diff options
Diffstat (limited to 'drivers/s390/scsi/zfcp_def.h')
| -rw-r--r-- | drivers/s390/scsi/zfcp_def.h | 113 |
1 files changed, 68 insertions, 45 deletions
diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h index 3396a47721a7..87d2f47a6990 100644 --- a/drivers/s390/scsi/zfcp_def.h +++ b/drivers/s390/scsi/zfcp_def.h @@ -4,7 +4,7 @@ * * Global definitions for the zfcp device driver. * - * Copyright IBM Corp. 2002, 2010 + * Copyright IBM Corp. 2002, 2017 */ #ifndef ZFCP_DEF_H @@ -41,24 +41,16 @@ #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 + * Note, the leftmost 12 status bits (3 nibbles) are common among adapter, port + * and unit. This is a mask for bitwise 'and' with status values. */ #define ZFCP_COMMON_FLAGS 0xfff00000 @@ -97,49 +89,60 @@ struct zfcp_reqlist; /************************* STRUCTURE DEFINITIONS *****************************/ -struct zfcp_fsf_req; +/** + * enum zfcp_erp_act_type - Type of ERP action object. + * @ZFCP_ERP_ACTION_REOPEN_LUN: LUN recovery. + * @ZFCP_ERP_ACTION_REOPEN_PORT: Port recovery. + * @ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: Forced port recovery. + * @ZFCP_ERP_ACTION_REOPEN_ADAPTER: Adapter recovery. + * + * Values must fit into u8 because of code dependencies: + * zfcp_dbf_rec_trig(), &zfcp_dbf_rec_trigger.want, &zfcp_dbf_rec_trigger.need; + * zfcp_dbf_rec_run_lvl(), zfcp_dbf_rec_run(), &zfcp_dbf_rec_running.rec_action. + */ +enum zfcp_erp_act_type { + ZFCP_ERP_ACTION_REOPEN_LUN = 1, + ZFCP_ERP_ACTION_REOPEN_PORT = 2, + ZFCP_ERP_ACTION_REOPEN_PORT_FORCED = 3, + ZFCP_ERP_ACTION_REOPEN_ADAPTER = 4, +}; -/* 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; +/* + * Values must fit into u16 because of code dependencies: + * zfcp_dbf_rec_run_lvl(), zfcp_dbf_rec_run(), zfcp_dbf_rec_run_wka(), + * &zfcp_dbf_rec_running.rec_step. + */ +enum zfcp_erp_steps { + ZFCP_ERP_STEP_UNINITIALIZED = 0x0000, + ZFCP_ERP_STEP_PHYS_PORT_CLOSING = 0x0010, + ZFCP_ERP_STEP_PORT_CLOSING = 0x0100, + ZFCP_ERP_STEP_PORT_OPENING = 0x0800, + ZFCP_ERP_STEP_LUN_CLOSING = 0x1000, + ZFCP_ERP_STEP_LUN_OPENING = 0x2000, }; struct zfcp_erp_action { struct list_head list; - int action; /* requested action code */ + enum zfcp_erp_act_type type; /* 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 */ + enum zfcp_erp_steps 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; +/* 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_adapter { @@ -220,6 +223,25 @@ struct zfcp_port { unsigned int starget_id; }; +struct zfcp_latency_record { + u32 min; + u32 max; + u64 sum; +}; + +struct zfcp_latency_cont { + struct zfcp_latency_record channel; + struct zfcp_latency_record fabric; + u64 counter; +}; + +struct zfcp_latencies { + struct zfcp_latency_cont read; + struct zfcp_latency_cont write; + struct zfcp_latency_cont cmd; + spinlock_t lock; +}; + /** * struct zfcp_unit - LUN configured via zfcp sysfs * @dev: struct device for sysfs representation and reference counting @@ -287,9 +309,7 @@ static inline u64 zfcp_scsi_dev_lun(struct scsi_device *sdev) * @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 @@ -304,9 +324,7 @@ struct zfcp_fsf_req { 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; @@ -321,4 +339,9 @@ int zfcp_adapter_multi_buffer_active(struct zfcp_adapter *adapter) return atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_MB_ACT; } +static inline bool zfcp_fsf_req_is_status_read_buffer(struct zfcp_fsf_req *req) +{ + return req->qtcb == NULL; +} + #endif /* ZFCP_DEF_H */ |