forked from luck/tmp_suning_uos_patched
[PATCH] tpm: reorganize sysfs files
Many of the sysfs files were calling the TPM_GetCapability command with array. Since for 1.2 more sysfs files of this type are coming I am generalizing the array so there can be one array and the unique parts can be filled in just before the command is called. Signed-off-by: Kylene Hall <kjhall@us.ibm.com> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Kylene Jo Hall
Linus Torvalds
parent
3c2f606a09
commit
beed53a1aa
@ -119,17 +119,57 @@ static ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
|
||||
}
|
||||
|
||||
#define TPM_DIGEST_SIZE 20
|
||||
#define CAP_PCR_RESULT_SIZE 18
|
||||
static const u8 cap_pcr[] = {
|
||||
#define TPM_ERROR_SIZE 10
|
||||
#define TPM_RET_CODE_IDX 6
|
||||
#define TPM_GET_CAP_RET_SIZE_IDX 10
|
||||
#define TPM_GET_CAP_RET_UINT32_1_IDX 14
|
||||
#define TPM_GET_CAP_RET_UINT32_2_IDX 18
|
||||
#define TPM_GET_CAP_RET_UINT32_3_IDX 22
|
||||
#define TPM_GET_CAP_RET_UINT32_4_IDX 26
|
||||
|
||||
#define TPM_CAP_IDX 13
|
||||
#define TPM_CAP_SUBCAP_IDX 21
|
||||
|
||||
enum tpm_capabilities {
|
||||
TPM_CAP_PROP = 5,
|
||||
};
|
||||
|
||||
enum tpm_sub_capabilities {
|
||||
TPM_CAP_PROP_PCR = 0x1,
|
||||
TPM_CAP_PROP_MANUFACTURER = 0x3,
|
||||
};
|
||||
|
||||
/*
|
||||
* This is a semi generic GetCapability command for use
|
||||
* with the capability type TPM_CAP_PROP or TPM_CAP_FLAG
|
||||
* and their associated sub_capabilities.
|
||||
*/
|
||||
|
||||
static const u8 tpm_cap[] = {
|
||||
0, 193, /* TPM_TAG_RQU_COMMAND */
|
||||
0, 0, 0, 22, /* length */
|
||||
0, 0, 0, 101, /* TPM_ORD_GetCapability */
|
||||
0, 0, 0, 5,
|
||||
0, 0, 0, 4,
|
||||
0, 0, 1, 1
|
||||
0, 0, 0, 0, /* TPM_CAP_<TYPE> */
|
||||
0, 0, 0, 4, /* TPM_CAP_SUB_<TYPE> size */
|
||||
0, 0, 1, 0 /* TPM_CAP_SUB_<TYPE> */
|
||||
};
|
||||
|
||||
#define READ_PCR_RESULT_SIZE 30
|
||||
static ssize_t transmit_cmd(struct tpm_chip *chip, u8 *data, int len,
|
||||
char *desc)
|
||||
{
|
||||
int err;
|
||||
|
||||
len = tpm_transmit(chip, data, len);
|
||||
if (len < 0)
|
||||
return len;
|
||||
if (len == TPM_ERROR_SIZE) {
|
||||
err = be32_to_cpu(*((__be32 *) (data + TPM_RET_CODE_IDX)));
|
||||
dev_dbg(chip->dev, "A TPM error (%d) occurred %s\n", err, desc);
|
||||
return err;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const u8 pcrread[] = {
|
||||
0, 193, /* TPM_TAG_RQU_COMMAND */
|
||||
0, 0, 0, 14, /* length */
|
||||
@ -140,8 +180,8 @@ static const u8 pcrread[] = {
|
||||
ssize_t tpm_show_pcrs(struct device *dev, struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
u8 data[READ_PCR_RESULT_SIZE];
|
||||
ssize_t len;
|
||||
u8 data[30];
|
||||
ssize_t rc;
|
||||
int i, j, num_pcrs;
|
||||
__be32 index;
|
||||
char *str = buf;
|
||||
@ -150,29 +190,24 @@ ssize_t tpm_show_pcrs(struct device *dev, struct device_attribute *attr,
|
||||
if (chip == NULL)
|
||||
return -ENODEV;
|
||||
|
||||
memcpy(data, cap_pcr, sizeof(cap_pcr));
|
||||
if ((len = tpm_transmit(chip, data, sizeof(data)))
|
||||
< CAP_PCR_RESULT_SIZE) {
|
||||
dev_dbg(chip->dev, "A TPM error (%d) occurred "
|
||||
"attempting to determine the number of PCRS\n",
|
||||
be32_to_cpu(*((__be32 *) (data + 6))));
|
||||
memcpy(data, tpm_cap, sizeof(tpm_cap));
|
||||
data[TPM_CAP_IDX] = TPM_CAP_PROP;
|
||||
data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_PCR;
|
||||
|
||||
rc = transmit_cmd(chip, data, sizeof(data),
|
||||
"attempting to determine the number of PCRS");
|
||||
if (rc)
|
||||
return 0;
|
||||
}
|
||||
|
||||
num_pcrs = be32_to_cpu(*((__be32 *) (data + 14)));
|
||||
|
||||
for (i = 0; i < num_pcrs; i++) {
|
||||
memcpy(data, pcrread, sizeof(pcrread));
|
||||
index = cpu_to_be32(i);
|
||||
memcpy(data + 10, &index, 4);
|
||||
if ((len = tpm_transmit(chip, data, sizeof(data)))
|
||||
< READ_PCR_RESULT_SIZE){
|
||||
dev_dbg(chip->dev, "A TPM error (%d) occurred"
|
||||
" attempting to read PCR %d of %d\n",
|
||||
be32_to_cpu(*((__be32 *) (data + 6))),
|
||||
i, num_pcrs);
|
||||
rc = transmit_cmd(chip, data, sizeof(data),
|
||||
"attempting to read a PCR");
|
||||
if (rc)
|
||||
goto out;
|
||||
}
|
||||
str += sprintf(str, "PCR-%02d: ", i);
|
||||
for (j = 0; j < TPM_DIGEST_SIZE; j++)
|
||||
str += sprintf(str, "%02X ", *(data + 10 + j));
|
||||
@ -194,7 +229,7 @@ ssize_t tpm_show_pubek(struct device *dev, struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
u8 *data;
|
||||
ssize_t len;
|
||||
ssize_t err;
|
||||
int i, rc;
|
||||
char *str = buf;
|
||||
|
||||
@ -208,14 +243,10 @@ ssize_t tpm_show_pubek(struct device *dev, struct device_attribute *attr,
|
||||
|
||||
memcpy(data, readpubek, sizeof(readpubek));
|
||||
|
||||
if ((len = tpm_transmit(chip, data, READ_PUBEK_RESULT_SIZE)) <
|
||||
READ_PUBEK_RESULT_SIZE) {
|
||||
dev_dbg(chip->dev, "A TPM error (%d) occurred "
|
||||
"attempting to read the PUBEK\n",
|
||||
be32_to_cpu(*((__be32 *) (data + 6))));
|
||||
rc = 0;
|
||||
err = transmit_cmd(chip, data, READ_PUBEK_RESULT_SIZE,
|
||||
"attempting to read the PUBEK");
|
||||
if (err)
|
||||
goto out;
|
||||
}
|
||||
|
||||
/*
|
||||
ignore header 10 bytes
|
||||
@ -245,63 +276,59 @@ ssize_t tpm_show_pubek(struct device *dev, struct device_attribute *attr,
|
||||
if ((i + 1) % 16 == 0)
|
||||
str += sprintf(str, "\n");
|
||||
}
|
||||
rc = str - buf;
|
||||
out:
|
||||
rc = str - buf;
|
||||
kfree(data);
|
||||
return rc;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(tpm_show_pubek);
|
||||
|
||||
#define CAP_VER_RESULT_SIZE 18
|
||||
#define CAP_VERSION_1_1 6
|
||||
#define CAP_VERSION_IDX 13
|
||||
static const u8 cap_version[] = {
|
||||
0, 193, /* TPM_TAG_RQU_COMMAND */
|
||||
0, 0, 0, 18, /* length */
|
||||
0, 0, 0, 101, /* TPM_ORD_GetCapability */
|
||||
0, 0, 0, 6,
|
||||
0, 0, 0, 0,
|
||||
0, 0, 0, 0
|
||||
};
|
||||
|
||||
#define CAP_MANUFACTURER_RESULT_SIZE 18
|
||||
static const u8 cap_manufacturer[] = {
|
||||
0, 193, /* TPM_TAG_RQU_COMMAND */
|
||||
0, 0, 0, 22, /* length */
|
||||
0, 0, 0, 101, /* TPM_ORD_GetCapability */
|
||||
0, 0, 0, 5,
|
||||
0, 0, 0, 4,
|
||||
0, 0, 1, 3
|
||||
};
|
||||
|
||||
ssize_t tpm_show_caps(struct device *dev, struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
u8 data[sizeof(cap_manufacturer)];
|
||||
ssize_t len;
|
||||
u8 data[30];
|
||||
ssize_t rc;
|
||||
char *str = buf;
|
||||
|
||||
struct tpm_chip *chip = dev_get_drvdata(dev);
|
||||
if (chip == NULL)
|
||||
return -ENODEV;
|
||||
|
||||
memcpy(data, cap_manufacturer, sizeof(cap_manufacturer));
|
||||
memcpy(data, tpm_cap, sizeof(tpm_cap));
|
||||
data[TPM_CAP_IDX] = TPM_CAP_PROP;
|
||||
data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_MANUFACTURER;
|
||||
|
||||
if ((len = tpm_transmit(chip, data, sizeof(data))) <
|
||||
CAP_MANUFACTURER_RESULT_SIZE)
|
||||
return len;
|
||||
rc = transmit_cmd(chip, data, sizeof(data),
|
||||
"attempting to determine the manufacturer");
|
||||
if (rc)
|
||||
return 0;
|
||||
|
||||
str += sprintf(str, "Manufacturer: 0x%x\n",
|
||||
be32_to_cpu(*((__be32 *) (data + 14))));
|
||||
be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_1_IDX))));
|
||||
|
||||
memcpy(data, cap_version, sizeof(cap_version));
|
||||
data[CAP_VERSION_IDX] = CAP_VERSION_1_1;
|
||||
rc = transmit_cmd(chip, data, sizeof(data),
|
||||
"attempting to determine the 1.1 version");
|
||||
if (rc)
|
||||
goto out;
|
||||
|
||||
if ((len = tpm_transmit(chip, data, sizeof(data))) <
|
||||
CAP_VER_RESULT_SIZE)
|
||||
return len;
|
||||
|
||||
str +=
|
||||
sprintf(str, "TCG version: %d.%d\nFirmware version: %d.%d\n",
|
||||
(int) data[14], (int) data[15], (int) data[16],
|
||||
(int) data[17]);
|
||||
str += sprintf(str,
|
||||
"TCG version: %d.%d\nFirmware version: %d.%d\n",
|
||||
(int) data[14], (int) data[15], (int) data[16],
|
||||
(int) data[17]);
|
||||
|
||||
out:
|
||||
return str - buf;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(tpm_show_caps);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user