X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fdevices%2Flnx_virtio_nic.c;h=b6fd304265095fcf09e66e2288286608c6c74bce;hb=c80aaab03156ec020bd4a76688ff6d2544955bf3;hp=317837dd9ef37614d4769db3ee13880bce430875;hpb=9f239e337227351e9440d9d3b174bb37942ceebe;p=palacios.git diff --git a/palacios/src/devices/lnx_virtio_nic.c b/palacios/src/devices/lnx_virtio_nic.c index 317837d..b6fd304 100644 --- a/palacios/src/devices/lnx_virtio_nic.c +++ b/palacios/src/devices/lnx_virtio_nic.c @@ -7,13 +7,13 @@ * and the University of New Mexico. You can find out more at * http://www.v3vee.org * - * Copyright (c) 2008, Jack Lange - * Copyright (c) 2008, Lei Xia - * Copyright (c) 2008, The V3VEE Project + * Copyright (c) 2010, Lei Xia + * Copyright (c) 2010, Cui Zheng + * Copyright (c) 2010, The V3VEE Project * All rights reserved. * - * Author: Jack Lange - * Lei Xia + * Author: Lei Xia + * Cui Zheng * * * This is free software. You are permitted to use, @@ -23,114 +23,109 @@ #include #include #include -#include #include - +#include +#include +#include +#include #include -#ifndef CONFIG_DEBUG_VIRTIO_BLK +#ifndef CONFIG_DEBUG_VIRTIO_NET #undef PrintDebug #define PrintDebug(fmt, args...) #endif -#define NIC_STATUS_OK 0 -#define NIC_STATUS_ERR 1 -#define NIC_STATUS_NOT_SUPPORTED 2 - - -/* The feature bitmap for virtio net */ -#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 */ -#define VIRTIO_NET_F_CTRL_VQ 17 /* Control channel available */ -#define VIRTIO_NET_F_CTRL_RX 18 /* Control channel RX mode support */ -#define VIRTIO_NET_F_CTRL_VLAN 19 /* Control channel VLAN filtering */ -#define VIRTIO_NET_F_CTRL_RX_EXTRA 20 /* Extra RX mode control support */ #define VIRTIO_NET_S_LINK_UP 1 /* Link is up */ - -/* Maximum packet size we can receive from tap device: header + 64k */ #define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10)) - struct virtio_net_hdr { -#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 /* Use csum_start, csum_offset */ uint8_t flags; #define VIRTIO_NET_HDR_GSO_NONE 0 /* Not a GSO frame */ -#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 */ 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 */ + uint16_t csum_start; /* Position to start checksumming from */ + uint16_t csum_offset; /* Offset after that to place checksum */ }__attribute__((packed)); - - -#define QUEUE_SIZE 256 -#define CTRL_QUEUE_SIZE 64 - - -struct v3_net_ops { - int (*send)(uint8_t * buf, uint32_t count, void * private_data); - int (*receive)(uint8_t * buf, uint32_t count, void * private_data); +/* This is the version of 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 */ }; - + +#define TX_QUEUE_SIZE 64 +#define RX_QUEUE_SIZE 1024 +#define CTRL_QUEUE_SIZE 64 #define ETH_ALEN 6 +#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. */ + struct virtio_net_config { - uint8_t mac[ETH_ALEN]; - // See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above + uint8_t mac[ETH_ALEN]; /* VIRTIO_NET_F_MAC */ uint16_t status; } __attribute__((packed)); +struct virtio_dev_state { + struct vm_device * pci_bus; + struct list_head dev_list; + struct v3_vm_info *vm; +}; + struct virtio_net_state { struct virtio_net_config net_cfg; struct virtio_config virtio_cfg; - struct vm_device * pci_bus; - struct pci_device * pci_dev; + struct vm_device * dev; + struct pci_device * pci_dev; + int io_range_size; - 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, pkts to guest */ + struct virtio_queue tx_vq; /* idx 1, pkts from guest */ + struct virtio_queue ctrl_vq; /* idx 2 */ - struct v3_net_ops * net_ops; + int buffed_rx; + int tx_disabled; /* stop TX pkts from guest */ - int io_range_size; + uint64_t pkt_sent, pkt_recv, pkt_drop; - void *private_data; + struct v3_dev_net_ops * net_ops; + v3_lock_t rx_lock, tx_lock; + + 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_free(struct vm_device * dev) { - return -1; + return 0; } -static int virtio_reset(struct vm_device * dev) +static int virtio_init_state(struct virtio_net_state * virtio) { - struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data; + 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; @@ -150,98 +145,61 @@ static int virtio_reset(struct vm_device * dev) virtio->ctrl_vq.pfn = 0; virtio->ctrl_vq.cur_avail_idx = 0; - virtio->virtio_cfg.status = VIRTIO_NET_S_LINK_UP; virtio->virtio_cfg.pci_isr = 0; - virtio->private_data = NULL; - - return 0; -} - -static int read_op(struct vm_device * dev, uint8_t * buf, uint32_t len) -{ - struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data; - int ret = -1; - - PrintDebug("Receving pkt from guest\n"); - - ret = virtio->net_ops->receive(buf, len, virtio->private_data); - return ret; -} - - -static int write_op(struct vm_device *dev, uint8_t *buf, uint32_t len) -{ - struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data; - int ret = -1; + + virtio->virtio_cfg.host_features = 0; // (1 << VIRTIO_NET_F_MAC); - PrintDebug("Receving pkt from guest\n"); + 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"); + } - ret = virtio->net_ops->send(buf, len, virtio->private_data); + virtio->pkt_sent = virtio->pkt_recv = virtio->pkt_drop = 0; + virtio->buffed_rx = 0; - return ret; + return 0; } - -//sending guest's packet to network sink -static int handle_pkt_write(struct vm_device *dev, struct virtio_net_hdr *hdr, - struct vring_desc *buf_desc, uint8_t *status) +static int +pkt_tx(struct guest_info * core, + struct virtio_net_state * virtio, + struct vring_desc * buf_desc) { - //struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data; uint8_t * buf = NULL; + uint32_t len = buf_desc->length; - PrintDebug("Handling Virtio Net write\n"); - - if (guest_pa_to_host_va(dev->vm, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) { + if (v3_gpa_to_hva(core, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) { PrintError("Could not translate buffer address\n"); - return -1; - } - - PrintDebug("Length=%d\n", buf_desc->length); - - if (write_op(dev, buf, buf_desc->length) == -1) { - *status = NIC_STATUS_ERR; - return -1; - } else { - *status = NIC_STATUS_OK; + return -ERR_VIRTIO_OTHER; } - PrintDebug("Returning Status: %d\n", *status); - - return 0; + return virtio->net_ops->send(buf, len, virtio->backend_data); } - -//get packet from network, and send to guest -static int handle_pkt_read(struct vm_device *dev, struct virtio_net_hdr *hdr, - struct vring_desc *buf_desc, uint8_t *status) +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) { - //struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data; - uint8_t * buf = NULL; - - PrintDebug("Handling Virtio Net read\n"); + uint32_t len; + uint8_t * desc_buf = NULL; - if (guest_pa_to_host_va(dev->vm, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) { + if (v3_gpa_to_hva(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 - offset):buf_len; + memcpy(desc_buf+offset, buf, len); - PrintDebug("Length=%d\n", buf_desc->length); - - if (read_op(dev, buf, buf_desc->length) == -1) { - *status = NIC_STATUS_ERR; - return -1; - } else { - *status = NIC_STATUS_OK; - } - - PrintDebug("Returning Status: %d\n", *status); - - return 0; + return len; } -static int get_desc_count(struct virtio_queue * q, int index) -{ + +static int get_desc_count(struct virtio_queue * q, int index) { struct vring_desc * tmp_desc = &(q->desc[index]); int cnt = 1; @@ -253,255 +211,249 @@ static int get_desc_count(struct virtio_queue * q, int index) return cnt; } +static inline void enable_cb(struct virtio_queue *queue){ + queue->used->flags &= ~ VRING_NO_NOTIFY_FLAG; +} -static int handle_ctrl(struct vm_device * dev) { +static inline void disable_cb(struct virtio_queue *queue) { + queue->used->flags |= VRING_NO_NOTIFY_FLAG; +} - return 0; +/* 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); } -// TODO: handle receiving, not done yet -//send packet to guest -static int handle_pkt_rx(struct vm_device * dev) + +/* 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); + + virtio->net_ops->start_rx(virtio->backend_data); + //disable_cb(&virtio->rx_vq); + + v3_unlock_irqrestore(virtio->rx_lock, flags); + + return 0; +} - if (handle_pkt_read(dev, NULL, 0, NULL) == -1) { - PrintError("Error handling nic operation\n"); - return -1; - } +static int handle_ctrl(struct guest_info *core, + struct virtio_net_state * virtio) { + return 0; } -//get packet from guest -static int handle_pkt_tx(struct vm_device * dev) +static int handle_pkt_tx(struct guest_info *core, + struct virtio_net_state * virtio_state) { - struct virtio_net_state *virtio = (struct virtio_net_state *)dev->private_data; - struct virtio_queue *q = &(virtio->rx_vq); + struct virtio_queue * q = &(virtio_state->tx_vq); + struct virtio_net_hdr * hdr = NULL; + int recved = 0; + unsigned long flags; + + if (!q->ring_avail_addr) + return -ERR_VIRTIO_TXQ_NOSET; - PrintDebug("VIRTIO NIC KICK: cur_index=%d (mod=%d), avail_index=%d\n", - q->cur_avail_idx, q->cur_avail_idx % QUEUE_SIZE, q->avail->index); + if(virtio_state->tx_disabled) + return -ERR_VIRTIO_TXQ_DISABLED; - while (q->cur_avail_idx < q->avail->index) { + flags = v3_lock_irqsave(virtio_state->tx_lock); + 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; - struct virtio_net_hdr hdr; addr_t hdr_addr = 0; - uint16_t desc_idx = q->avail->ring[q->cur_avail_idx % QUEUE_SIZE]; + uint16_t desc_idx = q->avail->ring[q->cur_avail_idx % q->queue_size]; int desc_cnt = get_desc_count(q, desc_idx); - int i = 0; - uint8_t * status_ptr = NULL; - uint8_t status = NIC_STATUS_OK; uint32_t req_len = 0; - - PrintDebug("Descriptor Count=%d, index=%d\n", desc_cnt, q->cur_avail_idx % QUEUE_SIZE); + int i = 0; hdr_desc = &(q->desc[desc_idx]); - - PrintDebug("Header Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", hdr_desc, - (void *)(hdr_desc->addr_gpa), hdr_desc->length, hdr_desc->flags, hdr_desc->next); - - if (guest_pa_to_host_va(dev->vm, 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; } - // We copy the block op header out because we are going to modify its contents - memcpy(&hdr, (void *)hdr_addr, sizeof(struct virtio_net_hdr)); - - PrintDebug("NIC Op Hdr (ptr=%p) type=%d, sector=%p\n", (void *)hdr_addr, hdr.hdr_len, (void *)hdr.csum_start); - + hdr = (struct virtio_net_hdr*)hdr_addr; desc_idx = hdr_desc->next; - for (i = 0; i < desc_cnt - 2; i++) { - uint8_t tmp_status = NIC_STATUS_OK; - - buf_desc = &(q->desc[desc_idx]); - - PrintDebug("Buffer Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", buf_desc, - (void *)(buf_desc->addr_gpa), buf_desc->length, buf_desc->flags, buf_desc->next); + if(desc_cnt > 2){ + PrintError("VNIC: merged rx buffer not supported\n"); + goto exit_error; + } - if (handle_pkt_write(dev, &hdr, buf_desc, &tmp_status) == -1) { + /* 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"); - return -1; - } - - if (tmp_status != NIC_STATUS_OK) { - status = tmp_status; + goto exit_error; } req_len += buf_desc->length; desc_idx = buf_desc->next; } + virtio_state->pkt_sent ++; + recved ++; - status_desc = &(q->desc[desc_idx]); - - PrintDebug("Status Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", status_desc, - (void *)(status_desc->addr_gpa), status_desc->length, status_desc->flags, status_desc->next); - - if (guest_pa_to_host_va(dev->vm, status_desc->addr_gpa, (addr_t *)&(status_ptr)) == -1) { - PrintError("Could not translate status address\n"); - return -1; - } - - req_len += status_desc->length; - *status_ptr = status; - - q->used->ring[q->used->index % QUEUE_SIZE].id = q->avail->ring[q->cur_avail_idx % QUEUE_SIZE]; - q->used->ring[q->used->index % QUEUE_SIZE].length = req_len; // What do we set this to???? - - q->used->index++; - q->cur_avail_idx++; + 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 ++; + + q->cur_avail_idx ++; } + v3_unlock_irqrestore(virtio_state->tx_lock, flags); + + if(!recved) + return 0; + if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) { - PrintDebug("Raising IRQ %d\n", virtio->pci_dev->config_header.intr_line); - v3_pci_raise_irq(virtio->pci_bus, 0, virtio->pci_dev); - virtio->virtio_cfg.pci_isr = 0x1; + v3_pci_raise_irq(virtio_state->virtio_dev->pci_bus, 0, virtio_state->pci_dev); + virtio_state->virtio_cfg.pci_isr = 0x1; } return 0; + +exit_error: + + v3_unlock_irqrestore(virtio_state->tx_lock, flags); + return -ERR_VIRTIO_OTHER; } -static int virtio_setup_queue(struct vm_device * dev, struct virtio_queue *queue, addr_t pfn, addr_t page_addr) -{ +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) { queue->pfn = pfn; - queue->ring_desc_addr = page_addr ; - queue->ring_avail_addr = page_addr + (QUEUE_SIZE * sizeof(struct vring_desc)); - queue->ring_used_addr = (queue->ring_avail_addr + \ - sizeof(struct vring_avail) + \ - (QUEUE_SIZE * sizeof(uint16_t))); - + queue->ring_desc_addr = page_addr; + queue->ring_avail_addr = page_addr + (queue->queue_size * sizeof(struct vring_desc)); + queue->ring_used_addr = ((queue->ring_avail_addr) + + (sizeof(struct vring_avail)) + + (queue->queue_size * sizeof(uint16_t))); + // round up to next page boundary. queue->ring_used_addr = (queue->ring_used_addr + 0xfff) & ~0xfff; - - if (guest_pa_to_host_va(dev->vm, 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(dev->vm, 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(dev->vm, 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; } PrintDebug("RingDesc_addr=%p, Avail_addr=%p, Used_addr=%p\n", - (void *)(queue->ring_desc_addr), - (void *)(queue->ring_avail_addr), - (void *)(queue->ring_used_addr)); - + (void *)(queue->ring_desc_addr), + (void *)(queue->ring_avail_addr), + (void *)(queue->ring_used_addr)); + PrintDebug("RingDesc=%p, Avail=%p, Used=%p\n", - queue->desc, queue->avail, queue->used); - + queue->desc, queue->avail, queue->used); + return 0; } - - -static int virtio_io_write(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 vm_device * dev = (struct vm_device *)private_data; - struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data; + struct virtio_net_state * virtio = (struct virtio_net_state *)private_data; int port_idx = port % virtio->io_range_size; - - PrintDebug("VIRTIO NIC Write for port %d (index=%d) len=%d, value=%x\n", + 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: if (length != 4) { PrintError("Illegal write length for guest features\n"); 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: - if (length == 4) { - addr_t pfn = *(uint32_t *)src; - addr_t page_addr = (pfn << VIRTIO_PAGE_SHIFT); - - uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector; - switch (queue_idx) { - case 0: - virtio_setup_queue(dev, &virtio->rx_vq, pfn, page_addr); - break; - case 1: - virtio_setup_queue(dev, &virtio->tx_vq, pfn, page_addr); - break; - case 2: - virtio_setup_queue(dev, &virtio->ctrl_vq, pfn, page_addr); - break; - - default: - break; - } - } else { + if (length != 4) { PrintError("Illegal write length for page frame number\n"); return -1; } + addr_t pfn = *(uint32_t *)src; + addr_t page_addr = (pfn << VIRTIO_PAGE_SHIFT); + 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); + break; + case 1: + virtio_setup_queue(core, virtio, &virtio->tx_vq, pfn, page_addr); + //disable_cb(&virtio->tx_vq); + break; + case 2: + virtio_setup_queue(core, virtio, &virtio->ctrl_vq, pfn, page_addr); + break; + default: + break; + } 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; } - break; - case VRING_Q_NOTIFY_PORT: - PrintDebug("Handling Kick\n"); - uint16_t queue_idx = *(uint16_t *)src; - if (queue_idx == 0){ - if (handle_pkt_rx(dev) == -1) { - PrintError("Could not handle NIC Notification\n"); - return -1; - } - }else if (queue_idx == 1){ - if (handle_pkt_tx(dev) == -1) { + + case VRING_Q_NOTIFY_PORT: + { + uint16_t queue_idx = *(uint16_t *)src; + if (queue_idx == 0){ + handle_rx_kick(core, virtio); + } else if (queue_idx == 1){ + if (handle_pkt_tx(core, virtio) == -1) { PrintError("Could not handle NIC Notification\n"); return -1; } - }else if (queue_idx == 2){ - if (handle_ctrl(dev) == -1) { + } else if (queue_idx == 2){ + if (handle_ctrl(core, virtio) == -1) { PrintError("Could not handle NIC Notification\n"); return -1; } - }else { - PrintError("Virtio NIC device only uses 3 queue, selected %d\n", - queue_idx); + } else { + PrintError("Wrong queue index %d\n", queue_idx); + } + break; } - - break; + case VIRTIO_STATUS_PORT: virtio->virtio_cfg.status = *(uint8_t *)src; - if (virtio->virtio_cfg.status == 0) { PrintDebug("Resetting device\n"); - virtio_reset(dev); + virtio_init_state(virtio); } - break; case VIRTIO_ISR_PORT: virtio->virtio_cfg.pci_isr = *(uint8_t *)src; break; + default: return -1; break; @@ -510,215 +462,369 @@ static int virtio_io_write(uint16_t port, void * src, uint_t length, void * priv return length; } - -static int virtio_io_read(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 vm_device * dev = (struct vm_device *)private_data; - struct virtio_net_state * virtio = (struct virtio_net_state *)dev->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 Read for port %d (index =%d), length=%d\n", + PrintDebug("Virtio NIC %p: Read for port %d (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; } - *(uint32_t *)dst = virtio->virtio_cfg.host_features; - break; - case VRING_PG_NUM_PORT: + case VRING_PG_NUM_PORT: if (length != 4) { PrintError("Illegal read length for page frame number\n"); return -1; } - switch (queue_idx) { case 0: - *(uint32_t *)dst = virtio->rx_vq.pfn; - break; - case 1: - *(uint32_t *)dst = virtio->tx_vq.pfn; - break; - case 2: - *(uint32_t *)dst = virtio->ctrl_vq.pfn; - break; - default: - break; - } - + *(uint32_t *)dst = virtio->rx_vq.pfn; + break; + case 1: + *(uint32_t *)dst = virtio->tx_vq.pfn; + break; + case 2: + *(uint32_t *)dst = virtio->ctrl_vq.pfn; + break; + default: + break; + } break; + case VRING_SIZE_PORT: if (length != 2) { PrintError("Illegal read length for vring size\n"); return -1; } - switch (queue_idx) { case 0: - *(uint16_t *)dst = virtio->rx_vq.queue_size; - break; - case 1: - *(uint32_t *)dst = virtio->tx_vq.queue_size; - break; - case 2: - *(uint32_t *)dst = virtio->ctrl_vq.queue_size; - break; - default: - break; - } - + *(uint16_t *)dst = virtio->rx_vq.queue_size; + break; + case 1: + *(uint16_t *)dst = virtio->tx_vq.queue_size; + break; + case 2: + *(uint16_t *)dst = virtio->ctrl_vq.queue_size; + break; + default: + break; + } break; + case VIRTIO_STATUS_PORT: if (length != 1) { PrintError("Illegal read length for status\n"); return -1; } - *(uint8_t *)dst = virtio->virtio_cfg.status; break; - + case VIRTIO_ISR_PORT: *(uint8_t *)dst = virtio->virtio_cfg.pci_isr; virtio->virtio_cfg.pci_isr = 0; - v3_pci_lower_irq(virtio->pci_bus, 0, virtio->pci_dev); + v3_pci_lower_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev); break; default: - PrintError("Read of Unhandled Virtio Read\n"); - return -1; + PrintError("Virtio NIC: Read of Unhandled Virtio Read:%d\n", port_idx); + return -1; } return length; } -static struct v3_device_ops dev_ops = { - .free = virtio_free, - .reset = virtio_reset, - .start = NULL, - .stop = NULL, -}; +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 + flags = v3_lock_irqsave(virtio->rx_lock); -int v3_virtio_register_nic(struct vm_device *dev, struct v3_net_ops *ops, void *private_data) { - struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data; - - virtio->net_ops = ops; + virtio->pkt_recv ++; + if (!raw) + data_len -= hdr_len; - return 0; -} + if (!raw) + memcpy(&hdr, buf, sizeof(struct virtio_net_hdr_mrg_rxbuf)); + else + 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; + } + 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; -static int virtio_init(struct guest_info * vm, void *cfg_data) { - struct vm_device * pci_bus = v3_find_dev(vm, (char *)cfg_data); - struct virtio_net_state * virtio_state = NULL; - struct pci_device * pci_dev = NULL; + 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; + } - PrintDebug("Initializing VIRTIO Network device\n"); + 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; + 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); + offset += len; + if (offset < data_len) { + buf_desc->flags = VIRTIO_NEXT_FLAG; + } + 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 (pci_bus == NULL) { - PrintError("VirtIO network devices require a PCI Bus"); - return -1; + /* 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); + } + virtio->buffed_rx = 0; + } + } 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; } - - virtio_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state)); - memset(virtio_state, 0, sizeof(struct virtio_net_state)); - struct vm_device * dev = v3_allocate_device("LNX_VIRTIO_NIC", &dev_ops, virtio_state); - if (v3_attach_device(vm, dev) == -1) { - PrintError("Could not attach device %s\n", "LNX_VIRTIO_NIC"); - return -1; + if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) { + PrintDebug("Raising IRQ %d\n", virtio->pci_dev->config_header.intr_line); + v3_pci_raise_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev); + virtio->virtio_cfg.pci_isr = 0x1; } + ret_val = offset; + +exit: - // PCI initialization - { - struct v3_pci_bar bars[6]; - int num_ports = sizeof(struct virtio_config); - int tmp_ports = num_ports; - int i; + v3_unlock_irqrestore(virtio->rx_lock, flags); + + return ret_val; +} - // 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 - while (tmp_ports > 0) { - tmp_ports >>= 1; - virtio_state->io_range_size <<= 1; - } +static struct v3_device_ops dev_ops = { + .free = virtio_free, +}; + + +/* 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; - // 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; - } + handle_pkt_tx(&(vm->cores[0]), virtio); +} - for (i = 0; i < 6; i++) { - bars[i].type = PCI_BAR_NONE; - } +static void virtio_start_tx(void * data){ + struct virtio_net_state * virtio = (struct virtio_net_state *)data; + unsigned long flags; - PrintDebug("Virtio-NIC io_range_size = %d\n", virtio_state->io_range_size); + flags = v3_lock_irqsave(virtio->tx_lock); + virtio->tx_disabled = 0; - bars[0].type = PCI_BAR_IO; - bars[0].default_base_port = -1; - bars[0].num_ports = virtio_state->io_range_size; + /* 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); +} - bars[0].io_read = virtio_io_read; - bars[0].io_write = virtio_io_write; - bars[0].private_data = dev; +static void virtio_stop_tx(void * data){ + struct virtio_net_state * virtio = (struct virtio_net_state *)data; + unsigned long flags; - pci_dev = v3_pci_register_device(pci_bus, PCI_STD_DEVICE, - 0, PCI_AUTO_DEV_NUM, 0, - "LNX_VIRTIO_NIC", bars, - NULL, NULL, NULL, dev, NULL); + flags = v3_lock_irqsave(virtio->tx_lock); + virtio->tx_disabled = 1; - if (!pci_dev) { - PrintError("Could not register PCI Device\n"); - return -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); + } + + v3_unlock_irqrestore(virtio->tx_lock, flags); +} + + + + +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 num_ports = sizeof(struct virtio_config); + 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 + while (tmp_ports > 0) { + tmp_ports >>= 1; + net_state->io_range_size <<= 1; + } - pci_dev->config_header.vendor_id = VIRTIO_VENDOR_ID; - pci_dev->config_header.subsystem_vendor_id = VIRTIO_SUBVENDOR_ID; + // 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; + } + + for (i = 0; i < 6; i++) { + bars[i].type = PCI_BAR_NONE; + } + + 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].num_ports = net_state->io_range_size; + bars[0].io_read = virtio_io_read; + bars[0].io_write = virtio_io_write; + 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, + "LNX_VIRTIO_NIC", bars, + NULL, NULL, NULL, net_state); + + if (!pci_dev) { + PrintError("Virtio NIC: Could not register PCI Device\n"); + return -1; + } + + PrintDebug("Virtio NIC: registered to PCI bus\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_NET_DEV_ID; - pci_dev->config_header.class = PCI_CLASS_NETWORK; - pci_dev->config_header.subclass = PCI_NET_SUBCLASS_OTHER; + pci_dev->config_header.device_id = VIRTIO_NET_DEV_ID; + pci_dev->config_header.class = PCI_CLASS_NETWORK; + pci_dev->config_header.subclass = PCI_NET_SUBCLASS_OTHER; + pci_dev->config_header.subsystem_id = VIRTIO_NET_SUBDEVICE_ID; + 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_dev = virtio; + + uchar_t mac[6] = {0x11,0x11,0x11,0x11,0x11,0x11}; + memcpy(net_state->net_cfg.mac, mac, 6); + + memcpy(pci_dev->config_data, net_state->net_cfg.mac, ETH_ALEN); + + virtio_init_state(net_state); + + return 0; +} + +static int connect_fn(struct v3_vm_info * info, + void * frontend_data, + struct v3_dev_net_ops * ops, + v3_cfg_tree_t * cfg, + void * private_data) { + struct virtio_dev_state * virtio = (struct virtio_dev_state *)frontend_data; + struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state)); + + memset(net_state, 0, sizeof(struct virtio_net_state)); + register_dev(virtio, net_state); - // TODO:how to define new one for virtio net device - pci_dev->config_header.subsystem_id = VIRTIO_BLOCK_SUBDEVICE_ID; + net_state->net_ops = ops; + net_state->backend_data = private_data; + 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; - pci_dev->config_header.intr_pin = 1; + return 0; +} - pci_dev->config_header.max_latency = 1; // ?? (qemu does it...) +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"); + PrintDebug("Virtio NIC: Initializing VIRTIO Network device: %s\n", dev_id); - virtio_state->pci_dev = pci_dev; - virtio_state->pci_bus = pci_bus; + if (pci_bus == NULL) { + PrintError("Virtio NIC: VirtIO devices require a PCI Bus"); + return -1; } - virtio_state->virtio_cfg.host_features = 0; //no features support now + virtio_state = (struct virtio_dev_state *)V3_Malloc(sizeof(struct virtio_dev_state)); + memset(virtio_state, 0, sizeof(struct virtio_dev_state)); - virtio_state->rx_vq.queue_size = QUEUE_SIZE; - virtio_state->tx_vq.queue_size = QUEUE_SIZE; - virtio_state->ctrl_vq.queue_size = CTRL_QUEUE_SIZE; - + INIT_LIST_HEAD(&(virtio_state->dev_list)); + virtio_state->pci_bus = pci_bus; + virtio_state->vm = vm; - virtio_reset(dev); + struct vm_device * dev = v3_add_device(vm, dev_id, &dev_ops, virtio_state); -// TODO: net ops - virtio_state->net_ops = NULL; + 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, 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; + } + return 0; } - device_register("LNX_VIRTIO_NIC", virtio_init) - +