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 "lpfc_hw.h" 27 #include "lpfc_sli.h" 28 #include "lpfc_disc.h" 29 #include "lpfc_scsi.h" 30 #include "lpfc.h" 31 #include "lpfc_crtn.h" 32 33 #define LPFC_MBUF_POOL_SIZE 64 /* max elements in MBUF safety pool */ 34 #define LPFC_MEM_POOL_SIZE 64 /* max elem in non-DMA safety pool */ 35 36 static void * 37 lpfc_pool_kmalloc(unsigned int gfp_flags, void *data) 38 { 39 return kmalloc((unsigned long)data, gfp_flags); 40 } 41 42 static void 43 lpfc_pool_kfree(void *obj, void *data) 44 { 45 kfree(obj); 46 } 47 48 int 49 lpfc_mem_alloc(struct lpfc_hba * phba) 50 { 51 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; 52 int i; 53 54 phba->lpfc_scsi_dma_buf_pool = pci_pool_create("lpfc_scsi_dma_buf_pool", 55 phba->pcidev, phba->cfg_sg_dma_buf_size, 8, 0); 56 if (!phba->lpfc_scsi_dma_buf_pool) 57 goto fail; 58 59 phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev, 60 LPFC_BPL_SIZE, 8,0); 61 if (!phba->lpfc_mbuf_pool) 62 goto fail_free_dma_buf_pool; 63 64 pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) * 65 LPFC_MBUF_POOL_SIZE, GFP_KERNEL); 66 pool->max_count = 0; 67 pool->current_count = 0; 68 for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) { 69 pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool, 70 GFP_KERNEL, &pool->elements[i].phys); 71 if (!pool->elements[i].virt) 72 goto fail_free_mbuf_pool; 73 pool->max_count++; 74 pool->current_count++; 75 } 76 77 phba->mbox_mem_pool = mempool_create(LPFC_MEM_POOL_SIZE, 78 lpfc_pool_kmalloc, lpfc_pool_kfree, 79 (void *)(unsigned long)sizeof(LPFC_MBOXQ_t)); 80 if (!phba->mbox_mem_pool) 81 goto fail_free_mbuf_pool; 82 83 phba->nlp_mem_pool = mempool_create(LPFC_MEM_POOL_SIZE, 84 lpfc_pool_kmalloc, lpfc_pool_kfree, 85 (void *)(unsigned long)sizeof(struct lpfc_nodelist)); 86 if (!phba->nlp_mem_pool) 87 goto fail_free_mbox_pool; 88 89 return 0; 90 91 fail_free_mbox_pool: 92 mempool_destroy(phba->mbox_mem_pool); 93 fail_free_mbuf_pool: 94 while (--i) 95 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt, 96 pool->elements[i].phys); 97 kfree(pool->elements); 98 pci_pool_destroy(phba->lpfc_mbuf_pool); 99 fail_free_dma_buf_pool: 100 pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool); 101 fail: 102 return -ENOMEM; 103 } 104 105 void 106 lpfc_mem_free(struct lpfc_hba * phba) 107 { 108 struct lpfc_sli *psli = &phba->sli; 109 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; 110 LPFC_MBOXQ_t *mbox, *next_mbox; 111 struct lpfc_dmabuf *mp; 112 int i; 113 114 list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) { 115 mp = (struct lpfc_dmabuf *) (mbox->context1); 116 if (mp) { 117 lpfc_mbuf_free(phba, mp->virt, mp->phys); 118 kfree(mp); 119 } 120 list_del(&mbox->list); 121 mempool_free(mbox, phba->mbox_mem_pool); 122 } 123 124 psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE; 125 if (psli->mbox_active) { 126 mbox = psli->mbox_active; 127 mp = (struct lpfc_dmabuf *) (mbox->context1); 128 if (mp) { 129 lpfc_mbuf_free(phba, mp->virt, mp->phys); 130 kfree(mp); 131 } 132 mempool_free(mbox, phba->mbox_mem_pool); 133 psli->mbox_active = NULL; 134 } 135 136 for (i = 0; i < pool->current_count; i++) 137 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt, 138 pool->elements[i].phys); 139 kfree(pool->elements); 140 mempool_destroy(phba->nlp_mem_pool); 141 mempool_destroy(phba->mbox_mem_pool); 142 143 pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool); 144 pci_pool_destroy(phba->lpfc_mbuf_pool); 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