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netvsc: allow get/set of RSS indirection table

Browse Source 
Allow setting receive indirection table. Also uses the system standard
for initialization.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
stephen hemminger 2017-01-24 13:06:04 -08:00 committed by David S. Miller
parent 2b01888d1b
commit ff4a441990
3 changed files with 31 additions and 5 deletions
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1
drivers/net/hyperv/hyperv_net.h
View File

@ -170,6 +170,7 @@ struct rndis_device {
u8 hw_mac_adr[ETH_ALEN];
u8 rss_key[NETVSC_HASH_KEYLEN];
u16 ind_table[ITAB_NUM];
};

26
drivers/net/hyperv/netvsc_drv.c
View File

@ -1035,7 +1035,7 @@ static u32 netvsc_get_rxfh_key_size(struct net_device *dev)
static u32 netvsc_rss_indir_size(struct net_device *dev)
{
return 0;
return ITAB_NUM;
}
static int netvsc_get_rxfh(struct net_device *dev, u32 *indir, u8 *key,
@ -1044,10 +1044,16 @@ static int netvsc_get_rxfh(struct net_device *dev, u32 *indir, u8 *key,
struct net_device_context *ndc = netdev_priv(dev);
struct netvsc_device *ndev = ndc->nvdev;
struct rndis_device *rndis_dev = ndev->extension;
int i;
if (hfunc)
*hfunc = ETH_RSS_HASH_TOP; /* Toeplitz */
if (indir) {
for (i = 0; i < ITAB_NUM; i++)
indir[i] = rndis_dev->ind_table[i];
}
if (key)
memcpy(key, rndis_dev->rss_key, NETVSC_HASH_KEYLEN);
@ -1060,12 +1066,26 @@ static int netvsc_set_rxfh(struct net_device *dev, const u32 *indir,
struct net_device_context *ndc = netdev_priv(dev);
struct netvsc_device *ndev = ndc->nvdev;
struct rndis_device *rndis_dev = ndev->extension;
int i;
if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP)
return -EOPNOTSUPP;
if (!key || memcmp(key, rndis_dev->rss_key, NETVSC_HASH_KEYLEN) == 0)
return 0; /* no change */
if (indir) {
for (i = 0; i < ITAB_NUM; i++)
if (indir[i] >= dev->num_rx_queues)
return -EINVAL;
for (i = 0; i < ITAB_NUM; i++)
rndis_dev->ind_table[i] = indir[i];
}
if (!key) {
if (!indir)
return 0;
key = rndis_dev->rss_key;
}
return rndis_filter_set_rss_param(rndis_dev, key, ndev->num_chn);
}

9
drivers/net/hyperv/rndis_filter.c
View File

@ -780,7 +780,7 @@ int rndis_filter_set_rss_param(struct rndis_device *rdev,
/* Set indirection table entries */
itab = (u32 *)(rssp + 1);
for (i = 0; i < ITAB_NUM; i++)
itab[i] = i % num_queue;
itab[i] = rdev->ind_table[i];
/* Set hask key values */
keyp = (u8 *)((unsigned long)rssp + rssp->kashkey_offset);
@ -1035,7 +1035,6 @@ static void netvsc_sc_open(struct vmbus_channel *new_sc)
int rndis_filter_device_add(struct hv_device *dev,
void *additional_info)
{
int ret;
struct net_device *net = hv_get_drvdata(dev);
struct net_device_context *net_device_ctx = netdev_priv(net);
struct netvsc_device *net_device;
@ -1053,6 +1052,7 @@ int rndis_filter_device_add(struct hv_device *dev,
const struct cpumask *node_cpu_mask;
u32 num_possible_rss_qs;
unsigned long flags;
int i, ret;
rndis_device = get_rndis_device();
if (!rndis_device)
@ -1206,6 +1206,11 @@ int rndis_filter_device_add(struct hv_device *dev,
net_device->num_chn = min(num_possible_rss_qs, num_rss_qs);
num_rss_qs = net_device->num_chn - 1;
for (i = 0; i < ITAB_NUM; i++)
rndis_device->ind_table[i] = ethtool_rxfh_indir_default(i,
net_device->num_chn);
net_device->num_sc_offered = num_rss_qs;
if (net_device->num_chn == 1)