1331722Seadler/* 2260368Sluigi * Copyright (C) 2011-2014 Universita` di Pisa. 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_igb_netmap.h 343771 2019-02-05 10:33:22Z vmaffione $ 28227614Sluigi * 29232238Sluigi * Netmap support for igb, partly contributed by Ahmed Kooli 30232238Sluigi * For details on netmap support please see ixgbe_netmap.h 31227614Sluigi */ 32227614Sluigi 33232238Sluigi 34227614Sluigi#include <net/netmap.h> 35227614Sluigi#include <sys/selinfo.h> 36227614Sluigi#include <vm/vm.h> 37227614Sluigi#include <vm/pmap.h> /* vtophys ? */ 38227614Sluigi#include <dev/netmap/netmap_kern.h> 39227614Sluigi 40259412Sluigi/* 41259412Sluigi * Adaptation to different versions of the driver. 42259412Sluigi */ 43227614Sluigi 44259412Sluigi#ifndef IGB_MEDIA_RESET 45259412Sluigi/* at the same time as IGB_MEDIA_RESET was defined, the 46259412Sluigi * tx buffer descriptor was renamed, so use this to revert 47259412Sluigi * back to the old name. 48259412Sluigi */ 49259412Sluigi#define igb_tx_buf igb_tx_buffer 50259412Sluigi#endif 51259412Sluigi 52259412Sluigi 53227614Sluigi/* 54259412Sluigi * Register/unregister. We are already under netmap lock. 55227614Sluigi */ 56227614Sluigistatic int 57259412Sluigiigb_netmap_reg(struct netmap_adapter *na, int onoff) 58227614Sluigi{ 59259412Sluigi struct ifnet *ifp = na->ifp; 60227614Sluigi struct adapter *adapter = ifp->if_softc; 61227614Sluigi 62259412Sluigi IGB_CORE_LOCK(adapter); 63227614Sluigi igb_disable_intr(adapter); 64227614Sluigi 65227614Sluigi /* Tell the stack that the interface is no longer active */ 66227614Sluigi ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 67227614Sluigi 68259412Sluigi /* enable or disable flags and callbacks in na and ifp */ 69227614Sluigi if (onoff) { 70259412Sluigi nm_set_native_flags(na); 71227614Sluigi } else { 72259412Sluigi nm_clear_native_flags(na); 73227614Sluigi } 74259412Sluigi igb_init_locked(adapter); /* also enable intr */ 75259412Sluigi IGB_CORE_UNLOCK(adapter); 76259412Sluigi return (ifp->if_drv_flags & IFF_DRV_RUNNING ? 0 : 1); 77227614Sluigi} 78227614Sluigi 79227614Sluigi 80227614Sluigi/* 81232238Sluigi * Reconcile kernel and user view of the transmit ring. 82227614Sluigi */ 83227614Sluigistatic int 84270063Sluigiigb_netmap_txsync(struct netmap_kring *kring, int flags) 85227614Sluigi{ 86270063Sluigi struct netmap_adapter *na = kring->na; 87259412Sluigi struct ifnet *ifp = na->ifp; 88227614Sluigi struct netmap_ring *ring = kring->ring; 89259412Sluigi u_int nm_i; /* index into the netmap ring */ 90259412Sluigi u_int nic_i; /* index into the NIC ring */ 91260368Sluigi u_int n; 92259412Sluigi u_int const lim = kring->nkr_num_slots - 1; 93260368Sluigi u_int const head = kring->rhead; 94227614Sluigi /* generate an interrupt approximately every half ring */ 95238985Sluigi u_int report_frequency = kring->nkr_num_slots >> 1; 96227614Sluigi 97259412Sluigi /* device-specific */ 98259412Sluigi struct adapter *adapter = ifp->if_softc; 99270063Sluigi struct tx_ring *txr = &adapter->tx_rings[kring->ring_id]; 100259412Sluigi /* 82575 needs the queue index added */ 101259412Sluigi u32 olinfo_status = 102259412Sluigi (adapter->hw.mac.type == e1000_82575) ? (txr->me << 4) : 0; 103259412Sluigi 104227614Sluigi bus_dmamap_sync(txr->txdma.dma_tag, txr->txdma.dma_map, 105259412Sluigi BUS_DMASYNC_POSTREAD); 106227614Sluigi 107259412Sluigi /* 108259412Sluigi * First part: process new packets to send. 109231778Sluigi */ 110227614Sluigi 111259412Sluigi nm_i = kring->nr_hwcur; 112260368Sluigi if (nm_i != head) { /* we have new packets to send */ 113259412Sluigi nic_i = netmap_idx_k2n(kring, nm_i); 114260368Sluigi for (n = 0; nm_i != head; n++) { 115259412Sluigi struct netmap_slot *slot = &ring->slot[nm_i]; 116259412Sluigi u_int len = slot->len; 117231778Sluigi uint64_t paddr; 118270063Sluigi void *addr = PNMB(na, slot, &paddr); 119227614Sluigi 120259412Sluigi /* device-specific */ 121259412Sluigi union e1000_adv_tx_desc *curr = 122259412Sluigi (union e1000_adv_tx_desc *)&txr->tx_base[nic_i]; 123259412Sluigi struct igb_tx_buf *txbuf = &txr->tx_buffers[nic_i]; 124259412Sluigi int flags = (slot->flags & NS_REPORT || 125259412Sluigi nic_i == 0 || nic_i == report_frequency) ? 126259412Sluigi E1000_ADVTXD_DCMD_RS : 0; 127227614Sluigi 128270063Sluigi NM_CHECK_ADDR_LEN(na, addr, len); 129259412Sluigi 130232238Sluigi if (slot->flags & NS_BUF_CHANGED) { 131232238Sluigi /* buffer has changed, reload map */ 132270063Sluigi netmap_reload_map(na, txr->txtag, txbuf->map, addr); 133232238Sluigi } 134259412Sluigi slot->flags &= ~(NS_REPORT | NS_BUF_CHANGED); 135259412Sluigi 136259412Sluigi /* Fill the slot in the NIC ring. */ 137229939Sluigi curr->read.buffer_addr = htole64(paddr); 138232238Sluigi // XXX check olinfo and cmd_type_len 139227614Sluigi curr->read.olinfo_status = 140227614Sluigi htole32(olinfo_status | 141227614Sluigi (len<< E1000_ADVTXD_PAYLEN_SHIFT)); 142227614Sluigi curr->read.cmd_type_len = 143227614Sluigi htole32(len | E1000_ADVTXD_DTYP_DATA | 144259412Sluigi E1000_ADVTXD_DCMD_IFCS | 145259412Sluigi E1000_ADVTXD_DCMD_DEXT | 146259412Sluigi E1000_ADVTXD_DCMD_EOP | flags); 147227614Sluigi 148259412Sluigi /* make sure changes to the buffer are synced */ 149227614Sluigi bus_dmamap_sync(txr->txtag, txbuf->map, 150227614Sluigi BUS_DMASYNC_PREWRITE); 151259412Sluigi 152259412Sluigi nm_i = nm_next(nm_i, lim); 153259412Sluigi nic_i = nm_next(nic_i, lim); 154227614Sluigi } 155260368Sluigi kring->nr_hwcur = head; 156227614Sluigi 157228276Sluigi /* Set the watchdog XXX ? */ 158227614Sluigi txr->queue_status = IGB_QUEUE_WORKING; 159227614Sluigi txr->watchdog_time = ticks; 160227614Sluigi 161259412Sluigi /* synchronize the NIC ring */ 162227614Sluigi bus_dmamap_sync(txr->txdma.dma_tag, txr->txdma.dma_map, 163259412Sluigi BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 164227614Sluigi 165259412Sluigi /* (re)start the tx unit up to slot nic_i (excluded) */ 166259412Sluigi E1000_WRITE_REG(&adapter->hw, E1000_TDT(txr->me), nic_i); 167227614Sluigi } 168231778Sluigi 169259412Sluigi /* 170259412Sluigi * Second part: reclaim buffers for completed transmissions. 171259412Sluigi */ 172260368Sluigi if (flags & NAF_FORCE_RECLAIM || nm_kr_txempty(kring)) { 173231778Sluigi /* record completed transmissions using TDH */ 174270063Sluigi nic_i = E1000_READ_REG(&adapter->hw, E1000_TDH(kring->ring_id)); 175343771Svmaffione if (unlikely(nic_i >= kring->nkr_num_slots)) { 176343771Svmaffione nm_prerr("TDH wrap at idx %d", nic_i); 177259412Sluigi nic_i -= kring->nkr_num_slots; 178231778Sluigi } 179260368Sluigi txr->next_to_clean = nic_i; 180260368Sluigi kring->nr_hwtail = nm_prev(netmap_idx_n2k(kring, nic_i), lim); 181228276Sluigi } 182231778Sluigi 183227614Sluigi return 0; 184227614Sluigi} 185227614Sluigi 186227614Sluigi 187227614Sluigi/* 188227614Sluigi * Reconcile kernel and user view of the receive ring. 189227614Sluigi */ 190227614Sluigistatic int 191270063Sluigiigb_netmap_rxsync(struct netmap_kring *kring, int flags) 192227614Sluigi{ 193270063Sluigi struct netmap_adapter *na = kring->na; 194259412Sluigi struct ifnet *ifp = na->ifp; 195227614Sluigi struct netmap_ring *ring = kring->ring; 196259412Sluigi u_int nm_i; /* index into the netmap ring */ 197259412Sluigi u_int nic_i; /* index into the NIC ring */ 198260368Sluigi u_int n; 199259412Sluigi u_int const lim = kring->nkr_num_slots - 1; 200285349Sluigi u_int const head = kring->rhead; 201257529Sluigi int force_update = (flags & NAF_FORCE_READ) || kring->nr_kflags & NKR_PENDINTR; 202227614Sluigi 203259412Sluigi /* device-specific */ 204259412Sluigi struct adapter *adapter = ifp->if_softc; 205270063Sluigi struct rx_ring *rxr = &adapter->rx_rings[kring->ring_id]; 206259412Sluigi 207260368Sluigi if (head > lim) 208227614Sluigi return netmap_ring_reinit(kring); 209227614Sluigi 210231778Sluigi /* XXX check sync modes */ 211227614Sluigi bus_dmamap_sync(rxr->rxdma.dma_tag, rxr->rxdma.dma_map, 212259412Sluigi BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 213227614Sluigi 214232238Sluigi /* 215259412Sluigi * First part: import newly received packets. 216231778Sluigi */ 217232238Sluigi if (netmap_no_pendintr || force_update) { 218259412Sluigi nic_i = rxr->next_to_check; 219259412Sluigi nm_i = netmap_idx_n2k(kring, nic_i); 220259412Sluigi 221232238Sluigi for (n = 0; ; n++) { 222259412Sluigi union e1000_adv_rx_desc *curr = &rxr->rx_base[nic_i]; 223232238Sluigi uint32_t staterr = le32toh(curr->wb.upper.status_error); 224227614Sluigi 225232238Sluigi if ((staterr & E1000_RXD_STAT_DD) == 0) 226232238Sluigi break; 227259412Sluigi ring->slot[nm_i].len = le16toh(curr->wb.upper.length); 228341477Svmaffione ring->slot[nm_i].flags = 0; 229232238Sluigi bus_dmamap_sync(rxr->ptag, 230259412Sluigi rxr->rx_buffers[nic_i].pmap, BUS_DMASYNC_POSTREAD); 231259412Sluigi nm_i = nm_next(nm_i, lim); 232259412Sluigi nic_i = nm_next(nic_i, lim); 233232238Sluigi } 234232238Sluigi if (n) { /* update the state variables */ 235259412Sluigi rxr->next_to_check = nic_i; 236260368Sluigi kring->nr_hwtail = nm_i; 237232238Sluigi } 238232238Sluigi kring->nr_kflags &= ~NKR_PENDINTR; 239227614Sluigi } 240232238Sluigi 241259412Sluigi /* 242259412Sluigi * Second part: skip past packets that userspace has released. 243259412Sluigi */ 244259412Sluigi nm_i = kring->nr_hwcur; 245260368Sluigi if (nm_i != head) { 246259412Sluigi nic_i = netmap_idx_k2n(kring, nm_i); 247260368Sluigi for (n = 0; nm_i != head; n++) { 248259412Sluigi struct netmap_slot *slot = &ring->slot[nm_i]; 249229939Sluigi uint64_t paddr; 250270063Sluigi void *addr = PNMB(na, slot, &paddr); 251227614Sluigi 252259412Sluigi union e1000_adv_rx_desc *curr = &rxr->rx_base[nic_i]; 253259412Sluigi struct igb_rx_buf *rxbuf = &rxr->rx_buffers[nic_i]; 254227614Sluigi 255270063Sluigi if (addr == NETMAP_BUF_BASE(na)) /* bad buf */ 256259412Sluigi goto ring_reset; 257259412Sluigi 258227614Sluigi if (slot->flags & NS_BUF_CHANGED) { 259259412Sluigi /* buffer has changed, reload map */ 260270063Sluigi netmap_reload_map(na, rxr->ptag, rxbuf->pmap, addr); 261227614Sluigi slot->flags &= ~NS_BUF_CHANGED; 262227614Sluigi } 263259412Sluigi curr->wb.upper.status_error = 0; 264232238Sluigi curr->read.pkt_addr = htole64(paddr); 265227614Sluigi bus_dmamap_sync(rxr->ptag, rxbuf->pmap, 266259412Sluigi BUS_DMASYNC_PREREAD); 267259412Sluigi nm_i = nm_next(nm_i, lim); 268259412Sluigi nic_i = nm_next(nic_i, lim); 269227614Sluigi } 270260368Sluigi kring->nr_hwcur = head; 271259412Sluigi 272227614Sluigi bus_dmamap_sync(rxr->rxdma.dma_tag, rxr->rxdma.dma_map, 273259412Sluigi BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 274231778Sluigi /* 275231778Sluigi * IMPORTANT: we must leave one free slot in the ring, 276259412Sluigi * so move nic_i back by one unit 277227614Sluigi */ 278260368Sluigi nic_i = nm_prev(nic_i, lim); 279259412Sluigi E1000_WRITE_REG(&adapter->hw, E1000_RDT(rxr->me), nic_i); 280227614Sluigi } 281259412Sluigi 282227614Sluigi return 0; 283259412Sluigi 284259412Sluigiring_reset: 285259412Sluigi return netmap_ring_reinit(kring); 286227614Sluigi} 287232238Sluigi 288232238Sluigi 289232238Sluigistatic void 290232238Sluigiigb_netmap_attach(struct adapter *adapter) 291232238Sluigi{ 292232238Sluigi struct netmap_adapter na; 293232238Sluigi 294232238Sluigi bzero(&na, sizeof(na)); 295232238Sluigi 296232238Sluigi na.ifp = adapter->ifp; 297257529Sluigi na.na_flags = NAF_BDG_MAYSLEEP; 298232238Sluigi na.num_tx_desc = adapter->num_tx_desc; 299232238Sluigi na.num_rx_desc = adapter->num_rx_desc; 300232238Sluigi na.nm_txsync = igb_netmap_txsync; 301232238Sluigi na.nm_rxsync = igb_netmap_rxsync; 302232238Sluigi na.nm_register = igb_netmap_reg; 303259412Sluigi na.num_tx_rings = na.num_rx_rings = adapter->num_queues; 304259412Sluigi netmap_attach(&na); 305259412Sluigi} 306259412Sluigi 307231778Sluigi/* end of file */ 308