summaryrefslogtreecommitdiff
path: root/drivers/net/npe/IxOsalBufferMgt.c
blob: fa8db477afc6f1ce6477d870630b4b17e1e8eb51 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
/**
 * @file IxOsalBufferMgt.c
 *
 * @brief Default buffer pool management and buffer management
 *        Implementation.
 *
 * Design Notes:
 *
 * @par
 * IXP400 SW Release version 2.0
 * 
 * -- Copyright Notice --
 * 
 * @par
 * Copyright 2001-2005, Intel Corporation.
 * All rights reserved.
 * 
 * @par
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the Intel Corporation nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 * 
 * @par
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * @par
 * -- End of Copyright Notice --
 */

/*
 * OS may choose to use default bufferMgt by defining
 * IX_OSAL_USE_DEFAULT_BUFFER_MGT in IxOsalOsBufferMgt.h  
 */

#include "IxOsal.h"

#define IX_OSAL_BUFFER_FREE_PROTECTION  /* Define this to enable Illegal MBuf Freed Protection*/

/*
 * The implementation is only used when the following
 * is defined.
 */
#ifdef IX_OSAL_USE_DEFAULT_BUFFER_MGT


#define IX_OSAL_MBUF_SYS_SIGNATURE				(0x8BADF00D)
#define IX_OSAL_MBUF_SYS_SIGNATURE_MASK				(0xEFFFFFFF)
#define IX_OSAL_MBUF_USED_FLAG					(0x10000000)
#define IX_OSAL_MBUF_SYS_SIGNATURE_INIT(bufPtr)        		IX_OSAL_MBUF_SIGNATURE (bufPtr) = (UINT32)IX_OSAL_MBUF_SYS_SIGNATURE

/* 
*  This implementation is protect, the buffer pool management's  ixOsalMBufFree 
*  against an invalid MBUF pointer argument that already has been freed earlier 
*  or in other words resides in the free pool of MBUFs. This added feature, 
*  checks the MBUF "USED" FLAG. The Flag tells if the MBUF is still not freed 
*  back to the Buffer Pool.
*  Disable this feature for performance reasons by undef 
*  IX_OSAL_BUFFER_FREE_PROTECTION macro.
*/
#ifdef IX_OSAL_BUFFER_FREE_PROTECTION  /*IX_OSAL_BUFFER_FREE_PROTECTION With Buffer Free protection*/

#define IX_OSAL_MBUF_GET_SYS_SIGNATURE(bufPtr)		(IX_OSAL_MBUF_SIGNATURE (bufPtr)&(IX_OSAL_MBUF_SYS_SIGNATURE_MASK) )
#define IX_OSAL_MBUF_SET_SYS_SIGNATURE(bufPtr)    do {																											\
																									IX_OSAL_MBUF_SIGNATURE (bufPtr)&(~IX_OSAL_MBUF_SYS_SIGNATURE_MASK);\
														    									IX_OSAL_MBUF_SIGNATURE (bufPtr)|=IX_OSAL_MBUF_SYS_SIGNATURE;			\
																									}while(0)

#define IX_OSAL_MBUF_SET_USED_FLAG(bufPtr)   IX_OSAL_MBUF_SIGNATURE (bufPtr)|=IX_OSAL_MBUF_USED_FLAG
#define IX_OSAL_MBUF_CLEAR_USED_FLAG(bufPtr) IX_OSAL_MBUF_SIGNATURE (bufPtr)&=~IX_OSAL_MBUF_USED_FLAG
#define IX_OSAL_MBUF_ISSET_USED_FLAG(bufPtr) (IX_OSAL_MBUF_SIGNATURE (bufPtr)&IX_OSAL_MBUF_USED_FLAG)

#else

#define IX_OSAL_MBUF_GET_SYS_SIGNATURE(bufPtr)	 IX_OSAL_MBUF_SIGNATURE (bufPtr)
#define IX_OSAL_MBUF_SET_SYS_SIGNATURE(bufPtr)   IX_OSAL_MBUF_SIGNATURE (bufPtr) = IX_OSAL_MBUF_SYS_SIGNATURE

#endif /*IX_OSAL_BUFFER_FREE_PROTECTION With Buffer Free protection*/
/*
 * Variable declarations global to this file only.  Externs are followed by
 * static variables.
 */

/* 
 * A unit of 32, used to provide bit-shift for pool
 * management. Needs some work if users want more than 32 pools.
 */
#define IX_OSAL_BUFF_FREE_BITS 32

PRIVATE UINT32 ixOsalBuffFreePools[IX_OSAL_MBUF_MAX_POOLS /
    IX_OSAL_BUFF_FREE_BITS];

PUBLIC IX_OSAL_MBUF_POOL ixOsalBuffPools[IX_OSAL_MBUF_MAX_POOLS];

static int ixOsalBuffPoolsInUse = 0;

#ifdef IX_OSAL_BUFFER_ALLOC_SEPARATELY
PRIVATE IX_OSAL_MBUF *
ixOsalBuffPoolMbufInit (UINT32 mbufSizeAligned,
                      UINT32 dataSizeAligned,
                      IX_OSAL_MBUF_POOL *poolPtr);
#endif

PRIVATE IX_OSAL_MBUF_POOL * ixOsalPoolAlloc (void);                      

/*
 * Function definition: ixOsalPoolAlloc
 */

/****************************/

PRIVATE IX_OSAL_MBUF_POOL *
ixOsalPoolAlloc (void)
{
    register unsigned int i = 0;

    /*
     * Scan for the first free buffer. Free buffers are indicated by 0
     * on the corrsponding bit in ixOsalBuffFreePools. 
     */
    if (ixOsalBuffPoolsInUse >= IX_OSAL_MBUF_MAX_POOLS)
    {
        /*
         * Fail to grab a ptr this time 
         */
        return NULL;
    }

    while (ixOsalBuffFreePools[i / IX_OSAL_BUFF_FREE_BITS] &
        (1 << (i % IX_OSAL_BUFF_FREE_BITS)))
        i++;
    /*
     * Free buffer found. Mark it as busy and initialize. 
     */
    ixOsalBuffFreePools[i / IX_OSAL_BUFF_FREE_BITS] |=
        (1 << (i % IX_OSAL_BUFF_FREE_BITS));

    memset (&ixOsalBuffPools[i], 0, sizeof (IX_OSAL_MBUF_POOL));

    ixOsalBuffPools[i].poolIdx = i;
    ixOsalBuffPoolsInUse++;

    return &ixOsalBuffPools[i];
}


#ifdef IX_OSAL_BUFFER_ALLOC_SEPARATELY
PRIVATE IX_OSAL_MBUF *
ixOsalBuffPoolMbufInit (UINT32 mbufSizeAligned,
                      UINT32 dataSizeAligned,
                      IX_OSAL_MBUF_POOL *poolPtr)
{
    UINT8 *dataPtr;
    IX_OSAL_MBUF *realMbufPtr;
    /* Allocate cache-aligned memory for mbuf header */
    realMbufPtr = (IX_OSAL_MBUF *) IX_OSAL_CACHE_DMA_MALLOC (mbufSizeAligned);
    IX_OSAL_ASSERT (realMbufPtr != NULL);
    memset (realMbufPtr, 0, mbufSizeAligned);

    /* Allocate cache-aligned memory for mbuf data */
    dataPtr = (UINT8 *) IX_OSAL_CACHE_DMA_MALLOC (dataSizeAligned);
    IX_OSAL_ASSERT (dataPtr != NULL);
    memset (dataPtr, 0, dataSizeAligned);

    /* Fill in mbuf header fields */
    IX_OSAL_MBUF_MDATA (realMbufPtr) = dataPtr;
    IX_OSAL_MBUF_ALLOCATED_BUFF_DATA (realMbufPtr) = (UINT32)dataPtr;

    IX_OSAL_MBUF_MLEN (realMbufPtr) = dataSizeAligned;
    IX_OSAL_MBUF_ALLOCATED_BUFF_LEN (realMbufPtr) = dataSizeAligned;

    IX_OSAL_MBUF_NET_POOL (realMbufPtr) = (IX_OSAL_MBUF_POOL *) poolPtr;

    IX_OSAL_MBUF_SYS_SIGNATURE_INIT(realMbufPtr);

    /* update some statistical information */
    poolPtr->mbufMemSize += mbufSizeAligned;
    poolPtr->dataMemSize += dataSizeAligned;

    return realMbufPtr;
}
#endif /* #ifdef IX_OSAL_BUFFER_ALLOC_SEPARATELY */

/*
 * Function definition: ixOsalBuffPoolInit
 */

PUBLIC IX_OSAL_MBUF_POOL *
ixOsalPoolInit (UINT32 count, UINT32 size, const char *name)
{

    /* These variables are only used if UX_OSAL_BUFFER_ALLOC_SEPERATELY
     * is defined .
     */
#ifdef IX_OSAL_BUFFER_ALLOC_SEPARATELY
    UINT32 i, mbufSizeAligned, dataSizeAligned;
    IX_OSAL_MBUF *currentMbufPtr = NULL;
#else
    void *poolBufPtr;
    void *poolDataPtr;
    int mbufMemSize;
    int dataMemSize;
#endif

    IX_OSAL_MBUF_POOL *poolPtr = NULL;
    
    if (count <= 0)
    {
        ixOsalLog (IX_OSAL_LOG_LVL_ERROR,
            IX_OSAL_LOG_DEV_STDOUT,
            "ixOsalPoolInit(): " "count = 0 \n", 0, 0, 0, 0, 0, 0);
        return NULL;        
    }

    if (name == NULL)
    {
        ixOsalLog (IX_OSAL_LOG_LVL_ERROR,
            IX_OSAL_LOG_DEV_STDOUT,
            "ixOsalPoolInit(): " "NULL name \n", 0, 0, 0, 0, 0, 0);
        return NULL;        
    }
    
    if (strlen (name) > IX_OSAL_MBUF_POOL_NAME_LEN)
    {
        ixOsalLog (IX_OSAL_LOG_LVL_ERROR,
            IX_OSAL_LOG_DEV_STDOUT,
            "ixOsalPoolInit(): "
            "ERROR - name length should be no greater than %d  \n",
            IX_OSAL_MBUF_POOL_NAME_LEN, 0, 0, 0, 0, 0);
        return NULL;
    }

/* OS can choose whether to allocate all buffers all together (if it 
 * can handle a huge single alloc request), or to allocate buffers 
 * separately by the defining IX_OSAL_BUFFER_ALLOC_SEPARATELY.
 */
#ifdef IX_OSAL_BUFFER_ALLOC_SEPARATELY
    /* Get a pool Ptr */
    poolPtr = ixOsalPoolAlloc ();

    if (poolPtr == NULL)
    {
        ixOsalLog (IX_OSAL_LOG_LVL_ERROR,
            IX_OSAL_LOG_DEV_STDOUT,
            "ixOsalPoolInit(): " "Fail to Get PoolPtr \n", 0, 0, 0, 0, 0, 0);    
        return NULL;
    }

    mbufSizeAligned = IX_OSAL_MBUF_POOL_SIZE_ALIGN (sizeof (IX_OSAL_MBUF));
    dataSizeAligned = IX_OSAL_MBUF_POOL_SIZE_ALIGN(size);

    poolPtr->nextFreeBuf = NULL;    
    poolPtr->mbufMemPtr = NULL;    
    poolPtr->dataMemPtr = NULL;
    poolPtr->bufDataSize = dataSizeAligned;
    poolPtr->totalBufsInPool = count;
    poolPtr->poolAllocType = IX_OSAL_MBUF_POOL_TYPE_SYS_ALLOC;
    strcpy (poolPtr->name, name);


    for (i = 0; i < count; i++)
    {
	    /* create an mbuf */
	    currentMbufPtr = ixOsalBuffPoolMbufInit (mbufSizeAligned,
					         dataSizeAligned,
					         poolPtr);

#ifdef IX_OSAL_BUFFER_FREE_PROTECTION 		
/* Set the Buffer USED Flag. If not, ixOsalMBufFree will fail.
   ixOsalMbufFree used here is in a special case whereby, it's 
   used to add MBUF to the Pool. By specification, ixOsalMbufFree 
   deallocates an allocated MBUF from Pool.
*/ 			         
      IX_OSAL_MBUF_SET_USED_FLAG(currentMbufPtr);
#endif                             
	    /* Add it to the pool */
	    ixOsalMbufFree (currentMbufPtr);

	    /* flush the pool information to RAM */
	    IX_OSAL_CACHE_FLUSH (currentMbufPtr, mbufSizeAligned);
    }
    
    /*
     * update the number of free buffers in the pool 
     */
    poolPtr->freeBufsInPool = count;

#else 
/* Otherwise allocate buffers in a continuous block fashion */    
    poolBufPtr = IX_OSAL_MBUF_POOL_MBUF_AREA_ALLOC (count, mbufMemSize);
    IX_OSAL_ASSERT (poolBufPtr != NULL);
    poolDataPtr =
        IX_OSAL_MBUF_POOL_DATA_AREA_ALLOC (count, size, dataMemSize);
    IX_OSAL_ASSERT (poolDataPtr != NULL);

    poolPtr = ixOsalNoAllocPoolInit (poolBufPtr, poolDataPtr,
        count, size, name);
    if (poolPtr == NULL)
    {
        ixOsalLog (IX_OSAL_LOG_LVL_ERROR,
            IX_OSAL_LOG_DEV_STDOUT,
            "ixOsalPoolInit(): " "Fail to get pool ptr \n", 0, 0, 0, 0, 0, 0);
        return NULL;
    }

    poolPtr->poolAllocType = IX_OSAL_MBUF_POOL_TYPE_SYS_ALLOC;

#endif /* IX_OSAL_BUFFER_ALLOC_SEPARATELY */
    return poolPtr;
}

PUBLIC IX_OSAL_MBUF_POOL *
ixOsalNoAllocPoolInit (void *poolBufPtr,
    void *poolDataPtr, UINT32 count, UINT32 size, const char *name)
{
    UINT32 i,  mbufSizeAligned, sizeAligned;
    IX_OSAL_MBUF *currentMbufPtr = NULL;
    IX_OSAL_MBUF *nextMbufPtr = NULL;
    IX_OSAL_MBUF_POOL *poolPtr = NULL;

    /*
     * check parameters 
     */
    if (poolBufPtr == NULL)
    {
        ixOsalLog (IX_OSAL_LOG_LVL_ERROR,
            IX_OSAL_LOG_DEV_STDOUT,
            "ixOsalNoAllocPoolInit(): "
            "ERROR - NULL poolBufPtr \n", 0, 0, 0, 0, 0, 0);
        return NULL;
    }

    if (count <= 0)
    {
        ixOsalLog (IX_OSAL_LOG_LVL_ERROR,
            IX_OSAL_LOG_DEV_STDOUT,
            "ixOsalNoAllocPoolInit(): "
            "ERROR - count must > 0   \n", 0, 0, 0, 0, 0, 0);
        return NULL;
    }

    if (name == NULL)
    {
        ixOsalLog (IX_OSAL_LOG_LVL_ERROR,
            IX_OSAL_LOG_DEV_STDOUT,
            "ixOsalNoAllocPoolInit(): "
            "ERROR - NULL name ptr  \n", 0, 0, 0, 0, 0, 0);
        return NULL;
    }

    if (strlen (name) > IX_OSAL_MBUF_POOL_NAME_LEN)
    {
        ixOsalLog (IX_OSAL_LOG_LVL_ERROR,
            IX_OSAL_LOG_DEV_STDOUT,
            "ixOsalNoAllocPoolInit(): "
            "ERROR - name length should be no greater than %d  \n",
            IX_OSAL_MBUF_POOL_NAME_LEN, 0, 0, 0, 0, 0);
        return NULL;
    }

    poolPtr = ixOsalPoolAlloc ();

    if (poolPtr == NULL)
    {
        return NULL;
    }

    /*
     * Adjust sizes to ensure alignment on cache line boundaries 
     */
    mbufSizeAligned =
        IX_OSAL_MBUF_POOL_SIZE_ALIGN (sizeof (IX_OSAL_MBUF));
    /*
     * clear the mbuf memory area 
     */
    memset (poolBufPtr, 0, mbufSizeAligned * count);

    if (poolDataPtr != NULL)
    {
        /*
         * Adjust sizes to ensure alignment on cache line boundaries 
         */
        sizeAligned = IX_OSAL_MBUF_POOL_SIZE_ALIGN (size);
        /*
         * clear the data memory area 
         */
        memset (poolDataPtr, 0, sizeAligned * count);
    }
    else
    {
        sizeAligned = 0;
    }

    /*
     * initialise pool fields 
     */
    strcpy ((poolPtr)->name, name);

    poolPtr->dataMemPtr = poolDataPtr;
    poolPtr->mbufMemPtr = poolBufPtr;
    poolPtr->bufDataSize = sizeAligned;
    poolPtr->totalBufsInPool = count;
    poolPtr->mbufMemSize = mbufSizeAligned * count;
    poolPtr->dataMemSize = sizeAligned * count;

    currentMbufPtr = (IX_OSAL_MBUF *) poolBufPtr;

    poolPtr->nextFreeBuf = currentMbufPtr;

    for (i = 0; i < count; i++)
    {
        if (i < (count - 1))
        {
            nextMbufPtr =
                (IX_OSAL_MBUF *) ((unsigned) currentMbufPtr +
                mbufSizeAligned);
        }
        else
        {                       /* last mbuf in chain */
            nextMbufPtr = NULL;
        }
        IX_OSAL_MBUF_NEXT_BUFFER_IN_PKT_PTR (currentMbufPtr) = nextMbufPtr;
        IX_OSAL_MBUF_NET_POOL (currentMbufPtr) = poolPtr;

        IX_OSAL_MBUF_SYS_SIGNATURE_INIT(currentMbufPtr);

        if (poolDataPtr != NULL)
        {
            IX_OSAL_MBUF_MDATA (currentMbufPtr) = poolDataPtr;
            IX_OSAL_MBUF_ALLOCATED_BUFF_DATA(currentMbufPtr) = (UINT32) poolDataPtr;

            IX_OSAL_MBUF_MLEN (currentMbufPtr) = sizeAligned;
            IX_OSAL_MBUF_ALLOCATED_BUFF_LEN(currentMbufPtr) = sizeAligned;

            poolDataPtr = (void *) ((unsigned) poolDataPtr + sizeAligned);
        }

        currentMbufPtr = nextMbufPtr;
    }

    /*
     * update the number of free buffers in the pool 
     */
    poolPtr->freeBufsInPool = count;

    poolPtr->poolAllocType = IX_OSAL_MBUF_POOL_TYPE_USER_ALLOC;

    return poolPtr;
}

/* 
 * Get a mbuf ptr from the pool
 */
PUBLIC IX_OSAL_MBUF *
ixOsalMbufAlloc (IX_OSAL_MBUF_POOL * poolPtr)
{
    int lock;
    IX_OSAL_MBUF *newBufPtr = NULL;

    /*
     * check parameters 
     */
    if (poolPtr == NULL)
    {
        ixOsalLog (IX_OSAL_LOG_LVL_ERROR,
            IX_OSAL_LOG_DEV_STDOUT,
            "ixOsalMbufAlloc(): "
            "ERROR - Invalid Parameter\n", 0, 0, 0, 0, 0, 0);
        return NULL;
    }

    lock = ixOsalIrqLock ();

    newBufPtr = poolPtr->nextFreeBuf;
    if (newBufPtr)
    {
        poolPtr->nextFreeBuf =
            IX_OSAL_MBUF_NEXT_BUFFER_IN_PKT_PTR (newBufPtr);
        IX_OSAL_MBUF_NEXT_BUFFER_IN_PKT_PTR (newBufPtr) = NULL;

        /*
         * update the number of free buffers in the pool 
         */
        poolPtr->freeBufsInPool--;
    }
    else
    {
        /* Return NULL to indicate to caller that request is denied. */
        ixOsalIrqUnlock (lock);

        return NULL;
    }

#ifdef IX_OSAL_BUFFER_FREE_PROTECTION
	/* Set Buffer Used Flag to indicate state.*/
    IX_OSAL_MBUF_SET_USED_FLAG(newBufPtr);
#endif

    ixOsalIrqUnlock (lock);

    return newBufPtr;
}

PUBLIC IX_OSAL_MBUF *
ixOsalMbufFree (IX_OSAL_MBUF * bufPtr)
{
    int lock;
    IX_OSAL_MBUF_POOL *poolPtr;

    IX_OSAL_MBUF *nextBufPtr = NULL;

    /*
     * check parameters 
     */
    if (bufPtr == NULL)
    {
        ixOsalLog (IX_OSAL_LOG_LVL_ERROR,
            IX_OSAL_LOG_DEV_STDOUT,
            "ixOsalMbufFree(): "
            "ERROR - Invalid Parameter\n", 0, 0, 0, 0, 0, 0);
        return NULL;
    }



    lock = ixOsalIrqLock ();

#ifdef IX_OSAL_BUFFER_FREE_PROTECTION
	
	/* Prevention for Buffer freed more than once*/
    if(!IX_OSAL_MBUF_ISSET_USED_FLAG(bufPtr))
    {
   	return NULL;
    }
    IX_OSAL_MBUF_CLEAR_USED_FLAG(bufPtr);
#endif
	
    poolPtr = IX_OSAL_MBUF_NET_POOL (bufPtr);

    /*
     * check the mbuf wrapper signature (if mbuf wrapper was used) 
     */
    if (poolPtr->poolAllocType == IX_OSAL_MBUF_POOL_TYPE_SYS_ALLOC)
    {
        IX_OSAL_ENSURE ( (IX_OSAL_MBUF_GET_SYS_SIGNATURE(bufPtr) == IX_OSAL_MBUF_SYS_SIGNATURE),
            "ixOsalBuffPoolBufFree: ERROR - Invalid mbuf signature.");
    }

    nextBufPtr = IX_OSAL_MBUF_NEXT_BUFFER_IN_PKT_PTR (bufPtr);

    IX_OSAL_MBUF_NEXT_BUFFER_IN_PKT_PTR (bufPtr) = poolPtr->nextFreeBuf;
    poolPtr->nextFreeBuf = bufPtr;

    /*
     * update the number of free buffers in the pool 
     */
    poolPtr->freeBufsInPool++;

    ixOsalIrqUnlock (lock);

    return nextBufPtr;
}

PUBLIC void
ixOsalMbufChainFree (IX_OSAL_MBUF * bufPtr)
{
    while ((bufPtr = ixOsalMbufFree (bufPtr)));
}

/*
 * Function definition: ixOsalBuffPoolShow
 */
PUBLIC void
ixOsalMbufPoolShow (IX_OSAL_MBUF_POOL * poolPtr)
{
    IX_OSAL_MBUF *nextBufPtr;
    int count = 0;
    int lock;

    /*
     * check parameters 
     */
    if (poolPtr == NULL)
    {
        ixOsalLog (IX_OSAL_LOG_LVL_ERROR,
            IX_OSAL_LOG_DEV_STDOUT,
            "ixOsalBuffPoolShow(): "
            "ERROR - Invalid Parameter", 0, 0, 0, 0, 0, 0);
        /*
         * return IX_FAIL; 
         */
        return;
    }

    lock = ixOsalIrqLock ();
    count = poolPtr->freeBufsInPool;
    nextBufPtr = poolPtr->nextFreeBuf;
    ixOsalIrqUnlock (lock);

    ixOsalLog (IX_OSAL_LOG_LVL_MESSAGE,
        IX_OSAL_LOG_DEV_STDOUT, "=== POOL INFORMATION ===\n", 0, 0, 0,
        0, 0, 0);
    ixOsalLog (IX_OSAL_LOG_LVL_MESSAGE, IX_OSAL_LOG_DEV_STDOUT,
        "Pool Name:                   %s\n",
        (unsigned int) poolPtr->name, 0, 0, 0, 0, 0);
    ixOsalLog (IX_OSAL_LOG_LVL_MESSAGE, IX_OSAL_LOG_DEV_STDOUT,
        "Pool Allocation Type:        %d\n",
        (unsigned int) poolPtr->poolAllocType, 0, 0, 0, 0, 0);
    ixOsalLog (IX_OSAL_LOG_LVL_MESSAGE, IX_OSAL_LOG_DEV_STDOUT,
        "Pool Mbuf Mem Usage (bytes): %d\n",
        (unsigned int) poolPtr->mbufMemSize, 0, 0, 0, 0, 0);
    ixOsalLog (IX_OSAL_LOG_LVL_MESSAGE, IX_OSAL_LOG_DEV_STDOUT,
        "Pool Data Mem Usage (bytes): %d\n",
        (unsigned int) poolPtr->dataMemSize, 0, 0, 0, 0, 0);
    ixOsalLog (IX_OSAL_LOG_LVL_MESSAGE, IX_OSAL_LOG_DEV_STDOUT,
        "Mbuf Data Capacity  (bytes): %d\n",
        (unsigned int) poolPtr->bufDataSize, 0, 0, 0, 0, 0);
    ixOsalLog (IX_OSAL_LOG_LVL_MESSAGE, IX_OSAL_LOG_DEV_STDOUT,
        "Total Mbufs in Pool:         %d\n",
        (unsigned int) poolPtr->totalBufsInPool, 0, 0, 0, 0, 0);
    ixOsalLog (IX_OSAL_LOG_LVL_MESSAGE, IX_OSAL_LOG_DEV_STDOUT,
        "Available Mbufs:             %d\n", (unsigned int) count, 0,
        0, 0, 0, 0);
    ixOsalLog (IX_OSAL_LOG_LVL_MESSAGE, IX_OSAL_LOG_DEV_STDOUT,
        "Next Available Mbuf:         %p\n", (unsigned int) nextBufPtr,
        0, 0, 0, 0, 0);

    if (poolPtr->poolAllocType == IX_OSAL_MBUF_POOL_TYPE_USER_ALLOC)
    {
        ixOsalLog (IX_OSAL_LOG_LVL_MESSAGE,
            IX_OSAL_LOG_DEV_STDOUT,
            "Mbuf Mem Area Start address: %p\n",
            (unsigned int) poolPtr->mbufMemPtr, 0, 0, 0, 0, 0);
        ixOsalLog (IX_OSAL_LOG_LVL_MESSAGE, IX_OSAL_LOG_DEV_STDOUT,
            "Data Mem Area Start address: %p\n",
            (unsigned int) poolPtr->dataMemPtr, 0, 0, 0, 0, 0);
    }
}

PUBLIC void
ixOsalMbufDataPtrReset (IX_OSAL_MBUF * bufPtr)
{
    IX_OSAL_MBUF_POOL *poolPtr;
    UINT8 *poolDataPtr;

    if (bufPtr == NULL)
    {
        ixOsalLog (IX_OSAL_LOG_LVL_ERROR, IX_OSAL_LOG_DEV_STDOUT,
            "ixOsalBuffPoolBufDataPtrReset"
            ": ERROR - Invalid Parameter\n", 0, 0, 0, 0, 0, 0);
        return;
    }

    poolPtr = (IX_OSAL_MBUF_POOL *) IX_OSAL_MBUF_NET_POOL (bufPtr);
    poolDataPtr = poolPtr->dataMemPtr;

    if (poolPtr->poolAllocType == IX_OSAL_MBUF_POOL_TYPE_SYS_ALLOC)
    {
        if (IX_OSAL_MBUF_GET_SYS_SIGNATURE(bufPtr) != IX_OSAL_MBUF_SYS_SIGNATURE)
        {
            ixOsalLog (IX_OSAL_LOG_LVL_ERROR, IX_OSAL_LOG_DEV_STDOUT,
                "ixOsalBuffPoolBufDataPtrReset"
                ": invalid mbuf, cannot reset mData pointer\n", 0, 0,
                0, 0, 0, 0);
            return;
        }
        IX_OSAL_MBUF_MDATA (bufPtr) = (UINT8*)IX_OSAL_MBUF_ALLOCATED_BUFF_DATA (bufPtr);
    }
    else
    {
        if (poolDataPtr)
        {
            unsigned int bufSize = poolPtr->bufDataSize;
            unsigned int bufDataAddr =
                (unsigned int) IX_OSAL_MBUF_MDATA (bufPtr);
            unsigned int poolDataAddr = (unsigned int) poolDataPtr;

            /*
             * the pointer is still pointing somewhere in the mbuf payload.
             * This operation moves the pointer to the beginning of the 
             * mbuf payload
             */
            bufDataAddr = ((bufDataAddr - poolDataAddr) / bufSize) * bufSize;
            IX_OSAL_MBUF_MDATA (bufPtr) = &poolDataPtr[bufDataAddr];
        }
        else
        {
            ixOsalLog (IX_OSAL_LOG_LVL_WARNING, IX_OSAL_LOG_DEV_STDOUT,
                "ixOsalBuffPoolBufDataPtrReset"
                ": cannot be used if user supplied NULL pointer for pool data area "
                "when pool was created\n", 0, 0, 0, 0, 0, 0);
            return;
        }
    }

}

/*
 * Function definition: ixOsalBuffPoolUninit
 */
PUBLIC IX_STATUS
ixOsalBuffPoolUninit (IX_OSAL_MBUF_POOL * pool)
{
    if (!pool)
    {
        ixOsalLog (IX_OSAL_LOG_LVL_ERROR, IX_OSAL_LOG_DEV_STDOUT,
            "ixOsalBuffPoolUninit: NULL ptr \n", 0, 0, 0, 0, 0, 0);
        return IX_FAIL;
    }

    if (pool->freeBufsInPool != pool->totalBufsInPool)
    {
        ixOsalLog (IX_OSAL_LOG_LVL_ERROR, IX_OSAL_LOG_DEV_STDOUT,
            "ixOsalBuffPoolUninit: need to return all ptrs to the pool first! \n",
            0, 0, 0, 0, 0, 0);
        return IX_FAIL;
    }

    if (pool->poolAllocType == IX_OSAL_MBUF_POOL_TYPE_SYS_ALLOC)
    {
#ifdef IX_OSAL_BUFFER_ALLOC_SEPARATELY
				UINT32 i;
				IX_OSAL_MBUF* pBuf;
				
				pBuf = pool->nextFreeBuf;
				/* Freed the Buffer one by one till all the Memory is freed*/
				for (i= pool->freeBufsInPool; i >0 && pBuf!=NULL ;i--){
						IX_OSAL_MBUF* pBufTemp;
						pBufTemp = IX_OSAL_MBUF_NEXT_BUFFER_IN_PKT_PTR(pBuf);
						/* Freed MBUF Data Memory area*/
						IX_OSAL_CACHE_DMA_FREE( (void *) (IX_OSAL_MBUF_ALLOCATED_BUFF_DATA(pBuf)) );
						/* Freed MBUF Struct Memory area*/
						IX_OSAL_CACHE_DMA_FREE(pBuf);
						pBuf = pBufTemp;
				}
				
#else    	
        IX_OSAL_CACHE_DMA_FREE (pool->mbufMemPtr);
        IX_OSAL_CACHE_DMA_FREE (pool->dataMemPtr);
#endif        
    }

    ixOsalBuffFreePools[pool->poolIdx / IX_OSAL_BUFF_FREE_BITS] &=
        ~(1 << (pool->poolIdx % IX_OSAL_BUFF_FREE_BITS));
    ixOsalBuffPoolsInUse--;
    return IX_SUCCESS;
}

/*
 * Function definition: ixOsalBuffPoolDataAreaSizeGet
 */
PUBLIC UINT32
ixOsalBuffPoolDataAreaSizeGet (int count, int size)
{
    UINT32 memorySize;
    memorySize = count * IX_OSAL_MBUF_POOL_SIZE_ALIGN (size);
    return memorySize;
}

/*
 * Function definition: ixOsalBuffPoolMbufAreaSizeGet
 */
PUBLIC UINT32
ixOsalBuffPoolMbufAreaSizeGet (int count)
{
    UINT32 memorySize;
    memorySize =
        count * IX_OSAL_MBUF_POOL_SIZE_ALIGN (sizeof (IX_OSAL_MBUF));
    return memorySize;
}

/*
 * Function definition: ixOsalBuffPoolFreeCountGet
 */
PUBLIC UINT32 ixOsalBuffPoolFreeCountGet(IX_OSAL_MBUF_POOL * poolPtr)

{

   return poolPtr->freeBufsInPool;

}

#endif /* IX_OSAL_USE_DEFAULT_BUFFER_MGT */