160 lines
3.9 KiB
C
160 lines
3.9 KiB
C
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/* 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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mmiowb();
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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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