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freebsd-dev/sys/dev/nge/if_nge.c
Marius Strobl 3fcb7a5365 - Remove attempts to implement setting of BMCR_LOOP/MIIF_NOLOOP 
(reporting IFM_LOOP based on BMCR_LOOP is left in place though as
  it might provide useful for debugging). For most mii(4) drivers it
  was unclear whether the PHYs driven by them actually support
  loopback or not. Moreover, typically loopback mode also needs to
  be activated on the MAC, which none of the Ethernet drivers using
  mii(4) implements. Given that loopback media has no real use (and
  obviously hardly had a chance to actually work) besides for driver
  development (which just loopback mode should be sufficient for
  though, i.e one doesn't necessary need support for loopback media)
  support for it is just dropped as both NetBSD and OpenBSD already
  did quite some time ago.
- Let mii_phy_add_media() also announce the support of IFM_NONE.
- Restructure the PHY entry points to use a structure of entry points
  instead of discrete function pointers, and extend this to include
  a "reset" entry point. Make sure any PHY-specific reset routine is
  always used, and provide one for lxtphy(4) which disables MII
  interrupts (as is done for a few other PHYs we have drivers for).
  This includes changing NIC drivers which previously just called the
  generic mii_phy_reset() to now actually call the PHY-specific reset
  routine, which might be crucial in some cases. While at it, the
  redundant checks in these NIC drivers for mii->mii_instance not being
  zero before calling the reset routines were removed because as soon
  as one PHY driver attaches mii->mii_instance is incremented and we
  hardly can end up in their media change callbacks etc if no PHY driver
  has attached as mii_attach() would have failed in that case and not
  attach a miibus(4) instance.
  Consequently, NIC drivers now no longer should call mii_phy_reset()
  directly, so it was removed from EXPORT_SYMS.
- Add a mii_phy_dev_attach() as a companion helper to mii_phy_dev_probe().
  The purpose of that function is to perform the common steps to attach
  a PHY driver instance and to hook it up to the miibus(4) instance and to
  optionally also handle the probing, addition and initialization of the
  supported media. So all a PHY driver without any special requirements
  has to do in its bus attach method is to call mii_phy_dev_attach()
  along with PHY-specific MIIF_* flags, a pointer to its PHY functions
  and the add_media set to one. All PHY drivers were updated to take
  advantage of mii_phy_dev_attach() as appropriate. Along with these
  changes the capability mask was added to the mii_softc structure so
  PHY drivers taking advantage of mii_phy_dev_attach() but still
  handling media on their own do not need to fiddle with the MII attach
  arguments anyway.
- Keep track of the PHY offset in the mii_softc structure. This is done
  for compatibility with NetBSD/OpenBSD.
- Keep track of the PHY's OUI, model and revision in the mii_softc
  structure. Several PHY drivers require this information also after
  attaching and previously had to wrap their own softc around mii_softc.
  NetBSD/OpenBSD also keep track of the model and revision on their
  mii_softc structure. All PHY drivers were updated to take advantage
  as appropriate.
- Convert the mebers of the MII data structure to unsigned where
  appropriate. This is partly inspired by NetBSD/OpenBSD.
- According to IEEE 802.3-2002 the bits actually have to be reversed
  when mapping an OUI to the MII ID registers. All PHY drivers and
  miidevs where changed as necessary. Actually this now again allows to
  largely share miidevs with NetBSD, which fixed this problem already
  9 years ago. Consequently miidevs was synced as far as possible.
- Add MIIF_NOMANPAUSE and mii_phy_flowstatus() calls to drivers that
  weren't explicitly converted to support flow control before. It's
  unclear whether flow control actually works with these but typically
  it should and their net behavior should be more correct with these
  changes in place than without if the MAC driver sets MIIF_DOPAUSE.

Obtained from:	NetBSD (partially)
Reviewed by:	yongari (earlier version), silence on arch@ and net@
2011-05-03 19:51:29 +00:00

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/*-
* Copyright (c) 2001 Wind River Systems
* Copyright (c) 1997, 1998, 1999, 2000, 2001
* Bill Paul <wpaul@bsdi.com>. 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, 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Bill Paul.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* National Semiconductor DP83820/DP83821 gigabit ethernet driver
* for FreeBSD. Datasheets are available from:
*
* http://www.national.com/ds/DP/DP83820.pdf
* http://www.national.com/ds/DP/DP83821.pdf
*
* These chips are used on several low cost gigabit ethernet NICs
* sold by D-Link, Addtron, SMC and Asante. Both parts are
* virtually the same, except the 83820 is a 64-bit/32-bit part,
* while the 83821 is 32-bit only.
*
* Many cards also use National gigE transceivers, such as the
* DP83891, DP83861 and DP83862 gigPHYTER parts. The DP83861 datasheet
* contains a full register description that applies to all of these
* components:
*
* http://www.national.com/ds/DP/DP83861.pdf
*
* Written by Bill Paul <wpaul@bsdi.com>
* BSDi Open Source Solutions
*/
/*
* The NatSemi DP83820 and 83821 controllers are enhanced versions
* of the NatSemi MacPHYTER 10/100 devices. They support 10, 100
* and 1000Mbps speeds with 1000baseX (ten bit interface), MII and GMII
* ports. Other features include 8K TX FIFO and 32K RX FIFO, TCP/IP
* hardware checksum offload (IPv4 only), VLAN tagging and filtering,
* priority TX and RX queues, a 2048 bit multicast hash filter, 4 RX pattern
* matching buffers, one perfect address filter buffer and interrupt
* moderation. The 83820 supports both 64-bit and 32-bit addressing
* and data transfers: the 64-bit support can be toggled on or off
* via software. This affects the size of certain fields in the DMA
* descriptors.
*
* There are two bugs/misfeatures in the 83820/83821 that I have
* discovered so far:
*
* - Receive buffers must be aligned on 64-bit boundaries, which means
* you must resort to copying data in order to fix up the payload
* alignment.
*
* - In order to transmit jumbo frames larger than 8170 bytes, you have
* to turn off transmit checksum offloading, because the chip can't
* compute the checksum on an outgoing frame unless it fits entirely
* within the TX FIFO, which is only 8192 bytes in size. If you have
* TX checksum offload enabled and you transmit attempt to transmit a
* frame larger than 8170 bytes, the transmitter will wedge.
*
* To work around the latter problem, TX checksum offload is disabled
* if the user selects an MTU larger than 8152 (8170 - 18).
*/
#ifdef HAVE_KERNEL_OPTION_HEADERS
#include "opt_device_polling.h"
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/rman.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <net/bpf.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <net/ethernet.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/if_vlan_var.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <machine/bus.h>
#include <dev/nge/if_ngereg.h>
/* "device miibus" required. See GENERIC if you get errors here. */
#include "miibus_if.h"
MODULE_DEPEND(nge, pci, 1, 1, 1);
MODULE_DEPEND(nge, ether, 1, 1, 1);
MODULE_DEPEND(nge, miibus, 1, 1, 1);
#define NGE_CSUM_FEATURES (CSUM_IP | CSUM_TCP | CSUM_UDP)
/*
* Various supported device vendors/types and their names.
*/
static struct nge_type nge_devs[] = {
{ NGE_VENDORID, NGE_DEVICEID,
"National Semiconductor Gigabit Ethernet" },
{ 0, 0, NULL }
};
static int nge_probe(device_t);
static int nge_attach(device_t);
static int nge_detach(device_t);
static int nge_shutdown(device_t);
static int nge_suspend(device_t);
static int nge_resume(device_t);
static __inline void nge_discard_rxbuf(struct nge_softc *, int);
static int nge_newbuf(struct nge_softc *, int);
static int nge_encap(struct nge_softc *, struct mbuf **);
#ifndef __NO_STRICT_ALIGNMENT
static __inline void nge_fixup_rx(struct mbuf *);
#endif
static int nge_rxeof(struct nge_softc *);
static void nge_txeof(struct nge_softc *);
static void nge_intr(void *);
static void nge_tick(void *);
static void nge_stats_update(struct nge_softc *);
static void nge_start(struct ifnet *);
static void nge_start_locked(struct ifnet *);
static int nge_ioctl(struct ifnet *, u_long, caddr_t);
static void nge_init(void *);
static void nge_init_locked(struct nge_softc *);
static int nge_stop_mac(struct nge_softc *);
static void nge_stop(struct nge_softc *);
static void nge_wol(struct nge_softc *);
static void nge_watchdog(struct nge_softc *);
static int nge_mediachange(struct ifnet *);
static void nge_mediastatus(struct ifnet *, struct ifmediareq *);
static void nge_delay(struct nge_softc *);
static void nge_eeprom_idle(struct nge_softc *);
static void nge_eeprom_putbyte(struct nge_softc *, int);
static void nge_eeprom_getword(struct nge_softc *, int, uint16_t *);
static void nge_read_eeprom(struct nge_softc *, caddr_t, int, int);
static void nge_mii_sync(struct nge_softc *);
static void nge_mii_send(struct nge_softc *, uint32_t, int);
static int nge_mii_readreg(struct nge_softc *, struct nge_mii_frame *);
static int nge_mii_writereg(struct nge_softc *, struct nge_mii_frame *);
static int nge_miibus_readreg(device_t, int, int);
static int nge_miibus_writereg(device_t, int, int, int);
static void nge_miibus_statchg(device_t);
static void nge_rxfilter(struct nge_softc *);
static void nge_reset(struct nge_softc *);
static void nge_dmamap_cb(void *, bus_dma_segment_t *, int, int);
static int nge_dma_alloc(struct nge_softc *);
static void nge_dma_free(struct nge_softc *);
static int nge_list_rx_init(struct nge_softc *);
static int nge_list_tx_init(struct nge_softc *);
static void nge_sysctl_node(struct nge_softc *);
static int sysctl_int_range(SYSCTL_HANDLER_ARGS, int, int);
static int sysctl_hw_nge_int_holdoff(SYSCTL_HANDLER_ARGS);
static device_method_t nge_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, nge_probe),
DEVMETHOD(device_attach, nge_attach),
DEVMETHOD(device_detach, nge_detach),
DEVMETHOD(device_shutdown, nge_shutdown),
DEVMETHOD(device_suspend, nge_suspend),
DEVMETHOD(device_resume, nge_resume),
/* bus interface */
DEVMETHOD(bus_print_child, bus_generic_print_child),
DEVMETHOD(bus_driver_added, bus_generic_driver_added),
/* MII interface */
DEVMETHOD(miibus_readreg, nge_miibus_readreg),
DEVMETHOD(miibus_writereg, nge_miibus_writereg),
DEVMETHOD(miibus_statchg, nge_miibus_statchg),
{ NULL, NULL }
};
static driver_t nge_driver = {
"nge",
nge_methods,
sizeof(struct nge_softc)
};
static devclass_t nge_devclass;
DRIVER_MODULE(nge, pci, nge_driver, nge_devclass, 0, 0);
DRIVER_MODULE(miibus, nge, miibus_driver, miibus_devclass, 0, 0);
#define NGE_SETBIT(sc, reg, x) \
CSR_WRITE_4(sc, reg, \
CSR_READ_4(sc, reg) | (x))
#define NGE_CLRBIT(sc, reg, x) \
CSR_WRITE_4(sc, reg, \
CSR_READ_4(sc, reg) & ~(x))
#define SIO_SET(x) \
CSR_WRITE_4(sc, NGE_MEAR, CSR_READ_4(sc, NGE_MEAR) | (x))
#define SIO_CLR(x) \
CSR_WRITE_4(sc, NGE_MEAR, CSR_READ_4(sc, NGE_MEAR) & ~(x))
static void
nge_delay(struct nge_softc *sc)
{
int idx;
for (idx = (300 / 33) + 1; idx > 0; idx--)
CSR_READ_4(sc, NGE_CSR);
}
static void
nge_eeprom_idle(struct nge_softc *sc)
{
int i;
SIO_SET(NGE_MEAR_EE_CSEL);
nge_delay(sc);
SIO_SET(NGE_MEAR_EE_CLK);
nge_delay(sc);
for (i = 0; i < 25; i++) {
SIO_CLR(NGE_MEAR_EE_CLK);
nge_delay(sc);
SIO_SET(NGE_MEAR_EE_CLK);
nge_delay(sc);
}
SIO_CLR(NGE_MEAR_EE_CLK);
nge_delay(sc);
SIO_CLR(NGE_MEAR_EE_CSEL);
nge_delay(sc);
CSR_WRITE_4(sc, NGE_MEAR, 0x00000000);
}
/*
* Send a read command and address to the EEPROM, check for ACK.
*/
static void
nge_eeprom_putbyte(struct nge_softc *sc, int addr)
{
int d, i;
d = addr | NGE_EECMD_READ;
/*
* Feed in each bit and stobe the clock.
*/
for (i = 0x400; i; i >>= 1) {
if (d & i) {
SIO_SET(NGE_MEAR_EE_DIN);
} else {
SIO_CLR(NGE_MEAR_EE_DIN);
}
nge_delay(sc);
SIO_SET(NGE_MEAR_EE_CLK);
nge_delay(sc);
SIO_CLR(NGE_MEAR_EE_CLK);
nge_delay(sc);
}
}
/*
* Read a word of data stored in the EEPROM at address 'addr.'
*/
static void
nge_eeprom_getword(struct nge_softc *sc, int addr, uint16_t *dest)
{
int i;
uint16_t word = 0;
/* Force EEPROM to idle state. */
nge_eeprom_idle(sc);
/* Enter EEPROM access mode. */
nge_delay(sc);
SIO_CLR(NGE_MEAR_EE_CLK);
nge_delay(sc);
SIO_SET(NGE_MEAR_EE_CSEL);
nge_delay(sc);
/*
* Send address of word we want to read.
*/
nge_eeprom_putbyte(sc, addr);
/*
* Start reading bits from EEPROM.
*/
for (i = 0x8000; i; i >>= 1) {
SIO_SET(NGE_MEAR_EE_CLK);
nge_delay(sc);
if (CSR_READ_4(sc, NGE_MEAR) & NGE_MEAR_EE_DOUT)
word |= i;
nge_delay(sc);
SIO_CLR(NGE_MEAR_EE_CLK);
nge_delay(sc);
}
/* Turn off EEPROM access mode. */
nge_eeprom_idle(sc);
*dest = word;
}
/*
* Read a sequence of words from the EEPROM.
*/
static void
nge_read_eeprom(struct nge_softc *sc, caddr_t dest, int off, int cnt)
{
int i;
uint16_t word = 0, *ptr;
for (i = 0; i < cnt; i++) {
nge_eeprom_getword(sc, off + i, &word);
ptr = (uint16_t *)(dest + (i * 2));
*ptr = word;
}
}
/*
* Sync the PHYs by setting data bit and strobing the clock 32 times.
*/
static void
nge_mii_sync(struct nge_softc *sc)
{
int i;
SIO_SET(NGE_MEAR_MII_DIR|NGE_MEAR_MII_DATA);
for (i = 0; i < 32; i++) {
SIO_SET(NGE_MEAR_MII_CLK);
DELAY(1);
SIO_CLR(NGE_MEAR_MII_CLK);
DELAY(1);
}
}
/*
* Clock a series of bits through the MII.
*/
static void
nge_mii_send(struct nge_softc *sc, uint32_t bits, int cnt)
{
int i;
SIO_CLR(NGE_MEAR_MII_CLK);
for (i = (0x1 << (cnt - 1)); i; i >>= 1) {
if (bits & i) {
SIO_SET(NGE_MEAR_MII_DATA);
} else {
SIO_CLR(NGE_MEAR_MII_DATA);
}
DELAY(1);
SIO_CLR(NGE_MEAR_MII_CLK);
DELAY(1);
SIO_SET(NGE_MEAR_MII_CLK);
}
}
/*
* Read an PHY register through the MII.
*/
static int
nge_mii_readreg(struct nge_softc *sc, struct nge_mii_frame *frame)
{
int i, ack;
/*
* Set up frame for RX.
*/
frame->mii_stdelim = NGE_MII_STARTDELIM;
frame->mii_opcode = NGE_MII_READOP;
frame->mii_turnaround = 0;
frame->mii_data = 0;
CSR_WRITE_4(sc, NGE_MEAR, 0);
/*
* Turn on data xmit.
*/
SIO_SET(NGE_MEAR_MII_DIR);
nge_mii_sync(sc);
/*
* Send command/address info.
*/
nge_mii_send(sc, frame->mii_stdelim, 2);
nge_mii_send(sc, frame->mii_opcode, 2);
nge_mii_send(sc, frame->mii_phyaddr, 5);
nge_mii_send(sc, frame->mii_regaddr, 5);
/* Idle bit */
SIO_CLR((NGE_MEAR_MII_CLK|NGE_MEAR_MII_DATA));
DELAY(1);
SIO_SET(NGE_MEAR_MII_CLK);
DELAY(1);
/* Turn off xmit. */
SIO_CLR(NGE_MEAR_MII_DIR);
/* Check for ack */
SIO_CLR(NGE_MEAR_MII_CLK);
DELAY(1);
ack = CSR_READ_4(sc, NGE_MEAR) & NGE_MEAR_MII_DATA;
SIO_SET(NGE_MEAR_MII_CLK);
DELAY(1);
/*
* Now try reading data bits. If the ack failed, we still
* need to clock through 16 cycles to keep the PHY(s) in sync.
*/
if (ack) {
for (i = 0; i < 16; i++) {
SIO_CLR(NGE_MEAR_MII_CLK);
DELAY(1);
SIO_SET(NGE_MEAR_MII_CLK);
DELAY(1);
}
goto fail;
}
for (i = 0x8000; i; i >>= 1) {
SIO_CLR(NGE_MEAR_MII_CLK);
DELAY(1);
if (!ack) {
if (CSR_READ_4(sc, NGE_MEAR) & NGE_MEAR_MII_DATA)
frame->mii_data |= i;
DELAY(1);
}
SIO_SET(NGE_MEAR_MII_CLK);
DELAY(1);
}
fail:
SIO_CLR(NGE_MEAR_MII_CLK);
DELAY(1);
SIO_SET(NGE_MEAR_MII_CLK);
DELAY(1);
if (ack)
return (1);
return (0);
}
/*
* Write to a PHY register through the MII.
*/
static int
nge_mii_writereg(struct nge_softc *sc, struct nge_mii_frame *frame)
{
/*
* Set up frame for TX.
*/
frame->mii_stdelim = NGE_MII_STARTDELIM;
frame->mii_opcode = NGE_MII_WRITEOP;
frame->mii_turnaround = NGE_MII_TURNAROUND;
/*
* Turn on data output.
*/
SIO_SET(NGE_MEAR_MII_DIR);
nge_mii_sync(sc);
nge_mii_send(sc, frame->mii_stdelim, 2);
nge_mii_send(sc, frame->mii_opcode, 2);
nge_mii_send(sc, frame->mii_phyaddr, 5);
nge_mii_send(sc, frame->mii_regaddr, 5);
nge_mii_send(sc, frame->mii_turnaround, 2);
nge_mii_send(sc, frame->mii_data, 16);
/* Idle bit. */
SIO_SET(NGE_MEAR_MII_CLK);
DELAY(1);
SIO_CLR(NGE_MEAR_MII_CLK);
DELAY(1);
/*
* Turn off xmit.
*/
SIO_CLR(NGE_MEAR_MII_DIR);
return (0);
}
static int
nge_miibus_readreg(device_t dev, int phy, int reg)
{
struct nge_softc *sc;
struct nge_mii_frame frame;
int rv;
sc = device_get_softc(dev);
if ((sc->nge_flags & NGE_FLAG_TBI) != 0) {
/* Pretend PHY is at address 0. */
if (phy != 0)
return (0);
switch (reg) {
case MII_BMCR:
reg = NGE_TBI_BMCR;
break;
case MII_BMSR:
/* 83820/83821 has different bit layout for BMSR. */
rv = BMSR_ANEG | BMSR_EXTCAP | BMSR_EXTSTAT;
reg = CSR_READ_4(sc, NGE_TBI_BMSR);
if ((reg & NGE_TBIBMSR_ANEG_DONE) != 0)
rv |= BMSR_ACOMP;
if ((reg & NGE_TBIBMSR_LINKSTAT) != 0)
rv |= BMSR_LINK;
return (rv);
case MII_ANAR:
reg = NGE_TBI_ANAR;
break;
case MII_ANLPAR:
reg = NGE_TBI_ANLPAR;
break;
case MII_ANER:
reg = NGE_TBI_ANER;
break;
case MII_EXTSR:
reg = NGE_TBI_ESR;
break;
case MII_PHYIDR1:
case MII_PHYIDR2:
return (0);
default:
device_printf(sc->nge_dev,
"bad phy register read : %d\n", reg);
return (0);
}
return (CSR_READ_4(sc, reg));
}
bzero((char *)&frame, sizeof(frame));
frame.mii_phyaddr = phy;
frame.mii_regaddr = reg;
nge_mii_readreg(sc, &frame);
return (frame.mii_data);
}
static int
nge_miibus_writereg(device_t dev, int phy, int reg, int data)
{
struct nge_softc *sc;
struct nge_mii_frame frame;
sc = device_get_softc(dev);
if ((sc->nge_flags & NGE_FLAG_TBI) != 0) {
/* Pretend PHY is at address 0. */
if (phy != 0)
return (0);
switch (reg) {
case MII_BMCR:
reg = NGE_TBI_BMCR;
break;
case MII_BMSR:
return (0);
case MII_ANAR:
reg = NGE_TBI_ANAR;
break;
case MII_ANLPAR:
reg = NGE_TBI_ANLPAR;
break;
case MII_ANER:
reg = NGE_TBI_ANER;
break;
case MII_EXTSR:
reg = NGE_TBI_ESR;
break;
case MII_PHYIDR1:
case MII_PHYIDR2:
return (0);
default:
device_printf(sc->nge_dev,
"bad phy register write : %d\n", reg);
return (0);
}
CSR_WRITE_4(sc, reg, data);
return (0);
}
bzero((char *)&frame, sizeof(frame));
frame.mii_phyaddr = phy;
frame.mii_regaddr = reg;
frame.mii_data = data;
nge_mii_writereg(sc, &frame);
return (0);
}
/*
* media status/link state change handler.
*/
static void
nge_miibus_statchg(device_t dev)
{
struct nge_softc *sc;
struct mii_data *mii;
struct ifnet *ifp;
struct nge_txdesc *txd;
uint32_t done, reg, status;
int i;
sc = device_get_softc(dev);
NGE_LOCK_ASSERT(sc);
mii = device_get_softc(sc->nge_miibus);
ifp = sc->nge_ifp;
if (mii == NULL || ifp == NULL ||
(ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
return;
sc->nge_flags &= ~NGE_FLAG_LINK;
if ((mii->mii_media_status & (IFM_AVALID | IFM_ACTIVE)) ==
(IFM_AVALID | IFM_ACTIVE)) {
switch (IFM_SUBTYPE(mii->mii_media_active)) {
case IFM_10_T:
case IFM_100_TX:
case IFM_1000_T:
case IFM_1000_SX:
case IFM_1000_LX:
case IFM_1000_CX:
sc->nge_flags |= NGE_FLAG_LINK;
break;
default:
break;
}
}
/* Stop Tx/Rx MACs. */
if (nge_stop_mac(sc) == ETIMEDOUT)
device_printf(sc->nge_dev,
"%s: unable to stop Tx/Rx MAC\n", __func__);
nge_txeof(sc);
nge_rxeof(sc);
if (sc->nge_head != NULL) {
m_freem(sc->nge_head);
sc->nge_head = sc->nge_tail = NULL;
}
/* Release queued frames. */
for (i = 0; i < NGE_TX_RING_CNT; i++) {
txd = &sc->nge_cdata.nge_txdesc[i];
if (txd->tx_m != NULL) {
bus_dmamap_sync(sc->nge_cdata.nge_tx_tag,
txd->tx_dmamap, BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->nge_cdata.nge_tx_tag,
txd->tx_dmamap);
m_freem(txd->tx_m);
txd->tx_m = NULL;
}
}
/* Program MAC with resolved speed/duplex. */
if ((sc->nge_flags & NGE_FLAG_LINK) != 0) {
if ((IFM_OPTIONS(mii->mii_media_active) & IFM_FDX) != 0) {
NGE_SETBIT(sc, NGE_TX_CFG,
(NGE_TXCFG_IGN_HBEAT | NGE_TXCFG_IGN_CARR));
NGE_SETBIT(sc, NGE_RX_CFG, NGE_RXCFG_RX_FDX);
#ifdef notyet
/* Enable flow-control. */
if ((IFM_OPTIONS(mii->mii_media_active) &
(IFM_ETH_RXPAUSE | IFM_ETH_TXPAUSE)) != 0)
NGE_SETBIT(sc, NGE_PAUSECSR,
NGE_PAUSECSR_PAUSE_ENB);
#endif
} else {
NGE_CLRBIT(sc, NGE_TX_CFG,
(NGE_TXCFG_IGN_HBEAT | NGE_TXCFG_IGN_CARR));
NGE_CLRBIT(sc, NGE_RX_CFG, NGE_RXCFG_RX_FDX);
NGE_CLRBIT(sc, NGE_PAUSECSR, NGE_PAUSECSR_PAUSE_ENB);
}
/* If we have a 1000Mbps link, set the mode_1000 bit. */
reg = CSR_READ_4(sc, NGE_CFG);
switch (IFM_SUBTYPE(mii->mii_media_active)) {
case IFM_1000_SX:
case IFM_1000_LX:
case IFM_1000_CX:
case IFM_1000_T:
reg |= NGE_CFG_MODE_1000;
break;
default:
reg &= ~NGE_CFG_MODE_1000;
break;
}
CSR_WRITE_4(sc, NGE_CFG, reg);
/* Reset Tx/Rx MAC. */
reg = CSR_READ_4(sc, NGE_CSR);
reg |= NGE_CSR_TX_RESET | NGE_CSR_RX_RESET;
CSR_WRITE_4(sc, NGE_CSR, reg);
/* Check the completion of reset. */
done = 0;
for (i = 0; i < NGE_TIMEOUT; i++) {
DELAY(1);
status = CSR_READ_4(sc, NGE_ISR);
if ((status & NGE_ISR_RX_RESET_DONE) != 0)
done |= NGE_ISR_RX_RESET_DONE;
if ((status & NGE_ISR_TX_RESET_DONE) != 0)
done |= NGE_ISR_TX_RESET_DONE;
if (done ==
(NGE_ISR_TX_RESET_DONE | NGE_ISR_RX_RESET_DONE))
break;
}
if (i == NGE_TIMEOUT)
device_printf(sc->nge_dev,
"%s: unable to reset Tx/Rx MAC\n", __func__);
/* Reuse Rx buffer and reset consumer pointer. */
sc->nge_cdata.nge_rx_cons = 0;
/*
* It seems that resetting Rx/Tx MAC results in
* resetting Tx/Rx descriptor pointer registers such
* that reloading Tx/Rx lists address are needed.
*/
CSR_WRITE_4(sc, NGE_RX_LISTPTR_HI,
NGE_ADDR_HI(sc->nge_rdata.nge_rx_ring_paddr));
CSR_WRITE_4(sc, NGE_RX_LISTPTR_LO,
NGE_ADDR_LO(sc->nge_rdata.nge_rx_ring_paddr));
CSR_WRITE_4(sc, NGE_TX_LISTPTR_HI,
NGE_ADDR_HI(sc->nge_rdata.nge_tx_ring_paddr));
CSR_WRITE_4(sc, NGE_TX_LISTPTR_LO,
NGE_ADDR_LO(sc->nge_rdata.nge_tx_ring_paddr));
/* Reinitialize Tx buffers. */
nge_list_tx_init(sc);
/* Restart Rx MAC. */
reg = CSR_READ_4(sc, NGE_CSR);
reg |= NGE_CSR_RX_ENABLE;
CSR_WRITE_4(sc, NGE_CSR, reg);
for (i = 0; i < NGE_TIMEOUT; i++) {
if ((CSR_READ_4(sc, NGE_CSR) & NGE_CSR_RX_ENABLE) != 0)
break;
DELAY(1);
}
if (i == NGE_TIMEOUT)
device_printf(sc->nge_dev,
"%s: unable to restart Rx MAC\n", __func__);
}
/* Data LED off for TBI mode */
if ((sc->nge_flags & NGE_FLAG_TBI) != 0)
CSR_WRITE_4(sc, NGE_GPIO,
CSR_READ_4(sc, NGE_GPIO) & ~NGE_GPIO_GP3_OUT);
}
static void
nge_rxfilter(struct nge_softc *sc)
{
struct ifnet *ifp;
struct ifmultiaddr *ifma;
uint32_t h, i, rxfilt;
int bit, index;
NGE_LOCK_ASSERT(sc);
ifp = sc->nge_ifp;
/* Make sure to stop Rx filtering. */
rxfilt = CSR_READ_4(sc, NGE_RXFILT_CTL);
rxfilt &= ~NGE_RXFILTCTL_ENABLE;
CSR_WRITE_4(sc, NGE_RXFILT_CTL, rxfilt);
CSR_BARRIER_WRITE_4(sc, NGE_RXFILT_CTL);
rxfilt &= ~(NGE_RXFILTCTL_ALLMULTI | NGE_RXFILTCTL_ALLPHYS);
rxfilt &= ~NGE_RXFILTCTL_BROAD;
/*
* We don't want to use the hash table for matching unicast
* addresses.
*/
rxfilt &= ~(NGE_RXFILTCTL_MCHASH | NGE_RXFILTCTL_UCHASH);
/*
* For the NatSemi chip, we have to explicitly enable the
* reception of ARP frames, as well as turn on the 'perfect
* match' filter where we store the station address, otherwise
* we won't receive unicasts meant for this host.
*/
rxfilt |= NGE_RXFILTCTL_ARP | NGE_RXFILTCTL_PERFECT;
/*
* Set the capture broadcast bit to capture broadcast frames.
*/
if ((ifp->if_flags & IFF_BROADCAST) != 0)
rxfilt |= NGE_RXFILTCTL_BROAD;
if ((ifp->if_flags & IFF_PROMISC) != 0 ||
(ifp->if_flags & IFF_ALLMULTI) != 0) {
rxfilt |= NGE_RXFILTCTL_ALLMULTI;
if ((ifp->if_flags & IFF_PROMISC) != 0)
rxfilt |= NGE_RXFILTCTL_ALLPHYS;
goto done;
}
/*
* We have to explicitly enable the multicast hash table
* on the NatSemi chip if we want to use it, which we do.
*/
rxfilt |= NGE_RXFILTCTL_MCHASH;
/* first, zot all the existing hash bits */
for (i = 0; i < NGE_MCAST_FILTER_LEN; i += 2) {
CSR_WRITE_4(sc, NGE_RXFILT_CTL, NGE_FILTADDR_MCAST_LO + i);
CSR_WRITE_4(sc, NGE_RXFILT_DATA, 0);
}
/*
* From the 11 bits returned by the crc routine, the top 7
* bits represent the 16-bit word in the mcast hash table
* that needs to be updated, and the lower 4 bits represent
* which bit within that byte needs to be set.
*/
if_maddr_rlock(ifp);
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
if (ifma->ifma_addr->sa_family != AF_LINK)
continue;
h = ether_crc32_be(LLADDR((struct sockaddr_dl *)
ifma->ifma_addr), ETHER_ADDR_LEN) >> 21;
index = (h >> 4) & 0x7F;
bit = h & 0xF;
CSR_WRITE_4(sc, NGE_RXFILT_CTL,
NGE_FILTADDR_MCAST_LO + (index * 2));
NGE_SETBIT(sc, NGE_RXFILT_DATA, (1 << bit));
}
if_maddr_runlock(ifp);
done:
CSR_WRITE_4(sc, NGE_RXFILT_CTL, rxfilt);
/* Turn the receive filter on. */
rxfilt |= NGE_RXFILTCTL_ENABLE;
CSR_WRITE_4(sc, NGE_RXFILT_CTL, rxfilt);
CSR_BARRIER_WRITE_4(sc, NGE_RXFILT_CTL);
}
static void
nge_reset(struct nge_softc *sc)
{
uint32_t v;
int i;
NGE_SETBIT(sc, NGE_CSR, NGE_CSR_RESET);
for (i = 0; i < NGE_TIMEOUT; i++) {
if (!(CSR_READ_4(sc, NGE_CSR) & NGE_CSR_RESET))
break;
DELAY(1);
}
if (i == NGE_TIMEOUT)
device_printf(sc->nge_dev, "reset never completed\n");
/* Wait a little while for the chip to get its brains in order. */
DELAY(1000);
/*
* If this is a NetSemi chip, make sure to clear
* PME mode.
*/
CSR_WRITE_4(sc, NGE_CLKRUN, NGE_CLKRUN_PMESTS);
CSR_WRITE_4(sc, NGE_CLKRUN, 0);
/* Clear WOL events which may interfere normal Rx filter opertaion. */
CSR_WRITE_4(sc, NGE_WOLCSR, 0);
/*
* Only DP83820 supports 64bits addressing/data transfers and
* 64bit addressing requires different descriptor structures.
* To make it simple, disable 64bit addressing/data transfers.
*/
v = CSR_READ_4(sc, NGE_CFG);
v &= ~(NGE_CFG_64BIT_ADDR_ENB | NGE_CFG_64BIT_DATA_ENB);
CSR_WRITE_4(sc, NGE_CFG, v);
}
/*
* Probe for a NatSemi chip. Check the PCI vendor and device
* IDs against our list and return a device name if we find a match.
*/
static int
nge_probe(device_t dev)
{
struct nge_type *t;
t = nge_devs;
while (t->nge_name != NULL) {
if ((pci_get_vendor(dev) == t->nge_vid) &&
(pci_get_device(dev) == t->nge_did)) {
device_set_desc(dev, t->nge_name);
return (BUS_PROBE_DEFAULT);
}
t++;
}
return (ENXIO);
}
/*
* Attach the interface. Allocate softc structures, do ifmedia
* setup and ethernet/BPF attach.
*/
static int
nge_attach(device_t dev)
{
uint8_t eaddr[ETHER_ADDR_LEN];
uint16_t ea[ETHER_ADDR_LEN/2], ea_temp, reg;
struct nge_softc *sc;
struct ifnet *ifp;
int error, i, rid;
error = 0;
sc = device_get_softc(dev);
sc->nge_dev = dev;
NGE_LOCK_INIT(sc, device_get_nameunit(dev));
callout_init_mtx(&sc->nge_stat_ch, &sc->nge_mtx, 0);
/*
* Map control/status registers.
*/
pci_enable_busmaster(dev);
#ifdef NGE_USEIOSPACE
sc->nge_res_type = SYS_RES_IOPORT;
sc->nge_res_id = PCIR_BAR(0);
#else
sc->nge_res_type = SYS_RES_MEMORY;
sc->nge_res_id = PCIR_BAR(1);
#endif
sc->nge_res = bus_alloc_resource_any(dev, sc->nge_res_type,
&sc->nge_res_id, RF_ACTIVE);
if (sc->nge_res == NULL) {
if (sc->nge_res_type == SYS_RES_MEMORY) {
sc->nge_res_type = SYS_RES_IOPORT;
sc->nge_res_id = PCIR_BAR(0);
} else {
sc->nge_res_type = SYS_RES_MEMORY;
sc->nge_res_id = PCIR_BAR(1);
}
sc->nge_res = bus_alloc_resource_any(dev, sc->nge_res_type,
&sc->nge_res_id, RF_ACTIVE);
if (sc->nge_res == NULL) {
device_printf(dev, "couldn't allocate %s resources\n",
sc->nge_res_type == SYS_RES_MEMORY ? "memory" :
"I/O");
NGE_LOCK_DESTROY(sc);
return (ENXIO);
}
}
/* Allocate interrupt */
rid = 0;
sc->nge_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_SHAREABLE | RF_ACTIVE);
if (sc->nge_irq == NULL) {
device_printf(dev, "couldn't map interrupt\n");
error = ENXIO;
goto fail;
}
/* Enable MWI. */
reg = pci_read_config(dev, PCIR_COMMAND, 2);
reg |= PCIM_CMD_MWRICEN;
pci_write_config(dev, PCIR_COMMAND, reg, 2);
/* Reset the adapter. */
nge_reset(sc);
/*
* Get station address from the EEPROM.
*/
nge_read_eeprom(sc, (caddr_t)ea, NGE_EE_NODEADDR, 3);
for (i = 0; i < ETHER_ADDR_LEN / 2; i++)
ea[i] = le16toh(ea[i]);
ea_temp = ea[0];
ea[0] = ea[2];
ea[2] = ea_temp;
bcopy(ea, eaddr, sizeof(eaddr));
if (nge_dma_alloc(sc) != 0) {
error = ENXIO;
goto fail;
}
nge_sysctl_node(sc);
ifp = sc->nge_ifp = if_alloc(IFT_ETHER);
if (ifp == NULL) {
device_printf(dev, "can not allocate ifnet structure\n");
error = ENOSPC;
goto fail;
}
ifp->if_softc = sc;
if_initname(ifp, device_get_name(dev), device_get_unit(dev));
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_ioctl = nge_ioctl;
ifp->if_start = nge_start;
ifp->if_init = nge_init;
ifp->if_snd.ifq_drv_maxlen = NGE_TX_RING_CNT - 1;
IFQ_SET_MAXLEN(&ifp->if_snd, ifp->if_snd.ifq_drv_maxlen);
IFQ_SET_READY(&ifp->if_snd);
ifp->if_hwassist = NGE_CSUM_FEATURES;
ifp->if_capabilities = IFCAP_HWCSUM;
/*
* It seems that some hardwares doesn't provide 3.3V auxiliary
* supply(3VAUX) to drive PME such that checking PCI power
* management capability is necessary.
*/
if (pci_find_cap(sc->nge_dev, PCIY_PMG, &i) == 0)
ifp->if_capabilities |= IFCAP_WOL;
ifp->if_capenable = ifp->if_capabilities;
if ((CSR_READ_4(sc, NGE_CFG) & NGE_CFG_TBI_EN) != 0) {
sc->nge_flags |= NGE_FLAG_TBI;
device_printf(dev, "Using TBI\n");
/* Configure GPIO. */
CSR_WRITE_4(sc, NGE_GPIO, CSR_READ_4(sc, NGE_GPIO)
| NGE_GPIO_GP4_OUT
| NGE_GPIO_GP1_OUTENB | NGE_GPIO_GP2_OUTENB
| NGE_GPIO_GP3_OUTENB
| NGE_GPIO_GP3_IN | NGE_GPIO_GP4_IN);
}
/*
* Do MII setup.
*/
error = mii_attach(dev, &sc->nge_miibus, ifp, nge_mediachange,
nge_mediastatus, BMSR_DEFCAPMASK, MII_PHY_ANY, MII_OFFSET_ANY, 0);
if (error != 0) {
device_printf(dev, "attaching PHYs failed\n");
goto fail;
}
/*
* Call MI attach routine.
*/
ether_ifattach(ifp, eaddr);
/* VLAN capability setup. */
ifp->if_capabilities |= IFCAP_VLAN_MTU | IFCAP_VLAN_HWTAGGING;
ifp->if_capabilities |= IFCAP_VLAN_HWCSUM;
ifp->if_capenable = ifp->if_capabilities;
#ifdef DEVICE_POLLING
ifp->if_capabilities |= IFCAP_POLLING;
#endif
/*
* Tell the upper layer(s) we support long frames.
* Must appear after the call to ether_ifattach() because
* ether_ifattach() sets ifi_hdrlen to the default value.
*/
ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header);
/*
* Hookup IRQ last.
*/
error = bus_setup_intr(dev, sc->nge_irq, INTR_TYPE_NET | INTR_MPSAFE,
NULL, nge_intr, sc, &sc->nge_intrhand);
if (error) {
device_printf(dev, "couldn't set up irq\n");
goto fail;
}
fail:
if (error != 0)
nge_detach(dev);
return (error);
}
static int
nge_detach(device_t dev)
{
struct nge_softc *sc;
struct ifnet *ifp;
sc = device_get_softc(dev);
ifp = sc->nge_ifp;
#ifdef DEVICE_POLLING
if (ifp != NULL && ifp->if_capenable & IFCAP_POLLING)
ether_poll_deregister(ifp);
#endif
if (device_is_attached(dev)) {
NGE_LOCK(sc);
sc->nge_flags |= NGE_FLAG_DETACH;
nge_stop(sc);
NGE_UNLOCK(sc);
callout_drain(&sc->nge_stat_ch);
if (ifp != NULL)
ether_ifdetach(ifp);
}
if (sc->nge_miibus != NULL) {
device_delete_child(dev, sc->nge_miibus);
sc->nge_miibus = NULL;
}
bus_generic_detach(dev);
if (sc->nge_intrhand != NULL)
bus_teardown_intr(dev, sc->nge_irq, sc->nge_intrhand);
if (sc->nge_irq != NULL)
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->nge_irq);
if (sc->nge_res != NULL)
bus_release_resource(dev, sc->nge_res_type, sc->nge_res_id,
sc->nge_res);
nge_dma_free(sc);
if (ifp != NULL)
if_free(ifp);
NGE_LOCK_DESTROY(sc);
return (0);
}
struct nge_dmamap_arg {
bus_addr_t nge_busaddr;
};
static void
nge_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
struct nge_dmamap_arg *ctx;
if (error != 0)
return;
ctx = arg;
ctx->nge_busaddr = segs[0].ds_addr;
}
static int
nge_dma_alloc(struct nge_softc *sc)
{
struct nge_dmamap_arg ctx;
struct nge_txdesc *txd;
struct nge_rxdesc *rxd;
int error, i;
/* Create parent DMA tag. */
error = bus_dma_tag_create(
bus_get_dma_tag(sc->nge_dev), /* parent */
1, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
BUS_SPACE_MAXSIZE_32BIT, /* maxsize */
0, /* nsegments */
BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->nge_cdata.nge_parent_tag);
if (error != 0) {
device_printf(sc->nge_dev, "failed to create parent DMA tag\n");
goto fail;
}
/* Create tag for Tx ring. */
error = bus_dma_tag_create(sc->nge_cdata.nge_parent_tag,/* parent */
NGE_RING_ALIGN, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
NGE_TX_RING_SIZE, /* maxsize */
1, /* nsegments */
NGE_TX_RING_SIZE, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->nge_cdata.nge_tx_ring_tag);
if (error != 0) {
device_printf(sc->nge_dev, "failed to create Tx ring DMA tag\n");
goto fail;
}
/* Create tag for Rx ring. */
error = bus_dma_tag_create(sc->nge_cdata.nge_parent_tag,/* parent */
NGE_RING_ALIGN, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
NGE_RX_RING_SIZE, /* maxsize */
1, /* nsegments */
NGE_RX_RING_SIZE, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->nge_cdata.nge_rx_ring_tag);
if (error != 0) {
device_printf(sc->nge_dev,
"failed to create Rx ring DMA tag\n");
goto fail;
}
/* Create tag for Tx buffers. */
error = bus_dma_tag_create(sc->nge_cdata.nge_parent_tag,/* parent */
1, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
MCLBYTES * NGE_MAXTXSEGS, /* maxsize */
NGE_MAXTXSEGS, /* nsegments */
MCLBYTES, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->nge_cdata.nge_tx_tag);
if (error != 0) {
device_printf(sc->nge_dev, "failed to create Tx DMA tag\n");
goto fail;
}
/* Create tag for Rx buffers. */
error = bus_dma_tag_create(sc->nge_cdata.nge_parent_tag,/* parent */
NGE_RX_ALIGN, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
MCLBYTES, /* maxsize */
1, /* nsegments */
MCLBYTES, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->nge_cdata.nge_rx_tag);
if (error != 0) {
device_printf(sc->nge_dev, "failed to create Rx DMA tag\n");
goto fail;
}
/* Allocate DMA'able memory and load the DMA map for Tx ring. */
error = bus_dmamem_alloc(sc->nge_cdata.nge_tx_ring_tag,
(void **)&sc->nge_rdata.nge_tx_ring, BUS_DMA_WAITOK |
BUS_DMA_COHERENT | BUS_DMA_ZERO, &sc->nge_cdata.nge_tx_ring_map);
if (error != 0) {
device_printf(sc->nge_dev,
"failed to allocate DMA'able memory for Tx ring\n");
goto fail;
}
ctx.nge_busaddr = 0;
error = bus_dmamap_load(sc->nge_cdata.nge_tx_ring_tag,
sc->nge_cdata.nge_tx_ring_map, sc->nge_rdata.nge_tx_ring,
NGE_TX_RING_SIZE, nge_dmamap_cb, &ctx, 0);
if (error != 0 || ctx.nge_busaddr == 0) {
device_printf(sc->nge_dev,
"failed to load DMA'able memory for Tx ring\n");
goto fail;
}
sc->nge_rdata.nge_tx_ring_paddr = ctx.nge_busaddr;
/* Allocate DMA'able memory and load the DMA map for Rx ring. */
error = bus_dmamem_alloc(sc->nge_cdata.nge_rx_ring_tag,
(void **)&sc->nge_rdata.nge_rx_ring, BUS_DMA_WAITOK |
BUS_DMA_COHERENT | BUS_DMA_ZERO, &sc->nge_cdata.nge_rx_ring_map);
if (error != 0) {
device_printf(sc->nge_dev,
"failed to allocate DMA'able memory for Rx ring\n");
goto fail;
}
ctx.nge_busaddr = 0;
error = bus_dmamap_load(sc->nge_cdata.nge_rx_ring_tag,
sc->nge_cdata.nge_rx_ring_map, sc->nge_rdata.nge_rx_ring,
NGE_RX_RING_SIZE, nge_dmamap_cb, &ctx, 0);
if (error != 0 || ctx.nge_busaddr == 0) {
device_printf(sc->nge_dev,
"failed to load DMA'able memory for Rx ring\n");
goto fail;
}
sc->nge_rdata.nge_rx_ring_paddr = ctx.nge_busaddr;
/* Create DMA maps for Tx buffers. */
for (i = 0; i < NGE_TX_RING_CNT; i++) {
txd = &sc->nge_cdata.nge_txdesc[i];
txd->tx_m = NULL;
txd->tx_dmamap = NULL;
error = bus_dmamap_create(sc->nge_cdata.nge_tx_tag, 0,
&txd->tx_dmamap);
if (error != 0) {
device_printf(sc->nge_dev,
"failed to create Tx dmamap\n");
goto fail;
}
}
/* Create DMA maps for Rx buffers. */
if ((error = bus_dmamap_create(sc->nge_cdata.nge_rx_tag, 0,
&sc->nge_cdata.nge_rx_sparemap)) != 0) {
device_printf(sc->nge_dev,
"failed to create spare Rx dmamap\n");
goto fail;
}
for (i = 0; i < NGE_RX_RING_CNT; i++) {
rxd = &sc->nge_cdata.nge_rxdesc[i];
rxd->rx_m = NULL;
rxd->rx_dmamap = NULL;
error = bus_dmamap_create(sc->nge_cdata.nge_rx_tag, 0,
&rxd->rx_dmamap);
if (error != 0) {
device_printf(sc->nge_dev,
"failed to create Rx dmamap\n");
goto fail;
}
}
fail:
return (error);
}
static void
nge_dma_free(struct nge_softc *sc)
{
struct nge_txdesc *txd;
struct nge_rxdesc *rxd;
int i;
/* Tx ring. */
if (sc->nge_cdata.nge_tx_ring_tag) {
if (sc->nge_cdata.nge_tx_ring_map)
bus_dmamap_unload(sc->nge_cdata.nge_tx_ring_tag,
sc->nge_cdata.nge_tx_ring_map);
if (sc->nge_cdata.nge_tx_ring_map &&
sc->nge_rdata.nge_tx_ring)
bus_dmamem_free(sc->nge_cdata.nge_tx_ring_tag,
sc->nge_rdata.nge_tx_ring,
sc->nge_cdata.nge_tx_ring_map);
sc->nge_rdata.nge_tx_ring = NULL;
sc->nge_cdata.nge_tx_ring_map = NULL;
bus_dma_tag_destroy(sc->nge_cdata.nge_tx_ring_tag);
sc->nge_cdata.nge_tx_ring_tag = NULL;
}
/* Rx ring. */
if (sc->nge_cdata.nge_rx_ring_tag) {
if (sc->nge_cdata.nge_rx_ring_map)
bus_dmamap_unload(sc->nge_cdata.nge_rx_ring_tag,
sc->nge_cdata.nge_rx_ring_map);
if (sc->nge_cdata.nge_rx_ring_map &&
sc->nge_rdata.nge_rx_ring)
bus_dmamem_free(sc->nge_cdata.nge_rx_ring_tag,
sc->nge_rdata.nge_rx_ring,
sc->nge_cdata.nge_rx_ring_map);
sc->nge_rdata.nge_rx_ring = NULL;
sc->nge_cdata.nge_rx_ring_map = NULL;
bus_dma_tag_destroy(sc->nge_cdata.nge_rx_ring_tag);
sc->nge_cdata.nge_rx_ring_tag = NULL;
}
/* Tx buffers. */
if (sc->nge_cdata.nge_tx_tag) {
for (i = 0; i < NGE_TX_RING_CNT; i++) {
txd = &sc->nge_cdata.nge_txdesc[i];
if (txd->tx_dmamap) {
bus_dmamap_destroy(sc->nge_cdata.nge_tx_tag,
txd->tx_dmamap);
txd->tx_dmamap = NULL;
}
}
bus_dma_tag_destroy(sc->nge_cdata.nge_tx_tag);
sc->nge_cdata.nge_tx_tag = NULL;
}
/* Rx buffers. */
if (sc->nge_cdata.nge_rx_tag) {
for (i = 0; i < NGE_RX_RING_CNT; i++) {
rxd = &sc->nge_cdata.nge_rxdesc[i];
if (rxd->rx_dmamap) {
bus_dmamap_destroy(sc->nge_cdata.nge_rx_tag,
rxd->rx_dmamap);
rxd->rx_dmamap = NULL;
}
}
if (sc->nge_cdata.nge_rx_sparemap) {
bus_dmamap_destroy(sc->nge_cdata.nge_rx_tag,
sc->nge_cdata.nge_rx_sparemap);
sc->nge_cdata.nge_rx_sparemap = 0;
}
bus_dma_tag_destroy(sc->nge_cdata.nge_rx_tag);
sc->nge_cdata.nge_rx_tag = NULL;
}
if (sc->nge_cdata.nge_parent_tag) {
bus_dma_tag_destroy(sc->nge_cdata.nge_parent_tag);
sc->nge_cdata.nge_parent_tag = NULL;
}
}
/*
* Initialize the transmit descriptors.
*/
static int
nge_list_tx_init(struct nge_softc *sc)
{
struct nge_ring_data *rd;
struct nge_txdesc *txd;
bus_addr_t addr;
int i;
sc->nge_cdata.nge_tx_prod = 0;
sc->nge_cdata.nge_tx_cons = 0;
sc->nge_cdata.nge_tx_cnt = 0;
rd = &sc->nge_rdata;
bzero(rd->nge_tx_ring, sizeof(struct nge_desc) * NGE_TX_RING_CNT);
for (i = 0; i < NGE_TX_RING_CNT; i++) {
if (i == NGE_TX_RING_CNT - 1)
addr = NGE_TX_RING_ADDR(sc, 0);
else
addr = NGE_TX_RING_ADDR(sc, i + 1);
rd->nge_tx_ring[i].nge_next = htole32(NGE_ADDR_LO(addr));
txd = &sc->nge_cdata.nge_txdesc[i];
txd->tx_m = NULL;
}
bus_dmamap_sync(sc->nge_cdata.nge_tx_ring_tag,
sc->nge_cdata.nge_tx_ring_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
return (0);
}
/*
* Initialize the RX descriptors and allocate mbufs for them. Note that
* we arrange the descriptors in a closed ring, so that the last descriptor
* points back to the first.
*/
static int
nge_list_rx_init(struct nge_softc *sc)
{
struct nge_ring_data *rd;
bus_addr_t addr;
int i;
sc->nge_cdata.nge_rx_cons = 0;
sc->nge_head = sc->nge_tail = NULL;
rd = &sc->nge_rdata;
bzero(rd->nge_rx_ring, sizeof(struct nge_desc) * NGE_RX_RING_CNT);
for (i = 0; i < NGE_RX_RING_CNT; i++) {
if (nge_newbuf(sc, i) != 0)
return (ENOBUFS);
if (i == NGE_RX_RING_CNT - 1)
addr = NGE_RX_RING_ADDR(sc, 0);
else
addr = NGE_RX_RING_ADDR(sc, i + 1);
rd->nge_rx_ring[i].nge_next = htole32(NGE_ADDR_LO(addr));
}
bus_dmamap_sync(sc->nge_cdata.nge_rx_ring_tag,
sc->nge_cdata.nge_rx_ring_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
return (0);
}
static __inline void
nge_discard_rxbuf(struct nge_softc *sc, int idx)
{
struct nge_desc *desc;
desc = &sc->nge_rdata.nge_rx_ring[idx];
desc->nge_cmdsts = htole32(MCLBYTES - sizeof(uint64_t));
desc->nge_extsts = 0;
}
/*
* Initialize an RX descriptor and attach an MBUF cluster.
*/
static int
nge_newbuf(struct nge_softc *sc, int idx)
{
struct nge_desc *desc;
struct nge_rxdesc *rxd;
struct mbuf *m;
bus_dma_segment_t segs[1];
bus_dmamap_t map;
int nsegs;
m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
if (m == NULL)
return (ENOBUFS);
m->m_len = m->m_pkthdr.len = MCLBYTES;
m_adj(m, sizeof(uint64_t));
if (bus_dmamap_load_mbuf_sg(sc->nge_cdata.nge_rx_tag,
sc->nge_cdata.nge_rx_sparemap, m, segs, &nsegs, 0) != 0) {
m_freem(m);
return (ENOBUFS);
}
KASSERT(nsegs == 1, ("%s: %d segments returned!", __func__, nsegs));
rxd = &sc->nge_cdata.nge_rxdesc[idx];
if (rxd->rx_m != NULL) {
bus_dmamap_sync(sc->nge_cdata.nge_rx_tag, rxd->rx_dmamap,
BUS_DMASYNC_POSTREAD);
bus_dmamap_unload(sc->nge_cdata.nge_rx_tag, rxd->rx_dmamap);
}
map = rxd->rx_dmamap;
rxd->rx_dmamap = sc->nge_cdata.nge_rx_sparemap;
sc->nge_cdata.nge_rx_sparemap = map;
bus_dmamap_sync(sc->nge_cdata.nge_rx_tag, rxd->rx_dmamap,
BUS_DMASYNC_PREREAD);
rxd->rx_m = m;
desc = &sc->nge_rdata.nge_rx_ring[idx];
desc->nge_ptr = htole32(NGE_ADDR_LO(segs[0].ds_addr));
desc->nge_cmdsts = htole32(segs[0].ds_len);
desc->nge_extsts = 0;
return (0);
}
#ifndef __NO_STRICT_ALIGNMENT
static __inline void
nge_fixup_rx(struct mbuf *m)
{
int i;
uint16_t *src, *dst;
src = mtod(m, uint16_t *);
dst = src - 1;
for (i = 0; i < (m->m_len / sizeof(uint16_t) + 1); i++)
*dst++ = *src++;
m->m_data -= ETHER_ALIGN;
}
#endif
/*
* A frame has been uploaded: pass the resulting mbuf chain up to
* the higher level protocols.
*/
static int
nge_rxeof(struct nge_softc *sc)
{
struct mbuf *m;
struct ifnet *ifp;
struct nge_desc *cur_rx;
struct nge_rxdesc *rxd;
int cons, prog, rx_npkts, total_len;
uint32_t cmdsts, extsts;
NGE_LOCK_ASSERT(sc);
ifp = sc->nge_ifp;
cons = sc->nge_cdata.nge_rx_cons;
rx_npkts = 0;
bus_dmamap_sync(sc->nge_cdata.nge_rx_ring_tag,
sc->nge_cdata.nge_rx_ring_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
for (prog = 0; prog < NGE_RX_RING_CNT &&
(ifp->if_drv_flags & IFF_DRV_RUNNING) != 0;
NGE_INC(cons, NGE_RX_RING_CNT)) {
#ifdef DEVICE_POLLING
if (ifp->if_capenable & IFCAP_POLLING) {
if (sc->rxcycles <= 0)
break;
sc->rxcycles--;
}
#endif
cur_rx = &sc->nge_rdata.nge_rx_ring[cons];
cmdsts = le32toh(cur_rx->nge_cmdsts);
extsts = le32toh(cur_rx->nge_extsts);
if ((cmdsts & NGE_CMDSTS_OWN) == 0)
break;
prog++;
rxd = &sc->nge_cdata.nge_rxdesc[cons];
m = rxd->rx_m;
total_len = cmdsts & NGE_CMDSTS_BUFLEN;
if ((cmdsts & NGE_CMDSTS_MORE) != 0) {
if (nge_newbuf(sc, cons) != 0) {
ifp->if_iqdrops++;
if (sc->nge_head != NULL) {
m_freem(sc->nge_head);
sc->nge_head = sc->nge_tail = NULL;
}
nge_discard_rxbuf(sc, cons);
continue;
}
m->m_len = total_len;
if (sc->nge_head == NULL) {
m->m_pkthdr.len = total_len;
sc->nge_head = sc->nge_tail = m;
} else {
m->m_flags &= ~M_PKTHDR;
sc->nge_head->m_pkthdr.len += total_len;
sc->nge_tail->m_next = m;
sc->nge_tail = m;
}
continue;
}
/*
* If an error occurs, update stats, clear the
* status word and leave the mbuf cluster in place:
* it should simply get re-used next time this descriptor
* comes up in the ring.
*/
if ((cmdsts & NGE_CMDSTS_PKT_OK) == 0) {
if ((cmdsts & NGE_RXSTAT_RUNT) &&
total_len >= (ETHER_MIN_LEN - ETHER_CRC_LEN - 4)) {
/*
* Work-around hardware bug, accept runt frames
* if its length is larger than or equal to 56.
*/
} else {
/*
* Input error counters are updated by hardware.
*/
if (sc->nge_head != NULL) {
m_freem(sc->nge_head);
sc->nge_head = sc->nge_tail = NULL;
}
nge_discard_rxbuf(sc, cons);
continue;
}
}
/* Try conjure up a replacement mbuf. */
if (nge_newbuf(sc, cons) != 0) {
ifp->if_iqdrops++;
if (sc->nge_head != NULL) {
m_freem(sc->nge_head);
sc->nge_head = sc->nge_tail = NULL;
}
nge_discard_rxbuf(sc, cons);
continue;
}
/* Chain received mbufs. */
if (sc->nge_head != NULL) {
m->m_len = total_len;
m->m_flags &= ~M_PKTHDR;
sc->nge_tail->m_next = m;
m = sc->nge_head;
m->m_pkthdr.len += total_len;
sc->nge_head = sc->nge_tail = NULL;
} else
m->m_pkthdr.len = m->m_len = total_len;
/*
* Ok. NatSemi really screwed up here. This is the
* only gigE chip I know of with alignment constraints
* on receive buffers. RX buffers must be 64-bit aligned.
*/
/*
* By popular demand, ignore the alignment problems
* on the non-strict alignment platform. The performance hit
* incurred due to unaligned accesses is much smaller
* than the hit produced by forcing buffer copies all
* the time, especially with jumbo frames. We still
* need to fix up the alignment everywhere else though.
*/
#ifndef __NO_STRICT_ALIGNMENT
nge_fixup_rx(m);
#endif
m->m_pkthdr.rcvif = ifp;
ifp->if_ipackets++;
if ((ifp->if_capenable & IFCAP_RXCSUM) != 0) {
/* Do IP checksum checking. */
if ((extsts & NGE_RXEXTSTS_IPPKT) != 0)
m->m_pkthdr.csum_flags |= CSUM_IP_CHECKED;
if ((extsts & NGE_RXEXTSTS_IPCSUMERR) == 0)
m->m_pkthdr.csum_flags |= CSUM_IP_VALID;
if ((extsts & NGE_RXEXTSTS_TCPPKT &&
!(extsts & NGE_RXEXTSTS_TCPCSUMERR)) ||
(extsts & NGE_RXEXTSTS_UDPPKT &&
!(extsts & NGE_RXEXTSTS_UDPCSUMERR))) {
m->m_pkthdr.csum_flags |=
CSUM_DATA_VALID | CSUM_PSEUDO_HDR;
m->m_pkthdr.csum_data = 0xffff;
}
}
/*
* If we received a packet with a vlan tag, pass it
* to vlan_input() instead of ether_input().
*/
if ((extsts & NGE_RXEXTSTS_VLANPKT) != 0 &&
(ifp->if_capenable & IFCAP_VLAN_HWTAGGING) != 0) {
m->m_pkthdr.ether_vtag =
bswap16(extsts & NGE_RXEXTSTS_VTCI);
m->m_flags |= M_VLANTAG;
}
NGE_UNLOCK(sc);
(*ifp->if_input)(ifp, m);
NGE_LOCK(sc);
rx_npkts++;
}
if (prog > 0) {
sc->nge_cdata.nge_rx_cons = cons;
bus_dmamap_sync(sc->nge_cdata.nge_rx_ring_tag,
sc->nge_cdata.nge_rx_ring_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
}
return (rx_npkts);
}
/*
* A frame was downloaded to the chip. It's safe for us to clean up
* the list buffers.
*/
static void
nge_txeof(struct nge_softc *sc)
{
struct nge_desc *cur_tx;
struct nge_txdesc *txd;
struct ifnet *ifp;
uint32_t cmdsts;
int cons, prod;
NGE_LOCK_ASSERT(sc);
ifp = sc->nge_ifp;
cons = sc->nge_cdata.nge_tx_cons;
prod = sc->nge_cdata.nge_tx_prod;
if (cons == prod)
return;
bus_dmamap_sync(sc->nge_cdata.nge_tx_ring_tag,
sc->nge_cdata.nge_tx_ring_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
/*
* Go through our tx list and free mbufs for those
* frames that have been transmitted.
*/
for (; cons != prod; NGE_INC(cons, NGE_TX_RING_CNT)) {
cur_tx = &sc->nge_rdata.nge_tx_ring[cons];
cmdsts = le32toh(cur_tx->nge_cmdsts);
if ((cmdsts & NGE_CMDSTS_OWN) != 0)
break;
sc->nge_cdata.nge_tx_cnt--;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
if ((cmdsts & NGE_CMDSTS_MORE) != 0)
continue;
txd = &sc->nge_cdata.nge_txdesc[cons];
bus_dmamap_sync(sc->nge_cdata.nge_tx_tag, txd->tx_dmamap,
BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->nge_cdata.nge_tx_tag, txd->tx_dmamap);
if ((cmdsts & NGE_CMDSTS_PKT_OK) == 0) {
ifp->if_oerrors++;
if ((cmdsts & NGE_TXSTAT_EXCESSCOLLS) != 0)
ifp->if_collisions++;
if ((cmdsts & NGE_TXSTAT_OUTOFWINCOLL) != 0)
ifp->if_collisions++;
} else
ifp->if_opackets++;
ifp->if_collisions += (cmdsts & NGE_TXSTAT_COLLCNT) >> 16;
KASSERT(txd->tx_m != NULL, ("%s: freeing NULL mbuf!\n",
__func__));
m_freem(txd->tx_m);
txd->tx_m = NULL;
}
sc->nge_cdata.nge_tx_cons = cons;
if (sc->nge_cdata.nge_tx_cnt == 0)
sc->nge_watchdog_timer = 0;
}
static void
nge_tick(void *xsc)
{
struct nge_softc *sc;
struct mii_data *mii;
sc = xsc;
NGE_LOCK_ASSERT(sc);
mii = device_get_softc(sc->nge_miibus);
mii_tick(mii);
/*
* For PHYs that does not reset established link, it is
* necessary to check whether driver still have a valid
* link(e.g link state change callback is not called).
* Otherwise, driver think it lost link because driver
* initialization routine clears link state flag.
*/
if ((sc->nge_flags & NGE_FLAG_LINK) == 0)
nge_miibus_statchg(sc->nge_dev);
nge_stats_update(sc);
nge_watchdog(sc);
callout_reset(&sc->nge_stat_ch, hz, nge_tick, sc);
}
static void
nge_stats_update(struct nge_softc *sc)
{
struct ifnet *ifp;
struct nge_stats now, *stats, *nstats;
NGE_LOCK_ASSERT(sc);
ifp = sc->nge_ifp;
stats = &now;
stats->rx_pkts_errs =
CSR_READ_4(sc, NGE_MIB_RXERRPKT) & 0xFFFF;
stats->rx_crc_errs =
CSR_READ_4(sc, NGE_MIB_RXERRFCS) & 0xFFFF;
stats->rx_fifo_oflows =
CSR_READ_4(sc, NGE_MIB_RXERRMISSEDPKT) & 0xFFFF;
stats->rx_align_errs =
CSR_READ_4(sc, NGE_MIB_RXERRALIGN) & 0xFFFF;
stats->rx_sym_errs =
CSR_READ_4(sc, NGE_MIB_RXERRSYM) & 0xFFFF;
stats->rx_pkts_jumbos =
CSR_READ_4(sc, NGE_MIB_RXERRGIANT) & 0xFFFF;
stats->rx_len_errs =
CSR_READ_4(sc, NGE_MIB_RXERRRANGLEN) & 0xFFFF;
stats->rx_unctl_frames =
CSR_READ_4(sc, NGE_MIB_RXBADOPCODE) & 0xFFFF;
stats->rx_pause =
CSR_READ_4(sc, NGE_MIB_RXPAUSEPKTS) & 0xFFFF;
stats->tx_pause =
CSR_READ_4(sc, NGE_MIB_TXPAUSEPKTS) & 0xFFFF;
stats->tx_seq_errs =
CSR_READ_4(sc, NGE_MIB_TXERRSQE) & 0xFF;
/*
* Since we've accept errored frames exclude Rx length errors.
*/
ifp->if_ierrors += stats->rx_pkts_errs + stats->rx_crc_errs +
stats->rx_fifo_oflows + stats->rx_sym_errs;
nstats = &sc->nge_stats;
nstats->rx_pkts_errs += stats->rx_pkts_errs;
nstats->rx_crc_errs += stats->rx_crc_errs;
nstats->rx_fifo_oflows += stats->rx_fifo_oflows;
nstats->rx_align_errs += stats->rx_align_errs;
nstats->rx_sym_errs += stats->rx_sym_errs;
nstats->rx_pkts_jumbos += stats->rx_pkts_jumbos;
nstats->rx_len_errs += stats->rx_len_errs;
nstats->rx_unctl_frames += stats->rx_unctl_frames;
nstats->rx_pause += stats->rx_pause;
nstats->tx_pause += stats->tx_pause;
nstats->tx_seq_errs += stats->tx_seq_errs;
}
#ifdef DEVICE_POLLING
static poll_handler_t nge_poll;
static int
nge_poll(struct ifnet *ifp, enum poll_cmd cmd, int count)
{
struct nge_softc *sc;
int rx_npkts = 0;
sc = ifp->if_softc;
NGE_LOCK(sc);
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
NGE_UNLOCK(sc);
return (rx_npkts);
}
/*
* On the nge, reading the status register also clears it.
* So before returning to intr mode we must make sure that all
* possible pending sources of interrupts have been served.
* In practice this means run to completion the *eof routines,
* and then call the interrupt routine.
*/
sc->rxcycles = count;
rx_npkts = nge_rxeof(sc);
nge_txeof(sc);
if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
nge_start_locked(ifp);
if (sc->rxcycles > 0 || cmd == POLL_AND_CHECK_STATUS) {
uint32_t status;
/* Reading the ISR register clears all interrupts. */
status = CSR_READ_4(sc, NGE_ISR);
if ((status & (NGE_ISR_RX_ERR|NGE_ISR_RX_OFLOW)) != 0)
rx_npkts += nge_rxeof(sc);
if ((status & NGE_ISR_RX_IDLE) != 0)
NGE_SETBIT(sc, NGE_CSR, NGE_CSR_RX_ENABLE);
if ((status & NGE_ISR_SYSERR) != 0) {
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
nge_init_locked(sc);
}
}
NGE_UNLOCK(sc);
return (rx_npkts);
}
#endif /* DEVICE_POLLING */
static void
nge_intr(void *arg)
{
struct nge_softc *sc;
struct ifnet *ifp;
uint32_t status;
sc = (struct nge_softc *)arg;
ifp = sc->nge_ifp;
NGE_LOCK(sc);
if ((sc->nge_flags & NGE_FLAG_SUSPENDED) != 0)
goto done_locked;
/* Reading the ISR register clears all interrupts. */
status = CSR_READ_4(sc, NGE_ISR);
if (status == 0xffffffff || (status & NGE_INTRS) == 0)
goto done_locked;
#ifdef DEVICE_POLLING
if ((ifp->if_capenable & IFCAP_POLLING) != 0)
goto done_locked;
#endif
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
goto done_locked;
/* Disable interrupts. */
CSR_WRITE_4(sc, NGE_IER, 0);
/* Data LED on for TBI mode */
if ((sc->nge_flags & NGE_FLAG_TBI) != 0)
CSR_WRITE_4(sc, NGE_GPIO,
CSR_READ_4(sc, NGE_GPIO) | NGE_GPIO_GP3_OUT);
for (; (status & NGE_INTRS) != 0;) {
if ((status & (NGE_ISR_TX_DESC_OK | NGE_ISR_TX_ERR |
NGE_ISR_TX_OK | NGE_ISR_TX_IDLE)) != 0)
nge_txeof(sc);
if ((status & (NGE_ISR_RX_DESC_OK | NGE_ISR_RX_ERR |
NGE_ISR_RX_OFLOW | NGE_ISR_RX_FIFO_OFLOW |
NGE_ISR_RX_IDLE | NGE_ISR_RX_OK)) != 0)
nge_rxeof(sc);
if ((status & NGE_ISR_RX_IDLE) != 0)
NGE_SETBIT(sc, NGE_CSR, NGE_CSR_RX_ENABLE);
if ((status & NGE_ISR_SYSERR) != 0) {
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
nge_init_locked(sc);
}
/* Reading the ISR register clears all interrupts. */
status = CSR_READ_4(sc, NGE_ISR);
}
/* Re-enable interrupts. */
CSR_WRITE_4(sc, NGE_IER, 1);
if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
nge_start_locked(ifp);
/* Data LED off for TBI mode */
if ((sc->nge_flags & NGE_FLAG_TBI) != 0)
CSR_WRITE_4(sc, NGE_GPIO,
CSR_READ_4(sc, NGE_GPIO) & ~NGE_GPIO_GP3_OUT);
done_locked:
NGE_UNLOCK(sc);
}
/*
* Encapsulate an mbuf chain in a descriptor by coupling the mbuf data
* pointers to the fragment pointers.
*/
static int
nge_encap(struct nge_softc *sc, struct mbuf **m_head)
{
struct nge_txdesc *txd, *txd_last;
struct nge_desc *desc;
struct mbuf *m;
bus_dmamap_t map;
bus_dma_segment_t txsegs[NGE_MAXTXSEGS];
int error, i, nsegs, prod, si;
NGE_LOCK_ASSERT(sc);
m = *m_head;
prod = sc->nge_cdata.nge_tx_prod;
txd = &sc->nge_cdata.nge_txdesc[prod];
txd_last = txd;
map = txd->tx_dmamap;
error = bus_dmamap_load_mbuf_sg(sc->nge_cdata.nge_tx_tag, map,
*m_head, txsegs, &nsegs, BUS_DMA_NOWAIT);
if (error == EFBIG) {
m = m_collapse(*m_head, M_DONTWAIT, NGE_MAXTXSEGS);
if (m == NULL) {
m_freem(*m_head);
*m_head = NULL;
return (ENOBUFS);
}
*m_head = m;
error = bus_dmamap_load_mbuf_sg(sc->nge_cdata.nge_tx_tag,
map, *m_head, txsegs, &nsegs, BUS_DMA_NOWAIT);
if (error != 0) {
m_freem(*m_head);
*m_head = NULL;
return (error);
}
} else if (error != 0)
return (error);
if (nsegs == 0) {
m_freem(*m_head);
*m_head = NULL;
return (EIO);
}
/* Check number of available descriptors. */
if (sc->nge_cdata.nge_tx_cnt + nsegs >= (NGE_TX_RING_CNT - 1)) {
bus_dmamap_unload(sc->nge_cdata.nge_tx_tag, map);
return (ENOBUFS);
}
bus_dmamap_sync(sc->nge_cdata.nge_tx_tag, map, BUS_DMASYNC_PREWRITE);
si = prod;
for (i = 0; i < nsegs; i++) {
desc = &sc->nge_rdata.nge_tx_ring[prod];
desc->nge_ptr = htole32(NGE_ADDR_LO(txsegs[i].ds_addr));
if (i == 0)
desc->nge_cmdsts = htole32(txsegs[i].ds_len |
NGE_CMDSTS_MORE);
else
desc->nge_cmdsts = htole32(txsegs[i].ds_len |
NGE_CMDSTS_MORE | NGE_CMDSTS_OWN);
desc->nge_extsts = 0;
sc->nge_cdata.nge_tx_cnt++;
NGE_INC(prod, NGE_TX_RING_CNT);
}
/* Update producer index. */
sc->nge_cdata.nge_tx_prod = prod;
prod = (prod + NGE_TX_RING_CNT - 1) % NGE_TX_RING_CNT;
desc = &sc->nge_rdata.nge_tx_ring[prod];
/* Check if we have a VLAN tag to insert. */
if ((m->m_flags & M_VLANTAG) != 0)
desc->nge_extsts |= htole32(NGE_TXEXTSTS_VLANPKT |
bswap16(m->m_pkthdr.ether_vtag));
/* Set EOP on the last desciptor. */
desc->nge_cmdsts &= htole32(~NGE_CMDSTS_MORE);
/* Set checksum offload in the first descriptor. */
desc = &sc->nge_rdata.nge_tx_ring[si];
if ((m->m_pkthdr.csum_flags & NGE_CSUM_FEATURES) != 0) {
if ((m->m_pkthdr.csum_flags & CSUM_IP) != 0)
desc->nge_extsts |= htole32(NGE_TXEXTSTS_IPCSUM);
if ((m->m_pkthdr.csum_flags & CSUM_TCP) != 0)
desc->nge_extsts |= htole32(NGE_TXEXTSTS_TCPCSUM);
if ((m->m_pkthdr.csum_flags & CSUM_UDP) != 0)
desc->nge_extsts |= htole32(NGE_TXEXTSTS_UDPCSUM);
}
/* Lastly, turn the first descriptor ownership to hardware. */
desc->nge_cmdsts |= htole32(NGE_CMDSTS_OWN);
txd = &sc->nge_cdata.nge_txdesc[prod];
map = txd_last->tx_dmamap;
txd_last->tx_dmamap = txd->tx_dmamap;
txd->tx_dmamap = map;
txd->tx_m = m;
return (0);
}
/*
* Main transmit routine. To avoid having to do mbuf copies, we put pointers
* to the mbuf data regions directly in the transmit lists. We also save a
* copy of the pointers since the transmit list fragment pointers are
* physical addresses.
*/
static void
nge_start(struct ifnet *ifp)
{
struct nge_softc *sc;
sc = ifp->if_softc;
NGE_LOCK(sc);
nge_start_locked(ifp);
NGE_UNLOCK(sc);
}
static void
nge_start_locked(struct ifnet *ifp)
{
struct nge_softc *sc;
struct mbuf *m_head;
int enq;
sc = ifp->if_softc;
NGE_LOCK_ASSERT(sc);
if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
IFF_DRV_RUNNING || (sc->nge_flags & NGE_FLAG_LINK) == 0)
return;
for (enq = 0; !IFQ_DRV_IS_EMPTY(&ifp->if_snd) &&
sc->nge_cdata.nge_tx_cnt < NGE_TX_RING_CNT - 2; ) {
IFQ_DRV_DEQUEUE(&ifp->if_snd, m_head);
if (m_head == NULL)
break;
/*
* Pack the data into the transmit ring. If we
* don't have room, set the OACTIVE flag and wait
* for the NIC to drain the ring.
*/
if (nge_encap(sc, &m_head)) {
if (m_head == NULL)
break;
IFQ_DRV_PREPEND(&ifp->if_snd, m_head);
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
break;
}
enq++;
/*
* If there's a BPF listener, bounce a copy of this frame
* to him.
*/
ETHER_BPF_MTAP(ifp, m_head);
}
if (enq > 0) {
bus_dmamap_sync(sc->nge_cdata.nge_tx_ring_tag,
sc->nge_cdata.nge_tx_ring_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
/* Transmit */
NGE_SETBIT(sc, NGE_CSR, NGE_CSR_TX_ENABLE);
/* Set a timeout in case the chip goes out to lunch. */
sc->nge_watchdog_timer = 5;
}
}
static void
nge_init(void *xsc)
{
struct nge_softc *sc = xsc;
NGE_LOCK(sc);
nge_init_locked(sc);
NGE_UNLOCK(sc);
}
static void
nge_init_locked(struct nge_softc *sc)
{
struct ifnet *ifp = sc->nge_ifp;
struct mii_data *mii;
uint8_t *eaddr;
uint32_t reg;
NGE_LOCK_ASSERT(sc);
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0)
return;
/*
* Cancel pending I/O and free all RX/TX buffers.
*/
nge_stop(sc);
/* Reset the adapter. */
nge_reset(sc);
/* Disable Rx filter prior to programming Rx filter. */
CSR_WRITE_4(sc, NGE_RXFILT_CTL, 0);
CSR_BARRIER_WRITE_4(sc, NGE_RXFILT_CTL);
mii = device_get_softc(sc->nge_miibus);
/* Set MAC address. */
eaddr = IF_LLADDR(sc->nge_ifp);
CSR_WRITE_4(sc, NGE_RXFILT_CTL, NGE_FILTADDR_PAR0);
CSR_WRITE_4(sc, NGE_RXFILT_DATA, (eaddr[1] << 8) | eaddr[0]);
CSR_WRITE_4(sc, NGE_RXFILT_CTL, NGE_FILTADDR_PAR1);
CSR_WRITE_4(sc, NGE_RXFILT_DATA, (eaddr[3] << 8) | eaddr[2]);
CSR_WRITE_4(sc, NGE_RXFILT_CTL, NGE_FILTADDR_PAR2);
CSR_WRITE_4(sc, NGE_RXFILT_DATA, (eaddr[5] << 8) | eaddr[4]);
/* Init circular RX list. */
if (nge_list_rx_init(sc) == ENOBUFS) {
device_printf(sc->nge_dev, "initialization failed: no "
"memory for rx buffers\n");
nge_stop(sc);
return;
}
/*
* Init tx descriptors.
*/
nge_list_tx_init(sc);
/*
* For the NatSemi chip, we have to explicitly enable the
* reception of ARP frames, as well as turn on the 'perfect
* match' filter where we store the station address, otherwise
* we won't receive unicasts meant for this host.
*/
NGE_SETBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_ARP);
NGE_SETBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_PERFECT);
/*
* Set the capture broadcast bit to capture broadcast frames.
*/
if (ifp->if_flags & IFF_BROADCAST) {
NGE_SETBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_BROAD);
} else {
NGE_CLRBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_BROAD);
}
/* Turn the receive filter on. */
NGE_SETBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_ENABLE);
/* Set Rx filter. */
nge_rxfilter(sc);
/* Disable PRIQ ctl. */
CSR_WRITE_4(sc, NGE_PRIOQCTL, 0);
/*
* Set pause frames paramters.
* Rx stat FIFO hi-threshold : 2 or more packets
* Rx stat FIFO lo-threshold : less than 2 packets
* Rx data FIFO hi-threshold : 2K or more bytes
* Rx data FIFO lo-threshold : less than 2K bytes
* pause time : (512ns * 0xffff) -> 33.55ms
*/
CSR_WRITE_4(sc, NGE_PAUSECSR,
NGE_PAUSECSR_PAUSE_ON_MCAST |
NGE_PAUSECSR_PAUSE_ON_DA |
((1 << 24) & NGE_PAUSECSR_RX_STATFIFO_THR_HI) |
((1 << 22) & NGE_PAUSECSR_RX_STATFIFO_THR_LO) |
((1 << 20) & NGE_PAUSECSR_RX_DATAFIFO_THR_HI) |
((1 << 18) & NGE_PAUSECSR_RX_DATAFIFO_THR_LO) |
NGE_PAUSECSR_CNT);
/*
* Load the address of the RX and TX lists.
*/
CSR_WRITE_4(sc, NGE_RX_LISTPTR_HI,
NGE_ADDR_HI(sc->nge_rdata.nge_rx_ring_paddr));
CSR_WRITE_4(sc, NGE_RX_LISTPTR_LO,
NGE_ADDR_LO(sc->nge_rdata.nge_rx_ring_paddr));
CSR_WRITE_4(sc, NGE_TX_LISTPTR_HI,
NGE_ADDR_HI(sc->nge_rdata.nge_tx_ring_paddr));
CSR_WRITE_4(sc, NGE_TX_LISTPTR_LO,
NGE_ADDR_LO(sc->nge_rdata.nge_tx_ring_paddr));
/* Set RX configuration. */
CSR_WRITE_4(sc, NGE_RX_CFG, NGE_RXCFG);
CSR_WRITE_4(sc, NGE_VLAN_IP_RXCTL, 0);
/*
* Enable hardware checksum validation for all IPv4
* packets, do not reject packets with bad checksums.
*/
if ((ifp->if_capenable & IFCAP_RXCSUM) != 0)
NGE_SETBIT(sc, NGE_VLAN_IP_RXCTL, NGE_VIPRXCTL_IPCSUM_ENB);
/*
* Tell the chip to detect and strip VLAN tag info from
* received frames. The tag will be provided in the extsts
* field in the RX descriptors.
*/
NGE_SETBIT(sc, NGE_VLAN_IP_RXCTL, NGE_VIPRXCTL_TAG_DETECT_ENB);
if ((ifp->if_capenable & IFCAP_VLAN_HWTAGGING) != 0)
NGE_SETBIT(sc, NGE_VLAN_IP_RXCTL, NGE_VIPRXCTL_TAG_STRIP_ENB);
/* Set TX configuration. */
CSR_WRITE_4(sc, NGE_TX_CFG, NGE_TXCFG);
/*
* Enable TX IPv4 checksumming on a per-packet basis.
*/
CSR_WRITE_4(sc, NGE_VLAN_IP_TXCTL, NGE_VIPTXCTL_CSUM_PER_PKT);
/*
* Tell the chip to insert VLAN tags on a per-packet basis as
* dictated by the code in the frame encapsulation routine.
*/
NGE_SETBIT(sc, NGE_VLAN_IP_TXCTL, NGE_VIPTXCTL_TAG_PER_PKT);
/*
* Enable the delivery of PHY interrupts based on
* link/speed/duplex status changes. Also enable the
* extsts field in the DMA descriptors (needed for
* TCP/IP checksum offload on transmit).
*/
NGE_SETBIT(sc, NGE_CFG, NGE_CFG_PHYINTR_SPD |
NGE_CFG_PHYINTR_LNK | NGE_CFG_PHYINTR_DUP | NGE_CFG_EXTSTS_ENB);
/*
* Configure interrupt holdoff (moderation). We can
* have the chip delay interrupt delivery for a certain
* period. Units are in 100us, and the max setting
* is 25500us (0xFF x 100us). Default is a 100us holdoff.
*/
CSR_WRITE_4(sc, NGE_IHR, sc->nge_int_holdoff);
/*
* Enable MAC statistics counters and clear.
*/
reg = CSR_READ_4(sc, NGE_MIBCTL);
reg &= ~NGE_MIBCTL_FREEZE_CNT;
reg |= NGE_MIBCTL_CLEAR_CNT;
CSR_WRITE_4(sc, NGE_MIBCTL, reg);
/*
* Enable interrupts.
*/
CSR_WRITE_4(sc, NGE_IMR, NGE_INTRS);
#ifdef DEVICE_POLLING
/*
* ... only enable interrupts if we are not polling, make sure
* they are off otherwise.
*/
if ((ifp->if_capenable & IFCAP_POLLING) != 0)
CSR_WRITE_4(sc, NGE_IER, 0);
else
#endif
CSR_WRITE_4(sc, NGE_IER, 1);
sc->nge_flags &= ~NGE_FLAG_LINK;
mii_mediachg(mii);
sc->nge_watchdog_timer = 0;
callout_reset(&sc->nge_stat_ch, hz, nge_tick, sc);
ifp->if_drv_flags |= IFF_DRV_RUNNING;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
}
/*
* Set media options.
*/
static int
nge_mediachange(struct ifnet *ifp)
{
struct nge_softc *sc;
struct mii_data *mii;
struct mii_softc *miisc;
int error;
sc = ifp->if_softc;
NGE_LOCK(sc);
mii = device_get_softc(sc->nge_miibus);
LIST_FOREACH(miisc, &mii->mii_phys, mii_list)
PHY_RESET(miisc);
error = mii_mediachg(mii);
NGE_UNLOCK(sc);
return (error);
}
/*
* Report current media status.
*/
static void
nge_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr)
{
struct nge_softc *sc;
struct mii_data *mii;
sc = ifp->if_softc;
NGE_LOCK(sc);
mii = device_get_softc(sc->nge_miibus);
mii_pollstat(mii);
NGE_UNLOCK(sc);
ifmr->ifm_active = mii->mii_media_active;
ifmr->ifm_status = mii->mii_media_status;
}
static int
nge_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
{
struct nge_softc *sc = ifp->if_softc;
struct ifreq *ifr = (struct ifreq *) data;
struct mii_data *mii;
int error = 0, mask;
switch (command) {
case SIOCSIFMTU:
if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > NGE_JUMBO_MTU)
error = EINVAL;
else {
NGE_LOCK(sc);
ifp->if_mtu = ifr->ifr_mtu;
/*
* Workaround: if the MTU is larger than
* 8152 (TX FIFO size minus 64 minus 18), turn off
* TX checksum offloading.
*/
if (ifr->ifr_mtu >= 8152) {
ifp->if_capenable &= ~IFCAP_TXCSUM;
ifp->if_hwassist &= ~NGE_CSUM_FEATURES;
} else {
ifp->if_capenable |= IFCAP_TXCSUM;
ifp->if_hwassist |= NGE_CSUM_FEATURES;
}
NGE_UNLOCK(sc);
VLAN_CAPABILITIES(ifp);
}
break;
case SIOCSIFFLAGS:
NGE_LOCK(sc);
if ((ifp->if_flags & IFF_UP) != 0) {
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) {
if ((ifp->if_flags ^ sc->nge_if_flags) &
(IFF_PROMISC | IFF_ALLMULTI))
nge_rxfilter(sc);
} else {
if ((sc->nge_flags & NGE_FLAG_DETACH) == 0)
nge_init_locked(sc);
}
} else {
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0)
nge_stop(sc);
}
sc->nge_if_flags = ifp->if_flags;
NGE_UNLOCK(sc);
error = 0;
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
NGE_LOCK(sc);
nge_rxfilter(sc);
NGE_UNLOCK(sc);
error = 0;
break;
case SIOCGIFMEDIA:
case SIOCSIFMEDIA:
mii = device_get_softc(sc->nge_miibus);
error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
break;
case SIOCSIFCAP:
NGE_LOCK(sc);
mask = ifr->ifr_reqcap ^ ifp->if_capenable;
#ifdef DEVICE_POLLING
if ((mask & IFCAP_POLLING) != 0 &&
(IFCAP_POLLING & ifp->if_capabilities) != 0) {
ifp->if_capenable ^= IFCAP_POLLING;
if ((IFCAP_POLLING & ifp->if_capenable) != 0) {
error = ether_poll_register(nge_poll, ifp);
if (error != 0) {
NGE_UNLOCK(sc);
break;
}
/* Disable interrupts. */
CSR_WRITE_4(sc, NGE_IER, 0);
} else {
error = ether_poll_deregister(ifp);
/* Enable interrupts. */
CSR_WRITE_4(sc, NGE_IER, 1);
}
}
#endif /* DEVICE_POLLING */
if ((mask & IFCAP_TXCSUM) != 0 &&
(IFCAP_TXCSUM & ifp->if_capabilities) != 0) {
ifp->if_capenable ^= IFCAP_TXCSUM;
if ((IFCAP_TXCSUM & ifp->if_capenable) != 0)
ifp->if_hwassist |= NGE_CSUM_FEATURES;
else
ifp->if_hwassist &= ~NGE_CSUM_FEATURES;
}
if ((mask & IFCAP_RXCSUM) != 0 &&
(IFCAP_RXCSUM & ifp->if_capabilities) != 0)
ifp->if_capenable ^= IFCAP_RXCSUM;
if ((mask & IFCAP_WOL) != 0 &&
(ifp->if_capabilities & IFCAP_WOL) != 0) {
if ((mask & IFCAP_WOL_UCAST) != 0)
ifp->if_capenable ^= IFCAP_WOL_UCAST;
if ((mask & IFCAP_WOL_MCAST) != 0)
ifp->if_capenable ^= IFCAP_WOL_MCAST;
if ((mask & IFCAP_WOL_MAGIC) != 0)
ifp->if_capenable ^= IFCAP_WOL_MAGIC;
}
if ((mask & IFCAP_VLAN_HWCSUM) != 0 &&
(ifp->if_capabilities & IFCAP_VLAN_HWCSUM) != 0)
ifp->if_capenable ^= IFCAP_VLAN_HWCSUM;
if ((mask & IFCAP_VLAN_HWTAGGING) != 0 &&
(ifp->if_capabilities & IFCAP_VLAN_HWTAGGING) != 0) {
ifp->if_capenable ^= IFCAP_VLAN_HWTAGGING;
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) {
if ((ifp->if_capenable &
IFCAP_VLAN_HWTAGGING) != 0)
NGE_SETBIT(sc,
NGE_VLAN_IP_RXCTL,
NGE_VIPRXCTL_TAG_STRIP_ENB);
else
NGE_CLRBIT(sc,
NGE_VLAN_IP_RXCTL,
NGE_VIPRXCTL_TAG_STRIP_ENB);
}
}
/*
* Both VLAN hardware tagging and checksum offload is
* required to do checksum offload on VLAN interface.
*/
if ((ifp->if_capenable & IFCAP_TXCSUM) == 0)
ifp->if_capenable &= ~IFCAP_VLAN_HWCSUM;
if ((ifp->if_capenable & IFCAP_VLAN_HWTAGGING) == 0)
ifp->if_capenable &= ~IFCAP_VLAN_HWCSUM;
NGE_UNLOCK(sc);
VLAN_CAPABILITIES(ifp);
break;
default:
error = ether_ioctl(ifp, command, data);
break;
}
return (error);
}
static void
nge_watchdog(struct nge_softc *sc)
{
struct ifnet *ifp;
NGE_LOCK_ASSERT(sc);
if (sc->nge_watchdog_timer == 0 || --sc->nge_watchdog_timer)
return;
ifp = sc->nge_ifp;
ifp->if_oerrors++;
if_printf(ifp, "watchdog timeout\n");
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
nge_init_locked(sc);
if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
nge_start_locked(ifp);
}
static int
nge_stop_mac(struct nge_softc *sc)
{
uint32_t reg;
int i;
NGE_LOCK_ASSERT(sc);
reg = CSR_READ_4(sc, NGE_CSR);
if ((reg & (NGE_CSR_TX_ENABLE | NGE_CSR_RX_ENABLE)) != 0) {
reg &= ~(NGE_CSR_TX_ENABLE | NGE_CSR_RX_ENABLE);
reg |= NGE_CSR_TX_DISABLE | NGE_CSR_RX_DISABLE;
CSR_WRITE_4(sc, NGE_CSR, reg);
for (i = 0; i < NGE_TIMEOUT; i++) {
DELAY(1);
if ((CSR_READ_4(sc, NGE_CSR) &
(NGE_CSR_RX_ENABLE | NGE_CSR_TX_ENABLE)) == 0)
break;
}
if (i == NGE_TIMEOUT)
return (ETIMEDOUT);
}
return (0);
}
/*
* Stop the adapter and free any mbufs allocated to the
* RX and TX lists.
*/
static void
nge_stop(struct nge_softc *sc)
{
struct nge_txdesc *txd;
struct nge_rxdesc *rxd;
int i;
struct ifnet *ifp;
NGE_LOCK_ASSERT(sc);
ifp = sc->nge_ifp;
ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
sc->nge_flags &= ~NGE_FLAG_LINK;
callout_stop(&sc->nge_stat_ch);
sc->nge_watchdog_timer = 0;
CSR_WRITE_4(sc, NGE_IER, 0);
CSR_WRITE_4(sc, NGE_IMR, 0);
if (nge_stop_mac(sc) == ETIMEDOUT)
device_printf(sc->nge_dev,
"%s: unable to stop Tx/Rx MAC\n", __func__);
CSR_WRITE_4(sc, NGE_TX_LISTPTR_HI, 0);
CSR_WRITE_4(sc, NGE_TX_LISTPTR_LO, 0);
CSR_WRITE_4(sc, NGE_RX_LISTPTR_HI, 0);
CSR_WRITE_4(sc, NGE_RX_LISTPTR_LO, 0);
nge_stats_update(sc);
if (sc->nge_head != NULL) {
m_freem(sc->nge_head);
sc->nge_head = sc->nge_tail = NULL;
}
/*
* Free RX and TX mbufs still in the queues.
*/
for (i = 0; i < NGE_RX_RING_CNT; i++) {
rxd = &sc->nge_cdata.nge_rxdesc[i];
if (rxd->rx_m != NULL) {
bus_dmamap_sync(sc->nge_cdata.nge_rx_tag,
rxd->rx_dmamap, BUS_DMASYNC_POSTREAD);
bus_dmamap_unload(sc->nge_cdata.nge_rx_tag,
rxd->rx_dmamap);
m_freem(rxd->rx_m);
rxd->rx_m = NULL;
}
}
for (i = 0; i < NGE_TX_RING_CNT; i++) {
txd = &sc->nge_cdata.nge_txdesc[i];
if (txd->tx_m != NULL) {
bus_dmamap_sync(sc->nge_cdata.nge_tx_tag,
txd->tx_dmamap, BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->nge_cdata.nge_tx_tag,
txd->tx_dmamap);
m_freem(txd->tx_m);
txd->tx_m = NULL;
}
}
}
/*
* Before setting WOL bits, caller should have stopped Receiver.
*/
static void
nge_wol(struct nge_softc *sc)
{
struct ifnet *ifp;
uint32_t reg;
uint16_t pmstat;
int pmc;
NGE_LOCK_ASSERT(sc);
if (pci_find_cap(sc->nge_dev, PCIY_PMG, &pmc) != 0)
return;
ifp = sc->nge_ifp;
if ((ifp->if_capenable & IFCAP_WOL) == 0) {
/* Disable WOL & disconnect CLKRUN to save power. */
CSR_WRITE_4(sc, NGE_WOLCSR, 0);
CSR_WRITE_4(sc, NGE_CLKRUN, 0);
} else {
if (nge_stop_mac(sc) == ETIMEDOUT)
device_printf(sc->nge_dev,
"%s: unable to stop Tx/Rx MAC\n", __func__);
/*
* Make sure wake frames will be buffered in the Rx FIFO.
* (i.e. Silent Rx mode.)
*/
CSR_WRITE_4(sc, NGE_RX_LISTPTR_HI, 0);
CSR_BARRIER_WRITE_4(sc, NGE_RX_LISTPTR_HI);
CSR_WRITE_4(sc, NGE_RX_LISTPTR_LO, 0);
CSR_BARRIER_WRITE_4(sc, NGE_RX_LISTPTR_LO);
/* Enable Rx again. */
NGE_SETBIT(sc, NGE_CSR, NGE_CSR_RX_ENABLE);
CSR_BARRIER_WRITE_4(sc, NGE_CSR);
/* Configure WOL events. */
reg = 0;
if ((ifp->if_capenable & IFCAP_WOL_UCAST) != 0)
reg |= NGE_WOLCSR_WAKE_ON_UNICAST;
if ((ifp->if_capenable & IFCAP_WOL_MCAST) != 0)
reg |= NGE_WOLCSR_WAKE_ON_MULTICAST;
if ((ifp->if_capenable & IFCAP_WOL_MAGIC) != 0)
reg |= NGE_WOLCSR_WAKE_ON_MAGICPKT;
CSR_WRITE_4(sc, NGE_WOLCSR, reg);
/* Activate CLKRUN. */
reg = CSR_READ_4(sc, NGE_CLKRUN);
reg |= NGE_CLKRUN_PMEENB | NGE_CLNRUN_CLKRUN_ENB;
CSR_WRITE_4(sc, NGE_CLKRUN, reg);
}
/* Request PME. */
pmstat = pci_read_config(sc->nge_dev, pmc + PCIR_POWER_STATUS, 2);
pmstat &= ~(PCIM_PSTAT_PME | PCIM_PSTAT_PMEENABLE);
if ((ifp->if_capenable & IFCAP_WOL) != 0)
pmstat |= PCIM_PSTAT_PME | PCIM_PSTAT_PMEENABLE;
pci_write_config(sc->nge_dev, pmc + PCIR_POWER_STATUS, pmstat, 2);
}
/*
* Stop all chip I/O so that the kernel's probe routines don't
* get confused by errant DMAs when rebooting.
*/
static int
nge_shutdown(device_t dev)
{
return (nge_suspend(dev));
}
static int
nge_suspend(device_t dev)
{
struct nge_softc *sc;
sc = device_get_softc(dev);
NGE_LOCK(sc);
nge_stop(sc);
nge_wol(sc);
sc->nge_flags |= NGE_FLAG_SUSPENDED;
NGE_UNLOCK(sc);
return (0);
}
static int
nge_resume(device_t dev)
{
struct nge_softc *sc;
struct ifnet *ifp;
uint16_t pmstat;
int pmc;
sc = device_get_softc(dev);
NGE_LOCK(sc);
ifp = sc->nge_ifp;
if (pci_find_cap(sc->nge_dev, PCIY_PMG, &pmc) == 0) {
/* Disable PME and clear PME status. */
pmstat = pci_read_config(sc->nge_dev,
pmc + PCIR_POWER_STATUS, 2);
if ((pmstat & PCIM_PSTAT_PMEENABLE) != 0) {
pmstat &= ~PCIM_PSTAT_PMEENABLE;
pci_write_config(sc->nge_dev,
pmc + PCIR_POWER_STATUS, pmstat, 2);
}
}
if (ifp->if_flags & IFF_UP) {
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
nge_init_locked(sc);
}
sc->nge_flags &= ~NGE_FLAG_SUSPENDED;
NGE_UNLOCK(sc);
return (0);
}
#define NGE_SYSCTL_STAT_ADD32(c, h, n, p, d) \
SYSCTL_ADD_UINT(c, h, OID_AUTO, n, CTLFLAG_RD, p, 0, d)
static void
nge_sysctl_node(struct nge_softc *sc)
{
struct sysctl_ctx_list *ctx;
struct sysctl_oid_list *child, *parent;
struct sysctl_oid *tree;
struct nge_stats *stats;
int error;
ctx = device_get_sysctl_ctx(sc->nge_dev);
child = SYSCTL_CHILDREN(device_get_sysctl_tree(sc->nge_dev));
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "int_holdoff",
CTLTYPE_INT | CTLFLAG_RW, &sc->nge_int_holdoff, 0,
sysctl_hw_nge_int_holdoff, "I", "NGE interrupt moderation");
/* Pull in device tunables. */
sc->nge_int_holdoff = NGE_INT_HOLDOFF_DEFAULT;
error = resource_int_value(device_get_name(sc->nge_dev),
device_get_unit(sc->nge_dev), "int_holdoff", &sc->nge_int_holdoff);
if (error == 0) {
if (sc->nge_int_holdoff < NGE_INT_HOLDOFF_MIN ||
sc->nge_int_holdoff > NGE_INT_HOLDOFF_MAX ) {
device_printf(sc->nge_dev,
"int_holdoff value out of range; "
"using default: %d(%d us)\n",
NGE_INT_HOLDOFF_DEFAULT,
NGE_INT_HOLDOFF_DEFAULT * 100);
sc->nge_int_holdoff = NGE_INT_HOLDOFF_DEFAULT;
}
}
stats = &sc->nge_stats;
tree = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "stats", CTLFLAG_RD,
NULL, "NGE statistics");
parent = SYSCTL_CHILDREN(tree);
/* Rx statistics. */
tree = SYSCTL_ADD_NODE(ctx, parent, OID_AUTO, "rx", CTLFLAG_RD,
NULL, "Rx MAC statistics");
child = SYSCTL_CHILDREN(tree);
NGE_SYSCTL_STAT_ADD32(ctx, child, "pkts_errs",
&stats->rx_pkts_errs,
"Packet errors including both wire errors and FIFO overruns");
NGE_SYSCTL_STAT_ADD32(ctx, child, "crc_errs",
&stats->rx_crc_errs, "CRC errors");
NGE_SYSCTL_STAT_ADD32(ctx, child, "fifo_oflows",
&stats->rx_fifo_oflows, "FIFO overflows");
NGE_SYSCTL_STAT_ADD32(ctx, child, "align_errs",
&stats->rx_align_errs, "Frame alignment errors");
NGE_SYSCTL_STAT_ADD32(ctx, child, "sym_errs",
&stats->rx_sym_errs, "One or more symbol errors");
NGE_SYSCTL_STAT_ADD32(ctx, child, "pkts_jumbos",
&stats->rx_pkts_jumbos,
"Packets received with length greater than 1518 bytes");
NGE_SYSCTL_STAT_ADD32(ctx, child, "len_errs",
&stats->rx_len_errs, "In Range Length errors");
NGE_SYSCTL_STAT_ADD32(ctx, child, "unctl_frames",
&stats->rx_unctl_frames, "Control frames with unsupported opcode");
NGE_SYSCTL_STAT_ADD32(ctx, child, "pause",
&stats->rx_pause, "Pause frames");
/* Tx statistics. */
tree = SYSCTL_ADD_NODE(ctx, parent, OID_AUTO, "tx", CTLFLAG_RD,
NULL, "Tx MAC statistics");
child = SYSCTL_CHILDREN(tree);
NGE_SYSCTL_STAT_ADD32(ctx, child, "pause",
&stats->tx_pause, "Pause frames");
NGE_SYSCTL_STAT_ADD32(ctx, child, "seq_errs",
&stats->tx_seq_errs,
"Loss of collision heartbeat during transmission");
}
#undef NGE_SYSCTL_STAT_ADD32
static int
sysctl_int_range(SYSCTL_HANDLER_ARGS, int low, int high)
{
int error, value;
if (arg1 == NULL)
return (EINVAL);
value = *(int *)arg1;
error = sysctl_handle_int(oidp, &value, 0, req);
if (error != 0 || req->newptr == NULL)
return (error);
if (value < low || value > high)
return (EINVAL);
*(int *)arg1 = value;
return (0);
}
static int
sysctl_hw_nge_int_holdoff(SYSCTL_HANDLER_ARGS)
{
return (sysctl_int_range(oidp, arg1, arg2, req, NGE_INT_HOLDOFF_MIN,
NGE_INT_HOLDOFF_MAX));
}
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