--- /dev/null
+/****************************************************************************
+ * Driver for Solarflare network controllers and boards
+ * Copyright 2009-2013 Solarflare Communications Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation, incorporated herein by reference.
+ */
+
+/*
+ * Driver for PHY related operations via MCDI.
+ */
+
+#include <linux/slab.h>
+#include "efx.h"
+#include "phy.h"
+#include "mcdi.h"
+#include "mcdi_pcol.h"
+#include "nic.h"
+#include "selftest.h"
+
+struct efx_mcdi_phy_data {
+ u32 flags;
+ u32 type;
+ u32 supported_cap;
+ u32 channel;
+ u32 port;
+ u32 stats_mask;
+ u8 name[20];
+ u32 media;
+ u32 mmd_mask;
+ u8 revision[20];
+ u32 forced_cap;
+};
+
+static int
+efx_mcdi_get_phy_cfg(struct efx_nic *efx, struct efx_mcdi_phy_data *cfg)
+{
+ MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_CFG_OUT_LEN);
+ size_t outlen;
+ int rc;
+
+ BUILD_BUG_ON(MC_CMD_GET_PHY_CFG_IN_LEN != 0);
+ BUILD_BUG_ON(MC_CMD_GET_PHY_CFG_OUT_NAME_LEN != sizeof(cfg->name));
+
+ rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_CFG, NULL, 0,
+ outbuf, sizeof(outbuf), &outlen);
+ if (rc)
+ goto fail;
+
+ if (outlen < MC_CMD_GET_PHY_CFG_OUT_LEN) {
+ rc = -EIO;
+ goto fail;
+ }
+
+ cfg->flags = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_FLAGS);
+ cfg->type = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_TYPE);
+ cfg->supported_cap =
+ MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_SUPPORTED_CAP);
+ cfg->channel = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_CHANNEL);
+ cfg->port = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_PRT);
+ cfg->stats_mask = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_STATS_MASK);
+ memcpy(cfg->name, MCDI_PTR(outbuf, GET_PHY_CFG_OUT_NAME),
+ sizeof(cfg->name));
+ cfg->media = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_MEDIA_TYPE);
+ cfg->mmd_mask = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_MMD_MASK);
+ memcpy(cfg->revision, MCDI_PTR(outbuf, GET_PHY_CFG_OUT_REVISION),
+ sizeof(cfg->revision));
+
+ return 0;
+
+fail:
+ netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
+ return rc;
+}
+
+static int efx_mcdi_set_link(struct efx_nic *efx, u32 capabilities,
+ u32 flags, u32 loopback_mode,
+ u32 loopback_speed)
+{
+ MCDI_DECLARE_BUF(inbuf, MC_CMD_SET_LINK_IN_LEN);
+ int rc;
+
+ BUILD_BUG_ON(MC_CMD_SET_LINK_OUT_LEN != 0);
+
+ MCDI_SET_DWORD(inbuf, SET_LINK_IN_CAP, capabilities);
+ MCDI_SET_DWORD(inbuf, SET_LINK_IN_FLAGS, flags);
+ MCDI_SET_DWORD(inbuf, SET_LINK_IN_LOOPBACK_MODE, loopback_mode);
+ MCDI_SET_DWORD(inbuf, SET_LINK_IN_LOOPBACK_SPEED, loopback_speed);
+
+ rc = efx_mcdi_rpc(efx, MC_CMD_SET_LINK, inbuf, sizeof(inbuf),
+ NULL, 0, NULL);
+ return rc;
+}
+
+static int efx_mcdi_loopback_modes(struct efx_nic *efx, u64 *loopback_modes)
+{
+ MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LOOPBACK_MODES_OUT_LEN);
+ size_t outlen;
+ int rc;
+
+ rc = efx_mcdi_rpc(efx, MC_CMD_GET_LOOPBACK_MODES, NULL, 0,
+ outbuf, sizeof(outbuf), &outlen);
+ if (rc)
+ goto fail;
+
+ if (outlen < (MC_CMD_GET_LOOPBACK_MODES_OUT_SUGGESTED_OFST +
+ MC_CMD_GET_LOOPBACK_MODES_OUT_SUGGESTED_LEN)) {
+ rc = -EIO;
+ goto fail;
+ }
+
+ *loopback_modes = MCDI_QWORD(outbuf, GET_LOOPBACK_MODES_OUT_SUGGESTED);
+
+ return 0;
+
+fail:
+ netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
+ return rc;
+}
+
+static int efx_mcdi_mdio_read(struct net_device *net_dev,
+ int prtad, int devad, u16 addr)
+{
+ struct efx_nic *efx = netdev_priv(net_dev);
+ MCDI_DECLARE_BUF(inbuf, MC_CMD_MDIO_READ_IN_LEN);
+ MCDI_DECLARE_BUF(outbuf, MC_CMD_MDIO_READ_OUT_LEN);
+ size_t outlen;
+ int rc;
+
+ MCDI_SET_DWORD(inbuf, MDIO_READ_IN_BUS, efx->mdio_bus);
+ MCDI_SET_DWORD(inbuf, MDIO_READ_IN_PRTAD, prtad);
+ MCDI_SET_DWORD(inbuf, MDIO_READ_IN_DEVAD, devad);
+ MCDI_SET_DWORD(inbuf, MDIO_READ_IN_ADDR, addr);
+
+ rc = efx_mcdi_rpc(efx, MC_CMD_MDIO_READ, inbuf, sizeof(inbuf),
+ outbuf, sizeof(outbuf), &outlen);
+ if (rc)
+ return rc;
+
+ if (MCDI_DWORD(outbuf, MDIO_READ_OUT_STATUS) !=
+ MC_CMD_MDIO_STATUS_GOOD)
+ return -EIO;
+
+ return (u16)MCDI_DWORD(outbuf, MDIO_READ_OUT_VALUE);
+}
+
+static int efx_mcdi_mdio_write(struct net_device *net_dev,
+ int prtad, int devad, u16 addr, u16 value)
+{
+ struct efx_nic *efx = netdev_priv(net_dev);
+ MCDI_DECLARE_BUF(inbuf, MC_CMD_MDIO_WRITE_IN_LEN);
+ MCDI_DECLARE_BUF(outbuf, MC_CMD_MDIO_WRITE_OUT_LEN);
+ size_t outlen;
+ int rc;
+
+ MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_BUS, efx->mdio_bus);
+ MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_PRTAD, prtad);
+ MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_DEVAD, devad);
+ MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_ADDR, addr);
+ MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_VALUE, value);
+
+ rc = efx_mcdi_rpc(efx, MC_CMD_MDIO_WRITE, inbuf, sizeof(inbuf),
+ outbuf, sizeof(outbuf), &outlen);
+ if (rc)
+ return rc;
+
+ if (MCDI_DWORD(outbuf, MDIO_WRITE_OUT_STATUS) !=
+ MC_CMD_MDIO_STATUS_GOOD)
+ return -EIO;
+
+ return 0;
+}
+
+static u32 mcdi_to_ethtool_cap(u32 media, u32 cap)
+{
+ u32 result = 0;
+
+ switch (media) {
+ case MC_CMD_MEDIA_KX4:
+ result |= SUPPORTED_Backplane;
+ if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
+ result |= SUPPORTED_1000baseKX_Full;
+ if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
+ result |= SUPPORTED_10000baseKX4_Full;
+ if (cap & (1 << MC_CMD_PHY_CAP_40000FDX_LBN))
+ result |= SUPPORTED_40000baseKR4_Full;
+ break;
+
+ case MC_CMD_MEDIA_XFP:
+ case MC_CMD_MEDIA_SFP_PLUS:
+ result |= SUPPORTED_FIBRE;
+ break;
+
+ case MC_CMD_MEDIA_QSFP_PLUS:
+ result |= SUPPORTED_FIBRE;
+ if (cap & (1 << MC_CMD_PHY_CAP_40000FDX_LBN))
+ result |= SUPPORTED_40000baseCR4_Full;
+ break;
+
+ case MC_CMD_MEDIA_BASE_T:
+ result |= SUPPORTED_TP;
+ if (cap & (1 << MC_CMD_PHY_CAP_10HDX_LBN))
+ result |= SUPPORTED_10baseT_Half;
+ if (cap & (1 << MC_CMD_PHY_CAP_10FDX_LBN))
+ result |= SUPPORTED_10baseT_Full;
+ if (cap & (1 << MC_CMD_PHY_CAP_100HDX_LBN))
+ result |= SUPPORTED_100baseT_Half;
+ if (cap & (1 << MC_CMD_PHY_CAP_100FDX_LBN))
+ result |= SUPPORTED_100baseT_Full;
+ if (cap & (1 << MC_CMD_PHY_CAP_1000HDX_LBN))
+ result |= SUPPORTED_1000baseT_Half;
+ if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
+ result |= SUPPORTED_1000baseT_Full;
+ if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
+ result |= SUPPORTED_10000baseT_Full;
+ break;
+ }
+
+ if (cap & (1 << MC_CMD_PHY_CAP_PAUSE_LBN))
+ result |= SUPPORTED_Pause;
+ if (cap & (1 << MC_CMD_PHY_CAP_ASYM_LBN))
+ result |= SUPPORTED_Asym_Pause;
+ if (cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
+ result |= SUPPORTED_Autoneg;
+
+ return result;
+}
+
+static u32 ethtool_to_mcdi_cap(u32 cap)
+{
+ u32 result = 0;
+
+ if (cap & SUPPORTED_10baseT_Half)
+ result |= (1 << MC_CMD_PHY_CAP_10HDX_LBN);
+ if (cap & SUPPORTED_10baseT_Full)
+ result |= (1 << MC_CMD_PHY_CAP_10FDX_LBN);
+ if (cap & SUPPORTED_100baseT_Half)
+ result |= (1 << MC_CMD_PHY_CAP_100HDX_LBN);
+ if (cap & SUPPORTED_100baseT_Full)
+ result |= (1 << MC_CMD_PHY_CAP_100FDX_LBN);
+ if (cap & SUPPORTED_1000baseT_Half)
+ result |= (1 << MC_CMD_PHY_CAP_1000HDX_LBN);
+ if (cap & (SUPPORTED_1000baseT_Full | SUPPORTED_1000baseKX_Full))
+ result |= (1 << MC_CMD_PHY_CAP_1000FDX_LBN);
+ if (cap & (SUPPORTED_10000baseT_Full | SUPPORTED_10000baseKX4_Full))
+ result |= (1 << MC_CMD_PHY_CAP_10000FDX_LBN);
+ if (cap & (SUPPORTED_40000baseCR4_Full | SUPPORTED_40000baseKR4_Full))
+ result |= (1 << MC_CMD_PHY_CAP_40000FDX_LBN);
+ if (cap & SUPPORTED_Pause)
+ result |= (1 << MC_CMD_PHY_CAP_PAUSE_LBN);
+ if (cap & SUPPORTED_Asym_Pause)
+ result |= (1 << MC_CMD_PHY_CAP_ASYM_LBN);
+ if (cap & SUPPORTED_Autoneg)
+ result |= (1 << MC_CMD_PHY_CAP_AN_LBN);
+
+ return result;
+}
+
+static u32 efx_get_mcdi_phy_flags(struct efx_nic *efx)
+{
+ struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
+ enum efx_phy_mode mode, supported;
+ u32 flags;
+
+ /* TODO: Advertise the capabilities supported by this PHY */
+ supported = 0;
+ if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_TXDIS_LBN))
+ supported |= PHY_MODE_TX_DISABLED;
+ if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_LOWPOWER_LBN))
+ supported |= PHY_MODE_LOW_POWER;
+ if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_POWEROFF_LBN))
+ supported |= PHY_MODE_OFF;
+
+ mode = efx->phy_mode & supported;
+
+ flags = 0;
+ if (mode & PHY_MODE_TX_DISABLED)
+ flags |= (1 << MC_CMD_SET_LINK_IN_TXDIS_LBN);
+ if (mode & PHY_MODE_LOW_POWER)
+ flags |= (1 << MC_CMD_SET_LINK_IN_LOWPOWER_LBN);
+ if (mode & PHY_MODE_OFF)
+ flags |= (1 << MC_CMD_SET_LINK_IN_POWEROFF_LBN);
+
+ return flags;
+}
+
+static u32 mcdi_to_ethtool_media(u32 media)
+{
+ switch (media) {
+ case MC_CMD_MEDIA_XAUI:
+ case MC_CMD_MEDIA_CX4:
+ case MC_CMD_MEDIA_KX4:
+ return PORT_OTHER;
+
+ case MC_CMD_MEDIA_XFP:
+ case MC_CMD_MEDIA_SFP_PLUS:
+ case MC_CMD_MEDIA_QSFP_PLUS:
+ return PORT_FIBRE;
+
+ case MC_CMD_MEDIA_BASE_T:
+ return PORT_TP;
+
+ default:
+ return PORT_OTHER;
+ }
+}
+
+static void efx_mcdi_phy_decode_link(struct efx_nic *efx,
+ struct efx_link_state *link_state,
+ u32 speed, u32 flags, u32 fcntl)
+{
+ switch (fcntl) {
+ case MC_CMD_FCNTL_AUTO:
+ WARN_ON(1); /* This is not a link mode */
+ link_state->fc = EFX_FC_AUTO | EFX_FC_TX | EFX_FC_RX;
+ break;
+ case MC_CMD_FCNTL_BIDIR:
+ link_state->fc = EFX_FC_TX | EFX_FC_RX;
+ break;
+ case MC_CMD_FCNTL_RESPOND:
+ link_state->fc = EFX_FC_RX;
+ break;
+ default:
+ WARN_ON(1);
+ case MC_CMD_FCNTL_OFF:
+ link_state->fc = 0;
+ break;
+ }
+
+ link_state->up = !!(flags & (1 << MC_CMD_GET_LINK_OUT_LINK_UP_LBN));
+ link_state->fd = !!(flags & (1 << MC_CMD_GET_LINK_OUT_FULL_DUPLEX_LBN));
+ link_state->speed = speed;
+}
+
+static int efx_mcdi_phy_probe(struct efx_nic *efx)
+{
+ struct efx_mcdi_phy_data *phy_data;
+ MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
+ u32 caps;
+ int rc;
+
+ /* Initialise and populate phy_data */
+ phy_data = kzalloc(sizeof(*phy_data), GFP_KERNEL);
+ if (phy_data == NULL)
+ return -ENOMEM;
+
+ rc = efx_mcdi_get_phy_cfg(efx, phy_data);
+ if (rc != 0)
+ goto fail;
+
+ /* Read initial link advertisement */
+ BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
+ rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
+ outbuf, sizeof(outbuf), NULL);
+ if (rc)
+ goto fail;
+
+ /* Fill out nic state */
+ efx->phy_data = phy_data;
+ efx->phy_type = phy_data->type;
+
+ efx->mdio_bus = phy_data->channel;
+ efx->mdio.prtad = phy_data->port;
+ efx->mdio.mmds = phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22);
+ efx->mdio.mode_support = 0;
+ if (phy_data->mmd_mask & (1 << MC_CMD_MMD_CLAUSE22))
+ efx->mdio.mode_support |= MDIO_SUPPORTS_C22;
+ if (phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22))
+ efx->mdio.mode_support |= MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
+
+ caps = MCDI_DWORD(outbuf, GET_LINK_OUT_CAP);
+ if (caps & (1 << MC_CMD_PHY_CAP_AN_LBN))
+ efx->link_advertising =
+ mcdi_to_ethtool_cap(phy_data->media, caps);
+ else
+ phy_data->forced_cap = caps;
+
+ /* Assert that we can map efx -> mcdi loopback modes */
+ BUILD_BUG_ON(LOOPBACK_NONE != MC_CMD_LOOPBACK_NONE);
+ BUILD_BUG_ON(LOOPBACK_DATA != MC_CMD_LOOPBACK_DATA);
+ BUILD_BUG_ON(LOOPBACK_GMAC != MC_CMD_LOOPBACK_GMAC);
+ BUILD_BUG_ON(LOOPBACK_XGMII != MC_CMD_LOOPBACK_XGMII);
+ BUILD_BUG_ON(LOOPBACK_XGXS != MC_CMD_LOOPBACK_XGXS);
+ BUILD_BUG_ON(LOOPBACK_XAUI != MC_CMD_LOOPBACK_XAUI);
+ BUILD_BUG_ON(LOOPBACK_GMII != MC_CMD_LOOPBACK_GMII);
+ BUILD_BUG_ON(LOOPBACK_SGMII != MC_CMD_LOOPBACK_SGMII);
+ BUILD_BUG_ON(LOOPBACK_XGBR != MC_CMD_LOOPBACK_XGBR);
+ BUILD_BUG_ON(LOOPBACK_XFI != MC_CMD_LOOPBACK_XFI);
+ BUILD_BUG_ON(LOOPBACK_XAUI_FAR != MC_CMD_LOOPBACK_XAUI_FAR);
+ BUILD_BUG_ON(LOOPBACK_GMII_FAR != MC_CMD_LOOPBACK_GMII_FAR);
+ BUILD_BUG_ON(LOOPBACK_SGMII_FAR != MC_CMD_LOOPBACK_SGMII_FAR);
+ BUILD_BUG_ON(LOOPBACK_XFI_FAR != MC_CMD_LOOPBACK_XFI_FAR);
+ BUILD_BUG_ON(LOOPBACK_GPHY != MC_CMD_LOOPBACK_GPHY);
+ BUILD_BUG_ON(LOOPBACK_PHYXS != MC_CMD_LOOPBACK_PHYXS);
+ BUILD_BUG_ON(LOOPBACK_PCS != MC_CMD_LOOPBACK_PCS);
+ BUILD_BUG_ON(LOOPBACK_PMAPMD != MC_CMD_LOOPBACK_PMAPMD);
+ BUILD_BUG_ON(LOOPBACK_XPORT != MC_CMD_LOOPBACK_XPORT);
+ BUILD_BUG_ON(LOOPBACK_XGMII_WS != MC_CMD_LOOPBACK_XGMII_WS);
+ BUILD_BUG_ON(LOOPBACK_XAUI_WS != MC_CMD_LOOPBACK_XAUI_WS);
+ BUILD_BUG_ON(LOOPBACK_XAUI_WS_FAR != MC_CMD_LOOPBACK_XAUI_WS_FAR);
+ BUILD_BUG_ON(LOOPBACK_XAUI_WS_NEAR != MC_CMD_LOOPBACK_XAUI_WS_NEAR);
+ BUILD_BUG_ON(LOOPBACK_GMII_WS != MC_CMD_LOOPBACK_GMII_WS);
+ BUILD_BUG_ON(LOOPBACK_XFI_WS != MC_CMD_LOOPBACK_XFI_WS);
+ BUILD_BUG_ON(LOOPBACK_XFI_WS_FAR != MC_CMD_LOOPBACK_XFI_WS_FAR);
+ BUILD_BUG_ON(LOOPBACK_PHYXS_WS != MC_CMD_LOOPBACK_PHYXS_WS);
+
+ rc = efx_mcdi_loopback_modes(efx, &efx->loopback_modes);
+ if (rc != 0)
+ goto fail;
+ /* The MC indicates that LOOPBACK_NONE is a valid loopback mode,
+ * but by convention we don't */
+ efx->loopback_modes &= ~(1 << LOOPBACK_NONE);
+
+ /* Set the initial link mode */
+ efx_mcdi_phy_decode_link(
+ efx, &efx->link_state,
+ MCDI_DWORD(outbuf, GET_LINK_OUT_LINK_SPEED),
+ MCDI_DWORD(outbuf, GET_LINK_OUT_FLAGS),
+ MCDI_DWORD(outbuf, GET_LINK_OUT_FCNTL));
+
+ /* Default to Autonegotiated flow control if the PHY supports it */
+ efx->wanted_fc = EFX_FC_RX | EFX_FC_TX;
+ if (phy_data->supported_cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
+ efx->wanted_fc |= EFX_FC_AUTO;
+ efx_link_set_wanted_fc(efx, efx->wanted_fc);
+
+ return 0;
+
+fail:
+ kfree(phy_data);
+ return rc;
+}
+
+int efx_mcdi_port_reconfigure(struct efx_nic *efx)
+{
+ struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
+ u32 caps = (efx->link_advertising ?
+ ethtool_to_mcdi_cap(efx->link_advertising) :
+ phy_cfg->forced_cap);
+
+ return efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
+ efx->loopback_mode, 0);
+}
+
+/* Verify that the forced flow control settings (!EFX_FC_AUTO) are
+ * supported by the link partner. Warn the user if this isn't the case
+ */
+static void efx_mcdi_phy_check_fcntl(struct efx_nic *efx, u32 lpa)
+{
+ struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
+ u32 rmtadv;
+
+ /* The link partner capabilities are only relevant if the
+ * link supports flow control autonegotiation */
+ if (~phy_cfg->supported_cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
+ return;
+
+ /* If flow control autoneg is supported and enabled, then fine */
+ if (efx->wanted_fc & EFX_FC_AUTO)
+ return;
+
+ rmtadv = 0;
+ if (lpa & (1 << MC_CMD_PHY_CAP_PAUSE_LBN))
+ rmtadv |= ADVERTISED_Pause;
+ if (lpa & (1 << MC_CMD_PHY_CAP_ASYM_LBN))
+ rmtadv |= ADVERTISED_Asym_Pause;
+
+ if ((efx->wanted_fc & EFX_FC_TX) && rmtadv == ADVERTISED_Asym_Pause)
+ netif_err(efx, link, efx->net_dev,
+ "warning: link partner doesn't support pause frames");
+}
+
+static bool efx_mcdi_phy_poll(struct efx_nic *efx)
+{
+ struct efx_link_state old_state = efx->link_state;
+ MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
+ int rc;
+
+ WARN_ON(!mutex_is_locked(&efx->mac_lock));
+
+ BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
+
+ rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
+ outbuf, sizeof(outbuf), NULL);
+ if (rc)
+ efx->link_state.up = false;
+ else
+ efx_mcdi_phy_decode_link(
+ efx, &efx->link_state,
+ MCDI_DWORD(outbuf, GET_LINK_OUT_LINK_SPEED),
+ MCDI_DWORD(outbuf, GET_LINK_OUT_FLAGS),
+ MCDI_DWORD(outbuf, GET_LINK_OUT_FCNTL));
+
+ return !efx_link_state_equal(&efx->link_state, &old_state);
+}
+
+static void efx_mcdi_phy_remove(struct efx_nic *efx)
+{
+ struct efx_mcdi_phy_data *phy_data = efx->phy_data;
+
+ efx->phy_data = NULL;
+ kfree(phy_data);
+}
+
+static void efx_mcdi_phy_get_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd)
+{
+ struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
+ MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
+ int rc;
+
+ ecmd->supported =
+ mcdi_to_ethtool_cap(phy_cfg->media, phy_cfg->supported_cap);
+ ecmd->advertising = efx->link_advertising;
+ ethtool_cmd_speed_set(ecmd, efx->link_state.speed);
+ ecmd->duplex = efx->link_state.fd;
+ ecmd->port = mcdi_to_ethtool_media(phy_cfg->media);
+ ecmd->phy_address = phy_cfg->port;
+ ecmd->transceiver = XCVR_INTERNAL;
+ ecmd->autoneg = !!(efx->link_advertising & ADVERTISED_Autoneg);
+ ecmd->mdio_support = (efx->mdio.mode_support &
+ (MDIO_SUPPORTS_C45 | MDIO_SUPPORTS_C22));
+
+ BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
+ rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
+ outbuf, sizeof(outbuf), NULL);
+ if (rc)
+ return;
+ ecmd->lp_advertising =
+ mcdi_to_ethtool_cap(phy_cfg->media,
+ MCDI_DWORD(outbuf, GET_LINK_OUT_LP_CAP));
+}
+
+static int efx_mcdi_phy_set_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd)
+{
+ struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
+ u32 caps;
+ int rc;
+
+ if (ecmd->autoneg) {
+ caps = (ethtool_to_mcdi_cap(ecmd->advertising) |
+ 1 << MC_CMD_PHY_CAP_AN_LBN);
+ } else if (ecmd->duplex) {
+ switch (ethtool_cmd_speed(ecmd)) {
+ case 10: caps = 1 << MC_CMD_PHY_CAP_10FDX_LBN; break;
+ case 100: caps = 1 << MC_CMD_PHY_CAP_100FDX_LBN; break;
+ case 1000: caps = 1 << MC_CMD_PHY_CAP_1000FDX_LBN; break;
+ case 10000: caps = 1 << MC_CMD_PHY_CAP_10000FDX_LBN; break;
+ case 40000: caps = 1 << MC_CMD_PHY_CAP_40000FDX_LBN; break;
+ default: return -EINVAL;
+ }
+ } else {
+ switch (ethtool_cmd_speed(ecmd)) {
+ case 10: caps = 1 << MC_CMD_PHY_CAP_10HDX_LBN; break;
+ case 100: caps = 1 << MC_CMD_PHY_CAP_100HDX_LBN; break;
+ case 1000: caps = 1 << MC_CMD_PHY_CAP_1000HDX_LBN; break;
+ default: return -EINVAL;
+ }
+ }
+
+ rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
+ efx->loopback_mode, 0);
+ if (rc)
+ return rc;
+
+ if (ecmd->autoneg) {
+ efx_link_set_advertising(
+ efx, ecmd->advertising | ADVERTISED_Autoneg);
+ phy_cfg->forced_cap = 0;
+ } else {
+ efx_link_set_advertising(efx, 0);
+ phy_cfg->forced_cap = caps;
+ }
+ return 0;
+}
+
+static int efx_mcdi_phy_test_alive(struct efx_nic *efx)
+{
+ MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_STATE_OUT_LEN);
+ size_t outlen;
+ int rc;
+
+ BUILD_BUG_ON(MC_CMD_GET_PHY_STATE_IN_LEN != 0);
+
+ rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_STATE, NULL, 0,
+ outbuf, sizeof(outbuf), &outlen);
+ if (rc)
+ return rc;
+
+ if (outlen < MC_CMD_GET_PHY_STATE_OUT_LEN)
+ return -EIO;
+ if (MCDI_DWORD(outbuf, GET_PHY_STATE_OUT_STATE) != MC_CMD_PHY_STATE_OK)
+ return -EINVAL;
+
+ return 0;
+}
+
+static const char *const mcdi_sft9001_cable_diag_names[] = {
+ "cable.pairA.length",
+ "cable.pairB.length",
+ "cable.pairC.length",
+ "cable.pairD.length",
+ "cable.pairA.status",
+ "cable.pairB.status",
+ "cable.pairC.status",
+ "cable.pairD.status",
+};
+
+static int efx_mcdi_bist(struct efx_nic *efx, unsigned int bist_mode,
+ int *results)
+{
+ unsigned int retry, i, count = 0;
+ size_t outlen;
+ u32 status;
+ MCDI_DECLARE_BUF(inbuf, MC_CMD_START_BIST_IN_LEN);
+ MCDI_DECLARE_BUF(outbuf, MC_CMD_POLL_BIST_OUT_SFT9001_LEN);
+ u8 *ptr;
+ int rc;
+
+ BUILD_BUG_ON(MC_CMD_START_BIST_OUT_LEN != 0);
+ MCDI_SET_DWORD(inbuf, START_BIST_IN_TYPE, bist_mode);
+ rc = efx_mcdi_rpc(efx, MC_CMD_START_BIST,
+ inbuf, MC_CMD_START_BIST_IN_LEN, NULL, 0, NULL);
+ if (rc)
+ goto out;
+
+ /* Wait up to 10s for BIST to finish */
+ for (retry = 0; retry < 100; ++retry) {
+ BUILD_BUG_ON(MC_CMD_POLL_BIST_IN_LEN != 0);
+ rc = efx_mcdi_rpc(efx, MC_CMD_POLL_BIST, NULL, 0,
+ outbuf, sizeof(outbuf), &outlen);
+ if (rc)
+ goto out;
+
+ status = MCDI_DWORD(outbuf, POLL_BIST_OUT_RESULT);
+ if (status != MC_CMD_POLL_BIST_RUNNING)
+ goto finished;
+
+ msleep(100);
+ }
+
+ rc = -ETIMEDOUT;
+ goto out;
+
+finished:
+ results[count++] = (status == MC_CMD_POLL_BIST_PASSED) ? 1 : -1;
+
+ /* SFT9001 specific cable diagnostics output */
+ if (efx->phy_type == PHY_TYPE_SFT9001B &&
+ (bist_mode == MC_CMD_PHY_BIST_CABLE_SHORT ||
+ bist_mode == MC_CMD_PHY_BIST_CABLE_LONG)) {
+ ptr = MCDI_PTR(outbuf, POLL_BIST_OUT_SFT9001_CABLE_LENGTH_A);
+ if (status == MC_CMD_POLL_BIST_PASSED &&
+ outlen >= MC_CMD_POLL_BIST_OUT_SFT9001_LEN) {
+ for (i = 0; i < 8; i++) {
+ results[count + i] =
+ EFX_DWORD_FIELD(((efx_dword_t *)ptr)[i],
+ EFX_DWORD_0);
+ }
+ }
+ count += 8;
+ }
+ rc = count;
+
+out:
+ return rc;
+}
+
+static int efx_mcdi_phy_run_tests(struct efx_nic *efx, int *results,
+ unsigned flags)
+{
+ struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
+ u32 mode;
+ int rc;
+
+ if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) {
+ rc = efx_mcdi_bist(efx, MC_CMD_PHY_BIST, results);
+ if (rc < 0)
+ return rc;
+
+ results += rc;
+ }
+
+ /* If we support both LONG and SHORT, then run each in response to
+ * break or not. Otherwise, run the one we support */
+ mode = 0;
+ if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN)) {
+ if ((flags & ETH_TEST_FL_OFFLINE) &&
+ (phy_cfg->flags &
+ (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN)))
+ mode = MC_CMD_PHY_BIST_CABLE_LONG;
+ else
+ mode = MC_CMD_PHY_BIST_CABLE_SHORT;
+ } else if (phy_cfg->flags &
+ (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))
+ mode = MC_CMD_PHY_BIST_CABLE_LONG;
+
+ if (mode != 0) {
+ rc = efx_mcdi_bist(efx, mode, results);
+ if (rc < 0)
+ return rc;
+ results += rc;
+ }
+
+ return 0;
+}
+
+static const char *efx_mcdi_phy_test_name(struct efx_nic *efx,
+ unsigned int index)
+{
+ struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
+
+ if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) {
+ if (index == 0)
+ return "bist";
+ --index;
+ }
+
+ if (phy_cfg->flags & ((1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN) |
+ (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))) {
+ if (index == 0)
+ return "cable";
+ --index;
+
+ if (efx->phy_type == PHY_TYPE_SFT9001B) {
+ if (index < ARRAY_SIZE(mcdi_sft9001_cable_diag_names))
+ return mcdi_sft9001_cable_diag_names[index];
+ index -= ARRAY_SIZE(mcdi_sft9001_cable_diag_names);
+ }
+ }
+
+ return NULL;
+}
+
+#define SFP_PAGE_SIZE 128
+#define SFP_NUM_PAGES 2
+static int efx_mcdi_phy_get_module_eeprom(struct efx_nic *efx,
+ struct ethtool_eeprom *ee, u8 *data)
+{
+ MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_MEDIA_INFO_OUT_LENMAX);
+ MCDI_DECLARE_BUF(inbuf, MC_CMD_GET_PHY_MEDIA_INFO_IN_LEN);
+ size_t outlen;
+ int rc;
+ unsigned int payload_len;
+ unsigned int space_remaining = ee->len;
+ unsigned int page;
+ unsigned int page_off;
+ unsigned int to_copy;
+ u8 *user_data = data;
+
+ BUILD_BUG_ON(SFP_PAGE_SIZE * SFP_NUM_PAGES != ETH_MODULE_SFF_8079_LEN);
+
+ page_off = ee->offset % SFP_PAGE_SIZE;
+ page = ee->offset / SFP_PAGE_SIZE;
+
+ while (space_remaining && (page < SFP_NUM_PAGES)) {
+ MCDI_SET_DWORD(inbuf, GET_PHY_MEDIA_INFO_IN_PAGE, page);
+
+ rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_MEDIA_INFO,
+ inbuf, sizeof(inbuf),
+ outbuf, sizeof(outbuf),
+ &outlen);
+ if (rc)
+ return rc;
+
+ if (outlen < (MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_OFST +
+ SFP_PAGE_SIZE))
+ return -EIO;
+
+ payload_len = MCDI_DWORD(outbuf,
+ GET_PHY_MEDIA_INFO_OUT_DATALEN);
+ if (payload_len != SFP_PAGE_SIZE)
+ return -EIO;
+
+ /* Copy as much as we can into data */
+ payload_len -= page_off;
+ to_copy = (space_remaining < payload_len) ?
+ space_remaining : payload_len;
+
+ memcpy(user_data,
+ MCDI_PTR(outbuf, GET_PHY_MEDIA_INFO_OUT_DATA) + page_off,
+ to_copy);
+
+ space_remaining -= to_copy;
+ user_data += to_copy;
+ page_off = 0;
+ page++;
+ }
+
+ return 0;
+}
+
+static int efx_mcdi_phy_get_module_info(struct efx_nic *efx,
+ struct ethtool_modinfo *modinfo)
+{
+ struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
+
+ switch (phy_cfg->media) {
+ case MC_CMD_MEDIA_SFP_PLUS:
+ modinfo->type = ETH_MODULE_SFF_8079;
+ modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN;
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static const struct efx_phy_operations efx_mcdi_phy_ops = {
+ .probe = efx_mcdi_phy_probe,
+ .init = efx_port_dummy_op_int,
+ .reconfigure = efx_mcdi_port_reconfigure,
+ .poll = efx_mcdi_phy_poll,
+ .fini = efx_port_dummy_op_void,
+ .remove = efx_mcdi_phy_remove,
+ .get_settings = efx_mcdi_phy_get_settings,
+ .set_settings = efx_mcdi_phy_set_settings,
+ .test_alive = efx_mcdi_phy_test_alive,
+ .run_tests = efx_mcdi_phy_run_tests,
+ .test_name = efx_mcdi_phy_test_name,
+ .get_module_eeprom = efx_mcdi_phy_get_module_eeprom,
+ .get_module_info = efx_mcdi_phy_get_module_info,
+};
+
+u32 efx_mcdi_phy_get_caps(struct efx_nic *efx)
+{
+ struct efx_mcdi_phy_data *phy_data = efx->phy_data;
+
+ return phy_data->supported_cap;
+}
+
+static unsigned int efx_mcdi_event_link_speed[] = {
+ [MCDI_EVENT_LINKCHANGE_SPEED_100M] = 100,
+ [MCDI_EVENT_LINKCHANGE_SPEED_1G] = 1000,
+ [MCDI_EVENT_LINKCHANGE_SPEED_10G] = 10000,
+ [MCDI_EVENT_LINKCHANGE_SPEED_40G] = 40000,
+};
+
+void efx_mcdi_process_link_change(struct efx_nic *efx, efx_qword_t *ev)
+{
+ u32 flags, fcntl, speed, lpa;
+
+ speed = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_SPEED);
+ EFX_BUG_ON_PARANOID(speed >= ARRAY_SIZE(efx_mcdi_event_link_speed));
+ speed = efx_mcdi_event_link_speed[speed];
+
+ flags = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_LINK_FLAGS);
+ fcntl = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_FCNTL);
+ lpa = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_LP_CAP);
+
+ /* efx->link_state is only modified by efx_mcdi_phy_get_link(),
+ * which is only run after flushing the event queues. Therefore, it
+ * is safe to modify the link state outside of the mac_lock here.
+ */
+ efx_mcdi_phy_decode_link(efx, &efx->link_state, speed, flags, fcntl);
+
+ efx_mcdi_phy_check_fcntl(efx, lpa);
+
+ efx_link_status_changed(efx);
+}
+
+int efx_mcdi_set_mac(struct efx_nic *efx)
+{
+ u32 fcntl;
+ MCDI_DECLARE_BUF(cmdbytes, MC_CMD_SET_MAC_IN_LEN);
+
+ BUILD_BUG_ON(MC_CMD_SET_MAC_OUT_LEN != 0);
+
+ ether_addr_copy(MCDI_PTR(cmdbytes, SET_MAC_IN_ADDR),
+ efx->net_dev->dev_addr);
+
+ MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_MTU,
+ EFX_MAX_FRAME_LEN(efx->net_dev->mtu));
+ MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_DRAIN, 0);
+
+ /* Set simple MAC filter for Siena */
+ MCDI_POPULATE_DWORD_1(cmdbytes, SET_MAC_IN_REJECT,
+ SET_MAC_IN_REJECT_UNCST, efx->unicast_filter);
+
+ switch (efx->wanted_fc) {
+ case EFX_FC_RX | EFX_FC_TX:
+ fcntl = MC_CMD_FCNTL_BIDIR;
+ break;
+ case EFX_FC_RX:
+ fcntl = MC_CMD_FCNTL_RESPOND;
+ break;
+ default:
+ fcntl = MC_CMD_FCNTL_OFF;
+ break;
+ }
+ if (efx->wanted_fc & EFX_FC_AUTO)
+ fcntl = MC_CMD_FCNTL_AUTO;
+ if (efx->fc_disable)
+ fcntl = MC_CMD_FCNTL_OFF;
+
+ MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_FCNTL, fcntl);
+
+ return efx_mcdi_rpc(efx, MC_CMD_SET_MAC, cmdbytes, sizeof(cmdbytes),
+ NULL, 0, NULL);
+}
+
+bool efx_mcdi_mac_check_fault(struct efx_nic *efx)
+{
+ MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
+ size_t outlength;
+ int rc;
+
+ BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
+
+ rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
+ outbuf, sizeof(outbuf), &outlength);
+ if (rc)
+ return true;
+
+ return MCDI_DWORD(outbuf, GET_LINK_OUT_MAC_FAULT) != 0;
+}
+
+enum efx_stats_action {
+ EFX_STATS_ENABLE,
+ EFX_STATS_DISABLE,
+ EFX_STATS_PULL,
+};
+
+static int efx_mcdi_mac_stats(struct efx_nic *efx,
+ enum efx_stats_action action, int clear)
+{
+ MCDI_DECLARE_BUF(inbuf, MC_CMD_MAC_STATS_IN_LEN);
+ int rc;
+ int change = action == EFX_STATS_PULL ? 0 : 1;
+ int enable = action == EFX_STATS_ENABLE ? 1 : 0;
+ int period = action == EFX_STATS_ENABLE ? 1000 : 0;
+ dma_addr_t dma_addr = efx->stats_buffer.dma_addr;
+ u32 dma_len = action != EFX_STATS_DISABLE ?
+ MC_CMD_MAC_NSTATS * sizeof(u64) : 0;
+
+ BUILD_BUG_ON(MC_CMD_MAC_STATS_OUT_DMA_LEN != 0);
+
+ MCDI_SET_QWORD(inbuf, MAC_STATS_IN_DMA_ADDR, dma_addr);
+ MCDI_POPULATE_DWORD_7(inbuf, MAC_STATS_IN_CMD,
+ MAC_STATS_IN_DMA, !!enable,
+ MAC_STATS_IN_CLEAR, clear,
+ MAC_STATS_IN_PERIODIC_CHANGE, change,
+ MAC_STATS_IN_PERIODIC_ENABLE, enable,
+ MAC_STATS_IN_PERIODIC_CLEAR, 0,
+ MAC_STATS_IN_PERIODIC_NOEVENT, 1,
+ MAC_STATS_IN_PERIOD_MS, period);
+ MCDI_SET_DWORD(inbuf, MAC_STATS_IN_DMA_LEN, dma_len);
+
+ rc = efx_mcdi_rpc(efx, MC_CMD_MAC_STATS, inbuf, sizeof(inbuf),
+ NULL, 0, NULL);
+ return rc;
+}
+
+void efx_mcdi_mac_start_stats(struct efx_nic *efx)
+{
+ __le64 *dma_stats = efx->stats_buffer.addr;
+
+ dma_stats[MC_CMD_MAC_GENERATION_END] = EFX_MC_STATS_GENERATION_INVALID;
+
+ efx_mcdi_mac_stats(efx, EFX_STATS_ENABLE, 0);
+}
+
+void efx_mcdi_mac_stop_stats(struct efx_nic *efx)
+{
+ efx_mcdi_mac_stats(efx, EFX_STATS_DISABLE, 0);
+}
+
+#define EFX_MAC_STATS_WAIT_US 100
+#define EFX_MAC_STATS_WAIT_ATTEMPTS 10
+
+void efx_mcdi_mac_pull_stats(struct efx_nic *efx)
+{
+ __le64 *dma_stats = efx->stats_buffer.addr;
+ int attempts = EFX_MAC_STATS_WAIT_ATTEMPTS;
+
+ dma_stats[MC_CMD_MAC_GENERATION_END] = EFX_MC_STATS_GENERATION_INVALID;
+ efx_mcdi_mac_stats(efx, EFX_STATS_PULL, 0);
+
+ while (dma_stats[MC_CMD_MAC_GENERATION_END] ==
+ EFX_MC_STATS_GENERATION_INVALID &&
+ attempts-- != 0)
+ udelay(EFX_MAC_STATS_WAIT_US);
+}
+
+int efx_mcdi_port_probe(struct efx_nic *efx)
+{
+ int rc;
+
+ /* Hook in PHY operations table */
+ efx->phy_op = &efx_mcdi_phy_ops;
+
+ /* Set up MDIO structure for PHY */
+ efx->mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
+ efx->mdio.mdio_read = efx_mcdi_mdio_read;
+ efx->mdio.mdio_write = efx_mcdi_mdio_write;
+
+ /* Fill out MDIO structure, loopback modes, and initial link state */
+ rc = efx->phy_op->probe(efx);
+ if (rc != 0)
+ return rc;
+
+ /* Allocate buffer for stats */
+ rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer,
+ MC_CMD_MAC_NSTATS * sizeof(u64), GFP_KERNEL);
+ if (rc)
+ return rc;
+ netif_dbg(efx, probe, efx->net_dev,
+ "stats buffer at %llx (virt %p phys %llx)\n",
+ (u64)efx->stats_buffer.dma_addr,
+ efx->stats_buffer.addr,
+ (u64)virt_to_phys(efx->stats_buffer.addr));
+
+ efx_mcdi_mac_stats(efx, EFX_STATS_DISABLE, 1);
+
+ return 0;
+}
+
+void efx_mcdi_port_remove(struct efx_nic *efx)
+{
+ efx->phy_op->remove(efx);
+ efx_nic_free_buffer(efx, &efx->stats_buffer);
+}
+
+/* Get physical port number (EF10 only; on Siena it is same as PF number) */
+int efx_mcdi_port_get_number(struct efx_nic *efx)
+{
+ MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PORT_ASSIGNMENT_OUT_LEN);
+ int rc;
+
+ rc = efx_mcdi_rpc(efx, MC_CMD_GET_PORT_ASSIGNMENT, NULL, 0,
+ outbuf, sizeof(outbuf), NULL);
+ if (rc)
+ return rc;
+
+ return MCDI_DWORD(outbuf, GET_PORT_ASSIGNMENT_OUT_PORT);
+}
Code Review / kvmfornfv.git / blobdiff