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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 | |
fc2c1543 | 8 | Copyright (c) 2017, AMD Inc, All rights reserved.<BR>\r |
12384f9b LE |
9 | \r |
10 | This program and the accompanying materials are licensed and made available\r | |
11 | under the terms and conditions of the BSD License which accompanies this\r | |
12 | distribution. The full text of the license may be found at\r | |
13 | http://opensource.org/licenses/bsd-license.php\r | |
14 | \r | |
15 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT\r | |
16 | WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
17 | \r | |
18 | **/\r | |
19 | \r | |
20 | #include <Library/BaseLib.h>\r | |
21 | #include <Library/MemoryAllocationLib.h>\r | |
22 | #include <Library/UefiBootServicesTableLib.h>\r | |
23 | \r | |
24 | #include "VirtioNet.h"\r | |
25 | \r | |
26 | /**\r | |
27 | Initialize a virtio ring for a specific transfer direction of the virtio-net\r | |
28 | device.\r | |
29 | \r | |
30 | This function may only be called by VirtioNetInitialize().\r | |
31 | \r | |
32 | @param[in,out] Dev The VNET_DEV driver instance about to enter the\r | |
33 | EfiSimpleNetworkInitialized state.\r | |
34 | @param[in] Selector Identifies the transfer direction (virtio queue) of\r | |
35 | the network device.\r | |
36 | @param[out] Ring The virtio-ring inside the VNET_DEV structure,\r | |
37 | corresponding to Selector.\r | |
38 | \r | |
39 | @retval EFI_UNSUPPORTED The queue size reported by the virtio-net device is\r | |
40 | too small.\r | |
41 | @return Status codes from VIRTIO_CFG_WRITE(),\r | |
42 | VIRTIO_CFG_READ() and VirtioRingInit().\r | |
43 | @retval EFI_SUCCESS Ring initialized.\r | |
44 | */\r | |
45 | \r | |
46 | STATIC\r | |
47 | EFI_STATUS\r | |
48 | EFIAPI\r | |
49 | VirtioNetInitRing (\r | |
50 | IN OUT VNET_DEV *Dev,\r | |
51 | IN UINT16 Selector,\r | |
52 | OUT VRING *Ring\r | |
53 | )\r | |
54 | {\r | |
55 | EFI_STATUS Status;\r | |
56 | UINT16 QueueSize;\r | |
57 | \r | |
58 | //\r | |
59 | // step 4b -- allocate selected queue\r | |
60 | //\r | |
56f65ed8 | 61 | Status = Dev->VirtIo->SetQueueSel (Dev->VirtIo, Selector);\r |
12384f9b LE |
62 | if (EFI_ERROR (Status)) {\r |
63 | return Status;\r | |
64 | }\r | |
56f65ed8 | 65 | Status = Dev->VirtIo->GetQueueNumMax (Dev->VirtIo, &QueueSize);\r |
12384f9b LE |
66 | if (EFI_ERROR (Status)) {\r |
67 | return Status;\r | |
68 | }\r | |
56f65ed8 | 69 | \r |
12384f9b LE |
70 | //\r |
71 | // For each packet (RX and TX alike), we need two descriptors:\r | |
72 | // one for the virtio-net request header, and another one for the data\r | |
73 | //\r | |
74 | if (QueueSize < 2) {\r | |
75 | return EFI_UNSUPPORTED;\r | |
76 | }\r | |
fc2c1543 | 77 | Status = VirtioRingInit (Dev->VirtIo, QueueSize, Ring);\r |
12384f9b LE |
78 | if (EFI_ERROR (Status)) {\r |
79 | return Status;\r | |
80 | }\r | |
81 | \r | |
56f65ed8 OM |
82 | //\r |
83 | // Additional steps for MMIO: align the queue appropriately, and set the\r | |
84 | // size. If anything fails from here on, we must release the ring resources.\r | |
85 | //\r | |
86 | Status = Dev->VirtIo->SetQueueNum (Dev->VirtIo, QueueSize);\r | |
87 | if (EFI_ERROR (Status)) {\r | |
88 | goto ReleaseQueue;\r | |
89 | }\r | |
90 | \r | |
91 | Status = Dev->VirtIo->SetQueueAlign (Dev->VirtIo, EFI_PAGE_SIZE);\r | |
92 | if (EFI_ERROR (Status)) {\r | |
93 | goto ReleaseQueue;\r | |
94 | }\r | |
95 | \r | |
12384f9b LE |
96 | //\r |
97 | // step 4c -- report GPFN (guest-physical frame number) of queue\r | |
98 | //\r | |
53a4c604 | 99 | Status = Dev->VirtIo->SetQueueAddress (Dev->VirtIo, Ring, 0);\r |
12384f9b | 100 | if (EFI_ERROR (Status)) {\r |
56f65ed8 | 101 | goto ReleaseQueue;\r |
12384f9b | 102 | }\r |
56f65ed8 OM |
103 | \r |
104 | return EFI_SUCCESS;\r | |
105 | \r | |
106 | ReleaseQueue:\r | |
fc2c1543 | 107 | VirtioRingUninit (Dev->VirtIo, Ring);\r |
56f65ed8 | 108 | \r |
12384f9b LE |
109 | return Status;\r |
110 | }\r | |
111 | \r | |
112 | \r | |
113 | /**\r | |
114 | Set up static scaffolding for the VirtioNetTransmit() and\r | |
115 | VirtioNetGetStatus() SNP methods.\r | |
116 | \r | |
117 | This function may only be called by VirtioNetInitialize().\r | |
118 | \r | |
119 | The structures laid out and resources configured include:\r | |
120 | - fully populate the TX queue with a static pattern of virtio descriptor\r | |
121 | chains,\r | |
122 | - tracking of heads of free descriptor chains from the above,\r | |
123 | - one common virtio-net request header (never modified by the host) for all\r | |
124 | pending TX packets,\r | |
125 | - select polling over TX interrupt.\r | |
126 | \r | |
127 | @param[in,out] Dev The VNET_DEV driver instance about to enter the\r | |
128 | EfiSimpleNetworkInitialized state.\r | |
129 | \r | |
130 | @retval EFI_OUT_OF_RESOURCES Failed to allocate the stack to track the heads\r | |
131 | of free descriptor chains.\r | |
132 | @retval EFI_SUCCESS TX setup successful.\r | |
133 | */\r | |
134 | \r | |
135 | STATIC\r | |
136 | EFI_STATUS\r | |
137 | EFIAPI\r | |
138 | VirtioNetInitTx (\r | |
139 | IN OUT VNET_DEV *Dev\r | |
140 | )\r | |
141 | {\r | |
c6e2d064 | 142 | UINTN TxSharedReqSize;\r |
12384f9b LE |
143 | UINTN PktIdx;\r |
144 | \r | |
9f3acbb5 LE |
145 | Dev->TxMaxPending = (UINT16) MIN (Dev->TxRing.QueueSize / 2,\r |
146 | VNET_MAX_PENDING);\r | |
12384f9b LE |
147 | Dev->TxCurPending = 0;\r |
148 | Dev->TxFreeStack = AllocatePool (Dev->TxMaxPending *\r | |
149 | sizeof *Dev->TxFreeStack);\r | |
150 | if (Dev->TxFreeStack == NULL) {\r | |
151 | return EFI_OUT_OF_RESOURCES;\r | |
152 | }\r | |
153 | \r | |
c6e2d064 LE |
154 | //\r |
155 | // In VirtIo 1.0, the NumBuffers field is mandatory. In 0.9.5, it depends on\r | |
156 | // VIRTIO_NET_F_MRG_RXBUF, which we never negotiate.\r | |
157 | //\r | |
158 | TxSharedReqSize = (Dev->VirtIo->Revision < VIRTIO_SPEC_REVISION (1, 0, 0)) ?\r | |
159 | sizeof Dev->TxSharedReq.V0_9_5 :\r | |
160 | sizeof Dev->TxSharedReq;\r | |
161 | \r | |
12384f9b LE |
162 | for (PktIdx = 0; PktIdx < Dev->TxMaxPending; ++PktIdx) {\r |
163 | UINT16 DescIdx;\r | |
164 | \r | |
165 | DescIdx = (UINT16) (2 * PktIdx);\r | |
166 | Dev->TxFreeStack[PktIdx] = DescIdx;\r | |
167 | \r | |
168 | //\r | |
169 | // For each possibly pending packet, lay out the descriptor for the common\r | |
170 | // (unmodified by the host) virtio-net request header.\r | |
171 | //\r | |
172 | Dev->TxRing.Desc[DescIdx].Addr = (UINTN) &Dev->TxSharedReq;\r | |
c6e2d064 | 173 | Dev->TxRing.Desc[DescIdx].Len = (UINT32) TxSharedReqSize;\r |
12384f9b | 174 | Dev->TxRing.Desc[DescIdx].Flags = VRING_DESC_F_NEXT;\r |
9f3acbb5 | 175 | Dev->TxRing.Desc[DescIdx].Next = (UINT16) (DescIdx + 1);\r |
12384f9b LE |
176 | \r |
177 | //\r | |
178 | // The second descriptor of each pending TX packet is updated on the fly,\r | |
179 | // but it always terminates the descriptor chain of the packet.\r | |
180 | //\r | |
181 | Dev->TxRing.Desc[DescIdx + 1].Flags = 0;\r | |
182 | }\r | |
183 | \r | |
184 | //\r | |
185 | // virtio-0.9.5, Appendix C, Packet Transmission\r | |
186 | //\r | |
c6e2d064 LE |
187 | Dev->TxSharedReq.V0_9_5.Flags = 0;\r |
188 | Dev->TxSharedReq.V0_9_5.GsoType = VIRTIO_NET_HDR_GSO_NONE;\r | |
189 | \r | |
190 | //\r | |
191 | // For VirtIo 1.0 only -- the field exists, but it is unused\r | |
192 | //\r | |
193 | Dev->TxSharedReq.NumBuffers = 0;\r | |
12384f9b LE |
194 | \r |
195 | //\r | |
196 | // virtio-0.9.5, 2.4.2 Receiving Used Buffers From the Device\r | |
197 | //\r | |
198 | MemoryFence ();\r | |
199 | Dev->TxLastUsed = *Dev->TxRing.Used.Idx;\r | |
200 | ASSERT (Dev->TxLastUsed == 0);\r | |
201 | \r | |
202 | //\r | |
203 | // want no interrupt when a transmit completes\r | |
204 | //\r | |
205 | *Dev->TxRing.Avail.Flags = (UINT16) VRING_AVAIL_F_NO_INTERRUPT;\r | |
206 | \r | |
207 | return EFI_SUCCESS;\r | |
208 | }\r | |
209 | \r | |
210 | \r | |
211 | /**\r | |
212 | Set up static scaffolding for the VirtioNetReceive() SNP method and enable\r | |
213 | live device operation.\r | |
214 | \r | |
215 | This function may only be called as VirtioNetInitialize()'s final step.\r | |
216 | \r | |
217 | The structures laid out and resources configured include:\r | |
218 | - destination area for the host to write virtio-net request headers and\r | |
219 | packet data into,\r | |
220 | - select polling over RX interrupt,\r | |
221 | - fully populate the RX queue with a static pattern of virtio descriptor\r | |
222 | chains.\r | |
223 | \r | |
224 | @param[in,out] Dev The VNET_DEV driver instance about to enter the\r | |
225 | EfiSimpleNetworkInitialized state.\r | |
226 | \r | |
227 | @retval EFI_OUT_OF_RESOURCES Failed to allocate RX destination area.\r | |
228 | @return Status codes from VIRTIO_CFG_WRITE().\r | |
229 | @retval EFI_SUCCESS RX setup successful. The device is live and may\r | |
230 | already be writing to the receive area.\r | |
231 | */\r | |
232 | \r | |
233 | STATIC\r | |
234 | EFI_STATUS\r | |
235 | EFIAPI\r | |
236 | VirtioNetInitRx (\r | |
237 | IN OUT VNET_DEV *Dev\r | |
238 | )\r | |
239 | {\r | |
240 | EFI_STATUS Status;\r | |
c6e2d064 | 241 | UINTN VirtioNetReqSize;\r |
12384f9b LE |
242 | UINTN RxBufSize;\r |
243 | UINT16 RxAlwaysPending;\r | |
244 | UINTN PktIdx;\r | |
245 | UINT16 DescIdx;\r | |
246 | UINT8 *RxPtr;\r | |
247 | \r | |
c6e2d064 LE |
248 | //\r |
249 | // In VirtIo 1.0, the NumBuffers field is mandatory. In 0.9.5, it depends on\r | |
250 | // VIRTIO_NET_F_MRG_RXBUF, which we never negotiate.\r | |
251 | //\r | |
252 | VirtioNetReqSize = (Dev->VirtIo->Revision < VIRTIO_SPEC_REVISION (1, 0, 0)) ?\r | |
253 | sizeof (VIRTIO_NET_REQ) :\r | |
254 | sizeof (VIRTIO_1_0_NET_REQ);\r | |
255 | \r | |
12384f9b LE |
256 | //\r |
257 | // For each incoming packet we must supply two descriptors:\r | |
258 | // - the recipient for the virtio-net request header, plus\r | |
259 | // - the recipient for the network data (which consists of Ethernet header\r | |
260 | // and Ethernet payload).\r | |
261 | //\r | |
c6e2d064 | 262 | RxBufSize = VirtioNetReqSize +\r |
12384f9b LE |
263 | (Dev->Snm.MediaHeaderSize + Dev->Snm.MaxPacketSize);\r |
264 | \r | |
265 | //\r | |
266 | // Limit the number of pending RX packets if the queue is big. The division\r | |
267 | // by two is due to the above "two descriptors per packet" trait.\r | |
268 | //\r | |
9f3acbb5 | 269 | RxAlwaysPending = (UINT16) MIN (Dev->RxRing.QueueSize / 2, VNET_MAX_PENDING);\r |
12384f9b LE |
270 | \r |
271 | Dev->RxBuf = AllocatePool (RxAlwaysPending * RxBufSize);\r | |
272 | if (Dev->RxBuf == NULL) {\r | |
273 | return EFI_OUT_OF_RESOURCES;\r | |
274 | }\r | |
275 | \r | |
276 | //\r | |
277 | // virtio-0.9.5, 2.4.2 Receiving Used Buffers From the Device\r | |
278 | //\r | |
279 | MemoryFence ();\r | |
280 | Dev->RxLastUsed = *Dev->RxRing.Used.Idx;\r | |
281 | ASSERT (Dev->RxLastUsed == 0);\r | |
282 | \r | |
283 | //\r | |
284 | // virtio-0.9.5, 2.4.2 Receiving Used Buffers From the Device:\r | |
285 | // the host should not send interrupts, we'll poll in VirtioNetReceive()\r | |
286 | // and VirtioNetIsPacketAvailable().\r | |
287 | //\r | |
288 | *Dev->RxRing.Avail.Flags = (UINT16) VRING_AVAIL_F_NO_INTERRUPT;\r | |
289 | \r | |
290 | //\r | |
291 | // now set up a separate, two-part descriptor chain for each RX packet, and\r | |
292 | // link each chain into (from) the available ring as well\r | |
293 | //\r | |
294 | DescIdx = 0;\r | |
295 | RxPtr = Dev->RxBuf;\r | |
296 | for (PktIdx = 0; PktIdx < RxAlwaysPending; ++PktIdx) {\r | |
297 | //\r | |
298 | // virtio-0.9.5, 2.4.1.2 Updating the Available Ring\r | |
299 | // invisible to the host until we update the Index Field\r | |
300 | //\r | |
301 | Dev->RxRing.Avail.Ring[PktIdx] = DescIdx;\r | |
302 | \r | |
303 | //\r | |
304 | // virtio-0.9.5, 2.4.1.1 Placing Buffers into the Descriptor Table\r | |
305 | //\r | |
306 | Dev->RxRing.Desc[DescIdx].Addr = (UINTN) RxPtr;\r | |
c6e2d064 | 307 | Dev->RxRing.Desc[DescIdx].Len = (UINT32) VirtioNetReqSize;\r |
12384f9b | 308 | Dev->RxRing.Desc[DescIdx].Flags = VRING_DESC_F_WRITE | VRING_DESC_F_NEXT;\r |
9f3acbb5 | 309 | Dev->RxRing.Desc[DescIdx].Next = (UINT16) (DescIdx + 1);\r |
12384f9b LE |
310 | RxPtr += Dev->RxRing.Desc[DescIdx++].Len;\r |
311 | \r | |
312 | Dev->RxRing.Desc[DescIdx].Addr = (UINTN) RxPtr;\r | |
c6e2d064 | 313 | Dev->RxRing.Desc[DescIdx].Len = (UINT32) (RxBufSize - VirtioNetReqSize);\r |
12384f9b LE |
314 | Dev->RxRing.Desc[DescIdx].Flags = VRING_DESC_F_WRITE;\r |
315 | RxPtr += Dev->RxRing.Desc[DescIdx++].Len;\r | |
316 | }\r | |
317 | \r | |
318 | //\r | |
319 | // virtio-0.9.5, 2.4.1.3 Updating the Index Field\r | |
320 | //\r | |
321 | MemoryFence ();\r | |
322 | *Dev->RxRing.Avail.Idx = RxAlwaysPending;\r | |
323 | \r | |
324 | //\r | |
325 | // At this point reception may already be running. In order to make it sure,\r | |
326 | // kick the hypervisor. If we fail to kick it, we must first abort reception\r | |
327 | // before tearing down anything, because reception may have been already\r | |
328 | // running even without the kick.\r | |
329 | //\r | |
330 | // virtio-0.9.5, 2.4.1.4 Notifying the Device\r | |
331 | //\r | |
332 | MemoryFence ();\r | |
56f65ed8 | 333 | Status = Dev->VirtIo->SetQueueNotify (Dev->VirtIo, VIRTIO_NET_Q_RX);\r |
12384f9b | 334 | if (EFI_ERROR (Status)) {\r |
56f65ed8 | 335 | Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0);\r |
12384f9b LE |
336 | FreePool (Dev->RxBuf);\r |
337 | }\r | |
338 | \r | |
339 | return Status;\r | |
340 | }\r | |
341 | \r | |
342 | \r | |
343 | /**\r | |
344 | Resets a network adapter and allocates the transmit and receive buffers\r | |
345 | required by the network interface; optionally, also requests allocation of\r | |
346 | additional transmit and receive buffers.\r | |
347 | \r | |
348 | @param This The protocol instance pointer.\r | |
349 | @param ExtraRxBufferSize The size, in bytes, of the extra receive buffer\r | |
350 | space that the driver should allocate for the\r | |
351 | network interface. Some network interfaces will not\r | |
352 | be able to use the extra buffer, and the caller\r | |
353 | will not know if it is actually being used.\r | |
354 | @param ExtraTxBufferSize The size, in bytes, of the extra transmit buffer\r | |
355 | space that the driver should allocate for the\r | |
356 | network interface. Some network interfaces will not\r | |
357 | be able to use the extra buffer, and the caller\r | |
358 | will not know if it is actually being used.\r | |
359 | \r | |
360 | @retval EFI_SUCCESS The network interface was initialized.\r | |
361 | @retval EFI_NOT_STARTED The network interface has not been started.\r | |
362 | @retval EFI_OUT_OF_RESOURCES There was not enough memory for the transmit\r | |
363 | and receive buffers.\r | |
364 | @retval EFI_INVALID_PARAMETER One or more of the parameters has an\r | |
365 | unsupported value.\r | |
366 | @retval EFI_DEVICE_ERROR The command could not be sent to the network\r | |
367 | interface.\r | |
368 | @retval EFI_UNSUPPORTED This function is not supported by the network\r | |
369 | interface.\r | |
370 | \r | |
371 | **/\r | |
372 | \r | |
373 | EFI_STATUS\r | |
374 | EFIAPI\r | |
375 | VirtioNetInitialize (\r | |
376 | IN EFI_SIMPLE_NETWORK_PROTOCOL *This,\r | |
377 | IN UINTN ExtraRxBufferSize OPTIONAL,\r | |
378 | IN UINTN ExtraTxBufferSize OPTIONAL\r | |
379 | )\r | |
380 | {\r | |
381 | VNET_DEV *Dev;\r | |
382 | EFI_TPL OldTpl;\r | |
383 | EFI_STATUS Status;\r | |
384 | UINT8 NextDevStat;\r | |
bc8fde6f | 385 | UINT64 Features;\r |
12384f9b LE |
386 | \r |
387 | if (This == NULL) {\r | |
388 | return EFI_INVALID_PARAMETER;\r | |
389 | }\r | |
390 | if (ExtraRxBufferSize > 0 || ExtraTxBufferSize > 0) {\r | |
391 | return EFI_UNSUPPORTED;\r | |
392 | }\r | |
393 | \r | |
394 | Dev = VIRTIO_NET_FROM_SNP (This);\r | |
395 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r | |
396 | if (Dev->Snm.State != EfiSimpleNetworkStarted) {\r | |
397 | Status = EFI_NOT_STARTED;\r | |
398 | goto InitFailed;\r | |
399 | }\r | |
400 | \r | |
401 | //\r | |
402 | // In the EfiSimpleNetworkStarted state the virtio-net device has status\r | |
403 | // value 0 (= reset) -- see the state diagram, the full call chain to\r | |
404 | // the end of VirtioNetGetFeatures() (considering we're here now),\r | |
405 | // the DeviceFailed label below, and VirtioNetShutdown().\r | |
406 | //\r | |
407 | // Accordingly, the below is a subsequence of the steps found in the\r | |
408 | // virtio-0.9.5 spec, 2.2.1 Device Initialization Sequence.\r | |
409 | //\r | |
410 | NextDevStat = VSTAT_ACK; // step 2 -- acknowledge device presence\r | |
56f65ed8 | 411 | Status = Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, NextDevStat);\r |
12384f9b LE |
412 | if (EFI_ERROR (Status)) {\r |
413 | goto InitFailed;\r | |
414 | }\r | |
415 | \r | |
416 | NextDevStat |= VSTAT_DRIVER; // step 3 -- we know how to drive it\r | |
56f65ed8 OM |
417 | Status = Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, NextDevStat);\r |
418 | if (EFI_ERROR (Status)) {\r | |
419 | goto DeviceFailed;\r | |
420 | }\r | |
421 | \r | |
422 | //\r | |
423 | // Set Page Size - MMIO VirtIo Specific\r | |
424 | //\r | |
425 | Status = Dev->VirtIo->SetPageSize (Dev->VirtIo, EFI_PAGE_SIZE);\r | |
12384f9b LE |
426 | if (EFI_ERROR (Status)) {\r |
427 | goto DeviceFailed;\r | |
428 | }\r | |
429 | \r | |
430 | //\r | |
431 | // step 4a -- retrieve features. Note that we're past validating required\r | |
432 | // features in VirtioNetGetFeatures().\r | |
433 | //\r | |
56f65ed8 | 434 | Status = Dev->VirtIo->GetDeviceFeatures (Dev->VirtIo, &Features);\r |
12384f9b LE |
435 | if (EFI_ERROR (Status)) {\r |
436 | goto DeviceFailed;\r | |
437 | }\r | |
56f65ed8 | 438 | \r |
12384f9b LE |
439 | ASSERT (Features & VIRTIO_NET_F_MAC);\r |
440 | ASSERT (Dev->Snm.MediaPresentSupported ==\r | |
441 | !!(Features & VIRTIO_NET_F_STATUS));\r | |
442 | \r | |
33c6b934 LE |
443 | Features &= VIRTIO_NET_F_MAC | VIRTIO_NET_F_STATUS | VIRTIO_F_VERSION_1;\r |
444 | \r | |
445 | //\r | |
446 | // In virtio-1.0, feature negotiation is expected to complete before queue\r | |
447 | // discovery, and the device can also reject the selected set of features.\r | |
448 | //\r | |
449 | if (Dev->VirtIo->Revision >= VIRTIO_SPEC_REVISION (1, 0, 0)) {\r | |
450 | Status = Virtio10WriteFeatures (Dev->VirtIo, Features, &NextDevStat);\r | |
451 | if (EFI_ERROR (Status)) {\r | |
452 | goto DeviceFailed;\r | |
453 | }\r | |
454 | }\r | |
455 | \r | |
12384f9b LE |
456 | //\r |
457 | // step 4b, 4c -- allocate and report virtqueues\r | |
458 | //\r | |
459 | Status = VirtioNetInitRing (Dev, VIRTIO_NET_Q_RX, &Dev->RxRing);\r | |
460 | if (EFI_ERROR (Status)) {\r | |
461 | goto DeviceFailed;\r | |
462 | }\r | |
463 | \r | |
464 | Status = VirtioNetInitRing (Dev, VIRTIO_NET_Q_TX, &Dev->TxRing);\r | |
465 | if (EFI_ERROR (Status)) {\r | |
466 | goto ReleaseRxRing;\r | |
467 | }\r | |
468 | \r | |
469 | //\r | |
470 | // step 5 -- keep only the features we want\r | |
471 | //\r | |
33c6b934 LE |
472 | if (Dev->VirtIo->Revision < VIRTIO_SPEC_REVISION (1, 0, 0)) {\r |
473 | Features &= ~(UINT64)VIRTIO_F_VERSION_1;\r | |
474 | Status = Dev->VirtIo->SetGuestFeatures (Dev->VirtIo, Features);\r | |
475 | if (EFI_ERROR (Status)) {\r | |
476 | goto ReleaseTxRing;\r | |
477 | }\r | |
12384f9b LE |
478 | }\r |
479 | \r | |
480 | //\r | |
481 | // step 6 -- virtio-net initialization complete\r | |
482 | //\r | |
483 | NextDevStat |= VSTAT_DRIVER_OK;\r | |
56f65ed8 | 484 | Status = Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, NextDevStat);\r |
12384f9b LE |
485 | if (EFI_ERROR (Status)) {\r |
486 | goto ReleaseTxRing;\r | |
487 | }\r | |
488 | \r | |
489 | Status = VirtioNetInitTx (Dev);\r | |
490 | if (EFI_ERROR (Status)) {\r | |
491 | goto AbortDevice;\r | |
492 | }\r | |
493 | \r | |
494 | //\r | |
495 | // start receiving\r | |
496 | //\r | |
497 | Status = VirtioNetInitRx (Dev);\r | |
498 | if (EFI_ERROR (Status)) {\r | |
499 | goto ReleaseTxAux;\r | |
500 | }\r | |
501 | \r | |
502 | Dev->Snm.State = EfiSimpleNetworkInitialized;\r | |
503 | gBS->RestoreTPL (OldTpl);\r | |
504 | return EFI_SUCCESS;\r | |
505 | \r | |
506 | ReleaseTxAux:\r | |
507 | VirtioNetShutdownTx (Dev);\r | |
508 | \r | |
509 | AbortDevice:\r | |
56f65ed8 | 510 | Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0);\r |
12384f9b LE |
511 | \r |
512 | ReleaseTxRing:\r | |
fc2c1543 | 513 | VirtioRingUninit (Dev->VirtIo, &Dev->TxRing);\r |
12384f9b LE |
514 | \r |
515 | ReleaseRxRing:\r | |
fc2c1543 | 516 | VirtioRingUninit (Dev->VirtIo, &Dev->RxRing);\r |
12384f9b LE |
517 | \r |
518 | DeviceFailed:\r | |
519 | //\r | |
520 | // restore device status invariant for the EfiSimpleNetworkStarted state\r | |
521 | //\r | |
56f65ed8 | 522 | Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0);\r |
12384f9b LE |
523 | \r |
524 | InitFailed:\r | |
525 | gBS->RestoreTPL (OldTpl);\r | |
526 | return Status;\r | |
527 | }\r |