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 int 42 lpfc_mem_alloc(struct lpfc_hba * phba) 43 { 44 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; 45 int i; 46 47 phba->lpfc_scsi_dma_buf_pool = pci_pool_create("lpfc_scsi_dma_buf_pool", 48 phba->pcidev, phba->cfg_sg_dma_buf_size, 8, 0); 49 if (!phba->lpfc_scsi_dma_buf_pool) 50 goto fail; 51 52 phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev, 53 LPFC_BPL_SIZE, 8,0); 54 if (!phba->lpfc_mbuf_pool) 55 goto fail_free_dma_buf_pool; 56 57 pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) * 58 LPFC_MBUF_POOL_SIZE, GFP_KERNEL); 59 if (!pool->elements) 60 goto fail_free_lpfc_mbuf_pool; 61 62 pool->max_count = 0; 63 pool->current_count = 0; 64 for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) { 65 pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool, 66 GFP_KERNEL, &pool->elements[i].phys); 67 if (!pool->elements[i].virt) 68 goto fail_free_mbuf_pool; 69 pool->max_count++; 70 pool->current_count++; 71 } 72 73 phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE, 74 sizeof(LPFC_MBOXQ_t)); 75 if (!phba->mbox_mem_pool) 76 goto fail_free_mbuf_pool; 77 78 phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE, 79 sizeof(struct lpfc_nodelist)); 80 if (!phba->nlp_mem_pool) 81 goto fail_free_mbox_pool; 82 83 return 0; 84 85 fail_free_mbox_pool: 86 mempool_destroy(phba->mbox_mem_pool); 87 fail_free_mbuf_pool: 88 while (i--) 89 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt, 90 pool->elements[i].phys); 91 kfree(pool->elements); 92 fail_free_lpfc_mbuf_pool: 93 pci_pool_destroy(phba->lpfc_mbuf_pool); 94 fail_free_dma_buf_pool: 95 pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool); 96 fail: 97 return -ENOMEM; 98 } 99 100 void 101 lpfc_mem_free(struct lpfc_hba * phba) 102 { 103 struct lpfc_sli *psli = &phba->sli; 104 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; 105 LPFC_MBOXQ_t *mbox, *next_mbox; 106 struct lpfc_dmabuf *mp; 107 int i; 108 109 list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) { 110 mp = (struct lpfc_dmabuf *) (mbox->context1); 111 if (mp) { 112 lpfc_mbuf_free(phba, mp->virt, mp->phys); 113 kfree(mp); 114 } 115 list_del(&mbox->list); 116 mempool_free(mbox, phba->mbox_mem_pool); 117 } 118 119 psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE; 120 if (psli->mbox_active) { 121 mbox = psli->mbox_active; 122 mp = (struct lpfc_dmabuf *) (mbox->context1); 123 if (mp) { 124 lpfc_mbuf_free(phba, mp->virt, mp->phys); 125 kfree(mp); 126 } 127 mempool_free(mbox, phba->mbox_mem_pool); 128 psli->mbox_active = NULL; 129 } 130 131 for (i = 0; i < pool->current_count; i++) 132 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt, 133 pool->elements[i].phys); 134 kfree(pool->elements); 135 mempool_destroy(phba->nlp_mem_pool); 136 mempool_destroy(phba->mbox_mem_pool); 137 138 pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool); 139 pci_pool_destroy(phba->lpfc_mbuf_pool); 140 141 /* Free the iocb lookup array */ 142 kfree(psli->iocbq_lookup); 143 psli->iocbq_lookup = NULL; 144 145 } 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 } 177