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