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This reverts commit 11c3b5c3e08f4d855cbef52883c266b9ab9df879.
Turns out that device_initialize shouldn't fail silently.
This series needs to be reworked in order to get into proper
shape.
Reported-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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This reverts commit 93e746db183b3bdbbda67900f79b5835f9cb388f.
Turns out that device_initialize shouldn't fail silently.
This series needs to be reworked in order to get into proper
shape.
Reported-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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This reverts commit b9daa99ee533578e3f88231e7a16784dcb44ec42.
Turns out that device_initialize shouldn't fail silently.
This series needs to be reworked in order to get into proper
shape.
Reported-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile: (31 commits)
powerpc/oprofile: fix whitespaces in op_model_cell.c
powerpc/oprofile: IBM CELL: add SPU event profiling support
powerpc/oprofile: fix cell/pr_util.h
powerpc/oprofile: IBM CELL: cleanup and restructuring
oprofile: make new cpu buffer functions part of the api
oprofile: remove #ifdef CONFIG_OPROFILE_IBS in non-ibs code
ring_buffer: fix ring_buffer_event_length()
oprofile: use new data sample format for ibs
oprofile: add op_cpu_buffer_get_data()
oprofile: add op_cpu_buffer_add_data()
oprofile: rework implementation of cpu buffer events
oprofile: modify op_cpu_buffer_read_entry()
oprofile: add op_cpu_buffer_write_reserve()
oprofile: rename variables in add_ibs_begin()
oprofile: rename add_sample() in cpu_buffer.c
oprofile: rename variable ibs_allowed to has_ibs in op_model_amd.c
oprofile: making add_sample_entry() inline
oprofile: remove backtrace code for ibs
oprofile: remove unused ibs macro
oprofile: remove unused components in struct oprofile_cpu_buffer
...
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This patch creates the new functions
oprofile_write_reserve()
oprofile_add_data()
oprofile_write_commit()
and makes them part of the oprofile api.
Signed-off-by: Robert Richter <robert.richter@amd.com>
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The ifdefs can be removed since the code is no longer ibs specific and
can be used for other purposes as well. IBS specific code is only in
op_model_amd.c.
Signed-off-by: Robert Richter <robert.richter@amd.com>
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The new ring buffer implementation allows the storage of samples with
different size. This patch implements the usage of the new sample
format to store ibs samples in the cpu buffer. Until now, writing to
the cpu buffer could lead to incomplete sampling sequences since IBS
samples were transfered in multiple samples. Due to a full buffer,
data could be lost at any time. This can't happen any more since the
complete data is reserved in advance and then stored in a single
sample.
Signed-off-by: Robert Richter <robert.richter@amd.com>
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This function provides access to attached data of a sample. It returns
the size of data including the current value. Also,
op_cpu_buffer_get_size() is available to check if there is data
attached.
Signed-off-by: Robert Richter <robert.richter@amd.com>
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This function can be used to attach data to a sample. It returns the
remaining free buffer size that has been reserved with
op_cpu_buffer_write_reserve().
Signed-off-by: Robert Richter <robert.richter@amd.com>
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Special events such as task or context switches are marked with an
escape code in the cpu buffer followed by an event code or a task
identifier. There is one escape code per event. To make escape
sequences also available for data samples the internal cpu buffer
format must be changed. The current implementation does not allow the
extension of event codes since this would lead to collisions with the
task identifiers. To avoid this, this patch introduces an event mask
that allows the storage of multiple events with one escape code. Now,
task identifiers are stored in the data section of the sample. The
implementation also allows the usage of custom data in a sample. As a
side effect the new code is much more readable and easier to
understand.
Signed-off-by: Robert Richter <robert.richter@amd.com>
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This implements the support of samples with attached data.
Signed-off-by: Robert Richter <robert.richter@amd.com>
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This function prepares the cpu buffer to write a sample.
Struct op_entry is used during operations on the ring buffer while
struct op_sample contains the data that is stored in the ring
buffer. Struct entry can be uninitialized. The function reserves a
data array that is specified by size. Use op_cpu_buffer_write_commit()
after preparing the sample. In case of errors a null pointer is
returned, otherwise the pointer to the sample.
Signed-off-by: Robert Richter <robert.richter@amd.com>
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This unifies usage of variable names within oprofile.
Signed-off-by: Robert Richter <robert.richter@amd.com>
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Rename the fucntion to op_add_sample() since there is a collision with
another one with the same name in buffer_sync.c.
Signed-off-by: Robert Richter <robert.richter@amd.com>
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Signed-off-by: Robert Richter <robert.richter@amd.com>
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This code is broken since a TRACE_BEGIN_CODE is never sent to the
daemon. The data becomes corrupt since the backtrace is interpreted as
ibs sample.
Signed-off-by: Robert Richter <robert.richter@amd.com>
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Signed-off-by: Robert Richter <robert.richter@amd.com>
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Signed-off-by: Robert Richter <robert.richter@amd.com>
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Signed-off-by: Robert Richter <robert.richter@amd.com>
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Signed-off-by: Robert Richter <robert.richter@amd.com>
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This patch removes the unused return parameter in
oprofile_begin_trace(). Also, oprofile_begin_trace() and
oprofile_end_trace() are inline now.
Signed-off-by: Robert Richter <robert.richter@amd.com>
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Make code more readable. No functional changes.
Signed-off-by: Robert Richter <robert.richter@amd.com>
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This patch removes add_us_sample() and simplifies add_sample(). Code
is much more readable now.
Signed-off-by: Robert Richter <robert.richter@amd.com>
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This patch adds the inline function __oprofile_add_ext_sample() to
cpu_buffer.c and thus reduces overhead when calling
oprofile_add_sample().
Signed-off-by: Robert Richter <robert.richter@amd.com>
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Reordering code to keep alloc/free functions together.
Signed-off-by: Robert Richter <robert.richter@amd.com>
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This patch moves ring buffer inline functions to cpu_buffer.c.
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Robert Richter <robert.richter@amd.com>
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This patch renames cpu buffer functions to something more oprofile
specific names. Functions will be moved to the global name space.
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Robert Richter <robert.richter@amd.com>
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This patch renames kernel-wide identifiers to something more oprofile
specific names.
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Robert Richter <robert.richter@amd.com>
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* git://git.infradead.org/mtd-2.6: (67 commits)
[MTD] [MAPS] Fix printk format warning in nettel.c
[MTD] [NAND] add cmdline parsing (mtdparts=) support to cafe_nand
[MTD] CFI: remove major/minor version check for command set 0x0002
[MTD] [NAND] ndfc driver
[MTD] [TESTS] Fix some size_t printk format warnings
[MTD] LPDDR Makefile and KConfig
[MTD] LPDDR extended physmap driver to support LPDDR flash
[MTD] LPDDR added new pfow_base parameter
[MTD] LPDDR Command set driver
[MTD] LPDDR PFOW definition
[MTD] LPDDR QINFO records definitions
[MTD] LPDDR qinfo probing.
[MTD] [NAND] pxa3xx: convert from ns to clock ticks more accurately
[MTD] [NAND] pxa3xx: fix non-page-aligned reads
[MTD] [NAND] fix nandsim sched.h references
[MTD] [NAND] alauda: use USB API functions rather than constants
[MTD] struct device - replace bus_id with dev_name(), dev_set_name()
[MTD] fix m25p80 64-bit divisions
[MTD] fix dataflash 64-bit divisions
[MTD] [NAND] Set the fsl elbc ECCM according the settings in bootloader.
...
Fixed up trivial debug conflicts in drivers/mtd/devices/{m25p80.c,mtd_dataflash.c}
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MTD size is 64-bit now...
Pointed out by Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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[dwmw2: updated and made to still register whole device first]
Signed-off-by: Philip Rakity <pakity@yahoo.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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The NOR Flash memory K8P2815UQB from Samsung uses the major version
number '0'. Add a quirk to cope with it.
Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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The current ndfc driver only compiles under arch/ppc. This arch was
removed from the kernel. I notice the event entry for the ndfc in
Kconfig has been removed in 2.6.28.
This patch converts the ndfc to a proper OF (OpenFirmware) driver. I
can give a working example of the DTS if needed.
The patch has been in production use on the PIKA Warp Appliance and is
in use by others. The Warp basically boots from NAND, so the ndfc driver
is very important to us.
Signed-off-by: Sean MacLennan <smaclennan@pikatech.com>
Acked-By: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Conflicts:
drivers/mtd/Makefile
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Add MTD tests to Kconfig and Makefiles.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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This test is designed to work for very long time and it tries to
wear few eraseblocks.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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This tests makes sure sub-pages on NAND MTD device work fine.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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This test just performs random operations on random eraseblocks.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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This test examines I/O speed of the flash device.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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A simple tests which reads whole MTD device one page at a time.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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This test checks that NAND pages read/write work fine.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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This test checks that OOB of a NAND MTD device works fine.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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We have two components to manage LPDDR flash memories in Linux.
1. It is a driver for chip probing and reading its capabilities
2. It is a device operations driver.
Signed-off-by: Alexey Korolev <akorolev@infradead.org>
Acked-by: Jared Hulbert <jaredeh@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Physmap is a generic map driver for different platforms and flash types.
We added support of LPDDR to physmap.
All changes here are related to introduction of new pfow_base parameter.
This parameter is valid in case of LPDDR chips only.
Signed-off-by: Alexey Korolev <akorolev@infradead.org>
Acked-by: Jared Hulbert <jaredeh@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Driver which handles device command operation.
Details on device operations are available here:
http://www.numonyx.com/Documents/Datasheets/DS-315768_Velocity-Discrete.pdf
Signed-off-by: Alexey Korolev <akorolev@infradead.org>
Acked-by: Jared Hulbert <jaredeh@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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LPDDR flash chips are based on completely new kind of chips probing.
Device capabilities are available via special request.
We sent field request command which contains Major and Minor numbers - and
recieve corresponend value.
All requests are performed within PFOW window.
Detailed information about qinfo records can be found here:
http://www.numonyx.com/Documents/Datasheets/DS-315768_Velocity-Discrete.pdf
Signed-off-by: Alexey Korolev <akorolev@infradead.org>
Acked-by: Jared Hulbert <jaredeh@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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The various fields in NDTR{01} are in units of clock ticks minus one, but the
ns2cycle macro mistakenly adds one, inflating the number of clock ticks and
making it impossible to set any of these fields to zero.
Signed-off-by: Matt Reimer <mreimer@vpop.net>
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Reads from non-page-aligned addresses were broken because while the
address to read from was correctly written to NDCB*, a full page was
always read. Fix this by ignoring the column and only using the page
address.
I suspect this whole-page behavior is due to the controller's need to
read the entire page in order to generate correct ECC. In the non-ECC
case this could be optimized to use the column address, and to set the
read length to what is being requested rather than the length of an
entire page.
Signed-off-by: Matt Reimer <mreimer@vpop.net>
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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