bnxt_en: Implement .adjtime() for PTP RTC mode

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>

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
index 066e5a9..a0b321a 100644 (file)
--- 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_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);

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h
index ca850c5..373baf4 100644 (file)
--- 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);