[RFC PATCH v3 00/15] Introduce ICSSG Ethernet driver

[MD Danish Anwar]

Introduce ICSSG PRUETH support in uboot. The ICSSG driver is used in TI
AM654 SR2.0.

The ICSSG PRU Sub-system runs on EMAC firmware. This series Introduces
support for ICSSG driver in uboot. This series also adds the driver's
dependencies.

The ICSSG2 node is added in device tree overlay so that it remains in
sync with linux kernel.

The series introduces device tree and config changes and AM65x
to enable ICSSG driver. The series also enables SPL_LOAD_FIT_APPLY_OVERLAY
for AM65x in order to load overlay over spl.

This series has been tested on AM65x SR2.0, and the ICSSG interface is
able to ping / dhcp and boot kernel using tftp in uboot.

To use ICSSG2 ethernet, the ICSSG firmware needs to be loaded to PRU RPROC
cores and RPROC cores need to be booted with the firmware. This step is
done inside driver similar to kernel.

The remoteproc driver uses request_fw_into_buf() API from fs-loader driver
to load and start rproc with the required firmwares.

The users need to set env variables fw_storage_interface, fw_dev_part,
fw_ubi_mtdpart, fw_ubi_volume to indicate which storage medium and
partition they want to use to load firmware files from. By default the env
fw_storage_interface=mmc and fw_dev_part=1:2 but users can modify these
envs as per their requirements.

Log while running dhcp at u-boot:

k3-navss-ringacc ringacc at 3c000000: Ring Accelerator probed rings:818, gp-rings[304,100] sci-dev-id:187
k3-navss-ringacc ringacc at 3c000000: dma-ring-reset-quirk: disabled
prueth icssg2-eth: K3 ICSSG: rflow_id_base: 8, chn_name = rx0
link up on port 0, speed 1000, full duplex
BOOTP broadcast 1
BOOTP broadcast 2
BOOTP broadcast 3
DHCP client bound to address 192.168.4.97 (1037 ms)

This is v3 of the series [1].

Changes from v2 [2] to v3:
*) No functional changes.
*) Rebased the series on latest u-boot/next.
*) Dropped the RFC tag.

Changes from v1 to v2:
*) Modified the driver to load the firmware inside the driver only instead
   of loading the firmware using commands at u-boot prompt. Added patch
   3/16 for this.
*) Rebased the series on the latest u-boot/next.
*) Modified conf-0 configuration in k3-am65x-binman.dtsi as suggested by
   Roger.
*) Dropped patch [3] as the patch is no longer needed.
*) Added patch 2/15 to modify fs-loader driver to use fw_storage_interface
   env instead of storage_interface and keep the env storage_interface as
   fallback as suggested by Roger.
*) Added patch 15/15 to set default values to env fw_storage_interface and
   fw_dev_part.

[1] https://lore.kernel.org/all/20231219103418.3445886-1-danishanwar@ti.com/
[2] https://lore.kernel.org/all/20240111070611.342701-1-danishanwar@ti.com/
[3] https://lore.kernel.org/all/20231219103418.3445886-16-danishanwar@ti.com/

NOTE: All the device tree changes introduced in this patch are already
part of upstream linux kernel.

Thanks and Regards,
MD Danish Anwar

MD Danish Anwar (15):
  dma: ti: k3-udma: Use ring_idx to pair k3 nav rings
  misc: fs-loader: Use fw_storage_interface instead of storage_interface
  remoteproc: uclass: Add methods to load firmware to rproc and boot
    rproc
  net: ti: icssg: Add Firmware Interface for ICSSG Ethernet driver.
  net: ti: icssg: Add Firmware config and classification APIs.
  net: ti: icssg: Add icssg queues APIs and macros
  net: ti: icssg: Add ICSSG ethernet driver
  net: ti: icssg: Add support sending FDB command to update rx_flow_id
  net: ti: icssg: Enforce pinctrl state on the MDIO child node
  arm: dts: k3-am654-base-board: Add ICSSG2 Ethernet support
  arm: dts: k3-am65x-binman: Add ICSSG2 overlay and configuration
  configs: am65x_evm_a53: Enable ICSSG Driver
  configs: am65x_evm_a53: add SPL_LOAD_FIT_APPLY_OVERLAY
  board: ti: am65x: Add check for k3-am654-icssg2 in
    board_fit_config_match()
  board: ti: am65x: Set fw_storage_interface and fw_dev_part ENVs

 arch/arm/dts/Makefile                         |   3 +-
 arch/arm/dts/k3-am654-icssg2.dtso             | 145 ++++
 arch/arm/dts/k3-am65x-binman.dtsi             |  65 +-
 board/ti/am65x/am65x.env                      |   4 +
 board/ti/am65x/evm.c                          |  11 +-
 configs/am65x_evm_a53_defconfig               |   2 +
 .../driver-model/fs_firmware_loader.rst       |   5 +-
 drivers/dma/ti/k3-udma.c                      |  11 +-
 drivers/misc/fs_loader.c                      |   5 +-
 drivers/net/ti/Kconfig                        |   9 +
 drivers/net/ti/Makefile                       |   1 +
 drivers/net/ti/icss_mii_rt.h                  | 192 +++++
 drivers/net/ti/icssg_classifier.c             | 376 +++++++++
 drivers/net/ti/icssg_config.c                 | 463 +++++++++++
 drivers/net/ti/icssg_config.h                 | 195 +++++
 drivers/net/ti/icssg_prueth.c                 | 762 ++++++++++++++++++
 drivers/net/ti/icssg_prueth.h                 |  92 +++
 drivers/net/ti/icssg_queues.c                 |  51 ++
 drivers/net/ti/icssg_switch_map.h             | 209 +++++
 drivers/remoteproc/Kconfig                    |   1 +
 drivers/remoteproc/rproc-uclass.c             |  85 ++
 include/remoteproc.h                          |  35 +
 22 files changed, 2709 insertions(+), 13 deletions(-)
 create mode 100644 arch/arm/dts/k3-am654-icssg2.dtso
 create mode 100644 drivers/net/ti/icss_mii_rt.h
 create mode 100644 drivers/net/ti/icssg_classifier.c
 create mode 100644 drivers/net/ti/icssg_config.c
 create mode 100644 drivers/net/ti/icssg_config.h
 create mode 100644 drivers/net/ti/icssg_prueth.c
 create mode 100644 drivers/net/ti/icssg_prueth.h
 create mode 100644 drivers/net/ti/icssg_queues.c
 create mode 100644 drivers/net/ti/icssg_switch_map.h

base-commit: f28a77589e7505535a4eebdc7269df98f67dbe68
-- 
2.34.1