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> |
4983b39a | 27 | #include "osd.h" |
c86f3e2a | 28 | #include "include/logging.h" |
fceaf24a HJ |
29 | #include "NetVsc.h" |
30 | #include "RndisFilter.h" | |
31 | ||
32 | ||
454f18a9 | 33 | /* Globals */ |
fceaf24a HJ |
34 | static const char* gDriverName="netvsc"; |
35 | ||
454f18a9 | 36 | /* {F8615163-DF3E-46c5-913F-F2D2F965ED0E} */ |
fceaf24a HJ |
37 | static const GUID gNetVscDeviceType={ |
38 | .Data = {0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E} | |
39 | }; | |
40 | ||
41 | ||
454f18a9 | 42 | /* Internal routines */ |
fceaf24a HJ |
43 | static int |
44 | NetVscOnDeviceAdd( | |
3d3b5518 | 45 | struct hv_device *Device, |
fceaf24a HJ |
46 | void *AdditionalInfo |
47 | ); | |
48 | ||
49 | static int | |
50 | NetVscOnDeviceRemove( | |
3d3b5518 | 51 | struct hv_device *Device |
fceaf24a HJ |
52 | ); |
53 | ||
54 | static void | |
55 | NetVscOnCleanup( | |
775ef25e | 56 | struct hv_driver *Driver |
fceaf24a HJ |
57 | ); |
58 | ||
59 | static void | |
60 | NetVscOnChannelCallback( | |
8282c400 | 61 | void * context |
fceaf24a HJ |
62 | ); |
63 | ||
64 | static int | |
65 | NetVscInitializeSendBufferWithNetVsp( | |
3d3b5518 | 66 | struct hv_device *Device |
fceaf24a HJ |
67 | ); |
68 | ||
69 | static int | |
70 | NetVscInitializeReceiveBufferWithNetVsp( | |
3d3b5518 | 71 | struct hv_device *Device |
fceaf24a HJ |
72 | ); |
73 | ||
74 | static int | |
75 | NetVscDestroySendBuffer( | |
d1af1db7 | 76 | struct NETVSC_DEVICE *NetDevice |
fceaf24a HJ |
77 | ); |
78 | ||
79 | static int | |
80 | NetVscDestroyReceiveBuffer( | |
d1af1db7 | 81 | struct NETVSC_DEVICE *NetDevice |
fceaf24a HJ |
82 | ); |
83 | ||
84 | static int | |
85 | NetVscConnectToVsp( | |
3d3b5518 | 86 | struct hv_device *Device |
fceaf24a HJ |
87 | ); |
88 | ||
89 | static void | |
90 | NetVscOnSendCompletion( | |
3d3b5518 | 91 | struct hv_device *Device, |
fceaf24a HJ |
92 | VMPACKET_DESCRIPTOR *Packet |
93 | ); | |
94 | ||
95 | static int | |
96 | NetVscOnSend( | |
3d3b5518 | 97 | struct hv_device *Device, |
4193d4f4 | 98 | struct hv_netvsc_packet *Packet |
fceaf24a HJ |
99 | ); |
100 | ||
101 | static void | |
102 | NetVscOnReceive( | |
3d3b5518 | 103 | struct hv_device *Device, |
fceaf24a HJ |
104 | VMPACKET_DESCRIPTOR *Packet |
105 | ); | |
106 | ||
107 | static void | |
108 | NetVscOnReceiveCompletion( | |
8282c400 | 109 | void * Context |
fceaf24a HJ |
110 | ); |
111 | ||
112 | static void | |
113 | NetVscSendReceiveCompletion( | |
3d3b5518 | 114 | struct hv_device *Device, |
59471438 | 115 | u64 TransactionId |
fceaf24a HJ |
116 | ); |
117 | ||
3d3b5518 | 118 | static inline struct NETVSC_DEVICE *AllocNetDevice(struct hv_device *Device) |
fceaf24a | 119 | { |
d1af1db7 | 120 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 121 | |
d1af1db7 | 122 | netDevice = kzalloc(sizeof(struct NETVSC_DEVICE), GFP_KERNEL); |
fceaf24a HJ |
123 | if (!netDevice) |
124 | return NULL; | |
125 | ||
454f18a9 | 126 | /* Set to 2 to allow both inbound and outbound traffic */ |
f4888417 | 127 | atomic_cmpxchg(&netDevice->RefCount, 0, 2); |
fceaf24a HJ |
128 | |
129 | netDevice->Device = Device; | |
130 | Device->Extension = netDevice; | |
131 | ||
132 | return netDevice; | |
133 | } | |
134 | ||
d1af1db7 | 135 | static inline void FreeNetDevice(struct NETVSC_DEVICE *Device) |
fceaf24a | 136 | { |
f4888417 | 137 | ASSERT(atomic_read(&Device->RefCount) == 0); |
fceaf24a | 138 | Device->Device->Extension = NULL; |
8c69f52a | 139 | kfree(Device); |
fceaf24a HJ |
140 | } |
141 | ||
142 | ||
454f18a9 | 143 | /* Get the net device object iff exists and its refcount > 1 */ |
3d3b5518 | 144 | static inline struct NETVSC_DEVICE *GetOutboundNetDevice(struct hv_device *Device) |
fceaf24a | 145 | { |
d1af1db7 | 146 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 147 | |
d1af1db7 | 148 | netDevice = (struct NETVSC_DEVICE*)Device->Extension; |
f4888417 BP |
149 | if (netDevice && atomic_read(&netDevice->RefCount) > 1) |
150 | atomic_inc(&netDevice->RefCount); | |
fceaf24a | 151 | else |
fceaf24a | 152 | netDevice = NULL; |
fceaf24a HJ |
153 | |
154 | return netDevice; | |
155 | } | |
156 | ||
454f18a9 | 157 | /* Get the net device object iff exists and its refcount > 0 */ |
3d3b5518 | 158 | static inline struct NETVSC_DEVICE *GetInboundNetDevice(struct hv_device *Device) |
fceaf24a | 159 | { |
d1af1db7 | 160 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 161 | |
d1af1db7 | 162 | netDevice = (struct NETVSC_DEVICE*)Device->Extension; |
f4888417 BP |
163 | if (netDevice && atomic_read(&netDevice->RefCount)) |
164 | atomic_inc(&netDevice->RefCount); | |
fceaf24a | 165 | else |
fceaf24a | 166 | netDevice = NULL; |
fceaf24a HJ |
167 | |
168 | return netDevice; | |
169 | } | |
170 | ||
3d3b5518 | 171 | static inline void PutNetDevice(struct hv_device *Device) |
fceaf24a | 172 | { |
d1af1db7 | 173 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 174 | |
d1af1db7 | 175 | netDevice = (struct NETVSC_DEVICE*)Device->Extension; |
fceaf24a HJ |
176 | ASSERT(netDevice); |
177 | ||
f4888417 | 178 | atomic_dec(&netDevice->RefCount); |
fceaf24a HJ |
179 | } |
180 | ||
3d3b5518 | 181 | static inline struct NETVSC_DEVICE *ReleaseOutboundNetDevice(struct hv_device *Device) |
fceaf24a | 182 | { |
d1af1db7 | 183 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 184 | |
d1af1db7 | 185 | netDevice = (struct NETVSC_DEVICE*)Device->Extension; |
fceaf24a HJ |
186 | if (netDevice == NULL) |
187 | return NULL; | |
188 | ||
454f18a9 | 189 | /* Busy wait until the ref drop to 2, then set it to 1 */ |
f4888417 | 190 | while (atomic_cmpxchg(&netDevice->RefCount, 2, 1) != 2) |
fceaf24a | 191 | { |
b4362c9c | 192 | udelay(100); |
fceaf24a HJ |
193 | } |
194 | ||
195 | return netDevice; | |
196 | } | |
197 | ||
3d3b5518 | 198 | static inline struct NETVSC_DEVICE *ReleaseInboundNetDevice(struct hv_device *Device) |
fceaf24a | 199 | { |
d1af1db7 | 200 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 201 | |
d1af1db7 | 202 | netDevice = (struct NETVSC_DEVICE*)Device->Extension; |
fceaf24a HJ |
203 | if (netDevice == NULL) |
204 | return NULL; | |
205 | ||
454f18a9 | 206 | /* Busy wait until the ref drop to 1, then set it to 0 */ |
f4888417 | 207 | while (atomic_cmpxchg(&netDevice->RefCount, 1, 0) != 1) |
fceaf24a | 208 | { |
b4362c9c | 209 | udelay(100); |
fceaf24a HJ |
210 | } |
211 | ||
212 | Device->Extension = NULL; | |
213 | return netDevice; | |
214 | } | |
215 | ||
216 | /*++; | |
217 | ||
218 | ||
219 | Name: | |
220 | NetVscInitialize() | |
221 | ||
222 | Description: | |
223 | Main entry point | |
224 | ||
225 | --*/ | |
226 | int | |
227 | NetVscInitialize( | |
775ef25e | 228 | struct hv_driver *drv |
fceaf24a HJ |
229 | ) |
230 | { | |
231 | NETVSC_DRIVER_OBJECT* driver = (NETVSC_DRIVER_OBJECT*)drv; | |
232 | int ret=0; | |
233 | ||
234 | DPRINT_ENTER(NETVSC); | |
235 | ||
4193d4f4 NP |
236 | DPRINT_DBG(NETVSC, "sizeof(struct hv_netvsc_packet)=%zd, sizeof(NVSP_MESSAGE)=%zd, sizeof(VMTRANSFER_PAGE_PACKET_HEADER)=%zd", |
237 | sizeof(struct hv_netvsc_packet), sizeof(NVSP_MESSAGE), sizeof(VMTRANSFER_PAGE_PACKET_HEADER)); | |
fceaf24a | 238 | |
454f18a9 | 239 | /* Make sure we are at least 2 pages since 1 page is used for control */ |
fceaf24a HJ |
240 | ASSERT(driver->RingBufferSize >= (PAGE_SIZE << 1)); |
241 | ||
242 | drv->name = gDriverName; | |
243 | memcpy(&drv->deviceType, &gNetVscDeviceType, sizeof(GUID)); | |
244 | ||
454f18a9 | 245 | /* Make sure it is set by the caller */ |
fceaf24a HJ |
246 | ASSERT(driver->OnReceiveCallback); |
247 | ASSERT(driver->OnLinkStatusChanged); | |
248 | ||
454f18a9 | 249 | /* Setup the dispatch table */ |
fceaf24a HJ |
250 | driver->Base.OnDeviceAdd = NetVscOnDeviceAdd; |
251 | driver->Base.OnDeviceRemove = NetVscOnDeviceRemove; | |
252 | driver->Base.OnCleanup = NetVscOnCleanup; | |
253 | ||
254 | driver->OnSend = NetVscOnSend; | |
255 | ||
256 | RndisFilterInit(driver); | |
257 | ||
258 | DPRINT_EXIT(NETVSC); | |
259 | ||
260 | return ret; | |
261 | } | |
262 | ||
263 | static int | |
264 | NetVscInitializeReceiveBufferWithNetVsp( | |
3d3b5518 | 265 | struct hv_device *Device |
fceaf24a HJ |
266 | ) |
267 | { | |
268 | int ret=0; | |
d1af1db7 | 269 | struct NETVSC_DEVICE *netDevice; |
fceaf24a HJ |
270 | NVSP_MESSAGE *initPacket; |
271 | ||
272 | DPRINT_ENTER(NETVSC); | |
273 | ||
274 | netDevice = GetOutboundNetDevice(Device); | |
275 | if (!netDevice) | |
276 | { | |
277 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
278 | DPRINT_EXIT(NETVSC); | |
279 | return -1; | |
280 | } | |
281 | ASSERT(netDevice->ReceiveBufferSize > 0); | |
454f18a9 | 282 | ASSERT((netDevice->ReceiveBufferSize & (PAGE_SIZE-1)) == 0); /* page-size grandularity */ |
fceaf24a | 283 | |
bfc30aae | 284 | netDevice->ReceiveBuffer = osd_PageAlloc(netDevice->ReceiveBufferSize >> PAGE_SHIFT); |
fceaf24a HJ |
285 | if (!netDevice->ReceiveBuffer) |
286 | { | |
287 | DPRINT_ERR(NETVSC, "unable to allocate receive buffer of size %d", netDevice->ReceiveBufferSize); | |
288 | ret = -1; | |
289 | goto Cleanup; | |
290 | } | |
454f18a9 | 291 | ASSERT(((unsigned long)netDevice->ReceiveBuffer & (PAGE_SIZE-1)) == 0); /* page-aligned buffer */ |
fceaf24a HJ |
292 | |
293 | DPRINT_INFO(NETVSC, "Establishing receive buffer's GPADL..."); | |
294 | ||
454f18a9 BP |
295 | /* |
296 | * Establish the gpadl handle for this buffer on this | |
297 | * channel. Note: This call uses the vmbus connection rather | |
298 | * than the channel to establish the gpadl handle. | |
299 | */ | |
fceaf24a HJ |
300 | ret = Device->Driver->VmbusChannelInterface.EstablishGpadl(Device, |
301 | netDevice->ReceiveBuffer, | |
302 | netDevice->ReceiveBufferSize, | |
303 | &netDevice->ReceiveBufferGpadlHandle); | |
304 | ||
305 | if (ret != 0) | |
306 | { | |
307 | DPRINT_ERR(NETVSC, "unable to establish receive buffer's gpadl"); | |
308 | goto Cleanup; | |
309 | } | |
310 | ||
bfc30aae | 311 | /* osd_WaitEventWait(ext->ChannelInitEvent); */ |
fceaf24a | 312 | |
454f18a9 | 313 | /* Notify the NetVsp of the gpadl handle */ |
fceaf24a HJ |
314 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendReceiveBuffer..."); |
315 | ||
316 | initPacket = &netDevice->ChannelInitPacket; | |
317 | ||
318 | memset(initPacket, 0, sizeof(NVSP_MESSAGE)); | |
319 | ||
320 | initPacket->Header.MessageType = NvspMessage1TypeSendReceiveBuffer; | |
321 | initPacket->Messages.Version1Messages.SendReceiveBuffer.GpadlHandle = netDevice->ReceiveBufferGpadlHandle; | |
322 | initPacket->Messages.Version1Messages.SendReceiveBuffer.Id = NETVSC_RECEIVE_BUFFER_ID; | |
323 | ||
454f18a9 | 324 | /* Send the gpadl notification request */ |
fceaf24a HJ |
325 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
326 | initPacket, | |
327 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 328 | (unsigned long)initPacket, |
fceaf24a HJ |
329 | VmbusPacketTypeDataInBand, |
330 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
331 | if (ret != 0) | |
332 | { | |
333 | DPRINT_ERR(NETVSC, "unable to send receive buffer's gpadl to netvsp"); | |
334 | goto Cleanup; | |
335 | } | |
336 | ||
bfc30aae | 337 | osd_WaitEventWait(netDevice->ChannelInitEvent); |
fceaf24a | 338 | |
454f18a9 | 339 | /* Check the response */ |
fceaf24a HJ |
340 | if (initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Status != NvspStatusSuccess) |
341 | { | |
342 | DPRINT_ERR(NETVSC, | |
343 | "Unable to complete receive buffer initialzation with NetVsp - status %d", | |
344 | initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Status); | |
345 | ret = -1; | |
346 | goto Cleanup; | |
347 | } | |
348 | ||
454f18a9 | 349 | /* Parse the response */ |
fceaf24a HJ |
350 | ASSERT(netDevice->ReceiveSectionCount == 0); |
351 | ASSERT(netDevice->ReceiveSections == NULL); | |
352 | ||
353 | netDevice->ReceiveSectionCount = initPacket->Messages.Version1Messages.SendReceiveBufferComplete.NumSections; | |
354 | ||
e40d37cc | 355 | netDevice->ReceiveSections = kmalloc(netDevice->ReceiveSectionCount * sizeof(NVSP_1_RECEIVE_BUFFER_SECTION), GFP_KERNEL); |
fceaf24a HJ |
356 | if (netDevice->ReceiveSections == NULL) |
357 | { | |
358 | ret = -1; | |
359 | goto Cleanup; | |
360 | } | |
361 | ||
362 | memcpy(netDevice->ReceiveSections, | |
363 | initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Sections, | |
364 | netDevice->ReceiveSectionCount * sizeof(NVSP_1_RECEIVE_BUFFER_SECTION)); | |
365 | ||
366 | DPRINT_INFO(NETVSC, | |
367 | "Receive sections info (count %d, offset %d, endoffset %d, suballoc size %d, num suballocs %d)", | |
368 | netDevice->ReceiveSectionCount, netDevice->ReceiveSections[0].Offset, netDevice->ReceiveSections[0].EndOffset, | |
369 | netDevice->ReceiveSections[0].SubAllocationSize, netDevice->ReceiveSections[0].NumSubAllocations); | |
370 | ||
371 | ||
454f18a9 | 372 | /* For 1st release, there should only be 1 section that represents the entire receive buffer */ |
fceaf24a HJ |
373 | if (netDevice->ReceiveSectionCount != 1 || |
374 | netDevice->ReceiveSections->Offset != 0 ) | |
375 | { | |
376 | ret = -1; | |
377 | goto Cleanup; | |
378 | } | |
379 | ||
380 | goto Exit; | |
381 | ||
382 | Cleanup: | |
383 | NetVscDestroyReceiveBuffer(netDevice); | |
384 | ||
385 | Exit: | |
386 | PutNetDevice(Device); | |
387 | DPRINT_EXIT(NETVSC); | |
388 | return ret; | |
389 | } | |
390 | ||
391 | ||
392 | static int | |
393 | NetVscInitializeSendBufferWithNetVsp( | |
3d3b5518 | 394 | struct hv_device *Device |
fceaf24a HJ |
395 | ) |
396 | { | |
397 | int ret=0; | |
d1af1db7 | 398 | struct NETVSC_DEVICE *netDevice; |
fceaf24a HJ |
399 | NVSP_MESSAGE *initPacket; |
400 | ||
401 | DPRINT_ENTER(NETVSC); | |
402 | ||
403 | netDevice = GetOutboundNetDevice(Device); | |
404 | if (!netDevice) | |
405 | { | |
406 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
407 | DPRINT_EXIT(NETVSC); | |
408 | return -1; | |
409 | } | |
410 | ASSERT(netDevice->SendBufferSize > 0); | |
454f18a9 | 411 | ASSERT((netDevice->SendBufferSize & (PAGE_SIZE-1)) == 0); /* page-size grandularity */ |
fceaf24a | 412 | |
bfc30aae | 413 | netDevice->SendBuffer = osd_PageAlloc(netDevice->SendBufferSize >> PAGE_SHIFT); |
fceaf24a HJ |
414 | if (!netDevice->SendBuffer) |
415 | { | |
416 | DPRINT_ERR(NETVSC, "unable to allocate send buffer of size %d", netDevice->SendBufferSize); | |
417 | ret = -1; | |
418 | goto Cleanup; | |
419 | } | |
454f18a9 | 420 | ASSERT(((unsigned long)netDevice->SendBuffer & (PAGE_SIZE-1)) == 0); /* page-aligned buffer */ |
fceaf24a HJ |
421 | |
422 | DPRINT_INFO(NETVSC, "Establishing send buffer's GPADL..."); | |
423 | ||
454f18a9 BP |
424 | /* |
425 | * Establish the gpadl handle for this buffer on this | |
426 | * channel. Note: This call uses the vmbus connection rather | |
427 | * than the channel to establish the gpadl handle. | |
428 | */ | |
fceaf24a | 429 | ret = Device->Driver->VmbusChannelInterface.EstablishGpadl(Device, |
454f18a9 BP |
430 | netDevice->SendBuffer, |
431 | netDevice->SendBufferSize, | |
432 | &netDevice->SendBufferGpadlHandle); | |
fceaf24a HJ |
433 | |
434 | if (ret != 0) | |
435 | { | |
436 | DPRINT_ERR(NETVSC, "unable to establish send buffer's gpadl"); | |
437 | goto Cleanup; | |
438 | } | |
439 | ||
bfc30aae | 440 | /* osd_WaitEventWait(ext->ChannelInitEvent); */ |
fceaf24a | 441 | |
454f18a9 | 442 | /* Notify the NetVsp of the gpadl handle */ |
fceaf24a HJ |
443 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendSendBuffer..."); |
444 | ||
445 | initPacket = &netDevice->ChannelInitPacket; | |
446 | ||
447 | memset(initPacket, 0, sizeof(NVSP_MESSAGE)); | |
448 | ||
449 | initPacket->Header.MessageType = NvspMessage1TypeSendSendBuffer; | |
450 | initPacket->Messages.Version1Messages.SendReceiveBuffer.GpadlHandle = netDevice->SendBufferGpadlHandle; | |
451 | initPacket->Messages.Version1Messages.SendReceiveBuffer.Id = NETVSC_SEND_BUFFER_ID; | |
452 | ||
454f18a9 | 453 | /* Send the gpadl notification request */ |
fceaf24a HJ |
454 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
455 | initPacket, | |
456 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 457 | (unsigned long)initPacket, |
fceaf24a HJ |
458 | VmbusPacketTypeDataInBand, |
459 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
460 | if (ret != 0) | |
461 | { | |
462 | DPRINT_ERR(NETVSC, "unable to send receive buffer's gpadl to netvsp"); | |
463 | goto Cleanup; | |
464 | } | |
465 | ||
bfc30aae | 466 | osd_WaitEventWait(netDevice->ChannelInitEvent); |
fceaf24a | 467 | |
454f18a9 | 468 | /* Check the response */ |
fceaf24a HJ |
469 | if (initPacket->Messages.Version1Messages.SendSendBufferComplete.Status != NvspStatusSuccess) |
470 | { | |
471 | DPRINT_ERR(NETVSC, | |
472 | "Unable to complete send buffer initialzation with NetVsp - status %d", | |
473 | initPacket->Messages.Version1Messages.SendSendBufferComplete.Status); | |
474 | ret = -1; | |
475 | goto Cleanup; | |
476 | } | |
477 | ||
478 | netDevice->SendSectionSize = initPacket->Messages.Version1Messages.SendSendBufferComplete.SectionSize; | |
479 | ||
480 | goto Exit; | |
481 | ||
482 | Cleanup: | |
483 | NetVscDestroySendBuffer(netDevice); | |
484 | ||
485 | Exit: | |
486 | PutNetDevice(Device); | |
487 | DPRINT_EXIT(NETVSC); | |
488 | return ret; | |
489 | } | |
490 | ||
491 | static int | |
492 | NetVscDestroyReceiveBuffer( | |
d1af1db7 | 493 | struct NETVSC_DEVICE *NetDevice |
fceaf24a HJ |
494 | ) |
495 | { | |
496 | NVSP_MESSAGE *revokePacket; | |
497 | int ret=0; | |
498 | ||
499 | ||
500 | DPRINT_ENTER(NETVSC); | |
501 | ||
454f18a9 BP |
502 | /* |
503 | * If we got a section count, it means we received a | |
504 | * SendReceiveBufferComplete msg (ie sent | |
505 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
506 | * to send a revoke msg here | |
507 | */ | |
fceaf24a HJ |
508 | if (NetDevice->ReceiveSectionCount) |
509 | { | |
510 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeRevokeReceiveBuffer..."); | |
511 | ||
454f18a9 | 512 | /* Send the revoke receive buffer */ |
fceaf24a HJ |
513 | revokePacket = &NetDevice->RevokePacket; |
514 | memset(revokePacket, 0, sizeof(NVSP_MESSAGE)); | |
515 | ||
516 | revokePacket->Header.MessageType = NvspMessage1TypeRevokeReceiveBuffer; | |
517 | revokePacket->Messages.Version1Messages.RevokeReceiveBuffer.Id = NETVSC_RECEIVE_BUFFER_ID; | |
518 | ||
519 | ret = NetDevice->Device->Driver->VmbusChannelInterface.SendPacket(NetDevice->Device, | |
520 | revokePacket, | |
521 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 522 | (unsigned long)revokePacket, |
fceaf24a HJ |
523 | VmbusPacketTypeDataInBand, |
524 | 0); | |
454f18a9 BP |
525 | /* |
526 | * If we failed here, we might as well return and | |
527 | * have a leak rather than continue and a bugchk | |
528 | */ | |
fceaf24a HJ |
529 | if (ret != 0) |
530 | { | |
531 | DPRINT_ERR(NETVSC, "unable to send revoke receive buffer to netvsp"); | |
532 | DPRINT_EXIT(NETVSC); | |
533 | return -1; | |
534 | } | |
535 | } | |
536 | ||
454f18a9 | 537 | /* Teardown the gpadl on the vsp end */ |
fceaf24a HJ |
538 | if (NetDevice->ReceiveBufferGpadlHandle) |
539 | { | |
540 | DPRINT_INFO(NETVSC, "Tearing down receive buffer's GPADL..."); | |
541 | ||
542 | ret = NetDevice->Device->Driver->VmbusChannelInterface.TeardownGpadl(NetDevice->Device, | |
543 | NetDevice->ReceiveBufferGpadlHandle); | |
544 | ||
454f18a9 | 545 | /* If we failed here, we might as well return and have a leak rather than continue and a bugchk */ |
fceaf24a HJ |
546 | if (ret != 0) |
547 | { | |
548 | DPRINT_ERR(NETVSC, "unable to teardown receive buffer's gpadl"); | |
549 | DPRINT_EXIT(NETVSC); | |
550 | return -1; | |
551 | } | |
552 | NetDevice->ReceiveBufferGpadlHandle = 0; | |
553 | } | |
554 | ||
555 | if (NetDevice->ReceiveBuffer) | |
556 | { | |
557 | DPRINT_INFO(NETVSC, "Freeing up receive buffer..."); | |
558 | ||
454f18a9 | 559 | /* Free up the receive buffer */ |
bfc30aae | 560 | osd_PageFree(NetDevice->ReceiveBuffer, NetDevice->ReceiveBufferSize >> PAGE_SHIFT); |
fceaf24a HJ |
561 | NetDevice->ReceiveBuffer = NULL; |
562 | } | |
563 | ||
564 | if (NetDevice->ReceiveSections) | |
565 | { | |
8c69f52a | 566 | kfree(NetDevice->ReceiveSections); |
fceaf24a HJ |
567 | NetDevice->ReceiveSections = NULL; |
568 | NetDevice->ReceiveSectionCount = 0; | |
569 | } | |
570 | ||
571 | DPRINT_EXIT(NETVSC); | |
572 | ||
573 | return ret; | |
574 | } | |
575 | ||
576 | ||
577 | ||
578 | ||
579 | static int | |
580 | NetVscDestroySendBuffer( | |
d1af1db7 | 581 | struct NETVSC_DEVICE *NetDevice |
fceaf24a HJ |
582 | ) |
583 | { | |
584 | NVSP_MESSAGE *revokePacket; | |
585 | int ret=0; | |
586 | ||
587 | ||
588 | DPRINT_ENTER(NETVSC); | |
589 | ||
454f18a9 BP |
590 | /* |
591 | * If we got a section count, it means we received a | |
592 | * SendReceiveBufferComplete msg (ie sent | |
593 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
594 | * to send a revoke msg here | |
595 | */ | |
fceaf24a HJ |
596 | if (NetDevice->SendSectionSize) |
597 | { | |
598 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeRevokeSendBuffer..."); | |
599 | ||
454f18a9 | 600 | /* Send the revoke send buffer */ |
fceaf24a HJ |
601 | revokePacket = &NetDevice->RevokePacket; |
602 | memset(revokePacket, 0, sizeof(NVSP_MESSAGE)); | |
603 | ||
604 | revokePacket->Header.MessageType = NvspMessage1TypeRevokeSendBuffer; | |
605 | revokePacket->Messages.Version1Messages.RevokeSendBuffer.Id = NETVSC_SEND_BUFFER_ID; | |
606 | ||
607 | ret = NetDevice->Device->Driver->VmbusChannelInterface.SendPacket(NetDevice->Device, | |
608 | revokePacket, | |
609 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 610 | (unsigned long)revokePacket, |
fceaf24a HJ |
611 | VmbusPacketTypeDataInBand, |
612 | 0); | |
454f18a9 | 613 | /* If we failed here, we might as well return and have a leak rather than continue and a bugchk */ |
fceaf24a HJ |
614 | if (ret != 0) |
615 | { | |
616 | DPRINT_ERR(NETVSC, "unable to send revoke send buffer to netvsp"); | |
617 | DPRINT_EXIT(NETVSC); | |
618 | return -1; | |
619 | } | |
620 | } | |
621 | ||
454f18a9 | 622 | /* Teardown the gpadl on the vsp end */ |
fceaf24a HJ |
623 | if (NetDevice->SendBufferGpadlHandle) |
624 | { | |
625 | DPRINT_INFO(NETVSC, "Tearing down send buffer's GPADL..."); | |
626 | ||
627 | ret = NetDevice->Device->Driver->VmbusChannelInterface.TeardownGpadl(NetDevice->Device, | |
628 | NetDevice->SendBufferGpadlHandle); | |
629 | ||
454f18a9 | 630 | /* If we failed here, we might as well return and have a leak rather than continue and a bugchk */ |
fceaf24a HJ |
631 | if (ret != 0) |
632 | { | |
633 | DPRINT_ERR(NETVSC, "unable to teardown send buffer's gpadl"); | |
634 | DPRINT_EXIT(NETVSC); | |
635 | return -1; | |
636 | } | |
637 | NetDevice->SendBufferGpadlHandle = 0; | |
638 | } | |
639 | ||
640 | if (NetDevice->SendBuffer) | |
641 | { | |
642 | DPRINT_INFO(NETVSC, "Freeing up send buffer..."); | |
643 | ||
454f18a9 | 644 | /* Free up the receive buffer */ |
bfc30aae | 645 | osd_PageFree(NetDevice->SendBuffer, NetDevice->SendBufferSize >> PAGE_SHIFT); |
fceaf24a HJ |
646 | NetDevice->SendBuffer = NULL; |
647 | } | |
648 | ||
649 | DPRINT_EXIT(NETVSC); | |
650 | ||
651 | return ret; | |
652 | } | |
653 | ||
654 | ||
655 | ||
656 | static int | |
657 | NetVscConnectToVsp( | |
3d3b5518 | 658 | struct hv_device *Device |
fceaf24a HJ |
659 | ) |
660 | { | |
661 | int ret=0; | |
d1af1db7 | 662 | struct NETVSC_DEVICE *netDevice; |
fceaf24a HJ |
663 | NVSP_MESSAGE *initPacket; |
664 | int ndisVersion; | |
665 | ||
666 | DPRINT_ENTER(NETVSC); | |
667 | ||
668 | netDevice = GetOutboundNetDevice(Device); | |
669 | if (!netDevice) | |
670 | { | |
671 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
672 | DPRINT_EXIT(NETVSC); | |
673 | return -1; | |
674 | } | |
675 | ||
676 | initPacket = &netDevice->ChannelInitPacket; | |
677 | ||
678 | memset(initPacket, 0, sizeof(NVSP_MESSAGE)); | |
679 | initPacket->Header.MessageType = NvspMessageTypeInit; | |
680 | initPacket->Messages.InitMessages.Init.MinProtocolVersion = NVSP_MIN_PROTOCOL_VERSION; | |
681 | initPacket->Messages.InitMessages.Init.MaxProtocolVersion = NVSP_MAX_PROTOCOL_VERSION; | |
682 | ||
683 | DPRINT_INFO(NETVSC, "Sending NvspMessageTypeInit..."); | |
684 | ||
454f18a9 | 685 | /* Send the init request */ |
fceaf24a HJ |
686 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
687 | initPacket, | |
688 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 689 | (unsigned long)initPacket, |
fceaf24a HJ |
690 | VmbusPacketTypeDataInBand, |
691 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
692 | ||
693 | if( ret != 0) | |
694 | { | |
695 | DPRINT_ERR(NETVSC, "unable to send NvspMessageTypeInit"); | |
696 | goto Cleanup; | |
697 | } | |
698 | ||
bfc30aae | 699 | osd_WaitEventWait(netDevice->ChannelInitEvent); |
fceaf24a | 700 | |
454f18a9 BP |
701 | /* Now, check the response */ |
702 | /* ASSERT(initPacket->Messages.InitMessages.InitComplete.MaximumMdlChainLength <= MAX_MULTIPAGE_BUFFER_COUNT); */ | |
fceaf24a HJ |
703 | DPRINT_INFO(NETVSC, "NvspMessageTypeInit status(%d) max mdl chain (%d)", |
704 | initPacket->Messages.InitMessages.InitComplete.Status, | |
705 | initPacket->Messages.InitMessages.InitComplete.MaximumMdlChainLength); | |
706 | ||
707 | if (initPacket->Messages.InitMessages.InitComplete.Status != NvspStatusSuccess) | |
708 | { | |
709 | DPRINT_ERR(NETVSC, "unable to initialize with netvsp (status 0x%x)", initPacket->Messages.InitMessages.InitComplete.Status); | |
710 | ret = -1; | |
711 | goto Cleanup; | |
712 | } | |
713 | ||
714 | if (initPacket->Messages.InitMessages.InitComplete.NegotiatedProtocolVersion != NVSP_PROTOCOL_VERSION_1) | |
715 | { | |
716 | DPRINT_ERR(NETVSC, "unable to initialize with netvsp (version expected 1 got %d)", | |
717 | initPacket->Messages.InitMessages.InitComplete.NegotiatedProtocolVersion); | |
718 | ret = -1; | |
719 | goto Cleanup; | |
720 | } | |
721 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendNdisVersion..."); | |
722 | ||
454f18a9 | 723 | /* Send the ndis version */ |
fceaf24a HJ |
724 | memset(initPacket, 0, sizeof(NVSP_MESSAGE)); |
725 | ||
726 | ndisVersion = 0x00050000; | |
727 | ||
728 | initPacket->Header.MessageType = NvspMessage1TypeSendNdisVersion; | |
729 | initPacket->Messages.Version1Messages.SendNdisVersion.NdisMajorVersion = (ndisVersion & 0xFFFF0000) >> 16; | |
730 | initPacket->Messages.Version1Messages.SendNdisVersion.NdisMinorVersion = ndisVersion & 0xFFFF; | |
731 | ||
454f18a9 | 732 | /* Send the init request */ |
fceaf24a HJ |
733 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
734 | initPacket, | |
735 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 736 | (unsigned long)initPacket, |
fceaf24a HJ |
737 | VmbusPacketTypeDataInBand, |
738 | 0); | |
739 | if (ret != 0) | |
740 | { | |
741 | DPRINT_ERR(NETVSC, "unable to send NvspMessage1TypeSendNdisVersion"); | |
742 | ret = -1; | |
743 | goto Cleanup; | |
744 | } | |
454f18a9 BP |
745 | /* |
746 | * BUGBUG - We have to wait for the above msg since the | |
747 | * netvsp uses KMCL which acknowledges packet (completion | |
748 | * packet) since our Vmbus always set the | |
749 | * VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED flag | |
750 | */ | |
bfc30aae | 751 | /* osd_WaitEventWait(NetVscChannel->ChannelInitEvent); */ |
454f18a9 BP |
752 | |
753 | /* Post the big receive buffer to NetVSP */ | |
fceaf24a HJ |
754 | ret = NetVscInitializeReceiveBufferWithNetVsp(Device); |
755 | if (ret == 0) | |
756 | { | |
757 | ret = NetVscInitializeSendBufferWithNetVsp(Device); | |
758 | } | |
759 | ||
760 | Cleanup: | |
761 | PutNetDevice(Device); | |
762 | DPRINT_EXIT(NETVSC); | |
763 | return ret; | |
764 | } | |
765 | ||
766 | static void | |
767 | NetVscDisconnectFromVsp( | |
d1af1db7 | 768 | struct NETVSC_DEVICE *NetDevice |
fceaf24a HJ |
769 | ) |
770 | { | |
771 | DPRINT_ENTER(NETVSC); | |
772 | ||
773 | NetVscDestroyReceiveBuffer(NetDevice); | |
774 | NetVscDestroySendBuffer(NetDevice); | |
775 | ||
776 | DPRINT_EXIT(NETVSC); | |
777 | } | |
778 | ||
779 | ||
780 | /*++ | |
781 | ||
782 | Name: | |
783 | NetVscOnDeviceAdd() | |
784 | ||
785 | Description: | |
786 | Callback when the device belonging to this driver is added | |
787 | ||
788 | --*/ | |
bd1de709 | 789 | static int |
fceaf24a | 790 | NetVscOnDeviceAdd( |
3d3b5518 | 791 | struct hv_device *Device, |
fceaf24a HJ |
792 | void *AdditionalInfo |
793 | ) | |
794 | { | |
795 | int ret=0; | |
796 | int i; | |
797 | ||
d1af1db7 | 798 | struct NETVSC_DEVICE *netDevice; |
4193d4f4 | 799 | struct hv_netvsc_packet *packet; |
fceaf24a HJ |
800 | LIST_ENTRY *entry; |
801 | ||
802 | NETVSC_DRIVER_OBJECT *netDriver = (NETVSC_DRIVER_OBJECT*) Device->Driver;; | |
803 | ||
804 | DPRINT_ENTER(NETVSC); | |
805 | ||
806 | netDevice = AllocNetDevice(Device); | |
807 | if (!netDevice) | |
808 | { | |
809 | ret = -1; | |
810 | goto Cleanup; | |
811 | } | |
812 | ||
813 | DPRINT_DBG(NETVSC, "netvsc channel object allocated - %p", netDevice); | |
814 | ||
454f18a9 | 815 | /* Initialize the NetVSC channel extension */ |
fceaf24a | 816 | netDevice->ReceiveBufferSize = NETVSC_RECEIVE_BUFFER_SIZE; |
6436873a | 817 | spin_lock_init(&netDevice->receive_packet_list_lock); |
fceaf24a HJ |
818 | |
819 | netDevice->SendBufferSize = NETVSC_SEND_BUFFER_SIZE; | |
820 | ||
821 | INITIALIZE_LIST_HEAD(&netDevice->ReceivePacketList); | |
822 | ||
823 | for (i=0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++) | |
824 | { | |
4193d4f4 | 825 | packet = kzalloc(sizeof(struct hv_netvsc_packet) + (NETVSC_RECEIVE_SG_COUNT* sizeof(PAGE_BUFFER)), GFP_KERNEL); |
fceaf24a HJ |
826 | if (!packet) |
827 | { | |
828 | DPRINT_DBG(NETVSC, "unable to allocate netvsc pkts for receive pool (wanted %d got %d)", NETVSC_RECEIVE_PACKETLIST_COUNT, i); | |
829 | break; | |
830 | } | |
831 | ||
832 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->ListEntry); | |
833 | } | |
bfc30aae | 834 | netDevice->ChannelInitEvent = osd_WaitEventCreate(); |
fceaf24a | 835 | |
454f18a9 | 836 | /* Open the channel */ |
fceaf24a | 837 | ret = Device->Driver->VmbusChannelInterface.Open(Device, |
454f18a9 BP |
838 | netDriver->RingBufferSize, |
839 | netDriver->RingBufferSize, | |
840 | NULL, 0, | |
841 | NetVscOnChannelCallback, | |
842 | Device | |
843 | ); | |
fceaf24a HJ |
844 | |
845 | if (ret != 0) | |
846 | { | |
847 | DPRINT_ERR(NETVSC, "unable to open channel: %d", ret); | |
848 | ret = -1; | |
849 | goto Cleanup; | |
850 | } | |
851 | ||
454f18a9 | 852 | /* Channel is opened */ |
fceaf24a HJ |
853 | DPRINT_INFO(NETVSC, "*** NetVSC channel opened successfully! ***"); |
854 | ||
454f18a9 | 855 | /* Connect with the NetVsp */ |
fceaf24a HJ |
856 | ret = NetVscConnectToVsp(Device); |
857 | if (ret != 0) | |
858 | { | |
859 | DPRINT_ERR(NETVSC, "unable to connect to NetVSP - %d", ret); | |
860 | ret = -1; | |
861 | goto Close; | |
862 | } | |
863 | ||
864 | DPRINT_INFO(NETVSC, "*** NetVSC channel handshake result - %d ***", ret); | |
865 | ||
866 | DPRINT_EXIT(NETVSC); | |
867 | return ret; | |
868 | ||
869 | Close: | |
454f18a9 | 870 | /* Now, we can close the channel safely */ |
fceaf24a HJ |
871 | Device->Driver->VmbusChannelInterface.Close(Device); |
872 | ||
873 | Cleanup: | |
874 | ||
875 | if (netDevice) | |
876 | { | |
420beac4 | 877 | kfree(netDevice->ChannelInitEvent); |
fceaf24a HJ |
878 | |
879 | while (!IsListEmpty(&netDevice->ReceivePacketList)) | |
880 | { | |
881 | entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList); | |
4193d4f4 | 882 | packet = CONTAINING_RECORD(entry, struct hv_netvsc_packet, ListEntry); |
8c69f52a | 883 | kfree(packet); |
fceaf24a HJ |
884 | } |
885 | ||
fceaf24a HJ |
886 | ReleaseOutboundNetDevice(Device); |
887 | ReleaseInboundNetDevice(Device); | |
888 | ||
889 | FreeNetDevice(netDevice); | |
890 | } | |
891 | ||
892 | DPRINT_EXIT(NETVSC); | |
893 | return ret; | |
894 | } | |
895 | ||
896 | ||
897 | /*++ | |
898 | ||
899 | Name: | |
900 | NetVscOnDeviceRemove() | |
901 | ||
902 | Description: | |
903 | Callback when the root bus device is removed | |
904 | ||
905 | --*/ | |
bd1de709 | 906 | static int |
fceaf24a | 907 | NetVscOnDeviceRemove( |
3d3b5518 | 908 | struct hv_device *Device |
fceaf24a HJ |
909 | ) |
910 | { | |
d1af1db7 | 911 | struct NETVSC_DEVICE *netDevice; |
4193d4f4 | 912 | struct hv_netvsc_packet *netvscPacket; |
fceaf24a HJ |
913 | int ret=0; |
914 | LIST_ENTRY *entry; | |
915 | ||
916 | DPRINT_ENTER(NETVSC); | |
917 | ||
918 | DPRINT_INFO(NETVSC, "Disabling outbound traffic on net device (%p)...", Device->Extension); | |
919 | ||
454f18a9 | 920 | /* Stop outbound traffic ie sends and receives completions */ |
fceaf24a HJ |
921 | netDevice = ReleaseOutboundNetDevice(Device); |
922 | if (!netDevice) | |
923 | { | |
924 | DPRINT_ERR(NETVSC, "No net device present!!"); | |
925 | return -1; | |
926 | } | |
927 | ||
454f18a9 | 928 | /* Wait for all send completions */ |
f4888417 | 929 | while (atomic_read(&netDevice->NumOutstandingSends)) |
fceaf24a | 930 | { |
f4888417 | 931 | DPRINT_INFO(NETVSC, "waiting for %d requests to complete...", atomic_read(&netDevice->NumOutstandingSends)); |
fceaf24a | 932 | |
b4362c9c | 933 | udelay(100); |
fceaf24a HJ |
934 | } |
935 | ||
936 | DPRINT_INFO(NETVSC, "Disconnecting from netvsp..."); | |
937 | ||
938 | NetVscDisconnectFromVsp(netDevice); | |
939 | ||
940 | DPRINT_INFO(NETVSC, "Disabling inbound traffic on net device (%p)...", Device->Extension); | |
941 | ||
454f18a9 | 942 | /* Stop inbound traffic ie receives and sends completions */ |
fceaf24a HJ |
943 | netDevice = ReleaseInboundNetDevice(Device); |
944 | ||
454f18a9 | 945 | /* At this point, no one should be accessing netDevice except in here */ |
fceaf24a HJ |
946 | DPRINT_INFO(NETVSC, "net device (%p) safe to remove", netDevice); |
947 | ||
454f18a9 | 948 | /* Now, we can close the channel safely */ |
fceaf24a HJ |
949 | Device->Driver->VmbusChannelInterface.Close(Device); |
950 | ||
454f18a9 | 951 | /* Release all resources */ |
fceaf24a HJ |
952 | while (!IsListEmpty(&netDevice->ReceivePacketList)) |
953 | { | |
954 | entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList); | |
4193d4f4 | 955 | netvscPacket = CONTAINING_RECORD(entry, struct hv_netvsc_packet, ListEntry); |
fceaf24a | 956 | |
8c69f52a | 957 | kfree(netvscPacket); |
fceaf24a HJ |
958 | } |
959 | ||
420beac4 | 960 | kfree(netDevice->ChannelInitEvent); |
fceaf24a HJ |
961 | FreeNetDevice(netDevice); |
962 | ||
963 | DPRINT_EXIT(NETVSC); | |
964 | return ret; | |
965 | } | |
966 | ||
967 | ||
968 | ||
969 | /*++ | |
970 | ||
971 | Name: | |
972 | NetVscOnCleanup() | |
973 | ||
974 | Description: | |
975 | Perform any cleanup when the driver is removed | |
976 | ||
977 | --*/ | |
bd1de709 | 978 | static void |
fceaf24a | 979 | NetVscOnCleanup( |
775ef25e | 980 | struct hv_driver *drv |
fceaf24a HJ |
981 | ) |
982 | { | |
983 | DPRINT_ENTER(NETVSC); | |
984 | ||
985 | DPRINT_EXIT(NETVSC); | |
986 | } | |
987 | ||
988 | static void | |
989 | NetVscOnSendCompletion( | |
3d3b5518 | 990 | struct hv_device *Device, |
fceaf24a HJ |
991 | VMPACKET_DESCRIPTOR *Packet |
992 | ) | |
993 | { | |
d1af1db7 | 994 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 995 | NVSP_MESSAGE *nvspPacket; |
4193d4f4 | 996 | struct hv_netvsc_packet *nvscPacket; |
fceaf24a HJ |
997 | |
998 | DPRINT_ENTER(NETVSC); | |
999 | ||
1000 | netDevice = GetInboundNetDevice(Device); | |
1001 | if (!netDevice) | |
1002 | { | |
1003 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
1004 | DPRINT_EXIT(NETVSC); | |
1005 | return; | |
1006 | } | |
1007 | ||
c4b0bc94 | 1008 | nvspPacket = (NVSP_MESSAGE*)((unsigned long)Packet + (Packet->DataOffset8 << 3)); |
fceaf24a HJ |
1009 | |
1010 | DPRINT_DBG(NETVSC, "send completion packet - type %d", nvspPacket->Header.MessageType); | |
1011 | ||
1012 | if (nvspPacket->Header.MessageType == NvspMessageTypeInitComplete || | |
1013 | nvspPacket->Header.MessageType == NvspMessage1TypeSendReceiveBufferComplete || | |
1014 | nvspPacket->Header.MessageType == NvspMessage1TypeSendSendBufferComplete) | |
1015 | { | |
454f18a9 | 1016 | /* Copy the response back */ |
fceaf24a | 1017 | memcpy(&netDevice->ChannelInitPacket, nvspPacket, sizeof(NVSP_MESSAGE)); |
bfc30aae | 1018 | osd_WaitEventSet(netDevice->ChannelInitEvent); |
fceaf24a HJ |
1019 | } |
1020 | else if (nvspPacket->Header.MessageType == NvspMessage1TypeSendRNDISPacketComplete) | |
1021 | { | |
454f18a9 | 1022 | /* Get the send context */ |
4193d4f4 | 1023 | nvscPacket = (struct hv_netvsc_packet *)(unsigned long)Packet->TransactionId; |
fceaf24a HJ |
1024 | ASSERT(nvscPacket); |
1025 | ||
454f18a9 | 1026 | /* Notify the layer above us */ |
fceaf24a HJ |
1027 | nvscPacket->Completion.Send.OnSendCompletion(nvscPacket->Completion.Send.SendCompletionContext); |
1028 | ||
f4888417 | 1029 | atomic_dec(&netDevice->NumOutstandingSends); |
fceaf24a HJ |
1030 | } |
1031 | else | |
1032 | { | |
1033 | DPRINT_ERR(NETVSC, "Unknown send completion packet type - %d received!!", nvspPacket->Header.MessageType); | |
1034 | } | |
1035 | ||
1036 | PutNetDevice(Device); | |
1037 | DPRINT_EXIT(NETVSC); | |
1038 | } | |
1039 | ||
1040 | ||
1041 | ||
1042 | static int | |
1043 | NetVscOnSend( | |
3d3b5518 | 1044 | struct hv_device *Device, |
4193d4f4 | 1045 | struct hv_netvsc_packet *Packet |
fceaf24a HJ |
1046 | ) |
1047 | { | |
d1af1db7 | 1048 | struct NETVSC_DEVICE *netDevice; |
fceaf24a HJ |
1049 | int ret=0; |
1050 | ||
1051 | NVSP_MESSAGE sendMessage; | |
1052 | ||
1053 | DPRINT_ENTER(NETVSC); | |
1054 | ||
1055 | netDevice = GetOutboundNetDevice(Device); | |
1056 | if (!netDevice) | |
1057 | { | |
1058 | DPRINT_ERR(NETVSC, "net device (%p) shutting down...ignoring outbound packets", netDevice); | |
1059 | DPRINT_EXIT(NETVSC); | |
1060 | return -2; | |
1061 | } | |
1062 | ||
1063 | sendMessage.Header.MessageType = NvspMessage1TypeSendRNDISPacket; | |
1064 | if (Packet->IsDataPacket) | |
454f18a9 | 1065 | sendMessage.Messages.Version1Messages.SendRNDISPacket.ChannelType = 0;/* 0 is RMC_DATA; */ |
fceaf24a | 1066 | else |
454f18a9 | 1067 | sendMessage.Messages.Version1Messages.SendRNDISPacket.ChannelType = 1;/* 1 is RMC_CONTROL; */ |
fceaf24a | 1068 | |
454f18a9 | 1069 | /* Not using send buffer section */ |
fceaf24a HJ |
1070 | sendMessage.Messages.Version1Messages.SendRNDISPacket.SendBufferSectionIndex = 0xFFFFFFFF; |
1071 | sendMessage.Messages.Version1Messages.SendRNDISPacket.SendBufferSectionSize = 0; | |
1072 | ||
1073 | if (Packet->PageBufferCount) | |
1074 | { | |
1075 | ret = Device->Driver->VmbusChannelInterface.SendPacketPageBuffer(Device, | |
1076 | Packet->PageBuffers, | |
1077 | Packet->PageBufferCount, | |
1078 | &sendMessage, | |
1079 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 1080 | (unsigned long)Packet); |
fceaf24a HJ |
1081 | } |
1082 | else | |
1083 | { | |
1084 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
1085 | &sendMessage, | |
1086 | sizeof(NVSP_MESSAGE), | |
c4b0bc94 | 1087 | (unsigned long)Packet, |
fceaf24a HJ |
1088 | VmbusPacketTypeDataInBand, |
1089 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
1090 | ||
1091 | } | |
1092 | ||
1093 | if (ret != 0) | |
1094 | { | |
1095 | DPRINT_ERR(NETVSC, "Unable to send packet %p ret %d", Packet, ret); | |
1096 | } | |
1097 | ||
f4888417 | 1098 | atomic_inc(&netDevice->NumOutstandingSends); |
fceaf24a HJ |
1099 | PutNetDevice(Device); |
1100 | ||
1101 | DPRINT_EXIT(NETVSC); | |
1102 | return ret; | |
1103 | } | |
1104 | ||
1105 | ||
1106 | static void | |
1107 | NetVscOnReceive( | |
3d3b5518 | 1108 | struct hv_device *Device, |
fceaf24a HJ |
1109 | VMPACKET_DESCRIPTOR *Packet |
1110 | ) | |
1111 | { | |
d1af1db7 | 1112 | struct NETVSC_DEVICE *netDevice; |
fceaf24a HJ |
1113 | VMTRANSFER_PAGE_PACKET_HEADER *vmxferpagePacket; |
1114 | NVSP_MESSAGE *nvspPacket; | |
4193d4f4 | 1115 | struct hv_netvsc_packet *netvscPacket=NULL; |
fceaf24a | 1116 | LIST_ENTRY* entry; |
c4b0bc94 GKH |
1117 | unsigned long start; |
1118 | unsigned long end, endVirtual; | |
454f18a9 | 1119 | /* NETVSC_DRIVER_OBJECT *netvscDriver; */ |
fceaf24a HJ |
1120 | XFERPAGE_PACKET *xferpagePacket=NULL; |
1121 | LIST_ENTRY listHead; | |
1122 | ||
1123 | int i=0, j=0; | |
1124 | int count=0, bytesRemain=0; | |
6436873a | 1125 | unsigned long flags; |
fceaf24a HJ |
1126 | |
1127 | DPRINT_ENTER(NETVSC); | |
1128 | ||
1129 | netDevice = GetInboundNetDevice(Device); | |
1130 | if (!netDevice) | |
1131 | { | |
1132 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
1133 | DPRINT_EXIT(NETVSC); | |
1134 | return; | |
1135 | } | |
1136 | ||
454f18a9 | 1137 | /* All inbound packets other than send completion should be xfer page packet */ |
fceaf24a HJ |
1138 | if (Packet->Type != VmbusPacketTypeDataUsingTransferPages) |
1139 | { | |
1140 | DPRINT_ERR(NETVSC, "Unknown packet type received - %d", Packet->Type); | |
1141 | PutNetDevice(Device); | |
1142 | return; | |
1143 | } | |
1144 | ||
c4b0bc94 | 1145 | nvspPacket = (NVSP_MESSAGE*)((unsigned long)Packet + (Packet->DataOffset8 << 3)); |
fceaf24a | 1146 | |
454f18a9 | 1147 | /* Make sure this is a valid nvsp packet */ |
fceaf24a HJ |
1148 | if (nvspPacket->Header.MessageType != NvspMessage1TypeSendRNDISPacket ) |
1149 | { | |
1150 | DPRINT_ERR(NETVSC, "Unknown nvsp packet type received - %d", nvspPacket->Header.MessageType); | |
1151 | PutNetDevice(Device); | |
1152 | return; | |
1153 | } | |
1154 | ||
1155 | DPRINT_DBG(NETVSC, "NVSP packet received - type %d", nvspPacket->Header.MessageType); | |
1156 | ||
1157 | vmxferpagePacket = (VMTRANSFER_PAGE_PACKET_HEADER*)Packet; | |
1158 | ||
1159 | if (vmxferpagePacket->TransferPageSetId != NETVSC_RECEIVE_BUFFER_ID) | |
1160 | { | |
1161 | DPRINT_ERR(NETVSC, "Invalid xfer page set id - expecting %x got %x", NETVSC_RECEIVE_BUFFER_ID, vmxferpagePacket->TransferPageSetId); | |
1162 | PutNetDevice(Device); | |
1163 | return; | |
1164 | } | |
1165 | ||
1166 | DPRINT_DBG(NETVSC, "xfer page - range count %d", vmxferpagePacket->RangeCount); | |
1167 | ||
1168 | INITIALIZE_LIST_HEAD(&listHead); | |
1169 | ||
454f18a9 BP |
1170 | /* |
1171 | * Grab free packets (range count + 1) to represent this xfer | |
1172 | * page packet. +1 to represent the xfer page packet itself. | |
1173 | * We grab it here so that we know exactly how many we can | |
1174 | * fulfil | |
1175 | */ | |
6436873a | 1176 | spin_lock_irqsave(&netDevice->receive_packet_list_lock, flags); |
fceaf24a HJ |
1177 | while (!IsListEmpty(&netDevice->ReceivePacketList)) |
1178 | { | |
1179 | entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList); | |
4193d4f4 | 1180 | netvscPacket = CONTAINING_RECORD(entry, struct hv_netvsc_packet, ListEntry); |
fceaf24a HJ |
1181 | |
1182 | INSERT_TAIL_LIST(&listHead, &netvscPacket->ListEntry); | |
1183 | ||
1184 | if (++count == vmxferpagePacket->RangeCount + 1) | |
1185 | break; | |
1186 | } | |
6436873a | 1187 | spin_unlock_irqrestore(&netDevice->receive_packet_list_lock, flags); |
fceaf24a | 1188 | |
454f18a9 BP |
1189 | /* |
1190 | * We need at least 2 netvsc pkts (1 to represent the xfer | |
1191 | * page and at least 1 for the range) i.e. we can handled | |
1192 | * some of the xfer page packet ranges... | |
1193 | */ | |
fceaf24a HJ |
1194 | if (count < 2) |
1195 | { | |
1196 | DPRINT_ERR(NETVSC, "Got only %d netvsc pkt...needed %d pkts. Dropping this xfer page packet completely!", count, vmxferpagePacket->RangeCount+1); | |
1197 | ||
454f18a9 | 1198 | /* Return it to the freelist */ |
6436873a | 1199 | spin_lock_irqsave(&netDevice->receive_packet_list_lock, flags); |
fceaf24a HJ |
1200 | for (i=count; i != 0; i--) |
1201 | { | |
1202 | entry = REMOVE_HEAD_LIST(&listHead); | |
4193d4f4 | 1203 | netvscPacket = CONTAINING_RECORD(entry, struct hv_netvsc_packet, ListEntry); |
fceaf24a HJ |
1204 | |
1205 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &netvscPacket->ListEntry); | |
1206 | } | |
6436873a | 1207 | spin_unlock_irqrestore(&netDevice->receive_packet_list_lock, flags); |
fceaf24a HJ |
1208 | |
1209 | NetVscSendReceiveCompletion(Device, vmxferpagePacket->d.TransactionId); | |
1210 | ||
1211 | PutNetDevice(Device); | |
1212 | return; | |
1213 | } | |
1214 | ||
454f18a9 | 1215 | /* Remove the 1st packet to represent the xfer page packet itself */ |
fceaf24a HJ |
1216 | entry = REMOVE_HEAD_LIST(&listHead); |
1217 | xferpagePacket = CONTAINING_RECORD(entry, XFERPAGE_PACKET, ListEntry); | |
454f18a9 | 1218 | xferpagePacket->Count = count - 1; /* This is how much we can satisfy */ |
fceaf24a HJ |
1219 | ASSERT(xferpagePacket->Count > 0 && xferpagePacket->Count <= vmxferpagePacket->RangeCount); |
1220 | ||
1221 | if (xferpagePacket->Count != vmxferpagePacket->RangeCount) | |
1222 | { | |
1223 | DPRINT_INFO(NETVSC, "Needed %d netvsc pkts to satisy this xfer page...got %d", vmxferpagePacket->RangeCount, xferpagePacket->Count); | |
1224 | } | |
1225 | ||
454f18a9 | 1226 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
fceaf24a HJ |
1227 | for (i=0; i < (count - 1); i++) |
1228 | { | |
1229 | entry = REMOVE_HEAD_LIST(&listHead); | |
4193d4f4 | 1230 | netvscPacket = CONTAINING_RECORD(entry, struct hv_netvsc_packet, ListEntry); |
fceaf24a | 1231 | |
454f18a9 | 1232 | /* Initialize the netvsc packet */ |
fceaf24a HJ |
1233 | netvscPacket->XferPagePacket = xferpagePacket; |
1234 | netvscPacket->Completion.Recv.OnReceiveCompletion = NetVscOnReceiveCompletion; | |
1235 | netvscPacket->Completion.Recv.ReceiveCompletionContext = netvscPacket; | |
1236 | netvscPacket->Device = Device; | |
454f18a9 | 1237 | netvscPacket->Completion.Recv.ReceiveCompletionTid = vmxferpagePacket->d.TransactionId; /* Save this so that we can send it back */ |
fceaf24a HJ |
1238 | |
1239 | netvscPacket->TotalDataBufferLength = vmxferpagePacket->Ranges[i].ByteCount; | |
1240 | netvscPacket->PageBufferCount = 1; | |
1241 | ||
1242 | ASSERT(vmxferpagePacket->Ranges[i].ByteOffset + vmxferpagePacket->Ranges[i].ByteCount < netDevice->ReceiveBufferSize); | |
1243 | ||
1244 | netvscPacket->PageBuffers[0].Length = vmxferpagePacket->Ranges[i].ByteCount; | |
1245 | ||
fa56d361 | 1246 | start = virt_to_phys((void*)((unsigned long)netDevice->ReceiveBuffer + vmxferpagePacket->Ranges[i].ByteOffset)); |
fceaf24a HJ |
1247 | |
1248 | netvscPacket->PageBuffers[0].Pfn = start >> PAGE_SHIFT; | |
c4b0bc94 | 1249 | endVirtual = (unsigned long)netDevice->ReceiveBuffer |
fceaf24a HJ |
1250 | + vmxferpagePacket->Ranges[i].ByteOffset |
1251 | + vmxferpagePacket->Ranges[i].ByteCount -1; | |
fa56d361 | 1252 | end = virt_to_phys((void*)endVirtual); |
fceaf24a | 1253 | |
454f18a9 | 1254 | /* Calculate the page relative offset */ |
fceaf24a HJ |
1255 | netvscPacket->PageBuffers[0].Offset = vmxferpagePacket->Ranges[i].ByteOffset & (PAGE_SIZE -1); |
1256 | if ((end >> PAGE_SHIFT) != (start>>PAGE_SHIFT)) { | |
454f18a9 | 1257 | /* Handle frame across multiple pages: */ |
fceaf24a HJ |
1258 | netvscPacket->PageBuffers[0].Length = |
1259 | (netvscPacket->PageBuffers[0].Pfn <<PAGE_SHIFT) + PAGE_SIZE - start; | |
1260 | bytesRemain = netvscPacket->TotalDataBufferLength - netvscPacket->PageBuffers[0].Length; | |
1261 | for (j=1; j<NETVSC_PACKET_MAXPAGE; j++) { | |
1262 | netvscPacket->PageBuffers[j].Offset = 0; | |
1263 | if (bytesRemain <= PAGE_SIZE) { | |
1264 | netvscPacket->PageBuffers[j].Length = bytesRemain; | |
1265 | bytesRemain = 0; | |
1266 | } else { | |
1267 | netvscPacket->PageBuffers[j].Length = PAGE_SIZE; | |
1268 | bytesRemain -= PAGE_SIZE; | |
1269 | } | |
1270 | netvscPacket->PageBuffers[j].Pfn = | |
fa56d361 | 1271 | virt_to_phys((void*)(endVirtual - bytesRemain)) >> PAGE_SHIFT; |
fceaf24a HJ |
1272 | netvscPacket->PageBufferCount++; |
1273 | if (bytesRemain == 0) | |
1274 | break; | |
1275 | } | |
1276 | ASSERT(bytesRemain == 0); | |
1277 | } | |
1278 | DPRINT_DBG(NETVSC, "[%d] - (abs offset %u len %u) => (pfn %llx, offset %u, len %u)", | |
1279 | i, | |
1280 | vmxferpagePacket->Ranges[i].ByteOffset, | |
1281 | vmxferpagePacket->Ranges[i].ByteCount, | |
1282 | netvscPacket->PageBuffers[0].Pfn, | |
1283 | netvscPacket->PageBuffers[0].Offset, | |
1284 | netvscPacket->PageBuffers[0].Length); | |
1285 | ||
454f18a9 | 1286 | /* Pass it to the upper layer */ |
fceaf24a HJ |
1287 | ((NETVSC_DRIVER_OBJECT*)Device->Driver)->OnReceiveCallback(Device, netvscPacket); |
1288 | ||
1289 | NetVscOnReceiveCompletion(netvscPacket->Completion.Recv.ReceiveCompletionContext); | |
1290 | } | |
1291 | ||
1292 | ASSERT(IsListEmpty(&listHead)); | |
1293 | ||
1294 | PutNetDevice(Device); | |
1295 | DPRINT_EXIT(NETVSC); | |
1296 | } | |
1297 | ||
1298 | ||
1299 | static void | |
1300 | NetVscSendReceiveCompletion( | |
3d3b5518 | 1301 | struct hv_device *Device, |
59471438 | 1302 | u64 TransactionId |
fceaf24a HJ |
1303 | ) |
1304 | { | |
1305 | NVSP_MESSAGE recvcompMessage; | |
1306 | int retries=0; | |
1307 | int ret=0; | |
1308 | ||
1309 | DPRINT_DBG(NETVSC, "Sending receive completion pkt - %llx", TransactionId); | |
1310 | ||
1311 | recvcompMessage.Header.MessageType = NvspMessage1TypeSendRNDISPacketComplete; | |
1312 | ||
454f18a9 | 1313 | /* FIXME: Pass in the status */ |
fceaf24a HJ |
1314 | recvcompMessage.Messages.Version1Messages.SendRNDISPacketComplete.Status = NvspStatusSuccess; |
1315 | ||
1316 | retry_send_cmplt: | |
454f18a9 | 1317 | /* Send the completion */ |
fceaf24a HJ |
1318 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
1319 | &recvcompMessage, | |
1320 | sizeof(NVSP_MESSAGE), | |
1321 | TransactionId, | |
1322 | VmbusPacketTypeCompletion, | |
1323 | 0); | |
454f18a9 | 1324 | if (ret == 0) /* success */ |
fceaf24a | 1325 | { |
454f18a9 | 1326 | /* no-op */ |
fceaf24a | 1327 | } |
454f18a9 | 1328 | else if (ret == -1) /* no more room...wait a bit and attempt to retry 3 times */ |
fceaf24a HJ |
1329 | { |
1330 | retries++; | |
1331 | DPRINT_ERR(NETVSC, "unable to send receive completion pkt (tid %llx)...retrying %d", TransactionId, retries); | |
1332 | ||
1333 | if (retries < 4) | |
1334 | { | |
b4362c9c | 1335 | udelay(100); |
fceaf24a HJ |
1336 | goto retry_send_cmplt; |
1337 | } | |
1338 | else | |
1339 | { | |
1340 | DPRINT_ERR(NETVSC, "unable to send receive completion pkt (tid %llx)...give up retrying", TransactionId); | |
1341 | } | |
1342 | } | |
1343 | else | |
1344 | { | |
1345 | DPRINT_ERR(NETVSC, "unable to send receive completion pkt - %llx", TransactionId); | |
1346 | } | |
1347 | } | |
1348 | ||
454f18a9 | 1349 | /* Send a receive completion packet to RNDIS device (ie NetVsp) */ |
fceaf24a HJ |
1350 | static void |
1351 | NetVscOnReceiveCompletion( | |
8282c400 | 1352 | void * Context) |
fceaf24a | 1353 | { |
4193d4f4 | 1354 | struct hv_netvsc_packet *packet = (struct hv_netvsc_packet*)Context; |
3d3b5518 | 1355 | struct hv_device *device = (struct hv_device*)packet->Device; |
d1af1db7 | 1356 | struct NETVSC_DEVICE *netDevice; |
59471438 | 1357 | u64 transactionId=0; |
0e727613 | 1358 | bool fSendReceiveComp = false; |
6436873a | 1359 | unsigned long flags; |
fceaf24a HJ |
1360 | |
1361 | DPRINT_ENTER(NETVSC); | |
1362 | ||
1363 | ASSERT(packet->XferPagePacket); | |
1364 | ||
454f18a9 BP |
1365 | /* Even though it seems logical to do a GetOutboundNetDevice() here to send out receive completion, */ |
1366 | /* we are using GetInboundNetDevice() since we may have disable outbound traffic already. */ | |
fceaf24a HJ |
1367 | netDevice = GetInboundNetDevice(device); |
1368 | if (!netDevice) | |
1369 | { | |
1370 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
1371 | DPRINT_EXIT(NETVSC); | |
1372 | return; | |
1373 | } | |
1374 | ||
454f18a9 | 1375 | /* Overloading use of the lock. */ |
6436873a | 1376 | spin_lock_irqsave(&netDevice->receive_packet_list_lock, flags); |
fceaf24a HJ |
1377 | |
1378 | ASSERT(packet->XferPagePacket->Count > 0); | |
1379 | packet->XferPagePacket->Count--; | |
1380 | ||
454f18a9 BP |
1381 | /* Last one in the line that represent 1 xfer page packet. */ |
1382 | /* Return the xfer page packet itself to the freelist */ | |
fceaf24a HJ |
1383 | if (packet->XferPagePacket->Count == 0) |
1384 | { | |
0e727613 | 1385 | fSendReceiveComp = true; |
fceaf24a HJ |
1386 | transactionId = packet->Completion.Recv.ReceiveCompletionTid; |
1387 | ||
1388 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->XferPagePacket->ListEntry); | |
1389 | } | |
1390 | ||
454f18a9 | 1391 | /* Put the packet back */ |
fceaf24a | 1392 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->ListEntry); |
6436873a | 1393 | spin_unlock_irqrestore(&netDevice->receive_packet_list_lock, flags); |
fceaf24a | 1394 | |
454f18a9 | 1395 | /* Send a receive completion for the xfer page packet */ |
fceaf24a HJ |
1396 | if (fSendReceiveComp) |
1397 | { | |
1398 | NetVscSendReceiveCompletion(device, transactionId); | |
1399 | } | |
1400 | ||
1401 | PutNetDevice(device); | |
1402 | DPRINT_EXIT(NETVSC); | |
1403 | } | |
1404 | ||
1405 | ||
1406 | ||
1407 | void | |
1408 | NetVscOnChannelCallback( | |
8282c400 | 1409 | void * Context |
fceaf24a HJ |
1410 | ) |
1411 | { | |
1412 | const int netPacketSize=2048; | |
1413 | int ret=0; | |
3d3b5518 | 1414 | struct hv_device *device=(struct hv_device*)Context; |
d1af1db7 | 1415 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 1416 | |
4d643114 | 1417 | u32 bytesRecvd; |
59471438 GKH |
1418 | u64 requestId; |
1419 | unsigned char packet[netPacketSize]; | |
fceaf24a | 1420 | VMPACKET_DESCRIPTOR *desc; |
59471438 | 1421 | unsigned char *buffer=packet; |
fceaf24a HJ |
1422 | int bufferlen=netPacketSize; |
1423 | ||
1424 | ||
1425 | DPRINT_ENTER(NETVSC); | |
1426 | ||
1427 | ASSERT(device); | |
1428 | ||
1429 | netDevice = GetInboundNetDevice(device); | |
1430 | if (!netDevice) | |
1431 | { | |
1432 | DPRINT_ERR(NETVSC, "net device (%p) shutting down...ignoring inbound packets", netDevice); | |
1433 | DPRINT_EXIT(NETVSC); | |
1434 | return; | |
1435 | } | |
1436 | ||
1437 | do | |
1438 | { | |
1439 | ret = device->Driver->VmbusChannelInterface.RecvPacketRaw(device, | |
1440 | buffer, | |
1441 | bufferlen, | |
1442 | &bytesRecvd, | |
1443 | &requestId); | |
1444 | ||
1445 | if (ret == 0) | |
1446 | { | |
1447 | if (bytesRecvd > 0) | |
1448 | { | |
1449 | DPRINT_DBG(NETVSC, "receive %d bytes, tid %llx", bytesRecvd, requestId); | |
1450 | ||
1451 | desc = (VMPACKET_DESCRIPTOR*)buffer; | |
1452 | switch (desc->Type) | |
1453 | { | |
1454 | case VmbusPacketTypeCompletion: | |
1455 | NetVscOnSendCompletion(device, desc); | |
1456 | break; | |
1457 | ||
1458 | case VmbusPacketTypeDataUsingTransferPages: | |
1459 | NetVscOnReceive(device, desc); | |
1460 | break; | |
1461 | ||
1462 | default: | |
1463 | DPRINT_ERR(NETVSC, "unhandled packet type %d, tid %llx len %d\n", desc->Type, requestId, bytesRecvd); | |
1464 | break; | |
1465 | } | |
1466 | ||
454f18a9 | 1467 | /* reset */ |
fceaf24a HJ |
1468 | if (bufferlen > netPacketSize) |
1469 | { | |
8c69f52a | 1470 | kfree(buffer); |
fceaf24a HJ |
1471 | |
1472 | buffer = packet; | |
1473 | bufferlen = netPacketSize; | |
1474 | } | |
1475 | } | |
1476 | else | |
1477 | { | |
454f18a9 | 1478 | /* DPRINT_DBG(NETVSC, "nothing else to read..."); */ |
fceaf24a | 1479 | |
454f18a9 | 1480 | /* reset */ |
fceaf24a HJ |
1481 | if (bufferlen > netPacketSize) |
1482 | { | |
8c69f52a | 1483 | kfree(buffer); |
fceaf24a HJ |
1484 | |
1485 | buffer = packet; | |
1486 | bufferlen = netPacketSize; | |
1487 | } | |
1488 | ||
1489 | break; | |
1490 | } | |
1491 | } | |
454f18a9 | 1492 | else if (ret == -2) /* Handle large packet */ |
fceaf24a | 1493 | { |
0a72f3cf | 1494 | buffer = kmalloc(bytesRecvd, GFP_ATOMIC); |
fceaf24a HJ |
1495 | if (buffer == NULL) |
1496 | { | |
454f18a9 | 1497 | /* Try again next time around */ |
fceaf24a HJ |
1498 | DPRINT_ERR(NETVSC, "unable to allocate buffer of size (%d)!!", bytesRecvd); |
1499 | break; | |
1500 | } | |
1501 | ||
1502 | bufferlen = bytesRecvd; | |
1503 | } | |
1504 | else | |
1505 | { | |
1506 | ASSERT(0); | |
1507 | } | |
1508 | } while (1); | |
1509 | ||
1510 | PutNetDevice(device); | |
1511 | DPRINT_EXIT(NETVSC); | |
1512 | return; | |
1513 | } |