Adding upstream version 5.10.209.upstream/5.10.209

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 740 insertions, 0 deletions

diff --git a/drivers/scsi/lpfc/lpfc_mem.c b/drivers/scsi/lpfc/lpfc_mem.c
new file mode 100644
index 000000000..be54fbf51
--- /dev/null
+++ b/drivers/scsi/lpfc/lpfc_mem.c
@@ -0,0 +1,740 @@
+/*******************************************************************
+ * 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);
+}