dpaa2-eth: define a global ptp_qoriq structure pointer

Define a global ptp_qoriq structure pointer, and export to use.
The ptp clock operations will be used in dpaa2-eth driver.
For example, supporting one step timestamping needs to write
current time to hardware frame annotation before sending and
then hardware inserts the delay time on frame during sending.
So in driver, at least clock gettime operation will be needed
to make sure right time is written to hardware frame annotation
for one step timestamping.
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c

@@ -15,6 +15,7 @@
 #include <linux/fsl/mc.h>
 #include <linux/bpf.h>
 #include <linux/bpf_trace.h>
+#include <linux/fsl/ptp_qoriq.h>
 #include <net/pkt_cls.h>
 #include <net/sock.h>
 
@@ -30,6 +31,9 @@ MODULE_LICENSE("Dual BSD/GPL");
 MODULE_AUTHOR("Freescale Semiconductor, Inc");
 MODULE_DESCRIPTION("Freescale DPAA2 Ethernet Driver");
 
+struct ptp_qoriq *dpaa2_ptp;
+EXPORT_SYMBOL(dpaa2_ptp);
+
 static void *dpaa2_iova_to_virt(struct iommu_domain *domain,
 				dma_addr_t iova_addr)
 {

drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h

@@ -491,6 +491,7 @@ struct dpaa2_eth_priv {
 
 extern const struct ethtool_ops dpaa2_ethtool_ops;
 extern int dpaa2_phc_index;
+extern struct ptp_qoriq *dpaa2_ptp;
 
 static inline int dpaa2_eth_cmp_dpni_ver(struct dpaa2_eth_priv *priv,
 					 u16 ver_major, u16 ver_minor)

drivers/net/ethernet/freescale/dpaa2/dpaa2-ptp.c

@@ -2,6 +2,7 @@
 /*
  * Copyright 2013-2016 Freescale Semiconductor Inc.
  * Copyright 2016-2018 NXP
+ * Copyright 2020 NXP
  */
 
 #include <linux/module.h>
@@ -9,7 +10,6 @@
 #include <linux/of_address.h>
 #include <linux/msi.h>
 #include <linux/fsl/mc.h>
-#include <linux/fsl/ptp_qoriq.h>
 
 #include "dpaa2-ptp.h"
 
@@ -201,6 +201,7 @@ static int dpaa2_ptp_probe(struct fsl_mc_device *mc_dev)
 		goto err_free_threaded_irq;
 
 	dpaa2_phc_index = ptp_qoriq->phc_index;
+	dpaa2_ptp = ptp_qoriq;
 	dev_set_drvdata(dev, ptp_qoriq);
 
 	return 0;

drivers/net/ethernet/freescale/dpaa2/dpaa2-ptp.h

 /* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Copyright 2018 NXP
+ * Copyright 2020 NXP
  */
 
 #ifndef __RTC_H
 #define __RTC_H
 
+#include <linux/fsl/ptp_qoriq.h>
+
 #include "dprtc.h"
 #include "dprtc-cmd.h"
 
 extern int dpaa2_phc_index;
+extern struct ptp_qoriq *dpaa2_ptp;
 
 #endif