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ethtool: Expand documentation of ethtool_ops::{get,set}_rxfh()

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Some corner-cases are not explained properly.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
This commit is contained in:
Ben Hutchings 2014-05-19 01:25:59 +01:00
parent 38c891a49d
commit 678e30df2e
1 changed files with 9 additions and 8 deletions
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17
include/linux/ethtool.h
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@ -162,15 +162,16 @@ static inline u32 ethtool_rxfh_indir_default(u32 index, u32 n_rx_rings)
* Will not be called if @get_rxfh_indir_size returns zero.
* @get_rxfh: Get the contents of the RX flow hash indirection table and hash
* key.
* Will not be called if @get_rxfh_indir_size and @get_rxfh_key_size
* returns zero.
* Will only be called if one or both of @get_rxfh_indir_size and
* @get_rxfh_key_size are implemented and return non-zero.
* Returns a negative error code or zero.
* @set_rxfh_indir: Set the contents of the RX flow hash indirection table.
* Will not be called if @get_rxfh_indir_size returns zero.
* @set_rxfh: Set the contents of the RX flow hash indirection table and
* hash key.
* Will not be called if @get_rxfh_indir_size and @get_rxfh_key_size
* returns zero.
* @set_rxfh: Set the contents of the RX flow hash indirection table and/or
* hash key. Either or both arguments may be %NULL if that attribute
* is not to be changed.
* Will only be called if one or both of @get_rxfh_indir_size and
* @get_rxfh_key_size are implemented and return non-zero.
* Returns a negative error code or zero.
* @get_channels: Get number of channels.
* @set_channels: Set number of channels. Returns a negative error code or
@ -244,8 +245,8 @@ struct ethtool_ops {
int (*reset)(struct net_device *, u32 *);
u32 (*get_rxfh_key_size)(struct net_device *);
u32 (*get_rxfh_indir_size)(struct net_device *);
int (*get_rxfh)(struct net_device *, u32 *, u8 *);
int (*set_rxfh)(struct net_device *, u32 *, u8 *);
int (*get_rxfh)(struct net_device *, u32 *indir, u8 *key);
int (*set_rxfh)(struct net_device *, u32 *indir, u8 *key);
int (*get_rxfh_indir)(struct net_device *, u32 *);
int (*set_rxfh_indir)(struct net_device *, const u32 *);
void (*get_channels)(struct net_device *, struct ethtool_channels *);