drivers/s390/char/raw3270.h

   1 /*
   2  * IBM/3270 Driver
   3  *
   4  * Author(s):
   5  *   Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
   6  *   Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com>
   7  *     Copyright IBM Corp. 2003, 2009
   8  */
   9
  10 #include <asm/idals.h>
  11 #include <asm/ioctl.h>
  12
  13 /* ioctls for fullscreen 3270 */
  14 #define TUBICMD         _IO('3', 3)     /* set ccw command for fs reads. */
  15 #define TUBOCMD         _IO('3', 4)     /* set ccw command for fs writes. */
  16 #define TUBGETI         _IO('3', 7)     /* get ccw command for fs reads. */
  17 #define TUBGETO         _IO('3', 8)     /* get ccw command for fs writes. */
  18 #define TUBSETMOD       _IO('3',12)     /* FIXME: what does it do ?*/
  19 #define TUBGETMOD       _IO('3',13)     /* FIXME: what does it do ?*/
  20
  21 /* Local Channel Commands */
  22 #define TC_WRITE        0x01            /* Write */
  23 #define TC_RDBUF        0x02            /* Read Buffer */
  24 #define TC_EWRITE       0x05            /* Erase write */
  25 #define TC_READMOD      0x06            /* Read modified */
  26 #define TC_EWRITEA      0x0d            /* Erase write alternate */
  27 #define TC_WRITESF      0x11            /* Write structured field */
  28
  29 /* Buffer Control Orders */
  30 #define TO_SF           0x1d            /* Start field */
  31 #define TO_SBA          0x11            /* Set buffer address */
  32 #define TO_IC           0x13            /* Insert cursor */
  33 #define TO_PT           0x05            /* Program tab */
  34 #define TO_RA           0x3c            /* Repeat to address */
  35 #define TO_SFE          0x29            /* Start field extended */
  36 #define TO_EUA          0x12            /* Erase unprotected to address */
  37 #define TO_MF           0x2c            /* Modify field */
  38 #define TO_SA           0x28            /* Set attribute */
  39
  40 /* Field Attribute Bytes */
  41 #define TF_INPUT        0x40            /* Visible input */
  42 #define TF_INPUTN       0x4c            /* Invisible input */
  43 #define TF_INMDT        0xc1            /* Visible, Set-MDT */
  44 #define TF_LOG          0x60
  45
  46 /* Character Attribute Bytes */
  47 #define TAT_RESET       0x00
  48 #define TAT_FIELD       0xc0
  49 #define TAT_EXTHI       0x41
  50 #define TAT_COLOR       0x42
  51 #define TAT_CHARS       0x43
  52 #define TAT_TRANS       0x46
  53
  54 /* Extended-Highlighting Bytes */
  55 #define TAX_RESET       0x00
  56 #define TAX_BLINK       0xf1
  57 #define TAX_REVER       0xf2
  58 #define TAX_UNDER       0xf4
  59
  60 /* Reset value */
  61 #define TAR_RESET       0x00
  62
  63 /* Color values */
  64 #define TAC_RESET       0x00
  65 #define TAC_BLUE        0xf1
  66 #define TAC_RED         0xf2
  67 #define TAC_PINK        0xf3
  68 #define TAC_GREEN       0xf4
  69 #define TAC_TURQ        0xf5
  70 #define TAC_YELLOW      0xf6
  71 #define TAC_WHITE       0xf7
  72 #define TAC_DEFAULT     0x00
  73
  74 /* Write Control Characters */
  75 #define TW_NONE         0x40            /* No particular action */
  76 #define TW_KR           0xc2            /* Keyboard restore */
  77 #define TW_PLUSALARM    0x04            /* Add this bit for alarm */
  78
  79 #define RAW3270_FIRSTMINOR      1       /* First minor number */
  80 #define RAW3270_MAXDEVS         255     /* Max number of 3270 devices */
  81
  82 /* For TUBGETMOD and TUBSETMOD. Should include. */
  83 struct raw3270_iocb {
  84         short model;
  85         short line_cnt;
  86         short col_cnt;
  87         short pf_cnt;
  88         short re_cnt;
  89         short map;
  90 };
  91
  92 struct raw3270;
  93 struct raw3270_view;
  94 extern struct class *class3270;
  95
  96 /* 3270 CCW request */
  97 struct raw3270_request {
  98         struct list_head list;          /* list head for request queueing. */
  99         struct raw3270_view *view;      /* view of this request */
 100         struct ccw1 ccw;                /* single ccw. */
 101         void *buffer;                   /* output buffer. */
 102         size_t size;                    /* size of output buffer. */
 103         int rescnt;                     /* residual count from devstat. */
 104         int rc;                         /* return code for this request. */
 105
 106         /* Callback for delivering final status. */
 107         void (*callback)(struct raw3270_request *, void *);
 108         void *callback_data;
 109 };
 110
 111 struct raw3270_request *raw3270_request_alloc(size_t size);
 112 struct raw3270_request *raw3270_request_alloc_bootmem(size_t size);
 113 void raw3270_request_free(struct raw3270_request *);
 114 void raw3270_request_reset(struct raw3270_request *);
 115 void raw3270_request_set_cmd(struct raw3270_request *, u8 cmd);
 116 int  raw3270_request_add_data(struct raw3270_request *, void *, size_t);
 117 void raw3270_request_set_data(struct raw3270_request *, void *, size_t);
 118 void raw3270_request_set_idal(struct raw3270_request *, struct idal_buffer *);
 119
 120 static inline int
 121 raw3270_request_final(struct raw3270_request *rq)
 122 {
 123         return list_empty(&rq->list);
 124 }
 125
 126 void raw3270_buffer_address(struct raw3270 *, char *, unsigned short);
 127
 128 /* Return value of *intv (see raw3270_fn below) can be one of the following: */
 129 #define RAW3270_IO_DONE         0       /* request finished */
 130 #define RAW3270_IO_BUSY         1       /* request still active */
 131 #define RAW3270_IO_RETRY        2       /* retry current request */
 132 #define RAW3270_IO_STOP         3       /* kill current request */
 133
 134 /*
 135  * Functions of a 3270 view.
 136  */
 137 struct raw3270_fn {
 138         int  (*activate)(struct raw3270_view *);
 139         void (*deactivate)(struct raw3270_view *);
 140         int  (*intv)(struct raw3270_view *,
 141                      struct raw3270_request *, struct irb *);
 142         void (*release)(struct raw3270_view *);
 143         void (*free)(struct raw3270_view *);
 144         void (*resize)(struct raw3270_view *, int, int, int);
 145 };
 146
 147 /*
 148  * View structure chaining. The raw3270_view structure is meant to
 149  * be embedded at the start of the real view data structure, e.g.:
 150  *   struct example {
 151  *     struct raw3270_view view;
 152  *     ...
 153  *   };
 154  */
 155 struct raw3270_view {
 156         struct list_head list;
 157         spinlock_t lock;
 158         atomic_t ref_count;
 159         struct raw3270 *dev;
 160         struct raw3270_fn *fn;
 161         unsigned int model;
 162         unsigned int rows, cols;        /* # of rows & colums of the view */
 163         unsigned char *ascebc;          /* ascii -> ebcdic table */
 164 };
 165
 166 int raw3270_add_view(struct raw3270_view *, struct raw3270_fn *, int);
 167 int raw3270_activate_view(struct raw3270_view *);
 168 void raw3270_del_view(struct raw3270_view *);
 169 void raw3270_deactivate_view(struct raw3270_view *);
 170 struct raw3270_view *raw3270_find_view(struct raw3270_fn *, int);
 171 int raw3270_start(struct raw3270_view *, struct raw3270_request *);
 172 int raw3270_start_locked(struct raw3270_view *, struct raw3270_request *);
 173 int raw3270_start_irq(struct raw3270_view *, struct raw3270_request *);
 174 int raw3270_reset(struct raw3270_view *);
 175 struct raw3270_view *raw3270_view(struct raw3270_view *);
 176 int raw3270_view_active(struct raw3270_view *);
 177
 178 /* Reference count inliner for view structures. */
 179 static inline void
 180 raw3270_get_view(struct raw3270_view *view)
 181 {
 182         atomic_inc(&view->ref_count);
 183 }
 184
 185 extern wait_queue_head_t raw3270_wait_queue;
 186
 187 static inline void
 188 raw3270_put_view(struct raw3270_view *view)
 189 {
 190         if (atomic_dec_return(&view->ref_count) == 0)
 191                 wake_up(&raw3270_wait_queue);
 192 }
 193
 194 struct raw3270 *raw3270_setup_console(void);
 195 void raw3270_wait_cons_dev(struct raw3270 *);
 196
 197 /* Notifier for device addition/removal */
 198 struct raw3270_notifier {
 199         struct list_head list;
 200         void (*create)(int minor);
 201         void (*destroy)(int minor);
 202 };
 203
 204 int raw3270_register_notifier(struct raw3270_notifier *);
 205 void raw3270_unregister_notifier(struct raw3270_notifier *);
 206 void raw3270_pm_unfreeze(struct raw3270_view *);
 207
 208 /*
 209  * Little memory allocator for string objects.
 210  */
 211 struct string
 212 {
 213         struct list_head list;
 214         struct list_head update;
 215         unsigned long size;
 216         unsigned long len;
 217         char string[0];
 218 } __attribute__ ((aligned(8)));
 219
 220 static inline struct string *
 221 alloc_string(struct list_head *free_list, unsigned long len)
 222 {
 223         struct string *cs, *tmp;
 224         unsigned long size;
 225
 226         size = (len + 7L) & -8L;
 227         list_for_each_entry(cs, free_list, list) {
 228                 if (cs->size < size)
 229                         continue;
 230                 if (cs->size > size + sizeof(struct string)) {
 231                         char *endaddr = (char *) (cs + 1) + cs->size;
 232                         tmp = (struct string *) (endaddr - size) - 1;
 233                         tmp->size = size;
 234                         cs->size -= size + sizeof(struct string);
 235                         cs = tmp;
 236                 } else
 237                         list_del(&cs->list);
 238                 cs->len = len;
 239                 INIT_LIST_HEAD(&cs->list);
 240                 INIT_LIST_HEAD(&cs->update);
 241                 return cs;
 242         }
 243         return NULL;
 244 }
 245
 246 static inline unsigned long
 247 free_string(struct list_head *free_list, struct string *cs)
 248 {
 249         struct string *tmp;
 250         struct list_head *p, *left;
 251
 252         /* Find out the left neighbour in free memory list. */
 253         left = free_list;
 254         list_for_each(p, free_list) {
 255                 if (list_entry(p, struct string, list) > cs)
 256                         break;
 257                 left = p;
 258         }
 259         /* Try to merge with right neighbour = next element from left. */
 260         if (left->next != free_list) {
 261                 tmp = list_entry(left->next, struct string, list);
 262                 if ((char *) (cs + 1) + cs->size == (char *) tmp) {
 263                         list_del(&tmp->list);
 264                         cs->size += tmp->size + sizeof(struct string);
 265                 }
 266         }
 267         /* Try to merge with left neighbour. */
 268         if (left != free_list) {
 269                 tmp = list_entry(left, struct string, list);
 270                 if ((char *) (tmp + 1) + tmp->size == (char *) cs) {
 271                         tmp->size += cs->size + sizeof(struct string);
 272                         return tmp->size;
 273                 }
 274         }
 275         __list_add(&cs->list, left, left->next);
 276         return cs->size;
 277 }
 278
 279 static inline void
 280 add_string_memory(struct list_head *free_list, void *mem, unsigned long size)
 281 {
 282         struct string *cs;
 283
 284         cs = (struct string *) mem;
 285         cs->size = size - sizeof(struct string);
 286         free_string(free_list, cs);
 287 }
 288