diff options
| author | Vincent Whitchurch <vincent.whitchurch@axis.com> | 2022-09-16 14:39:48 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-09-19 17:44:19 +0300 |
| commit | b85ad8a54e0a446b3daa7f526e4996ddb6d4373f (patch) | |
| tree | c32716b46a38be47b3ed776804c0eca3a87cad3e /drivers/spi | |
| parent | f4ca8c88c2c7ea3ea17c6fdfcc1af4b007403833 (diff) | |
| download | linux-b85ad8a54e0a446b3daa7f526e4996ddb6d4373f.tar.xz | |
spi: spi-loopback-test: Add test to trigger DMA/PIO mixing
Add a test where a small and a large transfer in a message hit the same
cache line. This test currently fails on spi-s3c64xx on in DMA mode
since it ends up mixing DMA and PIO without proper cache maintenance.
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Link: https://lore.kernel.org/r/20220916113951.228398-2-vincent.whitchurch@axis.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-loopback-test.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/spi/spi-loopback-test.c b/drivers/spi/spi-loopback-test.c index 4d4f77a186a9..dd7de8fa37d0 100644 --- a/drivers/spi/spi-loopback-test.c +++ b/drivers/spi/spi-loopback-test.c @@ -313,6 +313,33 @@ static struct spi_test spi_tests[] = { }, }, }, + { + .description = "three tx+rx transfers with overlapping cache lines", + .fill_option = FILL_COUNT_8, + /* + * This should be large enough for the controller driver to + * choose to transfer it with DMA. + */ + .iterate_len = { 512, -1 }, + .iterate_transfer_mask = BIT(1), + .transfer_count = 3, + .transfers = { + { + .len = 1, + .tx_buf = TX(0), + .rx_buf = RX(0), + }, + { + .tx_buf = TX(1), + .rx_buf = RX(1), + }, + { + .len = 1, + .tx_buf = TX(513), + .rx_buf = RX(513), + }, + }, + }, { /* end of tests sequence */ } }; |