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>

staging: octeon: delete driver

This driver has been in the tree since 2009 with no real movement to get
it out. Now it is starting to cause build issues and other problems for
people who want to fix coding style problems, but can not actually build
it.

As nothing is happening here, just delete the module entirely.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Cc: David Daney <ddaney@caviumnetworks.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: YueHaibing <yuehaibing@huawei.com>
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Wambui Karuga <wambui.karugax@gmail.com>
Cc: Julia Lawall <julia.lawall@lip6.fr>
Cc: Florian Westphal <fw@strlen.de>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Branden Bonaby <brandonbonaby94@gmail.com>
Cc: "Petr Štetiar" <ynezz@true.cz>
Cc: Sandro Volery <sandro@volery.com>
Cc: Paul Burton <paulburton@kernel.org>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Giovanni Gherdovich <bobdc9664@seznam.cz>
Cc: Valery Ivanov <ivalery111@gmail.com>
Link: https://lore.kernel.org/r/20191210091509.3546251-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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>

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>

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>

staging: octeon-ethernet: drop poll_now parameter from cvm_oct_common_open

Drop redundant poll_now parameter from cvm_oct_common_open.

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

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>

staging: octeon-ethernet: sgmii/xaui: make link poll generic

Make link poll generic to avoid copy paste.

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

staging: octeon-ethernet: consolidate carrier notifications

Always use cvm_oct_note_carrier() to avoid copy-pasted code.

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

staging: octeon-ethernet: delete sgmii and xaui specific uninit functions

Delete redundant wrappers.

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

staging: octeon-ethernet: move ndo_stop to common init

All init functions call ndo_stop if it's defined, so move it
to common function.

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

staging: octeon-ethernet: consolidate ndo_stop functions

All ndo_stop functions are identical. Get rid of duplicated code.

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

staging: octeon-ethernet: consolidate ndo_open functions

ndo_open for rgmii, sgmii and xaui are almost identical. Put the common
code in a single function.

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

Staging: octeon: Missing a blank line after declarations

Fix checkpatch.pl issues with missing a blank
line after declarations in ethernet-sgmii.c

Signed-off-by: Aybuke Ozdemir <aybuke.147@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: octeon-ethernet: Move PHY activation to .ndo_open().

This prevents PHY not found types of errors for PHY drivers that are
probed after the Ethernet driver is probed, because the ifconfig UP is
done from userspace after all drivers have been probed.

Also avoid the cvmx-helper-board.c PHY code if a real PHY driver is
present, this allows a bootloader supplied device tree to specify the
PHY information rather than having to modify the code for each
different board.

Tested-by: Alex Smith <alex.smith@imgtec.com>
Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Alex Smith <alex.smith@imgtec.com>
Cc: devel@driverdev.osuosl.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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>

staging: octeon: use printk_ratelimited instead of printk_ratelimit

As per printk_ratelimit comment, it should not be used

Signed-off-by: Christian Dietrich <christian.dietrich@informatik.uni-erlangen.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

Staging: octeon: remove unneeded includes

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
To: netdev@vger.kernel.org
To: gregkh@suse.de
Patchwork: http://patchwork.linux-mips.org/patch/964/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Staging: octeon-ethernet: Convert to use PHY Abstraction Layer.

The octeon-ethernet driver shares an mdio bus with the octeon-mgmt
driver. Here we convert the octeon-ethernet driver to use the PHY
Abstraction Layer.

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

Staging: octeon-ethernet: Convert to use net_device_ops.

Convert the driver to use net_device_ops as it is now mandatory.

Also compensate for the removal of struct sk_buff's dst field.

The changes are mostly mechanical, the content of ethernet-common.c
was moved to ethernet.c and ethernet-common.{c,h} are removed.

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

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>