net: ti: icssg-prueth: add dependency for PTP

When CONFIG_PTP_1588_CLOCK=m and CONFIG_TI_ICSSG_PRUETH=y, there are
kconfig dependency warnings and build errors referencing PTP functions.

Fix these by making TI_ICSSG_PRUETH depend on PTP_1588_CLOCK_OPTIONAL.

Fixes these build errors and warnings:

WARNING: unmet direct dependencies detected for TI_ICSS_IEP
Depends on [m]: NETDEVICES [=y] && ETHERNET [=y] && NET_VENDOR_TI [=y] && PTP_1588_CLOCK_OPTIONAL [=m] && TI_PRUSS [=y]
Selected by [y]:
- TI_ICSSG_PRUETH [=y] && NETDEVICES [=y] && ETHERNET [=y] && NET_VENDOR_TI [=y] && PRU_REMOTEPROC [=y] && ARCH_K3 [=y] && OF [=y] && TI_K3_UDMA_GLUE_LAYER [=y]

aarch64-linux-ld: drivers/net/ethernet/ti/icssg/icss_iep.o: in function `icss_iep_get_ptp_clock_idx':
icss_iep.c:(.text+0x1d4): undefined reference to `ptp_clock_index'
aarch64-linux-ld: drivers/net/ethernet/ti/icssg/icss_iep.o: in function `icss_iep_exit':
icss_iep.c:(.text+0xde8): undefined reference to `ptp_clock_unregister'
aarch64-linux-ld: drivers/net/ethernet/ti/icssg/icss_iep.o: in function `icss_iep_init':
icss_iep.c:(.text+0x176c): undefined reference to `ptp_clock_register'

Fixes: 186734c15886 ("net: ti: icssg-prueth: add packet timestamping and ptp support")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Roger Quadros <rogerq@ti.com>
Cc: Md Danish Anwar <danishanwar@ti.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: netdev@vger.kernel.org
Reviewed-by: MD Danish Anwar <danishanwar@ti.com>
Link: https://lore.kernel.org/r/20240211061152.14696-1-rdunlap@infradead.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

net: ethernet: ti: am65-cpsw-qos: Add Frame Preemption MAC Merge support

Add driver support for viewing / changing the MAC Merge sublayer
parameters and seeing the verification state machine's current state
via ethtool.

As hardware does not support interrupt notification for verification
events we resort to polling on link up. On link up we try a couple of
times for verification success and if unsuccessful then give up.

The Frame Preemption feature is described in the Technical Reference
Manual [1] in section:
12.3.1.4.6.7 Intersperced Express Traffic (IET – P802.3br/D2.0)

Due to Silicon Errata i2208 [2] we set limit min IET fragment size to
124 (excluding 4 bytes mCRC).

[1] AM62x TRM - https://www.ti.com/lit/ug/spruiv7a/spruiv7a.pdf
[2] AM62x Silicon Errata - https://www.ti.com/lit/er/sprz487c/sprz487c.pdf

Signed-off-by: Roger Quadros <rogerq@kernel.org>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ethernet: ti: am65-cpsw: add mqprio qdisc offload in channel mode

This patch adds MQPRIO Qdisc offload in full 'channel' mode which allows
not only setting up pri:tc mapping, but also configuring TX shapers
(rate-limiting) on external port FIFOs.

The MQPRIO Qdisc offload is expected to work with or without VLAN/priority
tagged packets.

The CPSW external Port FIFO has 8 Priority queues. The rate-limit can be
set for each of these priority queues. Which Priority queue a packet is
assigned to depends on PN_REG_TX_PRI_MAP register which maps header
priority to switch priority.

The header priority of a packet is assigned via the RX_PRI_MAP_REG which
maps packet priority to header priority.

The packet priority is either the VLAN priority (for VLAN tagged packets)
or the thread/channel offset.

For simplicity, we assign the same priority queue to all queues of a
Traffic Class so it can be rate-limited correctly.

Configuration example:
ethtool -L eth1 tx 5
ethtool --set-priv-flags eth1 p0-rx-ptype-rrobin off

tc qdisc add dev eth1 parent root handle 100: mqprio num_tc 3 \
map 0 0 1 2 0 0 0 0 0 0 0 0 0 0 0 0 \
queues 1@0 1@1 1@2 hw 1 mode channel \
shaper bw_rlimit min_rate 0 100mbit 200mbit max_rate 0 101mbit 202mbit

tc qdisc replace dev eth2 handle 100: parent root mqprio num_tc 1 \
map 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 queues 1@0 hw 1

ip link add link eth1 name eth1.100 type vlan id 100
ip link set eth1.100 type vlan egress 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7

In the above example two ports share the same TX CPPI queue 0 for low
priority traffic. 3 traffic classes are defined for eth1 and mapped to:
TC0 - low priority, TX CPPI queue 0 -> ext Port 1 fifo0, no rate limit
TC1 - prio 2, TX CPPI queue 1 -> ext Port 1 fifo1, CIR=100Mbit/s, EIR=1Mbit/s
TC2 - prio 3, TX CPPI queue 2 -> ext Port 1 fifo2, CIR=200Mbit/s, EIR=2Mbit/s

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ethernet: am65-cpsw: Rename TI_AM65_CPSW_TAS to TI_AM65_CPSW_QOS

We will use this Kconfig option to not only enable TAS/EST offload
but also other QoS features like Multiqueue priority descriptors
and MAC-Merge/Frame Preemption. TI_AM65_CPSW_QOS seems a more
appropriate Kconfig option name than TI_AM65_CPSW_TAS.

Signed-off-by: Roger Quadros <rogerq@kernel.org>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: cpmac: remove driver to prepare for platform removal

AR7 is going to be removed from the Kernel, so remove its networking
support in form of the cpmac driver. This allows us to remove the
platform because this driver includes a platform specific header.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/all/20230922061530.3121-6-wsa+renesas@sang-engineering.com/
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

net: ethernet: ti: Fix mixed module-builtin object

With CONFIG_TI_K3_AM65_CPSW_NUSS=y and CONFIG_TI_ICSSG_PRUETH=m,
k3-cppi-desc-pool.o is linked to a module and also to vmlinux even though
the expected CFLAGS are different between builtins and modules.

The build system is complaining about the following:

k3-cppi-desc-pool.o is added to multiple modules: icssg-prueth
ti-am65-cpsw-nuss

Introduce the new module, k3-cppi-desc-pool, to provide the common
functions to ti-am65-cpsw-nuss and icssg-prueth.

Fixes: 128d5874c082 ("net: ti: icssg-prueth: Add ICSSG ethernet driver")
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Link: https://lore.kernel.org/r/20231018064936.3146846-1-danishanwar@ti.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

net: ti: icssg-prueth: add PTP dependency

The driver can now use PTP if enabled but fails to link built-in
if PTP is a loadable module:

aarch64-linux-ld: drivers/net/ethernet/ti/icssg/icss_iep.o: in function `icss_iep_get_ptp_clock_idx':
icss_iep.c:(.text+0x200): undefined reference to `ptp_clock_index'

Add the usual dependency to avoid this.

Fixes: 186734c158865 ("net: ti: icssg-prueth: add packet timestamping and ptp support")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: MD Danish Anwar <danishanwar@ti.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ti: icssg-prueth: add packet timestamping and ptp support

Add packet timestamping TS and PTP PHC clock support.

For AM65x and AM64x:
- IEP1 is not used
- IEP0 is configured in shadow mode with 1ms cycle and shared between
Linux and FW. It provides time and TS in number cycles, so special
conversation in ns is required.
- IEP0 shared between PRUeth ports.
- IEP0 supports PPS, periodic output.
- IEP0 settime() and enabling PPS required FW interraction.
- RX TS provided with each packet in CPPI5 descriptor.
- TX TS returned through separate ICSSG hw queues for each port. TX TS
readiness is signaled by INTC IRQ. Only one packet at time can be requested
for TX TS.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Co-developed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ti: icss-iep: Add IEP driver

Add a driver for Industrial Ethernet Peripheral (IEP) block of PRUSS to
support timestamping of ethernet packets and thus support PTP and PPS
for PRU ethernet ports.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ti: icssg-prueth: Add ICSSG ethernet driver

This is the Ethernet driver for TI AM654 Silicon rev. 2
with the ICSSG PRU Sub-system running dual-EMAC firmware.

The Programmable Real-time Unit and Industrial Communication Subsystem
Gigabit (PRU_ICSSG) is a low-latency microcontroller subsystem in the TI
SoCs. This subsystem is provided for the use cases like implementation of
custom peripheral interfaces, offloading of tasks from the other
processor cores of the SoC, etc.

Every ICSSG core has two Programmable Real-Time Unit(PRUs),
two auxiliary Real-Time Transfer Unit (RT_PRUs), and
two Transmit Real-Time Transfer Units (TX_PRUs). Each one of these runs
its own firmware. Every ICSSG core has two MII ports connect to these
PRUs and also a MDIO port.

The cores can run different firmwares to support different protocols and
features like switch-dev, timestamping, etc.

It uses System DMA to transfer and receive packets and
shared memory register emulation between the firmware and
driver for control and configuration.

This patch adds support for basic EMAC functionality with 1Gbps
and 100Mbps link speed. 10M and half duplex mode are not supported
currently as they require IEP, the support for which will be added later.
Support for switch-dev, timestamp, etc. will be added later
by subsequent patch series.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ethernet: ti: davinci_mdio: fix build for mdio bitbang uses

davinci_mdio.c uses mdio bitbang APIs, so it should select
MDIO_BITBANG to prevent build errors.

arm-linux-gnueabi-ld: drivers/net/ethernet/ti/davinci_mdio.o: in function `davinci_mdio_remove':
drivers/net/ethernet/ti/davinci_mdio.c:649: undefined reference to `free_mdio_bitbang'
arm-linux-gnueabi-ld: drivers/net/ethernet/ti/davinci_mdio.o: in function `davinci_mdio_probe':
drivers/net/ethernet/ti/davinci_mdio.c:545: undefined reference to `alloc_mdio_bitbang'
arm-linux-gnueabi-ld: drivers/net/ethernet/ti/davinci_mdio.o: in function `davinci_mdiobb_read':
drivers/net/ethernet/ti/davinci_mdio.c:236: undefined reference to `mdiobb_read'
arm-linux-gnueabi-ld: drivers/net/ethernet/ti/davinci_mdio.o: in function `davinci_mdiobb_write':
drivers/net/ethernet/ti/davinci_mdio.c:253: undefined reference to `mdiobb_write'

Fixes: d04807b80691 ("net: ethernet: ti: davinci_mdio: Add workaround for errata i2329")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Ravi Gunasekaran <r-gunasekaran@ti.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Naresh Kamboju <naresh.kamboju@linaro.org>
Cc: Sudip Mukherjee (Codethink) <sudipm.mukherjee@gmail.com>
Link: https://lore.kernel.org/r/20220824024216.4939-1-rdunlap@infradead.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

net: ethernet: ti: am65-cpsw: Fix build error without PHYLINK

If PHYLINK is n, build fails:

drivers/net/ethernet/ti/am65-cpsw-ethtool.o: In function `am65_cpsw_set_link_ksettings':
am65-cpsw-ethtool.c:(.text+0x118): undefined reference to `phylink_ethtool_ksettings_set'
drivers/net/ethernet/ti/am65-cpsw-ethtool.o: In function `am65_cpsw_get_link_ksettings':
am65-cpsw-ethtool.c:(.text+0x138): undefined reference to `phylink_ethtool_ksettings_get'
drivers/net/ethernet/ti/am65-cpsw-ethtool.o: In function `am65_cpsw_set_eee':
am65-cpsw-ethtool.c:(.text+0x158): undefined reference to `phylink_ethtool_set_eee'

Select PHYLINK for TI_K3_AM65_CPSW_NUSS to fix this.

Fixes: e8609e69470f ("net: ethernet: ti: am65-cpsw: Convert to PHYLINK")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/20220409105931.9080-1-yuehaibing@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Revert "net: build all switchdev drivers as modules when the bridge is a module"

This reverts commit b0e81817629a496854ff1799f6cbd89597db65fd. Explicit
driver dependency on the bridge is no longer needed since
switchdev_bridge_port_{,un}offload() is no longer implemented by the
bridge driver but by switchdev.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Tested-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: build all switchdev drivers as modules when the bridge is a module

Currently, all drivers depend on the bool CONFIG_NET_SWITCHDEV, but only
the drivers that call some sort of function exported by the bridge, like
br_vlan_enabled() or whatever, have an extra dependency on CONFIG_BRIDGE.

Since the blamed commit, all switchdev drivers have a functional
dependency upon switchdev_bridge_port_{,un}offload(), which is a pair of
functions exported by the bridge module and not by the bridge-independent
part of CONFIG_NET_SWITCHDEV.

Problems appear when we have:

CONFIG_BRIDGE=m
CONFIG_NET_SWITCHDEV=y
CONFIG_TI_CPSW_SWITCHDEV=y

because cpsw, am65_cpsw and sparx5 will then be built-in but they will
call a symbol exported by a loadable module. This is not possible and
will result in the following build error:

drivers/net/ethernet/ti/cpsw_new.o: in function `cpsw_netdevice_event':
drivers/net/ethernet/ti/cpsw_new.c:1520: undefined reference to
`switchdev_bridge_port_offload'
drivers/net/ethernet/ti/cpsw_new.c:1537: undefined reference to
`switchdev_bridge_port_unoffload'

As mentioned, the other switchdev drivers don't suffer from this because
switchdev_bridge_port_offload() is not the first symbol exported by the
bridge that they are calling, so they already needed to deal with this
in the same way.

Fixes: 2f5dc00f7a3e ("net: bridge: switchdev: let drivers inform which bridge ports are offloaded")
Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ti: am65-cpsw-nuss: Add devlink support

AM65 NUSS ethernet switch on K3 devices can be configured to work either
in independent mac mode where each port acts as independent network
interface (multi mac) or switch mode.

Add devlink hooks to provide a way to switch b/w these modes.

Rationale to use devlink instead of defaulting to bridge mode is that
SoC use cases require to support multiple independent MAC ports with no
switching so that users can use software bridges with multi-mac
configuration (e.g: to support LAG, HSR/PRP, etc). Also, switching
between multi mac and switch mode requires significant Port and ALE
reconfiguration, therefore is easier to be made as part of mode change
devlink hooks. It also allows to keep user interface similar to what
was implemented for the previous generation of TI CPSW IP
(on AM33/AM43/AM57 SoCs).

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

docs: networking: reorganize driver documentation again

Organize driver documentation by device type. Most documents
have fairly verbose yet uninformative names, so let users
first select a well defined device type, and then search for
a particular driver.

While at it rename the section from Vendor drivers to
Hardware drivers. This seems more accurate, besides people
sometimes refer to out-of-tree drivers as vendor drivers.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

treewide: replace '---help---' in Kconfig files with 'help'

Since commit 84af7a6194e4 ("checkpatch: kconfig: prefer 'help' over
'---help---'"), the number of '---help---' has been gradually
decreasing, but there are still more than 2400 instances.

This commit finishes the conversion. While I touched the lines,
I also fixed the indentation.

There are a variety of indentation styles found.

a) 4 spaces + '---help---'
b) 7 spaces + '---help---'
c) 8 spaces + '---help---'
d) 1 space + 1 tab + '---help---'
e) 1 tab + '---help---' (correct indentation)
f) 1 tab + 1 space + '---help---'
g) 1 tab + 2 spaces + '---help---'

In order to convert all of them to 1 tab + 'help', I ran the
following commend:

$ find . -name 'Kconfig*' | xargs sed -i 's/^[[:space:]]*---help---/\thelp/'

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

ethernet: ti: am65-cpsw-qos: add TAPRIO offload support

AM65 CPSW h/w supports Enhanced Scheduled Traffic (EST – defined
in P802.1Qbv/D2.2 that later got included in IEEE 802.1Q-2018)
configuration. EST allows express queue traffic to be scheduled
(placed) on the wire at specific repeatable time intervals. In
Linux kernel, EST configuration is done through tc command and
the taprio scheduler in the net core implements a software only
scheduler (SCH_TAPRIO). If the NIC is capable of EST configuration,
user indicate "flag 2" in the command which is then parsed by
taprio scheduler in net core and indicate that the command is to
be offloaded to h/w. taprio then offloads the command to the
driver by calling ndo_setup_tc() ndo ops. This patch implements
ndo_setup_tc() to offload EST configuration to CPSW h/w.

Currently driver supports only SetGateStates operation. EST
operates on a repeating time interval generated by the CPTS EST
function generator. Each Ethernet port has a global EST fetch
RAM that can be configured as 2 buffers, each of 64 locations
or one large buffer of 128 locations. In 2 buffer configuration,
a ping pong mechanism is used to hold the active schedule (oper)
in one buffer and new (admin) command in the other. Each 22-bit
fetch command consists of a 14-bit fetch count (14 MSB’s) and an
8-bit priority fetch allow (8 LSB’s) that will be applied for the
fetch count time in wireside clocks. Driver process each of the
sched-entry in the offload command and update the fetch RAM.
Driver configures duration in sched-entry into the fetch count
and Gate mask into the priority fetch bits of the RAM. Then
configures the CPTS EST function generator to activate the
schedule. Currently driver supports only 2 buffer configuration
which means driver supports a max cycle time of ~8 msec.

CPSW supports a configurable number of priority queues (up to 8)
and needs to be switched to this mode from the default round
robin mode before EST can be offloaded. User configures
these through ethtool commands (-L for changing number of
queues and --set-priv-flags to disable round robin mode).
Driver doesn't enable EST if pf_p0_rx_ptype_rrobin privat flag
is set. The flag is common for all ports, and so can't be just
overridden by taprio configuration w/o user involvement.
Command fails if pf_p0_rx_ptype_rrobin is already set in the
driver.

Scheds (commands) configuration depends on interface speed so
driver translates the duration to the fetch count based on
link speed. Each schedule can be constructed with several
command entries in fetch RAM depending on interval. For example
if each sched has timer interval < ~130us on 1000 Mb link then
each sched consumes one command and have 1:1 mapping. When
Ethernet link goes down, driver purge the configuration if link
is down for more than 1 second.

The patch allows to update the timer and scheds memory only if it's
really needed, and skip cases required the user to stop timer by
configuring only shceds memory.

Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ethernet: ti: Remove TI_CPTS_MOD workaround

My recent commit b6d49cab44b5 ("net: Make PTP-specific drivers depend on
PTP_1588_CLOCK") exposes a missing dependency in defconfigs that select
TI_CPTS without selecting PTP_1588_CLOCK, leading to linker errors of the
form:

drivers/net/ethernet/ti/cpsw.o: in function `cpsw_ndo_stop':
cpsw.c:(.text+0x680): undefined reference to `cpts_unregister'
...

That's because TI_CPTS_MOD (which is the symbol gating the _compilation_ of
cpts.c) now depends on PTP_1588_CLOCK, and so is not enabled in these
configurations, but TI_CPTS (which is the symbol gating _calls_ to the cpts
functions) _is_ enabled. So we end up compiling calls to functions that
don't exist, resulting in the linker errors.

This patch fixes build errors and restores previous behavior by:
- ensure PTP_1588_CLOCK=y in TI specific configs and CPTS will be built
- remove TI_CPTS_MOD and, instead, add dependencies from CPTS in
TI_CPSW/TI_KEYSTONE_NETCP/TI_CPSW_SWITCHDEV as below:

config TI_CPSW_SWITCHDEV
...
depends on TI_CPTS || !TI_CPTS

which will ensure proper dependencies PTP_1588_CLOCK -> TI_CPTS ->
TI_CPSW/TI_KEYSTONE_NETCP/TI_CPSW_SWITCHDEV and build type selection.

Note. For NFS boot + CPTS all of above configs have to be built-in.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Dan Murphy <dmurphy@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Fixes: b6d49cab44b5 ("net: Make PTP-specific drivers depend on PTP_1588_CLOCK")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Clay McClure <clay@daemons.net>
[grygorii.strashko@ti.com: rewording, add deps cpsw/netcp from cpts, drop IS_REACHABLE]
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ethernet: ti: am65-cpts: fix build

It's possible to have build configuration which will force PTP_1588_CLOCK=m
and so TI_K3_AM65_CPTS=m while still have TI_K3_AM65_CPSW_NUSS=y. This will
cause build failures:

aarch64-linux-gnu-ld: ../drivers/net/ethernet/ti/am65-cpsw-nuss.o: in function `am65_cpsw_init_cpts':
../drivers/net/ethernet/ti/am65-cpsw-nuss.c:1685: undefined reference to `am65_cpts_create'
aarch64-linux-gnu-ld: ../drivers/net/ethernet/ti/am65-cpsw-nuss.c:1685:(.text+0x2e20):
relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `am65_cpts_create'

Fix it by adding dependencies from CPTS in TI_K3_AM65_CPSW_NUSS as below:
config TI_K3_AM65_CPSW_NUSS
...
depends on TI_K3_AM65_CPTS || !TI_K3_AM65_CPTS

Note. This will create below dependencies and for NFS boot + CPTS all of them
have to be built-in.
PTP_1588_CLOCK -> TI_K3_AM65_CPTS -> TI_K3_AM65_CPSW_NUSS

While here, clean up TI_K3_AM65_CPTS definition.

Fixes: b1f66a5bee07 ("net: ethernet: ti: am65-cpsw-nuss: enable packet timestamping support")
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reported-by: Anders Roxell <anders.roxell@linaro.org>
Tested-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ethernet: ti: am65-cpsw-nuss: enable packet timestamping support

The MCU CPSW Common Platform Time Sync (CPTS) provides possibility to
timestamp TX PTP packets and all RX packets.

This enables corresponding support in TI AM65x/J721E MCU CPSW driver.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ethernet: ti: introduce am654 common platform time sync driver

The CPTS module is used to facilitate host control of time sync operations.
Main features of CPTS module are:
- selection of multiple external clock sources
- control of time sync events via interrupt or polling
- 64-bit timestamp mode in ns with HW PPM and nudge adjustment.
- hardware timestamp ext. inputs (HWx_TS_PUSH)
- timestamp Generator function outputs (TS_GENFx)
Depending on integration it enables compliance with the IEEE 1588-2008
standard for a precision clock synchronization protocol, Ethernet Enhanced
Scheduled Traffic Operations (CPTS_ESTFn) and PCIe Subsystem Precision Time
Measurement (PTM).

Introduced driver provides Linux PTP hardware clock for each CPTS device
and network packets timestamping where applicable. CPTS PTP hardware clock
supports following operations:
- Set time
- Get time
- Shift the clock by a given offset atomically
- Adjust clock frequency
- Time stamp external events
- Periodic output signals

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: Make PTP-specific drivers depend on PTP_1588_CLOCK

Commit d1cbfd771ce8 ("ptp_clock: Allow for it to be optional") changed
all PTP-capable Ethernet drivers from `select PTP_1588_CLOCK` to `imply
PTP_1588_CLOCK`, "in order to break the hard dependency between the PTP
clock subsystem and ethernet drivers capable of being clock providers."
As a result it is possible to build PTP-capable Ethernet drivers without
the PTP subsystem by deselecting PTP_1588_CLOCK. Drivers are required to
handle the missing dependency gracefully.

Some PTP-capable Ethernet drivers (e.g., TI_CPSW) factor their PTP code
out into separate drivers (e.g., TI_CPTS_MOD). The above commit also
changed these PTP-specific drivers to `imply PTP_1588_CLOCK`, making it
possible to build them without the PTP subsystem. But as Grygorii
Strashko noted in [1]:

On Wed, Apr 22, 2020 at 02:16:11PM +0300, Grygorii Strashko wrote:

> Another question is that CPTS completely nonfunctional in this case and
> it was never expected that somebody will even try to use/run such
> configuration (except for random build purposes).

In my view, enabling a PTP-specific driver without the PTP subsystem is
a configuration error made possible by the above commit. Kconfig should
not allow users to create a configuration with missing dependencies that
results in "completely nonfunctional" drivers.

I audited all network drivers that call ptp_clock_register() but merely
`imply PTP_1588_CLOCK` and found five PTP-specific drivers that are
likely nonfunctional without PTP_1588_CLOCK:

NET_DSA_MV88E6XXX_PTP
NET_DSA_SJA1105_PTP
MACB_USE_HWSTAMP
CAVIUM_PTP
TI_CPTS_MOD

Note how these symbols all reference PTP or timestamping in their name;
this is a clue that they depend on PTP_1588_CLOCK.

Change them from `imply PTP_1588_CLOCK` [2] to `depends on PTP_1588_CLOCK`.
I'm not using `select PTP_1588_CLOCK` here because PTP_1588_CLOCK has
its own dependencies, which `select` would not transitively apply.

Additionally, remove the `select NET_PTP_CLASSIFY` from CPTS_TI_MOD;
PTP_1588_CLOCK already selects that.

[1]: https://lore.kernel.org/lkml/c04458ed-29ee-1797-3a11-7f3f560553e6@ti.com/

[2]: NET_DSA_SJA1105_PTP had never declared any type of dependency on
PTP_1588_CLOCK (`imply` or otherwise); adding a `depends on PTP_1588_CLOCK`
here seems appropriate.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Nicolas Pitre <nico@fluxnic.net>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Fixes: d1cbfd771ce8 ("ptp_clock: Allow for it to be optional")
Signed-off-by: Clay McClure <clay@daemons.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

docs: networking: device drivers: convert ti/tlan.txt to ReST

- add SPDX header;
- adjust titles and chapters, adding proper markups;
- mark tables as such;
- mark code blocks and literals as such;
- adjust identation, whitespaces and blank lines where needed;
- add to networking/index.rst.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ethernet: ti: introduce am65x/j721e gigabit eth subsystem driver

The TI AM65x/J721E SoCs Gigabit Ethernet Switch subsystem (CPSW2G NUSS) has
two ports - One Ethernet port (port 1) with selectable RGMII and RMII
interfaces and an internal Communications Port Programming Interface (CPPI)
port (Host port 0) and with ALE in between. It also contains
- Management Data Input/Output (MDIO) interface for physical layer device
(PHY) management;
- Updated Address Lookup Engine (ALE) module;
- (TBD) New version of Common platform time sync (CPTS) module.

On the TI am65x/J721E SoCs CPSW NUSS Ethernet subsystem into device MCU
domain named MCU_CPSW0.

Host Port 0 CPPI Packet Streaming Interface interface supports 8 TX
channels and one RX channels operating by TI am654 NAVSS Unified DMA
Peripheral Root Complex (UDMA-P) controller.

Introduced driver provides standard Linux net_device to user space and supports:
- ifconfig up/down
- MAC address configuration
- ethtool operation:
--driver
--change
--register-dump
--negotiate phy
--statistics
--set-eee phy
--show-ring
--show-channels
--set-channels
- net_device ioctl mii-control
- promisc mode

- rx checksum offload for non-fragmented IPv4/IPv6 TCP/UDP packets.
The CPSW NUSS can verify IPv4/IPv6 TCP/UDP packets checksum and fills
csum information for each packet in psdata[2] word:
- BIT(16) CHECKSUM_ERROR - indicates csum error
- BIT(17) FRAGMENT - indicates fragmented packet
- BIT(18) TCP_UDP_N - Indicates TCP packet was detected
- BIT(19) IPV6_VALID, BIT(20) IPV4_VALID - indicates IPv6/IPv4 packet
- BIT(15, 0) CHECKSUM_ADD - This is the value that was summed
during the checksum computation. This value is FFFFh for non fragmented
IPV4/6 UDP/TCP packets with no checksum error.

RX csum offload can be disabled:
ethtool -K <dev> rx-checksum on|off

- tx checksum offload support for IPv4/IPv6 TCP/UDP packets (J721E only).
TX csum HW offload can be enabled/disabled:
ethtool -K <dev> tx-checksum-ip-generic on|off

- multiq and switch between round robin/prio modes for cppi tx queues by
using Netdev private flag "p0-rx-ptype-rrobin" to switch between
Round Robin and Fixed priority modes:
# ethtool --show-priv-flags eth0
Private flags for eth0:
p0-rx-ptype-rrobin: on
# ethtool --set-priv-flags eth0 p0-rx-ptype-rrobin off

Number of TX DMA channels can be changed using "ethtool -L eth0 tx <N>".

- GRO support: the napi_gro_receive() and napi_complete_done() are used.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Tested-by: Murali Karicheri <m-karicheri2@ti.com>
Tested-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

phy: ti: gmii-sel: simplify config dependencies between net drivers and gmii phy

The phy-gmii-sel can be only auto selected in Kconfig and now the pretty
complex Kconfig dependencies are defined for phy-gmii-sel driver, which
also need to be updated every time phy-gmii-sel is re-used for any new
networking driver.

Simplify Kconfig definition for phy-gmii-sel PHY driver - drop all
dependencies and from networking drivers and rely on using 'imply
PHY_TI_GMII_SEL' in Kconfig definitions for networking drivers instead.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
Tested-by: Murali Karicheri <m-karicheri2@ti.com>
Tested-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ethernet: ti: select PAGE_POOL for switchdev driver

The new driver misses a dependency:

drivers/net/ethernet/ti/cpsw_new.o: In function `cpsw_rx_handler':
cpsw_new.c:(.text+0x259c): undefined reference to `__page_pool_put_page'
cpsw_new.c:(.text+0x25d0): undefined reference to `page_pool_alloc_pages'
drivers/net/ethernet/ti/cpsw_priv.o: In function `cpsw_fill_rx_channels':
cpsw_priv.c:(.text+0x22d8): undefined reference to `page_pool_alloc_pages'
cpsw_priv.c:(.text+0x2420): undefined reference to `__page_pool_put_page'
drivers/net/ethernet/ti/cpsw_priv.o: In function `cpsw_create_xdp_rxqs':
cpsw_priv.c:(.text+0x2624): undefined reference to `page_pool_create'
drivers/net/ethernet/ti/cpsw_priv.o: In function `cpsw_run_xdp':
cpsw_priv.c:(.text+0x2dc8): undefined reference to `__page_pool_put_page'

Other drivers use 'select' for PAGE_POOL, so do the same here.

Fixes: ed3525eda4c4 ("net: ethernet: ti: introduce cpsw switchdev based driver part 1 - dual-emac")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>

net: ethernet: ti: cpsw_switchdev: fix unmet direct dependencies detected for NET_SWITCHDEV

Replace "select NET_SWITCHDEV" vs "depends on NET_SWITCHDEV" to fix Kconfig
warning with CONFIG_COMPILE_TEST=y

WARNING: unmet direct dependencies detected for NET_SWITCHDEV
Depends on [n]: NET [=y] && INET [=n]
Selected by [y]:
- TI_CPSW_SWITCHDEV [=y] && NETDEVICES [=y] && ETHERNET [=y] && NET_VENDOR_TI [=y] && (ARCH_DAVINCI || ARCH_OMAP2PLUS || COMPILE_TEST [=y])

because TI_CPSW_SWITCHDEV blindly selects NET_SWITCHDEV even though
INET is not set/enabled, while NET_SWITCHDEV depends on INET.

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Fixes: ed3525eda4c4 ("net: ethernet: ti: introduce cpsw switchdev based driver part 1 - dual-emac")
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ethernet: ti: introduce cpsw switchdev based driver part 1 - dual-emac

Part 1:
Introduce basic CPSW dual_mac driver (cpsw_new.c) which is operating in
dual-emac mode by default, thus working as 2 individual network interfaces.
Main differences from legacy CPSW driver are:

- optimized promiscuous mode: The P0_UNI_FLOOD (both ports) is enabled in
addition to ALLMULTI (current port) instead of ALE_BYPASS. So, Ports in
promiscuous mode will keep possibility of mcast and vlan filtering, which
is provides significant benefits when ports are joined to the same bridge,
but without enabling "switch" mode, or to different bridges.
- learning disabled on ports as it make not too much sense for
segregated ports - no forwarding in HW.
- enabled basic support for devlink.

devlink dev show
platform/48484000.switch

devlink dev param show
platform/48484000.switch:
name ale_bypass type driver-specific
values:
cmode runtime value false

- "ale_bypass" devlink driver parameter allows to enable
ALE_CONTROL(4).BYPASS mode for debug purposes.
- updated DT bindings.

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ethernet: ti: Add dependency for TI_DAVINCI_EMAC

If TI_DAVINCI_EMAC=y and GENERIC_ALLOCATOR is not set,
below erros can be seen:
drivers/net/ethernet/ti/davinci_cpdma.o: In function `cpdma_desc_pool_destroy.isra.14':
davinci_cpdma.c:(.text+0x359): undefined reference to `gen_pool_size'
davinci_cpdma.c:(.text+0x365): undefined reference to `gen_pool_avail'
davinci_cpdma.c:(.text+0x373): undefined reference to `gen_pool_avail'
davinci_cpdma.c:(.text+0x37f): undefined reference to `gen_pool_size'
drivers/net/ethernet/ti/davinci_cpdma.o: In function `__cpdma_chan_free':
davinci_cpdma.c:(.text+0x4a2): undefined reference to `gen_pool_free_owner'
drivers/net/ethernet/ti/davinci_cpdma.o: In function `cpdma_chan_submit_si':
davinci_cpdma.c:(.text+0x66c): undefined reference to `gen_pool_alloc_algo_owner'
davinci_cpdma.c:(.text+0x805): undefined reference to `gen_pool_free_owner'
drivers/net/ethernet/ti/davinci_cpdma.o: In function `cpdma_ctlr_create':
davinci_cpdma.c:(.text+0xabd): undefined reference to `devm_gen_pool_create'
davinci_cpdma.c:(.text+0xb79): undefined reference to `gen_pool_add_owner'
drivers/net/ethernet/ti/davinci_cpdma.o: In function `cpdma_check_free_tx_desc':
davinci_cpdma.c:(.text+0x16c6): undefined reference to `gen_pool_avail'

This patch mades TI_DAVINCI_EMAC select GENERIC_ALLOCATOR.

Fixes: 99f629718272 ("net: ethernet: ti: cpsw: drop TI_DAVINCI_CPDMA config option")
Signed-off-by: Mao Wenan <maowenan@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ethernet: ti: cpsw: add XDP support

Add XDP support based on rx page_pool allocator, one frame per page.
Page pool allocator is used with assumption that only one rx_handler
is running simultaneously. DMA map/unmap is reused from page pool
despite there is no need to map whole page.

Due to specific of cpsw, the same TX/RX handler can be used by 2
network devices, so special fields in buffer are added to identify
an interface the frame is destined to. Thus XDP works for both
interfaces, that allows to test xdp redirect between two interfaces
easily. Also, each rx queue have own page pools, but common for both
netdevs.

XDP prog is common for all channels till appropriate changes are added
in XDP infrastructure. Also, once page_pool recycling becomes part of
skb netstack some simplifications can be added, like removing
page_pool_release_page() before skb receive.

In order to keep rx_dev while redirect, that can be somehow used in
future, do flush in rx_handler, that allows to keep rx dev the same
while redirect. It allows to conform with tracing rx_dev pointed
by Jesper.

Also, there is probability, that XDP generic code can be extended to
support multi ndev drivers like this one, using same rx queue for
several ndevs, based on switchdev for instance or else. In this case,
driver can be modified like exposed here:
https://lkml.org/lkml/2019/7/3/243

Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ethernet: ti: cpts: fix build failure for powerpc

Add dependency to TI CPTS from Common CLK framework COMMON_CLK to fix
allyesconfig build for Powerpc:

drivers/net/ethernet/ti/cpts.c: In function 'cpts_of_mux_clk_setup':
drivers/net/ethernet/ti/cpts.c:567:2: error: implicit declaration of function 'of_clk_parent_fill'; did you mean 'of_clk_get_parent_name'? [-Werror=implicit-function-declaration]
of_clk_parent_fill(refclk_np, parent_names, num_parents);
^~~~~~~~~~~~~~~~~~
of_clk_get_parent_name

Fixes: a3047a81ba13 ("net: ethernet: ti: cpts: add support for ext rftclk selection")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

treewide: Add SPDX license identifier - Makefile/Kconfig

Add SPDX license identifiers to all Make/Kconfig files which:

- Have no license information of any form

These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:

GPL-2.0-only

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

net: ethernet: ti: cpsw: drop CONFIG_TI_CPSW_ALE config option

All TI drivers CPSW/NETCP can't work without ALE, hence simplify
build of those drivers by always linking cpsw_ale and drop
CONFIG_TI_CPSW_ALE config option.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ethernet: ti: cpsw: drop TI_DAVINCI_CPDMA config option

Both drivers CPSW and EMAC can't work without CPDMA, hence simplify build
of those drivers by always linking davinci_cpdma and drop TI_DAVINCI_CPDMA
config option.
Note. the davinci_emac driver module was changed to "ti_davinci_emac" to
make build work.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ethernet: ti: cpsw: deprecate cpsw-phy-sel driver

Deprecate cpsw-phy-sel driver as it's been replaced with new
TI phy-gmii-sel PHY driver.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

net: documentation: build a directory structure for drivers

Documentation/networking/ is full of cryptically named files with
driver documentation. This makes finding interesting information
at a glance really hard. Move all those files into a directory
called device_drivers (since not all drivers are for device) and
fix up references.

RFC v0.1 -> RFC v1:
- also add .txt suffix to the files which are missing it (Quentin)

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: David Ahern <dsahern@gmail.com>
Acked-by: Henrik Austad <henrik@austad.us>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ethernet: ti: add missing GENERIC_ALLOCATOR dependency

This patch mades TI_DAVINCI_CPDMA select GENERIC_ALLOCATOR.
without that, the following sparc64 build failure happen

drivers/net/ethernet/ti/davinci_cpdma.o: In function `cpdma_check_free_tx_desc':
(.text+0x278): undefined reference to `gen_pool_avail'
drivers/net/ethernet/ti/davinci_cpdma.o: In function `cpdma_chan_submit':
(.text+0x340): undefined reference to `gen_pool_alloc'
(.text+0x5c4): undefined reference to `gen_pool_free'
drivers/net/ethernet/ti/davinci_cpdma.o: In function `__cpdma_chan_free':
davinci_cpdma.c:(.text+0x64c): undefined reference to `gen_pool_free'
drivers/net/ethernet/ti/davinci_cpdma.o: In function `cpdma_desc_pool_destroy.isra.6':
davinci_cpdma.c:(.text+0x17ac): undefined reference to `gen_pool_size'
davinci_cpdma.c:(.text+0x17b8): undefined reference to `gen_pool_avail'
davinci_cpdma.c:(.text+0x1824): undefined reference to `gen_pool_size'
davinci_cpdma.c:(.text+0x1830): undefined reference to `gen_pool_avail'
drivers/net/ethernet/ti/davinci_cpdma.o: In function `cpdma_ctlr_create':
(.text+0x19f8): undefined reference to `devm_gen_pool_create'
(.text+0x1a90): undefined reference to `gen_pool_add_virt'
Makefile:1011: recipe for target 'vmlinux' failed

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ethernet: ti: Allow most drivers with COMPILE_TEST

Most of the TI drivers build just fine with COMPILE_TEST, cpmac (AR7) is
the exception because it uses a header file from
arch/mips/include/asm/mach-ar7/ar7.h and keystone netcp which requires
help from drivers/soc/ti/ for queue management helpers.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

cpsw/netcp: refine cpts dependency

Tony Lindgren reports a kernel oops that resulted from my compile-time
fix on the default config. This shows two problems:

a) configurations that did not already enable PTP_1588_CLOCK will
now miss the cpts driver

b) when cpts support is disabled, the driver crashes. This is a
preexisting problem that we did not notice before my patch.

While the second problem is still being investigated, this modifies
the dependencies again, getting us back to the original state, with
another 'select NET_PTP_CLASSIFY' added in to avoid the original
link error we got, and the 'depends on POSIX_TIMERS' to hide
the CPTS support when turning it on would be useless.

Cc: stable@vger.kernel.org # 4.11 needs this
Fixes: 07fef3623407 ("cpsw/netcp: cpts depends on posix_timers")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

cpsw/netcp: cpts depends on posix_timers

With posix timers having become optional, we get a build error with
the cpts time sync option of the CPSW driver:

drivers/net/ethernet/ti/cpts.c: In function 'cpts_find_ts':
drivers/net/ethernet/ti/cpts.c:291:23: error: implicit declaration of function 'ptp_classify_raw';did you mean 'ptp_classifier_init'? [-Werror=implicit-function-declaration]

This adds a hard dependency on PTP_CLOCK to avoid the problem, as
building it without PTP support makes no sense anyway.

Fixes: baa73d9e478f ("posix-timers: Make them configurable")
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Cc: stable@vger.kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

cpsw/netcp: work around reverse cpts dependency

The dependency is reversed: cpsw and netcp call into cpts,
but cpts depends on the other two in Kconfig. This can lead
to cpts being a loadable module and its callers built-in:

drivers/net/ethernet/ti/cpsw.o: In function `cpsw_remove':
cpsw.c:(.text.cpsw_remove+0xd0): undefined reference to `cpts_release'
drivers/net/ethernet/ti/cpsw.o: In function `cpsw_rx_handler':
cpsw.c:(.text.cpsw_rx_handler+0x2dc): undefined reference to `cpts_rx_timestamp'
drivers/net/ethernet/ti/cpsw.o: In function `cpsw_tx_handler':
cpsw.c:(.text.cpsw_tx_handler+0x7c): undefined reference to `cpts_tx_timestamp'
drivers/net/ethernet/ti/cpsw.o: In function `cpsw_ndo_stop':

As a workaround, I'm introducing another Kconfig symbol to
control the compilation of cpts, while making the actual
module controlled by a silent symbol that is =y when necessary.

Fixes: 6246168b4a38 ("net: ethernet: ti: netcp: add support of cpts")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ethernet: ti: netcp: add support of cpts

This patch adds support of the cpts device found in the
gbe and 10gbe ethernet switches on the keystone 2 SoCs
(66AK2E/L/Hx, 66AK2Gx).

Cc: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: WingMan Kwok <w-kwok2@ti.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ethernet: ti: allow cpts to be built separately

TI CPTS IP is used as part of TI OMAP CPSW driver, but it's also
present as part of NETCP on TI Keystone 2 SoCs. So, It's required
to enable build of CPTS for both this drivers and this can be
achieved by allowing CPTS to be built separately.

Hence, allow cpts to be built separately and convert it to be
a module as both CPSW and NETCP drives can be built as modules.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

ptp_clock: Allow for it to be optional

In order to break the hard dependency between the PTP clock subsystem and
ethernet drivers capable of being clock providers, this patch provides
simple PTP stub functions to allow linkage of those drivers into the
kernel even when the PTP subsystem is configured out. Drivers must be
ready to accept NULL from ptp_clock_register() in that case.

And to make it possible for PTP to be configured out, the select statement
in those driver's Kconfig menu entries is converted to the new "imply"
statement. This way the PTP subsystem may have Kconfig dependencies of
its own, such as POSIX_TIMERS, without having to make those ethernet
drivers unavailable if POSIX timers are cconfigured out. And when support
for POSIX timers is selected again then the default config option for PTP
clock support will automatically be adjusted accordingly.

The pch_gbe driver is a bit special as it relies on extra code in
drivers/ptp/ptp_pch.c. Therefore we let the make process descend into
drivers/ptp/ even if PTP_1588_CLOCK is unselected.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Acked-by: Edward Cree <ecree@solarflare.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: John Stultz <john.stultz@linaro.org>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Cc: Paul Bolle <pebolle@tiscali.nl>
Cc: linux-kbuild@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: Michal Marek <mmarek@suse.com>
Link: http://lkml.kernel.org/r/1478841010-28605-4-git-send-email-nicolas.pitre@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

net: cpsw: make TI_CPSW_PHY_SEL invisible

TI_CPSW_PHY_SEL depended on TI_CPSW and was selected by the latter. So
there is no reason to have this symbol visible.

A further optimisation would be to put the code for both symbols into a
single module which would allow to not export at least cpsw_phy_sel()
and simplify the module load process.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net: remove all references to obsolete Ethernet-HOWTO

This howto made sense in the 1990s when users had to manually configure
ISA cards with jumpers or vendor utilities, but with the implementation
of PCI it became increasingly less and less relevant, to the point where
it has been well over a decade since I last updated it. And there is
no value in anyone else taking over updating it either.

However the references to it continue to spread as boiler plate text
from one Kconfig file into the next. We are not doing end users any
favours by pointing them at this old document, so lets kill it with
fire, once and for all, to hopefully stop any further spread.

No code is changed in this commit, just Kconfig help text.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: netcp: select davinci_mdio driver by default

Keystone netcp driver re-uses davinci mdio driver. So enable it
by default for keystone netcp driver.

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: WingMan Kwok <w-kwok2@ti.com>
CC: "David S. Miller" <davem@davemloft.net>
CC: Mugunthan V N <mugunthanvnm@ti.com>
CC: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>
CC: Grygorii Strashko <grygorii.strashko@ti.com>
CC: Christoph Jaeger <cj@linux.com>
CC: Lokesh Vutla <lokeshvutla@ti.com>
CC: Markus Pargmann <mpa@pengutronix.de>
CC: Kumar Gala <galak@codeaurora.org>
CC: Ian Campbell <ijc+devicetree@hellion.org.uk>
CC: Mark Rutland <mark.rutland@arm.com>
CC: Pawel Moll <pawel.moll@arm.com>
CC: Rob Herring <robh+dt@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers: net: cpsw: make cpsw_ale.c a module to allow re-use on Keystone

NetCP on Keystone has cpsw ale function similar to other TI SoCs
and this driver is re-used. To allow both ti cpsw and keystone netcp
to re-use the driver, convert the cpsw ale to a module and configure
it through Kconfig option CONFIG_TI_CPSW_ALE. Currently it is statically
linked to both TI CPSW and NetCP and this causes issues when the above
drivers are built as dynamic modules. This patch addresses this issue

While at it, fix the Makefile and code to build both netcp_core and
netcp_ethss as dynamic modules. This is needed to support arm allmodconfig.
This also requires exporting of API calls provided by netcp_core so that
both the above can be dynamic modules.

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Acked-by: Mugunthan V N <mugunthanvnm@ti.com>
Tested-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: netcp: remove unused kconfig option and code

Currently CPTS is built into the netcp driver even though there is no
call out to the CPTS driver. This patch removes the dependency in Kconfig
and remove cpts.o from the Makefile for NetCP.

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: netcp: Add Keystone NetCP core ethernet driver

The network coprocessor (NetCP) is a hardware accelerator available in
Keystone SoCs that processes Ethernet packets. NetCP consists of following
hardware components

1 Gigabit Ethernet (GbE) subsystem with a Ethernet switch sub-module to
send and receive packets.
2 Packet Accelerator (PA) module to perform packet classification
operations such as header matching, and packet modification operations
such as checksum generation.
3 Security Accelerator(SA) capable of performing IPSec operations on
ingress/egress packets.
4 An optional 10 Gigabit Ethernet Subsystem (XGbE) which includes a
3-port Ethernet switch sub-module capable of 10Gb/s and 1Gb/s rates
per Ethernet port.
5 Packet DMA and Queue Management Subsystem (QMSS) to enqueue and dequeue
packets and DMA the packets between memory and NetCP hardware components
described above.

NetCP core driver make use of the Keystone Navigator driver API to allocate
DMA channel for the Ethenet device and to handle packet queue/de-queue,
Please refer API's in include/linux/soc/ti/knav_dma.h and
drivers/soc/ti/knav_qmss.h for details.

NetCP driver consists of NetCP core driver and at a minimum Gigabit
Ethernet (GBE) module (1) driver to implement the Network device function.
Other modules (2,3) can be optionally added to achieve supported hardware
acceleration function. The initial version of the driver include NetCP
core driver and GBE driver modules.

Please refer Documentation/devicetree/bindings/net/keystone-netcp.txt
for design of the driver.

Cc: David Miller <davem@davemloft.net>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Santosh Shilimkar <santosh.shilimkar@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Wingman Kwok <w-kwok2@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

kconfig: use bool instead of boolean for type definition attributes

Support for keyword 'boolean' will be dropped later on.

No functional change.

Reference: http://lkml.kernel.org/r/cover.1418003065.git.cj@linux.com
Signed-off-by: Christoph Jaeger <cj@linux.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>

drivers: net : cpsw: Update Kconfig for CPSW

CPSW is present in AM33xx, AM43xx, DRA7xx.
Updating the Kconfig to depend on ARCH_OMAP2PLUS instead of listing
all SoC's.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Acked-by: Mugunthan V N <mugunthanvnm@ti.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: cpsw: Add am33xx MACID readout

This patch adds a function to get the MACIDs from the am33xx SoC
control module registers which hold unique vendor MACIDs. This is only
used if of_get_mac_address() fails to get a valid mac address.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Reviewed-by: Wolfram Sang <wsa@the-dreams.de>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: davinci_mdio: reuse for keystone2 arch

The similar MDIO HW blocks is used by keystone 2 SoCs as
in Davinci SoCs:
- one in Gigabit Ethernet (GbE) Switch Subsystem
See http://www.ti.com/lit/ug/sprugv9d/sprugv9d.pdf
- one in 10 Gigabit Ethernet Subsystem
See http://www.ti.com/lit/ug/spruhj5/spruhj5.pdf

Hence, reuse Davinci MDIO driver for Keystone 2 and
enable TI networking for Keystone 2 devices

Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers: net: cpsw-phy-sel: Add new driver for phy mode selection for cpsw

The cpsw currently lacks code to properly set up the hardware interface
mode on AM33xx. Other platforms might be equally affected.

Usually, the bootloader will configure the control module register, so
probably that's why such support wasn't needed in the past. In suspend
mode though, this register is modified, and so it needs reprogramming
after resume.

This patch adds a new driver in which hardware interface can configure
correct register bits when the slave is opened.

The AM33xx also has a bit for each slave to configure the RMII reference
clock direction. Setting it is now supported by a per-slave DT property.

This code path introducted by this patch is currently exclusive for
am33xx and same can be extened to various platforms via the DT compatibility
property.

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Tested-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/ti: remove depends on CONFIG_EXPERIMENTAL

The CONFIG_EXPERIMENTAL config item has not carried much meaning for a
while now and is almost always enabled by default. As agreed during the
Linux kernel summit, remove it from any "depends on" lines in Kconfigs.

CC: Tony Lindgren <tony@atomide.com>
CC: Mugunthan V N <mugunthanvnm@ti.com>
CC: Kevin Hilman <khilman@ti.com>
CC: "David S. Miller" <davem@davemloft.net>
CC: Cyril Chemparathy <cyril@ti.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: David S. Miller <davem@davemloft.net>

cpts: add missing kconfig dependency

The Common Platform Time Sync function of the CPSW does not depend the
CPSW configuration option as it should. This patch fixes the issue by
adding the dependency.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

ptp: fixup Kconfig for two PHC drivers.

Ben Hutchings recently came up with a better way to handle the kconfig
dependencies for the PTP hardware clocks. This patch converts one new and
one older driver to the new scheme.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

cpts: introduce time stamping code and a PTP hardware clock.

This patch adds a driver for the CPTS that offers time
stamping and a PTP hardware clock. Because some of the
CPTS hardware variants (like the am335x) do not support
frequency adjustment, we have implemented this in software
by changing the multiplication factor of the timecounter.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

NET_VENDOR_TI: make available for am33xx as well

The cpsw/davinci mdio ip cores are present on am33xx, so make NET_VENDOR_TI
visible for it as well.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers: net: ethernet: cpsw: Add SOC dependency support for cpsw dependent modules

cpsw is dependent on davinci_cpdma and davinci_mdio, so adding SOC support for
dependent modules

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

ARM: OMAP2+: Kconfig: convert SOC_OMAPAM33XX to SOC_AM33XX

No need to have an OMAP prefix on these SoCs that are in the family
but arent' really called OMAP.

Simple rename: CONFIG_SOC_OMAPAM33XX --> CONFIG_SOC_AM33XX

No functional change.

Signed-off-by: Kevin Hilman <khilman@ti.com>
Acked-by: Vaibhav Hiremath <hvaibhav@ti.com>
[tony@atomide.com: updated for the driver config change also]
Signed-off-by: Tony Lindgren <tony@atomide.com>

netdev: driver: ethernet: Add TI CPSW driver

This patch adds support for TI's CPSW driver.

The three port switch gigabit ethernet subsystem provides ethernet packet
communication and can be configured as an ethernet switch. Supports
10/100/1000 Mbps.

Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Signed-off-by: Sriramakrishnan A G <srk@ti.com>
Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/*: Enabled vendor Kconfig options

Based on finds for Stephen Rothwell, where current defconfig's
enable a ethernet driver and it is not compiled due to the newly
added NET_VENDOR_* component of Kconfig.

This patch enables all the "new" Kconfig options so that current
defconfig's will continue to compile the expected drivers. In
addition, by enabling all the new Kconfig options does not add
any un-expected options.

CC: Stephen Rothwll <sfc@canb.auug.org.au>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

davinci*/tlan/cpmac: Move the Texas Instruments (TI) drivers

Move the Texas Instruments drivers to drivers/net/ethernet/ti/ and
make the necessary Kconfig and Makefile changes.

CC: Sriram <srk@ti.com>
CC: Vinay Hegde <vinay.hegde@ti.com>
CC: Cyril Chemparathy <cyril@ti.com>
CC: Samuel Chessman <chessman@tux.org>
CC: <torben.mathiasen@compaq.com>
CC: Eugene Konev <ejka@imfi.kspu.ru>
CC: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>