1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
|
// SPDX-License-Identifier: GPL-2.0
/* Marvell OcteonTx2 PTP support for ethernet driver
*
* Copyright (C) 2018 Marvell International Ltd.
*
* 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.
*/
#include "otx2_common.h"
#include "otx2_ptp.h"
static int otx2_ptp_adjfine(struct ptp_clock_info *ptp_info, long scaled_ppm)
{
struct otx2_ptp *ptp = container_of(ptp_info, struct otx2_ptp,
ptp_info);
struct ptp_req *req;
int err;
if (!ptp->nic)
return -ENODEV;
req = otx2_mbox_alloc_msg_ptp_op(&ptp->nic->mbox);
if (!req)
return -ENOMEM;
req->op = PTP_OP_ADJFINE;
req->scaled_ppm = scaled_ppm;
err = otx2_sync_mbox_msg(&ptp->nic->mbox);
if (err)
return err;
return 0;
}
static u64 ptp_cc_read(const struct cyclecounter *cc)
{
struct otx2_ptp *ptp = container_of(cc, struct otx2_ptp, cycle_counter);
struct ptp_req *req;
struct ptp_rsp *rsp;
int err;
if (!ptp->nic)
return 0;
req = otx2_mbox_alloc_msg_ptp_op(&ptp->nic->mbox);
if (!req)
return 0;
req->op = PTP_OP_GET_CLOCK;
err = otx2_sync_mbox_msg(&ptp->nic->mbox);
if (err)
return 0;
rsp = (struct ptp_rsp *)otx2_mbox_get_rsp(&ptp->nic->mbox.mbox, 0,
&req->hdr);
if (IS_ERR(rsp))
return 0;
return rsp->clk;
}
static int otx2_ptp_adjtime(struct ptp_clock_info *ptp_info, s64 delta)
{
struct otx2_ptp *ptp = container_of(ptp_info, struct otx2_ptp,
ptp_info);
otx2_mbox_lock(&ptp->nic->mbox);
timecounter_adjtime(&ptp->time_counter, delta);
otx2_mbox_unlock(&ptp->nic->mbox);
return 0;
}
static int otx2_ptp_gettime(struct ptp_clock_info *ptp_info,
struct timespec64 *ts)
{
struct otx2_ptp *ptp = container_of(ptp_info, struct otx2_ptp,
ptp_info);
u64 nsec;
otx2_mbox_lock(&ptp->nic->mbox);
nsec = timecounter_read(&ptp->time_counter);
otx2_mbox_unlock(&ptp->nic->mbox);
*ts = ns_to_timespec64(nsec);
return 0;
}
static int otx2_ptp_settime(struct ptp_clock_info *ptp_info,
const struct timespec64 *ts)
{
struct otx2_ptp *ptp = container_of(ptp_info, struct otx2_ptp,
ptp_info);
u64 nsec;
nsec = timespec64_to_ns(ts);
otx2_mbox_lock(&ptp->nic->mbox);
timecounter_init(&ptp->time_counter, &ptp->cycle_counter, nsec);
otx2_mbox_unlock(&ptp->nic->mbox);
return 0;
}
static int otx2_ptp_enable(struct ptp_clock_info *ptp_info,
struct ptp_clock_request *rq, int on)
{
return -EOPNOTSUPP;
}
int otx2_ptp_init(struct otx2_nic *pfvf)
{
struct otx2_ptp *ptp_ptr;
struct cyclecounter *cc;
struct ptp_req *req;
int err;
otx2_mbox_lock(&pfvf->mbox);
/* check if PTP block is available */
req = otx2_mbox_alloc_msg_ptp_op(&pfvf->mbox);
if (!req) {
otx2_mbox_unlock(&pfvf->mbox);
return -ENOMEM;
}
req->op = PTP_OP_GET_CLOCK;
err = otx2_sync_mbox_msg(&pfvf->mbox);
if (err) {
otx2_mbox_unlock(&pfvf->mbox);
return err;
}
otx2_mbox_unlock(&pfvf->mbox);
ptp_ptr = kzalloc(sizeof(*ptp_ptr), GFP_KERNEL);
if (!ptp_ptr) {
err = -ENOMEM;
goto error;
}
ptp_ptr->nic = pfvf;
cc = &ptp_ptr->cycle_counter;
cc->read = ptp_cc_read;
cc->mask = CYCLECOUNTER_MASK(64);
cc->mult = 1;
cc->shift = 0;
timecounter_init(&ptp_ptr->time_counter, &ptp_ptr->cycle_counter,
ktime_to_ns(ktime_get_real()));
ptp_ptr->ptp_info = (struct ptp_clock_info) {
.owner = THIS_MODULE,
.name = "OcteonTX2 PTP",
.max_adj = 1000000000ull,
.n_ext_ts = 0,
.n_pins = 0,
.pps = 0,
.adjfine = otx2_ptp_adjfine,
.adjtime = otx2_ptp_adjtime,
.gettime64 = otx2_ptp_gettime,
.settime64 = otx2_ptp_settime,
.enable = otx2_ptp_enable,
};
ptp_ptr->ptp_clock = ptp_clock_register(&ptp_ptr->ptp_info, pfvf->dev);
if (IS_ERR(ptp_ptr->ptp_clock)) {
err = PTR_ERR(ptp_ptr->ptp_clock);
kfree(ptp_ptr);
goto error;
}
pfvf->ptp = ptp_ptr;
error:
return err;
}
void otx2_ptp_destroy(struct otx2_nic *pfvf)
{
struct otx2_ptp *ptp = pfvf->ptp;
if (!ptp)
return;
ptp_clock_unregister(ptp->ptp_clock);
kfree(ptp);
pfvf->ptp = NULL;
}
int otx2_ptp_clock_index(struct otx2_nic *pfvf)
{
if (!pfvf->ptp)
return -ENODEV;
return ptp_clock_index(pfvf->ptp->ptp_clock);
}
int otx2_ptp_tstamp2time(struct otx2_nic *pfvf, u64 tstamp, u64 *tsns)
{
if (!pfvf->ptp)
return -ENODEV;
*tsns = timecounter_cyc2time(&pfvf->ptp->time_counter, tstamp);
return 0;
}
|
