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ethtool: Expand documentation of struct ethtool_test

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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 22:14:38 +00:00 • committed by David S. Miller
commit 4e5a62db2b
1 changed files with 17 additions and 4 deletions
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21
include/uapi/linux/ethtool.h
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@ -575,12 +575,25 @@ enum ethtool_test_flags {
ETH_TEST_FL_EXTERNAL_LB_DONE = (1 << 3),
};
/* for requesting NIC test and getting results*/
/**
* struct ethtool_test - device self-test invocation
* @cmd: Command number = %ETHTOOL_TEST
* @flags: A bitmask of flags from &enum ethtool_test_flags. Some
* flags may be set by the user on entry; others may be set by
* the driver on return.
* @len: On return, the number of test results
* @data: Array of test results
*
* Users must use %ETHTOOL_GSSET_INFO or %ETHTOOL_GDRVINFO to find the
* number of test results that will be returned. They must allocate a
* buffer of the appropriate size (8 * number of results) immediately
* following this structure.
*/
struct ethtool_test {
__u32 cmd; /* ETHTOOL_TEST */
__u32 flags; /* ETH_TEST_FL_xxx */
__u32 cmd;
__u32 flags;
__u32 reserved;
__u32 len; /* result length, in number of u64 elements */
__u32 len;
__u64 data[0];
};