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kernel-fxtec-pro1x/drivers/s390/scsi/zfcp_def.h
Christof Schmitt 34c2b71299 [SCSI] zfcp: Introduce header file for qdio structs and inline functions 
Move the qdio related structs and some helper functions to a new
zfcp_qdio.h header file. While doing this, rename the struct
zfcp_queue_req to zfcp_qdio_req to adhere to the naming scheme used in
zfcp. This allows a better seperation of the qdio code and inlining
the helper functions will save some function calls.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-02-17 17:46:35 -06:00

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/*
* zfcp device driver
*
* Global definitions for the zfcp device driver.
*
* Copyright IBM Corporation 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_qdio.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_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_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 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;
};
struct zfcp_unit {
struct device dev;
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_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)
* @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_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;
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 */
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