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Diffstat (limited to 'gpxe/src/drivers/net/virtio-net.c')
-rw-r--r--gpxe/src/drivers/net/virtio-net.c307
1 files changed, 0 insertions, 307 deletions
diff --git a/gpxe/src/drivers/net/virtio-net.c b/gpxe/src/drivers/net/virtio-net.c
deleted file mode 100644
index 49fcc1c5..00000000
--- a/gpxe/src/drivers/net/virtio-net.c
+++ /dev/null
@@ -1,307 +0,0 @@
-/* virtio-net.c - etherboot driver for virtio network interface
- *
- * (c) Copyright 2008 Bull S.A.S.
- *
- * Author: Laurent Vivier <Laurent.Vivier@bull.net>
- *
- * some parts from Linux Virtio PCI driver
- *
- * Copyright IBM Corp. 2007
- * Authors: Anthony Liguori <aliguori@us.ibm.com>
- *
- * some parts from Linux Virtio Ring
- *
- * Copyright Rusty Russell IBM Corporation 2007
- *
- * This work is licensed under the terms of the GNU GPL, version 2 or later.
- * See the COPYING file in the top-level directory.
- *
- *
- */
-
-#include "etherboot.h"
-#include "nic.h"
-#include "gpxe/virtio-ring.h"
-#include "gpxe/virtio-pci.h"
-#include "virtio-net.h"
-
-#define BUG() do { \
- printf("BUG: failure at %s:%d/%s()!\n", \
- __FILE__, __LINE__, __FUNCTION__); \
- while(1); \
-} while (0)
-#define BUG_ON(condition) do { if (condition) BUG(); } while (0)
-
-/* Ethernet header */
-
-struct eth_hdr {
- unsigned char dst_addr[ETH_ALEN];
- unsigned char src_addr[ETH_ALEN];
- unsigned short type;
-};
-
-struct eth_frame {
- struct eth_hdr hdr;
- unsigned char data[ETH_FRAME_LEN];
-};
-
-/* TX: virtio header and eth buffer */
-
-static struct virtio_net_hdr tx_virtio_hdr;
-static struct eth_frame tx_eth_frame;
-
-/* RX: virtio headers and buffers */
-
-#define RX_BUF_NB 6
-static struct virtio_net_hdr rx_hdr[RX_BUF_NB];
-static unsigned char rx_buffer[RX_BUF_NB][ETH_FRAME_LEN];
-
-/* virtio queues and vrings */
-
-enum {
- RX_INDEX = 0,
- TX_INDEX,
- QUEUE_NB
-};
-
-static struct vring_virtqueue virtqueue[QUEUE_NB];
-
-/*
- * virtnet_disable
- *
- * Turn off ethernet interface
- *
- */
-
-static void virtnet_disable(struct nic *nic)
-{
- int i;
-
- for (i = 0; i < QUEUE_NB; i++) {
- vring_disable_cb(&virtqueue[i]);
- vp_del_vq(nic->ioaddr, i);
- }
- vp_reset(nic->ioaddr);
-}
-
-/*
- * virtnet_poll
- *
- * Wait for a frame
- *
- * return true if there is a packet ready to read
- *
- * nic->packet should contain data on return
- * nic->packetlen should contain length of data
- *
- */
-static int virtnet_poll(struct nic *nic, int retrieve)
-{
- unsigned int len;
- u16 token;
- struct virtio_net_hdr *hdr;
- struct vring_list list[2];
-
- if (!vring_more_used(&virtqueue[RX_INDEX]))
- return 0;
-
- if (!retrieve)
- return 1;
-
- token = vring_get_buf(&virtqueue[RX_INDEX], &len);
-
- BUG_ON(len > sizeof(struct virtio_net_hdr) + ETH_FRAME_LEN);
-
- hdr = &rx_hdr[token]; /* FIXME: check flags */
- len -= sizeof(struct virtio_net_hdr);
-
- nic->packetlen = len;
- memcpy(nic->packet, (char *)rx_buffer[token], nic->packetlen);
-
- /* add buffer to desc */
-
- list[0].addr = (char*)&rx_hdr[token];
- list[0].length = sizeof(struct virtio_net_hdr);
- list[1].addr = (char*)&rx_buffer[token];
- list[1].length = ETH_FRAME_LEN;
-
- vring_add_buf(&virtqueue[RX_INDEX], list, 0, 2, token, 0);
- vring_kick(nic->ioaddr, &virtqueue[RX_INDEX], 1);
-
- return 1;
-}
-
-/*
- *
- * virtnet_transmit
- *
- * Transmit a frame
- *
- */
-
-static void virtnet_transmit(struct nic *nic, const char *destaddr,
- unsigned int type, unsigned int len, const char *data)
-{
- struct vring_list list[2];
-
- /*
- * from http://www.etherboot.org/wiki/dev/devmanual :
- * "You do not need more than one transmit buffer."
- */
-
- /* FIXME: initialize header according to vp_get_features() */
-
- tx_virtio_hdr.flags = 0;
- tx_virtio_hdr.csum_offset = 0;
- tx_virtio_hdr.csum_start = 0;
- tx_virtio_hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE;
- tx_virtio_hdr.gso_size = 0;
- tx_virtio_hdr.hdr_len = 0;
-
- /* add ethernet frame into vring */
-
- BUG_ON(len > sizeof(tx_eth_frame.data));
-
- memcpy(tx_eth_frame.hdr.dst_addr, destaddr, ETH_ALEN);
- memcpy(tx_eth_frame.hdr.src_addr, nic->node_addr, ETH_ALEN);
- tx_eth_frame.hdr.type = htons(type);
- memcpy(tx_eth_frame.data, data, len);
-
- list[0].addr = (char*)&tx_virtio_hdr;
- list[0].length = sizeof(struct virtio_net_hdr);
- list[1].addr = (char*)&tx_eth_frame;
- list[1].length = ETH_FRAME_LEN;
-
- vring_add_buf(&virtqueue[TX_INDEX], list, 2, 0, 0, 0);
-
- vring_kick(nic->ioaddr, &virtqueue[TX_INDEX], 1);
-
- /*
- * http://www.etherboot.org/wiki/dev/devmanual
- *
- * "You should ensure the packet is fully transmitted
- * before returning from this routine"
- */
-
- while (!vring_more_used(&virtqueue[TX_INDEX])) {
- mb();
- udelay(10);
- }
-
- /* free desc */
-
- (void)vring_get_buf(&virtqueue[TX_INDEX], NULL);
-}
-
-static void virtnet_irq(struct nic *nic __unused, irq_action_t action)
-{
- switch ( action ) {
- case DISABLE :
- vring_disable_cb(&virtqueue[RX_INDEX]);
- vring_disable_cb(&virtqueue[TX_INDEX]);
- break;
- case ENABLE :
- vring_enable_cb(&virtqueue[RX_INDEX]);
- vring_enable_cb(&virtqueue[TX_INDEX]);
- break;
- case FORCE :
- break;
- }
-}
-
-static void provide_buffers(struct nic *nic)
-{
- int i;
- struct vring_list list[2];
-
- for (i = 0; i < RX_BUF_NB; i++) {
- list[0].addr = (char*)&rx_hdr[i];
- list[0].length = sizeof(struct virtio_net_hdr);
- list[1].addr = (char*)&rx_buffer[i];
- list[1].length = ETH_FRAME_LEN;
- vring_add_buf(&virtqueue[RX_INDEX], list, 0, 2, i, i);
- }
-
- /* nofify */
-
- vring_kick(nic->ioaddr, &virtqueue[RX_INDEX], i);
-}
-
-static struct nic_operations virtnet_operations = {
- .connect = dummy_connect,
- .poll = virtnet_poll,
- .transmit = virtnet_transmit,
- .irq = virtnet_irq,
-};
-
-/*
- * virtnet_probe
- *
- * Look for a virtio network adapter
- *
- */
-
-static int virtnet_probe(struct nic *nic, struct pci_device *pci)
-{
- u32 features;
- int i;
-
- /* Mask the bit that says "this is an io addr" */
-
- nic->ioaddr = pci->ioaddr & ~3;
-
- /* Copy IRQ from PCI information */
-
- nic->irqno = pci->irq;
-
- printf("I/O address 0x%08x, IRQ #%d\n", nic->ioaddr, nic->irqno);
-
- adjust_pci_device(pci);
-
- vp_reset(nic->ioaddr);
-
- features = vp_get_features(nic->ioaddr);
- if (features & (1 << VIRTIO_NET_F_MAC)) {
- vp_get(nic->ioaddr, offsetof(struct virtio_net_config, mac),
- nic->node_addr, ETH_ALEN);
- printf("MAC address ");
- for (i = 0; i < ETH_ALEN; i++) {
- printf("%02x%c", nic->node_addr[i],
- (i == ETH_ALEN - 1) ? '\n' : ':');
- }
- }
-
- /* initialize emit/receive queue */
-
- for (i = 0; i < QUEUE_NB; i++) {
- virtqueue[i].free_head = 0;
- virtqueue[i].last_used_idx = 0;
- memset((char*)&virtqueue[i].queue, 0, sizeof(virtqueue[i].queue));
- if (vp_find_vq(nic->ioaddr, i, &virtqueue[i]) == -1)
- printf("Cannot register queue #%d\n", i);
- }
-
- /* provide some receive buffers */
-
- provide_buffers(nic);
-
- /* define NIC interface */
-
- nic->nic_op = &virtnet_operations;
-
- /* driver is ready */
-
- vp_set_features(nic->ioaddr, features & (1 << VIRTIO_NET_F_MAC));
- vp_set_status(nic->ioaddr, VIRTIO_CONFIG_S_DRIVER | VIRTIO_CONFIG_S_DRIVER_OK);
-
- return 1;
-}
-
-static struct pci_device_id virtnet_nics[] = {
-PCI_ROM(0x1af4, 0x1000, "virtio-net", "Virtio Network Interface", 0),
-};
-
-PCI_DRIVER ( virtnet_driver, virtnet_nics, PCI_NO_CLASS );
-
-DRIVER ( "VIRTIO-NET", nic_driver, pci_driver, virtnet_driver,
- virtnet_probe, virtnet_disable );
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