[mirror_ubuntu-bionic-kernel.git] / drivers / s390 / scsi / zfcp_def.h

/*
 * zfcp device driver
 *
 * Global definitions for the zfcp device driver.
 *
 * Copyright IBM Corporation 2002, 2009
 */

#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/qdio.h>
#include <asm/debug.h>
#include <asm/ebcdic.h>
#include <asm/sysinfo.h>
#include "zfcp_fsf.h"

struct zfcp_reqlist;

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

/********************* CIO/QDIO SPECIFIC DEFINES *****************************/

/* DMQ bug workaround: don't use last SBALE */
#define ZFCP_MAX_SBALES_PER_SBAL	(QDIO_MAX_ELEMENTS_PER_BUFFER - 1)

/* index of last SBALE (with respect to DMQ bug workaround) */
#define ZFCP_LAST_SBALE_PER_SBAL	(ZFCP_MAX_SBALES_PER_SBAL - 1)

/* max. number of (data buffer) SBALEs in largest SBAL chain */
#define ZFCP_MAX_SBALES_PER_REQ		\
	(FSF_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2)
        /* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */

#define ZFCP_MAX_SECTORS (ZFCP_MAX_SBALES_PER_REQ * 8)
        /* max. number of (data buffer) SBALEs in largest SBAL chain
           multiplied with number of sectors per 4k block */

/********************* 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_QDIOUP		0x00000002
#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

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

/* logical unit status */
#define ZFCP_STATUS_UNIT_SHARED			0x00000004
#define ZFCP_STATUS_UNIT_READONLY		0x00000008

/* FSF request status (this does not have a common part) */
#define ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT	0x00000002
#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 *status_read_data;
	mempool_t *gid_pn;
	mempool_t *qtcb_pool;
};

struct zfcp_qdio_queue {
	struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q];
	u8		   first;	/* index of next free bfr in queue */
	atomic_t           count;	/* number of free buffers in queue */
};

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 zfcp_unit *unit;
	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_qdio - basic QDIO data structure
 * @resp_q: response queue
 * @req_q: request queue
 * @stat_lock: lock to protect req_q_util and req_q_time
 * @req_q_lock; lock to serialize access to request queue
 * @req_q_time: time of last fill level change
 * @req_q_util: used for accounting
 * @req_q_full: queue full incidents
 * @req_q_wq: used to wait for SBAL availability
 * @adapter: adapter used in conjunction with this QDIO structure
 */
struct zfcp_qdio {
	struct zfcp_qdio_queue	resp_q;
	struct zfcp_qdio_queue	req_q;
	spinlock_t		stat_lock;
	spinlock_t		req_q_lock;
	unsigned long long	req_q_time;
	u64			req_q_util;
	atomic_t		req_q_full;
	wait_queue_head_t	req_q_wq;
	struct zfcp_adapter	*adapter;
};

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*/
	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 service_level	service_level;
	struct workqueue_struct	*work_queue;
};

struct zfcp_port {
	struct device          sysfs_device;   /* sysfs device */
	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;
};

struct zfcp_unit {
	struct device          sysfs_device;   /* sysfs device */
	struct list_head       list;	       /* list of logical units */
	struct zfcp_port       *port;	       /* remote port of unit */
	atomic_t	       status;	       /* status of this logical unit */
	u64		       fcp_lun;	       /* own FCP_LUN */
	u32		       handle;	       /* handle assigned by FSF */
        struct scsi_device     *device;        /* scsi device struct pointer */
	struct zfcp_erp_action erp_action;     /* pending error recovery */
        atomic_t               erp_counter;
	struct zfcp_latencies	latencies;
	struct work_struct	scsi_work;
};

/**
 * struct zfcp_queue_req - queue related values for a request
 * @sbal_number: number of free SBALs
 * @sbal_first: first SBAL for this request
 * @sbal_last: last SBAL for this request
 * @sbal_limit: last possible SBAL for this request
 * @sbale_curr: current SBALE at creation of this request
 * @sbal_response: SBAL used in interrupt
 * @qdio_outb_usage: usage of outbound queue
 * @qdio_inb_usage: usage of inbound queue
 */
struct zfcp_queue_req {
	u8		       sbal_number;
	u8		       sbal_first;
	u8		       sbal_last;
	u8		       sbal_limit;
	u8		       sbale_curr;
	u8		       sbal_response;
	u16		       qdio_outb_usage;
	u16		       qdio_inb_usage;
};

/**
 * struct zfcp_fsf_req - basic FSF request structure
 * @list: list of FSF requests
 * @req_id: unique request ID
 * @adapter: adapter this request belongs to
 * @queue_req: 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)
 * @unit: reference to unit if this request is a SCSI request
 * @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_queue_req	queue_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;
	struct zfcp_unit	*unit;
	void			(*handler)(struct zfcp_fsf_req *);
};

/* driver data */
struct zfcp_data {
	struct scsi_host_template scsi_host_template;
	struct scsi_transport_template *scsi_transport_template;
	struct kmem_cache	*gpn_ft_cache;
	struct kmem_cache	*qtcb_cache;
	struct kmem_cache	*sr_buffer_cache;
	struct kmem_cache	*gid_pn_cache;
	struct kmem_cache	*adisc_cache;
};

/********************** ZFCP SPECIFIC DEFINES ********************************/

#define ZFCP_SET                0x00000100
#define ZFCP_CLEAR              0x00000200

#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	*
a2fa0aed	6	* Copyright IBM Corporation 2002, 2009
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 LT	35	#include <asm/ccwdev.h>
	36	#include <asm/qdio.h>
	37	#include <asm/debug.h>
	38	#include <asm/ebcdic.h>
bd43a42b	39	#include <asm/sysinfo.h>
dd52e0ea	40	#include "zfcp_fsf.h"
1da177e4	41
b6bd2fb9	42	struct zfcp_reqlist;
1da177e4	43
06506d00	44	/******************* SCSI SPECIFIC DEFINES *******************************/
f6c0e7a7	45	#define ZFCP_SCSI_ER_TIMEOUT (10*HZ)
1da177e4 LT	46
	47	/******************* CIO/QDIO SPECIFIC DEFINES ***************************/
	48
1da177e4 LT	49	/* DMQ bug workaround: don't use last SBALE */
	50	#define ZFCP_MAX_SBALES_PER_SBAL (QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
	51
	52	/* index of last SBALE (with respect to DMQ bug workaround) */
	53	#define ZFCP_LAST_SBALE_PER_SBAL (ZFCP_MAX_SBALES_PER_SBAL - 1)
	54
	55	/* max. number of (data buffer) SBALEs in largest SBAL chain */
	56	#define ZFCP_MAX_SBALES_PER_REQ \
c41f8cbd	57	(FSF_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2)
1da177e4 LT	58	/* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */
1da177e4 LT	59
8d1a0060 SS	60	#define ZFCP_MAX_SECTORS (ZFCP_MAX_SBALES_PER_REQ * 8)
	61	/* max. number of (data buffer) SBALEs in largest SBAL chain
	62	multiplied with number of sectors per 4k block */
	63
1da177e4 LT	64	/******************* FSF SPECIFIC DEFINES *******************************/
1da177e4 LT	65
1da177e4 LT	66	/* ATTENTION: value must not be used by hardware */
1da177e4 LT	67	#define FSF_QTCB_UNSOLICITED_STATUS 0x6305
22753fa5	68
1da177e4	69	/* timeout value for "default timer" for fsf requests */
2abbe866	70	#define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ)
1da177e4	71
1da177e4 LT	72	/************* ADAPTER/PORT/UNIT AND FSF_REQ STATUS FLAGS ****************/
1da177e4 LT	73
41fa2ada SS	74	/*
41fa2ada SS	75	* Note, the leftmost status byte is common among adapter, port
1da177e4 LT	76	* and unit
	77	*/
	78	#define ZFCP_COMMON_FLAGS 0xfff00000
1da177e4 LT	79
1da177e4 LT	80	/* common status bits */
1da177e4 LT	81	#define ZFCP_STATUS_COMMON_RUNNING 0x40000000
	82	#define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000
	83	#define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000
1da177e4	84	#define ZFCP_STATUS_COMMON_OPEN 0x04000000
1da177e4 LT	85	#define ZFCP_STATUS_COMMON_ERP_INUSE 0x01000000
1da177e4 LT	86	#define ZFCP_STATUS_COMMON_ACCESS_DENIED 0x00800000
d736a27b	87	#define ZFCP_STATUS_COMMON_ACCESS_BOXED 0x00400000
cc8c2829	88	#define ZFCP_STATUS_COMMON_NOESC 0x00200000
1da177e4 LT	89
	90	/* adapter status */
	91	#define ZFCP_STATUS_ADAPTER_QDIOUP 0x00000002
1da177e4 LT	92	#define ZFCP_STATUS_ADAPTER_XCONFIG_OK 0x00000008
1da177e4 LT	93	#define ZFCP_STATUS_ADAPTER_HOST_CON_INIT 0x00000010
1da177e4 LT	94	#define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100
	95	#define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200
	96
1da177e4 LT	97	/* remote port status */
1da177e4 LT	98	#define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001
14e242ea	99	#define ZFCP_STATUS_PORT_LINK_TEST 0x00000002
1da177e4	100
1da177e4	101	/* logical unit status */
1da177e4 LT	102	#define ZFCP_STATUS_UNIT_SHARED 0x00000004
	103	#define ZFCP_STATUS_UNIT_READONLY 0x00000008
	104
	105	/* FSF request status (this does not have a common part) */
1da177e4	106	#define ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT 0x00000002
1da177e4 LT	107	#define ZFCP_STATUS_FSFREQ_ERROR 0x00000008
1da177e4 LT	108	#define ZFCP_STATUS_FSFREQ_CLEANUP 0x00000010
1da177e4 LT	109	#define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED 0x00000040
1da177e4 LT	110	#define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED 0x00000080
1da177e4	111	#define ZFCP_STATUS_FSFREQ_TMFUNCFAILED 0x00000200
1da177e4 LT	112	#define ZFCP_STATUS_FSFREQ_DISMISSED 0x00001000
1da177e4 LT	113
1da177e4 LT	114	/*********************** STRUCTURE DEFINITIONS ***************************/
	115
	116	struct zfcp_fsf_req;
	117
	118	/* holds various memory pools of an adapter */
	119	struct zfcp_adapter_mempool {
a4623c46	120	mempool_t *erp_req;
799b76d0	121	mempool_t *gid_pn_req;
a4623c46 SS	122	mempool_t *scsi_req;
	123	mempool_t *scsi_abort;
	124	mempool_t *status_read_req;
	125	mempool_t *status_read_data;
dbf5dfe9	126	mempool_t *gid_pn;
a4623c46	127	mempool_t *qtcb_pool;
1da177e4 LT	128	};
1da177e4 LT	129
1da177e4	130	struct zfcp_qdio_queue {
0406289e CS	131	struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q];
	132	u8 first; /* index of next free bfr in queue */
	133	atomic_t count; /* number of free buffers in queue */
1da177e4 LT	134	};
	135
	136	struct zfcp_erp_action {
	137	struct list_head list;
	138	int action; /* requested action code */
	139	struct zfcp_adapter adapter; / device which should be recovered */
	140	struct zfcp_port *port;
	141	struct zfcp_unit *unit;
44cc76f2	142	u32 status; /* recovery status */
1da177e4	143	u32 step; /* active step of this erp action */
e60a6d69	144	unsigned long fsf_req_id;
1da177e4 LT	145	struct timer_list timer;
	146	};
	147
c9615858 CS	148	struct fsf_latency_record {
	149	u32 min;
	150	u32 max;
	151	u64 sum;
	152	};
	153
	154	struct latency_cont {
	155	struct fsf_latency_record channel;
	156	struct fsf_latency_record fabric;
	157	u64 counter;
	158	};
	159
	160	struct zfcp_latencies {
	161	struct latency_cont read;
	162	struct latency_cont write;
	163	struct latency_cont cmd;
	164	spinlock_t lock;
	165	};
1da177e4	166
564e1c86 SS	167	/** struct zfcp_qdio - basic QDIO data structure
	168	* @resp_q: response queue
	169	* @req_q: request queue
	170	* @stat_lock: lock to protect req_q_util and req_q_time
	171	* @req_q_lock; lock to serialize access to request queue
	172	* @req_q_time: time of last fill level change
	173	* @req_q_util: used for accounting
	174	* @req_q_full: queue full incidents
	175	* @req_q_wq: used to wait for SBAL availability
	176	* @adapter: adapter used in conjunction with this QDIO structure
	177	*/
	178	struct zfcp_qdio {
	179	struct zfcp_qdio_queue resp_q;
	180	struct zfcp_qdio_queue req_q;
	181	spinlock_t stat_lock;
	182	spinlock_t req_q_lock;
41e05a12	183	unsigned long long req_q_time;
564e1c86 SS	184	u64 req_q_util;
	185	atomic_t req_q_full;
	186	wait_queue_head_t req_q_wq;
	187	struct zfcp_adapter *adapter;
	188	};
	189
1da177e4	190	struct zfcp_adapter {
f3450c7b	191	struct kref ref;
7ba58c9c SS	192	u64 peer_wwnn; /* P2P peer WWNN */
7ba58c9c SS	193	u64 peer_wwpn; /* P2P peer WWPN */
13e1e1f0	194	u32 peer_d_id; /* P2P peer D_ID */
1da177e4	195	struct ccw_device ccw_device; / S/390 ccw device */
564e1c86	196	struct zfcp_qdio *qdio;
1da177e4 LT	197	u32 hydra_version; /* Hydra version */
1da177e4 LT	198	u32 fsf_lic_version;
aef4a983 MS	199	u32 adapter_features; /* FCP channel features */
aef4a983 MS	200	u32 connection_features; /* host connection features */
1da177e4	201	u32 hardware_version; /* of FCP channel */
c9615858	202	u16 timer_ticks; /* time int for a tick */
1da177e4	203	struct Scsi_Host scsi_host; / Pointer to mid-layer */
ecf0c772 SS	204	struct list_head port_list; /* remote port list */
ecf0c772 SS	205	rwlock_t port_list_lock; /* port list lock */
fea9d6c7	206	unsigned long req_no; /* unique FSF req number */
b6bd2fb9	207	struct zfcp_reqlist *req_list;
1da177e4	208	u32 fsf_req_seq_no; /* FSF cmnd seq number */
1da177e4 LT	209	rwlock_t abort_lock; /* Protects against SCSI
	210	stack abort/command
	211	completion races */
d26ab06e SS	212	atomic_t stat_miss; /* # missing status reads*/
d26ab06e SS	213	struct work_struct stat_work;
1da177e4 LT	214	atomic_t status; /* status of this adapter */
	215	struct list_head erp_ready_head; /* error recovery for this
	216	adapter/devices */
347c6a96	217	wait_queue_head_t erp_ready_wq;
1da177e4 LT	218	struct list_head erp_running_head;
1da177e4 LT	219	rwlock_t erp_lock;
1da177e4 LT	220	wait_queue_head_t erp_done_wqh;
	221	struct zfcp_erp_action erp_action; /* pending error recovery */
	222	atomic_t erp_counter;
	223	u32 erp_total_count; /* total nr of enqueued erp
	224	actions */
	225	u32 erp_low_mem_count; /* nr of erp actions waiting
	226	for memory */
347c6a96	227	struct task_struct *erp_thread;
bd0072ec	228	struct zfcp_fc_wka_ports gs; / generic services */
d46f384a	229	struct zfcp_dbf dbf; / debug traces */
1da177e4	230	struct zfcp_adapter_mempool pool; /* Adapter memory pools */
f6cd94b1 AH	231	struct fc_host_statistics *fc_stats;
	232	struct fsf_qtcb_bottom_port *stats_reset_data;
	233	unsigned long stats_reset;
cc8c2829	234	struct work_struct scan_work;
bd43a42b	235	struct service_level service_level;
4544683a	236	struct workqueue_struct *work_queue;
1da177e4 LT	237	};
1da177e4 LT	238
1da177e4 LT	239	struct zfcp_port {
1da177e4 LT	240	struct device sysfs_device; /* sysfs device */
3859f6a2	241	struct fc_rport rport; / rport of fc transport class */
1da177e4	242	struct list_head list; /* list of remote ports */
1da177e4	243	struct zfcp_adapter adapter; / adapter used to access port */
ecf0c772 SS	244	struct list_head unit_list; /* head of logical unit list */
ecf0c772 SS	245	rwlock_t unit_list_lock; /* unit list lock */
1da177e4	246	atomic_t status; /* status of this remote port */
7ba58c9c SS	247	u64 wwnn; /* WWNN if known */
7ba58c9c SS	248	u64 wwpn; /* WWPN */
13e1e1f0	249	u32 d_id; /* D_ID */
1da177e4 LT	250	u32 handle; /* handle assigned by FSF */
	251	struct zfcp_erp_action erp_action; /* pending error recovery */
	252	atomic_t erp_counter;
75bfc283 RW	253	u32 maxframe_size;
75bfc283 RW	254	u32 supported_classes;
5ab944f9	255	struct work_struct gid_pn_work;
8fdf30d5	256	struct work_struct test_link_work;
a2fa0aed CS	257	struct work_struct rport_work;
a2fa0aed CS	258	enum { RPORT_NONE, RPORT_ADD, RPORT_DEL } rport_task;
1da177e4 LT	259	};
1da177e4 LT	260
1da177e4 LT	261	struct zfcp_unit {
	262	struct device sysfs_device; /* sysfs device */
	263	struct list_head list; /* list of logical units */
1da177e4 LT	264	struct zfcp_port port; / remote port of unit */
1da177e4 LT	265	atomic_t status; /* status of this logical unit */
7ba58c9c	266	u64 fcp_lun; /* own FCP_LUN */
1da177e4 LT	267	u32 handle; /* handle assigned by FSF */
	268	struct scsi_device device; / scsi device struct pointer */
	269	struct zfcp_erp_action erp_action; /* pending error recovery */
	270	atomic_t erp_counter;
c9615858	271	struct zfcp_latencies latencies;
92d5193b	272	struct work_struct scsi_work;
1da177e4 LT	273	};
1da177e4 LT	274
42428f74 SS	275	/**
	276	* struct zfcp_queue_req - queue related values for a request
	277	* @sbal_number: number of free SBALs
	278	* @sbal_first: first SBAL for this request
	279	* @sbal_last: last SBAL for this request
	280	* @sbal_limit: last possible SBAL for this request
	281	* @sbale_curr: current SBALE at creation of this request
	282	* @sbal_response: SBAL used in interrupt
	283	* @qdio_outb_usage: usage of outbound queue
	284	* @qdio_inb_usage: usage of inbound queue
	285	*/
	286	struct zfcp_queue_req {
	287	u8 sbal_number;
	288	u8 sbal_first;
	289	u8 sbal_last;
	290	u8 sbal_limit;
	291	u8 sbale_curr;
	292	u8 sbal_response;
	293	u16 qdio_outb_usage;
	294	u16 qdio_inb_usage;
	295	};
	296
	297	/**
	298	* struct zfcp_fsf_req - basic FSF request structure
	299	* @list: list of FSF requests
	300	* @req_id: unique request ID
	301	* @adapter: adapter this request belongs to
	302	* @queue_req: queue related values
	303	* @completion: used to signal the completion of the request
	304	* @status: status of the request
	305	* @fsf_command: FSF command issued
	306	* @qtcb: associated QTCB
	307	* @seq_no: sequence number of this request
	308	* @data: private data
	309	* @timer: timer data of this request
	310	* @erp_action: reference to erp action if request issued on behalf of ERP
	311	* @pool: reference to memory pool if used for this request
	312	* @issued: time when request was send (STCK)
	313	* @unit: reference to unit if this request is a SCSI request
	314	* @handler: handler which should be called to process response
	315	*/
1da177e4	316	struct zfcp_fsf_req {
42428f74 SS	317	struct list_head list;
	318	unsigned long req_id;
	319	struct zfcp_adapter *adapter;
	320	struct zfcp_queue_req queue_req;
	321	struct completion completion;
	322	u32 status;
	323	u32 fsf_command;
	324	struct fsf_qtcb *qtcb;
	325	u32 seq_no;
	326	void *data;
	327	struct timer_list timer;
	328	struct zfcp_erp_action *erp_action;
	329	mempool_t *pool;
	330	unsigned long long issued;
	331	struct zfcp_unit *unit;
c41f8cbd	332	void (handler)(struct zfcp_fsf_req );
1da177e4 LT	333	};
1da177e4 LT	334
1da177e4 LT	335	/* driver data */
	336	struct zfcp_data {
	337	struct scsi_host_template scsi_host_template;
dd52e0ea	338	struct scsi_transport_template *scsi_transport_template;
a4623c46 SS	339	struct kmem_cache *gpn_ft_cache;
a4623c46 SS	340	struct kmem_cache *qtcb_cache;
7ba58c9c SS	341	struct kmem_cache *sr_buffer_cache;
7ba58c9c SS	342	struct kmem_cache *gid_pn_cache;
ee744622	343	struct kmem_cache *adisc_cache;
1da177e4 LT	344	};
1da177e4 LT	345
1da177e4 LT	346	/******************** ZFCP SPECIFIC DEFINES ******************************/
1da177e4 LT	347
1da177e4 LT	348	#define ZFCP_SET 0x00000100
	349	#define ZFCP_CLEAR 0x00000200
	350
1da177e4	351	#endif /* ZFCP_DEF_H */