drivers/rtl8139/liveupdate.c

   1 #include "rtl8139.h"
   2
   3 /* State management variables. */
   4 EXTERN re_t re_table[RE_PORT_NR];
   5
   6 /* Custom states definition. */
   7 #define RL_STATE_READ_PROTOCOL_FREE     (SEF_LU_STATE_CUSTOM_BASE + 0)
   8 #define RL_STATE_WRITE_PROTOCOL_FREE    (SEF_LU_STATE_CUSTOM_BASE + 1)
   9 #define RL_STATE_IS_CUSTOM(s) \
  10     ((s) >= RL_STATE_READ_PROTOCOL_FREE && (s) <= RL_STATE_WRITE_PROTOCOL_FREE)
  11
  12 /* State management helpers. */
  13 PRIVATE int is_reading;
  14 PRIVATE int is_writing;
  15 PRIVATE void load_state_info(void)
  16 {
  17   int i, found_processing;
  18   re_t *rep;
  19
  20   /* Check if we are reading or writing. */
  21   is_reading = FALSE;
  22   is_writing = FALSE;
  23   found_processing = FALSE;
  24   for (i= 0; i<RE_PORT_NR && !found_processing; i++) {
  25       rep = &re_table[i];
  26
  27       if (rep->re_flags & REF_READING) {
  28           is_reading = TRUE;
  29       }
  30
  31       if (rep->re_flags & REF_SEND_AVAIL) {
  32           is_writing = TRUE;
  33       }
  34
  35       found_processing = (is_reading && is_writing);
  36   }
  37 }
  38
  39 /*===========================================================================*
  40  *                               sef_cb_lu_prepare                           *
  41  *===========================================================================*/
  42 PUBLIC void sef_cb_lu_prepare(int state)
  43 {
  44   int is_ready;
  45
  46   /* Load state information. */
  47   load_state_info();
  48
  49   /* Check if we are ready for the target state. */
  50   is_ready = FALSE;
  51   switch(state) {
  52       /* Standard states. */
  53       case SEF_LU_STATE_REQUEST_FREE:
  54           is_ready = TRUE;
  55       break;
  56
  57       case SEF_LU_STATE_PROTOCOL_FREE:
  58           is_ready = (!is_reading && !is_writing);
  59       break;
  60
  61       /* Custom states. */
  62       case RL_STATE_READ_PROTOCOL_FREE:
  63           is_ready = (!is_reading);
  64       break;
  65
  66       case RL_STATE_WRITE_PROTOCOL_FREE:
  67           is_ready = (!is_writing);
  68       break;
  69   }
  70
  71   /* Tell SEF if we are ready. */
  72   if(is_ready) {
  73       sef_lu_ready(OK);
  74   }
  75 }
  76
  77 /*===========================================================================*
  78  *                        sef_cb_lu_state_isvalid                            *
  79  *===========================================================================*/
  80 PUBLIC int sef_cb_lu_state_isvalid(int state)
  81 {
  82   return SEF_LU_STATE_IS_STANDARD(state) || RL_STATE_IS_CUSTOM(state);
  83 }
  84
  85 /*===========================================================================*
  86  *                         sef_cb_lu_state_dump                              *
  87  *===========================================================================*/
  88 PUBLIC void sef_cb_lu_state_dump(int state)
  89 {
  90   /* Load state information. */
  91   load_state_info();
  92
  93   sef_lu_dprint("rtl8139: live update state = %d\n", state);
  94   sef_lu_dprint("rtl8139: is_reading = %d\n", is_reading);
  95   sef_lu_dprint("rtl8139: is_writing = %d\n", is_writing);
  96
  97   sef_lu_dprint("rtl8139: SEF_LU_STATE_WORK_FREE(%d) reached = %d\n",
  98       SEF_LU_STATE_WORK_FREE, TRUE);
  99   sef_lu_dprint("rtl8139: SEF_LU_STATE_REQUEST_FREE(%d) reached = %d\n",
 100       SEF_LU_STATE_REQUEST_FREE, TRUE);
 101   sef_lu_dprint("rtl8139: SEF_LU_STATE_PROTOCOL_FREE(%d) reached = %d\n",
 102       SEF_LU_STATE_PROTOCOL_FREE, (!is_reading && !is_writing));
 103   sef_lu_dprint("rtl8139: RL_STATE_READ_PROTOCOL_FREE(%d) reached = %d\n",
 104       RL_STATE_READ_PROTOCOL_FREE, (!is_reading));
 105   sef_lu_dprint("rtl8139: RL_STATE_WRITE_PROTOCOL_FREE(%d) reached = %d\n",
 106       RL_STATE_WRITE_PROTOCOL_FREE, (!is_writing));
 107 }
 108