diff options
Diffstat (limited to 'drivers/s390/scsi/zfcp_def.h')
| -rw-r--r-- | drivers/s390/scsi/zfcp_def.h | 78 |
1 files changed, 58 insertions, 20 deletions
diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h index e1c6b6e05a75..9ae1d0a6f627 100644 --- a/drivers/s390/scsi/zfcp_def.h +++ b/drivers/s390/scsi/zfcp_def.h @@ -85,8 +85,8 @@ struct zfcp_reqlist; #define ZFCP_STATUS_PORT_LINK_TEST 0x00000002 /* logical unit status */ -#define ZFCP_STATUS_UNIT_SHARED 0x00000004 -#define ZFCP_STATUS_UNIT_READONLY 0x00000008 +#define ZFCP_STATUS_LUN_SHARED 0x00000004 +#define ZFCP_STATUS_LUN_READONLY 0x00000008 /* FSF request status (this does not have a common part) */ #define ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT 0x00000002 @@ -118,7 +118,7 @@ struct zfcp_erp_action { int action; /* requested action code */ struct zfcp_adapter *adapter; /* device which should be recovered */ struct zfcp_port *port; - struct zfcp_unit *unit; + struct scsi_device *sdev; u32 status; /* recovery status */ u32 step; /* active step of this erp action */ unsigned long fsf_req_id; @@ -219,21 +219,66 @@ struct zfcp_port { 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; /* 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 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 @@ -249,7 +294,6 @@ struct zfcp_unit { * @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 { @@ -267,7 +311,6 @@ struct zfcp_fsf_req { struct zfcp_erp_action *erp_action; mempool_t *pool; unsigned long long issued; - struct zfcp_unit *unit; void (*handler)(struct zfcp_fsf_req *); }; @@ -282,9 +325,4 @@ struct zfcp_data { struct kmem_cache *adisc_cache; }; -/********************** ZFCP SPECIFIC DEFINES ********************************/ - -#define ZFCP_SET 0x00000100 -#define ZFCP_CLEAR 0x00000200 - #endif /* ZFCP_DEF_H */ |