Moved PPI attributes to the character device directory. This aligns with
the sysfs guidelines and makes them race free because they are created
atomically with the character device as part of device_register().The
character device and the sysfs attributes appear at the same time to the
user space.
As part of this change we enable PPI attributes also for TPM 2.0
devices. In order to retain backwards compatibility with TPM 1.x
devices, a symlink is created to the platform device directory.
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jason Gunthorpe <jason.gunthorpe@obsidianresearch.com>
Tested-by: Mimi Zohar <zohar@linux.vnet.ibm.com> (on TPM 1.2)
Tested-by: Chris J Arges <chris.j.arges@canonical.com>
Tested-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
chip->dev.class = tpm_class;
chip->dev.release = tpm_dev_release;
chip->dev.parent = chip->pdev;
chip->dev.class = tpm_class;
chip->dev.release = tpm_dev_release;
chip->dev.parent = chip->pdev;
+#ifdef CONFIG_ACPI
+ chip->dev.groups = chip->groups;
+#endif
if (chip->dev_num == 0)
chip->dev.devt = MKDEV(MISC_MAJOR, TPM_MINOR);
if (chip->dev_num == 0)
chip->dev.devt = MKDEV(MISC_MAJOR, TPM_MINOR);
- rc = tpm_add_ppi(chip);
- if (rc) {
- tpm_sysfs_del_device(chip);
- return rc;
- }
-
chip->bios_dir = tpm_bios_log_setup(chip->devname);
return 0;
chip->bios_dir = tpm_bios_log_setup(chip->devname);
return 0;
if (chip->bios_dir)
tpm_bios_log_teardown(chip->bios_dir);
if (chip->bios_dir)
tpm_bios_log_teardown(chip->bios_dir);
- tpm_remove_ppi(chip);
-
tpm_sysfs_del_device(chip);
}
tpm_sysfs_del_device(chip);
}
rc = tpm_dev_add_device(chip);
if (rc)
goto out_err;
rc = tpm_dev_add_device(chip);
if (rc)
goto out_err;
+ if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) {
+ rc = __compat_only_sysfs_link_entry_to_kobj(&chip->pdev->kobj,
+ &chip->dev.kobj,
+ "ppi");
+ if (rc)
+ goto out_err;
+ }
+
/* Make the chip available. */
spin_lock(&driver_lock);
list_add_rcu(&chip->list, &tpm_chip_list);
/* Make the chip available. */
spin_lock(&driver_lock);
list_add_rcu(&chip->list, &tpm_chip_list);
spin_unlock(&driver_lock);
synchronize_rcu();
spin_unlock(&driver_lock);
synchronize_rcu();
+ if (!(chip->flags & TPM_CHIP_FLAG_TPM2))
+ sysfs_remove_link(&chip->pdev->kobj, "ppi");
+
tpm1_chip_unregister(chip);
tpm_dev_del_device(chip);
}
tpm1_chip_unregister(chip);
tpm_dev_del_device(chip);
}
enum tpm_chip_flags {
TPM_CHIP_FLAG_REGISTERED = BIT(0),
enum tpm_chip_flags {
TPM_CHIP_FLAG_REGISTERED = BIT(0),
- TPM_CHIP_FLAG_PPI = BIT(1),
- TPM_CHIP_FLAG_TPM2 = BIT(2),
+ TPM_CHIP_FLAG_TPM2 = BIT(1),
struct dentry **bios_dir;
#ifdef CONFIG_ACPI
struct dentry **bios_dir;
#ifdef CONFIG_ACPI
+ const struct attribute_group *groups[2];
+ unsigned int groups_cnt;
acpi_handle acpi_dev_handle;
char ppi_version[TPM_PPI_VERSION_LEN + 1];
#endif /* CONFIG_ACPI */
acpi_handle acpi_dev_handle;
char ppi_version[TPM_PPI_VERSION_LEN + 1];
#endif /* CONFIG_ACPI */
struct list_head list;
};
struct list_head list;
};
-#define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor)
+#define to_tpm_chip(d) container_of(d, struct tpm_chip, dev)
static inline void tpm_chip_put(struct tpm_chip *chip)
{
static inline void tpm_chip_put(struct tpm_chip *chip)
{
int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
#ifdef CONFIG_ACPI
int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
#ifdef CONFIG_ACPI
-extern int tpm_add_ppi(struct tpm_chip *chip);
-extern void tpm_remove_ppi(struct tpm_chip *chip);
+extern void tpm_add_ppi(struct tpm_chip *chip);
-static inline int tpm_add_ppi(struct tpm_chip *chip)
-{
- return 0;
-}
-
-static inline void tpm_remove_ppi(struct tpm_chip *chip)
+static inline void tpm_add_ppi(struct tpm_chip *chip)
static ssize_t tpm_show_ppi_version(struct device *dev,
struct device_attribute *attr, char *buf)
{
static ssize_t tpm_show_ppi_version(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct tpm_chip *chip = dev_get_drvdata(dev);
+ struct tpm_chip *chip = to_tpm_chip(dev);
return scnprintf(buf, PAGE_SIZE, "%s\n", chip->ppi_version);
}
return scnprintf(buf, PAGE_SIZE, "%s\n", chip->ppi_version);
}
{
ssize_t size = -EINVAL;
union acpi_object *obj;
{
ssize_t size = -EINVAL;
union acpi_object *obj;
- struct tpm_chip *chip = dev_get_drvdata(dev);
+ struct tpm_chip *chip = to_tpm_chip(dev);
obj = tpm_eval_dsm(chip->acpi_dev_handle, TPM_PPI_FN_GETREQ,
ACPI_TYPE_PACKAGE, NULL);
obj = tpm_eval_dsm(chip->acpi_dev_handle, TPM_PPI_FN_GETREQ,
ACPI_TYPE_PACKAGE, NULL);
int func = TPM_PPI_FN_SUBREQ;
union acpi_object *obj, tmp;
union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp);
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);
+ struct tpm_chip *chip = to_tpm_chip(dev);
/*
* the function to submit TPM operation request to pre-os environment
/*
* the function to submit TPM operation request to pre-os environment
.buffer.length = 0,
.buffer.pointer = NULL
};
.buffer.length = 0,
.buffer.pointer = NULL
};
- struct tpm_chip *chip = dev_get_drvdata(dev);
+ struct tpm_chip *chip = to_tpm_chip(dev);
static char *info[] = {
"None",
static char *info[] = {
"None",
acpi_status status = -EINVAL;
union acpi_object *obj, *ret_obj;
u64 req, res;
acpi_status status = -EINVAL;
union acpi_object *obj, *ret_obj;
u64 req, res;
- struct tpm_chip *chip = dev_get_drvdata(dev);
+ struct tpm_chip *chip = to_tpm_chip(dev);
obj = tpm_eval_dsm(chip->acpi_dev_handle, TPM_PPI_FN_GETRSP,
ACPI_TYPE_PACKAGE, NULL);
obj = tpm_eval_dsm(chip->acpi_dev_handle, TPM_PPI_FN_GETRSP,
ACPI_TYPE_PACKAGE, NULL);
struct device_attribute *attr,
char *buf)
{
struct device_attribute *attr,
char *buf)
{
- struct tpm_chip *chip = dev_get_drvdata(dev);
+ struct tpm_chip *chip = to_tpm_chip(dev);
return show_ppi_operations(chip->acpi_dev_handle, buf, 0,
PPI_TPM_REQ_MAX);
return show_ppi_operations(chip->acpi_dev_handle, buf, 0,
PPI_TPM_REQ_MAX);
struct device_attribute *attr,
char *buf)
{
struct device_attribute *attr,
char *buf)
{
- struct tpm_chip *chip = dev_get_drvdata(dev);
+ struct tpm_chip *chip = to_tpm_chip(dev);
return show_ppi_operations(chip->acpi_dev_handle, buf, PPI_VS_REQ_START,
PPI_VS_REQ_END);
return show_ppi_operations(chip->acpi_dev_handle, buf, PPI_VS_REQ_START,
PPI_VS_REQ_END);
-int tpm_add_ppi(struct tpm_chip *chip)
+void tpm_add_ppi(struct tpm_chip *chip)
{
union acpi_object *obj;
{
union acpi_object *obj;
if (!chip->acpi_dev_handle)
if (!chip->acpi_dev_handle)
if (!acpi_check_dsm(chip->acpi_dev_handle, tpm_ppi_uuid,
TPM_PPI_REVISION_ID, 1 << TPM_PPI_FN_VERSION))
if (!acpi_check_dsm(chip->acpi_dev_handle, tpm_ppi_uuid,
TPM_PPI_REVISION_ID, 1 << TPM_PPI_FN_VERSION))
/* Cache PPI version string. */
obj = acpi_evaluate_dsm_typed(chip->acpi_dev_handle, tpm_ppi_uuid,
/* Cache PPI version string. */
obj = acpi_evaluate_dsm_typed(chip->acpi_dev_handle, tpm_ppi_uuid,
- rc = sysfs_create_group(&chip->pdev->kobj, &ppi_attr_grp);
-
- if (!rc)
- chip->flags |= TPM_CHIP_FLAG_PPI;
-
- return rc;
-}
-
-void tpm_remove_ppi(struct tpm_chip *chip)
-{
- if (chip->flags & TPM_CHIP_FLAG_PPI)
- sysfs_remove_group(&chip->pdev->kobj, &ppi_attr_grp);
+ chip->groups[chip->groups_cnt++] = &ppi_attr_grp;