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1// SPDX-License-Identifier: GPL-2.0-only
2/****************************************************************************
3 * Driver for Solarflare network controllers and boards
4 * Copyright 2005-2006 Fen Systems Ltd.
5 * Copyright 2006-2013 Solarflare Communications Inc.
6 */
7
8#include <linux/module.h>
9#include <linux/mtd/mtd.h>
10#include <linux/slab.h>
11#include <linux/rtnetlink.h>
12
13#include "net_driver.h"
14#include "efx.h"
15
16#define to_ef4_mtd_partition(mtd) \
17 container_of(mtd, struct ef4_mtd_partition, mtd)
18
19/* MTD interface */
20
21static int ef4_mtd_erase(struct mtd_info *mtd, struct erase_info *erase)
22{
23 struct ef4_nic *efx = mtd->priv;
24
25 return efx->type->mtd_erase(mtd, erase->addr, erase->len);
26}
27
28static void ef4_mtd_sync(struct mtd_info *mtd)
29{
30 struct ef4_mtd_partition *part = to_ef4_mtd_partition(mtd);
31 struct ef4_nic *efx = mtd->priv;
32 int rc;
33
34 rc = efx->type->mtd_sync(mtd);
35 if (rc)
36 pr_err("%s: %s sync failed (%d)\n",
37 part->name, part->dev_type_name, rc);
38}
39
40static void ef4_mtd_remove_partition(struct ef4_mtd_partition *part)
41{
42 int rc;
43
44 for (;;) {
45 rc = mtd_device_unregister(&part->mtd);
46 if (rc != -EBUSY)
47 break;
48 ssleep(1);
49 }
50 WARN_ON(rc);
51 list_del(&part->node);
52}
53
54int ef4_mtd_add(struct ef4_nic *efx, struct ef4_mtd_partition *parts,
55 size_t n_parts, size_t sizeof_part)
56{
57 struct ef4_mtd_partition *part;
58 size_t i;
59
60 for (i = 0; i < n_parts; i++) {
61 part = (struct ef4_mtd_partition *)((char *)parts +
62 i * sizeof_part);
63
64 part->mtd.writesize = 1;
65
66 part->mtd.owner = THIS_MODULE;
67 part->mtd.priv = efx;
68 part->mtd.name = part->name;
69 part->mtd._erase = ef4_mtd_erase;
70 part->mtd._read = efx->type->mtd_read;
71 part->mtd._write = efx->type->mtd_write;
72 part->mtd._sync = ef4_mtd_sync;
73
74 efx->type->mtd_rename(part);
75
76 if (mtd_device_register(&part->mtd, NULL, 0))
77 goto fail;
78
79 /* Add to list in order - ef4_mtd_remove() depends on this */
80 list_add_tail(&part->node, &efx->mtd_list);
81 }
82
83 return 0;
84
85fail:
86 while (i--) {
87 part = (struct ef4_mtd_partition *)((char *)parts +
88 i * sizeof_part);
89 ef4_mtd_remove_partition(part);
90 }
91 /* Failure is unlikely here, but probably means we're out of memory */
92 return -ENOMEM;
93}
94
95void ef4_mtd_remove(struct ef4_nic *efx)
96{
97 struct ef4_mtd_partition *parts, *part, *next;
98
99 WARN_ON(ef4_dev_registered(efx));
100
101 if (list_empty(&efx->mtd_list))
102 return;
103
104 parts = list_first_entry(&efx->mtd_list, struct ef4_mtd_partition,
105 node);
106
107 list_for_each_entry_safe(part, next, &efx->mtd_list, node)
108 ef4_mtd_remove_partition(part);
109
110 kfree(parts);
111}
112
113void ef4_mtd_rename(struct ef4_nic *efx)
114{
115 struct ef4_mtd_partition *part;
116
117 ASSERT_RTNL();
118
119 list_for_each_entry(part, &efx->mtd_list, node)
120 efx->type->mtd_rename(part);
121}
1/****************************************************************************
2 * Driver for Solarflare network controllers and boards
3 * Copyright 2005-2006 Fen Systems Ltd.
4 * Copyright 2006-2013 Solarflare Communications Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation, incorporated herein by reference.
9 */
10
11#include <linux/module.h>
12#include <linux/mtd/mtd.h>
13#include <linux/slab.h>
14#include <linux/rtnetlink.h>
15
16#include "net_driver.h"
17#include "efx.h"
18
19#define to_ef4_mtd_partition(mtd) \
20 container_of(mtd, struct ef4_mtd_partition, mtd)
21
22/* MTD interface */
23
24static int ef4_mtd_erase(struct mtd_info *mtd, struct erase_info *erase)
25{
26 struct ef4_nic *efx = mtd->priv;
27
28 return efx->type->mtd_erase(mtd, erase->addr, erase->len);
29}
30
31static void ef4_mtd_sync(struct mtd_info *mtd)
32{
33 struct ef4_mtd_partition *part = to_ef4_mtd_partition(mtd);
34 struct ef4_nic *efx = mtd->priv;
35 int rc;
36
37 rc = efx->type->mtd_sync(mtd);
38 if (rc)
39 pr_err("%s: %s sync failed (%d)\n",
40 part->name, part->dev_type_name, rc);
41}
42
43static void ef4_mtd_remove_partition(struct ef4_mtd_partition *part)
44{
45 int rc;
46
47 for (;;) {
48 rc = mtd_device_unregister(&part->mtd);
49 if (rc != -EBUSY)
50 break;
51 ssleep(1);
52 }
53 WARN_ON(rc);
54 list_del(&part->node);
55}
56
57int ef4_mtd_add(struct ef4_nic *efx, struct ef4_mtd_partition *parts,
58 size_t n_parts, size_t sizeof_part)
59{
60 struct ef4_mtd_partition *part;
61 size_t i;
62
63 for (i = 0; i < n_parts; i++) {
64 part = (struct ef4_mtd_partition *)((char *)parts +
65 i * sizeof_part);
66
67 part->mtd.writesize = 1;
68
69 part->mtd.owner = THIS_MODULE;
70 part->mtd.priv = efx;
71 part->mtd.name = part->name;
72 part->mtd._erase = ef4_mtd_erase;
73 part->mtd._read = efx->type->mtd_read;
74 part->mtd._write = efx->type->mtd_write;
75 part->mtd._sync = ef4_mtd_sync;
76
77 efx->type->mtd_rename(part);
78
79 if (mtd_device_register(&part->mtd, NULL, 0))
80 goto fail;
81
82 /* Add to list in order - ef4_mtd_remove() depends on this */
83 list_add_tail(&part->node, &efx->mtd_list);
84 }
85
86 return 0;
87
88fail:
89 while (i--) {
90 part = (struct ef4_mtd_partition *)((char *)parts +
91 i * sizeof_part);
92 ef4_mtd_remove_partition(part);
93 }
94 /* Failure is unlikely here, but probably means we're out of memory */
95 return -ENOMEM;
96}
97
98void ef4_mtd_remove(struct ef4_nic *efx)
99{
100 struct ef4_mtd_partition *parts, *part, *next;
101
102 WARN_ON(ef4_dev_registered(efx));
103
104 if (list_empty(&efx->mtd_list))
105 return;
106
107 parts = list_first_entry(&efx->mtd_list, struct ef4_mtd_partition,
108 node);
109
110 list_for_each_entry_safe(part, next, &efx->mtd_list, node)
111 ef4_mtd_remove_partition(part);
112
113 kfree(parts);
114}
115
116void ef4_mtd_rename(struct ef4_nic *efx)
117{
118 struct ef4_mtd_partition *part;
119
120 ASSERT_RTNL();
121
122 list_for_each_entry(part, &efx->mtd_list, node)
123 efx->type->mtd_rename(part);
124}