diff options
| -rw-r--r-- | drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c | 32 | ||||
| -rw-r--r-- | drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h | 11 |
2 files changed, 37 insertions, 6 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c index 91e7e08fabb1..075ccd589845 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c @@ -112,6 +112,28 @@ static int bnxt_refclk_read(struct bnxt *bp, struct ptp_system_timestamp *sts, return rc; } +static int bnxt_refclk_read_low(struct bnxt *bp, struct ptp_system_timestamp *sts, + u32 *low) +{ + struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; + unsigned long flags; + + /* We have to serialize reg access and FW reset */ + read_seqlock_excl_irqsave(&ptp->ptp_lock, flags); + + if (test_bit(BNXT_STATE_IN_FW_RESET, &bp->state)) { + read_sequnlock_excl_irqrestore(&ptp->ptp_lock, flags); + return -EIO; + } + + ptp_read_system_prets(sts); + *low = readl(bp->bar0 + ptp->refclk_mapped_regs[0]); + ptp_read_system_postts(sts); + + read_sequnlock_excl_irqrestore(&ptp->ptp_lock, flags); + return 0; +} + static void bnxt_ptp_get_current_time(struct bnxt *bp) { struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; @@ -163,12 +185,14 @@ static int bnxt_ptp_gettimex(struct ptp_clock_info *ptp_info, struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg, ptp_info); u64 ns, cycles; + u32 low; int rc; - rc = bnxt_refclk_read(ptp->bp, sts, &cycles); + rc = bnxt_refclk_read_low(ptp->bp, sts, &low); if (rc) return rc; + cycles = bnxt_extend_cycles_32b_to_48b(ptp, low); ns = bnxt_timecounter_cyc2time(ptp, cycles); *ts = ns_to_timespec64(ns); @@ -801,15 +825,11 @@ void bnxt_get_tx_ts_p5(struct bnxt *bp, struct sk_buff *skb, u16 prod) int bnxt_get_rx_ts_p5(struct bnxt *bp, u64 *ts, u32 pkt_ts) { struct bnxt_ptp_cfg *ptp = bp->ptp_cfg; - u64 time; if (!ptp) return -ENODEV; - time = (u64)READ_ONCE(ptp->old_time) << BNXT_HI_TIMER_SHIFT; - *ts = (time & BNXT_HI_TIMER_MASK) | pkt_ts; - if (pkt_ts < (time & BNXT_LO_TIMER_MASK)) - *ts += BNXT_LO_TIMER_MASK + 1; + *ts = bnxt_extend_cycles_32b_to_48b(ptp, pkt_ts); return 0; } diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h index 4df4c2f373e0..c7851f8c971c 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h @@ -182,4 +182,15 @@ static inline u64 bnxt_timecounter_cyc2time(struct bnxt_ptp_cfg *ptp, u64 ts) return ns; } + +static inline u64 bnxt_extend_cycles_32b_to_48b(struct bnxt_ptp_cfg *ptp, u32 ts) +{ + u64 time, cycles; + + time = (u64)READ_ONCE(ptp->old_time) << BNXT_HI_TIMER_SHIFT; + cycles = (time & BNXT_HI_TIMER_MASK) | ts; + if (ts < (time & BNXT_LO_TIMER_MASK)) + cycles += BNXT_LO_TIMER_MASK + 1; + return cycles; +} #endif |