kernel/linux.git/drivers/net/ethernet/ti/Makefile, branch linux-7.0.y

net: ethernet: ti-cpsw: fix linking built-in code to modules

2026-05-23T11:08:36+00:00

[ Upstream commit df75bd552a8790e83d4aeb5f112050cf3dc687bf ] There are six variants of the cpsw driver, sharing various parts of the code: davinci-emac, cpsw, cpsw-switchdev, netcp, netcp_ethss and am65-cpsw-nuss. I noticed that this means some files can be linked into more than one loadable module, or even part of vmlinux but also linked into a loadable module, both of which mess up assumptions of the build system, and causes warnings: scripts/Makefile.build:279: cpsw_ale.o is added to multiple modules: ti-am65-cpsw-nuss ti_cpsw ti_cpsw_new scripts/Makefile.build:279: cpsw_priv.o is added to multiple modules: ti_cpsw ti_cpsw_new scripts/Makefile.build:279: cpsw_sl.o is added to multiple modules: ti-am65-cpsw-nuss ti_cpsw ti_cpsw_new scripts/Makefile.build:279: cpsw_ethtool.o is added to multiple modules: ti_cpsw ti_cpsw_new scripts/Makefile.build:279: davinci_cpdma.o is added to multiple modules: ti_cpsw ti_cpsw_new ti_davinci_emac Change this back to having separate modules for each portion that can be linked standalone, exporting symbols as needed: - ti-cpsw-common.ko now contains both cpsw-common.o and davinci_cpdma.o as they are always used together - ti-cpsw-priv.ko contains cpsw_priv.o, cpsw_sl.o and cpsw_ethtool.o, which are the core of the cpsw and cpsw-new drivers. - ti-cpsw-sl.ko contains the cpsw-sl.o object and is used on ti-am65-cpsw-nuss.ko in addition to the two other cpsw variants. - ti-cpsw-ale.o is the one standalone module that is used by all except davinci_emac. Each of these will be built-in if any of its users are built-in, otherwise it's a loadable module if there is at least one module using it. I did not bring back the separate Kconfig symbols for this, but just handle it using Makefile logic. Note: ideally this is something that Kbuild complains about, but usually we just notice when something using THIS_MODULE misbehaves in a way that a user notices. Fixes: 99f6297182729 ("net: ethernet: ti: cpsw: drop TI_DAVINCI_CPDMA config option") Link: https://lore.kernel.org/lkml/20240417084400.3034104-1-arnd@kernel.org/ Signed-off-by: Arnd Bergmann Link: https://patch.msgid.link/20260402184726.3746487-2-arnd@kernel.org Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin

net: ti: icssm-prueth: Add switchdev support for icssm_prueth driver

2026-02-05T02:12:00+00:00

Add support for offloading the RSTP switch feature to the PRU-ICSS subsystem by adding switchdev support. PRU-ICSS is capable of operating in RSTP switch mode with two external ports and one host port. PRUETH driver and firmware interface support will be added into icssm_prueth in the subsequent commits. Signed-off-by: Roger Quadros Signed-off-by: Andrew F. Davis Signed-off-by: Basharath Hussain Khaja Signed-off-by: Parvathi Pudi Reviewed-by: Simon Horman Link: https://patch.msgid.link/20260130124559.1182780-3-parvathi@couthit.com Signed-off-by: Jakub Kicinski

net: ti: icssm-prueth: Add helper functions to configure and maintain FDB

2026-02-05T02:12:00+00:00

Introduce helper functions to configure and maintain Forwarding Database (FDB) tables to aid with the switch mode feature for PRU-ICSS ports. The PRU-ICSS FDB is maintained such that it is always in sync with the Linux bridge driver FDB. The FDB is used by the driver to determine whether to flood a packet, received from the user plane, to both ports or direct it to a specific port using the flags in the FDB table entry. The FDB is implemented in two main components: the Index table and the MAC Address table. Adding, deleting, and maintaining entries are handled by the PRUETH driver. There are two types of entries: Dynamic: created from the received packets and are subject to aging. Static: created by the user and these entries never age out. 8-bit hash value obtained using the source MAC address is used to identify the index to the Index/Hash table. A bucket-based approach is used to collate source MAC addresses with the same hash value. The Index/Hash table holds the bucket index (16-bit value) and the number of entries in the bucket with the same hash value (16-bit value). This table can hold up to 256 entries, with each entry consuming 4 bytes of memory. The bucket index value points to the MAC address table indicating the start of MAC addresses having the same hash values. Each entry in the MAC Address table consists of: 1. 6 bytes of the MAC address, 2. 2-byte aging time, and 3. 1-byte each for port information and flags respectively. When a new entry is added to the FDB, the hash value is calculated using an XOR operation on the 6-byte MAC address. The result is used as an index into the Hash/Index table to check if any entries exist. If no entries are present, the first available empty slot in the MAC Address table is allocated to insert this MAC address. If entries with the same hash value are already present, the new MAC address entry is added to the MAC Address table in such a way that it ensures all entries are grouped together and sorted in ascending MAC address order. This approach helps efficiently manage FDB entries. Signed-off-by: Roger Quadros Signed-off-by: Andrew F. Davis Signed-off-by: Basharath Hussain Khaja Signed-off-by: Parvathi Pudi Reviewed-by: Simon Horman Link: https://patch.msgid.link/20260130124559.1182780-2-parvathi@couthit.com Signed-off-by: Jakub Kicinski

net: ti: icssm-prueth: Adds ICSSM Ethernet driver

2025-09-14T20:00:54+00:00

Updates Kernel configuration to enable PRUETH driver and its dependencies along with makefile changes to add the new PRUETH driver. Changes includes init and deinit of ICSSM PRU Ethernet driver including net dev registration and firmware loading for DUAL-MAC mode running on PRU-ICSS2 instance. Changes also includes link handling, PRU booting, default firmware loading and PRU stopping using existing remoteproc driver APIs. Reviewed-by: Mohan Reddy Putluru Signed-off-by: Roger Quadros Signed-off-by: Andrew F. Davis Signed-off-by: Basharath Hussain Khaja Signed-off-by: Parvathi Pudi Link: https://patch.msgid.link/20250912104741.528721-3-parvathi@couthit.com Signed-off-by: Jakub Kicinski

net: ti: icssg-prueth: Split out common object into module

2024-07-15T12:50:40+00:00

icssg_prueth.c and icssg_prueth_sr1.c drivers use multiple common .c files. These common objects are getting added to multiple modules. As a result when both drivers are enabled in .config, below warning is seen. drivers/net/ethernet/ti/Makefile: icssg/icssg_common.o is added to multiple modules: icssg-prueth icssg-prueth-sr1 drivers/net/ethernet/ti/Makefile: icssg/icssg_classifier.o is added to multiple modules: icssg-prueth icssg-prueth-sr1 drivers/net/ethernet/ti/Makefile: icssg/icssg_config.o is added to multiple modules: icssg-prueth icssg-prueth-sr1 drivers/net/ethernet/ti/Makefile: icssg/icssg_mii_cfg.o is added to multiple modules: icssg-prueth icssg-prueth-sr1 drivers/net/ethernet/ti/Makefile: icssg/icssg_stats.o is added to multiple modules: icssg-prueth icssg-prueth-sr1 drivers/net/ethernet/ti/Makefile: icssg/icssg_ethtool.o is added to multiple modules: icssg-prueth icssg-prueth-sr1 Fix this by building a new module (icssg.o) for all the common objects. Both the driver can then depend on this common module. Some APIs being exported have emac_ as the prefix which may result into confusion with other existing APIs with emac_ prefix, to avoid confusion, rename the APIs being exported with emac_ to icssg_ prefix. This also fixes below error seen when both drivers are built. ERROR: modpost: "icssg_queue_pop" [drivers/net/ethernet/ti/icssg-prueth-sr1.ko] undefined! ERROR: modpost: "icssg_queue_push" [drivers/net/ethernet/ti/icssg-prueth-sr1.ko] undefined! Reported-and-tested-by: Thorsten Leemhuis Closes: https://lore.kernel.org/oe-kbuild-all/202405182038.ncf1mL7Z-lkp@intel.com/ Fixes: 487f7323f39a ("net: ti: icssg-prueth: Add helper functions to configure FDB") Reviewed-by: Roger Quadros Signed-off-by: MD Danish Anwar Reviewed-by: Sai Krishna Signed-off-by: David S. Miller

net: ti: icssg-prueth: Add support for ICSSG switch firmware

2024-05-30T13:37:26+00:00

Add support for ICSSG switch firmware using existing Dual EMAC driver with switchdev. Limitations: VLAN offloading is limited to 0-256 IDs. MDB/FDB static entries are limited to 511 entries and different FDBs can hash to same bucket and thus may not completely offloaded Example assuming ETH1 and ETH2 as ICSSG2 interfaces: Switch to ICSSG Switch mode: ip link add name br0 type bridge ip link set dev eth1 master br0 ip link set dev eth2 master br0 ip link set dev br0 up bridge vlan add dev br0 vid 1 pvid untagged self Going back to Dual EMAC mode: ip link set dev br0 down ip link set dev eth1 nomaster ip link set dev eth2 nomaster ip link del name br0 type bridge By default, Dual EMAC firmware is loaded, and can be changed to switch mode by above steps Reviewed-by: Andrew Lunn Signed-off-by: MD Danish Anwar Signed-off-by: Paolo Abeni

net: ti: icssg-prueth: Add ICSSG Ethernet driver for AM65x SR1.0 platforms

2024-04-09T07:47:29+00:00

Add the PRUeth driver for the ICSSG subsystem found in AM65x SR1.0 devices. The main differences that set SR1.0 and SR2.0 apart are the missing TXPRU core in SR1.0, two extra DMA channels for management purposes and different firmware that needs to be configured accordingly. Based on the work of Roger Quadros, Vignesh Raghavendra and Grygorii Strashko in TI's 5.10 SDK [1]. [1]: https://git.ti.com/cgit/ti-linux-kernel/ti-linux-kernel/tree/?h=ti-linux-5.10.y Co-developed-by: Jan Kiszka Signed-off-by: Jan Kiszka Signed-off-by: Diogo Ivo Reviewed-by: MD Danish Anwar Signed-off-by: Paolo Abeni

net: ti: icssg-prueth: Move common functions into a separate file

2024-04-09T07:47:29+00:00

In order to allow code sharing between Silicon Revisions 1.0 and 2.0 move all functions that can be shared into a common file. This commit introduces no functional changes. Signed-off-by: Diogo Ivo Reviewed-by: MD Danish Anwar Signed-off-by: Paolo Abeni

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

2023-12-23T01:01:19+00:00

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 Reviewed-by: Vladimir Oltean Signed-off-by: David S. Miller

net: ethernet: am65-cpsw: Build am65-cpsw-qos only if required

2023-12-23T01:01:19+00:00

Build am65-cpsw-qos only if CONFIG_TI_AM65_CPSW_TAS is enabled. Signed-off-by: Roger Quadros Reviewed-by: Vladimir Oltean Signed-off-by: David S. Miller