cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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pio.h (4003B)

      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		0x00
     13#define B43legacy_PIO_TXDATA		0x02
     14#define B43legacy_PIO_TXQBUFSIZE	0x04
     15#define B43legacy_PIO_RXCTL		0x08
     16#define B43legacy_PIO_RXDATA		0x0A
     17
     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	31
     29#define B43legacy_PIO_TXQADJUST		80
     30
     31/* PIO tuning knobs */
     32#define B43legacy_PIO_MAXTXPACKETS	256
     33
     34
     35
     36#ifdef CONFIG_B43LEGACY_PIO
     37
     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 can
     66	 * 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 completely
     75	 * 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_txpacket
     80			 tx_packets_cache[B43legacy_PIO_MAXTXPACKETS];
     81};
     82
     83static inline
     84u16 b43legacy_pio_read(struct b43legacy_pioqueue *queue,
     85		     u16 offset)
     86{
     87	return b43legacy_read16(queue->dev, queue->mmio_base + offset);
     88}
     89
     90static inline
     91void 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 inline
    117int b43legacy_pio_init(struct b43legacy_wldev *dev)
    118{
    119	return 0;
    120}
    121static inline
    122void b43legacy_pio_free(struct b43legacy_wldev *dev)
    123{
    124}
    125static inline
    126int b43legacy_pio_tx(struct b43legacy_wldev *dev,
    127		   struct sk_buff *skb)
    128{
    129	return 0;
    130}
    131static inline
    132void b43legacy_pio_handle_txstatus(struct b43legacy_wldev *dev,
    133				 const struct b43legacy_txstatus *status)
    134{
    135}
    136static inline
    137void b43legacy_pio_rx(struct b43legacy_pioqueue *queue)
    138{
    139}
    140static inline
    141void b43legacy_pio_tx_suspend(struct b43legacy_pioqueue *queue)
    142{
    143}
    144static inline
    145void b43legacy_pio_tx_resume(struct b43legacy_pioqueue *queue)
    146{
    147}
    148static inline
    149void b43legacy_pio_freeze_txqueues(struct b43legacy_wldev *dev)
    150{
    151}
    152static inline
    153void b43legacy_pio_thaw_txqueues(struct b43legacy_wldev *dev)
    154{
    155}
    156
    157#endif /* CONFIG_B43LEGACY_PIO */
    158#endif /* B43legacy_PIO_H_ */