linux-toradex.git/Documentation/mic, branch v3.18.4

Documentation: update include path for mpssd

2014-10-03T13:48:20+00:00

sysfs.c includes mpssd.h which includes virtio_ids.h.
sysfs.c doesn't have the proper include flags set to use the latest
headers, so this causes a build error if the system headers are too old.

Signed-off-by: Peter Foley 
Cc: rdunlap@infradead.org
Cc: linux-doc@vger.kernel.org
Cc: sudeep.dutt@intel.com
Cc: nikhil.rao@intel.com
Cc: ashutosh.dixit@intel.com
Cc: akpm@linux-foundation.org
Cc: gregkh@linuxfoundation.org
Cc: harshavardhan.r.kharche@intel.com
Cc: caz.yokoyama@intel.com
Cc: dasaratharaman.chandramouli@intel.com
Cc: jkosina@suse.cz
Signed-off-by: Jiri Kosina

Documentation: support glibc versions without htole macros

2014-09-26T09:02:58+00:00

glibc 2.9 introduced the htole<16/32/64> macros, add them to
tools/include to support older versions of glibc.

Reported-by: Andrew Morton 
Signed-off-by: Peter Foley 
Signed-off-by: Randy Dunlap 
Signed-off-by: Jiri Kosina

Documentation: fix misc. warnings

2014-09-26T09:02:57+00:00

Fix a few warnings that gcc emits during a default build.

Signed-off-by: Peter Foley 
Signed-off-by: Randy Dunlap 
Signed-off-by: Jiri Kosina

Documentation: add makefiles for more targets

2014-09-26T09:02:56+00:00

Add a bunch of previously unbuilt source files to the Documentation build
machinery.

Signed-off-by: Peter Foley 
Signed-off-by: Randy Dunlap 
Signed-off-by: Jiri Kosina

misc: mic: add support for loading/unloading dma driver

2014-07-12T01:31:12+00:00

modprobe dma driver upon start and remove it upon unload.

Signed-off-by: Siva Yerramreddy 
Signed-off-by: Greg Kroah-Hartman

misc: mic: Add mic bus and dma driver documentation

2014-07-12T01:27:56+00:00

Added an overview of mic bus and dma driver.

Reviewed-by: Ashutosh Dixit 
Reviewed-by: Nikhil Rao 
Reviewed-by: Sudeep Dutt 
Signed-off-by: Siva Yerramreddy 
Signed-off-by: Greg Kroah-Hartman

misc: mic: Fix endianness issues.

2013-11-27T19:03:38+00:00

Endianness issues are now consistent as per the documentation in
host/mic_virtio.h. Sparse warnings related to endianness are also fixed.
Note that the MIC driver implementation assumes that the host can be
both BE or LE whereas the card is always LE.

Reported-by: Fengguang Wu 
Reviewed-by: Sudeep Dutt 
Reviewed-by: Nikhil Rao 
Signed-off-by: Ashutosh Dixit 
Signed-off-by: Greg Kroah-Hartman

misc: mic: Fix user space namespace pollution from mic_common.h.

2013-11-27T19:03:38+00:00

Avoid declaring ALIGN() and __aligned() in
include/uapi/linux/mic_common.h since they pollute user space
namespace. Also, mic_aligned_size() can be simply replaced simply by
sizeof() since all structures where mic_aligned_size() is used are
declared using __attribute__ ((aligned(8)));

--
>From mail from H Peter Anvin about this:

On Fri, Nov 08, 2013 H Peter Anvin  wrote:
Subject: Namespace pollution in mic_common.h

This puts two macros, ALIGN() and __aligned(), into arbitrary user space
namespace.  This really isn't safe or acceptable, especially since those
symbols are highly generic.
...
When these structures are forced-aligned, they will in fact have padding
automatically added by the compiler to an 8-byte boundary anyway, so
mic_aligned_size() does nothing.
...

Reported-by: H Peter Anvin 
Reviewed-by: Sudeep Dutt 
Signed-off-by: Nikhil Rao 
Signed-off-by: Ashutosh Dixit 
Signed-off-by: Greg Kroah-Hartman

misc: mic: Bug fix for sysfs poll usage.

2013-11-27T19:03:38+00:00

MIC user space daemon poll's on sysfs changes. The documentation for
sysfs_poll(...) in fs/sysfs/file.c states that "Once poll/select
indicates that the value has changed, you need to close and re-open the
file, or seek to 0 and read again". This step was missed out earlier and
resulted in the daemon spinning continuously rather than getting blocked
in 'poll'. This bug was exposed by commit aea585ef8fa65163 introduced as
part of sysfs changes in 3.13-rc1. A seek to 0 has been introduced to
fix it.

Reviewed-by: Sudeep Dutt 
Signed-off-by: Ashutosh Dixit 
Signed-off-by: Greg Kroah-Hartman

misc: mic: Enable OSPM suspend and resume support.

2013-10-06T01:01:42+00:00

This patch enables support for OSPM suspend and resume in the MIC
driver. During a host suspend event, the driver performs an
orderly shutdown of the cards if they are online. Upon resume, any
cards that were previously online before suspend are rebooted.
The driver performs an orderly shutdown of the card primarily to
ensure that applications in the card are terminated and mounted
devices are safely un-mounted before the card is powered down in
the event of an OSPM suspend.

The driver makes use of the MIC daemon to accomplish OSPM suspend
and resume. The driver registers a PM notifier per MIC device.
The devices get notified synchronously during PM_SUSPEND_PREPARE and
PM_POST_SUSPEND phases.

During the PM_SUSPEND_PREPARE phase, the driver performs one of the
following three tasks.
1) If the card is 'offline', the driver sets the card to a
   'suspended' state and returns.
2) If the card is 'online', the driver initiates card shutdown by
   setting the card state to suspending. This notifies the MIC
   daemon which invokes shutdown and sets card state to 'suspended'.
   The driver returns after the shutdown is complete.
3) If the card is already being shutdown, possibly by a host user
   space application, the driver sets the card state to 'suspended'
   and returns after the shutdown is complete.

During the PM_POST_SUSPEND phase, the driver simply notifies the
daemon and returns. The daemon boots those cards that were previously
online during the suspend phase.

Signed-off-by: Ashutosh Dixit 
Signed-off-by: Nikhil Rao 
Signed-off-by: Harshavardhan R Kharche 
Signed-off-by: Sudeep Dutt 
Signed-off-by: Dasaratharaman Chandramouli 
Signed-off-by: Greg Kroah-Hartman