- 16 Nov, 2016 40 commits
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David S. Miller authored
Eric Dumazet says: ==================== net: busy-poll: allow preemption and other optimizations It is time to have preemption points in sk_busy_loop() and improve its scalability. Also napi_complete() and friends can tell drivers when it is safe to not re-enable device interrupts, saving some overhead under high busy polling. mlx4 and bnx2x are changed accordingly, to show how this busy polling status can be exploited by drivers. Next steps will implement Zach Brown suggestion, where NAPI polling would be enabled all the time for some chosen queues. This is needed for efficient epoll() support anyway. ==================== Signed-off-by:David S. Miller <davem@davemloft.net>
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Eric Dumazet authored
Switch from napi_complete() to napi_complete_done() for better GRO support (gro_flush_timeout) and core NAPI features. Do not rearm interrupts if we are busy polling, to reduce bus and interrupts overhead. Signed-off-by:
Eric Dumazet <edumazet@google.com> Cc: Willem de Bruijn <willemb@google.com> Cc: Adam Belay <abelay@google.com> Cc: Tariq Toukan <tariqt@mellanox.com> Cc: Yuval Mintz <Yuval.Mintz@cavium.com> Cc: Ariel Elior <ariel.elior@cavium.com> Signed-off-by:
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Eric Dumazet authored
Do not rearm interrupts if we are busy polling. mlx4 uses separate CQ for TX and RX, so number of TX interrupts does not change, unfortunately. Signed-off-by:
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Eric Dumazet authored
NAPI drivers use napi_complete_done() or napi_complete() when they drained RX ring and right before re-enabling device interrupts. In busy polling, we can avoid interrupts being delivered since we are polling RX ring in a controlled loop. Drivers can chose to use napi_complete_done() return value to reduce interrupts overhead while busy polling is active. This is optional, legacy drivers should work fine even if not updated. Signed-off-by:
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Eric Dumazet authored
Now sk_busy_loop() can schedule by itself, we can remove need_resched() check from sk_can_busy_loop() Also add a const to its struct sock parameter. Signed-off-by:
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Eric Dumazet authored
After commit 4cd13c21 ("softirq: Let ksoftirqd do its job"), sk_busy_loop() needs a bit of care : softirqs might be delayed since we do not allow preemption yet. This patch adds preemptiom points in sk_busy_loop(), and makes sure no unnecessary cache line dirtying or atomic operations are done while looping. A new flag is added into napi->state : NAPI_STATE_IN_BUSY_POLL This prevents napi_complete_done() from clearing NAPIF_STATE_SCHED, so that sk_busy_loop() does not have to grab it again. Similarly, netpoll_poll_lock() is done one time. This gives about 10 to 20 % improvement in various busy polling tests, especially when many threads are busy polling in configurations with large number of NIC queues. This should allow experimenting with bigger delays without hurting overall latencies. Tested: On a 40Gb mlx4 NIC, 32 RX/TX queues. echo 70 >/proc/sys/net/core/busy_read for i in `seq 1 40`; do echo -n $i: ; ./super_netperf $i -H lpaa24 -t UDP_RR -- -N -n; done Before: After: 1: 90072 92819 2: 157289 184007 3: 235772 213504 4: 344074 357513 5: 394755 458267 6: 461151 487819 7: 549116 625963 8: 544423 716219 9: 720460 738446 10: 794686 837612 11: 915998 923960 12: 937507 925107 13: 1019677 971506 14: 1046831 1113650 15: 1114154 1148902 16: 1105221 1179263 17: 1266552 1299585 18: 1258454 1383817 19: 1341453 1312194 20: 1363557 1488487 21: 1387979 1501004 22: 1417552 1601683 23: 1550049 1642002 24: 1568876 1601915 25: 1560239 1683607 26: 1640207 1745211 27: 1706540 1723574 28: 1638518 1722036 29: 1734309 1757447 30: 1782007 1855436 31: 1724806 1888539 32: 1717716 1944297 33: 1778716 1869118 34: 1805738 1983466 35: 1815694 2020758 36: 1893059 2035632 37: 1843406 2034653 38: 1888830 2086580 39: 1972827 2143567 40: 1877729 2181851 Signed-off-by:
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Martin KaFai Lau authored
gcc-6.2.1 gives the following warning: kernel/bpf/bpf_lru_list.c: In function ‘__bpf_lru_list_rotate_inactive.isra.3’: kernel/bpf/bpf_lru_list.c:201:28: warning: ‘next’ may be used uninitialized in this function [-Wmaybe-uninitialized] The "next" is currently initialized in the while() loop which must have >=1 iterations. This patch initializes next to get rid of the compiler warning. Fixes: 3a08c2fd ("bpf: LRU List") Reported-by:
Martin KaFai Lau <kafai@fb.com> Acked-by:
Alexei Starovoitov <ast@kernel.org> Signed-off-by:
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David Lebrun authored
This patch adds a new option CONFIG_IPV6_SEG6_LWTUNNEL to enable/disable support of encapsulation with the lightweight tunnels. When this option is enabled, CONFIG_LWTUNNEL is automatically selected. Fix commit 6c8702c6 ("ipv6: sr: add support for SRH encapsulation and injection with lwtunnels") Without a proper option to control lwtunnel support for SR-IPv6, if CONFIG_LWTUNNEL=n then the IPv6 initialization fails as a consequence of seg6_iptunnel_init() failure with EOPNOTSUPP: NET: Registered protocol family 10 IPv6: Attempt to unregister permanent protocol 6 IPv6: Attempt to unregister permanent protocol 136 IPv6: Attempt to unregister permanent protocol 17 NET: Unregistered protocol family 10 Tested (compiling, booting, and loading ipv6 module when relevant) with possible combinations of CONFIG_IPV6={y,m,n}, CONFIG_IPV6_SEG6_LWTUNNEL={y,n} and CONFIG_LWTUNNEL={y,n}. Reported-by:
Lorenzo Colitti <lorenzo@google.com> Suggested-by:
Roopa Prabhu <roopa@cumulusnetworks.com> Signed-off-by:
David Lebrun <david.lebrun@uclouvain.be> Signed-off-by:
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David S. Miller authored
Tobias Regnery says: ==================== alx: add multi queue support This patchset lays the groundwork for multi queue support in the alx driver and enables multi queue support for the tx path by default. The hardware supports up to 4 tx queues. Benefits are better utilization of multi core cpus and the usage of the msi-x support by default which splits the handling of rx / tx and misc other interrupts. The rx path is a little bit harder because apparently (based on the limited information from the downstream driver) the hardware supports up to 8 rss queues but only has one hardware descriptor ring on the rx side. So the rx path will be part of another patchset. Tested on my AR8161 ethernet adapter with different tests: - there are no regressions observed during my daily usage - iperf tcp and udp tests shows no performance regressions - netperf TCP_RR and UDP_RR shows a slight performance increase of about 1-2% with this patchset applied This work is based on the downstream driver at github.com/qca/alx Changes in V2: - drop unneeded casts in alx_alloc_rx_ring (Patch 1) - add additional information about testing and benefit to the changelog ==================== Signed-off-by: -
Tobias Regnery authored
Enable multiple tx queues by default based on the number of online cpus. The hardware supports up to four tx queues. Based on the downstream driver at github.com/qca/alx Signed-off-by:
Tobias Regnery <tobias.regnery@gmail.com> Signed-off-by:
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Tobias Regnery authored
Remove the module parameter to enable msi-x support and enable msi-x interrupts unconditionally by default. This is a preparatory step to enable multi queue support by default, because this is only working with msi-x interrupts. Signed-off-by:
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Tobias Regnery authored
This patch prepares the tx path to send data on multiple tx queues. It introduces per queue register adresses and uses them in the alx_tx_queue structs. There are new helper functions for the queue mapping in the tx path. Based on the downstream driver at github.com/qca/alx Signed-off-by:
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Tobias Regnery authored
Allocate, initialise and free alx_tx_queue structs based on the number of alx_napi structures. Also increase the size of the descriptor memory based on the number of tx queues in use. Based on the downstream driver at github.com/qca/alx Signed-off-by:
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Tobias Regnery authored
Extend the interrupt bringup code and the interrupt handler for msi-x interrupts in order to handle multiple queues. We must change the poll function because with multiple queues it is possible that an alx_napi structure has only a tx or only a rx queue pointer. Based on the downstream driver at github.com/qca/alx Signed-off-by:
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Tobias Regnery authored
Remove the tx and rx queue structures from the alx_priv structure and switch everything over to the queue pointers in the alx_napi structure. Based on the downstream driver at github.com/qca/alx Signed-off-by:
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Tobias Regnery authored
Add new functions to allocate and free the alx_napi structures and use them in __alx_open and __alx_stop. We only allocate one of these structures for now, as the rest of the driver is not yet ready for multiple queues. We switch over the setup of the interrupt mask and the call to netif_napi_add to the new function because we must adjust these later on a per queue basis. Based on the downstream driver at github.com/qca/alx Signed-off-by:
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Tobias Regnery authored
Extend the driver data structures to be able to handle multiple queues. Based on the downstream driver at github.com/qca/alx Signed-off-by:
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Tobias Regnery authored
Split the allocation of descriptor memory and the buffer allocation into a tx and rx function. This is in preparation for multiple queues where we need to iterate over the new functions. While at it drop the unneeded casting on the rx side. Signed-off-by:
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David S. Miller authored
Madalin Bucur says: ==================== dpaa_eth: Add the QorIQ DPAA Ethernet driver This patch series adds the Ethernet driver for the Freescale QorIQ Data Path Acceleration Architecture (DPAA). This version includes changes following the feedback received on previous versions from Eric Dumazet, Bob Cochran, Joe Perches, Paul Bolle, Joakim Tjernlund, Scott Wood, David Miller - thank you. Together with the driver a managed version of alloc_percpu is provided that simplifies the release of per-CPU memory. The Freescale DPAA architecture consists in a series of hardware blocks that support the Ethernet connectivity. The Ethernet driver depends upon the following drivers that are currently in the Linux kernel: - Peripheral Access Memory Unit (PAMU) drivers/iommu/fsl_* - Frame Manager (FMan) added in v4.4 drivers/net/ethernet/freescale/fman - Queue Manager (QMan), Buffer Manager (BMan) added in v4.9-rc1 drivers/soc/fsl/qbman dpaa_eth interfaces mapping to FMan MACs: dpaa_eth /eth0\ ... /ethN\ driver | | | | ------------- ---- ----------- ---- ------------- -Ports / Tx Rx \ ... / Tx Rx \ FMan | | | | -MACs | MAC0 | | MACN | / dtsec0 \ ... / dtsecN \ (or tgec) / \ / \(or memac) --------- -------------- --- -------------- --------- FMan, FMan Port, FMan SP, FMan MURAM drivers --------------------------------------------------------- FMan HW blocks: MURAM, MACs, Ports, SP --------------------------------------------------------- dpaa_eth relation to QMan, FMan: ________________________________ dpaa_eth / eth0 \ driver / \ --------- -^- -^- -^- --- --------- QMan driver / \ / \ / \ \ / | BMan | |Rx | |Rx | |Tx | |Tx | | driver | --------- |Dfl| |Err| |Cnf| |FQs| | | QMan HW |FQ | |FQ | |FQ | | | | | / \ / \ / \ \ / | | --------- --- --- --- -v- --------- | FMan QMI | | | FMan HW FMan BMI | BMan HW | ----------------------- -------- where the acronyms used above (and in the code) are: DPAA = Data Path Acceleration Architecture FMan = DPAA Frame Manager QMan = DPAA Queue Manager BMan = DPAA Buffers Manager QMI = QMan interface in FMan BMI = BMan interface in FMan FMan SP = FMan Storage Profiles MURAM = Multi-user RAM in FMan FQ = QMan Frame Queue Rx Dfl FQ = default reception FQ Rx Err FQ = Rx error frames FQ Tx Cnf FQ = Tx confirmation FQ Tx FQs = transmission frame queues dtsec = datapath three speed Ethernet controller (10/100/1000 Mbps) tgec = ten gigabit Ethernet controller (10 Gbps) memac = multirate Ethernet MAC (10/100/1000/10000) Changes from v7: - remove the debug option to use a common buffer pool for all the interfaces Changed from v6: - fixed an issue on an error path in dpaa_set_mac_address() - removed NDO operation definitions that were not needed - sorted the local variable declarations - cleaned up a few checkpatch checks - removed friendly network interface naming code Changes from v5: - adapt to the latest Q/BMan drivers API - use build_skb() on Rx path instead of buffer pool refill path - proper support for multiple buffer pools - align function, variable names, code cleanup - driver file structure cleanup Changes from v4: - addressed feedback from Scott Wood and Joe Perches - fixed spelling - fixed leak of uninitialized stack to userspace - fix prints - replace raw_cpu_ptr() with this_cpu_ptr() - remove _s from the end of structure names - remove underscores at start of functions, goto labels - remove likely in error paths - use container_of() instead of open casts - remove priv from the driver name - move return type on same line with function name - drop DPA_READ_SKB_PTR/DPA_WRITE_SKB_PTR Changes from v3: - removed bogus delay and comment in .ndo_stop implementation - addressed minor issues reported by David Miller Changes from v2: - removed debugfs, moved exports to ethtool statistics - removed congestion groups Kconfig params Changes from v1: - bpool level Kconfig options removed - print format using pr_fmt, cleaned up prints - __hot/__cold removed - gratuitous unlikely() removed - code style aligned, consistent spacing for declarations - comment formatting ==================== Signed-off-by: -
Madalin Bucur authored
Signed-off-by:
Madalin Bucur <madalin.bucur@nxp.com> Signed-off-by:
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Madalin Bucur authored
Signed-off-by:
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Madalin Bucur authored
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Madalin Bucur authored
Add trace points on the hot processing path. Signed-off-by:
Ruxandra Ioana Radulescu <ruxandra.radulescu@nxp.com> Signed-off-by:
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Madalin Bucur authored
Export Frame Queue and Buffer Pool IDs through sysfs. Signed-off-by:
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Madalin Bucur authored
Add a series of counters to be exported through ethtool: - add detailed counters for reception errors; - add detailed counters for QMan enqueue reject events; - count the number of fragmented skbs received from the stack; - count all frames received on the Tx confirmation path; - add congestion group statistics; - count the number of interrupts for each CPU. Signed-off-by:
Ioana Ciornei <ioana.ciornei@nxp.com> Signed-off-by:
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Madalin Bucur authored
Add support for basic ethtool operations. Signed-off-by:
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Madalin Bucur authored
This introduces the Freescale Data Path Acceleration Architecture (DPAA) Ethernet driver (dpaa_eth) that builds upon the DPAA QMan, BMan, PAMU and FMan drivers to deliver Ethernet connectivity on the Freescale DPAA QorIQ platforms. Signed-off-by:
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Madalin Bucur authored
Introduce managed counterparts for alloc_percpu() and free_percpu(). Add devm_alloc_percpu() and devm_free_percpu() into the managed interfaces list. Signed-off-by:
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Andrey Vagin authored
The repair mode is used to get and restore sequence numbers and data from queues. It used to checkpoint/restore connections. Currently the repair mode can be enabled for sockets in the established and closed states, but for other states we have to dump the same socket properties, so lets allow to enable repair mode for these sockets. The repair mode reveals nothing more for sockets in other states. Signed-off-by:
Andrei Vagin <avagin@openvz.org> Acked-by:
Pavel Emelyanov <xemul@openvz.org> Signed-off-by:
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David S. Miller authored
Raghu Vatsavayi says: ==================== liquidio CN23XX VF support Following is the V6 patch series for adding VF support on CN23XX devices. This version addressed: 1) Your concern for ordering of local variable declarations from longest to shortest line. 2) Removed module parameters max_vfs, num_queues_per_{p,v}f. 3) Minor changes for fixing new checkpatch script related errors on pre-existing driver. 4) Fixed compilation issues when CONFIG_PCI_IOV/CONFIG_PCI_ATS options are disabled. 5) Modified qualifiers for printing mac addresses with pM format. I will post remaining VF patches soon after this patchseries is applied. Please apply patches in the following order as some of the patches depend on earlier patches. ==================== Signed-off-by: -
Raghu Vatsavayi authored
New checkpatch script shows some errors with pre-existing driver. This patch provides fix for those errors. Signed-off-by:
Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com> Signed-off-by:
Derek Chickles <derek.chickles@caviumnetworks.com> Signed-off-by:
Satanand Burla <satananda.burla@caviumnetworks.com> Signed-off-by:
Felix Manlunas <felix.manlunas@caviumnetworks.com> Signed-off-by:
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Raghu Vatsavayi authored
Updated copyrights comments and also changed some other comments alignments. Signed-off-by:
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Raghu Vatsavayi authored
Cleaned up unnecessary comments and added some minor macros. Signed-off-by:
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Raghu Vatsavayi authored
Cleaned up resource leaks during destroy resources by introducing more device states. Signed-off-by:
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Raghu Vatsavayi authored
Adds support for VF related operations like mac address vlan and link changes. Signed-off-by:
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Raghu Vatsavayi authored
Adds support for mailbox interrupt processing of various commands. Signed-off-by:
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Raghu Vatsavayi authored
Adds support for mailbox communication between PF and VF. Signed-off-by:
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Raghu Vatsavayi authored
Adds sysfs based support for enabling or disabling VFs. Signed-off-by:
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Raghu Vatsavayi authored
Adds support for configuring HW for creating VFs. Signed-off-by:
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David S. Miller authored
Tom Lendacky says: ==================== amd-xgbe: AMD XGBE driver updates 2016-11-14 This patch series addresses some minor issues found in the recently accepted patch series for the AMD XGBE driver. The following fixes are included in this driver update series: - Fix how a mask is applied to a Clause 37 register value - Fix some coccinelle identified warnings This patch series is based on net-next. ==================== Signed-off-by:
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