[dpdk-dev] [PATCH v2 18/41] net/mlx5: add get MAC

[Srikanth Kaka <srikanth.k@oneconvergence.com>]

MAC address is retrieved by making an IOCTL call

Signed-off-by: Srikanth Kaka <srikanth.k@oneconvergence.com>
Signed-off-by: Vag Singh <vag.singh@oneconvergence.com>
Signed-off-by: Anand Thulasiram <avelu@juniper.net>
---
 drivers/net/mlx5/freebsd/mlx5_ethdev_os.c | 88 +++++++++++++++++++++++
 1 file changed, 88 insertions(+)

diff --git a/drivers/net/mlx5/freebsd/mlx5_ethdev_os.c b/drivers/net/mlx5/freebsd/mlx5_ethdev_os.c
index ad53ec5968..9aa38de649 100644
--- a/drivers/net/mlx5/freebsd/mlx5_ethdev_os.c
+++ b/drivers/net/mlx5/freebsd/mlx5_ethdev_os.c
@@ -4,6 +4,9 @@
  */
 
 #include <stdio.h>
+#include <stdint.h>
+#include <net/if_media.h>
+#include <sys/ioctl.h>
 
 #include <ethdev_driver.h>
 
@@ -31,3 +34,88 @@ mlx5_get_ifname(const struct rte_eth_dev *dev, char (*ifname)[MLX5_NAMESIZE])
 	MLX5_ASSERT(priv->sh);
 	return mlx5_get_ifname_sysfs(priv->sh->ibdev_path, *ifname);
 }
+
+/**
+ * Perform ifreq ioctl() on associated netdev ifname.
+ *
+ * @param[in] ifname
+ *   Pointer to netdev name.
+ * @param req
+ *   Request number to pass to ioctl().
+ * @param[out] ifr
+ *   Interface request structure output buffer.
+ *
+ * @return
+ *   0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+static int
+mlx5_ifreq_by_ifname(const char *ifname, int req, struct ifreq *ifr)
+{
+	int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
+	int ret = 0;
+
+	if (sock == -1) {
+		rte_errno = errno;
+		return -rte_errno;
+	}
+	rte_strscpy(ifr->ifr_name, ifname, sizeof(ifr->ifr_name));
+	ret = ioctl(sock, req, ifr);
+	if (ret == -1) {
+		rte_errno = errno;
+		goto error;
+	}
+	close(sock);
+	return 0;
+error:
+	close(sock);
+	return -rte_errno;
+}
+
+/**
+ * Perform ifreq ioctl() on associated Ethernet device.
+ *
+ * @param[in] dev
+ *   Pointer to Ethernet device.
+ * @param req
+ *   Request number to pass to ioctl().
+ * @param[out] ifr
+ *   Interface request structure output buffer.
+ *
+ * @return
+ *   0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+static int
+mlx5_ifreq(const struct rte_eth_dev *dev, int req, struct ifreq *ifr)
+{
+	char ifname[sizeof(ifr->ifr_name)];
+	int ret;
+
+	ret = mlx5_get_ifname(dev, &ifname);
+	if (ret)
+		return -rte_errno;
+	return mlx5_ifreq_by_ifname(ifname, req, ifr);
+}
+
+/**
+ * Get MAC address by querying netdevice.
+ *
+ * @param[in] dev
+ *   Pointer to Ethernet device.
+ * @param[out] mac
+ *   MAC address output buffer.
+ *
+ * @return
+ *   0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+int
+mlx5_get_mac(struct rte_eth_dev *dev, uint8_t (*mac)[RTE_ETHER_ADDR_LEN])
+{
+	struct ifreq request;
+	int ret;
+
+	ret = mlx5_ifreq(dev, SIOCGHWADDR, &request);
+	if (ret)
+		return ret;
+	memcpy(mac, request.ifr_addr.sa_data, RTE_ETHER_ADDR_LEN);
+	return 0;
+}
-- 
2.30.2