# SPDX-License-Identifier: (GPL-2.0 OR Linux-OpenIB) # Copyright (c) 2020 Nvidia, Inc. All rights reserved. See COPYING file import unittest import random import errno from pyverbs.providers.mlx5.mlx5dv import Mlx5Context, Mlx5DVContextAttr, \ Mlx5DVQPInitAttr, Mlx5QP from pyverbs.pyverbs_error import PyverbsRDMAError, PyverbsUserError, \ PyverbsError from pyverbs.providers.mlx5.mlx5dv_mkey import Mlx5Mkey, Mlx5MrInterleaved, \ Mlx5MkeyConfAttr, Mlx5SigT10Dif, Mlx5SigCrc, Mlx5SigBlockDomain, \ Mlx5SigBlockAttr from tests.base import RCResources, RDMATestCase import pyverbs.providers.mlx5.mlx5_enums as dve from pyverbs.wr import SGE, SendWR, RecvWR from pyverbs.qp import QPInitAttrEx, QPCap, QPAttr import pyverbs.enums as e import tests.utils as u class Mlx5MkeyResources(RCResources): def __init__(self, dev_name, ib_port, gid_index, dv_send_ops_flags=0, mkey_create_flags=dve.MLX5DV_MKEY_INIT_ATTR_FLAGS_INDIRECT, dv_qp_create_flags=dve.MLX5DV_QP_CREATE_DISABLE_SCATTER_TO_CQE): self.dv_send_ops_flags = dv_send_ops_flags self.mkey_create_flags = mkey_create_flags self.dv_qp_create_flags = dv_qp_create_flags if dv_send_ops_flags & dve.MLX5DV_QP_EX_WITH_MKEY_CONFIGURE: self.max_inline_data = 512 else: self.max_inline_data = 0 self.qp_access_flags = e.IBV_ACCESS_LOCAL_WRITE self.send_ops_flags = e.IBV_QP_EX_WITH_SEND # The signature pipelining tests use RDMA_WRITE. Allow RDMA_WRITE # if the pipelining flag is enabled for the QP. if self.dv_qp_create_flags & dve.MLX5DV_QP_CREATE_SIG_PIPELINING: self.qp_access_flags |= e.IBV_ACCESS_REMOTE_WRITE self.send_ops_flags |= e.IBV_QP_EX_WITH_RDMA_WRITE super().__init__(dev_name, ib_port, gid_index) self.create_mkey() def create_context(self): mlx5dv_attr = Mlx5DVContextAttr() try: self.ctx = Mlx5Context(mlx5dv_attr, name=self.dev_name) except PyverbsUserError as ex: raise unittest.SkipTest(f'Could not open mlx5 context ({ex})') except PyverbsRDMAError: raise unittest.SkipTest('Opening mlx5 context is not supported') def create_mkey(self): try: self.mkey = Mlx5Mkey(self.pd, self.mkey_create_flags, 3) except PyverbsRDMAError as ex: if ex.error_code in [errno.EOPNOTSUPP, errno.EPROTONOSUPPORT]: raise unittest.SkipTest('Create Mkey is not supported') raise ex def create_qp_cap(self): return QPCap(max_send_wr=self.num_msgs, max_recv_wr=self.num_msgs, max_inline_data=self.max_inline_data) def create_qp_init_attr(self): comp_mask = e.IBV_QP_INIT_ATTR_PD | e.IBV_QP_INIT_ATTR_SEND_OPS_FLAGS return QPInitAttrEx(cap=self.create_qp_cap(), pd=self.pd, scq=self.cq, rcq=self.cq, qp_type=e.IBV_QPT_RC, send_ops_flags=self.send_ops_flags, comp_mask=comp_mask) def create_qp_attr(self): attr = super().create_qp_attr() attr.qp_access_flags = self.qp_access_flags return attr def create_qps(self): try: qp_init_attr = self.create_qp_init_attr() comp_mask = dve.MLX5DV_QP_INIT_ATTR_MASK_QP_CREATE_FLAGS |\ dve.MLX5DV_QP_INIT_ATTR_MASK_SEND_OPS_FLAGS attr = Mlx5DVQPInitAttr(comp_mask=comp_mask, create_flags=self.dv_qp_create_flags, send_ops_flags=self.dv_send_ops_flags) qp = Mlx5QP(self.ctx, qp_init_attr, attr) self.qps.append(qp) self.qps_num.append(qp.qp_num) self.psns.append(random.getrandbits(24)) except PyverbsRDMAError as ex: if ex.error_code == errno.EOPNOTSUPP: raise unittest.SkipTest('Create Mlx5DV QP is not supported') raise ex class Mlx5MkeyTest(RDMATestCase): """ Test various functionalities of the mlx5 mkeys. """ def setUp(self): super().setUp() self.iters = 10 self.server = None self.client = None def reg_mr_list(self, configure_mkey=False): """ Register a list of SGEs using the player's mkeys. :param configure_mkey: If True, use the mkey configuration API. """ for player in [self.server, self.client]: player.qp.wr_start() player.qp.wr_flags = e.IBV_SEND_SIGNALED | e.IBV_SEND_INLINE sge_1 = SGE(player.mr.buf, 8, player.mr.lkey) sge_2 = SGE(player.mr.buf + 64, 8, player.mr.lkey) if configure_mkey: player.qp.wr_mkey_configure(player.mkey, 2, Mlx5MkeyConfAttr()) player.qp.wr_set_mkey_access_flags(e.IBV_ACCESS_LOCAL_WRITE) player.qp.wr_set_mkey_layout_list([sge_1, sge_2]) else: player.qp.wr_mr_list(player.mkey, e.IBV_ACCESS_LOCAL_WRITE, sge_list=[sge_1, sge_2]) player.qp.wr_complete() u.poll_cq(player.cq) def reg_mr_interleaved(self, configure_mkey=False): """ Register an interleaved memory layout using the player's mkeys. :param configure_mkey: Use the mkey configuration API. """ for player in [self.server, self.client]: player.qp.wr_start() player.qp.wr_flags = e.IBV_SEND_SIGNALED | e.IBV_SEND_INLINE mr_interleaved_1 = Mlx5MrInterleaved(addr=player.mr.buf, bytes_count=8, bytes_skip=2, lkey=player.mr.lkey) mr_interleaved_2 = Mlx5MrInterleaved(addr=player.mr.buf + 64, bytes_count=8, bytes_skip=2, lkey=player.mr.lkey) mr_interleaved_lst = [mr_interleaved_1, mr_interleaved_2] mkey_access = e.IBV_ACCESS_LOCAL_WRITE if configure_mkey: player.qp.wr_mkey_configure(player.mkey, 2, Mlx5MkeyConfAttr()) player.qp.wr_set_mkey_access_flags(mkey_access) player.qp.wr_set_mkey_layout_interleaved(3, mr_interleaved_lst) else: player.qp.wr_mr_interleaved(player.mkey, e.IBV_ACCESS_LOCAL_WRITE, repeat_count=3, mr_interleaved_lst=mr_interleaved_lst) player.qp.wr_complete() u.poll_cq(player.cq) def reg_mr_sig_t10dif(self): """ Register the player's mkeys with T10DIF signature on the wire domain. """ for player in [self.server, self.client]: player.qp.wr_start() player.qp.wr_flags = e.IBV_SEND_SIGNALED | e.IBV_SEND_INLINE sge = SGE(player.mr.buf, 512, player.mr.lkey) player.qp.wr_mkey_configure(player.mkey, 3, Mlx5MkeyConfAttr()) player.qp.wr_set_mkey_access_flags(e.IBV_ACCESS_LOCAL_WRITE) player.qp.wr_set_mkey_layout_list([sge]) t10dif_flags = dve.MLX5DV_SIG_T10DIF_FLAG_REF_REMAP sig_t10dif = Mlx5SigT10Dif(bg_type=dve.MLX5DV_SIG_T10DIF_CRC, bg=0xFFFF, app_tag=0xABCD, ref_tag=0x01234567, flags=t10dif_flags) sig_type = dve.MLX5DV_SIG_TYPE_T10DIF block_size = dve.MLX5DV_BLOCK_SIZE_512 sig_block_domain = Mlx5SigBlockDomain(sig_type=sig_type, dif=sig_t10dif, block_size=block_size) check_mask = (dve.MLX5DV_SIG_MASK_T10DIF_GUARD | dve.MLX5DV_SIG_MASK_T10DIF_APPTAG | dve.MLX5DV_SIG_MASK_T10DIF_REFTAG) sig_attr = Mlx5SigBlockAttr(wire=sig_block_domain, check_mask=check_mask) player.qp.wr_set_mkey_sig_block(sig_attr) player.qp.wr_complete() u.poll_cq(player.cq) def reg_mr_sig_crc(self): """ Register the player's mkeys with CRC32 signature on the wire domain. """ for player in [self.server, self.client]: player.qp.wr_start() player.qp.wr_flags = e.IBV_SEND_SIGNALED | e.IBV_SEND_INLINE sge = SGE(player.mr.buf, 512, player.mr.lkey) player.qp.wr_mkey_configure(player.mkey, 3, Mlx5MkeyConfAttr()) player.qp.wr_set_mkey_access_flags(e.IBV_ACCESS_LOCAL_WRITE) player.qp.wr_set_mkey_layout_list([sge]) sig_crc = Mlx5SigCrc(crc_type=dve.MLX5DV_SIG_CRC_TYPE_CRC32, seed=0xFFFFFFFF) sig_block_domain = Mlx5SigBlockDomain(sig_type=dve.MLX5DV_SIG_TYPE_CRC, crc=sig_crc, block_size=dve.MLX5DV_BLOCK_SIZE_512) sig_attr = Mlx5SigBlockAttr(wire=sig_block_domain, check_mask=dve.MLX5DV_SIG_MASK_CRC32) player.qp.wr_set_mkey_sig_block(sig_attr) player.qp.wr_complete() u.poll_cq(player.cq) def reg_mr_sig_err(self): """ Register the player's mkeys with an SGE and CRC32 signature on the memory domain. Data transport operation with these MKEYs will cause a signature error because the test does not fill out the signature in the memory buffer. """ sig_crc = Mlx5SigCrc(crc_type=dve.MLX5DV_SIG_CRC_TYPE_CRC32, seed=0xFFFFFFFF) block_size = dve.MLX5DV_BLOCK_SIZE_512 sig_block_domain = Mlx5SigBlockDomain(sig_type=dve.MLX5DV_SIG_TYPE_CRC, crc=sig_crc, block_size=block_size) sig_attr = Mlx5SigBlockAttr(mem=sig_block_domain, check_mask=dve.MLX5DV_SIG_MASK_CRC32) # Configure the mkey on the server side self.server.qp.wr_start() self.server.qp.wr_flags = e.IBV_SEND_SIGNALED | e.IBV_SEND_INLINE sge = SGE(self.server.mr.buf, 512, self.server.mr.lkey) self.server.qp.wr_mkey_configure(self.server.mkey, 2, Mlx5MkeyConfAttr()) self.server.qp.wr_set_mkey_access_flags(e.IBV_ACCESS_LOCAL_WRITE) self.server.qp.wr_set_mkey_layout_list([sge]) self.server.qp.wr_complete() u.poll_cq(self.server.cq) # Configure the mkey on the client side self.client.qp.wr_start() self.client.qp.wr_flags = e.IBV_SEND_SIGNALED | e.IBV_SEND_INLINE sge = SGE(self.client.mr.buf, 512 + 4, self.client.mr.lkey) self.client.qp.wr_mkey_configure(self.client.mkey, 3, Mlx5MkeyConfAttr()) self.client.qp.wr_set_mkey_access_flags(e.IBV_ACCESS_LOCAL_WRITE) self.client.qp.wr_set_mkey_layout_list([sge]) self.client.qp.wr_set_mkey_sig_block(sig_attr) self.client.qp.wr_complete() u.poll_cq(self.client.cq) def reg_mr_sig_pipelining_server(self): """ Register mkey without signature. """ self.server.qp.wr_start() self.server.qp.wr_flags = e.IBV_SEND_SIGNALED | e.IBV_SEND_INLINE sge = SGE(self.server.mr.buf, 512, self.server.mr.lkey) self.server.qp.wr_mkey_configure(self.server.mkey, 2, Mlx5MkeyConfAttr()) self.server.qp.wr_set_mkey_access_flags(e.IBV_ACCESS_LOCAL_WRITE | e.IBV_ACCESS_REMOTE_WRITE) self.server.qp.wr_set_mkey_layout_list([sge]) self.server.qp.wr_complete() u.poll_cq(self.server.cq) def reg_mr_sig_pipelining_client(self, check_mask=0): """ Register mkey with CRC32 signature in memory domain and no signature in wire domain. :param check_mask: The mask for the signature checking. """ self.client.qp.wr_start() self.client.qp.wr_flags = e.IBV_SEND_SIGNALED | e.IBV_SEND_INLINE # Add 4 bytes for CRC32 signature sge = SGE(self.client.mr.buf, 512 + 4, self.client.mr.lkey) self.client.qp.wr_mkey_configure(self.client.mkey, 3, Mlx5MkeyConfAttr()) self.client.qp.wr_set_mkey_access_flags(e.IBV_ACCESS_LOCAL_WRITE) self.client.qp.wr_set_mkey_layout_list([sge]) sig = Mlx5SigCrc(crc_type = dve.MLX5DV_SIG_CRC_TYPE_CRC32) sig_domain = Mlx5SigBlockDomain(sig_type=dve.MLX5DV_SIG_TYPE_CRC, crc=sig, block_size=dve.MLX5DV_BLOCK_SIZE_512) sig_attr = Mlx5SigBlockAttr(mem=sig_domain, check_mask=check_mask) self.client.qp.wr_set_mkey_sig_block(sig_attr) self.client.qp.wr_complete() u.poll_cq(self.client.cq) def build_traffic_elements(self, sge_size): """ Build the server and client send/recv work requests. :param sge_size: The sge send size using the mkey. """ opcode = e.IBV_WR_SEND server_sge = SGE(0, sge_size, self.server.mkey.lkey) self.server_recv_wr = RecvWR(sg=[server_sge], num_sge=1) client_sge = SGE(0, sge_size, self.client.mkey.lkey) self.client_send_wr = SendWR(opcode=opcode, num_sge=1, sg=[client_sge]) def build_traffic_elements_sig_pipelining(self): """ Build two WRs for data and response on client side and one WR for response on server side. Transaction consists of two operations: RDMA write of data and send/recv of response. Data size is 512 bytes, response size is 16 bytes. For simplicity the same memory is used for data and response. Data is transferred using the player signature mkey. Response is transferred using the plain MR. """ server_sge_resp = SGE(self.server.mr.buf, 16, self.server.mr.lkey) self.server_resp_wr = RecvWR(sg=[server_sge_resp], num_sge=1) client_sge_data = SGE(0, 512, self.client.mkey.lkey) self.client_data_wr = SendWR(wr_id=1, opcode=e.IBV_WR_RDMA_WRITE, num_sge=1, sg=[client_sge_data], send_flags=0) self.client_data_wr.set_wr_rdma(self.server.mkey.rkey, 0) client_sge_resp = SGE(self.client.mr.buf, 16, self.client.mr.lkey) client_send_flags = e.IBV_SEND_SIGNALED | e.IBV_SEND_FENCE self.client_resp_wr = SendWR(wr_id=1, opcode=e.IBV_WR_SEND, num_sge=1, sg=[client_sge_resp], send_flags=client_send_flags) def traffic(self, sge_size, exp_buffer): """ Perform RC traffic using the mkey. :param sge_size: The sge size using the mkey. :param exp_buffer: The expected result of the receive buffer after the traffic operation. """ self.build_traffic_elements(sge_size) self.server.qp.post_recv(self.server_recv_wr) for _ in range(self.iters): self.server.mr.write('s' * self.server.msg_size, self.server.msg_size) self.client.mr.write('c' * self.client.msg_size, self.client.msg_size) self.client.qp.post_send(self.client_send_wr) u.poll_cq(self.client.cq) u.poll_cq(self.server.cq) self.server.qp.post_recv(self.server_recv_wr) act_buffer = self.server.mr.read(len(exp_buffer), 0).decode() if act_buffer != exp_buffer: raise PyverbsError('Data validation failed: expected ' f'{exp_buffer}, received {act_buffer}') def traffic_scattered_data(self, sge_size=16): exp_buffer=((('c' * 8 + 's' * 56) *2)[:100]) self.traffic(sge_size=sge_size, exp_buffer=exp_buffer) def traffic_sig(self): exp_buffer=('c' * 512 + 's' * (self.server.msg_size - 512)) self.traffic(sge_size=512, exp_buffer=exp_buffer) def invalidate_mkeys(self): """ Invalidate the players mkey. """ for player in [self.server, self.client]: inv_send_wr = SendWR(opcode=e.IBV_WR_LOCAL_INV) inv_send_wr.imm_data = player.mkey.lkey player.qp.post_send(inv_send_wr) u.poll_cq(player.cq) def invalidate_mkeys_remotely(self): """ Client remotely invalidates the server's rkey """ sge = SGE(0,0, self.server.mkey.lkey) self.server.qp.post_recv(RecvWR(sg=[sge], num_sge=1)) self.client.qp.wr_start() self.client.qp.wr_flags = e.IBV_SEND_SIGNALED self.client.qp.wr_send_inv(self.server.mkey.rkey) sge = SGE(0, 0, self.client.mkey.lkey) self.client.qp.wr_set_sge(sge) self.client.qp.wr_complete() u.poll_cq(self.client.cq) u.poll_cq(self.server.cq) def test_mkey_remote_invalidate(self): """ Verify remote Mkey invalidation. Create Mkey, traffic using this mkey then the client invalidates the server's mkey remotly. """ self.create_players(Mlx5MkeyResources, mkey_create_flags=dve.MLX5DV_MKEY_INIT_ATTR_FLAGS_INDIRECT | dve.MLX5DV_MKEY_INIT_ATTR_FLAGS_REMOTE_INVALIDATE, dv_send_ops_flags=dve.MLX5DV_QP_EX_WITH_MKEY_CONFIGURE) self.reg_mr_list(configure_mkey=True) self.traffic_scattered_data() self.invalidate_mkeys_remotely() with self.assertRaises(PyverbsRDMAError): self.traffic_scattered_data() def check_mkey(self, player, expected=dve.MLX5DV_MKEY_NO_ERR): """ Check the player's mkey for a signature error. param player: Player to check. param expected: The expected result of the checking. """ mkey_err = player.mkey.mkey_check() if mkey_err.err_type != expected: raise PyverbsRDMAError('MKEY check failed: ' f'expected err_type: {expected}, ' f'actual err_type: {mkey_err.err_type}') def test_mkey_interleaved(self): """ Create Mkeys, register an interleaved memory layout using this mkey and then perform traffic using it. """ self.create_players(Mlx5MkeyResources, dv_send_ops_flags=dve.MLX5DV_QP_EX_WITH_MR_INTERLEAVED) self.reg_mr_interleaved() self.traffic_scattered_data() self.invalidate_mkeys() def test_mkey_list(self): """ Create Mkeys, register a memory layout using this mkey and then perform traffic using this mkey. """ self.create_players(Mlx5MkeyResources, dv_send_ops_flags=dve.MLX5DV_QP_EX_WITH_MR_LIST) self.reg_mr_list() self.traffic_scattered_data() self.invalidate_mkeys() def test_mkey_list_new_api(self): """ Create Mkeys, configure it with memory layout using the new API and traffic using this mkey. """ self.create_players(Mlx5MkeyResources, dv_send_ops_flags=dve.MLX5DV_QP_EX_WITH_MKEY_CONFIGURE) self.reg_mr_list(configure_mkey=True) self.traffic_scattered_data() self.invalidate_mkeys() def test_mkey_interleaved_new_api(self): """ Create Mkeys, configure it with interleaved memory layout using the new API and then perform traffic using it. """ self.create_players(Mlx5MkeyResources, dv_send_ops_flags=dve.MLX5DV_QP_EX_WITH_MKEY_CONFIGURE) self.reg_mr_interleaved(configure_mkey=True) self.traffic_scattered_data() self.invalidate_mkeys() def test_mkey_list_bad_flow(self): """ Create Mkeys, register a memory layout using this mkey and then try to access the memory out of the mkey defined region. Expect this case to fail. """ self.create_players(Mlx5MkeyResources, dv_send_ops_flags=dve.MLX5DV_QP_EX_WITH_MR_LIST) self.reg_mr_list() with self.assertRaises(PyverbsRDMAError) as ex: self.traffic_scattered_data(sge_size=100) def test_mkey_sig_t10dif(self): """ Create Mkeys, configure it with T10DIF signature and traffic using this mkey. """ self.create_players(Mlx5MkeyResources, dv_send_ops_flags=dve.MLX5DV_QP_EX_WITH_MKEY_CONFIGURE, mkey_create_flags=dve.MLX5DV_MKEY_INIT_ATTR_FLAGS_INDIRECT | dve.MLX5DV_MKEY_INIT_ATTR_FLAGS_BLOCK_SIGNATURE) self.reg_mr_sig_t10dif() self.traffic_sig() self.check_mkey(self.server) self.check_mkey(self.client) self.invalidate_mkeys() def test_mkey_sig_crc(self): """ Create Mkeys, configure it with CRC32 signature and traffic using this mkey. """ self.create_players(Mlx5MkeyResources, dv_send_ops_flags=dve.MLX5DV_QP_EX_WITH_MKEY_CONFIGURE, mkey_create_flags=dve.MLX5DV_MKEY_INIT_ATTR_FLAGS_INDIRECT | dve.MLX5DV_MKEY_INIT_ATTR_FLAGS_BLOCK_SIGNATURE) self.reg_mr_sig_crc() self.traffic_sig() self.check_mkey(self.server) self.check_mkey(self.client) self.invalidate_mkeys() def test_mkey_sig_err(self): """ Test the signature error handling flow. Create Mkeys, configure it CRC32 signature on the memory domain but do not set a valid signature in the memory buffer. Run traffic using this mkey, ensure that the signature error is detected. """ self.create_players(Mlx5MkeyResources, dv_send_ops_flags=dve.MLX5DV_QP_EX_WITH_MKEY_CONFIGURE, mkey_create_flags=dve.MLX5DV_MKEY_INIT_ATTR_FLAGS_INDIRECT | dve.MLX5DV_MKEY_INIT_ATTR_FLAGS_BLOCK_SIGNATURE) self.reg_mr_sig_err() # The test supports only one iteration because mkey re-registration # is required after each signature error. self.iters = 1 self.traffic_sig() self.check_mkey(self.client, dve.MLX5DV_MKEY_SIG_BLOCK_BAD_GUARD) self.check_mkey(self.server) self.invalidate_mkeys() def test_mkey_sig_pipelining_good(self): """ Test the good signature pipelining scenario. """ self.create_players(Mlx5MkeyResources, dv_send_ops_flags=dve.MLX5DV_QP_EX_WITH_MKEY_CONFIGURE, mkey_create_flags=dve.MLX5DV_MKEY_INIT_ATTR_FLAGS_INDIRECT | dve.MLX5DV_MKEY_INIT_ATTR_FLAGS_BLOCK_SIGNATURE, dv_qp_create_flags=dve.MLX5DV_QP_CREATE_DISABLE_SCATTER_TO_CQE | dve.MLX5DV_QP_CREATE_SIG_PIPELINING) self.reg_mr_sig_pipelining_client() self.reg_mr_sig_pipelining_server() self.build_traffic_elements_sig_pipelining() self.server.qp.post_recv(self.server_resp_wr) self.client.qp.post_send(self.client_data_wr) self.client.qp.post_send(self.client_resp_wr) u.poll_cq(self.client.cq) u.poll_cq(self.server.cq) def test_mkey_sig_pipelining_bad(self): """ Test the bad signature pipelining scenario. """ self.create_players(Mlx5MkeyResources, dv_send_ops_flags=dve.MLX5DV_QP_EX_WITH_MKEY_CONFIGURE, mkey_create_flags=dve.MLX5DV_MKEY_INIT_ATTR_FLAGS_INDIRECT | dve.MLX5DV_MKEY_INIT_ATTR_FLAGS_BLOCK_SIGNATURE, dv_qp_create_flags=dve.MLX5DV_QP_CREATE_DISABLE_SCATTER_TO_CQE | dve.MLX5DV_QP_CREATE_SIG_PIPELINING) self.reg_mr_sig_pipelining_client(check_mask=dve.MLX5DV_SIG_MASK_CRC32) self.reg_mr_sig_pipelining_server() self.build_traffic_elements_sig_pipelining() self.server.qp.post_recv(self.server_resp_wr) self.client.qp.post_send(self.client_data_wr) self.client.qp.post_send(self.client_resp_wr) # Expect SQ_DRAINED event event = self.client.ctx.get_async_event() event.ack() self.assertEqual(event.event_type, e.IBV_EVENT_SQ_DRAINED) # No completion is expected on the client side nc, _ = self.client.cq.poll(1) self.assertEqual(nc, 0) # No completion is expected on the server side nc, _ = self.server.cq.poll(1) self.assertEqual(nc, 0) self.check_mkey(self.client, dve.MLX5DV_MKEY_SIG_BLOCK_BAD_GUARD) self.check_mkey(self.server) # Cancel and repost response WR canceled_count = self.client.qp.cancel_posted_send_wrs(1) self.assertEqual(canceled_count, 1) self.client.qp.post_send(self.client_resp_wr) # Move QP back to RTS and receive completions self.client.qp.modify(QPAttr(qp_state=e.IBV_QPS_RTS, cur_qp_state=e.IBV_QPS_SQD), e.IBV_QP_STATE | e.IBV_QP_CUR_STATE) u.poll_cq(self.client.cq) u.poll_cq(self.server.cq)