Enhancing driver to accept max supported queues for ethtool --set-channels
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Moved common function setup_glists to lio_core.c
and reamed it to lio_setup_glists
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Moving common definition octnic_gather to octeon_network.h
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Moved common function delete_glists to lio_core.c
and renamed it to lio_delete_glists
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Moved common function list_delete_head to octeon_network.h
and renamed it to lio_list_delete_head
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Moved common function if_cfg_callback to lio_core.c
and renamed it to lio_if_cfg_callback.
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The code in the fallback path has supported XDP in conjunction with the Tx
traffic classification for TCs for over a year now. So instead of just
calling skb_tx_hash for every packet we are better off using the fallback
since that will record the Tx queue to the socket and then that can be used
instead of having to recompute the hash every time.
Signed-off-by: NAlexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch is meant to clean up how the opa_vnic is obtaining entropy from
Tx packets.

The code as it was written was claiming to get 16 bits of hash, but from
what I can tell it was only ever actually getting 14 bits as it was limited
to 0 - (2^15 - 1). It then was folding the result to get a 8 bit value for
entropy.

Instead of throwing away all that input I am cutting out the middle man and
instead having the code call skb_get_hash directly and then folding the 32
bit value into a 8 bit value using a pair of shifts and XOR operations.

Execution wise this new approach should provide more entropy and be faster
since we are bypassing the reciprocal multiplication to reduce the 32b
value to 16b and instead just using a shift/XOR combination.

In addition we can drop the unneeded adapter value from the call to get the
entropy since the netdev itself isn't even needed.
Signed-off-by: NAlexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Modify the error messages when phy registration fails.
Signed-off-by: NRaghuram Chary J <raghuramchary.jallipalli@microchip.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Remove driver version info from the lan78xx driver.
Signed-off-by: NRaghuram Chary J <raghuramchary.jallipalli@microchip.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Adding Fixed PHY support to the lan78xx driver.
Signed-off-by: NRaghuram Chary J <raghuramchary.jallipalli@microchip.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The remaining values written to the Switch Management Register in the
mv88e6xxx_g2_setup function are specific to 88E6352 and older, and are
the default values anyway.

Thus remove completely this function. The mv88e6xxx driver no more
contains setup code to access arbitrary Global 2 registers.
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Move the Device Mapping setup out of the specific Global 2 code,
into the top level device setup function.
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Move the trunking setup out of Global 2 specific setup into the top
level mv88e6xxx_setup function.

Note that the 88E6390 family calls this LAG instead of Trunk and
supports 32 possible ID routing vectors, with LAG ID bit 4 being placed
in Global 2 register 0x1D...

We don't need Trunk (or LAG) IDs for the moment, thus keep it simple.
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

After commit c59530d0 ("net: Move PHY statistics code into PHY
library helpers") we made net/core/ethtool.c reference symbols which are
part of the library which can be modular. David introduced a temporary
fix with 1ecd6e8a ("phy: Temporary build fix after phylib changes.")
which would prevent such modularity.

This is not desireable of course, so instead, just inline the functions
into include/linux/phy.h to keep both options available.

Fixes: c59530d0 ("net: Move PHY statistics code into PHY library helpers")
Fixes: 1ecd6e8a ("phy: Temporary build fix after phylib changes.")
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

U64_MAX is well defined now while the UINT64_MAX is not, so we fall
back to drivers' own definition as below:

	#ifndef UINT64_MAX
	#define UINT64_MAX             (u64)(~((u64)0))
	#endif

I believe this is in one phy driver then copied and pasted to other phy
drivers.

Replace the UINT64_MAX with U64_MAX to clean up the source code.
Signed-off-by: NJisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

use ns_to_timespec64() and timespec64_to_ns() instead of open coding
Signed-off-by: NYueHaibing <yuehaibing@huawei.com>
Acked-by: NRichard Cochran <richardcochran@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add logic to reserve default rings at driver open time if none was
reserved during probe time.  This will happen when the PF driver did
not provision minimum rings to the VF, due to more limited resources.

Driver open will only succeed if some minimum rings can be reserved.
Signed-off-by: NMichael Chan <michael.chan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

For completeness and correctness, the VF driver needs to reserve these
RSS and L2 contexts.
Signed-off-by: NMichael Chan <michael.chan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When rings are more limited and the PF has not provisioned minimum
guaranteed rings to the VF, do not reserve rings during driver probe.
Wait till device open before reserving rings when they will be used.
Device open will succeed if some minimum rings can be successfully
reserved and allocated.
Signed-off-by: NMichael Chan <michael.chan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The current code does not reserve rings during ethtool -L when the device
is down.  The rings will be reserved when the device is later opened.

Change it to reserve rings during ethtool -L when the device is down.
This provides a better guarantee that the device open will be successful
when the rings are reserved ahead of time.
Signed-off-by: NMichael Chan <michael.chan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This adds debugfs support for bnxt_en with the purpose of allowing users
to examine the current DIM profile in use for each receive queue.  This
was instrumental in debugging issues found with DIM and ensuring that
the profiles we expect to use are the profiles being used.
Signed-off-by: NAndy Gospodarek <gospo@broadcom.com>
Signed-off-by: NMichael Chan <michael.chan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Testing with DIM enabled on older kernels indicated that firmware calls
were slower than expected.  More detailed analysis indicated that the
default 25us delay was higher than necessary.  Reducing the time spend in
usleep_range() for the first several calls would reduce the overall
latency of firmware calls on newer Intel processors.
Signed-off-by: NAndy Gospodarek <gospo@broadcom.com>
Signed-off-by: NMichael Chan <michael.chan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This keeps the RING_IDLE flag set in hardware for higher coalesce
settings by default and improved latency.
Signed-off-by: NAndy Gospodarek <gospo@broadcom.com>
Signed-off-by: NMichael Chan <michael.chan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Firmware does not allow the operation and would return failure, causing
a warning in dmesg.  So check for VF and disallow it in the driver.
Signed-off-by: NMichael Chan <michael.chan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add counters to display sum of rx/tx_discard_pkts of all rings as
function level statistics via ethtool.
Signed-off-by: NVasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: NMichael Chan <michael.chan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Replace switch statements printing different messages for every ring type
with a common message.
Signed-off-by: NMichael Chan <michael.chan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Older firmware will reject this call and cause an error message to
be printed by the VF driver.
Signed-off-by: NMichael Chan <michael.chan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Firmware messages that are forwarded from PF to VFs are encapsulated.
The size of these encapsulated messages must not exceed the maximum
defined message size.  Add appropriate checks to avoid oversize
messages.  Firmware messages may be expanded in future specs and
this will provide some guardrails to avoid data corruption.
Signed-off-by: NMichael Chan <michael.chan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Initially, the MQPRIO TCs are mapped 1:1 directly to the hardware
queues.  Some of these hardware queues are configured to be lossless.
When PFC is enabled on one of more TCs, we now need to remap the
TCs that have PFC enabled to the lossless hardware queues.

After remapping, we need to close and open the NIC for the new
mapping to take effect.  We also need to reprogram all ETS parameters.
Signed-off-by: NMichael Chan <michael.chan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The current driver maps MQPRIO traffic classes directly 1:1 to the
internal hardware queues (TC0 maps to hardware queue 0, etc).  This
direct mapping requires the internal hardware queues to be reconfigured
from lossless to lossy and vice versa when necessary.  This
involves reconfiguring internal buffer thresholds which is
disruptive and not always reliable.

Implement a new scheme to map TCs to internal hardware queues by
matching up their PFC requirements.  This will eliminate the need
to reconfigure a hardware queue internal buffers at run time.  After
remapping, the NIC is closed and opened for the new TC to hardware
queues to take effect.

This patch only adds the basic mapping logic.
Signed-off-by: NMichael Chan <michael.chan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The calls up from the napi poll reading the receive ring had many
places where an argument was being recreated. I.e the caller already
had the value and wasn't passing it, then the callee would use
known relationship to determine the same value. Simpler and faster
to just pass arguments needed.

Also, add const in a couple places where message is being only read.
Signed-off-by: NStephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

After many years of having a ~30 line copyright and license header to our
source files, we are finally able to reduce that to one line with the
advent of the SPDX identifier.

Also caught a few files missing the SPDX license identifier, so fixed
them up.
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: NShannon Nelson <shannon.nelson@oracle.com>
Acked-by: NRichard Cochran <richardcochran@gmail.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Commit c40e89fd ("geneve: configure MTU based on a lower device") added
an IS_ENABLED(CONFIG_IPV6) to geneve, leading to the following link error
with CONFIG_GENEVE=y and CONFIG_IPV6=m:

drivers/net/geneve.o: In function `geneve_link_config':
geneve.c:(.text+0x14c): undefined reference to `rt6_lookup'

Fix this by adding a Kconfig dependency and forcing GENEVE to be a module
when IPV6 is a module.

Fixes: c40e89fd ("geneve: configure MTU based on a lower device")
Signed-off-by: NTobias Regnery <tobias.regnery@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

If READ MAC fails to fetch a valid MAC address, allow some more device
types (IQD and z/VM OSD) to fall back to a random address.
Also use eth_hw_addr_random(), for indicating to userspace that the
address type is NET_ADDR_RANDOM.

Note that while z/VM has various protection schemes to prohibit
custom addresses on its NICs, they are all optional. So we should at
least give it a try.
Signed-off-by: NJulian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Check if a qeth device supports IPv6 RX checksum offload, and hook it up
into the existing NETIF_F_RXCSUM support.
As NETIF_F_RXCSUM is now backed by a combination of HW Assists, we need
to be a little smarter when dealing with errors during a configuration
change:
- switching on NETIF_F_RXCSUM only makes sense if at least one HW Assist
  was enabled successfully.
- for switching off NETIF_F_RXCSUM, all available HW Assists need to be
  deactivated.
Signed-off-by: NKittipon Meesompop <kmeesomp@linux.vnet.ibm.com>
Signed-off-by: NJulian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Check if a qeth device supports IPv6 TX checksum offload, and advertise
NETIF_F_IPV6_CSUM accordingly. Add support for setting the relevant bits
in IPv6 packet descriptors.

Currently this has only limited use (ie. UDP, or Jumbo Frames). For any
TCP traffic with a standard MSS, the TCP checksum gets calculated
as part of the linear GSO segmentation.
Signed-off-by: NKittipon Meesompop <kmeesomp@linux.vnet.ibm.com>
Signed-off-by: NJulian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add some wrappers to make the protocol-specific Assist code a little
more generic, and use them for sending protocol-agnostic commands in
the Checksum Offload Assist code.
Signed-off-by: NKittipon Meesompop <kmeesomp@linux.vnet.ibm.com>
Signed-off-by: NJulian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

For new functionality, the L2 subdriver will start using IPv6 assists.
So move the query from the L3 subdriver into the common setup path.
Signed-off-by: NKittipon Meesompop <kmeesomp@linux.vnet.ibm.com>
Signed-off-by: NJulian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This matches the statistics we gather for the TX offload path.
Signed-off-by: NKittipon Meesompop <kmeesomp@linux.vnet.ibm.com>
Signed-off-by: NJulian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>