kernel/drivers/net/ethernet/sfc/efx.c, branch linux-4.3.y

sfc: Allow driver to cope with a lower number of VIs than it needs for RSS

2015-08-28T20:53:47Z

Previously, the driver would refuse to load if it couldn't secure enough VIs from the MC to fulfill its RSS requirements. This was causing probe to fail on later functions in configurations where we'd run out of VIs, such as having many VFs. This change allows the driver to load with fewer VIs, down to a minimum of 2. A warning will be printed saying that RSS requirements were not met, possibly affecting performance. efx->max_tx_channels needs to be set to avoid going down the failure path in efx_probe_nic() immediately in the loop after the probe() NIC-type function. Also, Set rc=ENOSPC when bombing out of efx_probe_nic due to lack of VIs. Signed-off-by: Shradha Shah Signed-off-by: David S. Miller

sfc: Report TX completions to BQL after all TX events in interrupt

2015-07-09T07:00:40Z

The limit for BQL is updated each time we call netdev_tx_completed_queue. Without this patch the BQL limit was updated for every TX event we see. The issue was that this only updated the limit to handle the data we complete in two events as the first event wouldn't show that enough traffic had been processed between them. This was OK when interrupt moderation was off but not when it was on as more data had to be completed in a single interrupt. The patch changes this so that we do report the completion to BQL only when all the TX events in the interrupt have been processed. Signed-off-by: Shradha Shah Signed-off-by: David S. Miller

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

2015-06-24T23:49:49Z

Pull networking updates from David Miller: 1) Add TX fast path in mac80211, from Johannes Berg. 2) Add TSO/GRO support to ibmveth, from Thomas Falcon 3) Move away from cached routes in ipv6, just like ipv4, from Martin KaFai Lau. 4) Lots of new rhashtable tests, from Thomas Graf. 5) Run ingress qdisc lockless, from Alexei Starovoitov. 6) Allow servers to fetch TCP packet headers for SYN packets of new connections, for fingerprinting. From Eric Dumazet. 7) Add mode parameter to pktgen, for testing receive. From Alexei Starovoitov. 8) Cache access optimizations via simplifications of build_skb(), from Alexander Duyck. 9) Move page frag allocator under mm/, also from Alexander. 10) Add xmit_more support to hv_netvsc, from KY Srinivasan. 11) Add a counter guard in case we try to perform endless reclassify loops in the packet scheduler. 12) Extern flow dissector to be programmable and use it in new "Flower" classifier. From Jiri Pirko. 13) AF_PACKET fanout rollover fixes, performance improvements, and new statistics. From Willem de Bruijn. 14) Add netdev driver for GENEVE tunnels, from John W Linville. 15) Add ingress netfilter hooks and filtering, from Pablo Neira Ayuso. 16) Fix handling of epoll edge triggers in TCP, from Eric Dumazet. 17) Add an ECN retry fallback for the initial TCP handshake, from Daniel Borkmann. 18) Add tail call support to BPF, from Alexei Starovoitov. 19) Add several pktgen helper scripts, from Jesper Dangaard Brouer. 20) Add zerocopy support to AF_UNIX, from Hannes Frederic Sowa. 21) Favor even port numbers for allocation to connect() requests, and odd port numbers for bind(0), in an effort to help avoid ip_local_port_range exhaustion. From Eric Dumazet. 22) Add Cavium ThunderX driver, from Sunil Goutham. 23) Allow bpf programs to access skb_iif and dev->ifindex SKB metadata, from Alexei Starovoitov. 24) Add support for T6 chips in cxgb4vf driver, from Hariprasad Shenai. 25) Double TCP Small Queues default to 256K to accomodate situations like the XEN driver and wireless aggregation. From Wei Liu. 26) Add more entropy inputs to flow dissector, from Tom Herbert. 27) Add CDG congestion control algorithm to TCP, from Kenneth Klette Jonassen. 28) Convert ipset over to RCU locking, from Jozsef Kadlecsik. 29) Track and act upon link status of ipv4 route nexthops, from Andy Gospodarek. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1670 commits) bridge: vlan: flush the dynamically learned entries on port vlan delete bridge: multicast: add a comment to br_port_state_selection about blocking state net: inet_diag: export IPV6_V6ONLY sockopt stmmac: troubleshoot unexpected bits in des0 & des1 net: ipv4 sysctl option to ignore routes when nexthop link is down net: track link-status of ipv4 nexthops net: switchdev: ignore unsupported bridge flags net: Cavium: Fix MAC address setting in shutdown state drivers: net: xgene: fix for ACPI support without ACPI ip: report the original address of ICMP messages net/mlx5e: Prefetch skb data on RX net/mlx5e: Pop cq outside mlx5e_get_cqe net/mlx5e: Remove mlx5e_cq.sqrq back-pointer net/mlx5e: Remove extra spaces net/mlx5e: Avoid TX CQE generation if more xmit packets expected net/mlx5e: Avoid redundant dev_kfree_skb() upon NOP completion net/mlx5e: Remove re-assignment of wq type in mlx5e_enable_rq() net/mlx5e: Use skb_shinfo(skb)->gso_segs rather than counting them net/mlx5e: Static mapping of netdev priv resources to/from netdev TX queues net/mlx4_en: Use HW counters for rx/tx bytes/packets in PF device ...

sfc: mark state UNINIT after unregister

2015-06-16T02:55:01Z

Without this change, modprobe -r sfc hits the BUG_ON() in efx_pci_remove_main(). Fixes: e7fef9b45ae1 ("sfc: add sysfs entry to control MCDI tracing") Reported-by: Jarod Wilson Reviewed-by: Jarod Wilson Signed-off-by: Edward Cree Signed-off-by: David S. Miller

sfc: leak vports if a VF is assigned during PF unload

2015-06-02T19:57:32Z

If any VF is assigned as the PF is unloaded, do not attempt to remove its vport or the vswitch. These will be removed if the driver binds to the PF again, as an entity reset occurs during probe. A 'force' flag is added to efx_ef10_pci_sriov_disable() to distinguish between disabling SR-IOV and driver unload. SR-IOV cannot be disabled if VFs are assigned to guests. If the PF driver is unloaded while VFs are assigned, the driver may try to bind to the VF again at a later point if the driver has been reloaded and the VF returns to the same domain as the PF. In this case, the PF will not have a VF data structure, so the VF can check this and drop out of probe early. In this case, efx->vf_count will be zero but VFs will be present. The user is advised to remove the VF and re-create it. The check at the beginning of efx_ef10_pci_sriov_disable() that efx->vf_count is non-zero is removed to allow SR-IOV to be disabled in this case. Also, if the PF driver is unloaded, it will disable SR-IOV to remove these unknown VFs. By not disabling bus-mastering if VFs are still assigned, the VF will continue to pass traffic after the PF has been removed. When using the max_vfs module parameter, if VFs are already present do not try to initialise any more. Signed-off-by: Shradha Shah Signed-off-by: David S. Miller

sfc: force removal of VF and vport on driver removal

2015-06-02T19:57:31Z

When the driver unloads, force the unbind and removal of any VFs in the host with the PF. The PF cannot remove vports and vswitches if they are still being used by a VF driver, and when unloading the sfc driver the removal order is not guaranteed, so the instruction from the PF to the VF to unbind enforces a suitable ordering so that vswitches and vports can be removed. As a result of this, manually unbinding the driver from a single PF will result in all of its VFs in the host also being removed. Signed-off-by: Shradha Shah Signed-off-by: David S. Miller

sfc: Implement ndo_gets_phys_port_id() for EF10 VFs

2015-06-02T19:57:26Z

Signed-off-by: Shradha Shah Signed-off-by: David S. Miller

sfc: add sysfs entry to control MCDI tracing

2015-05-27T17:54:51Z

MCDI tracing is enabled per-function with a sysfs file /sys/class/net//device/mcdi_logging Signed-off-by: Edward Cree Signed-off-by: David S. Miller

sched/topology: Rename topology_thread_cpumask() to topology_sibling_cpumask()

2015-05-27T13:22:15Z

Rename topology_thread_cpumask() to topology_sibling_cpumask() for more consistency with scheduler code. Signed-off-by: Bartosz Golaszewski Reviewed-by: Thomas Gleixner Acked-by: Russell King Acked-by: Catalin Marinas Cc: Benoit Cousson Cc: Fenghua Yu Cc: Guenter Roeck Cc: Jean Delvare Cc: Jonathan Corbet Cc: Linus Torvalds Cc: Oleg Drokin Cc: Peter Zijlstra Cc: Rafael J. Wysocki Cc: Russell King Cc: Viresh Kumar Link: http://lkml.kernel.org/r/1432645896-12588-2-git-send-email-bgolaszewski@baylibre.com Signed-off-by: Ingo Molnar

sfc: set the MAC address using MC_CMD_VADAPTOR_SET_MAC

2015-05-21T22:43:55Z

Add a set_mac_address() NIC-type function for EF10 only, and use this to set the MAC address on the vadaptor. For Siena and earlier, the MAC address continues to be set by MC_CMD_SET_MAC; this is still called on EF10, and including a MAC address in this command has no effect. The sriov_mac_address_changed() NIC-type function is no longer needed on EF10, but it is needed for Siena where it is used to update the peer address of the PF for VFDI. Change this to use the new set_mac_address function pointer. efx_ef10_sriov_mac_address_changed() is no longer called, as VFs will try to change the MAC address on their vadaptor rather than trying to change to the context of the PF to alter the vport. When a VF is running in direct passthrough mode with MAC spoofing enabled, it will be able to change the MAC address on its vadaptor. In this case, there is a link to the PF, so find the correct VF in its ef10_vf array and update the MAC address. ndo_set_mac_address() can be called during driver unload while bonding, and in this case the device has already been stopped, so don't call efx_net_open() to restart it after reconfiguration. efx->port_enabled is set to false in efx_stop_port(), so it is indicator of whether the device needs to be restarted. Signed-off-by: Shradha Shah Signed-off-by: David S. Miller