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1// SPDX-License-Identifier: GPL-2.0-only2/****************************************************************************3 * Driver for Solarflare network controllers and boards4 * Copyright 2009-2013 Solarflare Communications Inc.5 */6 7/*8 * Driver for PHY related operations via MCDI.9 */10 11#include <linux/slab.h>12#include "efx.h"13#include "mcdi_port.h"14#include "mcdi.h"15#include "mcdi_pcol.h"16#include "nic.h"17#include "selftest.h"18#include "mcdi_port_common.h"19 20static int efx_mcdi_mdio_read(struct net_device *net_dev,21 int prtad, int devad, u16 addr)22{23 struct efx_nic *efx = netdev_priv(net_dev);24 MCDI_DECLARE_BUF(inbuf, MC_CMD_MDIO_READ_IN_LEN);25 MCDI_DECLARE_BUF(outbuf, MC_CMD_MDIO_READ_OUT_LEN);26 size_t outlen;27 int rc;28 29 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_BUS, efx->mdio_bus);30 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_PRTAD, prtad);31 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_DEVAD, devad);32 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_ADDR, addr);33 34 rc = efx_siena_mcdi_rpc(efx, MC_CMD_MDIO_READ, inbuf, sizeof(inbuf),35 outbuf, sizeof(outbuf), &outlen);36 if (rc)37 return rc;38 39 if (MCDI_DWORD(outbuf, MDIO_READ_OUT_STATUS) !=40 MC_CMD_MDIO_STATUS_GOOD)41 return -EIO;42 43 return (u16)MCDI_DWORD(outbuf, MDIO_READ_OUT_VALUE);44}45 46static int efx_mcdi_mdio_write(struct net_device *net_dev,47 int prtad, int devad, u16 addr, u16 value)48{49 struct efx_nic *efx = netdev_priv(net_dev);50 MCDI_DECLARE_BUF(inbuf, MC_CMD_MDIO_WRITE_IN_LEN);51 MCDI_DECLARE_BUF(outbuf, MC_CMD_MDIO_WRITE_OUT_LEN);52 size_t outlen;53 int rc;54 55 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_BUS, efx->mdio_bus);56 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_PRTAD, prtad);57 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_DEVAD, devad);58 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_ADDR, addr);59 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_VALUE, value);60 61 rc = efx_siena_mcdi_rpc(efx, MC_CMD_MDIO_WRITE, inbuf, sizeof(inbuf),62 outbuf, sizeof(outbuf), &outlen);63 if (rc)64 return rc;65 66 if (MCDI_DWORD(outbuf, MDIO_WRITE_OUT_STATUS) !=67 MC_CMD_MDIO_STATUS_GOOD)68 return -EIO;69 70 return 0;71}72 73bool efx_siena_mcdi_mac_check_fault(struct efx_nic *efx)74{75 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);76 size_t outlength;77 int rc;78 79 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);80 81 rc = efx_siena_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,82 outbuf, sizeof(outbuf), &outlength);83 if (rc)84 return true;85 86 return MCDI_DWORD(outbuf, GET_LINK_OUT_MAC_FAULT) != 0;87}88 89int efx_siena_mcdi_port_probe(struct efx_nic *efx)90{91 int rc;92 93 /* Set up MDIO structure for PHY */94 efx->mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;95 efx->mdio.mdio_read = efx_mcdi_mdio_read;96 efx->mdio.mdio_write = efx_mcdi_mdio_write;97 98 /* Fill out MDIO structure, loopback modes, and initial link state */99 rc = efx_siena_mcdi_phy_probe(efx);100 if (rc != 0)101 return rc;102 103 return efx_siena_mcdi_mac_init_stats(efx);104}105 106void efx_siena_mcdi_port_remove(struct efx_nic *efx)107{108 efx_siena_mcdi_phy_remove(efx);109 efx_siena_mcdi_mac_fini_stats(efx);110}111