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Release 4.11 drivers/net/wireless/broadcom/b43legacy/dma.h

#ifndef B43legacy_DMA_H_

#define B43legacy_DMA_H_

#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/linkage.h>
#include <linux/atomic.h>

#include "b43legacy.h"


/* DMA-Interrupt reasons. */

#define B43legacy_DMAIRQ_FATALMASK	((1 << 10) | (1 << 11) | (1 << 12) \
                                         | (1 << 14) | (1 << 15))

#define B43legacy_DMAIRQ_NONFATALMASK	(1 << 13)

#define B43legacy_DMAIRQ_RX_DONE		(1 << 16)


/*** 32-bit DMA Engine. ***/

/* 32-bit DMA controller registers. */

#define B43legacy_DMA32_TXCTL				0x00

#define		B43legacy_DMA32_TXENABLE		0x00000001

#define		B43legacy_DMA32_TXSUSPEND		0x00000002

#define		B43legacy_DMA32_TXLOOPBACK		0x00000004

#define		B43legacy_DMA32_TXFLUSH			0x00000010

#define		B43legacy_DMA32_TXADDREXT_MASK		0x00030000

#define		B43legacy_DMA32_TXADDREXT_SHIFT		16

#define B43legacy_DMA32_TXRING				0x04

#define B43legacy_DMA32_TXINDEX				0x08

#define B43legacy_DMA32_TXSTATUS			0x0C

#define		B43legacy_DMA32_TXDPTR			0x00000FFF

#define		B43legacy_DMA32_TXSTATE			0x0000F000

#define			B43legacy_DMA32_TXSTAT_DISABLED	0x00000000

#define			B43legacy_DMA32_TXSTAT_ACTIVE	0x00001000

#define			B43legacy_DMA32_TXSTAT_IDLEWAIT	0x00002000

#define			B43legacy_DMA32_TXSTAT_STOPPED	0x00003000

#define			B43legacy_DMA32_TXSTAT_SUSP	0x00004000

#define		B43legacy_DMA32_TXERROR			0x000F0000

#define			B43legacy_DMA32_TXERR_NOERR	0x00000000

#define			B43legacy_DMA32_TXERR_PROT	0x00010000

#define			B43legacy_DMA32_TXERR_UNDERRUN	0x00020000

#define			B43legacy_DMA32_TXERR_BUFREAD	0x00030000

#define			B43legacy_DMA32_TXERR_DESCREAD	0x00040000

#define		B43legacy_DMA32_TXACTIVE		0xFFF00000

#define B43legacy_DMA32_RXCTL				0x10

#define		B43legacy_DMA32_RXENABLE		0x00000001

#define		B43legacy_DMA32_RXFROFF_MASK		0x000000FE

#define		B43legacy_DMA32_RXFROFF_SHIFT		1

#define		B43legacy_DMA32_RXDIRECTFIFO		0x00000100

#define		B43legacy_DMA32_RXADDREXT_MASK		0x00030000

#define		B43legacy_DMA32_RXADDREXT_SHIFT		16

#define B43legacy_DMA32_RXRING				0x14

#define B43legacy_DMA32_RXINDEX				0x18

#define B43legacy_DMA32_RXSTATUS			0x1C

#define		B43legacy_DMA32_RXDPTR			0x00000FFF

#define		B43legacy_DMA32_RXSTATE			0x0000F000

#define			B43legacy_DMA32_RXSTAT_DISABLED	0x00000000

#define			B43legacy_DMA32_RXSTAT_ACTIVE	0x00001000

#define			B43legacy_DMA32_RXSTAT_IDLEWAIT	0x00002000

#define			B43legacy_DMA32_RXSTAT_STOPPED	0x00003000

#define		B43legacy_DMA32_RXERROR			0x000F0000

#define			B43legacy_DMA32_RXERR_NOERR	0x00000000

#define			B43legacy_DMA32_RXERR_PROT	0x00010000

#define			B43legacy_DMA32_RXERR_OVERFLOW	0x00020000

#define			B43legacy_DMA32_RXERR_BUFWRITE	0x00030000

#define			B43legacy_DMA32_RXERR_DESCREAD	0x00040000

#define		B43legacy_DMA32_RXACTIVE		0xFFF00000

/* 32-bit DMA descriptor. */

struct b43legacy_dmadesc32 {
	
__le32 control;
	
__le32 address;
} 
__packed;

#define B43legacy_DMA32_DCTL_BYTECNT		0x00001FFF

#define B43legacy_DMA32_DCTL_ADDREXT_MASK	0x00030000

#define B43legacy_DMA32_DCTL_ADDREXT_SHIFT	16

#define B43legacy_DMA32_DCTL_DTABLEEND		0x10000000

#define B43legacy_DMA32_DCTL_IRQ		0x20000000

#define B43legacy_DMA32_DCTL_FRAMEEND		0x40000000

#define B43legacy_DMA32_DCTL_FRAMESTART		0x80000000


/* Misc DMA constants */

#define B43legacy_DMA_RINGMEMSIZE	PAGE_SIZE

#define B43legacy_DMA0_RX_FRAMEOFFSET	30

#define B43legacy_DMA3_RX_FRAMEOFFSET	0


/* DMA engine tuning knobs */

#define B43legacy_TXRING_SLOTS		128

#define B43legacy_RXRING_SLOTS		64

#define B43legacy_DMA0_RX_BUFFERSIZE	(2304 + 100)

#define B43legacy_DMA3_RX_BUFFERSIZE	16



#ifdef CONFIG_B43LEGACY_DMA


struct sk_buff;
struct b43legacy_private;
struct b43legacy_txstatus;



struct b43legacy_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;
};


enum b43legacy_dmatype {
	
B43legacy_DMA_30BIT = 30,
	
B43legacy_DMA_32BIT = 32,
};


struct b43legacy_dmaring {
	/* Kernel virtual base address of the ring memory. */
	
void *descbase;
	/* Meta data about all descriptors. */
	
struct b43legacy_dmadesc_meta *meta;
	/* Cache of TX headers for each slot.
         * 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 b43legacy_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 b43legacy_wldev *dev;
#ifdef CONFIG_B43LEGACY_DEBUG
	/* Maximum number of used slots. */
	
int max_used_slots;
	/* Last time we injected a ring overflow. */
	
unsigned long last_injected_overflow;
#endif /* CONFIG_B43LEGACY_DEBUG*/
};



static inline u32 b43legacy_dma_read(struct b43legacy_dmaring *ring, u16 offset) { return b43legacy_read32(ring->dev, ring->mmio_base + offset); }

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static inline void b43legacy_dma_write(struct b43legacy_dmaring *ring, u16 offset, u32 value) { b43legacy_write32(ring->dev, ring->mmio_base + offset, value); }

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int b43legacy_dma_init(struct b43legacy_wldev *dev); void b43legacy_dma_free(struct b43legacy_wldev *dev); void b43legacy_dma_tx_suspend(struct b43legacy_wldev *dev); void b43legacy_dma_tx_resume(struct b43legacy_wldev *dev); int b43legacy_dma_tx(struct b43legacy_wldev *dev, struct sk_buff *skb); void b43legacy_dma_handle_txstatus(struct b43legacy_wldev *dev, const struct b43legacy_txstatus *status); void b43legacy_dma_rx(struct b43legacy_dmaring *ring); #else /* CONFIG_B43LEGACY_DMA */
static inline int b43legacy_dma_init(struct b43legacy_wldev *dev) { return 0; }

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static inline void b43legacy_dma_free(struct b43legacy_wldev *dev) { }

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static inline int b43legacy_dma_tx(struct b43legacy_wldev *dev, struct sk_buff *skb) { return 0; }

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static inline void b43legacy_dma_handle_txstatus(struct b43legacy_wldev *dev, const struct b43legacy_txstatus *status) { }

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static inline void b43legacy_dma_rx(struct b43legacy_dmaring *ring) { }

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static inline void b43legacy_dma_tx_suspend(struct b43legacy_wldev *dev) { }

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static inline void b43legacy_dma_tx_resume(struct b43legacy_wldev *dev) { }

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#endif /* CONFIG_B43LEGACY_DMA */ #endif /* B43legacy_DMA_H_ */

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