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-rw-r--r--Documentation/devicetree/bindings/security/tpm/tpm-i2c.txt6
-rw-r--r--drivers/char/tpm/tpm-interface.c10
-rw-r--r--drivers/char/tpm/tpm.h9
-rw-r--r--drivers/char/tpm/tpm2-cmd.c2
-rw-r--r--drivers/char/tpm/tpm_crb.c2
-rw-r--r--drivers/char/tpm/tpm_ibmvtpm.c98
-rw-r--r--drivers/char/tpm/tpm_infineon.c6
-rw-r--r--drivers/char/tpm/tpm_tis_core.c8
8 files changed, 89 insertions, 52 deletions
diff --git a/Documentation/devicetree/bindings/security/tpm/tpm-i2c.txt b/Documentation/devicetree/bindings/security/tpm/tpm-i2c.txt
index 3eca6de6369d..a65d7b71e81a 100644
--- a/Documentation/devicetree/bindings/security/tpm/tpm-i2c.txt
+++ b/Documentation/devicetree/bindings/security/tpm/tpm-i2c.txt
@@ -8,6 +8,12 @@ Required properties:
the firmware event log
- linux,sml-size : size of the memory allocated for the firmware event log
+Optional properties:
+
+- powered-while-suspended: present when the TPM is left powered on between
+ suspend and resume (makes the suspend/resume
+ callbacks do nothing).
+
Example (for OpenPower Systems with Nuvoton TPM 2.0 on I2C)
----------------------------------------------------------
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index fe597e6c55c4..1d6729be4cd6 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -455,7 +455,7 @@ ssize_t tpm_transmit(struct tpm_chip *chip, struct tpm_space *space,
goto out;
}
- msleep(TPM_TIMEOUT); /* CHECK */
+ tpm_msleep(TPM_TIMEOUT);
rmb();
} while (time_before(jiffies, stop));
@@ -970,7 +970,7 @@ int tpm_do_selftest(struct tpm_chip *chip)
dev_info(
&chip->dev, HW_ERR
"TPM command timed out during continue self test");
- msleep(delay_msec);
+ tpm_msleep(delay_msec);
continue;
}
@@ -985,7 +985,7 @@ int tpm_do_selftest(struct tpm_chip *chip)
}
if (rc != TPM_WARN_DOING_SELFTEST)
return rc;
- msleep(delay_msec);
+ tpm_msleep(delay_msec);
} while (--loops > 0);
return rc;
@@ -1085,7 +1085,7 @@ again:
}
} else {
do {
- msleep(TPM_TIMEOUT);
+ tpm_msleep(TPM_TIMEOUT);
status = chip->ops->status(chip);
if ((status & mask) == mask)
return 0;
@@ -1150,7 +1150,7 @@ int tpm_pm_suspend(struct device *dev)
*/
if (rc != TPM_WARN_RETRY)
break;
- msleep(TPM_TIMEOUT_RETRY);
+ tpm_msleep(TPM_TIMEOUT_RETRY);
}
if (rc)
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 04fbff2edbf3..2d5466a72e40 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -50,7 +50,8 @@ enum tpm_const {
enum tpm_timeout {
TPM_TIMEOUT = 5, /* msecs */
- TPM_TIMEOUT_RETRY = 100 /* msecs */
+ TPM_TIMEOUT_RETRY = 100, /* msecs */
+ TPM_TIMEOUT_RANGE_US = 300 /* usecs */
};
/* TPM addresses */
@@ -527,6 +528,12 @@ int tpm_pm_resume(struct device *dev);
int wait_for_tpm_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout,
wait_queue_head_t *queue, bool check_cancel);
+static inline void tpm_msleep(unsigned int delay_msec)
+{
+ usleep_range(delay_msec * 1000,
+ (delay_msec * 1000) + TPM_TIMEOUT_RANGE_US);
+};
+
struct tpm_chip *tpm_chip_find_get(int chip_num);
__must_check int tpm_try_get_ops(struct tpm_chip *chip);
void tpm_put_ops(struct tpm_chip *chip);
diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
index f7f34b2aa981..e1a41b788f08 100644
--- a/drivers/char/tpm/tpm2-cmd.c
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -899,7 +899,7 @@ static int tpm2_do_selftest(struct tpm_chip *chip)
if (rc != TPM2_RC_TESTING)
break;
- msleep(delay_msec);
+ tpm_msleep(delay_msec);
}
return rc;
diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c
index a4ac63a21d8a..8f0a98dea327 100644
--- a/drivers/char/tpm/tpm_crb.c
+++ b/drivers/char/tpm/tpm_crb.c
@@ -665,7 +665,7 @@ static const struct dev_pm_ops crb_pm = {
SET_RUNTIME_PM_OPS(crb_pm_runtime_suspend, crb_pm_runtime_resume, NULL)
};
-static struct acpi_device_id crb_device_ids[] = {
+static const struct acpi_device_id crb_device_ids[] = {
{"MSFT0101", 0},
{"", 0},
};
diff --git a/drivers/char/tpm/tpm_ibmvtpm.c b/drivers/char/tpm/tpm_ibmvtpm.c
index f01d083eced2..25f6e2665385 100644
--- a/drivers/char/tpm/tpm_ibmvtpm.c
+++ b/drivers/char/tpm/tpm_ibmvtpm.c
@@ -32,26 +32,70 @@
static const char tpm_ibmvtpm_driver_name[] = "tpm_ibmvtpm";
-static struct vio_device_id tpm_ibmvtpm_device_table[] = {
+static const struct vio_device_id tpm_ibmvtpm_device_table[] = {
{ "IBM,vtpm", "IBM,vtpm"},
{ "", "" }
};
MODULE_DEVICE_TABLE(vio, tpm_ibmvtpm_device_table);
/**
+ *
+ * ibmvtpm_send_crq_word - Send a CRQ request
+ * @vdev: vio device struct
+ * @w1: pre-constructed first word of tpm crq (second word is reserved)
+ *
+ * Return:
+ * 0 - Success
+ * Non-zero - Failure
+ */
+static int ibmvtpm_send_crq_word(struct vio_dev *vdev, u64 w1)
+{
+ return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, w1, 0);
+}
+
+/**
+ *
* ibmvtpm_send_crq - Send a CRQ request
*
* @vdev: vio device struct
- * @w1: first word
- * @w2: second word
+ * @valid: Valid field
+ * @msg: Type field
+ * @len: Length field
+ * @data: Data field
+ *
+ * The ibmvtpm crq is defined as follows:
+ *
+ * Byte | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7
+ * -----------------------------------------------------------------------
+ * Word0 | Valid | Type | Length | Data
+ * -----------------------------------------------------------------------
+ * Word1 | Reserved
+ * -----------------------------------------------------------------------
+ *
+ * Which matches the following structure (on bigendian host):
+ *
+ * struct ibmvtpm_crq {
+ * u8 valid;
+ * u8 msg;
+ * __be16 len;
+ * __be32 data;
+ * __be64 reserved;
+ * } __attribute__((packed, aligned(8)));
+ *
+ * However, the value is passed in a register so just compute the numeric value
+ * to load into the register avoiding byteswap altogether. Endian only affects
+ * memory loads and stores - registers are internally represented the same.
*
* Return:
- * 0 -Sucess
+ * 0 (H_SUCCESS) - Success
* Non-zero - Failure
*/
-static int ibmvtpm_send_crq(struct vio_dev *vdev, u64 w1, u64 w2)
+static int ibmvtpm_send_crq(struct vio_dev *vdev,
+ u8 valid, u8 msg, u16 len, u32 data)
{
- return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, w1, w2);
+ u64 w1 = ((u64)valid << 56) | ((u64)msg << 48) | ((u64)len << 32) |
+ (u64)data;
+ return ibmvtpm_send_crq_word(vdev, w1);
}
/**
@@ -109,8 +153,6 @@ static int tpm_ibmvtpm_recv(struct tpm_chip *chip, u8 *buf, size_t count)
static int tpm_ibmvtpm_send(struct tpm_chip *chip, u8 *buf, size_t count)
{
struct ibmvtpm_dev *ibmvtpm = dev_get_drvdata(&chip->dev);
- struct ibmvtpm_crq crq;
- __be64 *word = (__be64 *)&crq;
int rc, sig;
if (!ibmvtpm->rtce_buf) {
@@ -137,10 +179,6 @@ static int tpm_ibmvtpm_send(struct tpm_chip *chip, u8 *buf, size_t count)
spin_lock(&ibmvtpm->rtce_lock);
ibmvtpm->res_len = 0;
memcpy((void *)ibmvtpm->rtce_buf, (void *)buf, count);
- crq.valid = (u8)IBMVTPM_VALID_CMD;
- crq.msg = (u8)VTPM_TPM_COMMAND;
- crq.len = cpu_to_be16(count);
- crq.data = cpu_to_be32(ibmvtpm->rtce_dma_handle);
/*
* set the processing flag before the Hcall, since we may get the
@@ -148,8 +186,9 @@ static int tpm_ibmvtpm_send(struct tpm_chip *chip, u8 *buf, size_t count)
*/
ibmvtpm->tpm_processing_cmd = true;
- rc = ibmvtpm_send_crq(ibmvtpm->vdev, be64_to_cpu(word[0]),
- be64_to_cpu(word[1]));
+ rc = ibmvtpm_send_crq(ibmvtpm->vdev,
+ IBMVTPM_VALID_CMD, VTPM_TPM_COMMAND,
+ count, ibmvtpm->rtce_dma_handle);
if (rc != H_SUCCESS) {
dev_err(ibmvtpm->dev, "tpm_ibmvtpm_send failed rc=%d\n", rc);
rc = 0;
@@ -182,15 +221,10 @@ static u8 tpm_ibmvtpm_status(struct tpm_chip *chip)
*/
static int ibmvtpm_crq_get_rtce_size(struct ibmvtpm_dev *ibmvtpm)
{
- struct ibmvtpm_crq crq;
- u64 *buf = (u64 *) &crq;
int rc;
- crq.valid = (u8)IBMVTPM_VALID_CMD;
- crq.msg = (u8)VTPM_GET_RTCE_BUFFER_SIZE;
-
- rc = ibmvtpm_send_crq(ibmvtpm->vdev, cpu_to_be64(buf[0]),
- cpu_to_be64(buf[1]));
+ rc = ibmvtpm_send_crq(ibmvtpm->vdev,
+ IBMVTPM_VALID_CMD, VTPM_GET_RTCE_BUFFER_SIZE, 0, 0);
if (rc != H_SUCCESS)
dev_err(ibmvtpm->dev,
"ibmvtpm_crq_get_rtce_size failed rc=%d\n", rc);
@@ -210,15 +244,10 @@ static int ibmvtpm_crq_get_rtce_size(struct ibmvtpm_dev *ibmvtpm)
*/
static int ibmvtpm_crq_get_version(struct ibmvtpm_dev *ibmvtpm)
{
- struct ibmvtpm_crq crq;
- u64 *buf = (u64 *) &crq;
int rc;
- crq.valid = (u8)IBMVTPM_VALID_CMD;
- crq.msg = (u8)VTPM_GET_VERSION;
-
- rc = ibmvtpm_send_crq(ibmvtpm->vdev, cpu_to_be64(buf[0]),
- cpu_to_be64(buf[1]));
+ rc = ibmvtpm_send_crq(ibmvtpm->vdev,
+ IBMVTPM_VALID_CMD, VTPM_GET_VERSION, 0, 0);
if (rc != H_SUCCESS)
dev_err(ibmvtpm->dev,
"ibmvtpm_crq_get_version failed rc=%d\n", rc);
@@ -238,7 +267,7 @@ static int ibmvtpm_crq_send_init_complete(struct ibmvtpm_dev *ibmvtpm)
{
int rc;
- rc = ibmvtpm_send_crq(ibmvtpm->vdev, INIT_CRQ_COMP_CMD, 0);
+ rc = ibmvtpm_send_crq_word(ibmvtpm->vdev, INIT_CRQ_COMP_CMD);
if (rc != H_SUCCESS)
dev_err(ibmvtpm->dev,
"ibmvtpm_crq_send_init_complete failed rc=%d\n", rc);
@@ -258,7 +287,7 @@ static int ibmvtpm_crq_send_init(struct ibmvtpm_dev *ibmvtpm)
{
int rc;
- rc = ibmvtpm_send_crq(ibmvtpm->vdev, INIT_CRQ_CMD, 0);
+ rc = ibmvtpm_send_crq_word(ibmvtpm->vdev, INIT_CRQ_CMD);
if (rc != H_SUCCESS)
dev_err(ibmvtpm->dev,
"ibmvtpm_crq_send_init failed rc=%d\n", rc);
@@ -340,15 +369,10 @@ static int tpm_ibmvtpm_suspend(struct device *dev)
{
struct tpm_chip *chip = dev_get_drvdata(dev);
struct ibmvtpm_dev *ibmvtpm = dev_get_drvdata(&chip->dev);
- struct ibmvtpm_crq crq;
- u64 *buf = (u64 *) &crq;
int rc = 0;
- crq.valid = (u8)IBMVTPM_VALID_CMD;
- crq.msg = (u8)VTPM_PREPARE_TO_SUSPEND;
-
- rc = ibmvtpm_send_crq(ibmvtpm->vdev, cpu_to_be64(buf[0]),
- cpu_to_be64(buf[1]));
+ rc = ibmvtpm_send_crq(ibmvtpm->vdev,
+ IBMVTPM_VALID_CMD, VTPM_PREPARE_TO_SUSPEND, 0, 0);
if (rc != H_SUCCESS)
dev_err(ibmvtpm->dev,
"tpm_ibmvtpm_suspend failed rc=%d\n", rc);
diff --git a/drivers/char/tpm/tpm_infineon.c b/drivers/char/tpm/tpm_infineon.c
index 3b1b9f9322d5..d8f10047fbba 100644
--- a/drivers/char/tpm/tpm_infineon.c
+++ b/drivers/char/tpm/tpm_infineon.c
@@ -191,7 +191,7 @@ static int wait(struct tpm_chip *chip, int wait_for_bit)
/* check the status-register if wait_for_bit is set */
if (status & 1 << wait_for_bit)
break;
- msleep(TPM_MSLEEP_TIME);
+ tpm_msleep(TPM_MSLEEP_TIME);
}
if (i == TPM_MAX_TRIES) { /* timeout occurs */
if (wait_for_bit == STAT_XFE)
@@ -226,7 +226,7 @@ static void tpm_wtx(struct tpm_chip *chip)
wait_and_send(chip, TPM_CTRL_WTX);
wait_and_send(chip, 0x00);
wait_and_send(chip, 0x00);
- msleep(TPM_WTX_MSLEEP_TIME);
+ tpm_msleep(TPM_WTX_MSLEEP_TIME);
}
static void tpm_wtx_abort(struct tpm_chip *chip)
@@ -237,7 +237,7 @@ static void tpm_wtx_abort(struct tpm_chip *chip)
wait_and_send(chip, 0x00);
wait_and_send(chip, 0x00);
number_of_wtx = 0;
- msleep(TPM_WTX_MSLEEP_TIME);
+ tpm_msleep(TPM_WTX_MSLEEP_TIME);
}
static int tpm_inf_recv(struct tpm_chip *chip, u8 * buf, size_t count)
diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index b617b2eeb080..63bc6c3b949e 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -51,7 +51,7 @@ static int wait_startup(struct tpm_chip *chip, int l)
if (access & TPM_ACCESS_VALID)
return 0;
- msleep(TPM_TIMEOUT);
+ tpm_msleep(TPM_TIMEOUT);
} while (time_before(jiffies, stop));
return -1;
}
@@ -117,7 +117,7 @@ again:
do {
if (check_locality(chip, l))
return l;
- msleep(TPM_TIMEOUT);
+ tpm_msleep(TPM_TIMEOUT);
} while (time_before(jiffies, stop));
}
return -1;
@@ -164,7 +164,7 @@ static int get_burstcount(struct tpm_chip *chip)
burstcnt = (value >> 8) & 0xFFFF;
if (burstcnt)
return burstcnt;
- msleep(TPM_TIMEOUT);
+ tpm_msleep(TPM_TIMEOUT);
} while (time_before(jiffies, stop));
return -EBUSY;
}
@@ -396,7 +396,7 @@ static int tpm_tis_send(struct tpm_chip *chip, u8 *buf, size_t len)
priv->irq = irq;
chip->flags |= TPM_CHIP_FLAG_IRQ;
if (!priv->irq_tested)
- msleep(1);
+ tpm_msleep(1);
if (!priv->irq_tested)
disable_interrupts(chip);
priv->irq_tested = true;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.