]>
Commit | Line | Data |
---|---|---|
d987459f SZ |
1 | /** @file\r |
2 | PEIM to produce gPeiUsb2HostControllerPpiGuid based on gPeiUsbControllerPpiGuid\r | |
3 | which is used to enable recovery function from USB Drivers.\r | |
4 | \r | |
2048c585 | 5 | Copyright (c) 2014 - 2016, Intel Corporation. All rights reserved.<BR>\r |
47ab3970 | 6 | Copyright (C) 2022 Advanced Micro Devices, Inc. All rights reserved.<BR>\r |
d987459f | 7 | \r |
9d510e61 | 8 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
d987459f SZ |
9 | \r |
10 | **/\r | |
11 | \r | |
12 | #include "XhcPeim.h"\r | |
13 | \r | |
14 | /**\r | |
15 | Allocate a block of memory to be used by the buffer pool.\r | |
16 | \r | |
17 | @param Pages How many pages to allocate.\r | |
18 | \r | |
19 | @return Pointer to the allocated memory block or NULL if failed.\r | |
20 | \r | |
21 | **/\r | |
22 | USBHC_MEM_BLOCK *\r | |
23 | UsbHcAllocMemBlock (\r | |
1436aea4 | 24 | IN UINTN Pages\r |
d987459f SZ |
25 | )\r |
26 | {\r | |
27 | USBHC_MEM_BLOCK *Block;\r | |
b575ca32 JY |
28 | VOID *BufHost;\r |
29 | VOID *Mapping;\r | |
30 | EFI_PHYSICAL_ADDRESS MappedAddr;\r | |
d987459f SZ |
31 | EFI_STATUS Status;\r |
32 | UINTN PageNumber;\r | |
33 | EFI_PHYSICAL_ADDRESS TempPtr;\r | |
34 | \r | |
35 | PageNumber = EFI_SIZE_TO_PAGES (sizeof (USBHC_MEM_BLOCK));\r | |
1436aea4 MK |
36 | Status = PeiServicesAllocatePages (\r |
37 | EfiBootServicesData,\r | |
38 | PageNumber,\r | |
39 | &TempPtr\r | |
40 | );\r | |
d987459f SZ |
41 | \r |
42 | if (EFI_ERROR (Status)) {\r | |
43 | return NULL;\r | |
44 | }\r | |
1436aea4 MK |
45 | \r |
46 | ZeroMem ((VOID *)(UINTN)TempPtr, EFI_PAGES_TO_SIZE (PageNumber));\r | |
d987459f SZ |
47 | \r |
48 | //\r | |
49 | // each bit in the bit array represents USBHC_MEM_UNIT\r | |
50 | // bytes of memory in the memory block.\r | |
51 | //\r | |
52 | ASSERT (USBHC_MEM_UNIT * 8 <= EFI_PAGE_SIZE);\r | |
53 | \r | |
1436aea4 MK |
54 | Block = (USBHC_MEM_BLOCK *)(UINTN)TempPtr;\r |
55 | Block->BufLen = EFI_PAGES_TO_SIZE (Pages);\r | |
d987459f SZ |
56 | Block->BitsLen = Block->BufLen / (USBHC_MEM_UNIT * 8);\r |
57 | \r | |
58 | PageNumber = EFI_SIZE_TO_PAGES (Block->BitsLen);\r | |
1436aea4 MK |
59 | Status = PeiServicesAllocatePages (\r |
60 | EfiBootServicesData,\r | |
61 | PageNumber,\r | |
62 | &TempPtr\r | |
63 | );\r | |
d987459f SZ |
64 | \r |
65 | if (EFI_ERROR (Status)) {\r | |
66 | return NULL;\r | |
67 | }\r | |
d987459f | 68 | \r |
1436aea4 MK |
69 | ZeroMem ((VOID *)(UINTN)TempPtr, EFI_PAGES_TO_SIZE (PageNumber));\r |
70 | \r | |
71 | Block->Bits = (UINT8 *)(UINTN)TempPtr;\r | |
d987459f | 72 | \r |
b575ca32 | 73 | Status = IoMmuAllocateBuffer (\r |
d987459f | 74 | Pages,\r |
b575ca32 JY |
75 | &BufHost,\r |
76 | &MappedAddr,\r | |
77 | &Mapping\r | |
d987459f SZ |
78 | );\r |
79 | if (EFI_ERROR (Status)) {\r | |
80 | return NULL;\r | |
81 | }\r | |
d987459f | 82 | \r |
1436aea4 MK |
83 | ZeroMem ((VOID *)(UINTN)BufHost, EFI_PAGES_TO_SIZE (Pages));\r |
84 | \r | |
85 | Block->BufHost = (UINT8 *)(UINTN)BufHost;\r | |
86 | Block->Buf = (UINT8 *)(UINTN)MappedAddr;\r | |
87 | Block->Mapping = Mapping;\r | |
88 | Block->Next = NULL;\r | |
d987459f SZ |
89 | \r |
90 | return Block;\r | |
91 | }\r | |
92 | \r | |
93 | /**\r | |
94 | Free the memory block from the memory pool.\r | |
95 | \r | |
96 | @param Pool The memory pool to free the block from.\r | |
97 | @param Block The memory block to free.\r | |
98 | \r | |
99 | **/\r | |
100 | VOID\r | |
101 | UsbHcFreeMemBlock (\r | |
1436aea4 MK |
102 | IN USBHC_MEM_POOL *Pool,\r |
103 | IN USBHC_MEM_BLOCK *Block\r | |
d987459f SZ |
104 | )\r |
105 | {\r | |
106 | ASSERT ((Pool != NULL) && (Block != NULL));\r | |
b575ca32 JY |
107 | \r |
108 | IoMmuFreeBuffer (EFI_SIZE_TO_PAGES (Block->BufLen), Block->BufHost, Block->Mapping);\r | |
109 | \r | |
d987459f SZ |
110 | //\r |
111 | // No free memory in PEI.\r | |
112 | //\r | |
113 | }\r | |
114 | \r | |
115 | /**\r | |
116 | Alloc some memory from the block.\r | |
117 | \r | |
118 | @param Block The memory block to allocate memory from.\r | |
119 | @param Units Number of memory units to allocate.\r | |
120 | \r | |
121 | @return The pointer to the allocated memory.\r | |
122 | If couldn't allocate the needed memory, the return value is NULL.\r | |
123 | \r | |
124 | **/\r | |
125 | VOID *\r | |
126 | UsbHcAllocMemFromBlock (\r | |
1436aea4 MK |
127 | IN USBHC_MEM_BLOCK *Block,\r |
128 | IN UINTN Units\r | |
d987459f SZ |
129 | )\r |
130 | {\r | |
1436aea4 MK |
131 | UINTN Byte;\r |
132 | UINT8 Bit;\r | |
133 | UINTN StartByte;\r | |
134 | UINT8 StartBit;\r | |
135 | UINTN Available;\r | |
136 | UINTN Count;\r | |
d987459f SZ |
137 | \r |
138 | ASSERT ((Block != 0) && (Units != 0));\r | |
139 | \r | |
1436aea4 MK |
140 | StartByte = 0;\r |
141 | StartBit = 0;\r | |
142 | Available = 0;\r | |
d987459f SZ |
143 | \r |
144 | for (Byte = 0, Bit = 0; Byte < Block->BitsLen;) {\r | |
145 | //\r | |
146 | // If current bit is zero, the corresponding memory unit is\r | |
147 | // available, otherwise we need to restart our searching.\r | |
148 | // Available counts the consective number of zero bit.\r | |
149 | //\r | |
150 | if (!USB_HC_BIT_IS_SET (Block->Bits[Byte], Bit)) {\r | |
151 | Available++;\r | |
152 | \r | |
153 | if (Available >= Units) {\r | |
154 | break;\r | |
155 | }\r | |
156 | \r | |
157 | NEXT_BIT (Byte, Bit);\r | |
158 | } else {\r | |
159 | NEXT_BIT (Byte, Bit);\r | |
160 | \r | |
1436aea4 MK |
161 | Available = 0;\r |
162 | StartByte = Byte;\r | |
163 | StartBit = Bit;\r | |
d987459f SZ |
164 | }\r |
165 | }\r | |
166 | \r | |
167 | if (Available < Units) {\r | |
168 | return NULL;\r | |
169 | }\r | |
170 | \r | |
171 | //\r | |
172 | // Mark the memory as allocated\r | |
173 | //\r | |
1436aea4 MK |
174 | Byte = StartByte;\r |
175 | Bit = StartBit;\r | |
d987459f SZ |
176 | \r |
177 | for (Count = 0; Count < Units; Count++) {\r | |
178 | ASSERT (!USB_HC_BIT_IS_SET (Block->Bits[Byte], Bit));\r | |
179 | \r | |
1436aea4 | 180 | Block->Bits[Byte] = (UINT8)(Block->Bits[Byte] | (UINT8)USB_HC_BIT (Bit));\r |
d987459f SZ |
181 | NEXT_BIT (Byte, Bit);\r |
182 | }\r | |
183 | \r | |
184 | return Block->BufHost + (StartByte * 8 + StartBit) * USBHC_MEM_UNIT;\r | |
185 | }\r | |
186 | \r | |
187 | /**\r | |
188 | Calculate the corresponding pci bus address according to the Mem parameter.\r | |
189 | \r | |
190 | @param Pool The memory pool of the host controller.\r | |
191 | @param Mem The pointer to host memory.\r | |
192 | @param Size The size of the memory region.\r | |
193 | \r | |
194 | @return The pci memory address\r | |
195 | \r | |
196 | **/\r | |
197 | EFI_PHYSICAL_ADDRESS\r | |
198 | UsbHcGetPciAddrForHostAddr (\r | |
1436aea4 MK |
199 | IN USBHC_MEM_POOL *Pool,\r |
200 | IN VOID *Mem,\r | |
201 | IN UINTN Size\r | |
d987459f SZ |
202 | )\r |
203 | {\r | |
204 | USBHC_MEM_BLOCK *Head;\r | |
205 | USBHC_MEM_BLOCK *Block;\r | |
206 | UINTN AllocSize;\r | |
207 | EFI_PHYSICAL_ADDRESS PhyAddr;\r | |
208 | UINTN Offset;\r | |
209 | \r | |
210 | Head = Pool->Head;\r | |
211 | AllocSize = USBHC_MEM_ROUND (Size);\r | |
212 | \r | |
213 | if (Mem == NULL) {\r | |
214 | return 0;\r | |
215 | }\r | |
216 | \r | |
217 | for (Block = Head; Block != NULL; Block = Block->Next) {\r | |
218 | //\r | |
219 | // scan the memory block list for the memory block that\r | |
220 | // completely contains the allocated memory.\r | |
221 | //\r | |
1436aea4 | 222 | if ((Block->BufHost <= (UINT8 *)Mem) && (((UINT8 *)Mem + AllocSize) <= (Block->BufHost + Block->BufLen))) {\r |
d987459f SZ |
223 | break;\r |
224 | }\r | |
225 | }\r | |
226 | \r | |
227 | ASSERT ((Block != NULL));\r | |
228 | //\r | |
229 | // calculate the pci memory address for host memory address.\r | |
230 | //\r | |
1436aea4 MK |
231 | Offset = (UINT8 *)Mem - Block->BufHost;\r |
232 | PhyAddr = (EFI_PHYSICAL_ADDRESS)(UINTN)(Block->Buf + Offset);\r | |
d987459f SZ |
233 | return PhyAddr;\r |
234 | }\r | |
235 | \r | |
236 | /**\r | |
237 | Calculate the corresponding host address according to the pci address.\r | |
238 | \r | |
239 | @param Pool The memory pool of the host controller.\r | |
240 | @param Mem The pointer to pci memory.\r | |
241 | @param Size The size of the memory region.\r | |
242 | \r | |
243 | @return The host memory address\r | |
244 | \r | |
245 | **/\r | |
246 | EFI_PHYSICAL_ADDRESS\r | |
247 | UsbHcGetHostAddrForPciAddr (\r | |
1436aea4 MK |
248 | IN USBHC_MEM_POOL *Pool,\r |
249 | IN VOID *Mem,\r | |
250 | IN UINTN Size\r | |
d987459f SZ |
251 | )\r |
252 | {\r | |
253 | USBHC_MEM_BLOCK *Head;\r | |
254 | USBHC_MEM_BLOCK *Block;\r | |
255 | UINTN AllocSize;\r | |
256 | EFI_PHYSICAL_ADDRESS HostAddr;\r | |
257 | UINTN Offset;\r | |
258 | \r | |
259 | Head = Pool->Head;\r | |
260 | AllocSize = USBHC_MEM_ROUND (Size);\r | |
261 | \r | |
262 | if (Mem == NULL) {\r | |
263 | return 0;\r | |
264 | }\r | |
265 | \r | |
266 | for (Block = Head; Block != NULL; Block = Block->Next) {\r | |
267 | //\r | |
268 | // scan the memory block list for the memory block that\r | |
269 | // completely contains the allocated memory.\r | |
270 | //\r | |
1436aea4 | 271 | if ((Block->Buf <= (UINT8 *)Mem) && (((UINT8 *)Mem + AllocSize) <= (Block->Buf + Block->BufLen))) {\r |
d987459f SZ |
272 | break;\r |
273 | }\r | |
274 | }\r | |
275 | \r | |
276 | ASSERT ((Block != NULL));\r | |
277 | //\r | |
278 | // calculate the host memory address for pci memory address.\r | |
279 | //\r | |
1436aea4 MK |
280 | Offset = (UINT8 *)Mem - Block->Buf;\r |
281 | HostAddr = (EFI_PHYSICAL_ADDRESS)(UINTN)(Block->BufHost + Offset);\r | |
d987459f SZ |
282 | return HostAddr;\r |
283 | }\r | |
284 | \r | |
285 | /**\r | |
286 | Insert the memory block to the pool's list of the blocks.\r | |
287 | \r | |
288 | @param Head The head of the memory pool's block list.\r | |
289 | @param Block The memory block to insert.\r | |
290 | \r | |
291 | **/\r | |
292 | VOID\r | |
293 | UsbHcInsertMemBlockToPool (\r | |
1436aea4 MK |
294 | IN USBHC_MEM_BLOCK *Head,\r |
295 | IN USBHC_MEM_BLOCK *Block\r | |
d987459f SZ |
296 | )\r |
297 | {\r | |
298 | ASSERT ((Head != NULL) && (Block != NULL));\r | |
299 | Block->Next = Head->Next;\r | |
300 | Head->Next = Block;\r | |
301 | }\r | |
302 | \r | |
303 | /**\r | |
304 | Is the memory block empty?\r | |
305 | \r | |
306 | @param Block The memory block to check.\r | |
307 | \r | |
308 | @retval TRUE The memory block is empty.\r | |
309 | @retval FALSE The memory block isn't empty.\r | |
310 | \r | |
311 | **/\r | |
312 | BOOLEAN\r | |
313 | UsbHcIsMemBlockEmpty (\r | |
1436aea4 | 314 | IN USBHC_MEM_BLOCK *Block\r |
d987459f SZ |
315 | )\r |
316 | {\r | |
1436aea4 | 317 | UINTN Index;\r |
d987459f SZ |
318 | \r |
319 | for (Index = 0; Index < Block->BitsLen; Index++) {\r | |
320 | if (Block->Bits[Index] != 0) {\r | |
321 | return FALSE;\r | |
322 | }\r | |
323 | }\r | |
324 | \r | |
325 | return TRUE;\r | |
326 | }\r | |
327 | \r | |
d987459f SZ |
328 | /**\r |
329 | Initialize the memory management pool for the host controller.\r | |
330 | \r | |
331 | @return Pointer to the allocated memory pool or NULL if failed.\r | |
332 | \r | |
333 | **/\r | |
334 | USBHC_MEM_POOL *\r | |
335 | UsbHcInitMemPool (\r | |
336 | VOID\r | |
337 | )\r | |
338 | {\r | |
339 | USBHC_MEM_POOL *Pool;\r | |
340 | UINTN PageNumber;\r | |
341 | EFI_STATUS Status;\r | |
342 | EFI_PHYSICAL_ADDRESS TempPtr;\r | |
343 | \r | |
344 | PageNumber = EFI_SIZE_TO_PAGES (sizeof (USBHC_MEM_POOL));\r | |
1436aea4 MK |
345 | Status = PeiServicesAllocatePages (\r |
346 | EfiBootServicesData,\r | |
347 | PageNumber,\r | |
348 | &TempPtr\r | |
349 | );\r | |
d987459f SZ |
350 | if (EFI_ERROR (Status)) {\r |
351 | return NULL;\r | |
352 | }\r | |
d987459f | 353 | \r |
1436aea4 MK |
354 | ZeroMem ((VOID *)(UINTN)TempPtr, EFI_PAGES_TO_SIZE (PageNumber));\r |
355 | \r | |
356 | Pool = (USBHC_MEM_POOL *)((UINTN)TempPtr);\r | |
d987459f SZ |
357 | Pool->Head = UsbHcAllocMemBlock (USBHC_MEM_DEFAULT_PAGES);\r |
358 | \r | |
359 | if (Pool->Head == NULL) {\r | |
360 | //\r | |
361 | // No free memory in PEI.\r | |
362 | //\r | |
363 | Pool = NULL;\r | |
364 | }\r | |
365 | \r | |
366 | return Pool;\r | |
367 | }\r | |
368 | \r | |
47ab3970 AC |
369 | /**\r |
370 | Unlink the memory block from the pool's list.\r | |
371 | \r | |
372 | @param Head The block list head of the memory's pool.\r | |
373 | @param BlockToUnlink The memory block to unlink.\r | |
374 | \r | |
375 | **/\r | |
376 | VOID\r | |
377 | UsbHcUnlinkMemBlock (\r | |
378 | IN USBHC_MEM_BLOCK *Head,\r | |
379 | IN USBHC_MEM_BLOCK *BlockToUnlink\r | |
380 | )\r | |
381 | {\r | |
382 | USBHC_MEM_BLOCK *Block;\r | |
383 | \r | |
384 | ASSERT ((Head != NULL) && (BlockToUnlink != NULL));\r | |
385 | \r | |
386 | for (Block = Head; Block != NULL; Block = Block->Next) {\r | |
387 | if (Block->Next == BlockToUnlink) {\r | |
388 | Block->Next = BlockToUnlink->Next;\r | |
389 | BlockToUnlink->Next = NULL;\r | |
390 | break;\r | |
391 | }\r | |
392 | }\r | |
393 | }\r | |
394 | \r | |
d987459f SZ |
395 | /**\r |
396 | Release the memory management pool.\r | |
397 | \r | |
398 | @param Pool The USB memory pool to free.\r | |
399 | \r | |
400 | **/\r | |
401 | VOID\r | |
402 | UsbHcFreeMemPool (\r | |
1436aea4 | 403 | IN USBHC_MEM_POOL *Pool\r |
d987459f SZ |
404 | )\r |
405 | {\r | |
1436aea4 | 406 | USBHC_MEM_BLOCK *Block;\r |
d987459f SZ |
407 | \r |
408 | ASSERT (Pool->Head != NULL);\r | |
409 | \r | |
410 | //\r | |
411 | // Unlink all the memory blocks from the pool, then free them.\r | |
412 | // UsbHcUnlinkMemBlock can't be used to unlink and free the\r | |
413 | // first block.\r | |
414 | //\r | |
415 | for (Block = Pool->Head->Next; Block != NULL; Block = Pool->Head->Next) {\r | |
47ab3970 | 416 | UsbHcUnlinkMemBlock (Pool->Head, Block);\r |
d987459f SZ |
417 | UsbHcFreeMemBlock (Pool, Block);\r |
418 | }\r | |
419 | \r | |
420 | UsbHcFreeMemBlock (Pool, Pool->Head);\r | |
421 | }\r | |
422 | \r | |
423 | /**\r | |
424 | Allocate some memory from the host controller's memory pool\r | |
425 | which can be used to communicate with host controller.\r | |
426 | \r | |
427 | @param Pool The host controller's memory pool.\r | |
428 | @param Size Size of the memory to allocate.\r | |
429 | \r | |
430 | @return The allocated memory or NULL.\r | |
431 | \r | |
432 | **/\r | |
433 | VOID *\r | |
434 | UsbHcAllocateMem (\r | |
1436aea4 MK |
435 | IN USBHC_MEM_POOL *Pool,\r |
436 | IN UINTN Size\r | |
d987459f SZ |
437 | )\r |
438 | {\r | |
1436aea4 MK |
439 | USBHC_MEM_BLOCK *Head;\r |
440 | USBHC_MEM_BLOCK *Block;\r | |
441 | USBHC_MEM_BLOCK *NewBlock;\r | |
442 | VOID *Mem;\r | |
443 | UINTN AllocSize;\r | |
444 | UINTN Pages;\r | |
d987459f SZ |
445 | \r |
446 | Mem = NULL;\r | |
447 | AllocSize = USBHC_MEM_ROUND (Size);\r | |
448 | Head = Pool->Head;\r | |
449 | ASSERT (Head != NULL);\r | |
450 | \r | |
451 | //\r | |
452 | // First check whether current memory blocks can satisfy the allocation.\r | |
453 | //\r | |
454 | for (Block = Head; Block != NULL; Block = Block->Next) {\r | |
455 | Mem = UsbHcAllocMemFromBlock (Block, AllocSize / USBHC_MEM_UNIT);\r | |
456 | \r | |
457 | if (Mem != NULL) {\r | |
458 | ZeroMem (Mem, Size);\r | |
459 | break;\r | |
460 | }\r | |
461 | }\r | |
462 | \r | |
463 | if (Mem != NULL) {\r | |
464 | return Mem;\r | |
465 | }\r | |
466 | \r | |
467 | //\r | |
468 | // Create a new memory block if there is not enough memory\r | |
469 | // in the pool. If the allocation size is larger than the\r | |
470 | // default page number, just allocate a large enough memory\r | |
471 | // block. Otherwise allocate default pages.\r | |
472 | //\r | |
473 | if (AllocSize > EFI_PAGES_TO_SIZE (USBHC_MEM_DEFAULT_PAGES)) {\r | |
474 | Pages = EFI_SIZE_TO_PAGES (AllocSize);\r | |
475 | } else {\r | |
476 | Pages = USBHC_MEM_DEFAULT_PAGES;\r | |
477 | }\r | |
1436aea4 | 478 | \r |
d987459f SZ |
479 | NewBlock = UsbHcAllocMemBlock (Pages);\r |
480 | \r | |
481 | if (NewBlock == NULL) {\r | |
482 | return NULL;\r | |
483 | }\r | |
484 | \r | |
485 | //\r | |
486 | // Add the new memory block to the pool, then allocate memory from it\r | |
487 | //\r | |
488 | UsbHcInsertMemBlockToPool (Head, NewBlock);\r | |
489 | Mem = UsbHcAllocMemFromBlock (NewBlock, AllocSize / USBHC_MEM_UNIT);\r | |
490 | \r | |
491 | if (Mem != NULL) {\r | |
492 | ZeroMem (Mem, Size);\r | |
493 | }\r | |
494 | \r | |
495 | return Mem;\r | |
496 | }\r | |
497 | \r | |
498 | /**\r | |
499 | Free the allocated memory back to the memory pool.\r | |
500 | \r | |
501 | @param Pool The memory pool of the host controller.\r | |
502 | @param Mem The memory to free.\r | |
503 | @param Size The size of the memory to free.\r | |
504 | \r | |
505 | **/\r | |
506 | VOID\r | |
507 | UsbHcFreeMem (\r | |
1436aea4 MK |
508 | IN USBHC_MEM_POOL *Pool,\r |
509 | IN VOID *Mem,\r | |
510 | IN UINTN Size\r | |
d987459f SZ |
511 | )\r |
512 | {\r | |
1436aea4 MK |
513 | USBHC_MEM_BLOCK *Head;\r |
514 | USBHC_MEM_BLOCK *Block;\r | |
515 | UINT8 *ToFree;\r | |
516 | UINTN AllocSize;\r | |
517 | UINTN Byte;\r | |
518 | UINTN Bit;\r | |
519 | UINTN Count;\r | |
d987459f SZ |
520 | \r |
521 | Head = Pool->Head;\r | |
522 | AllocSize = USBHC_MEM_ROUND (Size);\r | |
1436aea4 | 523 | ToFree = (UINT8 *)Mem;\r |
d987459f SZ |
524 | \r |
525 | for (Block = Head; Block != NULL; Block = Block->Next) {\r | |
526 | //\r | |
527 | // scan the memory block list for the memory block that\r | |
528 | // completely contains the memory to free.\r | |
529 | //\r | |
530 | if ((Block->BufHost <= ToFree) && ((ToFree + AllocSize) <= (Block->BufHost + Block->BufLen))) {\r | |
531 | //\r | |
532 | // compute the start byte and bit in the bit array\r | |
533 | //\r | |
1436aea4 MK |
534 | Byte = ((ToFree - Block->BufHost) / USBHC_MEM_UNIT) / 8;\r |
535 | Bit = ((ToFree - Block->BufHost) / USBHC_MEM_UNIT) % 8;\r | |
d987459f SZ |
536 | \r |
537 | //\r | |
2048c585 | 538 | // reset associated bits in bit array\r |
d987459f SZ |
539 | //\r |
540 | for (Count = 0; Count < (AllocSize / USBHC_MEM_UNIT); Count++) {\r | |
541 | ASSERT (USB_HC_BIT_IS_SET (Block->Bits[Byte], Bit));\r | |
542 | \r | |
1436aea4 | 543 | Block->Bits[Byte] = (UINT8)(Block->Bits[Byte] ^ USB_HC_BIT (Bit));\r |
d987459f SZ |
544 | NEXT_BIT (Byte, Bit);\r |
545 | }\r | |
546 | \r | |
547 | break;\r | |
548 | }\r | |
549 | }\r | |
550 | \r | |
551 | //\r | |
552 | // If Block == NULL, it means that the current memory isn't\r | |
553 | // in the host controller's pool. This is critical because\r | |
554 | // the caller has passed in a wrong memory pointer\r | |
555 | //\r | |
556 | ASSERT (Block != NULL);\r | |
557 | \r | |
558 | //\r | |
559 | // Release the current memory block if it is empty and not the head\r | |
560 | //\r | |
561 | if ((Block != Head) && UsbHcIsMemBlockEmpty (Block)) {\r | |
47ab3970 | 562 | UsbHcUnlinkMemBlock (Head, Block);\r |
d987459f SZ |
563 | UsbHcFreeMemBlock (Pool, Block);\r |
564 | }\r | |
565 | }\r | |
566 | \r | |
567 | /**\r | |
568 | Allocates pages at a specified alignment.\r | |
569 | \r | |
570 | If Alignment is not a power of two and Alignment is not zero, then ASSERT().\r | |
571 | \r | |
572 | @param Pages The number of pages to allocate.\r | |
573 | @param Alignment The requested alignment of the allocation. Must be a power of two.\r | |
574 | @param HostAddress The system memory address to map to the PCI controller.\r | |
575 | @param DeviceAddress The resulting map address for the bus master PCI controller to\r | |
576 | use to access the hosts HostAddress.\r | |
b575ca32 | 577 | @param Mapping A resulting value to pass to Unmap().\r |
d987459f SZ |
578 | \r |
579 | @retval EFI_SUCCESS Success to allocate aligned pages.\r | |
580 | @retval EFI_INVALID_PARAMETER Pages or Alignment is not valid.\r | |
581 | @retval EFI_OUT_OF_RESOURCES Do not have enough resources to allocate memory.\r | |
582 | \r | |
583 | **/\r | |
584 | EFI_STATUS\r | |
585 | UsbHcAllocateAlignedPages (\r | |
1436aea4 MK |
586 | IN UINTN Pages,\r |
587 | IN UINTN Alignment,\r | |
588 | OUT VOID **HostAddress,\r | |
589 | OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,\r | |
590 | OUT VOID **Mapping\r | |
d987459f SZ |
591 | )\r |
592 | {\r | |
593 | EFI_STATUS Status;\r | |
b575ca32 | 594 | VOID *Memory;\r |
b575ca32 | 595 | EFI_PHYSICAL_ADDRESS DeviceMemory;\r |
d987459f SZ |
596 | \r |
597 | //\r | |
598 | // Alignment must be a power of two or zero.\r | |
599 | //\r | |
600 | ASSERT ((Alignment & (Alignment - 1)) == 0);\r | |
601 | \r | |
602 | if ((Alignment & (Alignment - 1)) != 0) {\r | |
603 | return EFI_INVALID_PARAMETER;\r | |
604 | }\r | |
605 | \r | |
606 | if (Pages == 0) {\r | |
607 | return EFI_INVALID_PARAMETER;\r | |
608 | }\r | |
609 | \r | |
610 | if (Alignment > EFI_PAGE_SIZE) {\r | |
2bbbdeee | 611 | Status = IoMmuAllocateAlignedBuffer (\r |
d987459f | 612 | Pages,\r |
2bbbdeee | 613 | Alignment,\r |
b575ca32 JY |
614 | &Memory,\r |
615 | &DeviceMemory,\r | |
616 | Mapping\r | |
d987459f SZ |
617 | );\r |
618 | if (EFI_ERROR (Status)) {\r | |
619 | return EFI_OUT_OF_RESOURCES;\r | |
620 | }\r | |
d987459f SZ |
621 | } else {\r |
622 | //\r | |
623 | // Do not over-allocate pages in this case.\r | |
624 | //\r | |
b575ca32 | 625 | Status = IoMmuAllocateBuffer (\r |
d987459f | 626 | Pages,\r |
b575ca32 JY |
627 | &Memory,\r |
628 | &DeviceMemory,\r | |
629 | Mapping\r | |
d987459f SZ |
630 | );\r |
631 | if (EFI_ERROR (Status)) {\r | |
632 | return EFI_OUT_OF_RESOURCES;\r | |
633 | }\r | |
d987459f SZ |
634 | }\r |
635 | \r | |
1436aea4 | 636 | *HostAddress = Memory;\r |
2bbbdeee | 637 | *DeviceAddress = DeviceMemory;\r |
d987459f SZ |
638 | \r |
639 | return EFI_SUCCESS;\r | |
640 | }\r | |
641 | \r | |
642 | /**\r | |
643 | Frees memory that was allocated with UsbHcAllocateAlignedPages().\r | |
644 | \r | |
645 | @param HostAddress The system memory address to map to the PCI controller.\r | |
646 | @param Pages The number of pages to free.\r | |
b575ca32 | 647 | @param Mapping The mapping value returned from Map().\r |
d987459f SZ |
648 | \r |
649 | **/\r | |
650 | VOID\r | |
651 | UsbHcFreeAlignedPages (\r | |
1436aea4 MK |
652 | IN VOID *HostAddress,\r |
653 | IN UINTN Pages,\r | |
654 | IN VOID *Mapping\r | |
d987459f SZ |
655 | )\r |
656 | {\r | |
657 | ASSERT (Pages != 0);\r | |
b575ca32 JY |
658 | \r |
659 | IoMmuFreeBuffer (Pages, HostAddress, Mapping);\r | |
d987459f | 660 | }\r |