[mirror_ubuntu-artful-kernel.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 <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 = dev->sbd.core.driver_data;
	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);
	dev->sbd.core.driver_data = 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);
	dev->sbd.core.driver_data = 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 = dev->sbd.core.driver_data;

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