diff options
Diffstat (limited to 'drivers/net/wireless/bcm43xx/bcm43xx_pio.h')
| -rw-r--r-- | drivers/net/wireless/bcm43xx/bcm43xx_pio.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_pio.h b/drivers/net/wireless/bcm43xx/bcm43xx_pio.h new file mode 100644 index 00000000000..970627bc176 --- /dev/null +++ b/drivers/net/wireless/bcm43xx/bcm43xx_pio.h @@ -0,0 +1,138 @@ +#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_ */ |