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ixgbe: Add support for enabling UDP RSS via the ethtool rx-flow-hash command

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This patch adds support for enabling or disabling UDP RSS via the
ethtool -N rx-flow-hash command.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Stephen Ko <stephen.s.ko@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Alexander Duyck 2012-02-08 07:51:53 +00:00 committed by Jeff Kirsher
parent 581330ba7b
commit ef6afc0cac
3 changed files with 160 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/ethernet/intel/ixgbe/ixgbe.h
View File

@ -438,7 +438,8 @@ struct ixgbe_adapter {
#define IXGBE_FLAG2_SFP_NEEDS_RESET (u32)(1 << 5)
#define IXGBE_FLAG2_RESET_REQUESTED (u32)(1 << 6)
#define IXGBE_FLAG2_FDIR_REQUIRES_REINIT (u32)(1 << 7)
#define IXGBE_FLAG2_RSS_FIELD_IPV4_UDP (u32)(1 << 8)
#define IXGBE_FLAG2_RSS_FIELD_IPV6_UDP (u32)(1 << 9)
/* Tx fast path data */
int num_tx_queues;

153
drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
View File

@ -2328,6 +2328,48 @@ static int ixgbe_get_ethtool_fdir_all(struct ixgbe_adapter *adapter,
return 0;
}
static int ixgbe_get_rss_hash_opts(struct ixgbe_adapter *adapter,
struct ethtool_rxnfc *cmd)
{
cmd->data = 0;
/* if RSS is disabled then report no hashing */
if (!(adapter->flags & IXGBE_FLAG_RSS_ENABLED))
return 0;
/* Report default options for RSS on ixgbe */
switch (cmd->flow_type) {
case TCP_V4_FLOW:
cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
case UDP_V4_FLOW:
if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV4_UDP)
cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
case SCTP_V4_FLOW:
case AH_ESP_V4_FLOW:
case AH_V4_FLOW:
case ESP_V4_FLOW:
case IPV4_FLOW:
cmd->data |= RXH_IP_SRC | RXH_IP_DST;
break;
case TCP_V6_FLOW:
cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
case UDP_V6_FLOW:
if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV6_UDP)
cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
case SCTP_V6_FLOW:
case AH_ESP_V6_FLOW:
case AH_V6_FLOW:
case ESP_V6_FLOW:
case IPV6_FLOW:
cmd->data |= RXH_IP_SRC | RXH_IP_DST;
break;
default:
return -EINVAL;
}
return 0;
}
static int ixgbe_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
u32 *rule_locs)
{
@ -2349,6 +2391,9 @@ static int ixgbe_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
case ETHTOOL_GRXCLSRLALL:
ret = ixgbe_get_ethtool_fdir_all(adapter, cmd, rule_locs);
break;
case ETHTOOL_GRXFH:
ret = ixgbe_get_rss_hash_opts(adapter, cmd);
break;
default:
break;
}
@ -2583,6 +2628,111 @@ static int ixgbe_del_ethtool_fdir_entry(struct ixgbe_adapter *adapter,
return err;
}
#define UDP_RSS_FLAGS (IXGBE_FLAG2_RSS_FIELD_IPV4_UDP | \
IXGBE_FLAG2_RSS_FIELD_IPV6_UDP)
static int ixgbe_set_rss_hash_opt(struct ixgbe_adapter *adapter,
struct ethtool_rxnfc *nfc)
{
u32 flags2 = adapter->flags2;
/*
* RSS does not support anything other than hashing
* to queues on src and dst IPs and ports
*/
if (nfc->data & ~(RXH_IP_SRC | RXH_IP_DST |
RXH_L4_B_0_1 | RXH_L4_B_2_3))
return -EINVAL;
switch (nfc->flow_type) {
case TCP_V4_FLOW:
case TCP_V6_FLOW:
if (!(nfc->data & RXH_IP_SRC) ||
!(nfc->data & RXH_IP_DST) ||
!(nfc->data & RXH_L4_B_0_1) ||
!(nfc->data & RXH_L4_B_2_3))
return -EINVAL;
break;
case UDP_V4_FLOW:
if (!(nfc->data & RXH_IP_SRC) ||
!(nfc->data & RXH_IP_DST))
return -EINVAL;
switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) {
case 0:
flags2 &= ~IXGBE_FLAG2_RSS_FIELD_IPV4_UDP;
break;
case (RXH_L4_B_0_1 | RXH_L4_B_2_3):
flags2 |= IXGBE_FLAG2_RSS_FIELD_IPV4_UDP;
break;
default:
return -EINVAL;
}
break;
case UDP_V6_FLOW:
if (!(nfc->data & RXH_IP_SRC) ||
!(nfc->data & RXH_IP_DST))
return -EINVAL;
switch (nfc->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3)) {
case 0:
flags2 &= ~IXGBE_FLAG2_RSS_FIELD_IPV6_UDP;
break;
case (RXH_L4_B_0_1 | RXH_L4_B_2_3):
flags2 |= IXGBE_FLAG2_RSS_FIELD_IPV6_UDP;
break;
default:
return -EINVAL;
}
break;
case AH_ESP_V4_FLOW:
case AH_V4_FLOW:
case ESP_V4_FLOW:
case SCTP_V4_FLOW:
case AH_ESP_V6_FLOW:
case AH_V6_FLOW:
case ESP_V6_FLOW:
case SCTP_V6_FLOW:
if (!(nfc->data & RXH_IP_SRC) ||
!(nfc->data & RXH_IP_DST) ||
(nfc->data & RXH_L4_B_0_1) ||
(nfc->data & RXH_L4_B_2_3))
return -EINVAL;
break;
default:
return -EINVAL;
}
/* if we changed something we need to update flags */
if (flags2 != adapter->flags2) {
struct ixgbe_hw *hw = &adapter->hw;
u32 mrqc = IXGBE_READ_REG(hw, IXGBE_MRQC);
if ((flags2 & UDP_RSS_FLAGS) &&
!(adapter->flags2 & UDP_RSS_FLAGS))
e_warn(drv, "enabling UDP RSS: fragmented packets"
" may arrive out of order to the stack above\n");
adapter->flags2 = flags2;
/* Perform hash on these packet types */
mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4
| IXGBE_MRQC_RSS_FIELD_IPV4_TCP
| IXGBE_MRQC_RSS_FIELD_IPV6
| IXGBE_MRQC_RSS_FIELD_IPV6_TCP;
mrqc &= ~(IXGBE_MRQC_RSS_FIELD_IPV4_UDP |
IXGBE_MRQC_RSS_FIELD_IPV6_UDP);
if (flags2 & IXGBE_FLAG2_RSS_FIELD_IPV4_UDP)
mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4_UDP;
if (flags2 & IXGBE_FLAG2_RSS_FIELD_IPV6_UDP)
mrqc |= IXGBE_MRQC_RSS_FIELD_IPV6_UDP;
IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
}
return 0;
}
static int ixgbe_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
{
struct ixgbe_adapter *adapter = netdev_priv(dev);
@ -2595,6 +2745,9 @@ static int ixgbe_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
case ETHTOOL_SRXCLSRLDEL:
ret = ixgbe_del_ethtool_fdir_entry(adapter, cmd);
break;
case ETHTOOL_SRXFH:
ret = ixgbe_set_rss_hash_opt(adapter, cmd);
break;
default:
break;
}

5
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
View File

@ -2856,6 +2856,11 @@ static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
| IXGBE_MRQC_RSS_FIELD_IPV6
| IXGBE_MRQC_RSS_FIELD_IPV6_TCP;
if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV4_UDP)
mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4_UDP;
if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV6_UDP)
mrqc |= IXGBE_MRQC_RSS_FIELD_IPV6_UDP;
IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
}