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)
