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As a first step to have a clearer separation of the different parts of
the kernel driver, the source files have been placed into separate
directories according to their purpose and the different parts are only
allowed to use headers from another part in the include folder.
Files have been renamed accordingly to namespace them by their purpose.
Change-Id: I75e09ebf0002c99a22b6d4b09d34504d186c32b3
Signed-off-by: Mikael Olsson <mikael.olsson@arm.com>
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To allow the NPU kernel driver to allocate and use DMA memory internally
without creating a buffer instance, the DMA memory management has been
split out from the buffer code.
Change-Id: I46fdeee51b5ef786a54b8e7c866d137d91222724
Signed-off-by: Mikael Olsson <mikael.olsson@arm.com>
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The UAPI no longer supports the buffer capacity, offset and resize
functionality. Instead, the UAPI now only accepts a fixed size given at
the creation of the buffer. This change was made because the features
were not used and made the buffer handling more complicated. The user
knows how big buffers they need for their networks so they don't need
resize support or partial buffer usage support by having separate size
and capacity with an offset.
Without these features, the buffer instance no longer needs any IOCTL
call support so it has been removed. However, to still be able to check
the size of a buffer from its file descriptor, seek support has been
implemented so lseek and similar functions can be used to get the size.
The driver library's clear function that previously only reset the size
and offset values of the buffer will now clear the buffer content
instead.
These are breaking changes so the Linux kernel NPU driver version and
the driver library version have been given major version bumps. All the
tests and other applications affected by these changes have been updated
accordingly.
Change-Id: Ifc34cf04724a95853ad23fd7398dd286f73bcdab
Signed-off-by: Mikael Olsson <mikael.olsson@arm.com>
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Changed several logs level from info to dbg and removed redundant or
uninformative logging in order to reduce verbosity of the kernel
modules.
Change-Id: Ie9ff7f3ae6478007ea58547380b3ddfef5d280b4
Signed-off-by: Ledion Daja <ledion.daja@arm.com>
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To not leak any information from kernel space when IOCTL calls copy data
from kernel space to user space, the source struct in the IOCTL calls is
now initialized.
Change-Id: I0825e82ccdb51ced747e160dd7385fa1ed227eaf
Signed-off-by: Mikael Olsson <mikael.olsson@arm.com>
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In some cases, the IOCTL functions didn't update the return value
variable so the wrong value was returned from the IOCTL calls.
Change-Id: I56529f8fb03cec52dbc555d5ed3d4e68e4bfab70
Signed-off-by: Mikael Olsson <mikael.olsson@arm.com>
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To not leave behind any data in memory from buffers, inferences and
networks, the memory allocated for them is now cleared before it is
freed.
Change-Id: I68c221b190e78f9b4c5022016c38f4ced5e78166
Signed-off-by: Mikael Olsson <mikael.olsson@arm.com>
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When the Ethos-U kernel driver is probed it creates a /dev/ethosu<nr>
device node, which user space use ioctl to communicate with. When
the driver is removed the Ethos-U resources must live on until all
open file handles have been closed.
The rpmsg device can be removed for a number of reasons, for example
if the firmware is stopped or the remoteproc driver is removed. To
allow the remove to complete without waiting for all file handles to
close, a new 'struct device' is created by the kernel driver. This
device will be used to memory allocations and will live on until the
last file handle has been closed.
Change-Id: I790d8219960f25fe64f58c11a865eb65c7b08974
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The 'struct ethosu_device' has been passed as argument to classes.
This creates a circular dependency dependency and it gives all
classes full visibility to all resources in the device struct. This
patch removes the circular dependency.
Using device_lock() and device_unlock() to for synchronization.
Change-Id: I8322e6530c72d7bd67f48f411b4f14b612be2706
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The Ethos-U kernel driver has been converted from a
platform driver with a custom firmware interface into a
rpmsg driver.
Change-Id: I9ae449f5e79eb02924e6630611d0893e5fec86be
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Add logging class for driver library. Log severity can be configured
using an environment variable.
Add information to prints in kernel space.
Change-Id: I19a1078869733746726515a6cafb79110314066d
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Avoid undefined behaviour from calling dma_alloc_coherent with
requested size=0 as reported by UBSAN.
Change-Id: I1732759464f1d88259edeea099b1729f4ae6b86f
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Add UAPI and core message that allows user space space to fetch
information about network models built into the firmware.
Change-Id: Ic92529bce3edd0a5499e691a566bd065da2a72ad
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Change-Id: I1ad92264eb5dae672faf3f5b08a6f987148f629e
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Change-Id: I14b6becc908a0ac215769c32ee9c43db192ae6c8
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