d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
39dec33f2b
freebsd-skq/sys/mips/atheros/if_arge.c
Adrian Chadd 49def78fbb Remove a now unneeded ARGE_UNLOCK(). 
Whilst I'm here, remove a couple blank lines.
2012-03-13 06:50:56 +00:00

1993 lines
49 KiB
C
Raw Blame History

/*-
* Copyright (c) 2009, Oleksandr Tymoshenko
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* AR71XX gigabit ethernet driver
*/
#ifdef HAVE_KERNEL_OPTION_HEADERS
#include "opt_device_polling.h"
#endif
#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/socket.h>
#include <sys/taskqueue.h>
#include <sys/sysctl.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/bpf.h>
#include <machine/bus.h>
#include <machine/cache.h>
#include <machine/resource.h>
#include <vm/vm_param.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/pmap.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(arge, ether, 1, 1, 1);
MODULE_DEPEND(arge, miibus, 1, 1, 1);
#include "miibus_if.h"
#include <mips/atheros/ar71xxreg.h>
#include <mips/atheros/if_argevar.h>
#include <mips/atheros/ar71xx_setup.h>
#include <mips/atheros/ar71xx_cpudef.h>
typedef enum {
ARGE_DBG_MII = 0x00000001,
ARGE_DBG_INTR = 0x00000002,
ARGE_DBG_TX = 0x00000004,
ARGE_DBG_RX = 0x00000008,
ARGE_DBG_ERR = 0x00000010,
ARGE_DBG_RESET = 0x00000020,
} arge_debug_flags;
#ifdef ARGE_DEBUG
#define ARGEDEBUG(_sc, _m, ...) \
do { \
if ((_m) & (_sc)->arge_debug) \
device_printf((_sc)->arge_dev, __VA_ARGS__); \
} while (0)
#else
#define ARGEDEBUG(_sc, _m, ...)
#endif
static int arge_attach(device_t);
static int arge_detach(device_t);
static void arge_flush_ddr(struct arge_softc *);
static int arge_ifmedia_upd(struct ifnet *);
static void arge_ifmedia_sts(struct ifnet *, struct ifmediareq *);
static int arge_ioctl(struct ifnet *, u_long, caddr_t);
static void arge_init(void *);
static void arge_init_locked(struct arge_softc *);
static void arge_link_task(void *, int);
static void arge_update_link_locked(struct arge_softc *sc);
static void arge_set_pll(struct arge_softc *, int, int);
static int arge_miibus_readreg(device_t, int, int);
static void arge_miibus_statchg(device_t);
static int arge_miibus_writereg(device_t, int, int, int);
static int arge_probe(device_t);
static void arge_reset_dma(struct arge_softc *);
static int arge_resume(device_t);
static int arge_rx_ring_init(struct arge_softc *);
static void arge_rx_ring_free(struct arge_softc *sc);
static int arge_tx_ring_init(struct arge_softc *);
#ifdef DEVICE_POLLING
static int arge_poll(struct ifnet *, enum poll_cmd, int);
#endif
static int arge_shutdown(device_t);
static void arge_start(struct ifnet *);
static void arge_start_locked(struct ifnet *);
static void arge_stop(struct arge_softc *);
static int arge_suspend(device_t);
static int arge_rx_locked(struct arge_softc *);
static void arge_tx_locked(struct arge_softc *);
static void arge_intr(void *);
static int arge_intr_filter(void *);
static void arge_tick(void *);
/*
* ifmedia callbacks for multiPHY MAC
*/
void arge_multiphy_mediastatus(struct ifnet *, struct ifmediareq *);
int arge_multiphy_mediachange(struct ifnet *);
static void arge_dmamap_cb(void *, bus_dma_segment_t *, int, int);
static int arge_dma_alloc(struct arge_softc *);
static void arge_dma_free(struct arge_softc *);
static int arge_newbuf(struct arge_softc *, int);
static __inline void arge_fixup_rx(struct mbuf *);
static device_method_t arge_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, arge_probe),
DEVMETHOD(device_attach, arge_attach),
DEVMETHOD(device_detach, arge_detach),
DEVMETHOD(device_suspend, arge_suspend),
DEVMETHOD(device_resume, arge_resume),
DEVMETHOD(device_shutdown, arge_shutdown),
/* MII interface */
DEVMETHOD(miibus_readreg, arge_miibus_readreg),
DEVMETHOD(miibus_writereg, arge_miibus_writereg),
DEVMETHOD(miibus_statchg, arge_miibus_statchg),
DEVMETHOD_END
};
static driver_t arge_driver = {
"arge",
arge_methods,
sizeof(struct arge_softc)
};
static devclass_t arge_devclass;
DRIVER_MODULE(arge, nexus, arge_driver, arge_devclass, 0, 0);
DRIVER_MODULE(miibus, arge, miibus_driver, miibus_devclass, 0, 0);
/*
* RedBoot passes MAC address to entry point as environment
* variable. platfrom_start parses it and stores in this variable
*/
extern uint32_t ar711_base_mac[ETHER_ADDR_LEN];
static struct mtx miibus_mtx;
MTX_SYSINIT(miibus_mtx, &miibus_mtx, "arge mii lock", MTX_DEF);
/*
* Flushes all
*/
static void
arge_flush_ddr(struct arge_softc *sc)
{
ar71xx_device_flush_ddr_ge(sc->arge_mac_unit);
}
static int
arge_probe(device_t dev)
{
device_set_desc(dev, "Atheros AR71xx built-in ethernet interface");
return (0);
}
static void
arge_attach_sysctl(device_t dev)
{
struct arge_softc *sc = device_get_softc(dev);
struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(dev);
struct sysctl_oid *tree = device_get_sysctl_tree(dev);
#ifdef ARGE_DEBUG
SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
"debug", CTLFLAG_RW, &sc->arge_debug, 0,
"arge interface debugging flags");
#endif
SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
"tx_pkts_aligned", CTLFLAG_RW, &sc->stats.tx_pkts_aligned, 0,
"number of TX aligned packets");
SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
"tx_pkts_unaligned", CTLFLAG_RW, &sc->stats.tx_pkts_unaligned,
0, "number of TX unaligned packets");
#ifdef ARGE_DEBUG
SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "tx_prod",
CTLFLAG_RW, &sc->arge_cdata.arge_tx_prod, 0, "");
SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "tx_cons",
CTLFLAG_RW, &sc->arge_cdata.arge_tx_cons, 0, "");
SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "tx_cnt",
CTLFLAG_RW, &sc->arge_cdata.arge_tx_cnt, 0, "");
#endif
}
static int
arge_attach(device_t dev)
{
uint8_t eaddr[ETHER_ADDR_LEN];
struct ifnet *ifp;
struct arge_softc *sc;
int error = 0, rid, phymask;
uint32_t reg, rnd;
int is_base_mac_empty, i, phys_total;
uint32_t hint;
long eeprom_mac_addr = 0;
sc = device_get_softc(dev);
sc->arge_dev = dev;
sc->arge_mac_unit = device_get_unit(dev);
/*
* Some units (eg the TP-Link WR-1043ND) do not have a convenient
* EEPROM location to read the ethernet MAC address from.
* OpenWRT simply snaffles it from a fixed location.
*
* Since multiple units seem to use this feature, include
* a method of setting the MAC address based on an flash location
* in CPU address space.
*/
if (sc->arge_mac_unit == 0 &&
resource_long_value(device_get_name(dev), device_get_unit(dev),
"eeprommac", &eeprom_mac_addr) == 0) {
int i;
const char *mac =
(const char *) MIPS_PHYS_TO_KSEG1(eeprom_mac_addr);
device_printf(dev, "Overriding MAC from EEPROM\n");
for (i = 0; i < 6; i++) {
ar711_base_mac[i] = mac[i];
}
}
KASSERT(((sc->arge_mac_unit == 0) || (sc->arge_mac_unit == 1)),
("if_arge: Only MAC0 and MAC1 supported"));
/*
* Get which PHY of 5 available we should use for this unit
*/
if (resource_int_value(device_get_name(dev), device_get_unit(dev),
"phymask", &phymask) != 0) {
/*
* Use port 4 (WAN) for GE0. For any other port use
* its PHY the same as its unit number
*/
if (sc->arge_mac_unit == 0)
phymask = (1 << 4);
else
/* Use all phys up to 4 */
phymask = (1 << 4) - 1;
device_printf(dev, "No PHY specified, using mask %d\n",
phymask);
}
/*
* Get default media & duplex mode, by default its Base100T
* and full duplex
*/
if (resource_int_value(device_get_name(dev), device_get_unit(dev),
"media", &hint) != 0)
hint = 0;
if (hint == 1000)
sc->arge_media_type = IFM_1000_T;
else
sc->arge_media_type = IFM_100_TX;
if (resource_int_value(device_get_name(dev), device_get_unit(dev),
"fduplex", &hint) != 0)
hint = 1;
if (hint)
sc->arge_duplex_mode = IFM_FDX;
else
sc->arge_duplex_mode = 0;
sc->arge_phymask = phymask;
mtx_init(&sc->arge_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
MTX_DEF);
callout_init_mtx(&sc->arge_stat_callout, &sc->arge_mtx, 0);
TASK_INIT(&sc->arge_link_task, 0, arge_link_task, sc);
/* Map control/status registers. */
sc->arge_rid = 0;
sc->arge_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&sc->arge_rid, RF_ACTIVE);
if (sc->arge_res == NULL) {
device_printf(dev, "couldn't map memory\n");
error = ENXIO;
goto fail;
}
/* Allocate interrupts */
rid = 0;
sc->arge_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_SHAREABLE | RF_ACTIVE);
if (sc->arge_irq == NULL) {
device_printf(dev, "couldn't map interrupt\n");
error = ENXIO;
goto fail;
}
/* Allocate ifnet structure. */
ifp = sc->arge_ifp = if_alloc(IFT_ETHER);
if (ifp == NULL) {
device_printf(dev, "couldn't 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 = arge_ioctl;
ifp->if_start = arge_start;
ifp->if_init = arge_init;
sc->arge_if_flags = ifp->if_flags;
/* XXX: add real size */
IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen);
ifp->if_snd.ifq_maxlen = ifqmaxlen;
IFQ_SET_READY(&ifp->if_snd);
ifp->if_capenable = ifp->if_capabilities;
#ifdef DEVICE_POLLING
ifp->if_capabilities |= IFCAP_POLLING;
#endif
is_base_mac_empty = 1;
for (i = 0; i < ETHER_ADDR_LEN; i++) {
eaddr[i] = ar711_base_mac[i] & 0xff;
if (eaddr[i] != 0)
is_base_mac_empty = 0;
}
if (is_base_mac_empty) {
/*
* No MAC address configured. Generate the random one.
*/
if (bootverbose)
device_printf(dev,
"Generating random ethernet address.\n");
rnd = arc4random();
eaddr[0] = 'b';
eaddr[1] = 's';
eaddr[2] = 'd';
eaddr[3] = (rnd >> 24) & 0xff;
eaddr[4] = (rnd >> 16) & 0xff;
eaddr[5] = (rnd >> 8) & 0xff;
}
if (sc->arge_mac_unit != 0)
eaddr[5] += sc->arge_mac_unit;
if (arge_dma_alloc(sc) != 0) {
error = ENXIO;
goto fail;
}
/* Initialize the MAC block */
/* Step 1. Soft-reset MAC */
ARGE_SET_BITS(sc, AR71XX_MAC_CFG1, MAC_CFG1_SOFT_RESET);
DELAY(20);
/* Step 2. Punt the MAC core from the central reset register */
ar71xx_device_stop(sc->arge_mac_unit == 0 ? RST_RESET_GE0_MAC :
RST_RESET_GE1_MAC);
DELAY(100);
ar71xx_device_start(sc->arge_mac_unit == 0 ? RST_RESET_GE0_MAC :
RST_RESET_GE1_MAC);
/* Step 3. Reconfigure MAC block */
ARGE_WRITE(sc, AR71XX_MAC_CFG1,
MAC_CFG1_SYNC_RX | MAC_CFG1_RX_ENABLE |
MAC_CFG1_SYNC_TX | MAC_CFG1_TX_ENABLE);
reg = ARGE_READ(sc, AR71XX_MAC_CFG2);
reg |= MAC_CFG2_ENABLE_PADCRC | MAC_CFG2_LENGTH_FIELD ;
ARGE_WRITE(sc, AR71XX_MAC_CFG2, reg);
ARGE_WRITE(sc, AR71XX_MAC_MAX_FRAME_LEN, 1536);
/* Reset MII bus */
ARGE_WRITE(sc, AR71XX_MAC_MII_CFG, MAC_MII_CFG_RESET);
DELAY(100);
ARGE_WRITE(sc, AR71XX_MAC_MII_CFG, MAC_MII_CFG_CLOCK_DIV_28);
DELAY(100);
/*
* Set all Ethernet address registers to the same initial values
* set all four addresses to 66-88-aa-cc-dd-ee
*/
ARGE_WRITE(sc, AR71XX_MAC_STA_ADDR1,
(eaddr[2] << 24) | (eaddr[3] << 16) | (eaddr[4] << 8) | eaddr[5]);
ARGE_WRITE(sc, AR71XX_MAC_STA_ADDR2, (eaddr[0] << 8) | eaddr[1]);
ARGE_WRITE(sc, AR71XX_MAC_FIFO_CFG0,
FIFO_CFG0_ALL << FIFO_CFG0_ENABLE_SHIFT);
switch (ar71xx_soc) {
case AR71XX_SOC_AR7240:
case AR71XX_SOC_AR7241:
case AR71XX_SOC_AR7242:
ARGE_WRITE(sc, AR71XX_MAC_FIFO_CFG1, 0x0010ffff);
ARGE_WRITE(sc, AR71XX_MAC_FIFO_CFG2, 0x015500aa);
break;
default:
ARGE_WRITE(sc, AR71XX_MAC_FIFO_CFG1, 0x0fff0000);
ARGE_WRITE(sc, AR71XX_MAC_FIFO_CFG2, 0x00001fff);
}
ARGE_WRITE(sc, AR71XX_MAC_FIFO_RX_FILTMATCH,
FIFO_RX_FILTMATCH_DEFAULT);
ARGE_WRITE(sc, AR71XX_MAC_FIFO_RX_FILTMASK,
FIFO_RX_FILTMASK_DEFAULT);
/*
* Check if we have single-PHY MAC or multi-PHY
*/
phys_total = 0;
for (i = 0; i < ARGE_NPHY; i++)
if (phymask & (1 << i))
phys_total ++;
if (phys_total == 0) {
error = EINVAL;
goto fail;
}
if (phys_total == 1) {
/* Do MII setup. */
error = mii_attach(dev, &sc->arge_miibus, ifp,
arge_ifmedia_upd, arge_ifmedia_sts, BMSR_DEFCAPMASK,
MII_PHY_ANY, MII_OFFSET_ANY, 0);
if (error != 0) {
device_printf(dev, "attaching PHYs failed\n");
goto fail;
}
}
else {
ifmedia_init(&sc->arge_ifmedia, 0,
arge_multiphy_mediachange,
arge_multiphy_mediastatus);
ifmedia_add(&sc->arge_ifmedia,
IFM_ETHER | sc->arge_media_type | sc->arge_duplex_mode,
0, NULL);
ifmedia_set(&sc->arge_ifmedia,
IFM_ETHER | sc->arge_media_type | sc->arge_duplex_mode);
arge_set_pll(sc, sc->arge_media_type, sc->arge_duplex_mode);
}
/* Call MI attach routine. */
ether_ifattach(ifp, eaddr);
/* Hook interrupt last to avoid having to lock softc */
error = bus_setup_intr(dev, sc->arge_irq, INTR_TYPE_NET | INTR_MPSAFE,
arge_intr_filter, arge_intr, sc, &sc->arge_intrhand);
if (error) {
device_printf(dev, "couldn't set up irq\n");
ether_ifdetach(ifp);
goto fail;
}
/* setup sysctl variables */
arge_attach_sysctl(dev);
fail:
if (error)
arge_detach(dev);
return (error);
}
static int
arge_detach(device_t dev)
{
struct arge_softc *sc = device_get_softc(dev);
struct ifnet *ifp = sc->arge_ifp;
KASSERT(mtx_initialized(&sc->arge_mtx),
("arge mutex not initialized"));
/* These should only be active if attach succeeded */
if (device_is_attached(dev)) {
ARGE_LOCK(sc);
sc->arge_detach = 1;
#ifdef DEVICE_POLLING
if (ifp->if_capenable & IFCAP_POLLING)
ether_poll_deregister(ifp);
#endif
arge_stop(sc);
ARGE_UNLOCK(sc);
taskqueue_drain(taskqueue_swi, &sc->arge_link_task);
ether_ifdetach(ifp);
}
if (sc->arge_miibus)
device_delete_child(dev, sc->arge_miibus);
bus_generic_detach(dev);
if (sc->arge_intrhand)
bus_teardown_intr(dev, sc->arge_irq, sc->arge_intrhand);
if (sc->arge_res)
bus_release_resource(dev, SYS_RES_MEMORY, sc->arge_rid,
sc->arge_res);
if (ifp)
if_free(ifp);
arge_dma_free(sc);
mtx_destroy(&sc->arge_mtx);
return (0);
}
static int
arge_suspend(device_t dev)
{
panic("%s", __func__);
return 0;
}
static int
arge_resume(device_t dev)
{
panic("%s", __func__);
return 0;
}
static int
arge_shutdown(device_t dev)
{
struct arge_softc *sc;
sc = device_get_softc(dev);
ARGE_LOCK(sc);
arge_stop(sc);
ARGE_UNLOCK(sc);
return (0);
}
static int
arge_miibus_readreg(device_t dev, int phy, int reg)
{
struct arge_softc * sc = device_get_softc(dev);
int i, result;
uint32_t addr = (phy << MAC_MII_PHY_ADDR_SHIFT)
| (reg & MAC_MII_REG_MASK);
if ((sc->arge_phymask & (1 << phy)) == 0)
return (0);
mtx_lock(&miibus_mtx);
ARGE_MII_WRITE(AR71XX_MAC_MII_CMD, MAC_MII_CMD_WRITE);
ARGE_MII_WRITE(AR71XX_MAC_MII_ADDR, addr);
ARGE_MII_WRITE(AR71XX_MAC_MII_CMD, MAC_MII_CMD_READ);
i = ARGE_MII_TIMEOUT;
while ((ARGE_MII_READ(AR71XX_MAC_MII_INDICATOR) &
MAC_MII_INDICATOR_BUSY) && (i--))
DELAY(5);
if (i < 0) {
mtx_unlock(&miibus_mtx);
ARGEDEBUG(sc, ARGE_DBG_MII, "%s timedout\n", __func__);
/* XXX: return ERRNO istead? */
return (-1);
}
result = ARGE_MII_READ(AR71XX_MAC_MII_STATUS) & MAC_MII_STATUS_MASK;
ARGE_MII_WRITE(AR71XX_MAC_MII_CMD, MAC_MII_CMD_WRITE);
mtx_unlock(&miibus_mtx);
ARGEDEBUG(sc, ARGE_DBG_MII,
"%s: phy=%d, reg=%02x, value[%08x]=%04x\n",
__func__, phy, reg, addr, result);
return (result);
}
static int
arge_miibus_writereg(device_t dev, int phy, int reg, int data)
{
struct arge_softc * sc = device_get_softc(dev);
int i;
uint32_t addr =
(phy << MAC_MII_PHY_ADDR_SHIFT) | (reg & MAC_MII_REG_MASK);
if ((sc->arge_phymask & (1 << phy)) == 0)
return (-1);
ARGEDEBUG(sc, ARGE_DBG_MII, "%s: phy=%d, reg=%02x, value=%04x\n",
__func__, phy, reg, data);
mtx_lock(&miibus_mtx);
ARGE_MII_WRITE(AR71XX_MAC_MII_ADDR, addr);
ARGE_MII_WRITE(AR71XX_MAC_MII_CONTROL, data);
i = ARGE_MII_TIMEOUT;
while ((ARGE_MII_READ(AR71XX_MAC_MII_INDICATOR) &
MAC_MII_INDICATOR_BUSY) && (i--))
DELAY(5);
mtx_unlock(&miibus_mtx);
if (i < 0) {
ARGEDEBUG(sc, ARGE_DBG_MII, "%s timedout\n", __func__);
/* XXX: return ERRNO istead? */
return (-1);
}
return (0);
}
static void
arge_miibus_statchg(device_t dev)
{
struct arge_softc *sc;
sc = device_get_softc(dev);
taskqueue_enqueue(taskqueue_swi, &sc->arge_link_task);
}
static void
arge_link_task(void *arg, int pending)
{
struct arge_softc *sc;
sc = (struct arge_softc *)arg;
ARGE_LOCK(sc);
arge_update_link_locked(sc);
ARGE_UNLOCK(sc);
}
static void
arge_update_link_locked(struct arge_softc *sc)
{
struct mii_data *mii;
struct ifnet *ifp;
uint32_t media, duplex;
mii = device_get_softc(sc->arge_miibus);
ifp = sc->arge_ifp;
if (mii == NULL || ifp == NULL ||
(ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
return;
}
if (mii->mii_media_status & IFM_ACTIVE) {
media = IFM_SUBTYPE(mii->mii_media_active);
if (media != IFM_NONE) {
sc->arge_link_status = 1;
duplex = mii->mii_media_active & IFM_GMASK;
arge_set_pll(sc, media, duplex);
}
} else {
sc->arge_link_status = 0;
}
}
static void
arge_set_pll(struct arge_softc *sc, int media, int duplex)
{
uint32_t cfg, ifcontrol, rx_filtmask;
uint32_t fifo_tx;
int if_speed;
cfg = ARGE_READ(sc, AR71XX_MAC_CFG2);
cfg &= ~(MAC_CFG2_IFACE_MODE_1000
| MAC_CFG2_IFACE_MODE_10_100
| MAC_CFG2_FULL_DUPLEX);
if (duplex == IFM_FDX)
cfg |= MAC_CFG2_FULL_DUPLEX;
ifcontrol = ARGE_READ(sc, AR71XX_MAC_IFCONTROL);
ifcontrol &= ~MAC_IFCONTROL_SPEED;
rx_filtmask =
ARGE_READ(sc, AR71XX_MAC_FIFO_RX_FILTMASK);
rx_filtmask &= ~FIFO_RX_MASK_BYTE_MODE;
switch(media) {
case IFM_10_T:
cfg |= MAC_CFG2_IFACE_MODE_10_100;
if_speed = 10;
break;
case IFM_100_TX:
cfg |= MAC_CFG2_IFACE_MODE_10_100;
ifcontrol |= MAC_IFCONTROL_SPEED;
if_speed = 100;
break;
case IFM_1000_T:
case IFM_1000_SX:
cfg |= MAC_CFG2_IFACE_MODE_1000;
rx_filtmask |= FIFO_RX_MASK_BYTE_MODE;
if_speed = 1000;
break;
default:
if_speed = 100;
device_printf(sc->arge_dev,
"Unknown media %d\n", media);
}
switch (ar71xx_soc) {
case AR71XX_SOC_AR7240:
case AR71XX_SOC_AR7241:
case AR71XX_SOC_AR7242:
fifo_tx = 0x01f00140;
break;
case AR71XX_SOC_AR9130:
case AR71XX_SOC_AR9132:
fifo_tx = 0x00780fff;
break;
default:
fifo_tx = 0x008001ff;
}
ARGE_WRITE(sc, AR71XX_MAC_CFG2, cfg);
ARGE_WRITE(sc, AR71XX_MAC_IFCONTROL, ifcontrol);
ARGE_WRITE(sc, AR71XX_MAC_FIFO_RX_FILTMASK,
rx_filtmask);
ARGE_WRITE(sc, AR71XX_MAC_FIFO_TX_THRESHOLD, fifo_tx);
/* set PLL registers */
ar71xx_device_set_pll_ge(sc->arge_mac_unit, if_speed);
}
static void
arge_reset_dma(struct arge_softc *sc)
{
ARGE_WRITE(sc, AR71XX_DMA_RX_CONTROL, 0);
ARGE_WRITE(sc, AR71XX_DMA_TX_CONTROL, 0);
ARGE_WRITE(sc, AR71XX_DMA_RX_DESC, 0);
ARGE_WRITE(sc, AR71XX_DMA_TX_DESC, 0);
/* Clear all possible RX interrupts */
while(ARGE_READ(sc, AR71XX_DMA_RX_STATUS) & DMA_RX_STATUS_PKT_RECVD)
ARGE_WRITE(sc, AR71XX_DMA_RX_STATUS, DMA_RX_STATUS_PKT_RECVD);
/*
* Clear all possible TX interrupts
*/
while(ARGE_READ(sc, AR71XX_DMA_TX_STATUS) & DMA_TX_STATUS_PKT_SENT)
ARGE_WRITE(sc, AR71XX_DMA_TX_STATUS, DMA_TX_STATUS_PKT_SENT);
/*
* Now Rx/Tx errors
*/
ARGE_WRITE(sc, AR71XX_DMA_RX_STATUS,
DMA_RX_STATUS_BUS_ERROR | DMA_RX_STATUS_OVERFLOW);
ARGE_WRITE(sc, AR71XX_DMA_TX_STATUS,
DMA_TX_STATUS_BUS_ERROR | DMA_TX_STATUS_UNDERRUN);
/*
* Force a DDR flush so any pending data is properly
* flushed to RAM before underlying buffers are freed.
*/
arge_flush_ddr(sc);
}
static void
arge_init(void *xsc)
{
struct arge_softc *sc = xsc;
ARGE_LOCK(sc);
arge_init_locked(sc);
ARGE_UNLOCK(sc);
}
static void
arge_init_locked(struct arge_softc *sc)
{
struct ifnet *ifp = sc->arge_ifp;
struct mii_data *mii;
ARGE_LOCK_ASSERT(sc);
arge_stop(sc);
/* Init circular RX list. */
if (arge_rx_ring_init(sc) != 0) {
device_printf(sc->arge_dev,
"initialization failed: no memory for rx buffers\n");
arge_stop(sc);
return;
}
/* Init tx descriptors. */
arge_tx_ring_init(sc);
arge_reset_dma(sc);
if (sc->arge_miibus) {
mii = device_get_softc(sc->arge_miibus);
mii_mediachg(mii);
}
else {
/*
* Sun always shines over multiPHY interface
*/
sc->arge_link_status = 1;
}
ifp->if_drv_flags |= IFF_DRV_RUNNING;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
if (sc->arge_miibus) {
callout_reset(&sc->arge_stat_callout, hz, arge_tick, sc);
arge_update_link_locked(sc);
}
ARGE_WRITE(sc, AR71XX_DMA_TX_DESC, ARGE_TX_RING_ADDR(sc, 0));
ARGE_WRITE(sc, AR71XX_DMA_RX_DESC, ARGE_RX_RING_ADDR(sc, 0));
/* Start listening */
ARGE_WRITE(sc, AR71XX_DMA_RX_CONTROL, DMA_RX_CONTROL_EN);
/* Enable interrupts */
ARGE_WRITE(sc, AR71XX_DMA_INTR, DMA_INTR_ALL);
}
/*
* Return whether the mbuf chain is correctly aligned
* for the arge TX engine.
*
* The TX engine requires each fragment to be aligned to a
* 4 byte boundary and the size of each fragment except
* the last to be a multiple of 4 bytes.
*/
static int
arge_mbuf_chain_is_tx_aligned(struct mbuf *m0)
{
struct mbuf *m;
for (m = m0; m != NULL; m = m->m_next) {
if((mtod(m, intptr_t) & 3) != 0)
return 0;
if ((m->m_next != NULL) && ((m->m_len & 0x03) != 0))
return 0;
}
return 1;
}
/*
* Encapsulate an mbuf chain in a descriptor by coupling the mbuf data
* pointers to the fragment pointers.
*/
static int
arge_encap(struct arge_softc *sc, struct mbuf **m_head)
{
struct arge_txdesc *txd;
struct arge_desc *desc, *prev_desc;
bus_dma_segment_t txsegs[ARGE_MAXFRAGS];
int error, i, nsegs, prod, prev_prod;
struct mbuf *m;
ARGE_LOCK_ASSERT(sc);
/*
* Fix mbuf chain, all fragments should be 4 bytes aligned and
* even 4 bytes
*/
m = *m_head;
if (! arge_mbuf_chain_is_tx_aligned(m)) {
sc->stats.tx_pkts_unaligned++;
m = m_defrag(*m_head, M_DONTWAIT);
if (m == NULL) {
*m_head = NULL;
return (ENOBUFS);
}
*m_head = m;
} else
sc->stats.tx_pkts_aligned++;
prod = sc->arge_cdata.arge_tx_prod;
txd = &sc->arge_cdata.arge_txdesc[prod];
error = bus_dmamap_load_mbuf_sg(sc->arge_cdata.arge_tx_tag,
txd->tx_dmamap, *m_head, txsegs, &nsegs, BUS_DMA_NOWAIT);
if (error == EFBIG) {
panic("EFBIG");
} 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->arge_cdata.arge_tx_cnt + nsegs >= (ARGE_TX_RING_COUNT - 1)) {
bus_dmamap_unload(sc->arge_cdata.arge_tx_tag, txd->tx_dmamap);
return (ENOBUFS);
}
txd->tx_m = *m_head;
bus_dmamap_sync(sc->arge_cdata.arge_tx_tag, txd->tx_dmamap,
BUS_DMASYNC_PREWRITE);
/*
* Make a list of descriptors for this packet. DMA controller will
* walk through it while arge_link is not zero.
*/
prev_prod = prod;
desc = prev_desc = NULL;
for (i = 0; i < nsegs; i++) {
desc = &sc->arge_rdata.arge_tx_ring[prod];
desc->packet_ctrl = ARGE_DMASIZE(txsegs[i].ds_len);
if (txsegs[i].ds_addr & 3)
panic("TX packet address unaligned\n");
desc->packet_addr = txsegs[i].ds_addr;
/* link with previous descriptor */
if (prev_desc)
prev_desc->packet_ctrl |= ARGE_DESC_MORE;
sc->arge_cdata.arge_tx_cnt++;
prev_desc = desc;
ARGE_INC(prod, ARGE_TX_RING_COUNT);
}
/* Update producer index. */
sc->arge_cdata.arge_tx_prod = prod;
/* Sync descriptors. */
bus_dmamap_sync(sc->arge_cdata.arge_tx_ring_tag,
sc->arge_cdata.arge_tx_ring_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
/* Start transmitting */
ARGEDEBUG(sc, ARGE_DBG_TX, "%s: setting DMA_TX_CONTROL_EN\n",
__func__);
ARGE_WRITE(sc, AR71XX_DMA_TX_CONTROL, DMA_TX_CONTROL_EN);
return (0);
}
static void
arge_start(struct ifnet *ifp)
{
struct arge_softc *sc;
sc = ifp->if_softc;
ARGE_LOCK(sc);
arge_start_locked(ifp);
ARGE_UNLOCK(sc);
}
static void
arge_start_locked(struct ifnet *ifp)
{
struct arge_softc *sc;
struct mbuf *m_head;
int enq = 0;
sc = ifp->if_softc;
ARGE_LOCK_ASSERT(sc);
ARGEDEBUG(sc, ARGE_DBG_TX, "%s: beginning\n", __func__);
if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
IFF_DRV_RUNNING || sc->arge_link_status == 0 )
return;
/*
* Before we go any further, check whether we're already full.
* The below check errors out immediately if the ring is full
* and never gets a chance to set this flag. Although it's
* likely never needed, this at least avoids an unexpected
* situation.
*/
if (sc->arge_cdata.arge_tx_cnt >= ARGE_TX_RING_COUNT - 2) {
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
ARGEDEBUG(sc, ARGE_DBG_ERR,
"%s: tx_cnt %d >= max %d; setting IFF_DRV_OACTIVE\n",
__func__, sc->arge_cdata.arge_tx_cnt,
ARGE_TX_RING_COUNT - 2);
return;
}
arge_flush_ddr(sc);
for (enq = 0; !IFQ_DRV_IS_EMPTY(&ifp->if_snd) &&
sc->arge_cdata.arge_tx_cnt < ARGE_TX_RING_COUNT - 2; ) {
IFQ_DRV_DEQUEUE(&ifp->if_snd, m_head);
if (m_head == NULL)
break;
/*
* Pack the data into the transmit ring.
*/
if (arge_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);
}
ARGEDEBUG(sc, ARGE_DBG_TX, "%s: finished; queued %d packets\n",
__func__, enq);
}
static void
arge_stop(struct arge_softc *sc)
{
struct ifnet *ifp;
ARGE_LOCK_ASSERT(sc);
ifp = sc->arge_ifp;
ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
if (sc->arge_miibus)
callout_stop(&sc->arge_stat_callout);
/* mask out interrupts */
ARGE_WRITE(sc, AR71XX_DMA_INTR, 0);
arge_reset_dma(sc);
/* Flush FIFO and free any existing mbufs */
arge_flush_ddr(sc);
arge_rx_ring_free(sc);
}
static int
arge_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
{
struct arge_softc *sc = ifp->if_softc;
struct ifreq *ifr = (struct ifreq *) data;
struct mii_data *mii;
int error;
#ifdef DEVICE_POLLING
int mask;
#endif
switch (command) {
case SIOCSIFFLAGS:
ARGE_LOCK(sc);
if ((ifp->if_flags & IFF_UP) != 0) {
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) {
if (((ifp->if_flags ^ sc->arge_if_flags)
& (IFF_PROMISC | IFF_ALLMULTI)) != 0) {
/* XXX: handle promisc & multi flags */
}
} else {
if (!sc->arge_detach)
arge_init_locked(sc);
}
} else if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) {
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
arge_stop(sc);
}
sc->arge_if_flags = ifp->if_flags;
ARGE_UNLOCK(sc);
error = 0;
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
/* XXX: implement SIOCDELMULTI */
error = 0;
break;
case SIOCGIFMEDIA:
case SIOCSIFMEDIA:
if (sc->arge_miibus) {
mii = device_get_softc(sc->arge_miibus);
error = ifmedia_ioctl(ifp, ifr, &mii->mii_media,
command);
}
else
error = ifmedia_ioctl(ifp, ifr, &sc->arge_ifmedia,
command);
break;
case SIOCSIFCAP:
/* XXX: Check other capabilities */
#ifdef DEVICE_POLLING
mask = ifp->if_capenable ^ ifr->ifr_reqcap;
if (mask & IFCAP_POLLING) {
if (ifr->ifr_reqcap & IFCAP_POLLING) {
ARGE_WRITE(sc, AR71XX_DMA_INTR, 0);
error = ether_poll_register(arge_poll, ifp);
if (error)
return error;
ARGE_LOCK(sc);
ifp->if_capenable |= IFCAP_POLLING;
ARGE_UNLOCK(sc);
} else {
ARGE_WRITE(sc, AR71XX_DMA_INTR, DMA_INTR_ALL);
error = ether_poll_deregister(ifp);
ARGE_LOCK(sc);
ifp->if_capenable &= ~IFCAP_POLLING;
ARGE_UNLOCK(sc);
}
}
error = 0;
break;
#endif
default:
error = ether_ioctl(ifp, command, data);
break;
}
return (error);
}
/*
* Set media options.
*/
static int
arge_ifmedia_upd(struct ifnet *ifp)
{
struct arge_softc *sc;
struct mii_data *mii;
struct mii_softc *miisc;
int error;
sc = ifp->if_softc;
ARGE_LOCK(sc);
mii = device_get_softc(sc->arge_miibus);
LIST_FOREACH(miisc, &mii->mii_phys, mii_list)
PHY_RESET(miisc);
error = mii_mediachg(mii);
ARGE_UNLOCK(sc);
return (error);
}
/*
* Report current media status.
*/
static void
arge_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
{
struct arge_softc *sc = ifp->if_softc;
struct mii_data *mii;
mii = device_get_softc(sc->arge_miibus);
ARGE_LOCK(sc);
mii_pollstat(mii);
ifmr->ifm_active = mii->mii_media_active;
ifmr->ifm_status = mii->mii_media_status;
ARGE_UNLOCK(sc);
}
struct arge_dmamap_arg {
bus_addr_t arge_busaddr;
};
static void
arge_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
struct arge_dmamap_arg *ctx;
if (error != 0)
return;
ctx = arg;
ctx->arge_busaddr = segs[0].ds_addr;
}
static int
arge_dma_alloc(struct arge_softc *sc)
{
struct arge_dmamap_arg ctx;
struct arge_txdesc *txd;
struct arge_rxdesc *rxd;
int error, i;
/* Create parent DMA tag. */
error = bus_dma_tag_create(
bus_get_dma_tag(sc->arge_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->arge_cdata.arge_parent_tag);
if (error != 0) {
device_printf(sc->arge_dev,
"failed to create parent DMA tag\n");
goto fail;
}
/* Create tag for Tx ring. */
error = bus_dma_tag_create(
sc->arge_cdata.arge_parent_tag, /* parent */
ARGE_RING_ALIGN, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
ARGE_TX_DMA_SIZE, /* maxsize */
1, /* nsegments */
ARGE_TX_DMA_SIZE, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->arge_cdata.arge_tx_ring_tag);
if (error != 0) {
device_printf(sc->arge_dev,
"failed to create Tx ring DMA tag\n");
goto fail;
}
/* Create tag for Rx ring. */
error = bus_dma_tag_create(
sc->arge_cdata.arge_parent_tag, /* parent */
ARGE_RING_ALIGN, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
ARGE_RX_DMA_SIZE, /* maxsize */
1, /* nsegments */
ARGE_RX_DMA_SIZE, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->arge_cdata.arge_rx_ring_tag);
if (error != 0) {
device_printf(sc->arge_dev,
"failed to create Rx ring DMA tag\n");
goto fail;
}
/* Create tag for Tx buffers. */
error = bus_dma_tag_create(
sc->arge_cdata.arge_parent_tag, /* parent */
sizeof(uint32_t), 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
MCLBYTES * ARGE_MAXFRAGS, /* maxsize */
ARGE_MAXFRAGS, /* nsegments */
MCLBYTES, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->arge_cdata.arge_tx_tag);
if (error != 0) {
device_printf(sc->arge_dev, "failed to create Tx DMA tag\n");
goto fail;
}
/* Create tag for Rx buffers. */
error = bus_dma_tag_create(
sc->arge_cdata.arge_parent_tag, /* parent */
ARGE_RX_ALIGN, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
MCLBYTES, /* maxsize */
ARGE_MAXFRAGS, /* nsegments */
MCLBYTES, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->arge_cdata.arge_rx_tag);
if (error != 0) {
device_printf(sc->arge_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->arge_cdata.arge_tx_ring_tag,
(void **)&sc->arge_rdata.arge_tx_ring, BUS_DMA_WAITOK |
BUS_DMA_COHERENT | BUS_DMA_ZERO,
&sc->arge_cdata.arge_tx_ring_map);
if (error != 0) {
device_printf(sc->arge_dev,
"failed to allocate DMA'able memory for Tx ring\n");
goto fail;
}
ctx.arge_busaddr = 0;
error = bus_dmamap_load(sc->arge_cdata.arge_tx_ring_tag,
sc->arge_cdata.arge_tx_ring_map, sc->arge_rdata.arge_tx_ring,
ARGE_TX_DMA_SIZE, arge_dmamap_cb, &ctx, 0);
if (error != 0 || ctx.arge_busaddr == 0) {
device_printf(sc->arge_dev,
"failed to load DMA'able memory for Tx ring\n");
goto fail;
}
sc->arge_rdata.arge_tx_ring_paddr = ctx.arge_busaddr;
/* Allocate DMA'able memory and load the DMA map for Rx ring. */
error = bus_dmamem_alloc(sc->arge_cdata.arge_rx_ring_tag,
(void **)&sc->arge_rdata.arge_rx_ring, BUS_DMA_WAITOK |
BUS_DMA_COHERENT | BUS_DMA_ZERO,
&sc->arge_cdata.arge_rx_ring_map);
if (error != 0) {
device_printf(sc->arge_dev,
"failed to allocate DMA'able memory for Rx ring\n");
goto fail;
}
ctx.arge_busaddr = 0;
error = bus_dmamap_load(sc->arge_cdata.arge_rx_ring_tag,
sc->arge_cdata.arge_rx_ring_map, sc->arge_rdata.arge_rx_ring,
ARGE_RX_DMA_SIZE, arge_dmamap_cb, &ctx, 0);
if (error != 0 || ctx.arge_busaddr == 0) {
device_printf(sc->arge_dev,
"failed to load DMA'able memory for Rx ring\n");
goto fail;
}
sc->arge_rdata.arge_rx_ring_paddr = ctx.arge_busaddr;
/* Create DMA maps for Tx buffers. */
for (i = 0; i < ARGE_TX_RING_COUNT; i++) {
txd = &sc->arge_cdata.arge_txdesc[i];
txd->tx_m = NULL;
txd->tx_dmamap = NULL;
error = bus_dmamap_create(sc->arge_cdata.arge_tx_tag, 0,
&txd->tx_dmamap);
if (error != 0) {
device_printf(sc->arge_dev,
"failed to create Tx dmamap\n");
goto fail;
}
}
/* Create DMA maps for Rx buffers. */
if ((error = bus_dmamap_create(sc->arge_cdata.arge_rx_tag, 0,
&sc->arge_cdata.arge_rx_sparemap)) != 0) {
device_printf(sc->arge_dev,
"failed to create spare Rx dmamap\n");
goto fail;
}
for (i = 0; i < ARGE_RX_RING_COUNT; i++) {
rxd = &sc->arge_cdata.arge_rxdesc[i];
rxd->rx_m = NULL;
rxd->rx_dmamap = NULL;
error = bus_dmamap_create(sc->arge_cdata.arge_rx_tag, 0,
&rxd->rx_dmamap);
if (error != 0) {
device_printf(sc->arge_dev,
"failed to create Rx dmamap\n");
goto fail;
}
}
fail:
return (error);
}
static void
arge_dma_free(struct arge_softc *sc)
{
struct arge_txdesc *txd;
struct arge_rxdesc *rxd;
int i;
/* Tx ring. */
if (sc->arge_cdata.arge_tx_ring_tag) {
if (sc->arge_cdata.arge_tx_ring_map)
bus_dmamap_unload(sc->arge_cdata.arge_tx_ring_tag,
sc->arge_cdata.arge_tx_ring_map);
if (sc->arge_cdata.arge_tx_ring_map &&
sc->arge_rdata.arge_tx_ring)
bus_dmamem_free(sc->arge_cdata.arge_tx_ring_tag,
sc->arge_rdata.arge_tx_ring,
sc->arge_cdata.arge_tx_ring_map);
sc->arge_rdata.arge_tx_ring = NULL;
sc->arge_cdata.arge_tx_ring_map = NULL;
bus_dma_tag_destroy(sc->arge_cdata.arge_tx_ring_tag);
sc->arge_cdata.arge_tx_ring_tag = NULL;
}
/* Rx ring. */
if (sc->arge_cdata.arge_rx_ring_tag) {
if (sc->arge_cdata.arge_rx_ring_map)
bus_dmamap_unload(sc->arge_cdata.arge_rx_ring_tag,
sc->arge_cdata.arge_rx_ring_map);
if (sc->arge_cdata.arge_rx_ring_map &&
sc->arge_rdata.arge_rx_ring)
bus_dmamem_free(sc->arge_cdata.arge_rx_ring_tag,
sc->arge_rdata.arge_rx_ring,
sc->arge_cdata.arge_rx_ring_map);
sc->arge_rdata.arge_rx_ring = NULL;
sc->arge_cdata.arge_rx_ring_map = NULL;
bus_dma_tag_destroy(sc->arge_cdata.arge_rx_ring_tag);
sc->arge_cdata.arge_rx_ring_tag = NULL;
}
/* Tx buffers. */
if (sc->arge_cdata.arge_tx_tag) {
for (i = 0; i < ARGE_TX_RING_COUNT; i++) {
txd = &sc->arge_cdata.arge_txdesc[i];
if (txd->tx_dmamap) {
bus_dmamap_destroy(sc->arge_cdata.arge_tx_tag,
txd->tx_dmamap);
txd->tx_dmamap = NULL;
}
}
bus_dma_tag_destroy(sc->arge_cdata.arge_tx_tag);
sc->arge_cdata.arge_tx_tag = NULL;
}
/* Rx buffers. */
if (sc->arge_cdata.arge_rx_tag) {
for (i = 0; i < ARGE_RX_RING_COUNT; i++) {
rxd = &sc->arge_cdata.arge_rxdesc[i];
if (rxd->rx_dmamap) {
bus_dmamap_destroy(sc->arge_cdata.arge_rx_tag,
rxd->rx_dmamap);
rxd->rx_dmamap = NULL;
}
}
if (sc->arge_cdata.arge_rx_sparemap) {
bus_dmamap_destroy(sc->arge_cdata.arge_rx_tag,
sc->arge_cdata.arge_rx_sparemap);
sc->arge_cdata.arge_rx_sparemap = 0;
}
bus_dma_tag_destroy(sc->arge_cdata.arge_rx_tag);
sc->arge_cdata.arge_rx_tag = NULL;
}
if (sc->arge_cdata.arge_parent_tag) {
bus_dma_tag_destroy(sc->arge_cdata.arge_parent_tag);
sc->arge_cdata.arge_parent_tag = NULL;
}
}
/*
* Initialize the transmit descriptors.
*/
static int
arge_tx_ring_init(struct arge_softc *sc)
{
struct arge_ring_data *rd;
struct arge_txdesc *txd;
bus_addr_t addr;
int i;
sc->arge_cdata.arge_tx_prod = 0;
sc->arge_cdata.arge_tx_cons = 0;
sc->arge_cdata.arge_tx_cnt = 0;
rd = &sc->arge_rdata;
bzero(rd->arge_tx_ring, sizeof(rd->arge_tx_ring));
for (i = 0; i < ARGE_TX_RING_COUNT; i++) {
if (i == ARGE_TX_RING_COUNT - 1)
addr = ARGE_TX_RING_ADDR(sc, 0);
else
addr = ARGE_TX_RING_ADDR(sc, i + 1);
rd->arge_tx_ring[i].packet_ctrl = ARGE_DESC_EMPTY;
rd->arge_tx_ring[i].next_desc = addr;
txd = &sc->arge_cdata.arge_txdesc[i];
txd->tx_m = NULL;
}
bus_dmamap_sync(sc->arge_cdata.arge_tx_ring_tag,
sc->arge_cdata.arge_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
arge_rx_ring_init(struct arge_softc *sc)
{
struct arge_ring_data *rd;
struct arge_rxdesc *rxd;
bus_addr_t addr;
int i;
sc->arge_cdata.arge_rx_cons = 0;
rd = &sc->arge_rdata;
bzero(rd->arge_rx_ring, sizeof(rd->arge_rx_ring));
for (i = 0; i < ARGE_RX_RING_COUNT; i++) {
rxd = &sc->arge_cdata.arge_rxdesc[i];
if (rxd->rx_m != NULL) {
device_printf(sc->arge_dev,
"%s: ring[%d] rx_m wasn't free?\n",
__func__,
i);
}
rxd->rx_m = NULL;
rxd->desc = &rd->arge_rx_ring[i];
if (i == ARGE_RX_RING_COUNT - 1)
addr = ARGE_RX_RING_ADDR(sc, 0);
else
addr = ARGE_RX_RING_ADDR(sc, i + 1);
rd->arge_rx_ring[i].next_desc = addr;
if (arge_newbuf(sc, i) != 0) {
return (ENOBUFS);
}
}
bus_dmamap_sync(sc->arge_cdata.arge_rx_ring_tag,
sc->arge_cdata.arge_rx_ring_map,
BUS_DMASYNC_PREWRITE);
return (0);
}
/*
* Free all the buffers in the RX ring.
*
* TODO: ensure that DMA is disabled and no pending DMA
* is lurking in the FIFO.
*/
static void
arge_rx_ring_free(struct arge_softc *sc)
{
int i;
struct arge_rxdesc *rxd;
ARGE_LOCK_ASSERT(sc);
for (i = 0; i < ARGE_RX_RING_COUNT; i++) {
rxd = &sc->arge_cdata.arge_rxdesc[i];
/* Unmap the mbuf */
if (rxd->rx_m != NULL) {
bus_dmamap_unload(sc->arge_cdata.arge_rx_tag,
rxd->rx_dmamap);
m_free(rxd->rx_m);
rxd->rx_m = NULL;
}
}
}
/*
* Initialize an RX descriptor and attach an MBUF cluster.
*/
static int
arge_newbuf(struct arge_softc *sc, int idx)
{
struct arge_desc *desc;
struct arge_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->arge_cdata.arge_rx_tag,
sc->arge_cdata.arge_rx_sparemap, m, segs, &nsegs, 0) != 0) {
m_freem(m);
return (ENOBUFS);
}
KASSERT(nsegs == 1, ("%s: %d segments returned!", __func__, nsegs));
rxd = &sc->arge_cdata.arge_rxdesc[idx];
if (rxd->rx_m != NULL) {
bus_dmamap_unload(sc->arge_cdata.arge_rx_tag, rxd->rx_dmamap);
}
map = rxd->rx_dmamap;
rxd->rx_dmamap = sc->arge_cdata.arge_rx_sparemap;
sc->arge_cdata.arge_rx_sparemap = map;
rxd->rx_m = m;
desc = rxd->desc;
if (segs[0].ds_addr & 3)
panic("RX packet address unaligned");
desc->packet_addr = segs[0].ds_addr;
desc->packet_ctrl = ARGE_DESC_EMPTY | ARGE_DMASIZE(segs[0].ds_len);
bus_dmamap_sync(sc->arge_cdata.arge_rx_ring_tag,
sc->arge_cdata.arge_rx_ring_map,
BUS_DMASYNC_PREWRITE);
return (0);
}
static __inline void
arge_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); i++) {
*dst++ = *src++;
}
if (m->m_len % sizeof(uint16_t))
*(uint8_t *)dst = *(uint8_t *)src;
m->m_data -= ETHER_ALIGN;
}
#ifdef DEVICE_POLLING
static int
arge_poll(struct ifnet *ifp, enum poll_cmd cmd, int count)
{
struct arge_softc *sc = ifp->if_softc;
int rx_npkts = 0;
if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
ARGE_LOCK(sc);
arge_tx_locked(sc);
rx_npkts = arge_rx_locked(sc);
ARGE_UNLOCK(sc);
}
return (rx_npkts);
}
#endif /* DEVICE_POLLING */
static void
arge_tx_locked(struct arge_softc *sc)
{
struct arge_txdesc *txd;
struct arge_desc *cur_tx;
struct ifnet *ifp;
uint32_t ctrl;
int cons, prod;
ARGE_LOCK_ASSERT(sc);
cons = sc->arge_cdata.arge_tx_cons;
prod = sc->arge_cdata.arge_tx_prod;
ARGEDEBUG(sc, ARGE_DBG_TX, "%s: cons=%d, prod=%d\n", __func__, cons,
prod);
if (cons == prod)
return;
bus_dmamap_sync(sc->arge_cdata.arge_tx_ring_tag,
sc->arge_cdata.arge_tx_ring_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
ifp = sc->arge_ifp;
/*
* Go through our tx list and free mbufs for those
* frames that have been transmitted.
*/
for (; cons != prod; ARGE_INC(cons, ARGE_TX_RING_COUNT)) {
cur_tx = &sc->arge_rdata.arge_tx_ring[cons];
ctrl = cur_tx->packet_ctrl;
/* Check if descriptor has "finished" flag */
if ((ctrl & ARGE_DESC_EMPTY) == 0)
break;
ARGE_WRITE(sc, AR71XX_DMA_TX_STATUS, DMA_TX_STATUS_PKT_SENT);
sc->arge_cdata.arge_tx_cnt--;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
txd = &sc->arge_cdata.arge_txdesc[cons];
ifp->if_opackets++;
bus_dmamap_sync(sc->arge_cdata.arge_tx_tag, txd->tx_dmamap,
BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->arge_cdata.arge_tx_tag, txd->tx_dmamap);
/* Free only if it's first descriptor in list */
if (txd->tx_m)
m_freem(txd->tx_m);
txd->tx_m = NULL;
/* reset descriptor */
cur_tx->packet_addr = 0;
}
sc->arge_cdata.arge_tx_cons = cons;
bus_dmamap_sync(sc->arge_cdata.arge_tx_ring_tag,
sc->arge_cdata.arge_tx_ring_map, BUS_DMASYNC_PREWRITE);
}
static int
arge_rx_locked(struct arge_softc *sc)
{
struct arge_rxdesc *rxd;
struct ifnet *ifp = sc->arge_ifp;
int cons, prog, packet_len, i;
struct arge_desc *cur_rx;
struct mbuf *m;
int rx_npkts = 0;
ARGE_LOCK_ASSERT(sc);
cons = sc->arge_cdata.arge_rx_cons;
bus_dmamap_sync(sc->arge_cdata.arge_rx_ring_tag,
sc->arge_cdata.arge_rx_ring_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
for (prog = 0; prog < ARGE_RX_RING_COUNT;
ARGE_INC(cons, ARGE_RX_RING_COUNT)) {
cur_rx = &sc->arge_rdata.arge_rx_ring[cons];
rxd = &sc->arge_cdata.arge_rxdesc[cons];
m = rxd->rx_m;
if ((cur_rx->packet_ctrl & ARGE_DESC_EMPTY) != 0)
break;
ARGE_WRITE(sc, AR71XX_DMA_RX_STATUS, DMA_RX_STATUS_PKT_RECVD);
prog++;
packet_len = ARGE_DMASIZE(cur_rx->packet_ctrl);
bus_dmamap_sync(sc->arge_cdata.arge_rx_tag, rxd->rx_dmamap,
BUS_DMASYNC_POSTREAD);
m = rxd->rx_m;
arge_fixup_rx(m);
m->m_pkthdr.rcvif = ifp;
/* Skip 4 bytes of CRC */
m->m_pkthdr.len = m->m_len = packet_len - ETHER_CRC_LEN;
ifp->if_ipackets++;
rx_npkts++;
ARGE_UNLOCK(sc);
(*ifp->if_input)(ifp, m);
ARGE_LOCK(sc);
cur_rx->packet_addr = 0;
}
if (prog > 0) {
i = sc->arge_cdata.arge_rx_cons;
for (; prog > 0 ; prog--) {
if (arge_newbuf(sc, i) != 0) {
device_printf(sc->arge_dev,
"Failed to allocate buffer\n");
break;
}
ARGE_INC(i, ARGE_RX_RING_COUNT);
}
bus_dmamap_sync(sc->arge_cdata.arge_rx_ring_tag,
sc->arge_cdata.arge_rx_ring_map,
BUS_DMASYNC_PREWRITE);
sc->arge_cdata.arge_rx_cons = cons;
}
return (rx_npkts);
}
static int
arge_intr_filter(void *arg)
{
struct arge_softc *sc = arg;
uint32_t status, ints;
status = ARGE_READ(sc, AR71XX_DMA_INTR_STATUS);
ints = ARGE_READ(sc, AR71XX_DMA_INTR);
ARGEDEBUG(sc, ARGE_DBG_INTR, "int mask(filter) = %b\n", ints,
"\20\10RX_BUS_ERROR\7RX_OVERFLOW\5RX_PKT_RCVD"
"\4TX_BUS_ERROR\2TX_UNDERRUN\1TX_PKT_SENT");
ARGEDEBUG(sc, ARGE_DBG_INTR, "status(filter) = %b\n", status,
"\20\10RX_BUS_ERROR\7RX_OVERFLOW\5RX_PKT_RCVD"
"\4TX_BUS_ERROR\2TX_UNDERRUN\1TX_PKT_SENT");
if (status & DMA_INTR_ALL) {
sc->arge_intr_status |= status;
ARGE_WRITE(sc, AR71XX_DMA_INTR, 0);
return (FILTER_SCHEDULE_THREAD);
}
sc->arge_intr_status = 0;
return (FILTER_STRAY);
}
static void
arge_intr(void *arg)
{
struct arge_softc *sc = arg;
uint32_t status;
struct ifnet *ifp = sc->arge_ifp;
status = ARGE_READ(sc, AR71XX_DMA_INTR_STATUS);
status |= sc->arge_intr_status;
ARGEDEBUG(sc, ARGE_DBG_INTR, "int status(intr) = %b\n", status,
"\20\10\7RX_OVERFLOW\5RX_PKT_RCVD"
"\4TX_BUS_ERROR\2TX_UNDERRUN\1TX_PKT_SENT");
/*
* Is it our interrupt at all?
*/
if (status == 0)
return;
if (status & DMA_INTR_RX_BUS_ERROR) {
ARGE_WRITE(sc, AR71XX_DMA_RX_STATUS, DMA_RX_STATUS_BUS_ERROR);
device_printf(sc->arge_dev, "RX bus error");
return;
}
if (status & DMA_INTR_TX_BUS_ERROR) {
ARGE_WRITE(sc, AR71XX_DMA_TX_STATUS, DMA_TX_STATUS_BUS_ERROR);
device_printf(sc->arge_dev, "TX bus error");
return;
}
ARGE_LOCK(sc);
if (status & DMA_INTR_RX_PKT_RCVD)
arge_rx_locked(sc);
/*
* RX overrun disables the receiver.
* Clear indication and re-enable rx.
*/
if ( status & DMA_INTR_RX_OVERFLOW) {
ARGE_WRITE(sc, AR71XX_DMA_RX_STATUS, DMA_RX_STATUS_OVERFLOW);
ARGE_WRITE(sc, AR71XX_DMA_RX_CONTROL, DMA_RX_CONTROL_EN);
sc->stats.rx_overflow++;
}
if (status & DMA_INTR_TX_PKT_SENT)
arge_tx_locked(sc);
/*
* Underrun turns off TX. Clear underrun indication.
* If there's anything left in the ring, reactivate the tx.
*/
if (status & DMA_INTR_TX_UNDERRUN) {
ARGE_WRITE(sc, AR71XX_DMA_TX_STATUS, DMA_TX_STATUS_UNDERRUN);
sc->stats.tx_underflow++;
ARGEDEBUG(sc, ARGE_DBG_TX, "%s: TX underrun; tx_cnt=%d\n",
__func__, sc->arge_cdata.arge_tx_cnt);
if (sc->arge_cdata.arge_tx_cnt > 0 ) {
ARGE_WRITE(sc, AR71XX_DMA_TX_CONTROL,
DMA_TX_CONTROL_EN);
}
}
/*
* If we've finished TXing and there's space for more packets
* to be queued for TX, do so. Otherwise we may end up in a
* situation where the interface send queue was filled
* whilst the hardware queue was full, then the hardware
* queue was drained by the interface send queue wasn't,
* and thus if_start() is never called to kick-start
* the send process (and all subsequent packets are simply
* discarded.
*
* XXX TODO: make sure that the hardware deals nicely
* with the possibility of the queue being enabled above
* after a TX underrun, then having the hardware queue added
* to below.
*/
if (status & (DMA_INTR_TX_PKT_SENT | DMA_INTR_TX_UNDERRUN) &&
(ifp->if_drv_flags & IFF_DRV_OACTIVE) == 0) {
if (!IFQ_IS_EMPTY(&ifp->if_snd))
arge_start_locked(ifp);
}
/*
* We handled all bits, clear status
*/
sc->arge_intr_status = 0;
ARGE_UNLOCK(sc);
/*
* re-enable all interrupts
*/
ARGE_WRITE(sc, AR71XX_DMA_INTR, DMA_INTR_ALL);
}
static void
arge_tick(void *xsc)
{
struct arge_softc *sc = xsc;
struct mii_data *mii;
ARGE_LOCK_ASSERT(sc);
if (sc->arge_miibus) {
mii = device_get_softc(sc->arge_miibus);
mii_tick(mii);
callout_reset(&sc->arge_stat_callout, hz, arge_tick, sc);
}
}
int
arge_multiphy_mediachange(struct ifnet *ifp)
{
struct arge_softc *sc = ifp->if_softc;
struct ifmedia *ifm = &sc->arge_ifmedia;
struct ifmedia_entry *ife = ifm->ifm_cur;
if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
return (EINVAL);
if (IFM_SUBTYPE(ife->ifm_media) == IFM_AUTO) {
device_printf(sc->arge_dev,
"AUTO is not supported for multiphy MAC");
return (EINVAL);
}
/*
* Ignore everything
*/
return (0);
}
void
arge_multiphy_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr)
{
struct arge_softc *sc = ifp->if_softc;
ifmr->ifm_status = IFM_AVALID | IFM_ACTIVE;
ifmr->ifm_active = IFM_ETHER | sc->arge_media_type |
sc->arge_duplex_mode;
}
Reference in New Issue View Git Blame Copy Permalink