lpfc_mem.c revision dea3101e0a5c897d2c9351a7444e139db9f40247 
1/*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for         *
3 * Enterprise Fibre Channel Host Bus Adapters.                     *
4 * Refer to the README file included with this package for         *
5 * driver version and adapter support.                             *
6 * Copyright (C) 2004 Emulex Corporation.                          *
7 * www.emulex.com                                                  *
8 *                                                                 *
9 * This program is free software; you can redistribute it and/or   *
10 * modify it under the terms of the GNU General Public License     *
11 * as published by the Free Software Foundation; either version 2  *
12 * of the License, or (at your option) any later version.          *
13 *                                                                 *
14 * This program is distributed in the hope that it will be useful, *
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of  *
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the   *
17 * GNU General Public License for more details, a copy of which    *
18 * can be found in the file COPYING included with this package.    *
19 *******************************************************************/
20
21/*
22 * $Id: lpfc_mem.c 1.79 2005/04/13 14:25:50EDT sf_support Exp  $
23 */
24
25#include <linux/mempool.h>
26#include <linux/pci.h>
27#include <linux/interrupt.h>
28
29#include "lpfc_hw.h"
30#include "lpfc_sli.h"
31#include "lpfc_disc.h"
32#include "lpfc_scsi.h"
33#include "lpfc.h"
34#include "lpfc_crtn.h"
35
36#define LPFC_MBUF_POOL_SIZE     64      /* max elements in MBUF safety pool */
37#define LPFC_MEM_POOL_SIZE      64      /* max elem in non-DMA safety pool */
38
39static void *
40lpfc_pool_kmalloc(unsigned int gfp_flags, void *data)
41{
42	return kmalloc((unsigned long)data, gfp_flags);
43}
44
45static void
46lpfc_pool_kfree(void *obj, void *data)
47{
48	kfree(obj);
49}
50
51int
52lpfc_mem_alloc(struct lpfc_hba * phba)
53{
54	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
55	int i;
56
57	phba->lpfc_scsi_dma_buf_pool = pci_pool_create("lpfc_scsi_dma_buf_pool",
58				phba->pcidev, phba->cfg_sg_dma_buf_size, 8, 0);
59	if (!phba->lpfc_scsi_dma_buf_pool)
60		goto fail;
61
62	phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev,
63							LPFC_BPL_SIZE, 8,0);
64	if (!phba->lpfc_mbuf_pool)
65		goto fail_free_dma_buf_pool;
66
67	pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) *
68					 LPFC_MBUF_POOL_SIZE, GFP_KERNEL);
69	pool->max_count = 0;
70	pool->current_count = 0;
71	for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
72		pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool,
73				       GFP_KERNEL, &pool->elements[i].phys);
74		if (!pool->elements[i].virt)
75			goto fail_free_mbuf_pool;
76		pool->max_count++;
77		pool->current_count++;
78	}
79
80	phba->mbox_mem_pool = mempool_create(LPFC_MEM_POOL_SIZE,
81				lpfc_pool_kmalloc, lpfc_pool_kfree,
82				(void *)(unsigned long)sizeof(LPFC_MBOXQ_t));
83	if (!phba->mbox_mem_pool)
84		goto fail_free_mbuf_pool;
85
86	phba->nlp_mem_pool = mempool_create(LPFC_MEM_POOL_SIZE,
87			lpfc_pool_kmalloc, lpfc_pool_kfree,
88			(void *)(unsigned long)sizeof(struct lpfc_nodelist));
89	if (!phba->nlp_mem_pool)
90		goto fail_free_mbox_pool;
91
92	return 0;
93
94 fail_free_mbox_pool:
95	mempool_destroy(phba->mbox_mem_pool);
96 fail_free_mbuf_pool:
97	while (--i)
98		pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
99						 pool->elements[i].phys);
100	kfree(pool->elements);
101	pci_pool_destroy(phba->lpfc_mbuf_pool);
102 fail_free_dma_buf_pool:
103	pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
104 fail:
105	return -ENOMEM;
106}
107
108void
109lpfc_mem_free(struct lpfc_hba * phba)
110{
111	struct lpfc_sli *psli = &phba->sli;
112	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
113	LPFC_MBOXQ_t *mbox, *next_mbox;
114	struct lpfc_dmabuf   *mp;
115	int i;
116
117	list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
118		mp = (struct lpfc_dmabuf *) (mbox->context1);
119		if (mp) {
120			lpfc_mbuf_free(phba, mp->virt, mp->phys);
121			kfree(mp);
122		}
123		list_del(&mbox->list);
124		mempool_free(mbox, phba->mbox_mem_pool);
125	}
126
127	psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
128	if (psli->mbox_active) {
129		mbox = psli->mbox_active;
130		mp = (struct lpfc_dmabuf *) (mbox->context1);
131		if (mp) {
132			lpfc_mbuf_free(phba, mp->virt, mp->phys);
133			kfree(mp);
134		}
135		mempool_free(mbox, phba->mbox_mem_pool);
136		psli->mbox_active = NULL;
137	}
138
139	for (i = 0; i < pool->current_count; i++)
140		pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
141						 pool->elements[i].phys);
142	kfree(pool->elements);
143	mempool_destroy(phba->nlp_mem_pool);
144	mempool_destroy(phba->mbox_mem_pool);
145
146	pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
147	pci_pool_destroy(phba->lpfc_mbuf_pool);
148}
149
150void *
151lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
152{
153	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
154	void *ret;
155
156	ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);
157
158	if (!ret && ( mem_flags & MEM_PRI) && pool->current_count) {
159		pool->current_count--;
160		ret = pool->elements[pool->current_count].virt;
161		*handle = pool->elements[pool->current_count].phys;
162	}
163	return ret;
164}
165
166void
167lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
168{
169	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
170
171	if (pool->current_count < pool->max_count) {
172		pool->elements[pool->current_count].virt = virt;
173		pool->elements[pool->current_count].phys = dma;
174		pool->current_count++;
175	} else {
176		pci_pool_free(phba->lpfc_mbuf_pool, virt, dma);
177	}
178	return;
179}
180