@@ -53,6 +53,12 @@ tests = {
'test-virtio-dmabuf': [meson.project_source_root() / 'hw/display/virtio-dmabuf.c'],
}
+if config_host_data.get('CONFIG_DSA_OPT')
+ tests += {
+ 'test-dsa': [],
+ }
+endif
+
if have_system or have_tools
tests += {
'test-qmp-event': [testqapi],
new file mode 100644
@@ -0,0 +1,448 @@
+/*
+ * Test DSA functions.
+ *
+ * Copyright (c) 2023 Hao Xiang <hao.xiang@bytedance.com>
+ * Copyright (c) 2023 Bryan Zhang <bryan.zhang@bytedance.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+#include "qemu/osdep.h"
+#include "qemu/host-utils.h"
+
+#include "qemu/cutils.h"
+#include "qemu/memalign.h"
+#include "qemu/dsa.h"
+
+// TODO Make these not-hardcoded.
+static const char *path1 = "/dev/dsa/wq4.0";
+static const char *path2 = "/dev/dsa/wq4.0 /dev/dsa/wq4.1";
+static const int num_devices = 2;
+
+static struct buffer_zero_batch_task batch_task __attribute__((aligned(64)));
+
+// TODO Communicate that DSA must be configured to support this batch size.
+// TODO Alternatively, poke the DSA device to figure out batch size.
+static int batch_size = 128;
+static int page_size = 4096;
+
+// A helper for running a single task and checking for correctness.
+static void do_single_task(void)
+{
+ buffer_zero_batch_task_init(&batch_task, batch_size);
+ char buf[page_size];
+ char* ptr = buf;
+
+ buffer_is_zero_dsa_batch_async(&batch_task,
+ (const void**) &ptr,
+ 1,
+ page_size);
+ g_assert(batch_task.results[0] == buffer_is_zero(buf, page_size));
+}
+
+static void test_single_zero(void)
+{
+ g_assert(!dsa_init(path1));
+ dsa_start();
+
+ buffer_zero_batch_task_init(&batch_task, batch_size);
+
+ char buf[page_size];
+ char* ptr = buf;
+
+ memset(buf, 0x0, page_size);
+ buffer_is_zero_dsa_batch_async(&batch_task,
+ (const void**) &ptr,
+ 1, page_size);
+ g_assert(batch_task.results[0]);
+
+ dsa_cleanup();
+}
+
+static void test_single_zero_async(void)
+{
+ test_single_zero();
+}
+
+static void test_single_nonzero(void)
+{
+ g_assert(!dsa_init(path1));
+ dsa_start();
+
+ buffer_zero_batch_task_init(&batch_task, batch_size);
+
+ char buf[page_size];
+ char* ptr = buf;
+
+ memset(buf, 0x1, page_size);
+ buffer_is_zero_dsa_batch_async(&batch_task,
+ (const void**) &ptr,
+ 1, page_size);
+ g_assert(!batch_task.results[0]);
+
+ dsa_cleanup();
+}
+
+static void test_single_nonzero_async(void)
+{
+ test_single_nonzero();
+}
+
+// count == 0 should return quickly without calling into DSA.
+static void test_zero_count_async(void)
+{
+ char buf[page_size];
+ buffer_is_zero_dsa_batch_async(&batch_task,
+ (const void **) &buf,
+ 0,
+ page_size);
+}
+
+static void test_null_task_async(void)
+{
+ if (g_test_subprocess()) {
+ g_assert(!dsa_init(path1));
+
+ char buf[page_size * batch_size];
+ char *addrs[batch_size];
+ for (int i = 0; i < batch_size; i++) {
+ addrs[i] = buf + (page_size * i);
+ }
+
+ buffer_is_zero_dsa_batch_async(NULL, (const void**) addrs, batch_size,
+ page_size);
+ } else {
+ g_test_trap_subprocess(NULL, 0, 0);
+ g_test_trap_assert_failed();
+ }
+}
+
+static void test_oversized_batch(void)
+{
+ g_assert(!dsa_init(path1));
+ dsa_start();
+
+ buffer_zero_batch_task_init(&batch_task, batch_size);
+
+ int oversized_batch_size = batch_size + 1;
+ char buf[page_size * oversized_batch_size];
+ char *addrs[batch_size];
+ for (int i = 0; i < oversized_batch_size; i++) {
+ addrs[i] = buf + (page_size * i);
+ }
+
+ int ret = buffer_is_zero_dsa_batch_async(&batch_task,
+ (const void**) addrs,
+ oversized_batch_size,
+ page_size);
+ g_assert(ret != 0);
+
+ dsa_cleanup();
+}
+
+static void test_oversized_batch_async(void)
+{
+ test_oversized_batch();
+}
+
+static void test_zero_len_async(void)
+{
+ if (g_test_subprocess()) {
+ g_assert(!dsa_init(path1));
+
+ buffer_zero_batch_task_init(&batch_task, batch_size);
+
+ char buf[page_size];
+
+ buffer_is_zero_dsa_batch_async(&batch_task,
+ (const void**) &buf,
+ 1,
+ 0);
+ } else {
+ g_test_trap_subprocess(NULL, 0, 0);
+ g_test_trap_assert_failed();
+ }
+}
+
+static void test_null_buf_async(void)
+{
+ if (g_test_subprocess()) {
+ g_assert(!dsa_init(path1));
+
+ buffer_zero_batch_task_init(&batch_task, batch_size);
+
+ buffer_is_zero_dsa_batch_async(&batch_task, NULL, 1, page_size);
+ } else {
+ g_test_trap_subprocess(NULL, 0, 0);
+ g_test_trap_assert_failed();
+ }
+}
+
+static void test_batch(void)
+{
+ g_assert(!dsa_init(path1));
+ dsa_start();
+
+ buffer_zero_batch_task_init(&batch_task, batch_size);
+
+ char buf[page_size * batch_size];
+ char *addrs[batch_size];
+ for (int i = 0; i < batch_size; i++) {
+ addrs[i] = buf + (page_size * i);
+ }
+
+ // Using whatever is on the stack is somewhat random.
+ // Manually set some pages to zero and some to nonzero.
+ memset(buf + 0, 0, page_size * 10);
+ memset(buf + (10 * page_size), 0xff, page_size * 10);
+
+ buffer_is_zero_dsa_batch_async(&batch_task,
+ (const void**) addrs,
+ batch_size,
+ page_size);
+
+ bool is_zero;
+ for (int i = 0; i < batch_size; i++) {
+ is_zero = buffer_is_zero((const void*) &buf[page_size * i], page_size);
+ g_assert(batch_task.results[i] == is_zero);
+ }
+ dsa_cleanup();
+}
+
+static void test_batch_async(void)
+{
+ test_batch();
+}
+
+static void test_page_fault(void)
+{
+ g_assert(!dsa_init(path1));
+ dsa_start();
+
+ char* buf[2];
+ int prot = PROT_READ | PROT_WRITE;
+ int flags = MAP_SHARED | MAP_ANON;
+ buf[0] = (char*) mmap(NULL, page_size * batch_size, prot, flags, -1, 0);
+ assert(buf[0] != MAP_FAILED);
+ buf[1] = (char*) malloc(page_size * batch_size);
+ assert(buf[1] != NULL);
+
+ for (int j = 0; j < 2; j++) {
+ buffer_zero_batch_task_init(&batch_task, batch_size);
+
+ char *addrs[batch_size];
+ for (int i = 0; i < batch_size; i++) {
+ addrs[i] = buf[j] + (page_size * i);
+ }
+
+ buffer_is_zero_dsa_batch_async(&batch_task,
+ (const void**) addrs,
+ batch_size,
+ page_size);
+
+ bool is_zero;
+ for (int i = 0; i < batch_size; i++) {
+ is_zero = buffer_is_zero((const void*) &buf[j][page_size * i], page_size);
+ g_assert(batch_task.results[i] == is_zero);
+ }
+ }
+
+ assert(!munmap(buf[0], page_size * batch_size));
+ free(buf[1]);
+ dsa_cleanup();
+}
+
+static void test_various_buffer_sizes(void)
+{
+ g_assert(!dsa_init(path1));
+ dsa_start();
+
+ int len = 1 << 4;
+ for (int count = 12; count > 0; count--, len <<= 1) {
+ buffer_zero_batch_task_init(&batch_task, batch_size);
+
+ char buf[len * batch_size];
+ char *addrs[batch_size];
+ for (int i = 0; i < batch_size; i++) {
+ addrs[i] = buf + (len * i);
+ }
+
+ buffer_is_zero_dsa_batch_async(&batch_task,
+ (const void**) addrs,
+ batch_size,
+ len);
+
+ bool is_zero;
+ for (int j = 0; j < batch_size; j++) {
+ is_zero = buffer_is_zero((const void*) &buf[len * j], len);
+ g_assert(batch_task.results[j] == is_zero);
+ }
+ }
+
+ dsa_cleanup();
+}
+
+static void test_various_buffer_sizes_async(void)
+{
+ test_various_buffer_sizes();
+}
+
+static void test_double_start_stop(void)
+{
+ g_assert(!dsa_init(path1));
+ // Double start
+ dsa_start();
+ dsa_start();
+ g_assert(dsa_is_running());
+ do_single_task();
+
+ // Double stop
+ dsa_stop();
+ g_assert(!dsa_is_running());
+ dsa_stop();
+ g_assert(!dsa_is_running());
+
+ // Restart
+ dsa_start();
+ g_assert(dsa_is_running());
+ do_single_task();
+ dsa_cleanup();
+}
+
+static void test_is_running(void)
+{
+ g_assert(!dsa_init(path1));
+
+ g_assert(!dsa_is_running());
+ dsa_start();
+ g_assert(dsa_is_running());
+ dsa_stop();
+ g_assert(!dsa_is_running());
+ dsa_cleanup();
+}
+
+static void test_multiple_engines(void)
+{
+ g_assert(!dsa_init(path2));
+ dsa_start();
+
+ struct buffer_zero_batch_task tasks[num_devices]
+ __attribute__((aligned(64)));
+ char bufs[num_devices][page_size * batch_size];
+ char *addrs[num_devices][batch_size];
+
+ // This is a somewhat implementation-specific way of testing that the tasks
+ // have unique engines assigned to them.
+ buffer_zero_batch_task_init(&tasks[0], batch_size);
+ buffer_zero_batch_task_init(&tasks[1], batch_size);
+ g_assert(tasks[0].device != tasks[1].device);
+
+ for (int i = 0; i < num_devices; i++) {
+ for (int j = 0; j < batch_size; j++) {
+ addrs[i][j] = bufs[i] + (page_size * j);
+ }
+
+ buffer_is_zero_dsa_batch_async(&tasks[i],
+ (const void**) addrs[i],
+ batch_size, page_size);
+
+ bool is_zero;
+ for (int j = 0; j < batch_size; j++) {
+ is_zero = buffer_is_zero((const void*) &bufs[i][page_size * j],
+ page_size);
+ g_assert(tasks[i].results[j] == is_zero);
+ }
+ }
+
+ dsa_cleanup();
+}
+
+static void test_configure_dsa_twice(void)
+{
+ g_assert(!dsa_init(path2));
+ g_assert(!dsa_init(path2));
+ dsa_start();
+ do_single_task();
+ dsa_cleanup();
+}
+
+static void test_configure_dsa_bad_path(void)
+{
+ const char* bad_path = "/not/a/real/path";
+ g_assert(dsa_init(bad_path));
+}
+
+static void test_cleanup_before_configure(void)
+{
+ dsa_cleanup();
+ g_assert(!dsa_init(path2));
+}
+
+static void test_configure_dsa_num_devices(void)
+{
+ g_assert(!dsa_init(path1));
+ dsa_start();
+
+ do_single_task();
+ dsa_stop();
+ dsa_cleanup();
+}
+
+static void test_cleanup_twice(void)
+{
+ g_assert(!dsa_init(path2));
+ dsa_cleanup();
+ dsa_cleanup();
+
+ g_assert(!dsa_init(path2));
+ dsa_start();
+ do_single_task();
+ dsa_cleanup();
+}
+
+int main(int argc, char **argv)
+{
+ g_test_init(&argc, &argv, NULL);
+
+ if (getenv("QEMU_TEST_FLAKY_TESTS")) {
+ g_test_add_func("/dsa/page_fault", test_page_fault);
+ }
+
+ if (num_devices > 1) {
+ g_test_add_func("/dsa/multiple_engines", test_multiple_engines);
+ }
+
+ g_test_add_func("/dsa/async/batch", test_batch_async);
+ g_test_add_func("/dsa/async/various_buffer_sizes",
+ test_various_buffer_sizes_async);
+ g_test_add_func("/dsa/async/null_buf", test_null_buf_async);
+ g_test_add_func("/dsa/async/zero_len", test_zero_len_async);
+ g_test_add_func("/dsa/async/oversized_batch", test_oversized_batch_async);
+ g_test_add_func("/dsa/async/zero_count", test_zero_count_async);
+ g_test_add_func("/dsa/async/single_zero", test_single_zero_async);
+ g_test_add_func("/dsa/async/single_nonzero", test_single_nonzero_async);
+ g_test_add_func("/dsa/async/null_task", test_null_task_async);
+
+ g_test_add_func("/dsa/double_start_stop", test_double_start_stop);
+ g_test_add_func("/dsa/is_running", test_is_running);
+
+ g_test_add_func("/dsa/configure_dsa_twice", test_configure_dsa_twice);
+ g_test_add_func("/dsa/configure_dsa_bad_path", test_configure_dsa_bad_path);
+ g_test_add_func("/dsa/cleanup_before_configure",
+ test_cleanup_before_configure);
+ g_test_add_func("/dsa/configure_dsa_num_devices",
+ test_configure_dsa_num_devices);
+ g_test_add_func("/dsa/cleanup_twice", test_cleanup_twice);
+
+ return g_test_run();
+}