platform/kernel/linux-starfive.git
4 years agonet/mlx5e: Add helper to get RQ WQE's head
Aya Levin [Thu, 30 Apr 2020 10:36:26 +0000 (13:36 +0300)]
net/mlx5e: Add helper to get RQ WQE's head

Add helper which retrieves the RQ WQE's head. Use this helper in RX
reporter diagnose callback.

Signed-off-by: Aya Levin <ayal@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5e: Move RQ helpers to txrx.h
Aya Levin [Thu, 30 Apr 2020 10:30:51 +0000 (13:30 +0300)]
net/mlx5e: Move RQ helpers to txrx.h

Use txrx.h to contain helper function regarding TX/RX. In the coming
patches, I will add more RQ helpers.

Signed-off-by: Aya Levin <ayal@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5e: Align RX/TX reporters diagnose output format
Aya Levin [Thu, 30 Apr 2020 09:18:22 +0000 (12:18 +0300)]
net/mlx5e: Align RX/TX reporters diagnose output format

Change the hierarchy of the RX reporter 'Common config' in the diagnose
output to match the 'Common config' of the TX reporter which reflects
that CQ is a helper to the traffic queues.

Before:
$ devlink health diagnose pci/0000:00:0b.0 reporter rx
Common config:
    RQ:
      type: 2 stride size: 2048 size: 8
    CQ:
      stride size: 64 size: 1024
    RQs:
    ...

After:
$ devlink health diagnose pci/0000:00:0b.0 reporter rx
Common config:
    RQ:
      type: 2 stride size: 2048 size: 8
      CQ:
        stride size: 64 size: 1024
    RQs:
    ...

Signed-off-by: Aya Levin <ayal@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5e: Remove redundant RQ state query
Aya Levin [Thu, 30 Apr 2020 08:24:41 +0000 (11:24 +0300)]
net/mlx5e: Remove redundant RQ state query

When received a CQE error, the driver inspect the syndrome given by the
firmware. RQ recovery is initiated only as a result of a fatal syndrome;
syndrome which set the RQ into an error state. Hence no need to query
the RQ state at the beginning of the recovery process. Add additional
debug prints before recovering.

Signed-off-by: Aya Levin <ayal@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5e: Add a flush timeout define
Aya Levin [Thu, 30 Apr 2020 15:50:49 +0000 (18:50 +0300)]
net/mlx5e: Add a flush timeout define

During queue's recovery, driver waits for flush. The flush timeout is
set to 2 seconds. Add a define for this value for the benefit of RX and
TX reporters.

Signed-off-by: Aya Levin <ayal@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5e: Change reporters create functions to return void
Eran Ben Elisha [Mon, 6 Apr 2020 13:00:35 +0000 (16:00 +0300)]
net/mlx5e: Change reporters create functions to return void

Creation of devlink health reporters is not fatal for mlx5e instance load.
In case of error in reporter's creation, the return value is ignored.
Change all reporters creation functions to return void.

In addition, with this change, a failure in creating a reporter, will not
prevent the driver from trying to create the next reporter in the list.

Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Reviewed-by: Aya Levin <ayal@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agoMerge branch 'sfc-prerequisites-for-EF100-driver-part-3'
David S. Miller [Thu, 2 Jul 2020 21:47:40 +0000 (14:47 -0700)]
Merge branch 'sfc-prerequisites-for-EF100-driver-part-3'

Edward Cree says:

====================
sfc: prerequisites for EF100 driver, part 3

Continuing on from [1] and [2], this series assembles the last pieces
 of the common codebase that will be used by the forthcoming EF100
 driver.
Patch #1 also adds a minor feature to EF10 (setting MTU on VFs) since
 EF10 supports the same MCDI extension which that feature will use on
 EF100.
Patches #5 & #7, while they should have no externally-visible effect
 on driver functionality, change how that functionality is implemented
 and how the driver represents TXQ configuration internally, so are
 not mere cleanup/refactoring like most of these prerequisites have
 (from the perspective of the existing sfc driver) been.

Changes in v2:
* Patch #1: use efx_mcdi_set_mtu() directly, instead of as a fallback,
  in the mtu_only case (Jakub)
* Patch #3: fix symbol collision in non-modular builds by renaming
  interrupt_mode to efx_interrupt_mode (kernel test robot)
* Patch #6: check for failure of netif_set_real_num_[tr]x_queues (Jakub)
* Patch #12: cleaner solution for ethtool drvinfo (Jakub, David)

[1]: https://lore.kernel.org/netdev/20200629.173812.1532344417590172093.davem@davemloft.net/T/
[2]: https://lore.kernel.org/netdev/20200630.130923.402514193016248355.davem@davemloft.net/T/
====================

Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosfc_ef100: helper function to set default RSS table of given size
Edward Cree [Thu, 2 Jul 2020 16:34:43 +0000 (17:34 +0100)]
sfc_ef100: helper function to set default RSS table of given size

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosfc_ef100: NVRAM selftest support code
Edward Cree [Thu, 2 Jul 2020 16:34:27 +0000 (17:34 +0100)]
sfc_ef100: NVRAM selftest support code

We have yet another new scheme for NVRAM, and a corresponding new MCDI.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosfc_ef100: populate BUFFER_SIZE_BYTES in INIT_RXQ
Edward Cree [Thu, 2 Jul 2020 16:32:24 +0000 (17:32 +0100)]
sfc_ef100: populate BUFFER_SIZE_BYTES in INIT_RXQ

The QDMA subsystem on EF100 needs this information.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosfc_ef100: add EF100 to NIC-revision enumeration
Edward Cree [Thu, 2 Jul 2020 16:32:04 +0000 (17:32 +0100)]
sfc_ef100: add EF100 to NIC-revision enumeration

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosfc: get drvinfo driver name from outside the common code
Edward Cree [Thu, 2 Jul 2020 16:31:43 +0000 (17:31 +0100)]
sfc: get drvinfo driver name from outside the common code

Since ethtool_common.o will be built into both sfc and sfc_ef100 drivers,
 it can't use KBUILD_MODNAME directly.  Instead, make it reference a
 string provided by the individual driver code.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosfc: initialise RSS context ID to 'no RSS context' in efx_init_struct()
Edward Cree [Thu, 2 Jul 2020 16:31:19 +0000 (17:31 +0100)]
sfc: initialise RSS context ID to 'no RSS context' in efx_init_struct()

Previously this was only happening in ef10-specific code.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosfc: commonise efx_fini_dmaq
Edward Cree [Thu, 2 Jul 2020 16:30:56 +0000 (17:30 +0100)]
sfc: commonise efx_fini_dmaq

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosfc: factor out efx_mcdi_filter_table_down() from _remove()
Edward Cree [Thu, 2 Jul 2020 16:30:39 +0000 (17:30 +0100)]
sfc: factor out efx_mcdi_filter_table_down() from _remove()

_down() merely removes all our filters and VLANs, it doesn't free
 efx->filter_state itself.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosfc: don't call tx_limit_len if NIC type doesn't have one
Edward Cree [Thu, 2 Jul 2020 16:30:23 +0000 (17:30 +0100)]
sfc: don't call tx_limit_len if NIC type doesn't have one

EF100 doesn't need to split up large DMAs.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosfc: assign TXQs without gaps
Edward Cree [Thu, 2 Jul 2020 16:29:58 +0000 (17:29 +0100)]
sfc: assign TXQs without gaps

Since we only allocate VIs for the number of TXQs we actually need, we
 cannot naively use "channel * TXQ_TYPES + txq" for the TXQ number, as
 this has gaps (when efx->tx_queues_per_channel < EFX_TXQ_TYPES) and
 thus overruns the driver's VI allocations, causing the firmware to
 reject the MC_CMD_INIT_TXQ based on INSTANCE.
Thus, we distinguish INSTANCE (stored in tx_queue->queue) from LABEL
 (tx_queue->label); the former is allocated starting from 0 in
 efx_set_channels(), while the latter is simply the txq type (index in
 channel->tx_queue array).
To simplify things, rather than changing tx_queues_per_channel after
 setting up TXQs, make Siena always probe its HIGHPRI queues at start
 of day, rather than deferring it until tc mqprio enables them.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosfc: commonise netif_set_real_num[tr]x_queues calls
Edward Cree [Thu, 2 Jul 2020 16:29:40 +0000 (17:29 +0100)]
sfc: commonise netif_set_real_num[tr]x_queues calls

While we're at it, also check them for failure.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosfc: make tx_queues_per_channel variable at runtime
Edward Cree [Thu, 2 Jul 2020 16:29:24 +0000 (17:29 +0100)]
sfc: make tx_queues_per_channel variable at runtime

Siena needs four TX queues (csum * highpri), EF10 needs two (csum),
 and EF100 only needs one (as checksumming is controlled entirely by
 the transmit descriptor).  Rather than having various bits of ad-hoc
 code to decide which queues to set up etc., put the knowledge of how
 many TXQs a channel has in one place.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosfc: move modparam 'rss_cpus' out of common channel code
Edward Cree [Thu, 2 Jul 2020 16:29:09 +0000 (17:29 +0100)]
sfc: move modparam 'rss_cpus' out of common channel code

Instead of exposing this old module parameter on the new driver (thus
 having to keep it forever after for compatibility), let's confine it
 to the old one; if we find later that we need the feature, we ought
 to support it properly, with ethtool set-channels.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosfc: move modparam 'interrupt_mode' out of common channel code
Edward Cree [Thu, 2 Jul 2020 16:28:13 +0000 (17:28 +0100)]
sfc: move modparam 'interrupt_mode' out of common channel code

EF100 only supports MSI-X, so there's no need for the new driver to
 expose this old module parameter.
Since it's now visible to the linker, we have to rename it internally
 to efx_interrupt_mode to avoid symbol collisions in non-modular
 builds.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosfc: remove max_interrupt_mode
Edward Cree [Thu, 2 Jul 2020 16:27:51 +0000 (17:27 +0100)]
sfc: remove max_interrupt_mode

All NICs supported by this driver are capable of MSI-X interrupts (only
 Falcon A1 wasn't, and that's now hived off into its own driver), so no
 need for a nic-type parameter.  Besides, the code that checked it was
 buggy anyway (the following assignment that checked min_interrupt_mode
 overrode it).

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosfc: support setting MTU even if not privileged to configure MAC fully
Edward Cree [Thu, 2 Jul 2020 16:27:35 +0000 (17:27 +0100)]
sfc: support setting MTU even if not privileged to configure MAC fully

Unprivileged functions (such as VFs) may set their MTU by use of the
 'control' field of MC_CMD_SET_MAC_EXT, as used in efx_mcdi_set_mtu().
If calling efx_ef10_mac_reconfigure() from efx_change_mtu(), and the
 NIC supports the above (SET_MAC_ENHANCED capability), use it rather
 than efx_mcdi_set_mac().

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoxen-netfront: remove redundant assignment to variable 'act'
Colin Ian King [Thu, 2 Jul 2020 14:22:23 +0000 (15:22 +0100)]
xen-netfront: remove redundant assignment to variable 'act'

The variable act is being initialized with a value that is
never read and it is being updated later with a new value. The
initialization is redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'net-ipa-simplify-endpoint-programming'
David S. Miller [Thu, 2 Jul 2020 21:31:21 +0000 (14:31 -0700)]
Merge branch 'net-ipa-simplify-endpoint-programming'

Alex Elder says:

====================
net: ipa: simplify endpoint programming

Add tests to functions so they don't update undefined endpoint
registers, rather than requiring the caller to avoid calling them.

Move the call to a workaround function required when suspending
inside the function that puts an endpoint into suspend mode.  This
requires moving a few functions (which are otherwise unchanged).

Then simplify ipa_endpoint_program() to call essentially all
endpoint register update functions unconditionally.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ipa: simplify ipa_endpoint_program()
Alex Elder [Thu, 2 Jul 2020 11:25:37 +0000 (06:25 -0500)]
net: ipa: simplify ipa_endpoint_program()

Have functions that write endpoint configuration registers return
immediately if they are not valid for the direction of transfer for
the endpoint.  This allows most of the calls in ipa_endpoint_program()
to be made unconditionally.  Reorder the register writes to match
the order of their definition (based on offset).

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ipa: move version test inside ipa_endpoint_program_suspend()
Alex Elder [Thu, 2 Jul 2020 11:25:36 +0000 (06:25 -0500)]
net: ipa: move version test inside ipa_endpoint_program_suspend()

IPA version 4.0+ does not support endpoint suspend.  Put a test at
the top of ipa_endpoint_program_suspend() that returns immediately
if suspend is not supported rather than making that check in the caller.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ipa: always handle suspend workaround
Alex Elder [Thu, 2 Jul 2020 11:25:35 +0000 (06:25 -0500)]
net: ipa: always handle suspend workaround

IPA version 3.5.1 has a hardware quirk that requires special
handling if an RX endpoint is suspended while aggregation is active.
This handling is implemented by ipa_endpoint_suspend_aggr().

Have ipa_endpoint_program_suspend() be responsible for calling
ipa_endpoint_suspend_aggr() if suspend mode is being enabled on
an endpoint.  If the endpoint does not support aggregation, or if
aggregation isn't active, this call will continue to have no effect.

Move the definition of ipa_endpoint_suspend_aggr() up in the file so
its definition precedes the new earlier reference to it.  This
requires ipa_endpoint_aggr_active() and ipa_endpoint_force_close()
to be moved as well.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ipa: move version test inside ipa_endpoint_program_delay()
Alex Elder [Thu, 2 Jul 2020 11:25:34 +0000 (06:25 -0500)]
net: ipa: move version test inside ipa_endpoint_program_delay()

IPA version 4.2 has a hardware quirk that affects endpoint delay
mode, so it isn't used there.  Isolate the test that avoids using
delay mode for that version inside ipa_endpoint_program_delay(),
rather than making that check in the caller.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomlx4: Mark PM functions as __maybe_unused
Wei Yongjun [Thu, 2 Jul 2020 09:19:46 +0000 (17:19 +0800)]
mlx4: Mark PM functions as __maybe_unused

In certain configurations without power management support, the
following warnings happen:

drivers/net/ethernet/mellanox/mlx4/main.c:4388:12:
 warning: 'mlx4_resume' defined but not used [-Wunused-function]
 4388 | static int mlx4_resume(struct device *dev_d)
      |            ^~~~~~~~~~~
drivers/net/ethernet/mellanox/mlx4/main.c:4373:12: warning:
 'mlx4_suspend' defined but not used [-Wunused-function]
 4373 | static int mlx4_suspend(struct device *dev_d)
      |            ^~~~~~~~~~~~

Mark these functions as __maybe_unused to make it clear to the
compiler that this is going to happen based on the configuration,
which is the standard for these types of functions.

Fixes: 0e3e206a3e12 ("mlx4: use generic power management")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoksz884x: mark pcidev_suspend() as __maybe_unused
Wei Yongjun [Thu, 2 Jul 2020 09:18:10 +0000 (17:18 +0800)]
ksz884x: mark pcidev_suspend() as __maybe_unused

In certain configurations without power management support, gcc report
the following warning:

drivers/net/ethernet/micrel/ksz884x.c:7182:12: warning:
 'pcidev_suspend' defined but not used [-Wunused-function]
 7182 | static int pcidev_suspend(struct device *dev_d)
      |            ^~~~~~~~~~~~~~

Mark pcidev_suspend() as __maybe_unused to make it clear.

Fixes: 64120615d140 ("ksz884x: use generic power management")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'net-macb-few-code-cleanups'
David S. Miller [Thu, 2 Jul 2020 21:22:00 +0000 (14:22 -0700)]
Merge branch 'net-macb-few-code-cleanups'

Claudiu Beznea says:

====================
net: macb: few code cleanups

Patches in this series cleanup a bit macb code.

Changes in v2:
- in patch 2/4 use hweight32() instead of hweight_long()
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: macb: remove is_udp variable
Claudiu Beznea [Thu, 2 Jul 2020 09:06:01 +0000 (12:06 +0300)]
net: macb: remove is_udp variable

Remove is_udp variable that is used in only one place and use
ip_hdr(skb)->protocol == IPPROTO_UDP check instead.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: macb: do not initialize queue variable
Claudiu Beznea [Thu, 2 Jul 2020 09:06:00 +0000 (12:06 +0300)]
net: macb: do not initialize queue variable

Do not initialize queue variable. It is already initialized in for loops.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: macb: use hweight32() to count set bits in queue_mask
Claudiu Beznea [Thu, 2 Jul 2020 09:05:59 +0000 (12:05 +0300)]
net: macb: use hweight32() to count set bits in queue_mask

Use hweight32() to count set bits in queue_mask.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: macb: do not set again bit 0 of queue_mask
Claudiu Beznea [Thu, 2 Jul 2020 09:05:58 +0000 (12:05 +0300)]
net: macb: do not set again bit 0 of queue_mask

Bit 0 of queue_mask is set at the beginning of
macb_probe_queues() function. Do not set it again after reading
DGFG6 but instead use "|=" operator.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'bridge-mrp-Add-support-for-getting-the-status'
David S. Miller [Thu, 2 Jul 2020 21:19:15 +0000 (14:19 -0700)]
Merge branch 'bridge-mrp-Add-support-for-getting-the-status'

Horatiu Vultur says:

====================
bridge: mrp: Add support for getting the status

This patch series extends the MRP netlink interface to allow the userspace
daemon to get the status of the MRP instances in the kernel.

v3:
  - remove misleading comment
  - fix to use correctly the RCU

v2:
  - fix sparse warnings
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agobridge: Extend br_fill_ifinfo to return MPR status
Horatiu Vultur [Thu, 2 Jul 2020 08:13:07 +0000 (10:13 +0200)]
bridge: Extend br_fill_ifinfo to return MPR status

This patch extends the function br_fill_ifinfo to return also the MRP
status for each instance on a bridge. It also adds a new filter
RTEXT_FILTER_MRP to return the MRP status only when this is set, not to
interfer with the vlans. The MRP status is return only on the bridge
interfaces.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agobridge: mrp: Add br_mrp_fill_info
Horatiu Vultur [Thu, 2 Jul 2020 08:13:06 +0000 (10:13 +0200)]
bridge: mrp: Add br_mrp_fill_info

Add the function br_mrp_fill_info which populates the MRP attributes
regarding the status of each MRP instance.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agobridge: uapi: mrp: Extend MRP attributes to get the status
Horatiu Vultur [Thu, 2 Jul 2020 08:13:05 +0000 (10:13 +0200)]
bridge: uapi: mrp: Extend MRP attributes to get the status

Add MRP attribute IFLA_BRIDGE_MRP_INFO to allow the userspace to get the
current state of the MRP instances. This is a nested attribute that
contains other attributes like, ring id, index of primary and secondary
port, priority, ring state, ring role.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'mptcp-add-receive-buffer-auto-tuning'
David S. Miller [Thu, 2 Jul 2020 00:47:55 +0000 (17:47 -0700)]
Merge branch 'mptcp-add-receive-buffer-auto-tuning'

Florian Westphal says:

====================
mptcp: add receive buffer auto-tuning

First patch extends the test script to allow for reproducible results.
Second patch adds receive auto-tuning.  Its based on what TCP is doing,
only difference is that we use the largest RTT of any of the subflows
and that we will update all subflows with the new value.

Else, we get spurious packet drops because the mptcp work queue might
not be able to move packets from subflow socket to master socket
fast enough.  Without the adjustment, TCP may drop the packets because
the subflow socket is over its rcvbuffer limit.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomptcp: add receive buffer auto-tuning
Florian Westphal [Tue, 30 Jun 2020 19:24:45 +0000 (21:24 +0200)]
mptcp: add receive buffer auto-tuning

When mptcp is used, userspace doesn't read from the tcp (subflow)
socket but from the parent (mptcp) socket receive queue.

skbs are moved from the subflow socket to the mptcp rx queue either from
'data_ready' callback (if mptcp socket can be locked), a work queue, or
the socket receive function.

This means tcp_rcv_space_adjust() is never called and thus no receive
buffer size auto-tuning is done.

An earlier (not merged) patch added tcp_rcv_space_adjust() calls to the
function that moves skbs from subflow to mptcp socket.
While this enabled autotuning, it also meant tuning was done even if
userspace was reading the mptcp socket very slowly.

This adds mptcp_rcv_space_adjust() and calls it after userspace has
read data from the mptcp socket rx queue.

Its very similar to tcp_rcv_space_adjust, with two differences:

1. The rtt estimate is the largest one observed on a subflow
2. The rcvbuf size and window clamp of all subflows is adjusted
   to the mptcp-level rcvbuf.

Otherwise, we get spurious drops at tcp (subflow) socket level if
the skbs are not moved to the mptcp socket fast enough.

Before:
time mptcp_connect.sh -t -f $((4*1024*1024)) -d 300 -l 0.01% -r 0 -e "" -m mmap
[..]
ns4 MPTCP -> ns3 (10.0.3.2:10108      ) MPTCP   (duration 40823ms) [ OK ]
ns4 MPTCP -> ns3 (10.0.3.2:10109      ) TCP     (duration 23119ms) [ OK ]
ns4 TCP   -> ns3 (10.0.3.2:10110      ) MPTCP   (duration  5421ms) [ OK ]
ns4 MPTCP -> ns3 (dead:beef:3::2:10111) MPTCP   (duration 41446ms) [ OK ]
ns4 MPTCP -> ns3 (dead:beef:3::2:10112) TCP     (duration 23427ms) [ OK ]
ns4 TCP   -> ns3 (dead:beef:3::2:10113) MPTCP   (duration  5426ms) [ OK ]
Time: 1396 seconds

After:
ns4 MPTCP -> ns3 (10.0.3.2:10108      ) MPTCP   (duration  5417ms) [ OK ]
ns4 MPTCP -> ns3 (10.0.3.2:10109      ) TCP     (duration  5427ms) [ OK ]
ns4 TCP   -> ns3 (10.0.3.2:10110      ) MPTCP   (duration  5422ms) [ OK ]
ns4 MPTCP -> ns3 (dead:beef:3::2:10111) MPTCP   (duration  5415ms) [ OK ]
ns4 MPTCP -> ns3 (dead:beef:3::2:10112) TCP     (duration  5422ms) [ OK ]
ns4 TCP   -> ns3 (dead:beef:3::2:10113) MPTCP   (duration  5423ms) [ OK ]
Time: 296 seconds

Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoselftests: mptcp: add option to specify size of file to transfer
Florian Westphal [Tue, 30 Jun 2020 19:24:44 +0000 (21:24 +0200)]
selftests: mptcp: add option to specify size of file to transfer

The script generates two random files that are then sent via tcp and
mptcp connections.

In order to compare throughput over consecutive runs add an option
to provide the file size on the command line: "-f 128000".

Also add an option, -t, to enable tcp tests. This is useful to
compare throughput of mptcp connections and tcp connections.

Example: run tests with a 4mb file size, 300ms delay 0.01% loss,
default gso/tso/gro settings and with large write/blocking io:

mptcp_connect.sh -t -f $((4 * 1024 * 1024)) -d 300 -l 0.01%  -r 0 -e "" -m mmap

Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: sched: Allow changing default qdisc to FQ-PIE
Danny Lin [Wed, 1 Jul 2020 23:01:52 +0000 (16:01 -0700)]
net: sched: Allow changing default qdisc to FQ-PIE

Similar to fq_codel and the other qdiscs that can set as default,
fq_pie is also suitable for general use without explicit configuration,
which makes it a valid choice for this.

This is useful in situations where a painless out-of-the-box solution
for reducing bufferbloat is desired but fq_codel is not necessarily the
best choice. For example, fq_pie can be better for DASH streaming, but
there could be more cases where it's the better choice of the two simple
AQMs available in the kernel.

Signed-off-by: Danny Lin <danny@kdrag0n.dev>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next...
David S. Miller [Thu, 2 Jul 2020 00:41:56 +0000 (17:41 -0700)]
Merge branch '40GbE' of git://git./linux/kernel/git/jkirsher/next-queue

Tony Nguyen says:

====================
Intel Wired LAN Driver Updates 2020-07-01

This series contains updates to all Intel drivers, but a majority of the
changes are to the i40e driver.

Jeff converts 'fall through' comments to the 'fallthrough;' keyword for
all Intel drivers. Removed unnecessary delay in the ixgbe ethtool
diagnostics test.

Arkadiusz implements Total Port Shutdown for i40e. This is the revised
patch based on Jakub's feedback from an earlier submission of this
patch, where additional code comments and description was needed to
describe the functionality.

Wei Yongjun fixes return error code for iavf_init_get_resources().

Magnus optimizes XDP code in i40e; starting with AF_XDP zero-copy
transmit completion path. Then by only executing a division when
necessary in the napi_poll data path. Move the check for transmit ring
full outside the send loop to increase performance.

Ciara add XDP ring statistics to i40e and the ability to dump these
statistics and descriptors.

Tony fixes reporting iavf statistics.

Radoslaw adds support for 2.5 and 5 Gbps by implementing the newer ethtool
ksettings API in ixgbe.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next...
David S. Miller [Thu, 2 Jul 2020 00:25:00 +0000 (17:25 -0700)]
Merge branch '100GbE' of git://git./linux/kernel/git/jkirsher/next-queue

Tony Nguyen says:

====================
100GbE Intel Wired LAN Driver Updates 2020-07-01

This series contains updates to the ice driver only.

Jacob implements a devlink region for device capabilities.

Bruce removes structs containing only one-element arrays that are either
unused or only used for indexing. Instead, use pointer arithmetic or
other indexing to access the elements. Converts "C struct hack"
variable-length types to the preferred C99 flexible array member.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoice: replace single-element array used for C struct hack
Bruce Allan [Tue, 30 Jun 2020 00:27:46 +0000 (17:27 -0700)]
ice: replace single-element array used for C struct hack

Convert the pre-C90-extension "C struct hack" method (using a single-
element array at the end of a structure for implementing variable-length
types) to the preferred use of C99 flexible array member.

Additional code cleanups were done near areas affected by this change.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
4 years agoice: avoid unnecessary single-member variable-length structs
Bruce Allan [Tue, 30 Jun 2020 00:27:45 +0000 (17:27 -0700)]
ice: avoid unnecessary single-member variable-length structs

There are a number of structures that consist of a one-element array as the
only struct member.  Some of those are unused so remove them. Others are
used to index into a buffer/array consisting of a variable number of a
different data or structure type.  Those are unnecessary since we can use
simple pointer arithmetic or index directly into the buffer to access
individual elements of the buffer/array.

Additional code cleanups were done near areas affected by this change.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
4 years agobonding: allow xfrm offload setup post-module-load
Jarod Wilson [Tue, 30 Jun 2020 18:49:41 +0000 (14:49 -0400)]
bonding: allow xfrm offload setup post-module-load

At the moment, bonding xfrm crypto offload can only be set up if the bonding
module is loaded with active-backup mode already set. We need to be able to
make this work with bonds set to AB after the bonding driver has already
been loaded.

So what's done here is:

1) move #define BOND_XFRM_FEATURES to net/bonding.h so it can be used
by both bond_main.c and bond_options.c
2) set BOND_XFRM_FEATURES in bond_dev->hw_features universally, rather than
only when loading in AB mode
3) wire up xfrmdev_ops universally too
4) disable BOND_XFRM_FEATURES in bond_dev->features if not AB
5) exit early (non-AB case) from bond_ipsec_offload_ok, to prevent a
performance hit from traversing into the underlying drivers
5) toggle BOND_XFRM_FEATURES in bond_dev->wanted_features and call
netdev_change_features() from bond_option_mode_set()

In my local testing, I can change bonding modes back and forth on the fly,
have hardware offload work when I'm in AB, and see no performance penalty
to non-AB software encryption, despite having xfrm bits all wired up for
all modes now.

Fixes: 18cb261afd7b ("bonding: support hardware encryption offload to slaves")
Reported-by: Huy Nguyen <huyn@mellanox.com>
CC: Saeed Mahameed <saeedm@mellanox.com>
CC: Jay Vosburgh <j.vosburgh@gmail.com>
CC: Veaceslav Falico <vfalico@gmail.com>
CC: Andy Gospodarek <andy@greyhouse.net>
CC: "David S. Miller" <davem@davemloft.net>
CC: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
CC: Jakub Kicinski <kuba@kernel.org>
CC: Steffen Klassert <steffen.klassert@secunet.com>
CC: Herbert Xu <herbert@gondor.apana.org.au>
CC: netdev@vger.kernel.org
CC: intel-wired-lan@lists.osuosl.org
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoice: implement snapshot for device capabilities
Jacob Keller [Thu, 18 Jun 2020 18:46:11 +0000 (11:46 -0700)]
ice: implement snapshot for device capabilities

Add a new devlink region used for capturing a snapshot of the device
capabilities buffer which is reported by the firmware over the AdminQ.
This information can useful in debugging driver and firmware
interactions.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
4 years agoMerge branch 'net-ipa-endpoint-configuration-updates'
David S. Miller [Wed, 1 Jul 2020 22:30:34 +0000 (15:30 -0700)]
Merge branch 'net-ipa-endpoint-configuration-updates'

Alex Elder says:

====================
net: ipa: endpoint configuration updates

This series updates code that configures IPA endpoints.  The changes
made mainly affect access to registers that are valid only for RX, or
only for TX endpoints.

The first three patches avoid writing endpoint registers if they are
not defined to be valid.  The fourth patch slightly modifies the
parameters for the offset macros used for these endpoint registers,
to make it explicit when only some endpoints are valid.

The last patch just tweaks one line of code so it uses a convention
used everywhere else in the driver.

Version 2 of this series eliminates some of the "assert()" comments
that Jakub inquired about.  The ones removed will actually go away
in an upcoming (not-yet-posted) patch series anyway.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ipa: HOL_BLOCK_EN_FMASK is a 1-bit mask
Alex Elder [Tue, 30 Jun 2020 13:33:04 +0000 (08:33 -0500)]
net: ipa: HOL_BLOCK_EN_FMASK is a 1-bit mask

The convention throughout the IPA driver is to directly use
single-bit field mask values, rather than using (for example)
u32_encode_bits() to set or clear them.

Fix the one place that doesn't follow that convention, which sets
HOL_BLOCK_EN_FMASK in ipa_endpoint_init_hol_block_enable().

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ipa: clarify endpoint register macro constraints
Alex Elder [Tue, 30 Jun 2020 13:33:03 +0000 (08:33 -0500)]
net: ipa: clarify endpoint register macro constraints

A handful of registers are valid only for RX endpoints, and some
others are valid only for TX endpoints.  For these endpoints, add
a comment above their defined offset macro that indicates the
endpoints to which they apply.

Extend the endpoint parameter naming convention as well, to make
these constraints more explicit.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ipa: mode register is TX only
Alex Elder [Tue, 30 Jun 2020 13:33:02 +0000 (08:33 -0500)]
net: ipa: mode register is TX only

The INIT_MODE endpoint configuration register is only valid for TX
endpoints.  Rather than writing a zero to that register for RX
endpoints, avoid writing the register at all.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ipa: metadata_mask register is RX only
Alex Elder [Tue, 30 Jun 2020 13:33:01 +0000 (08:33 -0500)]
net: ipa: metadata_mask register is RX only

The INIT_HDR_METADATA_MASK endpoint configuration register is only
valid for RX endpoints.  Rather than writing a zero to that register
for TX endpoints, avoid writing the register at all.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ipa: head-of-line block registers are RX only
Alex Elder [Tue, 30 Jun 2020 13:33:00 +0000 (08:33 -0500)]
net: ipa: head-of-line block registers are RX only

The INIT_HOL_BLOCK_EN and INIT_HOL_BLOCK_TIMER endpoint registers
are only valid for RX endpoints.

Have ipa_endpoint_modem_hol_block_clear_all() skip writing these
registers for TX endpoints.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'net-ipa-small-improvements'
David S. Miller [Wed, 1 Jul 2020 22:29:07 +0000 (15:29 -0700)]
Merge branch 'net-ipa-small-improvements'

Alex Elder says:

====================
net: ipa: small improvements

This series contains two patches that improve the error output
that's reported when an error occurs while changing the state of a
GSI channel or event ring.  The first ensures all such error
conditions report an error, and the second simplifies the messages a
little and ensures they are all consistent.

A third (independent) patch gets rid of an unused symbol in the
microcontroller code.

Version 2 fixes two alignment problems pointed out by checkpatch.pl,
as requested by Jakub Kicinski.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ipa: kill IPA_MEM_UC_OFFSET
Alex Elder [Tue, 30 Jun 2020 12:58:46 +0000 (07:58 -0500)]
net: ipa: kill IPA_MEM_UC_OFFSET

The microcontroller shared memory area is at the beginning of the
IPA resident memory.  IPA_MEM_UC_OFFSET was defined as the offset
within that region where it's found, but it's 0, and it's never
actually used.  Just get rid of the definition, and move some of the
description it had to be above the definition of the ipa_uc_mem_area
structure.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ipa: standarize more GSI error messages
Alex Elder [Tue, 30 Jun 2020 12:58:45 +0000 (07:58 -0500)]
net: ipa: standarize more GSI error messages

Make minor updates to error messages reported in "gsi.c":
  - Use local variables to reduce multi-line function calls
  - Don't use parentheses in messages
  - Do some slight rewording in a few cases

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ipa: always report GSI state errors
Alex Elder [Tue, 30 Jun 2020 12:58:44 +0000 (07:58 -0500)]
net: ipa: always report GSI state errors

We check the state of an event ring or channel both before and after
any GSI command issued that will change that state.  In most--but
not all--cases, if the state is something different than expected we
report an error message.

Add error messages where missing, so that all unexpected states
provide information about what went wrong.  Drop the parentheses
around the state value shown in all cases.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'net-ipa-simple-refactorizations'
David S. Miller [Wed, 1 Jul 2020 22:27:09 +0000 (15:27 -0700)]
Merge branch 'net-ipa-simple-refactorizations'

Alex Elder says:

====================
net: ipa: simple refactorizations

This series makes three small changes to some endpoint configuration
code.  The first uses a constant to represent the frequency of an
internal clock used for timers in the IPA.  The second modifies a
limit used so it matches Qualcomm's internal code.  And the third
reworks a few lines of code, eliminating a multi-line function call.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ipa: reuse a local variable in ipa_endpoint_init_aggr()
Alex Elder [Mon, 29 Jun 2020 21:55:23 +0000 (16:55 -0500)]
net: ipa: reuse a local variable in ipa_endpoint_init_aggr()

Reuse the "limit" local variable in ipa_endpoint_init_aggr() when
setting the aggregation size limit.  Simple cleanup.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ipa: reduce aggregation time limit
Alex Elder [Mon, 29 Jun 2020 21:55:22 +0000 (16:55 -0500)]
net: ipa: reduce aggregation time limit

Halve the time limit used when aggregation is enabled on an RX
endpoint, to half a millisecond.

Use DIV_ROUND_CLOSEST() to compute the value that represents the
time period, to get better accuracy in the event the time limit is
not an even multiple of the granularity.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ipa: rework ipa_aggr_granularity_val()
Alex Elder [Mon, 29 Jun 2020 21:55:21 +0000 (16:55 -0500)]
net: ipa: rework ipa_aggr_granularity_val()

The timer used for aggregation makes use of an internal 32 KHz clock.
The granularity of the timer is programmed by a field whose value is
computed by ipa_aggr_granularity_val().  Redefine the way that value
is computed by using a new TIMER_FREQUENCY constant representing the
underlying clock frequency.

Add two BUILD_BUG_ON() calls to ensure the value used is valid.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'add-XDP-support-to-xen-netfront'
David S. Miller [Wed, 1 Jul 2020 22:25:14 +0000 (15:25 -0700)]
Merge branch 'add-XDP-support-to-xen-netfront'

Denis Kirjanov says:

====================
xen networking: add XDP support to xen-netfront

The first patch adds a new extra type to enable proper synchronization
between an RX request/response pair.
The second patch implements BFP interface for xen-netfront.
The third patch enables extra space for XDP processing.

v14:
- fixed compilation warnings

v13:
- fixed compilation due to previous rename

v12:
- xen-netback: rename netfront_xdp_headroom to xdp_headroom

v11:
- add the new headroom constant to netif.h
- xenbus_scanf check
- lock a bulk of puckets in xennet_xdp_xmit()

v10:
- add a new xen_netif_extra_info type to enable proper synchronization
 between an RX request/response pair.
- order local variable declarations

v9:
- assign an xdp program before switching to Reconfiguring
- minor cleanups
- address checkpatch issues

v8:
- add PAGE_POOL config dependency
- keep the state of XDP processing in netfront_xdp_enabled
- fixed allocator type in xdp_rxq_info_reg_mem_model()
- minor cleanups in xen-netback

v7:
- use page_pool_dev_alloc_pages() on page allocation
- remove the leftover break statement from netback_changed

v6:
- added the missing SOB line
- fixed subject

v5:
- split netfront/netback changes
- added a sync point between backend/frontend on switching to XDP
- added pagepool API

v4:
- added verbose patch descriprion
- don't expose the XDP headroom offset to the domU guest
- add a modparam to netback to toggle XDP offset
- don't process jumbo frames for now

v3:
- added XDP_TX support (tested with xdping echoserver)
- added XDP_REDIRECT support (tested with modified xdp_redirect_kern)
- moved xdp negotiation to xen-netback

v2:
- avoid data copying while passing to XDP
- tell xen-netback that we need the headroom space
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoxen networking: add XDP offset adjustment to xen-netback
Denis Kirjanov [Mon, 29 Jun 2020 13:13:29 +0000 (16:13 +0300)]
xen networking: add XDP offset adjustment to xen-netback

the patch basically adds the offset adjustment and netfront
state reading to make XDP work on netfront side.

Reviewed-by: Paul Durrant <paul@xen.org>
Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoxen networking: add basic XDP support for xen-netfront
Denis Kirjanov [Mon, 29 Jun 2020 13:13:28 +0000 (16:13 +0300)]
xen networking: add basic XDP support for xen-netfront

The patch adds a basic XDP processing to xen-netfront driver.

We ran an XDP program for an RX response received from netback
driver. Also we request xen-netback to adjust data offset for
bpf_xdp_adjust_head() header space for custom headers.

synchronization between frontend and backend parts is done
by using xenbus state switching:
Reconfiguring -> Reconfigured- > Connected

UDP packets drop rate using xdp program is around 310 kpps
using ./pktgen_sample04_many_flows.sh and 160 kpps without the patch.

Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoxen: netif.h: add a new extra type for XDP
Denis Kirjanov [Mon, 29 Jun 2020 13:13:27 +0000 (16:13 +0300)]
xen: netif.h: add a new extra type for XDP

The patch adds a new extra type to be able to diffirentiate
between RX responses on xen-netfront side with the adjusted offset
required for XDP processing.

The offset value from a guest is passed via xenstore.

Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoixgbe: Add ethtool support to enable 2.5 and 5.0 Gbps support
Radoslaw Tyl [Fri, 26 Jun 2020 13:28:14 +0000 (15:28 +0200)]
ixgbe: Add ethtool support to enable 2.5 and 5.0 Gbps support

Added full support for new version Ethtool API. New API allow use
2500Gbase-T and 5000base-T supported and advertised link speed modes.

Signed-off-by: Radoslaw Tyl <radoslawx.tyl@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
4 years agoixgbe: Cleanup unneeded delay in ethtool test
Jeff Kirsher [Fri, 26 Jun 2020 05:21:41 +0000 (22:21 -0700)]
ixgbe: Cleanup unneeded delay in ethtool test

There is a 4 seconds delay in ixgbe_diag_test() that is holding up other
ioctls such as SIOCGIFCONF that Oracle database applications use.
One of Oracle's product runs "ethtool -t ethX online" periodically for
system monitoring and that is impacting database applications that use
SIOCGIFCONF at that same time.

This 4 second delay was needed in out early 1GbE parts to give the PHY
time to recover from a reset.  This code was carried forward to the 10 GbE
driver even it was not needed for the supported PHYs in the ixgbe driver.

CC: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
CC: Jack Vogel <jack.vogel@oracle.com>
Reported-by: Venkat Venkatsubra <venkat.x.venkatsubra@oracle.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
4 years agoiavf: Fix updating statistics
Tony Nguyen [Wed, 24 Jun 2020 16:04:22 +0000 (09:04 -0700)]
iavf: Fix updating statistics

Commit bac8486116b0 ("iavf: Refactor the watchdog state machine") inverted
the logic for when to update statistics. Statistics should be updated when
no other commands are pending, instead they were only requested when a
command was processed. iavf_request_stats() would see a pending request
and not request statistics to be updated. This caused statistics to never
be updated; fix the logic.

Fixes: bac8486116b0 ("iavf: Refactor the watchdog state machine")
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
4 years agoi40e: introduce new dump desc XDP command
Ciara Loftus [Tue, 23 Jun 2020 13:06:57 +0000 (13:06 +0000)]
i40e: introduce new dump desc XDP command

Interfaces already exist for dumping Rx and Tx descriptor information.
Introduce another for doing the same for XDP descriptors.

Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
4 years agoi40e: add XDP ring statistics to dump VSI debug output
Ciara Loftus [Tue, 23 Jun 2020 13:06:56 +0000 (13:06 +0000)]
i40e: add XDP ring statistics to dump VSI debug output

Prior to this, only the Rx and Tx ring statistics were dumped. The XDP
ring statistics are now dumped as well.

Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
4 years agoi40e: add XDP ring statistics to VSI stats
Ciara Loftus [Tue, 23 Jun 2020 13:06:55 +0000 (13:06 +0000)]
i40e: add XDP ring statistics to VSI stats

Prior to this, only Rx and Tx ring statistics were accounted for.

Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
4 years agoi40e: move check of full Tx ring to outside of send loop
Magnus Karlsson [Tue, 23 Jun 2020 09:44:18 +0000 (11:44 +0200)]
i40e: move check of full Tx ring to outside of send loop

Move the check if the HW Tx ring is full to outside the send
loop. Currently it is checked for every single descriptor that we
send. Instead, tell the send loop to only process a maximum number of
packets equal to the number of available slots in the Tx ring. This
way, we can remove the check inside the send loop to and gain some
performance.

Suggested-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
4 years agoi40e: eliminate division in napi_poll data path
Magnus Karlsson [Tue, 23 Jun 2020 09:44:17 +0000 (11:44 +0200)]
i40e: eliminate division in napi_poll data path

Eliminate a division in the napi_poll data path. This division is
executed even though it is only needed in the rare case when there are
not enough interrupt lines so they have to be shared between queue
pairs. Instead, just test for this case and only execute the division
if needed. The code has been lifted from the ice driver.

Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
4 years agoi40e: optimize AF_XDP Tx completion path
Magnus Karlsson [Tue, 23 Jun 2020 09:44:16 +0000 (11:44 +0200)]
i40e: optimize AF_XDP Tx completion path

Improve the performance of the AF_XDP zero-copy Tx completion
path. When there are no XDP buffers being sent using XDP_TX or
XDP_REDIRECT, we do not have go through the SW ring to clean up any
entries since the AF_XDP path does not use these. In these cases, just
fast forward the next-to-use counter and skip going through the SW
ring. The limit on the maximum number of entries to complete is also
removed since the algorithm is now O(1). To simplify the code path, the
maximum number of entries to complete for the XDP path is therefore
also increased from 256 to 512 (the default number of Tx HW
descriptors). This should be fine since the completion in the XDP path
is faster than in the SKB path that has 256 as the maximum number.

This patch provides around 4% throughput improvement for the l2fwd
application in xdpsock on my machine.

Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Reviewed-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
4 years agoiavf: fix error return code in iavf_init_get_resources()
Wei Yongjun [Thu, 18 Jun 2020 14:19:53 +0000 (14:19 +0000)]
iavf: fix error return code in iavf_init_get_resources()

Fix to return negative error code -ENOMEM from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: b66c7bc1cd4d ("iavf: Refactor init state machine")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
4 years agoi40e: Add support for a new feature Total Port Shutdown
Arkadiusz Kubalewski [Wed, 17 Jun 2020 00:05:55 +0000 (00:05 +0000)]
i40e: Add support for a new feature Total Port Shutdown

After OS requests to down a link on a physical network port, the
traffic is no longer being processed but the physical link with
a link partner is still established.

Currently there is a feature (Link down on close) which allows
to physically bring the link down (after OS request).

With this patch new feature with similar capability is introduced:
TOTAL_PORT_SHUTDOWN
Allows to physically disable the link on the NIC's port.
If enabled, (after link down request from the OS)
no link, traffic or led activity is possible on that port.

If I40E_FLAG_TOTAL_PORT_SHUTDOWN is enabled, the
I40E_FLAG_LINK_DOWN_ON_CLOSE_ENABLED must be explicitly forced to
true and cannot be disabled at that time.
The functionalities are exclusive in terms of configuration, but
they also have similar behavior (allowing to disable physical link
of the port), with following differences:
- LINK_DOWN_ON_CLOSE_ENABLED is configurable at host OS run-time
  and is supported by whole family of 7xx Intel Ethernet Controllers
- TOTAL_PORT_SHUTDOWN may be enabled only before OS loads (in BIOS)
  only if motherboard's BIOS and NIC's FW has support of it
- when LINK_DOWN_ON_CLOSE_ENABLED is used, the link is being brought
  down by sending phy_type=0 to NIC's FW
- when TOTAL_PORT_SHUTDOWN is used, phy_type is not altered, instead
  the link is being brought down by clearing bit
  (I40E_AQ_PHY_ENABLE_LINK) in abilities field of
  i40e_aq_set_phy_config structure

Introduced changes:
- new private flag I40E_FLAG_TOTAL_PORT_SHUTDOWN for handling the
  feature
- probe of NVM if the feature was enabled at driver's port
  initialization
- special handling on link-down procedure to let FW physically
  shutdown the port if the feature was enabled

Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com>
Signed-off-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
4 years agoethernet/intel: Convert fallthrough code comments
Jeff Kirsher [Thu, 4 Jun 2020 03:07:26 +0000 (20:07 -0700)]
ethernet/intel: Convert fallthrough code comments

Convert all the remaining 'fall through" code comments to the newer
'fallthrough;' keyword.

Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
4 years agoMerge branch 'net-ethernet-use-generic-power-management'
David S. Miller [Wed, 1 Jul 2020 19:58:34 +0000 (12:58 -0700)]
Merge branch 'net-ethernet-use-generic-power-management'

Vaibhav Gupta says:

====================
net: ethernet: use generic power management

Linux Kernel Mentee: Remove Legacy Power Management.

The purpose of this patch series is to remove legacy power management callbacks
from net ethernet drivers.

The callbacks performing suspend() and resume() operations are still calling
pci_save_state(), pci_set_power_state(), etc. and handling the power management
themselves, which is not recommended.

The conversion requires the removal of the those function calls and change the
callback definition accordingly and make use of dev_pm_ops structure.

All patches are compile-tested only.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonatsemi: use generic power management
Vaibhav Gupta [Wed, 1 Jul 2020 16:50:57 +0000 (22:20 +0530)]
natsemi: use generic power management

With legacy PM, drivers themselves were responsible for managing the
device's power states and takes care of register states.

After upgrading to the generic structure, PCI core will take care of
required tasks and drivers should do only device-specific operations.

Thus, there is no need to call the PCI helper functions like
pci_enable_device, which is not recommended. Hence, removed.

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agovxge: use generic power management
Vaibhav Gupta [Wed, 1 Jul 2020 16:50:56 +0000 (22:20 +0530)]
vxge: use generic power management

With legacy PM, drivers themselves were responsible for managing the
device's power states and takes care of register states.

After upgrading to the generic structure, PCI core will take care of
required tasks and drivers should do only device-specific operations.

Use "struct dev_pm_ops" variable to bind the callbacks.

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoksz884x: use generic power management
Vaibhav Gupta [Wed, 1 Jul 2020 16:50:55 +0000 (22:20 +0530)]
ksz884x: use generic power management

With legacy PM, drivers themselves were responsible for managing the
device's power states and takes care of register states.

After upgrading to the generic structure, PCI core will take care of
required tasks and drivers should do only device-specific operations.

Thus, there is no need to call the PCI helper functions like
pci_enable_wake(), pci_save/restore_sate() and
pci_set_power_state().

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomlx4: use generic power management
Vaibhav Gupta [Wed, 1 Jul 2020 16:50:54 +0000 (22:20 +0530)]
mlx4: use generic power management

With legacy PM, drivers themselves were responsible for managing the
device's power states and takes care of register states.

After upgrading to the generic structure, PCI core will take care of
required tasks and drivers should do only device-specific operations.

Use "struct dev_pm_ops" variable to bind the callbacks.

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agobenet: use generic power management
Vaibhav Gupta [Wed, 1 Jul 2020 16:50:53 +0000 (22:20 +0530)]
benet: use generic power management

With legacy PM, drivers themselves were responsible for managing the
device's power states and takes care of register states.

After upgrading to the generic structure, PCI core will take care of
required tasks and drivers should do only device-specific operations.

Thus, there is no need to call the PCI helper functions like
pci_enable/disable_device(), pci_save/restore_sate() and
pci_set_power_state().

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosundance: use generic power management
Vaibhav Gupta [Wed, 1 Jul 2020 16:50:52 +0000 (22:20 +0530)]
sundance: use generic power management

With legacy PM, drivers themselves were responsible for managing the
device's power states and takes care of register states.

After upgrading to the generic structure, PCI core will take care of
required tasks and drivers should do only device-specific operations.

Thus, there is no need to call the PCI helper functions like
pci_enable/disable_device(), pci_save/restore_sate() and
pci_set_power_state().

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoliquidio: use generic power management
Vaibhav Gupta [Wed, 1 Jul 2020 16:50:51 +0000 (22:20 +0530)]
liquidio: use generic power management

Drivers should not use legacy power management as they have to manage power
states and related operations, for the device, themselves. This driver was
handling them with the help of PCI helper functions.

With generic PM, all essentials will be handled by the PCI core. Driver
needs to do only device-specific operations.

The driver defined empty-body .suspend() and .resume() callbacks earlier.
They can now be define NULL and bind with "struct dev_pm_ops" variable.

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoena_netdev: use generic power management
Vaibhav Gupta [Wed, 1 Jul 2020 16:50:50 +0000 (22:20 +0530)]
ena_netdev: use generic power management

With legacy PM, drivers themselves were responsible for managing the
device's power states and takes care of register states.

After upgrading to the generic structure, PCI core will take care of
required tasks and drivers should do only device-specific operations.

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agostarfire: use generic power management
Vaibhav Gupta [Wed, 1 Jul 2020 16:50:49 +0000 (22:20 +0530)]
starfire: use generic power management

With legacy PM, drivers themselves were responsible for managing the
device's power states and takes care of register states.

After upgrading to the generic structure, PCI core will take care of
required tasks and drivers should do only device-specific operations.

Thus, there is no need to call the PCI helper functions like
pci_save/restore_sate() and pci_set_power_state().

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agone2k-pci: use generic power management
Vaibhav Gupta [Wed, 1 Jul 2020 16:50:48 +0000 (22:20 +0530)]
ne2k-pci: use generic power management

With legacy PM, drivers themselves were responsible for managing the
device's power states and takes care of register states.

After upgrading to the generic structure, PCI core will take care of
required tasks and drivers should do only device-specific operations.

Thus, there is no need to call the PCI helper functions like
pci_enable/disable_device(), pci_save/restore_sate() and
pci_set_power_state().

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agotyphoon: use generic power management
Vaibhav Gupta [Wed, 1 Jul 2020 16:50:47 +0000 (22:20 +0530)]
typhoon: use generic power management

With legacy PM, drivers themselves were responsible for managing the
device's power states and takes care of register states. And they use PCI
helper functions to do it.

After upgrading to the generic structure, PCI core will take care of
required tasks and drivers should do only device-specific operations.

In this driver:
typhoon_resume() calls typhoon_wakeup() which then calls PCI helper
functions pci_set_power_state() and pci_restore_state(). The only other
function, using typhoon_wakeup() is typhoon_open().

Thus remove the pci_*() calls from tyhpoon_wakeup() and place them in
typhoon_open(), maintaining the order, to retain the normal behavior of
the function

Now, typhoon_suspend() calls typhoon_sleep() which then calls PCI helper
functions pci_enable_wake(), pci_disable_device() and
pci_set_power_state(). Other functions:
 - typhoon_open()
 - typhoon_close()
 - typhoon_init_one()
are also invoking typhoon_sleep(). Thus, in this case, cannot simply
move PCI helper functions call.

Hence, define a new function typhoon_sleep_early() which will do all the
operations, which typhoon_sleep() was doing before calling PCI helper
functions. Now typhoon_sleep() will call typhoon_sleep_early() to do
those tasks, hence, the behavior for _open(), _close and _init_one() remain
unchanged. And typhon_suspend() only requires typhoon_sleep_early().

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoqed: Make symbol 'qed_hw_err_type_descr' static
Hulk Robot [Wed, 1 Jul 2020 15:38:03 +0000 (23:38 +0800)]
qed: Make symbol 'qed_hw_err_type_descr' static

Fix sparse build warning:

drivers/net/ethernet/qlogic/qed/qed_main.c:2480:6: warning:
 symbol 'qed_hw_err_type_descr' was not declared. Should it be static?

Signed-off-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet/packet: remove redundant initialization of variable err
Colin Ian King [Wed, 1 Jul 2020 15:04:33 +0000 (16:04 +0100)]
net/packet: remove redundant initialization of variable err

The variable err is being initialized with a value that is never read
and it is being updated later with a new value.  The initialization is
redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'cxgb4-add-mirror-action-support-for-TC-MATCHALL'
David S. Miller [Wed, 1 Jul 2020 01:34:34 +0000 (18:34 -0700)]
Merge branch 'cxgb4-add-mirror-action-support-for-TC-MATCHALL'

Rahul Lakkireddy says:

====================
cxgb4: add mirror action support for TC-MATCHALL

This series of patches add support to mirror all ingress traffic
for TC-MATCHALL ingress offload.

Patch 1 adds support to dynamically create a mirror Virtual Interface
(VI) that accepts all mirror ingress traffic when mirror action is
set in TC-MATCHALL offload.

Patch 2 adds support to allocate mirror Rxqs and setup RSS for the
mirror VI.

Patch 3 adds support to replicate all the main VI configuration to
mirror VI. This includes replicating MTU, promiscuous mode,
all-multicast mode, and enabled netdev Rx feature offloads.

v3:
- Replace mirror VI refcount_t with normal u32 variable in all patches.
- Add back calling cxgb4_port_mirror_start() in cxgb_open(), which
  was there in v1, but got missed in v2 during refactoring, in patch
  3.

v2:
- Add mutex to protect all mirror VI data, instead of just
  mirror Rxqs, in patch 1 and 2.
- Remove the un-needed mirror Rxq mutex in patch 2.
- Simplify the replication code by refactoring t4_set_rxmode()
  to handle mirror VI, instead of duplicating the t4_set_rxmode()
  calls in multiple places in patch 3.
====================

Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agocxgb4: add main VI to mirror VI config replication
Rahul Lakkireddy [Tue, 30 Jun 2020 13:11:30 +0000 (18:41 +0530)]
cxgb4: add main VI to mirror VI config replication

When mirror VI is enabled, replicate various VI config params
enabled on main VI to mirror VI. These include replicating MTU,
promiscuous mode, all-multicast mode, and enabled netdev Rx
feature offloads.

v3:
- Replace mirror VI refcount_t with normal u32 variable.
- Add back calling cxgb4_port_mirror_start() in cxgb_open(), which
  was there in v1, but got missed in v2 during refactoring.

v2:
- Simplify the replication code by refactoring t4_set_rxmode()
  to handle mirror VI, instead of duplicating the t4_set_rxmode()
  calls in multiple places.

Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agocxgb4: add support for mirror Rxqs
Rahul Lakkireddy [Tue, 30 Jun 2020 13:11:29 +0000 (18:41 +0530)]
cxgb4: add support for mirror Rxqs

When mirror VI is enabled, allocate the mirror Rxqs and setup the
mirror VI RSS table. The mirror Rxqs are allocated/freed when
the mirror VI is created/destroyed or when underlying port is
brought up/down, respectively.

v3:
- Replace mirror VI refcount_t with normal u32 variable.

v2:
- Use mutex to protect all mirror VI data, instead of just
  mirror Rxqs.
- Remove the un-needed mirror Rxq mutex.

Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agocxgb4: add mirror action to TC-MATCHALL offload
Rahul Lakkireddy [Tue, 30 Jun 2020 13:11:28 +0000 (18:41 +0530)]
cxgb4: add mirror action to TC-MATCHALL offload

Add mirror Virtual Interface (VI) support to receive all ingress
mirror traffic from the underlying device. The mirror VI is
created dynamically, if the TC-MATCHALL rule has a corresponding
mirror action. Also request MSI-X vectors needed for the mirror VI
Rxqs. If no vectors are available, then disable mirror VI support.

v3:
- Replace mirror VI refcount_t with normal u32 variable.

v2:
- Add mutex to protect all mirror VI data, instead of just
  mirror Rxqs.

Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agopcnet32: Mark PM functions as __maybe_unused
Nathan Chancellor [Tue, 30 Jun 2020 21:00:34 +0000 (14:00 -0700)]
pcnet32: Mark PM functions as __maybe_unused

In certain configurations without power management support, the
following warnings happen:

../drivers/net/ethernet/amd/pcnet32.c:2928:12: warning:
'pcnet32_pm_resume' defined but not used [-Wunused-function]
 2928 | static int pcnet32_pm_resume(struct device *device_d)
      |            ^~~~~~~~~~~~~~~~~
../drivers/net/ethernet/amd/pcnet32.c:2916:12: warning:
'pcnet32_pm_suspend' defined but not used [-Wunused-function]
 2916 | static int pcnet32_pm_suspend(struct device *device_d)
      |            ^~~~~~~~~~~~~~~~~~

Mark these functions as __maybe_unused to make it clear to the compiler
that this is going to happen based on the configuration, which is the
standard for these types of functions.

Fixes: a86688fbef1b ("pcnet32: Convert to generic power management")
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoamd8111e: Mark PM functions as __maybe_unused
Nathan Chancellor [Tue, 30 Jun 2020 21:00:33 +0000 (14:00 -0700)]
amd8111e: Mark PM functions as __maybe_unused

In certain configurations without power management support, the
following warnings happen:

../drivers/net/ethernet/amd/amd8111e.c:1623:12: warning:
'amd8111e_resume' defined but not used [-Wunused-function]
 1623 | static int amd8111e_resume(struct device *dev_d)
      |            ^~~~~~~~~~~~~~~
../drivers/net/ethernet/amd/amd8111e.c:1584:12: warning:
'amd8111e_suspend' defined but not used [-Wunused-function]
 1584 | static int amd8111e_suspend(struct device *dev_d)
      |            ^~~~~~~~~~~~~~~~

Mark these functions as __maybe_unused to make it clear to the compiler
that this is going to happen based on the configuration, which is the
standard for these types of functions.

Fixes: 2caf751fe080 ("amd8111e: Convert to generic power management")
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>