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 1.69 2004/09/28 07:54:24EDT sf_support Exp  $
  23  */
  24
  25 #include <linux/mempool.h>
  26 #include <linux/pci.h>
  27 #include <linux/slab.h>
  28 #include <scsi/scsi_device.h>
  29
  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 #include "lpfc_mem.h"
  36
  37 static void *
  38 lpfc_pool_kmalloc(int gfp_flags, void *data)
  39 {
  40         return kmalloc((unsigned long)data, gfp_flags);
  41 }
  42
  43 static void
  44 lpfc_pool_kfree(void *obj, void *data)
  45 {
  46         kfree(obj);
  47 }
  48
  49 int
  50 lpfc_mem_alloc(struct lpfc_hba * phba)
  51 {
  52         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
  53         int i;
  54
  55         phba->lpfc_scsi_dma_ext_pool = pci_pool_create("lpfc_scsi_dma_ext_pool",
  56                                 phba->pcidev, LPFC_SCSI_DMA_EXT_SIZE, 8, 0);
  57         if (!phba->lpfc_scsi_dma_ext_pool)
  58                 goto fail;
  59
  60         phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev,
  61                                                         LPFC_BPL_SIZE, 8,0);
  62         if (!phba->lpfc_mbuf_pool)
  63                 goto fail_free_dma_ext_pool;
  64
  65         pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) *
  66                                          LPFC_MBUF_POOL_SIZE, GFP_KERNEL);
  67         pool->max_count = 0;
  68         pool->current_count = 0;
  69         for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
  70                 pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool,
  71                                        GFP_KERNEL, &pool->elements[i].phys);
  72                 if (!pool->elements[i].virt)
  73                         goto fail_free_mbuf_pool;
  74                 pool->max_count++;
  75                 pool->current_count++;
  76         }
  77
  78         phba->iocb_mem_pool = mempool_create(LPFC_MEM_POOL_SIZE,
  79                         lpfc_pool_kmalloc, lpfc_pool_kfree,
  80                         (void *)(unsigned long)sizeof(struct lpfc_iocbq));
  81         if (!phba->iocb_mem_pool)
  82                 goto fail_free_mbuf_pool;
  83
  84         phba->scsibuf_mem_pool = mempool_create(LPFC_MEM_POOL_SIZE,
  85                         lpfc_pool_kmalloc, lpfc_pool_kfree,
  86                         (void *)(unsigned long)sizeof(struct lpfc_scsi_buf));
  87         if (!phba->scsibuf_mem_pool)
  88                 goto fail_free_iocb_pool;
  89
  90         phba->mbox_mem_pool = mempool_create(LPFC_MEM_POOL_SIZE,
  91                                 lpfc_pool_kmalloc, lpfc_pool_kfree,
  92                                 (void *)(unsigned long)sizeof(LPFC_MBOXQ_t));
  93         if (!phba->mbox_mem_pool)
  94                 goto fail_free_scsibuf_pool;
  95
  96         phba->nlp_mem_pool = mempool_create(LPFC_MEM_POOL_SIZE,
  97                         lpfc_pool_kmalloc, lpfc_pool_kfree,
  98                         (void *)(unsigned long)sizeof(struct lpfc_nodelist));
  99         if (!phba->nlp_mem_pool)
 100                 goto fail_free_mbox_pool;
 101
 102         phba->bind_mem_pool = mempool_create(LPFC_MEM_POOL_SIZE,
 103                         lpfc_pool_kmalloc, lpfc_pool_kfree,
 104                         (void *)(unsigned long)sizeof(struct lpfc_bindlist));
 105         if (!phba->bind_mem_pool)
 106                 goto fail_free_nlp_pool;
 107
 108         return 0;
 109
 110  fail_free_nlp_pool:
 111         mempool_destroy(phba->nlp_mem_pool);
 112  fail_free_mbox_pool:
 113         mempool_destroy(phba->mbox_mem_pool);
 114  fail_free_scsibuf_pool:
 115         mempool_destroy(phba->scsibuf_mem_pool);
 116  fail_free_iocb_pool:
 117         mempool_destroy(phba->iocb_mem_pool);
 118  fail_free_mbuf_pool:
 119         while (--i)
 120                 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
 121                                                  pool->elements[i].phys);
 122         kfree(pool->elements);
 123         pci_pool_destroy(phba->lpfc_mbuf_pool);
 124  fail_free_dma_ext_pool:
 125         pci_pool_destroy(phba->lpfc_scsi_dma_ext_pool);
 126  fail:
 127         return -ENOMEM;
 128 }
 129
 130 void
 131 lpfc_mem_free(struct lpfc_hba * phba)
 132 {
 133         struct lpfc_sli *psli = &phba->sli;
 134         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 135         LPFC_MBOXQ_t *mbox, *next_mbox;
 136         int i;
 137
 138         list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
 139                 list_del(&mbox->list);
 140                 mempool_free(mbox, phba->mbox_mem_pool);
 141         }
 142
 143         psli->sliinit.sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
 144         if (psli->mbox_active) {
 145                 mempool_free(psli->mbox_active, phba->mbox_mem_pool);
 146                 psli->mbox_active = NULL;
 147         }
 148
 149         for (i = 0; i < pool->current_count; i++)
 150                 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
 151                                                  pool->elements[i].phys);
 152         kfree(pool->elements);
 153         mempool_destroy(phba->bind_mem_pool);
 154         mempool_destroy(phba->nlp_mem_pool);
 155         mempool_destroy(phba->mbox_mem_pool);
 156         mempool_destroy(phba->scsibuf_mem_pool);
 157         mempool_destroy(phba->iocb_mem_pool);
 158
 159         pci_pool_destroy(phba->lpfc_scsi_dma_ext_pool);
 160         pci_pool_destroy(phba->lpfc_mbuf_pool);
 161 }
 162
 163 void *
 164 lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
 165 {
 166         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 167         void *ret;
 168
 169         ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_ATOMIC, handle);
 170
 171         if (!ret && ( mem_flags & MEM_PRI) && pool->current_count) {
 172                 pool->current_count--;
 173                 ret = pool->elements[pool->current_count].virt;
 174                 *handle = pool->elements[pool->current_count].phys;
 175         }
 176         return ret;
 177 }
 178
 179 void
 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 }