daplt(7D) Devices daplt(7D)NAMEdaplt - Tavor uDAPL service driver
SYNOPSIS
daplt@0:daplt
DESCRIPTION
The daplt module is the driver component of the uDAPL service provider
for Tavor which implements the provider functions of the uDAPL Specifi‐
cation 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 regis‐
ters, 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 TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Architecture │SPARC, x86 │
├─────────────────────────────┼─────────────────────────────┤
│Availability │SUNWdapltr │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOmmap(2), libdat(3LIB), driver.conf(4), attributes(5), ib(7D), ibcm(7D),
ibdm(7D), ibtl(7D), tavor(7D)
uDAPL Specification 1.2
SunOS 5.10 12 Oct 2004 daplt(7D)
