• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 101 subscribers
  • Views 995 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TDA4VM: Some questions about the IPC process for ethernet

AllenHsu
Intellectual 980 points
Part Number: TDA4VM

Currently, I trace the source code for the network transmission of A72.

According to the teaching file EthernetSwitch.pdf, I learned that A72 needs to control R5 through IPC in order to control CPSW_9G.

Could you remind me, which part of the code do these IPC actions under cpsw driver (drivers/net/ethernet/ti)?

  • 0
    TI__Mastermind 27743 points

    Hello AllenHsu,

    Below are relevant files in Linux repo used for using CPSW9G in Linux using Ethernet firmware running on R5.

    Please note that virtual mac driver uses, rpmsg-kdrv framework for communicating with EthFw.

    drivers\net\ethernet\ti\j721e-cpsw-virt-mac.c - virtual MAC implementation.

    drivers/rpmsg-kdrv/rpmsg_kdrv_switch.c - IPC abstraction layer 

    include/linux/rpmsg-remotedev/rpmsg-remotedev.h - header file containing required data structures.

    Let me know if any clarifications needed. Thanks.

  • 0 in reply to Prasad Jondhale
    Intellectual 980 points

    Hi Prasad Jondhale,

    Thank you for your reply.

    File rpmsg_kdrv_switch.c defines a number of registration functions and is provided to File j721e-cpsw-virt-mac.c for use.
    Then communicate to R5. Such as the following structure.

    Another question is, where is the position of the R5 (Ethernet firmware) code?
    Give me a path, thanks.

    drivers/rpmsg-kdrv/rpmsg_kdrv_switch.c 
    struct rpmsg_remotedev_eth_switch_ops switch_ops = {
    .get_fw_ver = rpmsg_kdrv_switch_get_fw_ver,
    .attach = rpmsg_kdrv_switch_attach,
    .attach_ext = rpmsg_kdrv_switch_attach_ext,
    .detach = rpmsg_kdrv_switch_detach,
    .get_tx_info = rpmsg_kdrv_switch_get_tx_info,
    .get_rx_info = rpmsg_kdrv_switch_get_rx_info,
    .get_mac = rpmsg_kdrv_switch_get_mac,
    .register_mac = rpmsg_kdrv_switch_register_mac,
    .unregister_mac = rpmsg_kdrv_switch_unregister_mac,
    .register_ipv4 = rpmsg_kdrv_switch_reg_ipv4,
    .unregister_ipv4 = rpmsg_kdrv_switch_unreg_ipv4,
    .ping = rpmsg_kdrv_switch_ping,
    .read_reg = rpmsg_kdrv_switch_reg_read,
    .dbg_dump_stats = rpmsg_kdrv_switch_c2s_dbg_dump_stats,
    };

  • 0 in reply to AllenHsu
    TI__Mastermind 27743 points

    Hello AllenHsu,

    The EthFw is available in following path in Processor SDK RTOS AUTO (PSDKRA) package.

    psdk_rtos_auto_j7_06_01_01_06\ethfw

    The remote configuration code is in below folder - 

    psdk_rtos_auto_j7_06_01_01_06\ethfw\ethremotecfg\server\src