tests: Add unit test to run init/shutdown for mec1308.c, ene_lpc.c

This patch includes mocks for io operations in hwaccess_x86_io.h
because those are needed to test lifecycle of mec1308.c and
ene_lpc.c

BUG=b:181803212
TEST=builds and ninja test

Change-Id: I3af612defe1af3850dfc1626a208d873e3a3eddc
Signed-off-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/51487
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

hwaccess_x86_io_unittest.h

@@ -0,0 +1,52 @@
+/*
+ * This file is part of the flashrom project.
+ *
+ * Copyright 2021 Google LLC
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program 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 General Public License for more details.
+ */
+
+/*
+ * This header is used instead of hwaccess_x86_io.h for unit tests
+ * (see flashrom_test_dep in meson.build).
+ *
+ * There is no hardware in unit test environment and all hardware operations
+ * need to be mocked.
+ */
+
+/*
+ * The same guard is used intentionally for hwaccess_x86_io.h and
+ * hwaccess_x86_io_unittest.h. When build is made for the test environment,
+ * hwaccess_x86_io_unittest.h is included first, and it effectively
+ * replaces hwaccess_x86_io.h.
+ */
+#ifndef __HWACCESS_X86_IO_H__
+#define __HWACCESS_X86_IO_H__ 1
+
+#define OUTB(v, p) test_outb(v, p)
+#define OUTW(v, p) test_outw(v, p)
+#define OUTL(v, p) test_outl(v, p)
+#define INB(p) test_inb(p)
+#define INW(p) test_inw(p)
+#define INL(p) test_inl(p)
+
+#include <stdint.h>
+#include <sys/io.h>
+
+/* All functions below are mocked in unit tests. */
+
+void test_outb(uint8_t value, uint16_t port);
+uint8_t test_inb(uint16_t port);
+void test_outw(uint16_t value, uint16_t port);
+uint16_t test_inw(uint16_t port);
+void test_outl(uint32_t value, uint16_t port);
+uint32_t test_inl(uint16_t port);
+
+#endif /* !__HWACCESS_X86_IO_H__ */

meson.build

@@ -476,6 +476,7 @@ flashrom_test_dep = declare_dependency(
   compile_args : [
     '-includestdlib.h',
     '-includeunittest_env.h',
+    '-includehwaccess_x86_io_unittest.h'
   ],
   dependencies : [
     deps,

tests/init_shutdown.c

@@ -16,6 +16,7 @@
 #include <include/test.h>
 #include <string.h>
 
+#include "io_mock.h"
 #include "programmer.h"
 
 static void run_lifecycle(void **state, enum programmer prog, const char *param)
@@ -36,6 +37,105 @@ void dummy_init_and_shutdown_test_success(void **state)
 	run_lifecycle(state, PROGRAMMER_DUMMY, "bus=parallel+lpc+fwh+spi");
 }
 
+struct mec1308_io_state {
+	unsigned char outb_val;
+};
+
+void mec1308_outb(void *state, unsigned char value, unsigned short port)
+{
+	struct mec1308_io_state *io_state = state;
+
+	io_state->outb_val = value;
+}
+
+unsigned char mec1308_inb(void *state, unsigned short port)
+{
+	struct mec1308_io_state *io_state = state;
+
+	return ((port == 0x2e /* MEC1308_SIO_PORT1 */
+			|| port == 0x4e /* MEC1308_SIO_PORT2 */)
+		? 0x20 /* MEC1308_DEVICE_ID_REG */
+		: ((io_state->outb_val == 0x84 /* MEC1308_MBX_DATA_START */)
+			? 0xaa /* MEC1308_CMD_PASSTHRU_SUCCESS */
+			: 0));
+}
+
+void mec1308_init_and_shutdown_test_success(void **state)
+{
+	struct mec1308_io_state mec1308_io_state = { 0 };
+	const struct io_mock mec1308_io = {
+		.state		= &mec1308_io_state,
+		.outb		= mec1308_outb,
+		.inb		= mec1308_inb,
+	};
+
+	io_mock_register(&mec1308_io);
+
+	will_return_always(__wrap_sio_read, 0x4d); /* MEC1308_DEVICE_ID_VAL */
+	run_lifecycle(state, PROGRAMMER_MEC1308, "");
+
+	io_mock_register(NULL);
+}
+
+struct ene_lpc_io_state {
+	unsigned char outb_val;
+	int pause_cmd;
+};
+
+void ene_lpc_outb_kb932(void *state, unsigned char value, unsigned short port)
+{
+	struct ene_lpc_io_state *io_state = state;
+
+	io_state->outb_val = value;
+	if (value == 0x59 /* ENE_KB932.ec_pause_cmd */)
+		io_state->pause_cmd = 1;
+}
+
+unsigned char ene_lpc_inb_kb932(void *state, unsigned short port)
+{
+	struct ene_lpc_io_state *io_state = state;
+	unsigned char ene_hwver_offset = 0; /* REG_EC_HWVER & 0xff */
+	unsigned char ene_ediid_offset = 0x24; /* REG_EC_EDIID & 0xff */
+	unsigned char ec_status_buf_offset = 0x54; /* ENE_KB932.ec_status_buf & 0xff */
+
+	if (port == 0xfd63 /* ENE_KB932.port_io_base + port_ene_data  */) {
+		if (io_state->outb_val == ene_hwver_offset)
+			return 0xa2; /* ENE_KB932.hwver */
+		if (io_state->outb_val == ene_ediid_offset)
+			return 0x02; /* ENE_KB932.ediid */
+		if (io_state->outb_val == ec_status_buf_offset) {
+			if (io_state->pause_cmd == 1) {
+				io_state->pause_cmd = 0;
+				return 0x33; /* ENE_KB932.ec_is_pausing mask */
+			} else {
+				return 0x00; /* ENE_KB932.ec_is_running mask */
+			}
+		}
+	}
+
+	return 0;
+}
+
+void ene_lpc_init_and_shutdown_test_success(void **state)
+{
+	/*
+	 * Current implementation tests for chip ENE_KB932.
+	 * Another chip which is not tested here is ENE_KB94X.
+	 */
+	struct ene_lpc_io_state ene_lpc_io_state = { 0, 0 };
+	const struct io_mock ene_lpc_io = {
+		.state		= &ene_lpc_io_state,
+		.outb		= ene_lpc_outb_kb932,
+		.inb		= ene_lpc_inb_kb932,
+	};
+
+	io_mock_register(&ene_lpc_io);
+
+	run_lifecycle(state, PROGRAMMER_ENE_LPC, "");
+
+	io_mock_register(NULL);
+}
+
 void linux_spi_init_and_shutdown_test_success(void **state)
 {
 	/*

tests/io_mock.h

@@ -32,16 +32,16 @@
 #define _IO_MOCK_H_
 
 struct io_mock {
-	void *priv;
+	void *state;
 
-	void (*outb)(void *priv, unsigned char value, unsigned short port);
-	unsigned char (*inb)(void *priv, unsigned short port);
+	void (*outb)(void *state, unsigned char value, unsigned short port);
+	unsigned char (*inb)(void *state, unsigned short port);
 
-	void (*outw)(void *priv, unsigned short value, unsigned short port);
-	unsigned short (*inw)(void *priv, unsigned short port);
+	void (*outw)(void *state, unsigned short value, unsigned short port);
+	unsigned short (*inw)(void *state, unsigned short port);
 
-	void (*outl)(void *priv, unsigned int value, unsigned short port);
-	unsigned int (*inl)(void *priv, unsigned short port);
+	void (*outl)(void *state, unsigned int value, unsigned short port);
+	unsigned int (*inl)(void *state, unsigned short port);
 };
 
 void io_mock_register(const struct io_mock *io);

tests/meson.build

@@ -32,6 +32,13 @@ mocks = [
   '-Wl,--wrap=ioctl',
   '-Wl,--wrap=fopen',
   '-Wl,--wrap=fopen64',
+  '-Wl,--wrap=rget_io_perms',
+  '-Wl,--wrap=test_outb',
+  '-Wl,--wrap=test_inb',
+  '-Wl,--wrap=test_outw',
+  '-Wl,--wrap=test_inw',
+  '-Wl,--wrap=test_outl',
+  '-Wl,--wrap=test_inl',
   '-Wl,--gc-sections',
 ]
 

tests/tests.c

@@ -14,6 +14,7 @@
  */
 
 #include <include/test.h>
+#include "io_mock.h"
 #include "tests.h"
 
 #include <stdio.h>
@@ -22,6 +23,13 @@
 /* redefinitions/wrapping */
 #define LOG_ME printf("%s is called\n", __func__)
 
+static const struct io_mock *current_io = NULL;
+
+void io_mock_register(const struct io_mock *io)
+{
+	current_io = io;
+}
+
 void __wrap_physunmap(void *virt_addr, size_t len)
 {
 	LOG_ME;
@@ -74,6 +82,51 @@ FILE *__wrap_fopen64(const char *pathname, const char *mode)
 	return NULL;
 }
 
+int __wrap_rget_io_perms(void)
+{
+	LOG_ME;
+	return 0;
+}
+
+void __wrap_test_outb(unsigned char value, unsigned short port) {
+	/* LOG_ME; */
+	if (current_io && current_io->outb)
+		current_io->outb(current_io->state, value, port);
+}
+
+unsigned char __wrap_test_inb(unsigned short port) {
+	/* LOG_ME; */
+	if (current_io && current_io->inb)
+		return current_io->inb(current_io->state, port);
+	return 0;
+}
+
+void __wrap_test_outw(unsigned short value, unsigned short port) {
+	/* LOG_ME; */
+	if (current_io && current_io->outw)
+		current_io->outw(current_io->state, value, port);
+}
+
+unsigned short __wrap_test_inw(unsigned short port) {
+	/* LOG_ME; */
+	if (current_io && current_io->inw)
+		return current_io->inw(current_io->state, port);
+	return 0;
+}
+
+void __wrap_test_outl(unsigned int value, unsigned short port) {
+	/* LOG_ME; */
+	if (current_io && current_io->outl)
+		current_io->outl(current_io->state, value, port);
+}
+
+unsigned int __wrap_test_inl(unsigned short port) {
+	/* LOG_ME; */
+	if (current_io && current_io->inl)
+		return current_io->inl(current_io->state, port);
+	return 0;
+}
+
 int main(void)
 {
 	int ret = 0;
@@ -112,6 +165,8 @@ int main(void)
 
 	const struct CMUnitTest init_shutdown_tests[] = {
 		cmocka_unit_test(dummy_init_and_shutdown_test_success),
+		cmocka_unit_test(mec1308_init_and_shutdown_test_success),
+		cmocka_unit_test(ene_lpc_init_and_shutdown_test_success),
 		cmocka_unit_test(linux_spi_init_and_shutdown_test_success),
 	};
 	ret |= cmocka_run_group_tests_name("init_shutdown.c tests", init_shutdown_tests, NULL, NULL);

tests/tests.h

@@ -42,6 +42,8 @@ void probe_spi_st95_test_success(void **state); /* spi95.c */
 
 /* init_shutdown.c */
 void dummy_init_and_shutdown_test_success(void **state);
+void mec1308_init_and_shutdown_test_success(void **state);
+void ene_lpc_init_and_shutdown_test_success(void **state);
 void linux_spi_init_and_shutdown_test_success(void **state);
 
 #endif /* TESTS_H */