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158 lines
3.9 KiB
158 lines
3.9 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef B43legacy_PIO_H_ |
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#define B43legacy_PIO_H_ |
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#include "b43legacy.h" |
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#include <linux/interrupt.h> |
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#include <linux/list.h> |
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#include <linux/skbuff.h> |
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#define B43legacy_PIO_TXCTL 0x00 |
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#define B43legacy_PIO_TXDATA 0x02 |
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#define B43legacy_PIO_TXQBUFSIZE 0x04 |
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#define B43legacy_PIO_RXCTL 0x08 |
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#define B43legacy_PIO_RXDATA 0x0A |
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#define B43legacy_PIO_TXCTL_WRITELO (1 << 0) |
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#define B43legacy_PIO_TXCTL_WRITEHI (1 << 1) |
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#define B43legacy_PIO_TXCTL_COMPLETE (1 << 2) |
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#define B43legacy_PIO_TXCTL_INIT (1 << 3) |
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#define B43legacy_PIO_TXCTL_SUSPEND (1 << 7) |
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#define B43legacy_PIO_RXCTL_DATAAVAILABLE (1 << 0) |
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#define B43legacy_PIO_RXCTL_READY (1 << 1) |
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/* PIO constants */ |
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#define B43legacy_PIO_MAXTXDEVQPACKETS 31 |
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#define B43legacy_PIO_TXQADJUST 80 |
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/* PIO tuning knobs */ |
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#define B43legacy_PIO_MAXTXPACKETS 256 |
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#ifdef CONFIG_B43LEGACY_PIO |
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struct b43legacy_pioqueue; |
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struct b43legacy_xmitstatus; |
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struct b43legacy_pio_txpacket { |
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struct b43legacy_pioqueue *queue; |
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struct sk_buff *skb; |
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struct list_head list; |
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}; |
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#define pio_txpacket_getindex(packet) ((int)((packet) - \ |
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(packet)->queue->tx_packets_cache)) |
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struct b43legacy_pioqueue { |
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struct b43legacy_wldev *dev; |
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u16 mmio_base; |
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bool tx_suspended; |
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bool tx_frozen; |
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bool need_workarounds; /* Workarounds needed for core.rev < 3 */ |
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/* Adjusted size of the device internal TX buffer. */ |
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u16 tx_devq_size; |
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/* Used octets of the device internal TX buffer. */ |
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u16 tx_devq_used; |
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/* Used packet slots in the device internal TX buffer. */ |
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u8 tx_devq_packets; |
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/* Packets from the txfree list can |
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* be taken on incoming TX requests. |
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*/ |
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struct list_head txfree; |
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unsigned int nr_txfree; |
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/* Packets on the txqueue are queued, |
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* but not completely written to the chip, yet. |
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*/ |
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struct list_head txqueue; |
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/* Packets on the txrunning queue are completely |
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* posted to the device. We are waiting for the txstatus. |
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*/ |
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struct list_head txrunning; |
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struct tasklet_struct txtask; |
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struct b43legacy_pio_txpacket |
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tx_packets_cache[B43legacy_PIO_MAXTXPACKETS]; |
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}; |
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static inline |
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u16 b43legacy_pio_read(struct b43legacy_pioqueue *queue, |
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u16 offset) |
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{ |
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return b43legacy_read16(queue->dev, queue->mmio_base + offset); |
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} |
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static inline |
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void b43legacy_pio_write(struct b43legacy_pioqueue *queue, |
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u16 offset, u16 value) |
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{ |
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b43legacy_write16(queue->dev, queue->mmio_base + offset, value); |
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} |
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int b43legacy_pio_init(struct b43legacy_wldev *dev); |
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void b43legacy_pio_free(struct b43legacy_wldev *dev); |
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int b43legacy_pio_tx(struct b43legacy_wldev *dev, |
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struct sk_buff *skb); |
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void b43legacy_pio_handle_txstatus(struct b43legacy_wldev *dev, |
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const struct b43legacy_txstatus *status); |
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void b43legacy_pio_rx(struct b43legacy_pioqueue *queue); |
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/* Suspend TX queue in hardware. */ |
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void b43legacy_pio_tx_suspend(struct b43legacy_pioqueue *queue); |
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void b43legacy_pio_tx_resume(struct b43legacy_pioqueue *queue); |
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/* Suspend (freeze) the TX tasklet (software level). */ |
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void b43legacy_pio_freeze_txqueues(struct b43legacy_wldev *dev); |
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void b43legacy_pio_thaw_txqueues(struct b43legacy_wldev *dev); |
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#else /* CONFIG_B43LEGACY_PIO */ |
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static inline |
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int b43legacy_pio_init(struct b43legacy_wldev *dev) |
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{ |
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return 0; |
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} |
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static inline |
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void b43legacy_pio_free(struct b43legacy_wldev *dev) |
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{ |
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} |
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static inline |
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int b43legacy_pio_tx(struct b43legacy_wldev *dev, |
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struct sk_buff *skb) |
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{ |
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return 0; |
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} |
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static inline |
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void b43legacy_pio_handle_txstatus(struct b43legacy_wldev *dev, |
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const struct b43legacy_txstatus *status) |
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{ |
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} |
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static inline |
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void b43legacy_pio_rx(struct b43legacy_pioqueue *queue) |
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{ |
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} |
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static inline |
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void b43legacy_pio_tx_suspend(struct b43legacy_pioqueue *queue) |
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{ |
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} |
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static inline |
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void b43legacy_pio_tx_resume(struct b43legacy_pioqueue *queue) |
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{ |
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} |
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static inline |
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void b43legacy_pio_freeze_txqueues(struct b43legacy_wldev *dev) |
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{ |
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} |
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static inline |
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void b43legacy_pio_thaw_txqueues(struct b43legacy_wldev *dev) |
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{ |
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} |
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#endif /* CONFIG_B43LEGACY_PIO */ |
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#endif /* B43legacy_PIO_H_ */
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