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ethtool: Support for configurable RSS hash key

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This ethtool patch primarily copies the ioctl command data structures
from/to the User space and invokes the driver hook.

Signed-off-by: Venkat Duvvuru <VenkatKumar.Duvvuru@Emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Venkata Duvvuru
2014-04-21 15:37:59 +05:30
committed by David S. Miller
parent 862aa49164
commit 3de0b59239
3 changed files with 253 additions and 15 deletions
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32
include/uapi/linux/ethtool.h
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@@ -846,6 +846,35 @@ struct ethtool_rxfh_indir {
__u32 ring_index[0];
};
/**
* 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.
* @indir_size: On entry, the array size of the user buffer, which may be zero.
* On return from %ETHTOOL_GRSSH, the array size of the hardware
* indirection table.
* @key_size: On entry, the array size of the user buffer in bytes,
* which may be zero.
* On return from %ETHTOOL_GRSSH, the size of the RSS hash key.
* @rsvd: Reserved for future extensions.
* @rss_config: RX ring/queue index for each hash value i.e., indirection table
* of size @indir_size followed by hash key of size @key_size.
*
* For %ETHTOOL_GRSSH, a @indir_size and key_size of zero means that only the
* size should be returned. For %ETHTOOL_SRSSH, a @indir_size of 0xDEADBEEF
* means that indir table setting is not requested and a @indir_size of zero
* means the indir table should be reset to default values. This last feature
* is not supported by the original implementations.
*/
struct ethtool_rxfh {
__u32 cmd;
__u32 rss_context;
__u32 indir_size;
__u32 key_size;
__u32 rsvd[2];
__u32 rss_config[0];
};
/**
* struct ethtool_rx_ntuple_flow_spec - specification for RX flow filter
* @flow_type: Type of match to perform, e.g. %TCP_V4_FLOW
@@ -1118,6 +1147,9 @@ enum ethtool_sfeatures_retval_bits {
#define ETHTOOL_GEEE 0x00000044 /* Get EEE settings */
#define ETHTOOL_SEEE 0x00000045 /* Set EEE settings */
#define ETHTOOL_GRSSH 0x00000046 /* Get RX flow hash configuration */
#define ETHTOOL_SRSSH 0x00000047 /* Set RX flow hash configuration */
/* compatibility with older code */
#define SPARC_ETH_GSET ETHTOOL_GSET
#define SPARC_ETH_SSET ETHTOOL_SSET