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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 | /* SPDX-License-Identifier: GPL-2.0 */ #ifndef B43legacy_PIO_H_ #define B43legacy_PIO_H_ #include "b43legacy.h" #include <linux/interrupt.h> #include <linux/list.h> #include <linux/skbuff.h> #define B43legacy_PIO_TXCTL 0x00 #define B43legacy_PIO_TXDATA 0x02 #define B43legacy_PIO_TXQBUFSIZE 0x04 #define B43legacy_PIO_RXCTL 0x08 #define B43legacy_PIO_RXDATA 0x0A #define B43legacy_PIO_TXCTL_WRITELO (1 << 0) #define B43legacy_PIO_TXCTL_WRITEHI (1 << 1) #define B43legacy_PIO_TXCTL_COMPLETE (1 << 2) #define B43legacy_PIO_TXCTL_INIT (1 << 3) #define B43legacy_PIO_TXCTL_SUSPEND (1 << 7) #define B43legacy_PIO_RXCTL_DATAAVAILABLE (1 << 0) #define B43legacy_PIO_RXCTL_READY (1 << 1) /* PIO constants */ #define B43legacy_PIO_MAXTXDEVQPACKETS 31 #define B43legacy_PIO_TXQADJUST 80 /* PIO tuning knobs */ #define B43legacy_PIO_MAXTXPACKETS 256 #ifdef CONFIG_B43LEGACY_PIO struct b43legacy_pioqueue; struct b43legacy_xmitstatus; struct b43legacy_pio_txpacket { struct b43legacy_pioqueue *queue; struct sk_buff *skb; struct list_head list; }; #define pio_txpacket_getindex(packet) ((int)((packet) - \ (packet)->queue->tx_packets_cache)) struct b43legacy_pioqueue { struct b43legacy_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; struct tasklet_struct txtask; struct b43legacy_pio_txpacket tx_packets_cache[B43legacy_PIO_MAXTXPACKETS]; }; static inline u16 b43legacy_pio_read(struct b43legacy_pioqueue *queue, u16 offset) { return b43legacy_read16(queue->dev, queue->mmio_base + offset); } static inline void b43legacy_pio_write(struct b43legacy_pioqueue *queue, u16 offset, u16 value) { b43legacy_write16(queue->dev, queue->mmio_base + offset, value); } int b43legacy_pio_init(struct b43legacy_wldev *dev); void b43legacy_pio_free(struct b43legacy_wldev *dev); int b43legacy_pio_tx(struct b43legacy_wldev *dev, struct sk_buff *skb); void b43legacy_pio_handle_txstatus(struct b43legacy_wldev *dev, const struct b43legacy_txstatus *status); void b43legacy_pio_rx(struct b43legacy_pioqueue *queue); /* Suspend TX queue in hardware. */ void b43legacy_pio_tx_suspend(struct b43legacy_pioqueue *queue); void b43legacy_pio_tx_resume(struct b43legacy_pioqueue *queue); /* Suspend (freeze) the TX tasklet (software level). */ void b43legacy_pio_freeze_txqueues(struct b43legacy_wldev *dev); void b43legacy_pio_thaw_txqueues(struct b43legacy_wldev *dev); #else /* CONFIG_B43LEGACY_PIO */ static inline int b43legacy_pio_init(struct b43legacy_wldev *dev) { return 0; } static inline void b43legacy_pio_free(struct b43legacy_wldev *dev) { } static inline int b43legacy_pio_tx(struct b43legacy_wldev *dev, struct sk_buff *skb) { return 0; } static inline void b43legacy_pio_handle_txstatus(struct b43legacy_wldev *dev, const struct b43legacy_txstatus *status) { } static inline void b43legacy_pio_rx(struct b43legacy_pioqueue *queue) { } static inline void b43legacy_pio_tx_suspend(struct b43legacy_pioqueue *queue) { } static inline void b43legacy_pio_tx_resume(struct b43legacy_pioqueue *queue) { } static inline void b43legacy_pio_freeze_txqueues(struct b43legacy_wldev *dev) { } static inline void b43legacy_pio_thaw_txqueues(struct b43legacy_wldev *dev) { } #endif /* CONFIG_B43LEGACY_PIO */ #endif /* B43legacy_PIO_H_ */ |