| #ifndef S390_IO_SCH_H |
| #define S390_IO_SCH_H |
| |
| #include <linux/types.h> |
| #include <asm/schid.h> |
| #include <asm/ccwdev.h> |
| #include <asm/irq.h> |
| #include "css.h" |
| #include "orb.h" |
| |
| struct io_subchannel_private { |
| union orb orb; /* operation request block */ |
| struct ccw1 sense_ccw; /* static ccw for sense command */ |
| struct ccw_device *cdev;/* pointer to the child ccw device */ |
| struct { |
| unsigned int suspend:1; /* allow suspend */ |
| unsigned int prefetch:1;/* deny prefetch */ |
| unsigned int inter:1; /* suppress intermediate interrupts */ |
| } __packed options; |
| } __aligned(8); |
| |
| #define to_io_private(n) ((struct io_subchannel_private *) \ |
| dev_get_drvdata(&(n)->dev)) |
| #define set_io_private(n, p) (dev_set_drvdata(&(n)->dev, p)) |
| |
| static inline struct ccw_device *sch_get_cdev(struct subchannel *sch) |
| { |
| struct io_subchannel_private *priv = to_io_private(sch); |
| return priv ? priv->cdev : NULL; |
| } |
| |
| static inline void sch_set_cdev(struct subchannel *sch, |
| struct ccw_device *cdev) |
| { |
| struct io_subchannel_private *priv = to_io_private(sch); |
| if (priv) |
| priv->cdev = cdev; |
| } |
| |
| #define MAX_CIWS 8 |
| |
| /* |
| * Possible status values for a CCW request's I/O. |
| */ |
| enum io_status { |
| IO_DONE, |
| IO_RUNNING, |
| IO_STATUS_ERROR, |
| IO_PATH_ERROR, |
| IO_REJECTED, |
| IO_KILLED |
| }; |
| |
| /** |
| * ccw_request - Internal CCW request. |
| * @cp: channel program to start |
| * @timeout: maximum allowable time in jiffies between start I/O and interrupt |
| * @maxretries: number of retries per I/O operation and path |
| * @lpm: mask of paths to use |
| * @check: optional callback that determines if results are final |
| * @filter: optional callback to adjust request status based on IRB data |
| * @callback: final callback |
| * @data: user-defined pointer passed to all callbacks |
| * @singlepath: if set, use only one path from @lpm per start I/O |
| * @cancel: non-zero if request was cancelled |
| * @done: non-zero if request was finished |
| * @mask: current path mask |
| * @retries: current number of retries |
| * @drc: delayed return code |
| */ |
| struct ccw_request { |
| struct ccw1 *cp; |
| unsigned long timeout; |
| u16 maxretries; |
| u8 lpm; |
| int (*check)(struct ccw_device *, void *); |
| enum io_status (*filter)(struct ccw_device *, void *, struct irb *, |
| enum io_status); |
| void (*callback)(struct ccw_device *, void *, int); |
| void *data; |
| unsigned int singlepath:1; |
| /* These fields are used internally. */ |
| unsigned int cancel:1; |
| unsigned int done:1; |
| u16 mask; |
| u16 retries; |
| int drc; |
| } __attribute__((packed)); |
| |
| /* |
| * sense-id response buffer layout |
| */ |
| struct senseid { |
| /* common part */ |
| u8 reserved; /* always 0x'FF' */ |
| u16 cu_type; /* control unit type */ |
| u8 cu_model; /* control unit model */ |
| u16 dev_type; /* device type */ |
| u8 dev_model; /* device model */ |
| u8 unused; /* padding byte */ |
| /* extended part */ |
| struct ciw ciw[MAX_CIWS]; /* variable # of CIWs */ |
| } __attribute__ ((packed, aligned(4))); |
| |
| enum cdev_todo { |
| CDEV_TODO_NOTHING, |
| CDEV_TODO_ENABLE_CMF, |
| CDEV_TODO_REBIND, |
| CDEV_TODO_REGISTER, |
| CDEV_TODO_UNREG, |
| CDEV_TODO_UNREG_EVAL, |
| }; |
| |
| #define FAKE_CMD_IRB 1 |
| #define FAKE_TM_IRB 2 |
| |
| struct ccw_device_private { |
| struct ccw_device *cdev; |
| struct subchannel *sch; |
| int state; /* device state */ |
| atomic_t onoff; |
| struct ccw_dev_id dev_id; /* device id */ |
| struct ccw_request req; /* internal I/O request */ |
| int iretry; |
| u8 pgid_valid_mask; /* mask of valid PGIDs */ |
| u8 pgid_todo_mask; /* mask of PGIDs to be adjusted */ |
| u8 pgid_reset_mask; /* mask of PGIDs which were reset */ |
| u8 path_noirq_mask; /* mask of paths for which no irq was |
| received */ |
| u8 path_notoper_mask; /* mask of paths which were found |
| not operable */ |
| u8 path_gone_mask; /* mask of paths, that became unavailable */ |
| u8 path_new_mask; /* mask of paths, that became available */ |
| u8 path_broken_mask; /* mask of paths, which were found to be |
| unusable */ |
| struct { |
| unsigned int fast:1; /* post with "channel end" */ |
| unsigned int repall:1; /* report every interrupt status */ |
| unsigned int pgroup:1; /* do path grouping */ |
| unsigned int force:1; /* allow forced online */ |
| unsigned int mpath:1; /* do multipathing */ |
| } __attribute__ ((packed)) options; |
| struct { |
| unsigned int esid:1; /* Ext. SenseID supported by HW */ |
| unsigned int dosense:1; /* delayed SENSE required */ |
| unsigned int doverify:1; /* delayed path verification */ |
| unsigned int donotify:1; /* call notify function */ |
| unsigned int recog_done:1; /* dev. recog. complete */ |
| unsigned int fake_irb:2; /* deliver faked irb */ |
| unsigned int resuming:1; /* recognition while resume */ |
| unsigned int pgroup:1; /* pathgroup is set up */ |
| unsigned int mpath:1; /* multipathing is set up */ |
| unsigned int pgid_unknown:1;/* unknown pgid state */ |
| unsigned int initialized:1; /* set if initial reference held */ |
| } __attribute__((packed)) flags; |
| unsigned long intparm; /* user interruption parameter */ |
| struct qdio_irq *qdio_data; |
| struct irb irb; /* device status */ |
| struct senseid senseid; /* SenseID info */ |
| struct pgid pgid[8]; /* path group IDs per chpid*/ |
| struct ccw1 iccws[2]; /* ccws for SNID/SID/SPGID commands */ |
| struct work_struct todo_work; |
| enum cdev_todo todo; |
| wait_queue_head_t wait_q; |
| struct timer_list timer; |
| void *cmb; /* measurement information */ |
| struct list_head cmb_list; /* list of measured devices */ |
| u64 cmb_start_time; /* clock value of cmb reset */ |
| void *cmb_wait; /* deferred cmb enable/disable */ |
| enum interruption_class int_class; |
| }; |
| |
| #endif |