- 根目录:
- drivers
- scsi
- lpfc
- lpfc_mem.c
/*******************************************************************
* This file is part of the Emulex Linux Device Driver for *
* Fibre Channel Host Bus Adapters. *
* Copyright (C) 2004-2009 Emulex. All rights reserved. *
* EMULEX and SLI are trademarks of Emulex. *
* www.emulex.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_device.h>
#include <scsi/scsi_transport_fc.h>
#include <scsi/scsi.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_scsi.h"
#include "lpfc.h"
#include "lpfc_crtn.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 */
/**
* lpfc_mem_alloc - create and allocate all PCI and memory pools
* @phba: HBA to allocate pools for
*
* Description: Creates and allocates PCI pools lpfc_scsi_dma_buf_pool,
* 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;
if (phba->sli_rev == LPFC_SLI_REV4)
phba->lpfc_scsi_dma_buf_pool =
pci_pool_create("lpfc_scsi_dma_buf_pool",
phba->pcidev,
phba->cfg_sg_dma_buf_size,
phba->cfg_sg_dma_buf_size,
0);
else
phba->lpfc_scsi_dma_buf_pool =
pci_pool_create("lpfc_scsi_dma_buf_pool",
phba->pcidev, phba->cfg_sg_dma_buf_size,
align, 0);
if (!phba->lpfc_scsi_dma_buf_pool)
goto fail;
phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev,
LPFC_BPL_SIZE,
align, 0);
if (!phba->lpfc_mbuf_pool)
goto fail_free_dma_buf_pool;
pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) *
LPFC_MBUF_POOL_SIZE, 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 = pci_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_MEM_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_MEM_POOL_SIZE,
sizeof(struct lpfc_node_rrq));
if (!phba->rrq_pool)
goto fail_free_nlp_mem_pool;
phba->lpfc_hrb_pool = pci_pool_create("lpfc_hrb_pool",
phba->pcidev,
LPFC_HDR_BUF_SIZE, align, 0);
if (!phba->lpfc_hrb_pool)
goto fail_free_rrq_mem_pool;
phba->lpfc_drb_pool = pci_pool_create("lpfc_drb_pool",
phba->pcidev,
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 = pci_pool_create("lpfc_hbq_pool",
phba->pcidev, 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;
}
return 0;
fail_free_hrb_pool:
pci_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--)
pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
pool->elements[i].phys);
kfree(pool->elements);
fail_free_lpfc_mbuf_pool:
pci_pool_destroy(phba->lpfc_mbuf_pool);
phba->lpfc_mbuf_pool = NULL;
fail_free_dma_buf_pool:
pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
phba->lpfc_scsi_dma_buf_pool = NULL;
fail:
return -ENOMEM;
}
/**
* 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;
/* Free HBQ pools */
lpfc_sli_hbqbuf_free_all(phba);
if (phba->lpfc_drb_pool)
pci_pool_destroy(phba->lpfc_drb_pool);
phba->lpfc_drb_pool = NULL;
if (phba->lpfc_hrb_pool)
pci_pool_destroy(phba->lpfc_hrb_pool);
phba->lpfc_hrb_pool = NULL;
if (phba->lpfc_hbq_pool)
pci_pool_destroy(phba->lpfc_hbq_pool);
phba->lpfc_hbq_pool = NULL;
/* Free NLP memory pool */
mempool_destroy(phba->nlp_mem_pool);
phba->nlp_mem_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++)
pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
pool->elements[i].phys);
kfree(pool->elements);
pci_pool_destroy(phba->lpfc_mbuf_pool);
phba->lpfc_mbuf_pool = NULL;
/* Free DMA buffer memory pool */
pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
phba->lpfc_scsi_dma_buf_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_scsi_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->context1);
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->context1);
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->context1);
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 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 pci_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 = pci_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 {
pci_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_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 = kmalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
if (!hbqbp)
return NULL;
hbqbp->dbuf.virt = pci_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL,
&hbqbp->dbuf.phys);
if (!hbqbp->dbuf.virt) {
kfree(hbqbp);
return NULL;
}
hbqbp->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)
{
pci_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 = kmalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
if (!dma_buf)
return NULL;
dma_buf->hbuf.virt = pci_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 = pci_pool_alloc(phba->lpfc_drb_pool, GFP_KERNEL,
&dma_buf->dbuf.phys);
if (!dma_buf->dbuf.virt) {
pci_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
dma_buf->hbuf.phys);
kfree(dma_buf);
return NULL;
}
dma_buf->size = LPFC_BPL_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)
{
pci_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys);
pci_pool_free(phba->lpfc_drb_pool, dmab->dbuf.virt, dmab->dbuf.phys);
kfree(dmab);
return;
}
/**
* 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) {
/* 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;
}
hbq_entry = container_of(mp, struct hbq_dmabuf, dbuf);
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;
}