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* [PATCH v2 0/3] firmware: zynqmp-fpga: fix fpga loading with optimized string functions
@ 2021-08-19  8:12 Michael Tretter
  2021-08-19  8:12 ` [PATCH v2 1/3] firmware: zynqmp-fpga: initialize flags at function start Michael Tretter
                   ` (3 more replies)
  0 siblings, 4 replies; 5+ messages in thread
From: Michael Tretter @ 2021-08-19  8:12 UTC (permalink / raw)
  To: barebox; +Cc: lst

If CONFIG_ARM_OPTIMZED_STRING_FUNCTIONS is enabled, loading the FPGA fails
with an abort, because the optimized memcpy can only be used on cached memory.
As the bitstream can be several MBs large, we want to use the optimized
functions. Fix the abort by using a cached mapping with streaming DMA.

v2 drops the explicit dma_sync_single_for_device and instead uses
dma_map_single to flush the temporary buffer. I also fixed the error handling
in case the mapping fails and made the size of the extra space at the end of
the temporary buffer more explicit.

Michael

Changelog:

Michael Tretter (3):
  firmware: zynqmp-fpga: initialize flags at function start
  firmware: zynqmp-fpga: avoid additional buffer for size argument
  firmware: zynqmp-fpga: do not use DMA coherent memory for bitstream

 drivers/firmware/zynqmp-fpga.c | 55 +++++++++++++++++-----------------
 1 file changed, 27 insertions(+), 28 deletions(-)

-- 
2.30.2


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^ permalink raw reply	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2021-08-23 13:53 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-08-19  8:12 [PATCH v2 0/3] firmware: zynqmp-fpga: fix fpga loading with optimized string functions Michael Tretter
2021-08-19  8:12 ` [PATCH v2 1/3] firmware: zynqmp-fpga: initialize flags at function start Michael Tretter
2021-08-19  8:12 ` [PATCH v2 2/3] firmware: zynqmp-fpga: avoid additional buffer for size argument Michael Tretter
2021-08-19  8:12 ` [PATCH v2 3/3] firmware: zynqmp-fpga: do not use DMA coherent memory for bitstream Michael Tretter
2021-08-23 13:51 ` [PATCH v2 0/3] firmware: zynqmp-fpga: fix fpga loading with optimized string functions Sascha Hauer

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