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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
20static int efx_mcdi_mdio_read(struct net_device *net_dev,
21 int prtad, int devad, u16 addr)
22{
23 struct efx_nic *efx = 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
46static 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 = 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
73u32 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
80bool 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
96int 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
113void efx_mcdi_port_remove(struct efx_nic *efx)
114{
115 efx_mcdi_phy_remove(efx);
116 efx_mcdi_mac_fini_stats(efx);
117}
1/****************************************************************************
2 * Driver for Solarflare network controllers and boards
3 * Copyright 2009-2013 Solarflare Communications Inc.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published
7 * by the Free Software Foundation, incorporated herein by reference.
8 */
9
10/*
11 * Driver for PHY related operations via MCDI.
12 */
13
14#include <linux/slab.h>
15#include "efx.h"
16#include "mcdi.h"
17#include "mcdi_pcol.h"
18#include "nic.h"
19#include "selftest.h"
20
21struct efx_mcdi_phy_data {
22 u32 flags;
23 u32 type;
24 u32 supported_cap;
25 u32 channel;
26 u32 port;
27 u32 stats_mask;
28 u8 name[20];
29 u32 media;
30 u32 mmd_mask;
31 u8 revision[20];
32 u32 forced_cap;
33};
34
35static int
36efx_mcdi_get_phy_cfg(struct efx_nic *efx, struct efx_mcdi_phy_data *cfg)
37{
38 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_CFG_OUT_LEN);
39 size_t outlen;
40 int rc;
41
42 BUILD_BUG_ON(MC_CMD_GET_PHY_CFG_IN_LEN != 0);
43 BUILD_BUG_ON(MC_CMD_GET_PHY_CFG_OUT_NAME_LEN != sizeof(cfg->name));
44
45 rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_CFG, NULL, 0,
46 outbuf, sizeof(outbuf), &outlen);
47 if (rc)
48 goto fail;
49
50 if (outlen < MC_CMD_GET_PHY_CFG_OUT_LEN) {
51 rc = -EIO;
52 goto fail;
53 }
54
55 cfg->flags = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_FLAGS);
56 cfg->type = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_TYPE);
57 cfg->supported_cap =
58 MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_SUPPORTED_CAP);
59 cfg->channel = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_CHANNEL);
60 cfg->port = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_PRT);
61 cfg->stats_mask = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_STATS_MASK);
62 memcpy(cfg->name, MCDI_PTR(outbuf, GET_PHY_CFG_OUT_NAME),
63 sizeof(cfg->name));
64 cfg->media = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_MEDIA_TYPE);
65 cfg->mmd_mask = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_MMD_MASK);
66 memcpy(cfg->revision, MCDI_PTR(outbuf, GET_PHY_CFG_OUT_REVISION),
67 sizeof(cfg->revision));
68
69 return 0;
70
71fail:
72 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
73 return rc;
74}
75
76static int efx_mcdi_set_link(struct efx_nic *efx, u32 capabilities,
77 u32 flags, u32 loopback_mode,
78 u32 loopback_speed)
79{
80 MCDI_DECLARE_BUF(inbuf, MC_CMD_SET_LINK_IN_LEN);
81 int rc;
82
83 BUILD_BUG_ON(MC_CMD_SET_LINK_OUT_LEN != 0);
84
85 MCDI_SET_DWORD(inbuf, SET_LINK_IN_CAP, capabilities);
86 MCDI_SET_DWORD(inbuf, SET_LINK_IN_FLAGS, flags);
87 MCDI_SET_DWORD(inbuf, SET_LINK_IN_LOOPBACK_MODE, loopback_mode);
88 MCDI_SET_DWORD(inbuf, SET_LINK_IN_LOOPBACK_SPEED, loopback_speed);
89
90 rc = efx_mcdi_rpc(efx, MC_CMD_SET_LINK, inbuf, sizeof(inbuf),
91 NULL, 0, NULL);
92 return rc;
93}
94
95static int efx_mcdi_loopback_modes(struct efx_nic *efx, u64 *loopback_modes)
96{
97 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LOOPBACK_MODES_OUT_LEN);
98 size_t outlen;
99 int rc;
100
101 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LOOPBACK_MODES, NULL, 0,
102 outbuf, sizeof(outbuf), &outlen);
103 if (rc)
104 goto fail;
105
106 if (outlen < (MC_CMD_GET_LOOPBACK_MODES_OUT_SUGGESTED_OFST +
107 MC_CMD_GET_LOOPBACK_MODES_OUT_SUGGESTED_LEN)) {
108 rc = -EIO;
109 goto fail;
110 }
111
112 *loopback_modes = MCDI_QWORD(outbuf, GET_LOOPBACK_MODES_OUT_SUGGESTED);
113
114 return 0;
115
116fail:
117 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
118 return rc;
119}
120
121static int efx_mcdi_mdio_read(struct net_device *net_dev,
122 int prtad, int devad, u16 addr)
123{
124 struct efx_nic *efx = netdev_priv(net_dev);
125 MCDI_DECLARE_BUF(inbuf, MC_CMD_MDIO_READ_IN_LEN);
126 MCDI_DECLARE_BUF(outbuf, MC_CMD_MDIO_READ_OUT_LEN);
127 size_t outlen;
128 int rc;
129
130 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_BUS, efx->mdio_bus);
131 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_PRTAD, prtad);
132 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_DEVAD, devad);
133 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_ADDR, addr);
134
135 rc = efx_mcdi_rpc(efx, MC_CMD_MDIO_READ, inbuf, sizeof(inbuf),
136 outbuf, sizeof(outbuf), &outlen);
137 if (rc)
138 return rc;
139
140 if (MCDI_DWORD(outbuf, MDIO_READ_OUT_STATUS) !=
141 MC_CMD_MDIO_STATUS_GOOD)
142 return -EIO;
143
144 return (u16)MCDI_DWORD(outbuf, MDIO_READ_OUT_VALUE);
145}
146
147static int efx_mcdi_mdio_write(struct net_device *net_dev,
148 int prtad, int devad, u16 addr, u16 value)
149{
150 struct efx_nic *efx = netdev_priv(net_dev);
151 MCDI_DECLARE_BUF(inbuf, MC_CMD_MDIO_WRITE_IN_LEN);
152 MCDI_DECLARE_BUF(outbuf, MC_CMD_MDIO_WRITE_OUT_LEN);
153 size_t outlen;
154 int rc;
155
156 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_BUS, efx->mdio_bus);
157 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_PRTAD, prtad);
158 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_DEVAD, devad);
159 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_ADDR, addr);
160 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_VALUE, value);
161
162 rc = efx_mcdi_rpc(efx, MC_CMD_MDIO_WRITE, inbuf, sizeof(inbuf),
163 outbuf, sizeof(outbuf), &outlen);
164 if (rc)
165 return rc;
166
167 if (MCDI_DWORD(outbuf, MDIO_WRITE_OUT_STATUS) !=
168 MC_CMD_MDIO_STATUS_GOOD)
169 return -EIO;
170
171 return 0;
172}
173
174static void mcdi_to_ethtool_linkset(u32 media, u32 cap, unsigned long *linkset)
175{
176 #define SET_BIT(name) __set_bit(ETHTOOL_LINK_MODE_ ## name ## _BIT, \
177 linkset)
178
179 bitmap_zero(linkset, __ETHTOOL_LINK_MODE_MASK_NBITS);
180 switch (media) {
181 case MC_CMD_MEDIA_KX4:
182 SET_BIT(Backplane);
183 if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
184 SET_BIT(1000baseKX_Full);
185 if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
186 SET_BIT(10000baseKX4_Full);
187 if (cap & (1 << MC_CMD_PHY_CAP_40000FDX_LBN))
188 SET_BIT(40000baseKR4_Full);
189 break;
190
191 case MC_CMD_MEDIA_XFP:
192 case MC_CMD_MEDIA_SFP_PLUS:
193 case MC_CMD_MEDIA_QSFP_PLUS:
194 SET_BIT(FIBRE);
195 if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
196 SET_BIT(1000baseT_Full);
197 if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
198 SET_BIT(10000baseT_Full);
199 if (cap & (1 << MC_CMD_PHY_CAP_40000FDX_LBN))
200 SET_BIT(40000baseCR4_Full);
201 if (cap & (1 << MC_CMD_PHY_CAP_100000FDX_LBN))
202 SET_BIT(100000baseCR4_Full);
203 if (cap & (1 << MC_CMD_PHY_CAP_25000FDX_LBN))
204 SET_BIT(25000baseCR_Full);
205 if (cap & (1 << MC_CMD_PHY_CAP_50000FDX_LBN))
206 SET_BIT(50000baseCR2_Full);
207 break;
208
209 case MC_CMD_MEDIA_BASE_T:
210 SET_BIT(TP);
211 if (cap & (1 << MC_CMD_PHY_CAP_10HDX_LBN))
212 SET_BIT(10baseT_Half);
213 if (cap & (1 << MC_CMD_PHY_CAP_10FDX_LBN))
214 SET_BIT(10baseT_Full);
215 if (cap & (1 << MC_CMD_PHY_CAP_100HDX_LBN))
216 SET_BIT(100baseT_Half);
217 if (cap & (1 << MC_CMD_PHY_CAP_100FDX_LBN))
218 SET_BIT(100baseT_Full);
219 if (cap & (1 << MC_CMD_PHY_CAP_1000HDX_LBN))
220 SET_BIT(1000baseT_Half);
221 if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
222 SET_BIT(1000baseT_Full);
223 if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
224 SET_BIT(10000baseT_Full);
225 break;
226 }
227
228 if (cap & (1 << MC_CMD_PHY_CAP_PAUSE_LBN))
229 SET_BIT(Pause);
230 if (cap & (1 << MC_CMD_PHY_CAP_ASYM_LBN))
231 SET_BIT(Asym_Pause);
232 if (cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
233 SET_BIT(Autoneg);
234
235 #undef SET_BIT
236}
237
238static u32 ethtool_linkset_to_mcdi_cap(const unsigned long *linkset)
239{
240 u32 result = 0;
241
242 #define TEST_BIT(name) test_bit(ETHTOOL_LINK_MODE_ ## name ## _BIT, \
243 linkset)
244
245 if (TEST_BIT(10baseT_Half))
246 result |= (1 << MC_CMD_PHY_CAP_10HDX_LBN);
247 if (TEST_BIT(10baseT_Full))
248 result |= (1 << MC_CMD_PHY_CAP_10FDX_LBN);
249 if (TEST_BIT(100baseT_Half))
250 result |= (1 << MC_CMD_PHY_CAP_100HDX_LBN);
251 if (TEST_BIT(100baseT_Full))
252 result |= (1 << MC_CMD_PHY_CAP_100FDX_LBN);
253 if (TEST_BIT(1000baseT_Half))
254 result |= (1 << MC_CMD_PHY_CAP_1000HDX_LBN);
255 if (TEST_BIT(1000baseT_Full) || TEST_BIT(1000baseKX_Full))
256 result |= (1 << MC_CMD_PHY_CAP_1000FDX_LBN);
257 if (TEST_BIT(10000baseT_Full) || TEST_BIT(10000baseKX4_Full))
258 result |= (1 << MC_CMD_PHY_CAP_10000FDX_LBN);
259 if (TEST_BIT(40000baseCR4_Full) || TEST_BIT(40000baseKR4_Full))
260 result |= (1 << MC_CMD_PHY_CAP_40000FDX_LBN);
261 if (TEST_BIT(100000baseCR4_Full))
262 result |= (1 << MC_CMD_PHY_CAP_100000FDX_LBN);
263 if (TEST_BIT(25000baseCR_Full))
264 result |= (1 << MC_CMD_PHY_CAP_25000FDX_LBN);
265 if (TEST_BIT(50000baseCR2_Full))
266 result |= (1 << MC_CMD_PHY_CAP_50000FDX_LBN);
267 if (TEST_BIT(Pause))
268 result |= (1 << MC_CMD_PHY_CAP_PAUSE_LBN);
269 if (TEST_BIT(Asym_Pause))
270 result |= (1 << MC_CMD_PHY_CAP_ASYM_LBN);
271 if (TEST_BIT(Autoneg))
272 result |= (1 << MC_CMD_PHY_CAP_AN_LBN);
273
274 #undef TEST_BIT
275
276 return result;
277}
278
279static u32 efx_get_mcdi_phy_flags(struct efx_nic *efx)
280{
281 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
282 enum efx_phy_mode mode, supported;
283 u32 flags;
284
285 /* TODO: Advertise the capabilities supported by this PHY */
286 supported = 0;
287 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_TXDIS_LBN))
288 supported |= PHY_MODE_TX_DISABLED;
289 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_LOWPOWER_LBN))
290 supported |= PHY_MODE_LOW_POWER;
291 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_POWEROFF_LBN))
292 supported |= PHY_MODE_OFF;
293
294 mode = efx->phy_mode & supported;
295
296 flags = 0;
297 if (mode & PHY_MODE_TX_DISABLED)
298 flags |= (1 << MC_CMD_SET_LINK_IN_TXDIS_LBN);
299 if (mode & PHY_MODE_LOW_POWER)
300 flags |= (1 << MC_CMD_SET_LINK_IN_LOWPOWER_LBN);
301 if (mode & PHY_MODE_OFF)
302 flags |= (1 << MC_CMD_SET_LINK_IN_POWEROFF_LBN);
303
304 return flags;
305}
306
307static u8 mcdi_to_ethtool_media(u32 media)
308{
309 switch (media) {
310 case MC_CMD_MEDIA_XAUI:
311 case MC_CMD_MEDIA_CX4:
312 case MC_CMD_MEDIA_KX4:
313 return PORT_OTHER;
314
315 case MC_CMD_MEDIA_XFP:
316 case MC_CMD_MEDIA_SFP_PLUS:
317 case MC_CMD_MEDIA_QSFP_PLUS:
318 return PORT_FIBRE;
319
320 case MC_CMD_MEDIA_BASE_T:
321 return PORT_TP;
322
323 default:
324 return PORT_OTHER;
325 }
326}
327
328static void efx_mcdi_phy_decode_link(struct efx_nic *efx,
329 struct efx_link_state *link_state,
330 u32 speed, u32 flags, u32 fcntl)
331{
332 switch (fcntl) {
333 case MC_CMD_FCNTL_AUTO:
334 WARN_ON(1); /* This is not a link mode */
335 link_state->fc = EFX_FC_AUTO | EFX_FC_TX | EFX_FC_RX;
336 break;
337 case MC_CMD_FCNTL_BIDIR:
338 link_state->fc = EFX_FC_TX | EFX_FC_RX;
339 break;
340 case MC_CMD_FCNTL_RESPOND:
341 link_state->fc = EFX_FC_RX;
342 break;
343 default:
344 WARN_ON(1);
345 case MC_CMD_FCNTL_OFF:
346 link_state->fc = 0;
347 break;
348 }
349
350 link_state->up = !!(flags & (1 << MC_CMD_GET_LINK_OUT_LINK_UP_LBN));
351 link_state->fd = !!(flags & (1 << MC_CMD_GET_LINK_OUT_FULL_DUPLEX_LBN));
352 link_state->speed = speed;
353}
354
355/* The semantics of the ethtool FEC mode bitmask are not well defined,
356 * particularly the meaning of combinations of bits. Which means we get to
357 * define our own semantics, as follows:
358 * OFF overrides any other bits, and means "disable all FEC" (with the
359 * exception of 25G KR4/CR4, where it is not possible to reject it if AN
360 * partner requests it).
361 * AUTO on its own means use cable requirements and link partner autoneg with
362 * fw-default preferences for the cable type.
363 * AUTO and either RS or BASER means use the specified FEC type if cable and
364 * link partner support it, otherwise autoneg/fw-default.
365 * RS or BASER alone means use the specified FEC type if cable and link partner
366 * support it and either requests it, otherwise no FEC.
367 * Both RS and BASER (whether AUTO or not) means use FEC if cable and link
368 * partner support it, preferring RS to BASER.
369 */
370static u32 ethtool_fec_caps_to_mcdi(u32 ethtool_cap)
371{
372 u32 ret = 0;
373
374 if (ethtool_cap & ETHTOOL_FEC_OFF)
375 return 0;
376
377 if (ethtool_cap & ETHTOOL_FEC_AUTO)
378 ret |= (1 << MC_CMD_PHY_CAP_BASER_FEC_LBN) |
379 (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_LBN) |
380 (1 << MC_CMD_PHY_CAP_RS_FEC_LBN);
381 if (ethtool_cap & ETHTOOL_FEC_RS)
382 ret |= (1 << MC_CMD_PHY_CAP_RS_FEC_LBN) |
383 (1 << MC_CMD_PHY_CAP_RS_FEC_REQUESTED_LBN);
384 if (ethtool_cap & ETHTOOL_FEC_BASER)
385 ret |= (1 << MC_CMD_PHY_CAP_BASER_FEC_LBN) |
386 (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_LBN) |
387 (1 << MC_CMD_PHY_CAP_BASER_FEC_REQUESTED_LBN) |
388 (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_REQUESTED_LBN);
389 return ret;
390}
391
392/* Invert ethtool_fec_caps_to_mcdi. There are two combinations that function
393 * can never produce, (baser xor rs) and neither req; the implementation below
394 * maps both of those to AUTO. This should never matter, and it's not clear
395 * what a better mapping would be anyway.
396 */
397static u32 mcdi_fec_caps_to_ethtool(u32 caps, bool is_25g)
398{
399 bool rs = caps & (1 << MC_CMD_PHY_CAP_RS_FEC_LBN),
400 rs_req = caps & (1 << MC_CMD_PHY_CAP_RS_FEC_REQUESTED_LBN),
401 baser = is_25g ? caps & (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_LBN)
402 : caps & (1 << MC_CMD_PHY_CAP_BASER_FEC_LBN),
403 baser_req = is_25g ? caps & (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_REQUESTED_LBN)
404 : caps & (1 << MC_CMD_PHY_CAP_BASER_FEC_REQUESTED_LBN);
405
406 if (!baser && !rs)
407 return ETHTOOL_FEC_OFF;
408 return (rs_req ? ETHTOOL_FEC_RS : 0) |
409 (baser_req ? ETHTOOL_FEC_BASER : 0) |
410 (baser == baser_req && rs == rs_req ? 0 : ETHTOOL_FEC_AUTO);
411}
412
413static int efx_mcdi_phy_probe(struct efx_nic *efx)
414{
415 struct efx_mcdi_phy_data *phy_data;
416 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
417 u32 caps;
418 int rc;
419
420 /* Initialise and populate phy_data */
421 phy_data = kzalloc(sizeof(*phy_data), GFP_KERNEL);
422 if (phy_data == NULL)
423 return -ENOMEM;
424
425 rc = efx_mcdi_get_phy_cfg(efx, phy_data);
426 if (rc != 0)
427 goto fail;
428
429 /* Read initial link advertisement */
430 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
431 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
432 outbuf, sizeof(outbuf), NULL);
433 if (rc)
434 goto fail;
435
436 /* Fill out nic state */
437 efx->phy_data = phy_data;
438 efx->phy_type = phy_data->type;
439
440 efx->mdio_bus = phy_data->channel;
441 efx->mdio.prtad = phy_data->port;
442 efx->mdio.mmds = phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22);
443 efx->mdio.mode_support = 0;
444 if (phy_data->mmd_mask & (1 << MC_CMD_MMD_CLAUSE22))
445 efx->mdio.mode_support |= MDIO_SUPPORTS_C22;
446 if (phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22))
447 efx->mdio.mode_support |= MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
448
449 caps = MCDI_DWORD(outbuf, GET_LINK_OUT_CAP);
450 if (caps & (1 << MC_CMD_PHY_CAP_AN_LBN))
451 mcdi_to_ethtool_linkset(phy_data->media, caps,
452 efx->link_advertising);
453 else
454 phy_data->forced_cap = caps;
455
456 /* Assert that we can map efx -> mcdi loopback modes */
457 BUILD_BUG_ON(LOOPBACK_NONE != MC_CMD_LOOPBACK_NONE);
458 BUILD_BUG_ON(LOOPBACK_DATA != MC_CMD_LOOPBACK_DATA);
459 BUILD_BUG_ON(LOOPBACK_GMAC != MC_CMD_LOOPBACK_GMAC);
460 BUILD_BUG_ON(LOOPBACK_XGMII != MC_CMD_LOOPBACK_XGMII);
461 BUILD_BUG_ON(LOOPBACK_XGXS != MC_CMD_LOOPBACK_XGXS);
462 BUILD_BUG_ON(LOOPBACK_XAUI != MC_CMD_LOOPBACK_XAUI);
463 BUILD_BUG_ON(LOOPBACK_GMII != MC_CMD_LOOPBACK_GMII);
464 BUILD_BUG_ON(LOOPBACK_SGMII != MC_CMD_LOOPBACK_SGMII);
465 BUILD_BUG_ON(LOOPBACK_XGBR != MC_CMD_LOOPBACK_XGBR);
466 BUILD_BUG_ON(LOOPBACK_XFI != MC_CMD_LOOPBACK_XFI);
467 BUILD_BUG_ON(LOOPBACK_XAUI_FAR != MC_CMD_LOOPBACK_XAUI_FAR);
468 BUILD_BUG_ON(LOOPBACK_GMII_FAR != MC_CMD_LOOPBACK_GMII_FAR);
469 BUILD_BUG_ON(LOOPBACK_SGMII_FAR != MC_CMD_LOOPBACK_SGMII_FAR);
470 BUILD_BUG_ON(LOOPBACK_XFI_FAR != MC_CMD_LOOPBACK_XFI_FAR);
471 BUILD_BUG_ON(LOOPBACK_GPHY != MC_CMD_LOOPBACK_GPHY);
472 BUILD_BUG_ON(LOOPBACK_PHYXS != MC_CMD_LOOPBACK_PHYXS);
473 BUILD_BUG_ON(LOOPBACK_PCS != MC_CMD_LOOPBACK_PCS);
474 BUILD_BUG_ON(LOOPBACK_PMAPMD != MC_CMD_LOOPBACK_PMAPMD);
475 BUILD_BUG_ON(LOOPBACK_XPORT != MC_CMD_LOOPBACK_XPORT);
476 BUILD_BUG_ON(LOOPBACK_XGMII_WS != MC_CMD_LOOPBACK_XGMII_WS);
477 BUILD_BUG_ON(LOOPBACK_XAUI_WS != MC_CMD_LOOPBACK_XAUI_WS);
478 BUILD_BUG_ON(LOOPBACK_XAUI_WS_FAR != MC_CMD_LOOPBACK_XAUI_WS_FAR);
479 BUILD_BUG_ON(LOOPBACK_XAUI_WS_NEAR != MC_CMD_LOOPBACK_XAUI_WS_NEAR);
480 BUILD_BUG_ON(LOOPBACK_GMII_WS != MC_CMD_LOOPBACK_GMII_WS);
481 BUILD_BUG_ON(LOOPBACK_XFI_WS != MC_CMD_LOOPBACK_XFI_WS);
482 BUILD_BUG_ON(LOOPBACK_XFI_WS_FAR != MC_CMD_LOOPBACK_XFI_WS_FAR);
483 BUILD_BUG_ON(LOOPBACK_PHYXS_WS != MC_CMD_LOOPBACK_PHYXS_WS);
484
485 rc = efx_mcdi_loopback_modes(efx, &efx->loopback_modes);
486 if (rc != 0)
487 goto fail;
488 /* The MC indicates that LOOPBACK_NONE is a valid loopback mode,
489 * but by convention we don't */
490 efx->loopback_modes &= ~(1 << LOOPBACK_NONE);
491
492 /* Set the initial link mode */
493 efx_mcdi_phy_decode_link(
494 efx, &efx->link_state,
495 MCDI_DWORD(outbuf, GET_LINK_OUT_LINK_SPEED),
496 MCDI_DWORD(outbuf, GET_LINK_OUT_FLAGS),
497 MCDI_DWORD(outbuf, GET_LINK_OUT_FCNTL));
498
499 /* Record the initial FEC configuration (or nearest approximation
500 * representable in the ethtool configuration space)
501 */
502 efx->fec_config = mcdi_fec_caps_to_ethtool(caps,
503 efx->link_state.speed == 25000 ||
504 efx->link_state.speed == 50000);
505
506 /* Default to Autonegotiated flow control if the PHY supports it */
507 efx->wanted_fc = EFX_FC_RX | EFX_FC_TX;
508 if (phy_data->supported_cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
509 efx->wanted_fc |= EFX_FC_AUTO;
510 efx_link_set_wanted_fc(efx, efx->wanted_fc);
511
512 return 0;
513
514fail:
515 kfree(phy_data);
516 return rc;
517}
518
519int efx_mcdi_port_reconfigure(struct efx_nic *efx)
520{
521 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
522 u32 caps = (efx->link_advertising[0] ?
523 ethtool_linkset_to_mcdi_cap(efx->link_advertising) :
524 phy_cfg->forced_cap);
525
526 caps |= ethtool_fec_caps_to_mcdi(efx->fec_config);
527
528 return efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
529 efx->loopback_mode, 0);
530}
531
532/* Verify that the forced flow control settings (!EFX_FC_AUTO) are
533 * supported by the link partner. Warn the user if this isn't the case
534 */
535static void efx_mcdi_phy_check_fcntl(struct efx_nic *efx, u32 lpa)
536{
537 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
538 u32 rmtadv;
539
540 /* The link partner capabilities are only relevant if the
541 * link supports flow control autonegotiation */
542 if (~phy_cfg->supported_cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
543 return;
544
545 /* If flow control autoneg is supported and enabled, then fine */
546 if (efx->wanted_fc & EFX_FC_AUTO)
547 return;
548
549 rmtadv = 0;
550 if (lpa & (1 << MC_CMD_PHY_CAP_PAUSE_LBN))
551 rmtadv |= ADVERTISED_Pause;
552 if (lpa & (1 << MC_CMD_PHY_CAP_ASYM_LBN))
553 rmtadv |= ADVERTISED_Asym_Pause;
554
555 if ((efx->wanted_fc & EFX_FC_TX) && rmtadv == ADVERTISED_Asym_Pause)
556 netif_err(efx, link, efx->net_dev,
557 "warning: link partner doesn't support pause frames");
558}
559
560static bool efx_mcdi_phy_poll(struct efx_nic *efx)
561{
562 struct efx_link_state old_state = efx->link_state;
563 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
564 int rc;
565
566 WARN_ON(!mutex_is_locked(&efx->mac_lock));
567
568 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
569
570 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
571 outbuf, sizeof(outbuf), NULL);
572 if (rc)
573 efx->link_state.up = false;
574 else
575 efx_mcdi_phy_decode_link(
576 efx, &efx->link_state,
577 MCDI_DWORD(outbuf, GET_LINK_OUT_LINK_SPEED),
578 MCDI_DWORD(outbuf, GET_LINK_OUT_FLAGS),
579 MCDI_DWORD(outbuf, GET_LINK_OUT_FCNTL));
580
581 return !efx_link_state_equal(&efx->link_state, &old_state);
582}
583
584static void efx_mcdi_phy_remove(struct efx_nic *efx)
585{
586 struct efx_mcdi_phy_data *phy_data = efx->phy_data;
587
588 efx->phy_data = NULL;
589 kfree(phy_data);
590}
591
592static void efx_mcdi_phy_get_link_ksettings(struct efx_nic *efx,
593 struct ethtool_link_ksettings *cmd)
594{
595 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
596 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
597 int rc;
598
599 cmd->base.speed = efx->link_state.speed;
600 cmd->base.duplex = efx->link_state.fd;
601 cmd->base.port = mcdi_to_ethtool_media(phy_cfg->media);
602 cmd->base.phy_address = phy_cfg->port;
603 cmd->base.autoneg = !!(efx->link_advertising[0] & ADVERTISED_Autoneg);
604 cmd->base.mdio_support = (efx->mdio.mode_support &
605 (MDIO_SUPPORTS_C45 | MDIO_SUPPORTS_C22));
606
607 mcdi_to_ethtool_linkset(phy_cfg->media, phy_cfg->supported_cap,
608 cmd->link_modes.supported);
609 memcpy(cmd->link_modes.advertising, efx->link_advertising,
610 sizeof(__ETHTOOL_DECLARE_LINK_MODE_MASK()));
611
612 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
613 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
614 outbuf, sizeof(outbuf), NULL);
615 if (rc)
616 return;
617 mcdi_to_ethtool_linkset(phy_cfg->media,
618 MCDI_DWORD(outbuf, GET_LINK_OUT_LP_CAP),
619 cmd->link_modes.lp_advertising);
620}
621
622static int
623efx_mcdi_phy_set_link_ksettings(struct efx_nic *efx,
624 const struct ethtool_link_ksettings *cmd)
625{
626 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
627 u32 caps;
628 int rc;
629
630 if (cmd->base.autoneg) {
631 caps = (ethtool_linkset_to_mcdi_cap(cmd->link_modes.advertising) |
632 1 << MC_CMD_PHY_CAP_AN_LBN);
633 } else if (cmd->base.duplex) {
634 switch (cmd->base.speed) {
635 case 10: caps = 1 << MC_CMD_PHY_CAP_10FDX_LBN; break;
636 case 100: caps = 1 << MC_CMD_PHY_CAP_100FDX_LBN; break;
637 case 1000: caps = 1 << MC_CMD_PHY_CAP_1000FDX_LBN; break;
638 case 10000: caps = 1 << MC_CMD_PHY_CAP_10000FDX_LBN; break;
639 case 40000: caps = 1 << MC_CMD_PHY_CAP_40000FDX_LBN; break;
640 case 100000: caps = 1 << MC_CMD_PHY_CAP_100000FDX_LBN; break;
641 case 25000: caps = 1 << MC_CMD_PHY_CAP_25000FDX_LBN; break;
642 case 50000: caps = 1 << MC_CMD_PHY_CAP_50000FDX_LBN; break;
643 default: return -EINVAL;
644 }
645 } else {
646 switch (cmd->base.speed) {
647 case 10: caps = 1 << MC_CMD_PHY_CAP_10HDX_LBN; break;
648 case 100: caps = 1 << MC_CMD_PHY_CAP_100HDX_LBN; break;
649 case 1000: caps = 1 << MC_CMD_PHY_CAP_1000HDX_LBN; break;
650 default: return -EINVAL;
651 }
652 }
653
654 caps |= ethtool_fec_caps_to_mcdi(efx->fec_config);
655
656 rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
657 efx->loopback_mode, 0);
658 if (rc)
659 return rc;
660
661 if (cmd->base.autoneg) {
662 efx_link_set_advertising(efx, cmd->link_modes.advertising);
663 phy_cfg->forced_cap = 0;
664 } else {
665 efx_link_clear_advertising(efx);
666 phy_cfg->forced_cap = caps;
667 }
668 return 0;
669}
670
671static int efx_mcdi_phy_get_fecparam(struct efx_nic *efx,
672 struct ethtool_fecparam *fec)
673{
674 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_V2_LEN);
675 u32 caps, active, speed; /* MCDI format */
676 bool is_25g = false;
677 size_t outlen;
678 int rc;
679
680 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
681 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
682 outbuf, sizeof(outbuf), &outlen);
683 if (rc)
684 return rc;
685 if (outlen < MC_CMD_GET_LINK_OUT_V2_LEN)
686 return -EOPNOTSUPP;
687
688 /* behaviour for 25G/50G links depends on 25G BASER bit */
689 speed = MCDI_DWORD(outbuf, GET_LINK_OUT_V2_LINK_SPEED);
690 is_25g = speed == 25000 || speed == 50000;
691
692 caps = MCDI_DWORD(outbuf, GET_LINK_OUT_V2_CAP);
693 fec->fec = mcdi_fec_caps_to_ethtool(caps, is_25g);
694 /* BASER is never supported on 100G */
695 if (speed == 100000)
696 fec->fec &= ~ETHTOOL_FEC_BASER;
697
698 active = MCDI_DWORD(outbuf, GET_LINK_OUT_V2_FEC_TYPE);
699 switch (active) {
700 case MC_CMD_FEC_NONE:
701 fec->active_fec = ETHTOOL_FEC_OFF;
702 break;
703 case MC_CMD_FEC_BASER:
704 fec->active_fec = ETHTOOL_FEC_BASER;
705 break;
706 case MC_CMD_FEC_RS:
707 fec->active_fec = ETHTOOL_FEC_RS;
708 break;
709 default:
710 netif_warn(efx, hw, efx->net_dev,
711 "Firmware reports unrecognised FEC_TYPE %u\n",
712 active);
713 /* We don't know what firmware has picked. AUTO is as good a
714 * "can't happen" value as any other.
715 */
716 fec->active_fec = ETHTOOL_FEC_AUTO;
717 break;
718 }
719
720 return 0;
721}
722
723static int efx_mcdi_phy_set_fecparam(struct efx_nic *efx,
724 const struct ethtool_fecparam *fec)
725{
726 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
727 u32 caps;
728 int rc;
729
730 /* Work out what efx_mcdi_phy_set_link_ksettings() would produce from
731 * saved advertising bits
732 */
733 if (test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, efx->link_advertising))
734 caps = (ethtool_linkset_to_mcdi_cap(efx->link_advertising) |
735 1 << MC_CMD_PHY_CAP_AN_LBN);
736 else
737 caps = phy_cfg->forced_cap;
738
739 caps |= ethtool_fec_caps_to_mcdi(fec->fec);
740 rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
741 efx->loopback_mode, 0);
742 if (rc)
743 return rc;
744
745 /* Record the new FEC setting for subsequent set_link calls */
746 efx->fec_config = fec->fec;
747 return 0;
748}
749
750static int efx_mcdi_phy_test_alive(struct efx_nic *efx)
751{
752 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_STATE_OUT_LEN);
753 size_t outlen;
754 int rc;
755
756 BUILD_BUG_ON(MC_CMD_GET_PHY_STATE_IN_LEN != 0);
757
758 rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_STATE, NULL, 0,
759 outbuf, sizeof(outbuf), &outlen);
760 if (rc)
761 return rc;
762
763 if (outlen < MC_CMD_GET_PHY_STATE_OUT_LEN)
764 return -EIO;
765 if (MCDI_DWORD(outbuf, GET_PHY_STATE_OUT_STATE) != MC_CMD_PHY_STATE_OK)
766 return -EINVAL;
767
768 return 0;
769}
770
771static const char *const mcdi_sft9001_cable_diag_names[] = {
772 "cable.pairA.length",
773 "cable.pairB.length",
774 "cable.pairC.length",
775 "cable.pairD.length",
776 "cable.pairA.status",
777 "cable.pairB.status",
778 "cable.pairC.status",
779 "cable.pairD.status",
780};
781
782static int efx_mcdi_bist(struct efx_nic *efx, unsigned int bist_mode,
783 int *results)
784{
785 unsigned int retry, i, count = 0;
786 size_t outlen;
787 u32 status;
788 MCDI_DECLARE_BUF(inbuf, MC_CMD_START_BIST_IN_LEN);
789 MCDI_DECLARE_BUF(outbuf, MC_CMD_POLL_BIST_OUT_SFT9001_LEN);
790 u8 *ptr;
791 int rc;
792
793 BUILD_BUG_ON(MC_CMD_START_BIST_OUT_LEN != 0);
794 MCDI_SET_DWORD(inbuf, START_BIST_IN_TYPE, bist_mode);
795 rc = efx_mcdi_rpc(efx, MC_CMD_START_BIST,
796 inbuf, MC_CMD_START_BIST_IN_LEN, NULL, 0, NULL);
797 if (rc)
798 goto out;
799
800 /* Wait up to 10s for BIST to finish */
801 for (retry = 0; retry < 100; ++retry) {
802 BUILD_BUG_ON(MC_CMD_POLL_BIST_IN_LEN != 0);
803 rc = efx_mcdi_rpc(efx, MC_CMD_POLL_BIST, NULL, 0,
804 outbuf, sizeof(outbuf), &outlen);
805 if (rc)
806 goto out;
807
808 status = MCDI_DWORD(outbuf, POLL_BIST_OUT_RESULT);
809 if (status != MC_CMD_POLL_BIST_RUNNING)
810 goto finished;
811
812 msleep(100);
813 }
814
815 rc = -ETIMEDOUT;
816 goto out;
817
818finished:
819 results[count++] = (status == MC_CMD_POLL_BIST_PASSED) ? 1 : -1;
820
821 /* SFT9001 specific cable diagnostics output */
822 if (efx->phy_type == PHY_TYPE_SFT9001B &&
823 (bist_mode == MC_CMD_PHY_BIST_CABLE_SHORT ||
824 bist_mode == MC_CMD_PHY_BIST_CABLE_LONG)) {
825 ptr = MCDI_PTR(outbuf, POLL_BIST_OUT_SFT9001_CABLE_LENGTH_A);
826 if (status == MC_CMD_POLL_BIST_PASSED &&
827 outlen >= MC_CMD_POLL_BIST_OUT_SFT9001_LEN) {
828 for (i = 0; i < 8; i++) {
829 results[count + i] =
830 EFX_DWORD_FIELD(((efx_dword_t *)ptr)[i],
831 EFX_DWORD_0);
832 }
833 }
834 count += 8;
835 }
836 rc = count;
837
838out:
839 return rc;
840}
841
842static int efx_mcdi_phy_run_tests(struct efx_nic *efx, int *results,
843 unsigned flags)
844{
845 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
846 u32 mode;
847 int rc;
848
849 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) {
850 rc = efx_mcdi_bist(efx, MC_CMD_PHY_BIST, results);
851 if (rc < 0)
852 return rc;
853
854 results += rc;
855 }
856
857 /* If we support both LONG and SHORT, then run each in response to
858 * break or not. Otherwise, run the one we support */
859 mode = 0;
860 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN)) {
861 if ((flags & ETH_TEST_FL_OFFLINE) &&
862 (phy_cfg->flags &
863 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN)))
864 mode = MC_CMD_PHY_BIST_CABLE_LONG;
865 else
866 mode = MC_CMD_PHY_BIST_CABLE_SHORT;
867 } else if (phy_cfg->flags &
868 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))
869 mode = MC_CMD_PHY_BIST_CABLE_LONG;
870
871 if (mode != 0) {
872 rc = efx_mcdi_bist(efx, mode, results);
873 if (rc < 0)
874 return rc;
875 results += rc;
876 }
877
878 return 0;
879}
880
881static const char *efx_mcdi_phy_test_name(struct efx_nic *efx,
882 unsigned int index)
883{
884 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
885
886 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) {
887 if (index == 0)
888 return "bist";
889 --index;
890 }
891
892 if (phy_cfg->flags & ((1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN) |
893 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))) {
894 if (index == 0)
895 return "cable";
896 --index;
897
898 if (efx->phy_type == PHY_TYPE_SFT9001B) {
899 if (index < ARRAY_SIZE(mcdi_sft9001_cable_diag_names))
900 return mcdi_sft9001_cable_diag_names[index];
901 index -= ARRAY_SIZE(mcdi_sft9001_cable_diag_names);
902 }
903 }
904
905 return NULL;
906}
907
908#define SFP_PAGE_SIZE 128
909#define SFF_DIAG_TYPE_OFFSET 92
910#define SFF_DIAG_ADDR_CHANGE BIT(2)
911#define SFF_8079_NUM_PAGES 2
912#define SFF_8472_NUM_PAGES 4
913#define SFF_8436_NUM_PAGES 5
914#define SFF_DMT_LEVEL_OFFSET 94
915
916/** efx_mcdi_phy_get_module_eeprom_page() - Get a single page of module eeprom
917 * @efx: NIC context
918 * @page: EEPROM page number
919 * @data: Destination data pointer
920 * @offset: Offset in page to copy from in to data
921 * @space: Space available in data
922 *
923 * Return:
924 * >=0 - amount of data copied
925 * <0 - error
926 */
927static int efx_mcdi_phy_get_module_eeprom_page(struct efx_nic *efx,
928 unsigned int page,
929 u8 *data, ssize_t offset,
930 ssize_t space)
931{
932 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_MEDIA_INFO_OUT_LENMAX);
933 MCDI_DECLARE_BUF(inbuf, MC_CMD_GET_PHY_MEDIA_INFO_IN_LEN);
934 size_t outlen;
935 unsigned int payload_len;
936 unsigned int to_copy;
937 int rc;
938
939 if (offset > SFP_PAGE_SIZE)
940 return -EINVAL;
941
942 to_copy = min(space, SFP_PAGE_SIZE - offset);
943
944 MCDI_SET_DWORD(inbuf, GET_PHY_MEDIA_INFO_IN_PAGE, page);
945 rc = efx_mcdi_rpc_quiet(efx, MC_CMD_GET_PHY_MEDIA_INFO,
946 inbuf, sizeof(inbuf),
947 outbuf, sizeof(outbuf),
948 &outlen);
949
950 if (rc)
951 return rc;
952
953 if (outlen < (MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_OFST +
954 SFP_PAGE_SIZE))
955 return -EIO;
956
957 payload_len = MCDI_DWORD(outbuf, GET_PHY_MEDIA_INFO_OUT_DATALEN);
958 if (payload_len != SFP_PAGE_SIZE)
959 return -EIO;
960
961 memcpy(data, MCDI_PTR(outbuf, GET_PHY_MEDIA_INFO_OUT_DATA) + offset,
962 to_copy);
963
964 return to_copy;
965}
966
967static int efx_mcdi_phy_get_module_eeprom_byte(struct efx_nic *efx,
968 unsigned int page,
969 u8 byte)
970{
971 int rc;
972 u8 data;
973
974 rc = efx_mcdi_phy_get_module_eeprom_page(efx, page, &data, byte, 1);
975 if (rc == 1)
976 return data;
977
978 return rc;
979}
980
981static int efx_mcdi_phy_diag_type(struct efx_nic *efx)
982{
983 /* Page zero of the EEPROM includes the diagnostic type at byte 92. */
984 return efx_mcdi_phy_get_module_eeprom_byte(efx, 0,
985 SFF_DIAG_TYPE_OFFSET);
986}
987
988static int efx_mcdi_phy_sff_8472_level(struct efx_nic *efx)
989{
990 /* Page zero of the EEPROM includes the DMT level at byte 94. */
991 return efx_mcdi_phy_get_module_eeprom_byte(efx, 0,
992 SFF_DMT_LEVEL_OFFSET);
993}
994
995static u32 efx_mcdi_phy_module_type(struct efx_nic *efx)
996{
997 struct efx_mcdi_phy_data *phy_data = efx->phy_data;
998
999 if (phy_data->media != MC_CMD_MEDIA_QSFP_PLUS)
1000 return phy_data->media;
1001
1002 /* A QSFP+ NIC may actually have an SFP+ module attached.
1003 * The ID is page 0, byte 0.
1004 */
1005 switch (efx_mcdi_phy_get_module_eeprom_byte(efx, 0, 0)) {
1006 case 0x3:
1007 return MC_CMD_MEDIA_SFP_PLUS;
1008 case 0xc:
1009 case 0xd:
1010 return MC_CMD_MEDIA_QSFP_PLUS;
1011 default:
1012 return 0;
1013 }
1014}
1015
1016static int efx_mcdi_phy_get_module_eeprom(struct efx_nic *efx,
1017 struct ethtool_eeprom *ee, u8 *data)
1018{
1019 int rc;
1020 ssize_t space_remaining = ee->len;
1021 unsigned int page_off;
1022 bool ignore_missing;
1023 int num_pages;
1024 int page;
1025
1026 switch (efx_mcdi_phy_module_type(efx)) {
1027 case MC_CMD_MEDIA_SFP_PLUS:
1028 num_pages = efx_mcdi_phy_sff_8472_level(efx) > 0 ?
1029 SFF_8472_NUM_PAGES : SFF_8079_NUM_PAGES;
1030 page = 0;
1031 ignore_missing = false;
1032 break;
1033 case MC_CMD_MEDIA_QSFP_PLUS:
1034 num_pages = SFF_8436_NUM_PAGES;
1035 page = -1; /* We obtain the lower page by asking for -1. */
1036 ignore_missing = true; /* Ignore missing pages after page 0. */
1037 break;
1038 default:
1039 return -EOPNOTSUPP;
1040 }
1041
1042 page_off = ee->offset % SFP_PAGE_SIZE;
1043 page += ee->offset / SFP_PAGE_SIZE;
1044
1045 while (space_remaining && (page < num_pages)) {
1046 rc = efx_mcdi_phy_get_module_eeprom_page(efx, page,
1047 data, page_off,
1048 space_remaining);
1049
1050 if (rc > 0) {
1051 space_remaining -= rc;
1052 data += rc;
1053 page_off = 0;
1054 page++;
1055 } else if (rc == 0) {
1056 space_remaining = 0;
1057 } else if (ignore_missing && (page > 0)) {
1058 int intended_size = SFP_PAGE_SIZE - page_off;
1059
1060 space_remaining -= intended_size;
1061 if (space_remaining < 0) {
1062 space_remaining = 0;
1063 } else {
1064 memset(data, 0, intended_size);
1065 data += intended_size;
1066 page_off = 0;
1067 page++;
1068 rc = 0;
1069 }
1070 } else {
1071 return rc;
1072 }
1073 }
1074
1075 return 0;
1076}
1077
1078static int efx_mcdi_phy_get_module_info(struct efx_nic *efx,
1079 struct ethtool_modinfo *modinfo)
1080{
1081 int sff_8472_level;
1082 int diag_type;
1083
1084 switch (efx_mcdi_phy_module_type(efx)) {
1085 case MC_CMD_MEDIA_SFP_PLUS:
1086 sff_8472_level = efx_mcdi_phy_sff_8472_level(efx);
1087
1088 /* If we can't read the diagnostics level we have none. */
1089 if (sff_8472_level < 0)
1090 return -EOPNOTSUPP;
1091
1092 /* Check if this module requires the (unsupported) address
1093 * change operation.
1094 */
1095 diag_type = efx_mcdi_phy_diag_type(efx);
1096
1097 if ((sff_8472_level == 0) ||
1098 (diag_type & SFF_DIAG_ADDR_CHANGE)) {
1099 modinfo->type = ETH_MODULE_SFF_8079;
1100 modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN;
1101 } else {
1102 modinfo->type = ETH_MODULE_SFF_8472;
1103 modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN;
1104 }
1105 break;
1106
1107 case MC_CMD_MEDIA_QSFP_PLUS:
1108 modinfo->type = ETH_MODULE_SFF_8436;
1109 modinfo->eeprom_len = ETH_MODULE_SFF_8436_LEN;
1110 break;
1111
1112 default:
1113 return -EOPNOTSUPP;
1114 }
1115
1116 return 0;
1117}
1118
1119static const struct efx_phy_operations efx_mcdi_phy_ops = {
1120 .probe = efx_mcdi_phy_probe,
1121 .init = efx_port_dummy_op_int,
1122 .reconfigure = efx_mcdi_port_reconfigure,
1123 .poll = efx_mcdi_phy_poll,
1124 .fini = efx_port_dummy_op_void,
1125 .remove = efx_mcdi_phy_remove,
1126 .get_link_ksettings = efx_mcdi_phy_get_link_ksettings,
1127 .set_link_ksettings = efx_mcdi_phy_set_link_ksettings,
1128 .get_fecparam = efx_mcdi_phy_get_fecparam,
1129 .set_fecparam = efx_mcdi_phy_set_fecparam,
1130 .test_alive = efx_mcdi_phy_test_alive,
1131 .run_tests = efx_mcdi_phy_run_tests,
1132 .test_name = efx_mcdi_phy_test_name,
1133 .get_module_eeprom = efx_mcdi_phy_get_module_eeprom,
1134 .get_module_info = efx_mcdi_phy_get_module_info,
1135};
1136
1137u32 efx_mcdi_phy_get_caps(struct efx_nic *efx)
1138{
1139 struct efx_mcdi_phy_data *phy_data = efx->phy_data;
1140
1141 return phy_data->supported_cap;
1142}
1143
1144static unsigned int efx_mcdi_event_link_speed[] = {
1145 [MCDI_EVENT_LINKCHANGE_SPEED_100M] = 100,
1146 [MCDI_EVENT_LINKCHANGE_SPEED_1G] = 1000,
1147 [MCDI_EVENT_LINKCHANGE_SPEED_10G] = 10000,
1148 [MCDI_EVENT_LINKCHANGE_SPEED_40G] = 40000,
1149 [MCDI_EVENT_LINKCHANGE_SPEED_25G] = 25000,
1150 [MCDI_EVENT_LINKCHANGE_SPEED_50G] = 50000,
1151 [MCDI_EVENT_LINKCHANGE_SPEED_100G] = 100000,
1152};
1153
1154void efx_mcdi_process_link_change(struct efx_nic *efx, efx_qword_t *ev)
1155{
1156 u32 flags, fcntl, speed, lpa;
1157
1158 speed = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_SPEED);
1159 EFX_WARN_ON_PARANOID(speed >= ARRAY_SIZE(efx_mcdi_event_link_speed));
1160 speed = efx_mcdi_event_link_speed[speed];
1161
1162 flags = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_LINK_FLAGS);
1163 fcntl = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_FCNTL);
1164 lpa = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_LP_CAP);
1165
1166 /* efx->link_state is only modified by efx_mcdi_phy_get_link(),
1167 * which is only run after flushing the event queues. Therefore, it
1168 * is safe to modify the link state outside of the mac_lock here.
1169 */
1170 efx_mcdi_phy_decode_link(efx, &efx->link_state, speed, flags, fcntl);
1171
1172 efx_mcdi_phy_check_fcntl(efx, lpa);
1173
1174 efx_link_status_changed(efx);
1175}
1176
1177int efx_mcdi_set_mac(struct efx_nic *efx)
1178{
1179 u32 fcntl;
1180 MCDI_DECLARE_BUF(cmdbytes, MC_CMD_SET_MAC_IN_LEN);
1181
1182 BUILD_BUG_ON(MC_CMD_SET_MAC_OUT_LEN != 0);
1183
1184 /* This has no effect on EF10 */
1185 ether_addr_copy(MCDI_PTR(cmdbytes, SET_MAC_IN_ADDR),
1186 efx->net_dev->dev_addr);
1187
1188 MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_MTU,
1189 EFX_MAX_FRAME_LEN(efx->net_dev->mtu));
1190 MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_DRAIN, 0);
1191
1192 /* Set simple MAC filter for Siena */
1193 MCDI_POPULATE_DWORD_1(cmdbytes, SET_MAC_IN_REJECT,
1194 SET_MAC_IN_REJECT_UNCST, efx->unicast_filter);
1195
1196 MCDI_POPULATE_DWORD_1(cmdbytes, SET_MAC_IN_FLAGS,
1197 SET_MAC_IN_FLAG_INCLUDE_FCS,
1198 !!(efx->net_dev->features & NETIF_F_RXFCS));
1199
1200 switch (efx->wanted_fc) {
1201 case EFX_FC_RX | EFX_FC_TX:
1202 fcntl = MC_CMD_FCNTL_BIDIR;
1203 break;
1204 case EFX_FC_RX:
1205 fcntl = MC_CMD_FCNTL_RESPOND;
1206 break;
1207 default:
1208 fcntl = MC_CMD_FCNTL_OFF;
1209 break;
1210 }
1211 if (efx->wanted_fc & EFX_FC_AUTO)
1212 fcntl = MC_CMD_FCNTL_AUTO;
1213 if (efx->fc_disable)
1214 fcntl = MC_CMD_FCNTL_OFF;
1215
1216 MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_FCNTL, fcntl);
1217
1218 return efx_mcdi_rpc(efx, MC_CMD_SET_MAC, cmdbytes, sizeof(cmdbytes),
1219 NULL, 0, NULL);
1220}
1221
1222bool efx_mcdi_mac_check_fault(struct efx_nic *efx)
1223{
1224 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
1225 size_t outlength;
1226 int rc;
1227
1228 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
1229
1230 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
1231 outbuf, sizeof(outbuf), &outlength);
1232 if (rc)
1233 return true;
1234
1235 return MCDI_DWORD(outbuf, GET_LINK_OUT_MAC_FAULT) != 0;
1236}
1237
1238enum efx_stats_action {
1239 EFX_STATS_ENABLE,
1240 EFX_STATS_DISABLE,
1241 EFX_STATS_PULL,
1242};
1243
1244static int efx_mcdi_mac_stats(struct efx_nic *efx,
1245 enum efx_stats_action action, int clear)
1246{
1247 MCDI_DECLARE_BUF(inbuf, MC_CMD_MAC_STATS_IN_LEN);
1248 int rc;
1249 int change = action == EFX_STATS_PULL ? 0 : 1;
1250 int enable = action == EFX_STATS_ENABLE ? 1 : 0;
1251 int period = action == EFX_STATS_ENABLE ? 1000 : 0;
1252 dma_addr_t dma_addr = efx->stats_buffer.dma_addr;
1253 u32 dma_len = action != EFX_STATS_DISABLE ?
1254 efx->num_mac_stats * sizeof(u64) : 0;
1255
1256 BUILD_BUG_ON(MC_CMD_MAC_STATS_OUT_DMA_LEN != 0);
1257
1258 MCDI_SET_QWORD(inbuf, MAC_STATS_IN_DMA_ADDR, dma_addr);
1259 MCDI_POPULATE_DWORD_7(inbuf, MAC_STATS_IN_CMD,
1260 MAC_STATS_IN_DMA, !!enable,
1261 MAC_STATS_IN_CLEAR, clear,
1262 MAC_STATS_IN_PERIODIC_CHANGE, change,
1263 MAC_STATS_IN_PERIODIC_ENABLE, enable,
1264 MAC_STATS_IN_PERIODIC_CLEAR, 0,
1265 MAC_STATS_IN_PERIODIC_NOEVENT, 1,
1266 MAC_STATS_IN_PERIOD_MS, period);
1267 MCDI_SET_DWORD(inbuf, MAC_STATS_IN_DMA_LEN, dma_len);
1268
1269 if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0) {
1270 struct efx_ef10_nic_data *nic_data = efx->nic_data;
1271
1272 MCDI_SET_DWORD(inbuf, MAC_STATS_IN_PORT_ID, nic_data->vport_id);
1273 }
1274
1275 rc = efx_mcdi_rpc_quiet(efx, MC_CMD_MAC_STATS, inbuf, sizeof(inbuf),
1276 NULL, 0, NULL);
1277 /* Expect ENOENT if DMA queues have not been set up */
1278 if (rc && (rc != -ENOENT || atomic_read(&efx->active_queues)))
1279 efx_mcdi_display_error(efx, MC_CMD_MAC_STATS, sizeof(inbuf),
1280 NULL, 0, rc);
1281 return rc;
1282}
1283
1284void efx_mcdi_mac_start_stats(struct efx_nic *efx)
1285{
1286 __le64 *dma_stats = efx->stats_buffer.addr;
1287
1288 dma_stats[efx->num_mac_stats - 1] = EFX_MC_STATS_GENERATION_INVALID;
1289
1290 efx_mcdi_mac_stats(efx, EFX_STATS_ENABLE, 0);
1291}
1292
1293void efx_mcdi_mac_stop_stats(struct efx_nic *efx)
1294{
1295 efx_mcdi_mac_stats(efx, EFX_STATS_DISABLE, 0);
1296}
1297
1298#define EFX_MAC_STATS_WAIT_US 100
1299#define EFX_MAC_STATS_WAIT_ATTEMPTS 10
1300
1301void efx_mcdi_mac_pull_stats(struct efx_nic *efx)
1302{
1303 __le64 *dma_stats = efx->stats_buffer.addr;
1304 int attempts = EFX_MAC_STATS_WAIT_ATTEMPTS;
1305
1306 dma_stats[efx->num_mac_stats - 1] = EFX_MC_STATS_GENERATION_INVALID;
1307 efx_mcdi_mac_stats(efx, EFX_STATS_PULL, 0);
1308
1309 while (dma_stats[efx->num_mac_stats - 1] ==
1310 EFX_MC_STATS_GENERATION_INVALID &&
1311 attempts-- != 0)
1312 udelay(EFX_MAC_STATS_WAIT_US);
1313}
1314
1315int efx_mcdi_port_probe(struct efx_nic *efx)
1316{
1317 int rc;
1318
1319 /* Hook in PHY operations table */
1320 efx->phy_op = &efx_mcdi_phy_ops;
1321
1322 /* Set up MDIO structure for PHY */
1323 efx->mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
1324 efx->mdio.mdio_read = efx_mcdi_mdio_read;
1325 efx->mdio.mdio_write = efx_mcdi_mdio_write;
1326
1327 /* Fill out MDIO structure, loopback modes, and initial link state */
1328 rc = efx->phy_op->probe(efx);
1329 if (rc != 0)
1330 return rc;
1331
1332 /* Allocate buffer for stats */
1333 rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer,
1334 efx->num_mac_stats * sizeof(u64), GFP_KERNEL);
1335 if (rc)
1336 return rc;
1337 netif_dbg(efx, probe, efx->net_dev,
1338 "stats buffer at %llx (virt %p phys %llx)\n",
1339 (u64)efx->stats_buffer.dma_addr,
1340 efx->stats_buffer.addr,
1341 (u64)virt_to_phys(efx->stats_buffer.addr));
1342
1343 efx_mcdi_mac_stats(efx, EFX_STATS_DISABLE, 1);
1344
1345 return 0;
1346}
1347
1348void efx_mcdi_port_remove(struct efx_nic *efx)
1349{
1350 efx->phy_op->remove(efx);
1351 efx_nic_free_buffer(efx, &efx->stats_buffer);
1352}
1353
1354/* Get physical port number (EF10 only; on Siena it is same as PF number) */
1355int efx_mcdi_port_get_number(struct efx_nic *efx)
1356{
1357 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PORT_ASSIGNMENT_OUT_LEN);
1358 int rc;
1359
1360 rc = efx_mcdi_rpc(efx, MC_CMD_GET_PORT_ASSIGNMENT, NULL, 0,
1361 outbuf, sizeof(outbuf), NULL);
1362 if (rc)
1363 return rc;
1364
1365 return MCDI_DWORD(outbuf, GET_PORT_ASSIGNMENT_OUT_PORT);
1366}