u-boot/lib/efi_selftest/efi_selftest_block_device.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* efi_selftest_block
*
* Copyright (c) 2017 Heinrich Schuchardt <xypron.glpk@gmx.de>
*
* This test checks the driver for block IO devices.
* A disk image is created in memory.
* A handle is created for the new block IO device.
* The block I/O protocol is installed on the handle.
* ConnectController is used to setup partitions and to install the simple
* file protocol.
* A known file is read from the file system and verified.
*/
#include <efi_selftest.h>
#include "efi_selftest_disk_image.h"
/* Block size of compressed disk image */
#define COMPRESSED_DISK_IMAGE_BLOCK_SIZE 8
/* Binary logarithm of the block size */
#define LB_BLOCK_SIZE 9
static struct efi_boot_services *boottime;
static const efi_guid_t block_io_protocol_guid = BLOCK_IO_GUID;
static const efi_guid_t guid_device_path = DEVICE_PATH_GUID;
static const efi_guid_t guid_simple_file_system_protocol =
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID;
static const efi_guid_t guid_file_system_info = EFI_FILE_SYSTEM_INFO_GUID;
static efi_guid_t guid_vendor =
EFI_GUID(0xdbca4c98, 0x6cb0, 0x694d,
0x08, 0x72, 0x81, 0x9c, 0x65, 0x0c, 0xb7, 0xb8);
static struct efi_device_path *dp;
/* One 8 byte block of the compressed disk image */
struct line {
size_t addr;
char *line;
};
/* Compressed disk image */
struct compressed_disk_image {
size_t length;
struct line lines[];
};
static const struct compressed_disk_image img = EFI_ST_DISK_IMG;
/* Decompressed disk image */
static u8 *image;
/*
* Reset service of the block IO protocol.
*
* @this block IO protocol
* @return status code
*/
static efi_status_t EFIAPI reset(
struct efi_block_io *this,
char extended_verification)
{
return EFI_SUCCESS;
}
/*
* Read service of the block IO protocol.
*
* @this block IO protocol
* @media_id media id
* @lba start of the read in logical blocks
* @buffer_size number of bytes to read
* @buffer target buffer
* @return status code
*/
static efi_status_t EFIAPI read_blocks(
struct efi_block_io *this, u32 media_id, u64 lba,
efi_uintn_t buffer_size, void *buffer)
{
u8 *start;
if ((lba << LB_BLOCK_SIZE) + buffer_size > img.length)
return EFI_INVALID_PARAMETER;
start = image + (lba << LB_BLOCK_SIZE);
boottime->copy_mem(buffer, start, buffer_size);
return EFI_SUCCESS;
}
/*
* Write service of the block IO protocol.
*
* @this block IO protocol
* @media_id media id
* @lba start of the write in logical blocks
* @buffer_size number of bytes to read
* @buffer source buffer
* @return status code
*/
static efi_status_t EFIAPI write_blocks(
struct efi_block_io *this, u32 media_id, u64 lba,
efi_uintn_t buffer_size, void *buffer)
{
u8 *start;
if ((lba << LB_BLOCK_SIZE) + buffer_size > img.length)
return EFI_INVALID_PARAMETER;
start = image + (lba << LB_BLOCK_SIZE);
boottime->copy_mem(start, buffer, buffer_size);
return EFI_SUCCESS;
}
/*
* Flush service of the block IO protocol.
*
* @this block IO protocol
* @return status code
*/
static efi_status_t EFIAPI flush_blocks(struct efi_block_io *this)
{
return EFI_SUCCESS;
}
/*
* Decompress the disk image.
*
* @image decompressed disk image
* @return status code
*/
static efi_status_t decompress(u8 **image)
{
u8 *buf;
size_t i;
size_t addr;
size_t len;
efi_status_t ret;
ret = boottime->allocate_pool(EFI_LOADER_DATA, img.length,
(void **)&buf);
if (ret != EFI_SUCCESS) {
efi_st_error("Out of memory\n");
return ret;
}
boottime->set_mem(buf, img.length, 0);
for (i = 0; ; ++i) {
if (!img.lines[i].line)
break;
addr = img.lines[i].addr;
len = COMPRESSED_DISK_IMAGE_BLOCK_SIZE;
if (addr + len > img.length)
len = img.length - addr;
boottime->copy_mem(buf + addr, img.lines[i].line, len);
}
*image = buf;
return ret;
}
static struct efi_block_io_media media;
static struct efi_block_io block_io = {
.media = &media,
.reset = reset,
.read_blocks = read_blocks,
.write_blocks = write_blocks,
.flush_blocks = flush_blocks,
};
/* Handle for the block IO device */
static efi_handle_t disk_handle;
/*
* Setup unit test.
*
* @handle: handle of the loaded image
* @systable: system table
* @return: EFI_ST_SUCCESS for success
*/
static int setup(const efi_handle_t handle,
const struct efi_system_table *systable)
{
efi_status_t ret;
struct efi_device_path_vendor vendor_node;
struct efi_device_path end_node;
boottime = systable->boottime;
decompress(&image);
block_io.media->block_size = 1 << LB_BLOCK_SIZE;
block_io.media->last_block = img.length >> LB_BLOCK_SIZE;
ret = boottime->install_protocol_interface(
&disk_handle, &block_io_protocol_guid,
EFI_NATIVE_INTERFACE, &block_io);
if (ret != EFI_SUCCESS) {
efi_st_error("Failed to install block I/O protocol\n");
return EFI_ST_FAILURE;
}
ret = boottime->allocate_pool(EFI_LOADER_DATA,
sizeof(struct efi_device_path_vendor) +
sizeof(struct efi_device_path),
(void **)&dp);
if (ret != EFI_SUCCESS) {
efi_st_error("Out of memory\n");
return EFI_ST_FAILURE;
}
vendor_node.dp.type = DEVICE_PATH_TYPE_HARDWARE_DEVICE;
vendor_node.dp.sub_type = DEVICE_PATH_SUB_TYPE_VENDOR;
vendor_node.dp.length = sizeof(struct efi_device_path_vendor);
boottime->copy_mem(&vendor_node.guid, &guid_vendor,
sizeof(efi_guid_t));
boottime->copy_mem(dp, &vendor_node,
sizeof(struct efi_device_path_vendor));
end_node.type = DEVICE_PATH_TYPE_END;
end_node.sub_type = DEVICE_PATH_SUB_TYPE_END;
end_node.length = sizeof(struct efi_device_path);
boottime->copy_mem((char *)dp + sizeof(struct efi_device_path_vendor),
&end_node, sizeof(struct efi_device_path));
ret = boottime->install_protocol_interface(&disk_handle,
&guid_device_path,
EFI_NATIVE_INTERFACE,
dp);
if (ret != EFI_SUCCESS) {
efi_st_error("InstallProtocolInterface failed\n");
return EFI_ST_FAILURE;
}
return EFI_ST_SUCCESS;
}
/*
* Tear down unit test.
*
* @return: EFI_ST_SUCCESS for success
*/
static int teardown(void)
{
efi_status_t r = EFI_ST_SUCCESS;
if (disk_handle) {
r = boottime->uninstall_protocol_interface(disk_handle,
&guid_device_path,
dp);
if (r != EFI_SUCCESS) {
efi_st_error("Uninstall device path failed\n");
return EFI_ST_FAILURE;
}
r = boottime->uninstall_protocol_interface(
disk_handle, &block_io_protocol_guid,
&block_io);
if (r != EFI_SUCCESS) {
efi_st_todo(
"Failed to uninstall block I/O protocol\n");
return EFI_ST_SUCCESS;
}
}
if (image) {
r = efi_free_pool(image);
if (r != EFI_SUCCESS) {
efi_st_error("Failed to free image\n");
return EFI_ST_FAILURE;
}
}
return r;
}
/*
* Get length of device path without end tag.
*
* @dp device path
* @return length of device path in bytes
*/
static efi_uintn_t dp_size(struct efi_device_path *dp)
{
struct efi_device_path *pos = dp;
while (pos->type != DEVICE_PATH_TYPE_END)
pos = (struct efi_device_path *)((char *)pos + pos->length);
return (char *)pos - (char *)dp;
}
/*
* Execute unit test.
*
* @return: EFI_ST_SUCCESS for success
*/
static int execute(void)
{
efi_status_t ret;
efi_uintn_t no_handles, i, len;
efi_handle_t *handles;
efi_handle_t handle_partition = NULL;
struct efi_device_path *dp_partition;
struct efi_simple_file_system_protocol *file_system;
struct efi_file_handle *root, *file;
struct {
struct efi_file_system_info info;
u16 label[12];
} system_info;
efi_uintn_t buf_size;
char buf[16] __aligned(ARCH_DMA_MINALIGN);
ret = boottime->connect_controller(disk_handle, NULL, NULL, 1);
if (ret != EFI_SUCCESS) {
efi_st_error("Failed to connect controller\n");
return EFI_ST_FAILURE;
}
ret = boottime->locate_handle_buffer(
BY_PROTOCOL, &guid_device_path, NULL,
&no_handles, &handles);
if (ret != EFI_SUCCESS) {
efi_st_error("Failed to locate handles\n");
return EFI_ST_FAILURE;
}
len = dp_size(dp);
for (i = 0; i < no_handles; ++i) {
ret = boottime->open_protocol(handles[i], &guid_device_path,
(void **)&dp_partition,
NULL, NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL);
if (ret != EFI_SUCCESS) {
efi_st_error("Failed to open device path protocol\n");
return EFI_ST_FAILURE;
}
if (len >= dp_size(dp_partition))
continue;
if (efi_st_memcmp(dp, dp_partition, len))
continue;
handle_partition = handles[i];
break;
}
ret = boottime->free_pool(handles);
if (ret != EFI_SUCCESS) {
efi_st_error("Failed to free pool memory\n");
return EFI_ST_FAILURE;
}
if (!handle_partition) {
efi_st_error("Partition handle not found\n");
return EFI_ST_FAILURE;
}
ret = boottime->open_protocol(handle_partition,
&guid_simple_file_system_protocol,
(void **)&file_system, NULL, NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL);
if (ret != EFI_SUCCESS) {
efi_st_error("Failed to open simple file system protocol\n");
return EFI_ST_FAILURE;
}
ret = file_system->open_volume(file_system, &root);
if (ret != EFI_SUCCESS) {
efi_st_error("Failed to open volume\n");
return EFI_ST_FAILURE;
}
buf_size = sizeof(system_info);
ret = root->getinfo(root, &guid_file_system_info, &buf_size,
&system_info);
if (ret != EFI_SUCCESS) {
efi_st_error("Failed to get file system info\n");
return EFI_ST_FAILURE;
}
if (system_info.info.block_size != 512) {
efi_st_error("Wrong block size %u, expected 512\n",
system_info.info.block_size);
return EFI_ST_FAILURE;
}
if (efi_st_strcmp_16_8(system_info.info.volume_label, "U-BOOT TEST")) {
efi_st_todo(
"Wrong volume label '%ps', expected 'U-BOOT TEST'\n",
system_info.info.volume_label);
}
ret = root->open(root, &file, (s16 *)L"hello.txt", EFI_FILE_MODE_READ,
0);
if (ret != EFI_SUCCESS) {
efi_st_error("Failed to open file\n");
return EFI_ST_FAILURE;
}
buf_size = sizeof(buf) - 1;
ret = file->read(file, &buf_size, buf);
if (ret != EFI_SUCCESS) {
efi_st_error("Failed to read file\n");
return EFI_ST_FAILURE;
}
if (efi_st_memcmp(buf, "Hello world!", 12)) {
efi_st_error("Unexpected file content\n");
return EFI_ST_FAILURE;
}
ret = file->close(file);
if (ret != EFI_SUCCESS) {
efi_st_error("Failed to close file\n");
return EFI_ST_FAILURE;
}
ret = root->close(root);
if (ret != EFI_SUCCESS) {
efi_st_error("Failed to close volume\n");
return EFI_ST_FAILURE;
}
return EFI_ST_SUCCESS;
}
EFI_UNIT_TEST(blkdev) = {
.name = "block device",
.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
.setup = setup,
.execute = execute,
.teardown = teardown,
};