Content-type: text/html Man page of daplt

daplt

Section: Devices (7D)
Updated: 12 Oct 2004
Index Return to Main Contents
 

NAME

daplt - Tavor uDAPL service driver  

SYNOPSIS

[email protected]:daplt
 

DESCRIPTION

The daplt module is the driver component of the uDAPL service provider for Tavor which implements the provider functions of the uDAPL Specification 1.2 described under libdat(3LIB).

The daplt module is a child of the IB nexus driver, ib(7D), and layers on top of the Solaris kernel IB Transport Layer, ibtl(7D). The daplt driver uses the InfiniBand Transport Framework (IBTF). (See ibtl(7D), ibcm(7D), and ib(7D) to access privileged IB VERBS.)

The daplt driver copies out various HCA H/W object reference handles, including working and completion queues and User Access Region registers, to its own uDAPL service provider library for Tavor. The library can refer back to these object handles and use them to mmap(2) in the mapping of these H/W queues and registers from the Tavor HCA driver, tavor(7D). This process enables time-critical non-privileged IB VERBS such as send/receive work elements, RDMA read/write and memory window bind, to be invoked in the userland library and performed directly by the firmware or hardware. As a result, OS and network stack are bypassed, achieving true zero data copy with the lowest possible latency.  

FILES

/kernel/drv/sparcv9/daplt

64-bit SPARC ELF kernel driver

/kernel/drv/daplt

32-bit x86 ELF kernel driver

/kernel/drv/amd64/daplt

64-bit x86 ELF kernel driver

/kernel/drv/daplt.conf

driver configuration file

/dev/daplt

special character device.

 

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPEATTRIBUTE VALUE
ArchitectureSPARC, x86
AvailabilitySUNWdapltr

 

SEE ALSO

mmap(2), libdat(3LIB), driver.conf(4), attributes(5), ib(7D), ibcm(7D), ibdm(7D), ibtl(7D), tavor(7D)

uDAPL Specification 1.2


 

Index

NAME
SYNOPSIS
DESCRIPTION
FILES
ATTRIBUTES
SEE ALSO

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