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![]() Rationale: Reduces attack surface on kernel devs opening the links for MITM as HTTPS traffic is much harder to manipulate. Deterministic algorithm: For each file: If not .svg: For each line: If doesn't contain `\bxmlns\b`: For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`: If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`: If both the HTTP and HTTPS versions return 200 OK and serve the same content: Replace HTTP with HTTPS. Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de> Link: https://lore.kernel.org/r/20200719123244.58718-1-grandmaster@al2klimov.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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gs_fpgaboot.c | ||
gs_fpgaboot.h | ||
io.c | ||
io.h | ||
Kconfig | ||
Makefile | ||
README | ||
TODO |
============================================================================== Linux Driver Source for Xilinx FPGA firmware download ============================================================================== TABLE OF CONTENTS. 1. SUMMARY 2. BACKGROUND 3. DESIGN 4. HOW TO USE 5. REFERENCE 1. SUMMARY - Download Xilinx FPGA firmware - This module downloads Xilinx FPGA firmware using gpio pins. 2. BACKGROUND An FPGA (Field Programmable Gate Array) is a programmable hardware that is used in various applications. Hardware design needs to programmed through a dedicated device or CPU assisted way (serial or parallel). This driver provides a way to download FPGA firmware. 3. DESIGN - load Xilinx FPGA bitstream format[1] firmware image file using kernel firmware framework, request_firmware() - program the Xilinx FPGA using SelectMAP (parallel) mode [2] - FPGA prgram is done by gpio based bit-banging, as an example - platform independent file: gs_fpgaboot.c - platform dependent file: io.c 4. HOW TO USE $ insmod gs_fpga.ko file="xlinx_fpga_top_bitstream.bit" $ rmmod gs_fpga 5. USE CASE (from a mailing list discussion with Greg) a. As a FPGA development support tool, During FPGA firmware development, you need to download a new FPGA image frequently. You would do that with a dedicated JTAG, which usually a limited resource in the lab. However, if you use my driver, you don't have to have a dedicated JTAG. This is a real gain :) b. For the FPGA that runs without config after the download, which doesn't talk to any of Linux interfaces (such as PCIE). We download FPGA firmware from user triggered or some other way, and that's it. Since that FPGA runs on its own, it doesn't require a linux driver after the download. c. For the FPGA that requires config after the download, which talk to any of linux interfaces (such as PCIE) Then, this type of FPGA config can be put into device tree and have a separate driver (pcie or others), then THAT driver calls my driver to download FPGA firmware during the Linux boot, the take over the device through the interface. 6. REFERENCE 1. Xilinx APP NOTE XAPP583: https://www.xilinx.com/support/documentation/application_notes/xapp583-fpga-configuration.pdf 2. bitstream file info: http://home.earthlink.net/~davesullins/software/bitinfo.html