Commit | Line | Data |
---|---|---|
fceaf24a | 1 | /* |
fceaf24a HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
15 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
16 | * | |
17 | * Authors: | |
18 | * Hank Janssen <hjanssen@microsoft.com> | |
fceaf24a | 19 | */ |
5654e932 | 20 | #include <linux/kernel.h> |
0ffa63b0 | 21 | #include <linux/mm.h> |
b4362c9c | 22 | #include <linux/delay.h> |
21a80820 | 23 | #include <linux/io.h> |
4983b39a | 24 | #include "osd.h" |
645954c5 | 25 | #include "logging.h" |
fceaf24a HJ |
26 | #include "NetVsc.h" |
27 | #include "RndisFilter.h" | |
28 | ||
29 | ||
454f18a9 | 30 | /* Globals */ |
21a80820 | 31 | static const char *gDriverName = "netvsc"; |
fceaf24a | 32 | |
454f18a9 | 33 | /* {F8615163-DF3E-46c5-913F-F2D2F965ED0E} */ |
caf26a31 GKH |
34 | static const struct hv_guid gNetVscDeviceType = { |
35 | .data = { | |
36 | 0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46, | |
37 | 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E | |
38 | } | |
fceaf24a HJ |
39 | }; |
40 | ||
21a80820 GKH |
41 | static int NetVscOnDeviceAdd(struct hv_device *Device, void *AdditionalInfo); |
42 | ||
43 | static int NetVscOnDeviceRemove(struct hv_device *Device); | |
44 | ||
45 | static void NetVscOnCleanup(struct hv_driver *Driver); | |
46 | ||
47 | static void NetVscOnChannelCallback(void *context); | |
48 | ||
49 | static int NetVscInitializeSendBufferWithNetVsp(struct hv_device *Device); | |
50 | ||
51 | static int NetVscInitializeReceiveBufferWithNetVsp(struct hv_device *Device); | |
52 | ||
ce9ea4cf | 53 | static int NetVscDestroySendBuffer(struct netvsc_device *NetDevice); |
21a80820 | 54 | |
ce9ea4cf | 55 | static int NetVscDestroyReceiveBuffer(struct netvsc_device *NetDevice); |
21a80820 GKH |
56 | |
57 | static int NetVscConnectToVsp(struct hv_device *Device); | |
58 | ||
59 | static void NetVscOnSendCompletion(struct hv_device *Device, | |
60 | struct vmpacket_descriptor *Packet); | |
61 | ||
62 | static int NetVscOnSend(struct hv_device *Device, | |
63 | struct hv_netvsc_packet *Packet); | |
64 | ||
65 | static void NetVscOnReceive(struct hv_device *Device, | |
66 | struct vmpacket_descriptor *Packet); | |
67 | ||
68 | static void NetVscOnReceiveCompletion(void *Context); | |
69 | ||
70 | static void NetVscSendReceiveCompletion(struct hv_device *Device, | |
71 | u64 TransactionId); | |
72 | ||
fceaf24a | 73 | |
ce9ea4cf | 74 | static struct netvsc_device *AllocNetDevice(struct hv_device *Device) |
fceaf24a | 75 | { |
ce9ea4cf | 76 | struct netvsc_device *netDevice; |
fceaf24a | 77 | |
ce9ea4cf | 78 | netDevice = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL); |
fceaf24a HJ |
79 | if (!netDevice) |
80 | return NULL; | |
81 | ||
454f18a9 | 82 | /* Set to 2 to allow both inbound and outbound traffic */ |
f4888417 | 83 | atomic_cmpxchg(&netDevice->RefCount, 0, 2); |
fceaf24a HJ |
84 | |
85 | netDevice->Device = Device; | |
86 | Device->Extension = netDevice; | |
87 | ||
88 | return netDevice; | |
89 | } | |
90 | ||
ce9ea4cf | 91 | static void FreeNetDevice(struct netvsc_device *Device) |
fceaf24a | 92 | { |
f4888417 | 93 | ASSERT(atomic_read(&Device->RefCount) == 0); |
fceaf24a | 94 | Device->Device->Extension = NULL; |
8c69f52a | 95 | kfree(Device); |
fceaf24a HJ |
96 | } |
97 | ||
98 | ||
454f18a9 | 99 | /* Get the net device object iff exists and its refcount > 1 */ |
ce9ea4cf | 100 | static struct netvsc_device *GetOutboundNetDevice(struct hv_device *Device) |
fceaf24a | 101 | { |
ce9ea4cf | 102 | struct netvsc_device *netDevice; |
fceaf24a | 103 | |
21a80820 | 104 | netDevice = Device->Extension; |
f4888417 BP |
105 | if (netDevice && atomic_read(&netDevice->RefCount) > 1) |
106 | atomic_inc(&netDevice->RefCount); | |
fceaf24a | 107 | else |
fceaf24a | 108 | netDevice = NULL; |
fceaf24a HJ |
109 | |
110 | return netDevice; | |
111 | } | |
112 | ||
454f18a9 | 113 | /* Get the net device object iff exists and its refcount > 0 */ |
ce9ea4cf | 114 | static struct netvsc_device *GetInboundNetDevice(struct hv_device *Device) |
fceaf24a | 115 | { |
ce9ea4cf | 116 | struct netvsc_device *netDevice; |
fceaf24a | 117 | |
21a80820 | 118 | netDevice = Device->Extension; |
f4888417 BP |
119 | if (netDevice && atomic_read(&netDevice->RefCount)) |
120 | atomic_inc(&netDevice->RefCount); | |
fceaf24a | 121 | else |
fceaf24a | 122 | netDevice = NULL; |
fceaf24a HJ |
123 | |
124 | return netDevice; | |
125 | } | |
126 | ||
21a80820 | 127 | static void PutNetDevice(struct hv_device *Device) |
fceaf24a | 128 | { |
ce9ea4cf | 129 | struct netvsc_device *netDevice; |
fceaf24a | 130 | |
21a80820 | 131 | netDevice = Device->Extension; |
fceaf24a HJ |
132 | ASSERT(netDevice); |
133 | ||
f4888417 | 134 | atomic_dec(&netDevice->RefCount); |
fceaf24a HJ |
135 | } |
136 | ||
ce9ea4cf | 137 | static struct netvsc_device *ReleaseOutboundNetDevice(struct hv_device *Device) |
fceaf24a | 138 | { |
ce9ea4cf | 139 | struct netvsc_device *netDevice; |
fceaf24a | 140 | |
21a80820 | 141 | netDevice = Device->Extension; |
fceaf24a HJ |
142 | if (netDevice == NULL) |
143 | return NULL; | |
144 | ||
454f18a9 | 145 | /* Busy wait until the ref drop to 2, then set it to 1 */ |
f4888417 | 146 | while (atomic_cmpxchg(&netDevice->RefCount, 2, 1) != 2) |
b4362c9c | 147 | udelay(100); |
fceaf24a HJ |
148 | |
149 | return netDevice; | |
150 | } | |
151 | ||
ce9ea4cf | 152 | static struct netvsc_device *ReleaseInboundNetDevice(struct hv_device *Device) |
fceaf24a | 153 | { |
ce9ea4cf | 154 | struct netvsc_device *netDevice; |
fceaf24a | 155 | |
21a80820 | 156 | netDevice = Device->Extension; |
fceaf24a HJ |
157 | if (netDevice == NULL) |
158 | return NULL; | |
159 | ||
454f18a9 | 160 | /* Busy wait until the ref drop to 1, then set it to 0 */ |
f4888417 | 161 | while (atomic_cmpxchg(&netDevice->RefCount, 1, 0) != 1) |
b4362c9c | 162 | udelay(100); |
fceaf24a HJ |
163 | |
164 | Device->Extension = NULL; | |
165 | return netDevice; | |
166 | } | |
167 | ||
21a80820 GKH |
168 | /** |
169 | * NetVscInitialize - Main entry point | |
170 | */ | |
171 | int NetVscInitialize(struct hv_driver *drv) | |
fceaf24a | 172 | { |
7e23a6e9 | 173 | struct netvsc_driver *driver = (struct netvsc_driver *)drv; |
fceaf24a HJ |
174 | |
175 | DPRINT_ENTER(NETVSC); | |
176 | ||
21a80820 GKH |
177 | DPRINT_DBG(NETVSC, "sizeof(struct hv_netvsc_packet)=%zd, " |
178 | "sizeof(struct nvsp_message)=%zd, " | |
179 | "sizeof(struct vmtransfer_page_packet_header)=%zd", | |
180 | sizeof(struct hv_netvsc_packet), | |
181 | sizeof(struct nvsp_message), | |
182 | sizeof(struct vmtransfer_page_packet_header)); | |
fceaf24a | 183 | |
454f18a9 | 184 | /* Make sure we are at least 2 pages since 1 page is used for control */ |
fceaf24a HJ |
185 | ASSERT(driver->RingBufferSize >= (PAGE_SIZE << 1)); |
186 | ||
187 | drv->name = gDriverName; | |
caf26a31 | 188 | memcpy(&drv->deviceType, &gNetVscDeviceType, sizeof(struct hv_guid)); |
fceaf24a | 189 | |
454f18a9 | 190 | /* Make sure it is set by the caller */ |
fceaf24a HJ |
191 | ASSERT(driver->OnReceiveCallback); |
192 | ASSERT(driver->OnLinkStatusChanged); | |
193 | ||
454f18a9 | 194 | /* Setup the dispatch table */ |
21a80820 GKH |
195 | driver->Base.OnDeviceAdd = NetVscOnDeviceAdd; |
196 | driver->Base.OnDeviceRemove = NetVscOnDeviceRemove; | |
197 | driver->Base.OnCleanup = NetVscOnCleanup; | |
fceaf24a | 198 | |
21a80820 | 199 | driver->OnSend = NetVscOnSend; |
fceaf24a HJ |
200 | |
201 | RndisFilterInit(driver); | |
202 | ||
203 | DPRINT_EXIT(NETVSC); | |
204 | ||
21a80820 | 205 | return 0; |
fceaf24a HJ |
206 | } |
207 | ||
21a80820 | 208 | static int NetVscInitializeReceiveBufferWithNetVsp(struct hv_device *Device) |
fceaf24a | 209 | { |
21a80820 | 210 | int ret = 0; |
ce9ea4cf | 211 | struct netvsc_device *netDevice; |
223c1aa6 | 212 | struct nvsp_message *initPacket; |
fceaf24a HJ |
213 | |
214 | DPRINT_ENTER(NETVSC); | |
215 | ||
216 | netDevice = GetOutboundNetDevice(Device); | |
21a80820 GKH |
217 | if (!netDevice) { |
218 | DPRINT_ERR(NETVSC, "unable to get net device..." | |
219 | "device being destroyed?"); | |
fceaf24a HJ |
220 | DPRINT_EXIT(NETVSC); |
221 | return -1; | |
222 | } | |
223 | ASSERT(netDevice->ReceiveBufferSize > 0); | |
21a80820 GKH |
224 | /* page-size grandularity */ |
225 | ASSERT((netDevice->ReceiveBufferSize & (PAGE_SIZE - 1)) == 0); | |
fceaf24a | 226 | |
21a80820 GKH |
227 | netDevice->ReceiveBuffer = |
228 | osd_PageAlloc(netDevice->ReceiveBufferSize >> PAGE_SHIFT); | |
229 | if (!netDevice->ReceiveBuffer) { | |
230 | DPRINT_ERR(NETVSC, | |
231 | "unable to allocate receive buffer of size %d", | |
232 | netDevice->ReceiveBufferSize); | |
fceaf24a HJ |
233 | ret = -1; |
234 | goto Cleanup; | |
235 | } | |
21a80820 GKH |
236 | /* page-aligned buffer */ |
237 | ASSERT(((unsigned long)netDevice->ReceiveBuffer & (PAGE_SIZE - 1)) == | |
238 | 0); | |
fceaf24a HJ |
239 | |
240 | DPRINT_INFO(NETVSC, "Establishing receive buffer's GPADL..."); | |
241 | ||
454f18a9 BP |
242 | /* |
243 | * Establish the gpadl handle for this buffer on this | |
244 | * channel. Note: This call uses the vmbus connection rather | |
245 | * than the channel to establish the gpadl handle. | |
246 | */ | |
fceaf24a | 247 | ret = Device->Driver->VmbusChannelInterface.EstablishGpadl(Device, |
21a80820 GKH |
248 | netDevice->ReceiveBuffer, |
249 | netDevice->ReceiveBufferSize, | |
250 | &netDevice->ReceiveBufferGpadlHandle); | |
251 | if (ret != 0) { | |
252 | DPRINT_ERR(NETVSC, | |
253 | "unable to establish receive buffer's gpadl"); | |
fceaf24a HJ |
254 | goto Cleanup; |
255 | } | |
256 | ||
bfc30aae | 257 | /* osd_WaitEventWait(ext->ChannelInitEvent); */ |
fceaf24a | 258 | |
454f18a9 | 259 | /* Notify the NetVsp of the gpadl handle */ |
fceaf24a HJ |
260 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendReceiveBuffer..."); |
261 | ||
262 | initPacket = &netDevice->ChannelInitPacket; | |
263 | ||
223c1aa6 | 264 | memset(initPacket, 0, sizeof(struct nvsp_message)); |
fceaf24a | 265 | |
21a80820 GKH |
266 | initPacket->Header.MessageType = NvspMessage1TypeSendReceiveBuffer; |
267 | initPacket->Messages.Version1Messages.SendReceiveBuffer.GpadlHandle = netDevice->ReceiveBufferGpadlHandle; | |
268 | initPacket->Messages.Version1Messages.SendReceiveBuffer.Id = NETVSC_RECEIVE_BUFFER_ID; | |
fceaf24a | 269 | |
454f18a9 | 270 | /* Send the gpadl notification request */ |
fceaf24a | 271 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
21a80820 GKH |
272 | initPacket, |
273 | sizeof(struct nvsp_message), | |
274 | (unsigned long)initPacket, | |
275 | VmbusPacketTypeDataInBand, | |
276 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
277 | if (ret != 0) { | |
278 | DPRINT_ERR(NETVSC, | |
279 | "unable to send receive buffer's gpadl to netvsp"); | |
fceaf24a HJ |
280 | goto Cleanup; |
281 | } | |
282 | ||
bfc30aae | 283 | osd_WaitEventWait(netDevice->ChannelInitEvent); |
fceaf24a | 284 | |
454f18a9 | 285 | /* Check the response */ |
21a80820 GKH |
286 | if (initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Status != NvspStatusSuccess) { |
287 | DPRINT_ERR(NETVSC, "Unable to complete receive buffer " | |
288 | "initialzation with NetVsp - status %d", | |
289 | initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Status); | |
fceaf24a HJ |
290 | ret = -1; |
291 | goto Cleanup; | |
292 | } | |
293 | ||
454f18a9 | 294 | /* Parse the response */ |
fceaf24a HJ |
295 | ASSERT(netDevice->ReceiveSectionCount == 0); |
296 | ASSERT(netDevice->ReceiveSections == NULL); | |
297 | ||
298 | netDevice->ReceiveSectionCount = initPacket->Messages.Version1Messages.SendReceiveBufferComplete.NumSections; | |
299 | ||
223c1aa6 | 300 | netDevice->ReceiveSections = kmalloc(netDevice->ReceiveSectionCount * sizeof(struct nvsp_1_receive_buffer_section), GFP_KERNEL); |
21a80820 | 301 | if (netDevice->ReceiveSections == NULL) { |
fceaf24a HJ |
302 | ret = -1; |
303 | goto Cleanup; | |
304 | } | |
305 | ||
306 | memcpy(netDevice->ReceiveSections, | |
307 | initPacket->Messages.Version1Messages.SendReceiveBufferComplete.Sections, | |
223c1aa6 | 308 | netDevice->ReceiveSectionCount * sizeof(struct nvsp_1_receive_buffer_section)); |
fceaf24a | 309 | |
21a80820 GKH |
310 | DPRINT_INFO(NETVSC, "Receive sections info (count %d, offset %d, " |
311 | "endoffset %d, suballoc size %d, num suballocs %d)", | |
312 | netDevice->ReceiveSectionCount, | |
313 | netDevice->ReceiveSections[0].Offset, | |
314 | netDevice->ReceiveSections[0].EndOffset, | |
315 | netDevice->ReceiveSections[0].SubAllocationSize, | |
316 | netDevice->ReceiveSections[0].NumSubAllocations); | |
fceaf24a | 317 | |
21a80820 GKH |
318 | /* |
319 | * For 1st release, there should only be 1 section that represents the | |
320 | * entire receive buffer | |
321 | */ | |
fceaf24a | 322 | if (netDevice->ReceiveSectionCount != 1 || |
21a80820 | 323 | netDevice->ReceiveSections->Offset != 0) { |
fceaf24a HJ |
324 | ret = -1; |
325 | goto Cleanup; | |
326 | } | |
327 | ||
328 | goto Exit; | |
329 | ||
330 | Cleanup: | |
331 | NetVscDestroyReceiveBuffer(netDevice); | |
332 | ||
333 | Exit: | |
334 | PutNetDevice(Device); | |
335 | DPRINT_EXIT(NETVSC); | |
336 | return ret; | |
337 | } | |
338 | ||
21a80820 | 339 | static int NetVscInitializeSendBufferWithNetVsp(struct hv_device *Device) |
fceaf24a | 340 | { |
21a80820 | 341 | int ret = 0; |
ce9ea4cf | 342 | struct netvsc_device *netDevice; |
223c1aa6 | 343 | struct nvsp_message *initPacket; |
fceaf24a HJ |
344 | |
345 | DPRINT_ENTER(NETVSC); | |
346 | ||
347 | netDevice = GetOutboundNetDevice(Device); | |
21a80820 GKH |
348 | if (!netDevice) { |
349 | DPRINT_ERR(NETVSC, "unable to get net device..." | |
350 | "device being destroyed?"); | |
fceaf24a HJ |
351 | DPRINT_EXIT(NETVSC); |
352 | return -1; | |
353 | } | |
354 | ASSERT(netDevice->SendBufferSize > 0); | |
21a80820 GKH |
355 | /* page-size grandularity */ |
356 | ASSERT((netDevice->SendBufferSize & (PAGE_SIZE - 1)) == 0); | |
357 | ||
358 | netDevice->SendBuffer = | |
359 | osd_PageAlloc(netDevice->SendBufferSize >> PAGE_SHIFT); | |
360 | if (!netDevice->SendBuffer) { | |
361 | DPRINT_ERR(NETVSC, "unable to allocate send buffer of size %d", | |
362 | netDevice->SendBufferSize); | |
fceaf24a HJ |
363 | ret = -1; |
364 | goto Cleanup; | |
365 | } | |
21a80820 GKH |
366 | /* page-aligned buffer */ |
367 | ASSERT(((unsigned long)netDevice->SendBuffer & (PAGE_SIZE - 1)) == 0); | |
fceaf24a HJ |
368 | |
369 | DPRINT_INFO(NETVSC, "Establishing send buffer's GPADL..."); | |
370 | ||
454f18a9 BP |
371 | /* |
372 | * Establish the gpadl handle for this buffer on this | |
373 | * channel. Note: This call uses the vmbus connection rather | |
374 | * than the channel to establish the gpadl handle. | |
375 | */ | |
fceaf24a | 376 | ret = Device->Driver->VmbusChannelInterface.EstablishGpadl(Device, |
21a80820 GKH |
377 | netDevice->SendBuffer, |
378 | netDevice->SendBufferSize, | |
379 | &netDevice->SendBufferGpadlHandle); | |
380 | if (ret != 0) { | |
fceaf24a HJ |
381 | DPRINT_ERR(NETVSC, "unable to establish send buffer's gpadl"); |
382 | goto Cleanup; | |
383 | } | |
384 | ||
bfc30aae | 385 | /* osd_WaitEventWait(ext->ChannelInitEvent); */ |
fceaf24a | 386 | |
454f18a9 | 387 | /* Notify the NetVsp of the gpadl handle */ |
fceaf24a HJ |
388 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendSendBuffer..."); |
389 | ||
390 | initPacket = &netDevice->ChannelInitPacket; | |
391 | ||
223c1aa6 | 392 | memset(initPacket, 0, sizeof(struct nvsp_message)); |
fceaf24a | 393 | |
21a80820 GKH |
394 | initPacket->Header.MessageType = NvspMessage1TypeSendSendBuffer; |
395 | initPacket->Messages.Version1Messages.SendReceiveBuffer.GpadlHandle = netDevice->SendBufferGpadlHandle; | |
396 | initPacket->Messages.Version1Messages.SendReceiveBuffer.Id = NETVSC_SEND_BUFFER_ID; | |
fceaf24a | 397 | |
454f18a9 | 398 | /* Send the gpadl notification request */ |
fceaf24a | 399 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
21a80820 GKH |
400 | initPacket, sizeof(struct nvsp_message), |
401 | (unsigned long)initPacket, | |
402 | VmbusPacketTypeDataInBand, | |
403 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
404 | if (ret != 0) { | |
405 | DPRINT_ERR(NETVSC, | |
406 | "unable to send receive buffer's gpadl to netvsp"); | |
fceaf24a HJ |
407 | goto Cleanup; |
408 | } | |
409 | ||
bfc30aae | 410 | osd_WaitEventWait(netDevice->ChannelInitEvent); |
fceaf24a | 411 | |
454f18a9 | 412 | /* Check the response */ |
21a80820 GKH |
413 | if (initPacket->Messages.Version1Messages.SendSendBufferComplete.Status != NvspStatusSuccess) { |
414 | DPRINT_ERR(NETVSC, "Unable to complete send buffer " | |
415 | "initialzation with NetVsp - status %d", | |
416 | initPacket->Messages.Version1Messages.SendSendBufferComplete.Status); | |
fceaf24a HJ |
417 | ret = -1; |
418 | goto Cleanup; | |
419 | } | |
420 | ||
421 | netDevice->SendSectionSize = initPacket->Messages.Version1Messages.SendSendBufferComplete.SectionSize; | |
422 | ||
423 | goto Exit; | |
424 | ||
425 | Cleanup: | |
426 | NetVscDestroySendBuffer(netDevice); | |
427 | ||
428 | Exit: | |
429 | PutNetDevice(Device); | |
430 | DPRINT_EXIT(NETVSC); | |
431 | return ret; | |
432 | } | |
433 | ||
ce9ea4cf | 434 | static int NetVscDestroyReceiveBuffer(struct netvsc_device *NetDevice) |
fceaf24a | 435 | { |
223c1aa6 | 436 | struct nvsp_message *revokePacket; |
21a80820 | 437 | int ret = 0; |
fceaf24a HJ |
438 | |
439 | DPRINT_ENTER(NETVSC); | |
440 | ||
454f18a9 BP |
441 | /* |
442 | * If we got a section count, it means we received a | |
443 | * SendReceiveBufferComplete msg (ie sent | |
444 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
445 | * to send a revoke msg here | |
446 | */ | |
21a80820 GKH |
447 | if (NetDevice->ReceiveSectionCount) { |
448 | DPRINT_INFO(NETVSC, | |
449 | "Sending NvspMessage1TypeRevokeReceiveBuffer..."); | |
fceaf24a | 450 | |
454f18a9 | 451 | /* Send the revoke receive buffer */ |
fceaf24a | 452 | revokePacket = &NetDevice->RevokePacket; |
223c1aa6 | 453 | memset(revokePacket, 0, sizeof(struct nvsp_message)); |
fceaf24a HJ |
454 | |
455 | revokePacket->Header.MessageType = NvspMessage1TypeRevokeReceiveBuffer; | |
456 | revokePacket->Messages.Version1Messages.RevokeReceiveBuffer.Id = NETVSC_RECEIVE_BUFFER_ID; | |
457 | ||
21a80820 GKH |
458 | ret = NetDevice->Device->Driver->VmbusChannelInterface.SendPacket( |
459 | NetDevice->Device, | |
460 | revokePacket, | |
461 | sizeof(struct nvsp_message), | |
462 | (unsigned long)revokePacket, | |
463 | VmbusPacketTypeDataInBand, 0); | |
454f18a9 BP |
464 | /* |
465 | * If we failed here, we might as well return and | |
466 | * have a leak rather than continue and a bugchk | |
467 | */ | |
21a80820 GKH |
468 | if (ret != 0) { |
469 | DPRINT_ERR(NETVSC, "unable to send revoke receive " | |
470 | "buffer to netvsp"); | |
fceaf24a HJ |
471 | DPRINT_EXIT(NETVSC); |
472 | return -1; | |
473 | } | |
474 | } | |
475 | ||
454f18a9 | 476 | /* Teardown the gpadl on the vsp end */ |
21a80820 | 477 | if (NetDevice->ReceiveBufferGpadlHandle) { |
fceaf24a HJ |
478 | DPRINT_INFO(NETVSC, "Tearing down receive buffer's GPADL..."); |
479 | ||
21a80820 GKH |
480 | ret = NetDevice->Device->Driver->VmbusChannelInterface.TeardownGpadl( |
481 | NetDevice->Device, | |
482 | NetDevice->ReceiveBufferGpadlHandle); | |
fceaf24a | 483 | |
454f18a9 | 484 | /* If we failed here, we might as well return and have a leak rather than continue and a bugchk */ |
21a80820 GKH |
485 | if (ret != 0) { |
486 | DPRINT_ERR(NETVSC, | |
487 | "unable to teardown receive buffer's gpadl"); | |
fceaf24a HJ |
488 | DPRINT_EXIT(NETVSC); |
489 | return -1; | |
490 | } | |
491 | NetDevice->ReceiveBufferGpadlHandle = 0; | |
492 | } | |
493 | ||
21a80820 | 494 | if (NetDevice->ReceiveBuffer) { |
fceaf24a HJ |
495 | DPRINT_INFO(NETVSC, "Freeing up receive buffer..."); |
496 | ||
454f18a9 | 497 | /* Free up the receive buffer */ |
21a80820 GKH |
498 | osd_PageFree(NetDevice->ReceiveBuffer, |
499 | NetDevice->ReceiveBufferSize >> PAGE_SHIFT); | |
fceaf24a HJ |
500 | NetDevice->ReceiveBuffer = NULL; |
501 | } | |
502 | ||
21a80820 GKH |
503 | if (NetDevice->ReceiveSections) { |
504 | NetDevice->ReceiveSectionCount = 0; | |
8c69f52a | 505 | kfree(NetDevice->ReceiveSections); |
fceaf24a | 506 | NetDevice->ReceiveSections = NULL; |
fceaf24a HJ |
507 | } |
508 | ||
509 | DPRINT_EXIT(NETVSC); | |
510 | ||
511 | return ret; | |
512 | } | |
513 | ||
ce9ea4cf | 514 | static int NetVscDestroySendBuffer(struct netvsc_device *NetDevice) |
fceaf24a | 515 | { |
223c1aa6 | 516 | struct nvsp_message *revokePacket; |
21a80820 | 517 | int ret = 0; |
fceaf24a HJ |
518 | |
519 | DPRINT_ENTER(NETVSC); | |
520 | ||
454f18a9 BP |
521 | /* |
522 | * If we got a section count, it means we received a | |
523 | * SendReceiveBufferComplete msg (ie sent | |
524 | * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need | |
525 | * to send a revoke msg here | |
526 | */ | |
21a80820 GKH |
527 | if (NetDevice->SendSectionSize) { |
528 | DPRINT_INFO(NETVSC, | |
529 | "Sending NvspMessage1TypeRevokeSendBuffer..."); | |
fceaf24a | 530 | |
454f18a9 | 531 | /* Send the revoke send buffer */ |
fceaf24a | 532 | revokePacket = &NetDevice->RevokePacket; |
223c1aa6 | 533 | memset(revokePacket, 0, sizeof(struct nvsp_message)); |
fceaf24a HJ |
534 | |
535 | revokePacket->Header.MessageType = NvspMessage1TypeRevokeSendBuffer; | |
536 | revokePacket->Messages.Version1Messages.RevokeSendBuffer.Id = NETVSC_SEND_BUFFER_ID; | |
537 | ||
538 | ret = NetDevice->Device->Driver->VmbusChannelInterface.SendPacket(NetDevice->Device, | |
21a80820 GKH |
539 | revokePacket, |
540 | sizeof(struct nvsp_message), | |
541 | (unsigned long)revokePacket, | |
542 | VmbusPacketTypeDataInBand, 0); | |
543 | /* | |
544 | * If we failed here, we might as well return and have a leak | |
545 | * rather than continue and a bugchk | |
546 | */ | |
547 | if (ret != 0) { | |
548 | DPRINT_ERR(NETVSC, "unable to send revoke send buffer " | |
549 | "to netvsp"); | |
fceaf24a HJ |
550 | DPRINT_EXIT(NETVSC); |
551 | return -1; | |
552 | } | |
553 | } | |
554 | ||
454f18a9 | 555 | /* Teardown the gpadl on the vsp end */ |
21a80820 | 556 | if (NetDevice->SendBufferGpadlHandle) { |
fceaf24a HJ |
557 | DPRINT_INFO(NETVSC, "Tearing down send buffer's GPADL..."); |
558 | ||
21a80820 | 559 | ret = NetDevice->Device->Driver->VmbusChannelInterface.TeardownGpadl(NetDevice->Device, NetDevice->SendBufferGpadlHandle); |
fceaf24a | 560 | |
21a80820 GKH |
561 | /* |
562 | * If we failed here, we might as well return and have a leak | |
563 | * rather than continue and a bugchk | |
564 | */ | |
565 | if (ret != 0) { | |
566 | DPRINT_ERR(NETVSC, "unable to teardown send buffer's " | |
567 | "gpadl"); | |
fceaf24a HJ |
568 | DPRINT_EXIT(NETVSC); |
569 | return -1; | |
570 | } | |
571 | NetDevice->SendBufferGpadlHandle = 0; | |
572 | } | |
573 | ||
21a80820 | 574 | if (NetDevice->SendBuffer) { |
fceaf24a HJ |
575 | DPRINT_INFO(NETVSC, "Freeing up send buffer..."); |
576 | ||
454f18a9 | 577 | /* Free up the receive buffer */ |
21a80820 GKH |
578 | osd_PageFree(NetDevice->SendBuffer, |
579 | NetDevice->SendBufferSize >> PAGE_SHIFT); | |
fceaf24a HJ |
580 | NetDevice->SendBuffer = NULL; |
581 | } | |
582 | ||
583 | DPRINT_EXIT(NETVSC); | |
584 | ||
585 | return ret; | |
586 | } | |
587 | ||
588 | ||
21a80820 | 589 | static int NetVscConnectToVsp(struct hv_device *Device) |
fceaf24a | 590 | { |
21a80820 | 591 | int ret; |
ce9ea4cf | 592 | struct netvsc_device *netDevice; |
223c1aa6 | 593 | struct nvsp_message *initPacket; |
fceaf24a HJ |
594 | int ndisVersion; |
595 | ||
596 | DPRINT_ENTER(NETVSC); | |
597 | ||
598 | netDevice = GetOutboundNetDevice(Device); | |
21a80820 GKH |
599 | if (!netDevice) { |
600 | DPRINT_ERR(NETVSC, "unable to get net device..." | |
601 | "device being destroyed?"); | |
fceaf24a HJ |
602 | DPRINT_EXIT(NETVSC); |
603 | return -1; | |
604 | } | |
605 | ||
606 | initPacket = &netDevice->ChannelInitPacket; | |
607 | ||
223c1aa6 | 608 | memset(initPacket, 0, sizeof(struct nvsp_message)); |
fceaf24a | 609 | initPacket->Header.MessageType = NvspMessageTypeInit; |
21a80820 GKH |
610 | initPacket->Messages.InitMessages.Init.MinProtocolVersion = NVSP_MIN_PROTOCOL_VERSION; |
611 | initPacket->Messages.InitMessages.Init.MaxProtocolVersion = NVSP_MAX_PROTOCOL_VERSION; | |
fceaf24a HJ |
612 | |
613 | DPRINT_INFO(NETVSC, "Sending NvspMessageTypeInit..."); | |
614 | ||
454f18a9 | 615 | /* Send the init request */ |
fceaf24a | 616 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
21a80820 GKH |
617 | initPacket, |
618 | sizeof(struct nvsp_message), | |
619 | (unsigned long)initPacket, | |
620 | VmbusPacketTypeDataInBand, | |
621 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
622 | ||
623 | if (ret != 0) { | |
fceaf24a HJ |
624 | DPRINT_ERR(NETVSC, "unable to send NvspMessageTypeInit"); |
625 | goto Cleanup; | |
626 | } | |
627 | ||
bfc30aae | 628 | osd_WaitEventWait(netDevice->ChannelInitEvent); |
fceaf24a | 629 | |
454f18a9 BP |
630 | /* Now, check the response */ |
631 | /* ASSERT(initPacket->Messages.InitMessages.InitComplete.MaximumMdlChainLength <= MAX_MULTIPAGE_BUFFER_COUNT); */ | |
fceaf24a HJ |
632 | DPRINT_INFO(NETVSC, "NvspMessageTypeInit status(%d) max mdl chain (%d)", |
633 | initPacket->Messages.InitMessages.InitComplete.Status, | |
634 | initPacket->Messages.InitMessages.InitComplete.MaximumMdlChainLength); | |
635 | ||
21a80820 GKH |
636 | if (initPacket->Messages.InitMessages.InitComplete.Status != |
637 | NvspStatusSuccess) { | |
638 | DPRINT_ERR(NETVSC, | |
639 | "unable to initialize with netvsp (status 0x%x)", | |
640 | initPacket->Messages.InitMessages.InitComplete.Status); | |
fceaf24a HJ |
641 | ret = -1; |
642 | goto Cleanup; | |
643 | } | |
644 | ||
21a80820 GKH |
645 | if (initPacket->Messages.InitMessages.InitComplete.NegotiatedProtocolVersion != NVSP_PROTOCOL_VERSION_1) { |
646 | DPRINT_ERR(NETVSC, "unable to initialize with netvsp " | |
647 | "(version expected 1 got %d)", | |
648 | initPacket->Messages.InitMessages.InitComplete.NegotiatedProtocolVersion); | |
fceaf24a HJ |
649 | ret = -1; |
650 | goto Cleanup; | |
651 | } | |
652 | DPRINT_INFO(NETVSC, "Sending NvspMessage1TypeSendNdisVersion..."); | |
653 | ||
454f18a9 | 654 | /* Send the ndis version */ |
223c1aa6 | 655 | memset(initPacket, 0, sizeof(struct nvsp_message)); |
fceaf24a | 656 | |
21a80820 | 657 | ndisVersion = 0x00050000; |
fceaf24a | 658 | |
21a80820 GKH |
659 | initPacket->Header.MessageType = NvspMessage1TypeSendNdisVersion; |
660 | initPacket->Messages.Version1Messages.SendNdisVersion.NdisMajorVersion = | |
661 | (ndisVersion & 0xFFFF0000) >> 16; | |
662 | initPacket->Messages.Version1Messages.SendNdisVersion.NdisMinorVersion = | |
663 | ndisVersion & 0xFFFF; | |
fceaf24a | 664 | |
454f18a9 | 665 | /* Send the init request */ |
fceaf24a | 666 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
21a80820 GKH |
667 | initPacket, |
668 | sizeof(struct nvsp_message), | |
669 | (unsigned long)initPacket, | |
670 | VmbusPacketTypeDataInBand, 0); | |
671 | if (ret != 0) { | |
672 | DPRINT_ERR(NETVSC, | |
673 | "unable to send NvspMessage1TypeSendNdisVersion"); | |
fceaf24a HJ |
674 | ret = -1; |
675 | goto Cleanup; | |
676 | } | |
454f18a9 BP |
677 | /* |
678 | * BUGBUG - We have to wait for the above msg since the | |
679 | * netvsp uses KMCL which acknowledges packet (completion | |
680 | * packet) since our Vmbus always set the | |
681 | * VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED flag | |
682 | */ | |
bfc30aae | 683 | /* osd_WaitEventWait(NetVscChannel->ChannelInitEvent); */ |
454f18a9 BP |
684 | |
685 | /* Post the big receive buffer to NetVSP */ | |
fceaf24a HJ |
686 | ret = NetVscInitializeReceiveBufferWithNetVsp(Device); |
687 | if (ret == 0) | |
fceaf24a | 688 | ret = NetVscInitializeSendBufferWithNetVsp(Device); |
fceaf24a HJ |
689 | |
690 | Cleanup: | |
691 | PutNetDevice(Device); | |
692 | DPRINT_EXIT(NETVSC); | |
693 | return ret; | |
694 | } | |
695 | ||
ce9ea4cf | 696 | static void NetVscDisconnectFromVsp(struct netvsc_device *NetDevice) |
fceaf24a HJ |
697 | { |
698 | DPRINT_ENTER(NETVSC); | |
699 | ||
700 | NetVscDestroyReceiveBuffer(NetDevice); | |
701 | NetVscDestroySendBuffer(NetDevice); | |
702 | ||
703 | DPRINT_EXIT(NETVSC); | |
704 | } | |
705 | ||
21a80820 GKH |
706 | /** |
707 | * NetVscOnDeviceAdd - Callback when the device belonging to this driver is added | |
708 | */ | |
709 | static int NetVscOnDeviceAdd(struct hv_device *Device, void *AdditionalInfo) | |
fceaf24a | 710 | { |
21a80820 | 711 | int ret = 0; |
fceaf24a | 712 | int i; |
ce9ea4cf | 713 | struct netvsc_device *netDevice; |
d29274ef | 714 | struct hv_netvsc_packet *packet, *pos; |
21a80820 GKH |
715 | struct netvsc_driver *netDriver = |
716 | (struct netvsc_driver *)Device->Driver; | |
fceaf24a HJ |
717 | |
718 | DPRINT_ENTER(NETVSC); | |
719 | ||
720 | netDevice = AllocNetDevice(Device); | |
21a80820 | 721 | if (!netDevice) { |
fceaf24a HJ |
722 | ret = -1; |
723 | goto Cleanup; | |
724 | } | |
725 | ||
726 | DPRINT_DBG(NETVSC, "netvsc channel object allocated - %p", netDevice); | |
727 | ||
454f18a9 | 728 | /* Initialize the NetVSC channel extension */ |
fceaf24a | 729 | netDevice->ReceiveBufferSize = NETVSC_RECEIVE_BUFFER_SIZE; |
6436873a | 730 | spin_lock_init(&netDevice->receive_packet_list_lock); |
fceaf24a HJ |
731 | |
732 | netDevice->SendBufferSize = NETVSC_SEND_BUFFER_SIZE; | |
733 | ||
d29274ef | 734 | INIT_LIST_HEAD(&netDevice->ReceivePacketList); |
fceaf24a | 735 | |
21a80820 GKH |
736 | for (i = 0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++) { |
737 | packet = kzalloc(sizeof(struct hv_netvsc_packet) + | |
738 | (NETVSC_RECEIVE_SG_COUNT * | |
739 | sizeof(struct hv_page_buffer)), GFP_KERNEL); | |
740 | if (!packet) { | |
741 | DPRINT_DBG(NETVSC, "unable to allocate netvsc pkts " | |
742 | "for receive pool (wanted %d got %d)", | |
743 | NETVSC_RECEIVE_PACKETLIST_COUNT, i); | |
fceaf24a HJ |
744 | break; |
745 | } | |
d29274ef BP |
746 | list_add_tail(&packet->ListEntry, |
747 | &netDevice->ReceivePacketList); | |
fceaf24a | 748 | } |
bfc30aae | 749 | netDevice->ChannelInitEvent = osd_WaitEventCreate(); |
fceaf24a | 750 | |
454f18a9 | 751 | /* Open the channel */ |
fceaf24a | 752 | ret = Device->Driver->VmbusChannelInterface.Open(Device, |
21a80820 GKH |
753 | netDriver->RingBufferSize, |
754 | netDriver->RingBufferSize, | |
755 | NULL, 0, | |
756 | NetVscOnChannelCallback, | |
757 | Device); | |
fceaf24a | 758 | |
21a80820 | 759 | if (ret != 0) { |
fceaf24a HJ |
760 | DPRINT_ERR(NETVSC, "unable to open channel: %d", ret); |
761 | ret = -1; | |
762 | goto Cleanup; | |
763 | } | |
764 | ||
454f18a9 | 765 | /* Channel is opened */ |
fceaf24a HJ |
766 | DPRINT_INFO(NETVSC, "*** NetVSC channel opened successfully! ***"); |
767 | ||
454f18a9 | 768 | /* Connect with the NetVsp */ |
fceaf24a | 769 | ret = NetVscConnectToVsp(Device); |
21a80820 | 770 | if (ret != 0) { |
fceaf24a HJ |
771 | DPRINT_ERR(NETVSC, "unable to connect to NetVSP - %d", ret); |
772 | ret = -1; | |
773 | goto Close; | |
774 | } | |
775 | ||
21a80820 GKH |
776 | DPRINT_INFO(NETVSC, "*** NetVSC channel handshake result - %d ***", |
777 | ret); | |
fceaf24a HJ |
778 | |
779 | DPRINT_EXIT(NETVSC); | |
780 | return ret; | |
781 | ||
782 | Close: | |
454f18a9 | 783 | /* Now, we can close the channel safely */ |
fceaf24a HJ |
784 | Device->Driver->VmbusChannelInterface.Close(Device); |
785 | ||
786 | Cleanup: | |
787 | ||
21a80820 | 788 | if (netDevice) { |
420beac4 | 789 | kfree(netDevice->ChannelInitEvent); |
fceaf24a | 790 | |
d29274ef BP |
791 | list_for_each_entry_safe(packet, pos, |
792 | &netDevice->ReceivePacketList, | |
793 | ListEntry) { | |
794 | list_del(&packet->ListEntry); | |
8c69f52a | 795 | kfree(packet); |
fceaf24a HJ |
796 | } |
797 | ||
fceaf24a HJ |
798 | ReleaseOutboundNetDevice(Device); |
799 | ReleaseInboundNetDevice(Device); | |
800 | ||
801 | FreeNetDevice(netDevice); | |
802 | } | |
803 | ||
804 | DPRINT_EXIT(NETVSC); | |
805 | return ret; | |
806 | } | |
807 | ||
21a80820 GKH |
808 | /** |
809 | * NetVscOnDeviceRemove - Callback when the root bus device is removed | |
810 | */ | |
811 | static int NetVscOnDeviceRemove(struct hv_device *Device) | |
fceaf24a | 812 | { |
ce9ea4cf | 813 | struct netvsc_device *netDevice; |
d29274ef | 814 | struct hv_netvsc_packet *netvscPacket, *pos; |
fceaf24a HJ |
815 | |
816 | DPRINT_ENTER(NETVSC); | |
817 | ||
21a80820 GKH |
818 | DPRINT_INFO(NETVSC, "Disabling outbound traffic on net device (%p)...", |
819 | Device->Extension); | |
fceaf24a | 820 | |
454f18a9 | 821 | /* Stop outbound traffic ie sends and receives completions */ |
fceaf24a | 822 | netDevice = ReleaseOutboundNetDevice(Device); |
21a80820 | 823 | if (!netDevice) { |
fceaf24a HJ |
824 | DPRINT_ERR(NETVSC, "No net device present!!"); |
825 | return -1; | |
826 | } | |
827 | ||
454f18a9 | 828 | /* Wait for all send completions */ |
21a80820 GKH |
829 | while (atomic_read(&netDevice->NumOutstandingSends)) { |
830 | DPRINT_INFO(NETVSC, "waiting for %d requests to complete...", | |
831 | atomic_read(&netDevice->NumOutstandingSends)); | |
b4362c9c | 832 | udelay(100); |
fceaf24a HJ |
833 | } |
834 | ||
835 | DPRINT_INFO(NETVSC, "Disconnecting from netvsp..."); | |
836 | ||
837 | NetVscDisconnectFromVsp(netDevice); | |
838 | ||
21a80820 GKH |
839 | DPRINT_INFO(NETVSC, "Disabling inbound traffic on net device (%p)...", |
840 | Device->Extension); | |
fceaf24a | 841 | |
454f18a9 | 842 | /* Stop inbound traffic ie receives and sends completions */ |
fceaf24a HJ |
843 | netDevice = ReleaseInboundNetDevice(Device); |
844 | ||
454f18a9 | 845 | /* At this point, no one should be accessing netDevice except in here */ |
fceaf24a HJ |
846 | DPRINT_INFO(NETVSC, "net device (%p) safe to remove", netDevice); |
847 | ||
454f18a9 | 848 | /* Now, we can close the channel safely */ |
fceaf24a HJ |
849 | Device->Driver->VmbusChannelInterface.Close(Device); |
850 | ||
454f18a9 | 851 | /* Release all resources */ |
d29274ef BP |
852 | list_for_each_entry_safe(netvscPacket, pos, |
853 | &netDevice->ReceivePacketList, ListEntry) { | |
854 | list_del(&netvscPacket->ListEntry); | |
8c69f52a | 855 | kfree(netvscPacket); |
fceaf24a HJ |
856 | } |
857 | ||
420beac4 | 858 | kfree(netDevice->ChannelInitEvent); |
fceaf24a HJ |
859 | FreeNetDevice(netDevice); |
860 | ||
861 | DPRINT_EXIT(NETVSC); | |
21a80820 | 862 | return 0; |
fceaf24a HJ |
863 | } |
864 | ||
21a80820 GKH |
865 | /** |
866 | * NetVscOnCleanup - Perform any cleanup when the driver is removed | |
867 | */ | |
868 | static void NetVscOnCleanup(struct hv_driver *drv) | |
fceaf24a HJ |
869 | { |
870 | DPRINT_ENTER(NETVSC); | |
fceaf24a HJ |
871 | DPRINT_EXIT(NETVSC); |
872 | } | |
873 | ||
21a80820 GKH |
874 | static void NetVscOnSendCompletion(struct hv_device *Device, |
875 | struct vmpacket_descriptor *Packet) | |
fceaf24a | 876 | { |
ce9ea4cf | 877 | struct netvsc_device *netDevice; |
223c1aa6 | 878 | struct nvsp_message *nvspPacket; |
4193d4f4 | 879 | struct hv_netvsc_packet *nvscPacket; |
fceaf24a HJ |
880 | |
881 | DPRINT_ENTER(NETVSC); | |
882 | ||
883 | netDevice = GetInboundNetDevice(Device); | |
21a80820 GKH |
884 | if (!netDevice) { |
885 | DPRINT_ERR(NETVSC, "unable to get net device..." | |
886 | "device being destroyed?"); | |
fceaf24a HJ |
887 | DPRINT_EXIT(NETVSC); |
888 | return; | |
889 | } | |
890 | ||
223c1aa6 | 891 | nvspPacket = (struct nvsp_message *)((unsigned long)Packet + (Packet->DataOffset8 << 3)); |
fceaf24a | 892 | |
21a80820 GKH |
893 | DPRINT_DBG(NETVSC, "send completion packet - type %d", |
894 | nvspPacket->Header.MessageType); | |
fceaf24a | 895 | |
21a80820 GKH |
896 | if ((nvspPacket->Header.MessageType == NvspMessageTypeInitComplete) || |
897 | (nvspPacket->Header.MessageType == | |
898 | NvspMessage1TypeSendReceiveBufferComplete) || | |
899 | (nvspPacket->Header.MessageType == | |
900 | NvspMessage1TypeSendSendBufferComplete)) { | |
454f18a9 | 901 | /* Copy the response back */ |
21a80820 GKH |
902 | memcpy(&netDevice->ChannelInitPacket, nvspPacket, |
903 | sizeof(struct nvsp_message)); | |
bfc30aae | 904 | osd_WaitEventSet(netDevice->ChannelInitEvent); |
21a80820 GKH |
905 | } else if (nvspPacket->Header.MessageType == |
906 | NvspMessage1TypeSendRNDISPacketComplete) { | |
454f18a9 | 907 | /* Get the send context */ |
4193d4f4 | 908 | nvscPacket = (struct hv_netvsc_packet *)(unsigned long)Packet->TransactionId; |
fceaf24a HJ |
909 | ASSERT(nvscPacket); |
910 | ||
454f18a9 | 911 | /* Notify the layer above us */ |
fceaf24a HJ |
912 | nvscPacket->Completion.Send.OnSendCompletion(nvscPacket->Completion.Send.SendCompletionContext); |
913 | ||
f4888417 | 914 | atomic_dec(&netDevice->NumOutstandingSends); |
21a80820 GKH |
915 | } else { |
916 | DPRINT_ERR(NETVSC, "Unknown send completion packet type - " | |
917 | "%d received!!", nvspPacket->Header.MessageType); | |
fceaf24a HJ |
918 | } |
919 | ||
920 | PutNetDevice(Device); | |
921 | DPRINT_EXIT(NETVSC); | |
922 | } | |
923 | ||
21a80820 GKH |
924 | static int NetVscOnSend(struct hv_device *Device, |
925 | struct hv_netvsc_packet *Packet) | |
fceaf24a | 926 | { |
ce9ea4cf | 927 | struct netvsc_device *netDevice; |
21a80820 | 928 | int ret = 0; |
fceaf24a | 929 | |
223c1aa6 | 930 | struct nvsp_message sendMessage; |
fceaf24a HJ |
931 | |
932 | DPRINT_ENTER(NETVSC); | |
933 | ||
934 | netDevice = GetOutboundNetDevice(Device); | |
21a80820 GKH |
935 | if (!netDevice) { |
936 | DPRINT_ERR(NETVSC, "net device (%p) shutting down..." | |
937 | "ignoring outbound packets", netDevice); | |
fceaf24a HJ |
938 | DPRINT_EXIT(NETVSC); |
939 | return -2; | |
940 | } | |
941 | ||
942 | sendMessage.Header.MessageType = NvspMessage1TypeSendRNDISPacket; | |
21a80820 GKH |
943 | if (Packet->IsDataPacket) { |
944 | /* 0 is RMC_DATA; */ | |
945 | sendMessage.Messages.Version1Messages.SendRNDISPacket.ChannelType = 0; | |
946 | } else { | |
947 | /* 1 is RMC_CONTROL; */ | |
948 | sendMessage.Messages.Version1Messages.SendRNDISPacket.ChannelType = 1; | |
949 | } | |
fceaf24a | 950 | |
454f18a9 | 951 | /* Not using send buffer section */ |
21a80820 GKH |
952 | sendMessage.Messages.Version1Messages.SendRNDISPacket.SendBufferSectionIndex = 0xFFFFFFFF; |
953 | sendMessage.Messages.Version1Messages.SendRNDISPacket.SendBufferSectionSize = 0; | |
954 | ||
955 | if (Packet->PageBufferCount) { | |
956 | ret = Device->Driver->VmbusChannelInterface.SendPacketPageBuffer( | |
957 | Device, Packet->PageBuffers, | |
958 | Packet->PageBufferCount, | |
959 | &sendMessage, | |
960 | sizeof(struct nvsp_message), | |
961 | (unsigned long)Packet); | |
962 | } else { | |
fceaf24a | 963 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
21a80820 GKH |
964 | &sendMessage, |
965 | sizeof(struct nvsp_message), | |
966 | (unsigned long)Packet, | |
967 | VmbusPacketTypeDataInBand, | |
968 | VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); | |
fceaf24a HJ |
969 | |
970 | } | |
971 | ||
972 | if (ret != 0) | |
21a80820 GKH |
973 | DPRINT_ERR(NETVSC, "Unable to send packet %p ret %d", |
974 | Packet, ret); | |
fceaf24a | 975 | |
f4888417 | 976 | atomic_inc(&netDevice->NumOutstandingSends); |
fceaf24a HJ |
977 | PutNetDevice(Device); |
978 | ||
979 | DPRINT_EXIT(NETVSC); | |
980 | return ret; | |
981 | } | |
982 | ||
21a80820 GKH |
983 | static void NetVscOnReceive(struct hv_device *Device, |
984 | struct vmpacket_descriptor *Packet) | |
fceaf24a | 985 | { |
ce9ea4cf | 986 | struct netvsc_device *netDevice; |
8dc0a06a | 987 | struct vmtransfer_page_packet_header *vmxferpagePacket; |
223c1aa6 | 988 | struct nvsp_message *nvspPacket; |
21a80820 | 989 | struct hv_netvsc_packet *netvscPacket = NULL; |
c4b0bc94 GKH |
990 | unsigned long start; |
991 | unsigned long end, endVirtual; | |
7e23a6e9 | 992 | /* struct netvsc_driver *netvscDriver; */ |
21a80820 | 993 | struct xferpage_packet *xferpagePacket = NULL; |
21a80820 GKH |
994 | int i, j; |
995 | int count = 0, bytesRemain = 0; | |
6436873a | 996 | unsigned long flags; |
d29274ef | 997 | LIST_HEAD(listHead); |
fceaf24a HJ |
998 | |
999 | DPRINT_ENTER(NETVSC); | |
1000 | ||
1001 | netDevice = GetInboundNetDevice(Device); | |
21a80820 GKH |
1002 | if (!netDevice) { |
1003 | DPRINT_ERR(NETVSC, "unable to get net device..." | |
1004 | "device being destroyed?"); | |
fceaf24a HJ |
1005 | DPRINT_EXIT(NETVSC); |
1006 | return; | |
1007 | } | |
1008 | ||
21a80820 GKH |
1009 | /* |
1010 | * All inbound packets other than send completion should be xfer page | |
1011 | * packet | |
1012 | */ | |
1013 | if (Packet->Type != VmbusPacketTypeDataUsingTransferPages) { | |
1014 | DPRINT_ERR(NETVSC, "Unknown packet type received - %d", | |
1015 | Packet->Type); | |
fceaf24a HJ |
1016 | PutNetDevice(Device); |
1017 | return; | |
1018 | } | |
1019 | ||
21a80820 GKH |
1020 | nvspPacket = (struct nvsp_message *)((unsigned long)Packet + |
1021 | (Packet->DataOffset8 << 3)); | |
fceaf24a | 1022 | |
454f18a9 | 1023 | /* Make sure this is a valid nvsp packet */ |
21a80820 GKH |
1024 | if (nvspPacket->Header.MessageType != NvspMessage1TypeSendRNDISPacket) { |
1025 | DPRINT_ERR(NETVSC, "Unknown nvsp packet type received - %d", | |
1026 | nvspPacket->Header.MessageType); | |
fceaf24a HJ |
1027 | PutNetDevice(Device); |
1028 | return; | |
1029 | } | |
1030 | ||
21a80820 GKH |
1031 | DPRINT_DBG(NETVSC, "NVSP packet received - type %d", |
1032 | nvspPacket->Header.MessageType); | |
fceaf24a | 1033 | |
8dc0a06a | 1034 | vmxferpagePacket = (struct vmtransfer_page_packet_header *)Packet; |
fceaf24a | 1035 | |
21a80820 GKH |
1036 | if (vmxferpagePacket->TransferPageSetId != NETVSC_RECEIVE_BUFFER_ID) { |
1037 | DPRINT_ERR(NETVSC, "Invalid xfer page set id - " | |
1038 | "expecting %x got %x", NETVSC_RECEIVE_BUFFER_ID, | |
1039 | vmxferpagePacket->TransferPageSetId); | |
fceaf24a HJ |
1040 | PutNetDevice(Device); |
1041 | return; | |
1042 | } | |
1043 | ||
21a80820 GKH |
1044 | DPRINT_DBG(NETVSC, "xfer page - range count %d", |
1045 | vmxferpagePacket->RangeCount); | |
fceaf24a | 1046 | |
454f18a9 BP |
1047 | /* |
1048 | * Grab free packets (range count + 1) to represent this xfer | |
1049 | * page packet. +1 to represent the xfer page packet itself. | |
1050 | * We grab it here so that we know exactly how many we can | |
1051 | * fulfil | |
1052 | */ | |
6436873a | 1053 | spin_lock_irqsave(&netDevice->receive_packet_list_lock, flags); |
d29274ef BP |
1054 | while (!list_empty(&netDevice->ReceivePacketList)) { |
1055 | list_move_tail(&netDevice->ReceivePacketList, &listHead); | |
fceaf24a HJ |
1056 | if (++count == vmxferpagePacket->RangeCount + 1) |
1057 | break; | |
1058 | } | |
6436873a | 1059 | spin_unlock_irqrestore(&netDevice->receive_packet_list_lock, flags); |
fceaf24a | 1060 | |
454f18a9 BP |
1061 | /* |
1062 | * We need at least 2 netvsc pkts (1 to represent the xfer | |
1063 | * page and at least 1 for the range) i.e. we can handled | |
1064 | * some of the xfer page packet ranges... | |
1065 | */ | |
21a80820 GKH |
1066 | if (count < 2) { |
1067 | DPRINT_ERR(NETVSC, "Got only %d netvsc pkt...needed %d pkts. " | |
1068 | "Dropping this xfer page packet completely!", | |
1069 | count, vmxferpagePacket->RangeCount + 1); | |
fceaf24a | 1070 | |
454f18a9 | 1071 | /* Return it to the freelist */ |
6436873a | 1072 | spin_lock_irqsave(&netDevice->receive_packet_list_lock, flags); |
21a80820 | 1073 | for (i = count; i != 0; i--) { |
d29274ef BP |
1074 | list_move_tail(&listHead, |
1075 | &netDevice->ReceivePacketList); | |
fceaf24a | 1076 | } |
21a80820 GKH |
1077 | spin_unlock_irqrestore(&netDevice->receive_packet_list_lock, |
1078 | flags); | |
fceaf24a | 1079 | |
21a80820 GKH |
1080 | NetVscSendReceiveCompletion(Device, |
1081 | vmxferpagePacket->d.TransactionId); | |
fceaf24a HJ |
1082 | |
1083 | PutNetDevice(Device); | |
1084 | return; | |
1085 | } | |
1086 | ||
454f18a9 | 1087 | /* Remove the 1st packet to represent the xfer page packet itself */ |
d29274ef BP |
1088 | xferpagePacket = list_entry(&listHead, struct xferpage_packet, |
1089 | ListEntry); | |
1090 | list_del(&xferpagePacket->ListEntry); | |
1091 | ||
21a80820 GKH |
1092 | /* This is how much we can satisfy */ |
1093 | xferpagePacket->Count = count - 1; | |
1094 | ASSERT(xferpagePacket->Count > 0 && xferpagePacket->Count <= | |
1095 | vmxferpagePacket->RangeCount); | |
1096 | ||
1097 | if (xferpagePacket->Count != vmxferpagePacket->RangeCount) { | |
1098 | DPRINT_INFO(NETVSC, "Needed %d netvsc pkts to satisy this xfer " | |
1099 | "page...got %d", vmxferpagePacket->RangeCount, | |
1100 | xferpagePacket->Count); | |
fceaf24a HJ |
1101 | } |
1102 | ||
454f18a9 | 1103 | /* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */ |
21a80820 | 1104 | for (i = 0; i < (count - 1); i++) { |
d29274ef BP |
1105 | netvscPacket = list_entry(&listHead, struct hv_netvsc_packet, |
1106 | ListEntry); | |
1107 | list_del(&netvscPacket->ListEntry); | |
fceaf24a | 1108 | |
454f18a9 | 1109 | /* Initialize the netvsc packet */ |
fceaf24a | 1110 | netvscPacket->XferPagePacket = xferpagePacket; |
21a80820 GKH |
1111 | netvscPacket->Completion.Recv.OnReceiveCompletion = |
1112 | NetVscOnReceiveCompletion; | |
1113 | netvscPacket->Completion.Recv.ReceiveCompletionContext = | |
1114 | netvscPacket; | |
fceaf24a | 1115 | netvscPacket->Device = Device; |
21a80820 GKH |
1116 | /* Save this so that we can send it back */ |
1117 | netvscPacket->Completion.Recv.ReceiveCompletionTid = | |
1118 | vmxferpagePacket->d.TransactionId; | |
fceaf24a | 1119 | |
21a80820 GKH |
1120 | netvscPacket->TotalDataBufferLength = |
1121 | vmxferpagePacket->Ranges[i].ByteCount; | |
fceaf24a HJ |
1122 | netvscPacket->PageBufferCount = 1; |
1123 | ||
21a80820 GKH |
1124 | ASSERT(vmxferpagePacket->Ranges[i].ByteOffset + |
1125 | vmxferpagePacket->Ranges[i].ByteCount < | |
1126 | netDevice->ReceiveBufferSize); | |
fceaf24a | 1127 | |
21a80820 GKH |
1128 | netvscPacket->PageBuffers[0].Length = |
1129 | vmxferpagePacket->Ranges[i].ByteCount; | |
fceaf24a | 1130 | |
21a80820 | 1131 | start = virt_to_phys((void *)((unsigned long)netDevice->ReceiveBuffer + vmxferpagePacket->Ranges[i].ByteOffset)); |
fceaf24a HJ |
1132 | |
1133 | netvscPacket->PageBuffers[0].Pfn = start >> PAGE_SHIFT; | |
c4b0bc94 | 1134 | endVirtual = (unsigned long)netDevice->ReceiveBuffer |
fceaf24a | 1135 | + vmxferpagePacket->Ranges[i].ByteOffset |
21a80820 GKH |
1136 | + vmxferpagePacket->Ranges[i].ByteCount - 1; |
1137 | end = virt_to_phys((void *)endVirtual); | |
fceaf24a | 1138 | |
454f18a9 | 1139 | /* Calculate the page relative offset */ |
21a80820 GKH |
1140 | netvscPacket->PageBuffers[0].Offset = |
1141 | vmxferpagePacket->Ranges[i].ByteOffset & (PAGE_SIZE - 1); | |
1142 | if ((end >> PAGE_SHIFT) != (start >> PAGE_SHIFT)) { | |
1143 | /* Handle frame across multiple pages: */ | |
1144 | netvscPacket->PageBuffers[0].Length = | |
1145 | (netvscPacket->PageBuffers[0].Pfn << PAGE_SHIFT) | |
1146 | + PAGE_SIZE - start; | |
1147 | bytesRemain = netvscPacket->TotalDataBufferLength - | |
1148 | netvscPacket->PageBuffers[0].Length; | |
1149 | for (j = 1; j < NETVSC_PACKET_MAXPAGE; j++) { | |
1150 | netvscPacket->PageBuffers[j].Offset = 0; | |
1151 | if (bytesRemain <= PAGE_SIZE) { | |
1152 | netvscPacket->PageBuffers[j].Length = bytesRemain; | |
1153 | bytesRemain = 0; | |
1154 | } else { | |
1155 | netvscPacket->PageBuffers[j].Length = PAGE_SIZE; | |
1156 | bytesRemain -= PAGE_SIZE; | |
1157 | } | |
1158 | netvscPacket->PageBuffers[j].Pfn = | |
1159 | virt_to_phys((void *)(endVirtual - bytesRemain)) >> PAGE_SHIFT; | |
1160 | netvscPacket->PageBufferCount++; | |
1161 | if (bytesRemain == 0) | |
1162 | break; | |
fceaf24a | 1163 | } |
21a80820 | 1164 | ASSERT(bytesRemain == 0); |
fceaf24a | 1165 | } |
21a80820 GKH |
1166 | DPRINT_DBG(NETVSC, "[%d] - (abs offset %u len %u) => " |
1167 | "(pfn %llx, offset %u, len %u)", i, | |
1168 | vmxferpagePacket->Ranges[i].ByteOffset, | |
1169 | vmxferpagePacket->Ranges[i].ByteCount, | |
1170 | netvscPacket->PageBuffers[0].Pfn, | |
1171 | netvscPacket->PageBuffers[0].Offset, | |
1172 | netvscPacket->PageBuffers[0].Length); | |
fceaf24a | 1173 | |
454f18a9 | 1174 | /* Pass it to the upper layer */ |
7e23a6e9 | 1175 | ((struct netvsc_driver *)Device->Driver)->OnReceiveCallback(Device, netvscPacket); |
fceaf24a HJ |
1176 | |
1177 | NetVscOnReceiveCompletion(netvscPacket->Completion.Recv.ReceiveCompletionContext); | |
1178 | } | |
1179 | ||
d29274ef | 1180 | ASSERT(list_empty(&listHead)); |
fceaf24a HJ |
1181 | |
1182 | PutNetDevice(Device); | |
1183 | DPRINT_EXIT(NETVSC); | |
1184 | } | |
1185 | ||
21a80820 GKH |
1186 | static void NetVscSendReceiveCompletion(struct hv_device *Device, |
1187 | u64 TransactionId) | |
fceaf24a | 1188 | { |
223c1aa6 | 1189 | struct nvsp_message recvcompMessage; |
21a80820 GKH |
1190 | int retries = 0; |
1191 | int ret; | |
fceaf24a | 1192 | |
21a80820 GKH |
1193 | DPRINT_DBG(NETVSC, "Sending receive completion pkt - %llx", |
1194 | TransactionId); | |
fceaf24a | 1195 | |
21a80820 GKH |
1196 | recvcompMessage.Header.MessageType = |
1197 | NvspMessage1TypeSendRNDISPacketComplete; | |
fceaf24a | 1198 | |
454f18a9 | 1199 | /* FIXME: Pass in the status */ |
fceaf24a HJ |
1200 | recvcompMessage.Messages.Version1Messages.SendRNDISPacketComplete.Status = NvspStatusSuccess; |
1201 | ||
1202 | retry_send_cmplt: | |
454f18a9 | 1203 | /* Send the completion */ |
fceaf24a | 1204 | ret = Device->Driver->VmbusChannelInterface.SendPacket(Device, |
21a80820 GKH |
1205 | &recvcompMessage, |
1206 | sizeof(struct nvsp_message), | |
1207 | TransactionId, | |
1208 | VmbusPacketTypeCompletion, 0); | |
1209 | if (ret == 0) { | |
1210 | /* success */ | |
454f18a9 | 1211 | /* no-op */ |
21a80820 GKH |
1212 | } else if (ret == -1) { |
1213 | /* no more room...wait a bit and attempt to retry 3 times */ | |
fceaf24a | 1214 | retries++; |
21a80820 GKH |
1215 | DPRINT_ERR(NETVSC, "unable to send receive completion pkt " |
1216 | "(tid %llx)...retrying %d", TransactionId, retries); | |
fceaf24a | 1217 | |
21a80820 | 1218 | if (retries < 4) { |
b4362c9c | 1219 | udelay(100); |
fceaf24a | 1220 | goto retry_send_cmplt; |
21a80820 GKH |
1221 | } else { |
1222 | DPRINT_ERR(NETVSC, "unable to send receive completion " | |
1223 | "pkt (tid %llx)...give up retrying", | |
1224 | TransactionId); | |
fceaf24a | 1225 | } |
21a80820 GKH |
1226 | } else { |
1227 | DPRINT_ERR(NETVSC, "unable to send receive completion pkt - " | |
1228 | "%llx", TransactionId); | |
fceaf24a HJ |
1229 | } |
1230 | } | |
1231 | ||
454f18a9 | 1232 | /* Send a receive completion packet to RNDIS device (ie NetVsp) */ |
21a80820 | 1233 | static void NetVscOnReceiveCompletion(void *Context) |
fceaf24a | 1234 | { |
21a80820 GKH |
1235 | struct hv_netvsc_packet *packet = Context; |
1236 | struct hv_device *device = (struct hv_device *)packet->Device; | |
ce9ea4cf | 1237 | struct netvsc_device *netDevice; |
21a80820 | 1238 | u64 transactionId = 0; |
0e727613 | 1239 | bool fSendReceiveComp = false; |
6436873a | 1240 | unsigned long flags; |
fceaf24a HJ |
1241 | |
1242 | DPRINT_ENTER(NETVSC); | |
1243 | ||
1244 | ASSERT(packet->XferPagePacket); | |
1245 | ||
21a80820 GKH |
1246 | /* |
1247 | * Even though it seems logical to do a GetOutboundNetDevice() here to | |
1248 | * send out receive completion, we are using GetInboundNetDevice() | |
1249 | * since we may have disable outbound traffic already. | |
1250 | */ | |
fceaf24a | 1251 | netDevice = GetInboundNetDevice(device); |
21a80820 GKH |
1252 | if (!netDevice) { |
1253 | DPRINT_ERR(NETVSC, "unable to get net device..." | |
1254 | "device being destroyed?"); | |
fceaf24a HJ |
1255 | DPRINT_EXIT(NETVSC); |
1256 | return; | |
1257 | } | |
1258 | ||
454f18a9 | 1259 | /* Overloading use of the lock. */ |
6436873a | 1260 | spin_lock_irqsave(&netDevice->receive_packet_list_lock, flags); |
fceaf24a HJ |
1261 | |
1262 | ASSERT(packet->XferPagePacket->Count > 0); | |
1263 | packet->XferPagePacket->Count--; | |
1264 | ||
21a80820 GKH |
1265 | /* |
1266 | * Last one in the line that represent 1 xfer page packet. | |
1267 | * Return the xfer page packet itself to the freelist | |
1268 | */ | |
1269 | if (packet->XferPagePacket->Count == 0) { | |
0e727613 | 1270 | fSendReceiveComp = true; |
fceaf24a | 1271 | transactionId = packet->Completion.Recv.ReceiveCompletionTid; |
d29274ef BP |
1272 | list_add_tail(&packet->XferPagePacket->ListEntry, |
1273 | &netDevice->ReceivePacketList); | |
fceaf24a | 1274 | |
fceaf24a HJ |
1275 | } |
1276 | ||
454f18a9 | 1277 | /* Put the packet back */ |
d29274ef | 1278 | list_add_tail(&packet->ListEntry, &netDevice->ReceivePacketList); |
6436873a | 1279 | spin_unlock_irqrestore(&netDevice->receive_packet_list_lock, flags); |
fceaf24a | 1280 | |
454f18a9 | 1281 | /* Send a receive completion for the xfer page packet */ |
fceaf24a | 1282 | if (fSendReceiveComp) |
fceaf24a | 1283 | NetVscSendReceiveCompletion(device, transactionId); |
fceaf24a HJ |
1284 | |
1285 | PutNetDevice(device); | |
1286 | DPRINT_EXIT(NETVSC); | |
1287 | } | |
1288 | ||
21a80820 | 1289 | void NetVscOnChannelCallback(void *Context) |
fceaf24a | 1290 | { |
21a80820 GKH |
1291 | const int netPacketSize = 2048; |
1292 | int ret; | |
1293 | struct hv_device *device = Context; | |
ce9ea4cf | 1294 | struct netvsc_device *netDevice; |
4d643114 | 1295 | u32 bytesRecvd; |
59471438 GKH |
1296 | u64 requestId; |
1297 | unsigned char packet[netPacketSize]; | |
8dc0a06a | 1298 | struct vmpacket_descriptor *desc; |
21a80820 GKH |
1299 | unsigned char *buffer = packet; |
1300 | int bufferlen = netPacketSize; | |
fceaf24a HJ |
1301 | |
1302 | ||
1303 | DPRINT_ENTER(NETVSC); | |
1304 | ||
1305 | ASSERT(device); | |
1306 | ||
1307 | netDevice = GetInboundNetDevice(device); | |
21a80820 GKH |
1308 | if (!netDevice) { |
1309 | DPRINT_ERR(NETVSC, "net device (%p) shutting down..." | |
1310 | "ignoring inbound packets", netDevice); | |
fceaf24a HJ |
1311 | DPRINT_EXIT(NETVSC); |
1312 | return; | |
1313 | } | |
1314 | ||
21a80820 GKH |
1315 | do { |
1316 | ret = device->Driver->VmbusChannelInterface.RecvPacketRaw( | |
1317 | device, buffer, bufferlen, | |
1318 | &bytesRecvd, &requestId); | |
1319 | if (ret == 0) { | |
1320 | if (bytesRecvd > 0) { | |
1321 | DPRINT_DBG(NETVSC, "receive %d bytes, tid %llx", | |
1322 | bytesRecvd, requestId); | |
1323 | ||
1324 | desc = (struct vmpacket_descriptor *)buffer; | |
1325 | switch (desc->Type) { | |
1326 | case VmbusPacketTypeCompletion: | |
1327 | NetVscOnSendCompletion(device, desc); | |
1328 | break; | |
1329 | ||
1330 | case VmbusPacketTypeDataUsingTransferPages: | |
1331 | NetVscOnReceive(device, desc); | |
1332 | break; | |
1333 | ||
1334 | default: | |
1335 | DPRINT_ERR(NETVSC, | |
1336 | "unhandled packet type %d, " | |
1337 | "tid %llx len %d\n", | |
1338 | desc->Type, requestId, | |
1339 | bytesRecvd); | |
1340 | break; | |
fceaf24a HJ |
1341 | } |
1342 | ||
454f18a9 | 1343 | /* reset */ |
21a80820 | 1344 | if (bufferlen > netPacketSize) { |
8c69f52a | 1345 | kfree(buffer); |
fceaf24a HJ |
1346 | buffer = packet; |
1347 | bufferlen = netPacketSize; | |
1348 | } | |
21a80820 | 1349 | } else { |
454f18a9 | 1350 | /* reset */ |
21a80820 | 1351 | if (bufferlen > netPacketSize) { |
8c69f52a | 1352 | kfree(buffer); |
fceaf24a HJ |
1353 | buffer = packet; |
1354 | bufferlen = netPacketSize; | |
1355 | } | |
1356 | ||
1357 | break; | |
1358 | } | |
21a80820 GKH |
1359 | } else if (ret == -2) { |
1360 | /* Handle large packet */ | |
0a72f3cf | 1361 | buffer = kmalloc(bytesRecvd, GFP_ATOMIC); |
21a80820 | 1362 | if (buffer == NULL) { |
454f18a9 | 1363 | /* Try again next time around */ |
21a80820 GKH |
1364 | DPRINT_ERR(NETVSC, |
1365 | "unable to allocate buffer of size " | |
1366 | "(%d)!!", bytesRecvd); | |
fceaf24a HJ |
1367 | break; |
1368 | } | |
1369 | ||
1370 | bufferlen = bytesRecvd; | |
21a80820 | 1371 | } else { |
fceaf24a HJ |
1372 | ASSERT(0); |
1373 | } | |
1374 | } while (1); | |
1375 | ||
1376 | PutNetDevice(device); | |
1377 | DPRINT_EXIT(NETVSC); | |
1378 | return; | |
1379 | } |