cavium/octe/ethernet-common.c

/*************************************************************************
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reserved.


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*************************************************************************/

#include <sys/cdefs.h>
__FBSDID("$FreeBSD: head/sys/mips/cavium/octe/ethernet-common.c 232289 2012-02-29 05:48:29Z gonzo $");

#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/socket.h>

#include <net/ethernet.h>
#include <net/if.h>

#include "wrapper-cvmx-includes.h"
#include "ethernet-headers.h"

extern int octeon_is_simulation(void);

static uint64_t cvm_oct_mac_addr = 0;
static uint32_t cvm_oct_mac_addr_offset = 0;

/**
 * Set the multicast list. Currently unimplemented.
 *
 * @param dev    Device to work on
 */
void cvm_oct_common_set_multicast_list(struct ifnet *ifp)
{
	cvmx_gmxx_prtx_cfg_t gmx_cfg;
	cvm_oct_private_t *priv = (cvm_oct_private_t *)ifp->if_softc;
	int interface = INTERFACE(priv->port);
	int index = INDEX(priv->port);

	if ((interface < 2) && (cvmx_helper_interface_get_mode(interface) != CVMX_HELPER_INTERFACE_MODE_SPI)) {
		cvmx_gmxx_rxx_adr_ctl_t control;
		control.u64 = 0;
		control.s.bcst = 1;     /* Allow broadcast MAC addresses */

		if (/*ifp->mc_list || */(ifp->if_flags&IFF_ALLMULTI) ||
		    (ifp->if_flags & IFF_PROMISC))
			control.s.mcst = 2; /* Force accept multicast packets */
		else
			control.s.mcst = 1; /* Force reject multicat packets */

		if (ifp->if_flags & IFF_PROMISC)
			control.s.cam_mode = 0; /* Reject matches if promisc. Since CAM is shut off, should accept everything */
		else
			control.s.cam_mode = 1; /* Filter packets based on the CAM */

		gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
		cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64 & ~1ull);

		cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface), control.u64);
		if (ifp->if_flags&IFF_PROMISC)
			cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN(index, interface), 0);
		else
			cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN(index, interface), 1);

		cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
	}
}


/**
 * Assign a MAC addres from the pool of available MAC addresses
 * Can return as either a 64-bit value and/or 6 octets.
 *
 * @param macp    Filled in with the assigned address if non-NULL
 * @param octets  Filled in with the assigned address if non-NULL
 * @return Zero on success
 */
int cvm_assign_mac_address(uint64_t *macp, uint8_t *octets)
{
	/* Initialize from global MAC address base; fail if not set */
	if (cvm_oct_mac_addr == 0) {
		memcpy((uint8_t *)&cvm_oct_mac_addr + 2,
		    cvmx_sysinfo_get()->mac_addr_base, 6);

		if (cvm_oct_mac_addr == 0)
			return ENXIO;

		/*
		 * The offset from mac_addr_base that should be used for the next port
		 * that is configured.  By convention, if any mgmt ports exist on the
		 * chip, they get the first mac addresses.  The ports controlled by
		 * driver that use this function are numbered sequencially following
		 * any mgmt addresses that may exist.
		 *
		 * XXX Would be nice if __cvmx_mgmt_port_num_ports() were
		 *     not static to cvmx-mgmt-port.c.
		 */
		if (OCTEON_IS_MODEL(OCTEON_CN56XX))
			cvm_oct_mac_addr_offset = 1;
		else if (OCTEON_IS_MODEL(OCTEON_CN52XX) || OCTEON_IS_MODEL(OCTEON_CN63XX))
			cvm_oct_mac_addr_offset = 2;
		else
			cvm_oct_mac_addr_offset = 0;
		cvm_oct_mac_addr += cvm_oct_mac_addr_offset;
	}

	if (cvm_oct_mac_addr_offset >= cvmx_sysinfo_get()->mac_addr_count)
		return ENXIO;	    /* Out of addresses to assign */

	if (macp)
		*macp = cvm_oct_mac_addr;
	if (octets)
		memcpy(octets, (u_int8_t *)&cvm_oct_mac_addr + 2, 6);

	cvm_oct_mac_addr++;
	cvm_oct_mac_addr_offset++;

	return 0;
}

/**
 * Set the hardware MAC address for a device
 *
 * @param dev    Device to change the MAC address for
 * @param addr   Address structure to change it too.
 */
void cvm_oct_common_set_mac_address(struct ifnet *ifp, const void *addr)
{
	cvm_oct_private_t *priv = (cvm_oct_private_t *)ifp->if_softc;
	cvmx_gmxx_prtx_cfg_t gmx_cfg;
	int interface = INTERFACE(priv->port);
	int index = INDEX(priv->port);

	memcpy(priv->mac, addr, 6);

	if ((interface < 2) && (cvmx_helper_interface_get_mode(interface) != CVMX_HELPER_INTERFACE_MODE_SPI)) {
		int i;
		const uint8_t *ptr = addr;
		uint64_t mac = 0;
		for (i = 0; i < 6; i++)
			mac = (mac<<8) | (uint64_t)(ptr[i]);

		gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
		cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64 & ~1ull);

		cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
		cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface), ptr[0]);
		cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface), ptr[1]);
		cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface), ptr[2]);
		cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface), ptr[3]);
		cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface), ptr[4]);
		cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface), ptr[5]);
		cvm_oct_common_set_multicast_list(ifp);
		cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
	}
}


/**
 * Change the link MTU. Unimplemented
 *
 * @param dev     Device to change
 * @param new_mtu The new MTU
 * @return Zero on success
 */
int cvm_oct_common_change_mtu(struct ifnet *ifp, int new_mtu)
{
	cvm_oct_private_t *priv = (cvm_oct_private_t *)ifp->if_softc;
	int interface = INTERFACE(priv->port);
	int index = INDEX(priv->port);
	int vlan_bytes = 4;

	/* Limit the MTU to make sure the ethernet packets are between 64 bytes
	   and 65535 bytes */
	if ((new_mtu + 14 + 4 + vlan_bytes < 64) || (new_mtu + 14 + 4 + vlan_bytes > 65392)) {
		printf("MTU must be between %d and %d.\n", 64-14-4-vlan_bytes, 65392-14-4-vlan_bytes);
		return -EINVAL;
	}
	ifp->if_mtu = new_mtu;

	if ((interface < 2) && (cvmx_helper_interface_get_mode(interface) != CVMX_HELPER_INTERFACE_MODE_SPI)) {
		int max_packet = new_mtu + 14 + 4 + vlan_bytes; /* Add ethernet header and FCS, and VLAN if configured. */

		if (OCTEON_IS_MODEL(OCTEON_CN3XXX) || OCTEON_IS_MODEL(OCTEON_CN58XX)) {
			/* Signal errors on packets larger than the MTU */
			cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface), max_packet);
		} else {
			/* Set the hardware to truncate packets larger than the MTU and
				smaller the 64 bytes */
			cvmx_pip_frm_len_chkx_t frm_len_chk;
			frm_len_chk.u64 = 0;
			frm_len_chk.s.minlen = 64;
			frm_len_chk.s.maxlen = max_packet;
			cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface), frm_len_chk.u64);
		}
		/* Set the hardware to truncate packets larger than the MTU. The
		   jabber register must be set to a multiple of 8 bytes, so round up */
		cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface), (max_packet + 7) & ~7u);
	}
	return 0;
}


/**
 * Enable port.
 */
int cvm_oct_common_open(struct ifnet *ifp)
{
	cvmx_gmxx_prtx_cfg_t gmx_cfg;
	cvm_oct_private_t *priv = (cvm_oct_private_t *)ifp->if_softc;
	int interface = INTERFACE(priv->port);
	int index = INDEX(priv->port);
	cvmx_helper_link_info_t link_info;

	gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
	gmx_cfg.s.en = 1;
	cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);

	/*
	 * Set the link state unless we are using MII.
	 */
        if (!octeon_is_simulation() && priv->miibus == NULL) {
             link_info = cvmx_helper_link_get(priv->port);
             if (!link_info.s.link_up)
		if_link_state_change(ifp, LINK_STATE_DOWN);
	     else
		if_link_state_change(ifp, LINK_STATE_UP);
        }

	return 0;
}


/**
 * Disable port.
 */
int cvm_oct_common_stop(struct ifnet *ifp)
{
	cvmx_gmxx_prtx_cfg_t gmx_cfg;
	cvm_oct_private_t *priv = (cvm_oct_private_t *)ifp->if_softc;
	int interface = INTERFACE(priv->port);
	int index = INDEX(priv->port);

	gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
	gmx_cfg.s.en = 0;
	cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
	return 0;
}

/**
 * Poll for link status change.
 */
void cvm_oct_common_poll(struct ifnet *ifp)
{
	cvm_oct_private_t *priv = (cvm_oct_private_t *)ifp->if_softc;
	cvmx_helper_link_info_t link_info;

	/*
	 * If this is a simulation, do nothing.
	 */
	if (octeon_is_simulation())
		return;

	/*
	 * If there is a device-specific poll method, use it.
	 */
	if (priv->poll != NULL) {
		priv->poll(ifp);
		return;
	}

	/*
	 * If an MII bus is attached, don't use the Simple Executive's link
	 * state routines.
	 */
	if (priv->miibus != NULL)
		return;

	/*
	 * Use the Simple Executive's link state routines.
	 */
	link_info = cvmx_helper_link_get(priv->port);
	if (link_info.u64 == priv->link_info)
		return;

	link_info = cvmx_helper_link_autoconf(priv->port);
	priv->link_info = link_info.u64;
	priv->need_link_update = 1;
}


/**
 * Per network device initialization
 *
 * @param dev    Device to initialize
 * @return Zero on success
 */
int cvm_oct_common_init(struct ifnet *ifp)
{
	uint8_t mac[6];
	cvm_oct_private_t *priv = (cvm_oct_private_t *)ifp->if_softc;

	if (cvm_assign_mac_address(NULL, mac) != 0)
		return ENXIO;

	ifp->if_mtu = ETHERMTU;

	cvm_oct_mdio_setup_device(ifp);

	cvm_oct_common_set_mac_address(ifp, mac);
	cvm_oct_common_change_mtu(ifp, ifp->if_mtu);

	/*
	 * Do any last-minute board-specific initialization.
	 */
	switch (cvmx_sysinfo_get()->board_type) {
#if defined(OCTEON_VENDOR_LANNER)
	case CVMX_BOARD_TYPE_CUST_LANNER_MR320:
	case CVMX_BOARD_TYPE_CUST_LANNER_MR321X:
		if (priv->phy_id == 16)
			cvm_oct_mv88e61xx_setup_device(ifp);
		break;
#endif
	default:
		break;
	}

	device_attach(priv->dev);

	return 0;
}

void cvm_oct_common_uninit(struct ifnet *ifp)
{
    /* Currently nothing to do */
}