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sfc: Add use of shared RSS contexts.

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Allow PFs to allocate shared RSS contexts if we exhaust our
exclusive RSS contexts. Make VFs use shared RSS contexts in
all cases.
Spruce up error handling so that the shadow copy of the RSS
table is updated after successful update, rather than in all
cases, so that we report the actual contents of the RSS table
after a failure to set it, rather than what we'd like it to be.

Populate context_size parameter when vacuously allocating RSS
context of size 1.

Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jon Cooper
2015-05-06 00:59:38 +01:00
committed by David S. Miller
parent 267d9d7387
commit 267c01571b
8 changed files with 177 additions and 36 deletions
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17
drivers/net/ethernet/sfc/efx.c
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@@ -1290,6 +1290,15 @@ static void efx_fini_io(struct efx_nic *efx)
pci_disable_device(efx->pci_dev);
}
void efx_set_default_rx_indir_table(struct efx_nic *efx)
{
size_t i;
for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++)
efx->rx_indir_table[i] =
ethtool_rxfh_indir_default(i, efx->rss_spread);
}
static unsigned int efx_wanted_parallelism(struct efx_nic *efx)
{
cpumask_var_t thread_mask;
@@ -1607,7 +1616,6 @@ static void efx_set_channels(struct efx_nic *efx)
static int efx_probe_nic(struct efx_nic *efx)
{
size_t i;
int rc;
netif_dbg(efx, probe, efx->net_dev, "creating NIC\n");
@@ -1630,10 +1638,9 @@ static int efx_probe_nic(struct efx_nic *efx)
goto fail2;
if (efx->n_channels > 1)
netdev_rss_key_fill(&efx->rx_hash_key, sizeof(efx->rx_hash_key));
for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++)
efx->rx_indir_table[i] =
ethtool_rxfh_indir_default(i, efx->rss_spread);
netdev_rss_key_fill(&efx->rx_hash_key,
sizeof(efx->rx_hash_key));
efx_set_default_rx_indir_table(efx);
netif_set_real_num_tx_queues(efx->net_dev, efx->n_tx_channels);
netif_set_real_num_rx_queues(efx->net_dev, efx->n_rx_channels);