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ixgbe: Reduce VT code indent in set_vfta by introducing jump label 

In order to clear the way for upcoming work I thought it best to drop the
level of indent in the ixgbe_set_vfta_generic function.  Most of the code
is held in the virtualization specific section.  So the easiest approach is
to just add a jump label and jump past the bulk of the code if it is not
enabled.

Signed-off-by: Alexander Duyck <aduyck@mirantis.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Alexander Duyck 2015-11-02 17:09:48 -08:00 committed by Jeff Kirsher
parent c18fbd5f02
commit 63d9379a59
1 changed files with 68 additions and 70 deletions
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138
drivers/net/ethernet/intel/ixgbe/ixgbe_common.c
View File

@ -3051,8 +3051,8 @@ s32 ixgbe_set_vfta_generic(struct ixgbe_hw *hw, u32 vlan, u32 vind,
bool vlan_on)
{
u32 regidx, vfta_delta, vfta;
s32 vlvf_index;
u32 bits;
u32 vt;
if (vlan > 4095)
return IXGBE_ERR_PARAM;
@ -3088,83 +3088,81 @@ s32 ixgbe_set_vfta_generic(struct ixgbe_hw *hw, u32 vlan, u32 vind,
* Or !vlan_on
* clear the pool bit and possibly the vind
*/
vt = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
if (vt & IXGBE_VT_CTL_VT_ENABLE) {
s32 vlvf_index;
if (!(IXGBE_READ_REG(hw, IXGBE_VT_CTL) & IXGBE_VT_CTL_VT_ENABLE))
goto vfta_update;
vlvf_index = ixgbe_find_vlvf_slot(hw, vlan);
if (vlvf_index < 0)
return vlvf_index;
vlvf_index = ixgbe_find_vlvf_slot(hw, vlan);
if (vlvf_index < 0)
return vlvf_index;
if (vlan_on) {
/* set the pool bit */
if (vind < 32) {
bits = IXGBE_READ_REG(hw,
IXGBE_VLVFB(vlvf_index*2));
bits |= (1 << vind);
IXGBE_WRITE_REG(hw,
IXGBE_VLVFB(vlvf_index*2),
bits);
} else {
bits = IXGBE_READ_REG(hw,
IXGBE_VLVFB((vlvf_index*2)+1));
bits |= (1 << (vind-32));
IXGBE_WRITE_REG(hw,
IXGBE_VLVFB((vlvf_index*2)+1),
bits);
}
if (vlan_on) {
/* set the pool bit */
if (vind < 32) {
bits = IXGBE_READ_REG(hw,
IXGBE_VLVFB(vlvf_index*2));
bits |= (1 << vind);
IXGBE_WRITE_REG(hw,
IXGBE_VLVFB(vlvf_index*2),
bits);
} else {
/* clear the pool bit */
if (vind < 32) {
bits = IXGBE_READ_REG(hw,
IXGBE_VLVFB(vlvf_index*2));
bits &= ~(1 << vind);
IXGBE_WRITE_REG(hw,
IXGBE_VLVFB(vlvf_index*2),
bits);
bits |= IXGBE_READ_REG(hw,
IXGBE_VLVFB((vlvf_index*2)+1));
} else {
bits = IXGBE_READ_REG(hw,
IXGBE_VLVFB((vlvf_index*2)+1));
bits &= ~(1 << (vind-32));
IXGBE_WRITE_REG(hw,
IXGBE_VLVFB((vlvf_index*2)+1),
bits);
bits |= IXGBE_READ_REG(hw,
IXGBE_VLVFB(vlvf_index*2));
}
bits = IXGBE_READ_REG(hw,
IXGBE_VLVFB((vlvf_index*2)+1));
bits |= (1 << (vind-32));
IXGBE_WRITE_REG(hw,
IXGBE_VLVFB((vlvf_index*2)+1),
bits);
}
/*
* If there are still bits set in the VLVFB registers
* for the VLAN ID indicated we need to see if the
* caller is requesting that we clear the VFTA entry bit.
* If the caller has requested that we clear the VFTA
* entry bit but there are still pools/VFs using this VLAN
* ID entry then ignore the request. We're not worried
* about the case where we're turning the VFTA VLAN ID
* entry bit on, only when requested to turn it off as
* there may be multiple pools and/or VFs using the
* VLAN ID entry. In that case we cannot clear the
* VFTA bit until all pools/VFs using that VLAN ID have also
* been cleared. This will be indicated by "bits" being
* zero.
*/
if (bits) {
IXGBE_WRITE_REG(hw, IXGBE_VLVF(vlvf_index),
(IXGBE_VLVF_VIEN | vlan));
/* if someone wants to clear the vfta entry but
* some pools/VFs are still using it. Ignore it.
*/
if (!vlan_on)
vfta_delta = 0;
} else {
/* clear the pool bit */
if (vind < 32) {
bits = IXGBE_READ_REG(hw,
IXGBE_VLVFB(vlvf_index*2));
bits &= ~(1 << vind);
IXGBE_WRITE_REG(hw,
IXGBE_VLVFB(vlvf_index*2),
bits);
bits |= IXGBE_READ_REG(hw,
IXGBE_VLVFB((vlvf_index*2)+1));
} else {
IXGBE_WRITE_REG(hw, IXGBE_VLVF(vlvf_index), 0);
bits = IXGBE_READ_REG(hw,
IXGBE_VLVFB((vlvf_index*2)+1));
bits &= ~(1 << (vind-32));
IXGBE_WRITE_REG(hw,
IXGBE_VLVFB((vlvf_index*2)+1),
bits);
bits |= IXGBE_READ_REG(hw,
IXGBE_VLVFB(vlvf_index*2));
}
}
/* If there are still bits set in the VLVFB registers
* for the VLAN ID indicated we need to see if the
* caller is requesting that we clear the VFTA entry bit.
* If the caller has requested that we clear the VFTA
* entry bit but there are still pools/VFs using this VLAN
* ID entry then ignore the request. We're not worried
* about the case where we're turning the VFTA VLAN ID
* entry bit on, only when requested to turn it off as
* there may be multiple pools and/or VFs using the
* VLAN ID entry. In that case we cannot clear the
* VFTA bit until all pools/VFs using that VLAN ID have also
* been cleared. This will be indicated by "bits" being
* zero.
*/
if (bits) {
IXGBE_WRITE_REG(hw, IXGBE_VLVF(vlvf_index),
(IXGBE_VLVF_VIEN | vlan));
/* if someone wants to clear the vfta entry but
* some pools/VFs are still using it. Ignore it.
*/
if (!vlan_on)
vfta_delta = 0;
} else {
IXGBE_WRITE_REG(hw, IXGBE_VLVF(vlvf_index), 0);
}
vfta_update:
if (vfta_delta)
IXGBE_WRITE_REG(hw, IXGBE_VFTA(regidx), vfta);