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ethtool: Expand documentation of struct ethtool_ringparam

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Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ben Hutchings 2014-02-12 22:14:23 +00:00 committed by David S. Miller
parent c8364a63f6
commit af440a8aed
1 changed files with 26 additions and 11 deletions
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37
include/uapi/linux/ethtool.h
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@ -401,22 +401,37 @@ struct ethtool_coalesce {
__u32 rate_sample_interval; __u32 rate_sample_interval;
}; };
/* for configuring RX/TX ring parameters */ /**
* struct ethtool_ringparam - RX/TX ring parameters
* @cmd: Command number = %ETHTOOL_GRINGPARAM or %ETHTOOL_SRINGPARAM
* @rx_max_pending: Maximum supported number of pending entries per
* RX ring. Read-only.
* @rx_mini_max_pending: Maximum supported number of pending entries
* per RX mini ring. Read-only.
* @rx_jumbo_max_pending: Maximum supported number of pending entries
* per RX jumbo ring. Read-only.
* @tx_max_pending: Maximum supported number of pending entries per
* TX ring. Read-only.
* @rx_pending: Current maximum number of pending entries per RX ring
* @rx_mini_pending: Current maximum number of pending entries per RX
* mini ring
* @rx_jumbo_pending: Current maximum number of pending entries per RX
* jumbo ring
* @tx_pending: Current maximum supported number of pending entries
* per TX ring
*
* If the interface does not have separate RX mini and/or jumbo rings,
* @rx_mini_max_pending and/or @rx_jumbo_max_pending will be 0.
*
* There may also be driver-dependent minimum values for the number
* of entries per ring.
*/
struct ethtool_ringparam { struct ethtool_ringparam {
__u32 cmd; /* ETHTOOL_{G,S}RINGPARAM */ __u32 cmd;
/* Read only attributes. These indicate the maximum number
* of pending RX/TX ring entries the driver will allow the
* user to set.
*/
__u32 rx_max_pending; __u32 rx_max_pending;
__u32 rx_mini_max_pending; __u32 rx_mini_max_pending;
__u32 rx_jumbo_max_pending; __u32 rx_jumbo_max_pending;
__u32 tx_max_pending; __u32 tx_max_pending;
/* Values changeable by the user. The valid values are
* in the range 1 to the "*_max_pending" counterpart above.
*/
__u32 rx_pending; __u32 rx_pending;
__u32 rx_mini_pending; __u32 rx_mini_pending;
__u32 rx_jumbo_pending; __u32 rx_jumbo_pending;