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
efx_mcdi_mdio_read(struct net_device * net_dev,int prtad,int devad,u16 addr)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_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
efx_mcdi_mdio_write(struct net_device * net_dev,int prtad,int devad,u16 addr,u16 value)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_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
efx_mcdi_phy_get_caps(struct efx_nic * efx)73 u32 efx_mcdi_phy_get_caps(struct efx_nic *efx)
74 {
75 struct efx_mcdi_phy_data *phy_data = efx->phy_data;
76
77 return phy_data->supported_cap;
78 }
79
efx_mcdi_mac_check_fault(struct efx_nic * efx)80 bool efx_mcdi_mac_check_fault(struct efx_nic *efx)
81 {
82 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
83 size_t outlength;
84 int rc;
85
86 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
87
88 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
89 outbuf, sizeof(outbuf), &outlength);
90 if (rc)
91 return true;
92
93 return MCDI_DWORD(outbuf, GET_LINK_OUT_MAC_FAULT) != 0;
94 }
95
efx_mcdi_port_probe(struct efx_nic * efx)96 int efx_mcdi_port_probe(struct efx_nic *efx)
97 {
98 int rc;
99
100 /* Set up MDIO structure for PHY */
101 efx->mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
102 efx->mdio.mdio_read = efx_mcdi_mdio_read;
103 efx->mdio.mdio_write = efx_mcdi_mdio_write;
104
105 /* Fill out MDIO structure, loopback modes, and initial link state */
106 rc = efx_mcdi_phy_probe(efx);
107 if (rc != 0)
108 return rc;
109
110 return efx_mcdi_mac_init_stats(efx);
111 }
112
efx_mcdi_port_remove(struct efx_nic * efx)113 void efx_mcdi_port_remove(struct efx_nic *efx)
114 {
115 efx_mcdi_phy_remove(efx);
116 efx_mcdi_mac_fini_stats(efx);
117 }
118