This patch set enables TPM2 protocol and provides drivers for FIFO and
CRB interfaces. This patch set does not export any sysfs attributes for
TPM 2.0 because existing sysfs attributes have three non-trivial issues:
- They are associated with the platform device instead of character
device.
- They are are not trivial key-value pairs but contain text that is
not easily parsed by a computer.
- Raciness as described in
http://kroah.com/log/blog/2013/06/26/how-to-create-a-sysfs-file-correctly/
v2:
- Improved struct tpm_chip life-cycle by taking advantage of devres
API.
- Refined sysfs attributes as simple key-values thereby not repeating
mistakes in TPM1 sysfs attributes.
- Documented functions in tpm-chip.c and tpm2-cmd.c.
- Documented sysfs attributes.
v3:
- Lots of fixes in calling order in device drivers (thanks to Jason
Gunthorpe for pointing these out!).
- Attach sysfs attributes to the misc device because it represents
TPM device to the user space.
v4:
- Disable sysfs attibutes for TPM 2.0 for until we can sort out the
best approach for them.
- Fixed all the style issues found with checkpatch.pl.
v5:
- missing EXPORT_SYMBOL_GPL()
- own class for TPM devices used for TPM 2.0 devices and onwards.
v6:
- Non-racy initialization for sysfs attributes using struct device's
groups field.
- The class 'tpm' is used now for all TPM devices. For the first device
node major MISC_MAJOR and minor TPM_MINOR is used in order to retain
backwards compatability.
v7:
- Release device number and free struct tpm_chip memory inside
tpm_dev_release callback.
- Moved code from tpm-interface.c and tpm_dev.c to tpm-chip.c.
v8:
- Cleaned up unneeded cast from tpm_transmit_cmd().
- Cleaned up redundant PPI_VERSION_LEN constant from tpm_ppi.c.
- Fixed tpm_tis to use tpm2_calc_ordinal_duration() for TPM2 devices.
- tpm_crb: in crb_recv, check that count can hold the TPM header at
minimum.
- tpm_crb: add enumerations for bit flags in start and cancel fields
of the control area.
- tpm_crb: use ioremap() for command and response buffer because
they might be anywhere.
- tpm_crb: use IO access functions for reading ioremapped buffers
because using direct pointers is not portable.
- tpm_crb: only apply ACPI start if start method reported by the
TPM2 ACPI table allows it.
- In tpm2_pcr_read() just calculate index and bit and get rid of
hacky loop.
- Do not add sysfs attributes for TPM 2.0 devices.
v9:
- Fixed compilation issues in v8 (sorry for not using the correct
tree).
- Just do "return tpm_chip_register();" instead of copying return
value to a variable.
- Removed unused tpm2_startup().
- In the CRB driver ACPI TPM2 table could contain platform specific
and therefore inequality test does not work. Fixed in this patch
set.
v10:
- Fixed coccicheck and sparse errors and other reported style errors.
- Fixed build errors without CONFIG_ACPI.
- Fixed build error with CONFIG_OF.
- Added TPM_CHIP_FLAG_REGISTERED to mark successful tpm_chip_register().
It is checked in the beginning of tpm_chip_unregister(), which is
called even when "attach" callback for a device fails because "detach"
callback is always called.
- Added TPM_CHIP_FLAG_PPI to mark successful PPI interface lookup because
in older TPM chips version string might be non-existent.
- Check TPM version from the 4th byte of STS register after requesting
the locality because otherwise the read will return bogus data.
- Some TPM chips just give 0xff as the 4th byte so using that for detecting
TPM family is unstable. Instead I chose the approach of using idempotent
TPM 2.x command to detect such case.
Jarkko Sakkinen (8):
tpm: merge duplicate transmit_cmd() functions
tpm: two-phase chip management functions
tpm: fix raciness of PPI interface lookup
tpm: rename chip->dev to chip->pdev
tpm: device class for tpm
tpm: TPM 2.0 baseline support
tpm: TPM 2.0 CRB Interface
tpm: TPM 2.0 FIFO Interface
Documentation/ABI/stable/sysfs-class-tpm | 22 +-
drivers/char/tpm/Kconfig | 9 +
drivers/char/tpm/Makefile | 3 +-
drivers/char/tpm/tpm-chip.c | 256 +++++++++++++
drivers/char/tpm/tpm-dev.c | 42 +--
drivers/char/tpm/tpm-interface.c | 263 +++++--------
drivers/char/tpm/tpm-sysfs.c | 29 +-
drivers/char/tpm/tpm.h | 118 +++++-
drivers/char/tpm/tpm2-cmd.c | 617 +++++++++++++++++++++++++++++++
drivers/char/tpm/tpm_atmel.c | 25 +-
drivers/char/tpm/tpm_crb.c | 354 ++++++++++++++++++
drivers/char/tpm/tpm_i2c_atmel.c | 55 +--
drivers/char/tpm/tpm_i2c_infineon.c | 43 +--
drivers/char/tpm/tpm_i2c_nuvoton.c | 71 ++--
drivers/char/tpm/tpm_i2c_stm_st33.c | 32 +-
drivers/char/tpm/tpm_ibmvtpm.c | 17 +-
drivers/char/tpm/tpm_infineon.c | 51 +--
drivers/char/tpm/tpm_nsc.c | 34 +-
drivers/char/tpm/tpm_ppi.c | 141 ++++---
drivers/char/tpm/tpm_tis.c | 224 ++++++-----
drivers/char/tpm/xen-tpmfront.c | 14 +-
21 files changed, 1820 insertions(+), 600 deletions(-)
create mode 100644 drivers/char/tpm/tpm-chip.c
create mode 100644 drivers/char/tpm/tpm2-cmd.c
create mode 100644 drivers/char/tpm/tpm_crb.c
--
2.1.0
Detect TPM 2.0 by sending idempotent TPM 2.x command. Ordinals for
TPM 2.0 are higher than TPM 1.x commands so this should be fail-safe.
Using STS3 is unreliable because some chips just report 0xff and not
what the spec says.
Before TPM family is detected, timeouts are set to the maximum values
for both TPM 1.x and TPM 2.x. In addition to this, suspend/resume
functionality is implemented for TPM 2.x.
Signed-off-by: Jarkko Sakkinen <[email protected]>
Signed-off-by: Will Arthur <[email protected]>
Reviewed-by: Jasob Gunthorpe <[email protected]>
Reviewed-by: Stephan Berger <[email protected]>
---
drivers/char/tpm/tpm_tis.c | 112 +++++++++++++++++++++++++++++++++++----------
1 file changed, 89 insertions(+), 23 deletions(-)
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index 89e1abb..c8884be 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -1,5 +1,6 @@
/*
* Copyright (C) 2005, 2006 IBM Corporation
+ * Copyright (C) 2014 Intel Corporation
*
* Authors:
* Leendert van Doorn <[email protected]>
@@ -64,12 +65,22 @@ enum tis_defaults {
TIS_LONG_TIMEOUT = 2000, /* 2 sec */
};
+
+/* Some timeout values are needed before it is known whether the chip is
+ * TPM 1.0 or TPM 2.0.
+ */
+#define TIS_TIMEOUT_A_MAX max(TIS_SHORT_TIMEOUT, TPM2_TIMEOUT_A)
+#define TIS_TIMEOUT_B_MAX max(TIS_LONG_TIMEOUT, TPM2_TIMEOUT_B)
+#define TIS_TIMEOUT_C_MAX max(TIS_SHORT_TIMEOUT, TPM2_TIMEOUT_C)
+#define TIS_TIMEOUT_D_MAX max(TIS_SHORT_TIMEOUT, TPM2_TIMEOUT_D)
+
#define TPM_ACCESS(l) (0x0000 | ((l) << 12))
#define TPM_INT_ENABLE(l) (0x0008 | ((l) << 12))
#define TPM_INT_VECTOR(l) (0x000C | ((l) << 12))
#define TPM_INT_STATUS(l) (0x0010 | ((l) << 12))
#define TPM_INTF_CAPS(l) (0x0014 | ((l) << 12))
#define TPM_STS(l) (0x0018 | ((l) << 12))
+#define TPM_STS3(l) (0x001b | ((l) << 12))
#define TPM_DATA_FIFO(l) (0x0024 | ((l) << 12))
#define TPM_DID_VID(l) (0x0F00 | ((l) << 12))
@@ -363,6 +374,7 @@ static int tpm_tis_send_main(struct tpm_chip *chip, u8 *buf, size_t len)
{
int rc;
u32 ordinal;
+ unsigned long dur;
rc = tpm_tis_send_data(chip, buf, len);
if (rc < 0)
@@ -374,9 +386,14 @@ static int tpm_tis_send_main(struct tpm_chip *chip, u8 *buf, size_t len)
if (chip->vendor.irq) {
ordinal = be32_to_cpu(*((__be32 *) (buf + 6)));
+
+ if (chip->flags & TPM_CHIP_FLAG_TPM2)
+ dur = tpm2_calc_ordinal_duration(chip, ordinal);
+ else
+ dur = tpm_calc_ordinal_duration(chip, ordinal);
+
if (wait_for_tpm_stat
- (chip, TPM_STS_DATA_AVAIL | TPM_STS_VALID,
- tpm_calc_ordinal_duration(chip, ordinal),
+ (chip, TPM_STS_DATA_AVAIL | TPM_STS_VALID, dur,
&chip->vendor.read_queue, false) < 0) {
rc = -ETIME;
goto out_err;
@@ -598,17 +615,19 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
return PTR_ERR(chip);
chip->vendor.priv = priv;
+#ifdef CONFIG_ACPI
chip->acpi_dev_handle = acpi_dev_handle;
+#endif
chip->vendor.iobase = devm_ioremap(dev, start, len);
if (!chip->vendor.iobase)
return -EIO;
- /* Default timeouts */
- chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
- chip->vendor.timeout_b = msecs_to_jiffies(TIS_LONG_TIMEOUT);
- chip->vendor.timeout_c = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
- chip->vendor.timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
+ /* Maximum timeouts */
+ chip->vendor.timeout_a = TIS_TIMEOUT_A_MAX;
+ chip->vendor.timeout_b = TIS_TIMEOUT_B_MAX;
+ chip->vendor.timeout_c = TIS_TIMEOUT_C_MAX;
+ chip->vendor.timeout_d = TIS_TIMEOUT_D_MAX;
if (wait_startup(chip, 0) != 0) {
rc = -ENODEV;
@@ -620,11 +639,18 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
goto out_err;
}
+ /* Every TPM 2.x command has a higher ordinal than TPM 1.x commands.
+ * Therefore, we can use an idempotent TPM 2.x command to probe TPM 2.x.
+ */
+ rc = tpm2_gen_interrupt(chip, true);
+ if (rc == 0 || rc == TPM2_RC_INITIALIZE)
+ chip->flags |= TPM_CHIP_FLAG_TPM2;
+
vendor = ioread32(chip->vendor.iobase + TPM_DID_VID(0));
chip->vendor.manufacturer_id = vendor;
- dev_info(dev,
- "1.2 TPM (device-id 0x%X, rev-id %d)\n",
+ dev_info(dev, "%s TPM (device-id 0x%X, rev-id %d)\n",
+ (chip->flags & TPM_CHIP_FLAG_TPM2) ? "2.0" : "1.2",
vendor >> 16, ioread8(chip->vendor.iobase + TPM_RID(0)));
if (!itpm) {
@@ -720,7 +746,10 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
chip->vendor.probed_irq = 0;
/* Generate Interrupts */
- tpm_gen_interrupt(chip);
+ if (chip->flags & TPM_CHIP_FLAG_TPM2)
+ tpm2_gen_interrupt(chip, false);
+ else
+ tpm_gen_interrupt(chip);
chip->vendor.irq = chip->vendor.probed_irq;
@@ -765,16 +794,44 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
}
}
- if (tpm_get_timeouts(chip)) {
- dev_err(dev, "Could not get TPM timeouts and durations\n");
- rc = -ENODEV;
- goto out_err;
- }
+ if (chip->flags & TPM_CHIP_FLAG_TPM2) {
+ chip->vendor.timeout_a = msecs_to_jiffies(TPM2_TIMEOUT_A);
+ chip->vendor.timeout_b = msecs_to_jiffies(TPM2_TIMEOUT_B);
+ chip->vendor.timeout_c = msecs_to_jiffies(TPM2_TIMEOUT_C);
+ chip->vendor.timeout_d = msecs_to_jiffies(TPM2_TIMEOUT_D);
+ chip->vendor.duration[TPM_SHORT] =
+ msecs_to_jiffies(TPM2_DURATION_SHORT);
+ chip->vendor.duration[TPM_MEDIUM] =
+ msecs_to_jiffies(TPM2_DURATION_MEDIUM);
+ chip->vendor.duration[TPM_LONG] =
+ msecs_to_jiffies(TPM2_DURATION_LONG);
+
+ rc = tpm2_do_selftest(chip);
+ if (rc == TPM2_RC_INITIALIZE) {
+ dev_warn(dev, "Firmware has not started TPM\n");
+ rc = tpm2_startup(chip, TPM2_SU_CLEAR);
+ if (!rc)
+ rc = tpm2_do_selftest(chip);
+ }
- if (tpm_do_selftest(chip)) {
- dev_err(dev, "TPM self test failed\n");
- rc = -ENODEV;
- goto out_err;
+ if (rc) {
+ dev_err(dev, "TPM self test failed\n");
+ if (rc > 0)
+ rc = -ENODEV;
+ goto out_err;
+ }
+ } else {
+ if (tpm_get_timeouts(chip)) {
+ dev_err(dev, "Could not get TPM timeouts and durations\n");
+ rc = -ENODEV;
+ goto out_err;
+ }
+
+ if (tpm_do_selftest(chip)) {
+ dev_err(dev, "TPM self test failed\n");
+ rc = -ENODEV;
+ goto out_err;
+ }
}
return tpm_chip_register(chip);
@@ -808,14 +865,23 @@ static void tpm_tis_reenable_interrupts(struct tpm_chip *chip)
static int tpm_tis_resume(struct device *dev)
{
struct tpm_chip *chip = dev_get_drvdata(dev);
- int ret;
+ int ret = 0;
if (chip->vendor.irq)
tpm_tis_reenable_interrupts(chip);
- ret = tpm_pm_resume(dev);
- if (!ret)
- tpm_do_selftest(chip);
+ if (chip->flags & TPM_CHIP_FLAG_TPM2) {
+ /* NOP if firmware properly does this. */
+ tpm2_startup(chip, TPM2_SU_STATE);
+
+ ret = tpm2_shutdown(chip, TPM2_SU_STATE);
+ if (!ret)
+ ret = tpm2_do_selftest(chip);
+ } else {
+ ret = tpm_pm_resume(dev);
+ if (!ret)
+ tpm_do_selftest(chip);
+ }
return ret;
}
--
2.1.0
tpm_crb is a driver for TPM 2.0 Command Response Buffer (CRB) Interface
as defined in PC Client Platform TPM Profile (PTP) Specification.
Only polling and single locality is supported as these are the limitations
of the available hardware, Platform Trust Techonlogy (PTT) in Haswell
CPUs.
The driver always applies CRB with ACPI start because PTT reports using
only ACPI start as start method but as a result of my testing it requires
also CRB start.
Signed-off-by: Jarkko Sakkinen <[email protected]>
Reviewed-by: Jasob Gunthorpe <[email protected]>
Reviewed-by: Stephan Berger <[email protected]>
---
drivers/char/tpm/Kconfig | 9 +
drivers/char/tpm/Makefile | 1 +
drivers/char/tpm/tpm-interface.c | 3 +
drivers/char/tpm/tpm_crb.c | 354 +++++++++++++++++++++++++++++++++++++++
4 files changed, 367 insertions(+)
create mode 100644 drivers/char/tpm/tpm_crb.c
diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig
index 3d0873b..9d4e375 100644
--- a/drivers/char/tpm/Kconfig
+++ b/drivers/char/tpm/Kconfig
@@ -122,4 +122,13 @@ config TCG_XEN
To compile this driver as a module, choose M here; the module
will be called xen-tpmfront.
+config TCG_CRB
+ tristate "TPM 2.0 CRB Interface"
+ depends on X86 && ACPI
+ ---help---
+ If you have a TPM security chip that is compliant with the
+ TCG CRB 2.0 TPM specification say Yes and it will be accessible
+ from within Linux. To compile this driver as a module, choose
+ M here; the module will be called tpm_crb.
+
endif # TCG_TPM
diff --git a/drivers/char/tpm/Makefile b/drivers/char/tpm/Makefile
index 88848ed..990cf18 100644
--- a/drivers/char/tpm/Makefile
+++ b/drivers/char/tpm/Makefile
@@ -22,3 +22,4 @@ obj-$(CONFIG_TCG_INFINEON) += tpm_infineon.o
obj-$(CONFIG_TCG_IBMVTPM) += tpm_ibmvtpm.o
obj-$(CONFIG_TCG_TIS_I2C_ST33) += tpm_i2c_stm_st33.o
obj-$(CONFIG_TCG_XEN) += xen-tpmfront.o
+obj-$(CONFIG_TCG_CRB) += tpm_crb.o
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index 20cf94d..bf53a37 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -901,6 +901,9 @@ int tpm_pm_suspend(struct device *dev)
if (chip == NULL)
return -ENODEV;
+ if (chip->flags & TPM_CHIP_FLAG_TPM2)
+ return tpm2_shutdown(chip, TPM2_SU_CLEAR);
+
/* for buggy tpm, flush pcrs with extend to selected dummy */
if (tpm_suspend_pcr) {
cmd.header.in = pcrextend_header;
diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c
new file mode 100644
index 0000000..c248a35
--- /dev/null
+++ b/drivers/char/tpm/tpm_crb.c
@@ -0,0 +1,354 @@
+/*
+ * Copyright (C) 2014 Intel Corporation
+ *
+ * Authors:
+ * Jarkko Sakkinen <[email protected]>
+ *
+ * Maintained by: <[email protected]>
+ *
+ * This device driver implements the TPM interface as defined in
+ * the TCG CRB 2.0 TPM specification.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ */
+
+#include <linux/acpi.h>
+#include <linux/highmem.h>
+#include <linux/rculist.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include "tpm.h"
+
+#define ACPI_SIG_TPM2 "TPM2"
+
+static const u8 CRB_ACPI_START_UUID[] = {
+ /* 0000 */ 0xAB, 0x6C, 0xBF, 0x6B, 0x63, 0x54, 0x14, 0x47,
+ /* 0008 */ 0xB7, 0xCD, 0xF0, 0x20, 0x3C, 0x03, 0x68, 0xD4
+};
+
+enum crb_defaults {
+ CRB_ACPI_START_REVISION_ID = 1,
+ CRB_ACPI_START_INDEX = 1,
+};
+
+enum crb_start_method {
+ CRB_SM_ACPI_START = 2,
+ CRB_SM_CRB = 7,
+ CRB_SM_CRB_WITH_ACPI_START = 8,
+};
+
+struct acpi_tpm2 {
+ struct acpi_table_header hdr;
+ u16 platform_class;
+ u16 reserved;
+ u64 control_area_pa;
+ u32 start_method;
+} __packed;
+
+enum crb_ca_request {
+ CRB_CA_REQ_GO_IDLE = BIT(0),
+ CRB_CA_REQ_CMD_READY = BIT(1),
+};
+
+enum crb_ca_status {
+ CRB_CA_STS_ERROR = BIT(0),
+ CRB_CA_STS_TPM_IDLE = BIT(1),
+};
+
+enum crb_start {
+ CRB_START_INVOKE = BIT(0),
+};
+
+enum crb_cancel {
+ CRB_CANCEL_INVOKE = BIT(0),
+};
+
+struct crb_control_area {
+ u32 req;
+ u32 sts;
+ u32 cancel;
+ u32 start;
+ u32 int_enable;
+ u32 int_sts;
+ u32 cmd_size;
+ u64 cmd_pa;
+ u32 rsp_size;
+ u64 rsp_pa;
+} __packed;
+
+enum crb_status {
+ CRB_STS_COMPLETE = BIT(0),
+};
+
+enum crb_flags {
+ CRB_FL_ACPI_START = BIT(0),
+ CRB_FL_CRB_START = BIT(1),
+};
+
+struct crb_priv {
+ unsigned int flags;
+ struct crb_control_area __iomem *cca;
+ u8 __iomem *cmd;
+ u8 __iomem *rsp;
+};
+
+#ifdef CONFIG_PM_SLEEP
+static int crb_resume(struct device *dev)
+{
+ int rc;
+ struct tpm_chip *chip = dev_get_drvdata(dev);
+
+ rc = tpm2_shutdown(chip, TPM2_SU_STATE);
+ if (!rc)
+ rc = tpm2_do_selftest(chip);
+
+ return rc;
+}
+
+static SIMPLE_DEV_PM_OPS(crb_pm, tpm_pm_suspend, crb_resume);
+#endif
+
+static u8 crb_status(struct tpm_chip *chip)
+{
+ struct crb_priv *priv = chip->vendor.priv;
+ u8 sts = 0;
+
+ if ((le32_to_cpu(ioread32(&priv->cca->start)) & CRB_START_INVOKE) !=
+ CRB_START_INVOKE)
+ sts |= CRB_STS_COMPLETE;
+
+ return sts;
+}
+
+static int crb_recv(struct tpm_chip *chip, u8 *buf, size_t count)
+{
+ struct crb_priv *priv = chip->vendor.priv;
+ unsigned int expected;
+
+ /* sanity check */
+ if (count < 6)
+ return -EIO;
+
+ if (le32_to_cpu(ioread32(&priv->cca->sts)) & CRB_CA_STS_ERROR)
+ return -EIO;
+
+ memcpy_fromio(buf, priv->rsp, 6);
+ expected = be32_to_cpup((__be32 *) &buf[2]);
+
+ if (expected > count)
+ return -EIO;
+
+ memcpy_fromio(&buf[6], &priv->rsp[6], expected - 6);
+
+ return expected;
+}
+
+static int crb_do_acpi_start(struct tpm_chip *chip)
+{
+ union acpi_object *obj;
+ int rc;
+
+ obj = acpi_evaluate_dsm(chip->acpi_dev_handle,
+ CRB_ACPI_START_UUID,
+ CRB_ACPI_START_REVISION_ID,
+ CRB_ACPI_START_INDEX,
+ NULL);
+ if (!obj)
+ return -ENXIO;
+ rc = obj->integer.value == 0 ? 0 : -ENXIO;
+ ACPI_FREE(obj);
+ return rc;
+}
+
+static int crb_send(struct tpm_chip *chip, u8 *buf, size_t len)
+{
+ struct crb_priv *priv = chip->vendor.priv;
+ int rc = 0;
+
+ if (len > le32_to_cpu(ioread32(&priv->cca->cmd_size))) {
+ dev_err(&chip->dev,
+ "invalid command count value %x %zx\n",
+ (unsigned int) len,
+ (size_t) le32_to_cpu(ioread32(&priv->cca->cmd_size)));
+ return -E2BIG;
+ }
+
+ memcpy_toio(priv->cmd, buf, len);
+
+ /* Make sure that cmd is populated before issuing start. */
+ wmb();
+
+ if (priv->flags & CRB_FL_CRB_START)
+ iowrite32(cpu_to_le32(CRB_START_INVOKE), &priv->cca->start);
+
+ if (priv->flags & CRB_FL_ACPI_START)
+ rc = crb_do_acpi_start(chip);
+
+ return rc;
+}
+
+static void crb_cancel(struct tpm_chip *chip)
+{
+ struct crb_priv *priv = chip->vendor.priv;
+
+ iowrite32(cpu_to_le32(CRB_CANCEL_INVOKE), &priv->cca->cancel);
+
+ /* Make sure that cmd is populated before issuing cancel. */
+ wmb();
+
+ if ((priv->flags & CRB_FL_ACPI_START) && crb_do_acpi_start(chip))
+ dev_err(&chip->dev, "ACPI Start failed\n");
+
+ iowrite32(0, &priv->cca->cancel);
+}
+
+static bool crb_req_canceled(struct tpm_chip *chip, u8 status)
+{
+ struct crb_priv *priv = chip->vendor.priv;
+ u32 cancel = le32_to_cpu(ioread32(&priv->cca->cancel));
+
+ return (cancel & CRB_CANCEL_INVOKE) == CRB_CANCEL_INVOKE;
+}
+
+static const struct tpm_class_ops tpm_crb = {
+ .status = crb_status,
+ .recv = crb_recv,
+ .send = crb_send,
+ .cancel = crb_cancel,
+ .req_canceled = crb_req_canceled,
+ .req_complete_mask = CRB_STS_COMPLETE,
+ .req_complete_val = CRB_STS_COMPLETE,
+};
+
+static int crb_acpi_add(struct acpi_device *device)
+{
+ struct tpm_chip *chip;
+ struct acpi_tpm2 *buf;
+ struct crb_priv *priv;
+ struct device *dev = &device->dev;
+ acpi_status status;
+ u32 sm;
+ u64 pa;
+ int rc;
+
+ chip = tpmm_chip_alloc(dev, &tpm_crb);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
+
+ chip->flags = TPM_CHIP_FLAG_TPM2;
+
+ status = acpi_get_table(ACPI_SIG_TPM2, 1,
+ (struct acpi_table_header **) &buf);
+ if (ACPI_FAILURE(status)) {
+ dev_err(dev, "failed to get TPM2 ACPI table\n");
+ return -ENODEV;
+ }
+
+ if (buf->hdr.length < sizeof(struct acpi_tpm2)) {
+ dev_err(dev, "TPM2 ACPI table has wrong size");
+ return -EINVAL;
+ }
+
+ priv = (struct crb_priv *) devm_kzalloc(dev, sizeof(struct crb_priv),
+ GFP_KERNEL);
+ if (!priv) {
+ dev_err(dev, "failed to devm_kzalloc for private data\n");
+ return -ENOMEM;
+ }
+
+ sm = le32_to_cpu(buf->start_method);
+
+ /* The reason for the extra quirk is that the PTT in 4th Gen Core CPUs
+ * report only ACPI start but in practice seems to require both
+ * ACPI start and CRB start.
+ */
+ if (sm == CRB_SM_CRB || sm == CRB_SM_CRB_WITH_ACPI_START ||
+ !strcmp(acpi_device_hid(device), "MSFT0101"))
+ priv->flags |= CRB_FL_CRB_START;
+
+ if (sm == CRB_SM_ACPI_START || sm == CRB_SM_CRB_WITH_ACPI_START)
+ priv->flags |= CRB_FL_ACPI_START;
+
+ priv->cca = (struct crb_control_area __iomem *)
+ devm_ioremap_nocache(dev, buf->control_area_pa, 0x1000);
+ if (!priv->cca) {
+ dev_err(dev, "ioremap of the control area failed\n");
+ return -ENOMEM;
+ }
+
+ memcpy_fromio(&pa, &priv->cca->cmd_pa, 8);
+ pa = le64_to_cpu(pa);
+ priv->cmd = devm_ioremap_nocache(dev, le64_to_cpu(pa),
+ ioread32(&priv->cca->cmd_size));
+ if (!priv->cmd) {
+ dev_err(dev, "ioremap of the command buffer failed\n");
+ return -ENOMEM;
+ }
+
+ memcpy_fromio(&pa, &priv->cca->rsp_pa, 8);
+ pa = le64_to_cpu(pa);
+ priv->rsp = devm_ioremap_nocache(dev, le64_to_cpu(pa),
+ ioread32(&priv->cca->rsp_size));
+ if (!priv->rsp) {
+ dev_err(dev, "ioremap of the response buffer failed\n");
+ return -ENOMEM;
+ }
+
+ chip->vendor.priv = priv;
+
+ /* Default timeouts and durations */
+ chip->vendor.timeout_a = msecs_to_jiffies(TPM2_TIMEOUT_A);
+ chip->vendor.timeout_b = msecs_to_jiffies(TPM2_TIMEOUT_B);
+ chip->vendor.timeout_c = msecs_to_jiffies(TPM2_TIMEOUT_C);
+ chip->vendor.timeout_d = msecs_to_jiffies(TPM2_TIMEOUT_D);
+ chip->vendor.duration[TPM_SHORT] =
+ msecs_to_jiffies(TPM2_DURATION_SHORT);
+ chip->vendor.duration[TPM_MEDIUM] =
+ msecs_to_jiffies(TPM2_DURATION_MEDIUM);
+ chip->vendor.duration[TPM_LONG] =
+ msecs_to_jiffies(TPM2_DURATION_LONG);
+
+ chip->acpi_dev_handle = device->handle;
+
+ rc = tpm2_do_selftest(chip);
+ if (rc)
+ return rc;
+
+ return tpm_chip_register(chip);
+}
+
+static int crb_acpi_remove(struct acpi_device *device)
+{
+ struct device *dev = &device->dev;
+ struct tpm_chip *chip = dev_get_drvdata(dev);
+
+ tpm_chip_unregister(chip);
+ return 0;
+}
+
+static struct acpi_device_id crb_device_ids[] = {
+ {"MSFT0101", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, crb_device_ids);
+
+static struct acpi_driver crb_acpi_driver = {
+ .name = "tpm_crb",
+ .ids = crb_device_ids,
+ .ops = {
+ .add = crb_acpi_add,
+ .remove = crb_acpi_remove,
+ },
+ .drv = {
+ .pm = &crb_pm,
+ },
+};
+
+module_acpi_driver(crb_acpi_driver);
+MODULE_AUTHOR("Jarkko Sakkinen <[email protected]>");
+MODULE_DESCRIPTION("TPM2 Driver");
+MODULE_VERSION("0.1");
+MODULE_LICENSE("GPL");
--
2.1.0
Traversal of the ACPI device tree was not done right. PPI interface
should be looked up only from the ACPI device that is the platform
device for the TPM. This could cause problems with systems with
two TPM chips such as 4th gen Intel systems.
In addition, added the missing license and copyright platter to
the tpm_ppi.c.
Signed-off-by: Jarkko Sakkinen <[email protected]>
Reviewed-by: Jasob Gunthorpe <[email protected]>
Reviewed-by: Stephan Berger <[email protected]>
---
drivers/char/tpm/tpm-chip.c | 4 +-
drivers/char/tpm/tpm.h | 17 ++++--
drivers/char/tpm/tpm_ppi.c | 141 +++++++++++++++++++++++++++-----------------
drivers/char/tpm/tpm_tis.c | 14 +++--
4 files changed, 112 insertions(+), 64 deletions(-)
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
index 7dc9999..64102de 100644
--- a/drivers/char/tpm/tpm-chip.c
+++ b/drivers/char/tpm/tpm-chip.c
@@ -147,7 +147,7 @@ int tpm_chip_register(struct tpm_chip *chip)
if (rc)
goto del_misc;
- rc = tpm_add_ppi(&chip->dev->kobj);
+ rc = tpm_add_ppi(chip);
if (rc)
goto del_sysfs;
@@ -191,7 +191,7 @@ void tpm_chip_unregister(struct tpm_chip *chip)
if (chip->bios_dir)
tpm_bios_log_teardown(chip->bios_dir);
- tpm_remove_ppi(&chip->dev->kobj);
+ tpm_remove_ppi(chip);
tpm_sysfs_del_device(chip);
tpm_dev_del_device(chip);
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 72ff18c..3409acf 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -27,6 +27,7 @@
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/tpm.h>
+#include <linux/acpi.h>
enum tpm_const {
TPM_MINOR = 224, /* officially assigned */
@@ -94,8 +95,11 @@ struct tpm_vendor_specific {
#define TPM_VID_WINBOND 0x1050
#define TPM_VID_STM 0x104A
+#define TPM_PPI_VERSION_LEN 3
+
enum tpm_chip_flags {
TPM_CHIP_FLAG_REGISTERED = BIT(0),
+ TPM_CHIP_FLAG_PPI = BIT(1),
};
struct tpm_chip {
@@ -114,6 +118,11 @@ struct tpm_chip {
struct dentry **bios_dir;
+#ifdef CONFIG_ACPI
+ acpi_handle acpi_dev_handle;
+ char ppi_version[TPM_PPI_VERSION_LEN + 1];
+#endif /* CONFIG_ACPI */
+
struct list_head list;
};
@@ -345,15 +354,15 @@ void tpm_sysfs_del_device(struct tpm_chip *chip);
int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
#ifdef CONFIG_ACPI
-extern int tpm_add_ppi(struct kobject *);
-extern void tpm_remove_ppi(struct kobject *);
+extern int tpm_add_ppi(struct tpm_chip *chip);
+extern void tpm_remove_ppi(struct tpm_chip *chip);
#else
-static inline int tpm_add_ppi(struct kobject *parent)
+static inline int tpm_add_ppi(struct tpm_chip *chip)
{
return 0;
}
-static inline void tpm_remove_ppi(struct kobject *parent)
+static inline void tpm_remove_ppi(struct tpm_chip *chip)
{
}
#endif
diff --git a/drivers/char/tpm/tpm_ppi.c b/drivers/char/tpm/tpm_ppi.c
index 61dcc80..af48c56 100644
--- a/drivers/char/tpm/tpm_ppi.c
+++ b/drivers/char/tpm/tpm_ppi.c
@@ -1,3 +1,22 @@
+/*
+ * Copyright (C) 2012-2014 Intel Corporation
+ *
+ * Authors:
+ * Xiaoyan Zhang <[email protected]>
+ * Jiang Liu <[email protected]>
+ * Jarkko Sakkinen <[email protected]>
+ *
+ * Maintained by: <[email protected]>
+ *
+ * This file contains implementation of the sysfs interface for PPI.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ */
+
+
#include <linux/acpi.h>
#include "tpm.h"
@@ -12,7 +31,6 @@
#define PPI_TPM_REQ_MAX 22
#define PPI_VS_REQ_START 128
#define PPI_VS_REQ_END 255
-#define PPI_VERSION_LEN 3
static const u8 tpm_ppi_uuid[] = {
0xA6, 0xFA, 0xDD, 0x3D,
@@ -22,45 +40,22 @@ static const u8 tpm_ppi_uuid[] = {
0x8D, 0x10, 0x08, 0x9D, 0x16, 0x53
};
-static char tpm_ppi_version[PPI_VERSION_LEN + 1];
-static acpi_handle tpm_ppi_handle;
-
-static acpi_status ppi_callback(acpi_handle handle, u32 level, void *context,
- void **return_value)
-{
- union acpi_object *obj;
-
- if (!acpi_check_dsm(handle, tpm_ppi_uuid, TPM_PPI_REVISION_ID,
- 1 << TPM_PPI_FN_VERSION))
- return AE_OK;
-
- /* Cache version string */
- obj = acpi_evaluate_dsm_typed(handle, tpm_ppi_uuid,
- TPM_PPI_REVISION_ID, TPM_PPI_FN_VERSION,
- NULL, ACPI_TYPE_STRING);
- if (obj) {
- strlcpy(tpm_ppi_version, obj->string.pointer,
- PPI_VERSION_LEN + 1);
- ACPI_FREE(obj);
- }
-
- *return_value = handle;
-
- return AE_CTRL_TERMINATE;
-}
-
static inline union acpi_object *
-tpm_eval_dsm(int func, acpi_object_type type, union acpi_object *argv4)
+tpm_eval_dsm(acpi_handle ppi_handle, int func, acpi_object_type type,
+ union acpi_object *argv4)
{
- BUG_ON(!tpm_ppi_handle);
- return acpi_evaluate_dsm_typed(tpm_ppi_handle, tpm_ppi_uuid,
- TPM_PPI_REVISION_ID, func, argv4, type);
+ BUG_ON(!ppi_handle);
+ return acpi_evaluate_dsm_typed(ppi_handle, tpm_ppi_uuid,
+ TPM_PPI_REVISION_ID,
+ func, argv4, type);
}
static ssize_t tpm_show_ppi_version(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return scnprintf(buf, PAGE_SIZE, "%s\n", tpm_ppi_version);
+ struct tpm_chip *chip = dev_get_drvdata(dev);
+
+ return scnprintf(buf, PAGE_SIZE, "%s\n", chip->ppi_version);
}
static ssize_t tpm_show_ppi_request(struct device *dev,
@@ -68,8 +63,10 @@ static ssize_t tpm_show_ppi_request(struct device *dev,
{
ssize_t size = -EINVAL;
union acpi_object *obj;
+ struct tpm_chip *chip = dev_get_drvdata(dev);
- obj = tpm_eval_dsm(TPM_PPI_FN_GETREQ, ACPI_TYPE_PACKAGE, NULL);
+ obj = tpm_eval_dsm(chip->acpi_dev_handle, TPM_PPI_FN_GETREQ,
+ ACPI_TYPE_PACKAGE, NULL);
if (!obj)
return -ENXIO;
@@ -103,14 +100,15 @@ static ssize_t tpm_store_ppi_request(struct device *dev,
int func = TPM_PPI_FN_SUBREQ;
union acpi_object *obj, tmp;
union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp);
+ struct tpm_chip *chip = dev_get_drvdata(dev);
/*
* the function to submit TPM operation request to pre-os environment
* is updated with function index from SUBREQ to SUBREQ2 since PPI
* version 1.1
*/
- if (acpi_check_dsm(tpm_ppi_handle, tpm_ppi_uuid, TPM_PPI_REVISION_ID,
- 1 << TPM_PPI_FN_SUBREQ2))
+ if (acpi_check_dsm(chip->acpi_dev_handle, tpm_ppi_uuid,
+ TPM_PPI_REVISION_ID, 1 << TPM_PPI_FN_SUBREQ2))
func = TPM_PPI_FN_SUBREQ2;
/*
@@ -119,7 +117,7 @@ static ssize_t tpm_store_ppi_request(struct device *dev,
* string/package type. For PPI version 1.0 and 1.1, use buffer type
* for compatibility, and use package type since 1.2 according to spec.
*/
- if (strcmp(tpm_ppi_version, "1.2") < 0) {
+ if (strcmp(chip->ppi_version, "1.2") < 0) {
if (sscanf(buf, "%d", &req) != 1)
return -EINVAL;
argv4.type = ACPI_TYPE_BUFFER;
@@ -131,7 +129,8 @@ static ssize_t tpm_store_ppi_request(struct device *dev,
return -EINVAL;
}
- obj = tpm_eval_dsm(func, ACPI_TYPE_INTEGER, &argv4);
+ obj = tpm_eval_dsm(chip->acpi_dev_handle, func, ACPI_TYPE_INTEGER,
+ &argv4);
if (!obj) {
return -ENXIO;
} else {
@@ -157,6 +156,7 @@ static ssize_t tpm_show_ppi_transition_action(struct device *dev,
.buffer.length = 0,
.buffer.pointer = NULL
};
+ struct tpm_chip *chip = dev_get_drvdata(dev);
static char *info[] = {
"None",
@@ -171,9 +171,10 @@ static ssize_t tpm_show_ppi_transition_action(struct device *dev,
* (e.g. Capella with PPI 1.0) need integer/string/buffer type, so for
* compatibility, define params[3].type as buffer, if PPI version < 1.2
*/
- if (strcmp(tpm_ppi_version, "1.2") < 0)
+ if (strcmp(chip->ppi_version, "1.2") < 0)
obj = &tmp;
- obj = tpm_eval_dsm(TPM_PPI_FN_GETACT, ACPI_TYPE_INTEGER, obj);
+ obj = tpm_eval_dsm(chip->acpi_dev_handle, TPM_PPI_FN_GETACT,
+ ACPI_TYPE_INTEGER, obj);
if (!obj) {
return -ENXIO;
} else {
@@ -196,8 +197,10 @@ static ssize_t tpm_show_ppi_response(struct device *dev,
acpi_status status = -EINVAL;
union acpi_object *obj, *ret_obj;
u64 req, res;
+ struct tpm_chip *chip = dev_get_drvdata(dev);
- obj = tpm_eval_dsm(TPM_PPI_FN_GETRSP, ACPI_TYPE_PACKAGE, NULL);
+ obj = tpm_eval_dsm(chip->acpi_dev_handle, TPM_PPI_FN_GETRSP,
+ ACPI_TYPE_PACKAGE, NULL);
if (!obj)
return -ENXIO;
@@ -248,7 +251,8 @@ cleanup:
return status;
}
-static ssize_t show_ppi_operations(char *buf, u32 start, u32 end)
+static ssize_t show_ppi_operations(acpi_handle dev_handle, char *buf, u32 start,
+ u32 end)
{
int i;
u32 ret;
@@ -264,14 +268,15 @@ static ssize_t show_ppi_operations(char *buf, u32 start, u32 end)
"User not required",
};
- if (!acpi_check_dsm(tpm_ppi_handle, tpm_ppi_uuid, TPM_PPI_REVISION_ID,
+ if (!acpi_check_dsm(dev_handle, tpm_ppi_uuid, TPM_PPI_REVISION_ID,
1 << TPM_PPI_FN_GETOPR))
return -EPERM;
tmp.integer.type = ACPI_TYPE_INTEGER;
for (i = start; i <= end; i++) {
tmp.integer.value = i;
- obj = tpm_eval_dsm(TPM_PPI_FN_GETOPR, ACPI_TYPE_INTEGER, &argv);
+ obj = tpm_eval_dsm(dev_handle, TPM_PPI_FN_GETOPR,
+ ACPI_TYPE_INTEGER, &argv);
if (!obj) {
return -ENOMEM;
} else {
@@ -291,14 +296,20 @@ static ssize_t tpm_show_ppi_tcg_operations(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- return show_ppi_operations(buf, 0, PPI_TPM_REQ_MAX);
+ struct tpm_chip *chip = dev_get_drvdata(dev);
+
+ return show_ppi_operations(chip->acpi_dev_handle, buf, 0,
+ PPI_TPM_REQ_MAX);
}
static ssize_t tpm_show_ppi_vs_operations(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- return show_ppi_operations(buf, PPI_VS_REQ_START, PPI_VS_REQ_END);
+ struct tpm_chip *chip = dev_get_drvdata(dev);
+
+ return show_ppi_operations(chip->acpi_dev_handle, buf, PPI_VS_REQ_START,
+ PPI_VS_REQ_END);
}
static DEVICE_ATTR(version, S_IRUGO, tpm_show_ppi_version, NULL);
@@ -323,16 +334,38 @@ static struct attribute_group ppi_attr_grp = {
.attrs = ppi_attrs
};
-int tpm_add_ppi(struct kobject *parent)
+int tpm_add_ppi(struct tpm_chip *chip)
{
- /* Cache TPM ACPI handle and version string */
- acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, ACPI_UINT32_MAX,
- ppi_callback, NULL, NULL, &tpm_ppi_handle);
- return tpm_ppi_handle ? sysfs_create_group(parent, &ppi_attr_grp) : 0;
+ union acpi_object *obj;
+ int rc;
+
+ if (!chip->acpi_dev_handle)
+ return 0;
+
+ if (!acpi_check_dsm(chip->acpi_dev_handle, tpm_ppi_uuid,
+ TPM_PPI_REVISION_ID, 1 << TPM_PPI_FN_VERSION))
+ return 0;
+
+ /* Cache PPI version string. */
+ obj = acpi_evaluate_dsm_typed(chip->acpi_dev_handle, tpm_ppi_uuid,
+ TPM_PPI_REVISION_ID, TPM_PPI_FN_VERSION,
+ NULL, ACPI_TYPE_STRING);
+ if (obj) {
+ strlcpy(chip->ppi_version, obj->string.pointer,
+ sizeof(chip->ppi_version));
+ ACPI_FREE(obj);
+ }
+
+ rc = sysfs_create_group(&chip->dev->kobj, &ppi_attr_grp);
+
+ if (!rc)
+ chip->flags |= TPM_CHIP_FLAG_PPI;
+
+ return rc;
}
-void tpm_remove_ppi(struct kobject *parent)
+void tpm_remove_ppi(struct tpm_chip *chip)
{
- if (tpm_ppi_handle)
- sysfs_remove_group(parent, &ppi_attr_grp);
+ if (chip->flags & TPM_CHIP_FLAG_PPI)
+ sysfs_remove_group(&chip->dev->kobj, &ppi_attr_grp);
}
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index 4cf2ea2..e4a3b9c 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -580,8 +580,9 @@ static void tpm_tis_remove(struct tpm_chip *chip)
release_locality(chip, chip->vendor.locality, 1);
}
-static int tpm_tis_init(struct device *dev, resource_size_t start,
- resource_size_t len, unsigned int irq)
+static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
+ resource_size_t start, resource_size_t len,
+ unsigned int irq)
{
u32 vendor, intfcaps, intmask;
int rc, i, irq_s, irq_e, probe;
@@ -597,6 +598,7 @@ static int tpm_tis_init(struct device *dev, resource_size_t start,
return PTR_ERR(chip);
chip->vendor.priv = priv;
+ chip->acpi_dev_handle = acpi_dev_handle;
chip->vendor.iobase = devm_ioremap(dev, start, len);
if (!chip->vendor.iobase)
@@ -827,6 +829,7 @@ static int tpm_tis_pnp_init(struct pnp_dev *pnp_dev,
{
resource_size_t start, len;
unsigned int irq = 0;
+ acpi_handle acpi_dev_handle = NULL;
start = pnp_mem_start(pnp_dev, 0);
len = pnp_mem_len(pnp_dev, 0);
@@ -839,7 +842,10 @@ static int tpm_tis_pnp_init(struct pnp_dev *pnp_dev,
if (is_itpm(pnp_dev))
itpm = true;
- return tpm_tis_init(&pnp_dev->dev, start, len, irq);
+ if (pnp_acpi_device(pnp_dev))
+ acpi_dev_handle = pnp_acpi_device(pnp_dev)->handle;
+
+ return tpm_tis_init(&pnp_dev->dev, acpi_dev_handle, start, len, irq);
}
static struct pnp_device_id tpm_pnp_tbl[] = {
@@ -908,7 +914,7 @@ static int __init init_tis(void)
rc = PTR_ERR(pdev);
goto err_dev;
}
- rc = tpm_tis_init(&pdev->dev, TIS_MEM_BASE, TIS_MEM_LEN, 0);
+ rc = tpm_tis_init(&pdev->dev, NULL, TIS_MEM_BASE, TIS_MEM_LEN, 0);
if (rc)
goto err_init;
return 0;
--
2.1.0
Merged transmit_cmd() functions in tpm-interface.c and tpm-sysfs.c.
Added "tpm_" prefix for consistency sake. Changed cmd parameter as
opaque. This enables to use separate command structures for TPM1
and TPM2 commands in future. Loose coupling works fine here.
Signed-off-by: Jarkko Sakkinen <[email protected]>
Reviewed-by: Jasob Gunthorpe <[email protected]>
Reviewed-by: Stephan Berger <[email protected]>
---
drivers/char/tpm/tpm-interface.c | 49 +++++++++++++++++++++-------------------
drivers/char/tpm/tpm-sysfs.c | 23 ++-----------------
drivers/char/tpm/tpm.h | 3 ++-
3 files changed, 30 insertions(+), 45 deletions(-)
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index cfb9089..c17aa45 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -398,9 +398,10 @@ out:
#define TPM_DIGEST_SIZE 20
#define TPM_RET_CODE_IDX 6
-static ssize_t transmit_cmd(struct tpm_chip *chip, struct tpm_cmd_t *cmd,
- int len, const char *desc)
+ssize_t tpm_transmit_cmd(struct tpm_chip *chip, void *cmd,
+ int len, const char *desc)
{
+ struct tpm_output_header *header;
int err;
len = tpm_transmit(chip, (u8 *) cmd, len);
@@ -409,7 +410,9 @@ static ssize_t transmit_cmd(struct tpm_chip *chip, struct tpm_cmd_t *cmd,
else if (len < TPM_HEADER_SIZE)
return -EFAULT;
- err = be32_to_cpu(cmd->header.out.return_code);
+ header = cmd;
+
+ err = be32_to_cpu(header->return_code);
if (err != 0 && desc)
dev_err(chip->dev, "A TPM error (%d) occurred %s\n", err, desc);
@@ -448,7 +451,7 @@ ssize_t tpm_getcap(struct device *dev, __be32 subcap_id, cap_t *cap,
tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
tpm_cmd.params.getcap_in.subcap = subcap_id;
}
- rc = transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, desc);
+ rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, desc);
if (!rc)
*cap = tpm_cmd.params.getcap_out.cap;
return rc;
@@ -464,8 +467,8 @@ void tpm_gen_interrupt(struct tpm_chip *chip)
tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_TIMEOUT;
- rc = transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
- "attempting to determine the timeouts");
+ rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
+ "attempting to determine the timeouts");
}
EXPORT_SYMBOL_GPL(tpm_gen_interrupt);
@@ -484,8 +487,8 @@ static int tpm_startup(struct tpm_chip *chip, __be16 startup_type)
struct tpm_cmd_t start_cmd;
start_cmd.header.in = tpm_startup_header;
start_cmd.params.startup_in.startup_type = startup_type;
- return transmit_cmd(chip, &start_cmd, TPM_INTERNAL_RESULT_SIZE,
- "attempting to start the TPM");
+ return tpm_transmit_cmd(chip, &start_cmd, TPM_INTERNAL_RESULT_SIZE,
+ "attempting to start the TPM");
}
int tpm_get_timeouts(struct tpm_chip *chip)
@@ -500,7 +503,7 @@ int tpm_get_timeouts(struct tpm_chip *chip)
tpm_cmd.params.getcap_in.cap = TPM_CAP_PROP;
tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_TIMEOUT;
- rc = transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, NULL);
+ rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, NULL);
if (rc == TPM_ERR_INVALID_POSTINIT) {
/* The TPM is not started, we are the first to talk to it.
@@ -513,7 +516,7 @@ int tpm_get_timeouts(struct tpm_chip *chip)
tpm_cmd.params.getcap_in.cap = TPM_CAP_PROP;
tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_TIMEOUT;
- rc = transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
+ rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
NULL);
}
if (rc) {
@@ -575,8 +578,8 @@ duration:
tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_DURATION;
- rc = transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
- "attempting to determine the durations");
+ rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
+ "attempting to determine the durations");
if (rc)
return rc;
@@ -631,8 +634,8 @@ static int tpm_continue_selftest(struct tpm_chip *chip)
struct tpm_cmd_t cmd;
cmd.header.in = continue_selftest_header;
- rc = transmit_cmd(chip, &cmd, CONTINUE_SELFTEST_RESULT_SIZE,
- "continue selftest");
+ rc = tpm_transmit_cmd(chip, &cmd, CONTINUE_SELFTEST_RESULT_SIZE,
+ "continue selftest");
return rc;
}
@@ -672,8 +675,8 @@ int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf)
cmd.header.in = pcrread_header;
cmd.params.pcrread_in.pcr_idx = cpu_to_be32(pcr_idx);
- rc = transmit_cmd(chip, &cmd, READ_PCR_RESULT_SIZE,
- "attempting to read a pcr value");
+ rc = tpm_transmit_cmd(chip, &cmd, READ_PCR_RESULT_SIZE,
+ "attempting to read a pcr value");
if (rc == 0)
memcpy(res_buf, cmd.params.pcrread_out.pcr_result,
@@ -737,8 +740,8 @@ int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash)
cmd.header.in = pcrextend_header;
cmd.params.pcrextend_in.pcr_idx = cpu_to_be32(pcr_idx);
memcpy(cmd.params.pcrextend_in.hash, hash, TPM_DIGEST_SIZE);
- rc = transmit_cmd(chip, &cmd, EXTEND_PCR_RESULT_SIZE,
- "attempting extend a PCR value");
+ rc = tpm_transmit_cmd(chip, &cmd, EXTEND_PCR_RESULT_SIZE,
+ "attempting extend a PCR value");
tpm_chip_put(chip);
return rc;
@@ -817,7 +820,7 @@ int tpm_send(u32 chip_num, void *cmd, size_t buflen)
if (chip == NULL)
return -ENODEV;
- rc = transmit_cmd(chip, cmd, buflen, "attempting tpm_cmd");
+ rc = tpm_transmit_cmd(chip, cmd, buflen, "attempting tpm_cmd");
tpm_chip_put(chip);
return rc;
@@ -938,14 +941,14 @@ int tpm_pm_suspend(struct device *dev)
cmd.params.pcrextend_in.pcr_idx = cpu_to_be32(tpm_suspend_pcr);
memcpy(cmd.params.pcrextend_in.hash, dummy_hash,
TPM_DIGEST_SIZE);
- rc = transmit_cmd(chip, &cmd, EXTEND_PCR_RESULT_SIZE,
- "extending dummy pcr before suspend");
+ rc = tpm_transmit_cmd(chip, &cmd, EXTEND_PCR_RESULT_SIZE,
+ "extending dummy pcr before suspend");
}
/* now do the actual savestate */
for (try = 0; try < TPM_RETRY; try++) {
cmd.header.in = savestate_header;
- rc = transmit_cmd(chip, &cmd, SAVESTATE_RESULT_SIZE, NULL);
+ rc = tpm_transmit_cmd(chip, &cmd, SAVESTATE_RESULT_SIZE, NULL);
/*
* If the TPM indicates that it is too busy to respond to
@@ -1022,7 +1025,7 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max)
tpm_cmd.header.in = tpm_getrandom_header;
tpm_cmd.params.getrandom_in.num_bytes = cpu_to_be32(num_bytes);
- err = transmit_cmd(chip, &tpm_cmd,
+ err = tpm_transmit_cmd(chip, &tpm_cmd,
TPM_GETRANDOM_RESULT_SIZE + num_bytes,
"attempting get random");
if (err)
diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c
index 01730a2..8ecb052 100644
--- a/drivers/char/tpm/tpm-sysfs.c
+++ b/drivers/char/tpm/tpm-sysfs.c
@@ -20,25 +20,6 @@
#include <linux/device.h>
#include "tpm.h"
-/* XXX for now this helper is duplicated in tpm-interface.c */
-static ssize_t transmit_cmd(struct tpm_chip *chip, struct tpm_cmd_t *cmd,
- int len, const char *desc)
-{
- int err;
-
- len = tpm_transmit(chip, (u8 *) cmd, len);
- if (len < 0)
- return len;
- else if (len < TPM_HEADER_SIZE)
- return -EFAULT;
-
- err = be32_to_cpu(cmd->header.out.return_code);
- if (err != 0 && desc)
- dev_err(chip->dev, "A TPM error (%d) occurred %s\n", err, desc);
-
- return err;
-}
-
#define READ_PUBEK_RESULT_SIZE 314
#define TPM_ORD_READPUBEK cpu_to_be32(124)
static struct tpm_input_header tpm_readpubek_header = {
@@ -58,8 +39,8 @@ static ssize_t pubek_show(struct device *dev, struct device_attribute *attr,
struct tpm_chip *chip = dev_get_drvdata(dev);
tpm_cmd.header.in = tpm_readpubek_header;
- err = transmit_cmd(chip, &tpm_cmd, READ_PUBEK_RESULT_SIZE,
- "attempting to read the PUBEK");
+ err = tpm_transmit_cmd(chip, &tpm_cmd, READ_PUBEK_RESULT_SIZE,
+ "attempting to read the PUBEK");
if (err)
goto out;
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index e4d0888..e638eb0 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -314,9 +314,10 @@ struct tpm_cmd_t {
} __packed;
ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *);
-
ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
size_t bufsiz);
+ssize_t tpm_transmit_cmd(struct tpm_chip *chip, void *cmd, int len,
+ const char *desc);
extern int tpm_get_timeouts(struct tpm_chip *);
extern void tpm_gen_interrupt(struct tpm_chip *);
extern int tpm_do_selftest(struct tpm_chip *);
--
2.1.0
TPM 2.0 devices are separated by adding a field 'flags' to struct
tpm_chip and defining a flag TPM_CHIP_FLAG_TPM2 for tagging them.
This patch adds the following internal functions:
- tpm2_get_random()
- tpm2_get_tpm_pt()
- tpm2_pcr_extend()
- tpm2_pcr_read()
- tpm2_startup()
Additionally, the following exported functions are implemented for
implementing TPM 2.0 device drivers:
- tpm2_do_selftest()
- tpm2_calc_ordinal_durations()
- tpm2_gen_interrupt()
The existing functions that are exported for the use for existing
subsystems have been changed to check the flags field in struct
tpm_chip and use appropriate TPM 2.0 counterpart if
TPM_CHIP_FLAG_TPM2 is est.
The code for tpm2_calc_ordinal_duration() and tpm2_startup() were
originally written by Will Arthur.
Signed-off-by: Jarkko Sakkinen <[email protected]>
Signed-off-by: Will Arthur <[email protected]>
Reviewed-by: Jasob Gunthorpe <[email protected]>
Reviewed-by: Stephan Berger <[email protected]>
---
drivers/char/tpm/Makefile | 2 +-
drivers/char/tpm/tpm-chip.c | 27 +-
drivers/char/tpm/tpm-interface.c | 23 +-
drivers/char/tpm/tpm.h | 66 +++++
drivers/char/tpm/tpm2-cmd.c | 617 +++++++++++++++++++++++++++++++++++++++
5 files changed, 721 insertions(+), 14 deletions(-)
create mode 100644 drivers/char/tpm/tpm2-cmd.c
diff --git a/drivers/char/tpm/Makefile b/drivers/char/tpm/Makefile
index c715596..88848ed 100644
--- a/drivers/char/tpm/Makefile
+++ b/drivers/char/tpm/Makefile
@@ -2,7 +2,7 @@
# Makefile for the kernel tpm device drivers.
#
obj-$(CONFIG_TCG_TPM) += tpm.o
-tpm-y := tpm-interface.o tpm-dev.o tpm-sysfs.o tpm-chip.o
+tpm-y := tpm-interface.o tpm-dev.o tpm-sysfs.o tpm-chip.o tpm2-cmd.o
tpm-$(CONFIG_ACPI) += tpm_ppi.o
ifdef CONFIG_ACPI
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
index 7596eef..6459af7 100644
--- a/drivers/char/tpm/tpm-chip.c
+++ b/drivers/char/tpm/tpm-chip.c
@@ -195,15 +195,18 @@ int tpm_chip_register(struct tpm_chip *chip)
if (rc)
return rc;
- rc = tpm_sysfs_add_device(chip);
- if (rc)
- goto del_misc;
+ /* Populate sysfs for TPM1 devices. */
+ if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) {
+ rc = tpm_sysfs_add_device(chip);
+ if (rc)
+ goto del_misc;
- rc = tpm_add_ppi(chip);
- if (rc)
- goto del_sysfs;
+ rc = tpm_add_ppi(chip);
+ if (rc)
+ goto del_sysfs;
- chip->bios_dir = tpm_bios_log_setup(chip->devname);
+ chip->bios_dir = tpm_bios_log_setup(chip->devname);
+ }
/* Make the chip available. */
spin_lock(&driver_lock);
@@ -241,10 +244,12 @@ void tpm_chip_unregister(struct tpm_chip *chip)
spin_unlock(&driver_lock);
synchronize_rcu();
- if (chip->bios_dir)
- tpm_bios_log_teardown(chip->bios_dir);
- tpm_remove_ppi(chip);
- tpm_sysfs_del_device(chip);
+ if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) {
+ if (chip->bios_dir)
+ tpm_bios_log_teardown(chip->bios_dir);
+ tpm_remove_ppi(chip);
+ tpm_sysfs_del_device(chip);
+ }
tpm_dev_del_device(chip);
}
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index b6f6b17..20cf94d 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -360,7 +360,10 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
if (chip->vendor.irq)
goto out_recv;
- stop = jiffies + tpm_calc_ordinal_duration(chip, ordinal);
+ if (chip->flags & TPM_CHIP_FLAG_TPM2)
+ stop = jiffies + tpm2_calc_ordinal_duration(chip, ordinal);
+ else
+ stop = jiffies + tpm_calc_ordinal_duration(chip, ordinal);
do {
u8 status = chip->ops->status(chip);
if ((status & chip->ops->req_complete_mask) ==
@@ -484,6 +487,7 @@ static int tpm_startup(struct tpm_chip *chip, __be16 startup_type)
{
struct tpm_cmd_t start_cmd;
start_cmd.header.in = tpm_startup_header;
+
start_cmd.params.startup_in.startup_type = startup_type;
return tpm_transmit_cmd(chip, &start_cmd, TPM_INTERNAL_RESULT_SIZE,
"attempting to start the TPM");
@@ -680,7 +684,10 @@ int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf)
chip = tpm_chip_find_get(chip_num);
if (chip == NULL)
return -ENODEV;
- rc = tpm_pcr_read_dev(chip, pcr_idx, res_buf);
+ if (chip->flags & TPM_CHIP_FLAG_TPM2)
+ rc = tpm2_pcr_read(chip, pcr_idx, res_buf);
+ else
+ rc = tpm_pcr_read_dev(chip, pcr_idx, res_buf);
tpm_chip_put(chip);
return rc;
}
@@ -714,6 +721,12 @@ int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash)
if (chip == NULL)
return -ENODEV;
+ if (chip->flags & TPM_CHIP_FLAG_TPM2) {
+ rc = tpm2_pcr_extend(chip, pcr_idx, hash);
+ tpm_chip_put(chip);
+ return rc;
+ }
+
cmd.header.in = pcrextend_header;
cmd.params.pcrextend_in.pcr_idx = cpu_to_be32(pcr_idx);
memcpy(cmd.params.pcrextend_in.hash, hash, TPM_DIGEST_SIZE);
@@ -974,6 +987,12 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max)
if (chip == NULL)
return -ENODEV;
+ if (chip->flags & TPM_CHIP_FLAG_TPM2) {
+ err = tpm2_get_random(chip, out, max);
+ tpm_chip_put(chip);
+ return err;
+ }
+
do {
tpm_cmd.header.in = tpm_getrandom_header;
tpm_cmd.params.getrandom_in.num_bytes = cpu_to_be32(num_bytes);
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index d46765b..cc421cf 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -62,6 +62,59 @@ enum tpm_duration {
#define TPM_ERR_INVALID_POSTINIT 38
#define TPM_HEADER_SIZE 10
+
+enum tpm2_const {
+ TPM2_PLATFORM_PCR = 24,
+ TPM2_PCR_SELECT_MIN = ((TPM2_PLATFORM_PCR + 7) / 8),
+ TPM2_TIMEOUT_A = 750,
+ TPM2_TIMEOUT_B = 2000,
+ TPM2_TIMEOUT_C = 200,
+ TPM2_TIMEOUT_D = 30,
+ TPM2_DURATION_SHORT = 20,
+ TPM2_DURATION_MEDIUM = 750,
+ TPM2_DURATION_LONG = 2000,
+};
+
+enum tpm2_structures {
+ TPM2_ST_NO_SESSIONS = 0x8001,
+ TPM2_ST_SESSIONS = 0x8002,
+};
+
+enum tpm2_return_codes {
+ TPM2_RC_INITIALIZE = 0x0100,
+ TPM2_RC_TESTING = 0x090A,
+ TPM2_RC_DISABLED = 0x0120,
+};
+
+enum tpm2_algorithms {
+ TPM2_ALG_SHA1 = 0x0004,
+};
+
+enum tpm2_command_codes {
+ TPM2_CC_FIRST = 0x011F,
+ TPM2_CC_SELF_TEST = 0x0143,
+ TPM2_CC_STARTUP = 0x0144,
+ TPM2_CC_SHUTDOWN = 0x0145,
+ TPM2_CC_GET_CAPABILITY = 0x017A,
+ TPM2_CC_GET_RANDOM = 0x017B,
+ TPM2_CC_PCR_READ = 0x017E,
+ TPM2_CC_PCR_EXTEND = 0x0182,
+ TPM2_CC_LAST = 0x018F,
+};
+
+enum tpm2_permanent_handles {
+ TPM2_RS_PW = 0x40000009,
+};
+
+enum tpm2_capabilities {
+ TPM2_CAP_TPM_PROPERTIES = 6,
+};
+
+enum tpm2_startup_types {
+ TPM2_SU_CLEAR = 0x0000,
+ TPM2_SU_STATE = 0x0001,
+};
+
struct tpm_chip;
struct tpm_vendor_specific {
@@ -99,6 +152,7 @@ struct tpm_vendor_specific {
enum tpm_chip_flags {
TPM_CHIP_FLAG_REGISTERED = BIT(0),
TPM_CHIP_FLAG_PPI = BIT(1),
+ TPM_CHIP_FLAG_TPM2 = BIT(2),
};
struct tpm_chip {
@@ -370,3 +424,15 @@ static inline void tpm_remove_ppi(struct tpm_chip *chip)
{
}
#endif
+
+int tpm2_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
+int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash);
+int tpm2_get_random(struct tpm_chip *chip, u8 *out, size_t max);
+ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id,
+ u32 *value, const char *desc);
+
+extern int tpm2_startup(struct tpm_chip *chip, u16 startup_type);
+extern int tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type);
+extern unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *, u32);
+extern int tpm2_do_selftest(struct tpm_chip *chip);
+extern int tpm2_gen_interrupt(struct tpm_chip *chip, bool quiet);
diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
new file mode 100644
index 0000000..610dc87
--- /dev/null
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -0,0 +1,617 @@
+/*
+ * Copyright (C) 2014 Intel Corporation
+ *
+ * Authors:
+ * Jarkko Sakkinen <[email protected]>
+ *
+ * Maintained by: <[email protected]>
+ *
+ * This file contains TPM2 protocol implementations of the commands
+ * used by the kernel internally.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ */
+
+#include "tpm.h"
+
+struct tpm2_startup_in {
+ __be16 startup_type;
+} __packed;
+
+struct tpm2_self_test_in {
+ u8 full_test;
+} __packed;
+
+struct tpm2_pcr_read_in {
+ __be32 pcr_selects_cnt;
+ __be16 hash_alg;
+ u8 pcr_select_size;
+ u8 pcr_select[TPM2_PCR_SELECT_MIN];
+} __packed;
+
+struct tpm2_pcr_read_out {
+ __be32 update_cnt;
+ __be32 pcr_selects_cnt;
+ __be16 hash_alg;
+ u8 pcr_select_size;
+ u8 pcr_select[TPM2_PCR_SELECT_MIN];
+ __be32 digests_cnt;
+ __be16 digest_size;
+ u8 digest[TPM_DIGEST_SIZE];
+} __packed;
+
+struct tpm2_null_auth_area {
+ __be32 handle;
+ __be16 nonce_size;
+ u8 attributes;
+ __be16 auth_size;
+} __packed;
+
+struct tpm2_pcr_extend_in {
+ __be32 pcr_idx;
+ __be32 auth_area_size;
+ struct tpm2_null_auth_area auth_area;
+ __be32 digest_cnt;
+ __be16 hash_alg;
+ u8 digest[TPM_DIGEST_SIZE];
+} __packed;
+
+struct tpm2_get_tpm_pt_in {
+ __be32 cap_id;
+ __be32 property_id;
+ __be32 property_cnt;
+} __packed;
+
+struct tpm2_get_tpm_pt_out {
+ u8 more_data;
+ __be32 subcap_id;
+ __be32 property_cnt;
+ __be32 property_id;
+ __be32 value;
+} __packed;
+
+struct tpm2_get_random_in {
+ __be16 size;
+} __packed;
+
+struct tpm2_get_random_out {
+ __be16 size;
+ u8 buffer[TPM_MAX_RNG_DATA];
+} __packed;
+
+union tpm2_cmd_params {
+ struct tpm2_startup_in startup_in;
+ struct tpm2_self_test_in selftest_in;
+ struct tpm2_pcr_read_in pcrread_in;
+ struct tpm2_pcr_read_out pcrread_out;
+ struct tpm2_pcr_extend_in pcrextend_in;
+ struct tpm2_get_tpm_pt_in get_tpm_pt_in;
+ struct tpm2_get_tpm_pt_out get_tpm_pt_out;
+ struct tpm2_get_random_in getrandom_in;
+ struct tpm2_get_random_out getrandom_out;
+};
+
+struct tpm2_cmd {
+ tpm_cmd_header header;
+ union tpm2_cmd_params params;
+} __packed;
+
+/*
+ * Array with one entry per ordinal defining the maximum amount
+ * of time the chip could take to return the result. The values
+ * of the SHORT, MEDIUM, and LONG durations are taken from the
+ * PC Client Profile (PTP) specification.
+ */
+static const u8 tpm2_ordinal_duration[TPM2_CC_LAST - TPM2_CC_FIRST + 1] = {
+ TPM_UNDEFINED, /* 11F */
+ TPM_UNDEFINED, /* 120 */
+ TPM_LONG, /* 121 */
+ TPM_UNDEFINED, /* 122 */
+ TPM_UNDEFINED, /* 123 */
+ TPM_UNDEFINED, /* 124 */
+ TPM_UNDEFINED, /* 125 */
+ TPM_UNDEFINED, /* 126 */
+ TPM_UNDEFINED, /* 127 */
+ TPM_UNDEFINED, /* 128 */
+ TPM_LONG, /* 129 */
+ TPM_UNDEFINED, /* 12a */
+ TPM_UNDEFINED, /* 12b */
+ TPM_UNDEFINED, /* 12c */
+ TPM_UNDEFINED, /* 12d */
+ TPM_UNDEFINED, /* 12e */
+ TPM_UNDEFINED, /* 12f */
+ TPM_UNDEFINED, /* 130 */
+ TPM_UNDEFINED, /* 131 */
+ TPM_UNDEFINED, /* 132 */
+ TPM_UNDEFINED, /* 133 */
+ TPM_UNDEFINED, /* 134 */
+ TPM_UNDEFINED, /* 135 */
+ TPM_UNDEFINED, /* 136 */
+ TPM_UNDEFINED, /* 137 */
+ TPM_UNDEFINED, /* 138 */
+ TPM_UNDEFINED, /* 139 */
+ TPM_UNDEFINED, /* 13a */
+ TPM_UNDEFINED, /* 13b */
+ TPM_UNDEFINED, /* 13c */
+ TPM_UNDEFINED, /* 13d */
+ TPM_MEDIUM, /* 13e */
+ TPM_UNDEFINED, /* 13f */
+ TPM_UNDEFINED, /* 140 */
+ TPM_UNDEFINED, /* 141 */
+ TPM_UNDEFINED, /* 142 */
+ TPM_LONG, /* 143 */
+ TPM_MEDIUM, /* 144 */
+ TPM_UNDEFINED, /* 145 */
+ TPM_UNDEFINED, /* 146 */
+ TPM_UNDEFINED, /* 147 */
+ TPM_UNDEFINED, /* 148 */
+ TPM_UNDEFINED, /* 149 */
+ TPM_UNDEFINED, /* 14a */
+ TPM_UNDEFINED, /* 14b */
+ TPM_UNDEFINED, /* 14c */
+ TPM_UNDEFINED, /* 14d */
+ TPM_LONG, /* 14e */
+ TPM_UNDEFINED, /* 14f */
+ TPM_UNDEFINED, /* 150 */
+ TPM_UNDEFINED, /* 151 */
+ TPM_UNDEFINED, /* 152 */
+ TPM_UNDEFINED, /* 153 */
+ TPM_UNDEFINED, /* 154 */
+ TPM_UNDEFINED, /* 155 */
+ TPM_UNDEFINED, /* 156 */
+ TPM_UNDEFINED, /* 157 */
+ TPM_UNDEFINED, /* 158 */
+ TPM_UNDEFINED, /* 159 */
+ TPM_UNDEFINED, /* 15a */
+ TPM_UNDEFINED, /* 15b */
+ TPM_MEDIUM, /* 15c */
+ TPM_UNDEFINED, /* 15d */
+ TPM_UNDEFINED, /* 15e */
+ TPM_UNDEFINED, /* 15f */
+ TPM_UNDEFINED, /* 160 */
+ TPM_UNDEFINED, /* 161 */
+ TPM_UNDEFINED, /* 162 */
+ TPM_UNDEFINED, /* 163 */
+ TPM_UNDEFINED, /* 164 */
+ TPM_UNDEFINED, /* 165 */
+ TPM_UNDEFINED, /* 166 */
+ TPM_UNDEFINED, /* 167 */
+ TPM_UNDEFINED, /* 168 */
+ TPM_UNDEFINED, /* 169 */
+ TPM_UNDEFINED, /* 16a */
+ TPM_UNDEFINED, /* 16b */
+ TPM_UNDEFINED, /* 16c */
+ TPM_UNDEFINED, /* 16d */
+ TPM_UNDEFINED, /* 16e */
+ TPM_UNDEFINED, /* 16f */
+ TPM_UNDEFINED, /* 170 */
+ TPM_UNDEFINED, /* 171 */
+ TPM_UNDEFINED, /* 172 */
+ TPM_UNDEFINED, /* 173 */
+ TPM_UNDEFINED, /* 174 */
+ TPM_UNDEFINED, /* 175 */
+ TPM_UNDEFINED, /* 176 */
+ TPM_LONG, /* 177 */
+ TPM_UNDEFINED, /* 178 */
+ TPM_UNDEFINED, /* 179 */
+ TPM_MEDIUM, /* 17a */
+ TPM_LONG, /* 17b */
+ TPM_UNDEFINED, /* 17c */
+ TPM_UNDEFINED, /* 17d */
+ TPM_UNDEFINED, /* 17e */
+ TPM_UNDEFINED, /* 17f */
+ TPM_UNDEFINED, /* 180 */
+ TPM_UNDEFINED, /* 181 */
+ TPM_MEDIUM, /* 182 */
+ TPM_UNDEFINED, /* 183 */
+ TPM_UNDEFINED, /* 184 */
+ TPM_MEDIUM, /* 185 */
+ TPM_MEDIUM, /* 186 */
+ TPM_UNDEFINED, /* 187 */
+ TPM_UNDEFINED, /* 188 */
+ TPM_UNDEFINED, /* 189 */
+ TPM_UNDEFINED, /* 18a */
+ TPM_UNDEFINED, /* 18b */
+ TPM_UNDEFINED, /* 18c */
+ TPM_UNDEFINED, /* 18d */
+ TPM_UNDEFINED, /* 18e */
+ TPM_UNDEFINED /* 18f */
+};
+
+#define TPM2_PCR_READ_IN_SIZE \
+ (sizeof(struct tpm_input_header) + \
+ sizeof(struct tpm2_pcr_read_in))
+
+static const struct tpm_input_header tpm2_pcrread_header = {
+ .tag = cpu_to_be16(TPM2_ST_NO_SESSIONS),
+ .length = cpu_to_be32(TPM2_PCR_READ_IN_SIZE),
+ .ordinal = cpu_to_be32(TPM2_CC_PCR_READ)
+};
+
+/**
+ * tpm2_pcr_read() - read a PCR value
+ * @chip: TPM chip to use.
+ * @pcr_idx: index of the PCR to read.
+ * @ref_buf: buffer to store the resulting hash,
+ *
+ * 0 is returned when the operation is successful. If a negative number is
+ * returned it remarks a POSIX error code. If a positive number is returned
+ * it remarks a TPM error.
+ */
+int tpm2_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf)
+{
+ int rc;
+ struct tpm2_cmd cmd;
+ u8 *buf;
+
+ if (pcr_idx >= TPM2_PLATFORM_PCR)
+ return -EINVAL;
+
+ cmd.header.in = tpm2_pcrread_header;
+ cmd.params.pcrread_in.pcr_selects_cnt = cpu_to_be32(1);
+ cmd.params.pcrread_in.hash_alg = cpu_to_be16(TPM2_ALG_SHA1);
+ cmd.params.pcrread_in.pcr_select_size = TPM2_PCR_SELECT_MIN;
+
+ memset(cmd.params.pcrread_in.pcr_select, 0,
+ sizeof(cmd.params.pcrread_in.pcr_select));
+ cmd.params.pcrread_in.pcr_select[pcr_idx >> 3] = 1 << (pcr_idx & 0x7);
+
+ rc = tpm_transmit_cmd(chip, &cmd, sizeof(cmd),
+ "attempting to read a pcr value");
+ if (rc == 0) {
+ buf = cmd.params.pcrread_out.digest;
+ memcpy(res_buf, buf, TPM_DIGEST_SIZE);
+ }
+
+ return rc;
+}
+
+#define TPM2_GET_PCREXTEND_IN_SIZE \
+ (sizeof(struct tpm_input_header) + \
+ sizeof(struct tpm2_pcr_extend_in))
+
+static const struct tpm_input_header tpm2_pcrextend_header = {
+ .tag = cpu_to_be16(TPM2_ST_SESSIONS),
+ .length = cpu_to_be32(TPM2_GET_PCREXTEND_IN_SIZE),
+ .ordinal = cpu_to_be32(TPM2_CC_PCR_EXTEND)
+};
+
+/**
+ * tpm2_pcr_extend() - extend a PCR value
+ * @chip: TPM chip to use.
+ * @pcr_idx: index of the PCR.
+ * @hash: hash value to use for the extend operation.
+ *
+ * 0 is returned when the operation is successful. If a negative number is
+ * returned it remarks a POSIX error code. If a positive number is returned
+ * it remarks a TPM error.
+ */
+int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash)
+{
+ struct tpm2_cmd cmd;
+ int rc;
+
+ cmd.header.in = tpm2_pcrextend_header;
+ cmd.params.pcrextend_in.pcr_idx = cpu_to_be32(pcr_idx);
+ cmd.params.pcrextend_in.auth_area_size =
+ cpu_to_be32(sizeof(struct tpm2_null_auth_area));
+ cmd.params.pcrextend_in.auth_area.handle =
+ cpu_to_be32(TPM2_RS_PW);
+ cmd.params.pcrextend_in.auth_area.nonce_size = 0;
+ cmd.params.pcrextend_in.auth_area.attributes = 0;
+ cmd.params.pcrextend_in.auth_area.auth_size = 0;
+ cmd.params.pcrextend_in.digest_cnt = cpu_to_be32(1);
+ cmd.params.pcrextend_in.hash_alg = cpu_to_be16(TPM2_ALG_SHA1);
+ memcpy(cmd.params.pcrextend_in.digest, hash, TPM_DIGEST_SIZE);
+
+ rc = tpm_transmit_cmd(chip, &cmd, sizeof(cmd),
+ "attempting extend a PCR value");
+
+ return rc;
+}
+
+#define TPM2_GETRANDOM_IN_SIZE \
+ (sizeof(struct tpm_input_header) + \
+ sizeof(struct tpm2_get_random_in))
+
+static const struct tpm_input_header tpm2_getrandom_header = {
+ .tag = cpu_to_be16(TPM2_ST_NO_SESSIONS),
+ .length = cpu_to_be32(TPM2_GETRANDOM_IN_SIZE),
+ .ordinal = cpu_to_be32(TPM2_CC_GET_RANDOM)
+};
+
+/**
+ * tpm2_get_random() - get random bytes from the TPM RNG
+ * @chip: TPM chip to use
+ * @out: destination buffer for the random bytes
+ * @max: the max number of bytes to write to @out
+ *
+ * 0 is returned when the operation is successful. If a negative number is
+ * returned it remarks a POSIX error code. If a positive number is returned
+ * it remarks a TPM error.
+ */
+int tpm2_get_random(struct tpm_chip *chip, u8 *out, size_t max)
+{
+ struct tpm2_cmd cmd;
+ u32 recd;
+ u32 num_bytes;
+ int err;
+ int total = 0;
+ int retries = 5;
+ u8 *dest = out;
+
+ num_bytes = min_t(u32, max, sizeof(cmd.params.getrandom_out.buffer));
+
+ if (!out || !num_bytes ||
+ max > sizeof(cmd.params.getrandom_out.buffer))
+ return -EINVAL;
+
+ do {
+ cmd.header.in = tpm2_getrandom_header;
+ cmd.params.getrandom_in.size = cpu_to_be16(num_bytes);
+
+ err = tpm_transmit_cmd(chip, &cmd, sizeof(cmd),
+ "attempting get random");
+ if (err)
+ break;
+
+ recd = min_t(u32, be16_to_cpu(cmd.params.getrandom_out.size),
+ num_bytes);
+ memcpy(dest, cmd.params.getrandom_out.buffer, recd);
+
+ dest += recd;
+ total += recd;
+ num_bytes -= recd;
+ } while (retries-- && total < max);
+
+ return total ? total : -EIO;
+}
+
+#define TPM2_GET_TPM_PT_IN_SIZE \
+ (sizeof(struct tpm_input_header) + \
+ sizeof(struct tpm2_get_tpm_pt_in))
+
+static const struct tpm_input_header tpm2_get_tpm_pt_header = {
+ .tag = cpu_to_be16(TPM2_ST_NO_SESSIONS),
+ .length = cpu_to_be32(TPM2_GET_TPM_PT_IN_SIZE),
+ .ordinal = cpu_to_be32(TPM2_CC_GET_CAPABILITY)
+};
+
+/**
+ * tpm2_get_tpm_pt() - get value of a TPM_CAP_TPM_PROPERTIES type property
+ * @chip: TPM chip to use.
+ * @property_id: property ID.
+ * @value: output variable.
+ * @desc: passed to tpm_transmit_cmd()
+ *
+ * 0 is returned when the operation is successful. If a negative number is
+ * returned it remarks a POSIX error code. If a positive number is returned
+ * it remarks a TPM error.
+ */
+ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id, u32 *value,
+ const char *desc)
+{
+ struct tpm2_cmd cmd;
+ int rc;
+
+ cmd.header.in = tpm2_get_tpm_pt_header;
+ cmd.params.get_tpm_pt_in.cap_id = cpu_to_be32(TPM2_CAP_TPM_PROPERTIES);
+ cmd.params.get_tpm_pt_in.property_id = cpu_to_be32(property_id);
+ cmd.params.get_tpm_pt_in.property_cnt = cpu_to_be32(1);
+
+ rc = tpm_transmit_cmd(chip, &cmd, sizeof(cmd), desc);
+ if (!rc)
+ *value = cmd.params.get_tpm_pt_out.value;
+
+ return rc;
+}
+
+#define TPM2_STARTUP_IN_SIZE \
+ (sizeof(struct tpm_input_header) + \
+ sizeof(struct tpm2_pcr_read_in))
+
+static const struct tpm_input_header tpm2_startup_header = {
+ .tag = cpu_to_be16(TPM2_ST_NO_SESSIONS),
+ .length = cpu_to_be32(TPM2_STARTUP_IN_SIZE),
+ .ordinal = cpu_to_be32(TPM2_CC_STARTUP)
+};
+
+/**
+ * tpm2_startup() - send startup command to the TPM chip
+ * @chip: TPM chip to use.
+ * @startup_type startup type. The value is either
+ * TPM_SU_CLEAR or TPM_SU_STATE.
+ *
+ * 0 is returned when the operation is successful. If a negative number is
+ * returned it remarks a POSIX error code. If a positive number is returned
+ * it remarks a TPM error.
+ */
+int tpm2_startup(struct tpm_chip *chip, u16 startup_type)
+{
+ struct tpm2_cmd cmd;
+
+ cmd.header.in = tpm2_startup_header;
+
+ cmd.params.startup_in.startup_type = cpu_to_be16(startup_type);
+ return tpm_transmit_cmd(chip, &cmd, sizeof(cmd),
+ "attempting to start the TPM");
+}
+EXPORT_SYMBOL_GPL(tpm2_startup);
+
+#define TPM2_SHUTDOWN_IN_SIZE \
+ (sizeof(struct tpm_input_header) + \
+ sizeof(struct tpm2_startup_in))
+
+static const struct tpm_input_header tpm2_shutdown_header = {
+ .tag = cpu_to_be16(TPM2_ST_NO_SESSIONS),
+ .length = cpu_to_be32(TPM2_SHUTDOWN_IN_SIZE),
+ .ordinal = cpu_to_be32(TPM2_CC_SHUTDOWN)
+};
+
+/**
+ * tpm2_shutdown() - send shutdown command to the TPM chip
+ * @chip: TPM chip to use.
+ * @shutdown_type shutdown type. The value is either
+ * TPM_SU_CLEAR or TPM_SU_STATE.
+ *
+ * 0 is returned when the operation is successful. If a negative number is
+ * returned it remarks a POSIX error code. If a positive number is returned
+ * it remarks a TPM error.
+ */
+int tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type)
+{
+ struct tpm2_cmd cmd;
+
+ cmd.header.in = tpm2_shutdown_header;
+
+ cmd.params.startup_in.startup_type = cpu_to_be16(shutdown_type);
+ return tpm_transmit_cmd(chip, &cmd, sizeof(cmd),
+ "attempting to start the TPM");
+}
+EXPORT_SYMBOL_GPL(tpm2_shutdown);
+
+/*
+ * tpm2_calc_ordinal_duration() - maximum duration for a command
+ * @chip: TPM chip to use.
+ * @ordinal: command code number.
+ *
+ * 0 is returned when the operation is successful. If a negative number is
+ * returned it remarks a POSIX error code. If a positive number is returned
+ * it remarks a TPM error.
+ */
+unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal)
+{
+ int index = TPM_UNDEFINED;
+ int duration = 0;
+
+ if (ordinal >= TPM2_CC_FIRST && ordinal <= TPM2_CC_LAST)
+ index = tpm2_ordinal_duration[ordinal - TPM2_CC_FIRST];
+
+ if (index != TPM_UNDEFINED)
+ duration = chip->vendor.duration[index];
+
+ if (duration <= 0)
+ duration = 2 * 60 * HZ;
+
+ return duration;
+}
+EXPORT_SYMBOL_GPL(tpm2_calc_ordinal_duration);
+
+#define TPM2_SELF_TEST_IN_SIZE \
+ (sizeof(struct tpm_input_header) + \
+ sizeof(struct tpm2_self_test_in))
+
+static const struct tpm_input_header tpm2_selftest_header = {
+ .tag = cpu_to_be16(TPM2_ST_NO_SESSIONS),
+ .length = cpu_to_be32(TPM2_SELF_TEST_IN_SIZE),
+ .ordinal = cpu_to_be32(TPM2_CC_SELF_TEST)
+};
+
+/**
+ * tpm2_continue_selftest() - start a self test
+ * @chip: TPM chip to use
+ * @full: test all commands instead of testing only those that were not
+ * previously tested.
+ *
+ * 0 is returned when the operation is successful. If a negative number is
+ * returned it remarks a POSIX error code. If a positive number is returned
+ * it remarks a TPM error.
+ */
+static int tpm2_start_selftest(struct tpm_chip *chip, bool full)
+{
+ int rc;
+ struct tpm2_cmd cmd;
+
+ cmd.header.in = tpm2_selftest_header;
+ cmd.params.selftest_in.full_test = full;
+
+ rc = tpm_transmit_cmd(chip, &cmd, TPM2_SELF_TEST_IN_SIZE,
+ "continue selftest");
+
+ /* At least some prototype chips seem to give RC_TESTING error
+ * immediately. This is a workaround for that.
+ */
+ if (rc == TPM2_RC_TESTING) {
+ dev_warn(chip->pdev, "Got RC_TESTING, ignoring\n");
+ rc = 0;
+ }
+
+ return rc;
+}
+
+/**
+ * tpm2_do_selftest() - run a full self test
+ * @chip: TPM chip to use
+ *
+ * During the self test TPM2 commands return with the error code RC_TESTING.
+ * Waiting is done by issuing PCR read until it executes successfully.
+ *
+ * 0 is returned when the operation is successful. If a negative number is
+ * returned it remarks a POSIX error code. If a positive number is returned
+ * it remarks a TPM error.
+ */
+int tpm2_do_selftest(struct tpm_chip *chip)
+{
+ int rc;
+ unsigned int loops;
+ unsigned int delay_msec = 100;
+ unsigned long duration;
+ struct tpm2_cmd cmd;
+ int i;
+
+ duration = tpm2_calc_ordinal_duration(chip, TPM2_CC_SELF_TEST);
+
+ loops = jiffies_to_msecs(duration) / delay_msec;
+
+ rc = tpm2_start_selftest(chip, true);
+ if (rc)
+ return rc;
+
+ for (i = 0; i < loops; i++) {
+ /* Attempt to read a PCR value */
+ cmd.header.in = tpm2_pcrread_header;
+ cmd.params.pcrread_in.pcr_selects_cnt = cpu_to_be32(1);
+ cmd.params.pcrread_in.hash_alg = cpu_to_be16(TPM2_ALG_SHA1);
+ cmd.params.pcrread_in.pcr_select_size = TPM2_PCR_SELECT_MIN;
+ cmd.params.pcrread_in.pcr_select[0] = 0x01;
+ cmd.params.pcrread_in.pcr_select[1] = 0x00;
+ cmd.params.pcrread_in.pcr_select[2] = 0x00;
+
+ rc = tpm_transmit_cmd(chip, (u8 *) &cmd, sizeof(cmd), NULL);
+ if (rc < 0)
+ break;
+
+ rc = be32_to_cpu(cmd.header.out.return_code);
+ if (rc != TPM2_RC_TESTING)
+ break;
+
+ msleep(delay_msec);
+ }
+
+ return rc;
+}
+EXPORT_SYMBOL_GPL(tpm2_do_selftest);
+
+/**
+ * tpm2_gen_interrupt() - generate an interrupt
+ * @chip: TPM chip to use
+ * @quiet: surpress the error message
+ *
+ * 0 is returned when the operation is successful. If a negative number is
+ * returned it remarks a POSIX error code. If a positive number is returned
+ * it remarks a TPM error.
+ */
+int tpm2_gen_interrupt(struct tpm_chip *chip, bool quiet)
+{
+ const char *desc = NULL;
+ u32 dummy;
+
+ if (!quiet)
+ desc = "attempting to generate an interrupt";
+
+ return tpm2_get_tpm_pt(chip, TPM2_CAP_TPM_PROPERTIES, &dummy, desc);
+}
+EXPORT_SYMBOL_GPL(tpm2_gen_interrupt);
--
2.1.0
Added own device class for TPM. Uses MISC_MAJOR:TPM_MINOR for the
first character device in order to retain backwards compatibility.
Added tpm_dev_release() back attached to the character device.
I've been running this code now for a while on my laptop (Lenovo
T430S) TrouSerS works perfectly without modifications. I don't
believe it breaks anything significantly.
The sysfs attributes that have been placed under the wrong place
and are against sysfs-rules.txt should be probably left to
stagnate under platform device directory and start defining
new sysfs attributes to the char device directory.
Guidelines for future TPM sysfs attributes should be probably
along the lines of
- Single flat set of mandatory sysfs attributes. For example,
current PPI interface is way way too rich when you only want
to use it to clear and activate the TPM.
- Define sysfs attribute if and only if there's no way to get
the value from ring-3. No attributes for TPM properties. It's
just unnecessary maintenance hurdle that we don't want.
Signed-off-by: Jarkko Sakkinen <[email protected]>
Reviewed-by: Jasob Gunthorpe <[email protected]>
Reviewed-by: Stephan Berger <[email protected]>
---
Documentation/ABI/stable/sysfs-class-tpm | 22 +++++-----
drivers/char/tpm/tpm-chip.c | 72 +++++++++++++++++++++++++++-----
drivers/char/tpm/tpm-dev.c | 36 ++--------------
drivers/char/tpm/tpm-interface.c | 29 +++++++++++++
drivers/char/tpm/tpm.h | 12 ++++--
drivers/char/tpm/tpm_i2c_nuvoton.c | 2 +-
drivers/char/tpm/tpm_tis.c | 4 +-
7 files changed, 116 insertions(+), 61 deletions(-)
diff --git a/Documentation/ABI/stable/sysfs-class-tpm b/Documentation/ABI/stable/sysfs-class-tpm
index a60b45e..9f790ee 100644
--- a/Documentation/ABI/stable/sysfs-class-tpm
+++ b/Documentation/ABI/stable/sysfs-class-tpm
@@ -1,4 +1,4 @@
-What: /sys/class/misc/tpmX/device/
+What: /sys/class/tpm/tpmX/device/
Date: April 2005
KernelVersion: 2.6.12
Contact: [email protected]
@@ -6,7 +6,7 @@ Description: The device/ directory under a specific TPM instance exposes
the properties of that TPM chip
-What: /sys/class/misc/tpmX/device/active
+What: /sys/class/tpm/tpmX/device/active
Date: April 2006
KernelVersion: 2.6.17
Contact: [email protected]
@@ -18,7 +18,7 @@ Description: The "active" property prints a '1' if the TPM chip is accepting
section 17 for more information on which commands are
available.
-What: /sys/class/misc/tpmX/device/cancel
+What: /sys/class/tpm/tpmX/device/cancel
Date: June 2005
KernelVersion: 2.6.13
Contact: [email protected]
@@ -26,7 +26,7 @@ Description: The "cancel" property allows you to cancel the currently
pending TPM command. Writing any value to cancel will call the
TPM vendor specific cancel operation.
-What: /sys/class/misc/tpmX/device/caps
+What: /sys/class/tpm/tpmX/device/caps
Date: April 2005
KernelVersion: 2.6.12
Contact: [email protected]
@@ -43,7 +43,7 @@ Description: The "caps" property contains TPM manufacturer and version info.
the chip supports. Firmware version is that of the chip and
is manufacturer specific.
-What: /sys/class/misc/tpmX/device/durations
+What: /sys/class/tpm/tpmX/device/durations
Date: March 2011
KernelVersion: 3.1
Contact: [email protected]
@@ -66,7 +66,7 @@ Description: The "durations" property shows the 3 vendor-specific values
scaled to be displayed in usecs. In this case "[adjusted]"
will be displayed in place of "[original]".
-What: /sys/class/misc/tpmX/device/enabled
+What: /sys/class/tpm/tpmX/device/enabled
Date: April 2006
KernelVersion: 2.6.17
Contact: [email protected]
@@ -75,7 +75,7 @@ Description: The "enabled" property prints a '1' if the TPM chip is enabled,
may be visible but produce a '0' after some operation that
disables the TPM.
-What: /sys/class/misc/tpmX/device/owned
+What: /sys/class/tpm/tpmX/device/owned
Date: April 2006
KernelVersion: 2.6.17
Contact: [email protected]
@@ -83,7 +83,7 @@ Description: The "owned" property produces a '1' if the TPM_TakeOwnership
ordinal has been executed successfully in the chip. A '0'
indicates that ownership hasn't been taken.
-What: /sys/class/misc/tpmX/device/pcrs
+What: /sys/class/tpm/tpmX/device/pcrs
Date: April 2005
KernelVersion: 2.6.12
Contact: [email protected]
@@ -106,7 +106,7 @@ Description: The "pcrs" property will dump the current value of all Platform
1.2 chips, PCRs represent SHA-1 hashes, which are 20 bytes
long. Use the "caps" property to determine TPM version.
-What: /sys/class/misc/tpmX/device/pubek
+What: /sys/class/tpm/tpmX/device/pubek
Date: April 2005
KernelVersion: 2.6.12
Contact: [email protected]
@@ -158,7 +158,7 @@ Description: The "pubek" property will return the TPM's public endorsement
Modulus Length: 256 (bytes)
Modulus: The 256 byte Endorsement Key modulus
-What: /sys/class/misc/tpmX/device/temp_deactivated
+What: /sys/class/tpm/tpmX/device/temp_deactivated
Date: April 2006
KernelVersion: 2.6.17
Contact: [email protected]
@@ -167,7 +167,7 @@ Description: The "temp_deactivated" property returns a '1' if the chip has
cycle. Whether a warm boot (reboot) will clear a TPM chip
from a temp_deactivated state is platform specific.
-What: /sys/class/misc/tpmX/device/timeouts
+What: /sys/class/tpm/tpmX/device/timeouts
Date: March 2011
KernelVersion: 3.1
Contact: [email protected]
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
index e72b042..7596eef 100644
--- a/drivers/char/tpm/tpm-chip.c
+++ b/drivers/char/tpm/tpm-chip.c
@@ -25,6 +25,7 @@
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/freezer.h>
+#include <linux/major.h>
#include "tpm.h"
#include "tpm_eventlog.h"
@@ -32,6 +33,9 @@ static DECLARE_BITMAP(dev_mask, TPM_NUM_DEVICES);
static LIST_HEAD(tpm_chip_list);
static DEFINE_SPINLOCK(driver_lock);
+struct class *tpm_class;
+dev_t tpm_devt;
+
/*
* tpm_chip_find_get - return tpm_chip for a given chip number
* @chip_num the device number for the chip
@@ -55,16 +59,14 @@ struct tpm_chip *tpm_chip_find_get(int chip_num)
}
/**
- * tpmm_chip_remove() - free chip memory and device number
- * @data: points to struct tpm_chip instance
+ * tpm_dev_release() - free chip memory and the device number
+ * @dev: the character device for the TPM chip
*
- * This is used internally by tpmm_chip_alloc() and called by devres
- * when the device is released. This function does the opposite of
- * tpmm_chip_alloc() freeing memory and the device number.
+ * This is used as the release function for the character device.
*/
-static void tpmm_chip_remove(void *data)
+static void tpm_dev_release(struct device *dev)
{
- struct tpm_chip *chip = (struct tpm_chip *) data;
+ struct tpm_chip *chip = container_of(dev, struct tpm_chip, dev);
spin_lock(&driver_lock);
clear_bit(chip->dev_num, dev_mask);
@@ -111,18 +113,68 @@ struct tpm_chip *tpmm_chip_alloc(struct device *dev,
scnprintf(chip->devname, sizeof(chip->devname), "tpm%d", chip->dev_num);
chip->pdev = dev;
- devm_add_action(dev, tpmm_chip_remove, chip);
+
dev_set_drvdata(dev, chip);
+ chip->dev.class = tpm_class;
+ chip->dev.release = tpm_dev_release;
+ chip->dev.parent = chip->pdev;
+
+ if (chip->dev_num == 0)
+ chip->dev.devt = MKDEV(MISC_MAJOR, TPM_MINOR);
+ else
+ chip->dev.devt = MKDEV(MAJOR(tpm_devt), chip->dev_num);
+
+ dev_set_name(&chip->dev, chip->devname);
+
+ device_initialize(&chip->dev);
+
+ chip->cdev.owner = chip->pdev->driver->owner;
+ cdev_init(&chip->cdev, &tpm_fops);
+
return chip;
}
EXPORT_SYMBOL_GPL(tpmm_chip_alloc);
+static int tpm_dev_add_device(struct tpm_chip *chip)
+{
+ int rc;
+
+ rc = device_add(&chip->dev);
+ if (rc) {
+ dev_err(&chip->dev,
+ "unable to device_register() %s, major %d, minor %d, err=%d\n",
+ chip->devname, MAJOR(chip->dev.devt),
+ MINOR(chip->dev.devt), rc);
+
+ return rc;
+ }
+
+ rc = cdev_add(&chip->cdev, chip->dev.devt, 1);
+ if (rc) {
+ dev_err(&chip->dev,
+ "unable to cdev_add() %s, major %d, minor %d, err=%d\n",
+ chip->devname, MAJOR(chip->dev.devt),
+ MINOR(chip->dev.devt), rc);
+
+ device_unregister(&chip->dev);
+ return rc;
+ }
+
+ return rc;
+}
+
+static void tpm_dev_del_device(struct tpm_chip *chip)
+{
+ cdev_del(&chip->cdev);
+ device_unregister(&chip->dev);
+}
+
/*
- * tpm_chip_register() - create a misc driver for the TPM chip
+ * tpm_chip_register() - create a character device for the TPM chip
* @chip: TPM chip to use.
*
- * Creates a misc driver for the TPM chip and adds sysfs interfaces for
+ * Creates a character device for the TPM chip and adds sysfs interfaces for
* the device, PPI and TCPA. As the last step this function adds the
* chip to the list of TPM chips available for use.
*
diff --git a/drivers/char/tpm/tpm-dev.c b/drivers/char/tpm/tpm-dev.c
index 3568321..de0337e 100644
--- a/drivers/char/tpm/tpm-dev.c
+++ b/drivers/char/tpm/tpm-dev.c
@@ -17,7 +17,6 @@
* License.
*
*/
-#include <linux/miscdevice.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include "tpm.h"
@@ -54,9 +53,8 @@ static void timeout_work(struct work_struct *work)
static int tpm_open(struct inode *inode, struct file *file)
{
- struct miscdevice *misc = file->private_data;
- struct tpm_chip *chip = container_of(misc, struct tpm_chip,
- vendor.miscdev);
+ struct tpm_chip *chip =
+ container_of(inode->i_cdev, struct tpm_chip, cdev);
struct file_priv *priv;
/* It's assured that the chip will be opened just once,
@@ -173,7 +171,7 @@ static int tpm_release(struct inode *inode, struct file *file)
return 0;
}
-static const struct file_operations tpm_fops = {
+const struct file_operations tpm_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.open = tpm_open,
@@ -182,32 +180,4 @@ static const struct file_operations tpm_fops = {
.release = tpm_release,
};
-int tpm_dev_add_device(struct tpm_chip *chip)
-{
- int rc;
- chip->vendor.miscdev.fops = &tpm_fops;
- if (chip->dev_num == 0)
- chip->vendor.miscdev.minor = TPM_MINOR;
- else
- chip->vendor.miscdev.minor = MISC_DYNAMIC_MINOR;
-
- chip->vendor.miscdev.name = chip->devname;
- chip->vendor.miscdev.parent = chip->pdev;
-
- rc = misc_register(&chip->vendor.miscdev);
- if (rc) {
- chip->vendor.miscdev.name = NULL;
- dev_err(chip->pdev,
- "unable to misc_register %s, minor %d err=%d\n",
- chip->vendor.miscdev.name,
- chip->vendor.miscdev.minor, rc);
- }
- return rc;
-}
-
-void tpm_dev_del_device(struct tpm_chip *chip)
-{
- if (chip->vendor.miscdev.name)
- misc_deregister(&chip->vendor.miscdev);
-}
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index e2af28f..b6f6b17 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -997,6 +997,35 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max)
}
EXPORT_SYMBOL_GPL(tpm_get_random);
+static int __init tpm_init(void)
+{
+ int rc;
+
+ tpm_class = class_create(THIS_MODULE, "tpm");
+ if (IS_ERR(tpm_class)) {
+ pr_err("couldn't create tpm class\n");
+ return PTR_ERR(tpm_class);
+ }
+
+ rc = alloc_chrdev_region(&tpm_devt, 0, TPM_NUM_DEVICES, "tpm");
+ if (rc < 0) {
+ pr_err("tpm: failed to allocate char dev region\n");
+ class_destroy(tpm_class);
+ return rc;
+ }
+
+ return 0;
+}
+
+static void __exit tpm_exit(void)
+{
+ class_destroy(tpm_class);
+ unregister_chrdev_region(tpm_devt, TPM_NUM_DEVICES);
+}
+
+subsys_initcall(tpm_init);
+module_exit(tpm_exit);
+
MODULE_AUTHOR("Leendert van Doorn ([email protected])");
MODULE_DESCRIPTION("TPM Driver");
MODULE_VERSION("2.0");
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index adf6af8..d46765b 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -23,11 +23,11 @@
#include <linux/fs.h>
#include <linux/mutex.h>
#include <linux/sched.h>
-#include <linux/miscdevice.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/tpm.h>
#include <linux/acpi.h>
+#include <linux/cdev.h>
enum tpm_const {
TPM_MINOR = 224, /* officially assigned */
@@ -74,7 +74,6 @@ struct tpm_vendor_specific {
int region_size;
int have_region;
- struct miscdevice miscdev;
struct list_head list;
int locality;
unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */
@@ -104,6 +103,9 @@ enum tpm_chip_flags {
struct tpm_chip {
struct device *pdev; /* Device stuff */
+ struct device dev;
+ struct cdev cdev;
+
const struct tpm_class_ops *ops;
unsigned int flags;
@@ -326,6 +328,10 @@ struct tpm_cmd_t {
tpm_cmd_params params;
} __packed;
+extern struct class *tpm_class;
+extern dev_t tpm_devt;
+extern const struct file_operations tpm_fops;
+
ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *);
ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
size_t bufsiz);
@@ -346,8 +352,6 @@ extern struct tpm_chip *tpmm_chip_alloc(struct device *dev,
extern int tpm_chip_register(struct tpm_chip *chip);
extern void tpm_chip_unregister(struct tpm_chip *chip);
-int tpm_dev_add_device(struct tpm_chip *chip);
-void tpm_dev_del_device(struct tpm_chip *chip);
int tpm_sysfs_add_device(struct tpm_chip *chip);
void tpm_sysfs_del_device(struct tpm_chip *chip);
diff --git a/drivers/char/tpm/tpm_i2c_nuvoton.c b/drivers/char/tpm/tpm_i2c_nuvoton.c
index e1eadb0..9d42b7d 100644
--- a/drivers/char/tpm/tpm_i2c_nuvoton.c
+++ b/drivers/char/tpm/tpm_i2c_nuvoton.c
@@ -560,7 +560,7 @@ static int i2c_nuvoton_probe(struct i2c_client *client,
rc = devm_request_irq(dev, chip->vendor.irq,
i2c_nuvoton_int_handler,
IRQF_TRIGGER_LOW,
- chip->vendor.miscdev.name,
+ chip->devname,
chip);
if (rc) {
dev_err(dev, "%s() Unable to request irq: %d for use\n",
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index 6b15545..89e1abb 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -698,7 +698,7 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
TPM_INT_VECTOR(chip->vendor.locality));
if (devm_request_irq
(dev, i, tis_int_probe, IRQF_SHARED,
- chip->vendor.miscdev.name, chip) != 0) {
+ chip->devname, chip) != 0) {
dev_info(chip->pdev,
"Unable to request irq: %d for probe\n",
i);
@@ -745,7 +745,7 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
TPM_INT_VECTOR(chip->vendor.locality));
if (devm_request_irq
(dev, chip->vendor.irq, tis_int_handler, IRQF_SHARED,
- chip->vendor.miscdev.name, chip) != 0) {
+ chip->devname, chip) != 0) {
dev_info(chip->pdev,
"Unable to request irq: %d for use\n",
chip->vendor.irq);
--
2.1.0
tpm_register_hardware() and tpm_remove_hardware() are called often
before initializing the device. The problem is that the device might
not be fully initialized when it comes visible to the user space.
This patch resolves the issue by diving initialization into two
parts:
- tpmm_chip_alloc() creates struct tpm_chip.
- tpm_chip_register() sets up the character device and sysfs
attributes.
The framework takes care of freeing struct tpm_chip by using the devres
API. The broken release callback has been wiped. ACPI drivers do not
ever get this callback.
Regards to Jason Gunthorpe for carefully reviewing this part of the
code.
Signed-off-by: Jarkko Sakkinen <[email protected]>
Reviewed-by: Jasob Gunthorpe <[email protected]>
Reviewed-by: Stephan Berger <[email protected]>
---
drivers/char/tpm/Makefile | 2 +-
drivers/char/tpm/tpm-chip.c | 199 ++++++++++++++++++++++++++++++++++++
drivers/char/tpm/tpm-interface.c | 148 +--------------------------
drivers/char/tpm/tpm.h | 16 ++-
drivers/char/tpm/tpm_atmel.c | 11 +-
drivers/char/tpm/tpm_i2c_atmel.c | 39 ++-----
drivers/char/tpm/tpm_i2c_infineon.c | 37 ++-----
drivers/char/tpm/tpm_i2c_nuvoton.c | 47 +++------
drivers/char/tpm/tpm_i2c_stm_st33.c | 14 +--
drivers/char/tpm/tpm_ibmvtpm.c | 17 ++-
drivers/char/tpm/tpm_infineon.c | 29 +++---
drivers/char/tpm/tpm_nsc.c | 14 ++-
drivers/char/tpm/tpm_tis.c | 80 ++++++---------
drivers/char/tpm/xen-tpmfront.c | 14 +--
14 files changed, 329 insertions(+), 338 deletions(-)
create mode 100644 drivers/char/tpm/tpm-chip.c
diff --git a/drivers/char/tpm/Makefile b/drivers/char/tpm/Makefile
index 7f54dae..c715596 100644
--- a/drivers/char/tpm/Makefile
+++ b/drivers/char/tpm/Makefile
@@ -2,7 +2,7 @@
# Makefile for the kernel tpm device drivers.
#
obj-$(CONFIG_TCG_TPM) += tpm.o
-tpm-y := tpm-interface.o tpm-dev.o tpm-sysfs.o
+tpm-y := tpm-interface.o tpm-dev.o tpm-sysfs.o tpm-chip.o
tpm-$(CONFIG_ACPI) += tpm_ppi.o
ifdef CONFIG_ACPI
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
new file mode 100644
index 0000000..7dc9999
--- /dev/null
+++ b/drivers/char/tpm/tpm-chip.c
@@ -0,0 +1,199 @@
+/*
+ * Copyright (C) 2004 IBM Corporation
+ * Copyright (C) 2014 Intel Corporation
+ *
+ * Authors:
+ * Jarkko Sakkinen <[email protected]>
+ * Leendert van Doorn <[email protected]>
+ * Dave Safford <[email protected]>
+ * Reiner Sailer <[email protected]>
+ * Kylene Hall <[email protected]>
+ *
+ * Maintained by: <[email protected]>
+ *
+ * TPM chip management routines.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, version 2 of the
+ * License.
+ *
+ */
+
+#include <linux/poll.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+#include <linux/freezer.h>
+#include "tpm.h"
+#include "tpm_eventlog.h"
+
+static DECLARE_BITMAP(dev_mask, TPM_NUM_DEVICES);
+static LIST_HEAD(tpm_chip_list);
+static DEFINE_SPINLOCK(driver_lock);
+
+/*
+ * tpm_chip_find_get - return tpm_chip for a given chip number
+ * @chip_num the device number for the chip
+ */
+struct tpm_chip *tpm_chip_find_get(int chip_num)
+{
+ struct tpm_chip *pos, *chip = NULL;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(pos, &tpm_chip_list, list) {
+ if (chip_num != TPM_ANY_NUM && chip_num != pos->dev_num)
+ continue;
+
+ if (try_module_get(pos->dev->driver->owner)) {
+ chip = pos;
+ break;
+ }
+ }
+ rcu_read_unlock();
+ return chip;
+}
+
+/**
+ * tpmm_chip_remove() - free chip memory and device number
+ * @data: points to struct tpm_chip instance
+ *
+ * This is used internally by tpmm_chip_alloc() and called by devres
+ * when the device is released. This function does the opposite of
+ * tpmm_chip_alloc() freeing memory and the device number.
+ */
+static void tpmm_chip_remove(void *data)
+{
+ struct tpm_chip *chip = (struct tpm_chip *) data;
+
+ spin_lock(&driver_lock);
+ clear_bit(chip->dev_num, dev_mask);
+ spin_unlock(&driver_lock);
+ kfree(chip);
+}
+
+/**
+ * tpmm_chip_alloc() - allocate a new struct tpm_chip instance
+ * @dev: device to which the chip is associated
+ * @ops: struct tpm_class_ops instance
+ *
+ * Allocates a new struct tpm_chip instance and assigns a free
+ * device number for it. Caller does not have to worry about
+ * freeing the allocated resources. When the devices is removed
+ * devres calls tpmm_chip_remove() to do the job.
+ */
+struct tpm_chip *tpmm_chip_alloc(struct device *dev,
+ const struct tpm_class_ops *ops)
+{
+ struct tpm_chip *chip;
+
+ chip = kzalloc(sizeof(*chip), GFP_KERNEL);
+ if (chip == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ mutex_init(&chip->tpm_mutex);
+ INIT_LIST_HEAD(&chip->list);
+
+ chip->ops = ops;
+
+ spin_lock(&driver_lock);
+ chip->dev_num = find_first_zero_bit(dev_mask, TPM_NUM_DEVICES);
+ spin_unlock(&driver_lock);
+
+ if (chip->dev_num >= TPM_NUM_DEVICES) {
+ dev_err(dev, "No available tpm device numbers\n");
+ kfree(chip);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ set_bit(chip->dev_num, dev_mask);
+
+ scnprintf(chip->devname, sizeof(chip->devname), "tpm%d", chip->dev_num);
+
+ chip->dev = dev;
+ devm_add_action(dev, tpmm_chip_remove, chip);
+ dev_set_drvdata(dev, chip);
+
+ return chip;
+}
+EXPORT_SYMBOL_GPL(tpmm_chip_alloc);
+
+/*
+ * tpm_chip_register() - create a misc driver for the TPM chip
+ * @chip: TPM chip to use.
+ *
+ * Creates a misc driver for the TPM chip and adds sysfs interfaces for
+ * the device, PPI and TCPA. As the last step this function adds the
+ * chip to the list of TPM chips available for use.
+ *
+ * NOTE: This function should be only called after the chip initialization
+ * is complete.
+ *
+ * Called from tpm_<specific>.c probe function only for devices
+ * the driver has determined it should claim. Prior to calling
+ * this function the specific probe function has called pci_enable_device
+ * upon errant exit from this function specific probe function should call
+ * pci_disable_device
+ */
+int tpm_chip_register(struct tpm_chip *chip)
+{
+ int rc;
+
+ rc = tpm_dev_add_device(chip);
+ if (rc)
+ return rc;
+
+ rc = tpm_sysfs_add_device(chip);
+ if (rc)
+ goto del_misc;
+
+ rc = tpm_add_ppi(&chip->dev->kobj);
+ if (rc)
+ goto del_sysfs;
+
+ chip->bios_dir = tpm_bios_log_setup(chip->devname);
+
+ /* Make the chip available. */
+ spin_lock(&driver_lock);
+ list_add_rcu(&chip->list, &tpm_chip_list);
+ spin_unlock(&driver_lock);
+
+ chip->flags |= TPM_CHIP_FLAG_REGISTERED;
+
+ return 0;
+del_sysfs:
+ tpm_sysfs_del_device(chip);
+del_misc:
+ tpm_dev_del_device(chip);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(tpm_chip_register);
+
+/*
+ * tpm_chip_unregister() - release the TPM driver
+ * @chip: TPM chip to use.
+ *
+ * Takes the chip first away from the list of available TPM chips and then
+ * cleans up all the resources reserved by tpm_chip_register().
+ *
+ * NOTE: This function should be only called before deinitializing chip
+ * resources.
+ */
+void tpm_chip_unregister(struct tpm_chip *chip)
+{
+ if (!(chip->flags & TPM_CHIP_FLAG_REGISTERED))
+ return;
+
+ spin_lock(&driver_lock);
+ list_del_rcu(&chip->list);
+ spin_unlock(&driver_lock);
+ synchronize_rcu();
+
+ if (chip->bios_dir)
+ tpm_bios_log_teardown(chip->bios_dir);
+ tpm_remove_ppi(&chip->dev->kobj);
+ tpm_sysfs_del_device(chip);
+
+ tpm_dev_del_device(chip);
+}
+EXPORT_SYMBOL_GPL(tpm_chip_unregister);
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index c17aa45..4dbed1e 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -1,5 +1,6 @@
/*
* Copyright (C) 2004 IBM Corporation
+ * Copyright (C) 2014 Intel Corporation
*
* Authors:
* Leendert van Doorn <[email protected]>
@@ -47,10 +48,6 @@ module_param_named(suspend_pcr, tpm_suspend_pcr, uint, 0644);
MODULE_PARM_DESC(suspend_pcr,
"PCR to use for dummy writes to faciltate flush on suspend.");
-static LIST_HEAD(tpm_chip_list);
-static DEFINE_SPINLOCK(driver_lock);
-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
@@ -639,27 +636,6 @@ static int tpm_continue_selftest(struct tpm_chip *chip)
return rc;
}
-/*
- * tpm_chip_find_get - return tpm_chip for given chip number
- */
-static struct tpm_chip *tpm_chip_find_get(int chip_num)
-{
- struct tpm_chip *pos, *chip = NULL;
-
- rcu_read_lock();
- list_for_each_entry_rcu(pos, &tpm_chip_list, list) {
- if (chip_num != TPM_ANY_NUM && chip_num != pos->dev_num)
- continue;
-
- if (try_module_get(pos->dev->driver->owner)) {
- chip = pos;
- break;
- }
- }
- rcu_read_unlock();
- return chip;
-}
-
#define TPM_ORDINAL_PCRREAD cpu_to_be32(21)
#define READ_PCR_RESULT_SIZE 30
static struct tpm_input_header pcrread_header = {
@@ -887,30 +863,6 @@ again:
}
EXPORT_SYMBOL_GPL(wait_for_tpm_stat);
-void tpm_remove_hardware(struct device *dev)
-{
- struct tpm_chip *chip = dev_get_drvdata(dev);
-
- if (chip == NULL) {
- dev_err(dev, "No device data found\n");
- return;
- }
-
- spin_lock(&driver_lock);
- list_del_rcu(&chip->list);
- spin_unlock(&driver_lock);
- synchronize_rcu();
-
- tpm_dev_del_device(chip);
- tpm_sysfs_del_device(chip);
- tpm_remove_ppi(&dev->kobj);
- tpm_bios_log_teardown(chip->bios_dir);
-
- /* write it this way to be explicit (chip->dev == dev) */
- put_device(chip->dev);
-}
-EXPORT_SYMBOL_GPL(tpm_remove_hardware);
-
#define TPM_ORD_SAVESTATE cpu_to_be32(152)
#define SAVESTATE_RESULT_SIZE 10
@@ -1044,104 +996,6 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max)
}
EXPORT_SYMBOL_GPL(tpm_get_random);
-/* In case vendor provided release function, call it too.*/
-
-void tpm_dev_vendor_release(struct tpm_chip *chip)
-{
- if (!chip)
- return;
-
- clear_bit(chip->dev_num, dev_mask);
-}
-EXPORT_SYMBOL_GPL(tpm_dev_vendor_release);
-
-
-/*
- * Once all references to platform device are down to 0,
- * release all allocated structures.
- */
-static void tpm_dev_release(struct device *dev)
-{
- struct tpm_chip *chip = dev_get_drvdata(dev);
-
- if (!chip)
- return;
-
- tpm_dev_vendor_release(chip);
-
- chip->release(dev);
- kfree(chip);
-}
-
-/*
- * Called from tpm_<specific>.c probe function only for devices
- * the driver has determined it should claim. Prior to calling
- * this function the specific probe function has called pci_enable_device
- * upon errant exit from this function specific probe function should call
- * pci_disable_device
- */
-struct tpm_chip *tpm_register_hardware(struct device *dev,
- const struct tpm_class_ops *ops)
-{
- struct tpm_chip *chip;
-
- /* Driver specific per-device data */
- chip = kzalloc(sizeof(*chip), GFP_KERNEL);
-
- if (chip == NULL)
- return NULL;
-
- mutex_init(&chip->tpm_mutex);
- INIT_LIST_HEAD(&chip->list);
-
- chip->ops = ops;
- chip->dev_num = find_first_zero_bit(dev_mask, TPM_NUM_DEVICES);
-
- if (chip->dev_num >= TPM_NUM_DEVICES) {
- dev_err(dev, "No available tpm device numbers\n");
- goto out_free;
- }
-
- set_bit(chip->dev_num, dev_mask);
-
- scnprintf(chip->devname, sizeof(chip->devname), "%s%d", "tpm",
- chip->dev_num);
-
- chip->dev = get_device(dev);
- chip->release = dev->release;
- dev->release = tpm_dev_release;
- dev_set_drvdata(dev, chip);
-
- if (tpm_dev_add_device(chip))
- goto put_device;
-
- if (tpm_sysfs_add_device(chip))
- goto del_misc;
-
- if (tpm_add_ppi(&dev->kobj))
- goto del_sysfs;
-
- chip->bios_dir = tpm_bios_log_setup(chip->devname);
-
- /* Make chip available */
- spin_lock(&driver_lock);
- list_add_tail_rcu(&chip->list, &tpm_chip_list);
- spin_unlock(&driver_lock);
-
- return chip;
-
-del_sysfs:
- tpm_sysfs_del_device(chip);
-del_misc:
- tpm_dev_del_device(chip);
-put_device:
- put_device(chip->dev);
-out_free:
- kfree(chip);
- return NULL;
-}
-EXPORT_SYMBOL_GPL(tpm_register_hardware);
-
MODULE_AUTHOR("Leendert van Doorn ([email protected])");
MODULE_DESCRIPTION("TPM Driver");
MODULE_VERSION("2.0");
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index e638eb0..72ff18c 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -94,9 +94,14 @@ struct tpm_vendor_specific {
#define TPM_VID_WINBOND 0x1050
#define TPM_VID_STM 0x104A
+enum tpm_chip_flags {
+ TPM_CHIP_FLAG_REGISTERED = BIT(0),
+};
+
struct tpm_chip {
struct device *dev; /* Device stuff */
const struct tpm_class_ops *ops;
+ unsigned int flags;
int dev_num; /* /dev/tpm# */
char devname[7];
@@ -110,7 +115,6 @@ struct tpm_chip {
struct dentry **bios_dir;
struct list_head list;
- void (*release) (struct device *);
};
#define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor)
@@ -322,15 +326,17 @@ extern int tpm_get_timeouts(struct tpm_chip *);
extern void tpm_gen_interrupt(struct tpm_chip *);
extern int tpm_do_selftest(struct tpm_chip *);
extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32);
-extern struct tpm_chip* tpm_register_hardware(struct device *,
- const struct tpm_class_ops *ops);
-extern void tpm_dev_vendor_release(struct tpm_chip *);
-extern void tpm_remove_hardware(struct device *);
extern int tpm_pm_suspend(struct device *);
extern int tpm_pm_resume(struct device *);
extern int wait_for_tpm_stat(struct tpm_chip *, u8, unsigned long,
wait_queue_head_t *, bool);
+struct tpm_chip *tpm_chip_find_get(int chip_num);
+extern struct tpm_chip *tpmm_chip_alloc(struct device *dev,
+ const struct tpm_class_ops *ops);
+extern int tpm_chip_register(struct tpm_chip *chip);
+extern void tpm_chip_unregister(struct tpm_chip *chip);
+
int tpm_dev_add_device(struct tpm_chip *chip);
void tpm_dev_del_device(struct tpm_chip *chip);
int tpm_sysfs_add_device(struct tpm_chip *chip);
diff --git a/drivers/char/tpm/tpm_atmel.c b/drivers/char/tpm/tpm_atmel.c
index 6069d13..8e2576a 100644
--- a/drivers/char/tpm/tpm_atmel.c
+++ b/drivers/char/tpm/tpm_atmel.c
@@ -138,11 +138,11 @@ static void atml_plat_remove(void)
struct tpm_chip *chip = dev_get_drvdata(&pdev->dev);
if (chip) {
+ tpm_chip_unregister(chip);
if (chip->vendor.have_region)
atmel_release_region(chip->vendor.base,
chip->vendor.region_size);
atmel_put_base_addr(chip->vendor.iobase);
- tpm_remove_hardware(chip->dev);
platform_device_unregister(pdev);
}
}
@@ -184,8 +184,9 @@ static int __init init_atmel(void)
goto err_rel_reg;
}
- if (!(chip = tpm_register_hardware(&pdev->dev, &tpm_atmel))) {
- rc = -ENODEV;
+ chip = tpmm_chip_alloc(&pdev->dev, &tpm_atmel);
+ if (IS_ERR(chip)) {
+ rc = PTR_ERR(chip);
goto err_unreg_dev;
}
@@ -194,6 +195,10 @@ static int __init init_atmel(void)
chip->vendor.have_region = have_region;
chip->vendor.region_size = region_size;
+ rc = tpm_chip_register(chip);
+ if (rc)
+ goto err_unreg_dev;
+
return 0;
err_unreg_dev:
diff --git a/drivers/char/tpm/tpm_i2c_atmel.c b/drivers/char/tpm/tpm_i2c_atmel.c
index 5f44888..643a940 100644
--- a/drivers/char/tpm/tpm_i2c_atmel.c
+++ b/drivers/char/tpm/tpm_i2c_atmel.c
@@ -153,25 +153,20 @@ static const struct tpm_class_ops i2c_atmel = {
static int i2c_atmel_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
- int rc;
struct tpm_chip *chip;
struct device *dev = &client->dev;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
return -ENODEV;
- chip = tpm_register_hardware(dev, &i2c_atmel);
- if (!chip) {
- dev_err(dev, "%s() error in tpm_register_hardware\n", __func__);
- return -ENODEV;
- }
+ chip = tpmm_chip_alloc(dev, &i2c_atmel);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
chip->vendor.priv = devm_kzalloc(dev, sizeof(struct priv_data),
GFP_KERNEL);
- if (!chip->vendor.priv) {
- rc = -ENOMEM;
- goto out_err;
- }
+ if (!chip->vendor.priv)
+ return -ENOMEM;
/* Default timeouts */
chip->vendor.timeout_a = msecs_to_jiffies(TPM_I2C_SHORT_TIMEOUT);
@@ -183,32 +178,20 @@ static int i2c_atmel_probe(struct i2c_client *client,
/* There is no known way to probe for this device, and all version
* information seems to be read via TPM commands. Thus we rely on the
* TPM startup process in the common code to detect the device. */
- if (tpm_get_timeouts(chip)) {
- rc = -ENODEV;
- goto out_err;
- }
-
- if (tpm_do_selftest(chip)) {
- rc = -ENODEV;
- goto out_err;
- }
+ if (tpm_get_timeouts(chip))
+ return -ENODEV;
- return 0;
+ if (tpm_do_selftest(chip))
+ return -ENODEV;
-out_err:
- tpm_dev_vendor_release(chip);
- tpm_remove_hardware(chip->dev);
- return rc;
+ return tpm_chip_register(chip);
}
static int i2c_atmel_remove(struct i2c_client *client)
{
struct device *dev = &(client->dev);
struct tpm_chip *chip = dev_get_drvdata(dev);
-
- tpm_dev_vendor_release(chip);
- tpm_remove_hardware(dev);
- kfree(chip);
+ tpm_chip_unregister(chip);
return 0;
}
diff --git a/drivers/char/tpm/tpm_i2c_infineon.c b/drivers/char/tpm/tpm_i2c_infineon.c
index 472af4b..03708e6 100644
--- a/drivers/char/tpm/tpm_i2c_infineon.c
+++ b/drivers/char/tpm/tpm_i2c_infineon.c
@@ -581,12 +581,9 @@ static int tpm_tis_i2c_init(struct device *dev)
int rc = 0;
struct tpm_chip *chip;
- chip = tpm_register_hardware(dev, &tpm_tis_i2c);
- if (!chip) {
- dev_err(dev, "could not register hardware\n");
- rc = -ENODEV;
- goto out_err;
- }
+ chip = tpmm_chip_alloc(dev, &tpm_tis_i2c);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
/* Disable interrupts */
chip->vendor.irq = 0;
@@ -600,7 +597,7 @@ static int tpm_tis_i2c_init(struct device *dev)
if (request_locality(chip, 0) != 0) {
dev_err(dev, "could not request locality\n");
rc = -ENODEV;
- goto out_vendor;
+ goto out_err;
}
/* read four bytes from DID_VID register */
@@ -628,21 +625,9 @@ static int tpm_tis_i2c_init(struct device *dev)
tpm_get_timeouts(chip);
tpm_do_selftest(chip);
- return 0;
-
+ return tpm_chip_register(chip);
out_release:
release_locality(chip, chip->vendor.locality, 1);
-
-out_vendor:
- /* close file handles */
- tpm_dev_vendor_release(chip);
-
- /* remove hardware */
- tpm_remove_hardware(chip->dev);
-
- /* reset these pointers, otherwise we oops */
- chip->dev->release = NULL;
- chip->release = NULL;
tpm_dev.client = NULL;
out_err:
return rc;
@@ -712,17 +697,9 @@ static int tpm_tis_i2c_probe(struct i2c_client *client,
static int tpm_tis_i2c_remove(struct i2c_client *client)
{
struct tpm_chip *chip = tpm_dev.chip;
- release_locality(chip, chip->vendor.locality, 1);
- /* close file handles */
- tpm_dev_vendor_release(chip);
-
- /* remove hardware */
- tpm_remove_hardware(chip->dev);
-
- /* reset these pointers, otherwise we oops */
- chip->dev->release = NULL;
- chip->release = NULL;
+ tpm_chip_unregister(chip);
+ release_locality(chip, chip->vendor.locality, 1);
tpm_dev.client = NULL;
return 0;
diff --git a/drivers/char/tpm/tpm_i2c_nuvoton.c b/drivers/char/tpm/tpm_i2c_nuvoton.c
index bbb4997..8c23088 100644
--- a/drivers/char/tpm/tpm_i2c_nuvoton.c
+++ b/drivers/char/tpm/tpm_i2c_nuvoton.c
@@ -530,18 +530,14 @@ static int i2c_nuvoton_probe(struct i2c_client *client,
dev_info(dev, "VID: %04X DID: %02X RID: %02X\n", (u16) vid,
(u8) (vid >> 16), (u8) (vid >> 24));
- chip = tpm_register_hardware(dev, &tpm_i2c);
- if (!chip) {
- dev_err(dev, "%s() error in tpm_register_hardware\n", __func__);
- return -ENODEV;
- }
+ chip = tpmm_chip_alloc(dev, &tpm_i2c);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
chip->vendor.priv = devm_kzalloc(dev, sizeof(struct priv_data),
GFP_KERNEL);
- if (!chip->vendor.priv) {
- rc = -ENOMEM;
- goto out_err;
- }
+ if (!chip->vendor.priv)
+ return -ENOMEM;
init_waitqueue_head(&chip->vendor.read_queue);
init_waitqueue_head(&chip->vendor.int_queue);
@@ -589,7 +585,7 @@ static int i2c_nuvoton_probe(struct i2c_client *client,
TPM_DATA_FIFO_W,
1, (u8 *) (&rc));
if (rc < 0)
- goto out_err;
+ return rc;
/* TPM_STS <- 0x40 (commandReady) */
i2c_nuvoton_ready(chip);
} else {
@@ -599,44 +595,29 @@ static int i2c_nuvoton_probe(struct i2c_client *client,
* only TPM_STS_VALID should be set
*/
if (i2c_nuvoton_read_status(chip) !=
- TPM_STS_VALID) {
- rc = -EIO;
- goto out_err;
- }
+ TPM_STS_VALID)
+ return -EIO;
}
}
}
- if (tpm_get_timeouts(chip)) {
- rc = -ENODEV;
- goto out_err;
- }
-
- if (tpm_do_selftest(chip)) {
- rc = -ENODEV;
- goto out_err;
- }
+ if (tpm_get_timeouts(chip))
+ return -ENODEV;
- return 0;
+ if (tpm_do_selftest(chip))
+ return -ENODEV;
-out_err:
- tpm_dev_vendor_release(chip);
- tpm_remove_hardware(chip->dev);
- return rc;
+ return tpm_chip_register(chip);
}
static int i2c_nuvoton_remove(struct i2c_client *client)
{
struct device *dev = &(client->dev);
struct tpm_chip *chip = dev_get_drvdata(dev);
-
- tpm_dev_vendor_release(chip);
- tpm_remove_hardware(dev);
- kfree(chip);
+ tpm_chip_unregister(chip);
return 0;
}
-
static const struct i2c_device_id i2c_nuvoton_id[] = {
{I2C_DRIVER_NAME, 0},
{}
diff --git a/drivers/char/tpm/tpm_i2c_stm_st33.c b/drivers/char/tpm/tpm_i2c_stm_st33.c
index 86203b0..9a96d37 100644
--- a/drivers/char/tpm/tpm_i2c_stm_st33.c
+++ b/drivers/char/tpm/tpm_i2c_stm_st33.c
@@ -735,11 +735,9 @@ tpm_stm_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
if (!tpm_dev)
return -ENOMEM;
- chip = tpm_register_hardware(&client->dev, &st_i2c_tpm);
- if (!chip) {
- dev_info(&client->dev, "fail chip\n");
- return -ENODEV;
- }
+ chip = tpmm_chip_alloc(&client->dev, &st_i2c_tpm);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
TPM_VPRIV(chip) = tpm_dev;
tpm_dev->client = client;
@@ -807,10 +805,8 @@ tpm_stm_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
tpm_get_timeouts(chip);
tpm_do_selftest(chip);
- dev_info(chip->dev, "TPM I2C Initialized\n");
- return 0;
+ return tpm_chip_register(chip);
_tpm_clean_answer:
- tpm_remove_hardware(chip->dev);
dev_info(chip->dev, "TPM I2C initialisation fail\n");
return ret;
}
@@ -827,7 +823,7 @@ static int tpm_stm_i2c_remove(struct i2c_client *client)
(struct tpm_chip *) i2c_get_clientdata(client);
if (chip)
- tpm_remove_hardware(chip->dev);
+ tpm_chip_unregister(chip);
return 0;
}
diff --git a/drivers/char/tpm/tpm_ibmvtpm.c b/drivers/char/tpm/tpm_ibmvtpm.c
index 4109222..d594610 100644
--- a/drivers/char/tpm/tpm_ibmvtpm.c
+++ b/drivers/char/tpm/tpm_ibmvtpm.c
@@ -270,8 +270,11 @@ static int ibmvtpm_crq_send_init(struct ibmvtpm_dev *ibmvtpm)
static int tpm_ibmvtpm_remove(struct vio_dev *vdev)
{
struct ibmvtpm_dev *ibmvtpm = ibmvtpm_get_data(&vdev->dev);
+ struct tpm_chip *chip = dev_get_drvdata(ibmvtpm->dev);
int rc = 0;
+ tpm_chip_unregister(chip);
+
free_irq(vdev->irq, ibmvtpm);
do {
@@ -290,8 +293,6 @@ static int tpm_ibmvtpm_remove(struct vio_dev *vdev)
kfree(ibmvtpm->rtce_buf);
}
- tpm_remove_hardware(ibmvtpm->dev);
-
kfree(ibmvtpm);
return 0;
@@ -563,11 +564,9 @@ static int tpm_ibmvtpm_probe(struct vio_dev *vio_dev,
struct tpm_chip *chip;
int rc = -ENOMEM, rc1;
- chip = tpm_register_hardware(dev, &tpm_ibmvtpm);
- if (!chip) {
- dev_err(dev, "tpm_register_hardware failed\n");
- return -ENODEV;
- }
+ chip = tpmm_chip_alloc(dev, &tpm_ibmvtpm);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
ibmvtpm = kzalloc(sizeof(struct ibmvtpm_dev), GFP_KERNEL);
if (!ibmvtpm) {
@@ -637,7 +636,7 @@ static int tpm_ibmvtpm_probe(struct vio_dev *vio_dev,
if (rc)
goto init_irq_cleanup;
- return rc;
+ return tpm_chip_register(chip);
init_irq_cleanup:
do {
rc1 = plpar_hcall_norets(H_FREE_CRQ, vio_dev->unit_address);
@@ -652,8 +651,6 @@ cleanup:
kfree(ibmvtpm);
}
- tpm_remove_hardware(dev);
-
return rc;
}
diff --git a/drivers/char/tpm/tpm_infineon.c b/drivers/char/tpm/tpm_infineon.c
index dc0a255..dcdb671 100644
--- a/drivers/char/tpm/tpm_infineon.c
+++ b/drivers/char/tpm/tpm_infineon.c
@@ -546,7 +546,14 @@ static int tpm_inf_pnp_probe(struct pnp_dev *dev,
vendorid[0], vendorid[1],
productid[0], productid[1], chipname);
- if (!(chip = tpm_register_hardware(&dev->dev, &tpm_inf)))
+ chip = tpmm_chip_alloc(&dev->dev, &tpm_inf);
+ if (IS_ERR(chip)) {
+ rc = PTR_ERR(chip);
+ goto err_release_region;
+ }
+
+ rc = tpm_chip_register(chip);
+ if (rc)
goto err_release_region;
return 0;
@@ -572,17 +579,15 @@ static void tpm_inf_pnp_remove(struct pnp_dev *dev)
{
struct tpm_chip *chip = pnp_get_drvdata(dev);
- if (chip) {
- if (tpm_dev.iotype == TPM_INF_IO_PORT) {
- release_region(tpm_dev.data_regs, tpm_dev.data_size);
- release_region(tpm_dev.config_port,
- tpm_dev.config_size);
- } else {
- iounmap(tpm_dev.mem_base);
- release_mem_region(tpm_dev.map_base, tpm_dev.map_size);
- }
- tpm_dev_vendor_release(chip);
- tpm_remove_hardware(chip->dev);
+ tpm_chip_unregister(chip);
+
+ if (tpm_dev.iotype == TPM_INF_IO_PORT) {
+ release_region(tpm_dev.data_regs, tpm_dev.data_size);
+ release_region(tpm_dev.config_port,
+ tpm_dev.config_size);
+ } else {
+ iounmap(tpm_dev.mem_base);
+ release_mem_region(tpm_dev.map_base, tpm_dev.map_size);
}
}
diff --git a/drivers/char/tpm/tpm_nsc.c b/drivers/char/tpm/tpm_nsc.c
index 3179ec9..00c5470 100644
--- a/drivers/char/tpm/tpm_nsc.c
+++ b/drivers/char/tpm/tpm_nsc.c
@@ -247,10 +247,9 @@ static struct platform_device *pdev = NULL;
static void tpm_nsc_remove(struct device *dev)
{
struct tpm_chip *chip = dev_get_drvdata(dev);
- if ( chip ) {
- release_region(chip->vendor.base, 2);
- tpm_remove_hardware(chip->dev);
- }
+
+ tpm_chip_unregister(chip);
+ release_region(chip->vendor.base, 2);
}
static SIMPLE_DEV_PM_OPS(tpm_nsc_pm, tpm_pm_suspend, tpm_pm_resume);
@@ -308,11 +307,16 @@ static int __init init_nsc(void)
goto err_del_dev;
}
- if (!(chip = tpm_register_hardware(&pdev->dev, &tpm_nsc))) {
+ chip = tpmm_chip_alloc(&pdev->dev, &tpm_nsc);
+ if (IS_ERR(chip)) {
rc = -ENODEV;
goto err_rel_reg;
}
+ rc = tpm_chip_register(chip);
+ if (rc)
+ goto err_rel_reg;
+
dev_dbg(&pdev->dev, "NSC TPM detected\n");
dev_dbg(&pdev->dev,
"NSC LDN 0x%x, SID 0x%x, SRID 0x%x\n",
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index 51350cd..4cf2ea2 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -79,9 +79,6 @@ struct priv_data {
bool irq_tested;
};
-static LIST_HEAD(tis_chips);
-static DEFINE_MUTEX(tis_lock);
-
#if defined(CONFIG_PNP) && defined(CONFIG_ACPI)
static int is_itpm(struct pnp_dev *dev)
{
@@ -572,6 +569,17 @@ static bool interrupts = true;
module_param(interrupts, bool, 0444);
MODULE_PARM_DESC(interrupts, "Enable interrupts");
+static void tpm_tis_remove(struct tpm_chip *chip)
+{
+ iowrite32(~TPM_GLOBAL_INT_ENABLE &
+ ioread32(chip->vendor.iobase +
+ TPM_INT_ENABLE(chip->vendor.
+ locality)),
+ chip->vendor.iobase +
+ TPM_INT_ENABLE(chip->vendor.locality));
+ release_locality(chip, chip->vendor.locality, 1);
+}
+
static int tpm_tis_init(struct device *dev, resource_size_t start,
resource_size_t len, unsigned int irq)
{
@@ -583,15 +591,16 @@ static int tpm_tis_init(struct device *dev, resource_size_t start,
priv = devm_kzalloc(dev, sizeof(struct priv_data), GFP_KERNEL);
if (priv == NULL)
return -ENOMEM;
- if (!(chip = tpm_register_hardware(dev, &tpm_tis)))
- return -ENODEV;
+
+ chip = tpmm_chip_alloc(dev, &tpm_tis);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
+
chip->vendor.priv = priv;
- chip->vendor.iobase = ioremap(start, len);
- if (!chip->vendor.iobase) {
- rc = -EIO;
- goto out_err;
- }
+ chip->vendor.iobase = devm_ioremap(dev, start, len);
+ if (!chip->vendor.iobase)
+ return -EIO;
/* Default timeouts */
chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
@@ -685,8 +694,8 @@ static int tpm_tis_init(struct device *dev, resource_size_t start,
for (i = irq_s; i <= irq_e && chip->vendor.irq == 0; i++) {
iowrite8(i, chip->vendor.iobase +
TPM_INT_VECTOR(chip->vendor.locality));
- if (request_irq
- (i, tis_int_probe, IRQF_SHARED,
+ if (devm_request_irq
+ (dev, i, tis_int_probe, IRQF_SHARED,
chip->vendor.miscdev.name, chip) != 0) {
dev_info(chip->dev,
"Unable to request irq: %d for probe\n",
@@ -726,15 +735,14 @@ static int tpm_tis_init(struct device *dev, resource_size_t start,
iowrite32(intmask,
chip->vendor.iobase +
TPM_INT_ENABLE(chip->vendor.locality));
- free_irq(i, chip);
}
}
if (chip->vendor.irq) {
iowrite8(chip->vendor.irq,
chip->vendor.iobase +
TPM_INT_VECTOR(chip->vendor.locality));
- if (request_irq
- (chip->vendor.irq, tis_int_handler, IRQF_SHARED,
+ if (devm_request_irq
+ (dev, chip->vendor.irq, tis_int_handler, IRQF_SHARED,
chip->vendor.miscdev.name, chip) != 0) {
dev_info(chip->dev,
"Unable to request irq: %d for use\n",
@@ -767,17 +775,9 @@ static int tpm_tis_init(struct device *dev, resource_size_t start,
goto out_err;
}
- INIT_LIST_HEAD(&chip->vendor.list);
- mutex_lock(&tis_lock);
- list_add(&chip->vendor.list, &tis_chips);
- mutex_unlock(&tis_lock);
-
-
- return 0;
+ return tpm_chip_register(chip);
out_err:
- if (chip->vendor.iobase)
- iounmap(chip->vendor.iobase);
- tpm_remove_hardware(chip->dev);
+ tpm_tis_remove(chip);
return rc;
}
@@ -859,13 +859,10 @@ MODULE_DEVICE_TABLE(pnp, tpm_pnp_tbl);
static void tpm_tis_pnp_remove(struct pnp_dev *dev)
{
struct tpm_chip *chip = pnp_get_drvdata(dev);
-
- tpm_dev_vendor_release(chip);
-
- kfree(chip);
+ tpm_chip_unregister(chip);
+ tpm_tis_remove(chip);
}
-
static struct pnp_driver tis_pnp_driver = {
.name = "tpm_tis",
.id_table = tpm_pnp_tbl,
@@ -884,7 +881,7 @@ MODULE_PARM_DESC(hid, "Set additional specific HID for this driver to probe");
static struct platform_driver tis_drv = {
.driver = {
- .name = "tpm_tis",
+ .name = "tpm_tis",
.owner = THIS_MODULE,
.pm = &tpm_tis_pm,
},
@@ -924,31 +921,16 @@ err_dev:
static void __exit cleanup_tis(void)
{
- struct tpm_vendor_specific *i, *j;
struct tpm_chip *chip;
- mutex_lock(&tis_lock);
- list_for_each_entry_safe(i, j, &tis_chips, list) {
- chip = to_tpm_chip(i);
- tpm_remove_hardware(chip->dev);
- iowrite32(~TPM_GLOBAL_INT_ENABLE &
- ioread32(chip->vendor.iobase +
- TPM_INT_ENABLE(chip->vendor.
- locality)),
- chip->vendor.iobase +
- TPM_INT_ENABLE(chip->vendor.locality));
- release_locality(chip, chip->vendor.locality, 1);
- if (chip->vendor.irq)
- free_irq(chip->vendor.irq, chip);
- iounmap(i->iobase);
- list_del(&i->list);
- }
- mutex_unlock(&tis_lock);
#ifdef CONFIG_PNP
if (!force) {
pnp_unregister_driver(&tis_pnp_driver);
return;
}
#endif
+ chip = dev_get_drvdata(&pdev->dev);
+ tpm_chip_unregister(chip);
+ tpm_tis_remove(chip);
platform_device_unregister(pdev);
platform_driver_unregister(&tis_drv);
}
diff --git a/drivers/char/tpm/xen-tpmfront.c b/drivers/char/tpm/xen-tpmfront.c
index 2064b45..ce01db3 100644
--- a/drivers/char/tpm/xen-tpmfront.c
+++ b/drivers/char/tpm/xen-tpmfront.c
@@ -175,9 +175,9 @@ static int setup_chip(struct device *dev, struct tpm_private *priv)
{
struct tpm_chip *chip;
- chip = tpm_register_hardware(dev, &tpm_vtpm);
- if (!chip)
- return -ENODEV;
+ chip = tpmm_chip_alloc(dev, &tpm_vtpm);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
init_waitqueue_head(&chip->vendor.read_queue);
@@ -286,6 +286,7 @@ static int tpmfront_probe(struct xenbus_device *dev,
const struct xenbus_device_id *id)
{
struct tpm_private *priv;
+ struct tpm_chip *chip;
int rv;
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
@@ -302,21 +303,22 @@ static int tpmfront_probe(struct xenbus_device *dev,
rv = setup_ring(dev, priv);
if (rv) {
- tpm_remove_hardware(&dev->dev);
+ chip = dev_get_drvdata(&dev->dev);
+ tpm_chip_unregister(chip);
ring_free(priv);
return rv;
}
tpm_get_timeouts(priv->chip);
- return rv;
+ return tpm_chip_register(priv->chip);
}
static int tpmfront_remove(struct xenbus_device *dev)
{
struct tpm_chip *chip = dev_get_drvdata(&dev->dev);
struct tpm_private *priv = TPM_VPRIV(chip);
- tpm_remove_hardware(&dev->dev);
+ tpm_chip_unregister(chip);
ring_free(priv);
TPM_VPRIV(chip) = NULL;
return 0;
--
2.1.0
Rename chip->dev to chip->pdev to make it explicit that this not the
character device but actually represents the platform device.
Signed-off-by: Jarkko Sakkinen <[email protected]>
Reviewed-by: Jasob Gunthorpe <[email protected]>
Reviewed-by: Stephan Berger <[email protected]>
---
drivers/char/tpm/tpm-chip.c | 4 ++--
drivers/char/tpm/tpm-dev.c | 10 +++++-----
drivers/char/tpm/tpm-interface.c | 29 +++++++++++++++--------------
drivers/char/tpm/tpm-sysfs.c | 6 +++---
drivers/char/tpm/tpm.h | 4 ++--
drivers/char/tpm/tpm_atmel.c | 14 +++++++-------
drivers/char/tpm/tpm_i2c_atmel.c | 16 ++++++++--------
drivers/char/tpm/tpm_i2c_infineon.c | 6 +++---
drivers/char/tpm/tpm_i2c_nuvoton.c | 22 +++++++++++-----------
drivers/char/tpm/tpm_i2c_stm_st33.c | 18 +++++++++---------
drivers/char/tpm/tpm_infineon.c | 22 +++++++++++-----------
drivers/char/tpm/tpm_nsc.c | 20 ++++++++++----------
drivers/char/tpm/tpm_ppi.c | 4 ++--
drivers/char/tpm/tpm_tis.c | 14 +++++++-------
14 files changed, 95 insertions(+), 94 deletions(-)
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
index 64102de..e72b042 100644
--- a/drivers/char/tpm/tpm-chip.c
+++ b/drivers/char/tpm/tpm-chip.c
@@ -45,7 +45,7 @@ struct tpm_chip *tpm_chip_find_get(int chip_num)
if (chip_num != TPM_ANY_NUM && chip_num != pos->dev_num)
continue;
- if (try_module_get(pos->dev->driver->owner)) {
+ if (try_module_get(pos->pdev->driver->owner)) {
chip = pos;
break;
}
@@ -110,7 +110,7 @@ struct tpm_chip *tpmm_chip_alloc(struct device *dev,
scnprintf(chip->devname, sizeof(chip->devname), "tpm%d", chip->dev_num);
- chip->dev = dev;
+ chip->pdev = dev;
devm_add_action(dev, tpmm_chip_remove, chip);
dev_set_drvdata(dev, chip);
diff --git a/drivers/char/tpm/tpm-dev.c b/drivers/char/tpm/tpm-dev.c
index d9b774e..3568321 100644
--- a/drivers/char/tpm/tpm-dev.c
+++ b/drivers/char/tpm/tpm-dev.c
@@ -63,7 +63,7 @@ static int tpm_open(struct inode *inode, struct file *file)
* by the check of is_open variable, which is protected
* by driver_lock. */
if (test_and_set_bit(0, &chip->is_open)) {
- dev_dbg(chip->dev, "Another process owns this TPM\n");
+ dev_dbg(chip->pdev, "Another process owns this TPM\n");
return -EBUSY;
}
@@ -81,7 +81,7 @@ static int tpm_open(struct inode *inode, struct file *file)
INIT_WORK(&priv->work, timeout_work);
file->private_data = priv;
- get_device(chip->dev);
+ get_device(chip->pdev);
return 0;
}
@@ -168,7 +168,7 @@ static int tpm_release(struct inode *inode, struct file *file)
file->private_data = NULL;
atomic_set(&priv->data_pending, 0);
clear_bit(0, &priv->chip->is_open);
- put_device(priv->chip->dev);
+ put_device(priv->chip->pdev);
kfree(priv);
return 0;
}
@@ -193,12 +193,12 @@ int tpm_dev_add_device(struct tpm_chip *chip)
chip->vendor.miscdev.minor = MISC_DYNAMIC_MINOR;
chip->vendor.miscdev.name = chip->devname;
- chip->vendor.miscdev.parent = chip->dev;
+ chip->vendor.miscdev.parent = chip->pdev;
rc = misc_register(&chip->vendor.miscdev);
if (rc) {
chip->vendor.miscdev.name = NULL;
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"unable to misc_register %s, minor %d err=%d\n",
chip->vendor.miscdev.name,
chip->vendor.miscdev.minor, rc);
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index 4dbed1e..e2af28f 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -343,7 +343,7 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
if (count == 0)
return -ENODATA;
if (count > bufsiz) {
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"invalid count value %x %zx\n", count, bufsiz);
return -E2BIG;
}
@@ -352,7 +352,7 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
rc = chip->ops->send(chip, (u8 *) buf, count);
if (rc < 0) {
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"tpm_transmit: tpm_send: error %zd\n", rc);
goto out;
}
@@ -368,7 +368,7 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
goto out_recv;
if (chip->ops->req_canceled(chip, status)) {
- dev_err(chip->dev, "Operation Canceled\n");
+ dev_err(chip->pdev, "Operation Canceled\n");
rc = -ECANCELED;
goto out;
}
@@ -378,14 +378,14 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
} while (time_before(jiffies, stop));
chip->ops->cancel(chip);
- dev_err(chip->dev, "Operation Timed out\n");
+ dev_err(chip->pdev, "Operation Timed out\n");
rc = -ETIME;
goto out;
out_recv:
rc = chip->ops->recv(chip, (u8 *) buf, bufsiz);
if (rc < 0)
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"tpm_transmit: tpm_recv: error %zd\n", rc);
out:
mutex_unlock(&chip->tpm_mutex);
@@ -411,7 +411,8 @@ ssize_t tpm_transmit_cmd(struct tpm_chip *chip, void *cmd,
err = be32_to_cpu(header->return_code);
if (err != 0 && desc)
- dev_err(chip->dev, "A TPM error (%d) occurred %s\n", err, desc);
+ dev_err(chip->pdev, "A TPM error (%d) occurred %s\n", err,
+ desc);
return err;
}
@@ -505,7 +506,7 @@ int tpm_get_timeouts(struct tpm_chip *chip)
if (rc == TPM_ERR_INVALID_POSTINIT) {
/* The TPM is not started, we are the first to talk to it.
Execute a startup command. */
- dev_info(chip->dev, "Issuing TPM_STARTUP");
+ dev_info(chip->pdev, "Issuing TPM_STARTUP");
if (tpm_startup(chip, TPM_ST_CLEAR))
return rc;
@@ -517,7 +518,7 @@ int tpm_get_timeouts(struct tpm_chip *chip)
NULL);
}
if (rc) {
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"A TPM error (%zd) occurred attempting to determine the timeouts\n",
rc);
goto duration;
@@ -556,7 +557,7 @@ int tpm_get_timeouts(struct tpm_chip *chip)
/* Report adjusted timeouts */
if (chip->vendor.timeout_adjusted) {
- dev_info(chip->dev,
+ dev_info(chip->pdev,
HW_ERR "Adjusting reported timeouts: A %lu->%luus B %lu->%luus C %lu->%luus D %lu->%luus\n",
old_timeout[0], new_timeout[0],
old_timeout[1], new_timeout[1],
@@ -603,7 +604,7 @@ duration:
chip->vendor.duration[TPM_MEDIUM] *= 1000;
chip->vendor.duration[TPM_LONG] *= 1000;
chip->vendor.duration_adjusted = true;
- dev_info(chip->dev, "Adjusting TPM timeout parameters.");
+ dev_info(chip->pdev, "Adjusting TPM timeout parameters.");
}
return 0;
}
@@ -760,7 +761,7 @@ int tpm_do_selftest(struct tpm_chip *chip)
* around 300ms while the self test is ongoing, keep trying
* until the self test duration expires. */
if (rc == -ETIME) {
- dev_info(chip->dev, HW_ERR "TPM command timed out during continue self test");
+ dev_info(chip->pdev, HW_ERR "TPM command timed out during continue self test");
msleep(delay_msec);
continue;
}
@@ -770,7 +771,7 @@ int tpm_do_selftest(struct tpm_chip *chip)
rc = be32_to_cpu(cmd.header.out.return_code);
if (rc == TPM_ERR_DISABLED || rc == TPM_ERR_DEACTIVATED) {
- dev_info(chip->dev,
+ dev_info(chip->pdev,
"TPM is disabled/deactivated (0x%X)\n", rc);
/* TPM is disabled and/or deactivated; driver can
* proceed and TPM does handle commands for
@@ -918,10 +919,10 @@ int tpm_pm_suspend(struct device *dev)
}
if (rc)
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"Error (%d) sending savestate before suspend\n", rc);
else if (try > 0)
- dev_warn(chip->dev, "TPM savestate took %dms\n",
+ dev_warn(chip->pdev, "TPM savestate took %dms\n",
try * TPM_TIMEOUT_RETRY);
return rc;
diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c
index 8ecb052..ee66fd4 100644
--- a/drivers/char/tpm/tpm-sysfs.c
+++ b/drivers/char/tpm/tpm-sysfs.c
@@ -284,16 +284,16 @@ static const struct attribute_group tpm_dev_group = {
int tpm_sysfs_add_device(struct tpm_chip *chip)
{
int err;
- err = sysfs_create_group(&chip->dev->kobj,
+ err = sysfs_create_group(&chip->pdev->kobj,
&tpm_dev_group);
if (err)
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"failed to create sysfs attributes, %d\n", err);
return err;
}
void tpm_sysfs_del_device(struct tpm_chip *chip)
{
- sysfs_remove_group(&chip->dev->kobj, &tpm_dev_group);
+ sysfs_remove_group(&chip->pdev->kobj, &tpm_dev_group);
}
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 3409acf..adf6af8 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -103,7 +103,7 @@ enum tpm_chip_flags {
};
struct tpm_chip {
- struct device *dev; /* Device stuff */
+ struct device *pdev; /* Device stuff */
const struct tpm_class_ops *ops;
unsigned int flags;
@@ -130,7 +130,7 @@ struct tpm_chip {
static inline void tpm_chip_put(struct tpm_chip *chip)
{
- module_put(chip->dev->driver->owner);
+ module_put(chip->pdev->driver->owner);
}
static inline int tpm_read_index(int base, int index)
diff --git a/drivers/char/tpm/tpm_atmel.c b/drivers/char/tpm/tpm_atmel.c
index 8e2576a..8a52ebe 100644
--- a/drivers/char/tpm/tpm_atmel.c
+++ b/drivers/char/tpm/tpm_atmel.c
@@ -49,7 +49,7 @@ static int tpm_atml_recv(struct tpm_chip *chip, u8 *buf, size_t count)
for (i = 0; i < 6; i++) {
status = ioread8(chip->vendor.iobase + 1);
if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
- dev_err(chip->dev, "error reading header\n");
+ dev_err(chip->pdev, "error reading header\n");
return -EIO;
}
*buf++ = ioread8(chip->vendor.iobase);
@@ -60,12 +60,12 @@ static int tpm_atml_recv(struct tpm_chip *chip, u8 *buf, size_t count)
size = be32_to_cpu(*native_size);
if (count < size) {
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"Recv size(%d) less than available space\n", size);
for (; i < size; i++) { /* clear the waiting data anyway */
status = ioread8(chip->vendor.iobase + 1);
if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
- dev_err(chip->dev, "error reading data\n");
+ dev_err(chip->pdev, "error reading data\n");
return -EIO;
}
}
@@ -76,7 +76,7 @@ static int tpm_atml_recv(struct tpm_chip *chip, u8 *buf, size_t count)
for (; i < size; i++) {
status = ioread8(chip->vendor.iobase + 1);
if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
- dev_err(chip->dev, "error reading data\n");
+ dev_err(chip->pdev, "error reading data\n");
return -EIO;
}
*buf++ = ioread8(chip->vendor.iobase);
@@ -86,7 +86,7 @@ static int tpm_atml_recv(struct tpm_chip *chip, u8 *buf, size_t count)
status = ioread8(chip->vendor.iobase + 1);
if (status & ATML_STATUS_DATA_AVAIL) {
- dev_err(chip->dev, "data available is stuck\n");
+ dev_err(chip->pdev, "data available is stuck\n");
return -EIO;
}
@@ -97,9 +97,9 @@ static int tpm_atml_send(struct tpm_chip *chip, u8 *buf, size_t count)
{
int i;
- dev_dbg(chip->dev, "tpm_atml_send:\n");
+ dev_dbg(chip->pdev, "tpm_atml_send:\n");
for (i = 0; i < count; i++) {
- dev_dbg(chip->dev, "%d 0x%x(%d)\n", i, buf[i], buf[i]);
+ dev_dbg(chip->pdev, "%d 0x%x(%d)\n", i, buf[i], buf[i]);
iowrite8(buf[i], chip->vendor.iobase);
}
diff --git a/drivers/char/tpm/tpm_i2c_atmel.c b/drivers/char/tpm/tpm_i2c_atmel.c
index 643a940..7a0ca78 100644
--- a/drivers/char/tpm/tpm_i2c_atmel.c
+++ b/drivers/char/tpm/tpm_i2c_atmel.c
@@ -52,7 +52,7 @@ struct priv_data {
static int i2c_atmel_send(struct tpm_chip *chip, u8 *buf, size_t len)
{
struct priv_data *priv = chip->vendor.priv;
- struct i2c_client *client = to_i2c_client(chip->dev);
+ struct i2c_client *client = to_i2c_client(chip->pdev);
s32 status;
priv->len = 0;
@@ -62,7 +62,7 @@ static int i2c_atmel_send(struct tpm_chip *chip, u8 *buf, size_t len)
status = i2c_master_send(client, buf, len);
- dev_dbg(chip->dev,
+ dev_dbg(chip->pdev,
"%s(buf=%*ph len=%0zx) -> sts=%d\n", __func__,
(int)min_t(size_t, 64, len), buf, len, status);
return status;
@@ -71,7 +71,7 @@ static int i2c_atmel_send(struct tpm_chip *chip, u8 *buf, size_t len)
static int i2c_atmel_recv(struct tpm_chip *chip, u8 *buf, size_t count)
{
struct priv_data *priv = chip->vendor.priv;
- struct i2c_client *client = to_i2c_client(chip->dev);
+ struct i2c_client *client = to_i2c_client(chip->pdev);
struct tpm_output_header *hdr =
(struct tpm_output_header *)priv->buffer;
u32 expected_len;
@@ -88,7 +88,7 @@ static int i2c_atmel_recv(struct tpm_chip *chip, u8 *buf, size_t count)
return -ENOMEM;
if (priv->len >= expected_len) {
- dev_dbg(chip->dev,
+ dev_dbg(chip->pdev,
"%s early(buf=%*ph count=%0zx) -> ret=%d\n", __func__,
(int)min_t(size_t, 64, expected_len), buf, count,
expected_len);
@@ -97,7 +97,7 @@ static int i2c_atmel_recv(struct tpm_chip *chip, u8 *buf, size_t count)
}
rc = i2c_master_recv(client, buf, expected_len);
- dev_dbg(chip->dev,
+ dev_dbg(chip->pdev,
"%s reread(buf=%*ph count=%0zx) -> ret=%d\n", __func__,
(int)min_t(size_t, 64, expected_len), buf, count,
expected_len);
@@ -106,13 +106,13 @@ static int i2c_atmel_recv(struct tpm_chip *chip, u8 *buf, size_t count)
static void i2c_atmel_cancel(struct tpm_chip *chip)
{
- dev_err(chip->dev, "TPM operation cancellation was requested, but is not supported");
+ dev_err(chip->pdev, "TPM operation cancellation was requested, but is not supported");
}
static u8 i2c_atmel_read_status(struct tpm_chip *chip)
{
struct priv_data *priv = chip->vendor.priv;
- struct i2c_client *client = to_i2c_client(chip->dev);
+ struct i2c_client *client = to_i2c_client(chip->pdev);
int rc;
/* The TPM fails the I2C read until it is ready, so we do the entire
@@ -125,7 +125,7 @@ static u8 i2c_atmel_read_status(struct tpm_chip *chip)
/* Once the TPM has completed the command the command remains readable
* until another command is issued. */
rc = i2c_master_recv(client, priv->buffer, sizeof(priv->buffer));
- dev_dbg(chip->dev,
+ dev_dbg(chip->pdev,
"%s: sts=%d", __func__, rc);
if (rc <= 0)
return 0;
diff --git a/drivers/char/tpm/tpm_i2c_infineon.c b/drivers/char/tpm/tpm_i2c_infineon.c
index 03708e6..33c5f36 100644
--- a/drivers/char/tpm/tpm_i2c_infineon.c
+++ b/drivers/char/tpm/tpm_i2c_infineon.c
@@ -446,7 +446,7 @@ static int tpm_tis_i2c_recv(struct tpm_chip *chip, u8 *buf, size_t count)
/* read first 10 bytes, including tag, paramsize, and result */
size = recv_data(chip, buf, TPM_HEADER_SIZE);
if (size < TPM_HEADER_SIZE) {
- dev_err(chip->dev, "Unable to read header\n");
+ dev_err(chip->pdev, "Unable to read header\n");
goto out;
}
@@ -459,14 +459,14 @@ static int tpm_tis_i2c_recv(struct tpm_chip *chip, u8 *buf, size_t count)
size += recv_data(chip, &buf[TPM_HEADER_SIZE],
expected - TPM_HEADER_SIZE);
if (size < expected) {
- dev_err(chip->dev, "Unable to read remainder of result\n");
+ dev_err(chip->pdev, "Unable to read remainder of result\n");
size = -ETIME;
goto out;
}
wait_for_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c, &status);
if (status & TPM_STS_DATA_AVAIL) { /* retry? */
- dev_err(chip->dev, "Error left over data\n");
+ dev_err(chip->pdev, "Error left over data\n");
size = -EIO;
goto out;
}
diff --git a/drivers/char/tpm/tpm_i2c_nuvoton.c b/drivers/char/tpm/tpm_i2c_nuvoton.c
index 8c23088..e1eadb0 100644
--- a/drivers/char/tpm/tpm_i2c_nuvoton.c
+++ b/drivers/char/tpm/tpm_i2c_nuvoton.c
@@ -96,13 +96,13 @@ static s32 i2c_nuvoton_write_buf(struct i2c_client *client, u8 offset, u8 size,
/* read TPM_STS register */
static u8 i2c_nuvoton_read_status(struct tpm_chip *chip)
{
- struct i2c_client *client = to_i2c_client(chip->dev);
+ struct i2c_client *client = to_i2c_client(chip->pdev);
s32 status;
u8 data;
status = i2c_nuvoton_read_buf(client, TPM_STS, 1, &data);
if (status <= 0) {
- dev_err(chip->dev, "%s() error return %d\n", __func__,
+ dev_err(chip->pdev, "%s() error return %d\n", __func__,
status);
data = TPM_STS_ERR_VAL;
}
@@ -127,13 +127,13 @@ static s32 i2c_nuvoton_write_status(struct i2c_client *client, u8 data)
/* write commandReady to TPM_STS register */
static void i2c_nuvoton_ready(struct tpm_chip *chip)
{
- struct i2c_client *client = to_i2c_client(chip->dev);
+ struct i2c_client *client = to_i2c_client(chip->pdev);
s32 status;
/* this causes the current command to be aborted */
status = i2c_nuvoton_write_status(client, TPM_STS_COMMAND_READY);
if (status < 0)
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"%s() fail to write TPM_STS.commandReady\n", __func__);
}
@@ -212,7 +212,7 @@ static int i2c_nuvoton_wait_for_stat(struct tpm_chip *chip, u8 mask, u8 value,
return 0;
} while (time_before(jiffies, stop));
}
- dev_err(chip->dev, "%s(%02x, %02x) -> timeout\n", __func__, mask,
+ dev_err(chip->pdev, "%s(%02x, %02x) -> timeout\n", __func__, mask,
value);
return -ETIMEDOUT;
}
@@ -240,7 +240,7 @@ static int i2c_nuvoton_recv_data(struct i2c_client *client,
&chip->vendor.read_queue) == 0) {
burst_count = i2c_nuvoton_get_burstcount(client, chip);
if (burst_count < 0) {
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"%s() fail to read burstCount=%d\n", __func__,
burst_count);
return -EIO;
@@ -249,12 +249,12 @@ static int i2c_nuvoton_recv_data(struct i2c_client *client,
rc = i2c_nuvoton_read_buf(client, TPM_DATA_FIFO_R,
bytes2read, &buf[size]);
if (rc < 0) {
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"%s() fail on i2c_nuvoton_read_buf()=%d\n",
__func__, rc);
return -EIO;
}
- dev_dbg(chip->dev, "%s(%d):", __func__, bytes2read);
+ dev_dbg(chip->pdev, "%s(%d):", __func__, bytes2read);
size += bytes2read;
}
@@ -264,7 +264,7 @@ static int i2c_nuvoton_recv_data(struct i2c_client *client,
/* Read TPM command results */
static int i2c_nuvoton_recv(struct tpm_chip *chip, u8 *buf, size_t count)
{
- struct device *dev = chip->dev;
+ struct device *dev = chip->pdev;
struct i2c_client *client = to_i2c_client(dev);
s32 rc;
int expected, status, burst_count, retries, size = 0;
@@ -334,7 +334,7 @@ static int i2c_nuvoton_recv(struct tpm_chip *chip, u8 *buf, size_t count)
break;
}
i2c_nuvoton_ready(chip);
- dev_dbg(chip->dev, "%s() -> %d\n", __func__, size);
+ dev_dbg(chip->pdev, "%s() -> %d\n", __func__, size);
return size;
}
@@ -347,7 +347,7 @@ static int i2c_nuvoton_recv(struct tpm_chip *chip, u8 *buf, size_t count)
*/
static int i2c_nuvoton_send(struct tpm_chip *chip, u8 *buf, size_t len)
{
- struct device *dev = chip->dev;
+ struct device *dev = chip->pdev;
struct i2c_client *client = to_i2c_client(dev);
u32 ordinal;
size_t count = 0;
diff --git a/drivers/char/tpm/tpm_i2c_stm_st33.c b/drivers/char/tpm/tpm_i2c_stm_st33.c
index 9a96d37..48c4808 100644
--- a/drivers/char/tpm/tpm_i2c_stm_st33.c
+++ b/drivers/char/tpm/tpm_i2c_stm_st33.c
@@ -588,7 +588,7 @@ static int tpm_stm_i2c_recv(struct tpm_chip *chip, unsigned char *buf,
size = recv_data(chip, buf, TPM_HEADER_SIZE);
if (size < TPM_HEADER_SIZE) {
- dev_err(chip->dev, "Unable to read header\n");
+ dev_err(chip->pdev, "Unable to read header\n");
goto out;
}
@@ -601,7 +601,7 @@ static int tpm_stm_i2c_recv(struct tpm_chip *chip, unsigned char *buf,
size += recv_data(chip, &buf[TPM_HEADER_SIZE],
expected - TPM_HEADER_SIZE);
if (size < expected) {
- dev_err(chip->dev, "Unable to read remainder of result\n");
+ dev_err(chip->pdev, "Unable to read remainder of result\n");
size = -ETIME;
goto out;
}
@@ -639,14 +639,14 @@ static int tpm_stm_i2c_of_request_resources(struct tpm_chip *chip)
pp = client->dev.of_node;
if (!pp) {
- dev_err(chip->dev, "No platform data\n");
+ dev_err(chip->pdev, "No platform data\n");
return -ENODEV;
}
/* Get GPIO from device tree */
gpio = of_get_named_gpio(pp, "lpcpd-gpios", 0);
if (gpio < 0) {
- dev_err(chip->dev, "Failed to retrieve lpcpd-gpios from dts.\n");
+ dev_err(chip->pdev, "Failed to retrieve lpcpd-gpios from dts.\n");
tpm_dev->io_lpcpd = -1;
/*
* lpcpd pin is not specified. This is not an issue as
@@ -659,7 +659,7 @@ static int tpm_stm_i2c_of_request_resources(struct tpm_chip *chip)
ret = devm_gpio_request_one(&client->dev, gpio,
GPIOF_OUT_INIT_HIGH, "TPM IO LPCPD");
if (ret) {
- dev_err(chip->dev, "Failed to request lpcpd pin\n");
+ dev_err(chip->pdev, "Failed to request lpcpd pin\n");
return -ENODEV;
}
tpm_dev->io_lpcpd = gpio;
@@ -682,7 +682,7 @@ static int tpm_stm_i2c_request_resources(struct i2c_client *client,
pdata = client->dev.platform_data;
if (!pdata) {
- dev_err(chip->dev, "No platform data\n");
+ dev_err(chip->pdev, "No platform data\n");
return -ENODEV;
}
@@ -694,7 +694,7 @@ static int tpm_stm_i2c_request_resources(struct i2c_client *client,
pdata->io_lpcpd, GPIOF_OUT_INIT_HIGH,
"TPM IO_LPCPD");
if (ret) {
- dev_err(chip->dev, "%s : reset gpio_request failed\n",
+ dev_err(chip->pdev, "%s : reset gpio_request failed\n",
__FILE__);
return ret;
}
@@ -776,7 +776,7 @@ tpm_stm_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
IRQF_TRIGGER_HIGH,
"TPM SERIRQ management", chip);
if (ret < 0) {
- dev_err(chip->dev , "TPM SERIRQ signals %d not available\n",
+ dev_err(chip->pdev , "TPM SERIRQ signals %d not available\n",
client->irq);
goto _tpm_clean_answer;
}
@@ -807,7 +807,7 @@ tpm_stm_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
return tpm_chip_register(chip);
_tpm_clean_answer:
- dev_info(chip->dev, "TPM I2C initialisation fail\n");
+ dev_info(chip->pdev, "TPM I2C initialisation fail\n");
return ret;
}
diff --git a/drivers/char/tpm/tpm_infineon.c b/drivers/char/tpm/tpm_infineon.c
index dcdb671..6d49213 100644
--- a/drivers/char/tpm/tpm_infineon.c
+++ b/drivers/char/tpm/tpm_infineon.c
@@ -195,9 +195,9 @@ static int wait(struct tpm_chip *chip, int wait_for_bit)
}
if (i == TPM_MAX_TRIES) { /* timeout occurs */
if (wait_for_bit == STAT_XFE)
- dev_err(chip->dev, "Timeout in wait(STAT_XFE)\n");
+ dev_err(chip->pdev, "Timeout in wait(STAT_XFE)\n");
if (wait_for_bit == STAT_RDA)
- dev_err(chip->dev, "Timeout in wait(STAT_RDA)\n");
+ dev_err(chip->pdev, "Timeout in wait(STAT_RDA)\n");
return -EIO;
}
return 0;
@@ -220,7 +220,7 @@ static void wait_and_send(struct tpm_chip *chip, u8 sendbyte)
static void tpm_wtx(struct tpm_chip *chip)
{
number_of_wtx++;
- dev_info(chip->dev, "Granting WTX (%02d / %02d)\n",
+ dev_info(chip->pdev, "Granting WTX (%02d / %02d)\n",
number_of_wtx, TPM_MAX_WTX_PACKAGES);
wait_and_send(chip, TPM_VL_VER);
wait_and_send(chip, TPM_CTRL_WTX);
@@ -231,7 +231,7 @@ static void tpm_wtx(struct tpm_chip *chip)
static void tpm_wtx_abort(struct tpm_chip *chip)
{
- dev_info(chip->dev, "Aborting WTX\n");
+ dev_info(chip->pdev, "Aborting WTX\n");
wait_and_send(chip, TPM_VL_VER);
wait_and_send(chip, TPM_CTRL_WTX_ABORT);
wait_and_send(chip, 0x00);
@@ -257,7 +257,7 @@ recv_begin:
}
if (buf[0] != TPM_VL_VER) {
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"Wrong transport protocol implementation!\n");
return -EIO;
}
@@ -272,7 +272,7 @@ recv_begin:
}
if ((size == 0x6D00) && (buf[1] == 0x80)) {
- dev_err(chip->dev, "Error handling on vendor layer!\n");
+ dev_err(chip->pdev, "Error handling on vendor layer!\n");
return -EIO;
}
@@ -284,7 +284,7 @@ recv_begin:
}
if (buf[1] == TPM_CTRL_WTX) {
- dev_info(chip->dev, "WTX-package received\n");
+ dev_info(chip->pdev, "WTX-package received\n");
if (number_of_wtx < TPM_MAX_WTX_PACKAGES) {
tpm_wtx(chip);
goto recv_begin;
@@ -295,14 +295,14 @@ recv_begin:
}
if (buf[1] == TPM_CTRL_WTX_ABORT_ACK) {
- dev_info(chip->dev, "WTX-abort acknowledged\n");
+ dev_info(chip->pdev, "WTX-abort acknowledged\n");
return size;
}
if (buf[1] == TPM_CTRL_ERROR) {
- dev_err(chip->dev, "ERROR-package received:\n");
+ dev_err(chip->pdev, "ERROR-package received:\n");
if (buf[4] == TPM_INF_NAK)
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"-> Negative acknowledgement"
" - retransmit command!\n");
return -EIO;
@@ -321,7 +321,7 @@ static int tpm_inf_send(struct tpm_chip *chip, u8 * buf, size_t count)
ret = empty_fifo(chip, 1);
if (ret) {
- dev_err(chip->dev, "Timeout while clearing FIFO\n");
+ dev_err(chip->pdev, "Timeout while clearing FIFO\n");
return -EIO;
}
diff --git a/drivers/char/tpm/tpm_nsc.c b/drivers/char/tpm/tpm_nsc.c
index 00c5470..072c298 100644
--- a/drivers/char/tpm/tpm_nsc.c
+++ b/drivers/char/tpm/tpm_nsc.c
@@ -113,7 +113,7 @@ static int nsc_wait_for_ready(struct tpm_chip *chip)
}
while (time_before(jiffies, stop));
- dev_info(chip->dev, "wait for ready failed\n");
+ dev_info(chip->pdev, "wait for ready failed\n");
return -EBUSY;
}
@@ -129,12 +129,12 @@ static int tpm_nsc_recv(struct tpm_chip *chip, u8 * buf, size_t count)
return -EIO;
if (wait_for_stat(chip, NSC_STATUS_F0, NSC_STATUS_F0, &data) < 0) {
- dev_err(chip->dev, "F0 timeout\n");
+ dev_err(chip->pdev, "F0 timeout\n");
return -EIO;
}
if ((data =
inb(chip->vendor.base + NSC_DATA)) != NSC_COMMAND_NORMAL) {
- dev_err(chip->dev, "not in normal mode (0x%x)\n",
+ dev_err(chip->pdev, "not in normal mode (0x%x)\n",
data);
return -EIO;
}
@@ -143,7 +143,7 @@ static int tpm_nsc_recv(struct tpm_chip *chip, u8 * buf, size_t count)
for (p = buffer; p < &buffer[count]; p++) {
if (wait_for_stat
(chip, NSC_STATUS_OBF, NSC_STATUS_OBF, &data) < 0) {
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"OBF timeout (while reading data)\n");
return -EIO;
}
@@ -154,11 +154,11 @@ static int tpm_nsc_recv(struct tpm_chip *chip, u8 * buf, size_t count)
if ((data & NSC_STATUS_F0) == 0 &&
(wait_for_stat(chip, NSC_STATUS_F0, NSC_STATUS_F0, &data) < 0)) {
- dev_err(chip->dev, "F0 not set\n");
+ dev_err(chip->pdev, "F0 not set\n");
return -EIO;
}
if ((data = inb(chip->vendor.base + NSC_DATA)) != NSC_COMMAND_EOC) {
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"expected end of command(0x%x)\n", data);
return -EIO;
}
@@ -189,19 +189,19 @@ static int tpm_nsc_send(struct tpm_chip *chip, u8 * buf, size_t count)
return -EIO;
if (wait_for_stat(chip, NSC_STATUS_IBF, 0, &data) < 0) {
- dev_err(chip->dev, "IBF timeout\n");
+ dev_err(chip->pdev, "IBF timeout\n");
return -EIO;
}
outb(NSC_COMMAND_NORMAL, chip->vendor.base + NSC_COMMAND);
if (wait_for_stat(chip, NSC_STATUS_IBR, NSC_STATUS_IBR, &data) < 0) {
- dev_err(chip->dev, "IBR timeout\n");
+ dev_err(chip->pdev, "IBR timeout\n");
return -EIO;
}
for (i = 0; i < count; i++) {
if (wait_for_stat(chip, NSC_STATUS_IBF, 0, &data) < 0) {
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"IBF timeout (while writing data)\n");
return -EIO;
}
@@ -209,7 +209,7 @@ static int tpm_nsc_send(struct tpm_chip *chip, u8 * buf, size_t count)
}
if (wait_for_stat(chip, NSC_STATUS_IBF, 0, &data) < 0) {
- dev_err(chip->dev, "IBF timeout\n");
+ dev_err(chip->pdev, "IBF timeout\n");
return -EIO;
}
outb(NSC_COMMAND_EOC, chip->vendor.base + NSC_COMMAND);
diff --git a/drivers/char/tpm/tpm_ppi.c b/drivers/char/tpm/tpm_ppi.c
index af48c56..6ca9b5d 100644
--- a/drivers/char/tpm/tpm_ppi.c
+++ b/drivers/char/tpm/tpm_ppi.c
@@ -356,7 +356,7 @@ int tpm_add_ppi(struct tpm_chip *chip)
ACPI_FREE(obj);
}
- rc = sysfs_create_group(&chip->dev->kobj, &ppi_attr_grp);
+ rc = sysfs_create_group(&chip->pdev->kobj, &ppi_attr_grp);
if (!rc)
chip->flags |= TPM_CHIP_FLAG_PPI;
@@ -367,5 +367,5 @@ int tpm_add_ppi(struct tpm_chip *chip)
void tpm_remove_ppi(struct tpm_chip *chip)
{
if (chip->flags & TPM_CHIP_FLAG_PPI)
- sysfs_remove_group(&chip->dev->kobj, &ppi_attr_grp);
+ sysfs_remove_group(&chip->pdev->kobj, &ppi_attr_grp);
}
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index e4a3b9c..6b15545 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -242,7 +242,7 @@ static int tpm_tis_recv(struct tpm_chip *chip, u8 *buf, size_t count)
/* read first 10 bytes, including tag, paramsize, and result */
if ((size =
recv_data(chip, buf, TPM_HEADER_SIZE)) < TPM_HEADER_SIZE) {
- dev_err(chip->dev, "Unable to read header\n");
+ dev_err(chip->pdev, "Unable to read header\n");
goto out;
}
@@ -255,7 +255,7 @@ static int tpm_tis_recv(struct tpm_chip *chip, u8 *buf, size_t count)
if ((size +=
recv_data(chip, &buf[TPM_HEADER_SIZE],
expected - TPM_HEADER_SIZE)) < expected) {
- dev_err(chip->dev, "Unable to read remainder of result\n");
+ dev_err(chip->pdev, "Unable to read remainder of result\n");
size = -ETIME;
goto out;
}
@@ -264,7 +264,7 @@ static int tpm_tis_recv(struct tpm_chip *chip, u8 *buf, size_t count)
&chip->vendor.int_queue, false);
status = tpm_tis_status(chip);
if (status & TPM_STS_DATA_AVAIL) { /* retry? */
- dev_err(chip->dev, "Error left over data\n");
+ dev_err(chip->pdev, "Error left over data\n");
size = -EIO;
goto out;
}
@@ -406,7 +406,7 @@ static int tpm_tis_send(struct tpm_chip *chip, u8 *buf, size_t len)
msleep(1);
if (!priv->irq_tested) {
disable_interrupts(chip);
- dev_err(chip->dev,
+ dev_err(chip->pdev,
FW_BUG "TPM interrupt not working, polling instead\n");
}
priv->irq_tested = true;
@@ -476,7 +476,7 @@ static int probe_itpm(struct tpm_chip *chip)
rc = tpm_tis_send_data(chip, cmd_getticks, len);
if (rc == 0) {
- dev_info(chip->dev, "Detected an iTPM.\n");
+ dev_info(chip->pdev, "Detected an iTPM.\n");
rc = 1;
} else
rc = -EFAULT;
@@ -699,7 +699,7 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
if (devm_request_irq
(dev, i, tis_int_probe, IRQF_SHARED,
chip->vendor.miscdev.name, chip) != 0) {
- dev_info(chip->dev,
+ dev_info(chip->pdev,
"Unable to request irq: %d for probe\n",
i);
continue;
@@ -746,7 +746,7 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
if (devm_request_irq
(dev, chip->vendor.irq, tis_int_handler, IRQF_SHARED,
chip->vendor.miscdev.name, chip) != 0) {
- dev_info(chip->dev,
+ dev_info(chip->pdev,
"Unable to request irq: %d for use\n",
chip->vendor.irq);
chip->vendor.irq = 0;
--
2.1.0
On Fri, 12 Dec 2014, Jarkko Sakkinen wrote:
> This patch set enables TPM2 protocol and provides drivers for FIFO and
> CRB interfaces. This patch set does not export any sysfs attributes for
> TPM 2.0 because existing sysfs attributes have three non-trivial issues:
>
> - They are associated with the platform device instead of character
> device.
> - They are are not trivial key-value pairs but contain text that is
> not easily parsed by a computer.
> - Raciness as described in
> http://kroah.com/log/blog/2013/06/26/how-to-create-a-sysfs-file-correctly/
>
> v2:
> - Improved struct tpm_chip life-cycle by taking advantage of devres
> API.
> - Refined sysfs attributes as simple key-values thereby not repeating
> mistakes in TPM1 sysfs attributes.
> - Documented functions in tpm-chip.c and tpm2-cmd.c.
> - Documented sysfs attributes.
>
> v3:
> - Lots of fixes in calling order in device drivers (thanks to Jason
> Gunthorpe for pointing these out!).
> - Attach sysfs attributes to the misc device because it represents
> TPM device to the user space.
>
> v4:
> - Disable sysfs attibutes for TPM 2.0 for until we can sort out the
> best approach for them.
> - Fixed all the style issues found with checkpatch.pl.
>
> v5:
> - missing EXPORT_SYMBOL_GPL()
> - own class for TPM devices used for TPM 2.0 devices and onwards.
>
> v6:
> - Non-racy initialization for sysfs attributes using struct device's
> groups field.
> - The class 'tpm' is used now for all TPM devices. For the first device
> node major MISC_MAJOR and minor TPM_MINOR is used in order to retain
> backwards compatability.
>
> v7:
> - Release device number and free struct tpm_chip memory inside
> tpm_dev_release callback.
> - Moved code from tpm-interface.c and tpm_dev.c to tpm-chip.c.
>
> v8:
> - Cleaned up unneeded cast from tpm_transmit_cmd().
> - Cleaned up redundant PPI_VERSION_LEN constant from tpm_ppi.c.
> - Fixed tpm_tis to use tpm2_calc_ordinal_duration() for TPM2 devices.
> - tpm_crb: in crb_recv, check that count can hold the TPM header at
> minimum.
> - tpm_crb: add enumerations for bit flags in start and cancel fields
> of the control area.
> - tpm_crb: use ioremap() for command and response buffer because
> they might be anywhere.
> - tpm_crb: use IO access functions for reading ioremapped buffers
> because using direct pointers is not portable.
> - tpm_crb: only apply ACPI start if start method reported by the
> TPM2 ACPI table allows it.
> - In tpm2_pcr_read() just calculate index and bit and get rid of
> hacky loop.
> - Do not add sysfs attributes for TPM 2.0 devices.
>
> v9:
> - Fixed compilation issues in v8 (sorry for not using the correct
> tree).
> - Just do "return tpm_chip_register();" instead of copying return
> value to a variable.
> - Removed unused tpm2_startup().
> - In the CRB driver ACPI TPM2 table could contain platform specific
> and therefore inequality test does not work. Fixed in this patch
> set.
>
> v10:
> - Fixed coccicheck and sparse errors and other reported style errors.
> - Fixed build errors without CONFIG_ACPI.
> - Fixed build error with CONFIG_OF.
> - Added TPM_CHIP_FLAG_REGISTERED to mark successful tpm_chip_register().
> It is checked in the beginning of tpm_chip_unregister(), which is
> called even when "attach" callback for a device fails because "detach"
> callback is always called.
> - Added TPM_CHIP_FLAG_PPI to mark successful PPI interface lookup because
> in older TPM chips version string might be non-existent.
> - Check TPM version from the 4th byte of STS register after requesting
> the locality because otherwise the read will return bogus data.
> - Some TPM chips just give 0xff as the 4th byte so using that for detecting
> TPM family is unstable. Instead I chose the approach of using idempotent
> TPM 2.x command to detect such case.
>
> Jarkko Sakkinen (8):
> tpm: merge duplicate transmit_cmd() functions
> tpm: two-phase chip management functions
> tpm: fix raciness of PPI interface lookup
> tpm: rename chip->dev to chip->pdev
> tpm: device class for tpm
> tpm: TPM 2.0 baseline support
> tpm: TPM 2.0 CRB Interface
> tpm: TPM 2.0 FIFO Interface
>
> Documentation/ABI/stable/sysfs-class-tpm | 22 +-
> drivers/char/tpm/Kconfig | 9 +
> drivers/char/tpm/Makefile | 3 +-
> drivers/char/tpm/tpm-chip.c | 256 +++++++++++++
> drivers/char/tpm/tpm-dev.c | 42 +--
> drivers/char/tpm/tpm-interface.c | 263 +++++--------
> drivers/char/tpm/tpm-sysfs.c | 29 +-
> drivers/char/tpm/tpm.h | 118 +++++-
> drivers/char/tpm/tpm2-cmd.c | 617 +++++++++++++++++++++++++++++++
> drivers/char/tpm/tpm_atmel.c | 25 +-
> drivers/char/tpm/tpm_crb.c | 354 ++++++++++++++++++
> drivers/char/tpm/tpm_i2c_atmel.c | 55 +--
> drivers/char/tpm/tpm_i2c_infineon.c | 43 +--
> drivers/char/tpm/tpm_i2c_nuvoton.c | 71 ++--
> drivers/char/tpm/tpm_i2c_stm_st33.c | 32 +-
> drivers/char/tpm/tpm_ibmvtpm.c | 17 +-
> drivers/char/tpm/tpm_infineon.c | 51 +--
> drivers/char/tpm/tpm_nsc.c | 34 +-
> drivers/char/tpm/tpm_ppi.c | 141 ++++---
> drivers/char/tpm/tpm_tis.c | 224 ++++++-----
> drivers/char/tpm/xen-tpmfront.c | 14 +-
> 21 files changed, 1820 insertions(+), 600 deletions(-)
> create mode 100644 drivers/char/tpm/tpm-chip.c
> create mode 100644 drivers/char/tpm/tpm2-cmd.c
> create mode 100644 drivers/char/tpm/tpm_crb.c
>
> --
> 2.1.0
>
This patchset works on a TPM 1.2 Toshiba CB35-A3120 using either
CONFIG_TCG_TPM=y
CONFIG_TCG_TIS=y
# CONFIG_TCG_TIS_I2C_ATMEL is not set
# CONFIG_TCG_TIS_I2C_INFINEON is not set
# CONFIG_TCG_TIS_I2C_NUVOTON is not set
# CONFIG_TCG_NSC is not set
# CONFIG_TCG_ATMEL is not set
# CONFIG_TCG_INFINEON is not set
# CONFIG_TCG_CRB is not set
or
CONFIG_TCG_TPM=y
CONFIG_TCG_TIS=y
CONFIG_TCG_TIS_I2C_ATMEL=y
CONFIG_TCG_TIS_I2C_INFINEON=y
CONFIG_TCG_TIS_I2C_NUVOTON=y
CONFIG_TCG_NSC=y
CONFIG_TCG_ATMEL=y
CONFIG_TCG_INFINEON=y
CONFIG_TCG_CRB=y
Tested-by: Scot Doyle <[email protected]>
On 12/12/2014 02:46 PM, Jarkko Sakkinen wrote:
> Merged transmit_cmd() functions in tpm-interface.c and tpm-sysfs.c.
> Added "tpm_" prefix for consistency sake. Changed cmd parameter as
> opaque. This enables to use separate command structures for TPM1
> and TPM2 commands in future. Loose coupling works fine here.
>
> Signed-off-by: Jarkko Sakkinen <[email protected]>
> Reviewed-by: Jasob Gunthorpe <[email protected]>
> Reviewed-by: Stephan Berger <[email protected]>
Not quite ... Stefan Berger <[email protected]>
Stefan
On 12/12/2014 02:46 PM, Jarkko Sakkinen wrote:
> Detect TPM 2.0 by sending idempotent TPM 2.x command. Ordinals for
> TPM 2.0 are higher than TPM 1.x commands so this should be fail-safe.
> Using STS3 is unreliable because some chips just report 0xff and not
> what the spec says.
TPM TIS 1.2 can report either 0xff or 0x00 for sts3 since that part of
register was not defined for this version but only for a later version.
So, unless the TIS 1.3 for TPM 2.0 is broken, it should report a bit
_pattern_ (not plain 0x00 or 0xff) that you could apply the suggested
mask to and check then.
Stefan
On Sat, 2014-12-13 at 17:53 +0000, Scot Doyle wrote:
> On Fri, 12 Dec 2014, Jarkko Sakkinen wrote:
>
> > This patch set enables TPM2 protocol and provides drivers for FIFO and
> > CRB interfaces. This patch set does not export any sysfs attributes for
> > TPM 2.0 because existing sysfs attributes have three non-trivial issues:
> >
> > - They are associated with the platform device instead of character
> > device.
> > - They are are not trivial key-value pairs but contain text that is
> > not easily parsed by a computer.
> > - Raciness as described in
> > http://kroah.com/log/blog/2013/06/26/how-to-create-a-sysfs-file-correctly/
> >
> > v2:
> > - Improved struct tpm_chip life-cycle by taking advantage of devres
> > API.
> > - Refined sysfs attributes as simple key-values thereby not repeating
> > mistakes in TPM1 sysfs attributes.
> > - Documented functions in tpm-chip.c and tpm2-cmd.c.
> > - Documented sysfs attributes.
> >
> > v3:
> > - Lots of fixes in calling order in device drivers (thanks to Jason
> > Gunthorpe for pointing these out!).
> > - Attach sysfs attributes to the misc device because it represents
> > TPM device to the user space.
> >
> > v4:
> > - Disable sysfs attibutes for TPM 2.0 for until we can sort out the
> > best approach for them.
> > - Fixed all the style issues found with checkpatch.pl.
> >
> > v5:
> > - missing EXPORT_SYMBOL_GPL()
> > - own class for TPM devices used for TPM 2.0 devices and onwards.
> >
> > v6:
> > - Non-racy initialization for sysfs attributes using struct device's
> > groups field.
> > - The class 'tpm' is used now for all TPM devices. For the first device
> > node major MISC_MAJOR and minor TPM_MINOR is used in order to retain
> > backwards compatability.
> >
> > v7:
> > - Release device number and free struct tpm_chip memory inside
> > tpm_dev_release callback.
> > - Moved code from tpm-interface.c and tpm_dev.c to tpm-chip.c.
> >
> > v8:
> > - Cleaned up unneeded cast from tpm_transmit_cmd().
> > - Cleaned up redundant PPI_VERSION_LEN constant from tpm_ppi.c.
> > - Fixed tpm_tis to use tpm2_calc_ordinal_duration() for TPM2 devices.
> > - tpm_crb: in crb_recv, check that count can hold the TPM header at
> > minimum.
> > - tpm_crb: add enumerations for bit flags in start and cancel fields
> > of the control area.
> > - tpm_crb: use ioremap() for command and response buffer because
> > they might be anywhere.
> > - tpm_crb: use IO access functions for reading ioremapped buffers
> > because using direct pointers is not portable.
> > - tpm_crb: only apply ACPI start if start method reported by the
> > TPM2 ACPI table allows it.
> > - In tpm2_pcr_read() just calculate index and bit and get rid of
> > hacky loop.
> > - Do not add sysfs attributes for TPM 2.0 devices.
> >
> > v9:
> > - Fixed compilation issues in v8 (sorry for not using the correct
> > tree).
> > - Just do "return tpm_chip_register();" instead of copying return
> > value to a variable.
> > - Removed unused tpm2_startup().
> > - In the CRB driver ACPI TPM2 table could contain platform specific
> > and therefore inequality test does not work. Fixed in this patch
> > set.
> >
> > v10:
> > - Fixed coccicheck and sparse errors and other reported style errors.
> > - Fixed build errors without CONFIG_ACPI.
> > - Fixed build error with CONFIG_OF.
> > - Added TPM_CHIP_FLAG_REGISTERED to mark successful tpm_chip_register().
> > It is checked in the beginning of tpm_chip_unregister(), which is
> > called even when "attach" callback for a device fails because "detach"
> > callback is always called.
> > - Added TPM_CHIP_FLAG_PPI to mark successful PPI interface lookup because
> > in older TPM chips version string might be non-existent.
> > - Check TPM version from the 4th byte of STS register after requesting
> > the locality because otherwise the read will return bogus data.
> > - Some TPM chips just give 0xff as the 4th byte so using that for detecting
> > TPM family is unstable. Instead I chose the approach of using idempotent
> > TPM 2.x command to detect such case.
> >
> > Jarkko Sakkinen (8):
> > tpm: merge duplicate transmit_cmd() functions
> > tpm: two-phase chip management functions
> > tpm: fix raciness of PPI interface lookup
> > tpm: rename chip->dev to chip->pdev
> > tpm: device class for tpm
> > tpm: TPM 2.0 baseline support
> > tpm: TPM 2.0 CRB Interface
> > tpm: TPM 2.0 FIFO Interface
> >
> > Documentation/ABI/stable/sysfs-class-tpm | 22 +-
> > drivers/char/tpm/Kconfig | 9 +
> > drivers/char/tpm/Makefile | 3 +-
> > drivers/char/tpm/tpm-chip.c | 256 +++++++++++++
> > drivers/char/tpm/tpm-dev.c | 42 +--
> > drivers/char/tpm/tpm-interface.c | 263 +++++--------
> > drivers/char/tpm/tpm-sysfs.c | 29 +-
> > drivers/char/tpm/tpm.h | 118 +++++-
> > drivers/char/tpm/tpm2-cmd.c | 617 +++++++++++++++++++++++++++++++
> > drivers/char/tpm/tpm_atmel.c | 25 +-
> > drivers/char/tpm/tpm_crb.c | 354 ++++++++++++++++++
> > drivers/char/tpm/tpm_i2c_atmel.c | 55 +--
> > drivers/char/tpm/tpm_i2c_infineon.c | 43 +--
> > drivers/char/tpm/tpm_i2c_nuvoton.c | 71 ++--
> > drivers/char/tpm/tpm_i2c_stm_st33.c | 32 +-
> > drivers/char/tpm/tpm_ibmvtpm.c | 17 +-
> > drivers/char/tpm/tpm_infineon.c | 51 +--
> > drivers/char/tpm/tpm_nsc.c | 34 +-
> > drivers/char/tpm/tpm_ppi.c | 141 ++++---
> > drivers/char/tpm/tpm_tis.c | 224 ++++++-----
> > drivers/char/tpm/xen-tpmfront.c | 14 +-
> > 21 files changed, 1820 insertions(+), 600 deletions(-)
> > create mode 100644 drivers/char/tpm/tpm-chip.c
> > create mode 100644 drivers/char/tpm/tpm2-cmd.c
> > create mode 100644 drivers/char/tpm/tpm_crb.c
> >
> > --
> > 2.1.0
> >
>
> This patchset works on a TPM 1.2 Toshiba CB35-A3120 using either
>
> CONFIG_TCG_TPM=y
> CONFIG_TCG_TIS=y
> # CONFIG_TCG_TIS_I2C_ATMEL is not set
> # CONFIG_TCG_TIS_I2C_INFINEON is not set
> # CONFIG_TCG_TIS_I2C_NUVOTON is not set
> # CONFIG_TCG_NSC is not set
> # CONFIG_TCG_ATMEL is not set
> # CONFIG_TCG_INFINEON is not set
> # CONFIG_TCG_CRB is not set
>
> or
>
> CONFIG_TCG_TPM=y
> CONFIG_TCG_TIS=y
> CONFIG_TCG_TIS_I2C_ATMEL=y
> CONFIG_TCG_TIS_I2C_INFINEON=y
> CONFIG_TCG_TIS_I2C_NUVOTON=y
> CONFIG_TCG_NSC=y
> CONFIG_TCG_ATMEL=y
> CONFIG_TCG_INFINEON=y
> CONFIG_TCG_CRB=y
>
> Tested-by: Scot Doyle <[email protected]>
Thank you so much. I appreciate it. I run it constantly on my T430S.
$ tpm_version
TPM 1.2 Version Info:
Chip Version: 1.2.13.12
Spec Level: 2
Errata Revision: 3
TPM Vendor ID: STM
Vendor Specific data: 50
TPM Version: 01010000
Manufacturer Info: 53544d20
For the detection part between 1.2/2.0 we could probably move eventually
to STS3 (with the workaround proposed by Stefan Berger) but I would wait
until TPM2 FIFO modules are available in the market. That's why I chose
bit uglier and more conservative route...
/Jarkko
On Sun, 2014-12-14 at 09:03 -0500, Stefan Berger wrote:
> On 12/12/2014 02:46 PM, Jarkko Sakkinen wrote:
> > Merged transmit_cmd() functions in tpm-interface.c and tpm-sysfs.c.
> > Added "tpm_" prefix for consistency sake. Changed cmd parameter as
> > opaque. This enables to use separate command structures for TPM1
> > and TPM2 commands in future. Loose coupling works fine here.
> >
> > Signed-off-by: Jarkko Sakkinen <[email protected]>
> > Reviewed-by: Jasob Gunthorpe <[email protected]>
> > Reviewed-by: Stephan Berger <[email protected]>
>
> Not quite ... Stefan Berger <[email protected]>
Oops. Peter, I guess you could fix those or? My apologies.
> Stefan
/Jarkko
On 14. Dezember 2014 15:57:10 MEZ, Jarkko Sakkinen <[email protected]> wrote:
>On Sun, 2014-12-14 at 09:03 -0500, Stefan Berger wrote:
>> On 12/12/2014 02:46 PM, Jarkko Sakkinen wrote:
>> > Merged transmit_cmd() functions in tpm-interface.c and tpm-sysfs.c.
>> > Added "tpm_" prefix for consistency sake. Changed cmd parameter as
>> > opaque. This enables to use separate command structures for TPM1
>> > and TPM2 commands in future. Loose coupling works fine here.
>> >
>> > Signed-off-by: Jarkko Sakkinen <[email protected]>
>> > Reviewed-by: Jasob Gunthorpe <[email protected]>
>> > Reviewed-by: Stephan Berger <[email protected]>
>>
>> Not quite ... Stefan Berger <[email protected]>
>
>Oops. Peter, I guess you could fix those or? My apologies.
>
>> Stefan
>
>/Jarkko
I'll fix this,
No problem.
Peter
--
Sent from my mobile.
On Sun, Dec 14, 2014 at 09:48:26AM -0500, Stefan Berger wrote:
> On 12/12/2014 02:46 PM, Jarkko Sakkinen wrote:
> >Detect TPM 2.0 by sending idempotent TPM 2.x command. Ordinals for
> >TPM 2.0 are higher than TPM 1.x commands so this should be fail-safe.
> >Using STS3 is unreliable because some chips just report 0xff and not
> >what the spec says.
>
> TPM TIS 1.2 can report either 0xff or 0x00 for sts3 since that part of
> register was not defined for this version but only for a later version. So,
> unless the TIS 1.3 for TPM 2.0 is broken, it should report a bit _pattern_
> (not plain 0x00 or 0xff) that you could apply the suggested mask to and
> check then.
I propose this: lets keep the bit ugly but approach for now and when
there are TPM2 FIFOs available in the market move to your workaround.
I think that would be the most reasonable middle road here.
> Stefan
/Jarkko
On Sun, Dec 14, 2014 at 04:31:10PM +0100, [email protected] wrote:
>
>
> On 14. Dezember 2014 15:57:10 MEZ, Jarkko Sakkinen <[email protected]> wrote:
> >On Sun, 2014-12-14 at 09:03 -0500, Stefan Berger wrote:
> >> On 12/12/2014 02:46 PM, Jarkko Sakkinen wrote:
> >> > Merged transmit_cmd() functions in tpm-interface.c and tpm-sysfs.c.
> >> > Added "tpm_" prefix for consistency sake. Changed cmd parameter as
> >> > opaque. This enables to use separate command structures for TPM1
> >> > and TPM2 commands in future. Loose coupling works fine here.
> >> >
> >> > Signed-off-by: Jarkko Sakkinen <[email protected]>
> >> > Reviewed-by: Jasob Gunthorpe <[email protected]>
> >> > Reviewed-by: Stephan Berger <[email protected]>
> >>
> >> Not quite ... Stefan Berger <[email protected]>
> >
> >Oops. Peter, I guess you could fix those or? My apologies.
> >
> >> Stefan
> >
> >/Jarkko
> I'll fix this,
> No problem.
Thank you.
> Peter
/Jarkko
On 12/14/2014 10:40 AM, Jarkko Sakkinen wrote:
> On Sun, Dec 14, 2014 at 09:48:26AM -0500, Stefan Berger wrote:
>> On 12/12/2014 02:46 PM, Jarkko Sakkinen wrote:
>>> Detect TPM 2.0 by sending idempotent TPM 2.x command. Ordinals for
>>> TPM 2.0 are higher than TPM 1.x commands so this should be fail-safe.
>>> Using STS3 is unreliable because some chips just report 0xff and not
>>> what the spec says.
>> TPM TIS 1.2 can report either 0xff or 0x00 for sts3 since that part of
>> register was not defined for this version but only for a later version. So,
>> unless the TIS 1.3 for TPM 2.0 is broken, it should report a bit _pattern_
>> (not plain 0x00 or 0xff) that you could apply the suggested mask to and
>> check then.
> I propose this: lets keep the bit ugly but approach for now and when
> there are TPM2 FIFOs available in the market move to your workaround.
> I think that would be the most reasonable middle road here.
You are now calling tpm2_gen_interrupt and are looking at the rc, which
is the rc from tpm_transmit_cmd, which seems to make sure that the
sending of the command went alright and the reception of the response.
Is this good enough to distinguish between a TPM 2 and a TPM 1.2? If you
send a valid TPM 2 command to a TPM 1.2 this will at least transmit the
data ok, but the TPM will respond with a TPM 1.2 tag in the response.
The way I understand the code, the rc does not include whether the
response packet is a valid TPM 2 response packet and lets you conclude
to a TPM2. I do something similar in upcoming QEMU patches where I send
a valid TPM2 command for probing and if the tag(!) in the response is a
TPM2 tag (0x8001 = TPM_ST_NO_SESSIONS), then it's a TPM 2, otherwise a
TPM 1.2.
Did you test this with a TPM 1.2 ?
Stefan
>
>> Stefan
> /Jarkko
>
On Sun, 14 Dec 2014, Stefan Berger wrote:
> On 12/14/2014 10:40 AM, Jarkko Sakkinen wrote:
> > On Sun, Dec 14, 2014 at 09:48:26AM -0500, Stefan Berger wrote:
> > > On 12/12/2014 02:46 PM, Jarkko Sakkinen wrote:
> > > > Detect TPM 2.0 by sending idempotent TPM 2.x command. Ordinals for
> > > > TPM 2.0 are higher than TPM 1.x commands so this should be fail-safe.
> > > > Using STS3 is unreliable because some chips just report 0xff and not
> > > > what the spec says.
> > > TPM TIS 1.2 can report either 0xff or 0x00 for sts3 since that part of
> > > register was not defined for this version but only for a later version.
> > > So,
> > > unless the TIS 1.3 for TPM 2.0 is broken, it should report a bit _pattern_
> > > (not plain 0x00 or 0xff) that you could apply the suggested mask to and
> > > check then.
> > I propose this: lets keep the bit ugly but approach for now and when
> > there are TPM2 FIFOs available in the market move to your workaround.
> > I think that would be the most reasonable middle road here.
>
> You are now calling tpm2_gen_interrupt and are looking at the rc, which is the
> rc from tpm_transmit_cmd, which seems to make sure that the sending of the
> command went alright and the reception of the response. Is this good enough to
> distinguish between a TPM 2 and a TPM 1.2? If you send a valid TPM 2 command
> to a TPM 1.2 this will at least transmit the data ok, but the TPM will respond
> with a TPM 1.2 tag in the response. The way I understand the code, the rc does
> not include whether the response packet is a valid TPM 2 response packet and
> lets you conclude to a TPM2. I do something similar in upcoming QEMU patches
> where I send a valid TPM2 command for probing and if the tag(!) in the
> response is a TPM2 tag (0x8001 = TPM_ST_NO_SESSIONS), then it's a TPM 2,
> otherwise a TPM 1.2.
>
> Did you test this with a TPM 1.2 ?
>
> Stefan
One system's output, with a dev_info call to show the value of rc:
[ 0.223837] tpm_tis 00:08: tpm2_gen_interrupt(chip, true) -> 0xa
[ 0.223847] tpm_tis 00:08: 1.2 TPM (device-id 0xB, rev-id 16)
[ 0.280468] tpm_tis 00:08: [Firmware Bug]: TPM interrupt not working, polling instead
On 12/14/2014 01:27 PM, Scot Doyle wrote:
> On Sun, 14 Dec 2014, Stefan Berger wrote:
>> On 12/14/2014 10:40 AM, Jarkko Sakkinen wrote:
>>> On Sun, Dec 14, 2014 at 09:48:26AM -0500, Stefan Berger wrote:
>>>> On 12/12/2014 02:46 PM, Jarkko Sakkinen wrote:
>>>>> Detect TPM 2.0 by sending idempotent TPM 2.x command. Ordinals for
>>>>> TPM 2.0 are higher than TPM 1.x commands so this should be fail-safe.
>>>>> Using STS3 is unreliable because some chips just report 0xff and not
>>>>> what the spec says.
>>>> TPM TIS 1.2 can report either 0xff or 0x00 for sts3 since that part of
>>>> register was not defined for this version but only for a later version.
>>>> So,
>>>> unless the TIS 1.3 for TPM 2.0 is broken, it should report a bit _pattern_
>>>> (not plain 0x00 or 0xff) that you could apply the suggested mask to and
>>>> check then.
>>> I propose this: lets keep the bit ugly but approach for now and when
>>> there are TPM2 FIFOs available in the market move to your workaround.
>>> I think that would be the most reasonable middle road here.
>> You are now calling tpm2_gen_interrupt and are looking at the rc, which is the
>> rc from tpm_transmit_cmd, which seems to make sure that the sending of the
>> command went alright and the reception of the response. Is this good enough to
>> distinguish between a TPM 2 and a TPM 1.2? If you send a valid TPM 2 command
>> to a TPM 1.2 this will at least transmit the data ok, but the TPM will respond
>> with a TPM 1.2 tag in the response. The way I understand the code, the rc does
>> not include whether the response packet is a valid TPM 2 response packet and
>> lets you conclude to a TPM2. I do something similar in upcoming QEMU patches
>> where I send a valid TPM2 command for probing and if the tag(!) in the
>> response is a TPM2 tag (0x8001 = TPM_ST_NO_SESSIONS), then it's a TPM 2,
>> otherwise a TPM 1.2.
>>
>> Did you test this with a TPM 1.2 ?
>>
>> Stefan
> One system's output, with a dev_info call to show the value of rc:
> [ 0.223837] tpm_tis 00:08: tpm2_gen_interrupt(chip, true) -> 0xa
> [ 0.223847] tpm_tis 00:08: 1.2 TPM (device-id 0xB, rev-id 16)
> [ 0.280468] tpm_tis 00:08: [Firmware Bug]: TPM interrupt not working, polling instead
>
Ok, good.
[We won't be able to use STS3 if the TIS of Jarkko's TPM2 is broken...]
Stefan
Stefan
On Sun, Dec 14, 2014 at 03:40:05PM -0500, Stefan Berger wrote:
> On 12/14/2014 01:27 PM, Scot Doyle wrote:
> >On Sun, 14 Dec 2014, Stefan Berger wrote:
> >>On 12/14/2014 10:40 AM, Jarkko Sakkinen wrote:
> >>>On Sun, Dec 14, 2014 at 09:48:26AM -0500, Stefan Berger wrote:
> >>>>On 12/12/2014 02:46 PM, Jarkko Sakkinen wrote:
> >>>>>Detect TPM 2.0 by sending idempotent TPM 2.x command. Ordinals for
> >>>>>TPM 2.0 are higher than TPM 1.x commands so this should be fail-safe.
> >>>>>Using STS3 is unreliable because some chips just report 0xff and not
> >>>>>what the spec says.
> >>>>TPM TIS 1.2 can report either 0xff or 0x00 for sts3 since that part of
> >>>>register was not defined for this version but only for a later version.
> >>>>So,
> >>>>unless the TIS 1.3 for TPM 2.0 is broken, it should report a bit _pattern_
> >>>>(not plain 0x00 or 0xff) that you could apply the suggested mask to and
> >>>>check then.
> >>>I propose this: lets keep the bit ugly but approach for now and when
> >>>there are TPM2 FIFOs available in the market move to your workaround.
> >>>I think that would be the most reasonable middle road here.
> >>You are now calling tpm2_gen_interrupt and are looking at the rc, which is the
> >>rc from tpm_transmit_cmd, which seems to make sure that the sending of the
> >>command went alright and the reception of the response. Is this good enough to
> >>distinguish between a TPM 2 and a TPM 1.2? If you send a valid TPM 2 command
> >>to a TPM 1.2 this will at least transmit the data ok, but the TPM will respond
> >>with a TPM 1.2 tag in the response. The way I understand the code, the rc does
> >>not include whether the response packet is a valid TPM 2 response packet and
> >>lets you conclude to a TPM2. I do something similar in upcoming QEMU patches
> >>where I send a valid TPM2 command for probing and if the tag(!) in the
> >>response is a TPM2 tag (0x8001 = TPM_ST_NO_SESSIONS), then it's a TPM 2,
> >>otherwise a TPM 1.2.
> >>
> >>Did you test this with a TPM 1.2 ?
> >>
> >> Stefan
> >One system's output, with a dev_info call to show the value of rc:
> >[ 0.223837] tpm_tis 00:08: tpm2_gen_interrupt(chip, true) -> 0xa
> >[ 0.223847] tpm_tis 00:08: 1.2 TPM (device-id 0xB, rev-id 16)
> >[ 0.280468] tpm_tis 00:08: [Firmware Bug]: TPM interrupt not working, polling instead
> >
>
> Ok, good.
>
> [We won't be able to use STS3 if the TIS of Jarkko's TPM2 is broken...]
Yes, the prototype module that I had to use had the same problem as TPM
1.2 chips.
I think your idea of using tag is much cleaner than using the error
code. I'll probably submit a separate patch for that later on but since
this code is now verified to work on two TPM 1.2 chips (my own and
Scots) and one dTPM2 module, lets keep it that way until this patch
set is pulled at least...
/Jarkko
So, what do you think? Are we now settled with this?
/Jarkko
On Fri, Dec 12, 2014 at 11:46:32AM -0800, Jarkko Sakkinen wrote:
> This patch set enables TPM2 protocol and provides drivers for FIFO and
> CRB interfaces. This patch set does not export any sysfs attributes for
> TPM 2.0 because existing sysfs attributes have three non-trivial issues:
>
> - They are associated with the platform device instead of character
> device.
> - They are are not trivial key-value pairs but contain text that is
> not easily parsed by a computer.
> - Raciness as described in
> http://kroah.com/log/blog/2013/06/26/how-to-create-a-sysfs-file-correctly/
>
> v2:
> - Improved struct tpm_chip life-cycle by taking advantage of devres
> API.
> - Refined sysfs attributes as simple key-values thereby not repeating
> mistakes in TPM1 sysfs attributes.
> - Documented functions in tpm-chip.c and tpm2-cmd.c.
> - Documented sysfs attributes.
>
> v3:
> - Lots of fixes in calling order in device drivers (thanks to Jason
> Gunthorpe for pointing these out!).
> - Attach sysfs attributes to the misc device because it represents
> TPM device to the user space.
>
> v4:
> - Disable sysfs attibutes for TPM 2.0 for until we can sort out the
> best approach for them.
> - Fixed all the style issues found with checkpatch.pl.
>
> v5:
> - missing EXPORT_SYMBOL_GPL()
> - own class for TPM devices used for TPM 2.0 devices and onwards.
>
> v6:
> - Non-racy initialization for sysfs attributes using struct device's
> groups field.
> - The class 'tpm' is used now for all TPM devices. For the first device
> node major MISC_MAJOR and minor TPM_MINOR is used in order to retain
> backwards compatability.
>
> v7:
> - Release device number and free struct tpm_chip memory inside
> tpm_dev_release callback.
> - Moved code from tpm-interface.c and tpm_dev.c to tpm-chip.c.
>
> v8:
> - Cleaned up unneeded cast from tpm_transmit_cmd().
> - Cleaned up redundant PPI_VERSION_LEN constant from tpm_ppi.c.
> - Fixed tpm_tis to use tpm2_calc_ordinal_duration() for TPM2 devices.
> - tpm_crb: in crb_recv, check that count can hold the TPM header at
> minimum.
> - tpm_crb: add enumerations for bit flags in start and cancel fields
> of the control area.
> - tpm_crb: use ioremap() for command and response buffer because
> they might be anywhere.
> - tpm_crb: use IO access functions for reading ioremapped buffers
> because using direct pointers is not portable.
> - tpm_crb: only apply ACPI start if start method reported by the
> TPM2 ACPI table allows it.
> - In tpm2_pcr_read() just calculate index and bit and get rid of
> hacky loop.
> - Do not add sysfs attributes for TPM 2.0 devices.
>
> v9:
> - Fixed compilation issues in v8 (sorry for not using the correct
> tree).
> - Just do "return tpm_chip_register();" instead of copying return
> value to a variable.
> - Removed unused tpm2_startup().
> - In the CRB driver ACPI TPM2 table could contain platform specific
> and therefore inequality test does not work. Fixed in this patch
> set.
>
> v10:
> - Fixed coccicheck and sparse errors and other reported style errors.
> - Fixed build errors without CONFIG_ACPI.
> - Fixed build error with CONFIG_OF.
> - Added TPM_CHIP_FLAG_REGISTERED to mark successful tpm_chip_register().
> It is checked in the beginning of tpm_chip_unregister(), which is
> called even when "attach" callback for a device fails because "detach"
> callback is always called.
> - Added TPM_CHIP_FLAG_PPI to mark successful PPI interface lookup because
> in older TPM chips version string might be non-existent.
> - Check TPM version from the 4th byte of STS register after requesting
> the locality because otherwise the read will return bogus data.
> - Some TPM chips just give 0xff as the 4th byte so using that for detecting
> TPM family is unstable. Instead I chose the approach of using idempotent
> TPM 2.x command to detect such case.
>
> Jarkko Sakkinen (8):
> tpm: merge duplicate transmit_cmd() functions
> tpm: two-phase chip management functions
> tpm: fix raciness of PPI interface lookup
> tpm: rename chip->dev to chip->pdev
> tpm: device class for tpm
> tpm: TPM 2.0 baseline support
> tpm: TPM 2.0 CRB Interface
> tpm: TPM 2.0 FIFO Interface
>
> Documentation/ABI/stable/sysfs-class-tpm | 22 +-
> drivers/char/tpm/Kconfig | 9 +
> drivers/char/tpm/Makefile | 3 +-
> drivers/char/tpm/tpm-chip.c | 256 +++++++++++++
> drivers/char/tpm/tpm-dev.c | 42 +--
> drivers/char/tpm/tpm-interface.c | 263 +++++--------
> drivers/char/tpm/tpm-sysfs.c | 29 +-
> drivers/char/tpm/tpm.h | 118 +++++-
> drivers/char/tpm/tpm2-cmd.c | 617 +++++++++++++++++++++++++++++++
> drivers/char/tpm/tpm_atmel.c | 25 +-
> drivers/char/tpm/tpm_crb.c | 354 ++++++++++++++++++
> drivers/char/tpm/tpm_i2c_atmel.c | 55 +--
> drivers/char/tpm/tpm_i2c_infineon.c | 43 +--
> drivers/char/tpm/tpm_i2c_nuvoton.c | 71 ++--
> drivers/char/tpm/tpm_i2c_stm_st33.c | 32 +-
> drivers/char/tpm/tpm_ibmvtpm.c | 17 +-
> drivers/char/tpm/tpm_infineon.c | 51 +--
> drivers/char/tpm/tpm_nsc.c | 34 +-
> drivers/char/tpm/tpm_ppi.c | 141 ++++---
> drivers/char/tpm/tpm_tis.c | 224 ++++++-----
> drivers/char/tpm/xen-tpmfront.c | 14 +-
> 21 files changed, 1820 insertions(+), 600 deletions(-)
> create mode 100644 drivers/char/tpm/tpm-chip.c
> create mode 100644 drivers/char/tpm/tpm2-cmd.c
> create mode 100644 drivers/char/tpm/tpm_crb.c
>
> --
> 2.1.0
>
> So, what do you think? Are we now settled with this?
Meh...
It does not recognize my tpm20 with force=1 :( :( :(
Probably since I don't have a machine with bios integration -> no tpm startup,
and your startup is returned with RC_SIZE :(
rmmod tpm; modprobe tpm_tis force=1 ; dmesg
modprobe: ERROR: could not insert 'tpm_tis': No such device
[ 77.744050] tpm_tis tpm_tis: 2.0 TPM (device-id 0x1A, rev-id 16)
[ 77.816049] tpm_tis tpm_tis: A TPM error (256) occurred attempting to generate an interrupt
[ 77.888043] tpm_tis tpm_tis: A TPM error (256) occurred attempting to generate an interrupt
[ 77.960043] tpm_tis tpm_tis: A TPM error (256) occurred attempting to generate an interrupt
[ 77.960057] genirq: Flags mismatch irq 6. 00000080 (tpm0) vs. 00000000 (floppy)
[ 77.960067] tpm_tis tpm_tis: Unable to request irq: 6 for probe
[ 77.960073] genirq: Flags mismatch irq 7. 00000080 (tpm0) vs. 00000000 (parport0)
[ 77.960077] tpm_tis tpm_tis: Unable to request irq: 7 for probe
[ 77.960082] genirq: Flags mismatch irq 8. 00000080 (tpm0) vs. 00000000 (rtc0)
[ 77.960087] tpm_tis tpm_tis: Unable to request irq: 8 for probe
[ 78.032041] tpm_tis tpm_tis: A TPM error (256) occurred attempting to generate an interrupt
[ 78.104043] tpm_tis tpm_tis: A TPM error (256) occurred attempting to generate an interrupt
[ 78.176041] tpm_tis tpm_tis: A TPM error (256) occurred attempting to generate an interrupt
[ 78.248041] tpm_tis tpm_tis: A TPM error (256) occurred attempting to generate an interrupt
[ 78.320041] tpm_tis tpm_tis: A TPM error (256) occurred attempting to generate an interrupt
[ 78.392040] tpm_tis tpm_tis: A TPM error (256) occurred attempting to generate an interrupt
[ 78.464041] tpm_tis tpm_tis: A TPM error (256) occurred attempting to generate an interrupt
[ 78.524041] tpm_tis tpm_tis: A TPM error (256) occurred continue selftest
[ 78.524048] tpm_tis tpm_tis: Firmware has not started TPM
[ 78.596041] tpm_tis tpm_tis: A TPM error (149) occurred attempting to start the TPM
[ 78.596048] tpm_tis tpm_tis: TPM self test failed
;(
Peter
On Tue, Dec 16, 2014 at 10:19:26PM +0100, Peter Huewe wrote:
> > So, what do you think? Are we now settled with this?
>
> Meh...
> It does not recognize my tpm20 with force=1 :( :( :(
> Probably since I don't have a machine with bios integration -> no tpm startup,
> and your startup is returned with RC_SIZE :(
I don't know why it worked for me. My dTPM2 does not export ACPI device
but I guess firmware does execute startup.
I root caused this quickly and attached patch here. Does that resolve
your issue?
> ?rmmod tpm; modprobe tpm_tis force=1 ; dmesg
> modprobe: ERROR: could not insert 'tpm_tis': No such device
> [ 77.744050] tpm_tis tpm_tis: 2.0 TPM (device-id 0x1A, rev-id 16)
> [ 77.816049] tpm_tis tpm_tis: A TPM error (256) occurred attempting to generate an interrupt
> [ 77.888043] tpm_tis tpm_tis: A TPM error (256) occurred attempting to generate an interrupt
> [ 77.960043] tpm_tis tpm_tis: A TPM error (256) occurred attempting to generate an interrupt
> [ 77.960057] genirq: Flags mismatch irq 6. 00000080 (tpm0) vs. 00000000 (floppy)
> [ 77.960067] tpm_tis tpm_tis: Unable to request irq: 6 for probe
> [ 77.960073] genirq: Flags mismatch irq 7. 00000080 (tpm0) vs. 00000000 (parport0)
> [ 77.960077] tpm_tis tpm_tis: Unable to request irq: 7 for probe
> [ 77.960082] genirq: Flags mismatch irq 8. 00000080 (tpm0) vs. 00000000 (rtc0)
> [ 77.960087] tpm_tis tpm_tis: Unable to request irq: 8 for probe
> [ 78.032041] tpm_tis tpm_tis: A TPM error (256) occurred attempting to generate an interrupt
> [ 78.104043] tpm_tis tpm_tis: A TPM error (256) occurred attempting to generate an interrupt
> [ 78.176041] tpm_tis tpm_tis: A TPM error (256) occurred attempting to generate an interrupt
> [ 78.248041] tpm_tis tpm_tis: A TPM error (256) occurred attempting to generate an interrupt
> [ 78.320041] tpm_tis tpm_tis: A TPM error (256) occurred attempting to generate an interrupt
> [ 78.392040] tpm_tis tpm_tis: A TPM error (256) occurred attempting to generate an interrupt
> [ 78.464041] tpm_tis tpm_tis: A TPM error (256) occurred attempting to generate an interrupt
> [ 78.524041] tpm_tis tpm_tis: A TPM error (256) occurred continue selftest
> [ 78.524048] tpm_tis tpm_tis: Firmware has not started TPM
> [ 78.596041] tpm_tis tpm_tis: A TPM error (149) occurred attempting to start the TPM
> [ 78.596048] tpm_tis tpm_tis: TPM self test failed
>
>
> ;(
> Peter
/Jarkko
On Tue, Dec 16, 2014 at 10:32:18PM +0100, Peter Huewe wrote:
> Hi,
> if I fix this (already adressed issue)
> #define TPM2_STARTUP_IN_SIZE \
> (sizeof(struct tpm_input_header) + \
> - sizeof(struct tpm2_pcr_read_in))
> + sizeof(struct tpm2_startup_in))
>
> it gets detected correctly.
>
> I'll fix it, no updated patch needed.
Oops, I was too fast :)
> Not sure however if I think to reuse tpm2_startup_in also for shutdown, simply
> because it has the same size, but ok.
They are equivalent messages except for the command code.
> Peter
/Jarkko