--- /dev/null
+// SPDX-License-Identifier: BSD-3-Clause
+/* Copyright (C) 2022 Microchip Technology Inc. and its subsidiaries.
+ * Microchip VCAP API kunit test suite
+ */
+
+#include <kunit/test.h>
+#include "vcap_api.h"
+#include "vcap_api_client.h"
+#include "vcap_api_debugfs.h"
+#include "vcap_model_kunit.h"
+
+/* First we have the test infrastructure that emulates the platform
+ * implementation
+ */
+#define TEST_BUF_CNT 100
+#define TEST_BUF_SZ 350
+#define STREAMWSIZE 64
+
+static u32 test_updateaddr[STREAMWSIZE] = {};
+static int test_updateaddridx;
+static int test_cache_erase_count;
+static u32 test_init_start;
+static u32 test_init_count;
+static u32 test_hw_counter_id;
+static struct vcap_cache_data test_hw_cache;
+static struct net_device test_netdev = {};
+static int test_move_addr;
+static int test_move_offset;
+static int test_move_count;
+static char test_pr_buffer[TEST_BUF_CNT][TEST_BUF_SZ];
+static int test_pr_bufferidx;
+static int test_pr_idx;
+
+/* Callback used by the VCAP API */
+static enum vcap_keyfield_set test_val_keyset(struct net_device *ndev,
+ struct vcap_admin *admin,
+ struct vcap_rule *rule,
+ struct vcap_keyset_list *kslist,
+ u16 l3_proto)
+{
+ int idx;
+
+ if (kslist->cnt > 0) {
+ switch (admin->vtype) {
+ case VCAP_TYPE_IS0:
+ for (idx = 0; idx < kslist->cnt; idx++) {
+ if (kslist->keysets[idx] == VCAP_KFS_ETAG)
+ return kslist->keysets[idx];
+ if (kslist->keysets[idx] ==
+ VCAP_KFS_PURE_5TUPLE_IP4)
+ return kslist->keysets[idx];
+ if (kslist->keysets[idx] ==
+ VCAP_KFS_NORMAL_5TUPLE_IP4)
+ return kslist->keysets[idx];
+ if (kslist->keysets[idx] ==
+ VCAP_KFS_NORMAL_7TUPLE)
+ return kslist->keysets[idx];
+ }
+ break;
+ case VCAP_TYPE_IS2:
+ for (idx = 0; idx < kslist->cnt; idx++) {
+ if (kslist->keysets[idx] == VCAP_KFS_MAC_ETYPE)
+ return kslist->keysets[idx];
+ if (kslist->keysets[idx] == VCAP_KFS_ARP)
+ return kslist->keysets[idx];
+ if (kslist->keysets[idx] == VCAP_KFS_IP_7TUPLE)
+ return kslist->keysets[idx];
+ }
+ break;
+ default:
+ pr_info("%s:%d: no validation for VCAP %d\n",
+ __func__, __LINE__, admin->vtype);
+ break;
+ }
+ }
+ return -EINVAL;
+}
+
+/* Callback used by the VCAP API */
+static void test_add_def_fields(struct net_device *ndev,
+ struct vcap_admin *admin,
+ struct vcap_rule *rule)
+{
+ if (admin->vinst == 0 || admin->vinst == 2)
+ vcap_rule_add_key_bit(rule, VCAP_KF_LOOKUP_FIRST_IS,
+ VCAP_BIT_1);
+ else
+ vcap_rule_add_key_bit(rule, VCAP_KF_LOOKUP_FIRST_IS,
+ VCAP_BIT_0);
+}
+
+/* Callback used by the VCAP API */
+static void test_cache_erase(struct vcap_admin *admin)
+{
+ if (test_cache_erase_count) {
+ memset(admin->cache.keystream, 0, test_cache_erase_count);
+ memset(admin->cache.maskstream, 0, test_cache_erase_count);
+ memset(admin->cache.actionstream, 0, test_cache_erase_count);
+ test_cache_erase_count = 0;
+ }
+}
+
+/* Callback used by the VCAP API */
+static void test_cache_init(struct net_device *ndev, struct vcap_admin *admin,
+ u32 start, u32 count)
+{
+ test_init_start = start;
+ test_init_count = count;
+}
+
+/* Callback used by the VCAP API */
+static void test_cache_read(struct net_device *ndev, struct vcap_admin *admin,
+ enum vcap_selection sel, u32 start, u32 count)
+{
+ u32 *keystr, *mskstr, *actstr;
+ int idx;
+
+ pr_debug("%s:%d: %d %d\n", __func__, __LINE__, start, count);
+ switch (sel) {
+ case VCAP_SEL_ENTRY:
+ keystr = &admin->cache.keystream[start];
+ mskstr = &admin->cache.maskstream[start];
+ for (idx = 0; idx < count; ++idx) {
+ pr_debug("%s:%d: keydata[%02d]: 0x%08x\n", __func__,
+ __LINE__, start + idx, keystr[idx]);
+ }
+ for (idx = 0; idx < count; ++idx) {
+ /* Invert the mask before decoding starts */
+ mskstr[idx] = ~mskstr[idx];
+ pr_debug("%s:%d: mskdata[%02d]: 0x%08x\n", __func__,
+ __LINE__, start + idx, mskstr[idx]);
+ }
+ break;
+ case VCAP_SEL_ACTION:
+ actstr = &admin->cache.actionstream[start];
+ for (idx = 0; idx < count; ++idx) {
+ pr_debug("%s:%d: actdata[%02d]: 0x%08x\n", __func__,
+ __LINE__, start + idx, actstr[idx]);
+ }
+ break;
+ case VCAP_SEL_COUNTER:
+ pr_debug("%s:%d\n", __func__, __LINE__);
+ test_hw_counter_id = start;
+ admin->cache.counter = test_hw_cache.counter;
+ admin->cache.sticky = test_hw_cache.sticky;
+ break;
+ case VCAP_SEL_ALL:
+ pr_debug("%s:%d\n", __func__, __LINE__);
+ break;
+ }
+}
+
+/* Callback used by the VCAP API */
+static void test_cache_write(struct net_device *ndev, struct vcap_admin *admin,
+ enum vcap_selection sel, u32 start, u32 count)
+{
+ u32 *keystr, *mskstr, *actstr;
+ int idx;
+
+ switch (sel) {
+ case VCAP_SEL_ENTRY:
+ keystr = &admin->cache.keystream[start];
+ mskstr = &admin->cache.maskstream[start];
+ for (idx = 0; idx < count; ++idx) {
+ pr_debug("%s:%d: keydata[%02d]: 0x%08x\n", __func__,
+ __LINE__, start + idx, keystr[idx]);
+ }
+ for (idx = 0; idx < count; ++idx) {
+ /* Invert the mask before encoding starts */
+ mskstr[idx] = ~mskstr[idx];
+ pr_debug("%s:%d: mskdata[%02d]: 0x%08x\n", __func__,
+ __LINE__, start + idx, mskstr[idx]);
+ }
+ break;
+ case VCAP_SEL_ACTION:
+ actstr = &admin->cache.actionstream[start];
+ for (idx = 0; idx < count; ++idx) {
+ pr_debug("%s:%d: actdata[%02d]: 0x%08x\n", __func__,
+ __LINE__, start + idx, actstr[idx]);
+ }
+ break;
+ case VCAP_SEL_COUNTER:
+ pr_debug("%s:%d\n", __func__, __LINE__);
+ test_hw_counter_id = start;
+ test_hw_cache.counter = admin->cache.counter;
+ test_hw_cache.sticky = admin->cache.sticky;
+ break;
+ case VCAP_SEL_ALL:
+ pr_err("%s:%d: cannot write all streams at once\n",
+ __func__, __LINE__);
+ break;
+ }
+}
+
+/* Callback used by the VCAP API */
+static void test_cache_update(struct net_device *ndev, struct vcap_admin *admin,
+ enum vcap_command cmd,
+ enum vcap_selection sel, u32 addr)
+{
+ if (test_updateaddridx < ARRAY_SIZE(test_updateaddr))
+ test_updateaddr[test_updateaddridx] = addr;
+ else
+ pr_err("%s:%d: overflow: %d\n", __func__, __LINE__,
+ test_updateaddridx);
+ test_updateaddridx++;
+}
+
+static void test_cache_move(struct net_device *ndev, struct vcap_admin *admin,
+ u32 addr, int offset, int count)
+{
+ test_move_addr = addr;
+ test_move_offset = offset;
+ test_move_count = count;
+}
+
+/* Provide port information via a callback interface */
+static int vcap_test_port_info(struct net_device *ndev,
+ struct vcap_admin *admin,
+ struct vcap_output_print *out)
+{
+ return 0;
+}
+
+static int vcap_test_enable(struct net_device *ndev,
+ struct vcap_admin *admin,
+ bool enable)
+{
+ return 0;
+}
+
+static struct vcap_operations test_callbacks = {
+ .validate_keyset = test_val_keyset,
+ .add_default_fields = test_add_def_fields,
+ .cache_erase = test_cache_erase,
+ .cache_write = test_cache_write,
+ .cache_read = test_cache_read,
+ .init = test_cache_init,
+ .update = test_cache_update,
+ .move = test_cache_move,
+ .port_info = vcap_test_port_info,
+ .enable = vcap_test_enable,
+};
+
+static struct vcap_control test_vctrl = {
+ .vcaps = kunit_test_vcaps,
+ .stats = &kunit_test_vcap_stats,
+ .ops = &test_callbacks,
+};
+
+static void vcap_test_api_init(struct vcap_admin *admin)
+{
+ /* Initialize the shared objects */
+ INIT_LIST_HEAD(&test_vctrl.list);
+ INIT_LIST_HEAD(&admin->list);
+ INIT_LIST_HEAD(&admin->rules);
+ list_add_tail(&admin->list, &test_vctrl.list);
+ memset(test_updateaddr, 0, sizeof(test_updateaddr));
+ test_updateaddridx = 0;
+ test_pr_bufferidx = 0;
+ test_pr_idx = 0;
+}
+
+/* callback used by the show_admin function */
+static __printf(2, 3)
+int test_prf(void *out, const char *fmt, ...)
+{
+ static char test_buffer[TEST_BUF_SZ];
+ va_list args;
+ int idx, cnt;
+
+ if (test_pr_bufferidx >= TEST_BUF_CNT) {
+ pr_err("%s:%d: overflow: %d\n", __func__, __LINE__,
+ test_pr_bufferidx);
+ return 0;
+ }
+
+ va_start(args, fmt);
+ cnt = vscnprintf(test_buffer, TEST_BUF_SZ, fmt, args);
+ va_end(args);
+
+ for (idx = 0; idx < cnt; ++idx) {
+ test_pr_buffer[test_pr_bufferidx][test_pr_idx] =
+ test_buffer[idx];
+ if (test_buffer[idx] == '\n') {
+ test_pr_buffer[test_pr_bufferidx][++test_pr_idx] = 0;
+ test_pr_idx = 0;
+ test_pr_bufferidx++;
+ } else {
+ ++test_pr_idx;
+ }
+ }
+
+ return cnt;
+}
+
+/* Define the test cases. */
+
+static void vcap_api_addr_keyset_test(struct kunit *test)
+{
+ u32 keydata[12] = {
+ 0x40450042, 0x000feaf3, 0x00000003, 0x00050600,
+ 0x10203040, 0x00075880, 0x633c6864, 0x00040003,
+ 0x00000020, 0x00000008, 0x00000240, 0x00000000,
+ };
+ u32 mskdata[12] = {
+ 0x0030ff80, 0xfff00000, 0xfffffffc, 0xfff000ff,
+ 0x00000000, 0xfff00000, 0x00000000, 0xfff3fffc,
+ 0xffffffc0, 0xffffffff, 0xfffffc03, 0xffffffff,
+ };
+ u32 actdata[12] = {};
+ struct vcap_admin admin = {
+ .vtype = VCAP_TYPE_IS2,
+ .cache = {
+ .keystream = keydata,
+ .maskstream = mskdata,
+ .actionstream = actdata,
+ },
+ };
+ int ret, idx, addr;
+
+ vcap_test_api_init(&admin);
+
+ /* Go from higher to lower addresses searching for a keyset */
+ for (idx = ARRAY_SIZE(keydata) - 1, addr = 799; idx > 0;
+ --idx, --addr) {
+ admin.cache.keystream = &keydata[idx];
+ admin.cache.maskstream = &mskdata[idx];
+ ret = vcap_addr_keyset(&test_vctrl, &test_netdev, &admin, addr);
+ KUNIT_EXPECT_EQ(test, -EINVAL, ret);
+ }
+
+ /* Finally we hit the start of the rule */
+ admin.cache.keystream = &keydata[idx];
+ admin.cache.maskstream = &mskdata[idx];
+ ret = vcap_addr_keyset(&test_vctrl, &test_netdev, &admin, addr);
+ KUNIT_EXPECT_EQ(test, VCAP_KFS_MAC_ETYPE, ret);
+}
+
+static void vcap_api_show_admin_raw_test(struct kunit *test)
+{
+ u32 keydata[4] = {
+ 0x40450042, 0x000feaf3, 0x00000003, 0x00050600,
+ };
+ u32 mskdata[4] = {
+ 0x0030ff80, 0xfff00000, 0xfffffffc, 0xfff000ff,
+ };
+ u32 actdata[12] = {};
+ struct vcap_admin admin = {
+ .vtype = VCAP_TYPE_IS2,
+ .cache = {
+ .keystream = keydata,
+ .maskstream = mskdata,
+ .actionstream = actdata,
+ },
+ .first_valid_addr = 786,
+ .last_valid_addr = 788,
+ };
+ struct vcap_rule_internal ri = {
+ .ndev = &test_netdev,
+ };
+ struct vcap_output_print out = {
+ .prf = (void *)test_prf,
+ };
+ const char *test_expected =
+ " addr: 786, X6 rule, keyset: VCAP_KFS_MAC_ETYPE\n";
+ int ret;
+
+ vcap_test_api_init(&admin);
+ list_add_tail(&ri.list, &admin.rules);
+
+ ret = vcap_show_admin_raw(&test_vctrl, &admin, &out);
+ KUNIT_EXPECT_EQ(test, 0, ret);
+ KUNIT_EXPECT_STREQ(test, test_expected, test_pr_buffer[0]);
+}
+
+static const char * const test_admin_info_expect[] = {
+ "name: is2\n",
+ "rows: 256\n",
+ "sw_count: 12\n",
+ "sw_width: 52\n",
+ "sticky_width: 1\n",
+ "act_width: 110\n",
+ "default_cnt: 73\n",
+ "require_cnt_dis: 0\n",
+ "version: 1\n",
+ "vtype: 2\n",
+ "vinst: 0\n",
+ "first_cid: 10000\n",
+ "last_cid: 19999\n",
+ "lookups: 4\n",
+ "first_valid_addr: 0\n",
+ "last_valid_addr: 3071\n",
+ "last_used_addr: 794\n",
+};
+
+static void vcap_api_show_admin_test(struct kunit *test)
+{
+ struct vcap_admin admin = {
+ .vtype = VCAP_TYPE_IS2,
+ .first_cid = 10000,
+ .last_cid = 19999,
+ .lookups = 4,
+ .last_valid_addr = 3071,
+ .first_valid_addr = 0,
+ .last_used_addr = 794,
+ };
+ struct vcap_output_print out = {
+ .prf = (void *)test_prf,
+ };
+ int idx;
+
+ vcap_test_api_init(&admin);
+
+ vcap_show_admin_info(&test_vctrl, &admin, &out);
+ for (idx = 0; idx < test_pr_bufferidx; ++idx) {
+ /* pr_info("log[%02d]: %s", idx, test_pr_buffer[idx]); */
+ KUNIT_EXPECT_STREQ(test, test_admin_info_expect[idx],
+ test_pr_buffer[idx]);
+ }
+}
+
+static const char * const test_admin_expect[] = {
+ "name: is2\n",
+ "rows: 256\n",
+ "sw_count: 12\n",
+ "sw_width: 52\n",
+ "sticky_width: 1\n",
+ "act_width: 110\n",
+ "default_cnt: 73\n",
+ "require_cnt_dis: 0\n",
+ "version: 1\n",
+ "vtype: 2\n",
+ "vinst: 0\n",
+ "first_cid: 8000000\n",
+ "last_cid: 8199999\n",
+ "lookups: 4\n",
+ "first_valid_addr: 0\n",
+ "last_valid_addr: 3071\n",
+ "last_used_addr: 794\n",
+ "\n",
+ "rule: 100, addr: [794,799], X6, ctr[0]: 0, hit: 0\n",
+ " chain_id: 0\n",
+ " user: 0\n",
+ " priority: 0\n",
+ " keyset: VCAP_KFS_MAC_ETYPE\n",
+ " keyset_sw: 6\n",
+ " keyset_sw_regs: 2\n",
+ " ETYPE_LEN_IS: W1: 1/1\n",
+ " IF_IGR_PORT_MASK: W32: 0xffabcd01/0xffffffff\n",
+ " IF_IGR_PORT_MASK_RNG: W4: 5/15\n",
+ " L2_DMAC: W48: 01:02:03:04:05:06/ff:ff:ff:ff:ff:ff\n",
+ " L2_PAYLOAD_ETYPE: W64: 0x9000002000000081/0xff000000000000ff\n",
+ " L2_SMAC: W48: b1:9e:34:32:75:88/ff:ff:ff:ff:ff:ff\n",
+ " LOOKUP_FIRST_IS: W1: 1/1\n",
+ " TYPE: W4: 0/15\n",
+ " actionset: VCAP_AFS_BASE_TYPE\n",
+ " actionset_sw: 3\n",
+ " actionset_sw_regs: 4\n",
+ " CNT_ID: W12: 100\n",
+ " MATCH_ID: W16: 1\n",
+ " MATCH_ID_MASK: W16: 1\n",
+ " POLICE_ENA: W1: 1\n",
+ " PORT_MASK: W68: 0x0514670115f3324589\n",
+};
+
+static void vcap_api_show_admin_rule_test(struct kunit *test)
+{
+ u32 keydata[] = {
+ 0x40450042, 0x000feaf3, 0x00000003, 0x00050600,
+ 0x10203040, 0x00075880, 0x633c6864, 0x00040003,
+ 0x00000020, 0x00000008, 0x00000240, 0x00000000,
+ };
+ u32 mskdata[] = {
+ 0x0030ff80, 0xfff00000, 0xfffffffc, 0xfff000ff,
+ 0x00000000, 0xfff00000, 0x00000000, 0xfff3fffc,
+ 0xffffffc0, 0xffffffff, 0xfffffc03, 0xffffffff,
+ };
+ u32 actdata[] = {
+ 0x00040002, 0xf3324589, 0x14670115, 0x00000005,
+ 0x00000000, 0x00100000, 0x06400010, 0x00000000,
+ 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+ 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+ 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+ 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+ };
+ struct vcap_admin admin = {
+ .vtype = VCAP_TYPE_IS2,
+ .first_cid = 8000000,
+ .last_cid = 8199999,
+ .lookups = 4,
+ .last_valid_addr = 3071,
+ .first_valid_addr = 0,
+ .last_used_addr = 794,
+ .cache = {
+ .keystream = keydata,
+ .maskstream = mskdata,
+ .actionstream = actdata,
+ },
+ };
+ struct vcap_rule_internal ri = {
+ .admin = &admin,
+ .data = {
+ .id = 100,
+ .keyset = VCAP_KFS_MAC_ETYPE,
+ .actionset = VCAP_AFS_BASE_TYPE,
+ },
+ .size = 6,
+ .keyset_sw = 6,
+ .keyset_sw_regs = 2,
+ .actionset_sw = 3,
+ .actionset_sw_regs = 4,
+ .addr = 794,
+ .vctrl = &test_vctrl,
+ };
+ struct vcap_output_print out = {
+ .prf = (void *)test_prf,
+ };
+ int ret, idx;
+
+ vcap_test_api_init(&admin);
+ list_add_tail(&ri.list, &admin.rules);
+
+ ret = vcap_show_admin(&test_vctrl, &admin, &out);
+ KUNIT_EXPECT_EQ(test, 0, ret);
+ for (idx = 0; idx < test_pr_bufferidx; ++idx) {
+ /* pr_info("log[%02d]: %s", idx, test_pr_buffer[idx]); */
+ KUNIT_EXPECT_STREQ(test, test_admin_expect[idx],
+ test_pr_buffer[idx]);
+ }
+}
+
+static struct kunit_case vcap_api_debugfs_test_cases[] = {
+ KUNIT_CASE(vcap_api_addr_keyset_test),
+ KUNIT_CASE(vcap_api_show_admin_raw_test),
+ KUNIT_CASE(vcap_api_show_admin_test),
+ KUNIT_CASE(vcap_api_show_admin_rule_test),
+ {}
+};
+
+static struct kunit_suite vcap_api_debugfs_test_suite = {
+ .name = "VCAP_API_DebugFS_Testsuite",
+ .test_cases = vcap_api_debugfs_test_cases,
+};
+
+kunit_test_suite(vcap_api_debugfs_test_suite);
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