1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
4 * Horst Hummel <Horst.Hummel@de.ibm.com>
5 * Martin Schwidefsky <schwidefsky@de.ibm.com>
6 * Bugreports.to..: <Linux390@de.ibm.com>
7 * Copyright IBM Corp. 1999, 2009
13 /* we keep old device allocation scheme; IOW, minors are still in 0..255 */
14 #define DASD_PER_MAJOR (1U << (MINORBITS - DASD_PARTN_BITS))
15 #define DASD_PARTN_MASK ((1 << DASD_PARTN_BITS) - 1)
18 * States a dasd device can have:
19 * new: the dasd_device structure is allocated.
20 * known: the discipline for the device is identified.
21 * basic: the device can do basic i/o.
22 * unfmt: the device could not be analyzed (format is unknown).
23 * ready: partition detection is done and the device is can do block io.
24 * online: the device accepts requests from the block device queue.
26 * Things to do for startup state transitions:
27 * new -> known: find discipline for the device and create devfs entries.
28 * known -> basic: request irq line for the device.
29 * basic -> ready: do the initial analysis, e.g. format detection,
30 * do block device setup and detect partitions.
31 * ready -> online: schedule the device tasklet.
32 * Things to do for shutdown state transitions:
33 * online -> ready: just set the new device state.
34 * ready -> basic: flush requests from the block device layer, clear
35 * partition information and reset format information.
36 * basic -> known: terminate all requests and free irq.
37 * known -> new: remove devfs entries and forget discipline.
40 #define DASD_STATE_NEW 0
41 #define DASD_STATE_KNOWN 1
42 #define DASD_STATE_BASIC 2
43 #define DASD_STATE_UNFMT 3
44 #define DASD_STATE_READY 4
45 #define DASD_STATE_ONLINE 5
47 #include <linux/module.h>
48 #include <linux/wait.h>
49 #include <linux/blkdev.h>
50 #include <linux/hdreg.h>
51 #include <linux/interrupt.h>
52 #include <linux/log2.h>
53 #include <asm/ccwdev.h>
54 #include <linux/workqueue.h>
55 #include <asm/debug.h>
57 #include <asm/idals.h>
58 #include <linux/bitops.h>
59 #include <linux/blk-mq.h>
61 /* DASD discipline magic */
62 #define DASD_ECKD_MAGIC 0xC5C3D2C4
63 #define DASD_DIAG_MAGIC 0xC4C9C1C7
64 #define DASD_FBA_MAGIC 0xC6C2C140
67 * SECTION: Type definitions
72 /* BIT DEFINITIONS FOR SENSE DATA */
73 #define DASD_SENSE_BIT_0 0x80
74 #define DASD_SENSE_BIT_1 0x40
75 #define DASD_SENSE_BIT_2 0x20
76 #define DASD_SENSE_BIT_3 0x10
78 /* BIT DEFINITIONS FOR SIM SENSE */
79 #define DASD_SIM_SENSE 0x0F
80 #define DASD_SIM_MSG_TO_OP 0x03
81 #define DASD_SIM_LOG 0x0C
83 /* lock class for nested cdev lock */
84 #define CDEV_NESTED_FIRST 1
85 #define CDEV_NESTED_SECOND 2
88 * SECTION: MACROs for klogd and s390 debug feature (dbf)
90 #define DBF_DEV_EVENT(d_level, d_device, d_str, d_data...) \
92 debug_sprintf_event(d_device->debug_area, \
98 #define DBF_EVENT(d_level, d_str, d_data...)\
100 debug_sprintf_event(dasd_debug_area, \
106 #define DBF_EVENT_DEVID(d_level, d_cdev, d_str, d_data...) \
108 struct ccw_dev_id __dev_id; \
109 ccw_device_get_id(d_cdev, &__dev_id); \
110 debug_sprintf_event(dasd_debug_area, \
112 "0.%x.%04x " d_str "\n", \
113 __dev_id.ssid, __dev_id.devno, d_data); \
116 /* limit size for an errorstring */
117 #define ERRORLENGTH 30
119 /* definition of dbf debug levels */
120 #define DBF_EMERG 0 /* system is unusable */
121 #define DBF_ALERT 1 /* action must be taken immediately */
122 #define DBF_CRIT 2 /* critical conditions */
123 #define DBF_ERR 3 /* error conditions */
124 #define DBF_WARNING 4 /* warning conditions */
125 #define DBF_NOTICE 5 /* normal but significant condition */
126 #define DBF_INFO 6 /* informational */
127 #define DBF_DEBUG 6 /* debug-level messages */
129 /* messages to be written via klogd and dbf */
130 #define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\
132 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
133 dev_name(&d_device->cdev->dev), d_args); \
134 DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \
137 #define MESSAGE(d_loglevel,d_string,d_args...)\
139 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \
140 DBF_EVENT(DBF_ALERT, d_string, d_args); \
143 /* messages to be written via klogd only */
144 #define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\
146 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
147 dev_name(&d_device->cdev->dev), d_args); \
150 #define MESSAGE_LOG(d_loglevel,d_string,d_args...)\
152 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \
155 /* Macro to calculate number of blocks per page */
156 #define BLOCKS_PER_PAGE(blksize) (PAGE_SIZE / blksize)
158 struct dasd_ccw_req
{
159 unsigned int magic
; /* Eye catcher */
160 int intrc
; /* internal error, e.g. from start_IO */
161 struct list_head devlist
; /* for dasd_device request queue */
162 struct list_head blocklist
; /* for dasd_block request queue */
163 struct dasd_block
*block
; /* the originating block device */
164 struct dasd_device
*memdev
; /* the device used to allocate this */
165 struct dasd_device
*startdev
; /* device the request is started on */
166 struct dasd_device
*basedev
; /* base device if no block->base */
167 void *cpaddr
; /* address of ccw or tcw */
168 short retries
; /* A retry counter */
169 unsigned char cpmode
; /* 0 = cmd mode, 1 = itcw */
170 char status
; /* status of this request */
171 char lpm
; /* logical path mask */
172 unsigned long flags
; /* flags of this request */
173 struct dasd_queue
*dq
;
174 unsigned long starttime
; /* jiffies time of request start */
175 unsigned long expires
; /* expiration period in jiffies */
176 void *data
; /* pointer to data area */
177 struct irb irb
; /* device status in case of an error */
178 struct dasd_ccw_req
*refers
; /* ERP-chain queueing. */
179 void *function
; /* originating ERP action */
182 unsigned long buildclk
; /* TOD-clock of request generation */
183 unsigned long startclk
; /* TOD-clock of request start */
184 unsigned long stopclk
; /* TOD-clock of request interrupt */
185 unsigned long endclk
; /* TOD-clock of request termination */
187 void (*callback
)(struct dasd_ccw_req
*, void *data
);
189 unsigned int proc_bytes
; /* bytes for partial completion */
190 unsigned int trkcount
; /* count formatted tracks */
194 * dasd_ccw_req -> status can be:
196 #define DASD_CQR_FILLED 0x00 /* request is ready to be processed */
197 #define DASD_CQR_DONE 0x01 /* request is completed successfully */
198 #define DASD_CQR_NEED_ERP 0x02 /* request needs recovery action */
199 #define DASD_CQR_IN_ERP 0x03 /* request is in recovery */
200 #define DASD_CQR_FAILED 0x04 /* request is finally failed */
201 #define DASD_CQR_TERMINATED 0x05 /* request was stopped by driver */
203 #define DASD_CQR_QUEUED 0x80 /* request is queued to be processed */
204 #define DASD_CQR_IN_IO 0x81 /* request is currently in IO */
205 #define DASD_CQR_ERROR 0x82 /* request is completed with error */
206 #define DASD_CQR_CLEAR_PENDING 0x83 /* request is clear pending */
207 #define DASD_CQR_CLEARED 0x84 /* request was cleared */
208 #define DASD_CQR_SUCCESS 0x85 /* request was successful */
210 /* default expiration time*/
211 #define DASD_EXPIRES 300
212 #define DASD_EXPIRES_MAX 40000000
213 #define DASD_RETRIES 256
214 #define DASD_RETRIES_MAX 32768
216 /* per dasd_ccw_req flags */
217 #define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */
218 #define DASD_CQR_FLAGS_FAILFAST 1 /* FAILFAST */
219 #define DASD_CQR_VERIFY_PATH 2 /* path verification request */
220 #define DASD_CQR_ALLOW_SLOCK 3 /* Try this request even when lock was
221 * stolen. Should not be combined with
222 * DASD_CQR_FLAGS_USE_ERP
225 * The following flags are used to suppress output of certain errors.
227 #define DASD_CQR_SUPPRESS_NRF 4 /* Suppress 'No Record Found' error */
228 #define DASD_CQR_SUPPRESS_FP 5 /* Suppress 'File Protected' error*/
229 #define DASD_CQR_SUPPRESS_IL 6 /* Suppress 'Incorrect Length' error */
230 #define DASD_CQR_SUPPRESS_CR 7 /* Suppress 'Command Reject' error */
232 #define DASD_REQ_PER_DEV 4
234 /* Signature for error recovery functions. */
235 typedef struct dasd_ccw_req
*(*dasd_erp_fn_t
) (struct dasd_ccw_req
*);
238 * A single CQR can only contain a maximum of 255 CCWs. It is limited by
239 * the locate record and locate record extended count value which can only hold
242 #define DASD_CQR_MAX_CCW 255
245 * Unique identifier for dasd device.
247 #define UA_NOT_CONFIGURED 0x00
248 #define UA_BASE_DEVICE 0x01
249 #define UA_BASE_PAV_ALIAS 0x02
250 #define UA_HYPER_PAV_ALIAS 0x03
263 * the struct dasd_discipline is
264 * sth like a table of virtual functions, if you think of dasd_eckd
266 * no, currently we are not planning to reimplement the driver in C++
268 struct dasd_discipline
{
269 struct module
*owner
;
270 char ebcname
[8]; /* a name used for tagging and printks */
271 char name
[8]; /* a name used for tagging and printks */
273 struct list_head list
; /* used for list of disciplines */
276 * Device recognition functions. check_device is used to verify
277 * the sense data and the information returned by read device
278 * characteristics. It returns 0 if the discipline can be used
279 * for the device in question. uncheck_device is called during
280 * device shutdown to deregister a device from its discipline.
282 int (*check_device
) (struct dasd_device
*);
283 void (*uncheck_device
) (struct dasd_device
*);
286 * do_analysis is used in the step from device state "basic" to
287 * state "accept". It returns 0 if the device can be made ready,
288 * it returns -EMEDIUMTYPE if the device can't be made ready or
289 * -EAGAIN if do_analysis started a ccw that needs to complete
290 * before the analysis may be repeated.
292 int (*do_analysis
) (struct dasd_block
*);
295 * This function is called, when new paths become available.
296 * Disciplins may use this callback to do necessary setup work,
297 * e.g. verify that new path is compatible with the current
300 int (*pe_handler
)(struct dasd_device
*, __u8
, __u8
);
303 * Last things to do when a device is set online, and first things
304 * when it is set offline.
306 int (*basic_to_ready
) (struct dasd_device
*);
307 int (*online_to_ready
) (struct dasd_device
*);
308 int (*basic_to_known
)(struct dasd_device
*);
311 * Initialize block layer request queue.
313 void (*setup_blk_queue
)(struct dasd_block
*);
314 /* (struct dasd_device *);
315 * Device operation functions. build_cp creates a ccw chain for
316 * a block device request, start_io starts the request and
317 * term_IO cancels it (e.g. in case of a timeout). format_device
318 * formats the device and check_device_format compares the format of
319 * a device with the expected format_data.
320 * handle_terminated_request allows to examine a cqr and prepare
323 struct dasd_ccw_req
*(*build_cp
) (struct dasd_device
*,
326 int (*start_IO
) (struct dasd_ccw_req
*);
327 int (*term_IO
) (struct dasd_ccw_req
*);
328 void (*handle_terminated_request
) (struct dasd_ccw_req
*);
329 int (*format_device
) (struct dasd_device
*,
330 struct format_data_t
*, int);
331 int (*check_device_format
)(struct dasd_device
*,
332 struct format_check_t
*, int);
333 int (*free_cp
) (struct dasd_ccw_req
*, struct request
*);
336 * Error recovery functions. examine_error() returns a value that
337 * indicates what to do for an error condition. If examine_error()
338 * returns 'dasd_era_recover' erp_action() is called to create a
339 * special error recovery ccw. erp_postaction() is called after
340 * an error recovery ccw has finished its execution. dump_sense
341 * is called for every error condition to print the sense data
344 dasd_erp_fn_t(*erp_action
) (struct dasd_ccw_req
*);
345 dasd_erp_fn_t(*erp_postaction
) (struct dasd_ccw_req
*);
346 void (*dump_sense
) (struct dasd_device
*, struct dasd_ccw_req
*,
348 void (*dump_sense_dbf
) (struct dasd_device
*, struct irb
*, char *);
349 void (*check_for_device_change
) (struct dasd_device
*,
350 struct dasd_ccw_req
*,
353 /* i/o control functions. */
354 int (*fill_geometry
) (struct dasd_block
*, struct hd_geometry
*);
355 int (*fill_info
) (struct dasd_device
*, struct dasd_information2_t
*);
356 int (*ioctl
) (struct dasd_block
*, unsigned int, void __user
*);
358 /* reload device after state change */
359 int (*reload
) (struct dasd_device
*);
361 int (*get_uid
) (struct dasd_device
*, struct dasd_uid
*);
362 void (*kick_validate
) (struct dasd_device
*);
363 int (*check_attention
)(struct dasd_device
*, __u8
);
364 int (*host_access_count
)(struct dasd_device
*);
365 int (*hosts_print
)(struct dasd_device
*, struct seq_file
*);
366 void (*handle_hpf_error
)(struct dasd_device
*, struct irb
*);
367 void (*disable_hpf
)(struct dasd_device
*);
368 int (*hpf_enabled
)(struct dasd_device
*);
369 void (*reset_path
)(struct dasd_device
*, __u8
);
372 * Extent Space Efficient (ESE) relevant functions
374 int (*is_ese
)(struct dasd_device
*);
376 int (*space_allocated
)(struct dasd_device
*);
377 int (*space_configured
)(struct dasd_device
*);
378 int (*logical_capacity
)(struct dasd_device
*);
379 int (*release_space
)(struct dasd_device
*, struct format_data_t
*);
381 int (*ext_pool_id
)(struct dasd_device
*);
382 int (*ext_size
)(struct dasd_device
*);
383 int (*ext_pool_cap_at_warnlevel
)(struct dasd_device
*);
384 int (*ext_pool_warn_thrshld
)(struct dasd_device
*);
385 int (*ext_pool_oos
)(struct dasd_device
*);
386 int (*ext_pool_exhaust
)(struct dasd_device
*, struct dasd_ccw_req
*);
387 struct dasd_ccw_req
*(*ese_format
)(struct dasd_device
*,
388 struct dasd_ccw_req
*, struct irb
*);
389 int (*ese_read
)(struct dasd_ccw_req
*, struct irb
*);
392 extern struct dasd_discipline
*dasd_diag_discipline_pointer
;
395 * Notification numbers for extended error reporting notifications:
396 * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's
397 * eer pointer) is freed. The error reporting module needs to do all necessary
399 * The DASD_EER_TRIGGER notification sends the actual error reports (triggers).
401 #define DASD_EER_DISABLE 0
402 #define DASD_EER_TRIGGER 1
404 /* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */
405 #define DASD_EER_FATALERROR 1
406 #define DASD_EER_NOPATH 2
407 #define DASD_EER_STATECHANGE 3
408 #define DASD_EER_PPRCSUSPEND 4
409 #define DASD_EER_NOSPC 5
411 /* DASD path handling */
413 #define DASD_PATH_OPERATIONAL 1
414 #define DASD_PATH_TBV 2
415 #define DASD_PATH_PP 3
416 #define DASD_PATH_NPP 4
417 #define DASD_PATH_MISCABLED 5
418 #define DASD_PATH_NOHPF 6
419 #define DASD_PATH_CUIR 7
420 #define DASD_PATH_IFCC 8
421 #define DASD_PATH_FCSEC 9
423 #define DASD_THRHLD_MAX 4294967295U
424 #define DASD_INTERVAL_MAX 4294967295U
426 /* FC Endpoint Security Capabilities */
427 #define DASD_FC_SECURITY_UNSUP 0
428 #define DASD_FC_SECURITY_AUTH 1
429 #define DASD_FC_SECURITY_ENC_FCSP2 2
430 #define DASD_FC_SECURITY_ENC_ERAS 3
432 #define DASD_FC_SECURITY_ENC_STR "Encryption"
433 static const struct {
436 } dasd_path_fcs_mnemonics
[] = {
437 { DASD_FC_SECURITY_UNSUP
, "Unsupported" },
438 { DASD_FC_SECURITY_AUTH
, "Authentication" },
439 { DASD_FC_SECURITY_ENC_FCSP2
, DASD_FC_SECURITY_ENC_STR
},
440 { DASD_FC_SECURITY_ENC_ERAS
, DASD_FC_SECURITY_ENC_STR
},
443 static inline char *dasd_path_get_fcs_str(int val
)
447 for (i
= 0; i
< ARRAY_SIZE(dasd_path_fcs_mnemonics
); i
++) {
448 if (dasd_path_fcs_mnemonics
[i
].value
== val
)
449 return dasd_path_fcs_mnemonics
[i
].name
;
452 return dasd_path_fcs_mnemonics
[0].name
;
460 struct dasd_conf_data
*conf_data
;
461 atomic_t error_count
;
462 unsigned long errorclk
;
468 #define to_dasd_path(path) container_of(path, struct dasd_path, kobj)
470 static inline void dasd_path_release(struct kobject
*kobj
)
472 /* Memory for the dasd_path kobject is freed when dasd_free_device() is called */
476 struct dasd_profile_info
{
477 /* legacy part of profile data, as in dasd_profile_info_t */
478 unsigned int dasd_io_reqs
; /* number of requests processed */
479 unsigned int dasd_io_sects
; /* number of sectors processed */
480 unsigned int dasd_io_secs
[32]; /* histogram of request's sizes */
481 unsigned int dasd_io_times
[32]; /* histogram of requests's times */
482 unsigned int dasd_io_timps
[32]; /* h. of requests's times per sector */
483 unsigned int dasd_io_time1
[32]; /* hist. of time from build to start */
484 unsigned int dasd_io_time2
[32]; /* hist. of time from start to irq */
485 unsigned int dasd_io_time2ps
[32]; /* hist. of time from start to irq */
486 unsigned int dasd_io_time3
[32]; /* hist. of time from irq to end */
487 unsigned int dasd_io_nr_req
[32]; /* hist. of # of requests in chanq */
490 struct timespec64 starttod
; /* time of start or last reset */
491 unsigned int dasd_io_alias
; /* requests using an alias */
492 unsigned int dasd_io_tpm
; /* requests using transport mode */
493 unsigned int dasd_read_reqs
; /* total number of read requests */
494 unsigned int dasd_read_sects
; /* total number read sectors */
495 unsigned int dasd_read_alias
; /* read request using an alias */
496 unsigned int dasd_read_tpm
; /* read requests in transport mode */
497 unsigned int dasd_read_secs
[32]; /* histogram of request's sizes */
498 unsigned int dasd_read_times
[32]; /* histogram of requests's times */
499 unsigned int dasd_read_time1
[32]; /* hist. time from build to start */
500 unsigned int dasd_read_time2
[32]; /* hist. of time from start to irq */
501 unsigned int dasd_read_time3
[32]; /* hist. of time from irq to end */
502 unsigned int dasd_read_nr_req
[32]; /* hist. of # of requests in chanq */
503 unsigned long dasd_sum_times
; /* sum of request times */
504 unsigned long dasd_sum_time_str
; /* sum of time from build to start */
505 unsigned long dasd_sum_time_irq
; /* sum of time from start to irq */
506 unsigned long dasd_sum_time_end
; /* sum of time from irq to end */
509 struct dasd_profile
{
510 struct dentry
*dentry
;
511 struct dasd_profile_info
*data
;
515 struct dasd_format_entry
{
516 struct list_head list
;
521 /* Block device stuff. */
522 struct dasd_block
*block
;
524 unsigned int devindex
;
525 unsigned long flags
; /* per device flags */
526 unsigned short features
; /* copy of devmap-features (read-only!) */
528 /* extended error reporting stuff (eer) */
529 struct dasd_ccw_req
*eer_cqr
;
531 /* Device discipline stuff. */
532 struct dasd_discipline
*discipline
;
533 struct dasd_discipline
*base_discipline
;
535 struct dasd_path path
[8];
538 /* Device state and target state. */
540 struct mutex state_mutex
;
541 int stopped
; /* device (ccw_device_start) was stopped */
543 /* reference count. */
546 /* ccw queue and memory for static ccw/erp buffers. */
547 struct list_head ccw_queue
;
552 struct list_head ccw_chunks
;
553 struct list_head erp_chunks
;
554 struct list_head ese_chunks
;
556 atomic_t tasklet_scheduled
;
557 struct tasklet_struct tasklet
;
558 struct work_struct kick_work
;
559 struct work_struct reload_device
;
560 struct work_struct kick_validate
;
561 struct work_struct suc_work
;
562 struct work_struct requeue_requests
;
563 struct timer_list timer
;
565 debug_info_t
*debug_area
;
567 struct ccw_device
*cdev
;
569 /* hook for alias management */
570 struct list_head alias_list
;
572 /* default expiration time in s */
573 unsigned long default_expires
;
574 unsigned long default_retries
;
576 unsigned long blk_timeout
;
578 unsigned long path_thrhld
;
579 unsigned long path_interval
;
581 struct dentry
*debugfs_dentry
;
582 struct dentry
*hosts_dentry
;
583 struct dasd_profile profile
;
584 struct dasd_format_entry format_entry
;
585 struct kset
*paths_info
;
589 /* Block device stuff. */
591 struct request_queue
*request_queue
;
592 spinlock_t request_queue_lock
;
593 struct blk_mq_tag_set tag_set
;
594 struct block_device
*bdev
;
597 unsigned long blocks
; /* size of volume in blocks */
598 unsigned int bp_block
; /* bytes per block */
599 unsigned int s2b_shift
; /* log2 (bp_block/512) */
601 struct dasd_device
*base
;
602 struct list_head ccw_queue
;
603 spinlock_t queue_lock
;
605 atomic_t tasklet_scheduled
;
606 struct tasklet_struct tasklet
;
607 struct timer_list timer
;
609 struct dentry
*debugfs_dentry
;
610 struct dasd_profile profile
;
612 struct list_head format_list
;
613 spinlock_t format_lock
;
617 struct dasd_attention_data
{
618 struct dasd_device
*device
;
626 /* reasons why device (ccw_device_start) was stopped */
627 #define DASD_STOPPED_NOT_ACC 1 /* not accessible */
628 #define DASD_STOPPED_QUIESCE 2 /* Quiesced */
629 #define DASD_STOPPED_PENDING 4 /* long busy */
630 #define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */
631 #define DASD_STOPPED_SU 16 /* summary unit check handling */
632 #define DASD_STOPPED_NOSPC 128 /* no space left */
634 /* per device flags */
635 #define DASD_FLAG_OFFLINE 3 /* device is in offline processing */
636 #define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */
637 #define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */
638 #define DASD_FLAG_DEVICE_RO 6 /* The device itself is read-only. Don't
639 * confuse this with the user specified
642 #define DASD_FLAG_IS_RESERVED 7 /* The device is reserved */
643 #define DASD_FLAG_LOCK_STOLEN 8 /* The device lock was stolen */
644 #define DASD_FLAG_SUSPENDED 9 /* The device was suspended */
645 #define DASD_FLAG_SAFE_OFFLINE 10 /* safe offline processing requested*/
646 #define DASD_FLAG_SAFE_OFFLINE_RUNNING 11 /* safe offline running */
647 #define DASD_FLAG_ABORTALL 12 /* Abort all noretry requests */
648 #define DASD_FLAG_PATH_VERIFY 13 /* Path verification worker running */
649 #define DASD_FLAG_SUC 14 /* unhandled summary unit check */
651 #define DASD_SLEEPON_START_TAG ((void *) 1)
652 #define DASD_SLEEPON_END_TAG ((void *) 2)
654 void dasd_put_device_wake(struct dasd_device
*);
657 * Reference count inliners
660 dasd_get_device(struct dasd_device
*device
)
662 atomic_inc(&device
->ref_count
);
666 dasd_put_device(struct dasd_device
*device
)
668 if (atomic_dec_return(&device
->ref_count
) == 0)
669 dasd_put_device_wake(device
);
673 * The static memory in ccw_mem and erp_mem is managed by a sorted
674 * list of free memory chunks.
678 struct list_head list
;
680 } __attribute__ ((aligned(8)));
683 dasd_init_chunklist(struct list_head
*chunk_list
, void *mem
,
686 struct dasd_mchunk
*chunk
;
688 INIT_LIST_HEAD(chunk_list
);
689 chunk
= (struct dasd_mchunk
*) mem
;
690 chunk
->size
= size
- sizeof(struct dasd_mchunk
);
691 list_add(&chunk
->list
, chunk_list
);
695 dasd_alloc_chunk(struct list_head
*chunk_list
, unsigned long size
)
697 struct dasd_mchunk
*chunk
, *tmp
;
699 size
= (size
+ 7L) & -8L;
700 list_for_each_entry(chunk
, chunk_list
, list
) {
701 if (chunk
->size
< size
)
703 if (chunk
->size
> size
+ sizeof(struct dasd_mchunk
)) {
704 char *endaddr
= (char *) (chunk
+ 1) + chunk
->size
;
705 tmp
= (struct dasd_mchunk
*) (endaddr
- size
) - 1;
707 chunk
->size
-= size
+ sizeof(struct dasd_mchunk
);
710 list_del(&chunk
->list
);
711 return (void *) (chunk
+ 1);
717 dasd_free_chunk(struct list_head
*chunk_list
, void *mem
)
719 struct dasd_mchunk
*chunk
, *tmp
;
720 struct list_head
*p
, *left
;
722 chunk
= (struct dasd_mchunk
*)
723 ((char *) mem
- sizeof(struct dasd_mchunk
));
724 /* Find out the left neighbour in chunk_list. */
726 list_for_each(p
, chunk_list
) {
727 if (list_entry(p
, struct dasd_mchunk
, list
) > chunk
)
731 /* Try to merge with right neighbour = next element from left. */
732 if (left
->next
!= chunk_list
) {
733 tmp
= list_entry(left
->next
, struct dasd_mchunk
, list
);
734 if ((char *) (chunk
+ 1) + chunk
->size
== (char *) tmp
) {
735 list_del(&tmp
->list
);
736 chunk
->size
+= tmp
->size
+ sizeof(struct dasd_mchunk
);
739 /* Try to merge with left neighbour. */
740 if (left
!= chunk_list
) {
741 tmp
= list_entry(left
, struct dasd_mchunk
, list
);
742 if ((char *) (tmp
+ 1) + tmp
->size
== (char *) chunk
) {
743 tmp
->size
+= chunk
->size
+ sizeof(struct dasd_mchunk
);
747 __list_add(&chunk
->list
, left
, left
->next
);
751 * Check if bsize is in { 512, 1024, 2048, 4096 }
754 dasd_check_blocksize(int bsize
)
756 if (bsize
< 512 || bsize
> 4096 || !is_power_of_2(bsize
))
762 * return the callback data of the original request in case there are
763 * ERP requests build on top of it
765 static inline void *dasd_get_callback_data(struct dasd_ccw_req
*cqr
)
770 return cqr
->callback_data
;
773 /* externals in dasd.c */
774 #define DASD_PROFILE_OFF 0
775 #define DASD_PROFILE_ON 1
776 #define DASD_PROFILE_GLOBAL_ONLY 2
778 extern debug_info_t
*dasd_debug_area
;
779 extern struct dasd_profile dasd_global_profile
;
780 extern unsigned int dasd_global_profile_level
;
781 extern const struct block_device_operations dasd_device_operations
;
783 extern struct kmem_cache
*dasd_page_cache
;
785 struct dasd_ccw_req
*
786 dasd_smalloc_request(int, int, int, struct dasd_device
*, struct dasd_ccw_req
*);
787 struct dasd_ccw_req
*dasd_fmalloc_request(int, int, int, struct dasd_device
*);
788 void dasd_sfree_request(struct dasd_ccw_req
*, struct dasd_device
*);
789 void dasd_ffree_request(struct dasd_ccw_req
*, struct dasd_device
*);
790 void dasd_wakeup_cb(struct dasd_ccw_req
*, void *);
792 struct dasd_device
*dasd_alloc_device(void);
793 void dasd_free_device(struct dasd_device
*);
795 struct dasd_block
*dasd_alloc_block(void);
796 void dasd_free_block(struct dasd_block
*);
798 enum blk_eh_timer_return
dasd_times_out(struct request
*req
);
800 void dasd_enable_device(struct dasd_device
*);
801 void dasd_set_target_state(struct dasd_device
*, int);
802 void dasd_kick_device(struct dasd_device
*);
803 void dasd_reload_device(struct dasd_device
*);
804 void dasd_schedule_requeue(struct dasd_device
*);
806 void dasd_add_request_head(struct dasd_ccw_req
*);
807 void dasd_add_request_tail(struct dasd_ccw_req
*);
808 int dasd_start_IO(struct dasd_ccw_req
*);
809 int dasd_term_IO(struct dasd_ccw_req
*);
810 void dasd_schedule_device_bh(struct dasd_device
*);
811 void dasd_schedule_block_bh(struct dasd_block
*);
812 int dasd_sleep_on(struct dasd_ccw_req
*);
813 int dasd_sleep_on_queue(struct list_head
*);
814 int dasd_sleep_on_immediatly(struct dasd_ccw_req
*);
815 int dasd_sleep_on_queue_interruptible(struct list_head
*);
816 int dasd_sleep_on_interruptible(struct dasd_ccw_req
*);
817 void dasd_device_set_timer(struct dasd_device
*, int);
818 void dasd_device_clear_timer(struct dasd_device
*);
819 void dasd_block_set_timer(struct dasd_block
*, int);
820 void dasd_block_clear_timer(struct dasd_block
*);
821 int dasd_cancel_req(struct dasd_ccw_req
*);
822 int dasd_flush_device_queue(struct dasd_device
*);
823 int dasd_generic_probe(struct ccw_device
*);
824 void dasd_generic_free_discipline(struct dasd_device
*);
825 void dasd_generic_remove (struct ccw_device
*cdev
);
826 int dasd_generic_set_online(struct ccw_device
*, struct dasd_discipline
*);
827 int dasd_generic_set_offline (struct ccw_device
*cdev
);
828 int dasd_generic_notify(struct ccw_device
*, int);
829 int dasd_generic_last_path_gone(struct dasd_device
*);
830 int dasd_generic_path_operational(struct dasd_device
*);
831 void dasd_generic_shutdown(struct ccw_device
*);
833 void dasd_generic_handle_state_change(struct dasd_device
*);
834 enum uc_todo
dasd_generic_uc_handler(struct ccw_device
*, struct irb
*);
835 void dasd_generic_path_event(struct ccw_device
*, int *);
836 int dasd_generic_verify_path(struct dasd_device
*, __u8
);
837 void dasd_generic_space_exhaust(struct dasd_device
*, struct dasd_ccw_req
*);
838 void dasd_generic_space_avail(struct dasd_device
*);
840 int dasd_generic_read_dev_chars(struct dasd_device
*, int, void *, int);
841 char *dasd_get_sense(struct irb
*);
843 void dasd_device_set_stop_bits(struct dasd_device
*, int);
844 void dasd_device_remove_stop_bits(struct dasd_device
*, int);
846 int dasd_device_is_ro(struct dasd_device
*);
848 void dasd_profile_reset(struct dasd_profile
*);
849 int dasd_profile_on(struct dasd_profile
*);
850 void dasd_profile_off(struct dasd_profile
*);
851 char *dasd_get_user_string(const char __user
*, size_t);
853 /* externals in dasd_devmap.c */
854 extern int dasd_max_devindex
;
855 extern int dasd_probeonly
;
856 extern int dasd_autodetect
;
857 extern int dasd_nopav
;
858 extern int dasd_nofcx
;
860 int dasd_devmap_init(void);
861 void dasd_devmap_exit(void);
863 struct dasd_device
*dasd_create_device(struct ccw_device
*);
864 void dasd_delete_device(struct dasd_device
*);
866 int dasd_get_feature(struct ccw_device
*, int);
867 int dasd_set_feature(struct ccw_device
*, int, int);
869 extern const struct attribute_group
*dasd_dev_groups
[];
870 void dasd_path_create_kobj(struct dasd_device
*, int);
871 void dasd_path_create_kobjects(struct dasd_device
*);
872 void dasd_path_remove_kobjects(struct dasd_device
*);
874 struct dasd_device
*dasd_device_from_cdev(struct ccw_device
*);
875 struct dasd_device
*dasd_device_from_cdev_locked(struct ccw_device
*);
876 struct dasd_device
*dasd_device_from_devindex(int);
878 void dasd_add_link_to_gendisk(struct gendisk
*, struct dasd_device
*);
879 struct dasd_device
*dasd_device_from_gendisk(struct gendisk
*);
881 int dasd_parse(void) __init
;
882 int dasd_busid_known(const char *);
884 /* externals in dasd_gendisk.c */
885 int dasd_gendisk_init(void);
886 void dasd_gendisk_exit(void);
887 int dasd_gendisk_alloc(struct dasd_block
*);
888 void dasd_gendisk_free(struct dasd_block
*);
889 int dasd_scan_partitions(struct dasd_block
*);
890 void dasd_destroy_partitions(struct dasd_block
*);
892 /* externals in dasd_ioctl.c */
893 int dasd_ioctl(struct block_device
*, fmode_t
, unsigned int, unsigned long);
894 int dasd_set_read_only(struct block_device
*bdev
, bool ro
);
896 /* externals in dasd_proc.c */
897 int dasd_proc_init(void);
898 void dasd_proc_exit(void);
900 /* externals in dasd_erp.c */
901 struct dasd_ccw_req
*dasd_default_erp_action(struct dasd_ccw_req
*);
902 struct dasd_ccw_req
*dasd_default_erp_postaction(struct dasd_ccw_req
*);
903 struct dasd_ccw_req
*dasd_alloc_erp_request(unsigned int, int, int,
904 struct dasd_device
*);
905 void dasd_free_erp_request(struct dasd_ccw_req
*, struct dasd_device
*);
906 void dasd_log_sense(struct dasd_ccw_req
*, struct irb
*);
907 void dasd_log_sense_dbf(struct dasd_ccw_req
*cqr
, struct irb
*irb
);
909 /* externals in dasd_3990_erp.c */
910 struct dasd_ccw_req
*dasd_3990_erp_action(struct dasd_ccw_req
*);
911 void dasd_3990_erp_handle_sim(struct dasd_device
*, char *);
913 /* externals in dasd_eer.c */
914 #ifdef CONFIG_DASD_EER
915 int dasd_eer_init(void);
916 void dasd_eer_exit(void);
917 int dasd_eer_enable(struct dasd_device
*);
918 void dasd_eer_disable(struct dasd_device
*);
919 void dasd_eer_write(struct dasd_device
*, struct dasd_ccw_req
*cqr
,
921 void dasd_eer_snss(struct dasd_device
*);
923 static inline int dasd_eer_enabled(struct dasd_device
*device
)
925 return device
->eer_cqr
!= NULL
;
928 #define dasd_eer_init() (0)
929 #define dasd_eer_exit() do { } while (0)
930 #define dasd_eer_enable(d) (0)
931 #define dasd_eer_disable(d) do { } while (0)
932 #define dasd_eer_write(d,c,i) do { } while (0)
933 #define dasd_eer_snss(d) do { } while (0)
934 #define dasd_eer_enabled(d) (0)
935 #endif /* CONFIG_DASD_ERR */
938 /* DASD path handling functions */
941 * helper functions to modify bit masks for a given channel path for a device
943 static inline int dasd_path_is_operational(struct dasd_device
*device
, int chp
)
945 return test_bit(DASD_PATH_OPERATIONAL
, &device
->path
[chp
].flags
);
948 static inline int dasd_path_need_verify(struct dasd_device
*device
, int chp
)
950 return test_bit(DASD_PATH_TBV
, &device
->path
[chp
].flags
);
953 static inline void dasd_path_verify(struct dasd_device
*device
, int chp
)
955 __set_bit(DASD_PATH_TBV
, &device
->path
[chp
].flags
);
958 static inline void dasd_path_clear_verify(struct dasd_device
*device
, int chp
)
960 __clear_bit(DASD_PATH_TBV
, &device
->path
[chp
].flags
);
963 static inline void dasd_path_clear_all_verify(struct dasd_device
*device
)
967 for (chp
= 0; chp
< 8; chp
++)
968 dasd_path_clear_verify(device
, chp
);
971 static inline void dasd_path_fcsec(struct dasd_device
*device
, int chp
)
973 __set_bit(DASD_PATH_FCSEC
, &device
->path
[chp
].flags
);
976 static inline void dasd_path_clear_fcsec(struct dasd_device
*device
, int chp
)
978 __clear_bit(DASD_PATH_FCSEC
, &device
->path
[chp
].flags
);
981 static inline int dasd_path_need_fcsec(struct dasd_device
*device
, int chp
)
983 return test_bit(DASD_PATH_FCSEC
, &device
->path
[chp
].flags
);
986 static inline void dasd_path_clear_all_fcsec(struct dasd_device
*device
)
990 for (chp
= 0; chp
< 8; chp
++)
991 dasd_path_clear_fcsec(device
, chp
);
994 static inline void dasd_path_operational(struct dasd_device
*device
, int chp
)
996 __set_bit(DASD_PATH_OPERATIONAL
, &device
->path
[chp
].flags
);
997 device
->opm
|= (0x80 >> chp
);
1000 static inline void dasd_path_nonpreferred(struct dasd_device
*device
, int chp
)
1002 __set_bit(DASD_PATH_NPP
, &device
->path
[chp
].flags
);
1005 static inline int dasd_path_is_nonpreferred(struct dasd_device
*device
, int chp
)
1007 return test_bit(DASD_PATH_NPP
, &device
->path
[chp
].flags
);
1010 static inline void dasd_path_clear_nonpreferred(struct dasd_device
*device
,
1013 __clear_bit(DASD_PATH_NPP
, &device
->path
[chp
].flags
);
1016 static inline void dasd_path_preferred(struct dasd_device
*device
, int chp
)
1018 __set_bit(DASD_PATH_PP
, &device
->path
[chp
].flags
);
1021 static inline int dasd_path_is_preferred(struct dasd_device
*device
, int chp
)
1023 return test_bit(DASD_PATH_PP
, &device
->path
[chp
].flags
);
1026 static inline void dasd_path_clear_preferred(struct dasd_device
*device
,
1029 __clear_bit(DASD_PATH_PP
, &device
->path
[chp
].flags
);
1032 static inline void dasd_path_clear_oper(struct dasd_device
*device
, int chp
)
1034 __clear_bit(DASD_PATH_OPERATIONAL
, &device
->path
[chp
].flags
);
1035 device
->opm
&= ~(0x80 >> chp
);
1038 static inline void dasd_path_clear_cable(struct dasd_device
*device
, int chp
)
1040 __clear_bit(DASD_PATH_MISCABLED
, &device
->path
[chp
].flags
);
1043 static inline void dasd_path_cuir(struct dasd_device
*device
, int chp
)
1045 __set_bit(DASD_PATH_CUIR
, &device
->path
[chp
].flags
);
1048 static inline int dasd_path_is_cuir(struct dasd_device
*device
, int chp
)
1050 return test_bit(DASD_PATH_CUIR
, &device
->path
[chp
].flags
);
1053 static inline void dasd_path_clear_cuir(struct dasd_device
*device
, int chp
)
1055 __clear_bit(DASD_PATH_CUIR
, &device
->path
[chp
].flags
);
1058 static inline void dasd_path_ifcc(struct dasd_device
*device
, int chp
)
1060 set_bit(DASD_PATH_IFCC
, &device
->path
[chp
].flags
);
1063 static inline int dasd_path_is_ifcc(struct dasd_device
*device
, int chp
)
1065 return test_bit(DASD_PATH_IFCC
, &device
->path
[chp
].flags
);
1068 static inline void dasd_path_clear_ifcc(struct dasd_device
*device
, int chp
)
1070 clear_bit(DASD_PATH_IFCC
, &device
->path
[chp
].flags
);
1073 static inline void dasd_path_clear_nohpf(struct dasd_device
*device
, int chp
)
1075 __clear_bit(DASD_PATH_NOHPF
, &device
->path
[chp
].flags
);
1078 static inline void dasd_path_miscabled(struct dasd_device
*device
, int chp
)
1080 __set_bit(DASD_PATH_MISCABLED
, &device
->path
[chp
].flags
);
1083 static inline int dasd_path_is_miscabled(struct dasd_device
*device
, int chp
)
1085 return test_bit(DASD_PATH_MISCABLED
, &device
->path
[chp
].flags
);
1088 static inline void dasd_path_nohpf(struct dasd_device
*device
, int chp
)
1090 __set_bit(DASD_PATH_NOHPF
, &device
->path
[chp
].flags
);
1093 static inline int dasd_path_is_nohpf(struct dasd_device
*device
, int chp
)
1095 return test_bit(DASD_PATH_NOHPF
, &device
->path
[chp
].flags
);
1099 * get functions for path masks
1100 * will return a path masks for the given device
1103 static inline __u8
dasd_path_get_opm(struct dasd_device
*device
)
1108 static inline __u8
dasd_path_get_tbvpm(struct dasd_device
*device
)
1113 for (chp
= 0; chp
< 8; chp
++)
1114 if (dasd_path_need_verify(device
, chp
))
1115 tbvpm
|= 0x80 >> chp
;
1119 static inline int dasd_path_get_fcsecpm(struct dasd_device
*device
)
1123 for (chp
= 0; chp
< 8; chp
++)
1124 if (dasd_path_need_fcsec(device
, chp
))
1130 static inline __u8
dasd_path_get_nppm(struct dasd_device
*device
)
1135 for (chp
= 0; chp
< 8; chp
++) {
1136 if (dasd_path_is_nonpreferred(device
, chp
))
1142 static inline __u8
dasd_path_get_ppm(struct dasd_device
*device
)
1147 for (chp
= 0; chp
< 8; chp
++)
1148 if (dasd_path_is_preferred(device
, chp
))
1153 static inline __u8
dasd_path_get_cablepm(struct dasd_device
*device
)
1156 __u8 cablepm
= 0x00;
1158 for (chp
= 0; chp
< 8; chp
++)
1159 if (dasd_path_is_miscabled(device
, chp
))
1160 cablepm
|= 0x80 >> chp
;
1164 static inline __u8
dasd_path_get_cuirpm(struct dasd_device
*device
)
1169 for (chp
= 0; chp
< 8; chp
++)
1170 if (dasd_path_is_cuir(device
, chp
))
1171 cuirpm
|= 0x80 >> chp
;
1175 static inline __u8
dasd_path_get_ifccpm(struct dasd_device
*device
)
1180 for (chp
= 0; chp
< 8; chp
++)
1181 if (dasd_path_is_ifcc(device
, chp
))
1182 ifccpm
|= 0x80 >> chp
;
1186 static inline __u8
dasd_path_get_hpfpm(struct dasd_device
*device
)
1191 for (chp
= 0; chp
< 8; chp
++)
1192 if (dasd_path_is_nohpf(device
, chp
))
1193 hpfpm
|= 0x80 >> chp
;
1197 static inline u8
dasd_path_get_fcs_path(struct dasd_device
*device
, int chp
)
1199 return device
->path
[chp
].fc_security
;
1202 static inline int dasd_path_get_fcs_device(struct dasd_device
*device
)
1207 for (chp
= 0; chp
< 8; chp
++) {
1208 if (device
->opm
& (0x80 >> chp
)) {
1209 fc_sec
= device
->path
[chp
].fc_security
;
1213 for (; chp
< 8; chp
++) {
1214 if (device
->opm
& (0x80 >> chp
))
1215 if (device
->path
[chp
].fc_security
!= fc_sec
)
1223 * add functions for path masks
1224 * the existing path mask will be extended by the given path mask
1226 static inline void dasd_path_add_tbvpm(struct dasd_device
*device
, __u8 pm
)
1230 for (chp
= 0; chp
< 8; chp
++)
1231 if (pm
& (0x80 >> chp
))
1232 dasd_path_verify(device
, chp
);
1235 static inline __u8
dasd_path_get_notoperpm(struct dasd_device
*device
)
1240 for (chp
= 0; chp
< 8; chp
++)
1241 if (dasd_path_is_nohpf(device
, chp
) ||
1242 dasd_path_is_ifcc(device
, chp
) ||
1243 dasd_path_is_cuir(device
, chp
) ||
1244 dasd_path_is_miscabled(device
, chp
))
1245 nopm
|= 0x80 >> chp
;
1249 static inline void dasd_path_add_opm(struct dasd_device
*device
, __u8 pm
)
1253 for (chp
= 0; chp
< 8; chp
++)
1254 if (pm
& (0x80 >> chp
)) {
1255 dasd_path_operational(device
, chp
);
1257 * if the path is used
1258 * it should not be in one of the negative lists
1260 dasd_path_clear_nohpf(device
, chp
);
1261 dasd_path_clear_cuir(device
, chp
);
1262 dasd_path_clear_cable(device
, chp
);
1263 dasd_path_clear_ifcc(device
, chp
);
1267 static inline void dasd_path_add_cablepm(struct dasd_device
*device
, __u8 pm
)
1271 for (chp
= 0; chp
< 8; chp
++)
1272 if (pm
& (0x80 >> chp
))
1273 dasd_path_miscabled(device
, chp
);
1276 static inline void dasd_path_add_cuirpm(struct dasd_device
*device
, __u8 pm
)
1280 for (chp
= 0; chp
< 8; chp
++)
1281 if (pm
& (0x80 >> chp
))
1282 dasd_path_cuir(device
, chp
);
1285 static inline void dasd_path_add_ifccpm(struct dasd_device
*device
, __u8 pm
)
1289 for (chp
= 0; chp
< 8; chp
++)
1290 if (pm
& (0x80 >> chp
))
1291 dasd_path_ifcc(device
, chp
);
1294 static inline void dasd_path_add_nppm(struct dasd_device
*device
, __u8 pm
)
1298 for (chp
= 0; chp
< 8; chp
++)
1299 if (pm
& (0x80 >> chp
))
1300 dasd_path_nonpreferred(device
, chp
);
1303 static inline void dasd_path_add_nohpfpm(struct dasd_device
*device
, __u8 pm
)
1307 for (chp
= 0; chp
< 8; chp
++)
1308 if (pm
& (0x80 >> chp
))
1309 dasd_path_nohpf(device
, chp
);
1312 static inline void dasd_path_add_ppm(struct dasd_device
*device
, __u8 pm
)
1316 for (chp
= 0; chp
< 8; chp
++)
1317 if (pm
& (0x80 >> chp
))
1318 dasd_path_preferred(device
, chp
);
1321 static inline void dasd_path_add_fcsecpm(struct dasd_device
*device
, __u8 pm
)
1325 for (chp
= 0; chp
< 8; chp
++)
1326 if (pm
& (0x80 >> chp
))
1327 dasd_path_fcsec(device
, chp
);
1331 * set functions for path masks
1332 * the existing path mask will be replaced by the given path mask
1334 static inline void dasd_path_set_tbvpm(struct dasd_device
*device
, __u8 pm
)
1338 for (chp
= 0; chp
< 8; chp
++)
1339 if (pm
& (0x80 >> chp
))
1340 dasd_path_verify(device
, chp
);
1342 dasd_path_clear_verify(device
, chp
);
1345 static inline void dasd_path_set_opm(struct dasd_device
*device
, __u8 pm
)
1349 for (chp
= 0; chp
< 8; chp
++) {
1350 dasd_path_clear_oper(device
, chp
);
1351 if (pm
& (0x80 >> chp
)) {
1352 dasd_path_operational(device
, chp
);
1354 * if the path is used
1355 * it should not be in one of the negative lists
1357 dasd_path_clear_nohpf(device
, chp
);
1358 dasd_path_clear_cuir(device
, chp
);
1359 dasd_path_clear_cable(device
, chp
);
1360 dasd_path_clear_ifcc(device
, chp
);
1366 * remove functions for path masks
1367 * the existing path mask will be cleared with the given path mask
1369 static inline void dasd_path_remove_opm(struct dasd_device
*device
, __u8 pm
)
1373 for (chp
= 0; chp
< 8; chp
++) {
1374 if (pm
& (0x80 >> chp
))
1375 dasd_path_clear_oper(device
, chp
);
1380 * add the newly available path to the to be verified pm and remove it from
1381 * normal operation until it is verified
1383 static inline void dasd_path_available(struct dasd_device
*device
, int chp
)
1385 dasd_path_clear_oper(device
, chp
);
1386 dasd_path_verify(device
, chp
);
1389 static inline void dasd_path_notoper(struct dasd_device
*device
, int chp
)
1391 dasd_path_clear_oper(device
, chp
);
1392 dasd_path_clear_preferred(device
, chp
);
1393 dasd_path_clear_nonpreferred(device
, chp
);
1396 static inline void dasd_path_fcsec_update(struct dasd_device
*device
, int chp
)
1398 dasd_path_fcsec(device
, chp
);
1402 * remove all paths from normal operation
1404 static inline void dasd_path_no_path(struct dasd_device
*device
)
1408 for (chp
= 0; chp
< 8; chp
++)
1409 dasd_path_notoper(device
, chp
);
1411 dasd_path_clear_all_verify(device
);
1414 /* end - path handling */