diff options
Diffstat (limited to 'drivers/s390/block/dasd_int.h')
| -rw-r--r-- | drivers/s390/block/dasd_int.h | 209 |
1 files changed, 127 insertions, 82 deletions
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h index d427daeef511..44b2984dfbee 100644 --- a/drivers/s390/block/dasd_int.h +++ b/drivers/s390/block/dasd_int.h @@ -64,13 +64,7 @@ * SECTION: Type definitions */ struct dasd_device; - -typedef enum { - dasd_era_fatal = -1, /* no chance to recover */ - dasd_era_none = 0, /* don't recover, everything alright */ - dasd_era_msg = 1, /* don't recover, just report... */ - dasd_era_recover = 2 /* recovery action recommended */ -} dasd_era_t; +struct dasd_block; /* BIT DEFINITIONS FOR SENSE DATA */ #define DASD_SENSE_BIT_0 0x80 @@ -151,19 +145,22 @@ do { \ struct dasd_ccw_req { unsigned int magic; /* Eye catcher */ - struct list_head list; /* list_head for request queueing. */ + struct list_head devlist; /* for dasd_device request queue */ + struct list_head blocklist; /* for dasd_block request queue */ /* Where to execute what... */ - struct dasd_device *device; /* device the request is for */ + struct dasd_block *block; /* the originating block device */ + struct dasd_device *memdev; /* the device used to allocate this */ + struct dasd_device *startdev; /* device the request is started on */ struct ccw1 *cpaddr; /* address of channel program */ - char status; /* status of this request */ + char status; /* status of this request */ short retries; /* A retry counter */ unsigned long flags; /* flags of this request */ /* ... and how */ unsigned long starttime; /* jiffies time of request start */ int expires; /* expiration period in jiffies */ - char lpm; /* logical path mask */ + char lpm; /* logical path mask */ void *data; /* pointer to data area */ /* these are important for recovering erroneous requests */ @@ -178,20 +175,27 @@ struct dasd_ccw_req { unsigned long long endclk; /* TOD-clock of request termination */ /* Callback that is called after reaching final status. */ - void (*callback)(struct dasd_ccw_req *, void *data); - void *callback_data; + void (*callback)(struct dasd_ccw_req *, void *data); + void *callback_data; }; /* * dasd_ccw_req -> status can be: */ -#define DASD_CQR_FILLED 0x00 /* request is ready to be processed */ -#define DASD_CQR_QUEUED 0x01 /* request is queued to be processed */ -#define DASD_CQR_IN_IO 0x02 /* request is currently in IO */ -#define DASD_CQR_DONE 0x03 /* request is completed successfully */ -#define DASD_CQR_ERROR 0x04 /* request is completed with error */ -#define DASD_CQR_FAILED 0x05 /* request is finally failed */ -#define DASD_CQR_CLEAR 0x06 /* request is clear pending */ +#define DASD_CQR_FILLED 0x00 /* request is ready to be processed */ +#define DASD_CQR_DONE 0x01 /* request is completed successfully */ +#define DASD_CQR_NEED_ERP 0x02 /* request needs recovery action */ +#define DASD_CQR_IN_ERP 0x03 /* request is in recovery */ +#define DASD_CQR_FAILED 0x04 /* request is finally failed */ +#define DASD_CQR_TERMINATED 0x05 /* request was stopped by driver */ + +#define DASD_CQR_QUEUED 0x80 /* request is queued to be processed */ +#define DASD_CQR_IN_IO 0x81 /* request is currently in IO */ +#define DASD_CQR_ERROR 0x82 /* request is completed with error */ +#define DASD_CQR_CLEAR_PENDING 0x83 /* request is clear pending */ +#define DASD_CQR_CLEARED 0x84 /* request was cleared */ +#define DASD_CQR_SUCCESS 0x85 /* request was successfull */ + /* per dasd_ccw_req flags */ #define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */ @@ -214,52 +218,71 @@ struct dasd_discipline { struct list_head list; /* used for list of disciplines */ - /* - * Device recognition functions. check_device is used to verify - * the sense data and the information returned by read device - * characteristics. It returns 0 if the discipline can be used - * for the device in question. - * do_analysis is used in the step from device state "basic" to - * state "accept". It returns 0 if the device can be made ready, - * it returns -EMEDIUMTYPE if the device can't be made ready or - * -EAGAIN if do_analysis started a ccw that needs to complete - * before the analysis may be repeated. - */ - int (*check_device)(struct dasd_device *); - int (*do_analysis) (struct dasd_device *); - - /* - * Device operation functions. build_cp creates a ccw chain for - * a block device request, start_io starts the request and - * term_IO cancels it (e.g. in case of a timeout). format_device - * returns a ccw chain to be used to format the device. - */ + /* + * Device recognition functions. check_device is used to verify + * the sense data and the information returned by read device + * characteristics. It returns 0 if the discipline can be used + * for the device in question. uncheck_device is called during + * device shutdown to deregister a device from its discipline. + */ + int (*check_device) (struct dasd_device *); + void (*uncheck_device) (struct dasd_device *); + + /* + * do_analysis is used in the step from device state "basic" to + * state "accept". It returns 0 if the device can be made ready, + * it returns -EMEDIUMTYPE if the device can't be made ready or + * -EAGAIN if do_analysis started a ccw that needs to complete + * before the analysis may be repeated. + */ + int (*do_analysis) (struct dasd_block *); + + /* + * Last things to do when a device is set online, and first things + * when it is set offline. + */ + int (*ready_to_online) (struct dasd_device *); + int (*online_to_ready) (struct dasd_device *); + + /* + * Device operation functions. build_cp creates a ccw chain for + * a block device request, start_io starts the request and + * term_IO cancels it (e.g. in case of a timeout). format_device + * returns a ccw chain to be used to format the device. + * handle_terminated_request allows to examine a cqr and prepare + * it for retry. + */ struct dasd_ccw_req *(*build_cp) (struct dasd_device *, + struct dasd_block *, struct request *); int (*start_IO) (struct dasd_ccw_req *); int (*term_IO) (struct dasd_ccw_req *); + void (*handle_terminated_request) (struct dasd_ccw_req *); struct dasd_ccw_req *(*format_device) (struct dasd_device *, struct format_data_t *); int (*free_cp) (struct dasd_ccw_req *, struct request *); - /* - * Error recovery functions. examine_error() returns a value that - * indicates what to do for an error condition. If examine_error() + + /* + * Error recovery functions. examine_error() returns a value that + * indicates what to do for an error condition. If examine_error() * returns 'dasd_era_recover' erp_action() is called to create a - * special error recovery ccw. erp_postaction() is called after - * an error recovery ccw has finished its execution. dump_sense - * is called for every error condition to print the sense data - * to the console. - */ - dasd_era_t(*examine_error) (struct dasd_ccw_req *, struct irb *); + * special error recovery ccw. erp_postaction() is called after + * an error recovery ccw has finished its execution. dump_sense + * is called for every error condition to print the sense data + * to the console. + */ dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *); dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *); void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *, struct irb *); + void (*handle_unsolicited_interrupt) (struct dasd_device *, + struct irb *); + /* i/o control functions. */ - int (*fill_geometry) (struct dasd_device *, struct hd_geometry *); + int (*fill_geometry) (struct dasd_block *, struct hd_geometry *); int (*fill_info) (struct dasd_device *, struct dasd_information2_t *); - int (*ioctl) (struct dasd_device *, unsigned int, void __user *); + int (*ioctl) (struct dasd_block *, unsigned int, void __user *); }; extern struct dasd_discipline *dasd_diag_discipline_pointer; @@ -267,12 +290,18 @@ extern struct dasd_discipline *dasd_diag_discipline_pointer; /* * Unique identifier for dasd device. */ +#define UA_NOT_CONFIGURED 0x00 +#define UA_BASE_DEVICE 0x01 +#define UA_BASE_PAV_ALIAS 0x02 +#define UA_HYPER_PAV_ALIAS 0x03 + struct dasd_uid { - __u8 alias; + __u8 type; char vendor[4]; char serial[15]; __u16 ssid; - __u8 unit_addr; + __u8 real_unit_addr; + __u8 base_unit_addr; }; /* @@ -293,14 +322,9 @@ struct dasd_uid { struct dasd_device { /* Block device stuff. */ - struct gendisk *gdp; - struct request_queue *request_queue; - spinlock_t request_queue_lock; - struct block_device *bdev; + struct dasd_block *block; + unsigned int devindex; - unsigned long blocks; /* size of volume in blocks */ - unsigned int bp_block; /* bytes per block */ - unsigned int s2b_shift; /* log2 (bp_block/512) */ unsigned long flags; /* per device flags */ unsigned short features; /* copy of devmap-features (read-only!) */ @@ -316,9 +340,8 @@ struct dasd_device { int state, target; int stopped; /* device (ccw_device_start) was stopped */ - /* Open and reference count. */ + /* reference count. */ atomic_t ref_count; - atomic_t open_count; /* ccw queue and memory for static ccw/erp buffers. */ struct list_head ccw_queue; @@ -337,20 +360,45 @@ struct dasd_device { struct ccw_device *cdev; + /* hook for alias management */ + struct list_head alias_list; +}; + +struct dasd_block { + /* Block device stuff. */ + struct gendisk *gdp; + struct request_queue *request_queue; + spinlock_t request_queue_lock; + struct block_device *bdev; + atomic_t open_count; + + unsigned long blocks; /* size of volume in blocks */ + unsigned int bp_block; /* bytes per block */ + unsigned int s2b_shift; /* log2 (bp_block/512) */ + + struct dasd_device *base; + struct list_head ccw_queue; + spinlock_t queue_lock; + + atomic_t tasklet_scheduled; + struct tasklet_struct tasklet; + struct timer_list timer; + #ifdef CONFIG_DASD_PROFILE struct dasd_profile_info_t profile; #endif }; + + /* reasons why device (ccw_device_start) was stopped */ #define DASD_STOPPED_NOT_ACC 1 /* not accessible */ #define DASD_STOPPED_QUIESCE 2 /* Quiesced */ #define DASD_STOPPED_PENDING 4 /* long busy */ #define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */ -#define DASD_STOPPED_DC_EIO 16 /* disconnected, return -EIO */ +#define DASD_STOPPED_SU 16 /* summary unit check handling */ /* per device flags */ -#define DASD_FLAG_DSC_ERROR 2 /* return -EIO when disconnected */ #define DASD_FLAG_OFFLINE 3 /* device is in offline processing */ #define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */ #define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */ @@ -489,6 +537,9 @@ dasd_kmalloc_set_cda(struct ccw1 *ccw, void *cda, struct dasd_device *device) struct dasd_device *dasd_alloc_device(void); void dasd_free_device(struct dasd_device *); +struct dasd_block *dasd_alloc_block(void); +void dasd_free_block(struct dasd_block *); + void dasd_enable_device(struct dasd_device *); void dasd_set_target_state(struct dasd_device *, int); void dasd_kick_device(struct dasd_device *); @@ -497,18 +548,23 @@ void dasd_add_request_head(struct dasd_ccw_req *); void dasd_add_request_tail(struct dasd_ccw_req *); int dasd_start_IO(struct dasd_ccw_req *); int dasd_term_IO(struct dasd_ccw_req *); -void dasd_schedule_bh(struct dasd_device *); +void dasd_schedule_device_bh(struct dasd_device *); +void dasd_schedule_block_bh(struct dasd_block *); int dasd_sleep_on(struct dasd_ccw_req *); int dasd_sleep_on_immediatly(struct dasd_ccw_req *); int dasd_sleep_on_interruptible(struct dasd_ccw_req *); -void dasd_set_timer(struct dasd_device *, int); -void dasd_clear_timer(struct dasd_device *); +void dasd_device_set_timer(struct dasd_device *, int); +void dasd_device_clear_timer(struct dasd_device *); +void dasd_block_set_timer(struct dasd_block *, int); +void dasd_block_clear_timer(struct dasd_block *); int dasd_cancel_req(struct dasd_ccw_req *); +int dasd_flush_device_queue(struct dasd_device *); int dasd_generic_probe (struct ccw_device *, struct dasd_discipline *); void dasd_generic_remove (struct ccw_device *cdev); int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *); int dasd_generic_set_offline (struct ccw_device *cdev); int dasd_generic_notify(struct ccw_device *, int); +void dasd_generic_handle_state_change(struct dasd_device *); int dasd_generic_read_dev_chars(struct dasd_device *, char *, void **, int); @@ -542,10 +598,10 @@ int dasd_busid_known(char *); /* externals in dasd_gendisk.c */ int dasd_gendisk_init(void); void dasd_gendisk_exit(void); -int dasd_gendisk_alloc(struct dasd_device *); -void dasd_gendisk_free(struct dasd_device *); -int dasd_scan_partitions(struct dasd_device *); -void dasd_destroy_partitions(struct dasd_device *); +int dasd_gendisk_alloc(struct dasd_block *); +void dasd_gendisk_free(struct dasd_block *); +int dasd_scan_partitions(struct dasd_block *); +void dasd_destroy_partitions(struct dasd_block *); /* externals in dasd_ioctl.c */ int dasd_ioctl(struct inode *, struct file *, unsigned int, unsigned long); @@ -563,20 +619,9 @@ struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int, void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *); void dasd_log_sense(struct dasd_ccw_req *, struct irb *); -/* externals in dasd_3370_erp.c */ -dasd_era_t dasd_3370_erp_examine(struct dasd_ccw_req *, struct irb *); - /* externals in dasd_3990_erp.c */ -dasd_era_t dasd_3990_erp_examine(struct dasd_ccw_req *, struct irb *); struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *); -/* externals in dasd_9336_erp.c */ -dasd_era_t dasd_9336_erp_examine(struct dasd_ccw_req *, struct irb *); - -/* externals in dasd_9336_erp.c */ -dasd_era_t dasd_9343_erp_examine(struct dasd_ccw_req *, struct irb *); -struct dasd_ccw_req *dasd_9343_erp_action(struct dasd_ccw_req *); - /* externals in dasd_eer.c */ #ifdef CONFIG_DASD_EER int dasd_eer_init(void); 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