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freebsd-dev/sys/arm/lpc/if_lpe.c

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/*-
* Copyright (c) 2011 Jakub Wojciech Klama <jceel@FreeBSD.org>
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#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/kernel.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/rman.h>
#include <sys/bus.h>
#include <sys/socket.h>
#include <machine/bus.h>
#include <machine/intr.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_var.h>
#include <net/bpf.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <arm/lpc/lpcreg.h>
#include <arm/lpc/lpcvar.h>
#include <arm/lpc/if_lpereg.h>
#include "miibus_if.h"
#ifdef DEBUG
#define debugf(fmt, args...) do { printf("%s(): ", __func__); \
printf(fmt,##args); } while (0)
#else
#define debugf(fmt, args...)
#endif
struct lpe_dmamap_arg {
bus_addr_t lpe_dma_busaddr;
};
struct lpe_rxdesc {
struct mbuf * lpe_rxdesc_mbuf;
bus_dmamap_t lpe_rxdesc_dmamap;
};
struct lpe_txdesc {
int lpe_txdesc_first;
struct mbuf * lpe_txdesc_mbuf;
bus_dmamap_t lpe_txdesc_dmamap;
};
struct lpe_chain_data {
bus_dma_tag_t lpe_parent_tag;
bus_dma_tag_t lpe_tx_ring_tag;
bus_dmamap_t lpe_tx_ring_map;
bus_dma_tag_t lpe_tx_status_tag;
bus_dmamap_t lpe_tx_status_map;
bus_dma_tag_t lpe_tx_buf_tag;
bus_dma_tag_t lpe_rx_ring_tag;
bus_dmamap_t lpe_rx_ring_map;
bus_dma_tag_t lpe_rx_status_tag;
bus_dmamap_t lpe_rx_status_map;
bus_dma_tag_t lpe_rx_buf_tag;
struct lpe_rxdesc lpe_rx_desc[LPE_RXDESC_NUM];
struct lpe_txdesc lpe_tx_desc[LPE_TXDESC_NUM];
int lpe_tx_prod;
int lpe_tx_last;
int lpe_tx_used;
};
struct lpe_ring_data {
struct lpe_hwdesc * lpe_rx_ring;
struct lpe_hwstatus * lpe_rx_status;
bus_addr_t lpe_rx_ring_phys;
bus_addr_t lpe_rx_status_phys;
struct lpe_hwdesc * lpe_tx_ring;
struct lpe_hwstatus * lpe_tx_status;
bus_addr_t lpe_tx_ring_phys;
bus_addr_t lpe_tx_status_phys;
};
struct lpe_softc {
struct ifnet * lpe_ifp;
struct mtx lpe_mtx;
phandle_t lpe_ofw;
device_t lpe_dev;
device_t lpe_miibus;
uint8_t lpe_enaddr[6];
struct resource * lpe_mem_res;
struct resource * lpe_irq_res;
void * lpe_intrhand;
bus_space_tag_t lpe_bst;
bus_space_handle_t lpe_bsh;
#define LPE_FLAG_LINK (1 << 0)
uint32_t lpe_flags;
int lpe_watchdog_timer;
struct callout lpe_tick;
struct lpe_chain_data lpe_cdata;
struct lpe_ring_data lpe_rdata;
};
static int lpe_probe(device_t);
static int lpe_attach(device_t);
static int lpe_detach(device_t);
static int lpe_miibus_readreg(device_t, int, int);
static int lpe_miibus_writereg(device_t, int, int, int);
static void lpe_miibus_statchg(device_t);
static void lpe_reset(struct lpe_softc *);
static void lpe_init(void *);
static void lpe_init_locked(struct lpe_softc *);
static void lpe_start(struct ifnet *);
static void lpe_start_locked(struct ifnet *);
static void lpe_stop(struct lpe_softc *);
static void lpe_stop_locked(struct lpe_softc *);
static int lpe_ioctl(struct ifnet *, u_long, caddr_t);
static void lpe_set_rxmode(struct lpe_softc *);
static void lpe_set_rxfilter(struct lpe_softc *);
static void lpe_intr(void *);
static void lpe_rxintr(struct lpe_softc *);
static void lpe_txintr(struct lpe_softc *);
static void lpe_tick(void *);
static void lpe_watchdog(struct lpe_softc *);
static int lpe_encap(struct lpe_softc *, struct mbuf **);
static int lpe_dma_alloc(struct lpe_softc *);
static int lpe_dma_alloc_rx(struct lpe_softc *);
static int lpe_dma_alloc_tx(struct lpe_softc *);
static int lpe_init_rx(struct lpe_softc *);
static int lpe_init_rxbuf(struct lpe_softc *, int);
static void lpe_discard_rxbuf(struct lpe_softc *, int);
static void lpe_dmamap_cb(void *, bus_dma_segment_t *, int, int);
static int lpe_ifmedia_upd(struct ifnet *);
static void lpe_ifmedia_sts(struct ifnet *, struct ifmediareq *);
#define lpe_lock(_sc) mtx_lock(&(_sc)->lpe_mtx)
#define lpe_unlock(_sc) mtx_unlock(&(_sc)->lpe_mtx)
#define lpe_lock_assert(_sc) mtx_assert(&(_sc)->lpe_mtx, MA_OWNED)
#define lpe_read_4(_sc, _reg) \
bus_space_read_4((_sc)->lpe_bst, (_sc)->lpe_bsh, (_reg))
#define lpe_write_4(_sc, _reg, _val) \
bus_space_write_4((_sc)->lpe_bst, (_sc)->lpe_bsh, (_reg), (_val))
#define LPE_HWDESC_RXERRS (LPE_HWDESC_CRCERROR | LPE_HWDESC_SYMBOLERROR | \
LPE_HWDESC_LENGTHERROR | LPE_HWDESC_ALIGNERROR | LPE_HWDESC_OVERRUN | \
LPE_HWDESC_RXNODESCR)
#define LPE_HWDESC_TXERRS (LPE_HWDESC_EXCDEFER | LPE_HWDESC_EXCCOLL | \
LPE_HWDESC_LATECOLL | LPE_HWDESC_UNDERRUN | LPE_HWDESC_TXNODESCR)
static int
lpe_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (!ofw_bus_is_compatible(dev, "lpc,ethernet"))
return (ENXIO);
device_set_desc(dev, "LPC32x0 10/100 Ethernet");
return (BUS_PROBE_DEFAULT);
}
static int
lpe_attach(device_t dev)
{
struct lpe_softc *sc = device_get_softc(dev);
struct ifnet *ifp;
int rid, i;
uint32_t val;
sc->lpe_dev = dev;
sc->lpe_ofw = ofw_bus_get_node(dev);
i = OF_getprop(sc->lpe_ofw, "local-mac-address", (void *)&sc->lpe_enaddr, 6);
if (i != 6) {
sc->lpe_enaddr[0] = 0x00;
sc->lpe_enaddr[1] = 0x11;
sc->lpe_enaddr[2] = 0x22;
sc->lpe_enaddr[3] = 0x33;
sc->lpe_enaddr[4] = 0x44;
sc->lpe_enaddr[5] = 0x55;
}
mtx_init(&sc->lpe_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
MTX_DEF);
callout_init_mtx(&sc->lpe_tick, &sc->lpe_mtx, 0);
rid = 0;
sc->lpe_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (!sc->lpe_mem_res) {
device_printf(dev, "cannot allocate memory window\n");
goto fail;
}
sc->lpe_bst = rman_get_bustag(sc->lpe_mem_res);
sc->lpe_bsh = rman_get_bushandle(sc->lpe_mem_res);
rid = 0;
sc->lpe_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_ACTIVE);
if (!sc->lpe_irq_res) {
device_printf(dev, "cannot allocate interrupt\n");
goto fail;
}
sc->lpe_ifp = if_alloc(IFT_ETHER);
if (!sc->lpe_ifp) {
device_printf(dev, "cannot allocated ifnet\n");
goto fail;
}
ifp = sc->lpe_ifp;
if_initname(ifp, device_get_name(dev), device_get_unit(dev));
ifp->if_softc = sc;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_start = lpe_start;
ifp->if_ioctl = lpe_ioctl;
ifp->if_init = lpe_init;
IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN);
ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN;
IFQ_SET_READY(&ifp->if_snd);
ether_ifattach(ifp, sc->lpe_enaddr);
if (bus_setup_intr(dev, sc->lpe_irq_res, INTR_TYPE_NET, NULL,
lpe_intr, sc, &sc->lpe_intrhand)) {
device_printf(dev, "cannot establish interrupt handler\n");
ether_ifdetach(ifp);
goto fail;
}
/* Enable Ethernet clock */
lpc_pwr_write(dev, LPC_CLKPWR_MACCLK_CTRL,
LPC_CLKPWR_MACCLK_CTRL_REG |
LPC_CLKPWR_MACCLK_CTRL_SLAVE |
LPC_CLKPWR_MACCLK_CTRL_MASTER |
LPC_CLKPWR_MACCLK_CTRL_HDWINF(3));
/* Reset chip */
lpe_reset(sc);
/* Initialize MII */
val = lpe_read_4(sc, LPE_COMMAND);
lpe_write_4(sc, LPE_COMMAND, val | LPE_COMMAND_RMII);
if (mii_attach(dev, &sc->lpe_miibus, ifp, lpe_ifmedia_upd,
lpe_ifmedia_sts, BMSR_DEFCAPMASK, 0x01,
MII_OFFSET_ANY, 0)) {
device_printf(dev, "cannot find PHY\n");
goto fail;
}
lpe_dma_alloc(sc);
return (0);
fail:
if (sc->lpe_ifp)
if_free(sc->lpe_ifp);
if (sc->lpe_intrhand)
bus_teardown_intr(dev, sc->lpe_irq_res, sc->lpe_intrhand);
if (sc->lpe_irq_res)
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->lpe_irq_res);
if (sc->lpe_mem_res)
bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->lpe_mem_res);
return (ENXIO);
}
static int
lpe_detach(device_t dev)
{
struct lpe_softc *sc = device_get_softc(dev);
lpe_stop(sc);
if_free(sc->lpe_ifp);
bus_teardown_intr(dev, sc->lpe_irq_res, sc->lpe_intrhand);
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->lpe_irq_res);
bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->lpe_mem_res);
return (0);
}
static int
lpe_miibus_readreg(device_t dev, int phy, int reg)
{
struct lpe_softc *sc = device_get_softc(dev);
uint32_t val;
int result;
lpe_write_4(sc, LPE_MCMD, LPE_MCMD_READ);
lpe_write_4(sc, LPE_MADR,
(reg & LPE_MADR_REGMASK) << LPE_MADR_REGSHIFT |
(phy & LPE_MADR_PHYMASK) << LPE_MADR_PHYSHIFT);
val = lpe_read_4(sc, LPE_MIND);
/* Wait until request is completed */
while (val & LPE_MIND_BUSY) {
val = lpe_read_4(sc, LPE_MIND);
DELAY(10);
}
if (val & LPE_MIND_INVALID)
return (0);
lpe_write_4(sc, LPE_MCMD, 0);
result = (lpe_read_4(sc, LPE_MRDD) & LPE_MRDD_DATAMASK);
debugf("phy=%d reg=%d result=0x%04x\n", phy, reg, result);
return (result);
}
static int
lpe_miibus_writereg(device_t dev, int phy, int reg, int data)
{
struct lpe_softc *sc = device_get_softc(dev);
uint32_t val;
debugf("phy=%d reg=%d data=0x%04x\n", phy, reg, data);
lpe_write_4(sc, LPE_MCMD, LPE_MCMD_WRITE);
lpe_write_4(sc, LPE_MADR,
(reg & LPE_MADR_REGMASK) << LPE_MADR_REGSHIFT |
(phy & LPE_MADR_PHYMASK) << LPE_MADR_PHYSHIFT);
lpe_write_4(sc, LPE_MWTD, (data & LPE_MWTD_DATAMASK));
val = lpe_read_4(sc, LPE_MIND);
/* Wait until request is completed */
while (val & LPE_MIND_BUSY) {
val = lpe_read_4(sc, LPE_MIND);
DELAY(10);
}
return (0);
}
static void
lpe_miibus_statchg(device_t dev)
{
struct lpe_softc *sc = device_get_softc(dev);
struct mii_data *mii = device_get_softc(sc->lpe_miibus);
lpe_lock(sc);
if ((mii->mii_media_status & IFM_ACTIVE) &&
(mii->mii_media_status & IFM_AVALID))
sc->lpe_flags |= LPE_FLAG_LINK;
else
sc->lpe_flags &= ~LPE_FLAG_LINK;
lpe_unlock(sc);
}
static void
lpe_reset(struct lpe_softc *sc)
{
uint32_t mac1;
/* Enter soft reset mode */
mac1 = lpe_read_4(sc, LPE_MAC1);
lpe_write_4(sc, LPE_MAC1, mac1 | LPE_MAC1_SOFTRESET | LPE_MAC1_RESETTX |
LPE_MAC1_RESETMCSTX | LPE_MAC1_RESETRX | LPE_MAC1_RESETMCSRX);
/* Reset registers, Tx path and Rx path */
lpe_write_4(sc, LPE_COMMAND, LPE_COMMAND_REGRESET |
LPE_COMMAND_TXRESET | LPE_COMMAND_RXRESET);
/* Set station address */
lpe_write_4(sc, LPE_SA2, sc->lpe_enaddr[1] << 8 | sc->lpe_enaddr[0]);
lpe_write_4(sc, LPE_SA1, sc->lpe_enaddr[3] << 8 | sc->lpe_enaddr[2]);
lpe_write_4(sc, LPE_SA0, sc->lpe_enaddr[5] << 8 | sc->lpe_enaddr[4]);
/* Leave soft reset mode */
mac1 = lpe_read_4(sc, LPE_MAC1);
lpe_write_4(sc, LPE_MAC1, mac1 & ~(LPE_MAC1_SOFTRESET | LPE_MAC1_RESETTX |
LPE_MAC1_RESETMCSTX | LPE_MAC1_RESETRX | LPE_MAC1_RESETMCSRX));
}
static void
lpe_init(void *arg)
{
struct lpe_softc *sc = (struct lpe_softc *)arg;
lpe_lock(sc);
lpe_init_locked(sc);
lpe_unlock(sc);
}
static void
lpe_init_locked(struct lpe_softc *sc)
{
struct ifnet *ifp = sc->lpe_ifp;
uint32_t cmd, mac1;
lpe_lock_assert(sc);
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
return;
/* Enable Tx and Rx */
cmd = lpe_read_4(sc, LPE_COMMAND);
lpe_write_4(sc, LPE_COMMAND, cmd | LPE_COMMAND_RXENABLE |
LPE_COMMAND_TXENABLE | LPE_COMMAND_PASSRUNTFRAME);
/* Enable receive */
mac1 = lpe_read_4(sc, LPE_MAC1);
lpe_write_4(sc, LPE_MAC1, /*mac1 |*/ LPE_MAC1_RXENABLE | LPE_MAC1_PASSALL);
lpe_write_4(sc, LPE_MAC2, LPE_MAC2_CRCENABLE | LPE_MAC2_PADCRCENABLE |
LPE_MAC2_FULLDUPLEX);
lpe_write_4(sc, LPE_MCFG, LPE_MCFG_CLKSEL(7));
/* Set up Rx filter */
lpe_set_rxmode(sc);
/* Enable interrupts */
lpe_write_4(sc, LPE_INTENABLE, LPE_INT_RXOVERRUN | LPE_INT_RXERROR |
LPE_INT_RXFINISH | LPE_INT_RXDONE | LPE_INT_TXUNDERRUN |
LPE_INT_TXERROR | LPE_INT_TXFINISH | LPE_INT_TXDONE);
sc->lpe_cdata.lpe_tx_prod = 0;
sc->lpe_cdata.lpe_tx_last = 0;
sc->lpe_cdata.lpe_tx_used = 0;
lpe_init_rx(sc);
/* Initialize Rx packet and status descriptor heads */
lpe_write_4(sc, LPE_RXDESC, sc->lpe_rdata.lpe_rx_ring_phys);
lpe_write_4(sc, LPE_RXSTATUS, sc->lpe_rdata.lpe_rx_status_phys);
lpe_write_4(sc, LPE_RXDESC_NUMBER, LPE_RXDESC_NUM - 1);
lpe_write_4(sc, LPE_RXDESC_CONS, 0);
/* Initialize Tx packet and status descriptor heads */
lpe_write_4(sc, LPE_TXDESC, sc->lpe_rdata.lpe_tx_ring_phys);
lpe_write_4(sc, LPE_TXSTATUS, sc->lpe_rdata.lpe_tx_status_phys);
lpe_write_4(sc, LPE_TXDESC_NUMBER, LPE_TXDESC_NUM - 1);
lpe_write_4(sc, LPE_TXDESC_PROD, 0);
ifp->if_drv_flags |= IFF_DRV_RUNNING;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
callout_reset(&sc->lpe_tick, hz, lpe_tick, sc);
}
static void
lpe_start(struct ifnet *ifp)
{
struct lpe_softc *sc = (struct lpe_softc *)ifp->if_softc;
lpe_lock(sc);
lpe_start_locked(ifp);
lpe_unlock(sc);
}
static void
lpe_start_locked(struct ifnet *ifp)
{
struct lpe_softc *sc = (struct lpe_softc *)ifp->if_softc;
struct mbuf *m_head;
int encap = 0;
lpe_lock_assert(sc);
while (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) {
if (lpe_read_4(sc, LPE_TXDESC_PROD) ==
lpe_read_4(sc, LPE_TXDESC_CONS) - 5)
break;
/* Dequeue first packet */
IFQ_DRV_DEQUEUE(&ifp->if_snd, m_head);
if (!m_head)
break;
lpe_encap(sc, &m_head);
encap++;
}
/* Submit new descriptor list */
if (encap) {
lpe_write_4(sc, LPE_TXDESC_PROD, sc->lpe_cdata.lpe_tx_prod);
sc->lpe_watchdog_timer = 5;
}
}
static int
lpe_encap(struct lpe_softc *sc, struct mbuf **m_head)
{
struct lpe_txdesc *txd;
struct lpe_hwdesc *hwd;
bus_dma_segment_t segs[LPE_MAXFRAGS];
int i, err, nsegs, prod;
lpe_lock_assert(sc);
M_ASSERTPKTHDR((*m_head));
prod = sc->lpe_cdata.lpe_tx_prod;
txd = &sc->lpe_cdata.lpe_tx_desc[prod];
debugf("starting with prod=%d\n", prod);
err = bus_dmamap_load_mbuf_sg(sc->lpe_cdata.lpe_tx_buf_tag,
txd->lpe_txdesc_dmamap, *m_head, segs, &nsegs, BUS_DMA_NOWAIT);
if (err)
return (err);
if (nsegs == 0) {
m_freem(*m_head);
*m_head = NULL;
return (EIO);
}
bus_dmamap_sync(sc->lpe_cdata.lpe_tx_buf_tag, txd->lpe_txdesc_dmamap,
BUS_DMASYNC_PREREAD);
bus_dmamap_sync(sc->lpe_cdata.lpe_tx_ring_tag, sc->lpe_cdata.lpe_tx_ring_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
txd->lpe_txdesc_first = 1;
txd->lpe_txdesc_mbuf = *m_head;
for (i = 0; i < nsegs; i++) {
hwd = &sc->lpe_rdata.lpe_tx_ring[prod];
hwd->lhr_data = segs[i].ds_addr;
hwd->lhr_control = segs[i].ds_len - 1;
if (i == nsegs - 1) {
hwd->lhr_control |= LPE_HWDESC_LASTFLAG;
hwd->lhr_control |= LPE_HWDESC_INTERRUPT;
hwd->lhr_control |= LPE_HWDESC_CRC;
hwd->lhr_control |= LPE_HWDESC_PAD;
}
LPE_INC(prod, LPE_TXDESC_NUM);
}
bus_dmamap_sync(sc->lpe_cdata.lpe_tx_ring_tag, sc->lpe_cdata.lpe_tx_ring_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
sc->lpe_cdata.lpe_tx_used += nsegs;
sc->lpe_cdata.lpe_tx_prod = prod;
return (0);
}
static void
lpe_stop(struct lpe_softc *sc)
{
lpe_lock(sc);
lpe_stop_locked(sc);
lpe_unlock(sc);
}
static void
lpe_stop_locked(struct lpe_softc *sc)
{
lpe_lock_assert(sc);
callout_stop(&sc->lpe_tick);
/* Disable interrupts */
lpe_write_4(sc, LPE_INTCLEAR, 0xffffffff);
/* Stop EMAC */
lpe_write_4(sc, LPE_MAC1, 0);
lpe_write_4(sc, LPE_MAC2, 0);
lpe_write_4(sc, LPE_COMMAND, 0);
sc->lpe_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
sc->lpe_ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
}
static int
lpe_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct lpe_softc *sc = ifp->if_softc;
struct mii_data *mii = device_get_softc(sc->lpe_miibus);
struct ifreq *ifr = (struct ifreq *)data;
int err = 0;
switch (cmd) {
case SIOCSIFFLAGS:
lpe_lock(sc);
if (ifp->if_flags & IFF_UP) {
if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
lpe_set_rxmode(sc);
lpe_set_rxfilter(sc);
} else
lpe_init_locked(sc);
} else
lpe_stop(sc);
lpe_unlock(sc);
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
lpe_lock(sc);
lpe_set_rxfilter(sc);
lpe_unlock(sc);
}
break;
case SIOCGIFMEDIA:
case SIOCSIFMEDIA:
err = ifmedia_ioctl(ifp, ifr, &mii->mii_media, cmd);
break;
default:
err = ether_ioctl(ifp, cmd, data);
break;
}
return (err);
}
static void lpe_set_rxmode(struct lpe_softc *sc)
{
struct ifnet *ifp = sc->lpe_ifp;
uint32_t rxfilt;
rxfilt = LPE_RXFILTER_UNIHASH | LPE_RXFILTER_MULTIHASH | LPE_RXFILTER_PERFECT;
if (ifp->if_flags & IFF_BROADCAST)
rxfilt |= LPE_RXFILTER_BROADCAST;
if (ifp->if_flags & IFF_PROMISC)
rxfilt |= LPE_RXFILTER_UNICAST | LPE_RXFILTER_MULTICAST;
if (ifp->if_flags & IFF_ALLMULTI)
rxfilt |= LPE_RXFILTER_MULTICAST;
lpe_write_4(sc, LPE_RXFILTER_CTRL, rxfilt);
}
static void lpe_set_rxfilter(struct lpe_softc *sc)
{
struct ifnet *ifp = sc->lpe_ifp;
struct ifmultiaddr *ifma;
int index;
uint32_t hashl, hashh;
hashl = 0;
hashh = 0;
if_maddr_rlock(ifp);
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
if (ifma->ifma_addr->sa_family != AF_LINK)
continue;
index = ether_crc32_be(LLADDR((struct sockaddr_dl *)
ifma->ifma_addr), ETHER_ADDR_LEN) >> 23 & 0x3f;
if (index > 31)
hashh |= (1 << (index - 32));
else
hashl |= (1 << index);
}
if_maddr_runlock(ifp);
/* Program new hash filter */
lpe_write_4(sc, LPE_HASHFILTER_L, hashl);
lpe_write_4(sc, LPE_HASHFILTER_H, hashh);
}
static void
lpe_intr(void *arg)
{
struct lpe_softc *sc = (struct lpe_softc *)arg;
uint32_t intstatus;
debugf("status=0x%08x\n", lpe_read_4(sc, LPE_INTSTATUS));
lpe_lock(sc);
while ((intstatus = lpe_read_4(sc, LPE_INTSTATUS))) {
if (intstatus & LPE_INT_RXDONE)
lpe_rxintr(sc);
if (intstatus & LPE_INT_TXDONE)
lpe_txintr(sc);
lpe_write_4(sc, LPE_INTCLEAR, 0xffff);
}
lpe_unlock(sc);
}
static void
lpe_rxintr(struct lpe_softc *sc)
{
struct ifnet *ifp = sc->lpe_ifp;
struct lpe_hwdesc *hwd;
struct lpe_hwstatus *hws;
struct lpe_rxdesc *rxd;
struct mbuf *m;
int prod, cons;
for (;;) {
prod = lpe_read_4(sc, LPE_RXDESC_PROD);
cons = lpe_read_4(sc, LPE_RXDESC_CONS);
if (prod == cons)
break;
rxd = &sc->lpe_cdata.lpe_rx_desc[cons];
hwd = &sc->lpe_rdata.lpe_rx_ring[cons];
hws = &sc->lpe_rdata.lpe_rx_status[cons];
/* Check received frame for errors */
if (hws->lhs_info & LPE_HWDESC_RXERRS) {
if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
lpe_discard_rxbuf(sc, cons);
lpe_init_rxbuf(sc, cons);
goto skip;
}
m = rxd->lpe_rxdesc_mbuf;
m->m_pkthdr.rcvif = ifp;
m->m_data += 2;
if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
lpe_unlock(sc);
(*ifp->if_input)(ifp, m);
lpe_lock(sc);
lpe_init_rxbuf(sc, cons);
skip:
LPE_INC(cons, LPE_RXDESC_NUM);
lpe_write_4(sc, LPE_RXDESC_CONS, cons);
}
}
static void
lpe_txintr(struct lpe_softc *sc)
{
struct ifnet *ifp = sc->lpe_ifp;
struct lpe_hwdesc *hwd;
struct lpe_hwstatus *hws;
struct lpe_txdesc *txd;
int cons, last;
for (;;) {
cons = lpe_read_4(sc, LPE_TXDESC_CONS);
last = sc->lpe_cdata.lpe_tx_last;
if (cons == last)
break;
txd = &sc->lpe_cdata.lpe_tx_desc[last];
hwd = &sc->lpe_rdata.lpe_tx_ring[last];
hws = &sc->lpe_rdata.lpe_tx_status[last];
bus_dmamap_sync(sc->lpe_cdata.lpe_tx_buf_tag,
txd->lpe_txdesc_dmamap, BUS_DMASYNC_POSTWRITE);
if_inc_counter(ifp, IFCOUNTER_COLLISIONS, LPE_HWDESC_COLLISIONS(hws->lhs_info));
if (hws->lhs_info & LPE_HWDESC_TXERRS)
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
else
if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
if (txd->lpe_txdesc_first) {
bus_dmamap_unload(sc->lpe_cdata.lpe_tx_buf_tag,
txd->lpe_txdesc_dmamap);
m_freem(txd->lpe_txdesc_mbuf);
txd->lpe_txdesc_mbuf = NULL;
txd->lpe_txdesc_first = 0;
}
sc->lpe_cdata.lpe_tx_used--;
LPE_INC(sc->lpe_cdata.lpe_tx_last, LPE_TXDESC_NUM);
}
if (!sc->lpe_cdata.lpe_tx_used)
sc->lpe_watchdog_timer = 0;
}
static void
lpe_tick(void *arg)
{
struct lpe_softc *sc = (struct lpe_softc *)arg;
struct mii_data *mii = device_get_softc(sc->lpe_miibus);
lpe_lock_assert(sc);
mii_tick(mii);
lpe_watchdog(sc);
callout_reset(&sc->lpe_tick, hz, lpe_tick, sc);
}
static void
lpe_watchdog(struct lpe_softc *sc)
{
struct ifnet *ifp = sc->lpe_ifp;
lpe_lock_assert(sc);
if (sc->lpe_watchdog_timer == 0 || sc->lpe_watchdog_timer--)
return;
/* Chip has stopped responding */
device_printf(sc->lpe_dev, "WARNING: chip hangup, restarting...\n");
lpe_stop_locked(sc);
lpe_init_locked(sc);
/* Try to resend packets */
if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
lpe_start_locked(ifp);
}
static int
lpe_dma_alloc(struct lpe_softc *sc)
{
int err;
/* Create parent DMA tag */
err = bus_dma_tag_create(
bus_get_dma_tag(sc->lpe_dev),
1, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
BUS_SPACE_MAXSIZE_32BIT, 0, /* maxsize, nsegments */
BUS_SPACE_MAXSIZE_32BIT, 0, /* maxsegsize, flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->lpe_cdata.lpe_parent_tag);
if (err) {
device_printf(sc->lpe_dev, "cannot create parent DMA tag\n");
return (err);
}
err = lpe_dma_alloc_rx(sc);
if (err)
return (err);
err = lpe_dma_alloc_tx(sc);
if (err)
return (err);
return (0);
}
static int
lpe_dma_alloc_rx(struct lpe_softc *sc)
{
struct lpe_rxdesc *rxd;
struct lpe_dmamap_arg ctx;
int err, i;
/* Create tag for Rx ring */
err = bus_dma_tag_create(
sc->lpe_cdata.lpe_parent_tag,
LPE_DESC_ALIGN, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
LPE_RXDESC_SIZE, 1, /* maxsize, nsegments */
LPE_RXDESC_SIZE, 0, /* maxsegsize, flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->lpe_cdata.lpe_rx_ring_tag);
if (err) {
device_printf(sc->lpe_dev, "cannot create Rx ring DMA tag\n");
goto fail;
}
/* Create tag for Rx status ring */
err = bus_dma_tag_create(
sc->lpe_cdata.lpe_parent_tag,
LPE_DESC_ALIGN, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
LPE_RXSTATUS_SIZE, 1, /* maxsize, nsegments */
LPE_RXSTATUS_SIZE, 0, /* maxsegsize, flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->lpe_cdata.lpe_rx_status_tag);
if (err) {
device_printf(sc->lpe_dev, "cannot create Rx status ring DMA tag\n");
goto fail;
}
/* Create tag for Rx buffers */
err = bus_dma_tag_create(
sc->lpe_cdata.lpe_parent_tag,
LPE_DESC_ALIGN, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
MCLBYTES * LPE_RXDESC_NUM, /* maxsize */
LPE_RXDESC_NUM, /* segments */
MCLBYTES, 0, /* maxsegsize, flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->lpe_cdata.lpe_rx_buf_tag);
if (err) {
device_printf(sc->lpe_dev, "cannot create Rx buffers DMA tag\n");
goto fail;
}
/* Allocate Rx DMA ring */
err = bus_dmamem_alloc(sc->lpe_cdata.lpe_rx_ring_tag,
(void **)&sc->lpe_rdata.lpe_rx_ring, BUS_DMA_WAITOK | BUS_DMA_COHERENT |
BUS_DMA_ZERO, &sc->lpe_cdata.lpe_rx_ring_map);
err = bus_dmamap_load(sc->lpe_cdata.lpe_rx_ring_tag,
sc->lpe_cdata.lpe_rx_ring_map, sc->lpe_rdata.lpe_rx_ring,
LPE_RXDESC_SIZE, lpe_dmamap_cb, &ctx, 0);
sc->lpe_rdata.lpe_rx_ring_phys = ctx.lpe_dma_busaddr;
/* Allocate Rx status ring */
err = bus_dmamem_alloc(sc->lpe_cdata.lpe_rx_status_tag,
(void **)&sc->lpe_rdata.lpe_rx_status, BUS_DMA_WAITOK | BUS_DMA_COHERENT |
BUS_DMA_ZERO, &sc->lpe_cdata.lpe_rx_status_map);
err = bus_dmamap_load(sc->lpe_cdata.lpe_rx_status_tag,
sc->lpe_cdata.lpe_rx_status_map, sc->lpe_rdata.lpe_rx_status,
LPE_RXDESC_SIZE, lpe_dmamap_cb, &ctx, 0);
sc->lpe_rdata.lpe_rx_status_phys = ctx.lpe_dma_busaddr;
/* Create Rx buffers DMA map */
for (i = 0; i < LPE_RXDESC_NUM; i++) {
rxd = &sc->lpe_cdata.lpe_rx_desc[i];
rxd->lpe_rxdesc_mbuf = NULL;
rxd->lpe_rxdesc_dmamap = NULL;
err = bus_dmamap_create(sc->lpe_cdata.lpe_rx_buf_tag, 0,
&rxd->lpe_rxdesc_dmamap);
if (err) {
device_printf(sc->lpe_dev, "cannot create Rx DMA map\n");
return (err);
}
}
return (0);
fail:
return (err);
}
static int
lpe_dma_alloc_tx(struct lpe_softc *sc)
{
struct lpe_txdesc *txd;
struct lpe_dmamap_arg ctx;
int err, i;
/* Create tag for Tx ring */
err = bus_dma_tag_create(
sc->lpe_cdata.lpe_parent_tag,
LPE_DESC_ALIGN, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
LPE_TXDESC_SIZE, 1, /* maxsize, nsegments */
LPE_TXDESC_SIZE, 0, /* maxsegsize, flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->lpe_cdata.lpe_tx_ring_tag);
if (err) {
device_printf(sc->lpe_dev, "cannot create Tx ring DMA tag\n");
goto fail;
}
/* Create tag for Tx status ring */
err = bus_dma_tag_create(
sc->lpe_cdata.lpe_parent_tag,
LPE_DESC_ALIGN, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
LPE_TXSTATUS_SIZE, 1, /* maxsize, nsegments */
LPE_TXSTATUS_SIZE, 0, /* maxsegsize, flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->lpe_cdata.lpe_tx_status_tag);
if (err) {
device_printf(sc->lpe_dev, "cannot create Tx status ring DMA tag\n");
goto fail;
}
/* Create tag for Tx buffers */
err = bus_dma_tag_create(
sc->lpe_cdata.lpe_parent_tag,
LPE_DESC_ALIGN, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
MCLBYTES * LPE_TXDESC_NUM, /* maxsize */
LPE_TXDESC_NUM, /* segments */
MCLBYTES, 0, /* maxsegsize, flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->lpe_cdata.lpe_tx_buf_tag);
if (err) {
device_printf(sc->lpe_dev, "cannot create Tx buffers DMA tag\n");
goto fail;
}
/* Allocate Tx DMA ring */
err = bus_dmamem_alloc(sc->lpe_cdata.lpe_tx_ring_tag,
(void **)&sc->lpe_rdata.lpe_tx_ring, BUS_DMA_WAITOK | BUS_DMA_COHERENT |
BUS_DMA_ZERO, &sc->lpe_cdata.lpe_tx_ring_map);
err = bus_dmamap_load(sc->lpe_cdata.lpe_tx_ring_tag,
sc->lpe_cdata.lpe_tx_ring_map, sc->lpe_rdata.lpe_tx_ring,
LPE_RXDESC_SIZE, lpe_dmamap_cb, &ctx, 0);
sc->lpe_rdata.lpe_tx_ring_phys = ctx.lpe_dma_busaddr;
/* Allocate Tx status ring */
err = bus_dmamem_alloc(sc->lpe_cdata.lpe_tx_status_tag,
(void **)&sc->lpe_rdata.lpe_tx_status, BUS_DMA_WAITOK | BUS_DMA_COHERENT |
BUS_DMA_ZERO, &sc->lpe_cdata.lpe_tx_status_map);
err = bus_dmamap_load(sc->lpe_cdata.lpe_tx_status_tag,
sc->lpe_cdata.lpe_tx_status_map, sc->lpe_rdata.lpe_tx_status,
LPE_RXDESC_SIZE, lpe_dmamap_cb, &ctx, 0);
sc->lpe_rdata.lpe_tx_status_phys = ctx.lpe_dma_busaddr;
/* Create Tx buffers DMA map */
for (i = 0; i < LPE_TXDESC_NUM; i++) {
txd = &sc->lpe_cdata.lpe_tx_desc[i];
txd->lpe_txdesc_mbuf = NULL;
txd->lpe_txdesc_dmamap = NULL;
txd->lpe_txdesc_first = 0;
err = bus_dmamap_create(sc->lpe_cdata.lpe_tx_buf_tag, 0,
&txd->lpe_txdesc_dmamap);
if (err) {
device_printf(sc->lpe_dev, "cannot create Tx DMA map\n");
return (err);
}
}
return (0);
fail:
return (err);
}
static int
lpe_init_rx(struct lpe_softc *sc)
{
int i, err;
for (i = 0; i < LPE_RXDESC_NUM; i++) {
err = lpe_init_rxbuf(sc, i);
if (err)
return (err);
}
return (0);
}
static int
lpe_init_rxbuf(struct lpe_softc *sc, int n)
{
struct lpe_rxdesc *rxd;
struct lpe_hwdesc *hwd;
struct lpe_hwstatus *hws;
struct mbuf *m;
bus_dma_segment_t segs[1];
int nsegs;
rxd = &sc->lpe_cdata.lpe_rx_desc[n];
hwd = &sc->lpe_rdata.lpe_rx_ring[n];
hws = &sc->lpe_rdata.lpe_rx_status[n];
m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
if (!m) {
device_printf(sc->lpe_dev, "WARNING: mbufs exhausted!\n");
return (ENOBUFS);
}
m->m_len = m->m_pkthdr.len = MCLBYTES;
bus_dmamap_unload(sc->lpe_cdata.lpe_rx_buf_tag, rxd->lpe_rxdesc_dmamap);
if (bus_dmamap_load_mbuf_sg(sc->lpe_cdata.lpe_rx_buf_tag,
rxd->lpe_rxdesc_dmamap, m, segs, &nsegs, 0)) {
m_freem(m);
return (ENOBUFS);
}
bus_dmamap_sync(sc->lpe_cdata.lpe_rx_buf_tag, rxd->lpe_rxdesc_dmamap,
BUS_DMASYNC_PREREAD);
rxd->lpe_rxdesc_mbuf = m;
hwd->lhr_data = segs[0].ds_addr + 2;
hwd->lhr_control = (segs[0].ds_len - 1) | LPE_HWDESC_INTERRUPT;
return (0);
}
static void
lpe_discard_rxbuf(struct lpe_softc *sc, int n)
{
struct lpe_rxdesc *rxd;
struct lpe_hwdesc *hwd;
rxd = &sc->lpe_cdata.lpe_rx_desc[n];
hwd = &sc->lpe_rdata.lpe_rx_ring[n];
bus_dmamap_unload(sc->lpe_cdata.lpe_rx_buf_tag, rxd->lpe_rxdesc_dmamap);
hwd->lhr_data = 0;
hwd->lhr_control = 0;
if (rxd->lpe_rxdesc_mbuf) {
m_freem(rxd->lpe_rxdesc_mbuf);
rxd->lpe_rxdesc_mbuf = NULL;
}
}
static void
lpe_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
struct lpe_dmamap_arg *ctx;
if (error)
return;
ctx = (struct lpe_dmamap_arg *)arg;
ctx->lpe_dma_busaddr = segs[0].ds_addr;
}
static int
lpe_ifmedia_upd(struct ifnet *ifp)
{
return (0);
}
static void
lpe_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
{
struct lpe_softc *sc = ifp->if_softc;
struct mii_data *mii = device_get_softc(sc->lpe_miibus);
lpe_lock(sc);
mii_pollstat(mii);
ifmr->ifm_active = mii->mii_media_active;
ifmr->ifm_status = mii->mii_media_status;
lpe_unlock(sc);
}
static device_method_t lpe_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, lpe_probe),
DEVMETHOD(device_attach, lpe_attach),
DEVMETHOD(device_detach, lpe_detach),
/* Bus interface */
DEVMETHOD(bus_print_child, bus_generic_print_child),
/* MII interface */
DEVMETHOD(miibus_readreg, lpe_miibus_readreg),
DEVMETHOD(miibus_writereg, lpe_miibus_writereg),
DEVMETHOD(miibus_statchg, lpe_miibus_statchg),
{ 0, 0 }
};
static driver_t lpe_driver = {
"lpe",
lpe_methods,
sizeof(struct lpe_softc),
};
static devclass_t lpe_devclass;
DRIVER_MODULE(lpe, simplebus, lpe_driver, lpe_devclass, 0, 0);
DRIVER_MODULE(miibus, lpe, miibus_driver, miibus_devclass, 0, 0);
MODULE_DEPEND(lpe, obio, 1, 1, 1);
MODULE_DEPEND(lpe, miibus, 1, 1, 1);
MODULE_DEPEND(lpe, ether, 1, 1, 1);
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