[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/module.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_lck(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 DEF_SCSI_QCMD(ps3rom_queuecommand)

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>
acf3368f	23	#include <linux/module.h>
5a0e3ad6	24	#include <linux/slab.h>
9aea8cbf GU	25
	26	#include <scsi/scsi.h>
	27	#include <scsi/scsi_cmnd.h>
	28	#include <scsi/scsi_dbg.h>
	29	#include <scsi/scsi_device.h>
	30	#include <scsi/scsi_host.h>
53df8ba8	31	#include <scsi/scsi_eh.h>
9aea8cbf GU	32
	33	#include <asm/lv1call.h>
	34	#include <asm/ps3stor.h>
	35
	36
	37	#define DEVICE_NAME "ps3rom"
	38
	39	#define BOUNCE_SIZE (64*1024)
	40
51883b5e	41	#define PS3ROM_MAX_SECTORS (BOUNCE_SIZE >> 9)
9aea8cbf GU	42
	43
	44	struct ps3rom_private {
	45	struct ps3_storage_device *dev;
	46	struct scsi_cmnd *curr_cmd;
	47	};
	48
	49
	50	#define LV1_STORAGE_SEND_ATAPI_COMMAND (1)
	51
	52	struct lv1_atapi_cmnd_block {
	53	u8 pkt[32]; /* packet command block */
	54	u32 pktlen; /* should be 12 for ATAPI 8020 */
	55	u32 blocks;
	56	u32 block_size;
	57	u32 proto; /* transfer mode */
	58	u32 in_out; /* transfer direction */
	59	u64 buffer; /* parameter except command block */
	60	u32 arglen; /* length above */
	61	};
	62
	63	enum lv1_atapi_proto {
	64	NON_DATA_PROTO = 0,
	65	PIO_DATA_IN_PROTO = 1,
	66	PIO_DATA_OUT_PROTO = 2,
	67	DMA_PROTO = 3
	68	};
	69
	70	enum lv1_atapi_in_out {
	71	DIR_WRITE = 0, /* memory -> device */
	72	DIR_READ = 1 /* device -> memory */
	73	};
	74
	75
	76	static int ps3rom_slave_configure(struct scsi_device *scsi_dev)
	77	{
	78	struct ps3rom_private *priv = shost_priv(scsi_dev->host);
	79	struct ps3_storage_device *dev = priv->dev;
	80
	81	dev_dbg(&dev->sbd.core, "%s:%u: id %u, lun %u, channel %u\n", __func__,
	82	__LINE__, scsi_dev->id, scsi_dev->lun, scsi_dev->channel);
	83
	84	/*
	85	* ATAPI SFF8020 devices use MODE_SENSE_10,
	86	* so we can prohibit MODE_SENSE_6
	87	*/
	88	scsi_dev->use_10_for_ms = 1;
	89
	90	/* we don't support {READ,WRITE}_6 */
	91	scsi_dev->use_10_for_rw = 1;
	92
	93	return 0;
	94	}
	95
9aea8cbf GU	96	static int ps3rom_atapi_request(struct ps3_storage_device *dev,
	97	struct scsi_cmnd *cmd)
	98	{
	99	struct lv1_atapi_cmnd_block atapi_cmnd;
	100	unsigned char opcode = cmd->cmnd[0];
	101	int res;
	102	u64 lpar;
	103
	104	dev_dbg(&dev->sbd.core, "%s:%u: send ATAPI command 0x%02x\n", __func__,
	105	__LINE__, opcode);
	106
	107	memset(&atapi_cmnd, 0, sizeof(struct lv1_atapi_cmnd_block));
	108	memcpy(&atapi_cmnd.pkt, cmd->cmnd, 12);
	109	atapi_cmnd.pktlen = 12;
	110	atapi_cmnd.block_size = 1; /* transfer size is block_size * blocks */
35814740	111	atapi_cmnd.blocks = atapi_cmnd.arglen = scsi_bufflen(cmd);
9aea8cbf GU	112	atapi_cmnd.buffer = dev->bounce_lpar;
	113
	114	switch (cmd->sc_data_direction) {
	115	case DMA_FROM_DEVICE:
35814740	116	if (scsi_bufflen(cmd) >= CD_FRAMESIZE)
9aea8cbf GU	117	atapi_cmnd.proto = DMA_PROTO;
	118	else
	119	atapi_cmnd.proto = PIO_DATA_IN_PROTO;
	120	atapi_cmnd.in_out = DIR_READ;
	121	break;
	122
	123	case DMA_TO_DEVICE:
35814740	124	if (scsi_bufflen(cmd) >= CD_FRAMESIZE)
9aea8cbf GU	125	atapi_cmnd.proto = DMA_PROTO;
	126	else
	127	atapi_cmnd.proto = PIO_DATA_OUT_PROTO;
	128	atapi_cmnd.in_out = DIR_WRITE;
944cf8b4	129	scsi_sg_copy_to_buffer(cmd, dev->bounce_buf, dev->bounce_size);
9aea8cbf GU	130	break;
	131
	132	default:
	133	atapi_cmnd.proto = NON_DATA_PROTO;
	134	break;
	135	}
	136
	137	lpar = ps3_mm_phys_to_lpar(__pa(&atapi_cmnd));
	138	res = lv1_storage_send_device_command(dev->sbd.dev_id,
	139	LV1_STORAGE_SEND_ATAPI_COMMAND,
	140	lpar, sizeof(atapi_cmnd),
	141	atapi_cmnd.buffer,
	142	atapi_cmnd.arglen, &dev->tag);
	143	if (res == LV1_DENIED_BY_POLICY) {
	144	dev_dbg(&dev->sbd.core,
	145	"%s:%u: ATAPI command 0x%02x denied by policy\n",
	146	__func__, __LINE__, opcode);
	147	return DID_ERROR << 16;
	148	}
	149
	150	if (res) {
	151	dev_err(&dev->sbd.core,
	152	"%s:%u: ATAPI command 0x%02x failed %d\n", __func__,
	153	__LINE__, opcode, res);
	154	return DID_ERROR << 16;
	155	}
	156
	157	return 0;
	158	}
	159
	160	static inline unsigned int srb10_lba(const struct scsi_cmnd *cmd)
	161	{
	162	return cmd->cmnd[2] << 24 \| cmd->cmnd[3] << 16 \| cmd->cmnd[4] << 8 \|
	163	cmd->cmnd[5];
	164	}
	165
	166	static inline unsigned int srb10_len(const struct scsi_cmnd *cmd)
	167	{
	168	return cmd->cmnd[7] << 8 \| cmd->cmnd[8];
	169	}
	170
	171	static int ps3rom_read_request(struct ps3_storage_device *dev,
	172	struct scsi_cmnd *cmd, u32 start_sector,
	173	u32 sectors)
	174	{
	175	int res;
	176
	177	dev_dbg(&dev->sbd.core, "%s:%u: read %u sectors starting at %u\n",
	178	__func__, __LINE__, sectors, start_sector);
	179
	180	res = lv1_storage_read(dev->sbd.dev_id,
	181	dev->regions[dev->region_idx].id, start_sector,
	182	sectors, 0, dev->bounce_lpar, &dev->tag);
	183	if (res) {
	184	dev_err(&dev->sbd.core, "%s:%u: read failed %d\n", __func__,
	185	__LINE__, res);
	186	return DID_ERROR << 16;
	187	}
	188
	189	return 0;
	190	}
	191
	192	static int ps3rom_write_request(struct ps3_storage_device *dev,
	193	struct scsi_cmnd *cmd, u32 start_sector,
194	u32 sectors)
195	{
196	int res;
197
198	dev_dbg(&dev->sbd.core, "%s:%u: write %u sectors starting at %u\n",
199	__func__, __LINE__, sectors, start_sector);
200
944cf8b4	201	scsi_sg_copy_to_buffer(cmd, dev->bounce_buf, dev->bounce_size);
9aea8cbf GU	202
	203	res = lv1_storage_write(dev->sbd.dev_id,
	204	dev->regions[dev->region_idx].id, start_sector,
	205	sectors, 0, dev->bounce_lpar, &dev->tag);
	206	if (res) {
	207	dev_err(&dev->sbd.core, "%s:%u: write failed %d\n", __func__,
	208	__LINE__, res);
	209	return DID_ERROR << 16;
	210	}
	211
	212	return 0;
	213	}
	214
f281233d	215	static int ps3rom_queuecommand_lck(struct scsi_cmnd *cmd,
9aea8cbf GU	216	void (done)(struct scsi_cmnd ))
	217	{
	218	struct ps3rom_private *priv = shost_priv(cmd->device->host);
	219	struct ps3_storage_device *dev = priv->dev;
	220	unsigned char opcode;
	221	int res;
	222
	223	#ifdef DEBUG
	224	scsi_print_command(cmd);
	225	#endif
	226
	227	priv->curr_cmd = cmd;
	228	cmd->scsi_done = done;
	229
	230	opcode = cmd->cmnd[0];
	231	/*
	232	* While we can submit READ/WRITE SCSI commands as ATAPI commands,
	233	* it's recommended for various reasons (performance, error handling,
	234	* ...) to use lv1_storage_{read,write}() instead
	235	*/
	236	switch (opcode) {
	237	case READ_10:
	238	res = ps3rom_read_request(dev, cmd, srb10_lba(cmd),
	239	srb10_len(cmd));
	240	break;
	241
	242	case WRITE_10:
	243	res = ps3rom_write_request(dev, cmd, srb10_lba(cmd),
	244	srb10_len(cmd));
	245	break;
	246
	247	default:
	248	res = ps3rom_atapi_request(dev, cmd);
	249	break;
	250	}
	251
	252	if (res) {
	253	memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
	254	cmd->result = res;
	255	cmd->sense_buffer[0] = 0x70;
	256	cmd->sense_buffer[2] = ILLEGAL_REQUEST;
	257	priv->curr_cmd = NULL;
	258	cmd->scsi_done(cmd);
	259	}
	260
	261	return 0;
	262	}
	263
f281233d JG	264	static DEF_SCSI_QCMD(ps3rom_queuecommand)
f281233d JG	265
9aea8cbf GU	266	static int decode_lv1_status(u64 status, unsigned char *sense_key,
	267	unsigned char asc, unsigned char ascq)
	268	{
	269	if (((status >> 24) & 0xff) != SAM_STAT_CHECK_CONDITION)
	270	return -1;
	271
	272	*sense_key = (status >> 16) & 0xff;
	273	*asc = (status >> 8) & 0xff;
	274	*ascq = status & 0xff;
	275	return 0;
	276	}
	277
	278	static irqreturn_t ps3rom_interrupt(int irq, void *data)
	279	{
	280	struct ps3_storage_device *dev = data;
	281	struct Scsi_Host *host;
	282	struct ps3rom_private *priv;
	283	struct scsi_cmnd *cmd;
	284	int res;
	285	u64 tag, status;
	286	unsigned char sense_key, asc, ascq;
	287
	288	res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status);
	289	/*
	290	* status = -1 may mean that ATAPI transport completed OK, but
	291	* ATAPI command itself resulted CHECK CONDITION
	292	* so, upper layer should issue REQUEST_SENSE to check the sense data
	293	*/
	294
	295	if (tag != dev->tag)
	296	dev_err(&dev->sbd.core,
7ad489e3	297	"%s:%u: tag mismatch, got %llx, expected %llx\n",
9aea8cbf GU	298	__func__, __LINE__, tag, dev->tag);
	299
	300	if (res) {
7ad489e3	301	dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%llx\n",
9aea8cbf GU	302	__func__, __LINE__, res, status);
	303	return IRQ_HANDLED;
	304	}
	305
c4b512bc	306	host = ps3_system_bus_get_drvdata(&dev->sbd);
9aea8cbf GU	307	priv = shost_priv(host);
	308	cmd = priv->curr_cmd;
	309
	310	if (!status) {
	311	/* OK, completed */
	312	if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
944cf8b4 FT	313	int len;
	314
	315	len = scsi_sg_copy_from_buffer(cmd,
	316	dev->bounce_buf,
	317	dev->bounce_size);
	318
	319	scsi_set_resid(cmd, scsi_bufflen(cmd) - len);
9aea8cbf GU	320	}
	321	cmd->result = DID_OK << 16;
	322	goto done;
	323	}
	324
	325	if (cmd->cmnd[0] == REQUEST_SENSE) {
	326	/* SCSI spec says request sense should never get error */
	327	dev_err(&dev->sbd.core, "%s:%u: end error without autosense\n",
	328	__func__, __LINE__);
	329	cmd->result = DID_ERROR << 16 \| SAM_STAT_CHECK_CONDITION;
	330	goto done;
	331	}
	332
	333	if (decode_lv1_status(status, &sense_key, &asc, &ascq)) {
	334	cmd->result = DID_ERROR << 16;
	335	goto done;
	336	}
	337
53df8ba8	338	scsi_build_sense_buffer(0, cmd->sense_buffer, sense_key, asc, ascq);
9aea8cbf GU	339	cmd->result = SAM_STAT_CHECK_CONDITION;
	340
	341	done:
	342	priv->curr_cmd = NULL;
	343	cmd->scsi_done(cmd);
	344	return IRQ_HANDLED;
	345	}
	346
	347	static struct scsi_host_template ps3rom_host_template = {
	348	.name = DEVICE_NAME,
	349	.slave_configure = ps3rom_slave_configure,
	350	.queuecommand = ps3rom_queuecommand,
	351	.can_queue = 1,
	352	.this_id = 7,
	353	.sg_tablesize = SG_ALL,
	354	.cmd_per_lun = 1,
	355	.emulated = 1, /* only sg driver uses this */
	356	.max_sectors = PS3ROM_MAX_SECTORS,
944cf8b4	357	.use_clustering = ENABLE_CLUSTERING,
9aea8cbf GU	358	.module = THIS_MODULE,
	359	};
	360
	361
	362	static int __devinit ps3rom_probe(struct ps3_system_bus_device *_dev)
	363	{
	364	struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
	365	int error;
	366	struct Scsi_Host *host;
	367	struct ps3rom_private *priv;
	368
	369	if (dev->blk_size != CD_FRAMESIZE) {
	370	dev_err(&dev->sbd.core,
7ad489e3	371	"%s:%u: cannot handle block size %llu\n", __func__,
9aea8cbf GU	372	__LINE__, dev->blk_size);
	373	return -EINVAL;
	374	}
	375
	376	dev->bounce_size = BOUNCE_SIZE;
	377	dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA);
	378	if (!dev->bounce_buf)
	379	return -ENOMEM;
	380
	381	error = ps3stor_setup(dev, ps3rom_interrupt);
	382	if (error)
	383	goto fail_free_bounce;
	384
	385	host = scsi_host_alloc(&ps3rom_host_template,
	386	sizeof(struct ps3rom_private));
	387	if (!host) {
	388	dev_err(&dev->sbd.core, "%s:%u: scsi_host_alloc failed\n",
	389	__func__, __LINE__);
	390	goto fail_teardown;
	391	}
	392
	393	priv = shost_priv(host);
c4b512bc	394	ps3_system_bus_set_drvdata(&dev->sbd, host);
9aea8cbf GU	395	priv->dev = dev;
	396
	397	/* One device/LUN per SCSI bus */
	398	host->max_id = 1;
	399	host->max_lun = 1;
	400
	401	error = scsi_add_host(host, &dev->sbd.core);
	402	if (error) {
	403	dev_err(&dev->sbd.core, "%s:%u: scsi_host_alloc failed %d\n",
	404	__func__, __LINE__, error);
	405	error = -ENODEV;
	406	goto fail_host_put;
	407	}
	408
	409	scsi_scan_host(host);
	410	return 0;
	411
	412	fail_host_put:
	413	scsi_host_put(host);
c4b512bc	414	ps3_system_bus_set_drvdata(&dev->sbd, NULL);
9aea8cbf GU	415	fail_teardown:
	416	ps3stor_teardown(dev);
	417	fail_free_bounce:
	418	kfree(dev->bounce_buf);
	419	return error;
	420	}
	421
	422	static int ps3rom_remove(struct ps3_system_bus_device *_dev)
	423	{
	424	struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
c4b512bc	425	struct Scsi_Host *host = ps3_system_bus_get_drvdata(&dev->sbd);
9aea8cbf GU	426
	427	scsi_remove_host(host);
	428	ps3stor_teardown(dev);
	429	scsi_host_put(host);
c4b512bc	430	ps3_system_bus_set_drvdata(&dev->sbd, NULL);
9aea8cbf GU	431	kfree(dev->bounce_buf);
	432	return 0;
	433	}
	434
	435	static struct ps3_system_bus_driver ps3rom = {
	436	.match_id = PS3_MATCH_ID_STOR_ROM,
	437	.core.name = DEVICE_NAME,
	438	.core.owner = THIS_MODULE,
	439	.probe = ps3rom_probe,
	440	.remove = ps3rom_remove
	441	};
	442
	443
	444	static int __init ps3rom_init(void)
	445	{
	446	return ps3_system_bus_driver_register(&ps3rom);
	447	}
	448
	449	static void __exit ps3rom_exit(void)
	450	{
	451	ps3_system_bus_driver_unregister(&ps3rom);
	452	}
	453
	454	module_init(ps3rom_init);
	455	module_exit(ps3rom_exit);
	456
	457	MODULE_LICENSE("GPL");
	458	MODULE_DESCRIPTION("PS3 BD/DVD/CD-ROM Storage Driver");
	459	MODULE_AUTHOR("Sony Corporation");
	460	MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_ROM);