cregit-Linux how code gets into the kernel

Release 4.11 drivers/target/sbp/sbp_target.h

#ifndef _SBP_BASE_H

#define _SBP_BASE_H

#include <linux/firewire.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include <linux/workqueue.h>
#include <target/target_core_base.h>


#define SBP_VERSION  "v0.1"

#define SBP_NAMELEN 32


#define SBP_ORB_FETCH_SIZE	8


#define MANAGEMENT_AGENT_STATE_IDLE	0

#define MANAGEMENT_AGENT_STATE_BUSY	1


#define ORB_NOTIFY(v)			(((v) >> 31) & 0x01)

#define ORB_REQUEST_FORMAT(v)		(((v) >> 29) & 0x03)


#define MANAGEMENT_ORB_FUNCTION(v)	(((v) >> 16) & 0x0f)


#define MANAGEMENT_ORB_FUNCTION_LOGIN			0x0

#define MANAGEMENT_ORB_FUNCTION_QUERY_LOGINS		0x1

#define MANAGEMENT_ORB_FUNCTION_RECONNECT		0x3

#define MANAGEMENT_ORB_FUNCTION_SET_PASSWORD		0x4

#define MANAGEMENT_ORB_FUNCTION_LOGOUT			0x7

#define MANAGEMENT_ORB_FUNCTION_ABORT_TASK		0xb

#define MANAGEMENT_ORB_FUNCTION_ABORT_TASK_SET		0xc

#define MANAGEMENT_ORB_FUNCTION_LOGICAL_UNIT_RESET	0xe

#define MANAGEMENT_ORB_FUNCTION_TARGET_RESET		0xf


#define LOGIN_ORB_EXCLUSIVE(v)		(((v) >> 28) &   0x01)

#define LOGIN_ORB_RESERVED(v)		(((v) >> 24) &   0x0f)

#define LOGIN_ORB_RECONNECT(v)		(((v) >> 20) &   0x0f)

#define LOGIN_ORB_LUN(v)		(((v) >>  0) & 0xffff)

#define LOGIN_ORB_PASSWORD_LENGTH(v)	(((v) >> 16) & 0xffff)

#define LOGIN_ORB_RESPONSE_LENGTH(v)	(((v) >>  0) & 0xffff)


#define RECONNECT_ORB_LOGIN_ID(v)	(((v) >>  0) & 0xffff)

#define LOGOUT_ORB_LOGIN_ID(v)		(((v) >>  0) & 0xffff)


#define CMDBLK_ORB_DIRECTION(v)		(((v) >> 27) &   0x01)

#define CMDBLK_ORB_SPEED(v)		(((v) >> 24) &   0x07)

#define CMDBLK_ORB_MAX_PAYLOAD(v)	(((v) >> 20) &   0x0f)

#define CMDBLK_ORB_PG_TBL_PRESENT(v)	(((v) >> 19) &   0x01)

#define CMDBLK_ORB_PG_SIZE(v)		(((v) >> 16) &   0x07)

#define CMDBLK_ORB_DATA_SIZE(v)		(((v) >>  0) & 0xffff)


#define STATUS_BLOCK_SRC(v)		(((v) &   0x03) << 30)

#define STATUS_BLOCK_RESP(v)		(((v) &   0x03) << 28)

#define STATUS_BLOCK_DEAD(v)		(((v) ? 1 : 0)  << 27)

#define STATUS_BLOCK_LEN(v)		(((v) &   0x07) << 24)

#define STATUS_BLOCK_SBP_STATUS(v)	(((v) &   0xff) << 16)

#define STATUS_BLOCK_ORB_OFFSET_HIGH(v)	(((v) & 0xffff) <<  0)


#define STATUS_SRC_ORB_CONTINUING	0

#define STATUS_SRC_ORB_FINISHED		1

#define STATUS_SRC_UNSOLICITED		2


#define STATUS_RESP_REQUEST_COMPLETE	0

#define STATUS_RESP_TRANSPORT_FAILURE	1

#define STATUS_RESP_ILLEGAL_REQUEST	2

#define STATUS_RESP_VENDOR_DEPENDENT	3


#define SBP_STATUS_OK			0

#define SBP_STATUS_REQ_TYPE_NOTSUPP	1

#define SBP_STATUS_SPEED_NOTSUPP	2

#define SBP_STATUS_PAGE_SIZE_NOTSUPP	3

#define SBP_STATUS_ACCESS_DENIED	4

#define SBP_STATUS_LUN_NOTSUPP		5

#define SBP_STATUS_PAYLOAD_TOO_SMALL	6
/* 7 is reserved */

#define SBP_STATUS_RESOURCES_UNAVAIL	8

#define SBP_STATUS_FUNCTION_REJECTED	9

#define SBP_STATUS_LOGIN_ID_UNKNOWN	10

#define SBP_STATUS_DUMMY_ORB_COMPLETE	11

#define SBP_STATUS_REQUEST_ABORTED	12

#define SBP_STATUS_UNSPECIFIED_ERROR	0xff


#define AGENT_STATE_RESET	0

#define AGENT_STATE_ACTIVE	1

#define AGENT_STATE_SUSPENDED	2

#define AGENT_STATE_DEAD	3


struct sbp2_pointer {
	
__be32 high;
	
__be32 low;
};


struct sbp_command_block_orb {
	
struct sbp2_pointer next_orb;
	
struct sbp2_pointer data_descriptor;
	
__be32 misc;
	
u8 command_block[12];
};


struct sbp_page_table_entry {
	
__be16 segment_length;
	
__be16 segment_base_hi;
	
__be32 segment_base_lo;
};


struct sbp_management_orb {
	
struct sbp2_pointer ptr1;
	
struct sbp2_pointer ptr2;
	
__be32 misc;
	
__be32 length;
	
struct sbp2_pointer status_fifo;
};


struct sbp_status_block {
	
__be32 status;
	
__be32 orb_low;
	
u8 data[24];
};


struct sbp_login_response_block {
	
__be32 misc;
	
struct sbp2_pointer command_block_agent;
	
__be32 reconnect_hold;
};


struct sbp_login_descriptor {
	
struct sbp_session *sess;
	
struct list_head link;

	
u32 login_lun;

	
u64 status_fifo_addr;
	
int exclusive;
	
u16 login_id;

	
struct sbp_target_agent *tgt_agt;
};


struct sbp_session {
	
spinlock_t lock;
	
struct se_session *se_sess;
	
struct list_head login_list;
	
struct delayed_work maint_work;

	
u64 guid; /* login_owner_EUI_64 */
	
int node_id; /* login_owner_ID */

	
struct fw_card *card;
	
int generation;
	
int speed;

	
int reconnect_hold;
	
u64 reconnect_expires;
};


struct sbp_tpg {
	/* Target portal group tag for TCM */
	
u16 tport_tpgt;
	/* Pointer back to sbp_tport */
	
struct sbp_tport *tport;
	/* Returned by sbp_make_tpg() */
	
struct se_portal_group se_tpg;
};


struct sbp_tport {
	/* Target Unit Identifier (EUI-64) */
	
u64 guid;
	/* Target port name */
	
char tport_name[SBP_NAMELEN];
	/* Returned by sbp_make_tport() */
	
struct se_wwn tport_wwn;

	
struct sbp_tpg *tpg;

	/* FireWire unit directory */
	
struct fw_descriptor unit_directory;

	/* SBP Management Agent */
	
struct sbp_management_agent *mgt_agt;

	/* Parameters */
	
int enable;
	
s32 directory_id;
	
int mgt_orb_timeout;
	
int max_reconnect_timeout;
	
int max_logins_per_lun;
};


static inline u64 sbp2_pointer_to_addr(const struct sbp2_pointer *ptr) { return (u64)(be32_to_cpu(ptr->high) & 0x0000ffff) << 32 | (be32_to_cpu(ptr->low) & 0xfffffffc); }

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static inline void addr_to_sbp2_pointer(u64 addr, struct sbp2_pointer *ptr) { ptr->high = cpu_to_be32(addr >> 32); ptr->low = cpu_to_be32(addr); }

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struct sbp_target_agent { spinlock_t lock; struct fw_address_handler handler; struct sbp_login_descriptor *login; int state; struct work_struct work; u64 orb_pointer; bool doorbell; }; struct sbp_target_request { struct sbp_login_descriptor *login; u64 orb_pointer; struct sbp_command_block_orb orb; struct sbp_status_block status; struct work_struct work; struct se_cmd se_cmd; struct sbp_page_table_entry *pg_tbl; void *cmd_buf; unsigned char sense_buf[TRANSPORT_SENSE_BUFFER]; }; struct sbp_management_agent { spinlock_t lock; struct sbp_tport *tport; struct fw_address_handler handler; int state; struct work_struct work; u64 orb_offset; struct sbp_management_request *request; }; struct sbp_management_request { struct sbp_management_orb orb; struct sbp_status_block status; struct fw_card *card; int generation; int node_addr; int speed; }; #endif

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