e89e9cf539
Attached is kernel patch for UDP Fragmentation Offload (UFO) feature. 1. This patch incorporate the review comments by Jeff Garzik. 2. Renamed USO as UFO (UDP Fragmentation Offload) 3. udp sendfile support with UFO This patches uses scatter-gather feature of skb to generate large UDP datagram. Below is a "how-to" on changes required in network device driver to use the UFO interface. UDP Fragmentation Offload (UFO) Interface: ------------------------------------------- UFO is a feature wherein the Linux kernel network stack will offload the IP fragmentation functionality of large UDP datagram to hardware. This will reduce the overhead of stack in fragmenting the large UDP datagram to MTU sized packets 1) Drivers indicate their capability of UFO using dev->features |= NETIF_F_UFO | NETIF_F_HW_CSUM | NETIF_F_SG NETIF_F_HW_CSUM is required for UFO over ipv6. 2) UFO packet will be submitted for transmission using driver xmit routine. UFO packet will have a non-zero value for "skb_shinfo(skb)->ufo_size" skb_shinfo(skb)->ufo_size will indicate the length of data part in each IP fragment going out of the adapter after IP fragmentation by hardware. skb->data will contain MAC/IP/UDP header and skb_shinfo(skb)->frags[] contains the data payload. The skb->ip_summed will be set to CHECKSUM_HW indicating that hardware has to do checksum calculation. Hardware should compute the UDP checksum of complete datagram and also ip header checksum of each fragmented IP packet. For IPV6 the UFO provides the fragment identification-id in skb_shinfo(skb)->ip6_frag_id. The adapter should use this ID for generating IPv6 fragments. Signed-off-by: Ananda Raju <ananda.raju@neterion.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (forwarded) Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
496 lines
17 KiB
C
496 lines
17 KiB
C
/*
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* ethtool.h: Defines for Linux ethtool.
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*
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* Copyright (C) 1998 David S. Miller (davem@redhat.com)
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* Copyright 2001 Jeff Garzik <jgarzik@pobox.com>
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* Portions Copyright 2001 Sun Microsystems (thockin@sun.com)
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* Portions Copyright 2002 Intel (eli.kupermann@intel.com,
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* christopher.leech@intel.com,
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* scott.feldman@intel.com)
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*/
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#ifndef _LINUX_ETHTOOL_H
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#define _LINUX_ETHTOOL_H
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/* This should work for both 32 and 64 bit userland. */
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struct ethtool_cmd {
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u32 cmd;
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u32 supported; /* Features this interface supports */
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u32 advertising; /* Features this interface advertises */
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u16 speed; /* The forced speed, 10Mb, 100Mb, gigabit */
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u8 duplex; /* Duplex, half or full */
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u8 port; /* Which connector port */
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u8 phy_address;
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u8 transceiver; /* Which transceiver to use */
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u8 autoneg; /* Enable or disable autonegotiation */
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u32 maxtxpkt; /* Tx pkts before generating tx int */
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u32 maxrxpkt; /* Rx pkts before generating rx int */
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u32 reserved[4];
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};
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#define ETHTOOL_BUSINFO_LEN 32
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/* these strings are set to whatever the driver author decides... */
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struct ethtool_drvinfo {
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u32 cmd;
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char driver[32]; /* driver short name, "tulip", "eepro100" */
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char version[32]; /* driver version string */
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char fw_version[32]; /* firmware version string, if applicable */
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char bus_info[ETHTOOL_BUSINFO_LEN]; /* Bus info for this IF. */
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/* For PCI devices, use pci_name(pci_dev). */
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char reserved1[32];
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char reserved2[16];
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u32 n_stats; /* number of u64's from ETHTOOL_GSTATS */
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u32 testinfo_len;
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u32 eedump_len; /* Size of data from ETHTOOL_GEEPROM (bytes) */
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u32 regdump_len; /* Size of data from ETHTOOL_GREGS (bytes) */
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};
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#define SOPASS_MAX 6
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/* wake-on-lan settings */
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struct ethtool_wolinfo {
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u32 cmd;
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u32 supported;
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u32 wolopts;
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u8 sopass[SOPASS_MAX]; /* SecureOn(tm) password */
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};
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/* for passing single values */
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struct ethtool_value {
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u32 cmd;
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u32 data;
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};
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/* for passing big chunks of data */
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struct ethtool_regs {
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u32 cmd;
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u32 version; /* driver-specific, indicates different chips/revs */
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u32 len; /* bytes */
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u8 data[0];
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};
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/* for passing EEPROM chunks */
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struct ethtool_eeprom {
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u32 cmd;
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u32 magic;
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u32 offset; /* in bytes */
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u32 len; /* in bytes */
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u8 data[0];
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};
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/* for configuring coalescing parameters of chip */
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struct ethtool_coalesce {
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u32 cmd; /* ETHTOOL_{G,S}COALESCE */
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/* How many usecs to delay an RX interrupt after
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* a packet arrives. If 0, only rx_max_coalesced_frames
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* is used.
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*/
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u32 rx_coalesce_usecs;
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/* How many packets to delay an RX interrupt after
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* a packet arrives. If 0, only rx_coalesce_usecs is
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* used. It is illegal to set both usecs and max frames
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* to zero as this would cause RX interrupts to never be
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* generated.
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*/
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u32 rx_max_coalesced_frames;
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/* Same as above two parameters, except that these values
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* apply while an IRQ is being serviced by the host. Not
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* all cards support this feature and the values are ignored
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* in that case.
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*/
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u32 rx_coalesce_usecs_irq;
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u32 rx_max_coalesced_frames_irq;
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/* How many usecs to delay a TX interrupt after
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* a packet is sent. If 0, only tx_max_coalesced_frames
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* is used.
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*/
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u32 tx_coalesce_usecs;
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/* How many packets to delay a TX interrupt after
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* a packet is sent. If 0, only tx_coalesce_usecs is
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* used. It is illegal to set both usecs and max frames
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* to zero as this would cause TX interrupts to never be
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* generated.
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*/
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u32 tx_max_coalesced_frames;
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/* Same as above two parameters, except that these values
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* apply while an IRQ is being serviced by the host. Not
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* all cards support this feature and the values are ignored
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* in that case.
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*/
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u32 tx_coalesce_usecs_irq;
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u32 tx_max_coalesced_frames_irq;
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/* How many usecs to delay in-memory statistics
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* block updates. Some drivers do not have an in-memory
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* statistic block, and in such cases this value is ignored.
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* This value must not be zero.
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*/
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u32 stats_block_coalesce_usecs;
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/* Adaptive RX/TX coalescing is an algorithm implemented by
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* some drivers to improve latency under low packet rates and
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* improve throughput under high packet rates. Some drivers
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* only implement one of RX or TX adaptive coalescing. Anything
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* not implemented by the driver causes these values to be
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* silently ignored.
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*/
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u32 use_adaptive_rx_coalesce;
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u32 use_adaptive_tx_coalesce;
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/* When the packet rate (measured in packets per second)
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* is below pkt_rate_low, the {rx,tx}_*_low parameters are
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* used.
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*/
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u32 pkt_rate_low;
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u32 rx_coalesce_usecs_low;
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u32 rx_max_coalesced_frames_low;
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u32 tx_coalesce_usecs_low;
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u32 tx_max_coalesced_frames_low;
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/* When the packet rate is below pkt_rate_high but above
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* pkt_rate_low (both measured in packets per second) the
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* normal {rx,tx}_* coalescing parameters are used.
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*/
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/* When the packet rate is (measured in packets per second)
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* is above pkt_rate_high, the {rx,tx}_*_high parameters are
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* used.
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*/
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u32 pkt_rate_high;
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u32 rx_coalesce_usecs_high;
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u32 rx_max_coalesced_frames_high;
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u32 tx_coalesce_usecs_high;
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u32 tx_max_coalesced_frames_high;
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/* How often to do adaptive coalescing packet rate sampling,
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* measured in seconds. Must not be zero.
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*/
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u32 rate_sample_interval;
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};
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/* for configuring RX/TX ring parameters */
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struct ethtool_ringparam {
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u32 cmd; /* ETHTOOL_{G,S}RINGPARAM */
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/* Read only attributes. These indicate the maximum number
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* of pending RX/TX ring entries the driver will allow the
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* user to set.
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*/
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u32 rx_max_pending;
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u32 rx_mini_max_pending;
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u32 rx_jumbo_max_pending;
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u32 tx_max_pending;
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/* Values changeable by the user. The valid values are
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* in the range 1 to the "*_max_pending" counterpart above.
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*/
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u32 rx_pending;
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u32 rx_mini_pending;
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u32 rx_jumbo_pending;
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u32 tx_pending;
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};
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/* for configuring link flow control parameters */
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struct ethtool_pauseparam {
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u32 cmd; /* ETHTOOL_{G,S}PAUSEPARAM */
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/* If the link is being auto-negotiated (via ethtool_cmd.autoneg
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* being true) the user may set 'autonet' here non-zero to have the
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* pause parameters be auto-negotiated too. In such a case, the
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* {rx,tx}_pause values below determine what capabilities are
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* advertised.
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*
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* If 'autoneg' is zero or the link is not being auto-negotiated,
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* then {rx,tx}_pause force the driver to use/not-use pause
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* flow control.
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*/
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u32 autoneg;
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u32 rx_pause;
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u32 tx_pause;
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};
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#define ETH_GSTRING_LEN 32
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enum ethtool_stringset {
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ETH_SS_TEST = 0,
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ETH_SS_STATS,
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};
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/* for passing string sets for data tagging */
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struct ethtool_gstrings {
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u32 cmd; /* ETHTOOL_GSTRINGS */
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u32 string_set; /* string set id e.c. ETH_SS_TEST, etc*/
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u32 len; /* number of strings in the string set */
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u8 data[0];
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};
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enum ethtool_test_flags {
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ETH_TEST_FL_OFFLINE = (1 << 0), /* online / offline */
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ETH_TEST_FL_FAILED = (1 << 1), /* test passed / failed */
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};
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/* for requesting NIC test and getting results*/
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struct ethtool_test {
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u32 cmd; /* ETHTOOL_TEST */
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u32 flags; /* ETH_TEST_FL_xxx */
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u32 reserved;
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u32 len; /* result length, in number of u64 elements */
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u64 data[0];
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};
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/* for dumping NIC-specific statistics */
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struct ethtool_stats {
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u32 cmd; /* ETHTOOL_GSTATS */
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u32 n_stats; /* number of u64's being returned */
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u64 data[0];
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};
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struct ethtool_perm_addr {
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u32 cmd; /* ETHTOOL_GPERMADDR */
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u32 size;
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u8 data[0];
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};
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struct net_device;
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/* Some generic methods drivers may use in their ethtool_ops */
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u32 ethtool_op_get_link(struct net_device *dev);
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u32 ethtool_op_get_tx_csum(struct net_device *dev);
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int ethtool_op_set_tx_csum(struct net_device *dev, u32 data);
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int ethtool_op_set_tx_hw_csum(struct net_device *dev, u32 data);
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u32 ethtool_op_get_sg(struct net_device *dev);
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int ethtool_op_set_sg(struct net_device *dev, u32 data);
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u32 ethtool_op_get_tso(struct net_device *dev);
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int ethtool_op_set_tso(struct net_device *dev, u32 data);
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int ethtool_op_get_perm_addr(struct net_device *dev,
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struct ethtool_perm_addr *addr, u8 *data);
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u32 ethtool_op_get_ufo(struct net_device *dev);
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int ethtool_op_set_ufo(struct net_device *dev, u32 data);
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/**
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* ðtool_ops - Alter and report network device settings
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* get_settings: Get device-specific settings
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* set_settings: Set device-specific settings
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* get_drvinfo: Report driver information
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* get_regs: Get device registers
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* get_wol: Report whether Wake-on-Lan is enabled
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* set_wol: Turn Wake-on-Lan on or off
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* get_msglevel: Report driver message level
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* set_msglevel: Set driver message level
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* nway_reset: Restart autonegotiation
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* get_link: Get link status
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* get_eeprom: Read data from the device EEPROM
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* set_eeprom: Write data to the device EEPROM
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* get_coalesce: Get interrupt coalescing parameters
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* set_coalesce: Set interrupt coalescing parameters
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* get_ringparam: Report ring sizes
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* set_ringparam: Set ring sizes
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* get_pauseparam: Report pause parameters
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* set_pauseparam: Set pause paramters
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* get_rx_csum: Report whether receive checksums are turned on or off
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* set_rx_csum: Turn receive checksum on or off
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* get_tx_csum: Report whether transmit checksums are turned on or off
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* set_tx_csum: Turn transmit checksums on or off
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* get_sg: Report whether scatter-gather is enabled
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* set_sg: Turn scatter-gather on or off
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* get_tso: Report whether TCP segmentation offload is enabled
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* set_tso: Turn TCP segmentation offload on or off
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* get_ufo: Report whether UDP fragmentation offload is enabled
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* set_ufo: Turn UDP fragmentation offload on or off
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* self_test: Run specified self-tests
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* get_strings: Return a set of strings that describe the requested objects
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* phys_id: Identify the device
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* get_stats: Return statistics about the device
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* get_perm_addr: Gets the permanent hardware address
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*
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* Description:
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*
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* get_settings:
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* @get_settings is passed an ðtool_cmd to fill in. It returns
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* an negative errno or zero.
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*
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* set_settings:
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* @set_settings is passed an ðtool_cmd and should attempt to set
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* all the settings this device supports. It may return an error value
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* if something goes wrong (otherwise 0).
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*
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* get_eeprom:
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* Should fill in the magic field. Don't need to check len for zero
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* or wraparound. Fill in the data argument with the eeprom values
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* from offset to offset + len. Update len to the amount read.
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* Returns an error or zero.
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*
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* set_eeprom:
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* Should validate the magic field. Don't need to check len for zero
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* or wraparound. Update len to the amount written. Returns an error
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* or zero.
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*/
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struct ethtool_ops {
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int (*get_settings)(struct net_device *, struct ethtool_cmd *);
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int (*set_settings)(struct net_device *, struct ethtool_cmd *);
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void (*get_drvinfo)(struct net_device *, struct ethtool_drvinfo *);
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int (*get_regs_len)(struct net_device *);
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void (*get_regs)(struct net_device *, struct ethtool_regs *, void *);
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void (*get_wol)(struct net_device *, struct ethtool_wolinfo *);
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int (*set_wol)(struct net_device *, struct ethtool_wolinfo *);
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u32 (*get_msglevel)(struct net_device *);
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void (*set_msglevel)(struct net_device *, u32);
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int (*nway_reset)(struct net_device *);
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u32 (*get_link)(struct net_device *);
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int (*get_eeprom_len)(struct net_device *);
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int (*get_eeprom)(struct net_device *, struct ethtool_eeprom *, u8 *);
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int (*set_eeprom)(struct net_device *, struct ethtool_eeprom *, u8 *);
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int (*get_coalesce)(struct net_device *, struct ethtool_coalesce *);
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int (*set_coalesce)(struct net_device *, struct ethtool_coalesce *);
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void (*get_ringparam)(struct net_device *, struct ethtool_ringparam *);
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int (*set_ringparam)(struct net_device *, struct ethtool_ringparam *);
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void (*get_pauseparam)(struct net_device *, struct ethtool_pauseparam*);
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int (*set_pauseparam)(struct net_device *, struct ethtool_pauseparam*);
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u32 (*get_rx_csum)(struct net_device *);
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int (*set_rx_csum)(struct net_device *, u32);
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u32 (*get_tx_csum)(struct net_device *);
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int (*set_tx_csum)(struct net_device *, u32);
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u32 (*get_sg)(struct net_device *);
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int (*set_sg)(struct net_device *, u32);
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u32 (*get_tso)(struct net_device *);
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int (*set_tso)(struct net_device *, u32);
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int (*self_test_count)(struct net_device *);
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void (*self_test)(struct net_device *, struct ethtool_test *, u64 *);
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void (*get_strings)(struct net_device *, u32 stringset, u8 *);
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int (*phys_id)(struct net_device *, u32);
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int (*get_stats_count)(struct net_device *);
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void (*get_ethtool_stats)(struct net_device *, struct ethtool_stats *, u64 *);
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int (*get_perm_addr)(struct net_device *, struct ethtool_perm_addr *, u8 *);
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int (*begin)(struct net_device *);
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void (*complete)(struct net_device *);
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u32 (*get_ufo)(struct net_device *);
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int (*set_ufo)(struct net_device *, u32);
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};
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/* CMDs currently supported */
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#define ETHTOOL_GSET 0x00000001 /* Get settings. */
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#define ETHTOOL_SSET 0x00000002 /* Set settings. */
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#define ETHTOOL_GDRVINFO 0x00000003 /* Get driver info. */
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#define ETHTOOL_GREGS 0x00000004 /* Get NIC registers. */
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#define ETHTOOL_GWOL 0x00000005 /* Get wake-on-lan options. */
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#define ETHTOOL_SWOL 0x00000006 /* Set wake-on-lan options. */
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#define ETHTOOL_GMSGLVL 0x00000007 /* Get driver message level */
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#define ETHTOOL_SMSGLVL 0x00000008 /* Set driver msg level. */
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#define ETHTOOL_NWAY_RST 0x00000009 /* Restart autonegotiation. */
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#define ETHTOOL_GLINK 0x0000000a /* Get link status (ethtool_value) */
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#define ETHTOOL_GEEPROM 0x0000000b /* Get EEPROM data */
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#define ETHTOOL_SEEPROM 0x0000000c /* Set EEPROM data. */
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#define ETHTOOL_GCOALESCE 0x0000000e /* Get coalesce config */
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#define ETHTOOL_SCOALESCE 0x0000000f /* Set coalesce config. */
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#define ETHTOOL_GRINGPARAM 0x00000010 /* Get ring parameters */
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#define ETHTOOL_SRINGPARAM 0x00000011 /* Set ring parameters. */
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#define ETHTOOL_GPAUSEPARAM 0x00000012 /* Get pause parameters */
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#define ETHTOOL_SPAUSEPARAM 0x00000013 /* Set pause parameters. */
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#define ETHTOOL_GRXCSUM 0x00000014 /* Get RX hw csum enable (ethtool_value) */
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#define ETHTOOL_SRXCSUM 0x00000015 /* Set RX hw csum enable (ethtool_value) */
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#define ETHTOOL_GTXCSUM 0x00000016 /* Get TX hw csum enable (ethtool_value) */
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#define ETHTOOL_STXCSUM 0x00000017 /* Set TX hw csum enable (ethtool_value) */
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#define ETHTOOL_GSG 0x00000018 /* Get scatter-gather enable
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* (ethtool_value) */
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#define ETHTOOL_SSG 0x00000019 /* Set scatter-gather enable
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* (ethtool_value). */
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#define ETHTOOL_TEST 0x0000001a /* execute NIC self-test. */
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#define ETHTOOL_GSTRINGS 0x0000001b /* get specified string set */
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#define ETHTOOL_PHYS_ID 0x0000001c /* identify the NIC */
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#define ETHTOOL_GSTATS 0x0000001d /* get NIC-specific statistics */
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#define ETHTOOL_GTSO 0x0000001e /* Get TSO enable (ethtool_value) */
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#define ETHTOOL_STSO 0x0000001f /* Set TSO enable (ethtool_value) */
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#define ETHTOOL_GPERMADDR 0x00000020 /* Get permanent hardware address */
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#define ETHTOOL_GUFO 0x00000021 /* Get UFO enable (ethtool_value) */
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#define ETHTOOL_SUFO 0x00000022 /* Set UFO enable (ethtool_value) */
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/* compatibility with older code */
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#define SPARC_ETH_GSET ETHTOOL_GSET
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#define SPARC_ETH_SSET ETHTOOL_SSET
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/* Indicates what features are supported by the interface. */
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#define SUPPORTED_10baseT_Half (1 << 0)
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#define SUPPORTED_10baseT_Full (1 << 1)
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#define SUPPORTED_100baseT_Half (1 << 2)
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#define SUPPORTED_100baseT_Full (1 << 3)
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#define SUPPORTED_1000baseT_Half (1 << 4)
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#define SUPPORTED_1000baseT_Full (1 << 5)
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#define SUPPORTED_Autoneg (1 << 6)
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#define SUPPORTED_TP (1 << 7)
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#define SUPPORTED_AUI (1 << 8)
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#define SUPPORTED_MII (1 << 9)
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#define SUPPORTED_FIBRE (1 << 10)
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#define SUPPORTED_BNC (1 << 11)
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#define SUPPORTED_10000baseT_Full (1 << 12)
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#define SUPPORTED_Pause (1 << 13)
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#define SUPPORTED_Asym_Pause (1 << 14)
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/* Indicates what features are advertised by the interface. */
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#define ADVERTISED_10baseT_Half (1 << 0)
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#define ADVERTISED_10baseT_Full (1 << 1)
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#define ADVERTISED_100baseT_Half (1 << 2)
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#define ADVERTISED_100baseT_Full (1 << 3)
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#define ADVERTISED_1000baseT_Half (1 << 4)
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#define ADVERTISED_1000baseT_Full (1 << 5)
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#define ADVERTISED_Autoneg (1 << 6)
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#define ADVERTISED_TP (1 << 7)
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#define ADVERTISED_AUI (1 << 8)
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#define ADVERTISED_MII (1 << 9)
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#define ADVERTISED_FIBRE (1 << 10)
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#define ADVERTISED_BNC (1 << 11)
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#define ADVERTISED_10000baseT_Full (1 << 12)
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#define ADVERTISED_Pause (1 << 13)
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#define ADVERTISED_Asym_Pause (1 << 14)
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/* The following are all involved in forcing a particular link
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* mode for the device for setting things. When getting the
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* devices settings, these indicate the current mode and whether
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* it was foced up into this mode or autonegotiated.
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*/
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/* The forced speed, 10Mb, 100Mb, gigabit, 10GbE. */
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#define SPEED_10 10
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#define SPEED_100 100
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#define SPEED_1000 1000
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#define SPEED_10000 10000
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/* Duplex, half or full. */
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#define DUPLEX_HALF 0x00
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#define DUPLEX_FULL 0x01
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/* Which connector port. */
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#define PORT_TP 0x00
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#define PORT_AUI 0x01
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#define PORT_MII 0x02
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#define PORT_FIBRE 0x03
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#define PORT_BNC 0x04
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/* Which transceiver to use. */
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#define XCVR_INTERNAL 0x00
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#define XCVR_EXTERNAL 0x01
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#define XCVR_DUMMY1 0x02
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#define XCVR_DUMMY2 0x03
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#define XCVR_DUMMY3 0x04
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/* Enable or disable autonegotiation. If this is set to enable,
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* the forced link modes above are completely ignored.
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*/
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#define AUTONEG_DISABLE 0x00
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#define AUTONEG_ENABLE 0x01
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/* Wake-On-Lan options. */
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#define WAKE_PHY (1 << 0)
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#define WAKE_UCAST (1 << 1)
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#define WAKE_MCAST (1 << 2)
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#define WAKE_BCAST (1 << 3)
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#define WAKE_ARP (1 << 4)
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#define WAKE_MAGIC (1 << 5)
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#define WAKE_MAGICSECURE (1 << 6) /* only meaningful if WAKE_MAGIC */
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#endif /* _LINUX_ETHTOOL_H */
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