[dpdk-dev] [PATCH v5 4/5] i40e: add hardware initialization

[Helin Zhang <helin.zhang@intel.com>]

As global registers will be reset only after a whole chip reset,
those registers might not be in an initial state after each
launching a physical port. The hardware initialization is added to
put specific global registers into an initial state.

Signed-off-by: Helin Zhang <helin.zhang@intel.com>
---
 lib/librte_pmd_i40e/i40e_ethdev.c | 78 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)

diff --git a/lib/librte_pmd_i40e/i40e_ethdev.c b/lib/librte_pmd_i40e/i40e_ethdev.c
index 7531e3c..cedd09a 100644
--- a/lib/librte_pmd_i40e/i40e_ethdev.c
+++ b/lib/librte_pmd_i40e/i40e_ethdev.c
@@ -190,6 +190,7 @@ static int i40e_dev_filter_ctrl(struct rte_eth_dev *dev,
 				enum rte_filter_type filter_type,
 				enum rte_filter_op filter_op,
 				void *arg);
+static void i40e_hw_init(struct i40e_hw *hw);
 
 static struct rte_pci_id pci_id_i40e_map[] = {
 #define RTE_PCI_DEV_ID_DECL_I40E(vend, dev) {RTE_PCI_DEVICE(vend, dev)},
@@ -368,6 +369,9 @@ eth_i40e_dev_init(__rte_unused struct eth_driver *eth_drv,
 	/* Make sure all is clean before doing PF reset */
 	i40e_clear_hw(hw);
 
+	/* Initialize the hardware */
+	i40e_hw_init(hw);
+
 	/* Reset here to make sure all is clean for each PF */
 	ret = i40e_pf_reset(hw);
 	if (ret) {
@@ -4541,3 +4545,77 @@ i40e_dev_filter_ctrl(struct rte_eth_dev *dev,
 
 	return ret;
 }
+
+/* Initialization for hash function */
+static void
+i40e_hash_function_hw_init(struct i40e_hw *hw)
+{
+	uint32_t i;
+	const struct rte_eth_sym_hash_ena_info sym_hash_ena_info[] = {
+		{ETH_RSS_NONF_IPV4_UDP_SHIFT, 0},
+		{ETH_RSS_NONF_IPV4_TCP_SHIFT, 0},
+		{ETH_RSS_NONF_IPV4_SCTP_SHIFT, 0},
+		{ETH_RSS_NONF_IPV4_OTHER_SHIFT, 0},
+		{ETH_RSS_FRAG_IPV4_SHIFT, 0},
+		{ETH_RSS_NONF_IPV6_UDP_SHIFT, 0},
+		{ETH_RSS_NONF_IPV6_TCP_SHIFT, 0},
+		{ETH_RSS_NONF_IPV6_SCTP_SHIFT, 0},
+		{ETH_RSS_NONF_IPV6_OTHER_SHIFT, 0},
+		{ETH_RSS_FRAG_IPV6_SHIFT, 0},
+		{ETH_RSS_L2_PAYLOAD_SHIFT, 0},
+	};
+	const struct rte_eth_filter_swap_info swap_info[] = {
+		{ETH_RSS_NONF_IPV4_UDP_SHIFT,
+			0x1e, 0x36, 0x04, 0x3a, 0x3c, 0x02},
+		{ETH_RSS_NONF_IPV4_TCP_SHIFT,
+			0x1e, 0x36, 0x04, 0x3a, 0x3c, 0x02},
+		{ETH_RSS_NONF_IPV4_SCTP_SHIFT,
+			0x1e, 0x36, 0x04, 0x00, 0x00, 0x00},
+		{ETH_RSS_NONF_IPV4_OTHER_SHIFT,
+			0x1e, 0x36, 0x04, 0x00, 0x00, 0x00},
+		{ETH_RSS_FRAG_IPV4_SHIFT,
+			0x1e, 0x36, 0x04, 0x00, 0x00, 0x00},
+		{ETH_RSS_NONF_IPV6_UDP_SHIFT,
+			0x1a, 0x2a, 0x10, 0x3a, 0x3c, 0x02},
+		{ETH_RSS_NONF_IPV6_TCP_SHIFT,
+			0x1a, 0x2a, 0x10, 0x3a, 0x3c, 0x02},
+		{ETH_RSS_NONF_IPV6_SCTP_SHIFT,
+			0x1a, 0x2a, 0x10, 0x00, 0x00, 0x00},
+		{ETH_RSS_NONF_IPV6_OTHER_SHIFT,
+			0x1a, 0x2a, 0x10, 0x00, 0x00, 0x00},
+		{ETH_RSS_FRAG_IPV6_SHIFT,
+			0x1a, 0x2a, 0x10, 0x00, 0x00, 0x00},
+		{ETH_RSS_L2_PAYLOAD_SHIFT,
+			0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
+	};
+
+	/* Disable symmetric hash per PCTYPE */
+	for (i = 0; i < RTE_DIM(sym_hash_ena_info); i++)
+		i40e_set_symmetric_hash_enable_per_pctype(hw,
+					&sym_hash_ena_info[i]);
+
+	/* Disable symmetric hash per port */
+	i40e_set_symmetric_hash_enable_per_port(hw, 0);
+
+	/* Initialize filter swap */
+	for (i = 0; i < RTE_DIM(swap_info); i++)
+		i40e_set_filter_swap(hw, &swap_info[i]);
+
+	/* Set hash function to Toeplitz by default */
+	i40e_set_hash_function(hw, RTE_ETH_HASH_FUNCTION_TOEPLITZ);
+}
+
+/*
+ * As global registers wouldn't be reset unless a global hardware reset,
+ * hardware initialization is needed to put those registers into an
+ * expected initial state.
+ */
+static void
+i40e_hw_init(struct i40e_hw *hw)
+{
+	/* clear the PF Queue Filter control register */
+	I40E_WRITE_REG(hw, I40E_PFQF_CTL_0, 0);
+
+	/* Initialize hardware for hash function */
+	i40e_hash_function_hw_init(hw);
+}
-- 
1.8.1.4