[PATCH v3 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 support 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>
---
v2: andy shevchenko comments
v3: more andy shevchenko comments
 drivers/net/ethernet/intel/i40e/i40e_common.c |   30 +++++++++++++++++++++++++
 1 files changed, 30 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..3edfe19 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_common.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_common.c
@@ -24,6 +24,14 @@
  *
  ******************************************************************************/
 
+#include <linux/etherdevice.h>
+#include <linux/of_net.h>
+#include <linux/pci.h>
+#ifdef CONFIG_SPARC
+#include <asm/idprom.h>
+#include <asm/prom.h>
+#endif
+#include "i40e.h"
 #include "i40e_type.h"
 #include "i40e_adminq.h"
 #include "i40e_prototype.h"
@@ -1008,6 +1016,25 @@ 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)
+{
+	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;
+	}
+
+#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 +1048,9 @@ 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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