drivers/s390/char/raw3270.h

   1 /*
   2  *  drivers/s390/char/raw3270.h
   3  *    IBM/3270 Driver
   4  *
   5  *  Author(s):
   6  *    Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
   7  *    Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com>
   8  *      -- Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
   9  */
  10
  11 #include <asm/idals.h>
  12 #include <asm/ioctl.h>
  13
  14 /* ioctls for fullscreen 3270 */
  15 #define TUBICMD         _IO('3', 3)     /* set ccw command for fs reads. */
  16 #define TUBOCMD         _IO('3', 4)     /* set ccw command for fs writes. */
  17 #define TUBGETI         _IO('3', 7)     /* get ccw command for fs reads. */
  18 #define TUBGETO         _IO('3', 8)     /* get ccw command for fs writes. */
  19 #define TUBSETMOD       _IO('3',12)     /* FIXME: what does it do ?*/
  20 #define TUBGETMOD       _IO('3',13)     /* FIXME: what does it do ?*/
  21
  22 /* Local Channel Commands */
  23 #define TC_WRITE        0x01            /* Write */
  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_MAXDEVS 256
  80
  81 /* For TUBGETMOD and TUBSETMOD. Should include. */
  82 struct raw3270_iocb {
  83         short model;
  84         short line_cnt;
  85         short col_cnt;
  86         short pf_cnt;
  87         short re_cnt;
  88         short map;
  89 };
  90
  91 struct raw3270;
  92 struct raw3270_view;
  93
  94 /* 3270 CCW request */
  95 struct raw3270_request {
  96         struct list_head list;          /* list head for request queueing. */
  97         struct raw3270_view *view;      /* view of this request */
  98         struct ccw1 ccw;                /* single ccw. */
  99         void *buffer;                   /* output buffer. */
 100         size_t size;                    /* size of output buffer. */
 101         int rescnt;                     /* residual count from devstat. */
 102         int rc;                         /* return code for this request. */
 103
 104         /* Callback for delivering final status. */
 105         void (*callback)(struct raw3270_request *, void *);
 106         void *callback_data;
 107 };
 108
 109 struct raw3270_request *raw3270_request_alloc(size_t size);
 110 struct raw3270_request *raw3270_request_alloc_bootmem(size_t size);
 111 void raw3270_request_free(struct raw3270_request *);
 112 void raw3270_request_reset(struct raw3270_request *);
 113 void raw3270_request_set_cmd(struct raw3270_request *, u8 cmd);
 114 int  raw3270_request_add_data(struct raw3270_request *, void *, size_t);
 115 void raw3270_request_set_data(struct raw3270_request *, void *, size_t);
 116 void raw3270_request_set_idal(struct raw3270_request *, struct idal_buffer *);
 117
 118 static inline int
 119 raw3270_request_final(struct raw3270_request *rq)
 120 {
 121         return list_empty(&rq->list);
 122 }
 123
 124 void raw3270_buffer_address(struct raw3270 *, char *, unsigned short);
 125
 126 /* Return value of *intv (see raw3270_fn below) can be one of the following: */
 127 #define RAW3270_IO_DONE         0       /* request finished */
 128 #define RAW3270_IO_BUSY         1       /* request still active */
 129 #define RAW3270_IO_RETRY        2       /* retry current request */
 130 #define RAW3270_IO_STOP         3       /* kill current request */
 131
 132 /*
 133  * Functions of a 3270 view.
 134  */
 135 struct raw3270_fn {
 136         int  (*activate)(struct raw3270_view *);
 137         void (*deactivate)(struct raw3270_view *);
 138         int  (*intv)(struct raw3270_view *,
 139                      struct raw3270_request *, struct irb *);
 140         void (*release)(struct raw3270_view *);
 141         void (*free)(struct raw3270_view *);
 142 };
 143
 144 /*
 145  * View structure chaining. The raw3270_view structure is meant to
 146  * be embedded at the start of the real view data structure, e.g.:
 147  *   struct example {
 148  *     struct raw3270_view view;
 149  *     ...
 150  *   };
 151  */
 152 struct raw3270_view {
 153         struct list_head list;
 154         spinlock_t lock;
 155         atomic_t ref_count;
 156         struct raw3270 *dev;
 157         struct raw3270_fn *fn;
 158         unsigned int model;
 159         unsigned int rows, cols;        /* # of rows & colums of the view */
 160         unsigned char *ascebc;          /* ascii -> ebcdic table */
 161 };
 162
 163 int raw3270_add_view(struct raw3270_view *, struct raw3270_fn *, int);
 164 int raw3270_activate_view(struct raw3270_view *);
 165 void raw3270_del_view(struct raw3270_view *);
 166 void raw3270_deactivate_view(struct raw3270_view *);
 167 struct raw3270_view *raw3270_find_view(struct raw3270_fn *, int);
 168 int raw3270_start(struct raw3270_view *, struct raw3270_request *);
 169 int raw3270_start_irq(struct raw3270_view *, struct raw3270_request *);
 170
 171 /* Reference count inliner for view structures. */
 172 static inline void
 173 raw3270_get_view(struct raw3270_view *view)
 174 {
 175         atomic_inc(&view->ref_count);
 176 }
 177
 178 extern wait_queue_head_t raw3270_wait_queue;
 179
 180 static inline void
 181 raw3270_put_view(struct raw3270_view *view)
 182 {
 183         if (atomic_dec_return(&view->ref_count) == 0)
 184                 wake_up(&raw3270_wait_queue);
 185 }
 186
 187 struct raw3270 *raw3270_setup_console(struct ccw_device *cdev);
 188 void raw3270_wait_cons_dev(struct raw3270 *);
 189
 190 /* Notifier for device addition/removal */
 191 int raw3270_register_notifier(void (*notifier)(int, int));
 192 void raw3270_unregister_notifier(void (*notifier)(int, int));
 193
 194 /*
 195  * Little memory allocator for string objects.
 196  */
 197 struct string
 198 {
 199         struct list_head list;
 200         struct list_head update;
 201         unsigned long size;
 202         unsigned long len;
 203         char string[0];
 204 } __attribute__ ((aligned(8)));
 205
 206 static inline struct string *
 207 alloc_string(struct list_head *free_list, unsigned long len)
 208 {
 209         struct string *cs, *tmp;
 210         unsigned long size;
 211
 212         size = (len + 7L) & -8L;
 213         list_for_each_entry(cs, free_list, list) {
 214                 if (cs->size < size)
 215                         continue;
 216                 if (cs->size > size + sizeof(struct string)) {
 217                         char *endaddr = (char *) (cs + 1) + cs->size;
 218                         tmp = (struct string *) (endaddr - size) - 1;
 219                         tmp->size = size;
 220                         cs->size -= size + sizeof(struct string);
 221                         cs = tmp;
 222                 } else
 223                         list_del(&cs->list);
 224                 cs->len = len;
 225                 INIT_LIST_HEAD(&cs->list);
 226                 INIT_LIST_HEAD(&cs->update);
 227                 return cs;
 228         }
 229         return 0;
 230 }
 231
 232 static inline unsigned long
 233 free_string(struct list_head *free_list, struct string *cs)
 234 {
 235         struct string *tmp;
 236         struct list_head *p, *left;
 237
 238         /* Find out the left neighbour in free memory list. */
 239         left = free_list;
 240         list_for_each(p, free_list) {
 241                 if (list_entry(p, struct string, list) > cs)
 242                         break;
 243                 left = p;
 244         }
 245         /* Try to merge with right neighbour = next element from left. */
 246         if (left->next != free_list) {
 247                 tmp = list_entry(left->next, struct string, list);
 248                 if ((char *) (cs + 1) + cs->size == (char *) tmp) {
 249                         list_del(&tmp->list);
 250                         cs->size += tmp->size + sizeof(struct string);
 251                 }
 252         }
 253         /* Try to merge with left neighbour. */
 254         if (left != free_list) {
 255                 tmp = list_entry(left, struct string, list);
 256                 if ((char *) (tmp + 1) + tmp->size == (char *) cs) {
 257                         tmp->size += cs->size + sizeof(struct string);
 258                         return tmp->size;
 259                 }
 260         }
 261         __list_add(&cs->list, left, left->next);
 262         return cs->size;
 263 }
 264
 265 static inline void
 266 add_string_memory(struct list_head *free_list, void *mem, unsigned long size)
 267 {
 268         struct string *cs;
 269
 270         cs = (struct string *) mem;
 271         cs->size = size - sizeof(struct string);
 272         free_string(free_list, cs);
 273 }
 274