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Miller" CC: , , , , Subject: [PATCH net-next v3 0/3] Introduce switch mode support for ICSSG driver Date: Wed, 27 Mar 2024 17:10:51 +0530 Message-ID: <20240327114054.1907278-1-danishanwar@ti.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-Patchwork-Delegate: kuba@kernel.org This series adds support for switch-mode for ICSSG driver. This series also introduces helper APIs to configure firmware maintained FDB (Forwarding Database) and VLAN tables. These APIs are later used by ICSSG driver in switch mode. Now the driver will boot by default in dual EMAC mode. When first ICSSG interface is added to bridge driver will still be in EMAC mode. As soon as second ICSSG interface is added to same bridge, switch-mode will be enabled and switch firmwares will be loaded to PRU cores. The driver will remain in dual EMAC mode if ICSSG interfaces are added to two different bridges or if two differnet interfaces (One ICSSG, one other) is added to the same bridge. We'll only enable is_switch_mode flag when two ICSSG interfaces are added to same bridge. We start in dual MAC mode. Let's say lan0 and lan1 are ICSSG interfaces ip link add name br0 type bridge ip link set lan0 master br0 At this point, we get a CHANGEUPPER event. Only one port is a member of the bridge, so we will still be in dual MAC mode. ip link set lan1 master br0 We get a second CHANGEUPPER event, the second interface lan1 is also ICSSG interface so we will set the is_switch_mode flag and when interfaces are brought up again, ICSSG switch firmwares will be loaded to PRU Cores. There are some other cases to consider as well. ip link add name br0 type bridge ip link add name br1 type bridge ip link set lan0 master br0 ip link set ppp0 master br0 Here we are adding lan0 (ICSSG) and ppp0 (non ICSSG) to same bridge, as they both are not ICSSG, we will still be running in dual EMAC mode. ip link set lan1 master br1 ip link set vpn0 master br1 Here we are adding lan1 (ICSSG) and vpn0 (non ICSSG) to same bridge, as they both are not ICSSG, we will still be running in dual EMAC mode. This is v2 of the series [1]. It addresses commenst made on v1 [1]. Changes from v2 [2] to v3: *) Dropped RFC tag. *) Used ether_addr_copy() instead of manually copying mac address using for loop in patch 1/3 as suggested by Andrew Lunn *) Added helper API icssg_fdb_setup() in patch 1/3 to reduce code duplication as suggested by Andrew Lunn *) In prueth_switchdev_stp_state_set() removed BR_STATE_LEARNING as learning without forwarding is not supported by ICSSG firmware. *) Used ether_addr_equal() wherever possible in patch 2/3 as suggested by Andrew Lunn *) Fixed typo "nit: s/prueth_switchdevice_nb/prueth_switchdev_nb/" in patch 2/3 as suggested by Simon Horman *) Squashed "#include "icssg_mii_rt.h" to patch 2/3 from patch 3/3 as suggested by Simon Horman *) Rebased on latest net-next/main. Changes from v1 to v2: *) Removed TAPRIO support patch from this series. *) Stopped using devlink for enabling switch-mode as suggested by Andrew L *) Added read_poll_timeout() in patch 1 / 3 as suggested by Andrew L. [1] https://lore.kernel.org/all/20230830110847.1219515-4-danishanwar@ti.com/ [2] https://lore.kernel.org/all/20240118071005.1514498-1-danishanwar@ti.com/ Thanks and Regards, Md Danish Anwar MD Danish Anwar (3): net: ti: icssg-prueth: Add helper functions to configure FDB net: ti: icssg-switch: Add switchdev based driver for ethernet switch support net: ti: icssg-prueth: Add support for ICSSG switch firmware drivers/net/ethernet/ti/Kconfig | 1 + drivers/net/ethernet/ti/Makefile | 3 +- drivers/net/ethernet/ti/icssg/icssg_config.c | 306 ++++++++++- drivers/net/ethernet/ti/icssg/icssg_config.h | 26 + drivers/net/ethernet/ti/icssg/icssg_prueth.c | 199 +++++++- drivers/net/ethernet/ti/icssg/icssg_prueth.h | 36 ++ .../net/ethernet/ti/icssg/icssg_switchdev.c | 477 ++++++++++++++++++ .../net/ethernet/ti/icssg/icssg_switchdev.h | 13 + 8 files changed, 1048 insertions(+), 13 deletions(-) create mode 100644 drivers/net/ethernet/ti/icssg/icssg_switchdev.c create mode 100644 drivers/net/ethernet/ti/icssg/icssg_switchdev.h base-commit: 237bb5f7f7f55ec5f773469a974c61a49c298625