OpenCloudOS-Kernel/drivers
Praveen Kaligineedi fd8e40321a gve: Add AF_XDP zero-copy support for GQI-QPL format
Adding AF_XDP zero-copy support.

Note: Although these changes support AF_XDP socket in zero-copy
mode, there is still a copy happening within the driver between
XSK buffer pool and QPL bounce buffers in GQI-QPL format.
In GQI-QPL queue format, the driver needs to allocate a fixed size
memory, the size specified by vNIC device, for RX/TX and register this
memory as a bounce buffer with the vNIC device when a queue is
created. The number of pages in the bounce buffer is limited and the
pages need to be made available to the vNIC by copying the RX data out
to prevent head-of-line blocking. Therefore, we cannot pass the XSK
buffer pool to the vNIC.

The number of copies on RX path from the bounce buffer to XSK buffer is 2
for AF_XDP copy mode (bounce buffer -> allocated page frag -> XSK buffer)
and 1 for AF_XDP zero-copy mode (bounce buffer -> XSK buffer).

This patch contains the following changes:
1) Enable and disable XSK buffer pool
2) Copy XDP packets from QPL bounce buffers to XSK buffer on rx
3) Copy XDP packets from XSK buffer to QPL bounce buffers and
   ring the doorbell as part of XDP TX napi poll
4) ndo_xsk_wakeup callback support

Signed-off-by: Praveen Kaligineedi <pkaligineedi@google.com>
Reviewed-by: Jeroen de Borst <jeroendb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2023-03-17 08:29:21 +00:00
..
accel - Daniel Verkamp has contributed a memfd series ("mm/memfd: add 2023-02-23 17:09:35 -08:00
accessibility
acpi More ACPI updates for 6.3-rc1 2023-03-03 10:36:01 -08:00
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clocksource Updates for timekeeping, timers and clockevent/source drivers: 2023-02-21 09:45:13 -08:00
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hte
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hwmon - Core Frameworks 2023-02-23 15:03:05 -08:00
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input ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
interconnect SoC: DT changes for 6.3 2023-02-20 15:49:56 -08:00
iommu ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
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irqchip ARM: 2023-02-25 11:30:21 -08:00
isdn
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mailbox mailbox: qcom-apcs-ipc: add IPQ5332 APSS clock support 2023-02-23 14:47:13 -06:00
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memory ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
memstick MMC core: 2023-02-27 09:47:26 -08:00
message
mfd Including fixes from wireless and netfilter. 2023-02-27 14:05:08 -08:00
misc ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
mmc ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
most
mtd This pull request contains updates for JFFS2, UBI and UBIFS 2023-03-01 09:06:51 -08:00
mux
net gve: Add AF_XDP zero-copy support for GQI-QPL format 2023-03-17 08:29:21 +00:00
nfc nfc: mrvl: Use of_property_read_bool() for boolean properties 2023-03-16 17:43:14 +00:00
ntb
nubus
nvdimm virtio,vhost,vdpa: features, fixes 2023-02-25 11:48:02 -08:00
nvme block-6.3-2023-03-03 2023-03-03 10:21:39 -08:00
nvmem
of IOMMU Updates for Linux v6.3: 2023-02-24 13:40:13 -08:00
opp OPP: fix error checking in opp_migrate_dentry() 2023-02-16 13:48:53 +01:00
parisc
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pci A set of updates for the interrupt susbsystem: 2023-03-05 11:19:16 -08:00
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phy ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
pinctrl ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
platform platform: mellanox: mlx-platform: Initialize shift variable to 0 2023-03-07 12:08:30 +01:00
pnp
power power supply changes for the v6.3 series (part 2) 2023-03-03 16:33:28 -08:00
powercap More power management updates for 6.3-rc1 2023-03-03 10:30:58 -08:00
pps
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ptp ptp: ines: drop of_match_ptr for ID table 2023-03-15 21:14:57 -07:00
pwm pwm: dwc: Use devm_pwmchip_add() 2023-02-20 12:26:35 +01:00
rapidio
ras
regulator regulator: Fixes for v6.3 2023-03-02 09:21:25 -08:00
remoteproc ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
reset
rpmsg rpmsg updates for v6.3 2023-02-26 12:10:28 -08:00
rtc RTC for 6.3 2023-03-03 09:15:50 -08:00
s390 net/ism: Remove extra include 2023-03-15 08:18:35 +00:00
sbus
scsi cpumask: fix incorrect cpumask scanning result checks 2023-03-06 12:15:13 -08:00
sh sh updates for v6.3 2023-03-01 09:44:22 -08:00
siox
slimbus
soc ARM: SoC drivers for 6.3 2023-02-27 10:04:49 -08:00
soundwire soundwire updates for 6.3 2023-02-24 17:29:52 -08:00
spi spi: Fixes for v6.3 2023-03-02 09:25:38 -08:00
spmi
ssb
staging media updates for v6.3-rc1 2023-02-26 11:47:26 -08:00
target - Daniel Verkamp has contributed a memfd series ("mm/memfd: add 2023-02-23 17:09:35 -08:00
tc
tee Driver core changes for 6.3-rc1 2023-02-24 12:58:55 -08:00
thermal More thermal control updates for 6.3-rc1 2023-03-03 10:41:59 -08:00
thunderbolt Driver core changes for 6.3-rc1 2023-02-24 12:58:55 -08:00
tty vc_screen: don't clobber return value in vcs_read 2023-02-27 18:35:28 -08:00
ufs SCSI misc on 20230303 2023-03-03 14:41:50 -08:00
uio - Daniel Verkamp has contributed a memfd series ("mm/memfd: add 2023-02-23 17:09:35 -08:00
usb phy-for-6.3 2023-02-24 17:22:11 -08:00
vdpa virtio,vhost,vdpa: features, fixes 2023-02-25 11:48:02 -08:00
vfio VFIO updates for v6.3-rc1 2023-02-25 11:52:57 -08:00
vhost virtio,vhost,vdpa: features, fixes 2023-02-25 11:48:02 -08:00
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virt virt/sev-guest: Return -EIO if certificate buffer is not large enough 2023-03-01 10:17:46 +01:00
virtio virtio,vhost,vdpa: features, fixes 2023-02-25 11:48:02 -08:00
vlynq
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Kconfig
Makefile Kbuild updates for v6.3 2023-02-26 11:53:25 -08:00