[dpdk-dev] [PATCH 2/2] net/enetc: set random MAC in case no MAC for SI

[Gagandeep Singh]

for SGMII interfaces, there can be 0 value
written on MAC registers.
This patch set the random MAC address for those
interfaces.

Signed-off-by: Gagandeep Singh <g.si...@nxp.com>
---
 drivers/net/enetc/enetc_ethdev.c | 33 +++++++++++++++++++++++++++++++-
 1 file changed, 32 insertions(+), 1 deletion(-)

diff --git a/drivers/net/enetc/enetc_ethdev.c b/drivers/net/enetc/enetc_ethdev.c
index 4e978348c..cc8fdd051 100644
--- a/drivers/net/enetc/enetc_ethdev.c
+++ b/drivers/net/enetc/enetc_ethdev.c
@@ -4,6 +4,7 @@
 
 #include <stdbool.h>
 #include <rte_ethdev_pci.h>
+#include <rte_random.h>
 
 #include "enetc_logs.h"
 #include "enetc.h"
@@ -123,11 +124,21 @@ enetc_link_update(struct rte_eth_dev *dev, int 
wait_to_complete __rte_unused)
        return rte_eth_linkstatus_set(dev, &link);
 }
 
+static void
+print_ethaddr(const char *name, const struct ether_addr *eth_addr)
+{
+       char buf[ETHER_ADDR_FMT_SIZE];
+       ether_format_addr(buf, ETHER_ADDR_FMT_SIZE, eth_addr);
+       ENETC_PMD_INFO("%s%s\n", name, buf);
+}
+
 static int
 enetc_hardware_init(struct enetc_eth_hw *hw)
 {
        struct enetc_hw *enetc_hw = &hw->hw;
        uint32_t *mac = (uint32_t *)hw->mac.addr;
+       uint32_t high_mac = 0;
+       uint16_t low_mac = 0;
 
        PMD_INIT_FUNC_TRACE();
        /* Calculating and storing the base HW addresses */
@@ -138,8 +149,28 @@ enetc_hardware_init(struct enetc_eth_hw *hw)
        enetc_wr(enetc_hw, ENETC_SIMR, ENETC_SIMR_EN);
 
        *mac = (uint32_t)enetc_port_rd(enetc_hw, ENETC_PSIPMAR0(0));
+       high_mac = (uint32_t)*mac;
        mac++;
        *mac = (uint16_t)enetc_port_rd(enetc_hw, ENETC_PSIPMAR1(0));
+       low_mac = (uint16_t)*mac;
+
+       if ((high_mac | low_mac) == 0) {
+               char *first_byte;
+
+               ENETC_PMD_INFO("MAC is not available for this SI, "
+                              "set random MAC\n");
+               mac = (uint32_t *)hw->mac.addr;
+               *mac = (uint32_t)rte_rand();
+               first_byte = (char *)mac;
+               *first_byte &= 0xfe;    /* clear multicast bit */
+               *first_byte |= 0x02;    /* set local assignment bit (IEEE802) */
+
+               enetc_port_wr(enetc_hw, ENETC_PSIPMAR0(0), *mac);
+               mac++;
+               *mac = (uint16_t)rte_rand();
+               enetc_port_wr(enetc_hw, ENETC_PSIPMAR1(0), *mac);
+               print_ethaddr("New address: ", (const struct ether_addr 
*)hw->mac.addr);
+       }
 
        return 0;
 }
@@ -906,5 +937,5 @@ RTE_INIT(enetc_pmd_init_log)
 {
        enetc_logtype_pmd = rte_log_register("pmd.net.enetc");
        if (enetc_logtype_pmd >= 0)
-               rte_log_set_level(enetc_logtype_pmd, RTE_LOG_NOTICE);
+               rte_log_set_level(enetc_logtype_pmd, RTE_LOG_INFO);
 }
-- 
2.17.1