Add support for extended error reporting.
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add support for extended error reporting.
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add support for extended error reporting.
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In case the MACB is directly connected to a
non-mdio PHY/device, it should be possible to provide
a fixed link configuration in the DT.
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
New features and bug fixes to quite a few different drivers, but
nothing really special standing out.
What makes me happy that we have now more vendors actively
contributing to upstream drivers. In this pull request we have patches
from Broadcom, Intel, Qualcomm, Realtek and Redpine Signals, and I
still have patches from Marvell and Quantenna pending in patchwork. Now
that's something comparing to how things looked 11 years ago in Jeff
Garzik's "State of the Union: Wireless" email:
https://lkml.org/lkml/2006/1/5/671
Major changes:
wil6210
* add low level RF sector interface via nl80211 vendor commands
* add module parameter ftm_mode to load separate firmware for factory
testing
* support devices with different PCIe bar size
* add support for PCIe D3hot in system suspend
* remove ioctl interface which should not be in a wireless driver
ath10k
* go back to using dma_alloc_coherent() for firmware scratch memory
* add per chain RSSI reporting
brcmfmac
* add support multi-scheduled scan
* add scheduled scan support for specified BSSIDs
* add support for brcm43430 revision 0
wlcore
* add wil1285 compatible
rsi
* add RS9113 USB support
iwlwifi
* FW API documentation improvements (for tools and htmldoc)
* continuing work for the new A000 family
* bump the maximum supported FW API to 31
* improve the differentiation between 8000, 9000 and A000 families
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Merge tag 'wireless-drivers-next-for-davem-2017-06-25' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next
Kalle Valo says:
====================
wireless-drivers-next patches for 4.13
New features and bug fixes to quite a few different drivers, but
nothing really special standing out.
What makes me happy that we have now more vendors actively
contributing to upstream drivers. In this pull request we have patches
from Broadcom, Intel, Qualcomm, Realtek and Redpine Signals, and I
still have patches from Marvell and Quantenna pending in patchwork. Now
that's something comparing to how things looked 11 years ago in Jeff
Garzik's "State of the Union: Wireless" email:
https://lkml.org/lkml/2006/1/5/671
Major changes:
wil6210
* add low level RF sector interface via nl80211 vendor commands
* add module parameter ftm_mode to load separate firmware for factory
testing
* support devices with different PCIe bar size
* add support for PCIe D3hot in system suspend
* remove ioctl interface which should not be in a wireless driver
ath10k
* go back to using dma_alloc_coherent() for firmware scratch memory
* add per chain RSSI reporting
brcmfmac
* add support multi-scheduled scan
* add scheduled scan support for specified BSSIDs
* add support for brcm43430 revision 0
wlcore
* add wil1285 compatible
rsi
* add RS9113 USB support
iwlwifi
* FW API documentation improvements (for tools and htmldoc)
* continuing work for the new A000 family
* bump the maximum supported FW API to 31
* improve the differentiation between 8000, 9000 and A000 families
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Marcelo Ricardo Leitner says:
====================
sctp: RFC 4960 Errata fixes
This patchset contains fixes for 4 Errata topics from
https://tools.ietf.org/html/draft-ietf-tsvwg-rfc4960-errata-01
Namely, sections:
3.12. Order of Adjustments of partial_bytes_acked and cwnd
3.22. Increase of partial_bytes_acked in Congestion Avoidance
3.26. CWND Increase in Congestion Avoidance Phase
3.27. Refresh of cwnd and ssthresh after Idle Period
Tests performed with netperf using net namespaces, with drop rates at
0%, 0.5% and 1% by netem, IPv4 and IPv6, 10 runs for each combination.
I couldn't spot differences on the stats. With and without these patches
the results vary in a similar way in terms of throughput and
retransmissions.
Tests with 20ms delay and 20ms delay + drops at 0.5% and 1% also had
results in a similar way, no noticeable difference.
Looking at cwnd, it was possible to notice slightly lower values being
used while still sustaining same throughput profile.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
RFC 4960 Errata 3.27 identifies that ssthresh should be adjusted to cwnd
because otherwise it could cause the transport to lock into congestion
avoidance phase specially if ssthresh was previously reduced by some
packet drop, leading to poor performance.
The Errata says to adjust ssthresh to cwnd only once, though the same
goal is achieved by updating it every time we update cwnd too. The
caveat is that we could take longer to get back up to speed but that
should be compensated by the fact that we don't adjust on RTO basis (as
RFC says) but based on Heartbeats, which are usually way longer.
See-also: https://tools.ietf.org/html/draft-ietf-tsvwg-rfc4960-errata-01#section-3.27
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
RFC4960 Errata 3.26 identified that at the same time RFC4960 states that
cwnd should never grow more than 1*MTU per RTT, Section 7.2.2 was
underspecified and as described could allow increasing cwnd more than
that.
This patch updates it so partial_bytes_acked is maxed to cwnd if
flight_size doesn't reach cwnd, protecting it from such case.
See-also: https://tools.ietf.org/html/draft-ietf-tsvwg-rfc4960-errata-01#section-3.26
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
As per RFC4960 Errata 3.22, this condition is not needed anymore as it
could cause the partial_bytes_acked to not consider the TSNs acked in
the Gap Ack Blocks although they were received by the peer successfully.
This patch thus drops the check for new Cumulative TSN Ack Point,
leaving just the flight_size < cwnd one.
See-also: https://tools.ietf.org/html/draft-ietf-tsvwg-rfc4960-errata-01#section-3.22
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
RFC4960 Errata 3.12 says RFC4960 is unclear about the order of
adjustments applied to partial_bytes_acked and cwnd in the congestion
avoidance phase, and that the actual order should be:
partial_bytes_acked is reset to (partial_bytes_acked - cwnd). Next, cwnd
is increased by MTU.
We were first increasing cwnd, and then subtracting the new value pba,
which leads to a different result as pba is smaller than what it should
and could cause cwnd to not grow as much.
See-also: https://tools.ietf.org/html/draft-ietf-tsvwg-rfc4960-errata-01#section-3.12
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Looks like commit f663dd9aaf ("net: core: explicitly select a txq before doing l2 forwarding")
has removed the need for this dedicated xmit function [it even explicitly
states so in its commit log message] but it hasn't removed the definition
of the ndo.
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
CC: Jason Wang <jasowang@redhat.com>
CC: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Timur Tabi says:
====================
net: qcom/emac: various minor improvements
A collection of minor fixes and features to the Qualcomm Technologies
EMAC network driver.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
On emulation systems, the EMAC's internal PHY ("SGMII") is not present,
but is not needed for network functionality. So just display a warning
message and ignore the SGMII.
Tested-by: Philip Elcan <pelcan@codeaurora.org>
Tested-by: Adam Wallis <awallis@codeaurora.org>
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
On ACPI systems, the driver depends on firmware pre-initializing the
EMAC because we don't have access to the clocks, and the EMAC has specific
clock programming requirements. Therefore, we don't want to reset the
EMAC while we are completing the initialization.
Tested-by: Richard Ruigrok <rruigrok@codeaurora.org>
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
The shutdown function halts all DMA and interrupts, so that all
operations are discontinued when the system shuts down, e.g. via
kexec or a forced reboot.
Tested-by: Tyler Baicar <tbaicar@codeaurora.org>
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Verify that the caller-provided sockaddr structure is large enough to
contain the sa_family field, before accessing it in bind() and connect()
handlers of the AF_IUCV socket. Since neither syscall enforces a minimum
size of the corresponding memory region, very short sockaddrs (zero or
one byte long) result in operating on uninitialized memory while
referencing .sa_family.
Fixes: 52a82e23b9 ("af_iucv: Validate socket address length in iucv_sock_bind()")
Signed-off-by: Mateusz Jurczyk <mjurczyk@google.com>
[jwi: removed unneeded null-check for addr]
Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Use proper endianness conversion for an skb protocol assignment. Given
that IUCV is only available on big endian systems (s390), this simply
avoids an endianness warning reported by sparse.
Signed-off-by: Hans Wippel <hwippel@linux.vnet.ibm.com>
Reviewed-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Reviewed-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
We're accidentally returning the wrong variable. "cmode" is
uninitialized at this point so it causes a static checker warning.
Fixes: 6335e9f244 ("net: dsa: mv88e6xxx: mv88e6390X SERDES support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Simon Horman says:
====================
nfp: add flower app with representors
this series adds a flower app to the NFP driver.
It initialises four types of netdevs:
* PF netdev - lower-device for communication of packets to device
* PF representor netdev
* VF representor netdevs
* Phys port representor netdevs
The PF netdev acts as a lower-device which sends and receives packets to
and from the firmware. The representors act as upper-devices. For TX
representors attach a metadata dst to the skb which is used by the PF
netdev to prepend metadata to the packet before forwarding the firmware. On
RX the PF netdev looks up the representor based on the prepended metadata
received from the firmware and forwards the skb to the representor after
removing the metadata.
Control queues are used to send and receive control messages which are
used to communicate configuration information with the firmware. These
are in separate vNIC to the queues belonging to the PF netdev. The control
queues are not exposed to use-space via a netdev or any other means.
The first 9 patches of this series provide app-independent infrastructure
to instantiate representors and the remaining 3 patches provide an app
which uses this infrastructure.
As the name implies this app is targeted at providing offload of TC flower.
Flower offload - allowing classifiers to be attached to representor netdevs
- is intended to be provided by follow-up patches at which point it will
become the dominant feature of the app.
Minor changes since v2 noted in changelogs of individual patches.
Review of v1 and v2 of this patchset have been addressed either
through discussion on-list or changes in this patchset.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Initialise VF and PF representors in flower app.
Based in part on work by Benjamin LaHaise, Bert van Leeuwen and
Jakub Kicinski.
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add app for flower offload. At this point the PF netdev and phys port
representor netdevs are initialised. Follow-up work will add support for
VF and PF representors and beyond that offloading the flower classifier.
Based in part on work by Benjamin LaHaise and Bert van Leeuwen.
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In preparation for adding a new flower app - targeted at offloading
the flower classifier - provide support for control message that it will
use to communicate with the NFP.
Based in part on work by Bert van Leeuwen.
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Allow tx/rx with metadata port id. This will be used for tx/rx of
representor netdevs acting as upper-devices while a pf netdev acts
as a lower-device.
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Provide port rather than vNIC as parameter of nfp_net_get_mac_addr.
This is to allow this function to be used by representor netdevs where
a vNIC may have more than one physical port none of which are associated
with the vNIC.
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add app-callbacks for app-specific initialisation of SRIOV.
Disabling SRIOV is brought forward in nfp_pci_remove()
so that nfp_app_sriov_disable is called while the app still exists.
This is intended to be used to implement representor netdevs for virtual
ports.
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Provide helpers for stats and xmit on representor netdevs.
Parts based on work by Bert van Leeuwen, Benjamin LaHaise and
Jakub Kicinski.
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Provide infrastructure to create and destroy representors of a given type.
Parts based on work by Bert van Leeuwen, Benjamin LaHaise,
and Jakub Kicinski.
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
If present map mac_stats and vf_cfg BARs. These will be used by
representor netdevs to read statistics for phys port and vf representors.
Also provide defines describing the layout of the mac_stats area.
Similar defines are already present for the cf_cfg area.
Based in part on work by Jakub Kicinski.
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Move MAC/PHY port init into a helper to make it easier to reuse
it in the representor code.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add app callback for reporting eswitch mode. Non-SRIOV apps
should not implement this callback, nfp_app code will then
respond with -EOPNOTSUPP.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Switches and modern SR-IOV enabled NICs may multiplex traffic from Port
representators and control messages over single set of hardware queues.
Control messages and muxed traffic may need ordered delivery.
Those requirements make it hard to comfortably use TC infrastructure today
unless we have a way of attaching metadata to skbs at the upper device.
Because single set of queues is used for many netdevs stopping TC/sched
queues of all of them reliably is impossible and lower device has to
retreat to returning NETDEV_TX_BUSY and usually has to take extra locks on
the fastpath.
This patch attempts to enable port/representative devs to attach metadata
to skbs which carry port id. This way representatives can be queueless and
all queuing can be performed at the lower netdev in the usual way.
Traffic arriving on the port/representative interfaces will be have
metadata attached and will subsequently be queued to the lower device for
transmission. The lower device should recognize the metadata and translate
it to HW specific format which is most likely either a special header
inserted before the network headers or descriptor/metadata fields.
Metadata is associated with the lower device by storing the netdev pointer
along with port id so that if TC decides to redirect or mirror the new
netdev will not try to interpret it.
This is mostly for SR-IOV devices since switches don't have lower netdevs
today.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Florian Fainelli says:
====================
net: phy: Support "internal" PHY interface
This makes the "internal" phy-mode property generally available and
documented and this allows us to remove some custom parsing code
we had for bcmgenet and bcm_sf2 which both used that specific value.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
The PHY library now supports an "internal" phy-mode, thus making our
custom parsing code now unnecessary.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The PHY library now supports an "internal" phy-mode, thus making our
custom parsing code now unnecessary.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Now that the Device Tree binding has been updated, update the PHY
library phy_interface_t and phy_modes to support the "internal" PHY
interface type.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
A number of Ethernet MACs have internal Ethernet PHYs and the internal
wiring makes it so that this knowledge needs to be available using the
standard 'phy-mode' property.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This series provides some updates to the mlx5 core and netdevice drivers.
Three patches from Tariq, Introduces page reuse mechanism in non-Striding
RQ RX datapath, we allow the the RX descriptor to reuse its allocated page
as much as it could, until the page is fully consumed. RX page reuse
reduces the stress on page allocator and improves RX performance especially
with high speeds (100Gb/s).
Next four patches of the series from Or allows to offload tc flower matching
on ttl/hoplimit and header re-write of hoplimit.
The rest of the series from Yotam and Or enhances mlx5 to support FW flashing
through the mlxfw module, in a similar manner done by the mlxsw driver.
Currently, only ethtool based flashing is implemented, where both Eth and IB ports
are supported.
Thanks,
Saeed.
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Merge tag 'mlx5-updates-2017-06-23' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux
Saeed Mahameed says:
====================
mlx5-updates-2017-06-23
This series provides some updates to the mlx5 core and netdevice drivers.
Three patches from Tariq, Introduces page reuse mechanism in non-Striding
RQ RX datapath, we allow the the RX descriptor to reuse its allocated page
as much as it could, until the page is fully consumed. RX page reuse
reduces the stress on page allocator and improves RX performance especially
with high speeds (100Gb/s).
Next four patches of the series from Or allows to offload tc flower matching
on ttl/hoplimit and header re-write of hoplimit.
The rest of the series from Yotam and Or enhances mlx5 to support FW flashing
through the mlxfw module, in a similar manner done by the mlxsw driver.
Currently, only ethtool based flashing is implemented, where both Eth and IB ports
are supported.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Buffer group mappings can be obtained using FW_PARAMs cmd for newer FW.
Since some of the bg_maps are obtained in atomic context, created another
t4_query_params_ns(), that wont sleep when awaiting mbox cmd completion.
Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Arjun Vynipadath <arjun@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
We were using t4_get_mps_bg_map() for both t4_get_port_stats()
to determine which MPS Buffer Groups to report statistics on for a given
Port, and also for t4_sge_alloc_rxq() to provide a TP Ingress Channel
Congestion Map. For T4/T5 these are actually the same values (because they
are ~somewhat~ related), but for T6 they should return different values
(T6 has Port 0 associated with MPS Buffer Group 0 (with MPS Buffer Group 1
silently cascading off) and Port 1 is associated with MPS Buffer Group 2
(with 3 cascading off)).
Based on the original work by Casey Leedom <leedom@chelsio.com>
Signed-off-by: Arjun Vynipadath <arjun@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The copy_to_user() function returns the number of bytes remaining but we
want to return -EFAULT here.
Fixes: 3c4d755915 ("tls: kernel TLS support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Dave Watson <davejwatson@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Steffen Klassert says:
====================
pull request (net-next): ipsec-next 2017-06-23
1) Use memdup_user to spmlify xfrm_user_policy.
From Geliang Tang.
2) Make xfrm_dev_register static to silence a sparse warning.
From Wei Yongjun.
3) Use crypto_memneq to check the ICV in the AH protocol.
From Sabrina Dubroca.
4) Remove some unused variables in esp6.
From Stephen Hemminger.
5) Extend XFRM MIGRATE to allow to change the UDP encapsulation port.
From Antony Antony.
6) Include the UDP encapsulation port to km_migrate announcements.
From Antony Antony.
Please pull or let me know if there are problems.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Netanel Belgazal says:
====================
net: update ena ethernet driver to version 1.2.0
This patchset contains some new features/improvements that were added
to the ENA driver to increase its robustness and are based on
experience of wide ENA deployment.
Change log:
V2:
* Remove patch that add inline to C-file static function (contradict coding style).
* Remove patch that moves MTU parameter validation in ena_change_mtu() instead of
using the network stack.
* Use upper_32_bits()/lower_32_bits() instead of casting.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
rx drop counter is reported by the device in the keep-alive
event.
update the driver's counter with the device counter.
Signed-off-by: Netanel Belgazal <netanel@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In ena_com_mem_addr_set(), use the above functions to split dma address
to the lower 32 bits and the higher 16 bits.
Signed-off-by: Netanel Belgazal <netanel@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Current driver tries to allocate msix vectors as the number of the
negotiated io queues. (with another msix vector for management).
If pci_alloc_irq_vectors() fails, the driver aborts the probe
and the ENA network device is never brought up.
With this patch, the driver's logic will reduce the number of IO
queues to the number of allocated msix vectors (minus one for management)
instead of failing probe().
Signed-off-by: Netanel Belgazal <netanel@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
ENA driver post Rx buffers through the Rx submission queue
for the ENA device to fill them with receive packets.
Each Rx buffer is marked with req_id in the Rx descriptor.
Newer ENA devices could consume the posted Rx buffer in out of order,
and as result the corresponding Rx completion queue will have Rx
completion descriptors with non contiguous req_id(s)
In this change the driver holds two rings.
The first ring (called free_rx_ids) is a mapping ring.
It holds all the unused request ids.
The values in this ring are from 0 to ring_size -1.
When the driver wants to allocate a new Rx buffer it uses the head of
free_rx_ids and uses it's value as the index for rx_buffer_info ring.
The req_id is also written to the Rx descriptor
Upon Rx completion,
The driver took the req_id from the completion descriptor and uses it
as index in rx_buffer_info.
The req_id is then return to the free_rx_ids ring.
This patch also adds statistics to inform when the driver receive out
of range or unused req_id.
Note:
free_rx_ids is only accessible from the napi handler, so no locking is
required
Signed-off-by: Netanel Belgazal <netanel@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
For each device reset, log to the device what is the cause
the reset occur.
Signed-off-by: Netanel Belgazal <netanel@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Matthias Schiffer
Michael Grzeschik
David S. Miller
Marcelo Ricardo Leitner
Mintz, Yuval
Timur Tabi
Mateusz Jurczyk
Hans Wippel
Dan Carpenter
Simon Horman
Jakub Kicinski
Florian Fainelli
Arjun Vynipadath
Netanel Belgazal