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path: root/drivers/net/ethernet/sfc/ptp.c
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2017-12-18sfc: improve PTP error reportingEdward Cree1-1/+3
Log a message if PTP probing fails; if we then, unexpectedly, get PTP events, only log a message for the first one on each device. Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-15Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds1-2/+0
Pull networking updates from David Miller: "Highlights: 1) Maintain the TCP retransmit queue using an rbtree, with 1GB windows at 100Gb this really has become necessary. From Eric Dumazet. 2) Multi-program support for cgroup+bpf, from Alexei Starovoitov. 3) Perform broadcast flooding in hardware in mv88e6xxx, from Andrew Lunn. 4) Add meter action support to openvswitch, from Andy Zhou. 5) Add a data meta pointer for BPF accessible packets, from Daniel Borkmann. 6) Namespace-ify almost all TCP sysctl knobs, from Eric Dumazet. 7) Turn on Broadcom Tags in b53 driver, from Florian Fainelli. 8) More work to move the RTNL mutex down, from Florian Westphal. 9) Add 'bpftool' utility, to help with bpf program introspection. From Jakub Kicinski. 10) Add new 'cpumap' type for XDP_REDIRECT action, from Jesper Dangaard Brouer. 11) Support 'blocks' of transformations in the packet scheduler which can span multiple network devices, from Jiri Pirko. 12) TC flower offload support in cxgb4, from Kumar Sanghvi. 13) Priority based stream scheduler for SCTP, from Marcelo Ricardo Leitner. 14) Thunderbolt networking driver, from Amir Levy and Mika Westerberg. 15) Add RED qdisc offloadability, and use it in mlxsw driver. From Nogah Frankel. 16) eBPF based device controller for cgroup v2, from Roman Gushchin. 17) Add some fundamental tracepoints for TCP, from Song Liu. 18) Remove garbage collection from ipv6 route layer, this is a significant accomplishment. From Wei Wang. 19) Add multicast route offload support to mlxsw, from Yotam Gigi" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (2177 commits) tcp: highest_sack fix geneve: fix fill_info when link down bpf: fix lockdep splat net: cdc_ncm: GetNtbFormat endian fix openvswitch: meter: fix NULL pointer dereference in ovs_meter_cmd_reply_start netem: remove unnecessary 64 bit modulus netem: use 64 bit divide by rate tcp: Namespace-ify sysctl_tcp_default_congestion_control net: Protect iterations over net::fib_notifier_ops in fib_seq_sum() ipv6: set all.accept_dad to 0 by default uapi: fix linux/tls.h userspace compilation error usbnet: ipheth: prevent TX queue timeouts when device not ready vhost_net: conditionally enable tx polling uapi: fix linux/rxrpc.h userspace compilation errors net: stmmac: fix LPI transitioning for dwmac4 atm: horizon: Fix irq release error net-sysfs: trigger netlink notification on ifalias change via sysfs openvswitch: Using kfree_rcu() to simplify the code openvswitch: Make local function ovs_nsh_key_attr_size() static openvswitch: Fix return value check in ovs_meter_cmd_features() ...
2017-11-11net: sfc: remove redundant variable startColin Ian King1-2/+0
Variable start is assigned but never read hence it is redundant and can be removed. Cleans up clang warning: drivers/net/ethernet/sfc/ptp.c:655:2: warning: Value stored to 'start' is never read Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Bert Kenward <bkenward@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-25locking/atomics: COCCINELLE/treewide: Convert trivial ACCESS_ONCE() patterns ↵Mark Rutland1-5/+5
to READ_ONCE()/WRITE_ONCE() Please do not apply this to mainline directly, instead please re-run the coccinelle script shown below and apply its output. For several reasons, it is desirable to use {READ,WRITE}_ONCE() in preference to ACCESS_ONCE(), and new code is expected to use one of the former. So far, there's been no reason to change most existing uses of ACCESS_ONCE(), as these aren't harmful, and changing them results in churn. However, for some features, the read/write distinction is critical to correct operation. To distinguish these cases, separate read/write accessors must be used. This patch migrates (most) remaining ACCESS_ONCE() instances to {READ,WRITE}_ONCE(), using the following coccinelle script: ---- // Convert trivial ACCESS_ONCE() uses to equivalent READ_ONCE() and // WRITE_ONCE() // $ make coccicheck COCCI=/home/mark/once.cocci SPFLAGS="--include-headers" MODE=patch virtual patch @ depends on patch @ expression E1, E2; @@ - ACCESS_ONCE(E1) = E2 + WRITE_ONCE(E1, E2) @ depends on patch @ expression E; @@ - ACCESS_ONCE(E) + READ_ONCE(E) ---- Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: davem@davemloft.net Cc: linux-arch@vger.kernel.org Cc: mpe@ellerman.id.au Cc: shuah@kernel.org Cc: snitzer@redhat.com Cc: thor.thayer@linux.intel.com Cc: tj@kernel.org Cc: viro@zeniv.linux.org.uk Cc: will.deacon@arm.com Link: http://lkml.kernel.org/r/1508792849-3115-19-git-send-email-paulmck@linux.vnet.ibm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-12-03sfc: remove EFX_BUG_ON_PARANOID, use EFX_WARN_ON_[ONCE_]PARANOID insteadEdward Cree1-1/+1
Logically, EFX_BUG_ON_PARANOID can never be correct. For, BUG_ON should only be used if it is not possible to continue without potential harm; and since the non-DEBUG driver will continue regardless (as the BUG_ON is compiled out), clearly the BUG_ON cannot be needed in the DEBUG driver. So, replace every EFX_BUG_ON_PARANOID with either an EFX_WARN_ON_PARANOID or the newly defined EFX_WARN_ON_ONCE_PARANOID. Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-09-22ptp_clock: future-proofing drivers against PTP subsystem becoming optionalNicolas Pitre1-7/+7
Drivers must be ready to accept NULL from ptp_clock_register() if the PTP clock subsystem is configured out. This patch documents that and ensures that all drivers cope well with a NULL return. Signed-off-by: Nicolas Pitre <nico@linaro.org> Reviewed-by: Eugenia Emantayev <eugenia@mellanox.com> Acked-by: Richard Cochran <richardcochran@gmail.com> Acked-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-08-12sfc: set interrupt moderation via MCDIBert Kenward1-1/+1
SFN8000-series NICs require a new method of setting interrupt moderation, via MCDI. This is indicated by a workaround flag. This new MCDI command takes an explicit time value rather than a number of ticks. It therefore makes sense to also store the moderation values in terms of time, since that is what the ethtool interface is interested in. Signed-off-by: Bert Kenward <bkenward@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-01net: sfc: avoid using timespecArnd Bergmann1-7/+7
The sfc driver internally uses a time format based on 32-bit (unsigned) seconds and 32-bit nanoseconds. This means it will overflow in 2106, but the value we pass into it is a signed 32-bit tv_sec that already overflows in 2038 to a negative value. This patch changes the logic to use the lower 32 bits of the timespec64 tv_sec in efx_ptp_ns_to_s_ns, which will have the correct value beyond the overflow. While this does not change any of the register values, it lets us keep using the driver after we deprecate the use of the timespec type in the kernel. In the efx_ptp_process_times function, the change to use timespec64 is similar, in that the tv_sec portion is ignored anyway and we only care about the nanosecond portion that remains unchanged. Acked-by: Richard Cochran <richardcochran@gmail.com> Acked-by: David S. Miller <davem@davemloft.net> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: John Stultz <john.stultz@linaro.org>
2015-10-01ntp/pps: use y2038 safe types in pps_event_timeArnd Bergmann1-8/+8
The pps_event_time uses two 'timespec' structures internally, which suffer from the y2038 problem. The uses of this structure are fairly self-contained in the pps code, so this replaces them all at once. Unfortunately, this includes the sfc ethernet driver aside from the pps subsystem, so we change that one as well. Both touch the same data structure, and there probably is no good way to split the patch into smaller units. Acked-by: Richard Cochran <richardcochran@gmail.com> Acked-by: David S. Miller <davem@davemloft.net> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: John Stultz <john.stultz@linaro.org>
2015-05-21sfc: Initialise MCDI buffers to 0 on declaration.Jon Cooper1-3/+3
In order to avoid MC bugs the flags field needs to be set to 0. Instead of explicitly clearing out the flags individually, a better way to do this is to memset the MCDI_BUF to 0. Signed-off-by: Shradha Shah <sshah@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-13sfc: suppress some MCDI error messages in PTPEdward Cree1-11/+16
Also, remove a needless netif_err() from efx_ptp_update_stats() - if the MCDI fails it'll print its own error message, we don't need another that adds no information. Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-13sfc: nicer log message on PTP probe failEdward Cree1-1/+6
Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-31ptp: sfc: convert to the 64 bit get/set time methods.Richard Cochran1-11/+11
This patch changes the driver to use the newer API. Depending on how the hardware represents a time value, this driver may or may not yet be ready for the year 2038. Compile tested only. Signed-off-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-21ptp: drivers: set the number of programmable pins.Richard Cochran1-0/+1
This patch updates the many PTP Hardware Clock drivers with the newly introduced field that advertises the number of programmable pins. Some of these devices do have programmable pins, but the implementation will have to wait for follow on patches. Signed-off-by: Richard Cochran <richardcochran@gmail.com> Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-05Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-0/+7
Conflicts: drivers/net/wireless/ath/ath9k/recv.c drivers/net/wireless/mwifiex/pcie.c net/ipv6/sit.c The SIT driver conflict consists of a bug fix being done by hand in 'net' (missing u64_stats_init()) whilst in 'net-next' a helper was created (netdev_alloc_pcpu_stats()) which takes care of this. The two wireless conflicts were overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
2014-02-26sfc: check for NULL efx->ptp_data in efx_ptp_eventEdward Cree1-0/+7
If we receive a PTP event from the NIC when we haven't set up PTP state in the driver, we attempt to read through a NULL pointer efx->ptp_data, triggering a panic. Signed-off-by: Edward Cree <ecree@solarflare.com> Acked-by: Shradha Shah <sshah@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-02-12sfc: Rewrite adjustment of PPS event in a clearer wayBen Hutchings1-24/+23
There is substantial latency in generation and handling of PPS events from the NIC, which we have to correct for before passing a host timestamp to the PPS subsystem. We compare clocks with the MC, giving us two offsets to subtract from the timestamp generated by pps_get_ts(): (a) Time from the last good sync (where we got host and NIC timestamps for nearly the same instant) to the time we called pps_get_ts() (b) Time from NIC top of second to the last good sync We currently calculate (a) + (b) in a quite confusing way. Instead, calculate (a) completely, then add (b) to it. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Shradha Shah <sshah@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-02-12sfc: Cache skb->data in local variable in efx_ptp_rx()Ben Hutchings1-10/+13
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Shradha Shah <sshah@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-02-12sfc: Removed adhoc scheme to rate limit PTP event queue overflow messageLaurence Evans1-20/+2
Use conventional net_ratelimit() instead. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Shradha Shah <sshah@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-01-21sfc: Fix transposed ptp_{under, over}size_sync_windows statisticsBen Hutchings1-2/+2
Somehow I transposed these two while bringing the original statistics support upstream. Fixes: 99691c4ac112 ('sfc: Add PTP counters to ethtool stats') Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Shradha Shah <sshah@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-12sfc: Add PTP counters to ethtool statsBen Hutchings1-8/+118
These were implemented by Andrew Jackson and Laurence Evans but not previously included in-tree. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12sfc: Remove unnecessary condition for processing the TX timestamp queueBen Hutchings1-12/+4
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12sfc: Don't clear timestamps in efx_ptp_rx()Ben Hutchings1-6/+0
A freshly allocated skb starts with timestamps clear. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12sfc: Enable PTP clock and timestamping for all functions on EF10Ben Hutchings1-16/+26
The SFC9100 family has only one clock per controller, shared by all functions. Therefore only create a clock device under the primary function, and make all other functions refer to the primary's clock device. Since PTP functionality is limited to port 0 and PF 0 on the earlier SFN[56]322F boards, and we also set the primary flag for that function, we can make the creation of a clock device conditional only on this flag. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12sfc: Add RX packet timestamping for EF10Jon Cooper1-13/+118
The EF10 firmware can optionally insert RX timestamps in the packet prefix. These only include the clock minor value. We must also enable periodic time sync events on each event queue which provide the high bits of the clock value. [bwh: Combined and rebased several changes. Added the above description and some sanity checks for inline vs separate timestamps. Changed efx_rx_skb_attach_timestamp() to read the packet prefix from the skb head area.] Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12sfc: split setup of hardware timestamping into NIC-type operationDaniel Pieczko1-59/+10
I added efx_ptp_get_mode() to avoid moving the definition for efx_ptp_data, since the current PTP mode is needed for siena.c:siena_set_ptp_hwtstamp. [bwh: Also move the rx_filters mask, and add kernel-doc] Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12sfc: Add support for SFC9100 timestamp formatLaurence Evans1-25/+231
The clock minor tick on the SFC9100 family is 2^-27 s, not 1 ns. There are also various pipeline delays which we need to correct for when interpreting timestamps. We query the firmware for the clock format and corrections at run-time. [bwh: Combined and rebased several changes] Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12sfc: Tidy up PTP synchronization codeLaurence Evans1-20/+24
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12sfc: PTP - tidy up unused/useless variablesLaurence Evans1-15/+1
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12sfc: Remove kernel-doc for efx_ptp_data fields not present in this versionBen Hutchings1-15/+0
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12sfc: Initialise efx_ptp_data::phc_clock_info from a static templateBen Hutchings1-14/+16
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12sfc: Do not use MAC address as clock nameBen Hutchings1-3/+2
We'll be sharing clocks between multiple functions with their own MAC addresses. The name field is now documented as 'A short "friendly name" to identify the clock ...' and '... not meant to be a unique id.' So use the name 'sfc'. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12sfc: Remove dependency of PTP on having a dedicated channelBen Hutchings1-22/+37
We need a dedicated channel on Siena to ensure we can match up the separate RX and timestamp events for each PTP packet. We won't do this for EF10 as timestamps are delivered inline. Pass a channel index of 0 to MC_CMD_PTP_OP_ENABLE when there is no dedicated channel. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12sfc: Split PTP multicast filter insertion/removal out of efx_ptp_{start,stop}()Ben Hutchings1-17/+39
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-12sfc: Log all unexpected MCDI errorsEdward Cree1-4/+20
Split each of efx_mcdi_rpc, efx_mcdi_rpc_finish, and efx_mcdi_rpc_async into a normal and a _quiet version; made the former log MCDI errors with netif_err (and include the raw MCDI error code), and the latter never log them at all. Changed various callers; any where some errors are expected (but others are not) call the _quiet version and then if necessary log the MCDI error themselves. Said logging is done by new efx_mcdi_display_error. Callers of efx_mcdi_rpc*_quiet functions which may want to log the error need to ensure that their outbuf is big enough to hold an MCDI error; to this end, they now use MCDI_DECLARE_BUF_OUT_OR_ERR, which always allocates at least 8 bytes. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-06Merge branch 'sfc-3.13' into masterBen Hutchings1-9/+57
Merge sfc fixes destined for 3.13, as development for 3.14+ depends on some of them.
2013-12-06sfc: Maintain current frequency adjustment when applying a time offsetBen Hutchings1-2/+2
There is a single MCDI PTP operation for setting the frequency adjustment and applying a time offset to the hardware clock. When applying a time offset we should not change the frequency adjustment. These two operations can now be requested separately but this requires a flash firmware update. Keep using the single operation, but remember and repeat the previous frequency adjustment. Fixes: 7c236c43b838 ('sfc: Add support for IEEE-1588 PTP') Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-06sfc: Stop/re-start PTP when stopping/starting the datapath.Alexandre Rames1-3/+27
This disables PTP when we bring the interface down to avoid getting unmatched RX timestamp events, and tries to re-enable it when bringing the interface up. [bwh: Make efx_ptp_stop() safe on Falcon. Introduce efx_ptp_{start,stop}_datapath() functions; we'll expand them later.] Fixes: 7c236c43b838 ('sfc: Add support for IEEE-1588 PTP') Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-06sfc: Rate-limit log message for PTP packets without a matching timestamp eventBen Hutchings1-2/+3
In case of a flood of PTP packets, the timestamp peripheral and MC firmware on the SFN[56]322F boards may not be able to provide timestamp events for all packets. Don't complain too much about this. Fixes: 7c236c43b838 ('sfc: Add support for IEEE-1588 PTP') Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-06sfc: PTP: Moderate log message on event queue overflowLaurence Evans1-2/+21
Limit syslog flood if a PTP packet storm occurs. Fixes: 7c236c43b838 ('sfc: Add support for IEEE-1588 PTP') Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-12-06sfc: Add length checks to efx_xmit_with_hwtstamp() and efx_ptp_is_ptp_tx()Ben Hutchings1-0/+4
efx_ptp_is_ptp_tx() must be robust against skbs from raw sockets that have invalid IPv4 and UDP headers. Add checks that: - the transport header has been found - there is enough space between network and transport header offset for an IPv4 header - there is enough space after the transport header offset for a UDP header Fixes: 7c236c43b838 ('sfc: Add support for IEEE-1588 PTP') Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-11-19sfc: Implement the SIOCGHWTSTAMP ioctlBen Hutchings1-1/+10
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-08-29sfc: Update copyright bannersBen Hutchings1-2/+2
Update the dates for files that have been added to in 2012-2013. Drop the 'Solarstorm' brand name that's still lingering here. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-08-27sfc: Add a function pointer to abstract write of host time into NIC shared ↵Laurence Evans1-2/+1
memory Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-08-27sfc: PTP MCDI requests need to initialise periph ID fieldLaurence Evans1-0/+7
This field is ignored by Siena firmware but is significant to EF10 firmware. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-08-21sfc: Add support for MCDI v2Ben Hutchings1-2/+3
MCDI v2 adds a second header dword with wider command and length fields. It also defines extra error codes. Change the fallback error number for unknown MCDI error codes from EIO to EPROTO. EIO is treated as indicating the MCDI transport has failed and we need to reset the function, which is rather drastic. v2 error codes and lengths don't fit into completion events, so for a v2-capable transport, always read the response header rather then using the event fields. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-08-21sfc: Rename Falcon-architecture register definitionsBen Hutchings1-1/+1
The EF10 architecture has a very different register layout from previous controllers, so we'll use separate files for the two sets of register definitions. Use 'farch' as an abbreviation for Falcon-architecture. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-08-21sfc: Add GFP flags to efx_nic_alloc_buffer() and make most callers allow ↵Ben Hutchings1-1/+1
blocking Most call sites for efx_nic_alloc_buffer() are part of the probe or reconfiguration paths and can allocate with GFP_KERNEL. A few others should use GFP_NOIO (I think). Only one is in atomic context and must use the current GFP_ATOMIC. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-08-21sfc: Add and use MCDI_SET_QWORD() and MCDI_SET_ARRAY_QWORD()Ben Hutchings1-9/+4
No need to keep open-coding the assignment of high and low dwords. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2013-08-21sfc: Ensure MCDI buffers, but not lengths, are dword alignedBen Hutchings1-5/+5
We currently require that MCDI request and response lengths are multiples of 4 bytes, because we will copy dwords in and out of shared memory and we want to be sure we won't read or write out of bounds. But all we really need to know is that there is sufficient padding for that. Also, we should ensure that buffers are dword-aligned, as on some architectures misaligned access will result in data corruption or a crash. Change the buffer type to array-of-efx_dword_t and remove the requirement that the lengths are multiples of 4. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
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