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The NPU cores have their own access to the memory bus, and this isn't cache coherent with the CPUs. Add IOCTLs so userspace can mark when the caches need to be flushed, and also when a writer job needs to be waited for before the buffer can be accessed from the CPU. Initially based on the same IOCTLs from the Etnaviv driver. v2: - Don't break UABI by reordering the IOCTL IDs (Jeff Hugo) v3: - Check that padding fields in IOCTLs are zero (Jeff Hugo) v6: - Fix conversion logic to make sure we use DMA_BIDIRECTIONAL when needed (Lucas Stach) v8: - Always sync BOs in both directions (Robin Murphy) Reviewed-by: Jeff Hugo <jeff.hugo@oss.qualcomm.com> Tested-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Tomeu Vizoso <tomeu@tomeuvizoso.net> Signed-off-by: Jeff Hugo <jeff.hugo@oss.qualcomm.com> Link: https://lore.kernel.org/r/20250721-6-10-rocket-v9-5-77ebd484941e@tomeuvizoso.net |
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .clippy.toml | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .pylintrc | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.