The ADIN PHYs supports 4 types of reset:
1. The standard PHY reset via BMCR_RESET bit in MII_BMCR reg
2. Reset via GPIO
3. Reset via reg GeSftRst (0xff0c) & reload previous pin configs
4. Reset via reg GeSftRst (0xff0c) & request new pin configs

Resets 2, 3 & 4 are almost identical, with the exception that the crystal
oscillator is available during reset for 2.

This change implements subsystem software reset via the GeSftRst and
reloading the previous pin configuration (so reset number 3).
This will also reset the PHY core regs (similar to reset 1).

Since writing bit 1 to reg GeSftRst is self-clearing, the only thing that
can be done, is to write to that register, wait a specific amount of time
(10 milliseconds should be enough) and try to read back and check if there
are no errors on read. A busy-wait-read won't work well, and may sometimes
work or not work.

In case phylib is configured to also do a reset via GPIO, the ADIN PHY may
be reset twice when the PHY device registers, but that isn't a problem,
since it's being done on boot (or PHY device register).
Signed-off-by: NAlexandru Ardelean <alexandru.ardelean@analog.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The ADIN1200 & ADIN1300 PHYs support EEE by using standard Clause 45 access
to access MMD registers for EEE.

The EEE register addresses (when using Clause 22) are available at
different addresses (than Clause 45), and since accessing these regs (via
Clause 22) needs a special mechanism, a translation table is required to
convert these addresses.

For Clause 45, this is not needed since the driver will likely never use
this access mode.
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NAlexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The ADIN PHYs support automatic MDI/MDIX negotiation. By default this is
disabled, so this is enabled at `config_init`.

This is controlled via the PHY Control 1 register.
The supported modes are:
  1. Manual MDI
  2. Manual MDIX
  3. Auto MDIX - prefer MDIX
  4. Auto MDIX - prefer MDI

The phydev mdix & mdix_ctrl fields include modes 3 & 4 into a single
auto-mode. So, the default mode this driver enables is 4 when Auto-MDI mode
is used.

When detecting MDI/MDIX mode, a combination of the PHY Control 1 register
and PHY Status 1 register is used to determine the correct MDI/MDIX mode.

If Auto-MDI mode is not set, then the manual MDI/MDIX mode is returned.
If Auto-MDI mode is set, then MDIX mode is returned differs from the
preferred MDI/MDIX mode.
This covers all cases where:
  1. MDI preferred  & Pair01Swapped   == MDIX
  2. MDIX preferred & Pair01Swapped   == MDI
  3. MDI preferred  & ! Pair01Swapped == MDIX
  4. MDIX preferred & ! Pair01Swapped == MDI

The preferred MDI/MDIX mode is not configured via SW, but can be configured
via HW pins. Note that the `Pair01Swapped` is the Green-Yellow physical
pairs.
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NAlexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The FIFO depth can be configured for the RMII mode. This change adds
support for doing this via device-tree (or ACPI).
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NAlexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The internal delays for the RGMII are configurable for both RX & TX. This
change adds support for configuring them via device-tree (or ACPI).
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NAlexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The ADIN1300 chip supports RGMII, RMII & MII modes. Default (if
unconfigured) is RGMII.
This change adds support for configuring these modes via the device
registers.

For RGMII with internal delays (modes RGMII_ID,RGMII_TXID, RGMII_RXID),
the default delay is 2 ns. This can be configurable and will be done in
a subsequent change.
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NAlexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Both ADIN1200 & ADIN1300 support Clause 45 access for some registers.
The Extended Management Interface (EMI) registers are accessible via both
Clause 45 (at register MDIO_MMD_VEND1) and using Clause 22.

The Clause 22 access for MMD regs differs from the standard one defined by
802.3. The ADIN PHYs  use registers ExtRegPtr (0x0010) and ExtRegData
(0x0011) to access Clause 45 & EMI registers.

The indirect access is done via the following mechanism (for both R/W):
1. Write the address of the register in the ExtRegPtr
2. Read/write the value of the register via reg ExtRegData

This mechanism is needed to manage configuration of chip settings and to
access EEE registers via Clause 22.

Since Clause 45 access will likely never be used, it is not implemented via
this hook.
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NAlexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This change hooks link-status-change interrupts to phylib.
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NAlexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The chip supports standard suspend/resume via BMCR reg.
Hook these functions into the `adin` driver.
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NAlexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This change adds support for Analog Devices Industrial Ethernet PHYs.
Particularly the PHYs this driver adds support for:
 * ADIN1200 - Robust, Industrial, Low Power 10/100 Ethernet PHY
 * ADIN1300 - Robust, Industrial, Low Latency 10/100/1000 Gigabit
   Ethernet PHY

The 2 chips are register compatible with one another. The main difference
being that ADIN1200 doesn't operate in gigabit mode.

The chips can be operated by the Generic PHY driver as well via the
standard IEEE PHY registers (0x0000 - 0x000F) which are supported by the
kernel as well. This assumes that configuration of the PHY has been done
completely in HW, according to spec.

Configuration can also be done via registers, which will be supported by
this driver.

Datasheets:
  https://www.analog.com/media/en/technical-documentation/data-sheets/ADIN1300.pdf
  https://www.analog.com/media/en/technical-documentation/data-sheets/ADIN1200.pdfReviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NAlexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Antoine Tenart says:

====================
net: mscc: PTP Hardware Clock (PHC) support

This series introduces the PTP Hardware Clock (PHC) support to the Mscc
Ocelot switch driver. In order to make use of this, a new register bank
is added and described in the device tree, as well as a new interrupt.
The use this bank and interrupt was made optional in the driver for dt
compatibility reasons.

Thanks!
Antoine

Since v5:
  - Made sure both the PTP interrupt and register bank were available to
    enable supporting h/w timestamping.
  - Added a check after a kzalloc.
  - Add Reviewed-by tags from Andrew.

Since v4:
  - Added SKBTX_IN_PROGRESS.
  - Fixed two xmas trees.
  - Rework the loop condition in ocelot_ptp_rdy_irq_handler.

Since v3:
  - Fixed a spin_unlock_irqrestore issue.

Since v2:
  - Prevented from a possible infinite loop when reading the h/w
    timestamps.
  - s/GFP_KERNEL/GFP_ATOMIC/ in the Tx path.
  - Set rx_filter to HWTSTAMP_FILTER_PTP_V2_EVENT at probe.
  - Fixed s/w timestamping dependencies.
  - Added Paul Burton's Acked-by on patches 2 and 4.

Since v1:
  - Used list_for_each_safe() in ocelot_deinit().
  - Fixed a memory leak in ocelot_deinit() by calling
    dev_kfree_skb_any().
  - Fixed a locking issue in get_hwtimestamp().
  - Handled the NULL case of ptp_clock_register().
  - Added comments on optional dt properties.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch adds support for PTP Hardware Clock (PHC) to the Ocelot
switch for both PTP 1-step and 2-step modes.
Signed-off-by: NAntoine Tenart <antoine.tenart@bootlin.com>
Acked-by: NRichard Cochran <richardcochran@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In struct frame_info, the cpuq member is never used. This cosmetic patch
removes it from the structure, and from the parsing of the frame header
as it's only set but never used.
Signed-off-by: NAntoine Tenart <antoine.tenart@bootlin.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This cosmetic patch improves the frame header parsing readability by
introducing a new macro to access and mask its fields.
Signed-off-by: NAntoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch adds support for using the PTP register range, and adds a
description of its registers. This bank is used when configuring PTP.
Signed-off-by: NAntoine Tenart <antoine.tenart@bootlin.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

One additional interrupt needs to be described within the Ocelot device
tree node: the PTP ready one. This patch documents the binding needed to
do so.
Signed-off-by: NAntoine Tenart <antoine.tenart@bootlin.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

One additional register range needs to be described within the Ocelot
device tree node: the PTP. This patch documents the binding needed to do
so.
Signed-off-by: NAntoine Tenart <antoine.tenart@bootlin.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Sudarsana Reddy Kalluru says:

====================
qed*: Support for NVM config attributes.

The patch series adds support for managing the NVM config attributes.
Patch (1) adds functionality to update config attributes via MFW.
Patch (2) adds driver interface for updating the config attributes.

Changes from previous versions:
-------------------------------
v4: Added more details on the functionality and its usage.
v3: Removed unused variable.
v2: Removed unused API.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The patch adds driver interface for reading the config attributes from user
provided buffer, and updates these values on nvm config flash partition.

This is basically an expansion of our existing ethtool -f implementation.
The management FW has exposed an additional method of configuring some of
the nvram options, and this makes use of that. This implementation will
come into use when newer FW files which contain configuration directives
employing this API will be provided to ethtool -f.
Signed-off-by: NSudarsana Reddy Kalluru <skalluru@marvell.com>
Signed-off-by: NAriel Elior <aelior@marvell.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The patch adds API for configuring the NVM config attributes using
Management FW (MFW) interfaces.
Signed-off-by: NSudarsana Reddy Kalluru <skalluru@marvell.com>
Signed-off-by: NAriel Elior <aelior@marvell.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Merge tag 'linux-can-next-for-5.4-20190814' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next

Marc Kleine-Budde says:

====================
pull-request: can-next 2019-08-14

this is a pull request for net-next/master consisting of 41 patches.

The first two patches are for the kvaser_pciefd driver: Christer Beskow
removes unnecessary code in the kvaser_pciefd_pwm_stop() function,
YueHaibing removes the unused including of <linux/version.h>.

In the next patch YueHaibing also removes the unused including of
<linux/version.h> in the f81601 driver.

In the ti_hecc driver the next 6 patches are by me and fix checkpatch
warnings. YueHaibing's patch removes an unused variable in the
ti_hecc_mailbox_read() function.

The next 6 patches all target the xilinx_can driver. Anssi Hannula's
patch fixes a chip start failure with an invalid bus. The patch by
Venkatesh Yadav Abbarapu skips an error message in case of a deferred
probe. The 3 patches by Appana Durga Kedareswara rao fix the RX and TX
path for CAN-FD frames. Srinivas Neeli's patch fixes the bit timing
calculations for CAN-FD.

The next 12 patches are by me and several checkpatch warnings in the
af_can, raw and bcm components.

Thomas Gleixner provides a patch for the bcm, which switches the timer
to HRTIMER_MODE_SOFT and removes the hrtimer_tasklet.

Then 6 more patches by me for the gw component, which fix checkpatch
warnings, followed by 2 patches by Oliver Hartkopp to add CAN-FD
support.

The vcan driver gets 3 patches by me, fixing checkpatch warnings.

And finally a patch by Andre Hartmann to fix typos in CAN's netlink
header.
====================

__page_pool_get_cached() will return NULL when the ring is
empty, even if there are pages present in the lookaside cache.

It is also possible to refill the cache, and then return a
NULL page.

Restructure the logic so eliminate both cases.
Signed-off-by: NJonathan Lemon <jonathan.lemon@gmail.com>
Acked-by: NJesper Dangaard Brouer <brouer@redhat.com>
Acked-by: NIlias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Gerd Rausch says:

====================
net/rds: Fixes from internal Oracle repo

This is the first set of (mostly old) patches from our internal repository
in an effort to synchronize what Oracle had been using internally
with what is shipped with the Linux kernel.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Original commit from 2011 updated to include a change by
Yuval Shaia <yuval.shaia@oracle.com>
that adds a new statistic counter "send_stuck_rm"
to capture the messages looping exessively
in the send path.
Signed-off-by: NGerd Rausch <gerd.rausch@oracle.com>
Acked-by: NSantosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In a previous commit, fields were added to "struct rds_statistics"
but array "rds_stat_names" was not updated accordingly.

Please note the inconsistent naming of the string representations
that is done in the name of compatibility
with the Oracle internal code-base.

s_recv_bytes_added_to_socket     -> "recv_bytes_added_to_sock"
s_recv_bytes_removed_from_socket -> "recv_bytes_freed_fromsock"

Fixes: 192a798f ("RDS: add stat for socket recv memory usage")
Signed-off-by: NGerd Rausch <gerd.rausch@oracle.com>
Acked-by: NSantosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NChris Mason <chris.mason@oracle.com>
Signed-off-by: NBang Nguyen <bang.nguyen@oracle.com>
Signed-off-by: NGerd Rausch <gerd.rausch@oracle.com>
Signed-off-by: NSomasundaram Krishnasamy <somasundaram.krishnasamy@oracle.com>
Acked-by: NSantosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This will kick the RDS worker thread if we have been looping
too long.

Original commit from 2012 updated to include a change by
Venkat Venkatsubra <venkat.x.venkatsubra@oracle.com>
that triggers "must_wake" if "rds_ib_recv_refill_one" fails.
Signed-off-by: NGerd Rausch <gerd.rausch@oracle.com>
Acked-by: NSantosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Jiri Pirko says:

====================
netdevsim: implement support for devlink region and snapshots

Implement devlink region support for netdevsim and test it.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Test netdevsim devlink region implementation.
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Tested-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Implement dummy region of size 32K and allow user to create snapshots
or random data using debugfs file trigger.
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Reviewed-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Jiri Pirko says:

====================
selftests: netdevsim: add devlink paramstests

The first patch is just a helper addition as a dependency of the actual
test in patch number two.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Test recently added netdevsim devlink param implementation.
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Tested-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Push the jq return value workaround code into a separate helper so it
could be used by the rest of the code.
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Remove variable initializations in functions that
are followed by assignments before use
Signed-off-by: NYunsheng Lin <linyunsheng@huawei.com>
Acked-by: NJesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Sync EEE init for RTL8168h with vendor driver and add two writes to
vendor-specific registers.
Signed-off-by: NHeiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Heiner Kallweit says:

====================
net: phy: realtek: map vendor-specific EEE registers to standard MMD registers

EEE-related registers on newer integrated PHY's have the standard
layout, but are accessible not via MMD but via vendor-specific
registers. Emulating the standard MMD registers allows to use the
generic functions for EEE control and to significantly simplify
the r8169 driver.

v2:
- rebase patch 2
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Now that the Realtek PHY driver maps the vendor-specific EEE registers
to the standard MMD registers, we can remove all special handling and
use the generic functions phy_ethtool_get/set_eee.
Signed-off-by: NHeiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

EEE-related registers on newer integrated PHY's have the standard
layout, but are accessible not via MMD but via vendor-specific
registers. Emulating the standard MMD registers allows to use the
generic functions for EEE control.
Signed-off-by: NHeiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When the genphy driver binds to a swphy it will call
genphy_read_abilites that will try to read MII_ESTATUS if BMSR_ESTATEN
is set in MII_BMSR. So far this would read the default value 0xffff
and 1000FD and 1000HD are reported as supported just by chance.
Better add explicit support for emulating MII_ESTATUS.
Signed-off-by: NHeiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Value of MII_CTRL1000 is needed only if LPA_1000MSFAIL is set.
Therefore move reading this register.
Signed-off-by: NHeiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>