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authorHyong Youb Kim <hyonkim@cisco.com>2019-03-02 02:42:44 -0800
committerFerruh Yigit <ferruh.yigit@intel.com>2019-03-08 17:52:22 +0100
commite9434f6f60052519cffb6f447c694da5eba24a47 (patch)
treec5362c98a347a429ab443cbc95bb9ae6f0a5844a
parent4d8e9aa48328edb58f8a843a8e6bee327e12d181 (diff)
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net/enic: enable limited RSS flow action
Some apps like OVS-DPDK use MARK+RSS flow rules in order to offload packet matching to the NIC. The RSS action in such flow rules simply indicates "receive packet normally", not trying to override the port wide RSS. The action is included in the flow rules simply to terminate them, as MARK is not a fate-deciding action. And, the RSS action has a most basic config: default hash, level, types, null key, and identity queue mapping. Recent VIC adapters can support these "mark and receive" flow rules. So, enable support for RSS action for this limited use case. Signed-off-by: Hyong Youb Kim <hyonkim@cisco.com> Reviewed-by: John Daley <johndale@cisco.com>
-rw-r--r--doc/guides/nics/enic.rst2
-rw-r--r--doc/guides/rel_notes/release_19_05.rst4
-rw-r--r--drivers/net/enic/enic_flow.c48
3 files changed, 47 insertions, 7 deletions
diff --git a/doc/guides/nics/enic.rst b/doc/guides/nics/enic.rst
index e456e6c..ed093ef 100644
--- a/doc/guides/nics/enic.rst
+++ b/doc/guides/nics/enic.rst
@@ -256,7 +256,7 @@ Generic Flow API is supported. The baseline support is:
- Attributes: ingress
- Items: eth, ipv4, ipv6, udp, tcp, vxlan, inner eth, ipv4, ipv6, udp, tcp
- - Actions: queue, mark, drop, flag and void
+ - Actions: queue, mark, drop, flag, rss, and void
- Selectors: 'is', 'spec' and 'mask'. 'last' is not supported
- In total, up to 64 bytes of mask is allowed across all headers
diff --git a/doc/guides/rel_notes/release_19_05.rst b/doc/guides/rel_notes/release_19_05.rst
index 4a3e2a7..4a73f29 100644
--- a/doc/guides/rel_notes/release_19_05.rst
+++ b/doc/guides/rel_notes/release_19_05.rst
@@ -77,6 +77,10 @@ New Features
which includes the directory name, lib name, filenames, makefile, docs,
macros, functions, structs and any other strings in the code.
+* **Updated the enic driver.**
+
+ * Added limited support for RSS.
+
Removed Items
-------------
diff --git a/drivers/net/enic/enic_flow.c b/drivers/net/enic/enic_flow.c
index c60476c..0f6b6b9 100644
--- a/drivers/net/enic/enic_flow.c
+++ b/drivers/net/enic/enic_flow.c
@@ -45,7 +45,8 @@ struct enic_filter_cap {
};
/* functions for copying flow actions into enic actions */
-typedef int (copy_action_fn)(const struct rte_flow_action actions[],
+typedef int (copy_action_fn)(struct enic *enic,
+ const struct rte_flow_action actions[],
struct filter_action_v2 *enic_action);
/* functions for copying items into enic filters */
@@ -57,8 +58,7 @@ struct enic_action_cap {
/** list of valid actions */
const enum rte_flow_action_type *actions;
/** copy function for a particular NIC */
- int (*copy_fn)(const struct rte_flow_action actions[],
- struct filter_action_v2 *enic_action);
+ copy_action_fn *copy_fn;
};
/* Forward declarations */
@@ -282,6 +282,7 @@ static const enum rte_flow_action_type enic_supported_actions_v2_id[] = {
RTE_FLOW_ACTION_TYPE_QUEUE,
RTE_FLOW_ACTION_TYPE_MARK,
RTE_FLOW_ACTION_TYPE_FLAG,
+ RTE_FLOW_ACTION_TYPE_RSS,
RTE_FLOW_ACTION_TYPE_END,
};
@@ -290,6 +291,7 @@ static const enum rte_flow_action_type enic_supported_actions_v2_drop[] = {
RTE_FLOW_ACTION_TYPE_MARK,
RTE_FLOW_ACTION_TYPE_FLAG,
RTE_FLOW_ACTION_TYPE_DROP,
+ RTE_FLOW_ACTION_TYPE_RSS,
RTE_FLOW_ACTION_TYPE_END,
};
@@ -299,6 +301,7 @@ static const enum rte_flow_action_type enic_supported_actions_v2_count[] = {
RTE_FLOW_ACTION_TYPE_FLAG,
RTE_FLOW_ACTION_TYPE_DROP,
RTE_FLOW_ACTION_TYPE_COUNT,
+ RTE_FLOW_ACTION_TYPE_RSS,
RTE_FLOW_ACTION_TYPE_END,
};
@@ -1016,7 +1019,8 @@ stacking_error:
* @param error[out]
*/
static int
-enic_copy_action_v1(const struct rte_flow_action actions[],
+enic_copy_action_v1(__rte_unused struct enic *enic,
+ const struct rte_flow_action actions[],
struct filter_action_v2 *enic_action)
{
enum { FATE = 1, };
@@ -1062,7 +1066,8 @@ enic_copy_action_v1(const struct rte_flow_action actions[],
* @param error[out]
*/
static int
-enic_copy_action_v2(const struct rte_flow_action actions[],
+enic_copy_action_v2(struct enic *enic,
+ const struct rte_flow_action actions[],
struct filter_action_v2 *enic_action)
{
enum { FATE = 1, MARK = 2, };
@@ -1128,6 +1133,37 @@ enic_copy_action_v2(const struct rte_flow_action actions[],
enic_action->flags |= FILTER_ACTION_COUNTER_FLAG;
break;
}
+ case RTE_FLOW_ACTION_TYPE_RSS: {
+ const struct rte_flow_action_rss *rss =
+ (const struct rte_flow_action_rss *)
+ actions->conf;
+ bool allow;
+ uint16_t i;
+
+ /*
+ * Hardware does not support general RSS actions, but
+ * we can still support the dummy one that is used to
+ * "receive normally".
+ */
+ allow = rss->func == RTE_ETH_HASH_FUNCTION_DEFAULT &&
+ rss->level == 0 &&
+ (rss->types == 0 ||
+ rss->types == enic->rss_hf) &&
+ rss->queue_num == enic->rq_count &&
+ rss->key_len == 0;
+ /* Identity queue map is ok */
+ for (i = 0; i < rss->queue_num; i++)
+ allow = allow && (i == rss->queue[i]);
+ if (!allow)
+ return ENOTSUP;
+ if (overlap & FATE)
+ return ENOTSUP;
+ /* Need MARK or FLAG */
+ if (!(overlap & MARK))
+ return ENOTSUP;
+ overlap |= FATE;
+ break;
+ }
case RTE_FLOW_ACTION_TYPE_VOID:
continue;
default:
@@ -1418,7 +1454,7 @@ enic_flow_parse(struct rte_eth_dev *dev,
action, "Invalid action.");
return -rte_errno;
}
- ret = enic_action_cap->copy_fn(actions, enic_action);
+ ret = enic_action_cap->copy_fn(enic, actions, enic_action);
if (ret) {
rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_HANDLE,
NULL, "Unsupported action.");