718cf2ccb9
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
332 lines
9.4 KiB
C
332 lines
9.4 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (C) 2011-2014 Matteo Landi, 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: em.
|
|
*
|
|
* 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>
|
|
|
|
|
|
// XXX do we need to block/unblock the tasks ?
|
|
static void
|
|
em_netmap_block_tasks(struct adapter *adapter)
|
|
{
|
|
if (adapter->msix > 1) { /* MSIX */
|
|
int i;
|
|
struct tx_ring *txr = adapter->tx_rings;
|
|
struct rx_ring *rxr = adapter->rx_rings;
|
|
|
|
for (i = 0; i < adapter->num_queues; i++, txr++, rxr++) {
|
|
taskqueue_block(txr->tq);
|
|
taskqueue_drain(txr->tq, &txr->tx_task);
|
|
taskqueue_block(rxr->tq);
|
|
taskqueue_drain(rxr->tq, &rxr->rx_task);
|
|
}
|
|
} else { /* legacy */
|
|
taskqueue_block(adapter->tq);
|
|
taskqueue_drain(adapter->tq, &adapter->link_task);
|
|
taskqueue_drain(adapter->tq, &adapter->que_task);
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
em_netmap_unblock_tasks(struct adapter *adapter)
|
|
{
|
|
if (adapter->msix > 1) {
|
|
struct tx_ring *txr = adapter->tx_rings;
|
|
struct rx_ring *rxr = adapter->rx_rings;
|
|
int i;
|
|
|
|
for (i = 0; i < adapter->num_queues; i++, txr++, rxr++) {
|
|
taskqueue_unblock(txr->tq);
|
|
taskqueue_unblock(rxr->tq);
|
|
}
|
|
} else { /* legacy */
|
|
taskqueue_unblock(adapter->tq);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Register/unregister. We are already under netmap lock.
|
|
*/
|
|
static int
|
|
em_netmap_reg(struct netmap_adapter *na, int onoff)
|
|
{
|
|
struct ifnet *ifp = na->ifp;
|
|
struct adapter *adapter = ifp->if_softc;
|
|
|
|
EM_CORE_LOCK(adapter);
|
|
em_disable_intr(adapter);
|
|
|
|
/* Tell the stack that the interface is no longer active */
|
|
ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
|
|
|
|
em_netmap_block_tasks(adapter);
|
|
/* enable or disable flags and callbacks in na and ifp */
|
|
if (onoff) {
|
|
nm_set_native_flags(na);
|
|
} else {
|
|
nm_clear_native_flags(na);
|
|
}
|
|
em_init_locked(adapter); /* also enable intr */
|
|
em_netmap_unblock_tasks(adapter);
|
|
EM_CORE_UNLOCK(adapter);
|
|
return (ifp->if_drv_flags & IFF_DRV_RUNNING ? 0 : 1);
|
|
}
|
|
|
|
|
|
/*
|
|
* Reconcile kernel and user view of the transmit ring.
|
|
*/
|
|
static int
|
|
em_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;
|
|
/* generate an interrupt approximately every half ring */
|
|
u_int report_frequency = kring->nkr_num_slots >> 1;
|
|
|
|
/* device-specific */
|
|
struct adapter *adapter = ifp->if_softc;
|
|
struct tx_ring *txr = &adapter->tx_rings[kring->ring_id];
|
|
|
|
bus_dmamap_sync(txr->txdma.dma_tag, txr->txdma.dma_map,
|
|
BUS_DMASYNC_POSTREAD);
|
|
|
|
/*
|
|
* First part: process new packets to send.
|
|
*/
|
|
|
|
nm_i = kring->nr_hwcur;
|
|
if (nm_i != head) { /* we have new packets to send */
|
|
nic_i = 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 e1000_tx_desc *curr = &txr->tx_base[nic_i];
|
|
struct em_txbuffer *txbuf = &txr->tx_buffers[nic_i];
|
|
int flags = (slot->flags & NS_REPORT ||
|
|
nic_i == 0 || nic_i == report_frequency) ?
|
|
E1000_TXD_CMD_RS : 0;
|
|
|
|
NM_CHECK_ADDR_LEN(na, addr, len);
|
|
|
|
if (slot->flags & NS_BUF_CHANGED) {
|
|
curr->buffer_addr = htole64(paddr);
|
|
/* buffer has changed, reload map */
|
|
netmap_reload_map(na, txr->txtag, txbuf->map, addr);
|
|
}
|
|
slot->flags &= ~(NS_REPORT | NS_BUF_CHANGED);
|
|
|
|
/* Fill the slot in the NIC ring. */
|
|
curr->upper.data = 0;
|
|
curr->lower.data = htole32(adapter->txd_cmd | len |
|
|
(E1000_TXD_CMD_EOP | flags) );
|
|
bus_dmamap_sync(txr->txtag, txbuf->map,
|
|
BUS_DMASYNC_PREWRITE);
|
|
|
|
nm_i = nm_next(nm_i, lim);
|
|
nic_i = nm_next(nic_i, lim);
|
|
}
|
|
kring->nr_hwcur = head;
|
|
|
|
/* synchronize the NIC ring */
|
|
bus_dmamap_sync(txr->txdma.dma_tag, txr->txdma.dma_map,
|
|
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
|
|
|
|
/* (re)start the tx unit up to slot nic_i (excluded) */
|
|
E1000_WRITE_REG(&adapter->hw, E1000_TDT(txr->me), nic_i);
|
|
}
|
|
|
|
/*
|
|
* Second part: reclaim buffers for completed transmissions.
|
|
*/
|
|
if (flags & NAF_FORCE_RECLAIM || nm_kr_txempty(kring)) {
|
|
/* record completed transmissions using TDH */
|
|
nic_i = E1000_READ_REG(&adapter->hw, E1000_TDH(kring->ring_id));
|
|
if (nic_i >= kring->nkr_num_slots) { /* XXX can it happen ? */
|
|
D("TDH wrap %d", nic_i);
|
|
nic_i -= kring->nkr_num_slots;
|
|
}
|
|
if (nic_i != txr->next_to_clean) {
|
|
txr->next_to_clean = nic_i;
|
|
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
|
|
em_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 adapter *adapter = ifp->if_softc;
|
|
struct rx_ring *rxr = &adapter->rx_rings[kring->ring_id];
|
|
|
|
if (head > lim)
|
|
return netmap_ring_reinit(kring);
|
|
|
|
/* XXX check sync modes */
|
|
bus_dmamap_sync(rxr->rxdma.dma_tag, rxr->rxdma.dma_map,
|
|
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
|
|
|
|
/*
|
|
* First part: import newly received packets.
|
|
*/
|
|
if (netmap_no_pendintr || force_update) {
|
|
uint16_t slot_flags = kring->nkr_slot_flags;
|
|
|
|
nic_i = rxr->next_to_check;
|
|
nm_i = netmap_idx_n2k(kring, nic_i);
|
|
|
|
for (n = 0; ; n++) { // XXX no need to count
|
|
union e1000_rx_desc_extended *curr = &rxr->rx_base[nic_i];
|
|
uint32_t staterr = le32toh(curr->wb.upper.status_error);
|
|
|
|
if ((staterr & E1000_RXD_STAT_DD) == 0)
|
|
break;
|
|
ring->slot[nm_i].len = le16toh(curr->wb.upper.length);
|
|
ring->slot[nm_i].flags = slot_flags;
|
|
bus_dmamap_sync(rxr->rxtag, rxr->rx_buffers[nic_i].map,
|
|
BUS_DMASYNC_POSTREAD);
|
|
nm_i = nm_next(nm_i, lim);
|
|
/* make sure next_to_refresh follows next_to_check */
|
|
rxr->next_to_refresh = nic_i; // XXX
|
|
nic_i = nm_next(nic_i, lim);
|
|
}
|
|
if (n) { /* update the state variables */
|
|
rxr->next_to_check = 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);
|
|
|
|
union e1000_rx_desc_extended *curr = &rxr->rx_base[nic_i];
|
|
struct em_rxbuffer *rxbuf = &rxr->rx_buffers[nic_i];
|
|
|
|
if (addr == NETMAP_BUF_BASE(na)) /* bad buf */
|
|
goto ring_reset;
|
|
|
|
curr->read.buffer_addr = htole64(paddr);
|
|
if (slot->flags & NS_BUF_CHANGED) {
|
|
/* buffer has changed, reload map */
|
|
netmap_reload_map(na, rxr->rxtag, rxbuf->map, addr);
|
|
slot->flags &= ~NS_BUF_CHANGED;
|
|
}
|
|
curr->wb.upper.status_error = 0;
|
|
bus_dmamap_sync(rxr->rxtag, rxbuf->map,
|
|
BUS_DMASYNC_PREREAD);
|
|
nm_i = nm_next(nm_i, lim);
|
|
nic_i = nm_next(nic_i, lim);
|
|
}
|
|
kring->nr_hwcur = head;
|
|
|
|
bus_dmamap_sync(rxr->rxdma.dma_tag, rxr->rxdma.dma_map,
|
|
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
|
|
/*
|
|
* IMPORTANT: we must leave one free slot in the ring,
|
|
* so move nic_i back by one unit
|
|
*/
|
|
nic_i = nm_prev(nic_i, lim);
|
|
E1000_WRITE_REG(&adapter->hw, E1000_RDT(rxr->me), nic_i);
|
|
}
|
|
|
|
return 0;
|
|
|
|
ring_reset:
|
|
return netmap_ring_reinit(kring);
|
|
}
|
|
|
|
|
|
static void
|
|
em_netmap_attach(struct adapter *adapter)
|
|
{
|
|
struct netmap_adapter na;
|
|
|
|
bzero(&na, sizeof(na));
|
|
|
|
na.ifp = adapter->ifp;
|
|
na.na_flags = NAF_BDG_MAYSLEEP;
|
|
na.num_tx_desc = adapter->num_tx_desc;
|
|
na.num_rx_desc = adapter->num_rx_desc;
|
|
na.nm_txsync = em_netmap_txsync;
|
|
na.nm_rxsync = em_netmap_rxsync;
|
|
na.nm_register = em_netmap_reg;
|
|
na.num_tx_rings = na.num_rx_rings = adapter->num_queues;
|
|
netmap_attach(&na);
|
|
}
|
|
|
|
/* end of file */
|