[linux.git] / drivers / ps3 / ps3stor_lib.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 <linux/module.h>

#include <asm/lv1call.h>
#include <asm/ps3stor.h>

/*
 * A workaround for flash memory I/O errors when the internal hard disk
 * has not been formatted for OtherOS use.  Delay disk close until flash
 * memory is closed.
 */

static struct ps3_flash_workaround {
	int flash_open;
	int disk_open;
	struct ps3_system_bus_device *disk_sbd;
} ps3_flash_workaround;

static int ps3stor_open_hv_device(struct ps3_system_bus_device *sbd)
{
	int error = ps3_open_hv_device(sbd);

	if (error)
		return error;

	if (sbd->match_id == PS3_MATCH_ID_STOR_FLASH)
		ps3_flash_workaround.flash_open = 1;

	if (sbd->match_id == PS3_MATCH_ID_STOR_DISK)
		ps3_flash_workaround.disk_open = 1;

	return 0;
}

static int ps3stor_close_hv_device(struct ps3_system_bus_device *sbd)
{
	int error;

	if (sbd->match_id == PS3_MATCH_ID_STOR_DISK
		&& ps3_flash_workaround.disk_open
		&& ps3_flash_workaround.flash_open) {
		ps3_flash_workaround.disk_sbd = sbd;
		return 0;
	}

	error = ps3_close_hv_device(sbd);

	if (error)
		return error;

	if (sbd->match_id == PS3_MATCH_ID_STOR_DISK)
		ps3_flash_workaround.disk_open = 0;

	if (sbd->match_id == PS3_MATCH_ID_STOR_FLASH) {
		ps3_flash_workaround.flash_open = 0;

		if (ps3_flash_workaround.disk_sbd) {
			ps3_close_hv_device(ps3_flash_workaround.disk_sbd);
			ps3_flash_workaround.disk_open = 0;
			ps3_flash_workaround.disk_sbd = NULL;
		}
	}

	return 0;
}

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 = ps3stor_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, 0,
			    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:
	ps3stor_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 = ps3stor_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");
Commit	Line	Data
80071802 GU	1	/*
	2	* PS3 Storage Library
	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/dma-mapping.h>
7dfe293c	22	#include <linux/module.h>
80071802 GU	23
	24	#include <asm/lv1call.h>
	25	#include <asm/ps3stor.h>
	26
bc00351e GL	27	/*
	28	* A workaround for flash memory I/O errors when the internal hard disk
	29	* has not been formatted for OtherOS use. Delay disk close until flash
	30	* memory is closed.
	31	*/
	32
	33	static struct ps3_flash_workaround {
	34	int flash_open;
	35	int disk_open;
	36	struct ps3_system_bus_device *disk_sbd;
	37	} ps3_flash_workaround;
	38
	39	static int ps3stor_open_hv_device(struct ps3_system_bus_device *sbd)
	40	{
	41	int error = ps3_open_hv_device(sbd);
	42
	43	if (error)
	44	return error;
	45
	46	if (sbd->match_id == PS3_MATCH_ID_STOR_FLASH)
	47	ps3_flash_workaround.flash_open = 1;
	48
	49	if (sbd->match_id == PS3_MATCH_ID_STOR_DISK)
	50	ps3_flash_workaround.disk_open = 1;
	51
	52	return 0;
	53	}
	54
	55	static int ps3stor_close_hv_device(struct ps3_system_bus_device *sbd)
	56	{
	57	int error;
	58
	59	if (sbd->match_id == PS3_MATCH_ID_STOR_DISK
	60	&& ps3_flash_workaround.disk_open
	61	&& ps3_flash_workaround.flash_open) {
	62	ps3_flash_workaround.disk_sbd = sbd;
	63	return 0;
	64	}
	65
	66	error = ps3_close_hv_device(sbd);
	67
	68	if (error)
	69	return error;
	70
	71	if (sbd->match_id == PS3_MATCH_ID_STOR_DISK)
	72	ps3_flash_workaround.disk_open = 0;
	73
	74	if (sbd->match_id == PS3_MATCH_ID_STOR_FLASH) {
	75	ps3_flash_workaround.flash_open = 0;
	76
	77	if (ps3_flash_workaround.disk_sbd) {
	78	ps3_close_hv_device(ps3_flash_workaround.disk_sbd);
	79	ps3_flash_workaround.disk_open = 0;
	80	ps3_flash_workaround.disk_sbd = NULL;
	81	}
	82	}
	83
	84	return 0;
	85	}
80071802 GU	86
	87	static int ps3stor_probe_access(struct ps3_storage_device *dev)
	88	{
	89	int res, error;
	90	unsigned int i;
	91	unsigned long n;
	92
	93	if (dev->sbd.match_id == PS3_MATCH_ID_STOR_ROM) {
	94	/* special case: CD-ROM is assumed always accessible */
	95	dev->accessible_regions = 1;
	96	return 0;
	97	}
	98
	99	error = -EPERM;
	100	for (i = 0; i < dev->num_regions; i++) {
	101	dev_dbg(&dev->sbd.core,
	102	"%s:%u: checking accessibility of region %u\n",
	103	__func__, __LINE__, i);
	104
	105	dev->region_idx = i;
	106	res = ps3stor_read_write_sectors(dev, dev->bounce_lpar, 0, 1,
	107	0);
	108	if (res) {
	109	dev_dbg(&dev->sbd.core, "%s:%u: read failed, "
	110	"region %u is not accessible\n", __func__,
	111	__LINE__, i);
	112	continue;
	113	}
	114
	115	dev_dbg(&dev->sbd.core, "%s:%u: region %u is accessible\n",
	116	__func__, __LINE__, i);
	117	set_bit(i, &dev->accessible_regions);
	118
	119	/* We can access at least one region */
	120	error = 0;
	121	}
	122	if (error)
	123	return error;
	124
	125	n = hweight_long(dev->accessible_regions);
	126	if (n > 1)
	127	dev_info(&dev->sbd.core,
	128	"%s:%u: %lu accessible regions found. Only the first "
898eb71c	129	"one will be used\n",
80071802 GU	130	__func__, __LINE__, n);
	131	dev->region_idx = __ffs(dev->accessible_regions);
	132	dev_info(&dev->sbd.core,
a9dad6e5	133	"First accessible region has index %u start %llu size %llu\n",
80071802 GU	134	dev->region_idx, dev->regions[dev->region_idx].start,
	135	dev->regions[dev->region_idx].size);
	136
	137	return 0;
	138	}
	139
	140
	141	/**
	142	* ps3stor_setup - Setup a storage device before use
	143	* @dev: Pointer to a struct ps3_storage_device
	144	* @handler: Pointer to an interrupt handler
	145	*
	146	* Returns 0 for success, or an error code
	147	*/
	148	int ps3stor_setup(struct ps3_storage_device *dev, irq_handler_t handler)
	149	{
	150	int error, res, alignment;
	151	enum ps3_dma_page_size page_size;
	152
bc00351e	153	error = ps3stor_open_hv_device(&dev->sbd);
80071802 GU	154	if (error) {
	155	dev_err(&dev->sbd.core,
	156	"%s:%u: ps3_open_hv_device failed %d\n", __func__,
	157	__LINE__, error);
	158	goto fail;
	159	}
	160
	161	error = ps3_sb_event_receive_port_setup(&dev->sbd, PS3_BINDING_CPU_ANY,
	162	&dev->irq);
	163	if (error) {
	164	dev_err(&dev->sbd.core,
	165	"%s:%u: ps3_sb_event_receive_port_setup failed %d\n",
	166	__func__, __LINE__, error);
	167	goto fail_close_device;
	168	}
	169
6ea741a1	170	error = request_irq(dev->irq, handler, 0,
80071802 GU	171	dev->sbd.core.driver->name, dev);
	172	if (error) {
	173	dev_err(&dev->sbd.core, "%s:%u: request_irq failed %d\n",
	174	__func__, __LINE__, error);
	175	goto fail_sb_event_receive_port_destroy;
	176	}
	177
	178	alignment = min(__ffs(dev->bounce_size),
	179	__ffs((unsigned long)dev->bounce_buf));
	180	if (alignment < 12) {
	181	dev_err(&dev->sbd.core,
	182	"%s:%u: bounce buffer not aligned (%lx at 0x%p)\n",
	183	__func__, __LINE__, dev->bounce_size, dev->bounce_buf);
	184	error = -EINVAL;
	185	goto fail_free_irq;
	186	} else if (alignment < 16)
	187	page_size = PS3_DMA_4K;
	188	else
	189	page_size = PS3_DMA_64K;
	190	dev->sbd.d_region = &dev->dma_region;
	191	ps3_dma_region_init(&dev->sbd, &dev->dma_region, page_size,
	192	PS3_DMA_OTHER, dev->bounce_buf, dev->bounce_size);
	193	res = ps3_dma_region_create(&dev->dma_region);
	194	if (res) {
	195	dev_err(&dev->sbd.core, "%s:%u: cannot create DMA region\n",
	196	__func__, __LINE__);
	197	error = -ENOMEM;
	198	goto fail_free_irq;
	199	}
	200
	201	dev->bounce_lpar = ps3_mm_phys_to_lpar(__pa(dev->bounce_buf));
	202	dev->bounce_dma = dma_map_single(&dev->sbd.core, dev->bounce_buf,
	203	dev->bounce_size, DMA_BIDIRECTIONAL);
	204	if (!dev->bounce_dma) {
	205	dev_err(&dev->sbd.core, "%s:%u: map DMA region failed\n",
	206	__func__, __LINE__);
	207	error = -ENODEV;
	208	goto fail_free_dma;
	209	}
	210
	211	error = ps3stor_probe_access(dev);
	212	if (error) {
	213	dev_err(&dev->sbd.core, "%s:%u: No accessible regions found\n",
	214	__func__, __LINE__);
	215	goto fail_unmap_dma;
	216	}
	217	return 0;
	218
	219	fail_unmap_dma:
	220	dma_unmap_single(&dev->sbd.core, dev->bounce_dma, dev->bounce_size,
	221	DMA_BIDIRECTIONAL);
	222	fail_free_dma:
	223	ps3_dma_region_free(&dev->dma_region);
	224	fail_free_irq:
	225	free_irq(dev->irq, dev);
	226	fail_sb_event_receive_port_destroy:
	227	ps3_sb_event_receive_port_destroy(&dev->sbd, dev->irq);
	228	fail_close_device:
bc00351e	229	ps3stor_close_hv_device(&dev->sbd);
80071802 GU	230	fail:
	231	return error;
	232	}
	233	EXPORT_SYMBOL_GPL(ps3stor_setup);
	234
	235
	236	/**
	237	* ps3stor_teardown - Tear down a storage device after use
	238	* @dev: Pointer to a struct ps3_storage_device
	239	*/
	240	void ps3stor_teardown(struct ps3_storage_device *dev)
	241	{
	242	int error;
	243
	244	dma_unmap_single(&dev->sbd.core, dev->bounce_dma, dev->bounce_size,
	245	DMA_BIDIRECTIONAL);
	246	ps3_dma_region_free(&dev->dma_region);
	247
	248	free_irq(dev->irq, dev);
	249
	250	error = ps3_sb_event_receive_port_destroy(&dev->sbd, dev->irq);
	251	if (error)
	252	dev_err(&dev->sbd.core,
	253	"%s:%u: destroy event receive port failed %d\n",
	254	__func__, __LINE__, error);
	255
bc00351e	256	error = ps3stor_close_hv_device(&dev->sbd);
80071802 GU	257	if (error)
	258	dev_err(&dev->sbd.core,
	259	"%s:%u: ps3_close_hv_device failed %d\n", __func__,
	260	__LINE__, error);
	261	}
	262	EXPORT_SYMBOL_GPL(ps3stor_teardown);
	263
	264
	265	/**
	266	* ps3stor_read_write_sectors - read/write from/to a storage device
	267	* @dev: Pointer to a struct ps3_storage_device
	268	* @lpar: HV logical partition address
	269	* @start_sector: First sector to read/write
	270	* @sectors: Number of sectors to read/write
	271	* @write: Flag indicating write (non-zero) or read (zero)
	272	*
	273	* Returns 0 for success, -1 in case of failure to submit the command, or
	274	* an LV1 status value in case of other errors
	275	*/
	276	u64 ps3stor_read_write_sectors(struct ps3_storage_device *dev, u64 lpar,
	277	u64 start_sector, u64 sectors, int write)
	278	{
	279	unsigned int region_id = dev->regions[dev->region_idx].id;
	280	const char *op = write ? "write" : "read";
	281	int res;
	282
a9dad6e5	283	dev_dbg(&dev->sbd.core, "%s:%u: %s %llu sectors starting at %llu\n",
80071802 GU	284	__func__, __LINE__, op, sectors, start_sector);
	285
	286	init_completion(&dev->done);
	287	res = write ? lv1_storage_write(dev->sbd.dev_id, region_id,
	288	start_sector, sectors, 0, lpar,
	289	&dev->tag)
	290	: lv1_storage_read(dev->sbd.dev_id, region_id,
	291	start_sector, sectors, 0, lpar,
	292	&dev->tag);
	293	if (res) {
	294	dev_dbg(&dev->sbd.core, "%s:%u: %s failed %d\n", __func__,
	295	__LINE__, op, res);
	296	return -1;
	297	}
	298
	299	wait_for_completion(&dev->done);
	300	if (dev->lv1_status) {
a9dad6e5	301	dev_dbg(&dev->sbd.core, "%s:%u: %s failed 0x%llx\n", __func__,
80071802 GU	302	__LINE__, op, dev->lv1_status);
	303	return dev->lv1_status;
	304	}
	305
	306	dev_dbg(&dev->sbd.core, "%s:%u: %s completed\n", __func__, __LINE__,
	307	op);
	308
	309	return 0;
	310	}
	311	EXPORT_SYMBOL_GPL(ps3stor_read_write_sectors);
	312
	313
	314	/**
	315	* ps3stor_send_command - send a device command to a storage device
	316	* @dev: Pointer to a struct ps3_storage_device
	317	* @cmd: Command number
	318	* @arg1: First command argument
	319	* @arg2: Second command argument
	320	* @arg3: Third command argument
	321	* @arg4: Fourth command argument
	322	*
	323	* Returns 0 for success, -1 in case of failure to submit the command, or
	324	* an LV1 status value in case of other errors
	325	*/
	326	u64 ps3stor_send_command(struct ps3_storage_device *dev, u64 cmd, u64 arg1,
	327	u64 arg2, u64 arg3, u64 arg4)
	328	{
	329	int res;
	330
a9dad6e5	331	dev_dbg(&dev->sbd.core, "%s:%u: send device command 0x%llx\n", __func__,
80071802 GU	332	__LINE__, cmd);
	333
	334	init_completion(&dev->done);
	335
	336	res = lv1_storage_send_device_command(dev->sbd.dev_id, cmd, arg1,
	337	arg2, arg3, arg4, &dev->tag);
	338	if (res) {
	339	dev_err(&dev->sbd.core,
a9dad6e5	340	"%s:%u: send_device_command 0x%llx failed %d\n",
80071802 GU	341	__func__, __LINE__, cmd, res);
	342	return -1;
	343	}
	344
	345	wait_for_completion(&dev->done);
	346	if (dev->lv1_status) {
a9dad6e5	347	dev_dbg(&dev->sbd.core, "%s:%u: command 0x%llx failed 0x%llx\n",
80071802 GU	348	__func__, __LINE__, cmd, dev->lv1_status);
	349	return dev->lv1_status;
	350	}
	351
a9dad6e5	352	dev_dbg(&dev->sbd.core, "%s:%u: command 0x%llx completed\n", __func__,
80071802 GU	353	__LINE__, cmd);
	354
	355	return 0;
	356	}
	357	EXPORT_SYMBOL_GPL(ps3stor_send_command);
	358
	359
	360	MODULE_LICENSE("GPL");
	361	MODULE_DESCRIPTION("PS3 Storage Bus Library");
	362	MODULE_AUTHOR("Sony Corporation");