[dpdk-dev] [PATCH v3 13/20] 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>
Acked-by: Chen Jing D(Mark) <jing.d.chen at intel.com>
Acked-by: Helin Zhang <helin.zhang at intel.com>
---
 lib/librte_pmd_i40e/i40e_fdir.c | 43 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/lib/librte_pmd_i40e/i40e_fdir.c b/lib/librte_pmd_i40e/i40e_fdir.c
index d6c1793..973c8e0 100644
--- a/lib/librte_pmd_i40e/i40e_fdir.c
+++ b/lib/librte_pmd_i40e/i40e_fdir.c
@@ -92,6 +92,7 @@ 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);
 
@@ -867,6 +868,45 @@ i40e_fdir_filter_programming(struct i40e_pf *pf,
 }
 
 /*
+ * i40e_fdir_flush - clear all filters of Flow Director
+ * @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
@@ -925,6 +965,9 @@ 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_OP_FLUSH:
+		ret = i40e_fdir_flush(pf);
+		break;
 	case RTE_ETH_FILTER_OP_GET_INFO:
 		i40e_fdir_info_get(pf, (struct rte_eth_fdir_info *)arg);
 		break;
-- 
1.8.1.4