cregit-Linux how code gets into the kernel

Release 4.7 include/linux/mdio.h

Directory: include/linux
/*
 * linux/mdio.h: definitions for MDIO (clause 45) transceivers
 * Copyright 2006-2009 Solarflare Communications Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation, incorporated herein by reference.
 */
#ifndef __LINUX_MDIO_H__

#define __LINUX_MDIO_H__

#include <uapi/linux/mdio.h>

struct mii_bus;

/* Multiple levels of nesting are possible. However typically this is
 * limited to nested DSA like layer, a MUX layer, and the normal
 * user. Instead of trying to handle the general case, just define
 * these cases.
 */

enum mdio_mutex_lock_class {
	
MDIO_MUTEX_NORMAL,
	
MDIO_MUTEX_MUX,
	
MDIO_MUTEX_NESTED,
};


struct mdio_device {
	
struct device dev;

	
const struct dev_pm_ops *pm_ops;
	
struct mii_bus *bus;

	
int (*bus_match)(struct device *dev, struct device_driver *drv);
	
void (*device_free)(struct mdio_device *mdiodev);
	
void (*device_remove)(struct mdio_device *mdiodev);

	/* Bus address of the MDIO device (0-31) */
	
int addr;
	
int flags;
};

#define to_mdio_device(d) container_of(d, struct mdio_device, dev)

/* struct mdio_driver_common: Common to all MDIO drivers */

struct mdio_driver_common {
	
struct device_driver driver;
	
int flags;
};

#define MDIO_DEVICE_FLAG_PHY		1

#define to_mdio_common_driver(d) \
	container_of(d, struct mdio_driver_common, driver)

/* struct mdio_driver: Generic MDIO driver */

struct mdio_driver {
	
struct mdio_driver_common mdiodrv;

	/*
         * Called during discovery.  Used to set
         * up device-specific structures, if any
         */
	
int (*probe)(struct mdio_device *mdiodev);

	/* Clears up any memory if needed */
	
void (*remove)(struct mdio_device *mdiodev);
};

#define to_mdio_driver(d)						\
	container_of(to_mdio_common_driver(d), struct mdio_driver, mdiodrv)

void mdio_device_free(struct mdio_device *mdiodev);
struct mdio_device *mdio_device_create(struct mii_bus *bus, int addr);
int mdio_device_register(struct mdio_device *mdiodev);
void mdio_device_remove(struct mdio_device *mdiodev);
int mdio_driver_register(struct mdio_driver *drv);
void mdio_driver_unregister(struct mdio_driver *drv);


static inline bool mdio_phy_id_is_c45(int phy_id) { return (phy_id & MDIO_PHY_ID_C45) && !(phy_id & ~MDIO_PHY_ID_C45_MASK); }

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static inline __u16 mdio_phy_id_prtad(int phy_id) { return (phy_id & MDIO_PHY_ID_PRTAD) >> 5; }

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static inline __u16 mdio_phy_id_devad(int phy_id) { return phy_id & MDIO_PHY_ID_DEVAD; }

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/** * struct mdio_if_info - Ethernet controller MDIO interface * @prtad: PRTAD of the PHY (%MDIO_PRTAD_NONE if not present/unknown) * @mmds: Mask of MMDs expected to be present in the PHY. This must be * non-zero unless @prtad = %MDIO_PRTAD_NONE. * @mode_support: MDIO modes supported. If %MDIO_SUPPORTS_C22 is set then * MII register access will be passed through with @devad = * %MDIO_DEVAD_NONE. If %MDIO_EMULATE_C22 is set then access to * commonly used clause 22 registers will be translated into * clause 45 registers. * @dev: Net device structure * @mdio_read: Register read function; returns value or negative error code * @mdio_write: Register write function; returns 0 or negative error code */ struct mdio_if_info { int prtad; u32 mmds; unsigned mode_support; struct net_device *dev; int (*mdio_read)(struct net_device *dev, int prtad, int devad, u16 addr); int (*mdio_write)(struct net_device *dev, int prtad, int devad, u16 addr, u16 val); }; #define MDIO_PRTAD_NONE (-1) #define MDIO_DEVAD_NONE (-1) #define MDIO_SUPPORTS_C22 1 #define MDIO_SUPPORTS_C45 2 #define MDIO_EMULATE_C22 4 struct ethtool_cmd; struct ethtool_pauseparam; extern int mdio45_probe(struct mdio_if_info *mdio, int prtad); extern int mdio_set_flag(const struct mdio_if_info *mdio, int prtad, int devad, u16 addr, int mask, bool sense); extern int mdio45_links_ok(const struct mdio_if_info *mdio, u32 mmds); extern int mdio45_nway_restart(const struct mdio_if_info *mdio); extern void mdio45_ethtool_gset_npage(const struct mdio_if_info *mdio, struct ethtool_cmd *ecmd, u32 npage_adv, u32 npage_lpa); /** * mdio45_ethtool_gset - get settings for ETHTOOL_GSET * @mdio: MDIO interface * @ecmd: Ethtool request structure * * Since the CSRs for auto-negotiation using next pages are not fully * standardised, this function does not attempt to decode them. Use * mdio45_ethtool_gset_npage() to specify advertisement bits from next * pages. */
static inline void mdio45_ethtool_gset(const struct mdio_if_info *mdio, struct ethtool_cmd *ecmd) { mdio45_ethtool_gset_npage(mdio, ecmd, 0, 0); }

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extern int mdio_mii_ioctl(const struct mdio_if_info *mdio, struct mii_ioctl_data *mii_data, int cmd); /** * mmd_eee_cap_to_ethtool_sup_t * @eee_cap: value of the MMD EEE Capability register * * A small helper function that translates MMD EEE Capability (3.20) bits * to ethtool supported settings. */
static inline u32 mmd_eee_cap_to_ethtool_sup_t(u16 eee_cap) { u32 supported = 0; if (eee_cap & MDIO_EEE_100TX) supported |= SUPPORTED_100baseT_Full; if (eee_cap & MDIO_EEE_1000T) supported |= SUPPORTED_1000baseT_Full; if (eee_cap & MDIO_EEE_10GT) supported |= SUPPORTED_10000baseT_Full; if (eee_cap & MDIO_EEE_1000KX) supported |= SUPPORTED_1000baseKX_Full; if (eee_cap & MDIO_EEE_10GKX4) supported |= SUPPORTED_10000baseKX4_Full; if (eee_cap & MDIO_EEE_10GKR) supported |= SUPPORTED_10000baseKR_Full; return supported; }

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/** * mmd_eee_adv_to_ethtool_adv_t * @eee_adv: value of the MMD EEE Advertisement/Link Partner Ability registers * * A small helper function that translates the MMD EEE Advertisment (7.60) * and MMD EEE Link Partner Ability (7.61) bits to ethtool advertisement * settings. */
static inline u32 mmd_eee_adv_to_ethtool_adv_t(u16 eee_adv) { u32 adv = 0; if (eee_adv & MDIO_EEE_100TX) adv |= ADVERTISED_100baseT_Full; if (eee_adv & MDIO_EEE_1000T) adv |= ADVERTISED_1000baseT_Full; if (eee_adv & MDIO_EEE_10GT) adv |= ADVERTISED_10000baseT_Full; if (eee_adv & MDIO_EEE_1000KX) adv |= ADVERTISED_1000baseKX_Full; if (eee_adv & MDIO_EEE_10GKX4) adv |= ADVERTISED_10000baseKX4_Full; if (eee_adv & MDIO_EEE_10GKR) adv |= ADVERTISED_10000baseKR_Full; return adv; }

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/** * ethtool_adv_to_mmd_eee_adv_t * @adv: the ethtool advertisement settings * * A small helper function that translates ethtool advertisement settings * to EEE advertisements for the MMD EEE Advertisement (7.60) and * MMD EEE Link Partner Ability (7.61) registers. */
static inline u16 ethtool_adv_to_mmd_eee_adv_t(u32 adv) { u16 reg = 0; if (adv & ADVERTISED_100baseT_Full) reg |= MDIO_EEE_100TX; if (adv & ADVERTISED_1000baseT_Full) reg |= MDIO_EEE_1000T; if (adv & ADVERTISED_10000baseT_Full) reg |= MDIO_EEE_10GT; if (adv & ADVERTISED_1000baseKX_Full) reg |= MDIO_EEE_1000KX; if (adv & ADVERTISED_10000baseKX4_Full) reg |= MDIO_EEE_10GKX4; if (adv & ADVERTISED_10000baseKR_Full) reg |= MDIO_EEE_10GKR; return reg; }

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int mdiobus_read(struct mii_bus *bus, int addr, u32 regnum); int mdiobus_read_nested(struct mii_bus *bus, int addr, u32 regnum); int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val); int mdiobus_write_nested(struct mii_bus *bus, int addr, u32 regnum, u16 val); int mdiobus_register_device(struct mdio_device *mdiodev); int mdiobus_unregister_device(struct mdio_device *mdiodev); bool mdiobus_is_registered_device(struct mii_bus *bus, int addr); struct phy_device *mdiobus_get_phy(struct mii_bus *bus, int addr); /** * module_mdio_driver() - Helper macro for registering mdio drivers * * Helper macro for MDIO drivers which do not do anything special in module * init/exit. Each module may only use this macro once, and calling it * replaces module_init() and module_exit(). */ #define mdio_module_driver(_mdio_driver) \ static int __init mdio_module_init(void) \ { \ return mdio_driver_register(&_mdio_driver); \ } \ module_init(mdio_module_init); \ static void __exit mdio_module_exit(void) \ { \ mdio_driver_unregister(&_mdio_driver); \ } \ module_exit(mdio_module_exit) #endif /* __LINUX_MDIO_H__ */

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Directory: include/linux
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