drivers/scsi/lpfc/lpfc_mem.c

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2004-2005 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 int
  42 lpfc_mem_alloc(struct lpfc_hba * phba)
  43 {
  44         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
  45         int i;
  46
  47         phba->lpfc_scsi_dma_buf_pool = pci_pool_create("lpfc_scsi_dma_buf_pool",
  48                                 phba->pcidev, phba->cfg_sg_dma_buf_size, 8, 0);
  49         if (!phba->lpfc_scsi_dma_buf_pool)
  50                 goto fail;
  51
  52         phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev,
  53                                                         LPFC_BPL_SIZE, 8,0);
  54         if (!phba->lpfc_mbuf_pool)
  55                 goto fail_free_dma_buf_pool;
  56
  57         pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) *
  58                                          LPFC_MBUF_POOL_SIZE, GFP_KERNEL);
  59         pool->max_count = 0;
  60         pool->current_count = 0;
  61         for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
  62                 pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool,
  63                                        GFP_KERNEL, &pool->elements[i].phys);
  64                 if (!pool->elements[i].virt)
  65                         goto fail_free_mbuf_pool;
  66                 pool->max_count++;
  67                 pool->current_count++;
  68         }
  69
  70         phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
  71                                                          sizeof(LPFC_MBOXQ_t));
  72         if (!phba->mbox_mem_pool)
  73                 goto fail_free_mbuf_pool;
  74
  75         phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
  76                                                 sizeof(struct lpfc_nodelist));
  77         if (!phba->nlp_mem_pool)
  78                 goto fail_free_mbox_pool;
  79
  80         return 0;
  81
  82  fail_free_mbox_pool:
  83         mempool_destroy(phba->mbox_mem_pool);
  84  fail_free_mbuf_pool:
  85         while (--i)
  86                 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
  87                                                  pool->elements[i].phys);
  88         kfree(pool->elements);
  89         pci_pool_destroy(phba->lpfc_mbuf_pool);
  90  fail_free_dma_buf_pool:
  91         pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
  92  fail:
  93         return -ENOMEM;
  94 }
  95
  96 void
  97 lpfc_mem_free(struct lpfc_hba * phba)
  98 {
  99         struct lpfc_sli *psli = &phba->sli;
 100         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 101         LPFC_MBOXQ_t *mbox, *next_mbox;
 102         struct lpfc_dmabuf   *mp;
 103         int i;
 104
 105         list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
 106                 mp = (struct lpfc_dmabuf *) (mbox->context1);
 107                 if (mp) {
 108                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 109                         kfree(mp);
 110                 }
 111                 list_del(&mbox->list);
 112                 mempool_free(mbox, phba->mbox_mem_pool);
 113         }
 114
 115         psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
 116         if (psli->mbox_active) {
 117                 mbox = psli->mbox_active;
 118                 mp = (struct lpfc_dmabuf *) (mbox->context1);
 119                 if (mp) {
 120                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 121                         kfree(mp);
 122                 }
 123                 mempool_free(mbox, phba->mbox_mem_pool);
 124                 psli->mbox_active = NULL;
 125         }
 126
 127         for (i = 0; i < pool->current_count; i++)
 128                 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
 129                                                  pool->elements[i].phys);
 130         kfree(pool->elements);
 131         mempool_destroy(phba->nlp_mem_pool);
 132         mempool_destroy(phba->mbox_mem_pool);
 133
 134         pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
 135         pci_pool_destroy(phba->lpfc_mbuf_pool);
 136
 137         /* Free the iocb lookup array */
 138         kfree(psli->iocbq_lookup);
 139         psli->iocbq_lookup = NULL;
 140
 141 }
 142
 143 void *
 144 lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
 145 {
 146         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 147         void *ret;
 148
 149         ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);
 150
 151         if (!ret && ( mem_flags & MEM_PRI) && pool->current_count) {
 152                 pool->current_count--;
 153                 ret = pool->elements[pool->current_count].virt;
 154                 *handle = pool->elements[pool->current_count].phys;
 155         }
 156         return ret;
 157 }
 158
 159 void
 160 lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
 161 {
 162         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 163
 164         if (pool->current_count < pool->max_count) {
 165                 pool->elements[pool->current_count].virt = virt;
 166                 pool->elements[pool->current_count].phys = dma;
 167                 pool->current_count++;
 168         } else {
 169                 pci_pool_free(phba->lpfc_mbuf_pool, virt, dma);
 170         }
 171         return;
 172 }