| Michael Buesch | e4d6b79 | 2007-09-18 15:39:42 -0400 | [diff] [blame] | 1 | #ifndef B43_PIO_H_ |
| 2 | #define B43_PIO_H_ |
| 3 | |
| 4 | #include "b43.h" |
| 5 | |
| 6 | #include <linux/interrupt.h> |
| 7 | #include <linux/list.h> |
| 8 | #include <linux/skbuff.h> |
| 9 | |
| 10 | #define B43_PIO_TXCTL 0x00 |
| 11 | #define B43_PIO_TXDATA 0x02 |
| 12 | #define B43_PIO_TXQBUFSIZE 0x04 |
| 13 | #define B43_PIO_RXCTL 0x08 |
| 14 | #define B43_PIO_RXDATA 0x0A |
| 15 | |
| 16 | #define B43_PIO_TXCTL_WRITELO (1 << 0) |
| 17 | #define B43_PIO_TXCTL_WRITEHI (1 << 1) |
| 18 | #define B43_PIO_TXCTL_COMPLETE (1 << 2) |
| 19 | #define B43_PIO_TXCTL_INIT (1 << 3) |
| 20 | #define B43_PIO_TXCTL_SUSPEND (1 << 7) |
| 21 | |
| 22 | #define B43_PIO_RXCTL_DATAAVAILABLE (1 << 0) |
| 23 | #define B43_PIO_RXCTL_READY (1 << 1) |
| 24 | |
| 25 | /* PIO constants */ |
| 26 | #define B43_PIO_MAXTXDEVQPACKETS 31 |
| 27 | #define B43_PIO_TXQADJUST 80 |
| 28 | |
| 29 | /* PIO tuning knobs */ |
| 30 | #define B43_PIO_MAXTXPACKETS 256 |
| 31 | |
| 32 | #ifdef CONFIG_B43_PIO |
| 33 | |
| 34 | struct b43_pioqueue; |
| 35 | struct b43_xmitstatus; |
| 36 | |
| 37 | struct b43_pio_txpacket { |
| 38 | struct b43_pioqueue *queue; |
| 39 | struct sk_buff *skb; |
| 40 | struct ieee80211_tx_status txstat; |
| 41 | struct list_head list; |
| Michael Buesch | 1a09404 | 2007-09-20 11:13:40 -0700 | [diff] [blame^] | 42 | u16 index; /* Index in the tx_packets_cache */ |
| Michael Buesch | e4d6b79 | 2007-09-18 15:39:42 -0400 | [diff] [blame] | 43 | }; |
| 44 | |
| Michael Buesch | e4d6b79 | 2007-09-18 15:39:42 -0400 | [diff] [blame] | 45 | struct b43_pioqueue { |
| 46 | struct b43_wldev *dev; |
| 47 | u16 mmio_base; |
| 48 | |
| 49 | bool tx_suspended; |
| 50 | bool tx_frozen; |
| 51 | bool need_workarounds; /* Workarounds needed for core.rev < 3 */ |
| 52 | |
| 53 | /* Adjusted size of the device internal TX buffer. */ |
| 54 | u16 tx_devq_size; |
| 55 | /* Used octets of the device internal TX buffer. */ |
| 56 | u16 tx_devq_used; |
| 57 | /* Used packet slots in the device internal TX buffer. */ |
| 58 | u8 tx_devq_packets; |
| 59 | /* Packets from the txfree list can |
| 60 | * be taken on incoming TX requests. |
| 61 | */ |
| 62 | struct list_head txfree; |
| 63 | unsigned int nr_txfree; |
| 64 | /* Packets on the txqueue are queued, |
| 65 | * but not completely written to the chip, yet. |
| 66 | */ |
| 67 | struct list_head txqueue; |
| 68 | /* Packets on the txrunning queue are completely |
| 69 | * posted to the device. We are waiting for the txstatus. |
| 70 | */ |
| 71 | struct list_head txrunning; |
| 72 | /* Total number or packets sent. |
| 73 | * (This counter can obviously wrap). |
| 74 | */ |
| 75 | unsigned int nr_tx_packets; |
| 76 | struct tasklet_struct txtask; |
| 77 | struct b43_pio_txpacket tx_packets_cache[B43_PIO_MAXTXPACKETS]; |
| 78 | }; |
| 79 | |
| 80 | static inline u16 b43_pio_read(struct b43_pioqueue *queue, u16 offset) |
| 81 | { |
| 82 | return b43_read16(queue->dev, queue->mmio_base + offset); |
| 83 | } |
| 84 | |
| 85 | static inline |
| 86 | void b43_pio_write(struct b43_pioqueue *queue, u16 offset, u16 value) |
| 87 | { |
| 88 | b43_write16(queue->dev, queue->mmio_base + offset, value); |
| 89 | mmiowb(); |
| 90 | } |
| 91 | |
| 92 | int b43_pio_init(struct b43_wldev *dev); |
| 93 | void b43_pio_free(struct b43_wldev *dev); |
| 94 | |
| 95 | int b43_pio_tx(struct b43_wldev *dev, |
| 96 | struct sk_buff *skb, struct ieee80211_tx_control *ctl); |
| 97 | void b43_pio_handle_txstatus(struct b43_wldev *dev, |
| 98 | const struct b43_txstatus *status); |
| 99 | void b43_pio_get_tx_stats(struct b43_wldev *dev, |
| 100 | struct ieee80211_tx_queue_stats *stats); |
| 101 | void b43_pio_rx(struct b43_pioqueue *queue); |
| 102 | |
| 103 | /* Suspend TX queue in hardware. */ |
| 104 | void b43_pio_tx_suspend(struct b43_pioqueue *queue); |
| 105 | void b43_pio_tx_resume(struct b43_pioqueue *queue); |
| 106 | /* Suspend (freeze) the TX tasklet (software level). */ |
| 107 | void b43_pio_freeze_txqueues(struct b43_wldev *dev); |
| 108 | void b43_pio_thaw_txqueues(struct b43_wldev *dev); |
| 109 | |
| 110 | #else /* CONFIG_B43_PIO */ |
| 111 | |
| 112 | static inline int b43_pio_init(struct b43_wldev *dev) |
| 113 | { |
| 114 | return 0; |
| 115 | } |
| 116 | static inline void b43_pio_free(struct b43_wldev *dev) |
| 117 | { |
| 118 | } |
| 119 | static inline |
| 120 | int b43_pio_tx(struct b43_wldev *dev, |
| 121 | struct sk_buff *skb, struct ieee80211_tx_control *ctl) |
| 122 | { |
| 123 | return 0; |
| 124 | } |
| 125 | static inline |
| 126 | void b43_pio_handle_txstatus(struct b43_wldev *dev, |
| 127 | const struct b43_txstatus *status) |
| 128 | { |
| 129 | } |
| 130 | static inline |
| 131 | void b43_pio_get_tx_stats(struct b43_wldev *dev, |
| 132 | struct ieee80211_tx_queue_stats *stats) |
| 133 | { |
| 134 | } |
| 135 | static inline void b43_pio_rx(struct b43_pioqueue *queue) |
| 136 | { |
| 137 | } |
| 138 | static inline void b43_pio_tx_suspend(struct b43_pioqueue *queue) |
| 139 | { |
| 140 | } |
| 141 | static inline void b43_pio_tx_resume(struct b43_pioqueue *queue) |
| 142 | { |
| 143 | } |
| 144 | static inline void b43_pio_freeze_txqueues(struct b43_wldev *dev) |
| 145 | { |
| 146 | } |
| 147 | static inline void b43_pio_thaw_txqueues(struct b43_wldev *dev) |
| 148 | { |
| 149 | } |
| 150 | |
| 151 | #endif /* CONFIG_B43_PIO */ |
| 152 | #endif /* B43_PIO_H_ */ |