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913cb9dc | 1 | /** @file\r |
2 | \r | |
78c2ffb5 | 3 | Routine procedures for memory allocate/free.\r |
4 | \r | |
597f4ee2 | 5 | Copyright (c) 2007 - 2009, Intel Corporation\r |
913cb9dc | 6 | All rights reserved. This program and the accompanying materials\r |
7 | are licensed and made available under the terms and conditions of the BSD License\r | |
8 | which accompanies this distribution. The full text of the license may be found at\r | |
9 | http://opensource.org/licenses/bsd-license.php\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
913cb9dc | 14 | **/\r |
15 | \r | |
16 | \r | |
17 | #include "Ehci.h"\r | |
18 | \r | |
19 | \r | |
913cb9dc | 20 | /**\r |
78c2ffb5 | 21 | Allocate a block of memory to be used by the buffer pool.\r |
913cb9dc | 22 | \r |
78c2ffb5 | 23 | @param Pool The buffer pool to allocate memory for.\r |
24 | @param Pages How many pages to allocate.\r | |
913cb9dc | 25 | \r |
78c2ffb5 | 26 | @return The allocated memory block or NULL if failed.\r |
913cb9dc | 27 | \r |
28 | **/\r | |
913cb9dc | 29 | USBHC_MEM_BLOCK *\r |
30 | UsbHcAllocMemBlock (\r | |
31 | IN USBHC_MEM_POOL *Pool,\r | |
32 | IN UINTN Pages\r | |
33 | )\r | |
34 | {\r | |
35 | USBHC_MEM_BLOCK *Block;\r | |
36 | EFI_PCI_IO_PROTOCOL *PciIo;\r | |
37 | VOID *BufHost;\r | |
38 | VOID *Mapping;\r | |
39 | EFI_PHYSICAL_ADDRESS MappedAddr;\r | |
40 | UINTN Bytes;\r | |
41 | EFI_STATUS Status;\r | |
42 | \r | |
43 | PciIo = Pool->PciIo;\r | |
44 | \r | |
45 | Block = AllocateZeroPool (sizeof (USBHC_MEM_BLOCK));\r | |
46 | if (Block == NULL) {\r | |
47 | return NULL;\r | |
48 | }\r | |
49 | \r | |
50 | //\r | |
51 | // each bit in the bit array represents USBHC_MEM_UNIT\r | |
52 | // bytes of memory in the memory block.\r | |
53 | //\r | |
54 | ASSERT (USBHC_MEM_UNIT * 8 <= EFI_PAGE_SIZE);\r | |
55 | \r | |
56 | Block->BufLen = EFI_PAGES_TO_SIZE (Pages);\r | |
57 | Block->BitsLen = Block->BufLen / (USBHC_MEM_UNIT * 8);\r | |
58 | Block->Bits = AllocateZeroPool (Block->BitsLen);\r | |
59 | \r | |
60 | if (Block->Bits == NULL) {\r | |
61 | gBS->FreePool (Block);\r | |
62 | return NULL;\r | |
63 | }\r | |
64 | \r | |
65 | //\r | |
66 | // Allocate the number of Pages of memory, then map it for\r | |
67 | // bus master read and write.\r | |
68 | //\r | |
69 | Status = PciIo->AllocateBuffer (\r | |
70 | PciIo,\r | |
71 | AllocateAnyPages,\r | |
72 | EfiBootServicesData,\r | |
73 | Pages,\r | |
74 | &BufHost,\r | |
75 | 0\r | |
76 | );\r | |
77 | \r | |
78 | if (EFI_ERROR (Status)) {\r | |
79 | goto FREE_BITARRAY;\r | |
80 | }\r | |
81 | \r | |
82 | Bytes = EFI_PAGES_TO_SIZE (Pages);\r | |
83 | Status = PciIo->Map (\r | |
84 | PciIo,\r | |
85 | EfiPciIoOperationBusMasterCommonBuffer,\r | |
86 | BufHost,\r | |
87 | &Bytes,\r | |
88 | &MappedAddr,\r | |
89 | &Mapping\r | |
90 | );\r | |
91 | \r | |
92 | if (EFI_ERROR (Status) || (Bytes != EFI_PAGES_TO_SIZE (Pages))) {\r | |
93 | goto FREE_BUFFER;\r | |
94 | }\r | |
95 | \r | |
96 | //\r | |
97 | // Check whether the data structure used by the host controller\r | |
98 | // should be restricted into the same 4G\r | |
99 | //\r | |
100 | if (Pool->Check4G && (Pool->Which4G != USB_HC_HIGH_32BIT (MappedAddr))) {\r | |
101 | PciIo->Unmap (PciIo, Mapping);\r | |
102 | goto FREE_BUFFER;\r | |
103 | }\r | |
104 | \r | |
105 | Block->BufHost = BufHost;\r | |
106 | Block->Buf = (UINT8 *) ((UINTN) MappedAddr);\r | |
107 | Block->Mapping = Mapping;\r | |
108 | \r | |
913cb9dc | 109 | return Block;\r |
110 | \r | |
111 | FREE_BUFFER:\r | |
112 | PciIo->FreeBuffer (PciIo, Pages, BufHost);\r | |
113 | \r | |
114 | FREE_BITARRAY:\r | |
115 | gBS->FreePool (Block->Bits);\r | |
116 | gBS->FreePool (Block);\r | |
117 | return NULL;\r | |
118 | }\r | |
119 | \r | |
120 | \r | |
121 | /**\r | |
78c2ffb5 | 122 | Free the memory block from the memory pool.\r |
913cb9dc | 123 | \r |
78c2ffb5 | 124 | @param Pool The memory pool to free the block from.\r |
125 | @param Block The memory block to free.\r | |
913cb9dc | 126 | \r |
913cb9dc | 127 | **/\r |
913cb9dc | 128 | VOID\r |
129 | UsbHcFreeMemBlock (\r | |
130 | IN USBHC_MEM_POOL *Pool,\r | |
131 | IN USBHC_MEM_BLOCK *Block\r | |
132 | )\r | |
133 | {\r | |
134 | EFI_PCI_IO_PROTOCOL *PciIo;\r | |
135 | \r | |
136 | ASSERT ((Pool != NULL) && (Block != NULL));\r | |
137 | \r | |
138 | PciIo = Pool->PciIo;\r | |
139 | \r | |
140 | //\r | |
141 | // Unmap the common buffer then free the structures\r | |
142 | //\r | |
143 | PciIo->Unmap (PciIo, Block->Mapping);\r | |
144 | PciIo->FreeBuffer (PciIo, EFI_SIZE_TO_PAGES (Block->BufLen), Block->BufHost);\r | |
145 | \r | |
146 | gBS->FreePool (Block->Bits);\r | |
147 | gBS->FreePool (Block);\r | |
148 | }\r | |
149 | \r | |
150 | \r | |
151 | /**\r | |
78c2ffb5 | 152 | Alloc some memory from the block.\r |
913cb9dc | 153 | \r |
78c2ffb5 | 154 | @param Block The memory block to allocate memory from.\r |
155 | @param Units Number of memory units to allocate.\r | |
913cb9dc | 156 | \r |
78c2ffb5 | 157 | @return The pointer to the allocated memory. If couldn't allocate the needed memory,\r |
158 | the return value is NULL.\r | |
913cb9dc | 159 | \r |
160 | **/\r | |
913cb9dc | 161 | VOID *\r |
162 | UsbHcAllocMemFromBlock (\r | |
163 | IN USBHC_MEM_BLOCK *Block,\r | |
164 | IN UINTN Units\r | |
165 | )\r | |
166 | {\r | |
167 | UINTN Byte;\r | |
168 | UINT8 Bit;\r | |
169 | UINTN StartByte;\r | |
170 | UINT8 StartBit;\r | |
171 | UINTN Available;\r | |
172 | UINTN Count;\r | |
173 | \r | |
174 | ASSERT ((Block != 0) && (Units != 0));\r | |
175 | \r | |
176 | StartByte = 0;\r | |
177 | StartBit = 0;\r | |
178 | Available = 0;\r | |
179 | \r | |
180 | for (Byte = 0, Bit = 0; Byte < Block->BitsLen;) {\r | |
181 | //\r | |
182 | // If current bit is zero, the corresponding memory unit is\r | |
183 | // available, otherwise we need to restart our searching.\r | |
184 | // Available counts the consective number of zero bit.\r | |
185 | //\r | |
186 | if (!USB_HC_BIT_IS_SET (Block->Bits[Byte], Bit)) {\r | |
187 | Available++;\r | |
188 | \r | |
189 | if (Available >= Units) {\r | |
190 | break;\r | |
191 | }\r | |
192 | \r | |
193 | NEXT_BIT (Byte, Bit);\r | |
194 | \r | |
195 | } else {\r | |
196 | NEXT_BIT (Byte, Bit);\r | |
197 | \r | |
198 | Available = 0;\r | |
199 | StartByte = Byte;\r | |
200 | StartBit = Bit;\r | |
201 | }\r | |
202 | }\r | |
203 | \r | |
204 | if (Available < Units) {\r | |
205 | return NULL;\r | |
206 | }\r | |
207 | \r | |
208 | //\r | |
209 | // Mark the memory as allocated\r | |
210 | //\r | |
211 | Byte = StartByte;\r | |
212 | Bit = StartBit;\r | |
213 | \r | |
214 | for (Count = 0; Count < Units; Count++) {\r | |
215 | ASSERT (!USB_HC_BIT_IS_SET (Block->Bits[Byte], Bit));\r | |
216 | \r | |
d074a8e1 | 217 | Block->Bits[Byte] = (UINT8) (Block->Bits[Byte] | USB_HC_BIT (Bit));\r |
913cb9dc | 218 | NEXT_BIT (Byte, Bit);\r |
219 | }\r | |
220 | \r | |
221 | return Block->Buf + (StartByte * 8 + StartBit) * USBHC_MEM_UNIT;\r | |
222 | }\r | |
223 | \r | |
224 | \r | |
225 | /**\r | |
78c2ffb5 | 226 | Insert the memory block to the pool's list of the blocks.\r |
913cb9dc | 227 | \r |
78c2ffb5 | 228 | @param Head The head of the memory pool's block list.\r |
229 | @param Block The memory block to insert.\r | |
913cb9dc | 230 | \r |
913cb9dc | 231 | **/\r |
913cb9dc | 232 | VOID\r |
233 | UsbHcInsertMemBlockToPool (\r | |
234 | IN USBHC_MEM_BLOCK *Head,\r | |
235 | IN USBHC_MEM_BLOCK *Block\r | |
236 | )\r | |
237 | {\r | |
238 | ASSERT ((Head != NULL) && (Block != NULL));\r | |
239 | Block->Next = Head->Next;\r | |
240 | Head->Next = Block;\r | |
241 | }\r | |
242 | \r | |
243 | \r | |
244 | /**\r | |
245 | Is the memory block empty?\r | |
246 | \r | |
78c2ffb5 | 247 | @param Block The memory block to check.\r |
913cb9dc | 248 | \r |
78c2ffb5 | 249 | @retval TRUE The memory block is empty.\r |
250 | @retval FALSE The memory block isn't empty.\r | |
913cb9dc | 251 | \r |
252 | **/\r | |
913cb9dc | 253 | BOOLEAN\r |
254 | UsbHcIsMemBlockEmpty (\r | |
255 | IN USBHC_MEM_BLOCK *Block\r | |
256 | )\r | |
257 | {\r | |
258 | UINTN Index;\r | |
259 | \r | |
260 | for (Index = 0; Index < Block->BitsLen; Index++) {\r | |
261 | if (Block->Bits[Index] != 0) {\r | |
262 | return FALSE;\r | |
263 | }\r | |
264 | }\r | |
265 | \r | |
266 | return TRUE;\r | |
267 | }\r | |
268 | \r | |
269 | \r | |
270 | /**\r | |
78c2ffb5 | 271 | Unlink the memory block from the pool's list.\r |
913cb9dc | 272 | \r |
78c2ffb5 | 273 | @param Head The block list head of the memory's pool.\r |
913cb9dc | 274 | @param BlockToUnlink The memory block to unlink.\r |
275 | \r | |
913cb9dc | 276 | **/\r |
913cb9dc | 277 | VOID\r |
278 | UsbHcUnlinkMemBlock (\r | |
279 | IN USBHC_MEM_BLOCK *Head,\r | |
280 | IN USBHC_MEM_BLOCK *BlockToUnlink\r | |
281 | )\r | |
282 | {\r | |
283 | USBHC_MEM_BLOCK *Block;\r | |
284 | \r | |
285 | ASSERT ((Head != NULL) && (BlockToUnlink != NULL));\r | |
286 | \r | |
287 | for (Block = Head; Block != NULL; Block = Block->Next) {\r | |
288 | if (Block->Next == BlockToUnlink) {\r | |
289 | Block->Next = BlockToUnlink->Next;\r | |
290 | BlockToUnlink->Next = NULL;\r | |
291 | break;\r | |
292 | }\r | |
293 | }\r | |
294 | }\r | |
295 | \r | |
296 | \r | |
297 | /**\r | |
78c2ffb5 | 298 | Initialize the memory management pool for the host controller.\r |
913cb9dc | 299 | \r |
78c2ffb5 | 300 | @param PciIo The PciIo that can be used to access the host controller.\r |
301 | @param Check4G Whether the host controller requires allocated memory\r | |
302 | from one 4G address space.\r | |
303 | @param Which4G The 4G memory area each memory allocated should be from.\r | |
913cb9dc | 304 | \r |
78c2ffb5 | 305 | @retval EFI_SUCCESS The memory pool is initialized.\r |
306 | @retval EFI_OUT_OF_RESOURCE Fail to init the memory pool.\r | |
913cb9dc | 307 | \r |
308 | **/\r | |
309 | USBHC_MEM_POOL *\r | |
310 | UsbHcInitMemPool (\r | |
311 | IN EFI_PCI_IO_PROTOCOL *PciIo,\r | |
312 | IN BOOLEAN Check4G,\r | |
313 | IN UINT32 Which4G\r | |
314 | )\r | |
315 | {\r | |
316 | USBHC_MEM_POOL *Pool;\r | |
317 | \r | |
318 | Pool = AllocatePool (sizeof (USBHC_MEM_POOL));\r | |
319 | \r | |
320 | if (Pool == NULL) {\r | |
321 | return Pool;\r | |
322 | }\r | |
323 | \r | |
324 | Pool->PciIo = PciIo;\r | |
325 | Pool->Check4G = Check4G;\r | |
326 | Pool->Which4G = Which4G;\r | |
327 | Pool->Head = UsbHcAllocMemBlock (Pool, USBHC_MEM_DEFAULT_PAGES);\r | |
328 | \r | |
329 | if (Pool->Head == NULL) {\r | |
330 | gBS->FreePool (Pool);\r | |
331 | Pool = NULL;\r | |
332 | }\r | |
333 | \r | |
334 | return Pool;\r | |
335 | }\r | |
336 | \r | |
337 | \r | |
338 | /**\r | |
78c2ffb5 | 339 | Release the memory management pool.\r |
913cb9dc | 340 | \r |
78c2ffb5 | 341 | @param Pool The USB memory pool to free.\r |
913cb9dc | 342 | \r |
78c2ffb5 | 343 | @retval EFI_SUCCESS The memory pool is freed.\r |
344 | @retval EFI_DEVICE_ERROR Failed to free the memory pool.\r | |
913cb9dc | 345 | \r |
346 | **/\r | |
347 | EFI_STATUS\r | |
348 | UsbHcFreeMemPool (\r | |
349 | IN USBHC_MEM_POOL *Pool\r | |
350 | )\r | |
351 | {\r | |
352 | USBHC_MEM_BLOCK *Block;\r | |
353 | \r | |
354 | ASSERT (Pool->Head != NULL);\r | |
355 | \r | |
356 | //\r | |
357 | // Unlink all the memory blocks from the pool, then free them.\r | |
358 | // UsbHcUnlinkMemBlock can't be used to unlink and free the\r | |
359 | // first block.\r | |
360 | //\r | |
361 | for (Block = Pool->Head->Next; Block != NULL; Block = Pool->Head->Next) {\r | |
362 | UsbHcUnlinkMemBlock (Pool->Head, Block);\r | |
363 | UsbHcFreeMemBlock (Pool, Block);\r | |
364 | }\r | |
365 | \r | |
366 | UsbHcFreeMemBlock (Pool, Pool->Head);\r | |
367 | gBS->FreePool (Pool);\r | |
368 | return EFI_SUCCESS;\r | |
369 | }\r | |
370 | \r | |
371 | \r | |
372 | /**\r | |
373 | Allocate some memory from the host controller's memory pool\r | |
374 | which can be used to communicate with host controller.\r | |
375 | \r | |
78c2ffb5 | 376 | @param Pool The host controller's memory pool.\r |
377 | @param Size Size of the memory to allocate.\r | |
913cb9dc | 378 | \r |
78c2ffb5 | 379 | @return The allocated memory or NULL.\r |
913cb9dc | 380 | \r |
381 | **/\r | |
382 | VOID *\r | |
383 | UsbHcAllocateMem (\r | |
384 | IN USBHC_MEM_POOL *Pool,\r | |
385 | IN UINTN Size\r | |
386 | )\r | |
387 | {\r | |
388 | USBHC_MEM_BLOCK *Head;\r | |
389 | USBHC_MEM_BLOCK *Block;\r | |
390 | USBHC_MEM_BLOCK *NewBlock;\r | |
391 | VOID *Mem;\r | |
392 | UINTN AllocSize;\r | |
393 | UINTN Pages;\r | |
394 | \r | |
395 | Mem = NULL;\r | |
396 | AllocSize = USBHC_MEM_ROUND (Size);\r | |
397 | Head = Pool->Head;\r | |
398 | ASSERT (Head != NULL);\r | |
399 | \r | |
400 | //\r | |
401 | // First check whether current memory blocks can satisfy the allocation.\r | |
402 | //\r | |
403 | for (Block = Head; Block != NULL; Block = Block->Next) {\r | |
404 | Mem = UsbHcAllocMemFromBlock (Block, AllocSize / USBHC_MEM_UNIT);\r | |
405 | \r | |
406 | if (Mem != NULL) {\r | |
407 | ZeroMem (Mem, Size);\r | |
408 | break;\r | |
409 | }\r | |
410 | }\r | |
411 | \r | |
412 | if (Mem != NULL) {\r | |
413 | return Mem;\r | |
414 | }\r | |
415 | \r | |
416 | //\r | |
417 | // Create a new memory block if there is not enough memory\r | |
418 | // in the pool. If the allocation size is larger than the\r | |
419 | // default page number, just allocate a large enough memory\r | |
420 | // block. Otherwise allocate default pages.\r | |
421 | //\r | |
422 | if (AllocSize > EFI_PAGES_TO_SIZE (USBHC_MEM_DEFAULT_PAGES)) {\r | |
423 | Pages = EFI_SIZE_TO_PAGES (AllocSize) + 1;\r | |
424 | } else {\r | |
425 | Pages = USBHC_MEM_DEFAULT_PAGES;\r | |
426 | }\r | |
427 | \r | |
428 | NewBlock = UsbHcAllocMemBlock (Pool, Pages);\r | |
429 | \r | |
430 | if (NewBlock == NULL) {\r | |
1c619535 | 431 | DEBUG ((EFI_D_INFO, "UsbHcAllocateMem: failed to allocate block\n"));\r |
913cb9dc | 432 | return NULL;\r |
433 | }\r | |
434 | \r | |
435 | //\r | |
436 | // Add the new memory block to the pool, then allocate memory from it\r | |
437 | //\r | |
438 | UsbHcInsertMemBlockToPool (Head, NewBlock);\r | |
439 | Mem = UsbHcAllocMemFromBlock (NewBlock, AllocSize / USBHC_MEM_UNIT);\r | |
440 | \r | |
441 | if (Mem != NULL) {\r | |
442 | ZeroMem (Mem, Size);\r | |
443 | }\r | |
444 | \r | |
445 | return Mem;\r | |
446 | }\r | |
447 | \r | |
448 | \r | |
449 | /**\r | |
78c2ffb5 | 450 | Free the allocated memory back to the memory pool.\r |
913cb9dc | 451 | \r |
78c2ffb5 | 452 | @param Pool The memory pool of the host controller.\r |
453 | @param Mem The memory to free.\r | |
454 | @param Size The size of the memory to free.\r | |
913cb9dc | 455 | \r |
913cb9dc | 456 | **/\r |
457 | VOID\r | |
458 | UsbHcFreeMem (\r | |
459 | IN USBHC_MEM_POOL *Pool,\r | |
460 | IN VOID *Mem,\r | |
461 | IN UINTN Size\r | |
462 | )\r | |
463 | {\r | |
464 | USBHC_MEM_BLOCK *Head;\r | |
465 | USBHC_MEM_BLOCK *Block;\r | |
466 | UINT8 *ToFree;\r | |
467 | UINTN AllocSize;\r | |
468 | UINTN Byte;\r | |
469 | UINTN Bit;\r | |
470 | UINTN Count;\r | |
471 | \r | |
472 | Head = Pool->Head;\r | |
473 | AllocSize = USBHC_MEM_ROUND (Size);\r | |
474 | ToFree = (UINT8 *) Mem;\r | |
475 | \r | |
476 | for (Block = Head; Block != NULL; Block = Block->Next) {\r | |
477 | //\r | |
478 | // scan the memory block list for the memory block that\r | |
479 | // completely contains the memory to free.\r | |
480 | //\r | |
481 | if ((Block->Buf <= ToFree) && ((ToFree + AllocSize) <= (Block->Buf + Block->BufLen))) {\r | |
482 | //\r | |
483 | // compute the start byte and bit in the bit array\r | |
484 | //\r | |
485 | Byte = ((ToFree - Block->Buf) / USBHC_MEM_UNIT) / 8;\r | |
486 | Bit = ((ToFree - Block->Buf) / USBHC_MEM_UNIT) % 8;\r | |
487 | \r | |
488 | //\r | |
489 | // reset associated bits in bit arry\r | |
490 | //\r | |
491 | for (Count = 0; Count < (AllocSize / USBHC_MEM_UNIT); Count++) {\r | |
492 | ASSERT (USB_HC_BIT_IS_SET (Block->Bits[Byte], Bit));\r | |
493 | \r | |
c52fa98c | 494 | Block->Bits[Byte] = (UINT8) (Block->Bits[Byte] ^ USB_HC_BIT (Bit));\r |
913cb9dc | 495 | NEXT_BIT (Byte, Bit);\r |
496 | }\r | |
497 | \r | |
498 | break;\r | |
499 | }\r | |
500 | }\r | |
501 | \r | |
502 | //\r | |
503 | // If Block == NULL, it means that the current memory isn't\r | |
504 | // in the host controller's pool. This is critical because\r | |
505 | // the caller has passed in a wrong memory point\r | |
506 | //\r | |
507 | ASSERT (Block != NULL);\r | |
508 | \r | |
509 | //\r | |
510 | // Release the current memory block if it is empty and not the head\r | |
511 | //\r | |
512 | if ((Block != Head) && UsbHcIsMemBlockEmpty (Block)) {\r | |
913cb9dc | 513 | UsbHcUnlinkMemBlock (Head, Block);\r |
514 | UsbHcFreeMemBlock (Pool, Block);\r | |
515 | }\r | |
516 | \r | |
517 | return ;\r | |
518 | }\r |