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
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
#ifndef B43_PIO_H_
#define B43_PIO_H_
#include "b43.h"
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/list.h>
#include <linux/skbuff.h>
#define B43_PIO_TXCTL 0x00
#define B43_PIO_TXDATA 0x02
#define B43_PIO_TXQBUFSIZE 0x04
#define B43_PIO_RXCTL 0x08
#define B43_PIO_RXDATA 0x0A
#define B43_PIO_TXCTL_WRITELO (1 << 0)
#define B43_PIO_TXCTL_WRITEHI (1 << 1)
#define B43_PIO_TXCTL_COMPLETE (1 << 2)
#define B43_PIO_TXCTL_INIT (1 << 3)
#define B43_PIO_TXCTL_SUSPEND (1 << 7)
#define B43_PIO_RXCTL_DATAAVAILABLE (1 << 0)
#define B43_PIO_RXCTL_READY (1 << 1)
/* PIO constants */
#define B43_PIO_MAXTXDEVQPACKETS 31
#define B43_PIO_TXQADJUST 80
/* PIO tuning knobs */
#define B43_PIO_MAXTXPACKETS 256
#ifdef CONFIG_B43_PIO
struct b43_pioqueue;
struct b43_xmitstatus;
struct b43_pio_txpacket {
struct b43_pioqueue *queue;
struct sk_buff *skb;
struct ieee80211_tx_status txstat;
struct list_head list;
u16 index; /* Index in the tx_packets_cache */
};
struct b43_pioqueue {
struct b43_wldev *dev;
u16 mmio_base;
bool tx_suspended;
bool tx_frozen;
bool need_workarounds; /* Workarounds needed for core.rev < 3 */
/* Adjusted size of the device internal TX buffer. */
u16 tx_devq_size;
/* Used octets of the device internal TX buffer. */
u16 tx_devq_used;
/* Used packet slots in the device internal TX buffer. */
u8 tx_devq_packets;
/* Packets from the txfree list can
* be taken on incoming TX requests.
*/
struct list_head txfree;
unsigned int nr_txfree;
/* Packets on the txqueue are queued,
* but not completely written to the chip, yet.
*/
struct list_head txqueue;
/* Packets on the txrunning queue are completely
* posted to the device. We are waiting for the txstatus.
*/
struct list_head txrunning;
/* Total number or packets sent.
* (This counter can obviously wrap).
*/
unsigned int nr_tx_packets;
struct tasklet_struct txtask;
struct b43_pio_txpacket tx_packets_cache[B43_PIO_MAXTXPACKETS];
};
static inline u16 b43_pio_read(struct b43_pioqueue *queue, u16 offset)
{
return b43_read16(queue->dev, queue->mmio_base + offset);
}
static inline
void b43_pio_write(struct b43_pioqueue *queue, u16 offset, u16 value)
{
b43_write16(queue->dev, queue->mmio_base + offset, value);
mmiowb();
}
int b43_pio_init(struct b43_wldev *dev);
void b43_pio_free(struct b43_wldev *dev);
int b43_pio_tx(struct b43_wldev *dev,
struct sk_buff *skb, struct ieee80211_tx_control *ctl);
void b43_pio_handle_txstatus(struct b43_wldev *dev,
const struct b43_txstatus *status);
void b43_pio_get_tx_stats(struct b43_wldev *dev,
struct ieee80211_tx_queue_stats *stats);
void b43_pio_rx(struct b43_pioqueue *queue);
/* Suspend TX queue in hardware. */
void b43_pio_tx_suspend(struct b43_pioqueue *queue);
void b43_pio_tx_resume(struct b43_pioqueue *queue);
/* Suspend (freeze) the TX tasklet (software level). */
void b43_pio_freeze_txqueues(struct b43_wldev *dev);
void b43_pio_thaw_txqueues(struct b43_wldev *dev);
#else /* CONFIG_B43_PIO */
static inline int b43_pio_init(struct b43_wldev *dev)
{
return 0;
}
static inline void b43_pio_free(struct b43_wldev *dev)
{
}
static inline
int b43_pio_tx(struct b43_wldev *dev,
struct sk_buff *skb, struct ieee80211_tx_control *ctl)
{
return 0;
}
static inline
void b43_pio_handle_txstatus(struct b43_wldev *dev,
const struct b43_txstatus *status)
{
}
static inline
void b43_pio_get_tx_stats(struct b43_wldev *dev,
struct ieee80211_tx_queue_stats *stats)
{
}
static inline void b43_pio_rx(struct b43_pioqueue *queue)
{
}
static inline void b43_pio_tx_suspend(struct b43_pioqueue *queue)
{
}
static inline void b43_pio_tx_resume(struct b43_pioqueue *queue)
{
}
static inline void b43_pio_freeze_txqueues(struct b43_wldev *dev)
{
}
static inline void b43_pio_thaw_txqueues(struct b43_wldev *dev)
{
}
#endif /* CONFIG_B43_PIO */
#endif /* B43_PIO_H_ */
|
