Commits
Wingman Kwok committed 031c5510439
net: prueth: Add TI PRUSS Ethernet driver support of HSR PRP
This patch adds the Ethernet driver support of HSR (High-availability
Seamless Redundancy) and PRP (Parallel Redundancy Protocol)
functionality on TI SoCs that support the aforementioned protocols
over PRUSS loaded with the appropriate PRU firmware.
Usage:
in u-boot env (note line continuation "\" for netargs):
setenv netargs 'setenv bootargs console=${console} ${optargs} \
root=/dev/nfs nfsroot=${serverip}:${rootpath},${nfsopts} rw ip=dhcp \
ti_prueth.pruss1_ethtype=${pruss1_ethtype} \
ti_prueth.pruss2_ethtype=${pruss2_ethtype}'
setenv pruss1_ethtype 1
setenv pruss2_ethtype 2
where prussX_ethtype value
0 => emac
1 => hsr
2 => prp
Missing ti_prueth.prussX_ethtype => emac for that pruss.
prueth driver allows run time change of protocols at PRU (without
rebooting the board). This is achieved using the ethtool -K command
support to change feature flag to either NETIF_F_HW_PRP_RX_OFFLOAD
for PRP offload and NETIF_F_HW_HSR_RX_OFFLOAD for HSR at the prueth
device and restart the interfaces. At ndo_open() the driver
determines the eth_type based on the feature flag and download
the appropriate protocol firmware at PRU and start the PRU. Before
starting PRU, driver also setup the OCMC and Shared RAM offsets to
do IPC with PRU in either direction. Driver is responsible inserting
the remote node MAC address in the Node Table maintained in the shared
RAM and also remove expired entries.
Signed-off-by: WingMan Kwok <w-kwok2@ti.com>
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Vitaly Andrianov <vitalya@ti.com>
Signed-off-by: Aaron Kramer <a-kramer@ti.com>