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ethtool: Expand documentation of struct ethtool_eeprom

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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 22:14:17 +00:00 • committed by David S. Miller
commit c8364a63f6
1 changed files with 20 additions and 3 deletions
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23
include/uapi/linux/ethtool.h
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@ -231,12 +231,29 @@ struct ethtool_regs {
__u8 data[0];
};
/* for passing EEPROM chunks */
/**
* struct ethtool_eeprom - EEPROM dump
* @cmd: Command number = %ETHTOOL_GEEPROM, %ETHTOOL_GMODULEEEPROM or
* %ETHTOOL_SEEPROM
* @magic: A 'magic cookie' value to guard against accidental changes.
* The value passed in to %ETHTOOL_SEEPROM must match the value
* returned by %ETHTOOL_GEEPROM for the same device. This is
* unused when @cmd is %ETHTOOL_GMODULEEEPROM.
* @offset: Offset within the EEPROM to begin reading/writing, in bytes
* @len: On entry, number of bytes to read/write. On successful
* return, number of bytes actually read/written. In case of
* error, this may indicate at what point the error occurred.
* @data: Buffer to read/write from
*
* Users may use %ETHTOOL_GDRVINFO or %ETHTOOL_GMODULEINFO to find
* the length of an on-board or module EEPROM, respectively. They
* must allocate the buffer immediately following this structure.
*/
struct ethtool_eeprom {
__u32 cmd;
__u32 magic;
__u32 offset; /* in bytes */
__u32 len; /* in bytes */
__u32 offset;
__u32 len;
__u8 data[0];
};