freebsd-dev/sys/mips/cavium/if_octm.c
2014-09-19 09:19:49 +00:00

539 lines
12 KiB
C

/*-
* Copyright (c) 2010-2011 Juli Mallett <jmallett@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.
*
* $FreeBSD$
*/
/*
* Cavium Octeon management port Ethernet devices.
*/
#include "opt_inet.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/rman.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <net/bpf.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/if_var.h>
#include <net/if_vlan_var.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/if_ether.h>
#endif
#include <contrib/octeon-sdk/cvmx.h>
#include <mips/cavium/octeon_irq.h>
#include <contrib/octeon-sdk/cvmx-mgmt-port.h>
struct octm_softc {
struct ifnet *sc_ifp;
device_t sc_dev;
unsigned sc_port;
int sc_flags;
struct ifmedia sc_ifmedia;
struct resource *sc_intr;
void *sc_intr_cookie;
};
static void octm_identify(driver_t *, device_t);
static int octm_probe(device_t);
static int octm_attach(device_t);
static int octm_detach(device_t);
static int octm_shutdown(device_t);
static void octm_init(void *);
static int octm_transmit(struct ifnet *, struct mbuf *);
static int octm_medchange(struct ifnet *);
static void octm_medstat(struct ifnet *, struct ifmediareq *);
static int octm_ioctl(struct ifnet *, u_long, caddr_t);
static void octm_rx_intr(void *);
static device_method_t octm_methods[] = {
/* Device interface */
DEVMETHOD(device_identify, octm_identify),
DEVMETHOD(device_probe, octm_probe),
DEVMETHOD(device_attach, octm_attach),
DEVMETHOD(device_detach, octm_detach),
DEVMETHOD(device_shutdown, octm_shutdown),
{ 0, 0 }
};
static driver_t octm_driver = {
"octm",
octm_methods,
sizeof (struct octm_softc),
};
static devclass_t octm_devclass;
DRIVER_MODULE(octm, ciu, octm_driver, octm_devclass, 0, 0);
static void
octm_identify(driver_t *drv, device_t parent)
{
unsigned i;
if (!octeon_has_feature(OCTEON_FEATURE_MGMT_PORT))
return;
for (i = 0; i < CVMX_MGMT_PORT_NUM_PORTS; i++)
BUS_ADD_CHILD(parent, 0, "octm", i);
}
static int
octm_probe(device_t dev)
{
cvmx_mgmt_port_result_t result;
result = cvmx_mgmt_port_initialize(device_get_unit(dev));
switch (result) {
case CVMX_MGMT_PORT_SUCCESS:
break;
case CVMX_MGMT_PORT_NO_MEMORY:
return (ENOBUFS);
case CVMX_MGMT_PORT_INVALID_PARAM:
return (ENXIO);
case CVMX_MGMT_PORT_INIT_ERROR:
return (EIO);
}
device_set_desc(dev, "Cavium Octeon Management Ethernet");
return (0);
}
static int
octm_attach(device_t dev)
{
struct ifnet *ifp;
struct octm_softc *sc;
cvmx_mixx_irhwm_t mixx_irhwm;
cvmx_mixx_intena_t mixx_intena;
uint64_t mac;
int error;
int irq;
int rid;
sc = device_get_softc(dev);
sc->sc_dev = dev;
sc->sc_port = device_get_unit(dev);
switch (sc->sc_port) {
case 0:
irq = OCTEON_IRQ_MII;
break;
case 1:
irq = OCTEON_IRQ_MII1;
break;
default:
device_printf(dev, "unsupported management port %u.\n", sc->sc_port);
return (ENXIO);
}
/*
* Set MAC address for this management port.
*/
mac = 0;
memcpy((u_int8_t *)&mac + 2, cvmx_sysinfo_get()->mac_addr_base, 6);
mac += sc->sc_port;
cvmx_mgmt_port_set_mac(sc->sc_port, mac);
/* No watermark for input ring. */
mixx_irhwm.u64 = 0;
cvmx_write_csr(CVMX_MIXX_IRHWM(sc->sc_port), mixx_irhwm.u64);
/* Enable input ring interrupts. */
mixx_intena.u64 = 0;
mixx_intena.s.ithena = 1;
cvmx_write_csr(CVMX_MIXX_INTENA(sc->sc_port), mixx_intena.u64);
/* Allocate and establish interrupt. */
rid = 0;
sc->sc_intr = bus_alloc_resource(sc->sc_dev, SYS_RES_IRQ, &rid,
irq, irq, 1, RF_ACTIVE);
if (sc->sc_intr == NULL) {
device_printf(dev, "unable to allocate IRQ.\n");
return (ENXIO);
}
error = bus_setup_intr(sc->sc_dev, sc->sc_intr, INTR_TYPE_NET, NULL,
octm_rx_intr, sc, &sc->sc_intr_cookie);
if (error != 0) {
device_printf(dev, "unable to setup interrupt.\n");
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_intr);
return (ENXIO);
}
bus_describe_intr(sc->sc_dev, sc->sc_intr, sc->sc_intr_cookie, "rx");
/* XXX Possibly should enable TX interrupts. */
ifp = if_alloc(IFT_ETHER);
if (ifp == NULL) {
device_printf(dev, "cannot allocate ifnet.\n");
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_intr);
return (ENOMEM);
}
if_initname(ifp, device_get_name(dev), device_get_unit(dev));
ifp->if_mtu = ETHERMTU;
ifp->if_init = octm_init;
ifp->if_softc = sc;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST | IFF_ALLMULTI;
ifp->if_ioctl = octm_ioctl;
sc->sc_ifp = ifp;
sc->sc_flags = ifp->if_flags;
ifmedia_init(&sc->sc_ifmedia, 0, octm_medchange, octm_medstat);
ifmedia_add(&sc->sc_ifmedia, IFM_ETHER | IFM_AUTO, 0, NULL);
ifmedia_set(&sc->sc_ifmedia, IFM_ETHER | IFM_AUTO);
ether_ifattach(ifp, (const u_int8_t *)&mac + 2);
ifp->if_transmit = octm_transmit;
ifp->if_hdrlen = sizeof(struct ether_vlan_header);
ifp->if_capabilities = IFCAP_VLAN_MTU;
ifp->if_capenable = ifp->if_capabilities;
IFQ_SET_MAXLEN(&ifp->if_snd, CVMX_MGMT_PORT_NUM_TX_BUFFERS);
ifp->if_snd.ifq_drv_maxlen = CVMX_MGMT_PORT_NUM_TX_BUFFERS;
IFQ_SET_READY(&ifp->if_snd);
return (bus_generic_attach(dev));
}
static int
octm_detach(device_t dev)
{
struct octm_softc *sc;
cvmx_mgmt_port_result_t result;
sc = device_get_softc(dev);
result = cvmx_mgmt_port_initialize(sc->sc_port);
switch (result) {
case CVMX_MGMT_PORT_SUCCESS:
break;
case CVMX_MGMT_PORT_NO_MEMORY:
return (ENOBUFS);
case CVMX_MGMT_PORT_INVALID_PARAM:
return (ENXIO);
case CVMX_MGMT_PORT_INIT_ERROR:
return (EIO);
}
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_intr);
/* XXX Incomplete. */
return (0);
}
static int
octm_shutdown(device_t dev)
{
return (octm_detach(dev));
}
static void
octm_init(void *arg)
{
struct ifnet *ifp;
struct octm_softc *sc;
cvmx_mgmt_port_netdevice_flags_t flags;
uint64_t mac;
sc = arg;
ifp = sc->sc_ifp;
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) {
cvmx_mgmt_port_disable(sc->sc_port);
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
}
/*
* NB:
* MAC must be set before allmulti and promisc below, as
* cvmx_mgmt_port_set_mac will always enable the CAM, and turning on
* promiscuous mode only works with the CAM disabled.
*/
mac = 0;
memcpy((u_int8_t *)&mac + 2, IF_LLADDR(ifp), 6);
cvmx_mgmt_port_set_mac(sc->sc_port, mac);
/*
* This is done unconditionally, rather than only if sc_flags have
* changed because of set_mac's effect on the CAM noted above.
*/
flags = 0;
if ((ifp->if_flags & IFF_ALLMULTI) != 0)
flags |= CVMX_IFF_ALLMULTI;
if ((ifp->if_flags & IFF_PROMISC) != 0)
flags |= CVMX_IFF_PROMISC;
cvmx_mgmt_port_set_multicast_list(sc->sc_port, flags);
/* XXX link state? */
if ((ifp->if_flags & IFF_UP) != 0)
cvmx_mgmt_port_enable(sc->sc_port);
ifp->if_drv_flags |= IFF_DRV_RUNNING;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
}
static int
octm_transmit(struct ifnet *ifp, struct mbuf *m)
{
struct octm_softc *sc;
cvmx_mgmt_port_result_t result;
sc = ifp->if_softc;
if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
IFF_DRV_RUNNING) {
m_freem(m);
return (0);
}
result = cvmx_mgmt_port_sendm(sc->sc_port, m);
if (result == CVMX_MGMT_PORT_SUCCESS) {
ETHER_BPF_MTAP(ifp, m);
if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len);
} else
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
m_freem(m);
switch (result) {
case CVMX_MGMT_PORT_SUCCESS:
return (0);
case CVMX_MGMT_PORT_NO_MEMORY:
return (ENOBUFS);
case CVMX_MGMT_PORT_INVALID_PARAM:
return (ENXIO);
case CVMX_MGMT_PORT_INIT_ERROR:
return (EIO);
default:
return (EDOOFUS);
}
}
static int
octm_medchange(struct ifnet *ifp)
{
return (ENOTSUP);
}
static void
octm_medstat(struct ifnet *ifp, struct ifmediareq *ifm)
{
struct octm_softc *sc;
cvmx_helper_link_info_t link_info;
sc = ifp->if_softc;
ifm->ifm_status = IFM_AVALID;
ifm->ifm_active = IFT_ETHER;
link_info = cvmx_mgmt_port_link_get(sc->sc_port);
if (!link_info.s.link_up)
return;
ifm->ifm_status |= IFM_ACTIVE;
switch (link_info.s.speed) {
case 10:
ifm->ifm_active |= IFM_10_T;
break;
case 100:
ifm->ifm_active |= IFM_100_TX;
break;
case 1000:
ifm->ifm_active |= IFM_1000_T;
break;
case 10000:
ifm->ifm_active |= IFM_10G_T;
break;
}
if (link_info.s.full_duplex)
ifm->ifm_active |= IFM_FDX;
else
ifm->ifm_active |= IFM_HDX;
}
static int
octm_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct octm_softc *sc;
struct ifreq *ifr;
#ifdef INET
struct ifaddr *ifa;
#endif
int error;
sc = ifp->if_softc;
ifr = (struct ifreq *)data;
#ifdef INET
ifa = (struct ifaddr *)data;
#endif
switch (cmd) {
case SIOCSIFADDR:
#ifdef INET
/*
* Avoid reinitialization unless it's necessary.
*/
if (ifa->ifa_addr->sa_family == AF_INET) {
ifp->if_flags |= IFF_UP;
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
octm_init(sc);
arp_ifinit(ifp, ifa);
return (0);
}
#endif
error = ether_ioctl(ifp, cmd, data);
if (error != 0)
return (error);
return (0);
case SIOCSIFFLAGS:
if (ifp->if_flags == sc->sc_flags)
return (0);
if ((ifp->if_flags & IFF_UP) != 0) {
octm_init(sc);
} else {
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) {
cvmx_mgmt_port_disable(sc->sc_port);
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
}
}
sc->sc_flags = ifp->if_flags;
return (0);
case SIOCSIFCAP:
/*
* Just change the capabilities in software, currently none
* require reprogramming hardware, they just toggle whether we
* make use of already-present facilities in software.
*/
ifp->if_capenable = ifr->ifr_reqcap;
return (0);
case SIOCSIFMTU:
cvmx_mgmt_port_set_max_packet_size(sc->sc_port, ifr->ifr_mtu + ifp->if_hdrlen);
return (0);
case SIOCSIFMEDIA:
case SIOCGIFMEDIA:
error = ifmedia_ioctl(ifp, ifr, &sc->sc_ifmedia, cmd);
if (error != 0)
return (error);
return (0);
default:
error = ether_ioctl(ifp, cmd, data);
if (error != 0)
return (error);
return (0);
}
}
static void
octm_rx_intr(void *arg)
{
struct octm_softc *sc = arg;
cvmx_mixx_isr_t mixx_isr;
int len;
mixx_isr.u64 = cvmx_read_csr(CVMX_MIXX_ISR(sc->sc_port));
if (!mixx_isr.s.irthresh) {
device_printf(sc->sc_dev, "stray interrupt.\n");
return;
}
for (;;) {
struct mbuf *m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
if (m == NULL) {
device_printf(sc->sc_dev, "no memory for receive mbuf.\n");
return;
}
len = cvmx_mgmt_port_receive(sc->sc_port, MCLBYTES, m->m_data);
if (len > 0) {
m->m_pkthdr.rcvif = sc->sc_ifp;
m->m_pkthdr.len = m->m_len = len;
if_inc_counter(sc->sc_ifp, IFCOUNTER_IPACKETS, 1);
(*sc->sc_ifp->if_input)(sc->sc_ifp, m);
continue;
}
m_freem(m);
if (len == 0)
break;
if_inc_counter(sc->sc_ifp, IFCOUNTER_IERRORS, 1);
}
/* Acknowledge interrupts. */
cvmx_write_csr(CVMX_MIXX_ISR(sc->sc_port), mixx_isr.u64);
cvmx_read_csr(CVMX_MIXX_ISR(sc->sc_port));
}