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Commit | Line | Data |
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138c014d | 1 | /* |
1da177e4 | 2 | * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> |
138c014d | 3 | * Horst Hummel <Horst.Hummel@de.ibm.com> |
1da177e4 LT |
4 | * Martin Schwidefsky <schwidefsky@de.ibm.com> |
5 | * Bugreports.to..: <Linux390@de.ibm.com> | |
d41dd122 | 6 | * Copyright IBM Corp. 1999, 2009 |
1da177e4 LT |
7 | */ |
8 | ||
9 | #ifndef DASD_INT_H | |
10 | #define DASD_INT_H | |
11 | ||
1da177e4 LT |
12 | /* we keep old device allocation scheme; IOW, minors are still in 0..255 */ |
13 | #define DASD_PER_MAJOR (1U << (MINORBITS - DASD_PARTN_BITS)) | |
14 | #define DASD_PARTN_MASK ((1 << DASD_PARTN_BITS) - 1) | |
15 | ||
16 | /* | |
17 | * States a dasd device can have: | |
18 | * new: the dasd_device structure is allocated. | |
19 | * known: the discipline for the device is identified. | |
20 | * basic: the device can do basic i/o. | |
90f0094d | 21 | * unfmt: the device could not be analyzed (format is unknown). |
1da177e4 LT |
22 | * ready: partition detection is done and the device is can do block io. |
23 | * online: the device accepts requests from the block device queue. | |
24 | * | |
25 | * Things to do for startup state transitions: | |
26 | * new -> known: find discipline for the device and create devfs entries. | |
27 | * known -> basic: request irq line for the device. | |
28 | * basic -> ready: do the initial analysis, e.g. format detection, | |
29 | * do block device setup and detect partitions. | |
30 | * ready -> online: schedule the device tasklet. | |
31 | * Things to do for shutdown state transitions: | |
32 | * online -> ready: just set the new device state. | |
33 | * ready -> basic: flush requests from the block device layer, clear | |
34 | * partition information and reset format information. | |
35 | * basic -> known: terminate all requests and free irq. | |
36 | * known -> new: remove devfs entries and forget discipline. | |
37 | */ | |
38 | ||
39 | #define DASD_STATE_NEW 0 | |
40 | #define DASD_STATE_KNOWN 1 | |
41 | #define DASD_STATE_BASIC 2 | |
90f0094d HH |
42 | #define DASD_STATE_UNFMT 3 |
43 | #define DASD_STATE_READY 4 | |
44 | #define DASD_STATE_ONLINE 5 | |
1da177e4 LT |
45 | |
46 | #include <linux/module.h> | |
47 | #include <linux/wait.h> | |
48 | #include <linux/blkdev.h> | |
1da177e4 LT |
49 | #include <linux/genhd.h> |
50 | #include <linux/hdreg.h> | |
51 | #include <linux/interrupt.h> | |
e108cebb | 52 | #include <linux/log2.h> |
1da177e4 LT |
53 | #include <asm/ccwdev.h> |
54 | #include <linux/workqueue.h> | |
55 | #include <asm/debug.h> | |
56 | #include <asm/dasd.h> | |
57 | #include <asm/idals.h> | |
c9346151 | 58 | #include <linux/bitops.h> |
e443343e | 59 | #include <linux/blk-mq.h> |
1da177e4 | 60 | |
68b781fe SH |
61 | /* DASD discipline magic */ |
62 | #define DASD_ECKD_MAGIC 0xC5C3D2C4 | |
63 | #define DASD_DIAG_MAGIC 0xC4C9C1C7 | |
64 | #define DASD_FBA_MAGIC 0xC6C2C140 | |
65 | ||
1da177e4 LT |
66 | /* |
67 | * SECTION: Type definitions | |
68 | */ | |
69 | struct dasd_device; | |
8e09f215 | 70 | struct dasd_block; |
1da177e4 LT |
71 | |
72 | /* BIT DEFINITIONS FOR SENSE DATA */ | |
73 | #define DASD_SENSE_BIT_0 0x80 | |
74 | #define DASD_SENSE_BIT_1 0x40 | |
75 | #define DASD_SENSE_BIT_2 0x20 | |
76 | #define DASD_SENSE_BIT_3 0x10 | |
77 | ||
f60c768c SH |
78 | /* BIT DEFINITIONS FOR SIM SENSE */ |
79 | #define DASD_SIM_SENSE 0x0F | |
80 | #define DASD_SIM_MSG_TO_OP 0x03 | |
81 | #define DASD_SIM_LOG 0x0C | |
82 | ||
2dedf0d9 SH |
83 | /* lock class for nested cdev lock */ |
84 | #define CDEV_NESTED_FIRST 1 | |
85 | #define CDEV_NESTED_SECOND 2 | |
86 | ||
1da177e4 LT |
87 | /* |
88 | * SECTION: MACROs for klogd and s390 debug feature (dbf) | |
89 | */ | |
90 | #define DBF_DEV_EVENT(d_level, d_device, d_str, d_data...) \ | |
91 | do { \ | |
92 | debug_sprintf_event(d_device->debug_area, \ | |
93 | d_level, \ | |
94 | d_str "\n", \ | |
95 | d_data); \ | |
96 | } while(0) | |
97 | ||
98 | #define DBF_DEV_EXC(d_level, d_device, d_str, d_data...) \ | |
99 | do { \ | |
100 | debug_sprintf_exception(d_device->debug_area, \ | |
101 | d_level, \ | |
102 | d_str "\n", \ | |
103 | d_data); \ | |
104 | } while(0) | |
105 | ||
106 | #define DBF_EVENT(d_level, d_str, d_data...)\ | |
107 | do { \ | |
108 | debug_sprintf_event(dasd_debug_area, \ | |
109 | d_level,\ | |
110 | d_str "\n", \ | |
111 | d_data); \ | |
112 | } while(0) | |
113 | ||
b8ed5dd5 SH |
114 | #define DBF_EVENT_DEVID(d_level, d_cdev, d_str, d_data...) \ |
115 | do { \ | |
116 | struct ccw_dev_id __dev_id; \ | |
117 | ccw_device_get_id(d_cdev, &__dev_id); \ | |
118 | debug_sprintf_event(dasd_debug_area, \ | |
119 | d_level, \ | |
120 | "0.%x.%04x " d_str "\n", \ | |
121 | __dev_id.ssid, __dev_id.devno, d_data); \ | |
122 | } while (0) | |
123 | ||
1da177e4 LT |
124 | #define DBF_EXC(d_level, d_str, d_data...)\ |
125 | do { \ | |
126 | debug_sprintf_exception(dasd_debug_area, \ | |
127 | d_level,\ | |
128 | d_str "\n", \ | |
129 | d_data); \ | |
130 | } while(0) | |
131 | ||
fc19f381 SH |
132 | /* limit size for an errorstring */ |
133 | #define ERRORLENGTH 30 | |
134 | ||
1da177e4 LT |
135 | /* definition of dbf debug levels */ |
136 | #define DBF_EMERG 0 /* system is unusable */ | |
137 | #define DBF_ALERT 1 /* action must be taken immediately */ | |
138 | #define DBF_CRIT 2 /* critical conditions */ | |
139 | #define DBF_ERR 3 /* error conditions */ | |
140 | #define DBF_WARNING 4 /* warning conditions */ | |
141 | #define DBF_NOTICE 5 /* normal but significant condition */ | |
142 | #define DBF_INFO 6 /* informational */ | |
143 | #define DBF_DEBUG 6 /* debug-level messages */ | |
144 | ||
145 | /* messages to be written via klogd and dbf */ | |
146 | #define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\ | |
147 | do { \ | |
148 | printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \ | |
2a0217d5 | 149 | dev_name(&d_device->cdev->dev), d_args); \ |
1da177e4 LT |
150 | DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \ |
151 | } while(0) | |
152 | ||
153 | #define MESSAGE(d_loglevel,d_string,d_args...)\ | |
154 | do { \ | |
155 | printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \ | |
156 | DBF_EVENT(DBF_ALERT, d_string, d_args); \ | |
157 | } while(0) | |
158 | ||
159 | /* messages to be written via klogd only */ | |
160 | #define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\ | |
161 | do { \ | |
162 | printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \ | |
2a0217d5 | 163 | dev_name(&d_device->cdev->dev), d_args); \ |
1da177e4 LT |
164 | } while(0) |
165 | ||
166 | #define MESSAGE_LOG(d_loglevel,d_string,d_args...)\ | |
167 | do { \ | |
168 | printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \ | |
169 | } while(0) | |
170 | ||
28b841b3 JH |
171 | /* Macro to calculate number of blocks per page */ |
172 | #define BLOCKS_PER_PAGE(blksize) (PAGE_SIZE / blksize) | |
173 | ||
1da177e4 LT |
174 | struct dasd_ccw_req { |
175 | unsigned int magic; /* Eye catcher */ | |
8e09f215 SW |
176 | struct list_head devlist; /* for dasd_device request queue */ |
177 | struct list_head blocklist; /* for dasd_block request queue */ | |
1da177e4 LT |
178 | |
179 | /* Where to execute what... */ | |
8e09f215 SW |
180 | struct dasd_block *block; /* the originating block device */ |
181 | struct dasd_device *memdev; /* the device used to allocate this */ | |
182 | struct dasd_device *startdev; /* device the request is started on */ | |
29b8dd9d | 183 | struct dasd_device *basedev; /* base device if no block->base */ |
f3eb5384 SW |
184 | void *cpaddr; /* address of ccw or tcw */ |
185 | unsigned char cpmode; /* 0 = cmd mode, 1 = itcw */ | |
8e09f215 | 186 | char status; /* status of this request */ |
1da177e4 LT |
187 | short retries; /* A retry counter */ |
188 | unsigned long flags; /* flags of this request */ | |
e443343e | 189 | struct dasd_queue *dq; |
1da177e4 LT |
190 | |
191 | /* ... and how */ | |
192 | unsigned long starttime; /* jiffies time of request start */ | |
7c8faa86 | 193 | unsigned long expires; /* expiration period in jiffies */ |
8e09f215 | 194 | char lpm; /* logical path mask */ |
1da177e4 LT |
195 | void *data; /* pointer to data area */ |
196 | ||
197 | /* these are important for recovering erroneous requests */ | |
6cc7f168 | 198 | int intrc; /* internal error, e.g. from start_IO */ |
1da177e4 LT |
199 | struct irb irb; /* device status in case of an error */ |
200 | struct dasd_ccw_req *refers; /* ERP-chain queueing. */ | |
201 | void *function; /* originating ERP action */ | |
202 | ||
203 | /* these are for statistics only */ | |
7bf76f01 JH |
204 | unsigned long buildclk; /* TOD-clock of request generation */ |
205 | unsigned long startclk; /* TOD-clock of request start */ | |
206 | unsigned long stopclk; /* TOD-clock of request interrupt */ | |
207 | unsigned long endclk; /* TOD-clock of request termination */ | |
1da177e4 LT |
208 | |
209 | /* Callback that is called after reaching final status. */ | |
8e09f215 SW |
210 | void (*callback)(struct dasd_ccw_req *, void *data); |
211 | void *callback_data; | |
1da177e4 LT |
212 | }; |
213 | ||
138c014d | 214 | /* |
1da177e4 LT |
215 | * dasd_ccw_req -> status can be: |
216 | */ | |
8e09f215 SW |
217 | #define DASD_CQR_FILLED 0x00 /* request is ready to be processed */ |
218 | #define DASD_CQR_DONE 0x01 /* request is completed successfully */ | |
219 | #define DASD_CQR_NEED_ERP 0x02 /* request needs recovery action */ | |
220 | #define DASD_CQR_IN_ERP 0x03 /* request is in recovery */ | |
221 | #define DASD_CQR_FAILED 0x04 /* request is finally failed */ | |
222 | #define DASD_CQR_TERMINATED 0x05 /* request was stopped by driver */ | |
223 | ||
224 | #define DASD_CQR_QUEUED 0x80 /* request is queued to be processed */ | |
225 | #define DASD_CQR_IN_IO 0x81 /* request is currently in IO */ | |
226 | #define DASD_CQR_ERROR 0x82 /* request is completed with error */ | |
227 | #define DASD_CQR_CLEAR_PENDING 0x83 /* request is clear pending */ | |
228 | #define DASD_CQR_CLEARED 0x84 /* request was cleared */ | |
73ac36ea | 229 | #define DASD_CQR_SUCCESS 0x85 /* request was successful */ |
8e09f215 | 230 | |
7c8faa86 SH |
231 | /* default expiration time*/ |
232 | #define DASD_EXPIRES 300 | |
233 | #define DASD_EXPIRES_MAX 40000000 | |
1f1ee9ad HR |
234 | #define DASD_RETRIES 256 |
235 | #define DASD_RETRIES_MAX 32768 | |
1da177e4 LT |
236 | |
237 | /* per dasd_ccw_req flags */ | |
238 | #define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */ | |
1c01b8a5 | 239 | #define DASD_CQR_FLAGS_FAILFAST 1 /* FAILFAST */ |
a4d26c6a | 240 | #define DASD_CQR_VERIFY_PATH 2 /* path verification request */ |
5a27e60d SW |
241 | #define DASD_CQR_ALLOW_SLOCK 3 /* Try this request even when lock was |
242 | * stolen. Should not be combined with | |
243 | * DASD_CQR_FLAGS_USE_ERP | |
244 | */ | |
8fd57520 JH |
245 | /* |
246 | * The following flags are used to suppress output of certain errors. | |
8fd57520 JH |
247 | */ |
248 | #define DASD_CQR_SUPPRESS_NRF 4 /* Suppress 'No Record Found' error */ | |
249 | #define DASD_CQR_SUPPRESS_FP 5 /* Suppress 'File Protected' error*/ | |
250 | #define DASD_CQR_SUPPRESS_IL 6 /* Suppress 'Incorrect Length' error */ | |
ab24fbd3 | 251 | #define DASD_CQR_SUPPRESS_CR 7 /* Suppress 'Command Reject' error */ |
1da177e4 | 252 | |
e443343e SH |
253 | /* |
254 | * There is no reliable way to determine the number of available CPUs on | |
255 | * LPAR but there is no big performance difference between 1 and the | |
256 | * maximum CPU number. | |
257 | * 64 is a good trade off performance wise. | |
258 | */ | |
259 | #define DASD_NR_HW_QUEUES 64 | |
260 | #define DASD_MAX_LCU_DEV 256 | |
261 | #define DASD_REQ_PER_DEV 4 | |
262 | ||
1da177e4 LT |
263 | /* Signature for error recovery functions. */ |
264 | typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *); | |
265 | ||
46d1c03c JH |
266 | /* |
267 | * A single CQR can only contain a maximum of 255 CCWs. It is limited by | |
268 | * the locate record and locate record extended count value which can only hold | |
269 | * 1 Byte max. | |
270 | */ | |
271 | #define DASD_CQR_MAX_CCW 255 | |
272 | ||
2dedf0d9 SH |
273 | /* |
274 | * Unique identifier for dasd device. | |
275 | */ | |
276 | #define UA_NOT_CONFIGURED 0x00 | |
277 | #define UA_BASE_DEVICE 0x01 | |
278 | #define UA_BASE_PAV_ALIAS 0x02 | |
279 | #define UA_HYPER_PAV_ALIAS 0x03 | |
280 | ||
281 | struct dasd_uid { | |
282 | __u8 type; | |
283 | char vendor[4]; | |
284 | char serial[15]; | |
285 | __u16 ssid; | |
286 | __u8 real_unit_addr; | |
287 | __u8 base_unit_addr; | |
288 | char vduit[33]; | |
289 | }; | |
290 | ||
1da177e4 LT |
291 | /* |
292 | * the struct dasd_discipline is | |
293 | * sth like a table of virtual functions, if you think of dasd_eckd | |
294 | * inheriting dasd... | |
295 | * no, currently we are not planning to reimplement the driver in C++ | |
296 | */ | |
297 | struct dasd_discipline { | |
298 | struct module *owner; | |
299 | char ebcname[8]; /* a name used for tagging and printks */ | |
300 | char name[8]; /* a name used for tagging and printks */ | |
301 | int max_blocks; /* maximum number of blocks to be chained */ | |
302 | ||
303 | struct list_head list; /* used for list of disciplines */ | |
304 | ||
8e09f215 SW |
305 | /* |
306 | * Device recognition functions. check_device is used to verify | |
307 | * the sense data and the information returned by read device | |
308 | * characteristics. It returns 0 if the discipline can be used | |
309 | * for the device in question. uncheck_device is called during | |
310 | * device shutdown to deregister a device from its discipline. | |
311 | */ | |
312 | int (*check_device) (struct dasd_device *); | |
313 | void (*uncheck_device) (struct dasd_device *); | |
314 | ||
315 | /* | |
316 | * do_analysis is used in the step from device state "basic" to | |
317 | * state "accept". It returns 0 if the device can be made ready, | |
318 | * it returns -EMEDIUMTYPE if the device can't be made ready or | |
319 | * -EAGAIN if do_analysis started a ccw that needs to complete | |
320 | * before the analysis may be repeated. | |
321 | */ | |
322 | int (*do_analysis) (struct dasd_block *); | |
323 | ||
a4d26c6a SW |
324 | /* |
325 | * This function is called, when new paths become available. | |
326 | * Disciplins may use this callback to do necessary setup work, | |
327 | * e.g. verify that new path is compatible with the current | |
328 | * configuration. | |
329 | */ | |
330 | int (*verify_path)(struct dasd_device *, __u8); | |
331 | ||
8e09f215 SW |
332 | /* |
333 | * Last things to do when a device is set online, and first things | |
334 | * when it is set offline. | |
335 | */ | |
d42e1712 | 336 | int (*basic_to_ready) (struct dasd_device *); |
8e09f215 | 337 | int (*online_to_ready) (struct dasd_device *); |
daa991bf | 338 | int (*basic_to_known)(struct dasd_device *); |
8e09f215 | 339 | |
d42e1712 | 340 | /* (struct dasd_device *); |
8e09f215 SW |
341 | * Device operation functions. build_cp creates a ccw chain for |
342 | * a block device request, start_io starts the request and | |
343 | * term_IO cancels it (e.g. in case of a timeout). format_device | |
8fd57520 JH |
344 | * formats the device and check_device_format compares the format of |
345 | * a device with the expected format_data. | |
8e09f215 SW |
346 | * handle_terminated_request allows to examine a cqr and prepare |
347 | * it for retry. | |
348 | */ | |
1da177e4 | 349 | struct dasd_ccw_req *(*build_cp) (struct dasd_device *, |
8e09f215 | 350 | struct dasd_block *, |
1da177e4 LT |
351 | struct request *); |
352 | int (*start_IO) (struct dasd_ccw_req *); | |
353 | int (*term_IO) (struct dasd_ccw_req *); | |
8e09f215 | 354 | void (*handle_terminated_request) (struct dasd_ccw_req *); |
d42e1712 | 355 | int (*format_device) (struct dasd_device *, |
8fd57520 JH |
356 | struct format_data_t *, int); |
357 | int (*check_device_format)(struct dasd_device *, | |
358 | struct format_check_t *, int); | |
1da177e4 | 359 | int (*free_cp) (struct dasd_ccw_req *, struct request *); |
8e09f215 SW |
360 | |
361 | /* | |
362 | * Error recovery functions. examine_error() returns a value that | |
363 | * indicates what to do for an error condition. If examine_error() | |
138c014d | 364 | * returns 'dasd_era_recover' erp_action() is called to create a |
8e09f215 SW |
365 | * special error recovery ccw. erp_postaction() is called after |
366 | * an error recovery ccw has finished its execution. dump_sense | |
367 | * is called for every error condition to print the sense data | |
368 | * to the console. | |
369 | */ | |
1da177e4 LT |
370 | dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *); |
371 | dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *); | |
372 | void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *, | |
373 | struct irb *); | |
aeec92ca | 374 | void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *); |
5a27e60d SW |
375 | void (*check_for_device_change) (struct dasd_device *, |
376 | struct dasd_ccw_req *, | |
377 | struct irb *); | |
8e09f215 | 378 | |
1da177e4 | 379 | /* i/o control functions. */ |
8e09f215 | 380 | int (*fill_geometry) (struct dasd_block *, struct hd_geometry *); |
1da177e4 | 381 | int (*fill_info) (struct dasd_device *, struct dasd_information2_t *); |
8e09f215 | 382 | int (*ioctl) (struct dasd_block *, unsigned int, void __user *); |
d41dd122 SH |
383 | |
384 | /* suspend/resume functions */ | |
385 | int (*freeze) (struct dasd_device *); | |
386 | int (*restore) (struct dasd_device *); | |
501183f2 SH |
387 | |
388 | /* reload device after state change */ | |
389 | int (*reload) (struct dasd_device *); | |
2dedf0d9 SH |
390 | |
391 | int (*get_uid) (struct dasd_device *, struct dasd_uid *); | |
f1633031 | 392 | void (*kick_validate) (struct dasd_device *); |
5db8440c | 393 | int (*check_attention)(struct dasd_device *, __u8); |
5a3b7b11 SH |
394 | int (*host_access_count)(struct dasd_device *); |
395 | int (*hosts_print)(struct dasd_device *, struct seq_file *); | |
a521b048 SH |
396 | void (*handle_hpf_error)(struct dasd_device *, struct irb *); |
397 | void (*disable_hpf)(struct dasd_device *); | |
398 | int (*hpf_enabled)(struct dasd_device *); | |
399 | void (*reset_path)(struct dasd_device *, __u8); | |
1da177e4 LT |
400 | }; |
401 | ||
402 | extern struct dasd_discipline *dasd_diag_discipline_pointer; | |
403 | ||
20c64468 SW |
404 | /* |
405 | * Notification numbers for extended error reporting notifications: | |
406 | * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's | |
407 | * eer pointer) is freed. The error reporting module needs to do all necessary | |
408 | * cleanup steps. | |
409 | * The DASD_EER_TRIGGER notification sends the actual error reports (triggers). | |
410 | */ | |
411 | #define DASD_EER_DISABLE 0 | |
412 | #define DASD_EER_TRIGGER 1 | |
413 | ||
414 | /* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */ | |
415 | #define DASD_EER_FATALERROR 1 | |
416 | #define DASD_EER_NOPATH 2 | |
417 | #define DASD_EER_STATECHANGE 3 | |
418 | #define DASD_EER_PPRCSUSPEND 4 | |
419 | ||
c9346151 SH |
420 | /* DASD path handling */ |
421 | ||
422 | #define DASD_PATH_OPERATIONAL 1 | |
423 | #define DASD_PATH_TBV 2 | |
424 | #define DASD_PATH_PP 3 | |
425 | #define DASD_PATH_NPP 4 | |
426 | #define DASD_PATH_MISCABLED 5 | |
427 | #define DASD_PATH_NOHPF 6 | |
428 | #define DASD_PATH_CUIR 7 | |
a521b048 | 429 | #define DASD_PATH_IFCC 8 |
c9346151 | 430 | |
a521b048 SH |
431 | #define DASD_THRHLD_MAX 4294967295U |
432 | #define DASD_INTERVAL_MAX 4294967295U | |
c9346151 | 433 | |
a4d26c6a | 434 | struct dasd_path { |
c9346151 | 435 | unsigned long flags; |
a521b048 SH |
436 | u8 cssid; |
437 | u8 ssid; | |
438 | u8 chpid; | |
c9346151 | 439 | struct dasd_conf_data *conf_data; |
a521b048 | 440 | atomic_t error_count; |
7bf76f01 | 441 | unsigned long errorclk; |
a4d26c6a SW |
442 | }; |
443 | ||
c9346151 | 444 | |
4fa52aa7 SW |
445 | struct dasd_profile_info { |
446 | /* legacy part of profile data, as in dasd_profile_info_t */ | |
447 | unsigned int dasd_io_reqs; /* number of requests processed */ | |
448 | unsigned int dasd_io_sects; /* number of sectors processed */ | |
449 | unsigned int dasd_io_secs[32]; /* histogram of request's sizes */ | |
450 | unsigned int dasd_io_times[32]; /* histogram of requests's times */ | |
451 | unsigned int dasd_io_timps[32]; /* h. of requests's times per sector */ | |
452 | unsigned int dasd_io_time1[32]; /* hist. of time from build to start */ | |
453 | unsigned int dasd_io_time2[32]; /* hist. of time from start to irq */ | |
454 | unsigned int dasd_io_time2ps[32]; /* hist. of time from start to irq */ | |
455 | unsigned int dasd_io_time3[32]; /* hist. of time from irq to end */ | |
456 | unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */ | |
457 | ||
458 | /* new data */ | |
459 | struct timespec starttod; /* time of start or last reset */ | |
460 | unsigned int dasd_io_alias; /* requests using an alias */ | |
461 | unsigned int dasd_io_tpm; /* requests using transport mode */ | |
462 | unsigned int dasd_read_reqs; /* total number of read requests */ | |
463 | unsigned int dasd_read_sects; /* total number read sectors */ | |
464 | unsigned int dasd_read_alias; /* read request using an alias */ | |
465 | unsigned int dasd_read_tpm; /* read requests in transport mode */ | |
466 | unsigned int dasd_read_secs[32]; /* histogram of request's sizes */ | |
467 | unsigned int dasd_read_times[32]; /* histogram of requests's times */ | |
468 | unsigned int dasd_read_time1[32]; /* hist. time from build to start */ | |
469 | unsigned int dasd_read_time2[32]; /* hist. of time from start to irq */ | |
470 | unsigned int dasd_read_time3[32]; /* hist. of time from irq to end */ | |
471 | unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */ | |
d2907225 SH |
472 | unsigned long dasd_sum_times; /* sum of request times */ |
473 | unsigned long dasd_sum_time_str; /* sum of time from build to start */ | |
474 | unsigned long dasd_sum_time_irq; /* sum of time from start to irq */ | |
475 | unsigned long dasd_sum_time_end; /* sum of time from irq to end */ | |
4fa52aa7 SW |
476 | }; |
477 | ||
478 | struct dasd_profile { | |
479 | struct dentry *dentry; | |
480 | struct dasd_profile_info *data; | |
481 | spinlock_t lock; | |
482 | }; | |
483 | ||
1da177e4 LT |
484 | struct dasd_device { |
485 | /* Block device stuff. */ | |
8e09f215 SW |
486 | struct dasd_block *block; |
487 | ||
1da177e4 | 488 | unsigned int devindex; |
138c014d HH |
489 | unsigned long flags; /* per device flags */ |
490 | unsigned short features; /* copy of devmap-features (read-only!) */ | |
1da177e4 | 491 | |
20c64468 SW |
492 | /* extended error reporting stuff (eer) */ |
493 | struct dasd_ccw_req *eer_cqr; | |
494 | ||
1da177e4 LT |
495 | /* Device discipline stuff. */ |
496 | struct dasd_discipline *discipline; | |
aa88861f | 497 | struct dasd_discipline *base_discipline; |
543691a4 | 498 | void *private; |
c9346151 SH |
499 | struct dasd_path path[8]; |
500 | __u8 opm; | |
1da177e4 LT |
501 | |
502 | /* Device state and target state. */ | |
503 | int state, target; | |
9eb25122 | 504 | struct mutex state_mutex; |
1da177e4 LT |
505 | int stopped; /* device (ccw_device_start) was stopped */ |
506 | ||
8e09f215 | 507 | /* reference count. */ |
1da177e4 | 508 | atomic_t ref_count; |
1da177e4 LT |
509 | |
510 | /* ccw queue and memory for static ccw/erp buffers. */ | |
511 | struct list_head ccw_queue; | |
512 | spinlock_t mem_lock; | |
513 | void *ccw_mem; | |
514 | void *erp_mem; | |
515 | struct list_head ccw_chunks; | |
516 | struct list_head erp_chunks; | |
517 | ||
518 | atomic_t tasklet_scheduled; | |
519 | struct tasklet_struct tasklet; | |
520 | struct work_struct kick_work; | |
d41dd122 | 521 | struct work_struct restore_device; |
501183f2 | 522 | struct work_struct reload_device; |
f1633031 | 523 | struct work_struct kick_validate; |
59a9ed5f | 524 | struct work_struct suc_work; |
a521b048 | 525 | struct work_struct requeue_requests; |
1da177e4 LT |
526 | struct timer_list timer; |
527 | ||
528 | debug_info_t *debug_area; | |
529 | ||
530 | struct ccw_device *cdev; | |
531 | ||
8e09f215 SW |
532 | /* hook for alias management */ |
533 | struct list_head alias_list; | |
7c8faa86 SH |
534 | |
535 | /* default expiration time in s */ | |
536 | unsigned long default_expires; | |
1f1ee9ad | 537 | unsigned long default_retries; |
4fa52aa7 | 538 | |
3d71ad32 HR |
539 | unsigned long blk_timeout; |
540 | ||
a521b048 SH |
541 | unsigned long path_thrhld; |
542 | unsigned long path_interval; | |
543 | ||
4fa52aa7 | 544 | struct dentry *debugfs_dentry; |
5a3b7b11 | 545 | struct dentry *hosts_dentry; |
4fa52aa7 | 546 | struct dasd_profile profile; |
8e09f215 SW |
547 | }; |
548 | ||
549 | struct dasd_block { | |
550 | /* Block device stuff. */ | |
551 | struct gendisk *gdp; | |
552 | struct request_queue *request_queue; | |
553 | spinlock_t request_queue_lock; | |
e443343e | 554 | struct blk_mq_tag_set tag_set; |
8e09f215 SW |
555 | struct block_device *bdev; |
556 | atomic_t open_count; | |
557 | ||
7bf76f01 | 558 | unsigned long blocks; /* size of volume in blocks */ |
8e09f215 SW |
559 | unsigned int bp_block; /* bytes per block */ |
560 | unsigned int s2b_shift; /* log2 (bp_block/512) */ | |
561 | ||
562 | struct dasd_device *base; | |
563 | struct list_head ccw_queue; | |
564 | spinlock_t queue_lock; | |
565 | ||
566 | atomic_t tasklet_scheduled; | |
567 | struct tasklet_struct tasklet; | |
568 | struct timer_list timer; | |
569 | ||
4fa52aa7 SW |
570 | struct dentry *debugfs_dentry; |
571 | struct dasd_profile profile; | |
1da177e4 LT |
572 | }; |
573 | ||
5db8440c SH |
574 | struct dasd_attention_data { |
575 | struct dasd_device *device; | |
576 | __u8 lpum; | |
577 | }; | |
8e09f215 | 578 | |
e443343e SH |
579 | struct dasd_queue { |
580 | spinlock_t lock; | |
581 | }; | |
582 | ||
1da177e4 LT |
583 | /* reasons why device (ccw_device_start) was stopped */ |
584 | #define DASD_STOPPED_NOT_ACC 1 /* not accessible */ | |
585 | #define DASD_STOPPED_QUIESCE 2 /* Quiesced */ | |
586 | #define DASD_STOPPED_PENDING 4 /* long busy */ | |
587 | #define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */ | |
8e09f215 | 588 | #define DASD_STOPPED_SU 16 /* summary unit check handling */ |
d41dd122 SH |
589 | #define DASD_STOPPED_PM 32 /* pm state transition */ |
590 | #define DASD_UNRESUMED_PM 64 /* pm resume failed state */ | |
1da177e4 LT |
591 | |
592 | /* per device flags */ | |
1da177e4 | 593 | #define DASD_FLAG_OFFLINE 3 /* device is in offline processing */ |
20c64468 SW |
594 | #define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */ |
595 | #define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */ | |
33b62a30 SW |
596 | #define DASD_FLAG_DEVICE_RO 6 /* The device itself is read-only. Don't |
597 | * confuse this with the user specified | |
598 | * read-only feature. | |
599 | */ | |
5a27e60d SW |
600 | #define DASD_FLAG_IS_RESERVED 7 /* The device is reserved */ |
601 | #define DASD_FLAG_LOCK_STOLEN 8 /* The device lock was stolen */ | |
c8d1c0ff | 602 | #define DASD_FLAG_SUSPENDED 9 /* The device was suspended */ |
d07dc5d8 SH |
603 | #define DASD_FLAG_SAFE_OFFLINE 10 /* safe offline processing requested*/ |
604 | #define DASD_FLAG_SAFE_OFFLINE_RUNNING 11 /* safe offline running */ | |
5ea34a01 | 605 | #define DASD_FLAG_ABORTALL 12 /* Abort all noretry requests */ |
1eb38023 | 606 | #define DASD_FLAG_PATH_VERIFY 13 /* Path verification worker running */ |
59a9ed5f | 607 | #define DASD_FLAG_SUC 14 /* unhandled summary unit check */ |
5a27e60d | 608 | |
5ea34a01 HR |
609 | #define DASD_SLEEPON_START_TAG ((void *) 1) |
610 | #define DASD_SLEEPON_END_TAG ((void *) 2) | |
1da177e4 LT |
611 | |
612 | void dasd_put_device_wake(struct dasd_device *); | |
613 | ||
614 | /* | |
615 | * Reference count inliners | |
616 | */ | |
617 | static inline void | |
618 | dasd_get_device(struct dasd_device *device) | |
619 | { | |
620 | atomic_inc(&device->ref_count); | |
621 | } | |
622 | ||
623 | static inline void | |
624 | dasd_put_device(struct dasd_device *device) | |
625 | { | |
626 | if (atomic_dec_return(&device->ref_count) == 0) | |
627 | dasd_put_device_wake(device); | |
628 | } | |
629 | ||
630 | /* | |
631 | * The static memory in ccw_mem and erp_mem is managed by a sorted | |
632 | * list of free memory chunks. | |
633 | */ | |
634 | struct dasd_mchunk | |
635 | { | |
636 | struct list_head list; | |
637 | unsigned long size; | |
638 | } __attribute__ ((aligned(8))); | |
639 | ||
640 | static inline void | |
641 | dasd_init_chunklist(struct list_head *chunk_list, void *mem, | |
642 | unsigned long size) | |
643 | { | |
644 | struct dasd_mchunk *chunk; | |
645 | ||
646 | INIT_LIST_HEAD(chunk_list); | |
647 | chunk = (struct dasd_mchunk *) mem; | |
648 | chunk->size = size - sizeof(struct dasd_mchunk); | |
649 | list_add(&chunk->list, chunk_list); | |
650 | } | |
651 | ||
652 | static inline void * | |
653 | dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size) | |
654 | { | |
655 | struct dasd_mchunk *chunk, *tmp; | |
656 | ||
657 | size = (size + 7L) & -8L; | |
658 | list_for_each_entry(chunk, chunk_list, list) { | |
659 | if (chunk->size < size) | |
660 | continue; | |
661 | if (chunk->size > size + sizeof(struct dasd_mchunk)) { | |
662 | char *endaddr = (char *) (chunk + 1) + chunk->size; | |
663 | tmp = (struct dasd_mchunk *) (endaddr - size) - 1; | |
664 | tmp->size = size; | |
665 | chunk->size -= size + sizeof(struct dasd_mchunk); | |
666 | chunk = tmp; | |
667 | } else | |
668 | list_del(&chunk->list); | |
669 | return (void *) (chunk + 1); | |
670 | } | |
671 | return NULL; | |
672 | } | |
673 | ||
674 | static inline void | |
675 | dasd_free_chunk(struct list_head *chunk_list, void *mem) | |
676 | { | |
677 | struct dasd_mchunk *chunk, *tmp; | |
678 | struct list_head *p, *left; | |
679 | ||
680 | chunk = (struct dasd_mchunk *) | |
681 | ((char *) mem - sizeof(struct dasd_mchunk)); | |
682 | /* Find out the left neighbour in chunk_list. */ | |
683 | left = chunk_list; | |
684 | list_for_each(p, chunk_list) { | |
685 | if (list_entry(p, struct dasd_mchunk, list) > chunk) | |
686 | break; | |
687 | left = p; | |
688 | } | |
689 | /* Try to merge with right neighbour = next element from left. */ | |
690 | if (left->next != chunk_list) { | |
691 | tmp = list_entry(left->next, struct dasd_mchunk, list); | |
692 | if ((char *) (chunk + 1) + chunk->size == (char *) tmp) { | |
693 | list_del(&tmp->list); | |
694 | chunk->size += tmp->size + sizeof(struct dasd_mchunk); | |
695 | } | |
696 | } | |
697 | /* Try to merge with left neighbour. */ | |
698 | if (left != chunk_list) { | |
699 | tmp = list_entry(left, struct dasd_mchunk, list); | |
700 | if ((char *) (tmp + 1) + tmp->size == (char *) chunk) { | |
701 | tmp->size += chunk->size + sizeof(struct dasd_mchunk); | |
702 | return; | |
703 | } | |
704 | } | |
705 | __list_add(&chunk->list, left, left->next); | |
706 | } | |
707 | ||
708 | /* | |
709 | * Check if bsize is in { 512, 1024, 2048, 4096 } | |
710 | */ | |
711 | static inline int | |
712 | dasd_check_blocksize(int bsize) | |
713 | { | |
e108cebb | 714 | if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize)) |
1da177e4 LT |
715 | return -EMEDIUMTYPE; |
716 | return 0; | |
717 | } | |
718 | ||
719 | /* externals in dasd.c */ | |
4fa52aa7 SW |
720 | #define DASD_PROFILE_OFF 0 |
721 | #define DASD_PROFILE_ON 1 | |
722 | #define DASD_PROFILE_GLOBAL_ONLY 2 | |
1da177e4 LT |
723 | |
724 | extern debug_info_t *dasd_debug_area; | |
8ea55c95 | 725 | extern struct dasd_profile dasd_global_profile; |
4fa52aa7 | 726 | extern unsigned int dasd_global_profile_level; |
83d5cde4 | 727 | extern const struct block_device_operations dasd_device_operations; |
1da177e4 | 728 | |
e18b890b | 729 | extern struct kmem_cache *dasd_page_cache; |
1da177e4 LT |
730 | |
731 | struct dasd_ccw_req * | |
68b781fe | 732 | dasd_kmalloc_request(int , int, int, struct dasd_device *); |
1da177e4 | 733 | struct dasd_ccw_req * |
68b781fe | 734 | dasd_smalloc_request(int , int, int, struct dasd_device *); |
1da177e4 LT |
735 | void dasd_kfree_request(struct dasd_ccw_req *, struct dasd_device *); |
736 | void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *); | |
5915a873 | 737 | void dasd_wakeup_cb(struct dasd_ccw_req *, void *); |
1da177e4 LT |
738 | |
739 | static inline int | |
740 | dasd_kmalloc_set_cda(struct ccw1 *ccw, void *cda, struct dasd_device *device) | |
741 | { | |
742 | return set_normalized_cda(ccw, cda); | |
743 | } | |
744 | ||
745 | struct dasd_device *dasd_alloc_device(void); | |
746 | void dasd_free_device(struct dasd_device *); | |
747 | ||
8e09f215 SW |
748 | struct dasd_block *dasd_alloc_block(void); |
749 | void dasd_free_block(struct dasd_block *); | |
750 | ||
e443343e | 751 | enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved); |
3d71ad32 | 752 | |
1da177e4 LT |
753 | void dasd_enable_device(struct dasd_device *); |
754 | void dasd_set_target_state(struct dasd_device *, int); | |
755 | void dasd_kick_device(struct dasd_device *); | |
d41dd122 | 756 | void dasd_restore_device(struct dasd_device *); |
501183f2 | 757 | void dasd_reload_device(struct dasd_device *); |
a521b048 | 758 | void dasd_schedule_requeue(struct dasd_device *); |
1da177e4 LT |
759 | |
760 | void dasd_add_request_head(struct dasd_ccw_req *); | |
761 | void dasd_add_request_tail(struct dasd_ccw_req *); | |
762 | int dasd_start_IO(struct dasd_ccw_req *); | |
763 | int dasd_term_IO(struct dasd_ccw_req *); | |
8e09f215 SW |
764 | void dasd_schedule_device_bh(struct dasd_device *); |
765 | void dasd_schedule_block_bh(struct dasd_block *); | |
1da177e4 | 766 | int dasd_sleep_on(struct dasd_ccw_req *); |
d42e1712 | 767 | int dasd_sleep_on_queue(struct list_head *); |
1da177e4 LT |
768 | int dasd_sleep_on_immediatly(struct dasd_ccw_req *); |
769 | int dasd_sleep_on_interruptible(struct dasd_ccw_req *); | |
8e09f215 SW |
770 | void dasd_device_set_timer(struct dasd_device *, int); |
771 | void dasd_device_clear_timer(struct dasd_device *); | |
772 | void dasd_block_set_timer(struct dasd_block *, int); | |
773 | void dasd_block_clear_timer(struct dasd_block *); | |
1da177e4 | 774 | int dasd_cancel_req(struct dasd_ccw_req *); |
8e09f215 | 775 | int dasd_flush_device_queue(struct dasd_device *); |
1da177e4 | 776 | int dasd_generic_probe (struct ccw_device *, struct dasd_discipline *); |
c020d722 | 777 | void dasd_generic_free_discipline(struct dasd_device *); |
1da177e4 LT |
778 | void dasd_generic_remove (struct ccw_device *cdev); |
779 | int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *); | |
780 | int dasd_generic_set_offline (struct ccw_device *cdev); | |
781 | int dasd_generic_notify(struct ccw_device *, int); | |
a4d26c6a SW |
782 | int dasd_generic_last_path_gone(struct dasd_device *); |
783 | int dasd_generic_path_operational(struct dasd_device *); | |
4679e893 | 784 | void dasd_generic_shutdown(struct ccw_device *); |
a4d26c6a | 785 | |
8e09f215 | 786 | void dasd_generic_handle_state_change(struct dasd_device *); |
d41dd122 SH |
787 | int dasd_generic_pm_freeze(struct ccw_device *); |
788 | int dasd_generic_restore_device(struct ccw_device *); | |
a23ed009 | 789 | enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *); |
a4d26c6a SW |
790 | void dasd_generic_path_event(struct ccw_device *, int *); |
791 | int dasd_generic_verify_path(struct dasd_device *, __u8); | |
1da177e4 | 792 | |
68b781fe | 793 | int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int); |
f3eb5384 | 794 | char *dasd_get_sense(struct irb *); |
17283b56 | 795 | |
eb6e199b SW |
796 | void dasd_device_set_stop_bits(struct dasd_device *, int); |
797 | void dasd_device_remove_stop_bits(struct dasd_device *, int); | |
798 | ||
33b62a30 SW |
799 | int dasd_device_is_ro(struct dasd_device *); |
800 | ||
4fa52aa7 SW |
801 | void dasd_profile_reset(struct dasd_profile *); |
802 | int dasd_profile_on(struct dasd_profile *); | |
803 | void dasd_profile_off(struct dasd_profile *); | |
4fa52aa7 | 804 | char *dasd_get_user_string(const char __user *, size_t); |
33b62a30 | 805 | |
1da177e4 LT |
806 | /* externals in dasd_devmap.c */ |
807 | extern int dasd_max_devindex; | |
808 | extern int dasd_probeonly; | |
809 | extern int dasd_autodetect; | |
40545573 | 810 | extern int dasd_nopav; |
f3eb5384 | 811 | extern int dasd_nofcx; |
1da177e4 LT |
812 | |
813 | int dasd_devmap_init(void); | |
814 | void dasd_devmap_exit(void); | |
815 | ||
816 | struct dasd_device *dasd_create_device(struct ccw_device *); | |
817 | void dasd_delete_device(struct dasd_device *); | |
818 | ||
f24acd45 HH |
819 | int dasd_get_feature(struct ccw_device *, int); |
820 | int dasd_set_feature(struct ccw_device *, int, int); | |
821 | ||
1da177e4 LT |
822 | int dasd_add_sysfs_files(struct ccw_device *); |
823 | void dasd_remove_sysfs_files(struct ccw_device *); | |
824 | ||
825 | struct dasd_device *dasd_device_from_cdev(struct ccw_device *); | |
a00bfd71 | 826 | struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *); |
1da177e4 LT |
827 | struct dasd_device *dasd_device_from_devindex(int); |
828 | ||
65f8da47 SW |
829 | void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *); |
830 | struct dasd_device *dasd_device_from_gendisk(struct gendisk *); | |
831 | ||
3b1bea01 | 832 | int dasd_parse(void) __init; |
69f90f6a | 833 | int dasd_busid_known(const char *); |
1da177e4 LT |
834 | |
835 | /* externals in dasd_gendisk.c */ | |
836 | int dasd_gendisk_init(void); | |
837 | void dasd_gendisk_exit(void); | |
8e09f215 SW |
838 | int dasd_gendisk_alloc(struct dasd_block *); |
839 | void dasd_gendisk_free(struct dasd_block *); | |
840 | int dasd_scan_partitions(struct dasd_block *); | |
841 | void dasd_destroy_partitions(struct dasd_block *); | |
1da177e4 LT |
842 | |
843 | /* externals in dasd_ioctl.c */ | |
57a7c0bc | 844 | int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long); |
1da177e4 LT |
845 | |
846 | /* externals in dasd_proc.c */ | |
847 | int dasd_proc_init(void); | |
848 | void dasd_proc_exit(void); | |
849 | ||
850 | /* externals in dasd_erp.c */ | |
851 | struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *); | |
852 | struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *); | |
853 | struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int, | |
854 | struct dasd_device *); | |
855 | void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *); | |
856 | void dasd_log_sense(struct dasd_ccw_req *, struct irb *); | |
fc19f381 | 857 | void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb); |
1da177e4 | 858 | |
1da177e4 | 859 | /* externals in dasd_3990_erp.c */ |
1da177e4 | 860 | struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *); |
f60c768c | 861 | void dasd_3990_erp_handle_sim(struct dasd_device *, char *); |
1da177e4 | 862 | |
20c64468 SW |
863 | /* externals in dasd_eer.c */ |
864 | #ifdef CONFIG_DASD_EER | |
865 | int dasd_eer_init(void); | |
866 | void dasd_eer_exit(void); | |
867 | int dasd_eer_enable(struct dasd_device *); | |
868 | void dasd_eer_disable(struct dasd_device *); | |
869 | void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr, | |
870 | unsigned int id); | |
871 | void dasd_eer_snss(struct dasd_device *); | |
872 | ||
873 | static inline int dasd_eer_enabled(struct dasd_device *device) | |
874 | { | |
875 | return device->eer_cqr != NULL; | |
876 | } | |
877 | #else | |
878 | #define dasd_eer_init() (0) | |
879 | #define dasd_eer_exit() do { } while (0) | |
880 | #define dasd_eer_enable(d) (0) | |
881 | #define dasd_eer_disable(d) do { } while (0) | |
882 | #define dasd_eer_write(d,c,i) do { } while (0) | |
883 | #define dasd_eer_snss(d) do { } while (0) | |
884 | #define dasd_eer_enabled(d) (0) | |
885 | #endif /* CONFIG_DASD_ERR */ | |
886 | ||
c9346151 SH |
887 | |
888 | /* DASD path handling functions */ | |
889 | ||
890 | /* | |
891 | * helper functions to modify bit masks for a given channel path for a device | |
892 | */ | |
893 | static inline int dasd_path_is_operational(struct dasd_device *device, int chp) | |
894 | { | |
895 | return test_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); | |
896 | } | |
897 | ||
898 | static inline int dasd_path_need_verify(struct dasd_device *device, int chp) | |
899 | { | |
900 | return test_bit(DASD_PATH_TBV, &device->path[chp].flags); | |
901 | } | |
902 | ||
903 | static inline void dasd_path_verify(struct dasd_device *device, int chp) | |
904 | { | |
905 | __set_bit(DASD_PATH_TBV, &device->path[chp].flags); | |
906 | } | |
907 | ||
908 | static inline void dasd_path_clear_verify(struct dasd_device *device, int chp) | |
909 | { | |
910 | __clear_bit(DASD_PATH_TBV, &device->path[chp].flags); | |
911 | } | |
912 | ||
913 | static inline void dasd_path_clear_all_verify(struct dasd_device *device) | |
914 | { | |
915 | int chp; | |
916 | ||
917 | for (chp = 0; chp < 8; chp++) | |
918 | dasd_path_clear_verify(device, chp); | |
919 | } | |
920 | ||
921 | static inline void dasd_path_operational(struct dasd_device *device, int chp) | |
922 | { | |
923 | __set_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); | |
924 | device->opm |= (0x80 >> chp); | |
925 | } | |
926 | ||
927 | static inline void dasd_path_nonpreferred(struct dasd_device *device, int chp) | |
928 | { | |
929 | __set_bit(DASD_PATH_NPP, &device->path[chp].flags); | |
930 | } | |
931 | ||
932 | static inline int dasd_path_is_nonpreferred(struct dasd_device *device, int chp) | |
933 | { | |
934 | return test_bit(DASD_PATH_NPP, &device->path[chp].flags); | |
935 | } | |
936 | ||
937 | static inline void dasd_path_clear_nonpreferred(struct dasd_device *device, | |
938 | int chp) | |
939 | { | |
940 | __clear_bit(DASD_PATH_NPP, &device->path[chp].flags); | |
941 | } | |
942 | ||
943 | static inline void dasd_path_preferred(struct dasd_device *device, int chp) | |
944 | { | |
945 | __set_bit(DASD_PATH_PP, &device->path[chp].flags); | |
946 | } | |
947 | ||
948 | static inline int dasd_path_is_preferred(struct dasd_device *device, int chp) | |
949 | { | |
950 | return test_bit(DASD_PATH_PP, &device->path[chp].flags); | |
951 | } | |
952 | ||
953 | static inline void dasd_path_clear_preferred(struct dasd_device *device, | |
954 | int chp) | |
955 | { | |
956 | __clear_bit(DASD_PATH_PP, &device->path[chp].flags); | |
957 | } | |
958 | ||
959 | static inline void dasd_path_clear_oper(struct dasd_device *device, int chp) | |
960 | { | |
961 | __clear_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags); | |
962 | device->opm &= ~(0x80 >> chp); | |
963 | } | |
964 | ||
965 | static inline void dasd_path_clear_cable(struct dasd_device *device, int chp) | |
966 | { | |
967 | __clear_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); | |
968 | } | |
969 | ||
970 | static inline void dasd_path_cuir(struct dasd_device *device, int chp) | |
971 | { | |
972 | __set_bit(DASD_PATH_CUIR, &device->path[chp].flags); | |
973 | } | |
974 | ||
975 | static inline int dasd_path_is_cuir(struct dasd_device *device, int chp) | |
976 | { | |
977 | return test_bit(DASD_PATH_CUIR, &device->path[chp].flags); | |
978 | } | |
979 | ||
980 | static inline void dasd_path_clear_cuir(struct dasd_device *device, int chp) | |
981 | { | |
982 | __clear_bit(DASD_PATH_CUIR, &device->path[chp].flags); | |
983 | } | |
984 | ||
a521b048 SH |
985 | static inline void dasd_path_ifcc(struct dasd_device *device, int chp) |
986 | { | |
987 | set_bit(DASD_PATH_IFCC, &device->path[chp].flags); | |
988 | } | |
989 | ||
990 | static inline int dasd_path_is_ifcc(struct dasd_device *device, int chp) | |
991 | { | |
992 | return test_bit(DASD_PATH_IFCC, &device->path[chp].flags); | |
993 | } | |
994 | ||
995 | static inline void dasd_path_clear_ifcc(struct dasd_device *device, int chp) | |
996 | { | |
997 | clear_bit(DASD_PATH_IFCC, &device->path[chp].flags); | |
998 | } | |
999 | ||
c9346151 SH |
1000 | static inline void dasd_path_clear_nohpf(struct dasd_device *device, int chp) |
1001 | { | |
1002 | __clear_bit(DASD_PATH_NOHPF, &device->path[chp].flags); | |
1003 | } | |
1004 | ||
1005 | static inline void dasd_path_miscabled(struct dasd_device *device, int chp) | |
1006 | { | |
1007 | __set_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); | |
1008 | } | |
1009 | ||
1010 | static inline int dasd_path_is_miscabled(struct dasd_device *device, int chp) | |
1011 | { | |
1012 | return test_bit(DASD_PATH_MISCABLED, &device->path[chp].flags); | |
1013 | } | |
1014 | ||
1015 | static inline void dasd_path_nohpf(struct dasd_device *device, int chp) | |
1016 | { | |
1017 | __set_bit(DASD_PATH_NOHPF, &device->path[chp].flags); | |
1018 | } | |
1019 | ||
1020 | static inline int dasd_path_is_nohpf(struct dasd_device *device, int chp) | |
1021 | { | |
1022 | return test_bit(DASD_PATH_NOHPF, &device->path[chp].flags); | |
1023 | } | |
1024 | ||
1025 | /* | |
1026 | * get functions for path masks | |
1027 | * will return a path masks for the given device | |
1028 | */ | |
1029 | ||
1030 | static inline __u8 dasd_path_get_opm(struct dasd_device *device) | |
1031 | { | |
1032 | return device->opm; | |
1033 | } | |
1034 | ||
1035 | static inline __u8 dasd_path_get_tbvpm(struct dasd_device *device) | |
1036 | { | |
1037 | int chp; | |
1038 | __u8 tbvpm = 0x00; | |
1039 | ||
1040 | for (chp = 0; chp < 8; chp++) | |
1041 | if (dasd_path_need_verify(device, chp)) | |
1042 | tbvpm |= 0x80 >> chp; | |
1043 | return tbvpm; | |
1044 | } | |
1045 | ||
1046 | static inline __u8 dasd_path_get_nppm(struct dasd_device *device) | |
1047 | { | |
1048 | int chp; | |
1049 | __u8 npm = 0x00; | |
1050 | ||
1051 | for (chp = 0; chp < 8; chp++) { | |
1052 | if (dasd_path_is_nonpreferred(device, chp)) | |
1053 | npm |= 0x80 >> chp; | |
1054 | } | |
1055 | return npm; | |
1056 | } | |
1057 | ||
1058 | static inline __u8 dasd_path_get_ppm(struct dasd_device *device) | |
1059 | { | |
1060 | int chp; | |
1061 | __u8 ppm = 0x00; | |
1062 | ||
1063 | for (chp = 0; chp < 8; chp++) | |
1064 | if (dasd_path_is_preferred(device, chp)) | |
1065 | ppm |= 0x80 >> chp; | |
1066 | return ppm; | |
1067 | } | |
1068 | ||
1069 | static inline __u8 dasd_path_get_cablepm(struct dasd_device *device) | |
1070 | { | |
1071 | int chp; | |
1072 | __u8 cablepm = 0x00; | |
1073 | ||
1074 | for (chp = 0; chp < 8; chp++) | |
1075 | if (dasd_path_is_miscabled(device, chp)) | |
1076 | cablepm |= 0x80 >> chp; | |
1077 | return cablepm; | |
1078 | } | |
1079 | ||
1080 | static inline __u8 dasd_path_get_cuirpm(struct dasd_device *device) | |
1081 | { | |
1082 | int chp; | |
1083 | __u8 cuirpm = 0x00; | |
1084 | ||
1085 | for (chp = 0; chp < 8; chp++) | |
1086 | if (dasd_path_is_cuir(device, chp)) | |
1087 | cuirpm |= 0x80 >> chp; | |
1088 | return cuirpm; | |
1089 | } | |
1090 | ||
a521b048 SH |
1091 | static inline __u8 dasd_path_get_ifccpm(struct dasd_device *device) |
1092 | { | |
1093 | int chp; | |
1094 | __u8 ifccpm = 0x00; | |
1095 | ||
1096 | for (chp = 0; chp < 8; chp++) | |
1097 | if (dasd_path_is_ifcc(device, chp)) | |
1098 | ifccpm |= 0x80 >> chp; | |
1099 | return ifccpm; | |
1100 | } | |
1101 | ||
c9346151 SH |
1102 | static inline __u8 dasd_path_get_hpfpm(struct dasd_device *device) |
1103 | { | |
1104 | int chp; | |
1105 | __u8 hpfpm = 0x00; | |
1106 | ||
1107 | for (chp = 0; chp < 8; chp++) | |
1108 | if (dasd_path_is_nohpf(device, chp)) | |
1109 | hpfpm |= 0x80 >> chp; | |
1110 | return hpfpm; | |
1111 | } | |
1112 | ||
1113 | /* | |
1114 | * add functions for path masks | |
1115 | * the existing path mask will be extended by the given path mask | |
1116 | */ | |
1117 | static inline void dasd_path_add_tbvpm(struct dasd_device *device, __u8 pm) | |
1118 | { | |
1119 | int chp; | |
1120 | ||
1121 | for (chp = 0; chp < 8; chp++) | |
1122 | if (pm & (0x80 >> chp)) | |
1123 | dasd_path_verify(device, chp); | |
1124 | } | |
1125 | ||
a521b048 SH |
1126 | static inline __u8 dasd_path_get_notoperpm(struct dasd_device *device) |
1127 | { | |
1128 | int chp; | |
1129 | __u8 nopm = 0x00; | |
1130 | ||
1131 | for (chp = 0; chp < 8; chp++) | |
1132 | if (dasd_path_is_nohpf(device, chp) || | |
1133 | dasd_path_is_ifcc(device, chp) || | |
1134 | dasd_path_is_cuir(device, chp) || | |
1135 | dasd_path_is_miscabled(device, chp)) | |
1136 | nopm |= 0x80 >> chp; | |
1137 | return nopm; | |
1138 | } | |
1139 | ||
c9346151 SH |
1140 | static inline void dasd_path_add_opm(struct dasd_device *device, __u8 pm) |
1141 | { | |
1142 | int chp; | |
1143 | ||
1144 | for (chp = 0; chp < 8; chp++) | |
1145 | if (pm & (0x80 >> chp)) { | |
1146 | dasd_path_operational(device, chp); | |
1147 | /* | |
1148 | * if the path is used | |
1149 | * it should not be in one of the negative lists | |
1150 | */ | |
1151 | dasd_path_clear_nohpf(device, chp); | |
1152 | dasd_path_clear_cuir(device, chp); | |
1153 | dasd_path_clear_cable(device, chp); | |
a521b048 | 1154 | dasd_path_clear_ifcc(device, chp); |
c9346151 SH |
1155 | } |
1156 | } | |
1157 | ||
1158 | static inline void dasd_path_add_cablepm(struct dasd_device *device, __u8 pm) | |
1159 | { | |
1160 | int chp; | |
1161 | ||
1162 | for (chp = 0; chp < 8; chp++) | |
1163 | if (pm & (0x80 >> chp)) | |
1164 | dasd_path_miscabled(device, chp); | |
1165 | } | |
1166 | ||
1167 | static inline void dasd_path_add_cuirpm(struct dasd_device *device, __u8 pm) | |
1168 | { | |
1169 | int chp; | |
1170 | ||
1171 | for (chp = 0; chp < 8; chp++) | |
1172 | if (pm & (0x80 >> chp)) | |
1173 | dasd_path_cuir(device, chp); | |
1174 | } | |
1175 | ||
a521b048 SH |
1176 | static inline void dasd_path_add_ifccpm(struct dasd_device *device, __u8 pm) |
1177 | { | |
1178 | int chp; | |
1179 | ||
1180 | for (chp = 0; chp < 8; chp++) | |
1181 | if (pm & (0x80 >> chp)) | |
1182 | dasd_path_ifcc(device, chp); | |
1183 | } | |
1184 | ||
c9346151 SH |
1185 | static inline void dasd_path_add_nppm(struct dasd_device *device, __u8 pm) |
1186 | { | |
1187 | int chp; | |
1188 | ||
1189 | for (chp = 0; chp < 8; chp++) | |
1190 | if (pm & (0x80 >> chp)) | |
1191 | dasd_path_nonpreferred(device, chp); | |
1192 | } | |
1193 | ||
1194 | static inline void dasd_path_add_nohpfpm(struct dasd_device *device, __u8 pm) | |
1195 | { | |
1196 | int chp; | |
1197 | ||
1198 | for (chp = 0; chp < 8; chp++) | |
1199 | if (pm & (0x80 >> chp)) | |
1200 | dasd_path_nohpf(device, chp); | |
1201 | } | |
1202 | ||
1203 | static inline void dasd_path_add_ppm(struct dasd_device *device, __u8 pm) | |
1204 | { | |
1205 | int chp; | |
1206 | ||
1207 | for (chp = 0; chp < 8; chp++) | |
1208 | if (pm & (0x80 >> chp)) | |
1209 | dasd_path_preferred(device, chp); | |
1210 | } | |
1211 | ||
1212 | /* | |
1213 | * set functions for path masks | |
1214 | * the existing path mask will be replaced by the given path mask | |
1215 | */ | |
1216 | static inline void dasd_path_set_tbvpm(struct dasd_device *device, __u8 pm) | |
1217 | { | |
1218 | int chp; | |
1219 | ||
1220 | for (chp = 0; chp < 8; chp++) | |
1221 | if (pm & (0x80 >> chp)) | |
1222 | dasd_path_verify(device, chp); | |
1223 | else | |
1224 | dasd_path_clear_verify(device, chp); | |
1225 | } | |
1226 | ||
1227 | static inline void dasd_path_set_opm(struct dasd_device *device, __u8 pm) | |
1228 | { | |
1229 | int chp; | |
1230 | ||
1231 | for (chp = 0; chp < 8; chp++) { | |
1232 | dasd_path_clear_oper(device, chp); | |
1233 | if (pm & (0x80 >> chp)) { | |
1234 | dasd_path_operational(device, chp); | |
1235 | /* | |
1236 | * if the path is used | |
1237 | * it should not be in one of the negative lists | |
1238 | */ | |
1239 | dasd_path_clear_nohpf(device, chp); | |
1240 | dasd_path_clear_cuir(device, chp); | |
1241 | dasd_path_clear_cable(device, chp); | |
a521b048 | 1242 | dasd_path_clear_ifcc(device, chp); |
c9346151 SH |
1243 | } |
1244 | } | |
1245 | } | |
1246 | ||
1247 | /* | |
1248 | * remove functions for path masks | |
1249 | * the existing path mask will be cleared with the given path mask | |
1250 | */ | |
1251 | static inline void dasd_path_remove_opm(struct dasd_device *device, __u8 pm) | |
1252 | { | |
1253 | int chp; | |
1254 | ||
1255 | for (chp = 0; chp < 8; chp++) { | |
1256 | if (pm & (0x80 >> chp)) | |
1257 | dasd_path_clear_oper(device, chp); | |
1258 | } | |
1259 | } | |
1260 | ||
1261 | /* | |
1262 | * add the newly available path to the to be verified pm and remove it from | |
1263 | * normal operation until it is verified | |
1264 | */ | |
1265 | static inline void dasd_path_available(struct dasd_device *device, int chp) | |
1266 | { | |
1267 | dasd_path_clear_oper(device, chp); | |
1268 | dasd_path_verify(device, chp); | |
1269 | } | |
1270 | ||
1271 | static inline void dasd_path_notoper(struct dasd_device *device, int chp) | |
1272 | { | |
1273 | dasd_path_clear_oper(device, chp); | |
1274 | dasd_path_clear_preferred(device, chp); | |
1275 | dasd_path_clear_nonpreferred(device, chp); | |
1276 | } | |
1277 | ||
1278 | /* | |
1279 | * remove all paths from normal operation | |
1280 | */ | |
1281 | static inline void dasd_path_no_path(struct dasd_device *device) | |
1282 | { | |
1283 | int chp; | |
1284 | ||
1285 | for (chp = 0; chp < 8; chp++) | |
1286 | dasd_path_notoper(device, chp); | |
1287 | ||
1288 | dasd_path_clear_all_verify(device); | |
1289 | } | |
1290 | ||
1291 | /* end - path handling */ | |
1292 | ||
1da177e4 | 1293 | #endif /* DASD_H */ |