drivers/net/wireless/bcm43xx/bcm43xx_pio.h

   1 #ifndef BCM43xx_PIO_H_
   2 #define BCM43xx_PIO_H_
   3
   4 #include "bcm43xx.h"
   5
   6 #include <linux/list.h>
   7 #include <linux/spinlock.h>
   8 #include <linux/workqueue.h>
   9 #include <linux/skbuff.h>
  10
  11
  12 #define BCM43xx_PIO_TXCTL               0x00
  13 #define BCM43xx_PIO_TXDATA              0x02
  14 #define BCM43xx_PIO_TXQBUFSIZE          0x04
  15 #define BCM43xx_PIO_RXCTL               0x08
  16 #define BCM43xx_PIO_RXDATA              0x0A
  17
  18 #define BCM43xx_PIO_TXCTL_WRITEHI       (1 << 0)
  19 #define BCM43xx_PIO_TXCTL_WRITELO       (1 << 1)
  20 #define BCM43xx_PIO_TXCTL_COMPLETE      (1 << 2)
  21 #define BCM43xx_PIO_TXCTL_INIT          (1 << 3)
  22 #define BCM43xx_PIO_TXCTL_SUSPEND       (1 << 7)
  23
  24 #define BCM43xx_PIO_RXCTL_DATAAVAILABLE (1 << 0)
  25 #define BCM43xx_PIO_RXCTL_READY         (1 << 1)
  26
  27 /* PIO constants */
  28 #define BCM43xx_PIO_MAXTXDEVQPACKETS    31
  29 #define BCM43xx_PIO_TXQADJUST           80
  30
  31 /* PIO tuning knobs */
  32 #define BCM43xx_PIO_MAXTXPACKETS        256
  33
  34
  35 struct bcm43xx_pioqueue;
  36 struct bcm43xx_xmitstatus;
  37
  38 struct bcm43xx_pio_txpacket {
  39         struct bcm43xx_pioqueue *queue;
  40         struct ieee80211_txb *txb;
  41         struct list_head list;
  42
  43         u8 xmitted_frags;
  44         u16 xmitted_octets;
  45 };
  46
  47 #define pio_txpacket_getindex(packet) ((int)((packet) - (packet)->queue->__tx_packets_cache))
  48
  49 struct bcm43xx_pioqueue {
  50         struct bcm43xx_private *bcm;
  51         u16 mmio_base;
  52
  53         u8 tx_suspended:1;
  54
  55         /* Adjusted size of the device internal TX buffer. */
  56         u16 tx_devq_size;
  57         /* Used octets of the device internal TX buffer. */
  58         u16 tx_devq_used;
  59         /* Used packet slots in the device internal TX buffer. */
  60         u8 tx_devq_packets;
  61         /* Packets from the txfree list can
  62          * be taken on incoming TX requests.
  63          */
  64         struct list_head txfree;
  65         /* Packets on the txqueue are queued,
  66          * but not completely written to the chip, yet.
  67          */
  68         struct list_head txqueue;
  69         /* Packets on the txrunning queue are completely
  70          * posted to the device. We are waiting for the txstatus.
  71          */
  72         struct list_head txrunning;
  73         /* Locking of the TX queues and the accounting. */
  74         spinlock_t txlock;
  75         struct work_struct txwork;
  76         struct bcm43xx_pio_txpacket __tx_packets_cache[BCM43xx_PIO_MAXTXPACKETS];
  77 };
  78
  79 int bcm43xx_pio_init(struct bcm43xx_private *bcm);
  80 void bcm43xx_pio_free(struct bcm43xx_private *bcm);
  81
  82 int FASTCALL(bcm43xx_pio_transfer_txb(struct bcm43xx_private *bcm,
  83                                       struct ieee80211_txb *txb));
  84 void FASTCALL(bcm43xx_pio_handle_xmitstatus(struct bcm43xx_private *bcm,
  85                                             struct bcm43xx_xmitstatus *status));
  86
  87 void FASTCALL(bcm43xx_pio_rx(struct bcm43xx_pioqueue *queue));
  88 #endif /* BCM43xx_PIO_H_ */