[PATCH rdma-core v6 5/6] tests: Add tests for dma-buf based memory regions
Jianxin Xiong
jianxin.xiong at intel.com
Thu Jan 21 00:14:37 UTC 2021
Define a set of unit tests similar to regular MR tests and a set of
tests for send/recv and rdma traffic using dma-buf MRs. 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 at intel.com>
---
tests/args_parser.py | 4 +
tests/test_mr.py | 264 ++++++++++++++++++++++++++++++++++++++++++++++++++-
tests/utils.py | 26 +++++
3 files changed, 293 insertions(+), 1 deletion(-)
diff --git a/tests/args_parser.py b/tests/args_parser.py
index 446535a..5bc53b0 100644
--- a/tests/args_parser.py
+++ b/tests/args_parser.py
@@ -19,6 +19,10 @@ class ArgsParser(object):
parser.add_argument('--port',
help='Use port <port> of RDMA device', type=int,
default=1)
+ parser.add_argument('--gpu', nargs='?', type=int, const=0, default=0,
+ help='GPU unit to allocate dmabuf from')
+ parser.add_argument('--gtt', action='store_true', default=False,
+ help='Allocate dmabuf from GTT instead of VRAM')
parser.add_argument('-v', '--verbose', dest='verbosity',
action='store_const',
const=2, help='Verbose output')
diff --git a/tests/test_mr.py b/tests/test_mr.py
index adc649c..6915853 100644
--- a/tests/test_mr.py
+++ b/tests/test_mr.py
@@ -1,5 +1,6 @@
# SPDX-License-Identifier: (GPL-2.0 OR Linux-OpenIB)
# Copyright (c) 2019 Mellanox Technologies, Inc. All rights reserved. See COPYING file
+# Copyright (c) 2020 Intel Corporation. All rights reserved. See COPYING file
"""
Test module for pyverbs' mr module.
"""
@@ -9,9 +10,10 @@ 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 +368,263 @@ class DMMRTest(PyverbsAPITestCase):
dm_mr = DMMR(pd, dm_mr_len, e.IBV_ACCESS_ZERO_BASED,
dm=dm, offset=dm_mr_offset)
dm_mr.close()
+
+
+def check_dmabuf_support(unit=0):
+ """
+ Check if dma-buf allocation is supported by the system.
+ Skip the test on failure.
+ """
+ device_num = 128 + unit
+ try:
+ DmaBuf(1, unit=unit)
+ except PyverbsRDMAError as ex:
+ if ex.error_code == errno.ENOENT:
+ raise unittest.SkipTest(f'Device /dev/dri/renderD{device_num} is not present')
+ if ex.error_code == errno.EACCES:
+ raise unittest.SkipTest(f'Lack of permission to access /dev/dri/renderD{device_num}')
+ if ex.error_code == errno.EOPNOTSUPP:
+ raise unittest.SkipTest(f'Allocating dmabuf is not supported by /dev/dri/renderD{device_num}')
+
+
+def check_dmabuf_mr_support(pd, unit=0):
+ """
+ Check if dma-buf MR registration is supported by the driver.
+ Skip the test on failure
+ """
+ try:
+ DmaBufMR(pd, 1, 0, unit=unit)
+ except PyverbsRDMAError as ex:
+ if ex.error_code == errno.EOPNOTSUPP:
+ raise unittest.SkipTest('Reg dma-buf MR is not supported by the RDMA driver')
+
+
+class DmaBufMRTest(PyverbsAPITestCase):
+ """
+ Test various functionalities of the DmaBufMR class.
+ """
+ def setUp(self):
+ super().setUp()
+ self.unit = self.config['gpu']
+ self.gtt = self.config['gtt']
+
+ def test_dmabuf_reg_mr(self):
+ """
+ Test ibv_reg_dmabuf_mr()
+ """
+ check_dmabuf_support(self.unit)
+ for ctx, attr, attr_ex in self.devices:
+ with PD(ctx) as pd:
+ check_dmabuf_mr_support(pd, self.unit)
+ flags = u.get_dmabuf_access_flags(ctx)
+ for f in flags:
+ len = u.get_mr_length()
+ for off in [0, len//2]:
+ with DmaBufMR(pd, len, f, offset=off, unit=self.unit,
+ gtt=self.gtt) as mr:
+ pass
+
+ def test_dmabuf_dereg_mr(self):
+ """
+ Test ibv_dereg_mr() with DmaBufMR
+ """
+ check_dmabuf_support(self.unit)
+ for ctx, attr, attr_ex in self.devices:
+ with PD(ctx) as pd:
+ check_dmabuf_mr_support(pd, self.unit)
+ flags = u.get_dmabuf_access_flags(ctx)
+ for f in flags:
+ len = u.get_mr_length()
+ for off in [0, len//2]:
+ with DmaBufMR(pd, len, f, offset=off, unit=self.unit,
+ gtt=self.gtt) as mr:
+ mr.close()
+
+ def test_dmabuf_dereg_mr_twice(self):
+ """
+ Verify that explicit call to DmaBufMR's close() doesn't fail
+ """
+ check_dmabuf_support(self.unit)
+ for ctx, attr, attr_ex in self.devices:
+ with PD(ctx) as pd:
+ check_dmabuf_mr_support(pd, self.unit)
+ flags = u.get_dmabuf_access_flags(ctx)
+ for f in flags:
+ len = u.get_mr_length()
+ for off in [0, len//2]:
+ with DmaBufMR(pd, len, f, offset=off, unit=self.unit,
+ gtt=self.gtt) 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
+ """
+ check_dmabuf_support(self.unit)
+ for ctx, attr, attr_ex in self.devices:
+ with PD(ctx) as pd:
+ check_dmabuf_mr_support(pd, self.unit)
+ 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,
+ unit=self.unit, gtt=self.gtt)
+ 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
+ """
+ check_dmabuf_support(self.unit)
+ for ctx, attr, attr_ex in self.devices:
+ with PD(ctx) as pd:
+ check_dmabuf_mr_support(pd, self.unit)
+ for i in range(10):
+ mr_len = u.get_mr_length()
+ flags = u.get_dmabuf_access_flags(ctx)
+ for f in flags:
+ for mr_off in [0, mr_len//2]:
+ with DmaBufMR(pd, mr_len, f, offset=mr_off,
+ unit=self.unit, gtt=self.gtt) 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
+ """
+ check_dmabuf_support(self.unit)
+ for ctx, attr, attr_ex in self.devices:
+ with PD(ctx) as pd:
+ check_dmabuf_mr_support(pd, self.unit)
+ for i in range(10):
+ mr_len = u.get_mr_length()
+ flags = u.get_dmabuf_access_flags(ctx)
+ for f in flags:
+ for mr_off in [0, mr_len//2]:
+ with DmaBufMR(pd, mr_len, f, offset=mr_off,
+ unit=self.unit, gtt=self.gtt) 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
+ """
+ check_dmabuf_support(self.unit)
+ for ctx, attr, attr_ex in self.devices:
+ with PD(ctx) as pd:
+ check_dmabuf_mr_support(pd, self.unit)
+ length = u.get_mr_length()
+ flags = u.get_dmabuf_access_flags(ctx)
+ for f in flags:
+ with DmaBufMR(pd, length, f, unit=self.unit,
+ gtt=self.gtt) as mr:
+ mr.lkey
+
+ def test_dmabuf_rkey(self):
+ """
+ Test reading rkey property
+ """
+ check_dmabuf_support(self.unit)
+ for ctx, attr, attr_ex in self.devices:
+ with PD(ctx) as pd:
+ check_dmabuf_mr_support(pd, self.unit)
+ length = u.get_mr_length()
+ flags = u.get_dmabuf_access_flags(ctx)
+ for f in flags:
+ with DmaBufMR(pd, length, f, unit=self.unit,
+ gtt=self.gtt) as mr:
+ mr.rkey
+
+
+class DmaBufRC(RCResources):
+ def __init__(self, dev_name, ib_port, gid_index, unit, gtt):
+ """
+ Initialize an DmaBufRC object.
+ :param dev_name: Device name to be used
+ :param ib_port: IB port of the device to use
+ :param gid_index: Which GID index to use
+ :param unit: GPU unit to allocate dmabuf from
+ :gtt: Allocate dmabuf from GTT instead og VRAM
+ """
+ self.unit = unit
+ self.gtt = gtt
+ super(DmaBufRC, self).__init__(dev_name=dev_name, ib_port=ib_port,
+ gid_index=gid_index)
+
+ def create_mr(self):
+ check_dmabuf_support(self.unit)
+ check_dmabuf_mr_support(self.pd, self.unit)
+ access = e.IBV_ACCESS_LOCAL_WRITE | e.IBV_ACCESS_REMOTE_WRITE
+ mr = DmaBufMR(self.pd, self.msg_size, access, unit=self.unit,
+ gtt=self.gtt)
+ self.mr = mr
+
+ def create_qp_attr(self):
+ qp_attr = QPAttr(port_num=self.ib_port)
+ qp_access = e.IBV_ACCESS_LOCAL_WRITE | e.IBV_ACCESS_REMOTE_WRITE
+ qp_attr.qp_access_flags = qp_access
+ return qp_attr
+
+
+class DmaBufTestCase(RDMATestCase):
+ def setUp(self):
+ super(DmaBufTestCase, self).setUp()
+ self.iters = 100
+ self.unit = self.config['gpu']
+ self.gtt = self.config['gtt']
+
+ def create_players(self, resource, **resource_arg):
+ """
+ Init dma-buf tests resources.
+ :param resource: The RDMA resources to use. A class of type
+ BaseResources.
+ :param resource_arg: Dict of args that specify the resource specific
+ attributes.
+ :return: The (client, server) resources.
+ """
+ client = resource(**self.dev_info, **resource_arg)
+ server = resource(**self.dev_info, **resource_arg)
+ client.pre_run(server.psns, server.qps_num)
+ server.pre_run(client.psns, client.qps_num)
+ return client, server
+
+ def test_dmabuf_rc_traffic(self):
+ """
+ Test send/recv using dma-buf MR over RC
+ """
+ client, server = self.create_players(DmaBufRC, unit=self.unit,
+ gtt=self.gtt)
+ u.traffic(client, server, self.iters, self.gid_index, self.ib_port)
+
+ def test_dmabuf_rdma_traffic(self):
+ """
+ Test rdma write using dma-buf MR
+ """
+ client, server = self.create_players(DmaBufRC, unit=self.unit,
+ gtt=self.gtt)
+ server.rkey = client.mr.rkey
+ server.remote_addr = client.mr.offset
+ client.rkey = server.mr.rkey
+ client.remote_addr = server.mr.offset
+ u.rdma_traffic(client, server, self.iters, self.gid_index, self.ib_port,
+ send_op=e.IBV_WR_RDMA_WRITE)
diff --git a/tests/utils.py b/tests/utils.py
index e2ab669..8546329 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -1,5 +1,6 @@
# SPDX-License-Identifier: (GPL-2.0 OR Linux-OpenIB)
# Copyright (c) 2019 Mellanox Technologies, Inc. All rights reserved. See COPYING file
+# Copyright (c) 2020 Intel Corporation. All rights reserved. See COPYING file
"""
Provide some useful helper function for pyverbs' tests.
"""
@@ -96,6 +97,31 @@ 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
--
1.8.3.1
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