The dynamic algorithm, while now working, doesn't have good
performance in 40G mode.

One part of this patch addresses the high CPU utilization of some small
streaming workloads that the driver should reduce CPU in.

It also changes the minimum ITR that the dynamic algorithm
will settle on, causing our minimum latency to go from 12us
to about 14us, when using adaptive mode.

It also changes the BULK interrupt rate to allow maximum throughput
on a 40Gb connection with a single thread of transmit, clamping
interrupt rate to 8000 for TX makes single thread traffic go too
slow.

The new ULTRA bulk setting is introduced and is used
when the Rx packet rate on this queue exceeds 40000 packets per
second.  This value of 40000 was chosen because the automatic tuning
of minimum ITR=20us means that a single queue can't quite achieve
that many packets per second from a round-robin test.

Change-ID: Icce8faa128688ca5fd2c4229bdd9726877a92ea2
Signed-off-by: NJesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

The driver was using a value expressed in 2us increments
for the divisor to figure out our bytes/usec values.

Fix the usecs variable to contain a value in microseconds.

Change-ID: I5c20493103c295d6f201947bb908add7040b7c41
Signed-off-by: NJesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This change moves a multi-line register setting into a function
which simplifies reading the flow of the enable function.

This also fixes a bug where the enable function was enabling
the interrupt twice while trying to update the two interrupt
throttle rate thresholds for Rx and Tx.

Change-ID: Ie308f9d0d48540204590cb9d7a5a7b1196f959bb
Signed-off-by: NJesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

When the VF driver is unable to communicate with the PF, it just gives
up and never tries again. Aside from the obvious character flaw that
this shows, it's also a lousy user experience.

When PF communications fail, wait five seconds, and try again. And
again. Don't give up, little VF driver! Your prince will come!

Change-ID: Ia1378a39879883563b8faffce819f375821f9585
Signed-off-by: NMitch Williams <mitch.a.williams@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

The i40e_intr and i40e/i40evf_msix_clean_rings functions run from hard
interrupt context or with interrupts already disabled in netpoll.

They can use napi_schedule_irqoff() instead of napi_schedule()
Signed-off-by: NAlexander Duyck <aduyck@mirantis.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Acquire NVM, before issuing an AQ read nvm command for X722.
We need to acquire the NVM before issuing an AQ read to the NVM
otherwise we will get EBUSY from the FW. Also release when done.

This fixes the two X722 issues with respect to eeprom checksum verify
and reading NVM version info.

With this patch in place, i40e driver will provide basic support
for X722 devices.
Signed-off-by: NAnjali Singhai Jain <anjali.singhai@intel.com>
Acked-by: NJesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

The defines from the RSS enabling call were mistakenly
missed in the patches to the i40e which should have been
to i40evf as well.

This is a follow up to (commit ed921559886dd40528) "fix
32 bit build warnings".
Signed-off-by: NJesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch introduces a spinlock which is to be used for synchronizing
access to VSI's MAC filter list.

This patch also synchronizes execution of other codepaths which are
accessing VSI's MAC filter list with execution of
service_task:sync_vsi_filters.

In function i40e_add_vsi, copied out LAA MAC address instead of cloning
MAC filter entry because only MAC address is needed to remove MAC VLAN
filter from FW/HW.

Change-ID: I0e10ac7c715d44aa994239642aa4d57c998573a2
Signed-off-by: NKiran Patil <kiran.patil@intel.com>
Signed-off-by: NJesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Pablo Neira Ayuso says:

====================
Netfilter/IPVS updates for net-next

The following patchset contains Netfilter/IPVS updates for your net-next
tree. Most relevantly, updates for the nfnetlink_log to integrate with
conntrack, fixes for cttimeout and improvements for nf_queue core, they are:

1) Remove useless ifdef around static inline function in IPVS, from
   Eric W. Biederman.

2) Simplify the conntrack support for nfnetlink_queue: Merge
   nfnetlink_queue_ct.c file into nfnetlink_queue_core.c, then rename it back
   to nfnetlink_queue.c

3) Use y2038 safe timestamp from nfnetlink_queue.

4) Get rid of dead function definition in nf_conntrack, from Flavio
   Leitner.

5) Attach conntrack support for nfnetlink_log.c, from Ken-ichirou MATSUZAWA.
   This adds a new NETFILTER_NETLINK_GLUE_CT Kconfig switch that
   controls enabling both nfqueue and nflog integration with conntrack.
   The userspace application can request this via NFULNL_CFG_F_CONNTRACK
   configuration flag.

6) Remove unused netns variables in IPVS, from Eric W. Biederman and
   Simon Horman.

7) Don't put back the refcount on the cttimeout object from xt_CT on success.

8) Fix crash on cttimeout policy object removal. We have to flush out
   the cttimeout extension area of the conntrack not to refer to an unexisting
   object that was just removed.

9) Make sure rcu_callback completion before removing nfnetlink_cttimeout
   module removal.

10) Fix compilation warning in br_netfilter when no nf_defrag_ipv4 and
    nf_defrag_ipv6 are enabled. Patch from Arnd Bergmann.

11) Autoload ctnetlink dependencies when NFULNL_CFG_F_CONNTRACK is
    requested. Again from Ken-ichirou MATSUZAWA.

12) Don't use pointer to previous hook when reinjecting traffic via
    nf_queue with NF_REPEAT verdict since it may be already gone. This
    also avoids a deadloop if the userspace application keeps returning
    NF_REPEAT.

13) A bunch of cleanups for netfilter IPv4 and IPv6 code from Ian Morris.

14) Consolidate logger instance existence check in nfulnl_recv_config().

15) Fix broken atomicity when applying configuration updates to logger
    instances in nfnetlink_log.

16) Get rid of the .owner attribute in our hook object. We don't need
    this anymore since we're dropping pending packets that have escaped
    from the kernel when unremoving the hook. Patch from Florian Westphal.

17) Remove unnecessary rcu_read_lock() from nf_reinject code, we always
    assume RCU read side lock from .call_rcu in nfnetlink. Also from Florian.

18) Use static inline function instead of macros to define NF_HOOK() and
    NF_HOOK_COND() when no netfilter support in on, from Arnd Bergmann.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Sowmini found hang with rds-ping while testing RDS over TCP. Its
a corner case and doesn't happen always. The issue is not reproducible
with IB transport. Its clear from below dump why we see it with RDS TCP.

 [<ffffffff8153b7e5>] do_tcp_setsockopt+0xb5/0x740
 [<ffffffff8153bec4>] tcp_setsockopt+0x24/0x30
 [<ffffffff814d57d4>] sock_common_setsockopt+0x14/0x20
 [<ffffffffa096071d>] rds_tcp_xmit_prepare+0x5d/0x70 [rds_tcp]
 [<ffffffffa093b5f7>] rds_send_xmit+0xd7/0x740 [rds]
 [<ffffffffa093bda2>] rds_send_pong+0x142/0x180 [rds]
 [<ffffffffa0939d34>] rds_recv_incoming+0x274/0x330 [rds]
 [<ffffffff810815ae>] ? ttwu_queue+0x11e/0x130
 [<ffffffff814dcacd>] ? skb_copy_bits+0x6d/0x2c0
 [<ffffffffa0960350>] rds_tcp_data_recv+0x2f0/0x3d0 [rds_tcp]
 [<ffffffff8153d836>] tcp_read_sock+0x96/0x1c0
 [<ffffffffa0960060>] ? rds_tcp_recv_init+0x40/0x40 [rds_tcp]
 [<ffffffff814d6a90>] ? sock_def_write_space+0xa0/0xa0
 [<ffffffffa09604d1>] rds_tcp_data_ready+0xa1/0xf0 [rds_tcp]
 [<ffffffff81545249>] tcp_data_queue+0x379/0x5b0
 [<ffffffffa0960cdb>] ? rds_tcp_write_space+0xbb/0x110 [rds_tcp]
 [<ffffffff81547fd2>] tcp_rcv_established+0x2e2/0x6e0
 [<ffffffff81552602>] tcp_v4_do_rcv+0x122/0x220
 [<ffffffff81553627>] tcp_v4_rcv+0x867/0x880
 [<ffffffff8152e0b3>] ip_local_deliver_finish+0xa3/0x220

This happens because rds_send_xmit() chain wants to take
sock_lock which is already taken by tcp_v4_rcv() on its
way to rds_tcp_data_ready(). Commit db6526dc ("RDS: use
rds_send_xmit() state instead of RDS_LL_SEND_FULL") which
was trying to opportunistically finish the send request
in same thread context.

But because of above recursive lock hang with RDS TCP,
the send work from rds_send_pong() needs to deferred to
worker to avoid lock up. Given RDS ping is more of connectivity
test than performance critical path, its should be ok even
for transport like IB.
Reported-by: NSowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: NSowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: NSantosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: NSantosh Shilimkar <santosh.shilimkar@oracle.com>
Acked-by: NSowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add missing rule to export mpls iptunnel header needed by iproute2
Signed-off-by: NStephen Hemminger <stephen@networkplumber.org>
Acked-by: NRoopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

At the time of commit fff32699 ("tcp: reflect SYN queue_mapping into
SYNACK packets") we had little ways to cope with SYN floods.

We no longer need to reflect incoming skb queue mappings, and instead
can pick a TX queue based on cpu cooking the SYNACK, with normal XPS
affinities.

Note that all SYNACK retransmits were picking TX queue 0, this no longer
is a win given that SYNACK rtx are now distributed on all cpus.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

BITS_RX_EN is an 'unsigned long' constant, so the ones complement of that
has bits set that do not fit into a 32-bit variable on 64-bit architectures,
which causes a harmless gcc warning:

drivers/net/ethernet/hisilicon/hix5hd2_gmac.c: In function 'hix5hd2_port_disable':
drivers/net/ethernet/hisilicon/hix5hd2_gmac.c:374:2: warning: large integer implicitly truncated to unsigned type [-Woverflow]
  writel_relaxed(~(BITS_RX_EN | BITS_TX_EN), priv->base + PORT_EN);

This adds a cast to (u32) to tell gcc that the code is indeed fine.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The HNS MDIO driver fails to build on older ARM machines that are not
yet converted to CONFIG_OF:

drivers/net/ethernet/hisilicon/hns_mdio.c: In function 'hns_mdio_bus_name':
drivers/net/ethernet/hisilicon/hns_mdio.c:405:14: error: 'OF_BAD_ADDR' undeclared (first use in this function)
  u64 taddr = OF_BAD_ADDR;
              ^
drivers/net/ethernet/hisilicon/hns_mdio.c:405:14: note: each undeclared identifier is reported only once for each function it appears in
drivers/net/ethernet/hisilicon/hns_mdio.c:409:11: error: implicit declaration of function 'of_translate_address' [-Werror=implicit-function-declaration]
   taddr = of_translate_address(np, addr);
           ^

This clarifies the dependency to ensure we don't attempt to build these
drivers without CONFIG_OF, but also adds a COMPILE_TEST alternative to
give us better build coverage testing.

Build-tested on x86 as well to ensure this actually works.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Some configurations fail to build the hns dsaf code because of
a missing header file:

ethernet/hisilicon/hns/hns_dsaf_main.c: In function 'hns_dsaf_init':
ethernet/hisilicon/hns/hns_dsaf_main.c:1096:2: error: implicit declaration of function 'vzalloc' [-Werror=implicit-function-declaration]
  priv->soft_mac_tbl = vzalloc(sizeof(*priv->soft_mac_tbl)

This adds the correct #include.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

yankejian says:

====================
net: hns: fixes two bugs in hns driver

  This patchset fixes two bugs in hns driver.
  - fixes timeout when received pause frame from the connective ports
  - should be set by using ethtool -s when the devices are link down
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

this patch fixes the bug triggered timeout sequence. when the connective
ports cannot accept the packets with higher speed, they will send out the
pause frame to the Soc's mac. At that time, the driver resets the relevant
of the Soc, then it causes the packets cannot be sent out immediately.
this patch fixes the issue.
Signed-off-by: Nyankejian <yankejian@huawei.com>
Signed-off-by: NYisen Zhuang <yisen.zhuang@huawei.com>
Signed-off-by: Nlisheng <lisheng011@huawei.com>
Signed-off-by: Nlipeng <lipeng321@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

  before this patch, hns driver only permits user to set the net device
by using ethtool -s when the device is link up. it is obviously not so
good. it needs to be set no matter it is link up or down. so this patch
fixes this issue.
Signed-off-by: Nyankejian <yankejian@huawei.com>
Signed-off-by: NYisen Zhuang <yisen.zhuang@huawei.com>
Signed-off-by: Nlisheng <lisheng011@huawei.com>
Signed-off-by: Nlipeng <lipeng321@huawei.com>
Signed-off-by: NChenny Xu <chenny.xu@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

huangdaode says:

====================
net: hisilicon fix some bugs in HNS drivers

This patchset fixes the two bugs in HNS driver, one is remove the hnae sysfs interface
according to the review comments from Arnd Bergmann <arnd@arndb.de>, another
is fixing the wrong mac_id judgement bug which is found during internal tests.

change log:
v3:
 remove the hnae sysfs interface.

v2:
  1) remove first bug fix, which is fixed in another patch submitted by
     Arnd Bergmann <arnd@arndb.de>
  2) change the code sytyle according to Joe.

v1:
 initial version.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch fixes the wrong judgement of mac_id when get port num.
Signed-off-by: Nhuangdaode <huangdaode@hisilicon.com>
Signed-off-by: Nyankejian <yankejian@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch removes the hns driver hnae sysfs interface according to
Arnd's review comments.
Signed-off-by: Nhuangdaode <huangdaode@hisilicon.com>
Reviewed-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The 'bcm-phy-lib.c', added as a part of the commit
"net: phy: Add Broadcom phy library for common interfaces"
was missing the module license. This was causing an issue
when the library is built as a module; "module license
'unspecified' taints kernel".

This patch fixes the issue by adding the module license,
author and description to the bcm-phy-lib.c file.

Fixes: a1cba561 ("net: phy: Add Broadcom phy library for
common interfaces")
Signed-off-by: NArun Parameswaran <arunp@broadcom.com>
Acked-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

A dhcp server may provide parameters to a client from a pool of IP
addresses and using a shared rootfs, or provide a specific set of
parameters for a specific client, usually using the MAC address to
identify each client individually. The dhcp protocol also specifies
a client-id field which can be used to determine the correct
parameters to supply when no MAC address is available. There is
currently no way to tell the kernel to supply a specific client-id,
only the userspace dhcp clients support this feature, but this can
not be used when the network is needed before userspace is available
such as when the root filesystem is on NFS.

This patch is to be able to do something like "ip=dhcp,client_id_type,
client_id_value", as a kernel parameter to enable the kernel to
identify itself to the server.
Signed-off-by: NLi RongQing <roy.qing.li@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This merge resolves conflicts with 75aec9df ("bridge: Remove
br_nf_push_frag_xmit_sk") as part of Eric Biederman's effort to improve
netns support in the network stack that reached upstream via David's
net-next tree.
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>

Conflicts:
	net/bridge/br_netfilter_hooks.c

This patch cleanses whitespace around arithmetical operators.

No changes detected by objdiff.
Signed-off-by: NIan Morris <ipm@chirality.org.uk>
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>

Use tabs instead of spaces to indent code.

No changes detected by objdiff.
Signed-off-by: NIan Morris <ipm@chirality.org.uk>
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>

Use tabs instead of spaces to indent second line of parameters in
function definitions.

No changes detected by objdiff.
Signed-off-by: NIan Morris <ipm@chirality.org.uk>
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>

Correct whitespace layout of ternary operators in the netfilter-ipv4
code.

No changes detected by objdiff.
Signed-off-by: NIan Morris <ipm@chirality.org.uk>
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>

Whitespace cleansing: Labels should not be indented.

No changes detected by objdiff.
Signed-off-by: NIan Morris <ipm@chirality.org.uk>
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>

A recent change to the dst_output handling caused a new warning
when the call to NF_HOOK() is the only used of a local variable
passed as 'dev', and CONFIG_NETFILTER is disabled:

net/ipv6/ip6_output.c: In function 'ip6_output':
net/ipv6/ip6_output.c:135:21: warning: unused variable 'dev' [-Wunused-variable]

The reason for this is that the NF_HOOK macro in this case does
not reference the variable at all, and the call to dev_net(dev)
got removed from the ip6_output function. To avoid that warning now
and in the future, this changes the macro into an equivalent
inline function, which tells the compiler that the variable is
passed correctly but still unused.

The dn_forward function apparently had the same problem in
the past and added a local workaround that no longer works
with the inline function. In order to avoid a regression, we
have to also remove the #ifdef from decnet in the same patch.

Fixes: ede2059d ("dst: Pass net into dst->output")
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>

All verdict handlers make use of the nfnetlink .call_rcu callback
so rcu readlock is already held.
Signed-off-by: NFlorian Westphal <fw@strlen.de>
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>

We don't care if module is being unloaded anymore since hook unregister
handling will destroy queue entries using that hook.
Signed-off-by: NFlorian Westphal <fw@strlen.de>
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>

since commit 8405a8ff ("netfilter: nf_qeueue: Drop queue entries on
nf_unregister_hook") all pending queued entries are discarded.

So we can simply remove all of the owner handling -- when module is
removed it also needs to unregister all its hooks.
Signed-off-by: NFlorian Westphal <fw@strlen.de>
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>

Jiri Pirko says:

====================
mlxsw: Driver update, add initial support for Spectrum ASIC

Purpose of this patchset is to introduce initial support for Mellanox
Spectrum ASIC, including L2 bridge forwarding offload.

The only non-mlxsw patch in this patchset is the first one, introducing
pre-change upper notifier. That is used in last patch to ensure ports of
single ASIC are not bridged into multiple bridges, as that scenario is
currently not supported by driver.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add support for new generation Mellanox Spectrum ASIC, 10/25/40/50 and
100Gb/s Ethernet Switch.

The initial driver implements bridge forwarding offload including
bridge internal VLAN support, FDB static entries, FDB learning and
HW ageing including their setup.
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NElad Raz <eladr@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Since we currently do not support the offloading of 802.1D bridges, we
need to be able to let the device know it should not learn MAC addresses
on specific {Port, VID} pairs.

Add the SPVMLR register, which controls the learning enablement of
{Port, VID} pairs.
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add SFDAT which is used to control switch ageing time.
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In order for a port to support {Port, VID} to FID mapping it needs to be
configured to a virtual port mode (as opposed to VLAN mode).

Add the SVPE register, which enables port virtualization.
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

An incoming packet can be classified into a filtering identifer (FID)
based on its VID or incoming port and VID ({Port, VID}).

Add the SVFA register, which controls this mapping.
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Filtering identifiers (FIDs) are unique identifers of bridge instances
in the hardware.

Add the SFMR register, which is responsible for the creation and
configuration of these FIDs.
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>