7cb7fbdee6
Prevent saturattion of the bus by constant polling which in extreme cases can cause interface lockup. This makes FreeBSD match similar case in the executive.
137 lines
4.2 KiB
C
137 lines
4.2 KiB
C
/*************************************************************************
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Copyright (c) 2003-2007 Cavium Networks (support@cavium.com). All rights
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reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials provided
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with the distribution.
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* Neither the name of Cavium Networks nor the names of
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its contributors may be used to endorse or promote products
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derived from this software without specific prior written
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permission.
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This Software, including technical data, may be subject to U.S. export control laws, including the U.S. Export Administration Act and its associated regulations, and may be subject to export or import regulations in other countries.
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TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS OR WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
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*************************************************************************/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/endian.h>
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#include <sys/kernel.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include "wrapper-cvmx-includes.h"
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#include "ethernet-headers.h"
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struct mtx cvm_oct_mdio_mtx;
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MTX_SYSINIT(cvm_oct_mdio, &cvm_oct_mdio_mtx, "MDIO", MTX_DEF);
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/**
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* Perform an MII read. Called by the generic MII routines
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*
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* @param dev Device to perform read for
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* @param phy_id The MII phy id
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* @param location Register location to read
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* @return Result from the read or zero on failure
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*/
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int cvm_oct_mdio_read(struct ifnet *ifp, int phy_id, int location)
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{
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cvmx_smi_cmd_t smi_cmd;
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cvmx_smi_rd_dat_t smi_rd;
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MDIO_LOCK();
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smi_cmd.u64 = 0;
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smi_cmd.s.phy_op = 1;
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smi_cmd.s.phy_adr = phy_id;
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smi_cmd.s.reg_adr = location;
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cvmx_write_csr(CVMX_SMI_CMD, smi_cmd.u64);
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do {
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cvmx_wait(1000);
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smi_rd.u64 = cvmx_read_csr(CVMX_SMI_RD_DAT);
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} while (smi_rd.s.pending);
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MDIO_UNLOCK();
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if (smi_rd.s.val)
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return smi_rd.s.dat;
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else
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return 0;
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}
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/**
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* Perform an MII write. Called by the generic MII routines
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*
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* @param dev Device to perform write for
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* @param phy_id The MII phy id
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* @param location Register location to write
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* @param val Value to write
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*/
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void cvm_oct_mdio_write(struct ifnet *ifp, int phy_id, int location, int val)
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{
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cvmx_smi_cmd_t smi_cmd;
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cvmx_smi_wr_dat_t smi_wr;
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MDIO_LOCK();
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smi_wr.u64 = 0;
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smi_wr.s.dat = val;
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cvmx_write_csr(CVMX_SMI_WR_DAT, smi_wr.u64);
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smi_cmd.u64 = 0;
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smi_cmd.s.phy_op = 0;
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smi_cmd.s.phy_adr = phy_id;
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smi_cmd.s.reg_adr = location;
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cvmx_write_csr(CVMX_SMI_CMD, smi_cmd.u64);
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do {
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cvmx_wait(1000);
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smi_wr.u64 = cvmx_read_csr(CVMX_SMI_WR_DAT);
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} while (smi_wr.s.pending);
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MDIO_UNLOCK();
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}
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/**
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* Setup the MDIO device structures
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*
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* @param dev Device to setup
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*
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* @return Zero on success, negative on failure
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*/
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int cvm_oct_mdio_setup_device(struct ifnet *ifp)
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{
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cvm_oct_private_t *priv = (cvm_oct_private_t *)ifp->if_softc;
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priv->phy_id = cvmx_helper_board_get_mii_address(priv->port);
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priv->phy_device = NULL;
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priv->mdio_read = NULL;
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priv->mdio_write = NULL;
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return 0;
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}
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