net/ixgbe: add API to update SBP bit

Add ixgbe API to enable SBP bit in FCTRL register
to allow receiving packets that may otherwise be
considered length errors by ixgbe and dropped

Signed-off-by: Shweta Choudaha <shweta.choudaha@att.com>
Reviewed-by: Chas Williams <chas3@att.com>
Reviewed-by: Luca Boccassi <bluca@debian.org>
Acked-by: Wenzhuo Lu <wenzhuo.lu@intel.com>

diff --git a/drivers/net/ixgbe/rte_pmd_ixgbe.c b/drivers/net/ixgbe/rte_pmd_ixgbe.c
index 974c15d..3a874f9 100644 (file)
--- a/drivers/net/ixgbe/rte_pmd_ixgbe.c
+++ b/drivers/net/ixgbe/rte_pmd_ixgbe.c
@@ -881,6 +881,34 @@ rte_pmd_ixgbe_set_tc_bw_alloc(uint16_t port,
        return 0;
 }
 
+int __rte_experimental
+rte_pmd_ixgbe_upd_fctrl_sbp(uint16_t port, int enable)
+{
+       struct ixgbe_hw *hw;
+       struct rte_eth_dev *dev;
+       uint32_t fctrl;
+
+       RTE_ETH_VALID_PORTID_OR_ERR_RET(port, -ENODEV);
+       dev = &rte_eth_devices[port];
+       if (!is_ixgbe_supported(dev))
+               return -ENOTSUP;
+
+       hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+       if (!hw)
+               return -ENOTSUP;
+
+       fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
+
+       /* If 'enable' set the SBP bit else clear it */
+       if (enable)
+               fctrl |= IXGBE_FCTRL_SBP;
+       else
+               fctrl &= ~(IXGBE_FCTRL_SBP);
+
+       IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
+       return 0;
+}
+
 #ifdef RTE_LIBRTE_IXGBE_BYPASS
 int
 rte_pmd_ixgbe_bypass_init(uint16_t port_id)

diff --git a/drivers/net/ixgbe/rte_pmd_ixgbe.h b/drivers/net/ixgbe/rte_pmd_ixgbe.h
index 12c64b9..72a941f 100644 (file)
--- a/drivers/net/ixgbe/rte_pmd_ixgbe.h
+++ b/drivers/net/ixgbe/rte_pmd_ixgbe.h
@@ -708,4 +708,17 @@ enum {
        ((x) > RTE_PMD_IXGBE_BYPASS_TMT_OFF &&  \
        (x) < RTE_PMD_IXGBE_BYPASS_TMT_NUM))
 
+/**
+ * @param port
+ *   The port identifier of the Ethernet device.
+ * @param enable
+ *    0 to disable and nonzero to enable 'SBP' bit in FCTRL register
+ *    to receive all packets
+ * @return
+ *   - (0) if successful.
+ *   - (-ENODEV) if *port* invalid.
+ *   - (-ENOTSUP) if hardware doesn't support this feature.
+ */
+int __rte_experimental
+rte_pmd_ixgbe_upd_fctrl_sbp(uint16_t port, int enable);
 #endif /* _PMD_IXGBE_H_ */

diff --git a/drivers/net/ixgbe/rte_pmd_ixgbe_version.map b/drivers/net/ixgbe/rte_pmd_ixgbe_version.map
index b3eaaa2..c814f96 100644 (file)
--- a/drivers/net/ixgbe/rte_pmd_ixgbe_version.map
+++ b/drivers/net/ixgbe/rte_pmd_ixgbe_version.map
@@ -60,4 +60,5 @@ EXPERIMENTAL {
        rte_pmd_ixgbe_mdio_unlock;
        rte_pmd_ixgbe_mdio_unlocked_read;
        rte_pmd_ixgbe_mdio_unlocked_write;
+       rte_pmd_ixgbe_upd_fctrl_sbp;
 };