[PATCH net] i40e: Look up MAC address in Open Firmware or IDPROM

[Sowmini Varadhan]

This is the i40e equivalent of commit c762dff24c06 ("ixgbe: Look up MAC
address in Open Firmware or IDPROM").

As with that fix, attempt to look up the MAC address in Open Firmware
on systems that uspport it, and use IDPROM on SPARC if no OF address
is found.

Reviewed-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sowmini Varadhan <sowmini.varadhan@xxxxxxxxxx>
---
 drivers/net/ethernet/intel/i40e/i40e_common.c |   36 +++++++++++++++++++++++++
 1 files changed, 36 insertions(+), 0 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_common.c b/drivers/net/ethernet/intel/i40e/i40e_common.c
index 2d74c6e..53f804a 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_common.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_common.c
@@ -24,11 +24,23 @@
  *
  ******************************************************************************/
 
+#include <linux/etherdevice.h>
+#ifdef CONFIG_OF
+#include <linux/of_net.h>
+#endif
+#include <linux/pci.h>
+#include "i40e.h"
+
 #include "i40e_type.h"
 #include "i40e_adminq.h"
 #include "i40e_prototype.h"
 #include "i40e_virtchnl.h"
 
+#ifdef CONFIG_SPARC
+#include <asm/idprom.h>
+#include <asm/prom.h>
+#endif
+
 /**
  * i40e_set_mac_type - Sets MAC type
  * @hw: pointer to the HW structure
@@ -1008,6 +1020,27 @@ i40e_status i40e_aq_mac_address_write(struct i40e_hw *hw,
 	return status;
 }
 
+static int i40e_get_platform_mac_addr(struct i40e_hw *hw, u8 *mac_addr)
+{
+#ifdef CONFIG_OF
+	struct i40e_pf *pf = hw->back;
+	struct device_node *dp = pci_device_to_OF_node(pf->pdev);
+	const unsigned char *addr;
+
+	addr = of_get_mac_address(dp);
+	if (addr) {
+		ether_addr_copy(mac_addr, addr);
+		return 0;
+	}
+#endif /* CONFIG_OF */
+
+#ifdef CONFIG_SPARC
+	ether_addr_copy(mac_addr, idprom->id_ethaddr);
+	return 0;
+#endif /* CONFIG_SPARC */
+	return 1;
+}
+
 /**
  * i40e_get_mac_addr - get MAC address
  * @hw: pointer to the HW structure
@@ -1021,6 +1054,9 @@ i40e_status i40e_get_mac_addr(struct i40e_hw *hw, u8 *mac_addr)
 	i40e_status status;
 	u16 flags = 0;
 
+	if (!i40e_get_platform_mac_addr(hw, mac_addr))
+		return I40E_SUCCESS;
+
 	status = i40e_aq_mac_address_read(hw, &flags, &addrs, NULL);
 
 	if (flags & I40E_AQC_LAN_ADDR_VALID)
-- 
1.7.1

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