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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef B43legacy_PIO_H_3#define B43legacy_PIO_H_4 5#include "b43legacy.h"6 7#include <linux/interrupt.h>8#include <linux/list.h>9#include <linux/skbuff.h>10 11 12#define B43legacy_PIO_TXCTL 0x0013#define B43legacy_PIO_TXDATA 0x0214#define B43legacy_PIO_TXQBUFSIZE 0x0415#define B43legacy_PIO_RXCTL 0x0816#define B43legacy_PIO_RXDATA 0x0A17 18#define B43legacy_PIO_TXCTL_WRITELO (1 << 0)19#define B43legacy_PIO_TXCTL_WRITEHI (1 << 1)20#define B43legacy_PIO_TXCTL_COMPLETE (1 << 2)21#define B43legacy_PIO_TXCTL_INIT (1 << 3)22#define B43legacy_PIO_TXCTL_SUSPEND (1 << 7)23 24#define B43legacy_PIO_RXCTL_DATAAVAILABLE (1 << 0)25#define B43legacy_PIO_RXCTL_READY (1 << 1)26 27/* PIO constants */28#define B43legacy_PIO_MAXTXDEVQPACKETS 3129#define B43legacy_PIO_TXQADJUST 8030 31/* PIO tuning knobs */32#define B43legacy_PIO_MAXTXPACKETS 25633 34 35 36#ifdef CONFIG_B43LEGACY_PIO37 38 39struct b43legacy_pioqueue;40struct b43legacy_xmitstatus;41 42struct b43legacy_pio_txpacket {43 struct b43legacy_pioqueue *queue;44 struct sk_buff *skb;45 struct list_head list;46};47 48#define pio_txpacket_getindex(packet) ((int)((packet) - \49 (packet)->queue->tx_packets_cache))50 51struct b43legacy_pioqueue {52 struct b43legacy_wldev *dev;53 u16 mmio_base;54 55 bool tx_suspended;56 bool tx_frozen;57 bool need_workarounds; /* Workarounds needed for core.rev < 3 */58 59 /* Adjusted size of the device internal TX buffer. */60 u16 tx_devq_size;61 /* Used octets of the device internal TX buffer. */62 u16 tx_devq_used;63 /* Used packet slots in the device internal TX buffer. */64 u8 tx_devq_packets;65 /* Packets from the txfree list can66 * be taken on incoming TX requests.67 */68 struct list_head txfree;69 unsigned int nr_txfree;70 /* Packets on the txqueue are queued,71 * but not completely written to the chip, yet.72 */73 struct list_head txqueue;74 /* Packets on the txrunning queue are completely75 * posted to the device. We are waiting for the txstatus.76 */77 struct list_head txrunning;78 struct tasklet_struct txtask;79 struct b43legacy_pio_txpacket80 tx_packets_cache[B43legacy_PIO_MAXTXPACKETS];81};82 83static inline84u16 b43legacy_pio_read(struct b43legacy_pioqueue *queue,85 u16 offset)86{87 return b43legacy_read16(queue->dev, queue->mmio_base + offset);88}89 90static inline91void b43legacy_pio_write(struct b43legacy_pioqueue *queue,92 u16 offset, u16 value)93{94 b43legacy_write16(queue->dev, queue->mmio_base + offset, value);95}96 97 98int b43legacy_pio_init(struct b43legacy_wldev *dev);99void b43legacy_pio_free(struct b43legacy_wldev *dev);100 101int b43legacy_pio_tx(struct b43legacy_wldev *dev,102 struct sk_buff *skb);103void b43legacy_pio_handle_txstatus(struct b43legacy_wldev *dev,104 const struct b43legacy_txstatus *status);105void b43legacy_pio_rx(struct b43legacy_pioqueue *queue);106 107/* Suspend TX queue in hardware. */108void b43legacy_pio_tx_suspend(struct b43legacy_pioqueue *queue);109void b43legacy_pio_tx_resume(struct b43legacy_pioqueue *queue);110/* Suspend (freeze) the TX tasklet (software level). */111void b43legacy_pio_freeze_txqueues(struct b43legacy_wldev *dev);112void b43legacy_pio_thaw_txqueues(struct b43legacy_wldev *dev);113 114#else /* CONFIG_B43LEGACY_PIO */115 116static inline117int b43legacy_pio_init(struct b43legacy_wldev *dev)118{119 return 0;120}121static inline122void b43legacy_pio_free(struct b43legacy_wldev *dev)123{124}125static inline126int b43legacy_pio_tx(struct b43legacy_wldev *dev,127 struct sk_buff *skb)128{129 return 0;130}131static inline132void b43legacy_pio_handle_txstatus(struct b43legacy_wldev *dev,133 const struct b43legacy_txstatus *status)134{135}136static inline137void b43legacy_pio_rx(struct b43legacy_pioqueue *queue)138{139}140static inline141void b43legacy_pio_tx_suspend(struct b43legacy_pioqueue *queue)142{143}144static inline145void b43legacy_pio_tx_resume(struct b43legacy_pioqueue *queue)146{147}148static inline149void b43legacy_pio_freeze_txqueues(struct b43legacy_wldev *dev)150{151}152static inline153void b43legacy_pio_thaw_txqueues(struct b43legacy_wldev *dev)154{155}156 157#endif /* CONFIG_B43LEGACY_PIO */158#endif /* B43legacy_PIO_H_ */159