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8221c5eba8
linux/drivers
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Björn Töpel 8221c5eba8 ixgbe: 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
ixgbe_xsk.c.

Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Tested-by: William Tu <u9012063@gmail.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-10-03 12:54:37 -07:00
..
accessibility
acpi Merge branch 'acpi-bus' 2018-09-07 10:05:20 +02:00
amba
android android: binder: fix the race mmap and alloc_new_buf_locked 2018-09-12 09:18:29 +02:00
ata for-linus-20180920 2018-09-21 09:41:05 +02:00
atm
auxdisplay Char/Misc driver patches for 4.19-rc1 2018-08-18 11:04:51 -07:00
base firmware: Fix security issue with request_firmware_into_buf() 2018-09-12 09:31:00 +02:00
bcma
block for-linus-20180920 2018-09-21 09:41:05 +02:00
bluetooth Bluetooth: ath3k: add more information to error message 2018-09-28 19:27:50 +02:00
bus Merge branch 'perm-fix' into omap-for-v4.19/fixes-v2 2018-08-28 09:58:03 -07:00
cdrom cdrom: Fix info leak/OOB read in cdrom_ioctl_drive_status 2018-08-29 08:09:20 -06:00
char A few fixes that came around or after the merge window, except 2018-09-12 19:33:56 -10:00
clk clk: x86: Stop marking clocks as CLK_IS_CRITICAL 2018-09-17 18:47:58 -07:00
clocksource RISC-V Updates for the 4.19 Merge Window 2018-08-19 09:56:38 -07:00
connector
cpufreq ARM: SoC driver updates 2018-08-23 13:52:46 -07:00
cpuidle cpuidle: menu: Retain tick when shallow state is selected 2018-08-25 13:16:08 +02:00
crypto crypto: ccp - add timeout support in the SEV command 2018-09-13 13:27:43 +08:00
dax drivers/dax/device.c: convert variable to vm_fault_t type 2018-09-04 16:45:02 -07:00
dca
devfreq Char/Misc driver patches for 4.19-rc1 2018-08-18 11:04:51 -07:00
dio
dma dmaengine: mic_x100_dma: use devm_kzalloc to fix an issue 2018-08-27 11:16:04 +05:30
dma-buf
edac EDAC: Add missing MEM_LRDDR4 entry in edac_mem_types[] 2018-08-17 15:13:34 +02:00
eisa
extcon
firewire firewire: use 64-bit time_t based interfaces 2018-08-17 16:20:27 -07:00
firmware efi/libstub/arm: default EFI_ARMSTUB_DTB_LOADER to y 2018-09-12 16:41:41 +02:00
fmc
fpga fpga: dfl: fme: fix return value check in in pr_mgmt_init() 2018-09-12 09:31:00 +02:00
fsi fsi: sbefifo: Bump max command length 2018-08-08 15:44:47 +10:00
gnss
gpio gpio: Fix crash due to registration race 2018-08-31 11:30:45 +02:00
gpu amdgpu, vwmgfx, i915, sun4i, vgem, vc4, udl and core fixes. 2018-09-21 09:11:18 +02:00
hid HID: i2c-hid: Don't reset device upon system resume 2018-09-06 16:30:53 +02:00
hsi
hv vmbus: don't return values for uninitalized channels 2018-09-12 09:31:00 +02:00
hwmon Various bug fixes for nct6775 driver 2018-09-19 22:59:30 +02:00
hwspinlock hwspinlock: Fix incorrect return pointers 2018-07-30 20:54:51 -07:00
hwtracing intel_th: pci: Add Ice Lake PCH support 2018-09-18 16:08:38 +02:00
i2c i2c: xiic: Make the start and the byte count write atomic 2018-09-06 20:49:09 +02:00
ide Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide 2018-08-22 07:40:33 -07:00
idle
iio First set of IIO fixes for the 4.19 cycle. 2018-09-09 09:33:29 +02:00
infiniband Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net 2018-09-18 09:33:27 -07:00
input ARM: 32-bit SoC platform updates 2018-08-23 13:44:43 -07:00
iommu ARM: SoC: late updates 2018-08-25 14:12:36 -07:00
ipack
irqchip irqchip/gic-v3-its: Cap lpi_id_bits to reduce memory footprint 2018-09-06 20:31:59 +02:00
isdn isdn/hisax: Fix fall-through annotation 2018-10-02 11:22:09 -07:00
leds leds: ns2: Change unsigned to unsigned int 2018-08-06 23:03:12 +02:00
lightnvm
macintosh macintosh: therm_windtunnel: drop using attach_adapter 2018-08-24 14:42:42 +02:00
mailbox mailbox: Add support for i.MX messaging unit 2018-08-15 09:53:07 +05:30
mcb
md - DM verity fix for crash due to using vmalloc'd buffers with the 2018-09-13 19:12:55 -10:00
media media: platform: fix cros-ec-cec build error 2018-09-17 14:32:29 -04:00
memory memory: ti-aemif: fix a potential NULL-pointer dereference 2018-09-06 10:04:07 -07:00
memstick
message scsi: message: fusion: Replace GFP_ATOMIC with GFP_KERNEL 2018-07-30 23:17:53 -04:00
mfd mfd: omap-usb-host: Fix dts probe of children 2018-09-11 16:47:33 +01:00
misc misc: hmc6352: fix potential Spectre v1 2018-09-12 09:31:00 +02:00
mmc mmc: meson-mx-sdio: fix OF child-node lookup 2018-09-05 08:28:45 +02:00
mtd mtd: devices: m25p80: Make sure the buffer passed in op is DMA-able 2018-09-18 10:17:48 +02:00
mux mux: adgs1408: new driver for Analog Devices ADGS1408/1409 mux 2018-08-02 10:23:02 +02:00
net ixgbe: add AF_XDP zero-copy Tx support 2018-10-03 12:54:37 -07:00
nfc
ntb
nubus
nvdimm libnvdimm-for-4.19_dax-memory-failure 2018-08-25 18:43:59 -07:00
nvme nvme: count all ANA groups for ANA Log page 2018-09-17 15:49:40 +02:00
nvmem
of Devicetree fixes for 4.19, part 2: 2018-09-14 13:03:17 -10:00
opp
oprofile
parisc
parport Char/Misc driver patches for 4.19-rc1 2018-08-18 11:04:51 -07:00
pci PCI: hv: Fix return value check in hv_pci_assign_slots() 2018-09-21 19:13:22 -07:00
pcmcia pcmcia: remove long deprecated pcmcia_request_exclusive_irq() function 2018-08-18 12:30:42 -07:00
perf Char/Misc driver patches for 4.19-rc1 2018-08-18 11:04:51 -07:00
phy Merge 4.18-rc7 into usb-next 2018-07-30 10:04:58 +02:00
pinctrl pinctrl: intel: Do pin translation in other GPIO operations as well 2018-09-20 08:21:52 -07:00
platform platform/x86: alienware-wmi: Correct a memory leak 2018-09-10 13:45:43 -07:00
pnp
power treewide: convert ISO_8859-1 text comments to utf-8 2018-08-23 18:48:43 -07:00
powercap
pps
ps3
ptp Char/Misc driver patches for 4.19-rc1 2018-08-18 11:04:51 -07:00
pwm pwm: mediatek: Add MT7628 support 2018-08-20 11:36:07 +02:00
rapidio drivers/rapidio/devices/rio_mport_cdev.c: remove redundant pointer md 2018-08-22 10:52:51 -07:00
ras
regulator - New Drivers 2018-08-20 15:38:44 -07:00
remoteproc remoteproc/davinci: use the reset framework 2018-08-16 17:39:55 -07:00
reset ARM: SoC: late updates 2018-08-25 14:12:36 -07:00
rpmsg rpmsg: Add compat ioctl for rpmsg char driver 2018-07-30 23:40:23 -07:00
rtc RTC for 4.19 2018-08-20 16:30:27 -07:00
s390 s390/qeth: remove duplicated carrier state tracking 2018-09-26 09:56:08 -07:00
sbus
scsi Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net 2018-09-25 10:35:29 -07:00
sfi
sh sh: introduce a sh_cacheop_vaddr helper 2018-08-02 13:54:06 +02:00
siox
slimbus
sn
soc ARM: Device-tree updates 2018-08-23 14:02:22 -07:00
soundwire soundwire: Fix acquiring bus lock twice during master release 2018-08-27 09:49:48 +05:30
spi spi: Fixes for v4.19 2018-09-17 22:34:25 +02:00
spmi
ssb ssb: Remove SSB_WARN_ON, SSB_BUG_ON and SSB_DEBUG 2018-08-09 18:47:47 +03:00
staging Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net 2018-09-25 10:35:29 -07:00
target scsi: target: iscsi: Use bin2hex instead of a re-implementation 2018-09-21 12:32:30 -04:00
tc
tee ARM: SoC driver updates 2018-08-23 13:52:46 -07:00
thermal Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal 2018-08-28 16:11:34 -07:00
thunderbolt
tty serial: imx: restore handshaking irq for imx1 2018-09-20 14:51:31 +02:00
uio Char/Misc fix for 4.19-rc1 2018-08-19 09:30:44 -07:00
usb usb: typec: mux: Take care of driver module reference counting 2018-09-20 13:35:01 +02:00
uwb
vfio powerpc updates for 4.19 2018-08-17 11:32:50 -07:00
vhost net: vhost: add rx busy polling in tx path 2018-09-26 20:25:55 -07:00
video fbdev changes for v4.19: 2018-08-23 15:44:58 -07:00
virt
virtio virtio, vhost: fixes, tweaks 2018-08-24 08:45:19 -07:00
visorbus
vlynq
vme
w1 power supply and reset changes for the v4.19 series 2018-08-21 18:06:27 -07:00
watchdog include/linux/compiler*.h: make compiler-*.h mutually exclusive 2018-08-22 17:31:34 -07:00
xen xen: issue warning message when out of grant maptrack entries 2018-09-19 11:27:42 -04:00
zorro
Kconfig
Makefile Char/Misc driver patches for 4.19-rc1 2018-08-18 11:04:51 -07:00