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authorCarolyn Wyborny <carolyn.wyborny@intel.com>2015-08-27 18:42:38 +0300
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2015-10-09 01:24:28 +0300
commit3487b6c30c0dd2204dc31e14330097dff02d9a58 (patch)
tree932ad55f404537b4b7ed62683cc2fb90af1ba5db
parent1a9375eb7f987e9338c17504dd2b358b688b32d8 (diff)
downloadlinux-3487b6c30c0dd2204dc31e14330097dff02d9a58.tar.xz
i40e: Fix for extra Flow Director filter in table after error
This patch fixes a problem where the PF's fdir filter table would have an entry that the hw was unable to add. This notification happens in the hot path, so instead of trying to fix it then, we note the location in the failure case and delete it during regular fdir subtask callback. Without this patch, a case can occur where an invalid entry gets replayed and a valid one is not. Change-ID: I67831c183b5d0309876de807cc434809b74c9cb7 Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com> Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
-rw-r--r--drivers/net/ethernet/intel/i40e/i40e.h1
-rw-r--r--drivers/net/ethernet/intel/i40e/i40e_main.c14
-rw-r--r--drivers/net/ethernet/intel/i40e/i40e_txrx.c3
3 files changed, 17 insertions, 1 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index 7a3c93972356..a662e3961951 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -410,6 +410,7 @@ struct i40e_pf {
u32 npar_min_bw;
u32 ioremap_len;
+ u32 fd_inv;
};
struct i40e_mac_filter {
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 2c5921483dc8..949535684fa9 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -5614,7 +5614,9 @@ u32 i40e_get_global_fd_count(struct i40e_pf *pf)
**/
void i40e_fdir_check_and_reenable(struct i40e_pf *pf)
{
+ struct i40e_fdir_filter *filter;
u32 fcnt_prog, fcnt_avail;
+ struct hlist_node *node;
if (test_bit(__I40E_FD_FLUSH_REQUESTED, &pf->state))
return;
@@ -5643,6 +5645,18 @@ void i40e_fdir_check_and_reenable(struct i40e_pf *pf)
dev_info(&pf->pdev->dev, "ATR is being enabled since we have space in the table now\n");
}
}
+
+ /* if hw had a problem adding a filter, delete it */
+ if (pf->fd_inv > 0) {
+ hlist_for_each_entry_safe(filter, node,
+ &pf->fdir_filter_list, fdir_node) {
+ if (filter->fd_id == pf->fd_inv) {
+ hlist_del(&filter->fdir_node);
+ kfree(filter);
+ pf->fdir_pf_active_filters--;
+ }
+ }
+ }
}
#define I40E_MIN_FD_FLUSH_INTERVAL 10
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
index 889ed10f588b..8ab7ab1623f2 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
@@ -465,10 +465,11 @@ static void i40e_fd_handle_status(struct i40e_ring *rx_ring,
I40E_RX_PROG_STATUS_DESC_QW1_ERROR_SHIFT;
if (error == BIT(I40E_RX_PROG_STATUS_DESC_FD_TBL_FULL_SHIFT)) {
+ pf->fd_inv = le32_to_cpu(rx_desc->wb.qword0.hi_dword.fd_id);
if ((rx_desc->wb.qword0.hi_dword.fd_id != 0) ||
(I40E_DEBUG_FD & pf->hw.debug_mask))
dev_warn(&pdev->dev, "ntuple filter loc = %d, could not be added\n",
- rx_desc->wb.qword0.hi_dword.fd_id);
+ pf->fd_inv);
/* Check if the programming error is for ATR.
* If so, auto disable ATR and set a state for