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Commit 5f308d19 authored by Ben Hutchings's avatar Ben Hutchings Committed by David S. Miller
Browse files

ethtool: Reformat struct ethtool_coalesce comments into kernel-doc format 



This reorders and duplicates some wording, but should make no
substantive changes.

Signed-off-by: default avatarBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 19e2f6fe

include/linux/ethtool.h

+64 −71
Original line number Diff line number Diff line
@@ -117,99 +117,92 @@ struct ethtool_eeprom { 
	__u8	data[0];

};



/* for configuring coalescing parameters of chip */

struct ethtool_coalesce {

	__u32	cmd;	/* ETHTOOL_{G,S}COALESCE */



	/* How many usecs to delay an RX interrupt after

	 * a packet arrives.  If 0, only rx_max_coalesced_frames

/**

 * struct ethtool_coalesce - coalescing parameters of chip

 * @cmd: ETHTOOL_{G,S}COALESCE

 * @rx_coalesce_usecs: How many usecs to delay an RX interrupt after

 *	a packet arrives.  If 0, only @rx_max_coalesced_frames is used.

 * @rx_max_coalesced_frames: How many packets to delay an RX interrupt

 *	after a packet arrives.  If 0, only @rx_coalesce_usecs is used.

 * @rx_coalesce_usecs_irq: Same as @rx_coalesce_usecs, except that

 *	this value applies while an IRQ is being serviced by the host.

 * @rx_max_coalesced_frames_irq: Same as @rx_max_coalesced_frames,

 *	except that this value applies while an IRQ is being serviced

 *	by the host.

 * @tx_coalesce_usecs: How many usecs to delay a TX interrupt after

 *	a packet is sent.  If 0, only @tx_max_coalesced_frames

 *	is used.

 * @tx_max_coalesced_frames: How many packets to delay a TX interrupt

 *	after a packet is sent.  If 0, only @tx_coalesce_usecs is

 *	used.

 * @tx_coalesce_usecs_irq: Same as @tx_coalesce_usecs, except that

 *	this value applies while an IRQ is being serviced by the host.

 * @tx_max_coalesced_frames_irq: Same as @tx_max_coalesced_frames,

 *	except that this value applies while an IRQ is being serviced

 *	by the host.

 * @stats_block_coalesce_usecs: How many usecs to delay in-memory

 *	statistics block updates.  Some drivers do not have an

 *	in-memory statistic block, and in such cases this value is

 *	ignored.  This value must not be zero.

 * @use_adaptive_rx_coalesce: Enable adaptive RX coalescing.

 * @use_adaptive_tx_coalesce: Enable adaptive TX coalescing.

 * @pkt_rate_low: Threshold for low packet rate (packets per second).

 * @rx_coalesce_usecs_low: How many usecs to delay an RX interrupt after

 *	a packet arrives, when the packet rate is below @pkt_rate_low.

 * @rx_max_coalesced_frames_low: How many packets to delay an RX interrupt

 *	after a packet arrives, when the packet rate is below @pkt_rate_low.

 * @tx_coalesce_usecs_low: How many usecs to delay a TX interrupt after

 *	a packet is sent, when the packet rate is below @pkt_rate_low.

 * @tx_max_coalesced_frames_low: How many packets to delay a TX interrupt

 *	after a packet is sent, when the packet rate is below @pkt_rate_low.

 * @pkt_rate_high: Threshold for high packet rate (packets per second).

 * @rx_coalesce_usecs_high: How many usecs to delay an RX interrupt after

 *	a packet arrives, when the packet rate is above @pkt_rate_high.

 * @rx_max_coalesced_frames_high: How many packets to delay an RX interrupt

 *	after a packet arrives, when the packet rate is above @pkt_rate_high.

 * @tx_coalesce_usecs_high: How many usecs to delay a TX interrupt after

 *	a packet is sent, when the packet rate is above @pkt_rate_high.

 * @tx_max_coalesced_frames_high: How many packets to delay a TX interrupt

 *	after a packet is sent, when the packet rate is above @pkt_rate_high.

 * @rate_sample_interval: How often to do adaptive coalescing packet rate

 *	sampling, measured in seconds.  Must not be zero.

 *

 * It is illegal to set both usecs and max frames to zero as this

 * would cause interrupts to never be generated.

 *

 * Adaptive RX/TX coalescing is an algorithm implemented by some

 * drivers to improve latency under low packet rates and improve

 * throughput under high packet rates.  Some drivers only implement

 * one of RX or TX adaptive coalescing.  Anything not implemented by

 * the driver causes these values to be silently ignored.

 *

 * When the packet rate is below @pkt_rate_high but above

 * @pkt_rate_low (both measured in packets per second) the

 * normal {rx,tx}_* coalescing parameters are used.

 */

struct ethtool_coalesce {

	__u32	cmd;

	__u32	rx_coalesce_usecs;



	/* How many packets to delay an RX interrupt after

	 * a packet arrives.  If 0, only rx_coalesce_usecs is

	 * used.  It is illegal to set both usecs and max frames

	 * to zero as this would cause RX interrupts to never be

	 * generated.

	 */

	__u32	rx_max_coalesced_frames;



	/* Same as above two parameters, except that these values

	 * apply while an IRQ is being serviced by the host.  Not

	 * all cards support this feature and the values are ignored

	 * in that case.

	 */

	__u32	rx_coalesce_usecs_irq;

	__u32	rx_max_coalesced_frames_irq;



	/* How many usecs to delay a TX interrupt after

	 * a packet is sent.  If 0, only tx_max_coalesced_frames

	 * is used.

	 */

	__u32	tx_coalesce_usecs;



	/* How many packets to delay a TX interrupt after

	 * a packet is sent.  If 0, only tx_coalesce_usecs is

	 * used.  It is illegal to set both usecs and max frames

	 * to zero as this would cause TX interrupts to never be

	 * generated.

	 */

	__u32	tx_max_coalesced_frames;



	/* Same as above two parameters, except that these values

	 * apply while an IRQ is being serviced by the host.  Not

	 * all cards support this feature and the values are ignored

	 * in that case.

	 */

	__u32	tx_coalesce_usecs_irq;

	__u32	tx_max_coalesced_frames_irq;



	/* How many usecs to delay in-memory statistics

	 * block updates.  Some drivers do not have an in-memory

	 * statistic block, and in such cases this value is ignored.

	 * This value must not be zero.

	 */

	__u32	stats_block_coalesce_usecs;



	/* Adaptive RX/TX coalescing is an algorithm implemented by

	 * some drivers to improve latency under low packet rates and

	 * improve throughput under high packet rates.  Some drivers

	 * only implement one of RX or TX adaptive coalescing.  Anything

	 * not implemented by the driver causes these values to be

	 * silently ignored.

	 */

	__u32	use_adaptive_rx_coalesce;

	__u32	use_adaptive_tx_coalesce;



	/* When the packet rate (measured in packets per second)

	 * is below pkt_rate_low, the {rx,tx}_*_low parameters are

	 * used.

	 */

	__u32	pkt_rate_low;

	__u32	rx_coalesce_usecs_low;

	__u32	rx_max_coalesced_frames_low;

	__u32	tx_coalesce_usecs_low;

	__u32	tx_max_coalesced_frames_low;



	/* When the packet rate is below pkt_rate_high but above

	 * pkt_rate_low (both measured in packets per second) the

	 * normal {rx,tx}_* coalescing parameters are used.

	 */



	/* When the packet rate is (measured in packets per second)

	 * is above pkt_rate_high, the {rx,tx}_*_high parameters are

	 * used.

	 */

	__u32	pkt_rate_high;

	__u32	rx_coalesce_usecs_high;

	__u32	rx_max_coalesced_frames_high;

	__u32	tx_coalesce_usecs_high;

	__u32	tx_max_coalesced_frames_high;



	/* How often to do adaptive coalescing packet rate sampling,

	 * measured in seconds.  Must not be zero.

	 */

	__u32	rate_sample_interval;

};