* Horst Hummel <Horst.Hummel@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
* Bugreports.to..: <Linux390@de.ibm.com>
- * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
- *
+ * Copyright IBM Corp. 1999, 2009
*/
#ifndef DASD_INT_H
#include <linux/genhd.h>
#include <linux/hdreg.h>
#include <linux/interrupt.h>
+#include <linux/log2.h>
#include <asm/ccwdev.h>
#include <linux/workqueue.h>
#include <asm/debug.h>
#include <asm/dasd.h>
#include <asm/idals.h>
+/* DASD discipline magic */
+#define DASD_ECKD_MAGIC 0xC5C3D2C4
+#define DASD_DIAG_MAGIC 0xC4C9C1C7
+#define DASD_FBA_MAGIC 0xC6C2C140
+
/*
* 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
#define DASD_SENSE_BIT_2 0x20
#define DASD_SENSE_BIT_3 0x10
+/* BIT DEFINITIONS FOR SIM SENSE */
+#define DASD_SIM_SENSE 0x0F
+#define DASD_SIM_MSG_TO_OP 0x03
+#define DASD_SIM_LOG 0x0C
+
/*
* SECTION: MACROs for klogd and s390 debug feature (dbf)
*/
d_data); \
} while(0)
+/* limit size for an errorstring */
+#define ERRORLENGTH 30
+
/* definition of dbf debug levels */
#define DBF_EMERG 0 /* system is unusable */
#define DBF_ALERT 1 /* action must be taken immediately */
#define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\
do { \
printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
- d_device->cdev->dev.bus_id, d_args); \
+ dev_name(&d_device->cdev->dev), d_args); \
DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \
} while(0)
#define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\
do { \
printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
- d_device->cdev->dev.bus_id, d_args); \
+ dev_name(&d_device->cdev->dev), d_args); \
} while(0)
#define MESSAGE_LOG(d_loglevel,d_string,d_args...)\
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 ccw1 *cpaddr; /* address of channel program */
- char status; /* status of this request */
+ 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 */
+ void *cpaddr; /* address of ccw or tcw */
+ unsigned char cpmode; /* 0 = cmd mode, 1 = itcw */
+ 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 */
+ int intrc; /* internal error, e.g. from start_IO */
struct irb irb; /* device status in case of an error */
struct dasd_ccw_req *refers; /* ERP-chain queueing. */
void *function; /* originating ERP action */
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 successful */
+
/* per dasd_ccw_req flags */
#define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */
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 (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *);
+
+ 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 *);
+
+ /* suspend/resume functions */
+ int (*freeze) (struct dasd_device *);
+ int (*restore) (struct dasd_device *);
};
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;
+ char vduit[33];
};
/*
struct dasd_device {
/* Block device stuff. */
- struct gendisk *gdp;
- request_queue_t *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!) */
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;
atomic_t tasklet_scheduled;
struct tasklet_struct tasklet;
struct work_struct kick_work;
+ struct work_struct restore_device;
struct timer_list timer;
debug_info_t *debug_area;
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 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 */
+#define DASD_STOPPED_PM 32 /* pm state transition */
+#define DASD_UNRESUMED_PM 64 /* pm resume failed state */
/* 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 */
static inline int
dasd_check_blocksize(int bsize)
{
- if (bsize < 512 || bsize > 4096 || (bsize & (bsize - 1)) != 0)
+ if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize))
return -EMEDIUMTYPE;
return 0;
}
extern debug_info_t *dasd_debug_area;
extern struct dasd_profile_info_t dasd_global_profile;
extern unsigned int dasd_profile_level;
-extern struct block_device_operations dasd_device_operations;
+extern const struct block_device_operations dasd_device_operations;
extern struct kmem_cache *dasd_page_cache;
struct dasd_ccw_req *
-dasd_kmalloc_request(char *, int, int, struct dasd_device *);
+dasd_kmalloc_request(int , int, int, struct dasd_device *);
struct dasd_ccw_req *
-dasd_smalloc_request(char *, int, int, struct dasd_device *);
+dasd_smalloc_request(int , int, int, struct dasd_device *);
void dasd_kfree_request(struct dasd_ccw_req *, struct dasd_device *);
void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_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 *);
+void dasd_restore_device(struct dasd_device *);
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_pm_freeze(struct ccw_device *);
+int dasd_generic_restore_device(struct ccw_device *);
+
+int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int);
+char *dasd_get_sense(struct irb *);
/* externals in dasd_devmap.c */
extern int dasd_max_devindex;
extern int dasd_probeonly;
extern int dasd_autodetect;
extern int dasd_nopav;
+extern int dasd_nofcx;
int dasd_devmap_init(void);
void dasd_devmap_exit(void);
struct dasd_device *dasd_device_from_devindex(int);
int dasd_parse(void);
-int dasd_busid_known(char *);
+int dasd_busid_known(const 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);
-long dasd_compat_ioctl(struct file *, unsigned int, unsigned long);
+int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long);
/* externals in dasd_proc.c */
int dasd_proc_init(void);
struct dasd_device *);
void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *);
void dasd_log_sense(struct dasd_ccw_req *, struct irb *);
-void dasd_log_ccw(struct dasd_ccw_req *, int, __u32);
-
-/* externals in dasd_3370_erp.c */
-dasd_era_t dasd_3370_erp_examine(struct dasd_ccw_req *, struct irb *);
+void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *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 *);
+void dasd_3990_erp_handle_sim(struct dasd_device *, char *);
/* externals in dasd_eer.c */
#ifdef CONFIG_DASD_EER
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