aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/bcm43xx/bcm43xx_pio.h
blob: 970627bc1769acc285adc0ee04f33dcf6b2f6d94 (plain)
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
#ifndef BCM43xx_PIO_H_
#define BCM43xx_PIO_H_

#include "bcm43xx.h"

#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/skbuff.h>


#define BCM43xx_PIO_TXCTL		0x00
#define BCM43xx_PIO_TXDATA		0x02
#define BCM43xx_PIO_TXQBUFSIZE		0x04
#define BCM43xx_PIO_RXCTL		0x08
#define BCM43xx_PIO_RXDATA		0x0A

#define BCM43xx_PIO_TXCTL_WRITEHI	(1 << 0)
#define BCM43xx_PIO_TXCTL_WRITELO	(1 << 1)
#define BCM43xx_PIO_TXCTL_COMPLETE	(1 << 2)
#define BCM43xx_PIO_TXCTL_INIT		(1 << 3)
#define BCM43xx_PIO_TXCTL_SUSPEND	(1 << 7)

#define BCM43xx_PIO_RXCTL_DATAAVAILABLE	(1 << 0)
#define BCM43xx_PIO_RXCTL_READY		(1 << 1)

/* PIO constants */
#define BCM43xx_PIO_MAXTXDEVQPACKETS	31
#define BCM43xx_PIO_TXQADJUST		80

/* PIO tuning knobs */
#define BCM43xx_PIO_MAXTXPACKETS	256



#ifdef CONFIG_BCM43XX_PIO


struct bcm43xx_pioqueue;
struct bcm43xx_xmitstatus;

struct bcm43xx_pio_txpacket {
	struct bcm43xx_pioqueue *queue;
	struct ieee80211_txb *txb;
	struct list_head list;

	u8 xmitted_frags;
	u16 xmitted_octets;
};

#define pio_txpacket_getindex(packet) ((int)((packet) - (packet)->queue->tx_packets_cache)) 

struct bcm43xx_pioqueue {
	struct bcm43xx_private *bcm;
	u16 mmio_base;

	u8 tx_suspended:1,
	   need_workarounds:1; /* 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 bcm43xx_pio_txpacket tx_packets_cache[BCM43xx_PIO_MAXTXPACKETS];
};

static inline
u16 bcm43xx_pio_read(struct bcm43xx_pioqueue *queue,
		     u16 offset)
{
	return bcm43xx_read16(queue->bcm, queue->mmio_base + offset);
}

static inline
void bcm43xx_pio_write(struct bcm43xx_pioqueue *queue,
		       u16 offset, u16 value)
{
	bcm43xx_write16(queue->bcm, queue->mmio_base + offset, value);
}


int bcm43xx_pio_init(struct bcm43xx_private *bcm);
void bcm43xx_pio_free(struct bcm43xx_private *bcm);

int bcm43xx_pio_tx(struct bcm43xx_private *bcm,
		   struct ieee80211_txb *txb);
void bcm43xx_pio_handle_xmitstatus(struct bcm43xx_private *bcm,
				   struct bcm43xx_xmitstatus *status);
void bcm43xx_pio_rx(struct bcm43xx_pioqueue *queue);

#else /* CONFIG_BCM43XX_PIO */

static inline
int bcm43xx_pio_init(struct bcm43xx_private *bcm)
{
	return 0;
}
static inline
void bcm43xx_pio_free(struct bcm43xx_private *bcm)
{
}
static inline
int bcm43xx_pio_tx(struct bcm43xx_private *bcm,
		   struct ieee80211_txb *txb)
{
	return 0;
}
static inline
void bcm43xx_pio_handle_xmitstatus(struct bcm43xx_private *bcm,
				   struct bcm43xx_xmitstatus *status)
{
}
static inline
void bcm43xx_pio_rx(struct bcm43xx_pioqueue *queue)
{
}

#endif /* CONFIG_BCM43XX_PIO */
#endif /* BCM43xx_PIO_H_ */

Privacy Policy