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
  95 /* 3270 CCW request */
  96 struct raw3270_request {
  97         struct list_head list;          /* list head for request queueing. */
  98         struct raw3270_view *view;      /* view of this request */
  99         struct ccw1 ccw;                /* single ccw. */
 100         void *buffer;                   /* output buffer. */
 101         size_t size;                    /* size of output buffer. */
 102         int rescnt;                     /* residual count from devstat. */
 103         int rc;                         /* return code for this request. */
 104
 105         /* Callback for delivering final status. */
 106         void (*callback)(struct raw3270_request *, void *);
 107         void *callback_data;
 108 };
 109
 110 struct raw3270_request *raw3270_request_alloc(size_t size);
 111 struct raw3270_request *raw3270_request_alloc_bootmem(size_t size);
 112 void raw3270_request_free(struct raw3270_request *);
 113 void raw3270_request_reset(struct raw3270_request *);
 114 void raw3270_request_set_cmd(struct raw3270_request *, u8 cmd);
 115 int  raw3270_request_add_data(struct raw3270_request *, void *, size_t);
 116 void raw3270_request_set_data(struct raw3270_request *, void *, size_t);
 117 void raw3270_request_set_idal(struct raw3270_request *, struct idal_buffer *);
 118
 119 static inline int
 120 raw3270_request_final(struct raw3270_request *rq)
 121 {
 122         return list_empty(&rq->list);
 123 }
 124
 125 void raw3270_buffer_address(struct raw3270 *, char *, unsigned short);
 126
 127 /* Return value of *intv (see raw3270_fn below) can be one of the following: */
 128 #define RAW3270_IO_DONE         0       /* request finished */
 129 #define RAW3270_IO_BUSY         1       /* request still active */
 130 #define RAW3270_IO_RETRY        2       /* retry current request */
 131 #define RAW3270_IO_STOP         3       /* kill current request */
 132
 133 /*
 134  * Functions of a 3270 view.
 135  */
 136 struct raw3270_fn {
 137         int  (*activate)(struct raw3270_view *);
 138         void (*deactivate)(struct raw3270_view *);
 139         int  (*intv)(struct raw3270_view *,
 140                      struct raw3270_request *, struct irb *);
 141         void (*release)(struct raw3270_view *);
 142         void (*free)(struct raw3270_view *);
 143 };
 144
 145 /*
 146  * View structure chaining. The raw3270_view structure is meant to
 147  * be embedded at the start of the real view data structure, e.g.:
 148  *   struct example {
 149  *     struct raw3270_view view;
 150  *     ...
 151  *   };
 152  */
 153 struct raw3270_view {
 154         struct list_head list;
 155         spinlock_t lock;
 156         atomic_t ref_count;
 157         struct raw3270 *dev;
 158         struct raw3270_fn *fn;
 159         unsigned int model;
 160         unsigned int rows, cols;        /* # of rows & colums of the view */
 161         unsigned char *ascebc;          /* ascii -> ebcdic table */
 162 };
 163
 164 int raw3270_add_view(struct raw3270_view *, struct raw3270_fn *, int);
 165 int raw3270_activate_view(struct raw3270_view *);
 166 void raw3270_del_view(struct raw3270_view *);
 167 void raw3270_deactivate_view(struct raw3270_view *);
 168 struct raw3270_view *raw3270_find_view(struct raw3270_fn *, int);
 169 int raw3270_start(struct raw3270_view *, struct raw3270_request *);
 170 int raw3270_start_locked(struct raw3270_view *, struct raw3270_request *);
 171 int raw3270_start_irq(struct raw3270_view *, struct raw3270_request *);
 172 int raw3270_reset(struct raw3270_view *);
 173 struct raw3270_view *raw3270_view(struct raw3270_view *);
 174
 175 /* Reference count inliner for view structures. */
 176 static inline void
 177 raw3270_get_view(struct raw3270_view *view)
 178 {
 179         atomic_inc(&view->ref_count);
 180 }
 181
 182 extern wait_queue_head_t raw3270_wait_queue;
 183
 184 static inline void
 185 raw3270_put_view(struct raw3270_view *view)
 186 {
 187         if (atomic_dec_return(&view->ref_count) == 0)
 188                 wake_up(&raw3270_wait_queue);
 189 }
 190
 191 struct raw3270 *raw3270_setup_console(struct ccw_device *cdev);
 192 void raw3270_wait_cons_dev(struct raw3270 *);
 193
 194 /* Notifier for device addition/removal */
 195 int raw3270_register_notifier(void (*notifier)(int, int));
 196 void raw3270_unregister_notifier(void (*notifier)(int, int));
 197 void raw3270_pm_unfreeze(struct raw3270_view *);
 198
 199 /*
 200  * Little memory allocator for string objects.
 201  */
 202 struct string
 203 {
 204         struct list_head list;
 205         struct list_head update;
 206         unsigned long size;
 207         unsigned long len;
 208         char string[0];
 209 } __attribute__ ((aligned(8)));
 210
 211 static inline struct string *
 212 alloc_string(struct list_head *free_list, unsigned long len)
 213 {
 214         struct string *cs, *tmp;
 215         unsigned long size;
 216
 217         size = (len + 7L) & -8L;
 218         list_for_each_entry(cs, free_list, list) {
 219                 if (cs->size < size)
 220                         continue;
 221                 if (cs->size > size + sizeof(struct string)) {
 222                         char *endaddr = (char *) (cs + 1) + cs->size;
 223                         tmp = (struct string *) (endaddr - size) - 1;
 224                         tmp->size = size;
 225                         cs->size -= size + sizeof(struct string);
 226                         cs = tmp;
 227                 } else
 228                         list_del(&cs->list);
 229                 cs->len = len;
 230                 INIT_LIST_HEAD(&cs->list);
 231                 INIT_LIST_HEAD(&cs->update);
 232                 return cs;
 233         }
 234         return NULL;
 235 }
 236
 237 static inline unsigned long
 238 free_string(struct list_head *free_list, struct string *cs)
 239 {
 240         struct string *tmp;
 241         struct list_head *p, *left;
 242
 243         /* Find out the left neighbour in free memory list. */
 244         left = free_list;
 245         list_for_each(p, free_list) {
 246                 if (list_entry(p, struct string, list) > cs)
 247                         break;
 248                 left = p;
 249         }
 250         /* Try to merge with right neighbour = next element from left. */
 251         if (left->next != free_list) {
 252                 tmp = list_entry(left->next, struct string, list);
 253                 if ((char *) (cs + 1) + cs->size == (char *) tmp) {
 254                         list_del(&tmp->list);
 255                         cs->size += tmp->size + sizeof(struct string);
 256                 }
 257         }
 258         /* Try to merge with left neighbour. */
 259         if (left != free_list) {
 260                 tmp = list_entry(left, struct string, list);
 261                 if ((char *) (tmp + 1) + tmp->size == (char *) cs) {
 262                         tmp->size += cs->size + sizeof(struct string);
 263                         return tmp->size;
 264                 }
 265         }
 266         __list_add(&cs->list, left, left->next);
 267         return cs->size;
 268 }
 269
 270 static inline void
 271 add_string_memory(struct list_head *free_list, void *mem, unsigned long size)
 272 {
 273         struct string *cs;
 274
 275         cs = (struct string *) mem;
 276         cs->size = size - sizeof(struct string);
 277         free_string(free_list, cs);
 278 }
 279