1 files changed, 117 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/mcdi_port.c b/drivers/net/ethernet/sfc/mcdi_port.c
new file mode 100644
index 000000000..94c6a345c
--- /dev/null
+++ b/drivers/net/ethernet/sfc/mcdi_port.c
@@ -0,0 +1,117 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/****************************************************************************
+ * Driver for Solarflare network controllers and boards
+ * Copyright 2009-2013 Solarflare Communications Inc.
+ */
+
+/*
+ * Driver for PHY related operations via MCDI.
+ */
+
+#include <linux/slab.h>
+#include "efx.h"
+#include "mcdi_port.h"
+#include "mcdi.h"
+#include "mcdi_pcol.h"
+#include "nic.h"
+#include "selftest.h"
+#include "mcdi_port_common.h"
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+int efx_mcdi_port_probe(struct efx_nic *efx)
+{
+	int rc;
+
+	/* 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_mcdi_phy_probe(efx);
+	if (rc != 0)
+		return rc;
+
+	return efx_mcdi_mac_init_stats(efx);
+}
+
+void efx_mcdi_port_remove(struct efx_nic *efx)
+{
+	efx_mcdi_phy_remove(efx);
+	efx_mcdi_mac_fini_stats(efx);
+}