Pointers in DB are static, move them to read-only area so they
do not share a cacheline with fields modified in datapath.
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

A loaded XDP program might write to the xdp_frame data area,
prefetchw() it to avoid a potential cache miss.

Performance tests:
ConnectX-5, XDP_TX packet rate, single ring.
CPU: Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz

Before: 13,172,976 pps
After:  13,456,248 pps
2% gain.

Fixes: 22f45398 ("net/mlx5e: Support XDP over Striding RQ")
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Add implementation for the ndo_xdp_xmit callback.

Dedicate a new set of XDP-SQ instances to satisfy the XDP_REDIRECT
requests.  These instances are totally separated from the existing
XDP-SQ objects that satisfy local XDP_TX actions.

Performance tests:

xdp_redirect_map from ConnectX-5 to ConnectX-5.
CPU: Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz
Packet-rate of 64B packets.

Single queue: 7 Mpps.
Multi queue: 55 Mpps.
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

In the downstream patch that adds support to XDP_REDIRECT-out,
the XDP xmit frame function doesn't share the same run context as
the NAPI that polls the XDP-SQ completion queue.

Hence, need to re-order the XDP-SQ fields to avoid cacheline
false-sharing.

Take redirect_flush and doorbell out of DB, into separated
cachelines.

Add a cacheline breaker within the stats struct.
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Separate the XDP counters into two sets:
(1) One set reside in the RQ stats, and they monitor XDP stats
in the RQ side.
(2) Another set is per XDP-SQ, and they monitor XDP stats that
are related to XDP transmit flow.
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Convert the XDP xmit functions to use the generic xdp_frame API
in XDP_TX flow.
Same functions will be used later in this series to transmit
the XDP redirect-out packets as well.
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Add per-ring and total stats for received packets that
goes into XDP redirection.
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Take XDP code out of the general EN header and RX file into
new XDP files.

Currently, XDP-SQ resides only within an RQ and used from a
single flow (XDP_TX) triggered upon RX completions.
In a downstream patch, additional type of XDP-SQ instances will be
presented and used for the XDP_REDIRECT flow, totally unrelated to
the RX context.
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Add checks in control path upon an MTU change or an XDP program set,
to prevent reaching cases where large MTU and XDP are set simultaneously.

This is to make sure we allow XDP only with the linear RX memory scheme,
i.e. a received packet is not scattered to different pages.
Change mlx5e_rx_get_linear_frag_sz() accordingly, so that we make sure
the XDP configuration can really be set, instead of assuming that it is.
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Dedicate a function to all checks done when setting an XDP program.
Take indications from priv instead of netdev features.
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Keep all page-pool recycle calls within NAPI context.
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

No need to expose the MPWQE free function to control path.
The dealloc function already exposed, use it.
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Reviewed-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Jeff Kirsher says:

====================
10GbE Intel Wired LAN Driver Updates 2018-07-26

This series contains updates to ixgbe and igb.

Tony fixes ixgbe to add checks to ensure jumbo frames or LRO get enabled
after an XDP program is loaded.

Shannon Nelson adds the missing security configuration registers to the
ixgbe register dump, which will help in debugging.

Christian Grönke fixes an issue in igb that occurs on SGMII based SPF
mdoules, by reverting changes from 2 previous patches.  The issue was
that initialization would fail on the fore mentioned modules because the
driver would try to reset the PHY before obtaining the PHY address of
the SGMII attached PHY.

Venkatesh Srinivas replaces wmb() with dma_wmb() for doorbell writes,
which avoids SFENCEs before the doorbell writes.

Alex cleans up and refactors ixgbe Tx/Rx shutdown to reduce time needed
to stop the device.  The code refactor allows us to take the completion
time into account when disabling queues, so that on some platforms with
higher completion times, would not result in receive queues disabled
messages.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Once user manually deletes the chain using "chain del", the chain cannot
be marked as explicitly created anymore.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Fixes: 32a4f5ec ("net: sched: introduce chain object to uapi")
Signed-off-by: David S. Miller <davem@davemloft.net>

The zerocopy path ultimately calls iov_iter_get_pages, which defines the
step function for ITER_KVECs as simply, return -EFAULT. Taking the
non-zerocopy path for ITER_KVECs avoids the unnecessary fallback.

See https://lore.kernel.org/lkml/20150401023311.GL29656@ZenIV.linux.org.uk/T/#u
for a discussion of why zerocopy for vmalloc data is not a good idea.

Discovered while testing NBD traffic encrypted with ktls.

Fixes: c46234eb ("tls: RX path for ktls")
Signed-off-by: Doron Roberts-Kedes <doronrk@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Code at line 1850 is unreachable. Fix this by removing the break
statement above it, so the code for case RTM_GETCHAIN can be
properly executed.

Addresses-Coverity-ID: 1472050 ("Structurally dead code")
Fixes: 32a4f5ec ("net: sched: introduce chain object to uapi")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The tunnel reception hook is only used by l2tp_ppp for skipping PPP
framing bytes. This is a session specific operation, but once a PPP
session sets ->recv_payload_hook on its tunnel, all frames received by
the tunnel will enter pppol2tp_recv_payload_hook(), including those
targeted at Ethernet sessions (an L2TPv3 tunnel can multiplex PPP and
Ethernet sessions).

So this mechanism is wrong, and uselessly complex. Let's just move this
functionality to the pppol2tp rx handler and drop ->recv_payload_hook.
Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>

when tipc_own_id failed to obtain node identity,dev_put should
be call before return -EINVAL.

Fixes: 682cd3cf ("tipc: confgiure and apply UDP bearer MTU on running links")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Removed checks against non-NULL before calling kfree_skb() and
crypto_free_aead(). These functions are safe to be called with NULL
as an argument.
Signed-off-by: Vakul Garg <vakul.garg@nxp.com>
Acked-by: Dave Watson <davejwatson@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This will allow to install a child qdisc under cbs. The main use case
is to install ETF (Earliest TxTime First) qdisc under cbs, so there's
another level of control for time-sensitive traffic.
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Fixes the following sparse warning:

drivers/net/ethernet/hisilicon/hns/hns_ae_adapt.c:73:20: warning: symbol 'hns_ae_get_handle' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_ae_adapt.c:332:6: warning: symbol 'hns_ae_stop' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_ae_adapt.c:360:6: warning: symbol 'hns_ae_toggle_ring_irq' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_ae_adapt.c:580:6: warning: symbol 'hns_ae_update_stats' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_ae_adapt.c:663:6: warning: symbol 'hns_ae_get_stats' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_ae_adapt.c:695:6: warning: symbol 'hns_ae_get_strings' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_ae_adapt.c:728:5: warning: symbol 'hns_ae_get_sset_count' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_ae_adapt.c:774:6: warning: symbol 'hns_ae_update_led_status' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_ae_adapt.c:786:5: warning: symbol 'hns_ae_cpld_set_led_id' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_ae_adapt.c:798:6: warning: symbol 'hns_ae_get_regs' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_ae_adapt.c:823:5: warning: symbol 'hns_ae_get_regs_len' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_dsaf_gmac.c:342:6: warning: symbol 'hns_gmac_update_stats' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c:934:12: warning: symbol 'hns_mac_get_vaddr' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c:953:5: warning: symbol 'hns_mac_get_cfg' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c:343:6: warning: symbol 'hns_dsaf_srst_chns' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c:366:1: warning: symbol 'hns_dsaf_srst_chns_acpi' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c:373:6: warning: symbol 'hns_dsaf_roce_srst' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c:387:6: warning: symbol 'hns_dsaf_roce_srst_acpi' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c:571:5: warning: symbol 'hns_mac_get_sfp_prsnt' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c:589:5: warning: symbol 'hns_mac_get_sfp_prsnt_acpi' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c:31:12: warning: symbol 'g_dsaf_mode_match' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c:45:5: warning: symbol 'hns_dsaf_get_cfg' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c:962:6: warning: symbol 'hns_dsaf_tcam_addr_get' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c:2087:6: warning: symbol 'hns_dsaf_port_work_rate_cfg' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c:2837:5: warning: symbol 'hns_dsaf_roce_reset' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c:76:5: warning: symbol 'hns_ppe_common_get_cfg' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c:107:6: warning: symbol 'hns_ppe_common_free_cfg' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c:340:6: warning: symbol 'hns_ppe_uninit_ex' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.c:708:5: warning: symbol 'hns_rcb_get_ring_num' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.c:744:14: warning: symbol 'hns_rcb_common_get_vaddr' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_dsaf_xgmac.c:314:6: warning: symbol 'hns_xgmac_update_stats' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_enet.c:1303:6: warning: symbol 'hns_nic_update_stats' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_enet.c:1585:6: warning: symbol 'hns_nic_poll_controller' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_enet.c:1938:6: warning: symbol 'hns_set_multicast_list' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_enet.c:1960:6: warning: symbol 'hns_nic_set_rx_mode' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_ethtool.c:661:6: warning: symbol 'hns_get_ringparam' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_ethtool.c:811:6: warning: symbol 'hns_get_channels' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_ethtool.c:828:6: warning: symbol 'hns_get_ethtool_stats' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_ethtool.c:886:6: warning: symbol 'hns_get_strings' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_ethtool.c:976:5: warning: symbol 'hns_get_sset_count' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_ethtool.c:1010:5: warning: symbol 'hns_phy_led_set' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_ethtool.c:1032:5: warning: symbol 'hns_set_phys_id' was not declared. Should it be static?
drivers/net/ethernet/hisilicon/hns/hns_ethtool.c:1106:6: warning: symbol 'hns_get_regs' was not declared. Should it be static?
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add the tls binary to .gitignore

Fixes: 7f657d5b ("selftests: tls: add selftests for TLS sockets")
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This change is meant to allow us to take completion time into account when
disabling queues. Previously we were just working with hard coded values
for how long we should wait. This worked fine for the standard case where
completion timeout was operating in the 50us to 50ms range, however on
platforms that have higher completion timeout times this was resulting in
Rx queues disable messages being displayed as we weren't waiting long
enough for outstanding Rx DMA completions.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Don Buchholz <donald.buchholz@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

This change is meant to help reduce the time needed to shutdown the
transmit and receive paths for the device. Specifically what we now do
after this patch is disable the transmit path first at the netdev level,
and then work on disabling the Rx. This way while we are waiting on the Rx
queues to be disabled the Tx queues have an opportunity to drain out.

In addition I have dropped the 10ms timeout that was left in the ixgbe_down
function that seems to have been carried through from back in e1000 as far
as I can tell. We shouldn't need it since we don't actually disable the Tx
until much later and we have additional logic in place for verifying the Tx
queues have been disabled.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Don Buchholz <donald.buchholz@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

igb writes to doorbells to post transmit and receive descriptors;
after writing descriptors to memory but before writing to doorbells,
use dma_wmb() rather than wmb(). wmb() is more heavyweight than
necessary before doorbell writes.

On x86, this avoids SFENCEs before doorbell writes in both the
tx and rx refill paths.
Signed-off-by: Venkatesh Srinivas <venkateshs@google.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch reverts two previous applied patches to fix an issue
that appeared when using SGMII based SFP modules. In the current
state the driver will try to reset the PHY before obtaining the
phy_addr of the SGMII attached PHY. That leads to an error in
e1000_write_phy_reg_sgmii_82575. Causing the initialization to
fail:

    igb: Intel(R) Gigabit Ethernet Network Driver - version 5.4.0-k
    igb: Copyright (c) 2007-2014 Intel Corporation.
    igb: probe of ????:??:??.? failed with error -3

The patches being reverted are:

    commit 18278533
    Author: Aaron Sierra <asierra@xes-inc.com>
    Date:   Tue Nov 29 10:03:56 2016 -0600

        igb: reset the PHY before reading the PHY ID

    commit 440aeca4
    Author: Matwey V Kornilov <matwey@sai.msu.ru>
    Date:   Thu Nov 24 13:32:48 2016 +0300

         igb: Explicitly select page 0 at initialization

The first reverted patch directly causes the problem mentioned above.
In case of SGMII the phy_addr is not known at this point and will
only be obtained by 'igb_get_phy_id_82575' further down in the code.
The second removed patch selects forces selection of page 0 in the
PHY. Something that the reset tries to address as well.

As pointed out by Alexander Duzck, the patch below fixes the same
issue but in the proper location:

    commit 4e684f59
    Author: Chris J Arges <christopherarges@gmail.com>
    Date:   Wed Nov 2 09:13:42 2016 -0500

        igb: Workaround for igb i210 firmware issue

Reverts: 440aeca4.
Reverts: 18278533.
Signed-off-by: Christian Grönke <c.groenke@infodas.de>
Reviewed-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Add the ixgbe's security configuration registers into
the register dump.
Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

XDP does not support jumbo frames or LRO.  These checks are being made
outside the driver when an XDP program is loaded, however, there is
nothing preventing these from changing after an XDP program is loaded.
Add the checks so that while an XDP program is loaded, do not allow MTU
to be changed or LRO to be enabled.
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Currently, code at label *out* is unreachable. Fix this by updating
variable *ret* with -EINVAL, so the jump to *out* can be properly
executed instead of directly returning from function.

Addresses-Coverity-ID: 1472059 ("Structurally dead code")
Fixes: 1e2b44e7 ("rds: Enable RDS IPv6 support")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Acked-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Build error, implicit declaration of function __inet6_ehashfn shows up
When RDS is enabled but not IPV6.
net/rds/connection.c: In function ‘rds_conn_bucket’:
net/rds/connection.c:67:9: error: implicit declaration of function ‘__inet6_ehashfn’; did you mean ‘__inet_ehashfn’? [-Werror=implicit-function-declaration]
  hash = __inet6_ehashfn(lhash, 0, fhash, 0, rds_hash_secret);
         ^~~~~~~~~~~~~~~
         __inet_ehashfn

Current code adds IPV6 as a depends on in config RDS.

Fixes: eee2fa6a ("rds: Changing IP address internal representation to struct in6_addr")
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Ursula Braun says:

====================
net/smc: patches 2018-07-25

here are 4 more patches for SMC: The first one is just a small
code cleanup in preparation for patch 2. Patch 2 switches to the
use of the vlan-gid for VLAN traffic. Patch 3 improves diagnosis
when creating SMC connections. Patch 4 improves synchronization
between local and remote link groups.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Send an orderly DELETE LINK request before termination of a link group,
add support for client triggered DELETE LINK processing. And send a
disorderly DELETE LINK before module is unloaded.
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Remember the fallback reason code and the peer diagnosis code for
smc sockets, and provide them in smc_diag.c to the netlink interface.
And add more detailed reason codes.
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

SMC code uses the base gid for VLAN traffic. The gids exchanged in
the CLC handshake and the gid index used for the QP have to switch
from the base gid to the appropriate vlan gid.

When searching for a matching IB device port for a certain vlan
device, it does not make sense to return an IB device port, which
is not enabled for the used vlan_id. Add another check whether a
vlan gid exists for a certain IB device port.
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Link confirmation will always be sent across the new link being
confirmed. This allows to shrink the parameter list.
No functional change.
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Jakub Kicinski says:

====================
nfp: protect from theoretical size overflows and SR-IOV errors

This small set changes the handling of pci_sriov_set_totalvfs() errors.
nfp is the only driver which fails probe on pci_sriov_set_totalvfs()
errors.  It turns out some BIOS configurations may break SR-IOV and
users who don't use that feature should not suffer.

Remaining patches makes sure we use overflow-safe function for ring
allocation, even though ring sizes are limited.  It won't hurt and
we can also enable fallback to vmalloc() if memory is tight while
at it.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Use array_size() and store the size as full size_t to protect from
theoretical size overflow when handling HW descriptor rings.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Commit 7f1c684a ("nfp: setup xdp_rxq_info") mixed the cache
cold and cache hot data in the nfp_net_rx_ring structure (ignoring
the feedback), to try to fit the structure into 2 cache lines
after struct xdp_rxq_info was added.  Now that we are about to add
a new field the structure will grow back to 3 cache lines, so
order the members correctly.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Use kvcalloc() instead of tmp variable + kzalloc() when allocating
SW buffer information to allow falling back to vmalloc and to protect
from theoretical integer overflow.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>