drivers/rtl8139/liveupdate.c

   1 #include "rtl8139.h"
   2
   3 /* State management variables. */
   4 EXTERN re_t re_state;
   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 static int is_reading;
  14 static int is_writing;
  15
  16 static void load_state_info(void)
  17 {
  18   re_t *rep;
  19
  20   /* Check if we are reading or writing. */
  21   rep = &re_state;
  22
  23   is_reading = !!(rep->re_flags & REF_READING);
  24   is_writing = !!(rep->re_flags & REF_SEND_AVAIL);
  25 }
  26
  27 /*===========================================================================*
  28  *                               sef_cb_lu_prepare                           *
  29  *===========================================================================*/
  30 int sef_cb_lu_prepare(int state)
  31 {
  32   int is_ready;
  33
  34   /* Load state information. */
  35   load_state_info();
  36
  37   /* Check if we are ready for the target state. */
  38   is_ready = FALSE;
  39   switch(state) {
  40       /* Standard states. */
  41       case SEF_LU_STATE_REQUEST_FREE:
  42           is_ready = TRUE;
  43       break;
  44
  45       case SEF_LU_STATE_PROTOCOL_FREE:
  46           is_ready = (!is_reading && !is_writing);
  47       break;
  48
  49       /* Custom states. */
  50       case RL_STATE_READ_PROTOCOL_FREE:
  51           is_ready = (!is_reading);
  52       break;
  53
  54       case RL_STATE_WRITE_PROTOCOL_FREE:
  55           is_ready = (!is_writing);
  56       break;
  57   }
  58
  59   /* Tell SEF if we are ready. */
  60   return is_ready ? OK : ENOTREADY;
  61 }
  62
  63 /*===========================================================================*
  64  *                        sef_cb_lu_state_isvalid                            *
  65  *===========================================================================*/
  66 int sef_cb_lu_state_isvalid(int state)
  67 {
  68   return SEF_LU_STATE_IS_STANDARD(state) || RL_STATE_IS_CUSTOM(state);
  69 }
  70
  71 /*===========================================================================*
  72  *                         sef_cb_lu_state_dump                              *
  73  *===========================================================================*/
  74 void sef_cb_lu_state_dump(int state)
  75 {
  76   /* Load state information. */
  77   load_state_info();
  78
  79   sef_lu_dprint("rtl8139: live update state = %d\n", state);
  80   sef_lu_dprint("rtl8139: is_reading = %d\n", is_reading);
  81   sef_lu_dprint("rtl8139: is_writing = %d\n", is_writing);
  82
  83   sef_lu_dprint("rtl8139: SEF_LU_STATE_WORK_FREE(%d) reached = %d\n",
  84       SEF_LU_STATE_WORK_FREE, TRUE);
  85   sef_lu_dprint("rtl8139: SEF_LU_STATE_REQUEST_FREE(%d) reached = %d\n",
  86       SEF_LU_STATE_REQUEST_FREE, TRUE);
  87   sef_lu_dprint("rtl8139: SEF_LU_STATE_PROTOCOL_FREE(%d) reached = %d\n",
  88       SEF_LU_STATE_PROTOCOL_FREE, (!is_reading && !is_writing));
  89   sef_lu_dprint("rtl8139: RL_STATE_READ_PROTOCOL_FREE(%d) reached = %d\n",
  90       RL_STATE_READ_PROTOCOL_FREE, (!is_reading));
  91   sef_lu_dprint("rtl8139: RL_STATE_WRITE_PROTOCOL_FREE(%d) reached = %d\n",
  92       RL_STATE_WRITE_PROTOCOL_FREE, (!is_writing));
  93 }
  94