- 17 Nov, 2016 10 commits
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Vadim Pasternak authored
We are going to add a minimal driver on top of the mlxsw core infrastructure, which will be mainly used for hardware monitoring in Baseboard management controller (BMC) installations. Unlike the switch drivers (e.g., spectrum, switchx2), this driver does not initialize the ASIC and therefore doesn't need to implement the init() and fini() methods in its 'mlxsw_driver' struct. Signed-off-by:
Vadim Pasternak <vadimp@mellanox.com> Reviewed-by:
Ido Schimmel <idosch@mellanox.com> Signed-off-by:
Jiri Pirko <jiri@mellanox.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Vadim Pasternak authored
Add I2C bus implementation for Mellanox Technologies Switch ASICs. This includes command interface implementation using input / out mailboxes, whose location is retrieved from the firmware during probe time. Signed-off-by:
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Vadim Pasternak authored
The mlxsw core infrastructure currently assumes that communication with the ASIC is always possible using Ethernet management datagrams (EMADs), but this is only possible when the PCI bus is used. The bus capability flag is added to indicate EMAD support and make core initialize EMAD communication only when it's set. Otherwise, register access is done using command interface. Signed-off-by:
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Julia Lawall authored
knav_queue_open always returns an ERR_PTR value, never NULL. This can be confirmed by unfolding the function calls and conforms to the function's documentation. Thus, replace IS_ERR_OR_NULL by IS_ERR in error checks. The change is made using the following semantic patch: (http://coccinelle.lip6.fr/) // <smpl> @@ expression x; statement S; @@ x = knav_queue_open(...); if ( - IS_ERR_OR_NULL + IS_ERR (x)) S // </smpl> Signed-off-by:
Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by:
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Xin Long authored
Now sctp transport rhashtable uses hash(lport, dport, daddr) as the key to hash a node to one chain. If in one host thousands of assocs connect to one server with the same lport and different laddrs (although it's not a normal case), all the transports would be hashed into the same chain. It may cause to keep returning -EBUSY when inserting a new node, as the chain is too long and sctp inserts a transport node in a loop, which could even lead to system hangs there. The new rhlist interface works for this case that there are many nodes with the same key in one chain. It puts them into a list then makes this list be as a node of the chain. This patch is to replace rhashtable_ interface with rhltable_ interface. Since a chain would not be too long and it would not return -EBUSY with this fix when inserting a node, the reinsert loop is also removed here. Signed-off-by:
Xin Long <lucien.xin@gmail.com> Acked-by:
Neil Horman <nhorman@tuxdriver.com> Acked-by:
Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by:
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David S. Miller authored
Michael Chan says: ==================== bnxt_en: Updates. New firmware spec. update, autoneg update, and UDP RSS support. ==================== Signed-off-by: -
Michael Chan authored
To display and modify the RSS hash. Signed-off-by:
Michael Chan <michael.chan@broadcom.com> Signed-off-by:
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Michael Chan authored
The newer chips have proper support for 4-tuple UDP RSS. Signed-off-by:
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Michael Chan authored
On some dual port NICs, the speed setting on one port can affect the available speed on the other port. Add logic to detect these changes and adjust the advertised speed settings when necessary. Signed-off-by:
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Michael Chan authored
Use the new FORCE_LINK_DWN bit to shutdown link during close. Signed-off-by:
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- 16 Nov, 2016 30 commits
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Eric Dumazet authored
Callers of netpoll_poll_lock() own NAPI_STATE_SCHED Callers of netpoll_poll_unlock() have BH blocked between the NAPI_STATE_SCHED being cleared and poll_lock is released. We can avoid the spinlock which has no contention, and use cmpxchg() on poll_owner which we need to set anyway. This removes a possible lockdep violation after the cited commit, since sk_busy_loop() re-enables BH before calling busy_poll_stop() Fixes: 217f6974 ("net: busy-poll: allow preemption in sk_busy_loop()") Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
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Rafal Ozieblo authored
New Cadence GEM hardware support Large Segment Offload (LSO): TCP segmentation offload (TSO) as well as UDP fragmentation offload (UFO). Support for those features was added to the driver. Signed-off-by: -
Arnd Bergmann authored
The netdev->real_num_rx_queues setting is only available if CONFIG_SYSFS is enabled, so we now get a build failure when that is turned off: netronome/nfp/nfp_net_common.c: In function 'nfp_net_ring_swap_enable': netronome/nfp/nfp_net_common.c:2489:18: error: 'struct net_device' has no member named 'real_num_rx_queues'; did you mean 'real_num_tx_queues'? As far as I can tell, the check here is only used as an optimization that we can skip in order to fix the compilation. If sysfs is disabled, the following netif_set_real_num_rx_queues() has no effect. Fixes: 164d1e9e ("nfp: add support for ethtool .set_channels") Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Acked-by:
Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by:
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Eric Dumazet authored
Calling napi_hash_del() after netif_napi_del() is pointless. Signed-off-by:
Bert Kenward <bkenward@solarflare.com> Signed-off-by:
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David Lebrun authored
This patch changes the lwtunnel_headroom() function which is called in ipv4_mtu() and ip6_mtu(), to also return the correct headroom value when the lwtunnel state is OUTPUT_REDIRECT. This patch enables e.g. SR-IPv6 encapsulations to work without manually setting the route mtu. Acked-by:
Roopa Prabhu <roopa@cumulusnetworks.com> Signed-off-by:
David Lebrun <david.lebrun@uclouvain.be> Signed-off-by:
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Ido Schimmel authored
The recent merge commit bb598c1b ("Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net") would cause the FIB abort warning to fire whenever we flush the FIB tables - either during module removal or actual abort. Move it back to its rightful location in the FIB abort function. Signed-off-by:
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Andrew Lunn authored
The SPEED_UNFORCED indicates the MAC & PHY should perform auto-negotiation to determine a speed which works. If this is called for, don't set the force bit. If it is set, the MAC actually does 10Gbps, why the internal PHYs don't support. Signed-off-by:
Andrew Lunn <andrew@lunn.ch> Signed-off-by:
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David S. Miller authored
Tom Lendacky says: ==================== amd-xgbe: AMD XGBE driver updates 2016-11-15 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 a possibly uninitialized variable in the debugfs support - Fix the GPIO pin number constraint check This patch series is based on net-next. ==================== Signed-off-by: -
Lendacky, Thomas authored
The GPIO support in the hardware allows for up to 16 GPIO pins, enumerated from 0 to 15. The driver uses the wrong value (16) to validate the GPIO pin range in the routines to set and clear the GPIO output pins. Update the code to use the correct value (15). Reported-by:
Colin Ian King <colin.king@canonical.com> Signed-off-by:
Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by:
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Lendacky, Thomas authored
The debugfs support in the driver uses a common routine to write the debugfs values. In this routine, if the input file position is non-zero then the write routine will not return an error and an output parameter will not have been set. Because an error isn't returned an uninitialized value will be written into a register. Fix the common write routine to return an error if the input file position is non-zero, which will propagate back to the caller. Reported-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
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David S. Miller authored
Florian Fainelli says: ==================== net: Implenent ethtool::nway_reset for a few drivers This patch series depends on "net: phy: Centralize auto-negotation restart" since it provides phy_ethtool_nway_reset as a helper function. The drivers here already support PHYLIB, so there really is no reason why restarting auto-negotiation would not be possible with these. ==================== Signed-off-by: -
Florian Fainelli authored
Implement ethtool::nway_reset using phy_ethtool_nway_reset. We are already using dev->phydev all over the place so this comes for free. Signed-off-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
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Florian Fainelli authored
Implement ethtool::nway_reset using phy_ethtool_nway_reset. We are already using dev->phydev all over the place so this comes for free. Signed-off-by:
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Florian Fainelli authored
Implement ethtool::nway_reset using phy_ethtool_nway_reset. We are already using dev->phydev all over the place so this comes for free. Signed-off-by:
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Florian Fainelli authored
Implement ethtool::nway_reset using phy_ethtool_nway_reset. We are already using dev->phydev all over the place so this comes for free. Signed-off-by:
Tobias Klauser <tklauser@distanz.ch> Signed-off-by:
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Florian Fainelli authored
Utilize the generic phy_ethtool_nway_reset() helper function to implement an autonegotiation restart. Signed-off-by:
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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: -
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:
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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:
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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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