drivers/scsi/lpfc/lpfc_mem.c - linux - Git at Google

 /*******************************************************************
  * This file is part of the Emulex Linux Device Driver for         *
  * Fibre Channel Host Bus Adapters.                                *
  * Copyright (C) 2017-2018 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 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);
 }
	/*******************************************************************
	* This file is part of the Emulex Linux Device Driver for *
	* Fibre Channel Host Bus Adapters. *
	* Copyright (C) 2017-2018 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 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);
	}