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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 | |
5654e932 | 25 | #include <linux/kernel.h> |
c86f3e2a | 26 | #include "include/logging.h" |
fceaf24a HJ |
27 | #include "NetVsc.h" |
28 | #include "RndisFilter.h" | |
29 | ||
30 | ||
31 | // | |
32 | // Globals | |
33 | // | |
34 | static const char* gDriverName="netvsc"; | |
35 | ||
36 | // {F8615163-DF3E-46c5-913F-F2D2F965ED0E} | |
37 | static const GUID gNetVscDeviceType={ | |
38 | .Data = {0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E} | |
39 | }; | |
40 | ||
41 | ||
42 | // | |
43 | // Internal routines | |
44 | // | |
45 | static int | |
46 | NetVscOnDeviceAdd( | |
47 | DEVICE_OBJECT *Device, | |
48 | void *AdditionalInfo | |
49 | ); | |
50 | ||
51 | static int | |
52 | NetVscOnDeviceRemove( | |
53 | DEVICE_OBJECT *Device | |
54 | ); | |
55 | ||
56 | static void | |
57 | NetVscOnCleanup( | |
58 | DRIVER_OBJECT *Driver | |
59 | ); | |
60 | ||
61 | static void | |
62 | NetVscOnChannelCallback( | |
8282c400 | 63 | void * context |
fceaf24a HJ |
64 | ); |
65 | ||
66 | static int | |
67 | NetVscInitializeSendBufferWithNetVsp( | |
68 | DEVICE_OBJECT *Device | |
69 | ); | |
70 | ||
71 | static int | |
72 | NetVscInitializeReceiveBufferWithNetVsp( | |
73 | DEVICE_OBJECT *Device | |
74 | ); | |
75 | ||
76 | static int | |
77 | NetVscDestroySendBuffer( | |
78 | NETVSC_DEVICE *NetDevice | |
79 | ); | |
80 | ||
81 | static int | |
82 | NetVscDestroyReceiveBuffer( | |
83 | NETVSC_DEVICE *NetDevice | |
84 | ); | |
85 | ||
86 | static int | |
87 | NetVscConnectToVsp( | |
88 | DEVICE_OBJECT *Device | |
89 | ); | |
90 | ||
91 | static void | |
92 | NetVscOnSendCompletion( | |
93 | DEVICE_OBJECT *Device, | |
94 | VMPACKET_DESCRIPTOR *Packet | |
95 | ); | |
96 | ||
97 | static int | |
98 | NetVscOnSend( | |
99 | DEVICE_OBJECT *Device, | |
100 | NETVSC_PACKET *Packet | |
101 | ); | |
102 | ||
103 | static void | |
104 | NetVscOnReceive( | |
105 | DEVICE_OBJECT *Device, | |
106 | VMPACKET_DESCRIPTOR *Packet | |
107 | ); | |
108 | ||
109 | static void | |
110 | NetVscOnReceiveCompletion( | |
8282c400 | 111 | void * Context |
fceaf24a HJ |
112 | ); |
113 | ||
114 | static void | |
115 | NetVscSendReceiveCompletion( | |
116 | DEVICE_OBJECT *Device, | |
117 | UINT64 TransactionId | |
118 | ); | |
119 | ||
120 | static inline NETVSC_DEVICE* AllocNetDevice(DEVICE_OBJECT *Device) | |
121 | { | |
122 | NETVSC_DEVICE *netDevice; | |
123 | ||
124 | netDevice = MemAllocZeroed(sizeof(NETVSC_DEVICE)); | |
125 | if (!netDevice) | |
126 | return NULL; | |
127 | ||
128 | // Set to 2 to allow both inbound and outbound traffic | |
129 | InterlockedCompareExchange(&netDevice->RefCount, 2, 0); | |
130 | ||
131 | netDevice->Device = Device; | |
132 | Device->Extension = netDevice; | |
133 | ||
134 | return netDevice; | |
135 | } | |
136 | ||
137 | static inline void FreeNetDevice(NETVSC_DEVICE *Device) | |
138 | { | |
139 | ASSERT(Device->RefCount == 0); | |
140 | Device->Device->Extension = NULL; | |
141 | MemFree(Device); | |
142 | } | |
143 | ||
144 | ||
145 | // Get the net device object iff exists and its refcount > 1 | |
146 | static inline NETVSC_DEVICE* GetOutboundNetDevice(DEVICE_OBJECT *Device) | |
147 | { | |
148 | NETVSC_DEVICE *netDevice; | |
149 | ||
150 | netDevice = (NETVSC_DEVICE*)Device->Extension; | |
151 | if (netDevice && netDevice->RefCount > 1) | |
152 | { | |
153 | InterlockedIncrement(&netDevice->RefCount); | |
154 | } | |
155 | else | |
156 | { | |
157 | netDevice = NULL; | |
158 | } | |
159 | ||
160 | return netDevice; | |
161 | } | |
162 | ||
163 | // Get the net device object iff exists and its refcount > 0 | |
164 | static inline NETVSC_DEVICE* GetInboundNetDevice(DEVICE_OBJECT *Device) | |
165 | { | |
166 | NETVSC_DEVICE *netDevice; | |
167 | ||
168 | netDevice = (NETVSC_DEVICE*)Device->Extension; | |
169 | if (netDevice && netDevice->RefCount) | |
170 | { | |
171 | InterlockedIncrement(&netDevice->RefCount); | |
172 | } | |
173 | else | |
174 | { | |
175 | netDevice = NULL; | |
176 | } | |
177 | ||
178 | return netDevice; | |
179 | } | |
180 | ||
181 | static inline void PutNetDevice(DEVICE_OBJECT *Device) | |
182 | { | |
183 | NETVSC_DEVICE *netDevice; | |
184 | ||
185 | netDevice = (NETVSC_DEVICE*)Device->Extension; | |
186 | ASSERT(netDevice); | |
187 | ||
188 | InterlockedDecrement(&netDevice->RefCount); | |
189 | } | |
190 | ||
191 | static inline NETVSC_DEVICE* ReleaseOutboundNetDevice(DEVICE_OBJECT *Device) | |
192 | { | |
193 | NETVSC_DEVICE *netDevice; | |
194 | ||
195 | netDevice = (NETVSC_DEVICE*)Device->Extension; | |
196 | if (netDevice == NULL) | |
197 | return NULL; | |
198 | ||
199 | // Busy wait until the ref drop to 2, then set it to 1 | |
200 | while (InterlockedCompareExchange(&netDevice->RefCount, 1, 2) != 2) | |
201 | { | |
202 | Sleep(100); | |
203 | } | |
204 | ||
205 | return netDevice; | |
206 | } | |
207 | ||
208 | static inline NETVSC_DEVICE* ReleaseInboundNetDevice(DEVICE_OBJECT *Device) | |
209 | { | |
210 | NETVSC_DEVICE *netDevice; | |
211 | ||
212 | netDevice = (NETVSC_DEVICE*)Device->Extension; | |
213 | if (netDevice == NULL) | |
214 | return NULL; | |
215 | ||
216 | // Busy wait until the ref drop to 1, then set it to 0 | |
217 | while (InterlockedCompareExchange(&netDevice->RefCount, 0, 1) != 1) | |
218 | { | |
219 | Sleep(100); | |
220 | } | |
221 | ||
222 | Device->Extension = NULL; | |
223 | return netDevice; | |
224 | } | |
225 | ||
226 | /*++; | |
227 | ||
228 | ||
229 | Name: | |
230 | NetVscInitialize() | |
231 | ||
232 | Description: | |
233 | Main entry point | |
234 | ||
235 | --*/ | |
236 | int | |
237 | NetVscInitialize( | |
238 | DRIVER_OBJECT *drv | |
239 | ) | |
240 | { | |
241 | NETVSC_DRIVER_OBJECT* driver = (NETVSC_DRIVER_OBJECT*)drv; | |
242 | int ret=0; | |
243 | ||
244 | DPRINT_ENTER(NETVSC); | |
245 | ||
246 | DPRINT_DBG(NETVSC, "sizeof(NETVSC_PACKET)=%d, sizeof(NVSP_MESSAGE)=%d, sizeof(VMTRANSFER_PAGE_PACKET_HEADER)=%d", | |
247 | sizeof(NETVSC_PACKET), sizeof(NVSP_MESSAGE), sizeof(VMTRANSFER_PAGE_PACKET_HEADER)); | |
248 | ||
249 | // Make sure we are at least 2 pages since 1 page is used for control | |
250 | ASSERT(driver->RingBufferSize >= (PAGE_SIZE << 1)); | |
251 | ||
252 | drv->name = gDriverName; | |
253 | memcpy(&drv->deviceType, &gNetVscDeviceType, sizeof(GUID)); | |
254 | ||
255 | // Make sure it is set by the caller | |
256 | ASSERT(driver->OnReceiveCallback); | |
257 | ASSERT(driver->OnLinkStatusChanged); | |
258 | ||
259 | // Setup the dispatch table | |
260 | driver->Base.OnDeviceAdd = NetVscOnDeviceAdd; | |
261 | driver->Base.OnDeviceRemove = NetVscOnDeviceRemove; | |
262 | driver->Base.OnCleanup = NetVscOnCleanup; | |
263 | ||
264 | driver->OnSend = NetVscOnSend; | |
265 | ||
266 | RndisFilterInit(driver); | |
267 | ||
268 | DPRINT_EXIT(NETVSC); | |
269 | ||
270 | return ret; | |
271 | } | |
272 | ||
273 | static int | |
274 | NetVscInitializeReceiveBufferWithNetVsp( | |
275 | DEVICE_OBJECT *Device | |
276 | ) | |
277 | { | |
278 | int ret=0; | |
279 | NETVSC_DEVICE *netDevice; | |
280 | NVSP_MESSAGE *initPacket; | |
281 | ||
282 | DPRINT_ENTER(NETVSC); | |
283 | ||
284 | netDevice = GetOutboundNetDevice(Device); | |
285 | if (!netDevice) | |
286 | { | |
287 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
288 | DPRINT_EXIT(NETVSC); | |
289 | return -1; | |
290 | } | |
291 | ASSERT(netDevice->ReceiveBufferSize > 0); | |
292 | ASSERT((netDevice->ReceiveBufferSize & (PAGE_SIZE-1)) == 0); // page-size grandularity | |
293 | ||
294 | netDevice->ReceiveBuffer = PageAlloc(netDevice->ReceiveBufferSize >> PAGE_SHIFT); | |
295 | if (!netDevice->ReceiveBuffer) | |
296 | { | |
297 | DPRINT_ERR(NETVSC, "unable to allocate receive buffer of size %d", netDevice->ReceiveBufferSize); | |
298 | ret = -1; | |
299 | goto Cleanup; | |
300 | } | |
301 | ASSERT(((ULONG_PTR)netDevice->ReceiveBuffer & (PAGE_SIZE-1)) == 0); // page-aligned buffer | |
302 | ||
303 | DPRINT_INFO(NETVSC, "Establishing receive buffer's GPADL..."); | |
304 | ||
305 | // Establish the gpadl handle for this buffer on this channel. | |
306 | // Note: This call uses the vmbus connection rather than the channel to establish | |
307 | // the gpadl handle. | |
308 | ret = Device->Driver->VmbusChannelInterface.EstablishGpadl(Device, | |
309 | netDevice->ReceiveBuffer, | |
310 | netDevice->ReceiveBufferSize, | |
311 | &netDevice->ReceiveBufferGpadlHandle); | |
312 | ||
313 | if (ret != 0) | |
314 | { | |
315 | DPRINT_ERR(NETVSC, "unable to establish receive buffer's gpadl"); | |
316 | goto Cleanup; | |
317 | } | |
318 | ||
319 | //WaitEventWait(ext->ChannelInitEvent); | |
320 | ||
321 | // Notify the NetVsp of the gpadl handle | |
322 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendReceiveBuffer..."); | |
323 | ||
324 | initPacket = &netDevice->ChannelInitPacket; | |
325 | ||
326 | memset(initPacket, 0, sizeof(NVSP_MESSAGE)); | |
327 | ||
328 | initPacket->Header.MessageType = NvspMessage1TypeSendReceiveBuffer; | |
329 | initPacket->Messages.Version1Messages.SendReceiveBuffer.GpadlHandle = netDevice->ReceiveBufferGpadlHandle; | |
330 | initPacket->Messages.Version1Messages.SendReceiveBuffer.Id = NETVSC_RECEIVE_BUFFER_ID; | |
331 | ||
332 | // Send the gpadl notification request | |
333 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
334 | initPacket, | |
335 | sizeof(NVSP_MESSAGE), | |
336 | (ULONG_PTR)initPacket, | |
337 | VmbusPacketTypeDataInBand, | |
338 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
339 | if (ret != 0) | |
340 | { | |
341 | DPRINT_ERR(NETVSC, "unable to send receive buffer's gpadl to netvsp"); | |
342 | goto Cleanup; | |
343 | } | |
344 | ||
345 | WaitEventWait(netDevice->ChannelInitEvent); | |
346 | ||
347 | // Check the response | |
348 | if (initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Status != NvspStatusSuccess) | |
349 | { | |
350 | DPRINT_ERR(NETVSC, | |
351 | "Unable to complete receive buffer initialzation with NetVsp - status %d", | |
352 | initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Status); | |
353 | ret = -1; | |
354 | goto Cleanup; | |
355 | } | |
356 | ||
357 | // Parse the response | |
358 | ASSERT(netDevice->ReceiveSectionCount == 0); | |
359 | ASSERT(netDevice->ReceiveSections == NULL); | |
360 | ||
361 | netDevice->ReceiveSectionCount = initPacket->Messages.Version1Messages.SendReceiveBufferComplete.NumSections; | |
362 | ||
363 | netDevice->ReceiveSections = MemAlloc(netDevice->ReceiveSectionCount * sizeof(NVSP_1_RECEIVE_BUFFER_SECTION)); | |
364 | if (netDevice->ReceiveSections == NULL) | |
365 | { | |
366 | ret = -1; | |
367 | goto Cleanup; | |
368 | } | |
369 | ||
370 | memcpy(netDevice->ReceiveSections, | |
371 | initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Sections, | |
372 | netDevice->ReceiveSectionCount * sizeof(NVSP_1_RECEIVE_BUFFER_SECTION)); | |
373 | ||
374 | DPRINT_INFO(NETVSC, | |
375 | "Receive sections info (count %d, offset %d, endoffset %d, suballoc size %d, num suballocs %d)", | |
376 | netDevice->ReceiveSectionCount, netDevice->ReceiveSections[0].Offset, netDevice->ReceiveSections[0].EndOffset, | |
377 | netDevice->ReceiveSections[0].SubAllocationSize, netDevice->ReceiveSections[0].NumSubAllocations); | |
378 | ||
379 | ||
380 | //For 1st release, there should only be 1 section that represents the entire receive buffer | |
381 | if (netDevice->ReceiveSectionCount != 1 || | |
382 | netDevice->ReceiveSections->Offset != 0 ) | |
383 | { | |
384 | ret = -1; | |
385 | goto Cleanup; | |
386 | } | |
387 | ||
388 | goto Exit; | |
389 | ||
390 | Cleanup: | |
391 | NetVscDestroyReceiveBuffer(netDevice); | |
392 | ||
393 | Exit: | |
394 | PutNetDevice(Device); | |
395 | DPRINT_EXIT(NETVSC); | |
396 | return ret; | |
397 | } | |
398 | ||
399 | ||
400 | static int | |
401 | NetVscInitializeSendBufferWithNetVsp( | |
402 | DEVICE_OBJECT *Device | |
403 | ) | |
404 | { | |
405 | int ret=0; | |
406 | NETVSC_DEVICE *netDevice; | |
407 | NVSP_MESSAGE *initPacket; | |
408 | ||
409 | DPRINT_ENTER(NETVSC); | |
410 | ||
411 | netDevice = GetOutboundNetDevice(Device); | |
412 | if (!netDevice) | |
413 | { | |
414 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
415 | DPRINT_EXIT(NETVSC); | |
416 | return -1; | |
417 | } | |
418 | ASSERT(netDevice->SendBufferSize > 0); | |
419 | ASSERT((netDevice->SendBufferSize & (PAGE_SIZE-1)) == 0); // page-size grandularity | |
420 | ||
421 | netDevice->SendBuffer = PageAlloc(netDevice->SendBufferSize >> PAGE_SHIFT); | |
422 | if (!netDevice->SendBuffer) | |
423 | { | |
424 | DPRINT_ERR(NETVSC, "unable to allocate send buffer of size %d", netDevice->SendBufferSize); | |
425 | ret = -1; | |
426 | goto Cleanup; | |
427 | } | |
428 | ASSERT(((ULONG_PTR)netDevice->SendBuffer & (PAGE_SIZE-1)) == 0); // page-aligned buffer | |
429 | ||
430 | DPRINT_INFO(NETVSC, "Establishing send buffer's GPADL..."); | |
431 | ||
432 | // Establish the gpadl handle for this buffer on this channel. | |
433 | // Note: This call uses the vmbus connection rather than the channel to establish | |
434 | // the gpadl handle. | |
435 | ret = Device->Driver->VmbusChannelInterface.EstablishGpadl(Device, | |
436 | netDevice->SendBuffer, | |
437 | netDevice->SendBufferSize, | |
438 | &netDevice->SendBufferGpadlHandle); | |
439 | ||
440 | if (ret != 0) | |
441 | { | |
442 | DPRINT_ERR(NETVSC, "unable to establish send buffer's gpadl"); | |
443 | goto Cleanup; | |
444 | } | |
445 | ||
446 | //WaitEventWait(ext->ChannelInitEvent); | |
447 | ||
448 | // Notify the NetVsp of the gpadl handle | |
449 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendSendBuffer..."); | |
450 | ||
451 | initPacket = &netDevice->ChannelInitPacket; | |
452 | ||
453 | memset(initPacket, 0, sizeof(NVSP_MESSAGE)); | |
454 | ||
455 | initPacket->Header.MessageType = NvspMessage1TypeSendSendBuffer; | |
456 | initPacket->Messages.Version1Messages.SendReceiveBuffer.GpadlHandle = netDevice->SendBufferGpadlHandle; | |
457 | initPacket->Messages.Version1Messages.SendReceiveBuffer.Id = NETVSC_SEND_BUFFER_ID; | |
458 | ||
459 | // Send the gpadl notification request | |
460 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
461 | initPacket, | |
462 | sizeof(NVSP_MESSAGE), | |
463 | (ULONG_PTR)initPacket, | |
464 | VmbusPacketTypeDataInBand, | |
465 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
466 | if (ret != 0) | |
467 | { | |
468 | DPRINT_ERR(NETVSC, "unable to send receive buffer's gpadl to netvsp"); | |
469 | goto Cleanup; | |
470 | } | |
471 | ||
472 | WaitEventWait(netDevice->ChannelInitEvent); | |
473 | ||
474 | // Check the response | |
475 | if (initPacket->Messages.Version1Messages.SendSendBufferComplete.Status != NvspStatusSuccess) | |
476 | { | |
477 | DPRINT_ERR(NETVSC, | |
478 | "Unable to complete send buffer initialzation with NetVsp - status %d", | |
479 | initPacket->Messages.Version1Messages.SendSendBufferComplete.Status); | |
480 | ret = -1; | |
481 | goto Cleanup; | |
482 | } | |
483 | ||
484 | netDevice->SendSectionSize = initPacket->Messages.Version1Messages.SendSendBufferComplete.SectionSize; | |
485 | ||
486 | goto Exit; | |
487 | ||
488 | Cleanup: | |
489 | NetVscDestroySendBuffer(netDevice); | |
490 | ||
491 | Exit: | |
492 | PutNetDevice(Device); | |
493 | DPRINT_EXIT(NETVSC); | |
494 | return ret; | |
495 | } | |
496 | ||
497 | static int | |
498 | NetVscDestroyReceiveBuffer( | |
499 | NETVSC_DEVICE *NetDevice | |
500 | ) | |
501 | { | |
502 | NVSP_MESSAGE *revokePacket; | |
503 | int ret=0; | |
504 | ||
505 | ||
506 | DPRINT_ENTER(NETVSC); | |
507 | ||
508 | // If we got a section count, it means we received a SendReceiveBufferComplete msg | |
509 | // (ie sent NvspMessage1TypeSendReceiveBuffer msg) therefore, we need to send a revoke msg here | |
510 | if (NetDevice->ReceiveSectionCount) | |
511 | { | |
512 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeRevokeReceiveBuffer..."); | |
513 | ||
514 | // Send the revoke receive buffer | |
515 | revokePacket = &NetDevice->RevokePacket; | |
516 | memset(revokePacket, 0, sizeof(NVSP_MESSAGE)); | |
517 | ||
518 | revokePacket->Header.MessageType = NvspMessage1TypeRevokeReceiveBuffer; | |
519 | revokePacket->Messages.Version1Messages.RevokeReceiveBuffer.Id = NETVSC_RECEIVE_BUFFER_ID; | |
520 | ||
521 | ret = NetDevice->Device->Driver->VmbusChannelInterface.SendPacket(NetDevice->Device, | |
522 | revokePacket, | |
523 | sizeof(NVSP_MESSAGE), | |
524 | (ULONG_PTR)revokePacket, | |
525 | VmbusPacketTypeDataInBand, | |
526 | 0); | |
527 | // If we failed here, we might as well return and have a leak rather than continue and a bugchk | |
528 | if (ret != 0) | |
529 | { | |
530 | DPRINT_ERR(NETVSC, "unable to send revoke receive buffer to netvsp"); | |
531 | DPRINT_EXIT(NETVSC); | |
532 | return -1; | |
533 | } | |
534 | } | |
535 | ||
536 | // Teardown the gpadl on the vsp end | |
537 | if (NetDevice->ReceiveBufferGpadlHandle) | |
538 | { | |
539 | DPRINT_INFO(NETVSC, "Tearing down receive buffer's GPADL..."); | |
540 | ||
541 | ret = NetDevice->Device->Driver->VmbusChannelInterface.TeardownGpadl(NetDevice->Device, | |
542 | NetDevice->ReceiveBufferGpadlHandle); | |
543 | ||
544 | // If we failed here, we might as well return and have a leak rather than continue and a bugchk | |
545 | if (ret != 0) | |
546 | { | |
547 | DPRINT_ERR(NETVSC, "unable to teardown receive buffer's gpadl"); | |
548 | DPRINT_EXIT(NETVSC); | |
549 | return -1; | |
550 | } | |
551 | NetDevice->ReceiveBufferGpadlHandle = 0; | |
552 | } | |
553 | ||
554 | if (NetDevice->ReceiveBuffer) | |
555 | { | |
556 | DPRINT_INFO(NETVSC, "Freeing up receive buffer..."); | |
557 | ||
558 | // Free up the receive buffer | |
559 | PageFree(NetDevice->ReceiveBuffer, NetDevice->ReceiveBufferSize >> PAGE_SHIFT); | |
560 | NetDevice->ReceiveBuffer = NULL; | |
561 | } | |
562 | ||
563 | if (NetDevice->ReceiveSections) | |
564 | { | |
565 | MemFree(NetDevice->ReceiveSections); | |
566 | NetDevice->ReceiveSections = NULL; | |
567 | NetDevice->ReceiveSectionCount = 0; | |
568 | } | |
569 | ||
570 | DPRINT_EXIT(NETVSC); | |
571 | ||
572 | return ret; | |
573 | } | |
574 | ||
575 | ||
576 | ||
577 | ||
578 | static int | |
579 | NetVscDestroySendBuffer( | |
580 | NETVSC_DEVICE *NetDevice | |
581 | ) | |
582 | { | |
583 | NVSP_MESSAGE *revokePacket; | |
584 | int ret=0; | |
585 | ||
586 | ||
587 | DPRINT_ENTER(NETVSC); | |
588 | ||
589 | // If we got a section count, it means we received a SendReceiveBufferComplete msg | |
590 | // (ie sent NvspMessage1TypeSendReceiveBuffer msg) therefore, we need to send a revoke msg here | |
591 | if (NetDevice->SendSectionSize) | |
592 | { | |
593 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeRevokeSendBuffer..."); | |
594 | ||
595 | // Send the revoke send buffer | |
596 | revokePacket = &NetDevice->RevokePacket; | |
597 | memset(revokePacket, 0, sizeof(NVSP_MESSAGE)); | |
598 | ||
599 | revokePacket->Header.MessageType = NvspMessage1TypeRevokeSendBuffer; | |
600 | revokePacket->Messages.Version1Messages.RevokeSendBuffer.Id = NETVSC_SEND_BUFFER_ID; | |
601 | ||
602 | ret = NetDevice->Device->Driver->VmbusChannelInterface.SendPacket(NetDevice->Device, | |
603 | revokePacket, | |
604 | sizeof(NVSP_MESSAGE), | |
605 | (ULONG_PTR)revokePacket, | |
606 | VmbusPacketTypeDataInBand, | |
607 | 0); | |
608 | // If we failed here, we might as well return and have a leak rather than continue and a bugchk | |
609 | if (ret != 0) | |
610 | { | |
611 | DPRINT_ERR(NETVSC, "unable to send revoke send buffer to netvsp"); | |
612 | DPRINT_EXIT(NETVSC); | |
613 | return -1; | |
614 | } | |
615 | } | |
616 | ||
617 | // Teardown the gpadl on the vsp end | |
618 | if (NetDevice->SendBufferGpadlHandle) | |
619 | { | |
620 | DPRINT_INFO(NETVSC, "Tearing down send buffer's GPADL..."); | |
621 | ||
622 | ret = NetDevice->Device->Driver->VmbusChannelInterface.TeardownGpadl(NetDevice->Device, | |
623 | NetDevice->SendBufferGpadlHandle); | |
624 | ||
625 | // If we failed here, we might as well return and have a leak rather than continue and a bugchk | |
626 | if (ret != 0) | |
627 | { | |
628 | DPRINT_ERR(NETVSC, "unable to teardown send buffer's gpadl"); | |
629 | DPRINT_EXIT(NETVSC); | |
630 | return -1; | |
631 | } | |
632 | NetDevice->SendBufferGpadlHandle = 0; | |
633 | } | |
634 | ||
635 | if (NetDevice->SendBuffer) | |
636 | { | |
637 | DPRINT_INFO(NETVSC, "Freeing up send buffer..."); | |
638 | ||
639 | // Free up the receive buffer | |
640 | PageFree(NetDevice->SendBuffer, NetDevice->SendBufferSize >> PAGE_SHIFT); | |
641 | NetDevice->SendBuffer = NULL; | |
642 | } | |
643 | ||
644 | DPRINT_EXIT(NETVSC); | |
645 | ||
646 | return ret; | |
647 | } | |
648 | ||
649 | ||
650 | ||
651 | static int | |
652 | NetVscConnectToVsp( | |
653 | DEVICE_OBJECT *Device | |
654 | ) | |
655 | { | |
656 | int ret=0; | |
657 | NETVSC_DEVICE *netDevice; | |
658 | NVSP_MESSAGE *initPacket; | |
659 | int ndisVersion; | |
660 | ||
661 | DPRINT_ENTER(NETVSC); | |
662 | ||
663 | netDevice = GetOutboundNetDevice(Device); | |
664 | if (!netDevice) | |
665 | { | |
666 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
667 | DPRINT_EXIT(NETVSC); | |
668 | return -1; | |
669 | } | |
670 | ||
671 | initPacket = &netDevice->ChannelInitPacket; | |
672 | ||
673 | memset(initPacket, 0, sizeof(NVSP_MESSAGE)); | |
674 | initPacket->Header.MessageType = NvspMessageTypeInit; | |
675 | initPacket->Messages.InitMessages.Init.MinProtocolVersion = NVSP_MIN_PROTOCOL_VERSION; | |
676 | initPacket->Messages.InitMessages.Init.MaxProtocolVersion = NVSP_MAX_PROTOCOL_VERSION; | |
677 | ||
678 | DPRINT_INFO(NETVSC, "Sending NvspMessageTypeInit..."); | |
679 | ||
680 | // Send the init request | |
681 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
682 | initPacket, | |
683 | sizeof(NVSP_MESSAGE), | |
684 | (ULONG_PTR)initPacket, | |
685 | VmbusPacketTypeDataInBand, | |
686 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
687 | ||
688 | if( ret != 0) | |
689 | { | |
690 | DPRINT_ERR(NETVSC, "unable to send NvspMessageTypeInit"); | |
691 | goto Cleanup; | |
692 | } | |
693 | ||
694 | WaitEventWait(netDevice->ChannelInitEvent); | |
695 | ||
696 | // Now, check the response | |
697 | //ASSERT(initPacket->Messages.InitMessages.InitComplete.MaximumMdlChainLength <= MAX_MULTIPAGE_BUFFER_COUNT); | |
698 | DPRINT_INFO(NETVSC, "NvspMessageTypeInit status(%d) max mdl chain (%d)", | |
699 | initPacket->Messages.InitMessages.InitComplete.Status, | |
700 | initPacket->Messages.InitMessages.InitComplete.MaximumMdlChainLength); | |
701 | ||
702 | if (initPacket->Messages.InitMessages.InitComplete.Status != NvspStatusSuccess) | |
703 | { | |
704 | DPRINT_ERR(NETVSC, "unable to initialize with netvsp (status 0x%x)", initPacket->Messages.InitMessages.InitComplete.Status); | |
705 | ret = -1; | |
706 | goto Cleanup; | |
707 | } | |
708 | ||
709 | if (initPacket->Messages.InitMessages.InitComplete.NegotiatedProtocolVersion != NVSP_PROTOCOL_VERSION_1) | |
710 | { | |
711 | DPRINT_ERR(NETVSC, "unable to initialize with netvsp (version expected 1 got %d)", | |
712 | initPacket->Messages.InitMessages.InitComplete.NegotiatedProtocolVersion); | |
713 | ret = -1; | |
714 | goto Cleanup; | |
715 | } | |
716 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendNdisVersion..."); | |
717 | ||
718 | // Send the ndis version | |
719 | memset(initPacket, 0, sizeof(NVSP_MESSAGE)); | |
720 | ||
721 | ndisVersion = 0x00050000; | |
722 | ||
723 | initPacket->Header.MessageType = NvspMessage1TypeSendNdisVersion; | |
724 | initPacket->Messages.Version1Messages.SendNdisVersion.NdisMajorVersion = (ndisVersion & 0xFFFF0000) >> 16; | |
725 | initPacket->Messages.Version1Messages.SendNdisVersion.NdisMinorVersion = ndisVersion & 0xFFFF; | |
726 | ||
727 | // Send the init request | |
728 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
729 | initPacket, | |
730 | sizeof(NVSP_MESSAGE), | |
731 | (ULONG_PTR)initPacket, | |
732 | VmbusPacketTypeDataInBand, | |
733 | 0); | |
734 | if (ret != 0) | |
735 | { | |
736 | DPRINT_ERR(NETVSC, "unable to send NvspMessage1TypeSendNdisVersion"); | |
737 | ret = -1; | |
738 | goto Cleanup; | |
739 | } | |
740 | // | |
741 | // BUGBUG - We have to wait for the above msg since the netvsp uses KMCL which acknowledges packet (completion packet) | |
742 | // since our Vmbus always set the VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED flag | |
743 | //WaitEventWait(NetVscChannel->ChannelInitEvent); | |
744 | ||
745 | // Post the big receive buffer to NetVSP | |
746 | ret = NetVscInitializeReceiveBufferWithNetVsp(Device); | |
747 | if (ret == 0) | |
748 | { | |
749 | ret = NetVscInitializeSendBufferWithNetVsp(Device); | |
750 | } | |
751 | ||
752 | Cleanup: | |
753 | PutNetDevice(Device); | |
754 | DPRINT_EXIT(NETVSC); | |
755 | return ret; | |
756 | } | |
757 | ||
758 | static void | |
759 | NetVscDisconnectFromVsp( | |
760 | NETVSC_DEVICE *NetDevice | |
761 | ) | |
762 | { | |
763 | DPRINT_ENTER(NETVSC); | |
764 | ||
765 | NetVscDestroyReceiveBuffer(NetDevice); | |
766 | NetVscDestroySendBuffer(NetDevice); | |
767 | ||
768 | DPRINT_EXIT(NETVSC); | |
769 | } | |
770 | ||
771 | ||
772 | /*++ | |
773 | ||
774 | Name: | |
775 | NetVscOnDeviceAdd() | |
776 | ||
777 | Description: | |
778 | Callback when the device belonging to this driver is added | |
779 | ||
780 | --*/ | |
781 | int | |
782 | NetVscOnDeviceAdd( | |
783 | DEVICE_OBJECT *Device, | |
784 | void *AdditionalInfo | |
785 | ) | |
786 | { | |
787 | int ret=0; | |
788 | int i; | |
789 | ||
790 | NETVSC_DEVICE* netDevice; | |
791 | NETVSC_PACKET* packet; | |
792 | LIST_ENTRY *entry; | |
793 | ||
794 | NETVSC_DRIVER_OBJECT *netDriver = (NETVSC_DRIVER_OBJECT*) Device->Driver;; | |
795 | ||
796 | DPRINT_ENTER(NETVSC); | |
797 | ||
798 | netDevice = AllocNetDevice(Device); | |
799 | if (!netDevice) | |
800 | { | |
801 | ret = -1; | |
802 | goto Cleanup; | |
803 | } | |
804 | ||
805 | DPRINT_DBG(NETVSC, "netvsc channel object allocated - %p", netDevice); | |
806 | ||
807 | // Initialize the NetVSC channel extension | |
808 | netDevice->ReceiveBufferSize = NETVSC_RECEIVE_BUFFER_SIZE; | |
809 | netDevice->ReceivePacketListLock = SpinlockCreate(); | |
810 | ||
811 | netDevice->SendBufferSize = NETVSC_SEND_BUFFER_SIZE; | |
812 | ||
813 | INITIALIZE_LIST_HEAD(&netDevice->ReceivePacketList); | |
814 | ||
815 | for (i=0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++) | |
816 | { | |
817 | packet = MemAllocZeroed(sizeof(NETVSC_PACKET) + (NETVSC_RECEIVE_SG_COUNT* sizeof(PAGE_BUFFER))); | |
818 | if (!packet) | |
819 | { | |
820 | DPRINT_DBG(NETVSC, "unable to allocate netvsc pkts for receive pool (wanted %d got %d)", NETVSC_RECEIVE_PACKETLIST_COUNT, i); | |
821 | break; | |
822 | } | |
823 | ||
824 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->ListEntry); | |
825 | } | |
826 | netDevice->ChannelInitEvent = WaitEventCreate(); | |
827 | ||
828 | // Open the channel | |
829 | ret = Device->Driver->VmbusChannelInterface.Open(Device, | |
830 | netDriver->RingBufferSize, | |
831 | netDriver->RingBufferSize, | |
832 | NULL, 0, | |
833 | NetVscOnChannelCallback, | |
834 | Device | |
835 | ); | |
836 | ||
837 | if (ret != 0) | |
838 | { | |
839 | DPRINT_ERR(NETVSC, "unable to open channel: %d", ret); | |
840 | ret = -1; | |
841 | goto Cleanup; | |
842 | } | |
843 | ||
844 | // Channel is opened | |
845 | DPRINT_INFO(NETVSC, "*** NetVSC channel opened successfully! ***"); | |
846 | ||
847 | // Connect with the NetVsp | |
848 | ret = NetVscConnectToVsp(Device); | |
849 | if (ret != 0) | |
850 | { | |
851 | DPRINT_ERR(NETVSC, "unable to connect to NetVSP - %d", ret); | |
852 | ret = -1; | |
853 | goto Close; | |
854 | } | |
855 | ||
856 | DPRINT_INFO(NETVSC, "*** NetVSC channel handshake result - %d ***", ret); | |
857 | ||
858 | DPRINT_EXIT(NETVSC); | |
859 | return ret; | |
860 | ||
861 | Close: | |
862 | // Now, we can close the channel safely | |
863 | Device->Driver->VmbusChannelInterface.Close(Device); | |
864 | ||
865 | Cleanup: | |
866 | ||
867 | if (netDevice) | |
868 | { | |
869 | WaitEventClose(netDevice->ChannelInitEvent); | |
870 | ||
871 | while (!IsListEmpty(&netDevice->ReceivePacketList)) | |
872 | { | |
873 | entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList); | |
874 | packet = CONTAINING_RECORD(entry, NETVSC_PACKET, ListEntry); | |
875 | MemFree(packet); | |
876 | } | |
877 | ||
878 | SpinlockClose(netDevice->ReceivePacketListLock); | |
879 | ||
880 | ReleaseOutboundNetDevice(Device); | |
881 | ReleaseInboundNetDevice(Device); | |
882 | ||
883 | FreeNetDevice(netDevice); | |
884 | } | |
885 | ||
886 | DPRINT_EXIT(NETVSC); | |
887 | return ret; | |
888 | } | |
889 | ||
890 | ||
891 | /*++ | |
892 | ||
893 | Name: | |
894 | NetVscOnDeviceRemove() | |
895 | ||
896 | Description: | |
897 | Callback when the root bus device is removed | |
898 | ||
899 | --*/ | |
900 | int | |
901 | NetVscOnDeviceRemove( | |
902 | DEVICE_OBJECT *Device | |
903 | ) | |
904 | { | |
905 | NETVSC_DEVICE *netDevice; | |
906 | NETVSC_PACKET *netvscPacket; | |
907 | int ret=0; | |
908 | LIST_ENTRY *entry; | |
909 | ||
910 | DPRINT_ENTER(NETVSC); | |
911 | ||
912 | DPRINT_INFO(NETVSC, "Disabling outbound traffic on net device (%p)...", Device->Extension); | |
913 | ||
914 | // Stop outbound traffic ie sends and receives completions | |
915 | netDevice = ReleaseOutboundNetDevice(Device); | |
916 | if (!netDevice) | |
917 | { | |
918 | DPRINT_ERR(NETVSC, "No net device present!!"); | |
919 | return -1; | |
920 | } | |
921 | ||
922 | // Wait for all send completions | |
923 | while (netDevice->NumOutstandingSends) | |
924 | { | |
925 | DPRINT_INFO(NETVSC, "waiting for %d requests to complete...", netDevice->NumOutstandingSends); | |
926 | ||
927 | Sleep(100); | |
928 | } | |
929 | ||
930 | DPRINT_INFO(NETVSC, "Disconnecting from netvsp..."); | |
931 | ||
932 | NetVscDisconnectFromVsp(netDevice); | |
933 | ||
934 | DPRINT_INFO(NETVSC, "Disabling inbound traffic on net device (%p)...", Device->Extension); | |
935 | ||
936 | // Stop inbound traffic ie receives and sends completions | |
937 | netDevice = ReleaseInboundNetDevice(Device); | |
938 | ||
939 | // At this point, no one should be accessing netDevice except in here | |
940 | DPRINT_INFO(NETVSC, "net device (%p) safe to remove", netDevice); | |
941 | ||
942 | // Now, we can close the channel safely | |
943 | Device->Driver->VmbusChannelInterface.Close(Device); | |
944 | ||
945 | // Release all resources | |
946 | while (!IsListEmpty(&netDevice->ReceivePacketList)) | |
947 | { | |
948 | entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList); | |
949 | netvscPacket = CONTAINING_RECORD(entry, NETVSC_PACKET, ListEntry); | |
950 | ||
951 | MemFree(netvscPacket); | |
952 | } | |
953 | ||
954 | SpinlockClose(netDevice->ReceivePacketListLock); | |
955 | WaitEventClose(netDevice->ChannelInitEvent); | |
956 | FreeNetDevice(netDevice); | |
957 | ||
958 | DPRINT_EXIT(NETVSC); | |
959 | return ret; | |
960 | } | |
961 | ||
962 | ||
963 | ||
964 | /*++ | |
965 | ||
966 | Name: | |
967 | NetVscOnCleanup() | |
968 | ||
969 | Description: | |
970 | Perform any cleanup when the driver is removed | |
971 | ||
972 | --*/ | |
973 | void | |
974 | NetVscOnCleanup( | |
975 | DRIVER_OBJECT *drv | |
976 | ) | |
977 | { | |
978 | DPRINT_ENTER(NETVSC); | |
979 | ||
980 | DPRINT_EXIT(NETVSC); | |
981 | } | |
982 | ||
983 | static void | |
984 | NetVscOnSendCompletion( | |
985 | DEVICE_OBJECT *Device, | |
986 | VMPACKET_DESCRIPTOR *Packet | |
987 | ) | |
988 | { | |
989 | NETVSC_DEVICE* netDevice; | |
990 | NVSP_MESSAGE *nvspPacket; | |
991 | NETVSC_PACKET *nvscPacket; | |
992 | ||
993 | DPRINT_ENTER(NETVSC); | |
994 | ||
995 | netDevice = GetInboundNetDevice(Device); | |
996 | if (!netDevice) | |
997 | { | |
998 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
999 | DPRINT_EXIT(NETVSC); | |
1000 | return; | |
1001 | } | |
1002 | ||
1003 | nvspPacket = (NVSP_MESSAGE*)((ULONG_PTR)Packet + (Packet->DataOffset8 << 3)); | |
1004 | ||
1005 | DPRINT_DBG(NETVSC, "send completion packet - type %d", nvspPacket->Header.MessageType); | |
1006 | ||
1007 | if (nvspPacket->Header.MessageType == NvspMessageTypeInitComplete || | |
1008 | nvspPacket->Header.MessageType == NvspMessage1TypeSendReceiveBufferComplete || | |
1009 | nvspPacket->Header.MessageType == NvspMessage1TypeSendSendBufferComplete) | |
1010 | { | |
1011 | // Copy the response back | |
1012 | memcpy(&netDevice->ChannelInitPacket, nvspPacket, sizeof(NVSP_MESSAGE)); | |
1013 | WaitEventSet(netDevice->ChannelInitEvent); | |
1014 | } | |
1015 | else if (nvspPacket->Header.MessageType == NvspMessage1TypeSendRNDISPacketComplete) | |
1016 | { | |
1017 | // Get the send context | |
1018 | nvscPacket = (NETVSC_PACKET *)(ULONG_PTR)Packet->TransactionId; | |
1019 | ASSERT(nvscPacket); | |
1020 | ||
1021 | // Notify the layer above us | |
1022 | nvscPacket->Completion.Send.OnSendCompletion(nvscPacket->Completion.Send.SendCompletionContext); | |
1023 | ||
1024 | InterlockedDecrement(&netDevice->NumOutstandingSends); | |
1025 | } | |
1026 | else | |
1027 | { | |
1028 | DPRINT_ERR(NETVSC, "Unknown send completion packet type - %d received!!", nvspPacket->Header.MessageType); | |
1029 | } | |
1030 | ||
1031 | PutNetDevice(Device); | |
1032 | DPRINT_EXIT(NETVSC); | |
1033 | } | |
1034 | ||
1035 | ||
1036 | ||
1037 | static int | |
1038 | NetVscOnSend( | |
1039 | DEVICE_OBJECT *Device, | |
1040 | NETVSC_PACKET *Packet | |
1041 | ) | |
1042 | { | |
1043 | NETVSC_DEVICE* netDevice; | |
1044 | int ret=0; | |
1045 | ||
1046 | NVSP_MESSAGE sendMessage; | |
1047 | ||
1048 | DPRINT_ENTER(NETVSC); | |
1049 | ||
1050 | netDevice = GetOutboundNetDevice(Device); | |
1051 | if (!netDevice) | |
1052 | { | |
1053 | DPRINT_ERR(NETVSC, "net device (%p) shutting down...ignoring outbound packets", netDevice); | |
1054 | DPRINT_EXIT(NETVSC); | |
1055 | return -2; | |
1056 | } | |
1057 | ||
1058 | sendMessage.Header.MessageType = NvspMessage1TypeSendRNDISPacket; | |
1059 | if (Packet->IsDataPacket) | |
1060 | sendMessage.Messages.Version1Messages.SendRNDISPacket.ChannelType = 0;// 0 is RMC_DATA; | |
1061 | else | |
1062 | sendMessage.Messages.Version1Messages.SendRNDISPacket.ChannelType = 1;// 1 is RMC_CONTROL; | |
1063 | ||
1064 | // Not using send buffer section | |
1065 | sendMessage.Messages.Version1Messages.SendRNDISPacket.SendBufferSectionIndex = 0xFFFFFFFF; | |
1066 | sendMessage.Messages.Version1Messages.SendRNDISPacket.SendBufferSectionSize = 0; | |
1067 | ||
1068 | if (Packet->PageBufferCount) | |
1069 | { | |
1070 | ret = Device->Driver->VmbusChannelInterface.SendPacketPageBuffer(Device, | |
1071 | Packet->PageBuffers, | |
1072 | Packet->PageBufferCount, | |
1073 | &sendMessage, | |
1074 | sizeof(NVSP_MESSAGE), | |
1075 | (ULONG_PTR)Packet); | |
1076 | } | |
1077 | else | |
1078 | { | |
1079 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
1080 | &sendMessage, | |
1081 | sizeof(NVSP_MESSAGE), | |
1082 | (ULONG_PTR)Packet, | |
1083 | VmbusPacketTypeDataInBand, | |
1084 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
1085 | ||
1086 | } | |
1087 | ||
1088 | if (ret != 0) | |
1089 | { | |
1090 | DPRINT_ERR(NETVSC, "Unable to send packet %p ret %d", Packet, ret); | |
1091 | } | |
1092 | ||
1093 | InterlockedIncrement(&netDevice->NumOutstandingSends); | |
1094 | PutNetDevice(Device); | |
1095 | ||
1096 | DPRINT_EXIT(NETVSC); | |
1097 | return ret; | |
1098 | } | |
1099 | ||
1100 | ||
1101 | static void | |
1102 | NetVscOnReceive( | |
1103 | DEVICE_OBJECT *Device, | |
1104 | VMPACKET_DESCRIPTOR *Packet | |
1105 | ) | |
1106 | { | |
1107 | NETVSC_DEVICE* netDevice; | |
1108 | VMTRANSFER_PAGE_PACKET_HEADER *vmxferpagePacket; | |
1109 | NVSP_MESSAGE *nvspPacket; | |
1110 | NETVSC_PACKET *netvscPacket=NULL; | |
1111 | LIST_ENTRY* entry; | |
1112 | ULONG_PTR start; | |
1113 | ULONG_PTR end, endVirtual; | |
1114 | //NETVSC_DRIVER_OBJECT *netvscDriver; | |
1115 | XFERPAGE_PACKET *xferpagePacket=NULL; | |
1116 | LIST_ENTRY listHead; | |
1117 | ||
1118 | int i=0, j=0; | |
1119 | int count=0, bytesRemain=0; | |
1120 | ||
1121 | DPRINT_ENTER(NETVSC); | |
1122 | ||
1123 | netDevice = GetInboundNetDevice(Device); | |
1124 | if (!netDevice) | |
1125 | { | |
1126 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
1127 | DPRINT_EXIT(NETVSC); | |
1128 | return; | |
1129 | } | |
1130 | ||
1131 | // All inbound packets other than send completion should be xfer page packet | |
1132 | if (Packet->Type != VmbusPacketTypeDataUsingTransferPages) | |
1133 | { | |
1134 | DPRINT_ERR(NETVSC, "Unknown packet type received - %d", Packet->Type); | |
1135 | PutNetDevice(Device); | |
1136 | return; | |
1137 | } | |
1138 | ||
1139 | nvspPacket = (NVSP_MESSAGE*)((ULONG_PTR)Packet + (Packet->DataOffset8 << 3)); | |
1140 | ||
1141 | // Make sure this is a valid nvsp packet | |
1142 | if (nvspPacket->Header.MessageType != NvspMessage1TypeSendRNDISPacket ) | |
1143 | { | |
1144 | DPRINT_ERR(NETVSC, "Unknown nvsp packet type received - %d", nvspPacket->Header.MessageType); | |
1145 | PutNetDevice(Device); | |
1146 | return; | |
1147 | } | |
1148 | ||
1149 | DPRINT_DBG(NETVSC, "NVSP packet received - type %d", nvspPacket->Header.MessageType); | |
1150 | ||
1151 | vmxferpagePacket = (VMTRANSFER_PAGE_PACKET_HEADER*)Packet; | |
1152 | ||
1153 | if (vmxferpagePacket->TransferPageSetId != NETVSC_RECEIVE_BUFFER_ID) | |
1154 | { | |
1155 | DPRINT_ERR(NETVSC, "Invalid xfer page set id - expecting %x got %x", NETVSC_RECEIVE_BUFFER_ID, vmxferpagePacket->TransferPageSetId); | |
1156 | PutNetDevice(Device); | |
1157 | return; | |
1158 | } | |
1159 | ||
1160 | DPRINT_DBG(NETVSC, "xfer page - range count %d", vmxferpagePacket->RangeCount); | |
1161 | ||
1162 | INITIALIZE_LIST_HEAD(&listHead); | |
1163 | ||
1164 | // Grab free packets (range count + 1) to represent this xfer page packet. +1 to represent | |
1165 | // the xfer page packet itself. We grab it here so that we know exactly how many we can fulfil | |
1166 | SpinlockAcquire(netDevice->ReceivePacketListLock); | |
1167 | while (!IsListEmpty(&netDevice->ReceivePacketList)) | |
1168 | { | |
1169 | entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList); | |
1170 | netvscPacket = CONTAINING_RECORD(entry, NETVSC_PACKET, ListEntry); | |
1171 | ||
1172 | INSERT_TAIL_LIST(&listHead, &netvscPacket->ListEntry); | |
1173 | ||
1174 | if (++count == vmxferpagePacket->RangeCount + 1) | |
1175 | break; | |
1176 | } | |
1177 | SpinlockRelease(netDevice->ReceivePacketListLock); | |
1178 | ||
1179 | // We need at least 2 netvsc pkts (1 to represent the xfer page and at least 1 for the range) | |
1180 | // i.e. we can handled some of the xfer page packet ranges... | |
1181 | if (count < 2) | |
1182 | { | |
1183 | DPRINT_ERR(NETVSC, "Got only %d netvsc pkt...needed %d pkts. Dropping this xfer page packet completely!", count, vmxferpagePacket->RangeCount+1); | |
1184 | ||
1185 | // Return it to the freelist | |
1186 | SpinlockAcquire(netDevice->ReceivePacketListLock); | |
1187 | for (i=count; i != 0; i--) | |
1188 | { | |
1189 | entry = REMOVE_HEAD_LIST(&listHead); | |
1190 | netvscPacket = CONTAINING_RECORD(entry, NETVSC_PACKET, ListEntry); | |
1191 | ||
1192 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &netvscPacket->ListEntry); | |
1193 | } | |
1194 | SpinlockRelease(netDevice->ReceivePacketListLock); | |
1195 | ||
1196 | NetVscSendReceiveCompletion(Device, vmxferpagePacket->d.TransactionId); | |
1197 | ||
1198 | PutNetDevice(Device); | |
1199 | return; | |
1200 | } | |
1201 | ||
1202 | // Remove the 1st packet to represent the xfer page packet itself | |
1203 | entry = REMOVE_HEAD_LIST(&listHead); | |
1204 | xferpagePacket = CONTAINING_RECORD(entry, XFERPAGE_PACKET, ListEntry); | |
1205 | xferpagePacket->Count = count - 1; // This is how much we can satisfy | |
1206 | ASSERT(xferpagePacket->Count > 0 && xferpagePacket->Count <= vmxferpagePacket->RangeCount); | |
1207 | ||
1208 | if (xferpagePacket->Count != vmxferpagePacket->RangeCount) | |
1209 | { | |
1210 | DPRINT_INFO(NETVSC, "Needed %d netvsc pkts to satisy this xfer page...got %d", vmxferpagePacket->RangeCount, xferpagePacket->Count); | |
1211 | } | |
1212 | ||
1213 | // Each range represents 1 RNDIS pkt that contains 1 ethernet frame | |
1214 | for (i=0; i < (count - 1); i++) | |
1215 | { | |
1216 | entry = REMOVE_HEAD_LIST(&listHead); | |
1217 | netvscPacket = CONTAINING_RECORD(entry, NETVSC_PACKET, ListEntry); | |
1218 | ||
1219 | // Initialize the netvsc packet | |
1220 | netvscPacket->XferPagePacket = xferpagePacket; | |
1221 | netvscPacket->Completion.Recv.OnReceiveCompletion = NetVscOnReceiveCompletion; | |
1222 | netvscPacket->Completion.Recv.ReceiveCompletionContext = netvscPacket; | |
1223 | netvscPacket->Device = Device; | |
1224 | netvscPacket->Completion.Recv.ReceiveCompletionTid = vmxferpagePacket->d.TransactionId; // Save this so that we can send it back | |
1225 | ||
1226 | netvscPacket->TotalDataBufferLength = vmxferpagePacket->Ranges[i].ByteCount; | |
1227 | netvscPacket->PageBufferCount = 1; | |
1228 | ||
1229 | ASSERT(vmxferpagePacket->Ranges[i].ByteOffset + vmxferpagePacket->Ranges[i].ByteCount < netDevice->ReceiveBufferSize); | |
1230 | ||
1231 | netvscPacket->PageBuffers[0].Length = vmxferpagePacket->Ranges[i].ByteCount; | |
1232 | ||
1233 | start = GetPhysicalAddress((void*)((ULONG_PTR)netDevice->ReceiveBuffer + vmxferpagePacket->Ranges[i].ByteOffset)); | |
1234 | ||
1235 | netvscPacket->PageBuffers[0].Pfn = start >> PAGE_SHIFT; | |
1236 | endVirtual = (ULONG_PTR)netDevice->ReceiveBuffer | |
1237 | + vmxferpagePacket->Ranges[i].ByteOffset | |
1238 | + vmxferpagePacket->Ranges[i].ByteCount -1; | |
1239 | end = GetPhysicalAddress((void*)endVirtual); | |
1240 | ||
1241 | // Calculate the page relative offset | |
1242 | netvscPacket->PageBuffers[0].Offset = vmxferpagePacket->Ranges[i].ByteOffset & (PAGE_SIZE -1); | |
1243 | if ((end >> PAGE_SHIFT) != (start>>PAGE_SHIFT)) { | |
1244 | //Handle frame across multiple pages: | |
1245 | netvscPacket->PageBuffers[0].Length = | |
1246 | (netvscPacket->PageBuffers[0].Pfn <<PAGE_SHIFT) + PAGE_SIZE - start; | |
1247 | bytesRemain = netvscPacket->TotalDataBufferLength - netvscPacket->PageBuffers[0].Length; | |
1248 | for (j=1; j<NETVSC_PACKET_MAXPAGE; j++) { | |
1249 | netvscPacket->PageBuffers[j].Offset = 0; | |
1250 | if (bytesRemain <= PAGE_SIZE) { | |
1251 | netvscPacket->PageBuffers[j].Length = bytesRemain; | |
1252 | bytesRemain = 0; | |
1253 | } else { | |
1254 | netvscPacket->PageBuffers[j].Length = PAGE_SIZE; | |
1255 | bytesRemain -= PAGE_SIZE; | |
1256 | } | |
1257 | netvscPacket->PageBuffers[j].Pfn = | |
1258 | GetPhysicalAddress((void*)(endVirtual - bytesRemain)) >> PAGE_SHIFT; | |
1259 | netvscPacket->PageBufferCount++; | |
1260 | if (bytesRemain == 0) | |
1261 | break; | |
1262 | } | |
1263 | ASSERT(bytesRemain == 0); | |
1264 | } | |
1265 | DPRINT_DBG(NETVSC, "[%d] - (abs offset %u len %u) => (pfn %llx, offset %u, len %u)", | |
1266 | i, | |
1267 | vmxferpagePacket->Ranges[i].ByteOffset, | |
1268 | vmxferpagePacket->Ranges[i].ByteCount, | |
1269 | netvscPacket->PageBuffers[0].Pfn, | |
1270 | netvscPacket->PageBuffers[0].Offset, | |
1271 | netvscPacket->PageBuffers[0].Length); | |
1272 | ||
1273 | // Pass it to the upper layer | |
1274 | ((NETVSC_DRIVER_OBJECT*)Device->Driver)->OnReceiveCallback(Device, netvscPacket); | |
1275 | ||
1276 | NetVscOnReceiveCompletion(netvscPacket->Completion.Recv.ReceiveCompletionContext); | |
1277 | } | |
1278 | ||
1279 | ASSERT(IsListEmpty(&listHead)); | |
1280 | ||
1281 | PutNetDevice(Device); | |
1282 | DPRINT_EXIT(NETVSC); | |
1283 | } | |
1284 | ||
1285 | ||
1286 | static void | |
1287 | NetVscSendReceiveCompletion( | |
1288 | DEVICE_OBJECT *Device, | |
1289 | UINT64 TransactionId | |
1290 | ) | |
1291 | { | |
1292 | NVSP_MESSAGE recvcompMessage; | |
1293 | int retries=0; | |
1294 | int ret=0; | |
1295 | ||
1296 | DPRINT_DBG(NETVSC, "Sending receive completion pkt - %llx", TransactionId); | |
1297 | ||
1298 | recvcompMessage.Header.MessageType = NvspMessage1TypeSendRNDISPacketComplete; | |
1299 | ||
1300 | // FIXME: Pass in the status | |
1301 | recvcompMessage.Messages.Version1Messages.SendRNDISPacketComplete.Status = NvspStatusSuccess; | |
1302 | ||
1303 | retry_send_cmplt: | |
1304 | // Send the completion | |
1305 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
1306 | &recvcompMessage, | |
1307 | sizeof(NVSP_MESSAGE), | |
1308 | TransactionId, | |
1309 | VmbusPacketTypeCompletion, | |
1310 | 0); | |
1311 | if (ret == 0) // success | |
1312 | { | |
1313 | // no-op | |
1314 | } | |
1315 | else if (ret == -1) // no more room...wait a bit and attempt to retry 3 times | |
1316 | { | |
1317 | retries++; | |
1318 | DPRINT_ERR(NETVSC, "unable to send receive completion pkt (tid %llx)...retrying %d", TransactionId, retries); | |
1319 | ||
1320 | if (retries < 4) | |
1321 | { | |
1322 | Sleep(100); | |
1323 | goto retry_send_cmplt; | |
1324 | } | |
1325 | else | |
1326 | { | |
1327 | DPRINT_ERR(NETVSC, "unable to send receive completion pkt (tid %llx)...give up retrying", TransactionId); | |
1328 | } | |
1329 | } | |
1330 | else | |
1331 | { | |
1332 | DPRINT_ERR(NETVSC, "unable to send receive completion pkt - %llx", TransactionId); | |
1333 | } | |
1334 | } | |
1335 | ||
1336 | // | |
1337 | // Send a receive completion packet to RNDIS device (ie NetVsp) | |
1338 | // | |
1339 | static void | |
1340 | NetVscOnReceiveCompletion( | |
8282c400 | 1341 | void * Context) |
fceaf24a HJ |
1342 | { |
1343 | NETVSC_PACKET *packet = (NETVSC_PACKET*)Context; | |
1344 | DEVICE_OBJECT *device = (DEVICE_OBJECT*)packet->Device; | |
1345 | NETVSC_DEVICE* netDevice; | |
1346 | UINT64 transactionId=0; | |
1347 | BOOL fSendReceiveComp = FALSE; | |
1348 | ||
1349 | DPRINT_ENTER(NETVSC); | |
1350 | ||
1351 | ASSERT(packet->XferPagePacket); | |
1352 | ||
1353 | // Even though it seems logical to do a GetOutboundNetDevice() here to send out receive completion, | |
1354 | // we are using GetInboundNetDevice() since we may have disable outbound traffic already. | |
1355 | netDevice = GetInboundNetDevice(device); | |
1356 | if (!netDevice) | |
1357 | { | |
1358 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
1359 | DPRINT_EXIT(NETVSC); | |
1360 | return; | |
1361 | } | |
1362 | ||
1363 | // Overloading use of the lock. | |
1364 | SpinlockAcquire(netDevice->ReceivePacketListLock); | |
1365 | ||
1366 | ASSERT(packet->XferPagePacket->Count > 0); | |
1367 | packet->XferPagePacket->Count--; | |
1368 | ||
1369 | // Last one in the line that represent 1 xfer page packet. | |
1370 | // Return the xfer page packet itself to the freelist | |
1371 | if (packet->XferPagePacket->Count == 0) | |
1372 | { | |
1373 | fSendReceiveComp = TRUE; | |
1374 | transactionId = packet->Completion.Recv.ReceiveCompletionTid; | |
1375 | ||
1376 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->XferPagePacket->ListEntry); | |
1377 | } | |
1378 | ||
1379 | // Put the packet back | |
1380 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->ListEntry); | |
1381 | SpinlockRelease(netDevice->ReceivePacketListLock); | |
1382 | ||
1383 | // Send a receive completion for the xfer page packet | |
1384 | if (fSendReceiveComp) | |
1385 | { | |
1386 | NetVscSendReceiveCompletion(device, transactionId); | |
1387 | } | |
1388 | ||
1389 | PutNetDevice(device); | |
1390 | DPRINT_EXIT(NETVSC); | |
1391 | } | |
1392 | ||
1393 | ||
1394 | ||
1395 | void | |
1396 | NetVscOnChannelCallback( | |
8282c400 | 1397 | void * Context |
fceaf24a HJ |
1398 | ) |
1399 | { | |
1400 | const int netPacketSize=2048; | |
1401 | int ret=0; | |
1402 | DEVICE_OBJECT *device=(DEVICE_OBJECT*)Context; | |
1403 | NETVSC_DEVICE *netDevice; | |
1404 | ||
4d643114 | 1405 | u32 bytesRecvd; |
fceaf24a HJ |
1406 | UINT64 requestId; |
1407 | UCHAR packet[netPacketSize]; | |
1408 | VMPACKET_DESCRIPTOR *desc; | |
1409 | UCHAR *buffer=packet; | |
1410 | int bufferlen=netPacketSize; | |
1411 | ||
1412 | ||
1413 | DPRINT_ENTER(NETVSC); | |
1414 | ||
1415 | ASSERT(device); | |
1416 | ||
1417 | netDevice = GetInboundNetDevice(device); | |
1418 | if (!netDevice) | |
1419 | { | |
1420 | DPRINT_ERR(NETVSC, "net device (%p) shutting down...ignoring inbound packets", netDevice); | |
1421 | DPRINT_EXIT(NETVSC); | |
1422 | return; | |
1423 | } | |
1424 | ||
1425 | do | |
1426 | { | |
1427 | ret = device->Driver->VmbusChannelInterface.RecvPacketRaw(device, | |
1428 | buffer, | |
1429 | bufferlen, | |
1430 | &bytesRecvd, | |
1431 | &requestId); | |
1432 | ||
1433 | if (ret == 0) | |
1434 | { | |
1435 | if (bytesRecvd > 0) | |
1436 | { | |
1437 | DPRINT_DBG(NETVSC, "receive %d bytes, tid %llx", bytesRecvd, requestId); | |
1438 | ||
1439 | desc = (VMPACKET_DESCRIPTOR*)buffer; | |
1440 | switch (desc->Type) | |
1441 | { | |
1442 | case VmbusPacketTypeCompletion: | |
1443 | NetVscOnSendCompletion(device, desc); | |
1444 | break; | |
1445 | ||
1446 | case VmbusPacketTypeDataUsingTransferPages: | |
1447 | NetVscOnReceive(device, desc); | |
1448 | break; | |
1449 | ||
1450 | default: | |
1451 | DPRINT_ERR(NETVSC, "unhandled packet type %d, tid %llx len %d\n", desc->Type, requestId, bytesRecvd); | |
1452 | break; | |
1453 | } | |
1454 | ||
1455 | // reset | |
1456 | if (bufferlen > netPacketSize) | |
1457 | { | |
1458 | MemFree(buffer); | |
1459 | ||
1460 | buffer = packet; | |
1461 | bufferlen = netPacketSize; | |
1462 | } | |
1463 | } | |
1464 | else | |
1465 | { | |
1466 | //DPRINT_DBG(NETVSC, "nothing else to read..."); | |
1467 | ||
1468 | // reset | |
1469 | if (bufferlen > netPacketSize) | |
1470 | { | |
1471 | MemFree(buffer); | |
1472 | ||
1473 | buffer = packet; | |
1474 | bufferlen = netPacketSize; | |
1475 | } | |
1476 | ||
1477 | break; | |
1478 | } | |
1479 | } | |
1480 | else if (ret == -2) // Handle large packet | |
1481 | { | |
1482 | buffer = MemAllocAtomic(bytesRecvd); | |
1483 | if (buffer == NULL) | |
1484 | { | |
1485 | // Try again next time around | |
1486 | DPRINT_ERR(NETVSC, "unable to allocate buffer of size (%d)!!", bytesRecvd); | |
1487 | break; | |
1488 | } | |
1489 | ||
1490 | bufferlen = bytesRecvd; | |
1491 | } | |
1492 | else | |
1493 | { | |
1494 | ASSERT(0); | |
1495 | } | |
1496 | } while (1); | |
1497 | ||
1498 | PutNetDevice(device); | |
1499 | DPRINT_EXIT(NETVSC); | |
1500 | return; | |
1501 | } |