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 static void *
  42 lpfc_pool_kmalloc(gfp_t gfp_flags, void *data)
  43 {
  44         return kmalloc((unsigned long)data, gfp_flags);
  45 }
  46
  47 static void
  48 lpfc_pool_kfree(void *obj, void *data)
  49 {
  50         kfree(obj);
  51 }
  52
  53 int
  54 lpfc_mem_alloc(struct lpfc_hba * phba)
  55 {
  56         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
  57         int i;
  58
  59         phba->lpfc_scsi_dma_buf_pool = pci_pool_create("lpfc_scsi_dma_buf_pool",
  60                                 phba->pcidev, phba->cfg_sg_dma_buf_size, 8, 0);
  61         if (!phba->lpfc_scsi_dma_buf_pool)
  62                 goto fail;
  63
  64         phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev,
  65                                                         LPFC_BPL_SIZE, 8,0);
  66         if (!phba->lpfc_mbuf_pool)
  67                 goto fail_free_dma_buf_pool;
  68
  69         pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) *
  70                                          LPFC_MBUF_POOL_SIZE, GFP_KERNEL);
  71         pool->max_count = 0;
  72         pool->current_count = 0;
  73         for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
  74                 pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool,
  75                                        GFP_KERNEL, &pool->elements[i].phys);
  76                 if (!pool->elements[i].virt)
  77                         goto fail_free_mbuf_pool;
  78                 pool->max_count++;
  79                 pool->current_count++;
  80         }
  81
  82         phba->mbox_mem_pool = mempool_create(LPFC_MEM_POOL_SIZE,
  83                                 lpfc_pool_kmalloc, lpfc_pool_kfree,
  84                                 (void *)(unsigned long)sizeof(LPFC_MBOXQ_t));
  85         if (!phba->mbox_mem_pool)
  86                 goto fail_free_mbuf_pool;
  87
  88         phba->nlp_mem_pool = mempool_create(LPFC_MEM_POOL_SIZE,
  89                         lpfc_pool_kmalloc, lpfc_pool_kfree,
  90                         (void *)(unsigned long)sizeof(struct lpfc_nodelist));
  91         if (!phba->nlp_mem_pool)
  92                 goto fail_free_mbox_pool;
  93
  94         return 0;
  95
  96  fail_free_mbox_pool:
  97         mempool_destroy(phba->mbox_mem_pool);
  98  fail_free_mbuf_pool:
  99         while (--i)
 100                 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
 101                                                  pool->elements[i].phys);
 102         kfree(pool->elements);
 103         pci_pool_destroy(phba->lpfc_mbuf_pool);
 104  fail_free_dma_buf_pool:
 105         pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
 106  fail:
 107         return -ENOMEM;
 108 }
 109
 110 void
 111 lpfc_mem_free(struct lpfc_hba * phba)
 112 {
 113         struct lpfc_sli *psli = &phba->sli;
 114         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 115         LPFC_MBOXQ_t *mbox, *next_mbox;
 116         struct lpfc_dmabuf   *mp;
 117         int i;
 118
 119         list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
 120                 mp = (struct lpfc_dmabuf *) (mbox->context1);
 121                 if (mp) {
 122                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 123                         kfree(mp);
 124                 }
 125                 list_del(&mbox->list);
 126                 mempool_free(mbox, phba->mbox_mem_pool);
 127         }
 128
 129         psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
 130         if (psli->mbox_active) {
 131                 mbox = psli->mbox_active;
 132                 mp = (struct lpfc_dmabuf *) (mbox->context1);
 133                 if (mp) {
 134                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 135                         kfree(mp);
 136                 }
 137                 mempool_free(mbox, phba->mbox_mem_pool);
 138                 psli->mbox_active = NULL;
 139         }
 140
 141         for (i = 0; i < pool->current_count; i++)
 142                 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
 143                                                  pool->elements[i].phys);
 144         kfree(pool->elements);
 145         mempool_destroy(phba->nlp_mem_pool);
 146         mempool_destroy(phba->mbox_mem_pool);
 147
 148         pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
 149         pci_pool_destroy(phba->lpfc_mbuf_pool);
 150 }
 151
 152 void *
 153 lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
 154 {
 155         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 156         void *ret;
 157
 158         ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);
 159
 160         if (!ret && ( mem_flags & MEM_PRI) && pool->current_count) {
 161                 pool->current_count--;
 162                 ret = pool->elements[pool->current_count].virt;
 163                 *handle = pool->elements[pool->current_count].phys;
 164         }
 165         return ret;
 166 }
 167
 168 void
 169 lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
 170 {
 171         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 172
 173         if (pool->current_count < pool->max_count) {
 174                 pool->elements[pool->current_count].virt = virt;
 175                 pool->elements[pool->current_count].phys = dma;
 176                 pool->current_count++;
 177         } else {
 178                 pci_pool_free(phba->lpfc_mbuf_pool, virt, dma);
 179         }
 180         return;
 181 }