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 "lpfc_hw.h"
  27 #include "lpfc_sli.h"
  28 #include "lpfc_disc.h"
  29 #include "lpfc_scsi.h"
  30 #include "lpfc.h"
  31 #include "lpfc_crtn.h"
  32
  33 #define LPFC_MBUF_POOL_SIZE     64      /* max elements in MBUF safety pool */
  34 #define LPFC_MEM_POOL_SIZE      64      /* max elem in non-DMA safety pool */
  35
  36 static void *
  37 lpfc_pool_kmalloc(unsigned int gfp_flags, void *data)
  38 {
  39         return kmalloc((unsigned long)data, gfp_flags);
  40 }
  41
  42 static void
  43 lpfc_pool_kfree(void *obj, void *data)
  44 {
  45         kfree(obj);
  46 }
  47
  48 int
  49 lpfc_mem_alloc(struct lpfc_hba * phba)
  50 {
  51         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
  52         int i;
  53
  54         phba->lpfc_scsi_dma_buf_pool = pci_pool_create("lpfc_scsi_dma_buf_pool",
  55                                 phba->pcidev, phba->cfg_sg_dma_buf_size, 8, 0);
  56         if (!phba->lpfc_scsi_dma_buf_pool)
  57                 goto fail;
  58
  59         phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev,
  60                                                         LPFC_BPL_SIZE, 8,0);
  61         if (!phba->lpfc_mbuf_pool)
  62                 goto fail_free_dma_buf_pool;
  63
  64         pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) *
  65                                          LPFC_MBUF_POOL_SIZE, GFP_KERNEL);
  66         pool->max_count = 0;
  67         pool->current_count = 0;
  68         for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
  69                 pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool,
  70                                        GFP_KERNEL, &pool->elements[i].phys);
  71                 if (!pool->elements[i].virt)
  72                         goto fail_free_mbuf_pool;
  73                 pool->max_count++;
  74                 pool->current_count++;
  75         }
  76
  77         phba->mbox_mem_pool = mempool_create(LPFC_MEM_POOL_SIZE,
  78                                 lpfc_pool_kmalloc, lpfc_pool_kfree,
  79                                 (void *)(unsigned long)sizeof(LPFC_MBOXQ_t));
  80         if (!phba->mbox_mem_pool)
  81                 goto fail_free_mbuf_pool;
  82
  83         phba->nlp_mem_pool = mempool_create(LPFC_MEM_POOL_SIZE,
  84                         lpfc_pool_kmalloc, lpfc_pool_kfree,
  85                         (void *)(unsigned long)sizeof(struct lpfc_nodelist));
  86         if (!phba->nlp_mem_pool)
  87                 goto fail_free_mbox_pool;
  88
  89         return 0;
  90
  91  fail_free_mbox_pool:
  92         mempool_destroy(phba->mbox_mem_pool);
  93  fail_free_mbuf_pool:
  94         while (--i)
  95                 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
  96                                                  pool->elements[i].phys);
  97         kfree(pool->elements);
  98         pci_pool_destroy(phba->lpfc_mbuf_pool);
  99  fail_free_dma_buf_pool:
 100         pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
 101  fail:
 102         return -ENOMEM;
 103 }
 104
 105 void
 106 lpfc_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         list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
 115                 mp = (struct lpfc_dmabuf *) (mbox->context1);
 116                 if (mp) {
 117                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 118                         kfree(mp);
 119                 }
 120                 list_del(&mbox->list);
 121                 mempool_free(mbox, phba->mbox_mem_pool);
 122         }
 123
 124         psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
 125         if (psli->mbox_active) {
 126                 mbox = psli->mbox_active;
 127                 mp = (struct lpfc_dmabuf *) (mbox->context1);
 128                 if (mp) {
 129                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 130                         kfree(mp);
 131                 }
 132                 mempool_free(mbox, phba->mbox_mem_pool);
 133                 psli->mbox_active = NULL;
 134         }
 135
 136         for (i = 0; i < pool->current_count; i++)
 137                 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
 138                                                  pool->elements[i].phys);
 139         kfree(pool->elements);
 140         mempool_destroy(phba->nlp_mem_pool);
 141         mempool_destroy(phba->mbox_mem_pool);
 142
 143         pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
 144         pci_pool_destroy(phba->lpfc_mbuf_pool);
 145 }
 146
 147 void *
 148 lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
 149 {
 150         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 151         void *ret;
 152
 153         ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);
 154
 155         if (!ret && ( mem_flags & MEM_PRI) && pool->current_count) {
 156                 pool->current_count--;
 157                 ret = pool->elements[pool->current_count].virt;
 158                 *handle = pool->elements[pool->current_count].phys;
 159         }
 160         return ret;
 161 }
 162
 163 void
 164 lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
 165 {
 166         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 167
 168         if (pool->current_count < pool->max_count) {
 169                 pool->elements[pool->current_count].virt = virt;
 170                 pool->elements[pool->current_count].phys = dma;
 171                 pool->current_count++;
 172         } else {
 173                 pci_pool_free(phba->lpfc_mbuf_pool, virt, dma);
 174         }
 175         return;
 176 }