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fceaf24a | 1 | /* |
fceaf24a HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
15 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
16 | * | |
17 | * Authors: | |
18 | * Haiyang Zhang <haiyangz@microsoft.com> | |
19 | * Hank Janssen <hjanssen@microsoft.com> | |
fceaf24a | 20 | */ |
5654e932 | 21 | #include <linux/kernel.h> |
0c3b7b2f S |
22 | #include <linux/sched.h> |
23 | #include <linux/wait.h> | |
45da89e5 | 24 | #include <linux/highmem.h> |
5a0e3ad6 | 25 | #include <linux/slab.h> |
0120ee0d | 26 | #include <linux/io.h> |
9f8bd8ba | 27 | #include <linux/if_ether.h> |
eb335bc4 | 28 | #include <linux/netdevice.h> |
3f335ea2 | 29 | |
5ca7252a | 30 | #include "hyperv_net.h" |
fceaf24a | 31 | |
fceaf24a | 32 | |
e681b954 | 33 | struct rndis_request { |
c2a4efdd | 34 | struct list_head list_ent; |
98d79690 | 35 | struct completion wait_event; |
fceaf24a | 36 | |
0120ee0d GKH |
37 | /* |
38 | * FIXME: We assumed a fixed size response here. If we do ever need to | |
39 | * handle a bigger response, we can either define a max response | |
40 | * message or add a response buffer variable above this field | |
41 | */ | |
c2a4efdd | 42 | struct rndis_message response_msg; |
fceaf24a | 43 | |
454f18a9 | 44 | /* Simplify allocation by having a netvsc packet inline */ |
c2a4efdd HZ |
45 | struct hv_netvsc_packet pkt; |
46 | struct hv_page_buffer buf; | |
454f18a9 | 47 | /* FIXME: We assumed a fixed size request here. */ |
c2a4efdd | 48 | struct rndis_message request_msg; |
e681b954 | 49 | }; |
fceaf24a | 50 | |
9c26aa0d | 51 | static void rndis_filter_send_completion(void *ctx); |
0120ee0d | 52 | |
9c26aa0d | 53 | static void rndis_filter_send_request_completion(void *ctx); |
454f18a9 BP |
54 | |
55 | ||
fceaf24a | 56 | |
9c26aa0d | 57 | static struct rndis_device *get_rndis_device(void) |
fceaf24a | 58 | { |
e681b954 | 59 | struct rndis_device *device; |
fceaf24a | 60 | |
e681b954 | 61 | device = kzalloc(sizeof(struct rndis_device), GFP_KERNEL); |
fceaf24a | 62 | if (!device) |
fceaf24a | 63 | return NULL; |
fceaf24a | 64 | |
880fb89c | 65 | spin_lock_init(&device->request_lock); |
fceaf24a | 66 | |
c2a4efdd | 67 | INIT_LIST_HEAD(&device->req_list); |
fceaf24a | 68 | |
c2a4efdd | 69 | device->state = RNDIS_DEV_UNINITIALIZED; |
fceaf24a HJ |
70 | |
71 | return device; | |
72 | } | |
73 | ||
9c26aa0d | 74 | static struct rndis_request *get_rndis_request(struct rndis_device *dev, |
c2a4efdd HZ |
75 | u32 msg_type, |
76 | u32 msg_len) | |
fceaf24a | 77 | { |
e681b954 | 78 | struct rndis_request *request; |
c2a4efdd | 79 | struct rndis_message *rndis_msg; |
9f33d054 | 80 | struct rndis_set_request *set; |
880fb89c | 81 | unsigned long flags; |
fceaf24a | 82 | |
e681b954 | 83 | request = kzalloc(sizeof(struct rndis_request), GFP_KERNEL); |
fceaf24a | 84 | if (!request) |
fceaf24a | 85 | return NULL; |
fceaf24a | 86 | |
98d79690 | 87 | init_completion(&request->wait_event); |
fceaf24a | 88 | |
c2a4efdd | 89 | rndis_msg = &request->request_msg; |
a388eb17 HZ |
90 | rndis_msg->ndis_msg_type = msg_type; |
91 | rndis_msg->msg_len = msg_len; | |
fceaf24a | 92 | |
0120ee0d GKH |
93 | /* |
94 | * Set the request id. This field is always after the rndis header for | |
95 | * request/response packet types so we just used the SetRequest as a | |
96 | * template | |
97 | */ | |
a388eb17 HZ |
98 | set = &rndis_msg->msg.set_req; |
99 | set->req_id = atomic_inc_return(&dev->new_req_id); | |
fceaf24a | 100 | |
454f18a9 | 101 | /* Add to the request list */ |
c2a4efdd HZ |
102 | spin_lock_irqsave(&dev->request_lock, flags); |
103 | list_add_tail(&request->list_ent, &dev->req_list); | |
104 | spin_unlock_irqrestore(&dev->request_lock, flags); | |
fceaf24a HJ |
105 | |
106 | return request; | |
107 | } | |
108 | ||
9c26aa0d | 109 | static void put_rndis_request(struct rndis_device *dev, |
c2a4efdd | 110 | struct rndis_request *req) |
fceaf24a | 111 | { |
880fb89c GKH |
112 | unsigned long flags; |
113 | ||
c2a4efdd HZ |
114 | spin_lock_irqsave(&dev->request_lock, flags); |
115 | list_del(&req->list_ent); | |
116 | spin_unlock_irqrestore(&dev->request_lock, flags); | |
fceaf24a | 117 | |
c2a4efdd | 118 | kfree(req); |
fceaf24a HJ |
119 | } |
120 | ||
729a2849 HZ |
121 | static void dump_rndis_message(struct hv_device *hv_dev, |
122 | struct rndis_message *rndis_msg) | |
fceaf24a | 123 | { |
2ddd5e5f S |
124 | struct net_device *netdev; |
125 | struct netvsc_device *net_device; | |
126 | ||
127 | net_device = hv_get_drvdata(hv_dev); | |
128 | netdev = net_device->ndev; | |
729a2849 | 129 | |
a388eb17 | 130 | switch (rndis_msg->ndis_msg_type) { |
fceaf24a | 131 | case REMOTE_NDIS_PACKET_MSG: |
729a2849 | 132 | netdev_dbg(netdev, "REMOTE_NDIS_PACKET_MSG (len %u, " |
0120ee0d GKH |
133 | "data offset %u data len %u, # oob %u, " |
134 | "oob offset %u, oob len %u, pkt offset %u, " | |
729a2849 | 135 | "pkt len %u\n", |
a388eb17 HZ |
136 | rndis_msg->msg_len, |
137 | rndis_msg->msg.pkt.data_offset, | |
138 | rndis_msg->msg.pkt.data_len, | |
139 | rndis_msg->msg.pkt.num_oob_data_elements, | |
140 | rndis_msg->msg.pkt.oob_data_offset, | |
141 | rndis_msg->msg.pkt.oob_data_len, | |
142 | rndis_msg->msg.pkt.per_pkt_info_offset, | |
143 | rndis_msg->msg.pkt.per_pkt_info_len); | |
fceaf24a HJ |
144 | break; |
145 | ||
146 | case REMOTE_NDIS_INITIALIZE_CMPLT: | |
729a2849 | 147 | netdev_dbg(netdev, "REMOTE_NDIS_INITIALIZE_CMPLT " |
0120ee0d GKH |
148 | "(len %u, id 0x%x, status 0x%x, major %d, minor %d, " |
149 | "device flags %d, max xfer size 0x%x, max pkts %u, " | |
729a2849 | 150 | "pkt aligned %u)\n", |
a388eb17 HZ |
151 | rndis_msg->msg_len, |
152 | rndis_msg->msg.init_complete.req_id, | |
153 | rndis_msg->msg.init_complete.status, | |
154 | rndis_msg->msg.init_complete.major_ver, | |
155 | rndis_msg->msg.init_complete.minor_ver, | |
156 | rndis_msg->msg.init_complete.dev_flags, | |
157 | rndis_msg->msg.init_complete.max_xfer_size, | |
158 | rndis_msg->msg.init_complete. | |
159 | max_pkt_per_msg, | |
160 | rndis_msg->msg.init_complete. | |
161 | pkt_alignment_factor); | |
fceaf24a HJ |
162 | break; |
163 | ||
164 | case REMOTE_NDIS_QUERY_CMPLT: | |
729a2849 | 165 | netdev_dbg(netdev, "REMOTE_NDIS_QUERY_CMPLT " |
0120ee0d | 166 | "(len %u, id 0x%x, status 0x%x, buf len %u, " |
729a2849 | 167 | "buf offset %u)\n", |
a388eb17 HZ |
168 | rndis_msg->msg_len, |
169 | rndis_msg->msg.query_complete.req_id, | |
170 | rndis_msg->msg.query_complete.status, | |
171 | rndis_msg->msg.query_complete. | |
172 | info_buflen, | |
173 | rndis_msg->msg.query_complete. | |
174 | info_buf_offset); | |
fceaf24a HJ |
175 | break; |
176 | ||
177 | case REMOTE_NDIS_SET_CMPLT: | |
729a2849 HZ |
178 | netdev_dbg(netdev, |
179 | "REMOTE_NDIS_SET_CMPLT (len %u, id 0x%x, status 0x%x)\n", | |
a388eb17 HZ |
180 | rndis_msg->msg_len, |
181 | rndis_msg->msg.set_complete.req_id, | |
182 | rndis_msg->msg.set_complete.status); | |
fceaf24a HJ |
183 | break; |
184 | ||
185 | case REMOTE_NDIS_INDICATE_STATUS_MSG: | |
729a2849 HZ |
186 | netdev_dbg(netdev, "REMOTE_NDIS_INDICATE_STATUS_MSG " |
187 | "(len %u, status 0x%x, buf len %u, buf offset %u)\n", | |
a388eb17 HZ |
188 | rndis_msg->msg_len, |
189 | rndis_msg->msg.indicate_status.status, | |
190 | rndis_msg->msg.indicate_status.status_buflen, | |
191 | rndis_msg->msg.indicate_status.status_buf_offset); | |
fceaf24a HJ |
192 | break; |
193 | ||
194 | default: | |
729a2849 | 195 | netdev_dbg(netdev, "0x%x (len %u)\n", |
a388eb17 HZ |
196 | rndis_msg->ndis_msg_type, |
197 | rndis_msg->msg_len); | |
fceaf24a HJ |
198 | break; |
199 | } | |
200 | } | |
201 | ||
9c26aa0d | 202 | static int rndis_filter_send_request(struct rndis_device *dev, |
c2a4efdd | 203 | struct rndis_request *req) |
fceaf24a | 204 | { |
0120ee0d | 205 | int ret; |
4193d4f4 | 206 | struct hv_netvsc_packet *packet; |
fceaf24a | 207 | |
454f18a9 | 208 | /* Setup the packet to send it */ |
c2a4efdd | 209 | packet = &req->pkt; |
fceaf24a | 210 | |
72a2f5bd | 211 | packet->is_data_pkt = false; |
a388eb17 | 212 | packet->total_data_buflen = req->request_msg.msg_len; |
72a2f5bd | 213 | packet->page_buf_cnt = 1; |
fceaf24a | 214 | |
ca623ad3 | 215 | packet->page_buf[0].pfn = virt_to_phys(&req->request_msg) >> |
0120ee0d | 216 | PAGE_SHIFT; |
ca623ad3 HZ |
217 | packet->page_buf[0].len = req->request_msg.msg_len; |
218 | packet->page_buf[0].offset = | |
c2a4efdd | 219 | (unsigned long)&req->request_msg & (PAGE_SIZE - 1); |
fceaf24a | 220 | |
72a2f5bd HZ |
221 | packet->completion.send.send_completion_ctx = req;/* packet; */ |
222 | packet->completion.send.send_completion = | |
9c26aa0d | 223 | rndis_filter_send_request_completion; |
72a2f5bd | 224 | packet->completion.send.send_completion_tid = (unsigned long)dev; |
fceaf24a | 225 | |
0ec6ff40 | 226 | ret = netvsc_send(dev->net_dev->dev, packet); |
fceaf24a HJ |
227 | return ret; |
228 | } | |
229 | ||
9c26aa0d | 230 | static void rndis_filter_receive_response(struct rndis_device *dev, |
c2a4efdd | 231 | struct rndis_message *resp) |
fceaf24a | 232 | { |
e681b954 | 233 | struct rndis_request *request = NULL; |
0e727613 | 234 | bool found = false; |
880fb89c | 235 | unsigned long flags; |
2ddd5e5f S |
236 | struct net_device *ndev; |
237 | ||
238 | ndev = dev->net_dev->ndev; | |
fceaf24a | 239 | |
c2a4efdd HZ |
240 | spin_lock_irqsave(&dev->request_lock, flags); |
241 | list_for_each_entry(request, &dev->req_list, list_ent) { | |
0120ee0d GKH |
242 | /* |
243 | * All request/response message contains RequestId as the 1st | |
244 | * field | |
245 | */ | |
a388eb17 HZ |
246 | if (request->request_msg.msg.init_req.req_id |
247 | == resp->msg.init_complete.req_id) { | |
0e727613 | 248 | found = true; |
fceaf24a HJ |
249 | break; |
250 | } | |
251 | } | |
c2a4efdd | 252 | spin_unlock_irqrestore(&dev->request_lock, flags); |
fceaf24a | 253 | |
0120ee0d | 254 | if (found) { |
a388eb17 | 255 | if (resp->msg_len <= sizeof(struct rndis_message)) { |
c2a4efdd | 256 | memcpy(&request->response_msg, resp, |
a388eb17 | 257 | resp->msg_len); |
0120ee0d | 258 | } else { |
d9871158 | 259 | netdev_err(ndev, |
eb335bc4 HJ |
260 | "rndis response buffer overflow " |
261 | "detected (size %u max %zu)\n", | |
262 | resp->msg_len, | |
263 | sizeof(struct rndis_filter_packet)); | |
0120ee0d | 264 | |
a388eb17 | 265 | if (resp->ndis_msg_type == |
0120ee0d GKH |
266 | REMOTE_NDIS_RESET_CMPLT) { |
267 | /* does not have a request id field */ | |
a388eb17 HZ |
268 | request->response_msg.msg.reset_complete. |
269 | status = STATUS_BUFFER_OVERFLOW; | |
0120ee0d | 270 | } else { |
a388eb17 HZ |
271 | request->response_msg.msg. |
272 | init_complete.status = | |
c2a4efdd | 273 | STATUS_BUFFER_OVERFLOW; |
fceaf24a HJ |
274 | } |
275 | } | |
276 | ||
98d79690 | 277 | complete(&request->wait_event); |
0120ee0d | 278 | } else { |
d9871158 | 279 | netdev_err(ndev, |
eb335bc4 HJ |
280 | "no rndis request found for this response " |
281 | "(id 0x%x res type 0x%x)\n", | |
282 | resp->msg.init_complete.req_id, | |
283 | resp->ndis_msg_type); | |
fceaf24a | 284 | } |
fceaf24a HJ |
285 | } |
286 | ||
9c26aa0d | 287 | static void rndis_filter_receive_indicate_status(struct rndis_device *dev, |
c2a4efdd | 288 | struct rndis_message *resp) |
fceaf24a | 289 | { |
0120ee0d | 290 | struct rndis_indicate_status *indicate = |
a388eb17 | 291 | &resp->msg.indicate_status; |
fceaf24a | 292 | |
a388eb17 | 293 | if (indicate->status == RNDIS_STATUS_MEDIA_CONNECT) { |
39fb6aab | 294 | netvsc_linkstatus_callback( |
53d21fdb | 295 | dev->net_dev->dev, 1); |
a388eb17 | 296 | } else if (indicate->status == RNDIS_STATUS_MEDIA_DISCONNECT) { |
39fb6aab | 297 | netvsc_linkstatus_callback( |
53d21fdb | 298 | dev->net_dev->dev, 0); |
0120ee0d GKH |
299 | } else { |
300 | /* | |
301 | * TODO: | |
302 | */ | |
fceaf24a HJ |
303 | } |
304 | } | |
305 | ||
9c26aa0d | 306 | static void rndis_filter_receive_data(struct rndis_device *dev, |
c2a4efdd HZ |
307 | struct rndis_message *msg, |
308 | struct hv_netvsc_packet *pkt) | |
fceaf24a | 309 | { |
c2a4efdd HZ |
310 | struct rndis_packet *rndis_pkt; |
311 | u32 data_offset; | |
fceaf24a | 312 | |
a388eb17 | 313 | rndis_pkt = &msg->msg.pkt; |
fceaf24a | 314 | |
0120ee0d GKH |
315 | /* |
316 | * FIXME: Handle multiple rndis pkt msgs that maybe enclosed in this | |
317 | * netvsc packet (ie TotalDataBufferLength != MessageLength) | |
318 | */ | |
fceaf24a | 319 | |
454f18a9 | 320 | /* Remove the rndis header and pass it back up the stack */ |
a388eb17 | 321 | data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset; |
fceaf24a | 322 | |
72a2f5bd | 323 | pkt->total_data_buflen -= data_offset; |
4b8a8bc9 WY |
324 | |
325 | /* | |
326 | * Make sure we got a valid RNDIS message, now total_data_buflen | |
327 | * should be the data packet size plus the trailer padding size | |
328 | */ | |
329 | if (pkt->total_data_buflen < rndis_pkt->data_len) { | |
330 | netdev_err(dev->net_dev->ndev, "rndis message buffer " | |
331 | "overflow detected (got %u, min %u)" | |
332 | "...dropping this message!\n", | |
333 | pkt->total_data_buflen, rndis_pkt->data_len); | |
334 | return; | |
335 | } | |
336 | ||
337 | /* | |
338 | * Remove the rndis trailer padding from rndis packet message | |
339 | * rndis_pkt->data_len tell us the real data length, we only copy | |
340 | * the data packet to the stack, without the rndis trailer padding | |
341 | */ | |
342 | pkt->total_data_buflen = rndis_pkt->data_len; | |
45326342 | 343 | pkt->data = (void *)((unsigned long)pkt->data + data_offset); |
669c1fc6 | 344 | |
72a2f5bd | 345 | pkt->is_data_pkt = true; |
fceaf24a | 346 | |
a25e1dbe | 347 | netvsc_recv_callback(dev->net_dev->dev, pkt); |
fceaf24a HJ |
348 | } |
349 | ||
5fcc4115 | 350 | int rndis_filter_receive(struct hv_device *dev, |
c2a4efdd | 351 | struct hv_netvsc_packet *pkt) |
fceaf24a | 352 | { |
2ddd5e5f | 353 | struct netvsc_device *net_dev = hv_get_drvdata(dev); |
c2a4efdd HZ |
354 | struct rndis_device *rndis_dev; |
355 | struct rndis_message rndis_msg; | |
356 | struct rndis_message *rndis_hdr; | |
2ddd5e5f S |
357 | struct net_device *ndev; |
358 | ||
c2a4efdd | 359 | if (!net_dev) |
8a62d716 BP |
360 | return -EINVAL; |
361 | ||
715a4801 S |
362 | ndev = net_dev->ndev; |
363 | ||
454f18a9 | 364 | /* Make sure the rndis device state is initialized */ |
53d21fdb | 365 | if (!net_dev->extension) { |
d9871158 | 366 | netdev_err(ndev, "got rndis message but no rndis device - " |
eb335bc4 | 367 | "dropping this message!\n"); |
62c0743e | 368 | return -ENODEV; |
fceaf24a HJ |
369 | } |
370 | ||
53d21fdb | 371 | rndis_dev = (struct rndis_device *)net_dev->extension; |
c2a4efdd | 372 | if (rndis_dev->state == RNDIS_DEV_UNINITIALIZED) { |
d9871158 | 373 | netdev_err(ndev, "got rndis message but rndis device " |
eb335bc4 | 374 | "uninitialized...dropping this message!\n"); |
62c0743e | 375 | return -ENODEV; |
fceaf24a HJ |
376 | } |
377 | ||
45326342 | 378 | rndis_hdr = pkt->data; |
fceaf24a | 379 | |
454f18a9 | 380 | /* Make sure we got a valid rndis message */ |
a388eb17 HZ |
381 | if ((rndis_hdr->ndis_msg_type != REMOTE_NDIS_PACKET_MSG) && |
382 | (rndis_hdr->msg_len > sizeof(struct rndis_message))) { | |
d9871158 | 383 | netdev_err(ndev, "incoming rndis message buffer overflow " |
eb335bc4 | 384 | "detected (got %u, max %zu)..marking it an error!\n", |
a388eb17 | 385 | rndis_hdr->msg_len, |
0120ee0d | 386 | sizeof(struct rndis_message)); |
fceaf24a HJ |
387 | } |
388 | ||
c2a4efdd | 389 | memcpy(&rndis_msg, rndis_hdr, |
a388eb17 | 390 | (rndis_hdr->msg_len > sizeof(struct rndis_message)) ? |
0120ee0d | 391 | sizeof(struct rndis_message) : |
a388eb17 | 392 | rndis_hdr->msg_len); |
fceaf24a | 393 | |
729a2849 | 394 | dump_rndis_message(dev, &rndis_msg); |
fceaf24a | 395 | |
a388eb17 | 396 | switch (rndis_msg.ndis_msg_type) { |
fceaf24a | 397 | case REMOTE_NDIS_PACKET_MSG: |
0120ee0d | 398 | /* data msg */ |
9c26aa0d | 399 | rndis_filter_receive_data(rndis_dev, &rndis_msg, pkt); |
fceaf24a HJ |
400 | break; |
401 | ||
fceaf24a HJ |
402 | case REMOTE_NDIS_INITIALIZE_CMPLT: |
403 | case REMOTE_NDIS_QUERY_CMPLT: | |
404 | case REMOTE_NDIS_SET_CMPLT: | |
0120ee0d | 405 | /* completion msgs */ |
9c26aa0d | 406 | rndis_filter_receive_response(rndis_dev, &rndis_msg); |
fceaf24a HJ |
407 | break; |
408 | ||
fceaf24a | 409 | case REMOTE_NDIS_INDICATE_STATUS_MSG: |
0120ee0d | 410 | /* notification msgs */ |
9c26aa0d | 411 | rndis_filter_receive_indicate_status(rndis_dev, &rndis_msg); |
fceaf24a HJ |
412 | break; |
413 | default: | |
d9871158 | 414 | netdev_err(ndev, |
eb335bc4 | 415 | "unhandled rndis message (type %u len %u)\n", |
a388eb17 HZ |
416 | rndis_msg.ndis_msg_type, |
417 | rndis_msg.msg_len); | |
fceaf24a HJ |
418 | break; |
419 | } | |
420 | ||
fceaf24a HJ |
421 | return 0; |
422 | } | |
423 | ||
9c26aa0d | 424 | static int rndis_filter_query_device(struct rndis_device *dev, u32 oid, |
c2a4efdd | 425 | void *result, u32 *result_size) |
fceaf24a | 426 | { |
e681b954 | 427 | struct rndis_request *request; |
c2a4efdd | 428 | u32 inresult_size = *result_size; |
9f33d054 | 429 | struct rndis_query_request *query; |
c2a4efdd | 430 | struct rndis_query_complete *query_complete; |
0120ee0d | 431 | int ret = 0; |
98d79690 | 432 | int t; |
fceaf24a | 433 | |
c2a4efdd | 434 | if (!result) |
8a62d716 | 435 | return -EINVAL; |
fceaf24a | 436 | |
c2a4efdd | 437 | *result_size = 0; |
9c26aa0d | 438 | request = get_rndis_request(dev, REMOTE_NDIS_QUERY_MSG, |
0120ee0d GKH |
439 | RNDIS_MESSAGE_SIZE(struct rndis_query_request)); |
440 | if (!request) { | |
de6e0580 | 441 | ret = -ENOMEM; |
1c627870 | 442 | goto cleanup; |
fceaf24a HJ |
443 | } |
444 | ||
454f18a9 | 445 | /* Setup the rndis query */ |
a388eb17 HZ |
446 | query = &request->request_msg.msg.query_req; |
447 | query->oid = oid; | |
448 | query->info_buf_offset = sizeof(struct rndis_query_request); | |
449 | query->info_buflen = 0; | |
450 | query->dev_vc_handle = 0; | |
fceaf24a | 451 | |
9c26aa0d | 452 | ret = rndis_filter_send_request(dev, request); |
fceaf24a | 453 | if (ret != 0) |
1c627870 | 454 | goto cleanup; |
fceaf24a | 455 | |
5c5781b3 | 456 | t = wait_for_completion_timeout(&request->wait_event, 5*HZ); |
98d79690 | 457 | if (t == 0) { |
0c3b7b2f | 458 | ret = -ETIMEDOUT; |
1c627870 | 459 | goto cleanup; |
0c3b7b2f | 460 | } |
fceaf24a | 461 | |
454f18a9 | 462 | /* Copy the response back */ |
a388eb17 | 463 | query_complete = &request->response_msg.msg.query_complete; |
fceaf24a | 464 | |
a388eb17 | 465 | if (query_complete->info_buflen > inresult_size) { |
fceaf24a | 466 | ret = -1; |
1c627870 | 467 | goto cleanup; |
fceaf24a HJ |
468 | } |
469 | ||
c2a4efdd HZ |
470 | memcpy(result, |
471 | (void *)((unsigned long)query_complete + | |
a388eb17 HZ |
472 | query_complete->info_buf_offset), |
473 | query_complete->info_buflen); | |
fceaf24a | 474 | |
a388eb17 | 475 | *result_size = query_complete->info_buflen; |
fceaf24a | 476 | |
1c627870 | 477 | cleanup: |
fceaf24a | 478 | if (request) |
9c26aa0d | 479 | put_rndis_request(dev, request); |
fceaf24a HJ |
480 | |
481 | return ret; | |
482 | } | |
483 | ||
9c26aa0d | 484 | static int rndis_filter_query_device_mac(struct rndis_device *dev) |
fceaf24a | 485 | { |
9f8bd8ba | 486 | u32 size = ETH_ALEN; |
fceaf24a | 487 | |
9c26aa0d | 488 | return rndis_filter_query_device(dev, |
0120ee0d | 489 | RNDIS_OID_802_3_PERMANENT_ADDRESS, |
c2a4efdd | 490 | dev->hw_mac_adr, &size); |
fceaf24a HJ |
491 | } |
492 | ||
9c26aa0d | 493 | static int rndis_filter_query_device_link_status(struct rndis_device *dev) |
fceaf24a | 494 | { |
0120ee0d | 495 | u32 size = sizeof(u32); |
6f27457b S |
496 | u32 link_status; |
497 | int ret; | |
fceaf24a | 498 | |
6f27457b | 499 | ret = rndis_filter_query_device(dev, |
0120ee0d | 500 | RNDIS_OID_GEN_MEDIA_CONNECT_STATUS, |
6f27457b S |
501 | &link_status, &size); |
502 | dev->link_state = (link_status != 0) ? true : false; | |
503 | ||
504 | return ret; | |
fceaf24a HJ |
505 | } |
506 | ||
d426b2e3 | 507 | int rndis_filter_set_packet_filter(struct rndis_device *dev, u32 new_filter) |
fceaf24a | 508 | { |
e681b954 | 509 | struct rndis_request *request; |
9f33d054 | 510 | struct rndis_set_request *set; |
c2a4efdd | 511 | struct rndis_set_complete *set_complete; |
4d643114 | 512 | u32 status; |
98d79690 | 513 | int ret, t; |
2ddd5e5f S |
514 | struct net_device *ndev; |
515 | ||
516 | ndev = dev->net_dev->ndev; | |
fceaf24a | 517 | |
9c26aa0d | 518 | request = get_rndis_request(dev, REMOTE_NDIS_SET_MSG, |
0120ee0d GKH |
519 | RNDIS_MESSAGE_SIZE(struct rndis_set_request) + |
520 | sizeof(u32)); | |
521 | if (!request) { | |
58ef3977 | 522 | ret = -ENOMEM; |
1c627870 | 523 | goto cleanup; |
fceaf24a HJ |
524 | } |
525 | ||
454f18a9 | 526 | /* Setup the rndis set */ |
a388eb17 HZ |
527 | set = &request->request_msg.msg.set_req; |
528 | set->oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER; | |
529 | set->info_buflen = sizeof(u32); | |
530 | set->info_buf_offset = sizeof(struct rndis_set_request); | |
fceaf24a | 531 | |
0120ee0d | 532 | memcpy((void *)(unsigned long)set + sizeof(struct rndis_set_request), |
c2a4efdd | 533 | &new_filter, sizeof(u32)); |
fceaf24a | 534 | |
9c26aa0d | 535 | ret = rndis_filter_send_request(dev, request); |
fceaf24a | 536 | if (ret != 0) |
1c627870 | 537 | goto cleanup; |
fceaf24a | 538 | |
5c5781b3 | 539 | t = wait_for_completion_timeout(&request->wait_event, 5*HZ); |
98d79690 S |
540 | |
541 | if (t == 0) { | |
d9871158 | 542 | netdev_err(ndev, |
eb335bc4 | 543 | "timeout before we got a set response...\n"); |
0120ee0d | 544 | /* |
25985edc | 545 | * We can't deallocate the request since we may still receive a |
0120ee0d GKH |
546 | * send completion for it. |
547 | */ | |
5585d81e | 548 | goto exit; |
0120ee0d | 549 | } else { |
a388eb17 HZ |
550 | set_complete = &request->response_msg.msg.set_complete; |
551 | status = set_complete->status; | |
fceaf24a HJ |
552 | } |
553 | ||
1c627870 | 554 | cleanup: |
fceaf24a | 555 | if (request) |
9c26aa0d | 556 | put_rndis_request(dev, request); |
5585d81e | 557 | exit: |
fceaf24a HJ |
558 | return ret; |
559 | } | |
560 | ||
fceaf24a | 561 | |
9c26aa0d | 562 | static int rndis_filter_init_device(struct rndis_device *dev) |
fceaf24a | 563 | { |
e681b954 | 564 | struct rndis_request *request; |
9f33d054 | 565 | struct rndis_initialize_request *init; |
c2a4efdd | 566 | struct rndis_initialize_complete *init_complete; |
4d643114 | 567 | u32 status; |
98d79690 | 568 | int ret, t; |
fceaf24a | 569 | |
9c26aa0d | 570 | request = get_rndis_request(dev, REMOTE_NDIS_INITIALIZE_MSG, |
0120ee0d GKH |
571 | RNDIS_MESSAGE_SIZE(struct rndis_initialize_request)); |
572 | if (!request) { | |
bc49b926 | 573 | ret = -ENOMEM; |
1c627870 | 574 | goto cleanup; |
fceaf24a HJ |
575 | } |
576 | ||
454f18a9 | 577 | /* Setup the rndis set */ |
a388eb17 HZ |
578 | init = &request->request_msg.msg.init_req; |
579 | init->major_ver = RNDIS_MAJOR_VERSION; | |
580 | init->minor_ver = RNDIS_MINOR_VERSION; | |
0120ee0d | 581 | /* FIXME: Use 1536 - rounded ethernet frame size */ |
a388eb17 | 582 | init->max_xfer_size = 2048; |
fceaf24a | 583 | |
c2a4efdd | 584 | dev->state = RNDIS_DEV_INITIALIZING; |
fceaf24a | 585 | |
9c26aa0d | 586 | ret = rndis_filter_send_request(dev, request); |
0120ee0d | 587 | if (ret != 0) { |
c2a4efdd | 588 | dev->state = RNDIS_DEV_UNINITIALIZED; |
1c627870 | 589 | goto cleanup; |
fceaf24a HJ |
590 | } |
591 | ||
0c3b7b2f | 592 | |
5c5781b3 | 593 | t = wait_for_completion_timeout(&request->wait_event, 5*HZ); |
98d79690 S |
594 | |
595 | if (t == 0) { | |
0c3b7b2f | 596 | ret = -ETIMEDOUT; |
1c627870 | 597 | goto cleanup; |
0c3b7b2f | 598 | } |
fceaf24a | 599 | |
a388eb17 HZ |
600 | init_complete = &request->response_msg.msg.init_complete; |
601 | status = init_complete->status; | |
0120ee0d | 602 | if (status == RNDIS_STATUS_SUCCESS) { |
c2a4efdd | 603 | dev->state = RNDIS_DEV_INITIALIZED; |
fceaf24a | 604 | ret = 0; |
0120ee0d | 605 | } else { |
c2a4efdd | 606 | dev->state = RNDIS_DEV_UNINITIALIZED; |
bc49b926 | 607 | ret = -EINVAL; |
fceaf24a HJ |
608 | } |
609 | ||
1c627870 | 610 | cleanup: |
fceaf24a | 611 | if (request) |
9c26aa0d | 612 | put_rndis_request(dev, request); |
fceaf24a HJ |
613 | |
614 | return ret; | |
615 | } | |
616 | ||
9c26aa0d | 617 | static void rndis_filter_halt_device(struct rndis_device *dev) |
fceaf24a | 618 | { |
e681b954 | 619 | struct rndis_request *request; |
9f33d054 | 620 | struct rndis_halt_request *halt; |
fceaf24a | 621 | |
454f18a9 | 622 | /* Attempt to do a rndis device halt */ |
9c26aa0d | 623 | request = get_rndis_request(dev, REMOTE_NDIS_HALT_MSG, |
0120ee0d | 624 | RNDIS_MESSAGE_SIZE(struct rndis_halt_request)); |
fceaf24a | 625 | if (!request) |
1c627870 | 626 | goto cleanup; |
fceaf24a | 627 | |
454f18a9 | 628 | /* Setup the rndis set */ |
a388eb17 HZ |
629 | halt = &request->request_msg.msg.halt_req; |
630 | halt->req_id = atomic_inc_return(&dev->new_req_id); | |
fceaf24a | 631 | |
454f18a9 | 632 | /* Ignore return since this msg is optional. */ |
9c26aa0d | 633 | rndis_filter_send_request(dev, request); |
fceaf24a | 634 | |
c2a4efdd | 635 | dev->state = RNDIS_DEV_UNINITIALIZED; |
fceaf24a | 636 | |
1c627870 | 637 | cleanup: |
fceaf24a | 638 | if (request) |
9c26aa0d | 639 | put_rndis_request(dev, request); |
fceaf24a HJ |
640 | return; |
641 | } | |
642 | ||
9c26aa0d | 643 | static int rndis_filter_open_device(struct rndis_device *dev) |
fceaf24a | 644 | { |
0120ee0d | 645 | int ret; |
fceaf24a | 646 | |
c2a4efdd | 647 | if (dev->state != RNDIS_DEV_INITIALIZED) |
fceaf24a HJ |
648 | return 0; |
649 | ||
9c26aa0d | 650 | ret = rndis_filter_set_packet_filter(dev, |
0120ee0d | 651 | NDIS_PACKET_TYPE_BROADCAST | |
95beae90 | 652 | NDIS_PACKET_TYPE_ALL_MULTICAST | |
0120ee0d | 653 | NDIS_PACKET_TYPE_DIRECTED); |
fceaf24a | 654 | if (ret == 0) |
c2a4efdd | 655 | dev->state = RNDIS_DEV_DATAINITIALIZED; |
fceaf24a | 656 | |
fceaf24a HJ |
657 | return ret; |
658 | } | |
659 | ||
9c26aa0d | 660 | static int rndis_filter_close_device(struct rndis_device *dev) |
fceaf24a HJ |
661 | { |
662 | int ret; | |
663 | ||
c2a4efdd | 664 | if (dev->state != RNDIS_DEV_DATAINITIALIZED) |
fceaf24a HJ |
665 | return 0; |
666 | ||
9c26aa0d | 667 | ret = rndis_filter_set_packet_filter(dev, 0); |
fceaf24a | 668 | if (ret == 0) |
c2a4efdd | 669 | dev->state = RNDIS_DEV_INITIALIZED; |
fceaf24a | 670 | |
fceaf24a HJ |
671 | return ret; |
672 | } | |
673 | ||
bdbad576 | 674 | int rndis_filter_device_add(struct hv_device *dev, |
c2a4efdd | 675 | void *additional_info) |
fceaf24a HJ |
676 | { |
677 | int ret; | |
86c921af | 678 | struct netvsc_device *net_device; |
b13cc345 | 679 | struct rndis_device *rndis_device; |
3c4debad | 680 | struct netvsc_device_info *device_info = additional_info; |
fceaf24a | 681 | |
b13cc345 S |
682 | rndis_device = get_rndis_device(); |
683 | if (!rndis_device) | |
327efbae | 684 | return -ENODEV; |
fceaf24a | 685 | |
0120ee0d GKH |
686 | /* |
687 | * Let the inner driver handle this first to create the netvsc channel | |
688 | * NOTE! Once the channel is created, we may get a receive callback | |
689 | * (RndisFilterOnReceive()) before this call is completed | |
690 | */ | |
ce5bf661 | 691 | ret = netvsc_device_add(dev, additional_info); |
0120ee0d | 692 | if (ret != 0) { |
b13cc345 | 693 | kfree(rndis_device); |
fceaf24a HJ |
694 | return ret; |
695 | } | |
696 | ||
454f18a9 BP |
697 | |
698 | /* Initialize the rndis device */ | |
86c921af | 699 | net_device = hv_get_drvdata(dev); |
fceaf24a | 700 | |
b13cc345 S |
701 | net_device->extension = rndis_device; |
702 | rndis_device->net_dev = net_device; | |
fceaf24a | 703 | |
454f18a9 | 704 | /* Send the rndis initialization message */ |
b13cc345 | 705 | ret = rndis_filter_init_device(rndis_device); |
0120ee0d GKH |
706 | if (ret != 0) { |
707 | /* | |
708 | * TODO: If rndis init failed, we will need to shut down the | |
709 | * channel | |
710 | */ | |
fceaf24a HJ |
711 | } |
712 | ||
454f18a9 | 713 | /* Get the mac address */ |
b13cc345 | 714 | ret = rndis_filter_query_device_mac(rndis_device); |
0120ee0d GKH |
715 | if (ret != 0) { |
716 | /* | |
717 | * TODO: shutdown rndis device and the channel | |
718 | */ | |
fceaf24a HJ |
719 | } |
720 | ||
3c4debad | 721 | memcpy(device_info->mac_adr, rndis_device->hw_mac_adr, ETH_ALEN); |
fceaf24a | 722 | |
b13cc345 | 723 | rndis_filter_query_device_link_status(rndis_device); |
fceaf24a | 724 | |
6f27457b | 725 | device_info->link_state = rndis_device->link_state; |
eb335bc4 | 726 | |
6f27457b | 727 | dev_info(&dev->device, "Device MAC %pM link state %s\n", |
b13cc345 | 728 | rndis_device->hw_mac_adr, |
6f27457b | 729 | device_info->link_state ? "down" : "up"); |
fceaf24a | 730 | |
fceaf24a HJ |
731 | return ret; |
732 | } | |
733 | ||
df06bcff | 734 | void rndis_filter_device_remove(struct hv_device *dev) |
fceaf24a | 735 | { |
2ddd5e5f | 736 | struct netvsc_device *net_dev = hv_get_drvdata(dev); |
53d21fdb | 737 | struct rndis_device *rndis_dev = net_dev->extension; |
fceaf24a | 738 | |
454f18a9 | 739 | /* Halt and release the rndis device */ |
9c26aa0d | 740 | rndis_filter_halt_device(rndis_dev); |
fceaf24a | 741 | |
c2a4efdd | 742 | kfree(rndis_dev); |
53d21fdb | 743 | net_dev->extension = NULL; |
fceaf24a | 744 | |
3fae5c8f | 745 | netvsc_device_remove(dev); |
fceaf24a HJ |
746 | } |
747 | ||
fceaf24a | 748 | |
9c26aa0d | 749 | int rndis_filter_open(struct hv_device *dev) |
fceaf24a | 750 | { |
86c921af | 751 | struct netvsc_device *net_device = hv_get_drvdata(dev); |
fceaf24a | 752 | |
86c921af | 753 | if (!net_device) |
8a62d716 BP |
754 | return -EINVAL; |
755 | ||
86c921af | 756 | return rndis_filter_open_device(net_device->extension); |
fceaf24a HJ |
757 | } |
758 | ||
9c26aa0d | 759 | int rndis_filter_close(struct hv_device *dev) |
fceaf24a | 760 | { |
2ddd5e5f | 761 | struct netvsc_device *netDevice = hv_get_drvdata(dev); |
fceaf24a | 762 | |
8a62d716 BP |
763 | if (!netDevice) |
764 | return -EINVAL; | |
765 | ||
53d21fdb | 766 | return rndis_filter_close_device(netDevice->extension); |
fceaf24a HJ |
767 | } |
768 | ||
0652aebc | 769 | int rndis_filter_send(struct hv_device *dev, |
c2a4efdd | 770 | struct hv_netvsc_packet *pkt) |
fceaf24a | 771 | { |
0120ee0d | 772 | int ret; |
e681b954 | 773 | struct rndis_filter_packet *filterPacket; |
9f33d054 GKH |
774 | struct rndis_message *rndisMessage; |
775 | struct rndis_packet *rndisPacket; | |
4d643114 | 776 | u32 rndisMessageSize; |
fceaf24a | 777 | |
454f18a9 | 778 | /* Add the rndis header */ |
72a2f5bd | 779 | filterPacket = (struct rndis_filter_packet *)pkt->extension; |
fceaf24a | 780 | |
e681b954 | 781 | memset(filterPacket, 0, sizeof(struct rndis_filter_packet)); |
fceaf24a | 782 | |
c2a4efdd | 783 | rndisMessage = &filterPacket->msg; |
9f33d054 | 784 | rndisMessageSize = RNDIS_MESSAGE_SIZE(struct rndis_packet); |
fceaf24a | 785 | |
a388eb17 HZ |
786 | rndisMessage->ndis_msg_type = REMOTE_NDIS_PACKET_MSG; |
787 | rndisMessage->msg_len = pkt->total_data_buflen + | |
0120ee0d | 788 | rndisMessageSize; |
fceaf24a | 789 | |
a388eb17 HZ |
790 | rndisPacket = &rndisMessage->msg.pkt; |
791 | rndisPacket->data_offset = sizeof(struct rndis_packet); | |
792 | rndisPacket->data_len = pkt->total_data_buflen; | |
fceaf24a | 793 | |
72a2f5bd | 794 | pkt->is_data_pkt = true; |
ca623ad3 HZ |
795 | pkt->page_buf[0].pfn = virt_to_phys(rndisMessage) >> PAGE_SHIFT; |
796 | pkt->page_buf[0].offset = | |
0120ee0d | 797 | (unsigned long)rndisMessage & (PAGE_SIZE-1); |
ca623ad3 | 798 | pkt->page_buf[0].len = rndisMessageSize; |
fceaf24a | 799 | |
c31c151b HZ |
800 | /* Add one page_buf if the rndis msg goes beyond page boundary */ |
801 | if (pkt->page_buf[0].offset + rndisMessageSize > PAGE_SIZE) { | |
802 | int i; | |
803 | for (i = pkt->page_buf_cnt; i > 1; i--) | |
804 | pkt->page_buf[i] = pkt->page_buf[i-1]; | |
805 | pkt->page_buf_cnt++; | |
806 | pkt->page_buf[0].len = PAGE_SIZE - pkt->page_buf[0].offset; | |
807 | pkt->page_buf[1].pfn = virt_to_phys((void *)((ulong) | |
808 | rndisMessage + pkt->page_buf[0].len)) >> PAGE_SHIFT; | |
809 | pkt->page_buf[1].offset = 0; | |
810 | pkt->page_buf[1].len = rndisMessageSize - pkt->page_buf[0].len; | |
811 | } | |
812 | ||
454f18a9 | 813 | /* Save the packet send completion and context */ |
72a2f5bd | 814 | filterPacket->completion = pkt->completion.send.send_completion; |
c2a4efdd | 815 | filterPacket->completion_ctx = |
72a2f5bd | 816 | pkt->completion.send.send_completion_ctx; |
fceaf24a | 817 | |
454f18a9 | 818 | /* Use ours */ |
72a2f5bd HZ |
819 | pkt->completion.send.send_completion = rndis_filter_send_completion; |
820 | pkt->completion.send.send_completion_ctx = filterPacket; | |
fceaf24a | 821 | |
0ec6ff40 | 822 | ret = netvsc_send(dev, pkt); |
0120ee0d GKH |
823 | if (ret != 0) { |
824 | /* | |
825 | * Reset the completion to originals to allow retries from | |
826 | * above | |
827 | */ | |
72a2f5bd | 828 | pkt->completion.send.send_completion = |
c2a4efdd | 829 | filterPacket->completion; |
72a2f5bd | 830 | pkt->completion.send.send_completion_ctx = |
c2a4efdd | 831 | filterPacket->completion_ctx; |
fceaf24a HJ |
832 | } |
833 | ||
fceaf24a HJ |
834 | return ret; |
835 | } | |
836 | ||
9c26aa0d | 837 | static void rndis_filter_send_completion(void *ctx) |
fceaf24a | 838 | { |
c2a4efdd | 839 | struct rndis_filter_packet *filterPacket = ctx; |
fceaf24a | 840 | |
454f18a9 | 841 | /* Pass it back to the original handler */ |
c2a4efdd | 842 | filterPacket->completion(filterPacket->completion_ctx); |
fceaf24a HJ |
843 | } |
844 | ||
845 | ||
9c26aa0d | 846 | static void rndis_filter_send_request_completion(void *ctx) |
fceaf24a | 847 | { |
454f18a9 | 848 | /* Noop */ |
fceaf24a | 849 | } |