[PATCH net-next 01/12] bnxt_en: Add a timeout parameter to bnxt_hwrm_port_ts_query()

[Michael Chan <michael.chan@broadcom.com>]

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The caller can pass this new timeout parameter to the function to
specify the firmware timeout value when requesting the TX timestamp
from the firmware.  This will allow the caller to precisely control
the timeout and will be used in the next patch.  In this patch, the
parameter is 0 which means to use the current default value.

Cc: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Cc: Richard Cochran <richardcochran@gmail.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c | 16 ++++++++++++----
 drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h |  1 +
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
index cc07660330f5..dbfd1b36774c 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
@@ -109,7 +109,8 @@ static void bnxt_ptp_get_current_time(struct bnxt *bp)
 	spin_unlock_bh(&ptp->ptp_lock);
 }
 
-static int bnxt_hwrm_port_ts_query(struct bnxt *bp, u32 flags, u64 *ts)
+static int bnxt_hwrm_port_ts_query(struct bnxt *bp, u32 flags, u64 *ts,
+				   u32 txts_tmo)
 {
 	struct hwrm_port_ts_query_output *resp;
 	struct hwrm_port_ts_query_input *req;
@@ -122,10 +123,15 @@ static int bnxt_hwrm_port_ts_query(struct bnxt *bp, u32 flags, u64 *ts)
 	req->flags = cpu_to_le32(flags);
 	if ((flags & PORT_TS_QUERY_REQ_FLAGS_PATH) ==
 	    PORT_TS_QUERY_REQ_FLAGS_PATH_TX) {
+		u32 tmo_us = txts_tmo * 1000;
+
 		req->enables = cpu_to_le16(BNXT_PTP_QTS_TX_ENABLES);
 		req->ptp_seq_id = cpu_to_le32(bp->ptp_cfg->tx_seqid);
 		req->ptp_hdr_offset = cpu_to_le16(bp->ptp_cfg->tx_hdr_off);
-		req->ts_req_timeout = cpu_to_le16(BNXT_PTP_QTS_TIMEOUT);
+		if (!tmo_us)
+			tmo_us = BNXT_PTP_QTS_TIMEOUT;
+		tmo_us = min(tmo_us, BNXT_PTP_QTS_MAX_TMO_US);
+		req->ts_req_timeout = cpu_to_le16(txts_tmo);
 	}
 	resp = hwrm_req_hold(bp, req);
 
@@ -675,7 +681,8 @@ static void bnxt_stamp_tx_skb(struct bnxt *bp, struct sk_buff *skb)
 	u64 ts = 0, ns = 0;
 	int rc;
 
-	rc = bnxt_hwrm_port_ts_query(bp, PORT_TS_QUERY_REQ_FLAGS_PATH_TX, &ts);
+	rc = bnxt_hwrm_port_ts_query(bp, PORT_TS_QUERY_REQ_FLAGS_PATH_TX, &ts,
+				     0);
 	if (!rc) {
 		memset(&timestamp, 0, sizeof(timestamp));
 		spin_lock_bh(&ptp->ptp_lock);
@@ -891,7 +898,8 @@ int bnxt_ptp_init_rtc(struct bnxt *bp, bool phc_cfg)
 		if (rc)
 			return rc;
 	} else {
-		rc = bnxt_hwrm_port_ts_query(bp, PORT_TS_QUERY_REQ_FLAGS_CURRENT_TIME, &ns);
+		rc = bnxt_hwrm_port_ts_query(bp, PORT_TS_QUERY_REQ_FLAGS_CURRENT_TIME,
+					     &ns, 0);
 		if (rc)
 			return rc;
 	}
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h
index fce8dc39a7d0..04886d5f22ad 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h
@@ -23,6 +23,7 @@
 #define BNXT_HI_TIMER_MASK	0xffff00000000UL
 
 #define BNXT_PTP_QTS_TIMEOUT	1000
+#define BNXT_PTP_QTS_MAX_TMO_US	65535
 #define BNXT_PTP_QTS_TX_ENABLES	(PORT_TS_QUERY_REQ_ENABLES_PTP_SEQ_ID |	\
 				 PORT_TS_QUERY_REQ_ENABLES_TS_REQ_TIMEOUT | \
 				 PORT_TS_QUERY_REQ_ENABLES_PTP_HDR_OFFSET)
-- 
2.30.1


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