zfcp_def.h

linux-2.6.15.6

#define ZFCP_DBF_ELS_PAYLOAD	32
#define ZFCP_DBF_ELS_MAX_PAYLOAD 1024
	u8 payload[ZFCP_DBF_ELS_PAYLOAD];
} __attribute__ ((packed));

struct zfcp_san_dbf_record {
	u8 tag[ZFCP_DBF_TAG_SIZE];
	u64 fsf_reqid;
	u32 fsf_seqno;
	u32 s_id;
	u32 d_id;
	union {
		struct zfcp_san_dbf_record_ct ct;
		struct zfcp_san_dbf_record_els els;
	} type;
} __attribute__ ((packed));

struct zfcp_scsi_dbf_record {
	u8 tag[ZFCP_DBF_TAG_SIZE];
	u8 tag2[ZFCP_DBF_TAG_SIZE];
	u32 scsi_id;
	u32 scsi_lun;
	u32 scsi_result;
	u64 scsi_cmnd;
	u64 scsi_serial;
#define ZFCP_DBF_SCSI_OPCODE	16
	u8 scsi_opcode[ZFCP_DBF_SCSI_OPCODE];
	u8 scsi_retries;
	u8 scsi_allowed;
	u64 fsf_reqid;
	u32 fsf_seqno;
	u64 fsf_issued;
	union {
		struct {
			u64 fsf_reqid;
			u32 fsf_seqno;
			u64 fsf_issued;
		} new_fsf_req;
		struct {
			u8 rsp_validity;
			u8 rsp_scsi_status;
			u32 rsp_resid;
			u8 rsp_code;
#define ZFCP_DBF_SCSI_FCP_SNS_INFO	16
#define ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO	256
			u32 sns_info_len;
			u8 sns_info[ZFCP_DBF_SCSI_FCP_SNS_INFO];
		} fcp;
	} type;
} __attribute__ ((packed));

/*
 * FC-FS stuff
 */
#define R_A_TOV				10 /* seconds */
#define ZFCP_ELS_TIMEOUT		(2 * R_A_TOV)

#define ZFCP_LS_RLS			0x0f
#define ZFCP_LS_ADISC			0x52
#define ZFCP_LS_RPS			0x56
#define ZFCP_LS_RSCN			0x61
#define ZFCP_LS_RNID			0x78

struct zfcp_ls_rjt_par {
	u8 action;
 	u8 reason_code;
 	u8 reason_expl;
 	u8 vendor_unique;
} __attribute__ ((packed));

struct zfcp_ls_adisc {
	u8		code;
	u8		field[3];
	u32		hard_nport_id;
	u64		wwpn;
	u64		wwnn;
	u32		nport_id;
} __attribute__ ((packed));

struct zfcp_ls_adisc_acc {
	u8		code;
	u8		field[3];
	u32		hard_nport_id;
	u64		wwpn;
	u64		wwnn;
	u32		nport_id;
} __attribute__ ((packed));

struct zfcp_rc_entry {
	u8 code;
	const char *description;
};

/*
 * FC-GS-2 stuff
 */
#define ZFCP_CT_REVISION		0x01
#define ZFCP_CT_DIRECTORY_SERVICE	0xFC
#define ZFCP_CT_NAME_SERVER		0x02
#define ZFCP_CT_SYNCHRONOUS		0x00
#define ZFCP_CT_GID_PN			0x0121
#define ZFCP_CT_MAX_SIZE		0x1020
#define ZFCP_CT_ACCEPT			0x8002
#define ZFCP_CT_REJECT			0x8001

/*
 * FC-GS-4 stuff
 */
#define ZFCP_CT_TIMEOUT			(3 * R_A_TOV)

/******************** LOGGING MACROS AND DEFINES *****************************/

/*
 * Logging may be applied on certain kinds of driver operations
 * independently. Additionally, different log-levels are supported for
 * each of these areas.
 */

#define ZFCP_NAME               "zfcp"

/* read-only LUN sharing switch initial value */
#define ZFCP_RO_LUN_SHARING_DEFAULTS 0

/* independent log areas */
#define ZFCP_LOG_AREA_OTHER	0
#define ZFCP_LOG_AREA_SCSI	1
#define ZFCP_LOG_AREA_FSF	2
#define ZFCP_LOG_AREA_CONFIG	3
#define ZFCP_LOG_AREA_CIO	4
#define ZFCP_LOG_AREA_QDIO	5
#define ZFCP_LOG_AREA_ERP	6
#define ZFCP_LOG_AREA_FC	7

/* log level values*/
#define ZFCP_LOG_LEVEL_NORMAL	0
#define ZFCP_LOG_LEVEL_INFO	1
#define ZFCP_LOG_LEVEL_DEBUG	2
#define ZFCP_LOG_LEVEL_TRACE	3

/*
 * this allows removal of logging code by the preprocessor
 * (the most detailed log level still to be compiled in is specified, 
 * higher log levels are removed)
 */
#define ZFCP_LOG_LEVEL_LIMIT	ZFCP_LOG_LEVEL_TRACE

/* get "loglevel" nibble assignment */
#define ZFCP_GET_LOG_VALUE(zfcp_lognibble) \
	       ((atomic_read(&zfcp_data.loglevel) >> (zfcp_lognibble<<2)) & 0xF)

/* set "loglevel" nibble */
#define ZFCP_SET_LOG_NIBBLE(value, zfcp_lognibble) \
	       (value << (zfcp_lognibble << 2))

/* all log-level defaults are combined to generate initial log-level */
#define ZFCP_LOG_LEVEL_DEFAULTS \
	(ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_OTHER) | \
	 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_SCSI) | \
	 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_FSF) | \
	 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_CONFIG) | \
	 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_CIO) | \
	 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_QDIO) | \
	 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_ERP) | \
	 ZFCP_SET_LOG_NIBBLE(ZFCP_LOG_LEVEL_NORMAL, ZFCP_LOG_AREA_FC))

/* check whether we have the right level for logging */
#define ZFCP_LOG_CHECK(level) \
	((ZFCP_GET_LOG_VALUE(ZFCP_LOG_AREA)) >= level)

/* logging routine for zfcp */
#define _ZFCP_LOG(fmt, args...) \
	printk(KERN_ERR ZFCP_NAME": %s(%d): " fmt, __FUNCTION__, \
	       __LINE__ , ##args)

#define ZFCP_LOG(level, fmt, args...) \
do { \
	if (ZFCP_LOG_CHECK(level)) \
		_ZFCP_LOG(fmt, ##args); \
} while (0)
	
#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_NORMAL
# define ZFCP_LOG_NORMAL(fmt, args...)
#else
# define ZFCP_LOG_NORMAL(fmt, args...) \
do { \
	if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_NORMAL)) \
		printk(KERN_ERR ZFCP_NAME": " fmt, ##args); \
} while (0)
#endif

#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_INFO
# define ZFCP_LOG_INFO(fmt, args...)
#else
# define ZFCP_LOG_INFO(fmt, args...) \
do { \
	if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_INFO)) \
		printk(KERN_ERR ZFCP_NAME": " fmt, ##args); \
} while (0)
#endif

#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_DEBUG
# define ZFCP_LOG_DEBUG(fmt, args...)
#else
# define ZFCP_LOG_DEBUG(fmt, args...) \
	ZFCP_LOG(ZFCP_LOG_LEVEL_DEBUG, fmt , ##args)
#endif

#if ZFCP_LOG_LEVEL_LIMIT < ZFCP_LOG_LEVEL_TRACE
# define ZFCP_LOG_TRACE(fmt, args...)
#else
# define ZFCP_LOG_TRACE(fmt, args...) \
	ZFCP_LOG(ZFCP_LOG_LEVEL_TRACE, fmt , ##args)
#endif

/*************** 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
#define ZFCP_SPECIFIC_FLAGS			0x000fffff

/* common status bits */
#define ZFCP_STATUS_COMMON_REMOVE		0x80000000
#define ZFCP_STATUS_COMMON_RUNNING		0x40000000
#define ZFCP_STATUS_COMMON_ERP_FAILED		0x20000000
#define ZFCP_STATUS_COMMON_UNBLOCKED		0x10000000
#define ZFCP_STATUS_COMMON_OPENING              0x08000000
#define ZFCP_STATUS_COMMON_OPEN                 0x04000000
#define ZFCP_STATUS_COMMON_CLOSING              0x02000000
#define ZFCP_STATUS_COMMON_ERP_INUSE		0x01000000
#define ZFCP_STATUS_COMMON_ACCESS_DENIED	0x00800000
#define ZFCP_STATUS_COMMON_ACCESS_BOXED		0x00400000

/* adapter status */
#define ZFCP_STATUS_ADAPTER_QDIOUP		0x00000002
#define ZFCP_STATUS_ADAPTER_REGISTERED		0x00000004
#define ZFCP_STATUS_ADAPTER_XCONFIG_OK		0x00000008
#define ZFCP_STATUS_ADAPTER_HOST_CON_INIT	0x00000010
#define ZFCP_STATUS_ADAPTER_ERP_THREAD_UP	0x00000020
#define ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL	0x00000080
#define ZFCP_STATUS_ADAPTER_ERP_PENDING		0x00000100
#define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED	0x00000200
#define ZFCP_STATUS_ADAPTER_XPORT_OK		0x00000800

#define ZFCP_STATUS_ADAPTER_SCSI_UP			\
		(ZFCP_STATUS_COMMON_UNBLOCKED |	\
		 ZFCP_STATUS_ADAPTER_REGISTERED)


/* FC-PH/FC-GS well-known address identifiers for generic services */
#define ZFCP_DID_MANAGEMENT_SERVICE		0xFFFFFA
#define ZFCP_DID_TIME_SERVICE			0xFFFFFB
#define ZFCP_DID_DIRECTORY_SERVICE		0xFFFFFC
#define ZFCP_DID_ALIAS_SERVICE			0xFFFFF8
#define ZFCP_DID_KEY_DISTRIBUTION_SERVICE	0xFFFFF7

/* remote port status */
#define ZFCP_STATUS_PORT_PHYS_OPEN		0x00000001
#define ZFCP_STATUS_PORT_DID_DID		0x00000002
#define ZFCP_STATUS_PORT_PHYS_CLOSING		0x00000004
#define ZFCP_STATUS_PORT_NO_WWPN		0x00000008
#define ZFCP_STATUS_PORT_NO_SCSI_ID		0x00000010
#define ZFCP_STATUS_PORT_INVALID_WWPN		0x00000020
#define ZFCP_STATUS_PORT_ACCESS_DENIED		0x00000040

/* for ports with well known addresses */
#define ZFCP_STATUS_PORT_WKA \
		(ZFCP_STATUS_PORT_NO_WWPN | \
		 ZFCP_STATUS_PORT_NO_SCSI_ID)

/* logical unit status */
#define ZFCP_STATUS_UNIT_NOTSUPPUNITRESET	0x00000001
#define ZFCP_STATUS_UNIT_TEMPORARY		0x00000002
#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_NOT_INIT		0x00000000
#define ZFCP_STATUS_FSFREQ_POOL  		0x00000001
#define ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT	0x00000002
#define ZFCP_STATUS_FSFREQ_COMPLETED		0x00000004
#define ZFCP_STATUS_FSFREQ_ERROR		0x00000008
#define ZFCP_STATUS_FSFREQ_CLEANUP		0x00000010
#define ZFCP_STATUS_FSFREQ_ABORTING		0x00000020
#define ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED	0x00000040
#define ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED       0x00000080
#define ZFCP_STATUS_FSFREQ_ABORTED              0x00000100
#define ZFCP_STATUS_FSFREQ_TMFUNCFAILED         0x00000200
#define ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP        0x00000400
#define ZFCP_STATUS_FSFREQ_RETRY                0x00000800
#define ZFCP_STATUS_FSFREQ_DISMISSED            0x00001000

/*********************** ERROR RECOVERY PROCEDURE DEFINES ********************/

#define ZFCP_MAX_ERPS                   3

#define ZFCP_ERP_FSFREQ_TIMEOUT		(30 * HZ)
#define ZFCP_ERP_MEMWAIT_TIMEOUT	HZ

#define ZFCP_STATUS_ERP_TIMEDOUT	0x10000000
#define ZFCP_STATUS_ERP_CLOSE_ONLY	0x01000000
#define ZFCP_STATUS_ERP_DISMISSING	0x00100000
#define ZFCP_STATUS_ERP_DISMISSED	0x00200000
#define ZFCP_STATUS_ERP_LOWMEM		0x00400000

#define ZFCP_ERP_STEP_UNINITIALIZED	0x00000000
#define ZFCP_ERP_STEP_FSF_XCONFIG	0x00000001
#define ZFCP_ERP_STEP_PHYS_PORT_CLOSING	0x00000010
#define ZFCP_ERP_STEP_PORT_CLOSING	0x00000100
#define ZFCP_ERP_STEP_NAMESERVER_OPEN	0x00000200
#define ZFCP_ERP_STEP_NAMESERVER_LOOKUP	0x00000400
#define ZFCP_ERP_STEP_PORT_OPENING	0x00000800
#define ZFCP_ERP_STEP_UNIT_CLOSING	0x00001000
#define ZFCP_ERP_STEP_UNIT_OPENING	0x00002000

/* Ordered by escalation level (necessary for proper erp-code operation) */
#define ZFCP_ERP_ACTION_REOPEN_ADAPTER		0x4
#define ZFCP_ERP_ACTION_REOPEN_PORT_FORCED	0x3
#define ZFCP_ERP_ACTION_REOPEN_PORT		0x2
#define ZFCP_ERP_ACTION_REOPEN_UNIT		0x1

#define ZFCP_ERP_ACTION_RUNNING			0x1
#define ZFCP_ERP_ACTION_READY			0x2

#define ZFCP_ERP_SUCCEEDED	0x0
#define ZFCP_ERP_FAILED		0x1
#define ZFCP_ERP_CONTINUES	0x2
#define ZFCP_ERP_EXIT		0x3
#define ZFCP_ERP_DISMISSED	0x4
#define ZFCP_ERP_NOMEM		0x5


/******************** CFDC SPECIFIC STUFF *****************************/

/* Firewall data channel sense data record */
struct zfcp_cfdc_sense_data {
	u32 signature;           /* Request signature */
	u32 devno;               /* FCP adapter device number */
	u32 command;             /* Command code */
	u32 fsf_status;          /* FSF request status and status qualifier */
	u8  fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE];
	u8  payloads[256];       /* Access conflicts list */
	u8  control_file[0];     /* Access control table */
};

#define ZFCP_CFDC_SIGNATURE			0xCFDCACDF

#define ZFCP_CFDC_CMND_DOWNLOAD_NORMAL		0x00010001
#define ZFCP_CFDC_CMND_DOWNLOAD_FORCE		0x00010101
#define ZFCP_CFDC_CMND_FULL_ACCESS		0x00000201
#define ZFCP_CFDC_CMND_RESTRICTED_ACCESS	0x00000401
#define ZFCP_CFDC_CMND_UPLOAD			0x00010002

#define ZFCP_CFDC_DOWNLOAD			0x00000001
#define ZFCP_CFDC_UPLOAD			0x00000002
#define ZFCP_CFDC_WITH_CONTROL_FILE		0x00010000

#define ZFCP_CFDC_DEV_NAME			"zfcp_cfdc"
#define ZFCP_CFDC_DEV_MAJOR			MISC_MAJOR
#define ZFCP_CFDC_DEV_MINOR			MISC_DYNAMIC_MINOR

#define ZFCP_CFDC_MAX_CONTROL_FILE_SIZE		127 * 1024

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

struct zfcp_fsf_req;

/* holds various memory pools of an adapter */
struct zfcp_adapter_mempool {
	mempool_t *fsf_req_erp;
	mempool_t *fsf_req_scsi;
	mempool_t *fsf_req_abort;
	mempool_t *fsf_req_status_read;
	mempool_t *data_status_read;
	mempool_t *data_gid_pn;
};

/*
 * header for CT_IU
 */
struct ct_hdr {
	u8 revision;		// 0x01
	u8 in_id[3];		// 0x00
	u8 gs_type;		// 0xFC	Directory Service
	u8 gs_subtype;		// 0x02	Name Server
	u8 options;		// 0x00 single bidirectional exchange
	u8 reserved0;
	u16 cmd_rsp_code;	// 0x0121 GID_PN, or 0x0100 GA_NXT
	u16 max_res_size;	// <= (4096 - 16) / 4
	u8 reserved1;
	u8 reason_code;
	u8 reason_code_expl;
	u8 vendor_unique;
} __attribute__ ((packed));

/* nameserver request CT_IU -- for requests where
 * a port name is required */
struct ct_iu_gid_pn_req {