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1/*
2 * PS3 FLASH ROM Storage Driver
3 *
4 * Copyright (C) 2007 Sony Computer Entertainment Inc.
5 * Copyright 2007 Sony Corp.
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published
9 * by the Free Software Foundation; version 2 of the License.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 */
20
21#include <linux/fs.h>
22#include <linux/miscdevice.h>
23#include <linux/slab.h>
24#include <linux/uaccess.h>
25
26#include <asm/lv1call.h>
27#include <asm/ps3stor.h>
28
29
30#define DEVICE_NAME "ps3flash"
31
32#define FLASH_BLOCK_SIZE (256*1024)
33
34
35struct ps3flash_private {
36 struct mutex mutex; /* Bounce buffer mutex */
37 u64 chunk_sectors;
38 int tag; /* Start sector of buffer, -1 if invalid */
39 bool dirty;
40};
41
42static struct ps3_storage_device *ps3flash_dev;
43
44static int ps3flash_read_write_sectors(struct ps3_storage_device *dev,
45 u64 start_sector, int write)
46{
47 struct ps3flash_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
48 u64 res = ps3stor_read_write_sectors(dev, dev->bounce_lpar,
49 start_sector, priv->chunk_sectors,
50 write);
51 if (res) {
52 dev_err(&dev->sbd.core, "%s:%u: %s failed 0x%llx\n", __func__,
53 __LINE__, write ? "write" : "read", res);
54 return -EIO;
55 }
56 return 0;
57}
58
59static int ps3flash_writeback(struct ps3_storage_device *dev)
60{
61 struct ps3flash_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
62 int res;
63
64 if (!priv->dirty || priv->tag < 0)
65 return 0;
66
67 res = ps3flash_read_write_sectors(dev, priv->tag, 1);
68 if (res)
69 return res;
70
71 priv->dirty = false;
72 return 0;
73}
74
75static int ps3flash_fetch(struct ps3_storage_device *dev, u64 start_sector)
76{
77 struct ps3flash_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
78 int res;
79
80 if (start_sector == priv->tag)
81 return 0;
82
83 res = ps3flash_writeback(dev);
84 if (res)
85 return res;
86
87 priv->tag = -1;
88
89 res = ps3flash_read_write_sectors(dev, start_sector, 0);
90 if (res)
91 return res;
92
93 priv->tag = start_sector;
94 return 0;
95}
96
97static loff_t ps3flash_llseek(struct file *file, loff_t offset, int origin)
98{
99 struct ps3_storage_device *dev = ps3flash_dev;
100 loff_t res;
101
102 mutex_lock(&file->f_mapping->host->i_mutex);
103 switch (origin) {
104 case 0:
105 break;
106 case 1:
107 offset += file->f_pos;
108 break;
109 case 2:
110 offset += dev->regions[dev->region_idx].size*dev->blk_size;
111 break;
112 default:
113 offset = -1;
114 }
115 if (offset < 0) {
116 res = -EINVAL;
117 goto out;
118 }
119
120 file->f_pos = offset;
121 res = file->f_pos;
122
123out:
124 mutex_unlock(&file->f_mapping->host->i_mutex);
125 return res;
126}
127
128static ssize_t ps3flash_read(char __user *userbuf, void *kernelbuf,
129 size_t count, loff_t *pos)
130{
131 struct ps3_storage_device *dev = ps3flash_dev;
132 struct ps3flash_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
133 u64 size, sector, offset;
134 int res;
135 size_t remaining, n;
136 const void *src;
137
138 dev_dbg(&dev->sbd.core,
139 "%s:%u: Reading %zu bytes at position %lld to U0x%p/K0x%p\n",
140 __func__, __LINE__, count, *pos, userbuf, kernelbuf);
141
142 size = dev->regions[dev->region_idx].size*dev->blk_size;
143 if (*pos >= size || !count)
144 return 0;
145
146 if (*pos + count > size) {
147 dev_dbg(&dev->sbd.core,
148 "%s:%u Truncating count from %zu to %llu\n", __func__,
149 __LINE__, count, size - *pos);
150 count = size - *pos;
151 }
152
153 sector = *pos / dev->bounce_size * priv->chunk_sectors;
154 offset = *pos % dev->bounce_size;
155
156 remaining = count;
157 do {
158 n = min_t(u64, remaining, dev->bounce_size - offset);
159 src = dev->bounce_buf + offset;
160
161 mutex_lock(&priv->mutex);
162
163 res = ps3flash_fetch(dev, sector);
164 if (res)
165 goto fail;
166
167 dev_dbg(&dev->sbd.core,
168 "%s:%u: copy %lu bytes from 0x%p to U0x%p/K0x%p\n",
169 __func__, __LINE__, n, src, userbuf, kernelbuf);
170 if (userbuf) {
171 if (copy_to_user(userbuf, src, n)) {
172 res = -EFAULT;
173 goto fail;
174 }
175 userbuf += n;
176 }
177 if (kernelbuf) {
178 memcpy(kernelbuf, src, n);
179 kernelbuf += n;
180 }
181
182 mutex_unlock(&priv->mutex);
183
184 *pos += n;
185 remaining -= n;
186 sector += priv->chunk_sectors;
187 offset = 0;
188 } while (remaining > 0);
189
190 return count;
191
192fail:
193 mutex_unlock(&priv->mutex);
194 return res;
195}
196
197static ssize_t ps3flash_write(const char __user *userbuf,
198 const void *kernelbuf, size_t count, loff_t *pos)
199{
200 struct ps3_storage_device *dev = ps3flash_dev;
201 struct ps3flash_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
202 u64 size, sector, offset;
203 int res = 0;
204 size_t remaining, n;
205 void *dst;
206
207 dev_dbg(&dev->sbd.core,
208 "%s:%u: Writing %zu bytes at position %lld from U0x%p/K0x%p\n",
209 __func__, __LINE__, count, *pos, userbuf, kernelbuf);
210
211 size = dev->regions[dev->region_idx].size*dev->blk_size;
212 if (*pos >= size || !count)
213 return 0;
214
215 if (*pos + count > size) {
216 dev_dbg(&dev->sbd.core,
217 "%s:%u Truncating count from %zu to %llu\n", __func__,
218 __LINE__, count, size - *pos);
219 count = size - *pos;
220 }
221
222 sector = *pos / dev->bounce_size * priv->chunk_sectors;
223 offset = *pos % dev->bounce_size;
224
225 remaining = count;
226 do {
227 n = min_t(u64, remaining, dev->bounce_size - offset);
228 dst = dev->bounce_buf + offset;
229
230 mutex_lock(&priv->mutex);
231
232 if (n != dev->bounce_size)
233 res = ps3flash_fetch(dev, sector);
234 else if (sector != priv->tag)
235 res = ps3flash_writeback(dev);
236 if (res)
237 goto fail;
238
239 dev_dbg(&dev->sbd.core,
240 "%s:%u: copy %lu bytes from U0x%p/K0x%p to 0x%p\n",
241 __func__, __LINE__, n, userbuf, kernelbuf, dst);
242 if (userbuf) {
243 if (copy_from_user(dst, userbuf, n)) {
244 res = -EFAULT;
245 goto fail;
246 }
247 userbuf += n;
248 }
249 if (kernelbuf) {
250 memcpy(dst, kernelbuf, n);
251 kernelbuf += n;
252 }
253
254 priv->tag = sector;
255 priv->dirty = true;
256
257 mutex_unlock(&priv->mutex);
258
259 *pos += n;
260 remaining -= n;
261 sector += priv->chunk_sectors;
262 offset = 0;
263 } while (remaining > 0);
264
265 return count;
266
267fail:
268 mutex_unlock(&priv->mutex);
269 return res;
270}
271
272static ssize_t ps3flash_user_read(struct file *file, char __user *buf,
273 size_t count, loff_t *pos)
274{
275 return ps3flash_read(buf, NULL, count, pos);
276}
277
278static ssize_t ps3flash_user_write(struct file *file, const char __user *buf,
279 size_t count, loff_t *pos)
280{
281 return ps3flash_write(buf, NULL, count, pos);
282}
283
284static ssize_t ps3flash_kernel_read(void *buf, size_t count, loff_t pos)
285{
286 return ps3flash_read(NULL, buf, count, &pos);
287}
288
289static ssize_t ps3flash_kernel_write(const void *buf, size_t count,
290 loff_t pos)
291{
292 ssize_t res;
293 int wb;
294
295 res = ps3flash_write(NULL, buf, count, &pos);
296 if (res < 0)
297 return res;
298
299 /* Make kernel writes synchronous */
300 wb = ps3flash_writeback(ps3flash_dev);
301 if (wb)
302 return wb;
303
304 return res;
305}
306
307static int ps3flash_flush(struct file *file, fl_owner_t id)
308{
309 return ps3flash_writeback(ps3flash_dev);
310}
311
312static int ps3flash_fsync(struct file *file, loff_t start, loff_t end, int datasync)
313{
314 struct inode *inode = file->f_path.dentry->d_inode;
315 int err;
316 mutex_lock(&inode->i_mutex);
317 err = ps3flash_writeback(ps3flash_dev);
318 mutex_unlock(&inode->i_mutex);
319 return err;
320}
321
322static irqreturn_t ps3flash_interrupt(int irq, void *data)
323{
324 struct ps3_storage_device *dev = data;
325 int res;
326 u64 tag, status;
327
328 res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status);
329
330 if (tag != dev->tag)
331 dev_err(&dev->sbd.core,
332 "%s:%u: tag mismatch, got %llx, expected %llx\n",
333 __func__, __LINE__, tag, dev->tag);
334
335 if (res) {
336 dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%llx\n",
337 __func__, __LINE__, res, status);
338 } else {
339 dev->lv1_status = status;
340 complete(&dev->done);
341 }
342 return IRQ_HANDLED;
343}
344
345static const struct file_operations ps3flash_fops = {
346 .owner = THIS_MODULE,
347 .llseek = ps3flash_llseek,
348 .read = ps3flash_user_read,
349 .write = ps3flash_user_write,
350 .flush = ps3flash_flush,
351 .fsync = ps3flash_fsync,
352};
353
354static const struct ps3_os_area_flash_ops ps3flash_kernel_ops = {
355 .read = ps3flash_kernel_read,
356 .write = ps3flash_kernel_write,
357};
358
359static struct miscdevice ps3flash_misc = {
360 .minor = MISC_DYNAMIC_MINOR,
361 .name = DEVICE_NAME,
362 .fops = &ps3flash_fops,
363};
364
365static int __devinit ps3flash_probe(struct ps3_system_bus_device *_dev)
366{
367 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
368 struct ps3flash_private *priv;
369 int error;
370 unsigned long tmp;
371
372 tmp = dev->regions[dev->region_idx].start*dev->blk_size;
373 if (tmp % FLASH_BLOCK_SIZE) {
374 dev_err(&dev->sbd.core,
375 "%s:%u region start %lu is not aligned\n", __func__,
376 __LINE__, tmp);
377 return -EINVAL;
378 }
379 tmp = dev->regions[dev->region_idx].size*dev->blk_size;
380 if (tmp % FLASH_BLOCK_SIZE) {
381 dev_err(&dev->sbd.core,
382 "%s:%u region size %lu is not aligned\n", __func__,
383 __LINE__, tmp);
384 return -EINVAL;
385 }
386
387 /* use static buffer, kmalloc cannot allocate 256 KiB */
388 if (!ps3flash_bounce_buffer.address)
389 return -ENODEV;
390
391 if (ps3flash_dev) {
392 dev_err(&dev->sbd.core,
393 "Only one FLASH device is supported\n");
394 return -EBUSY;
395 }
396
397 ps3flash_dev = dev;
398
399 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
400 if (!priv) {
401 error = -ENOMEM;
402 goto fail;
403 }
404
405 ps3_system_bus_set_drvdata(&dev->sbd, priv);
406 mutex_init(&priv->mutex);
407 priv->tag = -1;
408
409 dev->bounce_size = ps3flash_bounce_buffer.size;
410 dev->bounce_buf = ps3flash_bounce_buffer.address;
411 priv->chunk_sectors = dev->bounce_size / dev->blk_size;
412
413 error = ps3stor_setup(dev, ps3flash_interrupt);
414 if (error)
415 goto fail_free_priv;
416
417 ps3flash_misc.parent = &dev->sbd.core;
418 error = misc_register(&ps3flash_misc);
419 if (error) {
420 dev_err(&dev->sbd.core, "%s:%u: misc_register failed %d\n",
421 __func__, __LINE__, error);
422 goto fail_teardown;
423 }
424
425 dev_info(&dev->sbd.core, "%s:%u: registered misc device %d\n",
426 __func__, __LINE__, ps3flash_misc.minor);
427
428 ps3_os_area_flash_register(&ps3flash_kernel_ops);
429 return 0;
430
431fail_teardown:
432 ps3stor_teardown(dev);
433fail_free_priv:
434 kfree(priv);
435 ps3_system_bus_set_drvdata(&dev->sbd, NULL);
436fail:
437 ps3flash_dev = NULL;
438 return error;
439}
440
441static int ps3flash_remove(struct ps3_system_bus_device *_dev)
442{
443 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
444
445 ps3_os_area_flash_register(NULL);
446 misc_deregister(&ps3flash_misc);
447 ps3stor_teardown(dev);
448 kfree(ps3_system_bus_get_drvdata(&dev->sbd));
449 ps3_system_bus_set_drvdata(&dev->sbd, NULL);
450 ps3flash_dev = NULL;
451 return 0;
452}
453
454
455static struct ps3_system_bus_driver ps3flash = {
456 .match_id = PS3_MATCH_ID_STOR_FLASH,
457 .core.name = DEVICE_NAME,
458 .core.owner = THIS_MODULE,
459 .probe = ps3flash_probe,
460 .remove = ps3flash_remove,
461 .shutdown = ps3flash_remove,
462};
463
464
465static int __init ps3flash_init(void)
466{
467 return ps3_system_bus_driver_register(&ps3flash);
468}
469
470static void __exit ps3flash_exit(void)
471{
472 ps3_system_bus_driver_unregister(&ps3flash);
473}
474
475module_init(ps3flash_init);
476module_exit(ps3flash_exit);
477
478MODULE_LICENSE("GPL");
479MODULE_DESCRIPTION("PS3 FLASH ROM Storage Driver");
480MODULE_AUTHOR("Sony Corporation");
481MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_FLASH);
1/*
2 * PS3 FLASH ROM Storage Driver
3 *
4 * Copyright (C) 2007 Sony Computer Entertainment Inc.
5 * Copyright 2007 Sony Corp.
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published
9 * by the Free Software Foundation; version 2 of the License.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 */
20
21#include <linux/fs.h>
22#include <linux/miscdevice.h>
23#include <linux/slab.h>
24#include <linux/uaccess.h>
25#include <linux/module.h>
26
27#include <asm/lv1call.h>
28#include <asm/ps3stor.h>
29
30
31#define DEVICE_NAME "ps3flash"
32
33#define FLASH_BLOCK_SIZE (256*1024)
34
35
36struct ps3flash_private {
37 struct mutex mutex; /* Bounce buffer mutex */
38 u64 chunk_sectors;
39 int tag; /* Start sector of buffer, -1 if invalid */
40 bool dirty;
41};
42
43static struct ps3_storage_device *ps3flash_dev;
44
45static int ps3flash_read_write_sectors(struct ps3_storage_device *dev,
46 u64 start_sector, int write)
47{
48 struct ps3flash_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
49 u64 res = ps3stor_read_write_sectors(dev, dev->bounce_lpar,
50 start_sector, priv->chunk_sectors,
51 write);
52 if (res) {
53 dev_err(&dev->sbd.core, "%s:%u: %s failed 0x%llx\n", __func__,
54 __LINE__, write ? "write" : "read", res);
55 return -EIO;
56 }
57 return 0;
58}
59
60static int ps3flash_writeback(struct ps3_storage_device *dev)
61{
62 struct ps3flash_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
63 int res;
64
65 if (!priv->dirty || priv->tag < 0)
66 return 0;
67
68 res = ps3flash_read_write_sectors(dev, priv->tag, 1);
69 if (res)
70 return res;
71
72 priv->dirty = false;
73 return 0;
74}
75
76static int ps3flash_fetch(struct ps3_storage_device *dev, u64 start_sector)
77{
78 struct ps3flash_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
79 int res;
80
81 if (start_sector == priv->tag)
82 return 0;
83
84 res = ps3flash_writeback(dev);
85 if (res)
86 return res;
87
88 priv->tag = -1;
89
90 res = ps3flash_read_write_sectors(dev, start_sector, 0);
91 if (res)
92 return res;
93
94 priv->tag = start_sector;
95 return 0;
96}
97
98static loff_t ps3flash_llseek(struct file *file, loff_t offset, int origin)
99{
100 struct ps3_storage_device *dev = ps3flash_dev;
101 return generic_file_llseek_size(file, offset, origin, MAX_LFS_FILESIZE,
102 dev->regions[dev->region_idx].size*dev->blk_size);
103}
104
105static ssize_t ps3flash_read(char __user *userbuf, void *kernelbuf,
106 size_t count, loff_t *pos)
107{
108 struct ps3_storage_device *dev = ps3flash_dev;
109 struct ps3flash_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
110 u64 size, sector, offset;
111 int res;
112 size_t remaining, n;
113 const void *src;
114
115 dev_dbg(&dev->sbd.core,
116 "%s:%u: Reading %zu bytes at position %lld to U0x%p/K0x%p\n",
117 __func__, __LINE__, count, *pos, userbuf, kernelbuf);
118
119 size = dev->regions[dev->region_idx].size*dev->blk_size;
120 if (*pos >= size || !count)
121 return 0;
122
123 if (*pos + count > size) {
124 dev_dbg(&dev->sbd.core,
125 "%s:%u Truncating count from %zu to %llu\n", __func__,
126 __LINE__, count, size - *pos);
127 count = size - *pos;
128 }
129
130 sector = *pos / dev->bounce_size * priv->chunk_sectors;
131 offset = *pos % dev->bounce_size;
132
133 remaining = count;
134 do {
135 n = min_t(u64, remaining, dev->bounce_size - offset);
136 src = dev->bounce_buf + offset;
137
138 mutex_lock(&priv->mutex);
139
140 res = ps3flash_fetch(dev, sector);
141 if (res)
142 goto fail;
143
144 dev_dbg(&dev->sbd.core,
145 "%s:%u: copy %lu bytes from 0x%p to U0x%p/K0x%p\n",
146 __func__, __LINE__, n, src, userbuf, kernelbuf);
147 if (userbuf) {
148 if (copy_to_user(userbuf, src, n)) {
149 res = -EFAULT;
150 goto fail;
151 }
152 userbuf += n;
153 }
154 if (kernelbuf) {
155 memcpy(kernelbuf, src, n);
156 kernelbuf += n;
157 }
158
159 mutex_unlock(&priv->mutex);
160
161 *pos += n;
162 remaining -= n;
163 sector += priv->chunk_sectors;
164 offset = 0;
165 } while (remaining > 0);
166
167 return count;
168
169fail:
170 mutex_unlock(&priv->mutex);
171 return res;
172}
173
174static ssize_t ps3flash_write(const char __user *userbuf,
175 const void *kernelbuf, size_t count, loff_t *pos)
176{
177 struct ps3_storage_device *dev = ps3flash_dev;
178 struct ps3flash_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
179 u64 size, sector, offset;
180 int res = 0;
181 size_t remaining, n;
182 void *dst;
183
184 dev_dbg(&dev->sbd.core,
185 "%s:%u: Writing %zu bytes at position %lld from U0x%p/K0x%p\n",
186 __func__, __LINE__, count, *pos, userbuf, kernelbuf);
187
188 size = dev->regions[dev->region_idx].size*dev->blk_size;
189 if (*pos >= size || !count)
190 return 0;
191
192 if (*pos + count > size) {
193 dev_dbg(&dev->sbd.core,
194 "%s:%u Truncating count from %zu to %llu\n", __func__,
195 __LINE__, count, size - *pos);
196 count = size - *pos;
197 }
198
199 sector = *pos / dev->bounce_size * priv->chunk_sectors;
200 offset = *pos % dev->bounce_size;
201
202 remaining = count;
203 do {
204 n = min_t(u64, remaining, dev->bounce_size - offset);
205 dst = dev->bounce_buf + offset;
206
207 mutex_lock(&priv->mutex);
208
209 if (n != dev->bounce_size)
210 res = ps3flash_fetch(dev, sector);
211 else if (sector != priv->tag)
212 res = ps3flash_writeback(dev);
213 if (res)
214 goto fail;
215
216 dev_dbg(&dev->sbd.core,
217 "%s:%u: copy %lu bytes from U0x%p/K0x%p to 0x%p\n",
218 __func__, __LINE__, n, userbuf, kernelbuf, dst);
219 if (userbuf) {
220 if (copy_from_user(dst, userbuf, n)) {
221 res = -EFAULT;
222 goto fail;
223 }
224 userbuf += n;
225 }
226 if (kernelbuf) {
227 memcpy(dst, kernelbuf, n);
228 kernelbuf += n;
229 }
230
231 priv->tag = sector;
232 priv->dirty = true;
233
234 mutex_unlock(&priv->mutex);
235
236 *pos += n;
237 remaining -= n;
238 sector += priv->chunk_sectors;
239 offset = 0;
240 } while (remaining > 0);
241
242 return count;
243
244fail:
245 mutex_unlock(&priv->mutex);
246 return res;
247}
248
249static ssize_t ps3flash_user_read(struct file *file, char __user *buf,
250 size_t count, loff_t *pos)
251{
252 return ps3flash_read(buf, NULL, count, pos);
253}
254
255static ssize_t ps3flash_user_write(struct file *file, const char __user *buf,
256 size_t count, loff_t *pos)
257{
258 return ps3flash_write(buf, NULL, count, pos);
259}
260
261static ssize_t ps3flash_kernel_read(void *buf, size_t count, loff_t pos)
262{
263 return ps3flash_read(NULL, buf, count, &pos);
264}
265
266static ssize_t ps3flash_kernel_write(const void *buf, size_t count,
267 loff_t pos)
268{
269 ssize_t res;
270 int wb;
271
272 res = ps3flash_write(NULL, buf, count, &pos);
273 if (res < 0)
274 return res;
275
276 /* Make kernel writes synchronous */
277 wb = ps3flash_writeback(ps3flash_dev);
278 if (wb)
279 return wb;
280
281 return res;
282}
283
284static int ps3flash_flush(struct file *file, fl_owner_t id)
285{
286 return ps3flash_writeback(ps3flash_dev);
287}
288
289static int ps3flash_fsync(struct file *file, loff_t start, loff_t end, int datasync)
290{
291 struct inode *inode = file_inode(file);
292 int err;
293 inode_lock(inode);
294 err = ps3flash_writeback(ps3flash_dev);
295 inode_unlock(inode);
296 return err;
297}
298
299static irqreturn_t ps3flash_interrupt(int irq, void *data)
300{
301 struct ps3_storage_device *dev = data;
302 int res;
303 u64 tag, status;
304
305 res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status);
306
307 if (tag != dev->tag)
308 dev_err(&dev->sbd.core,
309 "%s:%u: tag mismatch, got %llx, expected %llx\n",
310 __func__, __LINE__, tag, dev->tag);
311
312 if (res) {
313 dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%llx\n",
314 __func__, __LINE__, res, status);
315 } else {
316 dev->lv1_status = status;
317 complete(&dev->done);
318 }
319 return IRQ_HANDLED;
320}
321
322static const struct file_operations ps3flash_fops = {
323 .owner = THIS_MODULE,
324 .llseek = ps3flash_llseek,
325 .read = ps3flash_user_read,
326 .write = ps3flash_user_write,
327 .flush = ps3flash_flush,
328 .fsync = ps3flash_fsync,
329};
330
331static const struct ps3_os_area_flash_ops ps3flash_kernel_ops = {
332 .read = ps3flash_kernel_read,
333 .write = ps3flash_kernel_write,
334};
335
336static struct miscdevice ps3flash_misc = {
337 .minor = MISC_DYNAMIC_MINOR,
338 .name = DEVICE_NAME,
339 .fops = &ps3flash_fops,
340};
341
342static int ps3flash_probe(struct ps3_system_bus_device *_dev)
343{
344 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
345 struct ps3flash_private *priv;
346 int error;
347 unsigned long tmp;
348
349 tmp = dev->regions[dev->region_idx].start*dev->blk_size;
350 if (tmp % FLASH_BLOCK_SIZE) {
351 dev_err(&dev->sbd.core,
352 "%s:%u region start %lu is not aligned\n", __func__,
353 __LINE__, tmp);
354 return -EINVAL;
355 }
356 tmp = dev->regions[dev->region_idx].size*dev->blk_size;
357 if (tmp % FLASH_BLOCK_SIZE) {
358 dev_err(&dev->sbd.core,
359 "%s:%u region size %lu is not aligned\n", __func__,
360 __LINE__, tmp);
361 return -EINVAL;
362 }
363
364 /* use static buffer, kmalloc cannot allocate 256 KiB */
365 if (!ps3flash_bounce_buffer.address)
366 return -ENODEV;
367
368 if (ps3flash_dev) {
369 dev_err(&dev->sbd.core,
370 "Only one FLASH device is supported\n");
371 return -EBUSY;
372 }
373
374 ps3flash_dev = dev;
375
376 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
377 if (!priv) {
378 error = -ENOMEM;
379 goto fail;
380 }
381
382 ps3_system_bus_set_drvdata(&dev->sbd, priv);
383 mutex_init(&priv->mutex);
384 priv->tag = -1;
385
386 dev->bounce_size = ps3flash_bounce_buffer.size;
387 dev->bounce_buf = ps3flash_bounce_buffer.address;
388 priv->chunk_sectors = dev->bounce_size / dev->blk_size;
389
390 error = ps3stor_setup(dev, ps3flash_interrupt);
391 if (error)
392 goto fail_free_priv;
393
394 ps3flash_misc.parent = &dev->sbd.core;
395 error = misc_register(&ps3flash_misc);
396 if (error) {
397 dev_err(&dev->sbd.core, "%s:%u: misc_register failed %d\n",
398 __func__, __LINE__, error);
399 goto fail_teardown;
400 }
401
402 dev_info(&dev->sbd.core, "%s:%u: registered misc device %d\n",
403 __func__, __LINE__, ps3flash_misc.minor);
404
405 ps3_os_area_flash_register(&ps3flash_kernel_ops);
406 return 0;
407
408fail_teardown:
409 ps3stor_teardown(dev);
410fail_free_priv:
411 kfree(priv);
412 ps3_system_bus_set_drvdata(&dev->sbd, NULL);
413fail:
414 ps3flash_dev = NULL;
415 return error;
416}
417
418static int ps3flash_remove(struct ps3_system_bus_device *_dev)
419{
420 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
421
422 ps3_os_area_flash_register(NULL);
423 misc_deregister(&ps3flash_misc);
424 ps3stor_teardown(dev);
425 kfree(ps3_system_bus_get_drvdata(&dev->sbd));
426 ps3_system_bus_set_drvdata(&dev->sbd, NULL);
427 ps3flash_dev = NULL;
428 return 0;
429}
430
431
432static struct ps3_system_bus_driver ps3flash = {
433 .match_id = PS3_MATCH_ID_STOR_FLASH,
434 .core.name = DEVICE_NAME,
435 .core.owner = THIS_MODULE,
436 .probe = ps3flash_probe,
437 .remove = ps3flash_remove,
438 .shutdown = ps3flash_remove,
439};
440
441
442static int __init ps3flash_init(void)
443{
444 return ps3_system_bus_driver_register(&ps3flash);
445}
446
447static void __exit ps3flash_exit(void)
448{
449 ps3_system_bus_driver_unregister(&ps3flash);
450}
451
452module_init(ps3flash_init);
453module_exit(ps3flash_exit);
454
455MODULE_LICENSE("GPL");
456MODULE_DESCRIPTION("PS3 FLASH ROM Storage Driver");
457MODULE_AUTHOR("Sony Corporation");
458MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_FLASH);