AuxXxilium/linux_dsm_epyc7002
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14ffeb52f3
linux_dsm_epyc7002/drivers/net/ethernet
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Magnus Karlsson 14ffeb52f3 i40e: fix potential RX buffer starvation for AF_XDP 
When the RX rings are created they are also populated with buffers
so that packets can be received. Usually these are kernel buffers,
but for AF_XDP in zero-copy mode, these are user-space buffers and
in this case the application might not have sent down any buffers
to the driver at this point. And if no buffers are allocated at ring
creation time, no packets can be received and no interrupts will be
generated so the NAPI poll function that allocates buffers to the
rings will never get executed.

To rectify this, we kick the NAPI context of any queue with an
attached AF_XDP zero-copy socket in two places in the code. Once
after an XDP program has loaded and once after the umem is registered.
This take care of both cases: XDP program gets loaded first then AF_XDP
socket is created, and the reverse, AF_XDP socket is created first,
then XDP program is loaded.

Fixes: 0a714186d3 ("i40e: add AF_XDP zero-copy Rx support")
Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2019-02-21 10:56:17 -08:00
..
3com net: documentation: build a directory structure for drivers 2018-12-05 11:30:06 -08:00
8390
adaptec
aeroflex cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
agere
alacritech cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
allwinner
alteon net: alteon: replace dev_kfree_skb_irq by dev_consume_skb_irq 2019-01-28 23:09:19 -08:00
altera net: altera_tse: fix msgdma_tx_completion on non-zero fill_level case 2019-01-27 10:39:07 -08:00
amazon net: ena: update driver version from 2.0.2 to 2.0.3 2019-02-12 14:05:07 -05:00
amd net: amd8111e: replace dev_kfree_skb_irq by dev_consume_skb_irq 2019-01-28 23:09:19 -08:00
apm cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
apple net: apple: replace dev_kfree_skb_irq by dev_consume_skb_irq for drop profiles 2019-01-28 23:09:19 -08:00
aquantia Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-12-09 21:43:31 -08:00
arc net: ethernet: Convert phydev advertize and supported from u32 to link mode 2018-11-11 10:10:01 -08:00
atheros cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
aurora
broadcom net: systemport: Fix reception of BPDUs 2019-02-15 20:37:54 -08:00
brocade
cadence net: macb: Apply RXUBR workaround only to versions with errata 2019-01-29 09:41:04 -08:00
calxeda
cavium net: Don't default Cavium PTP driver to 'y' 2019-02-06 19:48:15 -08:00
chelsio Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-01-16 05:13:36 +12:00
cirrus net: documentation: build a directory structure for drivers 2018-12-05 11:30:06 -08:00
cisco enic: fix checksum validation for IPv6 2019-02-01 14:41:42 -08:00
cortina net: gemini: Fix copy/paste error 2018-11-23 22:35:38 -08:00
davicom
dec net: tulip: de2104x: replace dev_kfree_skb_irq by dev_consume_skb_irq for drop profiles 2019-02-06 17:38:15 -08:00
dlink net: documentation: build a directory structure for drivers 2018-12-05 11:30:06 -08:00
emulex cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
ezchip
faraday cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
freescale net: ethernet: freescale: set FEC ethtool regs version 2019-02-14 12:45:35 -05:00
fujitsu
hisilicon net: hns: Fixes the missing put_device in positive leg for roce reset 2019-02-18 17:45:00 -08:00
hp
huawei cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
i825xx net: i825xx: replace dev_kfree_skb_irq by dev_consume_skb_irq for drop profiles 2019-01-28 10:53:28 -08:00
ibm ibmveth: Do not process frames after calling napi_reschedule 2019-01-24 22:48:15 -08:00
intel i40e: fix potential RX buffer starvation for AF_XDP 2019-02-21 10:56:17 -08:00
marvell net: marvell: mvneta: fix DMA debug warning 2019-02-20 19:55:51 -08:00
mediatek Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-01-16 05:13:36 +12:00
mellanox net/mlx4_en: fix spelling mistake: "quiting" -> "quitting" 2019-02-18 12:06:42 -08:00
micrel
microchip lan743x: Remove phy_read from link status change function 2019-01-08 16:26:12 -05:00
moxa
mscc USB/PHY patches for 4.21-rc1 2018-12-28 20:30:00 -08:00
myricom cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
natsemi
neterion Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-12-20 11:53:36 -08:00
netronome cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
ni cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
nuvoton w90p910_ether: remove incorrect __init annotation 2018-12-14 14:42:51 -08:00
nvidia
nxp net: lpc_eth: fix trivial comment typo 2018-11-21 16:17:32 -08:00
oki-semi cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
packetengines
pasemi cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
qlogic qed: Fix iWARP syn packet mac address validation. 2019-02-18 16:51:54 -08:00
qualcomm cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
rdc
realtek Revert "r8169: make use of xmit_more and __netdev_sent_queue" 2019-02-10 12:54:48 -08:00
renesas ravb: expand rx descriptor data to accommodate hw checksum 2019-01-23 09:21:22 -08:00
rocker rocker, dsa, ethsw: Don't filter VLAN events on bridge itself 2018-11-23 18:02:24 -08:00
samsung cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
seeq
sfc sfc: initialise found bitmap in efx_ef10_mtd_probe 2019-02-12 11:49:21 -05:00
sgi cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
silan
sis ethernet/sis: Replace synchronize_sched() with synchronize_rcu() 2018-11-27 09:21:36 -08:00
smsc net: smsc: epic100: replace dev_kfree_skb_irq by dev_consume_skb_irq for drop profiles 2019-02-06 17:38:15 -08:00
socionext cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
stmicro net: stmmac: Fix a race in EEE enable callback 2019-02-18 17:39:11 -08:00
sun net: sun: replace dev_kfree_skb_irq by dev_consume_skb_irq for drop profiles 2019-02-06 17:38:15 -08:00
synopsys
tehuti net: tehuti: replace dev_kfree_skb_irq by dev_consume_skb_irq for drop profiles 2019-02-06 17:38:15 -08:00
ti net: netcp: Fix ethss driver probe issue 2019-02-18 17:49:24 -08:00
toshiba net: ethernet: Convert phydev advertize and supported from u32 to link mode 2018-11-11 10:10:01 -08:00
tundra cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
via net: via-velocity: replace dev_kfree_skb_irq by dev_consume_skb_irq for drop profiles 2019-02-06 17:38:15 -08:00
wiznet
xilinx cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
xircom
xscale
dnet.c
dnet.h
ec_bhf.c
ethoc.c
fealnx.c
jme.c
jme.h
Kconfig
korina.c
lantiq_etop.c
lantiq_xrx200.c net: lantiq: Fix returned value in case of error in 'xrx200_probe()' 2018-11-16 19:46:49 -08:00
Makefile
netx-eth.c