From: fisaksen@baylibre.com (Frode Isaksen)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 0/6] Enable DMA for daVinci SPI controller
Date: Thu, 23 Feb 2017 19:01:55 +0100 [thread overview]
Message-ID: <1487872921-26628-1-git-send-email-fisaksen@baylibre.com> (raw)
Enable DMA for the daVinci SPI using the SPI framework DMA mapping
function.
Add fixes caused by large number of SG entries.
Do not allow vmalloc'ed buffers for DMA.
Also, add some extra options to the spi-loopback-test
module to catch errors caused by many SG entries
and VIVT cache.
This has been tested using spidev_test, spi-loopback-test and
mounting and read/write UBIFS volume over SPI flash.
v2 changes:
- Use SPI_MASTER_MUST_ flag(s) for dummy buffer allocation (thanks
Mark Brown).
- For rx-only transfers, use rx buffer as dummy tx buffer to avoid
errors with more than 20 SG entries.
- Improved comments and use #define for contants.
- Abandon patches to set loopback and limit transfer size in
spi-loopback-test.
v3 changes:
- Disable DMA for vmalloc'ed buffers.
- Reworked 'can_dma' function.
- Add option to skip a check in spi-loopback-test to catch VIVT
cache errors.
Thanks,
Frode
next reply other threads:[~2017-02-23 18:01 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-23 18:01 Frode Isaksen [this message]
2017-02-23 18:01 ` [PATCH v3 1/6] spi: davinci: Use SPI framework to handle DMA mapping Frode Isaksen
2017-03-07 14:22 ` Applied "spi: davinci: Use SPI framework to handle DMA mapping" to the spi tree Mark Brown
2017-02-23 18:01 ` [PATCH v3 2/6] spi: davinci: enable DMA when channels are defined in DT Frode Isaksen
2017-02-23 18:01 ` [PATCH v3 3/6] spi: davinci: use rx buffer as dummy tx buffer Frode Isaksen
2017-03-15 19:35 ` Mark Brown
2017-02-23 18:01 ` [PATCH v3 4/6] spi: davinci: do not use DMA if transfer length is less than 16 Frode Isaksen
2017-03-15 19:37 ` Applied "spi: davinci: do not use DMA if transfer length is less than 16" to the spi tree Mark Brown
2017-02-23 18:02 ` [PATCH v3 5/6] spi: davinci: do not use DMA for vmalloc'ed buffers Frode Isaksen
2017-03-15 19:37 ` Applied "spi: davinci: do not use DMA for vmalloc'ed buffers" to the spi tree Mark Brown
2017-02-23 18:02 ` [PATCH v3 6/6] spi: loopback-test: add option to use vmalloc'ed buffers Frode Isaksen
2017-03-16 14:11 ` Applied "spi: loopback-test: add option to use vmalloc'ed buffers" to the spi tree Mark Brown
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