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ethtool, ixgbe: Move RX n-tuple mask fixup to ethtool

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The ethtool utility does not set masks for flow parameters that are
not specified, so if both value and mask are 0 then this must be
treated as equivalent to a mask with all bits set.  Currently that is
done in the only driver that implements RX n-tuple filtering, ixgbe.
Move it to the ethtool core.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ben Hutchings 2010-09-16 11:28:07 +00:00 committed by David S. Miller
parent 3b27e10555
commit be2902daee
3 changed files with 51 additions and 45 deletions
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57
drivers/net/ixgbe/ixgbe_82599.c
View File

@ -1910,56 +1910,27 @@ s32 ixgbe_fdir_add_perfect_filter_82599(struct ixgbe_hw *hw,
(dst_port << IXGBE_FDIRPORT_DESTINATION_SHIFT)));
/*
* Program the relevant mask registers. If src/dst_port or src/dst_addr
* are zero, then assume a full mask for that field. Also assume that
* a VLAN of 0 is unspecified, so mask that out as well. L4type
* cannot be masked out in this implementation.
* Program the relevant mask registers. L4type cannot be
* masked out in this implementation.
*
* This also assumes IPv4 only. IPv6 masking isn't supported at this
* point in time.
*/
if (src_ipv4 == 0)
IXGBE_WRITE_REG(hw, IXGBE_FDIRSIP4M, 0xffffffff);
else
IXGBE_WRITE_REG(hw, IXGBE_FDIRSIP4M, input_masks->src_ip_mask);
if (dst_ipv4 == 0)
IXGBE_WRITE_REG(hw, IXGBE_FDIRDIP4M, 0xffffffff);
else
IXGBE_WRITE_REG(hw, IXGBE_FDIRDIP4M, input_masks->dst_ip_mask);
IXGBE_WRITE_REG(hw, IXGBE_FDIRSIP4M, input_masks->src_ip_mask);
IXGBE_WRITE_REG(hw, IXGBE_FDIRDIP4M, input_masks->dst_ip_mask);
switch (l4type & IXGBE_ATR_L4TYPE_MASK) {
case IXGBE_ATR_L4TYPE_TCP:
if (src_port == 0)
IXGBE_WRITE_REG(hw, IXGBE_FDIRTCPM, 0xffff);
else
IXGBE_WRITE_REG(hw, IXGBE_FDIRTCPM,
input_masks->src_port_mask);
if (dst_port == 0)
IXGBE_WRITE_REG(hw, IXGBE_FDIRTCPM,
(IXGBE_READ_REG(hw, IXGBE_FDIRTCPM) |
(0xffff << 16)));
else
IXGBE_WRITE_REG(hw, IXGBE_FDIRTCPM,
(IXGBE_READ_REG(hw, IXGBE_FDIRTCPM) |
(input_masks->dst_port_mask << 16)));
IXGBE_WRITE_REG(hw, IXGBE_FDIRTCPM, input_masks->src_port_mask);
IXGBE_WRITE_REG(hw, IXGBE_FDIRTCPM,
(IXGBE_READ_REG(hw, IXGBE_FDIRTCPM) |
(input_masks->dst_port_mask << 16)));
break;
case IXGBE_ATR_L4TYPE_UDP:
if (src_port == 0)
IXGBE_WRITE_REG(hw, IXGBE_FDIRUDPM, 0xffff);
else
IXGBE_WRITE_REG(hw, IXGBE_FDIRUDPM,
input_masks->src_port_mask);
if (dst_port == 0)
IXGBE_WRITE_REG(hw, IXGBE_FDIRUDPM,
(IXGBE_READ_REG(hw, IXGBE_FDIRUDPM) |
(0xffff << 16)));
else
IXGBE_WRITE_REG(hw, IXGBE_FDIRUDPM,
(IXGBE_READ_REG(hw, IXGBE_FDIRUDPM) |
(input_masks->src_port_mask << 16)));
IXGBE_WRITE_REG(hw, IXGBE_FDIRUDPM, input_masks->src_port_mask);
IXGBE_WRITE_REG(hw, IXGBE_FDIRUDPM,
(IXGBE_READ_REG(hw, IXGBE_FDIRUDPM) |
(input_masks->src_port_mask << 16)));
break;
default:
/* this already would have failed above */
@ -1967,11 +1938,11 @@ s32 ixgbe_fdir_add_perfect_filter_82599(struct ixgbe_hw *hw,
}
/* Program the last mask register, FDIRM */
if (input_masks->vlan_id_mask || !vlan_id)
if (input_masks->vlan_id_mask)
/* Mask both VLAN and VLANP - bits 0 and 1 */
fdirm |= 0x3;
if (input_masks->data_mask || !flex_bytes)
if (input_masks->data_mask)
/* Flex bytes need masking, so mask the whole thing - bit 4 */
fdirm |= 0x10;

5
include/linux/ethtool.h
View File

@ -470,8 +470,9 @@ struct ethtool_rxfh_indir {
* @action: RX ring/queue index to deliver to (non-negative) or other action
* (negative, e.g. %ETHTOOL_RXNTUPLE_ACTION_DROP)
*
* Zero values in @h_u may be ignored, as if all the corresponding
* mask bits were set.
* For flow types %TCP_V4_FLOW, %UDP_V4_FLOW and %SCTP_V4_FLOW, where
* a field value and mask are both zero this is treated as if all mask
* bits are set i.e. the field is ignored.
*/
struct ethtool_rx_ntuple_flow_spec {
__u32 flow_type;

34
net/core/ethtool.c
View File

@ -485,6 +485,38 @@ static void __rx_ntuple_filter_add(struct ethtool_rx_ntuple_list *list,
list->count++;
}
/*
* ethtool does not (or did not) set masks for flow parameters that are
* not specified, so if both value and mask are 0 then this must be
* treated as equivalent to a mask with all bits set. Implement that
* here rather than in drivers.
*/
static void rx_ntuple_fix_masks(struct ethtool_rx_ntuple_flow_spec *fs)
{
struct ethtool_tcpip4_spec *entry = &fs->h_u.tcp_ip4_spec;
struct ethtool_tcpip4_spec *mask = &fs->m_u.tcp_ip4_spec;
if (fs->flow_type != TCP_V4_FLOW &&
fs->flow_type != UDP_V4_FLOW &&
fs->flow_type != SCTP_V4_FLOW)
return;
if (!(entry->ip4src | mask->ip4src))
mask->ip4src = htonl(0xffffffff);
if (!(entry->ip4dst | mask->ip4dst))
mask->ip4dst = htonl(0xffffffff);
if (!(entry->psrc | mask->psrc))
mask->psrc = htons(0xffff);
if (!(entry->pdst | mask->pdst))
mask->pdst = htons(0xffff);
if (!(entry->tos | mask->tos))
mask->tos = 0xff;
if (!(fs->vlan_tag | fs->vlan_tag_mask))
fs->vlan_tag_mask = 0xffff;
if (!(fs->data | fs->data_mask))
fs->data_mask = 0xffffffffffffffffULL;
}
static noinline_for_stack int ethtool_set_rx_ntuple(struct net_device *dev,
void __user *useraddr)
{
@ -499,6 +531,8 @@ static noinline_for_stack int ethtool_set_rx_ntuple(struct net_device *dev,
if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
return -EFAULT;
rx_ntuple_fix_masks(&cmd.fs);
/*
* Cache filter in dev struct for GET operation only if
* the underlying driver doesn't have its own GET operation, and