summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/lpfc/lpfc_mem.c
blob: 4397e1160712d7da8a5f4eb7c980ffe98f002815 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Enterprise Fibre Channel Host Bus Adapters.                     *
 * Refer to the README file included with this package for         *
 * driver version and adapter support.                             *
 * Copyright (C) 2004 Emulex Corporation.                          *
 * www.emulex.com                                                  *
 *                                                                 *
 * This program is free software; you can redistribute it and/or   *
 * modify it under the terms of the GNU General Public License     *
 * as published by the Free Software Foundation; either version 2  *
 * of the License, or (at your option) any later version.          *
 *                                                                 *
 * This program is distributed in the hope that it will be useful, *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of  *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the   *
 * GNU General Public License for more details, a copy of which    *
 * can be found in the file COPYING included with this package.    *
 *******************************************************************/

/*
 * $Id: lpfc_mem.c 1.79 2005/04/13 14:25:50EDT sf_support Exp  $
 */

#include <linux/mempool.h>
#include <linux/pci.h>
#include <linux/interrupt.h>

#include "lpfc_hw.h"
#include "lpfc_sli.h"
#include "lpfc_disc.h"
#include "lpfc_scsi.h"
#include "lpfc.h"
#include "lpfc_crtn.h"

#define LPFC_MBUF_POOL_SIZE     64      /* max elements in MBUF safety pool */
#define LPFC_MEM_POOL_SIZE      64      /* max elem in non-DMA safety pool */

static void *
lpfc_pool_kmalloc(unsigned int gfp_flags, void *data)
{
	return kmalloc((unsigned long)data, gfp_flags);
}

static void
lpfc_pool_kfree(void *obj, void *data)
{
	kfree(obj);
}

int
lpfc_mem_alloc(struct lpfc_hba * phba)
{
	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
	int i;

	phba->lpfc_scsi_dma_buf_pool = pci_pool_create("lpfc_scsi_dma_buf_pool",
				phba->pcidev, phba->cfg_sg_dma_buf_size, 8, 0);
	if (!phba->lpfc_scsi_dma_buf_pool)
		goto fail;

	phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev,
							LPFC_BPL_SIZE, 8,0);
	if (!phba->lpfc_mbuf_pool)
		goto fail_free_dma_buf_pool;

	pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) *
					 LPFC_MBUF_POOL_SIZE, GFP_KERNEL);
	pool->max_count = 0;
	pool->current_count = 0;
	for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
		pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool,
				       GFP_KERNEL, &pool->elements[i].phys);
		if (!pool->elements[i].virt)
			goto fail_free_mbuf_pool;
		pool->max_count++;
		pool->current_count++;
	}

	phba->mbox_mem_pool = mempool_create(LPFC_MEM_POOL_SIZE,
				lpfc_pool_kmalloc, lpfc_pool_kfree,
				(void *)(unsigned long)sizeof(LPFC_MBOXQ_t));
	if (!phba->mbox_mem_pool)
		goto fail_free_mbuf_pool;

	phba->nlp_mem_pool = mempool_create(LPFC_MEM_POOL_SIZE,
			lpfc_pool_kmalloc, lpfc_pool_kfree,
			(void *)(unsigned long)sizeof(struct lpfc_nodelist));
	if (!phba->nlp_mem_pool)
		goto fail_free_mbox_pool;

	return 0;

 fail_free_mbox_pool:
	mempool_destroy(phba->mbox_mem_pool);
 fail_free_mbuf_pool:
	while (--i)
		pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
						 pool->elements[i].phys);
	kfree(pool->elements);
	pci_pool_destroy(phba->lpfc_mbuf_pool);
 fail_free_dma_buf_pool:
	pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
 fail:
	return -ENOMEM;
}

void
lpfc_mem_free(struct lpfc_hba * phba)
{
	struct lpfc_sli *psli = &phba->sli;
	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
	LPFC_MBOXQ_t *mbox, *next_mbox;
	struct lpfc_dmabuf   *mp;
	int i;

	list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
		mp = (struct lpfc_dmabuf *) (mbox->context1);
		if (mp) {
			lpfc_mbuf_free(phba, mp->virt, mp->phys);
			kfree(mp);
		}
		list_del(&mbox->list);
		mempool_free(mbox, phba->mbox_mem_pool);
	}

	psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
	if (psli->mbox_active) {
		mbox = psli->mbox_active;
		mp = (struct lpfc_dmabuf *) (mbox->context1);
		if (mp) {
			lpfc_mbuf_free(phba, mp->virt, mp->phys);
			kfree(mp);
		}
		mempool_free(mbox, phba->mbox_mem_pool);
		psli->mbox_active = NULL;
	}

	for (i = 0; i < pool->current_count; i++)
		pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
						 pool->elements[i].phys);
	kfree(pool->elements);
	mempool_destroy(phba->nlp_mem_pool);
	mempool_destroy(phba->mbox_mem_pool);

	pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
	pci_pool_destroy(phba->lpfc_mbuf_pool);
}

void *
lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
{
	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
	void *ret;

	ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);

	if (!ret && ( mem_flags & MEM_PRI) && pool->current_count) {
		pool->current_count--;
		ret = pool->elements[pool->current_count].virt;
		*handle = pool->elements[pool->current_count].phys;
	}
	return ret;
}

void
lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
{
	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;

	if (pool->current_count < pool->max_count) {
		pool->elements[pool->current_count].virt = virt;
		pool->elements[pool->current_count].phys = dma;
		pool->current_count++;
	} else {
		pci_pool_free(phba->lpfc_mbuf_pool, virt, dma);
	}
	return;
}
OpenPOWER on IntegriCloud