rings = 1; 370259412Sluigi netmap_attach(&na); 371232238Sluigi} 372259412Sluigi 373232238Sluigi/* end of file */ 374