* [PATCH net-next v3 1/4] net: mvneta: Make the default queue related for each port
2015-12-09 17:23 [PATCH net-next v3 0/4] mvneta: Introduce RSS support and XPS configuration Gregory CLEMENT
@ 2015-12-09 17:23 ` Gregory CLEMENT
2015-12-09 17:23 ` [PATCH net-next v3 2/4] net: mvneta: Associate RX queues with each CPU Gregory CLEMENT
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: Gregory CLEMENT @ 2015-12-09 17:23 UTC (permalink / raw)
To: linux-arm-kernel
Instead of using the same default queue for all the port. Move it in the
port struct. It will allow have a different default queue for each port.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
---
drivers/net/ethernet/marvell/mvneta.c | 33 ++++++++++++++++++---------------
1 file changed, 18 insertions(+), 15 deletions(-)
diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index e84c7f2634d3..1c7751917d58 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -354,6 +354,7 @@ struct mvneta_port {
struct mvneta_tx_queue *txqs;
struct net_device *dev;
struct notifier_block cpu_notifier;
+ int rxq_def;
/* Core clock */
struct clk *clk;
@@ -817,7 +818,7 @@ static void mvneta_port_up(struct mvneta_port *pp)
mvreg_write(pp, MVNETA_TXQ_CMD, q_map);
/* Enable all initialized RXQs. */
- mvreg_write(pp, MVNETA_RXQ_CMD, BIT(rxq_def));
+ mvreg_write(pp, MVNETA_RXQ_CMD, BIT(pp->rxq_def));
}
/* Stop the Ethernet port activity */
@@ -1027,7 +1028,7 @@ static void mvneta_defaults_set(struct mvneta_port *pp)
mvreg_write(pp, MVNETA_ACC_MODE, val);
/* Update val of portCfg register accordingly with all RxQueue types */
- val = MVNETA_PORT_CONFIG_DEFL_VALUE(rxq_def);
+ val = MVNETA_PORT_CONFIG_DEFL_VALUE(pp->rxq_def);
mvreg_write(pp, MVNETA_PORT_CONFIG, val);
val = 0;
@@ -2076,19 +2077,19 @@ static void mvneta_set_rx_mode(struct net_device *dev)
if (dev->flags & IFF_PROMISC) {
/* Accept all: Multicast + Unicast */
mvneta_rx_unicast_promisc_set(pp, 1);
- mvneta_set_ucast_table(pp, rxq_def);
- mvneta_set_special_mcast_table(pp, rxq_def);
- mvneta_set_other_mcast_table(pp, rxq_def);
+ mvneta_set_ucast_table(pp, pp->rxq_def);
+ mvneta_set_special_mcast_table(pp, pp->rxq_def);
+ mvneta_set_other_mcast_table(pp, pp->rxq_def);
} else {
/* Accept single Unicast */
mvneta_rx_unicast_promisc_set(pp, 0);
mvneta_set_ucast_table(pp, -1);
- mvneta_mac_addr_set(pp, dev->dev_addr, rxq_def);
+ mvneta_mac_addr_set(pp, dev->dev_addr, pp->rxq_def);
if (dev->flags & IFF_ALLMULTI) {
/* Accept all multicast */
- mvneta_set_special_mcast_table(pp, rxq_def);
- mvneta_set_other_mcast_table(pp, rxq_def);
+ mvneta_set_special_mcast_table(pp, pp->rxq_def);
+ mvneta_set_other_mcast_table(pp, pp->rxq_def);
} else {
/* Accept only initialized multicast */
mvneta_set_special_mcast_table(pp, -1);
@@ -2097,7 +2098,7 @@ static void mvneta_set_rx_mode(struct net_device *dev)
if (!netdev_mc_empty(dev)) {
netdev_for_each_mc_addr(ha, dev) {
mvneta_mcast_addr_set(pp, ha->addr,
- rxq_def);
+ pp->rxq_def);
}
}
}
@@ -2180,7 +2181,7 @@ static int mvneta_poll(struct napi_struct *napi, int budget)
* RX packets
*/
cause_rx_tx |= port->cause_rx_tx;
- rx_done = mvneta_rx(pp, budget, &pp->rxqs[rxq_def]);
+ rx_done = mvneta_rx(pp, budget, &pp->rxqs[pp->rxq_def]);
budget -= rx_done;
if (budget > 0) {
@@ -2393,17 +2394,17 @@ static void mvneta_cleanup_txqs(struct mvneta_port *pp)
/* Cleanup all Rx queues */
static void mvneta_cleanup_rxqs(struct mvneta_port *pp)
{
- mvneta_rxq_deinit(pp, &pp->rxqs[rxq_def]);
+ mvneta_rxq_deinit(pp, &pp->rxqs[pp->rxq_def]);
}
/* Init all Rx queues */
static int mvneta_setup_rxqs(struct mvneta_port *pp)
{
- int err = mvneta_rxq_init(pp, &pp->rxqs[rxq_def]);
+ int err = mvneta_rxq_init(pp, &pp->rxqs[pp->rxq_def]);
if (err) {
netdev_err(pp->dev, "%s: can't create rxq=%d\n",
- __func__, rxq_def);
+ __func__, pp->rxq_def);
mvneta_cleanup_rxqs(pp);
return err;
}
@@ -2609,7 +2610,7 @@ static int mvneta_set_mac_addr(struct net_device *dev, void *addr)
mvneta_mac_addr_set(pp, dev->dev_addr, -1);
/* Set new addr in hw */
- mvneta_mac_addr_set(pp, sockaddr->sa_data, rxq_def);
+ mvneta_mac_addr_set(pp, sockaddr->sa_data, pp->rxq_def);
eth_commit_mac_addr_change(dev, addr);
return 0;
@@ -2728,7 +2729,7 @@ static void mvneta_percpu_elect(struct mvneta_port *pp)
{
int online_cpu_idx, cpu, i = 0;
- online_cpu_idx = rxq_def % num_online_cpus();
+ online_cpu_idx = pp->rxq_def % num_online_cpus();
for_each_online_cpu(cpu) {
if (i == online_cpu_idx)
@@ -3306,6 +3307,8 @@ static int mvneta_probe(struct platform_device *pdev)
strcmp(managed, "in-band-status") == 0);
pp->cpu_notifier.notifier_call = mvneta_percpu_notifier;
+ pp->rxq_def = rxq_def;
+
pp->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(pp->clk)) {
err = PTR_ERR(pp->clk);
--
2.5.0
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH net-next v3 2/4] net: mvneta: Associate RX queues with each CPU
2015-12-09 17:23 [PATCH net-next v3 0/4] mvneta: Introduce RSS support and XPS configuration Gregory CLEMENT
2015-12-09 17:23 ` [PATCH net-next v3 1/4] net: mvneta: Make the default queue related for each port Gregory CLEMENT
@ 2015-12-09 17:23 ` Gregory CLEMENT
2015-12-09 17:23 ` [PATCH net-next v3 3/4] net: mvneta: Add naive RSS support Gregory CLEMENT
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: Gregory CLEMENT @ 2015-12-09 17:23 UTC (permalink / raw)
To: linux-arm-kernel
We enable the percpu interrupt for all the CPU and we just associate a
CPU to a few queue at the neta level. The mapping between the CPUs and
the queues is static. The queues are associated to the CPU module the
number of CPUs. However currently we only use on RX queue for a given
Ethernet port.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
---
drivers/net/ethernet/marvell/mvneta.c | 150 ++++++++++++++++++++++++++--------
1 file changed, 115 insertions(+), 35 deletions(-)
diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index 1c7751917d58..8974ab084839 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -109,9 +109,16 @@
#define MVNETA_CPU_MAP(cpu) (0x2540 + ((cpu) << 2))
#define MVNETA_CPU_RXQ_ACCESS_ALL_MASK 0x000000ff
#define MVNETA_CPU_TXQ_ACCESS_ALL_MASK 0x0000ff00
+#define MVNETA_CPU_RXQ_ACCESS(rxq) BIT(rxq)
#define MVNETA_RXQ_TIME_COAL_REG(q) (0x2580 + ((q) << 2))
-/* Exception Interrupt Port/Queue Cause register */
+/* Exception Interrupt Port/Queue Cause register
+ *
+ * Their behavior depend of the mapping done using the PCPX2Q
+ * registers. For a given CPU if the bit associated to a queue is not
+ * set, then for the register a read from this CPU will always return
+ * 0 and a write won't do anything
+ */
#define MVNETA_INTR_NEW_CAUSE 0x25a0
#define MVNETA_INTR_NEW_MASK 0x25a4
@@ -818,7 +825,13 @@ static void mvneta_port_up(struct mvneta_port *pp)
mvreg_write(pp, MVNETA_TXQ_CMD, q_map);
/* Enable all initialized RXQs. */
- mvreg_write(pp, MVNETA_RXQ_CMD, BIT(pp->rxq_def));
+ for (queue = 0; queue < rxq_number; queue++) {
+ struct mvneta_rx_queue *rxq = &pp->rxqs[queue];
+
+ if (rxq->descs != NULL)
+ q_map |= (1 << queue);
+ }
+ mvreg_write(pp, MVNETA_RXQ_CMD, q_map);
}
/* Stop the Ethernet port activity */
@@ -986,6 +999,7 @@ static void mvneta_defaults_set(struct mvneta_port *pp)
int cpu;
int queue;
u32 val;
+ int max_cpu = num_present_cpus();
/* Clear all Cause registers */
mvreg_write(pp, MVNETA_INTR_NEW_CAUSE, 0);
@@ -1001,13 +1015,23 @@ static void mvneta_defaults_set(struct mvneta_port *pp)
/* Enable MBUS Retry bit16 */
mvreg_write(pp, MVNETA_MBUS_RETRY, 0x20);
- /* Set CPU queue access map - all CPUs have access to all RX
- * queues and to all TX queues
+ /* Set CPU queue access map. CPUs are assigned to the RX
+ * queues modulo their number and all the TX queues are
+ * assigned to the CPU associated to the default RX queue.
*/
- for_each_present_cpu(cpu)
- mvreg_write(pp, MVNETA_CPU_MAP(cpu),
- (MVNETA_CPU_RXQ_ACCESS_ALL_MASK |
- MVNETA_CPU_TXQ_ACCESS_ALL_MASK));
+ for_each_present_cpu(cpu) {
+ int rxq_map = 0, txq_map = 0;
+ int rxq;
+
+ for (rxq = 0; rxq < rxq_number; rxq++)
+ if ((rxq % max_cpu) == cpu)
+ rxq_map |= MVNETA_CPU_RXQ_ACCESS(rxq);
+
+ if (cpu == rxq_def)
+ txq_map = MVNETA_CPU_TXQ_ACCESS_ALL_MASK;
+
+ mvreg_write(pp, MVNETA_CPU_MAP(cpu), rxq_map | txq_map);
+ }
/* Reset RX and TX DMAs */
mvreg_write(pp, MVNETA_PORT_RX_RESET, MVNETA_PORT_RX_DMA_RESET);
@@ -2149,6 +2173,7 @@ static int mvneta_poll(struct napi_struct *napi, int budget)
{
int rx_done = 0;
u32 cause_rx_tx;
+ int rx_queue;
struct mvneta_port *pp = netdev_priv(napi->dev);
struct mvneta_pcpu_port *port = this_cpu_ptr(pp->ports);
@@ -2180,8 +2205,15 @@ static int mvneta_poll(struct napi_struct *napi, int budget)
/* For the case where the last mvneta_poll did not process all
* RX packets
*/
+ rx_queue = fls(((cause_rx_tx >> 8) & 0xff));
+
cause_rx_tx |= port->cause_rx_tx;
- rx_done = mvneta_rx(pp, budget, &pp->rxqs[pp->rxq_def]);
+
+ if (rx_queue) {
+ rx_queue = rx_queue - 1;
+ rx_done = mvneta_rx(pp, budget, &pp->rxqs[rx_queue]);
+ }
+
budget -= rx_done;
if (budget > 0) {
@@ -2394,19 +2426,27 @@ static void mvneta_cleanup_txqs(struct mvneta_port *pp)
/* Cleanup all Rx queues */
static void mvneta_cleanup_rxqs(struct mvneta_port *pp)
{
- mvneta_rxq_deinit(pp, &pp->rxqs[pp->rxq_def]);
+ int queue;
+
+ for (queue = 0; queue < txq_number; queue++)
+ mvneta_rxq_deinit(pp, &pp->rxqs[queue]);
}
/* Init all Rx queues */
static int mvneta_setup_rxqs(struct mvneta_port *pp)
{
- int err = mvneta_rxq_init(pp, &pp->rxqs[pp->rxq_def]);
- if (err) {
- netdev_err(pp->dev, "%s: can't create rxq=%d\n",
- __func__, pp->rxq_def);
- mvneta_cleanup_rxqs(pp);
- return err;
+ int queue;
+
+ for (queue = 0; queue < rxq_number; queue++) {
+ int err = mvneta_rxq_init(pp, &pp->rxqs[queue]);
+
+ if (err) {
+ netdev_err(pp->dev, "%s: can't create rxq=%d\n",
+ __func__, queue);
+ mvneta_cleanup_rxqs(pp);
+ return err;
+ }
}
return 0;
@@ -2430,6 +2470,19 @@ static int mvneta_setup_txqs(struct mvneta_port *pp)
return 0;
}
+static void mvneta_percpu_unmask_interrupt(void *arg)
+{
+ struct mvneta_port *pp = arg;
+
+ /* All the queue are unmasked, but actually only the ones
+ * maped to this CPU will be unmasked
+ */
+ mvreg_write(pp, MVNETA_INTR_NEW_MASK,
+ MVNETA_RX_INTR_MASK_ALL |
+ MVNETA_TX_INTR_MASK_ALL |
+ MVNETA_MISCINTR_INTR_MASK);
+}
+
static void mvneta_start_dev(struct mvneta_port *pp)
{
unsigned int cpu;
@@ -2447,11 +2500,10 @@ static void mvneta_start_dev(struct mvneta_port *pp)
napi_enable(&port->napi);
}
- /* Unmask interrupts */
- mvreg_write(pp, MVNETA_INTR_NEW_MASK,
- MVNETA_RX_INTR_MASK(rxq_number) |
- MVNETA_TX_INTR_MASK(txq_number) |
- MVNETA_MISCINTR_INTR_MASK);
+ /* Unmask interrupts. It has to be done from each CPU */
+ for_each_online_cpu(cpu)
+ smp_call_function_single(cpu, mvneta_percpu_unmask_interrupt,
+ pp, true);
mvreg_write(pp, MVNETA_INTR_MISC_MASK,
MVNETA_CAUSE_PHY_STATUS_CHANGE |
MVNETA_CAUSE_LINK_CHANGE |
@@ -2727,22 +2779,35 @@ static void mvneta_percpu_disable(void *arg)
static void mvneta_percpu_elect(struct mvneta_port *pp)
{
- int online_cpu_idx, cpu, i = 0;
+ int online_cpu_idx, max_cpu, cpu, i = 0;
online_cpu_idx = pp->rxq_def % num_online_cpus();
+ max_cpu = num_present_cpus();
for_each_online_cpu(cpu) {
- if (i == online_cpu_idx)
- /* Enable per-CPU interrupt on the one CPU we
- * just elected
+ int rxq_map = 0, txq_map = 0;
+ int rxq;
+
+ for (rxq = 0; rxq < rxq_number; rxq++)
+ if ((rxq % max_cpu) == cpu)
+ rxq_map |= MVNETA_CPU_RXQ_ACCESS(rxq);
+
+ if (i == online_cpu_idx) {
+ /* Map the default receive queue and transmit
+ * queue to the elected CPU
*/
- smp_call_function_single(cpu, mvneta_percpu_enable,
- pp, true);
- else
- /* Disable per-CPU interrupt on all the other CPU */
- smp_call_function_single(cpu, mvneta_percpu_disable,
- pp, true);
+ rxq_map |= MVNETA_CPU_RXQ_ACCESS(pp->rxq_def);
+ txq_map = MVNETA_CPU_TXQ_ACCESS_ALL_MASK;
+ }
+ mvreg_write(pp, MVNETA_CPU_MAP(cpu), rxq_map | txq_map);
+
+ /* Update the interrupt mask on each CPU according the
+ * new mapping
+ */
+ smp_call_function_single(cpu, mvneta_percpu_unmask_interrupt,
+ pp, true);
i++;
+
}
};
@@ -2777,12 +2842,22 @@ static int mvneta_percpu_notifier(struct notifier_block *nfb,
mvreg_write(pp, MVNETA_INTR_MISC_MASK, 0);
napi_enable(&port->napi);
+
+ /* Enable per-CPU interrupts on the CPU that is
+ * brought up.
+ */
+ smp_call_function_single(cpu, mvneta_percpu_enable,
+ pp, true);
+
/* Enable per-CPU interrupt on the one CPU we care
* about.
*/
mvneta_percpu_elect(pp);
- /* Unmask all ethernet port interrupts */
+ /* Unmask all ethernet port interrupts, as this
+ * notifier is called for each CPU then the CPU to
+ * Queue mapping is applied
+ */
mvreg_write(pp, MVNETA_INTR_NEW_MASK,
MVNETA_RX_INTR_MASK(rxq_number) |
MVNETA_TX_INTR_MASK(txq_number) |
@@ -2833,7 +2908,7 @@ static int mvneta_percpu_notifier(struct notifier_block *nfb,
static int mvneta_open(struct net_device *dev)
{
struct mvneta_port *pp = netdev_priv(dev);
- int ret;
+ int ret, cpu;
pp->pkt_size = MVNETA_RX_PKT_SIZE(pp->dev->mtu);
pp->frag_size = SKB_DATA_ALIGN(MVNETA_RX_BUF_SIZE(pp->pkt_size)) +
@@ -2863,8 +2938,13 @@ static int mvneta_open(struct net_device *dev)
*/
mvneta_percpu_disable(pp);
- /* Elect a CPU to handle our RX queue interrupt */
- mvneta_percpu_elect(pp);
+ /* Enable per-CPU interrupt on all the CPU to handle our RX
+ * queue interrupts
+ */
+ for_each_online_cpu(cpu)
+ smp_call_function_single(cpu, mvneta_percpu_enable,
+ pp, true);
+
/* Register a CPU notifier to handle the case where our CPU
* might be taken offline.
--
2.5.0
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH net-next v3 3/4] net: mvneta: Add naive RSS support
2015-12-09 17:23 [PATCH net-next v3 0/4] mvneta: Introduce RSS support and XPS configuration Gregory CLEMENT
2015-12-09 17:23 ` [PATCH net-next v3 1/4] net: mvneta: Make the default queue related for each port Gregory CLEMENT
2015-12-09 17:23 ` [PATCH net-next v3 2/4] net: mvneta: Associate RX queues with each CPU Gregory CLEMENT
@ 2015-12-09 17:23 ` Gregory CLEMENT
2015-12-09 17:23 ` [PATCH net-next v3 4/4] net: mvneta: Configure XPS support Gregory CLEMENT
2015-12-12 1:28 ` [PATCH net-next v3 0/4] mvneta: Introduce RSS support and XPS configuration David Miller
4 siblings, 0 replies; 6+ messages in thread
From: Gregory CLEMENT @ 2015-12-09 17:23 UTC (permalink / raw)
To: linux-arm-kernel
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>
---
drivers/net/ethernet/marvell/mvneta.c | 127 +++++++++++++++++++++++++++++++++-
1 file changed, 126 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index 8974ab084839..e0dba6869605 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -259,6 +259,11 @@
#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
@@ -380,6 +385,8 @@ struct mvneta_port {
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
@@ -1027,7 +1034,7 @@ static void mvneta_defaults_set(struct mvneta_port *pp)
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);
@@ -2483,6 +2490,18 @@ static void mvneta_percpu_unmask_interrupt(void *arg)
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;
@@ -3173,6 +3192,106 @@ static int mvneta_ethtool_get_sset_count(struct net_device *dev, int sset)
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,
@@ -3197,6 +3316,10 @@ const struct ethtool_ops mvneta_eth_tool_ops = {
.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 */
@@ -3389,6 +3512,8 @@ static int mvneta_probe(struct platform_device *pdev)
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);
--
2.5.0
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH net-next v3 4/4] net: mvneta: Configure XPS support
2015-12-09 17:23 [PATCH net-next v3 0/4] mvneta: Introduce RSS support and XPS configuration Gregory CLEMENT
` (2 preceding siblings ...)
2015-12-09 17:23 ` [PATCH net-next v3 3/4] net: mvneta: Add naive RSS support Gregory CLEMENT
@ 2015-12-09 17:23 ` Gregory CLEMENT
2015-12-12 1:28 ` [PATCH net-next v3 0/4] mvneta: Introduce RSS support and XPS configuration David Miller
4 siblings, 0 replies; 6+ messages in thread
From: Gregory CLEMENT @ 2015-12-09 17:23 UTC (permalink / raw)
To: linux-arm-kernel
With this patch each CPU is associated with its own set of TX queues.
It also setup the XPS with an initial configuration which set the
affinity matching the hardware configuration.
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
---
drivers/net/ethernet/marvell/mvneta.c | 56 ++++++++++++++++++++++++++++-------
1 file changed, 45 insertions(+), 11 deletions(-)
diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index e0dba6869605..b08fe580957e 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -110,6 +110,7 @@
#define MVNETA_CPU_RXQ_ACCESS_ALL_MASK 0x000000ff
#define MVNETA_CPU_TXQ_ACCESS_ALL_MASK 0x0000ff00
#define MVNETA_CPU_RXQ_ACCESS(rxq) BIT(rxq)
+#define MVNETA_CPU_TXQ_ACCESS(txq) BIT(txq + 8)
#define MVNETA_RXQ_TIME_COAL_REG(q) (0x2580 + ((q) << 2))
/* Exception Interrupt Port/Queue Cause register
@@ -512,6 +513,9 @@ struct mvneta_tx_queue {
/* DMA address of TSO headers */
dma_addr_t tso_hdrs_phys;
+
+ /* Affinity mask for CPUs*/
+ cpumask_t affinity_mask;
};
struct mvneta_rx_queue {
@@ -1022,20 +1026,30 @@ static void mvneta_defaults_set(struct mvneta_port *pp)
/* Enable MBUS Retry bit16 */
mvreg_write(pp, MVNETA_MBUS_RETRY, 0x20);
- /* Set CPU queue access map. CPUs are assigned to the RX
- * queues modulo their number and all the TX queues are
- * assigned to the CPU associated to the default RX queue.
+ /* Set CPU queue access map. CPUs are assigned to the RX and
+ * TX queues modulo their number. If there is only one TX
+ * queue then it is assigned to the CPU associated to the
+ * default RX queue.
*/
for_each_present_cpu(cpu) {
int rxq_map = 0, txq_map = 0;
- int rxq;
+ int rxq, txq;
for (rxq = 0; rxq < rxq_number; rxq++)
if ((rxq % max_cpu) == cpu)
rxq_map |= MVNETA_CPU_RXQ_ACCESS(rxq);
- if (cpu == pp->rxq_def)
- txq_map = MVNETA_CPU_TXQ_ACCESS_ALL_MASK;
+ for (txq = 0; txq < txq_number; txq++)
+ if ((txq % max_cpu) == cpu)
+ txq_map |= MVNETA_CPU_TXQ_ACCESS(txq);
+
+ /* With only one TX queue we configure a special case
+ * which will allow to get all the irq on a single
+ * CPU
+ */
+ if (txq_number == 1)
+ txq_map = (cpu == pp->rxq_def) ?
+ MVNETA_CPU_TXQ_ACCESS(1) : 0;
mvreg_write(pp, MVNETA_CPU_MAP(cpu), rxq_map | txq_map);
}
@@ -2337,6 +2351,8 @@ static void mvneta_rxq_deinit(struct mvneta_port *pp,
static int mvneta_txq_init(struct mvneta_port *pp,
struct mvneta_tx_queue *txq)
{
+ int cpu;
+
txq->size = pp->tx_ring_size;
/* A queue must always have room for at least one skb.
@@ -2389,6 +2405,14 @@ static int mvneta_txq_init(struct mvneta_port *pp,
}
mvneta_tx_done_pkts_coal_set(pp, txq, txq->done_pkts_coal);
+ /* Setup XPS mapping */
+ if (txq_number > 1)
+ cpu = txq->id % num_present_cpus();
+ else
+ cpu = pp->rxq_def % num_present_cpus();
+ cpumask_set_cpu(cpu, &txq->affinity_mask);
+ netif_set_xps_queue(pp->dev, &txq->affinity_mask, txq->id);
+
return 0;
}
@@ -2811,13 +2835,23 @@ static void mvneta_percpu_elect(struct mvneta_port *pp)
if ((rxq % max_cpu) == cpu)
rxq_map |= MVNETA_CPU_RXQ_ACCESS(rxq);
- if (i == online_cpu_idx) {
- /* Map the default receive queue and transmit
- * queue to the elected CPU
+ if (i == online_cpu_idx)
+ /* Map the default receive queue queue to the
+ * elected CPU
*/
rxq_map |= MVNETA_CPU_RXQ_ACCESS(pp->rxq_def);
- txq_map = MVNETA_CPU_TXQ_ACCESS_ALL_MASK;
- }
+
+ /* We update the TX queue map only if we have one
+ * queue. In this case we associate the TX queue to
+ * the CPU bound to the default RX queue
+ */
+ if (txq_number == 1)
+ txq_map = (i == online_cpu_idx) ?
+ MVNETA_CPU_TXQ_ACCESS(1) : 0;
+ else
+ txq_map = mvreg_read(pp, MVNETA_CPU_MAP(cpu)) &
+ MVNETA_CPU_TXQ_ACCESS_ALL_MASK;
+
mvreg_write(pp, MVNETA_CPU_MAP(cpu), rxq_map | txq_map);
/* Update the interrupt mask on each CPU according the
--
2.5.0
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH net-next v3 0/4] mvneta: Introduce RSS support and XPS configuration
2015-12-09 17:23 [PATCH net-next v3 0/4] mvneta: Introduce RSS support and XPS configuration Gregory CLEMENT
` (3 preceding siblings ...)
2015-12-09 17:23 ` [PATCH net-next v3 4/4] net: mvneta: Configure XPS support Gregory CLEMENT
@ 2015-12-12 1:28 ` David Miller
4 siblings, 0 replies; 6+ messages in thread
From: David Miller @ 2015-12-12 1:28 UTC (permalink / raw)
To: linux-arm-kernel
From: Gregory CLEMENT <gregory.clement@free-electrons.com>
Date: Wed, 9 Dec 2015 18:23:47 +0100
> this series is the first step add RSS support on mvneta.
Series applied.
^ permalink raw reply [flat|nested] 6+ messages in thread