Add a unit test to verify the features ioctl commands. Test support added
for locating a features device, retrieve and verify the supported features
commands, retrieve specific feature command data, retrieve test feature
data, and write and verify test feature data.
Acked-by: Dan Williams <dan.j.willi...@intel.com>
Signed-off-by: Dave Jiang <dave.ji...@intel.com>
---
cxl/fwctl/cxl.h | 2 +-
test/cxl-features.sh | 31 +++
test/fwctl.c | 439 +++++++++++++++++++++++++++++++++++++++++++
test/meson.build | 19 ++
4 files changed, 490 insertions(+), 1 deletion(-)
create mode 100755 test/cxl-features.sh
create mode 100644 test/fwctl.c
diff --git a/cxl/fwctl/cxl.h b/cxl/fwctl/cxl.h
index 43f522f0cdcd..c560b2a1181d 100644
--- a/cxl/fwctl/cxl.h
+++ b/cxl/fwctl/cxl.h
@@ -9,7 +9,7 @@
#include <linux/types.h>
#include <linux/stddef.h>
-#include <cxl/features.h>
+#include "features.h"
/**
* struct fwctl_rpc_cxl - ioctl(FWCTL_RPC) input for CXL
diff --git a/test/cxl-features.sh b/test/cxl-features.sh
new file mode 100755
index 000000000000..3498fa08be53
--- /dev/null
+++ b/test/cxl-features.sh
@@ -0,0 +1,31 @@
+#!/bin/bash -Ex
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2025 Intel Corporation. All rights reserved.
+
+rc=77
+# 237 is -ENODEV
+ERR_NODEV=237
+
+. $(dirname $0)/common
+FEATURES="$TEST_PATH"/fwctl
+
+trap 'err $LINENO' ERR
+
+modprobe cxl_test
+
+test -x "$FEATURES" || do_skip "no CXL Features Contrl"
+# disable trap
+trap - $(compgen -A signal)
+"$FEATURES"
+rc=$?
+
+echo "error: $rc"
+if [ "$rc" -eq "$ERR_NODEV" ]; then
+ do_skip "no CXL FWCTL char dev"
+elif [ "$rc" -ne 0 ]; then
+ echo "fail: $LINENO" && exit 1
+fi
+
+trap 'err $LINENO' ERR
+
+_cxl_cleanup
diff --git a/test/fwctl.c b/test/fwctl.c
new file mode 100644
index 000000000000..7a780e718872
--- /dev/null
+++ b/test/fwctl.c
@@ -0,0 +1,439 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2024-2025 Intel Corporation. All rights reserved.
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <endian.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <syslog.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <cxl/libcxl.h>
+#include <linux/uuid.h>
+#include <uuid/uuid.h>
+#include <util/bitmap.h>
+#include <cxl/fwctl/features.h>
+#include <cxl/fwctl/fwctl.h>
+#include <cxl/fwctl/cxl.h>
+
+static const char provider[] = "cxl_test";
+
+UUID_DEFINE(test_uuid,
+ 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff,
+ 0xff, 0xff,
+ 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
+);
+
+#define CXL_MBOX_OPCODE_GET_SUPPORTED_FEATURES 0x0500
+#define CXL_MBOX_OPCODE_GET_FEATURE 0x0501
+#define CXL_MBOX_OPCODE_SET_FEATURE 0x0502
+
+#define GET_FEAT_SIZE 4
+#define SET_FEAT_SIZE 4
+#define EFFECTS_MASK (BIT(0) | BIT(9))
+
+#define MAX_TEST_FEATURES 1
+#define DEFAULT_TEST_DATA 0xdeadbeef
+#define DEFAULT_TEST_DATA2 0xabcdabcd
+
+struct test_feature {
+ uuid_t uuid;
+ size_t get_size;
+ size_t set_size;
+};
+
+static int send_command(int fd, struct fwctl_rpc *rpc, struct
fwctl_rpc_cxl_out *out)
+{
+ if (ioctl(fd, FWCTL_RPC, rpc) == -1) {
+ fprintf(stderr, "RPC ioctl error: %s\n", strerror(errno));
+ return -errno;
+ }
+
+ if (out->retval) {
+ fprintf(stderr, "operation returned failure: %d\n",
out->retval);
+ return -ENXIO;
+ }
+
+ return 0;
+}
+
+static int get_scope(u16 opcode)
+{
+ switch (opcode) {
+ case CXL_MBOX_OPCODE_GET_SUPPORTED_FEATURES:
+ case CXL_MBOX_OPCODE_GET_FEATURE:
+ return FWCTL_RPC_CONFIGURATION;
+ case CXL_MBOX_OPCODE_SET_FEATURE:
+ return FWCTL_RPC_DEBUG_WRITE_FULL;
+ default:
+ return -EINVAL;
+ }
+}
+
+static size_t hw_op_size(u16 opcode)
+{
+ switch (opcode) {
+ case CXL_MBOX_OPCODE_GET_SUPPORTED_FEATURES:
+ return sizeof(struct cxl_mbox_get_sup_feats_in);
+ case CXL_MBOX_OPCODE_GET_FEATURE:
+ return sizeof(struct cxl_mbox_get_feat_in);
+ case CXL_MBOX_OPCODE_SET_FEATURE:
+ return sizeof(struct cxl_mbox_set_feat_in) + sizeof(u32);
+ default:
+ return SIZE_MAX;
+ }
+}
+
+static void free_rpc(struct fwctl_rpc *rpc)
+{
+ void *in, *out;
+
+ in = (void *)rpc->in;
+ out = (void *)rpc->out;
+ free(in);
+ free(out);
+ free(rpc);
+}
+
+static void *zmalloc_aligned(size_t align, size_t size)
+{
+ void *ptr;
+ int rc;
+
+ rc = posix_memalign((void **)&ptr, align, size);
+ if (rc)
+ return NULL;
+ memset(ptr, 0, size);
+
+ return ptr;
+}
+
+static struct fwctl_rpc *get_prepped_command(size_t in_size, size_t out_size,
+ u16 opcode)
+{
+ struct fwctl_rpc_cxl_out *out;
+ struct fwctl_rpc_cxl *in;
+ struct fwctl_rpc *rpc;
+ size_t op_size;
+ int scope;
+
+ rpc = zmalloc_aligned(16, sizeof(*rpc));
+ if (!rpc)
+ return NULL;
+
+ in = zmalloc_aligned(16, in_size);
+ if (!in)
+ goto free_rpc;
+
+ out = zmalloc_aligned(16, out_size);
+ if (!out)
+ goto free_in;
+
+ in->opcode = opcode;
+
+ op_size = hw_op_size(opcode);
+ if (op_size == SIZE_MAX)
+ goto free_in;
+
+ in->op_size = op_size;
+
+ rpc->size = sizeof(*rpc);
+ scope = get_scope(opcode);
+ if (scope < 0)
+ goto free_all;
+
+ rpc->scope = scope;
+
+ rpc->in_len = in_size;
+ rpc->out_len = out_size;
+ rpc->in = (uint64_t)(uint64_t *)in;
+ rpc->out = (uint64_t)(uint64_t *)out;
+
+ return rpc;
+
+free_all:
+ free(out);
+free_in:
+ free(in);
+free_rpc:
+ free(rpc);
+ return NULL;
+}
+
+static int cxl_fwctl_rpc_get_test_feature(int fd, struct test_feature
*feat_ctx,
+ const uint32_t expected_data)
+{
+ struct cxl_mbox_get_feat_in *feat_in;
+ struct fwctl_rpc_cxl_out *out;
+ size_t out_size, in_size;
+ struct fwctl_rpc_cxl *in;
+ struct fwctl_rpc *rpc;
+ uint32_t val;
+ void *data;
+ int rc;
+
+ in_size = sizeof(*in) + sizeof(*feat_in);
+ out_size = sizeof(*out) + feat_ctx->get_size;
+
+ rpc = get_prepped_command(in_size, out_size,
+ CXL_MBOX_OPCODE_GET_FEATURE);
+ if (!rpc)
+ return -ENXIO;
+
+ in = (struct fwctl_rpc_cxl *)rpc->in;
+ out = (struct fwctl_rpc_cxl_out *)rpc->out;
+
+ feat_in = &in->get_feat_in;
+ uuid_copy(feat_in->uuid, feat_ctx->uuid);
+ feat_in->count = feat_ctx->get_size;
+
+ rc = send_command(fd, rpc, out);
+ if (rc)
+ goto out;
+
+ data = out->payload;
+ val = le32toh(*(__le32 *)data);
+ if (memcmp(&val, &expected_data, sizeof(val)) != 0) {
+ rc = -ENXIO;
+ goto out;
+ }
+
+out:
+ free_rpc(rpc);
+ return rc;
+}
+
+static int cxl_fwctl_rpc_set_test_feature(int fd, struct test_feature
*feat_ctx)
+{
+ struct cxl_mbox_set_feat_in *feat_in;
+ struct fwctl_rpc_cxl_out *out;
+ size_t in_size, out_size;
+ struct fwctl_rpc_cxl *in;
+ struct fwctl_rpc *rpc;
+ uint32_t val;
+ void *data;
+ int rc;
+
+ in_size = sizeof(*in) + sizeof(*feat_in) + sizeof(val);
+ out_size = sizeof(*out) + sizeof(val);
+ rpc = get_prepped_command(in_size, out_size,
+ CXL_MBOX_OPCODE_SET_FEATURE);
+ if (!rpc)
+ return -ENXIO;
+
+ in = (struct fwctl_rpc_cxl *)rpc->in;
+ out = (struct fwctl_rpc_cxl_out *)rpc->out;
+ feat_in = &in->set_feat_in;
+ uuid_copy(feat_in->uuid, feat_ctx->uuid);
+ data = feat_in->feat_data;
+ val = DEFAULT_TEST_DATA2;
+ *(uint32_t *)data = htole32(val);
+ feat_in->flags = CXL_SET_FEAT_FLAG_FULL_DATA_TRANSFER;
+
+ rc = send_command(fd, rpc, out);
+ if (rc)
+ goto out;
+
+ rc = cxl_fwctl_rpc_get_test_feature(fd, feat_ctx, DEFAULT_TEST_DATA2);
+ if (rc) {
+ fprintf(stderr, "Failed ioctl to get feature verify: %d\n", rc);
+ goto out;
+ }
+
+out:
+ free_rpc(rpc);
+ return rc;
+}
+
+static int cxl_fwctl_rpc_get_supported_features(int fd, struct test_feature
*feat_ctx)
+{
+ struct cxl_mbox_get_sup_feats_out *feat_out;
+ struct cxl_mbox_get_sup_feats_in *feat_in;
+ struct fwctl_rpc_cxl_out *out;
+ struct cxl_feat_entry *entry;
+ size_t out_size, in_size;
+ struct fwctl_rpc_cxl *in;
+ struct fwctl_rpc *rpc;
+ int feats, rc;
+
+ in_size = sizeof(*in) + sizeof(*feat_in);
+ out_size = sizeof(*out) + sizeof(*feat_out);
+ /* First query, to get number of features w/o per feature data */
+ rpc = get_prepped_command(in_size, out_size,
+ CXL_MBOX_OPCODE_GET_SUPPORTED_FEATURES);
+ if (!rpc)
+ return -ENXIO;
+
+ /* No need to fill in feat_in first go as we are passing in all 0's */
+
+ out = (struct fwctl_rpc_cxl_out *)rpc->out;
+ rc = send_command(fd, rpc, out);
+ if (rc)
+ goto out;
+
+ feat_out = &out->get_sup_feats_out;
+ feats = le16toh(feat_out->supported_feats);
+ if (feats != MAX_TEST_FEATURES) {
+ fprintf(stderr, "Test device has greater than %d test
features.\n",
+ MAX_TEST_FEATURES);
+ rc = -ENXIO;
+ goto out;
+ }
+
+ free_rpc(rpc);
+
+ /* Going second round to retrieve each feature details */
+ in_size = sizeof(*in) + sizeof(*feat_in);
+ out_size = sizeof(*out) + sizeof(*feat_out);
+ out_size += feats * sizeof(*entry);
+ rpc = get_prepped_command(in_size, out_size,
+ CXL_MBOX_OPCODE_GET_SUPPORTED_FEATURES);
+ if (!rpc)
+ return -ENXIO;
+
+ in = (struct fwctl_rpc_cxl *)rpc->in;
+ out = (struct fwctl_rpc_cxl_out *)rpc->out;
+ feat_in = &in->get_sup_feats_in;
+ feat_in->count = htole32(feats * sizeof(*entry));
+
+ rc = send_command(fd, rpc, out);
+ if (rc)
+ goto out;
+
+ feat_out = &out->get_sup_feats_out;
+ feats = le16toh(feat_out->supported_feats);
+ if (feats != MAX_TEST_FEATURES) {
+ fprintf(stderr, "Test device has greater than %u test
features.\n",
+ MAX_TEST_FEATURES);
+ rc = -ENXIO;
+ goto out;
+ }
+
+ if (le16toh(feat_out->num_entries) != MAX_TEST_FEATURES) {
+ fprintf(stderr, "Test device did not return expected entries.
%u\n",
+ le16toh(feat_out->num_entries));
+ rc = -ENXIO;
+ goto out;
+ }
+
+ entry = &feat_out->ents[0];
+ if (uuid_compare(test_uuid, entry->uuid) != 0) {
+ fprintf(stderr, "Test device did not export expected test
feature.\n");
+ rc = -ENXIO;
+ goto out;
+ }
+
+ if (le16toh(entry->get_feat_size) != GET_FEAT_SIZE ||
+ le16toh(entry->set_feat_size) != SET_FEAT_SIZE) {
+ fprintf(stderr, "Test device feature in/out size incorrect.\n");
+ rc = -ENXIO;
+ goto out;
+ }
+
+ if (le16toh(entry->effects) != EFFECTS_MASK) {
+ fprintf(stderr, "Test device set effects incorrect\n");
+ rc = -ENXIO;
+ goto out;
+ }
+
+ uuid_copy(feat_ctx->uuid, entry->uuid);
+ feat_ctx->get_size = le16toh(entry->get_feat_size);
+ feat_ctx->set_size = le16toh(entry->set_feat_size);
+
+out:
+ free_rpc(rpc);
+ return rc;
+}
+
+static int test_fwctl_features(struct cxl_memdev *memdev)
+{
+ struct test_feature feat_ctx;
+ unsigned int major, minor;
+ struct cxl_fwctl *fwctl;
+ int fd, rc;
+ char path[256];
+
+ fwctl = cxl_memdev_get_fwctl(memdev);
+ if (!fwctl)
+ return -ENODEV;
+
+ major = cxl_fwctl_get_major(fwctl);
+ minor = cxl_fwctl_get_minor(fwctl);
+
+ if (!major && !minor)
+ return -ENODEV;
+
+ sprintf(path, "/dev/char/%d:%d", major, minor);
+
+ fd = open(path, O_RDONLY, 0644);
+ if (fd < 0) {
+ fprintf(stderr, "Failed to open: %d\n", -errno);
+ return -errno;
+ }
+
+ rc = cxl_fwctl_rpc_get_supported_features(fd, &feat_ctx);
+ if (rc) {
+ fprintf(stderr, "Failed ioctl to get supported features: %d\n",
rc);
+ goto out;
+ }
+
+ rc = cxl_fwctl_rpc_get_test_feature(fd, &feat_ctx, DEFAULT_TEST_DATA);
+ if (rc) {
+ fprintf(stderr, "Failed ioctl to get feature: %d\n", rc);
+ goto out;
+ }
+
+ rc = cxl_fwctl_rpc_set_test_feature(fd, &feat_ctx);
+ if (rc) {
+ fprintf(stderr, "Failed ioctl to set feature: %d\n", rc);
+ goto out;
+ }
+
+out:
+ close(fd);
+ return rc;
+}
+
+static int test_fwctl(struct cxl_ctx *ctx, struct cxl_bus *bus)
+{
+ struct cxl_memdev *memdev;
+
+ cxl_memdev_foreach(ctx, memdev) {
+ if (cxl_memdev_get_bus(memdev) != bus)
+ continue;
+ return test_fwctl_features(memdev);
+ }
+
+ return 0;
+}
+
+int main(int argc, char *argv[])
+{
+ struct cxl_ctx *ctx;
+ struct cxl_bus *bus;
+ int rc;
+
+ rc = cxl_new(&ctx);
+ if (rc < 0)
+ return rc;
+
+ cxl_set_log_priority(ctx, LOG_DEBUG);
+
+ bus = cxl_bus_get_by_provider(ctx, provider);
+ if (!bus) {
+ fprintf(stderr, "%s: unable to find bus (%s)\n",
+ argv[0], provider);
+ rc = -EINVAL;
+ goto out;
+ }
+
+ rc = test_fwctl(ctx, bus);
+
+out:
+ cxl_unref(ctx);
+ return rc;
+}
diff --git a/test/meson.build b/test/meson.build
index 2fd7df5211dd..93b1d78671ef 100644
--- a/test/meson.build
+++ b/test/meson.build
@@ -17,6 +17,13 @@ ndctl_deps = libndctl_deps + [
versiondep,
]
+libcxl_deps = [
+ cxl_dep,
+ ndctl_dep,
+ uuid,
+ kmod,
+]
+
libndctl = executable('libndctl', testcore + [ 'libndctl.c'],
dependencies : libndctl_deps,
include_directories : root_inc,
@@ -235,6 +242,18 @@ if get_option('keyutils').enabled()
]
endif
+uuid_dep = dependency('uuid', required: false)
+if get_option('fwctl').enabled() and uuid_dep.found()
+ fwctl = executable('fwctl', 'fwctl.c',
+ dependencies : libcxl_deps,
+ include_directories : root_inc,
+ )
+ cxl_features = find_program('cxl-features.sh')
+ tests += [
+ [ 'cxl-features.sh', cxl_features, 'cxl' ],
+ ]
+endif
+
foreach t : tests
test(t[0], t[1],
is_parallel : false,
--
2.49.0
