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 pool->max_count = 0; 60 pool->current_count = 0; 61 for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) { 62 pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool, 63 GFP_KERNEL, &pool->elements[i].phys); 64 if (!pool->elements[i].virt) 65 goto fail_free_mbuf_pool; 66 pool->max_count++; 67 pool->current_count++; 68 } 69 70 phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE, 71 sizeof(LPFC_MBOXQ_t)); 72 if (!phba->mbox_mem_pool) 73 goto fail_free_mbuf_pool; 74 75 phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE, 76 sizeof(struct lpfc_nodelist)); 77 if (!phba->nlp_mem_pool) 78 goto fail_free_mbox_pool; 79 80 return 0; 81 82 fail_free_mbox_pool: 83 mempool_destroy(phba->mbox_mem_pool); 84 fail_free_mbuf_pool: 85 while (--i) 86 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt, 87 pool->elements[i].phys); 88 kfree(pool->elements); 89 pci_pool_destroy(phba->lpfc_mbuf_pool); 90 fail_free_dma_buf_pool: 91 pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool); 92 fail: 93 return -ENOMEM; 94 } 95 96 void 97 lpfc_mem_free(struct lpfc_hba * phba) 98 { 99 struct lpfc_sli *psli = &phba->sli; 100 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; 101 LPFC_MBOXQ_t *mbox, *next_mbox; 102 struct lpfc_dmabuf *mp; 103 int i; 104 105 list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) { 106 mp = (struct lpfc_dmabuf *) (mbox->context1); 107 if (mp) { 108 lpfc_mbuf_free(phba, mp->virt, mp->phys); 109 kfree(mp); 110 } 111 list_del(&mbox->list); 112 mempool_free(mbox, phba->mbox_mem_pool); 113 } 114 115 psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE; 116 if (psli->mbox_active) { 117 mbox = psli->mbox_active; 118 mp = (struct lpfc_dmabuf *) (mbox->context1); 119 if (mp) { 120 lpfc_mbuf_free(phba, mp->virt, mp->phys); 121 kfree(mp); 122 } 123 mempool_free(mbox, phba->mbox_mem_pool); 124 psli->mbox_active = NULL; 125 } 126 127 for (i = 0; i < pool->current_count; i++) 128 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt, 129 pool->elements[i].phys); 130 kfree(pool->elements); 131 mempool_destroy(phba->nlp_mem_pool); 132 mempool_destroy(phba->mbox_mem_pool); 133 134 pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool); 135 pci_pool_destroy(phba->lpfc_mbuf_pool); 136 137 /* Free the iocb lookup array */ 138 kfree(psli->iocbq_lookup); 139 psli->iocbq_lookup = NULL; 140 141 } 142 143 void * 144 lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle) 145 { 146 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; 147 void *ret; 148 149 ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle); 150 151 if (!ret && ( mem_flags & MEM_PRI) && pool->current_count) { 152 pool->current_count--; 153 ret = pool->elements[pool->current_count].virt; 154 *handle = pool->elements[pool->current_count].phys; 155 } 156 return ret; 157 } 158 159 void 160 lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma) 161 { 162 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; 163 164 if (pool->current_count < pool->max_count) { 165 pool->elements[pool->current_count].virt = virt; 166 pool->elements[pool->current_count].phys = dma; 167 pool->current_count++; 168 } else { 169 pci_pool_free(phba->lpfc_mbuf_pool, virt, dma); 170 } 171 return; 172 } 173