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 | ||
99 | #define DBF_DEV_EXC(d_level, d_device, d_str, d_data...) \ | |
100 | do { \ | |
101 | debug_sprintf_exception(d_device->debug_area, \ | |
102 | d_level, \ | |
103 | d_str "\n", \ | |
104 | d_data); \ | |
105 | } while(0) | |
106 | ||
107 | #define DBF_EVENT(d_level, d_str, d_data...)\ | |
108 | do { \ | |
109 | debug_sprintf_event(dasd_debug_area, \ | |
110 | d_level,\ | |
111 | d_str "\n", \ | |
112 | d_data); \ | |
113 | } while(0) | |
114 | ||
b8ed5dd5 SH |
115 | #define DBF_EVENT_DEVID(d_level, d_cdev, d_str, d_data...) \ |
116 | do { \ | |
117 | struct ccw_dev_id __dev_id; \ | |
118 | ccw_device_get_id(d_cdev, &__dev_id); \ | |
119 | debug_sprintf_event(dasd_debug_area, \ | |
120 | d_level, \ | |
121 | "0.%x.%04x " d_str "\n", \ | |
122 | __dev_id.ssid, __dev_id.devno, d_data); \ | |
123 | } while (0) | |
124 | ||
1da177e4 LT |
125 | #define DBF_EXC(d_level, d_str, d_data...)\ |
126 | do { \ | |
127 | debug_sprintf_exception(dasd_debug_area, \ | |
128 | d_level,\ | |
129 | d_str "\n", \ | |
130 | d_data); \ | |
131 | } while(0) | |
132 | ||
fc19f381 SH |
133 | /* limit size for an errorstring */ |
134 | #define ERRORLENGTH 30 | |
135 | ||
1da177e4 LT |
136 | /* definition of dbf debug levels */ |
137 | #define DBF_EMERG 0 /* system is unusable */ | |
138 | #define DBF_ALERT 1 /* action must be taken immediately */ | |
139 | #define DBF_CRIT 2 /* critical conditions */ | |
140 | #define DBF_ERR 3 /* error conditions */ | |
141 | #define DBF_WARNING 4 /* warning conditions */ | |
142 | #define DBF_NOTICE 5 /* normal but significant condition */ | |
143 | #define DBF_INFO 6 /* informational */ | |
144 | #define DBF_DEBUG 6 /* debug-level messages */ | |
145 | ||
146 | /* messages to be written via klogd and dbf */ | |
147 | #define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\ | |
148 | do { \ | |
149 | printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \ | |
2a0217d5 | 150 | dev_name(&d_device->cdev->dev), d_args); \ |
1da177e4 LT |
151 | DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \ |
152 | } while(0) | |
153 | ||
154 | #define MESSAGE(d_loglevel,d_string,d_args...)\ | |
155 | do { \ | |
156 | printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \ | |
157 | DBF_EVENT(DBF_ALERT, d_string, d_args); \ | |
158 | } while(0) | |
159 | ||
160 | /* messages to be written via klogd only */ | |
161 | #define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\ | |
162 | do { \ | |
163 | printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \ | |
2a0217d5 | 164 | dev_name(&d_device->cdev->dev), d_args); \ |
1da177e4 LT |
165 | } while(0) |
166 | ||
167 | #define MESSAGE_LOG(d_loglevel,d_string,d_args...)\ | |
168 | do { \ | |
169 | printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \ | |
170 | } while(0) | |
171 | ||
28b841b3 JH |
172 | /* Macro to calculate number of blocks per page */ |
173 | #define BLOCKS_PER_PAGE(blksize) (PAGE_SIZE / blksize) | |
174 | ||
1da177e4 LT |
175 | struct dasd_ccw_req { |
176 | unsigned int magic; /* Eye catcher */ | |
8e09f215 SW |
177 | struct list_head devlist; /* for dasd_device request queue */ |
178 | struct list_head blocklist; /* for dasd_block request queue */ | |
1da177e4 LT |
179 | |
180 | /* Where to execute what... */ | |
8e09f215 SW |
181 | struct dasd_block *block; /* the originating block device */ |
182 | struct dasd_device *memdev; /* the device used to allocate this */ | |
183 | struct dasd_device *startdev; /* device the request is started on */ | |
29b8dd9d | 184 | struct dasd_device *basedev; /* base device if no block->base */ |
f3eb5384 SW |
185 | void *cpaddr; /* address of ccw or tcw */ |
186 | unsigned char cpmode; /* 0 = cmd mode, 1 = itcw */ | |
8e09f215 | 187 | char status; /* status of this request */ |
1da177e4 LT |
188 | short retries; /* A retry counter */ |
189 | unsigned long flags; /* flags of this request */ | |
e443343e | 190 | struct dasd_queue *dq; |
1da177e4 LT |
191 | |
192 | /* ... and how */ | |
193 | unsigned long starttime; /* jiffies time of request start */ | |
7c8faa86 | 194 | unsigned long expires; /* expiration period in jiffies */ |
8e09f215 | 195 | char lpm; /* logical path mask */ |
1da177e4 LT |
196 | void *data; /* pointer to data area */ |
197 | ||
198 | /* these are important for recovering erroneous requests */ | |
6cc7f168 | 199 | int intrc; /* internal error, e.g. from start_IO */ |
1da177e4 LT |
200 | struct irb irb; /* device status in case of an error */ |
201 | struct dasd_ccw_req *refers; /* ERP-chain queueing. */ | |
202 | void *function; /* originating ERP action */ | |
203 | ||
204 | /* these are for statistics only */ | |
7bf76f01 JH |
205 | unsigned long buildclk; /* TOD-clock of request generation */ |
206 | unsigned long startclk; /* TOD-clock of request start */ | |
207 | unsigned long stopclk; /* TOD-clock of request interrupt */ | |
208 | unsigned long endclk; /* TOD-clock of request termination */ | |
1da177e4 LT |
209 | |
210 | /* Callback that is called after reaching final status. */ | |
8e09f215 SW |
211 | void (*callback)(struct dasd_ccw_req *, void *data); |
212 | void *callback_data; | |
1da177e4 LT |
213 | }; |
214 | ||
138c014d | 215 | /* |
1da177e4 LT |
216 | * dasd_ccw_req -> status can be: |
217 | */ | |
8e09f215 SW |
218 | #define DASD_CQR_FILLED 0x00 /* request is ready to be processed */ |
219 | #define DASD_CQR_DONE 0x01 /* request is completed successfully */ | |
220 | #define DASD_CQR_NEED_ERP 0x02 /* request needs recovery action */ | |
221 | #define DASD_CQR_IN_ERP 0x03 /* request is in recovery */ | |
222 | #define DASD_CQR_FAILED 0x04 /* request is finally failed */ | |
223 | #define DASD_CQR_TERMINATED 0x05 /* request was stopped by driver */ | |
224 | ||
225 | #define DASD_CQR_QUEUED 0x80 /* request is queued to be processed */ | |
226 | #define DASD_CQR_IN_IO 0x81 /* request is currently in IO */ | |
227 | #define DASD_CQR_ERROR 0x82 /* request is completed with error */ | |
228 | #define DASD_CQR_CLEAR_PENDING 0x83 /* request is clear pending */ | |
229 | #define DASD_CQR_CLEARED 0x84 /* request was cleared */ | |
73ac36ea | 230 | #define DASD_CQR_SUCCESS 0x85 /* request was successful */ |
8e09f215 | 231 | |
7c8faa86 SH |
232 | /* default expiration time*/ |
233 | #define DASD_EXPIRES 300 | |
234 | #define DASD_EXPIRES_MAX 40000000 | |
1f1ee9ad HR |
235 | #define DASD_RETRIES 256 |
236 | #define DASD_RETRIES_MAX 32768 | |
1da177e4 LT |
237 | |
238 | /* per dasd_ccw_req flags */ | |
239 | #define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */ | |
1c01b8a5 | 240 | #define DASD_CQR_FLAGS_FAILFAST 1 /* FAILFAST */ |
a4d26c6a | 241 | #define DASD_CQR_VERIFY_PATH 2 /* path verification request */ |
5a27e60d SW |
242 | #define DASD_CQR_ALLOW_SLOCK 3 /* Try this request even when lock was |
243 | * stolen. Should not be combined with | |
244 | * DASD_CQR_FLAGS_USE_ERP | |
245 | */ | |
8fd57520 JH |
246 | /* |
247 | * The following flags are used to suppress output of certain errors. | |
8fd57520 JH |
248 | */ |
249 | #define DASD_CQR_SUPPRESS_NRF 4 /* Suppress 'No Record Found' error */ | |
250 | #define DASD_CQR_SUPPRESS_FP 5 /* Suppress 'File Protected' error*/ | |
251 | #define DASD_CQR_SUPPRESS_IL 6 /* Suppress 'Incorrect Length' error */ | |
ab24fbd3 | 252 | #define DASD_CQR_SUPPRESS_CR 7 /* Suppress 'Command Reject' error */ |
1da177e4 | 253 | |
e443343e SH |
254 | /* |
255 | * There is no reliable way to determine the number of available CPUs on | |
256 | * LPAR but there is no big performance difference between 1 and the | |
257 | * maximum CPU number. | |
258 | * 64 is a good trade off performance wise. | |
259 | */ | |
260 | #define DASD_NR_HW_QUEUES 64 | |
261 | #define DASD_MAX_LCU_DEV 256 | |
262 | #define DASD_REQ_PER_DEV 4 | |
263 | ||
1da177e4 LT |
264 | /* Signature for error recovery functions. */ |
265 | typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *); | |
266 | ||
46d1c03c JH |
267 | /* |
268 | * A single CQR can only contain a maximum of 255 CCWs. It is limited by | |
269 | * the locate record and locate record extended count value which can only hold | |
270 | * 1 Byte max. | |
271 | */ | |
272 | #define DASD_CQR_MAX_CCW 255 | |
273 | ||
2dedf0d9 SH |
274 | /* |
275 | * Unique identifier for dasd device. | |
276 | */ | |
277 | #define UA_NOT_CONFIGURED 0x00 | |
278 | #define UA_BASE_DEVICE 0x01 | |
279 | #define UA_BASE_PAV_ALIAS 0x02 | |
280 | #define UA_HYPER_PAV_ALIAS 0x03 | |
281 | ||
282 | struct dasd_uid { | |
283 | __u8 type; | |
284 | char vendor[4]; | |
285 | char serial[15]; | |
286 | __u16 ssid; | |
287 | __u8 real_unit_addr; | |
288 | __u8 base_unit_addr; | |
289 | char vduit[33]; | |
290 | }; | |
291 | ||
1da177e4 LT |
292 | /* |
293 | * the struct dasd_discipline is | |
294 | * sth like a table of virtual functions, if you think of dasd_eckd | |
295 | * inheriting dasd... | |
296 | * no, currently we are not planning to reimplement the driver in C++ | |
297 | */ | |
298 | struct dasd_discipline { | |
299 | struct module *owner; | |
300 | char ebcname[8]; /* a name used for tagging and printks */ | |
301 | char name[8]; /* a name used for tagging and printks */ | |
302 | int max_blocks; /* maximum number of blocks to be chained */ | |
303 | ||
304 | struct list_head list; /* used for list of disciplines */ | |
305 | ||
8e09f215 SW |
306 | /* |
307 | * Device recognition functions. check_device is used to verify | |
308 | * the sense data and the information returned by read device | |
309 | * characteristics. It returns 0 if the discipline can be used | |
310 | * for the device in question. uncheck_device is called during | |
311 | * device shutdown to deregister a device from its discipline. | |
312 | */ | |
313 | int (*check_device) (struct dasd_device *); | |
314 | void (*uncheck_device) (struct dasd_device *); | |
315 | ||
316 | /* | |
317 | * do_analysis is used in the step from device state "basic" to | |
318 | * state "accept". It returns 0 if the device can be made ready, | |
319 | * it returns -EMEDIUMTYPE if the device can't be made ready or | |
320 | * -EAGAIN if do_analysis started a ccw that needs to complete | |
321 | * before the analysis may be repeated. | |
322 | */ | |
323 | int (*do_analysis) (struct dasd_block *); | |
324 | ||
a4d26c6a SW |
325 | /* |
326 | * This function is called, when new paths become available. | |
327 | * Disciplins may use this callback to do necessary setup work, | |
328 | * e.g. verify that new path is compatible with the current | |
329 | * configuration. | |
330 | */ | |
331 | int (*verify_path)(struct dasd_device *, __u8); | |
332 | ||
8e09f215 SW |
333 | /* |
334 | * Last things to do when a device is set online, and first things | |
335 | * when it is set offline. | |
336 | */ | |
d42e1712 | 337 | int (*basic_to_ready) (struct dasd_device *); |
8e09f215 | 338 | int (*online_to_ready) (struct dasd_device *); |
daa991bf | 339 | int (*basic_to_known)(struct dasd_device *); |
8e09f215 | 340 | |
d42e1712 | 341 | /* (struct dasd_device *); |
8e09f215 SW |
342 | * Device operation functions. build_cp creates a ccw chain for |
343 | * a block device request, start_io starts the request and | |
344 | * term_IO cancels it (e.g. in case of a timeout). format_device | |
8fd57520 JH |
345 | * formats the device and check_device_format compares the format of |
346 | * a device with the expected format_data. | |
8e09f215 SW |
347 | * handle_terminated_request allows to examine a cqr and prepare |
348 | * it for retry. | |
349 | */ | |
1da177e4 | 350 | struct dasd_ccw_req *(*build_cp) (struct dasd_device *, |
8e09f215 | 351 | struct dasd_block *, |
1da177e4 LT |
352 | struct request *); |
353 | int (*start_IO) (struct dasd_ccw_req *); | |
354 | int (*term_IO) (struct dasd_ccw_req *); | |
8e09f215 | 355 | void (*handle_terminated_request) (struct dasd_ccw_req *); |
d42e1712 | 356 | int (*format_device) (struct dasd_device *, |
8fd57520 JH |
357 | struct format_data_t *, int); |
358 | int (*check_device_format)(struct dasd_device *, | |
359 | struct format_check_t *, int); | |
1da177e4 | 360 | int (*free_cp) (struct dasd_ccw_req *, struct request *); |
8e09f215 SW |
361 | |
362 | /* | |
363 | * Error recovery functions. examine_error() returns a value that | |
364 | * indicates what to do for an error condition. If examine_error() | |
138c014d | 365 | * returns 'dasd_era_recover' erp_action() is called to create a |
8e09f215 SW |
366 | * special error recovery ccw. erp_postaction() is called after |
367 | * an error recovery ccw has finished its execution. dump_sense | |
368 | * is called for every error condition to print the sense data | |
369 | * to the console. | |
370 | */ | |
1da177e4 LT |
371 | dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *); |
372 | dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *); | |
373 | void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *, | |
374 | struct irb *); | |
aeec92ca | 375 | void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *); |
5a27e60d SW |
376 | void (*check_for_device_change) (struct dasd_device *, |
377 | struct dasd_ccw_req *, | |
378 | struct irb *); | |
8e09f215 | 379 | |
1da177e4 | 380 | /* i/o control functions. */ |
8e09f215 | 381 | int (*fill_geometry) (struct dasd_block *, struct hd_geometry *); |
1da177e4 | 382 | int (*fill_info) (struct dasd_device *, struct dasd_information2_t *); |
8e09f215 | 383 | int (*ioctl) (struct dasd_block *, unsigned int, void __user *); |
d41dd122 SH |
384 | |
385 | /* suspend/resume functions */ | |
386 | int (*freeze) (struct dasd_device *); | |
387 | int (*restore) (struct dasd_device *); | |
501183f2 SH |
388 | |
389 | /* reload device after state change */ | |
390 | int (*reload) (struct dasd_device *); | |
2dedf0d9 SH |
391 | |
392 | int (*get_uid) (struct dasd_device *, struct dasd_uid *); | |
f1633031 | 393 | void (*kick_validate) (struct dasd_device *); |
5db8440c | 394 | int (*check_attention)(struct dasd_device *, __u8); |
5a3b7b11 SH |
395 | int (*host_access_count)(struct dasd_device *); |
396 | int (*hosts_print)(struct dasd_device *, struct seq_file *); | |
a521b048 SH |
397 | void (*handle_hpf_error)(struct dasd_device *, struct irb *); |
398 | void (*disable_hpf)(struct dasd_device *); | |
399 | int (*hpf_enabled)(struct dasd_device *); | |
400 | void (*reset_path)(struct dasd_device *, __u8); | |
1da177e4 LT |
401 | }; |
402 | ||
403 | extern struct dasd_discipline *dasd_diag_discipline_pointer; | |
404 | ||
20c64468 SW |
405 | /* |
406 | * Notification numbers for extended error reporting notifications: | |
407 | * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's | |
408 | * eer pointer) is freed. The error reporting module needs to do all necessary | |
409 | * cleanup steps. | |
410 | * The DASD_EER_TRIGGER notification sends the actual error reports (triggers). | |
411 | */ | |
412 | #define DASD_EER_DISABLE 0 | |
413 | #define DASD_EER_TRIGGER 1 | |
414 | ||
415 | /* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */ | |
416 | #define DASD_EER_FATALERROR 1 | |
417 | #define DASD_EER_NOPATH 2 | |
418 | #define DASD_EER_STATECHANGE 3 | |
419 | #define DASD_EER_PPRCSUSPEND 4 | |
420 | ||
c9346151 SH |
421 | /* DASD path handling */ |
422 | ||
423 | #define DASD_PATH_OPERATIONAL 1 | |
424 | #define DASD_PATH_TBV 2 | |
425 | #define DASD_PATH_PP 3 | |
426 | #define DASD_PATH_NPP 4 | |
427 | #define DASD_PATH_MISCABLED 5 | |
428 | #define DASD_PATH_NOHPF 6 | |
429 | #define DASD_PATH_CUIR 7 | |
a521b048 | 430 | #define DASD_PATH_IFCC 8 |
c9346151 | 431 | |
a521b048 SH |
432 | #define DASD_THRHLD_MAX 4294967295U |
433 | #define DASD_INTERVAL_MAX 4294967295U | |
c9346151 | 434 | |
a4d26c6a | 435 | struct dasd_path { |
c9346151 | 436 | unsigned long flags; |
a521b048 SH |
437 | u8 cssid; |
438 | u8 ssid; | |
439 | u8 chpid; | |
c9346151 | 440 | struct dasd_conf_data *conf_data; |
a521b048 | 441 | atomic_t error_count; |
7bf76f01 | 442 | unsigned long errorclk; |
a4d26c6a SW |
443 | }; |
444 | ||
c9346151 | 445 | |
4fa52aa7 SW |
446 | struct dasd_profile_info { |
447 | /* legacy part of profile data, as in dasd_profile_info_t */ | |
448 | unsigned int dasd_io_reqs; /* number of requests processed */ | |
449 | unsigned int dasd_io_sects; /* number of sectors processed */ | |
450 | unsigned int dasd_io_secs[32]; /* histogram of request's sizes */ | |
451 | unsigned int dasd_io_times[32]; /* histogram of requests's times */ | |
452 | unsigned int dasd_io_timps[32]; /* h. of requests's times per sector */ | |
453 | unsigned int dasd_io_time1[32]; /* hist. of time from build to start */ | |
454 | unsigned int dasd_io_time2[32]; /* hist. of time from start to irq */ | |
455 | unsigned int dasd_io_time2ps[32]; /* hist. of time from start to irq */ | |
456 | unsigned int dasd_io_time3[32]; /* hist. of time from irq to end */ | |
457 | unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */ | |
458 | ||
459 | /* new data */ | |
460 | struct timespec starttod; /* time of start or last reset */ | |
461 | unsigned int dasd_io_alias; /* requests using an alias */ | |
462 | unsigned int dasd_io_tpm; /* requests using transport mode */ | |
463 | unsigned int dasd_read_reqs; /* total number of read requests */ | |
464 | unsigned int dasd_read_sects; /* total number read sectors */ | |
465 | unsigned int dasd_read_alias; /* read request using an alias */ | |
466 | unsigned int dasd_read_tpm; /* read requests in transport mode */ | |
467 | unsigned int dasd_read_secs[32]; /* histogram of request's sizes */ | |
468 | unsigned int dasd_read_times[32]; /* histogram of requests's times */ | |
469 | unsigned int dasd_read_time1[32]; /* hist. time from build to start */ | |
470 | unsigned int dasd_read_time2[32]; /* hist. of time from start to irq */ | |
471 | unsigned int dasd_read_time3[32]; /* hist. of time from irq to end */ | |
472 | unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */ | |
d2907225 SH |
473 | unsigned long dasd_sum_times; /* sum of request times */ |
474 | unsigned long dasd_sum_time_str; /* sum of time from build to start */ | |
475 | unsigned long dasd_sum_time_irq; /* sum of time from start to irq */ | |
476 | unsigned long dasd_sum_time_end; /* sum of time from irq to end */ | |
4fa52aa7 SW |
477 | }; |
478 | ||
479 | struct dasd_profile { | |
480 | struct dentry *dentry; | |
481 | struct dasd_profile_info *data; | |
482 | spinlock_t lock; | |
483 | }; | |
484 | ||
1da177e4 LT |
485 | struct dasd_device { |
486 | /* Block device stuff. */ | |
8e09f215 SW |
487 | struct dasd_block *block; |
488 | ||
1da177e4 | 489 | unsigned int devindex; |
138c014d HH |
490 | unsigned long flags; /* per device flags */ |
491 | unsigned short features; /* copy of devmap-features (read-only!) */ | |
1da177e4 | 492 | |
20c64468 SW |
493 | /* extended error reporting stuff (eer) */ |
494 | struct dasd_ccw_req *eer_cqr; | |
495 | ||
1da177e4 LT |
496 | /* Device discipline stuff. */ |
497 | struct dasd_discipline *discipline; | |
aa88861f | 498 | struct dasd_discipline *base_discipline; |
543691a4 | 499 | void *private; |
c9346151 SH |
500 | struct dasd_path path[8]; |
501 | __u8 opm; | |
1da177e4 LT |
502 | |
503 | /* Device state and target state. */ | |
504 | int state, target; | |
9eb25122 | 505 | struct mutex state_mutex; |
1da177e4 LT |
506 | int stopped; /* device (ccw_device_start) was stopped */ |
507 | ||
8e09f215 | 508 | /* reference count. */ |
1da177e4 | 509 | atomic_t ref_count; |
1da177e4 LT |
510 | |
511 | /* ccw queue and memory for static ccw/erp buffers. */ | |
512 | struct list_head ccw_queue; | |
513 | spinlock_t mem_lock; | |
514 | void *ccw_mem; | |
515 | void *erp_mem; | |
516 | struct list_head ccw_chunks; | |
517 | struct list_head erp_chunks; | |
518 | ||
519 | atomic_t tasklet_scheduled; | |
520 | struct tasklet_struct tasklet; | |
521 | struct work_struct kick_work; | |
d41dd122 | 522 | struct work_struct restore_device; |
501183f2 | 523 | struct work_struct reload_device; |
f1633031 | 524 | struct work_struct kick_validate; |
59a9ed5f | 525 | struct work_struct suc_work; |
a521b048 | 526 | struct work_struct requeue_requests; |
1da177e4 LT |
527 | struct timer_list timer; |
528 | ||
529 | debug_info_t *debug_area; | |
530 | ||
531 | struct ccw_device *cdev; | |
532 | ||
8e09f215 SW |
533 | /* hook for alias management */ |
534 | struct list_head alias_list; | |
7c8faa86 SH |
535 | |
536 | /* default expiration time in s */ | |
537 | unsigned long default_expires; | |
1f1ee9ad | 538 | unsigned long default_retries; |
4fa52aa7 | 539 | |
3d71ad32 HR |
540 | unsigned long blk_timeout; |
541 | ||
a521b048 SH |
542 | unsigned long path_thrhld; |
543 | unsigned long path_interval; | |
544 | ||
4fa52aa7 | 545 | struct dentry *debugfs_dentry; |
5a3b7b11 | 546 | struct dentry *hosts_dentry; |
4fa52aa7 | 547 | struct dasd_profile profile; |
8e09f215 SW |
548 | }; |
549 | ||
550 | struct dasd_block { | |
551 | /* Block device stuff. */ | |
552 | struct gendisk *gdp; | |
553 | struct request_queue *request_queue; | |
554 | spinlock_t request_queue_lock; | |
e443343e | 555 | struct blk_mq_tag_set tag_set; |
8e09f215 SW |
556 | struct block_device *bdev; |
557 | atomic_t open_count; | |
558 | ||
7bf76f01 | 559 | unsigned long blocks; /* size of volume in blocks */ |
8e09f215 SW |
560 | unsigned int bp_block; /* bytes per block */ |
561 | unsigned int s2b_shift; /* log2 (bp_block/512) */ | |
562 | ||
563 | struct dasd_device *base; | |
564 | struct list_head ccw_queue; | |
565 | spinlock_t queue_lock; | |
566 | ||
567 | atomic_t tasklet_scheduled; | |
568 | struct tasklet_struct tasklet; | |
569 | struct timer_list timer; | |
570 | ||
4fa52aa7 SW |
571 | struct dentry *debugfs_dentry; |
572 | struct dasd_profile profile; | |
1da177e4 LT |
573 | }; |
574 | ||
5db8440c SH |
575 | struct dasd_attention_data { |
576 | struct dasd_device *device; | |
577 | __u8 lpum; | |
578 | }; | |
8e09f215 | 579 | |
e443343e SH |
580 | struct dasd_queue { |
581 | spinlock_t lock; | |
582 | }; | |
583 | ||
1da177e4 LT |
584 | /* reasons why device (ccw_device_start) was stopped */ |
585 | #define DASD_STOPPED_NOT_ACC 1 /* not accessible */ | |
586 | #define DASD_STOPPED_QUIESCE 2 /* Quiesced */ | |
587 | #define DASD_STOPPED_PENDING 4 /* long busy */ | |
588 | #define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */ | |
8e09f215 | 589 | #define DASD_STOPPED_SU 16 /* summary unit check handling */ |
d41dd122 SH |
590 | #define DASD_STOPPED_PM 32 /* pm state transition */ |
591 | #define DASD_UNRESUMED_PM 64 /* pm resume failed state */ | |
1da177e4 LT |
592 | |
593 | /* per device flags */ | |
1da177e4 | 594 | #define DASD_FLAG_OFFLINE 3 /* device is in offline processing */ |
20c64468 SW |
595 | #define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */ |
596 | #define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */ | |
33b62a30 SW |
597 | #define DASD_FLAG_DEVICE_RO 6 /* The device itself is read-only. Don't |
598 | * confuse this with the user specified | |
599 | * read-only feature. | |
600 | */ | |
5a27e60d SW |
601 | #define DASD_FLAG_IS_RESERVED 7 /* The device is reserved */ |
602 | #define DASD_FLAG_LOCK_STOLEN 8 /* The device lock was stolen */ | |
c8d1c0ff | 603 | #define DASD_FLAG_SUSPENDED 9 /* The device was suspended */ |
d07dc5d8 SH |
604 | #define DASD_FLAG_SAFE_OFFLINE 10 /* safe offline processing requested*/ |
605 | #define DASD_FLAG_SAFE_OFFLINE_RUNNING 11 /* safe offline running */ | |
5ea34a01 | 606 | #define DASD_FLAG_ABORTALL 12 /* Abort all noretry requests */ |
1eb38023 | 607 | #define DASD_FLAG_PATH_VERIFY 13 /* Path verification worker running */ |
59a9ed5f | 608 | #define DASD_FLAG_SUC 14 /* unhandled summary unit check */ |
5a27e60d | 609 | |
5ea34a01 HR |
610 | #define DASD_SLEEPON_START_TAG ((void *) 1) |
611 | #define DASD_SLEEPON_END_TAG ((void *) 2) | |
1da177e4 LT |
612 | |
613 | void dasd_put_device_wake(struct dasd_device *); | |
614 | ||
615 | /* | |
616 | * Reference count inliners | |
617 | */ | |
618 | static inline void | |
619 | dasd_get_device(struct dasd_device *device) | |
620 | { | |
621 | atomic_inc(&device->ref_count); | |
622 | } | |
623 | ||
624 | static inline void | |
625 | dasd_put_device(struct dasd_device *device) | |
626 | { | |
627 | if (atomic_dec_return(&device->ref_count) == 0) | |
628 | dasd_put_device_wake(device); | |
629 | } | |
630 | ||
631 | /* | |
632 | * The static memory in ccw_mem and erp_mem is managed by a sorted | |
633 | * list of free memory chunks. | |
634 | */ | |
635 | struct dasd_mchunk | |
636 | { | |
637 | struct list_head list; | |
638 | unsigned long size; | |
639 | } __attribute__ ((aligned(8))); | |
640 | ||
641 | static inline void | |
642 | dasd_init_chunklist(struct list_head *chunk_list, void *mem, | |
643 | unsigned long size) | |
644 | { | |
645 | struct dasd_mchunk *chunk; | |
646 | ||
647 | INIT_LIST_HEAD(chunk_list); | |
648 | chunk = (struct dasd_mchunk *) mem; | |
649 | chunk->size = size - sizeof(struct dasd_mchunk); | |
650 | list_add(&chunk->list, chunk_list); | |
651 | } | |
652 | ||
653 | static inline void * | |
654 | dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size) | |
655 | { | |
656 | struct dasd_mchunk *chunk, *tmp; | |
657 | ||
658 | size = (size + 7L) & -8L; | |
659 | list_for_each_entry(chunk, chunk_list, list) { | |
660 | if (chunk->size < size) | |
661 | continue; | |
662 | if (chunk->size > size + sizeof(struct dasd_mchunk)) { | |
663 | char *endaddr = (char *) (chunk + 1) + chunk->size; | |
664 | tmp = (struct dasd_mchunk *) (endaddr - size) - 1; | |
665 | tmp->size = size; | |
666 | chunk->size -= size + sizeof(struct dasd_mchunk); | |
667 | chunk = tmp; | |
668 | } else | |
669 | list_del(&chunk->list); | |
670 | return (void *) (chunk + 1); | |
671 | } | |
672 | return NULL; | |
673 | } | |
674 | ||
675 | static inline void | |
676 | dasd_free_chunk(struct list_head *chunk_list, void *mem) | |
677 | { | |
678 | struct dasd_mchunk *chunk, *tmp; | |
679 | struct list_head *p, *left; | |
680 | ||
681 | chunk = (struct dasd_mchunk *) | |
682 | ((char *) mem - sizeof(struct dasd_mchunk)); | |
683 | /* Find out the left neighbour in chunk_list. */ | |
684 | left = chunk_list; | |
685 | list_for_each(p, chunk_list) { | |
686 | if (list_entry(p, struct dasd_mchunk, list) > chunk) | |
687 | break; | |
688 | left = p; | |
689 | } | |
690 | /* Try to merge with right neighbour = next element from left. */ | |
691 | if (left->next != chunk_list) { | |
692 | tmp = list_entry(left->next, struct dasd_mchunk, list); | |
693 | if ((char *) (chunk + 1) + chunk->size == (char *) tmp) { | |
694 | list_del(&tmp->list); | |
695 | chunk->size += tmp->size + sizeof(struct dasd_mchunk); | |
696 | } | |
697 | } | |
698 | /* Try to merge with left neighbour. */ | |
699 | if (left != chunk_list) { | |
700 | tmp = list_entry(left, struct dasd_mchunk, list); | |
701 | if ((char *) (tmp + 1) + tmp->size == (char *) chunk) { | |
702 | tmp->size += chunk->size + sizeof(struct dasd_mchunk); | |
703 | return; | |
704 | } | |
705 | } | |
706 | __list_add(&chunk->list, left, left->next); | |
707 | } | |
708 | ||
709 | /* | |
710 | * Check if bsize is in { 512, 1024, 2048, 4096 } | |
711 | */ | |
712 | static inline int | |
713 | dasd_check_blocksize(int bsize) | |
714 | { | |
e108cebb | 715 | if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize)) |
1da177e4 LT |
716 | return -EMEDIUMTYPE; |
717 | return 0; | |
718 | } | |
719 | ||
720 | /* externals in dasd.c */ | |
4fa52aa7 SW |
721 | #define DASD_PROFILE_OFF 0 |
722 | #define DASD_PROFILE_ON 1 | |
723 | #define DASD_PROFILE_GLOBAL_ONLY 2 | |
1da177e4 LT |
724 | |
725 | extern debug_info_t *dasd_debug_area; | |
8ea55c95 | 726 | extern struct dasd_profile dasd_global_profile; |
4fa52aa7 | 727 | extern unsigned int dasd_global_profile_level; |
83d5cde4 | 728 | extern const struct block_device_operations dasd_device_operations; |
1da177e4 | 729 | |
e18b890b | 730 | extern struct kmem_cache *dasd_page_cache; |
1da177e4 LT |
731 | |
732 | struct dasd_ccw_req * | |
68b781fe | 733 | dasd_kmalloc_request(int , int, int, struct dasd_device *); |
1da177e4 | 734 | struct dasd_ccw_req * |
68b781fe | 735 | dasd_smalloc_request(int , int, int, struct dasd_device *); |
1da177e4 LT |
736 | void dasd_kfree_request(struct dasd_ccw_req *, struct dasd_device *); |
737 | void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *); | |
5915a873 | 738 | void dasd_wakeup_cb(struct dasd_ccw_req *, void *); |
1da177e4 LT |
739 | |
740 | static inline int | |
741 | dasd_kmalloc_set_cda(struct ccw1 *ccw, void *cda, struct dasd_device *device) | |
742 | { | |
743 | return set_normalized_cda(ccw, cda); | |
744 | } | |
745 | ||
746 | struct dasd_device *dasd_alloc_device(void); | |
747 | void dasd_free_device(struct dasd_device *); | |
748 | ||
8e09f215 SW |
749 | struct dasd_block *dasd_alloc_block(void); |
750 | void dasd_free_block(struct dasd_block *); | |
751 | ||
e443343e | 752 | enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved); |
3d71ad32 | 753 | |
1da177e4 LT |
754 | void dasd_enable_device(struct dasd_device *); |
755 | void dasd_set_target_state(struct dasd_device *, int); | |
756 | void dasd_kick_device(struct dasd_device *); | |
d41dd122 | 757 | void dasd_restore_device(struct dasd_device *); |
501183f2 | 758 | void dasd_reload_device(struct dasd_device *); |
a521b048 | 759 | void dasd_schedule_requeue(struct dasd_device *); |
1da177e4 LT |
760 | |
761 | void dasd_add_request_head(struct dasd_ccw_req *); | |
762 | void dasd_add_request_tail(struct dasd_ccw_req *); | |
763 | int dasd_start_IO(struct dasd_ccw_req *); | |
764 | int dasd_term_IO(struct dasd_ccw_req *); | |
8e09f215 SW |
765 | void dasd_schedule_device_bh(struct dasd_device *); |
766 | void dasd_schedule_block_bh(struct dasd_block *); | |
1da177e4 | 767 | int dasd_sleep_on(struct dasd_ccw_req *); |
d42e1712 | 768 | int dasd_sleep_on_queue(struct list_head *); |
1da177e4 LT |
769 | int dasd_sleep_on_immediatly(struct dasd_ccw_req *); |
770 | int dasd_sleep_on_interruptible(struct dasd_ccw_req *); | |
8e09f215 SW |
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 *); | |
1da177e4 | 775 | int dasd_cancel_req(struct dasd_ccw_req *); |
8e09f215 | 776 | int dasd_flush_device_queue(struct dasd_device *); |
1da177e4 | 777 | int dasd_generic_probe (struct ccw_device *, struct dasd_discipline *); |
c020d722 | 778 | void dasd_generic_free_discipline(struct dasd_device *); |
1da177e4 LT |
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); | |
a4d26c6a SW |
783 | int dasd_generic_last_path_gone(struct dasd_device *); |
784 | int dasd_generic_path_operational(struct dasd_device *); | |
4679e893 | 785 | void dasd_generic_shutdown(struct ccw_device *); |
a4d26c6a | 786 | |
8e09f215 | 787 | void dasd_generic_handle_state_change(struct dasd_device *); |
d41dd122 SH |
788 | int dasd_generic_pm_freeze(struct ccw_device *); |
789 | int dasd_generic_restore_device(struct ccw_device *); | |
a23ed009 | 790 | enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *); |
a4d26c6a SW |
791 | void dasd_generic_path_event(struct ccw_device *, int *); |
792 | int dasd_generic_verify_path(struct dasd_device *, __u8); | |
1da177e4 | 793 | |
68b781fe | 794 | int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int); |
f3eb5384 | 795 | char *dasd_get_sense(struct irb *); |
17283b56 | 796 | |
eb6e199b SW |
797 | void dasd_device_set_stop_bits(struct dasd_device *, int); |
798 | void dasd_device_remove_stop_bits(struct dasd_device *, int); | |
799 | ||
33b62a30 SW |
800 | int dasd_device_is_ro(struct dasd_device *); |
801 | ||
4fa52aa7 SW |
802 | void dasd_profile_reset(struct dasd_profile *); |
803 | int dasd_profile_on(struct dasd_profile *); | |
804 | void dasd_profile_off(struct dasd_profile *); | |
4fa52aa7 | 805 | char *dasd_get_user_string(const char __user *, size_t); |
33b62a30 | 806 | |
1da177e4 LT |
807 | /* externals in dasd_devmap.c */ |
808 | extern int dasd_max_devindex; | |
809 | extern int dasd_probeonly; | |
810 | extern int dasd_autodetect; | |
40545573 | 811 | extern int dasd_nopav; |
f3eb5384 | 812 | extern int dasd_nofcx; |
1da177e4 LT |
813 | |
814 | int dasd_devmap_init(void); | |
815 | void dasd_devmap_exit(void); | |
816 | ||
817 | struct dasd_device *dasd_create_device(struct ccw_device *); | |
818 | void dasd_delete_device(struct dasd_device *); | |
819 | ||
f24acd45 HH |
820 | int dasd_get_feature(struct ccw_device *, int); |
821 | int dasd_set_feature(struct ccw_device *, int, int); | |
822 | ||
1da177e4 LT |
823 | int dasd_add_sysfs_files(struct ccw_device *); |
824 | void dasd_remove_sysfs_files(struct ccw_device *); | |
825 | ||
826 | struct dasd_device *dasd_device_from_cdev(struct ccw_device *); | |
a00bfd71 | 827 | struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *); |
1da177e4 LT |
828 | struct dasd_device *dasd_device_from_devindex(int); |
829 | ||
65f8da47 SW |
830 | void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *); |
831 | struct dasd_device *dasd_device_from_gendisk(struct gendisk *); | |
832 | ||
3b1bea01 | 833 | int dasd_parse(void) __init; |
69f90f6a | 834 | int dasd_busid_known(const char *); |
1da177e4 LT |
835 | |
836 | /* externals in dasd_gendisk.c */ | |
837 | int dasd_gendisk_init(void); | |
838 | void dasd_gendisk_exit(void); | |
8e09f215 SW |
839 | int dasd_gendisk_alloc(struct dasd_block *); |
840 | void dasd_gendisk_free(struct dasd_block *); | |
841 | int dasd_scan_partitions(struct dasd_block *); | |
842 | void dasd_destroy_partitions(struct dasd_block *); | |
1da177e4 LT |
843 | |
844 | /* externals in dasd_ioctl.c */ | |
57a7c0bc | 845 | int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long); |
1da177e4 LT |
846 | |
847 | /* externals in dasd_proc.c */ | |
848 | int dasd_proc_init(void); | |
849 | void dasd_proc_exit(void); | |
850 | ||
851 | /* externals in dasd_erp.c */ | |
852 | struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *); | |
853 | struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *); | |
854 | struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int, | |
855 | struct dasd_device *); | |
856 | void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *); | |
857 | void dasd_log_sense(struct dasd_ccw_req *, struct irb *); | |
fc19f381 | 858 | void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb); |
1da177e4 | 859 | |
1da177e4 | 860 | /* externals in dasd_3990_erp.c */ |
1da177e4 | 861 | struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *); |
f60c768c | 862 | void dasd_3990_erp_handle_sim(struct dasd_device *, char *); |
1da177e4 | 863 | |
20c64468 SW |
864 | /* externals in dasd_eer.c */ |
865 | #ifdef CONFIG_DASD_EER | |
866 | int dasd_eer_init(void); | |
867 | void dasd_eer_exit(void); | |
868 | int dasd_eer_enable(struct dasd_device *); | |
869 | void dasd_eer_disable(struct dasd_device *); | |
870 | void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr, | |
871 | unsigned int id); | |
872 | void dasd_eer_snss(struct dasd_device *); | |
873 | ||
874 | static inline int dasd_eer_enabled(struct dasd_device *device) | |
875 | { | |
876 | return device->eer_cqr != NULL; | |
877 | } | |
878 | #else | |
879 | #define dasd_eer_init() (0) | |
880 | #define dasd_eer_exit() do { } while (0) | |
881 | #define dasd_eer_enable(d) (0) | |
882 | #define dasd_eer_disable(d) do { } while (0) | |
883 | #define dasd_eer_write(d,c,i) do { } while (0) | |
884 | #define dasd_eer_snss(d) do { } while (0) | |
885 | #define dasd_eer_enabled(d) (0) | |
886 | #endif /* CONFIG_DASD_ERR */ | |
887 | ||
c9346151 SH |
888 | |
889 | /* DASD path handling functions */ | |
890 | ||
891 | /* | |
892 | * helper functions to modify bit masks for a given channel path for a device | |
893 | */ | |
894 | static inline int dasd_path_is_operational(struct dasd_device *device, int chp) | |
895 | { | |
896 | return test_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); | |
897 | } | |
898 | ||
899 | static inline int dasd_path_need_verify(struct dasd_device *device, int chp) | |
900 | { | |
901 | return test_bit(DASD_PATH_TBV, &device->path[chp].flags); | |
902 | } | |
903 | ||
904 | static inline void dasd_path_verify(struct dasd_device *device, int chp) | |
905 | { | |
906 | __set_bit(DASD_PATH_TBV, &device->path[chp].flags); | |
907 | } | |
908 | ||
909 | static inline void dasd_path_clear_verify(struct dasd_device *device, int chp) | |
910 | { | |
911 | __clear_bit(DASD_PATH_TBV, &device->path[chp].flags); | |
912 | } | |
913 | ||
914 | static inline void dasd_path_clear_all_verify(struct dasd_device *device) | |
915 | { | |
916 | int chp; | |
917 | ||
918 | for (chp = 0; chp < 8; chp++) | |
919 | dasd_path_clear_verify(device, chp); | |
920 | } | |
921 | ||
922 | static inline void dasd_path_operational(struct dasd_device *device, int chp) | |
923 | { | |
924 | __set_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); | |
925 | device->opm |= (0x80 >> chp); | |
926 | } | |
927 | ||
928 | static inline void dasd_path_nonpreferred(struct dasd_device *device, int chp) | |
929 | { | |
930 | __set_bit(DASD_PATH_NPP, &device->path[chp].flags); | |
931 | } | |
932 | ||
933 | static inline int dasd_path_is_nonpreferred(struct dasd_device *device, int chp) | |
934 | { | |
935 | return test_bit(DASD_PATH_NPP, &device->path[chp].flags); | |
936 | } | |
937 | ||
938 | static inline void dasd_path_clear_nonpreferred(struct dasd_device *device, | |
939 | int chp) | |
940 | { | |
941 | __clear_bit(DASD_PATH_NPP, &device->path[chp].flags); | |
942 | } | |
943 | ||
944 | static inline void dasd_path_preferred(struct dasd_device *device, int chp) | |
945 | { | |
946 | __set_bit(DASD_PATH_PP, &device->path[chp].flags); | |
947 | } | |
948 | ||
949 | static inline int dasd_path_is_preferred(struct dasd_device *device, int chp) | |
950 | { | |
951 | return test_bit(DASD_PATH_PP, &device->path[chp].flags); | |
952 | } | |
953 | ||
954 | static inline void dasd_path_clear_preferred(struct dasd_device *device, | |
955 | int chp) | |
956 | { | |
957 | __clear_bit(DASD_PATH_PP, &device->path[chp].flags); | |
958 | } | |
959 | ||
960 | static inline void dasd_path_clear_oper(struct dasd_device *device, int chp) | |
961 | { | |
962 | __clear_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); | |
963 | device->opm &= ~(0x80 >> chp); | |
964 | } | |
965 | ||
966 | static inline void dasd_path_clear_cable(struct dasd_device *device, int chp) | |
967 | { | |
968 | __clear_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); | |
969 | } | |
970 | ||
971 | static inline void dasd_path_cuir(struct dasd_device *device, int chp) | |
972 | { | |
973 | __set_bit(DASD_PATH_CUIR, &device->path[chp].flags); | |
974 | } | |
975 | ||
976 | static inline int dasd_path_is_cuir(struct dasd_device *device, int chp) | |
977 | { | |
978 | return test_bit(DASD_PATH_CUIR, &device->path[chp].flags); | |
979 | } | |
980 | ||
981 | static inline void dasd_path_clear_cuir(struct dasd_device *device, int chp) | |
982 | { | |
983 | __clear_bit(DASD_PATH_CUIR, &device->path[chp].flags); | |
984 | } | |
985 | ||
a521b048 SH |
986 | static inline void dasd_path_ifcc(struct dasd_device *device, int chp) |
987 | { | |
988 | set_bit(DASD_PATH_IFCC, &device->path[chp].flags); | |
989 | } | |
990 | ||
991 | static inline int dasd_path_is_ifcc(struct dasd_device *device, int chp) | |
992 | { | |
993 | return test_bit(DASD_PATH_IFCC, &device->path[chp].flags); | |
994 | } | |
995 | ||
996 | static inline void dasd_path_clear_ifcc(struct dasd_device *device, int chp) | |
997 | { | |
998 | clear_bit(DASD_PATH_IFCC, &device->path[chp].flags); | |
999 | } | |
1000 | ||
c9346151 SH |
1001 | static inline void dasd_path_clear_nohpf(struct dasd_device *device, int chp) |
1002 | { | |
1003 | __clear_bit(DASD_PATH_NOHPF, &device->path[chp].flags); | |
1004 | } | |
1005 | ||
1006 | static inline void dasd_path_miscabled(struct dasd_device *device, int chp) | |
1007 | { | |
1008 | __set_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); | |
1009 | } | |
1010 | ||
1011 | static inline int dasd_path_is_miscabled(struct dasd_device *device, int chp) | |
1012 | { | |
1013 | return test_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); | |
1014 | } | |
1015 | ||
1016 | static inline void dasd_path_nohpf(struct dasd_device *device, int chp) | |
1017 | { | |
1018 | __set_bit(DASD_PATH_NOHPF, &device->path[chp].flags); | |
1019 | } | |
1020 | ||
1021 | static inline int dasd_path_is_nohpf(struct dasd_device *device, int chp) | |
1022 | { | |
1023 | return test_bit(DASD_PATH_NOHPF, &device->path[chp].flags); | |
1024 | } | |
1025 | ||
1026 | /* | |
1027 | * get functions for path masks | |
1028 | * will return a path masks for the given device | |
1029 | */ | |
1030 | ||
1031 | static inline __u8 dasd_path_get_opm(struct dasd_device *device) | |
1032 | { | |
1033 | return device->opm; | |
1034 | } | |
1035 | ||
1036 | static inline __u8 dasd_path_get_tbvpm(struct dasd_device *device) | |
1037 | { | |
1038 | int chp; | |
1039 | __u8 tbvpm = 0x00; | |
1040 | ||
1041 | for (chp = 0; chp < 8; chp++) | |
1042 | if (dasd_path_need_verify(device, chp)) | |
1043 | tbvpm |= 0x80 >> chp; | |
1044 | return tbvpm; | |
1045 | } | |
1046 | ||
1047 | static inline __u8 dasd_path_get_nppm(struct dasd_device *device) | |
1048 | { | |
1049 | int chp; | |
1050 | __u8 npm = 0x00; | |
1051 | ||
1052 | for (chp = 0; chp < 8; chp++) { | |
1053 | if (dasd_path_is_nonpreferred(device, chp)) | |
1054 | npm |= 0x80 >> chp; | |
1055 | } | |
1056 | return npm; | |
1057 | } | |
1058 | ||
1059 | static inline __u8 dasd_path_get_ppm(struct dasd_device *device) | |
1060 | { | |
1061 | int chp; | |
1062 | __u8 ppm = 0x00; | |
1063 | ||
1064 | for (chp = 0; chp < 8; chp++) | |
1065 | if (dasd_path_is_preferred(device, chp)) | |
1066 | ppm |= 0x80 >> chp; | |
1067 | return ppm; | |
1068 | } | |
1069 | ||
1070 | static inline __u8 dasd_path_get_cablepm(struct dasd_device *device) | |
1071 | { | |
1072 | int chp; | |
1073 | __u8 cablepm = 0x00; | |
1074 | ||
1075 | for (chp = 0; chp < 8; chp++) | |
1076 | if (dasd_path_is_miscabled(device, chp)) | |
1077 | cablepm |= 0x80 >> chp; | |
1078 | return cablepm; | |
1079 | } | |
1080 | ||
1081 | static inline __u8 dasd_path_get_cuirpm(struct dasd_device *device) | |
1082 | { | |
1083 | int chp; | |
1084 | __u8 cuirpm = 0x00; | |
1085 | ||
1086 | for (chp = 0; chp < 8; chp++) | |
1087 | if (dasd_path_is_cuir(device, chp)) | |
1088 | cuirpm |= 0x80 >> chp; | |
1089 | return cuirpm; | |
1090 | } | |
1091 | ||
a521b048 SH |
1092 | static inline __u8 dasd_path_get_ifccpm(struct dasd_device *device) |
1093 | { | |
1094 | int chp; | |
1095 | __u8 ifccpm = 0x00; | |
1096 | ||
1097 | for (chp = 0; chp < 8; chp++) | |
1098 | if (dasd_path_is_ifcc(device, chp)) | |
1099 | ifccpm |= 0x80 >> chp; | |
1100 | return ifccpm; | |
1101 | } | |
1102 | ||
c9346151 SH |
1103 | static inline __u8 dasd_path_get_hpfpm(struct dasd_device *device) |
1104 | { | |
1105 | int chp; | |
1106 | __u8 hpfpm = 0x00; | |
1107 | ||
1108 | for (chp = 0; chp < 8; chp++) | |
1109 | if (dasd_path_is_nohpf(device, chp)) | |
1110 | hpfpm |= 0x80 >> chp; | |
1111 | return hpfpm; | |
1112 | } | |
1113 | ||
1114 | /* | |
1115 | * add functions for path masks | |
1116 | * the existing path mask will be extended by the given path mask | |
1117 | */ | |
1118 | static inline void dasd_path_add_tbvpm(struct dasd_device *device, __u8 pm) | |
1119 | { | |
1120 | int chp; | |
1121 | ||
1122 | for (chp = 0; chp < 8; chp++) | |
1123 | if (pm & (0x80 >> chp)) | |
1124 | dasd_path_verify(device, chp); | |
1125 | } | |
1126 | ||
a521b048 SH |
1127 | static inline __u8 dasd_path_get_notoperpm(struct dasd_device *device) |
1128 | { | |
1129 | int chp; | |
1130 | __u8 nopm = 0x00; | |
1131 | ||
1132 | for (chp = 0; chp < 8; chp++) | |
1133 | if (dasd_path_is_nohpf(device, chp) || | |
1134 | dasd_path_is_ifcc(device, chp) || | |
1135 | dasd_path_is_cuir(device, chp) || | |
1136 | dasd_path_is_miscabled(device, chp)) | |
1137 | nopm |= 0x80 >> chp; | |
1138 | return nopm; | |
1139 | } | |
1140 | ||
c9346151 SH |
1141 | static inline void dasd_path_add_opm(struct dasd_device *device, __u8 pm) |
1142 | { | |
1143 | int chp; | |
1144 | ||
1145 | for (chp = 0; chp < 8; chp++) | |
1146 | if (pm & (0x80 >> chp)) { | |
1147 | dasd_path_operational(device, chp); | |
1148 | /* | |
1149 | * if the path is used | |
1150 | * it should not be in one of the negative lists | |
1151 | */ | |
1152 | dasd_path_clear_nohpf(device, chp); | |
1153 | dasd_path_clear_cuir(device, chp); | |
1154 | dasd_path_clear_cable(device, chp); | |
a521b048 | 1155 | dasd_path_clear_ifcc(device, chp); |
c9346151 SH |
1156 | } |
1157 | } | |
1158 | ||
1159 | static inline void dasd_path_add_cablepm(struct dasd_device *device, __u8 pm) | |
1160 | { | |
1161 | int chp; | |
1162 | ||
1163 | for (chp = 0; chp < 8; chp++) | |
1164 | if (pm & (0x80 >> chp)) | |
1165 | dasd_path_miscabled(device, chp); | |
1166 | } | |
1167 | ||
1168 | static inline void dasd_path_add_cuirpm(struct dasd_device *device, __u8 pm) | |
1169 | { | |
1170 | int chp; | |
1171 | ||
1172 | for (chp = 0; chp < 8; chp++) | |
1173 | if (pm & (0x80 >> chp)) | |
1174 | dasd_path_cuir(device, chp); | |
1175 | } | |
1176 | ||
a521b048 SH |
1177 | static inline void dasd_path_add_ifccpm(struct dasd_device *device, __u8 pm) |
1178 | { | |
1179 | int chp; | |
1180 | ||
1181 | for (chp = 0; chp < 8; chp++) | |
1182 | if (pm & (0x80 >> chp)) | |
1183 | dasd_path_ifcc(device, chp); | |
1184 | } | |
1185 | ||
c9346151 SH |
1186 | static inline void dasd_path_add_nppm(struct dasd_device *device, __u8 pm) |
1187 | { | |
1188 | int chp; | |
1189 | ||
1190 | for (chp = 0; chp < 8; chp++) | |
1191 | if (pm & (0x80 >> chp)) | |
1192 | dasd_path_nonpreferred(device, chp); | |
1193 | } | |
1194 | ||
1195 | static inline void dasd_path_add_nohpfpm(struct dasd_device *device, __u8 pm) | |
1196 | { | |
1197 | int chp; | |
1198 | ||
1199 | for (chp = 0; chp < 8; chp++) | |
1200 | if (pm & (0x80 >> chp)) | |
1201 | dasd_path_nohpf(device, chp); | |
1202 | } | |
1203 | ||
1204 | static inline void dasd_path_add_ppm(struct dasd_device *device, __u8 pm) | |
1205 | { | |
1206 | int chp; | |
1207 | ||
1208 | for (chp = 0; chp < 8; chp++) | |
1209 | if (pm & (0x80 >> chp)) | |
1210 | dasd_path_preferred(device, chp); | |
1211 | } | |
1212 | ||
1213 | /* | |
1214 | * set functions for path masks | |
1215 | * the existing path mask will be replaced by the given path mask | |
1216 | */ | |
1217 | static inline void dasd_path_set_tbvpm(struct dasd_device *device, __u8 pm) | |
1218 | { | |
1219 | int chp; | |
1220 | ||
1221 | for (chp = 0; chp < 8; chp++) | |
1222 | if (pm & (0x80 >> chp)) | |
1223 | dasd_path_verify(device, chp); | |
1224 | else | |
1225 | dasd_path_clear_verify(device, chp); | |
1226 | } | |
1227 | ||
1228 | static inline void dasd_path_set_opm(struct dasd_device *device, __u8 pm) | |
1229 | { | |
1230 | int chp; | |
1231 | ||
1232 | for (chp = 0; chp < 8; chp++) { | |
1233 | dasd_path_clear_oper(device, chp); | |
1234 | if (pm & (0x80 >> chp)) { | |
1235 | dasd_path_operational(device, chp); | |
1236 | /* | |
1237 | * if the path is used | |
1238 | * it should not be in one of the negative lists | |
1239 | */ | |
1240 | dasd_path_clear_nohpf(device, chp); | |
1241 | dasd_path_clear_cuir(device, chp); | |
1242 | dasd_path_clear_cable(device, chp); | |
a521b048 | 1243 | dasd_path_clear_ifcc(device, chp); |
c9346151 SH |
1244 | } |
1245 | } | |
1246 | } | |
1247 | ||
1248 | /* | |
1249 | * remove functions for path masks | |
1250 | * the existing path mask will be cleared with the given path mask | |
1251 | */ | |
1252 | static inline void dasd_path_remove_opm(struct dasd_device *device, __u8 pm) | |
1253 | { | |
1254 | int chp; | |
1255 | ||
1256 | for (chp = 0; chp < 8; chp++) { | |
1257 | if (pm & (0x80 >> chp)) | |
1258 | dasd_path_clear_oper(device, chp); | |
1259 | } | |
1260 | } | |
1261 | ||
1262 | /* | |
1263 | * add the newly available path to the to be verified pm and remove it from | |
1264 | * normal operation until it is verified | |
1265 | */ | |
1266 | static inline void dasd_path_available(struct dasd_device *device, int chp) | |
1267 | { | |
1268 | dasd_path_clear_oper(device, chp); | |
1269 | dasd_path_verify(device, chp); | |
1270 | } | |
1271 | ||
1272 | static inline void dasd_path_notoper(struct dasd_device *device, int chp) | |
1273 | { | |
1274 | dasd_path_clear_oper(device, chp); | |
1275 | dasd_path_clear_preferred(device, chp); | |
1276 | dasd_path_clear_nonpreferred(device, chp); | |
1277 | } | |
1278 | ||
1279 | /* | |
1280 | * remove all paths from normal operation | |
1281 | */ | |
1282 | static inline void dasd_path_no_path(struct dasd_device *device) | |
1283 | { | |
1284 | int chp; | |
1285 | ||
1286 | for (chp = 0; chp < 8; chp++) | |
1287 | dasd_path_notoper(device, chp); | |
1288 | ||
1289 | dasd_path_clear_all_verify(device); | |
1290 | } | |
1291 | ||
1292 | /* end - path handling */ | |
1293 | ||
1da177e4 | 1294 | #endif /* DASD_H */ |