3 * Copyright (c) 2009, Microsoft Corporation.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
16 * Place - Suite 330, Boston, MA 02111-1307 USA.
19 * Haiyang Zhang <haiyangz@microsoft.com>
20 * Hank Janssen <hjanssen@microsoft.com>
28 #include <linux/list.h>
32 #define NVSP_INVALID_PROTOCOL_VERSION ((u32)0xFFFFFFFF)
34 #define NVSP_PROTOCOL_VERSION_1 2
35 #define NVSP_MIN_PROTOCOL_VERSION NVSP_PROTOCOL_VERSION_1
36 #define NVSP_MAX_PROTOCOL_VERSION NVSP_PROTOCOL_VERSION_1
39 NVSP_MSG_TYPE_NONE = 0,
42 NVSP_MSG_TYPE_INIT = 1,
43 NVSP_MSG_TYPE_INIT_COMPLETE = 2,
45 NVSP_VERSION_MSG_START = 100,
47 /* Version 1 Messages */
48 NVSP_MSG1_TYPE_SEND_NDIS_VER = NVSP_VERSION_MSG_START,
50 NVSP_MSG1_TYPE_SEND_RECV_BUF,
51 NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE,
52 NVSP_MSG1_TYPE_REVOKE_RECV_BUF,
54 NVSP_MSG1_TYPE_SEND_SEND_BUF,
55 NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE,
56 NVSP_MSG1_TYPE_REVOKE_SEND_BUF,
58 NVSP_MSG1_TYPE_SEND_RNDIS_PKT,
59 NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE,
62 * This should be set to the number of messages for the version with
63 * the maximum number of messages.
65 NVSP_NUM_MSG_PER_VERSION = 9,
72 NVSP_STAT_PROTOCOL_TOO_NEW,
73 NVSP_STAT_PROTOCOL_TOO_OLD,
74 NVSP_STAT_INVALID_RNDIS_PKT,
79 struct nvsp_message_header {
86 * This message is used by the VSC to initialize the channel after the channels
87 * has been opened. This message should never include anything other then
88 * versioning (i.e. this message will be the same for ever).
90 struct nvsp_message_init {
96 * This message is used by the VSP to complete the initialization of the
97 * channel. This message should never include anything other then versioning
98 * (i.e. this message will be the same for ever).
100 struct nvsp_message_init_complete {
101 u32 negotiated_protocol_ver;
102 u32 max_mdl_chain_len;
106 union nvsp_message_init_uber {
107 struct nvsp_message_init init;
108 struct nvsp_message_init_complete init_complete;
111 /* Version 1 Messages */
114 * This message is used by the VSC to send the NDIS version to the VSP. The VSP
115 * can use this information when handling OIDs sent by the VSC.
117 struct nvsp_1_message_send_ndis_version {
123 * This message is used by the VSC to send a receive buffer to the VSP. The VSP
124 * can then use the receive buffer to send data to the VSC.
126 struct nvsp_1_message_send_receive_buffer {
131 struct nvsp_1_receive_buffer_section {
139 * This message is used by the VSP to acknowledge a receive buffer send by the
140 * VSC. This message must be sent by the VSP before the VSP uses the receive
143 struct nvsp_1_message_send_receive_buffer_complete {
148 * The receive buffer is split into two parts, a large suballocation
149 * section and a small suballocation section. These sections are then
150 * suballocated by a certain size.
154 * For example, the following break up of the receive buffer has 6
155 * large suballocations and 10 small suballocations.
159 * | Large Section | | Small Section |
160 * ------------------------------------------------------------
161 * | | | | | | | | | | | | | | | | | |
163 * LargeOffset SmallOffset
166 struct nvsp_1_receive_buffer_section sections[1];
170 * This message is sent by the VSC to revoke the receive buffer. After the VSP
171 * completes this transaction, the vsp should never use the receive buffer
174 struct nvsp_1_message_revoke_receive_buffer {
179 * This message is used by the VSC to send a send buffer to the VSP. The VSC
180 * can then use the send buffer to send data to the VSP.
182 struct nvsp_1_message_send_send_buffer {
188 * This message is used by the VSP to acknowledge a send buffer sent by the
189 * VSC. This message must be sent by the VSP before the VSP uses the sent
192 struct nvsp_1_message_send_send_buffer_complete {
196 * The VSC gets to choose the size of the send buffer and the VSP gets
197 * to choose the sections size of the buffer. This was done to enable
198 * dynamic reconfigurations when the cost of GPA-direct buffers
205 * This message is sent by the VSC to revoke the send buffer. After the VSP
206 * completes this transaction, the vsp should never use the send buffer again.
208 struct nvsp_1_message_revoke_send_buffer {
213 * This message is used by both the VSP and the VSC to send a RNDIS message to
214 * the opposite channel endpoint.
216 struct nvsp_1_message_send_rndis_packet {
218 * This field is specified by RNIDS. They assume there's two different
219 * channels of communication. However, the Network VSP only has one.
220 * Therefore, the channel travels with the RNDIS packet.
225 * This field is used to send part or all of the data through a send
226 * buffer. This values specifies an index into the send buffer. If the
227 * index is 0xFFFFFFFF, then the send buffer is not being used and all
228 * of the data was sent through other VMBus mechanisms.
230 u32 send_buf_section_index;
231 u32 send_buf_section_size;
235 * This message is used by both the VSP and the VSC to complete a RNDIS message
236 * to the opposite channel endpoint. At this point, the initiator of this
237 * message cannot use any resources associated with the original RNDIS packet.
239 struct nvsp_1_message_send_rndis_packet_complete {
243 union nvsp_1_message_uber {
244 struct nvsp_1_message_send_ndis_version send_ndis_ver;
246 struct nvsp_1_message_send_receive_buffer send_recv_buf;
247 struct nvsp_1_message_send_receive_buffer_complete
248 send_recv_buf_complete;
249 struct nvsp_1_message_revoke_receive_buffer revoke_recv_buf;
251 struct nvsp_1_message_send_send_buffer send_send_buf;
252 struct nvsp_1_message_send_send_buffer_complete send_send_buf_complete;
253 struct nvsp_1_message_revoke_send_buffer revoke_send_buf;
255 struct nvsp_1_message_send_rndis_packet send_rndis_pkt;
256 struct nvsp_1_message_send_rndis_packet_complete
257 send_rndis_pkt_complete;
260 union nvsp_all_messages {
261 union nvsp_message_init_uber init_msg;
262 union nvsp_1_message_uber v1_msg;
266 struct nvsp_message {
267 struct nvsp_message_header hdr;
268 union nvsp_all_messages msg;
274 /* #define NVSC_MIN_PROTOCOL_VERSION 1 */
275 /* #define NVSC_MAX_PROTOCOL_VERSION 1 */
277 #define NETVSC_SEND_BUFFER_SIZE (64*1024) /* 64K */
278 #define NETVSC_SEND_BUFFER_ID 0xface
281 #define NETVSC_RECEIVE_BUFFER_SIZE (1024*1024) /* 1MB */
283 #define NETVSC_RECEIVE_BUFFER_ID 0xcafe
285 #define NETVSC_RECEIVE_SG_COUNT 1
287 /* Preallocated receive packets */
288 #define NETVSC_RECEIVE_PACKETLIST_COUNT 256
290 #define NETVSC_PACKET_SIZE 2048
292 /* Per netvsc channel-specific */
293 struct netvsc_device {
294 struct hv_device *dev;
297 atomic_t num_outstanding_sends;
299 * List of free preallocated hv_netvsc_packet to represent receive
302 struct list_head recv_pkt_list;
303 spinlock_t recv_pkt_list_lock;
305 /* Send buffer allocated by us but manages by NetVSP */
308 u32 send_buf_gpadl_handle;
309 u32 send_section_size;
311 /* Receive buffer allocated by us but manages by NetVSP */
314 u32 recv_buf_gpadl_handle;
315 u32 recv_section_cnt;
316 struct nvsp_1_receive_buffer_section *recv_section;
318 /* Used for NetVSP initialization protocol */
319 struct completion channel_init_wait;
320 struct nvsp_message channel_init_pkt;
322 struct nvsp_message revoke_packet;
323 /* unsigned char HwMacAddr[HW_MACADDR_LEN]; */
325 /* Holds rndis device info */
329 #endif /* _NETVSC_H_ */