kcompat_ethtool.c

Atheros公司AR8121/AR8113无线网卡的Linux驱动

	if (!ethtool_ops->set_tx_csum)
		return -EOPNOTSUPP;

	if (copy_from_user(&edata, useraddr, sizeof(edata)))
		return -EFAULT;

	return ethtool_ops->set_tx_csum(dev, edata.data);
}

static int ethtool_get_sg(struct net_device *dev, char *useraddr)
{
	struct ethtool_value edata = { ETHTOOL_GSG };

	if (!ethtool_ops->get_sg)
		return -EOPNOTSUPP;

	edata.data = ethtool_ops->get_sg(dev);

	if (copy_to_user(useraddr, &edata, sizeof(edata)))
		return -EFAULT;
	return 0;
}

static int ethtool_set_sg(struct net_device *dev, char *useraddr)
{
	struct ethtool_value edata;

	if (!ethtool_ops->set_sg)
		return -EOPNOTSUPP;

	if (copy_from_user(&edata, useraddr, sizeof(edata)))
		return -EFAULT;

	return ethtool_ops->set_sg(dev, edata.data);
}

static int ethtool_get_tso(struct net_device *dev, char *useraddr)
{
	struct ethtool_value edata = { ETHTOOL_GTSO };

	if (!ethtool_ops->get_tso)
		return -EOPNOTSUPP;

	edata.data = ethtool_ops->get_tso(dev);

	if (copy_to_user(useraddr, &edata, sizeof(edata)))
		return -EFAULT;
	return 0;
}

static int ethtool_set_tso(struct net_device *dev, char *useraddr)
{
	struct ethtool_value edata;

	if (!ethtool_ops->set_tso)
		return -EOPNOTSUPP;

	if (copy_from_user(&edata, useraddr, sizeof(edata)))
		return -EFAULT;

	return ethtool_ops->set_tso(dev, edata.data);
}

static int ethtool_self_test(struct net_device *dev, char *useraddr)
{
	struct ethtool_test test;
	struct ethtool_ops *ops = ethtool_ops;
	u64 *data;
	int ret;

	if (!ops->self_test || !ops->self_test_count)
		return -EOPNOTSUPP;

	if (copy_from_user(&test, useraddr, sizeof(test)))
		return -EFAULT;

	test.len = ops->self_test_count(dev);
	data = kmalloc(test.len * sizeof(u64), GFP_USER);
	if (!data)
		return -ENOMEM;

	ops->self_test(dev, &test, data);

	ret = -EFAULT;
	if (copy_to_user(useraddr, &test, sizeof(test)))
		goto out;
	useraddr += sizeof(test);
	if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
		goto out;
	ret = 0;

out:
	kfree(data);
	return ret;
}

static int ethtool_get_strings(struct net_device *dev, void *useraddr)
{
	struct ethtool_gstrings gstrings;
	struct ethtool_ops *ops = ethtool_ops;
	u8 *data;
	int ret;

	if (!ops->get_strings)
		return -EOPNOTSUPP;

	if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
		return -EFAULT;

	switch (gstrings.string_set) {
	case ETH_SS_TEST:
		if (!ops->self_test_count)
			return -EOPNOTSUPP;
		gstrings.len = ops->self_test_count(dev);
		break;
	case ETH_SS_STATS:
		if (!ops->get_stats_count)
			return -EOPNOTSUPP;
		gstrings.len = ops->get_stats_count(dev);
		break;
	default:
		return -EINVAL;
	}

	data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
	if (!data)
		return -ENOMEM;

	ops->get_strings(dev, gstrings.string_set, data);

	ret = -EFAULT;
	if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
		goto out;
	useraddr += sizeof(gstrings);
	if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
		goto out;
	ret = 0;

out:
	kfree(data);
	return ret;
}

static int ethtool_phys_id(struct net_device *dev, void *useraddr)
{
	struct ethtool_value id;

	if (!ethtool_ops->phys_id)
		return -EOPNOTSUPP;

	if (copy_from_user(&id, useraddr, sizeof(id)))
		return -EFAULT;

	return ethtool_ops->phys_id(dev, id.data);
}

static int ethtool_get_stats(struct net_device *dev, void *useraddr)
{
	struct ethtool_stats stats;
	struct ethtool_ops *ops = ethtool_ops;
	u64 *data;
	int ret;

	if (!ops->get_ethtool_stats || !ops->get_stats_count)
		return -EOPNOTSUPP;

	if (copy_from_user(&stats, useraddr, sizeof(stats)))
		return -EFAULT;

	stats.n_stats = ops->get_stats_count(dev);
	data = kmalloc(stats.n_stats * sizeof(u64), GFP_USER);
	if (!data)
		return -ENOMEM;

	ops->get_ethtool_stats(dev, &stats, data);

	ret = -EFAULT;
	if (copy_to_user(useraddr, &stats, sizeof(stats)))
		goto out;
	useraddr += sizeof(stats);
	if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
		goto out;
	ret = 0;

out:
	kfree(data);
	return ret;
}

/* The main entry point in this file.  Called from net/core/dev.c */

#define ETHTOOL_OPS_COMPAT
int ethtool_ioctl(struct ifreq *ifr)
{
	struct net_device *dev = __dev_get_by_name(ifr->ifr_name);
	void *useraddr = (void *) ifr->ifr_data;
	u32 ethcmd;

	/*
	 * XXX: This can be pushed down into the ethtool_* handlers that
	 * need it.  Keep existing behaviour for the moment.
	 */
	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	if (!dev || !netif_device_present(dev))
		return -ENODEV;

	if (copy_from_user(&ethcmd, useraddr, sizeof (ethcmd)))
		return -EFAULT;

	switch (ethcmd) {
	case ETHTOOL_GSET:
		return ethtool_get_settings(dev, useraddr);
	case ETHTOOL_SSET:
		return ethtool_set_settings(dev, useraddr);
	case ETHTOOL_GDRVINFO:
		return ethtool_get_drvinfo(dev, useraddr);
	case ETHTOOL_GREGS:
		return ethtool_get_regs(dev, useraddr);
	case ETHTOOL_GWOL:
		return ethtool_get_wol(dev, useraddr);
	case ETHTOOL_SWOL:
		return ethtool_set_wol(dev, useraddr);
	case ETHTOOL_GMSGLVL:
		return ethtool_get_msglevel(dev, useraddr);
	case ETHTOOL_SMSGLVL:
		return ethtool_set_msglevel(dev, useraddr);
	case ETHTOOL_NWAY_RST:
		return ethtool_nway_reset(dev);
	case ETHTOOL_GLINK:
		return ethtool_get_link(dev, useraddr);
	case ETHTOOL_GEEPROM:
		return ethtool_get_eeprom(dev, useraddr);
	case ETHTOOL_SEEPROM:
		return ethtool_set_eeprom(dev, useraddr);
	case ETHTOOL_GCOALESCE:
		return ethtool_get_coalesce(dev, useraddr);
	case ETHTOOL_SCOALESCE:
		return ethtool_set_coalesce(dev, useraddr);
	case ETHTOOL_GRINGPARAM:
		return ethtool_get_ringparam(dev, useraddr);
	case ETHTOOL_SRINGPARAM:
		return ethtool_set_ringparam(dev, useraddr);
	case ETHTOOL_GPAUSEPARAM:
		return ethtool_get_pauseparam(dev, useraddr);
	case ETHTOOL_SPAUSEPARAM:
		return ethtool_set_pauseparam(dev, useraddr);
	case ETHTOOL_GRXCSUM:
		return ethtool_get_rx_csum(dev, useraddr);
	case ETHTOOL_SRXCSUM:
		return ethtool_set_rx_csum(dev, useraddr);
	case ETHTOOL_GTXCSUM:
		return ethtool_get_tx_csum(dev, useraddr);
	case ETHTOOL_STXCSUM:
		return ethtool_set_tx_csum(dev, useraddr);
	case ETHTOOL_GSG:
		return ethtool_get_sg(dev, useraddr);
	case ETHTOOL_SSG:
		return ethtool_set_sg(dev, useraddr);
	case ETHTOOL_GTSO:
		return ethtool_get_tso(dev, useraddr);
	case ETHTOOL_STSO:
		return ethtool_set_tso(dev, useraddr);
	case ETHTOOL_TEST:
		return ethtool_self_test(dev, useraddr);
	case ETHTOOL_GSTRINGS:
		return ethtool_get_strings(dev, useraddr);
	case ETHTOOL_PHYS_ID:
		return ethtool_phys_id(dev, useraddr);
	case ETHTOOL_GSTATS:
		return ethtool_get_stats(dev, useraddr);
	default:
		return -EOPNOTSUPP;
	}

	return -EOPNOTSUPP;
}

#define mii_if_info _kc_mii_if_info
struct _kc_mii_if_info {
	int phy_id;
	int advertising;
	int phy_id_mask;
	int reg_num_mask;

	unsigned int full_duplex : 1;	/* is full duplex? */
	unsigned int force_media : 1;	/* is autoneg. disabled? */

	struct net_device *dev;
	int (*mdio_read) (struct net_device *dev, int phy_id, int location);
	void (*mdio_write) (struct net_device *dev, int phy_id, int location, int val);
};

struct ethtool_cmd;
struct mii_ioctl_data;

#undef mii_link_ok
#define mii_link_ok _kc_mii_link_ok
#undef mii_nway_restart
#define mii_nway_restart _kc_mii_nway_restart
#undef mii_ethtool_gset
#define mii_ethtool_gset _kc_mii_ethtool_gset
#undef mii_ethtool_sset
#define mii_ethtool_sset _kc_mii_ethtool_sset
#undef mii_check_link
#define mii_check_link _kc_mii_check_link
#undef generic_mii_ioctl
#define generic_mii_ioctl _kc_generic_mii_ioctl
extern int _kc_mii_link_ok (struct mii_if_info *mii);
extern int _kc_mii_nway_restart (struct mii_if_info *mii);
extern int _kc_mii_ethtool_gset(struct mii_if_info *mii,
                                struct ethtool_cmd *ecmd);
extern int _kc_mii_ethtool_sset(struct mii_if_info *mii,
                                struct ethtool_cmd *ecmd);
extern void _kc_mii_check_link (struct mii_if_info *mii);
extern int _kc_generic_mii_ioctl(struct mii_if_info *mii_if,
                                 struct mii_ioctl_data *mii_data, int cmd,
                                 unsigned int *duplex_changed);


struct _kc_pci_dev_ext {
	struct pci_dev *dev;
	void *pci_drvdata;
	struct pci_driver *driver;
};

struct _kc_net_dev_ext {
	struct net_device *dev;
	unsigned int carrier;
};


/**************************************/
/* mii support */

int _kc_mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd)
{
	struct net_device *dev = mii->dev;
	u32 advert, bmcr, lpa, nego;

	ecmd->supported =
	    (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
	     SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
	     SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII);

	/* only supports twisted-pair */
	ecmd->port = PORT_MII;

	/* only supports internal transceiver */
	ecmd->transceiver = XCVR_INTERNAL;

	/* this isn't fully supported at higher layers */
	ecmd->phy_address = mii->phy_id;

	ecmd->advertising = ADVERTISED_TP | ADVERTISED_MII;
	advert = mii->mdio_read(dev, mii->phy_id, MII_ADVERTISE);
	if (advert & ADVERTISE_10HALF)
		ecmd->advertising |= ADVERTISED_10baseT_Half;
	if (advert & ADVERTISE_10FULL)
		ecmd->advertising |= ADVERTISED_10baseT_Full;
	if (advert & ADVERTISE_100HALF)
		ecmd->advertising |= ADVERTISED_100baseT_Half;
	if (advert & ADVERTISE_100FULL)
		ecmd->advertising |= ADVERTISED_100baseT_Full;

	bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
	lpa = mii->mdio_read(dev, mii->phy_id, MII_LPA);
	if (bmcr & BMCR_ANENABLE) {
		ecmd->advertising |= ADVERTISED_Autoneg;
		ecmd->autoneg = AUTONEG_ENABLE;
		
		nego = mii_nway_result(advert & lpa);
		if (nego == LPA_100FULL || nego == LPA_100HALF)
			ecmd->speed = SPEED_100;
		else
			ecmd->speed = SPEED_10;
		if (nego == LPA_100FULL || nego == LPA_10FULL) {
			ecmd->duplex = DUPLEX_FULL;
			mii->full_duplex = 1;
		} else {
			ecmd->duplex = DUPLEX_HALF;
			mii->full_duplex = 0;
		}
	} else {
		ecmd->autoneg = AUTONEG_DISABLE;

		ecmd->speed = (bmcr & BMCR_SPEED100) ? SPEED_100 : SPEED_10;
		ecmd->duplex = (bmcr & BMCR_FULLDPLX) ? DUPLEX_FULL : DUPLEX_HALF;
	}

	/* ignore maxtxpkt, maxrxpkt for now */

	return 0;
}

int _kc_mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd)
{
	struct net_device *dev = mii->dev;

	if (ecmd->speed != SPEED_10 && ecmd->speed != SPEED_100)
		return -EINVAL;
	if (ecmd->duplex != DUPLEX_HALF && ecmd->duplex != DUPLEX_FULL)
		return -EINVAL;
	if (ecmd->port != PORT_MII)
		return -EINVAL;
	if (ecmd->transceiver != XCVR_INTERNAL)
		return -EINVAL;
	if (ecmd->phy_address != mii->phy_id)
		return -EINVAL;
	if (ecmd->autoneg != AUTONEG_DISABLE && ecmd->autoneg != AUTONEG_ENABLE)
		return -EINVAL;
				  
	/* ignore supported, maxtxpkt, maxrxpkt */
	
	if (ecmd->autoneg == AUTONEG_ENABLE) {
		u32 bmcr, advert, tmp;

		if ((ecmd->advertising & (ADVERTISED_10baseT_Half |
					  ADVERTISED_10baseT_Full |
					  ADVERTISED_100baseT_Half |
					  ADVERTISED_100baseT_Full)) == 0)
			return -EINVAL;

		/* advertise only what has been requested */
		advert = mii->mdio_read(dev, mii->phy_id, MII_ADVERTISE);
		tmp = advert & ~(ADVERTISE_ALL | ADVERTISE_100BASE4);
		if (ADVERTISED_10baseT_Half)
			tmp |= ADVERTISE_10HALF;
		if (ADVERTISED_10baseT_Full)
			tmp |= ADVERTISE_10FULL;
		if (ADVERTISED_100baseT_Half)
			tmp |= ADVERTISE_100HALF;
		if (ADVERTISED_100baseT_Full)
			tmp |= ADVERTISE_100FULL;
		if (advert != tmp) {
			mii->mdio_write(dev, mii->phy_id, MII_ADVERTISE, tmp);
			mii->advertising = tmp;
		}
		
		/* turn on autonegotiation, and force a renegotiate */
		bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
		bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
		mii->mdio_write(dev, mii->phy_id, MII_BMCR, bmcr);

		mii->force_media = 0;
	} else {
		u32 bmcr, tmp;

		/* turn off auto negotiation, set speed and duplexity */
		bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
		tmp = bmcr & ~(BMCR_ANENABLE | BMCR_SPEED100 | BMCR_FULLDPLX);
		if (ecmd->speed == SPEED_100)
			tmp |= BMCR_SPEED100;
		if (ecmd->duplex == DUPLEX_FULL) {
			tmp |= BMCR_FULLDPLX;
			mii->full_duplex = 1;
		} else
			mii->full_duplex = 0;
		if (bmcr != tmp)
			mii->mdio_write(dev, mii->phy_id, MII_BMCR, tmp);

		mii->force_media = 1;
	}
	return 0;
}

int _kc_mii_link_ok (struct mii_if_info *mii)
{
	/* first, a dummy read, needed to latch some MII phys */
	mii->mdio_read(mii->dev, mii->phy_id, MII_BMSR);
	if (mii->mdio_read(mii->dev, mii->phy_id, MII_BMSR) & BMSR_LSTATUS)
		return 1;
	return 0;
}

int _kc_mii_nway_restart (struct mii_if_info *mii)
{
	int bmcr;
	int r = -EINVAL;

	/* if autoneg is off, it's an error */
	bmcr = mii->mdio_read(mii->dev, mii->phy_id, MII_BMCR);

	if (bmcr & BMCR_ANENABLE) {
		bmcr |= BMCR_ANRESTART;
		mii->mdio_write(mii->dev, mii->phy_id, MII_BMCR, bmcr);
		r = 0;
	}

	return r;
}

void _kc_mii_check_link (struct mii_if_info *mii)
{
	int cur_link = mii_link_ok(mii);
	int prev_link = netif_carrier_ok(mii->dev);

	if (cur_link && !prev_link)
		netif_carrier_on(mii->dev);
	else if (prev_link && !cur_link)
		netif_carrier_off(mii->dev);
}

int _kc_generic_mii_ioctl(struct mii_if_info *mii_if,
                          struct mii_ioctl_data *mii_data, int cmd,
                          unsigned int *duplex_chg_out)
{
	int rc = 0;
	unsigned int duplex_changed = 0;

	if (duplex_chg_out)
		*duplex_chg_out = 0;

	mii_data->phy_id &= mii_if->phy_id_mask;
	mii_data->reg_num &= mii_if->reg_num_mask;

	switch(cmd) {
	case SIOCDEVPRIVATE:	/* binary compat, remove in 2.5 */
	case SIOCGMIIPHY:
		mii_data->phy_id = mii_if->phy_id;
		/* fall through */

	case SIOCDEVPRIVATE + 1:/* binary compat, remove in 2.5 */
	case SIOCGMIIREG:
		mii_data->val_out =
			mii_if->mdio_read(mii_if->dev, mii_data->phy_id,
					  mii_data->reg_num);
		break;

	case SIOCDEVPRIVATE + 2:/* binary compat, remove in 2.5 */
	case SIOCSMIIREG: {
		u16 val = mii_data->val_in;

		if (!capable(CAP_NET_ADMIN))
			return -EPERM;

		if (mii_data->phy_id == mii_if->phy_id) {
			switch(mii_data->reg_num) {
			case MII_BMCR: {
				unsigned int new_duplex = 0;
				if (val & (BMCR_RESET|BMCR_ANENABLE))
					mii_if->force_media = 0;
				else
					mii_if->force_media = 1;
				if (mii_if->force_media &&
				    (val & BMCR_FULLDPLX))
					new_duplex = 1;
				if (mii_if->full_duplex != new_duplex) {
					duplex_changed = 1;
					mii_if->full_duplex = new_duplex;
				}
				break;
			}
			case MII_ADVERTISE:
				mii_if->advertising = val;
				break;
			default:
				/* do nothing */
				break;
			}
		}

		mii_if->mdio_write(mii_if->dev, mii_data->phy_id,
				   mii_data->reg_num, val);
		break;
	}

	default:
		rc = -EOPNOTSUPP;
		break;
	}

	if ((rc == 0) && (duplex_chg_out) && (duplex_changed))
		*duplex_chg_out = 1;

	return rc;
}