Use single last queue of the device and probe it dynamically.
Reviewed-by: Mina Almasry <almasrymina@xxxxxxxxxx>
Signed-off-by: Stanislav Fomichev <sdf@xxxxxxxxxxx>
---
tools/testing/selftests/net/ncdevmem.c | 40 ++++++++++++++++++++++++--
1 file changed, 38 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/net/ncdevmem.c b/tools/testing/selftests/net/ncdevmem.c
index be89735d6408..044198ce02a7 100644
--- a/tools/testing/selftests/net/ncdevmem.c
+++ b/tools/testing/selftests/net/ncdevmem.c
@@ -75,8 +75,8 @@ static char *server_ip;
static char *client_ip;
static char *port;
static size_t do_validation;
-static int start_queue = 8;
-static int num_queues = 8;
+static int start_queue = -1;
+static int num_queues = 1;
static char *ifname;
static unsigned int ifindex;
static unsigned int dmabuf_id;
@@ -208,6 +208,33 @@ void validate_buffer(void *line, size_t size)
fprintf(stdout, "Validated buffer\n");
}
+static int rxq_num(int ifindex)
+{
+ struct ethtool_channels_get_req *req;
+ struct ethtool_channels_get_rsp *rsp;
+ struct ynl_error yerr;
+ struct ynl_sock *ys;
+ int num = -1;
+
+ ys = ynl_sock_create(&ynl_ethtool_family, &yerr);
+ if (!ys) {
+ fprintf(stderr, "YNL: %s\n", yerr.msg);
+ return -1;
+ }
+
+ req = ethtool_channels_get_req_alloc();
+ ethtool_channels_get_req_set_header_dev_index(req, ifindex);
+ rsp = ethtool_channels_get(ys, req);
+ if (rsp)
+ num = rsp->rx_count + rsp->combined_count;
+ ethtool_channels_get_req_free(req);
+ ethtool_channels_get_rsp_free(rsp);
+
+ ynl_sock_destroy(ys);
+
+ return num;
+}
+
#define run_command(cmd, ...) \
({ \
char command[256]; \
@@ -715,6 +742,15 @@ int main(int argc, char *argv[])
ifindex = if_nametoindex(ifname);
+ if (start_queue < 0) {
+ start_queue = rxq_num(ifindex) - 1;
+
+ if (start_queue < 0)
+ error(1, 0, "couldn't detect number of queues\n");
+
+ fprintf(stderr, "using queues %d..%d\n", start_queue, start_queue + num_queues);
+ }
+
for (; optind < argc; optind++)
fprintf(stderr, "extra arguments: %s\n", argv[optind]);
--
2.47.0
