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freebsd-nq/sys/dev/mii/e1000phy.c
Marcel Moolenaar 62d76917b8 Introduce a procedural interface to the ifnet structure. The new 
interface allows the ifnet structure to be defined as an opaque
type in NIC drivers.  This then allows the ifnet structure to be
changed without a need to change or recompile NIC drivers.

Put differently, NIC drivers can be written and compiled once and
be used with different network stack implementations, provided of
course that those network stack implementations have an API and
ABI compatible interface.

This commit introduces the 'if_t' type to replace 'struct ifnet *'
as the type of a network interface. The 'if_t' type is defined as
'void *' to enable the compiler to perform type conversion to
'struct ifnet *' and vice versa where needed and without warnings.
The functions that implement the API are the only functions that
need to have an explicit cast.

The MII code has been converted to use the driver API to avoid
unnecessary code churn. Code churn comes from having to work with
both converted and unconverted drivers in correlation with having
callback functions that take an interface. By converting the MII
code first, the callback functions can be defined so that the
compiler will perform the typecasts automatically.

As soon as all drivers have been converted, the if_t type can be
redefined as needed and the API functions can be fix to not need
an explicit cast.

The immediate benefactors of this change are:
1.  Juniper Networks - The network stack implementation in Junos
    is entirely different from FreeBSD's one and this change
    allows Juniper to build "stock" NIC drivers that can be used
    in combination with both the FreeBSD and Junos stacks.
2.  FreeBSD - This change opens the door towards changing ifnet
    and implementing new features and optimizations in the network
    stack without it requiring a change in the many NIC drivers
    FreeBSD has.

Submitted by:	Anuranjan Shukla <anshukla@juniper.net>
Reviewed by:	glebius@
Obtained from:	Juniper Networks, Inc.
2014-06-02 17:54:39 +00:00

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/*-
* Principal Author: Parag Patel
* Copyright (c) 2001
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Additional Copyright (c) 2001 by Traakan Software under same licence.
* Secondary Author: Matthew Jacob
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* driver for the Marvell 88E1000 series external 1000/100/10-BT PHY.
*/
/*
* Support added for the Marvell 88E1011 (Alaska) 1000/100/10baseTX and
* 1000baseSX PHY.
* Nathan Binkert <nate@openbsd.org>
* Jung-uk Kim <jkim@niksun.com>
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/socket.h>
#include <sys/bus.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_media.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include "miidevs.h"
#include <dev/mii/e1000phyreg.h>
#include "miibus_if.h"
static int e1000phy_probe(device_t);
static int e1000phy_attach(device_t);
static device_method_t e1000phy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, e1000phy_probe),
DEVMETHOD(device_attach, e1000phy_attach),
DEVMETHOD(device_detach, mii_phy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD_END
};
static devclass_t e1000phy_devclass;
static driver_t e1000phy_driver = {
"e1000phy",
e1000phy_methods,
sizeof(struct mii_softc)
};
DRIVER_MODULE(e1000phy, miibus, e1000phy_driver, e1000phy_devclass, 0, 0);
static int e1000phy_service(struct mii_softc *, struct mii_data *, int);
static void e1000phy_status(struct mii_softc *);
static void e1000phy_reset(struct mii_softc *);
static int e1000phy_mii_phy_auto(struct mii_softc *, int);
static const struct mii_phydesc e1000phys[] = {
MII_PHY_DESC(MARVELL, E1000),
MII_PHY_DESC(MARVELL, E1011),
MII_PHY_DESC(MARVELL, E1000_3),
MII_PHY_DESC(MARVELL, E1000_5),
MII_PHY_DESC(MARVELL, E1111),
MII_PHY_DESC(xxMARVELL, E1000),
MII_PHY_DESC(xxMARVELL, E1011),
MII_PHY_DESC(xxMARVELL, E1000_3),
MII_PHY_DESC(xxMARVELL, E1000S),
MII_PHY_DESC(xxMARVELL, E1000_5),
MII_PHY_DESC(xxMARVELL, E1101),
MII_PHY_DESC(xxMARVELL, E3082),
MII_PHY_DESC(xxMARVELL, E1112),
MII_PHY_DESC(xxMARVELL, E1149),
MII_PHY_DESC(xxMARVELL, E1111),
MII_PHY_DESC(xxMARVELL, E1116),
MII_PHY_DESC(xxMARVELL, E1116R),
MII_PHY_DESC(xxMARVELL, E1116R_29),
MII_PHY_DESC(xxMARVELL, E1118),
MII_PHY_DESC(xxMARVELL, E1145),
MII_PHY_DESC(xxMARVELL, E1149R),
MII_PHY_DESC(xxMARVELL, E3016),
MII_PHY_DESC(xxMARVELL, PHYG65G),
MII_PHY_END
};
static const struct mii_phy_funcs e1000phy_funcs = {
e1000phy_service,
e1000phy_status,
e1000phy_reset
};
static int
e1000phy_probe(device_t dev)
{
return (mii_phy_dev_probe(dev, e1000phys, BUS_PROBE_DEFAULT));
}
static int
e1000phy_attach(device_t dev)
{
struct mii_softc *sc;
if_t ifp;
sc = device_get_softc(dev);
mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &e1000phy_funcs, 0);
ifp = sc->mii_pdata->mii_ifp;
if (strcmp(if_getdname(ifp), "msk") == 0 &&
(sc->mii_flags & MIIF_MACPRIV0) != 0)
sc->mii_flags |= MIIF_PHYPRIV0;
switch (sc->mii_mpd_model) {
case MII_MODEL_xxMARVELL_E1011:
case MII_MODEL_xxMARVELL_E1112:
if (PHY_READ(sc, E1000_ESSR) & E1000_ESSR_FIBER_LINK)
sc->mii_flags |= MIIF_HAVEFIBER;
break;
case MII_MODEL_xxMARVELL_E1149:
case MII_MODEL_xxMARVELL_E1149R:
/*
* Some 88E1149 PHY's page select is initialized to
* point to other bank instead of copper/fiber bank
* which in turn resulted in wrong registers were
* accessed during PHY operation. It is believed that
* page 0 should be used for copper PHY so reinitialize
* E1000_EADR to select default copper PHY. If parent
* device know the type of PHY(either copper or fiber),
* that information should be used to select default
* type of PHY.
*/
PHY_WRITE(sc, E1000_EADR, 0);
break;
}
PHY_RESET(sc);
sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & sc->mii_capmask;
if (sc->mii_capabilities & BMSR_EXTSTAT)
sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
device_printf(dev, " ");
mii_phy_add_media(sc);
printf("\n");
MIIBUS_MEDIAINIT(sc->mii_dev);
return (0);
}
static void
e1000phy_reset(struct mii_softc *sc)
{
uint16_t reg, page;
reg = PHY_READ(sc, E1000_SCR);
if ((sc->mii_flags & MIIF_HAVEFIBER) != 0) {
reg &= ~E1000_SCR_AUTO_X_MODE;
PHY_WRITE(sc, E1000_SCR, reg);
if (sc->mii_mpd_model == MII_MODEL_xxMARVELL_E1112) {
/* Select 1000BASE-X only mode. */
page = PHY_READ(sc, E1000_EADR);
PHY_WRITE(sc, E1000_EADR, 2);
reg = PHY_READ(sc, E1000_SCR);
reg &= ~E1000_SCR_MODE_MASK;
reg |= E1000_SCR_MODE_1000BX;
PHY_WRITE(sc, E1000_SCR, reg);
if ((sc->mii_flags & MIIF_PHYPRIV0) != 0) {
/* Set SIGDET polarity low for SFP module. */
PHY_WRITE(sc, E1000_EADR, 1);
reg = PHY_READ(sc, E1000_SCR);
reg |= E1000_SCR_FIB_SIGDET_POLARITY;
PHY_WRITE(sc, E1000_SCR, reg);
}
PHY_WRITE(sc, E1000_EADR, page);
}
} else {
switch (sc->mii_mpd_model) {
case MII_MODEL_xxMARVELL_E1111:
case MII_MODEL_xxMARVELL_E1112:
case MII_MODEL_xxMARVELL_E1116:
case MII_MODEL_xxMARVELL_E1116R_29:
case MII_MODEL_xxMARVELL_E1118:
case MII_MODEL_xxMARVELL_E1149:
case MII_MODEL_xxMARVELL_E1149R:
case MII_MODEL_xxMARVELL_PHYG65G:
/* Disable energy detect mode. */
reg &= ~E1000_SCR_EN_DETECT_MASK;
reg |= E1000_SCR_AUTO_X_MODE;
if (sc->mii_mpd_model == MII_MODEL_xxMARVELL_E1116 ||
sc->mii_mpd_model == MII_MODEL_xxMARVELL_E1116R_29)
reg &= ~E1000_SCR_POWER_DOWN;
reg |= E1000_SCR_ASSERT_CRS_ON_TX;
break;
case MII_MODEL_xxMARVELL_E3082:
reg |= (E1000_SCR_AUTO_X_MODE >> 1);
reg |= E1000_SCR_ASSERT_CRS_ON_TX;
break;
case MII_MODEL_xxMARVELL_E3016:
reg |= E1000_SCR_AUTO_MDIX;
reg &= ~(E1000_SCR_EN_DETECT |
E1000_SCR_SCRAMBLER_DISABLE);
reg |= E1000_SCR_LPNP;
/* XXX Enable class A driver for Yukon FE+ A0. */
PHY_WRITE(sc, 0x1C, PHY_READ(sc, 0x1C) | 0x0001);
break;
default:
reg &= ~E1000_SCR_AUTO_X_MODE;
reg |= E1000_SCR_ASSERT_CRS_ON_TX;
break;
}
if (sc->mii_mpd_model != MII_MODEL_xxMARVELL_E3016) {
/* Auto correction for reversed cable polarity. */
reg &= ~E1000_SCR_POLARITY_REVERSAL;
}
PHY_WRITE(sc, E1000_SCR, reg);
if (sc->mii_mpd_model == MII_MODEL_xxMARVELL_E1116 ||
sc->mii_mpd_model == MII_MODEL_xxMARVELL_E1116R_29 ||
sc->mii_mpd_model == MII_MODEL_xxMARVELL_E1149 ||
sc->mii_mpd_model == MII_MODEL_xxMARVELL_E1149R) {
PHY_WRITE(sc, E1000_EADR, 2);
reg = PHY_READ(sc, E1000_SCR);
reg |= E1000_SCR_RGMII_POWER_UP;
PHY_WRITE(sc, E1000_SCR, reg);
PHY_WRITE(sc, E1000_EADR, 0);
}
}
switch (sc->mii_mpd_model) {
case MII_MODEL_xxMARVELL_E3082:
case MII_MODEL_xxMARVELL_E1112:
case MII_MODEL_xxMARVELL_E1118:
break;
case MII_MODEL_xxMARVELL_E1116:
case MII_MODEL_xxMARVELL_E1116R_29:
page = PHY_READ(sc, E1000_EADR);
/* Select page 3, LED control register. */
PHY_WRITE(sc, E1000_EADR, 3);
PHY_WRITE(sc, E1000_SCR,
E1000_SCR_LED_LOS(1) | /* Link/Act */
E1000_SCR_LED_INIT(8) | /* 10Mbps */
E1000_SCR_LED_STAT1(7) | /* 100Mbps */
E1000_SCR_LED_STAT0(7)); /* 1000Mbps */
/* Set blink rate. */
PHY_WRITE(sc, E1000_IER, E1000_PULSE_DUR(E1000_PULSE_170MS) |
E1000_BLINK_RATE(E1000_BLINK_84MS));
PHY_WRITE(sc, E1000_EADR, page);
break;
case MII_MODEL_xxMARVELL_E3016:
/* LED2 -> ACT, LED1 -> LINK, LED0 -> SPEED. */
PHY_WRITE(sc, 0x16, 0x0B << 8 | 0x05 << 4 | 0x04);
/* Integrated register calibration workaround. */
PHY_WRITE(sc, 0x1D, 17);
PHY_WRITE(sc, 0x1E, 0x3F60);
break;
default:
/* Force TX_CLK to 25MHz clock. */
reg = PHY_READ(sc, E1000_ESCR);
reg |= E1000_ESCR_TX_CLK_25;
PHY_WRITE(sc, E1000_ESCR, reg);
break;
}
/* Reset the PHY so all changes take effect. */
reg = PHY_READ(sc, E1000_CR);
reg |= E1000_CR_RESET;
PHY_WRITE(sc, E1000_CR, reg);
}
static int
e1000phy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
uint16_t speed, gig;
int reg;
switch (cmd) {
case MII_POLLSTAT:
break;
case MII_MEDIACHG:
if (IFM_SUBTYPE(ife->ifm_media) == IFM_AUTO) {
e1000phy_mii_phy_auto(sc, ife->ifm_media);
break;
}
speed = 0;
switch (IFM_SUBTYPE(ife->ifm_media)) {
case IFM_1000_T:
if ((sc->mii_extcapabilities &
(EXTSR_1000TFDX | EXTSR_1000THDX)) == 0)
return (EINVAL);
speed = E1000_CR_SPEED_1000;
break;
case IFM_1000_SX:
if ((sc->mii_extcapabilities &
(EXTSR_1000XFDX | EXTSR_1000XHDX)) == 0)
return (EINVAL);
speed = E1000_CR_SPEED_1000;
break;
case IFM_100_TX:
speed = E1000_CR_SPEED_100;
break;
case IFM_10_T:
speed = E1000_CR_SPEED_10;
break;
case IFM_NONE:
reg = PHY_READ(sc, E1000_CR);
PHY_WRITE(sc, E1000_CR,
reg | E1000_CR_ISOLATE | E1000_CR_POWER_DOWN);
goto done;
default:
return (EINVAL);
}
if ((ife->ifm_media & IFM_FDX) != 0) {
speed |= E1000_CR_FULL_DUPLEX;
gig = E1000_1GCR_1000T_FD;
} else
gig = E1000_1GCR_1000T;
reg = PHY_READ(sc, E1000_CR);
reg &= ~E1000_CR_AUTO_NEG_ENABLE;
PHY_WRITE(sc, E1000_CR, reg | E1000_CR_RESET);
if (IFM_SUBTYPE(ife->ifm_media) == IFM_1000_T) {
gig |= E1000_1GCR_MS_ENABLE;
if ((ife->ifm_media & IFM_ETH_MASTER) != 0)
gig |= E1000_1GCR_MS_VALUE;
} else if ((sc->mii_extcapabilities &
(EXTSR_1000TFDX | EXTSR_1000THDX)) != 0)
gig = 0;
PHY_WRITE(sc, E1000_1GCR, gig);
PHY_WRITE(sc, E1000_AR, E1000_AR_SELECTOR_FIELD);
PHY_WRITE(sc, E1000_CR, speed | E1000_CR_RESET);
done:
break;
case MII_TICK:
/*
* Only used for autonegotiation.
*/
if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) {
sc->mii_ticks = 0;
break;
}
/*
* check for link.
* Read the status register twice; BMSR_LINK is latch-low.
*/
reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
if (reg & BMSR_LINK) {
sc->mii_ticks = 0;
break;
}
/* Announce link loss right after it happens. */
if (sc->mii_ticks++ == 0)
break;
if (sc->mii_ticks <= sc->mii_anegticks)
break;
sc->mii_ticks = 0;
PHY_RESET(sc);
e1000phy_mii_phy_auto(sc, ife->ifm_media);
break;
}
/* Update the media status. */
PHY_STATUS(sc);
/* Callback if something changed. */
mii_phy_update(sc, cmd);
return (0);
}
static void
e1000phy_status(struct mii_softc *sc)
{
struct mii_data *mii = sc->mii_pdata;
int bmcr, bmsr, ssr;
mii->mii_media_status = IFM_AVALID;
mii->mii_media_active = IFM_ETHER;
bmsr = PHY_READ(sc, E1000_SR) | PHY_READ(sc, E1000_SR);
bmcr = PHY_READ(sc, E1000_CR);
ssr = PHY_READ(sc, E1000_SSR);
if (bmsr & E1000_SR_LINK_STATUS)
mii->mii_media_status |= IFM_ACTIVE;
if (bmcr & E1000_CR_LOOPBACK)
mii->mii_media_active |= IFM_LOOP;
if ((bmcr & E1000_CR_AUTO_NEG_ENABLE) != 0 &&
(ssr & E1000_SSR_SPD_DPLX_RESOLVED) == 0) {
/* Erg, still trying, I guess... */
mii->mii_media_active |= IFM_NONE;
return;
}
if ((sc->mii_flags & MIIF_HAVEFIBER) == 0) {
switch (ssr & E1000_SSR_SPEED) {
case E1000_SSR_1000MBS:
mii->mii_media_active |= IFM_1000_T;
break;
case E1000_SSR_100MBS:
mii->mii_media_active |= IFM_100_TX;
break;
case E1000_SSR_10MBS:
mii->mii_media_active |= IFM_10_T;
break;
default:
mii->mii_media_active |= IFM_NONE;
return;
}
} else {
/*
* Some fiber PHY(88E1112) does not seem to set resolved
* speed so always assume we've got IFM_1000_SX.
*/
mii->mii_media_active |= IFM_1000_SX;
}
if (ssr & E1000_SSR_DUPLEX) {
mii->mii_media_active |= IFM_FDX;
if ((sc->mii_flags & MIIF_HAVEFIBER) == 0)
mii->mii_media_active |= mii_phy_flowstatus(sc);
} else
mii->mii_media_active |= IFM_HDX;
if (IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_T) {
if (((PHY_READ(sc, E1000_1GSR) | PHY_READ(sc, E1000_1GSR)) &
E1000_1GSR_MS_CONFIG_RES) != 0)
mii->mii_media_active |= IFM_ETH_MASTER;
}
}
static int
e1000phy_mii_phy_auto(struct mii_softc *sc, int media)
{
uint16_t reg;
if ((sc->mii_flags & MIIF_HAVEFIBER) == 0) {
reg = PHY_READ(sc, E1000_AR);
reg &= ~(E1000_AR_PAUSE | E1000_AR_ASM_DIR);
reg |= E1000_AR_10T | E1000_AR_10T_FD |
E1000_AR_100TX | E1000_AR_100TX_FD;
if ((media & IFM_FLOW) != 0 ||
(sc->mii_flags & MIIF_FORCEPAUSE) != 0)
reg |= E1000_AR_PAUSE | E1000_AR_ASM_DIR;
PHY_WRITE(sc, E1000_AR, reg | E1000_AR_SELECTOR_FIELD);
} else
PHY_WRITE(sc, E1000_AR, E1000_FA_1000X_FD | E1000_FA_1000X);
if ((sc->mii_extcapabilities & (EXTSR_1000TFDX | EXTSR_1000THDX)) != 0)
PHY_WRITE(sc, E1000_1GCR,
E1000_1GCR_1000T_FD | E1000_1GCR_1000T);
PHY_WRITE(sc, E1000_CR,
E1000_CR_AUTO_NEG_ENABLE | E1000_CR_RESTART_AUTO_NEG);
return (EJUSTRETURN);
}
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