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Commit | Line | Data |
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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 | ||
5654e932 | 23 | #include <linux/kernel.h> |
0ffa63b0 | 24 | #include <linux/mm.h> |
b4362c9c | 25 | #include <linux/delay.h> |
c86f3e2a | 26 | #include "include/logging.h" |
fceaf24a HJ |
27 | #include "NetVsc.h" |
28 | #include "RndisFilter.h" | |
29 | ||
30 | ||
454f18a9 | 31 | /* Globals */ |
fceaf24a HJ |
32 | static const char* gDriverName="netvsc"; |
33 | ||
454f18a9 | 34 | /* {F8615163-DF3E-46c5-913F-F2D2F965ED0E} */ |
fceaf24a HJ |
35 | static const GUID gNetVscDeviceType={ |
36 | .Data = {0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E} | |
37 | }; | |
38 | ||
39 | ||
454f18a9 | 40 | /* Internal routines */ |
fceaf24a HJ |
41 | static int |
42 | NetVscOnDeviceAdd( | |
3d3b5518 | 43 | struct hv_device *Device, |
fceaf24a HJ |
44 | void *AdditionalInfo |
45 | ); | |
46 | ||
47 | static int | |
48 | NetVscOnDeviceRemove( | |
3d3b5518 | 49 | struct hv_device *Device |
fceaf24a HJ |
50 | ); |
51 | ||
52 | static void | |
53 | NetVscOnCleanup( | |
775ef25e | 54 | struct hv_driver *Driver |
fceaf24a HJ |
55 | ); |
56 | ||
57 | static void | |
58 | NetVscOnChannelCallback( | |
8282c400 | 59 | void * context |
fceaf24a HJ |
60 | ); |
61 | ||
62 | static int | |
63 | NetVscInitializeSendBufferWithNetVsp( | |
3d3b5518 | 64 | struct hv_device *Device |
fceaf24a HJ |
65 | ); |
66 | ||
67 | static int | |
68 | NetVscInitializeReceiveBufferWithNetVsp( | |
3d3b5518 | 69 | struct hv_device *Device |
fceaf24a HJ |
70 | ); |
71 | ||
72 | static int | |
73 | NetVscDestroySendBuffer( | |
d1af1db7 | 74 | struct NETVSC_DEVICE *NetDevice |
fceaf24a HJ |
75 | ); |
76 | ||
77 | static int | |
78 | NetVscDestroyReceiveBuffer( | |
d1af1db7 | 79 | struct NETVSC_DEVICE *NetDevice |
fceaf24a HJ |
80 | ); |
81 | ||
82 | static int | |
83 | NetVscConnectToVsp( | |
3d3b5518 | 84 | struct hv_device *Device |
fceaf24a HJ |
85 | ); |
86 | ||
87 | static void | |
88 | NetVscOnSendCompletion( | |
3d3b5518 | 89 | struct hv_device *Device, |
fceaf24a HJ |
90 | VMPACKET_DESCRIPTOR *Packet |
91 | ); | |
92 | ||
93 | static int | |
94 | NetVscOnSend( | |
3d3b5518 | 95 | struct hv_device *Device, |
4193d4f4 | 96 | struct hv_netvsc_packet *Packet |
fceaf24a HJ |
97 | ); |
98 | ||
99 | static void | |
100 | NetVscOnReceive( | |
3d3b5518 | 101 | struct hv_device *Device, |
fceaf24a HJ |
102 | VMPACKET_DESCRIPTOR *Packet |
103 | ); | |
104 | ||
105 | static void | |
106 | NetVscOnReceiveCompletion( | |
8282c400 | 107 | void * Context |
fceaf24a HJ |
108 | ); |
109 | ||
110 | static void | |
111 | NetVscSendReceiveCompletion( | |
3d3b5518 | 112 | struct hv_device *Device, |
59471438 | 113 | u64 TransactionId |
fceaf24a HJ |
114 | ); |
115 | ||
3d3b5518 | 116 | static inline struct NETVSC_DEVICE *AllocNetDevice(struct hv_device *Device) |
fceaf24a | 117 | { |
d1af1db7 | 118 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 119 | |
d1af1db7 | 120 | netDevice = kzalloc(sizeof(struct NETVSC_DEVICE), GFP_KERNEL); |
fceaf24a HJ |
121 | if (!netDevice) |
122 | return NULL; | |
123 | ||
454f18a9 | 124 | /* Set to 2 to allow both inbound and outbound traffic */ |
fceaf24a HJ |
125 | InterlockedCompareExchange(&netDevice->RefCount, 2, 0); |
126 | ||
127 | netDevice->Device = Device; | |
128 | Device->Extension = netDevice; | |
129 | ||
130 | return netDevice; | |
131 | } | |
132 | ||
d1af1db7 | 133 | static inline void FreeNetDevice(struct NETVSC_DEVICE *Device) |
fceaf24a HJ |
134 | { |
135 | ASSERT(Device->RefCount == 0); | |
136 | Device->Device->Extension = NULL; | |
8c69f52a | 137 | kfree(Device); |
fceaf24a HJ |
138 | } |
139 | ||
140 | ||
454f18a9 | 141 | /* Get the net device object iff exists and its refcount > 1 */ |
3d3b5518 | 142 | static inline struct NETVSC_DEVICE *GetOutboundNetDevice(struct hv_device *Device) |
fceaf24a | 143 | { |
d1af1db7 | 144 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 145 | |
d1af1db7 | 146 | netDevice = (struct NETVSC_DEVICE*)Device->Extension; |
fceaf24a HJ |
147 | if (netDevice && netDevice->RefCount > 1) |
148 | { | |
149 | InterlockedIncrement(&netDevice->RefCount); | |
150 | } | |
151 | else | |
152 | { | |
153 | netDevice = NULL; | |
154 | } | |
155 | ||
156 | return netDevice; | |
157 | } | |
158 | ||
454f18a9 | 159 | /* Get the net device object iff exists and its refcount > 0 */ |
3d3b5518 | 160 | static inline struct NETVSC_DEVICE *GetInboundNetDevice(struct hv_device *Device) |
fceaf24a | 161 | { |
d1af1db7 | 162 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 163 | |
d1af1db7 | 164 | netDevice = (struct NETVSC_DEVICE*)Device->Extension; |
fceaf24a HJ |
165 | if (netDevice && netDevice->RefCount) |
166 | { | |
167 | InterlockedIncrement(&netDevice->RefCount); | |
168 | } | |
169 | else | |
170 | { | |
171 | netDevice = NULL; | |
172 | } | |
173 | ||
174 | return netDevice; | |
175 | } | |
176 | ||
3d3b5518 | 177 | static inline void PutNetDevice(struct hv_device *Device) |
fceaf24a | 178 | { |
d1af1db7 | 179 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 180 | |
d1af1db7 | 181 | netDevice = (struct NETVSC_DEVICE*)Device->Extension; |
fceaf24a HJ |
182 | ASSERT(netDevice); |
183 | ||
184 | InterlockedDecrement(&netDevice->RefCount); | |
185 | } | |
186 | ||
3d3b5518 | 187 | static inline struct NETVSC_DEVICE *ReleaseOutboundNetDevice(struct hv_device *Device) |
fceaf24a | 188 | { |
d1af1db7 | 189 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 190 | |
d1af1db7 | 191 | netDevice = (struct NETVSC_DEVICE*)Device->Extension; |
fceaf24a HJ |
192 | if (netDevice == NULL) |
193 | return NULL; | |
194 | ||
454f18a9 | 195 | /* Busy wait until the ref drop to 2, then set it to 1 */ |
fceaf24a HJ |
196 | while (InterlockedCompareExchange(&netDevice->RefCount, 1, 2) != 2) |
197 | { | |
b4362c9c | 198 | udelay(100); |
fceaf24a HJ |
199 | } |
200 | ||
201 | return netDevice; | |
202 | } | |
203 | ||
3d3b5518 | 204 | static inline struct NETVSC_DEVICE *ReleaseInboundNetDevice(struct hv_device *Device) |
fceaf24a | 205 | { |
d1af1db7 | 206 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 207 | |
d1af1db7 | 208 | netDevice = (struct NETVSC_DEVICE*)Device->Extension; |
fceaf24a HJ |
209 | if (netDevice == NULL) |
210 | return NULL; | |
211 | ||
454f18a9 | 212 | /* Busy wait until the ref drop to 1, then set it to 0 */ |
fceaf24a HJ |
213 | while (InterlockedCompareExchange(&netDevice->RefCount, 0, 1) != 1) |
214 | { | |
b4362c9c | 215 | udelay(100); |
fceaf24a HJ |
216 | } |
217 | ||
218 | Device->Extension = NULL; | |
219 | return netDevice; | |
220 | } | |
221 | ||
222 | /*++; | |
223 | ||
224 | ||
225 | Name: | |
226 | NetVscInitialize() | |
227 | ||
228 | Description: | |
229 | Main entry point | |
230 | ||
231 | --*/ | |
232 | int | |
233 | NetVscInitialize( | |
775ef25e | 234 | struct hv_driver *drv |
fceaf24a HJ |
235 | ) |
236 | { | |
237 | NETVSC_DRIVER_OBJECT* driver = (NETVSC_DRIVER_OBJECT*)drv; | |
238 | int ret=0; | |
239 | ||
240 | DPRINT_ENTER(NETVSC); | |
241 | ||
4193d4f4 NP |
242 | DPRINT_DBG(NETVSC, "sizeof(struct hv_netvsc_packet)=%zd, sizeof(NVSP_MESSAGE)=%zd, sizeof(VMTRANSFER_PAGE_PACKET_HEADER)=%zd", |
243 | sizeof(struct hv_netvsc_packet), sizeof(NVSP_MESSAGE), sizeof(VMTRANSFER_PAGE_PACKET_HEADER)); | |
fceaf24a | 244 | |
454f18a9 | 245 | /* Make sure we are at least 2 pages since 1 page is used for control */ |
fceaf24a HJ |
246 | ASSERT(driver->RingBufferSize >= (PAGE_SIZE << 1)); |
247 | ||
248 | drv->name = gDriverName; | |
249 | memcpy(&drv->deviceType, &gNetVscDeviceType, sizeof(GUID)); | |
250 | ||
454f18a9 | 251 | /* Make sure it is set by the caller */ |
fceaf24a HJ |
252 | ASSERT(driver->OnReceiveCallback); |
253 | ASSERT(driver->OnLinkStatusChanged); | |
254 | ||
454f18a9 | 255 | /* Setup the dispatch table */ |
fceaf24a HJ |
256 | driver->Base.OnDeviceAdd = NetVscOnDeviceAdd; |
257 | driver->Base.OnDeviceRemove = NetVscOnDeviceRemove; | |
258 | driver->Base.OnCleanup = NetVscOnCleanup; | |
259 | ||
260 | driver->OnSend = NetVscOnSend; | |
261 | ||
262 | RndisFilterInit(driver); | |
263 | ||
264 | DPRINT_EXIT(NETVSC); | |
265 | ||
266 | return ret; | |
267 | } | |
268 | ||
269 | static int | |
270 | NetVscInitializeReceiveBufferWithNetVsp( | |
3d3b5518 | 271 | struct hv_device *Device |
fceaf24a HJ |
272 | ) |
273 | { | |
274 | int ret=0; | |
d1af1db7 | 275 | struct NETVSC_DEVICE *netDevice; |
fceaf24a HJ |
276 | NVSP_MESSAGE *initPacket; |
277 | ||
278 | DPRINT_ENTER(NETVSC); | |
279 | ||
280 | netDevice = GetOutboundNetDevice(Device); | |
281 | if (!netDevice) | |
282 | { | |
283 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
284 | DPRINT_EXIT(NETVSC); | |
285 | return -1; | |
286 | } | |
287 | ASSERT(netDevice->ReceiveBufferSize > 0); | |
454f18a9 | 288 | ASSERT((netDevice->ReceiveBufferSize & (PAGE_SIZE-1)) == 0); /* page-size grandularity */ |
fceaf24a HJ |
289 | |
290 | netDevice->ReceiveBuffer = PageAlloc(netDevice->ReceiveBufferSize >> PAGE_SHIFT); | |
291 | if (!netDevice->ReceiveBuffer) | |
292 | { | |
293 | DPRINT_ERR(NETVSC, "unable to allocate receive buffer of size %d", netDevice->ReceiveBufferSize); | |
294 | ret = -1; | |
295 | goto Cleanup; | |
296 | } | |
454f18a9 | 297 | ASSERT(((unsigned long)netDevice->ReceiveBuffer & (PAGE_SIZE-1)) == 0); /* page-aligned buffer */ |
fceaf24a HJ |
298 | |
299 | DPRINT_INFO(NETVSC, "Establishing receive buffer's GPADL..."); | |
300 | ||
454f18a9 BP |
301 | /* |
302 | * Establish the gpadl handle for this buffer on this | |
303 | * channel. Note: This call uses the vmbus connection rather | |
304 | * than the channel to establish the gpadl handle. | |
305 | */ | |
fceaf24a HJ |
306 | ret = Device->Driver->VmbusChannelInterface.EstablishGpadl(Device, |
307 | netDevice->ReceiveBuffer, | |
308 | netDevice->ReceiveBufferSize, | |
309 | &netDevice->ReceiveBufferGpadlHandle); | |
310 | ||
311 | if (ret != 0) | |
312 | { | |
313 | DPRINT_ERR(NETVSC, "unable to establish receive buffer's gpadl"); | |
314 | goto Cleanup; | |
315 | } | |
316 | ||
454f18a9 | 317 | /* WaitEventWait(ext->ChannelInitEvent); */ |
fceaf24a | 318 | |
454f18a9 | 319 | /* Notify the NetVsp of the gpadl handle */ |
fceaf24a HJ |
320 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendReceiveBuffer..."); |
321 | ||
322 | initPacket = &netDevice->ChannelInitPacket; | |
323 | ||
324 | memset(initPacket, 0, sizeof(NVSP_MESSAGE)); | |
325 | ||
326 | initPacket->Header.MessageType = NvspMessage1TypeSendReceiveBuffer; | |
327 | initPacket->Messages.Version1Messages.SendReceiveBuffer.GpadlHandle = netDevice->ReceiveBufferGpadlHandle; | |
328 | initPacket->Messages.Version1Messages.SendReceiveBuffer.Id = NETVSC_RECEIVE_BUFFER_ID; | |
329 | ||
454f18a9 | 330 | /* Send the gpadl notification request */ |
fceaf24a HJ |
331 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
332 | initPacket, | |
333 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 334 | (unsigned long)initPacket, |
fceaf24a HJ |
335 | VmbusPacketTypeDataInBand, |
336 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
337 | if (ret != 0) | |
338 | { | |
339 | DPRINT_ERR(NETVSC, "unable to send receive buffer's gpadl to netvsp"); | |
340 | goto Cleanup; | |
341 | } | |
342 | ||
343 | WaitEventWait(netDevice->ChannelInitEvent); | |
344 | ||
454f18a9 | 345 | /* Check the response */ |
fceaf24a HJ |
346 | if (initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Status != NvspStatusSuccess) |
347 | { | |
348 | DPRINT_ERR(NETVSC, | |
349 | "Unable to complete receive buffer initialzation with NetVsp - status %d", | |
350 | initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Status); | |
351 | ret = -1; | |
352 | goto Cleanup; | |
353 | } | |
354 | ||
454f18a9 | 355 | /* Parse the response */ |
fceaf24a HJ |
356 | ASSERT(netDevice->ReceiveSectionCount == 0); |
357 | ASSERT(netDevice->ReceiveSections == NULL); | |
358 | ||
359 | netDevice->ReceiveSectionCount = initPacket->Messages.Version1Messages.SendReceiveBufferComplete.NumSections; | |
360 | ||
e40d37cc | 361 | netDevice->ReceiveSections = kmalloc(netDevice->ReceiveSectionCount * sizeof(NVSP_1_RECEIVE_BUFFER_SECTION), GFP_KERNEL); |
fceaf24a HJ |
362 | if (netDevice->ReceiveSections == NULL) |
363 | { | |
364 | ret = -1; | |
365 | goto Cleanup; | |
366 | } | |
367 | ||
368 | memcpy(netDevice->ReceiveSections, | |
369 | initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Sections, | |
370 | netDevice->ReceiveSectionCount * sizeof(NVSP_1_RECEIVE_BUFFER_SECTION)); | |
371 | ||
372 | DPRINT_INFO(NETVSC, | |
373 | "Receive sections info (count %d, offset %d, endoffset %d, suballoc size %d, num suballocs %d)", | |
374 | netDevice->ReceiveSectionCount, netDevice->ReceiveSections[0].Offset, netDevice->ReceiveSections[0].EndOffset, | |
375 | netDevice->ReceiveSections[0].SubAllocationSize, netDevice->ReceiveSections[0].NumSubAllocations); | |
376 | ||
377 | ||
454f18a9 | 378 | /* For 1st release, there should only be 1 section that represents the entire receive buffer */ |
fceaf24a HJ |
379 | if (netDevice->ReceiveSectionCount != 1 || |
380 | netDevice->ReceiveSections->Offset != 0 ) | |
381 | { | |
382 | ret = -1; | |
383 | goto Cleanup; | |
384 | } | |
385 | ||
386 | goto Exit; | |
387 | ||
388 | Cleanup: | |
389 | NetVscDestroyReceiveBuffer(netDevice); | |
390 | ||
391 | Exit: | |
392 | PutNetDevice(Device); | |
393 | DPRINT_EXIT(NETVSC); | |
394 | return ret; | |
395 | } | |
396 | ||
397 | ||
398 | static int | |
399 | NetVscInitializeSendBufferWithNetVsp( | |
3d3b5518 | 400 | struct hv_device *Device |
fceaf24a HJ |
401 | ) |
402 | { | |
403 | int ret=0; | |
d1af1db7 | 404 | struct NETVSC_DEVICE *netDevice; |
fceaf24a HJ |
405 | NVSP_MESSAGE *initPacket; |
406 | ||
407 | DPRINT_ENTER(NETVSC); | |
408 | ||
409 | netDevice = GetOutboundNetDevice(Device); | |
410 | if (!netDevice) | |
411 | { | |
412 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
413 | DPRINT_EXIT(NETVSC); | |
414 | return -1; | |
415 | } | |
416 | ASSERT(netDevice->SendBufferSize > 0); | |
454f18a9 | 417 | ASSERT((netDevice->SendBufferSize & (PAGE_SIZE-1)) == 0); /* page-size grandularity */ |
fceaf24a HJ |
418 | |
419 | netDevice->SendBuffer = PageAlloc(netDevice->SendBufferSize >> PAGE_SHIFT); | |
420 | if (!netDevice->SendBuffer) | |
421 | { | |
422 | DPRINT_ERR(NETVSC, "unable to allocate send buffer of size %d", netDevice->SendBufferSize); | |
423 | ret = -1; | |
424 | goto Cleanup; | |
425 | } | |
454f18a9 | 426 | ASSERT(((unsigned long)netDevice->SendBuffer & (PAGE_SIZE-1)) == 0); /* page-aligned buffer */ |
fceaf24a HJ |
427 | |
428 | DPRINT_INFO(NETVSC, "Establishing send buffer's GPADL..."); | |
429 | ||
454f18a9 BP |
430 | /* |
431 | * Establish the gpadl handle for this buffer on this | |
432 | * channel. Note: This call uses the vmbus connection rather | |
433 | * than the channel to establish the gpadl handle. | |
434 | */ | |
fceaf24a | 435 | ret = Device->Driver->VmbusChannelInterface.EstablishGpadl(Device, |
454f18a9 BP |
436 | netDevice->SendBuffer, |
437 | netDevice->SendBufferSize, | |
438 | &netDevice->SendBufferGpadlHandle); | |
fceaf24a HJ |
439 | |
440 | if (ret != 0) | |
441 | { | |
442 | DPRINT_ERR(NETVSC, "unable to establish send buffer's gpadl"); | |
443 | goto Cleanup; | |
444 | } | |
445 | ||
454f18a9 | 446 | /* WaitEventWait(ext->ChannelInitEvent); */ |
fceaf24a | 447 | |
454f18a9 | 448 | /* Notify the NetVsp of the gpadl handle */ |
fceaf24a HJ |
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 | ||
454f18a9 | 459 | /* Send the gpadl notification request */ |
fceaf24a HJ |
460 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
461 | initPacket, | |
462 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 463 | (unsigned long)initPacket, |
fceaf24a HJ |
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 | ||
454f18a9 | 474 | /* Check the response */ |
fceaf24a HJ |
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( | |
d1af1db7 | 499 | struct NETVSC_DEVICE *NetDevice |
fceaf24a HJ |
500 | ) |
501 | { | |
502 | NVSP_MESSAGE *revokePacket; | |
503 | int ret=0; | |
504 | ||
505 | ||
506 | DPRINT_ENTER(NETVSC); | |
507 | ||
454f18a9 BP |
508 | /* |
509 | * If we got a section count, it means we received a | |
510 | * SendReceiveBufferComplete msg (ie sent | |
511 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
512 | * to send a revoke msg here | |
513 | */ | |
fceaf24a HJ |
514 | if (NetDevice->ReceiveSectionCount) |
515 | { | |
516 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeRevokeReceiveBuffer..."); | |
517 | ||
454f18a9 | 518 | /* Send the revoke receive buffer */ |
fceaf24a HJ |
519 | revokePacket = &NetDevice->RevokePacket; |
520 | memset(revokePacket, 0, sizeof(NVSP_MESSAGE)); | |
521 | ||
522 | revokePacket->Header.MessageType = NvspMessage1TypeRevokeReceiveBuffer; | |
523 | revokePacket->Messages.Version1Messages.RevokeReceiveBuffer.Id = NETVSC_RECEIVE_BUFFER_ID; | |
524 | ||
525 | ret = NetDevice->Device->Driver->VmbusChannelInterface.SendPacket(NetDevice->Device, | |
526 | revokePacket, | |
527 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 528 | (unsigned long)revokePacket, |
fceaf24a HJ |
529 | VmbusPacketTypeDataInBand, |
530 | 0); | |
454f18a9 BP |
531 | /* |
532 | * If we failed here, we might as well return and | |
533 | * have a leak rather than continue and a bugchk | |
534 | */ | |
fceaf24a HJ |
535 | if (ret != 0) |
536 | { | |
537 | DPRINT_ERR(NETVSC, "unable to send revoke receive buffer to netvsp"); | |
538 | DPRINT_EXIT(NETVSC); | |
539 | return -1; | |
540 | } | |
541 | } | |
542 | ||
454f18a9 | 543 | /* Teardown the gpadl on the vsp end */ |
fceaf24a HJ |
544 | if (NetDevice->ReceiveBufferGpadlHandle) |
545 | { | |
546 | DPRINT_INFO(NETVSC, "Tearing down receive buffer's GPADL..."); | |
547 | ||
548 | ret = NetDevice->Device->Driver->VmbusChannelInterface.TeardownGpadl(NetDevice->Device, | |
549 | NetDevice->ReceiveBufferGpadlHandle); | |
550 | ||
454f18a9 | 551 | /* If we failed here, we might as well return and have a leak rather than continue and a bugchk */ |
fceaf24a HJ |
552 | if (ret != 0) |
553 | { | |
554 | DPRINT_ERR(NETVSC, "unable to teardown receive buffer's gpadl"); | |
555 | DPRINT_EXIT(NETVSC); | |
556 | return -1; | |
557 | } | |
558 | NetDevice->ReceiveBufferGpadlHandle = 0; | |
559 | } | |
560 | ||
561 | if (NetDevice->ReceiveBuffer) | |
562 | { | |
563 | DPRINT_INFO(NETVSC, "Freeing up receive buffer..."); | |
564 | ||
454f18a9 | 565 | /* Free up the receive buffer */ |
fceaf24a HJ |
566 | PageFree(NetDevice->ReceiveBuffer, NetDevice->ReceiveBufferSize >> PAGE_SHIFT); |
567 | NetDevice->ReceiveBuffer = NULL; | |
568 | } | |
569 | ||
570 | if (NetDevice->ReceiveSections) | |
571 | { | |
8c69f52a | 572 | kfree(NetDevice->ReceiveSections); |
fceaf24a HJ |
573 | NetDevice->ReceiveSections = NULL; |
574 | NetDevice->ReceiveSectionCount = 0; | |
575 | } | |
576 | ||
577 | DPRINT_EXIT(NETVSC); | |
578 | ||
579 | return ret; | |
580 | } | |
581 | ||
582 | ||
583 | ||
584 | ||
585 | static int | |
586 | NetVscDestroySendBuffer( | |
d1af1db7 | 587 | struct NETVSC_DEVICE *NetDevice |
fceaf24a HJ |
588 | ) |
589 | { | |
590 | NVSP_MESSAGE *revokePacket; | |
591 | int ret=0; | |
592 | ||
593 | ||
594 | DPRINT_ENTER(NETVSC); | |
595 | ||
454f18a9 BP |
596 | /* |
597 | * If we got a section count, it means we received a | |
598 | * SendReceiveBufferComplete msg (ie sent | |
599 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
600 | * to send a revoke msg here | |
601 | */ | |
fceaf24a HJ |
602 | if (NetDevice->SendSectionSize) |
603 | { | |
604 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeRevokeSendBuffer..."); | |
605 | ||
454f18a9 | 606 | /* Send the revoke send buffer */ |
fceaf24a HJ |
607 | revokePacket = &NetDevice->RevokePacket; |
608 | memset(revokePacket, 0, sizeof(NVSP_MESSAGE)); | |
609 | ||
610 | revokePacket->Header.MessageType = NvspMessage1TypeRevokeSendBuffer; | |
611 | revokePacket->Messages.Version1Messages.RevokeSendBuffer.Id = NETVSC_SEND_BUFFER_ID; | |
612 | ||
613 | ret = NetDevice->Device->Driver->VmbusChannelInterface.SendPacket(NetDevice->Device, | |
614 | revokePacket, | |
615 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 616 | (unsigned long)revokePacket, |
fceaf24a HJ |
617 | VmbusPacketTypeDataInBand, |
618 | 0); | |
454f18a9 | 619 | /* If we failed here, we might as well return and have a leak rather than continue and a bugchk */ |
fceaf24a HJ |
620 | if (ret != 0) |
621 | { | |
622 | DPRINT_ERR(NETVSC, "unable to send revoke send buffer to netvsp"); | |
623 | DPRINT_EXIT(NETVSC); | |
624 | return -1; | |
625 | } | |
626 | } | |
627 | ||
454f18a9 | 628 | /* Teardown the gpadl on the vsp end */ |
fceaf24a HJ |
629 | if (NetDevice->SendBufferGpadlHandle) |
630 | { | |
631 | DPRINT_INFO(NETVSC, "Tearing down send buffer's GPADL..."); | |
632 | ||
633 | ret = NetDevice->Device->Driver->VmbusChannelInterface.TeardownGpadl(NetDevice->Device, | |
634 | NetDevice->SendBufferGpadlHandle); | |
635 | ||
454f18a9 | 636 | /* If we failed here, we might as well return and have a leak rather than continue and a bugchk */ |
fceaf24a HJ |
637 | if (ret != 0) |
638 | { | |
639 | DPRINT_ERR(NETVSC, "unable to teardown send buffer's gpadl"); | |
640 | DPRINT_EXIT(NETVSC); | |
641 | return -1; | |
642 | } | |
643 | NetDevice->SendBufferGpadlHandle = 0; | |
644 | } | |
645 | ||
646 | if (NetDevice->SendBuffer) | |
647 | { | |
648 | DPRINT_INFO(NETVSC, "Freeing up send buffer..."); | |
649 | ||
454f18a9 | 650 | /* Free up the receive buffer */ |
fceaf24a HJ |
651 | PageFree(NetDevice->SendBuffer, NetDevice->SendBufferSize >> PAGE_SHIFT); |
652 | NetDevice->SendBuffer = NULL; | |
653 | } | |
654 | ||
655 | DPRINT_EXIT(NETVSC); | |
656 | ||
657 | return ret; | |
658 | } | |
659 | ||
660 | ||
661 | ||
662 | static int | |
663 | NetVscConnectToVsp( | |
3d3b5518 | 664 | struct hv_device *Device |
fceaf24a HJ |
665 | ) |
666 | { | |
667 | int ret=0; | |
d1af1db7 | 668 | struct NETVSC_DEVICE *netDevice; |
fceaf24a HJ |
669 | NVSP_MESSAGE *initPacket; |
670 | int ndisVersion; | |
671 | ||
672 | DPRINT_ENTER(NETVSC); | |
673 | ||
674 | netDevice = GetOutboundNetDevice(Device); | |
675 | if (!netDevice) | |
676 | { | |
677 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
678 | DPRINT_EXIT(NETVSC); | |
679 | return -1; | |
680 | } | |
681 | ||
682 | initPacket = &netDevice->ChannelInitPacket; | |
683 | ||
684 | memset(initPacket, 0, sizeof(NVSP_MESSAGE)); | |
685 | initPacket->Header.MessageType = NvspMessageTypeInit; | |
686 | initPacket->Messages.InitMessages.Init.MinProtocolVersion = NVSP_MIN_PROTOCOL_VERSION; | |
687 | initPacket->Messages.InitMessages.Init.MaxProtocolVersion = NVSP_MAX_PROTOCOL_VERSION; | |
688 | ||
689 | DPRINT_INFO(NETVSC, "Sending NvspMessageTypeInit..."); | |
690 | ||
454f18a9 | 691 | /* Send the init request */ |
fceaf24a HJ |
692 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
693 | initPacket, | |
694 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 695 | (unsigned long)initPacket, |
fceaf24a HJ |
696 | VmbusPacketTypeDataInBand, |
697 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
698 | ||
699 | if( ret != 0) | |
700 | { | |
701 | DPRINT_ERR(NETVSC, "unable to send NvspMessageTypeInit"); | |
702 | goto Cleanup; | |
703 | } | |
704 | ||
705 | WaitEventWait(netDevice->ChannelInitEvent); | |
706 | ||
454f18a9 BP |
707 | /* Now, check the response */ |
708 | /* ASSERT(initPacket->Messages.InitMessages.InitComplete.MaximumMdlChainLength <= MAX_MULTIPAGE_BUFFER_COUNT); */ | |
fceaf24a HJ |
709 | DPRINT_INFO(NETVSC, "NvspMessageTypeInit status(%d) max mdl chain (%d)", |
710 | initPacket->Messages.InitMessages.InitComplete.Status, | |
711 | initPacket->Messages.InitMessages.InitComplete.MaximumMdlChainLength); | |
712 | ||
713 | if (initPacket->Messages.InitMessages.InitComplete.Status != NvspStatusSuccess) | |
714 | { | |
715 | DPRINT_ERR(NETVSC, "unable to initialize with netvsp (status 0x%x)", initPacket->Messages.InitMessages.InitComplete.Status); | |
716 | ret = -1; | |
717 | goto Cleanup; | |
718 | } | |
719 | ||
720 | if (initPacket->Messages.InitMessages.InitComplete.NegotiatedProtocolVersion != NVSP_PROTOCOL_VERSION_1) | |
721 | { | |
722 | DPRINT_ERR(NETVSC, "unable to initialize with netvsp (version expected 1 got %d)", | |
723 | initPacket->Messages.InitMessages.InitComplete.NegotiatedProtocolVersion); | |
724 | ret = -1; | |
725 | goto Cleanup; | |
726 | } | |
727 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendNdisVersion..."); | |
728 | ||
454f18a9 | 729 | /* Send the ndis version */ |
fceaf24a HJ |
730 | memset(initPacket, 0, sizeof(NVSP_MESSAGE)); |
731 | ||
732 | ndisVersion = 0x00050000; | |
733 | ||
734 | initPacket->Header.MessageType = NvspMessage1TypeSendNdisVersion; | |
735 | initPacket->Messages.Version1Messages.SendNdisVersion.NdisMajorVersion = (ndisVersion & 0xFFFF0000) >> 16; | |
736 | initPacket->Messages.Version1Messages.SendNdisVersion.NdisMinorVersion = ndisVersion & 0xFFFF; | |
737 | ||
454f18a9 | 738 | /* Send the init request */ |
fceaf24a HJ |
739 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
740 | initPacket, | |
741 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 742 | (unsigned long)initPacket, |
fceaf24a HJ |
743 | VmbusPacketTypeDataInBand, |
744 | 0); | |
745 | if (ret != 0) | |
746 | { | |
747 | DPRINT_ERR(NETVSC, "unable to send NvspMessage1TypeSendNdisVersion"); | |
748 | ret = -1; | |
749 | goto Cleanup; | |
750 | } | |
454f18a9 BP |
751 | /* |
752 | * BUGBUG - We have to wait for the above msg since the | |
753 | * netvsp uses KMCL which acknowledges packet (completion | |
754 | * packet) since our Vmbus always set the | |
755 | * VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED flag | |
756 | */ | |
757 | /* WaitEventWait(NetVscChannel->ChannelInitEvent); */ | |
758 | ||
759 | /* Post the big receive buffer to NetVSP */ | |
fceaf24a HJ |
760 | ret = NetVscInitializeReceiveBufferWithNetVsp(Device); |
761 | if (ret == 0) | |
762 | { | |
763 | ret = NetVscInitializeSendBufferWithNetVsp(Device); | |
764 | } | |
765 | ||
766 | Cleanup: | |
767 | PutNetDevice(Device); | |
768 | DPRINT_EXIT(NETVSC); | |
769 | return ret; | |
770 | } | |
771 | ||
772 | static void | |
773 | NetVscDisconnectFromVsp( | |
d1af1db7 | 774 | struct NETVSC_DEVICE *NetDevice |
fceaf24a HJ |
775 | ) |
776 | { | |
777 | DPRINT_ENTER(NETVSC); | |
778 | ||
779 | NetVscDestroyReceiveBuffer(NetDevice); | |
780 | NetVscDestroySendBuffer(NetDevice); | |
781 | ||
782 | DPRINT_EXIT(NETVSC); | |
783 | } | |
784 | ||
785 | ||
786 | /*++ | |
787 | ||
788 | Name: | |
789 | NetVscOnDeviceAdd() | |
790 | ||
791 | Description: | |
792 | Callback when the device belonging to this driver is added | |
793 | ||
794 | --*/ | |
bd1de709 | 795 | static int |
fceaf24a | 796 | NetVscOnDeviceAdd( |
3d3b5518 | 797 | struct hv_device *Device, |
fceaf24a HJ |
798 | void *AdditionalInfo |
799 | ) | |
800 | { | |
801 | int ret=0; | |
802 | int i; | |
803 | ||
d1af1db7 | 804 | struct NETVSC_DEVICE *netDevice; |
4193d4f4 | 805 | struct hv_netvsc_packet *packet; |
fceaf24a HJ |
806 | LIST_ENTRY *entry; |
807 | ||
808 | NETVSC_DRIVER_OBJECT *netDriver = (NETVSC_DRIVER_OBJECT*) Device->Driver;; | |
809 | ||
810 | DPRINT_ENTER(NETVSC); | |
811 | ||
812 | netDevice = AllocNetDevice(Device); | |
813 | if (!netDevice) | |
814 | { | |
815 | ret = -1; | |
816 | goto Cleanup; | |
817 | } | |
818 | ||
819 | DPRINT_DBG(NETVSC, "netvsc channel object allocated - %p", netDevice); | |
820 | ||
454f18a9 | 821 | /* Initialize the NetVSC channel extension */ |
fceaf24a | 822 | netDevice->ReceiveBufferSize = NETVSC_RECEIVE_BUFFER_SIZE; |
6436873a | 823 | spin_lock_init(&netDevice->receive_packet_list_lock); |
fceaf24a HJ |
824 | |
825 | netDevice->SendBufferSize = NETVSC_SEND_BUFFER_SIZE; | |
826 | ||
827 | INITIALIZE_LIST_HEAD(&netDevice->ReceivePacketList); | |
828 | ||
829 | for (i=0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++) | |
830 | { | |
4193d4f4 | 831 | packet = kzalloc(sizeof(struct hv_netvsc_packet) + (NETVSC_RECEIVE_SG_COUNT* sizeof(PAGE_BUFFER)), GFP_KERNEL); |
fceaf24a HJ |
832 | if (!packet) |
833 | { | |
834 | DPRINT_DBG(NETVSC, "unable to allocate netvsc pkts for receive pool (wanted %d got %d)", NETVSC_RECEIVE_PACKETLIST_COUNT, i); | |
835 | break; | |
836 | } | |
837 | ||
838 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->ListEntry); | |
839 | } | |
840 | netDevice->ChannelInitEvent = WaitEventCreate(); | |
841 | ||
454f18a9 | 842 | /* Open the channel */ |
fceaf24a | 843 | ret = Device->Driver->VmbusChannelInterface.Open(Device, |
454f18a9 BP |
844 | netDriver->RingBufferSize, |
845 | netDriver->RingBufferSize, | |
846 | NULL, 0, | |
847 | NetVscOnChannelCallback, | |
848 | Device | |
849 | ); | |
fceaf24a HJ |
850 | |
851 | if (ret != 0) | |
852 | { | |
853 | DPRINT_ERR(NETVSC, "unable to open channel: %d", ret); | |
854 | ret = -1; | |
855 | goto Cleanup; | |
856 | } | |
857 | ||
454f18a9 | 858 | /* Channel is opened */ |
fceaf24a HJ |
859 | DPRINT_INFO(NETVSC, "*** NetVSC channel opened successfully! ***"); |
860 | ||
454f18a9 | 861 | /* Connect with the NetVsp */ |
fceaf24a HJ |
862 | ret = NetVscConnectToVsp(Device); |
863 | if (ret != 0) | |
864 | { | |
865 | DPRINT_ERR(NETVSC, "unable to connect to NetVSP - %d", ret); | |
866 | ret = -1; | |
867 | goto Close; | |
868 | } | |
869 | ||
870 | DPRINT_INFO(NETVSC, "*** NetVSC channel handshake result - %d ***", ret); | |
871 | ||
872 | DPRINT_EXIT(NETVSC); | |
873 | return ret; | |
874 | ||
875 | Close: | |
454f18a9 | 876 | /* Now, we can close the channel safely */ |
fceaf24a HJ |
877 | Device->Driver->VmbusChannelInterface.Close(Device); |
878 | ||
879 | Cleanup: | |
880 | ||
881 | if (netDevice) | |
882 | { | |
883 | WaitEventClose(netDevice->ChannelInitEvent); | |
884 | ||
885 | while (!IsListEmpty(&netDevice->ReceivePacketList)) | |
886 | { | |
887 | entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList); | |
4193d4f4 | 888 | packet = CONTAINING_RECORD(entry, struct hv_netvsc_packet, ListEntry); |
8c69f52a | 889 | kfree(packet); |
fceaf24a HJ |
890 | } |
891 | ||
fceaf24a HJ |
892 | ReleaseOutboundNetDevice(Device); |
893 | ReleaseInboundNetDevice(Device); | |
894 | ||
895 | FreeNetDevice(netDevice); | |
896 | } | |
897 | ||
898 | DPRINT_EXIT(NETVSC); | |
899 | return ret; | |
900 | } | |
901 | ||
902 | ||
903 | /*++ | |
904 | ||
905 | Name: | |
906 | NetVscOnDeviceRemove() | |
907 | ||
908 | Description: | |
909 | Callback when the root bus device is removed | |
910 | ||
911 | --*/ | |
bd1de709 | 912 | static int |
fceaf24a | 913 | NetVscOnDeviceRemove( |
3d3b5518 | 914 | struct hv_device *Device |
fceaf24a HJ |
915 | ) |
916 | { | |
d1af1db7 | 917 | struct NETVSC_DEVICE *netDevice; |
4193d4f4 | 918 | struct hv_netvsc_packet *netvscPacket; |
fceaf24a HJ |
919 | int ret=0; |
920 | LIST_ENTRY *entry; | |
921 | ||
922 | DPRINT_ENTER(NETVSC); | |
923 | ||
924 | DPRINT_INFO(NETVSC, "Disabling outbound traffic on net device (%p)...", Device->Extension); | |
925 | ||
454f18a9 | 926 | /* Stop outbound traffic ie sends and receives completions */ |
fceaf24a HJ |
927 | netDevice = ReleaseOutboundNetDevice(Device); |
928 | if (!netDevice) | |
929 | { | |
930 | DPRINT_ERR(NETVSC, "No net device present!!"); | |
931 | return -1; | |
932 | } | |
933 | ||
454f18a9 | 934 | /* Wait for all send completions */ |
fceaf24a HJ |
935 | while (netDevice->NumOutstandingSends) |
936 | { | |
937 | DPRINT_INFO(NETVSC, "waiting for %d requests to complete...", netDevice->NumOutstandingSends); | |
938 | ||
b4362c9c | 939 | udelay(100); |
fceaf24a HJ |
940 | } |
941 | ||
942 | DPRINT_INFO(NETVSC, "Disconnecting from netvsp..."); | |
943 | ||
944 | NetVscDisconnectFromVsp(netDevice); | |
945 | ||
946 | DPRINT_INFO(NETVSC, "Disabling inbound traffic on net device (%p)...", Device->Extension); | |
947 | ||
454f18a9 | 948 | /* Stop inbound traffic ie receives and sends completions */ |
fceaf24a HJ |
949 | netDevice = ReleaseInboundNetDevice(Device); |
950 | ||
454f18a9 | 951 | /* At this point, no one should be accessing netDevice except in here */ |
fceaf24a HJ |
952 | DPRINT_INFO(NETVSC, "net device (%p) safe to remove", netDevice); |
953 | ||
454f18a9 | 954 | /* Now, we can close the channel safely */ |
fceaf24a HJ |
955 | Device->Driver->VmbusChannelInterface.Close(Device); |
956 | ||
454f18a9 | 957 | /* Release all resources */ |
fceaf24a HJ |
958 | while (!IsListEmpty(&netDevice->ReceivePacketList)) |
959 | { | |
960 | entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList); | |
4193d4f4 | 961 | netvscPacket = CONTAINING_RECORD(entry, struct hv_netvsc_packet, ListEntry); |
fceaf24a | 962 | |
8c69f52a | 963 | kfree(netvscPacket); |
fceaf24a HJ |
964 | } |
965 | ||
fceaf24a HJ |
966 | WaitEventClose(netDevice->ChannelInitEvent); |
967 | FreeNetDevice(netDevice); | |
968 | ||
969 | DPRINT_EXIT(NETVSC); | |
970 | return ret; | |
971 | } | |
972 | ||
973 | ||
974 | ||
975 | /*++ | |
976 | ||
977 | Name: | |
978 | NetVscOnCleanup() | |
979 | ||
980 | Description: | |
981 | Perform any cleanup when the driver is removed | |
982 | ||
983 | --*/ | |
bd1de709 | 984 | static void |
fceaf24a | 985 | NetVscOnCleanup( |
775ef25e | 986 | struct hv_driver *drv |
fceaf24a HJ |
987 | ) |
988 | { | |
989 | DPRINT_ENTER(NETVSC); | |
990 | ||
991 | DPRINT_EXIT(NETVSC); | |
992 | } | |
993 | ||
994 | static void | |
995 | NetVscOnSendCompletion( | |
3d3b5518 | 996 | struct hv_device *Device, |
fceaf24a HJ |
997 | VMPACKET_DESCRIPTOR *Packet |
998 | ) | |
999 | { | |
d1af1db7 | 1000 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 1001 | NVSP_MESSAGE *nvspPacket; |
4193d4f4 | 1002 | struct hv_netvsc_packet *nvscPacket; |
fceaf24a HJ |
1003 | |
1004 | DPRINT_ENTER(NETVSC); | |
1005 | ||
1006 | netDevice = GetInboundNetDevice(Device); | |
1007 | if (!netDevice) | |
1008 | { | |
1009 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
1010 | DPRINT_EXIT(NETVSC); | |
1011 | return; | |
1012 | } | |
1013 | ||
c4b0bc94 | 1014 | nvspPacket = (NVSP_MESSAGE*)((unsigned long)Packet + (Packet->DataOffset8 << 3)); |
fceaf24a HJ |
1015 | |
1016 | DPRINT_DBG(NETVSC, "send completion packet - type %d", nvspPacket->Header.MessageType); | |
1017 | ||
1018 | if (nvspPacket->Header.MessageType == NvspMessageTypeInitComplete || | |
1019 | nvspPacket->Header.MessageType == NvspMessage1TypeSendReceiveBufferComplete || | |
1020 | nvspPacket->Header.MessageType == NvspMessage1TypeSendSendBufferComplete) | |
1021 | { | |
454f18a9 | 1022 | /* Copy the response back */ |
fceaf24a HJ |
1023 | memcpy(&netDevice->ChannelInitPacket, nvspPacket, sizeof(NVSP_MESSAGE)); |
1024 | WaitEventSet(netDevice->ChannelInitEvent); | |
1025 | } | |
1026 | else if (nvspPacket->Header.MessageType == NvspMessage1TypeSendRNDISPacketComplete) | |
1027 | { | |
454f18a9 | 1028 | /* Get the send context */ |
4193d4f4 | 1029 | nvscPacket = (struct hv_netvsc_packet *)(unsigned long)Packet->TransactionId; |
fceaf24a HJ |
1030 | ASSERT(nvscPacket); |
1031 | ||
454f18a9 | 1032 | /* Notify the layer above us */ |
fceaf24a HJ |
1033 | nvscPacket->Completion.Send.OnSendCompletion(nvscPacket->Completion.Send.SendCompletionContext); |
1034 | ||
1035 | InterlockedDecrement(&netDevice->NumOutstandingSends); | |
1036 | } | |
1037 | else | |
1038 | { | |
1039 | DPRINT_ERR(NETVSC, "Unknown send completion packet type - %d received!!", nvspPacket->Header.MessageType); | |
1040 | } | |
1041 | ||
1042 | PutNetDevice(Device); | |
1043 | DPRINT_EXIT(NETVSC); | |
1044 | } | |
1045 | ||
1046 | ||
1047 | ||
1048 | static int | |
1049 | NetVscOnSend( | |
3d3b5518 | 1050 | struct hv_device *Device, |
4193d4f4 | 1051 | struct hv_netvsc_packet *Packet |
fceaf24a HJ |
1052 | ) |
1053 | { | |
d1af1db7 | 1054 | struct NETVSC_DEVICE *netDevice; |
fceaf24a HJ |
1055 | int ret=0; |
1056 | ||
1057 | NVSP_MESSAGE sendMessage; | |
1058 | ||
1059 | DPRINT_ENTER(NETVSC); | |
1060 | ||
1061 | netDevice = GetOutboundNetDevice(Device); | |
1062 | if (!netDevice) | |
1063 | { | |
1064 | DPRINT_ERR(NETVSC, "net device (%p) shutting down...ignoring outbound packets", netDevice); | |
1065 | DPRINT_EXIT(NETVSC); | |
1066 | return -2; | |
1067 | } | |
1068 | ||
1069 | sendMessage.Header.MessageType = NvspMessage1TypeSendRNDISPacket; | |
1070 | if (Packet->IsDataPacket) | |
454f18a9 | 1071 | sendMessage.Messages.Version1Messages.SendRNDISPacket.ChannelType = 0;/* 0 is RMC_DATA; */ |
fceaf24a | 1072 | else |
454f18a9 | 1073 | sendMessage.Messages.Version1Messages.SendRNDISPacket.ChannelType = 1;/* 1 is RMC_CONTROL; */ |
fceaf24a | 1074 | |
454f18a9 | 1075 | /* Not using send buffer section */ |
fceaf24a HJ |
1076 | sendMessage.Messages.Version1Messages.SendRNDISPacket.SendBufferSectionIndex = 0xFFFFFFFF; |
1077 | sendMessage.Messages.Version1Messages.SendRNDISPacket.SendBufferSectionSize = 0; | |
1078 | ||
1079 | if (Packet->PageBufferCount) | |
1080 | { | |
1081 | ret = Device->Driver->VmbusChannelInterface.SendPacketPageBuffer(Device, | |
1082 | Packet->PageBuffers, | |
1083 | Packet->PageBufferCount, | |
1084 | &sendMessage, | |
1085 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 1086 | (unsigned long)Packet); |
fceaf24a HJ |
1087 | } |
1088 | else | |
1089 | { | |
1090 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
1091 | &sendMessage, | |
1092 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 1093 | (unsigned long)Packet, |
fceaf24a HJ |
1094 | VmbusPacketTypeDataInBand, |
1095 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
1096 | ||
1097 | } | |
1098 | ||
1099 | if (ret != 0) | |
1100 | { | |
1101 | DPRINT_ERR(NETVSC, "Unable to send packet %p ret %d", Packet, ret); | |
1102 | } | |
1103 | ||
1104 | InterlockedIncrement(&netDevice->NumOutstandingSends); | |
1105 | PutNetDevice(Device); | |
1106 | ||
1107 | DPRINT_EXIT(NETVSC); | |
1108 | return ret; | |
1109 | } | |
1110 | ||
1111 | ||
1112 | static void | |
1113 | NetVscOnReceive( | |
3d3b5518 | 1114 | struct hv_device *Device, |
fceaf24a HJ |
1115 | VMPACKET_DESCRIPTOR *Packet |
1116 | ) | |
1117 | { | |
d1af1db7 | 1118 | struct NETVSC_DEVICE *netDevice; |
fceaf24a HJ |
1119 | VMTRANSFER_PAGE_PACKET_HEADER *vmxferpagePacket; |
1120 | NVSP_MESSAGE *nvspPacket; | |
4193d4f4 | 1121 | struct hv_netvsc_packet *netvscPacket=NULL; |
fceaf24a | 1122 | LIST_ENTRY* entry; |
c4b0bc94 GKH |
1123 | unsigned long start; |
1124 | unsigned long end, endVirtual; | |
454f18a9 | 1125 | /* NETVSC_DRIVER_OBJECT *netvscDriver; */ |
fceaf24a HJ |
1126 | XFERPAGE_PACKET *xferpagePacket=NULL; |
1127 | LIST_ENTRY listHead; | |
1128 | ||
1129 | int i=0, j=0; | |
1130 | int count=0, bytesRemain=0; | |
6436873a | 1131 | unsigned long flags; |
fceaf24a HJ |
1132 | |
1133 | DPRINT_ENTER(NETVSC); | |
1134 | ||
1135 | netDevice = GetInboundNetDevice(Device); | |
1136 | if (!netDevice) | |
1137 | { | |
1138 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
1139 | DPRINT_EXIT(NETVSC); | |
1140 | return; | |
1141 | } | |
1142 | ||
454f18a9 | 1143 | /* All inbound packets other than send completion should be xfer page packet */ |
fceaf24a HJ |
1144 | if (Packet->Type != VmbusPacketTypeDataUsingTransferPages) |
1145 | { | |
1146 | DPRINT_ERR(NETVSC, "Unknown packet type received - %d", Packet->Type); | |
1147 | PutNetDevice(Device); | |
1148 | return; | |
1149 | } | |
1150 | ||
c4b0bc94 | 1151 | nvspPacket = (NVSP_MESSAGE*)((unsigned long)Packet + (Packet->DataOffset8 << 3)); |
fceaf24a | 1152 | |
454f18a9 | 1153 | /* Make sure this is a valid nvsp packet */ |
fceaf24a HJ |
1154 | if (nvspPacket->Header.MessageType != NvspMessage1TypeSendRNDISPacket ) |
1155 | { | |
1156 | DPRINT_ERR(NETVSC, "Unknown nvsp packet type received - %d", nvspPacket->Header.MessageType); | |
1157 | PutNetDevice(Device); | |
1158 | return; | |
1159 | } | |
1160 | ||
1161 | DPRINT_DBG(NETVSC, "NVSP packet received - type %d", nvspPacket->Header.MessageType); | |
1162 | ||
1163 | vmxferpagePacket = (VMTRANSFER_PAGE_PACKET_HEADER*)Packet; | |
1164 | ||
1165 | if (vmxferpagePacket->TransferPageSetId != NETVSC_RECEIVE_BUFFER_ID) | |
1166 | { | |
1167 | DPRINT_ERR(NETVSC, "Invalid xfer page set id - expecting %x got %x", NETVSC_RECEIVE_BUFFER_ID, vmxferpagePacket->TransferPageSetId); | |
1168 | PutNetDevice(Device); | |
1169 | return; | |
1170 | } | |
1171 | ||
1172 | DPRINT_DBG(NETVSC, "xfer page - range count %d", vmxferpagePacket->RangeCount); | |
1173 | ||
1174 | INITIALIZE_LIST_HEAD(&listHead); | |
1175 | ||
454f18a9 BP |
1176 | /* |
1177 | * Grab free packets (range count + 1) to represent this xfer | |
1178 | * page packet. +1 to represent the xfer page packet itself. | |
1179 | * We grab it here so that we know exactly how many we can | |
1180 | * fulfil | |
1181 | */ | |
6436873a | 1182 | spin_lock_irqsave(&netDevice->receive_packet_list_lock, flags); |
fceaf24a HJ |
1183 | while (!IsListEmpty(&netDevice->ReceivePacketList)) |
1184 | { | |
1185 | entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList); | |
4193d4f4 | 1186 | netvscPacket = CONTAINING_RECORD(entry, struct hv_netvsc_packet, ListEntry); |
fceaf24a HJ |
1187 | |
1188 | INSERT_TAIL_LIST(&listHead, &netvscPacket->ListEntry); | |
1189 | ||
1190 | if (++count == vmxferpagePacket->RangeCount + 1) | |
1191 | break; | |
1192 | } | |
6436873a | 1193 | spin_unlock_irqrestore(&netDevice->receive_packet_list_lock, flags); |
fceaf24a | 1194 | |
454f18a9 BP |
1195 | /* |
1196 | * We need at least 2 netvsc pkts (1 to represent the xfer | |
1197 | * page and at least 1 for the range) i.e. we can handled | |
1198 | * some of the xfer page packet ranges... | |
1199 | */ | |
fceaf24a HJ |
1200 | if (count < 2) |
1201 | { | |
1202 | DPRINT_ERR(NETVSC, "Got only %d netvsc pkt...needed %d pkts. Dropping this xfer page packet completely!", count, vmxferpagePacket->RangeCount+1); | |
1203 | ||
454f18a9 | 1204 | /* Return it to the freelist */ |
6436873a | 1205 | spin_lock_irqsave(&netDevice->receive_packet_list_lock, flags); |
fceaf24a HJ |
1206 | for (i=count; i != 0; i--) |
1207 | { | |
1208 | entry = REMOVE_HEAD_LIST(&listHead); | |
4193d4f4 | 1209 | netvscPacket = CONTAINING_RECORD(entry, struct hv_netvsc_packet, ListEntry); |
fceaf24a HJ |
1210 | |
1211 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &netvscPacket->ListEntry); | |
1212 | } | |
6436873a | 1213 | spin_unlock_irqrestore(&netDevice->receive_packet_list_lock, flags); |
fceaf24a HJ |
1214 | |
1215 | NetVscSendReceiveCompletion(Device, vmxferpagePacket->d.TransactionId); | |
1216 | ||
1217 | PutNetDevice(Device); | |
1218 | return; | |
1219 | } | |
1220 | ||
454f18a9 | 1221 | /* Remove the 1st packet to represent the xfer page packet itself */ |
fceaf24a HJ |
1222 | entry = REMOVE_HEAD_LIST(&listHead); |
1223 | xferpagePacket = CONTAINING_RECORD(entry, XFERPAGE_PACKET, ListEntry); | |
454f18a9 | 1224 | xferpagePacket->Count = count - 1; /* This is how much we can satisfy */ |
fceaf24a HJ |
1225 | ASSERT(xferpagePacket->Count > 0 && xferpagePacket->Count <= vmxferpagePacket->RangeCount); |
1226 | ||
1227 | if (xferpagePacket->Count != vmxferpagePacket->RangeCount) | |
1228 | { | |
1229 | DPRINT_INFO(NETVSC, "Needed %d netvsc pkts to satisy this xfer page...got %d", vmxferpagePacket->RangeCount, xferpagePacket->Count); | |
1230 | } | |
1231 | ||
454f18a9 | 1232 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
fceaf24a HJ |
1233 | for (i=0; i < (count - 1); i++) |
1234 | { | |
1235 | entry = REMOVE_HEAD_LIST(&listHead); | |
4193d4f4 | 1236 | netvscPacket = CONTAINING_RECORD(entry, struct hv_netvsc_packet, ListEntry); |
fceaf24a | 1237 | |
454f18a9 | 1238 | /* Initialize the netvsc packet */ |
fceaf24a HJ |
1239 | netvscPacket->XferPagePacket = xferpagePacket; |
1240 | netvscPacket->Completion.Recv.OnReceiveCompletion = NetVscOnReceiveCompletion; | |
1241 | netvscPacket->Completion.Recv.ReceiveCompletionContext = netvscPacket; | |
1242 | netvscPacket->Device = Device; | |
454f18a9 | 1243 | netvscPacket->Completion.Recv.ReceiveCompletionTid = vmxferpagePacket->d.TransactionId; /* Save this so that we can send it back */ |
fceaf24a HJ |
1244 | |
1245 | netvscPacket->TotalDataBufferLength = vmxferpagePacket->Ranges[i].ByteCount; | |
1246 | netvscPacket->PageBufferCount = 1; | |
1247 | ||
1248 | ASSERT(vmxferpagePacket->Ranges[i].ByteOffset + vmxferpagePacket->Ranges[i].ByteCount < netDevice->ReceiveBufferSize); | |
1249 | ||
1250 | netvscPacket->PageBuffers[0].Length = vmxferpagePacket->Ranges[i].ByteCount; | |
1251 | ||
c4b0bc94 | 1252 | start = GetPhysicalAddress((void*)((unsigned long)netDevice->ReceiveBuffer + vmxferpagePacket->Ranges[i].ByteOffset)); |
fceaf24a HJ |
1253 | |
1254 | netvscPacket->PageBuffers[0].Pfn = start >> PAGE_SHIFT; | |
c4b0bc94 | 1255 | endVirtual = (unsigned long)netDevice->ReceiveBuffer |
fceaf24a HJ |
1256 | + vmxferpagePacket->Ranges[i].ByteOffset |
1257 | + vmxferpagePacket->Ranges[i].ByteCount -1; | |
1258 | end = GetPhysicalAddress((void*)endVirtual); | |
1259 | ||
454f18a9 | 1260 | /* Calculate the page relative offset */ |
fceaf24a HJ |
1261 | netvscPacket->PageBuffers[0].Offset = vmxferpagePacket->Ranges[i].ByteOffset & (PAGE_SIZE -1); |
1262 | if ((end >> PAGE_SHIFT) != (start>>PAGE_SHIFT)) { | |
454f18a9 | 1263 | /* Handle frame across multiple pages: */ |
fceaf24a HJ |
1264 | netvscPacket->PageBuffers[0].Length = |
1265 | (netvscPacket->PageBuffers[0].Pfn <<PAGE_SHIFT) + PAGE_SIZE - start; | |
1266 | bytesRemain = netvscPacket->TotalDataBufferLength - netvscPacket->PageBuffers[0].Length; | |
1267 | for (j=1; j<NETVSC_PACKET_MAXPAGE; j++) { | |
1268 | netvscPacket->PageBuffers[j].Offset = 0; | |
1269 | if (bytesRemain <= PAGE_SIZE) { | |
1270 | netvscPacket->PageBuffers[j].Length = bytesRemain; | |
1271 | bytesRemain = 0; | |
1272 | } else { | |
1273 | netvscPacket->PageBuffers[j].Length = PAGE_SIZE; | |
1274 | bytesRemain -= PAGE_SIZE; | |
1275 | } | |
1276 | netvscPacket->PageBuffers[j].Pfn = | |
1277 | GetPhysicalAddress((void*)(endVirtual - bytesRemain)) >> PAGE_SHIFT; | |
1278 | netvscPacket->PageBufferCount++; | |
1279 | if (bytesRemain == 0) | |
1280 | break; | |
1281 | } | |
1282 | ASSERT(bytesRemain == 0); | |
1283 | } | |
1284 | DPRINT_DBG(NETVSC, "[%d] - (abs offset %u len %u) => (pfn %llx, offset %u, len %u)", | |
1285 | i, | |
1286 | vmxferpagePacket->Ranges[i].ByteOffset, | |
1287 | vmxferpagePacket->Ranges[i].ByteCount, | |
1288 | netvscPacket->PageBuffers[0].Pfn, | |
1289 | netvscPacket->PageBuffers[0].Offset, | |
1290 | netvscPacket->PageBuffers[0].Length); | |
1291 | ||
454f18a9 | 1292 | /* Pass it to the upper layer */ |
fceaf24a HJ |
1293 | ((NETVSC_DRIVER_OBJECT*)Device->Driver)->OnReceiveCallback(Device, netvscPacket); |
1294 | ||
1295 | NetVscOnReceiveCompletion(netvscPacket->Completion.Recv.ReceiveCompletionContext); | |
1296 | } | |
1297 | ||
1298 | ASSERT(IsListEmpty(&listHead)); | |
1299 | ||
1300 | PutNetDevice(Device); | |
1301 | DPRINT_EXIT(NETVSC); | |
1302 | } | |
1303 | ||
1304 | ||
1305 | static void | |
1306 | NetVscSendReceiveCompletion( | |
3d3b5518 | 1307 | struct hv_device *Device, |
59471438 | 1308 | u64 TransactionId |
fceaf24a HJ |
1309 | ) |
1310 | { | |
1311 | NVSP_MESSAGE recvcompMessage; | |
1312 | int retries=0; | |
1313 | int ret=0; | |
1314 | ||
1315 | DPRINT_DBG(NETVSC, "Sending receive completion pkt - %llx", TransactionId); | |
1316 | ||
1317 | recvcompMessage.Header.MessageType = NvspMessage1TypeSendRNDISPacketComplete; | |
1318 | ||
454f18a9 | 1319 | /* FIXME: Pass in the status */ |
fceaf24a HJ |
1320 | recvcompMessage.Messages.Version1Messages.SendRNDISPacketComplete.Status = NvspStatusSuccess; |
1321 | ||
1322 | retry_send_cmplt: | |
454f18a9 | 1323 | /* Send the completion */ |
fceaf24a HJ |
1324 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
1325 | &recvcompMessage, | |
1326 | sizeof(NVSP_MESSAGE), | |
1327 | TransactionId, | |
1328 | VmbusPacketTypeCompletion, | |
1329 | 0); | |
454f18a9 | 1330 | if (ret == 0) /* success */ |
fceaf24a | 1331 | { |
454f18a9 | 1332 | /* no-op */ |
fceaf24a | 1333 | } |
454f18a9 | 1334 | else if (ret == -1) /* no more room...wait a bit and attempt to retry 3 times */ |
fceaf24a HJ |
1335 | { |
1336 | retries++; | |
1337 | DPRINT_ERR(NETVSC, "unable to send receive completion pkt (tid %llx)...retrying %d", TransactionId, retries); | |
1338 | ||
1339 | if (retries < 4) | |
1340 | { | |
b4362c9c | 1341 | udelay(100); |
fceaf24a HJ |
1342 | goto retry_send_cmplt; |
1343 | } | |
1344 | else | |
1345 | { | |
1346 | DPRINT_ERR(NETVSC, "unable to send receive completion pkt (tid %llx)...give up retrying", TransactionId); | |
1347 | } | |
1348 | } | |
1349 | else | |
1350 | { | |
1351 | DPRINT_ERR(NETVSC, "unable to send receive completion pkt - %llx", TransactionId); | |
1352 | } | |
1353 | } | |
1354 | ||
454f18a9 | 1355 | /* Send a receive completion packet to RNDIS device (ie NetVsp) */ |
fceaf24a HJ |
1356 | static void |
1357 | NetVscOnReceiveCompletion( | |
8282c400 | 1358 | void * Context) |
fceaf24a | 1359 | { |
4193d4f4 | 1360 | struct hv_netvsc_packet *packet = (struct hv_netvsc_packet*)Context; |
3d3b5518 | 1361 | struct hv_device *device = (struct hv_device*)packet->Device; |
d1af1db7 | 1362 | struct NETVSC_DEVICE *netDevice; |
59471438 | 1363 | u64 transactionId=0; |
0e727613 | 1364 | bool fSendReceiveComp = false; |
6436873a | 1365 | unsigned long flags; |
fceaf24a HJ |
1366 | |
1367 | DPRINT_ENTER(NETVSC); | |
1368 | ||
1369 | ASSERT(packet->XferPagePacket); | |
1370 | ||
454f18a9 BP |
1371 | /* Even though it seems logical to do a GetOutboundNetDevice() here to send out receive completion, */ |
1372 | /* we are using GetInboundNetDevice() since we may have disable outbound traffic already. */ | |
fceaf24a HJ |
1373 | netDevice = GetInboundNetDevice(device); |
1374 | if (!netDevice) | |
1375 | { | |
1376 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
1377 | DPRINT_EXIT(NETVSC); | |
1378 | return; | |
1379 | } | |
1380 | ||
454f18a9 | 1381 | /* Overloading use of the lock. */ |
6436873a | 1382 | spin_lock_irqsave(&netDevice->receive_packet_list_lock, flags); |
fceaf24a HJ |
1383 | |
1384 | ASSERT(packet->XferPagePacket->Count > 0); | |
1385 | packet->XferPagePacket->Count--; | |
1386 | ||
454f18a9 BP |
1387 | /* Last one in the line that represent 1 xfer page packet. */ |
1388 | /* Return the xfer page packet itself to the freelist */ | |
fceaf24a HJ |
1389 | if (packet->XferPagePacket->Count == 0) |
1390 | { | |
0e727613 | 1391 | fSendReceiveComp = true; |
fceaf24a HJ |
1392 | transactionId = packet->Completion.Recv.ReceiveCompletionTid; |
1393 | ||
1394 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->XferPagePacket->ListEntry); | |
1395 | } | |
1396 | ||
454f18a9 | 1397 | /* Put the packet back */ |
fceaf24a | 1398 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->ListEntry); |
6436873a | 1399 | spin_unlock_irqrestore(&netDevice->receive_packet_list_lock, flags); |
fceaf24a | 1400 | |
454f18a9 | 1401 | /* Send a receive completion for the xfer page packet */ |
fceaf24a HJ |
1402 | if (fSendReceiveComp) |
1403 | { | |
1404 | NetVscSendReceiveCompletion(device, transactionId); | |
1405 | } | |
1406 | ||
1407 | PutNetDevice(device); | |
1408 | DPRINT_EXIT(NETVSC); | |
1409 | } | |
1410 | ||
1411 | ||
1412 | ||
1413 | void | |
1414 | NetVscOnChannelCallback( | |
8282c400 | 1415 | void * Context |
fceaf24a HJ |
1416 | ) |
1417 | { | |
1418 | const int netPacketSize=2048; | |
1419 | int ret=0; | |
3d3b5518 | 1420 | struct hv_device *device=(struct hv_device*)Context; |
d1af1db7 | 1421 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 1422 | |
4d643114 | 1423 | u32 bytesRecvd; |
59471438 GKH |
1424 | u64 requestId; |
1425 | unsigned char packet[netPacketSize]; | |
fceaf24a | 1426 | VMPACKET_DESCRIPTOR *desc; |
59471438 | 1427 | unsigned char *buffer=packet; |
fceaf24a HJ |
1428 | int bufferlen=netPacketSize; |
1429 | ||
1430 | ||
1431 | DPRINT_ENTER(NETVSC); | |
1432 | ||
1433 | ASSERT(device); | |
1434 | ||
1435 | netDevice = GetInboundNetDevice(device); | |
1436 | if (!netDevice) | |
1437 | { | |
1438 | DPRINT_ERR(NETVSC, "net device (%p) shutting down...ignoring inbound packets", netDevice); | |
1439 | DPRINT_EXIT(NETVSC); | |
1440 | return; | |
1441 | } | |
1442 | ||
1443 | do | |
1444 | { | |
1445 | ret = device->Driver->VmbusChannelInterface.RecvPacketRaw(device, | |
1446 | buffer, | |
1447 | bufferlen, | |
1448 | &bytesRecvd, | |
1449 | &requestId); | |
1450 | ||
1451 | if (ret == 0) | |
1452 | { | |
1453 | if (bytesRecvd > 0) | |
1454 | { | |
1455 | DPRINT_DBG(NETVSC, "receive %d bytes, tid %llx", bytesRecvd, requestId); | |
1456 | ||
1457 | desc = (VMPACKET_DESCRIPTOR*)buffer; | |
1458 | switch (desc->Type) | |
1459 | { | |
1460 | case VmbusPacketTypeCompletion: | |
1461 | NetVscOnSendCompletion(device, desc); | |
1462 | break; | |
1463 | ||
1464 | case VmbusPacketTypeDataUsingTransferPages: | |
1465 | NetVscOnReceive(device, desc); | |
1466 | break; | |
1467 | ||
1468 | default: | |
1469 | DPRINT_ERR(NETVSC, "unhandled packet type %d, tid %llx len %d\n", desc->Type, requestId, bytesRecvd); | |
1470 | break; | |
1471 | } | |
1472 | ||
454f18a9 | 1473 | /* reset */ |
fceaf24a HJ |
1474 | if (bufferlen > netPacketSize) |
1475 | { | |
8c69f52a | 1476 | kfree(buffer); |
fceaf24a HJ |
1477 | |
1478 | buffer = packet; | |
1479 | bufferlen = netPacketSize; | |
1480 | } | |
1481 | } | |
1482 | else | |
1483 | { | |
454f18a9 | 1484 | /* DPRINT_DBG(NETVSC, "nothing else to read..."); */ |
fceaf24a | 1485 | |
454f18a9 | 1486 | /* reset */ |
fceaf24a HJ |
1487 | if (bufferlen > netPacketSize) |
1488 | { | |
8c69f52a | 1489 | kfree(buffer); |
fceaf24a HJ |
1490 | |
1491 | buffer = packet; | |
1492 | bufferlen = netPacketSize; | |
1493 | } | |
1494 | ||
1495 | break; | |
1496 | } | |
1497 | } | |
454f18a9 | 1498 | else if (ret == -2) /* Handle large packet */ |
fceaf24a | 1499 | { |
0a72f3cf | 1500 | buffer = kmalloc(bytesRecvd, GFP_ATOMIC); |
fceaf24a HJ |
1501 | if (buffer == NULL) |
1502 | { | |
454f18a9 | 1503 | /* Try again next time around */ |
fceaf24a HJ |
1504 | DPRINT_ERR(NETVSC, "unable to allocate buffer of size (%d)!!", bytesRecvd); |
1505 | break; | |
1506 | } | |
1507 | ||
1508 | bufferlen = bytesRecvd; | |
1509 | } | |
1510 | else | |
1511 | { | |
1512 | ASSERT(0); | |
1513 | } | |
1514 | } while (1); | |
1515 | ||
1516 | PutNetDevice(device); | |
1517 | DPRINT_EXIT(NETVSC); | |
1518 | return; | |
1519 | } |