1 #ifndef B43_PIO_H_
2 #define B43_PIO_H_
3
4 #include "b43.h"
5
6 #include <linux/interrupt.h>
7 #include <linux/io.h>
8 #include <linux/list.h>
9 #include <linux/skbuff.h>
10
11
12 /*** Registers for PIO queues up to revision 7. ***/
13 /* TX queue. */
14 #define B43_PIO_TXCTL 0x00
15 #define B43_PIO_TXCTL_WRITELO 0x0001
16 #define B43_PIO_TXCTL_WRITEHI 0x0002
17 #define B43_PIO_TXCTL_EOF 0x0004
18 #define B43_PIO_TXCTL_FREADY 0x0008
19 #define B43_PIO_TXCTL_FLUSHREQ 0x0020
20 #define B43_PIO_TXCTL_FLUSHPEND 0x0040
21 #define B43_PIO_TXCTL_SUSPREQ 0x0080
22 #define B43_PIO_TXCTL_QSUSP 0x0100
23 #define B43_PIO_TXCTL_COMMCNT 0xFC00
24 #define B43_PIO_TXCTL_COMMCNT_SHIFT 10
25 #define B43_PIO_TXDATA 0x02
26 #define B43_PIO_TXQBUFSIZE 0x04
27 /* RX queue. */
28 #define B43_PIO_RXCTL 0x00
29 #define B43_PIO_RXCTL_FRAMERDY 0x0001
30 #define B43_PIO_RXCTL_DATARDY 0x0002
31 #define B43_PIO_RXDATA 0x02
32
33 /*** Registers for PIO queues revision 8 and later. ***/
34 /* TX queue */
35 #define B43_PIO8_TXCTL 0x00
36 #define B43_PIO8_TXCTL_0_7 0x00000001
37 #define B43_PIO8_TXCTL_8_15 0x00000002
38 #define B43_PIO8_TXCTL_16_23 0x00000004
39 #define B43_PIO8_TXCTL_24_31 0x00000008
40 #define B43_PIO8_TXCTL_EOF 0x00000010
41 #define B43_PIO8_TXCTL_FREADY 0x00000080
42 #define B43_PIO8_TXCTL_SUSPREQ 0x00000100
43 #define B43_PIO8_TXCTL_QSUSP 0x00000200
44 #define B43_PIO8_TXCTL_FLUSHREQ 0x00000400
45 #define B43_PIO8_TXCTL_FLUSHPEND 0x00000800
46 #define B43_PIO8_TXDATA 0x04
47 /* RX queue */
48 #define B43_PIO8_RXCTL 0x00
49 #define B43_PIO8_RXCTL_FRAMERDY 0x00000001
50 #define B43_PIO8_RXCTL_DATARDY 0x00000002
51 #define B43_PIO8_RXDATA 0x04
52
53
54 /* The maximum number of TX-packets the HW can handle. */
55 #define B43_PIO_MAX_NR_TXPACKETS 32
56
57
58 #ifdef CONFIG_B43_PIO
59
60 struct b43_pio_txpacket {
61 /* Pointer to the TX queue we belong to. */
62 struct b43_pio_txqueue *queue;
63 /* The TX data packet. */
64 struct sk_buff *skb;
65 /* Index in the (struct b43_pio_txqueue)->packets array. */
66 u8 index;
67
68 struct list_head list;
69 };
70
71 struct b43_pio_txqueue {
72 struct b43_wldev *dev;
73 spinlock_t lock;
74 u16 mmio_base;
75
76 /* The device queue buffer size in bytes. */
77 u16 buffer_size;
78 /* The number of used bytes in the device queue buffer. */
79 u16 buffer_used;
80 /* The number of packets that can still get queued.
81 * This is decremented on queueing a packet and incremented
82 * after receiving the transmit status. */
83 u16 free_packet_slots;
84
85 /* True, if the mac80211 queue was stopped due to overflow at TX. */
86 bool stopped;
87 /* Our b43 queue index number */
88 u8 index;
89 /* The mac80211 QoS queue priority. */
90 u8 queue_prio;
91
92 /* Buffer for TX packet meta data. */
93 struct b43_pio_txpacket packets[B43_PIO_MAX_NR_TXPACKETS];
94 struct list_head packets_list;
95
96 /* Total number of transmitted packets. */
97 unsigned int nr_tx_packets;
98
99 /* Shortcut to the 802.11 core revision. This is to
100 * avoid horrible pointer dereferencing in the fastpaths. */
101 u8 rev;
102 };
103
104 struct b43_pio_rxqueue {
105 struct b43_wldev *dev;
106 spinlock_t lock;
107 u16 mmio_base;
108
109 /* Work to reduce latency issues on RX. */
110 struct work_struct rx_work;
111
112 /* Shortcut to the 802.11 core revision. This is to
113 * avoid horrible pointer dereferencing in the fastpaths. */
114 u8 rev;
115 };
116
117
b43_piotx_read16(struct b43_pio_txqueue * q,u16 offset)118 static inline u16 b43_piotx_read16(struct b43_pio_txqueue *q, u16 offset)
119 {
120 return b43_read16(q->dev, q->mmio_base + offset);
121 }
122
b43_piotx_read32(struct b43_pio_txqueue * q,u16 offset)123 static inline u32 b43_piotx_read32(struct b43_pio_txqueue *q, u16 offset)
124 {
125 return b43_read32(q->dev, q->mmio_base + offset);
126 }
127
b43_piotx_write16(struct b43_pio_txqueue * q,u16 offset,u16 value)128 static inline void b43_piotx_write16(struct b43_pio_txqueue *q,
129 u16 offset, u16 value)
130 {
131 b43_write16(q->dev, q->mmio_base + offset, value);
132 }
133
b43_piotx_write32(struct b43_pio_txqueue * q,u16 offset,u32 value)134 static inline void b43_piotx_write32(struct b43_pio_txqueue *q,
135 u16 offset, u32 value)
136 {
137 b43_write32(q->dev, q->mmio_base + offset, value);
138 }
139
140
b43_piorx_read16(struct b43_pio_rxqueue * q,u16 offset)141 static inline u16 b43_piorx_read16(struct b43_pio_rxqueue *q, u16 offset)
142 {
143 return b43_read16(q->dev, q->mmio_base + offset);
144 }
145
b43_piorx_read32(struct b43_pio_rxqueue * q,u16 offset)146 static inline u32 b43_piorx_read32(struct b43_pio_rxqueue *q, u16 offset)
147 {
148 return b43_read32(q->dev, q->mmio_base + offset);
149 }
150
b43_piorx_write16(struct b43_pio_rxqueue * q,u16 offset,u16 value)151 static inline void b43_piorx_write16(struct b43_pio_rxqueue *q,
152 u16 offset, u16 value)
153 {
154 b43_write16(q->dev, q->mmio_base + offset, value);
155 }
156
b43_piorx_write32(struct b43_pio_rxqueue * q,u16 offset,u32 value)157 static inline void b43_piorx_write32(struct b43_pio_rxqueue *q,
158 u16 offset, u32 value)
159 {
160 b43_write32(q->dev, q->mmio_base + offset, value);
161 }
162
163
164 int b43_pio_init(struct b43_wldev *dev);
165 void b43_pio_stop(struct b43_wldev *dev);
166 void b43_pio_free(struct b43_wldev *dev);
167
168 int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb);
169 void b43_pio_handle_txstatus(struct b43_wldev *dev,
170 const struct b43_txstatus *status);
171 void b43_pio_get_tx_stats(struct b43_wldev *dev,
172 struct ieee80211_tx_queue_stats *stats);
173 void b43_pio_rx(struct b43_pio_rxqueue *q);
174
175 void b43_pio_tx_suspend(struct b43_wldev *dev);
176 void b43_pio_tx_resume(struct b43_wldev *dev);
177
178
179 #else /* CONFIG_B43_PIO */
180
181
b43_pio_init(struct b43_wldev * dev)182 static inline int b43_pio_init(struct b43_wldev *dev)
183 {
184 return 0;
185 }
b43_pio_free(struct b43_wldev * dev)186 static inline void b43_pio_free(struct b43_wldev *dev)
187 {
188 }
b43_pio_stop(struct b43_wldev * dev)189 static inline void b43_pio_stop(struct b43_wldev *dev)
190 {
191 }
b43_pio_tx(struct b43_wldev * dev,struct sk_buff * skb)192 static inline int b43_pio_tx(struct b43_wldev *dev,
193 struct sk_buff *skb)
194 {
195 return 0;
196 }
b43_pio_handle_txstatus(struct b43_wldev * dev,const struct b43_txstatus * status)197 static inline void b43_pio_handle_txstatus(struct b43_wldev *dev,
198 const struct b43_txstatus *status)
199 {
200 }
b43_pio_get_tx_stats(struct b43_wldev * dev,struct ieee80211_tx_queue_stats * stats)201 static inline void b43_pio_get_tx_stats(struct b43_wldev *dev,
202 struct ieee80211_tx_queue_stats *stats)
203 {
204 }
b43_pio_rx(struct b43_pio_rxqueue * q)205 static inline void b43_pio_rx(struct b43_pio_rxqueue *q)
206 {
207 }
b43_pio_tx_suspend(struct b43_wldev * dev)208 static inline void b43_pio_tx_suspend(struct b43_wldev *dev)
209 {
210 }
b43_pio_tx_resume(struct b43_wldev * dev)211 static inline void b43_pio_tx_resume(struct b43_wldev *dev)
212 {
213 }
214
215 #endif /* CONFIG_B43_PIO */
216 #endif /* B43_PIO_H_ */
217