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/drivers/scsi/lpfc/lpfc_mem.c

http://github.com/mirrors/linux
C | 743 lines | 439 code | 67 blank | 237 comment | 53 complexity | 478ad4ceaed514413d23c38664885710 MD5 | raw file
  1/*******************************************************************
  2 * This file is part of the Emulex Linux Device Driver for         *
  3 * Fibre Channel Host Bus Adapters.                                *
  4 * Copyright (C) 2017-2018 Broadcom. All Rights Reserved. The term *
  5 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.     *
  6 * Copyright (C) 2004-2014 Emulex.  All rights reserved.           *
  7 * EMULEX and SLI are trademarks of Emulex.                        *
  8 * www.broadcom.com                                                *
  9 * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
 10 *                                                                 *
 11 * This program is free software; you can redistribute it and/or   *
 12 * modify it under the terms of version 2 of the GNU General       *
 13 * Public License as published by the Free Software Foundation.    *
 14 * This program is distributed in the hope that it will be useful. *
 15 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
 16 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
 17 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
 18 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
 19 * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
 20 * more details, a copy of which can be found in the file COPYING  *
 21 * included with this package.                                     *
 22 *******************************************************************/
 23
 24#include <linux/mempool.h>
 25#include <linux/slab.h>
 26#include <linux/pci.h>
 27#include <linux/interrupt.h>
 28
 29#include <scsi/scsi.h>
 30#include <scsi/scsi_device.h>
 31#include <scsi/scsi_transport_fc.h>
 32#include <scsi/fc/fc_fs.h>
 33
 34#include <linux/nvme-fc-driver.h>
 35
 36#include "lpfc_hw4.h"
 37#include "lpfc_hw.h"
 38#include "lpfc_sli.h"
 39#include "lpfc_sli4.h"
 40#include "lpfc_nl.h"
 41#include "lpfc_disc.h"
 42#include "lpfc.h"
 43#include "lpfc_scsi.h"
 44#include "lpfc_nvme.h"
 45#include "lpfc_nvmet.h"
 46#include "lpfc_crtn.h"
 47#include "lpfc_logmsg.h"
 48
 49#define LPFC_MBUF_POOL_SIZE     64      /* max elements in MBUF safety pool */
 50#define LPFC_MEM_POOL_SIZE      64      /* max elem in non-DMA safety pool */
 51#define LPFC_DEVICE_DATA_POOL_SIZE 64   /* max elements in device data pool */
 52
 53int
 54lpfc_mem_alloc_active_rrq_pool_s4(struct lpfc_hba *phba) {
 55	size_t bytes;
 56	int max_xri = phba->sli4_hba.max_cfg_param.max_xri;
 57
 58	if (max_xri <= 0)
 59		return -ENOMEM;
 60	bytes = ((BITS_PER_LONG - 1 + max_xri) / BITS_PER_LONG) *
 61		  sizeof(unsigned long);
 62	phba->cfg_rrq_xri_bitmap_sz = bytes;
 63	phba->active_rrq_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
 64							    bytes);
 65	if (!phba->active_rrq_pool)
 66		return -ENOMEM;
 67	else
 68		return 0;
 69}
 70
 71/**
 72 * lpfc_mem_alloc - create and allocate all PCI and memory pools
 73 * @phba: HBA to allocate pools for
 74 *
 75 * Description: Creates and allocates PCI pools lpfc_mbuf_pool,
 76 * lpfc_hrb_pool.  Creates and allocates kmalloc-backed mempools
 77 * for LPFC_MBOXQ_t and lpfc_nodelist.  Also allocates the VPI bitmask.
 78 *
 79 * Notes: Not interrupt-safe.  Must be called with no locks held.  If any
 80 * allocation fails, frees all successfully allocated memory before returning.
 81 *
 82 * Returns:
 83 *   0 on success
 84 *   -ENOMEM on failure (if any memory allocations fail)
 85 **/
 86int
 87lpfc_mem_alloc(struct lpfc_hba *phba, int align)
 88{
 89	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 90	int i;
 91
 92
 93	phba->lpfc_mbuf_pool = dma_pool_create("lpfc_mbuf_pool", &phba->pcidev->dev,
 94							LPFC_BPL_SIZE,
 95							align, 0);
 96	if (!phba->lpfc_mbuf_pool)
 97		goto fail;
 98
 99	pool->elements = kmalloc_array(LPFC_MBUF_POOL_SIZE,
100				       sizeof(struct lpfc_dmabuf),
101				       GFP_KERNEL);
102	if (!pool->elements)
103		goto fail_free_lpfc_mbuf_pool;
104
105	pool->max_count = 0;
106	pool->current_count = 0;
107	for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
108		pool->elements[i].virt = dma_pool_alloc(phba->lpfc_mbuf_pool,
109				       GFP_KERNEL, &pool->elements[i].phys);
110		if (!pool->elements[i].virt)
111			goto fail_free_mbuf_pool;
112		pool->max_count++;
113		pool->current_count++;
114	}
115
116	phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
117							 sizeof(LPFC_MBOXQ_t));
118	if (!phba->mbox_mem_pool)
119		goto fail_free_mbuf_pool;
120
121	phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
122						sizeof(struct lpfc_nodelist));
123	if (!phba->nlp_mem_pool)
124		goto fail_free_mbox_pool;
125
126	if (phba->sli_rev == LPFC_SLI_REV4) {
127		phba->rrq_pool =
128			mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
129						sizeof(struct lpfc_node_rrq));
130		if (!phba->rrq_pool)
131			goto fail_free_nlp_mem_pool;
132		phba->lpfc_hrb_pool = dma_pool_create("lpfc_hrb_pool",
133					      &phba->pcidev->dev,
134					      LPFC_HDR_BUF_SIZE, align, 0);
135		if (!phba->lpfc_hrb_pool)
136			goto fail_free_rrq_mem_pool;
137
138		phba->lpfc_drb_pool = dma_pool_create("lpfc_drb_pool",
139					      &phba->pcidev->dev,
140					      LPFC_DATA_BUF_SIZE, align, 0);
141		if (!phba->lpfc_drb_pool)
142			goto fail_free_hrb_pool;
143		phba->lpfc_hbq_pool = NULL;
144	} else {
145		phba->lpfc_hbq_pool = dma_pool_create("lpfc_hbq_pool",
146			&phba->pcidev->dev, LPFC_BPL_SIZE, align, 0);
147		if (!phba->lpfc_hbq_pool)
148			goto fail_free_nlp_mem_pool;
149		phba->lpfc_hrb_pool = NULL;
150		phba->lpfc_drb_pool = NULL;
151	}
152
153	if (phba->cfg_EnableXLane) {
154		phba->device_data_mem_pool = mempool_create_kmalloc_pool(
155					LPFC_DEVICE_DATA_POOL_SIZE,
156					sizeof(struct lpfc_device_data));
157		if (!phba->device_data_mem_pool)
158			goto fail_free_drb_pool;
159	} else {
160		phba->device_data_mem_pool = NULL;
161	}
162
163	return 0;
164fail_free_drb_pool:
165	dma_pool_destroy(phba->lpfc_drb_pool);
166	phba->lpfc_drb_pool = NULL;
167 fail_free_hrb_pool:
168	dma_pool_destroy(phba->lpfc_hrb_pool);
169	phba->lpfc_hrb_pool = NULL;
170 fail_free_rrq_mem_pool:
171	mempool_destroy(phba->rrq_pool);
172	phba->rrq_pool = NULL;
173 fail_free_nlp_mem_pool:
174	mempool_destroy(phba->nlp_mem_pool);
175	phba->nlp_mem_pool = NULL;
176 fail_free_mbox_pool:
177	mempool_destroy(phba->mbox_mem_pool);
178	phba->mbox_mem_pool = NULL;
179 fail_free_mbuf_pool:
180	while (i--)
181		dma_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
182						 pool->elements[i].phys);
183	kfree(pool->elements);
184 fail_free_lpfc_mbuf_pool:
185	dma_pool_destroy(phba->lpfc_mbuf_pool);
186	phba->lpfc_mbuf_pool = NULL;
187 fail:
188	return -ENOMEM;
189}
190
191int
192lpfc_nvmet_mem_alloc(struct lpfc_hba *phba)
193{
194	phba->lpfc_nvmet_drb_pool =
195		dma_pool_create("lpfc_nvmet_drb_pool",
196				&phba->pcidev->dev, LPFC_NVMET_DATA_BUF_SIZE,
197				SGL_ALIGN_SZ, 0);
198	if (!phba->lpfc_nvmet_drb_pool) {
199		lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
200				"6024 Can't enable NVME Target - no memory\n");
201		return -ENOMEM;
202	}
203	return 0;
204}
205
206/**
207 * lpfc_mem_free - Frees memory allocated by lpfc_mem_alloc
208 * @phba: HBA to free memory for
209 *
210 * Description: Free the memory allocated by lpfc_mem_alloc routine. This
211 * routine is a the counterpart of lpfc_mem_alloc.
212 *
213 * Returns: None
214 **/
215void
216lpfc_mem_free(struct lpfc_hba *phba)
217{
218	int i;
219	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
220	struct lpfc_device_data *device_data;
221
222	/* Free HBQ pools */
223	lpfc_sli_hbqbuf_free_all(phba);
224	dma_pool_destroy(phba->lpfc_nvmet_drb_pool);
225	phba->lpfc_nvmet_drb_pool = NULL;
226
227	dma_pool_destroy(phba->lpfc_drb_pool);
228	phba->lpfc_drb_pool = NULL;
229
230	dma_pool_destroy(phba->lpfc_hrb_pool);
231	phba->lpfc_hrb_pool = NULL;
232
233	dma_pool_destroy(phba->lpfc_hbq_pool);
234	phba->lpfc_hbq_pool = NULL;
235
236	mempool_destroy(phba->rrq_pool);
237	phba->rrq_pool = NULL;
238
239	/* Free NLP memory pool */
240	mempool_destroy(phba->nlp_mem_pool);
241	phba->nlp_mem_pool = NULL;
242	if (phba->sli_rev == LPFC_SLI_REV4 && phba->active_rrq_pool) {
243		mempool_destroy(phba->active_rrq_pool);
244		phba->active_rrq_pool = NULL;
245	}
246
247	/* Free mbox memory pool */
248	mempool_destroy(phba->mbox_mem_pool);
249	phba->mbox_mem_pool = NULL;
250
251	/* Free MBUF memory pool */
252	for (i = 0; i < pool->current_count; i++)
253		dma_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
254			      pool->elements[i].phys);
255	kfree(pool->elements);
256
257	dma_pool_destroy(phba->lpfc_mbuf_pool);
258	phba->lpfc_mbuf_pool = NULL;
259
260	/* Free Device Data memory pool */
261	if (phba->device_data_mem_pool) {
262		/* Ensure all objects have been returned to the pool */
263		while (!list_empty(&phba->luns)) {
264			device_data = list_first_entry(&phba->luns,
265						       struct lpfc_device_data,
266						       listentry);
267			list_del(&device_data->listentry);
268			mempool_free(device_data, phba->device_data_mem_pool);
269		}
270		mempool_destroy(phba->device_data_mem_pool);
271	}
272	phba->device_data_mem_pool = NULL;
273	return;
274}
275
276/**
277 * lpfc_mem_free_all - Frees all PCI and driver memory
278 * @phba: HBA to free memory for
279 *
280 * Description: Free memory from PCI and driver memory pools and also those
281 * used : lpfc_sg_dma_buf_pool, lpfc_mbuf_pool, lpfc_hrb_pool. Frees
282 * kmalloc-backed mempools for LPFC_MBOXQ_t and lpfc_nodelist. Also frees
283 * the VPI bitmask.
284 *
285 * Returns: None
286 **/
287void
288lpfc_mem_free_all(struct lpfc_hba *phba)
289{
290	struct lpfc_sli *psli = &phba->sli;
291	LPFC_MBOXQ_t *mbox, *next_mbox;
292	struct lpfc_dmabuf   *mp;
293
294	/* Free memory used in mailbox queue back to mailbox memory pool */
295	list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
296		mp = (struct lpfc_dmabuf *)(mbox->ctx_buf);
297		if (mp) {
298			lpfc_mbuf_free(phba, mp->virt, mp->phys);
299			kfree(mp);
300		}
301		list_del(&mbox->list);
302		mempool_free(mbox, phba->mbox_mem_pool);
303	}
304	/* Free memory used in mailbox cmpl list back to mailbox memory pool */
305	list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq_cmpl, list) {
306		mp = (struct lpfc_dmabuf *)(mbox->ctx_buf);
307		if (mp) {
308			lpfc_mbuf_free(phba, mp->virt, mp->phys);
309			kfree(mp);
310		}
311		list_del(&mbox->list);
312		mempool_free(mbox, phba->mbox_mem_pool);
313	}
314	/* Free the active mailbox command back to the mailbox memory pool */
315	spin_lock_irq(&phba->hbalock);
316	psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
317	spin_unlock_irq(&phba->hbalock);
318	if (psli->mbox_active) {
319		mbox = psli->mbox_active;
320		mp = (struct lpfc_dmabuf *)(mbox->ctx_buf);
321		if (mp) {
322			lpfc_mbuf_free(phba, mp->virt, mp->phys);
323			kfree(mp);
324		}
325		mempool_free(mbox, phba->mbox_mem_pool);
326		psli->mbox_active = NULL;
327	}
328
329	/* Free and destroy all the allocated memory pools */
330	lpfc_mem_free(phba);
331
332	/* Free DMA buffer memory pool */
333	dma_pool_destroy(phba->lpfc_sg_dma_buf_pool);
334	phba->lpfc_sg_dma_buf_pool = NULL;
335
336	dma_pool_destroy(phba->lpfc_cmd_rsp_buf_pool);
337	phba->lpfc_cmd_rsp_buf_pool = NULL;
338
339	/* Free the iocb lookup array */
340	kfree(psli->iocbq_lookup);
341	psli->iocbq_lookup = NULL;
342
343	return;
344}
345
346/**
347 * lpfc_mbuf_alloc - Allocate an mbuf from the lpfc_mbuf_pool PCI pool
348 * @phba: HBA which owns the pool to allocate from
349 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation
350 * @handle: used to return the DMA-mapped address of the mbuf
351 *
352 * Description: Allocates a DMA-mapped buffer from the lpfc_mbuf_pool PCI pool.
353 * Allocates from generic dma_pool_alloc function first and if that fails and
354 * mem_flags has MEM_PRI set (the only defined flag), returns an mbuf from the
355 * HBA's pool.
356 *
357 * Notes: Not interrupt-safe.  Must be called with no locks held.  Takes
358 * phba->hbalock.
359 *
360 * Returns:
361 *   pointer to the allocated mbuf on success
362 *   NULL on failure
363 **/
364void *
365lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
366{
367	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
368	unsigned long iflags;
369	void *ret;
370
371	ret = dma_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);
372
373	spin_lock_irqsave(&phba->hbalock, iflags);
374	if (!ret && (mem_flags & MEM_PRI) && pool->current_count) {
375		pool->current_count--;
376		ret = pool->elements[pool->current_count].virt;
377		*handle = pool->elements[pool->current_count].phys;
378	}
379	spin_unlock_irqrestore(&phba->hbalock, iflags);
380	return ret;
381}
382
383/**
384 * __lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (locked)
385 * @phba: HBA which owns the pool to return to
386 * @virt: mbuf to free
387 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
388 *
389 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
390 * it is below its max_count, frees the mbuf otherwise.
391 *
392 * Notes: Must be called with phba->hbalock held to synchronize access to
393 * lpfc_mbuf_safety_pool.
394 *
395 * Returns: None
396 **/
397void
398__lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
399{
400	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
401
402	if (pool->current_count < pool->max_count) {
403		pool->elements[pool->current_count].virt = virt;
404		pool->elements[pool->current_count].phys = dma;
405		pool->current_count++;
406	} else {
407		dma_pool_free(phba->lpfc_mbuf_pool, virt, dma);
408	}
409	return;
410}
411
412/**
413 * lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (unlocked)
414 * @phba: HBA which owns the pool to return to
415 * @virt: mbuf to free
416 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
417 *
418 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
419 * it is below its max_count, frees the mbuf otherwise.
420 *
421 * Notes: Takes phba->hbalock.  Can be called with or without other locks held.
422 *
423 * Returns: None
424 **/
425void
426lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
427{
428	unsigned long iflags;
429
430	spin_lock_irqsave(&phba->hbalock, iflags);
431	__lpfc_mbuf_free(phba, virt, dma);
432	spin_unlock_irqrestore(&phba->hbalock, iflags);
433	return;
434}
435
436/**
437 * lpfc_nvmet_buf_alloc - Allocate an nvmet_buf from the
438 * lpfc_sg_dma_buf_pool PCI pool
439 * @phba: HBA which owns the pool to allocate from
440 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation
441 * @handle: used to return the DMA-mapped address of the nvmet_buf
442 *
443 * Description: Allocates a DMA-mapped buffer from the lpfc_sg_dma_buf_pool
444 * PCI pool.  Allocates from generic dma_pool_alloc function.
445 *
446 * Returns:
447 *   pointer to the allocated nvmet_buf on success
448 *   NULL on failure
449 **/
450void *
451lpfc_nvmet_buf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
452{
453	void *ret;
454
455	ret = dma_pool_alloc(phba->lpfc_sg_dma_buf_pool, GFP_KERNEL, handle);
456	return ret;
457}
458
459/**
460 * lpfc_nvmet_buf_free - Free an nvmet_buf from the lpfc_sg_dma_buf_pool
461 * PCI pool
462 * @phba: HBA which owns the pool to return to
463 * @virt: nvmet_buf to free
464 * @dma: the DMA-mapped address of the lpfc_sg_dma_buf_pool to be freed
465 *
466 * Returns: None
467 **/
468void
469lpfc_nvmet_buf_free(struct lpfc_hba *phba, void *virt, dma_addr_t dma)
470{
471	dma_pool_free(phba->lpfc_sg_dma_buf_pool, virt, dma);
472}
473
474/**
475 * lpfc_els_hbq_alloc - Allocate an HBQ buffer
476 * @phba: HBA to allocate HBQ buffer for
477 *
478 * Description: Allocates a DMA-mapped HBQ buffer from the lpfc_hrb_pool PCI
479 * pool along a non-DMA-mapped container for it.
480 *
481 * Notes: Not interrupt-safe.  Must be called with no locks held.
482 *
483 * Returns:
484 *   pointer to HBQ on success
485 *   NULL on failure
486 **/
487struct hbq_dmabuf *
488lpfc_els_hbq_alloc(struct lpfc_hba *phba)
489{
490	struct hbq_dmabuf *hbqbp;
491
492	hbqbp = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
493	if (!hbqbp)
494		return NULL;
495
496	hbqbp->dbuf.virt = dma_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL,
497					  &hbqbp->dbuf.phys);
498	if (!hbqbp->dbuf.virt) {
499		kfree(hbqbp);
500		return NULL;
501	}
502	hbqbp->total_size = LPFC_BPL_SIZE;
503	return hbqbp;
504}
505
506/**
507 * lpfc_els_hbq_free - Frees an HBQ buffer allocated with lpfc_els_hbq_alloc
508 * @phba: HBA buffer was allocated for
509 * @hbqbp: HBQ container returned by lpfc_els_hbq_alloc
510 *
511 * Description: Frees both the container and the DMA-mapped buffer returned by
512 * lpfc_els_hbq_alloc.
513 *
514 * Notes: Can be called with or without locks held.
515 *
516 * Returns: None
517 **/
518void
519lpfc_els_hbq_free(struct lpfc_hba *phba, struct hbq_dmabuf *hbqbp)
520{
521	dma_pool_free(phba->lpfc_hbq_pool, hbqbp->dbuf.virt, hbqbp->dbuf.phys);
522	kfree(hbqbp);
523	return;
524}
525
526/**
527 * lpfc_sli4_rb_alloc - Allocate an SLI4 Receive buffer
528 * @phba: HBA to allocate a receive buffer for
529 *
530 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI
531 * pool along a non-DMA-mapped container for it.
532 *
533 * Notes: Not interrupt-safe.  Must be called with no locks held.
534 *
535 * Returns:
536 *   pointer to HBQ on success
537 *   NULL on failure
538 **/
539struct hbq_dmabuf *
540lpfc_sli4_rb_alloc(struct lpfc_hba *phba)
541{
542	struct hbq_dmabuf *dma_buf;
543
544	dma_buf = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
545	if (!dma_buf)
546		return NULL;
547
548	dma_buf->hbuf.virt = dma_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL,
549					    &dma_buf->hbuf.phys);
550	if (!dma_buf->hbuf.virt) {
551		kfree(dma_buf);
552		return NULL;
553	}
554	dma_buf->dbuf.virt = dma_pool_alloc(phba->lpfc_drb_pool, GFP_KERNEL,
555					    &dma_buf->dbuf.phys);
556	if (!dma_buf->dbuf.virt) {
557		dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
558			      dma_buf->hbuf.phys);
559		kfree(dma_buf);
560		return NULL;
561	}
562	dma_buf->total_size = LPFC_DATA_BUF_SIZE;
563	return dma_buf;
564}
565
566/**
567 * lpfc_sli4_rb_free - Frees a receive buffer
568 * @phba: HBA buffer was allocated for
569 * @dmab: DMA Buffer container returned by lpfc_sli4_hbq_alloc
570 *
571 * Description: Frees both the container and the DMA-mapped buffers returned by
572 * lpfc_sli4_rb_alloc.
573 *
574 * Notes: Can be called with or without locks held.
575 *
576 * Returns: None
577 **/
578void
579lpfc_sli4_rb_free(struct lpfc_hba *phba, struct hbq_dmabuf *dmab)
580{
581	dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys);
582	dma_pool_free(phba->lpfc_drb_pool, dmab->dbuf.virt, dmab->dbuf.phys);
583	kfree(dmab);
584}
585
586/**
587 * lpfc_sli4_nvmet_alloc - Allocate an SLI4 Receive buffer
588 * @phba: HBA to allocate a receive buffer for
589 *
590 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI
591 * pool along a non-DMA-mapped container for it.
592 *
593 * Notes: Not interrupt-safe.  Must be called with no locks held.
594 *
595 * Returns:
596 *   pointer to HBQ on success
597 *   NULL on failure
598 **/
599struct rqb_dmabuf *
600lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba)
601{
602	struct rqb_dmabuf *dma_buf;
603
604	dma_buf = kzalloc(sizeof(struct rqb_dmabuf), GFP_KERNEL);
605	if (!dma_buf)
606		return NULL;
607
608	dma_buf->hbuf.virt = dma_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL,
609					    &dma_buf->hbuf.phys);
610	if (!dma_buf->hbuf.virt) {
611		kfree(dma_buf);
612		return NULL;
613	}
614	dma_buf->dbuf.virt = dma_pool_alloc(phba->lpfc_nvmet_drb_pool,
615					    GFP_KERNEL, &dma_buf->dbuf.phys);
616	if (!dma_buf->dbuf.virt) {
617		dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
618			      dma_buf->hbuf.phys);
619		kfree(dma_buf);
620		return NULL;
621	}
622	dma_buf->total_size = LPFC_NVMET_DATA_BUF_SIZE;
623	return dma_buf;
624}
625
626/**
627 * lpfc_sli4_nvmet_free - Frees a receive buffer
628 * @phba: HBA buffer was allocated for
629 * @dmab: DMA Buffer container returned by lpfc_sli4_rbq_alloc
630 *
631 * Description: Frees both the container and the DMA-mapped buffers returned by
632 * lpfc_sli4_nvmet_alloc.
633 *
634 * Notes: Can be called with or without locks held.
635 *
636 * Returns: None
637 **/
638void
639lpfc_sli4_nvmet_free(struct lpfc_hba *phba, struct rqb_dmabuf *dmab)
640{
641	dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys);
642	dma_pool_free(phba->lpfc_nvmet_drb_pool,
643		      dmab->dbuf.virt, dmab->dbuf.phys);
644	kfree(dmab);
645}
646
647/**
648 * lpfc_in_buf_free - Free a DMA buffer
649 * @phba: HBA buffer is associated with
650 * @mp: Buffer to free
651 *
652 * Description: Frees the given DMA buffer in the appropriate way given if the
653 * HBA is running in SLI3 mode with HBQs enabled.
654 *
655 * Notes: Takes phba->hbalock.  Can be called with or without other locks held.
656 *
657 * Returns: None
658 **/
659void
660lpfc_in_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
661{
662	struct hbq_dmabuf *hbq_entry;
663	unsigned long flags;
664
665	if (!mp)
666		return;
667
668	if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
669		hbq_entry = container_of(mp, struct hbq_dmabuf, dbuf);
670		/* Check whether HBQ is still in use */
671		spin_lock_irqsave(&phba->hbalock, flags);
672		if (!phba->hbq_in_use) {
673			spin_unlock_irqrestore(&phba->hbalock, flags);
674			return;
675		}
676		list_del(&hbq_entry->dbuf.list);
677		if (hbq_entry->tag == -1) {
678			(phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer)
679				(phba, hbq_entry);
680		} else {
681			lpfc_sli_free_hbq(phba, hbq_entry);
682		}
683		spin_unlock_irqrestore(&phba->hbalock, flags);
684	} else {
685		lpfc_mbuf_free(phba, mp->virt, mp->phys);
686		kfree(mp);
687	}
688	return;
689}
690
691/**
692 * lpfc_rq_buf_free - Free a RQ DMA buffer
693 * @phba: HBA buffer is associated with
694 * @mp: Buffer to free
695 *
696 * Description: Frees the given DMA buffer in the appropriate way given by
697 * reposting it to its associated RQ so it can be reused.
698 *
699 * Notes: Takes phba->hbalock.  Can be called with or without other locks held.
700 *
701 * Returns: None
702 **/
703void
704lpfc_rq_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
705{
706	struct lpfc_rqb *rqbp;
707	struct lpfc_rqe hrqe;
708	struct lpfc_rqe drqe;
709	struct rqb_dmabuf *rqb_entry;
710	unsigned long flags;
711	int rc;
712
713	if (!mp)
714		return;
715
716	rqb_entry = container_of(mp, struct rqb_dmabuf, hbuf);
717	rqbp = rqb_entry->hrq->rqbp;
718
719	spin_lock_irqsave(&phba->hbalock, flags);
720	list_del(&rqb_entry->hbuf.list);
721	hrqe.address_lo = putPaddrLow(rqb_entry->hbuf.phys);
722	hrqe.address_hi = putPaddrHigh(rqb_entry->hbuf.phys);
723	drqe.address_lo = putPaddrLow(rqb_entry->dbuf.phys);
724	drqe.address_hi = putPaddrHigh(rqb_entry->dbuf.phys);
725	rc = lpfc_sli4_rq_put(rqb_entry->hrq, rqb_entry->drq, &hrqe, &drqe);
726	if (rc < 0) {
727		(rqbp->rqb_free_buffer)(phba, rqb_entry);
728		lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
729				"6409 Cannot post to HRQ %d: %x %x %x "
730				"DRQ %x %x\n",
731				rqb_entry->hrq->queue_id,
732				rqb_entry->hrq->host_index,
733				rqb_entry->hrq->hba_index,
734				rqb_entry->hrq->entry_count,
735				rqb_entry->drq->host_index,
736				rqb_entry->drq->hba_index);
737	} else {
738		list_add_tail(&rqb_entry->hbuf.list, &rqbp->rqb_buffer_list);
739		rqbp->buffer_count++;
740	}
741
742	spin_unlock_irqrestore(&phba->hbalock, flags);
743}