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1328dcddbd
linux/drivers/net/ethernet
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Magnus Karlsson 1328dcddbd i40e: add AF_XDP zero-copy Tx support 
This patch adds zero-copy Tx support for AF_XDP sockets. It implements
the ndo_xsk_async_xmit netdev ndo and performs all the Tx logic from a
NAPI context. This means pulling egress packets from the Tx ring,
placing the frames on the NIC HW descriptor ring and completing sent
frames back to the application via the completion ring.

The regular XDP Tx ring is used for AF_XDP as well. This rationale for
this is as follows: XDP_REDIRECT guarantees mutual exclusion between
different NAPI contexts based on CPU id. In other words, a netdev can
XDP_REDIRECT to another netdev with a different NAPI context, since
the operation is bound to a specific core and each core has its own
hardware ring.

As the AF_XDP Tx action is running in the same NAPI context and using
the same ring, it will also be protected from XDP_REDIRECT actions
with the exact same mechanism.

As with AF_XDP Rx, all AF_XDP Tx specific functions are added to
i40e_xsk.c.

Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-08-29 12:25:53 -07:00
..
3com net: prevent ISA drivers from building on PPC32 2018-07-22 11:12:29 -07:00
8390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2018-08-15 15:04:25 -07:00
adaptec net: adaptec: Replace mdelay() with msleep() in starfire_init_one() 2018-07-26 21:24:23 -07:00
aeroflex
agere
alacritech
allwinner
alteon alteon: acenic: mark expected switch fall-through 2018-08-07 17:54:19 -07:00
altera
amazon Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net 2018-08-02 10:55:32 -07:00
amd Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2018-08-15 16:01:47 -07:00
apm ACPI: Convert ACPI reference args to generic fwnode reference args 2018-07-23 12:44:52 +02:00
apple net: ethernet: Use existing define with polynomial 2018-07-27 19:16:37 +08:00
aquantia Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net 2018-08-09 11:52:36 -07:00
arc
atheros Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net 2018-07-24 19:21:58 -07:00
aurora
broadcom net_sched: remove list_head from tc_action 2018-08-21 12:45:44 -07:00
brocade
cadence net: macb: do not disable MDIO bus at open/close time 2018-08-25 17:34:48 -07:00
calxeda Merge 4.18-rc5 into char-misc-next 2018-07-16 09:04:54 +02:00
cavium liquidio: remove set but not used variable 'is25G' 2018-08-13 09:21:05 -07:00
chelsio net_sched: remove list_head from tc_action 2018-08-21 12:45:44 -07:00
cirrus net: prevent ISA drivers from building on PPC32 2018-07-22 11:12:29 -07:00
cisco net: cisco: enic: Replace GFP_ATOMIC with GFP_KERNEL 2018-08-04 13:08:06 -07:00
cortina net: gemini: Indicate that we can handle jumboframes 2018-07-12 17:39:15 -07:00
davicom
dec net: tulip: de4x5: mark expected switch fall-throughs 2018-08-07 17:54:19 -07:00
dlink
emulex be2net: Use Kconfig flag to support for enabling/disabling adapters 2018-08-09 14:08:59 -07:00
ezchip
faraday
freescale Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2018-08-15 16:01:47 -07:00
fujitsu
hisilicon net: hns3: modify variable type in hns3_nic_reuse_page 2018-08-22 21:55:01 -07:00
hp
huawei net-next: hinic: fix a problem in free_tx_poll() 2018-08-08 09:46:08 -07:00
i825xx
ibm ibmvnic: Update firmware error reporting with cause string 2018-08-07 12:46:27 -07:00
intel i40e: add AF_XDP zero-copy Tx support 2018-08-29 12:25:53 -07:00
marvell net: mvneta: fix mvneta_config_rss on armada 3700 2018-08-10 14:40:11 -07:00
mediatek net-next: mediatek: cleanup unnecessary get chip id and its user 2018-07-29 13:15:57 -07:00
mellanox mlxsw: spectrum_switchdev: Do not leak RIFs when removing bridge 2018-08-25 16:28:20 -07:00
micrel Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2018-08-15 16:01:47 -07:00
microchip net: lan743x_ptp: convert to ktime_get_clocktai_ts64 2018-08-19 10:56:40 -07:00
moxa
mscc net: mscc: simplify retrieving the tag type from the frame header 2018-07-16 13:43:31 -07:00
myricom
natsemi
neterion vxge: remove set but not used variable 'req_out', 'status' and 'ret' 2018-08-11 12:05:19 -07:00
netronome nfp: make RTsym users handle absolute symbols correctly 2018-08-28 16:01:47 -07:00
ni net: nixge: Don't store skb in app4 field of descriptor 2018-08-13 08:49:37 -07:00
nuvoton
nvidia net: nvidia: forcedeth: Replace GFP_ATOMIC with GFP_KERNEL in nv_probe() 2018-07-27 13:45:14 -07:00
nxp
oki-semi
packetengines
pasemi
qlogic qed: fix spelling mistake "comparsion" -> "comparison" 2018-08-25 17:41:09 -07:00
qualcomm Merge ra.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux 2018-07-20 21:17:12 -07:00
rdc
realtek r8169: don't use MSI-X on RTL8106e 2018-08-19 11:01:09 -07:00
renesas net: ethernet: renesas: use SPDX identifier for Renesas drivers 2018-08-22 21:37:27 -07:00
rocker
samsung net: ethernet: sxgbe: mark expected switch fall-throughs 2018-08-07 17:54:20 -07:00
seeq
sfc net: sfc: falcon: mark expected switch fall-through 2018-08-07 17:54:21 -07:00
sgi
silan
sis
smsc ARM: 32-bit SoC platform updates 2018-08-23 13:44:43 -07:00
socionext net: socionext: Increase descriptors to 256 2018-08-11 12:11:36 -07:00
stmicro Revert "net: stmmac: fix build failure due to missing COMMON_CLK dependency" 2018-08-25 17:32:33 -07:00
sun
synopsys net: ethernet: Use existing define with polynomial 2018-07-27 19:16:37 +08:00
tehuti
ti Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net 2018-08-11 17:52:00 -07:00
toshiba
tundra
via
wiznet
xilinx Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net 2018-07-24 19:21:58 -07:00
xircom
xscale
dnet.c
dnet.h
ec_bhf.c
ethoc.c
fealnx.c
jme.c net: jme: Replace mdelay() with msleep() and usleep_range() in jme_wait_link() 2018-07-27 13:45:14 -07:00
jme.h
Kconfig net: change Exar/Neterion menu items to be alphabetical 2018-08-01 09:49:02 -07:00
korina.c
lantiq_etop.c
Makefile net: change Exar/Neterion menu items to be alphabetical 2018-08-01 09:49:02 -07:00
netx-eth.c