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Add TX checksum offload supports for ixl(4)

This commit is contained in:
yamaguchi 2020-01-27 09:40:43 +00:00
parent ef64510dd2
commit c39f1292af
1 changed files with 92 additions and 12 deletions
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104
sys/dev/pci/if_ixl.c
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@ -1,4 +1,4 @@
/* $NetBSD: if_ixl.c,v 1.27 2020/01/27 08:40:46 yamaguchi Exp $ */
/* $NetBSD: if_ixl.c,v 1.28 2020/01/27 09:40:43 yamaguchi Exp $ */
/*
* Copyright (c) 2013-2015, Intel Corporation
@ -104,6 +104,9 @@
#include <net/if_ether.h>
#include <net/rss_config.h>
#include <netinet/tcp.h> /* for struct tcphdr */
#include <netinet/udp.h> /* for struct udphdr */
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>
@ -704,11 +707,19 @@ struct ixl_softc {
#define IXL_TX_INTR_PROCESS_LIMIT 256
#define IXL_RX_INTR_PROCESS_LIMIT 0U
#define IXL_IFCAP_RXCSUM (IFCAP_CSUM_IPv4_Rx| \
IFCAP_CSUM_TCPv4_Rx| \
IFCAP_CSUM_UDPv4_Rx| \
IFCAP_CSUM_TCPv6_Rx| \
#define IXL_IFCAP_RXCSUM (IFCAP_CSUM_IPv4_Rx | \
IFCAP_CSUM_TCPv4_Rx | \
IFCAP_CSUM_UDPv4_Rx | \
IFCAP_CSUM_TCPv6_Rx | \
IFCAP_CSUM_UDPv6_Rx)
#define IXL_IFCAP_TXCSUM (IFCAP_CSUM_IPv4_Tx | \
IFCAP_CSUM_TCPv4_Tx | \
IFCAP_CSUM_UDPv4_Tx | \
IFCAP_CSUM_TCPv6_Tx | \
IFCAP_CSUM_UDPv6_Tx)
#define IXL_CSUM_ALL_OFFLOAD (M_CSUM_IPv4 | \
M_CSUM_TCPv4 | M_CSUM_TCPv6 | \
M_CSUM_UDPv4 | M_CSUM_UDPv6)
#define delaymsec(_x) DELAY(1000 * (_x))
#ifdef IXL_DEBUG
@ -1340,8 +1351,9 @@ ixl_attach(device_t parent, device_t self, void *aux)
IFQ_SET_MAXLEN(&ifp->if_snd, sc->sc_tx_ring_ndescs);
IFQ_SET_READY(&ifp->if_snd);
ifp->if_capabilities |= IXL_IFCAP_RXCSUM;
ifp->if_capabilities |= IXL_IFCAP_TXCSUM;
#if 0
ifp->if_capabilities |= IFCAP_CSUM_TCPv4_Tx | IFCAP_CSUM_UDPv4_Tx;
ifp->if_capabilities |= IFCAP_TSOv4 | IFCAP_TSOv6;
#endif
ether_set_vlan_cb(&sc->sc_ec, ixl_vlan_cb);
sc->sc_ec.ec_capabilities |= ETHERCAP_VLAN_MTU;
@ -2548,6 +2560,71 @@ ixl_load_mbuf(bus_dma_tag_t dmat, bus_dmamap_t map, struct mbuf **m0,
return error;
}
static inline int
ixl_tx_setup_offloads(struct mbuf *m, uint64_t *cmd_txd)
{
struct ether_header *eh;
size_t len;
uint64_t cmd;
cmd = 0;
eh = mtod(m, struct ether_header *);
switch (htons(eh->ether_type)) {
case ETHERTYPE_IP:
case ETHERTYPE_IPV6:
len = ETHER_HDR_LEN;
break;
case ETHERTYPE_VLAN:
len = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN;
break;
default:
len = 0;
}
cmd |= ((len >> 1) << IXL_TX_DESC_MACLEN_SHIFT);
if (m->m_pkthdr.csum_flags &
(M_CSUM_TSOv4 | M_CSUM_TCPv4 | M_CSUM_UDPv4)) {
cmd |= IXL_TX_DESC_CMD_IIPT_IPV4;
}
if (m->m_pkthdr.csum_flags & M_CSUM_IPv4) {
cmd |= IXL_TX_DESC_CMD_IIPT_IPV4_CSUM;
}
if (m->m_pkthdr.csum_flags &
(M_CSUM_TSOv6 | M_CSUM_TCPv6 | M_CSUM_UDPv6)) {
cmd |= IXL_TX_DESC_CMD_IIPT_IPV6;
}
switch (cmd & IXL_TX_DESC_CMD_IIPT_MASK) {
case IXL_TX_DESC_CMD_IIPT_IPV4:
case IXL_TX_DESC_CMD_IIPT_IPV4_CSUM:
len = M_CSUM_DATA_IPv4_IPHL(m->m_pkthdr.csum_data);
break;
case IXL_TX_DESC_CMD_IIPT_IPV6:
len = M_CSUM_DATA_IPv6_IPHL(m->m_pkthdr.csum_data);
break;
default:
len = 0;
}
cmd |= ((len >> 2) << IXL_TX_DESC_IPLEN_SHIFT);
if (m->m_pkthdr.csum_flags &
(M_CSUM_TSOv4 | M_CSUM_TSOv6 | M_CSUM_TCPv4 | M_CSUM_TCPv6)) {
len = sizeof(struct tcphdr);
cmd |= IXL_TX_DESC_CMD_L4T_EOFT_TCP;
} else if (m->m_pkthdr.csum_flags & (M_CSUM_UDPv4 | M_CSUM_UDPv6)) {
len = sizeof(struct udphdr);
cmd |= IXL_TX_DESC_CMD_L4T_EOFT_UDP;
} else {
len = 0;
}
cmd |= ((len >> 2) << IXL_TX_DESC_L4LEN_SHIFT);
*cmd_txd |= cmd;
return 0;
}
static void
ixl_tx_common_locked(struct ifnet *ifp, struct ixl_tx_ring *txr,
bool is_transmit)
@ -2557,7 +2634,7 @@ ixl_tx_common_locked(struct ifnet *ifp, struct ixl_tx_ring *txr,
struct ixl_tx_map *txm;
bus_dmamap_t map;
struct mbuf *m;
uint64_t cmd, cmd_vlan;
uint64_t cmd, cmd_txd;
unsigned int prod, free, last, i;
unsigned int mask;
int post = 0;
@ -2611,12 +2688,15 @@ ixl_tx_common_locked(struct ifnet *ifp, struct ixl_tx_ring *txr,
continue;
}
cmd_txd = 0;
if (m->m_pkthdr.csum_flags & IXL_CSUM_ALL_OFFLOAD) {
ixl_tx_setup_offloads(m, &cmd_txd);
}
if (vlan_has_tag(m)) {
cmd_vlan = (uint64_t)vlan_get_tag(m) <<
cmd_txd |= (uint64_t)vlan_get_tag(m) <<
IXL_TX_DESC_L2TAG1_SHIFT;
cmd_vlan |= IXL_TX_DESC_CMD_IL2TAG1;
} else {
cmd_vlan = 0;
cmd_txd |= IXL_TX_DESC_CMD_IL2TAG1;
}
bus_dmamap_sync(sc->sc_dmat, map, 0,
@ -2628,7 +2708,7 @@ ixl_tx_common_locked(struct ifnet *ifp, struct ixl_tx_ring *txr,
cmd = (uint64_t)map->dm_segs[i].ds_len <<
IXL_TX_DESC_BSIZE_SHIFT;
cmd |= IXL_TX_DESC_DTYPE_DATA | IXL_TX_DESC_CMD_ICRC;
cmd |= cmd_vlan;
cmd |= cmd_txd;
txd->addr = htole64(map->dm_segs[i].ds_addr);
txd->cmd = htole64(cmd);