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Date: Fri, 21 Nov 2014 21:55:05 -0800
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net
Cc: Mitch Williams <mitch.a.williams@...el.com>,
netdev@...r.kernel.org, nhorman@...hat.com, sassmann@...hat.com,
jogreene@...hat.com, Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 14/17] i40e: implement ethtool RSS config
From: Mitch Williams <mitch.a.williams@...el.com>
Support ethtool methods for getting and setting the RSS look-up table.
Change-ID: I52707fb371fc11fe9fd4c287e08542cde38f79d4
Signed-off-by: Mitch Williams <mitch.a.williams@...el.com>
Tested-by: Jim Young <jamesx.m.young@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
drivers/net/ethernet/intel/i40e/i40e_ethtool.c | 104 +++++++++++++++++++++++++
1 file changed, 104 insertions(+)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
index fcd815d..f9f68ea 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
@@ -2237,6 +2237,106 @@ static int i40e_set_channels(struct net_device *dev,
return -EINVAL;
}
+#define I40E_HLUT_ARRAY_SIZE ((I40E_PFQF_HLUT_MAX_INDEX + 1) * 4)
+#define I40E_HKEY_ARRAY_SIZE ((I40E_PFQF_HKEY_MAX_INDEX * 1) * 4)
+/**
+ * i40e_get_rxfh_key_size - get the RSS hash key size
+ * @netdev: network interface device structure
+ *
+ * Returns the table size.
+ **/
+static u32 i40e_get_rxfh_key_size(struct net_device *netdev)
+{
+ return I40E_HKEY_ARRAY_SIZE;
+}
+
+/**
+ * i40e_get_rxfh_indir_size - get the rx flow hash indirection table size
+ * @netdev: network interface device structure
+ *
+ * Returns the table size.
+ **/
+static u32 i40e_get_rxfh_indir_size(struct net_device *netdev)
+{
+ return I40E_HLUT_ARRAY_SIZE;
+}
+
+/**
+ * i40e_get_rxfh - get the rx flow hash indirection table
+ * @netdev: network interface device structure
+ * @indir: indirection table
+ * @key: hash key
+ *
+ * Reads the indirection table directly from the hardware. Always returns 0.
+ **/
+static int i40e_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key)
+{
+ struct i40e_netdev_priv *np = netdev_priv(netdev);
+ struct i40e_vsi *vsi = np->vsi;
+ struct i40e_pf *pf = vsi->back;
+ struct i40e_hw *hw = &pf->hw;
+ u32 reg_val;
+ int i, j;
+
+ for (i = 0, j = 0; i <= I40E_PFQF_HLUT_MAX_INDEX; i++) {
+ reg_val = rd32(hw, I40E_PFQF_HLUT(i));
+ indir[j++] = reg_val & 0xff;
+ indir[j++] = (reg_val >> 8) & 0xff;
+ indir[j++] = (reg_val >> 16) & 0xff;
+ indir[j++] = (reg_val >> 24) & 0xff;
+ }
+ if (key) {
+ for (i = 0, j = 0; i <= I40E_PFQF_HKEY_MAX_INDEX; i++) {
+ reg_val = rd32(hw, I40E_PFQF_HKEY(i));
+ key[j++] = (u8)(reg_val & 0xff);
+ key[j++] = (u8)((reg_val >> 8) & 0xff);
+ key[j++] = (u8)((reg_val >> 16) & 0xff);
+ key[j++] = (u8)((reg_val >> 24) & 0xff);
+ }
+ }
+ return 0;
+}
+
+/**
+ * i40e_set_rxfh - set the rx flow hash indirection table
+ * @netdev: network interface device structure
+ * @indir: indirection table
+ * @key: hash key
+ *
+ * Returns -EINVAL if the table specifies an inavlid queue id, otherwise
+ * returns 0 after programming the table.
+ **/
+static int i40e_set_rxfh(struct net_device *netdev, const u32 *indir,
+ const u8 *key)
+{
+ struct i40e_netdev_priv *np = netdev_priv(netdev);
+ struct i40e_vsi *vsi = np->vsi;
+ struct i40e_pf *pf = vsi->back;
+ struct i40e_hw *hw = &pf->hw;
+ u32 reg_val;
+ int i, j;
+
+ if (indir) {
+ for (i = 0, j = 0; i <= I40E_PFQF_HLUT_MAX_INDEX; i++) {
+ reg_val = indir[j++];
+ reg_val |= indir[j++] << 8;
+ reg_val |= indir[j++] << 16;
+ reg_val |= indir[j++] << 24;
+ wr32(hw, I40E_PFQF_HLUT(i), reg_val);
+ }
+ }
+ if (key) {
+ for (i = 0, j = 0; i <= I40E_PFQF_HKEY_MAX_INDEX; i++) {
+ reg_val = key[j++];
+ reg_val |= key[j++] << 8;
+ reg_val |= key[j++] << 16;
+ reg_val |= key[j++] << 24;
+ wr32(hw, I40E_PFQF_HKEY(i), reg_val);
+ }
+ }
+ return 0;
+}
+
static const struct ethtool_ops i40e_ethtool_ops = {
.get_settings = i40e_get_settings,
.set_settings = i40e_set_settings,
@@ -2265,6 +2365,10 @@ static const struct ethtool_ops i40e_ethtool_ops = {
.get_ethtool_stats = i40e_get_ethtool_stats,
.get_coalesce = i40e_get_coalesce,
.set_coalesce = i40e_set_coalesce,
+ .get_rxfh_key_size = i40e_get_rxfh_key_size,
+ .get_rxfh_indir_size = i40e_get_rxfh_indir_size,
+ .get_rxfh = i40e_get_rxfh,
+ .set_rxfh = i40e_set_rxfh,
.get_channels = i40e_get_channels,
.set_channels = i40e_set_channels,
.get_ts_info = i40e_get_ts_info,
--
1.9.3
--
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