1 /* SPDX-License-Identifier: GPL-2.0-only */
4 * Copyright (c) 2011, Microsoft Corporation.
15 #include <linux/list.h>
16 #include <linux/hyperv.h>
17 #include <linux/rndis.h>
20 #define OID_GEN_RECEIVE_SCALE_CAPABILITIES 0x00010203 /* query only */
21 #define OID_GEN_RECEIVE_SCALE_PARAMETERS 0x00010204 /* query and set */
23 #define NDIS_OBJECT_TYPE_RSS_CAPABILITIES 0x88
24 #define NDIS_OBJECT_TYPE_RSS_PARAMETERS 0x89
25 #define NDIS_OBJECT_TYPE_OFFLOAD 0xa7
27 #define NDIS_RECEIVE_SCALE_CAPABILITIES_REVISION_2 2
28 #define NDIS_RECEIVE_SCALE_PARAMETERS_REVISION_2 2
30 struct ndis_obj_header {
36 /* ndis_recv_scale_cap/cap_flag */
37 #define NDIS_RSS_CAPS_MESSAGE_SIGNALED_INTERRUPTS 0x01000000
38 #define NDIS_RSS_CAPS_CLASSIFICATION_AT_ISR 0x02000000
39 #define NDIS_RSS_CAPS_CLASSIFICATION_AT_DPC 0x04000000
40 #define NDIS_RSS_CAPS_USING_MSI_X 0x08000000
41 #define NDIS_RSS_CAPS_RSS_AVAILABLE_ON_PORTS 0x10000000
42 #define NDIS_RSS_CAPS_SUPPORTS_MSI_X 0x20000000
43 #define NDIS_RSS_CAPS_HASH_TYPE_TCP_IPV4 0x00000100
44 #define NDIS_RSS_CAPS_HASH_TYPE_TCP_IPV6 0x00000200
45 #define NDIS_RSS_CAPS_HASH_TYPE_TCP_IPV6_EX 0x00000400
47 struct ndis_recv_scale_cap { /* NDIS_RECEIVE_SCALE_CAPABILITIES */
48 struct ndis_obj_header hdr;
52 u16 num_indirect_tabent;
56 /* ndis_recv_scale_param flags */
57 #define NDIS_RSS_PARAM_FLAG_BASE_CPU_UNCHANGED 0x0001
58 #define NDIS_RSS_PARAM_FLAG_HASH_INFO_UNCHANGED 0x0002
59 #define NDIS_RSS_PARAM_FLAG_ITABLE_UNCHANGED 0x0004
60 #define NDIS_RSS_PARAM_FLAG_HASH_KEY_UNCHANGED 0x0008
61 #define NDIS_RSS_PARAM_FLAG_DISABLE_RSS 0x0010
64 #define NDIS_HASH_FUNC_TOEPLITZ 0x00000001
65 #define NDIS_HASH_IPV4 0x00000100
66 #define NDIS_HASH_TCP_IPV4 0x00000200
67 #define NDIS_HASH_IPV6 0x00000400
68 #define NDIS_HASH_IPV6_EX 0x00000800
69 #define NDIS_HASH_TCP_IPV6 0x00001000
70 #define NDIS_HASH_TCP_IPV6_EX 0x00002000
72 #define NDIS_RSS_INDIRECTION_TABLE_MAX_SIZE_REVISION_2 (128 * 4)
73 #define NDIS_RSS_HASH_SECRET_KEY_MAX_SIZE_REVISION_2 40
77 struct ndis_recv_scale_param { /* NDIS_RECEIVE_SCALE_PARAMETERS */
78 struct ndis_obj_header hdr;
80 /* Qualifies the rest of the information */
83 /* The base CPU number to do receive processing. not used */
86 /* This describes the hash function and type being enabled */
89 /* The size of indirection table array */
92 /* The offset of the indirection table from the beginning of this
95 u32 indirect_taboffset;
97 /* The size of the hash secret key */
100 /* The offset of the secret key from the beginning of this structure */
103 u32 processor_masks_offset;
104 u32 num_processor_masks;
105 u32 processor_masks_entry_size;
108 struct ndis_tcp_ip_checksum_info {
115 u32 ip_header_checksum:1;
117 u32 tcp_header_offset:10;
120 u32 tcp_checksum_failed:1;
121 u32 udp_checksum_failed:1;
122 u32 ip_checksum_failed:1;
123 u32 tcp_checksum_succeeded:1;
124 u32 udp_checksum_succeeded:1;
125 u32 ip_checksum_succeeded:1;
127 u32 tcp_checksum_value_invalid:1;
128 u32 ip_checksum_value_invalid:1;
134 struct ndis_pkt_8021q_info {
137 u32 pri:3; /* User Priority */
138 u32 cfi:1; /* Canonical Format ID */
139 u32 vlanid:12; /* VLAN ID */
147 * Represent netvsc packet which contains 1 RNDIS and 1 ethernet frame
150 * The size of this structure is less than 48 bytes and we can now
151 * place this structure in the skb->cb field.
153 struct hv_netvsc_packet {
154 /* Bookkeeping stuff */
155 u8 cp_partial; /* partial copy into send buffer */
157 u8 rmsg_size; /* RNDIS header and PPI size */
158 u8 rmsg_pgcnt; /* page count of RNDIS header and PPI */
166 u32 total_data_buflen;
169 #define NETVSC_HASH_KEYLEN 40
171 struct netvsc_device_info {
172 unsigned char mac_adr[ETH_ALEN];
176 u32 send_section_size;
177 u32 recv_section_size;
179 struct bpf_prog *bprog;
181 u8 rss_key[NETVSC_HASH_KEYLEN];
184 enum rndis_device_state {
185 RNDIS_DEV_UNINITIALIZED = 0,
186 RNDIS_DEV_INITIALIZING,
187 RNDIS_DEV_INITIALIZED,
188 RNDIS_DEV_DATAINITIALIZED,
191 struct rndis_device {
192 struct net_device *ndev;
194 enum rndis_device_state state;
198 spinlock_t request_lock;
199 struct list_head req_list;
201 struct work_struct mcast_work;
204 bool link_state; /* 0 - link up, 1 - link down */
206 u8 hw_mac_adr[ETH_ALEN];
207 u8 rss_key[NETVSC_HASH_KEYLEN];
212 struct rndis_message;
213 struct ndis_offload_params;
214 struct netvsc_device;
215 struct netvsc_channel;
216 struct net_device_context;
218 extern u32 netvsc_ring_bytes;
220 struct netvsc_device *netvsc_device_add(struct hv_device *device,
221 const struct netvsc_device_info *info);
222 int netvsc_alloc_recv_comp_ring(struct netvsc_device *net_device, u32 q_idx);
223 void netvsc_device_remove(struct hv_device *device);
224 int netvsc_send(struct net_device *net,
225 struct hv_netvsc_packet *packet,
226 struct rndis_message *rndis_msg,
227 struct hv_page_buffer *page_buffer,
230 void netvsc_linkstatus_callback(struct net_device *net,
231 struct rndis_message *resp,
232 void *data, u32 data_buflen);
233 int netvsc_recv_callback(struct net_device *net,
234 struct netvsc_device *nvdev,
235 struct netvsc_channel *nvchan);
236 void netvsc_channel_cb(void *context);
237 int netvsc_poll(struct napi_struct *napi, int budget);
239 u32 netvsc_run_xdp(struct net_device *ndev, struct netvsc_channel *nvchan,
240 struct xdp_buff *xdp);
241 unsigned int netvsc_xdp_fraglen(unsigned int len);
242 struct bpf_prog *netvsc_xdp_get(struct netvsc_device *nvdev);
243 int netvsc_xdp_set(struct net_device *dev, struct bpf_prog *prog,
244 struct netlink_ext_ack *extack,
245 struct netvsc_device *nvdev);
246 int netvsc_vf_setxdp(struct net_device *vf_netdev, struct bpf_prog *prog);
247 int netvsc_bpf(struct net_device *dev, struct netdev_bpf *bpf);
249 int rndis_set_subchannel(struct net_device *ndev,
250 struct netvsc_device *nvdev,
251 struct netvsc_device_info *dev_info);
252 int rndis_filter_open(struct netvsc_device *nvdev);
253 int rndis_filter_close(struct netvsc_device *nvdev);
254 struct netvsc_device *rndis_filter_device_add(struct hv_device *dev,
255 struct netvsc_device_info *info);
256 void rndis_filter_update(struct netvsc_device *nvdev);
257 void rndis_filter_device_remove(struct hv_device *dev,
258 struct netvsc_device *nvdev);
259 int rndis_filter_set_rss_param(struct rndis_device *rdev,
261 int rndis_filter_set_offload_params(struct net_device *ndev,
262 struct netvsc_device *nvdev,
263 struct ndis_offload_params *req_offloads);
264 int rndis_filter_receive(struct net_device *ndev,
265 struct netvsc_device *net_dev,
266 struct netvsc_channel *nvchan,
267 void *data, u32 buflen);
269 int rndis_filter_set_device_mac(struct netvsc_device *ndev,
272 int netvsc_switch_datapath(struct net_device *nv_dev, bool vf);
274 #define NVSP_INVALID_PROTOCOL_VERSION ((u32)0xFFFFFFFF)
276 #define NVSP_PROTOCOL_VERSION_1 2
277 #define NVSP_PROTOCOL_VERSION_2 0x30002
278 #define NVSP_PROTOCOL_VERSION_4 0x40000
279 #define NVSP_PROTOCOL_VERSION_5 0x50000
280 #define NVSP_PROTOCOL_VERSION_6 0x60000
281 #define NVSP_PROTOCOL_VERSION_61 0x60001
284 NVSP_MSG_TYPE_NONE = 0,
287 NVSP_MSG_TYPE_INIT = 1,
288 NVSP_MSG_TYPE_INIT_COMPLETE = 2,
290 NVSP_VERSION_MSG_START = 100,
292 /* Version 1 Messages */
293 NVSP_MSG1_TYPE_SEND_NDIS_VER = NVSP_VERSION_MSG_START,
295 NVSP_MSG1_TYPE_SEND_RECV_BUF,
296 NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE,
297 NVSP_MSG1_TYPE_REVOKE_RECV_BUF,
299 NVSP_MSG1_TYPE_SEND_SEND_BUF,
300 NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE,
301 NVSP_MSG1_TYPE_REVOKE_SEND_BUF,
303 NVSP_MSG1_TYPE_SEND_RNDIS_PKT,
304 NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE,
306 /* Version 2 messages */
307 NVSP_MSG2_TYPE_SEND_CHIMNEY_DELEGATED_BUF,
308 NVSP_MSG2_TYPE_SEND_CHIMNEY_DELEGATED_BUF_COMP,
309 NVSP_MSG2_TYPE_REVOKE_CHIMNEY_DELEGATED_BUF,
311 NVSP_MSG2_TYPE_RESUME_CHIMNEY_RX_INDICATION,
313 NVSP_MSG2_TYPE_TERMINATE_CHIMNEY,
314 NVSP_MSG2_TYPE_TERMINATE_CHIMNEY_COMP,
316 NVSP_MSG2_TYPE_INDICATE_CHIMNEY_EVENT,
318 NVSP_MSG2_TYPE_SEND_CHIMNEY_PKT,
319 NVSP_MSG2_TYPE_SEND_CHIMNEY_PKT_COMP,
321 NVSP_MSG2_TYPE_POST_CHIMNEY_RECV_REQ,
322 NVSP_MSG2_TYPE_POST_CHIMNEY_RECV_REQ_COMP,
324 NVSP_MSG2_TYPE_ALLOC_RXBUF,
325 NVSP_MSG2_TYPE_ALLOC_RXBUF_COMP,
327 NVSP_MSG2_TYPE_FREE_RXBUF,
329 NVSP_MSG2_TYPE_SEND_VMQ_RNDIS_PKT,
330 NVSP_MSG2_TYPE_SEND_VMQ_RNDIS_PKT_COMP,
332 NVSP_MSG2_TYPE_SEND_NDIS_CONFIG,
334 NVSP_MSG2_TYPE_ALLOC_CHIMNEY_HANDLE,
335 NVSP_MSG2_TYPE_ALLOC_CHIMNEY_HANDLE_COMP,
337 NVSP_MSG2_MAX = NVSP_MSG2_TYPE_ALLOC_CHIMNEY_HANDLE_COMP,
339 /* Version 4 messages */
340 NVSP_MSG4_TYPE_SEND_VF_ASSOCIATION,
341 NVSP_MSG4_TYPE_SWITCH_DATA_PATH,
342 NVSP_MSG4_TYPE_UPLINK_CONNECT_STATE_DEPRECATED,
344 NVSP_MSG4_MAX = NVSP_MSG4_TYPE_UPLINK_CONNECT_STATE_DEPRECATED,
346 /* Version 5 messages */
347 NVSP_MSG5_TYPE_OID_QUERY_EX,
348 NVSP_MSG5_TYPE_OID_QUERY_EX_COMP,
349 NVSP_MSG5_TYPE_SUBCHANNEL,
350 NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE,
352 NVSP_MSG5_MAX = NVSP_MSG5_TYPE_SEND_INDIRECTION_TABLE,
354 /* Version 6 messages */
355 NVSP_MSG6_TYPE_PD_API,
356 NVSP_MSG6_TYPE_PD_POST_BATCH,
358 NVSP_MSG6_MAX = NVSP_MSG6_TYPE_PD_POST_BATCH
365 NVSP_STAT_PROTOCOL_TOO_NEW,
366 NVSP_STAT_PROTOCOL_TOO_OLD,
367 NVSP_STAT_INVALID_RNDIS_PKT,
369 NVSP_STAT_PROTOCOL_UNSUPPORTED,
373 struct nvsp_message_header {
380 * This message is used by the VSC to initialize the channel after the channels
381 * has been opened. This message should never include anything other then
382 * versioning (i.e. this message will be the same for ever).
384 struct nvsp_message_init {
385 u32 min_protocol_ver;
386 u32 max_protocol_ver;
390 * This message is used by the VSP to complete the initialization of the
391 * channel. This message should never include anything other then versioning
392 * (i.e. this message will be the same for ever).
394 struct nvsp_message_init_complete {
395 u32 negotiated_protocol_ver;
396 u32 max_mdl_chain_len;
400 union nvsp_message_init_uber {
401 struct nvsp_message_init init;
402 struct nvsp_message_init_complete init_complete;
405 /* Version 1 Messages */
408 * This message is used by the VSC to send the NDIS version to the VSP. The VSP
409 * can use this information when handling OIDs sent by the VSC.
411 struct nvsp_1_message_send_ndis_version {
417 * This message is used by the VSC to send a receive buffer to the VSP. The VSP
418 * can then use the receive buffer to send data to the VSC.
420 struct nvsp_1_message_send_receive_buffer {
425 struct nvsp_1_receive_buffer_section {
433 * This message is used by the VSP to acknowledge a receive buffer send by the
434 * VSC. This message must be sent by the VSP before the VSP uses the receive
437 struct nvsp_1_message_send_receive_buffer_complete {
442 * The receive buffer is split into two parts, a large suballocation
443 * section and a small suballocation section. These sections are then
444 * suballocated by a certain size.
448 * For example, the following break up of the receive buffer has 6
449 * large suballocations and 10 small suballocations.
453 * | Large Section | | Small Section |
454 * ------------------------------------------------------------
455 * | | | | | | | | | | | | | | | | | |
457 * LargeOffset SmallOffset
460 struct nvsp_1_receive_buffer_section sections[1];
464 * This message is sent by the VSC to revoke the receive buffer. After the VSP
465 * completes this transaction, the vsp should never use the receive buffer
468 struct nvsp_1_message_revoke_receive_buffer {
473 * This message is used by the VSC to send a send buffer to the VSP. The VSC
474 * can then use the send buffer to send data to the VSP.
476 struct nvsp_1_message_send_send_buffer {
482 * This message is used by the VSP to acknowledge a send buffer sent by the
483 * VSC. This message must be sent by the VSP before the VSP uses the sent
486 struct nvsp_1_message_send_send_buffer_complete {
490 * The VSC gets to choose the size of the send buffer and the VSP gets
491 * to choose the sections size of the buffer. This was done to enable
492 * dynamic reconfigurations when the cost of GPA-direct buffers
499 * This message is sent by the VSC to revoke the send buffer. After the VSP
500 * completes this transaction, the vsp should never use the send buffer again.
502 struct nvsp_1_message_revoke_send_buffer {
507 * This message is used by both the VSP and the VSC to send a RNDIS message to
508 * the opposite channel endpoint.
510 struct nvsp_1_message_send_rndis_packet {
512 * This field is specified by RNDIS. They assume there's two different
513 * channels of communication. However, the Network VSP only has one.
514 * Therefore, the channel travels with the RNDIS packet.
519 * This field is used to send part or all of the data through a send
520 * buffer. This values specifies an index into the send buffer. If the
521 * index is 0xFFFFFFFF, then the send buffer is not being used and all
522 * of the data was sent through other VMBus mechanisms.
524 u32 send_buf_section_index;
525 u32 send_buf_section_size;
529 * This message is used by both the VSP and the VSC to complete a RNDIS message
530 * to the opposite channel endpoint. At this point, the initiator of this
531 * message cannot use any resources associated with the original RNDIS packet.
533 struct nvsp_1_message_send_rndis_packet_complete {
537 union nvsp_1_message_uber {
538 struct nvsp_1_message_send_ndis_version send_ndis_ver;
540 struct nvsp_1_message_send_receive_buffer send_recv_buf;
541 struct nvsp_1_message_send_receive_buffer_complete
542 send_recv_buf_complete;
543 struct nvsp_1_message_revoke_receive_buffer revoke_recv_buf;
545 struct nvsp_1_message_send_send_buffer send_send_buf;
546 struct nvsp_1_message_send_send_buffer_complete send_send_buf_complete;
547 struct nvsp_1_message_revoke_send_buffer revoke_send_buf;
549 struct nvsp_1_message_send_rndis_packet send_rndis_pkt;
550 struct nvsp_1_message_send_rndis_packet_complete
551 send_rndis_pkt_complete;
556 * Network VSP protocol version 2 messages:
558 struct nvsp_2_vsc_capability {
566 u64 correlation_id:1;
574 struct nvsp_2_send_ndis_config {
577 struct nvsp_2_vsc_capability capability;
580 /* Allocate receive buffer */
581 struct nvsp_2_alloc_rxbuf {
582 /* Allocation ID to match the allocation request and response */
585 /* Length of the VM shared memory receive buffer that needs to
591 /* Allocate receive buffer complete */
592 struct nvsp_2_alloc_rxbuf_comp {
593 /* The NDIS_STATUS code for buffer allocation */
598 /* GPADL handle for the allocated receive buffer */
601 /* Receive buffer ID */
605 struct nvsp_2_free_rxbuf {
609 union nvsp_2_message_uber {
610 struct nvsp_2_send_ndis_config send_ndis_config;
611 struct nvsp_2_alloc_rxbuf alloc_rxbuf;
612 struct nvsp_2_alloc_rxbuf_comp alloc_rxbuf_comp;
613 struct nvsp_2_free_rxbuf free_rxbuf;
616 struct nvsp_4_send_vf_association {
617 /* 1: allocated, serial number is valid. 0: not allocated */
620 /* Serial number of the VF to team with */
624 enum nvsp_vm_datapath {
625 NVSP_DATAPATH_SYNTHETIC = 0,
630 struct nvsp_4_sw_datapath {
631 u32 active_datapath; /* active data path in VM */
634 union nvsp_4_message_uber {
635 struct nvsp_4_send_vf_association vf_assoc;
636 struct nvsp_4_sw_datapath active_dp;
639 enum nvsp_subchannel_operation {
640 NVSP_SUBCHANNEL_NONE = 0,
641 NVSP_SUBCHANNEL_ALLOCATE,
645 struct nvsp_5_subchannel_request {
650 struct nvsp_5_subchannel_complete {
652 u32 num_subchannels; /* Actual number of subchannels allocated */
655 struct nvsp_5_send_indirect_table {
656 /* The number of entries in the send indirection table */
659 /* The offset of the send indirection table from the beginning of
660 * struct nvsp_message.
661 * The send indirection table tells which channel to put the send
662 * traffic on. Each entry is a channel number.
667 union nvsp_5_message_uber {
668 struct nvsp_5_subchannel_request subchn_req;
669 struct nvsp_5_subchannel_complete subchn_comp;
670 struct nvsp_5_send_indirect_table send_table;
673 enum nvsp_6_pd_api_op {
674 PD_API_OP_CONFIG = 1,
675 PD_API_OP_SW_DATAPATH, /* Switch Datapath */
676 PD_API_OP_OPEN_PROVIDER,
677 PD_API_OP_CLOSE_PROVIDER,
678 PD_API_OP_CREATE_QUEUE,
679 PD_API_OP_FLUSH_QUEUE,
680 PD_API_OP_FREE_QUEUE,
681 PD_API_OP_ALLOC_COM_BUF, /* Allocate Common Buffer */
682 PD_API_OP_FREE_COM_BUF, /* Free Common Buffer */
686 struct grp_affinity {
692 struct nvsp_6_pd_api_req {
696 /* MMIO information is sent from the VM to VSP */
698 u64 mmio_pa; /* MMIO Physical Address */
701 /* Number of PD queues a VM can support */
705 /* Switch Datapath */
707 /* Host Datapath Is PacketDirect */
710 /* Guest PacketDirect Is Enabled */
716 u32 prov_id; /* Provider id */
733 struct grp_affinity affy;
748 /* Allocate Common Buffer */
751 u32 pf_node; /* Preferred Node */
755 /* Free Common Buffer */
758 u64 pa; /* Physical Address */
759 u32 pf_node; /* Preferred Node */
766 struct nvsp_6_pd_api_comp {
772 /* actual number of PD queues allocated to the VM */
775 /* Num Receive Rss PD Queues */
778 u8 is_supported; /* Is supported by VSP */
779 u8 is_enabled; /* Is enabled by VSP */
793 struct grp_affinity affy;
796 /* Allocate Common Buffer */
798 u64 pa; /* Physical Address */
800 u32 pf_node; /* Preferred Node */
807 struct nvsp_6_pd_buf {
814 struct nvsp_6_pd_batch_msg {
815 struct nvsp_message_header hdr;
820 struct nvsp_6_pd_buf pd_buf[0];
823 union nvsp_6_message_uber {
824 struct nvsp_6_pd_api_req pd_req;
825 struct nvsp_6_pd_api_comp pd_comp;
828 union nvsp_all_messages {
829 union nvsp_message_init_uber init_msg;
830 union nvsp_1_message_uber v1_msg;
831 union nvsp_2_message_uber v2_msg;
832 union nvsp_4_message_uber v4_msg;
833 union nvsp_5_message_uber v5_msg;
834 union nvsp_6_message_uber v6_msg;
838 struct nvsp_message {
839 struct nvsp_message_header hdr;
840 union nvsp_all_messages msg;
844 #define NETVSC_MTU 65535
845 #define NETVSC_MTU_MIN ETH_MIN_MTU
847 /* Max buffer sizes allowed by a host */
848 #define NETVSC_RECEIVE_BUFFER_SIZE (1024 * 1024 * 31) /* 31MB */
849 #define NETVSC_RECEIVE_BUFFER_SIZE_LEGACY (1024 * 1024 * 15) /* 15MB */
850 #define NETVSC_RECEIVE_BUFFER_DEFAULT (1024 * 1024 * 16)
852 #define NETVSC_SEND_BUFFER_SIZE (1024 * 1024 * 15) /* 15MB */
853 #define NETVSC_SEND_BUFFER_DEFAULT (1024 * 1024)
855 #define NETVSC_INVALID_INDEX -1
857 #define NETVSC_SEND_SECTION_SIZE 6144
858 #define NETVSC_RECV_SECTION_SIZE 1728
860 /* Default size of TX buf: 1MB, RX buf: 16MB */
861 #define NETVSC_MIN_TX_SECTIONS 10
862 #define NETVSC_DEFAULT_TX (NETVSC_SEND_BUFFER_DEFAULT \
863 / NETVSC_SEND_SECTION_SIZE)
864 #define NETVSC_MIN_RX_SECTIONS 10
865 #define NETVSC_DEFAULT_RX (NETVSC_RECEIVE_BUFFER_DEFAULT \
866 / NETVSC_RECV_SECTION_SIZE)
868 #define NETVSC_RECEIVE_BUFFER_ID 0xcafe
869 #define NETVSC_SEND_BUFFER_ID 0
871 #define NETVSC_SUPPORTED_HW_FEATURES (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | \
872 NETIF_F_TSO | NETIF_F_IPV6_CSUM | \
873 NETIF_F_TSO6 | NETIF_F_LRO | \
874 NETIF_F_SG | NETIF_F_RXHASH)
876 #define VRSS_SEND_TAB_SIZE 16 /* must be power of 2 */
877 #define VRSS_CHANNEL_MAX 64
878 #define VRSS_CHANNEL_DEFAULT 8
880 #define RNDIS_MAX_PKT_DEFAULT 8
881 #define RNDIS_PKT_ALIGN_DEFAULT 8
883 #define NETVSC_XDP_HDRM 256
885 #define NETVSC_MIN_OUT_MSG_SIZE (sizeof(struct vmpacket_descriptor) + \
886 sizeof(struct nvsp_message))
887 #define NETVSC_MIN_IN_MSG_SIZE sizeof(struct vmpacket_descriptor)
889 /* Estimated requestor size:
890 * out_ring_size/min_out_msg_size + in_ring_size/min_in_msg_size
892 static inline u32 netvsc_rqstor_size(unsigned long ringbytes)
894 return ringbytes / NETVSC_MIN_OUT_MSG_SIZE +
895 ringbytes / NETVSC_MIN_IN_MSG_SIZE;
898 /* XFER PAGE packets can specify a maximum of 375 ranges for NDIS >= 6.0
899 * and a maximum of 64 ranges for NDIS < 6.0 with no RSC; with RSC, this
900 * limit is raised to 562 (= NVSP_RSC_MAX).
902 #define NETVSC_MAX_XFER_PAGE_RANGES NVSP_RSC_MAX
903 #define NETVSC_XFER_HEADER_SIZE(rng_cnt) \
904 (offsetof(struct vmtransfer_page_packet_header, ranges) + \
905 (rng_cnt) * sizeof(struct vmtransfer_page_range))
906 #define NETVSC_MAX_PKT_SIZE (NETVSC_XFER_HEADER_SIZE(NETVSC_MAX_XFER_PAGE_RANGES) + \
907 sizeof(struct nvsp_message) + (sizeof(u32) * VRSS_SEND_TAB_SIZE))
909 struct multi_send_data {
910 struct sk_buff *skb; /* skb containing the pkt */
911 struct hv_netvsc_packet *pkt; /* netvsc pkt pending */
912 u32 count; /* counter of batched packets */
915 struct recv_comp_data {
916 u64 tid; /* transaction id */
920 struct multi_recv_comp {
921 struct recv_comp_data *slots;
922 u32 first; /* first data entry */
923 u32 next; /* next entry for writing */
926 #define NVSP_RSC_MAX 562 /* Max #RSC frags in a vmbus xfer page pkt */
929 struct ndis_pkt_8021q_info vlan;
930 struct ndis_tcp_ip_checksum_info csum_info;
932 u8 ppi_flags; /* valid/present bits for the above PPIs */
933 u8 is_last; /* last RNDIS msg in a vmtransfer_page */
934 u32 cnt; /* #fragments in an RSC packet */
935 u32 pktlen; /* Full packet length */
936 void *data[NVSP_RSC_MAX];
937 u32 len[NVSP_RSC_MAX];
940 #define NVSC_RSC_VLAN BIT(0) /* valid/present bit for 'vlan' */
941 #define NVSC_RSC_CSUM_INFO BIT(1) /* valid/present bit for 'csum_info' */
942 #define NVSC_RSC_HASH_INFO BIT(2) /* valid/present bit for 'hash_info' */
944 struct netvsc_stats {
950 struct u64_stats_sync syncp;
953 struct netvsc_ethtool_stats {
954 unsigned long tx_scattered;
955 unsigned long tx_no_memory;
956 unsigned long tx_no_space;
957 unsigned long tx_too_big;
958 unsigned long tx_busy;
959 unsigned long tx_send_full;
960 unsigned long rx_comp_busy;
961 unsigned long rx_no_memory;
962 unsigned long stop_queue;
963 unsigned long wake_queue;
964 unsigned long vlan_error;
967 struct netvsc_ethtool_pcpu_stats {
978 struct netvsc_vf_pcpu_stats {
983 struct u64_stats_sync syncp;
987 struct netvsc_reconfig {
988 struct list_head list;
992 /* L4 hash bits for different protocols */
993 #define HV_TCP4_L4HASH 1
994 #define HV_TCP6_L4HASH 2
995 #define HV_UDP4_L4HASH 4
996 #define HV_UDP6_L4HASH 8
997 #define HV_DEFAULT_L4HASH (HV_TCP4_L4HASH | HV_TCP6_L4HASH | HV_UDP4_L4HASH | \
1000 /* The context of the netvsc device */
1001 struct net_device_context {
1002 /* point back to our device context */
1003 struct hv_device *device_ctx;
1005 struct netvsc_device __rcu *nvdev;
1006 /* list of netvsc net_devices */
1007 struct list_head list;
1008 /* reconfigure work */
1009 struct delayed_work dwork;
1010 /* last reconfig time */
1011 unsigned long last_reconfig;
1012 /* reconfig events */
1013 struct list_head reconfig_events;
1014 /* list protection */
1017 u32 msg_enable; /* debug level */
1019 u32 tx_checksum_mask;
1021 u32 tx_table[VRSS_SEND_TAB_SIZE];
1023 u16 rx_table[ITAB_NUM];
1025 /* Ethtool settings */
1028 u32 l4_hash; /* L4 hash settings */
1029 struct netvsc_ethtool_stats eth_stats;
1031 /* State to manage the associated VF interface. */
1032 struct net_device __rcu *vf_netdev;
1033 struct netvsc_vf_pcpu_stats __percpu *vf_stats;
1034 struct delayed_work vf_takeover;
1036 /* 1: allocated, serial number is valid. 0: not allocated */
1038 /* Serial number of the VF to team with */
1041 /* Is the current data path through the VF NIC? */
1042 bool data_path_is_vf;
1044 /* Used to temporarily save the config info across hibernation */
1045 struct netvsc_device_info *saved_netvsc_dev_info;
1048 /* Per channel data */
1049 struct netvsc_channel {
1050 struct vmbus_channel *channel;
1051 struct netvsc_device *net_device;
1052 void *recv_buf; /* buffer to copy packets out from the receive buffer */
1053 const struct vmpacket_descriptor *desc;
1054 struct napi_struct napi;
1055 struct multi_send_data msd;
1056 struct multi_recv_comp mrc;
1057 atomic_t queue_sends;
1058 struct nvsc_rsc rsc;
1060 struct bpf_prog __rcu *bpf_prog;
1061 struct xdp_rxq_info xdp_rxq;
1063 struct netvsc_stats tx_stats;
1064 struct netvsc_stats rx_stats;
1067 /* Per netvsc device */
1068 struct netvsc_device {
1071 wait_queue_head_t wait_drain;
1073 bool tx_disable; /* if true, do not wake up queue again */
1075 /* Receive buffer allocated by us but manages by NetVSP */
1077 u32 recv_buf_size; /* allocated bytes */
1078 u32 recv_buf_gpadl_handle;
1079 u32 recv_section_cnt;
1080 u32 recv_section_size;
1081 u32 recv_completion_cnt;
1083 /* Send buffer allocated by us */
1085 u32 send_buf_gpadl_handle;
1086 u32 send_section_cnt;
1087 u32 send_section_size;
1088 unsigned long *send_section_map;
1090 /* Used for NetVSP initialization protocol */
1091 struct completion channel_init_wait;
1092 struct nvsp_message channel_init_pkt;
1094 struct nvsp_message revoke_packet;
1100 struct work_struct subchan_work;
1101 wait_queue_head_t subchan_open;
1103 struct rndis_device *extension;
1105 u32 max_pkt; /* max number of pkt in one send, e.g. 8 */
1106 u32 pkt_align; /* alignment bytes, e.g. 8 */
1108 struct netvsc_channel chan_table[VRSS_CHANNEL_MAX];
1110 struct rcu_head rcu;
1113 /* NdisInitialize message */
1114 struct rndis_initialize_request {
1121 /* Response to NdisInitialize */
1122 struct rndis_initialize_complete {
1129 u32 max_pkt_per_msg;
1131 u32 pkt_alignment_factor;
1136 /* Call manager devices only: Information about an address family */
1137 /* supported by the device is appended to the response to NdisInitialize. */
1138 struct rndis_co_address_family {
1144 /* NdisHalt message */
1145 struct rndis_halt_request {
1149 /* NdisQueryRequest message */
1150 struct rndis_query_request {
1154 u32 info_buf_offset;
1158 /* Response to NdisQueryRequest */
1159 struct rndis_query_complete {
1163 u32 info_buf_offset;
1166 /* NdisSetRequest message */
1167 struct rndis_set_request {
1171 u32 info_buf_offset;
1176 /* Response to NdisSetRequest */
1177 struct rndis_set_complete {
1182 /* NdisReset message */
1183 struct rndis_reset_request {
1187 /* Response to NdisReset */
1188 struct rndis_reset_complete {
1190 u32 addressing_reset;
1193 /* NdisMIndicateStatus message */
1194 struct rndis_indicate_status {
1197 u32 status_buf_offset;
1200 /* Diagnostic information passed as the status buffer in */
1201 /* struct rndis_indicate_status messages signifying error conditions. */
1202 struct rndis_diagnostic_info {
1207 /* NdisKeepAlive message */
1208 struct rndis_keepalive_request {
1212 /* Response to NdisKeepAlive */
1213 struct rndis_keepalive_complete {
1219 * Data message. All Offset fields contain byte offsets from the beginning of
1220 * struct rndis_packet. All Length fields are in bytes. VcHandle is set
1221 * to 0 for connectionless data, otherwise it contains the VC handle.
1223 struct rndis_packet {
1226 u32 oob_data_offset;
1228 u32 num_oob_data_elements;
1229 u32 per_pkt_info_offset;
1230 u32 per_pkt_info_len;
1235 /* Optional Out of Band data associated with a Data message. */
1239 u32 class_info_offset;
1242 /* Packet extension field contents associated with a Data message. */
1243 struct rndis_per_packet_info {
1250 enum ndis_per_pkt_info_type {
1251 TCPIP_CHKSUM_PKTINFO,
1253 TCP_LARGESEND_PKTINFO,
1254 CLASSIFICATION_HANDLE_PKTINFO,
1260 NBL_HASH_VALUE = PACKET_CANCEL_ID,
1261 ORIGINAL_NET_BUFLIST,
1267 enum rndis_per_pkt_info_interal_type {
1268 RNDIS_PKTINFO_ID = 1,
1269 /* Add more members here */
1274 #define RNDIS_PKTINFO_SUBALLOC BIT(0)
1275 #define RNDIS_PKTINFO_1ST_FRAG BIT(1)
1276 #define RNDIS_PKTINFO_LAST_FRAG BIT(2)
1278 #define RNDIS_PKTINFO_ID_V1 1
1280 struct rndis_pktinfo_id {
1286 struct ndis_object_header {
1292 #define NDIS_OBJECT_TYPE_DEFAULT 0x80
1293 #define NDIS_OFFLOAD_PARAMETERS_REVISION_3 3
1294 #define NDIS_OFFLOAD_PARAMETERS_REVISION_2 2
1295 #define NDIS_OFFLOAD_PARAMETERS_REVISION_1 1
1297 #define NDIS_OFFLOAD_PARAMETERS_NO_CHANGE 0
1298 #define NDIS_OFFLOAD_PARAMETERS_LSOV2_DISABLED 1
1299 #define NDIS_OFFLOAD_PARAMETERS_LSOV2_ENABLED 2
1300 #define NDIS_OFFLOAD_PARAMETERS_LSOV1_ENABLED 2
1301 #define NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED 1
1302 #define NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED 2
1303 #define NDIS_OFFLOAD_PARAMETERS_TX_RX_DISABLED 1
1304 #define NDIS_OFFLOAD_PARAMETERS_TX_ENABLED_RX_DISABLED 2
1305 #define NDIS_OFFLOAD_PARAMETERS_RX_ENABLED_TX_DISABLED 3
1306 #define NDIS_OFFLOAD_PARAMETERS_TX_RX_ENABLED 4
1308 #define NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE 1
1309 #define NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4 0
1310 #define NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6 1
1312 #define VERSION_4_OFFLOAD_SIZE 22
1314 * New offload OIDs for NDIS 6
1316 #define OID_TCP_OFFLOAD_CURRENT_CONFIG 0xFC01020B /* query only */
1317 #define OID_TCP_OFFLOAD_PARAMETERS 0xFC01020C /* set only */
1318 #define OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES 0xFC01020D/* query only */
1319 #define OID_TCP_CONNECTION_OFFLOAD_CURRENT_CONFIG 0xFC01020E /* query only */
1320 #define OID_TCP_CONNECTION_OFFLOAD_HARDWARE_CAPABILITIES 0xFC01020F /* query */
1321 #define OID_OFFLOAD_ENCAPSULATION 0x0101010A /* set/query */
1324 * OID_TCP_OFFLOAD_HARDWARE_CAPABILITIES
1325 * ndis_type: NDIS_OBJTYPE_OFFLOAD
1328 #define NDIS_OFFLOAD_ENCAP_NONE 0x0000
1329 #define NDIS_OFFLOAD_ENCAP_NULL 0x0001
1330 #define NDIS_OFFLOAD_ENCAP_8023 0x0002
1331 #define NDIS_OFFLOAD_ENCAP_8023PQ 0x0004
1332 #define NDIS_OFFLOAD_ENCAP_8023PQ_OOB 0x0008
1333 #define NDIS_OFFLOAD_ENCAP_RFC1483 0x0010
1335 struct ndis_csum_offload {
1338 #define NDIS_TXCSUM_CAP_IP4OPT 0x001
1339 #define NDIS_TXCSUM_CAP_TCP4OPT 0x004
1340 #define NDIS_TXCSUM_CAP_TCP4 0x010
1341 #define NDIS_TXCSUM_CAP_UDP4 0x040
1342 #define NDIS_TXCSUM_CAP_IP4 0x100
1344 #define NDIS_TXCSUM_ALL_TCP4 (NDIS_TXCSUM_CAP_TCP4 | NDIS_TXCSUM_CAP_TCP4OPT)
1348 #define NDIS_RXCSUM_CAP_IP4OPT 0x001
1349 #define NDIS_RXCSUM_CAP_TCP4OPT 0x004
1350 #define NDIS_RXCSUM_CAP_TCP4 0x010
1351 #define NDIS_RXCSUM_CAP_UDP4 0x040
1352 #define NDIS_RXCSUM_CAP_IP4 0x100
1355 #define NDIS_TXCSUM_CAP_IP6EXT 0x001
1356 #define NDIS_TXCSUM_CAP_TCP6OPT 0x004
1357 #define NDIS_TXCSUM_CAP_TCP6 0x010
1358 #define NDIS_TXCSUM_CAP_UDP6 0x040
1361 #define NDIS_RXCSUM_CAP_IP6EXT 0x001
1362 #define NDIS_RXCSUM_CAP_TCP6OPT 0x004
1363 #define NDIS_RXCSUM_CAP_TCP6 0x010
1364 #define NDIS_RXCSUM_CAP_UDP6 0x040
1366 #define NDIS_TXCSUM_ALL_TCP6 (NDIS_TXCSUM_CAP_TCP6 | \
1367 NDIS_TXCSUM_CAP_TCP6OPT | \
1368 NDIS_TXCSUM_CAP_IP6EXT)
1371 struct ndis_lsov1_offload {
1378 struct ndis_ipsecv1_offload {
1388 struct ndis_lsov2_offload {
1396 #define NDIS_LSOV2_CAP_IP6EXT 0x001
1397 #define NDIS_LSOV2_CAP_TCP6OPT 0x004
1399 #define NDIS_LSOV2_CAP_IP6 (NDIS_LSOV2_CAP_IP6EXT | \
1400 NDIS_LSOV2_CAP_TCP6OPT)
1403 struct ndis_ipsecv2_offload {
1422 struct ndis_rsc_offload {
1427 struct ndis_encap_offload {
1432 struct ndis_offload {
1433 struct ndis_object_header header;
1434 struct ndis_csum_offload csum;
1435 struct ndis_lsov1_offload lsov1;
1436 struct ndis_ipsecv1_offload ipsecv1;
1437 struct ndis_lsov2_offload lsov2;
1440 struct ndis_ipsecv2_offload ipsecv2;
1442 struct ndis_rsc_offload rsc;
1443 struct ndis_encap_offload encap_gre;
1446 #define NDIS_OFFLOAD_SIZE sizeof(struct ndis_offload)
1447 #define NDIS_OFFLOAD_SIZE_6_0 offsetof(struct ndis_offload, ipsecv2)
1448 #define NDIS_OFFLOAD_SIZE_6_1 offsetof(struct ndis_offload, rsc)
1450 struct ndis_offload_params {
1451 struct ndis_object_header header;
1461 u8 tcp_connection_ip_v4;
1462 u8 tcp_connection_ip_v6;
1471 u8 encapsulated_packet_task_offload;
1472 u8 encapsulation_types;
1476 struct ndis_tcp_lso_info {
1485 u32 tcp_header_offset:10;
1493 } lso_v1_transmit_complete;
1496 u32 tcp_header_offset:10;
1504 } lso_v2_transmit_complete;
1509 #define NDIS_VLAN_PPI_SIZE (sizeof(struct rndis_per_packet_info) + \
1510 sizeof(struct ndis_pkt_8021q_info))
1512 #define NDIS_CSUM_PPI_SIZE (sizeof(struct rndis_per_packet_info) + \
1513 sizeof(struct ndis_tcp_ip_checksum_info))
1515 #define NDIS_LSO_PPI_SIZE (sizeof(struct rndis_per_packet_info) + \
1516 sizeof(struct ndis_tcp_lso_info))
1518 #define NDIS_HASH_PPI_SIZE (sizeof(struct rndis_per_packet_info) + \
1521 /* Total size of all PPI data */
1522 #define NDIS_ALL_PPI_SIZE (NDIS_VLAN_PPI_SIZE + NDIS_CSUM_PPI_SIZE + \
1523 NDIS_LSO_PPI_SIZE + NDIS_HASH_PPI_SIZE)
1525 /* Format of Information buffer passed in a SetRequest for the OID */
1526 /* OID_GEN_RNDIS_CONFIG_PARAMETER. */
1527 struct rndis_config_parameter_info {
1528 u32 parameter_name_offset;
1529 u32 parameter_name_length;
1531 u32 parameter_value_offset;
1532 u32 parameter_value_length;
1535 /* Values for ParameterType in struct rndis_config_parameter_info */
1536 #define RNDIS_CONFIG_PARAM_TYPE_INTEGER 0
1537 #define RNDIS_CONFIG_PARAM_TYPE_STRING 2
1539 /* CONDIS Miniport messages for connection oriented devices */
1540 /* that do not implement a call manager. */
1542 /* CoNdisMiniportCreateVc message */
1543 struct rcondis_mp_create_vc {
1548 /* Response to CoNdisMiniportCreateVc */
1549 struct rcondis_mp_create_vc_complete {
1555 /* CoNdisMiniportDeleteVc message */
1556 struct rcondis_mp_delete_vc {
1561 /* Response to CoNdisMiniportDeleteVc */
1562 struct rcondis_mp_delete_vc_complete {
1567 /* CoNdisMiniportQueryRequest message */
1568 struct rcondis_mp_query_request {
1574 u32 info_buf_offset;
1577 /* CoNdisMiniportSetRequest message */
1578 struct rcondis_mp_set_request {
1584 u32 info_buf_offset;
1587 /* CoNdisIndicateStatus message */
1588 struct rcondis_indicate_status {
1592 u32 status_buf_offset;
1595 /* CONDIS Call/VC parameters */
1596 struct rcondis_specific_parameters {
1598 u32 parameter_length;
1599 u32 parameter_lffset;
1602 struct rcondis_media_parameters {
1606 struct rcondis_specific_parameters media_specific;
1609 struct rndis_flowspec {
1611 u32 token_bucket_size;
1614 u32 delay_variation;
1617 u32 minimum_policed_size;
1620 struct rcondis_call_manager_parameters {
1621 struct rndis_flowspec transmit;
1622 struct rndis_flowspec receive;
1623 struct rcondis_specific_parameters call_mgr_specific;
1626 /* CoNdisMiniportActivateVc message */
1627 struct rcondis_mp_activate_vc_request {
1631 u32 media_params_offset;
1632 u32 media_params_length;
1633 u32 call_mgr_params_offset;
1634 u32 call_mgr_params_length;
1637 /* Response to CoNdisMiniportActivateVc */
1638 struct rcondis_mp_activate_vc_complete {
1643 /* CoNdisMiniportDeactivateVc message */
1644 struct rcondis_mp_deactivate_vc_request {
1650 /* Response to CoNdisMiniportDeactivateVc */
1651 struct rcondis_mp_deactivate_vc_complete {
1657 /* union with all of the RNDIS messages */
1658 union rndis_message_container {
1659 struct rndis_packet pkt;
1660 struct rndis_initialize_request init_req;
1661 struct rndis_halt_request halt_req;
1662 struct rndis_query_request query_req;
1663 struct rndis_set_request set_req;
1664 struct rndis_reset_request reset_req;
1665 struct rndis_keepalive_request keep_alive_req;
1666 struct rndis_indicate_status indicate_status;
1667 struct rndis_initialize_complete init_complete;
1668 struct rndis_query_complete query_complete;
1669 struct rndis_set_complete set_complete;
1670 struct rndis_reset_complete reset_complete;
1671 struct rndis_keepalive_complete keep_alive_complete;
1672 struct rcondis_mp_create_vc co_miniport_create_vc;
1673 struct rcondis_mp_delete_vc co_miniport_delete_vc;
1674 struct rcondis_indicate_status co_indicate_status;
1675 struct rcondis_mp_activate_vc_request co_miniport_activate_vc;
1676 struct rcondis_mp_deactivate_vc_request co_miniport_deactivate_vc;
1677 struct rcondis_mp_create_vc_complete co_miniport_create_vc_complete;
1678 struct rcondis_mp_delete_vc_complete co_miniport_delete_vc_complete;
1679 struct rcondis_mp_activate_vc_complete co_miniport_activate_vc_complete;
1680 struct rcondis_mp_deactivate_vc_complete
1681 co_miniport_deactivate_vc_complete;
1684 /* Remote NDIS message format */
1685 struct rndis_message {
1688 /* Total length of this message, from the beginning */
1689 /* of the struct rndis_message, in bytes. */
1692 /* Actual message */
1693 union rndis_message_container msg;
1699 /* get the size of an RNDIS message. Pass in the message type, */
1700 /* struct rndis_set_request, struct rndis_packet for example */
1701 #define RNDIS_MESSAGE_SIZE(msg) \
1702 (sizeof(msg) + (sizeof(struct rndis_message) - \
1703 sizeof(union rndis_message_container)))
1705 #define RNDIS_HEADER_SIZE (sizeof(struct rndis_message) - \
1706 sizeof(union rndis_message_container))
1708 #define RNDIS_AND_PPI_SIZE (sizeof(struct rndis_message) + NDIS_ALL_PPI_SIZE)
1710 #define NDIS_PACKET_TYPE_DIRECTED 0x00000001
1711 #define NDIS_PACKET_TYPE_MULTICAST 0x00000002
1712 #define NDIS_PACKET_TYPE_ALL_MULTICAST 0x00000004
1713 #define NDIS_PACKET_TYPE_BROADCAST 0x00000008
1714 #define NDIS_PACKET_TYPE_SOURCE_ROUTING 0x00000010
1715 #define NDIS_PACKET_TYPE_PROMISCUOUS 0x00000020
1716 #define NDIS_PACKET_TYPE_SMT 0x00000040
1717 #define NDIS_PACKET_TYPE_ALL_LOCAL 0x00000080
1718 #define NDIS_PACKET_TYPE_GROUP 0x00000100
1719 #define NDIS_PACKET_TYPE_ALL_FUNCTIONAL 0x00000200
1720 #define NDIS_PACKET_TYPE_FUNCTIONAL 0x00000400
1721 #define NDIS_PACKET_TYPE_MAC_FRAME 0x00000800
1723 #define TRANSPORT_INFO_NOT_IP 0
1724 #define TRANSPORT_INFO_IPV4_TCP 0x01
1725 #define TRANSPORT_INFO_IPV4_UDP 0x02
1726 #define TRANSPORT_INFO_IPV6_TCP 0x10
1727 #define TRANSPORT_INFO_IPV6_UDP 0x20
1729 #define RETRY_US_LO 5000
1730 #define RETRY_US_HI 10000
1731 #define RETRY_MAX 2000 /* >10 sec */
1733 #endif /* _HYPERV_NET_H */