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1 | /** @file\r |
2 | \r | |
3 | EFI_GRAPHICS_OUTPUT_PROTOCOL member functions for the VirtIo GPU driver.\r | |
4 | \r | |
5 | Copyright (C) 2016, Red Hat, Inc.\r | |
6 | \r | |
7 | This program and the accompanying materials are licensed and made available\r | |
8 | under the terms and conditions of the BSD License which accompanies this\r | |
9 | distribution. The full text of the license may be found at\r | |
10 | http://opensource.org/licenses/bsd-license.php\r | |
11 | \r | |
12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT\r | |
13 | WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
14 | \r | |
15 | **/\r | |
16 | \r | |
17 | #include <Library/BaseMemoryLib.h>\r | |
18 | #include <Library/MemoryAllocationLib.h>\r | |
19 | \r | |
20 | #include "VirtioGpu.h"\r | |
21 | \r | |
22 | /**\r | |
23 | Release guest-side and host-side resources that are related to an initialized\r | |
24 | VGPU_GOP.Gop.\r | |
25 | \r | |
26 | param[in,out] VgpuGop The VGPU_GOP object to release resources for.\r | |
27 | \r | |
28 | On input, the caller is responsible for having called\r | |
29 | VgpuGop->Gop.SetMode() at least once successfully.\r | |
30 | (This is equivalent to the requirement that\r | |
31 | VgpuGop->BackingStore be non-NULL. It is also\r | |
32 | equivalent to the requirement that VgpuGop->ResourceId\r | |
33 | be nonzero.)\r | |
34 | \r | |
35 | On output, resources will be released, and\r | |
36 | VgpuGop->BackingStore and VgpuGop->ResourceId will be\r | |
37 | nulled.\r | |
38 | \r | |
39 | param[in] DisableHead Whether this head (scanout) currently references the\r | |
40 | resource identified by VgpuGop->ResourceId. Only pass\r | |
41 | FALSE when VgpuGop->Gop.SetMode() calls this function\r | |
42 | while switching between modes, and set it to TRUE\r | |
43 | every other time.\r | |
44 | **/\r | |
45 | VOID\r | |
46 | ReleaseGopResources (\r | |
47 | IN OUT VGPU_GOP *VgpuGop,\r | |
48 | IN BOOLEAN DisableHead\r | |
49 | )\r | |
50 | {\r | |
51 | EFI_STATUS Status;\r | |
52 | \r | |
53 | ASSERT (VgpuGop->ResourceId != 0);\r | |
54 | ASSERT (VgpuGop->BackingStore != NULL);\r | |
55 | \r | |
56 | //\r | |
57 | // If any of the following host-side destruction steps fail, we can't get out\r | |
58 | // of an inconsistent state, so we'll hang. In general errors in object\r | |
59 | // destruction can hardly be recovered from.\r | |
60 | //\r | |
61 | if (DisableHead) {\r | |
62 | //\r | |
63 | // Dissociate head (scanout) #0 from the currently used 2D host resource,\r | |
64 | // by setting ResourceId=0 for it.\r | |
65 | //\r | |
66 | Status = VirtioGpuSetScanout (\r | |
67 | VgpuGop->ParentBus, // VgpuDev\r | |
68 | 0, 0, 0, 0, // X, Y, Width, Height\r | |
69 | 0, // ScanoutId\r | |
70 | 0 // ResourceId\r | |
71 | );\r | |
72 | //\r | |
73 | // HACK BEGINS HERE\r | |
74 | //\r | |
75 | // According to the GPU Device section of the VirtIo specification, the\r | |
76 | // above operation is valid:\r | |
77 | //\r | |
78 | // "The driver can use resource_id = 0 to disable a scanout."\r | |
79 | //\r | |
80 | // However, in practice QEMU does not allow us to disable head (scanout) #0\r | |
81 | // -- it rejects the command with response code 0x1202\r | |
82 | // (VIRTIO_GPU_RESP_ERR_INVALID_SCANOUT_ID). Looking at the QEMU source\r | |
83 | // code, function virtio_gpu_set_scanout() in "hw/display/virtio-gpu.c",\r | |
84 | // this appears fully intentional, despite not being documented in the\r | |
85 | // spec.\r | |
86 | //\r | |
87 | // Surprisingly, ignoring the error here, and proceeding to release\r | |
88 | // host-side resources that presumably underlie head (scanout) #0, work\r | |
89 | // without any problems -- the driver survives repeated "disconnect" /\r | |
90 | // "connect -r" commands in the UEFI shell.\r | |
91 | //\r | |
92 | // So, for now, let's just suppress the error.\r | |
93 | //\r | |
94 | Status = EFI_SUCCESS;\r | |
95 | //\r | |
96 | // HACK ENDS HERE\r | |
97 | //\r | |
98 | \r | |
99 | ASSERT_EFI_ERROR (Status);\r | |
100 | if (EFI_ERROR (Status)) {\r | |
101 | CpuDeadLoop ();\r | |
102 | }\r | |
103 | }\r | |
104 | \r | |
105 | //\r | |
106 | // Detach backing pages from the currently used 2D host resource.\r | |
107 | //\r | |
108 | Status = VirtioGpuResourceDetachBacking (\r | |
109 | VgpuGop->ParentBus, // VgpuDev\r | |
110 | VgpuGop->ResourceId // ResourceId\r | |
111 | );\r | |
112 | ASSERT_EFI_ERROR (Status);\r | |
113 | if (EFI_ERROR (Status)) {\r | |
114 | CpuDeadLoop ();\r | |
115 | }\r | |
116 | \r | |
117 | //\r | |
118 | // Release backing pages.\r | |
119 | //\r | |
120 | FreePages (VgpuGop->BackingStore, VgpuGop->NumberOfPages);\r | |
121 | VgpuGop->BackingStore = NULL;\r | |
122 | VgpuGop->NumberOfPages = 0;\r | |
123 | \r | |
124 | //\r | |
125 | // Destroy the currently used 2D host resource.\r | |
126 | //\r | |
127 | Status = VirtioGpuResourceUnref (\r | |
128 | VgpuGop->ParentBus, // VgpuDev\r | |
129 | VgpuGop->ResourceId // ResourceId\r | |
130 | );\r | |
131 | ASSERT_EFI_ERROR (Status);\r | |
132 | if (EFI_ERROR (Status)) {\r | |
133 | CpuDeadLoop ();\r | |
134 | }\r | |
135 | VgpuGop->ResourceId = 0;\r | |
136 | }\r | |
137 | \r | |
138 | //\r | |
139 | // The resolutions supported by this driver.\r | |
140 | //\r | |
141 | typedef struct {\r | |
142 | UINT32 Width;\r | |
143 | UINT32 Height;\r | |
144 | } GOP_RESOLUTION;\r | |
145 | \r | |
146 | STATIC CONST GOP_RESOLUTION mGopResolutions[] = {\r | |
147 | { 640, 480 },\r | |
148 | { 800, 480 },\r | |
149 | { 800, 600 },\r | |
150 | { 832, 624 },\r | |
151 | { 960, 640 },\r | |
152 | { 1024, 600 },\r | |
153 | { 1024, 768 },\r | |
154 | { 1152, 864 },\r | |
155 | { 1152, 870 },\r | |
156 | { 1280, 720 },\r | |
157 | { 1280, 760 },\r | |
158 | { 1280, 768 },\r | |
159 | { 1280, 800 },\r | |
160 | { 1280, 960 },\r | |
161 | { 1280, 1024 },\r | |
162 | { 1360, 768 },\r | |
163 | { 1366, 768 },\r | |
164 | { 1400, 1050 },\r | |
165 | { 1440, 900 },\r | |
166 | { 1600, 900 },\r | |
167 | { 1600, 1200 },\r | |
168 | { 1680, 1050 },\r | |
169 | { 1920, 1080 },\r | |
170 | { 1920, 1200 },\r | |
171 | { 1920, 1440 },\r | |
172 | { 2000, 2000 },\r | |
173 | { 2048, 1536 },\r | |
174 | { 2048, 2048 },\r | |
175 | { 2560, 1440 },\r | |
176 | { 2560, 1600 },\r | |
177 | { 2560, 2048 },\r | |
178 | { 2800, 2100 },\r | |
179 | { 3200, 2400 },\r | |
180 | { 3840, 2160 },\r | |
181 | { 4096, 2160 },\r | |
182 | { 7680, 4320 },\r | |
183 | { 8192, 4320 },\r | |
184 | };\r | |
185 | \r | |
186 | //\r | |
187 | // Macro for casting VGPU_GOP.Gop to VGPU_GOP.\r | |
188 | //\r | |
189 | #define VGPU_GOP_FROM_GOP(GopPointer) \\r | |
190 | CR (GopPointer, VGPU_GOP, Gop, VGPU_GOP_SIG)\r | |
191 | \r | |
192 | //\r | |
193 | // EFI_GRAPHICS_OUTPUT_PROTOCOL member functions.\r | |
194 | //\r | |
195 | STATIC\r | |
196 | EFI_STATUS\r | |
197 | EFIAPI\r | |
198 | GopQueryMode (\r | |
199 | IN EFI_GRAPHICS_OUTPUT_PROTOCOL *This,\r | |
200 | IN UINT32 ModeNumber,\r | |
201 | OUT UINTN *SizeOfInfo,\r | |
202 | OUT EFI_GRAPHICS_OUTPUT_MODE_INFORMATION **Info\r | |
203 | )\r | |
204 | {\r | |
205 | EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *GopModeInfo;\r | |
206 | \r | |
5a5025e4 | 207 | if (ModeNumber >= ARRAY_SIZE (mGopResolutions)) {\r |
8731debe LE |
208 | return EFI_INVALID_PARAMETER;\r |
209 | }\r | |
210 | \r | |
211 | GopModeInfo = AllocateZeroPool (sizeof *GopModeInfo);\r | |
212 | if (GopModeInfo == NULL) {\r | |
213 | return EFI_OUT_OF_RESOURCES;\r | |
214 | }\r | |
215 | \r | |
216 | GopModeInfo->HorizontalResolution = mGopResolutions[ModeNumber].Width;\r | |
217 | GopModeInfo->VerticalResolution = mGopResolutions[ModeNumber].Height;\r | |
218 | GopModeInfo->PixelFormat = PixelBltOnly;\r | |
219 | GopModeInfo->PixelsPerScanLine = mGopResolutions[ModeNumber].Width;\r | |
220 | \r | |
221 | *SizeOfInfo = sizeof *GopModeInfo;\r | |
222 | *Info = GopModeInfo;\r | |
223 | return EFI_SUCCESS;\r | |
224 | }\r | |
225 | \r | |
226 | STATIC\r | |
227 | EFI_STATUS\r | |
228 | EFIAPI\r | |
229 | GopSetMode (\r | |
230 | IN EFI_GRAPHICS_OUTPUT_PROTOCOL *This,\r | |
231 | IN UINT32 ModeNumber\r | |
232 | )\r | |
233 | {\r | |
234 | VGPU_GOP *VgpuGop;\r | |
235 | UINT32 NewResourceId;\r | |
236 | UINTN NewNumberOfBytes;\r | |
237 | UINTN NewNumberOfPages;\r | |
238 | VOID *NewBackingStore;\r | |
239 | EFI_STATUS Status;\r | |
240 | EFI_STATUS Status2;\r | |
241 | \r | |
5a5025e4 | 242 | if (ModeNumber >= ARRAY_SIZE (mGopResolutions)) {\r |
8731debe LE |
243 | return EFI_UNSUPPORTED;\r |
244 | }\r | |
245 | \r | |
246 | VgpuGop = VGPU_GOP_FROM_GOP (This);\r | |
247 | \r | |
248 | //\r | |
249 | // Distinguish the first (internal) call from the other (protocol consumer)\r | |
250 | // calls.\r | |
251 | //\r | |
252 | if (VgpuGop->ResourceId == 0) {\r | |
253 | //\r | |
254 | // Set up the Gop -> GopMode -> GopModeInfo pointer chain, and the other\r | |
255 | // (nonzero) constant fields.\r | |
256 | //\r | |
257 | // No direct framebuffer access is supported, only Blt() is.\r | |
258 | //\r | |
259 | VgpuGop->Gop.Mode = &VgpuGop->GopMode;\r | |
260 | \r | |
5a5025e4 | 261 | VgpuGop->GopMode.MaxMode = (UINT32)(ARRAY_SIZE (mGopResolutions));\r |
8731debe LE |
262 | VgpuGop->GopMode.Info = &VgpuGop->GopModeInfo;\r |
263 | VgpuGop->GopMode.SizeOfInfo = sizeof VgpuGop->GopModeInfo;\r | |
264 | \r | |
265 | VgpuGop->GopModeInfo.PixelFormat = PixelBltOnly;\r | |
266 | \r | |
267 | //\r | |
268 | // This is the first time we create a host side resource.\r | |
269 | //\r | |
270 | NewResourceId = 1;\r | |
271 | } else {\r | |
272 | //\r | |
273 | // We already have an active host side resource. Create the new one without\r | |
274 | // interfering with the current one, so that we can cleanly bail out on\r | |
275 | // error, without disturbing the current graphics mode.\r | |
276 | //\r | |
277 | // The formula below will alternate between IDs 1 and 2.\r | |
278 | //\r | |
279 | NewResourceId = 3 - VgpuGop->ResourceId;\r | |
280 | }\r | |
281 | \r | |
282 | //\r | |
283 | // Create the 2D host resource.\r | |
284 | //\r | |
285 | Status = VirtioGpuResourceCreate2d (\r | |
286 | VgpuGop->ParentBus, // VgpuDev\r | |
287 | NewResourceId, // ResourceId\r | |
288 | VirtioGpuFormatB8G8R8X8Unorm, // Format\r | |
289 | mGopResolutions[ModeNumber].Width, // Width\r | |
290 | mGopResolutions[ModeNumber].Height // Height\r | |
291 | );\r | |
292 | if (EFI_ERROR (Status)) {\r | |
293 | return Status;\r | |
294 | }\r | |
295 | \r | |
296 | //\r | |
297 | // Allocate guest backing store.\r | |
298 | //\r | |
299 | NewNumberOfBytes = mGopResolutions[ModeNumber].Width *\r | |
300 | mGopResolutions[ModeNumber].Height * sizeof (UINT32);\r | |
301 | NewNumberOfPages = EFI_SIZE_TO_PAGES (NewNumberOfBytes);\r | |
302 | NewBackingStore = AllocatePages (NewNumberOfPages);\r | |
303 | if (NewBackingStore == NULL) {\r | |
304 | Status = EFI_OUT_OF_RESOURCES;\r | |
305 | goto DestroyHostResource;\r | |
306 | }\r | |
307 | //\r | |
308 | // Fill visible part of backing store with black.\r | |
309 | //\r | |
310 | ZeroMem (NewBackingStore, NewNumberOfBytes);\r | |
311 | \r | |
312 | //\r | |
313 | // Attach backing store to the host resource.\r | |
314 | //\r | |
315 | Status = VirtioGpuResourceAttachBacking (\r | |
316 | VgpuGop->ParentBus, // VgpuDev\r | |
317 | NewResourceId, // ResourceId\r | |
318 | NewBackingStore, // FirstBackingPage\r | |
319 | NewNumberOfPages // NumberOfPages\r | |
320 | );\r | |
321 | if (EFI_ERROR (Status)) {\r | |
322 | goto FreeBackingStore;\r | |
323 | }\r | |
324 | \r | |
325 | //\r | |
326 | // Point head (scanout) #0 to the host resource.\r | |
327 | //\r | |
328 | Status = VirtioGpuSetScanout (\r | |
329 | VgpuGop->ParentBus, // VgpuDev\r | |
330 | 0, // X\r | |
331 | 0, // Y\r | |
332 | mGopResolutions[ModeNumber].Width, // Width\r | |
333 | mGopResolutions[ModeNumber].Height, // Height\r | |
334 | 0, // ScanoutId\r | |
335 | NewResourceId // ResourceId\r | |
336 | );\r | |
337 | if (EFI_ERROR (Status)) {\r | |
338 | goto DetachBackingStore;\r | |
339 | }\r | |
340 | \r | |
341 | //\r | |
342 | // If this is not the first (i.e., internal) call, then we have to (a) flush\r | |
343 | // the new resource to head (scanout) #0, after having flipped the latter to\r | |
344 | // the former above, plus (b) release the old resources.\r | |
345 | //\r | |
346 | if (VgpuGop->ResourceId != 0) {\r | |
347 | Status = VirtioGpuResourceFlush (\r | |
348 | VgpuGop->ParentBus, // VgpuDev\r | |
349 | 0, // X\r | |
350 | 0, // Y\r | |
351 | mGopResolutions[ModeNumber].Width, // Width\r | |
352 | mGopResolutions[ModeNumber].Height, // Height\r | |
353 | NewResourceId // ResourceId\r | |
354 | );\r | |
355 | if (EFI_ERROR (Status)) {\r | |
356 | //\r | |
357 | // Flip head (scanout) #0 back to the current resource. If this fails, we\r | |
358 | // cannot continue, as this error occurs on the error path and is\r | |
359 | // therefore non-recoverable.\r | |
360 | //\r | |
361 | Status2 = VirtioGpuSetScanout (\r | |
362 | VgpuGop->ParentBus, // VgpuDev\r | |
363 | 0, // X\r | |
364 | 0, // Y\r | |
365 | mGopResolutions[This->Mode->Mode].Width, // Width\r | |
366 | mGopResolutions[This->Mode->Mode].Height, // Height\r | |
367 | 0, // ScanoutId\r | |
368 | VgpuGop->ResourceId // ResourceId\r | |
369 | );\r | |
370 | ASSERT_EFI_ERROR (Status2);\r | |
371 | if (EFI_ERROR (Status2)) {\r | |
372 | CpuDeadLoop ();\r | |
373 | }\r | |
374 | goto DetachBackingStore;\r | |
375 | }\r | |
376 | \r | |
377 | //\r | |
378 | // Flush successful; release the old resources (without disabling head\r | |
379 | // (scanout) #0).\r | |
380 | //\r | |
381 | ReleaseGopResources (VgpuGop, FALSE /* DisableHead */);\r | |
382 | }\r | |
383 | \r | |
384 | //\r | |
385 | // This is either the first (internal) call when we have no old resources\r | |
386 | // yet, or we've changed the mode successfully and released the old\r | |
387 | // resources.\r | |
388 | //\r | |
389 | ASSERT (VgpuGop->ResourceId == 0);\r | |
390 | ASSERT (VgpuGop->BackingStore == NULL);\r | |
391 | \r | |
392 | VgpuGop->ResourceId = NewResourceId;\r | |
393 | VgpuGop->BackingStore = NewBackingStore;\r | |
394 | VgpuGop->NumberOfPages = NewNumberOfPages;\r | |
395 | \r | |
396 | //\r | |
397 | // Populate Mode and ModeInfo (mutable fields only).\r | |
398 | //\r | |
399 | VgpuGop->GopMode.Mode = ModeNumber;\r | |
400 | VgpuGop->GopModeInfo.HorizontalResolution =\r | |
401 | mGopResolutions[ModeNumber].Width;\r | |
402 | VgpuGop->GopModeInfo.VerticalResolution = mGopResolutions[ModeNumber].Height;\r | |
403 | VgpuGop->GopModeInfo.PixelsPerScanLine = mGopResolutions[ModeNumber].Width;\r | |
404 | return EFI_SUCCESS;\r | |
405 | \r | |
406 | DetachBackingStore:\r | |
407 | Status2 = VirtioGpuResourceDetachBacking (VgpuGop->ParentBus, NewResourceId);\r | |
408 | ASSERT_EFI_ERROR (Status2);\r | |
409 | if (EFI_ERROR (Status2)) {\r | |
410 | CpuDeadLoop ();\r | |
411 | }\r | |
412 | \r | |
413 | FreeBackingStore:\r | |
414 | FreePages (NewBackingStore, NewNumberOfPages);\r | |
415 | \r | |
416 | DestroyHostResource:\r | |
417 | Status2 = VirtioGpuResourceUnref (VgpuGop->ParentBus, NewResourceId);\r | |
418 | ASSERT_EFI_ERROR (Status2);\r | |
419 | if (EFI_ERROR (Status2)) {\r | |
420 | CpuDeadLoop ();\r | |
421 | }\r | |
422 | \r | |
423 | return Status;\r | |
424 | }\r | |
425 | \r | |
426 | STATIC\r | |
427 | EFI_STATUS\r | |
428 | EFIAPI\r | |
429 | GopBlt (\r | |
430 | IN EFI_GRAPHICS_OUTPUT_PROTOCOL *This,\r | |
431 | IN EFI_GRAPHICS_OUTPUT_BLT_PIXEL *BltBuffer, OPTIONAL\r | |
432 | IN EFI_GRAPHICS_OUTPUT_BLT_OPERATION BltOperation,\r | |
433 | IN UINTN SourceX,\r | |
434 | IN UINTN SourceY,\r | |
435 | IN UINTN DestinationX,\r | |
436 | IN UINTN DestinationY,\r | |
437 | IN UINTN Width,\r | |
438 | IN UINTN Height,\r | |
439 | IN UINTN Delta OPTIONAL\r | |
440 | )\r | |
441 | {\r | |
442 | VGPU_GOP *VgpuGop;\r | |
443 | UINT32 CurrentHorizontal;\r | |
444 | UINT32 CurrentVertical;\r | |
445 | UINTN SegmentSize;\r | |
446 | UINTN Y;\r | |
447 | UINTN ResourceOffset;\r | |
448 | EFI_STATUS Status;\r | |
449 | \r | |
450 | VgpuGop = VGPU_GOP_FROM_GOP (This);\r | |
451 | CurrentHorizontal = VgpuGop->GopModeInfo.HorizontalResolution;\r | |
452 | CurrentVertical = VgpuGop->GopModeInfo.VerticalResolution;\r | |
453 | \r | |
454 | //\r | |
455 | // We can avoid pixel format conversion in the guest because the internal\r | |
456 | // representation of EFI_GRAPHICS_OUTPUT_BLT_PIXEL and that of\r | |
457 | // VirtioGpuFormatB8G8R8X8Unorm are identical.\r | |
458 | //\r | |
459 | SegmentSize = Width * sizeof (UINT32);\r | |
460 | \r | |
461 | //\r | |
462 | // Delta is relevant for operations that read a rectangle from, or write a\r | |
463 | // rectangle to, BltBuffer.\r | |
464 | //\r | |
465 | // In these cases, Delta is the stride of BltBuffer, in bytes. If Delta is\r | |
466 | // zero, then Width is the entire width of BltBuffer, and the stride is\r | |
467 | // supposed to be calculated from Width.\r | |
468 | //\r | |
469 | if (BltOperation == EfiBltVideoToBltBuffer ||\r | |
470 | BltOperation == EfiBltBufferToVideo) {\r | |
471 | if (Delta == 0) {\r | |
472 | Delta = SegmentSize;\r | |
473 | }\r | |
474 | }\r | |
475 | \r | |
476 | //\r | |
477 | // For operations that write to the display, check if the destination fits\r | |
478 | // onto the display.\r | |
479 | //\r | |
480 | if (BltOperation == EfiBltVideoFill ||\r | |
481 | BltOperation == EfiBltBufferToVideo ||\r | |
482 | BltOperation == EfiBltVideoToVideo) {\r | |
483 | if (DestinationX > CurrentHorizontal ||\r | |
484 | Width > CurrentHorizontal - DestinationX ||\r | |
485 | DestinationY > CurrentVertical ||\r | |
486 | Height > CurrentVertical - DestinationY) {\r | |
487 | return EFI_INVALID_PARAMETER;\r | |
488 | }\r | |
489 | }\r | |
490 | \r | |
491 | //\r | |
492 | // For operations that read from the display, check if the source fits onto\r | |
493 | // the display.\r | |
494 | //\r | |
495 | if (BltOperation == EfiBltVideoToBltBuffer ||\r | |
496 | BltOperation == EfiBltVideoToVideo) {\r | |
497 | if (SourceX > CurrentHorizontal ||\r | |
498 | Width > CurrentHorizontal - SourceX ||\r | |
499 | SourceY > CurrentVertical ||\r | |
500 | Height > CurrentVertical - SourceY) {\r | |
501 | return EFI_INVALID_PARAMETER;\r | |
502 | }\r | |
503 | }\r | |
504 | \r | |
505 | //\r | |
506 | // Render the request. For requests that do not modify the display, there\r | |
507 | // won't be further steps.\r | |
508 | //\r | |
509 | switch (BltOperation) {\r | |
510 | case EfiBltVideoFill:\r | |
511 | //\r | |
512 | // Write data from the BltBuffer pixel (0, 0) directly to every pixel of\r | |
513 | // the video display rectangle (DestinationX, DestinationY) (DestinationX +\r | |
514 | // Width, DestinationY + Height). Only one pixel will be used from the\r | |
515 | // BltBuffer. Delta is NOT used.\r | |
516 | //\r | |
517 | for (Y = 0; Y < Height; ++Y) {\r | |
518 | SetMem32 (\r | |
519 | VgpuGop->BackingStore +\r | |
520 | (DestinationY + Y) * CurrentHorizontal + DestinationX,\r | |
521 | SegmentSize,\r | |
522 | *(UINT32 *)BltBuffer\r | |
523 | );\r | |
524 | }\r | |
525 | break;\r | |
526 | \r | |
527 | case EfiBltVideoToBltBuffer:\r | |
528 | //\r | |
529 | // Read data from the video display rectangle (SourceX, SourceY) (SourceX +\r | |
530 | // Width, SourceY + Height) and place it in the BltBuffer rectangle\r | |
531 | // (DestinationX, DestinationY ) (DestinationX + Width, DestinationY +\r | |
532 | // Height). If DestinationX or DestinationY is not zero then Delta must be\r | |
533 | // set to the length in bytes of a row in the BltBuffer.\r | |
534 | //\r | |
535 | for (Y = 0; Y < Height; ++Y) {\r | |
536 | CopyMem (\r | |
537 | (UINT8 *)BltBuffer +\r | |
538 | (DestinationY + Y) * Delta + DestinationX * sizeof *BltBuffer,\r | |
539 | VgpuGop->BackingStore +\r | |
540 | (SourceY + Y) * CurrentHorizontal + SourceX,\r | |
541 | SegmentSize\r | |
542 | );\r | |
543 | }\r | |
544 | return EFI_SUCCESS;\r | |
545 | \r | |
546 | case EfiBltBufferToVideo:\r | |
547 | //\r | |
548 | // Write data from the BltBuffer rectangle (SourceX, SourceY) (SourceX +\r | |
549 | // Width, SourceY + Height) directly to the video display rectangle\r | |
550 | // (DestinationX, DestinationY) (DestinationX + Width, DestinationY +\r | |
551 | // Height). If SourceX or SourceY is not zero then Delta must be set to the\r | |
552 | // length in bytes of a row in the BltBuffer.\r | |
553 | //\r | |
554 | for (Y = 0; Y < Height; ++Y) {\r | |
555 | CopyMem (\r | |
556 | VgpuGop->BackingStore +\r | |
557 | (DestinationY + Y) * CurrentHorizontal + DestinationX,\r | |
558 | (UINT8 *)BltBuffer +\r | |
559 | (SourceY + Y) * Delta + SourceX * sizeof *BltBuffer,\r | |
560 | SegmentSize\r | |
561 | );\r | |
562 | }\r | |
563 | break;\r | |
564 | \r | |
565 | case EfiBltVideoToVideo:\r | |
566 | //\r | |
567 | // Copy from the video display rectangle (SourceX, SourceY) (SourceX +\r | |
568 | // Width, SourceY + Height) to the video display rectangle (DestinationX,\r | |
569 | // DestinationY) (DestinationX + Width, DestinationY + Height). The\r | |
570 | // BltBuffer and Delta are not used in this mode.\r | |
571 | //\r | |
572 | // A single invocation of CopyMem() handles overlap between source and\r | |
573 | // destination (that is, within a single line), but for multiple\r | |
574 | // invocations, we must handle overlaps.\r | |
575 | //\r | |
576 | if (SourceY < DestinationY) {\r | |
577 | Y = Height;\r | |
578 | while (Y > 0) {\r | |
579 | --Y;\r | |
580 | CopyMem (\r | |
581 | VgpuGop->BackingStore +\r | |
582 | (DestinationY + Y) * CurrentHorizontal + DestinationX,\r | |
583 | VgpuGop->BackingStore +\r | |
584 | (SourceY + Y) * CurrentHorizontal + SourceX,\r | |
585 | SegmentSize\r | |
586 | );\r | |
587 | }\r | |
588 | } else {\r | |
589 | for (Y = 0; Y < Height; ++Y) {\r | |
590 | CopyMem (\r | |
591 | VgpuGop->BackingStore +\r | |
592 | (DestinationY + Y) * CurrentHorizontal + DestinationX,\r | |
593 | VgpuGop->BackingStore +\r | |
594 | (SourceY + Y) * CurrentHorizontal + SourceX,\r | |
595 | SegmentSize\r | |
596 | );\r | |
597 | }\r | |
598 | }\r | |
599 | break;\r | |
600 | \r | |
601 | default:\r | |
602 | return EFI_INVALID_PARAMETER;\r | |
603 | }\r | |
604 | \r | |
605 | //\r | |
606 | // For operations that wrote to the display, submit the updated area to the\r | |
607 | // host -- update the host resource from guest memory.\r | |
608 | //\r | |
609 | ResourceOffset = sizeof (UINT32) * (DestinationY * CurrentHorizontal +\r | |
610 | DestinationX);\r | |
611 | Status = VirtioGpuTransferToHost2d (\r | |
612 | VgpuGop->ParentBus, // VgpuDev\r | |
613 | (UINT32)DestinationX, // X\r | |
614 | (UINT32)DestinationY, // Y\r | |
615 | (UINT32)Width, // Width\r | |
616 | (UINT32)Height, // Height\r | |
617 | ResourceOffset, // Offset\r | |
618 | VgpuGop->ResourceId // ResourceId\r | |
619 | );\r | |
620 | if (EFI_ERROR (Status)) {\r | |
621 | return Status;\r | |
622 | }\r | |
623 | \r | |
624 | //\r | |
625 | // Flush the updated resource to the display.\r | |
626 | //\r | |
627 | Status = VirtioGpuResourceFlush (\r | |
628 | VgpuGop->ParentBus, // VgpuDev\r | |
629 | (UINT32)DestinationX, // X\r | |
630 | (UINT32)DestinationY, // Y\r | |
631 | (UINT32)Width, // Width\r | |
632 | (UINT32)Height, // Height\r | |
633 | VgpuGop->ResourceId // ResourceId\r | |
634 | );\r | |
635 | return Status;\r | |
636 | }\r | |
637 | \r | |
638 | //\r | |
639 | // Template for initializing VGPU_GOP.Gop.\r | |
640 | //\r | |
641 | CONST EFI_GRAPHICS_OUTPUT_PROTOCOL mGopTemplate = {\r | |
642 | GopQueryMode,\r | |
643 | GopSetMode,\r | |
644 | GopBlt,\r | |
645 | NULL // Mode, to be overwritten in the actual protocol instance\r | |
646 | };\r |