selftests: drv-net: devmem: flip the direction of Tx tests

The Device Under Test should always be the local system.
While the Rx test gets this right the Tx test is sending
from remote to local. So Tx of DMABUF memory happens on remote.

These tests never run in NIPA since we don't have a compatible
device so we haven't caught this.

Reviewed-by: Joe Damato <joe@dama.to>
Reviewed-by: Mina Almasry <almasrymina@google.com>
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Link: https://patch.msgid.link/20250811231334.561137-6-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/tools/testing/selftests/drivers/net/hw/devmem.py b/tools/testing/selftests/drivers/net/hw/devmem.py
index 0a2533a3d6d6039283c4d946264e68282b4ca3ef..45c2d49d55b614fa07e50e3764092b305b7fa5ea 100755 (executable)
--- a/tools/testing/selftests/drivers/net/hw/devmem.py
+++ b/tools/testing/selftests/drivers/net/hw/devmem.py
@@ -42,9 +42,9 @@ def check_tx(cfg) -> None:
     port = rand_port()
     listen_cmd = f"socat -U - TCP{cfg.addr_ipver}-LISTEN:{port}"
 
-    with bkg(listen_cmd) as socat:
-        wait_port_listen(port)
-        cmd(f"echo -e \"hello\\nworld\"| {cfg.bin_remote} -f {cfg.ifname} -s {cfg.addr} -p {port}", host=cfg.remote, shell=True)
+    with bkg(listen_cmd, host=cfg.remote, exit_wait=True) as socat:
+        wait_port_listen(port, host=cfg.remote)
+        cmd(f"echo -e \"hello\\nworld\"| {cfg.bin_local} -f {cfg.ifname} -s {cfg.remote_addr} -p {port}", shell=True)
 
     ksft_eq(socat.stdout.strip(), "hello\nworld")
 
@@ -56,9 +56,9 @@ def check_tx_chunks(cfg) -> None:
     port = rand_port()
     listen_cmd = f"socat -U - TCP{cfg.addr_ipver}-LISTEN:{port}"
 
-    with bkg(listen_cmd, exit_wait=True) as socat:
-        wait_port_listen(port)
-        cmd(f"echo -e \"hello\\nworld\"| {cfg.bin_remote} -f {cfg.ifname} -s {cfg.addr} -p {port} -z 3", host=cfg.remote, shell=True)
+    with bkg(listen_cmd, host=cfg.remote, exit_wait=True) as socat:
+        wait_port_listen(port, host=cfg.remote)
+        cmd(f"echo -e \"hello\\nworld\"| {cfg.bin_local} -f {cfg.ifname} -s {cfg.remote_addr} -p {port} -z 3", shell=True)
 
     ksft_eq(socat.stdout.strip(), "hello\nworld")