[dpdk-dev] [PATCH 2/8] ring: dynamic rss configuration

[Tomasz Kulasek <tomaszx.kulasek@intel.com>]

This implementation allows to set and read RSS configuration for ring device,
and is used to validate right values propagation over the slaves, in test units
for dynamic RSS configuration for bonding.

It have no impact on packet processing by ring device.

Signed-off-by: Tomasz Kulasek <tomaszx.kulasek@intel.com>
---
 drivers/net/ring/rte_eth_ring.c |  122 +++++++++++++++++++++++++++++++++++++--
 1 file changed, 118 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ring/rte_eth_ring.c b/drivers/net/ring/rte_eth_ring.c
index 6832f01..6d2182f 100644
--- a/drivers/net/ring/rte_eth_ring.c
+++ b/drivers/net/ring/rte_eth_ring.c
@@ -39,6 +39,7 @@
 #include <rte_string_fns.h>
 #include <rte_dev.h>
 #include <rte_kvargs.h>
+#include <rte_spinlock.h>
 
 #define ETH_RING_NUMA_NODE_ACTION_ARG	"nodeaction"
 #define ETH_RING_ACTION_CREATE		"CREATE"
@@ -66,6 +67,17 @@ struct pmd_internals {
 	struct ring_queue tx_ring_queues[RTE_PMD_RING_MAX_TX_RINGS];
 
 	struct ether_addr address;
+
+	/** Bit mask of RSS offloads, the bit offset also means flow type */
+	uint64_t flow_type_rss_offloads;
+
+	rte_spinlock_t rss_lock;
+
+	uint16_t reta_size;
+	struct rte_eth_rss_reta_entry64 reta_conf[ETH_RSS_RETA_SIZE_128 /
+			RTE_RETA_GROUP_SIZE];
+
+	uint8_t rss_key[40];                /**< 40-byte hash key. */
 };
 
 
@@ -173,6 +185,8 @@ eth_dev_info(struct rte_eth_dev *dev,
 	dev_info->max_tx_queues = (uint16_t)internals->nb_tx_queues;
 	dev_info->min_rx_bufsize = 0;
 	dev_info->pci_dev = NULL;
+    dev_info->flow_type_rss_offloads = internals->flow_type_rss_offloads;
+	dev_info->reta_size = ETH_RSS_RETA_SIZE_128;
 }
 
 static void
@@ -234,6 +248,93 @@ static int
 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 		int wait_to_complete __rte_unused) { return 0; }
 
+static int
+eth_rss_reta_update(struct rte_eth_dev *dev,
+			  struct rte_eth_rss_reta_entry64 *reta_conf,
+			  uint16_t reta_size)
+{
+	int i, j;
+	struct pmd_internals *internal = dev->data->dev_private;
+
+	if (reta_size != internal->reta_size)
+		return -EINVAL;
+
+	rte_spinlock_lock(&internal->rss_lock);
+
+	/* Copy RETA table */
+	for (i = 0; i < (internal->reta_size / RTE_RETA_GROUP_SIZE); i++) {
+		internal->reta_conf[i].mask = reta_conf[i].mask;
+		for (j = 0; j < RTE_RETA_GROUP_SIZE; j++)
+			if ((reta_conf[i].mask >> j) & 0x01)
+				internal->reta_conf[i].reta[j] = reta_conf[i].reta[j];
+	}
+
+	rte_spinlock_unlock(&internal->rss_lock);
+
+	return 0;
+}
+
+static int
+eth_rss_reta_query(struct rte_eth_dev *dev,
+		struct rte_eth_rss_reta_entry64 *reta_conf,
+		uint16_t reta_size)
+{
+	int i, j;
+	struct pmd_internals *internal = dev->data->dev_private;
+
+	if (reta_size != internal->reta_size) return -EINVAL;
+
+	rte_spinlock_lock(&internal->rss_lock);
+
+	/* Copy RETA table */
+	for (i = 0; i < (internal->reta_size / RTE_RETA_GROUP_SIZE); i++) {
+		for (j = 0; j < RTE_RETA_GROUP_SIZE; j++)
+			if ((reta_conf[i].mask >> j) & 0x01)
+				reta_conf[i].reta[j] = internal->reta_conf[i].reta[j];
+	}
+
+	rte_spinlock_unlock(&internal->rss_lock);
+
+	return 0;
+}
+
+static int
+eth_rss_hash_update(struct rte_eth_dev *dev,
+			  struct rte_eth_rss_conf *rss_conf)
+{
+	struct pmd_internals *internal = dev->data->dev_private;
+
+	rte_spinlock_lock(&internal->rss_lock);
+
+	if ((rss_conf->rss_hf & internal->flow_type_rss_offloads) != 0)
+		dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf =
+				rss_conf->rss_hf & internal->flow_type_rss_offloads;
+
+	if (rss_conf->rss_key != NULL)
+		memcpy(internal->rss_key, rss_conf->rss_key, 40);
+
+	rte_spinlock_unlock(&internal->rss_lock);
+
+	return 0;
+}
+
+static int
+eth_rss_hash_conf_get(struct rte_eth_dev *dev,
+		struct rte_eth_rss_conf *rss_conf)
+{
+	struct pmd_internals *internal = dev->data->dev_private;
+
+	rte_spinlock_lock(&internal->rss_lock);
+
+	rss_conf->rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
+	if (rss_conf->rss_key != NULL)
+		memcpy(rss_conf->rss_key, internal->rss_key, 40);
+
+	rte_spinlock_unlock(&internal->rss_lock);
+
+	return 0;
+}
+
 static const struct eth_dev_ops ops = {
 	.dev_start = eth_dev_start,
 	.dev_stop = eth_dev_stop,
@@ -250,6 +351,10 @@ static const struct eth_dev_ops ops = {
 	.stats_reset = eth_stats_reset,
 	.mac_addr_remove = eth_mac_addr_remove,
 	.mac_addr_add = eth_mac_addr_add,
+	.reta_update = eth_rss_reta_update,
+	.reta_query = eth_rss_reta_query,
+	.rss_hash_update = eth_rss_hash_update,
+	.rss_hash_conf_get = eth_rss_hash_conf_get
 };
 
 int
@@ -268,6 +373,13 @@ rte_eth_from_rings(const char *name, struct rte_ring *const rx_queues[],
 
 	unsigned i;
 
+	static const uint8_t default_rss_key[40] = {
+		0x6D, 0x5A, 0x56, 0xDA, 0x25, 0x5B, 0x0E, 0xC2, 0x41, 0x67, 0x25, 0x3D,
+		0x43, 0xA3, 0x8F, 0xB0, 0xD0, 0xCA, 0x2B, 0xCB, 0xAE, 0x7B, 0x30, 0xB4,
+		0x77, 0xCB, 0x2D, 0xA3, 0x80, 0x30, 0xF2, 0x0C, 0x6A, 0x42, 0xB7, 0x3B,
+		0xBE, 0xAC, 0x01, 0xFA
+	};
+
 	/* do some parameter checking */
 	if (rx_queues == NULL && nb_rx_queues > 0)
 		goto error;
@@ -316,12 +428,14 @@ rte_eth_from_rings(const char *name, struct rte_ring *const rx_queues[],
 
 	internals->nb_rx_queues = nb_rx_queues;
 	internals->nb_tx_queues = nb_tx_queues;
-	for (i = 0; i < nb_rx_queues; i++) {
+	for (i = 0; i < nb_rx_queues; i++)
 		internals->rx_ring_queues[i].rng = rx_queues[i];
-	}
-	for (i = 0; i < nb_tx_queues; i++) {
+	for (i = 0; i < nb_tx_queues; i++)
 		internals->tx_ring_queues[i].rng = tx_queues[i];
-	}
+	internals->flow_type_rss_offloads =  ETH_RSS_PROTO_MASK;
+	internals->reta_size = ETH_RSS_RETA_SIZE_128;
+
+	memcpy(internals->rss_key, default_rss_key, 40);
 
 	eth_drv->pci_drv.name = ring_ethdev_driver_name;
 	eth_drv->pci_drv.id_table = id_table;
-- 
1.7.9.5