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[S390] dasd: tunable missing interrupt handler
[~shefty/rdma-dev.git] / drivers / s390 / block / dasd_eckd.h
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[5];
324         struct {
325                 __u8 value:2;
326                 __u8 number:6;
327         } __attribute__ ((packed)) timeout;
328         __u8 reserved3;
329         __u16 subsystemID;
330         __u8 reserved2[22];
331 } __attribute__ ((packed));
332
333 struct dasd_eckd_path {
334         __u8 opm;
335         __u8 ppm;
336         __u8 npm;
337 };
338
339 struct dasd_rssd_features {
340         char feature[256];
341 } __attribute__((packed));
342
343
344 /*
345  * Perform Subsystem Function - Prepare for Read Subsystem Data
346  */
347 struct dasd_psf_prssd_data {
348         unsigned char order;
349         unsigned char flags;
350         unsigned char reserved[4];
351         unsigned char suborder;
352         unsigned char varies[5];
353 } __attribute__ ((packed));
354
355 /*
356  * Perform Subsystem Function - Set Subsystem Characteristics
357  */
358 struct dasd_psf_ssc_data {
359         unsigned char order;
360         unsigned char flags;
361         unsigned char cu_type[4];
362         unsigned char suborder;
363         unsigned char reserved[59];
364 } __attribute__((packed));
365
366
367 /*
368  * some structures and definitions for alias handling
369  */
370 struct dasd_unit_address_configuration {
371         struct {
372                 char ua_type;
373                 char base_ua;
374         } unit[256];
375 } __attribute__((packed));
376
377
378 #define MAX_DEVICES_PER_LCU 256
379
380 /* flags on the LCU  */
381 #define NEED_UAC_UPDATE  0x01
382 #define UPDATE_PENDING  0x02
383
384 enum pavtype {NO_PAV, BASE_PAV, HYPER_PAV};
385
386
387 struct alias_root {
388         struct list_head serverlist;
389         spinlock_t lock;
390 };
391
392 struct alias_server {
393         struct list_head server;
394         struct dasd_uid uid;
395         struct list_head lculist;
396 };
397
398 struct summary_unit_check_work_data {
399         char reason;
400         struct dasd_device *device;
401         struct work_struct worker;
402 };
403
404 struct read_uac_work_data {
405         struct dasd_device *device;
406         struct delayed_work dwork;
407 };
408
409 struct alias_lcu {
410         struct list_head lcu;
411         struct dasd_uid uid;
412         enum pavtype pav;
413         char flags;
414         spinlock_t lock;
415         struct list_head grouplist;
416         struct list_head active_devices;
417         struct list_head inactive_devices;
418         struct dasd_unit_address_configuration *uac;
419         struct summary_unit_check_work_data suc_data;
420         struct read_uac_work_data ruac_data;
421         struct dasd_ccw_req *rsu_cqr;
422         struct completion lcu_setup;
423 };
424
425 struct alias_pav_group {
426         struct list_head group;
427         struct dasd_uid uid;
428         struct alias_lcu *lcu;
429         struct list_head baselist;
430         struct list_head aliaslist;
431         struct dasd_device *next;
432 };
433
434 struct dasd_eckd_private {
435         struct dasd_eckd_characteristics rdc_data;
436         u8 *conf_data;
437         int conf_len;
438         /* pointers to specific parts in the conf_data */
439         struct dasd_ned *ned;
440         struct dasd_sneq *sneq;
441         struct vd_sneq *vdsneq;
442         struct dasd_gneq *gneq;
443
444         struct dasd_eckd_path path_data;
445         struct eckd_count count_area[5];
446         int init_cqr_status;
447         int uses_cdl;
448         struct attrib_data_t attrib;    /* e.g. cache operations */
449         struct dasd_rssd_features features;
450         u32 real_cyl;
451
452         /* alias managemnet */
453         struct dasd_uid uid;
454         struct alias_pav_group *pavgroup;
455         struct alias_lcu *lcu;
456         int count;
457 };
458
459
460
461 int dasd_alias_make_device_known_to_lcu(struct dasd_device *);
462 void dasd_alias_disconnect_device_from_lcu(struct dasd_device *);
463 int dasd_alias_add_device(struct dasd_device *);
464 int dasd_alias_remove_device(struct dasd_device *);
465 struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *);
466 void dasd_alias_handle_summary_unit_check(struct dasd_device *, struct irb *);
467 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *);
468 void dasd_alias_lcu_setup_complete(struct dasd_device *);
469 void dasd_alias_wait_for_lcu_setup(struct dasd_device *);
470 int dasd_alias_update_add_device(struct dasd_device *);
471 #endif                          /* DASD_ECKD_H */