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net/tap: support RSS hash update

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Add RSS hash update callback to eth_dev_ops.

Signed-off-by: Ophir Munk <ophirmu@mellanox.com>
Acked-by: Keith Wiles <keith.wiles@intel.com>
This commit is contained in:
Ophir Munk 2018-05-10 17:30:25 +00:00 committed by Ferruh Yigit
parent 115ae7689f
commit 2f5045c51c
2 changed files with 39 additions and 3 deletions
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39
drivers/net/tap/rte_eth_tap.c
View File

@ -718,11 +718,10 @@ tap_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
dev_info->tx_queue_offload_capa;
dev_info->hash_key_size = TAP_RSS_HASH_KEY_SIZE;
/*
* limitation: TAP suppors all of the following hash
* limitation: TAP supports all of IP, UDP and TCP hash
* functions together and not in partial combinations
*/
dev_info->flow_type_rss_offloads =
ETH_RSS_IP | ETH_RSS_UDP | ETH_RSS_TCP;
dev_info->flow_type_rss_offloads = ~TAP_RSS_HF_MASK;
}
static int
@ -1270,6 +1269,39 @@ tap_flow_ctrl_set(struct rte_eth_dev *dev __rte_unused,
return 0;
}
/**
* DPDK callback to update the RSS hash configuration.
*
* @param dev
* Pointer to Ethernet device structure.
* @param[in] rss_conf
* RSS configuration data.
*
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
static int
tap_rss_hash_update(struct rte_eth_dev *dev,
struct rte_eth_rss_conf *rss_conf)
{
if (rss_conf->rss_hf & TAP_RSS_HF_MASK) {
rte_errno = EINVAL;
return -rte_errno;
}
if (rss_conf->rss_key && rss_conf->rss_key_len) {
/*
* Currently TAP RSS key is hard coded
* and cannot be updated
*/
TAP_LOG(ERR,
"port %u RSS key cannot be updated",
dev->data->port_id);
rte_errno = EINVAL;
return -rte_errno;
}
return 0;
}
static const struct eth_dev_ops ops = {
.dev_start = tap_dev_start,
.dev_stop = tap_dev_stop,
@ -1295,6 +1327,7 @@ static const struct eth_dev_ops ops = {
.stats_get = tap_stats_get,
.stats_reset = tap_stats_reset,
.dev_supported_ptypes_get = tap_dev_supported_ptypes_get,
.rss_hash_update = tap_rss_hash_update,
.filter_ctrl = tap_dev_filter_ctrl,
};

3
drivers/net/tap/tap_rss.h
View File

@ -12,6 +12,9 @@
/* Fixed RSS hash key size in bytes. */
#define TAP_RSS_HASH_KEY_SIZE 40
/* Supported RSS */
#define TAP_RSS_HF_MASK (~(ETH_RSS_IP | ETH_RSS_UDP | ETH_RSS_TCP))
/* hashed fields for RSS */
enum hash_field {
HASH_FIELD_IPV4_L3, /* IPv4 src/dst addr */