Commit 9295edb4 authored by Emil Tantilov's avatar Emil Tantilov Committed by Jeff Kirsher
Browse files

ixgbevf: add RSS support for X550 



X550 provides RSS registers for configuring RSS per VF.

This patch introduces ixgbevf_setup_vfmrqc() which uses the VFRETA,
VFRSSRK and VFMRQC registers to configure RSS on X550.

Signed-off-by: default avatarEmil Tantilov <emil.s.tantilov@intel.com>
Tested-by: default avatarKrishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 2dc571aa

drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c

+35 −0
Original line number Diff line number Diff line
@@ -1584,6 +1584,39 @@ static void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter, 
		       reg_idx);

}



static void ixgbevf_setup_vfmrqc(struct ixgbevf_adapter *adapter)

{

	struct ixgbe_hw *hw = &adapter->hw;

	u32 vfmrqc = 0, vfreta = 0;

	u32 rss_key[10];

	u16 rss_i = adapter->num_rx_queues;

	int i, j;



	/* Fill out hash function seeds */

	netdev_rss_key_fill(rss_key, sizeof(rss_key));

	for (i = 0; i < 10; i++)

		IXGBE_WRITE_REG(hw, IXGBE_VFRSSRK(i), rss_key[i]);



	/* Fill out redirection table */

	for (i = 0, j = 0; i < 64; i++, j++) {

		if (j == rss_i)

			j = 0;

		vfreta = (vfreta << 8) | (j * 0x1);

		if ((i & 3) == 3)

			IXGBE_WRITE_REG(hw, IXGBE_VFRETA(i >> 2), vfreta);

	}



	/* Perform hash on these packet types */

	vfmrqc |= IXGBE_VFMRQC_RSS_FIELD_IPV4 |

		IXGBE_VFMRQC_RSS_FIELD_IPV4_TCP |

		IXGBE_VFMRQC_RSS_FIELD_IPV6 |

		IXGBE_VFMRQC_RSS_FIELD_IPV6_TCP;



	vfmrqc |= IXGBE_VFMRQC_RSSEN;



	IXGBE_WRITE_REG(hw, IXGBE_VFMRQC, vfmrqc);

}



static void ixgbevf_configure_rx_ring(struct ixgbevf_adapter *adapter,

				      struct ixgbevf_ring *ring)

{
@@ -1640,6 +1673,8 @@ static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter) 
	struct net_device *netdev = adapter->netdev;



	ixgbevf_setup_psrtype(adapter);

	if (hw->mac.type >= ixgbe_mac_X550_vf)

		ixgbevf_setup_vfmrqc(adapter);



	/* notify the PF of our intent to use this size of frame */

	ixgbevf_rlpml_set_vf(hw, netdev->mtu + ETH_HLEN + ETH_FCS_LEN);

drivers/net/ethernet/intel/ixgbevf/regs.h

+10 −0
Original line number Diff line number Diff line
@@ -69,6 +69,16 @@ 
#define IXGBE_VFGOTC_LSB       0x02020

#define IXGBE_VFGOTC_MSB       0x02024

#define IXGBE_VFMPRC           0x01034

#define IXGBE_VFMRQC           0x3000

#define IXGBE_VFRSSRK(x)       (0x3100 + ((x) * 4))

#define IXGBE_VFRETA(x)        (0x3200 + ((x) * 4))



/* VFMRQC bits */

#define IXGBE_VFMRQC_RSSEN              0x00000001  /* RSS Enable */

#define IXGBE_VFMRQC_RSS_FIELD_IPV4_TCP 0x00010000

#define IXGBE_VFMRQC_RSS_FIELD_IPV4     0x00020000

#define IXGBE_VFMRQC_RSS_FIELD_IPV6     0x00100000

#define IXGBE_VFMRQC_RSS_FIELD_IPV6_TCP 0x00200000



#define IXGBE_WRITE_FLUSH(a) (IXGBE_READ_REG(a, IXGBE_VFSTATUS))

CRA Git | Maintained and supported by SUSTech CRA and CCSE