netxen: fix mac addr setup

For NX3031 mac addr should be read from firmware. mac addr in flash
is still valid, but can be overridden by firmware if running in
virtualization environment.

For old revisions, mac addr is retrieved directly from flash.
Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

drivers/net/netxen/netxen_nic.h

@@ -1615,7 +1615,8 @@ dma_watchdog_wakeup(struct netxen_adapter *adapter)
 
 
 int netxen_is_flash_supported(struct netxen_adapter *adapter);
-int netxen_get_flash_mac_addr(struct netxen_adapter *adapter, __le64 mac[]);
+int netxen_get_flash_mac_addr(struct netxen_adapter *adapter, __le64 *mac);
+int netxen_p3_get_mac_addr(struct netxen_adapter *adapter, __le64 *mac);
 extern void netxen_change_ringparam(struct netxen_adapter *adapter);
 extern int netxen_rom_fast_read(struct netxen_adapter *adapter, int addr,
 				int *valp);

drivers/net/netxen/netxen_nic_hw.c

@@ -733,31 +733,56 @@ static int netxen_get_flash_block(struct netxen_adapter *adapter, int base,
 	return 0;
 }
 
-int netxen_get_flash_mac_addr(struct netxen_adapter *adapter, __le64 mac[])
+int netxen_get_flash_mac_addr(struct netxen_adapter *adapter, __le64 *mac)
 {
-	__le32 *pmac = (__le32 *) & mac[0];
+	__le32 *pmac = (__le32 *) mac;
+	u32 offset;
 
-	if (netxen_get_flash_block(adapter,
-				   NETXEN_USER_START +
-				   offsetof(struct netxen_new_user_info,
-					    mac_addr),
-				   FLASH_NUM_PORTS * sizeof(u64), pmac) == -1) {
+	offset = NETXEN_USER_START +
+		offsetof(struct netxen_new_user_info, mac_addr) +
+		adapter->portnum * sizeof(u64);
+
+	if (netxen_get_flash_block(adapter, offset, sizeof(u64), pmac) == -1)
 		return -1;
-	}
+
 	if (*mac == cpu_to_le64(~0ULL)) {
+
+		offset = NETXEN_USER_START_OLD +
+			offsetof(struct netxen_user_old_info, mac_addr) +
+			adapter->portnum * sizeof(u64);
+
 		if (netxen_get_flash_block(adapter,
-					   NETXEN_USER_START_OLD +
-					   offsetof(struct netxen_user_old_info,
-						    mac_addr),
-					   FLASH_NUM_PORTS * sizeof(u64),
-					   pmac) == -1)
+					offset, sizeof(u64), pmac) == -1)
 			return -1;
+
 		if (*mac == cpu_to_le64(~0ULL))
 			return -1;
 	}
 	return 0;
 }
 
+int netxen_p3_get_mac_addr(struct netxen_adapter *adapter, __le64 *mac)
+{
+	uint32_t crbaddr, mac_hi, mac_lo;
+	int pci_func = adapter->ahw.pci_func;
+
+	crbaddr = CRB_MAC_BLOCK_START +
+		(4 * ((pci_func/2) * 3)) + (4 * (pci_func & 1));
+
+	adapter->hw_read_wx(adapter, crbaddr, &mac_lo, 4);
+	adapter->hw_read_wx(adapter, crbaddr+4, &mac_hi, 4);
+
+	mac_hi = cpu_to_le32(mac_hi);
+	mac_lo = cpu_to_le32(mac_lo);
+
+	if (pci_func & 1)
+		*mac = ((mac_lo >> 16) | ((u64)mac_hi << 16));
+	else
+		*mac = ((mac_lo) | ((u64)mac_hi << 32));
+
+	return 0;
+}
+
 #define CRB_WIN_LOCK_TIMEOUT 100000000
 
 static int crb_win_lock(struct netxen_adapter *adapter)

drivers/net/netxen/netxen_nic_main.c

@@ -501,6 +501,44 @@ static void netxen_init_msix_entries(struct netxen_adapter *adapter)
 		adapter->msix_entries[i].entry = i;
 }
 
+static int
+netxen_read_mac_addr(struct netxen_adapter *adapter)
+{
+	int i;
+	unsigned char *p;
+	__le64 mac_addr;
+	DECLARE_MAC_BUF(mac);
+	struct net_device *netdev = adapter->netdev;
+	struct pci_dev *pdev = adapter->pdev;
+
+	if (netxen_is_flash_supported(adapter) != 0)
+		return -EIO;
+
+	if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
+		if (netxen_p3_get_mac_addr(adapter, &mac_addr) != 0)
+			return -EIO;
+	} else {
+		if (netxen_get_flash_mac_addr(adapter, &mac_addr) != 0)
+			return -EIO;
+	}
+
+	p = (unsigned char *)&mac_addr;
+	for (i = 0; i < 6; i++)
+		netdev->dev_addr[i] = *(p + 5 - i);
+
+	memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
+
+	/* set station address */
+
+	if (!is_valid_ether_addr(netdev->perm_addr)) {
+		dev_warn(&pdev->dev, "Bad MAC address %s.\n",
+				print_mac(mac, netdev->dev_addr));
+	} else
+		adapter->macaddr_set(adapter, netdev->dev_addr);
+
+	return 0;
+}
+
 /*
  * netxen_nic_probe()
  *
@@ -529,10 +567,8 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	unsigned long mem_base, mem_len, db_base, db_len, pci_len0 = 0;
 	int i = 0, err;
 	int first_driver, first_boot;
-	__le64 mac_addr[FLASH_NUM_PORTS + 1];
 	u32 val;
 	int pci_func_id = PCI_FUNC(pdev->devfn);
-	DECLARE_MAC_BUF(mac);
 	struct netxen_legacy_intr_set *legacy_intrp;
 	uint8_t revision_id;
 
@@ -904,28 +940,9 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
 	INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
 
-	if (netxen_is_flash_supported(adapter) == 0 &&
-			netxen_get_flash_mac_addr(adapter, mac_addr) == 0) {
-		unsigned char *p;
-
-		p = (unsigned char *)&mac_addr[adapter->portnum];
-		netdev->dev_addr[0] = *(p + 5);
-		netdev->dev_addr[1] = *(p + 4);
-		netdev->dev_addr[2] = *(p + 3);
-		netdev->dev_addr[3] = *(p + 2);
-		netdev->dev_addr[4] = *(p + 1);
-		netdev->dev_addr[5] = *(p + 0);
-
-		memcpy(netdev->perm_addr, netdev->dev_addr,
-			netdev->addr_len);
-		if (!is_valid_ether_addr(netdev->perm_addr)) {
-			printk(KERN_ERR "%s: Bad MAC address %s.\n",
-					netxen_nic_driver_name,
-					print_mac(mac, netdev->dev_addr));
-		} else {
-			adapter->macaddr_set(adapter, netdev->dev_addr);
-		}
-	}
+	err = netxen_read_mac_addr(adapter);
+	if (err)
+		dev_warn(&pdev->dev, "failed to read mac addr\n");
 
 	netif_carrier_off(netdev);
 	netif_stop_queue(netdev);

drivers/net/netxen/netxen_nic_phan_reg.h

@@ -125,6 +125,8 @@
 #define CRB_SW_INT_MASK_2	   NETXEN_NIC_REG(0x1e4)
 #define CRB_SW_INT_MASK_3	   NETXEN_NIC_REG(0x1e8)
 
+#define CRB_MAC_BLOCK_START        NETXEN_CAM_RAM(0x1c0)
+
 /*
  * capabilities register, can be used to selectively enable/disable features
  * for backward compability