C++ (Cpp) network_tx_buf_gc示例

示例#1

文件： netfront.c 项目： carriercomm/mini-os

void netfront_xmit(struct netfront_dev *dev, unsigned char* data,int len)
{
    int flags;
    struct netif_tx_request *tx;
    RING_IDX i;
    int notify;
    unsigned short id;
    struct net_buffer* buf;
    void* page;
#ifdef CONFIG_NETMAP
    if (dev->netmap) {
        netmap_netfront_xmit(dev->na, data, len);
        return;
    }
#endif

    BUG_ON(len > PAGE_SIZE);

    down(&dev->tx_sem);

    local_irq_save(flags);
    id = get_id_from_freelist(dev->tx_freelist);
    local_irq_restore(flags);

    buf = &dev->tx_buffers[id];
    page = buf->page;

    i = dev->tx.req_prod_pvt;
    tx = RING_GET_REQUEST(&dev->tx, i);

    memcpy(page,data,len);

    tx->gref = buf->gref;

    tx->offset=0;
    tx->size = len;
    tx->flags=0;
    tx->id = id;
    dev->tx.req_prod_pvt = i + 1;

    wmb();

    RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(&dev->tx, notify);

    if(notify) notify_remote_via_evtchn(dev->evtchn);

    local_irq_save(flags);
    network_tx_buf_gc(dev);
    local_irq_restore(flags);
}

示例#2

文件： netfront.c 项目： a2k2/xen-unstable

void netfront_select_handler(evtchn_port_t port, struct pt_regs *regs, void *data)
{
    int flags;
    struct netfront_dev *dev = data;
    int fd = dev->fd;

    local_irq_save(flags);
    network_tx_buf_gc(dev);
    local_irq_restore(flags);

    if (fd != -1)
        files[fd].read = 1;
    wake_up(&netfront_queue);
}

示例#3

文件： netfront.c 项目： farewellkou/xen

void netfront_xmit(struct netfront_dev *dev, unsigned char* data,int len)
{
    int flags;
    struct netif_tx_request *tx;
    RING_IDX i;
    int notify;
    unsigned short id;
    struct net_buffer* buf;
    void* page;

    //printf("netfront_xmit\n"); //farewellkou

    BUG_ON(len > PAGE_SIZE);

    down(&dev->tx_sem);

    local_irq_save(flags);
    id = get_id_from_freelist(dev->tx_freelist);
    local_irq_restore(flags);

    buf = &dev->tx_buffers[id];
    page = buf->page;
    if (!page)
	page = buf->page = (char*) alloc_page();

    i = dev->tx.req_prod_pvt;
    tx = RING_GET_REQUEST(&dev->tx, i);

    memcpy(page,data,len);

    buf->gref = 
        tx->gref = gnttab_grant_access(dev->dom,virt_to_mfn(page),1);

    tx->offset=0;
    tx->size = len;
    tx->flags=0;
    tx->id = id;
    dev->tx.req_prod_pvt = i + 1;

    wmb();

    RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(&dev->tx, notify);

    if(notify) notify_remote_via_evtchn(dev->evtchn);

    local_irq_save(flags);
    network_tx_buf_gc(dev);
    local_irq_restore(flags);
}