[linux.git] / drivers / scsi / ps3rom.c

/*
 * PS3 BD/DVD/CD-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/cdrom.h>
#include <linux/highmem.h>
#include <linux/slab.h>

#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_dbg.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_eh.h>

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


#define DEVICE_NAME			"ps3rom"

#define BOUNCE_SIZE			(64*1024)

#define PS3ROM_MAX_SECTORS		(BOUNCE_SIZE >> 9)


struct ps3rom_private {
	struct ps3_storage_device *dev;
	struct scsi_cmnd *curr_cmd;
};


#define LV1_STORAGE_SEND_ATAPI_COMMAND	(1)

struct lv1_atapi_cmnd_block {
	u8	pkt[32];	/* packet command block           */
	u32	pktlen;		/* should be 12 for ATAPI 8020    */
	u32	blocks;
	u32	block_size;
	u32	proto;		/* transfer mode                  */
	u32	in_out;		/* transfer direction             */
	u64	buffer;		/* parameter except command block */
	u32	arglen;		/* length above                   */
};

enum lv1_atapi_proto {
	NON_DATA_PROTO     = 0,
	PIO_DATA_IN_PROTO  = 1,
	PIO_DATA_OUT_PROTO = 2,
	DMA_PROTO = 3
};

enum lv1_atapi_in_out {
	DIR_WRITE = 0,		/* memory -> device */
	DIR_READ = 1		/* device -> memory */
};


static int ps3rom_slave_configure(struct scsi_device *scsi_dev)
{
	struct ps3rom_private *priv = shost_priv(scsi_dev->host);
	struct ps3_storage_device *dev = priv->dev;

	dev_dbg(&dev->sbd.core, "%s:%u: id %u, lun %u, channel %u\n", __func__,
		__LINE__, scsi_dev->id, scsi_dev->lun, scsi_dev->channel);

	/*
	 * ATAPI SFF8020 devices use MODE_SENSE_10,
	 * so we can prohibit MODE_SENSE_6
	 */
	scsi_dev->use_10_for_ms = 1;

	/* we don't support {READ,WRITE}_6 */
	scsi_dev->use_10_for_rw = 1;

	return 0;
}

static int ps3rom_atapi_request(struct ps3_storage_device *dev,
				struct scsi_cmnd *cmd)
{
	struct lv1_atapi_cmnd_block atapi_cmnd;
	unsigned char opcode = cmd->cmnd[0];
	int res;
	u64 lpar;

	dev_dbg(&dev->sbd.core, "%s:%u: send ATAPI command 0x%02x\n", __func__,
		__LINE__, opcode);

	memset(&atapi_cmnd, 0, sizeof(struct lv1_atapi_cmnd_block));
	memcpy(&atapi_cmnd.pkt, cmd->cmnd, 12);
	atapi_cmnd.pktlen = 12;
	atapi_cmnd.block_size = 1; /* transfer size is block_size * blocks */
	atapi_cmnd.blocks = atapi_cmnd.arglen = scsi_bufflen(cmd);
	atapi_cmnd.buffer = dev->bounce_lpar;

	switch (cmd->sc_data_direction) {
	case DMA_FROM_DEVICE:
		if (scsi_bufflen(cmd) >= CD_FRAMESIZE)
			atapi_cmnd.proto = DMA_PROTO;
		else
			atapi_cmnd.proto = PIO_DATA_IN_PROTO;
		atapi_cmnd.in_out = DIR_READ;
		break;

	case DMA_TO_DEVICE:
		if (scsi_bufflen(cmd) >= CD_FRAMESIZE)
			atapi_cmnd.proto = DMA_PROTO;
		else
			atapi_cmnd.proto = PIO_DATA_OUT_PROTO;
		atapi_cmnd.in_out = DIR_WRITE;
		scsi_sg_copy_to_buffer(cmd, dev->bounce_buf, dev->bounce_size);
		break;

	default:
		atapi_cmnd.proto = NON_DATA_PROTO;
		break;
	}

	lpar = ps3_mm_phys_to_lpar(__pa(&atapi_cmnd));
	res = lv1_storage_send_device_command(dev->sbd.dev_id,
					      LV1_STORAGE_SEND_ATAPI_COMMAND,
					      lpar, sizeof(atapi_cmnd),
					      atapi_cmnd.buffer,
					      atapi_cmnd.arglen, &dev->tag);
	if (res == LV1_DENIED_BY_POLICY) {
		dev_dbg(&dev->sbd.core,
			"%s:%u: ATAPI command 0x%02x denied by policy\n",
			__func__, __LINE__, opcode);
		return DID_ERROR << 16;
	}

	if (res) {
		dev_err(&dev->sbd.core,
			"%s:%u: ATAPI command 0x%02x failed %d\n", __func__,
			__LINE__, opcode, res);
		return DID_ERROR << 16;
	}

	return 0;
}

static inline unsigned int srb10_lba(const struct scsi_cmnd *cmd)
{
	return cmd->cmnd[2] << 24 | cmd->cmnd[3] << 16 | cmd->cmnd[4] << 8 |
	       cmd->cmnd[5];
}

static inline unsigned int srb10_len(const struct scsi_cmnd *cmd)
{
	return cmd->cmnd[7] << 8 | cmd->cmnd[8];
}

static int ps3rom_read_request(struct ps3_storage_device *dev,
			       struct scsi_cmnd *cmd, u32 start_sector,
			       u32 sectors)
{
	int res;

	dev_dbg(&dev->sbd.core, "%s:%u: read %u sectors starting at %u\n",
		__func__, __LINE__, sectors, start_sector);

	res = lv1_storage_read(dev->sbd.dev_id,
			       dev->regions[dev->region_idx].id, start_sector,
			       sectors, 0, dev->bounce_lpar, &dev->tag);
	if (res) {
		dev_err(&dev->sbd.core, "%s:%u: read failed %d\n", __func__,
			__LINE__, res);
		return DID_ERROR << 16;
	}

	return 0;
}

static int ps3rom_write_request(struct ps3_storage_device *dev,
				struct scsi_cmnd *cmd, u32 start_sector,
				u32 sectors)
{
	int res;

	dev_dbg(&dev->sbd.core, "%s:%u: write %u sectors starting at %u\n",
		__func__, __LINE__, sectors, start_sector);

	scsi_sg_copy_to_buffer(cmd, dev->bounce_buf, dev->bounce_size);

	res = lv1_storage_write(dev->sbd.dev_id,
				dev->regions[dev->region_idx].id, start_sector,
				sectors, 0, dev->bounce_lpar, &dev->tag);
	if (res) {
		dev_err(&dev->sbd.core, "%s:%u: write failed %d\n", __func__,
			__LINE__, res);
		return DID_ERROR << 16;
	}

	return 0;
}

static int ps3rom_queuecommand(struct scsi_cmnd *cmd,
			       void (*done)(struct scsi_cmnd *))
{
	struct ps3rom_private *priv = shost_priv(cmd->device->host);
	struct ps3_storage_device *dev = priv->dev;
	unsigned char opcode;
	int res;

#ifdef DEBUG
	scsi_print_command(cmd);
#endif

	priv->curr_cmd = cmd;
	cmd->scsi_done = done;

	opcode = cmd->cmnd[0];
	/*
	 * While we can submit READ/WRITE SCSI commands as ATAPI commands,
	 * it's recommended for various reasons (performance, error handling,
	 * ...) to use lv1_storage_{read,write}() instead
	 */
	switch (opcode) {
	case READ_10:
		res = ps3rom_read_request(dev, cmd, srb10_lba(cmd),
					  srb10_len(cmd));
		break;

	case WRITE_10:
		res = ps3rom_write_request(dev, cmd, srb10_lba(cmd),
					   srb10_len(cmd));
		break;

	default:
		res = ps3rom_atapi_request(dev, cmd);
		break;
	}

	if (res) {
		memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
		cmd->result = res;
		cmd->sense_buffer[0] = 0x70;
		cmd->sense_buffer[2] = ILLEGAL_REQUEST;
		priv->curr_cmd = NULL;
		cmd->scsi_done(cmd);
	}

	return 0;
}

static int decode_lv1_status(u64 status, unsigned char *sense_key,
			     unsigned char *asc, unsigned char *ascq)
{
	if (((status >> 24) & 0xff) != SAM_STAT_CHECK_CONDITION)
		return -1;

	*sense_key = (status >> 16) & 0xff;
	*asc       = (status >>  8) & 0xff;
	*ascq      =  status        & 0xff;
	return 0;
}

static irqreturn_t ps3rom_interrupt(int irq, void *data)
{
	struct ps3_storage_device *dev = data;
	struct Scsi_Host *host;
	struct ps3rom_private *priv;
	struct scsi_cmnd *cmd;
	int res;
	u64 tag, status;
	unsigned char sense_key, asc, ascq;

	res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status);
	/*
	 * status = -1 may mean that ATAPI transport completed OK, but
	 * ATAPI command itself resulted CHECK CONDITION
	 * so, upper layer should issue REQUEST_SENSE to check the sense data
	 */

	if (tag != dev->tag)
		dev_err(&dev->sbd.core,
			"%s:%u: tag mismatch, got %llx, expected %llx\n",
			__func__, __LINE__, tag, dev->tag);

	if (res) {
		dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%llx\n",
			__func__, __LINE__, res, status);
		return IRQ_HANDLED;
	}

	host = ps3_system_bus_get_drvdata(&dev->sbd);
	priv = shost_priv(host);
	cmd = priv->curr_cmd;

	if (!status) {
		/* OK, completed */
		if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
			int len;

			len = scsi_sg_copy_from_buffer(cmd,
						       dev->bounce_buf,
						       dev->bounce_size);

			scsi_set_resid(cmd, scsi_bufflen(cmd) - len);
		}
		cmd->result = DID_OK << 16;
		goto done;
	}

	if (cmd->cmnd[0] == REQUEST_SENSE) {
		/* SCSI spec says request sense should never get error */
		dev_err(&dev->sbd.core, "%s:%u: end error without autosense\n",
			__func__, __LINE__);
		cmd->result = DID_ERROR << 16 | SAM_STAT_CHECK_CONDITION;
		goto done;
	}

	if (decode_lv1_status(status, &sense_key, &asc, &ascq)) {
		cmd->result = DID_ERROR << 16;
		goto done;
	}

	scsi_build_sense_buffer(0, cmd->sense_buffer, sense_key, asc, ascq);
	cmd->result = SAM_STAT_CHECK_CONDITION;

done:
	priv->curr_cmd = NULL;
	cmd->scsi_done(cmd);
	return IRQ_HANDLED;
}

static struct scsi_host_template ps3rom_host_template = {
	.name =			DEVICE_NAME,
	.slave_configure =	ps3rom_slave_configure,
	.queuecommand =		ps3rom_queuecommand,
	.can_queue =		1,
	.this_id =		7,
	.sg_tablesize =		SG_ALL,
	.cmd_per_lun =		1,
	.emulated =             1,		/* only sg driver uses this */
	.max_sectors =		PS3ROM_MAX_SECTORS,
	.use_clustering =	ENABLE_CLUSTERING,
	.module =		THIS_MODULE,
};


static int __devinit ps3rom_probe(struct ps3_system_bus_device *_dev)
{
	struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
	int error;
	struct Scsi_Host *host;
	struct ps3rom_private *priv;

	if (dev->blk_size != CD_FRAMESIZE) {
		dev_err(&dev->sbd.core,
			"%s:%u: cannot handle block size %llu\n", __func__,
			__LINE__, dev->blk_size);
		return -EINVAL;
	}

	dev->bounce_size = BOUNCE_SIZE;
	dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA);
	if (!dev->bounce_buf)
		return -ENOMEM;

	error = ps3stor_setup(dev, ps3rom_interrupt);
	if (error)
		goto fail_free_bounce;

	host = scsi_host_alloc(&ps3rom_host_template,
			       sizeof(struct ps3rom_private));
	if (!host) {
		dev_err(&dev->sbd.core, "%s:%u: scsi_host_alloc failed\n",
			__func__, __LINE__);
		goto fail_teardown;
	}

	priv = shost_priv(host);
	ps3_system_bus_set_drvdata(&dev->sbd, host);
	priv->dev = dev;

	/* One device/LUN per SCSI bus */
	host->max_id = 1;
	host->max_lun = 1;

	error = scsi_add_host(host, &dev->sbd.core);
	if (error) {
		dev_err(&dev->sbd.core, "%s:%u: scsi_host_alloc failed %d\n",
			__func__, __LINE__, error);
		error = -ENODEV;
		goto fail_host_put;
	}

	scsi_scan_host(host);
	return 0;

fail_host_put:
	scsi_host_put(host);
	ps3_system_bus_set_drvdata(&dev->sbd, NULL);
fail_teardown:
	ps3stor_teardown(dev);
fail_free_bounce:
	kfree(dev->bounce_buf);
	return error;
}

static int ps3rom_remove(struct ps3_system_bus_device *_dev)
{
	struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
	struct Scsi_Host *host = ps3_system_bus_get_drvdata(&dev->sbd);

	scsi_remove_host(host);
	ps3stor_teardown(dev);
	scsi_host_put(host);
	ps3_system_bus_set_drvdata(&dev->sbd, NULL);
	kfree(dev->bounce_buf);
	return 0;
}

static struct ps3_system_bus_driver ps3rom = {
	.match_id	= PS3_MATCH_ID_STOR_ROM,
	.core.name	= DEVICE_NAME,
	.core.owner	= THIS_MODULE,
	.probe		= ps3rom_probe,
	.remove		= ps3rom_remove
};


static int __init ps3rom_init(void)
{
	return ps3_system_bus_driver_register(&ps3rom);
}

static void __exit ps3rom_exit(void)
{
	ps3_system_bus_driver_unregister(&ps3rom);
}

module_init(ps3rom_init);
module_exit(ps3rom_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("PS3 BD/DVD/CD-ROM Storage Driver");
MODULE_AUTHOR("Sony Corporation");
MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_ROM);
Commit	Line	Data
9aea8cbf GU	1	/*
	2	* PS3 BD/DVD/CD-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/cdrom.h>
	22	#include <linux/highmem.h>
5a0e3ad6	23	#include <linux/slab.h>
9aea8cbf GU	24
	25	#include <scsi/scsi.h>
	26	#include <scsi/scsi_cmnd.h>
	27	#include <scsi/scsi_dbg.h>
	28	#include <scsi/scsi_device.h>
	29	#include <scsi/scsi_host.h>
53df8ba8	30	#include <scsi/scsi_eh.h>
9aea8cbf GU	31
	32	#include <asm/lv1call.h>
	33	#include <asm/ps3stor.h>
	34
	35
	36	#define DEVICE_NAME "ps3rom"
	37
	38	#define BOUNCE_SIZE (64*1024)
	39
51883b5e	40	#define PS3ROM_MAX_SECTORS (BOUNCE_SIZE >> 9)
9aea8cbf GU	41
	42
	43	struct ps3rom_private {
	44	struct ps3_storage_device *dev;
	45	struct scsi_cmnd *curr_cmd;
	46	};
	47
	48
	49	#define LV1_STORAGE_SEND_ATAPI_COMMAND (1)
	50
	51	struct lv1_atapi_cmnd_block {
	52	u8 pkt[32]; /* packet command block */
	53	u32 pktlen; /* should be 12 for ATAPI 8020 */
	54	u32 blocks;
	55	u32 block_size;
	56	u32 proto; /* transfer mode */
	57	u32 in_out; /* transfer direction */
	58	u64 buffer; /* parameter except command block */
	59	u32 arglen; /* length above */
	60	};
	61
	62	enum lv1_atapi_proto {
	63	NON_DATA_PROTO = 0,
	64	PIO_DATA_IN_PROTO = 1,
	65	PIO_DATA_OUT_PROTO = 2,
	66	DMA_PROTO = 3
	67	};
	68
	69	enum lv1_atapi_in_out {
	70	DIR_WRITE = 0, /* memory -> device */
	71	DIR_READ = 1 /* device -> memory */
	72	};
	73
	74
	75	static int ps3rom_slave_configure(struct scsi_device *scsi_dev)
	76	{
	77	struct ps3rom_private *priv = shost_priv(scsi_dev->host);
	78	struct ps3_storage_device *dev = priv->dev;
	79
	80	dev_dbg(&dev->sbd.core, "%s:%u: id %u, lun %u, channel %u\n", __func__,
	81	__LINE__, scsi_dev->id, scsi_dev->lun, scsi_dev->channel);
	82
	83	/*
	84	* ATAPI SFF8020 devices use MODE_SENSE_10,
	85	* so we can prohibit MODE_SENSE_6
	86	*/
	87	scsi_dev->use_10_for_ms = 1;
	88
	89	/* we don't support {READ,WRITE}_6 */
	90	scsi_dev->use_10_for_rw = 1;
	91
	92	return 0;
	93	}
	94
9aea8cbf GU	95	static int ps3rom_atapi_request(struct ps3_storage_device *dev,
	96	struct scsi_cmnd *cmd)
	97	{
	98	struct lv1_atapi_cmnd_block atapi_cmnd;
	99	unsigned char opcode = cmd->cmnd[0];
	100	int res;
	101	u64 lpar;
	102
	103	dev_dbg(&dev->sbd.core, "%s:%u: send ATAPI command 0x%02x\n", __func__,
	104	__LINE__, opcode);
	105
	106	memset(&atapi_cmnd, 0, sizeof(struct lv1_atapi_cmnd_block));
	107	memcpy(&atapi_cmnd.pkt, cmd->cmnd, 12);
	108	atapi_cmnd.pktlen = 12;
	109	atapi_cmnd.block_size = 1; /* transfer size is block_size * blocks */
35814740	110	atapi_cmnd.blocks = atapi_cmnd.arglen = scsi_bufflen(cmd);
9aea8cbf GU	111	atapi_cmnd.buffer = dev->bounce_lpar;
	112
	113	switch (cmd->sc_data_direction) {
	114	case DMA_FROM_DEVICE:
35814740	115	if (scsi_bufflen(cmd) >= CD_FRAMESIZE)
9aea8cbf GU	116	atapi_cmnd.proto = DMA_PROTO;
	117	else
	118	atapi_cmnd.proto = PIO_DATA_IN_PROTO;
	119	atapi_cmnd.in_out = DIR_READ;
	120	break;
	121
	122	case DMA_TO_DEVICE:
35814740	123	if (scsi_bufflen(cmd) >= CD_FRAMESIZE)
9aea8cbf GU	124	atapi_cmnd.proto = DMA_PROTO;
	125	else
	126	atapi_cmnd.proto = PIO_DATA_OUT_PROTO;
	127	atapi_cmnd.in_out = DIR_WRITE;
944cf8b4	128	scsi_sg_copy_to_buffer(cmd, dev->bounce_buf, dev->bounce_size);
9aea8cbf GU	129	break;
	130
	131	default:
	132	atapi_cmnd.proto = NON_DATA_PROTO;
	133	break;
	134	}
	135
	136	lpar = ps3_mm_phys_to_lpar(__pa(&atapi_cmnd));
	137	res = lv1_storage_send_device_command(dev->sbd.dev_id,
	138	LV1_STORAGE_SEND_ATAPI_COMMAND,
	139	lpar, sizeof(atapi_cmnd),
	140	atapi_cmnd.buffer,
	141	atapi_cmnd.arglen, &dev->tag);
	142	if (res == LV1_DENIED_BY_POLICY) {
	143	dev_dbg(&dev->sbd.core,
	144	"%s:%u: ATAPI command 0x%02x denied by policy\n",
	145	__func__, __LINE__, opcode);
	146	return DID_ERROR << 16;
	147	}
	148
	149	if (res) {
	150	dev_err(&dev->sbd.core,
	151	"%s:%u: ATAPI command 0x%02x failed %d\n", __func__,
	152	__LINE__, opcode, res);
	153	return DID_ERROR << 16;
	154	}
	155
	156	return 0;
	157	}
	158
	159	static inline unsigned int srb10_lba(const struct scsi_cmnd *cmd)
	160	{
	161	return cmd->cmnd[2] << 24 \| cmd->cmnd[3] << 16 \| cmd->cmnd[4] << 8 \|
	162	cmd->cmnd[5];
	163	}
	164
	165	static inline unsigned int srb10_len(const struct scsi_cmnd *cmd)
	166	{
	167	return cmd->cmnd[7] << 8 \| cmd->cmnd[8];
	168	}
	169
	170	static int ps3rom_read_request(struct ps3_storage_device *dev,
	171	struct scsi_cmnd *cmd, u32 start_sector,
	172	u32 sectors)
	173	{
	174	int res;
	175
	176	dev_dbg(&dev->sbd.core, "%s:%u: read %u sectors starting at %u\n",
	177	__func__, __LINE__, sectors, start_sector);
	178
	179	res = lv1_storage_read(dev->sbd.dev_id,
	180	dev->regions[dev->region_idx].id, start_sector,
	181	sectors, 0, dev->bounce_lpar, &dev->tag);
	182	if (res) {
	183	dev_err(&dev->sbd.core, "%s:%u: read failed %d\n", __func__,
	184	__LINE__, res);
	185	return DID_ERROR << 16;
	186	}
	187
	188	return 0;
	189	}
	190
	191	static int ps3rom_write_request(struct ps3_storage_device *dev,
	192	struct scsi_cmnd *cmd, u32 start_sector,
193	u32 sectors)
194	{
195	int res;
196
197	dev_dbg(&dev->sbd.core, "%s:%u: write %u sectors starting at %u\n",
198	__func__, __LINE__, sectors, start_sector);
199
944cf8b4	200	scsi_sg_copy_to_buffer(cmd, dev->bounce_buf, dev->bounce_size);
9aea8cbf GU	201
	202	res = lv1_storage_write(dev->sbd.dev_id,
	203	dev->regions[dev->region_idx].id, start_sector,
	204	sectors, 0, dev->bounce_lpar, &dev->tag);
	205	if (res) {
	206	dev_err(&dev->sbd.core, "%s:%u: write failed %d\n", __func__,
	207	__LINE__, res);
	208	return DID_ERROR << 16;
	209	}
	210
	211	return 0;
	212	}
	213
	214	static int ps3rom_queuecommand(struct scsi_cmnd *cmd,
	215	void (done)(struct scsi_cmnd ))
	216	{
	217	struct ps3rom_private *priv = shost_priv(cmd->device->host);
	218	struct ps3_storage_device *dev = priv->dev;
	219	unsigned char opcode;
	220	int res;
	221
	222	#ifdef DEBUG
	223	scsi_print_command(cmd);
	224	#endif
	225
	226	priv->curr_cmd = cmd;
	227	cmd->scsi_done = done;
	228
	229	opcode = cmd->cmnd[0];
	230	/*
	231	* While we can submit READ/WRITE SCSI commands as ATAPI commands,
	232	* it's recommended for various reasons (performance, error handling,
	233	* ...) to use lv1_storage_{read,write}() instead
	234	*/
	235	switch (opcode) {
	236	case READ_10:
	237	res = ps3rom_read_request(dev, cmd, srb10_lba(cmd),
	238	srb10_len(cmd));
	239	break;
	240
	241	case WRITE_10:
	242	res = ps3rom_write_request(dev, cmd, srb10_lba(cmd),
	243	srb10_len(cmd));
	244	break;
	245
	246	default:
	247	res = ps3rom_atapi_request(dev, cmd);
	248	break;
	249	}
	250
	251	if (res) {
	252	memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
	253	cmd->result = res;
	254	cmd->sense_buffer[0] = 0x70;
	255	cmd->sense_buffer[2] = ILLEGAL_REQUEST;
	256	priv->curr_cmd = NULL;
	257	cmd->scsi_done(cmd);
	258	}
	259
	260	return 0;
	261	}
	262
	263	static int decode_lv1_status(u64 status, unsigned char *sense_key,
	264	unsigned char asc, unsigned char ascq)
265	{
266	if (((status >> 24) & 0xff) != SAM_STAT_CHECK_CONDITION)
267	return -1;
268
269	*sense_key = (status >> 16) & 0xff;
270	*asc = (status >> 8) & 0xff;
271	*ascq = status & 0xff;
272	return 0;
273	}
274
275	static irqreturn_t ps3rom_interrupt(int irq, void *data)
276	{
277	struct ps3_storage_device *dev = data;
278	struct Scsi_Host *host;
279	struct ps3rom_private *priv;
280	struct scsi_cmnd *cmd;
281	int res;
282	u64 tag, status;
283	unsigned char sense_key, asc, ascq;
284
285	res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status);
286	/*
287	* status = -1 may mean that ATAPI transport completed OK, but
288	* ATAPI command itself resulted CHECK CONDITION
289	* so, upper layer should issue REQUEST_SENSE to check the sense data
290	*/
291
292	if (tag != dev->tag)
293	dev_err(&dev->sbd.core,
7ad489e3	294	"%s:%u: tag mismatch, got %llx, expected %llx\n",
9aea8cbf GU	295	__func__, __LINE__, tag, dev->tag);
	296
	297	if (res) {
7ad489e3	298	dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%llx\n",
9aea8cbf GU	299	__func__, __LINE__, res, status);
	300	return IRQ_HANDLED;
	301	}
	302
c4b512bc	303	host = ps3_system_bus_get_drvdata(&dev->sbd);
9aea8cbf GU	304	priv = shost_priv(host);
	305	cmd = priv->curr_cmd;
	306
	307	if (!status) {
	308	/* OK, completed */
	309	if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
944cf8b4 FT	310	int len;
	311
	312	len = scsi_sg_copy_from_buffer(cmd,
	313	dev->bounce_buf,
	314	dev->bounce_size);
	315
	316	scsi_set_resid(cmd, scsi_bufflen(cmd) - len);
9aea8cbf GU	317	}
	318	cmd->result = DID_OK << 16;
	319	goto done;
	320	}
	321
	322	if (cmd->cmnd[0] == REQUEST_SENSE) {
	323	/* SCSI spec says request sense should never get error */
	324	dev_err(&dev->sbd.core, "%s:%u: end error without autosense\n",
	325	__func__, __LINE__);
	326	cmd->result = DID_ERROR << 16 \| SAM_STAT_CHECK_CONDITION;
	327	goto done;
	328	}
	329
	330	if (decode_lv1_status(status, &sense_key, &asc, &ascq)) {
	331	cmd->result = DID_ERROR << 16;
	332	goto done;
	333	}
	334
53df8ba8	335	scsi_build_sense_buffer(0, cmd->sense_buffer, sense_key, asc, ascq);
9aea8cbf GU	336	cmd->result = SAM_STAT_CHECK_CONDITION;
	337
	338	done:
	339	priv->curr_cmd = NULL;
	340	cmd->scsi_done(cmd);
	341	return IRQ_HANDLED;
	342	}
	343
	344	static struct scsi_host_template ps3rom_host_template = {
	345	.name = DEVICE_NAME,
	346	.slave_configure = ps3rom_slave_configure,
	347	.queuecommand = ps3rom_queuecommand,
	348	.can_queue = 1,
	349	.this_id = 7,
	350	.sg_tablesize = SG_ALL,
	351	.cmd_per_lun = 1,
	352	.emulated = 1, /* only sg driver uses this */
	353	.max_sectors = PS3ROM_MAX_SECTORS,
944cf8b4	354	.use_clustering = ENABLE_CLUSTERING,
9aea8cbf GU	355	.module = THIS_MODULE,
	356	};
	357
	358
	359	static int __devinit ps3rom_probe(struct ps3_system_bus_device *_dev)
	360	{
	361	struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
	362	int error;
	363	struct Scsi_Host *host;
	364	struct ps3rom_private *priv;
	365
	366	if (dev->blk_size != CD_FRAMESIZE) {
	367	dev_err(&dev->sbd.core,
7ad489e3	368	"%s:%u: cannot handle block size %llu\n", __func__,
9aea8cbf GU	369	__LINE__, dev->blk_size);
	370	return -EINVAL;
	371	}
	372
	373	dev->bounce_size = BOUNCE_SIZE;
	374	dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA);
	375	if (!dev->bounce_buf)
	376	return -ENOMEM;
	377
	378	error = ps3stor_setup(dev, ps3rom_interrupt);
	379	if (error)
	380	goto fail_free_bounce;
	381
	382	host = scsi_host_alloc(&ps3rom_host_template,
	383	sizeof(struct ps3rom_private));
	384	if (!host) {
	385	dev_err(&dev->sbd.core, "%s:%u: scsi_host_alloc failed\n",
	386	__func__, __LINE__);
	387	goto fail_teardown;
	388	}
	389
	390	priv = shost_priv(host);
c4b512bc	391	ps3_system_bus_set_drvdata(&dev->sbd, host);
9aea8cbf GU	392	priv->dev = dev;
	393
	394	/* One device/LUN per SCSI bus */
	395	host->max_id = 1;
	396	host->max_lun = 1;
	397
	398	error = scsi_add_host(host, &dev->sbd.core);
	399	if (error) {
	400	dev_err(&dev->sbd.core, "%s:%u: scsi_host_alloc failed %d\n",
	401	__func__, __LINE__, error);
	402	error = -ENODEV;
	403	goto fail_host_put;
	404	}
	405
	406	scsi_scan_host(host);
	407	return 0;
	408
	409	fail_host_put:
	410	scsi_host_put(host);
c4b512bc	411	ps3_system_bus_set_drvdata(&dev->sbd, NULL);
9aea8cbf GU	412	fail_teardown:
	413	ps3stor_teardown(dev);
	414	fail_free_bounce:
	415	kfree(dev->bounce_buf);
	416	return error;
	417	}
	418
	419	static int ps3rom_remove(struct ps3_system_bus_device *_dev)
	420	{
	421	struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
c4b512bc	422	struct Scsi_Host *host = ps3_system_bus_get_drvdata(&dev->sbd);
9aea8cbf GU	423
	424	scsi_remove_host(host);
	425	ps3stor_teardown(dev);
	426	scsi_host_put(host);
c4b512bc	427	ps3_system_bus_set_drvdata(&dev->sbd, NULL);
9aea8cbf GU	428	kfree(dev->bounce_buf);
	429	return 0;
	430	}
	431
	432	static struct ps3_system_bus_driver ps3rom = {
	433	.match_id = PS3_MATCH_ID_STOR_ROM,
	434	.core.name = DEVICE_NAME,
	435	.core.owner = THIS_MODULE,
	436	.probe = ps3rom_probe,
	437	.remove = ps3rom_remove
	438	};
	439
	440
	441	static int __init ps3rom_init(void)
	442	{
	443	return ps3_system_bus_driver_register(&ps3rom);
	444	}
	445
	446	static void __exit ps3rom_exit(void)
	447	{
	448	ps3_system_bus_driver_unregister(&ps3rom);
	449	}
	450
	451	module_init(ps3rom_init);
	452	module_exit(ps3rom_exit);
	453
	454	MODULE_LICENSE("GPL");
	455	MODULE_DESCRIPTION("PS3 BD/DVD/CD-ROM Storage Driver");
	456	MODULE_AUTHOR("Sony Corporation");
	457	MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_ROM);