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 /* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
  *          Horst Hummel <Horst.Hummel@de.ibm.com>
  *          Martin Schwidefsky <schwidefsky@de.ibm.com>
  * Bugreports.to..: <Linux390@de.ibm.com>
  * Copyright IBM Corp. 1999, 2009
  */
 
 #ifndef DASD_INT_H
 #define DASD_INT_H
 
 /* we keep old device allocation scheme; IOW, minors are still in 0..255 */
 #define DASD_PER_MAJOR (1U << (MINORBITS - DASD_PARTN_BITS))
 #define DASD_PARTN_MASK ((1 << DASD_PARTN_BITS) - 1)
 
 /*
  * States a dasd device can have:
  *   new: the dasd_device structure is allocated.
  *   known: the discipline for the device is identified.
  *   basic: the device can do basic i/o.
  *   unfmt: the device could not be analyzed (format is unknown).
  *   ready: partition detection is done and the device is can do block io.
  *   online: the device accepts requests from the block device queue.
  *
  * Things to do for startup state transitions:
  *   new -> known: find discipline for the device and create devfs entries.
  *   known -> basic: request irq line for the device.
  *   basic -> ready: do the initial analysis, e.g. format detection,
  *                   do block device setup and detect partitions.
  *   ready -> online: schedule the device tasklet.
  * Things to do for shutdown state transitions:
  *   online -> ready: just set the new device state.
  *   ready -> basic: flush requests from the block device layer, clear
  *                   partition information and reset format information.
  *   basic -> known: terminate all requests and free irq.
  *   known -> new: remove devfs entries and forget discipline.
  */
 
 #define DASD_STATE_NEW    0
 #define DASD_STATE_KNOWN  1
 #define DASD_STATE_BASIC  2
 #define DASD_STATE_UNFMT  3
 #define DASD_STATE_READY  4
 #define DASD_STATE_ONLINE 5
 
 #include <linux/module.h>
 #include <linux/wait.h>
 #include <linux/blkdev.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>
 #include <linux/bitops.h>
 #include <linux/blk-mq.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;
 struct dasd_block;
 
 /* BIT DEFINITIONS FOR SENSE DATA */
 #define DASD_SENSE_BIT_0 0x80
 #define DASD_SENSE_BIT_1 0x40
 #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
 
 /* lock class for nested cdev lock */
 #define CDEV_NESTED_FIRST 1
 #define CDEV_NESTED_SECOND 2
 
 /*
  * SECTION: MACROs for klogd and s390 debug feature (dbf)
  */
 #define DBF_DEV_EVENT(d_level, d_device, d_str, d_data...) \
 do { \
     debug_sprintf_event(d_device->debug_area, \
                 d_level, \
                 d_str "\n", \
                 d_data); \
 } while(0)
 
 #define DBF_EVENT(d_level, d_str, d_data...)\
 do { \
     debug_sprintf_event(dasd_debug_area, \
                 d_level,\
                 d_str "\n", \
                 d_data); \
 } while(0)
 
 #define DBF_EVENT_DEVID(d_level, d_cdev, d_str, d_data...)  \
 do { \
     struct ccw_dev_id __dev_id;         \
     ccw_device_get_id(d_cdev, &__dev_id);       \
     debug_sprintf_event(dasd_debug_area,        \
                 d_level,                    \
                 "0.%x.%04x " d_str "\n",            \
                 __dev_id.ssid, __dev_id.devno, 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 DBF_CRIT    2   /* critical conditions          */
 #define DBF_ERR     3   /* error conditions         */
 #define DBF_WARNING 4   /* warning conditions           */
 #define DBF_NOTICE  5   /* normal but significant condition */
 #define DBF_INFO    6   /* informational            */
 #define DBF_DEBUG   6   /* debug-level messages         */
 
 /* messages to be written via klogd and dbf */
 #define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\
 do { \
     printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
            dev_name(&d_device->cdev->dev), d_args); \
     DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \
 } while(0)
 
 #define MESSAGE(d_loglevel,d_string,d_args...)\
 do { \
     printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \
     DBF_EVENT(DBF_ALERT, d_string, d_args); \
 } while(0)
 
 /* messages to be written via klogd only */
 #define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\
 do { \
     printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
            dev_name(&d_device->cdev->dev), d_args); \
 } while(0)
 
 #define MESSAGE_LOG(d_loglevel,d_string,d_args...)\
 do { \
     printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \
 } while(0)
 
 /* Macro to calculate number of blocks per page */
 #define BLOCKS_PER_PAGE(blksize) (PAGE_SIZE / blksize)
 
 struct dasd_ccw_req {
     unsigned int magic;     /* Eye catcher */
     int intrc;          /* internal error, e.g. from start_IO */
     struct list_head devlist;   /* for dasd_device request queue */
     struct list_head blocklist; /* for dasd_block request queue */
     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 dasd_device *basedev;    /* base device if no block->base */
     void *cpaddr;           /* address of ccw or tcw */
     short retries;          /* A retry counter */
     unsigned char cpmode;       /* 0 = cmd mode, 1 = itcw */
     char status;            /* status of this request */
     char lpm;           /* logical path mask */
     unsigned long flags;            /* flags of this request */
     struct dasd_queue *dq;
     unsigned long starttime;    /* jiffies time of request start */
     unsigned long expires;      /* expiration period in jiffies */
     void *data;         /* pointer to data area */
     struct irb irb;         /* device status in case of an error */
     struct dasd_ccw_req *refers;    /* ERP-chain queueing. */
     void *function;         /* originating ERP action */
     void *mem_chunk;
 
     unsigned long buildclk;     /* TOD-clock of request generation */
     unsigned long startclk;     /* TOD-clock of request start */
     unsigned long stopclk;      /* TOD-clock of request interrupt */
     unsigned long endclk;       /* TOD-clock of request termination */
 
     void (*callback)(struct dasd_ccw_req *, void *data);
     void *callback_data;
     unsigned int proc_bytes;    /* bytes for partial completion */
     unsigned int trkcount;      /* count formatted tracks */
 };
 
 /*
  * dasd_ccw_req -> status can be:
  */
 #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 */
 
 /* default expiration time*/
 #define DASD_EXPIRES      300
 #define DASD_EXPIRES_MAX  40000000
 #define DASD_RETRIES      256
 #define DASD_RETRIES_MAX  32768
 
 /* per dasd_ccw_req flags */
 #define DASD_CQR_FLAGS_USE_ERP   0  /* use ERP for this request */
 #define DASD_CQR_FLAGS_FAILFAST  1  /* FAILFAST */
 #define DASD_CQR_VERIFY_PATH     2  /* path verification request */
 #define DASD_CQR_ALLOW_SLOCK     3  /* Try this request even when lock was
                      * stolen. Should not be combined with
                      * DASD_CQR_FLAGS_USE_ERP
                      */
 /*
  * The following flags are used to suppress output of certain errors.
  */
 #define DASD_CQR_SUPPRESS_NRF   4   /* Suppress 'No Record Found' error */
 #define DASD_CQR_SUPPRESS_FP    5   /* Suppress 'File Protected' error*/
 #define DASD_CQR_SUPPRESS_IL    6   /* Suppress 'Incorrect Length' error */
 #define DASD_CQR_SUPPRESS_CR    7   /* Suppress 'Command Reject' error */
 
 #define DASD_REQ_PER_DEV 4
 
 /* Signature for error recovery functions. */
 typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *);
 
 /*
  * A single CQR can only contain a maximum of 255 CCWs. It is limited by
  * the locate record and locate record extended count value which can only hold
  * 1 Byte max.
  */
 #define DASD_CQR_MAX_CCW 255
 
 /*
  * 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 type;
     char vendor[4];
     char serial[15];
     __u16 ssid;
     __u8 real_unit_addr;
     __u8 base_unit_addr;
     char vduit[33];
 };
 
 /*
  * the struct dasd_discipline is
  * sth like a table of virtual functions, if you think of dasd_eckd
  * inheriting dasd...
  * no, currently we are not planning to reimplement the driver in C++
  */
 struct dasd_discipline {
     struct module *owner;
     char ebcname[8];    /* a name used for tagging and printks */
     char name[8];       /* a name used for tagging and printks */
 
     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. 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 *);
 
     /*
      * This function is called, when new paths become available.
      * Disciplins may use this callback to do necessary setup work,
      * e.g. verify that new path is compatible with the current
      * configuration.
      */
     int (*pe_handler)(struct dasd_device *, __u8, __u8);
 
     /*
      * Last things to do when a device is set online, and first things
      * when it is set offline.
      */
     int (*basic_to_ready) (struct dasd_device *);
     int (*online_to_ready) (struct dasd_device *);
     int (*basic_to_known)(struct dasd_device *);
 
     /*
      * Initialize block layer request queue.
      */
     void (*setup_blk_queue)(struct dasd_block *);
     /* (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
      * formats the device and check_device_format compares the format of
      * a device with the expected format_data.
      * 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 *);
     int (*format_device) (struct dasd_device *,
                   struct format_data_t *, int);
     int (*check_device_format)(struct dasd_device *,
                    struct format_check_t *, int);
     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()
      * 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_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 (*check_for_device_change) (struct dasd_device *,
                      struct dasd_ccw_req *,
                      struct irb *);
 
         /* i/o control functions. */
     int (*fill_geometry) (struct dasd_block *, struct hd_geometry *);
     int (*fill_info) (struct dasd_device *, struct dasd_information2_t *);
     int (*ioctl) (struct dasd_block *, unsigned int, void __user *);
 
     /* reload device after state change */
     int (*reload) (struct dasd_device *);
 
     int (*get_uid) (struct dasd_device *, struct dasd_uid *);
     void (*kick_validate) (struct dasd_device *);
     int (*check_attention)(struct dasd_device *, __u8);
     int (*host_access_count)(struct dasd_device *);
     int (*hosts_print)(struct dasd_device *, struct seq_file *);
     void (*handle_hpf_error)(struct dasd_device *, struct irb *);
     void (*disable_hpf)(struct dasd_device *);
     int (*hpf_enabled)(struct dasd_device *);
     void (*reset_path)(struct dasd_device *, __u8);
 
     /*
      * Extent Space Efficient (ESE) relevant functions
      */
     int (*is_ese)(struct dasd_device *);
     /* Capacity */
     int (*space_allocated)(struct dasd_device *);
     int (*space_configured)(struct dasd_device *);
     int (*logical_capacity)(struct dasd_device *);
     int (*release_space)(struct dasd_device *, struct format_data_t *);
     /* Extent Pool */
     int (*ext_pool_id)(struct dasd_device *);
     int (*ext_size)(struct dasd_device *);
     int (*ext_pool_cap_at_warnlevel)(struct dasd_device *);
     int (*ext_pool_warn_thrshld)(struct dasd_device *);
     int (*ext_pool_oos)(struct dasd_device *);
     int (*ext_pool_exhaust)(struct dasd_device *, struct dasd_ccw_req *);
     struct dasd_ccw_req *(*ese_format)(struct dasd_device *,
                        struct dasd_ccw_req *, struct irb *);
     int (*ese_read)(struct dasd_ccw_req *, struct irb *);
 };
 
 extern struct dasd_discipline *dasd_diag_discipline_pointer;
 
 /*
  * Notification numbers for extended error reporting notifications:
  * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's
  * eer pointer) is freed. The error reporting module needs to do all necessary
  * cleanup steps.
  * The DASD_EER_TRIGGER notification sends the actual error reports (triggers).
  */
 #define DASD_EER_DISABLE 0
 #define DASD_EER_TRIGGER 1
 
 /* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */
 #define DASD_EER_FATALERROR  1
 #define DASD_EER_NOPATH      2
 #define DASD_EER_STATECHANGE 3
 #define DASD_EER_PPRCSUSPEND 4
 #define DASD_EER_NOSPC       5
 
 /* DASD path handling */
 
 #define DASD_PATH_OPERATIONAL  1
 #define DASD_PATH_TBV          2
 #define DASD_PATH_PP           3
 #define DASD_PATH_NPP          4
 #define DASD_PATH_MISCABLED    5
 #define DASD_PATH_NOHPF        6
 #define DASD_PATH_CUIR         7
 #define DASD_PATH_IFCC         8
 #define DASD_PATH_FCSEC        9
 
 #define DASD_THRHLD_MAX     4294967295U
 #define DASD_INTERVAL_MAX   4294967295U
 
 /* FC Endpoint Security Capabilities */
 #define DASD_FC_SECURITY_UNSUP      0
 #define DASD_FC_SECURITY_AUTH       1
 #define DASD_FC_SECURITY_ENC_FCSP2  2
 #define DASD_FC_SECURITY_ENC_ERAS   3
 
 #define DASD_FC_SECURITY_ENC_STR    "Encryption"
 static const struct {
     u8 value;
     char *name;
 } dasd_path_fcs_mnemonics[] = {
     { DASD_FC_SECURITY_UNSUP,   "Unsupported" },
     { DASD_FC_SECURITY_AUTH,    "Authentication" },
     { DASD_FC_SECURITY_ENC_FCSP2,   DASD_FC_SECURITY_ENC_STR },
     { DASD_FC_SECURITY_ENC_ERAS,    DASD_FC_SECURITY_ENC_STR },
 };
 
 static inline char *dasd_path_get_fcs_str(int val)
 {
     int i;
 
     for (i = 0; i < ARRAY_SIZE(dasd_path_fcs_mnemonics); i++) {
         if (dasd_path_fcs_mnemonics[i].value == val)
             return dasd_path_fcs_mnemonics[i].name;
     }
 
     return dasd_path_fcs_mnemonics[0].name;
 }
 
 struct dasd_path {
     unsigned long flags;
     u8 cssid;
     u8 ssid;
     u8 chpid;
     struct dasd_conf_data *conf_data;
     atomic_t error_count;
     unsigned long errorclk;
     u8 fc_security;
     struct kobject kobj;
     bool in_sysfs;
 };
 
 #define to_dasd_path(path) container_of(path, struct dasd_path, kobj)
 
 static inline void dasd_path_release(struct kobject *kobj)
 {
 /* Memory for the dasd_path kobject is freed when dasd_free_device() is called */
 }
 
 
 struct dasd_profile_info {
     /* legacy part of profile data, as in dasd_profile_info_t */
     unsigned int dasd_io_reqs;   /* number of requests processed */
     unsigned int dasd_io_sects;  /* number of sectors processed */
     unsigned int dasd_io_secs[32];   /* histogram of request's sizes */
     unsigned int dasd_io_times[32];  /* histogram of requests's times */
     unsigned int dasd_io_timps[32];  /* h. of requests's times per sector */
     unsigned int dasd_io_time1[32];  /* hist. of time from build to start */
     unsigned int dasd_io_time2[32];  /* hist. of time from start to irq */
     unsigned int dasd_io_time2ps[32]; /* hist. of time from start to irq */
     unsigned int dasd_io_time3[32];  /* hist. of time from irq to end */
     unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */
 
     /* new data */
     struct timespec64 starttod;    /* time of start or last reset */
     unsigned int dasd_io_alias;    /* requests using an alias */
     unsigned int dasd_io_tpm;      /* requests using transport mode */
     unsigned int dasd_read_reqs;       /* total number of read  requests */
     unsigned int dasd_read_sects;      /* total number read sectors */
     unsigned int dasd_read_alias;      /* read request using an alias */
     unsigned int dasd_read_tpm;    /* read requests in transport mode */
     unsigned int dasd_read_secs[32];   /* histogram of request's sizes */
     unsigned int dasd_read_times[32];  /* histogram of requests's times */
     unsigned int dasd_read_time1[32];  /* hist. time from build to start */
     unsigned int dasd_read_time2[32];  /* hist. of time from start to irq */
     unsigned int dasd_read_time3[32];  /* hist. of time from irq to end */
     unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */
     unsigned long dasd_sum_times;      /* sum of request times */
     unsigned long dasd_sum_time_str;   /* sum of time from build to start */
     unsigned long dasd_sum_time_irq;   /* sum of time from start to irq */
     unsigned long dasd_sum_time_end;   /* sum of time from irq to end */
 };
 
 struct dasd_profile {
     struct dentry *dentry;
     struct dasd_profile_info *data;
     spinlock_t lock;
 };
 
 struct dasd_format_entry {
     struct list_head list;
     sector_t track;
 };
 
 struct dasd_device {
     /* Block device stuff. */
     struct dasd_block *block;
 
         unsigned int devindex;
     unsigned long flags;       /* per device flags */
     unsigned short features;   /* copy of devmap-features (read-only!) */
 
     /* extended error reporting stuff (eer) */
     struct dasd_ccw_req *eer_cqr;
 
     /* Device discipline stuff. */
     struct dasd_discipline *discipline;
     struct dasd_discipline *base_discipline;
     void *private;
     struct dasd_path path[8];
     __u8 opm;
 
     /* Device state and target state. */
     int state, target;
     struct mutex state_mutex;
     int stopped;        /* device (ccw_device_start) was stopped */
 
     /* reference count. */
         atomic_t ref_count;
 
     /* ccw queue and memory for static ccw/erp buffers. */
     struct list_head ccw_queue;
     spinlock_t mem_lock;
     void *ccw_mem;
     void *erp_mem;
     void *ese_mem;
     struct list_head ccw_chunks;
     struct list_head erp_chunks;
     struct list_head ese_chunks;
 
     atomic_t tasklet_scheduled;
         struct tasklet_struct tasklet;
     struct work_struct kick_work;
     struct work_struct reload_device;
     struct work_struct kick_validate;
     struct work_struct suc_work;
     struct work_struct requeue_requests;
     struct timer_list timer;
 
     debug_info_t *debug_area;
 
     struct ccw_device *cdev;
 
     /* hook for alias management */
     struct list_head alias_list;
 
     /* default expiration time in s */
     unsigned long default_expires;
     unsigned long default_retries;
 
     unsigned long blk_timeout;
 
     unsigned long path_thrhld;
     unsigned long path_interval;
 
     struct dentry *debugfs_dentry;
     struct dentry *hosts_dentry;
     struct dasd_profile profile;
     struct dasd_format_entry format_entry;
     struct kset *paths_info;
 };
 
 struct dasd_block {
     /* Block device stuff. */
     struct gendisk *gdp;
     struct request_queue *request_queue;
     spinlock_t request_queue_lock;
     struct blk_mq_tag_set tag_set;
     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;
 
     struct dentry *debugfs_dentry;
     struct dasd_profile profile;
 
     struct list_head format_list;
     spinlock_t format_lock;
     atomic_t trkcount;
 };
 
 struct dasd_attention_data {
     struct dasd_device *device;
     __u8 lpum;
 };
 
 struct dasd_queue {
     spinlock_t lock;
 };
 
 /* 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_SU      16        /* summary unit check handling */
 #define DASD_STOPPED_NOSPC   128       /* no space left */
 
 /* per device flags */
 #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 */
 #define DASD_FLAG_DEVICE_RO 6   /* The device itself is read-only. Don't
                      * confuse this with the user specified
                      * read-only feature.
                      */
 #define DASD_FLAG_IS_RESERVED   7   /* The device is reserved */
 #define DASD_FLAG_LOCK_STOLEN   8   /* The device lock was stolen */
 #define DASD_FLAG_SUSPENDED 9   /* The device was suspended */
 #define DASD_FLAG_SAFE_OFFLINE  10  /* safe offline processing requested*/
 #define DASD_FLAG_SAFE_OFFLINE_RUNNING  11  /* safe offline running */
 #define DASD_FLAG_ABORTALL  12  /* Abort all noretry requests */
 #define DASD_FLAG_PATH_VERIFY   13  /* Path verification worker running */
 #define DASD_FLAG_SUC       14  /* unhandled summary unit check */
 
 #define DASD_SLEEPON_START_TAG  ((void *) 1)
 #define DASD_SLEEPON_END_TAG    ((void *) 2)
 
 void dasd_put_device_wake(struct dasd_device *);
 
 /*
  * Reference count inliners
  */
 static inline void
 dasd_get_device(struct dasd_device *device)
 {
     atomic_inc(&device->ref_count);
 }
 
 static inline void
 dasd_put_device(struct dasd_device *device)
 {
     if (atomic_dec_return(&device->ref_count) == 0)
         dasd_put_device_wake(device);
 }
 
 /*
  * The static memory in ccw_mem and erp_mem is managed by a sorted
  * list of free memory chunks.
  */
 struct dasd_mchunk
 {
     struct list_head list;
     unsigned long size;
 } __attribute__ ((aligned(8)));
 
 static inline void
 dasd_init_chunklist(struct list_head *chunk_list, void *mem,
             unsigned long size)
 {
     struct dasd_mchunk *chunk;
 
     INIT_LIST_HEAD(chunk_list);
     chunk = (struct dasd_mchunk *) mem;
     chunk->size = size - sizeof(struct dasd_mchunk);
     list_add(&chunk->list, chunk_list);
 }
 
 static inline void *
 dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size)
 {
     struct dasd_mchunk *chunk, *tmp;
 
     size = (size + 7L) & -8L;
     list_for_each_entry(chunk, chunk_list, list) {
         if (chunk->size < size)
             continue;
         if (chunk->size > size + sizeof(struct dasd_mchunk)) {
             char *endaddr = (char *) (chunk + 1) + chunk->size;
             tmp = (struct dasd_mchunk *) (endaddr - size) - 1;
             tmp->size = size;
             chunk->size -= size + sizeof(struct dasd_mchunk);
             chunk = tmp;
         } else
             list_del(&chunk->list);
         return (void *) (chunk + 1);
     }
     return NULL;
 }
 
 static inline void
 dasd_free_chunk(struct list_head *chunk_list, void *mem)
 {
     struct dasd_mchunk *chunk, *tmp;
     struct list_head *p, *left;
 
     chunk = (struct dasd_mchunk *)
         ((char *) mem - sizeof(struct dasd_mchunk));
     /* Find out the left neighbour in chunk_list. */
     left = chunk_list;
     list_for_each(p, chunk_list) {
         if (list_entry(p, struct dasd_mchunk, list) > chunk)
             break;
         left = p;
     }
     /* Try to merge with right neighbour = next element from left. */
     if (left->next != chunk_list) {
         tmp = list_entry(left->next, struct dasd_mchunk, list);
         if ((char *) (chunk + 1) + chunk->size == (char *) tmp) {
             list_del(&tmp->list);
             chunk->size += tmp->size + sizeof(struct dasd_mchunk);
         }
     }
     /* Try to merge with left neighbour. */
     if (left != chunk_list) {
         tmp = list_entry(left, struct dasd_mchunk, list);
         if ((char *) (tmp + 1) + tmp->size == (char *) chunk) {
             tmp->size += chunk->size + sizeof(struct dasd_mchunk);
             return;
         }
     }
     __list_add(&chunk->list, left, left->next);
 }
 
 /*
  * Check if bsize is in { 512, 1024, 2048, 4096 }
  */
 static inline int
 dasd_check_blocksize(int bsize)
 {
     if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize))
         return -EMEDIUMTYPE;
     return 0;
 }
 
 /*
  * return the callback data of the original request in case there are
  * ERP requests build on top of it
  */
 static inline void *dasd_get_callback_data(struct dasd_ccw_req *cqr)
 {
     while (cqr->refers)
         cqr = cqr->refers;
 
     return cqr->callback_data;
 }
 
 /* externals in dasd.c */
 #define DASD_PROFILE_OFF     0
 #define DASD_PROFILE_ON      1
 #define DASD_PROFILE_GLOBAL_ONLY 2
 
 extern debug_info_t *dasd_debug_area;
 extern struct dasd_profile dasd_global_profile;
 extern unsigned int dasd_global_profile_level;
 extern const struct block_device_operations dasd_device_operations;
 
 extern struct kmem_cache *dasd_page_cache;
 
 struct dasd_ccw_req *
 dasd_smalloc_request(int, int, int, struct dasd_device *, struct dasd_ccw_req *);
 struct dasd_ccw_req *dasd_fmalloc_request(int, int, int, struct dasd_device *);
 void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *);
 void dasd_ffree_request(struct dasd_ccw_req *, struct dasd_device *);
 void dasd_wakeup_cb(struct dasd_ccw_req *, void *);
 
 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 *);
 
 enum blk_eh_timer_return dasd_times_out(struct request *req);
 
 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_reload_device(struct dasd_device *);
 void dasd_schedule_requeue(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_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_queue(struct list_head *);
 int  dasd_sleep_on_immediatly(struct dasd_ccw_req *);
 int  dasd_sleep_on_queue_interruptible(struct list_head *);
 int  dasd_sleep_on_interruptible(struct dasd_ccw_req *);
 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 *);
 void dasd_generic_free_discipline(struct dasd_device *);
 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);
 int dasd_generic_last_path_gone(struct dasd_device *);
 int dasd_generic_path_operational(struct dasd_device *);
 void dasd_generic_shutdown(struct ccw_device *);
 
 void dasd_generic_handle_state_change(struct dasd_device *);
 enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *);
 void dasd_generic_path_event(struct ccw_device *, int *);
 int dasd_generic_verify_path(struct dasd_device *, __u8);
 void dasd_generic_space_exhaust(struct dasd_device *, struct dasd_ccw_req *);
 void dasd_generic_space_avail(struct dasd_device *);
 
 int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int);
 char *dasd_get_sense(struct irb *);
 
 void dasd_device_set_stop_bits(struct dasd_device *, int);
 void dasd_device_remove_stop_bits(struct dasd_device *, int);
 
 int dasd_device_is_ro(struct dasd_device *);
 
 void dasd_profile_reset(struct dasd_profile *);
 int dasd_profile_on(struct dasd_profile *);
 void dasd_profile_off(struct dasd_profile *);
 char *dasd_get_user_string(const char __user *, size_t);
 
 /* 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_create_device(struct ccw_device *);
 void dasd_delete_device(struct dasd_device *);
 
 int dasd_get_feature(struct ccw_device *, int);
 int dasd_set_feature(struct ccw_device *, int, int);
 
 extern const struct attribute_group *dasd_dev_groups[];
 void dasd_path_create_kobj(struct dasd_device *, int);
 void dasd_path_create_kobjects(struct dasd_device *);
 void dasd_path_remove_kobjects(struct dasd_device *);
 
 struct dasd_device *dasd_device_from_cdev(struct ccw_device *);
 struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *);
 struct dasd_device *dasd_device_from_devindex(int);
 
 void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *);
 struct dasd_device *dasd_device_from_gendisk(struct gendisk *);
 
 int dasd_parse(void) __init;
 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_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 block_device *, fmode_t, unsigned int, unsigned long);
 int dasd_set_read_only(struct block_device *bdev, bool ro);
 
 /* externals in dasd_proc.c */
 int dasd_proc_init(void);
 void dasd_proc_exit(void);
 
 /* externals in dasd_erp.c */
 struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *);
 struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *);
 struct dasd_ccw_req *dasd_alloc_erp_request(unsigned int, int, int,
                         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_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb);
 
 /* externals in dasd_3990_erp.c */
 struct dasd_ccw_req *dasd_3990_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
 int dasd_eer_init(void);
 void dasd_eer_exit(void);
 int dasd_eer_enable(struct dasd_device *);
 void dasd_eer_disable(struct dasd_device *);
 void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr,
             unsigned int id);
 void dasd_eer_snss(struct dasd_device *);
 
 static inline int dasd_eer_enabled(struct dasd_device *device)
 {
     return device->eer_cqr != NULL;
 }
 #else
 #define dasd_eer_init()     (0)
 #define dasd_eer_exit()     do { } while (0)
 #define dasd_eer_enable(d)  (0)
 #define dasd_eer_disable(d) do { } while (0)
 #define dasd_eer_write(d,c,i)   do { } while (0)
 #define dasd_eer_snss(d)    do { } while (0)
 #define dasd_eer_enabled(d) (0)
 #endif  /* CONFIG_DASD_ERR */
 
 
 /* DASD path handling functions */
 
 /*
  * helper functions to modify bit masks for a given channel path for a device
  */
 static inline int dasd_path_is_operational(struct dasd_device *device, int chp)
 {
     return test_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags);
 }
 
 static inline int dasd_path_need_verify(struct dasd_device *device, int chp)
 {
     return test_bit(DASD_PATH_TBV, &device->path[chp].flags);
 }
 
 static inline void dasd_path_verify(struct dasd_device *device, int chp)
 {
     __set_bit(DASD_PATH_TBV, &device->path[chp].flags);
 }
 
 static inline void dasd_path_clear_verify(struct dasd_device *device, int chp)
 {
     __clear_bit(DASD_PATH_TBV, &device->path[chp].flags);
 }
 
 static inline void dasd_path_clear_all_verify(struct dasd_device *device)
 {
     int chp;
 
     for (chp = 0; chp < 8; chp++)
         dasd_path_clear_verify(device, chp);
 }
 
 static inline void dasd_path_fcsec(struct dasd_device *device, int chp)
 {
     __set_bit(DASD_PATH_FCSEC, &device->path[chp].flags);
 }
 
 static inline void dasd_path_clear_fcsec(struct dasd_device *device, int chp)
 {
     __clear_bit(DASD_PATH_FCSEC, &device->path[chp].flags);
 }
 
 static inline int dasd_path_need_fcsec(struct dasd_device *device, int chp)
 {
     return test_bit(DASD_PATH_FCSEC, &device->path[chp].flags);
 }
 
 static inline void dasd_path_clear_all_fcsec(struct dasd_device *device)
 {
     int chp;
 
     for (chp = 0; chp < 8; chp++)
         dasd_path_clear_fcsec(device, chp);
 }
 
 static inline void dasd_path_operational(struct dasd_device *device, int chp)
 {
     __set_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags);
     device->opm |= (0x80 >> chp);
 }
 
 static inline void dasd_path_nonpreferred(struct dasd_device *device, int chp)
 {
     __set_bit(DASD_PATH_NPP, &device->path[chp].flags);
 }
 
 static inline int dasd_path_is_nonpreferred(struct dasd_device *device, int chp)
 {
     return test_bit(DASD_PATH_NPP, &device->path[chp].flags);
 }
 
 static inline void dasd_path_clear_nonpreferred(struct dasd_device *device,
                         int chp)
 {
     __clear_bit(DASD_PATH_NPP, &device->path[chp].flags);
 }
 
 static inline void dasd_path_preferred(struct dasd_device *device, int chp)
 {
     __set_bit(DASD_PATH_PP, &device->path[chp].flags);
 }
 
 static inline int dasd_path_is_preferred(struct dasd_device *device, int chp)
 {
     return test_bit(DASD_PATH_PP, &device->path[chp].flags);
 }
 
 static inline void dasd_path_clear_preferred(struct dasd_device *device,
                          int chp)
 {
     __clear_bit(DASD_PATH_PP, &device->path[chp].flags);
 }
 
 static inline void dasd_path_clear_oper(struct dasd_device *device, int chp)
 {
     __clear_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags);
     device->opm &= ~(0x80 >> chp);
 }
 
 static inline void dasd_path_clear_cable(struct dasd_device *device, int chp)
 {
     __clear_bit(DASD_PATH_MISCABLED, &device->path[chp].flags);
 }
 
 static inline void dasd_path_cuir(struct dasd_device *device, int chp)
 {
     __set_bit(DASD_PATH_CUIR, &device->path[chp].flags);
 }
 
 static inline int dasd_path_is_cuir(struct dasd_device *device, int chp)
 {
     return test_bit(DASD_PATH_CUIR, &device->path[chp].flags);
 }
 
 static inline void dasd_path_clear_cuir(struct dasd_device *device, int chp)
 {
     __clear_bit(DASD_PATH_CUIR, &device->path[chp].flags);
 }
 
 static inline void dasd_path_ifcc(struct dasd_device *device, int chp)
 {
     set_bit(DASD_PATH_IFCC, &device->path[chp].flags);
 }
 
 static inline int dasd_path_is_ifcc(struct dasd_device *device, int chp)
 {
     return test_bit(DASD_PATH_IFCC, &device->path[chp].flags);
 }
 
 static inline void dasd_path_clear_ifcc(struct dasd_device *device, int chp)
 {
     clear_bit(DASD_PATH_IFCC, &device->path[chp].flags);
 }
 
 static inline void dasd_path_clear_nohpf(struct dasd_device *device, int chp)
 {
     __clear_bit(DASD_PATH_NOHPF, &device->path[chp].flags);
 }
 
 static inline void dasd_path_miscabled(struct dasd_device *device, int chp)
 {
     __set_bit(DASD_PATH_MISCABLED, &device->path[chp].flags);
 }
 
 static inline int dasd_path_is_miscabled(struct dasd_device *device, int chp)
 {
     return test_bit(DASD_PATH_MISCABLED, &device->path[chp].flags);
 }
 
 static inline void dasd_path_nohpf(struct dasd_device *device, int chp)
 {
     __set_bit(DASD_PATH_NOHPF, &device->path[chp].flags);
 }
 
 static inline int dasd_path_is_nohpf(struct dasd_device *device, int chp)
 {
     return test_bit(DASD_PATH_NOHPF, &device->path[chp].flags);
 }
 
 /*
  * get functions for path masks
  * will return a path masks for the given device
  */
 
 static inline __u8 dasd_path_get_opm(struct dasd_device *device)
 {
     return device->opm;
 }
 
 static inline __u8 dasd_path_get_tbvpm(struct dasd_device *device)
 {
     int chp;
     __u8 tbvpm = 0x00;
 
     for (chp = 0; chp < 8; chp++)
         if (dasd_path_need_verify(device, chp))
             tbvpm |= 0x80 >> chp;
     return tbvpm;
 }
 
 static inline int dasd_path_get_fcsecpm(struct dasd_device *device)
 {
     int chp;
 
     for (chp = 0; chp < 8; chp++)
         if (dasd_path_need_fcsec(device, chp))
             return 1;
 
     return 0;
 }
 
 static inline __u8 dasd_path_get_nppm(struct dasd_device *device)
 {
     int chp;
     __u8 npm = 0x00;
 
     for (chp = 0; chp < 8; chp++) {
         if (dasd_path_is_nonpreferred(device, chp))
             npm |= 0x80 >> chp;
     }
     return npm;
 }
 
 static inline __u8 dasd_path_get_ppm(struct dasd_device *device)
 {
     int chp;
     __u8 ppm = 0x00;
 
     for (chp = 0; chp < 8; chp++)
         if (dasd_path_is_preferred(device, chp))
             ppm |= 0x80 >> chp;
     return ppm;
 }
 
 static inline __u8 dasd_path_get_cablepm(struct dasd_device *device)
 {
     int chp;
     __u8 cablepm = 0x00;
 
     for (chp = 0; chp < 8; chp++)
         if (dasd_path_is_miscabled(device, chp))
             cablepm |= 0x80 >> chp;
     return cablepm;
 }
 
 static inline __u8 dasd_path_get_cuirpm(struct dasd_device *device)
 {
     int chp;
     __u8 cuirpm = 0x00;
 
     for (chp = 0; chp < 8; chp++)
         if (dasd_path_is_cuir(device, chp))
             cuirpm |= 0x80 >> chp;
     return cuirpm;
 }
 
 static inline __u8 dasd_path_get_ifccpm(struct dasd_device *device)
 {
     int chp;
     __u8 ifccpm = 0x00;
 
     for (chp = 0; chp < 8; chp++)
         if (dasd_path_is_ifcc(device, chp))
             ifccpm |= 0x80 >> chp;
     return ifccpm;
 }
 
 static inline __u8 dasd_path_get_hpfpm(struct dasd_device *device)
 {
     int chp;
     __u8 hpfpm = 0x00;
 
     for (chp = 0; chp < 8; chp++)
         if (dasd_path_is_nohpf(device, chp))
             hpfpm |= 0x80 >> chp;
     return hpfpm;
 }
 
 static inline u8 dasd_path_get_fcs_path(struct dasd_device *device, int chp)
 {
     return device->path[chp].fc_security;
 }
 
 static inline int dasd_path_get_fcs_device(struct dasd_device *device)
 {
     u8 fc_sec = 0;
     int chp;
 
     for (chp = 0; chp < 8; chp++) {
         if (device->opm & (0x80 >> chp)) {
             fc_sec = device->path[chp].fc_security;
             break;
         }
     }
     for (; chp < 8; chp++) {
         if (device->opm & (0x80 >> chp))
             if (device->path[chp].fc_security != fc_sec)
                 return -EINVAL;
     }
 
     return fc_sec;
 }
 
 /*
  * add functions for path masks
  * the existing path mask will be extended by the given path mask
  */
 static inline void dasd_path_add_tbvpm(struct dasd_device *device, __u8 pm)
 {
     int chp;
 
     for (chp = 0; chp < 8; chp++)
         if (pm & (0x80 >> chp))
             dasd_path_verify(device, chp);
 }
 
 static inline __u8 dasd_path_get_notoperpm(struct dasd_device *device)
 {
     int chp;
     __u8 nopm = 0x00;
 
     for (chp = 0; chp < 8; chp++)
         if (dasd_path_is_nohpf(device, chp) ||
             dasd_path_is_ifcc(device, chp) ||
             dasd_path_is_cuir(device, chp) ||
             dasd_path_is_miscabled(device, chp))
             nopm |= 0x80 >> chp;
     return nopm;
 }
 
 static inline void dasd_path_add_opm(struct dasd_device *device, __u8 pm)
 {
     int chp;
 
     for (chp = 0; chp < 8; chp++)
         if (pm & (0x80 >> chp)) {
             dasd_path_operational(device, chp);
             /*
              * if the path is used
              * it should not be in one of the negative lists
              */
             dasd_path_clear_nohpf(device, chp);
             dasd_path_clear_cuir(device, chp);
             dasd_path_clear_cable(device, chp);
             dasd_path_clear_ifcc(device, chp);
         }
 }
 
 static inline void dasd_path_add_cablepm(struct dasd_device *device, __u8 pm)
 {
     int chp;
 
     for (chp = 0; chp < 8; chp++)
         if (pm & (0x80 >> chp))
             dasd_path_miscabled(device, chp);
 }
 
 static inline void dasd_path_add_cuirpm(struct dasd_device *device, __u8 pm)
 {
     int chp;
 
     for (chp = 0; chp < 8; chp++)
         if (pm & (0x80 >> chp))
             dasd_path_cuir(device, chp);
 }
 
 static inline void dasd_path_add_ifccpm(struct dasd_device *device, __u8 pm)
 {
     int chp;
 
     for (chp = 0; chp < 8; chp++)
         if (pm & (0x80 >> chp))
             dasd_path_ifcc(device, chp);
 }
 
 static inline void dasd_path_add_nppm(struct dasd_device *device, __u8 pm)
 {
     int chp;
 
     for (chp = 0; chp < 8; chp++)
         if (pm & (0x80 >> chp))
             dasd_path_nonpreferred(device, chp);
 }
 
 static inline void dasd_path_add_nohpfpm(struct dasd_device *device, __u8 pm)
 {
     int chp;
 
     for (chp = 0; chp < 8; chp++)
         if (pm & (0x80 >> chp))
             dasd_path_nohpf(device, chp);
 }
 
 static inline void dasd_path_add_ppm(struct dasd_device *device, __u8 pm)
 {
     int chp;
 
     for (chp = 0; chp < 8; chp++)
         if (pm & (0x80 >> chp))
             dasd_path_preferred(device, chp);
 }
 
 static inline void dasd_path_add_fcsecpm(struct dasd_device *device, __u8 pm)
 {
     int chp;
 
     for (chp = 0; chp < 8; chp++)
         if (pm & (0x80 >> chp))
             dasd_path_fcsec(device, chp);
 }
 
 /*
  * set functions for path masks
  * the existing path mask will be replaced by the given path mask
  */
 static inline void dasd_path_set_tbvpm(struct dasd_device *device, __u8 pm)
 {
     int chp;
 
     for (chp = 0; chp < 8; chp++)
         if (pm & (0x80 >> chp))
             dasd_path_verify(device, chp);
         else
             dasd_path_clear_verify(device, chp);
 }
 
 static inline void dasd_path_set_opm(struct dasd_device *device, __u8 pm)
 {
     int chp;
 
     for (chp = 0; chp < 8; chp++) {
         dasd_path_clear_oper(device, chp);
         if (pm & (0x80 >> chp)) {
             dasd_path_operational(device, chp);
             /*
              * if the path is used
              * it should not be in one of the negative lists
              */
             dasd_path_clear_nohpf(device, chp);
             dasd_path_clear_cuir(device, chp);
             dasd_path_clear_cable(device, chp);
             dasd_path_clear_ifcc(device, chp);
         }
     }
 }
 
 /*
  * remove functions for path masks
  * the existing path mask will be cleared with the given path mask
  */
 static inline void dasd_path_remove_opm(struct dasd_device *device, __u8 pm)
 {
     int chp;
 
     for (chp = 0; chp < 8; chp++) {
         if (pm & (0x80 >> chp))
             dasd_path_clear_oper(device, chp);
     }
 }
 
 /*
  * add the newly available path to the to be verified pm and remove it from
  * normal operation until it is verified
  */
 static inline void dasd_path_available(struct dasd_device *device, int chp)
 {
     dasd_path_clear_oper(device, chp);
     dasd_path_verify(device, chp);
 }
 
 static inline void dasd_path_notoper(struct dasd_device *device, int chp)
 {
     dasd_path_clear_oper(device, chp);
     dasd_path_clear_preferred(device, chp);
     dasd_path_clear_nonpreferred(device, chp);
 }
 
 static inline void dasd_path_fcsec_update(struct dasd_device *device, int chp)
 {
     dasd_path_fcsec(device, chp);
 }
 
 /*
  * remove all paths from normal operation
  */
 static inline void dasd_path_no_path(struct dasd_device *device)
 {
     int chp;
 
     for (chp = 0; chp < 8; chp++)
         dasd_path_notoper(device, chp);
 
     dasd_path_clear_all_verify(device);
 }
 
 /* end - path handling */
 
 #endif              /* DASD_H */

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