diff options
Diffstat (limited to 'drivers/net/wireless/b43/pio.h')
| -rw-r--r-- | drivers/net/wireless/b43/pio.h | 230 |
1 files changed, 121 insertions, 109 deletions
diff --git a/drivers/net/wireless/b43/pio.h b/drivers/net/wireless/b43/pio.h index 3488f2447bb..1e516147424 100644 --- a/drivers/net/wireless/b43/pio.h +++ b/drivers/net/wireless/b43/pio.h @@ -8,146 +8,158 @@ #include <linux/list.h> #include <linux/skbuff.h> -#define B43_PIO_TXCTL 0x00 -#define B43_PIO_TXDATA 0x02 -#define B43_PIO_TXQBUFSIZE 0x04 -#define B43_PIO_RXCTL 0x08 -#define B43_PIO_RXDATA 0x0A - -#define B43_PIO_TXCTL_WRITELO (1 << 0) -#define B43_PIO_TXCTL_WRITEHI (1 << 1) -#define B43_PIO_TXCTL_COMPLETE (1 << 2) -#define B43_PIO_TXCTL_INIT (1 << 3) -#define B43_PIO_TXCTL_SUSPEND (1 << 7) - -#define B43_PIO_RXCTL_DATAAVAILABLE (1 << 0) -#define B43_PIO_RXCTL_READY (1 << 1) -/* PIO constants */ -#define B43_PIO_MAXTXDEVQPACKETS 31 -#define B43_PIO_TXQADJUST 80 - -/* PIO tuning knobs */ -#define B43_PIO_MAXTXPACKETS 256 - -#ifdef CONFIG_B43_PIO +/*** Registers for PIO queues up to revision 7. ***/ +/* TX queue. */ +#define B43_PIO_TXCTL 0x00 +#define B43_PIO_TXCTL_WRITELO 0x0001 +#define B43_PIO_TXCTL_WRITEHI 0x0002 +#define B43_PIO_TXCTL_EOF 0x0004 +#define B43_PIO_TXCTL_FREADY 0x0008 +#define B43_PIO_TXCTL_FLUSHREQ 0x0020 +#define B43_PIO_TXCTL_FLUSHPEND 0x0040 +#define B43_PIO_TXCTL_SUSPREQ 0x0080 +#define B43_PIO_TXCTL_QSUSP 0x0100 +#define B43_PIO_TXCTL_COMMCNT 0xFC00 +#define B43_PIO_TXCTL_COMMCNT_SHIFT 10 +#define B43_PIO_TXDATA 0x02 +#define B43_PIO_TXQBUFSIZE 0x04 +/* RX queue. */ +#define B43_PIO_RXCTL 0x00 +#define B43_PIO_RXCTL_FRAMERDY 0x0001 +#define B43_PIO_RXCTL_DATARDY 0x0002 +#define B43_PIO_RXDATA 0x02 + +/*** Registers for PIO queues revision 8 and later. ***/ +/* TX queue */ +#define B43_PIO8_TXCTL 0x00 +#define B43_PIO8_TXCTL_0_7 0x00000001 +#define B43_PIO8_TXCTL_8_15 0x00000002 +#define B43_PIO8_TXCTL_16_23 0x00000004 +#define B43_PIO8_TXCTL_24_31 0x00000008 +#define B43_PIO8_TXCTL_EOF 0x00000010 +#define B43_PIO8_TXCTL_FREADY 0x00000080 +#define B43_PIO8_TXCTL_SUSPREQ 0x00000100 +#define B43_PIO8_TXCTL_QSUSP 0x00000200 +#define B43_PIO8_TXCTL_FLUSHREQ 0x00000400 +#define B43_PIO8_TXCTL_FLUSHPEND 0x00000800 +#define B43_PIO8_TXDATA 0x04 +/* RX queue */ +#define B43_PIO8_RXCTL 0x00 +#define B43_PIO8_RXCTL_FRAMERDY 0x00000001 +#define B43_PIO8_RXCTL_DATARDY 0x00000002 +#define B43_PIO8_RXDATA 0x04 + + +/* The maximum number of TX-packets the HW can handle. */ +#define B43_PIO_MAX_NR_TXPACKETS 32 -struct b43_pioqueue; -struct b43_xmitstatus; struct b43_pio_txpacket { - struct b43_pioqueue *queue; + /* Pointer to the TX queue we belong to. */ + struct b43_pio_txqueue *queue; + /* The TX data packet. */ struct sk_buff *skb; - struct ieee80211_tx_status txstat; + /* Index in the (struct b43_pio_txqueue)->packets array. */ + u8 index; + struct list_head list; - u16 index; /* Index in the tx_packets_cache */ }; -struct b43_pioqueue { +struct b43_pio_txqueue { struct b43_wldev *dev; u16 mmio_base; - bool tx_suspended; - bool tx_frozen; - bool need_workarounds; /* 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 b43_pio_txpacket tx_packets_cache[B43_PIO_MAXTXPACKETS]; + /* The device queue buffer size in bytes. */ + u16 buffer_size; + /* The number of used bytes in the device queue buffer. */ + u16 buffer_used; + /* The number of packets that can still get queued. + * This is decremented on queueing a packet and incremented + * after receiving the transmit status. */ + u16 free_packet_slots; + + /* True, if the mac80211 queue was stopped due to overflow at TX. */ + bool stopped; + /* Our b43 queue index number */ + u8 index; + /* The mac80211 QoS queue priority. */ + u8 queue_prio; + + /* Buffer for TX packet meta data. */ + struct b43_pio_txpacket packets[B43_PIO_MAX_NR_TXPACKETS]; + struct list_head packets_list; + + /* Shortcut to the 802.11 core revision. This is to + * avoid horrible pointer dereferencing in the fastpaths. */ + u8 rev; }; -static inline u16 b43_pio_read(struct b43_pioqueue *queue, u16 offset) -{ - return b43_read16(queue->dev, queue->mmio_base + offset); -} - -static inline - void b43_pio_write(struct b43_pioqueue *queue, u16 offset, u16 value) -{ - b43_write16(queue->dev, queue->mmio_base + offset, value); - mmiowb(); -} - -int b43_pio_init(struct b43_wldev *dev); -void b43_pio_free(struct b43_wldev *dev); - -int b43_pio_tx(struct b43_wldev *dev, - struct sk_buff *skb, struct ieee80211_tx_control *ctl); -void b43_pio_handle_txstatus(struct b43_wldev *dev, - const struct b43_txstatus *status); -void b43_pio_get_tx_stats(struct b43_wldev *dev, - struct ieee80211_tx_queue_stats *stats); -void b43_pio_rx(struct b43_pioqueue *queue); +struct b43_pio_rxqueue { + struct b43_wldev *dev; + u16 mmio_base; -/* Suspend TX queue in hardware. */ -void b43_pio_tx_suspend(struct b43_pioqueue *queue); -void b43_pio_tx_resume(struct b43_pioqueue *queue); -/* Suspend (freeze) the TX tasklet (software level). */ -void b43_pio_freeze_txqueues(struct b43_wldev *dev); -void b43_pio_thaw_txqueues(struct b43_wldev *dev); + /* Shortcut to the 802.11 core revision. This is to + * avoid horrible pointer dereferencing in the fastpaths. */ + u8 rev; +}; -#else /* CONFIG_B43_PIO */ -static inline int b43_pio_init(struct b43_wldev *dev) +static inline u16 b43_piotx_read16(struct b43_pio_txqueue *q, u16 offset) { - return 0; + return b43_read16(q->dev, q->mmio_base + offset); } -static inline void b43_pio_free(struct b43_wldev *dev) -{ -} -static inline - int b43_pio_tx(struct b43_wldev *dev, - struct sk_buff *skb, struct ieee80211_tx_control *ctl) -{ - return 0; -} -static inline - void b43_pio_handle_txstatus(struct b43_wldev *dev, - const struct b43_txstatus *status) + +static inline u32 b43_piotx_read32(struct b43_pio_txqueue *q, u16 offset) { + return b43_read32(q->dev, q->mmio_base + offset); } -static inline - void b43_pio_get_tx_stats(struct b43_wldev *dev, - struct ieee80211_tx_queue_stats *stats) + +static inline void b43_piotx_write16(struct b43_pio_txqueue *q, + u16 offset, u16 value) { + b43_write16(q->dev, q->mmio_base + offset, value); } -static inline void b43_pio_rx(struct b43_pioqueue *queue) + +static inline void b43_piotx_write32(struct b43_pio_txqueue *q, + u16 offset, u32 value) { + b43_write32(q->dev, q->mmio_base + offset, value); } -static inline void b43_pio_tx_suspend(struct b43_pioqueue *queue) + + +static inline u16 b43_piorx_read16(struct b43_pio_rxqueue *q, u16 offset) { + return b43_read16(q->dev, q->mmio_base + offset); } -static inline void b43_pio_tx_resume(struct b43_pioqueue *queue) + +static inline u32 b43_piorx_read32(struct b43_pio_rxqueue *q, u16 offset) { + return b43_read32(q->dev, q->mmio_base + offset); } -static inline void b43_pio_freeze_txqueues(struct b43_wldev *dev) + +static inline void b43_piorx_write16(struct b43_pio_rxqueue *q, + u16 offset, u16 value) { + b43_write16(q->dev, q->mmio_base + offset, value); } -static inline void b43_pio_thaw_txqueues(struct b43_wldev *dev) + +static inline void b43_piorx_write32(struct b43_pio_rxqueue *q, + u16 offset, u32 value) { + b43_write32(q->dev, q->mmio_base + offset, value); } -#endif /* CONFIG_B43_PIO */ + +int b43_pio_init(struct b43_wldev *dev); +void b43_pio_free(struct b43_wldev *dev); + +int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb); +void b43_pio_handle_txstatus(struct b43_wldev *dev, + const struct b43_txstatus *status); +void b43_pio_rx(struct b43_pio_rxqueue *q); + +void b43_pio_tx_suspend(struct b43_wldev *dev); +void b43_pio_tx_resume(struct b43_wldev *dev); + #endif /* B43_PIO_H_ */ |