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i40e: cleanup ATR auto_disable_flags use
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Some locations that disable ATR accidentally used the "full" disable by
disabling the flag in the standard flags field. This incorrectly forces
ATR off permanently instead of temporarily disabling it. In addition,
some code locations accidentally set the ATR flag enabled when they only
meant to clear the auto_disable_flags. This results in ignoring the
user's ethtool private flag settings.

Additionally, when disabling ATR via ethtool, we did not perform a flush
of the FD table. This results in the previously assigned ATR rules still
functioning which was not expected.

Cleanup all these areas so that automatic disable uses only the
auto_disable_flag. Fix the flush code so that we can trigger a flush
even when we've disabled ATR and SB support, as otherwise the flush
doesn't work. Fix ethtool setting to actually request a flush. Fix
NETIF_F_NTUPLE flag to only clear the auto_disable setting and not
enable the full feature.

Change-ID: Ib2486111f8031bd16943e9308757b276305c03b5
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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Jacob Keller authored and Jeff Kirsher committed Sep 25, 2016
1 parent 2199254 commit 234dc4e
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Showing 3 changed files with 17 additions and 20 deletions.
3 changes: 3 additions & 0 deletions drivers/net/ethernet/intel/i40e/i40e_ethtool.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3021,6 +3021,9 @@ static int i40e_set_priv_flags(struct net_device *dev, u32 flags)
} else {
pf->flags &= ~I40E_FLAG_FD_ATR_ENABLED;
pf->auto_disable_flags |= I40E_FLAG_FD_ATR_ENABLED;

/* flush current ATR settings */
set_bit(__I40E_FD_FLUSH_REQUESTED, &pf->state);
}

if ((flags & I40E_PRIV_FLAGS_VEB_STATS) &&
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20 changes: 7 additions & 13 deletions drivers/net/ethernet/intel/i40e/i40e_main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -5242,7 +5242,7 @@ static int i40e_up_complete(struct i40e_vsi *vsi)
/* reset fd counters */
pf->fd_add_err = pf->fd_atr_cnt = 0;
if (pf->fd_tcp_rule > 0) {
pf->flags &= ~I40E_FLAG_FD_ATR_ENABLED;
pf->auto_disable_flags |= I40E_FLAG_FD_ATR_ENABLED;
if (I40E_DEBUG_FD & pf->hw.debug_mask)
dev_info(&pf->pdev->dev, "Forcing ATR off, sideband rules for TCP/IPv4 exist\n");
pf->fd_tcp_rule = 0;
Expand Down Expand Up @@ -5976,9 +5976,6 @@ static void i40e_fdir_flush_and_replay(struct i40e_pf *pf)
int fd_room;
int reg;

if (!(pf->flags & (I40E_FLAG_FD_SB_ENABLED | I40E_FLAG_FD_ATR_ENABLED)))
return;

if (!time_after(jiffies, pf->fd_flush_timestamp +
(I40E_MIN_FD_FLUSH_INTERVAL * HZ)))
return;
Expand All @@ -5998,7 +5995,7 @@ static void i40e_fdir_flush_and_replay(struct i40e_pf *pf)
}

pf->fd_flush_timestamp = jiffies;
pf->flags &= ~I40E_FLAG_FD_ATR_ENABLED;
pf->auto_disable_flags |= I40E_FLAG_FD_ATR_ENABLED;
/* flush all filters */
wr32(&pf->hw, I40E_PFQF_CTL_1,
I40E_PFQF_CTL_1_CLEARFDTABLE_MASK);
Expand All @@ -6018,7 +6015,7 @@ static void i40e_fdir_flush_and_replay(struct i40e_pf *pf)
/* replay sideband filters */
i40e_fdir_filter_restore(pf->vsi[pf->lan_vsi]);
if (!disable_atr)
pf->flags |= I40E_FLAG_FD_ATR_ENABLED;
pf->auto_disable_flags &= ~I40E_FLAG_FD_ATR_ENABLED;
clear_bit(__I40E_FD_FLUSH_REQUESTED, &pf->state);
if (I40E_DEBUG_FD & pf->hw.debug_mask)
dev_info(&pf->pdev->dev, "FD Filter table flushed and FD-SB replayed.\n");
Expand Down Expand Up @@ -6052,9 +6049,6 @@ static void i40e_fdir_reinit_subtask(struct i40e_pf *pf)
if (test_bit(__I40E_DOWN, &pf->state))
return;

if (!(pf->flags & (I40E_FLAG_FD_SB_ENABLED | I40E_FLAG_FD_ATR_ENABLED)))
return;

if (test_bit(__I40E_FD_FLUSH_REQUESTED, &pf->state))
i40e_fdir_flush_and_replay(pf);

Expand Down Expand Up @@ -8682,13 +8676,13 @@ bool i40e_set_ntuple(struct i40e_pf *pf, netdev_features_t features)
/* reset fd counters */
pf->fd_add_err = pf->fd_atr_cnt = pf->fd_tcp_rule = 0;
pf->fdir_pf_active_filters = 0;
pf->flags |= I40E_FLAG_FD_ATR_ENABLED;
if (I40E_DEBUG_FD & pf->hw.debug_mask)
dev_info(&pf->pdev->dev, "ATR re-enabled.\n");
/* if ATR was auto disabled it can be re-enabled. */
if ((pf->flags & I40E_FLAG_FD_ATR_ENABLED) &&
(pf->auto_disable_flags & I40E_FLAG_FD_ATR_ENABLED))
(pf->auto_disable_flags & I40E_FLAG_FD_ATR_ENABLED)) {
pf->auto_disable_flags &= ~I40E_FLAG_FD_ATR_ENABLED;
if (I40E_DEBUG_FD & pf->hw.debug_mask)
dev_info(&pf->pdev->dev, "ATR re-enabled.\n");
}
}
return need_reset;
}
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14 changes: 7 additions & 7 deletions drivers/net/ethernet/intel/i40e/i40e_txrx.c
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Original file line number Diff line number Diff line change
Expand Up @@ -282,18 +282,18 @@ static int i40e_add_del_fdir_tcpv4(struct i40e_vsi *vsi,

if (add) {
pf->fd_tcp_rule++;
if (pf->flags & I40E_FLAG_FD_ATR_ENABLED) {
if (I40E_DEBUG_FD & pf->hw.debug_mask)
dev_info(&pf->pdev->dev, "Forcing ATR off, sideband rules for TCP/IPv4 flow being applied\n");
pf->flags &= ~I40E_FLAG_FD_ATR_ENABLED;
}
if ((pf->flags & I40E_FLAG_FD_ATR_ENABLED) &&
I40E_DEBUG_FD & pf->hw.debug_mask)
dev_info(&pf->pdev->dev, "Forcing ATR off, sideband rules for TCP/IPv4 flow being applied\n");
pf->auto_disable_flags |= I40E_FLAG_FD_ATR_ENABLED;
} else {
pf->fd_tcp_rule = (pf->fd_tcp_rule > 0) ?
(pf->fd_tcp_rule - 1) : 0;
if (pf->fd_tcp_rule == 0) {
pf->flags |= I40E_FLAG_FD_ATR_ENABLED;
if (I40E_DEBUG_FD & pf->hw.debug_mask)
if ((pf->flags & I40E_FLAG_FD_ATR_ENABLED) &&
I40E_DEBUG_FD & pf->hw.debug_mask)
dev_info(&pf->pdev->dev, "ATR re-enabled due to no sideband TCP/IPv4 rules\n");
pf->auto_disable_flags &= ~I40E_FLAG_FD_ATR_ENABLED;
}
}

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