1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
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
8 */
9
10 #ifndef DASD_INT_H
11 #define DASD_INT_H
12
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)
16
17 /*
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.
25 *
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.
38 */
39
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
46
47 #include <linux/module.h>
48 #include <linux/wait.h>
49 #include <linux/blkdev.h>
50 #include <linux/genhd.h>
51 #include <linux/hdreg.h>
52 #include <linux/interrupt.h>
53 #include <linux/log2.h>
54 #include <asm/ccwdev.h>
55 #include <linux/workqueue.h>
56 #include <asm/debug.h>
57 #include <asm/dasd.h>
58 #include <asm/idals.h>
59 #include <linux/bitops.h>
60 #include <linux/blk-mq.h>
61
62 /* DASD discipline magic */
63 #define DASD_ECKD_MAGIC 0xC5C3D2C4
64 #define DASD_DIAG_MAGIC 0xC4C9C1C7
65 #define DASD_FBA_MAGIC 0xC6C2C140
66
67 /*
68 * SECTION: Type definitions
69 */
70 struct dasd_device;
71 struct dasd_block;
72
73 /* BIT DEFINITIONS FOR SENSE DATA */
74 #define DASD_SENSE_BIT_0 0x80
75 #define DASD_SENSE_BIT_1 0x40
76 #define DASD_SENSE_BIT_2 0x20
77 #define DASD_SENSE_BIT_3 0x10
78
79 /* BIT DEFINITIONS FOR SIM SENSE */
80 #define DASD_SIM_SENSE 0x0F
81 #define DASD_SIM_MSG_TO_OP 0x03
82 #define DASD_SIM_LOG 0x0C
83
84 /* lock class for nested cdev lock */
85 #define CDEV_NESTED_FIRST 1
86 #define CDEV_NESTED_SECOND 2
87
88 /*
89 * SECTION: MACROs for klogd and s390 debug feature (dbf)
90 */
91 #define DBF_DEV_EVENT(d_level, d_device, d_str, d_data...) \
92 do { \
93 debug_sprintf_event(d_device->debug_area, \
94 d_level, \
95 d_str "\n", \
96 d_data); \
97 } while(0)
98
99 #define DBF_EVENT(d_level, d_str, d_data...)\
100 do { \
101 debug_sprintf_event(dasd_debug_area, \
102 d_level,\
103 d_str "\n", \
104 d_data); \
105 } while(0)
106
107 #define DBF_EVENT_DEVID(d_level, d_cdev, d_str, d_data...) \
108 do { \
109 struct ccw_dev_id __dev_id; \
110 ccw_device_get_id(d_cdev, &__dev_id); \
111 debug_sprintf_event(dasd_debug_area, \
112 d_level, \
113 "0.%x.%04x " d_str "\n", \
114 __dev_id.ssid, __dev_id.devno, d_data); \
115 } while (0)
116
117 /* limit size for an errorstring */
118 #define ERRORLENGTH 30
119
120 /* definition of dbf debug levels */
121 #define DBF_EMERG 0 /* system is unusable */
122 #define DBF_ALERT 1 /* action must be taken immediately */
123 #define DBF_CRIT 2 /* critical conditions */
124 #define DBF_ERR 3 /* error conditions */
125 #define DBF_WARNING 4 /* warning conditions */
126 #define DBF_NOTICE 5 /* normal but significant condition */
127 #define DBF_INFO 6 /* informational */
128 #define DBF_DEBUG 6 /* debug-level messages */
129
130 /* messages to be written via klogd and dbf */
131 #define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\
132 do { \
133 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
134 dev_name(&d_device->cdev->dev), d_args); \
135 DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \
136 } while(0)
137
138 #define MESSAGE(d_loglevel,d_string,d_args...)\
139 do { \
140 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \
141 DBF_EVENT(DBF_ALERT, d_string, d_args); \
142 } while(0)
143
144 /* messages to be written via klogd only */
145 #define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\
146 do { \
147 printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
148 dev_name(&d_device->cdev->dev), d_args); \
149 } while(0)
150
151 #define MESSAGE_LOG(d_loglevel,d_string,d_args...)\
152 do { \
153 printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \
154 } while(0)
155
156 /* Macro to calculate number of blocks per page */
157 #define BLOCKS_PER_PAGE(blksize) (PAGE_SIZE / blksize)
158
159 struct dasd_ccw_req {
160 unsigned int magic; /* Eye catcher */
161 int intrc; /* internal error, e.g. from start_IO */
162 struct list_head devlist; /* for dasd_device request queue */
163 struct list_head blocklist; /* for dasd_block request queue */
164 struct dasd_block *block; /* the originating block device */
165 struct dasd_device *memdev; /* the device used to allocate this */
166 struct dasd_device *startdev; /* device the request is started on */
167 struct dasd_device *basedev; /* base device if no block->base */
168 void *cpaddr; /* address of ccw or tcw */
169 short retries; /* A retry counter */
170 unsigned char cpmode; /* 0 = cmd mode, 1 = itcw */
171 char status; /* status of this request */
172 char lpm; /* logical path mask */
173 unsigned long flags; /* flags of this request */
174 struct dasd_queue *dq;
175 unsigned long starttime; /* jiffies time of request start */
176 unsigned long expires; /* expiration period in jiffies */
177 void *data; /* pointer to data area */
178 struct irb irb; /* device status in case of an error */
179 struct dasd_ccw_req *refers; /* ERP-chain queueing. */
180 void *function; /* originating ERP action */
181 void *mem_chunk;
182
183 unsigned long buildclk; /* TOD-clock of request generation */
184 unsigned long startclk; /* TOD-clock of request start */
185 unsigned long stopclk; /* TOD-clock of request interrupt */
186 unsigned long endclk; /* TOD-clock of request termination */
187
188 void (*callback)(struct dasd_ccw_req *, void *data);
189 void *callback_data;
190 unsigned int proc_bytes; /* bytes for partial completion */
191 };
192
193 /*
194 * dasd_ccw_req -> status can be:
195 */
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 */
202
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 */
209
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
215
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
223 */
224 /*
225 * The following flags are used to suppress output of certain errors.
226 */
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 */
231
232 #define DASD_REQ_PER_DEV 4
233
234 /* Signature for error recovery functions. */
235 typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *);
236
237 /*
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
240 * 1 Byte max.
241 */
242 #define DASD_CQR_MAX_CCW 255
243
244 /*
245 * Unique identifier for dasd device.
246 */
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
251
252 struct dasd_uid {
253 __u8 type;
254 char vendor[4];
255 char serial[15];
256 __u16 ssid;
257 __u8 real_unit_addr;
258 __u8 base_unit_addr;
259 char vduit[33];
260 };
261
262 /*
263 * the struct dasd_discipline is
264 * sth like a table of virtual functions, if you think of dasd_eckd
265 * inheriting dasd...
266 * no, currently we are not planning to reimplement the driver in C++
267 */
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 */
272
273 struct list_head list; /* used for list of disciplines */
274
275 /*
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.
281 */
282 int (*check_device) (struct dasd_device *);
283 void (*uncheck_device) (struct dasd_device *);
284
285 /*
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.
291 */
292 int (*do_analysis) (struct dasd_block *);
293
294 /*
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
298 * configuration.
299 */
300 int (*verify_path)(struct dasd_device *, __u8);
301
302 /*
303 * Last things to do when a device is set online, and first things
304 * when it is set offline.
305 */
306 int (*basic_to_ready) (struct dasd_device *);
307 int (*online_to_ready) (struct dasd_device *);
308 int (*basic_to_known)(struct dasd_device *);
309
310 /*
311 * Initialize block layer request queue.
312 */
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
321 * it for retry.
322 */
323 struct dasd_ccw_req *(*build_cp) (struct dasd_device *,
324 struct dasd_block *,
325 struct request *);
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 *);
334
335 /*
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
342 * to the console.
343 */
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 *,
347 struct irb *);
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 *,
351 struct irb *);
352
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 *);
357
358 /* suspend/resume functions */
359 int (*freeze) (struct dasd_device *);
360 int (*restore) (struct dasd_device *);
361
362 /* reload device after state change */
363 int (*reload) (struct dasd_device *);
364
365 int (*get_uid) (struct dasd_device *, struct dasd_uid *);
366 void (*kick_validate) (struct dasd_device *);
367 int (*check_attention)(struct dasd_device *, __u8);
368 int (*host_access_count)(struct dasd_device *);
369 int (*hosts_print)(struct dasd_device *, struct seq_file *);
370 void (*handle_hpf_error)(struct dasd_device *, struct irb *);
371 void (*disable_hpf)(struct dasd_device *);
372 int (*hpf_enabled)(struct dasd_device *);
373 void (*reset_path)(struct dasd_device *, __u8);
374
375 /*
376 * Extent Space Efficient (ESE) relevant functions
377 */
378 int (*is_ese)(struct dasd_device *);
379 /* Capacity */
380 int (*space_allocated)(struct dasd_device *);
381 int (*space_configured)(struct dasd_device *);
382 int (*logical_capacity)(struct dasd_device *);
383 int (*release_space)(struct dasd_device *, struct format_data_t *);
384 /* Extent Pool */
385 int (*ext_pool_id)(struct dasd_device *);
386 int (*ext_size)(struct dasd_device *);
387 int (*ext_pool_cap_at_warnlevel)(struct dasd_device *);
388 int (*ext_pool_warn_thrshld)(struct dasd_device *);
389 int (*ext_pool_oos)(struct dasd_device *);
390 int (*ext_pool_exhaust)(struct dasd_device *, struct dasd_ccw_req *);
391 struct dasd_ccw_req *(*ese_format)(struct dasd_device *,
392 struct dasd_ccw_req *, struct irb *);
393 int (*ese_read)(struct dasd_ccw_req *, struct irb *);
394 };
395
396 extern struct dasd_discipline *dasd_diag_discipline_pointer;
397
398 /*
399 * Notification numbers for extended error reporting notifications:
400 * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's
401 * eer pointer) is freed. The error reporting module needs to do all necessary
402 * cleanup steps.
403 * The DASD_EER_TRIGGER notification sends the actual error reports (triggers).
404 */
405 #define DASD_EER_DISABLE 0
406 #define DASD_EER_TRIGGER 1
407
408 /* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */
409 #define DASD_EER_FATALERROR 1
410 #define DASD_EER_NOPATH 2
411 #define DASD_EER_STATECHANGE 3
412 #define DASD_EER_PPRCSUSPEND 4
413 #define DASD_EER_NOSPC 5
414
415 /* DASD path handling */
416
417 #define DASD_PATH_OPERATIONAL 1
418 #define DASD_PATH_TBV 2
419 #define DASD_PATH_PP 3
420 #define DASD_PATH_NPP 4
421 #define DASD_PATH_MISCABLED 5
422 #define DASD_PATH_NOHPF 6
423 #define DASD_PATH_CUIR 7
424 #define DASD_PATH_IFCC 8
425
426 #define DASD_THRHLD_MAX 4294967295U
427 #define DASD_INTERVAL_MAX 4294967295U
428
429 struct dasd_path {
430 unsigned long flags;
431 u8 cssid;
432 u8 ssid;
433 u8 chpid;
434 struct dasd_conf_data *conf_data;
435 atomic_t error_count;
436 unsigned long errorclk;
437 };
438
439
440 struct dasd_profile_info {
441 /* legacy part of profile data, as in dasd_profile_info_t */
442 unsigned int dasd_io_reqs; /* number of requests processed */
443 unsigned int dasd_io_sects; /* number of sectors processed */
444 unsigned int dasd_io_secs[32]; /* histogram of request's sizes */
445 unsigned int dasd_io_times[32]; /* histogram of requests's times */
446 unsigned int dasd_io_timps[32]; /* h. of requests's times per sector */
447 unsigned int dasd_io_time1[32]; /* hist. of time from build to start */
448 unsigned int dasd_io_time2[32]; /* hist. of time from start to irq */
449 unsigned int dasd_io_time2ps[32]; /* hist. of time from start to irq */
450 unsigned int dasd_io_time3[32]; /* hist. of time from irq to end */
451 unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */
452
453 /* new data */
454 struct timespec64 starttod; /* time of start or last reset */
455 unsigned int dasd_io_alias; /* requests using an alias */
456 unsigned int dasd_io_tpm; /* requests using transport mode */
457 unsigned int dasd_read_reqs; /* total number of read requests */
458 unsigned int dasd_read_sects; /* total number read sectors */
459 unsigned int dasd_read_alias; /* read request using an alias */
460 unsigned int dasd_read_tpm; /* read requests in transport mode */
461 unsigned int dasd_read_secs[32]; /* histogram of request's sizes */
462 unsigned int dasd_read_times[32]; /* histogram of requests's times */
463 unsigned int dasd_read_time1[32]; /* hist. time from build to start */
464 unsigned int dasd_read_time2[32]; /* hist. of time from start to irq */
465 unsigned int dasd_read_time3[32]; /* hist. of time from irq to end */
466 unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */
467 unsigned long dasd_sum_times; /* sum of request times */
468 unsigned long dasd_sum_time_str; /* sum of time from build to start */
469 unsigned long dasd_sum_time_irq; /* sum of time from start to irq */
470 unsigned long dasd_sum_time_end; /* sum of time from irq to end */
471 };
472
473 struct dasd_profile {
474 struct dentry *dentry;
475 struct dasd_profile_info *data;
476 spinlock_t lock;
477 };
478
479 struct dasd_format_entry {
480 struct list_head list;
481 sector_t track;
482 };
483
484 struct dasd_device {
485 /* Block device stuff. */
486 struct dasd_block *block;
487
488 unsigned int devindex;
489 unsigned long flags; /* per device flags */
490 unsigned short features; /* copy of devmap-features (read-only!) */
491
492 /* extended error reporting stuff (eer) */
493 struct dasd_ccw_req *eer_cqr;
494
495 /* Device discipline stuff. */
496 struct dasd_discipline *discipline;
497 struct dasd_discipline *base_discipline;
498 void *private;
499 struct dasd_path path[8];
500 __u8 opm;
501
502 /* Device state and target state. */
503 int state, target;
504 struct mutex state_mutex;
505 int stopped; /* device (ccw_device_start) was stopped */
506
507 /* reference count. */
508 atomic_t ref_count;
509
510 /* ccw queue and memory for static ccw/erp buffers. */
511 struct list_head ccw_queue;
512 spinlock_t mem_lock;
513 void *ccw_mem;
514 void *erp_mem;
515 void *ese_mem;
516 struct list_head ccw_chunks;
517 struct list_head erp_chunks;
518 struct list_head ese_chunks;
519
520 atomic_t tasklet_scheduled;
521 struct tasklet_struct tasklet;
522 struct work_struct kick_work;
523 struct work_struct restore_device;
524 struct work_struct reload_device;
525 struct work_struct kick_validate;
526 struct work_struct suc_work;
527 struct work_struct requeue_requests;
528 struct timer_list timer;
529
530 debug_info_t *debug_area;
531
532 struct ccw_device *cdev;
533
534 /* hook for alias management */
535 struct list_head alias_list;
536
537 /* default expiration time in s */
538 unsigned long default_expires;
539 unsigned long default_retries;
540
541 unsigned long blk_timeout;
542
543 unsigned long path_thrhld;
544 unsigned long path_interval;
545
546 struct dentry *debugfs_dentry;
547 struct dentry *hosts_dentry;
548 struct dasd_profile profile;
549 struct dasd_format_entry format_entry;
550 };
551
552 struct dasd_block {
553 /* Block device stuff. */
554 struct gendisk *gdp;
555 struct request_queue *request_queue;
556 spinlock_t request_queue_lock;
557 struct blk_mq_tag_set tag_set;
558 struct block_device *bdev;
559 atomic_t open_count;
560
561 unsigned long blocks; /* size of volume in blocks */
562 unsigned int bp_block; /* bytes per block */
563 unsigned int s2b_shift; /* log2 (bp_block/512) */
564
565 struct dasd_device *base;
566 struct list_head ccw_queue;
567 spinlock_t queue_lock;
568
569 atomic_t tasklet_scheduled;
570 struct tasklet_struct tasklet;
571 struct timer_list timer;
572
573 struct dentry *debugfs_dentry;
574 struct dasd_profile profile;
575
576 struct list_head format_list;
577 spinlock_t format_lock;
578 };
579
580 struct dasd_attention_data {
581 struct dasd_device *device;
582 __u8 lpum;
583 };
584
585 struct dasd_queue {
586 spinlock_t lock;
587 };
588
589 /* reasons why device (ccw_device_start) was stopped */
590 #define DASD_STOPPED_NOT_ACC 1 /* not accessible */
591 #define DASD_STOPPED_QUIESCE 2 /* Quiesced */
592 #define DASD_STOPPED_PENDING 4 /* long busy */
593 #define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */
594 #define DASD_STOPPED_SU 16 /* summary unit check handling */
595 #define DASD_STOPPED_PM 32 /* pm state transition */
596 #define DASD_UNRESUMED_PM 64 /* pm resume failed state */
597 #define DASD_STOPPED_NOSPC 128 /* no space left */
598
599 /* per device flags */
600 #define DASD_FLAG_OFFLINE 3 /* device is in offline processing */
601 #define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */
602 #define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */
603 #define DASD_FLAG_DEVICE_RO 6 /* The device itself is read-only. Don't
604 * confuse this with the user specified
605 * read-only feature.
606 */
607 #define DASD_FLAG_IS_RESERVED 7 /* The device is reserved */
608 #define DASD_FLAG_LOCK_STOLEN 8 /* The device lock was stolen */
609 #define DASD_FLAG_SUSPENDED 9 /* The device was suspended */
610 #define DASD_FLAG_SAFE_OFFLINE 10 /* safe offline processing requested*/
611 #define DASD_FLAG_SAFE_OFFLINE_RUNNING 11 /* safe offline running */
612 #define DASD_FLAG_ABORTALL 12 /* Abort all noretry requests */
613 #define DASD_FLAG_PATH_VERIFY 13 /* Path verification worker running */
614 #define DASD_FLAG_SUC 14 /* unhandled summary unit check */
615
616 #define DASD_SLEEPON_START_TAG ((void *) 1)
617 #define DASD_SLEEPON_END_TAG ((void *) 2)
618
619 void dasd_put_device_wake(struct dasd_device *);
620
621 /*
622 * Reference count inliners
623 */
624 static inline void
dasd_get_device(struct dasd_device * device)625 dasd_get_device(struct dasd_device *device)
626 {
627 atomic_inc(&device->ref_count);
628 }
629
630 static inline void
dasd_put_device(struct dasd_device * device)631 dasd_put_device(struct dasd_device *device)
632 {
633 if (atomic_dec_return(&device->ref_count) == 0)
634 dasd_put_device_wake(device);
635 }
636
637 /*
638 * The static memory in ccw_mem and erp_mem is managed by a sorted
639 * list of free memory chunks.
640 */
641 struct dasd_mchunk
642 {
643 struct list_head list;
644 unsigned long size;
645 } __attribute__ ((aligned(8)));
646
647 static inline void
dasd_init_chunklist(struct list_head * chunk_list,void * mem,unsigned long size)648 dasd_init_chunklist(struct list_head *chunk_list, void *mem,
649 unsigned long size)
650 {
651 struct dasd_mchunk *chunk;
652
653 INIT_LIST_HEAD(chunk_list);
654 chunk = (struct dasd_mchunk *) mem;
655 chunk->size = size - sizeof(struct dasd_mchunk);
656 list_add(&chunk->list, chunk_list);
657 }
658
659 static inline void *
dasd_alloc_chunk(struct list_head * chunk_list,unsigned long size)660 dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size)
661 {
662 struct dasd_mchunk *chunk, *tmp;
663
664 size = (size + 7L) & -8L;
665 list_for_each_entry(chunk, chunk_list, list) {
666 if (chunk->size < size)
667 continue;
668 if (chunk->size > size + sizeof(struct dasd_mchunk)) {
669 char *endaddr = (char *) (chunk + 1) + chunk->size;
670 tmp = (struct dasd_mchunk *) (endaddr - size) - 1;
671 tmp->size = size;
672 chunk->size -= size + sizeof(struct dasd_mchunk);
673 chunk = tmp;
674 } else
675 list_del(&chunk->list);
676 return (void *) (chunk + 1);
677 }
678 return NULL;
679 }
680
681 static inline void
dasd_free_chunk(struct list_head * chunk_list,void * mem)682 dasd_free_chunk(struct list_head *chunk_list, void *mem)
683 {
684 struct dasd_mchunk *chunk, *tmp;
685 struct list_head *p, *left;
686
687 chunk = (struct dasd_mchunk *)
688 ((char *) mem - sizeof(struct dasd_mchunk));
689 /* Find out the left neighbour in chunk_list. */
690 left = chunk_list;
691 list_for_each(p, chunk_list) {
692 if (list_entry(p, struct dasd_mchunk, list) > chunk)
693 break;
694 left = p;
695 }
696 /* Try to merge with right neighbour = next element from left. */
697 if (left->next != chunk_list) {
698 tmp = list_entry(left->next, struct dasd_mchunk, list);
699 if ((char *) (chunk + 1) + chunk->size == (char *) tmp) {
700 list_del(&tmp->list);
701 chunk->size += tmp->size + sizeof(struct dasd_mchunk);
702 }
703 }
704 /* Try to merge with left neighbour. */
705 if (left != chunk_list) {
706 tmp = list_entry(left, struct dasd_mchunk, list);
707 if ((char *) (tmp + 1) + tmp->size == (char *) chunk) {
708 tmp->size += chunk->size + sizeof(struct dasd_mchunk);
709 return;
710 }
711 }
712 __list_add(&chunk->list, left, left->next);
713 }
714
715 /*
716 * Check if bsize is in { 512, 1024, 2048, 4096 }
717 */
718 static inline int
dasd_check_blocksize(int bsize)719 dasd_check_blocksize(int bsize)
720 {
721 if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize))
722 return -EMEDIUMTYPE;
723 return 0;
724 }
725
726 /* externals in dasd.c */
727 #define DASD_PROFILE_OFF 0
728 #define DASD_PROFILE_ON 1
729 #define DASD_PROFILE_GLOBAL_ONLY 2
730
731 extern debug_info_t *dasd_debug_area;
732 extern struct dasd_profile dasd_global_profile;
733 extern unsigned int dasd_global_profile_level;
734 extern const struct block_device_operations dasd_device_operations;
735
736 extern struct kmem_cache *dasd_page_cache;
737
738 struct dasd_ccw_req *
739 dasd_smalloc_request(int, int, int, struct dasd_device *, struct dasd_ccw_req *);
740 struct dasd_ccw_req *dasd_fmalloc_request(int, int, int, struct dasd_device *);
741 void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *);
742 void dasd_ffree_request(struct dasd_ccw_req *, struct dasd_device *);
743 void dasd_wakeup_cb(struct dasd_ccw_req *, void *);
744
745 struct dasd_device *dasd_alloc_device(void);
746 void dasd_free_device(struct dasd_device *);
747
748 struct dasd_block *dasd_alloc_block(void);
749 void dasd_free_block(struct dasd_block *);
750
751 enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved);
752
753 void dasd_enable_device(struct dasd_device *);
754 void dasd_set_target_state(struct dasd_device *, int);
755 void dasd_kick_device(struct dasd_device *);
756 void dasd_restore_device(struct dasd_device *);
757 void dasd_reload_device(struct dasd_device *);
758 void dasd_schedule_requeue(struct dasd_device *);
759
760 void dasd_add_request_head(struct dasd_ccw_req *);
761 void dasd_add_request_tail(struct dasd_ccw_req *);
762 int dasd_start_IO(struct dasd_ccw_req *);
763 int dasd_term_IO(struct dasd_ccw_req *);
764 void dasd_schedule_device_bh(struct dasd_device *);
765 void dasd_schedule_block_bh(struct dasd_block *);
766 int dasd_sleep_on(struct dasd_ccw_req *);
767 int dasd_sleep_on_queue(struct list_head *);
768 int dasd_sleep_on_immediatly(struct dasd_ccw_req *);
769 int dasd_sleep_on_queue_interruptible(struct list_head *);
770 int dasd_sleep_on_interruptible(struct dasd_ccw_req *);
771 void dasd_device_set_timer(struct dasd_device *, int);
772 void dasd_device_clear_timer(struct dasd_device *);
773 void dasd_block_set_timer(struct dasd_block *, int);
774 void dasd_block_clear_timer(struct dasd_block *);
775 int dasd_cancel_req(struct dasd_ccw_req *);
776 int dasd_flush_device_queue(struct dasd_device *);
777 int dasd_generic_probe (struct ccw_device *, struct dasd_discipline *);
778 void dasd_generic_free_discipline(struct dasd_device *);
779 void dasd_generic_remove (struct ccw_device *cdev);
780 int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *);
781 int dasd_generic_set_offline (struct ccw_device *cdev);
782 int dasd_generic_notify(struct ccw_device *, int);
783 int dasd_generic_last_path_gone(struct dasd_device *);
784 int dasd_generic_path_operational(struct dasd_device *);
785 void dasd_generic_shutdown(struct ccw_device *);
786
787 void dasd_generic_handle_state_change(struct dasd_device *);
788 int dasd_generic_pm_freeze(struct ccw_device *);
789 int dasd_generic_restore_device(struct ccw_device *);
790 enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *);
791 void dasd_generic_path_event(struct ccw_device *, int *);
792 int dasd_generic_verify_path(struct dasd_device *, __u8);
793 void dasd_generic_space_exhaust(struct dasd_device *, struct dasd_ccw_req *);
794 void dasd_generic_space_avail(struct dasd_device *);
795
796 int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int);
797 char *dasd_get_sense(struct irb *);
798
799 void dasd_device_set_stop_bits(struct dasd_device *, int);
800 void dasd_device_remove_stop_bits(struct dasd_device *, int);
801
802 int dasd_device_is_ro(struct dasd_device *);
803
804 void dasd_profile_reset(struct dasd_profile *);
805 int dasd_profile_on(struct dasd_profile *);
806 void dasd_profile_off(struct dasd_profile *);
807 char *dasd_get_user_string(const char __user *, size_t);
808
809 /* externals in dasd_devmap.c */
810 extern int dasd_max_devindex;
811 extern int dasd_probeonly;
812 extern int dasd_autodetect;
813 extern int dasd_nopav;
814 extern int dasd_nofcx;
815
816 int dasd_devmap_init(void);
817 void dasd_devmap_exit(void);
818
819 struct dasd_device *dasd_create_device(struct ccw_device *);
820 void dasd_delete_device(struct dasd_device *);
821
822 int dasd_get_feature(struct ccw_device *, int);
823 int dasd_set_feature(struct ccw_device *, int, int);
824
825 int dasd_add_sysfs_files(struct ccw_device *);
826 void dasd_remove_sysfs_files(struct ccw_device *);
827
828 struct dasd_device *dasd_device_from_cdev(struct ccw_device *);
829 struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *);
830 struct dasd_device *dasd_device_from_devindex(int);
831
832 void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *);
833 struct dasd_device *dasd_device_from_gendisk(struct gendisk *);
834
835 int dasd_parse(void) __init;
836 int dasd_busid_known(const char *);
837
838 /* externals in dasd_gendisk.c */
839 int dasd_gendisk_init(void);
840 void dasd_gendisk_exit(void);
841 int dasd_gendisk_alloc(struct dasd_block *);
842 void dasd_gendisk_free(struct dasd_block *);
843 int dasd_scan_partitions(struct dasd_block *);
844 void dasd_destroy_partitions(struct dasd_block *);
845
846 /* externals in dasd_ioctl.c */
847 int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long);
848
849 /* externals in dasd_proc.c */
850 int dasd_proc_init(void);
851 void dasd_proc_exit(void);
852
853 /* externals in dasd_erp.c */
854 struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *);
855 struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *);
856 struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int,
857 struct dasd_device *);
858 void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *);
859 void dasd_log_sense(struct dasd_ccw_req *, struct irb *);
860 void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb);
861
862 /* externals in dasd_3990_erp.c */
863 struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *);
864 void dasd_3990_erp_handle_sim(struct dasd_device *, char *);
865
866 /* externals in dasd_eer.c */
867 #ifdef CONFIG_DASD_EER
868 int dasd_eer_init(void);
869 void dasd_eer_exit(void);
870 int dasd_eer_enable(struct dasd_device *);
871 void dasd_eer_disable(struct dasd_device *);
872 void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr,
873 unsigned int id);
874 void dasd_eer_snss(struct dasd_device *);
875
dasd_eer_enabled(struct dasd_device * device)876 static inline int dasd_eer_enabled(struct dasd_device *device)
877 {
878 return device->eer_cqr != NULL;
879 }
880 #else
881 #define dasd_eer_init() (0)
882 #define dasd_eer_exit() do { } while (0)
883 #define dasd_eer_enable(d) (0)
884 #define dasd_eer_disable(d) do { } while (0)
885 #define dasd_eer_write(d,c,i) do { } while (0)
886 #define dasd_eer_snss(d) do { } while (0)
887 #define dasd_eer_enabled(d) (0)
888 #endif /* CONFIG_DASD_ERR */
889
890
891 /* DASD path handling functions */
892
893 /*
894 * helper functions to modify bit masks for a given channel path for a device
895 */
dasd_path_is_operational(struct dasd_device * device,int chp)896 static inline int dasd_path_is_operational(struct dasd_device *device, int chp)
897 {
898 return test_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags);
899 }
900
dasd_path_need_verify(struct dasd_device * device,int chp)901 static inline int dasd_path_need_verify(struct dasd_device *device, int chp)
902 {
903 return test_bit(DASD_PATH_TBV, &device->path[chp].flags);
904 }
905
dasd_path_verify(struct dasd_device * device,int chp)906 static inline void dasd_path_verify(struct dasd_device *device, int chp)
907 {
908 __set_bit(DASD_PATH_TBV, &device->path[chp].flags);
909 }
910
dasd_path_clear_verify(struct dasd_device * device,int chp)911 static inline void dasd_path_clear_verify(struct dasd_device *device, int chp)
912 {
913 __clear_bit(DASD_PATH_TBV, &device->path[chp].flags);
914 }
915
dasd_path_clear_all_verify(struct dasd_device * device)916 static inline void dasd_path_clear_all_verify(struct dasd_device *device)
917 {
918 int chp;
919
920 for (chp = 0; chp < 8; chp++)
921 dasd_path_clear_verify(device, chp);
922 }
923
dasd_path_operational(struct dasd_device * device,int chp)924 static inline void dasd_path_operational(struct dasd_device *device, int chp)
925 {
926 __set_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags);
927 device->opm |= (0x80 >> chp);
928 }
929
dasd_path_nonpreferred(struct dasd_device * device,int chp)930 static inline void dasd_path_nonpreferred(struct dasd_device *device, int chp)
931 {
932 __set_bit(DASD_PATH_NPP, &device->path[chp].flags);
933 }
934
dasd_path_is_nonpreferred(struct dasd_device * device,int chp)935 static inline int dasd_path_is_nonpreferred(struct dasd_device *device, int chp)
936 {
937 return test_bit(DASD_PATH_NPP, &device->path[chp].flags);
938 }
939
dasd_path_clear_nonpreferred(struct dasd_device * device,int chp)940 static inline void dasd_path_clear_nonpreferred(struct dasd_device *device,
941 int chp)
942 {
943 __clear_bit(DASD_PATH_NPP, &device->path[chp].flags);
944 }
945
dasd_path_preferred(struct dasd_device * device,int chp)946 static inline void dasd_path_preferred(struct dasd_device *device, int chp)
947 {
948 __set_bit(DASD_PATH_PP, &device->path[chp].flags);
949 }
950
dasd_path_is_preferred(struct dasd_device * device,int chp)951 static inline int dasd_path_is_preferred(struct dasd_device *device, int chp)
952 {
953 return test_bit(DASD_PATH_PP, &device->path[chp].flags);
954 }
955
dasd_path_clear_preferred(struct dasd_device * device,int chp)956 static inline void dasd_path_clear_preferred(struct dasd_device *device,
957 int chp)
958 {
959 __clear_bit(DASD_PATH_PP, &device->path[chp].flags);
960 }
961
dasd_path_clear_oper(struct dasd_device * device,int chp)962 static inline void dasd_path_clear_oper(struct dasd_device *device, int chp)
963 {
964 __clear_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags);
965 device->opm &= ~(0x80 >> chp);
966 }
967
dasd_path_clear_cable(struct dasd_device * device,int chp)968 static inline void dasd_path_clear_cable(struct dasd_device *device, int chp)
969 {
970 __clear_bit(DASD_PATH_MISCABLED, &device->path[chp].flags);
971 }
972
dasd_path_cuir(struct dasd_device * device,int chp)973 static inline void dasd_path_cuir(struct dasd_device *device, int chp)
974 {
975 __set_bit(DASD_PATH_CUIR, &device->path[chp].flags);
976 }
977
dasd_path_is_cuir(struct dasd_device * device,int chp)978 static inline int dasd_path_is_cuir(struct dasd_device *device, int chp)
979 {
980 return test_bit(DASD_PATH_CUIR, &device->path[chp].flags);
981 }
982
dasd_path_clear_cuir(struct dasd_device * device,int chp)983 static inline void dasd_path_clear_cuir(struct dasd_device *device, int chp)
984 {
985 __clear_bit(DASD_PATH_CUIR, &device->path[chp].flags);
986 }
987
dasd_path_ifcc(struct dasd_device * device,int chp)988 static inline void dasd_path_ifcc(struct dasd_device *device, int chp)
989 {
990 set_bit(DASD_PATH_IFCC, &device->path[chp].flags);
991 }
992
dasd_path_is_ifcc(struct dasd_device * device,int chp)993 static inline int dasd_path_is_ifcc(struct dasd_device *device, int chp)
994 {
995 return test_bit(DASD_PATH_IFCC, &device->path[chp].flags);
996 }
997
dasd_path_clear_ifcc(struct dasd_device * device,int chp)998 static inline void dasd_path_clear_ifcc(struct dasd_device *device, int chp)
999 {
1000 clear_bit(DASD_PATH_IFCC, &device->path[chp].flags);
1001 }
1002
dasd_path_clear_nohpf(struct dasd_device * device,int chp)1003 static inline void dasd_path_clear_nohpf(struct dasd_device *device, int chp)
1004 {
1005 __clear_bit(DASD_PATH_NOHPF, &device->path[chp].flags);
1006 }
1007
dasd_path_miscabled(struct dasd_device * device,int chp)1008 static inline void dasd_path_miscabled(struct dasd_device *device, int chp)
1009 {
1010 __set_bit(DASD_PATH_MISCABLED, &device->path[chp].flags);
1011 }
1012
dasd_path_is_miscabled(struct dasd_device * device,int chp)1013 static inline int dasd_path_is_miscabled(struct dasd_device *device, int chp)
1014 {
1015 return test_bit(DASD_PATH_MISCABLED, &device->path[chp].flags);
1016 }
1017
dasd_path_nohpf(struct dasd_device * device,int chp)1018 static inline void dasd_path_nohpf(struct dasd_device *device, int chp)
1019 {
1020 __set_bit(DASD_PATH_NOHPF, &device->path[chp].flags);
1021 }
1022
dasd_path_is_nohpf(struct dasd_device * device,int chp)1023 static inline int dasd_path_is_nohpf(struct dasd_device *device, int chp)
1024 {
1025 return test_bit(DASD_PATH_NOHPF, &device->path[chp].flags);
1026 }
1027
1028 /*
1029 * get functions for path masks
1030 * will return a path masks for the given device
1031 */
1032
dasd_path_get_opm(struct dasd_device * device)1033 static inline __u8 dasd_path_get_opm(struct dasd_device *device)
1034 {
1035 return device->opm;
1036 }
1037
dasd_path_get_tbvpm(struct dasd_device * device)1038 static inline __u8 dasd_path_get_tbvpm(struct dasd_device *device)
1039 {
1040 int chp;
1041 __u8 tbvpm = 0x00;
1042
1043 for (chp = 0; chp < 8; chp++)
1044 if (dasd_path_need_verify(device, chp))
1045 tbvpm |= 0x80 >> chp;
1046 return tbvpm;
1047 }
1048
dasd_path_get_nppm(struct dasd_device * device)1049 static inline __u8 dasd_path_get_nppm(struct dasd_device *device)
1050 {
1051 int chp;
1052 __u8 npm = 0x00;
1053
1054 for (chp = 0; chp < 8; chp++) {
1055 if (dasd_path_is_nonpreferred(device, chp))
1056 npm |= 0x80 >> chp;
1057 }
1058 return npm;
1059 }
1060
dasd_path_get_ppm(struct dasd_device * device)1061 static inline __u8 dasd_path_get_ppm(struct dasd_device *device)
1062 {
1063 int chp;
1064 __u8 ppm = 0x00;
1065
1066 for (chp = 0; chp < 8; chp++)
1067 if (dasd_path_is_preferred(device, chp))
1068 ppm |= 0x80 >> chp;
1069 return ppm;
1070 }
1071
dasd_path_get_cablepm(struct dasd_device * device)1072 static inline __u8 dasd_path_get_cablepm(struct dasd_device *device)
1073 {
1074 int chp;
1075 __u8 cablepm = 0x00;
1076
1077 for (chp = 0; chp < 8; chp++)
1078 if (dasd_path_is_miscabled(device, chp))
1079 cablepm |= 0x80 >> chp;
1080 return cablepm;
1081 }
1082
dasd_path_get_cuirpm(struct dasd_device * device)1083 static inline __u8 dasd_path_get_cuirpm(struct dasd_device *device)
1084 {
1085 int chp;
1086 __u8 cuirpm = 0x00;
1087
1088 for (chp = 0; chp < 8; chp++)
1089 if (dasd_path_is_cuir(device, chp))
1090 cuirpm |= 0x80 >> chp;
1091 return cuirpm;
1092 }
1093
dasd_path_get_ifccpm(struct dasd_device * device)1094 static inline __u8 dasd_path_get_ifccpm(struct dasd_device *device)
1095 {
1096 int chp;
1097 __u8 ifccpm = 0x00;
1098
1099 for (chp = 0; chp < 8; chp++)
1100 if (dasd_path_is_ifcc(device, chp))
1101 ifccpm |= 0x80 >> chp;
1102 return ifccpm;
1103 }
1104
dasd_path_get_hpfpm(struct dasd_device * device)1105 static inline __u8 dasd_path_get_hpfpm(struct dasd_device *device)
1106 {
1107 int chp;
1108 __u8 hpfpm = 0x00;
1109
1110 for (chp = 0; chp < 8; chp++)
1111 if (dasd_path_is_nohpf(device, chp))
1112 hpfpm |= 0x80 >> chp;
1113 return hpfpm;
1114 }
1115
1116 /*
1117 * add functions for path masks
1118 * the existing path mask will be extended by the given path mask
1119 */
dasd_path_add_tbvpm(struct dasd_device * device,__u8 pm)1120 static inline void dasd_path_add_tbvpm(struct dasd_device *device, __u8 pm)
1121 {
1122 int chp;
1123
1124 for (chp = 0; chp < 8; chp++)
1125 if (pm & (0x80 >> chp))
1126 dasd_path_verify(device, chp);
1127 }
1128
dasd_path_get_notoperpm(struct dasd_device * device)1129 static inline __u8 dasd_path_get_notoperpm(struct dasd_device *device)
1130 {
1131 int chp;
1132 __u8 nopm = 0x00;
1133
1134 for (chp = 0; chp < 8; chp++)
1135 if (dasd_path_is_nohpf(device, chp) ||
1136 dasd_path_is_ifcc(device, chp) ||
1137 dasd_path_is_cuir(device, chp) ||
1138 dasd_path_is_miscabled(device, chp))
1139 nopm |= 0x80 >> chp;
1140 return nopm;
1141 }
1142
dasd_path_add_opm(struct dasd_device * device,__u8 pm)1143 static inline void dasd_path_add_opm(struct dasd_device *device, __u8 pm)
1144 {
1145 int chp;
1146
1147 for (chp = 0; chp < 8; chp++)
1148 if (pm & (0x80 >> chp)) {
1149 dasd_path_operational(device, chp);
1150 /*
1151 * if the path is used
1152 * it should not be in one of the negative lists
1153 */
1154 dasd_path_clear_nohpf(device, chp);
1155 dasd_path_clear_cuir(device, chp);
1156 dasd_path_clear_cable(device, chp);
1157 dasd_path_clear_ifcc(device, chp);
1158 }
1159 }
1160
dasd_path_add_cablepm(struct dasd_device * device,__u8 pm)1161 static inline void dasd_path_add_cablepm(struct dasd_device *device, __u8 pm)
1162 {
1163 int chp;
1164
1165 for (chp = 0; chp < 8; chp++)
1166 if (pm & (0x80 >> chp))
1167 dasd_path_miscabled(device, chp);
1168 }
1169
dasd_path_add_cuirpm(struct dasd_device * device,__u8 pm)1170 static inline void dasd_path_add_cuirpm(struct dasd_device *device, __u8 pm)
1171 {
1172 int chp;
1173
1174 for (chp = 0; chp < 8; chp++)
1175 if (pm & (0x80 >> chp))
1176 dasd_path_cuir(device, chp);
1177 }
1178
dasd_path_add_ifccpm(struct dasd_device * device,__u8 pm)1179 static inline void dasd_path_add_ifccpm(struct dasd_device *device, __u8 pm)
1180 {
1181 int chp;
1182
1183 for (chp = 0; chp < 8; chp++)
1184 if (pm & (0x80 >> chp))
1185 dasd_path_ifcc(device, chp);
1186 }
1187
dasd_path_add_nppm(struct dasd_device * device,__u8 pm)1188 static inline void dasd_path_add_nppm(struct dasd_device *device, __u8 pm)
1189 {
1190 int chp;
1191
1192 for (chp = 0; chp < 8; chp++)
1193 if (pm & (0x80 >> chp))
1194 dasd_path_nonpreferred(device, chp);
1195 }
1196
dasd_path_add_nohpfpm(struct dasd_device * device,__u8 pm)1197 static inline void dasd_path_add_nohpfpm(struct dasd_device *device, __u8 pm)
1198 {
1199 int chp;
1200
1201 for (chp = 0; chp < 8; chp++)
1202 if (pm & (0x80 >> chp))
1203 dasd_path_nohpf(device, chp);
1204 }
1205
dasd_path_add_ppm(struct dasd_device * device,__u8 pm)1206 static inline void dasd_path_add_ppm(struct dasd_device *device, __u8 pm)
1207 {
1208 int chp;
1209
1210 for (chp = 0; chp < 8; chp++)
1211 if (pm & (0x80 >> chp))
1212 dasd_path_preferred(device, chp);
1213 }
1214
1215 /*
1216 * set functions for path masks
1217 * the existing path mask will be replaced by the given path mask
1218 */
dasd_path_set_tbvpm(struct dasd_device * device,__u8 pm)1219 static inline void dasd_path_set_tbvpm(struct dasd_device *device, __u8 pm)
1220 {
1221 int chp;
1222
1223 for (chp = 0; chp < 8; chp++)
1224 if (pm & (0x80 >> chp))
1225 dasd_path_verify(device, chp);
1226 else
1227 dasd_path_clear_verify(device, chp);
1228 }
1229
dasd_path_set_opm(struct dasd_device * device,__u8 pm)1230 static inline void dasd_path_set_opm(struct dasd_device *device, __u8 pm)
1231 {
1232 int chp;
1233
1234 for (chp = 0; chp < 8; chp++) {
1235 dasd_path_clear_oper(device, chp);
1236 if (pm & (0x80 >> chp)) {
1237 dasd_path_operational(device, chp);
1238 /*
1239 * if the path is used
1240 * it should not be in one of the negative lists
1241 */
1242 dasd_path_clear_nohpf(device, chp);
1243 dasd_path_clear_cuir(device, chp);
1244 dasd_path_clear_cable(device, chp);
1245 dasd_path_clear_ifcc(device, chp);
1246 }
1247 }
1248 }
1249
1250 /*
1251 * remove functions for path masks
1252 * the existing path mask will be cleared with the given path mask
1253 */
dasd_path_remove_opm(struct dasd_device * device,__u8 pm)1254 static inline void dasd_path_remove_opm(struct dasd_device *device, __u8 pm)
1255 {
1256 int chp;
1257
1258 for (chp = 0; chp < 8; chp++) {
1259 if (pm & (0x80 >> chp))
1260 dasd_path_clear_oper(device, chp);
1261 }
1262 }
1263
1264 /*
1265 * add the newly available path to the to be verified pm and remove it from
1266 * normal operation until it is verified
1267 */
dasd_path_available(struct dasd_device * device,int chp)1268 static inline void dasd_path_available(struct dasd_device *device, int chp)
1269 {
1270 dasd_path_clear_oper(device, chp);
1271 dasd_path_verify(device, chp);
1272 }
1273
dasd_path_notoper(struct dasd_device * device,int chp)1274 static inline void dasd_path_notoper(struct dasd_device *device, int chp)
1275 {
1276 dasd_path_clear_oper(device, chp);
1277 dasd_path_clear_preferred(device, chp);
1278 dasd_path_clear_nonpreferred(device, chp);
1279 }
1280
1281 /*
1282 * remove all paths from normal operation
1283 */
dasd_path_no_path(struct dasd_device * device)1284 static inline void dasd_path_no_path(struct dasd_device *device)
1285 {
1286 int chp;
1287
1288 for (chp = 0; chp < 8; chp++)
1289 dasd_path_notoper(device, chp);
1290
1291 dasd_path_clear_all_verify(device);
1292 }
1293
1294 /* end - path handling */
1295
1296 #endif /* DASD_H */
1297