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Synopsys eDMA IP is normally distributed along with Synopsys PCIe EndPoint IP (depends of the use and licensing agreement). This IP requires some basic configurations, such as: - eDMA registers BAR - eDMA registers offset - eDMA registers size - eDMA linked list memory BAR - eDMA linked list memory offset - eDMA linked list memory size - eDMA data memory BAR - eDMA data memory offset - eDMA data memory size - eDMA version - eDMA mode - IRQs available for eDMA As a working example, PCIe glue-logic will attach to a Synopsys PCIe EndPoint IP prototype kit (Vendor ID = 0x16c3, Device ID = 0xedda), which has built-in an eDMA IP with this default configuration: - eDMA registers BAR = 0 - eDMA registers offset = 0x00001000 (4 Kbytes) - eDMA registers size = 0x00002000 (8 Kbytes) - eDMA linked list memory BAR = 2 - eDMA linked list memory offset = 0x00000000 (0 Kbytes) - eDMA linked list memory size = 0x00800000 (8 Mbytes) - eDMA data memory BAR = 2 - eDMA data memory offset = 0x00800000 (8 Mbytes) - eDMA data memory size = 0x03800000 (56 Mbytes) - eDMA version = 0 - eDMA mode = EDMA_MODE_UNROLL - IRQs = 1 This driver can be compile as built-in or external module in kernel. To enable this driver just select DW_EDMA_PCIE option in kernel configuration, however it requires and selects automatically DW_EDMA option too. Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Cc: Vinod Koul <vkoul@kernel.org> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Russell King <rmk+kernel@armlinux.org.uk> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Signed-off-by: Vinod Koul <vkoul@kernel.org> |
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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 Restructured Text 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.