package/bcm43xx-mac80211/src/bcm43xx/bcm43xx_pio.h

   1 #ifndef BCM43xx_PIO_H_
   2 #define BCM43xx_PIO_H_
   3
   4 #include "bcm43xx.h"
   5
   6 #include <linux/interrupt.h>
   7 #include <linux/list.h>
   8 #include <linux/skbuff.h>
   9
  10
  11 #define BCM43xx_PIO_TXCTL               0x00
  12 #define BCM43xx_PIO_TXDATA              0x02
  13 #define BCM43xx_PIO_TXQBUFSIZE          0x04
  14 #define BCM43xx_PIO_RXCTL               0x08
  15 #define BCM43xx_PIO_RXDATA              0x0A
  16
  17 #define BCM43xx_PIO_TXCTL_WRITELO       (1 << 0)
  18 #define BCM43xx_PIO_TXCTL_WRITEHI       (1 << 1)
  19 #define BCM43xx_PIO_TXCTL_COMPLETE      (1 << 2)
  20 #define BCM43xx_PIO_TXCTL_INIT          (1 << 3)
  21 #define BCM43xx_PIO_TXCTL_SUSPEND       (1 << 7)
  22
  23 #define BCM43xx_PIO_RXCTL_DATAAVAILABLE (1 << 0)
  24 #define BCM43xx_PIO_RXCTL_READY         (1 << 1)
  25
  26 /* PIO constants */
  27 #define BCM43xx_PIO_MAXTXDEVQPACKETS    31
  28 #define BCM43xx_PIO_TXQADJUST           80
  29
  30 /* PIO tuning knobs */
  31 #define BCM43xx_PIO_MAXTXPACKETS        256
  32
  33
  34
  35 #ifdef CONFIG_BCM43XX_MAC80211_PIO
  36
  37
  38 struct bcm43xx_pioqueue;
  39 struct bcm43xx_xmitstatus;
  40
  41 struct bcm43xx_pio_txpacket {
  42         struct bcm43xx_pioqueue *queue;
  43         struct sk_buff *skb;
  44         struct ieee80211_tx_status txstat;
  45         struct list_head list;
  46 };
  47
  48 #define pio_txpacket_getindex(packet) ((int)((packet) - (packet)->queue->tx_packets_cache))
  49
  50 struct bcm43xx_pioqueue {
  51         struct bcm43xx_wldev *dev;
  52         u16 mmio_base;
  53
  54         u8 tx_suspended:1,
  55            tx_frozen:1,
  56            need_workarounds:1; /* Workarounds needed for core.rev < 3 */
  57
  58         /* Adjusted size of the device internal TX buffer. */
  59         u16 tx_devq_size;
  60         /* Used octets of the device internal TX buffer. */
  61         u16 tx_devq_used;
  62         /* Used packet slots in the device internal TX buffer. */
  63         u8 tx_devq_packets;
  64         /* Packets from the txfree list can
  65          * be taken on incoming TX requests.
  66          */
  67         struct list_head txfree;
  68         unsigned int nr_txfree;
  69         /* Packets on the txqueue are queued,
  70          * but not completely written to the chip, yet.
  71          */
  72         struct list_head txqueue;
  73         /* Packets on the txrunning queue are completely
  74          * posted to the device. We are waiting for the txstatus.
  75          */
  76         struct list_head txrunning;
  77         /* Total number or packets sent.
  78          * (This counter can obviously wrap).
  79          */
  80         unsigned int nr_tx_packets;
  81         struct tasklet_struct txtask;
  82         struct bcm43xx_pio_txpacket tx_packets_cache[BCM43xx_PIO_MAXTXPACKETS];
  83 };
  84
  85 static inline
  86 u16 bcm43xx_pio_read(struct bcm43xx_pioqueue *queue,
  87                      u16 offset)
  88 {
  89         return bcm43xx_read16(queue->dev, queue->mmio_base + offset);
  90 }
  91
  92 static inline
  93 void bcm43xx_pio_write(struct bcm43xx_pioqueue *queue,
  94                        u16 offset, u16 value)
  95 {
  96         bcm43xx_write16(queue->dev, queue->mmio_base + offset, value);
  97         mmiowb();
  98 }
  99
 100
 101 int bcm43xx_pio_init(struct bcm43xx_wldev *dev);
 102 void bcm43xx_pio_free(struct bcm43xx_wldev *dev);
 103
 104 int bcm43xx_pio_tx(struct bcm43xx_wldev *dev,
 105                    struct sk_buff *skb,
 106                    struct ieee80211_tx_control *ctl);
 107 void bcm43xx_pio_handle_txstatus(struct bcm43xx_wldev *dev,
 108                                  const struct bcm43xx_txstatus *status);
 109 void bcm43xx_pio_get_tx_stats(struct bcm43xx_wldev *dev,
 110                               struct ieee80211_tx_queue_stats *stats);
 111 void bcm43xx_pio_rx(struct bcm43xx_pioqueue *queue);
 112
 113 /* Suspend TX queue in hardware. */
 114 void bcm43xx_pio_tx_suspend(struct bcm43xx_pioqueue *queue);
 115 void bcm43xx_pio_tx_resume(struct bcm43xx_pioqueue *queue);
 116 /* Suspend (freeze) the TX tasklet (software level). */
 117 void bcm43xx_pio_freeze_txqueues(struct bcm43xx_wldev *dev);
 118 void bcm43xx_pio_thaw_txqueues(struct bcm43xx_wldev *dev);
 119
 120 #else /* CONFIG_BCM43XX_MAC80211_PIO */
 121
 122 static inline
 123 int bcm43xx_pio_init(struct bcm43xx_wldev *dev)
 124 {
 125         return 0;
 126 }
 127 static inline
 128 void bcm43xx_pio_free(struct bcm43xx_wldev *dev)
 129 {
 130 }
 131 static inline
 132 int bcm43xx_pio_tx(struct bcm43xx_wldev *dev,
 133                    struct sk_buff *skb,
 134                    struct ieee80211_tx_control *ctl)
 135 {
 136         return 0;
 137 }
 138 static inline
 139 void bcm43xx_pio_handle_txstatus(struct bcm43xx_wldev *dev,
 140                                  const struct bcm43xx_txstatus *status)
 141 {
 142 }
 143 static inline
 144 void bcm43xx_pio_get_tx_stats(struct bcm43xx_wldev *dev,
 145                               struct ieee80211_tx_queue_stats *stats)
 146 {
 147 }
 148 static inline
 149 void bcm43xx_pio_rx(struct bcm43xx_pioqueue *queue)
 150 {
 151 }
 152 static inline
 153 void bcm43xx_pio_tx_suspend(struct bcm43xx_pioqueue *queue)
 154 {
 155 }
 156 static inline
 157 void bcm43xx_pio_tx_resume(struct bcm43xx_pioqueue *queue)
 158 {
 159 }
 160 static inline
 161 void bcm43xx_pio_freeze_txqueues(struct bcm43xx_wldev *dev)
 162 {
 163 }
 164 static inline
 165 void bcm43xx_pio_thaw_txqueues(struct bcm43xx_wldev *dev)
 166 {
 167 }
 168
 169 #endif /* CONFIG_BCM43XX_MAC80211_PIO */
 170 #endif /* BCM43xx_PIO_H_ */