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_efx_mtd_partition(mtd) \
20 container_of(mtd, struct efx_mtd_partition, mtd)
21
22 /* MTD interface */
23
efx_mtd_erase(struct mtd_info * mtd,struct erase_info * erase)24 static int efx_mtd_erase(struct mtd_info *mtd, struct erase_info *erase)
25 {
26 struct efx_nic *efx = mtd->priv;
27 int rc;
28
29 rc = efx->type->mtd_erase(mtd, erase->addr, erase->len);
30 if (rc == 0) {
31 erase->state = MTD_ERASE_DONE;
32 } else {
33 erase->state = MTD_ERASE_FAILED;
34 erase->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
35 }
36 mtd_erase_callback(erase);
37 return rc;
38 }
39
efx_mtd_sync(struct mtd_info * mtd)40 static void efx_mtd_sync(struct mtd_info *mtd)
41 {
42 struct efx_mtd_partition *part = to_efx_mtd_partition(mtd);
43 struct efx_nic *efx = mtd->priv;
44 int rc;
45
46 rc = efx->type->mtd_sync(mtd);
47 if (rc)
48 pr_err("%s: %s sync failed (%d)\n",
49 part->name, part->dev_type_name, rc);
50 }
51
efx_mtd_remove_partition(struct efx_mtd_partition * part)52 static void efx_mtd_remove_partition(struct efx_mtd_partition *part)
53 {
54 int rc;
55
56 for (;;) {
57 rc = mtd_device_unregister(&part->mtd);
58 if (rc != -EBUSY)
59 break;
60 ssleep(1);
61 }
62 WARN_ON(rc);
63 list_del(&part->node);
64 }
65
efx_mtd_add(struct efx_nic * efx,struct efx_mtd_partition * parts,size_t n_parts,size_t sizeof_part)66 int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
67 size_t n_parts, size_t sizeof_part)
68 {
69 struct efx_mtd_partition *part;
70 size_t i;
71
72 for (i = 0; i < n_parts; i++) {
73 part = (struct efx_mtd_partition *)((char *)parts +
74 i * sizeof_part);
75
76 part->mtd.writesize = 1;
77
78 part->mtd.owner = THIS_MODULE;
79 part->mtd.priv = efx;
80 part->mtd.name = part->name;
81 part->mtd._erase = efx_mtd_erase;
82 part->mtd._read = efx->type->mtd_read;
83 part->mtd._write = efx->type->mtd_write;
84 part->mtd._sync = efx_mtd_sync;
85
86 efx->type->mtd_rename(part);
87
88 if (mtd_device_register(&part->mtd, NULL, 0))
89 goto fail;
90
91 /* Add to list in order - efx_mtd_remove() depends on this */
92 list_add_tail(&part->node, &efx->mtd_list);
93 }
94
95 return 0;
96
97 fail:
98 while (i--) {
99 part = (struct efx_mtd_partition *)((char *)parts +
100 i * sizeof_part);
101 efx_mtd_remove_partition(part);
102 }
103 /* Failure is unlikely here, but probably means we're out of memory */
104 return -ENOMEM;
105 }
106
efx_mtd_remove(struct efx_nic * efx)107 void efx_mtd_remove(struct efx_nic *efx)
108 {
109 struct efx_mtd_partition *parts, *part, *next;
110
111 WARN_ON(efx_dev_registered(efx));
112
113 if (list_empty(&efx->mtd_list))
114 return;
115
116 parts = list_first_entry(&efx->mtd_list, struct efx_mtd_partition,
117 node);
118
119 list_for_each_entry_safe(part, next, &efx->mtd_list, node)
120 efx_mtd_remove_partition(part);
121
122 kfree(parts);
123 }
124
efx_mtd_rename(struct efx_nic * efx)125 void efx_mtd_rename(struct efx_nic *efx)
126 {
127 struct efx_mtd_partition *part;
128
129 ASSERT_RTNL();
130
131 list_for_each_entry(part, &efx->mtd_list, node)
132 efx->type->mtd_rename(part);
133 }
134