Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux

1 files changed, 305 insertions, 0 deletions

diff --git a/drivers/net/wireless/broadcom/b43/dma.h b/drivers/net/wireless/broadcom/b43/dma.h
new file mode 100644
index 000000000000..df8c8cdcbdb5
--- /dev/null
+++ b/drivers/net/wireless/broadcom/b43/dma.h
@@ -0,0 +1,305 @@
+#ifndef B43_DMA_H_
+#define B43_DMA_H_
+
+#include <linux/err.h>
+
+#include "b43.h"
+
+
+/* DMA-Interrupt reasons. */
+#define B43_DMAIRQ_FATALMASK	((1 << 10) | (1 << 11) | (1 << 12) \
+					 | (1 << 14) | (1 << 15))
+#define B43_DMAIRQ_RDESC_UFLOW		(1 << 13)
+#define B43_DMAIRQ_RX_DONE		(1 << 16)
+
+/*** 32-bit DMA Engine. ***/
+
+/* 32-bit DMA controller registers. */
+#define B43_DMA32_TXCTL				0x00
+#define		B43_DMA32_TXENABLE			0x00000001
+#define		B43_DMA32_TXSUSPEND			0x00000002
+#define		B43_DMA32_TXLOOPBACK		0x00000004
+#define		B43_DMA32_TXFLUSH			0x00000010
+#define		B43_DMA32_TXPARITYDISABLE		0x00000800
+#define		B43_DMA32_TXADDREXT_MASK		0x00030000
+#define		B43_DMA32_TXADDREXT_SHIFT		16
+#define B43_DMA32_TXRING				0x04
+#define B43_DMA32_TXINDEX				0x08
+#define B43_DMA32_TXSTATUS				0x0C
+#define		B43_DMA32_TXDPTR			0x00000FFF
+#define		B43_DMA32_TXSTATE			0x0000F000
+#define			B43_DMA32_TXSTAT_DISABLED	0x00000000
+#define			B43_DMA32_TXSTAT_ACTIVE	0x00001000
+#define			B43_DMA32_TXSTAT_IDLEWAIT	0x00002000
+#define			B43_DMA32_TXSTAT_STOPPED	0x00003000
+#define			B43_DMA32_TXSTAT_SUSP	0x00004000
+#define		B43_DMA32_TXERROR			0x000F0000
+#define			B43_DMA32_TXERR_NOERR	0x00000000
+#define			B43_DMA32_TXERR_PROT	0x00010000
+#define			B43_DMA32_TXERR_UNDERRUN	0x00020000
+#define			B43_DMA32_TXERR_BUFREAD	0x00030000
+#define			B43_DMA32_TXERR_DESCREAD	0x00040000
+#define		B43_DMA32_TXACTIVE			0xFFF00000
+#define B43_DMA32_RXCTL				0x10
+#define		B43_DMA32_RXENABLE			0x00000001
+#define		B43_DMA32_RXFROFF_MASK		0x000000FE
+#define		B43_DMA32_RXFROFF_SHIFT		1
+#define		B43_DMA32_RXDIRECTFIFO		0x00000100
+#define		B43_DMA32_RXPARITYDISABLE		0x00000800
+#define		B43_DMA32_RXADDREXT_MASK		0x00030000
+#define		B43_DMA32_RXADDREXT_SHIFT		16
+#define B43_DMA32_RXRING				0x14
+#define B43_DMA32_RXINDEX				0x18
+#define B43_DMA32_RXSTATUS				0x1C
+#define		B43_DMA32_RXDPTR			0x00000FFF
+#define		B43_DMA32_RXSTATE			0x0000F000
+#define			B43_DMA32_RXSTAT_DISABLED	0x00000000
+#define			B43_DMA32_RXSTAT_ACTIVE	0x00001000
+#define			B43_DMA32_RXSTAT_IDLEWAIT	0x00002000
+#define			B43_DMA32_RXSTAT_STOPPED	0x00003000
+#define		B43_DMA32_RXERROR			0x000F0000
+#define			B43_DMA32_RXERR_NOERR	0x00000000
+#define			B43_DMA32_RXERR_PROT	0x00010000
+#define			B43_DMA32_RXERR_OVERFLOW	0x00020000
+#define			B43_DMA32_RXERR_BUFWRITE	0x00030000
+#define			B43_DMA32_RXERR_DESCREAD	0x00040000
+#define		B43_DMA32_RXACTIVE			0xFFF00000
+
+/* 32-bit DMA descriptor. */
+struct b43_dmadesc32 {
+	__le32 control;
+	__le32 address;
+} __packed;
+#define B43_DMA32_DCTL_BYTECNT		0x00001FFF
+#define B43_DMA32_DCTL_ADDREXT_MASK		0x00030000
+#define B43_DMA32_DCTL_ADDREXT_SHIFT	16
+#define B43_DMA32_DCTL_DTABLEEND		0x10000000
+#define B43_DMA32_DCTL_IRQ			0x20000000
+#define B43_DMA32_DCTL_FRAMEEND		0x40000000
+#define B43_DMA32_DCTL_FRAMESTART		0x80000000
+
+/*** 64-bit DMA Engine. ***/
+
+/* 64-bit DMA controller registers. */
+#define B43_DMA64_TXCTL				0x00
+#define		B43_DMA64_TXENABLE			0x00000001
+#define		B43_DMA64_TXSUSPEND			0x00000002
+#define		B43_DMA64_TXLOOPBACK		0x00000004
+#define		B43_DMA64_TXFLUSH			0x00000010
+#define		B43_DMA64_TXPARITYDISABLE		0x00000800
+#define		B43_DMA64_TXADDREXT_MASK		0x00030000
+#define		B43_DMA64_TXADDREXT_SHIFT		16
+#define B43_DMA64_TXINDEX				0x04
+#define B43_DMA64_TXRINGLO				0x08
+#define B43_DMA64_TXRINGHI				0x0C
+#define B43_DMA64_TXSTATUS				0x10
+#define		B43_DMA64_TXSTATDPTR		0x00001FFF
+#define		B43_DMA64_TXSTAT			0xF0000000
+#define			B43_DMA64_TXSTAT_DISABLED	0x00000000
+#define			B43_DMA64_TXSTAT_ACTIVE	0x10000000
+#define			B43_DMA64_TXSTAT_IDLEWAIT	0x20000000
+#define			B43_DMA64_TXSTAT_STOPPED	0x30000000
+#define			B43_DMA64_TXSTAT_SUSP	0x40000000
+#define B43_DMA64_TXERROR				0x14
+#define		B43_DMA64_TXERRDPTR			0x0001FFFF
+#define		B43_DMA64_TXERR			0xF0000000
+#define			B43_DMA64_TXERR_NOERR	0x00000000
+#define			B43_DMA64_TXERR_PROT	0x10000000
+#define			B43_DMA64_TXERR_UNDERRUN	0x20000000
+#define			B43_DMA64_TXERR_TRANSFER	0x30000000
+#define			B43_DMA64_TXERR_DESCREAD	0x40000000
+#define			B43_DMA64_TXERR_CORE	0x50000000
+#define B43_DMA64_RXCTL				0x20
+#define		B43_DMA64_RXENABLE			0x00000001
+#define		B43_DMA64_RXFROFF_MASK		0x000000FE
+#define		B43_DMA64_RXFROFF_SHIFT		1
+#define		B43_DMA64_RXDIRECTFIFO		0x00000100
+#define		B43_DMA64_RXPARITYDISABLE		0x00000800
+#define		B43_DMA64_RXADDREXT_MASK		0x00030000
+#define		B43_DMA64_RXADDREXT_SHIFT		16
+#define B43_DMA64_RXINDEX				0x24
+#define B43_DMA64_RXRINGLO				0x28
+#define B43_DMA64_RXRINGHI				0x2C
+#define B43_DMA64_RXSTATUS				0x30
+#define		B43_DMA64_RXSTATDPTR		0x00001FFF
+#define		B43_DMA64_RXSTAT			0xF0000000
+#define			B43_DMA64_RXSTAT_DISABLED	0x00000000
+#define			B43_DMA64_RXSTAT_ACTIVE	0x10000000
+#define			B43_DMA64_RXSTAT_IDLEWAIT	0x20000000
+#define			B43_DMA64_RXSTAT_STOPPED	0x30000000
+#define			B43_DMA64_RXSTAT_SUSP	0x40000000
+#define B43_DMA64_RXERROR				0x34
+#define		B43_DMA64_RXERRDPTR			0x0001FFFF
+#define		B43_DMA64_RXERR			0xF0000000
+#define			B43_DMA64_RXERR_NOERR	0x00000000
+#define			B43_DMA64_RXERR_PROT	0x10000000
+#define			B43_DMA64_RXERR_UNDERRUN	0x20000000
+#define			B43_DMA64_RXERR_TRANSFER	0x30000000
+#define			B43_DMA64_RXERR_DESCREAD	0x40000000
+#define			B43_DMA64_RXERR_CORE	0x50000000
+
+/* 64-bit DMA descriptor. */
+struct b43_dmadesc64 {
+	__le32 control0;
+	__le32 control1;
+	__le32 address_low;
+	__le32 address_high;
+} __packed;
+#define B43_DMA64_DCTL0_DTABLEEND		0x10000000
+#define B43_DMA64_DCTL0_IRQ			0x20000000
+#define B43_DMA64_DCTL0_FRAMEEND		0x40000000
+#define B43_DMA64_DCTL0_FRAMESTART		0x80000000
+#define B43_DMA64_DCTL1_BYTECNT		0x00001FFF
+#define B43_DMA64_DCTL1_ADDREXT_MASK	0x00030000
+#define B43_DMA64_DCTL1_ADDREXT_SHIFT	16
+
+struct b43_dmadesc_generic {
+	union {
+		struct b43_dmadesc32 dma32;
+		struct b43_dmadesc64 dma64;
+	} __packed;
+} __packed;
+
+/* Misc DMA constants */
+#define B43_DMA32_RINGMEMSIZE		4096
+#define B43_DMA64_RINGMEMSIZE		8192
+/* Offset of frame with actual data */
+#define B43_DMA0_RX_FW598_FO		38
+#define B43_DMA0_RX_FW351_FO		30
+
+/* DMA engine tuning knobs */
+#define B43_TXRING_SLOTS		256
+#define B43_RXRING_SLOTS		256
+#define B43_DMA0_RX_FW598_BUFSIZE	(B43_DMA0_RX_FW598_FO + IEEE80211_MAX_FRAME_LEN)
+#define B43_DMA0_RX_FW351_BUFSIZE	(B43_DMA0_RX_FW351_FO + IEEE80211_MAX_FRAME_LEN)
+
+/* Pointer poison */
+#define B43_DMA_PTR_POISON		((void *)ERR_PTR(-ENOMEM))
+#define b43_dma_ptr_is_poisoned(ptr)	(unlikely((ptr) == B43_DMA_PTR_POISON))
+
+
+struct sk_buff;
+struct b43_private;
+struct b43_txstatus;
+
+struct b43_dmadesc_meta {
+	/* The kernel DMA-able buffer. */
+	struct sk_buff *skb;
+	/* DMA base bus-address of the descriptor buffer. */
+	dma_addr_t dmaaddr;
+	/* ieee80211 TX status. Only used once per 802.11 frag. */
+	bool is_last_fragment;
+};
+
+struct b43_dmaring;
+
+/* Lowlevel DMA operations that differ between 32bit and 64bit DMA. */
+struct b43_dma_ops {
+	struct b43_dmadesc_generic *(*idx2desc) (struct b43_dmaring * ring,
+						 int slot,
+						 struct b43_dmadesc_meta **
+						 meta);
+	void (*fill_descriptor) (struct b43_dmaring * ring,
+				 struct b43_dmadesc_generic * desc,
+				 dma_addr_t dmaaddr, u16 bufsize, int start,
+				 int end, int irq);
+	void (*poke_tx) (struct b43_dmaring * ring, int slot);
+	void (*tx_suspend) (struct b43_dmaring * ring);
+	void (*tx_resume) (struct b43_dmaring * ring);
+	int (*get_current_rxslot) (struct b43_dmaring * ring);
+	void (*set_current_rxslot) (struct b43_dmaring * ring, int slot);
+};
+
+enum b43_dmatype {
+	B43_DMA_30BIT	= 30,
+	B43_DMA_32BIT	= 32,
+	B43_DMA_64BIT	= 64,
+};
+
+enum b43_addrtype {
+	B43_DMA_ADDR_LOW,
+	B43_DMA_ADDR_HIGH,
+	B43_DMA_ADDR_EXT,
+};
+
+struct b43_dmaring {
+	/* Lowlevel DMA ops. */
+	const struct b43_dma_ops *ops;
+	/* Kernel virtual base address of the ring memory. */
+	void *descbase;
+	/* Meta data about all descriptors. */
+	struct b43_dmadesc_meta *meta;
+	/* Cache of TX headers for each TX frame.
+	 * This is to avoid an allocation on each TX.
+	 * This is NULL for an RX ring.
+	 */
+	u8 *txhdr_cache;
+	/* (Unadjusted) DMA base bus-address of the ring memory. */
+	dma_addr_t dmabase;
+	/* Number of descriptor slots in the ring. */
+	int nr_slots;
+	/* Number of used descriptor slots. */
+	int used_slots;
+	/* Currently used slot in the ring. */
+	int current_slot;
+	/* Frameoffset in octets. */
+	u32 frameoffset;
+	/* Descriptor buffer size. */
+	u16 rx_buffersize;
+	/* The MMIO base register of the DMA controller. */
+	u16 mmio_base;
+	/* DMA controller index number (0-5). */
+	int index;
+	/* Boolean. Is this a TX ring? */
+	bool tx;
+	/* The type of DMA engine used. */
+	enum b43_dmatype type;
+	/* Boolean. Is this ring stopped at ieee80211 level? */
+	bool stopped;
+	/* The QOS priority assigned to this ring. Only used for TX rings.
+	 * This is the mac80211 "queue" value. */
+	u8 queue_prio;
+	struct b43_wldev *dev;
+#ifdef CONFIG_B43_DEBUG
+	/* Maximum number of used slots. */
+	int max_used_slots;
+	/* Last time we injected a ring overflow. */
+	unsigned long last_injected_overflow;
+	/* Statistics: Number of successfully transmitted packets */
+	u64 nr_succeed_tx_packets;
+	/* Statistics: Number of failed TX packets */
+	u64 nr_failed_tx_packets;
+	/* Statistics: Total number of TX plus all retries. */
+	u64 nr_total_packet_tries;
+#endif /* CONFIG_B43_DEBUG */
+};
+
+static inline u32 b43_dma_read(struct b43_dmaring *ring, u16 offset)
+{
+	return b43_read32(ring->dev, ring->mmio_base + offset);
+}
+
+static inline void b43_dma_write(struct b43_dmaring *ring, u16 offset, u32 value)
+{
+	b43_write32(ring->dev, ring->mmio_base + offset, value);
+}
+
+int b43_dma_init(struct b43_wldev *dev);
+void b43_dma_free(struct b43_wldev *dev);
+
+void b43_dma_tx_suspend(struct b43_wldev *dev);
+void b43_dma_tx_resume(struct b43_wldev *dev);
+
+int b43_dma_tx(struct b43_wldev *dev,
+	       struct sk_buff *skb);
+void b43_dma_handle_txstatus(struct b43_wldev *dev,
+			     const struct b43_txstatus *status);
+
+void b43_dma_handle_rx_overflow(struct b43_dmaring *ring);
+
+void b43_dma_rx(struct b43_dmaring *ring);
+
+void b43_dma_direct_fifo_rx(struct b43_wldev *dev,
+			    unsigned int engine_index, bool enable);
+
+#endif /* B43_DMA_H_ */