Define a full set of tests similar to regular MR tests. Add a utility function to generate access flags for dma-buf based MRs because the set of supported flags is smaller.
Signed-off-by: Jianxin Xiong jianxin.xiong@intel.com --- tests/test_mr.py | 130 ++++++++++++++++++++++++++++++++++++++++++++++++++++++- tests/utils.py | 25 +++++++++++ 2 files changed, 154 insertions(+), 1 deletion(-)
diff --git a/tests/test_mr.py b/tests/test_mr.py index adc649c..8d7f002 100644 --- a/tests/test_mr.py +++ b/tests/test_mr.py @@ -9,9 +9,10 @@ import errno
from tests.base import PyverbsAPITestCase, RCResources, RDMATestCase from pyverbs.pyverbs_error import PyverbsRDMAError, PyverbsError -from pyverbs.mr import MR, MW, DMMR, MWBindInfo, MWBind +from pyverbs.mr import MR, MW, DMMR, DmaBufMR, MWBindInfo, MWBind from pyverbs.qp import QPCap, QPInitAttr, QPAttr, QP from pyverbs.wr import SendWR +from pyverbs.dmabuf import DmaBuf import pyverbs.device as d from pyverbs.pd import PD import pyverbs.enums as e @@ -366,3 +367,130 @@ class DMMRTest(PyverbsAPITestCase): dm_mr = DMMR(pd, dm_mr_len, e.IBV_ACCESS_ZERO_BASED, dm=dm, offset=dm_mr_offset) dm_mr.close() + +class DmaBufMRTest(PyverbsAPITestCase): + """ + Test various functionalities of the DmaBufMR class. + """ + def test_dmabuf_reg_mr(self): + """ + Test ibv_reg_dmabuf_mr() + """ + for ctx, attr, attr_ex in self.devices: + with PD(ctx) as pd: + flags = u.get_dmabuf_access_flags(ctx) + for f in flags: + len = u.get_mr_length() + off = random.randint(0, len//2) + with DmaBufMR(pd, len, f, offset=off) as mr: + pass + + def test_dmabuf_dereg_mr(self): + """ + Test ibv_dereg_mr() with DmaBufMR + """ + for ctx, attr, attr_ex in self.devices: + with PD(ctx) as pd: + flags = u.get_dmabuf_access_flags(ctx) + for f in flags: + len = u.get_mr_length() + off = random.randint(0, len//2) + with DmaBufMR(pd, len, f, offset=off) as mr: + mr.close() + + def test_dmabuf_dereg_mr_twice(self): + """ + Verify that explicit call to DmaBufMR's close() doesn't fail + """ + for ctx, attr, attr_ex in self.devices: + with PD(ctx) as pd: + flags = u.get_dmabuf_access_flags(ctx) + for f in flags: + len = u.get_mr_length() + off = random.randint(0, len//2) + with DmaBufMR(pd, len, f, offset=off) as mr: + # Pyverbs supports multiple destruction of objects, + # we are not expecting an exception here. + mr.close() + mr.close() + + def test_dmabuf_reg_mr_bad_flags(self): + """ + Verify that illegal flags combination fails as expected + """ + for ctx, attr, attr_ex in self.devices: + with PD(ctx) as pd: + for i in range(5): + flags = random.sample([e.IBV_ACCESS_REMOTE_WRITE, + e.IBV_ACCESS_REMOTE_ATOMIC], + random.randint(1, 2)) + mr_flags = 0 + for i in flags: + mr_flags += i.value + try: + DmaBufMR(pd, u.get_mr_length(), mr_flags) + except PyverbsRDMAError as err: + assert 'Failed to register a dma-buf MR' in err.args[0] + else: + raise PyverbsRDMAError('Registered a dma-buf MR with illegal falgs') + + def test_dmabuf_write(self): + """ + Test writing to DmaBufMR's buffer + """ + for ctx, attr, attr_ex in self.devices: + with PD(ctx) as pd: + for i in range(10): + mr_len = u.get_mr_length() + mr_off = random.randint(0, mr_len//2) + flags = u.get_dmabuf_access_flags(ctx) + for f in flags: + with DmaBufMR(pd, mr_len, f, offset=mr_off) as mr: + write_len = min(random.randint(1, MAX_IO_LEN), + mr_len) + mr.write('a' * write_len, write_len) + + def test_dmabuf_read(self): + """ + Test reading from DmaBufMR's buffer + """ + for ctx, attr, attr_ex in self.devices: + with PD(ctx) as pd: + for i in range(10): + mr_len = u.get_mr_length() + mr_off = random.randint(0, mr_len//2) + flags = u.get_dmabuf_access_flags(ctx) + for f in flags: + with DmaBufMR(pd, mr_len, f, offset=mr_off) as mr: + write_len = min(random.randint(1, MAX_IO_LEN), + mr_len) + write_str = 'a' * write_len + mr.write(write_str, write_len) + read_len = random.randint(1, write_len) + offset = random.randint(0, write_len-read_len) + read_str = mr.read(read_len, offset).decode() + assert read_str in write_str + + def test_dmabuf_lkey(self): + """ + Test reading lkey property + """ + for ctx, attr, attr_ex in self.devices: + with PD(ctx) as pd: + length = u.get_mr_length() + flags = u.get_dmabuf_access_flags(ctx) + for f in flags: + with DmaBufMR(pd, length, f) as mr: + mr.lkey + + def test_dmabuf_rkey(self): + """ + Test reading rkey property + """ + for ctx, attr, attr_ex in self.devices: + with PD(ctx) as pd: + length = u.get_mr_length() + flags = u.get_dmabuf_access_flags(ctx) + for f in flags: + with DmaBufMR(pd, length, f) as mr: + mr.rkey diff --git a/tests/utils.py b/tests/utils.py index 7039f41..0ad7110 100644 --- a/tests/utils.py +++ b/tests/utils.py @@ -94,6 +94,31 @@ def get_access_flags(ctx): return arr
+def get_dmabuf_access_flags(ctx): + """ + Similar to get_access_flags, except that dma-buf MR only support + a subset of the flags. + :param ctx: Device Context to check capabilities + :return: A random legal value for MR flags + """ + attr = ctx.query_device() + vals = [e.IBV_ACCESS_LOCAL_WRITE, e.IBV_ACCESS_REMOTE_WRITE, + e.IBV_ACCESS_REMOTE_READ, e.IBV_ACCESS_REMOTE_ATOMIC, + e.IBV_ACCESS_RELAXED_ORDERING] + if not attr.atomic_caps & e.IBV_ATOMIC_HCA: + vals.remove(e.IBV_ACCESS_REMOTE_ATOMIC) + arr = [] + for i in range(1, len(vals)): + tmp = list(com(vals, i)) + tmp = filter(filter_illegal_access_flags, tmp) + for t in tmp: # Iterate legal combinations and bitwise OR them + val = 0 + for flag in t: + val += flag.value + arr.append(val) + return arr + + def get_dm_attrs(dm_len): """ Initializes an AllocDmAttr member with the given length and random