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2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01 
 kernel/include/uapi/linux/virtio_net.h
....@@ -57,6 +57,9 @@
5757 					 * Steering */
5858 #define VIRTIO_NET_F_CTRL_MAC_ADDR 23	/* Set MAC address */
5959 
60
+#define VIRTIO_NET_F_HASH_REPORT  57	/* Supports hash report */
61
+#define VIRTIO_NET_F_RSS	  60	/* Supports RSS RX steering */
62
+#define VIRTIO_NET_F_RSC_EXT	  61	/* extended coalescing info */
6063 #define VIRTIO_NET_F_STANDBY	  62	/* Act as standby for another device
6164 					 * with the same MAC.
6265 					 */
....@@ -69,29 +72,46 @@
6972 #define VIRTIO_NET_S_LINK_UP	1	/* Link is up */
7073 #define VIRTIO_NET_S_ANNOUNCE	2	/* Announcement is needed */
7174 
75
+/* supported/enabled hash types */
76
+#define VIRTIO_NET_RSS_HASH_TYPE_IPv4          (1 << 0)
77
+#define VIRTIO_NET_RSS_HASH_TYPE_TCPv4         (1 << 1)
78
+#define VIRTIO_NET_RSS_HASH_TYPE_UDPv4         (1 << 2)
79
+#define VIRTIO_NET_RSS_HASH_TYPE_IPv6          (1 << 3)
80
+#define VIRTIO_NET_RSS_HASH_TYPE_TCPv6         (1 << 4)
81
+#define VIRTIO_NET_RSS_HASH_TYPE_UDPv6         (1 << 5)
82
+#define VIRTIO_NET_RSS_HASH_TYPE_IP_EX         (1 << 6)
83
+#define VIRTIO_NET_RSS_HASH_TYPE_TCP_EX        (1 << 7)
84
+#define VIRTIO_NET_RSS_HASH_TYPE_UDP_EX        (1 << 8)
85
+
7286 struct virtio_net_config {
7387 	/* The config defining mac address (if VIRTIO_NET_F_MAC) */
7488 	__u8 mac[ETH_ALEN];
7589 	/* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */
76
-	__u16 status;
90
+	__virtio16 status;
7791 	/* Maximum number of each of transmit and receive queues;
7892 	 * see VIRTIO_NET_F_MQ and VIRTIO_NET_CTRL_MQ.
7993 	 * Legal values are between 1 and 0x8000
8094 	 */
81
-	__u16 max_virtqueue_pairs;
95
+	__virtio16 max_virtqueue_pairs;
8296 	/* Default maximum transmit unit advice */
83
-	__u16 mtu;
97
+	__virtio16 mtu;
8498 	/*
8599 	 * speed, in units of 1Mb. All values 0 to INT_MAX are legal.
86100 	 * Any other value stands for unknown.
87101 	 */
88
-	__u32 speed;
102
+	__le32 speed;
89103 	/*
90104 	 * 0x00 - half duplex
91105 	 * 0x01 - full duplex
92106 	 * Any other value stands for unknown.
93107 	 */
94108 	__u8 duplex;
109
+	/* maximum size of RSS key */
110
+	__u8 rss_max_key_size;
111
+	/* maximum number of indirection table entries */
112
+	__le16 rss_max_indirection_table_length;
113
+	/* bitmask of supported VIRTIO_NET_RSS_HASH_ types */
114
+	__le32 supported_hash_types;
95115 } __attribute__((packed));
96116 
97117 /*
....@@ -104,6 +124,7 @@
104124 struct virtio_net_hdr_v1 {
105125 #define VIRTIO_NET_HDR_F_NEEDS_CSUM	1	/* Use csum_start, csum_offset */
106126 #define VIRTIO_NET_HDR_F_DATA_VALID	2	/* Csum is valid */
127
+#define VIRTIO_NET_HDR_F_RSC_INFO	4	/* rsc info in csum_ fields */
107128 	__u8 flags;
108129 #define VIRTIO_NET_HDR_GSO_NONE		0	/* Not a GSO frame */
109130 #define VIRTIO_NET_HDR_GSO_TCPV4	1	/* GSO frame, IPv4 TCP (TSO) */
....@@ -113,9 +134,44 @@
113134 	__u8 gso_type;
114135 	__virtio16 hdr_len;	/* Ethernet + IP + tcp/udp hdrs */
115136 	__virtio16 gso_size;	/* Bytes to append to hdr_len per frame */
116
-	__virtio16 csum_start;	/* Position to start checksumming from */
117
-	__virtio16 csum_offset;	/* Offset after that to place checksum */
137
+	union {
138
+		struct {
139
+			__virtio16 csum_start;
140
+			__virtio16 csum_offset;
141
+		};
142
+		/* Checksum calculation */
143
+		struct {
144
+			/* Position to start checksumming from */
145
+			__virtio16 start;
146
+			/* Offset after that to place checksum */
147
+			__virtio16 offset;
148
+		} csum;
149
+		/* Receive Segment Coalescing */
150
+		struct {
151
+			/* Number of coalesced segments */
152
+			__le16 segments;
153
+			/* Number of duplicated acks */
154
+			__le16 dup_acks;
155
+		} rsc;
156
+	};
118157 	__virtio16 num_buffers;	/* Number of merged rx buffers */
158
+};
159
+
160
+struct virtio_net_hdr_v1_hash {
161
+	struct virtio_net_hdr_v1 hdr;
162
+	__le32 hash_value;
163
+#define VIRTIO_NET_HASH_REPORT_NONE            0
164
+#define VIRTIO_NET_HASH_REPORT_IPv4            1
165
+#define VIRTIO_NET_HASH_REPORT_TCPv4           2
166
+#define VIRTIO_NET_HASH_REPORT_UDPv4           3
167
+#define VIRTIO_NET_HASH_REPORT_IPv6            4
168
+#define VIRTIO_NET_HASH_REPORT_TCPv6           5
169
+#define VIRTIO_NET_HASH_REPORT_UDPv6           6
170
+#define VIRTIO_NET_HASH_REPORT_IPv6_EX         7
171
+#define VIRTIO_NET_HASH_REPORT_TCPv6_EX        8
172
+#define VIRTIO_NET_HASH_REPORT_UDPv6_EX        9
173
+	__le16 hash_report;
174
+	__le16 padding;
119175 };
120176 
121177 #ifndef VIRTIO_NET_NO_LEGACY
....@@ -228,7 +284,9 @@
228284 
229285 /*
230286  * Control Receive Flow Steering
231
- *
287
+ */
288
+#define VIRTIO_NET_CTRL_MQ   4
289
+/*
232290  * The command VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET
233291  * enables Receive Flow Steering, specifying the number of the transmit and
234292  * receive queues that will be used. After the command is consumed and acked by
....@@ -241,12 +299,48 @@
241299 	__virtio16 virtqueue_pairs;
242300 };
243301 
244
-#define VIRTIO_NET_CTRL_MQ   4
245302  #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET        0
246303  #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN        1
247304  #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX        0x8000
248305 
249306 /*
307
+ * The command VIRTIO_NET_CTRL_MQ_RSS_CONFIG has the same effect as
308
+ * VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET does and additionally configures
309
+ * the receive steering to use a hash calculated for incoming packet
310
+ * to decide on receive virtqueue to place the packet. The command
311
+ * also provides parameters to calculate a hash and receive virtqueue.
312
+ */
313
+struct virtio_net_rss_config {
314
+	__le32 hash_types;
315
+	__le16 indirection_table_mask;
316
+	__le16 unclassified_queue;
317
+	__le16 indirection_table[1/* + indirection_table_mask */];
318
+	__le16 max_tx_vq;
319
+	__u8 hash_key_length;
320
+	__u8 hash_key_data[/* hash_key_length */];
321
+};
322
+
323
+ #define VIRTIO_NET_CTRL_MQ_RSS_CONFIG          1
324
+
325
+/*
326
+ * The command VIRTIO_NET_CTRL_MQ_HASH_CONFIG requests the device
327
+ * to include in the virtio header of the packet the value of the
328
+ * calculated hash and the report type of hash. It also provides
329
+ * parameters for hash calculation. The command requires feature
330
+ * VIRTIO_NET_F_HASH_REPORT to be negotiated to extend the
331
+ * layout of virtio header as defined in virtio_net_hdr_v1_hash.
332
+ */
333
+struct virtio_net_hash_config {
334
+	__le32 hash_types;
335
+	/* for compatibility with virtio_net_rss_config */
336
+	__le16 reserved[4];
337
+	__u8 hash_key_length;
338
+	__u8 hash_key_data[/* hash_key_length */];
339
+};
340
+
341
+ #define VIRTIO_NET_CTRL_MQ_HASH_CONFIG         2
342
+
343
+/*
250344  * Control network offloads
251345  *
252346  * Reconfigures the network offloads that Guest can handle.