--- /dev/null
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef __VIRTIO_STD_H__
+#define __VIRTIO_STD_H__
+
+#define foreach_virtio_net_features \
+ _ (VIRTIO_NET_F_CSUM, 0) /* Host handles pkts w/ partial csum */ \
+ _ (VIRTIO_NET_F_GUEST_CSUM, 1) /* Guest handles pkts w/ partial csum */ \
+ _ (VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, 2) /* Dynamic offload configuration. */ \
+ _ (VIRTIO_NET_F_MTU, 3) /* Initial MTU advice. */ \
+ _ (VIRTIO_NET_F_MAC, 5) /* Host has given MAC address. */ \
+ _ (VIRTIO_NET_F_GSO, 6) /* Host handles pkts w/ any GSO. */ \
+ _ (VIRTIO_NET_F_GUEST_TSO4, 7) /* Guest can handle TSOv4 in. */ \
+ _ (VIRTIO_NET_F_GUEST_TSO6, 8) /* Guest can handle TSOv6 in. */ \
+ _ (VIRTIO_NET_F_GUEST_ECN, 9) /* Guest can handle TSO[6] w/ ECN in. */ \
+ _ (VIRTIO_NET_F_GUEST_UFO, 10) /* Guest can handle UFO in. */ \
+ _ (VIRTIO_NET_F_HOST_TSO4, 11) /* Host can handle TSOv4 in. */ \
+ _ (VIRTIO_NET_F_HOST_TSO6, 12) /* Host can handle TSOv6 in. */ \
+ _ (VIRTIO_NET_F_HOST_ECN, 13) /* Host can handle TSO[6] w/ ECN in. */ \
+ _ (VIRTIO_NET_F_HOST_UFO, 14) /* Host can handle UFO in. */ \
+ _ (VIRTIO_NET_F_MRG_RXBUF, 15) /* Host can merge receive buffers. */ \
+ _ (VIRTIO_NET_F_STATUS, 16) /* virtio_net_config.status available */ \
+ _ (VIRTIO_NET_F_CTRL_VQ, 17) /* Control channel available */ \
+ _ (VIRTIO_NET_F_CTRL_RX, 18) /* Control channel RX mode support */ \
+ _ (VIRTIO_NET_F_CTRL_VLAN, 19) /* Control channel VLAN filtering */ \
+ _ (VIRTIO_NET_F_CTRL_RX_EXTRA, 20) /* Extra RX mode control support */ \
+ _ (VIRTIO_NET_F_GUEST_ANNOUNCE, 21) /* Guest can announce device on the network */ \
+ _ (VIRTIO_NET_F_MQ, 22) /* Device supports Receive Flow Steering */ \
+ _ (VIRTIO_NET_F_CTRL_MAC_ADDR, 23) /* Set MAC address */ \
+ _ (VIRTIO_F_NOTIFY_ON_EMPTY, 24) \
+ _ (VHOST_F_LOG_ALL, 26) /* Log all write descriptors */ \
+ _ (VIRTIO_F_ANY_LAYOUT, 27) /* Can the device handle any descriptor layout */ \
+ _ (VIRTIO_RING_F_INDIRECT_DESC, 28) /* Support indirect buffer descriptors */ \
+ _ (VIRTIO_RING_F_EVENT_IDX, 29) /* 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. */ \
+ _ (VHOST_USER_F_PROTOCOL_FEATURES, 30) \
+ _ (VIRTIO_F_VERSION_1, 32) /* v1.0 compliant. */ \
+ _ (VIRTIO_F_IOMMU_PLATFORM, 33) \
+ _ (VIRTIO_F_RING_PACKED, 34) \
+ _ (VIRTIO_F_IN_ORDER, 35) /* all buffers are used by the device in the */ \
+ /* same order in which they have been made available */ \
+ _ (VIRTIO_F_ORDER_PLATFORM, 36) /* memory accesses by the driver and the */ \
+ /* device are ordered in a way described by the platfor */ \
+ _ (VIRTIO_F_NOTIFICATION_DATA, 38) /* the driver passes extra data (besides */ \
+ /* identifying the virtqueue) in its device notifications. */ \
+ _ (VIRTIO_NET_F_SPEED_DUPLEX, 63) /* Device set linkspeed and duplex */
+
+typedef enum
+{
+#define _(f,n) f = n,
+ foreach_virtio_net_features
+#undef _
+} virtio_net_feature_t;
+
+#define VIRTIO_FEATURE(X) (1ULL << X)
+
+#define VRING_MAX_SIZE 32768
+
+#define VRING_DESC_F_NEXT 1
+#define VRING_DESC_F_WRITE 2
+#define VRING_DESC_F_INDIRECT 4
+
+#define VRING_DESC_F_AVAIL (1 << 7)
+#define VRING_DESC_F_USED (1 << 15)
+
+#define VRING_EVENT_F_ENABLE 0x0
+#define VRING_EVENT_F_DISABLE 0x1
+#define VRING_EVENT_F_DESC 0x2
+
+#define VRING_USED_F_NO_NOTIFY 1
+#define VRING_AVAIL_F_NO_INTERRUPT 1
+
+typedef struct
+{
+ u64 addr;
+ u32 len;
+ u16 flags;
+ u16 next;
+} vring_desc_t;
+
+typedef struct
+{
+ u16 flags;
+ u16 idx;
+ u16 ring[0];
+ /* u16 used_event; */
+} vring_avail_t;
+
+typedef struct
+{
+ u32 id;
+ u32 len;
+} vring_used_elem_t;
+
+typedef struct
+{
+ u16 flags;
+ u16 idx;
+ vring_used_elem_t ring[0];
+ /* u16 avail_event; */
+} vring_used_t;
+
+/* *INDENT-OFF* */
+typedef CLIB_PACKED (struct
+{
+ u64 addr; // packet data buffer address
+ u32 len; // packet data buffer size
+ u16 id; // buffer id
+ u16 flags; // flags
+}) vring_packed_desc_t;
+
+STATIC_ASSERT_SIZEOF (vring_packed_desc_t, 16);
+
+typedef CLIB_PACKED (struct
+{
+ u16 off_wrap;
+ u16 flags;
+}) vring_desc_event_t;
+
+#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 /* Use csum_start, csum_offset */
+#define VIRTIO_NET_HDR_F_DATA_VALID 2 /* Csum is valid */
+
+#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 */
+
+typedef CLIB_PACKED (struct
+{
+ u8 flags;
+ u8 gso_type;
+ u16 hdr_len; /* Ethernet + IP + tcp/udp hdrs */
+ u16 gso_size; /* Bytes to append to hdr_len per frame */
+ u16 csum_start; /* Position to start checksumming from */
+ u16 csum_offset; /* Offset after that to place checksum */
+ u16 num_buffers; /* Number of merged rx buffers */
+}) virtio_net_hdr_v1_t;
+
+typedef CLIB_PACKED (struct
+{
+ u8 flags;
+ u8 gso_type;
+ u16 hdr_len;
+ u16 gso_size;
+ u16 csum_start;
+ u16 csum_offset;
+}) virtio_net_hdr_t;
+
+typedef CLIB_PACKED (struct
+{
+ virtio_net_hdr_t hdr;
+ u16 num_buffers;
+}) virtio_net_hdr_mrg_rxbuf_t;
+
+/* *INDENT-ON* */
+
+typedef struct
+{
+ u16 num;
+ vring_desc_t *desc;
+ vring_avail_t *avail;
+ vring_used_t *used;
+} vring_t;
+
+static_always_inline void
+vring_init (vring_t * vr, u32 num, void *p, u32 align)
+{
+ vr->num = num;
+ vr->desc = p;
+ vr->avail = (vring_avail_t *) ((char *) p + num * sizeof (vring_desc_t));
+ vr->used =
+ (vring_used_t *) ((char *) p +
+ ((sizeof (vring_desc_t) * num +
+ sizeof (u16) * (3 + num) + align - 1) & ~(align -
+ 1)));
+}
+
+static_always_inline u16
+vring_size (u32 num, u32 align)
+{
+ return ((sizeof (vring_desc_t) * num + sizeof (u16) * (3 + num)
+ + align - 1) & ~(align - 1))
+ + sizeof (u16) * 3 + sizeof (vring_used_elem_t) * num;
+}
+#endif
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff