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nvethernet: Add nvidia,use-random-mac-addr DT property

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Adding support for generating the random MAC address
if nvidia,use-random-mac-addr is set with value 1.

Below property should be there insider ethernet DT nodes -
nvidia,use-random-mac-addr = <1>;

Recommendation is to use only for MODS setup.
This should not be enabled in the production DT.

Bug 5142789

Change-Id: I87db90685bb9769358eda4edc226b929ccdce67f
Signed-off-by: Bhadram Varka <vbhadram@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3317020
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: Srinivas Ramachandran <srinivasra@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Tested-by: Lovie Wang <loview@nvidia.com>
This commit is contained in:
Bhadram Varka
2025-03-11 05:48:43 +00:00
committed by Jon Hunter
parent 010cb686b0
commit 3edc4ff927
1 changed files with 5 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/net/ethernet/nvidia/nvethernet/ether_linux.c
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@@ -5384,6 +5384,7 @@ static int ether_get_mac_address(struct ether_priv_data *pdata)
unsigned char local_addr[ETH_ALEN] = {0};
/* Default choesn node property name for MAC address */
char str_mac_address[ETH_MAC_STR_LEN] = "nvidia,ether-mac";
unsigned int use_random_mac_addr = 0x0;
unsigned int offset = 0;
unsigned int mac_addr_idx = 0x0;
int ret = 0;
@@ -5415,6 +5416,9 @@ static int ether_get_mac_address(struct ether_priv_data *pdata)
sprintf(str_mac_address, "nvidia,ether-mac%d", offset);
}
if (of_property_read_u32(np, "nvidia,use-random-mac-addr", &use_random_mac_addr) < 0)
use_random_mac_addr = OSI_DISABLE;
ret = ether_get_mac_address_dtb("/chosen", str_mac_address, mac_addr);
/* If return value is valid update eth_mac_addr */
if (ret == 0) {
@@ -5430,8 +5434,7 @@ static int ether_get_mac_address(struct ether_priv_data *pdata)
ret = of_get_mac_address(np, addr);
if (ret < 0) {
dev_err(dev, "No Mac address local DT!\n");
//TBD: use local mac addr for T264 bring up
if (osi_core->pre_sil == OSI_ENABLE) {
if (use_random_mac_addr == OSI_ENABLE) {
dev_err(dev, "Using local random mac addr!\n");
eth_random_addr(local_addr);
addr = local_addr;