octeontx2-nicvf: Add PTP hardware clock support to NIX VF

This patch adds PTP PHC support to NIX VF interfaces. This enables
a VF to run PTP master/slave instance. PTP block being a shared
hardware resource it is recommended to avoid running multiple
PTP instances in the system which will impact the PTP clock
accuracy.

Signed-off-by: Naveen Mamindlapalli <naveenm@marvell.com>
Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
Signed-off-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c

@@ -730,6 +730,9 @@ static int rvu_cgx_ptp_rx_cfg(struct rvu *rvu, u16 pcifunc, bool enable)
 int rvu_mbox_handler_cgx_ptp_rx_enable(struct rvu *rvu, struct msg_req *req,
 				       struct msg_rsp *rsp)
 {
+	if (!is_pf_cgxmapped(rvu, rvu_get_pf(req->hdr.pcifunc)))
+		return -EPERM;
+
 	return rvu_cgx_ptp_rx_cfg(rvu, req->hdr.pcifunc, true);
 }
 

drivers/net/ethernet/marvell/octeontx2/nic/Makefile

@@ -9,6 +9,6 @@ obj-$(CONFIG_OCTEONTX2_VF) += rvu_nicvf.o
 rvu_nicpf-y := otx2_pf.o otx2_common.o otx2_txrx.o otx2_ethtool.o \
                otx2_ptp.o otx2_flows.o otx2_tc.o cn10k.o otx2_dmac_flt.o \
                otx2_devlink.o
-rvu_nicvf-y := otx2_vf.o otx2_devlink.o
+rvu_nicvf-y := otx2_vf.o otx2_devlink.o otx2_ptp.o
 
 ccflags-y += -I$(srctree)/drivers/net/ethernet/marvell/octeontx2/af

drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h

@@ -834,6 +834,9 @@ int otx2_open(struct net_device *netdev);
 int otx2_stop(struct net_device *netdev);
 int otx2_set_real_num_queues(struct net_device *netdev,
 			     int tx_queues, int rx_queues);
+int otx2_ioctl(struct net_device *netdev, struct ifreq *req, int cmd);
+int otx2_config_hwtstamp(struct net_device *netdev, struct ifreq *ifr);
+
 /* MCAM filter related APIs */
 int otx2_mcam_flow_init(struct otx2_nic *pf);
 int otx2vf_mcam_flow_init(struct otx2_nic *pfvf);

drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c

@@ -1347,6 +1347,7 @@ static const struct ethtool_ops otx2vf_ethtool_ops = {
 	.get_pauseparam		= otx2_get_pauseparam,
 	.set_pauseparam		= otx2_set_pauseparam,
 	.get_link_ksettings     = otx2vf_get_link_ksettings,
+	.get_ts_info		= otx2_get_ts_info,
 };
 
 void otx2vf_set_ethtool_ops(struct net_device *netdev)

drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c

@@ -1975,7 +1975,7 @@ static int otx2_config_hw_tx_tstamp(struct otx2_nic *pfvf, bool enable)
 	return 0;
 }
 
-static int otx2_config_hwtstamp(struct net_device *netdev, struct ifreq *ifr)
+int otx2_config_hwtstamp(struct net_device *netdev, struct ifreq *ifr)
 {
 	struct otx2_nic *pfvf = netdev_priv(netdev);
 	struct hwtstamp_config config;
@@ -2031,8 +2031,9 @@ static int otx2_config_hwtstamp(struct net_device *netdev, struct ifreq *ifr)
 	return copy_to_user(ifr->ifr_data, &config,
 			    sizeof(config)) ? -EFAULT : 0;
 }
+EXPORT_SYMBOL(otx2_config_hwtstamp);
 
-static int otx2_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
+int otx2_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
 {
 	struct otx2_nic *pfvf = netdev_priv(netdev);
 	struct hwtstamp_config *cfg = &pfvf->tstamp;
@@ -2047,6 +2048,7 @@ static int otx2_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
 		return -EOPNOTSUPP;
 	}
 }
+EXPORT_SYMBOL(otx2_ioctl);
 
 static int otx2_do_set_vf_mac(struct otx2_nic *pf, int vf, const u8 *mac)
 {

drivers/net/ethernet/marvell/octeontx2/nic/otx2_ptp.c

@@ -223,6 +223,11 @@ int otx2_ptp_init(struct otx2_nic *pfvf)
 	struct ptp_req *req;
 	int err;
 
+	if (is_otx2_lbkvf(pfvf->pdev)) {
+		pfvf->ptp = NULL;
+		return 0;
+	}
+
 	mutex_lock(&pfvf->mbox.lock);
 	/* check if PTP block is available */
 	req = otx2_mbox_alloc_msg_ptp_op(&pfvf->mbox);

drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c

@@ -8,9 +8,11 @@
 #include <linux/etherdevice.h>
 #include <linux/module.h>
 #include <linux/pci.h>
+#include <linux/net_tstamp.h>
 
 #include "otx2_common.h"
 #include "otx2_reg.h"
+#include "otx2_ptp.h"
 #include "cn10k.h"
 
 #define DRV_NAME	"rvu_nicvf"
@@ -500,6 +502,7 @@ static const struct net_device_ops otx2vf_netdev_ops = {
 	.ndo_set_features = otx2vf_set_features,
 	.ndo_get_stats64 = otx2_get_stats64,
 	.ndo_tx_timeout = otx2_tx_timeout,
+	.ndo_do_ioctl	= otx2_ioctl,
 };
 
 static int otx2_wq_init(struct otx2_nic *vf)
@@ -640,6 +643,9 @@ static int otx2vf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	if (err)
 		goto err_detach_rsrc;
 
+	/* Don't check for error.  Proceed without ptp */
+	otx2_ptp_init(vf);
+
 	/* Assign default mac address */
 	otx2_get_mac_from_af(netdev);