Merge branch 'master' into upstream-fixes
[linux-2.6] / drivers / scsi / lpfc / lpfc_mem.c
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 }