From: Lei Xia Date: Tue, 1 Dec 2009 05:40:40 +0000 (-0600) Subject: Add Virtio Network device and add virio_net config option X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=commitdiff_plain;h=9f239e337227351e9440d9d3b174bb37942ceebe;hp=8f7ca44fc807d2e015c135153ee631ef2001fe30 Add Virtio Network device and add virio_net config option --- diff --git a/Kconfig b/Kconfig index c2a6762..d997eea 100644 --- a/Kconfig +++ b/Kconfig @@ -102,11 +102,11 @@ config EXPERIMENTAL to more easily track changes and provide access to multiple developers config VNET - depends on EXPERIMENTAL - bool "Enable Vnet in Palacios" - default n - help - Enable the Vnet in Palacios + depends on EXPERIMENTAL + bool "Enable Vnet in Palacios" + default n + help + Enable the Vnet in Palacios config BUILT_IN_STDLIB bool "Enable Built in versions of stdlib functions" diff --git a/palacios/include/devices/lnx_virtio_nic.h b/palacios/include/devices/lnx_virtio_nic.h new file mode 100644 index 0000000..0b5b1d2 --- /dev/null +++ b/palacios/include/devices/lnx_virtio_nic.h @@ -0,0 +1,28 @@ +/* + * This file is part of the Palacios Virtual Machine Monitor developed + * by the V3VEE Project with funding from the United States National + * Science Foundation and the Department of Energy. + * + * The V3VEE Project is a joint project between Northwestern University + * 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 + * All rights reserved. + * + * Author: Jack Lange + * Lei Xia + * + * + * This is free software. You are permitted to use, + * redistribute, and modify it as specified in the file "V3VEE_LICENSE". + */ + +#ifndef __DEVICES_LNX_VIRTIO_NIC_H__ +#define __DEVICES_LNX_VIRTIO_NIC_H__ + + +#endif + diff --git a/palacios/src/devices/Makefile b/palacios/src/devices/Makefile index 0e716aa..d83960a 100644 --- a/palacios/src/devices/Makefile +++ b/palacios/src/devices/Makefile @@ -10,6 +10,7 @@ obj-$(CONFIG_KEYBOARD) += keyboard.o obj-$(CONFIG_LINUX_VIRTIO_BALLOON) += lnx_virtio_balloon.o obj-$(CONFIG_LINUX_VIRTIO_BLOCK) += lnx_virtio_blk.o obj-$(CONFIG_LINUX_VIRTIO_SYM) += lnx_virtio_sym.o +obj-$(CONFIG_LINUX_VIRTIO_NET) += lnx_virtio_nic.o obj-$(CONFIG_NVRAM) += nvram.o obj-$(CONFIG_OS_DEBUG) += os_debug.o obj-$(CONFIG_PCI) += pci.o @@ -26,4 +27,4 @@ obj-$(CONFIG_NET_HD) += net_hd.o obj-$(CONFIG_CGA) += cga.o obj-$(CONFIG_TELNET_CONSOLE) += telnet_cons.o -obj-$(CONFIG_PASSTHROUGH_PCI) += pci_passthrough.o \ No newline at end of file +obj-$(CONFIG_PASSTHROUGH_PCI) += pci_passthrough.o diff --git a/palacios/src/devices/lnx_virtio_nic.c b/palacios/src/devices/lnx_virtio_nic.c new file mode 100644 index 0000000..317837d --- /dev/null +++ b/palacios/src/devices/lnx_virtio_nic.c @@ -0,0 +1,724 @@ +/* + * This file is part of the Palacios Virtual Machine Monitor developed + * by the V3VEE Project with funding from the United States National + * Science Foundation and the Department of Energy. + * + * The V3VEE Project is a joint project between Northwestern University + * 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 + * All rights reserved. + * + * Author: Jack Lange + * Lei Xia + * + * + * This is free software. You are permitted to use, + * redistribute, and modify it as specified in the file "V3VEE_LICENSE". + */ + +#include +#include +#include +#include +#include + +#include + + +#ifndef CONFIG_DEBUG_VIRTIO_BLK +#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 */ +}__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); +}; + + +#define ETH_ALEN 6 + +struct virtio_net_config +{ + uint8_t mac[ETH_ALEN]; + // See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above + uint16_t status; +} __attribute__((packed)); + +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 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 v3_net_ops * net_ops; + + int io_range_size; + + void *private_data; +}; + + +static int virtio_free(struct vm_device * dev) +{ + + return -1; +} + +static int virtio_reset(struct vm_device * dev) +{ + struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data; + + virtio->rx_vq.ring_desc_addr = 0; + virtio->rx_vq.ring_avail_addr = 0; + virtio->rx_vq.ring_used_addr = 0; + virtio->rx_vq.pfn = 0; + virtio->rx_vq.cur_avail_idx = 0; + + virtio->tx_vq.ring_desc_addr = 0; + virtio->tx_vq.ring_avail_addr = 0; + virtio->tx_vq.ring_used_addr = 0; + virtio->tx_vq.pfn = 0; + virtio->tx_vq.cur_avail_idx = 0; + + virtio->ctrl_vq.ring_desc_addr = 0; + virtio->ctrl_vq.ring_avail_addr = 0; + virtio->ctrl_vq.ring_used_addr = 0; + 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; + + PrintDebug("Receving pkt from guest\n"); + + ret = virtio->net_ops->send(buf, len, virtio->private_data); + + return ret; +} + + +//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) +{ + //struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data; + uint8_t * buf = NULL; + + PrintDebug("Handling Virtio Net write\n"); + + if (guest_pa_to_host_va(dev->vm, 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; + } + + PrintDebug("Returning Status: %d\n", *status); + + return 0; +} + + + +//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) +{ + //struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data; + uint8_t * buf = NULL; + + PrintDebug("Handling Virtio Net read\n"); + + if (guest_pa_to_host_va(dev->vm, 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 (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; +} + +static int get_desc_count(struct virtio_queue * q, int index) +{ + struct vring_desc * tmp_desc = &(q->desc[index]); + int cnt = 1; + + while (tmp_desc->flags & VIRTIO_NEXT_FLAG) { + tmp_desc = &(q->desc[tmp_desc->next]); + cnt++; + } + + return cnt; +} + + +static int handle_ctrl(struct vm_device * dev) { + + + return 0; +} + +// TODO: handle receiving, not done yet +//send packet to guest +static int handle_pkt_rx(struct vm_device * dev) +{ + + if (handle_pkt_read(dev, NULL, 0, NULL) == -1) { + PrintError("Error handling nic operation\n"); + return -1; + } + + return 0; +} + +//get packet from guest +static int handle_pkt_tx(struct vm_device * dev) +{ + struct virtio_net_state *virtio = (struct virtio_net_state *)dev->private_data; + struct virtio_queue *q = &(virtio->rx_vq); + + 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); + + 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]; + 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); + + 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) { + PrintError("Could not translate block header address\n"); + return -1; + } + + // 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); + + 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 (handle_pkt_write(dev, &hdr, buf_desc, &tmp_status) == -1) { + PrintError("Error handling nic operation\n"); + return -1; + } + + if (tmp_status != NIC_STATUS_OK) { + status = tmp_status; + } + + req_len += buf_desc->length; + desc_idx = buf_desc->next; + } + + 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++; + } + + 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; + } + + return 0; +} + + +static int virtio_setup_queue(struct vm_device * dev, 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))); + + // 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) { + 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) { + 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) { + 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)); + + PrintDebug("RingDesc=%p, Avail=%p, Used=%p\n", + queue->desc, queue->avail, queue->used); + + return 0; +} + + + +static int virtio_io_write(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; + int port_idx = port % virtio->io_range_size; + + + PrintDebug("VIRTIO NIC Write for port %d (index=%d) len=%d, value=%x\n", + 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 { + PrintError("Illegal write length for page frame number\n"); + return -1; + } + 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", + 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) { + PrintError("Could not handle NIC Notification\n"); + return -1; + } + }else if (queue_idx == 2){ + if (handle_ctrl(dev) == -1) { + PrintError("Could not handle NIC Notification\n"); + return -1; + } + }else { + PrintError("Virtio NIC device only uses 3 queue, selected %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_reset(dev); + } + + break; + + case VIRTIO_ISR_PORT: + virtio->virtio_cfg.pci_isr = *(uint8_t *)src; + break; + default: + return -1; + break; + } + + return length; +} + + +static int virtio_io_read(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; + 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", + 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: + + 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; + } + + 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; + } + + 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); + break; + + default: + PrintError("Read of Unhandled Virtio Read\n"); + return -1; + } + + return length; +} + + +static struct v3_device_ops dev_ops = { + .free = virtio_free, + .reset = virtio_reset, + .start = NULL, + .stop = NULL, +}; + + +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; + + return 0; +} + + +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; + + PrintDebug("Initializing VIRTIO Network device\n"); + + if (pci_bus == NULL) { + PrintError("VirtIO network devices require a PCI Bus"); + return -1; + } + + 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; + } + + + // PCI initialization + { + 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 + 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; + } + + // 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; + } + + for (i = 0; i < 6; i++) { + bars[i].type = PCI_BAR_NONE; + } + + PrintDebug("Virtio-NIC io_range_size = %d\n", virtio_state->io_range_size); + + bars[0].type = PCI_BAR_IO; + bars[0].default_base_port = -1; + bars[0].num_ports = virtio_state->io_range_size; + + bars[0].io_read = virtio_io_read; + bars[0].io_write = virtio_io_write; + bars[0].private_data = dev; + + 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); + + if (!pci_dev) { + PrintError("Could not register PCI Device\n"); + return -1; + } + + 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; + + // TODO:how to define new one for virtio net device + pci_dev->config_header.subsystem_id = VIRTIO_BLOCK_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; + } + + virtio_state->virtio_cfg.host_features = 0; //no features support now + + 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; + + + virtio_reset(dev); + +// TODO: net ops + virtio_state->net_ops = NULL; + + return 0; +} + + +device_register("LNX_VIRTIO_NIC", virtio_init) +