Commit | Line | Data |
---|---|---|
fceaf24a HJ |
1 | /* |
2 | * | |
3 | * Copyright (c) 2009, Microsoft Corporation. | |
4 | * | |
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. | |
8 | * | |
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 | |
12 | * more details. | |
13 | * | |
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. | |
17 | * | |
18 | * Authors: | |
19 | * Hank Janssen <hjanssen@microsoft.com> | |
20 | * | |
21 | */ | |
22 | ||
c86f3e2a | 23 | #define KERNEL_2_6_27 |
fceaf24a | 24 | |
c86f3e2a | 25 | #include "include/logging.h" |
fceaf24a HJ |
26 | #include "NetVsc.h" |
27 | #include "RndisFilter.h" | |
28 | ||
29 | ||
30 | // | |
31 | // Globals | |
32 | // | |
33 | static const char* gDriverName="netvsc"; | |
34 | ||
35 | // {F8615163-DF3E-46c5-913F-F2D2F965ED0E} | |
36 | static const GUID gNetVscDeviceType={ | |
37 | .Data = {0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E} | |
38 | }; | |
39 | ||
40 | ||
41 | // | |
42 | // Internal routines | |
43 | // | |
44 | static int | |
45 | NetVscOnDeviceAdd( | |
46 | DEVICE_OBJECT *Device, | |
47 | void *AdditionalInfo | |
48 | ); | |
49 | ||
50 | static int | |
51 | NetVscOnDeviceRemove( | |
52 | DEVICE_OBJECT *Device | |
53 | ); | |
54 | ||
55 | static void | |
56 | NetVscOnCleanup( | |
57 | DRIVER_OBJECT *Driver | |
58 | ); | |
59 | ||
60 | static void | |
61 | NetVscOnChannelCallback( | |
8282c400 | 62 | void * context |
fceaf24a HJ |
63 | ); |
64 | ||
65 | static int | |
66 | NetVscInitializeSendBufferWithNetVsp( | |
67 | DEVICE_OBJECT *Device | |
68 | ); | |
69 | ||
70 | static int | |
71 | NetVscInitializeReceiveBufferWithNetVsp( | |
72 | DEVICE_OBJECT *Device | |
73 | ); | |
74 | ||
75 | static int | |
76 | NetVscDestroySendBuffer( | |
77 | NETVSC_DEVICE *NetDevice | |
78 | ); | |
79 | ||
80 | static int | |
81 | NetVscDestroyReceiveBuffer( | |
82 | NETVSC_DEVICE *NetDevice | |
83 | ); | |
84 | ||
85 | static int | |
86 | NetVscConnectToVsp( | |
87 | DEVICE_OBJECT *Device | |
88 | ); | |
89 | ||
90 | static void | |
91 | NetVscOnSendCompletion( | |
92 | DEVICE_OBJECT *Device, | |
93 | VMPACKET_DESCRIPTOR *Packet | |
94 | ); | |
95 | ||
96 | static int | |
97 | NetVscOnSend( | |
98 | DEVICE_OBJECT *Device, | |
99 | NETVSC_PACKET *Packet | |
100 | ); | |
101 | ||
102 | static void | |
103 | NetVscOnReceive( | |
104 | DEVICE_OBJECT *Device, | |
105 | VMPACKET_DESCRIPTOR *Packet | |
106 | ); | |
107 | ||
108 | static void | |
109 | NetVscOnReceiveCompletion( | |
8282c400 | 110 | void * Context |
fceaf24a HJ |
111 | ); |
112 | ||
113 | static void | |
114 | NetVscSendReceiveCompletion( | |
115 | DEVICE_OBJECT *Device, | |
116 | UINT64 TransactionId | |
117 | ); | |
118 | ||
119 | static inline NETVSC_DEVICE* AllocNetDevice(DEVICE_OBJECT *Device) | |
120 | { | |
121 | NETVSC_DEVICE *netDevice; | |
122 | ||
123 | netDevice = MemAllocZeroed(sizeof(NETVSC_DEVICE)); | |
124 | if (!netDevice) | |
125 | return NULL; | |
126 | ||
127 | // Set to 2 to allow both inbound and outbound traffic | |
128 | InterlockedCompareExchange(&netDevice->RefCount, 2, 0); | |
129 | ||
130 | netDevice->Device = Device; | |
131 | Device->Extension = netDevice; | |
132 | ||
133 | return netDevice; | |
134 | } | |
135 | ||
136 | static inline void FreeNetDevice(NETVSC_DEVICE *Device) | |
137 | { | |
138 | ASSERT(Device->RefCount == 0); | |
139 | Device->Device->Extension = NULL; | |
140 | MemFree(Device); | |
141 | } | |
142 | ||
143 | ||
144 | // Get the net device object iff exists and its refcount > 1 | |
145 | static inline NETVSC_DEVICE* GetOutboundNetDevice(DEVICE_OBJECT *Device) | |
146 | { | |
147 | NETVSC_DEVICE *netDevice; | |
148 | ||
149 | netDevice = (NETVSC_DEVICE*)Device->Extension; | |
150 | if (netDevice && netDevice->RefCount > 1) | |
151 | { | |
152 | InterlockedIncrement(&netDevice->RefCount); | |
153 | } | |
154 | else | |
155 | { | |
156 | netDevice = NULL; | |
157 | } | |
158 | ||
159 | return netDevice; | |
160 | } | |
161 | ||
162 | // Get the net device object iff exists and its refcount > 0 | |
163 | static inline NETVSC_DEVICE* GetInboundNetDevice(DEVICE_OBJECT *Device) | |
164 | { | |
165 | NETVSC_DEVICE *netDevice; | |
166 | ||
167 | netDevice = (NETVSC_DEVICE*)Device->Extension; | |
168 | if (netDevice && netDevice->RefCount) | |
169 | { | |
170 | InterlockedIncrement(&netDevice->RefCount); | |
171 | } | |
172 | else | |
173 | { | |
174 | netDevice = NULL; | |
175 | } | |
176 | ||
177 | return netDevice; | |
178 | } | |
179 | ||
180 | static inline void PutNetDevice(DEVICE_OBJECT *Device) | |
181 | { | |
182 | NETVSC_DEVICE *netDevice; | |
183 | ||
184 | netDevice = (NETVSC_DEVICE*)Device->Extension; | |
185 | ASSERT(netDevice); | |
186 | ||
187 | InterlockedDecrement(&netDevice->RefCount); | |
188 | } | |
189 | ||
190 | static inline NETVSC_DEVICE* ReleaseOutboundNetDevice(DEVICE_OBJECT *Device) | |
191 | { | |
192 | NETVSC_DEVICE *netDevice; | |
193 | ||
194 | netDevice = (NETVSC_DEVICE*)Device->Extension; | |
195 | if (netDevice == NULL) | |
196 | return NULL; | |
197 | ||
198 | // Busy wait until the ref drop to 2, then set it to 1 | |
199 | while (InterlockedCompareExchange(&netDevice->RefCount, 1, 2) != 2) | |
200 | { | |
201 | Sleep(100); | |
202 | } | |
203 | ||
204 | return netDevice; | |
205 | } | |
206 | ||
207 | static inline NETVSC_DEVICE* ReleaseInboundNetDevice(DEVICE_OBJECT *Device) | |
208 | { | |
209 | NETVSC_DEVICE *netDevice; | |
210 | ||
211 | netDevice = (NETVSC_DEVICE*)Device->Extension; | |
212 | if (netDevice == NULL) | |
213 | return NULL; | |
214 | ||
215 | // Busy wait until the ref drop to 1, then set it to 0 | |
216 | while (InterlockedCompareExchange(&netDevice->RefCount, 0, 1) != 1) | |
217 | { | |
218 | Sleep(100); | |
219 | } | |
220 | ||
221 | Device->Extension = NULL; | |
222 | return netDevice; | |
223 | } | |
224 | ||
225 | /*++; | |
226 | ||
227 | ||
228 | Name: | |
229 | NetVscInitialize() | |
230 | ||
231 | Description: | |
232 | Main entry point | |
233 | ||
234 | --*/ | |
235 | int | |
236 | NetVscInitialize( | |
237 | DRIVER_OBJECT *drv | |
238 | ) | |
239 | { | |
240 | NETVSC_DRIVER_OBJECT* driver = (NETVSC_DRIVER_OBJECT*)drv; | |
241 | int ret=0; | |
242 | ||
243 | DPRINT_ENTER(NETVSC); | |
244 | ||
245 | DPRINT_DBG(NETVSC, "sizeof(NETVSC_PACKET)=%d, sizeof(NVSP_MESSAGE)=%d, sizeof(VMTRANSFER_PAGE_PACKET_HEADER)=%d", | |
246 | sizeof(NETVSC_PACKET), sizeof(NVSP_MESSAGE), sizeof(VMTRANSFER_PAGE_PACKET_HEADER)); | |
247 | ||
248 | // Make sure we are at least 2 pages since 1 page is used for control | |
249 | ASSERT(driver->RingBufferSize >= (PAGE_SIZE << 1)); | |
250 | ||
251 | drv->name = gDriverName; | |
252 | memcpy(&drv->deviceType, &gNetVscDeviceType, sizeof(GUID)); | |
253 | ||
254 | // Make sure it is set by the caller | |
255 | ASSERT(driver->OnReceiveCallback); | |
256 | ASSERT(driver->OnLinkStatusChanged); | |
257 | ||
258 | // Setup the dispatch table | |
259 | driver->Base.OnDeviceAdd = NetVscOnDeviceAdd; | |
260 | driver->Base.OnDeviceRemove = NetVscOnDeviceRemove; | |
261 | driver->Base.OnCleanup = NetVscOnCleanup; | |
262 | ||
263 | driver->OnSend = NetVscOnSend; | |
264 | ||
265 | RndisFilterInit(driver); | |
266 | ||
267 | DPRINT_EXIT(NETVSC); | |
268 | ||
269 | return ret; | |
270 | } | |
271 | ||
272 | static int | |
273 | NetVscInitializeReceiveBufferWithNetVsp( | |
274 | DEVICE_OBJECT *Device | |
275 | ) | |
276 | { | |
277 | int ret=0; | |
278 | NETVSC_DEVICE *netDevice; | |
279 | NVSP_MESSAGE *initPacket; | |
280 | ||
281 | DPRINT_ENTER(NETVSC); | |
282 | ||
283 | netDevice = GetOutboundNetDevice(Device); | |
284 | if (!netDevice) | |
285 | { | |
286 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
287 | DPRINT_EXIT(NETVSC); | |
288 | return -1; | |
289 | } | |
290 | ASSERT(netDevice->ReceiveBufferSize > 0); | |
291 | ASSERT((netDevice->ReceiveBufferSize & (PAGE_SIZE-1)) == 0); // page-size grandularity | |
292 | ||
293 | netDevice->ReceiveBuffer = PageAlloc(netDevice->ReceiveBufferSize >> PAGE_SHIFT); | |
294 | if (!netDevice->ReceiveBuffer) | |
295 | { | |
296 | DPRINT_ERR(NETVSC, "unable to allocate receive buffer of size %d", netDevice->ReceiveBufferSize); | |
297 | ret = -1; | |
298 | goto Cleanup; | |
299 | } | |
300 | ASSERT(((ULONG_PTR)netDevice->ReceiveBuffer & (PAGE_SIZE-1)) == 0); // page-aligned buffer | |
301 | ||
302 | DPRINT_INFO(NETVSC, "Establishing receive buffer's GPADL..."); | |
303 | ||
304 | // Establish the gpadl handle for this buffer on this channel. | |
305 | // Note: This call uses the vmbus connection rather than the channel to establish | |
306 | // the gpadl handle. | |
307 | ret = Device->Driver->VmbusChannelInterface.EstablishGpadl(Device, | |
308 | netDevice->ReceiveBuffer, | |
309 | netDevice->ReceiveBufferSize, | |
310 | &netDevice->ReceiveBufferGpadlHandle); | |
311 | ||
312 | if (ret != 0) | |
313 | { | |
314 | DPRINT_ERR(NETVSC, "unable to establish receive buffer's gpadl"); | |
315 | goto Cleanup; | |
316 | } | |
317 | ||
318 | //WaitEventWait(ext->ChannelInitEvent); | |
319 | ||
320 | // Notify the NetVsp of the gpadl handle | |
321 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendReceiveBuffer..."); | |
322 | ||
323 | initPacket = &netDevice->ChannelInitPacket; | |
324 | ||
325 | memset(initPacket, 0, sizeof(NVSP_MESSAGE)); | |
326 | ||
327 | initPacket->Header.MessageType = NvspMessage1TypeSendReceiveBuffer; | |
328 | initPacket->Messages.Version1Messages.SendReceiveBuffer.GpadlHandle = netDevice->ReceiveBufferGpadlHandle; | |
329 | initPacket->Messages.Version1Messages.SendReceiveBuffer.Id = NETVSC_RECEIVE_BUFFER_ID; | |
330 | ||
331 | // Send the gpadl notification request | |
332 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
333 | initPacket, | |
334 | sizeof(NVSP_MESSAGE), | |
335 | (ULONG_PTR)initPacket, | |
336 | VmbusPacketTypeDataInBand, | |
337 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
338 | if (ret != 0) | |
339 | { | |
340 | DPRINT_ERR(NETVSC, "unable to send receive buffer's gpadl to netvsp"); | |
341 | goto Cleanup; | |
342 | } | |
343 | ||
344 | WaitEventWait(netDevice->ChannelInitEvent); | |
345 | ||
346 | // Check the response | |
347 | if (initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Status != NvspStatusSuccess) | |
348 | { | |
349 | DPRINT_ERR(NETVSC, | |
350 | "Unable to complete receive buffer initialzation with NetVsp - status %d", | |
351 | initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Status); | |
352 | ret = -1; | |
353 | goto Cleanup; | |
354 | } | |
355 | ||
356 | // Parse the response | |
357 | ASSERT(netDevice->ReceiveSectionCount == 0); | |
358 | ASSERT(netDevice->ReceiveSections == NULL); | |
359 | ||
360 | netDevice->ReceiveSectionCount = initPacket->Messages.Version1Messages.SendReceiveBufferComplete.NumSections; | |
361 | ||
362 | netDevice->ReceiveSections = MemAlloc(netDevice->ReceiveSectionCount * sizeof(NVSP_1_RECEIVE_BUFFER_SECTION)); | |
363 | if (netDevice->ReceiveSections == NULL) | |
364 | { | |
365 | ret = -1; | |
366 | goto Cleanup; | |
367 | } | |
368 | ||
369 | memcpy(netDevice->ReceiveSections, | |
370 | initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Sections, | |
371 | netDevice->ReceiveSectionCount * sizeof(NVSP_1_RECEIVE_BUFFER_SECTION)); | |
372 | ||
373 | DPRINT_INFO(NETVSC, | |
374 | "Receive sections info (count %d, offset %d, endoffset %d, suballoc size %d, num suballocs %d)", | |
375 | netDevice->ReceiveSectionCount, netDevice->ReceiveSections[0].Offset, netDevice->ReceiveSections[0].EndOffset, | |
376 | netDevice->ReceiveSections[0].SubAllocationSize, netDevice->ReceiveSections[0].NumSubAllocations); | |
377 | ||
378 | ||
379 | //For 1st release, there should only be 1 section that represents the entire receive buffer | |
380 | if (netDevice->ReceiveSectionCount != 1 || | |
381 | netDevice->ReceiveSections->Offset != 0 ) | |
382 | { | |
383 | ret = -1; | |
384 | goto Cleanup; | |
385 | } | |
386 | ||
387 | goto Exit; | |
388 | ||
389 | Cleanup: | |
390 | NetVscDestroyReceiveBuffer(netDevice); | |
391 | ||
392 | Exit: | |
393 | PutNetDevice(Device); | |
394 | DPRINT_EXIT(NETVSC); | |
395 | return ret; | |
396 | } | |
397 | ||
398 | ||
399 | static int | |
400 | NetVscInitializeSendBufferWithNetVsp( | |
401 | DEVICE_OBJECT *Device | |
402 | ) | |
403 | { | |
404 | int ret=0; | |
405 | NETVSC_DEVICE *netDevice; | |
406 | NVSP_MESSAGE *initPacket; | |
407 | ||
408 | DPRINT_ENTER(NETVSC); | |
409 | ||
410 | netDevice = GetOutboundNetDevice(Device); | |
411 | if (!netDevice) | |
412 | { | |
413 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
414 | DPRINT_EXIT(NETVSC); | |
415 | return -1; | |
416 | } | |
417 | ASSERT(netDevice->SendBufferSize > 0); | |
418 | ASSERT((netDevice->SendBufferSize & (PAGE_SIZE-1)) == 0); // page-size grandularity | |
419 | ||
420 | netDevice->SendBuffer = PageAlloc(netDevice->SendBufferSize >> PAGE_SHIFT); | |
421 | if (!netDevice->SendBuffer) | |
422 | { | |
423 | DPRINT_ERR(NETVSC, "unable to allocate send buffer of size %d", netDevice->SendBufferSize); | |
424 | ret = -1; | |
425 | goto Cleanup; | |
426 | } | |
427 | ASSERT(((ULONG_PTR)netDevice->SendBuffer & (PAGE_SIZE-1)) == 0); // page-aligned buffer | |
428 | ||
429 | DPRINT_INFO(NETVSC, "Establishing send buffer's GPADL..."); | |
430 | ||
431 | // Establish the gpadl handle for this buffer on this channel. | |
432 | // Note: This call uses the vmbus connection rather than the channel to establish | |
433 | // the gpadl handle. | |
434 | ret = Device->Driver->VmbusChannelInterface.EstablishGpadl(Device, | |
435 | netDevice->SendBuffer, | |
436 | netDevice->SendBufferSize, | |
437 | &netDevice->SendBufferGpadlHandle); | |
438 | ||
439 | if (ret != 0) | |
440 | { | |
441 | DPRINT_ERR(NETVSC, "unable to establish send buffer's gpadl"); | |
442 | goto Cleanup; | |
443 | } | |
444 | ||
445 | //WaitEventWait(ext->ChannelInitEvent); | |
446 | ||
447 | // Notify the NetVsp of the gpadl handle | |
448 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendSendBuffer..."); | |
449 | ||
450 | initPacket = &netDevice->ChannelInitPacket; | |
451 | ||
452 | memset(initPacket, 0, sizeof(NVSP_MESSAGE)); | |
453 | ||
454 | initPacket->Header.MessageType = NvspMessage1TypeSendSendBuffer; | |
455 | initPacket->Messages.Version1Messages.SendReceiveBuffer.GpadlHandle = netDevice->SendBufferGpadlHandle; | |
456 | initPacket->Messages.Version1Messages.SendReceiveBuffer.Id = NETVSC_SEND_BUFFER_ID; | |
457 | ||
458 | // Send the gpadl notification request | |
459 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
460 | initPacket, | |
461 | sizeof(NVSP_MESSAGE), | |
462 | (ULONG_PTR)initPacket, | |
463 | VmbusPacketTypeDataInBand, | |
464 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
465 | if (ret != 0) | |
466 | { | |
467 | DPRINT_ERR(NETVSC, "unable to send receive buffer's gpadl to netvsp"); | |
468 | goto Cleanup; | |
469 | } | |
470 | ||
471 | WaitEventWait(netDevice->ChannelInitEvent); | |
472 | ||
473 | // Check the response | |
474 | if (initPacket->Messages.Version1Messages.SendSendBufferComplete.Status != NvspStatusSuccess) | |
475 | { | |
476 | DPRINT_ERR(NETVSC, | |
477 | "Unable to complete send buffer initialzation with NetVsp - status %d", | |
478 | initPacket->Messages.Version1Messages.SendSendBufferComplete.Status); | |
479 | ret = -1; | |
480 | goto Cleanup; | |
481 | } | |
482 | ||
483 | netDevice->SendSectionSize = initPacket->Messages.Version1Messages.SendSendBufferComplete.SectionSize; | |
484 | ||
485 | goto Exit; | |
486 | ||
487 | Cleanup: | |
488 | NetVscDestroySendBuffer(netDevice); | |
489 | ||
490 | Exit: | |
491 | PutNetDevice(Device); | |
492 | DPRINT_EXIT(NETVSC); | |
493 | return ret; | |
494 | } | |
495 | ||
496 | static int | |
497 | NetVscDestroyReceiveBuffer( | |
498 | NETVSC_DEVICE *NetDevice | |
499 | ) | |
500 | { | |
501 | NVSP_MESSAGE *revokePacket; | |
502 | int ret=0; | |
503 | ||
504 | ||
505 | DPRINT_ENTER(NETVSC); | |
506 | ||
507 | // If we got a section count, it means we received a SendReceiveBufferComplete msg | |
508 | // (ie sent NvspMessage1TypeSendReceiveBuffer msg) therefore, we need to send a revoke msg here | |
509 | if (NetDevice->ReceiveSectionCount) | |
510 | { | |
511 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeRevokeReceiveBuffer..."); | |
512 | ||
513 | // Send the revoke receive buffer | |
514 | revokePacket = &NetDevice->RevokePacket; | |
515 | memset(revokePacket, 0, sizeof(NVSP_MESSAGE)); | |
516 | ||
517 | revokePacket->Header.MessageType = NvspMessage1TypeRevokeReceiveBuffer; | |
518 | revokePacket->Messages.Version1Messages.RevokeReceiveBuffer.Id = NETVSC_RECEIVE_BUFFER_ID; | |
519 | ||
520 | ret = NetDevice->Device->Driver->VmbusChannelInterface.SendPacket(NetDevice->Device, | |
521 | revokePacket, | |
522 | sizeof(NVSP_MESSAGE), | |
523 | (ULONG_PTR)revokePacket, | |
524 | VmbusPacketTypeDataInBand, | |
525 | 0); | |
526 | // If we failed here, we might as well return and have a leak rather than continue and a bugchk | |
527 | if (ret != 0) | |
528 | { | |
529 | DPRINT_ERR(NETVSC, "unable to send revoke receive buffer to netvsp"); | |
530 | DPRINT_EXIT(NETVSC); | |
531 | return -1; | |
532 | } | |
533 | } | |
534 | ||
535 | // Teardown the gpadl on the vsp end | |
536 | if (NetDevice->ReceiveBufferGpadlHandle) | |
537 | { | |
538 | DPRINT_INFO(NETVSC, "Tearing down receive buffer's GPADL..."); | |
539 | ||
540 | ret = NetDevice->Device->Driver->VmbusChannelInterface.TeardownGpadl(NetDevice->Device, | |
541 | NetDevice->ReceiveBufferGpadlHandle); | |
542 | ||
543 | // If we failed here, we might as well return and have a leak rather than continue and a bugchk | |
544 | if (ret != 0) | |
545 | { | |
546 | DPRINT_ERR(NETVSC, "unable to teardown receive buffer's gpadl"); | |
547 | DPRINT_EXIT(NETVSC); | |
548 | return -1; | |
549 | } | |
550 | NetDevice->ReceiveBufferGpadlHandle = 0; | |
551 | } | |
552 | ||
553 | if (NetDevice->ReceiveBuffer) | |
554 | { | |
555 | DPRINT_INFO(NETVSC, "Freeing up receive buffer..."); | |
556 | ||
557 | // Free up the receive buffer | |
558 | PageFree(NetDevice->ReceiveBuffer, NetDevice->ReceiveBufferSize >> PAGE_SHIFT); | |
559 | NetDevice->ReceiveBuffer = NULL; | |
560 | } | |
561 | ||
562 | if (NetDevice->ReceiveSections) | |
563 | { | |
564 | MemFree(NetDevice->ReceiveSections); | |
565 | NetDevice->ReceiveSections = NULL; | |
566 | NetDevice->ReceiveSectionCount = 0; | |
567 | } | |
568 | ||
569 | DPRINT_EXIT(NETVSC); | |
570 | ||
571 | return ret; | |
572 | } | |
573 | ||
574 | ||
575 | ||
576 | ||
577 | static int | |
578 | NetVscDestroySendBuffer( | |
579 | NETVSC_DEVICE *NetDevice | |
580 | ) | |
581 | { | |
582 | NVSP_MESSAGE *revokePacket; | |
583 | int ret=0; | |
584 | ||
585 | ||
586 | DPRINT_ENTER(NETVSC); | |
587 | ||
588 | // If we got a section count, it means we received a SendReceiveBufferComplete msg | |
589 | // (ie sent NvspMessage1TypeSendReceiveBuffer msg) therefore, we need to send a revoke msg here | |
590 | if (NetDevice->SendSectionSize) | |
591 | { | |
592 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeRevokeSendBuffer..."); | |
593 | ||
594 | // Send the revoke send buffer | |
595 | revokePacket = &NetDevice->RevokePacket; | |
596 | memset(revokePacket, 0, sizeof(NVSP_MESSAGE)); | |
597 | ||
598 | revokePacket->Header.MessageType = NvspMessage1TypeRevokeSendBuffer; | |
599 | revokePacket->Messages.Version1Messages.RevokeSendBuffer.Id = NETVSC_SEND_BUFFER_ID; | |
600 | ||
601 | ret = NetDevice->Device->Driver->VmbusChannelInterface.SendPacket(NetDevice->Device, | |
602 | revokePacket, | |
603 | sizeof(NVSP_MESSAGE), | |
604 | (ULONG_PTR)revokePacket, | |
605 | VmbusPacketTypeDataInBand, | |
606 | 0); | |
607 | // If we failed here, we might as well return and have a leak rather than continue and a bugchk | |
608 | if (ret != 0) | |
609 | { | |
610 | DPRINT_ERR(NETVSC, "unable to send revoke send buffer to netvsp"); | |
611 | DPRINT_EXIT(NETVSC); | |
612 | return -1; | |
613 | } | |
614 | } | |
615 | ||
616 | // Teardown the gpadl on the vsp end | |
617 | if (NetDevice->SendBufferGpadlHandle) | |
618 | { | |
619 | DPRINT_INFO(NETVSC, "Tearing down send buffer's GPADL..."); | |
620 | ||
621 | ret = NetDevice->Device->Driver->VmbusChannelInterface.TeardownGpadl(NetDevice->Device, | |
622 | NetDevice->SendBufferGpadlHandle); | |
623 | ||
624 | // If we failed here, we might as well return and have a leak rather than continue and a bugchk | |
625 | if (ret != 0) | |
626 | { | |
627 | DPRINT_ERR(NETVSC, "unable to teardown send buffer's gpadl"); | |
628 | DPRINT_EXIT(NETVSC); | |
629 | return -1; | |
630 | } | |
631 | NetDevice->SendBufferGpadlHandle = 0; | |
632 | } | |
633 | ||
634 | if (NetDevice->SendBuffer) | |
635 | { | |
636 | DPRINT_INFO(NETVSC, "Freeing up send buffer..."); | |
637 | ||
638 | // Free up the receive buffer | |
639 | PageFree(NetDevice->SendBuffer, NetDevice->SendBufferSize >> PAGE_SHIFT); | |
640 | NetDevice->SendBuffer = NULL; | |
641 | } | |
642 | ||
643 | DPRINT_EXIT(NETVSC); | |
644 | ||
645 | return ret; | |
646 | } | |
647 | ||
648 | ||
649 | ||
650 | static int | |
651 | NetVscConnectToVsp( | |
652 | DEVICE_OBJECT *Device | |
653 | ) | |
654 | { | |
655 | int ret=0; | |
656 | NETVSC_DEVICE *netDevice; | |
657 | NVSP_MESSAGE *initPacket; | |
658 | int ndisVersion; | |
659 | ||
660 | DPRINT_ENTER(NETVSC); | |
661 | ||
662 | netDevice = GetOutboundNetDevice(Device); | |
663 | if (!netDevice) | |
664 | { | |
665 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
666 | DPRINT_EXIT(NETVSC); | |
667 | return -1; | |
668 | } | |
669 | ||
670 | initPacket = &netDevice->ChannelInitPacket; | |
671 | ||
672 | memset(initPacket, 0, sizeof(NVSP_MESSAGE)); | |
673 | initPacket->Header.MessageType = NvspMessageTypeInit; | |
674 | initPacket->Messages.InitMessages.Init.MinProtocolVersion = NVSP_MIN_PROTOCOL_VERSION; | |
675 | initPacket->Messages.InitMessages.Init.MaxProtocolVersion = NVSP_MAX_PROTOCOL_VERSION; | |
676 | ||
677 | DPRINT_INFO(NETVSC, "Sending NvspMessageTypeInit..."); | |
678 | ||
679 | // Send the init request | |
680 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
681 | initPacket, | |
682 | sizeof(NVSP_MESSAGE), | |
683 | (ULONG_PTR)initPacket, | |
684 | VmbusPacketTypeDataInBand, | |
685 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
686 | ||
687 | if( ret != 0) | |
688 | { | |
689 | DPRINT_ERR(NETVSC, "unable to send NvspMessageTypeInit"); | |
690 | goto Cleanup; | |
691 | } | |
692 | ||
693 | WaitEventWait(netDevice->ChannelInitEvent); | |
694 | ||
695 | // Now, check the response | |
696 | //ASSERT(initPacket->Messages.InitMessages.InitComplete.MaximumMdlChainLength <= MAX_MULTIPAGE_BUFFER_COUNT); | |
697 | DPRINT_INFO(NETVSC, "NvspMessageTypeInit status(%d) max mdl chain (%d)", | |
698 | initPacket->Messages.InitMessages.InitComplete.Status, | |
699 | initPacket->Messages.InitMessages.InitComplete.MaximumMdlChainLength); | |
700 | ||
701 | if (initPacket->Messages.InitMessages.InitComplete.Status != NvspStatusSuccess) | |
702 | { | |
703 | DPRINT_ERR(NETVSC, "unable to initialize with netvsp (status 0x%x)", initPacket->Messages.InitMessages.InitComplete.Status); | |
704 | ret = -1; | |
705 | goto Cleanup; | |
706 | } | |
707 | ||
708 | if (initPacket->Messages.InitMessages.InitComplete.NegotiatedProtocolVersion != NVSP_PROTOCOL_VERSION_1) | |
709 | { | |
710 | DPRINT_ERR(NETVSC, "unable to initialize with netvsp (version expected 1 got %d)", | |
711 | initPacket->Messages.InitMessages.InitComplete.NegotiatedProtocolVersion); | |
712 | ret = -1; | |
713 | goto Cleanup; | |
714 | } | |
715 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendNdisVersion..."); | |
716 | ||
717 | // Send the ndis version | |
718 | memset(initPacket, 0, sizeof(NVSP_MESSAGE)); | |
719 | ||
720 | ndisVersion = 0x00050000; | |
721 | ||
722 | initPacket->Header.MessageType = NvspMessage1TypeSendNdisVersion; | |
723 | initPacket->Messages.Version1Messages.SendNdisVersion.NdisMajorVersion = (ndisVersion & 0xFFFF0000) >> 16; | |
724 | initPacket->Messages.Version1Messages.SendNdisVersion.NdisMinorVersion = ndisVersion & 0xFFFF; | |
725 | ||
726 | // Send the init request | |
727 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
728 | initPacket, | |
729 | sizeof(NVSP_MESSAGE), | |
730 | (ULONG_PTR)initPacket, | |
731 | VmbusPacketTypeDataInBand, | |
732 | 0); | |
733 | if (ret != 0) | |
734 | { | |
735 | DPRINT_ERR(NETVSC, "unable to send NvspMessage1TypeSendNdisVersion"); | |
736 | ret = -1; | |
737 | goto Cleanup; | |
738 | } | |
739 | // | |
740 | // BUGBUG - We have to wait for the above msg since the netvsp uses KMCL which acknowledges packet (completion packet) | |
741 | // since our Vmbus always set the VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED flag | |
742 | //WaitEventWait(NetVscChannel->ChannelInitEvent); | |
743 | ||
744 | // Post the big receive buffer to NetVSP | |
745 | ret = NetVscInitializeReceiveBufferWithNetVsp(Device); | |
746 | if (ret == 0) | |
747 | { | |
748 | ret = NetVscInitializeSendBufferWithNetVsp(Device); | |
749 | } | |
750 | ||
751 | Cleanup: | |
752 | PutNetDevice(Device); | |
753 | DPRINT_EXIT(NETVSC); | |
754 | return ret; | |
755 | } | |
756 | ||
757 | static void | |
758 | NetVscDisconnectFromVsp( | |
759 | NETVSC_DEVICE *NetDevice | |
760 | ) | |
761 | { | |
762 | DPRINT_ENTER(NETVSC); | |
763 | ||
764 | NetVscDestroyReceiveBuffer(NetDevice); | |
765 | NetVscDestroySendBuffer(NetDevice); | |
766 | ||
767 | DPRINT_EXIT(NETVSC); | |
768 | } | |
769 | ||
770 | ||
771 | /*++ | |
772 | ||
773 | Name: | |
774 | NetVscOnDeviceAdd() | |
775 | ||
776 | Description: | |
777 | Callback when the device belonging to this driver is added | |
778 | ||
779 | --*/ | |
780 | int | |
781 | NetVscOnDeviceAdd( | |
782 | DEVICE_OBJECT *Device, | |
783 | void *AdditionalInfo | |
784 | ) | |
785 | { | |
786 | int ret=0; | |
787 | int i; | |
788 | ||
789 | NETVSC_DEVICE* netDevice; | |
790 | NETVSC_PACKET* packet; | |
791 | LIST_ENTRY *entry; | |
792 | ||
793 | NETVSC_DRIVER_OBJECT *netDriver = (NETVSC_DRIVER_OBJECT*) Device->Driver;; | |
794 | ||
795 | DPRINT_ENTER(NETVSC); | |
796 | ||
797 | netDevice = AllocNetDevice(Device); | |
798 | if (!netDevice) | |
799 | { | |
800 | ret = -1; | |
801 | goto Cleanup; | |
802 | } | |
803 | ||
804 | DPRINT_DBG(NETVSC, "netvsc channel object allocated - %p", netDevice); | |
805 | ||
806 | // Initialize the NetVSC channel extension | |
807 | netDevice->ReceiveBufferSize = NETVSC_RECEIVE_BUFFER_SIZE; | |
808 | netDevice->ReceivePacketListLock = SpinlockCreate(); | |
809 | ||
810 | netDevice->SendBufferSize = NETVSC_SEND_BUFFER_SIZE; | |
811 | ||
812 | INITIALIZE_LIST_HEAD(&netDevice->ReceivePacketList); | |
813 | ||
814 | for (i=0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++) | |
815 | { | |
816 | packet = MemAllocZeroed(sizeof(NETVSC_PACKET) + (NETVSC_RECEIVE_SG_COUNT* sizeof(PAGE_BUFFER))); | |
817 | if (!packet) | |
818 | { | |
819 | DPRINT_DBG(NETVSC, "unable to allocate netvsc pkts for receive pool (wanted %d got %d)", NETVSC_RECEIVE_PACKETLIST_COUNT, i); | |
820 | break; | |
821 | } | |
822 | ||
823 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->ListEntry); | |
824 | } | |
825 | netDevice->ChannelInitEvent = WaitEventCreate(); | |
826 | ||
827 | // Open the channel | |
828 | ret = Device->Driver->VmbusChannelInterface.Open(Device, | |
829 | netDriver->RingBufferSize, | |
830 | netDriver->RingBufferSize, | |
831 | NULL, 0, | |
832 | NetVscOnChannelCallback, | |
833 | Device | |
834 | ); | |
835 | ||
836 | if (ret != 0) | |
837 | { | |
838 | DPRINT_ERR(NETVSC, "unable to open channel: %d", ret); | |
839 | ret = -1; | |
840 | goto Cleanup; | |
841 | } | |
842 | ||
843 | // Channel is opened | |
844 | DPRINT_INFO(NETVSC, "*** NetVSC channel opened successfully! ***"); | |
845 | ||
846 | // Connect with the NetVsp | |
847 | ret = NetVscConnectToVsp(Device); | |
848 | if (ret != 0) | |
849 | { | |
850 | DPRINT_ERR(NETVSC, "unable to connect to NetVSP - %d", ret); | |
851 | ret = -1; | |
852 | goto Close; | |
853 | } | |
854 | ||
855 | DPRINT_INFO(NETVSC, "*** NetVSC channel handshake result - %d ***", ret); | |
856 | ||
857 | DPRINT_EXIT(NETVSC); | |
858 | return ret; | |
859 | ||
860 | Close: | |
861 | // Now, we can close the channel safely | |
862 | Device->Driver->VmbusChannelInterface.Close(Device); | |
863 | ||
864 | Cleanup: | |
865 | ||
866 | if (netDevice) | |
867 | { | |
868 | WaitEventClose(netDevice->ChannelInitEvent); | |
869 | ||
870 | while (!IsListEmpty(&netDevice->ReceivePacketList)) | |
871 | { | |
872 | entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList); | |
873 | packet = CONTAINING_RECORD(entry, NETVSC_PACKET, ListEntry); | |
874 | MemFree(packet); | |
875 | } | |
876 | ||
877 | SpinlockClose(netDevice->ReceivePacketListLock); | |
878 | ||
879 | ReleaseOutboundNetDevice(Device); | |
880 | ReleaseInboundNetDevice(Device); | |
881 | ||
882 | FreeNetDevice(netDevice); | |
883 | } | |
884 | ||
885 | DPRINT_EXIT(NETVSC); | |
886 | return ret; | |
887 | } | |
888 | ||
889 | ||
890 | /*++ | |
891 | ||
892 | Name: | |
893 | NetVscOnDeviceRemove() | |
894 | ||
895 | Description: | |
896 | Callback when the root bus device is removed | |
897 | ||
898 | --*/ | |
899 | int | |
900 | NetVscOnDeviceRemove( | |
901 | DEVICE_OBJECT *Device | |
902 | ) | |
903 | { | |
904 | NETVSC_DEVICE *netDevice; | |
905 | NETVSC_PACKET *netvscPacket; | |
906 | int ret=0; | |
907 | LIST_ENTRY *entry; | |
908 | ||
909 | DPRINT_ENTER(NETVSC); | |
910 | ||
911 | DPRINT_INFO(NETVSC, "Disabling outbound traffic on net device (%p)...", Device->Extension); | |
912 | ||
913 | // Stop outbound traffic ie sends and receives completions | |
914 | netDevice = ReleaseOutboundNetDevice(Device); | |
915 | if (!netDevice) | |
916 | { | |
917 | DPRINT_ERR(NETVSC, "No net device present!!"); | |
918 | return -1; | |
919 | } | |
920 | ||
921 | // Wait for all send completions | |
922 | while (netDevice->NumOutstandingSends) | |
923 | { | |
924 | DPRINT_INFO(NETVSC, "waiting for %d requests to complete...", netDevice->NumOutstandingSends); | |
925 | ||
926 | Sleep(100); | |
927 | } | |
928 | ||
929 | DPRINT_INFO(NETVSC, "Disconnecting from netvsp..."); | |
930 | ||
931 | NetVscDisconnectFromVsp(netDevice); | |
932 | ||
933 | DPRINT_INFO(NETVSC, "Disabling inbound traffic on net device (%p)...", Device->Extension); | |
934 | ||
935 | // Stop inbound traffic ie receives and sends completions | |
936 | netDevice = ReleaseInboundNetDevice(Device); | |
937 | ||
938 | // At this point, no one should be accessing netDevice except in here | |
939 | DPRINT_INFO(NETVSC, "net device (%p) safe to remove", netDevice); | |
940 | ||
941 | // Now, we can close the channel safely | |
942 | Device->Driver->VmbusChannelInterface.Close(Device); | |
943 | ||
944 | // Release all resources | |
945 | while (!IsListEmpty(&netDevice->ReceivePacketList)) | |
946 | { | |
947 | entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList); | |
948 | netvscPacket = CONTAINING_RECORD(entry, NETVSC_PACKET, ListEntry); | |
949 | ||
950 | MemFree(netvscPacket); | |
951 | } | |
952 | ||
953 | SpinlockClose(netDevice->ReceivePacketListLock); | |
954 | WaitEventClose(netDevice->ChannelInitEvent); | |
955 | FreeNetDevice(netDevice); | |
956 | ||
957 | DPRINT_EXIT(NETVSC); | |
958 | return ret; | |
959 | } | |
960 | ||
961 | ||
962 | ||
963 | /*++ | |
964 | ||
965 | Name: | |
966 | NetVscOnCleanup() | |
967 | ||
968 | Description: | |
969 | Perform any cleanup when the driver is removed | |
970 | ||
971 | --*/ | |
972 | void | |
973 | NetVscOnCleanup( | |
974 | DRIVER_OBJECT *drv | |
975 | ) | |
976 | { | |
977 | DPRINT_ENTER(NETVSC); | |
978 | ||
979 | DPRINT_EXIT(NETVSC); | |
980 | } | |
981 | ||
982 | static void | |
983 | NetVscOnSendCompletion( | |
984 | DEVICE_OBJECT *Device, | |
985 | VMPACKET_DESCRIPTOR *Packet | |
986 | ) | |
987 | { | |
988 | NETVSC_DEVICE* netDevice; | |
989 | NVSP_MESSAGE *nvspPacket; | |
990 | NETVSC_PACKET *nvscPacket; | |
991 | ||
992 | DPRINT_ENTER(NETVSC); | |
993 | ||
994 | netDevice = GetInboundNetDevice(Device); | |
995 | if (!netDevice) | |
996 | { | |
997 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
998 | DPRINT_EXIT(NETVSC); | |
999 | return; | |
1000 | } | |
1001 | ||
1002 | nvspPacket = (NVSP_MESSAGE*)((ULONG_PTR)Packet + (Packet->DataOffset8 << 3)); | |
1003 | ||
1004 | DPRINT_DBG(NETVSC, "send completion packet - type %d", nvspPacket->Header.MessageType); | |
1005 | ||
1006 | if (nvspPacket->Header.MessageType == NvspMessageTypeInitComplete || | |
1007 | nvspPacket->Header.MessageType == NvspMessage1TypeSendReceiveBufferComplete || | |
1008 | nvspPacket->Header.MessageType == NvspMessage1TypeSendSendBufferComplete) | |
1009 | { | |
1010 | // Copy the response back | |
1011 | memcpy(&netDevice->ChannelInitPacket, nvspPacket, sizeof(NVSP_MESSAGE)); | |
1012 | WaitEventSet(netDevice->ChannelInitEvent); | |
1013 | } | |
1014 | else if (nvspPacket->Header.MessageType == NvspMessage1TypeSendRNDISPacketComplete) | |
1015 | { | |
1016 | // Get the send context | |
1017 | nvscPacket = (NETVSC_PACKET *)(ULONG_PTR)Packet->TransactionId; | |
1018 | ASSERT(nvscPacket); | |
1019 | ||
1020 | // Notify the layer above us | |
1021 | nvscPacket->Completion.Send.OnSendCompletion(nvscPacket->Completion.Send.SendCompletionContext); | |
1022 | ||
1023 | InterlockedDecrement(&netDevice->NumOutstandingSends); | |
1024 | } | |
1025 | else | |
1026 | { | |
1027 | DPRINT_ERR(NETVSC, "Unknown send completion packet type - %d received!!", nvspPacket->Header.MessageType); | |
1028 | } | |
1029 | ||
1030 | PutNetDevice(Device); | |
1031 | DPRINT_EXIT(NETVSC); | |
1032 | } | |
1033 | ||
1034 | ||
1035 | ||
1036 | static int | |
1037 | NetVscOnSend( | |
1038 | DEVICE_OBJECT *Device, | |
1039 | NETVSC_PACKET *Packet | |
1040 | ) | |
1041 | { | |
1042 | NETVSC_DEVICE* netDevice; | |
1043 | int ret=0; | |
1044 | ||
1045 | NVSP_MESSAGE sendMessage; | |
1046 | ||
1047 | DPRINT_ENTER(NETVSC); | |
1048 | ||
1049 | netDevice = GetOutboundNetDevice(Device); | |
1050 | if (!netDevice) | |
1051 | { | |
1052 | DPRINT_ERR(NETVSC, "net device (%p) shutting down...ignoring outbound packets", netDevice); | |
1053 | DPRINT_EXIT(NETVSC); | |
1054 | return -2; | |
1055 | } | |
1056 | ||
1057 | sendMessage.Header.MessageType = NvspMessage1TypeSendRNDISPacket; | |
1058 | if (Packet->IsDataPacket) | |
1059 | sendMessage.Messages.Version1Messages.SendRNDISPacket.ChannelType = 0;// 0 is RMC_DATA; | |
1060 | else | |
1061 | sendMessage.Messages.Version1Messages.SendRNDISPacket.ChannelType = 1;// 1 is RMC_CONTROL; | |
1062 | ||
1063 | // Not using send buffer section | |
1064 | sendMessage.Messages.Version1Messages.SendRNDISPacket.SendBufferSectionIndex = 0xFFFFFFFF; | |
1065 | sendMessage.Messages.Version1Messages.SendRNDISPacket.SendBufferSectionSize = 0; | |
1066 | ||
1067 | if (Packet->PageBufferCount) | |
1068 | { | |
1069 | ret = Device->Driver->VmbusChannelInterface.SendPacketPageBuffer(Device, | |
1070 | Packet->PageBuffers, | |
1071 | Packet->PageBufferCount, | |
1072 | &sendMessage, | |
1073 | sizeof(NVSP_MESSAGE), | |
1074 | (ULONG_PTR)Packet); | |
1075 | } | |
1076 | else | |
1077 | { | |
1078 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
1079 | &sendMessage, | |
1080 | sizeof(NVSP_MESSAGE), | |
1081 | (ULONG_PTR)Packet, | |
1082 | VmbusPacketTypeDataInBand, | |
1083 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
1084 | ||
1085 | } | |
1086 | ||
1087 | if (ret != 0) | |
1088 | { | |
1089 | DPRINT_ERR(NETVSC, "Unable to send packet %p ret %d", Packet, ret); | |
1090 | } | |
1091 | ||
1092 | InterlockedIncrement(&netDevice->NumOutstandingSends); | |
1093 | PutNetDevice(Device); | |
1094 | ||
1095 | DPRINT_EXIT(NETVSC); | |
1096 | return ret; | |
1097 | } | |
1098 | ||
1099 | ||
1100 | static void | |
1101 | NetVscOnReceive( | |
1102 | DEVICE_OBJECT *Device, | |
1103 | VMPACKET_DESCRIPTOR *Packet | |
1104 | ) | |
1105 | { | |
1106 | NETVSC_DEVICE* netDevice; | |
1107 | VMTRANSFER_PAGE_PACKET_HEADER *vmxferpagePacket; | |
1108 | NVSP_MESSAGE *nvspPacket; | |
1109 | NETVSC_PACKET *netvscPacket=NULL; | |
1110 | LIST_ENTRY* entry; | |
1111 | ULONG_PTR start; | |
1112 | ULONG_PTR end, endVirtual; | |
1113 | //NETVSC_DRIVER_OBJECT *netvscDriver; | |
1114 | XFERPAGE_PACKET *xferpagePacket=NULL; | |
1115 | LIST_ENTRY listHead; | |
1116 | ||
1117 | int i=0, j=0; | |
1118 | int count=0, bytesRemain=0; | |
1119 | ||
1120 | DPRINT_ENTER(NETVSC); | |
1121 | ||
1122 | netDevice = GetInboundNetDevice(Device); | |
1123 | if (!netDevice) | |
1124 | { | |
1125 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
1126 | DPRINT_EXIT(NETVSC); | |
1127 | return; | |
1128 | } | |
1129 | ||
1130 | // All inbound packets other than send completion should be xfer page packet | |
1131 | if (Packet->Type != VmbusPacketTypeDataUsingTransferPages) | |
1132 | { | |
1133 | DPRINT_ERR(NETVSC, "Unknown packet type received - %d", Packet->Type); | |
1134 | PutNetDevice(Device); | |
1135 | return; | |
1136 | } | |
1137 | ||
1138 | nvspPacket = (NVSP_MESSAGE*)((ULONG_PTR)Packet + (Packet->DataOffset8 << 3)); | |
1139 | ||
1140 | // Make sure this is a valid nvsp packet | |
1141 | if (nvspPacket->Header.MessageType != NvspMessage1TypeSendRNDISPacket ) | |
1142 | { | |
1143 | DPRINT_ERR(NETVSC, "Unknown nvsp packet type received - %d", nvspPacket->Header.MessageType); | |
1144 | PutNetDevice(Device); | |
1145 | return; | |
1146 | } | |
1147 | ||
1148 | DPRINT_DBG(NETVSC, "NVSP packet received - type %d", nvspPacket->Header.MessageType); | |
1149 | ||
1150 | vmxferpagePacket = (VMTRANSFER_PAGE_PACKET_HEADER*)Packet; | |
1151 | ||
1152 | if (vmxferpagePacket->TransferPageSetId != NETVSC_RECEIVE_BUFFER_ID) | |
1153 | { | |
1154 | DPRINT_ERR(NETVSC, "Invalid xfer page set id - expecting %x got %x", NETVSC_RECEIVE_BUFFER_ID, vmxferpagePacket->TransferPageSetId); | |
1155 | PutNetDevice(Device); | |
1156 | return; | |
1157 | } | |
1158 | ||
1159 | DPRINT_DBG(NETVSC, "xfer page - range count %d", vmxferpagePacket->RangeCount); | |
1160 | ||
1161 | INITIALIZE_LIST_HEAD(&listHead); | |
1162 | ||
1163 | // Grab free packets (range count + 1) to represent this xfer page packet. +1 to represent | |
1164 | // the xfer page packet itself. We grab it here so that we know exactly how many we can fulfil | |
1165 | SpinlockAcquire(netDevice->ReceivePacketListLock); | |
1166 | while (!IsListEmpty(&netDevice->ReceivePacketList)) | |
1167 | { | |
1168 | entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList); | |
1169 | netvscPacket = CONTAINING_RECORD(entry, NETVSC_PACKET, ListEntry); | |
1170 | ||
1171 | INSERT_TAIL_LIST(&listHead, &netvscPacket->ListEntry); | |
1172 | ||
1173 | if (++count == vmxferpagePacket->RangeCount + 1) | |
1174 | break; | |
1175 | } | |
1176 | SpinlockRelease(netDevice->ReceivePacketListLock); | |
1177 | ||
1178 | // We need at least 2 netvsc pkts (1 to represent the xfer page and at least 1 for the range) | |
1179 | // i.e. we can handled some of the xfer page packet ranges... | |
1180 | if (count < 2) | |
1181 | { | |
1182 | DPRINT_ERR(NETVSC, "Got only %d netvsc pkt...needed %d pkts. Dropping this xfer page packet completely!", count, vmxferpagePacket->RangeCount+1); | |
1183 | ||
1184 | // Return it to the freelist | |
1185 | SpinlockAcquire(netDevice->ReceivePacketListLock); | |
1186 | for (i=count; i != 0; i--) | |
1187 | { | |
1188 | entry = REMOVE_HEAD_LIST(&listHead); | |
1189 | netvscPacket = CONTAINING_RECORD(entry, NETVSC_PACKET, ListEntry); | |
1190 | ||
1191 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &netvscPacket->ListEntry); | |
1192 | } | |
1193 | SpinlockRelease(netDevice->ReceivePacketListLock); | |
1194 | ||
1195 | NetVscSendReceiveCompletion(Device, vmxferpagePacket->d.TransactionId); | |
1196 | ||
1197 | PutNetDevice(Device); | |
1198 | return; | |
1199 | } | |
1200 | ||
1201 | // Remove the 1st packet to represent the xfer page packet itself | |
1202 | entry = REMOVE_HEAD_LIST(&listHead); | |
1203 | xferpagePacket = CONTAINING_RECORD(entry, XFERPAGE_PACKET, ListEntry); | |
1204 | xferpagePacket->Count = count - 1; // This is how much we can satisfy | |
1205 | ASSERT(xferpagePacket->Count > 0 && xferpagePacket->Count <= vmxferpagePacket->RangeCount); | |
1206 | ||
1207 | if (xferpagePacket->Count != vmxferpagePacket->RangeCount) | |
1208 | { | |
1209 | DPRINT_INFO(NETVSC, "Needed %d netvsc pkts to satisy this xfer page...got %d", vmxferpagePacket->RangeCount, xferpagePacket->Count); | |
1210 | } | |
1211 | ||
1212 | // Each range represents 1 RNDIS pkt that contains 1 ethernet frame | |
1213 | for (i=0; i < (count - 1); i++) | |
1214 | { | |
1215 | entry = REMOVE_HEAD_LIST(&listHead); | |
1216 | netvscPacket = CONTAINING_RECORD(entry, NETVSC_PACKET, ListEntry); | |
1217 | ||
1218 | // Initialize the netvsc packet | |
1219 | netvscPacket->XferPagePacket = xferpagePacket; | |
1220 | netvscPacket->Completion.Recv.OnReceiveCompletion = NetVscOnReceiveCompletion; | |
1221 | netvscPacket->Completion.Recv.ReceiveCompletionContext = netvscPacket; | |
1222 | netvscPacket->Device = Device; | |
1223 | netvscPacket->Completion.Recv.ReceiveCompletionTid = vmxferpagePacket->d.TransactionId; // Save this so that we can send it back | |
1224 | ||
1225 | netvscPacket->TotalDataBufferLength = vmxferpagePacket->Ranges[i].ByteCount; | |
1226 | netvscPacket->PageBufferCount = 1; | |
1227 | ||
1228 | ASSERT(vmxferpagePacket->Ranges[i].ByteOffset + vmxferpagePacket->Ranges[i].ByteCount < netDevice->ReceiveBufferSize); | |
1229 | ||
1230 | netvscPacket->PageBuffers[0].Length = vmxferpagePacket->Ranges[i].ByteCount; | |
1231 | ||
1232 | start = GetPhysicalAddress((void*)((ULONG_PTR)netDevice->ReceiveBuffer + vmxferpagePacket->Ranges[i].ByteOffset)); | |
1233 | ||
1234 | netvscPacket->PageBuffers[0].Pfn = start >> PAGE_SHIFT; | |
1235 | endVirtual = (ULONG_PTR)netDevice->ReceiveBuffer | |
1236 | + vmxferpagePacket->Ranges[i].ByteOffset | |
1237 | + vmxferpagePacket->Ranges[i].ByteCount -1; | |
1238 | end = GetPhysicalAddress((void*)endVirtual); | |
1239 | ||
1240 | // Calculate the page relative offset | |
1241 | netvscPacket->PageBuffers[0].Offset = vmxferpagePacket->Ranges[i].ByteOffset & (PAGE_SIZE -1); | |
1242 | if ((end >> PAGE_SHIFT) != (start>>PAGE_SHIFT)) { | |
1243 | //Handle frame across multiple pages: | |
1244 | netvscPacket->PageBuffers[0].Length = | |
1245 | (netvscPacket->PageBuffers[0].Pfn <<PAGE_SHIFT) + PAGE_SIZE - start; | |
1246 | bytesRemain = netvscPacket->TotalDataBufferLength - netvscPacket->PageBuffers[0].Length; | |
1247 | for (j=1; j<NETVSC_PACKET_MAXPAGE; j++) { | |
1248 | netvscPacket->PageBuffers[j].Offset = 0; | |
1249 | if (bytesRemain <= PAGE_SIZE) { | |
1250 | netvscPacket->PageBuffers[j].Length = bytesRemain; | |
1251 | bytesRemain = 0; | |
1252 | } else { | |
1253 | netvscPacket->PageBuffers[j].Length = PAGE_SIZE; | |
1254 | bytesRemain -= PAGE_SIZE; | |
1255 | } | |
1256 | netvscPacket->PageBuffers[j].Pfn = | |
1257 | GetPhysicalAddress((void*)(endVirtual - bytesRemain)) >> PAGE_SHIFT; | |
1258 | netvscPacket->PageBufferCount++; | |
1259 | if (bytesRemain == 0) | |
1260 | break; | |
1261 | } | |
1262 | ASSERT(bytesRemain == 0); | |
1263 | } | |
1264 | DPRINT_DBG(NETVSC, "[%d] - (abs offset %u len %u) => (pfn %llx, offset %u, len %u)", | |
1265 | i, | |
1266 | vmxferpagePacket->Ranges[i].ByteOffset, | |
1267 | vmxferpagePacket->Ranges[i].ByteCount, | |
1268 | netvscPacket->PageBuffers[0].Pfn, | |
1269 | netvscPacket->PageBuffers[0].Offset, | |
1270 | netvscPacket->PageBuffers[0].Length); | |
1271 | ||
1272 | // Pass it to the upper layer | |
1273 | ((NETVSC_DRIVER_OBJECT*)Device->Driver)->OnReceiveCallback(Device, netvscPacket); | |
1274 | ||
1275 | NetVscOnReceiveCompletion(netvscPacket->Completion.Recv.ReceiveCompletionContext); | |
1276 | } | |
1277 | ||
1278 | ASSERT(IsListEmpty(&listHead)); | |
1279 | ||
1280 | PutNetDevice(Device); | |
1281 | DPRINT_EXIT(NETVSC); | |
1282 | } | |
1283 | ||
1284 | ||
1285 | static void | |
1286 | NetVscSendReceiveCompletion( | |
1287 | DEVICE_OBJECT *Device, | |
1288 | UINT64 TransactionId | |
1289 | ) | |
1290 | { | |
1291 | NVSP_MESSAGE recvcompMessage; | |
1292 | int retries=0; | |
1293 | int ret=0; | |
1294 | ||
1295 | DPRINT_DBG(NETVSC, "Sending receive completion pkt - %llx", TransactionId); | |
1296 | ||
1297 | recvcompMessage.Header.MessageType = NvspMessage1TypeSendRNDISPacketComplete; | |
1298 | ||
1299 | // FIXME: Pass in the status | |
1300 | recvcompMessage.Messages.Version1Messages.SendRNDISPacketComplete.Status = NvspStatusSuccess; | |
1301 | ||
1302 | retry_send_cmplt: | |
1303 | // Send the completion | |
1304 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
1305 | &recvcompMessage, | |
1306 | sizeof(NVSP_MESSAGE), | |
1307 | TransactionId, | |
1308 | VmbusPacketTypeCompletion, | |
1309 | 0); | |
1310 | if (ret == 0) // success | |
1311 | { | |
1312 | // no-op | |
1313 | } | |
1314 | else if (ret == -1) // no more room...wait a bit and attempt to retry 3 times | |
1315 | { | |
1316 | retries++; | |
1317 | DPRINT_ERR(NETVSC, "unable to send receive completion pkt (tid %llx)...retrying %d", TransactionId, retries); | |
1318 | ||
1319 | if (retries < 4) | |
1320 | { | |
1321 | Sleep(100); | |
1322 | goto retry_send_cmplt; | |
1323 | } | |
1324 | else | |
1325 | { | |
1326 | DPRINT_ERR(NETVSC, "unable to send receive completion pkt (tid %llx)...give up retrying", TransactionId); | |
1327 | } | |
1328 | } | |
1329 | else | |
1330 | { | |
1331 | DPRINT_ERR(NETVSC, "unable to send receive completion pkt - %llx", TransactionId); | |
1332 | } | |
1333 | } | |
1334 | ||
1335 | // | |
1336 | // Send a receive completion packet to RNDIS device (ie NetVsp) | |
1337 | // | |
1338 | static void | |
1339 | NetVscOnReceiveCompletion( | |
8282c400 | 1340 | void * Context) |
fceaf24a HJ |
1341 | { |
1342 | NETVSC_PACKET *packet = (NETVSC_PACKET*)Context; | |
1343 | DEVICE_OBJECT *device = (DEVICE_OBJECT*)packet->Device; | |
1344 | NETVSC_DEVICE* netDevice; | |
1345 | UINT64 transactionId=0; | |
1346 | BOOL fSendReceiveComp = FALSE; | |
1347 | ||
1348 | DPRINT_ENTER(NETVSC); | |
1349 | ||
1350 | ASSERT(packet->XferPagePacket); | |
1351 | ||
1352 | // Even though it seems logical to do a GetOutboundNetDevice() here to send out receive completion, | |
1353 | // we are using GetInboundNetDevice() since we may have disable outbound traffic already. | |
1354 | netDevice = GetInboundNetDevice(device); | |
1355 | if (!netDevice) | |
1356 | { | |
1357 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
1358 | DPRINT_EXIT(NETVSC); | |
1359 | return; | |
1360 | } | |
1361 | ||
1362 | // Overloading use of the lock. | |
1363 | SpinlockAcquire(netDevice->ReceivePacketListLock); | |
1364 | ||
1365 | ASSERT(packet->XferPagePacket->Count > 0); | |
1366 | packet->XferPagePacket->Count--; | |
1367 | ||
1368 | // Last one in the line that represent 1 xfer page packet. | |
1369 | // Return the xfer page packet itself to the freelist | |
1370 | if (packet->XferPagePacket->Count == 0) | |
1371 | { | |
1372 | fSendReceiveComp = TRUE; | |
1373 | transactionId = packet->Completion.Recv.ReceiveCompletionTid; | |
1374 | ||
1375 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->XferPagePacket->ListEntry); | |
1376 | } | |
1377 | ||
1378 | // Put the packet back | |
1379 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->ListEntry); | |
1380 | SpinlockRelease(netDevice->ReceivePacketListLock); | |
1381 | ||
1382 | // Send a receive completion for the xfer page packet | |
1383 | if (fSendReceiveComp) | |
1384 | { | |
1385 | NetVscSendReceiveCompletion(device, transactionId); | |
1386 | } | |
1387 | ||
1388 | PutNetDevice(device); | |
1389 | DPRINT_EXIT(NETVSC); | |
1390 | } | |
1391 | ||
1392 | ||
1393 | ||
1394 | void | |
1395 | NetVscOnChannelCallback( | |
8282c400 | 1396 | void * Context |
fceaf24a HJ |
1397 | ) |
1398 | { | |
1399 | const int netPacketSize=2048; | |
1400 | int ret=0; | |
1401 | DEVICE_OBJECT *device=(DEVICE_OBJECT*)Context; | |
1402 | NETVSC_DEVICE *netDevice; | |
1403 | ||
1404 | UINT32 bytesRecvd; | |
1405 | UINT64 requestId; | |
1406 | UCHAR packet[netPacketSize]; | |
1407 | VMPACKET_DESCRIPTOR *desc; | |
1408 | UCHAR *buffer=packet; | |
1409 | int bufferlen=netPacketSize; | |
1410 | ||
1411 | ||
1412 | DPRINT_ENTER(NETVSC); | |
1413 | ||
1414 | ASSERT(device); | |
1415 | ||
1416 | netDevice = GetInboundNetDevice(device); | |
1417 | if (!netDevice) | |
1418 | { | |
1419 | DPRINT_ERR(NETVSC, "net device (%p) shutting down...ignoring inbound packets", netDevice); | |
1420 | DPRINT_EXIT(NETVSC); | |
1421 | return; | |
1422 | } | |
1423 | ||
1424 | do | |
1425 | { | |
1426 | ret = device->Driver->VmbusChannelInterface.RecvPacketRaw(device, | |
1427 | buffer, | |
1428 | bufferlen, | |
1429 | &bytesRecvd, | |
1430 | &requestId); | |
1431 | ||
1432 | if (ret == 0) | |
1433 | { | |
1434 | if (bytesRecvd > 0) | |
1435 | { | |
1436 | DPRINT_DBG(NETVSC, "receive %d bytes, tid %llx", bytesRecvd, requestId); | |
1437 | ||
1438 | desc = (VMPACKET_DESCRIPTOR*)buffer; | |
1439 | switch (desc->Type) | |
1440 | { | |
1441 | case VmbusPacketTypeCompletion: | |
1442 | NetVscOnSendCompletion(device, desc); | |
1443 | break; | |
1444 | ||
1445 | case VmbusPacketTypeDataUsingTransferPages: | |
1446 | NetVscOnReceive(device, desc); | |
1447 | break; | |
1448 | ||
1449 | default: | |
1450 | DPRINT_ERR(NETVSC, "unhandled packet type %d, tid %llx len %d\n", desc->Type, requestId, bytesRecvd); | |
1451 | break; | |
1452 | } | |
1453 | ||
1454 | // reset | |
1455 | if (bufferlen > netPacketSize) | |
1456 | { | |
1457 | MemFree(buffer); | |
1458 | ||
1459 | buffer = packet; | |
1460 | bufferlen = netPacketSize; | |
1461 | } | |
1462 | } | |
1463 | else | |
1464 | { | |
1465 | //DPRINT_DBG(NETVSC, "nothing else to read..."); | |
1466 | ||
1467 | // reset | |
1468 | if (bufferlen > netPacketSize) | |
1469 | { | |
1470 | MemFree(buffer); | |
1471 | ||
1472 | buffer = packet; | |
1473 | bufferlen = netPacketSize; | |
1474 | } | |
1475 | ||
1476 | break; | |
1477 | } | |
1478 | } | |
1479 | else if (ret == -2) // Handle large packet | |
1480 | { | |
1481 | buffer = MemAllocAtomic(bytesRecvd); | |
1482 | if (buffer == NULL) | |
1483 | { | |
1484 | // Try again next time around | |
1485 | DPRINT_ERR(NETVSC, "unable to allocate buffer of size (%d)!!", bytesRecvd); | |
1486 | break; | |
1487 | } | |
1488 | ||
1489 | bufferlen = bytesRecvd; | |
1490 | } | |
1491 | else | |
1492 | { | |
1493 | ASSERT(0); | |
1494 | } | |
1495 | } while (1); | |
1496 | ||
1497 | PutNetDevice(device); | |
1498 | DPRINT_EXIT(NETVSC); | |
1499 | return; | |
1500 | } |