[dpdk-dev] [PATCH v5 14/21] i40e: implement operation to flush flow director table

[Jingjing Wu]

Implement operation to flush flow director table

Signed-off-by: Jingjing Wu <jingjing.wu at intel.com>
---
 lib/librte_pmd_i40e/i40e_fdir.c | 47 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

diff --git a/lib/librte_pmd_i40e/i40e_fdir.c b/lib/librte_pmd_i40e/i40e_fdir.c
index 85df220..f59eb24 100644
--- a/lib/librte_pmd_i40e/i40e_fdir.c
+++ b/lib/librte_pmd_i40e/i40e_fdir.c
@@ -73,6 +73,10 @@
 #define I40E_FDIR_WAIT_COUNT       10
 #define I40E_FDIR_WAIT_INTERVAL_US 1000

+/* Wait count and interval for fdir filter flush */
+#define I40E_FDIR_FLUSH_RETRY       50
+#define I40E_FDIR_FLUSH_INTERVAL_MS 5
+
 #define I40E_COUNTER_PF           2
 /* Statistic counter index for one pf */
 #define I40E_COUNTER_INDEX_FDIR(pf_id)   (0 + (pf_id) * I40E_COUNTER_PF)
@@ -89,6 +93,7 @@ static int i40e_fdir_filter_programming(struct i40e_pf *pf,
                        enum i40e_filter_pctype pctype,
                        struct rte_eth_fdir_filter *filter,
                        bool add);
+static int i40e_fdir_flush(struct i40e_pf *pf);
 static void i40e_fdir_info_get(struct i40e_pf *pf,
                           struct rte_eth_fdir_info *fdir);

@@ -876,6 +881,45 @@ i40e_fdir_filter_programming(struct i40e_pf *pf,
 }

 /*
+ * i40e_fdir_flush - clear all filters of Flow Director table
+ * @pf: board private structure
+ */
+static int
+i40e_fdir_flush(struct i40e_pf *pf)
+{
+       struct i40e_hw *hw = I40E_PF_TO_HW(pf);
+       uint32_t reg;
+       uint16_t guarant_cnt, best_cnt;
+       int i;
+
+       I40E_WRITE_REG(hw, I40E_PFQF_CTL_1, I40E_PFQF_CTL_1_CLEARFDTABLE_MASK);
+       I40E_WRITE_FLUSH(hw);
+
+       for (i = 0; i < I40E_FDIR_FLUSH_RETRY; i++) {
+               rte_delay_ms(I40E_FDIR_FLUSH_INTERVAL_MS);
+               reg = I40E_READ_REG(hw, I40E_PFQF_CTL_1);
+               if (!(reg & I40E_PFQF_CTL_1_CLEARFDTABLE_MASK))
+                       break;
+       }
+       if (i >= I40E_FDIR_FLUSH_RETRY) {
+               PMD_DRV_LOG(ERR, "FD table did not flush, may need more time.");
+               return -ETIMEDOUT;
+       }
+       guarant_cnt = (uint16_t)((I40E_READ_REG(hw, I40E_PFQF_FDSTAT) &
+                               I40E_PFQF_FDSTAT_GUARANT_CNT_MASK) >>
+                               I40E_PFQF_FDSTAT_GUARANT_CNT_SHIFT);
+       best_cnt = (uint16_t)((I40E_READ_REG(hw, I40E_PFQF_FDSTAT) &
+                               I40E_PFQF_FDSTAT_BEST_CNT_MASK) >>
+                               I40E_PFQF_FDSTAT_BEST_CNT_SHIFT);
+       if (guarant_cnt != 0 || best_cnt != 0) {
+               PMD_DRV_LOG(ERR, "Failed to flush FD table.");
+               return -ENOSYS;
+       } else
+               PMD_DRV_LOG(INFO, "FD table Flush success.");
+       return 0;
+}
+
+/*
  * i40e_fdir_info_get - get information of Flow Director
  * @pf: ethernet device to get info from
  * @fdir: a pointer to a structure of type *rte_eth_fdir_info* to be filled 
with
@@ -934,6 +978,9 @@ i40e_fdir_ctrl_func(struct i40e_pf *pf, enum rte_filter_op 
filter_op, void *arg)
                        (struct rte_eth_fdir_filter *)arg,
                        FALSE);
                break;
+       case RTE_ETH_FILTER_FLUSH:
+               ret = i40e_fdir_flush(pf);
+               break;
        case RTE_ETH_FILTER_INFO:
                i40e_fdir_info_get(pf, (struct rte_eth_fdir_info *)arg);
                break;
-- 
1.8.1.4