Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
138c014d | 2 | /* |
1da177e4 | 3 | * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> |
138c014d | 4 | * Horst Hummel <Horst.Hummel@de.ibm.com> |
1da177e4 LT |
5 | * Martin Schwidefsky <schwidefsky@de.ibm.com> |
6 | * Bugreports.to..: <Linux390@de.ibm.com> | |
d41dd122 | 7 | * Copyright IBM Corp. 1999, 2009 |
1da177e4 LT |
8 | */ |
9 | ||
10 | #ifndef DASD_INT_H | |
11 | #define DASD_INT_H | |
12 | ||
1da177e4 LT |
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. | |
90f0094d | 22 | * unfmt: the device could not be analyzed (format is unknown). |
1da177e4 LT |
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 | |
90f0094d HH |
43 | #define DASD_STATE_UNFMT 3 |
44 | #define DASD_STATE_READY 4 | |
45 | #define DASD_STATE_ONLINE 5 | |
1da177e4 LT |
46 | |
47 | #include <linux/module.h> | |
48 | #include <linux/wait.h> | |
49 | #include <linux/blkdev.h> | |
1da177e4 LT |
50 | #include <linux/genhd.h> |
51 | #include <linux/hdreg.h> | |
52 | #include <linux/interrupt.h> | |
e108cebb | 53 | #include <linux/log2.h> |
1da177e4 LT |
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> | |
c9346151 | 59 | #include <linux/bitops.h> |
e443343e | 60 | #include <linux/blk-mq.h> |
1da177e4 | 61 | |
68b781fe SH |
62 | /* DASD discipline magic */ |
63 | #define DASD_ECKD_MAGIC 0xC5C3D2C4 | |
64 | #define DASD_DIAG_MAGIC 0xC4C9C1C7 | |
65 | #define DASD_FBA_MAGIC 0xC6C2C140 | |
66 | ||
1da177e4 LT |
67 | /* |
68 | * SECTION: Type definitions | |
69 | */ | |
70 | struct dasd_device; | |
8e09f215 | 71 | struct dasd_block; |
1da177e4 LT |
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 | ||
f60c768c SH |
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 | ||
2dedf0d9 SH |
84 | /* lock class for nested cdev lock */ |
85 | #define CDEV_NESTED_FIRST 1 | |
86 | #define CDEV_NESTED_SECOND 2 | |
87 | ||
1da177e4 LT |
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 | ||
1da177e4 LT |
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 | ||
b8ed5dd5 SH |
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 | ||
fc19f381 SH |
117 | /* limit size for an errorstring */ |
118 | #define ERRORLENGTH 30 | |
119 | ||
1da177e4 LT |
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", \ | |
2a0217d5 | 134 | dev_name(&d_device->cdev->dev), d_args); \ |
1da177e4 LT |
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", \ | |
2a0217d5 | 148 | dev_name(&d_device->cdev->dev), d_args); \ |
1da177e4 LT |
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 | ||
28b841b3 JH |
156 | /* Macro to calculate number of blocks per page */ |
157 | #define BLOCKS_PER_PAGE(blksize) (PAGE_SIZE / blksize) | |
158 | ||
1da177e4 LT |
159 | struct dasd_ccw_req { |
160 | unsigned int magic; /* Eye catcher */ | |
61d38832 | 161 | int intrc; /* internal error, e.g. from start_IO */ |
8e09f215 SW |
162 | struct list_head devlist; /* for dasd_device request queue */ |
163 | struct list_head blocklist; /* for dasd_block request queue */ | |
8e09f215 SW |
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 */ | |
29b8dd9d | 167 | struct dasd_device *basedev; /* base device if no block->base */ |
f3eb5384 | 168 | void *cpaddr; /* address of ccw or tcw */ |
61d38832 | 169 | short retries; /* A retry counter */ |
f3eb5384 | 170 | unsigned char cpmode; /* 0 = cmd mode, 1 = itcw */ |
8e09f215 | 171 | char status; /* status of this request */ |
61d38832 | 172 | char lpm; /* logical path mask */ |
1da177e4 | 173 | unsigned long flags; /* flags of this request */ |
e443343e | 174 | struct dasd_queue *dq; |
1da177e4 | 175 | unsigned long starttime; /* jiffies time of request start */ |
7c8faa86 | 176 | unsigned long expires; /* expiration period in jiffies */ |
1da177e4 | 177 | void *data; /* pointer to data area */ |
1da177e4 LT |
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 */ | |
c5205f2f | 181 | void *mem_chunk; |
1da177e4 | 182 | |
7bf76f01 JH |
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 */ | |
1da177e4 | 187 | |
8e09f215 SW |
188 | void (*callback)(struct dasd_ccw_req *, void *data); |
189 | void *callback_data; | |
5e6bdd37 | 190 | unsigned int proc_bytes; /* bytes for partial completion */ |
1da177e4 LT |
191 | }; |
192 | ||
138c014d | 193 | /* |
1da177e4 LT |
194 | * dasd_ccw_req -> status can be: |
195 | */ | |
8e09f215 SW |
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 */ | |
73ac36ea | 208 | #define DASD_CQR_SUCCESS 0x85 /* request was successful */ |
8e09f215 | 209 | |
7c8faa86 SH |
210 | /* default expiration time*/ |
211 | #define DASD_EXPIRES 300 | |
212 | #define DASD_EXPIRES_MAX 40000000 | |
1f1ee9ad HR |
213 | #define DASD_RETRIES 256 |
214 | #define DASD_RETRIES_MAX 32768 | |
1da177e4 LT |
215 | |
216 | /* per dasd_ccw_req flags */ | |
217 | #define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */ | |
1c01b8a5 | 218 | #define DASD_CQR_FLAGS_FAILFAST 1 /* FAILFAST */ |
a4d26c6a | 219 | #define DASD_CQR_VERIFY_PATH 2 /* path verification request */ |
5a27e60d SW |
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 | */ | |
8fd57520 JH |
224 | /* |
225 | * The following flags are used to suppress output of certain errors. | |
8fd57520 JH |
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 */ | |
ab24fbd3 | 230 | #define DASD_CQR_SUPPRESS_CR 7 /* Suppress 'Command Reject' error */ |
1da177e4 | 231 | |
e443343e SH |
232 | #define DASD_REQ_PER_DEV 4 |
233 | ||
1da177e4 LT |
234 | /* Signature for error recovery functions. */ |
235 | typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *); | |
236 | ||
46d1c03c JH |
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 | ||
2dedf0d9 SH |
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 | ||
1da177e4 LT |
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 */ | |
1da177e4 LT |
272 | |
273 | struct list_head list; /* used for list of disciplines */ | |
274 | ||
8e09f215 SW |
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 | ||
a4d26c6a SW |
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); | |
b7294932 | 301 | int (*pe_handler)(struct dasd_device *, __u8); |
a4d26c6a | 302 | |
8e09f215 SW |
303 | /* |
304 | * Last things to do when a device is set online, and first things | |
305 | * when it is set offline. | |
306 | */ | |
d42e1712 | 307 | int (*basic_to_ready) (struct dasd_device *); |
8e09f215 | 308 | int (*online_to_ready) (struct dasd_device *); |
daa991bf | 309 | int (*basic_to_known)(struct dasd_device *); |
8e09f215 | 310 | |
a0610a8a JH |
311 | /* |
312 | * Initialize block layer request queue. | |
313 | */ | |
314 | void (*setup_blk_queue)(struct dasd_block *); | |
d42e1712 | 315 | /* (struct dasd_device *); |
8e09f215 SW |
316 | * Device operation functions. build_cp creates a ccw chain for |
317 | * a block device request, start_io starts the request and | |
318 | * term_IO cancels it (e.g. in case of a timeout). format_device | |
8fd57520 JH |
319 | * formats the device and check_device_format compares the format of |
320 | * a device with the expected format_data. | |
8e09f215 SW |
321 | * handle_terminated_request allows to examine a cqr and prepare |
322 | * it for retry. | |
323 | */ | |
1da177e4 | 324 | struct dasd_ccw_req *(*build_cp) (struct dasd_device *, |
8e09f215 | 325 | struct dasd_block *, |
1da177e4 LT |
326 | struct request *); |
327 | int (*start_IO) (struct dasd_ccw_req *); | |
328 | int (*term_IO) (struct dasd_ccw_req *); | |
8e09f215 | 329 | void (*handle_terminated_request) (struct dasd_ccw_req *); |
d42e1712 | 330 | int (*format_device) (struct dasd_device *, |
8fd57520 JH |
331 | struct format_data_t *, int); |
332 | int (*check_device_format)(struct dasd_device *, | |
333 | struct format_check_t *, int); | |
1da177e4 | 334 | int (*free_cp) (struct dasd_ccw_req *, struct request *); |
8e09f215 SW |
335 | |
336 | /* | |
337 | * Error recovery functions. examine_error() returns a value that | |
338 | * indicates what to do for an error condition. If examine_error() | |
138c014d | 339 | * returns 'dasd_era_recover' erp_action() is called to create a |
8e09f215 SW |
340 | * special error recovery ccw. erp_postaction() is called after |
341 | * an error recovery ccw has finished its execution. dump_sense | |
342 | * is called for every error condition to print the sense data | |
343 | * to the console. | |
344 | */ | |
1da177e4 LT |
345 | dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *); |
346 | dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *); | |
347 | void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *, | |
348 | struct irb *); | |
aeec92ca | 349 | void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *); |
5a27e60d SW |
350 | void (*check_for_device_change) (struct dasd_device *, |
351 | struct dasd_ccw_req *, | |
352 | struct irb *); | |
8e09f215 | 353 | |
1da177e4 | 354 | /* i/o control functions. */ |
8e09f215 | 355 | int (*fill_geometry) (struct dasd_block *, struct hd_geometry *); |
1da177e4 | 356 | int (*fill_info) (struct dasd_device *, struct dasd_information2_t *); |
8e09f215 | 357 | int (*ioctl) (struct dasd_block *, unsigned int, void __user *); |
d41dd122 SH |
358 | |
359 | /* suspend/resume functions */ | |
360 | int (*freeze) (struct dasd_device *); | |
361 | int (*restore) (struct dasd_device *); | |
501183f2 SH |
362 | |
363 | /* reload device after state change */ | |
364 | int (*reload) (struct dasd_device *); | |
2dedf0d9 SH |
365 | |
366 | int (*get_uid) (struct dasd_device *, struct dasd_uid *); | |
f1633031 | 367 | void (*kick_validate) (struct dasd_device *); |
5db8440c | 368 | int (*check_attention)(struct dasd_device *, __u8); |
5a3b7b11 SH |
369 | int (*host_access_count)(struct dasd_device *); |
370 | int (*hosts_print)(struct dasd_device *, struct seq_file *); | |
a521b048 SH |
371 | void (*handle_hpf_error)(struct dasd_device *, struct irb *); |
372 | void (*disable_hpf)(struct dasd_device *); | |
373 | int (*hpf_enabled)(struct dasd_device *); | |
374 | void (*reset_path)(struct dasd_device *, __u8); | |
c729696b JH |
375 | |
376 | /* | |
377 | * Extent Space Efficient (ESE) relevant functions | |
378 | */ | |
379 | int (*is_ese)(struct dasd_device *); | |
380 | /* Capacity */ | |
381 | int (*space_allocated)(struct dasd_device *); | |
382 | int (*space_configured)(struct dasd_device *); | |
383 | int (*logical_capacity)(struct dasd_device *); | |
91dc4a19 | 384 | int (*release_space)(struct dasd_device *, struct format_data_t *); |
c729696b JH |
385 | /* Extent Pool */ |
386 | int (*ext_pool_id)(struct dasd_device *); | |
387 | int (*ext_size)(struct dasd_device *); | |
388 | int (*ext_pool_cap_at_warnlevel)(struct dasd_device *); | |
389 | int (*ext_pool_warn_thrshld)(struct dasd_device *); | |
390 | int (*ext_pool_oos)(struct dasd_device *); | |
9e12e54c | 391 | int (*ext_pool_exhaust)(struct dasd_device *, struct dasd_ccw_req *); |
5e6bdd37 SH |
392 | struct dasd_ccw_req *(*ese_format)(struct dasd_device *, |
393 | struct dasd_ccw_req *, struct irb *); | |
394 | int (*ese_read)(struct dasd_ccw_req *, struct irb *); | |
1da177e4 LT |
395 | }; |
396 | ||
397 | extern struct dasd_discipline *dasd_diag_discipline_pointer; | |
398 | ||
20c64468 SW |
399 | /* |
400 | * Notification numbers for extended error reporting notifications: | |
401 | * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's | |
402 | * eer pointer) is freed. The error reporting module needs to do all necessary | |
403 | * cleanup steps. | |
404 | * The DASD_EER_TRIGGER notification sends the actual error reports (triggers). | |
405 | */ | |
406 | #define DASD_EER_DISABLE 0 | |
407 | #define DASD_EER_TRIGGER 1 | |
408 | ||
409 | /* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */ | |
410 | #define DASD_EER_FATALERROR 1 | |
411 | #define DASD_EER_NOPATH 2 | |
412 | #define DASD_EER_STATECHANGE 3 | |
413 | #define DASD_EER_PPRCSUSPEND 4 | |
9e12e54c | 414 | #define DASD_EER_NOSPC 5 |
20c64468 | 415 | |
c9346151 SH |
416 | /* DASD path handling */ |
417 | ||
418 | #define DASD_PATH_OPERATIONAL 1 | |
419 | #define DASD_PATH_TBV 2 | |
420 | #define DASD_PATH_PP 3 | |
421 | #define DASD_PATH_NPP 4 | |
422 | #define DASD_PATH_MISCABLED 5 | |
423 | #define DASD_PATH_NOHPF 6 | |
424 | #define DASD_PATH_CUIR 7 | |
a521b048 | 425 | #define DASD_PATH_IFCC 8 |
c9346151 | 426 | |
a521b048 SH |
427 | #define DASD_THRHLD_MAX 4294967295U |
428 | #define DASD_INTERVAL_MAX 4294967295U | |
c9346151 | 429 | |
19508b20 JH |
430 | /* FC Endpoint Security Capabilities */ |
431 | #define DASD_FC_SECURITY_UNSUP 0 | |
432 | #define DASD_FC_SECURITY_AUTH 1 | |
433 | #define DASD_FC_SECURITY_ENC_FCSP2 2 | |
434 | #define DASD_FC_SECURITY_ENC_ERAS 3 | |
435 | ||
436 | #define DASD_FC_SECURITY_ENC_STR "Encryption" | |
437 | static const struct { | |
438 | u8 value; | |
439 | char *name; | |
440 | } dasd_path_fcs_mnemonics[] = { | |
441 | { DASD_FC_SECURITY_UNSUP, "Unsupported" }, | |
442 | { DASD_FC_SECURITY_AUTH, "Authentication" }, | |
443 | { DASD_FC_SECURITY_ENC_FCSP2, DASD_FC_SECURITY_ENC_STR }, | |
444 | { DASD_FC_SECURITY_ENC_ERAS, DASD_FC_SECURITY_ENC_STR }, | |
445 | }; | |
446 | ||
447 | static inline char *dasd_path_get_fcs_str(int val) | |
448 | { | |
449 | int i; | |
450 | ||
451 | for (i = 0; i < ARRAY_SIZE(dasd_path_fcs_mnemonics); i++) { | |
452 | if (dasd_path_fcs_mnemonics[i].value == val) | |
453 | return dasd_path_fcs_mnemonics[i].name; | |
454 | } | |
455 | ||
456 | return dasd_path_fcs_mnemonics[0].name; | |
457 | } | |
458 | ||
a4d26c6a | 459 | struct dasd_path { |
c9346151 | 460 | unsigned long flags; |
a521b048 SH |
461 | u8 cssid; |
462 | u8 ssid; | |
463 | u8 chpid; | |
c9346151 | 464 | struct dasd_conf_data *conf_data; |
a521b048 | 465 | atomic_t error_count; |
7bf76f01 | 466 | unsigned long errorclk; |
19508b20 JH |
467 | u8 fc_security; |
468 | struct kobject kobj; | |
469 | bool in_sysfs; | |
a4d26c6a SW |
470 | }; |
471 | ||
19508b20 JH |
472 | #define to_dasd_path(path) container_of(path, struct dasd_path, kobj) |
473 | ||
474 | static inline void dasd_path_release(struct kobject *kobj) | |
475 | { | |
476 | /* Memory for the dasd_path kobject is freed when dasd_free_device() is called */ | |
477 | } | |
478 | ||
c9346151 | 479 | |
4fa52aa7 SW |
480 | struct dasd_profile_info { |
481 | /* legacy part of profile data, as in dasd_profile_info_t */ | |
482 | unsigned int dasd_io_reqs; /* number of requests processed */ | |
483 | unsigned int dasd_io_sects; /* number of sectors processed */ | |
484 | unsigned int dasd_io_secs[32]; /* histogram of request's sizes */ | |
485 | unsigned int dasd_io_times[32]; /* histogram of requests's times */ | |
486 | unsigned int dasd_io_timps[32]; /* h. of requests's times per sector */ | |
487 | unsigned int dasd_io_time1[32]; /* hist. of time from build to start */ | |
488 | unsigned int dasd_io_time2[32]; /* hist. of time from start to irq */ | |
489 | unsigned int dasd_io_time2ps[32]; /* hist. of time from start to irq */ | |
490 | unsigned int dasd_io_time3[32]; /* hist. of time from irq to end */ | |
491 | unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */ | |
492 | ||
493 | /* new data */ | |
bd7a9b37 | 494 | struct timespec64 starttod; /* time of start or last reset */ |
4fa52aa7 SW |
495 | unsigned int dasd_io_alias; /* requests using an alias */ |
496 | unsigned int dasd_io_tpm; /* requests using transport mode */ | |
497 | unsigned int dasd_read_reqs; /* total number of read requests */ | |
498 | unsigned int dasd_read_sects; /* total number read sectors */ | |
499 | unsigned int dasd_read_alias; /* read request using an alias */ | |
500 | unsigned int dasd_read_tpm; /* read requests in transport mode */ | |
501 | unsigned int dasd_read_secs[32]; /* histogram of request's sizes */ | |
502 | unsigned int dasd_read_times[32]; /* histogram of requests's times */ | |
503 | unsigned int dasd_read_time1[32]; /* hist. time from build to start */ | |
504 | unsigned int dasd_read_time2[32]; /* hist. of time from start to irq */ | |
505 | unsigned int dasd_read_time3[32]; /* hist. of time from irq to end */ | |
506 | unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */ | |
d2907225 SH |
507 | unsigned long dasd_sum_times; /* sum of request times */ |
508 | unsigned long dasd_sum_time_str; /* sum of time from build to start */ | |
509 | unsigned long dasd_sum_time_irq; /* sum of time from start to irq */ | |
510 | unsigned long dasd_sum_time_end; /* sum of time from irq to end */ | |
4fa52aa7 SW |
511 | }; |
512 | ||
513 | struct dasd_profile { | |
514 | struct dentry *dentry; | |
515 | struct dasd_profile_info *data; | |
516 | spinlock_t lock; | |
517 | }; | |
518 | ||
5e6bdd37 SH |
519 | struct dasd_format_entry { |
520 | struct list_head list; | |
521 | sector_t track; | |
522 | }; | |
523 | ||
1da177e4 LT |
524 | struct dasd_device { |
525 | /* Block device stuff. */ | |
8e09f215 SW |
526 | struct dasd_block *block; |
527 | ||
1da177e4 | 528 | unsigned int devindex; |
138c014d HH |
529 | unsigned long flags; /* per device flags */ |
530 | unsigned short features; /* copy of devmap-features (read-only!) */ | |
1da177e4 | 531 | |
20c64468 SW |
532 | /* extended error reporting stuff (eer) */ |
533 | struct dasd_ccw_req *eer_cqr; | |
534 | ||
1da177e4 LT |
535 | /* Device discipline stuff. */ |
536 | struct dasd_discipline *discipline; | |
aa88861f | 537 | struct dasd_discipline *base_discipline; |
543691a4 | 538 | void *private; |
c9346151 SH |
539 | struct dasd_path path[8]; |
540 | __u8 opm; | |
1da177e4 LT |
541 | |
542 | /* Device state and target state. */ | |
543 | int state, target; | |
9eb25122 | 544 | struct mutex state_mutex; |
1da177e4 LT |
545 | int stopped; /* device (ccw_device_start) was stopped */ |
546 | ||
8e09f215 | 547 | /* reference count. */ |
1da177e4 | 548 | atomic_t ref_count; |
1da177e4 LT |
549 | |
550 | /* ccw queue and memory for static ccw/erp buffers. */ | |
551 | struct list_head ccw_queue; | |
552 | spinlock_t mem_lock; | |
553 | void *ccw_mem; | |
554 | void *erp_mem; | |
5e2b17e7 | 555 | void *ese_mem; |
1da177e4 LT |
556 | struct list_head ccw_chunks; |
557 | struct list_head erp_chunks; | |
5e2b17e7 | 558 | struct list_head ese_chunks; |
1da177e4 LT |
559 | |
560 | atomic_t tasklet_scheduled; | |
561 | struct tasklet_struct tasklet; | |
562 | struct work_struct kick_work; | |
d41dd122 | 563 | struct work_struct restore_device; |
501183f2 | 564 | struct work_struct reload_device; |
f1633031 | 565 | struct work_struct kick_validate; |
59a9ed5f | 566 | struct work_struct suc_work; |
a521b048 | 567 | struct work_struct requeue_requests; |
1da177e4 LT |
568 | struct timer_list timer; |
569 | ||
570 | debug_info_t *debug_area; | |
571 | ||
572 | struct ccw_device *cdev; | |
573 | ||
8e09f215 SW |
574 | /* hook for alias management */ |
575 | struct list_head alias_list; | |
7c8faa86 SH |
576 | |
577 | /* default expiration time in s */ | |
578 | unsigned long default_expires; | |
1f1ee9ad | 579 | unsigned long default_retries; |
4fa52aa7 | 580 | |
3d71ad32 HR |
581 | unsigned long blk_timeout; |
582 | ||
a521b048 SH |
583 | unsigned long path_thrhld; |
584 | unsigned long path_interval; | |
585 | ||
4fa52aa7 | 586 | struct dentry *debugfs_dentry; |
5a3b7b11 | 587 | struct dentry *hosts_dentry; |
4fa52aa7 | 588 | struct dasd_profile profile; |
5e6bdd37 | 589 | struct dasd_format_entry format_entry; |
19508b20 | 590 | struct kset *paths_info; |
8e09f215 SW |
591 | }; |
592 | ||
593 | struct dasd_block { | |
594 | /* Block device stuff. */ | |
595 | struct gendisk *gdp; | |
596 | struct request_queue *request_queue; | |
597 | spinlock_t request_queue_lock; | |
e443343e | 598 | struct blk_mq_tag_set tag_set; |
8e09f215 SW |
599 | struct block_device *bdev; |
600 | atomic_t open_count; | |
601 | ||
7bf76f01 | 602 | unsigned long blocks; /* size of volume in blocks */ |
8e09f215 SW |
603 | unsigned int bp_block; /* bytes per block */ |
604 | unsigned int s2b_shift; /* log2 (bp_block/512) */ | |
605 | ||
606 | struct dasd_device *base; | |
607 | struct list_head ccw_queue; | |
608 | spinlock_t queue_lock; | |
609 | ||
610 | atomic_t tasklet_scheduled; | |
611 | struct tasklet_struct tasklet; | |
612 | struct timer_list timer; | |
613 | ||
4fa52aa7 SW |
614 | struct dentry *debugfs_dentry; |
615 | struct dasd_profile profile; | |
5e6bdd37 SH |
616 | |
617 | struct list_head format_list; | |
618 | spinlock_t format_lock; | |
1da177e4 LT |
619 | }; |
620 | ||
5db8440c SH |
621 | struct dasd_attention_data { |
622 | struct dasd_device *device; | |
623 | __u8 lpum; | |
624 | }; | |
8e09f215 | 625 | |
e443343e SH |
626 | struct dasd_queue { |
627 | spinlock_t lock; | |
628 | }; | |
629 | ||
1da177e4 LT |
630 | /* reasons why device (ccw_device_start) was stopped */ |
631 | #define DASD_STOPPED_NOT_ACC 1 /* not accessible */ | |
632 | #define DASD_STOPPED_QUIESCE 2 /* Quiesced */ | |
633 | #define DASD_STOPPED_PENDING 4 /* long busy */ | |
634 | #define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */ | |
8e09f215 | 635 | #define DASD_STOPPED_SU 16 /* summary unit check handling */ |
d41dd122 SH |
636 | #define DASD_STOPPED_PM 32 /* pm state transition */ |
637 | #define DASD_UNRESUMED_PM 64 /* pm resume failed state */ | |
9e12e54c | 638 | #define DASD_STOPPED_NOSPC 128 /* no space left */ |
1da177e4 LT |
639 | |
640 | /* per device flags */ | |
1da177e4 | 641 | #define DASD_FLAG_OFFLINE 3 /* device is in offline processing */ |
20c64468 SW |
642 | #define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */ |
643 | #define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */ | |
33b62a30 SW |
644 | #define DASD_FLAG_DEVICE_RO 6 /* The device itself is read-only. Don't |
645 | * confuse this with the user specified | |
646 | * read-only feature. | |
647 | */ | |
5a27e60d SW |
648 | #define DASD_FLAG_IS_RESERVED 7 /* The device is reserved */ |
649 | #define DASD_FLAG_LOCK_STOLEN 8 /* The device lock was stolen */ | |
c8d1c0ff | 650 | #define DASD_FLAG_SUSPENDED 9 /* The device was suspended */ |
d07dc5d8 SH |
651 | #define DASD_FLAG_SAFE_OFFLINE 10 /* safe offline processing requested*/ |
652 | #define DASD_FLAG_SAFE_OFFLINE_RUNNING 11 /* safe offline running */ | |
5ea34a01 | 653 | #define DASD_FLAG_ABORTALL 12 /* Abort all noretry requests */ |
1eb38023 | 654 | #define DASD_FLAG_PATH_VERIFY 13 /* Path verification worker running */ |
59a9ed5f | 655 | #define DASD_FLAG_SUC 14 /* unhandled summary unit check */ |
5a27e60d | 656 | |
5ea34a01 HR |
657 | #define DASD_SLEEPON_START_TAG ((void *) 1) |
658 | #define DASD_SLEEPON_END_TAG ((void *) 2) | |
1da177e4 LT |
659 | |
660 | void dasd_put_device_wake(struct dasd_device *); | |
661 | ||
662 | /* | |
663 | * Reference count inliners | |
664 | */ | |
665 | static inline void | |
666 | dasd_get_device(struct dasd_device *device) | |
667 | { | |
668 | atomic_inc(&device->ref_count); | |
669 | } | |
670 | ||
671 | static inline void | |
672 | dasd_put_device(struct dasd_device *device) | |
673 | { | |
674 | if (atomic_dec_return(&device->ref_count) == 0) | |
675 | dasd_put_device_wake(device); | |
676 | } | |
677 | ||
678 | /* | |
679 | * The static memory in ccw_mem and erp_mem is managed by a sorted | |
680 | * list of free memory chunks. | |
681 | */ | |
682 | struct dasd_mchunk | |
683 | { | |
684 | struct list_head list; | |
685 | unsigned long size; | |
686 | } __attribute__ ((aligned(8))); | |
687 | ||
688 | static inline void | |
689 | dasd_init_chunklist(struct list_head *chunk_list, void *mem, | |
690 | unsigned long size) | |
691 | { | |
692 | struct dasd_mchunk *chunk; | |
693 | ||
694 | INIT_LIST_HEAD(chunk_list); | |
695 | chunk = (struct dasd_mchunk *) mem; | |
696 | chunk->size = size - sizeof(struct dasd_mchunk); | |
697 | list_add(&chunk->list, chunk_list); | |
698 | } | |
699 | ||
700 | static inline void * | |
701 | dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size) | |
702 | { | |
703 | struct dasd_mchunk *chunk, *tmp; | |
704 | ||
705 | size = (size + 7L) & -8L; | |
706 | list_for_each_entry(chunk, chunk_list, list) { | |
707 | if (chunk->size < size) | |
708 | continue; | |
709 | if (chunk->size > size + sizeof(struct dasd_mchunk)) { | |
710 | char *endaddr = (char *) (chunk + 1) + chunk->size; | |
711 | tmp = (struct dasd_mchunk *) (endaddr - size) - 1; | |
712 | tmp->size = size; | |
713 | chunk->size -= size + sizeof(struct dasd_mchunk); | |
714 | chunk = tmp; | |
715 | } else | |
716 | list_del(&chunk->list); | |
717 | return (void *) (chunk + 1); | |
718 | } | |
719 | return NULL; | |
720 | } | |
721 | ||
722 | static inline void | |
723 | dasd_free_chunk(struct list_head *chunk_list, void *mem) | |
724 | { | |
725 | struct dasd_mchunk *chunk, *tmp; | |
726 | struct list_head *p, *left; | |
727 | ||
728 | chunk = (struct dasd_mchunk *) | |
729 | ((char *) mem - sizeof(struct dasd_mchunk)); | |
730 | /* Find out the left neighbour in chunk_list. */ | |
731 | left = chunk_list; | |
732 | list_for_each(p, chunk_list) { | |
733 | if (list_entry(p, struct dasd_mchunk, list) > chunk) | |
734 | break; | |
735 | left = p; | |
736 | } | |
737 | /* Try to merge with right neighbour = next element from left. */ | |
738 | if (left->next != chunk_list) { | |
739 | tmp = list_entry(left->next, struct dasd_mchunk, list); | |
740 | if ((char *) (chunk + 1) + chunk->size == (char *) tmp) { | |
741 | list_del(&tmp->list); | |
742 | chunk->size += tmp->size + sizeof(struct dasd_mchunk); | |
743 | } | |
744 | } | |
745 | /* Try to merge with left neighbour. */ | |
746 | if (left != chunk_list) { | |
747 | tmp = list_entry(left, struct dasd_mchunk, list); | |
748 | if ((char *) (tmp + 1) + tmp->size == (char *) chunk) { | |
749 | tmp->size += chunk->size + sizeof(struct dasd_mchunk); | |
750 | return; | |
751 | } | |
752 | } | |
753 | __list_add(&chunk->list, left, left->next); | |
754 | } | |
755 | ||
756 | /* | |
757 | * Check if bsize is in { 512, 1024, 2048, 4096 } | |
758 | */ | |
759 | static inline int | |
760 | dasd_check_blocksize(int bsize) | |
761 | { | |
e108cebb | 762 | if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize)) |
1da177e4 LT |
763 | return -EMEDIUMTYPE; |
764 | return 0; | |
765 | } | |
766 | ||
767 | /* externals in dasd.c */ | |
4fa52aa7 SW |
768 | #define DASD_PROFILE_OFF 0 |
769 | #define DASD_PROFILE_ON 1 | |
770 | #define DASD_PROFILE_GLOBAL_ONLY 2 | |
1da177e4 LT |
771 | |
772 | extern debug_info_t *dasd_debug_area; | |
8ea55c95 | 773 | extern struct dasd_profile dasd_global_profile; |
4fa52aa7 | 774 | extern unsigned int dasd_global_profile_level; |
83d5cde4 | 775 | extern const struct block_device_operations dasd_device_operations; |
1da177e4 | 776 | |
e18b890b | 777 | extern struct kmem_cache *dasd_page_cache; |
1da177e4 | 778 | |
1da177e4 | 779 | struct dasd_ccw_req * |
c5205f2f | 780 | dasd_smalloc_request(int, int, int, struct dasd_device *, struct dasd_ccw_req *); |
5e2b17e7 | 781 | struct dasd_ccw_req *dasd_fmalloc_request(int, int, int, struct dasd_device *); |
1da177e4 | 782 | void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *); |
5e2b17e7 | 783 | void dasd_ffree_request(struct dasd_ccw_req *, struct dasd_device *); |
5915a873 | 784 | void dasd_wakeup_cb(struct dasd_ccw_req *, void *); |
1da177e4 | 785 | |
1da177e4 LT |
786 | struct dasd_device *dasd_alloc_device(void); |
787 | void dasd_free_device(struct dasd_device *); | |
788 | ||
8e09f215 SW |
789 | struct dasd_block *dasd_alloc_block(void); |
790 | void dasd_free_block(struct dasd_block *); | |
791 | ||
e443343e | 792 | enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved); |
3d71ad32 | 793 | |
1da177e4 LT |
794 | void dasd_enable_device(struct dasd_device *); |
795 | void dasd_set_target_state(struct dasd_device *, int); | |
796 | void dasd_kick_device(struct dasd_device *); | |
d41dd122 | 797 | void dasd_restore_device(struct dasd_device *); |
501183f2 | 798 | void dasd_reload_device(struct dasd_device *); |
a521b048 | 799 | void dasd_schedule_requeue(struct dasd_device *); |
1da177e4 LT |
800 | |
801 | void dasd_add_request_head(struct dasd_ccw_req *); | |
802 | void dasd_add_request_tail(struct dasd_ccw_req *); | |
803 | int dasd_start_IO(struct dasd_ccw_req *); | |
804 | int dasd_term_IO(struct dasd_ccw_req *); | |
8e09f215 SW |
805 | void dasd_schedule_device_bh(struct dasd_device *); |
806 | void dasd_schedule_block_bh(struct dasd_block *); | |
1da177e4 | 807 | int dasd_sleep_on(struct dasd_ccw_req *); |
d42e1712 | 808 | int dasd_sleep_on_queue(struct list_head *); |
1da177e4 | 809 | int dasd_sleep_on_immediatly(struct dasd_ccw_req *); |
bcf36768 | 810 | int dasd_sleep_on_queue_interruptible(struct list_head *); |
1da177e4 | 811 | int dasd_sleep_on_interruptible(struct dasd_ccw_req *); |
8e09f215 SW |
812 | void dasd_device_set_timer(struct dasd_device *, int); |
813 | void dasd_device_clear_timer(struct dasd_device *); | |
814 | void dasd_block_set_timer(struct dasd_block *, int); | |
815 | void dasd_block_clear_timer(struct dasd_block *); | |
1da177e4 | 816 | int dasd_cancel_req(struct dasd_ccw_req *); |
8e09f215 | 817 | int dasd_flush_device_queue(struct dasd_device *); |
e03c5941 | 818 | int dasd_generic_probe(struct ccw_device *); |
c020d722 | 819 | void dasd_generic_free_discipline(struct dasd_device *); |
1da177e4 LT |
820 | void dasd_generic_remove (struct ccw_device *cdev); |
821 | int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *); | |
822 | int dasd_generic_set_offline (struct ccw_device *cdev); | |
823 | int dasd_generic_notify(struct ccw_device *, int); | |
a4d26c6a SW |
824 | int dasd_generic_last_path_gone(struct dasd_device *); |
825 | int dasd_generic_path_operational(struct dasd_device *); | |
4679e893 | 826 | void dasd_generic_shutdown(struct ccw_device *); |
a4d26c6a | 827 | |
8e09f215 | 828 | void dasd_generic_handle_state_change(struct dasd_device *); |
d41dd122 SH |
829 | int dasd_generic_pm_freeze(struct ccw_device *); |
830 | int dasd_generic_restore_device(struct ccw_device *); | |
a23ed009 | 831 | enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *); |
a4d26c6a SW |
832 | void dasd_generic_path_event(struct ccw_device *, int *); |
833 | int dasd_generic_verify_path(struct dasd_device *, __u8); | |
9e12e54c JH |
834 | void dasd_generic_space_exhaust(struct dasd_device *, struct dasd_ccw_req *); |
835 | void dasd_generic_space_avail(struct dasd_device *); | |
1da177e4 | 836 | |
68b781fe | 837 | int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int); |
f3eb5384 | 838 | char *dasd_get_sense(struct irb *); |
17283b56 | 839 | |
eb6e199b SW |
840 | void dasd_device_set_stop_bits(struct dasd_device *, int); |
841 | void dasd_device_remove_stop_bits(struct dasd_device *, int); | |
842 | ||
33b62a30 SW |
843 | int dasd_device_is_ro(struct dasd_device *); |
844 | ||
4fa52aa7 SW |
845 | void dasd_profile_reset(struct dasd_profile *); |
846 | int dasd_profile_on(struct dasd_profile *); | |
847 | void dasd_profile_off(struct dasd_profile *); | |
4fa52aa7 | 848 | char *dasd_get_user_string(const char __user *, size_t); |
33b62a30 | 849 | |
1da177e4 LT |
850 | /* externals in dasd_devmap.c */ |
851 | extern int dasd_max_devindex; | |
852 | extern int dasd_probeonly; | |
853 | extern int dasd_autodetect; | |
40545573 | 854 | extern int dasd_nopav; |
f3eb5384 | 855 | extern int dasd_nofcx; |
1da177e4 LT |
856 | |
857 | int dasd_devmap_init(void); | |
858 | void dasd_devmap_exit(void); | |
859 | ||
860 | struct dasd_device *dasd_create_device(struct ccw_device *); | |
861 | void dasd_delete_device(struct dasd_device *); | |
862 | ||
f24acd45 HH |
863 | int dasd_get_feature(struct ccw_device *, int); |
864 | int dasd_set_feature(struct ccw_device *, int, int); | |
865 | ||
1da177e4 LT |
866 | int dasd_add_sysfs_files(struct ccw_device *); |
867 | void dasd_remove_sysfs_files(struct ccw_device *); | |
19508b20 JH |
868 | void dasd_path_create_kobj(struct dasd_device *, int); |
869 | void dasd_path_create_kobjects(struct dasd_device *); | |
870 | void dasd_path_remove_kobj(struct dasd_device *, int); | |
1da177e4 LT |
871 | |
872 | struct dasd_device *dasd_device_from_cdev(struct ccw_device *); | |
a00bfd71 | 873 | struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *); |
1da177e4 LT |
874 | struct dasd_device *dasd_device_from_devindex(int); |
875 | ||
65f8da47 SW |
876 | void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *); |
877 | struct dasd_device *dasd_device_from_gendisk(struct gendisk *); | |
878 | ||
3b1bea01 | 879 | int dasd_parse(void) __init; |
69f90f6a | 880 | int dasd_busid_known(const char *); |
1da177e4 LT |
881 | |
882 | /* externals in dasd_gendisk.c */ | |
883 | int dasd_gendisk_init(void); | |
884 | void dasd_gendisk_exit(void); | |
8e09f215 SW |
885 | int dasd_gendisk_alloc(struct dasd_block *); |
886 | void dasd_gendisk_free(struct dasd_block *); | |
887 | int dasd_scan_partitions(struct dasd_block *); | |
888 | void dasd_destroy_partitions(struct dasd_block *); | |
1da177e4 LT |
889 | |
890 | /* externals in dasd_ioctl.c */ | |
2c1b6ec1 CH |
891 | int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long); |
892 | int dasd_set_read_only(struct block_device *bdev, bool ro); | |
1da177e4 LT |
893 | |
894 | /* externals in dasd_proc.c */ | |
895 | int dasd_proc_init(void); | |
896 | void dasd_proc_exit(void); | |
897 | ||
898 | /* externals in dasd_erp.c */ | |
899 | struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *); | |
900 | struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *); | |
901 | struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int, | |
902 | struct dasd_device *); | |
903 | void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *); | |
904 | void dasd_log_sense(struct dasd_ccw_req *, struct irb *); | |
fc19f381 | 905 | void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb); |
1da177e4 | 906 | |
1da177e4 | 907 | /* externals in dasd_3990_erp.c */ |
1da177e4 | 908 | struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *); |
f60c768c | 909 | void dasd_3990_erp_handle_sim(struct dasd_device *, char *); |
1da177e4 | 910 | |
20c64468 SW |
911 | /* externals in dasd_eer.c */ |
912 | #ifdef CONFIG_DASD_EER | |
913 | int dasd_eer_init(void); | |
914 | void dasd_eer_exit(void); | |
915 | int dasd_eer_enable(struct dasd_device *); | |
916 | void dasd_eer_disable(struct dasd_device *); | |
917 | void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr, | |
918 | unsigned int id); | |
919 | void dasd_eer_snss(struct dasd_device *); | |
920 | ||
921 | static inline int dasd_eer_enabled(struct dasd_device *device) | |
922 | { | |
923 | return device->eer_cqr != NULL; | |
924 | } | |
925 | #else | |
926 | #define dasd_eer_init() (0) | |
927 | #define dasd_eer_exit() do { } while (0) | |
928 | #define dasd_eer_enable(d) (0) | |
929 | #define dasd_eer_disable(d) do { } while (0) | |
930 | #define dasd_eer_write(d,c,i) do { } while (0) | |
931 | #define dasd_eer_snss(d) do { } while (0) | |
932 | #define dasd_eer_enabled(d) (0) | |
933 | #endif /* CONFIG_DASD_ERR */ | |
934 | ||
c9346151 SH |
935 | |
936 | /* DASD path handling functions */ | |
937 | ||
938 | /* | |
939 | * helper functions to modify bit masks for a given channel path for a device | |
940 | */ | |
941 | static inline int dasd_path_is_operational(struct dasd_device *device, int chp) | |
942 | { | |
943 | return test_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); | |
944 | } | |
945 | ||
946 | static inline int dasd_path_need_verify(struct dasd_device *device, int chp) | |
947 | { | |
948 | return test_bit(DASD_PATH_TBV, &device->path[chp].flags); | |
949 | } | |
950 | ||
951 | static inline void dasd_path_verify(struct dasd_device *device, int chp) | |
952 | { | |
953 | __set_bit(DASD_PATH_TBV, &device->path[chp].flags); | |
954 | } | |
955 | ||
956 | static inline void dasd_path_clear_verify(struct dasd_device *device, int chp) | |
957 | { | |
958 | __clear_bit(DASD_PATH_TBV, &device->path[chp].flags); | |
959 | } | |
960 | ||
961 | static inline void dasd_path_clear_all_verify(struct dasd_device *device) | |
962 | { | |
963 | int chp; | |
964 | ||
965 | for (chp = 0; chp < 8; chp++) | |
966 | dasd_path_clear_verify(device, chp); | |
967 | } | |
968 | ||
969 | static inline void dasd_path_operational(struct dasd_device *device, int chp) | |
970 | { | |
971 | __set_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); | |
972 | device->opm |= (0x80 >> chp); | |
973 | } | |
974 | ||
975 | static inline void dasd_path_nonpreferred(struct dasd_device *device, int chp) | |
976 | { | |
977 | __set_bit(DASD_PATH_NPP, &device->path[chp].flags); | |
978 | } | |
979 | ||
980 | static inline int dasd_path_is_nonpreferred(struct dasd_device *device, int chp) | |
981 | { | |
982 | return test_bit(DASD_PATH_NPP, &device->path[chp].flags); | |
983 | } | |
984 | ||
985 | static inline void dasd_path_clear_nonpreferred(struct dasd_device *device, | |
986 | int chp) | |
987 | { | |
988 | __clear_bit(DASD_PATH_NPP, &device->path[chp].flags); | |
989 | } | |
990 | ||
991 | static inline void dasd_path_preferred(struct dasd_device *device, int chp) | |
992 | { | |
993 | __set_bit(DASD_PATH_PP, &device->path[chp].flags); | |
994 | } | |
995 | ||
996 | static inline int dasd_path_is_preferred(struct dasd_device *device, int chp) | |
997 | { | |
998 | return test_bit(DASD_PATH_PP, &device->path[chp].flags); | |
999 | } | |
1000 | ||
1001 | static inline void dasd_path_clear_preferred(struct dasd_device *device, | |
1002 | int chp) | |
1003 | { | |
1004 | __clear_bit(DASD_PATH_PP, &device->path[chp].flags); | |
1005 | } | |
1006 | ||
1007 | static inline void dasd_path_clear_oper(struct dasd_device *device, int chp) | |
1008 | { | |
1009 | __clear_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); | |
1010 | device->opm &= ~(0x80 >> chp); | |
1011 | } | |
1012 | ||
1013 | static inline void dasd_path_clear_cable(struct dasd_device *device, int chp) | |
1014 | { | |
1015 | __clear_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); | |
1016 | } | |
1017 | ||
1018 | static inline void dasd_path_cuir(struct dasd_device *device, int chp) | |
1019 | { | |
1020 | __set_bit(DASD_PATH_CUIR, &device->path[chp].flags); | |
1021 | } | |
1022 | ||
1023 | static inline int dasd_path_is_cuir(struct dasd_device *device, int chp) | |
1024 | { | |
1025 | return test_bit(DASD_PATH_CUIR, &device->path[chp].flags); | |
1026 | } | |
1027 | ||
1028 | static inline void dasd_path_clear_cuir(struct dasd_device *device, int chp) | |
1029 | { | |
1030 | __clear_bit(DASD_PATH_CUIR, &device->path[chp].flags); | |
1031 | } | |
1032 | ||
a521b048 SH |
1033 | static inline void dasd_path_ifcc(struct dasd_device *device, int chp) |
1034 | { | |
1035 | set_bit(DASD_PATH_IFCC, &device->path[chp].flags); | |
1036 | } | |
1037 | ||
1038 | static inline int dasd_path_is_ifcc(struct dasd_device *device, int chp) | |
1039 | { | |
1040 | return test_bit(DASD_PATH_IFCC, &device->path[chp].flags); | |
1041 | } | |
1042 | ||
1043 | static inline void dasd_path_clear_ifcc(struct dasd_device *device, int chp) | |
1044 | { | |
1045 | clear_bit(DASD_PATH_IFCC, &device->path[chp].flags); | |
1046 | } | |
1047 | ||
c9346151 SH |
1048 | static inline void dasd_path_clear_nohpf(struct dasd_device *device, int chp) |
1049 | { | |
1050 | __clear_bit(DASD_PATH_NOHPF, &device->path[chp].flags); | |
1051 | } | |
1052 | ||
1053 | static inline void dasd_path_miscabled(struct dasd_device *device, int chp) | |
1054 | { | |
1055 | __set_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); | |
1056 | } | |
1057 | ||
1058 | static inline int dasd_path_is_miscabled(struct dasd_device *device, int chp) | |
1059 | { | |
1060 | return test_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); | |
1061 | } | |
1062 | ||
1063 | static inline void dasd_path_nohpf(struct dasd_device *device, int chp) | |
1064 | { | |
1065 | __set_bit(DASD_PATH_NOHPF, &device->path[chp].flags); | |
1066 | } | |
1067 | ||
1068 | static inline int dasd_path_is_nohpf(struct dasd_device *device, int chp) | |
1069 | { | |
1070 | return test_bit(DASD_PATH_NOHPF, &device->path[chp].flags); | |
1071 | } | |
1072 | ||
1073 | /* | |
1074 | * get functions for path masks | |
1075 | * will return a path masks for the given device | |
1076 | */ | |
1077 | ||
1078 | static inline __u8 dasd_path_get_opm(struct dasd_device *device) | |
1079 | { | |
1080 | return device->opm; | |
1081 | } | |
1082 | ||
1083 | static inline __u8 dasd_path_get_tbvpm(struct dasd_device *device) | |
1084 | { | |
1085 | int chp; | |
1086 | __u8 tbvpm = 0x00; | |
1087 | ||
1088 | for (chp = 0; chp < 8; chp++) | |
1089 | if (dasd_path_need_verify(device, chp)) | |
1090 | tbvpm |= 0x80 >> chp; | |
1091 | return tbvpm; | |
1092 | } | |
1093 | ||
1094 | static inline __u8 dasd_path_get_nppm(struct dasd_device *device) | |
1095 | { | |
1096 | int chp; | |
1097 | __u8 npm = 0x00; | |
1098 | ||
1099 | for (chp = 0; chp < 8; chp++) { | |
1100 | if (dasd_path_is_nonpreferred(device, chp)) | |
1101 | npm |= 0x80 >> chp; | |
1102 | } | |
1103 | return npm; | |
1104 | } | |
1105 | ||
1106 | static inline __u8 dasd_path_get_ppm(struct dasd_device *device) | |
1107 | { | |
1108 | int chp; | |
1109 | __u8 ppm = 0x00; | |
1110 | ||
1111 | for (chp = 0; chp < 8; chp++) | |
1112 | if (dasd_path_is_preferred(device, chp)) | |
1113 | ppm |= 0x80 >> chp; | |
1114 | return ppm; | |
1115 | } | |
1116 | ||
1117 | static inline __u8 dasd_path_get_cablepm(struct dasd_device *device) | |
1118 | { | |
1119 | int chp; | |
1120 | __u8 cablepm = 0x00; | |
1121 | ||
1122 | for (chp = 0; chp < 8; chp++) | |
1123 | if (dasd_path_is_miscabled(device, chp)) | |
1124 | cablepm |= 0x80 >> chp; | |
1125 | return cablepm; | |
1126 | } | |
1127 | ||
1128 | static inline __u8 dasd_path_get_cuirpm(struct dasd_device *device) | |
1129 | { | |
1130 | int chp; | |
1131 | __u8 cuirpm = 0x00; | |
1132 | ||
1133 | for (chp = 0; chp < 8; chp++) | |
1134 | if (dasd_path_is_cuir(device, chp)) | |
1135 | cuirpm |= 0x80 >> chp; | |
1136 | return cuirpm; | |
1137 | } | |
1138 | ||
a521b048 SH |
1139 | static inline __u8 dasd_path_get_ifccpm(struct dasd_device *device) |
1140 | { | |
1141 | int chp; | |
1142 | __u8 ifccpm = 0x00; | |
1143 | ||
1144 | for (chp = 0; chp < 8; chp++) | |
1145 | if (dasd_path_is_ifcc(device, chp)) | |
1146 | ifccpm |= 0x80 >> chp; | |
1147 | return ifccpm; | |
1148 | } | |
1149 | ||
c9346151 SH |
1150 | static inline __u8 dasd_path_get_hpfpm(struct dasd_device *device) |
1151 | { | |
1152 | int chp; | |
1153 | __u8 hpfpm = 0x00; | |
1154 | ||
1155 | for (chp = 0; chp < 8; chp++) | |
1156 | if (dasd_path_is_nohpf(device, chp)) | |
1157 | hpfpm |= 0x80 >> chp; | |
1158 | return hpfpm; | |
1159 | } | |
1160 | ||
19508b20 JH |
1161 | static inline u8 dasd_path_get_fcs_path(struct dasd_device *device, int chp) |
1162 | { | |
1163 | return device->path[chp].fc_security; | |
1164 | } | |
1165 | ||
1166 | static inline int dasd_path_get_fcs_device(struct dasd_device *device) | |
1167 | { | |
1168 | u8 fc_sec = 0; | |
1169 | int chp; | |
1170 | ||
1171 | for (chp = 0; chp < 8; chp++) { | |
1172 | if (device->opm & (0x80 >> chp)) { | |
1173 | fc_sec = device->path[chp].fc_security; | |
1174 | break; | |
1175 | } | |
1176 | } | |
1177 | for (; chp < 8; chp++) { | |
1178 | if (device->opm & (0x80 >> chp)) | |
1179 | if (device->path[chp].fc_security != fc_sec) | |
1180 | return -EINVAL; | |
1181 | } | |
1182 | ||
1183 | return fc_sec; | |
1184 | } | |
1185 | ||
c9346151 SH |
1186 | /* |
1187 | * add functions for path masks | |
1188 | * the existing path mask will be extended by the given path mask | |
1189 | */ | |
1190 | static inline void dasd_path_add_tbvpm(struct dasd_device *device, __u8 pm) | |
1191 | { | |
1192 | int chp; | |
1193 | ||
1194 | for (chp = 0; chp < 8; chp++) | |
1195 | if (pm & (0x80 >> chp)) | |
1196 | dasd_path_verify(device, chp); | |
1197 | } | |
1198 | ||
a521b048 SH |
1199 | static inline __u8 dasd_path_get_notoperpm(struct dasd_device *device) |
1200 | { | |
1201 | int chp; | |
1202 | __u8 nopm = 0x00; | |
1203 | ||
1204 | for (chp = 0; chp < 8; chp++) | |
1205 | if (dasd_path_is_nohpf(device, chp) || | |
1206 | dasd_path_is_ifcc(device, chp) || | |
1207 | dasd_path_is_cuir(device, chp) || | |
1208 | dasd_path_is_miscabled(device, chp)) | |
1209 | nopm |= 0x80 >> chp; | |
1210 | return nopm; | |
1211 | } | |
1212 | ||
c9346151 SH |
1213 | static inline void dasd_path_add_opm(struct dasd_device *device, __u8 pm) |
1214 | { | |
1215 | int chp; | |
1216 | ||
1217 | for (chp = 0; chp < 8; chp++) | |
1218 | if (pm & (0x80 >> chp)) { | |
1219 | dasd_path_operational(device, chp); | |
1220 | /* | |
1221 | * if the path is used | |
1222 | * it should not be in one of the negative lists | |
1223 | */ | |
1224 | dasd_path_clear_nohpf(device, chp); | |
1225 | dasd_path_clear_cuir(device, chp); | |
1226 | dasd_path_clear_cable(device, chp); | |
a521b048 | 1227 | dasd_path_clear_ifcc(device, chp); |
c9346151 SH |
1228 | } |
1229 | } | |
1230 | ||
1231 | static inline void dasd_path_add_cablepm(struct dasd_device *device, __u8 pm) | |
1232 | { | |
1233 | int chp; | |
1234 | ||
1235 | for (chp = 0; chp < 8; chp++) | |
1236 | if (pm & (0x80 >> chp)) | |
1237 | dasd_path_miscabled(device, chp); | |
1238 | } | |
1239 | ||
1240 | static inline void dasd_path_add_cuirpm(struct dasd_device *device, __u8 pm) | |
1241 | { | |
1242 | int chp; | |
1243 | ||
1244 | for (chp = 0; chp < 8; chp++) | |
1245 | if (pm & (0x80 >> chp)) | |
1246 | dasd_path_cuir(device, chp); | |
1247 | } | |
1248 | ||
a521b048 SH |
1249 | static inline void dasd_path_add_ifccpm(struct dasd_device *device, __u8 pm) |
1250 | { | |
1251 | int chp; | |
1252 | ||
1253 | for (chp = 0; chp < 8; chp++) | |
1254 | if (pm & (0x80 >> chp)) | |
1255 | dasd_path_ifcc(device, chp); | |
1256 | } | |
1257 | ||
c9346151 SH |
1258 | static inline void dasd_path_add_nppm(struct dasd_device *device, __u8 pm) |
1259 | { | |
1260 | int chp; | |
1261 | ||
1262 | for (chp = 0; chp < 8; chp++) | |
1263 | if (pm & (0x80 >> chp)) | |
1264 | dasd_path_nonpreferred(device, chp); | |
1265 | } | |
1266 | ||
1267 | static inline void dasd_path_add_nohpfpm(struct dasd_device *device, __u8 pm) | |
1268 | { | |
1269 | int chp; | |
1270 | ||
1271 | for (chp = 0; chp < 8; chp++) | |
1272 | if (pm & (0x80 >> chp)) | |
1273 | dasd_path_nohpf(device, chp); | |
1274 | } | |
1275 | ||
1276 | static inline void dasd_path_add_ppm(struct dasd_device *device, __u8 pm) | |
1277 | { | |
1278 | int chp; | |
1279 | ||
1280 | for (chp = 0; chp < 8; chp++) | |
1281 | if (pm & (0x80 >> chp)) | |
1282 | dasd_path_preferred(device, chp); | |
1283 | } | |
1284 | ||
1285 | /* | |
1286 | * set functions for path masks | |
1287 | * the existing path mask will be replaced by the given path mask | |
1288 | */ | |
1289 | static inline void dasd_path_set_tbvpm(struct dasd_device *device, __u8 pm) | |
1290 | { | |
1291 | int chp; | |
1292 | ||
1293 | for (chp = 0; chp < 8; chp++) | |
1294 | if (pm & (0x80 >> chp)) | |
1295 | dasd_path_verify(device, chp); | |
1296 | else | |
1297 | dasd_path_clear_verify(device, chp); | |
1298 | } | |
1299 | ||
1300 | static inline void dasd_path_set_opm(struct dasd_device *device, __u8 pm) | |
1301 | { | |
1302 | int chp; | |
1303 | ||
1304 | for (chp = 0; chp < 8; chp++) { | |
1305 | dasd_path_clear_oper(device, chp); | |
1306 | if (pm & (0x80 >> chp)) { | |
1307 | dasd_path_operational(device, chp); | |
1308 | /* | |
1309 | * if the path is used | |
1310 | * it should not be in one of the negative lists | |
1311 | */ | |
1312 | dasd_path_clear_nohpf(device, chp); | |
1313 | dasd_path_clear_cuir(device, chp); | |
1314 | dasd_path_clear_cable(device, chp); | |
a521b048 | 1315 | dasd_path_clear_ifcc(device, chp); |
c9346151 SH |
1316 | } |
1317 | } | |
1318 | } | |
1319 | ||
1320 | /* | |
1321 | * remove functions for path masks | |
1322 | * the existing path mask will be cleared with the given path mask | |
1323 | */ | |
1324 | static inline void dasd_path_remove_opm(struct dasd_device *device, __u8 pm) | |
1325 | { | |
1326 | int chp; | |
1327 | ||
1328 | for (chp = 0; chp < 8; chp++) { | |
1329 | if (pm & (0x80 >> chp)) | |
1330 | dasd_path_clear_oper(device, chp); | |
1331 | } | |
1332 | } | |
1333 | ||
1334 | /* | |
1335 | * add the newly available path to the to be verified pm and remove it from | |
1336 | * normal operation until it is verified | |
1337 | */ | |
1338 | static inline void dasd_path_available(struct dasd_device *device, int chp) | |
1339 | { | |
1340 | dasd_path_clear_oper(device, chp); | |
1341 | dasd_path_verify(device, chp); | |
1342 | } | |
1343 | ||
1344 | static inline void dasd_path_notoper(struct dasd_device *device, int chp) | |
1345 | { | |
1346 | dasd_path_clear_oper(device, chp); | |
1347 | dasd_path_clear_preferred(device, chp); | |
1348 | dasd_path_clear_nonpreferred(device, chp); | |
1349 | } | |
1350 | ||
1351 | /* | |
1352 | * remove all paths from normal operation | |
1353 | */ | |
1354 | static inline void dasd_path_no_path(struct dasd_device *device) | |
1355 | { | |
1356 | int chp; | |
1357 | ||
1358 | for (chp = 0; chp < 8; chp++) | |
1359 | dasd_path_notoper(device, chp); | |
1360 | ||
1361 | dasd_path_clear_all_verify(device); | |
1362 | } | |
1363 | ||
1364 | /* end - path handling */ | |
1365 | ||
1da177e4 | 1366 | #endif /* DASD_H */ |