enum tpm_const {
TPM_MINOR = 224, /* officially assigned */
- TPM_MIN_BUFSIZE = 2048,
- TPM_MAX_BUFSIZE = 64 * 1024,
+#ifndef CONFIG_XEN
+ TPM_BUFSIZE = 2048,
+#endif
TPM_NUM_DEVICES = 256,
- TPM_NUM_MASK_ENTRIES = TPM_NUM_DEVICES / (8 * sizeof(int))
};
+enum tpm_duration {
+ TPM_SHORT = 0,
+ TPM_MEDIUM = 1,
+ TPM_LONG = 2,
+ TPM_UNDEFINED,
+};
+
+#define TPM_MAX_ORDINAL 243
+#define TPM_MAX_PROTECTED_ORDINAL 12
+#define TPM_PROTECTED_ORDINAL_MASK 0xFF
+
static LIST_HEAD(tpm_chip_list);
static DEFINE_SPINLOCK(driver_lock);
-static int dev_mask[TPM_NUM_MASK_ENTRIES];
+static DECLARE_BITMAP(dev_mask, TPM_NUM_DEVICES);
+
+/*
+ * Array with one entry per ordinal defining the maximum amount
+ * of time the chip could take to return the result. The ordinal
+ * designation of short, medium or long is defined in a table in
+ * TCG Specification TPM Main Part 2 TPM Structures Section 17. The
+ * values of the SHORT, MEDIUM, and LONG durations are retrieved
+ * from the chip during initialization with a call to tpm_get_timeouts.
+ */
+static const u8 tpm_protected_ordinal_duration[TPM_MAX_PROTECTED_ORDINAL] = {
+ TPM_UNDEFINED, /* 0 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED, /* 5 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT, /* 10 */
+ TPM_SHORT,
+};
+
+static const u8 tpm_ordinal_duration[TPM_MAX_ORDINAL] = {
+ TPM_UNDEFINED, /* 0 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED, /* 5 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT, /* 10 */
+ TPM_SHORT,
+ TPM_MEDIUM,
+ TPM_LONG,
+ TPM_LONG,
+ TPM_MEDIUM, /* 15 */
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_MEDIUM,
+ TPM_LONG,
+ TPM_SHORT, /* 20 */
+ TPM_SHORT,
+ TPM_MEDIUM,
+ TPM_MEDIUM,
+ TPM_MEDIUM,
+ TPM_SHORT, /* 25 */
+ TPM_SHORT,
+ TPM_MEDIUM,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_MEDIUM, /* 30 */
+ TPM_LONG,
+ TPM_MEDIUM,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT, /* 35 */
+ TPM_MEDIUM,
+ TPM_MEDIUM,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_MEDIUM, /* 40 */
+ TPM_LONG,
+ TPM_MEDIUM,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT, /* 45 */
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_LONG,
+ TPM_MEDIUM, /* 50 */
+ TPM_MEDIUM,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED, /* 55 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_MEDIUM, /* 60 */
+ TPM_MEDIUM,
+ TPM_MEDIUM,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_MEDIUM, /* 65 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT, /* 70 */
+ TPM_SHORT,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED, /* 75 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_LONG, /* 80 */
+ TPM_UNDEFINED,
+ TPM_MEDIUM,
+ TPM_LONG,
+ TPM_SHORT,
+ TPM_UNDEFINED, /* 85 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT, /* 90 */
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_UNDEFINED, /* 95 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_MEDIUM, /* 100 */
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED, /* 105 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT, /* 110 */
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT, /* 115 */
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_LONG, /* 120 */
+ TPM_LONG,
+ TPM_MEDIUM,
+ TPM_UNDEFINED,
+ TPM_SHORT,
+ TPM_SHORT, /* 125 */
+ TPM_SHORT,
+ TPM_LONG,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT, /* 130 */
+ TPM_MEDIUM,
+ TPM_UNDEFINED,
+ TPM_SHORT,
+ TPM_MEDIUM,
+ TPM_UNDEFINED, /* 135 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT, /* 140 */
+ TPM_SHORT,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED, /* 145 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT, /* 150 */
+ TPM_MEDIUM,
+ TPM_MEDIUM,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_UNDEFINED, /* 155 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT, /* 160 */
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED, /* 165 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_LONG, /* 170 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED, /* 175 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_MEDIUM, /* 180 */
+ TPM_SHORT,
+ TPM_MEDIUM,
+ TPM_MEDIUM,
+ TPM_MEDIUM,
+ TPM_MEDIUM, /* 185 */
+ TPM_SHORT,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED, /* 190 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED, /* 195 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT, /* 200 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT,
+ TPM_SHORT, /* 205 */
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_MEDIUM, /* 210 */
+ TPM_UNDEFINED,
+ TPM_MEDIUM,
+ TPM_MEDIUM,
+ TPM_MEDIUM,
+ TPM_UNDEFINED, /* 215 */
+ TPM_MEDIUM,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT,
+ TPM_SHORT, /* 220 */
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_UNDEFINED, /* 225 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT, /* 230 */
+ TPM_LONG,
+ TPM_MEDIUM,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED, /* 235 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT, /* 240 */
+ TPM_UNDEFINED,
+ TPM_MEDIUM,
+};
static void user_reader_timeout(unsigned long ptr)
{
schedule_work(&chip->work);
}
-static void timeout_work(void * ptr)
+static void timeout_work(void *ptr)
{
struct tpm_chip *chip = ptr;
down(&chip->buffer_mutex);
atomic_set(&chip->data_pending, 0);
+#ifndef CONFIG_XEN
+ memset(chip->data_buffer, 0, TPM_BUFSIZE);
+#else
memset(chip->data_buffer, 0, get_chip_buffersize(chip));
+#endif
up(&chip->buffer_mutex);
}
+/*
+ * Returns max number of jiffies to wait
+ */
+unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip,
+ u32 ordinal)
+{
+ int duration_idx = TPM_UNDEFINED;
+ int duration = 0;
+
+ if (ordinal < TPM_MAX_ORDINAL)
+ duration_idx = tpm_ordinal_duration[ordinal];
+ else if ((ordinal & TPM_PROTECTED_ORDINAL_MASK) <
+ TPM_MAX_PROTECTED_ORDINAL)
+ duration_idx =
+ tpm_protected_ordinal_duration[ordinal &
+ TPM_PROTECTED_ORDINAL_MASK];
+
+ if (duration_idx != TPM_UNDEFINED)
+ duration = chip->vendor.duration[duration_idx];
+ if (duration <= 0)
+ return 2 * 60 * HZ;
+ else
+ return duration;
+}
+EXPORT_SYMBOL_GPL(tpm_calc_ordinal_duration);
+
/*
* Internal kernel interface to transmit TPM commands
*/
-static ssize_t tpm_transmit(struct tpm_chip * chip, const char *buf,
+static ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
size_t bufsiz)
{
ssize_t rc;
- u32 count;
+ u32 count, ordinal;
unsigned long stop;
count = be32_to_cpu(*((__be32 *) (buf + 2)));
-
+ ordinal = be32_to_cpu(*((__be32 *) (buf + 6)));
if (count == 0)
return -ENODATA;
if (count > bufsiz) {
down(&chip->tpm_mutex);
- if ((rc = chip->vendor->send(chip, (u8 *) buf, count)) < 0) {
+ if ((rc = chip->vendor.send(chip, (u8 *) buf, count)) < 0) {
dev_err(chip->dev,
"tpm_transmit: tpm_send: error %zd\n", rc);
goto out;
}
- stop = jiffies + 2 * 60 * HZ;
+ if (chip->vendor.irq)
+ goto out_recv;
+
+ stop = jiffies + tpm_calc_ordinal_duration(chip, ordinal);
do {
- u8 status = chip->vendor->status(chip);
- if ((status & chip->vendor->req_complete_mask) ==
- chip->vendor->req_complete_val) {
+ u8 status = chip->vendor.status(chip);
+ if ((status & chip->vendor.req_complete_mask) ==
+ chip->vendor.req_complete_val)
goto out_recv;
- }
- if ((status == chip->vendor->req_canceled)) {
+ if ((status == chip->vendor.req_canceled)) {
dev_err(chip->dev, "Operation Canceled\n");
rc = -ECANCELED;
goto out;
rmb();
} while (time_before(jiffies, stop));
-
- chip->vendor->cancel(chip);
+ chip->vendor.cancel(chip);
dev_err(chip->dev, "Operation Timed out\n");
rc = -ETIME;
goto out;
out_recv:
- rc = chip->vendor->recv(chip, (u8 *) buf, bufsiz);
+ rc = chip->vendor.recv(chip, (u8 *) buf, bufsiz);
if (rc < 0)
dev_err(chip->dev,
"tpm_transmit: tpm_recv: error %zd\n", rc);
}
#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_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,
+};
+
+/*
+ * 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;
+}
+
+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 = msecs_to_jiffies(timeout);
+ timeout =
+ be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_2_IDX)));
+ if (timeout)
+ chip->vendor.timeout_b = msecs_to_jiffies(timeout);
+ timeout =
+ be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_3_IDX)));
+ if (timeout)
+ chip->vendor.timeout_c = msecs_to_jiffies(timeout);
+ timeout =
+ be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_4_IDX)));
+ if (timeout)
+ chip->vendor.timeout_d = msecs_to_jiffies(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] =
+ msecs_to_jiffies(be32_to_cpu
+ (*((__be32 *) (data +
+ TPM_GET_CAP_RET_UINT32_1_IDX))));
+ chip->vendor.duration[TPM_MEDIUM] =
+ msecs_to_jiffies(be32_to_cpu
+ (*((__be32 *) (data +
+ TPM_GET_CAP_RET_UINT32_2_IDX))));
+ chip->vendor.duration[TPM_LONG] =
+ msecs_to_jiffies(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 */
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[max_t(int, max(ARRAY_SIZE(tpm_cap), ARRAY_SIZE(pcrread)), 30)];
+ ssize_t rc;
int i, j, num_pcrs;
__be32 index;
char *str = buf;
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));
char *buf)
{
u8 *data;
- ssize_t len;
+ ssize_t err;
int i, rc;
char *str = buf;
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
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_1_2 0x1A
+#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[max_t(int, max(ARRAY_SIZE(tpm_cap), ARRAY_SIZE(cap_version)), 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);
+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)
{
if (chip == NULL)
return 0;
- chip->vendor->cancel(chip);
+ chip->vendor.cancel(chip);
return count;
}
EXPORT_SYMBOL_GPL(tpm_store_cancel);
spin_lock(&driver_lock);
list_for_each_entry(pos, &tpm_chip_list, list) {
- if (pos->vendor->miscdev.minor == minor) {
+ if (pos->vendor.miscdev.minor == minor) {
chip = pos;
break;
}
spin_unlock(&driver_lock);
- chip->data_buffer = kmalloc(get_chip_buffersize(chip) * sizeof(u8), GFP_KERNEL);
+#ifndef CONFIG_XEN
+ chip->data_buffer = kmalloc(TPM_BUFSIZE * sizeof(u8), GFP_KERNEL);
+#else
+ chip->data_buffer = kmalloc(get_chip_buffersize(chip) * sizeof(u8),
+ GFP_KERNEL);
+#endif
if (chip->data_buffer == NULL) {
chip->num_opens--;
put_device(chip->dev);
EXPORT_SYMBOL_GPL(tpm_release);
ssize_t tpm_write(struct file *file, const char __user *buf,
- size_t size, loff_t * off)
+ size_t size, loff_t *off)
{
struct tpm_chip *chip = file->private_data;
int in_size = size, out_size;
down(&chip->buffer_mutex);
+#ifndef CONFIG_XEN
+ if (in_size > TPM_BUFSIZE)
+ in_size = TPM_BUFSIZE;
+#else
if (in_size > get_chip_buffersize(chip))
in_size = get_chip_buffersize(chip);
+#endif
if (copy_from_user
(chip->data_buffer, (void __user *) buf, in_size)) {
}
/* atomic tpm command send and result receive */
- out_size = tpm_transmit(chip, chip->data_buffer,
+#ifndef CONFIG_XEN
+ out_size = tpm_transmit(chip, chip->data_buffer, TPM_BUFSIZE);
+#else
+ out_size = tpm_transmit(chip, chip->data_buffer,
get_chip_buffersize(chip));
+#endif
atomic_set(&chip->data_pending, out_size);
+#ifdef CONFIG_XEN
atomic_set(&chip->data_position, 0);
+#endif
up(&chip->buffer_mutex);
/* Set a timeout by which the reader must come claim the result */
return in_size;
}
-
EXPORT_SYMBOL_GPL(tpm_write);
-ssize_t tpm_read(struct file * file, char __user *buf,
- size_t size, loff_t * off)
+ssize_t tpm_read(struct file *file, char __user *buf,
+ size_t size, loff_t *off)
{
struct tpm_chip *chip = file->private_data;
int ret_size;
+#ifdef CONFIG_XEN
int pos, pending = 0;
+#endif
+#ifndef CONFIG_XEN
+ del_singleshot_timer_sync(&chip->user_read_timer);
+ flush_scheduled_work();
+#endif
ret_size = atomic_read(&chip->data_pending);
+#ifndef CONFIG_XEN
+ atomic_set(&chip->data_pending, 0);
+#endif
if (ret_size > 0) { /* relay data */
if (size < ret_size)
ret_size = size;
+#ifdef CONFIG_XEN
pos = atomic_read(&chip->data_position);
-
+#endif
down(&chip->buffer_mutex);
+#ifndef CONFIG_XEN
+ if (copy_to_user(buf, chip->data_buffer, ret_size))
+#else
if (copy_to_user(buf, &chip->data_buffer[pos], ret_size)) {
+#endif
ret_size = -EFAULT;
+#ifdef CONFIG_XEN
} else {
pending = atomic_read(&chip->data_pending) - ret_size;
if ( pending ) {
- atomic_set( &chip->data_pending, pending );
- atomic_set( &chip->data_position, pos+ret_size );
+ atomic_set(&chip->data_pending, pending);
+ atomic_set(&chip->data_position,
+ pos+ret_size);
}
}
+#endif
up(&chip->buffer_mutex);
}
-
- if ( ret_size <= 0 || pending == 0 ) {
- atomic_set( &chip->data_pending, 0 );
+
+#ifdef CONFIG_XEN
+ if ( ret_size <= 0 || pending == 0 ) {
+ atomic_set(&chip->data_pending, 0);
del_singleshot_timer_sync(&chip->user_read_timer);
flush_scheduled_work();
}
-
+#endif
return ret_size;
}
EXPORT_SYMBOL_GPL(tpm_read);
spin_unlock(&driver_lock);
dev_set_drvdata(dev, NULL);
- misc_deregister(&chip->vendor->miscdev);
- kfree(chip->vendor->miscdev.name);
+ misc_deregister(&chip->vendor.miscdev);
+ kfree(chip->vendor.miscdev.name);
- sysfs_remove_group(&dev->kobj, chip->vendor->attr_group);
+ sysfs_remove_group(&dev->kobj, chip->vendor.attr_group);
tpm_bios_log_teardown(chip->bios_dir);
- dev_mask[chip->dev_num / TPM_NUM_MASK_ENTRIES ] &=
- ~(1 << (chip->dev_num % TPM_NUM_MASK_ENTRIES));
+ clear_bit(chip->dev_num, dev_mask);
kfree(chip);
* upon errant exit from this function specific probe function should call
* pci_disable_device
*/
-int tpm_register_hardware(struct device *dev, struct tpm_vendor_specific *entry)
+struct tpm_chip *tpm_register_hardware(struct device *dev, const struct tpm_vendor_specific
+ *entry)
{
#define DEVNAME_SIZE 7
char *devname;
struct tpm_chip *chip;
- int i, j;
/* Driver specific per-device data */
chip = kzalloc(sizeof(*chip), GFP_KERNEL);
if (chip == NULL)
- return -ENOMEM;
+ return NULL;
init_MUTEX(&chip->buffer_mutex);
init_MUTEX(&chip->tpm_mutex);
chip->user_read_timer.function = user_reader_timeout;
chip->user_read_timer.data = (unsigned long) chip;
- chip->vendor = entry;
-
- if (entry->buffersize < TPM_MIN_BUFSIZE) {
- entry->buffersize = TPM_MIN_BUFSIZE;
- } else if (entry->buffersize > TPM_MAX_BUFSIZE) {
- entry->buffersize = TPM_MAX_BUFSIZE;
- }
-
- chip->dev_num = -1;
+ memcpy(&chip->vendor, entry, sizeof(struct tpm_vendor_specific));
- for (i = 0; i < TPM_NUM_MASK_ENTRIES; i++)
- for (j = 0; j < 8 * sizeof(int); j++)
- if ((dev_mask[i] & (1 << j)) == 0) {
- chip->dev_num =
- i * TPM_NUM_MASK_ENTRIES + j;
- dev_mask[i] |= 1 << j;
- goto dev_num_search_complete;
- }
+ chip->dev_num = find_first_zero_bit(dev_mask, TPM_NUM_DEVICES);
-dev_num_search_complete:
- if (chip->dev_num < 0) {
+ if (chip->dev_num >= TPM_NUM_DEVICES) {
dev_err(dev, "No available tpm device numbers\n");
kfree(chip);
- return -ENODEV;
+ return NULL;
} else if (chip->dev_num == 0)
- chip->vendor->miscdev.minor = TPM_MINOR;
+ chip->vendor.miscdev.minor = TPM_MINOR;
else
- chip->vendor->miscdev.minor = MISC_DYNAMIC_MINOR;
+ chip->vendor.miscdev.minor = MISC_DYNAMIC_MINOR;
+
+ set_bit(chip->dev_num, dev_mask);
devname = kmalloc(DEVNAME_SIZE, GFP_KERNEL);
scnprintf(devname, DEVNAME_SIZE, "%s%d", "tpm", chip->dev_num);
- chip->vendor->miscdev.name = devname;
+ chip->vendor.miscdev.name = devname;
- chip->vendor->miscdev.dev = dev;
+ chip->vendor.miscdev.dev = dev;
chip->dev = get_device(dev);
- if (misc_register(&chip->vendor->miscdev)) {
+ if (misc_register(&chip->vendor.miscdev)) {
dev_err(chip->dev,
"unable to misc_register %s, minor %d\n",
- chip->vendor->miscdev.name,
- chip->vendor->miscdev.minor);
+ chip->vendor.miscdev.name,
+ chip->vendor.miscdev.minor);
put_device(dev);
+ clear_bit(chip->dev_num, dev_mask);
kfree(chip);
- dev_mask[i] &= !(1 << j);
- return -ENODEV;
+ return NULL;
}
spin_lock(&driver_lock);
spin_unlock(&driver_lock);
- sysfs_create_group(&dev->kobj, chip->vendor->attr_group);
+ sysfs_create_group(&dev->kobj, chip->vendor.attr_group);
chip->bios_dir = tpm_bios_log_setup(devname);
- return 0;
+ return chip;
}
EXPORT_SYMBOL_GPL(tpm_register_hardware);
STATUS_READY = 0x04
};
-#define MIN(x,y) ((x) < (y)) ? (x) : (y)
-
struct transmission {
struct list_head next;
TRANSMISSION_FLAG_WAS_QUEUED = 0x1
};
-struct vtpm_state {
- struct transmission *current_request;
- spinlock_t req_list_lock;
- wait_queue_head_t req_wait_queue;
-
- struct list_head queued_requests;
-
- struct transmission *current_response;
- spinlock_t resp_list_lock;
- wait_queue_head_t resp_wait_queue; // processes waiting for responses
-
- struct transmission *req_cancelled; // if a cancellation was encounterd
-
- u8 vd_status;
- u8 flags;
-
- unsigned long disconnect_time;
-
- struct tpm_virtual_device *tpmvd;
-};
enum {
DATAEX_FLAG_QUEUED_ONLY = 0x1
/* local variables */
-static struct vtpm_state *vtpms;
/* local function prototypes */
static int _vtpm_send_queued(struct tpm_chip *chip);
/*
* Lower layer uses this function to make a response available.
*/
-int vtpm_vd_recv(const unsigned char *buffer, size_t count, const void *ptr)
+int vtpm_vd_recv(const struct tpm_chip *chip,
+ const unsigned char *buffer, size_t count,
+ void *ptr)
{
unsigned long flags;
int ret_size = 0;
struct transmission *t;
+ struct vtpm_state *vtpms;
+
+ vtpms = (struct vtpm_state *)chip_get_private(chip);
/*
* The list with requests must contain one request
*/
spin_lock_irqsave(&vtpms->resp_list_lock, flags);
if (vtpms->current_request != ptr) {
- printk("WARNING: The request pointer is different than the "
- "pointer the shared memory driver returned to me. "
- "%p != %p\n",
- vtpms->current_request, ptr);
- }
-
- /*
- * If the request has been cancelled, just quit here
- */
- if (vtpms->req_cancelled == (struct transmission *)ptr) {
- if (vtpms->current_request == vtpms->req_cancelled) {
- vtpms->current_request = NULL;
- }
- transmission_free(vtpms->req_cancelled);
- vtpms->req_cancelled = NULL;
spin_unlock_irqrestore(&vtpms->resp_list_lock, flags);
return 0;
}
- if (NULL != (t = vtpms->current_request)) {
+ if ((t = vtpms->current_request)) {
transmission_free(t);
vtpms->current_request = NULL;
}
/*
* Lower layer indicates its status (connected/disconnected)
*/
-void vtpm_vd_status(u8 vd_status)
+void vtpm_vd_status(const struct tpm_chip *chip, u8 vd_status)
{
+ struct vtpm_state *vtpms;
+
+ vtpms = (struct vtpm_state *)chip_get_private(chip);
+
vtpms->vd_status = vd_status;
if ((vtpms->vd_status & TPM_VD_STATUS_CONNECTED) == 0) {
vtpms->disconnect_time = jiffies;
{
int rc = 0;
unsigned long flags;
+ struct vtpm_state *vtpms;
+
+ vtpms = (struct vtpm_state *)chip_get_private(chip);
/*
* Check if the previous operation only queued the command
* Return a response of up to 30 '0's.
*/
- count = MIN(count, 30);
+ count = min_t(size_t, count, 30);
memset(buf, 0x0, count);
return count;
}
if (vtpms->current_response) {
struct transmission *t = vtpms->current_response;
vtpms->current_response = NULL;
- rc = MIN(count, t->response_len);
+ rc = min(count, t->response_len);
memcpy(buf, t->response, rc);
transmission_free(t);
}
int rc = 0;
unsigned long flags;
struct transmission *t = transmission_alloc();
+ struct vtpm_state *vtpms;
+
+ vtpms = (struct vtpm_state *)chip_get_private(chip);
if (!t)
return -ENOMEM;
vtpms->current_request = t;
- rc = vtpm_vd_send(chip,
- vtpms->tpmvd->tpm_private,
+ rc = vtpm_vd_send(vtpms->tpm_private,
buf,
count,
t);
int error = 0;
long flags;
unsigned char buffer[1];
+ struct vtpm_state *vtpms;
+ vtpms = (struct vtpm_state *)chip_get_private(chip);
spin_lock_irqsave(&vtpms->req_list_lock, flags);
vtpms->current_request = qt;
spin_unlock_irqrestore(&vtpms->req_list_lock, flags);
- rc = vtpm_vd_send(chip,
- vtpms->tpmvd->tpm_private,
+ rc = vtpm_vd_send(vtpms->tpm_private,
qt->request,
qt->request_len,
qt);
static void vtpm_cancel(struct tpm_chip *chip)
{
unsigned long flags;
+ struct vtpm_state *vtpms = (struct vtpm_state *)chip_get_private(chip);
+
spin_lock_irqsave(&vtpms->resp_list_lock,flags);
- vtpms->req_cancelled = vtpms->current_request;
+ if (!vtpms->current_response && vtpms->current_request) {
+ spin_unlock_irqrestore(&vtpms->resp_list_lock, flags);
+ interruptible_sleep_on(&vtpms->resp_wait_queue);
+ spin_lock_irqsave(&vtpms->resp_list_lock,flags);
+ }
+
+ if (vtpms->current_response) {
+ struct transmission *t = vtpms->current_response;
+ vtpms->current_response = NULL;
+ transmission_free(t);
+ }
spin_unlock_irqrestore(&vtpms->resp_list_lock,flags);
}
{
u8 rc = 0;
unsigned long flags;
+ struct vtpm_state *vtpms;
+
+ vtpms = (struct vtpm_state *)chip_get_private(chip);
spin_lock_irqsave(&vtpms->resp_list_lock, flags);
/*
if (vtpms->current_response ||
0 != (vtpms->flags & DATAEX_FLAG_QUEUED_ONLY)) {
rc = STATUS_DATA_AVAIL;
+ } else if (!vtpms->current_response && !vtpms->current_request) {
+ rc = STATUS_READY;
}
+
spin_unlock_irqrestore(&vtpms->resp_list_lock, flags);
return rc;
}
static DEVICE_ATTR(pubek, S_IRUGO, tpm_show_pubek, NULL);
static DEVICE_ATTR(pcrs, S_IRUGO, tpm_show_pcrs, NULL);
+static DEVICE_ATTR(enabled, S_IRUGO, tpm_show_enabled, NULL);
+static DEVICE_ATTR(active, S_IRUGO, tpm_show_active, NULL);
+static DEVICE_ATTR(owned, S_IRUGO, tpm_show_owned, NULL);
+static DEVICE_ATTR(temp_deactivated, S_IRUGO, tpm_show_temp_deactivated,
+ NULL);
static DEVICE_ATTR(caps, S_IRUGO, tpm_show_caps, NULL);
static DEVICE_ATTR(cancel, S_IWUSR |S_IWGRP, NULL, tpm_store_cancel);
static struct attribute *vtpm_attrs[] = {
&dev_attr_pubek.attr,
&dev_attr_pcrs.attr,
+ &dev_attr_enabled.attr,
+ &dev_attr_active.attr,
+ &dev_attr_owned.attr,
+ &dev_attr_temp_deactivated.attr,
&dev_attr_caps.attr,
&dev_attr_cancel.attr,
NULL,
static struct attribute_group vtpm_attr_grp = { .attrs = vtpm_attrs };
+#define TPM_LONG_TIMEOUT (10 * 60 * HZ)
+
static struct tpm_vendor_specific tpm_vtpm = {
.recv = vtpm_recv,
.send = vtpm_send,
.req_complete_mask = STATUS_BUSY | STATUS_DATA_AVAIL,
.req_complete_val = STATUS_DATA_AVAIL,
.req_canceled = STATUS_READY,
- .base = 0,
.attr_group = &vtpm_attr_grp,
.miscdev = {
.fops = &vtpm_ops,
},
+ .duration = {
+ TPM_LONG_TIMEOUT,
+ TPM_LONG_TIMEOUT,
+ TPM_LONG_TIMEOUT,
+ },
};
-static struct platform_device *pdev;
-
-int __init init_vtpm(struct tpm_virtual_device *tvd)
+struct tpm_chip *init_vtpm(struct device *dev,
+ struct tpm_virtual_device *tvd,
+ struct tpm_private *tp)
{
- int rc;
-
- /* vtpms is global - only allow one user */
- if (vtpms)
- return -EBUSY;
+ long rc;
+ struct tpm_chip *chip;
+ struct vtpm_state *vtpms;
vtpms = kzalloc(sizeof(struct vtpm_state), GFP_KERNEL);
if (!vtpms)
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
vtpm_state_init(vtpms);
vtpms->tpmvd = tvd;
-
- pdev = platform_device_register_simple("tpm_vtpm", -1, NULL, 0);
- if (IS_ERR(pdev)) {
- rc = PTR_ERR(pdev);
- goto err_free_mem;
- }
+ vtpms->tpm_private = tp;
if (tvd)
tpm_vtpm.buffersize = tvd->max_tx_size;
- if ((rc = tpm_register_hardware(&pdev->dev, &tpm_vtpm)) < 0) {
- goto err_unreg_pdev;
+ chip = tpm_register_hardware(dev, &tpm_vtpm);
+ if (!chip) {
+ rc = -ENODEV;
+ goto err_free_mem;
}
- return 0;
+ chip_set_private(chip, vtpms);
+
+ return chip;
-err_unreg_pdev:
- platform_device_unregister(pdev);
err_free_mem:
kfree(vtpms);
- vtpms = NULL;
- return rc;
+ return ERR_PTR(rc);
}
-void __exit cleanup_vtpm(void)
+void cleanup_vtpm(struct device *dev)
{
- struct tpm_chip *chip = dev_get_drvdata(&pdev->dev);
- if (chip) {
- tpm_remove_hardware(chip->dev);
- platform_device_unregister(pdev);
- }
+ struct tpm_chip *chip = dev_get_drvdata(dev);
+ struct vtpm_state *vtpms = (struct vtpm_state*)chip_get_private(chip);
+ tpm_remove_hardware(dev);
kfree(vtpms);
- vtpms = NULL;
}
projects / xen.git / commitdiff