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The API is not suitable for subsystems consisting of multiple devices and requires severe hacks to use it. To mitigate this, this patch implements allocation and address space management locally by using helpers provided by DRM framework, like other DRM drivers do, e.g. Tegra. This patch should not introduce any functional changes until the driver is made to attach subdevices into an IOMMU domain with the generic IOMMU API, which will happen in following patch. Based heavily on GEM implementation of Tegra DRM driver. Signed-off-by: Tomasz Figa <tfiga@chromium.org> Signed-off-by: Shunqian Zheng <zhengsq@rock-chips.com> Signed-off-by: Mark Yao <mark.yao@rock-chips.com> Signed-off-by: rjan Eide <orjan.eide@arm.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.