[RFC 0/2] Add streaming API for firmware and FPGA manager

From	yi1.li@linux.intel.com
Newsgroups	linux.kernel
Subject	[RFC 0/2] Add streaming API for firmware and FPGA manager
Date	2017-03-10 01:30 +0100
Message-ID	<tjgBr-4eD-3@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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From: Yi Li <yi1.li@linux.intel.com>

As the FPGA hardware advances, the firmware image size grows (hundres
of MBs or more). It could be an issue for kernel to allocate a big
buffer to load the whole firmware file.
Here is an attempt to read the firmware file into a small buffer and
program the FPGA in a loop (or so call the streaming mode). It should not
be a performance hit for FPGA programing since the majority of time
spend is with the FPGA CvP/PR-IP interface. 

pseudo code in fpga manager:
while (size > 0) {
	ret = stream_firmware(&fw, image_name, dev, offset, streamsize);
	ret = mgr->mops->write(mgr, fw->data, fw->size);
	offset += fw->size;
	size -= fw->size;
}

Thanks,
Yi

Yi Li (2):
  firmware class: Add stream_firmware API.
  fpga manager: Add fpga_mgr_firmware_stream API

 drivers/base/firmware_class.c | 128 ++++++++++++++++++++++++++++++++++++++++++
 drivers/fpga/fpga-mgr.c       |  77 +++++++++++++++++++++++++
 include/linux/firmware.h      |   2 +
 include/linux/fpga/fpga-mgr.h |   4 ++
 4 files changed, 211 insertions(+)

-- 
2.7.4

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[RFC 0/2] Add streaming API for firmware and FPGA manager  yi1.li@linux.intel.com - 2017-03-10 01:30 +0100
  [RFC 2/2] fpga manager: Add fpga_mgr_firmware_stream API yi1.li@linux.intel.com - 2017-03-10 01:30 +0100
    Re: [RFC 2/2] fpga manager: Add fpga_mgr_firmware_stream API Alan Tull <delicious.quinoa@gmail.com> - 2017-03-13 19:10 +0100
      Re: [RFC 2/2] fpga manager: Add fpga_mgr_firmware_stream API "Li, Yi" <yi1.li@linux.intel.com> - 2017-03-13 20:10 +0100
  [RFC 1/2] firmware class: Add stream_firmware API. yi1.li@linux.intel.com - 2017-03-10 01:30 +0100
    Re: [RFC 1/2] firmware class: Add stream_firmware API. matthew.gerlach@linux.intel.com - 2017-03-10 18:50 +0100
      Re: [RFC 1/2] firmware class: Add stream_firmware API. "Li, Yi" <yi1.li@linux.intel.com> - 2017-03-10 20:30 +0100
        Re: [RFC 1/2] firmware class: Add stream_firmware API. matthew.gerlach@linux.intel.com - 2017-03-13 22:10 +0100
  Re: [RFC 0/2] Add streaming API for firmware and FPGA manager  matthew.gerlach@linux.intel.com - 2017-03-10 18:20 +0100

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