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Message-Id: <92801d45897bc5757ff82ca10756d313e9c8ac2e.1586960617.git.mchehab+huawei@kernel.org>
Date: Wed, 15 Apr 2020 16:32:40 +0200
From: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To: Linux Doc Mailing List <linux-doc@...r.kernel.org>
Cc: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
linux-kernel@...r.kernel.org, Jonathan Corbet <corbet@....net>
Subject: [PATCH 27/34] docs: filesystems: split spufs.txt into 3 separate files
This file has manpages for 3 different things. As we'll
be converting it to ReST, let's fist split it into their
individual components.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
---
.../filesystems/spufs/spu_create.txt | 119 +++++++++
Documentation/filesystems/spufs/spu_run.txt | 121 +++++++++
.../filesystems/{ => spufs}/spufs.txt | 245 ------------------
3 files changed, 240 insertions(+), 245 deletions(-)
create mode 100644 Documentation/filesystems/spufs/spu_create.txt
create mode 100644 Documentation/filesystems/spufs/spu_run.txt
rename Documentation/filesystems/{ => spufs}/spufs.txt (59%)
diff --git a/Documentation/filesystems/spufs/spu_create.txt b/Documentation/filesystems/spufs/spu_create.txt
new file mode 100644
index 000000000000..8ede5a35340f
--- /dev/null
+++ b/Documentation/filesystems/spufs/spu_create.txt
@@ -0,0 +1,119 @@
+SPU_CREATE(2) Linux Programmer's Manual SPU_CREATE(2)
+
+
+
+NAME
+ spu_create - create a new spu context
+
+
+SYNOPSIS
+ #include <sys/types.h>
+ #include <sys/spu.h>
+
+ int spu_create(const char *pathname, int flags, mode_t mode);
+
+DESCRIPTION
+ The spu_create system call is used on PowerPC machines that implement
+ the Cell Broadband Engine Architecture in order to access Synergistic
+ Processor Units (SPUs). It creates a new logical context for an SPU in
+ pathname and returns a handle to associated with it. pathname must
+ point to a non-existing directory in the mount point of the SPU file
+ system (spufs). When spu_create is successful, a directory gets cre-
+ ated on pathname and it is populated with files.
+
+ The returned file handle can only be passed to spu_run(2) or closed,
+ other operations are not defined on it. When it is closed, all associ-
+ ated directory entries in spufs are removed. When the last file handle
+ pointing either inside of the context directory or to this file
+ descriptor is closed, the logical SPU context is destroyed.
+
+ The parameter flags can be zero or any bitwise or'd combination of the
+ following constants:
+
+ SPU_RAWIO
+ Allow mapping of some of the hardware registers of the SPU into
+ user space. This flag requires the CAP_SYS_RAWIO capability, see
+ capabilities(7).
+
+ The mode parameter specifies the permissions used for creating the new
+ directory in spufs. mode is modified with the user's umask(2) value
+ and then used for both the directory and the files contained in it. The
+ file permissions mask out some more bits of mode because they typically
+ support only read or write access. See stat(2) for a full list of the
+ possible mode values.
+
+
+RETURN VALUE
+ spu_create returns a new file descriptor. It may return -1 to indicate
+ an error condition and set errno to one of the error codes listed
+ below.
+
+
+ERRORS
+ EACCES
+ The current user does not have write access on the spufs mount
+ point.
+
+ EEXIST An SPU context already exists at the given path name.
+
+ EFAULT pathname is not a valid string pointer in the current address
+ space.
+
+ EINVAL pathname is not a directory in the spufs mount point.
+
+ ELOOP Too many symlinks were found while resolving pathname.
+
+ EMFILE The process has reached its maximum open file limit.
+
+ ENAMETOOLONG
+ pathname was too long.
+
+ ENFILE The system has reached the global open file limit.
+
+ ENOENT Part of pathname could not be resolved.
+
+ ENOMEM The kernel could not allocate all resources required.
+
+ ENOSPC There are not enough SPU resources available to create a new
+ context or the user specific limit for the number of SPU con-
+ texts has been reached.
+
+ ENOSYS the functionality is not provided by the current system, because
+ either the hardware does not provide SPUs or the spufs module is
+ not loaded.
+
+ ENOTDIR
+ A part of pathname is not a directory.
+
+
+
+NOTES
+ spu_create 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.
+
+
+FILES
+ pathname must point to a location beneath the mount point of spufs. By
+ convention, it gets mounted in /spu.
+
+
+CONFORMING TO
+ This call is Linux specific and only implemented by the ppc64 architec-
+ ture. Programs using this system call are not portable.
+
+
+BUGS
+ The code does not yet fully implement all features lined out here.
+
+
+AUTHOR
+ Arnd Bergmann <arndb@...ibm.com>
+
+SEE ALSO
+ capabilities(7), close(2), spu_run(2), spufs(7)
+
+
+
+Linux 2005-09-28 SPU_CREATE(2)
diff --git a/Documentation/filesystems/spufs/spu_run.txt b/Documentation/filesystems/spufs/spu_run.txt
new file mode 100644
index 000000000000..d5c6a00d0f97
--- /dev/null
+++ b/Documentation/filesystems/spufs/spu_run.txt
@@ -0,0 +1,121 @@
+SPU_RUN(2) Linux Programmer's Manual SPU_RUN(2)
+
+
+
+NAME
+ spu_run - execute an spu context
+
+
+SYNOPSIS
+ #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-
+ ate(2) to address a specific SPU context. When the context gets sched-
+ uled to a physical SPU, it starts execution at the instruction pointer
+ passed in npc.
+
+ Execution of SPU code happens synchronously, meaning that spu_run does
+ not return while the SPU is still running. If there is a need to exe-
+ cute SPU code in parallel with other code on either the main CPU or
+ other SPUs, you need to create a new thread of execution first, e.g.
+ using the pthread_create(3) call.
+
+ When spu_run returns, the current value of the SPU instruction pointer
+ is written back to npc, so you can call spu_run again without updating
+ the pointers.
+
+ event can be a NULL pointer or point to an extended status code that
+ gets filled when spu_run returns. It can be one of the following con-
+ stants:
+
+ SPE_EVENT_DMA_ALIGNMENT
+ A DMA alignment error
+
+ SPE_EVENT_SPE_DATA_SEGMENT
+ A DMA segmentation error
+
+ SPE_EVENT_SPE_DATA_STORAGE
+ A DMA storage error
+
+ If NULL is passed as the event argument, these errors will result in a
+ signal delivered to the calling process.
+
+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.
+
+ 0x04 SPU was stopped by halt.
+
+ 0x08 SPU is waiting for a channel.
+
+ 0x10 SPU is in single-step mode.
+
+ 0x20 SPU has tried to execute an invalid instruction.
+
+ 0x40 SPU has tried to access an invalid channel.
+
+ 0x3fff0000
+ The bits masked with this value contain the code returned from
+ stop-and-signal.
+
+ There are always one or more of the lower eight bits set or an error
+ code is returned from spu_run.
+
+ERRORS
+ EAGAIN or EWOULDBLOCK
+ fd is in non-blocking mode and spu_run would block.
+
+ EBADF fd is not a valid file descriptor.
+
+ EFAULT npc is not a valid pointer or status is neither NULL nor a valid
+ pointer.
+
+ EINTR A signal occurred while spu_run was in progress. The npc value
+ has been updated to the new program counter value if necessary.
+
+ EINVAL fd is not a file descriptor returned from spu_create(2).
+
+ ENOMEM Insufficient memory was available to handle a page fault result-
+ ing from an MFC direct memory access.
+
+ ENOSYS the functionality is not provided by the current system, because
+ either the hardware does not provide SPUs or the spufs module is
+ not loaded.
+
+
+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
+ This call is Linux specific and only implemented by the ppc64 architec-
+ ture. Programs using this system call are not portable.
+
+
+BUGS
+ The code does not yet fully implement all features lined out here.
+
+
+AUTHOR
+ Arnd Bergmann <arndb@...ibm.com>
+
+SEE ALSO
+ capabilities(7), close(2), spu_create(2), spufs(7)
+
+
+
+
+Linux 2005-09-28 SPU_RUN(2)
diff --git a/Documentation/filesystems/spufs.txt b/Documentation/filesystems/spufs/spufs.txt
similarity index 59%
rename from Documentation/filesystems/spufs.txt
rename to Documentation/filesystems/spufs/spufs.txt
index eb9e3aa63026..caf36aaae804 100644
--- a/Documentation/filesystems/spufs.txt
+++ b/Documentation/filesystems/spufs/spufs.txt
@@ -274,248 +274,3 @@ SEE ALSO
Linux 2005-09-28 SPUFS(2)
-
-------------------------------------------------------------------------------
-
-SPU_RUN(2) Linux Programmer's Manual SPU_RUN(2)
-
-
-
-NAME
- spu_run - execute an spu context
-
-
-SYNOPSIS
- #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-
- ate(2) to address a specific SPU context. When the context gets sched-
- uled to a physical SPU, it starts execution at the instruction pointer
- passed in npc.
-
- Execution of SPU code happens synchronously, meaning that spu_run does
- not return while the SPU is still running. If there is a need to exe-
- cute SPU code in parallel with other code on either the main CPU or
- other SPUs, you need to create a new thread of execution first, e.g.
- using the pthread_create(3) call.
-
- When spu_run returns, the current value of the SPU instruction pointer
- is written back to npc, so you can call spu_run again without updating
- the pointers.
-
- event can be a NULL pointer or point to an extended status code that
- gets filled when spu_run returns. It can be one of the following con-
- stants:
-
- SPE_EVENT_DMA_ALIGNMENT
- A DMA alignment error
-
- SPE_EVENT_SPE_DATA_SEGMENT
- A DMA segmentation error
-
- SPE_EVENT_SPE_DATA_STORAGE
- A DMA storage error
-
- If NULL is passed as the event argument, these errors will result in a
- signal delivered to the calling process.
-
-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.
-
- 0x04 SPU was stopped by halt.
-
- 0x08 SPU is waiting for a channel.
-
- 0x10 SPU is in single-step mode.
-
- 0x20 SPU has tried to execute an invalid instruction.
-
- 0x40 SPU has tried to access an invalid channel.
-
- 0x3fff0000
- The bits masked with this value contain the code returned from
- stop-and-signal.
-
- There are always one or more of the lower eight bits set or an error
- code is returned from spu_run.
-
-ERRORS
- EAGAIN or EWOULDBLOCK
- fd is in non-blocking mode and spu_run would block.
-
- EBADF fd is not a valid file descriptor.
-
- EFAULT npc is not a valid pointer or status is neither NULL nor a valid
- pointer.
-
- EINTR A signal occurred while spu_run was in progress. The npc value
- has been updated to the new program counter value if necessary.
-
- EINVAL fd is not a file descriptor returned from spu_create(2).
-
- ENOMEM Insufficient memory was available to handle a page fault result-
- ing from an MFC direct memory access.
-
- ENOSYS the functionality is not provided by the current system, because
- either the hardware does not provide SPUs or the spufs module is
- not loaded.
-
-
-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
- This call is Linux specific and only implemented by the ppc64 architec-
- ture. Programs using this system call are not portable.
-
-
-BUGS
- The code does not yet fully implement all features lined out here.
-
-
-AUTHOR
- Arnd Bergmann <arndb@...ibm.com>
-
-SEE ALSO
- capabilities(7), close(2), spu_create(2), spufs(7)
-
-
-
-Linux 2005-09-28 SPU_RUN(2)
-
-------------------------------------------------------------------------------
-
-SPU_CREATE(2) Linux Programmer's Manual SPU_CREATE(2)
-
-
-
-NAME
- spu_create - create a new spu context
-
-
-SYNOPSIS
- #include <sys/types.h>
- #include <sys/spu.h>
-
- int spu_create(const char *pathname, int flags, mode_t mode);
-
-DESCRIPTION
- The spu_create system call is used on PowerPC machines that implement
- the Cell Broadband Engine Architecture in order to access Synergistic
- Processor Units (SPUs). It creates a new logical context for an SPU in
- pathname and returns a handle to associated with it. pathname must
- point to a non-existing directory in the mount point of the SPU file
- system (spufs). When spu_create is successful, a directory gets cre-
- ated on pathname and it is populated with files.
-
- The returned file handle can only be passed to spu_run(2) or closed,
- other operations are not defined on it. When it is closed, all associ-
- ated directory entries in spufs are removed. When the last file handle
- pointing either inside of the context directory or to this file
- descriptor is closed, the logical SPU context is destroyed.
-
- The parameter flags can be zero or any bitwise or'd combination of the
- following constants:
-
- SPU_RAWIO
- Allow mapping of some of the hardware registers of the SPU into
- user space. This flag requires the CAP_SYS_RAWIO capability, see
- capabilities(7).
-
- The mode parameter specifies the permissions used for creating the new
- directory in spufs. mode is modified with the user's umask(2) value
- and then used for both the directory and the files contained in it. The
- file permissions mask out some more bits of mode because they typically
- support only read or write access. See stat(2) for a full list of the
- possible mode values.
-
-
-RETURN VALUE
- spu_create returns a new file descriptor. It may return -1 to indicate
- an error condition and set errno to one of the error codes listed
- below.
-
-
-ERRORS
- EACCES
- The current user does not have write access on the spufs mount
- point.
-
- EEXIST An SPU context already exists at the given path name.
-
- EFAULT pathname is not a valid string pointer in the current address
- space.
-
- EINVAL pathname is not a directory in the spufs mount point.
-
- ELOOP Too many symlinks were found while resolving pathname.
-
- EMFILE The process has reached its maximum open file limit.
-
- ENAMETOOLONG
- pathname was too long.
-
- ENFILE The system has reached the global open file limit.
-
- ENOENT Part of pathname could not be resolved.
-
- ENOMEM The kernel could not allocate all resources required.
-
- ENOSPC There are not enough SPU resources available to create a new
- context or the user specific limit for the number of SPU con-
- texts has been reached.
-
- ENOSYS the functionality is not provided by the current system, because
- either the hardware does not provide SPUs or the spufs module is
- not loaded.
-
- ENOTDIR
- A part of pathname is not a directory.
-
-
-
-NOTES
- spu_create 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.
-
-
-FILES
- pathname must point to a location beneath the mount point of spufs. By
- convention, it gets mounted in /spu.
-
-
-CONFORMING TO
- This call is Linux specific and only implemented by the ppc64 architec-
- ture. Programs using this system call are not portable.
-
-
-BUGS
- The code does not yet fully implement all features lined out here.
-
-
-AUTHOR
- Arnd Bergmann <arndb@...ibm.com>
-
-SEE ALSO
- capabilities(7), close(2), spu_run(2), spufs(7)
-
-
-
-Linux 2005-09-28 SPU_CREATE(2)
--
2.25.2
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