02 Nov, 2017
1 commit
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Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.By default all files without license information are under the default
license of the kernel, which is GPL version 2.Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if
Reviewed-by: Philippe Ombredanne
Reviewed-by: Thomas Gleixner
Signed-off-by: Greg Kroah-Hartman
17 Jul, 2017
2 commits
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Add a flag that is passed to the write_init() callback, indicating
that the bitstream is compressed.The low-level driver will deal with the flag, or return an error,
if compressed bitstreams are not supported.Signed-off-by: Anatolij Gustschin
Reviewed-by: Andy Shevchenko
Signed-off-by: Alan Tull
Signed-off-by: Greg Kroah-Hartman -
Add a flag that is passed to the write_init() callback,
indicating that the SPI bitstream starts with LSB first.
SPI controllers usually send data with MSB first. If an
FPGA expects bitstream data as LSB first, the data must
be reversed either by the SPI controller or by the driver.Alternatively the bitstream could be prepared as bit-reversed
to avoid the bit-swapping while sending. This flag indicates
such bit-reversed SPI bitstream. The low-level driver will
deal with the flag and perform bit-reversing if needed.Signed-off-by: Anatolij Gustschin
Signed-off-by: Joshua Clayton
Signed-off-by: Alan Tull
Signed-off-by: Greg Kroah-Hartman
08 Apr, 2017
2 commits
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Adding the core functions necessary for a fpga-mgr driver
for the Altera Partial IP component. It is intended for
these functions to be used by the various bus implementations
like the platform bus or the PCIe bus.Signed-off-by: Matthew Gerlach
Acked-by: Alan Tull
Signed-off-by: Greg Kroah-Hartman -
Adding timeout for maximum allowed time for FPGA to go to
operating mode after a FPGA region has been programmed.Signed-off-by: Alan Tull
Signed-off-by: Greg Kroah-Hartman
17 Mar, 2017
1 commit
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Add a flag that is passed to the write_init() callback, indicating
that the bitstream is encrypted.The low-level driver will deal with the flag, or return an error,
if encrypted bitstreams are not supported.Signed-off-by: Moritz Fischer
Acked-by: Michal Simek
Signed-off-by: Alan Tull
Signed-off-by: Greg Kroah-Hartman
10 Feb, 2017
1 commit
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Requiring contiguous kernel memory is not a good idea, this is a limited
resource and allocation can fail under normal work loads.This introduces a .write_sg op that supporting drivers can provide
to DMA directly from dis-contiguous memory and a new entry point
fpga_mgr_buf_load_sg that users can call to directly provide page
lists.The full matrix of compatibility is provided, either the linear or sg
interface can be used by the user with a driver supporting either
interface.A notable change for drivers is that the .write op can now be called
multiple times.Signed-off-by: Jason Gunthorpe
Acked-by: Alan Tull
Acked-by: Moritz Fischer
Signed-off-by: Greg Kroah-Hartman
30 Nov, 2016
1 commit
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This interface was designed for streaming, but write_init's buf
argument has an unclear purpose. Define it to be the first bytes
of the bitstream. Each driver gets to set how many bytes (at most)
it wants to see. Short bitstreams will be passed through as-is, while
long ones will be truncated.The intent is to allow drivers to peek at the header before the transfer
actually starts.Signed-off-by: Jason Gunthorpe
Acked-by: Alan Tull
11 Nov, 2016
4 commits
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FPGA Regions support programming FPGA under control of the Device
Tree.Signed-off-by: Alan Tull
Signed-off-by: Greg Kroah-Hartman -
This framework adds API functions for enabling/
disabling FPGA bridges under kernel control.This allows the Linux kernel to disable FPGA bridges
during FPGA reprogramming and to enable FPGA bridges
when FPGA reprogramming is done. This framework is
be manufacturer-agnostic, allowing it to be used in
interfaces that use the FPGA Manager Framework to
reprogram FPGA's.The functions are:
* of_fpga_bridge_get
* fpga_bridge_put
Get/put an exclusive reference to a FPGA bridge.* fpga_bridge_enable
* fpga_bridge_disable
Enable/Disable traffic through a bridge.* fpga_bridge_register
* fpga_bridge_unregister
Register/unregister a device-specific low level FPGA
Bridge driver.Get an exclusive reference to a bridge and add it to a list:
* fpga_bridge_get_to_listTo enable/disable/put a set of bridges that are on a list:
* fpga_bridges_enable
* fpga_bridges_disable
* fpga_bridges_putSigned-off-by: Alan Tull
Signed-off-by: Greg Kroah-Hartman -
This patch adds a minor change in the FPGA Manager API
to hold information that is specific to an FPGA image
file. This change is expected to bring little, if any,
pain. The socfpga and zynq drivers are fixed up in
this patch.An FPGA image file will have particulars that affect how the
image is programmed to the FPGA. One example is that
current 'flags' currently has one bit which shows whether the
FPGA image was built for full reconfiguration or partial
reconfiguration. Another example is timeout values for
enabling or disabling the bridges in the FPGA. As the
complexity of the FPGA design increases, the bridges in the
FPGA may take longer times to enable or disable.This patch adds a new 'struct fpga_image_info', moves the
current 'u32 flags' to it. Two other image-specific u32's
are added for the bridge enable/disable timeouts. The FPGA
Manager API functions are changed, replacing the 'u32 flag'
parameter with a pointer to struct fpga_image_info.
Subsequent patches fix the existing low level FPGA manager
drivers.Signed-off-by: Alan Tull
Acked-by: Moritz Fischer
Signed-off-by: Greg Kroah-Hartman -
The intent is to provide a non-DT method of getting
ahold of a FPGA manager to do some FPGA programming.This patch refactors of_fpga_mgr_get() to reuse most of it
while adding a new method fpga_mgr_get() for getting a
pointer to a fpga manager struct, given the device.Signed-off-by: Alan Tull
Signed-off-by: Greg Kroah-Hartman
08 Oct, 2015
1 commit
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API to support programming FPGA's.
The following functions are exported as GPL:
* fpga_mgr_buf_load
Load fpga from image in buffer* fpga_mgr_firmware_load
Request firmware and load it to the FPGA.* fpga_mgr_register
* fpga_mgr_unregister
FPGA device drivers can be added by calling
fpga_mgr_register() to register a set of
fpga_manager_ops to do device specific stuff.* of_fpga_mgr_get
* fpga_mgr_put
Get/put a reference to a fpga manager.The following sysfs files are created:
* /sys/class/fpga_manager//name
Name of low level driver.* /sys/class/fpga_manager//state
State of fpga managerSigned-off-by: Alan Tull
Acked-by: Michal Simek
Signed-off-by: Greg Kroah-Hartman