diff options
| author |   Lendacky, Thomas <Thomas.Lendacky@amd.com> | 2014-11-04 16:07:02 -0600 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-11-05 21:50:12 -0500 |
| commit | 5b9dfe299e55604af47cdca9d03d2e9d4fe2ad53 (patch) | |
| tree | c011bc202e146d22f51b526c39344bf3887e7a53 /drivers/net/ethernet/amd/xgbe/xgbe-main.c | |
| parent | amd-xgbe: Add support for per DMA channel interrupts (diff) | |
| download | linux-dev-5b9dfe299e55604af47cdca9d03d2e9d4fe2ad53.tar.xz linux-dev-5b9dfe299e55604af47cdca9d03d2e9d4fe2ad53.zip | |
amd-xgbe: Provide support for receive side scaling
This patch provides support for receive side scaling (RSS). RSS allows
for spreading incoming network packets across the Rx queues. When used
in conjunction with the per DMA channel interrupt support, this allows
the receive processing to be spread across multiple processors.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/amd/xgbe/xgbe-main.c')
| -rw-r--r-- | drivers/net/ethernet/amd/xgbe/xgbe-main.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-main.c b/drivers/net/ethernet/amd/xgbe/xgbe-main.c index cff9902d1456..05fbdf96e77e 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-main.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-main.c @@ -170,6 +170,7 @@ static int xgbe_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct resource *res; const u8 *mac_addr; + unsigned int i; int ret; DBGPR("--> xgbe_probe\n"); @@ -190,6 +191,7 @@ static int xgbe_probe(struct platform_device *pdev) spin_lock_init(&pdata->lock); mutex_init(&pdata->xpcs_mutex); + mutex_init(&pdata->rss_mutex); spin_lock_init(&pdata->tstamp_lock); /* Set and validate the number of descriptors for a ring */ @@ -335,6 +337,17 @@ static int xgbe_probe(struct platform_device *pdev) goto err_io; } + /* Initialize RSS hash key and lookup table */ + get_random_bytes(pdata->rss_key, sizeof(pdata->rss_key)); + + for (i = 0; i < XGBE_RSS_MAX_TABLE_SIZE; i++) + XGMAC_SET_BITS(pdata->rss_table[i], MAC_RSSDR, DMCH, + i % pdata->rx_ring_count); + + XGMAC_SET_BITS(pdata->rss_options, MAC_RSSCR, IP2TE, 1); + XGMAC_SET_BITS(pdata->rss_options, MAC_RSSCR, TCP4TE, 1); + XGMAC_SET_BITS(pdata->rss_options, MAC_RSSCR, UDP4TE, 1); + /* Prepare to regsiter with MDIO */ pdata->mii_bus_id = kasprintf(GFP_KERNEL, "%s", pdev->name); if (!pdata->mii_bus_id) { @@ -365,6 +378,9 @@ static int xgbe_probe(struct platform_device *pdev) NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_FILTER; + if (pdata->hw_feat.rss) + netdev->hw_features |= NETIF_F_RXHASH; + netdev->vlan_features |= NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | |