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Solarflare 4.X Linux network driver
===================================
Version: 4.5.1.1026
Overview
--------
This package is the Linux NET driver source RPM for Solarflare Server
Adapters.
Supported hardware platforms
----------------------------
The drivers contained in this package support the following Solarflare
adapters:
- Solarflare Flareon Server Adapters:
- Solarflare SFN7002F Dual Port SFP+ Server Adapter
- Solarflare SFN7122F Dual Port SFP+ Server Adapter
- Solarflare SFN7142Q Dual Port QSFP+ Server Adapter
- Solarflare SFN7322F Precision Time Synchronization Server Adapter
- Solarflare Onload Server Adapters:
- Solarflare SFN6122F Dual Port SFP+ Server Adapter
- Solarflare SFN6322F Precision Time Synchronization Server Adapter
- Solarflare SFN6832F SFP+ Mezzanine Adapter
- Solarflare SFN5322F Precision Time Synchronization Server Adapter
- Solarflare SFN5122F Dual Port SFP+ Server Adapter
- Solarflare SFN5121T Dual Port 10GBASE-T Server Adapter
- Solarflare SFN5802K Mezzanine Adapter (for HP BladeSystem c-Class)
- Solarflare SFN5812H/SFN5814H Mezzanine Adapter (for IBM BladeCenter)
- Solarflare AOE Adapters:
- Solarflare SFA6902F SFP+ AOE Adapter
- Solarflare Performant Server Adapters:
- Solarflare SFN5151T 10GBASE-T Server Adapter
- Solarflare SFN5152F SFP+ Server Adapter
- Solarflare SFN5161T Dual Port 10GBASE-T Server Adapter
- Solarflare SFN5162F Dual Port SFP+ Server Adapter
- The following OEM adapters are also supported, but note each OEM may recommend
a different driver version to match the version used for testing/qualification
- HP Ethernet 10Gb 570FLB Adapter
- HP Ethernet 10Gb 570M Adapter
Building and installation
-------------------------
To build a binary RPM for the running kernel type:
rpmbuild --rebuild <source rpm filename>
To install the resulting binary rpm:
Locate the file that was created in the preceding step, prefixed with the
annotation "Wrote:", then type:
rpm -Uvh <binary rpm filename>
To ensure that the correct version of the driver is loaded into the current
kernel
/sbin/modprobe -r sfc
/sbin/modprobe sfc
Installation of the driver can be confirmed by typing:
modinfo sfc | grep version
and checking for the line:
version: 4.4.1.1017
All network interfaces available on the system can be found with:
ifconfig -a
Driver updates
--------------
The latest version of this driver can always be downloaded from
<https://support.solarflare.com/>.
Documentation
-------------
For detailed instructions of how to install and configure the Linux driver
please refer to the "Solarflare Server Adapter User's Guide"
(part number SF-103837-CD) which is available as a PDF from
<https://support.solarflare.com/>.
Linux distribution support for Solarflare Adapters
--------------------------------------------------
RHEL6 and SLES11 have in-built Solarflare adapter drivers but these
drivers may not support the latest SFN7XXX adapters.
It is recommended to install the latest Solarflare supplied drivers.
Support
-------
Please contact your local Solarflare support representative or email
<support@solarflare.com>.
NIC partitioning, SR-IOV and PF-IOV modes on SFN7XXX adapters
-------------------------------------------------------------
This release of the Solarflare Linux Net driver supports NIC partitioning
(multiple PFs) and SR-IOV (VFs).
See "Solarflare Server Adapter User's Guide" SF-103837-CD Issue >=12
available from https://support.solarflare.com for more detailed information
on setting up NIC partitioning, SR-IOV or PF-IOV modes.
Some additional details as well as known issues are documented below:
General:
~ NIC partitioning/SRIOV/PF-IOV features require sfutils >=v4.3.0.1010 which
contains adapter firmware v4.2.1.1014 and firmware-variant=full-feature
(setup with sfboot)
~ Please note that Hybrid SR-IOV support for SFN5XXX|6XXX drivers is now
deprecated. Please use an older driver to continue using this feature.
~ Link control (e.g. setting pause frames with ethtool and controlling MTU) is
only available on the first PF on each port; (this is referred to as "PF0"
or the "primary PF")
~ Only link control functions have the full MAC statistics available to them
(via ethtool -S). All statistics that come from the MAC are now prefixed
"port_" as they refer to a single physical network port.
All other functions have statistics which show the number of packets and
bytes both received and transmitted by that function, classified into
unicast, multicast and broadcast traffic.
~ MTD partitions are only exposed from PF0 on each port, hence the utilities
sfupdate, sfboot and sfkey need to be run where they have access to PF0.
~ It is now possible to identify which physical port an interface is bound to.
See /sys/class/net/<interface>/device/physical_port (note this is zero
based whereas the identifiers printed on the adapter brackets are one based)
~ The driver supports the use of shared RSS indirection tables, after the
16 unique hardware RSS indirection tables entries have been consumed.
~ In order for active-backup bonding to work, the slave interface normally
takes the MAC address of the master interface. Only PF0 is allowed to
change its MAC address. Therefore for this to work with other functions it
is necessary to set "sfboot mac-spoofing=enabled". An alternative is to
set the bonding module option "fail_over_mac" and allow the gratuitous ARP
to inform the other link partners of the change in MAC address.
~ At this time PTP will only work with the PF0 on each port and will
not work with a VF.
NIC partitioning support on SFN7XXX adapters:
~ The sfc.ko driver will bind to multiple PFs on the same physical adapter
port and create a network interface for each PF.
~ Configure with "sfboot switch-mode=partitioning pf-count=X" and cold reboot
the server if warned to do so.
~ If using NIC partitioning in the same layer2 broadcast domain you may
need the kernel parameter "arp_ignore=2" as linux will reply to ARP
on any interface. This might cause traffic to go over unexpected interfaces.
~ If using NIC partitioning with VLANs all PFs must be on a unique VLAN
(which can include VLAN 0). Traffic that is sent/received from this PF will
have VLAN tags transparently inserted/stripped by the adapter. A single PF
on each port can be on VLAN0 where it will both receive and transmit
untagged traffic.
~ Configure NIC partitioning with VLANs using
"sfboot pf-vlans=<VLAN>,<VLAN>..."
~ Do not use LACP bonding modes when using NIC partitioning as the LACP
partner (switch) will not be aware of the partitioning.
~ The driver parameter "num_vis" is now more important. This controls how many
extra VIs (RX/TX/event rings) are allocated for the use of onload on each
PF. If not using onload you may wish to set "num_vis=0" so that there
are no false resource limitations when using multiple PFs.
~ When PF0 is put into promiscuous mode it will receive traffic for its own
MAC address as well as any other incoming traffic that does not match
another PF's MAC address. For other PFs there is no change in received
traffic if the interface is put into promiscuous mode.
SR-IOV support on SFN7XXX adapters:
~ The sfc.ko driver will bind to all VFs and create network interfaces.
~ Configure with "sfboot switch-mode=sriov pf-count=1 vf-count=X" and cold
reboot the server if warned to do so.
~ RHEL6.5 and RHEL7 are supported for the host/hypervisor OS.
~ It is possible to consume the VFs using these KVM/libirt modes:
- network hostdev (VF passed into the VM; migration is only possible if
the VF is hot-unplugged)
- direct-passthrough (macvtap interface used over the VF and virtio-net
driver used in the VM guest)
~ Note that VFs will initially be assigned random MAC addresses, but libvirt
(and ip link) can override the MAC address.
~ A VF in a VM will be unable to set its own MAC address. See the item on
active-backup bonding.
~ To enable VFs (for RHEL6.5 and RHEL 7)
echo <num vfs> > /sys/class/ethX/device/sriov_numvfs
~ To enable VFs on older operating systems set the sfc.ko module parameter
"max_vfs". If set to a single integer this is the number of VFs to enable
and will apply to all PFs. If you wish to configure this to be a different
value for each PF set this to a comma separated list.
~ Please ensure that you enable all BIOS settings that refer to virtualization
and SR-IOV (note there might be several e.g. SRIOV, IOMMU, VT, VT-x, VT-d,
IO virtualization)
~ Solarflare recommends setting "pci=realloc" as a kernel parameter
(e.g. in /boot/grub/grub.conf). This allows the kernel to reprogram the
initial BIOS PCI apertures in case PCI aperture space for the VFs is not
assigned by the BIOS.
~ To view which VFs are associated with which PFs and the VF MAC addresses
please use "ip link show"
~ A PF put into promiscuous mode will not see the traffic to/from a VF.
~ A VF put into promiscuous mode will not see any additional traffic.
~ Setting VF MAC/VLANs/link state is possible via the ip command
(or libvirt configuration). From "ip link help"
"ip link set { dev DEVICE}
[ vf NUM [ mac LLADDR ]
[ vlan VLANID ]
[ state { auto | enable | disable} ] ]"
~ Setting VF spoofcheck/rate/qos (e.g. via the ip command) is not supported
at this time.
SR-IOV with NIC partitioning mode support on SFN7XXX adapters:
~ This mode offers partitioning of the adapter. Each partition is on a unique
VLAN and within this layer2 broadcast domain there is switching on the
adapter between the PF and VFs.
~ This support is currently considered EXPERIMENTAL i.e. all features are
present, but there has only been limited testing. Solarflare will support
the use of this feature in a test environment, but does not recommend use
in a production environment until this feature becomes GA.
Note that both SR-IOV and NIC partitioning as individual features are both
considered GA quality.
~ Ensure you are using adapter firmware >= v4.4.2.1011
~ It is necessary to configure NIC partitioning with unique VLANs in this mode
~ Configure with:
"sfboot switch-mode=partitioning-with-sriov \
pf-count=X pf-vlans=<VLAN>[,<VLAN>]... \
vf-count=Y"
and cold reboot the server if warned to do so.
PF-IOV mode support on SFN7XXX adapters:
~ This mode offers switching between PFs. Use this mode where a server does
not support SR-IOV (otherwise please use SR-IOV mode as this provides up-to
240VFs versus only 16PFs)
~ Configure with "sfboot switch-mode=pfiov pf-count=X" and cold reboot the
server if warned to do so.
~ In RHEL7 passing through a PCI function uses the new VFIO mechanism.
Due to a missing capability flag on SFN7XXX hardware, VFIO will only allow
all PFs to be passed into a guest together. This will be addressed with a
kernel quirk.
Known issues with the platform (KVM/libvirt/kernel)
---------------------------------------------------
~ libvirt direct-bridged mode on-top of a VF is not supported. Please use
libvirt direct-bridged mode over a PF or direct-passthrough mode with VFs.
Issue 46876:
~ Multicast does not work in libvirt direct-passthrough mode.
This is because the multicast address list is not propagated to the network
interface below the macvtap driver. Without this the sfc.ko driver is unable
to program the adapter switch to efficiently replicate multicast traffic to
only the subscribed functions. Solarflare will work with upstream to find a
solution to this issue.
Issue 47742:
~ IPv6 traffic does not pass in direct-bridged and direct-passthrough modes.
In direct-passthrough mode multicast neighbour solicitation fails as per the
previous point.
In direct-bridged mode this is because an interface calculates an IPv6 link
address based on its MAC address. There will be a neighbour solicitation
multicast filter in the host, but when a global address is assigned in the
VM guest, a multicast filter corresponding to the new global address is not
inserted in the host because macvtap doesn't propagate this information.
Issue 46948:
~ The macvtap driver does not propagate the link state from the real network
interface. This means that it is not possible to use bonded interfaces that
use link state detection (miimon). Instead please use ARP probes. This
affects libvirt direct-bridged and direct-passthrough modes.
Issue 47490:
~ Bad interactions can occur with NetworkManager scripts when it sees
new VFs with random MAC addresses. Alternatively use the older networking
service/scripts.
Issue 53477: Redhat BZ 1222066:
~ Currently if pf-count>8 only the lower 8 PF function numbers can be
successfully passed into a guest. Note that Solarflare recommends using
VFs where possible to pass PCI functions into guest VMs.
Known Issues with Solarflare driver/firmware
--------------------------------------------
Issue 41550: SF-113649-KI:
~ allmulti mode is now correctly supported when using adapter firmware
>=v4.4.2.1011 and "sfboot firmware-variant=full-feature"
In other cases only multicast traffic which is not being received by other
VFs or PFs will be received by the allmulti interface.
~ The lack of a proper allmulti mode could be an issue if subscribing to a
very large number of multicast groups where the number of hardware filters
is exceeded.
Issue 48214: SF-113650-KI:
~ SARFS/SXPS is not compatible with changes in linux >=3.0 and has been
disabled in this release. In this case please use the kernel ARFS/XPS
features.
Issue 50308:
~ For RHEL 7.0 disabling GRO after passing traffic is unsafe, and can lead to
a kernel NULL pointer deference. This is believed to be addressed by Redhat
in RHEL 7.1. This will only happen when LRO is also disabled. For
configurations that disable GRO and LRO, please disable GRO after the driver
is loaded, but before the interface is brought up.
Issue 50868:
~ If using a SFN7142Q adapter with adapter firmware v4.1.0.6742 and running
sfupdate, after the update the two network interfaces from the second QSFP+
port will be in a disabled state. Please reload the driver to correct this.
This issue has been resolved in adapter firmware >=v4.1.1.1022.
Issue 50873:
~ Changing the MTU on a network team in RHEL 7 can cause a hang. As a
workaround please change the MTU of the component interfaces before
creating the team.
Changelog
---------
### v4.5.1.1026 -- Update release
[General changes]
~ Support for SFA7942Q AOE platform.
~ Support for linux v4.2.
~ Make locking between NAPI and busy-polling less expensive.
[Stratus ftServer support]
~ Further work to remove warnings if device isolation and fail-over occurs.
~ Fix infinite loop in efx_pause_napi() on module unload if a hardware fault
causes the driver to enter a disabled state and onload is being used.
Issue 54445:
~ Address "NOHZ: local_softirq_pending 08" seen on sfc.ko module unload.
Issue 54748:
~ When sfc.ko module parameters rss_numa_local=1 and rss_cpus is
greater than the number of logical CPUs on a node, remove the false
limitation that onload could only use interrupts on the local NUMA node.
Issue 54840:
~ Fix efx_ef10_filter_is_exclusive() did not identify the ethertype and
IP-protocol filters.
Issue 55443:
~ Fix rare case where after several attempts to allocate memory in order to
refill the RX descriptor ring fails the driver does not continue to retry.
This causes the ethtool stat "rx_nodesc_drops" to increase.
Issue 56015:
~ Fix potential NULL pointer deference in efx_mcdi_mon_remove().
### v4.5.1.1010 -- Feature release
[General changes]
~ Kernel compat support for v4.0.0.
~ Support ethtool filters on IP protocol.
~ Allow setting and querying the RSS hash key through ethtool interface.
~ Implement ethtool -l|--show-channels.
~ Add known good default RSS (Topelitz) key (vs. using a random key) and add a
module parameter 'rss_use_fixed_key' (default:1)
~ Rework allocation of TX queues to allow driver to take advantage of
upcoming firmware performance improvements on SFN7142Q adapters in 2*40G
mode.
[Stratus ftServer support]
~ Introduce support for Stratus ftServers (including polite and impolite
removal cases). Driver module parameter 'monitor_interval_ms'
(default 200ms) is used to test see if a PCIe isolation event has occurred.
~ Please use the version of the driver that is supplied by Stratus that has
been fully qualified for your ftServer.
[General fixes]
Issue 52542:
~ Fix rare 'kernel BUG at include/linux/skbuff.h:1485 in efx_rx_mk_skb+0x418/0x440'
seen with RHEL7 by filling the skb_cache before initialising the Rx queue.
Issue 52296:
~ Add timeout in efx_mcdi_acquire_sync() and print a warning on failure.
Issue 44816:
~ Fix possible ARFS duplicate flows with the same ID causing the error
'MC command 0x8a inlen 12 failed rc=-22 (raw=22) arg=2' by tracking
RPS flow IDs per channel instead of per function
[PTP fixes]
Issue 47477:
~ If adapter has no PTP license then display "no PTP support" instead of the
obscure message "MC command 0xb failed".
Issue 45960:
~ fix sfptpd warnings seen when SolarCapture started with ptp=1 and then
exited by correcting RX filter insertion actions required in this use-case.
[Onload fixes]
Issue 52368:
~ [onload] disable and re-enable NAPI more safely during driverlink
unregister.
Issue 52324:
~ [onload] Fix NULL pointer dereference in Onload efrm_pd_alloc() after
passing a device into a VM guest.
Issue 51102:
~ [onload/EFVI] don't try to insert mismatch or broadcast filters when in
kernel-block mode. This would cause warnings "X filter insert failed"
Issue 50721:
~ [onload] Reduce size of initial EF10 memory mapping in preparation of
future Onload support on Stratus servers
Issue 50320:
~ Fix possible 'rcu_preempt self-detected stall' warnings seen where the
stack trace includes 'efx_dl_handle_event' by obeying NAPI budget
accounting for work done in driverlink events.
[Build and kernel compat fixes]
Issue 53241:
~ Build fix for 64bit PHC operations
'ptp.c:2187: error: unknown field 'gettime' specified in initializer'
Issue 53103:
~ Build fix for 3.181.11
error: 'struct pci_dev' has no member named 'physfn'
Issue 52632:
~ Fix build issue when CONFIG_SFC_SRIOV is not set.
'error: 'struct efx_ef10_nic_data' has no member named 'vf''
Issue 52404:
~ Build fix when CONFIG_PCI_IOV is not set to avoid the error
'error: 'efx_sriov_get_phys_port_id' undeclared here (not in a function)'
Issue 52379:
~ Improve kcompat for 3.18.10 that caused
'error: implicit declaration of function 'set_cpus_allowed''
Issue 52371:
~ add RHEL5 kernel compat for IS_ERR_OR_NULL used in efx_init_debugfs_netdev()
Issue 51721:
~ Avoid the following warning on RHEL7.1
'WARNING: at net/core/dev.c:5450 register_netdevice+0x1cc/0x410()'
Issue 51627:
~ Build fix for 'sfc_minimal=1' which gave the error
'struct efx_tx_queue' has no member named 'sarfs_update'
Issue 51443:
~ Build fix in mcdi_proxy.c for kernels without CONFIG_NET_NS set.
'error: 'struct net_device' has no member named 'nd_net''
Issue 50816:
~ kcompat changes to resolve 'ethtool -K eth2 rx off' failures on RHEL6.6
Issue 42338:
~ Build fix to use pci_enable_msix_range() instead of pci_enable_msix() for
latest kernels.
### v4.4.1.1017 -- Feature release
New features:
~ Support for an access control daemon to control multicast subscriptions
(please contact Solarflare support for more details of how to use this).
~ Performance improvements.
- enable rss_numa_local by default
- set the default rx_recycle_ring_size to 512
- set rx_copybreak default to 192
- Reduce lumpiness of the sarfs hash function
- Avoid GRO path for small packets so that data is copied.
- Change to fixed RX recycle ring
- Support RX descriptor reposting.
- Replace atomic_set() with atomic_add() when incrementing rx_buf page
- Add compiler hints to reduce icache miss rate for efx_enqueue_skb()
- Move re-enable of TX path to end of napi poll loop
~ Experimental support for NIC partitioning + SRIOV used simultaneously.
~ Support setting the MAC and VLAN of a VF via the PF (via the "ip" command)
Issue 48262:
~ Avoid inserting unicast filters when kernel is blocked (Solarcapture/EF-VI)
Issue 48771:
~ Support SFF8472 diagnostics for SFP+ modules connected via QSFP.
Issue 48310:
~ Allow tx_copybreak=0 to disable this feature.
Issue 49178/49179:
~ enable cascaded multicast filters in adapter firmware (if present).
Issue 48910:
~ [SFN5/6XXX] Fix regression "num_vis=-1" was exporting no VIs to onload.
Issue 45957:
~ kernel 3.18 and 3.19 compatibility.
Issue 49573:
~ Implement destination port/ip filtering option for SARFS.
~ Add debugfs counter for the number of updates to filters that have been
requested from tx_queue.
Issue 48771:
~ Pass QSFP module information through the driver to ethtool.
Issue 50830:
~ Fill in rxhash correctly in LRO and non-receive offload paths.
Issue 49577:
~ Fix rare crash when inserting hardware filters using ethtool.
Issue 50992:
~ Fix issue where "ip link show" gives wrong mac address for vfs in direct
passthrough mode, by updating the PF's record of the VF's MAC address if
possible.
Issue 49598:
~ Reduce the frequency and verbosity of messages generated from (expected)
denied firmware requests by unprivileged PFs/VFs.
~ Make failed filter removal less noisy after an MC reset.
### v4.2.2.1016 -- Feature release
First release supporting NIC partitioning, SR-IOV and PF-IOV modes on SFN7XXX
adapters. This support requires sfutils >=v4.3.0.1010 which contains adapter
firmware v4.2.1.1014 and firmware-variant=full-feature (setup with sfboot)
General changes:
~ the old module parameter "enable_multi_pf" has been removed as NIC
partitioning (with multiple PFs) is now fully supported by this driver
~ add sysfs entry and module parameter to control MCDI tracing between
the driver and the adapter firmware. This is an extra debug feature that is
for the use of Solarflare support.
Issue 44671:
~ Work around TRIGGER_INTERRUPT command not being supported on SFN7142Q.
Issue 44372:
~ Disable RSS on packed stream firmware variant (used for SolarCapture) as it
is not supported
Issue 44737:
~ Increase BIST mode timeout from 10s to 30s to accommodate longer SFN7142Q
BIST operations.
Issue 46845:
~ remove bogus __GFP_COLD flag in page allocation to improve performance.
Issue 47102:
~ replace get_page() with atomic_set() to improve performance.
Issue 44509:
~ PTP. Fix logical error in efx_ptp_restart()
Issue 44510:
~ PTP. To increase robustness, efx_ptp_change_mode() should always disable
PTP in the firmware if disable is requested even if the driver believes that
PTP is already stopped
Issue 47551:
~ Only fallback to lower interrupt mode if the lower mode is supported.
Issue 47169:
~ Kernel compat fixes for RHEL 6.6
Issue 47339:
~ Kernel compat for linux 3.16.
Issue 47268:
~ Allow for a smaller RX ring to be configured (minimum of 128 reduced to 16)
Issue 47603:
~ Move selection of SXPS from compile time to run time.
### v4.1.2.1003 -- Feature release
New features to support the SolarCapture 1.3 release:
~ New forward_fcs attribute in sysfs which when enabled, causes the driver to
not strip CRCs on ingress path. When enabled frames with bad CRCs are not
discarded. Changing forward_fcs requires reconfiguring the adapter's MAC
~ Disable ARFS if the required adapter filter flags are not supported
~ Disable RSS on Packed Stream firmware variant
Other new features:
~ Add sysfs entry to control MCDI tracing
~ Add module parameter to enable MCDI logging on new functions
Issue 45309:
~ Take mac_lock when setting or unsetting the kernel block (from EFVI or
onload) in order to avoid races in sync_rx_mode.
Issue 44095:
~ change EFX_BUG_ON_PARANOID on mcdi failure in ptp_synchronize to a proper
error path.
Issue 43849:
~ recheck mcdi->state after timeout in efx_mcdi_await_completion
Issue 42806:
~ handle nonlinear SKBs in efx_filter_rfs()
Issue 45444:
~ fix calling of free_irq with already free vector
Issue 40785:
~ add module option "underreport_skb_truesize" to falsify skb->truesize for
LRO packets
Issue 43391:
~ use __GFP_NOWARN when allocating RX pages from atomic context.
Issue 44829:
~ don't BUG_ON efx->max_channels == 0 in probe
Issue 46587:
~ Add RW semaphore to protect against MCDI timeouts in
efx_ef10_filter_table_remove() which could cause a kernel panic in
efx_ef10_filter_table_restore(). There should not be MCDI timeouts seen
in production systems so this is a defensive fix rather than a bug fix.
### v4.1.0.6734 -- Feature release
New Features:
~ Add support for busy polling available in Linux 3.11.
See section 1.8 of http://kernelnewbies.org/Linux_3.11
Note that only connect()'ed sockets can make use of this latency reducing
feature.
~ Implement SARFS; Solarflare Accelerated Receive Flow Steering
(disabled by default) This inserts hardware RX filters in order to direct
flows back to the same CPU where the user-land process is transmitted. This
should help cache locality.
This feature can be used when Accelerated RFS is not available in the
currently running kernel, and if ARFS is in use will be disabled.
To enable SARFS, set the "sarfs_sample_rate module" parameter to non-zero.
20 is recommended.
In addition, some form of XPS is needed for SARFS to function correctly. The
easiest way to do this is to enable Solarflare XPS by setting the module
parameter "sxps_enabled=1"
Alternatively if your kernel supports it you can enable XPS by following the
instructions at:
https://www.kernel.org/doc/Documentation/networking/scaling.txt
or in the Solarflare Adapter User Guide (SF-103837-CD)
section 3.20 Performance Tuning on Linux
~ 7xxx: Add support for SFC9140 40G QSFP network controller silicon.
(network adapter part number SFN7142Q).
~ Preferentially affinitise interrupts to CPUs on the NUMA node local to the
adapter and restrict RSS to only local CPUs (disabled by default).
To enable this feature set the module parameter "rss_numa_local=1"
~ add RX hook for driverlink to allow Solarsecure Filter Engine to inspect
packets.
PTP issues/features:
Issue 35011:
~ PTP: Use net_ratelimit() for PTP event queue overflow messages.
Issue 41277:
~ PTP: Advertise translated hardware timestamps.
Issue 41479:
~ PTP: Remove warning when synchronize operation gets no usable samples.
Issue 38893:
~ PTP: Avoid assumptions about skb header area length in efx_ptp_rx()
~ PTP: Remove two redundant efx_ptp_synchronize() calls
~ PTP: Fix preprocessor conditions using EFX_HAVE_PHC_SUPPORT
~ PTP: Always request 'enhanced' PTPv2 filtering on Siena
~ PTP: Switch back to the original PTP clock adjustment operation
Issue 41335:
~ PTP: Accept fake PPS events whether or not packet timestamping of PTP
packets is enabled in the NIC. This allows phc2sys to be used without
requiring linuxptp to be running
Issue 42466:
~ PTP: check for NULL efx->ptp_data in efx_ptp_event
Issue 42956:
~ PTP: Test for ethtool get_ts_info support directly
Issue 41055:
~ PTP: Check for non-PTP or non-primary function in private clock ioctls
~ In some cases this could cause a kernel NULL pointer dereference in
efx_ptp_ts_settime() when calling ioctl(SIOCSHWTSTAMP)
Issue 41022:
~ PTP: Fix kernel NULL pointer dereference in efx_hard_start_xmit() that could
be caused if hardware timestamping on raw sockets were enabled.
Issue 40999:
~ PTP: Expose ptp_caps on primary function, not all functions on port 0
Issue 42321:
~ 7xxx: PTP. Fix issue that can cause firmware watchdog to expire while host
compares system and NIC clocks.
Driver support for OpenOnload / EFVI / SolarSecure Filtering Engine:
Issue 40538:
~ onload: multicast loopback: net_driver filter support
~ onload: net_driver filter support for stack_id
Issue 41295:
~ Updates driver link filter_block_kernel API (used by onload and EFVI apps)
to have a unicast/multicast split, to allow for a closer match to previous
semantics.
Issue 41992:
~ Sanity check filter specs when inserting from driverlink clients.
General Issues / Features / Improvements:
Issue 40635:
~ Remove use of procfs in net driver when CONFIG_DEBUG_FS not defined.
Issue 41727:
~ Pass correct pointer to free_irq() on failure path
Issue 41197:
~ added ioctl support for MCDI licensed app state call used by "sfkey" utility
Issue 41248:
~ netif_device_detach in efx_schedule_reset so the tx watchdog won't fire
while we're waiting for reset.
Issue 42437:
~ use ether_addr_copy and similar helpers.
Issue 37976:
~ On MCDI timeout, issue an FLR (and mark MCDI to fail-fast)
Issue 42757:
~ Fix TX DMA errors seen when using module parameter "separate_tx_channels=1"
Issue 42199:
~ allow PIO more often as PIO conditionals were incorrectly sensitive to some
cleanup actions performed during hardware setup.
Issue 40373:
~ rewrite pcie_enable_error_reporting error to be less alarming
(normally when AER cannot be enabled as the platform firmware is handling
this)
Issue 39820:
~ Don't count discarded packets as checksum errors as well.
Issue 39528:
~ Improve 'Fatal error' logs which occur when MC reboot is detected
Issue 43431:
~ Make ethtool_set_flags understand rxvlan and txvlan offload options
~ This is needed allow ethtool -K to operate on RHEL 6.5
Issue 41279:
~ Fix reporting of MC BIST results through ethtool
Now 1=>pass, 0=>not run, <0 fail
Issue 41791:
~ 5xxx/6xxx: Fix over-accounting of buffer table space for virtual functions
Issue 37075:
~ 7xxx: MAC stats (incl loopback) reported per vadapter
Issue 41673:
~ 7xxx: Update link fault reporting
### v4.0.2.6628.1 -- Hot-fix release
~ use 64-bit writes for PIO as 32bit PIO writes to write-combined mappings
can, in very rare circumstances cause data corruption (before TCP checksum
offload occurs).
Restrict PIO to x86_64 systems.
### v4.0.2.6628 -- Feature release
Add support for RX time-stamping and PTP on SFN7XXX family adapters:
~ This release provides the driver support necessary for both the
Solarflare Enhanced PTP daemon ("sfptpd") and linuxptpd which is
provided in some distributions.
Issue 37568:
~ Properly deliver VLAN-tagged PTP packets when disabling PTP.
Issue 39894:
~ Fix DMA unmapping of incorrect addresses for TSO TX buffers on SFN7XXX
family adapters.
This bug would be observed as unmap page errors, and would affect users with
TSO (enabled by default) and an IOMMU enabled.
Issue 38352:
~ Remove build time warning message when MTD is disabled, as sfutils can now
work on linux using an IOCTL to the driver.
### v4.0.0.6585 -- Feature release
Support for SFN7XXX family adapters (using SFC91XX family silicon):
~ This release contains full GA quality support for the new SFN7XXX series of
network adapters.
~ Currently running PTP on SFN7XXX adapters is not supported. This support
will be in a subsequent release in 2013Q4.
~ There are new counters exposed via "ethtool -S" to expose any new internal
packet counters.
~ driver support for the "sfkey" utility to modify feature licenses on the
adapter.
TX improvements:
~ Support for SFC91XX TX PIO (Programmed IO) feature for lower TX latency.
This is controlled by the new module parameter "piobuf_size" (default on
x86 is 256 bytes). For frames that are smaller than this, and if there are
adapter resources available, a packet will be transfered directly to the
adapter via PIO rather than incur the latency of a bus mastered DMA.
RX improvements:
~ The driver now uses a single optimized RX buffer allocation strategy
(the "rx_alloc_method" module parameter has been deprecated and has no
effect other than to print a warning).
~ Use memory more efficiently by supporting RX scatter for large MTU values
~ Make initial fill of RX descriptors synchronous. This is to avoid a non-zero
"rx_nodesc_drops" count which could previously increment during driver load
when there was incoming traffic.
Support for POWER systems, including:
~ AER/EEH support in the net driver
~ Improve performance by reusing DMA-mapped pages
~ Improve performance by allocating RX buffers more efficiently in pages of
memory
Ethtool offline self-test behaviour for SFN7XXX:
~ For SFN7XXX series adapters the ethtool offline selftest (which can be used
to verify hardware operation) can cause operations on other network
interfaces on the same adapter to fail (as the whole adapter goes into a
test mode). Only run the ethtool offline self-test on one port at a time,
and expect to see loss of link for the duration of the test on all ports.
Note the ethtool online test does not have this limitation.
Issue 39031:
~ Remove ethtool RESET operation that could be used by an unpriviledged local
user to cause a local denial of service.
Issue 31933:
~ Cancel interrupt self-test on interface-down on Linux <2.6.23
Issue 36071:
~ Avoid kernel warning in skb_try_coalesce
Issue 34973:
~ Fix RX buffer handling on non-x86 and non-POWER systems
Issue 35013:
~ Fix potential kernel panic when using certain (uncommon) MTU values
Issue 35019:
~ Fix build failure on RHEL5 kernel
Issue 34716:
~ Fix rare memory leak on RX data path
Issue 33921 / 33922:
~ Fix RX filter insertion conflicts
Issue 34253:
~ Disable AOE on RHEL4 to fix build failure
Issue 34299:
~ Fix potential flood of syslog if PTP packet storm occurs
Issue 16820:
~ Detach network device during reconfiguration to avoid TX watchdog event
Issue 34335:
~ Fix driver load failure due to symbols exported on some kernel versions
### v3.3.3.6329 -- Update release
Issue 38482:
~ Fix issue in dealing with multicast mismatch present in v3.3.0.6262, which
was caused by the fix for Issue 31533. This could cause old packet data to
be received (and hence could look like packet loss, or out-of-order
packets).
The bug hits when the following events coincide:
1) The arrival of a frame that is discarded by the driver.
2) The receiving channel is in "page-mode" for RX buffer allocation.
3) The previous packet received has been consumed and freed.
By default the RX allocation mode is selected automatically by the
driver according to the traffic profile, and will prefer page-mode when
packets that can be handled by kernel GRO dominate.
A workaround for affected drivers is to set the driver parameter
"rx_alloc_method=1" (to force SKB based allocations).
Issue 37963:
~ Allow PTP to work with vlans post 2.6.37
Issue 37405:
~ Add kernel compat for RHEL 6.5 backport of ARFS
### v3.3.0.6309 -- Update release
Issue 34948:
~ Fix CPU soft-lockup on interrupted self-test
Issue 34511:
~ Fix kernel panic when VLAN group rapidly created/destroyed
Issue 30759:
~ Changes to max buffer table and VI advertised via driverlink
~ Respect num_vis setting even if it exceeds the heuristic limit
Issue 35637:
~ Fix kernel panic on RX completion with unexpected index
Issue 35644:
~ Use hardware checksum offload under circumstances when we previously didn't
(specifically, packets not aggregated by LRO and not passed into GRO)
Issue 35774:
~ Remove sfc_tune from RPM builds and disable CONFIG_SFC_TUNE
Issue 36530:
~ Kernel compat fix for getnstime_raw_and_real() on 2.6.26.8
Issue 37257:
~ Build fixes for Linux 3.10: VLAN API, I2C API
Issue 37256:
~ Remove write permission from phy_type attribute (Linux 3.10 compatibility)
Issue 37280:
~ Update netdev notifier function for API change in Linux 3.11
Issue 37110:
~ Always store port number in private data, not net_device::dev_id
Issue 35400:
~ PTP: Fix incorrect filter address for PTP Peer Delay Multicast
Issue
~ PTP: Fix crash if PTP hardware clock cannot be registered
Issue 37248:
~ PTP: mask out PCP and DEI fields in VLAN matching
### v3.3.0.6262 -- Update release
Issue 31533:
~ Fix sync of RX DMA buffer when it is not the last in the page (non issue on x86 servers)
Issue 31533:
~ Fix efx_rx_buf_offset() in the presence of swiotlb (used on 32bit systems with >3Gb RAM)
Issue 33851:
~ Fix very rare data corruption - use TX push only with a single descriptor
Issue
~ AOE: Expose FC partition for use by sfupdate
Issue 33711:
~ PTP: Fix for MC statistics.
Issue 33719:
~ PTP: Check that PTP is enabled in the kernel before compiling PHC support
Issue 34355:
~ PTP: Guard against using PPS ioctl API on non-PTP adapters
Issue 34356:
~ PTP: Improve accuracy of PPS timestamps
Issue 34482:
~ PTP: Fix to SO_TIMESTAMPING system timestamps (in conversion of hardware
timestamps)
### v3.3.0.6246 -- Update release
Support for Enhanced PTP daemon, including:
~ Support for VLAN tagged PTP packets
~ Configurable receive filtering for VLANs, PTP Domain number and UUID
~ Timestamping of multicast PTP packets on PTP Primary and Peer Delay
Multicast addresses
~ Timestamping of unicast PTP packets sent directly to host
~ Separate interfaces to apply a clock offset and adjust the clock frequency
~ IOCTL interface to facilitate synchronization to an external PPS signal
~ Support for recent kernels that include the PHC API
Early support for AOE SFA6902F boards
General improvements / fixes:
~ Various kernel compatibility fixes up to linux 3.7
Issue 21056:
~ Dropped packet stat ("rx_nodesc_drop_cnt" in ethtool -S) no longer counts drops
until interface is fully up
Issue 32292:
~ Fix potential kernel warning from efx_hard_start_xmit when changing MTUs
(lock TX queues before calling netif_device_detach())
### v3.3.0.6222B -- Feature release
General improvements / fixes:
~ Support for byte queue limits (requires Linux 3.3)
~ Do not fail probe when NVRAM MAC address is invalid
~ Fix races between net device operations, online reset, power
management and hotplug
~ Keep NICs quiescent after they have been disabled
~ Improve log messages in case we abort probe due to a pending reset
~ Correct the reported priorities of different filter types
~ Fix spurious array bounds error in efx_filter_redirect_id()
~ Fix PTP synchronisation on big-endian architectures
Issue 21781 / 24969:
~ Reduce TX latency by using copy buffers for short fragmented packets
This adds the "tx_copybreak" module parameter which sets the size of a TX
copy buffer. The size must be a power of 2 between 128 and 4096
(default 128)
Issue 24887:
~ Implement VLAN tag insertion for SFC9000 family
Issue 31308:
~ Enable VLAN SG and TSO offloads for SFC9000 family on RHEL 5.5+
Issue 20784:
~ Add hardware monitor for sensors managed by firmware
Issue 23165:
~ Implement the VF spoofchk (TX filtering) attribute (requires Linux 3.2)
Issue 30065:
~ Fix compilation issues with 3.4 kernels
Issue 31530:
~ Fix reporting of IPv4 full filters through ethtool/sfctool
Issues 31576 / 22910:
~ Really disable flow control while flushing
Issue 31671:
~ Work-around flush timeout when flushes have completed
### v3.2.1.6110 -- Update release
Issue 30436:
~ Remove duplicate calls to suspend and resume driverlink during self test reset
Issue 31308:
~ Fix reduced performance under some older RHEL versions with VLANs
Issue 31045:
~ Add RHEL4.8 support
Issue 31092:
~ Fix incorrect usage line in sfctool --help output
### v3.2.1.6099 -- Update release
Issue 30312:
~ Latency reduction: Use 128bit write for TX descriptor push
Issue 28547:
~ Enhancement: Expose SFP+ module vendor information via ethtool
Issue 30286 / CVE-2012-3412:
~ DoS protection - prevent extreme TSO parameters from stalling TX queues
Issue 30845:
~ Self-test: disable VFs and never set RX_DESCQ_EN for safety
Issue 26646 / 22607:
~ Fix possibility of some statistics counters being non-contiguous
Issue 30038:
~ Build fix for kernel 3.4-rc5
Issue 30762:
~ Fix kernel-compat test for PCI VPD in sysfs
### v3.2.1.6090 -- Update release
Issue 28324:
~ Fix recovery path from memory parity hardware errors
~ Add module option "efx_disable_port_on_mpe" to top recovery and disable
interface (to allow bonding to fail over on such errors)
Issue 29760:
~ Report serial number of adapter on memory parity hardware error
Issue 25050:
~ Limit number of retries on RX queue flush hardware failures
Issue:
~ Fix missing cleanup in failure path of efx_pci_probe()
Issue 29758:
~ Reporting of MC scheduler message downgraded
Issue 26972:
~ Fix start of day NAPI race < 2.6.24
Issue 23581:
~ Display warning of fail to create MTD partition
Issue 28008:
~ Timer quantum is incorrect for Falcon user-mode queues
Issue 20567:
~ Fix kernel panic with efx_mcdi_phy_remove on failure path to probe port
Issue 27481
~ Fix possible race when stopping TX queues
Issue 28139:
~ Self test can fail on machines that disable interrupts for > 10ms
Issue 28767:
~ Build fix for kernel 3.3
Issue 28406:
~ SR-IOV: Fix race condition involving rtnetlink and pci_enable_sriov
Issue 27202:
~ SR-IOV: Fix initialisation and teardown race
Issue 28110:
~ SR-IOV: Correctly set TX MAC filter search limits
Issue 27924:
~ SR-IOV: Pass timer quantum over VFDI for SFN6122F support
Issue 28404:
~ SR-IOV: RSS only works on VF if also enabled on PF
Issue 28528:
~ SR-IOV: Correct validation of allocation size in peer_page_count
Issue 27838:
~ Implement EFX_FILTER_FLAG_RX_OVERRIDE_IP for 'default' filters
Issue 27571:
~ RX n-tuple interface now deprecated, replaced by RX NFC
(users that are configuring RX n-tuple filters with sfctool must also
update sfutils to version 3.2.1.6079 or later)
Issue 27514: