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-rw-r--r--tests/chip_wp.c325
-rw-r--r--tests/meson.build1
-rw-r--r--tests/tests.c10
-rw-r--r--tests/tests.h8
4 files changed, 344 insertions, 0 deletions
diff --git a/tests/chip_wp.c b/tests/chip_wp.c
new file mode 100644
index 00000000..8b209bd3
--- /dev/null
+++ b/tests/chip_wp.c
@@ -0,0 +1,325 @@
+/*
+ * This file is part of the flashrom project.
+ *
+ * Copyright (C) 2021 3mdeb Embedded Systems Consulting
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ */
+
+#include <include/test.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "chipdrivers.h"
+#include "flash.h"
+#include "libflashrom.h"
+#include "programmer.h"
+#include "tests.h"
+
+/*
+ * Tests in this file do not use any mocking, because using write-protect
+ * emulation in dummyflasher programmer is sufficient
+ */
+
+#define LAYOUT_TAIL_REGION_START 0x1000
+
+static void setup_chip(struct flashrom_flashctx *flash, struct flashrom_layout **layout,
+ struct flashchip *chip, const char *programmer_param)
+{
+ flash->chip = chip;
+
+ if (layout) {
+ const size_t tail_start = LAYOUT_TAIL_REGION_START;
+ const size_t tail_len = chip->total_size * KiB - 1;
+
+ assert_int_equal(0, flashrom_layout_new(layout));
+ assert_int_equal(0, flashrom_layout_add_region(*layout, 0, tail_start - 1, "head"));
+ assert_int_equal(0, flashrom_layout_add_region(*layout, tail_start, tail_len, "tail"));
+
+ flashrom_layout_set(flash, *layout);
+ }
+
+ assert_int_equal(0, programmer_init(&programmer_dummy, programmer_param));
+ /* Assignment below normally happens while probing, but this test is not probing. */
+ flash->mst = &registered_masters[0];
+}
+
+static void teardown(struct flashrom_layout **layout)
+{
+ assert_int_equal(0, programmer_shutdown());
+ if (layout)
+ flashrom_layout_release(*layout);
+}
+
+/* Setup the struct for W25Q128.V, all values come from flashchips.c */
+static const struct flashchip chip_W25Q128_V = {
+ .vendor = "aklm&dummyflasher",
+ .total_size = 16 * 1024,
+ .tested = TEST_OK_PREW,
+ .read = spi_chip_read,
+ .write = spi_chip_write_256,
+ .unlock = spi_disable_blockprotect,
+ .feature_bits = FEATURE_WRSR_WREN | FEATURE_OTP | FEATURE_WRSR2,
+ .block_erasers =
+ {
+ {
+ .eraseblocks = { {4 * 1024, 4096} },
+ .block_erase = spi_block_erase_20,
+ }, {
+ .eraseblocks = { {32 * 1024, 512} },
+ .block_erase = spi_block_erase_52,
+ }, {
+ .eraseblocks = { {64 * 1024, 256} },
+ .block_erase = spi_block_erase_d8,
+ }, {
+ .eraseblocks = { {16 * 1024 * 1024, 1} },
+ .block_erase = spi_block_erase_60,
+ }, {
+ .eraseblocks = { {16 * 1024 * 1024, 1} },
+ .block_erase = spi_block_erase_c7,
+ }
+ },
+ .reg_bits =
+ {
+ .srp = {STATUS1, 7, RW},
+ .srl = {STATUS2, 0, RW},
+ .bp = {{STATUS1, 2, RW}, {STATUS1, 3, RW}, {STATUS1, 4, RW}},
+ .tb = {STATUS1, 5, RW},
+ .sec = {STATUS1, 6, RW},
+ .cmp = {STATUS2, 6, RW},
+ .wps = {STATUS3, 2, RW},
+ },
+ .decode_range = decode_range_spi25,
+};
+
+/* Trying to set an unsupported WP range fails */
+void invalid_wp_range_dummyflasher_test_success(void **state)
+{
+ (void) state; /* unused */
+
+ char *param_dup = strdup("bus=spi,emulate=W25Q128FV,hwwp=no");
+
+ struct flashrom_flashctx flash = { 0 };
+ struct flashchip mock_chip = chip_W25Q128_V;
+ struct flashrom_wp_cfg *wp_cfg;
+
+ setup_chip(&flash, NULL, &mock_chip, param_dup);
+
+ assert_int_equal(0, flashrom_wp_cfg_new(&wp_cfg));
+ flashrom_wp_set_mode(wp_cfg, FLASHROM_WP_MODE_HARDWARE);
+ flashrom_wp_set_range(wp_cfg, 0x1000, 0x1000);
+
+ assert_int_equal(FLASHROM_WP_ERR_RANGE_UNSUPPORTED, flashrom_wp_write_cfg(&flash, wp_cfg));
+
+ teardown(NULL);
+
+ flashrom_wp_cfg_release(wp_cfg);
+ free(param_dup);
+}
+
+/* Enabling hardware WP with a valid range succeeds */
+void set_wp_range_dummyflasher_test_success(void **state)
+{
+ (void) state; /* unused */
+
+ char *param_dup = strdup("bus=spi,emulate=W25Q128FV,hwwp=no");
+
+ struct flashrom_flashctx flash = { 0 };
+ struct flashchip mock_chip = chip_W25Q128_V;
+ struct flashrom_wp_cfg *wp_cfg;
+
+ size_t start;
+ size_t len;
+
+ setup_chip(&flash, NULL, &mock_chip, param_dup);
+
+ /* Use last 4 KiB for a range. */
+ assert_int_equal(0, flashrom_wp_cfg_new(&wp_cfg));
+ flashrom_wp_set_mode(wp_cfg, FLASHROM_WP_MODE_HARDWARE);
+ flashrom_wp_set_range(wp_cfg, mock_chip.total_size * KiB - 4 * KiB, 4 * KiB);
+
+ assert_int_equal(0, flashrom_wp_write_cfg(&flash, wp_cfg));
+
+ /* Check that range was set correctly. */
+ assert_int_equal(0, flashrom_wp_read_cfg(wp_cfg, &flash));
+ flashrom_wp_get_range(&start, &len, wp_cfg);
+ assert_int_equal(16 * MiB - 4 * KiB, start);
+ assert_int_equal(4 * KiB, len);
+
+ teardown(NULL);
+
+ flashrom_wp_cfg_release(wp_cfg);
+ free(param_dup);
+}
+
+/* Enable hardware WP and verify that it can not be unset */
+void switch_wp_mode_dummyflasher_test_success(void **state)
+{
+ (void) state; /* unused */
+
+ char *param_dup = strdup("bus=spi,emulate=W25Q128FV,hwwp=yes");
+
+ struct flashrom_flashctx flash = { 0 };
+ struct flashchip mock_chip = chip_W25Q128_V;
+ struct flashrom_wp_cfg *wp_cfg;
+
+ setup_chip(&flash, NULL, &mock_chip, param_dup);
+
+ assert_int_equal(0, flashrom_wp_cfg_new(&wp_cfg));
+
+ /* Check initial mode. */
+ assert_int_equal(0, flashrom_wp_read_cfg(wp_cfg, &flash));
+ assert_int_equal(FLASHROM_WP_MODE_DISABLED, flashrom_wp_get_mode(wp_cfg));
+
+ /* Enable hardware protection, which can't be unset because simulated
+ HW WP pin is in active state. */
+ flashrom_wp_set_mode(wp_cfg, FLASHROM_WP_MODE_HARDWARE);
+ assert_int_equal(0, flashrom_wp_write_cfg(&flash, wp_cfg));
+ assert_int_equal(0, flashrom_wp_read_cfg(wp_cfg, &flash));
+ assert_int_equal(FLASHROM_WP_MODE_HARDWARE, flashrom_wp_get_mode(wp_cfg));
+
+ /* Check that write-protection mode can't be unset. */
+ flashrom_wp_set_mode(wp_cfg, FLASHROM_WP_MODE_DISABLED);
+ assert_int_equal(FLASHROM_WP_ERR_VERIFY_FAILED, flashrom_wp_write_cfg(&flash, wp_cfg));
+
+ /* Final mode should be "hardware". */
+ assert_int_equal(0, flashrom_wp_read_cfg(wp_cfg, &flash));
+ assert_int_equal(FLASHROM_WP_MODE_HARDWARE, flashrom_wp_get_mode(wp_cfg));
+
+ teardown(NULL);
+
+ flashrom_wp_cfg_release(wp_cfg);
+ free(param_dup);
+}
+
+/* WP state is decoded correctly from status registers */
+void wp_init_from_status_dummyflasher_test_success(void **state)
+{
+ (void) state; /* unused */
+
+ /*
+ * CMP (S14) = 1 (range complement)
+ * SRP1 (S8) = 1
+ * SRP0 (S7) = 1 (`SRP1 == 1 && SRP0 == 1` is permanent mode)
+ * SEC (S6) = 1 (base unit is a 4 KiB sector)
+ * TB (S5) = 1 (bottom up range)
+ * BP2 (S4) = 0
+ * BP1 (S3) = 1
+ * BP0 (S2) = 1 (bp: BP2-0 == 0b011 == 3)
+ *
+ * Range coefficient is `2 ** (bp - 1)`, which is 4 in this case.
+ * Multiplaying that by base unit gives 16 KiB protected region at the
+ * bottom (start of the chip), which is then complemented.
+ */
+ char *param_dup = strdup("bus=spi,emulate=W25Q128FV,spi_status=0x41ec");
+
+ struct flashrom_flashctx flash = { 0 };
+ struct flashchip mock_chip = chip_W25Q128_V;
+ struct flashrom_wp_cfg *wp_cfg;
+
+ size_t start;
+ size_t len;
+
+ setup_chip(&flash, NULL, &mock_chip, param_dup);
+
+ assert_int_equal(0, flashrom_wp_cfg_new(&wp_cfg));
+
+ /* Verify that WP mode reflects SPI status */
+ assert_int_equal(0, flashrom_wp_read_cfg(wp_cfg, &flash));
+ assert_int_equal(FLASHROM_WP_MODE_PERMANENT, flashrom_wp_get_mode(wp_cfg));
+ flashrom_wp_get_range(&start, &len, wp_cfg);
+ assert_int_equal(0x004000, start);
+ assert_int_equal(0xffc000, len);
+
+ teardown(NULL);
+
+ flashrom_wp_cfg_release(wp_cfg);
+ free(param_dup);
+}
+
+/* Enabled WP makes full chip erasure fail */
+void full_chip_erase_with_wp_dummyflasher_test_success(void **state)
+{
+ (void) state; /* unused */
+
+ struct flashrom_flashctx flash = { 0 };
+ struct flashrom_layout *layout;
+ struct flashchip mock_chip = chip_W25Q128_V;
+ struct flashrom_wp_cfg *wp_cfg;
+
+ char *param_dup = strdup("bus=spi,emulate=W25Q128FV,hwwp=yes");
+
+ setup_chip(&flash, &layout, &mock_chip, param_dup);
+ /* Layout regions are created by setup_chip(). */
+ assert_int_equal(0, flashrom_layout_include_region(layout, "head"));
+ assert_int_equal(0, flashrom_layout_include_region(layout, "tail"));
+
+ assert_int_equal(0, flashrom_wp_cfg_new(&wp_cfg));
+
+ /* Write protection takes effect only after changing SRP values, so at
+ this stage WP is not enabled and erase completes successfully. */
+ assert_int_equal(0, flashrom_flash_erase(&flash));
+
+ assert_int_equal(0, flashrom_wp_read_cfg(wp_cfg, &flash));
+
+ /* Hardware-protect first 4 KiB. */
+ flashrom_wp_set_range(wp_cfg, 0, 4 * KiB);
+ flashrom_wp_set_mode(wp_cfg, FLASHROM_WP_MODE_HARDWARE);
+
+ assert_int_equal(0, flashrom_wp_write_cfg(&flash, wp_cfg));
+
+ /* Try erasing the chip again. Now that WP is active, the first 4 KiB is
+ protected and we're trying to erase the whole chip, erase should
+ fail. */
+ assert_int_equal(1, flashrom_flash_erase(&flash));
+
+ teardown(&layout);
+
+ flashrom_wp_cfg_release(wp_cfg);
+ free(param_dup);
+}
+
+/* Enabled WP does not block erasing unprotected parts of the chip */
+void partial_chip_erase_with_wp_dummyflasher_test_success(void **state)
+{
+ (void) state; /* unused */
+
+ struct flashrom_flashctx flash = { 0 };
+ struct flashrom_layout *layout;
+ struct flashchip mock_chip = chip_W25Q128_V;
+ struct flashrom_wp_cfg *wp_cfg;
+
+ char *param_dup = strdup("bus=spi,emulate=W25Q128FV,hwwp=yes");
+
+ setup_chip(&flash, &layout, &mock_chip, param_dup);
+ /* Layout region is created by setup_chip(). */
+ assert_int_equal(0, flashrom_layout_include_region(layout, "tail"));
+
+ assert_int_equal(0, flashrom_wp_cfg_new(&wp_cfg));
+
+ assert_int_equal(0, flashrom_wp_read_cfg(wp_cfg, &flash));
+
+ /* Hardware-protect head region. */
+ flashrom_wp_set_mode(wp_cfg, FLASHROM_WP_MODE_HARDWARE);
+ flashrom_wp_set_range(wp_cfg, 0, LAYOUT_TAIL_REGION_START);
+
+ assert_int_equal(0, flashrom_wp_write_cfg(&flash, wp_cfg));
+
+ /* First 4 KiB is the only protected part of the chip and the region
+ we included covers only unprotected part, so erase operation should
+ succeed. */
+ assert_int_equal(0, flashrom_flash_erase(&flash));
+
+ teardown(&layout);
+
+ flashrom_wp_cfg_release(wp_cfg);
+ free(param_dup);
+}
diff --git a/tests/meson.build b/tests/meson.build
index d3b46b19..588ac17f 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -23,6 +23,7 @@ srcs = [
'lifecycle.c',
'layout.c',
'chip.c',
+ 'chip_wp.c',
]
mocks = [
diff --git a/tests/tests.c b/tests/tests.c
index 6aabd908..2f955ff4 100644
--- a/tests/tests.c
+++ b/tests/tests.c
@@ -436,5 +436,15 @@ int main(void)
};
ret |= cmocka_run_group_tests_name("chip.c tests", chip_tests, NULL, NULL);
+ const struct CMUnitTest chip_wp_tests[] = {
+ cmocka_unit_test(invalid_wp_range_dummyflasher_test_success),
+ cmocka_unit_test(set_wp_range_dummyflasher_test_success),
+ cmocka_unit_test(switch_wp_mode_dummyflasher_test_success),
+ cmocka_unit_test(wp_init_from_status_dummyflasher_test_success),
+ cmocka_unit_test(full_chip_erase_with_wp_dummyflasher_test_success),
+ cmocka_unit_test(partial_chip_erase_with_wp_dummyflasher_test_success),
+ };
+ ret |= cmocka_run_group_tests_name("chip_wp.c tests", chip_wp_tests, NULL, NULL);
+
return ret;
}
diff --git a/tests/tests.h b/tests/tests.h
index 68f77819..89e40958 100644
--- a/tests/tests.h
+++ b/tests/tests.h
@@ -68,4 +68,12 @@ void write_chip_with_dummyflasher_test_success(void **state);
void verify_chip_test_success(void **state);
void verify_chip_with_dummyflasher_test_success(void **state);
+/* chip_wp.c */
+void invalid_wp_range_dummyflasher_test_success(void **state);
+void set_wp_range_dummyflasher_test_success(void **state);
+void switch_wp_mode_dummyflasher_test_success(void **state);
+void wp_init_from_status_dummyflasher_test_success(void **state);
+void full_chip_erase_with_wp_dummyflasher_test_success(void **state);
+void partial_chip_erase_with_wp_dummyflasher_test_success(void **state);
+
#endif /* TESTS_H */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-04 21:27:34 +0000