From a3417d287fb02e7bd24c6b1068fe6f9b52a259a6 Mon Sep 17 00:00:00 2001 From: Jacob Keller Date: Tue, 6 Sep 2016 18:05:10 -0700 Subject: [PATCH] i40e: check conflicting ntuple/sideband rules when re-enabling ATR In i40e_fdir_check_and_reenable(), the driver performs some checks to determine whether it is safe to re-enable FD Sideband and FD ATR support. The current check will only determine if there is available space in the flow director table. However, this ignores the fact that ATR should be disabled when there are TCP/IPv4 sideband rules in effect. Add the missing check, and update the info message printed when I40E_DEBUG_FD is enabled. Change-ID: Ibb9c63e5be95d63c53a498fdd5dbf69f54a00e08 Signed-off-by: Jacob Keller Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40e/i40e_main.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index e1a2c9a..89b0418 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -5939,13 +5939,17 @@ void i40e_fdir_check_and_reenable(struct i40e_pf *pf) dev_info(&pf->pdev->dev, "FD Sideband/ntuple is being enabled since we have space in the table now\n"); } } - /* Wait for some more space to be available to turn on ATR */ + + /* Wait for some more space to be available to turn on ATR. We also + * must check that no existing ntuple rules for TCP are in effect + */ if (fcnt_prog < (fcnt_avail - I40E_FDIR_BUFFER_HEAD_ROOM * 2)) { 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->fd_tcp_rule == 0)) { pf->auto_disable_flags &= ~I40E_FLAG_FD_ATR_ENABLED; if (I40E_DEBUG_FD & pf->hw.debug_mask) - dev_info(&pf->pdev->dev, "ATR is being enabled since we have space in the table now\n"); + dev_info(&pf->pdev->dev, "ATR is being enabled since we have space in the table and there are no conflicting ntuple rules\n"); } } -- 2.7.4