1 files changed, 220 insertions, 0 deletions

diff --git a/drivers/net/wireless/b43/pio.h b/drivers/net/wireless/b43/pio.h
new file mode 100644
index 000000000000..e2ec676cc9e4
--- /dev/null
+++ b/drivers/net/wireless/b43/pio.h
@@ -0,0 +1,220 @@
+#ifndef B43_PIO_H_
+#define B43_PIO_H_
+
+#include "b43.h"
+
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/list.h>
+#include <linux/skbuff.h>
+
+
+/*** Registers for PIO queues up to revision 7. ***/
+/* TX queue. */
+#define B43_PIO_TXCTL                   0x00
+#define  B43_PIO_TXCTL_WRITELO          0x0001
+#define  B43_PIO_TXCTL_WRITEHI          0x0002
+#define  B43_PIO_TXCTL_EOF              0x0004
+#define  B43_PIO_TXCTL_FREADY           0x0008
+#define  B43_PIO_TXCTL_FLUSHREQ         0x0020
+#define  B43_PIO_TXCTL_FLUSHPEND        0x0040
+#define  B43_PIO_TXCTL_SUSPREQ          0x0080
+#define  B43_PIO_TXCTL_QSUSP            0x0100
+#define  B43_PIO_TXCTL_COMMCNT          0xFC00
+#define  B43_PIO_TXCTL_COMMCNT_SHIFT    10
+#define B43_PIO_TXDATA                  0x02
+#define B43_PIO_TXQBUFSIZE              0x04
+/* RX queue. */
+#define B43_PIO_RXCTL                   0x00
+#define  B43_PIO_RXCTL_FRAMERDY         0x0001
+#define  B43_PIO_RXCTL_DATARDY          0x0002
+#define B43_PIO_RXDATA                  0x02
+
+/*** Registers for PIO queues revision 8 and later. ***/
+/* TX queue */
+#define B43_PIO8_TXCTL                  0x00
+#define  B43_PIO8_TXCTL_0_7             0x00000001
+#define  B43_PIO8_TXCTL_8_15            0x00000002
+#define  B43_PIO8_TXCTL_16_23           0x00000004
+#define  B43_PIO8_TXCTL_24_31           0x00000008
+#define  B43_PIO8_TXCTL_EOF             0x00000010
+#define  B43_PIO8_TXCTL_FREADY          0x00000080
+#define  B43_PIO8_TXCTL_SUSPREQ         0x00000100
+#define  B43_PIO8_TXCTL_QSUSP           0x00000200
+#define  B43_PIO8_TXCTL_FLUSHREQ        0x00000400
+#define  B43_PIO8_TXCTL_FLUSHPEND       0x00000800
+#define B43_PIO8_TXDATA                 0x04
+/* RX queue */
+#define B43_PIO8_RXCTL                  0x00
+#define  B43_PIO8_RXCTL_FRAMERDY        0x00000001
+#define  B43_PIO8_RXCTL_DATARDY         0x00000002
+#define B43_PIO8_RXDATA                 0x04
+
+
+/* The maximum number of TX-packets the HW can handle. */
+#define B43_PIO_MAX_NR_TXPACKETS        32
+
+
+#ifdef CONFIG_B43_PIO
+
+struct b43_pio_txpacket {
+        /* Pointer to the TX queue we belong to. */
+        struct b43_pio_txqueue *queue;
+        /* The TX data packet. */
+        struct sk_buff *skb;
+        /* The status meta data. */
+        struct ieee80211_tx_status txstat;
+        /* Index in the (struct b43_pio_txqueue)->packets array. */
+        u8 index;
+
+        struct list_head list;
+};
+
+struct b43_pio_txqueue {
+        struct b43_wldev *dev;
+        spinlock_t lock;
+        u16 mmio_base;
+
+        /* The device queue buffer size in bytes. */
+        u16 buffer_size;
+        /* The number of used bytes in the device queue buffer. */
+        u16 buffer_used;
+        /* The number of packets that can still get queued.
+         * This is decremented on queueing a packet and incremented
+         * after receiving the transmit status. */
+        u16 free_packet_slots;
+
+        /* True, if the mac80211 queue was stopped due to overflow at TX. */
+        bool stopped;
+        /* Our b43 queue index number */
+        u8 index;
+        /* The mac80211 QoS queue priority. */
+        u8 queue_prio;
+
+        /* Buffer for TX packet meta data. */
+        struct b43_pio_txpacket packets[B43_PIO_MAX_NR_TXPACKETS];
+        struct list_head packets_list;
+
+        /* Total number of transmitted packets. */
+        unsigned int nr_tx_packets;
+
+        /* Shortcut to the 802.11 core revision. This is to
+         * avoid horrible pointer dereferencing in the fastpaths. */
+        u8 rev;
+};
+
+struct b43_pio_rxqueue {
+        struct b43_wldev *dev;
+        spinlock_t lock;
+        u16 mmio_base;
+
+        /* Work to reduce latency issues on RX. */
+        struct work_struct rx_work;
+
+        /* Shortcut to the 802.11 core revision. This is to
+         * avoid horrible pointer dereferencing in the fastpaths. */
+        u8 rev;
+};
+
+
+static inline u16 b43_piotx_read16(struct b43_pio_txqueue *q, u16 offset)
+{
+        return b43_read16(q->dev, q->mmio_base + offset);
+}
+
+static inline u32 b43_piotx_read32(struct b43_pio_txqueue *q, u16 offset)
+{
+        return b43_read32(q->dev, q->mmio_base + offset);
+}
+
+static inline void b43_piotx_write16(struct b43_pio_txqueue *q,
+                                     u16 offset, u16 value)
+{
+        b43_write16(q->dev, q->mmio_base + offset, value);
+}
+
+static inline void b43_piotx_write32(struct b43_pio_txqueue *q,
+                                     u16 offset, u32 value)
+{
+        b43_write32(q->dev, q->mmio_base + offset, value);
+}
+
+
+static inline u16 b43_piorx_read16(struct b43_pio_rxqueue *q, u16 offset)
+{
+        return b43_read16(q->dev, q->mmio_base + offset);
+}
+
+static inline u32 b43_piorx_read32(struct b43_pio_rxqueue *q, u16 offset)
+{
+        return b43_read32(q->dev, q->mmio_base + offset);
+}
+
+static inline void b43_piorx_write16(struct b43_pio_rxqueue *q,
+                                     u16 offset, u16 value)
+{
+        b43_write16(q->dev, q->mmio_base + offset, value);
+}
+
+static inline void b43_piorx_write32(struct b43_pio_rxqueue *q,
+                                     u16 offset, u32 value)
+{
+        b43_write32(q->dev, q->mmio_base + offset, value);
+}
+
+
+int b43_pio_init(struct b43_wldev *dev);
+void b43_pio_stop(struct b43_wldev *dev);
+void b43_pio_free(struct b43_wldev *dev);
+
+int b43_pio_tx(struct b43_wldev *dev,
+               struct sk_buff *skb, struct ieee80211_tx_control *ctl);
+void b43_pio_handle_txstatus(struct b43_wldev *dev,
+                             const struct b43_txstatus *status);
+void b43_pio_get_tx_stats(struct b43_wldev *dev,
+                          struct ieee80211_tx_queue_stats *stats);
+void b43_pio_rx(struct b43_pio_rxqueue *q);
+
+void b43_pio_tx_suspend(struct b43_wldev *dev);
+void b43_pio_tx_resume(struct b43_wldev *dev);
+
+
+#else /* CONFIG_B43_PIO */
+
+
+static inline int b43_pio_init(struct b43_wldev *dev)
+{
+        return 0;
+}
+static inline void b43_pio_free(struct b43_wldev *dev)
+{
+}
+static inline void b43_pio_stop(struct b43_wldev *dev)
+{
+}
+static inline int b43_pio_tx(struct b43_wldev *dev,
+                             struct sk_buff *skb,
+                             struct ieee80211_tx_control *ctl)
+{
+        return 0;
+}
+static inline void b43_pio_handle_txstatus(struct b43_wldev *dev,
+                                           const struct b43_txstatus *status)
+{
+}
+static inline void b43_pio_get_tx_stats(struct b43_wldev *dev,
+                                        struct ieee80211_tx_queue_stats *stats)
+{
+}
+static inline void b43_pio_rx(struct b43_pio_rxqueue *q)
+{
+}
+static inline void b43_pio_tx_suspend(struct b43_wldev *dev)
+{
+}
+static inline void b43_pio_tx_resume(struct b43_wldev *dev)
+{
+}
+
+#endif /* CONFIG_B43_PIO */
+#endif /* B43_PIO_H_ */