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// SPDX-License-Identifier: GPL-2.0
/* Marvell RVU Ethernet driver
*
* Copyright (C) 2020 Marvell.
*
*/
#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;
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;
return otx2_sync_mbox_msg(&ptp->nic->mbox);
}
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);
struct otx2_nic *pfvf = ptp->nic;
mutex_lock(&pfvf->mbox.lock);
timecounter_adjtime(&ptp->time_counter, delta);
mutex_unlock(&pfvf->mbox.lock);
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);
struct otx2_nic *pfvf = ptp->nic;
u64 nsec;
mutex_lock(&pfvf->mbox.lock);
nsec = timecounter_read(&ptp->time_counter);
mutex_unlock(&pfvf->mbox.lock);
*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);
struct otx2_nic *pfvf = ptp->nic;
u64 nsec;
nsec = timespec64_to_ns(ts);
mutex_lock(&pfvf->mbox.lock);
timecounter_init(&ptp->time_counter, &ptp->cycle_counter, nsec);
mutex_unlock(&pfvf->mbox.lock);
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;
mutex_lock(&pfvf->mbox.lock);
/* check if PTP block is available */
req = otx2_mbox_alloc_msg_ptp_op(&pfvf->mbox);
if (!req) {
mutex_unlock(&pfvf->mbox.lock);
return -ENOMEM;
}
req->op = PTP_OP_GET_CLOCK;
err = otx2_sync_mbox_msg(&pfvf->mbox);
if (err) {
mutex_unlock(&pfvf->mbox.lock);
return err;
}
mutex_unlock(&pfvf->mbox.lock);
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_OR_NULL(ptp_ptr->ptp_clock)) {
err = ptp_ptr->ptp_clock ?
PTR_ERR(ptp_ptr->ptp_clock) : -ENODEV;
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;
}
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