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i40e: add ethtool RSS support 

Add support for setting the RSS hash table and hash key through ethtool.
This patch incorporates suggestions from Ben Hutchings
<ben.hutchings@codethink.co.uk>.

Reported-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
hifive-unleashed-5.1
Mitch A Williams 2015-03-05 04:14:40 +00:00 committed by Jeff Kirsher
parent ec7a06fd6d
commit b29e13bb91
2 changed files with 110 additions and 0 deletions
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2
drivers/net/ethernet/intel/i40e/i40e.h
View File

@ -177,6 +177,8 @@ struct i40e_lump_tracking {
#define I40E_FDIR_BUFFER_HEAD_ROOM 32
#define I40E_FDIR_BUFFER_HEAD_ROOM_FOR_ATR (I40E_FDIR_BUFFER_HEAD_ROOM * 4)
#define I40E_HKEY_ARRAY_SIZE ((I40E_PFQF_HKEY_MAX_INDEX + 1) * 4)
enum i40e_fd_stat_idx {
I40E_FD_STAT_ATR,
I40E_FD_STAT_SB,

108
drivers/net/ethernet/intel/i40e/i40e_ethtool.c
View File

@ -2375,6 +2375,110 @@ static int i40e_set_channels(struct net_device *dev,
return -EINVAL;
}
#define I40E_HLUT_ARRAY_SIZE ((I40E_PFQF_HLUT_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;
}
static int i40e_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
u8 *hfunc)
{
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 (hfunc)
*hfunc = ETH_RSS_HASH_TOP;
if (!indir)
return 0;
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, const u8 hfunc)
{
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 (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP)
return -EOPNOTSUPP;
if (!indir)
return 0;
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;
}
/**
* i40e_get_priv_flags - report device private flags
* @dev: network interface device structure
@ -2426,6 +2530,10 @@ 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,