def test_dm_bad_access(self):
"""
Test multiple types of bad access to the Device Memory. Device memory
access requests a 4B alignment. The test tries to access the DM
with bad alignment or outside of the allocated memory.
"""
ctx, _, _ = self.devices[0]
dm_size = 100
with d.DM(ctx, d.AllocDmAttr(length=dm_size)) as dm:
dm_access = e.IBV_ACCESS_ZERO_BASED | e.IBV_ACCESS_LOCAL_WRITE
dmmr = DMMR(PD(ctx), dm_size, dm_access, dm, 0)
access_cases = [
(DM_INVALID_ALIGNMENT,
4), # Valid length with unaligned offset
(4,
DM_INVALID_ALIGNMENT), # Valid offset with unaligned length
(dm_size + 4, 4), # Offset out of allocated memory
(0, dm_size + 4)
] # Length out of allocated memory
for case in access_cases:
offset, length = case
with self.assertRaisesRegex(PyverbsRDMAError,
'Failed to copy from dm'):
dmmr.read(offset=offset, length=length)
with self.assertRaisesRegex(PyverbsRDMAError,
'Failed to copy to dm'):
dmmr.write(data='s' * length, offset=offset, length=length)
def test_dm_bad_registration(self):
"""
Test bad Device Memory registration when trying to register bigger DMMR
than the allocated DM.
"""
dm_size = 100
with d.DM(self.ctx, d.AllocDmAttr(length=dm_size)) as dm:
dm_access = e.IBV_ACCESS_ZERO_BASED | e.IBV_ACCESS_LOCAL_WRITE
with self.assertRaisesRegex(PyverbsRDMAError, 'Failed to register a device MR'):
DMMR(PD(self.ctx), dm_size + 4, dm_access, dm, 0)
def test_create_dm_mr(self):
max_dm_size = self.attr_ex.max_dm_size
dm_access = e.IBV_ACCESS_ZERO_BASED | e.IBV_ACCESS_LOCAL_WRITE
for dm_size in [4, max_dm_size/4, max_dm_size/2]:
dm_size = dm_size - (dm_size % u.DM_ALIGNMENT)
for dmmr_factor_size in [0.1, 0.5, 1]:
dmmr_size = dm_size * dmmr_factor_size
dmmr_size = dmmr_size - (dmmr_size % u.DM_ALIGNMENT)
with d.DM(self.ctx, d.AllocDmAttr(length=dm_size)) as dm:
DMMR(PD(self.ctx), dmmr_size, dm_access, dm, 0)
def create_mr(self):
try:
self.dm = d.DM(self.ctx, d.AllocDmAttr(length=self.msg_size))
access = e.IBV_ACCESS_ZERO_BASED | e.IBV_ACCESS_LOCAL_WRITE
if self.remote_access:
access |= e.IBV_ACCESS_REMOTE_WRITE
self.mr = DMMR(self.pd, self.msg_size, access, self.dm, 0)
except PyverbsRDMAError as ex:
if ex.error_code == errno.EOPNOTSUPP:
raise unittest.SkipTest(f'Reg DMMR with access={access} is not supported')
raise ex
def test_create_dm_mr(self):
"""
Test ibv_reg_dm_mr
"""
for ctx, attr, attr_ex in self.devices:
if attr_ex.max_dm_size == 0:
return
with PD(ctx) as pd:
for i in range(10):
dm_len = random.randrange(u.MIN_DM_SIZE, attr_ex.max_dm_size,
u.DM_ALIGNMENT)
dm_attrs = u.get_dm_attrs(dm_len)
with d.DM(ctx, dm_attrs) as dm:
dm_mr_len = random.randint(1, dm_len)
dm_mr_offset = random.randint(0, (dm_len - dm_mr_len))
DMMR(pd, dm_mr_len, e.IBV_ACCESS_ZERO_BASED, dm=dm,
offset=dm_mr_offset)
def test_create_dm_mr(self):
"""
Test ibv_reg_dm_mr
"""
lst = d.get_device_list()
for dev in lst:
with d.Context(name=dev.name.decode()) as ctx:
attr = ctx.query_device_ex()
if attr.max_dm_size == 0:
return
with PD(ctx) as pd:
dm_len = random.randrange(u.MIN_DM_SIZE, attr.max_dm_size,
u.DM_ALIGNMENT)
dm_attrs = u.get_dm_attrs(dm_len)
with d.DM(ctx, dm_attrs) as dm:
dm_mr_len = random.randint(1, dm_len)
dm_mr_offset = random.randint(0, (dm_len - dm_mr_len))
dm_mr = DMMR(pd,
dm_mr_len,
e.IBV_ACCESS_ZERO_BASED,
dm=dm,
offset=dm_mr_offset)
def test_destroy_dm_mr(self):
"""
Test freeing of dm_mr
"""
for ctx, attr, attr_ex in self.devices:
if attr_ex.max_dm_size == 0:
raise unittest.SkipTest('Device memory is not supported')
with PD(ctx) as pd:
for i in range(10):
dm_len = random.randrange(u.MIN_DM_SIZE,
attr_ex.max_dm_size / 2,
u.DM_ALIGNMENT)
dm_attrs = u.get_dm_attrs(dm_len)
with d.DM(ctx, dm_attrs) as dm:
dm_mr_len = random.randint(1, dm_len)
dm_mr_offset = random.randint(0, (dm_len - dm_mr_len))
dm_mr = DMMR(pd,
dm_mr_len,
e.IBV_ACCESS_ZERO_BASED,
dm=dm,
offset=dm_mr_offset)
dm_mr.close()