- 16 Jun, 2021 9 commits
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Jiapeng Chong authored
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:
Abaci Robot <abaci@linux.alibaba.com> Signed-off-by:
Jiapeng Chong <jiapeng.chong@linux.alibaba.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
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:
Stephan Gerhold <stephan@gerhold.net> Signed-off-by:
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Yunsheng Lin authored
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:
Yunsheng Lin <linyunsheng@huawei.com> Signed-off-by:
Guangbin Huang <huangguangbin2@huawei.com> Signed-off-by:
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Yunsheng Lin authored
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:
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Yunsheng Lin authored
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:
Barry Song <song.bao.hua@hisilicon.com> Signed-off-by:
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Huazhong Tan authored
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:
Huazhong Tan <tanhuazhong@huawei.com> Signed-off-by:
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Yunsheng Lin authored
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:
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Yunsheng Lin authored
Factor out hns3_fill_desc() so that it can be reused in the tx bounce supporting. Signed-off-by:
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Yunsheng Lin authored
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:
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- 15 Jun, 2021 31 commits
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Lorenzo Bianconi authored
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:
Grygorii Strashko <grygorii.strashko@ti.com> Reviewed-by:
Lorenzo Bianconi <lorenzo@kernel.org> Signed-off-by:
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M Chetan Kumar authored
Fixes .rst file warnings seen on linux-next build. Fixes: f7af616c ("net: iosm: infrastructure") Reported-by:
Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
M Chetan Kumar <m.chetan.kumar@intel.com> Signed-off-by:
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Colin Ian King authored
There is a spelling mistake in a dev_err message. Fix it. Signed-off-by:
Colin Ian King <colin.king@canonical.com> Signed-off-by:
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Colin Ian King authored
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:Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
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Jussi Maki authored
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:Jussi Maki <joamaki@gmail.com> Signed-off-by:
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Liu Shixin authored
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:Hulk Robot <hulkci@huawei.com> Signed-off-by:
Liu Shixin <liushixin2@huawei.com> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linuxDavid S. Miller authored
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: -
David S. Miller authored
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: -
Subbaraya Sundeep authored
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:
Subbaraya Sundeep <sbhatta@marvell.com> Signed-off-by:
Sunil Kovvuri Goutham <sgoutham@marvell.com> Signed-off-by:
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Subbaraya Sundeep authored
This patch modifies all netdev_err messages in tc code to NL_SET_ERR_MSG_MOD. NL_SET_ERR_MSG_MOD does not support format specifiers yet hence netdev_err messages with only strings are modified. Signed-off-by:
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Sunil Goutham authored
Add TC_MATCHALL ingress ratelimiting offload support with POLICE action for entire traffic coming into the interface. Eg: To ratelimit ingress traffic to 100Mbps $ ethtool -K eth0 hw-tc-offload on $ tc qdisc add dev eth0 clsact $ tc filter add dev eth0 ingress matchall skip_sw \ action police rate 100Mbit burst 32Kbit To support this, a leaf level bandwidth profile is allocated and all RQs' contexts used by this interface are updated to point to it. And the leaf level bandwidth profile is configured with user specified rate and burst sizes. Co-developed-by: -
Sunil Goutham authored
Added support for dumping current resource status of bandwidth profiles and contexts of allocated profiles via debugfs. Signed-off-by:
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Sunil Goutham authored
CN10K silicons supports hierarchial ingress packet ratelimiting. There are 3 levels of profilers supported leaf, mid and top. Ratelimiting is done after packet forwarding decision is taken and a NIXLF's RQ is identified to DMA the packet. RQ's context points to a leaf bandwidth profile which can be configured to achieve desired ratelimit. This patch adds logic for management of these bandwidth profiles ie profile alloc, free, context update etc. Signed-off-by:
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David S. Miller authored
Peng Li says: ==================== net: pci200syn: clean up some code style issues This patchset clean up some code style issues. ==================== Signed-off-by: -
Peng Li authored
Networking block comments don't use an empty /* line, use /* Comment... This patch fixes the comments style issues. Signed-off-by:
Peng Li <lipeng321@huawei.com> Signed-off-by:
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Peng Li authored
Macro argument 'card' may be better as '(card)' to avoid precedence issues. Signed-off-by:
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Peng Li authored
Add spaces required after that close brace '}'. Add spaces required before the open parenthesis '('. Add spaces required after that ','. Signed-off-by: -
Peng Li authored
According to the chackpatch.pl, comparison to NULL could be written "!card". Signed-off-by:
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Peng Li authored
This patch fixes the checkpatch error about missing a blank line after declarations. Signed-off-by:
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Peng Li authored
This patch removes some redundant blank lines. Signed-off-by:
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David S. Miller authored
Peng Li says: ==================== net: z85230: clean up some code style issues This patchset clean up some code style issues. --- Change Log: V1 -> V2: 1, fix the comments from Andrew, add commit message to [patch 04/11] about remove volatile. ==================== Signed-off-by: -
Peng Li authored
This patch removes unnecessary out of memory message, to fix the following checkpatch.pl warning: "WARNING: Possible unnecessary 'out of memory' message" Signed-off-by:
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Peng Li authored
This patch fixes the code style issue according to checkpatch.pl error: "ERROR: that open brace { should be on the previous line". Signed-off-by: -
Peng Li authored
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: -
Peng Li authored
This patch removes trailing whitespaces. Signed-off-by:
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Peng Li authored
According to the chackpatch.pl, else should follow close brace '}', braces {} should be used on all arms of this statement. Signed-off-by: -
Peng Li authored
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:
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Peng Li authored
According to the chackpatch.pl, comparison to NULL could be written "!skb". Signed-off-by:
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Peng Li authored
According to the chackpatch.pl, EXPORT_SYMBOL(foo); should immediately follow its function/variable. Signed-off-by:
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Peng Li authored
This patch fixes the checkpatch error about missing a blank line after declarations. Signed-off-by:
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Peng Li authored
This patch removes some redundant blank lines. Signed-off-by:
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