164 lines
3.9 KiB
C
164 lines
3.9 KiB
C
#ifndef BCM43xx_PIO_H_
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#define BCM43xx_PIO_H_
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#include "bcm43xx.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 BCM43xx_PIO_TXCTL 0x00
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#define BCM43xx_PIO_TXDATA 0x02
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#define BCM43xx_PIO_TXQBUFSIZE 0x04
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#define BCM43xx_PIO_RXCTL 0x08
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#define BCM43xx_PIO_RXDATA 0x0A
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#define BCM43xx_PIO_TXCTL_WRITELO (1 << 0)
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#define BCM43xx_PIO_TXCTL_WRITEHI (1 << 1)
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#define BCM43xx_PIO_TXCTL_COMPLETE (1 << 2)
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#define BCM43xx_PIO_TXCTL_INIT (1 << 3)
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#define BCM43xx_PIO_TXCTL_SUSPEND (1 << 7)
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#define BCM43xx_PIO_RXCTL_DATAAVAILABLE (1 << 0)
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#define BCM43xx_PIO_RXCTL_READY (1 << 1)
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/* PIO constants */
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#define BCM43xx_PIO_MAXTXDEVQPACKETS 31
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#define BCM43xx_PIO_TXQADJUST 80
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/* PIO tuning knobs */
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#define BCM43xx_PIO_MAXTXPACKETS 256
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#ifdef CONFIG_BCM43XX_PIO
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struct bcm43xx_pioqueue;
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struct bcm43xx_xmitstatus;
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struct bcm43xx_pio_txpacket {
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struct bcm43xx_pioqueue *queue;
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struct ieee80211_txb *txb;
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struct list_head list;
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u8 xmitted_frags;
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u16 xmitted_octets;
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};
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#define pio_txpacket_getindex(packet) ((int)((packet) - (packet)->queue->tx_packets_cache))
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struct bcm43xx_pioqueue {
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struct bcm43xx_private *bcm;
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u16 mmio_base;
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u8 tx_suspended:1,
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tx_frozen:1,
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need_workarounds:1; /* 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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/* Total number or packets sent.
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* (This counter can obviously wrap).
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*/
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unsigned int nr_tx_packets;
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struct tasklet_struct txtask;
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struct bcm43xx_pio_txpacket tx_packets_cache[BCM43xx_PIO_MAXTXPACKETS];
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};
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static inline
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u16 bcm43xx_pio_read(struct bcm43xx_pioqueue *queue,
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u16 offset)
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{
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return bcm43xx_read16(queue->bcm, queue->mmio_base + offset);
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}
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static inline
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void bcm43xx_pio_write(struct bcm43xx_pioqueue *queue,
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u16 offset, u16 value)
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{
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bcm43xx_write16(queue->bcm, queue->mmio_base + offset, value);
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mmiowb();
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}
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int bcm43xx_pio_init(struct bcm43xx_private *bcm);
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void bcm43xx_pio_free(struct bcm43xx_private *bcm);
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int bcm43xx_pio_tx(struct bcm43xx_private *bcm,
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struct ieee80211_txb *txb);
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void bcm43xx_pio_handle_xmitstatus(struct bcm43xx_private *bcm,
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struct bcm43xx_xmitstatus *status);
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void bcm43xx_pio_rx(struct bcm43xx_pioqueue *queue);
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/* Suspend a TX queue on hardware level. */
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void bcm43xx_pio_tx_suspend(struct bcm43xx_pioqueue *queue);
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void bcm43xx_pio_tx_resume(struct bcm43xx_pioqueue *queue);
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/* Suspend (freeze) the TX tasklet (software level). */
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void bcm43xx_pio_freeze_txqueues(struct bcm43xx_private *bcm);
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void bcm43xx_pio_thaw_txqueues(struct bcm43xx_private *bcm);
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#else /* CONFIG_BCM43XX_PIO */
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static inline
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int bcm43xx_pio_init(struct bcm43xx_private *bcm)
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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 bcm43xx_pio_free(struct bcm43xx_private *bcm)
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{
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}
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static inline
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int bcm43xx_pio_tx(struct bcm43xx_private *bcm,
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struct ieee80211_txb *txb)
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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 bcm43xx_pio_handle_xmitstatus(struct bcm43xx_private *bcm,
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struct bcm43xx_xmitstatus *status)
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{
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}
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static inline
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void bcm43xx_pio_rx(struct bcm43xx_pioqueue *queue)
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{
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}
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static inline
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void bcm43xx_pio_tx_suspend(struct bcm43xx_pioqueue *queue)
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{
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}
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static inline
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void bcm43xx_pio_tx_resume(struct bcm43xx_pioqueue *queue)
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{
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}
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static inline
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void bcm43xx_pio_freeze_txqueues(struct bcm43xx_private *bcm)
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{
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}
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static inline
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void bcm43xx_pio_thaw_txqueues(struct bcm43xx_private *bcm)
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{
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}
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#endif /* CONFIG_BCM43XX_PIO */
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#endif /* BCM43xx_PIO_H_ */
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