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         /* vpi zero is reserved for the physical port so add 1 to max */
  92         longs = ((phba->max_vpi + 1) + BITS_PER_LONG - 1) / BITS_PER_LONG;
  93         phba->vpi_bmask = kzalloc(longs * sizeof(unsigned long), GFP_KERNEL);
  94         if (!phba->vpi_bmask)
  95                 goto fail_free_hbq_pool;
  96
  97         return 0;
  98
  99  fail_free_hbq_pool:
 100         lpfc_sli_hbqbuf_free_all(phba);
 101  fail_free_nlp_mem_pool:
 102         mempool_destroy(phba->nlp_mem_pool);
 103         phba->nlp_mem_pool = NULL;
 104  fail_free_mbox_pool:
 105         mempool_destroy(phba->mbox_mem_pool);
 106         phba->mbox_mem_pool = NULL;
 107  fail_free_mbuf_pool:
 108         while (i--)
 109                 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
 110                                                  pool->elements[i].phys);
 111         kfree(pool->elements);
 112  fail_free_lpfc_mbuf_pool:
 113         pci_pool_destroy(phba->lpfc_mbuf_pool);
 114         phba->lpfc_mbuf_pool = NULL;
 115  fail_free_dma_buf_pool:
 116         pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
 117         phba->lpfc_scsi_dma_buf_pool = NULL;
 118  fail:
 119         return -ENOMEM;
 120 }
 121
 122 void
 123 lpfc_mem_free(struct lpfc_hba * phba)
 124 {
 125         struct lpfc_sli *psli = &phba->sli;
 126         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 127         LPFC_MBOXQ_t *mbox, *next_mbox;
 128         struct lpfc_dmabuf   *mp;
 129         int i;
 130
 131         kfree(phba->vpi_bmask);
 132         lpfc_sli_hbqbuf_free_all(phba);
 133
 134         list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
 135                 mp = (struct lpfc_dmabuf *) (mbox->context1);
 136                 if (mp) {
 137                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 138                         kfree(mp);
 139                 }
 140                 list_del(&mbox->list);
 141                 mempool_free(mbox, phba->mbox_mem_pool);
 142         }
 143         list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq_cmpl, list) {
 144                 mp = (struct lpfc_dmabuf *) (mbox->context1);
 145                 if (mp) {
 146                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 147                         kfree(mp);
 148                 }
 149                 list_del(&mbox->list);
 150                 mempool_free(mbox, phba->mbox_mem_pool);
 151         }
 152
 153         psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
 154         if (psli->mbox_active) {
 155                 mbox = psli->mbox_active;
 156                 mp = (struct lpfc_dmabuf *) (mbox->context1);
 157                 if (mp) {
 158                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 159                         kfree(mp);
 160                 }
 161                 mempool_free(mbox, phba->mbox_mem_pool);
 162                 psli->mbox_active = NULL;
 163         }
 164
 165         for (i = 0; i < pool->current_count; i++)
 166                 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
 167                                                  pool->elements[i].phys);
 168         kfree(pool->elements);
 169
 170         pci_pool_destroy(phba->lpfc_hbq_pool);
 171         mempool_destroy(phba->nlp_mem_pool);
 172         mempool_destroy(phba->mbox_mem_pool);
 173
 174         pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
 175         pci_pool_destroy(phba->lpfc_mbuf_pool);
 176
 177         phba->lpfc_hbq_pool = NULL;
 178         phba->nlp_mem_pool = NULL;
 179         phba->mbox_mem_pool = NULL;
 180         phba->lpfc_scsi_dma_buf_pool = NULL;
 181         phba->lpfc_mbuf_pool = NULL;
 182
 183                                 /* Free the iocb lookup array */
 184         kfree(psli->iocbq_lookup);
 185         psli->iocbq_lookup = NULL;
 186
 187 }
 188
 189 void *
 190 lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
 191 {
 192         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 193         unsigned long iflags;
 194         void *ret;
 195
 196         ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);
 197
 198         spin_lock_irqsave(&phba->hbalock, iflags);
 199         if (!ret && (mem_flags & MEM_PRI) && pool->current_count) {
 200                 pool->current_count--;
 201                 ret = pool->elements[pool->current_count].virt;
 202                 *handle = pool->elements[pool->current_count].phys;
 203         }
 204         spin_unlock_irqrestore(&phba->hbalock, iflags);
 205         return ret;
 206 }
 207
 208 void
 209 __lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
 210 {
 211         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 212
 213         if (pool->current_count < pool->max_count) {
 214                 pool->elements[pool->current_count].virt = virt;
 215                 pool->elements[pool->current_count].phys = dma;
 216                 pool->current_count++;
 217         } else {
 218                 pci_pool_free(phba->lpfc_mbuf_pool, virt, dma);
 219         }
 220         return;
 221 }
 222
 223 void
 224 lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
 225 {
 226         unsigned long iflags;
 227
 228         spin_lock_irqsave(&phba->hbalock, iflags);
 229         __lpfc_mbuf_free(phba, virt, dma);
 230         spin_unlock_irqrestore(&phba->hbalock, iflags);
 231         return;
 232 }
 233
 234 struct hbq_dmabuf *
 235 lpfc_els_hbq_alloc(struct lpfc_hba *phba)
 236 {
 237         struct hbq_dmabuf *hbqbp;
 238
 239         hbqbp = kmalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
 240         if (!hbqbp)
 241                 return NULL;
 242
 243         hbqbp->dbuf.virt = pci_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL,
 244                                           &hbqbp->dbuf.phys);
 245         if (!hbqbp->dbuf.virt) {
 246                 kfree(hbqbp);
 247                 return NULL;
 248         }
 249         hbqbp->size = LPFC_BPL_SIZE;
 250         return hbqbp;
 251 }
 252
 253 void
 254 lpfc_els_hbq_free(struct lpfc_hba *phba, struct hbq_dmabuf *hbqbp)
 255 {
 256         pci_pool_free(phba->lpfc_hbq_pool, hbqbp->dbuf.virt, hbqbp->dbuf.phys);
 257         kfree(hbqbp);
 258         return;
 259 }
 260
 261 /* This is ONLY called for the LPFC_ELS_HBQ */
 262 void
 263 lpfc_in_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
 264 {
 265         struct hbq_dmabuf *hbq_entry;
 266
 267         if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
 268                 hbq_entry = container_of(mp, struct hbq_dmabuf, dbuf);
 269                 if (hbq_entry->tag == -1) {
 270                         (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer)
 271                                 (phba, hbq_entry);
 272                 } else {
 273                         lpfc_sli_free_hbq(phba, hbq_entry);
 274                 }
 275         } else {
 276                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
 277                 kfree(mp);
 278         }
 279         return;
 280 }
 281