summaryrefslogtreecommitdiff
path: root/drivers/scsi/lpfc/lpfc_mem.c
blob: 89cbeba06aeab675f9f81b86ba3f57ac53253f9b (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
/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channel Host Bus Adapters.                                *
 * Copyright (C) 2017-2022 Broadcom. All Rights Reserved. The term *
 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.     *
 * Copyright (C) 2004-2014 Emulex.  All rights reserved.           *
 * EMULEX and SLI are trademarks of Emulex.                        *
 * www.broadcom.com                                                *
 * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
 *                                                                 *
 * This program is free software; you can redistribute it and/or   *
 * modify it under the terms of version 2 of the GNU General       *
 * Public License as published by the Free Software Foundation.    *
 * This program is distributed in the hope that it will be useful. *
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
 * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
 * more details, a copy of which can be found in the file COPYING  *
 * included with this package.                                     *
 *******************************************************************/

#include <linux/mempool.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/interrupt.h>

#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_transport_fc.h>
#include <scsi/fc/fc_fs.h>

#include "lpfc_hw4.h"
#include "lpfc_hw.h"
#include "lpfc_sli.h"
#include "lpfc_sli4.h"
#include "lpfc_nl.h"
#include "lpfc_disc.h"
#include "lpfc.h"
#include "lpfc_scsi.h"
#include "lpfc_crtn.h"
#include "lpfc_logmsg.h"

#define LPFC_MBUF_POOL_SIZE     64      /* max elements in MBUF safety pool */
#define LPFC_MEM_POOL_SIZE      64      /* max elem in non-DMA safety pool */
#define LPFC_DEVICE_DATA_POOL_SIZE 64   /* max elements in device data pool */
#define LPFC_RRQ_POOL_SIZE	256	/* max elements in non-DMA  pool */
#define LPFC_MBX_POOL_SIZE	256	/* max elements in MBX non-DMA pool */

int
lpfc_mem_alloc_active_rrq_pool_s4(struct lpfc_hba *phba) {
	size_t bytes;
	int max_xri = phba->sli4_hba.max_cfg_param.max_xri;

	if (max_xri <= 0)
		return -ENOMEM;
	bytes = ((BITS_PER_LONG - 1 + max_xri) / BITS_PER_LONG) *
		  sizeof(unsigned long);
	phba->cfg_rrq_xri_bitmap_sz = bytes;
	phba->active_rrq_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
							    bytes);
	if (!phba->active_rrq_pool)
		return -ENOMEM;
	else
		return 0;
}

/**
 * lpfc_mem_alloc - create and allocate all PCI and memory pools
 * @phba: HBA to allocate pools for
 * @align: alignment requirement for blocks; must be a power of two
 *
 * Description: Creates and allocates PCI pools lpfc_mbuf_pool,
 * lpfc_hrb_pool.  Creates and allocates kmalloc-backed mempools
 * for LPFC_MBOXQ_t and lpfc_nodelist.  Also allocates the VPI bitmask.
 *
 * Notes: Not interrupt-safe.  Must be called with no locks held.  If any
 * allocation fails, frees all successfully allocated memory before returning.
 *
 * Returns:
 *   0 on success
 *   -ENOMEM on failure (if any memory allocations fail)
 **/
int
lpfc_mem_alloc(struct lpfc_hba *phba, int align)
{
	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
	int i;


	phba->lpfc_mbuf_pool = dma_pool_create("lpfc_mbuf_pool", &phba->pcidev->dev,
							LPFC_BPL_SIZE,
							align, 0);
	if (!phba->lpfc_mbuf_pool)
		goto fail;

	pool->elements = kmalloc_array(LPFC_MBUF_POOL_SIZE,
				       sizeof(struct lpfc_dmabuf),
				       GFP_KERNEL);
	if (!pool->elements)
		goto fail_free_lpfc_mbuf_pool;

	pool->max_count = 0;
	pool->current_count = 0;
	for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
		pool->elements[i].virt = dma_pool_alloc(phba->lpfc_mbuf_pool,
				       GFP_KERNEL, &pool->elements[i].phys);
		if (!pool->elements[i].virt)
			goto fail_free_mbuf_pool;
		pool->max_count++;
		pool->current_count++;
	}

	phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MBX_POOL_SIZE,
							  sizeof(LPFC_MBOXQ_t));
	if (!phba->mbox_mem_pool)
		goto fail_free_mbuf_pool;

	phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
						sizeof(struct lpfc_nodelist));
	if (!phba->nlp_mem_pool)
		goto fail_free_mbox_pool;

	if (phba->sli_rev == LPFC_SLI_REV4) {
		phba->rrq_pool =
			mempool_create_kmalloc_pool(LPFC_RRQ_POOL_SIZE,
						sizeof(struct lpfc_node_rrq));
		if (!phba->rrq_pool)
			goto fail_free_nlp_mem_pool;
		phba->lpfc_hrb_pool = dma_pool_create("lpfc_hrb_pool",
					      &phba->pcidev->dev,
					      LPFC_HDR_BUF_SIZE, align, 0);
		if (!phba->lpfc_hrb_pool)
			goto fail_free_rrq_mem_pool;

		phba->lpfc_drb_pool = dma_pool_create("lpfc_drb_pool",
					      &phba->pcidev->dev,
					      LPFC_DATA_BUF_SIZE, align, 0);
		if (!phba->lpfc_drb_pool)
			goto fail_free_hrb_pool;
		phba->lpfc_hbq_pool = NULL;
	} else {
		phba->lpfc_hbq_pool = dma_pool_create("lpfc_hbq_pool",
			&phba->pcidev->dev, LPFC_BPL_SIZE, align, 0);
		if (!phba->lpfc_hbq_pool)
			goto fail_free_nlp_mem_pool;
		phba->lpfc_hrb_pool = NULL;
		phba->lpfc_drb_pool = NULL;
	}

	if (phba->cfg_EnableXLane) {
		phba->device_data_mem_pool = mempool_create_kmalloc_pool(
					LPFC_DEVICE_DATA_POOL_SIZE,
					sizeof(struct lpfc_device_data));
		if (!phba->device_data_mem_pool)
			goto fail_free_drb_pool;
	} else {
		phba->device_data_mem_pool = NULL;
	}

	return 0;
fail_free_drb_pool:
	dma_pool_destroy(phba->lpfc_drb_pool);
	phba->lpfc_drb_pool = NULL;
 fail_free_hrb_pool:
	dma_pool_destroy(phba->lpfc_hrb_pool);
	phba->lpfc_hrb_pool = NULL;
 fail_free_rrq_mem_pool:
	mempool_destroy(phba->rrq_pool);
	phba->rrq_pool = NULL;
 fail_free_nlp_mem_pool:
	mempool_destroy(phba->nlp_mem_pool);
	phba->nlp_mem_pool = NULL;
 fail_free_mbox_pool:
	mempool_destroy(phba->mbox_mem_pool);
	phba->mbox_mem_pool = NULL;
 fail_free_mbuf_pool:
	while (i--)
		dma_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
						 pool->elements[i].phys);
	kfree(pool->elements);
 fail_free_lpfc_mbuf_pool:
	dma_pool_destroy(phba->lpfc_mbuf_pool);
	phba->lpfc_mbuf_pool = NULL;
 fail:
	return -ENOMEM;
}

int
lpfc_nvmet_mem_alloc(struct lpfc_hba *phba)
{
	phba->lpfc_nvmet_drb_pool =
		dma_pool_create("lpfc_nvmet_drb_pool",
				&phba->pcidev->dev, LPFC_NVMET_DATA_BUF_SIZE,
				SGL_ALIGN_SZ, 0);
	if (!phba->lpfc_nvmet_drb_pool) {
		lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
				"6024 Can't enable NVME Target - no memory\n");
		return -ENOMEM;
	}
	return 0;
}

/**
 * lpfc_mem_free - Frees memory allocated by lpfc_mem_alloc
 * @phba: HBA to free memory for
 *
 * Description: Free the memory allocated by lpfc_mem_alloc routine. This
 * routine is a the counterpart of lpfc_mem_alloc.
 *
 * Returns: None
 **/
void
lpfc_mem_free(struct lpfc_hba *phba)
{
	int i;
	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
	struct lpfc_device_data *device_data;

	/* Free HBQ pools */
	lpfc_sli_hbqbuf_free_all(phba);
	dma_pool_destroy(phba->lpfc_nvmet_drb_pool);
	phba->lpfc_nvmet_drb_pool = NULL;

	dma_pool_destroy(phba->lpfc_drb_pool);
	phba->lpfc_drb_pool = NULL;

	dma_pool_destroy(phba->lpfc_hrb_pool);
	phba->lpfc_hrb_pool = NULL;

	dma_pool_destroy(phba->lpfc_hbq_pool);
	phba->lpfc_hbq_pool = NULL;

	mempool_destroy(phba->rrq_pool);
	phba->rrq_pool = NULL;

	/* Free NLP memory pool */
	mempool_destroy(phba->nlp_mem_pool);
	phba->nlp_mem_pool = NULL;
	if (phba->sli_rev == LPFC_SLI_REV4 && phba->active_rrq_pool) {
		mempool_destroy(phba->active_rrq_pool);
		phba->active_rrq_pool = NULL;
	}

	/* Free mbox memory pool */
	mempool_destroy(phba->mbox_mem_pool);
	phba->mbox_mem_pool = NULL;

	/* Free MBUF memory pool */
	for (i = 0; i < pool->current_count; i++)
		dma_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
			      pool->elements[i].phys);
	kfree(pool->elements);

	dma_pool_destroy(phba->lpfc_mbuf_pool);
	phba->lpfc_mbuf_pool = NULL;

	/* Free Device Data memory pool */
	if (phba->device_data_mem_pool) {
		/* Ensure all objects have been returned to the pool */
		while (!list_empty(&phba->luns)) {
			device_data = list_first_entry(&phba->luns,
						       struct lpfc_device_data,
						       listentry);
			list_del(&device_data->listentry);
			mempool_free(device_data, phba->device_data_mem_pool);
		}
		mempool_destroy(phba->device_data_mem_pool);
	}
	phba->device_data_mem_pool = NULL;
	return;
}

/**
 * lpfc_mem_free_all - Frees all PCI and driver memory
 * @phba: HBA to free memory for
 *
 * Description: Free memory from PCI and driver memory pools and also those
 * used : lpfc_sg_dma_buf_pool, lpfc_mbuf_pool, lpfc_hrb_pool. Frees
 * kmalloc-backed mempools for LPFC_MBOXQ_t and lpfc_nodelist. Also frees
 * the VPI bitmask.
 *
 * Returns: None
 **/
void
lpfc_mem_free_all(struct lpfc_hba *phba)
{
	struct lpfc_sli *psli = &phba->sli;
	LPFC_MBOXQ_t *mbox, *next_mbox;
	struct lpfc_dmabuf   *mp;

	/* Free memory used in mailbox queue back to mailbox memory pool */
	list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
		mp = (struct lpfc_dmabuf *)(mbox->ctx_buf);
		if (mp) {
			lpfc_mbuf_free(phba, mp->virt, mp->phys);
			kfree(mp);
		}
		list_del(&mbox->list);
		mempool_free(mbox, phba->mbox_mem_pool);
	}
	/* Free memory used in mailbox cmpl list back to mailbox memory pool */
	list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq_cmpl, list) {
		mp = (struct lpfc_dmabuf *)(mbox->ctx_buf);
		if (mp) {
			lpfc_mbuf_free(phba, mp->virt, mp->phys);
			kfree(mp);
		}
		list_del(&mbox->list);
		mempool_free(mbox, phba->mbox_mem_pool);
	}
	/* Free the active mailbox command back to the mailbox memory pool */
	spin_lock_irq(&phba->hbalock);
	psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
	spin_unlock_irq(&phba->hbalock);
	if (psli->mbox_active) {
		mbox = psli->mbox_active;
		mp = (struct lpfc_dmabuf *)(mbox->ctx_buf);
		if (mp) {
			lpfc_mbuf_free(phba, mp->virt, mp->phys);
			kfree(mp);
		}
		mempool_free(mbox, phba->mbox_mem_pool);
		psli->mbox_active = NULL;
	}

	/* Free and destroy all the allocated memory pools */
	lpfc_mem_free(phba);

	/* Free DMA buffer memory pool */
	dma_pool_destroy(phba->lpfc_sg_dma_buf_pool);
	phba->lpfc_sg_dma_buf_pool = NULL;

	dma_pool_destroy(phba->lpfc_cmd_rsp_buf_pool);
	phba->lpfc_cmd_rsp_buf_pool = NULL;

	/* Free Congestion Data buffer */
	if (phba->cgn_i) {
		dma_free_coherent(&phba->pcidev->dev,
				  sizeof(struct lpfc_cgn_info),
				  phba->cgn_i->virt, phba->cgn_i->phys);
		kfree(phba->cgn_i);
		phba->cgn_i = NULL;
	}

	/* Free RX Monitor */
	if (phba->rx_monitor) {
		lpfc_rx_monitor_destroy_ring(phba->rx_monitor);
		kfree(phba->rx_monitor);
		phba->rx_monitor = NULL;
	}

	/* Free the iocb lookup array */
	kfree(psli->iocbq_lookup);
	psli->iocbq_lookup = NULL;

	return;
}

/**
 * lpfc_mbuf_alloc - Allocate an mbuf from the lpfc_mbuf_pool PCI pool
 * @phba: HBA which owns the pool to allocate from
 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation
 * @handle: used to return the DMA-mapped address of the mbuf
 *
 * Description: Allocates a DMA-mapped buffer from the lpfc_mbuf_pool PCI pool.
 * Allocates from generic dma_pool_alloc function first and if that fails and
 * mem_flags has MEM_PRI set (the only defined flag), returns an mbuf from the
 * HBA's pool.
 *
 * Notes: Not interrupt-safe.  Must be called with no locks held.  Takes
 * phba->hbalock.
 *
 * Returns:
 *   pointer to the allocated mbuf on success
 *   NULL on failure
 **/
void *
lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
{
	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
	unsigned long iflags;
	void *ret;

	ret = dma_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);

	spin_lock_irqsave(&phba->hbalock, iflags);
	if (!ret && (mem_flags & MEM_PRI) && pool->current_count) {
		pool->current_count--;
		ret = pool->elements[pool->current_count].virt;
		*handle = pool->elements[pool->current_count].phys;
	}
	spin_unlock_irqrestore(&phba->hbalock, iflags);
	return ret;
}

/**
 * __lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (locked)
 * @phba: HBA which owns the pool to return to
 * @virt: mbuf to free
 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
 *
 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
 * it is below its max_count, frees the mbuf otherwise.
 *
 * Notes: Must be called with phba->hbalock held to synchronize access to
 * lpfc_mbuf_safety_pool.
 *
 * Returns: None
 **/
void
__lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
{
	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;

	if (pool->current_count < pool->max_count) {
		pool->elements[pool->current_count].virt = virt;
		pool->elements[pool->current_count].phys = dma;
		pool->current_count++;
	} else {
		dma_pool_free(phba->lpfc_mbuf_pool, virt, dma);
	}
	return;
}

/**
 * lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (unlocked)
 * @phba: HBA which owns the pool to return to
 * @virt: mbuf to free
 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
 *
 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
 * it is below its max_count, frees the mbuf otherwise.
 *
 * Notes: Takes phba->hbalock.  Can be called with or without other locks held.
 *
 * Returns: None
 **/
void
lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
{
	unsigned long iflags;

	spin_lock_irqsave(&phba->hbalock, iflags);
	__lpfc_mbuf_free(phba, virt, dma);
	spin_unlock_irqrestore(&phba->hbalock, iflags);
	return;
}

/**
 * lpfc_nvmet_buf_alloc - Allocate an nvmet_buf from the
 * lpfc_sg_dma_buf_pool PCI pool
 * @phba: HBA which owns the pool to allocate from
 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation
 * @handle: used to return the DMA-mapped address of the nvmet_buf
 *
 * Description: Allocates a DMA-mapped buffer from the lpfc_sg_dma_buf_pool
 * PCI pool.  Allocates from generic dma_pool_alloc function.
 *
 * Returns:
 *   pointer to the allocated nvmet_buf on success
 *   NULL on failure
 **/
void *
lpfc_nvmet_buf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
{
	void *ret;

	ret = dma_pool_alloc(phba->lpfc_sg_dma_buf_pool, GFP_KERNEL, handle);
	return ret;
}

/**
 * lpfc_nvmet_buf_free - Free an nvmet_buf from the lpfc_sg_dma_buf_pool
 * PCI pool
 * @phba: HBA which owns the pool to return to
 * @virt: nvmet_buf to free
 * @dma: the DMA-mapped address of the lpfc_sg_dma_buf_pool to be freed
 *
 * Returns: None
 **/
void
lpfc_nvmet_buf_free(struct lpfc_hba *phba, void *virt, dma_addr_t dma)
{
	dma_pool_free(phba->lpfc_sg_dma_buf_pool, virt, dma);
}

/**
 * lpfc_els_hbq_alloc - Allocate an HBQ buffer
 * @phba: HBA to allocate HBQ buffer for
 *
 * Description: Allocates a DMA-mapped HBQ buffer from the lpfc_hrb_pool PCI
 * pool along a non-DMA-mapped container for it.
 *
 * Notes: Not interrupt-safe.  Must be called with no locks held.
 *
 * Returns:
 *   pointer to HBQ on success
 *   NULL on failure
 **/
struct hbq_dmabuf *
lpfc_els_hbq_alloc(struct lpfc_hba *phba)
{
	struct hbq_dmabuf *hbqbp;

	hbqbp = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
	if (!hbqbp)
		return NULL;

	hbqbp->dbuf.virt = dma_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL,
					  &hbqbp->dbuf.phys);
	if (!hbqbp->dbuf.virt) {
		kfree(hbqbp);
		return NULL;
	}
	hbqbp->total_size = LPFC_BPL_SIZE;
	return hbqbp;
}

/**
 * lpfc_els_hbq_free - Frees an HBQ buffer allocated with lpfc_els_hbq_alloc
 * @phba: HBA buffer was allocated for
 * @hbqbp: HBQ container returned by lpfc_els_hbq_alloc
 *
 * Description: Frees both the container and the DMA-mapped buffer returned by
 * lpfc_els_hbq_alloc.
 *
 * Notes: Can be called with or without locks held.
 *
 * Returns: None
 **/
void
lpfc_els_hbq_free(struct lpfc_hba *phba, struct hbq_dmabuf *hbqbp)
{
	dma_pool_free(phba->lpfc_hbq_pool, hbqbp->dbuf.virt, hbqbp->dbuf.phys);
	kfree(hbqbp);
	return;
}

/**
 * lpfc_sli4_rb_alloc - Allocate an SLI4 Receive buffer
 * @phba: HBA to allocate a receive buffer for
 *
 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI
 * pool along a non-DMA-mapped container for it.
 *
 * Notes: Not interrupt-safe.  Must be called with no locks held.
 *
 * Returns:
 *   pointer to HBQ on success
 *   NULL on failure
 **/
struct hbq_dmabuf *
lpfc_sli4_rb_alloc(struct lpfc_hba *phba)
{
	struct hbq_dmabuf *dma_buf;

	dma_buf = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
	if (!dma_buf)
		return NULL;

	dma_buf->hbuf.virt = dma_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL,
					    &dma_buf->hbuf.phys);
	if (!dma_buf->hbuf.virt) {
		kfree(dma_buf);
		return NULL;
	}
	dma_buf->dbuf.virt = dma_pool_alloc(phba->lpfc_drb_pool, GFP_KERNEL,
					    &dma_buf->dbuf.phys);
	if (!dma_buf->dbuf.virt) {
		dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
			      dma_buf->hbuf.phys);
		kfree(dma_buf);
		return NULL;
	}
	dma_buf->total_size = LPFC_DATA_BUF_SIZE;
	return dma_buf;
}

/**
 * lpfc_sli4_rb_free - Frees a receive buffer
 * @phba: HBA buffer was allocated for
 * @dmab: DMA Buffer container returned by lpfc_sli4_hbq_alloc
 *
 * Description: Frees both the container and the DMA-mapped buffers returned by
 * lpfc_sli4_rb_alloc.
 *
 * Notes: Can be called with or without locks held.
 *
 * Returns: None
 **/
void
lpfc_sli4_rb_free(struct lpfc_hba *phba, struct hbq_dmabuf *dmab)
{
	dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys);
	dma_pool_free(phba->lpfc_drb_pool, dmab->dbuf.virt, dmab->dbuf.phys);
	kfree(dmab);
}

/**
 * lpfc_sli4_nvmet_alloc - Allocate an SLI4 Receive buffer
 * @phba: HBA to allocate a receive buffer for
 *
 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI
 * pool along a non-DMA-mapped container for it.
 *
 * Returns:
 *   pointer to HBQ on success
 *   NULL on failure
 **/
struct rqb_dmabuf *
lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba)
{
	struct rqb_dmabuf *dma_buf;

	dma_buf = kzalloc(sizeof(*dma_buf), GFP_KERNEL);
	if (!dma_buf)
		return NULL;

	dma_buf->hbuf.virt = dma_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL,
					    &dma_buf->hbuf.phys);
	if (!dma_buf->hbuf.virt) {
		kfree(dma_buf);
		return NULL;
	}
	dma_buf->dbuf.virt = dma_pool_alloc(phba->lpfc_nvmet_drb_pool,
					    GFP_KERNEL, &dma_buf->dbuf.phys);
	if (!dma_buf->dbuf.virt) {
		dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
			      dma_buf->hbuf.phys);
		kfree(dma_buf);
		return NULL;
	}
	dma_buf->total_size = LPFC_NVMET_DATA_BUF_SIZE;
	return dma_buf;
}

/**
 * lpfc_sli4_nvmet_free - Frees a receive buffer
 * @phba: HBA buffer was allocated for
 * @dmab: DMA Buffer container returned by lpfc_sli4_rbq_alloc
 *
 * Description: Frees both the container and the DMA-mapped buffers returned by
 * lpfc_sli4_nvmet_alloc.
 *
 * Notes: Can be called with or without locks held.
 *
 * Returns: None
 **/
void
lpfc_sli4_nvmet_free(struct lpfc_hba *phba, struct rqb_dmabuf *dmab)
{
	dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys);
	dma_pool_free(phba->lpfc_nvmet_drb_pool,
		      dmab->dbuf.virt, dmab->dbuf.phys);
	kfree(dmab);
}

/**
 * lpfc_in_buf_free - Free a DMA buffer
 * @phba: HBA buffer is associated with
 * @mp: Buffer to free
 *
 * Description: Frees the given DMA buffer in the appropriate way given if the
 * HBA is running in SLI3 mode with HBQs enabled.
 *
 * Notes: Takes phba->hbalock.  Can be called with or without other locks held.
 *
 * Returns: None
 **/
void
lpfc_in_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
{
	struct hbq_dmabuf *hbq_entry;
	unsigned long flags;

	if (!mp)
		return;

	if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
		hbq_entry = container_of(mp, struct hbq_dmabuf, dbuf);
		/* Check whether HBQ is still in use */
		spin_lock_irqsave(&phba->hbalock, flags);
		if (!phba->hbq_in_use) {
			spin_unlock_irqrestore(&phba->hbalock, flags);
			return;
		}
		list_del(&hbq_entry->dbuf.list);
		if (hbq_entry->tag == -1) {
			(phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer)
				(phba, hbq_entry);
		} else {
			lpfc_sli_free_hbq(phba, hbq_entry);
		}
		spin_unlock_irqrestore(&phba->hbalock, flags);
	} else {
		lpfc_mbuf_free(phba, mp->virt, mp->phys);
		kfree(mp);
	}
	return;
}

/**
 * lpfc_rq_buf_free - Free a RQ DMA buffer
 * @phba: HBA buffer is associated with
 * @mp: Buffer to free
 *
 * Description: Frees the given DMA buffer in the appropriate way given by
 * reposting it to its associated RQ so it can be reused.
 *
 * Notes: Takes phba->hbalock.  Can be called with or without other locks held.
 *
 * Returns: None
 **/
void
lpfc_rq_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
{
	struct lpfc_rqb *rqbp;
	struct lpfc_rqe hrqe;
	struct lpfc_rqe drqe;
	struct rqb_dmabuf *rqb_entry;
	unsigned long flags;
	int rc;

	if (!mp)
		return;

	rqb_entry = container_of(mp, struct rqb_dmabuf, hbuf);
	rqbp = rqb_entry->hrq->rqbp;

	spin_lock_irqsave(&phba->hbalock, flags);
	list_del(&rqb_entry->hbuf.list);
	hrqe.address_lo = putPaddrLow(rqb_entry->hbuf.phys);
	hrqe.address_hi = putPaddrHigh(rqb_entry->hbuf.phys);
	drqe.address_lo = putPaddrLow(rqb_entry->dbuf.phys);
	drqe.address_hi = putPaddrHigh(rqb_entry->dbuf.phys);
	rc = lpfc_sli4_rq_put(rqb_entry->hrq, rqb_entry->drq, &hrqe, &drqe);
	if (rc < 0) {
		lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
				"6409 Cannot post to HRQ %d: %x %x %x "
				"DRQ %x %x\n",
				rqb_entry->hrq->queue_id,
				rqb_entry->hrq->host_index,
				rqb_entry->hrq->hba_index,
				rqb_entry->hrq->entry_count,
				rqb_entry->drq->host_index,
				rqb_entry->drq->hba_index);
		(rqbp->rqb_free_buffer)(phba, rqb_entry);
	} else {
		list_add_tail(&rqb_entry->hbuf.list, &rqbp->rqb_buffer_list);
		rqbp->buffer_count++;
	}

	spin_unlock_irqrestore(&phba->hbalock, flags);
}