1a5f3da20b
Forward Error Correction (FEC) modes i.e Base-R
and Reed-Solomon modes are introduced in 25G/40G/100G standards
for providing good BER at high speeds. Various networking devices
which support 25G/40G/100G provides ability to manage supported FEC
modes and the lack of FEC encoding control and reporting today is a
source for interoperability issues for many vendors.
FEC capability as well as specific FEC mode i.e. Base-R
or RS modes can be requested or advertised through bits D44:47 of
base link codeword.
This patch set intends to provide option under ethtool to manage
and report FEC encoding settings for networking devices as per
IEEE 802.3 bj, bm and by specs.
set-fec/show-fec option(s) are designed to provide control and
report the FEC encoding on the link.
SET FEC option:
root@tor: ethtool --set-fec swp1 encoding [off | RS | BaseR | auto]
Encoding: Types of encoding
Off : Turning off any encoding
RS : enforcing RS-FEC encoding on supported speeds
BaseR : enforcing Base R encoding on supported speeds
Auto : IEEE defaults for the speed/medium combination
Here are a few examples of what we would expect if encoding=auto:
- if autoneg is on, we are expecting FEC to be negotiated as on or off
as long as protocol supports it
- if the hardware is capable of detecting the FEC encoding on it's
receiver it will reconfigure its encoder to match
- in absence of the above, the configuration would be set to IEEE
defaults.
>From our understanding , this is essentially what most hardware/driver
combinations are doing today in the absence of a way for users to
control the behavior.
SHOW FEC option:
root@tor: ethtool --show-fec swp1
FEC parameters for swp1:
Active FEC encodings: RS
Configured FEC encodings: RS | BaseR
ETHTOOL DEVNAME output modification:
ethtool devname output:
root@tor:~# ethtool swp1
Settings for swp1:
root@hpe-7712-03:~# ethtool swp18
Settings for swp18:
Supported ports: [ FIBRE ]
Supported link modes: 40000baseCR4/Full
40000baseSR4/Full
40000baseLR4/Full
100000baseSR4/Full
100000baseCR4/Full
100000baseLR4_ER4/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Supported FEC modes: [RS | BaseR | None | Not reported]
Advertised link modes: Not reported
Advertised pause frame use: No
Advertised auto-negotiation: No
Advertised FEC modes: [RS | BaseR | None | Not reported]
<<<< One or more FEC modes
Speed: 100000Mb/s
Duplex: Full
Port: FIBRE
PHYAD: 106
Transceiver: internal
Auto-negotiation: off
Link detected: yes
This patch includes following changes
a) New ETHTOOL_SFECPARAM/SFECPARAM API, handled by
the new get_fecparam/set_fecparam callbacks, provides support
for configuration of forward error correction modes.
b) Link mode bits for FEC modes i.e. None (No FEC mode), RS, BaseR/FC
are defined so that users can configure these fec modes for supported
and advertising fields as part of link autonegotiation.
Signed-off-by: Vidya Sagar Ravipati <vidya.chowdary@gmail.com>
Signed-off-by: Dustin Byford <dustin@cumulusnetworks.com>
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
383 lines
16 KiB
C
383 lines
16 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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* Portions Copyright (C) Sun Microsystems 2008
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*/
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#ifndef _LINUX_ETHTOOL_H
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#define _LINUX_ETHTOOL_H
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#include <linux/bitmap.h>
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#include <linux/compat.h>
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#include <uapi/linux/ethtool.h>
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#ifdef CONFIG_COMPAT
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struct compat_ethtool_rx_flow_spec {
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u32 flow_type;
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union ethtool_flow_union h_u;
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struct ethtool_flow_ext h_ext;
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union ethtool_flow_union m_u;
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struct ethtool_flow_ext m_ext;
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compat_u64 ring_cookie;
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u32 location;
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};
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struct compat_ethtool_rxnfc {
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u32 cmd;
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u32 flow_type;
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compat_u64 data;
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struct compat_ethtool_rx_flow_spec fs;
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u32 rule_cnt;
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u32 rule_locs[0];
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};
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#endif /* CONFIG_COMPAT */
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#include <linux/rculist.h>
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/**
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* enum ethtool_phys_id_state - indicator state for physical identification
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* @ETHTOOL_ID_INACTIVE: Physical ID indicator should be deactivated
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* @ETHTOOL_ID_ACTIVE: Physical ID indicator should be activated
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* @ETHTOOL_ID_ON: LED should be turned on (used iff %ETHTOOL_ID_ACTIVE
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* is not supported)
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* @ETHTOOL_ID_OFF: LED should be turned off (used iff %ETHTOOL_ID_ACTIVE
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* is not supported)
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*/
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enum ethtool_phys_id_state {
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ETHTOOL_ID_INACTIVE,
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ETHTOOL_ID_ACTIVE,
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ETHTOOL_ID_ON,
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ETHTOOL_ID_OFF
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};
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enum {
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ETH_RSS_HASH_TOP_BIT, /* Configurable RSS hash function - Toeplitz */
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ETH_RSS_HASH_XOR_BIT, /* Configurable RSS hash function - Xor */
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ETH_RSS_HASH_CRC32_BIT, /* Configurable RSS hash function - Crc32 */
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/*
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* Add your fresh new hash function bits above and remember to update
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* rss_hash_func_strings[] in ethtool.c
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*/
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ETH_RSS_HASH_FUNCS_COUNT
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};
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#define __ETH_RSS_HASH_BIT(bit) ((u32)1 << (bit))
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#define __ETH_RSS_HASH(name) __ETH_RSS_HASH_BIT(ETH_RSS_HASH_##name##_BIT)
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#define ETH_RSS_HASH_TOP __ETH_RSS_HASH(TOP)
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#define ETH_RSS_HASH_XOR __ETH_RSS_HASH(XOR)
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#define ETH_RSS_HASH_CRC32 __ETH_RSS_HASH(CRC32)
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#define ETH_RSS_HASH_UNKNOWN 0
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#define ETH_RSS_HASH_NO_CHANGE 0
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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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int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *eti);
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/**
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* ethtool_rxfh_indir_default - get default value for RX flow hash indirection
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* @index: Index in RX flow hash indirection table
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* @n_rx_rings: Number of RX rings to use
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*
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* This function provides the default policy for RX flow hash indirection.
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*/
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static inline u32 ethtool_rxfh_indir_default(u32 index, u32 n_rx_rings)
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{
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return index % n_rx_rings;
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}
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/* number of link mode bits/ulongs handled internally by kernel */
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#define __ETHTOOL_LINK_MODE_MASK_NBITS \
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(__ETHTOOL_LINK_MODE_LAST + 1)
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/* declare a link mode bitmap */
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#define __ETHTOOL_DECLARE_LINK_MODE_MASK(name) \
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DECLARE_BITMAP(name, __ETHTOOL_LINK_MODE_MASK_NBITS)
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/* drivers must ignore base.cmd and base.link_mode_masks_nwords
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* fields, but they are allowed to overwrite them (will be ignored).
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*/
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struct ethtool_link_ksettings {
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struct ethtool_link_settings base;
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struct {
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__ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
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__ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
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__ETHTOOL_DECLARE_LINK_MODE_MASK(lp_advertising);
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} link_modes;
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};
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/**
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* ethtool_link_ksettings_zero_link_mode - clear link_ksettings link mode mask
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* @ptr : pointer to struct ethtool_link_ksettings
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* @name : one of supported/advertising/lp_advertising
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*/
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#define ethtool_link_ksettings_zero_link_mode(ptr, name) \
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bitmap_zero((ptr)->link_modes.name, __ETHTOOL_LINK_MODE_MASK_NBITS)
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/**
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* ethtool_link_ksettings_add_link_mode - set bit in link_ksettings
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* link mode mask
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* @ptr : pointer to struct ethtool_link_ksettings
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* @name : one of supported/advertising/lp_advertising
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* @mode : one of the ETHTOOL_LINK_MODE_*_BIT
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* (not atomic, no bound checking)
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*/
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#define ethtool_link_ksettings_add_link_mode(ptr, name, mode) \
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__set_bit(ETHTOOL_LINK_MODE_ ## mode ## _BIT, (ptr)->link_modes.name)
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/**
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* ethtool_link_ksettings_test_link_mode - test bit in ksettings link mode mask
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* @ptr : pointer to struct ethtool_link_ksettings
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* @name : one of supported/advertising/lp_advertising
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* @mode : one of the ETHTOOL_LINK_MODE_*_BIT
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* (not atomic, no bound checking)
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*
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* Returns true/false.
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*/
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#define ethtool_link_ksettings_test_link_mode(ptr, name, mode) \
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test_bit(ETHTOOL_LINK_MODE_ ## mode ## _BIT, (ptr)->link_modes.name)
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extern int
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__ethtool_get_link_ksettings(struct net_device *dev,
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struct ethtool_link_ksettings *link_ksettings);
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void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
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u32 legacy_u32);
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/* return false if src had higher bits set. lower bits always updated. */
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bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
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const unsigned long *src);
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/**
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* struct ethtool_ops - optional netdev operations
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* @get_settings: DEPRECATED, use %get_link_ksettings/%set_link_ksettings
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* API. Get various device settings including Ethernet link
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* settings. The @cmd parameter is expected to have been cleared
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* before get_settings is called. Returns a negative error code
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* or zero.
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* @set_settings: DEPRECATED, use %get_link_ksettings/%set_link_ksettings
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* API. Set various device settings including Ethernet link
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* settings. Returns a negative error code or zero.
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* @get_drvinfo: Report driver/device information. Should only set the
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* @driver, @version, @fw_version and @bus_info fields. If not
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* implemented, the @driver and @bus_info fields will be filled in
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* according to the netdev's parent device.
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* @get_regs_len: Get buffer length required for @get_regs
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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. Returns a negative error code
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* or zero.
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* @get_msglevel: Report driver message level. This should be the value
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* of the @msg_enable field used by netif logging functions.
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* @set_msglevel: Set driver message level
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* @nway_reset: Restart autonegotiation. Returns a negative error code
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* or zero.
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* @get_link: Report whether physical link is up. Will only be called if
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* the netdev is up. Should usually be set to ethtool_op_get_link(),
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* which uses netif_carrier_ok().
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* @get_eeprom: Read data from the device 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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* @set_eeprom: Write data to the device 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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* @get_coalesce: Get interrupt coalescing parameters. Returns a negative
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* error code or zero.
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* @set_coalesce: Set interrupt coalescing parameters. Returns a negative
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* error code or zero.
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* @get_ringparam: Report ring sizes
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* @set_ringparam: Set ring sizes. Returns a negative error code or zero.
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* @get_pauseparam: Report pause parameters
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* @set_pauseparam: Set pause parameters. Returns a negative error code
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* or zero.
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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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* @set_phys_id: Identify the physical devices, e.g. by flashing an LED
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* attached to it. The implementation may update the indicator
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* asynchronously or synchronously, but in either case it must return
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* quickly. It is initially called with the argument %ETHTOOL_ID_ACTIVE,
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* and must either activate asynchronous updates and return zero, return
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* a negative error or return a positive frequency for synchronous
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* indication (e.g. 1 for one on/off cycle per second). If it returns
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* a frequency then it will be called again at intervals with the
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* argument %ETHTOOL_ID_ON or %ETHTOOL_ID_OFF and should set the state of
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* the indicator accordingly. Finally, it is called with the argument
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* %ETHTOOL_ID_INACTIVE and must deactivate the indicator. Returns a
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* negative error code or zero.
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* @get_ethtool_stats: Return extended statistics about the device.
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* This is only useful if the device maintains statistics not
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* included in &struct rtnl_link_stats64.
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* @begin: Function to be called before any other operation. Returns a
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* negative error code or zero.
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* @complete: Function to be called after any other operation except
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* @begin. Will be called even if the other operation failed.
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* @get_priv_flags: Report driver-specific feature flags.
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* @set_priv_flags: Set driver-specific feature flags. Returns a negative
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* error code or zero.
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* @get_sset_count: Get number of strings that @get_strings will write.
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* @get_rxnfc: Get RX flow classification rules. Returns a negative
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* error code or zero.
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* @set_rxnfc: Set RX flow classification rules. Returns a negative
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* error code or zero.
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* @flash_device: Write a firmware image to device's flash memory.
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* Returns a negative error code or zero.
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* @reset: Reset (part of) the device, as specified by a bitmask of
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* flags from &enum ethtool_reset_flags. Returns a negative
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* error code or zero.
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* @get_rxfh_key_size: Get the size of the RX flow hash key.
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* Returns zero if not supported for this specific device.
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* @get_rxfh_indir_size: Get the size of the RX flow hash indirection table.
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* Returns zero if not supported for this specific device.
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* @get_rxfh: Get the contents of the RX flow hash indirection table, hash key
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* and/or hash function.
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* Returns a negative error code or zero.
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* @set_rxfh: Set the contents of the RX flow hash indirection table, hash
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* key, and/or hash function. Arguments which are set to %NULL or zero
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* will remain unchanged.
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* Returns a negative error code or zero. An error code must be returned
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* if at least one unsupported change was requested.
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* @get_channels: Get number of channels.
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* @set_channels: Set number of channels. Returns a negative error code or
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* zero.
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* @get_dump_flag: Get dump flag indicating current dump length, version,
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* and flag of the device.
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* @get_dump_data: Get dump data.
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* @set_dump: Set dump specific flags to the device.
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* @get_ts_info: Get the time stamping and PTP hardware clock capabilities.
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* Drivers supporting transmit time stamps in software should set this to
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* ethtool_op_get_ts_info().
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* @get_module_info: Get the size and type of the eeprom contained within
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* a plug-in module.
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* @get_module_eeprom: Get the eeprom information from the plug-in module
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* @get_eee: Get Energy-Efficient (EEE) supported and status.
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* @set_eee: Set EEE status (enable/disable) as well as LPI timers.
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* @get_per_queue_coalesce: Get interrupt coalescing parameters per queue.
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* It must check that the given queue number is valid. If neither a RX nor
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* a TX queue has this number, return -EINVAL. If only a RX queue or a TX
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* queue has this number, set the inapplicable fields to ~0 and return 0.
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* Returns a negative error code or zero.
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* @set_per_queue_coalesce: Set interrupt coalescing parameters per queue.
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* It must check that the given queue number is valid. If neither a RX nor
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* a TX queue has this number, return -EINVAL. If only a RX queue or a TX
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* queue has this number, ignore the inapplicable fields.
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* Returns a negative error code or zero.
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* @get_link_ksettings: When defined, takes precedence over the
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* %get_settings method. Get various device settings
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* including Ethernet link settings. The %cmd and
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* %link_mode_masks_nwords fields should be ignored (use
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* %__ETHTOOL_LINK_MODE_MASK_NBITS instead of the latter), any
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* change to them will be overwritten by kernel. Returns a
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* negative error code or zero.
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* @set_link_ksettings: When defined, takes precedence over the
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* %set_settings method. Set various device settings including
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* Ethernet link settings. The %cmd and %link_mode_masks_nwords
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* fields should be ignored (use %__ETHTOOL_LINK_MODE_MASK_NBITS
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* instead of the latter), any change to them will be overwritten
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* by kernel. Returns a negative error code or zero.
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*
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* All operations are optional (i.e. the function pointer may be set
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* to %NULL) and callers must take this into account. Callers must
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* hold the RTNL lock.
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*
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* See the structures used by these operations for further documentation.
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* Note that for all operations using a structure ending with a zero-
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* length array, the array is allocated separately in the kernel and
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* is passed to the driver as an additional parameter.
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*
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* See &struct net_device and &struct net_device_ops for documentation
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* of the generic netdev features interface.
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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 *,
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struct ethtool_eeprom *, u8 *);
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int (*set_eeprom)(struct net_device *,
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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 *,
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struct ethtool_ringparam *);
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int (*set_ringparam)(struct net_device *,
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struct ethtool_ringparam *);
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void (*get_pauseparam)(struct net_device *,
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struct ethtool_pauseparam*);
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int (*set_pauseparam)(struct net_device *,
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struct ethtool_pauseparam*);
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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 (*set_phys_id)(struct net_device *, enum ethtool_phys_id_state);
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void (*get_ethtool_stats)(struct net_device *,
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struct ethtool_stats *, u64 *);
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int (*begin)(struct net_device *);
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void (*complete)(struct net_device *);
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u32 (*get_priv_flags)(struct net_device *);
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int (*set_priv_flags)(struct net_device *, u32);
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int (*get_sset_count)(struct net_device *, int);
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int (*get_rxnfc)(struct net_device *,
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struct ethtool_rxnfc *, u32 *rule_locs);
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int (*set_rxnfc)(struct net_device *, struct ethtool_rxnfc *);
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int (*flash_device)(struct net_device *, struct ethtool_flash *);
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int (*reset)(struct net_device *, u32 *);
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u32 (*get_rxfh_key_size)(struct net_device *);
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u32 (*get_rxfh_indir_size)(struct net_device *);
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int (*get_rxfh)(struct net_device *, u32 *indir, u8 *key,
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u8 *hfunc);
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int (*set_rxfh)(struct net_device *, const u32 *indir,
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const u8 *key, const u8 hfunc);
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void (*get_channels)(struct net_device *, struct ethtool_channels *);
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int (*set_channels)(struct net_device *, struct ethtool_channels *);
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int (*get_dump_flag)(struct net_device *, struct ethtool_dump *);
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int (*get_dump_data)(struct net_device *,
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struct ethtool_dump *, void *);
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int (*set_dump)(struct net_device *, struct ethtool_dump *);
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int (*get_ts_info)(struct net_device *, struct ethtool_ts_info *);
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int (*get_module_info)(struct net_device *,
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struct ethtool_modinfo *);
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int (*get_module_eeprom)(struct net_device *,
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struct ethtool_eeprom *, u8 *);
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int (*get_eee)(struct net_device *, struct ethtool_eee *);
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int (*set_eee)(struct net_device *, struct ethtool_eee *);
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int (*get_tunable)(struct net_device *,
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const struct ethtool_tunable *, void *);
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int (*set_tunable)(struct net_device *,
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const struct ethtool_tunable *, const void *);
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int (*get_per_queue_coalesce)(struct net_device *, u32,
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struct ethtool_coalesce *);
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int (*set_per_queue_coalesce)(struct net_device *, u32,
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struct ethtool_coalesce *);
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int (*get_link_ksettings)(struct net_device *,
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struct ethtool_link_ksettings *);
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int (*set_link_ksettings)(struct net_device *,
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const struct ethtool_link_ksettings *);
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int (*get_fecparam)(struct net_device *,
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struct ethtool_fecparam *);
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int (*set_fecparam)(struct net_device *,
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struct ethtool_fecparam *);
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};
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#endif /* _LINUX_ETHTOOL_H */
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