This covers kernel changes up to commit 84a1d9c48200,
    net: ethtool: extend RXNFC API to support RSS spreading of filter matches

Signed-off-by: Edward Cree <ec...@solarflare.com>
---
 ethtool-copy.h | 32 ++++++++++++++++++++++++++------
 1 file changed, 26 insertions(+), 6 deletions(-)

diff --git a/ethtool-copy.h b/ethtool-copy.h
index f4e7bb2..8cc61e9 100644
--- a/ethtool-copy.h
+++ b/ethtool-copy.h
@@ -912,12 +912,15 @@ static __inline__ __u64 
ethtool_get_flow_spec_ring_vf(__u64 ring_cookie)
  * @flow_type: Type of flow to be affected, e.g. %TCP_V4_FLOW
  * @data: Command-dependent value
  * @fs: Flow classification rule
+ * @rss_context: RSS context to be affected
  * @rule_cnt: Number of rules to be affected
  * @rule_locs: Array of used rule locations
  *
  * For %ETHTOOL_GRXFH and %ETHTOOL_SRXFH, @data is a bitmask indicating
  * the fields included in the flow hash, e.g. %RXH_IP_SRC.  The following
- * structure fields must not be used.
+ * structure fields must not be used, except that if @flow_type includes
+ * the %FLOW_RSS flag, then @rss_context determines which RSS context to
+ * act on.
  *
  * For %ETHTOOL_GRXRINGS, @data is set to the number of RX rings/queues
  * on return.
@@ -929,7 +932,9 @@ static __inline__ __u64 ethtool_get_flow_spec_ring_vf(__u64 
ring_cookie)
  * set in @data then special location values should not be used.
  *
  * For %ETHTOOL_GRXCLSRULE, @fs.@location specifies the location of an
- * existing rule on entry and @fs contains the rule on return.
+ * existing rule on entry and @fs contains the rule on return; if
+ * @fs.@flow_type includes the %FLOW_RSS flag, then @rss_context is
+ * filled with the RSS context ID associated with the rule.
  *
  * For %ETHTOOL_GRXCLSRLALL, @rule_cnt specifies the array size of the
  * user buffer for @rule_locs on entry.  On return, @data is the size
@@ -940,7 +945,11 @@ static __inline__ __u64 
ethtool_get_flow_spec_ring_vf(__u64 ring_cookie)
  * For %ETHTOOL_SRXCLSRLINS, @fs specifies the rule to add or update.
  * @fs.@location either specifies the location to use or is a special
  * location value with %RX_CLS_LOC_SPECIAL flag set.  On return,
- * @fs.@location is the actual rule location.
+ * @fs.@location is the actual rule location.  If @fs.@flow_type
+ * includes the %FLOW_RSS flag, @rss_context is the RSS context ID to
+ * use for flow spreading traffic which matches this rule.  The value
+ * from the rxfh indirection table will be added to @fs.@ring_cookie
+ * to choose which ring to deliver to.
  *
  * For %ETHTOOL_SRXCLSRLDEL, @fs.@location specifies the location of an
  * existing rule on entry.
@@ -961,7 +970,10 @@ struct ethtool_rxnfc {
        __u32                           flow_type;
        __u64                           data;
        struct ethtool_rx_flow_spec     fs;
-       __u32                           rule_cnt;
+       union {
+               __u32                   rule_cnt;
+               __u32                   rss_context;
+       };
        __u32                           rule_locs[0];
 };
 
@@ -988,7 +1000,11 @@ struct ethtool_rxfh_indir {
 /**
  * struct ethtool_rxfh - command to get/set RX flow hash indir or/and hash key.
  * @cmd: Specific command number - %ETHTOOL_GRSSH or %ETHTOOL_SRSSH
- * @rss_context: RSS context identifier.
+ * @rss_context: RSS context identifier.  Context 0 is the default for normal
+ *     traffic; other contexts can be referenced as the destination for RX flow
+ *     classification rules.  %ETH_RXFH_CONTEXT_ALLOC is used with command
+ *     %ETHTOOL_SRSSH to allocate a new RSS context; on return this field will
+ *     contain the ID of the newly allocated context.
  * @indir_size: On entry, the array size of the user buffer for the
  *     indirection table, which may be zero, or (for %ETHTOOL_SRSSH),
  *     %ETH_RXFH_INDIR_NO_CHANGE.  On return from %ETHTOOL_GRSSH,
@@ -1007,7 +1023,8 @@ struct ethtool_rxfh_indir {
  * size should be returned.  For %ETHTOOL_SRSSH, an @indir_size of
  * %ETH_RXFH_INDIR_NO_CHANGE means that indir table setting is not requested
  * and a @indir_size of zero means the indir table should be reset to default
- * values. An hfunc of zero means that hash function setting is not requested.
+ * values (if @rss_context == 0) or that the RSS context should be deleted.
+ * An hfunc of zero means that hash function setting is not requested.
  */
 struct ethtool_rxfh {
        __u32   cmd;
@@ -1019,6 +1036,7 @@ struct ethtool_rxfh {
        __u32   rsvd32;
        __u32   rss_config[0];
 };
+#define ETH_RXFH_CONTEXT_ALLOC         0xffffffff
 #define ETH_RXFH_INDIR_NO_CHANGE       0xffffffff
 
 /**
@@ -1633,6 +1651,8 @@ static __inline__ int ethtool_validate_duplex(__u8 duplex)
 /* Flag to enable additional fields in struct ethtool_rx_flow_spec */
 #define        FLOW_EXT        0x80000000
 #define        FLOW_MAC_EXT    0x40000000
+/* Flag to enable RSS spreading of traffic matching rule (nfc only) */
+#define        FLOW_RSS        0x20000000
 
 /* L3-L4 network traffic flow hash options */
 #define        RXH_L2DA        (1 << 1)

Reply via email to