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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> | |
58 | ||
68b781fe SH |
59 | /* DASD discipline magic */ |
60 | #define DASD_ECKD_MAGIC 0xC5C3D2C4 | |
61 | #define DASD_DIAG_MAGIC 0xC4C9C1C7 | |
62 | #define DASD_FBA_MAGIC 0xC6C2C140 | |
63 | ||
1da177e4 LT |
64 | /* |
65 | * SECTION: Type definitions | |
66 | */ | |
67 | struct dasd_device; | |
8e09f215 | 68 | struct dasd_block; |
1da177e4 LT |
69 | |
70 | /* BIT DEFINITIONS FOR SENSE DATA */ | |
71 | #define DASD_SENSE_BIT_0 0x80 | |
72 | #define DASD_SENSE_BIT_1 0x40 | |
73 | #define DASD_SENSE_BIT_2 0x20 | |
74 | #define DASD_SENSE_BIT_3 0x10 | |
75 | ||
f60c768c SH |
76 | /* BIT DEFINITIONS FOR SIM SENSE */ |
77 | #define DASD_SIM_SENSE 0x0F | |
78 | #define DASD_SIM_MSG_TO_OP 0x03 | |
79 | #define DASD_SIM_LOG 0x0C | |
80 | ||
2dedf0d9 SH |
81 | /* lock class for nested cdev lock */ |
82 | #define CDEV_NESTED_FIRST 1 | |
83 | #define CDEV_NESTED_SECOND 2 | |
84 | ||
1da177e4 LT |
85 | /* |
86 | * SECTION: MACROs for klogd and s390 debug feature (dbf) | |
87 | */ | |
88 | #define DBF_DEV_EVENT(d_level, d_device, d_str, d_data...) \ | |
89 | do { \ | |
90 | debug_sprintf_event(d_device->debug_area, \ | |
91 | d_level, \ | |
92 | d_str "\n", \ | |
93 | d_data); \ | |
94 | } while(0) | |
95 | ||
96 | #define DBF_DEV_EXC(d_level, d_device, d_str, d_data...) \ | |
97 | do { \ | |
98 | debug_sprintf_exception(d_device->debug_area, \ | |
99 | d_level, \ | |
100 | d_str "\n", \ | |
101 | d_data); \ | |
102 | } while(0) | |
103 | ||
104 | #define DBF_EVENT(d_level, d_str, d_data...)\ | |
105 | do { \ | |
106 | debug_sprintf_event(dasd_debug_area, \ | |
107 | d_level,\ | |
108 | d_str "\n", \ | |
109 | d_data); \ | |
110 | } while(0) | |
111 | ||
b8ed5dd5 SH |
112 | #define DBF_EVENT_DEVID(d_level, d_cdev, d_str, d_data...) \ |
113 | do { \ | |
114 | struct ccw_dev_id __dev_id; \ | |
115 | ccw_device_get_id(d_cdev, &__dev_id); \ | |
116 | debug_sprintf_event(dasd_debug_area, \ | |
117 | d_level, \ | |
118 | "0.%x.%04x " d_str "\n", \ | |
119 | __dev_id.ssid, __dev_id.devno, d_data); \ | |
120 | } while (0) | |
121 | ||
1da177e4 LT |
122 | #define DBF_EXC(d_level, d_str, d_data...)\ |
123 | do { \ | |
124 | debug_sprintf_exception(dasd_debug_area, \ | |
125 | d_level,\ | |
126 | d_str "\n", \ | |
127 | d_data); \ | |
128 | } while(0) | |
129 | ||
fc19f381 SH |
130 | /* limit size for an errorstring */ |
131 | #define ERRORLENGTH 30 | |
132 | ||
1da177e4 LT |
133 | /* definition of dbf debug levels */ |
134 | #define DBF_EMERG 0 /* system is unusable */ | |
135 | #define DBF_ALERT 1 /* action must be taken immediately */ | |
136 | #define DBF_CRIT 2 /* critical conditions */ | |
137 | #define DBF_ERR 3 /* error conditions */ | |
138 | #define DBF_WARNING 4 /* warning conditions */ | |
139 | #define DBF_NOTICE 5 /* normal but significant condition */ | |
140 | #define DBF_INFO 6 /* informational */ | |
141 | #define DBF_DEBUG 6 /* debug-level messages */ | |
142 | ||
143 | /* messages to be written via klogd and dbf */ | |
144 | #define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\ | |
145 | do { \ | |
146 | printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \ | |
2a0217d5 | 147 | dev_name(&d_device->cdev->dev), d_args); \ |
1da177e4 LT |
148 | DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \ |
149 | } while(0) | |
150 | ||
151 | #define MESSAGE(d_loglevel,d_string,d_args...)\ | |
152 | do { \ | |
153 | printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \ | |
154 | DBF_EVENT(DBF_ALERT, d_string, d_args); \ | |
155 | } while(0) | |
156 | ||
157 | /* messages to be written via klogd only */ | |
158 | #define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\ | |
159 | do { \ | |
160 | printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \ | |
2a0217d5 | 161 | dev_name(&d_device->cdev->dev), d_args); \ |
1da177e4 LT |
162 | } while(0) |
163 | ||
164 | #define MESSAGE_LOG(d_loglevel,d_string,d_args...)\ | |
165 | do { \ | |
166 | printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \ | |
167 | } while(0) | |
168 | ||
169 | struct dasd_ccw_req { | |
170 | unsigned int magic; /* Eye catcher */ | |
8e09f215 SW |
171 | struct list_head devlist; /* for dasd_device request queue */ |
172 | struct list_head blocklist; /* for dasd_block request queue */ | |
1da177e4 LT |
173 | |
174 | /* Where to execute what... */ | |
8e09f215 SW |
175 | struct dasd_block *block; /* the originating block device */ |
176 | struct dasd_device *memdev; /* the device used to allocate this */ | |
177 | struct dasd_device *startdev; /* device the request is started on */ | |
29b8dd9d | 178 | struct dasd_device *basedev; /* base device if no block->base */ |
f3eb5384 SW |
179 | void *cpaddr; /* address of ccw or tcw */ |
180 | unsigned char cpmode; /* 0 = cmd mode, 1 = itcw */ | |
8e09f215 | 181 | char status; /* status of this request */ |
1da177e4 LT |
182 | short retries; /* A retry counter */ |
183 | unsigned long flags; /* flags of this request */ | |
184 | ||
185 | /* ... and how */ | |
186 | unsigned long starttime; /* jiffies time of request start */ | |
7c8faa86 | 187 | unsigned long expires; /* expiration period in jiffies */ |
8e09f215 | 188 | char lpm; /* logical path mask */ |
1da177e4 LT |
189 | void *data; /* pointer to data area */ |
190 | ||
191 | /* these are important for recovering erroneous requests */ | |
6cc7f168 | 192 | int intrc; /* internal error, e.g. from start_IO */ |
1da177e4 LT |
193 | struct irb irb; /* device status in case of an error */ |
194 | struct dasd_ccw_req *refers; /* ERP-chain queueing. */ | |
195 | void *function; /* originating ERP action */ | |
196 | ||
197 | /* these are for statistics only */ | |
198 | unsigned long long buildclk; /* TOD-clock of request generation */ | |
199 | unsigned long long startclk; /* TOD-clock of request start */ | |
200 | unsigned long long stopclk; /* TOD-clock of request interrupt */ | |
201 | unsigned long long endclk; /* TOD-clock of request termination */ | |
202 | ||
203 | /* Callback that is called after reaching final status. */ | |
8e09f215 SW |
204 | void (*callback)(struct dasd_ccw_req *, void *data); |
205 | void *callback_data; | |
1da177e4 LT |
206 | }; |
207 | ||
138c014d | 208 | /* |
1da177e4 LT |
209 | * dasd_ccw_req -> status can be: |
210 | */ | |
8e09f215 SW |
211 | #define DASD_CQR_FILLED 0x00 /* request is ready to be processed */ |
212 | #define DASD_CQR_DONE 0x01 /* request is completed successfully */ | |
213 | #define DASD_CQR_NEED_ERP 0x02 /* request needs recovery action */ | |
214 | #define DASD_CQR_IN_ERP 0x03 /* request is in recovery */ | |
215 | #define DASD_CQR_FAILED 0x04 /* request is finally failed */ | |
216 | #define DASD_CQR_TERMINATED 0x05 /* request was stopped by driver */ | |
217 | ||
218 | #define DASD_CQR_QUEUED 0x80 /* request is queued to be processed */ | |
219 | #define DASD_CQR_IN_IO 0x81 /* request is currently in IO */ | |
220 | #define DASD_CQR_ERROR 0x82 /* request is completed with error */ | |
221 | #define DASD_CQR_CLEAR_PENDING 0x83 /* request is clear pending */ | |
222 | #define DASD_CQR_CLEARED 0x84 /* request was cleared */ | |
73ac36ea | 223 | #define DASD_CQR_SUCCESS 0x85 /* request was successful */ |
8e09f215 | 224 | |
7c8faa86 SH |
225 | /* default expiration time*/ |
226 | #define DASD_EXPIRES 300 | |
227 | #define DASD_EXPIRES_MAX 40000000 | |
1f1ee9ad HR |
228 | #define DASD_RETRIES 256 |
229 | #define DASD_RETRIES_MAX 32768 | |
1da177e4 LT |
230 | |
231 | /* per dasd_ccw_req flags */ | |
232 | #define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */ | |
1c01b8a5 | 233 | #define DASD_CQR_FLAGS_FAILFAST 1 /* FAILFAST */ |
a4d26c6a | 234 | #define DASD_CQR_VERIFY_PATH 2 /* path verification request */ |
5a27e60d SW |
235 | #define DASD_CQR_ALLOW_SLOCK 3 /* Try this request even when lock was |
236 | * stolen. Should not be combined with | |
237 | * DASD_CQR_FLAGS_USE_ERP | |
238 | */ | |
1da177e4 LT |
239 | |
240 | /* Signature for error recovery functions. */ | |
241 | typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *); | |
242 | ||
2dedf0d9 SH |
243 | /* |
244 | * Unique identifier for dasd device. | |
245 | */ | |
246 | #define UA_NOT_CONFIGURED 0x00 | |
247 | #define UA_BASE_DEVICE 0x01 | |
248 | #define UA_BASE_PAV_ALIAS 0x02 | |
249 | #define UA_HYPER_PAV_ALIAS 0x03 | |
250 | ||
251 | struct dasd_uid { | |
252 | __u8 type; | |
253 | char vendor[4]; | |
254 | char serial[15]; | |
255 | __u16 ssid; | |
256 | __u8 real_unit_addr; | |
257 | __u8 base_unit_addr; | |
258 | char vduit[33]; | |
259 | }; | |
260 | ||
1da177e4 LT |
261 | /* |
262 | * the struct dasd_discipline is | |
263 | * sth like a table of virtual functions, if you think of dasd_eckd | |
264 | * inheriting dasd... | |
265 | * no, currently we are not planning to reimplement the driver in C++ | |
266 | */ | |
267 | struct dasd_discipline { | |
268 | struct module *owner; | |
269 | char ebcname[8]; /* a name used for tagging and printks */ | |
270 | char name[8]; /* a name used for tagging and printks */ | |
271 | int max_blocks; /* maximum number of blocks to be chained */ | |
272 | ||
273 | struct list_head list; /* used for list of disciplines */ | |
274 | ||
8e09f215 SW |
275 | /* |
276 | * Device recognition functions. check_device is used to verify | |
277 | * the sense data and the information returned by read device | |
278 | * characteristics. It returns 0 if the discipline can be used | |
279 | * for the device in question. uncheck_device is called during | |
280 | * device shutdown to deregister a device from its discipline. | |
281 | */ | |
282 | int (*check_device) (struct dasd_device *); | |
283 | void (*uncheck_device) (struct dasd_device *); | |
284 | ||
285 | /* | |
286 | * do_analysis is used in the step from device state "basic" to | |
287 | * state "accept". It returns 0 if the device can be made ready, | |
288 | * it returns -EMEDIUMTYPE if the device can't be made ready or | |
289 | * -EAGAIN if do_analysis started a ccw that needs to complete | |
290 | * before the analysis may be repeated. | |
291 | */ | |
292 | int (*do_analysis) (struct dasd_block *); | |
293 | ||
a4d26c6a SW |
294 | /* |
295 | * This function is called, when new paths become available. | |
296 | * Disciplins may use this callback to do necessary setup work, | |
297 | * e.g. verify that new path is compatible with the current | |
298 | * configuration. | |
299 | */ | |
300 | int (*verify_path)(struct dasd_device *, __u8); | |
301 | ||
8e09f215 SW |
302 | /* |
303 | * Last things to do when a device is set online, and first things | |
304 | * when it is set offline. | |
305 | */ | |
d42e1712 | 306 | int (*basic_to_ready) (struct dasd_device *); |
8e09f215 | 307 | int (*online_to_ready) (struct dasd_device *); |
daa991bf | 308 | int (*basic_to_known)(struct dasd_device *); |
8e09f215 | 309 | |
d42e1712 | 310 | /* (struct dasd_device *); |
8e09f215 SW |
311 | * Device operation functions. build_cp creates a ccw chain for |
312 | * a block device request, start_io starts the request and | |
313 | * term_IO cancels it (e.g. in case of a timeout). format_device | |
314 | * returns a ccw chain to be used to format the device. | |
315 | * handle_terminated_request allows to examine a cqr and prepare | |
316 | * it for retry. | |
317 | */ | |
1da177e4 | 318 | struct dasd_ccw_req *(*build_cp) (struct dasd_device *, |
8e09f215 | 319 | struct dasd_block *, |
1da177e4 LT |
320 | struct request *); |
321 | int (*start_IO) (struct dasd_ccw_req *); | |
322 | int (*term_IO) (struct dasd_ccw_req *); | |
8e09f215 | 323 | void (*handle_terminated_request) (struct dasd_ccw_req *); |
d42e1712 | 324 | int (*format_device) (struct dasd_device *, |
a94fa154 | 325 | struct format_data_t *, int enable_pav); |
1da177e4 | 326 | int (*free_cp) (struct dasd_ccw_req *, struct request *); |
8e09f215 SW |
327 | |
328 | /* | |
329 | * Error recovery functions. examine_error() returns a value that | |
330 | * indicates what to do for an error condition. If examine_error() | |
138c014d | 331 | * returns 'dasd_era_recover' erp_action() is called to create a |
8e09f215 SW |
332 | * special error recovery ccw. erp_postaction() is called after |
333 | * an error recovery ccw has finished its execution. dump_sense | |
334 | * is called for every error condition to print the sense data | |
335 | * to the console. | |
336 | */ | |
1da177e4 LT |
337 | dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *); |
338 | dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *); | |
339 | void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *, | |
340 | struct irb *); | |
aeec92ca | 341 | void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *); |
5a27e60d SW |
342 | void (*check_for_device_change) (struct dasd_device *, |
343 | struct dasd_ccw_req *, | |
344 | struct irb *); | |
8e09f215 | 345 | |
1da177e4 | 346 | /* i/o control functions. */ |
8e09f215 | 347 | int (*fill_geometry) (struct dasd_block *, struct hd_geometry *); |
1da177e4 | 348 | int (*fill_info) (struct dasd_device *, struct dasd_information2_t *); |
8e09f215 | 349 | int (*ioctl) (struct dasd_block *, unsigned int, void __user *); |
d41dd122 SH |
350 | |
351 | /* suspend/resume functions */ | |
352 | int (*freeze) (struct dasd_device *); | |
353 | int (*restore) (struct dasd_device *); | |
501183f2 SH |
354 | |
355 | /* reload device after state change */ | |
356 | int (*reload) (struct dasd_device *); | |
2dedf0d9 SH |
357 | |
358 | int (*get_uid) (struct dasd_device *, struct dasd_uid *); | |
f1633031 | 359 | void (*kick_validate) (struct dasd_device *); |
5db8440c | 360 | int (*check_attention)(struct dasd_device *, __u8); |
1da177e4 LT |
361 | }; |
362 | ||
363 | extern struct dasd_discipline *dasd_diag_discipline_pointer; | |
364 | ||
20c64468 SW |
365 | /* |
366 | * Notification numbers for extended error reporting notifications: | |
367 | * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's | |
368 | * eer pointer) is freed. The error reporting module needs to do all necessary | |
369 | * cleanup steps. | |
370 | * The DASD_EER_TRIGGER notification sends the actual error reports (triggers). | |
371 | */ | |
372 | #define DASD_EER_DISABLE 0 | |
373 | #define DASD_EER_TRIGGER 1 | |
374 | ||
375 | /* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */ | |
376 | #define DASD_EER_FATALERROR 1 | |
377 | #define DASD_EER_NOPATH 2 | |
378 | #define DASD_EER_STATECHANGE 3 | |
379 | #define DASD_EER_PPRCSUSPEND 4 | |
380 | ||
a4d26c6a SW |
381 | struct dasd_path { |
382 | __u8 opm; | |
383 | __u8 tbvpm; | |
384 | __u8 ppm; | |
385 | __u8 npm; | |
5db8440c SH |
386 | /* paths that are not used because of a special condition */ |
387 | __u8 cablepm; /* miss-cabled */ | |
388 | __u8 hpfpm; /* the HPF requirements of the other paths are not met */ | |
389 | __u8 cuirpm; /* CUIR varied offline */ | |
a4d26c6a SW |
390 | }; |
391 | ||
4fa52aa7 SW |
392 | struct dasd_profile_info { |
393 | /* legacy part of profile data, as in dasd_profile_info_t */ | |
394 | unsigned int dasd_io_reqs; /* number of requests processed */ | |
395 | unsigned int dasd_io_sects; /* number of sectors processed */ | |
396 | unsigned int dasd_io_secs[32]; /* histogram of request's sizes */ | |
397 | unsigned int dasd_io_times[32]; /* histogram of requests's times */ | |
398 | unsigned int dasd_io_timps[32]; /* h. of requests's times per sector */ | |
399 | unsigned int dasd_io_time1[32]; /* hist. of time from build to start */ | |
400 | unsigned int dasd_io_time2[32]; /* hist. of time from start to irq */ | |
401 | unsigned int dasd_io_time2ps[32]; /* hist. of time from start to irq */ | |
402 | unsigned int dasd_io_time3[32]; /* hist. of time from irq to end */ | |
403 | unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */ | |
404 | ||
405 | /* new data */ | |
406 | struct timespec starttod; /* time of start or last reset */ | |
407 | unsigned int dasd_io_alias; /* requests using an alias */ | |
408 | unsigned int dasd_io_tpm; /* requests using transport mode */ | |
409 | unsigned int dasd_read_reqs; /* total number of read requests */ | |
410 | unsigned int dasd_read_sects; /* total number read sectors */ | |
411 | unsigned int dasd_read_alias; /* read request using an alias */ | |
412 | unsigned int dasd_read_tpm; /* read requests in transport mode */ | |
413 | unsigned int dasd_read_secs[32]; /* histogram of request's sizes */ | |
414 | unsigned int dasd_read_times[32]; /* histogram of requests's times */ | |
415 | unsigned int dasd_read_time1[32]; /* hist. time from build to start */ | |
416 | unsigned int dasd_read_time2[32]; /* hist. of time from start to irq */ | |
417 | unsigned int dasd_read_time3[32]; /* hist. of time from irq to end */ | |
418 | unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */ | |
419 | }; | |
420 | ||
421 | struct dasd_profile { | |
422 | struct dentry *dentry; | |
423 | struct dasd_profile_info *data; | |
424 | spinlock_t lock; | |
425 | }; | |
426 | ||
1da177e4 LT |
427 | struct dasd_device { |
428 | /* Block device stuff. */ | |
8e09f215 SW |
429 | struct dasd_block *block; |
430 | ||
1da177e4 | 431 | unsigned int devindex; |
138c014d HH |
432 | unsigned long flags; /* per device flags */ |
433 | unsigned short features; /* copy of devmap-features (read-only!) */ | |
1da177e4 | 434 | |
20c64468 SW |
435 | /* extended error reporting stuff (eer) */ |
436 | struct dasd_ccw_req *eer_cqr; | |
437 | ||
1da177e4 LT |
438 | /* Device discipline stuff. */ |
439 | struct dasd_discipline *discipline; | |
aa88861f | 440 | struct dasd_discipline *base_discipline; |
1da177e4 | 441 | char *private; |
a4d26c6a | 442 | struct dasd_path path_data; |
1da177e4 LT |
443 | |
444 | /* Device state and target state. */ | |
445 | int state, target; | |
9eb25122 | 446 | struct mutex state_mutex; |
1da177e4 LT |
447 | int stopped; /* device (ccw_device_start) was stopped */ |
448 | ||
8e09f215 | 449 | /* reference count. */ |
1da177e4 | 450 | atomic_t ref_count; |
1da177e4 LT |
451 | |
452 | /* ccw queue and memory for static ccw/erp buffers. */ | |
453 | struct list_head ccw_queue; | |
454 | spinlock_t mem_lock; | |
455 | void *ccw_mem; | |
456 | void *erp_mem; | |
457 | struct list_head ccw_chunks; | |
458 | struct list_head erp_chunks; | |
459 | ||
460 | atomic_t tasklet_scheduled; | |
461 | struct tasklet_struct tasklet; | |
462 | struct work_struct kick_work; | |
d41dd122 | 463 | struct work_struct restore_device; |
501183f2 | 464 | struct work_struct reload_device; |
f1633031 | 465 | struct work_struct kick_validate; |
1da177e4 LT |
466 | struct timer_list timer; |
467 | ||
468 | debug_info_t *debug_area; | |
469 | ||
470 | struct ccw_device *cdev; | |
471 | ||
8e09f215 SW |
472 | /* hook for alias management */ |
473 | struct list_head alias_list; | |
7c8faa86 SH |
474 | |
475 | /* default expiration time in s */ | |
476 | unsigned long default_expires; | |
1f1ee9ad | 477 | unsigned long default_retries; |
4fa52aa7 | 478 | |
3d71ad32 HR |
479 | unsigned long blk_timeout; |
480 | ||
4fa52aa7 SW |
481 | struct dentry *debugfs_dentry; |
482 | struct dasd_profile profile; | |
8e09f215 SW |
483 | }; |
484 | ||
485 | struct dasd_block { | |
486 | /* Block device stuff. */ | |
487 | struct gendisk *gdp; | |
488 | struct request_queue *request_queue; | |
489 | spinlock_t request_queue_lock; | |
490 | struct block_device *bdev; | |
491 | atomic_t open_count; | |
492 | ||
b44b0ab3 | 493 | unsigned long long blocks; /* size of volume in blocks */ |
8e09f215 SW |
494 | unsigned int bp_block; /* bytes per block */ |
495 | unsigned int s2b_shift; /* log2 (bp_block/512) */ | |
496 | ||
497 | struct dasd_device *base; | |
498 | struct list_head ccw_queue; | |
499 | spinlock_t queue_lock; | |
500 | ||
501 | atomic_t tasklet_scheduled; | |
502 | struct tasklet_struct tasklet; | |
503 | struct timer_list timer; | |
504 | ||
4fa52aa7 SW |
505 | struct dentry *debugfs_dentry; |
506 | struct dasd_profile profile; | |
1da177e4 LT |
507 | }; |
508 | ||
5db8440c SH |
509 | struct dasd_attention_data { |
510 | struct dasd_device *device; | |
511 | __u8 lpum; | |
512 | }; | |
8e09f215 | 513 | |
1da177e4 LT |
514 | /* reasons why device (ccw_device_start) was stopped */ |
515 | #define DASD_STOPPED_NOT_ACC 1 /* not accessible */ | |
516 | #define DASD_STOPPED_QUIESCE 2 /* Quiesced */ | |
517 | #define DASD_STOPPED_PENDING 4 /* long busy */ | |
518 | #define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */ | |
8e09f215 | 519 | #define DASD_STOPPED_SU 16 /* summary unit check handling */ |
d41dd122 SH |
520 | #define DASD_STOPPED_PM 32 /* pm state transition */ |
521 | #define DASD_UNRESUMED_PM 64 /* pm resume failed state */ | |
1da177e4 LT |
522 | |
523 | /* per device flags */ | |
1da177e4 | 524 | #define DASD_FLAG_OFFLINE 3 /* device is in offline processing */ |
20c64468 SW |
525 | #define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */ |
526 | #define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */ | |
33b62a30 SW |
527 | #define DASD_FLAG_DEVICE_RO 6 /* The device itself is read-only. Don't |
528 | * confuse this with the user specified | |
529 | * read-only feature. | |
530 | */ | |
5a27e60d SW |
531 | #define DASD_FLAG_IS_RESERVED 7 /* The device is reserved */ |
532 | #define DASD_FLAG_LOCK_STOLEN 8 /* The device lock was stolen */ | |
c8d1c0ff | 533 | #define DASD_FLAG_SUSPENDED 9 /* The device was suspended */ |
d07dc5d8 SH |
534 | #define DASD_FLAG_SAFE_OFFLINE 10 /* safe offline processing requested*/ |
535 | #define DASD_FLAG_SAFE_OFFLINE_RUNNING 11 /* safe offline running */ | |
5ea34a01 | 536 | #define DASD_FLAG_ABORTALL 12 /* Abort all noretry requests */ |
1eb38023 | 537 | #define DASD_FLAG_PATH_VERIFY 13 /* Path verification worker running */ |
5a27e60d | 538 | |
5ea34a01 HR |
539 | #define DASD_SLEEPON_START_TAG ((void *) 1) |
540 | #define DASD_SLEEPON_END_TAG ((void *) 2) | |
1da177e4 LT |
541 | |
542 | void dasd_put_device_wake(struct dasd_device *); | |
543 | ||
544 | /* | |
545 | * Reference count inliners | |
546 | */ | |
547 | static inline void | |
548 | dasd_get_device(struct dasd_device *device) | |
549 | { | |
550 | atomic_inc(&device->ref_count); | |
551 | } | |
552 | ||
553 | static inline void | |
554 | dasd_put_device(struct dasd_device *device) | |
555 | { | |
556 | if (atomic_dec_return(&device->ref_count) == 0) | |
557 | dasd_put_device_wake(device); | |
558 | } | |
559 | ||
560 | /* | |
561 | * The static memory in ccw_mem and erp_mem is managed by a sorted | |
562 | * list of free memory chunks. | |
563 | */ | |
564 | struct dasd_mchunk | |
565 | { | |
566 | struct list_head list; | |
567 | unsigned long size; | |
568 | } __attribute__ ((aligned(8))); | |
569 | ||
570 | static inline void | |
571 | dasd_init_chunklist(struct list_head *chunk_list, void *mem, | |
572 | unsigned long size) | |
573 | { | |
574 | struct dasd_mchunk *chunk; | |
575 | ||
576 | INIT_LIST_HEAD(chunk_list); | |
577 | chunk = (struct dasd_mchunk *) mem; | |
578 | chunk->size = size - sizeof(struct dasd_mchunk); | |
579 | list_add(&chunk->list, chunk_list); | |
580 | } | |
581 | ||
582 | static inline void * | |
583 | dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size) | |
584 | { | |
585 | struct dasd_mchunk *chunk, *tmp; | |
586 | ||
587 | size = (size + 7L) & -8L; | |
588 | list_for_each_entry(chunk, chunk_list, list) { | |
589 | if (chunk->size < size) | |
590 | continue; | |
591 | if (chunk->size > size + sizeof(struct dasd_mchunk)) { | |
592 | char *endaddr = (char *) (chunk + 1) + chunk->size; | |
593 | tmp = (struct dasd_mchunk *) (endaddr - size) - 1; | |
594 | tmp->size = size; | |
595 | chunk->size -= size + sizeof(struct dasd_mchunk); | |
596 | chunk = tmp; | |
597 | } else | |
598 | list_del(&chunk->list); | |
599 | return (void *) (chunk + 1); | |
600 | } | |
601 | return NULL; | |
602 | } | |
603 | ||
604 | static inline void | |
605 | dasd_free_chunk(struct list_head *chunk_list, void *mem) | |
606 | { | |
607 | struct dasd_mchunk *chunk, *tmp; | |
608 | struct list_head *p, *left; | |
609 | ||
610 | chunk = (struct dasd_mchunk *) | |
611 | ((char *) mem - sizeof(struct dasd_mchunk)); | |
612 | /* Find out the left neighbour in chunk_list. */ | |
613 | left = chunk_list; | |
614 | list_for_each(p, chunk_list) { | |
615 | if (list_entry(p, struct dasd_mchunk, list) > chunk) | |
616 | break; | |
617 | left = p; | |
618 | } | |
619 | /* Try to merge with right neighbour = next element from left. */ | |
620 | if (left->next != chunk_list) { | |
621 | tmp = list_entry(left->next, struct dasd_mchunk, list); | |
622 | if ((char *) (chunk + 1) + chunk->size == (char *) tmp) { | |
623 | list_del(&tmp->list); | |
624 | chunk->size += tmp->size + sizeof(struct dasd_mchunk); | |
625 | } | |
626 | } | |
627 | /* Try to merge with left neighbour. */ | |
628 | if (left != chunk_list) { | |
629 | tmp = list_entry(left, struct dasd_mchunk, list); | |
630 | if ((char *) (tmp + 1) + tmp->size == (char *) chunk) { | |
631 | tmp->size += chunk->size + sizeof(struct dasd_mchunk); | |
632 | return; | |
633 | } | |
634 | } | |
635 | __list_add(&chunk->list, left, left->next); | |
636 | } | |
637 | ||
638 | /* | |
639 | * Check if bsize is in { 512, 1024, 2048, 4096 } | |
640 | */ | |
641 | static inline int | |
642 | dasd_check_blocksize(int bsize) | |
643 | { | |
e108cebb | 644 | if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize)) |
1da177e4 LT |
645 | return -EMEDIUMTYPE; |
646 | return 0; | |
647 | } | |
648 | ||
649 | /* externals in dasd.c */ | |
4fa52aa7 SW |
650 | #define DASD_PROFILE_OFF 0 |
651 | #define DASD_PROFILE_ON 1 | |
652 | #define DASD_PROFILE_GLOBAL_ONLY 2 | |
1da177e4 LT |
653 | |
654 | extern debug_info_t *dasd_debug_area; | |
8ea55c95 | 655 | extern struct dasd_profile dasd_global_profile; |
4fa52aa7 | 656 | extern unsigned int dasd_global_profile_level; |
83d5cde4 | 657 | extern const struct block_device_operations dasd_device_operations; |
1da177e4 | 658 | |
e18b890b | 659 | extern struct kmem_cache *dasd_page_cache; |
1da177e4 LT |
660 | |
661 | struct dasd_ccw_req * | |
68b781fe | 662 | dasd_kmalloc_request(int , int, int, struct dasd_device *); |
1da177e4 | 663 | struct dasd_ccw_req * |
68b781fe | 664 | dasd_smalloc_request(int , int, int, struct dasd_device *); |
1da177e4 LT |
665 | void dasd_kfree_request(struct dasd_ccw_req *, struct dasd_device *); |
666 | void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *); | |
5915a873 | 667 | void dasd_wakeup_cb(struct dasd_ccw_req *, void *); |
1da177e4 LT |
668 | |
669 | static inline int | |
670 | dasd_kmalloc_set_cda(struct ccw1 *ccw, void *cda, struct dasd_device *device) | |
671 | { | |
672 | return set_normalized_cda(ccw, cda); | |
673 | } | |
674 | ||
675 | struct dasd_device *dasd_alloc_device(void); | |
676 | void dasd_free_device(struct dasd_device *); | |
677 | ||
8e09f215 SW |
678 | struct dasd_block *dasd_alloc_block(void); |
679 | void dasd_free_block(struct dasd_block *); | |
680 | ||
3d71ad32 HR |
681 | enum blk_eh_timer_return dasd_times_out(struct request *req); |
682 | ||
1da177e4 LT |
683 | void dasd_enable_device(struct dasd_device *); |
684 | void dasd_set_target_state(struct dasd_device *, int); | |
685 | void dasd_kick_device(struct dasd_device *); | |
d41dd122 | 686 | void dasd_restore_device(struct dasd_device *); |
501183f2 | 687 | void dasd_reload_device(struct dasd_device *); |
1da177e4 LT |
688 | |
689 | void dasd_add_request_head(struct dasd_ccw_req *); | |
690 | void dasd_add_request_tail(struct dasd_ccw_req *); | |
691 | int dasd_start_IO(struct dasd_ccw_req *); | |
692 | int dasd_term_IO(struct dasd_ccw_req *); | |
8e09f215 SW |
693 | void dasd_schedule_device_bh(struct dasd_device *); |
694 | void dasd_schedule_block_bh(struct dasd_block *); | |
1da177e4 | 695 | int dasd_sleep_on(struct dasd_ccw_req *); |
d42e1712 | 696 | int dasd_sleep_on_queue(struct list_head *); |
1da177e4 LT |
697 | int dasd_sleep_on_immediatly(struct dasd_ccw_req *); |
698 | int dasd_sleep_on_interruptible(struct dasd_ccw_req *); | |
8e09f215 SW |
699 | void dasd_device_set_timer(struct dasd_device *, int); |
700 | void dasd_device_clear_timer(struct dasd_device *); | |
701 | void dasd_block_set_timer(struct dasd_block *, int); | |
702 | void dasd_block_clear_timer(struct dasd_block *); | |
1da177e4 | 703 | int dasd_cancel_req(struct dasd_ccw_req *); |
8e09f215 | 704 | int dasd_flush_device_queue(struct dasd_device *); |
1da177e4 LT |
705 | int dasd_generic_probe (struct ccw_device *, struct dasd_discipline *); |
706 | void dasd_generic_remove (struct ccw_device *cdev); | |
707 | int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *); | |
708 | int dasd_generic_set_offline (struct ccw_device *cdev); | |
709 | int dasd_generic_notify(struct ccw_device *, int); | |
a4d26c6a SW |
710 | int dasd_generic_last_path_gone(struct dasd_device *); |
711 | int dasd_generic_path_operational(struct dasd_device *); | |
4679e893 | 712 | void dasd_generic_shutdown(struct ccw_device *); |
a4d26c6a | 713 | |
8e09f215 | 714 | void dasd_generic_handle_state_change(struct dasd_device *); |
d41dd122 SH |
715 | int dasd_generic_pm_freeze(struct ccw_device *); |
716 | int dasd_generic_restore_device(struct ccw_device *); | |
a23ed009 | 717 | enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *); |
a4d26c6a SW |
718 | void dasd_generic_path_event(struct ccw_device *, int *); |
719 | int dasd_generic_verify_path(struct dasd_device *, __u8); | |
1da177e4 | 720 | |
68b781fe | 721 | int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int); |
f3eb5384 | 722 | char *dasd_get_sense(struct irb *); |
17283b56 | 723 | |
eb6e199b SW |
724 | void dasd_device_set_stop_bits(struct dasd_device *, int); |
725 | void dasd_device_remove_stop_bits(struct dasd_device *, int); | |
726 | ||
33b62a30 SW |
727 | int dasd_device_is_ro(struct dasd_device *); |
728 | ||
4fa52aa7 SW |
729 | void dasd_profile_reset(struct dasd_profile *); |
730 | int dasd_profile_on(struct dasd_profile *); | |
731 | void dasd_profile_off(struct dasd_profile *); | |
4fa52aa7 | 732 | char *dasd_get_user_string(const char __user *, size_t); |
33b62a30 | 733 | |
1da177e4 LT |
734 | /* externals in dasd_devmap.c */ |
735 | extern int dasd_max_devindex; | |
736 | extern int dasd_probeonly; | |
737 | extern int dasd_autodetect; | |
40545573 | 738 | extern int dasd_nopav; |
f3eb5384 | 739 | extern int dasd_nofcx; |
1da177e4 LT |
740 | |
741 | int dasd_devmap_init(void); | |
742 | void dasd_devmap_exit(void); | |
743 | ||
744 | struct dasd_device *dasd_create_device(struct ccw_device *); | |
745 | void dasd_delete_device(struct dasd_device *); | |
746 | ||
f24acd45 HH |
747 | int dasd_get_feature(struct ccw_device *, int); |
748 | int dasd_set_feature(struct ccw_device *, int, int); | |
749 | ||
1da177e4 LT |
750 | int dasd_add_sysfs_files(struct ccw_device *); |
751 | void dasd_remove_sysfs_files(struct ccw_device *); | |
752 | ||
753 | struct dasd_device *dasd_device_from_cdev(struct ccw_device *); | |
a00bfd71 | 754 | struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *); |
1da177e4 LT |
755 | struct dasd_device *dasd_device_from_devindex(int); |
756 | ||
65f8da47 SW |
757 | void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *); |
758 | struct dasd_device *dasd_device_from_gendisk(struct gendisk *); | |
759 | ||
1da177e4 | 760 | int dasd_parse(void); |
69f90f6a | 761 | int dasd_busid_known(const char *); |
1da177e4 LT |
762 | |
763 | /* externals in dasd_gendisk.c */ | |
764 | int dasd_gendisk_init(void); | |
765 | void dasd_gendisk_exit(void); | |
8e09f215 SW |
766 | int dasd_gendisk_alloc(struct dasd_block *); |
767 | void dasd_gendisk_free(struct dasd_block *); | |
768 | int dasd_scan_partitions(struct dasd_block *); | |
769 | void dasd_destroy_partitions(struct dasd_block *); | |
1da177e4 LT |
770 | |
771 | /* externals in dasd_ioctl.c */ | |
57a7c0bc | 772 | int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long); |
1da177e4 LT |
773 | |
774 | /* externals in dasd_proc.c */ | |
775 | int dasd_proc_init(void); | |
776 | void dasd_proc_exit(void); | |
777 | ||
778 | /* externals in dasd_erp.c */ | |
779 | struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *); | |
780 | struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *); | |
781 | struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int, | |
782 | struct dasd_device *); | |
783 | void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *); | |
784 | void dasd_log_sense(struct dasd_ccw_req *, struct irb *); | |
fc19f381 | 785 | void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb); |
1da177e4 | 786 | |
1da177e4 | 787 | /* externals in dasd_3990_erp.c */ |
1da177e4 | 788 | struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *); |
f60c768c | 789 | void dasd_3990_erp_handle_sim(struct dasd_device *, char *); |
1da177e4 | 790 | |
20c64468 SW |
791 | /* externals in dasd_eer.c */ |
792 | #ifdef CONFIG_DASD_EER | |
793 | int dasd_eer_init(void); | |
794 | void dasd_eer_exit(void); | |
795 | int dasd_eer_enable(struct dasd_device *); | |
796 | void dasd_eer_disable(struct dasd_device *); | |
797 | void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr, | |
798 | unsigned int id); | |
799 | void dasd_eer_snss(struct dasd_device *); | |
800 | ||
801 | static inline int dasd_eer_enabled(struct dasd_device *device) | |
802 | { | |
803 | return device->eer_cqr != NULL; | |
804 | } | |
805 | #else | |
806 | #define dasd_eer_init() (0) | |
807 | #define dasd_eer_exit() do { } while (0) | |
808 | #define dasd_eer_enable(d) (0) | |
809 | #define dasd_eer_disable(d) do { } while (0) | |
810 | #define dasd_eer_write(d,c,i) do { } while (0) | |
811 | #define dasd_eer_snss(d) do { } while (0) | |
812 | #define dasd_eer_enabled(d) (0) | |
813 | #endif /* CONFIG_DASD_ERR */ | |
814 | ||
1da177e4 | 815 | #endif /* DASD_H */ |