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freebsd-dev/sys/dev/re/if_re.c
John-Mark Gurney 22a11c9657 fix jumbo frames as much as they can be fixed for re. We now cap the MTU 
to 7422 since it appears that the 8169S can't transmit anything larger..
The 8169S can receive full jumbo frames, but we don't have an mru to let
the upper layers know this...

add fixup so that this driver should work on alignment constrained platforms
(!i386 && !amd64)

MFC after:	5 days
2004-09-28 18:22:24 +00:00

2473 lines
59 KiB
C
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/*
* Copyright (c) 1997, 1998-2003
* Bill Paul <wpaul@windriver.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("$FreeBSD$");
/*
* RealTek 8139C+/8169/8169S/8110S PCI NIC driver
*
* Written by Bill Paul <wpaul@windriver.com>
* Senior Networking Software Engineer
* Wind River Systems
*/
/*
* This driver is designed to support RealTek's next generation of
* 10/100 and 10/100/1000 PCI ethernet controllers. There are currently
* four devices in this family: the RTL8139C+, the RTL8169, the RTL8169S
* and the RTL8110S.
*
* The 8139C+ is a 10/100 ethernet chip. It is backwards compatible
* with the older 8139 family, however it also supports a special
* C+ mode of operation that provides several new performance enhancing
* features. These include:
*
* o Descriptor based DMA mechanism. Each descriptor represents
* a single packet fragment. Data buffers may be aligned on
* any byte boundary.
*
* o 64-bit DMA
*
* o TCP/IP checksum offload for both RX and TX
*
* o High and normal priority transmit DMA rings
*
* o VLAN tag insertion and extraction
*
* o TCP large send (segmentation offload)
*
* Like the 8139, the 8139C+ also has a built-in 10/100 PHY. The C+
* programming API is fairly straightforward. The RX filtering, EEPROM
* access and PHY access is the same as it is on the older 8139 series
* chips.
*
* The 8169 is a 64-bit 10/100/1000 gigabit ethernet MAC. It has almost the
* same programming API and feature set as the 8139C+ with the following
* differences and additions:
*
* o 1000Mbps mode
*
* o Jumbo frames
*
* o GMII and TBI ports/registers for interfacing with copper
* or fiber PHYs
*
* o RX and TX DMA rings can have up to 1024 descriptors
* (the 8139C+ allows a maximum of 64)
*
* o Slight differences in register layout from the 8139C+
*
* The TX start and timer interrupt registers are at different locations
* on the 8169 than they are on the 8139C+. Also, the status word in the
* RX descriptor has a slightly different bit layout. The 8169 does not
* have a built-in PHY. Most reference boards use a Marvell 88E1000 'Alaska'
* copper gigE PHY.
*
* The 8169S/8110S 10/100/1000 devices have built-in copper gigE PHYs
* (the 'S' stands for 'single-chip'). These devices have the same
* programming API as the older 8169, but also have some vendor-specific
* registers for the on-board PHY. The 8110S is a LAN-on-motherboard
* part designed to be pin-compatible with the RealTek 8100 10/100 chip.
*
* This driver takes advantage of the RX and TX checksum offload and
* VLAN tag insertion/extraction features. It also implements TX
* interrupt moderation using the timer interrupt registers, which
* significantly reduces TX interrupt load. There is also support
* for jumbo frames, however the 8169/8169S/8110S can not transmit
* jumbo frames larger than 7440, so the max MTU possible with this
* driver is 7422 bytes.
*/
#include <sys/param.h>
#include <sys/endian.h>
#include <sys/systm.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/kernel.h>
#include <sys/socket.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_vlan_var.h>
#include <net/bpf.h>
#include <machine/bus_pio.h>
#include <machine/bus_memio.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
MODULE_DEPEND(re, pci, 1, 1, 1);
MODULE_DEPEND(re, ether, 1, 1, 1);
MODULE_DEPEND(re, miibus, 1, 1, 1);
/* "controller miibus0" required. See GENERIC if you get errors here. */
#include "miibus_if.h"
/*
* Default to using PIO access for this driver.
*/
#define RE_USEIOSPACE
#include <pci/if_rlreg.h>
#define RE_CSUM_FEATURES (CSUM_IP | CSUM_TCP | CSUM_UDP)
/*
* Various supported device vendors/types and their names.
*/
static struct rl_type re_devs[] = {
{ RT_VENDORID, RT_DEVICEID_8139, RL_HWREV_8139CPLUS,
"RealTek 8139C+ 10/100BaseTX" },
{ RT_VENDORID, RT_DEVICEID_8169, RL_HWREV_8169,
"RealTek 8169 Gigabit Ethernet" },
{ RT_VENDORID, RT_DEVICEID_8169, RL_HWREV_8169S,
"RealTek 8169S Single-chip Gigabit Ethernet" },
{ RT_VENDORID, RT_DEVICEID_8169, RL_HWREV_8110S,
"RealTek 8110S Single-chip Gigabit Ethernet" },
{ COREGA_VENDORID, COREGA_DEVICEID_CGLAPCIGT, RL_HWREV_8169S,
"Corega CG-LAPCIGT (RTL8169S) Gigabit Ethernet" },
{ 0, 0, 0, NULL }
};
static struct rl_hwrev re_hwrevs[] = {
{ RL_HWREV_8139, RL_8139, "" },
{ RL_HWREV_8139A, RL_8139, "A" },
{ RL_HWREV_8139AG, RL_8139, "A-G" },
{ RL_HWREV_8139B, RL_8139, "B" },
{ RL_HWREV_8130, RL_8139, "8130" },
{ RL_HWREV_8139C, RL_8139, "C" },
{ RL_HWREV_8139D, RL_8139, "8139D/8100B/8100C" },
{ RL_HWREV_8139CPLUS, RL_8139CPLUS, "C+"},
{ RL_HWREV_8169, RL_8169, "8169"},
{ RL_HWREV_8169S, RL_8169, "8169S"},
{ RL_HWREV_8110S, RL_8169, "8110S"},
{ RL_HWREV_8100, RL_8139, "8100"},
{ RL_HWREV_8101, RL_8139, "8101"},
{ 0, 0, NULL }
};
static int re_probe (device_t);
static int re_attach (device_t);
static int re_detach (device_t);
static int re_encap (struct rl_softc *, struct mbuf **, int *);
static void re_dma_map_addr (void *, bus_dma_segment_t *, int, int);
static void re_dma_map_desc (void *, bus_dma_segment_t *, int,
bus_size_t, int);
static int re_allocmem (device_t, struct rl_softc *);
static int re_newbuf (struct rl_softc *, int, struct mbuf *);
static int re_rx_list_init (struct rl_softc *);
static int re_tx_list_init (struct rl_softc *);
#ifdef RE_FIXUP_RX
static __inline void re_fixup_rx
(struct mbuf *);
#endif
static void re_rxeof (struct rl_softc *);
static void re_txeof (struct rl_softc *);
#ifdef DEVICE_POLLING
static void re_poll (struct ifnet *, enum poll_cmd, int);
static void re_poll_locked (struct ifnet *, enum poll_cmd, int);
#endif
static void re_intr (void *);
static void re_tick (void *);
static void re_tick_locked (struct rl_softc *);
static void re_start (struct ifnet *);
static void re_start_locked (struct ifnet *);
static int re_ioctl (struct ifnet *, u_long, caddr_t);
static void re_init (void *);
static void re_init_locked (struct rl_softc *);
static void re_stop (struct rl_softc *);
static void re_watchdog (struct ifnet *);
static int re_suspend (device_t);
static int re_resume (device_t);
static void re_shutdown (device_t);
static int re_ifmedia_upd (struct ifnet *);
static void re_ifmedia_sts (struct ifnet *, struct ifmediareq *);
static void re_eeprom_putbyte (struct rl_softc *, int);
static void re_eeprom_getword (struct rl_softc *, int, u_int16_t *);
static void re_read_eeprom (struct rl_softc *, caddr_t, int, int, int);
static int re_gmii_readreg (device_t, int, int);
static int re_gmii_writereg (device_t, int, int, int);
static int re_miibus_readreg (device_t, int, int);
static int re_miibus_writereg (device_t, int, int, int);
static void re_miibus_statchg (device_t);
static void re_setmulti (struct rl_softc *);
static void re_reset (struct rl_softc *);
static int re_diag (struct rl_softc *);
#ifdef RE_USEIOSPACE
#define RL_RES SYS_RES_IOPORT
#define RL_RID RL_PCI_LOIO
#else
#define RL_RES SYS_RES_MEMORY
#define RL_RID RL_PCI_LOMEM
#endif
static device_method_t re_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, re_probe),
DEVMETHOD(device_attach, re_attach),
DEVMETHOD(device_detach, re_detach),
DEVMETHOD(device_suspend, re_suspend),
DEVMETHOD(device_resume, re_resume),
DEVMETHOD(device_shutdown, re_shutdown),
/* bus interface */
DEVMETHOD(bus_print_child, bus_generic_print_child),
DEVMETHOD(bus_driver_added, bus_generic_driver_added),
/* MII interface */
DEVMETHOD(miibus_readreg, re_miibus_readreg),
DEVMETHOD(miibus_writereg, re_miibus_writereg),
DEVMETHOD(miibus_statchg, re_miibus_statchg),
{ 0, 0 }
};
static driver_t re_driver = {
"re",
re_methods,
sizeof(struct rl_softc)
};
static devclass_t re_devclass;
DRIVER_MODULE(re, pci, re_driver, re_devclass, 0, 0);
DRIVER_MODULE(re, cardbus, re_driver, re_devclass, 0, 0);
DRIVER_MODULE(miibus, re, miibus_driver, miibus_devclass, 0, 0);
#define EE_SET(x) \
CSR_WRITE_1(sc, RL_EECMD, \
CSR_READ_1(sc, RL_EECMD) | x)
#define EE_CLR(x) \
CSR_WRITE_1(sc, RL_EECMD, \
CSR_READ_1(sc, RL_EECMD) & ~x)
/*
* Send a read command and address to the EEPROM, check for ACK.
*/
static void
re_eeprom_putbyte(sc, addr)
struct rl_softc *sc;
int addr;
{
register int d, i;
d = addr | sc->rl_eecmd_read;
/*
* Feed in each bit and strobe the clock.
*/
for (i = 0x400; i; i >>= 1) {
if (d & i) {
EE_SET(RL_EE_DATAIN);
} else {
EE_CLR(RL_EE_DATAIN);
}
DELAY(100);
EE_SET(RL_EE_CLK);
DELAY(150);
EE_CLR(RL_EE_CLK);
DELAY(100);
}
}
/*
* Read a word of data stored in the EEPROM at address 'addr.'
*/
static void
re_eeprom_getword(sc, addr, dest)
struct rl_softc *sc;
int addr;
u_int16_t *dest;
{
register int i;
u_int16_t word = 0;
/* Enter EEPROM access mode. */
CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_PROGRAM|RL_EE_SEL);
/*
* Send address of word we want to read.
*/
re_eeprom_putbyte(sc, addr);
CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_PROGRAM|RL_EE_SEL);
/*
* Start reading bits from EEPROM.
*/
for (i = 0x8000; i; i >>= 1) {
EE_SET(RL_EE_CLK);
DELAY(100);
if (CSR_READ_1(sc, RL_EECMD) & RL_EE_DATAOUT)
word |= i;
EE_CLR(RL_EE_CLK);
DELAY(100);
}
/* Turn off EEPROM access mode. */
CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_OFF);
*dest = word;
}
/*
* Read a sequence of words from the EEPROM.
*/
static void
re_read_eeprom(sc, dest, off, cnt, swap)
struct rl_softc *sc;
caddr_t dest;
int off;
int cnt;
int swap;
{
int i;
u_int16_t word = 0, *ptr;
for (i = 0; i < cnt; i++) {
re_eeprom_getword(sc, off + i, &word);
ptr = (u_int16_t *)(dest + (i * 2));
if (swap)
*ptr = ntohs(word);
else
*ptr = word;
}
}
static int
re_gmii_readreg(dev, phy, reg)
device_t dev;
int phy, reg;
{
struct rl_softc *sc;
u_int32_t rval;
int i;
if (phy != 1)
return (0);
sc = device_get_softc(dev);
/* Let the rgephy driver read the GMEDIASTAT register */
if (reg == RL_GMEDIASTAT) {
rval = CSR_READ_1(sc, RL_GMEDIASTAT);
return (rval);
}
CSR_WRITE_4(sc, RL_PHYAR, reg << 16);
DELAY(1000);
for (i = 0; i < RL_TIMEOUT; i++) {
rval = CSR_READ_4(sc, RL_PHYAR);
if (rval & RL_PHYAR_BUSY)
break;
DELAY(100);
}
if (i == RL_TIMEOUT) {
printf ("re%d: PHY read failed\n", sc->rl_unit);
return (0);
}
return (rval & RL_PHYAR_PHYDATA);
}
static int
re_gmii_writereg(dev, phy, reg, data)
device_t dev;
int phy, reg, data;
{
struct rl_softc *sc;
u_int32_t rval;
int i;
sc = device_get_softc(dev);
CSR_WRITE_4(sc, RL_PHYAR, (reg << 16) |
(data & RL_PHYAR_PHYDATA) | RL_PHYAR_BUSY);
DELAY(1000);
for (i = 0; i < RL_TIMEOUT; i++) {
rval = CSR_READ_4(sc, RL_PHYAR);
if (!(rval & RL_PHYAR_BUSY))
break;
DELAY(100);
}
if (i == RL_TIMEOUT) {
printf ("re%d: PHY write failed\n", sc->rl_unit);
return (0);
}
return (0);
}
static int
re_miibus_readreg(dev, phy, reg)
device_t dev;
int phy, reg;
{
struct rl_softc *sc;
u_int16_t rval = 0;
u_int16_t re8139_reg = 0;
sc = device_get_softc(dev);
if (sc->rl_type == RL_8169) {
rval = re_gmii_readreg(dev, phy, reg);
return (rval);
}
/* Pretend the internal PHY is only at address 0 */
if (phy) {
return (0);
}
switch (reg) {
case MII_BMCR:
re8139_reg = RL_BMCR;
break;
case MII_BMSR:
re8139_reg = RL_BMSR;
break;
case MII_ANAR:
re8139_reg = RL_ANAR;
break;
case MII_ANER:
re8139_reg = RL_ANER;
break;
case MII_ANLPAR:
re8139_reg = RL_LPAR;
break;
case MII_PHYIDR1:
case MII_PHYIDR2:
return (0);
/*
* Allow the rlphy driver to read the media status
* register. If we have a link partner which does not
* support NWAY, this is the register which will tell
* us the results of parallel detection.
*/
case RL_MEDIASTAT:
rval = CSR_READ_1(sc, RL_MEDIASTAT);
return (rval);
default:
printf("re%d: bad phy register\n", sc->rl_unit);
return (0);
}
rval = CSR_READ_2(sc, re8139_reg);
return (rval);
}
static int
re_miibus_writereg(dev, phy, reg, data)
device_t dev;
int phy, reg, data;
{
struct rl_softc *sc;
u_int16_t re8139_reg = 0;
int rval = 0;
sc = device_get_softc(dev);
if (sc->rl_type == RL_8169) {
rval = re_gmii_writereg(dev, phy, reg, data);
return (rval);
}
/* Pretend the internal PHY is only at address 0 */
if (phy)
return (0);
switch (reg) {
case MII_BMCR:
re8139_reg = RL_BMCR;
break;
case MII_BMSR:
re8139_reg = RL_BMSR;
break;
case MII_ANAR:
re8139_reg = RL_ANAR;
break;
case MII_ANER:
re8139_reg = RL_ANER;
break;
case MII_ANLPAR:
re8139_reg = RL_LPAR;
break;
case MII_PHYIDR1:
case MII_PHYIDR2:
return (0);
break;
default:
printf("re%d: bad phy register\n", sc->rl_unit);
return (0);
}
CSR_WRITE_2(sc, re8139_reg, data);
return (0);
}
static void
re_miibus_statchg(dev)
device_t dev;
{
}
/*
* Program the 64-bit multicast hash filter.
*/
static void
re_setmulti(sc)
struct rl_softc *sc;
{
struct ifnet *ifp;
int h = 0;
u_int32_t hashes[2] = { 0, 0 };
struct ifmultiaddr *ifma;
u_int32_t rxfilt;
int mcnt = 0;
RL_LOCK_ASSERT(sc);
ifp = &sc->arpcom.ac_if;
rxfilt = CSR_READ_4(sc, RL_RXCFG);
if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) {
rxfilt |= RL_RXCFG_RX_MULTI;
CSR_WRITE_4(sc, RL_RXCFG, rxfilt);
CSR_WRITE_4(sc, RL_MAR0, 0xFFFFFFFF);
CSR_WRITE_4(sc, RL_MAR4, 0xFFFFFFFF);
return;
}
/* first, zot all the existing hash bits */
CSR_WRITE_4(sc, RL_MAR0, 0);
CSR_WRITE_4(sc, RL_MAR4, 0);
/* now program new ones */
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) >> 26;
if (h < 32)
hashes[0] |= (1 << h);
else
hashes[1] |= (1 << (h - 32));
mcnt++;
}
if (mcnt)
rxfilt |= RL_RXCFG_RX_MULTI;
else
rxfilt &= ~RL_RXCFG_RX_MULTI;
CSR_WRITE_4(sc, RL_RXCFG, rxfilt);
CSR_WRITE_4(sc, RL_MAR0, hashes[0]);
CSR_WRITE_4(sc, RL_MAR4, hashes[1]);
}
static void
re_reset(sc)
struct rl_softc *sc;
{
register int i;
RL_LOCK_ASSERT(sc);
CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_RESET);
for (i = 0; i < RL_TIMEOUT; i++) {
DELAY(10);
if (!(CSR_READ_1(sc, RL_COMMAND) & RL_CMD_RESET))
break;
}
if (i == RL_TIMEOUT)
printf("re%d: reset never completed!\n", sc->rl_unit);
CSR_WRITE_1(sc, 0x82, 1);
}
/*
* The following routine is designed to test for a defect on some
* 32-bit 8169 cards. Some of these NICs have the REQ64# and ACK64#
* lines connected to the bus, however for a 32-bit only card, they
* should be pulled high. The result of this defect is that the
* NIC will not work right if you plug it into a 64-bit slot: DMA
* operations will be done with 64-bit transfers, which will fail
* because the 64-bit data lines aren't connected.
*
* There's no way to work around this (short of talking a soldering
* iron to the board), however we can detect it. The method we use
* here is to put the NIC into digital loopback mode, set the receiver
* to promiscuous mode, and then try to send a frame. We then compare
* the frame data we sent to what was received. If the data matches,
* then the NIC is working correctly, otherwise we know the user has
* a defective NIC which has been mistakenly plugged into a 64-bit PCI
* slot. In the latter case, there's no way the NIC can work correctly,
* so we print out a message on the console and abort the device attach.
*/
static int
re_diag(sc)
struct rl_softc *sc;
{
struct ifnet *ifp = &sc->arpcom.ac_if;
struct mbuf *m0;
struct ether_header *eh;
struct rl_desc *cur_rx;
u_int16_t status;
u_int32_t rxstat;
int total_len, i, error = 0;
u_int8_t dst[] = { 0x00, 'h', 'e', 'l', 'l', 'o' };
u_int8_t src[] = { 0x00, 'w', 'o', 'r', 'l', 'd' };
/* Allocate a single mbuf */
MGETHDR(m0, M_DONTWAIT, MT_DATA);
if (m0 == NULL)
return (ENOBUFS);
RL_LOCK(sc);
/*
* Initialize the NIC in test mode. This sets the chip up
* so that it can send and receive frames, but performs the
* following special functions:
* - Puts receiver in promiscuous mode
* - Enables digital loopback mode
* - Leaves interrupts turned off
*/
ifp->if_flags |= IFF_PROMISC;
sc->rl_testmode = 1;
re_init_locked(sc);
re_stop(sc);
DELAY(100000);
re_init_locked(sc);
/* Put some data in the mbuf */
eh = mtod(m0, struct ether_header *);
bcopy ((char *)&dst, eh->ether_dhost, ETHER_ADDR_LEN);
bcopy ((char *)&src, eh->ether_shost, ETHER_ADDR_LEN);
eh->ether_type = htons(ETHERTYPE_IP);
m0->m_pkthdr.len = m0->m_len = ETHER_MIN_LEN - ETHER_CRC_LEN;
/*
* Queue the packet, start transmission.
* Note: IF_HANDOFF() ultimately calls re_start() for us.
*/
CSR_WRITE_2(sc, RL_ISR, 0xFFFF);
RL_UNLOCK(sc);
IF_HANDOFF(&ifp->if_snd, m0, ifp);
RL_LOCK(sc);
m0 = NULL;
/* Wait for it to propagate through the chip */
DELAY(100000);
for (i = 0; i < RL_TIMEOUT; i++) {
status = CSR_READ_2(sc, RL_ISR);
if ((status & (RL_ISR_TIMEOUT_EXPIRED|RL_ISR_RX_OK)) ==
(RL_ISR_TIMEOUT_EXPIRED|RL_ISR_RX_OK))
break;
DELAY(10);
}
if (i == RL_TIMEOUT) {
printf("re%d: diagnostic failed, failed to receive packet "
"in loopback mode\n", sc->rl_unit);
error = EIO;
goto done;
}
/*
* The packet should have been dumped into the first
* entry in the RX DMA ring. Grab it from there.
*/
bus_dmamap_sync(sc->rl_ldata.rl_rx_list_tag,
sc->rl_ldata.rl_rx_list_map,
BUS_DMASYNC_POSTREAD);
bus_dmamap_sync(sc->rl_ldata.rl_mtag,
sc->rl_ldata.rl_rx_dmamap[0],
BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->rl_ldata.rl_mtag,
sc->rl_ldata.rl_rx_dmamap[0]);
m0 = sc->rl_ldata.rl_rx_mbuf[0];
sc->rl_ldata.rl_rx_mbuf[0] = NULL;
eh = mtod(m0, struct ether_header *);
cur_rx = &sc->rl_ldata.rl_rx_list[0];
total_len = RL_RXBYTES(cur_rx);
rxstat = le32toh(cur_rx->rl_cmdstat);
if (total_len != ETHER_MIN_LEN) {
printf("re%d: diagnostic failed, received short packet\n",
sc->rl_unit);
error = EIO;
goto done;
}
/* Test that the received packet data matches what we sent. */
if (bcmp((char *)&eh->ether_dhost, (char *)&dst, ETHER_ADDR_LEN) ||
bcmp((char *)&eh->ether_shost, (char *)&src, ETHER_ADDR_LEN) ||
ntohs(eh->ether_type) != ETHERTYPE_IP) {
printf("re%d: WARNING, DMA FAILURE!\n", sc->rl_unit);
printf("re%d: expected TX data: %6D/%6D/0x%x\n", sc->rl_unit,
dst, ":", src, ":", ETHERTYPE_IP);
printf("re%d: received RX data: %6D/%6D/0x%x\n", sc->rl_unit,
eh->ether_dhost, ":", eh->ether_shost, ":",
ntohs(eh->ether_type));
printf("re%d: You may have a defective 32-bit NIC plugged "
"into a 64-bit PCI slot.\n", sc->rl_unit);
printf("re%d: Please re-install the NIC in a 32-bit slot "
"for proper operation.\n", sc->rl_unit);
printf("re%d: Read the re(4) man page for more details.\n",
sc->rl_unit);
error = EIO;
}
done:
/* Turn interface off, release resources */
sc->rl_testmode = 0;
ifp->if_flags &= ~IFF_PROMISC;
re_stop(sc);
if (m0 != NULL)
m_freem(m0);
RL_UNLOCK(sc);
return (error);
}
/*
* Probe for a RealTek 8139C+/8169/8110 chip. Check the PCI vendor and device
* IDs against our list and return a device name if we find a match.
*/
static int
re_probe(dev)
device_t dev;
{
struct rl_type *t;
struct rl_softc *sc;
int rid;
u_int32_t hwrev;
t = re_devs;
sc = device_get_softc(dev);
while (t->rl_name != NULL) {
if ((pci_get_vendor(dev) == t->rl_vid) &&
(pci_get_device(dev) == t->rl_did)) {
/*
* Temporarily map the I/O space
* so we can read the chip ID register.
*/
rid = RL_RID;
sc->rl_res = bus_alloc_resource_any(dev, RL_RES, &rid,
RF_ACTIVE);
if (sc->rl_res == NULL) {
device_printf(dev,
"couldn't map ports/memory\n");
return (ENXIO);
}
sc->rl_btag = rman_get_bustag(sc->rl_res);
sc->rl_bhandle = rman_get_bushandle(sc->rl_res);
hwrev = CSR_READ_4(sc, RL_TXCFG) & RL_TXCFG_HWREV;
bus_release_resource(dev, RL_RES,
RL_RID, sc->rl_res);
if (t->rl_basetype == hwrev) {
device_set_desc(dev, t->rl_name);
return (0);
}
}
t++;
}
return (ENXIO);
}
/*
* This routine takes the segment list provided as the result of
* a bus_dma_map_load() operation and assigns the addresses/lengths
* to RealTek DMA descriptors. This can be called either by the RX
* code or the TX code. In the RX case, we'll probably wind up mapping
* at most one segment. For the TX case, there could be any number of
* segments since TX packets may span multiple mbufs. In either case,
* if the number of segments is larger than the rl_maxsegs limit
* specified by the caller, we abort the mapping operation. Sadly,
* whoever designed the buffer mapping API did not provide a way to
* return an error from here, so we have to fake it a bit.
*/
static void
re_dma_map_desc(arg, segs, nseg, mapsize, error)
void *arg;
bus_dma_segment_t *segs;
int nseg;
bus_size_t mapsize;
int error;
{
struct rl_dmaload_arg *ctx;
struct rl_desc *d = NULL;
int i = 0, idx;
if (error)
return;
ctx = arg;
/* Signal error to caller if there's too many segments */
if (nseg > ctx->rl_maxsegs) {
ctx->rl_maxsegs = 0;
return;
}
/*
* Map the segment array into descriptors. Note that we set the
* start-of-frame and end-of-frame markers for either TX or RX, but
* they really only have meaning in the TX case. (In the RX case,
* it's the chip that tells us where packets begin and end.)
* We also keep track of the end of the ring and set the
* end-of-ring bits as needed, and we set the ownership bits
* in all except the very first descriptor. (The caller will
* set this descriptor later when it start transmission or
* reception.)
*/
idx = ctx->rl_idx;
for (;;) {
u_int32_t cmdstat;
d = &ctx->rl_ring[idx];
if (le32toh(d->rl_cmdstat) & RL_RDESC_STAT_OWN) {
ctx->rl_maxsegs = 0;
return;
}
cmdstat = segs[i].ds_len;
d->rl_bufaddr_lo = htole32(RL_ADDR_LO(segs[i].ds_addr));
d->rl_bufaddr_hi = htole32(RL_ADDR_HI(segs[i].ds_addr));
if (i == 0)
cmdstat |= RL_TDESC_CMD_SOF;
else
cmdstat |= RL_TDESC_CMD_OWN;
if (idx == (RL_RX_DESC_CNT - 1))
cmdstat |= RL_TDESC_CMD_EOR;
d->rl_cmdstat = htole32(cmdstat | ctx->rl_flags);
i++;
if (i == nseg)
break;
RL_DESC_INC(idx);
}
d->rl_cmdstat |= htole32(RL_TDESC_CMD_EOF);
ctx->rl_maxsegs = nseg;
ctx->rl_idx = idx;
}
/*
* Map a single buffer address.
*/
static void
re_dma_map_addr(arg, segs, nseg, error)
void *arg;
bus_dma_segment_t *segs;
int nseg;
int error;
{
u_int32_t *addr;
if (error)
return;
KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg));
addr = arg;
*addr = segs->ds_addr;
}
static int
re_allocmem(dev, sc)
device_t dev;
struct rl_softc *sc;
{
int error;
int nseg;
int i;
/*
* Allocate map for RX mbufs.
*/
nseg = 32;
error = bus_dma_tag_create(sc->rl_parent_tag, ETHER_ALIGN, 0,
BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL,
NULL, MCLBYTES * nseg, nseg, MCLBYTES, BUS_DMA_ALLOCNOW,
NULL, NULL, &sc->rl_ldata.rl_mtag);
if (error) {
device_printf(dev, "could not allocate dma tag\n");
return (ENOMEM);
}
/*
* Allocate map for TX descriptor list.
*/
error = bus_dma_tag_create(sc->rl_parent_tag, RL_RING_ALIGN,
0, BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL,
NULL, RL_TX_LIST_SZ, 1, RL_TX_LIST_SZ, BUS_DMA_ALLOCNOW,
NULL, NULL, &sc->rl_ldata.rl_tx_list_tag);
if (error) {
device_printf(dev, "could not allocate dma tag\n");
return (ENOMEM);
}
/* Allocate DMA'able memory for the TX ring */
error = bus_dmamem_alloc(sc->rl_ldata.rl_tx_list_tag,
(void **)&sc->rl_ldata.rl_tx_list, BUS_DMA_NOWAIT | BUS_DMA_ZERO,
&sc->rl_ldata.rl_tx_list_map);
if (error)
return (ENOMEM);
/* Load the map for the TX ring. */
error = bus_dmamap_load(sc->rl_ldata.rl_tx_list_tag,
sc->rl_ldata.rl_tx_list_map, sc->rl_ldata.rl_tx_list,
RL_TX_LIST_SZ, re_dma_map_addr,
&sc->rl_ldata.rl_tx_list_addr, BUS_DMA_NOWAIT);
/* Create DMA maps for TX buffers */
for (i = 0; i < RL_TX_DESC_CNT; i++) {
error = bus_dmamap_create(sc->rl_ldata.rl_mtag, 0,
&sc->rl_ldata.rl_tx_dmamap[i]);
if (error) {
device_printf(dev, "can't create DMA map for TX\n");
return (ENOMEM);
}
}
/*
* Allocate map for RX descriptor list.
*/
error = bus_dma_tag_create(sc->rl_parent_tag, RL_RING_ALIGN,
0, BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL,
NULL, RL_RX_LIST_SZ, 1, RL_RX_LIST_SZ, BUS_DMA_ALLOCNOW,
NULL, NULL, &sc->rl_ldata.rl_rx_list_tag);
if (error) {
device_printf(dev, "could not allocate dma tag\n");
return (ENOMEM);
}
/* Allocate DMA'able memory for the RX ring */
error = bus_dmamem_alloc(sc->rl_ldata.rl_rx_list_tag,
(void **)&sc->rl_ldata.rl_rx_list, BUS_DMA_NOWAIT | BUS_DMA_ZERO,
&sc->rl_ldata.rl_rx_list_map);
if (error)
return (ENOMEM);
/* Load the map for the RX ring. */
error = bus_dmamap_load(sc->rl_ldata.rl_rx_list_tag,
sc->rl_ldata.rl_rx_list_map, sc->rl_ldata.rl_rx_list,
RL_RX_LIST_SZ, re_dma_map_addr,
&sc->rl_ldata.rl_rx_list_addr, BUS_DMA_NOWAIT);
/* Create DMA maps for RX buffers */
for (i = 0; i < RL_RX_DESC_CNT; i++) {
error = bus_dmamap_create(sc->rl_ldata.rl_mtag, 0,
&sc->rl_ldata.rl_rx_dmamap[i]);
if (error) {
device_printf(dev, "can't create DMA map for RX\n");
return (ENOMEM);
}
}
return (0);
}
/*
* Attach the interface. Allocate softc structures, do ifmedia
* setup and ethernet/BPF attach.
*/
static int
re_attach(dev)
device_t dev;
{
u_char eaddr[ETHER_ADDR_LEN];
u_int16_t as[3];
struct rl_softc *sc;
struct ifnet *ifp;
struct rl_hwrev *hw_rev;
int hwrev;
u_int16_t re_did = 0;
int unit, error = 0, rid, i;
sc = device_get_softc(dev);
unit = device_get_unit(dev);
mtx_init(&sc->rl_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
MTX_DEF);
/*
* Map control/status registers.
*/
pci_enable_busmaster(dev);
rid = RL_RID;
sc->rl_res = bus_alloc_resource_any(dev, RL_RES, &rid,
RF_ACTIVE);
if (sc->rl_res == NULL) {
printf ("re%d: couldn't map ports/memory\n", unit);
error = ENXIO;
goto fail;
}
sc->rl_btag = rman_get_bustag(sc->rl_res);
sc->rl_bhandle = rman_get_bushandle(sc->rl_res);
/* Allocate interrupt */
rid = 0;
sc->rl_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_SHAREABLE | RF_ACTIVE);
if (sc->rl_irq == NULL) {
printf("re%d: couldn't map interrupt\n", unit);
error = ENXIO;
goto fail;
}
/* Reset the adapter. */
RL_LOCK(sc);
re_reset(sc);
RL_UNLOCK(sc);
hw_rev = re_hwrevs;
hwrev = CSR_READ_4(sc, RL_TXCFG) & RL_TXCFG_HWREV;
while (hw_rev->rl_desc != NULL) {
if (hw_rev->rl_rev == hwrev) {
sc->rl_type = hw_rev->rl_type;
break;
}
hw_rev++;
}
if (sc->rl_type == RL_8169) {
/* Set RX length mask */
sc->rl_rxlenmask = RL_RDESC_STAT_GFRAGLEN;
/* Force station address autoload from the EEPROM */
CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_AUTOLOAD);
for (i = 0; i < RL_TIMEOUT; i++) {
if (!(CSR_READ_1(sc, RL_EECMD) & RL_EEMODE_AUTOLOAD))
break;
DELAY(100);
}
if (i == RL_TIMEOUT)
printf ("re%d: eeprom autoload timed out\n", unit);
for (i = 0; i < ETHER_ADDR_LEN; i++)
eaddr[i] = CSR_READ_1(sc, RL_IDR0 + i);
} else {
/* Set RX length mask */
sc->rl_rxlenmask = RL_RDESC_STAT_FRAGLEN;
sc->rl_eecmd_read = RL_EECMD_READ_6BIT;
re_read_eeprom(sc, (caddr_t)&re_did, 0, 1, 0);
if (re_did != 0x8129)
sc->rl_eecmd_read = RL_EECMD_READ_8BIT;
/*
* Get station address from the EEPROM.
*/
re_read_eeprom(sc, (caddr_t)as, RL_EE_EADDR, 3, 0);
for (i = 0; i < 3; i++) {
eaddr[(i * 2) + 0] = as[i] & 0xff;
eaddr[(i * 2) + 1] = as[i] >> 8;
}
}
sc->rl_unit = unit;
bcopy(eaddr, (char *)&sc->arpcom.ac_enaddr, ETHER_ADDR_LEN);
/*
* Allocate the parent bus DMA tag appropriate for PCI.
*/
#define RL_NSEG_NEW 32
error = bus_dma_tag_create(NULL, /* parent */
1, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR_32BIT,/* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
MAXBSIZE, RL_NSEG_NEW, /* maxsize, nsegments */
BUS_SPACE_MAXSIZE_32BIT,/* maxsegsize */
BUS_DMA_ALLOCNOW, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->rl_parent_tag);
if (error)
goto fail;
error = re_allocmem(dev, sc);
if (error)
goto fail;
/* Do MII setup */
if (mii_phy_probe(dev, &sc->rl_miibus,
re_ifmedia_upd, re_ifmedia_sts)) {
printf("re%d: MII without any phy!\n", sc->rl_unit);
error = ENXIO;
goto fail;
}
ifp = &sc->arpcom.ac_if;
ifp->if_softc = sc;
if_initname(ifp, device_get_name(dev), device_get_unit(dev));
ifp->if_mtu = ETHERMTU;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_ioctl = re_ioctl;
ifp->if_capabilities = IFCAP_VLAN_MTU;
ifp->if_start = re_start;
ifp->if_hwassist = RE_CSUM_FEATURES;
ifp->if_capabilities |= IFCAP_HWCSUM|IFCAP_VLAN_HWTAGGING;
#ifdef DEVICE_POLLING
ifp->if_capabilities |= IFCAP_POLLING;
#endif
ifp->if_watchdog = re_watchdog;
ifp->if_init = re_init;
if (sc->rl_type == RL_8169)
ifp->if_baudrate = 1000000000;
else
ifp->if_baudrate = 100000000;
ifp->if_snd.ifq_maxlen = RL_IFQ_MAXLEN;
ifp->if_capenable = ifp->if_capabilities;
callout_handle_init(&sc->rl_stat_ch);
/*
* Call MI attach routine.
*/
ether_ifattach(ifp, eaddr);
/* Perform hardware diagnostic. */
error = re_diag(sc);
if (error) {
printf("re%d: attach aborted due to hardware diag failure\n",
unit);
ether_ifdetach(ifp);
goto fail;
}
/* Hook interrupt last to avoid having to lock softc */
error = bus_setup_intr(dev, sc->rl_irq, INTR_TYPE_NET | INTR_MPSAFE,
re_intr, sc, &sc->rl_intrhand);
if (error) {
printf("re%d: couldn't set up irq\n", unit);
ether_ifdetach(ifp);
}
fail:
if (error)
re_detach(dev);
return (error);
}
/*
* Shutdown hardware and free up resources. This can be called any
* time after the mutex has been initialized. It is called in both
* the error case in attach and the normal detach case so it needs
* to be careful about only freeing resources that have actually been
* allocated.
*/
static int
re_detach(dev)
device_t dev;
{
struct rl_softc *sc;
struct ifnet *ifp;
int i;
int attached;
sc = device_get_softc(dev);
ifp = &sc->arpcom.ac_if;
KASSERT(mtx_initialized(&sc->rl_mtx), ("re mutex not initialized"));
attached = device_is_attached(dev);
/* These should only be active if attach succeeded */
if (attached)
ether_ifdetach(ifp);
RL_LOCK(sc);
#if 0
sc->suspended = 1;
#endif
/* These should only be active if attach succeeded */
if (attached) {
re_stop(sc);
/*
* Force off the IFF_UP flag here, in case someone
* still had a BPF descriptor attached to this
* interface. If they do, ether_ifdetach() will cause
* the BPF code to try and clear the promisc mode
* flag, which will bubble down to re_ioctl(),
* which will try to call re_init() again. This will
* turn the NIC back on and restart the MII ticker,
* which will panic the system when the kernel tries
* to invoke the re_tick() function that isn't there
* anymore.
*/
ifp->if_flags &= ~IFF_UP;
ether_ifdetach(ifp);
}
if (sc->rl_miibus)
device_delete_child(dev, sc->rl_miibus);
bus_generic_detach(dev);
/*
* The rest is resource deallocation, so we should already be
* stopped here.
*/
RL_UNLOCK(sc);
if (sc->rl_intrhand)
bus_teardown_intr(dev, sc->rl_irq, sc->rl_intrhand);
if (sc->rl_irq)
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->rl_irq);
if (sc->rl_res)
bus_release_resource(dev, RL_RES, RL_RID, sc->rl_res);
/* Unload and free the RX DMA ring memory and map */
if (sc->rl_ldata.rl_rx_list_tag) {
bus_dmamap_unload(sc->rl_ldata.rl_rx_list_tag,
sc->rl_ldata.rl_rx_list_map);
bus_dmamem_free(sc->rl_ldata.rl_rx_list_tag,
sc->rl_ldata.rl_rx_list,
sc->rl_ldata.rl_rx_list_map);
bus_dma_tag_destroy(sc->rl_ldata.rl_rx_list_tag);
}
/* Unload and free the TX DMA ring memory and map */
if (sc->rl_ldata.rl_tx_list_tag) {
bus_dmamap_unload(sc->rl_ldata.rl_tx_list_tag,
sc->rl_ldata.rl_tx_list_map);
bus_dmamem_free(sc->rl_ldata.rl_tx_list_tag,
sc->rl_ldata.rl_tx_list,
sc->rl_ldata.rl_tx_list_map);
bus_dma_tag_destroy(sc->rl_ldata.rl_tx_list_tag);
}
/* Destroy all the RX and TX buffer maps */
if (sc->rl_ldata.rl_mtag) {
for (i = 0; i < RL_TX_DESC_CNT; i++)
bus_dmamap_destroy(sc->rl_ldata.rl_mtag,
sc->rl_ldata.rl_tx_dmamap[i]);
for (i = 0; i < RL_RX_DESC_CNT; i++)
bus_dmamap_destroy(sc->rl_ldata.rl_mtag,
sc->rl_ldata.rl_rx_dmamap[i]);
bus_dma_tag_destroy(sc->rl_ldata.rl_mtag);
}
/* Unload and free the stats buffer and map */
if (sc->rl_ldata.rl_stag) {
bus_dmamap_unload(sc->rl_ldata.rl_stag,
sc->rl_ldata.rl_rx_list_map);
bus_dmamem_free(sc->rl_ldata.rl_stag,
sc->rl_ldata.rl_stats,
sc->rl_ldata.rl_smap);
bus_dma_tag_destroy(sc->rl_ldata.rl_stag);
}
if (sc->rl_parent_tag)
bus_dma_tag_destroy(sc->rl_parent_tag);
mtx_destroy(&sc->rl_mtx);
return (0);
}
static int
re_newbuf(sc, idx, m)
struct rl_softc *sc;
int idx;
struct mbuf *m;
{
struct rl_dmaload_arg arg;
struct mbuf *n = NULL;
int error;
if (m == NULL) {
n = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
if (n == NULL)
return (ENOBUFS);
m = n;
} else
m->m_data = m->m_ext.ext_buf;
m->m_len = m->m_pkthdr.len = MCLBYTES;
#ifdef RE_FIXUP_RX
/*
* This is part of an evil trick to deal with non-x86 platforms.
* The RealTek chip requires RX buffers to be aligned on 64-bit
* boundaries, but that will hose non-x86 machines. To get around
* this, we leave some empty space at the start of each buffer
* and for non-x86 hosts, we copy the buffer back six bytes
* to achieve word alignment. This is slightly more efficient
* than allocating a new buffer, copying the contents, and
* discarding the old buffer.
*/
m_adj(m, RE_ETHER_ALIGN);
#endif
arg.sc = sc;
arg.rl_idx = idx;
arg.rl_maxsegs = 1;
arg.rl_flags = 0;
arg.rl_ring = sc->rl_ldata.rl_rx_list;
error = bus_dmamap_load_mbuf(sc->rl_ldata.rl_mtag,
sc->rl_ldata.rl_rx_dmamap[idx], m, re_dma_map_desc,
&arg, BUS_DMA_NOWAIT);
if (error || arg.rl_maxsegs != 1) {
if (n != NULL)
m_freem(n);
return (ENOMEM);
}
sc->rl_ldata.rl_rx_list[idx].rl_cmdstat |= htole32(RL_RDESC_CMD_OWN);
sc->rl_ldata.rl_rx_mbuf[idx] = m;
bus_dmamap_sync(sc->rl_ldata.rl_mtag,
sc->rl_ldata.rl_rx_dmamap[idx],
BUS_DMASYNC_PREREAD);
return (0);
}
#ifdef RE_FIXUP_RX
static __inline void
re_fixup_rx(m)
struct mbuf *m;
{
int i;
uint16_t *src, *dst;
src = mtod(m, uint16_t *);
dst = src - (RE_ETHER_ALIGN - ETHER_ALIGN) / sizeof *src;
for (i = 0; i < (m->m_len / sizeof(uint16_t) + 1); i++)
*dst++ = *src++;
m->m_data -= RE_ETHER_ALIGN - ETHER_ALIGN;
return;
}
#endif
static int
re_tx_list_init(sc)
struct rl_softc *sc;
{
RL_LOCK_ASSERT(sc);
bzero ((char *)sc->rl_ldata.rl_tx_list, RL_TX_LIST_SZ);
bzero ((char *)&sc->rl_ldata.rl_tx_mbuf,
(RL_TX_DESC_CNT * sizeof(struct mbuf *)));
bus_dmamap_sync(sc->rl_ldata.rl_tx_list_tag,
sc->rl_ldata.rl_tx_list_map, BUS_DMASYNC_PREWRITE);
sc->rl_ldata.rl_tx_prodidx = 0;
sc->rl_ldata.rl_tx_considx = 0;
sc->rl_ldata.rl_tx_free = RL_TX_DESC_CNT;
return (0);
}
static int
re_rx_list_init(sc)
struct rl_softc *sc;
{
int i;
bzero ((char *)sc->rl_ldata.rl_rx_list, RL_RX_LIST_SZ);
bzero ((char *)&sc->rl_ldata.rl_rx_mbuf,
(RL_RX_DESC_CNT * sizeof(struct mbuf *)));
for (i = 0; i < RL_RX_DESC_CNT; i++) {
if (re_newbuf(sc, i, NULL) == ENOBUFS)
return (ENOBUFS);
}
/* Flush the RX descriptors */
bus_dmamap_sync(sc->rl_ldata.rl_rx_list_tag,
sc->rl_ldata.rl_rx_list_map,
BUS_DMASYNC_PREWRITE|BUS_DMASYNC_PREREAD);
sc->rl_ldata.rl_rx_prodidx = 0;
sc->rl_head = sc->rl_tail = NULL;
return (0);
}
/*
* RX handler for C+ and 8169. For the gigE chips, we support
* the reception of jumbo frames that have been fragmented
* across multiple 2K mbuf cluster buffers.
*/
static void
re_rxeof(sc)
struct rl_softc *sc;
{
struct mbuf *m;
struct ifnet *ifp;
int i, total_len;
struct rl_desc *cur_rx;
u_int32_t rxstat, rxvlan;
RL_LOCK_ASSERT(sc);
ifp = &sc->arpcom.ac_if;
i = sc->rl_ldata.rl_rx_prodidx;
/* Invalidate the descriptor memory */
bus_dmamap_sync(sc->rl_ldata.rl_rx_list_tag,
sc->rl_ldata.rl_rx_list_map,
BUS_DMASYNC_POSTREAD);
while (!RL_OWN(&sc->rl_ldata.rl_rx_list[i])) {
cur_rx = &sc->rl_ldata.rl_rx_list[i];
m = sc->rl_ldata.rl_rx_mbuf[i];
total_len = RL_RXBYTES(cur_rx);
rxstat = le32toh(cur_rx->rl_cmdstat);
rxvlan = le32toh(cur_rx->rl_vlanctl);
/* Invalidate the RX mbuf and unload its map */
bus_dmamap_sync(sc->rl_ldata.rl_mtag,
sc->rl_ldata.rl_rx_dmamap[i],
BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->rl_ldata.rl_mtag,
sc->rl_ldata.rl_rx_dmamap[i]);
if (!(rxstat & RL_RDESC_STAT_EOF)) {
m->m_len = RE_RX_DESC_BUFLEN;
if (sc->rl_head == NULL)
sc->rl_head = sc->rl_tail = m;
else {
m->m_flags &= ~M_PKTHDR;
sc->rl_tail->m_next = m;
sc->rl_tail = m;
}
re_newbuf(sc, i, NULL);
RL_DESC_INC(i);
continue;
}
/*
* NOTE: for the 8139C+, the frame length field
* is always 12 bits in size, but for the gigE chips,
* it is 13 bits (since the max RX frame length is 16K).
* Unfortunately, all 32 bits in the status word
* were already used, so to make room for the extra
* length bit, RealTek took out the 'frame alignment
* error' bit and shifted the other status bits
* over one slot. The OWN, EOR, FS and LS bits are
* still in the same places. We have already extracted
* the frame length and checked the OWN bit, so rather
* than using an alternate bit mapping, we shift the
* status bits one space to the right so we can evaluate
* them using the 8169 status as though it was in the
* same format as that of the 8139C+.
*/
if (sc->rl_type == RL_8169)
rxstat >>= 1;
/*
* if total_len > 2^13-1, both _RXERRSUM and _GIANT will be
* set, but if CRC is clear, it will still be a valid frame.
*/
if (rxstat & RL_RDESC_STAT_RXERRSUM && !(total_len > 8191 &&
(rxstat & RL_RDESC_STAT_ERRS) == RL_RDESC_STAT_GIANT)) {
ifp->if_ierrors++;
/*
* If this is part of a multi-fragment packet,
* discard all the pieces.
*/
if (sc->rl_head != NULL) {
m_freem(sc->rl_head);
sc->rl_head = sc->rl_tail = NULL;
}
re_newbuf(sc, i, m);
RL_DESC_INC(i);
continue;
}
/*
* If allocating a replacement mbuf fails,
* reload the current one.
*/
if (re_newbuf(sc, i, NULL)) {
ifp->if_ierrors++;
if (sc->rl_head != NULL) {
m_freem(sc->rl_head);
sc->rl_head = sc->rl_tail = NULL;
}
re_newbuf(sc, i, m);
RL_DESC_INC(i);
continue;
}
RL_DESC_INC(i);
if (sc->rl_head != NULL) {
m->m_len = total_len % RE_RX_DESC_BUFLEN;
if (m->m_len == 0)
m->m_len = RE_RX_DESC_BUFLEN;
/*
* Special case: if there's 4 bytes or less
* in this buffer, the mbuf can be discarded:
* the last 4 bytes is the CRC, which we don't
* care about anyway.
*/
if (m->m_len <= ETHER_CRC_LEN) {
sc->rl_tail->m_len -=
(ETHER_CRC_LEN - m->m_len);
m_freem(m);
} else {
m->m_len -= ETHER_CRC_LEN;
m->m_flags &= ~M_PKTHDR;
sc->rl_tail->m_next = m;
}
m = sc->rl_head;
sc->rl_head = sc->rl_tail = NULL;
m->m_pkthdr.len = total_len - ETHER_CRC_LEN;
} else
m->m_pkthdr.len = m->m_len =
(total_len - ETHER_CRC_LEN);
#ifdef RE_FIXUP_RX
re_fixup_rx(m);
#endif
ifp->if_ipackets++;
m->m_pkthdr.rcvif = ifp;
/* Do RX checksumming if enabled */
if (ifp->if_capenable & IFCAP_RXCSUM) {
/* Check IP header checksum */
if (rxstat & RL_RDESC_STAT_PROTOID)
m->m_pkthdr.csum_flags |= CSUM_IP_CHECKED;
if (!(rxstat & RL_RDESC_STAT_IPSUMBAD))
m->m_pkthdr.csum_flags |= CSUM_IP_VALID;
/* Check TCP/UDP checksum */
if ((RL_TCPPKT(rxstat) &&
!(rxstat & RL_RDESC_STAT_TCPSUMBAD)) ||
(RL_UDPPKT(rxstat) &&
!(rxstat & RL_RDESC_STAT_UDPSUMBAD))) {
m->m_pkthdr.csum_flags |=
CSUM_DATA_VALID|CSUM_PSEUDO_HDR;
m->m_pkthdr.csum_data = 0xffff;
}
}
if (rxvlan & RL_RDESC_VLANCTL_TAG)
VLAN_INPUT_TAG(ifp, m,
ntohs((rxvlan & RL_RDESC_VLANCTL_DATA)), continue);
RL_UNLOCK(sc);
(*ifp->if_input)(ifp, m);
RL_LOCK(sc);
}
/* Flush the RX DMA ring */
bus_dmamap_sync(sc->rl_ldata.rl_rx_list_tag,
sc->rl_ldata.rl_rx_list_map,
BUS_DMASYNC_PREWRITE|BUS_DMASYNC_PREREAD);
sc->rl_ldata.rl_rx_prodidx = i;
}
static void
re_txeof(sc)
struct rl_softc *sc;
{
struct ifnet *ifp;
u_int32_t txstat;
int idx;
ifp = &sc->arpcom.ac_if;
idx = sc->rl_ldata.rl_tx_considx;
/* Invalidate the TX descriptor list */
bus_dmamap_sync(sc->rl_ldata.rl_tx_list_tag,
sc->rl_ldata.rl_tx_list_map,
BUS_DMASYNC_POSTREAD);
while (idx != sc->rl_ldata.rl_tx_prodidx) {
txstat = le32toh(sc->rl_ldata.rl_tx_list[idx].rl_cmdstat);
if (txstat & RL_TDESC_CMD_OWN)
break;
/*
* We only stash mbufs in the last descriptor
* in a fragment chain, which also happens to
* be the only place where the TX status bits
* are valid.
*/
if (txstat & RL_TDESC_CMD_EOF) {
m_freem(sc->rl_ldata.rl_tx_mbuf[idx]);
sc->rl_ldata.rl_tx_mbuf[idx] = NULL;
bus_dmamap_unload(sc->rl_ldata.rl_mtag,
sc->rl_ldata.rl_tx_dmamap[idx]);
if (txstat & (RL_TDESC_STAT_EXCESSCOL|
RL_TDESC_STAT_COLCNT))
ifp->if_collisions++;
if (txstat & RL_TDESC_STAT_TXERRSUM)
ifp->if_oerrors++;
else
ifp->if_opackets++;
}
sc->rl_ldata.rl_tx_free++;
RL_DESC_INC(idx);
}
/* No changes made to the TX ring, so no flush needed */
if (idx != sc->rl_ldata.rl_tx_considx) {
sc->rl_ldata.rl_tx_considx = idx;
ifp->if_flags &= ~IFF_OACTIVE;
ifp->if_timer = 0;
}
/*
* If not all descriptors have been released reaped yet,
* reload the timer so that we will eventually get another
* interrupt that will cause us to re-enter this routine.
* This is done in case the transmitter has gone idle.
*/
if (sc->rl_ldata.rl_tx_free != RL_TX_DESC_CNT)
CSR_WRITE_4(sc, RL_TIMERCNT, 1);
}
static void
re_tick(xsc)
void *xsc;
{
struct rl_softc *sc;
sc = xsc;
RL_LOCK(sc);
re_tick_locked(sc);
RL_UNLOCK(sc);
}
static void
re_tick_locked(sc)
struct rl_softc *sc;
{
struct mii_data *mii;
RL_LOCK_ASSERT(sc);
mii = device_get_softc(sc->rl_miibus);
mii_tick(mii);
sc->rl_stat_ch = timeout(re_tick, sc, hz);
}
#ifdef DEVICE_POLLING
static void
re_poll(struct ifnet *ifp, enum poll_cmd cmd, int count)
{
struct rl_softc *sc = ifp->if_softc;
RL_LOCK(sc);
re_poll_locked(ifp, cmd, count);
RL_UNLOCK(sc);
}
static void
re_poll_locked(struct ifnet *ifp, enum poll_cmd cmd, int count)
{
struct rl_softc *sc = ifp->if_softc;
RL_LOCK_ASSERT(sc);
if (!(ifp->if_capenable & IFCAP_POLLING)) {
ether_poll_deregister(ifp);
cmd = POLL_DEREGISTER;
}
if (cmd == POLL_DEREGISTER) { /* final call, enable interrupts */
CSR_WRITE_2(sc, RL_IMR, RL_INTRS_CPLUS);
return;
}
sc->rxcycles = count;
re_rxeof(sc);
re_txeof(sc);
if (ifp->if_snd.ifq_head != NULL)
re_start_locked(ifp);
if (cmd == POLL_AND_CHECK_STATUS) { /* also check status register */
u_int16_t status;
status = CSR_READ_2(sc, RL_ISR);
if (status == 0xffff)
return;
if (status)
CSR_WRITE_2(sc, RL_ISR, status);
/*
* XXX check behaviour on receiver stalls.
*/
if (status & RL_ISR_SYSTEM_ERR) {
re_reset(sc);
re_init_locked(sc);
}
}
}
#endif /* DEVICE_POLLING */
static void
re_intr(arg)
void *arg;
{
struct rl_softc *sc;
struct ifnet *ifp;
u_int16_t status;
sc = arg;
RL_LOCK(sc);
ifp = &sc->arpcom.ac_if;
if (sc->suspended || !(ifp->if_flags & IFF_UP))
goto done_locked;
#ifdef DEVICE_POLLING
if (ifp->if_flags & IFF_POLLING)
goto done_locked;
if ((ifp->if_capenable & IFCAP_POLLING) &&
ether_poll_register(re_poll, ifp)) { /* ok, disable interrupts */
CSR_WRITE_2(sc, RL_IMR, 0x0000);
re_poll_locked(ifp, 0, 1);
goto done_locked;
}
#endif /* DEVICE_POLLING */
for (;;) {
status = CSR_READ_2(sc, RL_ISR);
/* If the card has gone away the read returns 0xffff. */
if (status == 0xffff)
break;
if (status)
CSR_WRITE_2(sc, RL_ISR, status);
if ((status & RL_INTRS_CPLUS) == 0)
break;
if ((status & RL_ISR_RX_OK) ||
(status & RL_ISR_RX_ERR))
re_rxeof(sc);
if ((status & RL_ISR_TIMEOUT_EXPIRED) ||
(status & RL_ISR_TX_ERR) ||
(status & RL_ISR_TX_DESC_UNAVAIL))
re_txeof(sc);
if (status & RL_ISR_SYSTEM_ERR) {
re_reset(sc);
re_init_locked(sc);
}
if (status & RL_ISR_LINKCHG) {
untimeout(re_tick, sc, sc->rl_stat_ch);
re_tick_locked(sc);
}
}
if (ifp->if_snd.ifq_head != NULL)
re_start_locked(ifp);
done_locked:
RL_UNLOCK(sc);
}
static int
re_encap(sc, m_head, idx)
struct rl_softc *sc;
struct mbuf **m_head;
int *idx;
{
struct mbuf *m_new = NULL;
struct rl_dmaload_arg arg;
bus_dmamap_t map;
int error;
struct m_tag *mtag;
RL_LOCK_ASSERT(sc);
if (sc->rl_ldata.rl_tx_free <= 4)
return (EFBIG);
/*
* Set up checksum offload. Note: checksum offload bits must
* appear in all descriptors of a multi-descriptor transmit
* attempt. This is according to testing done with an 8169
* chip. This is a requirement.
*/
arg.rl_flags = 0;
if ((*m_head)->m_pkthdr.csum_flags & CSUM_IP)
arg.rl_flags |= RL_TDESC_CMD_IPCSUM;
if ((*m_head)->m_pkthdr.csum_flags & CSUM_TCP)
arg.rl_flags |= RL_TDESC_CMD_TCPCSUM;
if ((*m_head)->m_pkthdr.csum_flags & CSUM_UDP)
arg.rl_flags |= RL_TDESC_CMD_UDPCSUM;
arg.sc = sc;
arg.rl_idx = *idx;
arg.rl_maxsegs = sc->rl_ldata.rl_tx_free;
if (arg.rl_maxsegs > 4)
arg.rl_maxsegs -= 4;
arg.rl_ring = sc->rl_ldata.rl_tx_list;
map = sc->rl_ldata.rl_tx_dmamap[*idx];
error = bus_dmamap_load_mbuf(sc->rl_ldata.rl_mtag, map,
*m_head, re_dma_map_desc, &arg, BUS_DMA_NOWAIT);
if (error && error != EFBIG) {
printf("re%d: can't map mbuf (error %d)\n", sc->rl_unit, error);
return (ENOBUFS);
}
/* Too many segments to map, coalesce into a single mbuf */
if (error || arg.rl_maxsegs == 0) {
m_new = m_defrag(*m_head, M_DONTWAIT);
if (m_new == NULL)
return (ENOBUFS);
else
*m_head = m_new;
arg.sc = sc;
arg.rl_idx = *idx;
arg.rl_maxsegs = sc->rl_ldata.rl_tx_free;
arg.rl_ring = sc->rl_ldata.rl_tx_list;
error = bus_dmamap_load_mbuf(sc->rl_ldata.rl_mtag, map,
*m_head, re_dma_map_desc, &arg, BUS_DMA_NOWAIT);
if (error) {
printf("re%d: can't map mbuf (error %d)\n",
sc->rl_unit, error);
return (EFBIG);
}
}
/*
* Insure that the map for this transmission
* is placed at the array index of the last descriptor
* in this chain. (Swap last and first dmamaps.)
*/
sc->rl_ldata.rl_tx_dmamap[*idx] =
sc->rl_ldata.rl_tx_dmamap[arg.rl_idx];
sc->rl_ldata.rl_tx_dmamap[arg.rl_idx] = map;
sc->rl_ldata.rl_tx_mbuf[arg.rl_idx] = *m_head;
sc->rl_ldata.rl_tx_free -= arg.rl_maxsegs;
/*
* Set up hardware VLAN tagging. Note: vlan tag info must
* appear in the first descriptor of a multi-descriptor
* transmission attempt.
*/
mtag = VLAN_OUTPUT_TAG(&sc->arpcom.ac_if, *m_head);
if (mtag != NULL)
sc->rl_ldata.rl_tx_list[*idx].rl_vlanctl =
htole32(htons(VLAN_TAG_VALUE(mtag)) | RL_TDESC_VLANCTL_TAG);
/* Transfer ownership of packet to the chip. */
sc->rl_ldata.rl_tx_list[arg.rl_idx].rl_cmdstat |=
htole32(RL_TDESC_CMD_OWN);
if (*idx != arg.rl_idx)
sc->rl_ldata.rl_tx_list[*idx].rl_cmdstat |=
htole32(RL_TDESC_CMD_OWN);
RL_DESC_INC(arg.rl_idx);
*idx = arg.rl_idx;
return (0);
}
static void
re_start(ifp)
struct ifnet *ifp;
{
struct rl_softc *sc;
sc = ifp->if_softc;
RL_LOCK(sc);
re_start_locked(ifp);
RL_UNLOCK(sc);
}
/*
* Main transmit routine for C+ and gigE NICs.
*/
static void
re_start_locked(ifp)
struct ifnet *ifp;
{
struct rl_softc *sc;
struct mbuf *m_head = NULL;
int idx;
sc = ifp->if_softc;
RL_LOCK_ASSERT(sc);
idx = sc->rl_ldata.rl_tx_prodidx;
while (sc->rl_ldata.rl_tx_mbuf[idx] == NULL) {
IF_DEQUEUE(&ifp->if_snd, m_head);
if (m_head == NULL)
break;
if (re_encap(sc, &m_head, &idx)) {
IF_PREPEND(&ifp->if_snd, m_head);
ifp->if_flags |= IFF_OACTIVE;
break;
}
/*
* If there's a BPF listener, bounce a copy of this frame
* to him.
*/
BPF_MTAP(ifp, m_head);
}
/* Flush the TX descriptors */
bus_dmamap_sync(sc->rl_ldata.rl_tx_list_tag,
sc->rl_ldata.rl_tx_list_map,
BUS_DMASYNC_PREWRITE|BUS_DMASYNC_PREREAD);
sc->rl_ldata.rl_tx_prodidx = idx;
/*
* RealTek put the TX poll request register in a different
* location on the 8169 gigE chip. I don't know why.
*/
if (sc->rl_type == RL_8169)
CSR_WRITE_2(sc, RL_GTXSTART, RL_TXSTART_START);
else
CSR_WRITE_2(sc, RL_TXSTART, RL_TXSTART_START);
/*
* Use the countdown timer for interrupt moderation.
* 'TX done' interrupts are disabled. Instead, we reset the
* countdown timer, which will begin counting until it hits
* the value in the TIMERINT register, and then trigger an
* interrupt. Each time we write to the TIMERCNT register,
* the timer count is reset to 0.
*/
CSR_WRITE_4(sc, RL_TIMERCNT, 1);
/*
* Set a timeout in case the chip goes out to lunch.
*/
ifp->if_timer = 5;
}
static void
re_init(xsc)
void *xsc;
{
struct rl_softc *sc = xsc;
RL_LOCK(sc);
re_init_locked(sc);
RL_UNLOCK(sc);
}
static void
re_init_locked(sc)
struct rl_softc *sc;
{
struct ifnet *ifp = &sc->arpcom.ac_if;
struct mii_data *mii;
u_int32_t rxcfg = 0;
RL_LOCK_ASSERT(sc);
mii = device_get_softc(sc->rl_miibus);
/*
* Cancel pending I/O and free all RX/TX buffers.
*/
re_stop(sc);
/*
* Enable C+ RX and TX mode, as well as VLAN stripping and
* RX checksum offload. We must configure the C+ register
* before all others.
*/
CSR_WRITE_2(sc, RL_CPLUS_CMD, RL_CPLUSCMD_RXENB|
RL_CPLUSCMD_TXENB|RL_CPLUSCMD_PCI_MRW|
RL_CPLUSCMD_VLANSTRIP|
(ifp->if_capenable & IFCAP_RXCSUM ?
RL_CPLUSCMD_RXCSUM_ENB : 0));
/*
* Init our MAC address. Even though the chipset
* documentation doesn't mention it, we need to enter "Config
* register write enable" mode to modify the ID registers.
*/
CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_WRITECFG);
CSR_WRITE_STREAM_4(sc, RL_IDR0,
*(u_int32_t *)(&sc->arpcom.ac_enaddr[0]));
CSR_WRITE_STREAM_4(sc, RL_IDR4,
*(u_int32_t *)(&sc->arpcom.ac_enaddr[4]));
CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_OFF);
/*
* For C+ mode, initialize the RX descriptors and mbufs.
*/
re_rx_list_init(sc);
re_tx_list_init(sc);
/*
* Enable transmit and receive.
*/
CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_TX_ENB|RL_CMD_RX_ENB);
/*
* Set the initial TX and RX configuration.
*/
if (sc->rl_testmode) {
if (sc->rl_type == RL_8169)
CSR_WRITE_4(sc, RL_TXCFG,
RL_TXCFG_CONFIG|RL_LOOPTEST_ON);
else
CSR_WRITE_4(sc, RL_TXCFG,
RL_TXCFG_CONFIG|RL_LOOPTEST_ON_CPLUS);
} else
CSR_WRITE_4(sc, RL_TXCFG, RL_TXCFG_CONFIG);
CSR_WRITE_4(sc, RL_RXCFG, RL_RXCFG_CONFIG);
/* Set the individual bit to receive frames for this host only. */
rxcfg = CSR_READ_4(sc, RL_RXCFG);
rxcfg |= RL_RXCFG_RX_INDIV;
/* If we want promiscuous mode, set the allframes bit. */
if (ifp->if_flags & IFF_PROMISC)
rxcfg |= RL_RXCFG_RX_ALLPHYS;
else
rxcfg &= ~RL_RXCFG_RX_ALLPHYS;
CSR_WRITE_4(sc, RL_RXCFG, rxcfg);
/*
* Set capture broadcast bit to capture broadcast frames.
*/
if (ifp->if_flags & IFF_BROADCAST)
rxcfg |= RL_RXCFG_RX_BROAD;
else
rxcfg &= ~RL_RXCFG_RX_BROAD;
CSR_WRITE_4(sc, RL_RXCFG, rxcfg);
/*
* Program the multicast filter, if necessary.
*/
re_setmulti(sc);
#ifdef DEVICE_POLLING
/*
* Disable interrupts if we are polling.
*/
if (ifp->if_flags & IFF_POLLING)
CSR_WRITE_2(sc, RL_IMR, 0);
else /* otherwise ... */
#endif /* DEVICE_POLLING */
/*
* Enable interrupts.
*/
if (sc->rl_testmode)
CSR_WRITE_2(sc, RL_IMR, 0);
else
CSR_WRITE_2(sc, RL_IMR, RL_INTRS_CPLUS);
/* Set initial TX threshold */
sc->rl_txthresh = RL_TX_THRESH_INIT;
/* Start RX/TX process. */
CSR_WRITE_4(sc, RL_MISSEDPKT, 0);
#ifdef notdef
/* Enable receiver and transmitter. */
CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_TX_ENB|RL_CMD_RX_ENB);
#endif
/*
* Load the addresses of the RX and TX lists into the chip.
*/
CSR_WRITE_4(sc, RL_RXLIST_ADDR_HI,
RL_ADDR_HI(sc->rl_ldata.rl_rx_list_addr));
CSR_WRITE_4(sc, RL_RXLIST_ADDR_LO,
RL_ADDR_LO(sc->rl_ldata.rl_rx_list_addr));
CSR_WRITE_4(sc, RL_TXLIST_ADDR_HI,
RL_ADDR_HI(sc->rl_ldata.rl_tx_list_addr));
CSR_WRITE_4(sc, RL_TXLIST_ADDR_LO,
RL_ADDR_LO(sc->rl_ldata.rl_tx_list_addr));
CSR_WRITE_1(sc, RL_EARLY_TX_THRESH, 16);
/*
* Initialize the timer interrupt register so that
* a timer interrupt will be generated once the timer
* reaches a certain number of ticks. The timer is
* reloaded on each transmit. This gives us TX interrupt
* moderation, which dramatically improves TX frame rate.
*/
if (sc->rl_type == RL_8169)
CSR_WRITE_4(sc, RL_TIMERINT_8169, 0x800);
else
CSR_WRITE_4(sc, RL_TIMERINT, 0x400);
/*
* For 8169 gigE NICs, set the max allowed RX packet
* size so we can receive jumbo frames.
*/
if (sc->rl_type == RL_8169)
CSR_WRITE_2(sc, RL_MAXRXPKTLEN, 16383);
if (sc->rl_testmode)
return;
mii_mediachg(mii);
CSR_WRITE_1(sc, RL_CFG1, RL_CFG1_DRVLOAD|RL_CFG1_FULLDUPLEX);
ifp->if_flags |= IFF_RUNNING;
ifp->if_flags &= ~IFF_OACTIVE;
sc->rl_stat_ch = timeout(re_tick, sc, hz);
}
/*
* Set media options.
*/
static int
re_ifmedia_upd(ifp)
struct ifnet *ifp;
{
struct rl_softc *sc;
struct mii_data *mii;
sc = ifp->if_softc;
mii = device_get_softc(sc->rl_miibus);
mii_mediachg(mii);
return (0);
}
/*
* Report current media status.
*/
static void
re_ifmedia_sts(ifp, ifmr)
struct ifnet *ifp;
struct ifmediareq *ifmr;
{
struct rl_softc *sc;
struct mii_data *mii;
sc = ifp->if_softc;
mii = device_get_softc(sc->rl_miibus);
mii_pollstat(mii);
ifmr->ifm_active = mii->mii_media_active;
ifmr->ifm_status = mii->mii_media_status;
}
static int
re_ioctl(ifp, command, data)
struct ifnet *ifp;
u_long command;
caddr_t data;
{
struct rl_softc *sc = ifp->if_softc;
struct ifreq *ifr = (struct ifreq *) data;
struct mii_data *mii;
int error = 0;
switch (command) {
case SIOCSIFMTU:
if (ifr->ifr_mtu > RL_JUMBO_MTU)
error = EINVAL;
ifp->if_mtu = ifr->ifr_mtu;
break;
case SIOCSIFFLAGS:
RL_LOCK(sc);
if (ifp->if_flags & IFF_UP)
re_init_locked(sc);
else if (ifp->if_flags & IFF_RUNNING)
re_stop(sc);
RL_UNLOCK(sc);
error = 0;
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
RL_LOCK(sc);
re_setmulti(sc);
RL_UNLOCK(sc);
error = 0;
break;
case SIOCGIFMEDIA:
case SIOCSIFMEDIA:
mii = device_get_softc(sc->rl_miibus);
error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
break;
case SIOCSIFCAP:
ifp->if_capenable &= ~(IFCAP_HWCSUM | IFCAP_POLLING);
ifp->if_capenable |=
ifr->ifr_reqcap & (IFCAP_HWCSUM | IFCAP_POLLING);
if (ifp->if_capenable & IFCAP_TXCSUM)
ifp->if_hwassist = RE_CSUM_FEATURES;
else
ifp->if_hwassist = 0;
if (ifp->if_flags & IFF_RUNNING)
re_init(sc);
break;
default:
error = ether_ioctl(ifp, command, data);
break;
}
return (error);
}
static void
re_watchdog(ifp)
struct ifnet *ifp;
{
struct rl_softc *sc;
sc = ifp->if_softc;
RL_LOCK(sc);
printf("re%d: watchdog timeout\n", sc->rl_unit);
ifp->if_oerrors++;
re_txeof(sc);
re_rxeof(sc);
re_init_locked(sc);
RL_UNLOCK(sc);
}
/*
* Stop the adapter and free any mbufs allocated to the
* RX and TX lists.
*/
static void
re_stop(sc)
struct rl_softc *sc;
{
register int i;
struct ifnet *ifp;
RL_LOCK_ASSERT(sc);
ifp = &sc->arpcom.ac_if;
ifp->if_timer = 0;
untimeout(re_tick, sc, sc->rl_stat_ch);
ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
#ifdef DEVICE_POLLING
ether_poll_deregister(ifp);
#endif /* DEVICE_POLLING */
CSR_WRITE_1(sc, RL_COMMAND, 0x00);
CSR_WRITE_2(sc, RL_IMR, 0x0000);
if (sc->rl_head != NULL) {
m_freem(sc->rl_head);
sc->rl_head = sc->rl_tail = NULL;
}
/* Free the TX list buffers. */
for (i = 0; i < RL_TX_DESC_CNT; i++) {
if (sc->rl_ldata.rl_tx_mbuf[i] != NULL) {
bus_dmamap_unload(sc->rl_ldata.rl_mtag,
sc->rl_ldata.rl_tx_dmamap[i]);
m_freem(sc->rl_ldata.rl_tx_mbuf[i]);
sc->rl_ldata.rl_tx_mbuf[i] = NULL;
}
}
/* Free the RX list buffers. */
for (i = 0; i < RL_RX_DESC_CNT; i++) {
if (sc->rl_ldata.rl_rx_mbuf[i] != NULL) {
bus_dmamap_unload(sc->rl_ldata.rl_mtag,
sc->rl_ldata.rl_rx_dmamap[i]);
m_freem(sc->rl_ldata.rl_rx_mbuf[i]);
sc->rl_ldata.rl_rx_mbuf[i] = NULL;
}
}
}
/*
* Device suspend routine. Stop the interface and save some PCI
* settings in case the BIOS doesn't restore them properly on
* resume.
*/
static int
re_suspend(dev)
device_t dev;
{
struct rl_softc *sc;
sc = device_get_softc(dev);
RL_LOCK(sc);
re_stop(sc);
sc->suspended = 1;
RL_UNLOCK(sc);
return (0);
}
/*
* Device resume routine. Restore some PCI settings in case the BIOS
* doesn't, re-enable busmastering, and restart the interface if
* appropriate.
*/
static int
re_resume(dev)
device_t dev;
{
struct rl_softc *sc;
struct ifnet *ifp;
sc = device_get_softc(dev);
RL_LOCK(sc);
ifp = &sc->arpcom.ac_if;
/* reinitialize interface if necessary */
if (ifp->if_flags & IFF_UP)
re_init_locked(sc);
sc->suspended = 0;
RL_UNLOCK(sc);
return (0);
}
/*
* Stop all chip I/O so that the kernel's probe routines don't
* get confused by errant DMAs when rebooting.
*/
static void
re_shutdown(dev)
device_t dev;
{
struct rl_softc *sc;
sc = device_get_softc(dev);
RL_LOCK(sc);
re_stop(sc);
RL_UNLOCK(sc);
}
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