staging: octeon: Indent with tabs instead of spaces

Remove a coding style error. It makes code more readable.

Signed-off-by: Muhammad Usama Anjum <musamaanjum@gmail.com>
Link: https://lore.kernel.o

staging: octeon: Indent with tabs instead of spaces

Remove a coding style error. It makes code more readable.

Signed-off-by: Muhammad Usama Anjum <musamaanjum@gmail.com>
Link: https://lore.kernel.org/r/20200723132123.GA26221@musamaanjum
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Revert "staging: octeon: delete driver"

This reverts commit 710d7fbe21ee2ceab121f1f84a20edf68f9f9742.
Re-instate the code so subsequent commits can clean it up and get it
building properly.

Signed-

Revert "staging: octeon: delete driver"

This reverts commit 710d7fbe21ee2ceab121f1f84a20edf68f9f9742.
Re-instate the code so subsequent commits can clean it up and get it
building properly.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Link: https://lore.kernel.org/r/20200205001116.14096-3-chris.packham@alliedtelesis.co.nz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging/octeon: Allow test build on !MIPS

Add compile test support by moving all includes of files under
asm/octeon into octeon-ethernet.h, and if we're not on MIPS,
stub out all the calls into the

staging/octeon: Allow test build on !MIPS

Add compile test support by moving all includes of files under
asm/octeon into octeon-ethernet.h, and if we're not on MIPS,
stub out all the calls into the octeon support code in octeon-stubs.h

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

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staging: octeon: remove redundant license text

Now that the SPDX tag is in all drivers/staging/octeon/ files, that
identifies the license in a specific and legally-defined manner. So the
extra GPL

staging: octeon: remove redundant license text

Now that the SPDX tag is in all drivers/staging/octeon/ files, that
identifies the license in a specific and legally-defined manner. So the
extra GPL text wording can be removed as it is no longer needed at all.

This is done on a quest to remove the 700+ different ways that files in
the kernel describe the GPL license text. And there's unneeded stuff
like the address (sometimes incorrect) for the FSF which is never
needed.

No copyright headers or other non-license-description text was removed.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: octeon: add SPDX identifiers.

It's good to have SPDX identifiers in all files to make it easier to
audit the kernel tree for correct licenses.

Fix up the staging octeon driver to have a pr

staging: octeon: add SPDX identifiers.

It's good to have SPDX identifiers in all files to make it easier to
audit the kernel tree for correct licenses.

Fix up the staging octeon driver to have a proper SPDX identifier, based
on the license text in the file itself. The SPDX identifier is a
legally binding shorthand, which can be used instead of the full boiler
plate text.

This work is based on a script and data from Thomas Gleixner, Philippe
Ombredanne, and Kate Stewart.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: octeon: Add space around '+'

Add space around operator '+'. Problem found using
checkpatch.pl
CHECK: spaces preferred around that '+' (ctx:VxV)

Signed-off-by: Burcin Akalin <brcnakalin@gma

staging: octeon: Add space around '+'

Add space around operator '+'. Problem found using
checkpatch.pl
CHECK: spaces preferred around that '+' (ctx:VxV)

Signed-off-by: Burcin Akalin <brcnakalin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: octeon: Do not use multiple blank lines.

Remove multiple blank lines. Problem found using checkpatch.pl
"CHECK: Please don't use multiple blank lines".

Signed-off-by: Burcin Akalin <brcnak

staging: octeon: Do not use multiple blank lines.

Remove multiple blank lines. Problem found using checkpatch.pl
"CHECK: Please don't use multiple blank lines".

Signed-off-by: Burcin Akalin <brcnakalin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Staging: octeon: Use preferred kernel type

This patch "uint*_t" type instead of "u*" type was used.
checkpatch.pl issue in octeon driver.

Signed-off-by: Aybuke Ozdemir <aybuke.147@gmail.com>
Review

Staging: octeon: Use preferred kernel type

This patch "uint*_t" type instead of "u*" type was used.
checkpatch.pl issue in octeon driver.

Signed-off-by: Aybuke Ozdemir <aybuke.147@gmail.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: octeon-ethernet: update boilerplate comments

Update boilerplate comments to be more terse by removing
redundant information.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-

staging: octeon-ethernet: update boilerplate comments

Update boilerplate comments to be more terse by removing
redundant information.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: octeon-ethernet: eliminate OCTEON_ETHERNET_VERSION

This driver has drifted away from out-of-tree versions years ago
and the version string does not provide any useful information.
Instead p

staging: octeon-ethernet: eliminate OCTEON_ETHERNET_VERSION

This driver has drifted away from out-of-tree versions years ago
and the version string does not provide any useful information.
Instead provide the kernel version string to ethtool, so that we get
useful version information e.g. for bug reports.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: octeon-ethernet: eliminate DONT_WRITEBACK

This feature is not used so eliminate it.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfound

staging: octeon-ethernet: eliminate DONT_WRITEBACK

This feature is not used so eliminate it.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: octeon-ethernet: eliminate USE_RED define

We have RED always enabled, so eliminate the #define.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregk

staging: octeon-ethernet: eliminate USE_RED define

We have RED always enabled, so eliminate the #define.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: octeon-ethernet: eliminate USE_SKBUFFS_IN_HW define

We always try to use skbuffs for packet buffers, so eliminate
a redundant define.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Si

staging: octeon-ethernet: eliminate USE_SKBUFFS_IN_HW define

We always try to use skbuffs for packet buffers, so eliminate
a redundant define.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: octeon-ethernet: eliminate USE_HW_TCPUDP_CHECKSUM define

HW checksum is always enabled, so delete a redundant define.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Gre

staging: octeon-ethernet: eliminate USE_HW_TCPUDP_CHECKSUM define

HW checksum is always enabled, so delete a redundant define.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: octeon-ethernet: eliminate USE_10MBPS_PREAMBLE_WORKAROUND define

We have the workaround always enabled, so eliminate a redundant #define.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi

staging: octeon-ethernet: eliminate USE_10MBPS_PREAMBLE_WORKAROUND define

We have the workaround always enabled, so eliminate a redundant #define.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: octeon-ethernet: delete references to CONFIG_CAVIUM_RESERVE32

Delete references to CONFIG_CAVIUM_RESERVE32. Kernel does not have such
option and the driver does not use it for anything.

Si

staging: octeon-ethernet: delete references to CONFIG_CAVIUM_RESERVE32

Delete references to CONFIG_CAVIUM_RESERVE32. Kernel does not have such
option and the driver does not use it for anything.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: octeon-ethernet: drop CONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS

We don't have such Kconfig option, so the current code is dead and
the documentation is wrong. Users can adjust this setting by

staging: octeon-ethernet: drop CONFIG_CAVIUM_OCTEON_NUM_PACKET_BUFFERS

We don't have such Kconfig option, so the current code is dead and
the documentation is wrong. Users can adjust this setting by using
module parameter or kernel command line, so we can delete this code.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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MIPS: Octeon: Move some Ethernet support files out of staging.

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: netdev@vger.kernel.org
Cc: devel@driverdev.osuosl

MIPS: Octeon: Move some Ethernet support files out of staging.

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: netdev@vger.kernel.org
Cc: devel@driverdev.osuosl.org
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Patchwork: https://patchwork.linux-mips.org/patch/2942/
Patchwork: https://patchwork.linux-mips.org/patch/3012/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

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Staging: Octeon: Free transmit SKBs in a timely manner

If we wait for the once-per-second cleanup to free transmit SKBs,
sockets with small transmit buffer sizes might spend most of their
time bloc

Staging: Octeon: Free transmit SKBs in a timely manner

If we wait for the once-per-second cleanup to free transmit SKBs,
sockets with small transmit buffer sizes might spend most of their
time blocked waiting for the cleanup.

Normally we do a cleanup for each transmitted packet. We add a
watchdog type timer so that we also schedule a timeout for 150uS after
a packet is transmitted. The watchdog is reset for each transmitted
packet, so for high packet rates, it never expires. At these high
rates, the cleanups are done for each packet so the extra watchdog
initiated cleanups are neither needed nor triggered.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
To: netdev@vger.kernel.org
To: gregkh@suse.de
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Patchwork: http://patchwork.linux-mips.org/patch/968/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

This version has spelling and comment changes based on feedback from
Eric Dumazet.

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Staging: Octeon Ethernet: Use constants from in.h

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
To: gregkh@suse.de
Patchwork: http://patchwork.linux-mips.org/p

Staging: Octeon Ethernet: Use constants from in.h

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
To: gregkh@suse.de
Patchwork: http://patchwork.linux-mips.org/patch/837/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

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Staging: Octeon Ethernet: Convert to NAPI.

Convert the driver to be a reasonably well behaved NAPI citizen.

There is one NAPI instance per CPU shared between all input ports. As
receive backlog in

Staging: Octeon Ethernet: Convert to NAPI.

Convert the driver to be a reasonably well behaved NAPI citizen.

There is one NAPI instance per CPU shared between all input ports. As
receive backlog increases, NAPI is scheduled on additional CPUs.

Receive buffer refill code factored out so it can also be called from
the periodic timer. This is needed to recover from temporary buffer
starvation conditions.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
To: gregkh@suse.de
Patchwork: http://patchwork.linux-mips.org/patch/839/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

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Staging: Octeon Ethernet: Remove unused code.

Remove unused code, reindent, and join some spilt strings.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
To: gre

Staging: Octeon Ethernet: Remove unused code.

Remove unused code, reindent, and join some spilt strings.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
To: gregkh@suse.de
Patchwork: http://patchwork.linux-mips.org/patch/842/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

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Staging: octeon-ethernet: Fix race freeing transmit buffers.

The existing code had the following race:

Thread-1 Thread-2

inc/read in_use
inc/re

Staging: octeon-ethernet: Fix race freeing transmit buffers.

The existing code had the following race:

Thread-1 Thread-2

inc/read in_use
inc/read in_use
inc tx_free_list[qos].len
inc tx_free_list[qos].len

The actual in_use value was incremented twice, but thread-1 is going
to free memory based on its stale value, and will free one too many
times. The result is that memory is freed back to the kernel while
its packet is still in the transmit buffer. If the memory is
overwritten before it is transmitted, the hardware will put a valid
checksum on it and send it out (just like it does with good packets).
If by chance the TCP flags are clobbered but not the addresses or
ports, the result can be a broken TCP stream.

The fix is to track the number of freed packets in a single location
(a Fetch-and-Add Unit register). That way it can never get out of sync
with itself.

We try to free up to MAX_SKB_TO_FREE (currently 10) buffers at a time.
If fewer are available we adjust the free count with the difference.
The action of claiming buffers to free is atomic so two threads cannot
claim the same buffers.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

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Staging: Add octeon-ethernet driver files.

The octeon-ethernet driver supports the sgmii, rgmii, spi, and xaui
ports present on the Cavium OCTEON family of SOCs. These SOCs are
multi-core mips64 pr

Staging: Add octeon-ethernet driver files.

The octeon-ethernet driver supports the sgmii, rgmii, spi, and xaui
ports present on the Cavium OCTEON family of SOCs. These SOCs are
multi-core mips64 processors with existing support over in arch/mips.

The driver files can be categorized into three basic groups:

1) Register definitions, these are named cvmx-*-defs.h

2) Main driver code, these have names that don't start cvmx-.

3) Interface specific functions and other utility code, names starting
with cvmx-

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

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staging: octeon: Indent with tabs instead of spaces

Remove a coding style error. It makes code more readable.

Signed-off-by: Muhammad Usama Anjum <musamaanjum@gmail.com>
Link: h

staging: octeon: Indent with tabs instead of spaces

Remove a coding style error. It makes code more readable.

Signed-off-by: Muhammad Usama Anjum <musamaanjum@gmail.com>
Link: https://lore.kernel.org/r/20200723132123.GA26221@musamaanjum
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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