/* * Copyright (c) 2018 Jakub Jermar * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * - The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef _VIRTIO_NET_H_ #define _VIRTIO_NET_H_ #include <virtio-pci.h> #include <abi/cap.h> #include <nic/nic.h> #define RX_BUFFERS 8 #define TX_BUFFERS 8 #define CT_BUFFERS 4 /** Device handles packets with partial checksum. */ #define VIRTIO_NET_F_CSUM (1U << 0) /** Driver handles packets with partial checksum. */ #define VIRTIO_NET_F_GUEST_CSUM (1U << 2) /** Device has given MAC address. */ #define VIRTIO_NET_F_MAC (1U << 5) /** Control channel is available */ #define VIRTIO_NET_F_CTRL_VQ (1U << 17) #define VIRTIO_NET_HDR_GSO_NONE 0 typedef struct { uint8_t flags; uint8_t gso_type; uint16_t hdr_len; uint16_t gso_size; uint16_t csum_start; uint16_t csum_offset; uint16_t num_buffers; } virtio_net_hdr_t; typedef struct { uint8_t mac[ETH_ADDR]; } virtio_net_cfg_t; typedef struct { virtio_dev_t virtio_dev; void *rx_buf[RX_BUFFERS]; uintptr_t rx_buf_p[RX_BUFFERS]; void *tx_buf[TX_BUFFERS]; uintptr_t tx_buf_p[TX_BUFFERS]; void *ct_buf[CT_BUFFERS]; uintptr_t ct_buf_p[CT_BUFFERS]; uint16_t tx_free_head; uint16_t ct_free_head; int irq; cap_irq_handle_t irq_handle; } virtio_net_t; #endif