[dpdk-dev] [PATCH] igb: handle VF LPE mailbox message

[Sergio Gonzalez Monroy]

This patch adds the handle function for the LPE mailbox message (VF to
PF) to set maximum packet size, which can be used to enable jumbo
frame support.

Signed-off-by: Sergio Gonzalez Monroy <sergio.gonzalez.monroy at intel.com>
---
 lib/librte_pmd_e1000/igb_pf.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/lib/librte_pmd_e1000/igb_pf.c b/lib/librte_pmd_e1000/igb_pf.c
index bc3816a..2d49379 100644
--- a/lib/librte_pmd_e1000/igb_pf.c
+++ b/lib/librte_pmd_e1000/igb_pf.c
@@ -395,6 +395,31 @@ igb_vf_set_vlan(struct rte_eth_dev *dev, uint32_t vf, 
uint32_t *msgbuf)
 }

 static int
+igb_vf_set_rlpml(struct rte_eth_dev *dev, uint32_t vf, uint32_t *msgbuf)
+{
+       struct e1000_hw *hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+       uint16_t rlpml = msgbuf[1] & E1000_VMOLR_RLPML_MASK;
+       uint32_t max_frame = rlpml + ETHER_HDR_LEN + ETHER_CRC_LEN;
+       uint32_t vmolr;
+
+       if ((max_frame < ETHER_MIN_LEN) || (max_frame > 
ETHER_MAX_JUMBO_FRAME_LEN))
+               return -1;
+
+       vmolr = E1000_READ_REG(hw, E1000_VMOLR(vf));
+
+       vmolr &= ~E1000_VMOLR_RLPML_MASK;
+       vmolr |= rlpml;
+
+       /* Enable Long Packet support */
+       vmolr |= E1000_VMOLR_LPE;
+
+       E1000_WRITE_REG(hw, E1000_VMOLR(vf), vmolr);
+       E1000_WRITE_FLUSH(hw);
+
+       return 0;
+}
+
+static int
 igb_rcv_msg_from_vf(struct rte_eth_dev *dev, uint16_t vf)
 {
        uint16_t mbx_size = E1000_VFMAILBOX_SIZE;
@@ -428,6 +453,9 @@ igb_rcv_msg_from_vf(struct rte_eth_dev *dev, uint16_t vf)
        case E1000_VF_SET_MULTICAST:
                retval = igb_vf_set_multicast(dev, vf, msgbuf);
                break;
+       case E1000_VF_SET_LPE:
+               retval = igb_vf_set_rlpml(dev, vf, msgbuf);
+               break;
        case E1000_VF_SET_VLAN:
                retval = igb_vf_set_vlan(dev, vf, msgbuf);
                break;
-- 
1.9.3