#include <palacios/vm_guest_mem.h>
#include <devices/lnx_virtio_pci.h>
#include <palacios/vmm_vnet.h>
+#include <palacios/vmm_sprintf.h>
#include <devices/pci.h>
+#ifndef CONFIG_DEBUG_VNET_BRG
+#undef PrintDebug
+#define PrintDebug(fmt, args...)
+#endif
+
+
#define QUEUE_SIZE 128
#define NUM_QUEUES 3
} __attribute__((packed));
+#define CTRL_QUEUE 0
+#define RECV_QUEUE 2
+#define XMIT_QUEUE 1
struct virtio_vnet_state {
+ struct v3_vm_info *vm;
struct vnet_config vnet_cfg;
struct virtio_config virtio_cfg;
-
struct vm_device * pci_bus;
struct pci_device * pci_dev;
-
-
-#define CTRL_QUEUE 0
-#define RECV_QUEUE 1
-#define XMIT_QUEUE 2
+
struct virtio_queue queue[NUM_QUEUES];
struct virtio_queue * cur_queue;
-
int io_range_size;
+ v3_lock_t lock;
};
#define VNET_GET_ROUTES 10
uint32_t num_cmds;
} __attribute__((packed));
+#define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
+#define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10))
+
+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 */
+}__attribute__((packed));
-static int virtio_reset(struct virtio_vnet_state * virtio) {
- memset(virtio->queue, 0, sizeof(struct virtio_queue) * 2);
+static int virtio_reset(struct virtio_vnet_state * vnet_brg) {
- virtio->cur_queue = &(virtio->queue[0]);
+ memset(vnet_brg->queue, 0, sizeof(struct virtio_queue) * 2);
- virtio->virtio_cfg.status = 0;
- virtio->virtio_cfg.pci_isr = 0;
+ vnet_brg->cur_queue = &(vnet_brg->queue[0]);
- virtio->queue[0].queue_size = QUEUE_SIZE;
- virtio->queue[1].queue_size = QUEUE_SIZE;
- virtio->queue[2].queue_size = QUEUE_SIZE;
+ vnet_brg->virtio_cfg.status = 0;
+ vnet_brg->virtio_cfg.pci_isr = 0;
- memset(&(virtio->vnet_cfg), 0, sizeof(struct vnet_config));
+ vnet_brg->queue[0].queue_size = QUEUE_SIZE;
+ vnet_brg->queue[1].queue_size = QUEUE_SIZE;
+ vnet_brg->queue[2].queue_size = QUEUE_SIZE;
+
+ memset(&(vnet_brg->vnet_cfg), 0, sizeof(struct vnet_config));
+ v3_lock_init(&(vnet_brg->lock));
return 0;
}
static int handle_cmd_kick(struct guest_info * core, struct virtio_vnet_state * vnet_state) {
struct virtio_queue * q = &(vnet_state->queue[0]);
- PrintDebug("VirtioVNET: Virtio Kick on command queue\n");
+ PrintDebug("VNET Bridge: Handling command queue\n");
while (q->cur_avail_idx < q->avail->index) {
struct vring_desc * hdr_desc = NULL;
PrintDebug("Descriptor Count=%d, index=%d, desc_idx=%d\n", desc_cnt, q->cur_avail_idx % QUEUE_SIZE, desc_idx);
if (desc_cnt < 3) {
- PrintError("VirtioVNET cmd must include at least 3 descriptors (cnt=%d)\n", desc_cnt);
+ PrintError("VNET Bridge cmd must include at least 3 descriptors (cnt=%d)\n", desc_cnt);
return -1;
}
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
+ unsigned long flags;
+
+ flags = v3_lock_irqsave(vnet_brg->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;
+
+ 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");
+ }
+
+ 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++;
+
+ int last_idx = q->cur_avail_idx;
+ 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);
+ }
+
+ 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);
+ }
+
+ ret_val = 0;
+
+exit:
+
+ v3_unlock_irqrestore(vnet_brg->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)
+{
+ 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;
+
+ 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;
+ uint16_t desc_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
+
+ buf_desc = &(q->desc[desc_idx]);
+
+ PrintDebug("VNET Bridge: Handle TX buf_len: %d\n", buf_desc->length);
+
+ if (pkt_tx(core, vnet_brg, buf_desc) == -1) {
+ PrintError("Error handling nic operation\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->index++;
+
+ int last_idx = q->cur_avail_idx;
+ q->cur_avail_idx ++;
+ if (q->cur_avail_idx < last_idx) {
+ q->idx_overflow = false;
+ }
+ }
+
+ 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;
+ }
+
+#ifdef CONFIG_VNET_PROFILE
+ uint64_t time;
+ rdtscll(time);
+ core->vnet_times.total_handle_time = time - core->vnet_times.virtio_handle_start;
+ core->vnet_times.print = true;
+#endif
+
+ return 0;
+}
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_state = (struct virtio_vnet_state *)private_data;
- int port_idx = port % vnet_state->io_range_size;
+ struct virtio_vnet_state * vnet_brg = (struct virtio_vnet_state *)private_data;
+ int port_idx = port % vnet_brg->io_range_size;
- PrintDebug("VirtioVNET: VIRTIO VNET Write for port %d len=%d, value=%x\n",
+ PrintDebug("VNET Bridge: VIRTIO VNET Write for port %d len=%d, value=%x\n",
port, length, *(uint32_t *)src);
- PrintDebug("VirtioVNET: port idx=%d\n", port_idx);
+ PrintDebug("VNET Bridge: port idx=%d\n", port_idx);
switch (port_idx) {
if (length != 4) {
PrintError("Illegal write length for guest features\n");
return -1;
- }
-
- vnet_state->virtio_cfg.guest_features = *(uint32_t *)src;
+ }
+ vnet_brg->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_state->cur_queue->pfn = pfn;
+ vnet_brg->cur_queue->pfn = pfn;
- 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 + \
+ 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 + \
sizeof(struct vring_avail) + \
(QUEUE_SIZE * sizeof(uint16_t)));
// round up to next page boundary.
- vnet_state->cur_queue->ring_used_addr = (vnet_state->cur_queue->ring_used_addr + 0xfff) & ~0xfff;
+ vnet_brg->cur_queue->ring_used_addr = (vnet_brg->cur_queue->ring_used_addr + 0xfff) & ~0xfff;
- if (guest_pa_to_host_va(core, vnet_state->cur_queue->ring_desc_addr, (addr_t *)&(vnet_state->cur_queue->desc)) == -1) {
+ if (guest_pa_to_host_va(core, vnet_brg->cur_queue->ring_desc_addr, (addr_t *)&(vnet_brg->cur_queue->desc)) == -1) {
PrintError("Could not translate ring descriptor address\n");
return -1;
}
-
- if (guest_pa_to_host_va(core, vnet_state->cur_queue->ring_avail_addr, (addr_t *)&(vnet_state->cur_queue->avail)) == -1) {
+ if (guest_pa_to_host_va(core, vnet_brg->cur_queue->ring_avail_addr, (addr_t *)&(vnet_brg->cur_queue->avail)) == -1) {
PrintError("Could not translate ring available address\n");
return -1;
}
-
- if (guest_pa_to_host_va(core, vnet_state->cur_queue->ring_used_addr, (addr_t *)&(vnet_state->cur_queue->used)) == -1) {
+ if (guest_pa_to_host_va(core, vnet_brg->cur_queue->ring_used_addr, (addr_t *)&(vnet_brg->cur_queue->used)) == -1) {
PrintError("Could not translate ring used address\n");
return -1;
}
- PrintDebug("VirtioVNET: RingDesc_addr=%p, Avail_addr=%p, Used_addr=%p\n",
- (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_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));
- PrintDebug("VirtioVNET: RingDesc=%p, Avail=%p, Used=%p\n",
- vnet_state->cur_queue->desc, vnet_state->cur_queue->avail, vnet_state->cur_queue->used);
+ 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);
} else {
PrintError("Illegal write length for page frame number\n");
}
break;
case VRING_Q_SEL_PORT:
- vnet_state->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
+ vnet_brg->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
- if (vnet_state->virtio_cfg.vring_queue_selector > NUM_QUEUES) {
- PrintError("Virtio Symbiotic device has no qeueues. Selected %d\n",
- vnet_state->virtio_cfg.vring_queue_selector);
+ if (vnet_brg->virtio_cfg.vring_queue_selector > NUM_QUEUES) {
+ PrintError("VNET Bridge device has no qeueues. Selected %d\n",
+ vnet_brg->virtio_cfg.vring_queue_selector);
return -1;
}
- vnet_state->cur_queue = &(vnet_state->queue[vnet_state->virtio_cfg.vring_queue_selector]);
+ vnet_brg->cur_queue = &(vnet_brg->queue[vnet_brg->virtio_cfg.vring_queue_selector]);
break;
case VRING_Q_NOTIFY_PORT: {
uint16_t queue_idx = *(uint16_t *)src;
- PrintDebug("VirtioVNET: Handling Kick\n");
+ PrintDebug("VNET Bridge: Handling Kick\n");
if (queue_idx == 0) {
- if (handle_cmd_kick(core, vnet_state) == -1) {
- PrintError("Could not handle VNET Control command\n");
+ if (handle_cmd_kick(core, vnet_brg) == -1) {
+ PrintError("Could not handle Virtio VNET Control command\n");
return -1;
}
} else if (queue_idx == 1) {
-
- // down queue
+ if (handle_pkt_tx(core, vnet_brg) == -1){
+ PrintError("Could not handle Virtio VNET TX\n");
+ return -1;
+ }
} else if (queue_idx == 2) {
- // up queue
+ PrintDebug("VNET Bridge: receive kick on RX Queue\n");
} else {
- PrintError("Kick on invalid queue (%d)\n", queue_idx);
+ PrintError("VNET Bridge: Kick on invalid queue (%d)\n", queue_idx);
return -1;
}
break;
}
case VIRTIO_STATUS_PORT:
- vnet_state->virtio_cfg.status = *(uint8_t *)src;
+ vnet_brg->virtio_cfg.status = *(uint8_t *)src;
- if (vnet_state->virtio_cfg.status == 0) {
- PrintDebug("VirtioVNET: Resetting device\n");
- virtio_reset(vnet_state);
+ if (vnet_brg->virtio_cfg.status == 0) {
+ PrintDebug("VNET Bridge: Resetting device\n");
+ virtio_reset(vnet_brg);
}
break;
case VIRTIO_ISR_PORT:
- vnet_state->virtio_cfg.pci_isr = *(uint8_t *)src;
+ vnet_brg->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 vnet_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
+static int vnet_brg_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 * virtio_state = NULL;
+ struct virtio_vnet_state * vbrg_state = NULL;
struct pci_device * pci_dev = NULL;
char * name = v3_cfg_val(cfg, "name");
- PrintDebug("VirtioVNET: Initializing VIRTIO VNET Control device\n");
+ PrintDebug("VNET Bridge: Initializing VNET Bridge Control device: %s\n", name);
if (pci_bus == NULL) {
- PrintError("VirtIO devices require a PCI Bus");
+ PrintError("VNET Bridge device require a PCI Bus");
return -1;
}
- virtio_state = (struct virtio_vnet_state *)V3_Malloc(sizeof(struct virtio_vnet_state));
- memset(virtio_state, 0, sizeof(struct virtio_vnet_state));
+ vbrg_state = (struct virtio_vnet_state *)V3_Malloc(sizeof(struct virtio_vnet_state));
+ memset(vbrg_state, 0, sizeof(struct virtio_vnet_state));
+
+ vbrg_state->vm = vm;
- struct vm_device * dev = v3_allocate_device(name, &dev_ops, virtio_state);
+ struct vm_device * dev = v3_allocate_device(name, &dev_ops, vbrg_state);
if (v3_attach_device(vm, dev) == -1) {
PrintError("Could not attach device %s\n", name);
int tmp_ports = num_ports;
int i;
-
// This gets the number of ports, rounded up to a power of 2
- virtio_state->io_range_size = 1; // must be a power of 2
+ vbrg_state->io_range_size = 1; // must be a power of 2
while (tmp_ports > 0) {
tmp_ports >>= 1;
- virtio_state->io_range_size <<= 1;
+ vbrg_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 & ((virtio_state->io_range_size >> 1) - 1)) == 0) {
- virtio_state->io_range_size >>= 1;
+ if ((num_ports & ((vbrg_state->io_range_size >> 1) - 1)) == 0) {
+ vbrg_state->io_range_size >>= 1;
}
-
for (i = 0; i < 6; i++) {
bars[i].type = PCI_BAR_NONE;
}
bars[0].type = PCI_BAR_IO;
bars[0].default_base_port = -1;
- bars[0].num_ports = virtio_state->io_range_size;
-
+ bars[0].num_ports = vbrg_state->io_range_size;
bars[0].io_read = virtio_io_read;
bars[0].io_write = virtio_io_write;
- bars[0].private_data = virtio_state;
+ bars[0].private_data = vbrg_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, virtio_state);
+ NULL, NULL, NULL, vbrg_state);
if (!pci_dev) {
PrintError("Could not register PCI Device\n");
pci_dev->config_header.vendor_id = VIRTIO_VENDOR_ID;
pci_dev->config_header.subsystem_vendor_id = VIRTIO_SUBVENDOR_ID;
-
-
pci_dev->config_header.device_id = VIRTIO_VNET_DEV_ID;
pci_dev->config_header.class = PCI_CLASS_MEMORY;
pci_dev->config_header.subclass = PCI_MEM_SUBCLASS_RAM;
-
pci_dev->config_header.subsystem_id = VIRTIO_VNET_SUBDEVICE_ID;
-
-
pci_dev->config_header.intr_pin = 1;
-
pci_dev->config_header.max_latency = 1; // ?? (qemu does it...)
- virtio_state->pci_dev = pci_dev;
- virtio_state->pci_bus = pci_bus;
+ vbrg_state->pci_dev = pci_dev;
+ vbrg_state->pci_bus = pci_bus;
}
- virtio_reset(virtio_state);
+ virtio_reset(vbrg_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
-
return 0;
}
-device_register("LNX_VIRTIO_VNET", vnet_init)
+device_register("LNX_VNET_BRG", vnet_brg_init)
