ps3: FLASH ROM Storage Driver
Add a FLASH ROM Storage Driver for the PS3:
- Implemented as a misc character device driver
- Uses a fixed 256 KiB buffer allocated from boot memory as the hypervisor
requires the writing of aligned 256 KiB blocks
Cc: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hifive-unleashed-5.1
Geert Uytterhoeven
Linus Torvalds
parent
9aea8cbf28
commit
f96526354b
|
|
@ -123,4 +123,19 @@ config PS3_ROM
|
|||
In general, all users will say Y or M.
|
||||
Also make sure to say Y or M to "SCSI CDROM support" later.
|
||||
|
||||
config PS3_FLASH
|
||||
tristate "PS3 FLASH ROM Storage Driver"
|
||||
depends on PPC_PS3
|
||||
select PS3_STORAGE
|
||||
help
|
||||
Include support for the PS3 FLASH ROM Storage.
|
||||
|
||||
This support is required to access the PS3 FLASH ROM, which
|
||||
contains the boot loader and some boot options.
|
||||
In general, all users will say Y or M.
|
||||
|
||||
As this driver needs a fixed buffer of 256 KiB of memory, it can
|
||||
be disabled on the kernel command line using "ps3flash=off", to
|
||||
not allocate this fixed buffer.
|
||||
|
||||
endmenu
|
||||
|
|
|
|||
|
|
@ -107,6 +107,8 @@ obj-$(CONFIG_IPMI_HANDLER) += ipmi/
|
|||
obj-$(CONFIG_HANGCHECK_TIMER) += hangcheck-timer.o
|
||||
obj-$(CONFIG_TCG_TPM) += tpm/
|
||||
|
||||
obj-$(CONFIG_PS3_FLASH) += ps3flash.o
|
||||
|
||||
# Files generated that shall be removed upon make clean
|
||||
clean-files := consolemap_deftbl.c defkeymap.c
|
||||
|
||||
|
|
|
|||
|
|
@ -0,0 +1,440 @@
|
|||
/*
|
||||
* PS3 FLASH ROM Storage Driver
|
||||
*
|
||||
* 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/fs.h>
|
||||
#include <linux/miscdevice.h>
|
||||
#include <linux/uaccess.h>
|
||||
|
||||
#include <asm/lv1call.h>
|
||||
#include <asm/ps3stor.h>
|
||||
|
||||
|
||||
#define DEVICE_NAME "ps3flash"
|
||||
|
||||
#define FLASH_BLOCK_SIZE (256*1024)
|
||||
|
||||
|
||||
struct ps3flash_private {
|
||||
struct mutex mutex; /* Bounce buffer mutex */
|
||||
};
|
||||
|
||||
static struct ps3_storage_device *ps3flash_dev;
|
||||
|
||||
static ssize_t ps3flash_read_write_sectors(struct ps3_storage_device *dev,
|
||||
u64 lpar, u64 start_sector,
|
||||
u64 sectors, int write)
|
||||
{
|
||||
u64 res = ps3stor_read_write_sectors(dev, lpar, start_sector, sectors,
|
||||
write);
|
||||
if (res) {
|
||||
dev_err(&dev->sbd.core, "%s:%u: %s failed 0x%lx\n", __func__,
|
||||
__LINE__, write ? "write" : "read", res);
|
||||
return -EIO;
|
||||
}
|
||||
return sectors;
|
||||
}
|
||||
|
||||
static ssize_t ps3flash_read_sectors(struct ps3_storage_device *dev,
|
||||
u64 start_sector, u64 sectors,
|
||||
unsigned int sector_offset)
|
||||
{
|
||||
u64 max_sectors, lpar;
|
||||
|
||||
max_sectors = dev->bounce_size / dev->blk_size;
|
||||
if (sectors > max_sectors) {
|
||||
dev_dbg(&dev->sbd.core, "%s:%u Limiting sectors to %lu\n",
|
||||
__func__, __LINE__, max_sectors);
|
||||
sectors = max_sectors;
|
||||
}
|
||||
|
||||
lpar = dev->bounce_lpar + sector_offset * dev->blk_size;
|
||||
return ps3flash_read_write_sectors(dev, lpar, start_sector, sectors,
|
||||
0);
|
||||
}
|
||||
|
||||
static ssize_t ps3flash_write_chunk(struct ps3_storage_device *dev,
|
||||
u64 start_sector)
|
||||
{
|
||||
u64 sectors = dev->bounce_size / dev->blk_size;
|
||||
return ps3flash_read_write_sectors(dev, dev->bounce_lpar, start_sector,
|
||||
sectors, 1);
|
||||
}
|
||||
|
||||
static loff_t ps3flash_llseek(struct file *file, loff_t offset, int origin)
|
||||
{
|
||||
struct ps3_storage_device *dev = ps3flash_dev;
|
||||
loff_t res;
|
||||
|
||||
mutex_lock(&file->f_mapping->host->i_mutex);
|
||||
switch (origin) {
|
||||
case 1:
|
||||
offset += file->f_pos;
|
||||
break;
|
||||
case 2:
|
||||
offset += dev->regions[dev->region_idx].size*dev->blk_size;
|
||||
break;
|
||||
}
|
||||
if (offset < 0) {
|
||||
res = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
file->f_pos = offset;
|
||||
res = file->f_pos;
|
||||
|
||||
out:
|
||||
mutex_unlock(&file->f_mapping->host->i_mutex);
|
||||
return res;
|
||||
}
|
||||
|
||||
static ssize_t ps3flash_read(struct file *file, char __user *buf, size_t count,
|
||||
loff_t *pos)
|
||||
{
|
||||
struct ps3_storage_device *dev = ps3flash_dev;
|
||||
struct ps3flash_private *priv = dev->sbd.core.driver_data;
|
||||
u64 size, start_sector, end_sector, offset;
|
||||
ssize_t sectors_read;
|
||||
size_t remaining, n;
|
||||
|
||||
dev_dbg(&dev->sbd.core,
|
||||
"%s:%u: Reading %zu bytes at position %lld to user 0x%p\n",
|
||||
__func__, __LINE__, count, *pos, buf);
|
||||
|
||||
size = dev->regions[dev->region_idx].size*dev->blk_size;
|
||||
if (*pos >= size || !count)
|
||||
return 0;
|
||||
|
||||
if (*pos + count > size) {
|
||||
dev_dbg(&dev->sbd.core,
|
||||
"%s:%u Truncating count from %zu to %llu\n", __func__,
|
||||
__LINE__, count, size - *pos);
|
||||
count = size - *pos;
|
||||
}
|
||||
|
||||
start_sector = *pos / dev->blk_size;
|
||||
offset = *pos % dev->blk_size;
|
||||
end_sector = DIV_ROUND_UP(*pos + count, dev->blk_size);
|
||||
|
||||
remaining = count;
|
||||
do {
|
||||
mutex_lock(&priv->mutex);
|
||||
|
||||
sectors_read = ps3flash_read_sectors(dev, start_sector,
|
||||
end_sector-start_sector,
|
||||
0);
|
||||
if (sectors_read < 0) {
|
||||
mutex_unlock(&priv->mutex);
|
||||
goto fail;
|
||||
}
|
||||
|
||||
n = min(remaining, sectors_read*dev->blk_size-offset);
|
||||
dev_dbg(&dev->sbd.core,
|
||||
"%s:%u: copy %lu bytes from 0x%p to user 0x%p\n",
|
||||
__func__, __LINE__, n, dev->bounce_buf+offset, buf);
|
||||
if (copy_to_user(buf, dev->bounce_buf+offset, n)) {
|
||||
mutex_unlock(&priv->mutex);
|
||||
sectors_read = -EFAULT;
|
||||
goto fail;
|
||||
}
|
||||
|
||||
mutex_unlock(&priv->mutex);
|
||||
|
||||
*pos += n;
|
||||
buf += n;
|
||||
remaining -= n;
|
||||
start_sector += sectors_read;
|
||||
offset = 0;
|
||||
} while (remaining > 0);
|
||||
|
||||
return count;
|
||||
|
||||
fail:
|
||||
return sectors_read;
|
||||
}
|
||||
|
||||
static ssize_t ps3flash_write(struct file *file, const char __user *buf,
|
||||
size_t count, loff_t *pos)
|
||||
{
|
||||
struct ps3_storage_device *dev = ps3flash_dev;
|
||||
struct ps3flash_private *priv = dev->sbd.core.driver_data;
|
||||
u64 size, chunk_sectors, start_write_sector, end_write_sector,
|
||||
end_read_sector, start_read_sector, head, tail, offset;
|
||||
ssize_t res;
|
||||
size_t remaining, n;
|
||||
unsigned int sec_off;
|
||||
|
||||
dev_dbg(&dev->sbd.core,
|
||||
"%s:%u: Writing %zu bytes at position %lld from user 0x%p\n",
|
||||
__func__, __LINE__, count, *pos, buf);
|
||||
|
||||
size = dev->regions[dev->region_idx].size*dev->blk_size;
|
||||
if (*pos >= size || !count)
|
||||
return 0;
|
||||
|
||||
if (*pos + count > size) {
|
||||
dev_dbg(&dev->sbd.core,
|
||||
"%s:%u Truncating count from %zu to %llu\n", __func__,
|
||||
__LINE__, count, size - *pos);
|
||||
count = size - *pos;
|
||||
}
|
||||
|
||||
chunk_sectors = dev->bounce_size / dev->blk_size;
|
||||
|
||||
start_write_sector = *pos / dev->bounce_size * chunk_sectors;
|
||||
offset = *pos % dev->bounce_size;
|
||||
end_write_sector = DIV_ROUND_UP(*pos + count, dev->bounce_size) *
|
||||
chunk_sectors;
|
||||
|
||||
end_read_sector = DIV_ROUND_UP(*pos, dev->blk_size);
|
||||
start_read_sector = (*pos + count) / dev->blk_size;
|
||||
|
||||
/*
|
||||
* As we have to write in 256 KiB chunks, while we can read in blk_size
|
||||
* (usually 512 bytes) chunks, we perform the following steps:
|
||||
* 1. Read from start_write_sector to end_read_sector ("head")
|
||||
* 2. Read from start_read_sector to end_write_sector ("tail")
|
||||
* 3. Copy data to buffer
|
||||
* 4. Write from start_write_sector to end_write_sector
|
||||
* All of this is complicated by using only one 256 KiB bounce buffer.
|
||||
*/
|
||||
|
||||
head = end_read_sector - start_write_sector;
|
||||
tail = end_write_sector - start_read_sector;
|
||||
|
||||
remaining = count;
|
||||
do {
|
||||
mutex_lock(&priv->mutex);
|
||||
|
||||
if (end_read_sector >= start_read_sector) {
|
||||
/* Merge head and tail */
|
||||
dev_dbg(&dev->sbd.core,
|
||||
"Merged head and tail: %lu sectors at %lu\n",
|
||||
chunk_sectors, start_write_sector);
|
||||
res = ps3flash_read_sectors(dev, start_write_sector,
|
||||
chunk_sectors, 0);
|
||||
if (res < 0)
|
||||
goto fail;
|
||||
} else {
|
||||
if (head) {
|
||||
/* Read head */
|
||||
dev_dbg(&dev->sbd.core,
|
||||
"head: %lu sectors at %lu\n", head,
|
||||
start_write_sector);
|
||||
res = ps3flash_read_sectors(dev,
|
||||
start_write_sector,
|
||||
head, 0);
|
||||
if (res < 0)
|
||||
goto fail;
|
||||
}
|
||||
if (start_read_sector <
|
||||
start_write_sector+chunk_sectors) {
|
||||
/* Read tail */
|
||||
dev_dbg(&dev->sbd.core,
|
||||
"tail: %lu sectors at %lu\n", tail,
|
||||
start_read_sector);
|
||||
sec_off = start_read_sector-start_write_sector;
|
||||
res = ps3flash_read_sectors(dev,
|
||||
start_read_sector,
|
||||
tail, sec_off);
|
||||
if (res < 0)
|
||||
goto fail;
|
||||
}
|
||||
}
|
||||
|
||||
n = min(remaining, dev->bounce_size-offset);
|
||||
dev_dbg(&dev->sbd.core,
|
||||
"%s:%u: copy %lu bytes from user 0x%p to 0x%p\n",
|
||||
__func__, __LINE__, n, buf, dev->bounce_buf+offset);
|
||||
if (copy_from_user(dev->bounce_buf+offset, buf, n)) {
|
||||
res = -EFAULT;
|
||||
goto fail;
|
||||
}
|
||||
|
||||
res = ps3flash_write_chunk(dev, start_write_sector);
|
||||
if (res < 0)
|
||||
goto fail;
|
||||
|
||||
mutex_unlock(&priv->mutex);
|
||||
|
||||
*pos += n;
|
||||
buf += n;
|
||||
remaining -= n;
|
||||
start_write_sector += chunk_sectors;
|
||||
head = 0;
|
||||
offset = 0;
|
||||
} while (remaining > 0);
|
||||
|
||||
return count;
|
||||
|
||||
fail:
|
||||
mutex_unlock(&priv->mutex);
|
||||
return res;
|
||||
}
|
||||
|
||||
|
||||
static irqreturn_t ps3flash_interrupt(int irq, void *data)
|
||||
{
|
||||
struct ps3_storage_device *dev = data;
|
||||
int res;
|
||||
u64 tag, status;
|
||||
|
||||
res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status);
|
||||
|
||||
if (tag != dev->tag)
|
||||
dev_err(&dev->sbd.core,
|
||||
"%s:%u: tag mismatch, got %lx, expected %lx\n",
|
||||
__func__, __LINE__, tag, dev->tag);
|
||||
|
||||
if (res) {
|
||||
dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%lx\n",
|
||||
__func__, __LINE__, res, status);
|
||||
} else {
|
||||
dev->lv1_status = status;
|
||||
complete(&dev->done);
|
||||
}
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
|
||||
static const struct file_operations ps3flash_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.llseek = ps3flash_llseek,
|
||||
.read = ps3flash_read,
|
||||
.write = ps3flash_write,
|
||||
};
|
||||
|
||||
static struct miscdevice ps3flash_misc = {
|
||||
.minor = MISC_DYNAMIC_MINOR,
|
||||
.name = DEVICE_NAME,
|
||||
.fops = &ps3flash_fops,
|
||||
};
|
||||
|
||||
static int __devinit ps3flash_probe(struct ps3_system_bus_device *_dev)
|
||||
{
|
||||
struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
|
||||
struct ps3flash_private *priv;
|
||||
int error;
|
||||
unsigned long tmp;
|
||||
|
||||
tmp = dev->regions[dev->region_idx].start*dev->blk_size;
|
||||
if (tmp % FLASH_BLOCK_SIZE) {
|
||||
dev_err(&dev->sbd.core,
|
||||
"%s:%u region start %lu is not aligned\n", __func__,
|
||||
__LINE__, tmp);
|
||||
return -EINVAL;
|
||||
}
|
||||
tmp = dev->regions[dev->region_idx].size*dev->blk_size;
|
||||
if (tmp % FLASH_BLOCK_SIZE) {
|
||||
dev_err(&dev->sbd.core,
|
||||
"%s:%u region size %lu is not aligned\n", __func__,
|
||||
__LINE__, tmp);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* use static buffer, kmalloc cannot allocate 256 KiB */
|
||||
if (!ps3flash_bounce_buffer.address)
|
||||
return -ENODEV;
|
||||
|
||||
if (ps3flash_dev) {
|
||||
dev_err(&dev->sbd.core,
|
||||
"Only one FLASH device is supported\n");
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
ps3flash_dev = dev;
|
||||
|
||||
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
|
||||
if (!priv) {
|
||||
error = -ENOMEM;
|
||||
goto fail;
|
||||
}
|
||||
|
||||
dev->sbd.core.driver_data = priv;
|
||||
mutex_init(&priv->mutex);
|
||||
|
||||
dev->bounce_size = ps3flash_bounce_buffer.size;
|
||||
dev->bounce_buf = ps3flash_bounce_buffer.address;
|
||||
|
||||
error = ps3stor_setup(dev, ps3flash_interrupt);
|
||||
if (error)
|
||||
goto fail_free_priv;
|
||||
|
||||
ps3flash_misc.parent = &dev->sbd.core;
|
||||
error = misc_register(&ps3flash_misc);
|
||||
if (error) {
|
||||
dev_err(&dev->sbd.core, "%s:%u: misc_register failed %d\n",
|
||||
__func__, __LINE__, error);
|
||||
goto fail_teardown;
|
||||
}
|
||||
|
||||
dev_info(&dev->sbd.core, "%s:%u: registered misc device %d\n",
|
||||
__func__, __LINE__, ps3flash_misc.minor);
|
||||
return 0;
|
||||
|
||||
fail_teardown:
|
||||
ps3stor_teardown(dev);
|
||||
fail_free_priv:
|
||||
kfree(priv);
|
||||
dev->sbd.core.driver_data = NULL;
|
||||
fail:
|
||||
ps3flash_dev = NULL;
|
||||
return error;
|
||||
}
|
||||
|
||||
static int ps3flash_remove(struct ps3_system_bus_device *_dev)
|
||||
{
|
||||
struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
|
||||
|
||||
misc_deregister(&ps3flash_misc);
|
||||
ps3stor_teardown(dev);
|
||||
kfree(dev->sbd.core.driver_data);
|
||||
dev->sbd.core.driver_data = NULL;
|
||||
ps3flash_dev = NULL;
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static struct ps3_system_bus_driver ps3flash = {
|
||||
.match_id = PS3_MATCH_ID_STOR_FLASH,
|
||||
.core.name = DEVICE_NAME,
|
||||
.core.owner = THIS_MODULE,
|
||||
.probe = ps3flash_probe,
|
||||
.remove = ps3flash_remove,
|
||||
.shutdown = ps3flash_remove,
|
||||
};
|
||||
|
||||
|
||||
static int __init ps3flash_init(void)
|
||||
{
|
||||
return ps3_system_bus_driver_register(&ps3flash);
|
||||
}
|
||||
|
||||
static void __exit ps3flash_exit(void)
|
||||
{
|
||||
ps3_system_bus_driver_unregister(&ps3flash);
|
||||
}
|
||||
|
||||
module_init(ps3flash_init);
|
||||
module_exit(ps3flash_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("PS3 FLASH ROM Storage Driver");
|
||||
MODULE_AUTHOR("Sony Corporation");
|
||||
MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_FLASH);
|
||||
Loading…
Reference in New Issue