[net-next-2.6.git] / drivers / net / wireless / b43legacy / pio.h

#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);
	mmiowb();
}


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_ */
Commit	Line	Data
75388acd LF	1	#ifndef B43legacy_PIO_H_
	2	#define B43legacy_PIO_H_
	3
	4	#include "b43legacy.h"
	5
	6	#include <linux/interrupt.h>
	7	#include <linux/list.h>
	8	#include <linux/skbuff.h>
	9
	10
	11	#define B43legacy_PIO_TXCTL 0x00
	12	#define B43legacy_PIO_TXDATA 0x02
	13	#define B43legacy_PIO_TXQBUFSIZE 0x04
	14	#define B43legacy_PIO_RXCTL 0x08
	15	#define B43legacy_PIO_RXDATA 0x0A
	16
	17	#define B43legacy_PIO_TXCTL_WRITELO (1 << 0)
	18	#define B43legacy_PIO_TXCTL_WRITEHI (1 << 1)
	19	#define B43legacy_PIO_TXCTL_COMPLETE (1 << 2)
	20	#define B43legacy_PIO_TXCTL_INIT (1 << 3)
	21	#define B43legacy_PIO_TXCTL_SUSPEND (1 << 7)
	22
	23	#define B43legacy_PIO_RXCTL_DATAAVAILABLE (1 << 0)
	24	#define B43legacy_PIO_RXCTL_READY (1 << 1)
	25
	26	/* PIO constants */
	27	#define B43legacy_PIO_MAXTXDEVQPACKETS 31
	28	#define B43legacy_PIO_TXQADJUST 80
	29
	30	/* PIO tuning knobs */
	31	#define B43legacy_PIO_MAXTXPACKETS 256
	32
	33
	34
	35	#ifdef CONFIG_B43LEGACY_PIO
	36
	37
	38	struct b43legacy_pioqueue;
	39	struct b43legacy_xmitstatus;
	40
	41	struct b43legacy_pio_txpacket {
	42	struct b43legacy_pioqueue *queue;
	43	struct sk_buff *skb;
75388acd LF	44	struct list_head list;
	45	};
	46
	47	#define pio_txpacket_getindex(packet) ((int)((packet) - \
	48	(packet)->queue->tx_packets_cache))
	49
	50	struct b43legacy_pioqueue {
	51	struct b43legacy_wldev *dev;
	52	u16 mmio_base;
	53
	54	bool tx_suspended;
	55	bool tx_frozen;
	56	bool need_workarounds; /* Workarounds needed for core.rev < 3 */
	57
	58	/* Adjusted size of the device internal TX buffer. */
	59	u16 tx_devq_size;
	60	/* Used octets of the device internal TX buffer. */
	61	u16 tx_devq_used;
	62	/* Used packet slots in the device internal TX buffer. */
	63	u8 tx_devq_packets;
	64	/* Packets from the txfree list can
	65	* be taken on incoming TX requests.
	66	*/
	67	struct list_head txfree;
	68	unsigned int nr_txfree;
	69	/* Packets on the txqueue are queued,
	70	* but not completely written to the chip, yet.
	71	*/
	72	struct list_head txqueue;
	73	/* Packets on the txrunning queue are completely
	74	* posted to the device. We are waiting for the txstatus.
	75	*/
	76	struct list_head txrunning;
75388acd LF	77	struct tasklet_struct txtask;
	78	struct b43legacy_pio_txpacket
	79	tx_packets_cache[B43legacy_PIO_MAXTXPACKETS];
	80	};
	81
	82	static inline
	83	u16 b43legacy_pio_read(struct b43legacy_pioqueue *queue,
	84	u16 offset)
	85	{
	86	return b43legacy_read16(queue->dev, queue->mmio_base + offset);
	87	}
	88
	89	static inline
	90	void b43legacy_pio_write(struct b43legacy_pioqueue *queue,
	91	u16 offset, u16 value)
	92	{
	93	b43legacy_write16(queue->dev, queue->mmio_base + offset, value);
	94	mmiowb();
	95	}
	96
	97
	98	int b43legacy_pio_init(struct b43legacy_wldev *dev);
	99	void b43legacy_pio_free(struct b43legacy_wldev *dev);
	100
	101	int b43legacy_pio_tx(struct b43legacy_wldev *dev,
e039fa4a	102	struct sk_buff *skb);
75388acd LF	103	void b43legacy_pio_handle_txstatus(struct b43legacy_wldev *dev,
75388acd LF	104	const struct b43legacy_txstatus *status);
75388acd LF	105	void b43legacy_pio_rx(struct b43legacy_pioqueue *queue);
	106
	107	/* Suspend TX queue in hardware. */
	108	void b43legacy_pio_tx_suspend(struct b43legacy_pioqueue *queue);
	109	void b43legacy_pio_tx_resume(struct b43legacy_pioqueue *queue);
	110	/* Suspend (freeze) the TX tasklet (software level). */
	111	void b43legacy_pio_freeze_txqueues(struct b43legacy_wldev *dev);
	112	void b43legacy_pio_thaw_txqueues(struct b43legacy_wldev *dev);
	113
	114	#else /* CONFIG_B43LEGACY_PIO */
	115
	116	static inline
	117	int b43legacy_pio_init(struct b43legacy_wldev *dev)
	118	{
	119	return 0;
	120	}
	121	static inline
	122	void b43legacy_pio_free(struct b43legacy_wldev *dev)
	123	{
	124	}
	125	static inline
	126	int b43legacy_pio_tx(struct b43legacy_wldev *dev,
553381c4	127	struct sk_buff *skb)
75388acd LF	128	{
	129	return 0;
	130	}
	131	static inline
	132	void b43legacy_pio_handle_txstatus(struct b43legacy_wldev *dev,
	133	const struct b43legacy_txstatus *status)
	134	{
	135	}
	136	static inline
75388acd LF	137	void b43legacy_pio_rx(struct b43legacy_pioqueue *queue)
	138	{
	139	}
	140	static inline
	141	void b43legacy_pio_tx_suspend(struct b43legacy_pioqueue *queue)
	142	{
	143	}
	144	static inline
	145	void b43legacy_pio_tx_resume(struct b43legacy_pioqueue *queue)
	146	{
	147	}
	148	static inline
	149	void b43legacy_pio_freeze_txqueues(struct b43legacy_wldev *dev)
	150	{
	151	}
	152	static inline
	153	void b43legacy_pio_thaw_txqueues(struct b43legacy_wldev *dev)
	154	{
	155	}
	156
	157	#endif /* CONFIG_B43LEGACY_PIO */
	158	#endif /* B43legacy_PIO_H_ */