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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
|
/* Copyright 2013-2015 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <libflash/libffs.h>
#include <common/arch_flash.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/ioctl.h>
#include <mtd/mtd-user.h>
#include "pnor.h"
#include "opal-prd.h"
#define FDT_FLASH_PATH "/proc/device-tree/chosen/ibm,system-flash"
bool pnor_available(struct pnor *pnor)
{
/* --pnor is specified */
if (pnor->path) {
if (access(pnor->path, R_OK | W_OK) == 0)
return true;
pr_log(LOG_ERR, "PNOR: Does not have permission to read pnor: %m");
return false;
}
if (access(FDT_FLASH_PATH, R_OK) == 0)
return true;
return false;
}
int pnor_init(struct pnor *pnor)
{
int rc;
if (!pnor)
return -1;
rc = arch_flash_init(&(pnor->bl), pnor->path, false);
if (rc) {
pr_log(LOG_ERR, "PNOR: Flash init failed");
return -1;
}
rc = blocklevel_get_info(pnor->bl, NULL, &(pnor->size), &(pnor->erasesize));
if (rc) {
pr_log(LOG_ERR, "PNOR: blocklevel_get_info() failed. Can't use PNOR");
goto out;
}
rc = ffs_init(0, pnor->size, pnor->bl, &pnor->ffsh, 0);
if (rc) {
pr_log(LOG_ERR, "PNOR: Failed to open pnor partition table");
goto out;
}
return 0;
out:
arch_flash_close(pnor->bl, pnor->path);
pnor->bl = NULL;
return -1;
}
void pnor_close(struct pnor *pnor)
{
if (!pnor)
return;
if (pnor->ffsh)
ffs_close(pnor->ffsh);
if (pnor->bl)
arch_flash_close(pnor->bl, pnor->path);
if (pnor->path)
free(pnor->path);
}
void dump_parts(struct ffs_handle *ffs) {
int i, rc;
uint32_t start, size, act_size;
char *name;
pr_debug("PNOR: %10s %8s %8s %8s",
"name", "start", "size", "act_size");
for (i = 0; ; i++) {
rc = ffs_part_info(ffs, i, &name, &start,
&size, &act_size, NULL);
if (rc)
break;
pr_debug("PNOR: %10s %08x %08x %08x",
name, start, size, act_size);
free(name);
}
}
static int mtd_write(struct pnor *pnor, void *data, uint64_t offset,
size_t len)
{
int rc;
if (len > pnor->size || offset > pnor->size ||
len + offset > pnor->size)
return -ERANGE;
rc = blocklevel_smart_write(pnor->bl, offset, data, len);
if (rc)
return -errno;
return len;
}
static int mtd_read(struct pnor *pnor, void *data, uint64_t offset,
size_t len)
{
int rc;
if (len > pnor->size || offset > pnor->size ||
len + offset > pnor->size)
return -ERANGE;
rc = blocklevel_read(pnor->bl, offset, data, len);
if (rc)
return -errno;
return len;
}
/* Similar to read(2), this performs partial operations where the number of
* bytes read/written may be less than size.
*
* Returns number of bytes written, or a negative value on failure. */
int pnor_operation(struct pnor *pnor, const char *name, uint64_t offset,
void *data, size_t requested_size, enum pnor_op op)
{
int rc;
uint32_t pstart, psize, idx;
int size;
if (!pnor->ffsh) {
pr_log(LOG_ERR, "PNOR: ffs not initialised");
return -EBUSY;
}
rc = ffs_lookup_part(pnor->ffsh, name, &idx);
if (rc) {
pr_log(LOG_WARNING, "PNOR: no partiton named '%s'", name);
return -ENOENT;
}
ffs_part_info(pnor->ffsh, idx, NULL, &pstart, &psize, NULL, NULL);
if (rc) {
pr_log(LOG_ERR, "PNOR: unable to fetch partition info for %s",
name);
return -ENOENT;
}
if (offset > psize) {
pr_log(LOG_WARNING, "PNOR: partition %s(size 0x%x) "
"offset (0x%lx) out of bounds",
name, psize, offset);
return -ERANGE;
}
/* Large requests are trimmed */
if (requested_size > psize)
size = psize;
else
size = requested_size;
if (size + offset > psize)
size = psize - offset;
if (size < 0) {
pr_log(LOG_WARNING, "PNOR: partition %s(size 0x%x) "
"read size (0x%zx) and offset (0x%lx) "
"out of bounds",
name, psize, requested_size, offset);
return -ERANGE;
}
switch (op) {
case PNOR_OP_READ:
rc = mtd_read(pnor, data, pstart + offset, size);
break;
case PNOR_OP_WRITE:
rc = mtd_write(pnor, data, pstart + offset, size);
break;
default:
rc = -EIO;
pr_log(LOG_ERR, "PNOR: Invalid operation");
goto out;
}
if (rc < 0)
pr_log(LOG_ERR, "PNOR: MTD operation failed");
else if (rc != size)
pr_log(LOG_WARNING, "PNOR: mtd operation "
"returned %d, expected %d",
rc, size);
out:
return rc;
}
|
