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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
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+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;
};