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12384f9b LE |
1 | /** @file\r |
2 | \r | |
3 | Implementation of the SNP.Initialize() function and its private helpers if\r | |
4 | any.\r | |
5 | \r | |
6 | Copyright (C) 2013, Red Hat, Inc.\r | |
7 | Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r | |
8 | \r | |
9 | This program and the accompanying materials are licensed and made available\r | |
10 | under the terms and conditions of the BSD License which accompanies this\r | |
11 | distribution. The full text of the license may be found at\r | |
12 | http://opensource.org/licenses/bsd-license.php\r | |
13 | \r | |
14 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT\r | |
15 | WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
16 | \r | |
17 | **/\r | |
18 | \r | |
19 | #include <Library/BaseLib.h>\r | |
20 | #include <Library/MemoryAllocationLib.h>\r | |
21 | #include <Library/UefiBootServicesTableLib.h>\r | |
22 | \r | |
23 | #include "VirtioNet.h"\r | |
24 | \r | |
25 | /**\r | |
26 | Initialize a virtio ring for a specific transfer direction of the virtio-net\r | |
27 | device.\r | |
28 | \r | |
29 | This function may only be called by VirtioNetInitialize().\r | |
30 | \r | |
31 | @param[in,out] Dev The VNET_DEV driver instance about to enter the\r | |
32 | EfiSimpleNetworkInitialized state.\r | |
33 | @param[in] Selector Identifies the transfer direction (virtio queue) of\r | |
34 | the network device.\r | |
35 | @param[out] Ring The virtio-ring inside the VNET_DEV structure,\r | |
36 | corresponding to Selector.\r | |
37 | \r | |
38 | @retval EFI_UNSUPPORTED The queue size reported by the virtio-net device is\r | |
39 | too small.\r | |
40 | @return Status codes from VIRTIO_CFG_WRITE(),\r | |
41 | VIRTIO_CFG_READ() and VirtioRingInit().\r | |
42 | @retval EFI_SUCCESS Ring initialized.\r | |
43 | */\r | |
44 | \r | |
45 | STATIC\r | |
46 | EFI_STATUS\r | |
47 | EFIAPI\r | |
48 | VirtioNetInitRing (\r | |
49 | IN OUT VNET_DEV *Dev,\r | |
50 | IN UINT16 Selector,\r | |
51 | OUT VRING *Ring\r | |
52 | )\r | |
53 | {\r | |
54 | EFI_STATUS Status;\r | |
55 | UINT16 QueueSize;\r | |
56 | \r | |
57 | //\r | |
58 | // step 4b -- allocate selected queue\r | |
59 | //\r | |
56f65ed8 | 60 | Status = Dev->VirtIo->SetQueueSel (Dev->VirtIo, Selector);\r |
12384f9b LE |
61 | if (EFI_ERROR (Status)) {\r |
62 | return Status;\r | |
63 | }\r | |
56f65ed8 | 64 | Status = Dev->VirtIo->GetQueueNumMax (Dev->VirtIo, &QueueSize);\r |
12384f9b LE |
65 | if (EFI_ERROR (Status)) {\r |
66 | return Status;\r | |
67 | }\r | |
56f65ed8 | 68 | \r |
12384f9b LE |
69 | //\r |
70 | // For each packet (RX and TX alike), we need two descriptors:\r | |
71 | // one for the virtio-net request header, and another one for the data\r | |
72 | //\r | |
73 | if (QueueSize < 2) {\r | |
74 | return EFI_UNSUPPORTED;\r | |
75 | }\r | |
76 | Status = VirtioRingInit (QueueSize, Ring);\r | |
77 | if (EFI_ERROR (Status)) {\r | |
78 | return Status;\r | |
79 | }\r | |
80 | \r | |
56f65ed8 OM |
81 | //\r |
82 | // Additional steps for MMIO: align the queue appropriately, and set the\r | |
83 | // size. If anything fails from here on, we must release the ring resources.\r | |
84 | //\r | |
85 | Status = Dev->VirtIo->SetQueueNum (Dev->VirtIo, QueueSize);\r | |
86 | if (EFI_ERROR (Status)) {\r | |
87 | goto ReleaseQueue;\r | |
88 | }\r | |
89 | \r | |
90 | Status = Dev->VirtIo->SetQueueAlign (Dev->VirtIo, EFI_PAGE_SIZE);\r | |
91 | if (EFI_ERROR (Status)) {\r | |
92 | goto ReleaseQueue;\r | |
93 | }\r | |
94 | \r | |
12384f9b LE |
95 | //\r |
96 | // step 4c -- report GPFN (guest-physical frame number) of queue\r | |
97 | //\r | |
07af4eee | 98 | Status = Dev->VirtIo->SetQueueAddress (Dev->VirtIo, Ring);\r |
12384f9b | 99 | if (EFI_ERROR (Status)) {\r |
56f65ed8 | 100 | goto ReleaseQueue;\r |
12384f9b | 101 | }\r |
56f65ed8 OM |
102 | \r |
103 | return EFI_SUCCESS;\r | |
104 | \r | |
105 | ReleaseQueue:\r | |
106 | VirtioRingUninit (Ring);\r | |
107 | \r | |
12384f9b LE |
108 | return Status;\r |
109 | }\r | |
110 | \r | |
111 | \r | |
112 | /**\r | |
113 | Set up static scaffolding for the VirtioNetTransmit() and\r | |
114 | VirtioNetGetStatus() SNP methods.\r | |
115 | \r | |
116 | This function may only be called by VirtioNetInitialize().\r | |
117 | \r | |
118 | The structures laid out and resources configured include:\r | |
119 | - fully populate the TX queue with a static pattern of virtio descriptor\r | |
120 | chains,\r | |
121 | - tracking of heads of free descriptor chains from the above,\r | |
122 | - one common virtio-net request header (never modified by the host) for all\r | |
123 | pending TX packets,\r | |
124 | - select polling over TX interrupt.\r | |
125 | \r | |
126 | @param[in,out] Dev The VNET_DEV driver instance about to enter the\r | |
127 | EfiSimpleNetworkInitialized state.\r | |
128 | \r | |
129 | @retval EFI_OUT_OF_RESOURCES Failed to allocate the stack to track the heads\r | |
130 | of free descriptor chains.\r | |
131 | @retval EFI_SUCCESS TX setup successful.\r | |
132 | */\r | |
133 | \r | |
134 | STATIC\r | |
135 | EFI_STATUS\r | |
136 | EFIAPI\r | |
137 | VirtioNetInitTx (\r | |
138 | IN OUT VNET_DEV *Dev\r | |
139 | )\r | |
140 | {\r | |
c6e2d064 | 141 | UINTN TxSharedReqSize;\r |
12384f9b LE |
142 | UINTN PktIdx;\r |
143 | \r | |
9f3acbb5 LE |
144 | Dev->TxMaxPending = (UINT16) MIN (Dev->TxRing.QueueSize / 2,\r |
145 | VNET_MAX_PENDING);\r | |
12384f9b LE |
146 | Dev->TxCurPending = 0;\r |
147 | Dev->TxFreeStack = AllocatePool (Dev->TxMaxPending *\r | |
148 | sizeof *Dev->TxFreeStack);\r | |
149 | if (Dev->TxFreeStack == NULL) {\r | |
150 | return EFI_OUT_OF_RESOURCES;\r | |
151 | }\r | |
152 | \r | |
c6e2d064 LE |
153 | //\r |
154 | // In VirtIo 1.0, the NumBuffers field is mandatory. In 0.9.5, it depends on\r | |
155 | // VIRTIO_NET_F_MRG_RXBUF, which we never negotiate.\r | |
156 | //\r | |
157 | TxSharedReqSize = (Dev->VirtIo->Revision < VIRTIO_SPEC_REVISION (1, 0, 0)) ?\r | |
158 | sizeof Dev->TxSharedReq.V0_9_5 :\r | |
159 | sizeof Dev->TxSharedReq;\r | |
160 | \r | |
12384f9b LE |
161 | for (PktIdx = 0; PktIdx < Dev->TxMaxPending; ++PktIdx) {\r |
162 | UINT16 DescIdx;\r | |
163 | \r | |
164 | DescIdx = (UINT16) (2 * PktIdx);\r | |
165 | Dev->TxFreeStack[PktIdx] = DescIdx;\r | |
166 | \r | |
167 | //\r | |
168 | // For each possibly pending packet, lay out the descriptor for the common\r | |
169 | // (unmodified by the host) virtio-net request header.\r | |
170 | //\r | |
171 | Dev->TxRing.Desc[DescIdx].Addr = (UINTN) &Dev->TxSharedReq;\r | |
c6e2d064 | 172 | Dev->TxRing.Desc[DescIdx].Len = (UINT32) TxSharedReqSize;\r |
12384f9b | 173 | Dev->TxRing.Desc[DescIdx].Flags = VRING_DESC_F_NEXT;\r |
9f3acbb5 | 174 | Dev->TxRing.Desc[DescIdx].Next = (UINT16) (DescIdx + 1);\r |
12384f9b LE |
175 | \r |
176 | //\r | |
177 | // The second descriptor of each pending TX packet is updated on the fly,\r | |
178 | // but it always terminates the descriptor chain of the packet.\r | |
179 | //\r | |
180 | Dev->TxRing.Desc[DescIdx + 1].Flags = 0;\r | |
181 | }\r | |
182 | \r | |
183 | //\r | |
184 | // virtio-0.9.5, Appendix C, Packet Transmission\r | |
185 | //\r | |
c6e2d064 LE |
186 | Dev->TxSharedReq.V0_9_5.Flags = 0;\r |
187 | Dev->TxSharedReq.V0_9_5.GsoType = VIRTIO_NET_HDR_GSO_NONE;\r | |
188 | \r | |
189 | //\r | |
190 | // For VirtIo 1.0 only -- the field exists, but it is unused\r | |
191 | //\r | |
192 | Dev->TxSharedReq.NumBuffers = 0;\r | |
12384f9b LE |
193 | \r |
194 | //\r | |
195 | // virtio-0.9.5, 2.4.2 Receiving Used Buffers From the Device\r | |
196 | //\r | |
197 | MemoryFence ();\r | |
198 | Dev->TxLastUsed = *Dev->TxRing.Used.Idx;\r | |
199 | ASSERT (Dev->TxLastUsed == 0);\r | |
200 | \r | |
201 | //\r | |
202 | // want no interrupt when a transmit completes\r | |
203 | //\r | |
204 | *Dev->TxRing.Avail.Flags = (UINT16) VRING_AVAIL_F_NO_INTERRUPT;\r | |
205 | \r | |
206 | return EFI_SUCCESS;\r | |
207 | }\r | |
208 | \r | |
209 | \r | |
210 | /**\r | |
211 | Set up static scaffolding for the VirtioNetReceive() SNP method and enable\r | |
212 | live device operation.\r | |
213 | \r | |
214 | This function may only be called as VirtioNetInitialize()'s final step.\r | |
215 | \r | |
216 | The structures laid out and resources configured include:\r | |
217 | - destination area for the host to write virtio-net request headers and\r | |
218 | packet data into,\r | |
219 | - select polling over RX interrupt,\r | |
220 | - fully populate the RX queue with a static pattern of virtio descriptor\r | |
221 | chains.\r | |
222 | \r | |
223 | @param[in,out] Dev The VNET_DEV driver instance about to enter the\r | |
224 | EfiSimpleNetworkInitialized state.\r | |
225 | \r | |
226 | @retval EFI_OUT_OF_RESOURCES Failed to allocate RX destination area.\r | |
227 | @return Status codes from VIRTIO_CFG_WRITE().\r | |
228 | @retval EFI_SUCCESS RX setup successful. The device is live and may\r | |
229 | already be writing to the receive area.\r | |
230 | */\r | |
231 | \r | |
232 | STATIC\r | |
233 | EFI_STATUS\r | |
234 | EFIAPI\r | |
235 | VirtioNetInitRx (\r | |
236 | IN OUT VNET_DEV *Dev\r | |
237 | )\r | |
238 | {\r | |
239 | EFI_STATUS Status;\r | |
c6e2d064 | 240 | UINTN VirtioNetReqSize;\r |
12384f9b LE |
241 | UINTN RxBufSize;\r |
242 | UINT16 RxAlwaysPending;\r | |
243 | UINTN PktIdx;\r | |
244 | UINT16 DescIdx;\r | |
245 | UINT8 *RxPtr;\r | |
246 | \r | |
c6e2d064 LE |
247 | //\r |
248 | // In VirtIo 1.0, the NumBuffers field is mandatory. In 0.9.5, it depends on\r | |
249 | // VIRTIO_NET_F_MRG_RXBUF, which we never negotiate.\r | |
250 | //\r | |
251 | VirtioNetReqSize = (Dev->VirtIo->Revision < VIRTIO_SPEC_REVISION (1, 0, 0)) ?\r | |
252 | sizeof (VIRTIO_NET_REQ) :\r | |
253 | sizeof (VIRTIO_1_0_NET_REQ);\r | |
254 | \r | |
12384f9b LE |
255 | //\r |
256 | // For each incoming packet we must supply two descriptors:\r | |
257 | // - the recipient for the virtio-net request header, plus\r | |
258 | // - the recipient for the network data (which consists of Ethernet header\r | |
259 | // and Ethernet payload).\r | |
260 | //\r | |
c6e2d064 | 261 | RxBufSize = VirtioNetReqSize +\r |
12384f9b LE |
262 | (Dev->Snm.MediaHeaderSize + Dev->Snm.MaxPacketSize);\r |
263 | \r | |
264 | //\r | |
265 | // Limit the number of pending RX packets if the queue is big. The division\r | |
266 | // by two is due to the above "two descriptors per packet" trait.\r | |
267 | //\r | |
9f3acbb5 | 268 | RxAlwaysPending = (UINT16) MIN (Dev->RxRing.QueueSize / 2, VNET_MAX_PENDING);\r |
12384f9b LE |
269 | \r |
270 | Dev->RxBuf = AllocatePool (RxAlwaysPending * RxBufSize);\r | |
271 | if (Dev->RxBuf == NULL) {\r | |
272 | return EFI_OUT_OF_RESOURCES;\r | |
273 | }\r | |
274 | \r | |
275 | //\r | |
276 | // virtio-0.9.5, 2.4.2 Receiving Used Buffers From the Device\r | |
277 | //\r | |
278 | MemoryFence ();\r | |
279 | Dev->RxLastUsed = *Dev->RxRing.Used.Idx;\r | |
280 | ASSERT (Dev->RxLastUsed == 0);\r | |
281 | \r | |
282 | //\r | |
283 | // virtio-0.9.5, 2.4.2 Receiving Used Buffers From the Device:\r | |
284 | // the host should not send interrupts, we'll poll in VirtioNetReceive()\r | |
285 | // and VirtioNetIsPacketAvailable().\r | |
286 | //\r | |
287 | *Dev->RxRing.Avail.Flags = (UINT16) VRING_AVAIL_F_NO_INTERRUPT;\r | |
288 | \r | |
289 | //\r | |
290 | // now set up a separate, two-part descriptor chain for each RX packet, and\r | |
291 | // link each chain into (from) the available ring as well\r | |
292 | //\r | |
293 | DescIdx = 0;\r | |
294 | RxPtr = Dev->RxBuf;\r | |
295 | for (PktIdx = 0; PktIdx < RxAlwaysPending; ++PktIdx) {\r | |
296 | //\r | |
297 | // virtio-0.9.5, 2.4.1.2 Updating the Available Ring\r | |
298 | // invisible to the host until we update the Index Field\r | |
299 | //\r | |
300 | Dev->RxRing.Avail.Ring[PktIdx] = DescIdx;\r | |
301 | \r | |
302 | //\r | |
303 | // virtio-0.9.5, 2.4.1.1 Placing Buffers into the Descriptor Table\r | |
304 | //\r | |
305 | Dev->RxRing.Desc[DescIdx].Addr = (UINTN) RxPtr;\r | |
c6e2d064 | 306 | Dev->RxRing.Desc[DescIdx].Len = (UINT32) VirtioNetReqSize;\r |
12384f9b | 307 | Dev->RxRing.Desc[DescIdx].Flags = VRING_DESC_F_WRITE | VRING_DESC_F_NEXT;\r |
9f3acbb5 | 308 | Dev->RxRing.Desc[DescIdx].Next = (UINT16) (DescIdx + 1);\r |
12384f9b LE |
309 | RxPtr += Dev->RxRing.Desc[DescIdx++].Len;\r |
310 | \r | |
311 | Dev->RxRing.Desc[DescIdx].Addr = (UINTN) RxPtr;\r | |
c6e2d064 | 312 | Dev->RxRing.Desc[DescIdx].Len = (UINT32) (RxBufSize - VirtioNetReqSize);\r |
12384f9b LE |
313 | Dev->RxRing.Desc[DescIdx].Flags = VRING_DESC_F_WRITE;\r |
314 | RxPtr += Dev->RxRing.Desc[DescIdx++].Len;\r | |
315 | }\r | |
316 | \r | |
317 | //\r | |
318 | // virtio-0.9.5, 2.4.1.3 Updating the Index Field\r | |
319 | //\r | |
320 | MemoryFence ();\r | |
321 | *Dev->RxRing.Avail.Idx = RxAlwaysPending;\r | |
322 | \r | |
323 | //\r | |
324 | // At this point reception may already be running. In order to make it sure,\r | |
325 | // kick the hypervisor. If we fail to kick it, we must first abort reception\r | |
326 | // before tearing down anything, because reception may have been already\r | |
327 | // running even without the kick.\r | |
328 | //\r | |
329 | // virtio-0.9.5, 2.4.1.4 Notifying the Device\r | |
330 | //\r | |
331 | MemoryFence ();\r | |
56f65ed8 | 332 | Status = Dev->VirtIo->SetQueueNotify (Dev->VirtIo, VIRTIO_NET_Q_RX);\r |
12384f9b | 333 | if (EFI_ERROR (Status)) {\r |
56f65ed8 | 334 | Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0);\r |
12384f9b LE |
335 | FreePool (Dev->RxBuf);\r |
336 | }\r | |
337 | \r | |
338 | return Status;\r | |
339 | }\r | |
340 | \r | |
341 | \r | |
342 | /**\r | |
343 | Resets a network adapter and allocates the transmit and receive buffers\r | |
344 | required by the network interface; optionally, also requests allocation of\r | |
345 | additional transmit and receive buffers.\r | |
346 | \r | |
347 | @param This The protocol instance pointer.\r | |
348 | @param ExtraRxBufferSize The size, in bytes, of the extra receive buffer\r | |
349 | space that the driver should allocate for the\r | |
350 | network interface. Some network interfaces will not\r | |
351 | be able to use the extra buffer, and the caller\r | |
352 | will not know if it is actually being used.\r | |
353 | @param ExtraTxBufferSize The size, in bytes, of the extra transmit buffer\r | |
354 | space that the driver should allocate for the\r | |
355 | network interface. Some network interfaces will not\r | |
356 | be able to use the extra buffer, and the caller\r | |
357 | will not know if it is actually being used.\r | |
358 | \r | |
359 | @retval EFI_SUCCESS The network interface was initialized.\r | |
360 | @retval EFI_NOT_STARTED The network interface has not been started.\r | |
361 | @retval EFI_OUT_OF_RESOURCES There was not enough memory for the transmit\r | |
362 | and receive buffers.\r | |
363 | @retval EFI_INVALID_PARAMETER One or more of the parameters has an\r | |
364 | unsupported value.\r | |
365 | @retval EFI_DEVICE_ERROR The command could not be sent to the network\r | |
366 | interface.\r | |
367 | @retval EFI_UNSUPPORTED This function is not supported by the network\r | |
368 | interface.\r | |
369 | \r | |
370 | **/\r | |
371 | \r | |
372 | EFI_STATUS\r | |
373 | EFIAPI\r | |
374 | VirtioNetInitialize (\r | |
375 | IN EFI_SIMPLE_NETWORK_PROTOCOL *This,\r | |
376 | IN UINTN ExtraRxBufferSize OPTIONAL,\r | |
377 | IN UINTN ExtraTxBufferSize OPTIONAL\r | |
378 | )\r | |
379 | {\r | |
380 | VNET_DEV *Dev;\r | |
381 | EFI_TPL OldTpl;\r | |
382 | EFI_STATUS Status;\r | |
383 | UINT8 NextDevStat;\r | |
bc8fde6f | 384 | UINT64 Features;\r |
12384f9b LE |
385 | \r |
386 | if (This == NULL) {\r | |
387 | return EFI_INVALID_PARAMETER;\r | |
388 | }\r | |
389 | if (ExtraRxBufferSize > 0 || ExtraTxBufferSize > 0) {\r | |
390 | return EFI_UNSUPPORTED;\r | |
391 | }\r | |
392 | \r | |
393 | Dev = VIRTIO_NET_FROM_SNP (This);\r | |
394 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r | |
395 | if (Dev->Snm.State != EfiSimpleNetworkStarted) {\r | |
396 | Status = EFI_NOT_STARTED;\r | |
397 | goto InitFailed;\r | |
398 | }\r | |
399 | \r | |
400 | //\r | |
401 | // In the EfiSimpleNetworkStarted state the virtio-net device has status\r | |
402 | // value 0 (= reset) -- see the state diagram, the full call chain to\r | |
403 | // the end of VirtioNetGetFeatures() (considering we're here now),\r | |
404 | // the DeviceFailed label below, and VirtioNetShutdown().\r | |
405 | //\r | |
406 | // Accordingly, the below is a subsequence of the steps found in the\r | |
407 | // virtio-0.9.5 spec, 2.2.1 Device Initialization Sequence.\r | |
408 | //\r | |
409 | NextDevStat = VSTAT_ACK; // step 2 -- acknowledge device presence\r | |
56f65ed8 | 410 | Status = Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, NextDevStat);\r |
12384f9b LE |
411 | if (EFI_ERROR (Status)) {\r |
412 | goto InitFailed;\r | |
413 | }\r | |
414 | \r | |
415 | NextDevStat |= VSTAT_DRIVER; // step 3 -- we know how to drive it\r | |
56f65ed8 OM |
416 | Status = Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, NextDevStat);\r |
417 | if (EFI_ERROR (Status)) {\r | |
418 | goto DeviceFailed;\r | |
419 | }\r | |
420 | \r | |
421 | //\r | |
422 | // Set Page Size - MMIO VirtIo Specific\r | |
423 | //\r | |
424 | Status = Dev->VirtIo->SetPageSize (Dev->VirtIo, EFI_PAGE_SIZE);\r | |
12384f9b LE |
425 | if (EFI_ERROR (Status)) {\r |
426 | goto DeviceFailed;\r | |
427 | }\r | |
428 | \r | |
429 | //\r | |
430 | // step 4a -- retrieve features. Note that we're past validating required\r | |
431 | // features in VirtioNetGetFeatures().\r | |
432 | //\r | |
56f65ed8 | 433 | Status = Dev->VirtIo->GetDeviceFeatures (Dev->VirtIo, &Features);\r |
12384f9b LE |
434 | if (EFI_ERROR (Status)) {\r |
435 | goto DeviceFailed;\r | |
436 | }\r | |
56f65ed8 | 437 | \r |
12384f9b LE |
438 | ASSERT (Features & VIRTIO_NET_F_MAC);\r |
439 | ASSERT (Dev->Snm.MediaPresentSupported ==\r | |
440 | !!(Features & VIRTIO_NET_F_STATUS));\r | |
441 | \r | |
33c6b934 LE |
442 | Features &= VIRTIO_NET_F_MAC | VIRTIO_NET_F_STATUS | VIRTIO_F_VERSION_1;\r |
443 | \r | |
444 | //\r | |
445 | // In virtio-1.0, feature negotiation is expected to complete before queue\r | |
446 | // discovery, and the device can also reject the selected set of features.\r | |
447 | //\r | |
448 | if (Dev->VirtIo->Revision >= VIRTIO_SPEC_REVISION (1, 0, 0)) {\r | |
449 | Status = Virtio10WriteFeatures (Dev->VirtIo, Features, &NextDevStat);\r | |
450 | if (EFI_ERROR (Status)) {\r | |
451 | goto DeviceFailed;\r | |
452 | }\r | |
453 | }\r | |
454 | \r | |
12384f9b LE |
455 | //\r |
456 | // step 4b, 4c -- allocate and report virtqueues\r | |
457 | //\r | |
458 | Status = VirtioNetInitRing (Dev, VIRTIO_NET_Q_RX, &Dev->RxRing);\r | |
459 | if (EFI_ERROR (Status)) {\r | |
460 | goto DeviceFailed;\r | |
461 | }\r | |
462 | \r | |
463 | Status = VirtioNetInitRing (Dev, VIRTIO_NET_Q_TX, &Dev->TxRing);\r | |
464 | if (EFI_ERROR (Status)) {\r | |
465 | goto ReleaseRxRing;\r | |
466 | }\r | |
467 | \r | |
468 | //\r | |
469 | // step 5 -- keep only the features we want\r | |
470 | //\r | |
33c6b934 LE |
471 | if (Dev->VirtIo->Revision < VIRTIO_SPEC_REVISION (1, 0, 0)) {\r |
472 | Features &= ~(UINT64)VIRTIO_F_VERSION_1;\r | |
473 | Status = Dev->VirtIo->SetGuestFeatures (Dev->VirtIo, Features);\r | |
474 | if (EFI_ERROR (Status)) {\r | |
475 | goto ReleaseTxRing;\r | |
476 | }\r | |
12384f9b LE |
477 | }\r |
478 | \r | |
479 | //\r | |
480 | // step 6 -- virtio-net initialization complete\r | |
481 | //\r | |
482 | NextDevStat |= VSTAT_DRIVER_OK;\r | |
56f65ed8 | 483 | Status = Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, NextDevStat);\r |
12384f9b LE |
484 | if (EFI_ERROR (Status)) {\r |
485 | goto ReleaseTxRing;\r | |
486 | }\r | |
487 | \r | |
488 | Status = VirtioNetInitTx (Dev);\r | |
489 | if (EFI_ERROR (Status)) {\r | |
490 | goto AbortDevice;\r | |
491 | }\r | |
492 | \r | |
493 | //\r | |
494 | // start receiving\r | |
495 | //\r | |
496 | Status = VirtioNetInitRx (Dev);\r | |
497 | if (EFI_ERROR (Status)) {\r | |
498 | goto ReleaseTxAux;\r | |
499 | }\r | |
500 | \r | |
501 | Dev->Snm.State = EfiSimpleNetworkInitialized;\r | |
502 | gBS->RestoreTPL (OldTpl);\r | |
503 | return EFI_SUCCESS;\r | |
504 | \r | |
505 | ReleaseTxAux:\r | |
506 | VirtioNetShutdownTx (Dev);\r | |
507 | \r | |
508 | AbortDevice:\r | |
56f65ed8 | 509 | Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0);\r |
12384f9b LE |
510 | \r |
511 | ReleaseTxRing:\r | |
512 | VirtioRingUninit (&Dev->TxRing);\r | |
513 | \r | |
514 | ReleaseRxRing:\r | |
515 | VirtioRingUninit (&Dev->RxRing);\r | |
516 | \r | |
517 | DeviceFailed:\r | |
518 | //\r | |
519 | // restore device status invariant for the EfiSimpleNetworkStarted state\r | |
520 | //\r | |
56f65ed8 | 521 | Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0);\r |
12384f9b LE |
522 | \r |
523 | InitFailed:\r | |
524 | gBS->RestoreTPL (OldTpl);\r | |
525 | return Status;\r | |
526 | }\r |