1 files changed, 233 insertions, 2 deletions

diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index e54bcb4e4e3e..24c4423d4851 100644
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -430,17 +430,27 @@ out:
 #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_GET_CAP_PERM_DISABLE_IDX 16
+#define TPM_GET_CAP_PERM_INACTIVE_IDX 18
+#define TPM_GET_CAP_RET_BOOL_1_IDX 14
+#define TPM_GET_CAP_TEMP_INACTIVE_IDX 16
 
 #define TPM_CAP_IDX 13
 #define TPM_CAP_SUBCAP_IDX 21
 
 enum tpm_capabilities {
+        TPM_CAP_FLAG = 4,
         TPM_CAP_PROP = 5,
 };
 
 enum tpm_sub_capabilities {
         TPM_CAP_PROP_PCR = 0x1,
         TPM_CAP_PROP_MANUFACTURER = 0x3,
+        TPM_CAP_FLAG_PERM = 0x8,
+        TPM_CAP_FLAG_VOL = 0x9,
+        TPM_CAP_PROP_OWNER = 0x11,
+        TPM_CAP_PROP_TIS_TIMEOUT = 0x15,
+        TPM_CAP_PROP_TIS_DURATION = 0x20,
 };
 
 /*
@@ -474,6 +484,180 @@ static ssize_t transmit_cmd(struct tpm_chip *chip, u8 *data, int len,
         return 0;
 }
 
+void tpm_gen_interrupt(struct tpm_chip *chip)
+{
+        u8 data[max_t(int, ARRAY_SIZE(tpm_cap), 30)];
+        ssize_t rc;
+
+        memcpy(data, tpm_cap, sizeof(tpm_cap));
+        data[TPM_CAP_IDX] = TPM_CAP_PROP;
+        data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_TIS_TIMEOUT;
+
+        rc = transmit_cmd(chip, data, sizeof(data),
+                        "attempting to determine the timeouts");
+}
+EXPORT_SYMBOL_GPL(tpm_gen_interrupt);
+
+void tpm_get_timeouts(struct tpm_chip *chip)
+{
+        u8 data[max_t(int, ARRAY_SIZE(tpm_cap), 30)];
+        ssize_t rc;
+        u32 timeout;
+
+        memcpy(data, tpm_cap, sizeof(tpm_cap));
+        data[TPM_CAP_IDX] = TPM_CAP_PROP;
+        data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_TIS_TIMEOUT;
+
+        rc = transmit_cmd(chip, data, sizeof(data),
+                        "attempting to determine the timeouts");
+        if (rc)
+                goto duration;
+
+        if (be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_SIZE_IDX)))
+            != 4 * sizeof(u32))
+                goto duration;
+
+        /* Don't overwrite default if value is 0 */
+        timeout =
+            be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_1_IDX)));
+        if (timeout)
+                chip->vendor.timeout_a = timeout;
+        timeout =
+            be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_2_IDX)));
+        if (timeout)
+                chip->vendor.timeout_b = timeout;
+        timeout =
+            be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_3_IDX)));
+        if (timeout)
+                chip->vendor.timeout_c = timeout;
+        timeout =
+            be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_4_IDX)));
+        if (timeout)
+                chip->vendor.timeout_d = timeout;
+
+duration:
+        memcpy(data, tpm_cap, sizeof(tpm_cap));
+        data[TPM_CAP_IDX] = TPM_CAP_PROP;
+        data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_TIS_DURATION;
+
+        rc = transmit_cmd(chip, data, sizeof(data),
+                        "attempting to determine the durations");
+        if (rc)
+                return;
+
+        if (be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_SIZE_IDX)))
+            != 3 * sizeof(u32))
+                return;
+
+        chip->vendor.duration[TPM_SHORT] =
+            be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_1_IDX)));
+        chip->vendor.duration[TPM_MEDIUM] =
+            be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_2_IDX)));
+        chip->vendor.duration[TPM_LONG] =
+            be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_3_IDX)));
+}
+EXPORT_SYMBOL_GPL(tpm_get_timeouts);
+
+void tpm_continue_selftest(struct tpm_chip *chip)
+{
+        u8 data[] = {
+                0, 193,                 /* TPM_TAG_RQU_COMMAND */
+                0, 0, 0, 10,            /* length */
+                0, 0, 0, 83,            /* TPM_ORD_GetCapability */
+        };
+
+        tpm_transmit(chip, data, sizeof(data));
+}
+EXPORT_SYMBOL_GPL(tpm_continue_selftest);
+
+ssize_t tpm_show_enabled(struct device * dev, struct device_attribute * attr,
+                        char *buf)
+{
+        u8 data[max_t(int, ARRAY_SIZE(tpm_cap), 35)];
+        ssize_t rc;
+
+        struct tpm_chip *chip = dev_get_drvdata(dev);
+        if (chip == NULL)
+                return -ENODEV;
+
+        memcpy(data, tpm_cap, sizeof(tpm_cap));
+        data[TPM_CAP_IDX] = TPM_CAP_FLAG;
+        data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_FLAG_PERM;
+
+        rc = transmit_cmd(chip, data, sizeof(data),
+                        "attemtping to determine the permanent state");
+        if (rc)
+                return 0;
+        return sprintf(buf, "%d\n", !data[TPM_GET_CAP_PERM_DISABLE_IDX]);
+}
+EXPORT_SYMBOL_GPL(tpm_show_enabled);
+
+ssize_t tpm_show_active(struct device * dev, struct device_attribute * attr,
+                        char *buf)
+{
+        u8 data[max_t(int, ARRAY_SIZE(tpm_cap), 35)];
+        ssize_t rc;
+
+        struct tpm_chip *chip = dev_get_drvdata(dev);
+        if (chip == NULL)
+                return -ENODEV;
+
+        memcpy(data, tpm_cap, sizeof(tpm_cap));
+        data[TPM_CAP_IDX] = TPM_CAP_FLAG;
+        data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_FLAG_PERM;
+
+        rc = transmit_cmd(chip, data, sizeof(data),
+                        "attemtping to determine the permanent state");
+        if (rc)
+                return 0;
+        return sprintf(buf, "%d\n", !data[TPM_GET_CAP_PERM_INACTIVE_IDX]);
+}
+EXPORT_SYMBOL_GPL(tpm_show_active);
+
+ssize_t tpm_show_owned(struct device * dev, struct device_attribute * attr,
+                        char *buf)
+{
+        u8 data[sizeof(tpm_cap)];
+        ssize_t rc;
+
+        struct tpm_chip *chip = dev_get_drvdata(dev);
+        if (chip == NULL)
+                return -ENODEV;
+
+        memcpy(data, tpm_cap, sizeof(tpm_cap));
+        data[TPM_CAP_IDX] = TPM_CAP_PROP;
+        data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_OWNER;
+
+        rc = transmit_cmd(chip, data, sizeof(data),
+                        "attempting to determine the owner state");
+        if (rc)
+                return 0;
+        return sprintf(buf, "%d\n", data[TPM_GET_CAP_RET_BOOL_1_IDX]);
+}
+EXPORT_SYMBOL_GPL(tpm_show_owned);
+
+ssize_t tpm_show_temp_deactivated(struct device * dev,
+                                struct device_attribute * attr, char *buf)
+{
+        u8 data[sizeof(tpm_cap)];
+        ssize_t rc;
+
+        struct tpm_chip *chip = dev_get_drvdata(dev);
+        if (chip == NULL)
+                return -ENODEV;
+
+        memcpy(data, tpm_cap, sizeof(tpm_cap));
+        data[TPM_CAP_IDX] = TPM_CAP_FLAG;
+        data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_FLAG_VOL;
+
+        rc = transmit_cmd(chip, data, sizeof(data),
+                        "attempting to determine the temporary state");
+        if (rc)
+                return 0;
+        return sprintf(buf, "%d\n", data[TPM_GET_CAP_TEMP_INACTIVE_IDX]);
+}
+EXPORT_SYMBOL_GPL(tpm_show_temp_deactivated);
+
 static const u8 pcrread[] = {
         0, 193,                 /* TPM_TAG_RQU_COMMAND */
         0, 0, 0, 14,            /* length */
@@ -484,7 +668,7 @@ static const u8 pcrread[] = {
 ssize_t tpm_show_pcrs(struct device *dev, struct device_attribute *attr,
                       char *buf)
 {
-        u8 data[30];
+        u8 data[max_t(int, max(ARRAY_SIZE(tpm_cap), ARRAY_SIZE(pcrread)), 30)];
         ssize_t rc;
         int i, j, num_pcrs;
         __be32 index;
@@ -588,6 +772,7 @@ out:
 EXPORT_SYMBOL_GPL(tpm_show_pubek);
 
 #define CAP_VERSION_1_1 6
+#define CAP_VERSION_1_2 0x1A
 #define CAP_VERSION_IDX 13
 static const u8 cap_version[] = {
         0, 193,                 /* TPM_TAG_RQU_COMMAND */
@@ -600,7 +785,7 @@ static const u8 cap_version[] = {
 ssize_t tpm_show_caps(struct device *dev, struct device_attribute *attr,
                       char *buf)
 {
-        u8 data[30];
+        u8 data[max_t(int, max(ARRAY_SIZE(tpm_cap), ARRAY_SIZE(cap_version)), 30)];
         ssize_t rc;
         char *str = buf;
 
@@ -637,6 +822,52 @@ out:
 }
 EXPORT_SYMBOL_GPL(tpm_show_caps);
 
+ssize_t tpm_show_caps_1_2(struct device * dev,
+                          struct device_attribute * attr, char *buf)
+{
+        u8 data[max_t(int, max(ARRAY_SIZE(tpm_cap), ARRAY_SIZE(cap_version)), 30)];
+        ssize_t len;
+        char *str = buf;
+
+        struct tpm_chip *chip = dev_get_drvdata(dev);
+        if (chip == NULL)
+                return -ENODEV;
+
+        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))) <=
+            TPM_ERROR_SIZE) {
+                dev_dbg(chip->dev, "A TPM error (%d) occurred "
+                        "attempting to determine the manufacturer\n",
+                        be32_to_cpu(*((__be32 *) (data + TPM_RET_CODE_IDX))));
+                return 0;
+        }
+
+        str += sprintf(str, "Manufacturer: 0x%x\n",
+                       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_2;
+
+        if ((len = tpm_transmit(chip, data, sizeof(data))) <=
+            TPM_ERROR_SIZE) {
+                dev_err(chip->dev, "A TPM error (%d) occurred "
+                        "attempting to determine the 1.2 version\n",
+                        be32_to_cpu(*((__be32 *) (data + TPM_RET_CODE_IDX))));
+                goto out;
+        }
+        str += sprintf(str,
+                       "TCG version: %d.%d\nFirmware version: %d.%d\n",
+                       (int) data[16], (int) data[17], (int) data[18],
+                       (int) data[19]);
+
+out:
+        return str - buf;
+}
+EXPORT_SYMBOL_GPL(tpm_show_caps_1_2);
+
 ssize_t tpm_store_cancel(struct device *dev, struct device_attribute *attr,
                         const char *buf, size_t count)
 {