drivers/s390/char/sclp.h

   1 /*
   2  * Copyright IBM Corp. 1999,2012
   3  *
   4  * Author(s): Martin Peschke <mpeschke@de.ibm.com>
   5  *            Martin Schwidefsky <schwidefsky@de.ibm.com>
   6  */
   7
   8 #ifndef __SCLP_H__
   9 #define __SCLP_H__
  10
  11 #include <linux/types.h>
  12 #include <linux/list.h>
  13 #include <asm/sclp.h>
  14 #include <asm/ebcdic.h>
  15
  16 /* maximum number of pages concerning our own memory management */
  17 #define MAX_KMEM_PAGES (sizeof(unsigned long) << 3)
  18 #define SCLP_CONSOLE_PAGES      6
  19
  20 #define EVTYP_OPCMD             0x01
  21 #define EVTYP_MSG               0x02
  22 #define EVTYP_DIAG_TEST         0x07
  23 #define EVTYP_STATECHANGE       0x08
  24 #define EVTYP_PMSGCMD           0x09
  25 #define EVTYP_CNTLPROGOPCMD     0x20
  26 #define EVTYP_CNTLPROGIDENT     0x0B
  27 #define EVTYP_SIGQUIESCE        0x1D
  28 #define EVTYP_VT220MSG          0x1A
  29 #define EVTYP_CONFMGMDATA       0x04
  30 #define EVTYP_SDIAS             0x1C
  31 #define EVTYP_ASYNC             0x0A
  32 #define EVTYP_OCF               0x1E
  33
  34 #define EVTYP_OPCMD_MASK        0x80000000
  35 #define EVTYP_MSG_MASK          0x40000000
  36 #define EVTYP_DIAG_TEST_MASK    0x02000000
  37 #define EVTYP_STATECHANGE_MASK  0x01000000
  38 #define EVTYP_PMSGCMD_MASK      0x00800000
  39 #define EVTYP_CTLPROGOPCMD_MASK 0x00000001
  40 #define EVTYP_CTLPROGIDENT_MASK 0x00200000
  41 #define EVTYP_SIGQUIESCE_MASK   0x00000008
  42 #define EVTYP_VT220MSG_MASK     0x00000040
  43 #define EVTYP_CONFMGMDATA_MASK  0x10000000
  44 #define EVTYP_SDIAS_MASK        0x00000010
  45 #define EVTYP_ASYNC_MASK        0x00400000
  46 #define EVTYP_OCF_MASK          0x00000004
  47
  48 #define GNRLMSGFLGS_DOM         0x8000
  49 #define GNRLMSGFLGS_SNDALRM     0x4000
  50 #define GNRLMSGFLGS_HOLDMSG     0x2000
  51
  52 #define LNTPFLGS_CNTLTEXT       0x8000
  53 #define LNTPFLGS_LABELTEXT      0x4000
  54 #define LNTPFLGS_DATATEXT       0x2000
  55 #define LNTPFLGS_ENDTEXT        0x1000
  56 #define LNTPFLGS_PROMPTTEXT     0x0800
  57
  58 typedef unsigned int sclp_cmdw_t;
  59
  60 #define SCLP_CMDW_READ_EVENT_DATA       0x00770005
  61 #define SCLP_CMDW_WRITE_EVENT_DATA      0x00760005
  62 #define SCLP_CMDW_WRITE_EVENT_MASK      0x00780005
  63
  64 #define GDS_ID_MDSMU            0x1310
  65 #define GDS_ID_MDSROUTEINFO     0x1311
  66 #define GDS_ID_AGUNWRKCORR      0x1549
  67 #define GDS_ID_SNACONDREPORT    0x1532
  68 #define GDS_ID_CPMSU            0x1212
  69 #define GDS_ID_ROUTTARGINSTR    0x154D
  70 #define GDS_ID_OPREQ            0x8070
  71 #define GDS_ID_TEXTCMD          0x1320
  72
  73 #define GDS_KEY_SELFDEFTEXTMSG  0x31
  74
  75 enum sclp_pm_event {
  76         SCLP_PM_EVENT_FREEZE,
  77         SCLP_PM_EVENT_THAW,
  78         SCLP_PM_EVENT_RESTORE,
  79 };
  80
  81 #define SCLP_PANIC_PRIO         1
  82 #define SCLP_PANIC_PRIO_CLIENT  0
  83
  84 typedef u32 sccb_mask_t;        /* ATTENTION: assumes 32bit mask !!! */
  85
  86 struct sccb_header {
  87         u16     length;
  88         u8      function_code;
  89         u8      control_mask[3];
  90         u16     response_code;
  91 } __attribute__((packed));
  92
  93 struct init_sccb {
  94         struct sccb_header header;
  95         u16 _reserved;
  96         u16 mask_length;
  97         sccb_mask_t receive_mask;
  98         sccb_mask_t send_mask;
  99         sccb_mask_t sclp_receive_mask;
 100         sccb_mask_t sclp_send_mask;
 101 } __attribute__((packed));
 102
 103 extern u64 sclp_facilities;
 104
 105 #define SCLP_HAS_CHP_INFO       (sclp_facilities & 0x8000000000000000ULL)
 106 #define SCLP_HAS_CHP_RECONFIG   (sclp_facilities & 0x2000000000000000ULL)
 107 #define SCLP_HAS_CPU_INFO       (sclp_facilities & 0x0800000000000000ULL)
 108 #define SCLP_HAS_CPU_RECONFIG   (sclp_facilities & 0x0400000000000000ULL)
 109 #define SCLP_HAS_PCI_RECONFIG   (sclp_facilities & 0x0000000040000000ULL)
 110
 111
 112 struct gds_subvector {
 113         u8      length;
 114         u8      key;
 115 } __attribute__((packed));
 116
 117 struct gds_vector {
 118         u16     length;
 119         u16     gds_id;
 120 } __attribute__((packed));
 121
 122 struct evbuf_header {
 123         u16     length;
 124         u8      type;
 125         u8      flags;
 126         u16     _reserved;
 127 } __attribute__((packed));
 128
 129 struct sclp_req {
 130         struct list_head list;          /* list_head for request queueing. */
 131         sclp_cmdw_t command;            /* sclp command to execute */
 132         void    *sccb;                  /* pointer to the sccb to execute */
 133         char    status;                 /* status of this request */
 134         int     start_count;            /* number of SVCs done for this req */
 135         /* Callback that is called after reaching final status. */
 136         void (*callback)(struct sclp_req *, void *data);
 137         void *callback_data;
 138         int queue_timeout;              /* request queue timeout (sec), set by
 139                                            caller of sclp_add_request(), if
 140                                            needed */
 141         /* Internal fields */
 142         unsigned long queue_expires;    /* request queue timeout (jiffies) */
 143 };
 144
 145 #define SCLP_REQ_FILLED   0x00  /* request is ready to be processed */
 146 #define SCLP_REQ_QUEUED   0x01  /* request is queued to be processed */
 147 #define SCLP_REQ_RUNNING  0x02  /* request is currently running */
 148 #define SCLP_REQ_DONE     0x03  /* request is completed successfully */
 149 #define SCLP_REQ_FAILED   0x05  /* request is finally failed */
 150 #define SCLP_REQ_QUEUED_TIMEOUT 0x06    /* request on queue timed out */
 151
 152 #define SCLP_QUEUE_INTERVAL 5   /* timeout interval for request queue */
 153
 154 /* function pointers that a high level driver has to use for registration */
 155 /* of some routines it wants to be called from the low level driver */
 156 struct sclp_register {
 157         struct list_head list;
 158         /* User wants to receive: */
 159         sccb_mask_t receive_mask;
 160         /* User wants to send: */
 161         sccb_mask_t send_mask;
 162         /* H/W can receive: */
 163         sccb_mask_t sclp_receive_mask;
 164         /* H/W can send: */
 165         sccb_mask_t sclp_send_mask;
 166         /* called if event type availability changes */
 167         void (*state_change_fn)(struct sclp_register *);
 168         /* called for events in cp_receive_mask/sclp_receive_mask */
 169         void (*receiver_fn)(struct evbuf_header *);
 170         /* called for power management events */
 171         void (*pm_event_fn)(struct sclp_register *, enum sclp_pm_event);
 172         /* pm event posted flag */
 173         int pm_event_posted;
 174 };
 175
 176 /* externals from sclp.c */
 177 int sclp_add_request(struct sclp_req *req);
 178 void sclp_sync_wait(void);
 179 int sclp_register(struct sclp_register *reg);
 180 void sclp_unregister(struct sclp_register *reg);
 181 int sclp_remove_processed(struct sccb_header *sccb);
 182 int sclp_deactivate(void);
 183 int sclp_reactivate(void);
 184 int sclp_service_call(sclp_cmdw_t command, void *sccb);
 185 int sclp_sync_request(sclp_cmdw_t command, void *sccb);
 186 int sclp_sync_request_timeout(sclp_cmdw_t command, void *sccb, int timeout);
 187
 188 int sclp_sdias_init(void);
 189 void sclp_sdias_exit(void);
 190
 191 extern int sclp_console_pages;
 192 extern int sclp_console_drop;
 193 extern unsigned long sclp_console_full;
 194 extern u8 sclp_fac84;
 195 extern unsigned long long sclp_rzm;
 196 extern unsigned long long sclp_rnmax;
 197
 198 /* useful inlines */
 199
 200 /* VM uses EBCDIC 037, LPAR+native(SE+HMC) use EBCDIC 500 */
 201 /* translate single character from ASCII to EBCDIC */
 202 static inline unsigned char
 203 sclp_ascebc(unsigned char ch)
 204 {
 205         return (MACHINE_IS_VM) ? _ascebc[ch] : _ascebc_500[ch];
 206 }
 207
 208 /* translate string from EBCDIC to ASCII */
 209 static inline void
 210 sclp_ebcasc_str(unsigned char *str, int nr)
 211 {
 212         (MACHINE_IS_VM) ? EBCASC(str, nr) : EBCASC_500(str, nr);
 213 }
 214
 215 /* translate string from ASCII to EBCDIC */
 216 static inline void
 217 sclp_ascebc_str(unsigned char *str, int nr)
 218 {
 219         (MACHINE_IS_VM) ? ASCEBC(str, nr) : ASCEBC_500(str, nr);
 220 }
 221
 222 static inline struct gds_vector *
 223 sclp_find_gds_vector(void *start, void *end, u16 id)
 224 {
 225         struct gds_vector *v;
 226
 227         for (v = start; (void *) v < end; v = (void *) v + v->length)
 228                 if (v->gds_id == id)
 229                         return v;
 230         return NULL;
 231 }
 232
 233 static inline struct gds_subvector *
 234 sclp_find_gds_subvector(void *start, void *end, u8 key)
 235 {
 236         struct gds_subvector *sv;
 237
 238         for (sv = start; (void *) sv < end; sv = (void *) sv + sv->length)
 239                 if (sv->key == key)
 240                         return sv;
 241         return NULL;
 242 }
 243
 244 #endif   /* __SCLP_H__ */