[deliverable/linux.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_SUSPENDED		0x00000040
#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

/* 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 delayed_work	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;
	unsigned long		next_port_scan;
};

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		units;	       /* zfcp_unit count */
	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
cb452149	80	#define ZFCP_STATUS_ADAPTER_SUSPENDED 0x00000040
1da177e4 LT	81	#define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100
1da177e4 LT	82	#define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200
dcc18f48	83	#define ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED 0x00000400
1da177e4	84
1da177e4 LT	85	/* remote port status */
1da177e4 LT	86	#define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001
14e242ea	87	#define ZFCP_STATUS_PORT_LINK_TEST 0x00000002
1da177e4	88
1da177e4	89	/* FSF request status (this does not have a common part) */
1da177e4 LT	90	#define ZFCP_STATUS_FSFREQ_ERROR 0x00000008
1da177e4 LT	91	#define ZFCP_STATUS_FSFREQ_CLEANUP 0x00000010
1da177e4 LT	92	#define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED 0x00000040
1da177e4 LT	93	#define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED 0x00000080
1da177e4	94	#define ZFCP_STATUS_FSFREQ_TMFUNCFAILED 0x00000200
1da177e4 LT	95	#define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000
1da177e4 LT	96
1da177e4 LT	97	/*********************** STRUCTURE DEFINITIONS ***************************/
	98
	99	struct zfcp_fsf_req;
	100
	101	/* holds various memory pools of an adapter */
	102	struct zfcp_adapter_mempool {
a4623c46	103	mempool_t *erp_req;
799b76d0	104	mempool_t *gid_pn_req;
a4623c46 SS	105	mempool_t *scsi_req;
	106	mempool_t *scsi_abort;
	107	mempool_t *status_read_req;
c7b279ae	108	mempool_t *sr_data;
dbf5dfe9	109	mempool_t *gid_pn;
a4623c46	110	mempool_t *qtcb_pool;
1da177e4 LT	111	};
1da177e4 LT	112
1da177e4 LT	113	struct zfcp_erp_action {
	114	struct list_head list;
	115	int action; /* requested action code */
	116	struct zfcp_adapter adapter; / device which should be recovered */
	117	struct zfcp_port *port;
b62a8d9b	118	struct scsi_device *sdev;
44cc76f2	119	u32 status; /* recovery status */
1da177e4	120	u32 step; /* active step of this erp action */
e60a6d69	121	unsigned long fsf_req_id;
1da177e4 LT	122	struct timer_list timer;
	123	};
	124
c9615858 CS	125	struct fsf_latency_record {
	126	u32 min;
	127	u32 max;
	128	u64 sum;
	129	};
	130
	131	struct latency_cont {
	132	struct fsf_latency_record channel;
	133	struct fsf_latency_record fabric;
	134	u64 counter;
	135	};
	136
	137	struct zfcp_latencies {
	138	struct latency_cont read;
	139	struct latency_cont write;
	140	struct latency_cont cmd;
	141	spinlock_t lock;
	142	};
1da177e4 LT	143
1da177e4 LT	144	struct zfcp_adapter {
f3450c7b	145	struct kref ref;
7ba58c9c SS	146	u64 peer_wwnn; /* P2P peer WWNN */
7ba58c9c SS	147	u64 peer_wwpn; /* P2P peer WWPN */
13e1e1f0	148	u32 peer_d_id; /* P2P peer D_ID */
1da177e4	149	struct ccw_device ccw_device; / S/390 ccw device */
564e1c86	150	struct zfcp_qdio *qdio;
1da177e4 LT	151	u32 hydra_version; /* Hydra version */
1da177e4 LT	152	u32 fsf_lic_version;
aef4a983 MS	153	u32 adapter_features; /* FCP channel features */
aef4a983 MS	154	u32 connection_features; /* host connection features */
1da177e4	155	u32 hardware_version; /* of FCP channel */
c9615858	156	u16 timer_ticks; /* time int for a tick */
1da177e4	157	struct Scsi_Host scsi_host; / Pointer to mid-layer */
ecf0c772 SS	158	struct list_head port_list; /* remote port list */
ecf0c772 SS	159	rwlock_t port_list_lock; /* port list lock */
fea9d6c7	160	unsigned long req_no; /* unique FSF req number */
b6bd2fb9	161	struct zfcp_reqlist *req_list;
1da177e4	162	u32 fsf_req_seq_no; /* FSF cmnd seq number */
1da177e4 LT	163	rwlock_t abort_lock; /* Protects against SCSI
	164	stack abort/command
	165	completion races */
d26ab06e	166	atomic_t stat_miss; /* # missing status reads*/
64deb6ef	167	unsigned int stat_read_buf_num;
d26ab06e	168	struct work_struct stat_work;
1da177e4 LT	169	atomic_t status; /* status of this adapter */
	170	struct list_head erp_ready_head; /* error recovery for this
	171	adapter/devices */
347c6a96	172	wait_queue_head_t erp_ready_wq;
1da177e4 LT	173	struct list_head erp_running_head;
1da177e4 LT	174	rwlock_t erp_lock;
1da177e4 LT	175	wait_queue_head_t erp_done_wqh;
	176	struct zfcp_erp_action erp_action; /* pending error recovery */
	177	atomic_t erp_counter;
	178	u32 erp_total_count; /* total nr of enqueued erp
	179	actions */
	180	u32 erp_low_mem_count; /* nr of erp actions waiting
	181	for memory */
347c6a96	182	struct task_struct *erp_thread;
bd0072ec	183	struct zfcp_fc_wka_ports gs; / generic services */
d46f384a	184	struct zfcp_dbf dbf; / debug traces */
1da177e4	185	struct zfcp_adapter_mempool pool; /* Adapter memory pools */
f6cd94b1 AH	186	struct fc_host_statistics *fc_stats;
	187	struct fsf_qtcb_bottom_port *stats_reset_data;
	188	unsigned long stats_reset;
18f87a67	189	struct delayed_work scan_work;
038d9446	190	struct work_struct ns_up_work;
bd43a42b	191	struct service_level service_level;
4544683a	192	struct workqueue_struct *work_queue;
68322984	193	struct device_dma_parameters dma_parms;
2d1e547f	194	struct zfcp_fc_events events;
18f87a67	195	unsigned long next_port_scan;
1da177e4 LT	196	};
1da177e4 LT	197
1da177e4	198	struct zfcp_port {
615f59e0	199	struct device dev;
3859f6a2	200	struct fc_rport rport; / rport of fc transport class */
1da177e4	201	struct list_head list; /* list of remote ports */
1da177e4	202	struct zfcp_adapter adapter; / adapter used to access port */
ecf0c772 SS	203	struct list_head unit_list; /* head of logical unit list */
ecf0c772 SS	204	rwlock_t unit_list_lock; /* unit list lock */
d99b601b	205	atomic_t units; /* zfcp_unit count */
1da177e4	206	atomic_t status; /* status of this remote port */
7ba58c9c SS	207	u64 wwnn; /* WWNN if known */
7ba58c9c SS	208	u64 wwpn; /* WWPN */
13e1e1f0	209	u32 d_id; /* D_ID */
1da177e4 LT	210	u32 handle; /* handle assigned by FSF */
	211	struct zfcp_erp_action erp_action; /* pending error recovery */
	212	atomic_t erp_counter;
75bfc283 RW	213	u32 maxframe_size;
75bfc283 RW	214	u32 supported_classes;
5ab944f9	215	struct work_struct gid_pn_work;
8fdf30d5	216	struct work_struct test_link_work;
a2fa0aed CS	217	struct work_struct rport_work;
a2fa0aed CS	218	enum { RPORT_NONE, RPORT_ADD, RPORT_DEL } rport_task;
1bf3ff02	219	unsigned int starget_id;
1da177e4 LT	220	};
1da177e4 LT	221
b62a8d9b CS	222	/**
	223	* struct zfcp_unit - LUN configured via zfcp sysfs
	224	* @dev: struct device for sysfs representation and reference counting
	225	* @list: entry in LUN/unit list per zfcp_port
	226	* @port: reference to zfcp_port where this LUN is configured
	227	* @fcp_lun: 64 bit LUN value
	228	* @scsi_work: for running scsi_scan_target
	229	*
	230	* This is the representation of a LUN that has been configured for
	231	* usage. The main data here is the 64 bit LUN value, data for
	232	* running I/O and recovery is in struct zfcp_scsi_dev.
	233	*/
1da177e4	234	struct zfcp_unit {
b62a8d9b CS	235	struct device dev;
	236	struct list_head list;
	237	struct zfcp_port *port;
	238	u64 fcp_lun;
92d5193b	239	struct work_struct scsi_work;
1da177e4 LT	240	};
1da177e4 LT	241
57c23773 CS	242	/**
	243	* struct zfcp_scsi_dev - zfcp data per SCSI device
	244	* @status: zfcp internal status flags
	245	* @lun_handle: handle from "open lun" for issuing FSF requests
	246	* @erp_action: zfcp erp data for opening and recovering this LUN
	247	* @erp_counter: zfcp erp counter for this LUN
	248	* @latencies: FSF channel and fabric latencies
	249	* @port: zfcp_port where this LUN belongs to
	250	*/
	251	struct zfcp_scsi_dev {
	252	atomic_t status;
	253	u32 lun_handle;
	254	struct zfcp_erp_action erp_action;
	255	atomic_t erp_counter;
	256	struct zfcp_latencies latencies;
	257	struct zfcp_port *port;
	258	};
	259
	260	/**
	261	* sdev_to_zfcp - Access zfcp LUN data for SCSI device
	262	* @sdev: scsi_device where to get the zfcp_scsi_dev pointer
	263	*/
	264	static inline struct zfcp_scsi_dev sdev_to_zfcp(struct scsi_device sdev)
	265	{
	266	return scsi_transport_device_data(sdev);
	267	}
	268
	269	/**
	270	* zfcp_scsi_dev_lun - Return SCSI device LUN as 64 bit FCP LUN
	271	* @sdev: SCSI device where to get the LUN from
	272	*/
	273	static inline u64 zfcp_scsi_dev_lun(struct scsi_device *sdev)
	274	{
	275	u64 fcp_lun;
	276
	277	int_to_scsilun(sdev->lun, (struct scsi_lun *)&fcp_lun);
	278	return fcp_lun;
	279	}
	280
42428f74 SS	281	/**
	282	* struct zfcp_fsf_req - basic FSF request structure
	283	* @list: list of FSF requests
	284	* @req_id: unique request ID
	285	* @adapter: adapter this request belongs to
34c2b712	286	* @qdio_req: qdio queue related values
42428f74 SS	287	* @completion: used to signal the completion of the request
	288	* @status: status of the request
	289	* @fsf_command: FSF command issued
	290	* @qtcb: associated QTCB
	291	* @seq_no: sequence number of this request
	292	* @data: private data
	293	* @timer: timer data of this request
	294	* @erp_action: reference to erp action if request issued on behalf of ERP
	295	* @pool: reference to memory pool if used for this request
	296	* @issued: time when request was send (STCK)
42428f74 SS	297	* @handler: handler which should be called to process response
42428f74 SS	298	*/
1da177e4	299	struct zfcp_fsf_req {
42428f74 SS	300	struct list_head list;
	301	unsigned long req_id;
	302	struct zfcp_adapter *adapter;
34c2b712	303	struct zfcp_qdio_req qdio_req;
42428f74 SS	304	struct completion completion;
	305	u32 status;
	306	u32 fsf_command;
	307	struct fsf_qtcb *qtcb;
	308	u32 seq_no;
	309	void *data;
	310	struct timer_list timer;
	311	struct zfcp_erp_action *erp_action;
	312	mempool_t *pool;
	313	unsigned long long issued;
c41f8cbd	314	void (handler)(struct zfcp_fsf_req );
1da177e4 LT	315	};
1da177e4 LT	316
86a9668a SS	317	static inline
	318	int zfcp_adapter_multi_buffer_active(struct zfcp_adapter *adapter)
	319	{
	320	return atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_MB_ACT;
	321	}
	322
1da177e4	323	#endif /* ZFCP_DEF_H */