Merge branch 'bnxt_en-ptp'

Michael Chan says:

====================
bnxt_en: PTP enhancements

This series adds two PTP enhancements.  This first one is to register
the PHC during probe time and keep it registered whether it is in
ifup or ifdown state.  It will get unregistered and possibly
reregistered if the firmware PTP capability changes after firmware
reset.  The second one is to add the 1PPS (one pulse per second)
feature to support input/output of the 1PPS signal.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -277,6 +277,8 @@ static const u16 bnxt_async_events_arr[] = {
 	ASYNC_EVENT_CMPL_EVENT_ID_DEBUG_NOTIFICATION,
 	ASYNC_EVENT_CMPL_EVENT_ID_RING_MONITOR_MSG,
 	ASYNC_EVENT_CMPL_EVENT_ID_ECHO_REQUEST,
+	ASYNC_EVENT_CMPL_EVENT_ID_PPS_TIMESTAMP,
+	ASYNC_EVENT_CMPL_EVENT_ID_ERROR_REPORT,
 };
 
 static struct workqueue_struct *bnxt_pf_wq;
@@ -2042,6 +2044,19 @@ static u16 bnxt_agg_ring_id_to_grp_idx(struct bnxt *bp, u16 ring_id)
 	return INVALID_HW_RING_ID;
 }
 
+static void bnxt_event_error_report(struct bnxt *bp, u32 data1, u32 data2)
+{
+	switch (BNXT_EVENT_ERROR_REPORT_TYPE(data1)) {
+	case ASYNC_EVENT_CMPL_ERROR_REPORT_BASE_EVENT_DATA1_ERROR_TYPE_INVALID_SIGNAL:
+		netdev_err(bp->dev, "1PPS: Received invalid signal on pin%lu from the external source. Please fix the signal and reconfigure the pin\n",
+			   BNXT_EVENT_INVALID_SIGNAL_DATA(data2));
+		break;
+	default:
+		netdev_err(bp->dev, "FW reported unknown error type\n");
+		break;
+	}
+}
+
 #define BNXT_GET_EVENT_PORT(data)	\
 	((data) &			\
 	 ASYNC_EVENT_CMPL_PORT_CONN_NOT_ALLOWED_EVENT_DATA1_PORT_ID_MASK)
@@ -2202,6 +2217,14 @@ static int bnxt_async_event_process(struct bnxt *bp,
 		}
 		goto async_event_process_exit;
 	}
+	case ASYNC_EVENT_CMPL_EVENT_ID_PPS_TIMESTAMP: {
+		bnxt_ptp_pps_event(bp, data1, data2);
+		goto async_event_process_exit;
+	}
+	case ASYNC_EVENT_CMPL_EVENT_ID_ERROR_REPORT: {
+		bnxt_event_error_report(bp, data1, data2);
+		goto async_event_process_exit;
+	}
 	default:
 		goto async_event_process_exit;
 	}
@@ -7495,9 +7518,14 @@ static int __bnxt_hwrm_ptp_qcfg(struct bnxt *bp)
 		rc = -ENODEV;
 		goto no_ptp;
 	}
-	return 0;
+	rc = bnxt_ptp_init(bp);
+	if (!rc)
+		return 0;
+
+	netdev_warn(bp->dev, "PTP initialization failed.\n");
 
 no_ptp:
+	bnxt_ptp_clear(bp);
 	kfree(ptp);
 	bp->ptp_cfg = NULL;
 	return rc;
@@ -7540,6 +7568,8 @@ static int __bnxt_hwrm_func_qcaps(struct bnxt *bp)
 	flags_ext = le32_to_cpu(resp->flags_ext);
 	if (flags_ext & FUNC_QCAPS_RESP_FLAGS_EXT_EXT_HW_STATS_SUPPORTED)
 		bp->fw_cap |= BNXT_FW_CAP_EXT_HW_STATS_SUPPORTED;
+	if (BNXT_PF(bp) && (flags_ext & FUNC_QCAPS_RESP_FLAGS_EXT_PTP_PPS_SUPPORTED))
+		bp->fw_cap |= BNXT_FW_CAP_PTP_PPS;
 
 	bp->tx_push_thresh = 0;
 	if ((flags & FUNC_QCAPS_RESP_FLAGS_PUSH_MODE_SUPPORTED) &&
@@ -7577,6 +7607,7 @@ static int __bnxt_hwrm_func_qcaps(struct bnxt *bp)
 		if (flags & FUNC_QCAPS_RESP_FLAGS_PTP_SUPPORTED) {
 			__bnxt_hwrm_ptp_qcfg(bp);
 		} else {
+			bnxt_ptp_clear(bp);
 			kfree(bp->ptp_cfg);
 			bp->ptp_cfg = NULL;
 		}
@@ -10277,15 +10308,9 @@ static int bnxt_open(struct net_device *dev)
 	if (rc)
 		return rc;
 
-	if (bnxt_ptp_init(bp)) {
-		netdev_warn(dev, "PTP initialization failed.\n");
-		kfree(bp->ptp_cfg);
-		bp->ptp_cfg = NULL;
-	}
 	rc = __bnxt_open_nic(bp, true, true);
 	if (rc) {
 		bnxt_hwrm_if_change(bp, false);
-		bnxt_ptp_clear(bp);
 	} else {
 		if (test_and_clear_bit(BNXT_STATE_FW_RESET_DET, &bp->state)) {
 			if (!test_bit(BNXT_STATE_IN_FW_RESET, &bp->state)) {
@@ -10376,7 +10401,6 @@ static int bnxt_close(struct net_device *dev)
 {
 	struct bnxt *bp = netdev_priv(dev);
 
-	bnxt_ptp_clear(bp);
 	bnxt_hwmon_close(bp);
 	bnxt_close_nic(bp, true, true);
 	bnxt_hwrm_shutdown_link(bp);
@@ -11363,7 +11387,6 @@ static void bnxt_fw_reset_close(struct bnxt *bp)
 		bnxt_clear_int_mode(bp);
 		pci_disable_device(bp->pdev);
 	}
-	bnxt_ptp_clear(bp);
 	__bnxt_close_nic(bp, true, false);
 	bnxt_vf_reps_free(bp);
 	bnxt_clear_int_mode(bp);
@@ -11399,13 +11422,20 @@ static bool is_bnxt_fw_ok(struct bnxt *bp)
 static void bnxt_force_fw_reset(struct bnxt *bp)
 {
 	struct bnxt_fw_health *fw_health = bp->fw_health;
+	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
 	u32 wait_dsecs;
 
 	if (!test_bit(BNXT_STATE_OPEN, &bp->state) ||
 	    test_bit(BNXT_STATE_IN_FW_RESET, &bp->state))
 		return;
 
-	set_bit(BNXT_STATE_IN_FW_RESET, &bp->state);
+	if (ptp) {
+		spin_lock_bh(&ptp->ptp_lock);
+		set_bit(BNXT_STATE_IN_FW_RESET, &bp->state);
+		spin_unlock_bh(&ptp->ptp_lock);
+	} else {
+		set_bit(BNXT_STATE_IN_FW_RESET, &bp->state);
+	}
 	bnxt_fw_reset_close(bp);
 	wait_dsecs = fw_health->master_func_wait_dsecs;
 	if (fw_health->master) {
@@ -11461,9 +11491,16 @@ void bnxt_fw_reset(struct bnxt *bp)
 	bnxt_rtnl_lock_sp(bp);
 	if (test_bit(BNXT_STATE_OPEN, &bp->state) &&
 	    !test_bit(BNXT_STATE_IN_FW_RESET, &bp->state)) {
+		struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
 		int n = 0, tmo;
 
-		set_bit(BNXT_STATE_IN_FW_RESET, &bp->state);
+		if (ptp) {
+			spin_lock_bh(&ptp->ptp_lock);
+			set_bit(BNXT_STATE_IN_FW_RESET, &bp->state);
+			spin_unlock_bh(&ptp->ptp_lock);
+		} else {
+			set_bit(BNXT_STATE_IN_FW_RESET, &bp->state);
+		}
 		if (bp->pf.active_vfs &&
 		    !test_bit(BNXT_STATE_FW_FATAL_COND, &bp->state))
 			n = bnxt_get_registered_vfs(bp);
@@ -12136,6 +12173,7 @@ static void bnxt_fw_reset_task(struct work_struct *work)
 			bnxt_reenable_sriov(bp);
 		bnxt_vf_reps_alloc(bp);
 		bnxt_vf_reps_open(bp);
+		bnxt_ptp_reapply_pps(bp);
 		bnxt_dl_health_recovery_done(bp);
 		bnxt_dl_health_status_update(bp, true);
 		rtnl_unlock();
@@ -12706,6 +12744,7 @@ static void bnxt_remove_one(struct pci_dev *pdev)
 	if (BNXT_PF(bp))
 		devlink_port_type_clear(&bp->dl_port);
 
+	bnxt_ptp_clear(bp);
 	pci_disable_pcie_error_reporting(pdev);
 	unregister_netdev(dev);
 	clear_bit(BNXT_STATE_IN_FW_RESET, &bp->state);
@@ -13318,6 +13357,7 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	bnxt_free_hwrm_short_cmd_req(bp);
 	bnxt_free_hwrm_resources(bp);
 	bnxt_ethtool_free(bp);
+	bnxt_ptp_clear(bp);
 	kfree(bp->ptp_cfg);
 	bp->ptp_cfg = NULL;
 	kfree(bp->fw_health);

drivers/net/ethernet/broadcom/bnxt/bnxt.h

@@ -496,6 +496,16 @@ struct rx_tpa_end_cmp_ext {
 	!!((data1) &							\
 	   ASYNC_EVENT_CMPL_ERROR_RECOVERY_EVENT_DATA1_FLAGS_RECOVERY_ENABLED)
 
+#define BNXT_EVENT_ERROR_REPORT_TYPE(data1)				\
+	(((data1) &							\
+	  ASYNC_EVENT_CMPL_ERROR_REPORT_BASE_EVENT_DATA1_ERROR_TYPE_MASK) >>\
+	 ASYNC_EVENT_CMPL_ERROR_REPORT_BASE_EVENT_DATA1_ERROR_TYPE_SFT)
+
+#define BNXT_EVENT_INVALID_SIGNAL_DATA(data2)				\
+	(((data2) &							\
+	  ASYNC_EVENT_CMPL_ERROR_REPORT_INVALID_SIGNAL_EVENT_DATA2_PIN_ID_MASK) >>\
+	 ASYNC_EVENT_CMPL_ERROR_REPORT_INVALID_SIGNAL_EVENT_DATA2_PIN_ID_SFT)
+
 struct nqe_cn {
 	__le16	type;
 	#define NQ_CN_TYPE_MASK           0x3fUL
@@ -1887,6 +1897,7 @@ struct bnxt {
 	#define BNXT_FW_CAP_VLAN_RX_STRIP		0x01000000
 	#define BNXT_FW_CAP_VLAN_TX_INSERT		0x02000000
 	#define BNXT_FW_CAP_EXT_HW_STATS_SUPPORTED	0x04000000
+	#define BNXT_FW_CAP_PTP_PPS			0x10000000
 	#define BNXT_FW_CAP_RING_MONITOR		0x40000000
 
 #define BNXT_NEW_RM(bp)		((bp)->fw_cap & BNXT_FW_CAP_NEW_RM)

drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c

@@ -55,16 +55,19 @@ static int bnxt_ptp_settime(struct ptp_clock_info *ptp_info,
 }
 
 /* Caller holds ptp_lock */
-static u64 bnxt_refclk_read(struct bnxt *bp, struct ptp_system_timestamp *sts)
+static int bnxt_refclk_read(struct bnxt *bp, struct ptp_system_timestamp *sts,
+			    u64 *ns)
 {
 	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
-	u64 ns;
+
+	if (test_bit(BNXT_STATE_IN_FW_RESET, &bp->state))
+		return -EIO;
 
 	ptp_read_system_prets(sts);
-	ns = readl(bp->bar0 + ptp->refclk_mapped_regs[0]);
+	*ns = readl(bp->bar0 + ptp->refclk_mapped_regs[0]);
 	ptp_read_system_postts(sts);
-	ns |= (u64)readl(bp->bar0 + ptp->refclk_mapped_regs[1]) << 32;
-	return ns;
+	*ns |= (u64)readl(bp->bar0 + ptp->refclk_mapped_regs[1]) << 32;
+	return 0;
 }
 
 static void bnxt_ptp_get_current_time(struct bnxt *bp)
@@ -75,7 +78,7 @@ static void bnxt_ptp_get_current_time(struct bnxt *bp)
 		return;
 	spin_lock_bh(&ptp->ptp_lock);
 	WRITE_ONCE(ptp->old_time, ptp->current_time);
-	ptp->current_time = bnxt_refclk_read(bp, NULL);
+	bnxt_refclk_read(bp, NULL, &ptp->current_time);
 	spin_unlock_bh(&ptp->ptp_lock);
 }
 
@@ -108,9 +111,14 @@ 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;
+	int rc;
 
 	spin_lock_bh(&ptp->ptp_lock);
-	cycles = bnxt_refclk_read(ptp->bp, sts);
+	rc = bnxt_refclk_read(ptp->bp, sts, &cycles);
+	if (rc) {
+		spin_unlock_bh(&ptp->ptp_lock);
+		return rc;
+	}
 	ns = timecounter_cyc2time(&ptp->tc, cycles);
 	spin_unlock_bh(&ptp->ptp_lock);
 	*ts = ns_to_timespec64(ns);
@@ -147,10 +155,207 @@ static int bnxt_ptp_adjfreq(struct ptp_clock_info *ptp_info, s32 ppb)
 	return rc;
 }
 
-static int bnxt_ptp_enable(struct ptp_clock_info *ptp,
+void bnxt_ptp_pps_event(struct bnxt *bp, u32 data1, u32 data2)
+{
+	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
+	struct ptp_clock_event event;
+	u64 ns, pps_ts;
+
+	pps_ts = EVENT_PPS_TS(data2, data1);
+	spin_lock_bh(&ptp->ptp_lock);
+	ns = timecounter_cyc2time(&ptp->tc, pps_ts);
+	spin_unlock_bh(&ptp->ptp_lock);
+
+	switch (EVENT_DATA2_PPS_EVENT_TYPE(data2)) {
+	case ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_EVENT_TYPE_INTERNAL:
+		event.pps_times.ts_real = ns_to_timespec64(ns);
+		event.type = PTP_CLOCK_PPSUSR;
+		event.index = EVENT_DATA2_PPS_PIN_NUM(data2);
+		break;
+	case ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_EVENT_TYPE_EXTERNAL:
+		event.timestamp = ns;
+		event.type = PTP_CLOCK_EXTTS;
+		event.index = EVENT_DATA2_PPS_PIN_NUM(data2);
+		break;
+	}
+
+	ptp_clock_event(bp->ptp_cfg->ptp_clock, &event);
+}
+
+static int bnxt_ptp_cfg_pin(struct bnxt *bp, u8 pin, u8 usage)
+{
+	struct hwrm_func_ptp_pin_cfg_input req = {0};
+	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
+	u8 state = usage != BNXT_PPS_PIN_NONE;
+	u8 *pin_state, *pin_usg;
+	u32 enables;
+	int rc;
+
+	if (!TSIO_PIN_VALID(pin)) {
+		netdev_err(ptp->bp->dev, "1PPS: Invalid pin. Check pin-function configuration\n");
+		return -EOPNOTSUPP;
+	}
+
+	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_PTP_PIN_CFG, -1, -1);
+	enables = (FUNC_PTP_PIN_CFG_REQ_ENABLES_PIN0_STATE |
+		   FUNC_PTP_PIN_CFG_REQ_ENABLES_PIN0_USAGE) << (pin * 2);
+	req.enables = cpu_to_le32(enables);
+
+	pin_state = &req.pin0_state;
+	pin_usg = &req.pin0_usage;
+
+	*(pin_state + (pin * 2)) = state;
+	*(pin_usg + (pin * 2)) = usage;
+
+	rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
+	if (rc)
+		return rc;
+
+	ptp->pps_info.pins[pin].usage = usage;
+	ptp->pps_info.pins[pin].state = state;
+
+	return 0;
+}
+
+static int bnxt_ptp_cfg_event(struct bnxt *bp, u8 event)
+{
+	struct hwrm_func_ptp_cfg_input req = {0};
+
+	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_PTP_CFG, -1, -1);
+	req.enables = cpu_to_le16(FUNC_PTP_CFG_REQ_ENABLES_PTP_PPS_EVENT);
+	req.ptp_pps_event = event;
+	return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
+}
+
+void bnxt_ptp_reapply_pps(struct bnxt *bp)
+{
+	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
+	struct bnxt_pps *pps;
+	u32 pin = 0;
+	int rc;
+
+	if (!ptp || !(bp->fw_cap & BNXT_FW_CAP_PTP_PPS) ||
+	    !(ptp->ptp_info.pin_config))
+		return;
+	pps = &ptp->pps_info;
+	for (pin = 0; pin < BNXT_MAX_TSIO_PINS; pin++) {
+		if (pps->pins[pin].state) {
+			rc = bnxt_ptp_cfg_pin(bp, pin, pps->pins[pin].usage);
+			if (!rc && pps->pins[pin].event)
+				rc = bnxt_ptp_cfg_event(bp,
+							pps->pins[pin].event);
+			if (rc)
+				netdev_err(bp->dev, "1PPS: Failed to configure pin%d\n",
+					   pin);
+		}
+	}
+}
+
+static int bnxt_get_target_cycles(struct bnxt_ptp_cfg *ptp, u64 target_ns,
+				  u64 *cycles_delta)
+{
+	u64 cycles_now;
+	u64 nsec_now, nsec_delta;
+	int rc;
+
+	spin_lock_bh(&ptp->ptp_lock);
+	rc = bnxt_refclk_read(ptp->bp, NULL, &cycles_now);
+	if (rc) {
+		spin_unlock_bh(&ptp->ptp_lock);
+		return rc;
+	}
+	nsec_now = timecounter_cyc2time(&ptp->tc, cycles_now);
+	spin_unlock_bh(&ptp->ptp_lock);
+
+	nsec_delta = target_ns - nsec_now;
+	*cycles_delta = div64_u64(nsec_delta << ptp->cc.shift, ptp->cc.mult);
+	return 0;
+}
+
+static int bnxt_ptp_perout_cfg(struct bnxt_ptp_cfg *ptp,
+			       struct ptp_clock_request *rq)
+{
+	struct hwrm_func_ptp_cfg_input req = {0};
+	struct bnxt *bp = ptp->bp;
+	struct timespec64 ts;
+	u64 target_ns, delta;
+	u16 enables;
+	int rc;
+
+	ts.tv_sec = rq->perout.start.sec;
+	ts.tv_nsec = rq->perout.start.nsec;
+	target_ns = timespec64_to_ns(&ts);
+
+	rc = bnxt_get_target_cycles(ptp, target_ns, &delta);
+	if (rc)
+		return rc;
+
+	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_PTP_CFG, -1, -1);
+
+	enables = FUNC_PTP_CFG_REQ_ENABLES_PTP_FREQ_ADJ_EXT_PERIOD |
+		  FUNC_PTP_CFG_REQ_ENABLES_PTP_FREQ_ADJ_EXT_UP |
+		  FUNC_PTP_CFG_REQ_ENABLES_PTP_FREQ_ADJ_EXT_PHASE;
+	req.enables = cpu_to_le16(enables);
+	req.ptp_pps_event = 0;
+	req.ptp_freq_adj_dll_source = 0;
+	req.ptp_freq_adj_dll_phase = 0;
+	req.ptp_freq_adj_ext_period = cpu_to_le32(NSEC_PER_SEC);
+	req.ptp_freq_adj_ext_up = 0;
+	req.ptp_freq_adj_ext_phase_lower = cpu_to_le32(delta);
+
+	return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
+}
+
+static int bnxt_ptp_enable(struct ptp_clock_info *ptp_info,
 			   struct ptp_clock_request *rq, int on)
 {
-	return -EOPNOTSUPP;
+	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
+						ptp_info);
+	struct bnxt *bp = ptp->bp;
+	u8 pin_id;
+	int rc;
+
+	switch (rq->type) {
+	case PTP_CLK_REQ_EXTTS:
+		/* Configure an External PPS IN */
+		pin_id = ptp_find_pin(ptp->ptp_clock, PTP_PF_EXTTS,
+				      rq->extts.index);
+		if (!on)
+			break;
+		rc = bnxt_ptp_cfg_pin(bp, pin_id, BNXT_PPS_PIN_PPS_IN);
+		if (rc)
+			return rc;
+		rc = bnxt_ptp_cfg_event(bp, BNXT_PPS_EVENT_EXTERNAL);
+		if (!rc)
+			ptp->pps_info.pins[pin_id].event = BNXT_PPS_EVENT_EXTERNAL;
+		return rc;
+	case PTP_CLK_REQ_PEROUT:
+		/* Configure a Periodic PPS OUT */
+		pin_id = ptp_find_pin(ptp->ptp_clock, PTP_PF_PEROUT,
+				      rq->perout.index);
+		if (!on)
+			break;
+
+		rc = bnxt_ptp_cfg_pin(bp, pin_id, BNXT_PPS_PIN_PPS_OUT);
+		if (!rc)
+			rc = bnxt_ptp_perout_cfg(ptp, rq);
+
+		return rc;
+	case PTP_CLK_REQ_PPS:
+		/* Configure PHC PPS IN */
+		rc = bnxt_ptp_cfg_pin(bp, 0, BNXT_PPS_PIN_PPS_IN);
+		if (rc)
+			return rc;
+		rc = bnxt_ptp_cfg_event(bp, BNXT_PPS_EVENT_INTERNAL);
+		if (!rc)
+			ptp->pps_info.pins[0].event = BNXT_PPS_EVENT_INTERNAL;
+		return rc;
+	default:
+		netdev_err(ptp->bp->dev, "Unrecognized PIN function\n");
+		return -EOPNOTSUPP;
+	}
+
+	return bnxt_ptp_cfg_pin(bp, pin_id, BNXT_PPS_PIN_NONE);
 }
 
 static int bnxt_hwrm_ptp_cfg(struct bnxt *bp)
@@ -309,8 +514,10 @@ static void bnxt_unmap_ptp_regs(struct bnxt *bp)
 static u64 bnxt_cc_read(const struct cyclecounter *cc)
 {
 	struct bnxt_ptp_cfg *ptp = container_of(cc, struct bnxt_ptp_cfg, cc);
+	u64 ns = 0;
 
-	return bnxt_refclk_read(ptp->bp, NULL);
+	bnxt_refclk_read(ptp->bp, NULL, &ns);
+	return ns;
 }
 
 static void bnxt_stamp_tx_skb(struct bnxt *bp, struct sk_buff *skb)
@@ -402,6 +609,80 @@ static const struct ptp_clock_info bnxt_ptp_caps = {
 	.enable		= bnxt_ptp_enable,
 };
 
+static int bnxt_ptp_verify(struct ptp_clock_info *ptp_info, unsigned int pin,
+			   enum ptp_pin_function func, unsigned int chan)
+{
+	struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
+						ptp_info);
+	/* Allow only PPS pin function configuration */
+	if (ptp->pps_info.pins[pin].usage <= BNXT_PPS_PIN_PPS_OUT &&
+	    func != PTP_PF_PHYSYNC)
+		return 0;
+	else
+		return -EOPNOTSUPP;
+}
+
+/* bp->hwrm_cmd_lock held by the caller */
+static int bnxt_ptp_pps_init(struct bnxt *bp)
+{
+	struct hwrm_func_ptp_pin_qcfg_output *resp = bp->hwrm_cmd_resp_addr;
+	struct hwrm_func_ptp_pin_qcfg_input req = {0};
+	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
+	struct ptp_clock_info *ptp_info;
+	struct bnxt_pps *pps_info;
+	u8 *pin_usg;
+	u32 i, rc;
+
+	/* Query current/default PIN CFG */
+	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_PTP_PIN_QCFG, -1, -1);
+
+	rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
+	if (rc || !resp->num_pins)
+		return -EOPNOTSUPP;
+
+	ptp_info = &ptp->ptp_info;
+	pps_info = &ptp->pps_info;
+	pps_info->num_pins = resp->num_pins;
+	ptp_info->n_pins = pps_info->num_pins;
+	ptp_info->pin_config = kcalloc(ptp_info->n_pins,
+				       sizeof(*ptp_info->pin_config),
+				       GFP_KERNEL);
+	if (!ptp_info->pin_config)
+		return -ENOMEM;
+
+	/* Report the TSIO capability to kernel */
+	pin_usg = &resp->pin0_usage;
+	for (i = 0; i < pps_info->num_pins; i++, pin_usg++) {
+		snprintf(ptp_info->pin_config[i].name,
+			 sizeof(ptp_info->pin_config[i].name), "bnxt_pps%d", i);
+		ptp_info->pin_config[i].index = i;
+		ptp_info->pin_config[i].chan = i;
+		if (*pin_usg == BNXT_PPS_PIN_PPS_IN)
+			ptp_info->pin_config[i].func = PTP_PF_EXTTS;
+		else if (*pin_usg == BNXT_PPS_PIN_PPS_OUT)
+			ptp_info->pin_config[i].func = PTP_PF_PEROUT;
+		else
+			ptp_info->pin_config[i].func = PTP_PF_NONE;
+
+		pps_info->pins[i].usage = *pin_usg;
+	}
+
+	/* Only 1 each of ext_ts and per_out pins is available in HW */
+	ptp_info->n_ext_ts = 1;
+	ptp_info->n_per_out = 1;
+	ptp_info->pps = 1;
+	ptp_info->verify = bnxt_ptp_verify;
+
+	return 0;
+}
+
+static bool bnxt_pps_config_ok(struct bnxt *bp)
+{
+	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
+
+	return !(bp->fw_cap & BNXT_FW_CAP_PTP_PPS) == !ptp->ptp_info.pin_config;
+}
+
 int bnxt_ptp_init(struct bnxt *bp)
 {
 	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
@@ -414,6 +695,15 @@ int bnxt_ptp_init(struct bnxt *bp)
 	if (rc)
 		return rc;
 
+	if (ptp->ptp_clock && bnxt_pps_config_ok(bp))
+		return 0;
+
+	if (ptp->ptp_clock) {
+		ptp_clock_unregister(ptp->ptp_clock);
+		ptp->ptp_clock = NULL;
+		kfree(ptp->ptp_info.pin_config);
+		ptp->ptp_info.pin_config = NULL;
+	}
 	atomic_set(&ptp->tx_avail, BNXT_MAX_TX_TS);
 	spin_lock_init(&ptp->ptp_lock);
 
@@ -426,6 +716,10 @@ int bnxt_ptp_init(struct bnxt *bp)
 	timecounter_init(&ptp->tc, &ptp->cc, ktime_to_ns(ktime_get_real()));
 
 	ptp->ptp_info = bnxt_ptp_caps;
+	if ((bp->fw_cap & BNXT_FW_CAP_PTP_PPS)) {
+		if (bnxt_ptp_pps_init(bp))
+			netdev_err(bp->dev, "1pps not initialized, continuing without 1pps support\n");
+	}
 	ptp->ptp_clock = ptp_clock_register(&ptp->ptp_info, &bp->pdev->dev);
 	if (IS_ERR(ptp->ptp_clock)) {
 		int err = PTR_ERR(ptp->ptp_clock);
@@ -436,7 +730,7 @@ int bnxt_ptp_init(struct bnxt *bp)
 	}
 	if (bp->flags & BNXT_FLAG_CHIP_P5) {
 		spin_lock_bh(&ptp->ptp_lock);
-		ptp->current_time = bnxt_refclk_read(bp, NULL);
+		bnxt_refclk_read(bp, NULL, &ptp->current_time);
 		WRITE_ONCE(ptp->old_time, ptp->current_time);
 		spin_unlock_bh(&ptp->ptp_lock);
 		ptp_schedule_worker(ptp->ptp_clock, 0);
@@ -455,6 +749,9 @@ void bnxt_ptp_clear(struct bnxt *bp)
 		ptp_clock_unregister(ptp->ptp_clock);
 
 	ptp->ptp_clock = NULL;
+	kfree(ptp->ptp_info.pin_config);
+	ptp->ptp_info.pin_config = NULL;
+
 	if (ptp->tx_skb) {
 		dev_kfree_skb_any(ptp->tx_skb);
 		ptp->tx_skb = NULL;

drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h

@@ -21,11 +21,62 @@
 #define BNXT_PTP_QTS_TX_ENABLES	(PORT_TS_QUERY_REQ_ENABLES_PTP_SEQ_ID |	\
 				 PORT_TS_QUERY_REQ_ENABLES_TS_REQ_TIMEOUT)
 
+struct pps_pin {
+	u8 event;
+	u8 usage;
+	u8 state;
+};
+
+#define TSIO_PIN_VALID(pin) ((pin) < (BNXT_MAX_TSIO_PINS))
+
+#define EVENT_DATA2_PPS_EVENT_TYPE(data2)				\
+	((data2) & ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_EVENT_TYPE)
+
+#define EVENT_DATA2_PPS_PIN_NUM(data2)					\
+	(((data2) &							\
+	  ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_PIN_NUMBER_MASK) >>\
+	 ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_PIN_NUMBER_SFT)
+
+#define BNXT_DATA2_UPPER_MSK						\
+	ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_PPS_TIMESTAMP_UPPER_MASK
+
+#define BNXT_DATA2_UPPER_SFT						\
+	(32 -								\
+	 ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_PPS_TIMESTAMP_UPPER_SFT)
+
+#define BNXT_DATA1_LOWER_MSK						\
+	ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA1_PPS_TIMESTAMP_LOWER_MASK
+
+#define BNXT_DATA1_LOWER_SFT						\
+	  ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA1_PPS_TIMESTAMP_LOWER_SFT
+
+#define EVENT_PPS_TS(data2, data1)					\
+	(((u64)((data2) & BNXT_DATA2_UPPER_MSK) << BNXT_DATA2_UPPER_SFT) |\
+	 (((data1) & BNXT_DATA1_LOWER_MSK) >> BNXT_DATA1_LOWER_SFT))
+
+#define BNXT_PPS_PIN_DISABLE	0
+#define BNXT_PPS_PIN_ENABLE	1
+#define BNXT_PPS_PIN_NONE	0
+#define BNXT_PPS_PIN_PPS_IN	1
+#define BNXT_PPS_PIN_PPS_OUT	2
+#define BNXT_PPS_PIN_SYNC_IN	3
+#define BNXT_PPS_PIN_SYNC_OUT	4
+
+#define BNXT_PPS_EVENT_INTERNAL	1
+#define BNXT_PPS_EVENT_EXTERNAL	2
+
+struct bnxt_pps {
+	u8 num_pins;
+#define BNXT_MAX_TSIO_PINS	4
+	struct pps_pin pins[BNXT_MAX_TSIO_PINS];
+};
+
 struct bnxt_ptp_cfg {
 	struct ptp_clock_info	ptp_info;
 	struct ptp_clock	*ptp_clock;
 	struct cyclecounter	cc;
 	struct timecounter	tc;
+	struct bnxt_pps		pps_info;
 	/* serialize timecounter access */
 	spinlock_t		ptp_lock;
 	struct sk_buff		*tx_skb;
@@ -71,6 +122,8 @@ do {						\
 #endif
 
 int bnxt_ptp_parse(struct sk_buff *skb, u16 *seq_id);
+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);
 int bnxt_hwtstamp_get(struct net_device *dev, struct ifreq *ifr);
 int bnxt_get_tx_ts_p5(struct bnxt *bp, struct sk_buff *skb);