[PATCH v3 11/15] net/dpaa: check status before configuring shared MAC

[nipun.gupta@nxp.com]

From: Nipun Gupta <nipun.gupta@nxp.com>

For shared MAC interface, it is a prerequisite to enable the
interface in the kernel, before using it in user-space. This
patch makes sure that device is not getting configured in
case shared MAC interface is not enabled in the kernel.

Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
---
 drivers/bus/dpaa/base/fman/fman_hw.c | 11 +++++++++++
 drivers/bus/dpaa/include/fsl_fman.h  |  2 ++
 drivers/bus/dpaa/version.map         |  1 +
 drivers/net/dpaa/dpaa_ethdev.c       | 13 ++++++++++++-
 4 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/drivers/bus/dpaa/base/fman/fman_hw.c b/drivers/bus/dpaa/base/fman/fman_hw.c
index af9bac76c2..24a99f7235 100644
--- a/drivers/bus/dpaa/base/fman/fman_hw.c
+++ b/drivers/bus/dpaa/base/fman/fman_hw.c
@@ -314,6 +314,17 @@ fman_if_disable_rx(struct fman_if *p)
 	out_be32(__if->ccsr_map + 8, in_be32(__if->ccsr_map + 8) & ~(u32)2);
 }
 
+int
+fman_if_get_rx_status(struct fman_if *p)
+{
+	struct __fman_if *__if = container_of(p, struct __fman_if, __if);
+
+	assert(fman_ccsr_map_fd != -1);
+
+	/* return true if RX bit is set */
+	return !!(in_be32(__if->ccsr_map + 8) & (u32)2);
+}
+
 void
 fman_if_loopback_enable(struct fman_if *p)
 {
diff --git a/drivers/bus/dpaa/include/fsl_fman.h b/drivers/bus/dpaa/include/fsl_fman.h
index f3a5d05970..acb344584f 100644
--- a/drivers/bus/dpaa/include/fsl_fman.h
+++ b/drivers/bus/dpaa/include/fsl_fman.h
@@ -81,6 +81,8 @@ __rte_internal
 void fman_if_enable_rx(struct fman_if *p);
 __rte_internal
 void fman_if_disable_rx(struct fman_if *p);
+__rte_internal
+int fman_if_get_rx_status(struct fman_if *p);
 
 /* Enable/disable loopback on specific interfaces */
 __rte_internal
diff --git a/drivers/bus/dpaa/version.map b/drivers/bus/dpaa/version.map
index 900635b210..1a840fd1a5 100644
--- a/drivers/bus/dpaa/version.map
+++ b/drivers/bus/dpaa/version.map
@@ -33,6 +33,7 @@ INTERNAL {
 	fman_if_get_fdoff;
 	fman_if_get_maxfrm;
 	fman_if_get_sg_enable;
+	fman_if_get_rx_status;
 	fman_if_loopback_disable;
 	fman_if_loopback_enable;
 	fman_if_promiscuous_disable;
diff --git a/drivers/net/dpaa/dpaa_ethdev.c b/drivers/net/dpaa/dpaa_ethdev.c
index e49f765434..3972ecaed8 100644
--- a/drivers/net/dpaa/dpaa_ethdev.c
+++ b/drivers/net/dpaa/dpaa_ethdev.c
@@ -195,6 +195,7 @@ dpaa_eth_dev_configure(struct rte_eth_dev *dev)
 	struct rte_eth_conf *eth_conf = &dev->data->dev_conf;
 	uint64_t rx_offloads = eth_conf->rxmode.offloads;
 	uint64_t tx_offloads = eth_conf->txmode.offloads;
+	struct dpaa_if *dpaa_intf = dev->data->dev_private;
 	struct rte_device *rdev = dev->device;
 	struct rte_eth_link *link = &dev->data->dev_link;
 	struct rte_dpaa_device *dpaa_dev;
@@ -203,7 +204,7 @@ dpaa_eth_dev_configure(struct rte_eth_dev *dev)
 	struct rte_intr_handle *intr_handle;
 	uint32_t max_rx_pktlen;
 	int speed, duplex;
-	int ret;
+	int ret, rx_status;
 
 	PMD_INIT_FUNC_TRACE();
 
@@ -211,6 +212,16 @@ dpaa_eth_dev_configure(struct rte_eth_dev *dev)
 	intr_handle = dpaa_dev->intr_handle;
 	__fif = container_of(fif, struct __fman_if, __if);
 
+	/* Check if interface is enabled in case of shared MAC */
+	if (fif->is_shared_mac) {
+		rx_status = fman_if_get_rx_status(fif);
+		if (!rx_status) {
+			DPAA_PMD_ERR("%s Interface not enabled in kernel!",
+				     dpaa_intf->name);
+			return -EHOSTDOWN;
+		}
+	}
+
 	/* Rx offloads which are enabled by default */
 	if (dev_rx_offloads_nodis & ~rx_offloads) {
 		DPAA_PMD_INFO(
-- 
2.17.1