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bnxt_en: Implement .adjtime() for PTP RTC mode

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The adjusted time is set in the PHC in RTC mode.  We also need to
update the snapshots ptp->current_time and ptp->old_time when the
time is adjusted.

Cc: Richard Cochran <richardcochran@gmail.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Signed-off-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavan Chebbi 2022-01-25 23:40:12 -05:00 committed by David S. Miller
parent 24ac1ecd52
commit e7b0afb690
2 changed files with 37 additions and 0 deletions
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36
drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
View File

@ -148,11 +148,47 @@ static int bnxt_ptp_gettimex(struct ptp_clock_info *ptp_info,
return 0;
}
/* Caller holds ptp_lock */
void bnxt_ptp_update_current_time(struct bnxt *bp)
{
struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
bnxt_refclk_read(ptp->bp, NULL, &ptp->current_time);
WRITE_ONCE(ptp->old_time, ptp->current_time);
}
static int bnxt_ptp_adjphc(struct bnxt_ptp_cfg *ptp, s64 delta)
{
struct hwrm_port_mac_cfg_input *req;
int rc;
rc = hwrm_req_init(ptp->bp, req, HWRM_PORT_MAC_CFG);
if (rc)
return rc;
req->enables = cpu_to_le32(PORT_MAC_CFG_REQ_ENABLES_PTP_ADJ_PHASE);
req->ptp_adj_phase = cpu_to_le64(delta);
rc = hwrm_req_send(ptp->bp, req);
if (rc) {
netdev_err(ptp->bp->dev, "ptp adjphc failed. rc = %x\n", rc);
} else {
spin_lock_bh(&ptp->ptp_lock);
bnxt_ptp_update_current_time(ptp->bp);
spin_unlock_bh(&ptp->ptp_lock);
}
return rc;
}
static int bnxt_ptp_adjtime(struct ptp_clock_info *ptp_info, s64 delta)
{
struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
ptp_info);
if (ptp->bp->fw_cap & BNXT_FW_CAP_PTP_RTC)
return bnxt_ptp_adjphc(ptp, delta);
spin_lock_bh(&ptp->ptp_lock);
timecounter_adjtime(&ptp->tc, delta);
spin_unlock_bh(&ptp->ptp_lock);

1
drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h
View File

@ -131,6 +131,7 @@ do { \
#endif
int bnxt_ptp_parse(struct sk_buff *skb, u16 *seq_id, u16 *hdr_off);
void bnxt_ptp_update_current_time(struct bnxt *bp);
void bnxt_ptp_pps_event(struct bnxt *bp, u32 data1, u32 data2);
void bnxt_ptp_reapply_pps(struct bnxt *bp);
int bnxt_hwtstamp_set(struct net_device *dev, struct ifreq *ifr);