[linux.git] / drivers / target / iscsi / iscsi_target_seq_pdu_list.h

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

#include <linux/types.h>
#include <linux/cache.h>

/* struct iscsi_pdu->status */
#define DATAOUT_PDU_SENT			1

/* struct iscsi_seq->type */
#define SEQTYPE_IMMEDIATE			1
#define SEQTYPE_UNSOLICITED			2
#define SEQTYPE_NORMAL				3

/* struct iscsi_seq->status */
#define DATAOUT_SEQUENCE_GOT_R2T		1
#define DATAOUT_SEQUENCE_WITHIN_COMMAND_RECOVERY 2
#define DATAOUT_SEQUENCE_COMPLETE		3

/* iscsi_determine_counts_for_list() type */
#define PDULIST_NORMAL				1
#define PDULIST_IMMEDIATE			2
#define PDULIST_UNSOLICITED			3
#define PDULIST_IMMEDIATE_AND_UNSOLICITED	4

/* struct iscsi_pdu->type */
#define PDUTYPE_IMMEDIATE			1
#define PDUTYPE_UNSOLICITED			2
#define PDUTYPE_NORMAL				3

/* struct iscsi_pdu->status */
#define ISCSI_PDU_NOT_RECEIVED			0
#define ISCSI_PDU_RECEIVED_OK			1
#define ISCSI_PDU_CRC_FAILED			2
#define ISCSI_PDU_TIMED_OUT			3

/* struct iscsi_build_list->randomize */
#define RANDOM_DATAIN_PDU_OFFSETS		0x01
#define RANDOM_DATAIN_SEQ_OFFSETS		0x02
#define RANDOM_DATAOUT_PDU_OFFSETS		0x04
#define RANDOM_R2T_OFFSETS			0x08

/* struct iscsi_build_list->data_direction */
#define ISCSI_PDU_READ				0x01
#define ISCSI_PDU_WRITE				0x02

struct iscsi_build_list {
	int		data_direction;
	int		randomize;
	int		type;
	int		immediate_data_length;
};

struct iscsi_pdu {
	int		status;
	int		type;
	u8		flags;
	u32		data_sn;
	u32		length;
	u32		offset;
	u32		pdu_send_order;
	u32		seq_no;
} ____cacheline_aligned;

struct iscsi_seq {
	int		sent;
	int		status;
	int		type;
	u32		data_sn;
	u32		first_datasn;
	u32		last_datasn;
	u32		next_burst_len;
	u32		pdu_start;
	u32		pdu_count;
	u32		offset;
	u32		orig_offset;
	u32		pdu_send_order;
	u32		r2t_sn;
	u32		seq_send_order;
	u32		seq_no;
	u32		xfer_len;
} ____cacheline_aligned;

struct iscsi_cmd;

extern int iscsit_build_pdu_and_seq_lists(struct iscsi_cmd *, u32);
extern struct iscsi_pdu *iscsit_get_pdu_holder(struct iscsi_cmd *, u32, u32);
extern struct iscsi_pdu *iscsit_get_pdu_holder_for_seq(struct iscsi_cmd *, struct iscsi_seq *);
extern struct iscsi_seq *iscsit_get_seq_holder(struct iscsi_cmd *, u32, u32);

#endif /* ISCSI_SEQ_AND_PDU_LIST_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
e48354ce NB	2	#ifndef ISCSI_SEQ_AND_PDU_LIST_H
	3	#define ISCSI_SEQ_AND_PDU_LIST_H
	4
8dcf07be BVA	5	#include <linux/types.h>
	6	#include <linux/cache.h>
	7
e48354ce NB	8	/* struct iscsi_pdu->status */
	9	#define DATAOUT_PDU_SENT 1
	10
	11	/* struct iscsi_seq->type */
	12	#define SEQTYPE_IMMEDIATE 1
	13	#define SEQTYPE_UNSOLICITED 2
	14	#define SEQTYPE_NORMAL 3
	15
	16	/* struct iscsi_seq->status */
	17	#define DATAOUT_SEQUENCE_GOT_R2T 1
	18	#define DATAOUT_SEQUENCE_WITHIN_COMMAND_RECOVERY 2
	19	#define DATAOUT_SEQUENCE_COMPLETE 3
	20
	21	/* iscsi_determine_counts_for_list() type */
	22	#define PDULIST_NORMAL 1
	23	#define PDULIST_IMMEDIATE 2
	24	#define PDULIST_UNSOLICITED 3
	25	#define PDULIST_IMMEDIATE_AND_UNSOLICITED 4
	26
	27	/* struct iscsi_pdu->type */
	28	#define PDUTYPE_IMMEDIATE 1
	29	#define PDUTYPE_UNSOLICITED 2
	30	#define PDUTYPE_NORMAL 3
	31
	32	/* struct iscsi_pdu->status */
	33	#define ISCSI_PDU_NOT_RECEIVED 0
	34	#define ISCSI_PDU_RECEIVED_OK 1
	35	#define ISCSI_PDU_CRC_FAILED 2
	36	#define ISCSI_PDU_TIMED_OUT 3
	37
	38	/* struct iscsi_build_list->randomize */
	39	#define RANDOM_DATAIN_PDU_OFFSETS 0x01
	40	#define RANDOM_DATAIN_SEQ_OFFSETS 0x02
	41	#define RANDOM_DATAOUT_PDU_OFFSETS 0x04
	42	#define RANDOM_R2T_OFFSETS 0x08
	43
	44	/* struct iscsi_build_list->data_direction */
	45	#define ISCSI_PDU_READ 0x01
	46	#define ISCSI_PDU_WRITE 0x02
	47
	48	struct iscsi_build_list {
	49	int data_direction;
	50	int randomize;
	51	int type;
	52	int immediate_data_length;
	53	};
	54
	55	struct iscsi_pdu {
	56	int status;
	57	int type;
	58	u8 flags;
	59	u32 data_sn;
	60	u32 length;
	61	u32 offset;
	62	u32 pdu_send_order;
	63	u32 seq_no;
	64	} ____cacheline_aligned;
	65
	66	struct iscsi_seq {
	67	int sent;
	68	int status;
	69	int type;
	70	u32 data_sn;
	71	u32 first_datasn;
72	u32 last_datasn;
73	u32 next_burst_len;
74	u32 pdu_start;
75	u32 pdu_count;
76	u32 offset;
77	u32 orig_offset;
78	u32 pdu_send_order;
79	u32 r2t_sn;
80	u32 seq_send_order;
81	u32 seq_no;
82	u32 xfer_len;
83	} ____cacheline_aligned;
84
8dcf07be BVA	85	struct iscsi_cmd;
8dcf07be BVA	86
4334e49b	87	extern int iscsit_build_pdu_and_seq_lists(struct iscsi_cmd *, u32);
e48354ce NB	88	extern struct iscsi_pdu iscsit_get_pdu_holder(struct iscsi_cmd , u32, u32);
	89	extern struct iscsi_pdu iscsit_get_pdu_holder_for_seq(struct iscsi_cmd , struct iscsi_seq *);
	90	extern struct iscsi_seq iscsit_get_seq_holder(struct iscsi_cmd , u32, u32);
	91
	92	#endif /* ISCSI_SEQ_AND_PDU_LIST_H */