+
/*
* This file is part of the Palacios Virtual Machine Monitor developed
* by the V3VEE Project with funding from the United States National
#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))
+/* 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 */
-struct virtio_net_hdr {
- uint8_t flags;
-#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 */
+/* for flags in virtio_net_hdr */
+#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 /* Use csum_start, csum_offset */
+
+
+/* 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));
-/* This is the version of the header to use when the MRG_RXBUF
+/* 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_hdr hdr;
+ uint16_t num_buffers; /* Number of merged rx buffers */
};
-
-#define TX_QUEUE_SIZE 64
-#define RX_QUEUE_SIZE 1024
-#define CTRL_QUEUE_SIZE 64
-
-#define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */
-#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_HOST_TSO4 11 /* Host can handle TSOv4 in. */
-
-/* this is not how virtio supposed to be,
- * we may need a separately implemented virtio_pci
- * In order to make guest to get virtio MAC from host
- * I added it here -- Lei
- */
- #define VIRTIO_NET_CONFIG 20
-
-
struct virtio_net_config
{
uint8_t mac[ETH_ALEN]; /* VIRTIO_NET_F_MAC */
struct list_head dev_list;
struct v3_vm_info *vm;
- char mac[ETH_ALEN];
+ 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; /* idx 0, pkts to guest */
- struct virtio_queue tx_vq; /* idx 1, pkts from guest */
- struct virtio_queue ctrl_vq; /* idx 2 */
+ struct virtio_queue rx_vq; /* idx 0*/
+ struct virtio_queue tx_vq; /* idx 1*/
+ struct virtio_queue ctrl_vq; /* idx 2*/
- int buffed_rx;
- int tx_disabled; /* stop TX pkts from guest */
+ uint8_t mergeable_rx_bufs;
- uint64_t pkt_sent, pkt_recv, pkt_drop;
+ struct v3_timer * timer;
+ struct nic_statistics stats;
struct v3_dev_net_ops * net_ops;
v3_lock_t rx_lock, tx_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;
};
-/* virtio nic error type */
-#define ERR_VIRTIO_OTHER 1
-#define ERR_VIRTIO_RXQ_FULL 2
-#define ERR_VIRTIO_RXQ_NOSET 3
-#define ERR_VIRTIO_TXQ_NOSET 4
-#define ERR_VIRTIO_TXQ_FULL 5
-#define ERR_VIRTIO_TXQ_DISABLED 6
-
-
-
static int virtio_init_state(struct virtio_net_state * virtio)
{
virtio->ctrl_vq.cur_avail_idx = 0;
virtio->virtio_cfg.pci_isr = 0;
+
+ 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);
+ }
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");
}
- virtio->pkt_sent = virtio->pkt_recv = virtio->pkt_drop = 0;
- virtio->buffed_rx = 0;
-
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;
if (v3_gpa_to_hva(core, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
- PrintError("Could not translate buffer address\n");
- return -ERR_VIRTIO_OTHER;
+ 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);
}
- return virtio->net_ops->send(buf, len, virtio->backend_data);
+ 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
-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 offset)
-{
+/*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 (v3_gpa_to_hva(core, desc->addr_gpa, (addr_t *)&(desc_buf)) == -1) {
- PrintError("Could not translate buffer address\n");
+ PrintDebug("Could not translate buffer address\n");
return -1;
}
- len = (desc->length < buf_len)?(desc->length - offset):buf_len;
- memcpy(desc_buf+offset, 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;
}
static inline void enable_cb(struct virtio_queue *queue){
- queue->used->flags &= ~ VRING_NO_NOTIFY_FLAG;
+ if(queue->used){
+ queue->used->flags &= ~ VRING_NO_NOTIFY_FLAG;
+ }
}
static inline void disable_cb(struct virtio_queue *queue) {
- queue->used->flags |= VRING_NO_NOTIFY_FLAG;
-}
-
-
-/* interrupt the guest, so the guest core get EXIT to Palacios
- * this happens when there are either incoming pkts for the guest
- * or the guest can start TX pkts again */
-static inline void notify_guest(struct virtio_net_state * virtio){
- v3_interrupt_cpu(virtio->virtio_dev->vm, virtio->virtio_dev->vm->cores[0].cpu_id, 0);
-}
-
-
-/* guest free some pkts from rx queue */
-static int handle_rx_kick(struct guest_info *core,
- struct virtio_net_state * virtio)
-{
- unsigned long flags;
-
- flags = v3_lock_irqsave(virtio->rx_lock);
-
- if(virtio->net_ops->start_rx != NULL){
- virtio->net_ops->start_rx(virtio->backend_data);
+ if(queue->used){
+ queue->used->flags |= VRING_NO_NOTIFY_FLAG;
}
- //disable_cb(&virtio->rx_vq);
-
- v3_unlock_irqrestore(virtio->rx_lock, flags);
-
- return 0;
-}
-
-
-static int handle_ctrl(struct guest_info *core,
- struct virtio_net_state * virtio) {
-
- return 0;
}
-static int handle_pkt_tx(struct guest_info *core,
- struct virtio_net_state * virtio_state)
+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;
- int recved = 0;
+ struct virtio_queue *q = &(virtio_state->tx_vq);
+ int txed = 0, left = 0;
unsigned long flags;
- if (!q->ring_avail_addr)
- return -ERR_VIRTIO_TXQ_NOSET;
-
- if(virtio_state->tx_disabled)
- return -ERR_VIRTIO_TXQ_DISABLED;
+ 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 (v3_gpa_to_hva(core, hdr_desc->addr_gpa, &(hdr_addr)) == -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;
- if(desc_cnt > 2){
- PrintError("VNIC: merged rx buffer not supported\n");
- goto exit_error;
- }
-
- /* here we assumed that one ethernet pkt is not splitted into multiple virtio buffer */
- 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");
- goto exit_error;
- }
+ 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 ++;
- recved ++;
-
- 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;
+ }
}
-
+
v3_unlock_irqrestore(virtio_state->tx_lock, flags);
-
- if(!recved)
- return 0;
-
- if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
- v3_pci_raise_irq(virtio_state->virtio_dev->pci_bus, 0, virtio_state->pci_dev);
+
+ 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 ++;
}
- return 0;
+ if(txed > 0) {
+ V3_Net_Print(2, "Virtio Handle TX: txed pkts: %d, left %d\n", txed, left);
+ }
-exit_error:
-
+ return left;
+
+ exit_error:
+
v3_unlock_irqrestore(virtio_state->tx_lock, flags);
- return -ERR_VIRTIO_OTHER;
+ return -1;
}
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:
uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
switch (queue_idx) {
case 0:
- virtio_setup_queue(core, virtio, &virtio->rx_vq, pfn, page_addr);
- //disable_cb(&virtio->rx_vq);
+ 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);
- //disable_cb(&virtio->tx_vq);
+ 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;
{
uint16_t queue_idx = *(uint16_t *)src;
if (queue_idx == 0){
- handle_rx_kick(core, virtio);
+ /* 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("Wrong queue index %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;
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 0x%x (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) {
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:
break;
default:
- PrintError("Virtio NIC: Read of Unhandled Virtio Read:%d\n", port_idx);
+ 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_mrg_rxbuf hdr;
- uint32_t hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
- uint32_t data_len = size;
- uint32_t offset = 0;
unsigned long flags;
- int ret_val = -ERR_VIRTIO_OTHER;
- int raw = 1;
-
-#ifndef CONFIG_DEBUG_VIRTIO_NET
- {
- PrintDebug("Virtio-NIC: virtio_rx: size: %d\n", size);
- //v3_hexdump(buf, size, NULL, 0);
- }
-#endif
+ uint8_t kick_guest = 0;
- flags = v3_lock_irqsave(virtio->rx_lock);
+ V3_Net_Print(2, "Virtio NIC: virtio_rx: size: %d\n", size);
- virtio->pkt_recv ++;
- 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;
+ }
- if (!raw)
- memcpy(&hdr, buf, sizeof(struct virtio_net_hdr_mrg_rxbuf));
- else
- memset(&hdr, 0, sizeof(struct virtio_net_hdr_mrg_rxbuf));
+ memset(&hdr, 0, sizeof(struct virtio_net_hdr_mrg_rxbuf));
- if (q->ring_avail_addr == 0) {
- PrintError("Queue is not set\n");
- ret_val = -ERR_VIRTIO_RXQ_NOSET;
- 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;
+ 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;
- hdr_desc = &(q->desc[hdr_idx]);
- if (v3_gpa_to_hva(&(virtio->virtio_dev->vm->cores[0]), hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
- PrintError("Could not translate receive buffer address\n");
- goto exit;
- }
- hdr.num_buffers = 1;
- memcpy((void *)hdr_addr, &hdr, sizeof(struct virtio_net_hdr_mrg_rxbuf));
- 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 ++;
+ }
- struct vring_desc * buf_desc = NULL;
- for (buf_idx = hdr_desc->next; offset < data_len; buf_idx = q->desc[hdr_idx].next) {
- 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]);
- len = copy_data_to_desc(&(virtio->virtio_dev->vm->cores[0]), virtio, buf_desc, buf + offset, data_len - offset, 0);
+ /* 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, 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;
- }
- buf_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 = data_len + hdr_len; /* This should be the total length of data sent to guest (header+pkt_data) */
- q->used->index++;
- q->cur_avail_idx++;
-
- /* if there are certain num of pkts in the RX queue, notify guest
- * so guest will exit to palacios
- * when it returns, guest gets the virtio rx interrupt */
- if((++virtio->buffed_rx > q->queue_size/5) &&
- (q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
- if(virtio->virtio_dev->vm->cores[0].cpu_id != V3_Get_CPU()){
- notify_guest(virtio);
+ buf_desc->flags &= ~VIRTIO_NEXT_FLAG;
+
+ if(offset < size){
+ V3_Net_Print(2, "Virtio NIC: rx not enough ring buffer, buffer size %d\n",
+ len);
+ goto err_exit;
}
- virtio->buffed_rx = 0;
- }
+
+ 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++;
- /* RX queue is full, tell backend to stop RX on this device */
- virtio->net_ops->stop_rx(virtio->backend_data);
- enable_cb(&virtio->rx_vq);
-
- ret_val = -ERR_VIRTIO_RXQ_FULL;
- 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;
+ /* 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);
+ }
-exit:
+ return 0;
+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) {
};
-/* TODO: Issue here: which vm info it needs? calling VM or the device's own VM? */
-static void virtio_nic_poll(struct v3_vm_info * vm, void * data){
- struct virtio_net_state * virtio = (struct virtio_net_state *)data;
-
- handle_pkt_tx(&(vm->cores[0]), virtio);
-}
-
-static void virtio_start_tx(void * data){
- struct virtio_net_state * virtio = (struct virtio_net_state *)data;
- unsigned long flags;
+static int virtio_poll(int quote, void * data){
+ struct virtio_net_state * virtio = (struct virtio_net_state *)data;
- flags = v3_lock_irqsave(virtio->tx_lock);
- virtio->tx_disabled = 0;
+ if (virtio->status) {
- /* notify the device's guest to start sending pkt */
- if(virtio->virtio_dev->vm->cores[0].cpu_id != V3_Get_CPU()){
- notify_guest(virtio);
- }
- v3_unlock_irqrestore(virtio->tx_lock, flags);
-}
-
-static void virtio_stop_tx(void * data){
- struct virtio_net_state * virtio = (struct virtio_net_state *)data;
- unsigned long flags;
-
- flags = v3_lock_irqsave(virtio->tx_lock);
- virtio->tx_disabled = 1;
-
- /* stop the guest to exit to palacios for sending pkt? */
- if(virtio->virtio_dev->vm->cores[0].cpu_id != V3_Get_CPU()){
- disable_cb(&virtio->tx_vq);
- }
+ return handle_pkt_tx(&(virtio->vm->cores[0]), virtio, quote);
+ }
- v3_unlock_irqrestore(virtio->tx_lock, flags);
+ return 0;
}
-
-
-
static int register_dev(struct virtio_dev_state * virtio,
struct virtio_net_state * net_state)
{
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;
bars[0].private_data = net_state;
pci_dev = v3_pci_register_device(virtio->pci_bus, PCI_STD_DEVICE,
- 0, 4/*PCI_AUTO_DEV_NUM*/, 0,
+ 0, PCI_AUTO_DEV_NUM, 0,
"LNX_VIRTIO_NIC", bars,
NULL, NULL, NULL, net_state);
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->poll = virtio_nic_poll;
- ops->start_tx = virtio_start_tx;
- ops->stop_tx = virtio_stop_tx;
- ops->frontend_data = net_state;
- memcpy(ops->fnt_mac, virtio->mac, ETH_ALEN);
+ 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 str2mac(char * macstr, char * mac){
- char hex[2], *s = macstr;
- int i = 0;
-
- while(s){
- memcpy(hex, s, 2);
- mac[i++] = (char)atox(hex);
- if (i == ETH_ALEN) return 0;
- s=strchr(s, ':');
- if(s) s++;
- }
-
- return -1;
-}
-
-static inline void random_ethaddr(uchar_t * addr)
-{
- uint64_t val;
-
- /* using current rdtsc as random number */
- rdtscll(val);
- *(uint64_t *)addr = val;
-
- addr [0] &= 0xfe; /* clear multicast bit */
- addr [0] |= 0x02; /* set local assignment bit (IEEE802) */
-}
-
-
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 * dev_id = v3_cfg_val(cfg, "ID");
- char * macstr = v3_cfg_val(cfg, "mac");
+ 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;
}
if (macstr != NULL && !str2mac(macstr, virtio_state->mac)) {
PrintDebug("Virtio NIC: Mac specified %s\n", macstr);
}else {
- PrintDebug("Virtio NIC: MAC not specified\n");
random_ethaddr(virtio_state->mac);
}
