[intelxl] Use admin queue to get port MAC address

Remove knowledge of the PRTPM_SA[HL] registers, and instead use the
admin queue to retrieve the MAC address.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/drivers/net/intelxl.c

@@ -44,47 +44,6 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
  *
  */
 
-/******************************************************************************
- *
- * MAC address
- *
- ******************************************************************************
- */
-
-/**
- * Fetch initial MAC address and maximum frame size
- *
- * @v intelxl		Intel device
- * @v netdev		Network device
- * @ret rc		Return status code
- */
-static int intelxl_fetch_mac ( struct intelxl_nic *intelxl,
-			       struct net_device *netdev ) {
-	union intelxl_receive_address mac;
-	uint32_t prtpm_sal;
-	uint32_t prtpm_sah;
-
-	/* Read NVM-loaded address */
-	prtpm_sal = readl ( intelxl->regs + INTELXL_PRTPM_SAL );
-	prtpm_sah = readl ( intelxl->regs + INTELXL_PRTPM_SAH );
-	mac.reg.low = cpu_to_le32 ( prtpm_sal );
-	mac.reg.high = cpu_to_le32 ( prtpm_sah );
-
-	/* Check that address is valid */
-	if ( ! is_valid_ether_addr ( mac.raw ) ) {
-		DBGC ( intelxl, "INTELXL %p has invalid MAC address (%s)\n",
-		       intelxl, eth_ntoa ( mac.raw ) );
-		return -ENOENT;
-	}
-
-	/* Copy MAC address */
-	DBGC ( intelxl, "INTELXL %p has autoloaded MAC address %s\n",
-	       intelxl, eth_ntoa ( mac.raw ) );
-	memcpy ( netdev->hw_addr, mac.raw, ETH_ALEN );
-
-	return 0;
-}
-
 /******************************************************************************
  *
  * MSI-X interrupts
@@ -528,6 +487,54 @@ static int intelxl_admin_shutdown ( struct intelxl_nic *intelxl ) {
 	return 0;
 }
 
+/**
+ * Get MAC address
+ *
+ * @v netdev		Network device
+ * @ret rc		Return status code
+ */
+static int intelxl_admin_mac_read ( struct net_device *netdev ) {
+	struct intelxl_nic *intelxl = netdev->priv;
+	struct intelxl_admin_descriptor *cmd;
+	struct intelxl_admin_mac_read_params *read;
+	union intelxl_admin_buffer *buf;
+	uint8_t *mac;
+	int rc;
+
+	/* Populate descriptor */
+	cmd = intelxl_admin_command_descriptor ( intelxl );
+	cmd->opcode = cpu_to_le16 ( INTELXL_ADMIN_MAC_READ );
+	cmd->flags = cpu_to_le16 ( INTELXL_ADMIN_FL_BUF );
+	cmd->len = cpu_to_le16 ( sizeof ( buf->mac_read ) );
+	read = &cmd->params.mac_read;
+	buf = intelxl_admin_command_buffer ( intelxl );
+	mac = buf->mac_read.pf;
+
+	/* Issue command */
+	if ( ( rc = intelxl_admin_command ( intelxl ) ) != 0 )
+		return rc;
+
+	/* Check that MAC address is present in response */
+	if ( ! ( read->valid & INTELXL_ADMIN_MAC_READ_VALID_LAN ) ) {
+		DBGC ( intelxl, "INTELXL %p has no MAC address\n", intelxl );
+		return -ENOENT;
+	}
+
+	/* Check that address is valid */
+	if ( ! is_valid_ether_addr ( mac ) ) {
+		DBGC ( intelxl, "INTELXL %p has invalid MAC address (%s)\n",
+		       intelxl, eth_ntoa ( mac ) );
+		return -ENOENT;
+	}
+
+	/* Copy MAC address */
+	DBGC ( intelxl, "INTELXL %p has MAC address %s\n",
+	       intelxl, eth_ntoa ( mac ) );
+	memcpy ( netdev->hw_addr, mac, ETH_ALEN );
+
+	return 0;
+}
+
 /**
  * Clear PXE mode
  *
@@ -1721,9 +1728,9 @@ static int intelxl_probe ( struct pci_device *pci ) {
 	if ( ( rc = intelxl_admin_promisc ( intelxl ) ) != 0 )
 		goto err_admin_promisc;
 
-	/* Fetch MAC address and maximum frame size */
+	/* Get MAC address */
-	if ( ( rc = intelxl_fetch_mac ( intelxl, netdev ) ) != 0 )
+	if ( ( rc = intelxl_admin_mac_read ( netdev ) ) != 0 )
-		goto err_fetch_mac;
+		goto err_admin_mac_read;
 
 	/* Configure queue register addresses */
 	intelxl->tx.reg = INTELXL_QTX ( intelxl->queue );
@@ -1756,7 +1763,7 @@ static int intelxl_probe ( struct pci_device *pci ) {
 
 	unregister_netdev ( netdev );
  err_register_netdev:
- err_fetch_mac:
+ err_admin_mac_read:
  err_admin_promisc:
  err_admin_vsi:
  err_admin_switch:

src/drivers/net/intelxl.h

@@ -145,6 +145,32 @@ struct intelxl_admin_shutdown_params {
 /** Driver is unloading */
 #define INTELXL_ADMIN_SHUTDOWN_UNLOADING 0x01
 
+/** Admin queue Manage MAC Address Read command */
+#define INTELXL_ADMIN_MAC_READ 0x0107
+
+/** Admin queue Manage MAC Address Read command parameters */
+struct intelxl_admin_mac_read_params {
+	/** Valid addresses */
+	uint8_t valid;
+	/** Reserved */
+	uint8_t reserved[15];
+} __attribute__ (( packed ));
+
+/** LAN MAC address is valid */
+#define INTELXL_ADMIN_MAC_READ_VALID_LAN 0x10
+
+/** Admin queue Manage MAC Address Read data buffer */
+struct intelxl_admin_mac_read_buffer {
+	/** Physical function MAC address */
+	uint8_t pf[ETH_ALEN];
+	/** Reserved */
+	uint8_t reserved[ETH_ALEN];
+	/** Port MAC address */
+	uint8_t port[ETH_ALEN];
+	/** Physical function wake-on-LAN MAC address */
+	uint8_t wol[ETH_ALEN];
+} __attribute__ (( packed ));
+
 /** Admin queue Clear PXE Mode command */
 #define INTELXL_ADMIN_CLEAR_PXE 0x0110
 
@@ -315,6 +341,8 @@ union intelxl_admin_params {
 	struct intelxl_admin_driver_params driver;
 	/** Shutdown command parameters */
 	struct intelxl_admin_shutdown_params shutdown;
+	/** Manage MAC Address Read command parameters */
+	struct intelxl_admin_mac_read_params mac_read;
 	/** Clear PXE Mode command parameters */
 	struct intelxl_admin_clear_pxe_params pxe;
 	/** Get Switch Configuration command parameters */
@@ -336,6 +364,8 @@ union intelxl_admin_params {
 union intelxl_admin_buffer {
 	/** Driver Version data buffer */
 	struct intelxl_admin_driver_buffer driver;
+	/** Manage MAC Address Read data buffer */
+	struct intelxl_admin_mac_read_buffer mac_read;
 	/** Get Switch Configuration data buffer */
 	struct intelxl_admin_switch_buffer sw;
 	/** Get VSI Parameters data buffer */
@@ -831,12 +861,6 @@ intelxl_init_ring ( struct intelxl_ring *ring, unsigned int count, size_t len,
 #define INTELXL_PRTGL_SAH 0x1e2140
 #define INTELXL_PRTGL_SAH_MFS(x)	( (x) << 16 )	/**< Max frame size */
 
-/** Physical Function MAC Address Low Register */
-#define INTELXL_PRTPM_SAL 0x1e4440
-
-/** Physical Function MAC Address High Register */
-#define INTELXL_PRTPM_SAH 0x1e44c0
-
 /** Receive address */
 union intelxl_receive_address {
 	struct {