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) 2004-2006 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
  42
  43 int
  44 lpfc_mem_alloc(struct lpfc_hba * phba)
  45 {
  46         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
  47         int longs;
  48         int i;
  49
  50         phba->lpfc_scsi_dma_buf_pool = pci_pool_create("lpfc_scsi_dma_buf_pool",
  51                                 phba->pcidev, phba->cfg_sg_dma_buf_size, 8, 0);
  52         if (!phba->lpfc_scsi_dma_buf_pool)
  53                 goto fail;
  54
  55         phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev,
  56                                                         LPFC_BPL_SIZE, 8,0);
  57         if (!phba->lpfc_mbuf_pool)
  58                 goto fail_free_dma_buf_pool;
  59
  60         pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) *
  61                                          LPFC_MBUF_POOL_SIZE, GFP_KERNEL);
  62         if (!pool->elements)
  63                 goto fail_free_lpfc_mbuf_pool;
  64
  65         pool->max_count = 0;
  66         pool->current_count = 0;
  67         for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
  68                 pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool,
  69                                        GFP_KERNEL, &pool->elements[i].phys);
  70                 if (!pool->elements[i].virt)
  71                         goto fail_free_mbuf_pool;
  72                 pool->max_count++;
  73                 pool->current_count++;
  74         }
  75
  76         phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
  77                                                          sizeof(LPFC_MBOXQ_t));
  78         if (!phba->mbox_mem_pool)
  79                 goto fail_free_mbuf_pool;
  80
  81         phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
  82                                                 sizeof(struct lpfc_nodelist));
  83         if (!phba->nlp_mem_pool)
  84                 goto fail_free_mbox_pool;
  85
  86         phba->lpfc_hbq_pool = pci_pool_create("lpfc_hbq_pool",phba->pcidev,
  87                                               LPFC_BPL_SIZE, 8, 0);
  88         if (!phba->lpfc_hbq_pool)
  89                 goto fail_free_nlp_mem_pool;
  90
  91         longs = (phba->max_vpi + BITS_PER_LONG - 1) / BITS_PER_LONG;
  92         phba->vpi_bmask = kzalloc(longs * sizeof(unsigned long), GFP_KERNEL);
  93         if (!phba->vpi_bmask)
  94                 goto fail_free_hbq_pool;
  95
  96         return 0;
  97
  98  fail_free_hbq_pool:
  99         lpfc_sli_hbqbuf_free_all(phba);
 100  fail_free_nlp_mem_pool:
 101         mempool_destroy(phba->nlp_mem_pool);
 102         phba->nlp_mem_pool = NULL;
 103  fail_free_mbox_pool:
 104         mempool_destroy(phba->mbox_mem_pool);
 105         phba->mbox_mem_pool = NULL;
 106  fail_free_mbuf_pool:
 107         while (i--)
 108                 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
 109                                                  pool->elements[i].phys);
 110         kfree(pool->elements);
 111  fail_free_lpfc_mbuf_pool:
 112         pci_pool_destroy(phba->lpfc_mbuf_pool);
 113         phba->lpfc_mbuf_pool = NULL;
 114  fail_free_dma_buf_pool:
 115         pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
 116         phba->lpfc_scsi_dma_buf_pool = NULL;
 117  fail:
 118         return -ENOMEM;
 119 }
 120
 121 void
 122 lpfc_mem_free(struct lpfc_hba * phba)
 123 {
 124         struct lpfc_sli *psli = &phba->sli;
 125         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 126         LPFC_MBOXQ_t *mbox, *next_mbox;
 127         struct lpfc_dmabuf   *mp;
 128         int i;
 129
 130         kfree(phba->vpi_bmask);
 131         lpfc_sli_hbqbuf_free_all(phba);
 132
 133         list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
 134                 mp = (struct lpfc_dmabuf *) (mbox->context1);
 135                 if (mp) {
 136                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 137                         kfree(mp);
 138                 }
 139                 list_del(&mbox->list);
 140                 mempool_free(mbox, phba->mbox_mem_pool);
 141         }
 142         list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq_cmpl, list) {
 143                 mp = (struct lpfc_dmabuf *) (mbox->context1);
 144                 if (mp) {
 145                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 146                         kfree(mp);
 147                 }
 148                 list_del(&mbox->list);
 149                 mempool_free(mbox, phba->mbox_mem_pool);
 150         }
 151
 152         psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
 153         if (psli->mbox_active) {
 154                 mbox = psli->mbox_active;
 155                 mp = (struct lpfc_dmabuf *) (mbox->context1);
 156                 if (mp) {
 157                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 158                         kfree(mp);
 159                 }
 160                 mempool_free(mbox, phba->mbox_mem_pool);
 161                 psli->mbox_active = NULL;
 162         }
 163
 164         for (i = 0; i < pool->current_count; i++)
 165                 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
 166                                                  pool->elements[i].phys);
 167         kfree(pool->elements);
 168
 169         pci_pool_destroy(phba->lpfc_hbq_pool);
 170         mempool_destroy(phba->nlp_mem_pool);
 171         mempool_destroy(phba->mbox_mem_pool);
 172
 173         pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
 174         pci_pool_destroy(phba->lpfc_mbuf_pool);
 175
 176         phba->lpfc_hbq_pool = NULL;
 177         phba->nlp_mem_pool = NULL;
 178         phba->mbox_mem_pool = NULL;
 179         phba->lpfc_scsi_dma_buf_pool = NULL;
 180         phba->lpfc_mbuf_pool = NULL;
 181
 182                                 /* Free the iocb lookup array */
 183         kfree(psli->iocbq_lookup);
 184         psli->iocbq_lookup = NULL;
 185
 186 }
 187
 188 void *
 189 lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
 190 {
 191         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 192         unsigned long iflags;
 193         void *ret;
 194
 195         ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);
 196
 197         spin_lock_irqsave(&phba->hbalock, iflags);
 198         if (!ret && (mem_flags & MEM_PRI) && pool->current_count) {
 199                 pool->current_count--;
 200                 ret = pool->elements[pool->current_count].virt;
 201                 *handle = pool->elements[pool->current_count].phys;
 202         }
 203         spin_unlock_irqrestore(&phba->hbalock, iflags);
 204         return ret;
 205 }
 206
 207 void
 208 __lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
 209 {
 210         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 211
 212         if (pool->current_count < pool->max_count) {
 213                 pool->elements[pool->current_count].virt = virt;
 214                 pool->elements[pool->current_count].phys = dma;
 215                 pool->current_count++;
 216         } else {
 217                 pci_pool_free(phba->lpfc_mbuf_pool, virt, dma);
 218         }
 219         return;
 220 }
 221
 222 void
 223 lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
 224 {
 225         unsigned long iflags;
 226
 227         spin_lock_irqsave(&phba->hbalock, iflags);
 228         __lpfc_mbuf_free(phba, virt, dma);
 229         spin_unlock_irqrestore(&phba->hbalock, iflags);
 230         return;
 231 }
 232
 233 void *
 234 lpfc_hbq_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
 235 {
 236         void *ret;
 237         ret = pci_pool_alloc(phba->lpfc_hbq_pool, GFP_ATOMIC, handle);
 238         return ret;
 239 }
 240
 241 void
 242 lpfc_hbq_free(struct lpfc_hba *phba, void *virt, dma_addr_t dma)
 243 {
 244         pci_pool_free(phba->lpfc_hbq_pool, virt, dma);
 245         return;
 246 }
 247
 248 void
 249 lpfc_in_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
 250 {
 251         struct hbq_dmabuf *hbq_entry;
 252
 253         if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
 254                 hbq_entry = container_of(mp, struct hbq_dmabuf, dbuf);
 255                 if (hbq_entry->tag == -1) {
 256                         lpfc_hbq_free(phba, hbq_entry->dbuf.virt,
 257                                       hbq_entry->dbuf.phys);
 258                         kfree(hbq_entry);
 259                 } else {
 260                         lpfc_sli_free_hbq(phba, hbq_entry);
 261                 }
 262         } else {
 263                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
 264                 kfree(mp);
 265         }
 266         return;
 267 }
 268