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Commit | Line | Data |
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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> |
45da89e5 | 22 | #include <linux/highmem.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
0120ee0d | 24 | #include <linux/io.h> |
9f8bd8ba SH |
25 | #include <linux/if_ether.h> |
26 | ||
4983b39a | 27 | #include "osd.h" |
645954c5 | 28 | #include "logging.h" |
a82c7a2a | 29 | #include "netvsc_api.h" |
043efcc3 | 30 | #include "rndis_filter.h" |
fceaf24a | 31 | |
454f18a9 | 32 | /* Data types */ |
e681b954 | 33 | struct rndis_filter_driver_object { |
454f18a9 | 34 | /* The original driver */ |
c2a4efdd | 35 | struct netvsc_driver inner_drv; |
e681b954 | 36 | }; |
fceaf24a | 37 | |
e681b954 | 38 | enum rndis_device_state { |
fceaf24a HJ |
39 | RNDIS_DEV_UNINITIALIZED = 0, |
40 | RNDIS_DEV_INITIALIZING, | |
41 | RNDIS_DEV_INITIALIZED, | |
42 | RNDIS_DEV_DATAINITIALIZED, | |
e681b954 | 43 | }; |
fceaf24a | 44 | |
e681b954 | 45 | struct rndis_device { |
c2a4efdd | 46 | struct netvsc_device *net_dev; |
fceaf24a | 47 | |
c2a4efdd HZ |
48 | enum rndis_device_state state; |
49 | u32 link_stat; | |
50 | atomic_t new_req_id; | |
fceaf24a | 51 | |
880fb89c | 52 | spinlock_t request_lock; |
c2a4efdd | 53 | struct list_head req_list; |
fceaf24a | 54 | |
c2a4efdd | 55 | unsigned char hw_mac_adr[ETH_ALEN]; |
e681b954 | 56 | }; |
fceaf24a | 57 | |
e681b954 | 58 | struct rndis_request { |
c2a4efdd HZ |
59 | struct list_head list_ent; |
60 | struct osd_waitevent *waitevent; | |
fceaf24a | 61 | |
0120ee0d GKH |
62 | /* |
63 | * FIXME: We assumed a fixed size response here. If we do ever need to | |
64 | * handle a bigger response, we can either define a max response | |
65 | * message or add a response buffer variable above this field | |
66 | */ | |
c2a4efdd | 67 | struct rndis_message response_msg; |
fceaf24a | 68 | |
454f18a9 | 69 | /* Simplify allocation by having a netvsc packet inline */ |
c2a4efdd HZ |
70 | struct hv_netvsc_packet pkt; |
71 | struct hv_page_buffer buf; | |
454f18a9 | 72 | /* FIXME: We assumed a fixed size request here. */ |
c2a4efdd | 73 | struct rndis_message request_msg; |
e681b954 | 74 | }; |
fceaf24a HJ |
75 | |
76 | ||
e681b954 | 77 | struct rndis_filter_packet { |
c2a4efdd HZ |
78 | void *completion_ctx; |
79 | void (*completion)(void *context); | |
80 | struct rndis_message msg; | |
e681b954 | 81 | }; |
fceaf24a | 82 | |
454f18a9 | 83 | |
9c26aa0d | 84 | static int rndis_filte_device_add(struct hv_device *dev, |
c2a4efdd | 85 | void *additional_info); |
454f18a9 | 86 | |
9c26aa0d | 87 | static int rndis_filter_device_remove(struct hv_device *dev); |
fceaf24a | 88 | |
9c26aa0d | 89 | static void rndis_filter_cleanup(struct hv_driver *drv); |
fceaf24a | 90 | |
9c26aa0d | 91 | static int rndis_filter_send(struct hv_device *dev, |
c2a4efdd | 92 | struct hv_netvsc_packet *pkt); |
0120ee0d | 93 | |
9c26aa0d | 94 | static void rndis_filter_send_completion(void *ctx); |
0120ee0d | 95 | |
9c26aa0d | 96 | static void rndis_filter_send_request_completion(void *ctx); |
454f18a9 BP |
97 | |
98 | ||
99 | /* The one and only */ | |
c2a4efdd | 100 | static struct rndis_filter_driver_object rndis_filter; |
fceaf24a | 101 | |
9c26aa0d | 102 | static struct rndis_device *get_rndis_device(void) |
fceaf24a | 103 | { |
e681b954 | 104 | struct rndis_device *device; |
fceaf24a | 105 | |
e681b954 | 106 | device = kzalloc(sizeof(struct rndis_device), GFP_KERNEL); |
fceaf24a | 107 | if (!device) |
fceaf24a | 108 | return NULL; |
fceaf24a | 109 | |
880fb89c | 110 | spin_lock_init(&device->request_lock); |
fceaf24a | 111 | |
c2a4efdd | 112 | INIT_LIST_HEAD(&device->req_list); |
fceaf24a | 113 | |
c2a4efdd | 114 | device->state = RNDIS_DEV_UNINITIALIZED; |
fceaf24a HJ |
115 | |
116 | return device; | |
117 | } | |
118 | ||
9c26aa0d | 119 | static struct rndis_request *get_rndis_request(struct rndis_device *dev, |
c2a4efdd HZ |
120 | u32 msg_type, |
121 | u32 msg_len) | |
fceaf24a | 122 | { |
e681b954 | 123 | struct rndis_request *request; |
c2a4efdd | 124 | struct rndis_message *rndis_msg; |
9f33d054 | 125 | struct rndis_set_request *set; |
880fb89c | 126 | unsigned long flags; |
fceaf24a | 127 | |
e681b954 | 128 | request = kzalloc(sizeof(struct rndis_request), GFP_KERNEL); |
fceaf24a | 129 | if (!request) |
fceaf24a | 130 | return NULL; |
fceaf24a | 131 | |
c2a4efdd HZ |
132 | request->waitevent = osd_waitevent_create(); |
133 | if (!request->waitevent) { | |
8c69f52a | 134 | kfree(request); |
fceaf24a HJ |
135 | return NULL; |
136 | } | |
137 | ||
c2a4efdd | 138 | rndis_msg = &request->request_msg; |
a388eb17 HZ |
139 | rndis_msg->ndis_msg_type = msg_type; |
140 | rndis_msg->msg_len = msg_len; | |
fceaf24a | 141 | |
0120ee0d GKH |
142 | /* |
143 | * Set the request id. This field is always after the rndis header for | |
144 | * request/response packet types so we just used the SetRequest as a | |
145 | * template | |
146 | */ | |
a388eb17 HZ |
147 | set = &rndis_msg->msg.set_req; |
148 | set->req_id = atomic_inc_return(&dev->new_req_id); | |
fceaf24a | 149 | |
454f18a9 | 150 | /* Add to the request list */ |
c2a4efdd HZ |
151 | spin_lock_irqsave(&dev->request_lock, flags); |
152 | list_add_tail(&request->list_ent, &dev->req_list); | |
153 | spin_unlock_irqrestore(&dev->request_lock, flags); | |
fceaf24a HJ |
154 | |
155 | return request; | |
156 | } | |
157 | ||
9c26aa0d | 158 | static void put_rndis_request(struct rndis_device *dev, |
c2a4efdd | 159 | struct rndis_request *req) |
fceaf24a | 160 | { |
880fb89c GKH |
161 | unsigned long flags; |
162 | ||
c2a4efdd HZ |
163 | spin_lock_irqsave(&dev->request_lock, flags); |
164 | list_del(&req->list_ent); | |
165 | spin_unlock_irqrestore(&dev->request_lock, flags); | |
fceaf24a | 166 | |
c2a4efdd HZ |
167 | kfree(req->waitevent); |
168 | kfree(req); | |
fceaf24a HJ |
169 | } |
170 | ||
9c26aa0d | 171 | static void dump_rndis_message(struct rndis_message *rndis_msg) |
fceaf24a | 172 | { |
a388eb17 | 173 | switch (rndis_msg->ndis_msg_type) { |
fceaf24a | 174 | case REMOTE_NDIS_PACKET_MSG: |
0120ee0d GKH |
175 | DPRINT_DBG(NETVSC, "REMOTE_NDIS_PACKET_MSG (len %u, " |
176 | "data offset %u data len %u, # oob %u, " | |
177 | "oob offset %u, oob len %u, pkt offset %u, " | |
178 | "pkt len %u", | |
a388eb17 HZ |
179 | rndis_msg->msg_len, |
180 | rndis_msg->msg.pkt.data_offset, | |
181 | rndis_msg->msg.pkt.data_len, | |
182 | rndis_msg->msg.pkt.num_oob_data_elements, | |
183 | rndis_msg->msg.pkt.oob_data_offset, | |
184 | rndis_msg->msg.pkt.oob_data_len, | |
185 | rndis_msg->msg.pkt.per_pkt_info_offset, | |
186 | rndis_msg->msg.pkt.per_pkt_info_len); | |
fceaf24a HJ |
187 | break; |
188 | ||
189 | case REMOTE_NDIS_INITIALIZE_CMPLT: | |
0120ee0d GKH |
190 | DPRINT_DBG(NETVSC, "REMOTE_NDIS_INITIALIZE_CMPLT " |
191 | "(len %u, id 0x%x, status 0x%x, major %d, minor %d, " | |
192 | "device flags %d, max xfer size 0x%x, max pkts %u, " | |
193 | "pkt aligned %u)", | |
a388eb17 HZ |
194 | rndis_msg->msg_len, |
195 | rndis_msg->msg.init_complete.req_id, | |
196 | rndis_msg->msg.init_complete.status, | |
197 | rndis_msg->msg.init_complete.major_ver, | |
198 | rndis_msg->msg.init_complete.minor_ver, | |
199 | rndis_msg->msg.init_complete.dev_flags, | |
200 | rndis_msg->msg.init_complete.max_xfer_size, | |
201 | rndis_msg->msg.init_complete. | |
202 | max_pkt_per_msg, | |
203 | rndis_msg->msg.init_complete. | |
204 | pkt_alignment_factor); | |
fceaf24a HJ |
205 | break; |
206 | ||
207 | case REMOTE_NDIS_QUERY_CMPLT: | |
0120ee0d GKH |
208 | DPRINT_DBG(NETVSC, "REMOTE_NDIS_QUERY_CMPLT " |
209 | "(len %u, id 0x%x, status 0x%x, buf len %u, " | |
210 | "buf offset %u)", | |
a388eb17 HZ |
211 | rndis_msg->msg_len, |
212 | rndis_msg->msg.query_complete.req_id, | |
213 | rndis_msg->msg.query_complete.status, | |
214 | rndis_msg->msg.query_complete. | |
215 | info_buflen, | |
216 | rndis_msg->msg.query_complete. | |
217 | info_buf_offset); | |
fceaf24a HJ |
218 | break; |
219 | ||
220 | case REMOTE_NDIS_SET_CMPLT: | |
0120ee0d GKH |
221 | DPRINT_DBG(NETVSC, |
222 | "REMOTE_NDIS_SET_CMPLT (len %u, id 0x%x, status 0x%x)", | |
a388eb17 HZ |
223 | rndis_msg->msg_len, |
224 | rndis_msg->msg.set_complete.req_id, | |
225 | rndis_msg->msg.set_complete.status); | |
fceaf24a HJ |
226 | break; |
227 | ||
228 | case REMOTE_NDIS_INDICATE_STATUS_MSG: | |
0120ee0d GKH |
229 | DPRINT_DBG(NETVSC, "REMOTE_NDIS_INDICATE_STATUS_MSG " |
230 | "(len %u, status 0x%x, buf len %u, buf offset %u)", | |
a388eb17 HZ |
231 | rndis_msg->msg_len, |
232 | rndis_msg->msg.indicate_status.status, | |
233 | rndis_msg->msg.indicate_status.status_buflen, | |
234 | rndis_msg->msg.indicate_status.status_buf_offset); | |
fceaf24a HJ |
235 | break; |
236 | ||
237 | default: | |
238 | DPRINT_DBG(NETVSC, "0x%x (len %u)", | |
a388eb17 HZ |
239 | rndis_msg->ndis_msg_type, |
240 | rndis_msg->msg_len); | |
fceaf24a HJ |
241 | break; |
242 | } | |
243 | } | |
244 | ||
9c26aa0d | 245 | static int rndis_filter_send_request(struct rndis_device *dev, |
c2a4efdd | 246 | struct rndis_request *req) |
fceaf24a | 247 | { |
0120ee0d | 248 | int ret; |
4193d4f4 | 249 | struct hv_netvsc_packet *packet; |
fceaf24a | 250 | |
454f18a9 | 251 | /* Setup the packet to send it */ |
c2a4efdd | 252 | packet = &req->pkt; |
fceaf24a | 253 | |
72a2f5bd | 254 | packet->is_data_pkt = false; |
a388eb17 | 255 | packet->total_data_buflen = req->request_msg.msg_len; |
72a2f5bd | 256 | packet->page_buf_cnt = 1; |
fceaf24a | 257 | |
72a2f5bd | 258 | packet->page_buf[0].Pfn = virt_to_phys(&req->request_msg) >> |
0120ee0d | 259 | PAGE_SHIFT; |
a388eb17 | 260 | packet->page_buf[0].Length = req->request_msg.msg_len; |
72a2f5bd | 261 | packet->page_buf[0].Offset = |
c2a4efdd | 262 | (unsigned long)&req->request_msg & (PAGE_SIZE - 1); |
fceaf24a | 263 | |
72a2f5bd HZ |
264 | packet->completion.send.send_completion_ctx = req;/* packet; */ |
265 | packet->completion.send.send_completion = | |
9c26aa0d | 266 | rndis_filter_send_request_completion; |
72a2f5bd | 267 | packet->completion.send.send_completion_tid = (unsigned long)dev; |
fceaf24a | 268 | |
53d21fdb | 269 | ret = rndis_filter.inner_drv.send(dev->net_dev->dev, packet); |
fceaf24a HJ |
270 | return ret; |
271 | } | |
272 | ||
9c26aa0d | 273 | static void rndis_filter_receive_response(struct rndis_device *dev, |
c2a4efdd | 274 | struct rndis_message *resp) |
fceaf24a | 275 | { |
e681b954 | 276 | struct rndis_request *request = NULL; |
0e727613 | 277 | bool found = false; |
880fb89c | 278 | unsigned long flags; |
fceaf24a | 279 | |
c2a4efdd HZ |
280 | spin_lock_irqsave(&dev->request_lock, flags); |
281 | list_for_each_entry(request, &dev->req_list, list_ent) { | |
0120ee0d GKH |
282 | /* |
283 | * All request/response message contains RequestId as the 1st | |
284 | * field | |
285 | */ | |
a388eb17 HZ |
286 | if (request->request_msg.msg.init_req.req_id |
287 | == resp->msg.init_complete.req_id) { | |
0120ee0d GKH |
288 | DPRINT_DBG(NETVSC, "found rndis request for " |
289 | "this response (id 0x%x req type 0x%x res " | |
290 | "type 0x%x)", | |
a388eb17 HZ |
291 | request->request_msg.msg. |
292 | init_req.req_id, | |
293 | request->request_msg.ndis_msg_type, | |
294 | resp->ndis_msg_type); | |
fceaf24a | 295 | |
0e727613 | 296 | found = true; |
fceaf24a HJ |
297 | break; |
298 | } | |
299 | } | |
c2a4efdd | 300 | spin_unlock_irqrestore(&dev->request_lock, flags); |
fceaf24a | 301 | |
0120ee0d | 302 | if (found) { |
a388eb17 | 303 | if (resp->msg_len <= sizeof(struct rndis_message)) { |
c2a4efdd | 304 | memcpy(&request->response_msg, resp, |
a388eb17 | 305 | resp->msg_len); |
0120ee0d GKH |
306 | } else { |
307 | DPRINT_ERR(NETVSC, "rndis response buffer overflow " | |
308 | "detected (size %u max %zu)", | |
a388eb17 | 309 | resp->msg_len, |
0120ee0d GKH |
310 | sizeof(struct rndis_filter_packet)); |
311 | ||
a388eb17 | 312 | if (resp->ndis_msg_type == |
0120ee0d GKH |
313 | REMOTE_NDIS_RESET_CMPLT) { |
314 | /* does not have a request id field */ | |
a388eb17 HZ |
315 | request->response_msg.msg.reset_complete. |
316 | status = STATUS_BUFFER_OVERFLOW; | |
0120ee0d | 317 | } else { |
a388eb17 HZ |
318 | request->response_msg.msg. |
319 | init_complete.status = | |
c2a4efdd | 320 | STATUS_BUFFER_OVERFLOW; |
fceaf24a HJ |
321 | } |
322 | } | |
323 | ||
c2a4efdd | 324 | osd_waitevent_set(request->waitevent); |
0120ee0d GKH |
325 | } else { |
326 | DPRINT_ERR(NETVSC, "no rndis request found for this response " | |
327 | "(id 0x%x res type 0x%x)", | |
a388eb17 HZ |
328 | resp->msg.init_complete.req_id, |
329 | resp->ndis_msg_type); | |
fceaf24a | 330 | } |
fceaf24a HJ |
331 | } |
332 | ||
9c26aa0d | 333 | static void rndis_filter_receive_indicate_status(struct rndis_device *dev, |
c2a4efdd | 334 | struct rndis_message *resp) |
fceaf24a | 335 | { |
0120ee0d | 336 | struct rndis_indicate_status *indicate = |
a388eb17 | 337 | &resp->msg.indicate_status; |
fceaf24a | 338 | |
a388eb17 | 339 | if (indicate->status == RNDIS_STATUS_MEDIA_CONNECT) { |
72a2f5bd | 340 | rndis_filter.inner_drv.link_status_change( |
53d21fdb | 341 | dev->net_dev->dev, 1); |
a388eb17 | 342 | } else if (indicate->status == RNDIS_STATUS_MEDIA_DISCONNECT) { |
72a2f5bd | 343 | rndis_filter.inner_drv.link_status_change( |
53d21fdb | 344 | dev->net_dev->dev, 0); |
0120ee0d GKH |
345 | } else { |
346 | /* | |
347 | * TODO: | |
348 | */ | |
fceaf24a HJ |
349 | } |
350 | } | |
351 | ||
9c26aa0d | 352 | static void rndis_filter_receive_data(struct rndis_device *dev, |
c2a4efdd HZ |
353 | struct rndis_message *msg, |
354 | struct hv_netvsc_packet *pkt) | |
fceaf24a | 355 | { |
c2a4efdd HZ |
356 | struct rndis_packet *rndis_pkt; |
357 | u32 data_offset; | |
fceaf24a | 358 | |
454f18a9 | 359 | /* empty ethernet frame ?? */ |
45e44314 BP |
360 | /* ASSERT(Packet->PageBuffers[0].Length > */ |
361 | /* RNDIS_MESSAGE_SIZE(struct rndis_packet)); */ | |
fceaf24a | 362 | |
a388eb17 | 363 | rndis_pkt = &msg->msg.pkt; |
fceaf24a | 364 | |
0120ee0d GKH |
365 | /* |
366 | * FIXME: Handle multiple rndis pkt msgs that maybe enclosed in this | |
367 | * netvsc packet (ie TotalDataBufferLength != MessageLength) | |
368 | */ | |
fceaf24a | 369 | |
454f18a9 | 370 | /* Remove the rndis header and pass it back up the stack */ |
a388eb17 | 371 | data_offset = RNDIS_HEADER_SIZE + rndis_pkt->data_offset; |
fceaf24a | 372 | |
72a2f5bd HZ |
373 | pkt->total_data_buflen -= data_offset; |
374 | pkt->page_buf[0].Offset += data_offset; | |
375 | pkt->page_buf[0].Length -= data_offset; | |
fceaf24a | 376 | |
72a2f5bd | 377 | pkt->is_data_pkt = true; |
fceaf24a | 378 | |
53d21fdb | 379 | rndis_filter.inner_drv.recv_cb(dev->net_dev->dev, |
c2a4efdd | 380 | pkt); |
fceaf24a HJ |
381 | } |
382 | ||
9c26aa0d | 383 | static int rndis_filter_receive(struct hv_device *dev, |
c2a4efdd | 384 | struct hv_netvsc_packet *pkt) |
fceaf24a | 385 | { |
c2a4efdd HZ |
386 | struct netvsc_device *net_dev = dev->Extension; |
387 | struct rndis_device *rndis_dev; | |
388 | struct rndis_message rndis_msg; | |
389 | struct rndis_message *rndis_hdr; | |
fceaf24a | 390 | |
c2a4efdd | 391 | if (!net_dev) |
8a62d716 BP |
392 | return -EINVAL; |
393 | ||
454f18a9 | 394 | /* Make sure the rndis device state is initialized */ |
53d21fdb | 395 | if (!net_dev->extension) { |
0120ee0d GKH |
396 | DPRINT_ERR(NETVSC, "got rndis message but no rndis device..." |
397 | "dropping this message!"); | |
fceaf24a HJ |
398 | return -1; |
399 | } | |
400 | ||
53d21fdb | 401 | rndis_dev = (struct rndis_device *)net_dev->extension; |
c2a4efdd | 402 | if (rndis_dev->state == RNDIS_DEV_UNINITIALIZED) { |
0120ee0d GKH |
403 | DPRINT_ERR(NETVSC, "got rndis message but rndis device " |
404 | "uninitialized...dropping this message!"); | |
fceaf24a HJ |
405 | return -1; |
406 | } | |
407 | ||
c2a4efdd | 408 | rndis_hdr = (struct rndis_message *)kmap_atomic( |
72a2f5bd | 409 | pfn_to_page(pkt->page_buf[0].Pfn), KM_IRQ0); |
fceaf24a | 410 | |
c2a4efdd | 411 | rndis_hdr = (void *)((unsigned long)rndis_hdr + |
72a2f5bd | 412 | pkt->page_buf[0].Offset); |
fceaf24a | 413 | |
454f18a9 | 414 | /* Make sure we got a valid rndis message */ |
0120ee0d GKH |
415 | /* |
416 | * FIXME: There seems to be a bug in set completion msg where its | |
417 | * MessageLength is 16 bytes but the ByteCount field in the xfer page | |
418 | * range shows 52 bytes | |
419 | * */ | |
fceaf24a | 420 | #if 0 |
a388eb17 | 421 | if (pkt->total_data_buflen != rndis_hdr->msg_len) { |
72a2f5bd | 422 | kunmap_atomic(rndis_hdr - pkt->page_buf[0].Offset, |
0120ee0d GKH |
423 | KM_IRQ0); |
424 | ||
425 | DPRINT_ERR(NETVSC, "invalid rndis message? (expected %u " | |
426 | "bytes got %u)...dropping this message!", | |
a388eb17 | 427 | rndis_hdr->msg_len, |
72a2f5bd | 428 | pkt->total_data_buflen); |
fceaf24a HJ |
429 | return -1; |
430 | } | |
431 | #endif | |
432 | ||
a388eb17 HZ |
433 | if ((rndis_hdr->ndis_msg_type != REMOTE_NDIS_PACKET_MSG) && |
434 | (rndis_hdr->msg_len > sizeof(struct rndis_message))) { | |
0120ee0d GKH |
435 | DPRINT_ERR(NETVSC, "incoming rndis message buffer overflow " |
436 | "detected (got %u, max %zu)...marking it an error!", | |
a388eb17 | 437 | rndis_hdr->msg_len, |
0120ee0d | 438 | sizeof(struct rndis_message)); |
fceaf24a HJ |
439 | } |
440 | ||
c2a4efdd | 441 | memcpy(&rndis_msg, rndis_hdr, |
a388eb17 | 442 | (rndis_hdr->msg_len > sizeof(struct rndis_message)) ? |
0120ee0d | 443 | sizeof(struct rndis_message) : |
a388eb17 | 444 | rndis_hdr->msg_len); |
fceaf24a | 445 | |
72a2f5bd | 446 | kunmap_atomic(rndis_hdr - pkt->page_buf[0].Offset, KM_IRQ0); |
fceaf24a | 447 | |
9c26aa0d | 448 | dump_rndis_message(&rndis_msg); |
fceaf24a | 449 | |
a388eb17 | 450 | switch (rndis_msg.ndis_msg_type) { |
fceaf24a | 451 | case REMOTE_NDIS_PACKET_MSG: |
0120ee0d | 452 | /* data msg */ |
9c26aa0d | 453 | rndis_filter_receive_data(rndis_dev, &rndis_msg, pkt); |
fceaf24a HJ |
454 | break; |
455 | ||
fceaf24a HJ |
456 | case REMOTE_NDIS_INITIALIZE_CMPLT: |
457 | case REMOTE_NDIS_QUERY_CMPLT: | |
458 | case REMOTE_NDIS_SET_CMPLT: | |
454f18a9 BP |
459 | /* case REMOTE_NDIS_RESET_CMPLT: */ |
460 | /* case REMOTE_NDIS_KEEPALIVE_CMPLT: */ | |
0120ee0d | 461 | /* completion msgs */ |
9c26aa0d | 462 | rndis_filter_receive_response(rndis_dev, &rndis_msg); |
fceaf24a HJ |
463 | break; |
464 | ||
fceaf24a | 465 | case REMOTE_NDIS_INDICATE_STATUS_MSG: |
0120ee0d | 466 | /* notification msgs */ |
9c26aa0d | 467 | rndis_filter_receive_indicate_status(rndis_dev, &rndis_msg); |
fceaf24a HJ |
468 | break; |
469 | default: | |
0120ee0d | 470 | DPRINT_ERR(NETVSC, "unhandled rndis message (type %u len %u)", |
a388eb17 HZ |
471 | rndis_msg.ndis_msg_type, |
472 | rndis_msg.msg_len); | |
fceaf24a HJ |
473 | break; |
474 | } | |
475 | ||
fceaf24a HJ |
476 | return 0; |
477 | } | |
478 | ||
9c26aa0d | 479 | static int rndis_filter_query_device(struct rndis_device *dev, u32 oid, |
c2a4efdd | 480 | void *result, u32 *result_size) |
fceaf24a | 481 | { |
e681b954 | 482 | struct rndis_request *request; |
c2a4efdd | 483 | u32 inresult_size = *result_size; |
9f33d054 | 484 | struct rndis_query_request *query; |
c2a4efdd | 485 | struct rndis_query_complete *query_complete; |
0120ee0d | 486 | int ret = 0; |
fceaf24a | 487 | |
c2a4efdd | 488 | if (!result) |
8a62d716 | 489 | return -EINVAL; |
fceaf24a | 490 | |
c2a4efdd | 491 | *result_size = 0; |
9c26aa0d | 492 | request = get_rndis_request(dev, REMOTE_NDIS_QUERY_MSG, |
0120ee0d GKH |
493 | RNDIS_MESSAGE_SIZE(struct rndis_query_request)); |
494 | if (!request) { | |
fceaf24a HJ |
495 | ret = -1; |
496 | goto Cleanup; | |
497 | } | |
498 | ||
454f18a9 | 499 | /* Setup the rndis query */ |
a388eb17 HZ |
500 | query = &request->request_msg.msg.query_req; |
501 | query->oid = oid; | |
502 | query->info_buf_offset = sizeof(struct rndis_query_request); | |
503 | query->info_buflen = 0; | |
504 | query->dev_vc_handle = 0; | |
fceaf24a | 505 | |
9c26aa0d | 506 | ret = rndis_filter_send_request(dev, request); |
fceaf24a | 507 | if (ret != 0) |
fceaf24a | 508 | goto Cleanup; |
fceaf24a | 509 | |
c2a4efdd | 510 | osd_waitevent_wait(request->waitevent); |
fceaf24a | 511 | |
454f18a9 | 512 | /* Copy the response back */ |
a388eb17 | 513 | query_complete = &request->response_msg.msg.query_complete; |
fceaf24a | 514 | |
a388eb17 | 515 | if (query_complete->info_buflen > inresult_size) { |
fceaf24a HJ |
516 | ret = -1; |
517 | goto Cleanup; | |
518 | } | |
519 | ||
c2a4efdd HZ |
520 | memcpy(result, |
521 | (void *)((unsigned long)query_complete + | |
a388eb17 HZ |
522 | query_complete->info_buf_offset), |
523 | query_complete->info_buflen); | |
fceaf24a | 524 | |
a388eb17 | 525 | *result_size = query_complete->info_buflen; |
fceaf24a HJ |
526 | |
527 | Cleanup: | |
528 | if (request) | |
9c26aa0d | 529 | put_rndis_request(dev, request); |
fceaf24a HJ |
530 | |
531 | return ret; | |
532 | } | |
533 | ||
9c26aa0d | 534 | static int rndis_filter_query_device_mac(struct rndis_device *dev) |
fceaf24a | 535 | { |
9f8bd8ba | 536 | u32 size = ETH_ALEN; |
fceaf24a | 537 | |
9c26aa0d | 538 | return rndis_filter_query_device(dev, |
0120ee0d | 539 | RNDIS_OID_802_3_PERMANENT_ADDRESS, |
c2a4efdd | 540 | dev->hw_mac_adr, &size); |
fceaf24a HJ |
541 | } |
542 | ||
9c26aa0d | 543 | static int rndis_filter_query_device_link_status(struct rndis_device *dev) |
fceaf24a | 544 | { |
0120ee0d | 545 | u32 size = sizeof(u32); |
fceaf24a | 546 | |
9c26aa0d | 547 | return rndis_filter_query_device(dev, |
0120ee0d | 548 | RNDIS_OID_GEN_MEDIA_CONNECT_STATUS, |
c2a4efdd | 549 | &dev->link_stat, &size); |
fceaf24a HJ |
550 | } |
551 | ||
9c26aa0d | 552 | static int rndis_filter_set_packet_filter(struct rndis_device *dev, |
c2a4efdd | 553 | u32 new_filter) |
fceaf24a | 554 | { |
e681b954 | 555 | struct rndis_request *request; |
9f33d054 | 556 | struct rndis_set_request *set; |
c2a4efdd | 557 | struct rndis_set_complete *set_complete; |
4d643114 | 558 | u32 status; |
fceaf24a HJ |
559 | int ret; |
560 | ||
45e44314 BP |
561 | /* ASSERT(RNDIS_MESSAGE_SIZE(struct rndis_set_request) + sizeof(u32) <= */ |
562 | /* sizeof(struct rndis_message)); */ | |
fceaf24a | 563 | |
9c26aa0d | 564 | request = get_rndis_request(dev, REMOTE_NDIS_SET_MSG, |
0120ee0d GKH |
565 | RNDIS_MESSAGE_SIZE(struct rndis_set_request) + |
566 | sizeof(u32)); | |
567 | if (!request) { | |
fceaf24a HJ |
568 | ret = -1; |
569 | goto Cleanup; | |
570 | } | |
571 | ||
454f18a9 | 572 | /* Setup the rndis set */ |
a388eb17 HZ |
573 | set = &request->request_msg.msg.set_req; |
574 | set->oid = RNDIS_OID_GEN_CURRENT_PACKET_FILTER; | |
575 | set->info_buflen = sizeof(u32); | |
576 | set->info_buf_offset = sizeof(struct rndis_set_request); | |
fceaf24a | 577 | |
0120ee0d | 578 | memcpy((void *)(unsigned long)set + sizeof(struct rndis_set_request), |
c2a4efdd | 579 | &new_filter, sizeof(u32)); |
fceaf24a | 580 | |
9c26aa0d | 581 | ret = rndis_filter_send_request(dev, request); |
fceaf24a | 582 | if (ret != 0) |
fceaf24a | 583 | goto Cleanup; |
fceaf24a | 584 | |
c2a4efdd | 585 | ret = osd_waitevent_waitex(request->waitevent, 2000/*2sec*/); |
0120ee0d | 586 | if (!ret) { |
fceaf24a HJ |
587 | ret = -1; |
588 | DPRINT_ERR(NETVSC, "timeout before we got a set response..."); | |
0120ee0d GKH |
589 | /* |
590 | * We cant deallocate the request since we may still receive a | |
591 | * send completion for it. | |
592 | */ | |
fceaf24a | 593 | goto Exit; |
0120ee0d | 594 | } else { |
fceaf24a | 595 | if (ret > 0) |
fceaf24a | 596 | ret = 0; |
a388eb17 HZ |
597 | set_complete = &request->response_msg.msg.set_complete; |
598 | status = set_complete->status; | |
fceaf24a HJ |
599 | } |
600 | ||
601 | Cleanup: | |
602 | if (request) | |
9c26aa0d | 603 | put_rndis_request(dev, request); |
fceaf24a | 604 | Exit: |
fceaf24a HJ |
605 | return ret; |
606 | } | |
607 | ||
9c26aa0d | 608 | int rndis_filter_init(struct netvsc_driver *drv) |
fceaf24a | 609 | { |
0120ee0d GKH |
610 | DPRINT_DBG(NETVSC, "sizeof(struct rndis_filter_packet) == %zd", |
611 | sizeof(struct rndis_filter_packet)); | |
fceaf24a | 612 | |
72a2f5bd | 613 | drv->req_ext_size = sizeof(struct rndis_filter_packet); |
fceaf24a | 614 | |
454f18a9 | 615 | /* Driver->Context = rndisDriver; */ |
fceaf24a | 616 | |
c2a4efdd | 617 | memset(&rndis_filter, 0, sizeof(struct rndis_filter_driver_object)); |
fceaf24a HJ |
618 | |
619 | /*rndisDriver->Driver = Driver; | |
620 | ||
621 | ASSERT(Driver->OnLinkStatusChanged); | |
622 | rndisDriver->OnLinkStatusChanged = Driver->OnLinkStatusChanged;*/ | |
623 | ||
454f18a9 | 624 | /* Save the original dispatch handlers before we override it */ |
72a2f5bd HZ |
625 | rndis_filter.inner_drv.base.OnDeviceAdd = drv->base.OnDeviceAdd; |
626 | rndis_filter.inner_drv.base.OnDeviceRemove = | |
627 | drv->base.OnDeviceRemove; | |
628 | rndis_filter.inner_drv.base.OnCleanup = drv->base.OnCleanup; | |
fceaf24a | 629 | |
45e44314 BP |
630 | /* ASSERT(Driver->OnSend); */ |
631 | /* ASSERT(Driver->OnReceiveCallback); */ | |
72a2f5bd HZ |
632 | rndis_filter.inner_drv.send = drv->send; |
633 | rndis_filter.inner_drv.recv_cb = drv->recv_cb; | |
634 | rndis_filter.inner_drv.link_status_change = | |
635 | drv->link_status_change; | |
fceaf24a | 636 | |
454f18a9 | 637 | /* Override */ |
72a2f5bd HZ |
638 | drv->base.OnDeviceAdd = rndis_filte_device_add; |
639 | drv->base.OnDeviceRemove = rndis_filter_device_remove; | |
640 | drv->base.OnCleanup = rndis_filter_cleanup; | |
641 | drv->send = rndis_filter_send; | |
454f18a9 | 642 | /* Driver->QueryLinkStatus = RndisFilterQueryDeviceLinkStatus; */ |
72a2f5bd | 643 | drv->recv_cb = rndis_filter_receive; |
fceaf24a | 644 | |
fceaf24a HJ |
645 | return 0; |
646 | } | |
647 | ||
9c26aa0d | 648 | static int rndis_filter_init_device(struct rndis_device *dev) |
fceaf24a | 649 | { |
e681b954 | 650 | struct rndis_request *request; |
9f33d054 | 651 | struct rndis_initialize_request *init; |
c2a4efdd | 652 | struct rndis_initialize_complete *init_complete; |
4d643114 | 653 | u32 status; |
fceaf24a HJ |
654 | int ret; |
655 | ||
9c26aa0d | 656 | request = get_rndis_request(dev, REMOTE_NDIS_INITIALIZE_MSG, |
0120ee0d GKH |
657 | RNDIS_MESSAGE_SIZE(struct rndis_initialize_request)); |
658 | if (!request) { | |
fceaf24a HJ |
659 | ret = -1; |
660 | goto Cleanup; | |
661 | } | |
662 | ||
454f18a9 | 663 | /* Setup the rndis set */ |
a388eb17 HZ |
664 | init = &request->request_msg.msg.init_req; |
665 | init->major_ver = RNDIS_MAJOR_VERSION; | |
666 | init->minor_ver = RNDIS_MINOR_VERSION; | |
0120ee0d | 667 | /* FIXME: Use 1536 - rounded ethernet frame size */ |
a388eb17 | 668 | init->max_xfer_size = 2048; |
fceaf24a | 669 | |
c2a4efdd | 670 | dev->state = RNDIS_DEV_INITIALIZING; |
fceaf24a | 671 | |
9c26aa0d | 672 | ret = rndis_filter_send_request(dev, request); |
0120ee0d | 673 | if (ret != 0) { |
c2a4efdd | 674 | dev->state = RNDIS_DEV_UNINITIALIZED; |
fceaf24a HJ |
675 | goto Cleanup; |
676 | } | |
677 | ||
c2a4efdd | 678 | osd_waitevent_wait(request->waitevent); |
fceaf24a | 679 | |
a388eb17 HZ |
680 | init_complete = &request->response_msg.msg.init_complete; |
681 | status = init_complete->status; | |
0120ee0d | 682 | if (status == RNDIS_STATUS_SUCCESS) { |
c2a4efdd | 683 | dev->state = RNDIS_DEV_INITIALIZED; |
fceaf24a | 684 | ret = 0; |
0120ee0d | 685 | } else { |
c2a4efdd | 686 | dev->state = RNDIS_DEV_UNINITIALIZED; |
fceaf24a HJ |
687 | ret = -1; |
688 | } | |
689 | ||
690 | Cleanup: | |
691 | if (request) | |
9c26aa0d | 692 | put_rndis_request(dev, request); |
fceaf24a HJ |
693 | |
694 | return ret; | |
695 | } | |
696 | ||
9c26aa0d | 697 | static void rndis_filter_halt_device(struct rndis_device *dev) |
fceaf24a | 698 | { |
e681b954 | 699 | struct rndis_request *request; |
9f33d054 | 700 | struct rndis_halt_request *halt; |
fceaf24a | 701 | |
454f18a9 | 702 | /* Attempt to do a rndis device halt */ |
9c26aa0d | 703 | request = get_rndis_request(dev, REMOTE_NDIS_HALT_MSG, |
0120ee0d | 704 | RNDIS_MESSAGE_SIZE(struct rndis_halt_request)); |
fceaf24a | 705 | if (!request) |
fceaf24a | 706 | goto Cleanup; |
fceaf24a | 707 | |
454f18a9 | 708 | /* Setup the rndis set */ |
a388eb17 HZ |
709 | halt = &request->request_msg.msg.halt_req; |
710 | halt->req_id = atomic_inc_return(&dev->new_req_id); | |
fceaf24a | 711 | |
454f18a9 | 712 | /* Ignore return since this msg is optional. */ |
9c26aa0d | 713 | rndis_filter_send_request(dev, request); |
fceaf24a | 714 | |
c2a4efdd | 715 | dev->state = RNDIS_DEV_UNINITIALIZED; |
fceaf24a HJ |
716 | |
717 | Cleanup: | |
718 | if (request) | |
9c26aa0d | 719 | put_rndis_request(dev, request); |
fceaf24a HJ |
720 | return; |
721 | } | |
722 | ||
9c26aa0d | 723 | static int rndis_filter_open_device(struct rndis_device *dev) |
fceaf24a | 724 | { |
0120ee0d | 725 | int ret; |
fceaf24a | 726 | |
c2a4efdd | 727 | if (dev->state != RNDIS_DEV_INITIALIZED) |
fceaf24a HJ |
728 | return 0; |
729 | ||
9c26aa0d | 730 | ret = rndis_filter_set_packet_filter(dev, |
0120ee0d | 731 | NDIS_PACKET_TYPE_BROADCAST | |
95beae90 | 732 | NDIS_PACKET_TYPE_ALL_MULTICAST | |
0120ee0d | 733 | NDIS_PACKET_TYPE_DIRECTED); |
fceaf24a | 734 | if (ret == 0) |
c2a4efdd | 735 | dev->state = RNDIS_DEV_DATAINITIALIZED; |
fceaf24a | 736 | |
fceaf24a HJ |
737 | return ret; |
738 | } | |
739 | ||
9c26aa0d | 740 | static int rndis_filter_close_device(struct rndis_device *dev) |
fceaf24a HJ |
741 | { |
742 | int ret; | |
743 | ||
c2a4efdd | 744 | if (dev->state != RNDIS_DEV_DATAINITIALIZED) |
fceaf24a HJ |
745 | return 0; |
746 | ||
9c26aa0d | 747 | ret = rndis_filter_set_packet_filter(dev, 0); |
fceaf24a | 748 | if (ret == 0) |
c2a4efdd | 749 | dev->state = RNDIS_DEV_INITIALIZED; |
fceaf24a | 750 | |
fceaf24a HJ |
751 | return ret; |
752 | } | |
753 | ||
9c26aa0d | 754 | static int rndis_filte_device_add(struct hv_device *dev, |
c2a4efdd | 755 | void *additional_info) |
fceaf24a HJ |
756 | { |
757 | int ret; | |
ce9ea4cf | 758 | struct netvsc_device *netDevice; |
e681b954 | 759 | struct rndis_device *rndisDevice; |
c2a4efdd | 760 | struct netvsc_device_info *deviceInfo = additional_info; |
fceaf24a | 761 | |
9c26aa0d | 762 | rndisDevice = get_rndis_device(); |
83c720ea | 763 | if (!rndisDevice) |
fceaf24a | 764 | return -1; |
fceaf24a HJ |
765 | |
766 | DPRINT_DBG(NETVSC, "rndis device object allocated - %p", rndisDevice); | |
767 | ||
0120ee0d GKH |
768 | /* |
769 | * Let the inner driver handle this first to create the netvsc channel | |
770 | * NOTE! Once the channel is created, we may get a receive callback | |
771 | * (RndisFilterOnReceive()) before this call is completed | |
772 | */ | |
72a2f5bd | 773 | ret = rndis_filter.inner_drv.base.OnDeviceAdd(dev, additional_info); |
0120ee0d GKH |
774 | if (ret != 0) { |
775 | kfree(rndisDevice); | |
fceaf24a HJ |
776 | return ret; |
777 | } | |
778 | ||
454f18a9 BP |
779 | |
780 | /* Initialize the rndis device */ | |
c2a4efdd | 781 | netDevice = dev->Extension; |
45e44314 BP |
782 | /* ASSERT(netDevice); */ |
783 | /* ASSERT(netDevice->Device); */ | |
fceaf24a | 784 | |
53d21fdb | 785 | netDevice->extension = rndisDevice; |
c2a4efdd | 786 | rndisDevice->net_dev = netDevice; |
fceaf24a | 787 | |
454f18a9 | 788 | /* Send the rndis initialization message */ |
9c26aa0d | 789 | ret = rndis_filter_init_device(rndisDevice); |
0120ee0d GKH |
790 | if (ret != 0) { |
791 | /* | |
792 | * TODO: If rndis init failed, we will need to shut down the | |
793 | * channel | |
794 | */ | |
fceaf24a HJ |
795 | } |
796 | ||
454f18a9 | 797 | /* Get the mac address */ |
9c26aa0d | 798 | ret = rndis_filter_query_device_mac(rndisDevice); |
0120ee0d GKH |
799 | if (ret != 0) { |
800 | /* | |
801 | * TODO: shutdown rndis device and the channel | |
802 | */ | |
fceaf24a HJ |
803 | } |
804 | ||
9f8bd8ba | 805 | DPRINT_INFO(NETVSC, "Device 0x%p mac addr %pM", |
c2a4efdd | 806 | rndisDevice, rndisDevice->hw_mac_adr); |
fceaf24a | 807 | |
72a2f5bd | 808 | memcpy(deviceInfo->mac_adr, rndisDevice->hw_mac_adr, ETH_ALEN); |
fceaf24a | 809 | |
9c26aa0d | 810 | rndis_filter_query_device_link_status(rndisDevice); |
fceaf24a | 811 | |
72a2f5bd | 812 | deviceInfo->link_state = rndisDevice->link_stat; |
0120ee0d | 813 | DPRINT_INFO(NETVSC, "Device 0x%p link state %s", rndisDevice, |
72a2f5bd | 814 | ((deviceInfo->link_state) ? ("down") : ("up"))); |
fceaf24a | 815 | |
fceaf24a HJ |
816 | return ret; |
817 | } | |
818 | ||
9c26aa0d | 819 | static int rndis_filter_device_remove(struct hv_device *dev) |
fceaf24a | 820 | { |
c2a4efdd | 821 | struct netvsc_device *net_dev = dev->Extension; |
53d21fdb | 822 | struct rndis_device *rndis_dev = net_dev->extension; |
fceaf24a | 823 | |
454f18a9 | 824 | /* Halt and release the rndis device */ |
9c26aa0d | 825 | rndis_filter_halt_device(rndis_dev); |
fceaf24a | 826 | |
c2a4efdd | 827 | kfree(rndis_dev); |
53d21fdb | 828 | net_dev->extension = NULL; |
fceaf24a | 829 | |
454f18a9 | 830 | /* Pass control to inner driver to remove the device */ |
72a2f5bd | 831 | rndis_filter.inner_drv.base.OnDeviceRemove(dev); |
fceaf24a | 832 | |
fceaf24a HJ |
833 | return 0; |
834 | } | |
835 | ||
9c26aa0d | 836 | static void rndis_filter_cleanup(struct hv_driver *drv) |
fceaf24a | 837 | { |
fceaf24a HJ |
838 | } |
839 | ||
9c26aa0d | 840 | int rndis_filter_open(struct hv_device *dev) |
fceaf24a | 841 | { |
c2a4efdd | 842 | struct netvsc_device *netDevice = dev->Extension; |
fceaf24a | 843 | |
8a62d716 BP |
844 | if (!netDevice) |
845 | return -EINVAL; | |
846 | ||
53d21fdb | 847 | return rndis_filter_open_device(netDevice->extension); |
fceaf24a HJ |
848 | } |
849 | ||
9c26aa0d | 850 | int rndis_filter_close(struct hv_device *dev) |
fceaf24a | 851 | { |
c2a4efdd | 852 | struct netvsc_device *netDevice = dev->Extension; |
fceaf24a | 853 | |
8a62d716 BP |
854 | if (!netDevice) |
855 | return -EINVAL; | |
856 | ||
53d21fdb | 857 | return rndis_filter_close_device(netDevice->extension); |
fceaf24a HJ |
858 | } |
859 | ||
9c26aa0d | 860 | static int rndis_filter_send(struct hv_device *dev, |
c2a4efdd | 861 | struct hv_netvsc_packet *pkt) |
fceaf24a | 862 | { |
0120ee0d | 863 | int ret; |
e681b954 | 864 | struct rndis_filter_packet *filterPacket; |
9f33d054 GKH |
865 | struct rndis_message *rndisMessage; |
866 | struct rndis_packet *rndisPacket; | |
4d643114 | 867 | u32 rndisMessageSize; |
fceaf24a | 868 | |
454f18a9 | 869 | /* Add the rndis header */ |
72a2f5bd | 870 | filterPacket = (struct rndis_filter_packet *)pkt->extension; |
45e44314 | 871 | /* ASSERT(filterPacket); */ |
fceaf24a | 872 | |
e681b954 | 873 | memset(filterPacket, 0, sizeof(struct rndis_filter_packet)); |
fceaf24a | 874 | |
c2a4efdd | 875 | rndisMessage = &filterPacket->msg; |
9f33d054 | 876 | rndisMessageSize = RNDIS_MESSAGE_SIZE(struct rndis_packet); |
fceaf24a | 877 | |
a388eb17 HZ |
878 | rndisMessage->ndis_msg_type = REMOTE_NDIS_PACKET_MSG; |
879 | rndisMessage->msg_len = pkt->total_data_buflen + | |
0120ee0d | 880 | rndisMessageSize; |
fceaf24a | 881 | |
a388eb17 HZ |
882 | rndisPacket = &rndisMessage->msg.pkt; |
883 | rndisPacket->data_offset = sizeof(struct rndis_packet); | |
884 | rndisPacket->data_len = pkt->total_data_buflen; | |
fceaf24a | 885 | |
72a2f5bd HZ |
886 | pkt->is_data_pkt = true; |
887 | pkt->page_buf[0].Pfn = virt_to_phys(rndisMessage) >> PAGE_SHIFT; | |
888 | pkt->page_buf[0].Offset = | |
0120ee0d | 889 | (unsigned long)rndisMessage & (PAGE_SIZE-1); |
72a2f5bd | 890 | pkt->page_buf[0].Length = rndisMessageSize; |
fceaf24a | 891 | |
454f18a9 | 892 | /* Save the packet send completion and context */ |
72a2f5bd | 893 | filterPacket->completion = pkt->completion.send.send_completion; |
c2a4efdd | 894 | filterPacket->completion_ctx = |
72a2f5bd | 895 | pkt->completion.send.send_completion_ctx; |
fceaf24a | 896 | |
454f18a9 | 897 | /* Use ours */ |
72a2f5bd HZ |
898 | pkt->completion.send.send_completion = rndis_filter_send_completion; |
899 | pkt->completion.send.send_completion_ctx = filterPacket; | |
fceaf24a | 900 | |
72a2f5bd | 901 | ret = rndis_filter.inner_drv.send(dev, pkt); |
0120ee0d GKH |
902 | if (ret != 0) { |
903 | /* | |
904 | * Reset the completion to originals to allow retries from | |
905 | * above | |
906 | */ | |
72a2f5bd | 907 | pkt->completion.send.send_completion = |
c2a4efdd | 908 | filterPacket->completion; |
72a2f5bd | 909 | pkt->completion.send.send_completion_ctx = |
c2a4efdd | 910 | filterPacket->completion_ctx; |
fceaf24a HJ |
911 | } |
912 | ||
fceaf24a HJ |
913 | return ret; |
914 | } | |
915 | ||
9c26aa0d | 916 | static void rndis_filter_send_completion(void *ctx) |
fceaf24a | 917 | { |
c2a4efdd | 918 | struct rndis_filter_packet *filterPacket = ctx; |
fceaf24a | 919 | |
454f18a9 | 920 | /* Pass it back to the original handler */ |
c2a4efdd | 921 | filterPacket->completion(filterPacket->completion_ctx); |
fceaf24a HJ |
922 | } |
923 | ||
924 | ||
9c26aa0d | 925 | static void rndis_filter_send_request_completion(void *ctx) |
fceaf24a | 926 | { |
454f18a9 | 927 | /* Noop */ |
fceaf24a | 928 | } |