[efi] Work around bugs in Emulex NII driver

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

src/drivers/net/efi/nii.c

@@ -575,9 +575,10 @@ static int nii_get_init_info ( struct nii_nic *nii,
  * Initialise UNDI
  *
  * @v nii		NII NIC
+ * @v flags		Flags
  * @ret rc		Return status code
  */
-static int nii_initialise ( struct nii_nic *nii ) {
+static int nii_initialise_flags ( struct nii_nic *nii, unsigned int flags ) {
 	PXE_CPB_INITIALIZE cpb;
 	PXE_DB_INITIALIZE db;
 	unsigned int op;
@@ -600,8 +601,7 @@ static int nii_initialise ( struct nii_nic *nii ) {
 	memset ( &db, 0, sizeof ( db ) );
 
 	/* Issue command */
-	op = NII_OP ( PXE_OPCODE_INITIALIZE,
-		      PXE_OPFLAGS_INITIALIZE_DO_NOT_DETECT_CABLE );
+	op = NII_OP ( PXE_OPCODE_INITIALIZE, flags );
 	if ( ( stat = nii_issue_cpb_db ( nii, op, &cpb, sizeof ( cpb ),
 					 &db, sizeof ( db ) ) ) < 0 ) {
 		rc = -EIO_STAT ( stat );
@@ -618,6 +618,36 @@ static int nii_initialise ( struct nii_nic *nii ) {
 	return rc;
 }
 
+/**
+ * Initialise UNDI
+ *
+ * @v nii		NII NIC
+ * @ret rc		Return status code
+ */
+static int nii_initialise ( struct nii_nic *nii ) {
+	unsigned int flags;
+
+	/* Initialise UNDI */
+	flags = PXE_OPFLAGS_INITIALIZE_DO_NOT_DETECT_CABLE;
+	return nii_initialise_flags ( nii, flags );
+}
+
+/**
+ * Initialise UNDI and detect cable
+ *
+ * @v nii		NII NIC
+ * @ret rc		Return status code
+ */
+static int nii_initialise_and_detect ( struct nii_nic *nii ) {
+	unsigned int flags;
+
+	/* Initialise UNDI and detect cable.  This is required to work
+	 * around bugs in some Emulex NII drivers.
+	 */
+	flags = PXE_OPFLAGS_INITIALIZE_DETECT_CABLE;
+	return nii_initialise_flags ( nii, flags );
+}
+
 /**
  * Shut down UNDI
  *
@@ -650,6 +680,7 @@ static void nii_shutdown ( struct nii_nic *nii ) {
 static int nii_get_station_address ( struct nii_nic *nii,
 				     struct net_device *netdev ) {
 	PXE_DB_STATION_ADDRESS db;
+	unsigned int op;
 	int stat;
 	int rc;
 
@@ -658,8 +689,9 @@ static int nii_get_station_address ( struct nii_nic *nii,
 		goto err_initialise;
 
 	/* Issue command */
-	if ( ( stat = nii_issue_db ( nii, PXE_OPCODE_STATION_ADDRESS, &db,
-				     sizeof ( db ) ) ) < 0 ) {
+	op = NII_OP ( PXE_OPCODE_STATION_ADDRESS,
+		      PXE_OPFLAGS_STATION_ADDRESS_READ );
+	if ( ( stat = nii_issue_db ( nii, op, &db, sizeof ( db ) ) ) < 0 ) {
 		rc = -EIO_STAT ( stat );
 		DBGC ( nii, "NII %s could not get station address: %s\n",
 		       nii->dev.name, strerror ( rc ) );
@@ -689,18 +721,25 @@ static int nii_get_station_address ( struct nii_nic *nii,
  */
 static int nii_set_station_address ( struct nii_nic *nii,
 				     struct net_device *netdev ) {
+	uint32_t implementation = nii->undi->Implementation;
 	PXE_CPB_STATION_ADDRESS cpb;
+	unsigned int op;
 	int stat;
 	int rc;
 
+	/* Fail if setting station address is unsupported */
+	if ( ! ( implementation & PXE_ROMID_IMP_STATION_ADDR_SETTABLE ) )
+		return -ENOTSUP;
+
 	/* Construct parameter block */
 	memset ( &cpb, 0, sizeof ( cpb ) );
 	memcpy ( cpb.StationAddr, netdev->ll_addr,
 		 netdev->ll_protocol->ll_addr_len );
 
 	/* Issue command */
-	if ( ( stat = nii_issue_cpb ( nii, PXE_OPCODE_STATION_ADDRESS,
-				      &cpb, sizeof ( cpb ) ) ) < 0 ) {
+	op = NII_OP ( PXE_OPCODE_STATION_ADDRESS,
+	              PXE_OPFLAGS_STATION_ADDRESS_WRITE );
+	if ( ( stat = nii_issue_cpb ( nii, op, &cpb, sizeof ( cpb ) ) ) < 0 ) {
 		rc = -EIO_STAT ( stat );
 		DBGC ( nii, "NII %s could not set station address: %s\n",
 		       nii->dev.name, strerror ( rc ) );
@@ -717,6 +756,7 @@ static int nii_set_station_address ( struct nii_nic *nii,
  * @ret rc		Return status code
  */
 static int nii_set_rx_filters ( struct nii_nic *nii ) {
+	uint32_t implementation = nii->undi->Implementation;
 	unsigned int flags;
 	unsigned int op;
 	int stat;
@@ -724,10 +764,13 @@ static int nii_set_rx_filters ( struct nii_nic *nii ) {
 
 	/* Construct receive filter set */
 	flags = ( PXE_OPFLAGS_RECEIVE_FILTER_ENABLE |
-		  PXE_OPFLAGS_RECEIVE_FILTER_UNICAST |
-		  PXE_OPFLAGS_RECEIVE_FILTER_BROADCAST |
-		  PXE_OPFLAGS_RECEIVE_FILTER_PROMISCUOUS |
-		  PXE_OPFLAGS_RECEIVE_FILTER_ALL_MULTICAST );
+		  PXE_OPFLAGS_RECEIVE_FILTER_UNICAST );
+	if ( implementation & PXE_ROMID_IMP_BROADCAST_RX_SUPPORTED )
+		flags |= PXE_OPFLAGS_RECEIVE_FILTER_BROADCAST;
+	if ( implementation & PXE_ROMID_IMP_PROMISCUOUS_RX_SUPPORTED )
+		flags |= PXE_OPFLAGS_RECEIVE_FILTER_PROMISCUOUS;
+	if ( implementation & PXE_ROMID_IMP_PROMISCUOUS_MULTICAST_RX_SUPPORTED )
+		flags |= PXE_OPFLAGS_RECEIVE_FILTER_ALL_MULTICAST;
 
 	/* Issue command */
 	op = NII_OP ( PXE_OPCODE_RECEIVE_FILTERS, flags );
@@ -752,6 +795,7 @@ static int nii_transmit ( struct net_device *netdev,
 			  struct io_buffer *iobuf ) {
 	struct nii_nic *nii = netdev->priv;
 	PXE_CPB_TRANSMIT cpb;
+	unsigned int op;
 	int stat;
 	int rc;
 
@@ -768,8 +812,10 @@ static int nii_transmit ( struct net_device *netdev,
 	cpb.MediaheaderLen = netdev->ll_protocol->ll_header_len;
 
 	/* Transmit packet */
-	if ( ( stat = nii_issue_cpb ( nii, PXE_OPCODE_TRANSMIT, &cpb,
-				      sizeof ( cpb ) ) ) < 0 ) {
+	op = NII_OP ( PXE_OPCODE_TRANSMIT,
+		      ( PXE_OPFLAGS_TRANSMIT_WHOLE |
+			PXE_OPFLAGS_TRANSMIT_DONT_BLOCK ) );
+	if ( ( stat = nii_issue_cpb ( nii, op, &cpb, sizeof ( cpb ) ) ) < 0 ) {
 		rc = -EIO_STAT ( stat );
 		DBGC ( nii, "NII %s could not transmit: %s\n",
 		       nii->dev.name, strerror ( rc ) );
@@ -924,8 +970,18 @@ static int nii_open ( struct net_device *netdev ) {
 	struct nii_nic *nii = netdev->priv;
 	int rc;
 
-	/* Initialise NIC */
-	if ( ( rc = nii_initialise ( nii ) ) != 0 )
+	/* Initialise NIC
+	 *
+	 * Some Emulex NII drivers have a bug which prevents packets
+	 * from being sent or received unless we specifically ask it
+	 * to detect cable presence during initialisation.  Work
+	 * around these buggy drivers by requesting cable detection at
+	 * this point, even though we don't care about link state here
+	 * (and would prefer to have the NIC initialise even if no
+	 * cable is present, to match the behaviour of all other iPXE
+	 * drivers).
+	 */
+	if ( ( rc = nii_initialise_and_detect ( nii ) ) != 0 )
 		goto err_initialise;
 
 	/* Attempt to set station address */