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linux/drivers/net/fec_8xx/fec_8xx.h
Stephen Hemminger bea3348eef [NET]: Make NAPI polling independent of struct net_device objects. 
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.

In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.

The signature of the ->poll() call back goes from:

	int foo_poll(struct net_device *dev, int *budget)

to

	int foo_poll(struct napi_struct *napi, int budget)

The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract).  The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.

The napi_struct is to be embedded in the device driver private data
structures.

Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler.  Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.

With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.

Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.

[ Ported to current tree and all drivers converted.  Integrated
  Stephen's follow-on kerneldoc additions, and restored poll_list
  handling to the old style to fix mutual exclusion issues.  -DaveM ]

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10 16:47:45 -07:00

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#ifndef FEC_8XX_H
#define FEC_8XX_H
#include <linux/mii.h>
#include <linux/netdevice.h>
#include <linux/types.h>
/* HW info */
/* CRC polynomium used by the FEC for the multicast group filtering */
#define FEC_CRC_POLY 0x04C11DB7
#define MII_ADVERTISE_HALF (ADVERTISE_100HALF | \
ADVERTISE_10HALF | ADVERTISE_CSMA)
#define MII_ADVERTISE_ALL (ADVERTISE_100FULL | \
ADVERTISE_10FULL | MII_ADVERTISE_HALF)
/* Interrupt events/masks.
*/
#define FEC_ENET_HBERR 0x80000000U /* Heartbeat error */
#define FEC_ENET_BABR 0x40000000U /* Babbling receiver */
#define FEC_ENET_BABT 0x20000000U /* Babbling transmitter */
#define FEC_ENET_GRA 0x10000000U /* Graceful stop complete */
#define FEC_ENET_TXF 0x08000000U /* Full frame transmitted */
#define FEC_ENET_TXB 0x04000000U /* A buffer was transmitted */
#define FEC_ENET_RXF 0x02000000U /* Full frame received */
#define FEC_ENET_RXB 0x01000000U /* A buffer was received */
#define FEC_ENET_MII 0x00800000U /* MII interrupt */
#define FEC_ENET_EBERR 0x00400000U /* SDMA bus error */
#define FEC_ECNTRL_PINMUX 0x00000004
#define FEC_ECNTRL_ETHER_EN 0x00000002
#define FEC_ECNTRL_RESET 0x00000001
#define FEC_RCNTRL_BC_REJ 0x00000010
#define FEC_RCNTRL_PROM 0x00000008
#define FEC_RCNTRL_MII_MODE 0x00000004
#define FEC_RCNTRL_DRT 0x00000002
#define FEC_RCNTRL_LOOP 0x00000001
#define FEC_TCNTRL_FDEN 0x00000004
#define FEC_TCNTRL_HBC 0x00000002
#define FEC_TCNTRL_GTS 0x00000001
/* values for MII phy_status */
#define PHY_CONF_ANE 0x0001 /* 1 auto-negotiation enabled */
#define PHY_CONF_LOOP 0x0002 /* 1 loopback mode enabled */
#define PHY_CONF_SPMASK 0x00f0 /* mask for speed */
#define PHY_CONF_10HDX 0x0010 /* 10 Mbit half duplex supported */
#define PHY_CONF_10FDX 0x0020 /* 10 Mbit full duplex supported */
#define PHY_CONF_100HDX 0x0040 /* 100 Mbit half duplex supported */
#define PHY_CONF_100FDX 0x0080 /* 100 Mbit full duplex supported */
#define PHY_STAT_LINK 0x0100 /* 1 up - 0 down */
#define PHY_STAT_FAULT 0x0200 /* 1 remote fault */
#define PHY_STAT_ANC 0x0400 /* 1 auto-negotiation complete */
#define PHY_STAT_SPMASK 0xf000 /* mask for speed */
#define PHY_STAT_10HDX 0x1000 /* 10 Mbit half duplex selected */
#define PHY_STAT_10FDX 0x2000 /* 10 Mbit full duplex selected */
#define PHY_STAT_100HDX 0x4000 /* 100 Mbit half duplex selected */
#define PHY_STAT_100FDX 0x8000 /* 100 Mbit full duplex selected */
typedef struct phy_info {
unsigned int id;
const char *name;
void (*startup) (struct net_device * dev);
void (*shutdown) (struct net_device * dev);
void (*ack_int) (struct net_device * dev);
} phy_info_t;
/* The FEC stores dest/src/type, data, and checksum for receive packets.
*/
#define MAX_MTU 1508 /* Allow fullsized pppoe packets over VLAN */
#define MIN_MTU 46 /* this is data size */
#define CRC_LEN 4
#define PKT_MAXBUF_SIZE (MAX_MTU+ETH_HLEN+CRC_LEN)
#define PKT_MINBUF_SIZE (MIN_MTU+ETH_HLEN+CRC_LEN)
/* Must be a multiple of 4 */
#define PKT_MAXBLR_SIZE ((PKT_MAXBUF_SIZE+3) & ~3)
/* This is needed so that invalidate_xxx wont invalidate too much */
#define ENET_RX_FRSIZE L1_CACHE_ALIGN(PKT_MAXBUF_SIZE)
/* platform interface */
struct fec_platform_info {
int fec_no; /* FEC index */
int use_mdio; /* use external MII */
int phy_addr; /* the phy address */
int fec_irq, phy_irq; /* the irq for the controller */
int rx_ring, tx_ring; /* number of buffers on rx */
int sys_clk; /* system clock */
__u8 macaddr[6]; /* mac address */
int rx_copybreak; /* limit we copy small frames */
int use_napi; /* use NAPI */
int napi_weight; /* NAPI weight */
};
/* forward declaration */
struct fec;
struct fec_enet_private {
spinlock_t lock; /* during all ops except TX pckt processing */
spinlock_t tx_lock; /* during fec_start_xmit and fec_tx */
struct net_device *dev;
struct napi_struct napi;
int fecno;
struct fec *fecp;
const struct fec_platform_info *fpi;
int rx_ring, tx_ring;
dma_addr_t ring_mem_addr;
void *ring_base;
struct sk_buff **rx_skbuff;
struct sk_buff **tx_skbuff;
cbd_t *rx_bd_base; /* Address of Rx and Tx buffers. */
cbd_t *tx_bd_base;
cbd_t *dirty_tx; /* ring entries to be free()ed. */
cbd_t *cur_rx;
cbd_t *cur_tx;
int tx_free;
struct net_device_stats stats;
struct timer_list phy_timer_list;
const struct phy_info *phy;
unsigned int fec_phy_speed;
__u32 msg_enable;
struct mii_if_info mii_if;
};
/***************************************************************************/
void fec_restart(struct net_device *dev, int duplex, int speed);
void fec_stop(struct net_device *dev);
/***************************************************************************/
int fec_mii_read(struct net_device *dev, int phy_id, int location);
void fec_mii_write(struct net_device *dev, int phy_id, int location, int value);
int fec_mii_phy_id_detect(struct net_device *dev);
void fec_mii_startup(struct net_device *dev);
void fec_mii_shutdown(struct net_device *dev);
void fec_mii_ack_int(struct net_device *dev);
void fec_mii_link_status_change_check(struct net_device *dev, int init_media);
/***************************************************************************/
#define FEC1_NO 0x00
#define FEC2_NO 0x01
#define FEC3_NO 0x02
int fec_8xx_init_one(const struct fec_platform_info *fpi,
struct net_device **devp);
int fec_8xx_cleanup_one(struct net_device *dev);
/***************************************************************************/
#define DRV_MODULE_NAME "fec_8xx"
#define PFX DRV_MODULE_NAME ": "
#define DRV_MODULE_VERSION "0.1"
#define DRV_MODULE_RELDATE "May 6, 2004"
/***************************************************************************/
int fec_8xx_platform_init(void);
void fec_8xx_platform_cleanup(void);
/***************************************************************************/
/* FEC access macros */
#if defined(CONFIG_8xx)
/* for a 8xx __raw_xxx's are sufficient */
#define __fec_out32(addr, x) __raw_writel(x, addr)
#define __fec_out16(addr, x) __raw_writew(x, addr)
#define __fec_in32(addr) __raw_readl(addr)
#define __fec_in16(addr) __raw_readw(addr)
#else
/* for others play it safe */
#define __fec_out32(addr, x) out_be32(addr, x)
#define __fec_out16(addr, x) out_be16(addr, x)
#define __fec_in32(addr) in_be32(addr)
#define __fec_in16(addr) in_be16(addr)
#endif
/* write */
#define FW(_fecp, _reg, _v) __fec_out32(&(_fecp)->fec_ ## _reg, (_v))
/* read */
#define FR(_fecp, _reg) __fec_in32(&(_fecp)->fec_ ## _reg)
/* set bits */
#define FS(_fecp, _reg, _v) FW(_fecp, _reg, FR(_fecp, _reg) | (_v))
/* clear bits */
#define FC(_fecp, _reg, _v) FW(_fecp, _reg, FR(_fecp, _reg) & ~(_v))
/* buffer descriptor access macros */
/* write */
#define CBDW_SC(_cbd, _sc) __fec_out16(&(_cbd)->cbd_sc, (_sc))
#define CBDW_DATLEN(_cbd, _datlen) __fec_out16(&(_cbd)->cbd_datlen, (_datlen))
#define CBDW_BUFADDR(_cbd, _bufaddr) __fec_out32(&(_cbd)->cbd_bufaddr, (_bufaddr))
/* read */
#define CBDR_SC(_cbd) __fec_in16(&(_cbd)->cbd_sc)
#define CBDR_DATLEN(_cbd) __fec_in16(&(_cbd)->cbd_datlen)
#define CBDR_BUFADDR(_cbd) __fec_in32(&(_cbd)->cbd_bufaddr)
/* set bits */
#define CBDS_SC(_cbd, _sc) CBDW_SC(_cbd, CBDR_SC(_cbd) | (_sc))
/* clear bits */
#define CBDC_SC(_cbd, _sc) CBDW_SC(_cbd, CBDR_SC(_cbd) & ~(_sc))
/***************************************************************************/
#endif
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