package/b43/src/pio.h

   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
 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
 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
 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
 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
 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
 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
 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
 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
 182 static inline int b43_pio_init(struct b43_wldev *dev)
 183 {
 184         return 0;
 185 }
 186 static inline void b43_pio_free(struct b43_wldev *dev)
 187 {
 188 }
 189 static inline void b43_pio_stop(struct b43_wldev *dev)
 190 {
 191 }
 192 static inline int b43_pio_tx(struct b43_wldev *dev,
 193                              struct sk_buff *skb)
 194 {
 195         return 0;
 196 }
 197 static inline void b43_pio_handle_txstatus(struct b43_wldev *dev,
 198                                            const struct b43_txstatus *status)
 199 {
 200 }
 201 static inline void b43_pio_get_tx_stats(struct b43_wldev *dev,
 202                                         struct ieee80211_tx_queue_stats *stats)
 203 {
 204 }
 205 static inline void b43_pio_rx(struct b43_pio_rxqueue *q)
 206 {
 207 }
 208 static inline void b43_pio_tx_suspend(struct b43_wldev *dev)
 209 {
 210 }
 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_ */