Added a very quick and dirty compatibility layer, to allow

not-yet-updated drivers to at least function.

1 files changed, 104 insertions, 0 deletions

diff --git a/src/drivers/net/legacy.c b/src/drivers/net/legacy.c
new file mode 100644
index 00000000..1b36c0de
--- /dev/null
+++ b/src/drivers/net/legacy.c
@@ -0,0 +1,104 @@
+#include <stdint.h>
+#include <errno.h>
+#include <gpxe/if_ether.h>
+#include <gpxe/netdevice.h>
+#include <gpxe/ethernet.h>
+#include <gpxe/pkbuff.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.
+ *
+ */
+
+struct nic nic;
+
+static int legacy_transmit ( struct net_device *netdev, struct pk_buff *pkb ) {
+	struct nic *nic = netdev->priv;
+	struct ethhdr *ethhdr = pkb->data;
+
+	pkb_pull ( pkb, sizeof ( *ethhdr ) );
+	nic->nic_op->transmit ( nic, ( const char * ) ethhdr->h_dest,
+				ntohs ( ethhdr->h_protocol ),
+				pkb_len ( pkb ), pkb->data );
+	free_pkb ( pkb );
+	return 0;
+}
+
+static void legacy_poll ( struct net_device *netdev ) {
+	struct nic *nic = netdev->priv;
+	struct pk_buff *pkb;
+
+	pkb = alloc_pkb ( ETH_FRAME_LEN );
+	if ( ! pkb )
+		return;
+
+	nic->packet = pkb->data;
+	if ( nic->nic_op->poll ( nic, 1 ) ) {
+		pkb_put ( pkb, nic->packetlen );
+		netdev_rx ( netdev, pkb );
+	} else {
+		free_pkb ( pkb );
+	}
+}
+
+int legacy_probe ( struct pci_device *pci,
+		   const struct pci_device_id *id __unused,
+		   int ( * probe ) ( struct nic *nic,
+				     struct pci_device *pci ),
+		   void ( * disable ) ( struct nic *nic ) ) {
+	struct net_device *netdev;
+	int rc;
+	
+	netdev = alloc_etherdev ( 0 );
+	if ( ! netdev )
+		return -ENOMEM;
+	netdev->priv = &nic;
+	memset ( &nic, 0, sizeof ( nic ) );
+	pci_set_drvdata ( pci, netdev );
+
+	netdev->transmit = legacy_transmit;
+	netdev->poll = legacy_poll;
+	nic.node_addr = netdev->ll_addr;
+
+	if ( ! probe ( &nic, pci ) ) {
+		free_netdev ( netdev );
+		return -ENODEV;
+	}
+
+	if ( ( rc = register_netdev ( netdev ) ) != 0 ) {
+		disable ( &nic );
+		free_netdev ( netdev );
+		return rc;
+	}
+
+	return 0;
+}
+
+void legacy_remove ( struct pci_device *pci,
+		     void ( * disable ) ( struct nic *nic ) ) {
+	struct net_device *netdev = pci_get_drvdata ( pci );
+	struct nic *nic = netdev->priv;
+
+	unregister_netdev ( netdev );
+	disable ( nic );
+	free_netdev ( netdev );
+}
+
+void pci_fill_nic ( struct nic *nic, struct pci_device *pci ) {
+	nic->ioaddr = pci->ioaddr;
+	nic->irqno = pci->irq;
+}
+
+int dummy_connect ( struct nic *nic __unused ) {
+	return 1;
+}
+
+void dummy_irq ( struct nic *nic __unused, irq_action_t irq_action __unused ) {
+	return;
+}