From: Pavan Chebbi <pavan.chebbi@broadcom.com>
Date: Tue, 25 Jan 2022 23:40:12 -0500
Subject: bnxt_en: Implement .adjtime() for PTP RTC mode
Patch-mainline: v5.18-rc1
Git-commit: e7b0afb69083ff7199dec51e7b9b1646e799943b
References: jsc#PED-1495
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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c | 36 ++++++++++++++++++++++++++
drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h | 1
2 files changed, 37 insertions(+)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
@@ -148,11 +148,47 @@ static int bnxt_ptp_gettimex(struct ptp_
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);
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h
@@ -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);