1 files changed, 157 insertions, 0 deletions

diff --git a/contrib/syslinux-4.02/gpxe/src/drivers/net/legacy.c b/contrib/syslinux-4.02/gpxe/src/drivers/net/legacy.c
new file mode 100644
index 0000000..79b3580
--- /dev/null
+++ b/contrib/syslinux-4.02/gpxe/src/drivers/net/legacy.c
@@ -0,0 +1,157 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <errno.h>
+#include <gpxe/if_ether.h>
+#include <gpxe/netdevice.h>
+#include <gpxe/ethernet.h>
+#include <gpxe/iobuf.h>
+#include <nic.h>
+
+/*
+ * Quick and dirty compatibility layer
+ *
+ * This should allow old-API PCI drivers to at least function until
+ * they are updated.  It will not help non-PCI drivers.
+ *
+ * No drivers should rely on this code.  It will be removed asap.
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+struct nic nic;
+
+static int legacy_registered = 0;
+
+static int legacy_transmit ( struct net_device *netdev, struct io_buffer *iobuf ) {
+	struct nic *nic = netdev->priv;
+	struct ethhdr *ethhdr;
+
+	DBG ( "Transmitting %zd bytes\n", iob_len ( iobuf ) );
+	iob_pad ( iobuf, ETH_ZLEN );
+	ethhdr = iobuf->data;
+	iob_pull ( iobuf, sizeof ( *ethhdr ) );
+	nic->nic_op->transmit ( nic, ( const char * ) ethhdr->h_dest,
+				ntohs ( ethhdr->h_protocol ),
+				iob_len ( iobuf ), iobuf->data );
+	netdev_tx_complete ( netdev, iobuf );
+	return 0;
+}
+
+static void legacy_poll ( struct net_device *netdev ) {
+	struct nic *nic = netdev->priv;
+	struct io_buffer *iobuf;
+
+	iobuf = alloc_iob ( ETH_FRAME_LEN );
+	if ( ! iobuf )
+		return;
+
+	nic->packet = iobuf->data;
+	if ( nic->nic_op->poll ( nic, 1 ) ) {
+		DBG ( "Received %d bytes\n", nic->packetlen );
+		iob_put ( iobuf, nic->packetlen );
+		netdev_rx ( netdev, iobuf );
+	} else {
+		free_iob ( iobuf );
+	}
+}
+
+static int legacy_open ( struct net_device *netdev __unused ) {
+	/* Nothing to do */
+	return 0;
+}
+
+static void legacy_close ( struct net_device *netdev __unused ) {
+	/* Nothing to do */
+}
+
+static void legacy_irq ( struct net_device *netdev __unused, int enable ) {
+	struct nic *nic = netdev->priv;
+
+	nic->nic_op->irq ( nic, ( enable ? ENABLE : DISABLE ) );
+}
+
+static struct net_device_operations legacy_operations = {
+	.open		= legacy_open,
+	.close		= legacy_close,
+	.transmit	= legacy_transmit,
+	.poll		= legacy_poll,
+	.irq   		= legacy_irq,
+};
+
+int legacy_probe ( void *hwdev,
+		   void ( * set_drvdata ) ( void *hwdev, void *priv ),
+		   struct device *dev,
+		   int ( * probe ) ( struct nic *nic, void *hwdev ),
+		   void ( * disable ) ( struct nic *nic, void *hwdev ) ) {
+	struct net_device *netdev;
+	int rc;
+
+	if ( legacy_registered )
+		return -EBUSY;
+	
+	netdev = alloc_etherdev ( 0 );
+	if ( ! netdev )
+		return -ENOMEM;
+	netdev_init ( netdev, &legacy_operations );
+	netdev->priv = &nic;
+	memset ( &nic, 0, sizeof ( nic ) );
+	set_drvdata ( hwdev, netdev );
+	netdev->dev = dev;
+
+	nic.node_addr = netdev->hw_addr;
+	nic.irqno = dev->desc.irq;
+
+	if ( ! probe ( &nic, hwdev ) ) {
+		rc = -ENODEV;
+		goto err_probe;
+	}
+
+	/* Overwrite the IRQ number.  Some legacy devices set
+	 * nic->irqno to 0 in the probe routine to indicate that they
+	 * don't support interrupts; doing this allows the timer
+	 * interrupt to be used instead.
+	 */
+	dev->desc.irq = nic.irqno;
+
+	/* Mark as link up; legacy devices don't handle link state */
+	netdev_link_up ( netdev );
+
+	if ( ( rc = register_netdev ( netdev ) ) != 0 )
+		goto err_register;
+
+	/* Do not remove this message */
+	printf ( "WARNING: Using legacy NIC wrapper on %s\n",
+		 netdev->ll_protocol->ntoa ( nic.node_addr ) );
+
+	legacy_registered = 1;
+	return 0;
+
+ err_register:
+	disable ( &nic, hwdev );
+ err_probe:
+	netdev_nullify ( netdev );
+	netdev_put ( netdev );
+	return rc;
+}
+
+void legacy_remove ( void *hwdev,
+		     void * ( * get_drvdata ) ( void *hwdev ),
+		     void ( * disable ) ( struct nic *nic, void *hwdev ) ) {
+	struct net_device *netdev = get_drvdata ( hwdev );
+	struct nic *nic = netdev->priv;
+
+	unregister_netdev ( netdev );
+	disable ( nic, hwdev );
+	netdev_nullify ( netdev );
+	netdev_put ( netdev );
+	legacy_registered = 0;
+}
+
+int dummy_connect ( struct nic *nic __unused ) {
+	return 1;
+}
+
+void dummy_irq ( struct nic *nic __unused, irq_action_t irq_action __unused ) {
+	return;
+}