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enic: add support for set/get rss hash key 

This patch adds support for setting/getting rss hash key using ethtool.

v2:
respin patch to support RSS hash function changes.

Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Govindarajulu Varadarajan 2014-12-10 13:40:23 +05:30 committed by David S. Miller
parent 7dbea3e866
commit 4f675eb2a7
3 changed files with 49 additions and 4 deletions
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2
drivers/net/ethernet/cisco/enic/enic.h
View File

@ -187,6 +187,7 @@ struct enic {
unsigned int cq_count;
struct enic_rfs_flw_tbl rfs_h;
u32 rx_copybreak;
u8 rss_key[ENIC_RSS_LEN];
};
static inline struct device *enic_get_dev(struct enic *enic)
@ -246,5 +247,6 @@ int enic_sriov_enabled(struct enic *enic);
int enic_is_valid_vf(struct enic *enic, int vf);
int enic_is_dynamic(struct enic *enic);
void enic_set_ethtool_ops(struct net_device *netdev);
int __enic_set_rsskey(struct enic *enic);
#endif /* _ENIC_H_ */

38
drivers/net/ethernet/cisco/enic/enic_ethtool.c
View File

@ -23,6 +23,7 @@
#include "enic.h"
#include "enic_dev.h"
#include "enic_clsf.h"
#include "vnic_rss.h"
struct enic_stat {
char name[ETH_GSTRING_LEN];
@ -416,6 +417,40 @@ static int enic_set_tunable(struct net_device *dev,
return ret;
}
static u32 enic_get_rxfh_key_size(struct net_device *netdev)
{
return ENIC_RSS_LEN;
}
static int enic_get_rxfh(struct net_device *netdev, u32 *indir, u8 *hkey,
u8 *hfunc)
{
struct enic *enic = netdev_priv(netdev);
if (hkey)
memcpy(hkey, enic->rss_key, ENIC_RSS_LEN);
if (hfunc)
*hfunc = ETH_RSS_HASH_TOP;
return 0;
}
static int enic_set_rxfh(struct net_device *netdev, const u32 *indir,
const u8 *hkey, const u8 hfunc)
{
struct enic *enic = netdev_priv(netdev);
if ((hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP) ||
indir)
return -EINVAL;
if (hkey)
memcpy(enic->rss_key, hkey, ENIC_RSS_LEN);
return __enic_set_rsskey(enic);
}
static const struct ethtool_ops enic_ethtool_ops = {
.get_settings = enic_get_settings,
.get_drvinfo = enic_get_drvinfo,
@ -430,6 +465,9 @@ static const struct ethtool_ops enic_ethtool_ops = {
.get_rxnfc = enic_get_rxnfc,
.get_tunable = enic_get_tunable,
.set_tunable = enic_set_tunable,
.get_rxfh_key_size = enic_get_rxfh_key_size,
.get_rxfh = enic_get_rxfh,
.set_rxfh = enic_set_rxfh,
};
void enic_set_ethtool_ops(struct net_device *netdev)

13
drivers/net/ethernet/cisco/enic/enic_main.c
View File

@ -1888,11 +1888,10 @@ static int enic_dev_hang_reset(struct enic *enic)
return err;
}
static int enic_set_rsskey(struct enic *enic)
int __enic_set_rsskey(struct enic *enic)
{
union vnic_rss_key *rss_key_buf_va;
dma_addr_t rss_key_buf_pa;
u8 rss_key[ENIC_RSS_LEN];
int i, kidx, bidx, err;
rss_key_buf_va = pci_zalloc_consistent(enic->pdev,
@ -1901,11 +1900,10 @@ static int enic_set_rsskey(struct enic *enic)
if (!rss_key_buf_va)
return -ENOMEM;
netdev_rss_key_fill(rss_key, ENIC_RSS_LEN);
for (i = 0; i < ENIC_RSS_LEN; i++) {
kidx = i / ENIC_RSS_BYTES_PER_KEY;
bidx = i % ENIC_RSS_BYTES_PER_KEY;
rss_key_buf_va->key[kidx].b[bidx] = rss_key[i];
rss_key_buf_va->key[kidx].b[bidx] = enic->rss_key[i];
}
spin_lock_bh(&enic->devcmd_lock);
err = enic_set_rss_key(enic,
@ -1919,6 +1917,13 @@ static int enic_set_rsskey(struct enic *enic)
return err;
}
static int enic_set_rsskey(struct enic *enic)
{
netdev_rss_key_fill(enic->rss_key, ENIC_RSS_LEN);
return __enic_set_rsskey(enic);
}
static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
{
dma_addr_t rss_cpu_buf_pa;