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
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
|
/*
* PS3 Storage Library
*
* Copyright (C) 2007 Sony Computer Entertainment Inc.
* Copyright 2007 Sony Corp.
*
* 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; version 2 of the License.
*
* 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.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <linux/dma-mapping.h>
#include <asm/lv1call.h>
#include <asm/ps3stor.h>
static int ps3stor_probe_access(struct ps3_storage_device *dev)
{
int res, error;
unsigned int i;
unsigned long n;
if (dev->sbd.match_id == PS3_MATCH_ID_STOR_ROM) {
/* special case: CD-ROM is assumed always accessible */
dev->accessible_regions = 1;
return 0;
}
error = -EPERM;
for (i = 0; i < dev->num_regions; i++) {
dev_dbg(&dev->sbd.core,
"%s:%u: checking accessibility of region %u\n",
__func__, __LINE__, i);
dev->region_idx = i;
res = ps3stor_read_write_sectors(dev, dev->bounce_lpar, 0, 1,
0);
if (res) {
dev_dbg(&dev->sbd.core, "%s:%u: read failed, "
"region %u is not accessible\n", __func__,
__LINE__, i);
continue;
}
dev_dbg(&dev->sbd.core, "%s:%u: region %u is accessible\n",
__func__, __LINE__, i);
set_bit(i, &dev->accessible_regions);
/* We can access at least one region */
error = 0;
}
if (error)
return error;
n = hweight_long(dev->accessible_regions);
if (n > 1)
dev_info(&dev->sbd.core,
"%s:%u: %lu accessible regions found. Only the first "
"one will be used\n",
__func__, __LINE__, n);
dev->region_idx = __ffs(dev->accessible_regions);
dev_info(&dev->sbd.core,
"First accessible region has index %u start %lu size %lu\n",
dev->region_idx, dev->regions[dev->region_idx].start,
dev->regions[dev->region_idx].size);
return 0;
}
/**
* ps3stor_setup - Setup a storage device before use
* @dev: Pointer to a struct ps3_storage_device
* @handler: Pointer to an interrupt handler
*
* Returns 0 for success, or an error code
*/
int ps3stor_setup(struct ps3_storage_device *dev, irq_handler_t handler)
{
int error, res, alignment;
enum ps3_dma_page_size page_size;
error = ps3_open_hv_device(&dev->sbd);
if (error) {
dev_err(&dev->sbd.core,
"%s:%u: ps3_open_hv_device failed %d\n", __func__,
__LINE__, error);
goto fail;
}
error = ps3_sb_event_receive_port_setup(&dev->sbd, PS3_BINDING_CPU_ANY,
&dev->irq);
if (error) {
dev_err(&dev->sbd.core,
"%s:%u: ps3_sb_event_receive_port_setup failed %d\n",
__func__, __LINE__, error);
goto fail_close_device;
}
error = request_irq(dev->irq, handler, IRQF_DISABLED,
dev->sbd.core.driver->name, dev);
if (error) {
dev_err(&dev->sbd.core, "%s:%u: request_irq failed %d\n",
__func__, __LINE__, error);
goto fail_sb_event_receive_port_destroy;
}
alignment = min(__ffs(dev->bounce_size),
__ffs((unsigned long)dev->bounce_buf));
if (alignment < 12) {
dev_err(&dev->sbd.core,
"%s:%u: bounce buffer not aligned (%lx at 0x%p)\n",
__func__, __LINE__, dev->bounce_size, dev->bounce_buf);
error = -EINVAL;
goto fail_free_irq;
} else if (alignment < 16)
page_size = PS3_DMA_4K;
else
page_size = PS3_DMA_64K;
dev->sbd.d_region = &dev->dma_region;
ps3_dma_region_init(&dev->sbd, &dev->dma_region, page_size,
PS3_DMA_OTHER, dev->bounce_buf, dev->bounce_size);
res = ps3_dma_region_create(&dev->dma_region);
if (res) {
dev_err(&dev->sbd.core, "%s:%u: cannot create DMA region\n",
__func__, __LINE__);
error = -ENOMEM;
goto fail_free_irq;
}
dev->bounce_lpar = ps3_mm_phys_to_lpar(__pa(dev->bounce_buf));
dev->bounce_dma = dma_map_single(&dev->sbd.core, dev->bounce_buf,
dev->bounce_size, DMA_BIDIRECTIONAL);
if (!dev->bounce_dma) {
dev_err(&dev->sbd.core, "%s:%u: map DMA region failed\n",
__func__, __LINE__);
error = -ENODEV;
goto fail_free_dma;
}
error = ps3stor_probe_access(dev);
if (error) {
dev_err(&dev->sbd.core, "%s:%u: No accessible regions found\n",
__func__, __LINE__);
goto fail_unmap_dma;
}
return 0;
fail_unmap_dma:
dma_unmap_single(&dev->sbd.core, dev->bounce_dma, dev->bounce_size,
DMA_BIDIRECTIONAL);
fail_free_dma:
ps3_dma_region_free(&dev->dma_region);
fail_free_irq:
free_irq(dev->irq, dev);
fail_sb_event_receive_port_destroy:
ps3_sb_event_receive_port_destroy(&dev->sbd, dev->irq);
fail_close_device:
ps3_close_hv_device(&dev->sbd);
fail:
return error;
}
EXPORT_SYMBOL_GPL(ps3stor_setup);
/**
* ps3stor_teardown - Tear down a storage device after use
* @dev: Pointer to a struct ps3_storage_device
*/
void ps3stor_teardown(struct ps3_storage_device *dev)
{
int error;
dma_unmap_single(&dev->sbd.core, dev->bounce_dma, dev->bounce_size,
DMA_BIDIRECTIONAL);
ps3_dma_region_free(&dev->dma_region);
free_irq(dev->irq, dev);
error = ps3_sb_event_receive_port_destroy(&dev->sbd, dev->irq);
if (error)
dev_err(&dev->sbd.core,
"%s:%u: destroy event receive port failed %d\n",
__func__, __LINE__, error);
error = ps3_close_hv_device(&dev->sbd);
if (error)
dev_err(&dev->sbd.core,
"%s:%u: ps3_close_hv_device failed %d\n", __func__,
__LINE__, error);
}
EXPORT_SYMBOL_GPL(ps3stor_teardown);
/**
* ps3stor_read_write_sectors - read/write from/to a storage device
* @dev: Pointer to a struct ps3_storage_device
* @lpar: HV logical partition address
* @start_sector: First sector to read/write
* @sectors: Number of sectors to read/write
* @write: Flag indicating write (non-zero) or read (zero)
*
* Returns 0 for success, -1 in case of failure to submit the command, or
* an LV1 status value in case of other errors
*/
u64 ps3stor_read_write_sectors(struct ps3_storage_device *dev, u64 lpar,
u64 start_sector, u64 sectors, int write)
{
unsigned int region_id = dev->regions[dev->region_idx].id;
const char *op = write ? "write" : "read";
int res;
dev_dbg(&dev->sbd.core, "%s:%u: %s %lu sectors starting at %lu\n",
__func__, __LINE__, op, sectors, start_sector);
init_completion(&dev->done);
res = write ? lv1_storage_write(dev->sbd.dev_id, region_id,
start_sector, sectors, 0, lpar,
&dev->tag)
: lv1_storage_read(dev->sbd.dev_id, region_id,
start_sector, sectors, 0, lpar,
&dev->tag);
if (res) {
dev_dbg(&dev->sbd.core, "%s:%u: %s failed %d\n", __func__,
__LINE__, op, res);
return -1;
}
wait_for_completion(&dev->done);
if (dev->lv1_status) {
dev_dbg(&dev->sbd.core, "%s:%u: %s failed 0x%lx\n", __func__,
__LINE__, op, dev->lv1_status);
return dev->lv1_status;
}
dev_dbg(&dev->sbd.core, "%s:%u: %s completed\n", __func__, __LINE__,
op);
return 0;
}
EXPORT_SYMBOL_GPL(ps3stor_read_write_sectors);
/**
* ps3stor_send_command - send a device command to a storage device
* @dev: Pointer to a struct ps3_storage_device
* @cmd: Command number
* @arg1: First command argument
* @arg2: Second command argument
* @arg3: Third command argument
* @arg4: Fourth command argument
*
* Returns 0 for success, -1 in case of failure to submit the command, or
* an LV1 status value in case of other errors
*/
u64 ps3stor_send_command(struct ps3_storage_device *dev, u64 cmd, u64 arg1,
u64 arg2, u64 arg3, u64 arg4)
{
int res;
dev_dbg(&dev->sbd.core, "%s:%u: send device command 0x%lx\n", __func__,
__LINE__, cmd);
init_completion(&dev->done);
res = lv1_storage_send_device_command(dev->sbd.dev_id, cmd, arg1,
arg2, arg3, arg4, &dev->tag);
if (res) {
dev_err(&dev->sbd.core,
"%s:%u: send_device_command 0x%lx failed %d\n",
__func__, __LINE__, cmd, res);
return -1;
}
wait_for_completion(&dev->done);
if (dev->lv1_status) {
dev_dbg(&dev->sbd.core, "%s:%u: command 0x%lx failed 0x%lx\n",
__func__, __LINE__, cmd, dev->lv1_status);
return dev->lv1_status;
}
dev_dbg(&dev->sbd.core, "%s:%u: command 0x%lx completed\n", __func__,
__LINE__, cmd);
return 0;
}
EXPORT_SYMBOL_GPL(ps3stor_send_command);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("PS3 Storage Bus Library");
MODULE_AUTHOR("Sony Corporation");
|
