1 // SPDX-License-Identifier: GPL-2.0-only 2 /**************************************************************************** 3 * Driver for Solarflare network controllers and boards 4 * 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 20 static 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 46 static 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 73 bool 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 89 int 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 } 105 106 void 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