drivers/scsi/lpfc/lpfc_mem.c

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Enterprise Fibre Channel Host Bus Adapters.                     *
   4  * Refer to the README file included with this package for         *
   5  * driver version and adapter support.                             *
   6  * Copyright (C) 2004 Emulex Corporation.                          *
   7  * www.emulex.com                                                  *
   8  *                                                                 *
   9  * This program is free software; you can redistribute it and/or   *
  10  * modify it under the terms of the GNU General Public License     *
  11  * as published by the Free Software Foundation; either version 2  *
  12  * of the License, or (at your option) any later version.          *
  13  *                                                                 *
  14  * This program is distributed in the hope that it will be useful, *
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of  *
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the   *
  17  * GNU General Public License for more details, a copy of which    *
  18  * can be found in the file COPYING included with this package.    *
  19  *******************************************************************/
  20
  21 /*
  22  * $Id: lpfc_mem.c 1.79 2005/04/13 14:25:50EDT sf_support Exp  $
  23  */
  24
  25 #include <linux/mempool.h>
  26 #include <linux/pci.h>
  27 #include <linux/interrupt.h>
  28
  29 #include "lpfc_hw.h"
  30 #include "lpfc_sli.h"
  31 #include "lpfc_disc.h"
  32 #include "lpfc_scsi.h"
  33 #include "lpfc.h"
  34 #include "lpfc_crtn.h"
  35
  36 #define LPFC_MBUF_POOL_SIZE     64      /* max elements in MBUF safety pool */
  37 #define LPFC_MEM_POOL_SIZE      64      /* max elem in non-DMA safety pool */
  38
  39 static void *
  40 lpfc_pool_kmalloc(unsigned int gfp_flags, void *data)
  41 {
  42         return kmalloc((unsigned long)data, gfp_flags);
  43 }
  44
  45 static void
  46 lpfc_pool_kfree(void *obj, void *data)
  47 {
  48         kfree(obj);
  49 }
  50
  51 int
  52 lpfc_mem_alloc(struct lpfc_hba * phba)
  53 {
  54         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
  55         int i;
  56
  57         phba->lpfc_scsi_dma_buf_pool = pci_pool_create("lpfc_scsi_dma_buf_pool",
  58                                 phba->pcidev, phba->cfg_sg_dma_buf_size, 8, 0);
  59         if (!phba->lpfc_scsi_dma_buf_pool)
  60                 goto fail;
  61
  62         phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev,
  63                                                         LPFC_BPL_SIZE, 8,0);
  64         if (!phba->lpfc_mbuf_pool)
  65                 goto fail_free_dma_buf_pool;
  66
  67         pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) *
  68                                          LPFC_MBUF_POOL_SIZE, GFP_KERNEL);
  69         pool->max_count = 0;
  70         pool->current_count = 0;
  71         for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
  72                 pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool,
  73                                        GFP_KERNEL, &pool->elements[i].phys);
  74                 if (!pool->elements[i].virt)
  75                         goto fail_free_mbuf_pool;
  76                 pool->max_count++;
  77                 pool->current_count++;
  78         }
  79
  80         phba->mbox_mem_pool = mempool_create(LPFC_MEM_POOL_SIZE,
  81                                 lpfc_pool_kmalloc, lpfc_pool_kfree,
  82                                 (void *)(unsigned long)sizeof(LPFC_MBOXQ_t));
  83         if (!phba->mbox_mem_pool)
  84                 goto fail_free_mbuf_pool;
  85
  86         phba->nlp_mem_pool = mempool_create(LPFC_MEM_POOL_SIZE,
  87                         lpfc_pool_kmalloc, lpfc_pool_kfree,
  88                         (void *)(unsigned long)sizeof(struct lpfc_nodelist));
  89         if (!phba->nlp_mem_pool)
  90                 goto fail_free_mbox_pool;
  91
  92         return 0;
  93
  94  fail_free_mbox_pool:
  95         mempool_destroy(phba->mbox_mem_pool);
  96  fail_free_mbuf_pool:
  97         while (--i)
  98                 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
  99                                                  pool->elements[i].phys);
 100         kfree(pool->elements);
 101         pci_pool_destroy(phba->lpfc_mbuf_pool);
 102  fail_free_dma_buf_pool:
 103         pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
 104  fail:
 105         return -ENOMEM;
 106 }
 107
 108 void
 109 lpfc_mem_free(struct lpfc_hba * phba)
 110 {
 111         struct lpfc_sli *psli = &phba->sli;
 112         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 113         LPFC_MBOXQ_t *mbox, *next_mbox;
 114         struct lpfc_dmabuf   *mp;
 115         int i;
 116
 117         list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
 118                 mp = (struct lpfc_dmabuf *) (mbox->context1);
 119                 if (mp) {
 120                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 121                         kfree(mp);
 122                 }
 123                 list_del(&mbox->list);
 124                 mempool_free(mbox, phba->mbox_mem_pool);
 125         }
 126
 127         psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
 128         if (psli->mbox_active) {
 129                 mbox = psli->mbox_active;
 130                 mp = (struct lpfc_dmabuf *) (mbox->context1);
 131                 if (mp) {
 132                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 133                         kfree(mp);
 134                 }
 135                 mempool_free(mbox, phba->mbox_mem_pool);
 136                 psli->mbox_active = NULL;
 137         }
 138
 139         for (i = 0; i < pool->current_count; i++)
 140                 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
 141                                                  pool->elements[i].phys);
 142         kfree(pool->elements);
 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
 150 void *
 151 lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
 152 {
 153         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 154         void *ret;
 155
 156         ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);
 157
 158         if (!ret && ( mem_flags & MEM_PRI) && pool->current_count) {
 159                 pool->current_count--;
 160                 ret = pool->elements[pool->current_count].virt;
 161                 *handle = pool->elements[pool->current_count].phys;
 162         }
 163         return ret;
 164 }
 165
 166 void
 167 lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
 168 {
 169         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 170
 171         if (pool->current_count < pool->max_count) {
 172                 pool->elements[pool->current_count].virt = virt;
 173                 pool->elements[pool->current_count].phys = dma;
 174                 pool->current_count++;
 175         } else {
 176                 pci_pool_free(phba->lpfc_mbuf_pool, virt, dma);
 177         }
 178         return;
 179 }