[PATCH v2 3/4] lib/ethdev: add support for displaying lanes capability

[Damodharam Ammepalli <damodharam.ammepalli@broadcom.com>]

Add new rte_lib callback to display ethernet controller's
supporting speeds and bitmap of supported lanes per speed.

The new command display looks like this.

testpmd> show port 0 speed_lanes capabilities

 Supported speeds         Valid lanes
-----------------------------------
 10 Gbps                  1
 25 Gbps                  1
 40 Gbps                  4
 50 Gbps                  1 2
 100 Gbps                 1 2 4
 200 Gbps                 2 4
 400 Gbps                 4 8
testpmd>

Signed-off-by: Damodharam Ammepalli <damodharam.ammepalli@broadcom.com>
---
 lib/ethdev/ethdev_driver.h | 21 +++++++++++++++++++++
 lib/ethdev/rte_ethdev.c    | 13 +++++++++++++
 lib/ethdev/rte_ethdev.h    | 32 ++++++++++++++++++++++++++++++++
 lib/ethdev/version.map     |  1 +
 4 files changed, 67 insertions(+)

diff --git a/lib/ethdev/ethdev_driver.h b/lib/ethdev/ethdev_driver.h
index b1f473e4de..5951986cec 100644
--- a/lib/ethdev/ethdev_driver.h
+++ b/lib/ethdev/ethdev_driver.h
@@ -1224,6 +1224,26 @@ typedef int (*eth_speed_lanes_get_t)(struct rte_eth_dev *dev,
  */
 typedef int (*eth_speed_lanes_set_t)(struct rte_eth_dev *dev, uint32_t speed_lanes_capa);
 
+/**
+ * @internal
+ * Get speed vs number of lanes supported bitmap that controller supports
+ *
+ * @param dev
+ *   ethdev handle of port.
+ * @param speed_lanes_capa
+ *   int array of size max speeds bitmap ie 17
+ * @return
+ *   Negative errno value on error, 0 on success.
+ *
+ * @retval 0
+ *   Success, driver updates the speed_lanes_capa bitmap.
+ * @retval -ENOTSUP
+ *   Operation is not supported.
+ * @retval -EIO
+ *   Device is removed.
+ */
+typedef int (*eth_speed_lanes_get_capa_t)(struct rte_eth_dev *dev, uint32_t *speed_lanes_bmap);
+
 /**
  * @internal
  * Dump Tx descriptor info to a file.
@@ -1523,6 +1543,7 @@ struct eth_dev_ops {
 	eth_speed_lanes_get_t speed_lanes_get;
 	/** Set number of speed lanes */
 	eth_speed_lanes_set_t speed_lanes_set;
+	eth_speed_lanes_get_capa_t speed_lanes_get_capa;
 };
 
 /**
diff --git a/lib/ethdev/rte_ethdev.c b/lib/ethdev/rte_ethdev.c
index 45e2f7645b..1ac5174d62 100644
--- a/lib/ethdev/rte_ethdev.c
+++ b/lib/ethdev/rte_ethdev.c
@@ -7021,6 +7021,19 @@ rte_eth_speed_lanes_get(uint16_t port_id, struct rte_eth_speed_lanes_capa *capa)
 	return eth_err(port_id, (*dev->dev_ops->speed_lanes_get)(dev, capa));
 }
 
+int
+rte_eth_speed_lanes_get_capa(uint16_t port_id, uint32_t *speed_lanes_bmap)
+{
+        struct rte_eth_dev *dev;
+
+        RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
+        dev = &rte_eth_devices[port_id];
+
+        if (*dev->dev_ops->speed_lanes_get == NULL)
+                return -ENOTSUP;
+        return eth_err(port_id, (*dev->dev_ops->speed_lanes_get_capa)(dev, speed_lanes_bmap));
+}
+
 int
 rte_eth_speed_lanes_set(uint16_t port_id, uint32_t speed_lanes_capa)
 {
diff --git a/lib/ethdev/rte_ethdev.h b/lib/ethdev/rte_ethdev.h
index caae1f27c6..b8a29416b6 100644
--- a/lib/ethdev/rte_ethdev.h
+++ b/lib/ethdev/rte_ethdev.h
@@ -308,6 +308,16 @@ struct rte_eth_stats {
 #define RTE_ETH_LINK_SPEED_400G    RTE_BIT32(16) /**< 400 Gbps */
 /**@}*/
 
+/**@{@name Link speed lane capabilities
+ * Device supported speeds lane bitmap flags
+ */
+#define RTE_ETH_LINK_SPEED_MAX_BIT	17 /**< RTE_ETH_LINK_SPEED_400G bit position + 1 */
+#define LANE_1	RTE_BIT32(1)
+#define LANE_2 	RTE_BIT32(2)
+#define LANE_4 	RTE_BIT32(4)
+#define LANE_8 	RTE_BIT32(8)
+/**@}*/
+
 /**@{@name Link speed
  * Ethernet numeric link speeds in Mbps
  */
@@ -6969,6 +6979,28 @@ int rte_eth_speed_lanes_get(uint16_t port_id, struct rte_eth_speed_lanes_capa *c
 __rte_experimental
 int rte_eth_speed_lanes_set(uint16_t port_id, uint32_t speed_lanes_capa);
 
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change, or be removed, without prior notice
+ *
+ * Set speed lanes supported by the NIC.
+ *
+ * @param port_id
+ *   The port identifier of the Ethernet device.
+ * @param speed_lanes_bmap
+ *   speed_lanes_bmap int array updated by driver by valid lanes bmap.
+ *
+ * @return
+ *  - (>=0) valid input and supported by driver or hardware.
+ *   - (-ENOTSUP) if underlying hardware OR driver doesn't support.
+ *     that operation.
+ *   - (-EIO) if device is removed.
+ *   - (-ENODEV)  if *port_id* invalid.
+ *   - (-EINVAL)  if *speed_lanes* invalid
+ */
+__rte_experimental
+int rte_eth_speed_lanes_get_capa(uint16_t port_id, uint32_t *speed_lanes_bmap);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/ethdev/version.map b/lib/ethdev/version.map
index 9c27980f3a..c453494b8d 100644
--- a/lib/ethdev/version.map
+++ b/lib/ethdev/version.map
@@ -327,6 +327,7 @@ EXPERIMENTAL {
 	rte_flow_template_table_resize_complete;
 	rte_eth_speed_lanes_get;
 	rte_eth_speed_lanes_set;
+	rte_eth_speed_lanes_get_capa;
 };
 
 INTERNAL {
-- 
2.39.3


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