1 /*
2 * File...........: linux/drivers/s390/block/dasd_eckd.h
3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
4 * Horst Hummel <Horst.Hummel@de.ibm.com>
5 * Bugreports.to..: <Linux390@de.ibm.com>
6 * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
7 *
8 */
9
10 #ifndef DASD_ECKD_H
11 #define DASD_ECKD_H
12
13 /*****************************************************************************
14 * SECTION: CCW Definitions
15 ****************************************************************************/
16 #define DASD_ECKD_CCW_WRITE 0x05
17 #define DASD_ECKD_CCW_READ 0x06
18 #define DASD_ECKD_CCW_WRITE_HOME_ADDRESS 0x09
19 #define DASD_ECKD_CCW_READ_HOME_ADDRESS 0x0a
20 #define DASD_ECKD_CCW_WRITE_KD 0x0d
21 #define DASD_ECKD_CCW_READ_KD 0x0e
22 #define DASD_ECKD_CCW_ERASE 0x11
23 #define DASD_ECKD_CCW_READ_COUNT 0x12
24 #define DASD_ECKD_CCW_SLCK 0x14
25 #define DASD_ECKD_CCW_WRITE_RECORD_ZERO 0x15
26 #define DASD_ECKD_CCW_READ_RECORD_ZERO 0x16
27 #define DASD_ECKD_CCW_WRITE_CKD 0x1d
28 #define DASD_ECKD_CCW_READ_CKD 0x1e
29 #define DASD_ECKD_CCW_PSF 0x27
30 #define DASD_ECKD_CCW_RSSD 0x3e
31 #define DASD_ECKD_CCW_LOCATE_RECORD 0x47
32 #define DASD_ECKD_CCW_SNSS 0x54
33 #define DASD_ECKD_CCW_DEFINE_EXTENT 0x63
34 #define DASD_ECKD_CCW_WRITE_MT 0x85
35 #define DASD_ECKD_CCW_READ_MT 0x86
36 #define DASD_ECKD_CCW_WRITE_KD_MT 0x8d
37 #define DASD_ECKD_CCW_READ_KD_MT 0x8e
38 #define DASD_ECKD_CCW_RELEASE 0x94
39 #define DASD_ECKD_CCW_READ_CKD_MT 0x9e
40 #define DASD_ECKD_CCW_WRITE_CKD_MT 0x9d
41 #define DASD_ECKD_CCW_WRITE_TRACK_DATA 0xA5
42 #define DASD_ECKD_CCW_READ_TRACK_DATA 0xA6
43 #define DASD_ECKD_CCW_RESERVE 0xB4
44 #define DASD_ECKD_CCW_PFX 0xE7
45 #define DASD_ECKD_CCW_PFX_READ 0xEA
46 #define DASD_ECKD_CCW_RSCK 0xF9
47
48 /*
49 * Perform Subsystem Function / Sub-Orders
50 */
51 #define PSF_ORDER_PRSSD 0x18
52 #define PSF_ORDER_SSC 0x1D
53
54 /*
55 * Size that is reportet for large volumes in the old 16-bit no_cyl field
56 */
57 #define LV_COMPAT_CYL 0xFFFE
58
59 /*****************************************************************************
60 * SECTION: Type Definitions
61 ****************************************************************************/
62
63 struct eckd_count {
64 __u16 cyl;
65 __u16 head;
66 __u8 record;
67 __u8 kl;
68 __u16 dl;
69 } __attribute__ ((packed));
70
71 struct ch_t {
72 __u16 cyl;
73 __u16 head;
74 } __attribute__ ((packed));
75
76 struct chs_t {
77 __u16 cyl;
78 __u16 head;
79 __u32 sector;
80 } __attribute__ ((packed));
81
82 struct chr_t {
83 __u16 cyl;
84 __u16 head;
85 __u8 record;
86 } __attribute__ ((packed));
87
88 struct geom_t {
89 __u16 cyl;
90 __u16 head;
91 __u32 sector;
92 } __attribute__ ((packed));
93
94 struct eckd_home {
95 __u8 skip_control[14];
96 __u16 cell_number;
97 __u8 physical_addr[3];
98 __u8 flag;
99 struct ch_t track_addr;
100 __u8 reserved;
101 __u8 key_length;
102 __u8 reserved2[2];
103 } __attribute__ ((packed));
104
105 struct DE_eckd_data {
106 struct {
107 unsigned char perm:2; /* Permissions on this extent */
108 unsigned char reserved:1;
109 unsigned char seek:2; /* Seek control */
110 unsigned char auth:2; /* Access authorization */
111 unsigned char pci:1; /* PCI Fetch mode */
112 } __attribute__ ((packed)) mask;
113 struct {
114 unsigned char mode:2; /* Architecture mode */
115 unsigned char ckd:1; /* CKD Conversion */
116 unsigned char operation:3; /* Operation mode */
117 unsigned char cfw:1; /* Cache fast write */
118 unsigned char dfw:1; /* DASD fast write */
119 } __attribute__ ((packed)) attributes;
120 __u16 blk_size; /* Blocksize */
121 __u16 fast_write_id;
122 __u8 ga_additional; /* Global Attributes Additional */
123 __u8 ga_extended; /* Global Attributes Extended */
124 struct ch_t beg_ext;
125 struct ch_t end_ext;
126 unsigned long long ep_sys_time; /* Ext Parameter - System Time Stamp */
127 __u8 ep_format; /* Extended Parameter format byte */
128 __u8 ep_prio; /* Extended Parameter priority I/O byte */
129 __u8 ep_reserved1; /* Extended Parameter Reserved */
130 __u8 ep_rec_per_track; /* Number of records on a track */
131 __u8 ep_reserved[4]; /* Extended Parameter Reserved */
132 } __attribute__ ((packed));
133
134 struct LO_eckd_data {
135 struct {
136 unsigned char orientation:2;
137 unsigned char operation:6;
138 } __attribute__ ((packed)) operation;
139 struct {
140 unsigned char last_bytes_used:1;
141 unsigned char reserved:6;
142 unsigned char read_count_suffix:1;
143 } __attribute__ ((packed)) auxiliary;
144 __u8 unused;
145 __u8 count;
146 struct ch_t seek_addr;
147 struct chr_t search_arg;
148 __u8 sector;
149 __u16 length;
150 } __attribute__ ((packed));
151
152 struct LRE_eckd_data {
153 struct {
154 unsigned char orientation:2;
155 unsigned char operation:6;
156 } __attribute__ ((packed)) operation;
157 struct {
158 unsigned char length_valid:1;
159 unsigned char length_scope:1;
160 unsigned char imbedded_ccw_valid:1;
161 unsigned char check_bytes:2;
162 unsigned char imbedded_count_valid:1;
163 unsigned char reserved:1;
164 unsigned char read_count_suffix:1;
165 } __attribute__ ((packed)) auxiliary;
166 __u8 imbedded_ccw;
167 __u8 count;
168 struct ch_t seek_addr;
169 struct chr_t search_arg;
170 __u8 sector;
171 __u16 length;
172 __u8 imbedded_count;
173 __u8 extended_operation;
174 __u16 extended_parameter_length;
175 __u8 extended_parameter[0];
176 } __attribute__ ((packed));
177
178 /* Prefix data for format 0x00 and 0x01 */
179 struct PFX_eckd_data {
180 unsigned char format;
181 struct {
182 unsigned char define_extent:1;
183 unsigned char time_stamp:1;
184 unsigned char verify_base:1;
185 unsigned char hyper_pav:1;
186 unsigned char reserved:4;
187 } __attribute__ ((packed)) validity;
188 __u8 base_address;
189 __u8 aux;
190 __u8 base_lss;
191 __u8 reserved[7];
192 struct DE_eckd_data define_extent;
193 struct LRE_eckd_data locate_record;
194 } __attribute__ ((packed));
195
196 struct dasd_eckd_characteristics {
197 __u16 cu_type;
198 struct {
199 unsigned char support:2;
200 unsigned char async:1;
201 unsigned char reserved:1;
202 unsigned char cache_info:1;
203 unsigned char model:3;
204 } __attribute__ ((packed)) cu_model;
205 __u16 dev_type;
206 __u8 dev_model;
207 struct {
208 unsigned char mult_burst:1;
209 unsigned char RT_in_LR:1;
210 unsigned char reserved1:1;
211 unsigned char RD_IN_LR:1;
212 unsigned char reserved2:4;
213 unsigned char reserved3:8;
214 unsigned char defect_wr:1;
215 unsigned char XRC_supported:1;
216 unsigned char reserved4:1;
217 unsigned char striping:1;
218 unsigned char reserved5:4;
219 unsigned char cfw:1;
220 unsigned char reserved6:2;
221 unsigned char cache:1;
222 unsigned char dual_copy:1;
223 unsigned char dfw:1;
224 unsigned char reset_alleg:1;
225 unsigned char sense_down:1;
226 } __attribute__ ((packed)) facilities;
227 __u8 dev_class;
228 __u8 unit_type;
229 __u16 no_cyl;
230 __u16 trk_per_cyl;
231 __u8 sec_per_trk;
232 __u8 byte_per_track[3];
233 __u16 home_bytes;
234 __u8 formula;
235 union {
236 struct {
237 __u8 f1;
238 __u16 f2;
239 __u16 f3;
240 } __attribute__ ((packed)) f_0x01;
241 struct {
242 __u8 f1;
243 __u8 f2;
244 __u8 f3;
245 __u8 f4;
246 __u8 f5;
247 } __attribute__ ((packed)) f_0x02;
248 } __attribute__ ((packed)) factors;
249 __u16 first_alt_trk;
250 __u16 no_alt_trk;
251 __u16 first_dia_trk;
252 __u16 no_dia_trk;
253 __u16 first_sup_trk;
254 __u16 no_sup_trk;
255 __u8 MDR_ID;
256 __u8 OBR_ID;
257 __u8 director;
258 __u8 rd_trk_set;
259 __u16 max_rec_zero;
260 __u8 reserved1;
261 __u8 RWANY_in_LR;
262 __u8 factor6;
263 __u8 factor7;
264 __u8 factor8;
265 __u8 reserved2[3];
266 __u8 reserved3[6];
267 __u32 long_no_cyl;
268 } __attribute__ ((packed));
269
270 /* elements of the configuration data */
271 struct dasd_ned {
272 struct {
273 __u8 identifier:2;
274 __u8 token_id:1;
275 __u8 sno_valid:1;
276 __u8 subst_sno:1;
277 __u8 recNED:1;
278 __u8 emuNED:1;
279 __u8 reserved:1;
280 } __attribute__ ((packed)) flags;
281 __u8 descriptor;
282 __u8 dev_class;
283 __u8 reserved;
284 __u8 dev_type[6];
285 __u8 dev_model[3];
286 __u8 HDA_manufacturer[3];
287 __u8 HDA_location[2];
288 __u8 HDA_seqno[12];
289 __u8 ID;
290 __u8 unit_addr;
291 } __attribute__ ((packed));
292
293 struct dasd_sneq {
294 struct {
295 __u8 identifier:2;
296 __u8 reserved:6;
297 } __attribute__ ((packed)) flags;
298 __u8 res1;
299 __u16 format;
300 __u8 res2[4]; /* byte 4- 7 */
301 __u8 sua_flags; /* byte 8 */
302 __u8 base_unit_addr; /* byte 9 */
303 __u8 res3[22]; /* byte 10-31 */
304 } __attribute__ ((packed));
305
306 struct vd_sneq {
307 struct {
308 __u8 identifier:2;
309 __u8 reserved:6;
310 } __attribute__ ((packed)) flags;
311 __u8 res1;
312 __u16 format;
313 __u8 res2[4]; /* byte 4- 7 */
314 __u8 uit[16]; /* byte 8-23 */
315 __u8 res3[8]; /* byte 24-31 */
316 } __attribute__ ((packed));
317
318 struct dasd_gneq {
319 struct {
320 __u8 identifier:2;
321 __u8 reserved:6;
322 } __attribute__ ((packed)) flags;
323 __u8 reserved[7];
324 __u16 subsystemID;
325 __u8 reserved2[22];
326 } __attribute__ ((packed));
327
328 struct dasd_eckd_path {
329 __u8 opm;
330 __u8 ppm;
331 __u8 npm;
332 };
333
334 struct dasd_rssd_features {
335 char feature[256];
336 } __attribute__((packed));
337
338
339 /*
340 * Perform Subsystem Function - Prepare for Read Subsystem Data
341 */
342 struct dasd_psf_prssd_data {
343 unsigned char order;
344 unsigned char flags;
345 unsigned char reserved[4];
346 unsigned char suborder;
347 unsigned char varies[5];
348 } __attribute__ ((packed));
349
350 /*
351 * Perform Subsystem Function - Set Subsystem Characteristics
352 */
353 struct dasd_psf_ssc_data {
354 unsigned char order;
355 unsigned char flags;
356 unsigned char cu_type[4];
357 unsigned char suborder;
358 unsigned char reserved[59];
359 } __attribute__((packed));
360
361
362 /*
363 * some structures and definitions for alias handling
364 */
365 struct dasd_unit_address_configuration {
366 struct {
367 char ua_type;
368 char base_ua;
369 } unit[256];
370 } __attribute__((packed));
371
372
373 #define MAX_DEVICES_PER_LCU 256
374
375 /* flags on the LCU */
376 #define NEED_UAC_UPDATE 0x01
377 #define UPDATE_PENDING 0x02
378
379 enum pavtype {NO_PAV, BASE_PAV, HYPER_PAV};
380
381
382 struct alias_root {
383 struct list_head serverlist;
384 spinlock_t lock;
385 };
386
387 struct alias_server {
388 struct list_head server;
389 struct dasd_uid uid;
390 struct list_head lculist;
391 };
392
393 struct summary_unit_check_work_data {
394 char reason;
395 struct dasd_device *device;
396 struct work_struct worker;
397 };
398
399 struct read_uac_work_data {
400 struct dasd_device *device;
401 struct delayed_work dwork;
402 };
403
404 struct alias_lcu {
405 struct list_head lcu;
406 struct dasd_uid uid;
407 enum pavtype pav;
408 char flags;
409 spinlock_t lock;
410 struct list_head grouplist;
411 struct list_head active_devices;
412 struct list_head inactive_devices;
413 struct dasd_unit_address_configuration *uac;
414 struct summary_unit_check_work_data suc_data;
415 struct read_uac_work_data ruac_data;
416 struct dasd_ccw_req *rsu_cqr;
417 };
418
419 struct alias_pav_group {
420 struct list_head group;
421 struct dasd_uid uid;
422 struct alias_lcu *lcu;
423 struct list_head baselist;
424 struct list_head aliaslist;
425 struct dasd_device *next;
426 };
427
428
429 struct dasd_eckd_private {
430 struct dasd_eckd_characteristics rdc_data;
431 u8 *conf_data;
432 int conf_len;
433 /* pointers to specific parts in the conf_data */
434 struct dasd_ned *ned;
435 struct dasd_sneq *sneq;
436 struct vd_sneq *vdsneq;
437 struct dasd_gneq *gneq;
438
439 struct dasd_eckd_path path_data;
440 struct eckd_count count_area[5];
441 int init_cqr_status;
442 int uses_cdl;
443 struct attrib_data_t attrib; /* e.g. cache operations */
444 struct dasd_rssd_features features;
445 u32 real_cyl;
446
447 /* alias managemnet */
448 struct dasd_uid uid;
449 struct alias_pav_group *pavgroup;
450 struct alias_lcu *lcu;
451 int count;
452 };
453
454
455
456 int dasd_alias_make_device_known_to_lcu(struct dasd_device *);
457 void dasd_alias_disconnect_device_from_lcu(struct dasd_device *);
458 int dasd_alias_add_device(struct dasd_device *);
459 int dasd_alias_remove_device(struct dasd_device *);
460 struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *);
461 void dasd_alias_handle_summary_unit_check(struct dasd_device *, struct irb *);
462 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *);
463
464 #endif /* DASD_ECKD_H */
465
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