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2015-11-25sh_eth: Remove obsolete r8a777x-ether platform_device_id entryGeert Uytterhoeven1-3/+0
Since commit 3d7608e4c169af03 ("ARM: shmobile: bockw: remove legacy board file and config"), R-Car Gen1 SoCs are only supported in generic DT-only ARM multi-platform builds. The driver doesn't need to match platform devices by name anymore, hence remove the corresponding platform_device_id entry. Protect sh_eth_set_rate_r8a777x() and r8a777x_data by #ifdef CONFIG_OF, as they're now referenced on DT platforms only. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-25sh_eth: Remove obsolete r8a7740-gether platform_device_id entryGeert Uytterhoeven1-63/+62
Since commit 1fa59bda21c7fa36 ("ARM: shmobile: Remove legacy board code for Armadillo-800 EVA"), r8a7740 is only supported in generic DT-only ARM multi-platform builds. The driver doesn't need to match platform devices by name anymore, hence remove the corresponding platform_device_id entry. Protect r8a7740_data by #ifdef CONFIG_OF as it's now referenced on DT platforms only. Move it to a more logical position, in front of the r8a777x support, so we can have a single #ifdef covering all r7s* and r8a* support soon. This requires moving a few helper functions, too. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-25sh_eth: Remove obsolete r8a779x-ether platform_device_id entriesGeert Uytterhoeven1-4/+2
Since commit a483dcbfa21f919c ("ARM: shmobile: lager: Remove legacy board support"), R-Car Gen2 SoCs are only supported in generic DT-only ARM multi-platform builds. The driver doesn't need to match platform devices by name anymore, hence remove the corresponding platform_device_id entry. Protect r8a779x_data by #ifdef CONFIG_OF as it's now referenced on DT platforms only. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-25sh_eth: Remove obsolete r7s72100-ether platform_device_id entryGeert Uytterhoeven1-41/+42
Since commit 05104c266ae9a167 ("ARM: shmobile: r7s72100: genmai: Remove legacy board file"), r7s72100 is only supported in generic DT-only ARM multi-platform builds. The driver doesn't need to match platform devices by name anymore, hence remove the corresponding platform_device_id entry. Protect r7s72100_data by #ifdef CONFIG_OF as it's now referenced on DT platforms only. Move it to a more logical position, in front of the r8a777x support, so we can have a single #ifdef covering all r7s* and r8a* support soon. This requires moving a helper function, too. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-25vrf: remove slave queue and private slave structNikolay Aleksandrov1-63/+5
The private slave queue and slave struct haven't been used for anything and aren't needed, this allows to reduce memory usage and simplify enslave/release. We can use netdev_for_each_lower_dev() to free the vrf ports when deleting a vrf device. Also if in the future a private struct is needed for each slave, it can be implemented via lower devices' private member (similar to how bonding does it). Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-25Merge branch 'for-upstream' of ↵David S. Miller21-118/+129
git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next Johan Hedberg says: ==================== pull request: bluetooth-next 2015-11-23 Here's the first bluetooth-next pull request for the 4.5 kernel. - Add new Get Advertising Size Information management command - Add support for new system note message type on monitor channel - Refactor LE scan changes behind separate workqueue to avoid races - Fix issue with privacy feature when powering on adapter - Various minor fixes & cleanups here and there Please let me know if there are any issues pulling. Thanks. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-25net: fec: no need to test for the return type of of_property_read_u32Saurabh Sengar1-7/+2
in case of error no need to set num_tx and num_rx = 1, because in case of error these variables will remain unchanged by of_property_read_u32 ie 1 only Signed-off-by: Saurabh Sengar <saurabh.truth@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-24drivers: net: xgene: optimizing the codeSaurabh Sengar1-16/+9
this patch does the following: 1 . remove unnecessary if, else condition 2 . reduce one variable 3 . change the return type of 2 functions to void as there return values turn out to be 0 always after above changes Signed-off-by: Saurabh Sengar <saurabh.truth@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-24Merge tag 'linux-can-next-for-4.5-20151123' of ↵David S. Miller1-75/+101
git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next Marc Kleine-Budde says: ==================== pull-request: can-next 2015-11-23 this is a pull request of a single patch for net-next/master. The patch by Kedareswara rao Appana converts the xilinx CAN driver to runtime_pm. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-23intel: i40e: fix confused codeRasmus Villemoes1-14/+10
This code is pretty confused. The variable name 'bytes_not_copied' clearly indicates that the programmer knew the semantics of copy_{to,from}_user, but then the return value is checked for being negative and used as a -Exxx return value. I'm not sure this is the proper fix, but at least we get rid of the dead code which pretended to check for access faults. Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Acked-by: Shannon Nelson <shannon.nelson@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-11-23ixgbevf: fix spoofed packets with random MACEmil Tantilov2-1/+4
If ixgbevf is loaded while the corresponding PF interface is down and the driver assigns a random MAC address, that address can be overwritten with the value of hw->mac.perm_addr, which would be 0 at that point. To avoid this case we init hw->mac.perm_addr to the randomly generated address and do not set it unless we receive ACK from ixgbe. Reported-by: John Greene <jogreene@redhat.com> Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-11-23ixgbevf: use ether_addr_copy instead of memcpyEmil Tantilov1-8/+6
replace some instances of memcpy for setting up the mac address with ether_addr_copy() Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com> Tested-by: Darin Miller <darin.j.miller@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-11-23i40evf: fix compiler warning of unused variableJesse Brandeburg1-4/+3
Compiler complained of an unused variable, which the driver was just using to store the result of a rd32 which is used to clear a register unconditionally. Just drop the unused variable and re-use one. Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-11-23ixgbe: Remove CS4227 diagnostic codeMark Rustad1-80/+0
Testing has now shown that the diagnostic code used with the CS4227 is no longer needed, so remove it. Signed-off-by: Mark Rustad <mark.d.rustad@intel.com> Tested-by: Darin Miller <darin.j.miller@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-11-23ixgbe/ixgbevf: use napi_schedule_irqoff()Alexander Duyck2-3/+3
The ixgbe_intr and ixgbe/ixgbevf_msix_clean_rings functions run from hard interrupt context or with interrupts already disabled in netpoll. They can use napi_schedule_irqoff() instead of napi_schedule() Signed-off-by: Alexander Duyck <aduyck@mirantis.com> Tested-by: Darin Miller <darin.j.miller@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-11-23ixgbevf: Limit lowest interrupt rate for adaptive interrupt moderation to 12KAlexander Duyck3-6/+5
This patch is the ixgbevf version of commit 8ac34f10a5ea4 "ixgbe: Limit lowest interrupt rate for adaptive interrupt moderation to 12K" The same logic applies here as well as the same results since a netperf test will starve for memory in the time from one Tx interrupt to the next. As a result the ixgbevf driver underperformed when compared to vhost_net. Signed-off-by: Alexander Duyck <aduyck@mirantis.com> Tested-by: Darin Miller <darin.j.miller@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-11-23ixgbe: Add KR mode support for CS4227 chipMark Rustad1-23/+62
KR auto-neg mode is what we will be using going forward. The SW interface for this mode is different that what was used for iXFI. Signed-off-by: Mark Rustad <mark.d.rustad@intel.com> Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-11-23ixgbe: Fix handling of NAPI budget when multiple queues are enabled per vectorAlexander Duyck1-1/+2
This patch corrects an issue in which the polling routine would increase the budget for Rx to at least 1 per queue if multiple queues were present. This would result in Rx packets being processed when the budget was 0 which is meant to indicate that no Rx can be handled. Signed-off-by: Alexander Duyck <aduyck@mirantis.com> Tested-by: Darin Miller <darin.j.miller@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-11-23fm10k: Fix handling of NAPI budget when multiple queues are enabled per vectorAlexander Duyck1-0/+4
This patch corrects an issue in which the polling routine would increase the budget for Rx to at least 1 per queue if multiple queues were present. This would result in Rx packets being processed when the budget was 0 which is meant to indicate that no Rx can be handled. Signed-off-by: Alexander Duyck <aduyck@mirantis.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-11-23ixgbe: fix multiple kernel-doc errorsJean Sacren1-6/+3
The commit dfaf891dd3e1 ("ixgbe: Refactor the RSS configuration code") introduced a few kernel-doc errors: 1) The function name is missing; 2) The format is wrong; 3) The short description is redundant. Fix all the above for the correct execution of the kernel doc. Signed-off-by: Jean Sacren <sakiwit@gmail.com> Tested-by: Darin Miller <darin.j.miller@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-11-23ixgbe: Delete redundant include fileMark Rustad1-3/+0
Delete a redundant include of net/vxlan.h. Signed-off-by: Mark Rustad <mark.d.rustad@intel.com> Tested-by: Darin Miller <darin.j.miller@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-11-23ixgbe: drop null test before destroy functionsJulia Lawall1-2/+1
Remove unneeded NULL test. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression x; @@ -if (x != NULL) \(kmem_cache_destroy\|mempool_destroy\|dma_pool_destroy\)(x); // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Tested-by: Darin Miller <darin.j.miller@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-11-23fm10k: Correct MTU for jumbo framesJacob Keller1-1/+1
Based on hardware testing, the host interface supports up to 15368 bytes as the maximum frame size. To determine the correct MTU, we subtract 8 for the internal switch tag, 14 for the L2 header, and 4 for the appended FCS header, resulting in 15342 bytes of payload for our maximum MTU on jumbo frames. Signed-off-by: Matthew Vick <matthew.vick@intel.com> Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Acked-by: Bruce Allan <bruce.w.allan@intel.com> Tested-by: Krishneil Singh <krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-11-23fm10k: do not assume VF always has 1 queueJacob Keller2-1/+7
It is possible that the PF has not yet assigned resources to the VF. Although rare, this could result in the VF attempting to read queues it does not own and result in FUM or THI faults in the PF. To prevent this, check queue 0 before we continue in init_hw_vf. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-11-23dsa: mv88e6xxx.c: Hardware reset the chip if availableAndrew Lunn1-0/+10
The device tree binding now allows a gpio to be specified which is attached to the switch chips reset line. If it is defined, perform a hardware reset on the switch during setup. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-23can: xilinx: Convert to runtime_pmKedareswara rao Appana1-75/+101
Instead of enabling/disabling clocks at several locations in the driver, Use the runtime_pm framework. This consolidates the actions for runtime PM In the appropriate callbacks and makes the driver more readable and mantainable. Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2015-11-23gianfar: use of_property_read_bool()Saurabh Sengar1-4/+1
use of_property_read_bool() for testing bool property Signed-off-by: Saurabh Sengar <saurabh.truth@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-22bnx2x: Utilize FW 7.13.1.0.Yuval Mintz1-20/+23
Commit 46e8a249423ff "bnx2x: Add FW 7.13.1.0" added said .bin FW to linux-firmware; This patch incorporates the FW in the bnx2x driver. This introduces 2 fixes/enhancements: - In some management protocols there are outer-vlan configurations that can be dynamically changed while device is running. This fixes some corner cases where such a change did not take effect. - Prevent VFs from sending MAC control frames; FW would treat a VF sending such a packet as malicious and block any further communication done by the VF. Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com> Signed-off-by: Ariel Elior <Ariel.Elior@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-20ravb: use clock rate as basis for GTI.TIVSimon Horman2-1/+40
The GTI.TIV may be set to 2GHz^2 / rate, where rate is that of the clock of the device. Rather than assuming a rate of 130MHz use the actual rate of the clock. The motivation for this is to use the correct rate on the r8a7795/Salvator-X which is advertised as 133MHz but may differ depending on the extal present on the Salvator-X. Signed-off-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-20dl2k: Implement suspendOndrej Zary1-14/+65
Add suspend/resume support to dl2k driver. This requires RX/TX rings to be reset so split out the required functionality from alloc_list() into new rio_reset_ring(). Tested on Asus NX1101 (IP1000A) and D-Link DGE-550T (DL-2000). Signed-off-by: Ondrej Zary <linux@rainbow-software.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-20dl2k: Reorder and cleanup initializationOndrej Zary1-39/+56
Move HW init and stop into separate functions. Request IRQ only after the HW has been reset (so interrupts are disabled and no stale interrupts are pending). Signed-off-by: Ondrej Zary <linux@rainbow-software.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-20dl2k: Handle memory allocation errors in alloc_listOndrej Zary1-85/+97
If memory allocation fails in alloc_list(), free the already allocated memory and return -ENOMEM. In rio_open(), call alloc_list() first and abort if it fails. Move HW access (set RFDListPtr) out ot alloc_list(). Signed-off-by: Ondrej Zary <linux@rainbow-software.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-20bnx2x: Show port statistics in Multi-functionYuval Mintz1-3/+1
Today, port statistics are being presented when using `ethool -S' only for single-function devices, but there are some port statistics which are crucial for analyzing bottle-necks. E.g., HW Rx discards due to lack of buffer space [when device isn't handling ingress traffic fast enough]. Judging the pros and cons, it was decided that in-order to better support automatic dump-gathering tools, bnx2x should no longer hide those stats. This leaves only VFs lacking the port statistics. Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-20bnx2x: Add new SW stat 'tx_exhaustion_events'Yuval Mintz1-2/+3
Driver already has an internal counter for number of times a given queue had to be stopped due to Tx ring exhaustion. This add the counter to the statistics presented by driver, e.g., by using `ethtool -S'. Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-20ppp: remove PPPOX_ZOMBIE socket stateGuillaume Nault2-3/+3
PPPOX_ZOMBIE is never set anymore. Signed-off-by: Guillaume Nault <g.nault@alphalink.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-20ppp: don't set sk_state to PPPOX_ZOMBIE in pppoe_disc_rcv()Guillaume Nault1-20/+2
Since 287f3a943fef ("pppoe: Use workqueue to die properly when a PADT is received"), pppoe_disc_rcv() disconnects the socket by scheduling pppoe_unbind_sock_work(). This is enough to stop socket transmission and makes the PPPOX_ZOMBIE state uncessary. Signed-off-by: Guillaume Nault <g.nault@alphalink.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-20mlxsw: spectrum: Add error paths to __mlxsw_sp_port_vlans_addIdo Schimmel1-15/+46
The operation of adding VLANs on a port via switchdev ops can fail and we need to be prepared for it. If we do not rollback hardware operations following a failure, hardware and software will remain in an inconsistent state. Solve that by adding suitable error paths to __mlxsw_sp_port_vlans_add. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-20mlxsw: spectrum: Unify setting of HW VLAN filtersIdo Schimmel1-24/+34
When adding or deleting VLANs from a bridged port, HW VLAN filters must be set accordingly. Instead of having the same code in both add and delete functions, just wrap it in a function and call it with the appropriate parameters. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Elad Raz <eladr@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-20mlxsw: spectrum: Use correct PVID value when removing VLANsIdo Schimmel1-10/+8
When removing a range of VLANs in which PVID is a member we should use the correct PVID value instead of some VLAN in the range. Also, change two print statements to use 'dev' instead of 'mlxsw_sp_port->dev', as it's already used in other print statements in the function. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-20net: encx24j600: move rev announcement to probe functionJon Ringle1-12/+12
When encx24j600 is open and closed many times due to userspace polling the interface, the log gets noise with this log message. Moving this to encx24j600_spi_probe function where it belongs. Signed-off-by: Jon Ringle <jringle@gridpoint.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-19Bluetooth: Use hex notation for maskAndrei Emeltchenko1-1/+1
This makes it easier to read and makes code consistent. Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-11-19Bluetooth: Fix mask for H5 header lenAndrei Emeltchenko1-1/+1
Fixes mask when calculating three-wire (h5) length. Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-11-19Bluetooth: Use new hci_skb_pkt_* wrappers for driversMarcel Holtmann21-116/+127
The new hci_skb_pkt_* wrappers are mainly intented for drivers to require less knowledge about bt_cb(sbk) handling. So after converting the core packet handling, convert all drivers. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2015-11-19net: provide generic busy polling to all NAPI driversEric Dumazet12-20/+2
NAPI drivers no longer need to observe a particular protocol to benefit from busy polling (CONFIG_NET_RX_BUSY_POLL=y) napi_hash_add() and napi_hash_del() are automatically called from core networking stack, respectively from netif_napi_add() and netif_napi_del() This patch depends on free_netdev() and netif_napi_del() being called from process context, which seems to be the norm. Drivers might still prefer to call napi_hash_del() on their own, since they might combine all the rcu grace periods into a single one, knowing their NAPI structures lifetime, while core networking stack has no idea of a possible combining. Once this patch proves to not bring serious regressions, we will cleanup drivers to either remove napi_hash_del() or provide appropriate rcu grace periods combining. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-19net: add netif_tx_napi_add()Eric Dumazet10-14/+14
netif_tx_napi_add() is a variant of netif_napi_add() It should be used by drivers that use a napi structure to exclusively poll TX. We do not want to add this kind of napi in napi_hash[] in following patches, adding generic busy polling to all NAPI drivers. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-19net: move skb_mark_napi_id() into core networking stackEric Dumazet12-16/+2
We would like to automatically provide busy polling support to all NAPI drivers, without them having to implement anything. skb_mark_napi_id() can be called from napi_gro_receive() and napi_get_frags(). Few drivers are still calling skb_mark_napi_id() because they use netif_receive_skb(). They should eventually call napi_gro_receive() instead. I will leave this to drivers maintainers. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-19mlx4: remove mlx4_en_low_latency_recv()Eric Dumazet4-198/+2
Busy polling can now be handled in generic NAPI poll infrastructure. This removes complexity and fast path overhead : mlx4 used two spin_lock()/spin_unlock() pair per napi->poll() call in mlx4_en_cq_lock_napi()/mlx4_en_cq_unlock_napi() Tested: Without busy polling : lpaa23:~# echo 0 >/proc/sys/net/core/busy_read lpaa24:~# echo 0 >/proc/sys/net/core/busy_read lpaa23:~# ./netperf -H lpaa24 -t TCP_RR MIGRATED TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to lpaa24.prod.google.com () port 0 AF_INET : first burst 0 Local /Remote Socket Size Request Resp. Elapsed Trans. Send Recv Size Size Time Rate bytes Bytes bytes bytes secs. per sec 16384 87380 1 1 10.00 47330.78 With busy polling : lpaa23:~# echo 70 >/proc/sys/net/core/busy_read lpaa24:~# echo 70 >/proc/sys/net/core/busy_read lpaa23:~# ./netperf -H lpaa24 -t TCP_RR MIGRATED TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to lpaa24.prod.google.com () port 0 AF_INET : first burst 0 Local /Remote Socket Size Request Resp. Elapsed Trans. Send Recv Size Size Time Rate bytes Bytes bytes bytes secs. per sec 16384 87380 1 1 10.00 97643.55 Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-19bnx2x: remove bnx2x_low_latency_recv() supportEric Dumazet4-167/+2
Switch to native NAPI polling, as this reduces overhead and complexity. Normal path is faster, since one cmpxchg() is not anymore requested, and busy polling with the NAPI polling has same performance. Tested: lpk50:~# cat /proc/sys/net/core/busy_read 70 lpk50:~# nstat >/dev/null;./netperf -H lpk55 -t TCP_RR;nstat MIGRATED TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to lpk55.prod.google.com () port 0 AF_INET : first burst 0 Local /Remote Socket Size Request Resp. Elapsed Trans. Send Recv Size Size Time Rate bytes Bytes bytes bytes secs. per sec 16384 87380 1 1 10.00 40095.07 16384 87380 IpInReceives 401062 0.0 IpInDelivers 401062 0.0 IpOutRequests 401079 0.0 TcpActiveOpens 7 0.0 TcpPassiveOpens 3 0.0 TcpAttemptFails 3 0.0 TcpEstabResets 5 0.0 TcpInSegs 401036 0.0 TcpOutSegs 401052 0.0 TcpOutRsts 38 0.0 UdpInDatagrams 26 0.0 UdpOutDatagrams 27 0.0 Ip6OutNoRoutes 1 0.0 TcpExtDelayedACKs 1 0.0 TcpExtTCPPrequeued 98 0.0 TcpExtTCPDirectCopyFromPrequeue 98 0.0 TcpExtTCPHPHits 4 0.0 TcpExtTCPHPHitsToUser 98 0.0 TcpExtTCPPureAcks 5 0.0 TcpExtTCPHPAcks 101 0.0 TcpExtTCPAbortOnData 6 0.0 TcpExtBusyPollRxPackets 400832 0.0 TcpExtTCPOrigDataSent 400983 0.0 IpExtInOctets 21273867 0.0 IpExtOutOctets 21261254 0.0 IpExtInNoECTPkts 401064 0.0 Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-19mlx5: support napi_complete_done()Eric Dumazet3-14/+13
A NAPI poll handler should return number of RX packets processed, instead of 0 / budget. This allows proper busy poll accounting through LINUX_MIB_BUSYPOLLRXPACKETS SNMP counter. napi_complete_done() allows /sys/class/net/ethX/gro_flush_timeout to be used for finer GRO aggregation control. Tested: Enabled busy polling, and checked TcpExtBusyPollRxPackets counter is increasing. echo 70 >/proc/sys/net/core/busy_read nstat >/dev/null netperf -H target -t TCP_RR >/dev/null nstat | grep TcpExtBusyPollRxPackets TcpExtBusyPollRxPackets 490958 0.0 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Eli Cohen <eli@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-11-19mlx5: add busy polling supportEric Dumazet2-0/+8
It is now easy to add busy polling support to a NAPI driver, with very little impact on normal input path. This patch serves as a reference implementation. Note: A followup patch will add proper napi_complete_done() in mlx5, so that LINUX_MIB_BUSYPOLLRXPACKETS snmp counter is properly handled. Tested: Normal TCP_RR results without busy polling : lpk51:~# echo 0 >/proc/sys/net/core/busy_read lpk52:~# echo 0 >/proc/sys/net/core/busy_read lpk51:~# ./netperf -H 192.168.4.52 -t TCP_RR -l 10 MIGRATED TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.4.52 () port 0 AF_INET : first burst 0 Local /Remote Socket Size Request Resp. Elapsed Trans. Send Recv Size Size Time Rate bytes Bytes bytes bytes secs. per sec 16384 87380 1 1 10.00 53509.49 16384 87380 Now enable busy polling : lpk51:~# echo 70 >/proc/sys/net/core/busy_read lpk52:~# echo 70 >/proc/sys/net/core/busy_read lpk51:~# ./netperf -H 192.168.4.52 -t TCP_RR -l 10 MIGRATED TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.4.52 () port 0 AF_INET : first burst 0 Local /Remote Socket Size Request Resp. Elapsed Trans. Send Recv Size Size Time Rate bytes Bytes bytes bytes secs. per sec 16384 87380 1 1 10.00 97530.92 16384 87380 Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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