[mirror_ubuntu-bionic-kernel.git] / include / scsi / scsi_cmnd.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _SCSI_SCSI_CMND_H
#define _SCSI_SCSI_CMND_H

#include <linux/dma-mapping.h>
#include <linux/blkdev.h>
#include <linux/list.h>
#include <linux/types.h>
#include <linux/timer.h>
#include <linux/scatterlist.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_request.h>

struct Scsi_Host;
struct scsi_driver;

#include <scsi/scsi_device.h>

/*
 * MAX_COMMAND_SIZE is:
 * The longest fixed-length SCSI CDB as per the SCSI standard.
 * fixed-length means: commands that their size can be determined
 * by their opcode and the CDB does not carry a length specifier, (unlike
 * the VARIABLE_LENGTH_CMD(0x7f) command). This is actually not exactly
 * true and the SCSI standard also defines extended commands and
 * vendor specific commands that can be bigger than 16 bytes. The kernel
 * will support these using the same infrastructure used for VARLEN CDB's.
 * So in effect MAX_COMMAND_SIZE means the maximum size command scsi-ml
 * supports without specifying a cmd_len by ULD's
 */
#define MAX_COMMAND_SIZE 16
#if (MAX_COMMAND_SIZE > BLK_MAX_CDB)
# error MAX_COMMAND_SIZE can not be bigger than BLK_MAX_CDB
#endif

struct scsi_data_buffer {
	struct sg_table table;
	unsigned length;
	int resid;
};

/* embedded in scsi_cmnd */
struct scsi_pointer {
	char *ptr;		/* data pointer */
	int this_residual;	/* left in this buffer */
	struct scatterlist *buffer;	/* which buffer */
	int buffers_residual;	/* how many buffers left */

        dma_addr_t dma_handle;

	volatile int Status;
	volatile int Message;
	volatile int have_data_in;
	volatile int sent_command;
	volatile int phase;
};

/* for scmd->flags */
#define SCMD_TAGGED		(1 << 0)
#define SCMD_UNCHECKED_ISA_DMA	(1 << 1)
#define SCMD_ZONE_WRITE_LOCK	(1 << 2)
#define SCMD_INITIALIZED	(1 << 3)
/* flags preserved across unprep / reprep */
#define SCMD_PRESERVED_FLAGS	(SCMD_UNCHECKED_ISA_DMA | SCMD_INITIALIZED)

struct scsi_cmnd {
	struct scsi_request req;
	struct scsi_device *device;
	struct list_head list;  /* scsi_cmnd participates in queue lists */
	struct list_head eh_entry; /* entry for the host eh_cmd_q */
	struct delayed_work abort_work;
	int eh_eflags;		/* Used by error handlr */

	/*
	 * A SCSI Command is assigned a nonzero serial_number before passed
	 * to the driver's queue command function.  The serial_number is
	 * cleared when scsi_done is entered indicating that the command
	 * has been completed.  It is a bug for LLDDs to use this number
	 * for purposes other than printk (and even that is only useful
	 * for debugging).
	 */
	unsigned long serial_number;

	/*
	 * This is set to jiffies as it was when the command was first
	 * allocated.  It is used to time how long the command has
	 * been outstanding
	 */
	unsigned long jiffies_at_alloc;

	int retries;
	int allowed;

	unsigned char prot_op;
	unsigned char prot_type;
	unsigned char prot_flags;

	unsigned short cmd_len;
	enum dma_data_direction sc_data_direction;

	/* These elements define the operation we are about to perform */
	unsigned char *cmnd;


	/* These elements define the operation we ultimately want to perform */
	struct scsi_data_buffer sdb;
	struct scsi_data_buffer *prot_sdb;

	unsigned underflow;	/* Return error if less than
				   this amount is transferred */

	unsigned transfersize;	/* How much we are guaranteed to
				   transfer with each SCSI transfer
				   (ie, between disconnect / 
				   reconnects.   Probably == sector
				   size */

	struct request *request;	/* The command we are
				   	   working on */

#define SCSI_SENSE_BUFFERSIZE 	96
	unsigned char *sense_buffer;
				/* obtained by REQUEST SENSE when
				 * CHECK CONDITION is received on original
				 * command (auto-sense) */

	/* Low-level done function - can be used by low-level driver to point
	 *        to completion function.  Not used by mid/upper level code. */
	void (*scsi_done) (struct scsi_cmnd *);

	/*
	 * The following fields can be written to by the host specific code. 
	 * Everything else should be left alone. 
	 */
	struct scsi_pointer SCp;	/* Scratchpad used by some host adapters */

	unsigned char *host_scribble;	/* The host adapter is allowed to
					 * call scsi_malloc and get some memory
					 * and hang it here.  The host adapter
					 * is also expected to call scsi_free
					 * to release this memory.  (The memory
					 * obtained by scsi_malloc is guaranteed
					 * to be at an address < 16Mb). */

	int result;		/* Status code from lower level driver */
	int flags;		/* Command flags */

	unsigned char tag;	/* SCSI-II queued command tag */
};

/*
 * Return the driver private allocation behind the command.
 * Only works if cmd_size is set in the host template.
 */
static inline void *scsi_cmd_priv(struct scsi_cmnd *cmd)
{
	return cmd + 1;
}

/* make sure not to use it with passthrough commands */
static inline struct scsi_driver *scsi_cmd_to_driver(struct scsi_cmnd *cmd)
{
	return *(struct scsi_driver **)cmd->request->rq_disk->private_data;
}

extern void scsi_put_command(struct scsi_cmnd *);
extern void scsi_finish_command(struct scsi_cmnd *cmd);

extern void *scsi_kmap_atomic_sg(struct scatterlist *sg, int sg_count,
				 size_t *offset, size_t *len);
extern void scsi_kunmap_atomic_sg(void *virt);

extern int scsi_init_io(struct scsi_cmnd *cmd);
extern void scsi_initialize_rq(struct request *rq);

extern int scsi_dma_map(struct scsi_cmnd *cmd);
extern void scsi_dma_unmap(struct scsi_cmnd *cmd);

static inline unsigned scsi_sg_count(struct scsi_cmnd *cmd)
{
	return cmd->sdb.table.nents;
}

static inline struct scatterlist *scsi_sglist(struct scsi_cmnd *cmd)
{
	return cmd->sdb.table.sgl;
}

static inline unsigned scsi_bufflen(struct scsi_cmnd *cmd)
{
	return cmd->sdb.length;
}

static inline void scsi_set_resid(struct scsi_cmnd *cmd, int resid)
{
	cmd->sdb.resid = resid;
}

static inline int scsi_get_resid(struct scsi_cmnd *cmd)
{
	return cmd->sdb.resid;
}

#define scsi_for_each_sg(cmd, sg, nseg, __i)			\
	for_each_sg(scsi_sglist(cmd), sg, nseg, __i)

static inline int scsi_bidi_cmnd(struct scsi_cmnd *cmd)
{
	return blk_bidi_rq(cmd->request) &&
		(cmd->request->next_rq->special != NULL);
}

static inline struct scsi_data_buffer *scsi_in(struct scsi_cmnd *cmd)
{
	return scsi_bidi_cmnd(cmd) ?
		cmd->request->next_rq->special : &cmd->sdb;
}

static inline struct scsi_data_buffer *scsi_out(struct scsi_cmnd *cmd)
{
	return &cmd->sdb;
}

static inline int scsi_sg_copy_from_buffer(struct scsi_cmnd *cmd,
					   void *buf, int buflen)
{
	return sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
				   buf, buflen);
}

static inline int scsi_sg_copy_to_buffer(struct scsi_cmnd *cmd,
					 void *buf, int buflen)
{
	return sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
				 buf, buflen);
}

/*
 * The operations below are hints that tell the controller driver how
 * to handle I/Os with DIF or similar types of protection information.
 */
enum scsi_prot_operations {
	/* Normal I/O */
	SCSI_PROT_NORMAL = 0,

	/* OS-HBA: Protected, HBA-Target: Unprotected */
	SCSI_PROT_READ_INSERT,
	SCSI_PROT_WRITE_STRIP,

	/* OS-HBA: Unprotected, HBA-Target: Protected */
	SCSI_PROT_READ_STRIP,
	SCSI_PROT_WRITE_INSERT,

	/* OS-HBA: Protected, HBA-Target: Protected */
	SCSI_PROT_READ_PASS,
	SCSI_PROT_WRITE_PASS,
};

static inline void scsi_set_prot_op(struct scsi_cmnd *scmd, unsigned char op)
{
	scmd->prot_op = op;
}

static inline unsigned char scsi_get_prot_op(struct scsi_cmnd *scmd)
{
	return scmd->prot_op;
}

enum scsi_prot_flags {
	SCSI_PROT_TRANSFER_PI		= 1 << 0,
	SCSI_PROT_GUARD_CHECK		= 1 << 1,
	SCSI_PROT_REF_CHECK		= 1 << 2,
	SCSI_PROT_REF_INCREMENT		= 1 << 3,
	SCSI_PROT_IP_CHECKSUM		= 1 << 4,
};

/*
 * The controller usually does not know anything about the target it
 * is communicating with.  However, when DIX is enabled the controller
 * must be know target type so it can verify the protection
 * information passed along with the I/O.
 */
enum scsi_prot_target_type {
	SCSI_PROT_DIF_TYPE0 = 0,
	SCSI_PROT_DIF_TYPE1,
	SCSI_PROT_DIF_TYPE2,
	SCSI_PROT_DIF_TYPE3,
};

static inline void scsi_set_prot_type(struct scsi_cmnd *scmd, unsigned char type)
{
	scmd->prot_type = type;
}

static inline unsigned char scsi_get_prot_type(struct scsi_cmnd *scmd)
{
	return scmd->prot_type;
}

static inline sector_t scsi_get_lba(struct scsi_cmnd *scmd)
{
	return blk_rq_pos(scmd->request);
}

static inline unsigned int scsi_prot_interval(struct scsi_cmnd *scmd)
{
	return scmd->device->sector_size;
}

static inline u32 scsi_prot_ref_tag(struct scsi_cmnd *scmd)
{
	return blk_rq_pos(scmd->request) >>
		(ilog2(scsi_prot_interval(scmd)) - 9) & 0xffffffff;
}

static inline unsigned scsi_prot_sg_count(struct scsi_cmnd *cmd)
{
	return cmd->prot_sdb ? cmd->prot_sdb->table.nents : 0;
}

static inline struct scatterlist *scsi_prot_sglist(struct scsi_cmnd *cmd)
{
	return cmd->prot_sdb ? cmd->prot_sdb->table.sgl : NULL;
}

static inline struct scsi_data_buffer *scsi_prot(struct scsi_cmnd *cmd)
{
	return cmd->prot_sdb;
}

#define scsi_for_each_prot_sg(cmd, sg, nseg, __i)		\
	for_each_sg(scsi_prot_sglist(cmd), sg, nseg, __i)

static inline void set_msg_byte(struct scsi_cmnd *cmd, char status)
{
	cmd->result = (cmd->result & 0xffff00ff) | (status << 8);
}

static inline void set_host_byte(struct scsi_cmnd *cmd, char status)
{
	cmd->result = (cmd->result & 0xff00ffff) | (status << 16);
}

static inline void set_driver_byte(struct scsi_cmnd *cmd, char status)
{
	cmd->result = (cmd->result & 0x00ffffff) | (status << 24);
}

static inline unsigned scsi_transfer_length(struct scsi_cmnd *scmd)
{
	unsigned int xfer_len = scsi_out(scmd)->length;
	unsigned int prot_interval = scsi_prot_interval(scmd);

	if (scmd->prot_flags & SCSI_PROT_TRANSFER_PI)
		xfer_len += (xfer_len >> ilog2(prot_interval)) * 8;

	return xfer_len;
}

#endif /* _SCSI_SCSI_CMND_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	#ifndef _SCSI_SCSI_CMND_H
	3	#define _SCSI_SCSI_CMND_H
	4
	5	#include <linux/dma-mapping.h>
6f9a35e2	6	#include <linux/blkdev.h>
1da177e4 LT	7	#include <linux/list.h>
1da177e4 LT	8	#include <linux/types.h>
4e57b681	9	#include <linux/timer.h>
c6132da1	10	#include <linux/scatterlist.h>
8846bab1	11	#include <scsi/scsi_device.h>
82ed4db4	12	#include <scsi/scsi_request.h>
1da177e4	13
b58d9154	14	struct Scsi_Host;
18a4d0a2	15	struct scsi_driver;
1da177e4	16
c611529e MP	17	#include <scsi/scsi_device.h>
c611529e MP	18
64a87b24 BH	19	/*
	20	* MAX_COMMAND_SIZE is:
	21	* The longest fixed-length SCSI CDB as per the SCSI standard.
	22	* fixed-length means: commands that their size can be determined
	23	* by their opcode and the CDB does not carry a length specifier, (unlike
	24	* the VARIABLE_LENGTH_CMD(0x7f) command). This is actually not exactly
	25	* true and the SCSI standard also defines extended commands and
	26	* vendor specific commands that can be bigger than 16 bytes. The kernel
	27	* will support these using the same infrastructure used for VARLEN CDB's.
	28	* So in effect MAX_COMMAND_SIZE means the maximum size command scsi-ml
	29	* supports without specifying a cmd_len by ULD's
	30	*/
	31	#define MAX_COMMAND_SIZE 16
	32	#if (MAX_COMMAND_SIZE > BLK_MAX_CDB)
	33	# error MAX_COMMAND_SIZE can not be bigger than BLK_MAX_CDB
	34	#endif
	35
30b0c37b BH	36	struct scsi_data_buffer {
	37	struct sg_table table;
	38	unsigned length;
	39	int resid;
	40	};
1da177e4 LT	41
	42	/* embedded in scsi_cmnd */
	43	struct scsi_pointer {
	44	char ptr; / data pointer */
	45	int this_residual; /* left in this buffer */
	46	struct scatterlist buffer; / which buffer */
	47	int buffers_residual; /* how many buffers left */
	48
	49	dma_addr_t dma_handle;
	50
	51	volatile int Status;
	52	volatile int Message;
	53	volatile int have_data_in;
	54	volatile int sent_command;
	55	volatile int phase;
	56	};
	57
125c99bc CH	58	/* for scmd->flags */
125c99bc CH	59	#define SCMD_TAGGED (1 << 0)
8e688254	60	#define SCMD_UNCHECKED_ISA_DMA (1 << 1)
70e42fd0	61	#define SCMD_ZONE_WRITE_LOCK (1 << 2)
64104f70 BVA	62	#define SCMD_INITIALIZED (1 << 3)
	63	/* flags preserved across unprep / reprep */
	64	#define SCMD_PRESERVED_FLAGS (SCMD_UNCHECKED_ISA_DMA \| SCMD_INITIALIZED)
125c99bc	65
1da177e4	66	struct scsi_cmnd {
82ed4db4	67	struct scsi_request req;
1da177e4	68	struct scsi_device *device;
1da177e4	69	struct list_head list; /* scsi_cmnd participates in queue lists */
1da177e4	70	struct list_head eh_entry; /* entry for the host eh_cmd_q */
e494f6a7	71	struct delayed_work abort_work;
1da177e4	72	int eh_eflags; /* Used by error handlr */
1da177e4 LT	73
1da177e4 LT	74	/*
c6295cdf TH	75	* A SCSI Command is assigned a nonzero serial_number before passed
	76	* to the driver's queue command function. The serial_number is
	77	* cleared when scsi_done is entered indicating that the command
12a44162 MW	78	* has been completed. It is a bug for LLDDs to use this number
	79	* for purposes other than printk (and even that is only useful
	80	* for debugging).
1da177e4 LT	81	*/
1da177e4 LT	82	unsigned long serial_number;
12a44162	83
b21a4138 JB	84	/*
	85	* This is set to jiffies as it was when the command was first
	86	* allocated. It is used to time how long the command has
	87	* been outstanding
	88	*/
	89	unsigned long jiffies_at_alloc;
1da177e4 LT	90
	91	int retries;
	92	int allowed;
1da177e4	93
db007fc5 MP	94	unsigned char prot_op;
db007fc5 MP	95	unsigned char prot_type;
c611529e	96	unsigned char prot_flags;
db007fc5	97
db4742dd	98	unsigned short cmd_len;
1da177e4	99	enum dma_data_direction sc_data_direction;
1da177e4 LT	100
1da177e4 LT	101	/* These elements define the operation we are about to perform */
64a87b24	102	unsigned char *cmnd;
1da177e4	103
1da177e4 LT	104
1da177e4 LT	105	/* These elements define the operation we ultimately want to perform */
30b0c37b	106	struct scsi_data_buffer sdb;
7027ad72 MP	107	struct scsi_data_buffer *prot_sdb;
7027ad72 MP	108
1da177e4 LT	109	unsigned underflow; /* Return error if less than
1da177e4 LT	110	this amount is transferred */
1da177e4 LT	111
	112	unsigned transfersize; /* How much we are guaranteed to
	113	transfer with each SCSI transfer
	114	(ie, between disconnect /
	115	reconnects. Probably == sector
	116	size */
	117
1da177e4 LT	118	struct request request; / The command we are
	119	working on */
	120
	121	#define SCSI_SENSE_BUFFERSIZE 96
de25deb1	122	unsigned char *sense_buffer;
c67a848c MW	123	/* obtained by REQUEST SENSE when
	124	* CHECK CONDITION is received on original
	125	* command (auto-sense) */
1da177e4 LT	126
	127	/* Low-level done function - can be used by low-level driver to point
	128	* to completion function. Not used by mid/upper level code. */
	129	void (scsi_done) (struct scsi_cmnd );
	130
	131	/*
	132	* The following fields can be written to by the host specific code.
	133	* Everything else should be left alone.
	134	*/
	135	struct scsi_pointer SCp; /* Scratchpad used by some host adapters */
	136
	137	unsigned char host_scribble; / The host adapter is allowed to
c67a848c MW	138	* call scsi_malloc and get some memory
	139	* and hang it here. The host adapter
	140	* is also expected to call scsi_free
	141	* to release this memory. (The memory
	142	* obtained by scsi_malloc is guaranteed
	143	* to be at an address < 16Mb). */
1da177e4 LT	144
1da177e4 LT	145	int result; /* Status code from lower level driver */
125c99bc	146	int flags; /* Command flags */
1da177e4 LT	147
1da177e4 LT	148	unsigned char tag; /* SCSI-II queued command tag */
1da177e4 LT	149	};
1da177e4 LT	150
b54197c4 CH	151	/*
	152	* Return the driver private allocation behind the command.
	153	* Only works if cmd_size is set in the host template.
	154	*/
	155	static inline void scsi_cmd_priv(struct scsi_cmnd cmd)
	156	{
	157	return cmd + 1;
	158	}
	159
57292b58	160	/* make sure not to use it with passthrough commands */
18a4d0a2 MP	161	static inline struct scsi_driver scsi_cmd_to_driver(struct scsi_cmnd cmd)
18a4d0a2 MP	162	{
329a402c	163	return (struct scsi_driver *)cmd->request->rq_disk->private_data;
18a4d0a2 MP	164	}
18a4d0a2 MP	165
1da177e4	166	extern void scsi_put_command(struct scsi_cmnd *);
1da177e4 LT	167	extern void scsi_finish_command(struct scsi_cmnd *cmd);
1da177e4 LT	168
cdb8c2a6 GL	169	extern void scsi_kmap_atomic_sg(struct scatterlist sg, int sg_count,
	170	size_t offset, size_t len);
	171	extern void scsi_kunmap_atomic_sg(void *virt);
	172
3c356bde	173	extern int scsi_init_io(struct scsi_cmnd *cmd);
ca18d6f7	174	extern void scsi_initialize_rq(struct request *rq);
b58d9154	175
824d7b57 FT	176	extern int scsi_dma_map(struct scsi_cmnd *cmd);
	177	extern void scsi_dma_unmap(struct scsi_cmnd *cmd);
	178
30b0c37b BH	179	static inline unsigned scsi_sg_count(struct scsi_cmnd *cmd)
	180	{
	181	return cmd->sdb.table.nents;
	182	}
	183
	184	static inline struct scatterlist scsi_sglist(struct scsi_cmnd cmd)
	185	{
	186	return cmd->sdb.table.sgl;
	187	}
	188
	189	static inline unsigned scsi_bufflen(struct scsi_cmnd *cmd)
	190	{
	191	return cmd->sdb.length;
	192	}
824d7b57 FT	193
	194	static inline void scsi_set_resid(struct scsi_cmnd *cmd, int resid)
	195	{
30b0c37b	196	cmd->sdb.resid = resid;
824d7b57 FT	197	}
	198
	199	static inline int scsi_get_resid(struct scsi_cmnd *cmd)
	200	{
30b0c37b	201	return cmd->sdb.resid;
824d7b57 FT	202	}
	203
	204	#define scsi_for_each_sg(cmd, sg, nseg, __i) \
c6132da1	205	for_each_sg(scsi_sglist(cmd), sg, nseg, __i)
824d7b57	206
6f9a35e2 BH	207	static inline int scsi_bidi_cmnd(struct scsi_cmnd *cmd)
	208	{
	209	return blk_bidi_rq(cmd->request) &&
	210	(cmd->request->next_rq->special != NULL);
	211	}
	212
	213	static inline struct scsi_data_buffer scsi_in(struct scsi_cmnd cmd)
	214	{
	215	return scsi_bidi_cmnd(cmd) ?
	216	cmd->request->next_rq->special : &cmd->sdb;
	217	}
	218
	219	static inline struct scsi_data_buffer scsi_out(struct scsi_cmnd cmd)
	220	{
	221	return &cmd->sdb;
	222	}
	223
9ac16b61 FT	224	static inline int scsi_sg_copy_from_buffer(struct scsi_cmnd *cmd,
	225	void *buf, int buflen)
	226	{
	227	return sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
	228	buf, buflen);
	229	}
	230
	231	static inline int scsi_sg_copy_to_buffer(struct scsi_cmnd *cmd,
	232	void *buf, int buflen)
	233	{
	234	return sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
	235	buf, buflen);
	236	}
	237
db007fc5 MP	238	/*
	239	* The operations below are hints that tell the controller driver how
	240	* to handle I/Os with DIF or similar types of protection information.
	241	*/
	242	enum scsi_prot_operations {
	243	/* Normal I/O */
	244	SCSI_PROT_NORMAL = 0,
	245
	246	/* OS-HBA: Protected, HBA-Target: Unprotected */
	247	SCSI_PROT_READ_INSERT,
	248	SCSI_PROT_WRITE_STRIP,
	249
	250	/* OS-HBA: Unprotected, HBA-Target: Protected */
	251	SCSI_PROT_READ_STRIP,
	252	SCSI_PROT_WRITE_INSERT,
	253
	254	/* OS-HBA: Protected, HBA-Target: Protected */
	255	SCSI_PROT_READ_PASS,
	256	SCSI_PROT_WRITE_PASS,
db007fc5 MP	257	};
	258
	259	static inline void scsi_set_prot_op(struct scsi_cmnd *scmd, unsigned char op)
	260	{
	261	scmd->prot_op = op;
	262	}
	263
	264	static inline unsigned char scsi_get_prot_op(struct scsi_cmnd *scmd)
	265	{
	266	return scmd->prot_op;
	267	}
	268
c611529e MP	269	enum scsi_prot_flags {
	270	SCSI_PROT_TRANSFER_PI = 1 << 0,
	271	SCSI_PROT_GUARD_CHECK = 1 << 1,
	272	SCSI_PROT_REF_CHECK = 1 << 2,
	273	SCSI_PROT_REF_INCREMENT = 1 << 3,
	274	SCSI_PROT_IP_CHECKSUM = 1 << 4,
	275	};
	276
db007fc5 MP	277	/*
	278	* The controller usually does not know anything about the target it
	279	* is communicating with. However, when DIX is enabled the controller
	280	* must be know target type so it can verify the protection
	281	* information passed along with the I/O.
	282	*/
	283	enum scsi_prot_target_type {
	284	SCSI_PROT_DIF_TYPE0 = 0,
	285	SCSI_PROT_DIF_TYPE1,
	286	SCSI_PROT_DIF_TYPE2,
	287	SCSI_PROT_DIF_TYPE3,
	288	};
	289
	290	static inline void scsi_set_prot_type(struct scsi_cmnd *scmd, unsigned char type)
	291	{
	292	scmd->prot_type = type;
	293	}
	294
	295	static inline unsigned char scsi_get_prot_type(struct scsi_cmnd *scmd)
	296	{
	297	return scmd->prot_type;
	298	}
	299
	300	static inline sector_t scsi_get_lba(struct scsi_cmnd *scmd)
	301	{
83096ebf	302	return blk_rq_pos(scmd->request);
db007fc5 MP	303	}
db007fc5 MP	304
c611529e MP	305	static inline unsigned int scsi_prot_interval(struct scsi_cmnd *scmd)
	306	{
	307	return scmd->device->sector_size;
	308	}
	309
	310	static inline u32 scsi_prot_ref_tag(struct scsi_cmnd *scmd)
	311	{
	312	return blk_rq_pos(scmd->request) >>
	313	(ilog2(scsi_prot_interval(scmd)) - 9) & 0xffffffff;
	314	}
	315
7027ad72 MP	316	static inline unsigned scsi_prot_sg_count(struct scsi_cmnd *cmd)
	317	{
	318	return cmd->prot_sdb ? cmd->prot_sdb->table.nents : 0;
	319	}
	320
	321	static inline struct scatterlist scsi_prot_sglist(struct scsi_cmnd cmd)
	322	{
	323	return cmd->prot_sdb ? cmd->prot_sdb->table.sgl : NULL;
	324	}
	325
	326	static inline struct scsi_data_buffer scsi_prot(struct scsi_cmnd cmd)
	327	{
	328	return cmd->prot_sdb;
	329	}
	330
	331	#define scsi_for_each_prot_sg(cmd, sg, nseg, __i) \
	332	for_each_sg(scsi_prot_sglist(cmd), sg, nseg, __i)
	333
f290f197 JB	334	static inline void set_msg_byte(struct scsi_cmnd *cmd, char status)
f290f197 JB	335	{
3384db9e	336	cmd->result = (cmd->result & 0xffff00ff) \| (status << 8);
f290f197 JB	337	}
	338
	339	static inline void set_host_byte(struct scsi_cmnd *cmd, char status)
	340	{
3384db9e	341	cmd->result = (cmd->result & 0xff00ffff) \| (status << 16);
f290f197 JB	342	}
	343
	344	static inline void set_driver_byte(struct scsi_cmnd *cmd, char status)
	345	{
3384db9e	346	cmd->result = (cmd->result & 0x00ffffff) \| (status << 24);
f290f197 JB	347	}
f290f197 JB	348
8846bab1 SG	349	static inline unsigned scsi_transfer_length(struct scsi_cmnd *scmd)
8846bab1 SG	350	{
5616b0a4	351	unsigned int xfer_len = scsi_out(scmd)->length;
c611529e	352	unsigned int prot_interval = scsi_prot_interval(scmd);
8846bab1	353
c611529e MP	354	if (scmd->prot_flags & SCSI_PROT_TRANSFER_PI)
c611529e MP	355	xfer_len += (xfer_len >> ilog2(prot_interval)) * 8;
8846bab1	356
c611529e	357	return xfer_len;
8846bab1 SG	358	}
8846bab1 SG	359
1da177e4	360	#endif /* _SCSI_SCSI_CMND_H */