Skip to content

S
Simple PCIe FMC carrier SPEC
Commit 54242b66 authored by Federico Vaga's avatar Federico Vaga
Browse files
Options

tst: dedicated test for invalid sizes 

Signed-off-by: Federico Vaga's avatarFederico Vaga <federico.vaga@cern.ch>
parent f7f92deb
Hide whitespace changes
Inline Side-by-side
Showing with 25 additions and 0 deletions
pytest/test_dma.py
View file @ 54242b66
......@@ -72,6 +72,31 @@ class TestDma(object):
spec.dma_stop()
@pytest.mark.parametrize("buffer_size", [1, 2, 3])
def test_dma_invalid_size_read(self, spec, buffer_size):
"""
The HDL engine masks the 2 least significant bits. For small transfers
this translates into a zero length transfer which is not supported.
Also 0 is an invalid size, but read/write returns immediatly because
there is nothing to transfer.
"""
spec.dma_start()
with pytest.raises(OSError) as error:
spec.dma_read(0, buffer_size)
spec.dma_stop()
@pytest.mark.parametrize("buffer_size", [1, 2, 3])
def test_dma_invalid_size_write(self, spec, buffer_size):
"""
The HDL engine masks the 2 least significant bits. For small transfers
this translates into a zero length transfer which is not supported.
"""
spec.dma_start()
with pytest.raises(OSError) as error:
spec.dma_write(0, b"\x00" * buffer_size)
spec.dma_stop()
@pytest.mark.parametrize("dma_offset", [0x0])
@pytest.mark.parametrize("dma_size",
[2**i for i in range(3, 22)])
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment