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> |
fa56d361 | 26 | #include <asm/io.h> |
c86f3e2a | 27 | #include "include/logging.h" |
fceaf24a HJ |
28 | #include "NetVsc.h" |
29 | #include "RndisFilter.h" | |
30 | ||
31 | ||
454f18a9 | 32 | /* Globals */ |
fceaf24a HJ |
33 | static const char* gDriverName="netvsc"; |
34 | ||
454f18a9 | 35 | /* {F8615163-DF3E-46c5-913F-F2D2F965ED0E} */ |
fceaf24a HJ |
36 | static const GUID gNetVscDeviceType={ |
37 | .Data = {0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E} | |
38 | }; | |
39 | ||
40 | ||
454f18a9 | 41 | /* Internal routines */ |
fceaf24a HJ |
42 | static int |
43 | NetVscOnDeviceAdd( | |
3d3b5518 | 44 | struct hv_device *Device, |
fceaf24a HJ |
45 | void *AdditionalInfo |
46 | ); | |
47 | ||
48 | static int | |
49 | NetVscOnDeviceRemove( | |
3d3b5518 | 50 | struct hv_device *Device |
fceaf24a HJ |
51 | ); |
52 | ||
53 | static void | |
54 | NetVscOnCleanup( | |
775ef25e | 55 | struct hv_driver *Driver |
fceaf24a HJ |
56 | ); |
57 | ||
58 | static void | |
59 | NetVscOnChannelCallback( | |
8282c400 | 60 | void * context |
fceaf24a HJ |
61 | ); |
62 | ||
63 | static int | |
64 | NetVscInitializeSendBufferWithNetVsp( | |
3d3b5518 | 65 | struct hv_device *Device |
fceaf24a HJ |
66 | ); |
67 | ||
68 | static int | |
69 | NetVscInitializeReceiveBufferWithNetVsp( | |
3d3b5518 | 70 | struct hv_device *Device |
fceaf24a HJ |
71 | ); |
72 | ||
73 | static int | |
74 | NetVscDestroySendBuffer( | |
d1af1db7 | 75 | struct NETVSC_DEVICE *NetDevice |
fceaf24a HJ |
76 | ); |
77 | ||
78 | static int | |
79 | NetVscDestroyReceiveBuffer( | |
d1af1db7 | 80 | struct NETVSC_DEVICE *NetDevice |
fceaf24a HJ |
81 | ); |
82 | ||
83 | static int | |
84 | NetVscConnectToVsp( | |
3d3b5518 | 85 | struct hv_device *Device |
fceaf24a HJ |
86 | ); |
87 | ||
88 | static void | |
89 | NetVscOnSendCompletion( | |
3d3b5518 | 90 | struct hv_device *Device, |
fceaf24a HJ |
91 | VMPACKET_DESCRIPTOR *Packet |
92 | ); | |
93 | ||
94 | static int | |
95 | NetVscOnSend( | |
3d3b5518 | 96 | struct hv_device *Device, |
4193d4f4 | 97 | struct hv_netvsc_packet *Packet |
fceaf24a HJ |
98 | ); |
99 | ||
100 | static void | |
101 | NetVscOnReceive( | |
3d3b5518 | 102 | struct hv_device *Device, |
fceaf24a HJ |
103 | VMPACKET_DESCRIPTOR *Packet |
104 | ); | |
105 | ||
106 | static void | |
107 | NetVscOnReceiveCompletion( | |
8282c400 | 108 | void * Context |
fceaf24a HJ |
109 | ); |
110 | ||
111 | static void | |
112 | NetVscSendReceiveCompletion( | |
3d3b5518 | 113 | struct hv_device *Device, |
59471438 | 114 | u64 TransactionId |
fceaf24a HJ |
115 | ); |
116 | ||
3d3b5518 | 117 | static inline struct NETVSC_DEVICE *AllocNetDevice(struct hv_device *Device) |
fceaf24a | 118 | { |
d1af1db7 | 119 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 120 | |
d1af1db7 | 121 | netDevice = kzalloc(sizeof(struct NETVSC_DEVICE), GFP_KERNEL); |
fceaf24a HJ |
122 | if (!netDevice) |
123 | return NULL; | |
124 | ||
454f18a9 | 125 | /* Set to 2 to allow both inbound and outbound traffic */ |
f4888417 | 126 | atomic_cmpxchg(&netDevice->RefCount, 0, 2); |
fceaf24a HJ |
127 | |
128 | netDevice->Device = Device; | |
129 | Device->Extension = netDevice; | |
130 | ||
131 | return netDevice; | |
132 | } | |
133 | ||
d1af1db7 | 134 | static inline void FreeNetDevice(struct NETVSC_DEVICE *Device) |
fceaf24a | 135 | { |
f4888417 | 136 | ASSERT(atomic_read(&Device->RefCount) == 0); |
fceaf24a | 137 | Device->Device->Extension = NULL; |
8c69f52a | 138 | kfree(Device); |
fceaf24a HJ |
139 | } |
140 | ||
141 | ||
454f18a9 | 142 | /* Get the net device object iff exists and its refcount > 1 */ |
3d3b5518 | 143 | static inline struct NETVSC_DEVICE *GetOutboundNetDevice(struct hv_device *Device) |
fceaf24a | 144 | { |
d1af1db7 | 145 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 146 | |
d1af1db7 | 147 | netDevice = (struct NETVSC_DEVICE*)Device->Extension; |
f4888417 BP |
148 | if (netDevice && atomic_read(&netDevice->RefCount) > 1) |
149 | atomic_inc(&netDevice->RefCount); | |
fceaf24a | 150 | else |
fceaf24a | 151 | netDevice = NULL; |
fceaf24a HJ |
152 | |
153 | return netDevice; | |
154 | } | |
155 | ||
454f18a9 | 156 | /* Get the net device object iff exists and its refcount > 0 */ |
3d3b5518 | 157 | static inline struct NETVSC_DEVICE *GetInboundNetDevice(struct hv_device *Device) |
fceaf24a | 158 | { |
d1af1db7 | 159 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 160 | |
d1af1db7 | 161 | netDevice = (struct NETVSC_DEVICE*)Device->Extension; |
f4888417 BP |
162 | if (netDevice && atomic_read(&netDevice->RefCount)) |
163 | atomic_inc(&netDevice->RefCount); | |
fceaf24a | 164 | else |
fceaf24a | 165 | netDevice = NULL; |
fceaf24a HJ |
166 | |
167 | return netDevice; | |
168 | } | |
169 | ||
3d3b5518 | 170 | static inline void PutNetDevice(struct hv_device *Device) |
fceaf24a | 171 | { |
d1af1db7 | 172 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 173 | |
d1af1db7 | 174 | netDevice = (struct NETVSC_DEVICE*)Device->Extension; |
fceaf24a HJ |
175 | ASSERT(netDevice); |
176 | ||
f4888417 | 177 | atomic_dec(&netDevice->RefCount); |
fceaf24a HJ |
178 | } |
179 | ||
3d3b5518 | 180 | static inline struct NETVSC_DEVICE *ReleaseOutboundNetDevice(struct hv_device *Device) |
fceaf24a | 181 | { |
d1af1db7 | 182 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 183 | |
d1af1db7 | 184 | netDevice = (struct NETVSC_DEVICE*)Device->Extension; |
fceaf24a HJ |
185 | if (netDevice == NULL) |
186 | return NULL; | |
187 | ||
454f18a9 | 188 | /* Busy wait until the ref drop to 2, then set it to 1 */ |
f4888417 | 189 | while (atomic_cmpxchg(&netDevice->RefCount, 2, 1) != 2) |
fceaf24a | 190 | { |
b4362c9c | 191 | udelay(100); |
fceaf24a HJ |
192 | } |
193 | ||
194 | return netDevice; | |
195 | } | |
196 | ||
3d3b5518 | 197 | static inline struct NETVSC_DEVICE *ReleaseInboundNetDevice(struct hv_device *Device) |
fceaf24a | 198 | { |
d1af1db7 | 199 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 200 | |
d1af1db7 | 201 | netDevice = (struct NETVSC_DEVICE*)Device->Extension; |
fceaf24a HJ |
202 | if (netDevice == NULL) |
203 | return NULL; | |
204 | ||
454f18a9 | 205 | /* Busy wait until the ref drop to 1, then set it to 0 */ |
f4888417 | 206 | while (atomic_cmpxchg(&netDevice->RefCount, 1, 0) != 1) |
fceaf24a | 207 | { |
b4362c9c | 208 | udelay(100); |
fceaf24a HJ |
209 | } |
210 | ||
211 | Device->Extension = NULL; | |
212 | return netDevice; | |
213 | } | |
214 | ||
215 | /*++; | |
216 | ||
217 | ||
218 | Name: | |
219 | NetVscInitialize() | |
220 | ||
221 | Description: | |
222 | Main entry point | |
223 | ||
224 | --*/ | |
225 | int | |
226 | NetVscInitialize( | |
775ef25e | 227 | struct hv_driver *drv |
fceaf24a HJ |
228 | ) |
229 | { | |
230 | NETVSC_DRIVER_OBJECT* driver = (NETVSC_DRIVER_OBJECT*)drv; | |
231 | int ret=0; | |
232 | ||
233 | DPRINT_ENTER(NETVSC); | |
234 | ||
4193d4f4 NP |
235 | DPRINT_DBG(NETVSC, "sizeof(struct hv_netvsc_packet)=%zd, sizeof(NVSP_MESSAGE)=%zd, sizeof(VMTRANSFER_PAGE_PACKET_HEADER)=%zd", |
236 | sizeof(struct hv_netvsc_packet), sizeof(NVSP_MESSAGE), sizeof(VMTRANSFER_PAGE_PACKET_HEADER)); | |
fceaf24a | 237 | |
454f18a9 | 238 | /* Make sure we are at least 2 pages since 1 page is used for control */ |
fceaf24a HJ |
239 | ASSERT(driver->RingBufferSize >= (PAGE_SIZE << 1)); |
240 | ||
241 | drv->name = gDriverName; | |
242 | memcpy(&drv->deviceType, &gNetVscDeviceType, sizeof(GUID)); | |
243 | ||
454f18a9 | 244 | /* Make sure it is set by the caller */ |
fceaf24a HJ |
245 | ASSERT(driver->OnReceiveCallback); |
246 | ASSERT(driver->OnLinkStatusChanged); | |
247 | ||
454f18a9 | 248 | /* Setup the dispatch table */ |
fceaf24a HJ |
249 | driver->Base.OnDeviceAdd = NetVscOnDeviceAdd; |
250 | driver->Base.OnDeviceRemove = NetVscOnDeviceRemove; | |
251 | driver->Base.OnCleanup = NetVscOnCleanup; | |
252 | ||
253 | driver->OnSend = NetVscOnSend; | |
254 | ||
255 | RndisFilterInit(driver); | |
256 | ||
257 | DPRINT_EXIT(NETVSC); | |
258 | ||
259 | return ret; | |
260 | } | |
261 | ||
262 | static int | |
263 | NetVscInitializeReceiveBufferWithNetVsp( | |
3d3b5518 | 264 | struct hv_device *Device |
fceaf24a HJ |
265 | ) |
266 | { | |
267 | int ret=0; | |
d1af1db7 | 268 | struct NETVSC_DEVICE *netDevice; |
fceaf24a HJ |
269 | NVSP_MESSAGE *initPacket; |
270 | ||
271 | DPRINT_ENTER(NETVSC); | |
272 | ||
273 | netDevice = GetOutboundNetDevice(Device); | |
274 | if (!netDevice) | |
275 | { | |
276 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
277 | DPRINT_EXIT(NETVSC); | |
278 | return -1; | |
279 | } | |
280 | ASSERT(netDevice->ReceiveBufferSize > 0); | |
454f18a9 | 281 | ASSERT((netDevice->ReceiveBufferSize & (PAGE_SIZE-1)) == 0); /* page-size grandularity */ |
fceaf24a HJ |
282 | |
283 | netDevice->ReceiveBuffer = PageAlloc(netDevice->ReceiveBufferSize >> PAGE_SHIFT); | |
284 | if (!netDevice->ReceiveBuffer) | |
285 | { | |
286 | DPRINT_ERR(NETVSC, "unable to allocate receive buffer of size %d", netDevice->ReceiveBufferSize); | |
287 | ret = -1; | |
288 | goto Cleanup; | |
289 | } | |
454f18a9 | 290 | ASSERT(((unsigned long)netDevice->ReceiveBuffer & (PAGE_SIZE-1)) == 0); /* page-aligned buffer */ |
fceaf24a HJ |
291 | |
292 | DPRINT_INFO(NETVSC, "Establishing receive buffer's GPADL..."); | |
293 | ||
454f18a9 BP |
294 | /* |
295 | * Establish the gpadl handle for this buffer on this | |
296 | * channel. Note: This call uses the vmbus connection rather | |
297 | * than the channel to establish the gpadl handle. | |
298 | */ | |
fceaf24a HJ |
299 | ret = Device->Driver->VmbusChannelInterface.EstablishGpadl(Device, |
300 | netDevice->ReceiveBuffer, | |
301 | netDevice->ReceiveBufferSize, | |
302 | &netDevice->ReceiveBufferGpadlHandle); | |
303 | ||
304 | if (ret != 0) | |
305 | { | |
306 | DPRINT_ERR(NETVSC, "unable to establish receive buffer's gpadl"); | |
307 | goto Cleanup; | |
308 | } | |
309 | ||
454f18a9 | 310 | /* WaitEventWait(ext->ChannelInitEvent); */ |
fceaf24a | 311 | |
454f18a9 | 312 | /* Notify the NetVsp of the gpadl handle */ |
fceaf24a HJ |
313 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendReceiveBuffer..."); |
314 | ||
315 | initPacket = &netDevice->ChannelInitPacket; | |
316 | ||
317 | memset(initPacket, 0, sizeof(NVSP_MESSAGE)); | |
318 | ||
319 | initPacket->Header.MessageType = NvspMessage1TypeSendReceiveBuffer; | |
320 | initPacket->Messages.Version1Messages.SendReceiveBuffer.GpadlHandle = netDevice->ReceiveBufferGpadlHandle; | |
321 | initPacket->Messages.Version1Messages.SendReceiveBuffer.Id = NETVSC_RECEIVE_BUFFER_ID; | |
322 | ||
454f18a9 | 323 | /* Send the gpadl notification request */ |
fceaf24a HJ |
324 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
325 | initPacket, | |
326 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 327 | (unsigned long)initPacket, |
fceaf24a HJ |
328 | VmbusPacketTypeDataInBand, |
329 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
330 | if (ret != 0) | |
331 | { | |
332 | DPRINT_ERR(NETVSC, "unable to send receive buffer's gpadl to netvsp"); | |
333 | goto Cleanup; | |
334 | } | |
335 | ||
336 | WaitEventWait(netDevice->ChannelInitEvent); | |
337 | ||
454f18a9 | 338 | /* Check the response */ |
fceaf24a HJ |
339 | if (initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Status != NvspStatusSuccess) |
340 | { | |
341 | DPRINT_ERR(NETVSC, | |
342 | "Unable to complete receive buffer initialzation with NetVsp - status %d", | |
343 | initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Status); | |
344 | ret = -1; | |
345 | goto Cleanup; | |
346 | } | |
347 | ||
454f18a9 | 348 | /* Parse the response */ |
fceaf24a HJ |
349 | ASSERT(netDevice->ReceiveSectionCount == 0); |
350 | ASSERT(netDevice->ReceiveSections == NULL); | |
351 | ||
352 | netDevice->ReceiveSectionCount = initPacket->Messages.Version1Messages.SendReceiveBufferComplete.NumSections; | |
353 | ||
e40d37cc | 354 | netDevice->ReceiveSections = kmalloc(netDevice->ReceiveSectionCount * sizeof(NVSP_1_RECEIVE_BUFFER_SECTION), GFP_KERNEL); |
fceaf24a HJ |
355 | if (netDevice->ReceiveSections == NULL) |
356 | { | |
357 | ret = -1; | |
358 | goto Cleanup; | |
359 | } | |
360 | ||
361 | memcpy(netDevice->ReceiveSections, | |
362 | initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Sections, | |
363 | netDevice->ReceiveSectionCount * sizeof(NVSP_1_RECEIVE_BUFFER_SECTION)); | |
364 | ||
365 | DPRINT_INFO(NETVSC, | |
366 | "Receive sections info (count %d, offset %d, endoffset %d, suballoc size %d, num suballocs %d)", | |
367 | netDevice->ReceiveSectionCount, netDevice->ReceiveSections[0].Offset, netDevice->ReceiveSections[0].EndOffset, | |
368 | netDevice->ReceiveSections[0].SubAllocationSize, netDevice->ReceiveSections[0].NumSubAllocations); | |
369 | ||
370 | ||
454f18a9 | 371 | /* For 1st release, there should only be 1 section that represents the entire receive buffer */ |
fceaf24a HJ |
372 | if (netDevice->ReceiveSectionCount != 1 || |
373 | netDevice->ReceiveSections->Offset != 0 ) | |
374 | { | |
375 | ret = -1; | |
376 | goto Cleanup; | |
377 | } | |
378 | ||
379 | goto Exit; | |
380 | ||
381 | Cleanup: | |
382 | NetVscDestroyReceiveBuffer(netDevice); | |
383 | ||
384 | Exit: | |
385 | PutNetDevice(Device); | |
386 | DPRINT_EXIT(NETVSC); | |
387 | return ret; | |
388 | } | |
389 | ||
390 | ||
391 | static int | |
392 | NetVscInitializeSendBufferWithNetVsp( | |
3d3b5518 | 393 | struct hv_device *Device |
fceaf24a HJ |
394 | ) |
395 | { | |
396 | int ret=0; | |
d1af1db7 | 397 | struct NETVSC_DEVICE *netDevice; |
fceaf24a HJ |
398 | NVSP_MESSAGE *initPacket; |
399 | ||
400 | DPRINT_ENTER(NETVSC); | |
401 | ||
402 | netDevice = GetOutboundNetDevice(Device); | |
403 | if (!netDevice) | |
404 | { | |
405 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
406 | DPRINT_EXIT(NETVSC); | |
407 | return -1; | |
408 | } | |
409 | ASSERT(netDevice->SendBufferSize > 0); | |
454f18a9 | 410 | ASSERT((netDevice->SendBufferSize & (PAGE_SIZE-1)) == 0); /* page-size grandularity */ |
fceaf24a HJ |
411 | |
412 | netDevice->SendBuffer = PageAlloc(netDevice->SendBufferSize >> PAGE_SHIFT); | |
413 | if (!netDevice->SendBuffer) | |
414 | { | |
415 | DPRINT_ERR(NETVSC, "unable to allocate send buffer of size %d", netDevice->SendBufferSize); | |
416 | ret = -1; | |
417 | goto Cleanup; | |
418 | } | |
454f18a9 | 419 | ASSERT(((unsigned long)netDevice->SendBuffer & (PAGE_SIZE-1)) == 0); /* page-aligned buffer */ |
fceaf24a HJ |
420 | |
421 | DPRINT_INFO(NETVSC, "Establishing send buffer's GPADL..."); | |
422 | ||
454f18a9 BP |
423 | /* |
424 | * Establish the gpadl handle for this buffer on this | |
425 | * channel. Note: This call uses the vmbus connection rather | |
426 | * than the channel to establish the gpadl handle. | |
427 | */ | |
fceaf24a | 428 | ret = Device->Driver->VmbusChannelInterface.EstablishGpadl(Device, |
454f18a9 BP |
429 | netDevice->SendBuffer, |
430 | netDevice->SendBufferSize, | |
431 | &netDevice->SendBufferGpadlHandle); | |
fceaf24a HJ |
432 | |
433 | if (ret != 0) | |
434 | { | |
435 | DPRINT_ERR(NETVSC, "unable to establish send buffer's gpadl"); | |
436 | goto Cleanup; | |
437 | } | |
438 | ||
454f18a9 | 439 | /* WaitEventWait(ext->ChannelInitEvent); */ |
fceaf24a | 440 | |
454f18a9 | 441 | /* Notify the NetVsp of the gpadl handle */ |
fceaf24a HJ |
442 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendSendBuffer..."); |
443 | ||
444 | initPacket = &netDevice->ChannelInitPacket; | |
445 | ||
446 | memset(initPacket, 0, sizeof(NVSP_MESSAGE)); | |
447 | ||
448 | initPacket->Header.MessageType = NvspMessage1TypeSendSendBuffer; | |
449 | initPacket->Messages.Version1Messages.SendReceiveBuffer.GpadlHandle = netDevice->SendBufferGpadlHandle; | |
450 | initPacket->Messages.Version1Messages.SendReceiveBuffer.Id = NETVSC_SEND_BUFFER_ID; | |
451 | ||
454f18a9 | 452 | /* Send the gpadl notification request */ |
fceaf24a HJ |
453 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
454 | initPacket, | |
455 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 456 | (unsigned long)initPacket, |
fceaf24a HJ |
457 | VmbusPacketTypeDataInBand, |
458 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
459 | if (ret != 0) | |
460 | { | |
461 | DPRINT_ERR(NETVSC, "unable to send receive buffer's gpadl to netvsp"); | |
462 | goto Cleanup; | |
463 | } | |
464 | ||
465 | WaitEventWait(netDevice->ChannelInitEvent); | |
466 | ||
454f18a9 | 467 | /* Check the response */ |
fceaf24a HJ |
468 | if (initPacket->Messages.Version1Messages.SendSendBufferComplete.Status != NvspStatusSuccess) |
469 | { | |
470 | DPRINT_ERR(NETVSC, | |
471 | "Unable to complete send buffer initialzation with NetVsp - status %d", | |
472 | initPacket->Messages.Version1Messages.SendSendBufferComplete.Status); | |
473 | ret = -1; | |
474 | goto Cleanup; | |
475 | } | |
476 | ||
477 | netDevice->SendSectionSize = initPacket->Messages.Version1Messages.SendSendBufferComplete.SectionSize; | |
478 | ||
479 | goto Exit; | |
480 | ||
481 | Cleanup: | |
482 | NetVscDestroySendBuffer(netDevice); | |
483 | ||
484 | Exit: | |
485 | PutNetDevice(Device); | |
486 | DPRINT_EXIT(NETVSC); | |
487 | return ret; | |
488 | } | |
489 | ||
490 | static int | |
491 | NetVscDestroyReceiveBuffer( | |
d1af1db7 | 492 | struct NETVSC_DEVICE *NetDevice |
fceaf24a HJ |
493 | ) |
494 | { | |
495 | NVSP_MESSAGE *revokePacket; | |
496 | int ret=0; | |
497 | ||
498 | ||
499 | DPRINT_ENTER(NETVSC); | |
500 | ||
454f18a9 BP |
501 | /* |
502 | * If we got a section count, it means we received a | |
503 | * SendReceiveBufferComplete msg (ie sent | |
504 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
505 | * to send a revoke msg here | |
506 | */ | |
fceaf24a HJ |
507 | if (NetDevice->ReceiveSectionCount) |
508 | { | |
509 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeRevokeReceiveBuffer..."); | |
510 | ||
454f18a9 | 511 | /* Send the revoke receive buffer */ |
fceaf24a HJ |
512 | revokePacket = &NetDevice->RevokePacket; |
513 | memset(revokePacket, 0, sizeof(NVSP_MESSAGE)); | |
514 | ||
515 | revokePacket->Header.MessageType = NvspMessage1TypeRevokeReceiveBuffer; | |
516 | revokePacket->Messages.Version1Messages.RevokeReceiveBuffer.Id = NETVSC_RECEIVE_BUFFER_ID; | |
517 | ||
518 | ret = NetDevice->Device->Driver->VmbusChannelInterface.SendPacket(NetDevice->Device, | |
519 | revokePacket, | |
520 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 521 | (unsigned long)revokePacket, |
fceaf24a HJ |
522 | VmbusPacketTypeDataInBand, |
523 | 0); | |
454f18a9 BP |
524 | /* |
525 | * If we failed here, we might as well return and | |
526 | * have a leak rather than continue and a bugchk | |
527 | */ | |
fceaf24a HJ |
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 | ||
454f18a9 | 536 | /* Teardown the gpadl on the vsp end */ |
fceaf24a HJ |
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 | ||
454f18a9 | 544 | /* If we failed here, we might as well return and have a leak rather than continue and a bugchk */ |
fceaf24a HJ |
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 | ||
454f18a9 | 558 | /* Free up the receive buffer */ |
fceaf24a HJ |
559 | PageFree(NetDevice->ReceiveBuffer, NetDevice->ReceiveBufferSize >> PAGE_SHIFT); |
560 | NetDevice->ReceiveBuffer = NULL; | |
561 | } | |
562 | ||
563 | if (NetDevice->ReceiveSections) | |
564 | { | |
8c69f52a | 565 | kfree(NetDevice->ReceiveSections); |
fceaf24a HJ |
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( | |
d1af1db7 | 580 | struct NETVSC_DEVICE *NetDevice |
fceaf24a HJ |
581 | ) |
582 | { | |
583 | NVSP_MESSAGE *revokePacket; | |
584 | int ret=0; | |
585 | ||
586 | ||
587 | DPRINT_ENTER(NETVSC); | |
588 | ||
454f18a9 BP |
589 | /* |
590 | * If we got a section count, it means we received a | |
591 | * SendReceiveBufferComplete msg (ie sent | |
592 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
593 | * to send a revoke msg here | |
594 | */ | |
fceaf24a HJ |
595 | if (NetDevice->SendSectionSize) |
596 | { | |
597 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeRevokeSendBuffer..."); | |
598 | ||
454f18a9 | 599 | /* Send the revoke send buffer */ |
fceaf24a HJ |
600 | revokePacket = &NetDevice->RevokePacket; |
601 | memset(revokePacket, 0, sizeof(NVSP_MESSAGE)); | |
602 | ||
603 | revokePacket->Header.MessageType = NvspMessage1TypeRevokeSendBuffer; | |
604 | revokePacket->Messages.Version1Messages.RevokeSendBuffer.Id = NETVSC_SEND_BUFFER_ID; | |
605 | ||
606 | ret = NetDevice->Device->Driver->VmbusChannelInterface.SendPacket(NetDevice->Device, | |
607 | revokePacket, | |
608 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 609 | (unsigned long)revokePacket, |
fceaf24a HJ |
610 | VmbusPacketTypeDataInBand, |
611 | 0); | |
454f18a9 | 612 | /* If we failed here, we might as well return and have a leak rather than continue and a bugchk */ |
fceaf24a HJ |
613 | if (ret != 0) |
614 | { | |
615 | DPRINT_ERR(NETVSC, "unable to send revoke send buffer to netvsp"); | |
616 | DPRINT_EXIT(NETVSC); | |
617 | return -1; | |
618 | } | |
619 | } | |
620 | ||
454f18a9 | 621 | /* Teardown the gpadl on the vsp end */ |
fceaf24a HJ |
622 | if (NetDevice->SendBufferGpadlHandle) |
623 | { | |
624 | DPRINT_INFO(NETVSC, "Tearing down send buffer's GPADL..."); | |
625 | ||
626 | ret = NetDevice->Device->Driver->VmbusChannelInterface.TeardownGpadl(NetDevice->Device, | |
627 | NetDevice->SendBufferGpadlHandle); | |
628 | ||
454f18a9 | 629 | /* If we failed here, we might as well return and have a leak rather than continue and a bugchk */ |
fceaf24a HJ |
630 | if (ret != 0) |
631 | { | |
632 | DPRINT_ERR(NETVSC, "unable to teardown send buffer's gpadl"); | |
633 | DPRINT_EXIT(NETVSC); | |
634 | return -1; | |
635 | } | |
636 | NetDevice->SendBufferGpadlHandle = 0; | |
637 | } | |
638 | ||
639 | if (NetDevice->SendBuffer) | |
640 | { | |
641 | DPRINT_INFO(NETVSC, "Freeing up send buffer..."); | |
642 | ||
454f18a9 | 643 | /* Free up the receive buffer */ |
fceaf24a HJ |
644 | PageFree(NetDevice->SendBuffer, NetDevice->SendBufferSize >> PAGE_SHIFT); |
645 | NetDevice->SendBuffer = NULL; | |
646 | } | |
647 | ||
648 | DPRINT_EXIT(NETVSC); | |
649 | ||
650 | return ret; | |
651 | } | |
652 | ||
653 | ||
654 | ||
655 | static int | |
656 | NetVscConnectToVsp( | |
3d3b5518 | 657 | struct hv_device *Device |
fceaf24a HJ |
658 | ) |
659 | { | |
660 | int ret=0; | |
d1af1db7 | 661 | struct NETVSC_DEVICE *netDevice; |
fceaf24a HJ |
662 | NVSP_MESSAGE *initPacket; |
663 | int ndisVersion; | |
664 | ||
665 | DPRINT_ENTER(NETVSC); | |
666 | ||
667 | netDevice = GetOutboundNetDevice(Device); | |
668 | if (!netDevice) | |
669 | { | |
670 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
671 | DPRINT_EXIT(NETVSC); | |
672 | return -1; | |
673 | } | |
674 | ||
675 | initPacket = &netDevice->ChannelInitPacket; | |
676 | ||
677 | memset(initPacket, 0, sizeof(NVSP_MESSAGE)); | |
678 | initPacket->Header.MessageType = NvspMessageTypeInit; | |
679 | initPacket->Messages.InitMessages.Init.MinProtocolVersion = NVSP_MIN_PROTOCOL_VERSION; | |
680 | initPacket->Messages.InitMessages.Init.MaxProtocolVersion = NVSP_MAX_PROTOCOL_VERSION; | |
681 | ||
682 | DPRINT_INFO(NETVSC, "Sending NvspMessageTypeInit..."); | |
683 | ||
454f18a9 | 684 | /* Send the init request */ |
fceaf24a HJ |
685 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
686 | initPacket, | |
687 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 688 | (unsigned long)initPacket, |
fceaf24a HJ |
689 | VmbusPacketTypeDataInBand, |
690 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
691 | ||
692 | if( ret != 0) | |
693 | { | |
694 | DPRINT_ERR(NETVSC, "unable to send NvspMessageTypeInit"); | |
695 | goto Cleanup; | |
696 | } | |
697 | ||
698 | WaitEventWait(netDevice->ChannelInitEvent); | |
699 | ||
454f18a9 BP |
700 | /* Now, check the response */ |
701 | /* ASSERT(initPacket->Messages.InitMessages.InitComplete.MaximumMdlChainLength <= MAX_MULTIPAGE_BUFFER_COUNT); */ | |
fceaf24a HJ |
702 | DPRINT_INFO(NETVSC, "NvspMessageTypeInit status(%d) max mdl chain (%d)", |
703 | initPacket->Messages.InitMessages.InitComplete.Status, | |
704 | initPacket->Messages.InitMessages.InitComplete.MaximumMdlChainLength); | |
705 | ||
706 | if (initPacket->Messages.InitMessages.InitComplete.Status != NvspStatusSuccess) | |
707 | { | |
708 | DPRINT_ERR(NETVSC, "unable to initialize with netvsp (status 0x%x)", initPacket->Messages.InitMessages.InitComplete.Status); | |
709 | ret = -1; | |
710 | goto Cleanup; | |
711 | } | |
712 | ||
713 | if (initPacket->Messages.InitMessages.InitComplete.NegotiatedProtocolVersion != NVSP_PROTOCOL_VERSION_1) | |
714 | { | |
715 | DPRINT_ERR(NETVSC, "unable to initialize with netvsp (version expected 1 got %d)", | |
716 | initPacket->Messages.InitMessages.InitComplete.NegotiatedProtocolVersion); | |
717 | ret = -1; | |
718 | goto Cleanup; | |
719 | } | |
720 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendNdisVersion..."); | |
721 | ||
454f18a9 | 722 | /* Send the ndis version */ |
fceaf24a HJ |
723 | memset(initPacket, 0, sizeof(NVSP_MESSAGE)); |
724 | ||
725 | ndisVersion = 0x00050000; | |
726 | ||
727 | initPacket->Header.MessageType = NvspMessage1TypeSendNdisVersion; | |
728 | initPacket->Messages.Version1Messages.SendNdisVersion.NdisMajorVersion = (ndisVersion & 0xFFFF0000) >> 16; | |
729 | initPacket->Messages.Version1Messages.SendNdisVersion.NdisMinorVersion = ndisVersion & 0xFFFF; | |
730 | ||
454f18a9 | 731 | /* Send the init request */ |
fceaf24a HJ |
732 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
733 | initPacket, | |
734 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 735 | (unsigned long)initPacket, |
fceaf24a HJ |
736 | VmbusPacketTypeDataInBand, |
737 | 0); | |
738 | if (ret != 0) | |
739 | { | |
740 | DPRINT_ERR(NETVSC, "unable to send NvspMessage1TypeSendNdisVersion"); | |
741 | ret = -1; | |
742 | goto Cleanup; | |
743 | } | |
454f18a9 BP |
744 | /* |
745 | * BUGBUG - We have to wait for the above msg since the | |
746 | * netvsp uses KMCL which acknowledges packet (completion | |
747 | * packet) since our Vmbus always set the | |
748 | * VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED flag | |
749 | */ | |
750 | /* WaitEventWait(NetVscChannel->ChannelInitEvent); */ | |
751 | ||
752 | /* Post the big receive buffer to NetVSP */ | |
fceaf24a HJ |
753 | ret = NetVscInitializeReceiveBufferWithNetVsp(Device); |
754 | if (ret == 0) | |
755 | { | |
756 | ret = NetVscInitializeSendBufferWithNetVsp(Device); | |
757 | } | |
758 | ||
759 | Cleanup: | |
760 | PutNetDevice(Device); | |
761 | DPRINT_EXIT(NETVSC); | |
762 | return ret; | |
763 | } | |
764 | ||
765 | static void | |
766 | NetVscDisconnectFromVsp( | |
d1af1db7 | 767 | struct NETVSC_DEVICE *NetDevice |
fceaf24a HJ |
768 | ) |
769 | { | |
770 | DPRINT_ENTER(NETVSC); | |
771 | ||
772 | NetVscDestroyReceiveBuffer(NetDevice); | |
773 | NetVscDestroySendBuffer(NetDevice); | |
774 | ||
775 | DPRINT_EXIT(NETVSC); | |
776 | } | |
777 | ||
778 | ||
779 | /*++ | |
780 | ||
781 | Name: | |
782 | NetVscOnDeviceAdd() | |
783 | ||
784 | Description: | |
785 | Callback when the device belonging to this driver is added | |
786 | ||
787 | --*/ | |
bd1de709 | 788 | static int |
fceaf24a | 789 | NetVscOnDeviceAdd( |
3d3b5518 | 790 | struct hv_device *Device, |
fceaf24a HJ |
791 | void *AdditionalInfo |
792 | ) | |
793 | { | |
794 | int ret=0; | |
795 | int i; | |
796 | ||
d1af1db7 | 797 | struct NETVSC_DEVICE *netDevice; |
4193d4f4 | 798 | struct hv_netvsc_packet *packet; |
fceaf24a HJ |
799 | LIST_ENTRY *entry; |
800 | ||
801 | NETVSC_DRIVER_OBJECT *netDriver = (NETVSC_DRIVER_OBJECT*) Device->Driver;; | |
802 | ||
803 | DPRINT_ENTER(NETVSC); | |
804 | ||
805 | netDevice = AllocNetDevice(Device); | |
806 | if (!netDevice) | |
807 | { | |
808 | ret = -1; | |
809 | goto Cleanup; | |
810 | } | |
811 | ||
812 | DPRINT_DBG(NETVSC, "netvsc channel object allocated - %p", netDevice); | |
813 | ||
454f18a9 | 814 | /* Initialize the NetVSC channel extension */ |
fceaf24a | 815 | netDevice->ReceiveBufferSize = NETVSC_RECEIVE_BUFFER_SIZE; |
6436873a | 816 | spin_lock_init(&netDevice->receive_packet_list_lock); |
fceaf24a HJ |
817 | |
818 | netDevice->SendBufferSize = NETVSC_SEND_BUFFER_SIZE; | |
819 | ||
820 | INITIALIZE_LIST_HEAD(&netDevice->ReceivePacketList); | |
821 | ||
822 | for (i=0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++) | |
823 | { | |
4193d4f4 | 824 | packet = kzalloc(sizeof(struct hv_netvsc_packet) + (NETVSC_RECEIVE_SG_COUNT* sizeof(PAGE_BUFFER)), GFP_KERNEL); |
fceaf24a HJ |
825 | if (!packet) |
826 | { | |
827 | DPRINT_DBG(NETVSC, "unable to allocate netvsc pkts for receive pool (wanted %d got %d)", NETVSC_RECEIVE_PACKETLIST_COUNT, i); | |
828 | break; | |
829 | } | |
830 | ||
831 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->ListEntry); | |
832 | } | |
833 | netDevice->ChannelInitEvent = WaitEventCreate(); | |
834 | ||
454f18a9 | 835 | /* Open the channel */ |
fceaf24a | 836 | ret = Device->Driver->VmbusChannelInterface.Open(Device, |
454f18a9 BP |
837 | netDriver->RingBufferSize, |
838 | netDriver->RingBufferSize, | |
839 | NULL, 0, | |
840 | NetVscOnChannelCallback, | |
841 | Device | |
842 | ); | |
fceaf24a HJ |
843 | |
844 | if (ret != 0) | |
845 | { | |
846 | DPRINT_ERR(NETVSC, "unable to open channel: %d", ret); | |
847 | ret = -1; | |
848 | goto Cleanup; | |
849 | } | |
850 | ||
454f18a9 | 851 | /* Channel is opened */ |
fceaf24a HJ |
852 | DPRINT_INFO(NETVSC, "*** NetVSC channel opened successfully! ***"); |
853 | ||
454f18a9 | 854 | /* Connect with the NetVsp */ |
fceaf24a HJ |
855 | ret = NetVscConnectToVsp(Device); |
856 | if (ret != 0) | |
857 | { | |
858 | DPRINT_ERR(NETVSC, "unable to connect to NetVSP - %d", ret); | |
859 | ret = -1; | |
860 | goto Close; | |
861 | } | |
862 | ||
863 | DPRINT_INFO(NETVSC, "*** NetVSC channel handshake result - %d ***", ret); | |
864 | ||
865 | DPRINT_EXIT(NETVSC); | |
866 | return ret; | |
867 | ||
868 | Close: | |
454f18a9 | 869 | /* Now, we can close the channel safely */ |
fceaf24a HJ |
870 | Device->Driver->VmbusChannelInterface.Close(Device); |
871 | ||
872 | Cleanup: | |
873 | ||
874 | if (netDevice) | |
875 | { | |
420beac4 | 876 | kfree(netDevice->ChannelInitEvent); |
fceaf24a HJ |
877 | |
878 | while (!IsListEmpty(&netDevice->ReceivePacketList)) | |
879 | { | |
880 | entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList); | |
4193d4f4 | 881 | packet = CONTAINING_RECORD(entry, struct hv_netvsc_packet, ListEntry); |
8c69f52a | 882 | kfree(packet); |
fceaf24a HJ |
883 | } |
884 | ||
fceaf24a HJ |
885 | ReleaseOutboundNetDevice(Device); |
886 | ReleaseInboundNetDevice(Device); | |
887 | ||
888 | FreeNetDevice(netDevice); | |
889 | } | |
890 | ||
891 | DPRINT_EXIT(NETVSC); | |
892 | return ret; | |
893 | } | |
894 | ||
895 | ||
896 | /*++ | |
897 | ||
898 | Name: | |
899 | NetVscOnDeviceRemove() | |
900 | ||
901 | Description: | |
902 | Callback when the root bus device is removed | |
903 | ||
904 | --*/ | |
bd1de709 | 905 | static int |
fceaf24a | 906 | NetVscOnDeviceRemove( |
3d3b5518 | 907 | struct hv_device *Device |
fceaf24a HJ |
908 | ) |
909 | { | |
d1af1db7 | 910 | struct NETVSC_DEVICE *netDevice; |
4193d4f4 | 911 | struct hv_netvsc_packet *netvscPacket; |
fceaf24a HJ |
912 | int ret=0; |
913 | LIST_ENTRY *entry; | |
914 | ||
915 | DPRINT_ENTER(NETVSC); | |
916 | ||
917 | DPRINT_INFO(NETVSC, "Disabling outbound traffic on net device (%p)...", Device->Extension); | |
918 | ||
454f18a9 | 919 | /* Stop outbound traffic ie sends and receives completions */ |
fceaf24a HJ |
920 | netDevice = ReleaseOutboundNetDevice(Device); |
921 | if (!netDevice) | |
922 | { | |
923 | DPRINT_ERR(NETVSC, "No net device present!!"); | |
924 | return -1; | |
925 | } | |
926 | ||
454f18a9 | 927 | /* Wait for all send completions */ |
f4888417 | 928 | while (atomic_read(&netDevice->NumOutstandingSends)) |
fceaf24a | 929 | { |
f4888417 | 930 | DPRINT_INFO(NETVSC, "waiting for %d requests to complete...", atomic_read(&netDevice->NumOutstandingSends)); |
fceaf24a | 931 | |
b4362c9c | 932 | udelay(100); |
fceaf24a HJ |
933 | } |
934 | ||
935 | DPRINT_INFO(NETVSC, "Disconnecting from netvsp..."); | |
936 | ||
937 | NetVscDisconnectFromVsp(netDevice); | |
938 | ||
939 | DPRINT_INFO(NETVSC, "Disabling inbound traffic on net device (%p)...", Device->Extension); | |
940 | ||
454f18a9 | 941 | /* Stop inbound traffic ie receives and sends completions */ |
fceaf24a HJ |
942 | netDevice = ReleaseInboundNetDevice(Device); |
943 | ||
454f18a9 | 944 | /* At this point, no one should be accessing netDevice except in here */ |
fceaf24a HJ |
945 | DPRINT_INFO(NETVSC, "net device (%p) safe to remove", netDevice); |
946 | ||
454f18a9 | 947 | /* Now, we can close the channel safely */ |
fceaf24a HJ |
948 | Device->Driver->VmbusChannelInterface.Close(Device); |
949 | ||
454f18a9 | 950 | /* Release all resources */ |
fceaf24a HJ |
951 | while (!IsListEmpty(&netDevice->ReceivePacketList)) |
952 | { | |
953 | entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList); | |
4193d4f4 | 954 | netvscPacket = CONTAINING_RECORD(entry, struct hv_netvsc_packet, ListEntry); |
fceaf24a | 955 | |
8c69f52a | 956 | kfree(netvscPacket); |
fceaf24a HJ |
957 | } |
958 | ||
420beac4 | 959 | kfree(netDevice->ChannelInitEvent); |
fceaf24a HJ |
960 | FreeNetDevice(netDevice); |
961 | ||
962 | DPRINT_EXIT(NETVSC); | |
963 | return ret; | |
964 | } | |
965 | ||
966 | ||
967 | ||
968 | /*++ | |
969 | ||
970 | Name: | |
971 | NetVscOnCleanup() | |
972 | ||
973 | Description: | |
974 | Perform any cleanup when the driver is removed | |
975 | ||
976 | --*/ | |
bd1de709 | 977 | static void |
fceaf24a | 978 | NetVscOnCleanup( |
775ef25e | 979 | struct hv_driver *drv |
fceaf24a HJ |
980 | ) |
981 | { | |
982 | DPRINT_ENTER(NETVSC); | |
983 | ||
984 | DPRINT_EXIT(NETVSC); | |
985 | } | |
986 | ||
987 | static void | |
988 | NetVscOnSendCompletion( | |
3d3b5518 | 989 | struct hv_device *Device, |
fceaf24a HJ |
990 | VMPACKET_DESCRIPTOR *Packet |
991 | ) | |
992 | { | |
d1af1db7 | 993 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 994 | NVSP_MESSAGE *nvspPacket; |
4193d4f4 | 995 | struct hv_netvsc_packet *nvscPacket; |
fceaf24a HJ |
996 | |
997 | DPRINT_ENTER(NETVSC); | |
998 | ||
999 | netDevice = GetInboundNetDevice(Device); | |
1000 | if (!netDevice) | |
1001 | { | |
1002 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
1003 | DPRINT_EXIT(NETVSC); | |
1004 | return; | |
1005 | } | |
1006 | ||
c4b0bc94 | 1007 | nvspPacket = (NVSP_MESSAGE*)((unsigned long)Packet + (Packet->DataOffset8 << 3)); |
fceaf24a HJ |
1008 | |
1009 | DPRINT_DBG(NETVSC, "send completion packet - type %d", nvspPacket->Header.MessageType); | |
1010 | ||
1011 | if (nvspPacket->Header.MessageType == NvspMessageTypeInitComplete || | |
1012 | nvspPacket->Header.MessageType == NvspMessage1TypeSendReceiveBufferComplete || | |
1013 | nvspPacket->Header.MessageType == NvspMessage1TypeSendSendBufferComplete) | |
1014 | { | |
454f18a9 | 1015 | /* Copy the response back */ |
fceaf24a HJ |
1016 | memcpy(&netDevice->ChannelInitPacket, nvspPacket, sizeof(NVSP_MESSAGE)); |
1017 | WaitEventSet(netDevice->ChannelInitEvent); | |
1018 | } | |
1019 | else if (nvspPacket->Header.MessageType == NvspMessage1TypeSendRNDISPacketComplete) | |
1020 | { | |
454f18a9 | 1021 | /* Get the send context */ |
4193d4f4 | 1022 | nvscPacket = (struct hv_netvsc_packet *)(unsigned long)Packet->TransactionId; |
fceaf24a HJ |
1023 | ASSERT(nvscPacket); |
1024 | ||
454f18a9 | 1025 | /* Notify the layer above us */ |
fceaf24a HJ |
1026 | nvscPacket->Completion.Send.OnSendCompletion(nvscPacket->Completion.Send.SendCompletionContext); |
1027 | ||
f4888417 | 1028 | atomic_dec(&netDevice->NumOutstandingSends); |
fceaf24a HJ |
1029 | } |
1030 | else | |
1031 | { | |
1032 | DPRINT_ERR(NETVSC, "Unknown send completion packet type - %d received!!", nvspPacket->Header.MessageType); | |
1033 | } | |
1034 | ||
1035 | PutNetDevice(Device); | |
1036 | DPRINT_EXIT(NETVSC); | |
1037 | } | |
1038 | ||
1039 | ||
1040 | ||
1041 | static int | |
1042 | NetVscOnSend( | |
3d3b5518 | 1043 | struct hv_device *Device, |
4193d4f4 | 1044 | struct hv_netvsc_packet *Packet |
fceaf24a HJ |
1045 | ) |
1046 | { | |
d1af1db7 | 1047 | struct NETVSC_DEVICE *netDevice; |
fceaf24a HJ |
1048 | int ret=0; |
1049 | ||
1050 | NVSP_MESSAGE sendMessage; | |
1051 | ||
1052 | DPRINT_ENTER(NETVSC); | |
1053 | ||
1054 | netDevice = GetOutboundNetDevice(Device); | |
1055 | if (!netDevice) | |
1056 | { | |
1057 | DPRINT_ERR(NETVSC, "net device (%p) shutting down...ignoring outbound packets", netDevice); | |
1058 | DPRINT_EXIT(NETVSC); | |
1059 | return -2; | |
1060 | } | |
1061 | ||
1062 | sendMessage.Header.MessageType = NvspMessage1TypeSendRNDISPacket; | |
1063 | if (Packet->IsDataPacket) | |
454f18a9 | 1064 | sendMessage.Messages.Version1Messages.SendRNDISPacket.ChannelType = 0;/* 0 is RMC_DATA; */ |
fceaf24a | 1065 | else |
454f18a9 | 1066 | sendMessage.Messages.Version1Messages.SendRNDISPacket.ChannelType = 1;/* 1 is RMC_CONTROL; */ |
fceaf24a | 1067 | |
454f18a9 | 1068 | /* Not using send buffer section */ |
fceaf24a HJ |
1069 | sendMessage.Messages.Version1Messages.SendRNDISPacket.SendBufferSectionIndex = 0xFFFFFFFF; |
1070 | sendMessage.Messages.Version1Messages.SendRNDISPacket.SendBufferSectionSize = 0; | |
1071 | ||
1072 | if (Packet->PageBufferCount) | |
1073 | { | |
1074 | ret = Device->Driver->VmbusChannelInterface.SendPacketPageBuffer(Device, | |
1075 | Packet->PageBuffers, | |
1076 | Packet->PageBufferCount, | |
1077 | &sendMessage, | |
1078 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 1079 | (unsigned long)Packet); |
fceaf24a HJ |
1080 | } |
1081 | else | |
1082 | { | |
1083 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
1084 | &sendMessage, | |
1085 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 1086 | (unsigned long)Packet, |
fceaf24a HJ |
1087 | VmbusPacketTypeDataInBand, |
1088 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
1089 | ||
1090 | } | |
1091 | ||
1092 | if (ret != 0) | |
1093 | { | |
1094 | DPRINT_ERR(NETVSC, "Unable to send packet %p ret %d", Packet, ret); | |
1095 | } | |
1096 | ||
f4888417 | 1097 | atomic_inc(&netDevice->NumOutstandingSends); |
fceaf24a HJ |
1098 | PutNetDevice(Device); |
1099 | ||
1100 | DPRINT_EXIT(NETVSC); | |
1101 | return ret; | |
1102 | } | |
1103 | ||
1104 | ||
1105 | static void | |
1106 | NetVscOnReceive( | |
3d3b5518 | 1107 | struct hv_device *Device, |
fceaf24a HJ |
1108 | VMPACKET_DESCRIPTOR *Packet |
1109 | ) | |
1110 | { | |
d1af1db7 | 1111 | struct NETVSC_DEVICE *netDevice; |
fceaf24a HJ |
1112 | VMTRANSFER_PAGE_PACKET_HEADER *vmxferpagePacket; |
1113 | NVSP_MESSAGE *nvspPacket; | |
4193d4f4 | 1114 | struct hv_netvsc_packet *netvscPacket=NULL; |
fceaf24a | 1115 | LIST_ENTRY* entry; |
c4b0bc94 GKH |
1116 | unsigned long start; |
1117 | unsigned long end, endVirtual; | |
454f18a9 | 1118 | /* NETVSC_DRIVER_OBJECT *netvscDriver; */ |
fceaf24a HJ |
1119 | XFERPAGE_PACKET *xferpagePacket=NULL; |
1120 | LIST_ENTRY listHead; | |
1121 | ||
1122 | int i=0, j=0; | |
1123 | int count=0, bytesRemain=0; | |
6436873a | 1124 | unsigned long flags; |
fceaf24a HJ |
1125 | |
1126 | DPRINT_ENTER(NETVSC); | |
1127 | ||
1128 | netDevice = GetInboundNetDevice(Device); | |
1129 | if (!netDevice) | |
1130 | { | |
1131 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
1132 | DPRINT_EXIT(NETVSC); | |
1133 | return; | |
1134 | } | |
1135 | ||
454f18a9 | 1136 | /* All inbound packets other than send completion should be xfer page packet */ |
fceaf24a HJ |
1137 | if (Packet->Type != VmbusPacketTypeDataUsingTransferPages) |
1138 | { | |
1139 | DPRINT_ERR(NETVSC, "Unknown packet type received - %d", Packet->Type); | |
1140 | PutNetDevice(Device); | |
1141 | return; | |
1142 | } | |
1143 | ||
c4b0bc94 | 1144 | nvspPacket = (NVSP_MESSAGE*)((unsigned long)Packet + (Packet->DataOffset8 << 3)); |
fceaf24a | 1145 | |
454f18a9 | 1146 | /* Make sure this is a valid nvsp packet */ |
fceaf24a HJ |
1147 | if (nvspPacket->Header.MessageType != NvspMessage1TypeSendRNDISPacket ) |
1148 | { | |
1149 | DPRINT_ERR(NETVSC, "Unknown nvsp packet type received - %d", nvspPacket->Header.MessageType); | |
1150 | PutNetDevice(Device); | |
1151 | return; | |
1152 | } | |
1153 | ||
1154 | DPRINT_DBG(NETVSC, "NVSP packet received - type %d", nvspPacket->Header.MessageType); | |
1155 | ||
1156 | vmxferpagePacket = (VMTRANSFER_PAGE_PACKET_HEADER*)Packet; | |
1157 | ||
1158 | if (vmxferpagePacket->TransferPageSetId != NETVSC_RECEIVE_BUFFER_ID) | |
1159 | { | |
1160 | DPRINT_ERR(NETVSC, "Invalid xfer page set id - expecting %x got %x", NETVSC_RECEIVE_BUFFER_ID, vmxferpagePacket->TransferPageSetId); | |
1161 | PutNetDevice(Device); | |
1162 | return; | |
1163 | } | |
1164 | ||
1165 | DPRINT_DBG(NETVSC, "xfer page - range count %d", vmxferpagePacket->RangeCount); | |
1166 | ||
1167 | INITIALIZE_LIST_HEAD(&listHead); | |
1168 | ||
454f18a9 BP |
1169 | /* |
1170 | * Grab free packets (range count + 1) to represent this xfer | |
1171 | * page packet. +1 to represent the xfer page packet itself. | |
1172 | * We grab it here so that we know exactly how many we can | |
1173 | * fulfil | |
1174 | */ | |
6436873a | 1175 | spin_lock_irqsave(&netDevice->receive_packet_list_lock, flags); |
fceaf24a HJ |
1176 | while (!IsListEmpty(&netDevice->ReceivePacketList)) |
1177 | { | |
1178 | entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList); | |
4193d4f4 | 1179 | netvscPacket = CONTAINING_RECORD(entry, struct hv_netvsc_packet, ListEntry); |
fceaf24a HJ |
1180 | |
1181 | INSERT_TAIL_LIST(&listHead, &netvscPacket->ListEntry); | |
1182 | ||
1183 | if (++count == vmxferpagePacket->RangeCount + 1) | |
1184 | break; | |
1185 | } | |
6436873a | 1186 | spin_unlock_irqrestore(&netDevice->receive_packet_list_lock, flags); |
fceaf24a | 1187 | |
454f18a9 BP |
1188 | /* |
1189 | * We need at least 2 netvsc pkts (1 to represent the xfer | |
1190 | * page and at least 1 for the range) i.e. we can handled | |
1191 | * some of the xfer page packet ranges... | |
1192 | */ | |
fceaf24a HJ |
1193 | if (count < 2) |
1194 | { | |
1195 | DPRINT_ERR(NETVSC, "Got only %d netvsc pkt...needed %d pkts. Dropping this xfer page packet completely!", count, vmxferpagePacket->RangeCount+1); | |
1196 | ||
454f18a9 | 1197 | /* Return it to the freelist */ |
6436873a | 1198 | spin_lock_irqsave(&netDevice->receive_packet_list_lock, flags); |
fceaf24a HJ |
1199 | for (i=count; i != 0; i--) |
1200 | { | |
1201 | entry = REMOVE_HEAD_LIST(&listHead); | |
4193d4f4 | 1202 | netvscPacket = CONTAINING_RECORD(entry, struct hv_netvsc_packet, ListEntry); |
fceaf24a HJ |
1203 | |
1204 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &netvscPacket->ListEntry); | |
1205 | } | |
6436873a | 1206 | spin_unlock_irqrestore(&netDevice->receive_packet_list_lock, flags); |
fceaf24a HJ |
1207 | |
1208 | NetVscSendReceiveCompletion(Device, vmxferpagePacket->d.TransactionId); | |
1209 | ||
1210 | PutNetDevice(Device); | |
1211 | return; | |
1212 | } | |
1213 | ||
454f18a9 | 1214 | /* Remove the 1st packet to represent the xfer page packet itself */ |
fceaf24a HJ |
1215 | entry = REMOVE_HEAD_LIST(&listHead); |
1216 | xferpagePacket = CONTAINING_RECORD(entry, XFERPAGE_PACKET, ListEntry); | |
454f18a9 | 1217 | xferpagePacket->Count = count - 1; /* This is how much we can satisfy */ |
fceaf24a HJ |
1218 | ASSERT(xferpagePacket->Count > 0 && xferpagePacket->Count <= vmxferpagePacket->RangeCount); |
1219 | ||
1220 | if (xferpagePacket->Count != vmxferpagePacket->RangeCount) | |
1221 | { | |
1222 | DPRINT_INFO(NETVSC, "Needed %d netvsc pkts to satisy this xfer page...got %d", vmxferpagePacket->RangeCount, xferpagePacket->Count); | |
1223 | } | |
1224 | ||
454f18a9 | 1225 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
fceaf24a HJ |
1226 | for (i=0; i < (count - 1); i++) |
1227 | { | |
1228 | entry = REMOVE_HEAD_LIST(&listHead); | |
4193d4f4 | 1229 | netvscPacket = CONTAINING_RECORD(entry, struct hv_netvsc_packet, ListEntry); |
fceaf24a | 1230 | |
454f18a9 | 1231 | /* Initialize the netvsc packet */ |
fceaf24a HJ |
1232 | netvscPacket->XferPagePacket = xferpagePacket; |
1233 | netvscPacket->Completion.Recv.OnReceiveCompletion = NetVscOnReceiveCompletion; | |
1234 | netvscPacket->Completion.Recv.ReceiveCompletionContext = netvscPacket; | |
1235 | netvscPacket->Device = Device; | |
454f18a9 | 1236 | netvscPacket->Completion.Recv.ReceiveCompletionTid = vmxferpagePacket->d.TransactionId; /* Save this so that we can send it back */ |
fceaf24a HJ |
1237 | |
1238 | netvscPacket->TotalDataBufferLength = vmxferpagePacket->Ranges[i].ByteCount; | |
1239 | netvscPacket->PageBufferCount = 1; | |
1240 | ||
1241 | ASSERT(vmxferpagePacket->Ranges[i].ByteOffset + vmxferpagePacket->Ranges[i].ByteCount < netDevice->ReceiveBufferSize); | |
1242 | ||
1243 | netvscPacket->PageBuffers[0].Length = vmxferpagePacket->Ranges[i].ByteCount; | |
1244 | ||
fa56d361 | 1245 | start = virt_to_phys((void*)((unsigned long)netDevice->ReceiveBuffer + vmxferpagePacket->Ranges[i].ByteOffset)); |
fceaf24a HJ |
1246 | |
1247 | netvscPacket->PageBuffers[0].Pfn = start >> PAGE_SHIFT; | |
c4b0bc94 | 1248 | endVirtual = (unsigned long)netDevice->ReceiveBuffer |
fceaf24a HJ |
1249 | + vmxferpagePacket->Ranges[i].ByteOffset |
1250 | + vmxferpagePacket->Ranges[i].ByteCount -1; | |
fa56d361 | 1251 | end = virt_to_phys((void*)endVirtual); |
fceaf24a | 1252 | |
454f18a9 | 1253 | /* Calculate the page relative offset */ |
fceaf24a HJ |
1254 | netvscPacket->PageBuffers[0].Offset = vmxferpagePacket->Ranges[i].ByteOffset & (PAGE_SIZE -1); |
1255 | if ((end >> PAGE_SHIFT) != (start>>PAGE_SHIFT)) { | |
454f18a9 | 1256 | /* Handle frame across multiple pages: */ |
fceaf24a HJ |
1257 | netvscPacket->PageBuffers[0].Length = |
1258 | (netvscPacket->PageBuffers[0].Pfn <<PAGE_SHIFT) + PAGE_SIZE - start; | |
1259 | bytesRemain = netvscPacket->TotalDataBufferLength - netvscPacket->PageBuffers[0].Length; | |
1260 | for (j=1; j<NETVSC_PACKET_MAXPAGE; j++) { | |
1261 | netvscPacket->PageBuffers[j].Offset = 0; | |
1262 | if (bytesRemain <= PAGE_SIZE) { | |
1263 | netvscPacket->PageBuffers[j].Length = bytesRemain; | |
1264 | bytesRemain = 0; | |
1265 | } else { | |
1266 | netvscPacket->PageBuffers[j].Length = PAGE_SIZE; | |
1267 | bytesRemain -= PAGE_SIZE; | |
1268 | } | |
1269 | netvscPacket->PageBuffers[j].Pfn = | |
fa56d361 | 1270 | virt_to_phys((void*)(endVirtual - bytesRemain)) >> PAGE_SHIFT; |
fceaf24a HJ |
1271 | netvscPacket->PageBufferCount++; |
1272 | if (bytesRemain == 0) | |
1273 | break; | |
1274 | } | |
1275 | ASSERT(bytesRemain == 0); | |
1276 | } | |
1277 | DPRINT_DBG(NETVSC, "[%d] - (abs offset %u len %u) => (pfn %llx, offset %u, len %u)", | |
1278 | i, | |
1279 | vmxferpagePacket->Ranges[i].ByteOffset, | |
1280 | vmxferpagePacket->Ranges[i].ByteCount, | |
1281 | netvscPacket->PageBuffers[0].Pfn, | |
1282 | netvscPacket->PageBuffers[0].Offset, | |
1283 | netvscPacket->PageBuffers[0].Length); | |
1284 | ||
454f18a9 | 1285 | /* Pass it to the upper layer */ |
fceaf24a HJ |
1286 | ((NETVSC_DRIVER_OBJECT*)Device->Driver)->OnReceiveCallback(Device, netvscPacket); |
1287 | ||
1288 | NetVscOnReceiveCompletion(netvscPacket->Completion.Recv.ReceiveCompletionContext); | |
1289 | } | |
1290 | ||
1291 | ASSERT(IsListEmpty(&listHead)); | |
1292 | ||
1293 | PutNetDevice(Device); | |
1294 | DPRINT_EXIT(NETVSC); | |
1295 | } | |
1296 | ||
1297 | ||
1298 | static void | |
1299 | NetVscSendReceiveCompletion( | |
3d3b5518 | 1300 | struct hv_device *Device, |
59471438 | 1301 | u64 TransactionId |
fceaf24a HJ |
1302 | ) |
1303 | { | |
1304 | NVSP_MESSAGE recvcompMessage; | |
1305 | int retries=0; | |
1306 | int ret=0; | |
1307 | ||
1308 | DPRINT_DBG(NETVSC, "Sending receive completion pkt - %llx", TransactionId); | |
1309 | ||
1310 | recvcompMessage.Header.MessageType = NvspMessage1TypeSendRNDISPacketComplete; | |
1311 | ||
454f18a9 | 1312 | /* FIXME: Pass in the status */ |
fceaf24a HJ |
1313 | recvcompMessage.Messages.Version1Messages.SendRNDISPacketComplete.Status = NvspStatusSuccess; |
1314 | ||
1315 | retry_send_cmplt: | |
454f18a9 | 1316 | /* Send the completion */ |
fceaf24a HJ |
1317 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
1318 | &recvcompMessage, | |
1319 | sizeof(NVSP_MESSAGE), | |
1320 | TransactionId, | |
1321 | VmbusPacketTypeCompletion, | |
1322 | 0); | |
454f18a9 | 1323 | if (ret == 0) /* success */ |
fceaf24a | 1324 | { |
454f18a9 | 1325 | /* no-op */ |
fceaf24a | 1326 | } |
454f18a9 | 1327 | else if (ret == -1) /* no more room...wait a bit and attempt to retry 3 times */ |
fceaf24a HJ |
1328 | { |
1329 | retries++; | |
1330 | DPRINT_ERR(NETVSC, "unable to send receive completion pkt (tid %llx)...retrying %d", TransactionId, retries); | |
1331 | ||
1332 | if (retries < 4) | |
1333 | { | |
b4362c9c | 1334 | udelay(100); |
fceaf24a HJ |
1335 | goto retry_send_cmplt; |
1336 | } | |
1337 | else | |
1338 | { | |
1339 | DPRINT_ERR(NETVSC, "unable to send receive completion pkt (tid %llx)...give up retrying", TransactionId); | |
1340 | } | |
1341 | } | |
1342 | else | |
1343 | { | |
1344 | DPRINT_ERR(NETVSC, "unable to send receive completion pkt - %llx", TransactionId); | |
1345 | } | |
1346 | } | |
1347 | ||
454f18a9 | 1348 | /* Send a receive completion packet to RNDIS device (ie NetVsp) */ |
fceaf24a HJ |
1349 | static void |
1350 | NetVscOnReceiveCompletion( | |
8282c400 | 1351 | void * Context) |
fceaf24a | 1352 | { |
4193d4f4 | 1353 | struct hv_netvsc_packet *packet = (struct hv_netvsc_packet*)Context; |
3d3b5518 | 1354 | struct hv_device *device = (struct hv_device*)packet->Device; |
d1af1db7 | 1355 | struct NETVSC_DEVICE *netDevice; |
59471438 | 1356 | u64 transactionId=0; |
0e727613 | 1357 | bool fSendReceiveComp = false; |
6436873a | 1358 | unsigned long flags; |
fceaf24a HJ |
1359 | |
1360 | DPRINT_ENTER(NETVSC); | |
1361 | ||
1362 | ASSERT(packet->XferPagePacket); | |
1363 | ||
454f18a9 BP |
1364 | /* Even though it seems logical to do a GetOutboundNetDevice() here to send out receive completion, */ |
1365 | /* we are using GetInboundNetDevice() since we may have disable outbound traffic already. */ | |
fceaf24a HJ |
1366 | netDevice = GetInboundNetDevice(device); |
1367 | if (!netDevice) | |
1368 | { | |
1369 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
1370 | DPRINT_EXIT(NETVSC); | |
1371 | return; | |
1372 | } | |
1373 | ||
454f18a9 | 1374 | /* Overloading use of the lock. */ |
6436873a | 1375 | spin_lock_irqsave(&netDevice->receive_packet_list_lock, flags); |
fceaf24a HJ |
1376 | |
1377 | ASSERT(packet->XferPagePacket->Count > 0); | |
1378 | packet->XferPagePacket->Count--; | |
1379 | ||
454f18a9 BP |
1380 | /* Last one in the line that represent 1 xfer page packet. */ |
1381 | /* Return the xfer page packet itself to the freelist */ | |
fceaf24a HJ |
1382 | if (packet->XferPagePacket->Count == 0) |
1383 | { | |
0e727613 | 1384 | fSendReceiveComp = true; |
fceaf24a HJ |
1385 | transactionId = packet->Completion.Recv.ReceiveCompletionTid; |
1386 | ||
1387 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->XferPagePacket->ListEntry); | |
1388 | } | |
1389 | ||
454f18a9 | 1390 | /* Put the packet back */ |
fceaf24a | 1391 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->ListEntry); |
6436873a | 1392 | spin_unlock_irqrestore(&netDevice->receive_packet_list_lock, flags); |
fceaf24a | 1393 | |
454f18a9 | 1394 | /* Send a receive completion for the xfer page packet */ |
fceaf24a HJ |
1395 | if (fSendReceiveComp) |
1396 | { | |
1397 | NetVscSendReceiveCompletion(device, transactionId); | |
1398 | } | |
1399 | ||
1400 | PutNetDevice(device); | |
1401 | DPRINT_EXIT(NETVSC); | |
1402 | } | |
1403 | ||
1404 | ||
1405 | ||
1406 | void | |
1407 | NetVscOnChannelCallback( | |
8282c400 | 1408 | void * Context |
fceaf24a HJ |
1409 | ) |
1410 | { | |
1411 | const int netPacketSize=2048; | |
1412 | int ret=0; | |
3d3b5518 | 1413 | struct hv_device *device=(struct hv_device*)Context; |
d1af1db7 | 1414 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 1415 | |
4d643114 | 1416 | u32 bytesRecvd; |
59471438 GKH |
1417 | u64 requestId; |
1418 | unsigned char packet[netPacketSize]; | |
fceaf24a | 1419 | VMPACKET_DESCRIPTOR *desc; |
59471438 | 1420 | unsigned char *buffer=packet; |
fceaf24a HJ |
1421 | int bufferlen=netPacketSize; |
1422 | ||
1423 | ||
1424 | DPRINT_ENTER(NETVSC); | |
1425 | ||
1426 | ASSERT(device); | |
1427 | ||
1428 | netDevice = GetInboundNetDevice(device); | |
1429 | if (!netDevice) | |
1430 | { | |
1431 | DPRINT_ERR(NETVSC, "net device (%p) shutting down...ignoring inbound packets", netDevice); | |
1432 | DPRINT_EXIT(NETVSC); | |
1433 | return; | |
1434 | } | |
1435 | ||
1436 | do | |
1437 | { | |
1438 | ret = device->Driver->VmbusChannelInterface.RecvPacketRaw(device, | |
1439 | buffer, | |
1440 | bufferlen, | |
1441 | &bytesRecvd, | |
1442 | &requestId); | |
1443 | ||
1444 | if (ret == 0) | |
1445 | { | |
1446 | if (bytesRecvd > 0) | |
1447 | { | |
1448 | DPRINT_DBG(NETVSC, "receive %d bytes, tid %llx", bytesRecvd, requestId); | |
1449 | ||
1450 | desc = (VMPACKET_DESCRIPTOR*)buffer; | |
1451 | switch (desc->Type) | |
1452 | { | |
1453 | case VmbusPacketTypeCompletion: | |
1454 | NetVscOnSendCompletion(device, desc); | |
1455 | break; | |
1456 | ||
1457 | case VmbusPacketTypeDataUsingTransferPages: | |
1458 | NetVscOnReceive(device, desc); | |
1459 | break; | |
1460 | ||
1461 | default: | |
1462 | DPRINT_ERR(NETVSC, "unhandled packet type %d, tid %llx len %d\n", desc->Type, requestId, bytesRecvd); | |
1463 | break; | |
1464 | } | |
1465 | ||
454f18a9 | 1466 | /* reset */ |
fceaf24a HJ |
1467 | if (bufferlen > netPacketSize) |
1468 | { | |
8c69f52a | 1469 | kfree(buffer); |
fceaf24a HJ |
1470 | |
1471 | buffer = packet; | |
1472 | bufferlen = netPacketSize; | |
1473 | } | |
1474 | } | |
1475 | else | |
1476 | { | |
454f18a9 | 1477 | /* DPRINT_DBG(NETVSC, "nothing else to read..."); */ |
fceaf24a | 1478 | |
454f18a9 | 1479 | /* reset */ |
fceaf24a HJ |
1480 | if (bufferlen > netPacketSize) |
1481 | { | |
8c69f52a | 1482 | kfree(buffer); |
fceaf24a HJ |
1483 | |
1484 | buffer = packet; | |
1485 | bufferlen = netPacketSize; | |
1486 | } | |
1487 | ||
1488 | break; | |
1489 | } | |
1490 | } | |
454f18a9 | 1491 | else if (ret == -2) /* Handle large packet */ |
fceaf24a | 1492 | { |
0a72f3cf | 1493 | buffer = kmalloc(bytesRecvd, GFP_ATOMIC); |
fceaf24a HJ |
1494 | if (buffer == NULL) |
1495 | { | |
454f18a9 | 1496 | /* Try again next time around */ |
fceaf24a HJ |
1497 | DPRINT_ERR(NETVSC, "unable to allocate buffer of size (%d)!!", bytesRecvd); |
1498 | break; | |
1499 | } | |
1500 | ||
1501 | bufferlen = bytesRecvd; | |
1502 | } | |
1503 | else | |
1504 | { | |
1505 | ASSERT(0); | |
1506 | } | |
1507 | } while (1); | |
1508 | ||
1509 | PutNetDevice(device); | |
1510 | DPRINT_EXIT(NETVSC); | |
1511 | return; | |
1512 | } |