+
/*
* This file is part of the Palacios Virtual Machine Monitor developed
* by the V3VEE Project with funding from the United States National
* and the University of New Mexico. You can find out more at
* http://www.v3vee.org
*
- * Copyright (c) 2008, Lei Xia <lxia@northwestern.edu>
- * Copyright (c) 2008, Cui Zheng <cuizheng@cs.unm.edu>
- * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
+ * Copyright (c) 2010, Lei Xia <lxia@northwestern.edu>
+ * Copyright (c) 2010, Cui Zheng <cuizheng@cs.unm.edu>
+ * Copyright (c) 2010, The V3VEE Project <http://www.v3vee.org>
* All rights reserved.
*
* Author: Lei Xia <lxia@northwestern.edu>
- * Cui Zheng <cuizheng@cs.unm.edu>
+ * Cui Zheng <cuizheng@cs.unm.edu>
*
*
* This is free software. You are permitted to use,
#include <devices/lnx_virtio_pci.h>
#include <palacios/vm_guest_mem.h>
#include <palacios/vmm_sprintf.h>
-#include <palacios/vmm_vnet.h>
+#include <vnet/vnet.h>
#include <palacios/vmm_lock.h>
#include <palacios/vmm_util.h>
-
#include <devices/pci.h>
+#include <palacios/vmm_ethernet.h>
+#include <palacios/vmm_time.h>
-#ifndef CONFIG_DEBUG_VIRTIO_NET
+#ifndef V3_CONFIG_DEBUG_VIRTIO_NET
#undef PrintDebug
#define PrintDebug(fmt, args...)
#endif
-#define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
+#ifndef V3_CONFIG_VNET
+static int net_debug = 0;
+#endif
+
+#define TX_QUEUE_SIZE 4096
+#define RX_QUEUE_SIZE 4096
+#define CTRL_QUEUE_SIZE 64
+
+/* The feature bitmap for virtio nic
+ * from Linux */
+#define VIRTIO_NET_F_CSUM 0 /* Host handles pkts w/ partial csum */
+#define VIRTIO_NET_F_GUEST_CSUM 1 /* Guest handles pkts w/ partial csum */
+#define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */
+#define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */
+#define VIRTIO_NET_F_GUEST_TSO4 7 /* Guest can handle TSOv4 in. */
+#define VIRTIO_NET_F_GUEST_TSO6 8 /* Guest can handle TSOv6 in. */
+#define VIRTIO_NET_F_GUEST_ECN 9 /* Guest can handle TSO[6] w/ ECN in. */
+#define VIRTIO_NET_F_GUEST_UFO 10 /* Guest can handle UFO in. */
+#define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */
+#define VIRTIO_NET_F_HOST_TSO6 12 /* Host can handle TSOv6 in. */
+#define VIRTIO_NET_F_HOST_ECN 13 /* Host can handle TSO[6] w/ ECN in. */
+#define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */
+#define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */
+#define VIRTIO_NET_F_STATUS 16 /* virtio_net_config.status available */
+
+/* Port to get virtio config */
+#define VIRTIO_NET_CONFIG 20
+
#define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10))
-struct virtio_net_hdr {
- uint8_t flags;
+/* for gso_type in virtio_net_hdr */
+#define VIRTIO_NET_HDR_GSO_NONE 0
+#define VIRTIO_NET_HDR_GSO_TCPV4 1 /* GSO frame, IPv4 TCP (TSO) */
+#define VIRTIO_NET_HDR_GSO_UDP 3 /* GSO frame, IPv4 UDP (UFO) */
+#define VIRTIO_NET_HDR_GSO_TCPV6 4 /* GSO frame, IPv6 TCP */
+#define VIRTIO_NET_HDR_GSO_ECN 0x80 /* TCP has ECN set */
+
+
+/* for flags in virtio_net_hdr */
+#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 /* Use csum_start, csum_offset */
-#define VIRTIO_NET_HDR_GSO_NONE 0 /* Not a GSO frame */
- uint8_t gso_type;
- uint16_t hdr_len; /* Ethernet + IP + tcp/udp hdrs */
- uint16_t gso_size; /* Bytes to append to hdr_len per frame */
- uint16_t csum_start; /* Position to start checksumming from */
- uint16_t csum_offset; /* Offset after that to place checksum */
+
+/* First element of the scatter-gather list, used with GSO or CSUM features */
+struct virtio_net_hdr
+{
+ uint8_t flags;
+ uint8_t gso_type;
+ uint16_t hdr_len; /* Ethernet + IP + tcp/udp hdrs */
+ uint16_t gso_size; /* Bytes to append to hdr_len per frame */
+ uint16_t csum_start; /* Position to start checksumming from */
+ uint16_t csum_offset; /* Offset after that to place checksum */
}__attribute__((packed));
-
-#define QUEUE_SIZE 1024
-#define CTRL_QUEUE_SIZE 64
-#define ETH_ALEN 6
+
+/* The header to use when the MRG_RXBUF
+ * feature has been negotiated. */
+struct virtio_net_hdr_mrg_rxbuf {
+ struct virtio_net_hdr hdr;
+ uint16_t num_buffers; /* Number of merged rx buffers */
+};
struct virtio_net_config
{
- uint8_t mac[ETH_ALEN]; //VIRTIO_NET_F_MAC
+ uint8_t mac[ETH_ALEN]; /* VIRTIO_NET_F_MAC */
uint16_t status;
} __attribute__((packed));
struct vm_device * pci_bus;
struct list_head dev_list;
struct v3_vm_info *vm;
+
+ uint8_t mac[ETH_ALEN];
};
struct virtio_net_state {
struct virtio_net_config net_cfg;
struct virtio_config virtio_cfg;
+ struct v3_vm_info * vm;
struct vm_device * dev;
struct pci_device * pci_dev;
int io_range_size;
+
+ uint16_t status;
- struct virtio_queue rx_vq; //index 0, rvq in Linux virtio driver, handle packet to guest
- struct virtio_queue tx_vq; //index 1, svq in Linux virtio driver, handle packet from guest
- struct virtio_queue ctrl_vq; //index 2, ctrol info from guest
+ struct virtio_queue rx_vq; /* idx 0*/
+ struct virtio_queue tx_vq; /* idx 1*/
+ struct virtio_queue ctrl_vq; /* idx 2*/
- ulong_t pkt_sent, pkt_recv, pkt_drop;
+ uint8_t mergeable_rx_bufs;
+
+ struct v3_timer * timer;
+ struct nic_statistics stats;
struct v3_dev_net_ops * net_ops;
+ v3_lock_t rx_lock, tx_lock;
- v3_lock_t lock;
+ uint8_t tx_notify, rx_notify;
+ uint32_t tx_pkts, rx_pkts;
+ uint64_t past_us;
void * backend_data;
struct virtio_dev_state * virtio_dev;
struct list_head dev_link;
};
-static int virtio_free(struct vm_device * dev)
-{
-
- return -1;
-}
static int virtio_init_state(struct virtio_net_state * virtio)
{
+ virtio->rx_vq.queue_size = RX_QUEUE_SIZE;
+ virtio->tx_vq.queue_size = TX_QUEUE_SIZE;
+ virtio->ctrl_vq.queue_size = CTRL_QUEUE_SIZE;
+
virtio->rx_vq.ring_desc_addr = 0;
virtio->rx_vq.ring_avail_addr = 0;
virtio->rx_vq.ring_used_addr = 0;
virtio->ctrl_vq.pfn = 0;
virtio->ctrl_vq.cur_avail_idx = 0;
- virtio->virtio_cfg.host_features = 0;
- //virtio->virtio_cfg.status = VIRTIO_NET_S_LINK_UP;
virtio->virtio_cfg.pci_isr = 0;
- if (v3_lock_init(&(virtio->lock)) == -1){
- PrintError("Virtio NIC: Failure to init lock for net_state\n");
+ virtio->mergeable_rx_bufs = 1;
+
+ virtio->virtio_cfg.host_features = 0 | (1 << VIRTIO_NET_F_MAC);
+ if(virtio->mergeable_rx_bufs) {
+ virtio->virtio_cfg.host_features |= (1 << VIRTIO_NET_F_MRG_RXBUF);
}
- virtio->pkt_sent = virtio->pkt_recv = virtio->pkt_drop = 0;
+ if ((v3_lock_init(&(virtio->rx_lock)) == -1) ||
+ (v3_lock_init(&(virtio->tx_lock)) == -1)){
+ PrintError("Virtio NIC: Failure to init locks for net_state\n");
+ }
return 0;
}
-static int pkt_tx(struct guest_info *core, struct virtio_net_state * virtio, struct vring_desc * buf_desc)
+static int tx_one_pkt(struct guest_info * core,
+ struct virtio_net_state * virtio,
+ struct vring_desc * buf_desc)
{
uint8_t * buf = NULL;
uint32_t len = buf_desc->length;
- PrintDebug("Virtio NIC: Virtio Pkt Sending, net_state: %p, pkt size: %d\n", virtio, len);
-
- if (guest_pa_to_host_va(core, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
- PrintError("Could not translate buffer address\n");
+ if (v3_gpa_to_hva(core, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
+ PrintDebug("Could not translate buffer address\n");
return -1;
}
+
+ V3_Net_Print(2, "Virtio-NIC: virtio_tx: size: %d\n", len);
+ if(net_debug >= 4){
+ v3_hexdump(buf, len, NULL, 0);
+ }
- if (virtio->net_ops->send(buf, len, virtio->backend_data, NULL) == -1) {
+ if(virtio->net_ops->send(buf, len, virtio->backend_data) < 0){
+ virtio->stats.tx_dropped ++;
return -1;
}
-
+
+ virtio->stats.tx_pkts ++;
+ virtio->stats.tx_bytes += len;
+
return 0;
}
-static int build_receive_header(struct virtio_net_hdr * hdr, const void * buf, int raw) {
- hdr->flags = 0;
-
- if (!raw) {
- memcpy(hdr, buf, sizeof(struct virtio_net_hdr));
- } else {
- memset(hdr, 0, sizeof(struct virtio_net_hdr));
- }
-
- return 0;
-}
-static int copy_data_to_desc(struct guest_info *core,
- struct virtio_net_state * virtio_state,
- struct vring_desc * desc,
- uchar_t * buf,
- uint_t buf_len)
-{
+/*copy data into ring buffer */
+static inline int copy_data_to_desc(struct guest_info * core,
+ struct virtio_net_state * virtio_state,
+ struct vring_desc * desc,
+ uchar_t * buf,
+ uint_t buf_len,
+ uint_t dst_offset){
uint32_t len;
uint8_t * desc_buf = NULL;
-
- if (guest_pa_to_host_va(core, desc->addr_gpa, (addr_t *)&(desc_buf)) == -1) {
- PrintError("Could not translate buffer address\n");
+
+ if (v3_gpa_to_hva(core, desc->addr_gpa, (addr_t *)&(desc_buf)) == -1) {
+ PrintDebug("Could not translate buffer address\n");
return -1;
}
- len = (desc->length < buf_len)?desc->length:buf_len;
- memcpy(desc_buf, buf, len);
+ len = (desc->length < (buf_len+dst_offset))?(desc->length - dst_offset):buf_len;
+ memcpy(desc_buf + dst_offset, buf, len);
return len;
}
-
-
-static int get_desc_count(struct virtio_queue * q, int index) {
+static inline int get_desc_count(struct virtio_queue * q, int index) {
struct vring_desc * tmp_desc = &(q->desc[index]);
int cnt = 1;
return cnt;
}
-static int handle_ctrl(struct guest_info *core, struct virtio_net_state * dev) {
- return 0;
+static inline void enable_cb(struct virtio_queue *queue){
+ if(queue->used){
+ queue->used->flags &= ~ VRING_NO_NOTIFY_FLAG;
+ }
}
-static int handle_pkt_tx(struct guest_info *core, struct virtio_net_state * virtio_state)
+static inline void disable_cb(struct virtio_queue *queue) {
+ if(queue->used){
+ queue->used->flags |= VRING_NO_NOTIFY_FLAG;
+ }
+}
+
+static int handle_pkt_tx(struct guest_info * core,
+ struct virtio_net_state * virtio_state,
+ int quote)
{
- struct virtio_queue * q = &(virtio_state->tx_vq);
- struct virtio_net_hdr * hdr = NULL;
+ struct virtio_queue *q = &(virtio_state->tx_vq);
+ int txed = 0, left = 0;
+ unsigned long flags;
- PrintDebug("Virtio NIC: TX: running on cpu: %d\n", V3_Get_CPU());
+ if (!q->ring_avail_addr) {
+ return -1;
+ }
+ flags = v3_lock_irqsave(virtio_state->tx_lock);
while (q->cur_avail_idx != q->avail->index) {
+ struct virtio_net_hdr_mrg_rxbuf * hdr = NULL;
struct vring_desc * hdr_desc = NULL;
addr_t hdr_addr = 0;
uint16_t desc_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
int desc_cnt = get_desc_count(q, desc_idx);
- uint32_t req_len = 0;
- int i = 0;
+
+ if(desc_cnt != 2){
+ PrintError("VNIC: merged rx buffer not supported, desc_cnt %d\n", desc_cnt);
+ goto exit_error;
+ }
hdr_desc = &(q->desc[desc_idx]);
- if (guest_pa_to_host_va(core, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
+ if (v3_gpa_to_hva(core, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
PrintError("Could not translate block header address\n");
- return -1;
+ goto exit_error;
}
- hdr = (struct virtio_net_hdr*)hdr_addr;
+ hdr = (struct virtio_net_hdr_mrg_rxbuf *)hdr_addr;
desc_idx = hdr_desc->next;
- for (i = 0; i < desc_cnt - 1; i++) {
- struct vring_desc * buf_desc = &(q->desc[desc_idx]);
- if (pkt_tx(core, virtio_state, buf_desc) == -1) {
- PrintError("Error handling nic operation\n");
- return -1;
- }
+ V3_Net_Print(2, "Virtio NIC: TX hdr count : %d\n", hdr->num_buffers);
- req_len += buf_desc->length;
- desc_idx = buf_desc->next;
+ /* here we assumed that one ethernet pkt is not splitted into multiple buffer */
+ struct vring_desc * buf_desc = &(q->desc[desc_idx]);
+ if (tx_one_pkt(core, virtio_state, buf_desc) == -1) {
+ PrintError("Virtio NIC: Fails to send packet\n");
}
- virtio_state->pkt_sent ++;
-
- q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
- q->used->ring[q->used->index % q->queue_size].length = req_len; // What do we set this to????
- q->used->index++;
-
+ if(buf_desc->next & VIRTIO_NEXT_FLAG){
+ PrintError("Virtio NIC: TX more buffer need to read\n");
+ }
+
+ q->used->ring[q->used->index % q->queue_size].id =
+ q->avail->ring[q->cur_avail_idx % q->queue_size];
+
+ q->used->ring[q->used->index % q->queue_size].length =
+ buf_desc->length; /* What do we set this to???? */
+
+ q->used->index ++;
q->cur_avail_idx ++;
+
+ if(++txed >= quote && quote > 0){
+ left = (q->cur_avail_idx != q->avail->index);
+ break;
+ }
}
-
- if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
- v3_pci_raise_irq(virtio_state->virtio_dev->pci_bus, 0, virtio_state->pci_dev);
+
+ v3_unlock_irqrestore(virtio_state->tx_lock, flags);
+
+ if (txed && !(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
+ v3_pci_raise_irq(virtio_state->virtio_dev->pci_bus,
+ 0, virtio_state->pci_dev);
virtio_state->virtio_cfg.pci_isr = 0x1;
+ virtio_state->stats.rx_interrupts ++;
}
-#ifdef CONFIG_VNET_PROFILE
- if (virtio_state->pkt_sent % 10000 == 0)
- PrintError("Virtio NIC: sent: %ld, rxed: %ld, dropped: %ld\n",
- virtio_state->pkt_sent,
- virtio_state->pkt_recv,
- virtio_state->pkt_drop);
-
-#endif
+ if(txed > 0) {
+ V3_Net_Print(2, "Virtio Handle TX: txed pkts: %d, left %d\n", txed, left);
+ }
- return 0;
+ return left;
+
+ exit_error:
+
+ v3_unlock_irqrestore(virtio_state->tx_lock, flags);
+ return -1;
}
static int virtio_setup_queue(struct guest_info *core,
- struct virtio_net_state * virtio_state,
- struct virtio_queue * queue,
- addr_t pfn,
- addr_t page_addr) {
+ struct virtio_net_state * virtio_state,
+ struct virtio_queue * queue,
+ addr_t pfn, addr_t page_addr) {
queue->pfn = pfn;
queue->ring_desc_addr = page_addr;
// round up to next page boundary.
queue->ring_used_addr = (queue->ring_used_addr + 0xfff) & ~0xfff;
- if (guest_pa_to_host_va(core, queue->ring_desc_addr, (addr_t *)&(queue->desc)) == -1) {
+ if (v3_gpa_to_hva(core, queue->ring_desc_addr, (addr_t *)&(queue->desc)) == -1) {
PrintError("Could not translate ring descriptor address\n");
return -1;
}
- if (guest_pa_to_host_va(core, queue->ring_avail_addr, (addr_t *)&(queue->avail)) == -1) {
+ if (v3_gpa_to_hva(core, queue->ring_avail_addr, (addr_t *)&(queue->avail)) == -1) {
PrintError("Could not translate ring available address\n");
return -1;
}
- if (guest_pa_to_host_va(core, queue->ring_used_addr, (addr_t *)&(queue->used)) == -1) {
+ if (v3_gpa_to_hva(core, queue->ring_used_addr, (addr_t *)&(queue->used)) == -1) {
PrintError("Could not translate ring used address\n");
return -1;
}
return 0;
}
-static int virtio_io_write(struct guest_info *core, uint16_t port, void * src, uint_t length, void * private_data)
+static int virtio_io_write(struct guest_info *core,
+ uint16_t port, void * src,
+ uint_t length, void * private_data)
{
struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
int port_idx = port % virtio->io_range_size;
-
- PrintDebug("VIRTIO NIC %p Write for port %d (index=%d) len=%d, value=%x\n", private_data,
- port, port_idx, length, *(uint32_t *)src);
+ PrintDebug("VIRTIO NIC %p Write for port %d (index=%d) len=%d, value=%x\n",
+ private_data, port, port_idx,
+ length, *(uint32_t *)src);
switch (port_idx) {
case GUEST_FEATURES_PORT:
return -1;
}
virtio->virtio_cfg.guest_features = *(uint32_t *)src;
- PrintDebug("Setting Guest Features to %x\n", virtio->virtio_cfg.guest_features);
break;
case VRING_PG_NUM_PORT:
addr_t pfn = *(uint32_t *)src;
addr_t page_addr = (pfn << VIRTIO_PAGE_SHIFT);
uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
-
- PrintDebug("Virtio Write: pfn: %p, page_addr %p, queue_idx %d\n", (void *)pfn, (void *)page_addr, queue_idx);
-
switch (queue_idx) {
case 0:
- virtio_setup_queue(core, virtio, &virtio->rx_vq, pfn, page_addr);
+ virtio_setup_queue(core, virtio,
+ &virtio->rx_vq,
+ pfn, page_addr);
break;
case 1:
- virtio_setup_queue(core, virtio, &virtio->tx_vq, pfn, page_addr);
+ virtio_setup_queue(core, virtio,
+ &virtio->tx_vq,
+ pfn, page_addr);
+ if(virtio->tx_notify == 0){
+ disable_cb(&virtio->tx_vq);
+ }
+ virtio->status = 1;
break;
case 2:
- virtio_setup_queue(core, virtio, &virtio->ctrl_vq, pfn, page_addr);
+ virtio_setup_queue(core, virtio,
+ &virtio->ctrl_vq,
+ pfn, page_addr);
break;
default:
break;
case VRING_Q_SEL_PORT:
virtio->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
if (virtio->virtio_cfg.vring_queue_selector > 2) {
- PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
+ PrintError("Virtio NIC: wrong queue idx: %d\n",
virtio->virtio_cfg.vring_queue_selector);
return -1;
}
{
uint16_t queue_idx = *(uint16_t *)src;
if (queue_idx == 0){
- PrintDebug("receive queue notification 0, packet get by Guest\n");
+ /* receive queue refill */
+ virtio->stats.tx_interrupts ++;
} else if (queue_idx == 1){
- if (handle_pkt_tx(core, virtio) == -1) {
- PrintError("Could not handle NIC Notification\n");
+ if (handle_pkt_tx(core, virtio, 0) < 0) {
+ PrintError("Virtio NIC: Error to handle packet TX\n");
return -1;
}
+ virtio->stats.tx_interrupts ++;
} else if (queue_idx == 2){
- if (handle_ctrl(core, virtio) == -1) {
- PrintError("Could not handle NIC Notification\n");
- return -1;
- }
+ /* ctrl */
} else {
- PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
- queue_idx);
+ PrintError("Virtio NIC: Wrong queue index %d\n", queue_idx);
}
break;
}
case VIRTIO_STATUS_PORT:
virtio->virtio_cfg.status = *(uint8_t *)src;
if (virtio->virtio_cfg.status == 0) {
- PrintDebug("Resetting device\n");
virtio_init_state(virtio);
}
break;
case VIRTIO_ISR_PORT:
virtio->virtio_cfg.pci_isr = *(uint8_t *)src;
break;
+
default:
return -1;
break;
return length;
}
-static int virtio_io_read(struct guest_info *core, uint16_t port, void * dst, uint_t length, void * private_data)
+static int virtio_io_read(struct guest_info *core,
+ uint16_t port, void * dst,
+ uint_t length, void * private_data)
{
struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
int port_idx = port % virtio->io_range_size;
uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
- PrintDebug("Virtio NIC %p: Read for port %d (index =%d), length=%d\n", private_data,
- port, port_idx, length);
+ PrintDebug("Virtio NIC %p: Read for port 0x%x (index =%d), length=%d\n",
+ private_data, port, port_idx, length);
switch (port_idx) {
case HOST_FEATURES_PORT:
if (length != 4) {
- PrintError("Illegal read length for host features\n");
- return -1;
+ PrintError("Virtio NIC: Illegal read length for host features\n");
+ //return -1;
}
*(uint32_t *)dst = virtio->virtio_cfg.host_features;
break;
case VRING_PG_NUM_PORT:
if (length != 4) {
- PrintError("Illegal read length for page frame number\n");
+ PrintError("Virtio NIC: Illegal read length for page frame number\n");
return -1;
}
switch (queue_idx) {
case VRING_SIZE_PORT:
if (length != 2) {
- PrintError("Illegal read length for vring size\n");
+ PrintError("Virtio NIC: Illegal read length for vring size\n");
return -1;
}
switch (queue_idx) {
default:
break;
}
- PrintDebug("queue index: %d, value=0x%x\n", (int)queue_idx, *(uint16_t *)dst);
break;
case VIRTIO_STATUS_PORT:
if (length != 1) {
- PrintError("Illegal read length for status\n");
+ PrintError("Virtio NIC: Illegal read length for status\n");
return -1;
}
*(uint8_t *)dst = virtio->virtio_cfg.status;
case VIRTIO_ISR_PORT:
*(uint8_t *)dst = virtio->virtio_cfg.pci_isr;
virtio->virtio_cfg.pci_isr = 0;
- v3_pci_lower_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
+ v3_pci_lower_irq(virtio->virtio_dev->pci_bus,
+ 0, virtio->pci_dev);
+ break;
+
+ case VIRTIO_NET_CONFIG ... VIRTIO_NET_CONFIG + ETH_ALEN:
+ *(uint8_t *)dst = virtio->net_cfg.mac[port_idx-VIRTIO_NET_CONFIG];
break;
default:
- PrintError("Virtio NIC: Read of Unhandled Virtio Read\n");
+ PrintError("Virtio NIC: Read of Unhandled Virtio Read:%d\n",
+ port_idx);
return -1;
}
}
-
-
+/* receiving raw ethernet pkt from backend */
static int virtio_rx(uint8_t * buf, uint32_t size, void * private_data) {
struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
struct virtio_queue * q = &(virtio->rx_vq);
- struct virtio_net_hdr hdr;
- uint32_t hdr_len = sizeof(struct virtio_net_hdr);
- uint32_t data_len = size;
- uint32_t offset = 0;
+ struct virtio_net_hdr_mrg_rxbuf hdr;
unsigned long flags;
- int ret_val = -1;
- int raw = 1;
-
- flags = v3_lock_irqsave(virtio->lock);
-
- PrintDebug("VIRTIO NIC: RX on cpu %d to virtio nic %p, size:%d\n", V3_Get_CPU(), virtio, size);
+ uint8_t kick_guest = 0;
- virtio->pkt_recv ++;
+ V3_Net_Print(2, "Virtio NIC: virtio_rx: size: %d\n", size);
- if (!raw){
- data_len -= hdr_len;
+ if (!q->ring_avail_addr) {
+ V3_Net_Print(2, "Virtio NIC: RX Queue not set\n");
+ virtio->stats.rx_dropped ++;
+
+ return -1;
}
- build_receive_header(&hdr, buf, raw);
+ memset(&hdr, 0, sizeof(struct virtio_net_hdr_mrg_rxbuf));
- if (q->ring_avail_addr == 0) {
- PrintError("Queue is not set\n");
- goto exit;
- }
+ flags = v3_lock_irqsave(virtio->rx_lock);
if (q->cur_avail_idx != q->avail->index){
- addr_t hdr_addr = 0;
- uint16_t hdr_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
- uint16_t buf_idx = 0;
- struct vring_desc * hdr_desc = NULL;
-
- hdr_desc = &(q->desc[hdr_idx]);
- if (guest_pa_to_host_va(&(virtio->virtio_dev->vm->cores[0]), hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
- PrintError("Could not translate receive buffer address\n");
- ret_val = -1;
- goto exit;
- }
+ uint16_t buf_idx;
+ struct vring_desc * buf_desc;
+ uint32_t hdr_len, len;
+ uint32_t offset = 0;
+
+ hdr_len = (virtio->mergeable_rx_bufs)?
+ sizeof(struct virtio_net_hdr_mrg_rxbuf):
+ sizeof(struct virtio_net_hdr);
+
+ if(virtio->mergeable_rx_bufs){/* merged buffer */
+ struct vring_desc * hdr_desc;
+ uint16_t old_idx = q->cur_avail_idx;
+
+ buf_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
+ hdr_desc = &(q->desc[buf_idx]);
+
+ len = copy_data_to_desc(&(virtio->virtio_dev->vm->cores[0]),
+ virtio, hdr_desc, buf, size, hdr_len);
+ if(len < 0){
+ goto err_exit;
+ }
+ offset += len;
- memcpy((void *)hdr_addr, &hdr, sizeof(struct virtio_net_hdr));
- if (offset >= data_len) {
- hdr_desc->flags &= ~VIRTIO_NEXT_FLAG;
- }
+ q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
+ q->used->ring[q->used->index % q->queue_size].length = hdr_len + offset;
+ q->cur_avail_idx ++;
+ hdr.num_buffers ++;
+
+ while(offset < size) {
+ buf_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
+ buf_desc = &(q->desc[buf_idx]);
+
+ len = copy_data_to_desc(&(virtio->virtio_dev->vm->cores[0]),
+ virtio, buf_desc, buf+offset, size-offset, 0);
+ if (len < 0){
+ V3_Net_Print(2, "Virtio NIC: merged buffer, %d buffer size %d\n",
+ hdr.num_buffers, len);
+ q->cur_avail_idx = old_idx;
+ goto err_exit;
+ }
+ offset += len;
+ buf_desc->flags &= ~VIRTIO_NEXT_FLAG;
+
+ q->used->ring[(q->used->index + hdr.num_buffers) % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
+ q->used->ring[(q->used->index + hdr.num_buffers) % q->queue_size].length = len;
+ q->cur_avail_idx ++;
+
+ hdr.num_buffers ++;
+ }
- for (buf_idx = hdr_desc->next; offset < data_len; buf_idx = q->desc[hdr_idx].next) {
- struct vring_desc * buf_desc = &(q->desc[buf_idx]);
- uint32_t len = 0;
+ copy_data_to_desc(&(virtio->virtio_dev->vm->cores[0]),
+ virtio, hdr_desc, (uchar_t *)&hdr, hdr_len, 0);
+ q->used->index += hdr.num_buffers;
+ }else{
+ buf_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
+ buf_desc = &(q->desc[buf_idx]);
+
+ /* copy header */
+ len = copy_data_to_desc(&(virtio->virtio_dev->vm->cores[0]),
+ virtio, buf_desc, (uchar_t *)&(hdr.hdr), hdr_len, 0);
+ if(len < hdr_len){
+ V3_Net_Print(2, "Virtio NIC: rx copy header error %d, hdr_len %d\n",
+ len, hdr_len);
+ goto err_exit;
+ }
- len = copy_data_to_desc(&(virtio->virtio_dev->vm->cores[0]), virtio, buf_desc, buf + offset, data_len - offset);
+ len = copy_data_to_desc(&(virtio->virtio_dev->vm->cores[0]),
+ virtio, buf_desc, buf, size, hdr_len);
+ if(len < 0){
+ V3_Net_Print(2, "Virtio NIC: rx copy data error %d\n", len);
+ goto err_exit;
+ }
offset += len;
- if (offset < data_len) {
- buf_desc->flags = VIRTIO_NEXT_FLAG;
+
+ /* copy rest of data */
+ while(offset < size &&
+ (buf_desc->flags & VIRTIO_NEXT_FLAG)){
+ buf_desc = &(q->desc[buf_desc->next]);
+ len = copy_data_to_desc(&(virtio->virtio_dev->vm->cores[0]),
+ virtio, buf_desc, buf+offset, size-offset, 0);
+ if (len < 0) {
+ break;
+ }
+ offset += len;
}
- buf_desc->length = len;
- }
-
- q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
- q->used->ring[q->used->index % q->queue_size].length = data_len + hdr_len; // This should be the total length of data sent to guest (header+pkt_data)
- q->used->index++;
+ buf_desc->flags &= ~VIRTIO_NEXT_FLAG;
- q->cur_avail_idx++;
+ if(offset < size){
+ V3_Net_Print(2, "Virtio NIC: rx not enough ring buffer, buffer size %d\n",
+ len);
+ goto err_exit;
+ }
+
+ q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
+ q->used->ring[q->used->index % q->queue_size].length = size + hdr_len; /* This should be the total length of data sent to guest (header+pkt_data) */
+ q->used->index ++;
+ q->cur_avail_idx ++;
+ }
+
+ virtio->stats.rx_pkts ++;
+ virtio->stats.rx_bytes += size;
} else {
- virtio->pkt_drop++;
- goto exit;
+ V3_Net_Print(2, "Virtio NIC: Guest RX queue is full\n");
+ virtio->stats.rx_dropped ++;
+
+ /* kick guest to refill RX queue */
+ kick_guest = 1;
}
- if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
- PrintDebug("Raising IRQ %d\n", virtio->pci_dev->config_header.intr_line);
+ v3_unlock_irqrestore(virtio->rx_lock, flags);
+
+ if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG) || kick_guest) {
+ V3_Net_Print(2, "Virtio NIC: RX Raising IRQ %d\n",
+ virtio->pci_dev->config_header.intr_line);
+
+ virtio->virtio_cfg.pci_isr = 0x1;
v3_pci_raise_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
- virtio->virtio_cfg.pci_isr = 0x1;
+ virtio->stats.rx_interrupts ++;
}
- ret_val = offset;
-
-exit:
-
-#ifdef CONFIG_VNET_PROFILE
- if (virtio->pkt_recv % 10000 == 0)
- PrintError("Virtio NIC: sent: %ld, rxed: %ld, dropped: %ld\n",
- virtio->pkt_sent,
- virtio->pkt_recv,
- virtio->pkt_drop);
+ /* notify guest if it is in guest mode */
+ if((kick_guest || virtio->rx_notify == 1) &&
+ V3_Get_CPU() != virtio->virtio_dev->vm->cores[0].pcpu_id){
+ v3_interrupt_cpu(virtio->virtio_dev->vm,
+ virtio->virtio_dev->vm->cores[0].pcpu_id,
+ 0);
+ }
-#endif
+ return 0;
- v3_unlock_irqrestore(virtio->lock, flags);
+err_exit:
+ virtio->stats.rx_dropped ++;
+ v3_unlock_irqrestore(virtio->rx_lock, flags);
- return ret_val;
+ return -1;
+}
+
+static int virtio_free(struct virtio_dev_state * virtio) {
+ struct virtio_net_state * backend = NULL;
+ struct virtio_net_state * tmp = NULL;
+
+
+ list_for_each_entry_safe(backend, tmp, &(virtio->dev_list), dev_link) {
+
+ // unregister from PCI
+
+ list_del(&(backend->dev_link));
+ V3_Free(backend);
+ }
+
+ V3_Free(virtio);
+ return 0;
}
static struct v3_device_ops dev_ops = {
- .free = virtio_free,
- .reset = NULL,
- .start = NULL,
- .stop = NULL,
+ .free = (int (*)(void *))virtio_free,
};
-static int register_dev(struct virtio_dev_state * virtio, struct virtio_net_state * net_state)
+
+static int virtio_poll(int quote, void * data){
+ struct virtio_net_state * virtio = (struct virtio_net_state *)data;
+
+ if (virtio->status) {
+
+ return handle_pkt_tx(&(virtio->vm->cores[0]), virtio, quote);
+ }
+
+ return 0;
+}
+
+static int register_dev(struct virtio_dev_state * virtio,
+ struct virtio_net_state * net_state)
{
struct pci_device * pci_dev = NULL;
struct v3_pci_bar bars[6];
int tmp_ports = num_ports;
int i;
- // This gets the number of ports, rounded up to a power of 2
- net_state->io_range_size = 1; // must be a power of 2
+ /* This gets the number of ports, rounded up to a power of 2 */
+ net_state->io_range_size = 1;
while (tmp_ports > 0) {
tmp_ports >>= 1;
net_state->io_range_size <<= 1;
}
- // this is to account for any low order bits being set in num_ports
- // if there are none, then num_ports was already a power of 2 so we shift right to reset it
+ /* this is to account for any low order bits being set in num_ports
+ * if there are none, then num_ports was already a power of 2 so we shift right to reset it
+ */
if ((num_ports & ((net_state->io_range_size >> 1) - 1)) == 0) {
net_state->io_range_size >>= 1;
}
bars[i].type = PCI_BAR_NONE;
}
- PrintDebug("Virtio-NIC io_range_size = %d\n", net_state->io_range_size);
+ PrintDebug("Virtio NIC: io_range_size = %d\n",
+ net_state->io_range_size);
bars[0].type = PCI_BAR_IO;
bars[0].default_base_port = -1;
pci_dev->config_header.intr_pin = 1;
pci_dev->config_header.max_latency = 1; // ?? (qemu does it...)
- net_state->pci_dev = pci_dev;
- net_state->virtio_cfg.host_features = 0; //no features support now
- net_state->rx_vq.queue_size = QUEUE_SIZE;
- net_state->tx_vq.queue_size = QUEUE_SIZE;
- net_state->ctrl_vq.queue_size = CTRL_QUEUE_SIZE;
+ net_state->pci_dev = pci_dev;
net_state->virtio_dev = virtio;
-
+
+ memcpy(net_state->net_cfg.mac, virtio->mac, 6);
+
virtio_init_state(net_state);
+ V3_Print("Virtio NIC: Registered Intr Line %d\n", pci_dev->config_header.intr_line);
+
+ /* Add backend to list of devices */
+ list_add(&(net_state->dev_link), &(virtio->dev_list));
+
return 0;
}
+#define RATE_UPPER_THRESHOLD 10 /* 10000 pkts per second, around 100Mbits */
+#define RATE_LOWER_THRESHOLD 1
+#define PROFILE_PERIOD 10000 /*us*/
+
+static void virtio_nic_timer(struct guest_info * core,
+ uint64_t cpu_cycles, uint64_t cpu_freq,
+ void * priv_data) {
+ struct virtio_net_state * net_state = (struct virtio_net_state *)priv_data;
+ uint64_t period_us;
+ static int profile_ms = 0;
+
+ if(!net_state->status){ /* VNIC is not in working status */
+ return;
+ }
+
+ period_us = (1000*cpu_cycles)/cpu_freq;
+ net_state->past_us += period_us;
+
+ if(net_state->past_us > PROFILE_PERIOD){
+ uint32_t tx_rate, rx_rate;
+
+ tx_rate = (net_state->stats.tx_pkts - net_state->tx_pkts)/(net_state->past_us/1000); /* pkts/per ms */
+ rx_rate = (net_state->stats.rx_pkts - net_state->rx_pkts)/(net_state->past_us/1000);
+
+ net_state->tx_pkts = net_state->stats.tx_pkts;
+ net_state->rx_pkts = net_state->stats.rx_pkts;
+
+ if(tx_rate > RATE_UPPER_THRESHOLD && net_state->tx_notify == 1){
+ V3_Print("Virtio NIC: Switch TX to VMM driven mode\n");
+ disable_cb(&(net_state->tx_vq));
+ net_state->tx_notify = 0;
+ }
+
+ if(tx_rate < RATE_LOWER_THRESHOLD && net_state->tx_notify == 0){
+ V3_Print("Virtio NIC: Switch TX to Guest driven mode\n");
+ enable_cb(&(net_state->tx_vq));
+ net_state->tx_notify = 1;
+ }
+
+ if(rx_rate > RATE_UPPER_THRESHOLD && net_state->rx_notify == 1){
+ V3_Print("Virtio NIC: Switch RX to VMM None notify mode\n");
+ net_state->rx_notify = 0;
+ }
+
+ if(rx_rate < RATE_LOWER_THRESHOLD && net_state->rx_notify == 0){
+ V3_Print("Virtio NIC: Switch RX to VMM notify mode\n");
+ net_state->rx_notify = 1;
+ }
+
+ net_state->past_us = 0;
+ }
+
+ profile_ms += period_us/1000;
+ if(profile_ms > 20000){
+ V3_Net_Print(1, "Virtio NIC: TX: Pkt: %lld, Bytes: %lld\n\t\tRX Pkt: %lld. Bytes: %lld\n\t\tDropped: tx %lld, rx %lld\nInterrupts: tx %d, rx %d\nTotal Exit: %lld\n",
+ net_state->stats.tx_pkts, net_state->stats.tx_bytes,
+ net_state->stats.rx_pkts, net_state->stats.rx_bytes,
+ net_state->stats.tx_dropped, net_state->stats.rx_dropped,
+ net_state->stats.tx_interrupts, net_state->stats.rx_interrupts,
+ net_state->vm->cores[0].num_exits);
+ profile_ms = 0;
+ }
+}
+
+static struct v3_timer_ops timer_ops = {
+ .update_timer = virtio_nic_timer,
+};
+
+
static int connect_fn(struct v3_vm_info * info,
void * frontend_data,
struct v3_dev_net_ops * ops,
memset(net_state, 0, sizeof(struct virtio_net_state));
register_dev(virtio, net_state);
+ net_state->vm = info;
net_state->net_ops = ops;
net_state->backend_data = private_data;
+ net_state->virtio_dev = virtio;
+
+ net_state->tx_notify = 1;
+ net_state->rx_notify = 1;
+
+ net_state->timer = v3_add_timer(&(info->cores[0]),
+ &timer_ops,net_state);
ops->recv = virtio_rx;
- ops->frontend_data = net_state;
+ ops->poll = virtio_poll;
+ ops->config.frontend_data = net_state;
+ ops->config.poll = 1;
+ ops->config.quote = 64;
+ ops->config.fnt_mac = V3_Malloc(ETH_ALEN);
+ memcpy(ops->config.fnt_mac, virtio->mac, ETH_ALEN);
return 0;
}
static int virtio_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
struct vm_device * pci_bus = v3_find_dev(vm, v3_cfg_val(cfg, "bus"));
struct virtio_dev_state * virtio_state = NULL;
- char * name = v3_cfg_val(cfg, "name");
-
- PrintDebug("Virtio NIC: Initializing VIRTIO Network device: %s\n", name);
+ char * dev_id = v3_cfg_val(cfg, "ID");
+ char macstr[128];
+ char * str = v3_cfg_val(cfg, "mac");
+ memcpy(macstr, str, strlen(str));
if (pci_bus == NULL) {
- PrintError("Virtio NIC: VirtIO devices require a PCI Bus");
+ PrintError("Virtio NIC: Virtio device require a PCI Bus");
return -1;
}
virtio_state->pci_bus = pci_bus;
virtio_state->vm = vm;
- struct vm_device * dev = v3_allocate_device(name, &dev_ops, virtio_state);
- if (v3_attach_device(vm, dev) == -1) {
- PrintError("Virtio NIC: Could not attach device %s\n", name);
+ if (macstr != NULL && !str2mac(macstr, virtio_state->mac)) {
+ PrintDebug("Virtio NIC: Mac specified %s\n", macstr);
+ }else {
+ random_ethaddr(virtio_state->mac);
+ }
+
+ struct vm_device * dev = v3_add_device(vm, dev_id, &dev_ops, virtio_state);
+
+ if (dev == NULL) {
+ PrintError("Virtio NIC: Could not attach device %s\n", dev_id);
+ V3_Free(virtio_state);
return -1;
}
- if (v3_dev_add_net_frontend(vm, name, connect_fn, (void *)virtio_state) == -1) {
- PrintError("Virtio NIC: Could not register %s as net frontend\n", name);
+ if (v3_dev_add_net_frontend(vm, dev_id, connect_fn, (void *)virtio_state) == -1) {
+ PrintError("Virtio NIC: Could not register %s as net frontend\n", dev_id);
+ v3_remove_device(dev);
return -1;
}
