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" |
645954c5 | 28 | #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} */ |
caf26a31 GKH |
37 | static const struct hv_guid gNetVscDeviceType = { |
38 | .data = { | |
39 | 0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, | |
40 | 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E | |
41 | } | |
fceaf24a HJ |
42 | }; |
43 | ||
44 | ||
454f18a9 | 45 | /* Internal routines */ |
fceaf24a HJ |
46 | static int |
47 | NetVscOnDeviceAdd( | |
3d3b5518 | 48 | struct hv_device *Device, |
fceaf24a HJ |
49 | void *AdditionalInfo |
50 | ); | |
51 | ||
52 | static int | |
53 | NetVscOnDeviceRemove( | |
3d3b5518 | 54 | struct hv_device *Device |
fceaf24a HJ |
55 | ); |
56 | ||
57 | static void | |
58 | NetVscOnCleanup( | |
775ef25e | 59 | struct hv_driver *Driver |
fceaf24a HJ |
60 | ); |
61 | ||
62 | static void | |
63 | NetVscOnChannelCallback( | |
8282c400 | 64 | void * context |
fceaf24a HJ |
65 | ); |
66 | ||
67 | static int | |
68 | NetVscInitializeSendBufferWithNetVsp( | |
3d3b5518 | 69 | struct hv_device *Device |
fceaf24a HJ |
70 | ); |
71 | ||
72 | static int | |
73 | NetVscInitializeReceiveBufferWithNetVsp( | |
3d3b5518 | 74 | struct hv_device *Device |
fceaf24a HJ |
75 | ); |
76 | ||
77 | static int | |
78 | NetVscDestroySendBuffer( | |
d1af1db7 | 79 | struct NETVSC_DEVICE *NetDevice |
fceaf24a HJ |
80 | ); |
81 | ||
82 | static int | |
83 | NetVscDestroyReceiveBuffer( | |
d1af1db7 | 84 | struct NETVSC_DEVICE *NetDevice |
fceaf24a HJ |
85 | ); |
86 | ||
87 | static int | |
88 | NetVscConnectToVsp( | |
3d3b5518 | 89 | struct hv_device *Device |
fceaf24a HJ |
90 | ); |
91 | ||
92 | static void | |
93 | NetVscOnSendCompletion( | |
3d3b5518 | 94 | struct hv_device *Device, |
8dc0a06a | 95 | struct vmpacket_descriptor *Packet |
fceaf24a HJ |
96 | ); |
97 | ||
98 | static int | |
99 | NetVscOnSend( | |
3d3b5518 | 100 | struct hv_device *Device, |
4193d4f4 | 101 | struct hv_netvsc_packet *Packet |
fceaf24a HJ |
102 | ); |
103 | ||
104 | static void | |
105 | NetVscOnReceive( | |
3d3b5518 | 106 | struct hv_device *Device, |
8dc0a06a | 107 | struct vmpacket_descriptor *Packet |
fceaf24a HJ |
108 | ); |
109 | ||
110 | static void | |
111 | NetVscOnReceiveCompletion( | |
8282c400 | 112 | void * Context |
fceaf24a HJ |
113 | ); |
114 | ||
115 | static void | |
116 | NetVscSendReceiveCompletion( | |
3d3b5518 | 117 | struct hv_device *Device, |
59471438 | 118 | u64 TransactionId |
fceaf24a HJ |
119 | ); |
120 | ||
3d3b5518 | 121 | static inline struct NETVSC_DEVICE *AllocNetDevice(struct hv_device *Device) |
fceaf24a | 122 | { |
d1af1db7 | 123 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 124 | |
d1af1db7 | 125 | netDevice = kzalloc(sizeof(struct NETVSC_DEVICE), GFP_KERNEL); |
fceaf24a HJ |
126 | if (!netDevice) |
127 | return NULL; | |
128 | ||
454f18a9 | 129 | /* Set to 2 to allow both inbound and outbound traffic */ |
f4888417 | 130 | atomic_cmpxchg(&netDevice->RefCount, 0, 2); |
fceaf24a HJ |
131 | |
132 | netDevice->Device = Device; | |
133 | Device->Extension = netDevice; | |
134 | ||
135 | return netDevice; | |
136 | } | |
137 | ||
d1af1db7 | 138 | static inline void FreeNetDevice(struct NETVSC_DEVICE *Device) |
fceaf24a | 139 | { |
f4888417 | 140 | ASSERT(atomic_read(&Device->RefCount) == 0); |
fceaf24a | 141 | Device->Device->Extension = NULL; |
8c69f52a | 142 | kfree(Device); |
fceaf24a HJ |
143 | } |
144 | ||
145 | ||
454f18a9 | 146 | /* Get the net device object iff exists and its refcount > 1 */ |
3d3b5518 | 147 | static inline struct NETVSC_DEVICE *GetOutboundNetDevice(struct hv_device *Device) |
fceaf24a | 148 | { |
d1af1db7 | 149 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 150 | |
d1af1db7 | 151 | netDevice = (struct NETVSC_DEVICE*)Device->Extension; |
f4888417 BP |
152 | if (netDevice && atomic_read(&netDevice->RefCount) > 1) |
153 | atomic_inc(&netDevice->RefCount); | |
fceaf24a | 154 | else |
fceaf24a | 155 | netDevice = NULL; |
fceaf24a HJ |
156 | |
157 | return netDevice; | |
158 | } | |
159 | ||
454f18a9 | 160 | /* Get the net device object iff exists and its refcount > 0 */ |
3d3b5518 | 161 | static inline struct NETVSC_DEVICE *GetInboundNetDevice(struct hv_device *Device) |
fceaf24a | 162 | { |
d1af1db7 | 163 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 164 | |
d1af1db7 | 165 | netDevice = (struct NETVSC_DEVICE*)Device->Extension; |
f4888417 BP |
166 | if (netDevice && atomic_read(&netDevice->RefCount)) |
167 | atomic_inc(&netDevice->RefCount); | |
fceaf24a | 168 | else |
fceaf24a | 169 | netDevice = NULL; |
fceaf24a HJ |
170 | |
171 | return netDevice; | |
172 | } | |
173 | ||
3d3b5518 | 174 | static inline void PutNetDevice(struct hv_device *Device) |
fceaf24a | 175 | { |
d1af1db7 | 176 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 177 | |
d1af1db7 | 178 | netDevice = (struct NETVSC_DEVICE*)Device->Extension; |
fceaf24a HJ |
179 | ASSERT(netDevice); |
180 | ||
f4888417 | 181 | atomic_dec(&netDevice->RefCount); |
fceaf24a HJ |
182 | } |
183 | ||
3d3b5518 | 184 | static inline struct NETVSC_DEVICE *ReleaseOutboundNetDevice(struct hv_device *Device) |
fceaf24a | 185 | { |
d1af1db7 | 186 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 187 | |
d1af1db7 | 188 | netDevice = (struct NETVSC_DEVICE*)Device->Extension; |
fceaf24a HJ |
189 | if (netDevice == NULL) |
190 | return NULL; | |
191 | ||
454f18a9 | 192 | /* Busy wait until the ref drop to 2, then set it to 1 */ |
f4888417 | 193 | while (atomic_cmpxchg(&netDevice->RefCount, 2, 1) != 2) |
fceaf24a | 194 | { |
b4362c9c | 195 | udelay(100); |
fceaf24a HJ |
196 | } |
197 | ||
198 | return netDevice; | |
199 | } | |
200 | ||
3d3b5518 | 201 | static inline struct NETVSC_DEVICE *ReleaseInboundNetDevice(struct hv_device *Device) |
fceaf24a | 202 | { |
d1af1db7 | 203 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 204 | |
d1af1db7 | 205 | netDevice = (struct NETVSC_DEVICE*)Device->Extension; |
fceaf24a HJ |
206 | if (netDevice == NULL) |
207 | return NULL; | |
208 | ||
454f18a9 | 209 | /* Busy wait until the ref drop to 1, then set it to 0 */ |
f4888417 | 210 | while (atomic_cmpxchg(&netDevice->RefCount, 1, 0) != 1) |
fceaf24a | 211 | { |
b4362c9c | 212 | udelay(100); |
fceaf24a HJ |
213 | } |
214 | ||
215 | Device->Extension = NULL; | |
216 | return netDevice; | |
217 | } | |
218 | ||
219 | /*++; | |
220 | ||
221 | ||
222 | Name: | |
223 | NetVscInitialize() | |
224 | ||
225 | Description: | |
226 | Main entry point | |
227 | ||
228 | --*/ | |
229 | int | |
230 | NetVscInitialize( | |
775ef25e | 231 | struct hv_driver *drv |
fceaf24a HJ |
232 | ) |
233 | { | |
7e23a6e9 | 234 | struct netvsc_driver *driver = (struct netvsc_driver *)drv; |
fceaf24a HJ |
235 | int ret=0; |
236 | ||
237 | DPRINT_ENTER(NETVSC); | |
238 | ||
223c1aa6 GKH |
239 | DPRINT_DBG(NETVSC, "sizeof(struct hv_netvsc_packet)=%zd, sizeof(struct nvsp_message)=%zd, sizeof(struct vmtransfer_page_packet_header)=%zd", |
240 | sizeof(struct hv_netvsc_packet), sizeof(struct nvsp_message), sizeof(struct vmtransfer_page_packet_header)); | |
fceaf24a | 241 | |
454f18a9 | 242 | /* Make sure we are at least 2 pages since 1 page is used for control */ |
fceaf24a HJ |
243 | ASSERT(driver->RingBufferSize >= (PAGE_SIZE << 1)); |
244 | ||
245 | drv->name = gDriverName; | |
caf26a31 | 246 | memcpy(&drv->deviceType, &gNetVscDeviceType, sizeof(struct hv_guid)); |
fceaf24a | 247 | |
454f18a9 | 248 | /* Make sure it is set by the caller */ |
fceaf24a HJ |
249 | ASSERT(driver->OnReceiveCallback); |
250 | ASSERT(driver->OnLinkStatusChanged); | |
251 | ||
454f18a9 | 252 | /* Setup the dispatch table */ |
fceaf24a HJ |
253 | driver->Base.OnDeviceAdd = NetVscOnDeviceAdd; |
254 | driver->Base.OnDeviceRemove = NetVscOnDeviceRemove; | |
255 | driver->Base.OnCleanup = NetVscOnCleanup; | |
256 | ||
257 | driver->OnSend = NetVscOnSend; | |
258 | ||
259 | RndisFilterInit(driver); | |
260 | ||
261 | DPRINT_EXIT(NETVSC); | |
262 | ||
263 | return ret; | |
264 | } | |
265 | ||
266 | static int | |
267 | NetVscInitializeReceiveBufferWithNetVsp( | |
3d3b5518 | 268 | struct hv_device *Device |
fceaf24a HJ |
269 | ) |
270 | { | |
271 | int ret=0; | |
d1af1db7 | 272 | struct NETVSC_DEVICE *netDevice; |
223c1aa6 | 273 | struct nvsp_message *initPacket; |
fceaf24a HJ |
274 | |
275 | DPRINT_ENTER(NETVSC); | |
276 | ||
277 | netDevice = GetOutboundNetDevice(Device); | |
278 | if (!netDevice) | |
279 | { | |
280 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
281 | DPRINT_EXIT(NETVSC); | |
282 | return -1; | |
283 | } | |
284 | ASSERT(netDevice->ReceiveBufferSize > 0); | |
454f18a9 | 285 | ASSERT((netDevice->ReceiveBufferSize & (PAGE_SIZE-1)) == 0); /* page-size grandularity */ |
fceaf24a | 286 | |
bfc30aae | 287 | netDevice->ReceiveBuffer = osd_PageAlloc(netDevice->ReceiveBufferSize >> PAGE_SHIFT); |
fceaf24a HJ |
288 | if (!netDevice->ReceiveBuffer) |
289 | { | |
290 | DPRINT_ERR(NETVSC, "unable to allocate receive buffer of size %d", netDevice->ReceiveBufferSize); | |
291 | ret = -1; | |
292 | goto Cleanup; | |
293 | } | |
454f18a9 | 294 | ASSERT(((unsigned long)netDevice->ReceiveBuffer & (PAGE_SIZE-1)) == 0); /* page-aligned buffer */ |
fceaf24a HJ |
295 | |
296 | DPRINT_INFO(NETVSC, "Establishing receive buffer's GPADL..."); | |
297 | ||
454f18a9 BP |
298 | /* |
299 | * Establish the gpadl handle for this buffer on this | |
300 | * channel. Note: This call uses the vmbus connection rather | |
301 | * than the channel to establish the gpadl handle. | |
302 | */ | |
fceaf24a HJ |
303 | ret = Device->Driver->VmbusChannelInterface.EstablishGpadl(Device, |
304 | netDevice->ReceiveBuffer, | |
305 | netDevice->ReceiveBufferSize, | |
306 | &netDevice->ReceiveBufferGpadlHandle); | |
307 | ||
308 | if (ret != 0) | |
309 | { | |
310 | DPRINT_ERR(NETVSC, "unable to establish receive buffer's gpadl"); | |
311 | goto Cleanup; | |
312 | } | |
313 | ||
bfc30aae | 314 | /* osd_WaitEventWait(ext->ChannelInitEvent); */ |
fceaf24a | 315 | |
454f18a9 | 316 | /* Notify the NetVsp of the gpadl handle */ |
fceaf24a HJ |
317 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendReceiveBuffer..."); |
318 | ||
319 | initPacket = &netDevice->ChannelInitPacket; | |
320 | ||
223c1aa6 | 321 | memset(initPacket, 0, sizeof(struct nvsp_message)); |
fceaf24a HJ |
322 | |
323 | initPacket->Header.MessageType = NvspMessage1TypeSendReceiveBuffer; | |
324 | initPacket->Messages.Version1Messages.SendReceiveBuffer.GpadlHandle = netDevice->ReceiveBufferGpadlHandle; | |
325 | initPacket->Messages.Version1Messages.SendReceiveBuffer.Id = NETVSC_RECEIVE_BUFFER_ID; | |
326 | ||
454f18a9 | 327 | /* Send the gpadl notification request */ |
fceaf24a HJ |
328 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
329 | initPacket, | |
223c1aa6 | 330 | sizeof(struct nvsp_message), |
c4b0bc94 | 331 | (unsigned long)initPacket, |
fceaf24a HJ |
332 | VmbusPacketTypeDataInBand, |
333 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
334 | if (ret != 0) | |
335 | { | |
336 | DPRINT_ERR(NETVSC, "unable to send receive buffer's gpadl to netvsp"); | |
337 | goto Cleanup; | |
338 | } | |
339 | ||
bfc30aae | 340 | osd_WaitEventWait(netDevice->ChannelInitEvent); |
fceaf24a | 341 | |
454f18a9 | 342 | /* Check the response */ |
fceaf24a HJ |
343 | if (initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Status != NvspStatusSuccess) |
344 | { | |
345 | DPRINT_ERR(NETVSC, | |
346 | "Unable to complete receive buffer initialzation with NetVsp - status %d", | |
347 | initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Status); | |
348 | ret = -1; | |
349 | goto Cleanup; | |
350 | } | |
351 | ||
454f18a9 | 352 | /* Parse the response */ |
fceaf24a HJ |
353 | ASSERT(netDevice->ReceiveSectionCount == 0); |
354 | ASSERT(netDevice->ReceiveSections == NULL); | |
355 | ||
356 | netDevice->ReceiveSectionCount = initPacket->Messages.Version1Messages.SendReceiveBufferComplete.NumSections; | |
357 | ||
223c1aa6 | 358 | netDevice->ReceiveSections = kmalloc(netDevice->ReceiveSectionCount * sizeof(struct nvsp_1_receive_buffer_section), GFP_KERNEL); |
fceaf24a HJ |
359 | if (netDevice->ReceiveSections == NULL) |
360 | { | |
361 | ret = -1; | |
362 | goto Cleanup; | |
363 | } | |
364 | ||
365 | memcpy(netDevice->ReceiveSections, | |
366 | initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Sections, | |
223c1aa6 | 367 | netDevice->ReceiveSectionCount * sizeof(struct nvsp_1_receive_buffer_section)); |
fceaf24a HJ |
368 | |
369 | DPRINT_INFO(NETVSC, | |
370 | "Receive sections info (count %d, offset %d, endoffset %d, suballoc size %d, num suballocs %d)", | |
371 | netDevice->ReceiveSectionCount, netDevice->ReceiveSections[0].Offset, netDevice->ReceiveSections[0].EndOffset, | |
372 | netDevice->ReceiveSections[0].SubAllocationSize, netDevice->ReceiveSections[0].NumSubAllocations); | |
373 | ||
374 | ||
454f18a9 | 375 | /* For 1st release, there should only be 1 section that represents the entire receive buffer */ |
fceaf24a HJ |
376 | if (netDevice->ReceiveSectionCount != 1 || |
377 | netDevice->ReceiveSections->Offset != 0 ) | |
378 | { | |
379 | ret = -1; | |
380 | goto Cleanup; | |
381 | } | |
382 | ||
383 | goto Exit; | |
384 | ||
385 | Cleanup: | |
386 | NetVscDestroyReceiveBuffer(netDevice); | |
387 | ||
388 | Exit: | |
389 | PutNetDevice(Device); | |
390 | DPRINT_EXIT(NETVSC); | |
391 | return ret; | |
392 | } | |
393 | ||
394 | ||
395 | static int | |
396 | NetVscInitializeSendBufferWithNetVsp( | |
3d3b5518 | 397 | struct hv_device *Device |
fceaf24a HJ |
398 | ) |
399 | { | |
400 | int ret=0; | |
d1af1db7 | 401 | struct NETVSC_DEVICE *netDevice; |
223c1aa6 | 402 | struct nvsp_message *initPacket; |
fceaf24a HJ |
403 | |
404 | DPRINT_ENTER(NETVSC); | |
405 | ||
406 | netDevice = GetOutboundNetDevice(Device); | |
407 | if (!netDevice) | |
408 | { | |
409 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
410 | DPRINT_EXIT(NETVSC); | |
411 | return -1; | |
412 | } | |
413 | ASSERT(netDevice->SendBufferSize > 0); | |
454f18a9 | 414 | ASSERT((netDevice->SendBufferSize & (PAGE_SIZE-1)) == 0); /* page-size grandularity */ |
fceaf24a | 415 | |
bfc30aae | 416 | netDevice->SendBuffer = osd_PageAlloc(netDevice->SendBufferSize >> PAGE_SHIFT); |
fceaf24a HJ |
417 | if (!netDevice->SendBuffer) |
418 | { | |
419 | DPRINT_ERR(NETVSC, "unable to allocate send buffer of size %d", netDevice->SendBufferSize); | |
420 | ret = -1; | |
421 | goto Cleanup; | |
422 | } | |
454f18a9 | 423 | ASSERT(((unsigned long)netDevice->SendBuffer & (PAGE_SIZE-1)) == 0); /* page-aligned buffer */ |
fceaf24a HJ |
424 | |
425 | DPRINT_INFO(NETVSC, "Establishing send buffer's GPADL..."); | |
426 | ||
454f18a9 BP |
427 | /* |
428 | * Establish the gpadl handle for this buffer on this | |
429 | * channel. Note: This call uses the vmbus connection rather | |
430 | * than the channel to establish the gpadl handle. | |
431 | */ | |
fceaf24a | 432 | ret = Device->Driver->VmbusChannelInterface.EstablishGpadl(Device, |
454f18a9 BP |
433 | netDevice->SendBuffer, |
434 | netDevice->SendBufferSize, | |
435 | &netDevice->SendBufferGpadlHandle); | |
fceaf24a HJ |
436 | |
437 | if (ret != 0) | |
438 | { | |
439 | DPRINT_ERR(NETVSC, "unable to establish send buffer's gpadl"); | |
440 | goto Cleanup; | |
441 | } | |
442 | ||
bfc30aae | 443 | /* osd_WaitEventWait(ext->ChannelInitEvent); */ |
fceaf24a | 444 | |
454f18a9 | 445 | /* Notify the NetVsp of the gpadl handle */ |
fceaf24a HJ |
446 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendSendBuffer..."); |
447 | ||
448 | initPacket = &netDevice->ChannelInitPacket; | |
449 | ||
223c1aa6 | 450 | memset(initPacket, 0, sizeof(struct nvsp_message)); |
fceaf24a HJ |
451 | |
452 | initPacket->Header.MessageType = NvspMessage1TypeSendSendBuffer; | |
453 | initPacket->Messages.Version1Messages.SendReceiveBuffer.GpadlHandle = netDevice->SendBufferGpadlHandle; | |
454 | initPacket->Messages.Version1Messages.SendReceiveBuffer.Id = NETVSC_SEND_BUFFER_ID; | |
455 | ||
454f18a9 | 456 | /* Send the gpadl notification request */ |
fceaf24a HJ |
457 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
458 | initPacket, | |
223c1aa6 | 459 | sizeof(struct nvsp_message), |
c4b0bc94 | 460 | (unsigned long)initPacket, |
fceaf24a HJ |
461 | VmbusPacketTypeDataInBand, |
462 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
463 | if (ret != 0) | |
464 | { | |
465 | DPRINT_ERR(NETVSC, "unable to send receive buffer's gpadl to netvsp"); | |
466 | goto Cleanup; | |
467 | } | |
468 | ||
bfc30aae | 469 | osd_WaitEventWait(netDevice->ChannelInitEvent); |
fceaf24a | 470 | |
454f18a9 | 471 | /* Check the response */ |
fceaf24a HJ |
472 | if (initPacket->Messages.Version1Messages.SendSendBufferComplete.Status != NvspStatusSuccess) |
473 | { | |
474 | DPRINT_ERR(NETVSC, | |
475 | "Unable to complete send buffer initialzation with NetVsp - status %d", | |
476 | initPacket->Messages.Version1Messages.SendSendBufferComplete.Status); | |
477 | ret = -1; | |
478 | goto Cleanup; | |
479 | } | |
480 | ||
481 | netDevice->SendSectionSize = initPacket->Messages.Version1Messages.SendSendBufferComplete.SectionSize; | |
482 | ||
483 | goto Exit; | |
484 | ||
485 | Cleanup: | |
486 | NetVscDestroySendBuffer(netDevice); | |
487 | ||
488 | Exit: | |
489 | PutNetDevice(Device); | |
490 | DPRINT_EXIT(NETVSC); | |
491 | return ret; | |
492 | } | |
493 | ||
494 | static int | |
495 | NetVscDestroyReceiveBuffer( | |
d1af1db7 | 496 | struct NETVSC_DEVICE *NetDevice |
fceaf24a HJ |
497 | ) |
498 | { | |
223c1aa6 | 499 | struct nvsp_message *revokePacket; |
fceaf24a HJ |
500 | int ret=0; |
501 | ||
502 | ||
503 | DPRINT_ENTER(NETVSC); | |
504 | ||
454f18a9 BP |
505 | /* |
506 | * If we got a section count, it means we received a | |
507 | * SendReceiveBufferComplete msg (ie sent | |
508 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
509 | * to send a revoke msg here | |
510 | */ | |
fceaf24a HJ |
511 | if (NetDevice->ReceiveSectionCount) |
512 | { | |
513 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeRevokeReceiveBuffer..."); | |
514 | ||
454f18a9 | 515 | /* Send the revoke receive buffer */ |
fceaf24a | 516 | revokePacket = &NetDevice->RevokePacket; |
223c1aa6 | 517 | memset(revokePacket, 0, sizeof(struct nvsp_message)); |
fceaf24a HJ |
518 | |
519 | revokePacket->Header.MessageType = NvspMessage1TypeRevokeReceiveBuffer; | |
520 | revokePacket->Messages.Version1Messages.RevokeReceiveBuffer.Id = NETVSC_RECEIVE_BUFFER_ID; | |
521 | ||
522 | ret = NetDevice->Device->Driver->VmbusChannelInterface.SendPacket(NetDevice->Device, | |
523 | revokePacket, | |
223c1aa6 | 524 | sizeof(struct nvsp_message), |
c4b0bc94 | 525 | (unsigned long)revokePacket, |
fceaf24a HJ |
526 | VmbusPacketTypeDataInBand, |
527 | 0); | |
454f18a9 BP |
528 | /* |
529 | * If we failed here, we might as well return and | |
530 | * have a leak rather than continue and a bugchk | |
531 | */ | |
fceaf24a HJ |
532 | if (ret != 0) |
533 | { | |
534 | DPRINT_ERR(NETVSC, "unable to send revoke receive buffer to netvsp"); | |
535 | DPRINT_EXIT(NETVSC); | |
536 | return -1; | |
537 | } | |
538 | } | |
539 | ||
454f18a9 | 540 | /* Teardown the gpadl on the vsp end */ |
fceaf24a HJ |
541 | if (NetDevice->ReceiveBufferGpadlHandle) |
542 | { | |
543 | DPRINT_INFO(NETVSC, "Tearing down receive buffer's GPADL..."); | |
544 | ||
545 | ret = NetDevice->Device->Driver->VmbusChannelInterface.TeardownGpadl(NetDevice->Device, | |
546 | NetDevice->ReceiveBufferGpadlHandle); | |
547 | ||
454f18a9 | 548 | /* If we failed here, we might as well return and have a leak rather than continue and a bugchk */ |
fceaf24a HJ |
549 | if (ret != 0) |
550 | { | |
551 | DPRINT_ERR(NETVSC, "unable to teardown receive buffer's gpadl"); | |
552 | DPRINT_EXIT(NETVSC); | |
553 | return -1; | |
554 | } | |
555 | NetDevice->ReceiveBufferGpadlHandle = 0; | |
556 | } | |
557 | ||
558 | if (NetDevice->ReceiveBuffer) | |
559 | { | |
560 | DPRINT_INFO(NETVSC, "Freeing up receive buffer..."); | |
561 | ||
454f18a9 | 562 | /* Free up the receive buffer */ |
bfc30aae | 563 | osd_PageFree(NetDevice->ReceiveBuffer, NetDevice->ReceiveBufferSize >> PAGE_SHIFT); |
fceaf24a HJ |
564 | NetDevice->ReceiveBuffer = NULL; |
565 | } | |
566 | ||
567 | if (NetDevice->ReceiveSections) | |
568 | { | |
8c69f52a | 569 | kfree(NetDevice->ReceiveSections); |
fceaf24a HJ |
570 | NetDevice->ReceiveSections = NULL; |
571 | NetDevice->ReceiveSectionCount = 0; | |
572 | } | |
573 | ||
574 | DPRINT_EXIT(NETVSC); | |
575 | ||
576 | return ret; | |
577 | } | |
578 | ||
579 | ||
580 | ||
581 | ||
582 | static int | |
583 | NetVscDestroySendBuffer( | |
d1af1db7 | 584 | struct NETVSC_DEVICE *NetDevice |
fceaf24a HJ |
585 | ) |
586 | { | |
223c1aa6 | 587 | struct nvsp_message *revokePacket; |
fceaf24a HJ |
588 | int ret=0; |
589 | ||
590 | ||
591 | DPRINT_ENTER(NETVSC); | |
592 | ||
454f18a9 BP |
593 | /* |
594 | * If we got a section count, it means we received a | |
595 | * SendReceiveBufferComplete msg (ie sent | |
596 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
597 | * to send a revoke msg here | |
598 | */ | |
fceaf24a HJ |
599 | if (NetDevice->SendSectionSize) |
600 | { | |
601 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeRevokeSendBuffer..."); | |
602 | ||
454f18a9 | 603 | /* Send the revoke send buffer */ |
fceaf24a | 604 | revokePacket = &NetDevice->RevokePacket; |
223c1aa6 | 605 | memset(revokePacket, 0, sizeof(struct nvsp_message)); |
fceaf24a HJ |
606 | |
607 | revokePacket->Header.MessageType = NvspMessage1TypeRevokeSendBuffer; | |
608 | revokePacket->Messages.Version1Messages.RevokeSendBuffer.Id = NETVSC_SEND_BUFFER_ID; | |
609 | ||
610 | ret = NetDevice->Device->Driver->VmbusChannelInterface.SendPacket(NetDevice->Device, | |
611 | revokePacket, | |
223c1aa6 | 612 | sizeof(struct nvsp_message), |
c4b0bc94 | 613 | (unsigned long)revokePacket, |
fceaf24a HJ |
614 | VmbusPacketTypeDataInBand, |
615 | 0); | |
454f18a9 | 616 | /* If we failed here, we might as well return and have a leak rather than continue and a bugchk */ |
fceaf24a HJ |
617 | if (ret != 0) |
618 | { | |
619 | DPRINT_ERR(NETVSC, "unable to send revoke send buffer to netvsp"); | |
620 | DPRINT_EXIT(NETVSC); | |
621 | return -1; | |
622 | } | |
623 | } | |
624 | ||
454f18a9 | 625 | /* Teardown the gpadl on the vsp end */ |
fceaf24a HJ |
626 | if (NetDevice->SendBufferGpadlHandle) |
627 | { | |
628 | DPRINT_INFO(NETVSC, "Tearing down send buffer's GPADL..."); | |
629 | ||
630 | ret = NetDevice->Device->Driver->VmbusChannelInterface.TeardownGpadl(NetDevice->Device, | |
631 | NetDevice->SendBufferGpadlHandle); | |
632 | ||
454f18a9 | 633 | /* If we failed here, we might as well return and have a leak rather than continue and a bugchk */ |
fceaf24a HJ |
634 | if (ret != 0) |
635 | { | |
636 | DPRINT_ERR(NETVSC, "unable to teardown send buffer's gpadl"); | |
637 | DPRINT_EXIT(NETVSC); | |
638 | return -1; | |
639 | } | |
640 | NetDevice->SendBufferGpadlHandle = 0; | |
641 | } | |
642 | ||
643 | if (NetDevice->SendBuffer) | |
644 | { | |
645 | DPRINT_INFO(NETVSC, "Freeing up send buffer..."); | |
646 | ||
454f18a9 | 647 | /* Free up the receive buffer */ |
bfc30aae | 648 | osd_PageFree(NetDevice->SendBuffer, NetDevice->SendBufferSize >> PAGE_SHIFT); |
fceaf24a HJ |
649 | NetDevice->SendBuffer = NULL; |
650 | } | |
651 | ||
652 | DPRINT_EXIT(NETVSC); | |
653 | ||
654 | return ret; | |
655 | } | |
656 | ||
657 | ||
658 | ||
659 | static int | |
660 | NetVscConnectToVsp( | |
3d3b5518 | 661 | struct hv_device *Device |
fceaf24a HJ |
662 | ) |
663 | { | |
664 | int ret=0; | |
d1af1db7 | 665 | struct NETVSC_DEVICE *netDevice; |
223c1aa6 | 666 | struct nvsp_message *initPacket; |
fceaf24a HJ |
667 | int ndisVersion; |
668 | ||
669 | DPRINT_ENTER(NETVSC); | |
670 | ||
671 | netDevice = GetOutboundNetDevice(Device); | |
672 | if (!netDevice) | |
673 | { | |
674 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
675 | DPRINT_EXIT(NETVSC); | |
676 | return -1; | |
677 | } | |
678 | ||
679 | initPacket = &netDevice->ChannelInitPacket; | |
680 | ||
223c1aa6 | 681 | memset(initPacket, 0, sizeof(struct nvsp_message)); |
fceaf24a HJ |
682 | initPacket->Header.MessageType = NvspMessageTypeInit; |
683 | initPacket->Messages.InitMessages.Init.MinProtocolVersion = NVSP_MIN_PROTOCOL_VERSION; | |
684 | initPacket->Messages.InitMessages.Init.MaxProtocolVersion = NVSP_MAX_PROTOCOL_VERSION; | |
685 | ||
686 | DPRINT_INFO(NETVSC, "Sending NvspMessageTypeInit..."); | |
687 | ||
454f18a9 | 688 | /* Send the init request */ |
fceaf24a HJ |
689 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
690 | initPacket, | |
223c1aa6 | 691 | sizeof(struct nvsp_message), |
c4b0bc94 | 692 | (unsigned long)initPacket, |
fceaf24a HJ |
693 | VmbusPacketTypeDataInBand, |
694 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
695 | ||
696 | if( ret != 0) | |
697 | { | |
698 | DPRINT_ERR(NETVSC, "unable to send NvspMessageTypeInit"); | |
699 | goto Cleanup; | |
700 | } | |
701 | ||
bfc30aae | 702 | osd_WaitEventWait(netDevice->ChannelInitEvent); |
fceaf24a | 703 | |
454f18a9 BP |
704 | /* Now, check the response */ |
705 | /* ASSERT(initPacket->Messages.InitMessages.InitComplete.MaximumMdlChainLength <= MAX_MULTIPAGE_BUFFER_COUNT); */ | |
fceaf24a HJ |
706 | DPRINT_INFO(NETVSC, "NvspMessageTypeInit status(%d) max mdl chain (%d)", |
707 | initPacket->Messages.InitMessages.InitComplete.Status, | |
708 | initPacket->Messages.InitMessages.InitComplete.MaximumMdlChainLength); | |
709 | ||
710 | if (initPacket->Messages.InitMessages.InitComplete.Status != NvspStatusSuccess) | |
711 | { | |
712 | DPRINT_ERR(NETVSC, "unable to initialize with netvsp (status 0x%x)", initPacket->Messages.InitMessages.InitComplete.Status); | |
713 | ret = -1; | |
714 | goto Cleanup; | |
715 | } | |
716 | ||
717 | if (initPacket->Messages.InitMessages.InitComplete.NegotiatedProtocolVersion != NVSP_PROTOCOL_VERSION_1) | |
718 | { | |
719 | DPRINT_ERR(NETVSC, "unable to initialize with netvsp (version expected 1 got %d)", | |
720 | initPacket->Messages.InitMessages.InitComplete.NegotiatedProtocolVersion); | |
721 | ret = -1; | |
722 | goto Cleanup; | |
723 | } | |
724 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendNdisVersion..."); | |
725 | ||
454f18a9 | 726 | /* Send the ndis version */ |
223c1aa6 | 727 | memset(initPacket, 0, sizeof(struct nvsp_message)); |
fceaf24a HJ |
728 | |
729 | ndisVersion = 0x00050000; | |
730 | ||
731 | initPacket->Header.MessageType = NvspMessage1TypeSendNdisVersion; | |
732 | initPacket->Messages.Version1Messages.SendNdisVersion.NdisMajorVersion = (ndisVersion & 0xFFFF0000) >> 16; | |
733 | initPacket->Messages.Version1Messages.SendNdisVersion.NdisMinorVersion = ndisVersion & 0xFFFF; | |
734 | ||
454f18a9 | 735 | /* Send the init request */ |
fceaf24a HJ |
736 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
737 | initPacket, | |
223c1aa6 | 738 | sizeof(struct nvsp_message), |
c4b0bc94 | 739 | (unsigned long)initPacket, |
fceaf24a HJ |
740 | VmbusPacketTypeDataInBand, |
741 | 0); | |
742 | if (ret != 0) | |
743 | { | |
744 | DPRINT_ERR(NETVSC, "unable to send NvspMessage1TypeSendNdisVersion"); | |
745 | ret = -1; | |
746 | goto Cleanup; | |
747 | } | |
454f18a9 BP |
748 | /* |
749 | * BUGBUG - We have to wait for the above msg since the | |
750 | * netvsp uses KMCL which acknowledges packet (completion | |
751 | * packet) since our Vmbus always set the | |
752 | * VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED flag | |
753 | */ | |
bfc30aae | 754 | /* osd_WaitEventWait(NetVscChannel->ChannelInitEvent); */ |
454f18a9 BP |
755 | |
756 | /* Post the big receive buffer to NetVSP */ | |
fceaf24a HJ |
757 | ret = NetVscInitializeReceiveBufferWithNetVsp(Device); |
758 | if (ret == 0) | |
759 | { | |
760 | ret = NetVscInitializeSendBufferWithNetVsp(Device); | |
761 | } | |
762 | ||
763 | Cleanup: | |
764 | PutNetDevice(Device); | |
765 | DPRINT_EXIT(NETVSC); | |
766 | return ret; | |
767 | } | |
768 | ||
769 | static void | |
770 | NetVscDisconnectFromVsp( | |
d1af1db7 | 771 | struct NETVSC_DEVICE *NetDevice |
fceaf24a HJ |
772 | ) |
773 | { | |
774 | DPRINT_ENTER(NETVSC); | |
775 | ||
776 | NetVscDestroyReceiveBuffer(NetDevice); | |
777 | NetVscDestroySendBuffer(NetDevice); | |
778 | ||
779 | DPRINT_EXIT(NETVSC); | |
780 | } | |
781 | ||
782 | ||
783 | /*++ | |
784 | ||
785 | Name: | |
786 | NetVscOnDeviceAdd() | |
787 | ||
788 | Description: | |
789 | Callback when the device belonging to this driver is added | |
790 | ||
791 | --*/ | |
bd1de709 | 792 | static int |
fceaf24a | 793 | NetVscOnDeviceAdd( |
3d3b5518 | 794 | struct hv_device *Device, |
fceaf24a HJ |
795 | void *AdditionalInfo |
796 | ) | |
797 | { | |
798 | int ret=0; | |
799 | int i; | |
800 | ||
d1af1db7 | 801 | struct NETVSC_DEVICE *netDevice; |
4193d4f4 | 802 | struct hv_netvsc_packet *packet; |
fceaf24a HJ |
803 | LIST_ENTRY *entry; |
804 | ||
7e23a6e9 | 805 | struct netvsc_driver *netDriver = (struct netvsc_driver *)Device->Driver; |
fceaf24a HJ |
806 | |
807 | DPRINT_ENTER(NETVSC); | |
808 | ||
809 | netDevice = AllocNetDevice(Device); | |
810 | if (!netDevice) | |
811 | { | |
812 | ret = -1; | |
813 | goto Cleanup; | |
814 | } | |
815 | ||
816 | DPRINT_DBG(NETVSC, "netvsc channel object allocated - %p", netDevice); | |
817 | ||
454f18a9 | 818 | /* Initialize the NetVSC channel extension */ |
fceaf24a | 819 | netDevice->ReceiveBufferSize = NETVSC_RECEIVE_BUFFER_SIZE; |
6436873a | 820 | spin_lock_init(&netDevice->receive_packet_list_lock); |
fceaf24a HJ |
821 | |
822 | netDevice->SendBufferSize = NETVSC_SEND_BUFFER_SIZE; | |
823 | ||
824 | INITIALIZE_LIST_HEAD(&netDevice->ReceivePacketList); | |
825 | ||
826 | for (i=0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++) | |
827 | { | |
ee3d7ddf | 828 | packet = kzalloc(sizeof(struct hv_netvsc_packet) + (NETVSC_RECEIVE_SG_COUNT* sizeof(struct hv_page_buffer)), GFP_KERNEL); |
fceaf24a HJ |
829 | if (!packet) |
830 | { | |
831 | DPRINT_DBG(NETVSC, "unable to allocate netvsc pkts for receive pool (wanted %d got %d)", NETVSC_RECEIVE_PACKETLIST_COUNT, i); | |
832 | break; | |
833 | } | |
834 | ||
835 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->ListEntry); | |
836 | } | |
bfc30aae | 837 | netDevice->ChannelInitEvent = osd_WaitEventCreate(); |
fceaf24a | 838 | |
454f18a9 | 839 | /* Open the channel */ |
fceaf24a | 840 | ret = Device->Driver->VmbusChannelInterface.Open(Device, |
454f18a9 BP |
841 | netDriver->RingBufferSize, |
842 | netDriver->RingBufferSize, | |
843 | NULL, 0, | |
844 | NetVscOnChannelCallback, | |
845 | Device | |
846 | ); | |
fceaf24a HJ |
847 | |
848 | if (ret != 0) | |
849 | { | |
850 | DPRINT_ERR(NETVSC, "unable to open channel: %d", ret); | |
851 | ret = -1; | |
852 | goto Cleanup; | |
853 | } | |
854 | ||
454f18a9 | 855 | /* Channel is opened */ |
fceaf24a HJ |
856 | DPRINT_INFO(NETVSC, "*** NetVSC channel opened successfully! ***"); |
857 | ||
454f18a9 | 858 | /* Connect with the NetVsp */ |
fceaf24a HJ |
859 | ret = NetVscConnectToVsp(Device); |
860 | if (ret != 0) | |
861 | { | |
862 | DPRINT_ERR(NETVSC, "unable to connect to NetVSP - %d", ret); | |
863 | ret = -1; | |
864 | goto Close; | |
865 | } | |
866 | ||
867 | DPRINT_INFO(NETVSC, "*** NetVSC channel handshake result - %d ***", ret); | |
868 | ||
869 | DPRINT_EXIT(NETVSC); | |
870 | return ret; | |
871 | ||
872 | Close: | |
454f18a9 | 873 | /* Now, we can close the channel safely */ |
fceaf24a HJ |
874 | Device->Driver->VmbusChannelInterface.Close(Device); |
875 | ||
876 | Cleanup: | |
877 | ||
878 | if (netDevice) | |
879 | { | |
420beac4 | 880 | kfree(netDevice->ChannelInitEvent); |
fceaf24a HJ |
881 | |
882 | while (!IsListEmpty(&netDevice->ReceivePacketList)) | |
883 | { | |
884 | entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList); | |
4193d4f4 | 885 | packet = CONTAINING_RECORD(entry, struct hv_netvsc_packet, ListEntry); |
8c69f52a | 886 | kfree(packet); |
fceaf24a HJ |
887 | } |
888 | ||
fceaf24a HJ |
889 | ReleaseOutboundNetDevice(Device); |
890 | ReleaseInboundNetDevice(Device); | |
891 | ||
892 | FreeNetDevice(netDevice); | |
893 | } | |
894 | ||
895 | DPRINT_EXIT(NETVSC); | |
896 | return ret; | |
897 | } | |
898 | ||
899 | ||
900 | /*++ | |
901 | ||
902 | Name: | |
903 | NetVscOnDeviceRemove() | |
904 | ||
905 | Description: | |
906 | Callback when the root bus device is removed | |
907 | ||
908 | --*/ | |
bd1de709 | 909 | static int |
fceaf24a | 910 | NetVscOnDeviceRemove( |
3d3b5518 | 911 | struct hv_device *Device |
fceaf24a HJ |
912 | ) |
913 | { | |
d1af1db7 | 914 | struct NETVSC_DEVICE *netDevice; |
4193d4f4 | 915 | struct hv_netvsc_packet *netvscPacket; |
fceaf24a HJ |
916 | int ret=0; |
917 | LIST_ENTRY *entry; | |
918 | ||
919 | DPRINT_ENTER(NETVSC); | |
920 | ||
921 | DPRINT_INFO(NETVSC, "Disabling outbound traffic on net device (%p)...", Device->Extension); | |
922 | ||
454f18a9 | 923 | /* Stop outbound traffic ie sends and receives completions */ |
fceaf24a HJ |
924 | netDevice = ReleaseOutboundNetDevice(Device); |
925 | if (!netDevice) | |
926 | { | |
927 | DPRINT_ERR(NETVSC, "No net device present!!"); | |
928 | return -1; | |
929 | } | |
930 | ||
454f18a9 | 931 | /* Wait for all send completions */ |
f4888417 | 932 | while (atomic_read(&netDevice->NumOutstandingSends)) |
fceaf24a | 933 | { |
f4888417 | 934 | DPRINT_INFO(NETVSC, "waiting for %d requests to complete...", atomic_read(&netDevice->NumOutstandingSends)); |
fceaf24a | 935 | |
b4362c9c | 936 | udelay(100); |
fceaf24a HJ |
937 | } |
938 | ||
939 | DPRINT_INFO(NETVSC, "Disconnecting from netvsp..."); | |
940 | ||
941 | NetVscDisconnectFromVsp(netDevice); | |
942 | ||
943 | DPRINT_INFO(NETVSC, "Disabling inbound traffic on net device (%p)...", Device->Extension); | |
944 | ||
454f18a9 | 945 | /* Stop inbound traffic ie receives and sends completions */ |
fceaf24a HJ |
946 | netDevice = ReleaseInboundNetDevice(Device); |
947 | ||
454f18a9 | 948 | /* At this point, no one should be accessing netDevice except in here */ |
fceaf24a HJ |
949 | DPRINT_INFO(NETVSC, "net device (%p) safe to remove", netDevice); |
950 | ||
454f18a9 | 951 | /* Now, we can close the channel safely */ |
fceaf24a HJ |
952 | Device->Driver->VmbusChannelInterface.Close(Device); |
953 | ||
454f18a9 | 954 | /* Release all resources */ |
fceaf24a HJ |
955 | while (!IsListEmpty(&netDevice->ReceivePacketList)) |
956 | { | |
957 | entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList); | |
4193d4f4 | 958 | netvscPacket = CONTAINING_RECORD(entry, struct hv_netvsc_packet, ListEntry); |
fceaf24a | 959 | |
8c69f52a | 960 | kfree(netvscPacket); |
fceaf24a HJ |
961 | } |
962 | ||
420beac4 | 963 | kfree(netDevice->ChannelInitEvent); |
fceaf24a HJ |
964 | FreeNetDevice(netDevice); |
965 | ||
966 | DPRINT_EXIT(NETVSC); | |
967 | return ret; | |
968 | } | |
969 | ||
970 | ||
971 | ||
972 | /*++ | |
973 | ||
974 | Name: | |
975 | NetVscOnCleanup() | |
976 | ||
977 | Description: | |
978 | Perform any cleanup when the driver is removed | |
979 | ||
980 | --*/ | |
bd1de709 | 981 | static void |
fceaf24a | 982 | NetVscOnCleanup( |
775ef25e | 983 | struct hv_driver *drv |
fceaf24a HJ |
984 | ) |
985 | { | |
986 | DPRINT_ENTER(NETVSC); | |
987 | ||
988 | DPRINT_EXIT(NETVSC); | |
989 | } | |
990 | ||
991 | static void | |
992 | NetVscOnSendCompletion( | |
3d3b5518 | 993 | struct hv_device *Device, |
8dc0a06a | 994 | struct vmpacket_descriptor *Packet |
fceaf24a HJ |
995 | ) |
996 | { | |
d1af1db7 | 997 | struct NETVSC_DEVICE *netDevice; |
223c1aa6 | 998 | struct nvsp_message *nvspPacket; |
4193d4f4 | 999 | struct hv_netvsc_packet *nvscPacket; |
fceaf24a HJ |
1000 | |
1001 | DPRINT_ENTER(NETVSC); | |
1002 | ||
1003 | netDevice = GetInboundNetDevice(Device); | |
1004 | if (!netDevice) | |
1005 | { | |
1006 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
1007 | DPRINT_EXIT(NETVSC); | |
1008 | return; | |
1009 | } | |
1010 | ||
223c1aa6 | 1011 | nvspPacket = (struct nvsp_message *)((unsigned long)Packet + (Packet->DataOffset8 << 3)); |
fceaf24a HJ |
1012 | |
1013 | DPRINT_DBG(NETVSC, "send completion packet - type %d", nvspPacket->Header.MessageType); | |
1014 | ||
1015 | if (nvspPacket->Header.MessageType == NvspMessageTypeInitComplete || | |
1016 | nvspPacket->Header.MessageType == NvspMessage1TypeSendReceiveBufferComplete || | |
1017 | nvspPacket->Header.MessageType == NvspMessage1TypeSendSendBufferComplete) | |
1018 | { | |
454f18a9 | 1019 | /* Copy the response back */ |
223c1aa6 | 1020 | memcpy(&netDevice->ChannelInitPacket, nvspPacket, sizeof(struct nvsp_message)); |
bfc30aae | 1021 | osd_WaitEventSet(netDevice->ChannelInitEvent); |
fceaf24a HJ |
1022 | } |
1023 | else if (nvspPacket->Header.MessageType == NvspMessage1TypeSendRNDISPacketComplete) | |
1024 | { | |
454f18a9 | 1025 | /* Get the send context */ |
4193d4f4 | 1026 | nvscPacket = (struct hv_netvsc_packet *)(unsigned long)Packet->TransactionId; |
fceaf24a HJ |
1027 | ASSERT(nvscPacket); |
1028 | ||
454f18a9 | 1029 | /* Notify the layer above us */ |
fceaf24a HJ |
1030 | nvscPacket->Completion.Send.OnSendCompletion(nvscPacket->Completion.Send.SendCompletionContext); |
1031 | ||
f4888417 | 1032 | atomic_dec(&netDevice->NumOutstandingSends); |
fceaf24a HJ |
1033 | } |
1034 | else | |
1035 | { | |
1036 | DPRINT_ERR(NETVSC, "Unknown send completion packet type - %d received!!", nvspPacket->Header.MessageType); | |
1037 | } | |
1038 | ||
1039 | PutNetDevice(Device); | |
1040 | DPRINT_EXIT(NETVSC); | |
1041 | } | |
1042 | ||
1043 | ||
1044 | ||
1045 | static int | |
1046 | NetVscOnSend( | |
3d3b5518 | 1047 | struct hv_device *Device, |
4193d4f4 | 1048 | struct hv_netvsc_packet *Packet |
fceaf24a HJ |
1049 | ) |
1050 | { | |
d1af1db7 | 1051 | struct NETVSC_DEVICE *netDevice; |
fceaf24a HJ |
1052 | int ret=0; |
1053 | ||
223c1aa6 | 1054 | struct nvsp_message sendMessage; |
fceaf24a HJ |
1055 | |
1056 | DPRINT_ENTER(NETVSC); | |
1057 | ||
1058 | netDevice = GetOutboundNetDevice(Device); | |
1059 | if (!netDevice) | |
1060 | { | |
1061 | DPRINT_ERR(NETVSC, "net device (%p) shutting down...ignoring outbound packets", netDevice); | |
1062 | DPRINT_EXIT(NETVSC); | |
1063 | return -2; | |
1064 | } | |
1065 | ||
1066 | sendMessage.Header.MessageType = NvspMessage1TypeSendRNDISPacket; | |
1067 | if (Packet->IsDataPacket) | |
454f18a9 | 1068 | sendMessage.Messages.Version1Messages.SendRNDISPacket.ChannelType = 0;/* 0 is RMC_DATA; */ |
fceaf24a | 1069 | else |
454f18a9 | 1070 | sendMessage.Messages.Version1Messages.SendRNDISPacket.ChannelType = 1;/* 1 is RMC_CONTROL; */ |
fceaf24a | 1071 | |
454f18a9 | 1072 | /* Not using send buffer section */ |
fceaf24a HJ |
1073 | sendMessage.Messages.Version1Messages.SendRNDISPacket.SendBufferSectionIndex = 0xFFFFFFFF; |
1074 | sendMessage.Messages.Version1Messages.SendRNDISPacket.SendBufferSectionSize = 0; | |
1075 | ||
1076 | if (Packet->PageBufferCount) | |
1077 | { | |
1078 | ret = Device->Driver->VmbusChannelInterface.SendPacketPageBuffer(Device, | |
1079 | Packet->PageBuffers, | |
1080 | Packet->PageBufferCount, | |
1081 | &sendMessage, | |
223c1aa6 | 1082 | sizeof(struct nvsp_message), |
c4b0bc94 | 1083 | (unsigned long)Packet); |
fceaf24a HJ |
1084 | } |
1085 | else | |
1086 | { | |
1087 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, | |
1088 | &sendMessage, | |
223c1aa6 | 1089 | sizeof(struct nvsp_message), |
c4b0bc94 | 1090 | (unsigned long)Packet, |
fceaf24a HJ |
1091 | VmbusPacketTypeDataInBand, |
1092 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
1093 | ||
1094 | } | |
1095 | ||
1096 | if (ret != 0) | |
1097 | { | |
1098 | DPRINT_ERR(NETVSC, "Unable to send packet %p ret %d", Packet, ret); | |
1099 | } | |
1100 | ||
f4888417 | 1101 | atomic_inc(&netDevice->NumOutstandingSends); |
fceaf24a HJ |
1102 | PutNetDevice(Device); |
1103 | ||
1104 | DPRINT_EXIT(NETVSC); | |
1105 | return ret; | |
1106 | } | |
1107 | ||
1108 | ||
1109 | static void | |
1110 | NetVscOnReceive( | |
3d3b5518 | 1111 | struct hv_device *Device, |
8dc0a06a | 1112 | struct vmpacket_descriptor *Packet |
fceaf24a HJ |
1113 | ) |
1114 | { | |
d1af1db7 | 1115 | struct NETVSC_DEVICE *netDevice; |
8dc0a06a | 1116 | struct vmtransfer_page_packet_header *vmxferpagePacket; |
223c1aa6 | 1117 | struct nvsp_message *nvspPacket; |
4193d4f4 | 1118 | struct hv_netvsc_packet *netvscPacket=NULL; |
fceaf24a | 1119 | LIST_ENTRY* entry; |
c4b0bc94 GKH |
1120 | unsigned long start; |
1121 | unsigned long end, endVirtual; | |
7e23a6e9 GKH |
1122 | /* struct netvsc_driver *netvscDriver; */ |
1123 | struct xferpage_packet *xferpagePacket=NULL; | |
fceaf24a HJ |
1124 | LIST_ENTRY listHead; |
1125 | ||
1126 | int i=0, j=0; | |
1127 | int count=0, bytesRemain=0; | |
6436873a | 1128 | unsigned long flags; |
fceaf24a HJ |
1129 | |
1130 | DPRINT_ENTER(NETVSC); | |
1131 | ||
1132 | netDevice = GetInboundNetDevice(Device); | |
1133 | if (!netDevice) | |
1134 | { | |
1135 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
1136 | DPRINT_EXIT(NETVSC); | |
1137 | return; | |
1138 | } | |
1139 | ||
454f18a9 | 1140 | /* All inbound packets other than send completion should be xfer page packet */ |
fceaf24a HJ |
1141 | if (Packet->Type != VmbusPacketTypeDataUsingTransferPages) |
1142 | { | |
1143 | DPRINT_ERR(NETVSC, "Unknown packet type received - %d", Packet->Type); | |
1144 | PutNetDevice(Device); | |
1145 | return; | |
1146 | } | |
1147 | ||
223c1aa6 | 1148 | nvspPacket = (struct nvsp_message*)((unsigned long)Packet + (Packet->DataOffset8 << 3)); |
fceaf24a | 1149 | |
454f18a9 | 1150 | /* Make sure this is a valid nvsp packet */ |
fceaf24a HJ |
1151 | if (nvspPacket->Header.MessageType != NvspMessage1TypeSendRNDISPacket ) |
1152 | { | |
1153 | DPRINT_ERR(NETVSC, "Unknown nvsp packet type received - %d", nvspPacket->Header.MessageType); | |
1154 | PutNetDevice(Device); | |
1155 | return; | |
1156 | } | |
1157 | ||
1158 | DPRINT_DBG(NETVSC, "NVSP packet received - type %d", nvspPacket->Header.MessageType); | |
1159 | ||
8dc0a06a | 1160 | vmxferpagePacket = (struct vmtransfer_page_packet_header *)Packet; |
fceaf24a HJ |
1161 | |
1162 | if (vmxferpagePacket->TransferPageSetId != NETVSC_RECEIVE_BUFFER_ID) | |
1163 | { | |
1164 | DPRINT_ERR(NETVSC, "Invalid xfer page set id - expecting %x got %x", NETVSC_RECEIVE_BUFFER_ID, vmxferpagePacket->TransferPageSetId); | |
1165 | PutNetDevice(Device); | |
1166 | return; | |
1167 | } | |
1168 | ||
1169 | DPRINT_DBG(NETVSC, "xfer page - range count %d", vmxferpagePacket->RangeCount); | |
1170 | ||
1171 | INITIALIZE_LIST_HEAD(&listHead); | |
1172 | ||
454f18a9 BP |
1173 | /* |
1174 | * Grab free packets (range count + 1) to represent this xfer | |
1175 | * page packet. +1 to represent the xfer page packet itself. | |
1176 | * We grab it here so that we know exactly how many we can | |
1177 | * fulfil | |
1178 | */ | |
6436873a | 1179 | spin_lock_irqsave(&netDevice->receive_packet_list_lock, flags); |
fceaf24a HJ |
1180 | while (!IsListEmpty(&netDevice->ReceivePacketList)) |
1181 | { | |
1182 | entry = REMOVE_HEAD_LIST(&netDevice->ReceivePacketList); | |
4193d4f4 | 1183 | netvscPacket = CONTAINING_RECORD(entry, struct hv_netvsc_packet, ListEntry); |
fceaf24a HJ |
1184 | |
1185 | INSERT_TAIL_LIST(&listHead, &netvscPacket->ListEntry); | |
1186 | ||
1187 | if (++count == vmxferpagePacket->RangeCount + 1) | |
1188 | break; | |
1189 | } | |
6436873a | 1190 | spin_unlock_irqrestore(&netDevice->receive_packet_list_lock, flags); |
fceaf24a | 1191 | |
454f18a9 BP |
1192 | /* |
1193 | * We need at least 2 netvsc pkts (1 to represent the xfer | |
1194 | * page and at least 1 for the range) i.e. we can handled | |
1195 | * some of the xfer page packet ranges... | |
1196 | */ | |
fceaf24a HJ |
1197 | if (count < 2) |
1198 | { | |
1199 | DPRINT_ERR(NETVSC, "Got only %d netvsc pkt...needed %d pkts. Dropping this xfer page packet completely!", count, vmxferpagePacket->RangeCount+1); | |
1200 | ||
454f18a9 | 1201 | /* Return it to the freelist */ |
6436873a | 1202 | spin_lock_irqsave(&netDevice->receive_packet_list_lock, flags); |
fceaf24a HJ |
1203 | for (i=count; i != 0; i--) |
1204 | { | |
1205 | entry = REMOVE_HEAD_LIST(&listHead); | |
4193d4f4 | 1206 | netvscPacket = CONTAINING_RECORD(entry, struct hv_netvsc_packet, ListEntry); |
fceaf24a HJ |
1207 | |
1208 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &netvscPacket->ListEntry); | |
1209 | } | |
6436873a | 1210 | spin_unlock_irqrestore(&netDevice->receive_packet_list_lock, flags); |
fceaf24a HJ |
1211 | |
1212 | NetVscSendReceiveCompletion(Device, vmxferpagePacket->d.TransactionId); | |
1213 | ||
1214 | PutNetDevice(Device); | |
1215 | return; | |
1216 | } | |
1217 | ||
454f18a9 | 1218 | /* Remove the 1st packet to represent the xfer page packet itself */ |
fceaf24a | 1219 | entry = REMOVE_HEAD_LIST(&listHead); |
7e23a6e9 | 1220 | xferpagePacket = CONTAINING_RECORD(entry, struct xferpage_packet, ListEntry); |
454f18a9 | 1221 | xferpagePacket->Count = count - 1; /* This is how much we can satisfy */ |
fceaf24a HJ |
1222 | ASSERT(xferpagePacket->Count > 0 && xferpagePacket->Count <= vmxferpagePacket->RangeCount); |
1223 | ||
1224 | if (xferpagePacket->Count != vmxferpagePacket->RangeCount) | |
1225 | { | |
1226 | DPRINT_INFO(NETVSC, "Needed %d netvsc pkts to satisy this xfer page...got %d", vmxferpagePacket->RangeCount, xferpagePacket->Count); | |
1227 | } | |
1228 | ||
454f18a9 | 1229 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
fceaf24a HJ |
1230 | for (i=0; i < (count - 1); i++) |
1231 | { | |
1232 | entry = REMOVE_HEAD_LIST(&listHead); | |
4193d4f4 | 1233 | netvscPacket = CONTAINING_RECORD(entry, struct hv_netvsc_packet, ListEntry); |
fceaf24a | 1234 | |
454f18a9 | 1235 | /* Initialize the netvsc packet */ |
fceaf24a HJ |
1236 | netvscPacket->XferPagePacket = xferpagePacket; |
1237 | netvscPacket->Completion.Recv.OnReceiveCompletion = NetVscOnReceiveCompletion; | |
1238 | netvscPacket->Completion.Recv.ReceiveCompletionContext = netvscPacket; | |
1239 | netvscPacket->Device = Device; | |
454f18a9 | 1240 | netvscPacket->Completion.Recv.ReceiveCompletionTid = vmxferpagePacket->d.TransactionId; /* Save this so that we can send it back */ |
fceaf24a HJ |
1241 | |
1242 | netvscPacket->TotalDataBufferLength = vmxferpagePacket->Ranges[i].ByteCount; | |
1243 | netvscPacket->PageBufferCount = 1; | |
1244 | ||
1245 | ASSERT(vmxferpagePacket->Ranges[i].ByteOffset + vmxferpagePacket->Ranges[i].ByteCount < netDevice->ReceiveBufferSize); | |
1246 | ||
1247 | netvscPacket->PageBuffers[0].Length = vmxferpagePacket->Ranges[i].ByteCount; | |
1248 | ||
fa56d361 | 1249 | start = virt_to_phys((void*)((unsigned long)netDevice->ReceiveBuffer + vmxferpagePacket->Ranges[i].ByteOffset)); |
fceaf24a HJ |
1250 | |
1251 | netvscPacket->PageBuffers[0].Pfn = start >> PAGE_SHIFT; | |
c4b0bc94 | 1252 | endVirtual = (unsigned long)netDevice->ReceiveBuffer |
fceaf24a HJ |
1253 | + vmxferpagePacket->Ranges[i].ByteOffset |
1254 | + vmxferpagePacket->Ranges[i].ByteCount -1; | |
fa56d361 | 1255 | end = virt_to_phys((void*)endVirtual); |
fceaf24a | 1256 | |
454f18a9 | 1257 | /* Calculate the page relative offset */ |
fceaf24a HJ |
1258 | netvscPacket->PageBuffers[0].Offset = vmxferpagePacket->Ranges[i].ByteOffset & (PAGE_SIZE -1); |
1259 | if ((end >> PAGE_SHIFT) != (start>>PAGE_SHIFT)) { | |
454f18a9 | 1260 | /* Handle frame across multiple pages: */ |
fceaf24a HJ |
1261 | netvscPacket->PageBuffers[0].Length = |
1262 | (netvscPacket->PageBuffers[0].Pfn <<PAGE_SHIFT) + PAGE_SIZE - start; | |
1263 | bytesRemain = netvscPacket->TotalDataBufferLength - netvscPacket->PageBuffers[0].Length; | |
1264 | for (j=1; j<NETVSC_PACKET_MAXPAGE; j++) { | |
1265 | netvscPacket->PageBuffers[j].Offset = 0; | |
1266 | if (bytesRemain <= PAGE_SIZE) { | |
1267 | netvscPacket->PageBuffers[j].Length = bytesRemain; | |
1268 | bytesRemain = 0; | |
1269 | } else { | |
1270 | netvscPacket->PageBuffers[j].Length = PAGE_SIZE; | |
1271 | bytesRemain -= PAGE_SIZE; | |
1272 | } | |
1273 | netvscPacket->PageBuffers[j].Pfn = | |
fa56d361 | 1274 | virt_to_phys((void*)(endVirtual - bytesRemain)) >> PAGE_SHIFT; |
fceaf24a HJ |
1275 | netvscPacket->PageBufferCount++; |
1276 | if (bytesRemain == 0) | |
1277 | break; | |
1278 | } | |
1279 | ASSERT(bytesRemain == 0); | |
1280 | } | |
1281 | DPRINT_DBG(NETVSC, "[%d] - (abs offset %u len %u) => (pfn %llx, offset %u, len %u)", | |
1282 | i, | |
1283 | vmxferpagePacket->Ranges[i].ByteOffset, | |
1284 | vmxferpagePacket->Ranges[i].ByteCount, | |
1285 | netvscPacket->PageBuffers[0].Pfn, | |
1286 | netvscPacket->PageBuffers[0].Offset, | |
1287 | netvscPacket->PageBuffers[0].Length); | |
1288 | ||
454f18a9 | 1289 | /* Pass it to the upper layer */ |
7e23a6e9 | 1290 | ((struct netvsc_driver *)Device->Driver)->OnReceiveCallback(Device, netvscPacket); |
fceaf24a HJ |
1291 | |
1292 | NetVscOnReceiveCompletion(netvscPacket->Completion.Recv.ReceiveCompletionContext); | |
1293 | } | |
1294 | ||
1295 | ASSERT(IsListEmpty(&listHead)); | |
1296 | ||
1297 | PutNetDevice(Device); | |
1298 | DPRINT_EXIT(NETVSC); | |
1299 | } | |
1300 | ||
1301 | ||
1302 | static void | |
1303 | NetVscSendReceiveCompletion( | |
3d3b5518 | 1304 | struct hv_device *Device, |
59471438 | 1305 | u64 TransactionId |
fceaf24a HJ |
1306 | ) |
1307 | { | |
223c1aa6 | 1308 | struct nvsp_message recvcompMessage; |
fceaf24a HJ |
1309 | int retries=0; |
1310 | int ret=0; | |
1311 | ||
1312 | DPRINT_DBG(NETVSC, "Sending receive completion pkt - %llx", TransactionId); | |
1313 | ||
1314 | recvcompMessage.Header.MessageType = NvspMessage1TypeSendRNDISPacketComplete; | |
1315 | ||
454f18a9 | 1316 | /* FIXME: Pass in the status */ |
fceaf24a HJ |
1317 | recvcompMessage.Messages.Version1Messages.SendRNDISPacketComplete.Status = NvspStatusSuccess; |
1318 | ||
1319 | retry_send_cmplt: | |
454f18a9 | 1320 | /* Send the completion */ |
fceaf24a HJ |
1321 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
1322 | &recvcompMessage, | |
223c1aa6 | 1323 | sizeof(struct nvsp_message), |
fceaf24a HJ |
1324 | TransactionId, |
1325 | VmbusPacketTypeCompletion, | |
1326 | 0); | |
454f18a9 | 1327 | if (ret == 0) /* success */ |
fceaf24a | 1328 | { |
454f18a9 | 1329 | /* no-op */ |
fceaf24a | 1330 | } |
454f18a9 | 1331 | else if (ret == -1) /* no more room...wait a bit and attempt to retry 3 times */ |
fceaf24a HJ |
1332 | { |
1333 | retries++; | |
1334 | DPRINT_ERR(NETVSC, "unable to send receive completion pkt (tid %llx)...retrying %d", TransactionId, retries); | |
1335 | ||
1336 | if (retries < 4) | |
1337 | { | |
b4362c9c | 1338 | udelay(100); |
fceaf24a HJ |
1339 | goto retry_send_cmplt; |
1340 | } | |
1341 | else | |
1342 | { | |
1343 | DPRINT_ERR(NETVSC, "unable to send receive completion pkt (tid %llx)...give up retrying", TransactionId); | |
1344 | } | |
1345 | } | |
1346 | else | |
1347 | { | |
1348 | DPRINT_ERR(NETVSC, "unable to send receive completion pkt - %llx", TransactionId); | |
1349 | } | |
1350 | } | |
1351 | ||
454f18a9 | 1352 | /* Send a receive completion packet to RNDIS device (ie NetVsp) */ |
fceaf24a HJ |
1353 | static void |
1354 | NetVscOnReceiveCompletion( | |
8282c400 | 1355 | void * Context) |
fceaf24a | 1356 | { |
4193d4f4 | 1357 | struct hv_netvsc_packet *packet = (struct hv_netvsc_packet*)Context; |
3d3b5518 | 1358 | struct hv_device *device = (struct hv_device*)packet->Device; |
d1af1db7 | 1359 | struct NETVSC_DEVICE *netDevice; |
59471438 | 1360 | u64 transactionId=0; |
0e727613 | 1361 | bool fSendReceiveComp = false; |
6436873a | 1362 | unsigned long flags; |
fceaf24a HJ |
1363 | |
1364 | DPRINT_ENTER(NETVSC); | |
1365 | ||
1366 | ASSERT(packet->XferPagePacket); | |
1367 | ||
454f18a9 BP |
1368 | /* Even though it seems logical to do a GetOutboundNetDevice() here to send out receive completion, */ |
1369 | /* we are using GetInboundNetDevice() since we may have disable outbound traffic already. */ | |
fceaf24a HJ |
1370 | netDevice = GetInboundNetDevice(device); |
1371 | if (!netDevice) | |
1372 | { | |
1373 | DPRINT_ERR(NETVSC, "unable to get net device...device being destroyed?"); | |
1374 | DPRINT_EXIT(NETVSC); | |
1375 | return; | |
1376 | } | |
1377 | ||
454f18a9 | 1378 | /* Overloading use of the lock. */ |
6436873a | 1379 | spin_lock_irqsave(&netDevice->receive_packet_list_lock, flags); |
fceaf24a HJ |
1380 | |
1381 | ASSERT(packet->XferPagePacket->Count > 0); | |
1382 | packet->XferPagePacket->Count--; | |
1383 | ||
454f18a9 BP |
1384 | /* Last one in the line that represent 1 xfer page packet. */ |
1385 | /* Return the xfer page packet itself to the freelist */ | |
fceaf24a HJ |
1386 | if (packet->XferPagePacket->Count == 0) |
1387 | { | |
0e727613 | 1388 | fSendReceiveComp = true; |
fceaf24a HJ |
1389 | transactionId = packet->Completion.Recv.ReceiveCompletionTid; |
1390 | ||
1391 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->XferPagePacket->ListEntry); | |
1392 | } | |
1393 | ||
454f18a9 | 1394 | /* Put the packet back */ |
fceaf24a | 1395 | INSERT_TAIL_LIST(&netDevice->ReceivePacketList, &packet->ListEntry); |
6436873a | 1396 | spin_unlock_irqrestore(&netDevice->receive_packet_list_lock, flags); |
fceaf24a | 1397 | |
454f18a9 | 1398 | /* Send a receive completion for the xfer page packet */ |
fceaf24a HJ |
1399 | if (fSendReceiveComp) |
1400 | { | |
1401 | NetVscSendReceiveCompletion(device, transactionId); | |
1402 | } | |
1403 | ||
1404 | PutNetDevice(device); | |
1405 | DPRINT_EXIT(NETVSC); | |
1406 | } | |
1407 | ||
1408 | ||
1409 | ||
1410 | void | |
1411 | NetVscOnChannelCallback( | |
8282c400 | 1412 | void * Context |
fceaf24a HJ |
1413 | ) |
1414 | { | |
1415 | const int netPacketSize=2048; | |
1416 | int ret=0; | |
3d3b5518 | 1417 | struct hv_device *device=(struct hv_device*)Context; |
d1af1db7 | 1418 | struct NETVSC_DEVICE *netDevice; |
fceaf24a | 1419 | |
4d643114 | 1420 | u32 bytesRecvd; |
59471438 GKH |
1421 | u64 requestId; |
1422 | unsigned char packet[netPacketSize]; | |
8dc0a06a | 1423 | struct vmpacket_descriptor *desc; |
59471438 | 1424 | unsigned char *buffer=packet; |
fceaf24a HJ |
1425 | int bufferlen=netPacketSize; |
1426 | ||
1427 | ||
1428 | DPRINT_ENTER(NETVSC); | |
1429 | ||
1430 | ASSERT(device); | |
1431 | ||
1432 | netDevice = GetInboundNetDevice(device); | |
1433 | if (!netDevice) | |
1434 | { | |
1435 | DPRINT_ERR(NETVSC, "net device (%p) shutting down...ignoring inbound packets", netDevice); | |
1436 | DPRINT_EXIT(NETVSC); | |
1437 | return; | |
1438 | } | |
1439 | ||
1440 | do | |
1441 | { | |
1442 | ret = device->Driver->VmbusChannelInterface.RecvPacketRaw(device, | |
1443 | buffer, | |
1444 | bufferlen, | |
1445 | &bytesRecvd, | |
1446 | &requestId); | |
1447 | ||
1448 | if (ret == 0) | |
1449 | { | |
1450 | if (bytesRecvd > 0) | |
1451 | { | |
1452 | DPRINT_DBG(NETVSC, "receive %d bytes, tid %llx", bytesRecvd, requestId); | |
1453 | ||
8dc0a06a | 1454 | desc = (struct vmpacket_descriptor*)buffer; |
fceaf24a HJ |
1455 | switch (desc->Type) |
1456 | { | |
1457 | case VmbusPacketTypeCompletion: | |
1458 | NetVscOnSendCompletion(device, desc); | |
1459 | break; | |
1460 | ||
1461 | case VmbusPacketTypeDataUsingTransferPages: | |
1462 | NetVscOnReceive(device, desc); | |
1463 | break; | |
1464 | ||
1465 | default: | |
1466 | DPRINT_ERR(NETVSC, "unhandled packet type %d, tid %llx len %d\n", desc->Type, requestId, bytesRecvd); | |
1467 | break; | |
1468 | } | |
1469 | ||
454f18a9 | 1470 | /* reset */ |
fceaf24a HJ |
1471 | if (bufferlen > netPacketSize) |
1472 | { | |
8c69f52a | 1473 | kfree(buffer); |
fceaf24a HJ |
1474 | |
1475 | buffer = packet; | |
1476 | bufferlen = netPacketSize; | |
1477 | } | |
1478 | } | |
1479 | else | |
1480 | { | |
454f18a9 | 1481 | /* DPRINT_DBG(NETVSC, "nothing else to read..."); */ |
fceaf24a | 1482 | |
454f18a9 | 1483 | /* reset */ |
fceaf24a HJ |
1484 | if (bufferlen > netPacketSize) |
1485 | { | |
8c69f52a | 1486 | kfree(buffer); |
fceaf24a HJ |
1487 | |
1488 | buffer = packet; | |
1489 | bufferlen = netPacketSize; | |
1490 | } | |
1491 | ||
1492 | break; | |
1493 | } | |
1494 | } | |
454f18a9 | 1495 | else if (ret == -2) /* Handle large packet */ |
fceaf24a | 1496 | { |
0a72f3cf | 1497 | buffer = kmalloc(bytesRecvd, GFP_ATOMIC); |
fceaf24a HJ |
1498 | if (buffer == NULL) |
1499 | { | |
454f18a9 | 1500 | /* Try again next time around */ |
fceaf24a HJ |
1501 | DPRINT_ERR(NETVSC, "unable to allocate buffer of size (%d)!!", bytesRecvd); |
1502 | break; | |
1503 | } | |
1504 | ||
1505 | bufferlen = bytesRecvd; | |
1506 | } | |
1507 | else | |
1508 | { | |
1509 | ASSERT(0); | |
1510 | } | |
1511 | } while (1); | |
1512 | ||
1513 | PutNetDevice(device); | |
1514 | DPRINT_EXIT(NETVSC); | |
1515 | return; | |
1516 | } |