#define CTRL_QUEUE 0
-#define RECV_QUEUE 2
#define XMIT_QUEUE 1
+#define RECV_QUEUE 2
struct virtio_vnet_state {
- struct v3_vm_info *vm;
+ struct v3_vm_info * vm;
struct vnet_config vnet_cfg;
struct virtio_config virtio_cfg;
uint32_t num_cmds;
} __attribute__((packed));
-static int virtio_reset(struct virtio_vnet_state * vnet_brg) {
- memset(vnet_brg->queue, 0, sizeof(struct virtio_queue) * 2);
+struct vnet_virtio_pkt {
+ uint32_t link_id;
+ uint32_t pkt_size;
+ uint8_t pkt[1500];
+};
+
+static int virtio_reset(struct virtio_vnet_state * vnet_state) {
+
+ memset(vnet_state->queue, 0, sizeof(struct virtio_queue) * 2);
- vnet_brg->cur_queue = &(vnet_brg->queue[0]);
+ vnet_state->cur_queue = &(vnet_state->queue[0]);
- vnet_brg->virtio_cfg.status = 0;
- vnet_brg->virtio_cfg.pci_isr = 0;
+ vnet_state->virtio_cfg.status = 0;
+ vnet_state->virtio_cfg.pci_isr = 0;
- vnet_brg->queue[0].queue_size = QUEUE_SIZE;
- vnet_brg->queue[1].queue_size = QUEUE_SIZE;
- vnet_brg->queue[2].queue_size = QUEUE_SIZE;
+ vnet_state->queue[0].queue_size = QUEUE_SIZE;
+ vnet_state->queue[1].queue_size = QUEUE_SIZE;
+ vnet_state->queue[2].queue_size = QUEUE_SIZE;
- memset(&(vnet_brg->vnet_cfg), 0, sizeof(struct vnet_config));
- v3_lock_init(&(vnet_brg->lock));
+ memset(&(vnet_state->vnet_cfg), 0, sizeof(struct vnet_config));
+ v3_lock_init(&(vnet_state->lock));
return 0;
}
PrintDebug("VNET Bridge: Handling command queue\n");
- while (q->cur_avail_idx < q->avail->index) {
+ while (q->cur_avail_idx != q->avail->index) {
struct vring_desc * hdr_desc = NULL;
struct vring_desc * buf_desc = NULL;
struct vring_desc * status_desc = NULL;
return 0;
}
-static int copy_data_to_desc(struct guest_info *core,
- struct vring_desc * desc,
- uchar_t * buf,
- uint_t buf_len)
-{
- 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");
- return -1;
- }
- len = (desc->length < buf_len)?desc->length:buf_len;
- memcpy(desc_buf, buf, len);
- return len;
-}
-
-
-static int vnet_brg_rx(struct v3_vnet_pkt *pkt, void * private_data) {
- struct virtio_vnet_state * vnet_brg = (struct virtio_vnet_state *)private_data;
- struct virtio_queue * q = &(vnet_brg->queue[RECV_QUEUE]);
- char *buf = (char *)pkt;
- int ret_val;
- int pkt_head_len = ((addr_t)pkt->data) - ((addr_t)pkt);
- uint32_t data_len = sizeof(struct v3_vnet_pkt); //TODO: should not transfer the whole struct, only the data size
+static int vnet_pkt_input_cb(struct v3_vm_info * vm, struct v3_vnet_pkt * pkt, void * private_data){
+ struct virtio_vnet_state * vnet_state = (struct virtio_vnet_state *)private_data;
+ struct virtio_queue * q = &(vnet_state->queue[RECV_QUEUE]);
+ int ret_val = -1;
unsigned long flags;
- flags = v3_lock_irqsave(vnet_brg->lock);
+ flags = v3_lock_irqsave(vnet_state->lock);
PrintDebug("VNET Bridge: RX: pkt sent to guest size: %d\n, pkt_header_len: %d\n", data_len, pkt_head_len);
- v3_hexdump(buf, 100, NULL, 0);
if (q->ring_avail_addr == 0) {
PrintError("Queue is not set\n");
- ret_val = -1;
goto exit;
}
- if (q->last_avail_idx > q->avail->index)
- q->idx_overflow = true;
- q->last_avail_idx = q->avail->index;
- if (q->cur_avail_idx < q->avail->index || (q->idx_overflow && q->cur_avail_idx < q->avail->index+65536)){
- uint16_t buf_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
- uint32_t len = 0;
- uint32_t offset = 0;
- struct vring_desc * buf_desc = NULL;
+ if (q->cur_avail_idx != q->avail->index) {
+ uint16_t pkt_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
+ struct vring_desc * pkt_desc = NULL;
+ struct vnet_virtio_pkt * virtio_pkt = NULL;
- buf_desc = &(q->desc[buf_idx]);
- PrintDebug("VNET Bridge RX: buffer desc len: %d\n", buf_desc->length);
- len = copy_data_to_desc(&(vnet_brg->vm->cores[0]), buf_desc, buf + offset, data_len - offset);
- if (len == -1) {
- ret_val = -1;
- goto exit;
- }
- offset += len;
- buf_desc->length = len;
-
- if (offset >= data_len) {
- buf_desc->flags &= ~VIRTIO_NEXT_FLAG;
- }else {
- PrintDebug("VNET Bridge: RX: Pkt not fit into one desc buf\n");
+ pkt_desc = &(q->desc[pkt_idx]);
+ PrintDebug("VNET Bridge RX: buffer desc len: %d\n", pkt_desc->length);
+
+ if (guest_pa_to_host_va(&(vm->cores[0]), pkt_desc->addr_gpa, (addr_t *)&(virtio_pkt)) == -1) {
+ PrintError("Could not translate buffer address\n");
+ return -1;
}
+ // Fill in dst packet buffer
+ virtio_pkt->link_id = pkt->dst_id;
+ virtio_pkt->pkt_size = pkt->size;
+ memcpy(virtio_pkt->pkt, pkt->data, pkt->size);
+
+
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; // This should be the total length of data sent to guest (header+pkt_data)
- q->used->index++;
+ q->used->ring[q->used->index % q->queue_size].length = sizeof(struct vnet_virtio_pkt); // This should be the total length of data sent to guest (header+pkt_data)
- int last_idx = q->cur_avail_idx;
+ q->used->index++;
q->cur_avail_idx++;
- if (q->cur_avail_idx < last_idx)
- q->idx_overflow = false;
} else {
- PrintDebug("VNET Bridge: Handle RX: Fails to send, no available buffer: current_idx:%d, availIdx: %d\n", q->cur_avail_idx, q->avail->index);
+ PrintError("Packet buffer overflow in the guest\n");
}
if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
- v3_pci_raise_irq(vnet_brg->pci_bus, 0, vnet_brg->pci_dev);
- vnet_brg->virtio_cfg.pci_isr = 0x1;
- PrintDebug("Raising IRQ %d\n", vnet_brg->pci_dev->config_header.intr_line);
+ v3_pci_raise_irq(vnet_state->pci_bus, 0, vnet_state->pci_dev);
+ vnet_state->virtio_cfg.pci_isr = 0x1;
+ PrintDebug("Raising IRQ %d\n", vnet_state->pci_dev->config_header.intr_line);
}
+
ret_val = 0;
exit:
-
- v3_unlock_irqrestore(vnet_brg->lock, flags);
+ v3_unlock_irqrestore(vnet_state->lock, flags);
return ret_val;
}
-static int vnet_send(struct v3_vnet_pkt *pkt, int pkt_len, void * private_data){
- struct guest_info *core = (struct guest_info *)private_data;
-
-#ifdef CONFIG_DEBUG_VNET_BRG
- {
- PrintDebug("VNET Bridge: send pkt size: %d\n", pkt->size);
- v3_hexdump(pkt->data,pkt->size, NULL, 0);
- }
-#endif
-
-#ifdef CONFIG_VNET_PROFILE
- uint64_t start, end;
- rdtscll(start);
- core->vnet_times.time_copy_from_guest = start - core->vnet_times.virtio_handle_start;
-#endif
-
- pkt->src_type = LINK_EDGE;
-
- return v3_vnet_send_pkt(pkt, (void *)core);
-}
-
-static int pkt_tx(struct guest_info *core, struct virtio_vnet_state * vnet_brg, struct vring_desc * buf_desc)
-{
- uint8_t * buf = NULL;
- uint32_t len = buf_desc->length;
- struct v3_vnet_pkt *pkt;
- if (guest_pa_to_host_va(core, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
- PrintError("Could not translate buffer address\n");
- return -1;
- }
-
- pkt = (struct v3_vnet_pkt *)buf;
- if (vnet_send(pkt, len, (void *)core) == -1) {
- return -1;
- }
-
- return 0;
-}
-
-static int handle_pkt_tx(struct guest_info *core, struct virtio_vnet_state * vnet_brg)
+static int handle_pkt_kick(struct guest_info *core, struct virtio_vnet_state * vnet_state)
{
- struct virtio_queue * q = &(vnet_brg->queue[XMIT_QUEUE]);
-
- if (q->avail->index < q->last_avail_idx) {
- q->idx_overflow = true;
- }
-
- q->last_avail_idx = q->avail->index;
+ struct virtio_queue * q = &(vnet_state->queue[XMIT_QUEUE]);
PrintDebug("VNET Bridge Device: Handle TX\n");
- while (q->cur_avail_idx < q->avail->index ||
- (q->idx_overflow && q->cur_avail_idx < (q->avail->index + 65536))) {
- struct vring_desc * buf_desc = NULL;
+ while (q->cur_avail_idx != q->avail->index) {
uint16_t desc_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
+ struct vring_desc * pkt_desc = NULL;
+ struct vnet_virtio_pkt * virtio_pkt = NULL;
- buf_desc = &(q->desc[desc_idx]);
+ pkt_desc = &(q->desc[desc_idx]);
- PrintDebug("VNET Bridge: Handle TX buf_len: %d\n", buf_desc->length);
+ PrintDebug("VNET Bridge: Handle TX buf_len: %d\n", pkt_desc->length);
- if (pkt_tx(core, vnet_brg, buf_desc) == -1) {
- PrintError("Error handling nic operation\n");
- return -1;
+ if (guest_pa_to_host_va(core, pkt_desc->addr_gpa, (addr_t *)&(virtio_pkt)) == -1) {
+ PrintError("Could not translate buffer address\n");
+ return -1;
}
-
+
+ //TODO: SETUP VNET PACKET data structure
+
+ /*
+ if (v3_vnet_send_pkt(pkt, (void *)core) == -1) {
+ PrintError("Error sending packet to vnet\n");
+ return -1;
+ }
+ */
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->ring[q->used->index % q->queue_size].length = pkt_desc->length; // What do we set this to????
q->used->index++;
- int last_idx = q->cur_avail_idx;
- q->cur_avail_idx ++;
- if (q->cur_avail_idx < last_idx) {
- q->idx_overflow = false;
- }
+ q->cur_avail_idx++;
}
if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
- v3_pci_raise_irq(vnet_brg->pci_bus, 0, vnet_brg->pci_dev);
- vnet_brg->virtio_cfg.pci_isr = 0x1;
+ v3_pci_raise_irq(vnet_state->pci_bus, 0, vnet_state->pci_dev);
+ vnet_state->virtio_cfg.pci_isr = 0x1;
}
#ifdef CONFIG_VNET_PROFILE
}
static int virtio_io_write(struct guest_info * core, uint16_t port, void * src, uint_t length, void * private_data) {
- struct virtio_vnet_state * vnet_brg = (struct virtio_vnet_state *)private_data;
- int port_idx = port % vnet_brg->io_range_size;
+ struct virtio_vnet_state * vnet_state = (struct virtio_vnet_state *)private_data;
+ int port_idx = port % vnet_state->io_range_size;
PrintDebug("VNET Bridge: VIRTIO VNET Write for port %d len=%d, value=%x\n",
PrintError("Illegal write length for guest features\n");
return -1;
}
- vnet_brg->virtio_cfg.guest_features = *(uint32_t *)src;
+ vnet_state->virtio_cfg.guest_features = *(uint32_t *)src;
break;
case VRING_PG_NUM_PORT:
addr_t pfn = *(uint32_t *)src;
addr_t page_addr = (pfn << VIRTIO_PAGE_SHIFT);
- vnet_brg->cur_queue->pfn = pfn;
+ vnet_state->cur_queue->pfn = pfn;
- vnet_brg->cur_queue->ring_desc_addr = page_addr ;
- vnet_brg->cur_queue->ring_avail_addr = page_addr + (QUEUE_SIZE * sizeof(struct vring_desc));
- vnet_brg->cur_queue->ring_used_addr = ( vnet_brg->cur_queue->ring_avail_addr + \
+ vnet_state->cur_queue->ring_desc_addr = page_addr ;
+ vnet_state->cur_queue->ring_avail_addr = page_addr + (QUEUE_SIZE * sizeof(struct vring_desc));
+ vnet_state->cur_queue->ring_used_addr = ( vnet_state->cur_queue->ring_avail_addr + \
sizeof(struct vring_avail) + \
(QUEUE_SIZE * sizeof(uint16_t)));
// round up to next page boundary.
- vnet_brg->cur_queue->ring_used_addr = (vnet_brg->cur_queue->ring_used_addr + 0xfff) & ~0xfff;
+ vnet_state->cur_queue->ring_used_addr = (vnet_state->cur_queue->ring_used_addr + 0xfff) & ~0xfff;
- if (guest_pa_to_host_va(core, vnet_brg->cur_queue->ring_desc_addr, (addr_t *)&(vnet_brg->cur_queue->desc)) == -1) {
+ if (guest_pa_to_host_va(core, vnet_state->cur_queue->ring_desc_addr, (addr_t *)&(vnet_state->cur_queue->desc)) == -1) {
PrintError("Could not translate ring descriptor address\n");
return -1;
}
- if (guest_pa_to_host_va(core, vnet_brg->cur_queue->ring_avail_addr, (addr_t *)&(vnet_brg->cur_queue->avail)) == -1) {
+ if (guest_pa_to_host_va(core, vnet_state->cur_queue->ring_avail_addr, (addr_t *)&(vnet_state->cur_queue->avail)) == -1) {
PrintError("Could not translate ring available address\n");
return -1;
}
- if (guest_pa_to_host_va(core, vnet_brg->cur_queue->ring_used_addr, (addr_t *)&(vnet_brg->cur_queue->used)) == -1) {
+ if (guest_pa_to_host_va(core, vnet_state->cur_queue->ring_used_addr, (addr_t *)&(vnet_state->cur_queue->used)) == -1) {
PrintError("Could not translate ring used address\n");
return -1;
}
PrintDebug("VNET Bridge: RingDesc_addr=%p, Avail_addr=%p, Used_addr=%p\n",
- (void *)(vnet_brg->cur_queue->ring_desc_addr),
- (void *)(vnet_brg->cur_queue->ring_avail_addr),
- (void *)(vnet_brg->cur_queue->ring_used_addr));
+ (void *)(vnet_state->cur_queue->ring_desc_addr),
+ (void *)(vnet_state->cur_queue->ring_avail_addr),
+ (void *)(vnet_state->cur_queue->ring_used_addr));
PrintDebug("VNET Bridge: RingDesc=%p, Avail=%p, Used=%p\n",
- vnet_brg->cur_queue->desc, vnet_brg->cur_queue->avail, vnet_brg->cur_queue->used);
+ vnet_state->cur_queue->desc, vnet_state->cur_queue->avail, vnet_state->cur_queue->used);
} else {
PrintError("Illegal write length for page frame number\n");
}
break;
case VRING_Q_SEL_PORT:
- vnet_brg->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
+ vnet_state->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
- if (vnet_brg->virtio_cfg.vring_queue_selector > NUM_QUEUES) {
+ if (vnet_state->virtio_cfg.vring_queue_selector > NUM_QUEUES) {
PrintError("VNET Bridge device has no qeueues. Selected %d\n",
- vnet_brg->virtio_cfg.vring_queue_selector);
+ vnet_state->virtio_cfg.vring_queue_selector);
return -1;
}
- vnet_brg->cur_queue = &(vnet_brg->queue[vnet_brg->virtio_cfg.vring_queue_selector]);
+ vnet_state->cur_queue = &(vnet_state->queue[vnet_state->virtio_cfg.vring_queue_selector]);
break;
case VRING_Q_NOTIFY_PORT: {
PrintDebug("VNET Bridge: Handling Kick\n");
if (queue_idx == 0) {
- if (handle_cmd_kick(core, vnet_brg) == -1) {
+ if (handle_cmd_kick(core, vnet_state) == -1) {
PrintError("Could not handle Virtio VNET Control command\n");
return -1;
}
} else if (queue_idx == 1) {
- if (handle_pkt_tx(core, vnet_brg) == -1){
+ if (handle_pkt_kick(core, vnet_state) == -1){
PrintError("Could not handle Virtio VNET TX\n");
return -1;
}
break;
}
case VIRTIO_STATUS_PORT:
- vnet_brg->virtio_cfg.status = *(uint8_t *)src;
+ vnet_state->virtio_cfg.status = *(uint8_t *)src;
- if (vnet_brg->virtio_cfg.status == 0) {
+ if (vnet_state->virtio_cfg.status == 0) {
PrintDebug("VNET Bridge: Resetting device\n");
- virtio_reset(vnet_brg);
+ virtio_reset(vnet_state);
}
break;
case VIRTIO_ISR_PORT:
- vnet_brg->virtio_cfg.pci_isr = *(uint8_t *)src;
+ vnet_state->virtio_cfg.pci_isr = *(uint8_t *)src;
break;
default:
return -1;
return length;
}
-static int vnet_brg_input(struct v3_vm_info * vm,
- struct v3_vnet_pkt * pkt,
- void * private_data){
- return vnet_brg_rx(pkt, private_data);
-}
static struct v3_device_ops dev_ops = {
.free = NULL,
static int dev_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_vnet_state * vbrg_state = NULL;
+ struct virtio_vnet_state * vnet_state = NULL;
struct pci_device * pci_dev = NULL;
char * name = v3_cfg_val(cfg, "name");
return -1;
}
- vbrg_state = (struct virtio_vnet_state *)V3_Malloc(sizeof(struct virtio_vnet_state));
- memset(vbrg_state, 0, sizeof(struct virtio_vnet_state));
+ vnet_state = (struct virtio_vnet_state *)V3_Malloc(sizeof(struct virtio_vnet_state));
+ memset(vnet_state, 0, sizeof(struct virtio_vnet_state));
- vbrg_state->vm = vm;
+ vnet_state->vm = vm;
- struct vm_device * dev = v3_allocate_device(name, &dev_ops, vbrg_state);
+ struct vm_device * dev = v3_allocate_device(name, &dev_ops, vnet_state);
if (v3_attach_device(vm, dev) == -1) {
PrintError("Could not attach device %s\n", name);
int i;
// This gets the number of ports, rounded up to a power of 2
- vbrg_state->io_range_size = 1; // must be a power of 2
+ vnet_state->io_range_size = 1; // must be a power of 2
while (tmp_ports > 0) {
tmp_ports >>= 1;
- vbrg_state->io_range_size <<= 1;
+ vnet_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
- if ((num_ports & ((vbrg_state->io_range_size >> 1) - 1)) == 0) {
- vbrg_state->io_range_size >>= 1;
+ if ((num_ports & ((vnet_state->io_range_size >> 1) - 1)) == 0) {
+ vnet_state->io_range_size >>= 1;
}
for (i = 0; i < 6; i++) {
bars[0].type = PCI_BAR_IO;
bars[0].default_base_port = -1;
- bars[0].num_ports = vbrg_state->io_range_size;
+ bars[0].num_ports = vnet_state->io_range_size;
bars[0].io_read = virtio_io_read;
bars[0].io_write = virtio_io_write;
- bars[0].private_data = vbrg_state;
+ bars[0].private_data = vnet_state;
pci_dev = v3_pci_register_device(pci_bus, PCI_STD_DEVICE,
0, PCI_AUTO_DEV_NUM, 0,
"LNX_VIRTIO_VNET", bars,
- NULL, NULL, NULL, vbrg_state);
+ NULL, NULL, NULL, vnet_state);
if (!pci_dev) {
PrintError("Could not register PCI Device\n");
pci_dev->config_header.max_latency = 1; // ?? (qemu does it...)
- vbrg_state->pci_dev = pci_dev;
- vbrg_state->pci_bus = pci_bus;
+ vnet_state->pci_dev = pci_dev;
+ vnet_state->pci_bus = pci_bus;
}
- virtio_reset(vbrg_state);
+ virtio_reset(vnet_state);
- v3_vnet_add_bridge(vm, vnet_brg_input, (void *)vbrg_state);
-
-//for temporary hack
-#if 1
- {
- uchar_t dstmac[6] = {0xff,0xff,0xff,0xff,0xff,0xff};
- uchar_t zeromac[6] = {0,0,0,0,0,0};
-
- struct v3_vnet_route route;
- route.dst_id = 0;
- route.dst_type = LINK_EDGE;
- route.src_id = -1;
- route.src_type = LINK_ANY;
-
- memcpy(route.dst_mac, dstmac, 6);
- route.dst_mac_qual = MAC_NONE;
- memcpy(route.src_mac, zeromac, 6);
- route.src_mac_qual = MAC_ANY;
-
- v3_vnet_add_route(route);
- }
-#endif
+ v3_vnet_add_bridge(vm, vnet_pkt_input_cb, (void *)vnet_state);
return 0;
}
