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(dev: 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, inlen: sizeof(inbuf), |
35 | outbuf, outlen: sizeof(outbuf), outlen_actual: &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(dev: 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, inlen: sizeof(inbuf), |
62 | outbuf, outlen: sizeof(outbuf), outlen_actual: &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, inlen: 0, |
82 | outbuf, outlen: sizeof(outbuf), outlen_actual: &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 | |