+++ /dev/null
-From: Gregory CLEMENT <gregory.clement@free-electrons.com>
-Date: Wed, 9 Dec 2015 18:23:50 +0100
-Subject: [PATCH] net: mvneta: Add naive RSS support
-
-This patch adds the support for the RSS related ethtool
-function. Currently it only uses one entry in the indirection table which
-allows associating an mvneta interface to a given CPU.
-
-Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
-Tested-by: Marcin Wojtas <mw@semihalf.com>
-Signed-off-by: David S. Miller <davem@davemloft.net>
----
-
---- a/drivers/net/ethernet/marvell/mvneta.c
-+++ b/drivers/net/ethernet/marvell/mvneta.c
-@@ -261,6 +261,11 @@
-
- #define MVNETA_TX_MTU_MAX 0x3ffff
-
-+/* The RSS lookup table actually has 256 entries but we do not use
-+ * them yet
-+ */
-+#define MVNETA_RSS_LU_TABLE_SIZE 1
-+
- /* TSO header size */
- #define TSO_HEADER_SIZE 128
-
-@@ -382,6 +387,8 @@ struct mvneta_port {
- unsigned int use_inband_status:1;
-
- u64 ethtool_stats[ARRAY_SIZE(mvneta_statistics)];
-+
-+ u32 indir[MVNETA_RSS_LU_TABLE_SIZE];
- };
-
- /* The mvneta_tx_desc and mvneta_rx_desc structures describe the
-@@ -1067,7 +1074,7 @@ static void mvneta_defaults_set(struct m
- if ((rxq % max_cpu) == cpu)
- rxq_map |= MVNETA_CPU_RXQ_ACCESS(rxq);
-
-- if (cpu == rxq_def)
-+ if (cpu == pp->rxq_def)
- txq_map = MVNETA_CPU_TXQ_ACCESS_ALL_MASK;
-
- mvreg_write(pp, MVNETA_CPU_MAP(cpu), rxq_map | txq_map);
-@@ -2508,6 +2515,18 @@ static void mvneta_percpu_unmask_interru
- MVNETA_MISCINTR_INTR_MASK);
- }
-
-+static void mvneta_percpu_mask_interrupt(void *arg)
-+{
-+ struct mvneta_port *pp = arg;
-+
-+ /* All the queue are masked, but actually only the ones
-+ * maped to this CPU will be masked
-+ */
-+ mvreg_write(pp, MVNETA_INTR_NEW_MASK, 0);
-+ mvreg_write(pp, MVNETA_INTR_OLD_MASK, 0);
-+ mvreg_write(pp, MVNETA_INTR_MISC_MASK, 0);
-+}
-+
- static void mvneta_start_dev(struct mvneta_port *pp)
- {
- unsigned int cpu;
-@@ -3231,6 +3250,106 @@ static int mvneta_ethtool_get_sset_count
- return -EOPNOTSUPP;
- }
-
-+static u32 mvneta_ethtool_get_rxfh_indir_size(struct net_device *dev)
-+{
-+ return MVNETA_RSS_LU_TABLE_SIZE;
-+}
-+
-+static int mvneta_ethtool_get_rxnfc(struct net_device *dev,
-+ struct ethtool_rxnfc *info,
-+ u32 *rules __always_unused)
-+{
-+ switch (info->cmd) {
-+ case ETHTOOL_GRXRINGS:
-+ info->data = rxq_number;
-+ return 0;
-+ case ETHTOOL_GRXFH:
-+ return -EOPNOTSUPP;
-+ default:
-+ return -EOPNOTSUPP;
-+ }
-+}
-+
-+static int mvneta_config_rss(struct mvneta_port *pp)
-+{
-+ int cpu;
-+ u32 val;
-+
-+ netif_tx_stop_all_queues(pp->dev);
-+
-+ for_each_online_cpu(cpu)
-+ smp_call_function_single(cpu, mvneta_percpu_mask_interrupt,
-+ pp, true);
-+
-+ /* We have to synchronise on the napi of each CPU */
-+ for_each_online_cpu(cpu) {
-+ struct mvneta_pcpu_port *pcpu_port =
-+ per_cpu_ptr(pp->ports, cpu);
-+
-+ napi_synchronize(&pcpu_port->napi);
-+ napi_disable(&pcpu_port->napi);
-+ }
-+
-+ pp->rxq_def = pp->indir[0];
-+
-+ /* Update unicast mapping */
-+ mvneta_set_rx_mode(pp->dev);
-+
-+ /* Update val of portCfg register accordingly with all RxQueue types */
-+ val = MVNETA_PORT_CONFIG_DEFL_VALUE(pp->rxq_def);
-+ mvreg_write(pp, MVNETA_PORT_CONFIG, val);
-+
-+ /* Update the elected CPU matching the new rxq_def */
-+ mvneta_percpu_elect(pp);
-+
-+ /* We have to synchronise on the napi of each CPU */
-+ for_each_online_cpu(cpu) {
-+ struct mvneta_pcpu_port *pcpu_port =
-+ per_cpu_ptr(pp->ports, cpu);
-+
-+ napi_enable(&pcpu_port->napi);
-+ }
-+
-+ netif_tx_start_all_queues(pp->dev);
-+
-+ return 0;
-+}
-+
-+static int mvneta_ethtool_set_rxfh(struct net_device *dev, const u32 *indir,
-+ const u8 *key, const u8 hfunc)
-+{
-+ struct mvneta_port *pp = netdev_priv(dev);
-+ /* We require at least one supported parameter to be changed
-+ * and no change in any of the unsupported parameters
-+ */
-+ if (key ||
-+ (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP))
-+ return -EOPNOTSUPP;
-+
-+ if (!indir)
-+ return 0;
-+
-+ memcpy(pp->indir, indir, MVNETA_RSS_LU_TABLE_SIZE);
-+
-+ return mvneta_config_rss(pp);
-+}
-+
-+static int mvneta_ethtool_get_rxfh(struct net_device *dev, u32 *indir, u8 *key,
-+ u8 *hfunc)
-+{
-+ struct mvneta_port *pp = netdev_priv(dev);
-+
-+ if (hfunc)
-+ *hfunc = ETH_RSS_HASH_TOP;
-+
-+ if (!indir)
-+ return 0;
-+
-+ memcpy(indir, pp->indir, MVNETA_RSS_LU_TABLE_SIZE);
-+
-+ return 0;
-+}
-+
- static const struct net_device_ops mvneta_netdev_ops = {
- .ndo_open = mvneta_open,
- .ndo_stop = mvneta_stop,
-@@ -3255,6 +3374,10 @@ const struct ethtool_ops mvneta_eth_tool
- .get_strings = mvneta_ethtool_get_strings,
- .get_ethtool_stats = mvneta_ethtool_get_stats,
- .get_sset_count = mvneta_ethtool_get_sset_count,
-+ .get_rxfh_indir_size = mvneta_ethtool_get_rxfh_indir_size,
-+ .get_rxnfc = mvneta_ethtool_get_rxnfc,
-+ .get_rxfh = mvneta_ethtool_get_rxfh,
-+ .set_rxfh = mvneta_ethtool_set_rxfh,
- };
-
- /* Initialize hw */
-@@ -3446,6 +3569,8 @@ static int mvneta_probe(struct platform_
-
- pp->rxq_def = rxq_def;
-
-+ pp->indir[0] = rxq_def;
-+
- pp->clk = devm_clk_get(&pdev->dev, NULL);
- if (IS_ERR(pp->clk)) {
- err = PTR_ERR(pp->clk);
projects / openwrt / staging / lynxis / omap.git / blobdiff