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linux/drivers/net/fs_enet/fs_enet.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

256 lines
7.1 KiB
C
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#ifndef FS_ENET_H
#define FS_ENET_H
#include <linux/mii.h>
#include <linux/netdevice.h>
#include <linux/types.h>
#include <linux/list.h>
#include <linux/phy.h>
#include <linux/dma-mapping.h>
#include <linux/fs_enet_pd.h>
#include <asm/fs_pd.h>
#ifdef CONFIG_CPM1
#include <asm/commproc.h>
struct fec_info {
fec_t* fecp;
u32 mii_speed;
};
#endif
#ifdef CONFIG_CPM2
#include <asm/cpm2.h>
#endif
/* This is used to operate with pins.
Note that the actual port size may
be different; cpm(s) handle it OK */
struct bb_info {
u8 mdio_dat_msk;
u8 mdio_dir_msk;
u8 *mdio_dir;
u8 *mdio_dat;
u8 mdc_msk;
u8 *mdc_dat;
int delay;
};
/* hw driver ops */
struct fs_ops {
int (*setup_data)(struct net_device *dev);
int (*allocate_bd)(struct net_device *dev);
void (*free_bd)(struct net_device *dev);
void (*cleanup_data)(struct net_device *dev);
void (*set_multicast_list)(struct net_device *dev);
void (*adjust_link)(struct net_device *dev);
void (*restart)(struct net_device *dev);
void (*stop)(struct net_device *dev);
void (*pre_request_irq)(struct net_device *dev, int irq);
void (*post_free_irq)(struct net_device *dev, int irq);
void (*napi_clear_rx_event)(struct net_device *dev);
void (*napi_enable_rx)(struct net_device *dev);
void (*napi_disable_rx)(struct net_device *dev);
void (*rx_bd_done)(struct net_device *dev);
void (*tx_kickstart)(struct net_device *dev);
u32 (*get_int_events)(struct net_device *dev);
void (*clear_int_events)(struct net_device *dev, u32 int_events);
void (*ev_error)(struct net_device *dev, u32 int_events);
int (*get_regs)(struct net_device *dev, void *p, int *sizep);
int (*get_regs_len)(struct net_device *dev);
void (*tx_restart)(struct net_device *dev);
};
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);
};
/* 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 32 (to cover both FEC & FCC) */
#define PKT_MAXBLR_SIZE ((PKT_MAXBUF_SIZE + 31) & ~31)
/* This is needed so that invalidate_xxx wont invalidate too much */
#define ENET_RX_FRSIZE L1_CACHE_ALIGN(PKT_MAXBUF_SIZE)
struct fs_enet_mii_bus {
struct list_head list;
spinlock_t mii_lock;
const struct fs_mii_bus_info *bus_info;
int refs;
u32 usage_map;
int (*mii_read)(struct fs_enet_mii_bus *bus,
int phy_id, int location);
void (*mii_write)(struct fs_enet_mii_bus *bus,
int phy_id, int location, int value);
union {
struct {
unsigned int mii_speed;
void *fecp;
} fec;
struct {
/* note that the actual port size may */
/* be different; cpm(s) handle it OK */
u8 mdio_msk;
u8 *mdio_dir;
u8 *mdio_dat;
u8 mdc_msk;
u8 *mdc_dir;
u8 *mdc_dat;
} bitbang;
struct {
u16 lpa;
} fixed;
};
};
struct fs_enet_private {
struct napi_struct napi;
struct device *dev; /* pointer back to the device (must be initialized first) */
spinlock_t lock; /* during all ops except TX pckt processing */
spinlock_t tx_lock; /* during fs_start_xmit and fs_tx */
const struct fs_platform_info *fpi;
const struct fs_ops *ops;
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;
u32 msg_enable;
struct mii_if_info mii_if;
unsigned int last_mii_status;
struct fs_enet_mii_bus *mii_bus;
int interrupt;
struct phy_device *phydev;
int oldduplex, oldspeed, oldlink; /* current settings */
/* event masks */
u32 ev_napi_rx; /* mask of NAPI rx events */
u32 ev_rx; /* rx event mask */
u32 ev_tx; /* tx event mask */
u32 ev_err; /* error event mask */
u16 bd_rx_empty; /* mask of BD rx empty */
u16 bd_rx_err; /* mask of BD rx errors */
union {
struct {
int idx; /* FEC1 = 0, FEC2 = 1 */
void *fecp; /* hw registers */
u32 hthi, htlo; /* state for multicast */
} fec;
struct {
int idx; /* FCC1-3 = 0-2 */
void *fccp; /* hw registers */
void *ep; /* parameter ram */
void *fcccp; /* hw registers cont. */
void *mem; /* FCC DPRAM */
u32 gaddrh, gaddrl; /* group address */
} fcc;
struct {
int idx; /* FEC1 = 0, FEC2 = 1 */
void *sccp; /* hw registers */
void *ep; /* parameter ram */
u32 hthi, htlo; /* state for multicast */
} scc;
};
};
/***************************************************************************/
int fs_enet_mdio_bb_init(void);
int fs_mii_fixed_init(struct fs_enet_mii_bus *bus);
int fs_enet_mdio_fec_init(void);
void fs_init_bds(struct net_device *dev);
void fs_cleanup_bds(struct net_device *dev);
/***************************************************************************/
#define DRV_MODULE_NAME "fs_enet"
#define PFX DRV_MODULE_NAME ": "
#define DRV_MODULE_VERSION "1.0"
#define DRV_MODULE_RELDATE "Aug 8, 2005"
/***************************************************************************/
int fs_enet_platform_init(void);
void fs_enet_platform_cleanup(void);
/***************************************************************************/
/* buffer descriptor access macros */
/* access macros */
#if defined(CONFIG_CPM1)
/* for a a CPM1 __raw_xxx's are sufficient */
#define __cbd_out32(addr, x) __raw_writel(x, addr)
#define __cbd_out16(addr, x) __raw_writew(x, addr)
#define __cbd_in32(addr) __raw_readl(addr)
#define __cbd_in16(addr) __raw_readw(addr)
#else
/* for others play it safe */
#define __cbd_out32(addr, x) out_be32(addr, x)
#define __cbd_out16(addr, x) out_be16(addr, x)
#define __cbd_in32(addr) in_be32(addr)
#define __cbd_in16(addr) in_be16(addr)
#endif
/* write */
#define CBDW_SC(_cbd, _sc) __cbd_out16(&(_cbd)->cbd_sc, (_sc))
#define CBDW_DATLEN(_cbd, _datlen) __cbd_out16(&(_cbd)->cbd_datlen, (_datlen))
#define CBDW_BUFADDR(_cbd, _bufaddr) __cbd_out32(&(_cbd)->cbd_bufaddr, (_bufaddr))
/* read */
#define CBDR_SC(_cbd) __cbd_in16(&(_cbd)->cbd_sc)
#define CBDR_DATLEN(_cbd) __cbd_in16(&(_cbd)->cbd_datlen)
#define CBDR_BUFADDR(_cbd) __cbd_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))
/*******************************************************************/
extern const struct fs_ops fs_fec_ops;
extern const struct fs_ops fs_fcc_ops;
extern const struct fs_ops fs_scc_ops;
/*******************************************************************/
/* handy pointer to the immap */
extern void *fs_enet_immap;
/*******************************************************************/
#endif
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