u-boot/lib/tpm-common.c
Tom Rini 467382ca03 lib: Remove <common.h> inclusion from these files
After some header file cleanups to add missing include files, remove
common.h from all files in the lib directory. This primarily means just
dropping the line but in a few cases we need to add in other header
files now.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
2023-12-21 08:54:37 -05:00

209 lines
4 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2013 The Chromium OS Authors.
* Coypright (c) 2013 Guntermann & Drunck GmbH
*/
#define LOG_CATEGORY UCLASS_TPM
#include <dm.h>
#include <log.h>
#include <asm/unaligned.h>
#include <tpm-common.h>
#include "tpm-utils.h"
enum tpm_version tpm_get_version(struct udevice *dev)
{
struct tpm_chip_priv *priv = dev_get_uclass_priv(dev);
return priv->version;
}
int pack_byte_string(u8 *str, size_t size, const char *format, ...)
{
va_list args;
size_t offset = 0, length = 0;
u8 *data = NULL;
u32 value = 0;
va_start(args, format);
for (; *format; format++) {
switch (*format) {
case 'b':
offset = va_arg(args, size_t);
value = va_arg(args, int);
length = 1;
break;
case 'w':
offset = va_arg(args, size_t);
value = va_arg(args, int);
length = 2;
break;
case 'd':
offset = va_arg(args, size_t);
value = va_arg(args, u32);
length = 4;
break;
case 's':
offset = va_arg(args, size_t);
data = va_arg(args, u8 *);
length = va_arg(args, u32);
break;
default:
debug("Couldn't recognize format string\n");
va_end(args);
return -1;
}
if (offset + length > size) {
va_end(args);
return -1;
}
switch (*format) {
case 'b':
str[offset] = value;
break;
case 'w':
put_unaligned_be16(value, str + offset);
break;
case 'd':
put_unaligned_be32(value, str + offset);
break;
case 's':
memcpy(str + offset, data, length);
break;
}
}
va_end(args);
return 0;
}
int unpack_byte_string(const u8 *str, size_t size, const char *format, ...)
{
va_list args;
size_t offset = 0, length = 0;
u8 *ptr8 = NULL;
u16 *ptr16 = NULL;
u32 *ptr32 = NULL;
va_start(args, format);
for (; *format; format++) {
switch (*format) {
case 'b':
offset = va_arg(args, size_t);
ptr8 = va_arg(args, u8 *);
length = 1;
break;
case 'w':
offset = va_arg(args, size_t);
ptr16 = va_arg(args, u16 *);
length = 2;
break;
case 'd':
offset = va_arg(args, size_t);
ptr32 = va_arg(args, u32 *);
length = 4;
break;
case 's':
offset = va_arg(args, size_t);
ptr8 = va_arg(args, u8 *);
length = va_arg(args, u32);
break;
default:
va_end(args);
debug("Couldn't recognize format string\n");
return -1;
}
if (offset + length > size) {
va_end(args);
log_err("Failed to read: size=%zd, offset=%zx, len=%zx\n",
size, offset, length);
return -1;
}
switch (*format) {
case 'b':
*ptr8 = str[offset];
break;
case 'w':
*ptr16 = get_unaligned_be16(str + offset);
break;
case 'd':
*ptr32 = get_unaligned_be32(str + offset);
break;
case 's':
memcpy(ptr8, str + offset, length);
break;
}
}
va_end(args);
return 0;
}
u32 tpm_command_size(const void *command)
{
const size_t command_size_offset = 2;
return get_unaligned_be32(command + command_size_offset);
}
u32 tpm_return_code(const void *response)
{
const size_t return_code_offset = 6;
return get_unaligned_be32(response + return_code_offset);
}
u32 tpm_sendrecv_command(struct udevice *dev, const void *command,
void *response, size_t *size_ptr)
{
int err, ret;
u8 response_buffer[COMMAND_BUFFER_SIZE];
size_t response_length;
int i;
uint size;
if (response) {
response_length = *size_ptr;
} else {
response = response_buffer;
response_length = sizeof(response_buffer);
}
size = tpm_command_size(command);
/* sanity check, which also helps coverity */
if (size > COMMAND_BUFFER_SIZE)
return log_msg_ret("size", -E2BIG);
log_debug("TPM request [size:%d]: ", size);
for (i = 0; i < size; i++)
log_debug("%02x ", ((u8 *)command)[i]);
log_debug("\n");
err = tpm_xfer(dev, command, size, response, &response_length);
if (err < 0)
return err;
if (size_ptr)
*size_ptr = response_length;
ret = tpm_return_code(response);
log_debug("TPM response [ret:%d]: ", ret);
for (i = 0; i < response_length; i++)
log_debug("%02x ", ((u8 *)response)[i]);
log_debug("\n");
return ret;
}
int tpm_init(struct udevice *dev)
{
return tpm_open(dev);
}