drivers/net/ethernet/sun/sunbmac.h

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/sun/sunbmac.h

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/sun/sunbmac.h
Extension
.h
Size
17204 bytes
Lines
339
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct be_rxd {
	u32 rx_flags;
	u32 rx_addr;
};

#define RXD_OWN      0x80000000 /* Ownership.      */
#define RXD_UPDATE   0x10000000 /* Being Updated?  */
#define RXD_LENGTH   0x000007ff /* Packet Length.  */

struct be_txd {
	u32 tx_flags;
	u32 tx_addr;
};

#define TXD_OWN      0x80000000 /* Ownership.      */
#define TXD_SOP      0x40000000 /* Start Of Packet */
#define TXD_EOP      0x20000000 /* End Of Packet   */
#define TXD_UPDATE   0x10000000 /* Being Updated?  */
#define TXD_LENGTH   0x000007ff /* Packet Length.  */

#define TX_RING_MAXSIZE   256
#define RX_RING_MAXSIZE   256

#define TX_RING_SIZE      256
#define RX_RING_SIZE      256

#define NEXT_RX(num)       (((num) + 1) & (RX_RING_SIZE - 1))
#define NEXT_TX(num)       (((num) + 1) & (TX_RING_SIZE - 1))
#define PREV_RX(num)       (((num) - 1) & (RX_RING_SIZE - 1))
#define PREV_TX(num)       (((num) - 1) & (TX_RING_SIZE - 1))

#define TX_BUFFS_AVAIL(bp)                                    \
        (((bp)->tx_old <= (bp)->tx_new) ?                     \
	  (bp)->tx_old + (TX_RING_SIZE - 1) - (bp)->tx_new :  \
			    (bp)->tx_old - (bp)->tx_new - 1)


#define RX_COPY_THRESHOLD  256
#define RX_BUF_ALLOC_SIZE  (ETH_FRAME_LEN + (64 * 3))

struct bmac_init_block {
	struct be_rxd be_rxd[RX_RING_MAXSIZE];
	struct be_txd be_txd[TX_RING_MAXSIZE];
};

#define bib_offset(mem, elem) \
((__u32)((unsigned long)(&(((struct bmac_init_block *)0)->mem[elem]))))

/* Now software state stuff. */
enum bigmac_transceiver {
	external = 0,
	internal = 1,
	none     = 2,
};

/* Timer state engine. */
enum bigmac_timer_state {
	ltrywait = 1,  /* Forcing try of all modes, from fastest to slowest. */
	asleep   = 2,  /* Timer inactive.                                    */
};

struct bigmac {
	void __iomem	*gregs;	/* QEC Global Registers               */
	void __iomem	*creg;	/* QEC BigMAC Channel Registers       */
	void __iomem	*bregs;	/* BigMAC Registers                   */
	void __iomem	*tregs;	/* BigMAC Transceiver                 */
	struct bmac_init_block	*bmac_block;	/* RX and TX descriptors */
	dma_addr_t		bblock_dvma;	/* RX and TX descriptors */

	spinlock_t		lock;

	struct sk_buff		*rx_skbs[RX_RING_SIZE];
	struct sk_buff		*tx_skbs[TX_RING_SIZE];

	int rx_new, tx_new, rx_old, tx_old;

	int board_rev;				/* BigMAC board revision.             */

	enum bigmac_transceiver	tcvr_type;
	unsigned int		bigmac_bursts;
	unsigned int		paddr;
	unsigned short		sw_bmsr;         /* SW copy of PHY BMSR               */
	unsigned short		sw_bmcr;         /* SW copy of PHY BMCR               */
	struct timer_list	bigmac_timer;
	enum bigmac_timer_state	timer_state;
	unsigned int		timer_ticks;

	struct platform_device	*qec_op;
	struct platform_device	*bigmac_op;
	struct net_device	*dev;

Annotation

Implementation Notes