i40e/i40evf: Update RSS configuration

This patch changes the RSS configuration to set table size
and write to hardware to confirm RSS table size being used.

Change-ID: I455a4c09c9dd479f5791ee1f09fdc83ff9908df5
Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e.h

@@ -350,6 +350,7 @@ struct i40e_pf {
 	u32 rx_hwtstamp_cleared;
 	bool ptp_tx;
 	bool ptp_rx;
+	u16 rss_table_size;
 };
 
 struct i40e_mac_filter {

drivers/net/ethernet/intel/i40e/i40e_common.c

@@ -1839,7 +1839,6 @@ static void i40e_parse_discover_capabilities(struct i40e_hw *hw, void *buff,
 	struct i40e_aqc_list_capabilities_element_resp *cap;
 	u32 number, logical_id, phys_id;
 	struct i40e_hw_capabilities *p;
-	u32 reg_val;
 	u32 i = 0;
 	u16 id;
 
@@ -1910,11 +1909,7 @@ static void i40e_parse_discover_capabilities(struct i40e_hw *hw, void *buff,
 			break;
 		case I40E_DEV_FUNC_CAP_RSS:
 			p->rss = true;
-			reg_val = rd32(hw, I40E_PFQF_CTL_0);
-			if (reg_val & I40E_PFQF_CTL_0_HASHLUTSIZE_MASK)
 			p->rss_table_size = number;
-			else
-				p->rss_table_size = 128;
 			p->rss_table_entry_width = logical_id;
 			break;
 		case I40E_DEV_FUNC_CAP_RX_QUEUES:

drivers/net/ethernet/intel/i40e/i40e_main.c

@@ -6599,6 +6599,7 @@ static int i40e_config_rss(struct i40e_pf *pf)
 	u32 lut = 0;
 	int i, j;
 	u64 hena;
+	u32 reg_val;
 
 	/* Fill out hash function seed */
 	for (i = 0; i <= I40E_PFQF_HKEY_MAX_INDEX; i++)
@@ -6611,8 +6612,19 @@ static int i40e_config_rss(struct i40e_pf *pf)
 	wr32(hw, I40E_PFQF_HENA(0), (u32)hena);
 	wr32(hw, I40E_PFQF_HENA(1), (u32)(hena >> 32));
 
+	/* Check capability and Set table size and register per hw expectation*/
+	reg_val = rd32(hw, I40E_PFQF_CTL_0);
+	if (hw->func_caps.rss_table_size == 512) {
+		reg_val |= I40E_PFQF_CTL_0_HASHLUTSIZE_512;
+		pf->rss_table_size = 512;
+	} else {
+		pf->rss_table_size = 128;
+		reg_val &= ~I40E_PFQF_CTL_0_HASHLUTSIZE_512;
+	}
+	wr32(hw, I40E_PFQF_CTL_0, reg_val);
+
 	/* Populate the LUT with max no. of queues in round robin fashion */
-	for (i = 0, j = 0; i < pf->hw.func_caps.rss_table_size; i++, j++) {
+	for (i = 0, j = 0; i < pf->rss_table_size; i++, j++) {
 
 		/* The assumption is that lan qp count will be the highest
 		 * qp count for any PF VSI that needs RSS.

drivers/net/ethernet/intel/i40e/i40e_type.h

@@ -1165,4 +1165,7 @@ enum i40e_reset_type {
 	I40E_RESET_GLOBR	= 2,
 	I40E_RESET_EMPR		= 3,
 };
+
+/* RSS Hash Table Size */
+#define I40E_PFQF_CTL_0_HASHLUTSIZE_512	0x00010000
 #endif /* _I40E_TYPE_H_ */

drivers/net/ethernet/intel/i40evf/i40e_type.h

@@ -1165,4 +1165,7 @@ enum i40e_reset_type {
 	I40E_RESET_GLOBR	= 2,
 	I40E_RESET_EMPR		= 3,
 };
+
+/* RSS Hash Table Size */
+#define I40E_PFQF_CTL_0_HASHLUTSIZE_512	0x00010000
 #endif /* _I40E_TYPE_H_ */