On 2/1/2018 8:32 AM, Aishwarya Pant wrote:
> Add documentation for core and hardware specific infiniband interfaces.
> The descriptions have been collected from git commit logs, reading
> through code and data sheets. Some drivers have incomplete doc and are
> annotated with the comment '[to be documented]'.
> 
> Signed-off-by: Aishwarya Pant <[email protected]>
> ---
>  Documentation/ABI/testing/sysfs-class-infiniband | 755 
> +++++++++++++++++++++++
>  1 file changed, 755 insertions(+)
> 
> diff --git a/Documentation/ABI/testing/sysfs-class-infiniband 
> b/Documentation/ABI/testing/sysfs-class-infiniband
> index a86abe66a316..2e150169633b 100644
> --- a/Documentation/ABI/testing/sysfs-class-infiniband
> +++ b/Documentation/ABI/testing/sysfs-class-infiniband
> @@ -1,3 +1,194 @@
> +sysfs interface common for all infiniband devices
> +-------------------------------------------------
> +
> +What:                /sys/class/infiniband/<device>/node_type
> +What:                /sys/class/infiniband/<device>/node_guid
> +What:                /sys/class/infiniband/<device>/sys_image_guid
> +Date:                Apr, 2005
> +KernelVersion:       v2.6.12
> +Contact:     [email protected]
> +Description:
> +             node_type:      (RO) Node type (CA, RNIC, usNIC, usNIC UDP,
> +                             switch or router)
> +
> +             node_guid:      (RO) Node GUID
> +
> +             sys_image_guid: (RO) System image GUID
> +
> +
> +What:                /sys/class/infiniband/<device>/node_desc
> +Date:                Feb, 2006
> +KernelVersion:       v2.6.17
> +Contact:     [email protected]
> +Description:
> +             (RW) Update the node description with information such as the
> +             node's hostname, so that IB network management software can tie
> +             its view to the real world.
> +
> +
> +What:                /sys/class/infiniband/<device>/fw_ver
> +Date:                Jun, 2016
> +KernelVersion:       v4.10
> +Contact:     [email protected]
> +Description:
> +             (RO) Display firmware version
> +
> +
> +What:                /sys/class/infiniband/<device>/ports/<port-num>/lid
> +What:                /sys/class/infiniband/<device>/ports/<port-num>/rate
> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/lid_mask_count
> +What:                /sys/class/infiniband/<device>/ports/<port-num>/sm_sl
> +What:                /sys/class/infiniband/<device>/ports/<port-num>/sm_lid
> +What:                /sys/class/infiniband/<device>/ports/<port-num>/state
> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/phys_state
> +What:                /sys/class/infiniband/<device>/ports/<port-num>/cap_mask
> +Date:                Apr, 2005
> +KernelVersion:       v2.6.12
> +Contact:     [email protected]
> +Description:
> +
> +             lid:            (RO) Port LID
> +
> +             rate:           (RO) Port data rate (active width * active
> +                             speed)
> +
> +             lid_mask_count: (RO) Port LID mask count
> +
> +             sm_slL          (RO) Subnet manager SL for port's subnet

Typo sm_sl:

> +
> +             sm_lid:         (RO) Subnet manager LID for port's subnet
> +
> +             state:          (RO) Port state (DOWN, INIT, ARMED, ACTIVE or
> +                             ACTIVE_DEFER> +
> +             phys_state:     (RO) Port physical state (Sleep, Polling,
> +                             LinkUp, etc)
> +
> +             cap_mask:       (RO) Port capability mask

2 bits here are settable: IsCommunicationManagementSupported and IsSM.

> +
> +
> +What:                
> /sys/class/inifiniband/<device>/ports/<port-num>/link_layer

Typo: infiniband

> +Date:                Oct, 2010
> +KernelVersion:       v2.6.37
> +Contact:     [email protected]
> +Description:
> +             (RO) Link layer type information (Infiniband or Ethernet type)
> +
> +
> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/counters/symbol_error
> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/counters/port_rcv_errors
> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/counters/port_rcv_remote_physical_errors
> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/counters/port_rcv_switch_relay_errors
> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/counters/link_error_recovery
> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/counters/port_xmit_constraint_errors
> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/counters/port_rcv_contraint_errors
> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/counters/local_link_integrity_errors
> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/counters/ecessive_buffer_overrun_errors

typo: excessive_buffer_overrun_errors

> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/counters/port_xmit_data
> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/counters/port_rcv_data
> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/counters/port_xmit_packets
> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/counters/port_rcv_packets
> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/counters/unicast_rcv_packets
> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/counters/unicast_xmit_packets
> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/counters/multicast_rcv_packets
> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/counters/multicast_xmit_packets
> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/counters/link_downed
> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/counters/port_xmit_discards
> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/counters/VL15_dropped
> +What:                
> /sys/class/infiniband/<device>/ports/<port-num>/counters/port_xmit_wait
> +Date:                Apr, 2005
> +KernelVersion:       v2.6.12
> +Contact:     [email protected]
> +Description:
> +             Errors info:
> +             -----------
> +
> +             symbol_error: (RO) Total number of minor link errors detected on
> +             one or more physical lanes.
> +
> +             port_rcv_error : (RO) Total number of packets containing an
> +             error that were received on the port.

typo: port_rcv_errors

> +
> +             port_rcv_remote_physical_errors : (RO) Total number of packets
> +             marked with the EBP delimiter received on the port.
> +
> +             port_rcv_switch_relay_errors : (RO) Total number of packets
> +             received on the port that were discarded because they could not
> +             be forwarded by the switch relay.
> +
> +             link_error_recovery: (RO) Total number of times the Port
> +             Training state machine has successfully completed the link error
> +             recovery process.
> +
> +             port_xmit_constraint_errors: (RO) Total number of packets not
> +             transmitted from the switch physical port.

due to outbound raw filtering or failing outbound partition or IP
version check.

> +
> +             port_rcv_constraint_errors: (RO) Total number of packets
> +             received on the switch physical port that are discarded.

due to inbound raw filtering or failing outbound partition or IP version
check.

> +
> +             local_link_integrity_errors: (RO) The number of times that the
> +             count of local physical errors exceeded the threshold specified
> +             by LocalPhyErrors
> +
> +             excessive_buffer_overrun_errors: (RO) This counter, indicates an
> +             input buffer overrun. It indicates possible misconfiguration of
> +             a port, either by the Subnet Manager (SM) or by user
> +             intervention. It can also indicate hardware issues or extremely
> +             poor link signal integrity
> +
> +             Data info:
> +             ---------
> +
> +             port_xmit_data: (RO) Total number of data octets, divided by 4
> +             (lanes), transmitted on all VLs. This is 64 bit counter
> +
> +             port_rcv_data: (RO) Total number of data octets, divided by 4
> +             (lanes), received on all VLs. This is 64 bit counter.
> +
> +             port_xmit_packets: (RO) Total number of packets transmitted on
> +             all VLs from this port. This may include packets with errors.
> +             This is 64 bit counter.
> +
> +             port_rcv_packets: (RO) Total number of packets (this may include
> +             packets containing Errors. This is 64 bit counter.
> +
> +             link_downed: (RO) Total number of times the Port Training state
> +             machine has failed the link error recovery process and downed
> +             the link.
> +
> +             unicast_rcv_packets: (RO) Total number of unicast packets,
> +             including unicast packets containing errors.
> +
> +             unicast_xmit_packets: (RO) Total number of unicast packets
> +             transmitted on all VLs from the port. This may include unicast
> +             packets with errors.
> +
> +             multicast_rcv_packets: (RO) Total number of multicast packets,
> +             including multicast packets containing errors.
> +
> +             multicast_xmit_packets: (RO) Total number of multicast packets
> +             transmitted on all VLs from the port. This may include multicast
> +             packets with errors.
> +
> +             Misc info:
> +             ---------
> +
> +             port_xmit_discards: (RO) Total number of outbound packets
> +             discarded by the port because the port is down or congested.
> +
> +             VL15_dropped: (RO) Number of incoming VL15 packets dropped due
> +             to resource limitations (e.g., lack of buffers) of the port.
> +
> +             port_xmit_wait: (RO) The number of ticks during which the port
> +             had data to transmit but no data was sent during the entire tick
> +             (either because of insufficient credits or because of lack of
> +             arbitration).
> +
> +             Each of these files contains the corresponding value from the
> +             port's Performance Management PortCounters attribute, as
> +             described in the InfiniBand Architecture Specification.
> +
> +
>  What:                
> /sys/class/infiniband/<hca>/ports/<port-number>/gid_attrs/ndevs/<gid-index>
>  Date:                November 29, 2015
>  KernelVersion:       4.4.0
> @@ -14,3 +205,567 @@ Description:     The RoCE type of the associated GID 
> resides at index <gid-index>.
>               or "RoCE v2" for RoCE v2 based GIDs.
>  
>  
> +What:                /sys/class/infiniband_mad/umadN/ibdev
> +What:                /sys/class/infiniband_mad/umadN/port
> +What:                /sys/class/infiniband_mad/issmN/ibdev
> +What:                /sys/class/infiniband_mad/issmN/port
> +Date:                Apr, 2005
> +KernelVersion:       v2.6.12
> +Contact:     [email protected]
> +Description:
> +             Each port of each InfiniBand device has a "umad" device and an
> +             "issm" device attached. For example, a two-port HCA will have
> +             two umad devices and two issm devices, while a switch will have
> +             one device of each type (for switch port 0).
> +
> +             ibdev:  (RO) Show Infiniband (IB) device name
> +
> +             port:   (RO) Display port number
> +
> +
> +What:                /sys/class/infiniband_mad/abi_version
> +Date:                Apr, 2005
> +KernelVersion:       v2.6.12
> +Contact:     [email protected]
> +Description:
> +             (RO) Value is incremented if any changes are made that break
> +             userspace ABI compatibility of umad & issm devices.
> +
> +
> +What:                /sys/class/infiniband_cm/ucmN/ibdev
> +Date:                Oct, 2005
> +KernelVersion:       v2.6.14
> +Contact:     [email protected]
> +Description:
> +             (RO) Display Infiniband (IB) device name
> +
> +
> +What:                /sys/class/infiniband_cm/abi_version
> +Date:                Oct, 2005
> +KernelVersion:       v2.6.14
> +Contact:     [email protected]
> +Description:
> +             (RO) Value is incremented if any changes are made that break
> +             userspace ABI compatibility of ucm devices.
> +
> +
> +What:                /sys/class/infiniband_verbs/uverbsN/ibdev
> +What:                /sys/class/infiniband_verbs/uverbsN/abi_version
> +Date:                Sept, 2005
> +KernelVersion:       v2.6.14
> +Contact:     [email protected]
> +Description:
> +             ibdev:          (RO) Display Infiniband (IB) device name
> +
> +             abi_version:    (RO) Show ABI version of IB device specific
> +                             interfaces.
> +
> +
> +What:                /sys/class/infiniband_verbs/abi_version
> +Date:                Sep, 2005
> +KernelVersion:       v2.6.14
> +Contact:     [email protected]
> +Description:
> +             (RO) Value is incremented if any changes are made that break
> +             userspace ABI compatibility uverbs devices.
> +
> +
> +sysfs interface for Mellanox IB HCA low-level driver (mthca)
> +------------------------------------------------------------
> +
> +What:                /sys/class/infiniband/mthcaX/hw_rev
> +What:                /sys/class/infiniband/mthcaX/hca_type
> +What:                /sys/class/infiniband/mthcaX/board_id
> +Date:                Apr, 2005
> +KernelVersion:       v2.6.12
> +Contact:     [email protected]
> +Description:
> +             hw_rev:         (RO) Hardware revision number
> +
> +             hca_type:       (RO) Host Channel Adapter type: MT23108, MT25208
> +                             (MT23108 compat mode), MT25208 or MT25204
> +
> +             board_id:       (RO) Manufacturing board ID
> +
> +
> +sysfs interface for Chelsio T3 RDMA Driver (cxgb3)
> +--------------------------------------------------
> +
> +What:                /sys/class/infiniband/cxgb3_X/hw_rev
> +What:                /sys/class/infiniband/cxgb3_X/hca_type
> +What:                /sys/class/infiniband/cxgb3_X/board_id
> +Date:                Feb, 2007
> +KernelVersion:       v2.6.21
> +Contact:     [email protected]
> +Description:
> +             hw_rev:         (RO) Hardware revision number
> +
> +             hca_type:       (RO) HCA type. Here it is a driver short name.
> +                             It should normally match the name in its bus
> +                             driver structure (e.g.  pci_driver::name).
> +
> +             board_id:       (RO) Manufacturing board id
> +
> +
> +sysfs interface for Mellanox ConnectX HCA IB driver (mlx4)
> +----------------------------------------------------------
> +
> +What:                /sys/class/infiniband/mlx4_X/hw_rev
> +What:                /sys/class/infiniband/mlx4_X/hca_type
> +What:                /sys/class/infiniband/mlx4_X/board_id
> +Date:                Sep, 2007
> +KernelVersion:       v2.6.24
> +Contact:     [email protected]
> +Description:
> +             hw_rev:         (RO) Hardware revision number
> +
> +             hca_type:       (RO) Host channel adapter type
> +
> +             board_id:       (RO) Manufacturing board ID
> +
> +
> +What:                
> /sys/class/infiniband/mlx4_X/iov/ports/<port-num>/gids/<n>
> +What:                
> /sys/class/infiniband/mlx4_X/iov/ports/<port-num>/admin_guids/<n>
> +What:                
> /sys/class/infiniband/mlx4_X/iov/ports/<port-num>/pkeys/<n>
> +What:                /sys/class/infiniband/mlx4_X/iov/ports/<port-num>/mcgs/
> +What:                
> /sys/class/infiniband/mlx4_X/iov/ports/<pci-slot-num>/ports/<m>/gid_idx/0
> +What:                
> /sys/class/infiniband/mlx4_X/iov/ports/<pci-slot-num>/ports/<m>/pkey_idx/<n>
> +Date:                Aug, 2012
> +KernelVersion:       v3.6.15
> +Contact:     [email protected]
> +Description:
> +             The sysfs iov directory is used to manage and examine the port
> +             P_Key and guid paravirtualization. This directory is added only
> +             for the master -- slaves do not have it.
> +
> +             Under iov/ports, the administrator may examine the gid and P_Key
> +             tables as they are present in the device (and as are seen in the
> +             "network view" presented to the SM).
> +
> +             The "pkeys" and "gids" subdirectories contain one file for each
> +             entry in the port's P_Key or GID table respectively. For
> +             example, ports/1/pkeys/10 contains the value at index 10 in port
> +             1's P_Key table.
> +
> +             gids/<n>:               (RO) The physical port gids n = 0..127
> +
> +             admin_guids/<n>:        (RW) Allows examining or changing the
> +                                     administrative state of a given GUID
> +                                     n = 0..127
> +
> +             pkeys/<n>:              (RO) Displays the contents of the 
> physical
> +                                     key table n = 0..126
> +
> +             mcgs/:                  (RO) Muticast group table
> +
> +             <m>/gid_idx/0:          (RO) Display the GID mapping m = 1..2
> +
> +             <m>/pkey_idx/<n>:       (RW) Writable except for RoCE pkeys.
> +                                     m = 1..2, n = 0..126
> +
> +                                     Under the iov/<pci slot number>
> +                                     directories, the admin may map the index
> +                                     numbers in the physical tables (as under
> +                                     iov/ports) to the paravirtualized index
> +                                     numbers that guests see.
> +
> +                                     For example, if the administrator, for
> +                                     port 1 on guest 2 maps physical pkey
> +                                     index 10 to virtual index 1, then that
> +                                     guest, whenever it uses its pkey index
> +                                     1, will actually be using the real pkey
> +                                     index 10.
> +
> +
> +What:                
> /sys/class/infiniband/mlx4_X/iov/<pci-slot-num>/ports/<m>/smi_enabled
> +What:           
> /sys/class/infiniband/mlx4_X/iov/<pci-slot-num>/ports/<m>/enable_smi_admin
> +Date:                May, 2014
> +KernelVersion:       v3.15.7
> +Contact:     [email protected]
> +Description:
> +             Enabling QP0 on VFs for selected VF/port. By default, no VFs are
> +             enabled for QP0 operation.
> +
> +             smi_enabled:    (RO) Indicates whether smi is currently enabled
> +                             for the indicated VF/port
> +
> +             enable_smi_admin:(RW) Used by the admin to request that smi
> +                             capability be enabled or disabled for the
> +                             indicated VF/port. 0 = disable, 1 = enable.
> +
> +             The requested enablement will occur at the next reset of the VF
> +             (e.g. driver restart on the VM which owns the VF).
> +
> +
> +sysfs interface for NetEffect RNIC Low-Level iWARP driver (nes)
> +---------------------------------------------------------------
> +
> +What:                /sys/class/infiniband/nesX/hw_rev
> +What:                /sys/class/infiniband/nesX/hca_type
> +What:                /sys/class/infiniband/nesX/board_id
> +Date:                Feb, 2008
> +KernelVersion:       v2.6.25
> +Contact:     [email protected]
> +Description:
> +             hw_rev:         (RO) Hardware revision number
> +
> +             hca_type:       (RO) Host Channel Adapter type (NEX020)
> +
> +             board_id:       (RO) Manufacturing board id
> +
> +
> +sysfs interface for Chelsio T4/T5 RDMA driver (cxgb4)
> +-----------------------------------------------------
> +
> +What:                /sys/class/infiniband/cxgb4_X/hw_rev
> +What:                /sys/class/infiniband/cxgb4_X/hca_type
> +What:                /sys/class/infiniband/cxgb4_X/board_id
> +Date:                Apr, 2010
> +KernelVersion:       v2.6.35
> +Contact:     [email protected]
> +Description:
> +
> +             hw_rev:         (RO) Hardware revision number
> +
> +             hca_type:       (RO) Driver short name. Should normally match
> +                             the name in its bus driver structure (e.g.
> +                             pci_driver::name)
> +
> +             board_id:       (RO) Manufacturing board id. (Vendor + device
> +                             information)
> +
> +
> +sysfs interface for Intel IB driver qib
> +---------------------------------------
> +
> +What:                /sys/class/infiniband/qibX/version
> +What:                /sys/class/infiniband/qibX/hw_rev
> +What:                /sys/class/infiniband/qibX/hca_type
> +What:                /sys/class/infiniband/qibX/board_id
> +What:                /sys/class/infiniband/qibX/boardversion
> +What:                /sys/class/infiniband/qibX/nctxts
> +What:                /sys/class/infiniband/qibX/localbus_info
> +What:                /sys/class/infiniband/qibX/tempsense
> +What:                /sys/class/infiniband/qibX/serial
> +What:                /sys/class/infiniband/qibX/nfreectxts
> +What:                /sys/class/infiniband/qibX/chip_reset
> +Date:                May, 2010
> +KernelVersion:       v2.6.35
> +Contact:     [email protected]
> +Description:
> +             version:        (RO) Display version information of installed 
> software
> +                             and drivers.
> +
> +             hw_rev:         (RO) Hardware revision number
> +
> +             hca_type:       (RO) Host channel adapter type
> +
> +             board_id:       (RO) Manufacturing board id
> +
> +             boardversion:   (RO) Current version of the chip architecture
> +
> +             nctxts:         (RO) Return the number of user ports (contexts)
> +                             available
> +
> +             localbus_info:  (RO) Human readable localbus info
> +
> +             tempsense:      (RO) Display temp sense registers in decimal
> +
> +             serial:         (RO) Serial number of the HCA
> +
> +             nfreectxts:     (RO) The number of free user ports (contexts)
> +                             available.
> +
> +             chip_reset:     (WO) Reset the chip if possible by writing
> +                             "reset" to this file. Only allowed if no user
> +                             contexts are open that use chip resources.
> +
> +
> +What:                /sys/class/infiniband/qibX/ports/N/sl2vl/[0-15]
> +Date:                May, 2010
> +KernelVersion:       v2.6.35
> +Contact:     [email protected]
> +Description:
> +             (RO) The directory contains 16 files numbered 0-15 that specify
> +             the Service Level (SL). Listing the SL files returns the Virtual
> +             Lane (VL) as programmed by the SL.
> +
> +What:                
> /sys/class/infiniband/qibX/ports/N/CCMgtA/cc_settings_bin
> +What:                /sys/class/infiniband/qibX/ports/N/CCMgtA/cc_table_bin
> +Date:                May, 2010
> +KernelVersion:       v2.6.35
> +Contact:     [email protected]
> +Description:
> +             Per-port congestion control. Both are binary attributes.
> +
> +             cc_table_bin:   (RO) Congestion control table size followed by
> +                             table entries.
> +
> +             cc_settings_bin:(RO) Congestion settings: port control, control
> +                             map and an array of 16 entries for the
> +                             congestion entries - increase, timer, event log
> +                             trigger threshold and the minimum injection rate
> +                             delay.
> +
> +What:                /sys/class/infiniband/qibX/ports/N/linkstate/loopback
> +What:                
> /sys/class/infiniband/qibX/ports/N/linkstate/led_override
> +What:                
> /sys/class/infiniband/qibX/ports/N/linkstate/hrtbt_enable
> +What:                /sys/class/infiniband/qibX/ports/N/linkstate/status
> +What:                /sys/class/infiniband/qibX/ports/N/linkstate/status_str
> +Date:                May, 2010
> +KernelVersion:       v2.6.35
> +Contact:     [email protected]
> +Description:
> +             [to be documented]
> +
> +             loopback:       (WO)
> +             led_override:   (WO)
> +             hrtbt_enable:   (RW)
> +             status:         (RO)
> +
> +             status_str:     (RO) Displays information about the link state,
> +                             possible cable/switch problems, and hardware
> +                             errors. Possible states are- "Initted",
> +                             "Present", "IB_link_up", "IB_configured" or
> +                             "Fatal_Hardware_Error".
> +
> +What:                
> /sys/class/infiniband/qibX/ports/N/diag_counters/rc_resends
> +What:                
> /sys/class/infiniband/qibX/ports/N/diag_counters/seq_naks
> +What:                
> /sys/class/infiniband/qibX/ports/N/diag_counters/rdma_seq
> +What:                
> /sys/class/infiniband/qibX/ports/N/diag_counters/rnr_naks
> +What:                
> /sys/class/infiniband/qibX/ports/N/diag_counters/other_naks
> +What:                
> /sys/class/infiniband/qibX/ports/N/diag_counters/rc_timeouts
> +What:                
> /sys/class/infiniband/qibX/ports/N/diag_counters/look_pkts
> +What:                
> /sys/class/infiniband/qibX/ports/N/diag_counters/pkt_drops
> +What:                
> /sys/class/infiniband/qibX/ports/N/diag_counters/dma_wait
> +What:                
> /sys/class/infiniband/qibX/ports/N/diag_counters/unaligned
> +Date:                May, 2010
> +KernelVersion:       v2.6.35
> +Contact:     [email protected]
> +Description:
> +             [to be documented]
> +
> +
> +sysfs interface for Mellanox Connect-IB HCA driver mlx5
> +-------------------------------------------------------
> +
> +What:                /sys/class/infiniband/mlx5_X/hw_rev
> +What:                /sys/class/infiniband/mlx5_X/hca_type
> +What:                /sys/class/infiniband/mlx5_X/reg_pages
> +What:                /sys/class/infiniband/mlx5_X/fw_pages
> +Date:                Jul, 2013
> +KernelVersion:       v3.11
> +Contact:     [email protected]
> +Description:
> +             [to be documented]
> +
> +
> +sysfs interface for Cisco VIC (usNIC) Verbs Driver
> +--------------------------------------------------
> +
> +What:                /sys/class/infiniband/usnic_X/board_id
> +What:                /sys/class/infiniband/usnic_X/config
> +What:                /sys/class/infiniband/usnic_X/qp_per_vf
> +What:                /sys/class/infiniband/usnic_X/max_vf
> +What:                /sys/class/infiniband/usnic_X/cq_per_vf
> +What:                /sys/class/infiniband/usnic_X/iface
> +Date:                Sep, 2013
> +KernelVersion:       v3.14
> +Contact:     Christian Benvenuti <[email protected]>,
> +             Dave Goodell <[email protected]>,
> +             [email protected]
> +Description:
> +
> +             board_id:       (RO) Manufacturing board id
> +
> +             config:         (RO) Report the configuration for this PF
> +
> +             qp_per_vf:      (RO) Queue pairs per virtual function.
> +
> +             max_vf:         (RO) Max virtual functions
> +
> +             cq_per_vf:      (RO) Completion queue per virtual function
> +
> +             iface:          (RO) Shows which network interface this usNIC
> +                             entry is associated to (visible with ifconfig).
> +
> +What:                /sys/class/infiniband/usnic_X/qpn/summary
> +What:                /sys/class/infiniband/usnic_X/qpn/context
> +Date:                Sep, 2013
> +KernelVersion:       v3.14
> +Contact:     Christian Benvenuti <[email protected]>,
> +             Dave Goodell <[email protected]>,
> +             [email protected]
> +Description:
> +             [to be documented]
> +
> +
> +sysfs interface for Emulex RoCE HCA Driver
> +------------------------------------------
> +
> +What:                /sys/class/infiniband/ocrdmaX/hw_rev
> +Date:                Feb, 2014
> +KernelVersion:       v3.14
> +Description:
> +             hw_rev:         (RO) Hardware revision number
> +
> +What:                /sys/class/infiniband/ocrdmaX/hca_type
> +Date:                Jun, 2014
> +KernelVersion:       v3.16
> +Contact:     [email protected]
> +Description:
> +             hca_type:       (RO) Display FW version
> +
> +
> +sysfs interface for Intel Omni-Path driver (HFI1)
> +-------------------------------------------------
> +
> +What:                /sys/class/infiniband/hfi1_X/hw_rev
> +What:                /sys/class/infiniband/hfi1_X/board_id
> +What:                /sys/class/infiniband/hfi1_X/nctxts
> +What:                /sys/class/infiniband/hfi1_X/serial
> +What:                /sys/class/infiniband/hfi1_X/chip_reset
> +What:                /sys/class/infiniband/hfi1_X/boardversion
> +What:                /sys/class/infiniband/hfi1_X/nfreectxts
> +What:                /sys/class/infiniband/hfi1_X/tempsense
> +Date:                May, 2016
> +KernelVersion:       v4.6
> +Contact:     [email protected]
> +Description:
> +             hw_rev:         (RO) Hardware revision number
> +
> +             board_id:       (RO) Manufacturing board id
> +
> +             nctxts:         (RO) Total contexts available.
> +
> +             serial:         (RO) Board serial number
> +
> +             chip_reset:     (WO) Write "reset" to this file to reset the
> +                             chip if possible. Only allowed if no user
> +                             contexts are open that use chip resources.
> +
> +             boardversion:   (RO) Human readable board info
> +
> +             nfreectxts:     (RO) The number of free user ports (contexts)
> +                             available.
> +
> +             tempsense:      (RO) Thermal sense information
> +
> +
> +What:                
> /sys/class/infiniband/hfi1_X/ports/N/CCMgtA/cc_settings_bin
> +What:                /sys/class/infiniband/hfi1_X/ports/N/CCMgtA/cc_table_bin
> +What:                /sys/class/infiniband/hfi1_X/ports/N/CCMgtA/cc_prescan
> +Date:                May, 2016
> +KernelVersion:       v4.6
> +Contact:     [email protected]
> +Description:
> +             Per-port congestion control.
> +
> +             cc_table_bin:   (RO) CCA tables used by PSM2 Congestion control
> +                             table size followed by table entries. Binary
> +                             attribute.
> +
> +             cc_settings_bin:(RO) Congestion settings: port control, control
> +                             map and an array of 16 entries for the
> +                             congestion entries - increase, timer, event log
> +                             trigger threshold and the minimum injection rate
> +                             delay. Binary attribute.
> +
> +             cc_prescan:     (RW) enable prescanning for faster BECN
> +                             response. Write "on" to enable and "off" to
> +                             disable.
> +
> +What:                /sys/class/infiniband/hfi1_X/ports/N/sc2vl/[0-31]
> +What:                /sys/class/infiniband/hfi1_X/ports/N/sl2sc/[0-31]
> +What:                /sys/class/infiniband/hfi1_X/ports/N/vl2mtu/[0-15]
> +Date:                May, 2016
> +KernelVersion:       v4.6
> +Contact:     [email protected]
> +Description:
> +             sc2vl/:         (RO) 32 files (0 - 31) used to translate sl->vl
> +
> +             sl2sc/:         (RO) 32 files (0 - 31) used to translate sl->sc
> +
> +             vl2mtu/:        (RO) 16 files (0 - 15) used to determine MTU 
> for vl
> +
> +
> +What:                /sys/class/infiniband/hfi1_X/sdma_N/cpu_list
> +What:                /sys/class/infiniband/hfi1_X/sdma_N/vl
> +Date:                Sept, 2016
> +KernelVersion:       v4.8
> +Contact:     [email protected]
> +Description:
> +             sdma<N>/ contains one directory per sdma engine (0 - 15)
> +
> +             cpu_list:       (RW) List of cpus for user-process to sdma
> +                             engine assignment.
> +
> +             vl:             (RO) Displays the virtual lane (vl) the sdma
> +                             engine maps to.
> +
> +
> +sysfs interface for Intel(R) X722 iWARP i40iw driver
> +----------------------------------------------------
> +
> +What:                /sys/class/infiniband/i40iwX/hw_rev
> +What:                /sys/class/infiniband/i40iwX/hca_type
> +What:                /sys/class/infiniband/i40iwX/board_id
> +Date:                Jan, 2016
> +KernelVersion:       v4.10
> +Contact:     [email protected]
> +Description:
> +             hw_rev:         (RO) Hardware revision number
> +
> +             hca_tyoe:       (RO) Show HCA type (I40IW)
> +
> +             board_id:       (RO) I40IW board ID
> +
> +
> +sysfs interface for QLogic qedr NIC Driver
> +------------------------------------------
> +
> +What:                /sys/class/infiniband/qedrX/hw_rev
> +What:                /sys/class/infiniband/qedrX/hca_type
> +Date:                Oct, 2016
> +KernelVersion:       v4.10
> +Contact:     [email protected]
> +Description:
> +
> +             hw_rev:         (RO) Hardware revision number
> +
> +             hca_type:       (RO) Display HCA type
> +
> +
> +sysfs interface for VMware Paravirtual RDMA driver
> +--------------------------------------------------
> +
> +What:                /sys/class/infiniband/vmw_pvrdmaX/hw_rev
> +What:                /sys/class/infiniband/vmw_pvrdmaX/hca_type
> +What:                /sys/class/infiniband/vmw_pvrdmaX/board_id
> +Date:                Oct, 2016
> +KernelVersion:       v4.10
> +Contact:     [email protected]
> +Description:
> +
> +             hw_rev:         (RO) Hardware revision number
> +
> +             hca_type:       (RO) Host channel adapter type
> +
> +             board_id:       (RO) Display PVRDMA manufacturing board ID
> +
> +
> +sysfs interface for Broadcom NetXtreme-E RoCE driver
> +----------------------------------------------------
> +
> +What:                /sys/class/infiniband/bnxt_reX/fw_rev
> +What:                /sys/class/infiniband/bnxt_reX/hw_rev
> +What:                /sys/class/infiniband/bnxt_reX/hca_type
> +Date:                Feb, 2017
> +KernelVersion:       v4.11
> +Contact:     [email protected]
> +Description:
> +             fw_rev:         (RO) Firmware version
> +
> +             hw_rev:         (RO) Hardware revision number
> +
> +             hca_type:       (RO) Host channel adapter type
> 
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