Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: 2bb4b98b ("net: stmmac: Add Ingenic SoCs MAC support.")
Reported-by: NHulk Robot <hulkci@huawei.com>
Signed-off-by: NWei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Using eth_zero_addr() to assign zero address insetad of
inefficient copy from an array.
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Peng Li says:

====================
net: cosa: clean up some code style issues

This patchset clean up some code style issues.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

According to the chackpatch.pl,
no spaces is necessary at the start of a line,
no space is necessary after a cast.
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch removes trailing whitespaces.
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add space required before the open parenthesis '(' and '{'.
Add space required after that close brace '}' and ','
Add spaces required around that '=' , '&', '*', '|', '+', '/' and '-'.
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Trailing statements should be on next line.
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Alignment should match open parenthesis.
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch uses the BIT macro for setting individual bits,
to fix the following checkpatch.pl issue:
CHECK: Prefer using the BIT macro.
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Macro argument 'cosa' may be better as '(cosa)' to avoid
precedence issues.
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch removes redundant braces {}, to fix the
checkpatch.pl warning:
"braces {} are not necessary for single statement blocks".
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Braces {} should be used on all arms of this statement.
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Networking block comments don't use an empty /* line,
use /* Comment...

Block comments use * on subsequent lines.
Block comments use a trailing */ on a separate line.

This patch fixes the comments style issues.
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Should not use assignment in if condition.
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

According to the chackpatch.pl, comparison to NULL could
be written "!chan->rx_skb".
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fix the checkpatch error as "foo* bar" should be "foo *bar".
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch fixes the checkpatch error about missing a blank line
after declarations.
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch removes some redundant blank lines.
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch adds missing MODULE_DEVICE_TABLE definition which generates
correct modalias for automatic loading of this driver when it is built
as an external module.
Reported-by: NHulk Robot <hulkci@huawei.com>
Signed-off-by: NZou Wei <zou_wei@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Convert list_for_each() to list_for_each_entry() where
applicable. This simplifies the code.
Reported-by: NHulk Robot <hulkci@huawei.com>
Signed-off-by: NWang Hai <wanghai38@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

There has been a few errors in the ethtool reply size calculations,
most of those are hard to trigger during basic testing because of
skb size rounding up and netdev names being shorter than max.
Add a more precise check.

This change will affect the value of payload length displayed in
case of -EMSGSIZE but that should be okay, "payload length" isn't
a well defined term here.
Signed-off-by: NJakub Kicinski <kuba@kernel.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Timewait sockets have included mark since approx 4.18.

Cc: Eric Dumazet <edumazet@google.com>
Cc: Jon Maxwell <jmaxwell37@gmail.com>
Fixes: 00483690 ("tcp: Add mark for TIMEWAIT sockets")
Signed-off-by: NMaciej Żenczykowski <maze@google.com>
Reviewed-by: NEric Dumazet <edumazet@google.com>
Reviewed-by: NJon Maxwell <jmaxwell37@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This symbol is not used outside of net.c, so marks it static.

Fix the following sparse warning:

drivers/net/mhi/net.c:385:23: warning: symbol 'mhi_wwan_ops' was not
declared. Should it be static?
Reported-by: NAbaci Robot <abaci@linux.alibaba.com>
Signed-off-by: NJiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Guangbin Huang says:

====================
net: hns3: updates for -next

This series includes some optimization in IO path for the HNS3 ethernet
driver.
====================

Cc: Loic Poulain <loic.poulain@linaro.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: NStephan Gerhold <stephan@gerhold.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Currently rx page will be reused to receive future packet when
the stack releases the previous skb quickly. If the old page
can not be reused, a new page will be allocated and mapped,
which comsumes a lot of cpu when IOMMU is in the strict mode,
especially when the application and irq/NAPI happens to run on
the same cpu.

So allocate a new frag to memcpy the data to avoid the costly
IOMMU unmapping/mapping operation, and add "frag_alloc_err"
and "frag_alloc" stats in "ethtool -S ethX" cmd.

The throughput improves above 50% when running single thread of
iperf using TCP when IOMMU is in strict mode and iperf shares the
same cpu with irq/NAPI(rx_copybreak = 2048 and mtu = 1500).
Signed-off-by: NYunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Current rx page offset only reset to zero when all the below
conditions are satisfied:
1. rx page is only owned by driver.
2. rx page is reusable.
3. the page offset that is above to be given to the stack has
reached the end of the page.

If the page offset is over the hns3_buf_size(), it means the
buffer below the offset of the page is usable when the above
condition 1 & 2 are satisfied, so page offset can be reset to
zero instead of increasing the offset. We may be able to always
reuse the first 4K buffer of a 64K page, which means we can
limit the hot buffer size as much as possible.

The above optimization is a side effect when refacting the
rx page reuse handling in order to support the rx copybreak.
Signed-off-by: NYunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Using the queue based tx buffer, it is also possible to allocate a
sgl buffer, and use skb_to_sgvec() to convert the skb to the sgvec
in order to support the dma_map_sg() to decreases the overhead of
IOMMU mapping and unmapping.

Firstly, it reduces the number of buffers. For example, a tcp skb
may have a 66-byte header and 3 fragments of 4328, 32768, and 28064
bytes. With this patch, dma_map_sg() will combine them into two
buffers, 66-bytes header and one 65160-bytes fragment by using IOMMU.

Secondly, it reduces the number of dma mapping and unmapping. All the
original 4 buffers are mapped only once rather than 4 times.

The throughput improves above 10% when running single thread of iperf
using TCP when IOMMU is in strict mode.
Suggested-by: NBarry Song <song.bao.hua@hisilicon.com>
Signed-off-by: NYunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add support to query tx spare buffer size from configuration
file, and use this info to do spare buffer initialization when
the module parameter 'tx_spare_buf_size' is not specified.
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

when the packet or frag size is small, it causes both security and
performance issue. As dma can't map sub-page, this means some extra
kernel data is visible to devices. On the other hand, the overhead
of dma map and unmap is huge when IOMMU is on.

So add a queue based tx shared bounce buffer to memcpy the small
packet when the len of the xmitted skb is below tx_copybreak.
Add tx_spare_buf_size module param to set the size of tx spare
buffer, and add set/get_tunable to set or query the tx_copybreak.

The throughtput improves from 30 Gbps to 90+ Gbps when running 16
netperf threads with 32KB UDP message size when IOMMU is in the
strict mode(tx_copybreak = 2000 and mtu = 1500).
Suggested-by: NBarry Song <song.bao.hua@hisilicon.com>
Signed-off-by: NYunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Factor out hns3_fill_desc() so that it can be reused in the
tx bounce supporting.
Signed-off-by: NYunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

desc_cb is used to store mapping and freeing info for the
corresponding desc, which is used in the cleaning process.
There will be more desc_cb type coming up when supporting the
tx bounce buffer, change desc_cb type to bit-wise value in order
to reduce the desc_cb type checking operation in the data path.

Also move the desc_cb type definition to hns3_enet.h because it
is only used in hns3_enet.c, and declare a local variable desc_cb
in hns3_clear_desc() to reduce lines of code.
Signed-off-by: NYunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

As already done for mvneta and mvpp2, enable skb recycling for ti
ethernet drivers

ti driver on net-next:
----------------------
[perf top]
 47.15%  [kernel]     [k] _raw_spin_unlock_irqrestore
 11.77%  [kernel]     [k] __cpdma_chan_free
  3.16%  [kernel]     [k] ___bpf_prog_run
  2.52%  [kernel]     [k] cpsw_rx_vlan_encap
  2.34%  [kernel]     [k] __netif_receive_skb_core
  2.27%  [kernel]     [k] free_unref_page
  2.26%  [kernel]     [k] kmem_cache_free
  2.24%  [kernel]     [k] kmem_cache_alloc
  1.69%  [kernel]     [k] __softirqentry_text_start
  1.61%  [kernel]     [k] cpsw_rx_handler
  1.19%  [kernel]     [k] page_pool_release_page
  1.19%  [kernel]     [k] clear_bits_ll
  1.15%  [kernel]     [k] page_frag_free
  1.06%  [kernel]     [k] __dma_page_dev_to_cpu
  0.99%  [kernel]     [k] memset
  0.94%  [kernel]     [k] __alloc_pages_bulk
  0.92%  [kernel]     [k] kfree_skb
  0.85%  [kernel]     [k] packet_rcv
  0.78%  [kernel]     [k] page_address
  0.75%  [kernel]     [k] v7_dma_inv_range
  0.71%  [kernel]     [k] __lock_text_start

[iperf3 tcp]
[  5]   0.00-10.00  sec   873 MBytes   732 Mbits/sec    0   sender
[  5]   0.00-10.01  sec   866 MBytes   726 Mbits/sec        receiver

ti + skb recycling:
-------------------
[perf top]
 40.58%  [kernel]    [k] _raw_spin_unlock_irqrestore
 16.18%  [kernel]    [k] __softirqentry_text_start
 10.33%  [kernel]    [k] __cpdma_chan_free
  2.62%  [kernel]    [k] ___bpf_prog_run
  2.05%  [kernel]    [k] cpsw_rx_vlan_encap
  2.00%  [kernel]    [k] kmem_cache_alloc
  1.86%  [kernel]    [k] __netif_receive_skb_core
  1.80%  [kernel]    [k] kmem_cache_free
  1.63%  [kernel]    [k] cpsw_rx_handler
  1.12%  [kernel]    [k] cpsw_rx_mq_poll
  1.11%  [kernel]    [k] page_pool_put_page
  1.04%  [kernel]    [k] _raw_spin_unlock
  0.97%  [kernel]    [k] clear_bits_ll
  0.90%  [kernel]    [k] packet_rcv
  0.88%  [kernel]    [k] __dma_page_dev_to_cpu
  0.85%  [kernel]    [k] kfree_skb
  0.80%  [kernel]    [k] memset
  0.71%  [kernel]    [k] __lock_text_start
  0.66%  [kernel]    [k] v7_dma_inv_range
  0.64%  [kernel]    [k] gen_pool_free_owner

[iperf3 tcp]
[  5]   0.00-10.00  sec   884 MBytes   742 Mbits/sec    0   sender
[  5]   0.00-10.01  sec   878 MBytes   735 Mbits/sec        receiver
Tested-by: NGrygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: NGrygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fixes .rst file warnings seen on linux-next build.

Fixes: f7af616c ("net: iosm: infrastructure")
Reported-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NM Chetan Kumar <m.chetan.kumar@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

There is a spelling mistake in a dev_err message. Fix it.
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The pointer dev can never be null, the null check is redundant
and can be removed. Cleans up a static analysis warning that
pointer priv is dereferencing dev before dev is being null
checked.

Addresses-Coverity: ("Dereference before null check")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Acked-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The round-robin rr_tx_counter was shared across CPUs leading to
significant cache thrashing at high packet rates. This patch switches
the round-robin packet counter to use a per-cpu variable to decide
the destination slave.

On a test with 2x100Gbit ICE nic with pktgen_sample_04_many_flows.sh
(-s 64 -t 32) the tx rate was 19.6Mpps before and 22.3Mpps after
this patch.

"perf top -e cache_misses" before:
    12.31%  [bonding]       [k] bond_xmit_roundrobin_slave_get
    10.59%  [sch_fq_codel]  [k] fq_codel_dequeue
     9.34%  [kernel]        [k] skb_release_data
after:
    15.42%  [sch_fq_codel]  [k] fq_codel_dequeue
    10.06%  [kernel]        [k] __memset
     9.12%  [kernel]        [k] skb_release_data
Signed-off-by: NJussi Maki <joamaki@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Hulk Robot reported memory leak in netlbl_mgmt_add_common.
The problem is non-freed map in case of netlbl_domhsh_add() failed.

BUG: memory leak
unreferenced object 0xffff888100ab7080 (size 96):
  comm "syz-executor537", pid 360, jiffies 4294862456 (age 22.678s)
  hex dump (first 32 bytes):
    05 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    fe 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01  ................
  backtrace:
    [<0000000008b40026>] netlbl_mgmt_add_common.isra.0+0xb2a/0x1b40
    [<000000003be10950>] netlbl_mgmt_add+0x271/0x3c0
    [<00000000c70487ed>] genl_family_rcv_msg_doit.isra.0+0x20e/0x320
    [<000000001f2ff614>] genl_rcv_msg+0x2bf/0x4f0
    [<0000000089045792>] netlink_rcv_skb+0x134/0x3d0
    [<0000000020e96fdd>] genl_rcv+0x24/0x40
    [<0000000042810c66>] netlink_unicast+0x4a0/0x6a0
    [<000000002e1659f0>] netlink_sendmsg+0x789/0xc70
    [<000000006e43415f>] sock_sendmsg+0x139/0x170
    [<00000000680a73d7>] ____sys_sendmsg+0x658/0x7d0
    [<0000000065cbb8af>] ___sys_sendmsg+0xf8/0x170
    [<0000000019932b6c>] __sys_sendmsg+0xd3/0x190
    [<00000000643ac172>] do_syscall_64+0x37/0x90
    [<000000009b79d6dc>] entry_SYSCALL_64_after_hwframe+0x44/0xae

Fixes: 63c41688 ("netlabel: Add network address selectors to the NetLabel/LSM domain mapping")
Reported-by: NHulk Robot <hulkci@huawei.com>
Signed-off-by: NLiu Shixin <liushixin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Saeed Mahameed says:

====================
mlx5-updates-2021-06-14

1) Trivial Lag refactroing in preparation for upcomming Single FDB lag feature
 - First 3 patches

2) Scalable IRQ distriburion for Sub-functions

A subfunction (SF) is a lightweight function that has a parent PCI
function (PF) on which it is deployed.

Currently, mlx5 subfunction is sharing the IRQs (MSI-X) with their
parent PCI function.

Before this series the PF allocates enough IRQs to cover
all the cores in a system, Newly created SFs will re-use all the IRQs
that the PF has allocated for itself.
Hence, the more SFs are created, there are more EQs per IRQs. Therefore,
whenever we handle an interrupt, we need to pull all SFs EQs and PF EQs
instead of PF EQs without SFs on the system. This leads to a hard impact
on the performance of SFs and PF.

For example, on machine with:
Intel(R) Xeon(R) CPU E5-2697 v3 @ 2.60GHz with 56 cores.
PCI Express 3 with BW of 126 Gb/s.
ConnectX-5 Ex; EDR IB (100Gb/s) and 100GbE; dual-port QSFP28; PCIe4.0 x16.

test case: iperf TX BW single CPU, affinity of app and IRQ are the same.
PF only: no SFs on the system, 56 IRQs.
SF (before), 250 SFs Sharing the same 56 IRQs .
SF (now),    250 SFs + 255 avaiable IRQs for the NIC. (please see IRQ spread scheme below).

	    application SF-IRQ  channel   BW(Gb/sec)         interrupts/sec
            iperf TX            affinity
PF only     cpu={0}     cpu={0} cpu={0}   79                 8200
SF (before) cpu={0}     cpu={0} cpu={0}   51.3 (-35%)        9500
SF (now)    cpu={0}     cpu={0} cpu={0}   78 (-2%)           8200

command:
$ taskset -c 0 iperf -c 11.1.1.1 -P 3 -i 6 -t 30 | grep SUM

The different between the SF examples is that before this series we
allocate num_cpus (56) IRQs, and all of them were shared among the PF
and the SFs. And after this series, we allocate 255 IRQs, and we spread
the SFs among the above IRQs. This have significantly decreased the load
on each IRQ and the number of EQs per IRQ is down by 95% (251->11).

In this patchset the solution proposed is to have a dedicated IRQ pool
for SFs to use. the pool will allocate a large number of IRQs
for SFs to grab from in order to minimize irq sharing between the
different SFs.
IRQs will not be requested from the OS until they are 1st requested by
an SF consumer, and will be eventually released when the last SF consumer
releases them.

For the detailed IRQ spread and allocation scheme  please see last patch:
("net/mlx5: Round-Robin EQs over IRQs")
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Subbaraya Sundeep says:

====================
octeontx2: Add ingress ratelimit offload

This patchset adds ingress rate limiting hardware
offload support for CN10K silicons. Police actions
are added for TC matchall and flower filters.
CN10K has ingress rate limiting feature where
a receive queue is mapped to bandwidth profile
and the profile is configured with rate and burst
parameters by software. CN10K hardware supports
three levels of ingress policing or ratelimiting.
Multiple leaf profiles can  point to a single mid
level profile and multiple mid level profile can
point to a single top level one. Only leaf level
profiles are used for configuring rate limiting.

Patch 1 adds the new bandwidth profile contexts
in AF driver similar to other hardware contexts
Patch 2 adds the debugfs changes to dump bandwidth
profile contexts
Patch 3 adds support for police action with TC matchall filter
Patch 4 uses NL_SET_ERR_MSG_MOD for tc code
Patch 5 adds support for police action with TC flower filter
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Added police action for ingress TC flower
hardware offload. With this rate limiting can be
done per flow. Since rate limiting is tied to
RQs in hardware the number of TC flower filters
with action as police is limited to number
of receive queues of the interface. Both bps
and pps modes are supported.

Examples to rate limit a flow:
$ ethtool -K eth0 hw-tc-offload on
$ tc qdisc add dev eth0 ingress
$ tc filter add dev eth0 parent ffff: protocol ip \
  flower ip_proto udp dst_port 80 action \
  police rate 100Mbit burst 32Kbit

$ tc filter add dev eth0 parent ffff: \
  protocol ip flower dst_mac 5e:b2:34:ee:29:49 \
  action police pkts_rate 5000 pkts_burst 2048
Signed-off-by: NSubbaraya Sundeep <sbhatta@marvell.com>
Signed-off-by: NSunil Kovvuri Goutham <sgoutham@marvell.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>