303 lines
8.3 KiB
C
303 lines
8.3 KiB
C
/*
|
|
* 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 %llu size %llu\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 %llu sectors starting at %llu\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%llx\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%llx\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%llx 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%llx failed 0x%llx\n",
|
|
__func__, __LINE__, cmd, dev->lv1_status);
|
|
return dev->lv1_status;
|
|
}
|
|
|
|
dev_dbg(&dev->sbd.core, "%s:%u: command 0x%llx 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");
|