[S] Change in flashrom[main]: [WIP] Fix FEATURE_NO_ERASE chips and add test for them

[Anastasia Klimchuk (Code Review)]

Anastasia Klimchuk has uploaded this change for review. ( https://review.coreboot.org/c/flashrom/+/84203?usp=email )

Change subject: [WIP] Fix FEATURE_NO_ERASE chips and add test for them
......................................................................

[WIP] Fix FEATURE_NO_ERASE chips and add test for them

Change-Id: I582fe00da0715e9b5e92fcc9d15d5a90a2615117
Signed-off-by: Anastasia Klimchuk 
---
M flashrom.c
M tests/chip.c
M tests/tests.c
M tests/tests.h
4 files changed, 45 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/03/84203/1

diff --git a/flashrom.c b/flashrom.c
index 01a41c4..5dee1fc 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -482,7 +482,7 @@
    	return 1;
    }

-	if (flash->mst->buses_supported & BUS_SPI) {
+	if (!(flash->chip->feature_bits & FEATURE_NO_ERASE) && flash->mst->buses_supported & BUS_SPI) {
    	const uint8_t *opcode = spi_get_opcode_from_erasefn(eraser.block_erase);
    	for (int i = 0; opcode[i]; i++) {
    		if (!spi_probe_opcode(flash, opcode[i])) {
diff --git a/tests/chip.c b/tests/chip.c
index 3e1ae3b..9e87d30 100644
--- a/tests/chip.c
+++ b/tests/chip.c
@@ -132,6 +132,22 @@
     }},
 };

+static const struct flashchip chip_no_erase = {
+	.vendor		= "aklm",
+	.bustype	= BUS_SPI,
+	.total_size	= MOCK_CHIP_SIZE / KiB,
+	.tested		= TEST_OK_PREW,
+	.read		= TEST_READ_INJECTOR,
+	.write		= TEST_WRITE_INJECTOR,
+	.page_size	= 256,
+	.feature_bits	= FEATURE_NO_ERASE | FEATURE_ERASED_ZERO,
+	.block_erasers	=
+	{{
+		.eraseblocks = { {MOCK_CHIP_SIZE, 1} },
+		.block_erase = SPI_BLOCK_ERASE_EMULATION,
+	}},
+};
+
 /* Setup the struct for W25Q128.V, all values come from flashchips.c */
 static const struct flashchip chip_W25Q128_V = {
    .vendor		= "aklm&dummyflasher",
@@ -384,6 +400,32 @@
    free(newcontents);
 }

+void write_chip_feature_no_erase(void **state)
+{
+	(void) state; /* unused */
+
+	g_test_write_injector = write_chip;
+	g_test_read_injector = read_chip;
+	struct flashrom_flashctx flashctx = { 0 };
+	struct flashrom_layout *layout;
+	struct flashchip mock_chip = chip_no_erase;
+	const char *param = "bus=spi";
+
+	setup_chip(&flashctx, &layout, &mock_chip, param, NULL);
+
+	uint8_t *const newcontents = malloc(MOCK_CHIP_SIZE);
+	assert_non_null(newcontents);
+	memset(newcontents, 0xCC, MOCK_CHIP_SIZE);
+
+	printf("Write chip operation started.\n");
+	assert_int_equal(0, flashrom_image_write(&flashctx, newcontents, MOCK_CHIP_SIZE, NULL));
+	assert_int_equal(0, flashrom_image_verify(&flashctx, newcontents, MOCK_CHIP_SIZE));
+	printf("Write chip operation done.\n");
+
+	teardown(&layout);
+
+	free(newcontents);
+}
 void write_nonaligned_region_with_dummyflasher_test_success(void **state)
 {
    (void) state; /* unused */
diff --git a/tests/tests.c b/tests/tests.c
index 165390a..78f1b47 100644
--- a/tests/tests.c
+++ b/tests/tests.c
@@ -498,6 +498,7 @@
    	cmocka_unit_test(read_chip_with_dummyflasher_test_success),
    	cmocka_unit_test(write_chip_test_success),
    	cmocka_unit_test(write_chip_with_dummyflasher_test_success),
+		cmocka_unit_test(write_chip_feature_no_erase),
    	cmocka_unit_test(write_nonaligned_region_with_dummyflasher_test_success),
    	cmocka_unit_test(verify_chip_test_success),
    	cmocka_unit_test(verify_chip_with_dummyflasher_test_success),
diff --git a/tests/tests.h b/tests/tests.h
index 8cf8be0..3536d1d 100644
--- a/tests/tests.h
+++ b/tests/tests.h
@@ -86,6 +86,7 @@
 void read_chip_with_dummyflasher_test_success(void **state);
 void write_chip_test_success(void **state);
 void write_chip_with_dummyflasher_test_success(void **state);
+void write_chip_feature_no_erase(void **state);
 void write_nonaligned_region_with_dummyflasher_test_success(void **state);
 void verify_chip_test_success(void **state);
 void verify_chip_with_dummyflasher_test_success(void **state);