diff options
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_mem.c')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_mem.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc_mem.c b/drivers/scsi/lpfc/lpfc_mem.c new file mode 100644 index 000000000000..4397e1160712 --- /dev/null +++ b/drivers/scsi/lpfc/lpfc_mem.c @@ -0,0 +1,179 @@ +/******************************************************************* + * This file is part of the Emulex Linux Device Driver for * + * Enterprise Fibre Channel Host Bus Adapters. * + * Refer to the README file included with this package for * + * driver version and adapter support. * + * Copyright (C) 2004 Emulex Corporation. * + * www.emulex.com * + * * + * This program is free software; you can redistribute it and/or * + * modify it under the terms of the GNU General Public License * + * as published by the Free Software Foundation; either version 2 * + * of the License, or (at your option) any later version. * + * * + * This program is distributed in the hope that it will be useful, * + * but WITHOUT ANY WARRANTY; without even the implied warranty of * + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * + * GNU General Public License for more details, a copy of which * + * can be found in the file COPYING included with this package. * + *******************************************************************/ + +/* + * $Id: lpfc_mem.c 1.79 2005/04/13 14:25:50EDT sf_support Exp $ + */ + +#include <linux/mempool.h> +#include <linux/pci.h> +#include <linux/interrupt.h> + +#include "lpfc_hw.h" +#include "lpfc_sli.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 */ + +static void * +lpfc_pool_kmalloc(unsigned int gfp_flags, void *data) +{ + return kmalloc((unsigned long)data, gfp_flags); +} + +static void +lpfc_pool_kfree(void *obj, void *data) +{ + kfree(obj); +} + +int +lpfc_mem_alloc(struct lpfc_hba * phba) +{ + struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; + int i; + + phba->lpfc_scsi_dma_buf_pool = pci_pool_create("lpfc_scsi_dma_buf_pool", + phba->pcidev, phba->cfg_sg_dma_buf_size, 8, 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, 8,0); + if (!phba->lpfc_mbuf_pool) + goto fail_free_dma_buf_pool; + + pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) * + LPFC_MBUF_POOL_SIZE, GFP_KERNEL); + 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(LPFC_MEM_POOL_SIZE, + lpfc_pool_kmalloc, lpfc_pool_kfree, + (void *)(unsigned long)sizeof(LPFC_MBOXQ_t)); + if (!phba->mbox_mem_pool) + goto fail_free_mbuf_pool; + + phba->nlp_mem_pool = mempool_create(LPFC_MEM_POOL_SIZE, + lpfc_pool_kmalloc, lpfc_pool_kfree, + (void *)(unsigned long)sizeof(struct lpfc_nodelist)); + if (!phba->nlp_mem_pool) + goto fail_free_mbox_pool; + + return 0; + + fail_free_mbox_pool: + mempool_destroy(phba->mbox_mem_pool); + fail_free_mbuf_pool: + while (--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); + fail_free_dma_buf_pool: + pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool); + fail: + return -ENOMEM; +} + +void +lpfc_mem_free(struct lpfc_hba * phba) +{ + struct lpfc_sli *psli = &phba->sli; + struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; + LPFC_MBOXQ_t *mbox, *next_mbox; + struct lpfc_dmabuf *mp; + int i; + + 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); + } + + psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE; + 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; + } + + 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); + mempool_destroy(phba->nlp_mem_pool); + mempool_destroy(phba->mbox_mem_pool); + + pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool); + pci_pool_destroy(phba->lpfc_mbuf_pool); +} + +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; + void *ret; + + ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle); + + 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; + } + return ret; +} + +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; +} |