[linux-2.6-block.git] / drivers / s390 / scsi / zfcp_def.h

/*
 * zfcp device driver
 *
 * Global definitions for the zfcp device driver.
 *
 * Copyright IBM Corp. 2002, 2010
 */

#ifndef ZFCP_DEF_H
#define ZFCP_DEF_H

/*************************** INCLUDES *****************************************/

#include <linux/init.h>
#include <linux/moduleparam.h>
#include <linux/major.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/slab.h>
#include <linux/mempool.h>
#include <linux/syscalls.h>
#include <linux/scatterlist.h>
#include <linux/ioctl.h>
#include <scsi/fc/fc_fs.h>
#include <scsi/fc/fc_gs.h>
#include <scsi/scsi.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_fc.h>
#include <scsi/scsi_bsg_fc.h>
#include <asm/ccwdev.h>
#include <asm/debug.h>
#include <asm/ebcdic.h>
#include <asm/sysinfo.h>
#include "zfcp_fsf.h"
#include "zfcp_fc.h"
#include "zfcp_qdio.h"

struct zfcp_reqlist;

/********************* SCSI SPECIFIC DEFINES *********************************/
#define ZFCP_SCSI_ER_TIMEOUT                    (10*HZ)

/********************* FSF SPECIFIC DEFINES *********************************/

/* ATTENTION: value must not be used by hardware */
#define FSF_QTCB_UNSOLICITED_STATUS		0x6305

/* timeout value for "default timer" for fsf requests */
#define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ)

/*************** ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ******************/

/*
 * Note, the leftmost status byte is common among adapter, port
 * and unit
 */
#define ZFCP_COMMON_FLAGS			0xfff00000

/* common status bits */
#define ZFCP_STATUS_COMMON_RUNNING		0x40000000
#define ZFCP_STATUS_COMMON_ERP_FAILED		0x20000000
#define ZFCP_STATUS_COMMON_UNBLOCKED		0x10000000
#define ZFCP_STATUS_COMMON_OPEN                 0x04000000
#define ZFCP_STATUS_COMMON_ERP_INUSE		0x01000000
#define ZFCP_STATUS_COMMON_ACCESS_DENIED	0x00800000
#define ZFCP_STATUS_COMMON_ACCESS_BOXED		0x00400000
#define ZFCP_STATUS_COMMON_NOESC		0x00200000

/* adapter status */
#define ZFCP_STATUS_ADAPTER_MB_ACT		0x00000001
#define ZFCP_STATUS_ADAPTER_QDIOUP		0x00000002
#define ZFCP_STATUS_ADAPTER_SIOSL_ISSUED	0x00000004
#define ZFCP_STATUS_ADAPTER_XCONFIG_OK		0x00000008
#define ZFCP_STATUS_ADAPTER_HOST_CON_INIT	0x00000010
#define ZFCP_STATUS_ADAPTER_ERP_PENDING		0x00000100
#define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED	0x00000200
#define ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED	0x00000400

/* remote port status */
#define ZFCP_STATUS_PORT_PHYS_OPEN		0x00000001
#define ZFCP_STATUS_PORT_LINK_TEST		0x00000002

/* logical unit status */
#define ZFCP_STATUS_LUN_SHARED			0x00000004
#define ZFCP_STATUS_LUN_READONLY		0x00000008

/* FSF request status (this does not have a common part) */
#define ZFCP_STATUS_FSFREQ_ERROR		0x00000008
#define ZFCP_STATUS_FSFREQ_CLEANUP		0x00000010
#define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED	0x00000040
#define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED       0x00000080
#define ZFCP_STATUS_FSFREQ_TMFUNCFAILED         0x00000200
#define ZFCP_STATUS_FSFREQ_DISMISSED            0x00001000

/************************* STRUCTURE DEFINITIONS *****************************/

struct zfcp_fsf_req;

/* holds various memory pools of an adapter */
struct zfcp_adapter_mempool {
	mempool_t *erp_req;
	mempool_t *gid_pn_req;
	mempool_t *scsi_req;
	mempool_t *scsi_abort;
	mempool_t *status_read_req;
	mempool_t *sr_data;
	mempool_t *gid_pn;
	mempool_t *qtcb_pool;
};

struct zfcp_erp_action {
	struct list_head list;
	int action;	              /* requested action code */
	struct zfcp_adapter *adapter; /* device which should be recovered */
	struct zfcp_port *port;
	struct scsi_device *sdev;
	u32		status;	      /* recovery status */
	u32 step;	              /* active step of this erp action */
	unsigned long		fsf_req_id;
	struct timer_list timer;
};

struct fsf_latency_record {
	u32 min;
	u32 max;
	u64 sum;
};

struct latency_cont {
	struct fsf_latency_record channel;
	struct fsf_latency_record fabric;
	u64 counter;
};

struct zfcp_latencies {
	struct latency_cont read;
	struct latency_cont write;
	struct latency_cont cmd;
	spinlock_t lock;
};

struct zfcp_adapter {
	struct kref		ref;
	u64			peer_wwnn;	   /* P2P peer WWNN */
	u64			peer_wwpn;	   /* P2P peer WWPN */
	u32			peer_d_id;	   /* P2P peer D_ID */
	struct ccw_device       *ccw_device;	   /* S/390 ccw device */
	struct zfcp_qdio	*qdio;
	u32			hydra_version;	   /* Hydra version */
	u32			fsf_lic_version;
	u32			adapter_features;  /* FCP channel features */
	u32			connection_features; /* host connection features */
        u32			hardware_version;  /* of FCP channel */
	u16			timer_ticks;       /* time int for a tick */
	struct Scsi_Host	*scsi_host;	   /* Pointer to mid-layer */
	struct list_head	port_list;	   /* remote port list */
	rwlock_t		port_list_lock;    /* port list lock */
	unsigned long		req_no;		   /* unique FSF req number */
	struct zfcp_reqlist	*req_list;
	u32			fsf_req_seq_no;	   /* FSF cmnd seq number */
	rwlock_t		abort_lock;        /* Protects against SCSI
						      stack abort/command
						      completion races */
	atomic_t		stat_miss;	   /* # missing status reads*/
	unsigned int		stat_read_buf_num;
	struct work_struct	stat_work;
	atomic_t		status;	           /* status of this adapter */
	struct list_head	erp_ready_head;	   /* error recovery for this
						      adapter/devices */
	wait_queue_head_t	erp_ready_wq;
	struct list_head	erp_running_head;
	rwlock_t		erp_lock;
	wait_queue_head_t	erp_done_wqh;
	struct zfcp_erp_action	erp_action;	   /* pending error recovery */
        atomic_t                erp_counter;
	u32			erp_total_count;   /* total nr of enqueued erp
						      actions */
	u32			erp_low_mem_count; /* nr of erp actions waiting
						      for memory */
	struct task_struct	*erp_thread;
	struct zfcp_fc_wka_ports *gs;		   /* generic services */
	struct zfcp_dbf		*dbf;		   /* debug traces */
	struct zfcp_adapter_mempool	pool;      /* Adapter memory pools */
	struct fc_host_statistics *fc_stats;
	struct fsf_qtcb_bottom_port *stats_reset_data;
	unsigned long		stats_reset;
	struct work_struct	scan_work;
	struct work_struct	ns_up_work;
	struct service_level	service_level;
	struct workqueue_struct	*work_queue;
	struct device_dma_parameters dma_parms;
	struct zfcp_fc_events events;
};

struct zfcp_port {
	struct device          dev;
	struct fc_rport        *rport;         /* rport of fc transport class */
	struct list_head       list;	       /* list of remote ports */
	struct zfcp_adapter    *adapter;       /* adapter used to access port */
	struct list_head	unit_list;	/* head of logical unit list */
	rwlock_t		unit_list_lock; /* unit list lock */
	atomic_t	       status;	       /* status of this remote port */
	u64		       wwnn;	       /* WWNN if known */
	u64		       wwpn;	       /* WWPN */
	u32		       d_id;	       /* D_ID */
	u32		       handle;	       /* handle assigned by FSF */
	struct zfcp_erp_action erp_action;     /* pending error recovery */
        atomic_t               erp_counter;
	u32                    maxframe_size;
	u32                    supported_classes;
	struct work_struct     gid_pn_work;
	struct work_struct     test_link_work;
	struct work_struct     rport_work;
	enum { RPORT_NONE, RPORT_ADD, RPORT_DEL }  rport_task;
	unsigned int		starget_id;
};

/**
 * struct zfcp_unit - LUN configured via zfcp sysfs
 * @dev: struct device for sysfs representation and reference counting
 * @list: entry in LUN/unit list per zfcp_port
 * @port: reference to zfcp_port where this LUN is configured
 * @fcp_lun: 64 bit LUN value
 * @scsi_work: for running scsi_scan_target
 *
 * This is the representation of a LUN that has been configured for
 * usage. The main data here is the 64 bit LUN value, data for
 * running I/O and recovery is in struct zfcp_scsi_dev.
 */
struct zfcp_unit {
	struct device		dev;
	struct list_head	list;
	struct zfcp_port	*port;
	u64			fcp_lun;
	struct work_struct	scsi_work;
};

/**
 * struct zfcp_scsi_dev - zfcp data per SCSI device
 * @status: zfcp internal status flags
 * @lun_handle: handle from "open lun" for issuing FSF requests
 * @erp_action: zfcp erp data for opening and recovering this LUN
 * @erp_counter: zfcp erp counter for this LUN
 * @latencies: FSF channel and fabric latencies
 * @port: zfcp_port where this LUN belongs to
 */
struct zfcp_scsi_dev {
	atomic_t		status;
	u32			lun_handle;
	struct zfcp_erp_action	erp_action;
	atomic_t		erp_counter;
	struct zfcp_latencies	latencies;
	struct zfcp_port	*port;
};

/**
 * sdev_to_zfcp - Access zfcp LUN data for SCSI device
 * @sdev: scsi_device where to get the zfcp_scsi_dev pointer
 */
static inline struct zfcp_scsi_dev *sdev_to_zfcp(struct scsi_device *sdev)
{
	return scsi_transport_device_data(sdev);
}

/**
 * zfcp_scsi_dev_lun - Return SCSI device LUN as 64 bit FCP LUN
 * @sdev: SCSI device where to get the LUN from
 */
static inline u64 zfcp_scsi_dev_lun(struct scsi_device *sdev)
{
	u64 fcp_lun;

	int_to_scsilun(sdev->lun, (struct scsi_lun *)&fcp_lun);
	return fcp_lun;
}

/**
 * struct zfcp_fsf_req - basic FSF request structure
 * @list: list of FSF requests
 * @req_id: unique request ID
 * @adapter: adapter this request belongs to
 * @qdio_req: qdio queue related values
 * @completion: used to signal the completion of the request
 * @status: status of the request
 * @fsf_command: FSF command issued
 * @qtcb: associated QTCB
 * @seq_no: sequence number of this request
 * @data: private data
 * @timer: timer data of this request
 * @erp_action: reference to erp action if request issued on behalf of ERP
 * @pool: reference to memory pool if used for this request
 * @issued: time when request was send (STCK)
 * @handler: handler which should be called to process response
 */
struct zfcp_fsf_req {
	struct list_head	list;
	unsigned long		req_id;
	struct zfcp_adapter	*adapter;
	struct zfcp_qdio_req	qdio_req;
	struct completion	completion;
	u32			status;
	u32			fsf_command;
	struct fsf_qtcb		*qtcb;
	u32			seq_no;
	void			*data;
	struct timer_list	timer;
	struct zfcp_erp_action	*erp_action;
	mempool_t		*pool;
	unsigned long long	issued;
	void			(*handler)(struct zfcp_fsf_req *);
};

static inline
int zfcp_adapter_multi_buffer_active(struct zfcp_adapter *adapter)
{
	return atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_MB_ACT;
}

#endif /* ZFCP_DEF_H */
Commit	Line	Data
41fa2ada	1	/*
553448f6	2	* zfcp device driver
1da177e4	3	*
553448f6	4	* Global definitions for the zfcp device driver.
41fa2ada	5	*
a53c8fab	6	* Copyright IBM Corp. 2002, 2010
41fa2ada	7	*/
1da177e4	8
1da177e4 LT	9	#ifndef ZFCP_DEF_H
	10	#define ZFCP_DEF_H
	11
1da177e4 LT	12	/************************* INCLUDES ***************************************/
	13
	14	#include <linux/init.h>
	15	#include <linux/moduleparam.h>
1da177e4 LT	16	#include <linux/major.h>
	17	#include <linux/blkdev.h>
	18	#include <linux/delay.h>
	19	#include <linux/timer.h>
dd52e0ea HC	20	#include <linux/slab.h>
	21	#include <linux/mempool.h>
	22	#include <linux/syscalls.h>
f1346372	23	#include <linux/scatterlist.h>
dd52e0ea	24	#include <linux/ioctl.h>
9d544f2b SS	25	#include <scsi/fc/fc_fs.h>
9d544f2b SS	26	#include <scsi/fc/fc_gs.h>
1da177e4 LT	27	#include <scsi/scsi.h>
	28	#include <scsi/scsi_tcq.h>
	29	#include <scsi/scsi_cmnd.h>
	30	#include <scsi/scsi_device.h>
	31	#include <scsi/scsi_host.h>
	32	#include <scsi/scsi_transport.h>
	33	#include <scsi/scsi_transport_fc.h>
9d544f2b	34	#include <scsi/scsi_bsg_fc.h>
1da177e4	35	#include <asm/ccwdev.h>
1da177e4 LT	36	#include <asm/debug.h>
1da177e4 LT	37	#include <asm/ebcdic.h>
bd43a42b	38	#include <asm/sysinfo.h>
dd52e0ea	39	#include "zfcp_fsf.h"
2d1e547f	40	#include "zfcp_fc.h"
34c2b712	41	#include "zfcp_qdio.h"
1da177e4	42
b6bd2fb9	43	struct zfcp_reqlist;
1da177e4	44
06506d00	45	/******************* SCSI SPECIFIC DEFINES *******************************/
f6c0e7a7	46	#define ZFCP_SCSI_ER_TIMEOUT (10*HZ)
1da177e4	47
1da177e4 LT	48	/******************* FSF SPECIFIC DEFINES *******************************/
1da177e4 LT	49
1da177e4 LT	50	/* ATTENTION: value must not be used by hardware */
1da177e4 LT	51	#define FSF_QTCB_UNSOLICITED_STATUS 0x6305
22753fa5	52
1da177e4	53	/* timeout value for "default timer" for fsf requests */
2abbe866	54	#define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ)
1da177e4	55
1da177e4 LT	56	/************* ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ****************/
1da177e4 LT	57
41fa2ada SS	58	/*
41fa2ada SS	59	* Note, the leftmost status byte is common among adapter, port
1da177e4 LT	60	* and unit
	61	*/
	62	#define ZFCP_COMMON_FLAGS 0xfff00000
1da177e4 LT	63
1da177e4 LT	64	/* common status bits */
1da177e4 LT	65	#define ZFCP_STATUS_COMMON_RUNNING 0x40000000
	66	#define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000
	67	#define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000
1da177e4	68	#define ZFCP_STATUS_COMMON_OPEN 0x04000000
1da177e4 LT	69	#define ZFCP_STATUS_COMMON_ERP_INUSE 0x01000000
1da177e4 LT	70	#define ZFCP_STATUS_COMMON_ACCESS_DENIED 0x00800000
d736a27b	71	#define ZFCP_STATUS_COMMON_ACCESS_BOXED 0x00400000
cc8c2829	72	#define ZFCP_STATUS_COMMON_NOESC 0x00200000
1da177e4 LT	73
1da177e4 LT	74	/* adapter status */
86a9668a	75	#define ZFCP_STATUS_ADAPTER_MB_ACT 0x00000001
1da177e4	76	#define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002
339f4f4e	77	#define ZFCP_STATUS_ADAPTER_SIOSL_ISSUED 0x00000004
1da177e4 LT	78	#define ZFCP_STATUS_ADAPTER_XCONFIG_OK 0x00000008
1da177e4 LT	79	#define ZFCP_STATUS_ADAPTER_HOST_CON_INIT 0x00000010
1da177e4 LT	80	#define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100
1da177e4 LT	81	#define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200
dcc18f48	82	#define ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED 0x00000400
1da177e4	83
1da177e4 LT	84	/* remote port status */
1da177e4 LT	85	#define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001
14e242ea	86	#define ZFCP_STATUS_PORT_LINK_TEST 0x00000002
1da177e4	87
1da177e4	88	/* logical unit status */
b62a8d9b CS	89	#define ZFCP_STATUS_LUN_SHARED 0x00000004
b62a8d9b CS	90	#define ZFCP_STATUS_LUN_READONLY 0x00000008
1da177e4 LT	91
1da177e4 LT	92	/* FSF request status (this does not have a common part) */
1da177e4 LT	93	#define ZFCP_STATUS_FSFREQ_ERROR 0x00000008
1da177e4 LT	94	#define ZFCP_STATUS_FSFREQ_CLEANUP 0x00000010
1da177e4 LT	95	#define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED 0x00000040
1da177e4 LT	96	#define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED 0x00000080
1da177e4	97	#define ZFCP_STATUS_FSFREQ_TMFUNCFAILED 0x00000200
1da177e4 LT	98	#define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000
1da177e4 LT	99
1da177e4 LT	100	/*********************** STRUCTURE DEFINITIONS ***************************/
	101
	102	struct zfcp_fsf_req;
	103
	104	/* holds various memory pools of an adapter */
	105	struct zfcp_adapter_mempool {
a4623c46	106	mempool_t *erp_req;
799b76d0	107	mempool_t *gid_pn_req;
a4623c46 SS	108	mempool_t *scsi_req;
	109	mempool_t *scsi_abort;
	110	mempool_t *status_read_req;
c7b279ae	111	mempool_t *sr_data;
dbf5dfe9	112	mempool_t *gid_pn;
a4623c46	113	mempool_t *qtcb_pool;
1da177e4 LT	114	};
1da177e4 LT	115
1da177e4 LT	116	struct zfcp_erp_action {
	117	struct list_head list;
	118	int action; /* requested action code */
	119	struct zfcp_adapter adapter; / device which should be recovered */
	120	struct zfcp_port *port;
b62a8d9b	121	struct scsi_device *sdev;
44cc76f2	122	u32 status; /* recovery status */
1da177e4	123	u32 step; /* active step of this erp action */
e60a6d69	124	unsigned long fsf_req_id;
1da177e4 LT	125	struct timer_list timer;
	126	};
	127
c9615858 CS	128	struct fsf_latency_record {
	129	u32 min;
	130	u32 max;
	131	u64 sum;
	132	};
	133
	134	struct latency_cont {
	135	struct fsf_latency_record channel;
	136	struct fsf_latency_record fabric;
	137	u64 counter;
	138	};
	139
	140	struct zfcp_latencies {
	141	struct latency_cont read;
	142	struct latency_cont write;
	143	struct latency_cont cmd;
	144	spinlock_t lock;
	145	};
1da177e4 LT	146
1da177e4 LT	147	struct zfcp_adapter {
f3450c7b	148	struct kref ref;
7ba58c9c SS	149	u64 peer_wwnn; /* P2P peer WWNN */
7ba58c9c SS	150	u64 peer_wwpn; /* P2P peer WWPN */
13e1e1f0	151	u32 peer_d_id; /* P2P peer D_ID */
1da177e4	152	struct ccw_device ccw_device; / S/390 ccw device */
564e1c86	153	struct zfcp_qdio *qdio;
1da177e4 LT	154	u32 hydra_version; /* Hydra version */
1da177e4 LT	155	u32 fsf_lic_version;
aef4a983 MS	156	u32 adapter_features; /* FCP channel features */
aef4a983 MS	157	u32 connection_features; /* host connection features */
1da177e4	158	u32 hardware_version; /* of FCP channel */
c9615858	159	u16 timer_ticks; /* time int for a tick */
1da177e4	160	struct Scsi_Host scsi_host; / Pointer to mid-layer */
ecf0c772 SS	161	struct list_head port_list; /* remote port list */
ecf0c772 SS	162	rwlock_t port_list_lock; /* port list lock */
fea9d6c7	163	unsigned long req_no; /* unique FSF req number */
b6bd2fb9	164	struct zfcp_reqlist *req_list;
1da177e4	165	u32 fsf_req_seq_no; /* FSF cmnd seq number */
1da177e4 LT	166	rwlock_t abort_lock; /* Protects against SCSI
	167	stack abort/command
	168	completion races */
d26ab06e	169	atomic_t stat_miss; /* # missing status reads*/
64deb6ef	170	unsigned int stat_read_buf_num;
d26ab06e	171	struct work_struct stat_work;
1da177e4 LT	172	atomic_t status; /* status of this adapter */
	173	struct list_head erp_ready_head; /* error recovery for this
	174	adapter/devices */
347c6a96	175	wait_queue_head_t erp_ready_wq;
1da177e4 LT	176	struct list_head erp_running_head;
1da177e4 LT	177	rwlock_t erp_lock;
1da177e4 LT	178	wait_queue_head_t erp_done_wqh;
	179	struct zfcp_erp_action erp_action; /* pending error recovery */
	180	atomic_t erp_counter;
	181	u32 erp_total_count; /* total nr of enqueued erp
	182	actions */
	183	u32 erp_low_mem_count; /* nr of erp actions waiting
	184	for memory */
347c6a96	185	struct task_struct *erp_thread;
bd0072ec	186	struct zfcp_fc_wka_ports gs; / generic services */
d46f384a	187	struct zfcp_dbf dbf; / debug traces */
1da177e4	188	struct zfcp_adapter_mempool pool; /* Adapter memory pools */
f6cd94b1 AH	189	struct fc_host_statistics *fc_stats;
	190	struct fsf_qtcb_bottom_port *stats_reset_data;
	191	unsigned long stats_reset;
cc8c2829	192	struct work_struct scan_work;
038d9446	193	struct work_struct ns_up_work;
bd43a42b	194	struct service_level service_level;
4544683a	195	struct workqueue_struct *work_queue;
68322984	196	struct device_dma_parameters dma_parms;
2d1e547f	197	struct zfcp_fc_events events;
1da177e4 LT	198	};
1da177e4 LT	199
1da177e4	200	struct zfcp_port {
615f59e0	201	struct device dev;
3859f6a2	202	struct fc_rport rport; / rport of fc transport class */
1da177e4	203	struct list_head list; /* list of remote ports */
1da177e4	204	struct zfcp_adapter adapter; / adapter used to access port */
ecf0c772 SS	205	struct list_head unit_list; /* head of logical unit list */
ecf0c772 SS	206	rwlock_t unit_list_lock; /* unit list lock */
1da177e4	207	atomic_t status; /* status of this remote port */
7ba58c9c SS	208	u64 wwnn; /* WWNN if known */
7ba58c9c SS	209	u64 wwpn; /* WWPN */
13e1e1f0	210	u32 d_id; /* D_ID */
1da177e4 LT	211	u32 handle; /* handle assigned by FSF */
	212	struct zfcp_erp_action erp_action; /* pending error recovery */
	213	atomic_t erp_counter;
75bfc283 RW	214	u32 maxframe_size;
75bfc283 RW	215	u32 supported_classes;
5ab944f9	216	struct work_struct gid_pn_work;
8fdf30d5	217	struct work_struct test_link_work;
a2fa0aed CS	218	struct work_struct rport_work;
a2fa0aed CS	219	enum { RPORT_NONE, RPORT_ADD, RPORT_DEL } rport_task;
1bf3ff02	220	unsigned int starget_id;
1da177e4 LT	221	};
1da177e4 LT	222
b62a8d9b CS	223	/**
	224	* struct zfcp_unit - LUN configured via zfcp sysfs
	225	* @dev: struct device for sysfs representation and reference counting
	226	* @list: entry in LUN/unit list per zfcp_port
	227	* @port: reference to zfcp_port where this LUN is configured
	228	* @fcp_lun: 64 bit LUN value
	229	* @scsi_work: for running scsi_scan_target
	230	*
	231	* This is the representation of a LUN that has been configured for
	232	* usage. The main data here is the 64 bit LUN value, data for
	233	* running I/O and recovery is in struct zfcp_scsi_dev.
	234	*/
1da177e4	235	struct zfcp_unit {
b62a8d9b CS	236	struct device dev;
	237	struct list_head list;
	238	struct zfcp_port *port;
	239	u64 fcp_lun;
92d5193b	240	struct work_struct scsi_work;
1da177e4 LT	241	};
1da177e4 LT	242
57c23773 CS	243	/**
	244	* struct zfcp_scsi_dev - zfcp data per SCSI device
	245	* @status: zfcp internal status flags
	246	* @lun_handle: handle from "open lun" for issuing FSF requests
	247	* @erp_action: zfcp erp data for opening and recovering this LUN
	248	* @erp_counter: zfcp erp counter for this LUN
	249	* @latencies: FSF channel and fabric latencies
	250	* @port: zfcp_port where this LUN belongs to
	251	*/
	252	struct zfcp_scsi_dev {
	253	atomic_t status;
	254	u32 lun_handle;
	255	struct zfcp_erp_action erp_action;
	256	atomic_t erp_counter;
	257	struct zfcp_latencies latencies;
	258	struct zfcp_port *port;
	259	};
	260
	261	/**
	262	* sdev_to_zfcp - Access zfcp LUN data for SCSI device
	263	* @sdev: scsi_device where to get the zfcp_scsi_dev pointer
	264	*/
	265	static inline struct zfcp_scsi_dev sdev_to_zfcp(struct scsi_device sdev)
	266	{
	267	return scsi_transport_device_data(sdev);
	268	}
	269
	270	/**
	271	* zfcp_scsi_dev_lun - Return SCSI device LUN as 64 bit FCP LUN
	272	* @sdev: SCSI device where to get the LUN from
	273	*/
	274	static inline u64 zfcp_scsi_dev_lun(struct scsi_device *sdev)
	275	{
	276	u64 fcp_lun;
	277
	278	int_to_scsilun(sdev->lun, (struct scsi_lun *)&fcp_lun);
	279	return fcp_lun;
	280	}
	281
42428f74 SS	282	/**
	283	* struct zfcp_fsf_req - basic FSF request structure
	284	* @list: list of FSF requests
	285	* @req_id: unique request ID
	286	* @adapter: adapter this request belongs to
34c2b712	287	* @qdio_req: qdio queue related values
42428f74 SS	288	* @completion: used to signal the completion of the request
	289	* @status: status of the request
	290	* @fsf_command: FSF command issued
	291	* @qtcb: associated QTCB
	292	* @seq_no: sequence number of this request
	293	* @data: private data
	294	* @timer: timer data of this request
	295	* @erp_action: reference to erp action if request issued on behalf of ERP
	296	* @pool: reference to memory pool if used for this request
	297	* @issued: time when request was send (STCK)
42428f74 SS	298	* @handler: handler which should be called to process response
42428f74 SS	299	*/
1da177e4	300	struct zfcp_fsf_req {
42428f74 SS	301	struct list_head list;
	302	unsigned long req_id;
	303	struct zfcp_adapter *adapter;
34c2b712	304	struct zfcp_qdio_req qdio_req;
42428f74 SS	305	struct completion completion;
	306	u32 status;
	307	u32 fsf_command;
	308	struct fsf_qtcb *qtcb;
	309	u32 seq_no;
	310	void *data;
	311	struct timer_list timer;
	312	struct zfcp_erp_action *erp_action;
	313	mempool_t *pool;
	314	unsigned long long issued;
c41f8cbd	315	void (handler)(struct zfcp_fsf_req );
1da177e4 LT	316	};
1da177e4 LT	317
86a9668a SS	318	static inline
	319	int zfcp_adapter_multi_buffer_active(struct zfcp_adapter *adapter)
	320	{
	321	return atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_MB_ACT;
	322	}
	323
1da177e4	324	#endif /* ZFCP_DEF_H */