[PATCH v9 0/2] Introduce ICSSG based ethernet Driver

MD Danish Anwar
2023-07-14T09:45:39Z

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 the implementation
of custom peripheral interfaces, offloading of tasks from the other
processor cores of the SoC, etc.

The subsystem includes many accelerators for data processing like
multiplier and multiplier-accumulator. It also has peripherals like
UART, MII/RGMII, MDIO, etc. Every ICSSG core includes two 32-bit
load/store RISC CPU cores called PRUs.

The above features allow it to be used for implementing custom firmware
based peripherals like ethernet.

This series adds the YAML documentation and the driver with basic EMAC
support for TI AM654 Silicon Rev 2 SoC with the PRU_ICSSG Sub-system.
running dual-EMAC firmware.
This currently supports basic EMAC with 1Gbps and 100Mbps link. 10M and
half-duplex modes are not yet supported because they require the support
of an IEP, which will be added later.
Advanced features like switch-dev and timestamping will be added later.

This is the v9 of the patch series [v1]. This version of the patchset
addresses comments made on v8.

There series doesn't have any dependency.

Changes from v8 to v9 :
*) Rebased the series on latest net-next.
*) Fixed smatch and sparse warnings as pointed by Simon.
*) Fixed leaky ndev in prueth_netdev_init() as asked by Simon.

Changes from v7 to v8 :
*) Rebased the series on 6.5-rc1.
*) Fixed few formattings.

Changes from v6 to v7 :
*) Added RB tag of Rob in patch 1 of this series.
*) Addressed Simon's comment on patch 2 of the series.
*) Rebased patchset on next-20230428 linux-next.

Changes from v5 to v6 :
*) Added RB tag of Andrew Lunn in patch 2 of this series.
*) Addressed Rob's comment on patch 1 of the series.
*) Rebased patchset on next-20230421 linux-next.

Changes from v4 to v5 :
*) Re-arranged properties section in ti,icssg-prueth.yaml file.
*) Added requirement for minimum one ethernet port.
*) Fixed some minor formatting errors as asked by Krzysztof.
*) Dropped SGMII mode from enum mii_mode as SGMII mode is not currently
supported by the driver.
*) Added switch-case block to handle different phy modes by ICSSG driver.

Changes from v3 to v4 :
*) Addressed Krzysztof's comments and fixed dt_binding_check errors in
patch 1/2.
*) Added interrupt-extended property in ethernet-ports properties section.
*) Fixed comments in file icssg_switch_map.h according to the Linux coding
style in patch 2/2. Added Documentation of structures in patch 2/2.

Changes from v2 to v3 :
*) Addressed Rob and Krzysztof's comments on patch 1 of this series.
Fixed indentation. Removed description and pinctrl section from
ti,icssg-prueth.yaml file.
*) Addressed Krzysztof, Paolo, Randy, Andrew and Christophe's comments on
patch 2 of this seires.
*) Fixed blanklines in Kconfig and Makefile. Changed structures to const
as suggested by Krzysztof.
*) Fixed while loop logic in emac_tx_complete_packets() API as suggested
by Paolo. Previously in the loop's last iteration 'budget' was 0 and
napi_consume_skb would wrongly assume the caller is not in NAPI context
Now, budget won't be zero in last iteration of loop.
*) Removed inline functions addr_to_da1() and addr_to_da0() as asked by
Andrew.
*) Added dev_err_probe() instead of dev_err() as suggested by Christophe.
*) In ti,icssg-prueth.yaml file, in the patternProperties section of
ethernet-ports, kept the port name as "port" instead of "ethernet-port"
as all other drivers were using "port". Will change it if is compulsory
to use "ethernet-port".

[v1] https://lore.kernel.org/all/20220506052433.28087-1-p-mohan@ti.com/
[v2] https://lore.kernel.org/all/20220531095108.21757-1-p-mohan@ti.com/
[v3] https://lore.kernel.org/all/20221223110930.1337536-1-danishanwar@ti.com/
[v4] https://lore.kernel.org/all/20230206060708.3574472-1-danishanwar@ti.com/
[v5] https://lore.kernel.org/all/20230210114957.2667963-1-danishanwar@ti.com/
[v6] https://lore.kernel.org/all/20230424053233.2338782-1-danishanwar@ti.com/
[v7] https://lore.kernel.org/all/20230502061650.2716736-1-danishanwar@ti.com/
[v8] https://lore.kernel.org/all/20230710053550.89160-1-danishanwar@ti.com/

Thanks and Regards,
Md Danish Anwar

MD Danish Anwar (1):
dt-bindings: net: Add ICSSG Ethernet

Roger Quadros (1):
net: ti: icssg-prueth: Add ICSSG ethernet driver

.../bindings/net/ti,icssg-prueth.yaml | 184 ++
drivers/net/ethernet/ti/Kconfig | 13 +
drivers/net/ethernet/ti/Makefile | 2 +
drivers/net/ethernet/ti/icssg_classifier.c | 367 ++++
drivers/net/ethernet/ti/icssg_config.c | 450 ++++
drivers/net/ethernet/ti/icssg_config.h | 200 ++
drivers/net/ethernet/ti/icssg_ethtool.c | 326 +++
drivers/net/ethernet/ti/icssg_mii_cfg.c | 120 ++
drivers/net/ethernet/ti/icssg_mii_rt.h | 151 ++
drivers/net/ethernet/ti/icssg_prueth.c | 1889 +++++++++++++++++
drivers/net/ethernet/ti/icssg_prueth.h | 252 +++
drivers/net/ethernet/ti/icssg_queues.c | 38 +
drivers/net/ethernet/ti/icssg_switch_map.h | 234 ++
13 files changed, 4226 insertions(+)
create mode 100644 Documentation/devicetree/bindings/net/ti,icssg-prueth.yaml
create mode 100644 drivers/net/ethernet/ti/icssg_classifier.c
create mode 100644 drivers/net/ethernet/ti/icssg_config.c
create mode 100644 drivers/net/ethernet/ti/icssg_config.h
create mode 100644 drivers/net/ethernet/ti/icssg_ethtool.c
create mode 100644 drivers/net/ethernet/ti/icssg_mii_cfg.c
create mode 100644 drivers/net/ethernet/ti/icssg_mii_rt.h
create mode 100644 drivers/net/ethernet/ti/icssg_prueth.c
create mode 100644 drivers/net/ethernet/ti/icssg_prueth.h
create mode 100644 drivers/net/ethernet/ti/icssg_queues.c
create mode 100644 drivers/net/ethernet/ti/icssg_switch_map.h