lpfc_mem.c revision 2e0fef85e098f6794956b8b80b111179fbb4cbb7
1/******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Fibre Channel Host Bus Adapters. * 4 * Copyright (C) 2004-2006 Emulex. All rights reserved. * 5 * EMULEX and SLI are trademarks of Emulex. * 6 * www.emulex.com * 7 * Portions Copyright (C) 2004-2005 Christoph Hellwig * 8 * * 9 * This program is free software; you can redistribute it and/or * 10 * modify it under the terms of version 2 of the GNU General * 11 * Public License as published by the Free Software Foundation. * 12 * This program is distributed in the hope that it will be useful. * 13 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * 14 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * 15 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE * 16 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD * 17 * TO BE LEGALLY INVALID. See the GNU General Public License for * 18 * more details, a copy of which can be found in the file COPYING * 19 * included with this package. * 20 *******************************************************************/ 21 22#include <linux/mempool.h> 23#include <linux/pci.h> 24#include <linux/interrupt.h> 25 26#include <scsi/scsi_device.h> 27#include <scsi/scsi_transport_fc.h> 28 29#include <scsi/scsi.h> 30 31#include "lpfc_hw.h" 32#include "lpfc_sli.h" 33#include "lpfc_disc.h" 34#include "lpfc_scsi.h" 35#include "lpfc.h" 36#include "lpfc_crtn.h" 37 38#define LPFC_MBUF_POOL_SIZE 64 /* max elements in MBUF safety pool */ 39#define LPFC_MEM_POOL_SIZE 64 /* max elem in non-DMA safety pool */ 40 41 42 43int 44lpfc_mem_alloc(struct lpfc_hba * phba) 45{ 46 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; 47 int i; 48 49 phba->lpfc_scsi_dma_buf_pool = pci_pool_create("lpfc_scsi_dma_buf_pool", 50 phba->pcidev, phba->cfg_sg_dma_buf_size, 8, 0); 51 if (!phba->lpfc_scsi_dma_buf_pool) 52 goto fail; 53 54 phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev, 55 LPFC_BPL_SIZE, 8,0); 56 if (!phba->lpfc_mbuf_pool) 57 goto fail_free_dma_buf_pool; 58 59 pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) * 60 LPFC_MBUF_POOL_SIZE, GFP_KERNEL); 61 if (!pool->elements) 62 goto fail_free_lpfc_mbuf_pool; 63 64 pool->max_count = 0; 65 pool->current_count = 0; 66 for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) { 67 pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool, 68 GFP_KERNEL, &pool->elements[i].phys); 69 if (!pool->elements[i].virt) 70 goto fail_free_mbuf_pool; 71 pool->max_count++; 72 pool->current_count++; 73 } 74 75 phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE, 76 sizeof(LPFC_MBOXQ_t)); 77 if (!phba->mbox_mem_pool) 78 goto fail_free_mbuf_pool; 79 80 phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE, 81 sizeof(struct lpfc_nodelist)); 82 if (!phba->nlp_mem_pool) 83 goto fail_free_mbox_pool; 84 85 return 0; 86 87 fail_free_mbox_pool: 88 mempool_destroy(phba->mbox_mem_pool); 89 phba->mbox_mem_pool = NULL; 90 fail_free_mbuf_pool: 91 while (i--) 92 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt, 93 pool->elements[i].phys); 94 kfree(pool->elements); 95 fail_free_lpfc_mbuf_pool: 96 pci_pool_destroy(phba->lpfc_mbuf_pool); 97 phba->lpfc_mbuf_pool = NULL; 98 fail_free_dma_buf_pool: 99 pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool); 100 phba->lpfc_scsi_dma_buf_pool = NULL; 101 fail: 102 return -ENOMEM; 103} 104 105void 106lpfc_mem_free(struct lpfc_hba * phba) 107{ 108 struct lpfc_sli *psli = &phba->sli; 109 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; 110 LPFC_MBOXQ_t *mbox, *next_mbox; 111 struct lpfc_dmabuf *mp; 112 int i; 113 114 spin_lock_irq(&phba->hbalock); 115 list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) { 116 mp = (struct lpfc_dmabuf *) (mbox->context1); 117 if (mp) { 118 lpfc_mbuf_free(phba, mp->virt, mp->phys); 119 kfree(mp); 120 } 121 list_del(&mbox->list); 122 mempool_free(mbox, phba->mbox_mem_pool); 123 } 124 125 psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE; 126 spin_unlock_irq(&phba->hbalock); 127 if (psli->mbox_active) { 128 mbox = psli->mbox_active; 129 mp = (struct lpfc_dmabuf *) (mbox->context1); 130 if (mp) { 131 lpfc_mbuf_free(phba, mp->virt, mp->phys); 132 kfree(mp); 133 } 134 mempool_free(mbox, phba->mbox_mem_pool); 135 psli->mbox_active = NULL; 136 } 137 138 for (i = 0; i < pool->current_count; i++) 139 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt, 140 pool->elements[i].phys); 141 kfree(pool->elements); 142 143 mempool_destroy(phba->nlp_mem_pool); 144 mempool_destroy(phba->mbox_mem_pool); 145 146 pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool); 147 pci_pool_destroy(phba->lpfc_mbuf_pool); 148 149 phba->nlp_mem_pool = NULL; 150 phba->mbox_mem_pool = NULL; 151 phba->lpfc_scsi_dma_buf_pool = NULL; 152 phba->lpfc_mbuf_pool = NULL; 153 154 /* Free the iocb lookup array */ 155 kfree(psli->iocbq_lookup); 156 psli->iocbq_lookup = NULL; 157 158} 159 160void * 161lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle) 162{ 163 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; 164 unsigned long iflags; 165 void *ret; 166 167 ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle); 168 169 spin_lock_irqsave(&phba->hbalock, iflags); 170 if (!ret && ( mem_flags & MEM_PRI) && pool->current_count) { 171 pool->current_count--; 172 ret = pool->elements[pool->current_count].virt; 173 *handle = pool->elements[pool->current_count].phys; 174 } 175 spin_unlock_irqrestore(&phba->hbalock, iflags); 176 return ret; 177} 178 179void 180__lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma) 181{ 182 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; 183 184 if (pool->current_count < pool->max_count) { 185 pool->elements[pool->current_count].virt = virt; 186 pool->elements[pool->current_count].phys = dma; 187 pool->current_count++; 188 } else { 189 pci_pool_free(phba->lpfc_mbuf_pool, virt, dma); 190 } 191 return; 192} 193 194void 195lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma) 196{ 197 unsigned long iflags; 198 199 spin_lock_irqsave(&phba->hbalock, iflags); 200 __lpfc_mbuf_free(phba, virt, dma); 201 spin_unlock_irqrestore(&phba->hbalock, iflags); 202 return; 203} 204