#include <rte_ether.h>
+/* 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_MTU 3 /* Initial MTU advice. */
+#define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */
+#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_F_GUEST_ANNOUNCE 21 /* Guest can announce device on the network */
+#define VIRTIO_NET_F_MQ 22 /* Device supports Receive Flow Steering */
+#define VIRTIO_NET_F_CTRL_MAC_ADDR 23 /* Set MAC address */
+
+/*
+ * Do we get callbacks when the ring is completely used,
+ * even if we've suppressed them?
+ */
+#define VIRTIO_F_NOTIFY_ON_EMPTY 24
+
+/* Can the device handle any descriptor layout? */
+#define VIRTIO_F_ANY_LAYOUT 27
+
+/* We support indirect buffer descriptors */
+#define VIRTIO_RING_F_INDIRECT_DESC 28
+
+#define VIRTIO_F_VERSION_1 32
+#define VIRTIO_F_IOMMU_PLATFORM 33
+#define VIRTIO_F_RING_PACKED 34
+
+/*
+ * Some VirtIO feature bits (currently bits 28 through 31) are
+ * reserved for the transport being used (eg. virtio_ring), the
+ * rest are per-device feature bits.
+ */
+#define VIRTIO_TRANSPORT_F_START 28
+#define VIRTIO_TRANSPORT_F_END 34
+
+/*
+ * Inorder feature indicates that all buffers are used by the device
+ * in the same order in which they have been made available.
+ */
+#define VIRTIO_F_IN_ORDER 35
+
+/*
+ * This feature indicates that memory accesses by the driver and the device
+ * are ordered in a way described by the platform.
+ */
+#define VIRTIO_F_ORDER_PLATFORM 36
+
+/*
+ * This feature indicates that the driver passes extra data (besides
+ * identifying the virtqueue) in its device notifications.
+ */
+#define VIRTIO_F_NOTIFICATION_DATA 38
+
+/* Device set linkspeed and duplex */
+#define VIRTIO_NET_F_SPEED_DUPLEX 63
+
+/*
+ * The Guest publishes the used index for which it expects an interrupt
+ * at the end of the avail ring. Host should ignore the avail->flags field
+ *
+ * The Host publishes the avail index for which it expects a kick
+ * at the end of the used ring. Guest should ignore the used->flags field.
+ */
+#define VIRTIO_RING_F_EVENT_IDX 29
+
+#define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
+#define VIRTIO_NET_S_ANNOUNCE 2 /* Announcement is needed */
+
+/*
+ * Each virtqueue indirect descriptor list must be physically contiguous.
+ * To allow us to malloc(9) each list individually, limit the number
+ * supported to what will fit in one page. With 4KB pages, this is a limit
+ * of 256 descriptors. If there is ever a need for more, we can switch to
+ * contigmalloc(9) for the larger allocations, similar to what
+ * bus_dmamem_alloc(9) does.
+ *
+ * Note the sizeof(struct vring_desc) is 16 bytes.
+ */
+#define VIRTIO_MAX_INDIRECT ((int)(rte_mem_page_size() / 16))
+
+/*
+ * Maximum number of virtqueues per device.
+ */
+#define VIRTIO_MAX_VIRTQUEUE_PAIRS 8
+#define VIRTIO_MAX_VIRTQUEUES (VIRTIO_MAX_VIRTQUEUE_PAIRS * 2 + 1)
+
+/* VirtIO device IDs. */
+#define VIRTIO_ID_NETWORK 0x01
+#define VIRTIO_ID_BLOCK 0x02
+#define VIRTIO_ID_CONSOLE 0x03
+#define VIRTIO_ID_ENTROPY 0x04
+#define VIRTIO_ID_BALLOON 0x05
+#define VIRTIO_ID_IOMEMORY 0x06
+#define VIRTIO_ID_9P 0x09
+
+/* Status byte for guest to report progress. */
+#define VIRTIO_CONFIG_STATUS_RESET 0x00
+#define VIRTIO_CONFIG_STATUS_ACK 0x01
+#define VIRTIO_CONFIG_STATUS_DRIVER 0x02
+#define VIRTIO_CONFIG_STATUS_DRIVER_OK 0x04
+#define VIRTIO_CONFIG_STATUS_FEATURES_OK 0x08
+#define VIRTIO_CONFIG_STATUS_DEV_NEED_RESET 0x40
+#define VIRTIO_CONFIG_STATUS_FAILED 0x80
+
+/* The bit of the ISR which indicates a device has an interrupt. */
+#define VIRTIO_ISR_INTR 0x1
+/* The bit of the ISR which indicates a device configuration change. */
+#define VIRTIO_ISR_CONFIG 0x2
+/* Vector value used to disable MSI for queue. */
+#define VIRTIO_MSI_NO_VECTOR 0xFFFF
+
+/* The alignment to use between consumer and producer parts of vring. */
+#define VIRTIO_VRING_ALIGN 4096
+
+/*
+ * This structure is just a reference to read net device specific
+ * config space; it is just a shadow structure.
+ *
+ */
+struct virtio_net_config {
+ /* The config defining mac address (if VIRTIO_NET_F_MAC) */
+ uint8_t mac[RTE_ETHER_ADDR_LEN];
+ /* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */
+ uint16_t status;
+ uint16_t max_virtqueue_pairs;
+ uint16_t mtu;
+ /*
+ * speed, in units of 1Mb. All values 0 to INT_MAX are legal.
+ * Any other value stands for unknown.
+ */
+ uint32_t speed;
+ /*
+ * 0x00 - half duplex
+ * 0x01 - full duplex
+ * Any other value stands for unknown.
+ */
+ uint8_t duplex;
+
+} __rte_packed;
+
struct virtio_hw {
struct virtqueue **vqs;
uint64_t guest_features;
uint8_t started;
uint8_t weak_barriers;
uint8_t vlan_strip;
+ bool rx_ol_scatter;
uint8_t has_tx_offload;
uint8_t has_rx_offload;
uint8_t use_vec_rx;
uint8_t mac_addr[RTE_ETHER_ADDR_LEN];
uint32_t speed; /* link speed in MB */
uint8_t duplex;
- uint8_t use_msix;
+ uint8_t intr_lsc;
uint16_t max_mtu;
+ size_t max_rx_pkt_len;
/*
* App management thread and virtio interrupt handler thread
* both can change device state, this lock is meant to avoid
extern struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
+static inline int
+virtio_with_feature(struct virtio_hw *hw, uint64_t bit)
+{
+ return (hw->guest_features & (1ULL << bit)) != 0;
+}
+
+static inline int
+virtio_with_packed_queue(struct virtio_hw *hw)
+{
+ return virtio_with_feature(hw, VIRTIO_F_RING_PACKED);
+}
+
+uint64_t virtio_negotiate_features(struct virtio_hw *hw, uint64_t host_features);
+uint8_t virtio_get_status(struct virtio_hw *hw);
+void virtio_set_status(struct virtio_hw *hw, uint8_t status);
+void virtio_write_dev_config(struct virtio_hw *hw, size_t offset, const void *src, int length);
+void virtio_read_dev_config(struct virtio_hw *hw, size_t offset, void *dst, int length);
+void virtio_reset(struct virtio_hw *hw);
+void virtio_reinit_complete(struct virtio_hw *hw);
+uint8_t virtio_get_isr(struct virtio_hw *hw);
#endif /* _VIRTIO_H_ */
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