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docs: filesystems: convert spufs/spu_run.txt to ReST 

This file is at groff output format. Manually convert it to
ReST format, trying to preserve a similar output after parsed.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/7d8ee1edf5ef0137009bc65ff0441826ce555895.1588021877.git.mchehab+huawei@kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Mauro Carvalho Chehab 2020-04-27 23:17:16 +02:00 committed by Jonathan Corbet
parent 299cd2747c
commit e2975d7ca8
2 changed files with 43 additions and 25 deletions
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1
Documentation/filesystems/spufs/index.rst
View File

@ -10,3 +10,4 @@ SPU Filesystem
spufs
spu_create
spu_run

67
Documentation/filesystems/spufs/spu_run.txt → Documentation/filesystems/spufs/spu_run.rst
View File

@ -1,17 +1,26 @@
SPU_RUN(2) Linux Programmer's Manual SPU_RUN(2)
.. SPDX-License-Identifier: GPL-2.0
=======
spu_run
=======
NAME
Name
====
spu_run - execute an spu context
SYNOPSIS
#include <sys/spu.h>
Synopsis
========
int spu_run(int fd, unsigned int *npc, unsigned int *event);
::
DESCRIPTION
#include <sys/spu.h>
int spu_run(int fd, unsigned int *npc, unsigned int *event);
Description
===========
The spu_run system call is used on PowerPC machines that implement the
Cell Broadband Engine Architecture in order to access Synergistic Pro-
cessor Units (SPUs). It uses the fd that was returned from spu_cre-
@ -45,24 +54,31 @@ DESCRIPTION
If NULL is passed as the event argument, these errors will result in a
signal delivered to the calling process.
RETURN VALUE
Return Value
============
spu_run returns the value of the spu_status register or -1 to indicate
an error and set errno to one of the error codes listed below. The
spu_status register value contains a bit mask of status codes and
optionally a 14 bit code returned from the stop-and-signal instruction
on the SPU. The bit masks for the status codes are:
0x02 SPU was stopped by stop-and-signal.
0x02
SPU was stopped by stop-and-signal.
0x04 SPU was stopped by halt.
0x04
SPU was stopped by halt.
0x08 SPU is waiting for a channel.
0x08
SPU is waiting for a channel.
0x10 SPU is in single-step mode.
0x10
SPU is in single-step mode.
0x20 SPU has tried to execute an invalid instruction.
0x20
SPU has tried to execute an invalid instruction.
0x40 SPU has tried to access an invalid channel.
0x40
SPU has tried to access an invalid channel.
0x3fff0000
The bits masked with this value contain the code returned from
@ -71,7 +87,8 @@ RETURN VALUE
There are always one or more of the lower eight bits set or an error
code is returned from spu_run.
ERRORS
Errors
======
EAGAIN or EWOULDBLOCK
fd is in non-blocking mode and spu_run would block.
@ -93,29 +110,29 @@ ERRORS
not loaded.
NOTES
Notes
=====
spu_run is meant to be used from libraries that implement a more
abstract interface to SPUs, not to be used from regular applications.
See http://www.bsc.es/projects/deepcomputing/linuxoncell/ for the rec-
ommended libraries.
CONFORMING TO
Conforming to
=============
This call is Linux specific and only implemented by the ppc64 architec-
ture. Programs using this system call are not portable.
BUGS
Bugs
====
The code does not yet fully implement all features lined out here.
AUTHOR
Author
======
Arnd Bergmann <arndb@de.ibm.com>
SEE ALSO
See Also
========
capabilities(7), close(2), spu_create(2), spufs(7)
Linux 2005-09-28 SPU_RUN(2)